{}
};
+static struct resource nand_resource[] = {
+ [0] = {
+ .start = MM_ADDR_IO_NAND,
+ .end = MM_ADDR_IO_NAND + 0x1000 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
static struct platform_device nand_device = {
.name = "bcm-nand",
.id = -1,
+ .resource = nand_resource,
+ .num_resources = ARRAY_SIZE(nand_resource),
};
static struct platform_device *devices[] __initdata = {
--- /dev/null
+/*****************************************************************************
+* Copyright 2001 - 2008 Broadcom Corporation. All rights reserved.
+*
+* Unless you and Broadcom execute a separate written software license
+* agreement governing use of this software, this software is licensed to you
+* under the terms of the GNU General Public License version 2, available at
+* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
+*
+* Notwithstanding the above, under no circumstances may you combine this
+* software in any way with any other Broadcom software provided under a
+* license other than the GPL, without Broadcom's express prior written
+* consent.
+*****************************************************************************/
+
+/*
+*
+*****************************************************************************
+*
+* REG_NAND.h
+*
+* PURPOSE:
+*
+* This file contains definitions for the nand registers:
+*
+* NOTES:
+*
+*****************************************************************************/
+
+#if !defined(__ASM_ARCH_REG_NAND_H)
+#define __ASM_ARCH_REG_NAND_H
+
+/* ---- Include Files ---------------------------------------------------- */
+#include <csp/reg.h>
+#include <mach/reg_umi.h>
+
+/* ---- Constants and Types ---------------------------------------------- */
+
+#define HW_NAND_BASE MM_IO_BASE_NAND /* NAND Flash */
+
+/* DMA accesses by the bootstrap need hard nonvirtual addresses */
+#define REG_NAND_CMD __REG16(HW_NAND_BASE + 0)
+#define REG_NAND_ADDR __REG16(HW_NAND_BASE + 4)
+
+#define REG_NAND_PHYS_DATA16 (HW_NAND_BASE + 8)
+#define REG_NAND_PHYS_DATA8 (HW_NAND_BASE + 8)
+#define REG_NAND_DATA16 __REG16(REG_NAND_PHYS_DATA16)
+#define REG_NAND_DATA8 __REG8(REG_NAND_PHYS_DATA8)
+
+/* use appropriate offset to make sure it start at the 1K boundary */
+#define REG_NAND_PHYS_DATA_DMA (HW_NAND_BASE + 0x400)
+#define REG_NAND_DATA_DMA __REG32(REG_NAND_PHYS_DATA_DMA)
+
+/* Linux DMA requires physical address of the data register */
+#define REG_NAND_DATA16_PADDR HW_IO_VIRT_TO_PHYS(REG_NAND_PHYS_DATA16)
+#define REG_NAND_DATA8_PADDR HW_IO_VIRT_TO_PHYS(REG_NAND_PHYS_DATA8)
+#define REG_NAND_DATA_PADDR HW_IO_VIRT_TO_PHYS(REG_NAND_PHYS_DATA_DMA)
+
+#define NAND_BUS_16BIT() (0)
+#define NAND_BUS_8BIT() (!NAND_BUS_16BIT())
+
+/* Register offsets */
+#define REG_NAND_CMD_OFFSET (0)
+#define REG_NAND_ADDR_OFFSET (4)
+#define REG_NAND_DATA8_OFFSET (8)
+
+#endif
--- /dev/null
+/*****************************************************************************
+* Copyright 2005 - 2008 Broadcom Corporation. All rights reserved.
+*
+* Unless you and Broadcom execute a separate written software license
+* agreement governing use of this software, this software is licensed to you
+* under the terms of the GNU General Public License version 2, available at
+* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
+*
+* Notwithstanding the above, under no circumstances may you combine this
+* software in any way with any other Broadcom software provided under a
+* license other than the GPL, without Broadcom's express prior written
+* consent.
+*****************************************************************************/
+
+/*
+*
+*****************************************************************************
+*
+* REG_UMI.h
+*
+* PURPOSE:
+*
+* This file contains definitions for the nand registers:
+*
+* NOTES:
+*
+*****************************************************************************/
+
+#if !defined(__ASM_ARCH_REG_UMI_H)
+#define __ASM_ARCH_REG_UMI_H
+
+/* ---- Include Files ---------------------------------------------------- */
+#include <csp/reg.h>
+#include <mach/csp/mm_io.h>
+
+/* ---- Constants and Types ---------------------------------------------- */
+
+/* Unified Memory Interface Ctrl Register */
+#define HW_UMI_BASE MM_IO_BASE_UMI
+
+/* Flash bank 0 timing and control register */
+#define REG_UMI_FLASH0_TCR __REG32(HW_UMI_BASE + 0x00)
+/* Flash bank 1 timing and control register */
+#define REG_UMI_FLASH1_TCR __REG32(HW_UMI_BASE + 0x04)
+/* Flash bank 2 timing and control register */
+#define REG_UMI_FLASH2_TCR __REG32(HW_UMI_BASE + 0x08)
+/* MMD interface and control register */
+#define REG_UMI_MMD_ICR __REG32(HW_UMI_BASE + 0x0c)
+/* NAND timing and control register */
+#define REG_UMI_NAND_TCR __REG32(HW_UMI_BASE + 0x18)
+/* NAND ready/chip select register */
+#define REG_UMI_NAND_RCSR __REG32(HW_UMI_BASE + 0x1c)
+/* NAND ECC control & status register */
+#define REG_UMI_NAND_ECC_CSR __REG32(HW_UMI_BASE + 0x20)
+/* NAND ECC data register XXB2B1B0 */
+#define REG_UMI_NAND_ECC_DATA __REG32(HW_UMI_BASE + 0x24)
+/* BCH ECC Parameter N */
+#define REG_UMI_BCH_N __REG32(HW_UMI_BASE + 0x40)
+/* BCH ECC Parameter T */
+#define REG_UMI_BCH_K __REG32(HW_UMI_BASE + 0x44)
+/* BCH ECC Parameter K */
+#define REG_UMI_BCH_T __REG32(HW_UMI_BASE + 0x48)
+/* BCH ECC Contro Status */
+#define REG_UMI_BCH_CTRL_STATUS __REG32(HW_UMI_BASE + 0x4C)
+/* BCH WR ECC 31:0 */
+#define REG_UMI_BCH_WR_ECC_0 __REG32(HW_UMI_BASE + 0x50)
+/* BCH WR ECC 63:32 */
+#define REG_UMI_BCH_WR_ECC_1 __REG32(HW_UMI_BASE + 0x54)
+/* BCH WR ECC 95:64 */
+#define REG_UMI_BCH_WR_ECC_2 __REG32(HW_UMI_BASE + 0x58)
+/* BCH WR ECC 127:96 */
+#define REG_UMI_BCH_WR_ECC_3 __REG32(HW_UMI_BASE + 0x5c)
+/* BCH WR ECC 155:128 */
+#define REG_UMI_BCH_WR_ECC_4 __REG32(HW_UMI_BASE + 0x60)
+/* BCH Read Error Location 1,0 */
+#define REG_UMI_BCH_RD_ERR_LOC_1_0 __REG32(HW_UMI_BASE + 0x64)
+/* BCH Read Error Location 3,2 */
+#define REG_UMI_BCH_RD_ERR_LOC_3_2 __REG32(HW_UMI_BASE + 0x68)
+/* BCH Read Error Location 5,4 */
+#define REG_UMI_BCH_RD_ERR_LOC_5_4 __REG32(HW_UMI_BASE + 0x6c)
+/* BCH Read Error Location 7,6 */
+#define REG_UMI_BCH_RD_ERR_LOC_7_6 __REG32(HW_UMI_BASE + 0x70)
+/* BCH Read Error Location 9,8 */
+#define REG_UMI_BCH_RD_ERR_LOC_9_8 __REG32(HW_UMI_BASE + 0x74)
+/* BCH Read Error Location 11,10 */
+#define REG_UMI_BCH_RD_ERR_LOC_B_A __REG32(HW_UMI_BASE + 0x78)
+
+/* REG_UMI_FLASH0/1/2_TCR, REG_UMI_SRAM0/1_TCR bits */
+/* Enable wait pin during burst write or read */
+#define REG_UMI_TCR_WAITEN 0x80000000
+/* Enable mem ctrlr to work iwth ext mem of lower freq than AHB clk */
+#define REG_UMI_TCR_LOWFREQ 0x40000000
+/* 1=synch write, 0=async write */
+#define REG_UMI_TCR_MEMTYPE_SYNCWRITE 0x20000000
+/* 1=synch read, 0=async read */
+#define REG_UMI_TCR_MEMTYPE_SYNCREAD 0x10000000
+/* 1=page mode read, 0=normal mode read */
+#define REG_UMI_TCR_MEMTYPE_PAGEREAD 0x08000000
+/* page size/burst size (wrap only) */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_MASK 0x07000000
+/* 4 word */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_4 0x00000000
+/* 8 word */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_8 0x01000000
+/* 16 word */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_16 0x02000000
+/* 32 word */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_32 0x03000000
+/* 64 word */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_64 0x04000000
+/* 128 word */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_128 0x05000000
+/* 256 word */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_256 0x06000000
+/* 512 word */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_512 0x07000000
+/* Page read access cycle / Burst write latency (n+2 / n+1) */
+#define REG_UMI_TCR_TPRC_TWLC_MASK 0x00f80000
+/* Bus turnaround cycle (n) */
+#define REG_UMI_TCR_TBTA_MASK 0x00070000
+/* Write pulse width cycle (n+1) */
+#define REG_UMI_TCR_TWP_MASK 0x0000f800
+/* Write recovery cycle (n+1) */
+#define REG_UMI_TCR_TWR_MASK 0x00000600
+/* Write address setup cycle (n+1) */
+#define REG_UMI_TCR_TAS_MASK 0x00000180
+/* Output enable delay cycle (n) */
+#define REG_UMI_TCR_TOE_MASK 0x00000060
+/* Read access cycle / Burst read latency (n+2 / n+1) */
+#define REG_UMI_TCR_TRC_TLC_MASK 0x0000001f
+
+/* REG_UMI_MMD_ICR bits */
+/* Flash write protection pin control */
+#define REG_UMI_MMD_ICR_FLASH_WP 0x8000
+/* Extend hold time for sram0, sram1 csn (39 MHz operation) */
+#define REG_UMI_MMD_ICR_XHCS 0x4000
+/* Enable SDRAM 2 interface control */
+#define REG_UMI_MMD_ICR_SDRAM2EN 0x2000
+/* Enable merge of flash banks 0/1 to 512 MBit bank */
+#define REG_UMI_MMD_ICR_INST512 0x1000
+/* Enable merge of flash banks 1/2 to 512 MBit bank */
+#define REG_UMI_MMD_ICR_DATA512 0x0800
+/* Enable SDRAM interface control */
+#define REG_UMI_MMD_ICR_SDRAMEN 0x0400
+/* Polarity of busy state of Burst Wait Signal */
+#define REG_UMI_MMD_ICR_WAITPOL 0x0200
+/* Enable burst clock stopped when not accessing external burst flash/sram */
+#define REG_UMI_MMD_ICR_BCLKSTOP 0x0100
+/* Enable the peri1_csn to replace flash1_csn in 512 Mb flash mode */
+#define REG_UMI_MMD_ICR_PERI1EN 0x0080
+/* Enable the peri2_csn to replace sdram_csn */
+#define REG_UMI_MMD_ICR_PERI2EN 0x0040
+/* Enable the peri3_csn to replace sdram2_csn */
+#define REG_UMI_MMD_ICR_PERI3EN 0x0020
+/* Enable sram bank1 for H/W controlled MRS */
+#define REG_UMI_MMD_ICR_MRSB1 0x0010
+/* Enable sram bank0 for H/W controlled MRS */
+#define REG_UMI_MMD_ICR_MRSB0 0x0008
+/* Polarity for assert3ed state of H/W controlled MRS */
+#define REG_UMI_MMD_ICR_MRSPOL 0x0004
+/* 0: S/W controllable ZZ/MRS/CRE/P-Mode pin */
+/* 1: H/W controlled ZZ/MRS/CRE/P-Mode, same timing as CS */
+#define REG_UMI_MMD_ICR_MRSMODE 0x0002
+/* MRS state for S/W controlled mode */
+#define REG_UMI_MMD_ICR_MRSSTATE 0x0001
+
+/* REG_UMI_NAND_TCR bits */
+/* Enable software to control CS */
+#define REG_UMI_NAND_TCR_CS_SWCTRL 0x80000000
+/* 16-bit nand wordsize if set */
+#define REG_UMI_NAND_TCR_WORD16 0x40000000
+/* Bus turnaround cycle (n) */
+#define REG_UMI_NAND_TCR_TBTA_MASK 0x00070000
+/* Write pulse width cycle (n+1) */
+#define REG_UMI_NAND_TCR_TWP_MASK 0x0000f800
+/* Write recovery cycle (n+1) */
+#define REG_UMI_NAND_TCR_TWR_MASK 0x00000600
+/* Write address setup cycle (n+1) */
+#define REG_UMI_NAND_TCR_TAS_MASK 0x00000180
+/* Output enable delay cycle (n) */
+#define REG_UMI_NAND_TCR_TOE_MASK 0x00000060
+/* Read access cycle (n+2) */
+#define REG_UMI_NAND_TCR_TRC_TLC_MASK 0x0000001f
+
+/* REG_UMI_NAND_RCSR bits */
+/* Status: Ready=1, Busy=0 */
+#define REG_UMI_NAND_RCSR_RDY 0x02
+/* Keep CS asserted during operation */
+#define REG_UMI_NAND_RCSR_CS_ASSERTED 0x01
+
+/* REG_UMI_NAND_ECC_CSR bits */
+/* Interrupt status - read-only */
+#define REG_UMI_NAND_ECC_CSR_NANDINT 0x80000000
+/* Read: Status of ECC done, Write: clear ECC interrupt */
+#define REG_UMI_NAND_ECC_CSR_ECCINT_RAW 0x00800000
+/* Read: Status of R/B, Write: clear R/B interrupt */
+#define REG_UMI_NAND_ECC_CSR_RBINT_RAW 0x00400000
+/* 1 = Enable ECC Interrupt */
+#define REG_UMI_NAND_ECC_CSR_ECCINT_ENABLE 0x00008000
+/* 1 = Assert interrupt at rising edge of R/B_ */
+#define REG_UMI_NAND_ECC_CSR_RBINT_ENABLE 0x00004000
+/* Calculate ECC by 0=512 bytes, 1=256 bytes */
+#define REG_UMI_NAND_ECC_CSR_256BYTE 0x00000080
+/* Enable ECC in hardware */
+#define REG_UMI_NAND_ECC_CSR_ECC_ENABLE 0x00000001
+
+/* REG_UMI_BCH_CTRL_STATUS bits */
+/* Shift to Indicate Number of correctable errors detected */
+#define REG_UMI_BCH_CTRL_STATUS_NB_CORR_ERROR_SHIFT 20
+/* Indicate Number of correctable errors detected */
+#define REG_UMI_BCH_CTRL_STATUS_NB_CORR_ERROR 0x00F00000
+/* Indicate Errors detected during read but uncorrectable */
+#define REG_UMI_BCH_CTRL_STATUS_UNCORR_ERR 0x00080000
+/* Indicate Errors detected during read and are correctable */
+#define REG_UMI_BCH_CTRL_STATUS_CORR_ERR 0x00040000
+/* Flag indicates BCH's ECC status of read process are valid */
+#define REG_UMI_BCH_CTRL_STATUS_RD_ECC_VALID 0x00020000
+/* Flag indicates BCH's ECC status of write process are valid */
+#define REG_UMI_BCH_CTRL_STATUS_WR_ECC_VALID 0x00010000
+/* Pause ECC calculation */
+#define REG_UMI_BCH_CTRL_STATUS_PAUSE_ECC_DEC 0x00000010
+/* Enable Interrupt */
+#define REG_UMI_BCH_CTRL_STATUS_INT_EN 0x00000004
+/* Enable ECC during read */
+#define REG_UMI_BCH_CTRL_STATUS_ECC_RD_EN 0x00000002
+/* Enable ECC during write */
+#define REG_UMI_BCH_CTRL_STATUS_ECC_WR_EN 0x00000001
+/* Mask for location */
+#define REG_UMI_BCH_ERR_LOC_MASK 0x00001FFF
+/* location within a byte */
+#define REG_UMI_BCH_ERR_LOC_BYTE 0x00000007
+/* location within a word */
+#define REG_UMI_BCH_ERR_LOC_WORD 0x00000018
+/* location within a page (512 byte) */
+#define REG_UMI_BCH_ERR_LOC_PAGE 0x00001FE0
+#define REG_UMI_BCH_ERR_LOC_ADDR(index) (__REG32(HW_UMI_BASE + 0x64 + (index / 2)*4) >> ((index % 2) * 16))
+#endif
/* e.g. NAND_BUSWIDTH_16 or NAND_USE_FLASH_BBT */
unsigned options;
+
+ /* Main and mirror bbt descriptor overrides */
+ struct nand_bbt_descr *bbt_td;
+ struct nand_bbt_descr *bbt_md;
};
#endif /* __ARCH_ARM_DAVINCI_NAND_H */
#include <linux/gpio.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
+#include <linux/mtd/onenand.h>
#include <linux/mtd/partitions.h>
#include <linux/io.h>
#include <asm/sizes.h>
}
};
-static struct flash_platform_data nhk8815_onenand_data = {
+static struct onenand_platform_data nhk8815_onenand_data = {
.parts = nhk8815_onenand_partitions,
.nr_parts = ARRAY_SIZE(nhk8815_onenand_partitions),
};
};
static struct platform_device nhk8815_onenand_device = {
- .name = "onenand",
+ .name = "onenand-flash",
.id = -1,
.dev = {
.platform_data = &nhk8815_onenand_data,
static void __init nhk8815_onenand_init(void)
{
-#ifdef CONFIG_ONENAND
+#ifdef CONFIG_MTD_ONENAND
/* Set up SMCS0 for OneNand */
- writel(0x000030db, FSMC_BCR0);
- writel(0x02100551, FSMC_BTR0);
+ writel(0x000030db, FSMC_BCR(0));
+ writel(0x02100551, FSMC_BTR(0));
#endif
}
struct mxc_nand_platform_data {
int width; /* data bus width in bytes */
- int hw_ecc; /* 0 if supress hardware ECC */
+ int hw_ecc:1; /* 0 if supress hardware ECC */
+ int flash_bbt:1; /* set to 1 to use a flash based bbt */
};
#endif /* __ASM_ARCH_NAND_H */
* Setting this flag will allow the kernel to
* look for it at boot time and also skip the NAND
* scan.
+ * @options: Default value to set into 'struct nand_chip' options.
* @nr_chips: Number of chips in this set
* @nr_partitions: Number of partitions pointed to by @partitions
* @name: Name of set (optional)
unsigned int disable_ecc:1;
unsigned int flash_bbt:1;
+ unsigned int options;
int nr_chips;
int nr_partitions;
char *name;
// debugging, turns off buffer write mode if set to 1
#define FORCE_WORD_WRITE 0
-#define MANUFACTURER_INTEL 0x0089
+/* Intel chips */
#define I82802AB 0x00ad
#define I82802AC 0x00ac
#define PF38F4476 0x881c
-#define MANUFACTURER_ST 0x0020
+/* STMicroelectronics chips */
#define M50LPW080 0x002F
#define M50FLW080A 0x0080
#define M50FLW080B 0x0081
+/* Atmel chips */
#define AT49BV640D 0x02de
+#define AT49BV640DT 0x02db
static int cfi_intelext_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
static int cfi_intelext_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
cfi->cfiq->BufWriteTimeoutMax = 0;
}
+static void fixup_at49bv640dx_lock(struct mtd_info *mtd, void *param)
+{
+ struct map_info *map = mtd->priv;
+ struct cfi_private *cfi = map->fldrv_priv;
+ struct cfi_pri_intelext *cfip = cfi->cmdset_priv;
+
+ cfip->FeatureSupport |= (1 << 5);
+ mtd->flags |= MTD_POWERUP_LOCK;
+}
+
#ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE
/* Some Intel Strata Flash prior to FPO revision C has bugs in this area */
static void fixup_intel_strataflash(struct mtd_info *mtd, void* param)
static struct cfi_fixup cfi_fixup_table[] = {
{ CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL },
+ { CFI_MFR_ATMEL, AT49BV640D, fixup_at49bv640dx_lock, NULL },
+ { CFI_MFR_ATMEL, AT49BV640DT, fixup_at49bv640dx_lock, NULL },
#ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE
{ CFI_MFR_ANY, CFI_ID_ANY, fixup_intel_strataflash, NULL },
#endif
#endif
{ CFI_MFR_ST, 0x00ba, /* M28W320CT */ fixup_st_m28w320ct, NULL },
{ CFI_MFR_ST, 0x00bb, /* M28W320CB */ fixup_st_m28w320cb, NULL },
- { MANUFACTURER_INTEL, CFI_ID_ANY, fixup_unlock_powerup_lock, NULL, },
+ { CFI_MFR_INTEL, CFI_ID_ANY, fixup_unlock_powerup_lock, NULL, },
{ 0, 0, NULL, NULL }
};
static struct cfi_fixup jedec_fixup_table[] = {
- { MANUFACTURER_INTEL, I82802AB, fixup_use_fwh_lock, NULL, },
- { MANUFACTURER_INTEL, I82802AC, fixup_use_fwh_lock, NULL, },
- { MANUFACTURER_ST, M50LPW080, fixup_use_fwh_lock, NULL, },
- { MANUFACTURER_ST, M50FLW080A, fixup_use_fwh_lock, NULL, },
- { MANUFACTURER_ST, M50FLW080B, fixup_use_fwh_lock, NULL, },
+ { CFI_MFR_INTEL, I82802AB, fixup_use_fwh_lock, NULL, },
+ { CFI_MFR_INTEL, I82802AC, fixup_use_fwh_lock, NULL, },
+ { CFI_MFR_ST, M50LPW080, fixup_use_fwh_lock, NULL, },
+ { CFI_MFR_ST, M50FLW080A, fixup_use_fwh_lock, NULL, },
+ { CFI_MFR_ST, M50FLW080B, fixup_use_fwh_lock, NULL, },
{ 0, 0, NULL, NULL }
};
static struct cfi_fixup fixup_table[] = {
static void cfi_fixup_major_minor(struct cfi_private *cfi,
struct cfi_pri_intelext *extp)
{
- if (cfi->mfr == MANUFACTURER_INTEL &&
+ if (cfi->mfr == CFI_MFR_INTEL &&
cfi->id == PF38F4476 && extp->MinorVersion == '3')
extp->MinorVersion = '1';
}
/* Some chips have OTP located in the _top_ partition only.
For example: Intel 28F256L18T (T means top-parameter device) */
- if (cfi->mfr == MANUFACTURER_INTEL) {
+ if (cfi->mfr == CFI_MFR_INTEL) {
switch (cfi->id) {
case 0x880b:
case 0x880c:
if (!ret) {
map_write(map, CMD(0xff), chip->start);
chip->state = FL_SHUTDOWN;
+ put_chip(map, chip, chip->start);
}
spin_unlock(chip->mutex);
}
}
#endif
- /* FIXME: erase-suspend-program is broken. See
- http://lists.infradead.org/pipermail/linux-mtd/2003-December/009001.html */
- printk(KERN_NOTICE "cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.\n");
-
__module_get(THIS_MODULE);
return mtd;
if (time_after(jiffies, timeo)) {
printk(KERN_ERR "Waiting for chip to be ready timed out.\n");
- spin_unlock(chip->mutex);
return -EIO;
}
spin_unlock(chip->mutex);
return 0;
case FL_ERASING:
- if (mode == FL_WRITING) /* FIXME: Erase-suspend-program appears broken. */
- goto sleep;
-
- if (!( mode == FL_READY
- || mode == FL_POINT
- || !cfip
- || (mode == FL_WRITING && (cfip->EraseSuspend & 0x2))
- || (mode == FL_WRITING && (cfip->EraseSuspend & 0x1)
- )))
+ if (!cfip || !(cfip->EraseSuspend & (0x1|0x2)) ||
+ !(mode == FL_READY || mode == FL_POINT ||
+ (mode == FL_WRITING && (cfip->EraseSuspend & 0x2))))
goto sleep;
/* We could check to see if we're trying to access the sector
/* ST M29DW chips */
cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL);
cfi_send_gen_cmd(0x98, 0x555, base, map, cfi, cfi->device_type, NULL);
+ if (cfi_qry_present(map, base, cfi))
+ return 1;
+ /* some old SST chips, e.g. 39VF160x/39VF320x */
+ cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL);
+ cfi_send_gen_cmd(0xAA, 0x5555, base, map, cfi, cfi->device_type, NULL);
+ cfi_send_gen_cmd(0x55, 0x2AAA, base, map, cfi, cfi->device_type, NULL);
+ cfi_send_gen_cmd(0x98, 0x5555, base, map, cfi, cfi->device_type, NULL);
if (cfi_qry_present(map, base, cfi))
return 1;
/* QRY not found */
/* ST - www.st.com */
#define M29F800AB 0x0058
-#define M29W800DT 0x00D7
-#define M29W800DB 0x005B
+#define M29W800DT 0x22D7
+#define M29W800DB 0x225B
#define M29W400DT 0x00EE
#define M29W400DB 0x00EF
#define M29W160DT 0x22C4
.dev_id = M29W800DT,
.name = "ST M29W800DT",
.devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8,
- .uaddr = MTD_UADDR_0x5555_0x2AAA, /* ???? */
+ .uaddr = MTD_UADDR_0x0AAA_0x0555,
.dev_size = SIZE_1MiB,
.cmd_set = P_ID_AMD_STD,
.nr_regions = 4,
.dev_id = M29W800DB,
.name = "ST M29W800DB",
.devtypes = CFI_DEVICETYPE_X16|CFI_DEVICETYPE_X8,
- .uaddr = MTD_UADDR_0x5555_0x2AAA, /* ???? */
+ .uaddr = MTD_UADDR_0x0AAA_0x0555,
.dev_size = SIZE_1MiB,
.cmd_set = P_ID_AMD_STD,
.nr_regions = 4,
#include <linux/mutex.h>
#include <linux/math64.h>
#include <linux/sched.h>
+#include <linux/mod_devicetable.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/spi/spi.h>
#include <linux/spi/flash.h>
-
-#define FLASH_PAGESIZE 256
-
/* Flash opcodes. */
#define OPCODE_WREN 0x06 /* Write enable */
#define OPCODE_RDSR 0x05 /* Read status register */
/* Define max times to check status register before we give up. */
#define MAX_READY_WAIT_JIFFIES (40 * HZ) /* M25P16 specs 40s max chip erase */
-#define CMD_SIZE 4
+#define MAX_CMD_SIZE 4
#ifdef CONFIG_M25PXX_USE_FAST_READ
#define OPCODE_READ OPCODE_FAST_READ
struct mutex lock;
struct mtd_info mtd;
unsigned partitioned:1;
+ u16 page_size;
+ u16 addr_width;
u8 erase_opcode;
- u8 command[CMD_SIZE + FAST_READ_DUMMY_BYTE];
+ u8 *command;
};
static inline struct m25p *mtd_to_m25p(struct mtd_info *mtd)
return 0;
}
+static void m25p_addr2cmd(struct m25p *flash, unsigned int addr, u8 *cmd)
+{
+ /* opcode is in cmd[0] */
+ cmd[1] = addr >> (flash->addr_width * 8 - 8);
+ cmd[2] = addr >> (flash->addr_width * 8 - 16);
+ cmd[3] = addr >> (flash->addr_width * 8 - 24);
+}
+
+static int m25p_cmdsz(struct m25p *flash)
+{
+ return 1 + flash->addr_width;
+}
+
/*
* Erase one sector of flash memory at offset ``offset'' which is any
* address within the sector which should be erased.
/* Set up command buffer. */
flash->command[0] = flash->erase_opcode;
- flash->command[1] = offset >> 16;
- flash->command[2] = offset >> 8;
- flash->command[3] = offset;
+ m25p_addr2cmd(flash, offset, flash->command);
- spi_write(flash->spi, flash->command, CMD_SIZE);
+ spi_write(flash->spi, flash->command, m25p_cmdsz(flash));
return 0;
}
* Should add 1 byte DUMMY_BYTE.
*/
t[0].tx_buf = flash->command;
- t[0].len = CMD_SIZE + FAST_READ_DUMMY_BYTE;
+ t[0].len = m25p_cmdsz(flash) + FAST_READ_DUMMY_BYTE;
spi_message_add_tail(&t[0], &m);
t[1].rx_buf = buf;
/* Set up the write data buffer. */
flash->command[0] = OPCODE_READ;
- flash->command[1] = from >> 16;
- flash->command[2] = from >> 8;
- flash->command[3] = from;
+ m25p_addr2cmd(flash, from, flash->command);
spi_sync(flash->spi, &m);
- *retlen = m.actual_length - CMD_SIZE - FAST_READ_DUMMY_BYTE;
+ *retlen = m.actual_length - m25p_cmdsz(flash) - FAST_READ_DUMMY_BYTE;
mutex_unlock(&flash->lock);
memset(t, 0, (sizeof t));
t[0].tx_buf = flash->command;
- t[0].len = CMD_SIZE;
+ t[0].len = m25p_cmdsz(flash);
spi_message_add_tail(&t[0], &m);
t[1].tx_buf = buf;
/* Set up the opcode in the write buffer. */
flash->command[0] = OPCODE_PP;
- flash->command[1] = to >> 16;
- flash->command[2] = to >> 8;
- flash->command[3] = to;
+ m25p_addr2cmd(flash, to, flash->command);
- /* what page do we start with? */
- page_offset = to % FLASH_PAGESIZE;
+ page_offset = to & (flash->page_size - 1);
/* do all the bytes fit onto one page? */
- if (page_offset + len <= FLASH_PAGESIZE) {
+ if (page_offset + len <= flash->page_size) {
t[1].len = len;
spi_sync(flash->spi, &m);
- *retlen = m.actual_length - CMD_SIZE;
+ *retlen = m.actual_length - m25p_cmdsz(flash);
} else {
u32 i;
/* the size of data remaining on the first page */
- page_size = FLASH_PAGESIZE - page_offset;
+ page_size = flash->page_size - page_offset;
t[1].len = page_size;
spi_sync(flash->spi, &m);
- *retlen = m.actual_length - CMD_SIZE;
+ *retlen = m.actual_length - m25p_cmdsz(flash);
- /* write everything in PAGESIZE chunks */
+ /* write everything in flash->page_size chunks */
for (i = page_size; i < len; i += page_size) {
page_size = len - i;
- if (page_size > FLASH_PAGESIZE)
- page_size = FLASH_PAGESIZE;
+ if (page_size > flash->page_size)
+ page_size = flash->page_size;
/* write the next page to flash */
- flash->command[1] = (to + i) >> 16;
- flash->command[2] = (to + i) >> 8;
- flash->command[3] = (to + i);
+ m25p_addr2cmd(flash, to + i, flash->command);
t[1].tx_buf = buf + i;
t[1].len = page_size;
spi_sync(flash->spi, &m);
if (retlen)
- *retlen += m.actual_length - CMD_SIZE;
+ *retlen += m.actual_length - m25p_cmdsz(flash);
}
}
memset(t, 0, (sizeof t));
t[0].tx_buf = flash->command;
- t[0].len = CMD_SIZE;
+ t[0].len = m25p_cmdsz(flash);
spi_message_add_tail(&t[0], &m);
t[1].tx_buf = buf;
/* Start write from odd address. */
if (actual) {
flash->command[0] = OPCODE_BP;
- flash->command[1] = to >> 16;
- flash->command[2] = to >> 8;
- flash->command[3] = to;
+ m25p_addr2cmd(flash, to, flash->command);
/* write one byte. */
t[1].len = 1;
ret = wait_till_ready(flash);
if (ret)
goto time_out;
- *retlen += m.actual_length - CMD_SIZE;
+ *retlen += m.actual_length - m25p_cmdsz(flash);
}
to += actual;
flash->command[0] = OPCODE_AAI_WP;
- flash->command[1] = to >> 16;
- flash->command[2] = to >> 8;
- flash->command[3] = to;
+ m25p_addr2cmd(flash, to, flash->command);
/* Write out most of the data here. */
- cmd_sz = CMD_SIZE;
+ cmd_sz = m25p_cmdsz(flash);
for (; actual < len - 1; actual += 2) {
t[0].len = cmd_sz;
/* write two bytes. */
if (actual != len) {
write_enable(flash);
flash->command[0] = OPCODE_BP;
- flash->command[1] = to >> 16;
- flash->command[2] = to >> 8;
- flash->command[3] = to;
- t[0].len = CMD_SIZE;
+ m25p_addr2cmd(flash, to, flash->command);
+ t[0].len = m25p_cmdsz(flash);
t[1].len = 1;
t[1].tx_buf = buf + actual;
ret = wait_till_ready(flash);
if (ret)
goto time_out;
- *retlen += m.actual_length - CMD_SIZE;
+ *retlen += m.actual_length - m25p_cmdsz(flash);
write_disable(flash);
}
*/
struct flash_info {
- char *name;
-
/* JEDEC id zero means "no ID" (most older chips); otherwise it has
* a high byte of zero plus three data bytes: the manufacturer id,
* then a two byte device id.
unsigned sector_size;
u16 n_sectors;
+ u16 page_size;
+ u16 addr_width;
+
u16 flags;
#define SECT_4K 0x01 /* OPCODE_BE_4K works uniformly */
+#define M25P_NO_ERASE 0x02 /* No erase command needed */
};
+#define INFO(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
+ ((kernel_ulong_t)&(struct flash_info) { \
+ .jedec_id = (_jedec_id), \
+ .ext_id = (_ext_id), \
+ .sector_size = (_sector_size), \
+ .n_sectors = (_n_sectors), \
+ .page_size = 256, \
+ .addr_width = 3, \
+ .flags = (_flags), \
+ })
+
+#define CAT25_INFO(_sector_size, _n_sectors, _page_size, _addr_width) \
+ ((kernel_ulong_t)&(struct flash_info) { \
+ .sector_size = (_sector_size), \
+ .n_sectors = (_n_sectors), \
+ .page_size = (_page_size), \
+ .addr_width = (_addr_width), \
+ .flags = M25P_NO_ERASE, \
+ })
/* NOTE: double check command sets and memory organization when you add
* more flash chips. This current list focusses on newer chips, which
* have been converging on command sets which including JEDEC ID.
*/
-static struct flash_info __devinitdata m25p_data [] = {
-
+static const struct spi_device_id m25p_ids[] = {
/* Atmel -- some are (confusingly) marketed as "DataFlash" */
- { "at25fs010", 0x1f6601, 0, 32 * 1024, 4, SECT_4K, },
- { "at25fs040", 0x1f6604, 0, 64 * 1024, 8, SECT_4K, },
+ { "at25fs010", INFO(0x1f6601, 0, 32 * 1024, 4, SECT_4K) },
+ { "at25fs040", INFO(0x1f6604, 0, 64 * 1024, 8, SECT_4K) },
- { "at25df041a", 0x1f4401, 0, 64 * 1024, 8, SECT_4K, },
- { "at25df641", 0x1f4800, 0, 64 * 1024, 128, SECT_4K, },
+ { "at25df041a", INFO(0x1f4401, 0, 64 * 1024, 8, SECT_4K) },
+ { "at25df641", INFO(0x1f4800, 0, 64 * 1024, 128, SECT_4K) },
- { "at26f004", 0x1f0400, 0, 64 * 1024, 8, SECT_4K, },
- { "at26df081a", 0x1f4501, 0, 64 * 1024, 16, SECT_4K, },
- { "at26df161a", 0x1f4601, 0, 64 * 1024, 32, SECT_4K, },
- { "at26df321", 0x1f4701, 0, 64 * 1024, 64, SECT_4K, },
+ { "at26f004", INFO(0x1f0400, 0, 64 * 1024, 8, SECT_4K) },
+ { "at26df081a", INFO(0x1f4501, 0, 64 * 1024, 16, SECT_4K) },
+ { "at26df161a", INFO(0x1f4601, 0, 64 * 1024, 32, SECT_4K) },
+ { "at26df321", INFO(0x1f4701, 0, 64 * 1024, 64, SECT_4K) },
/* Macronix */
- { "mx25l3205d", 0xc22016, 0, 64 * 1024, 64, },
- { "mx25l6405d", 0xc22017, 0, 64 * 1024, 128, },
- { "mx25l12805d", 0xc22018, 0, 64 * 1024, 256, },
- { "mx25l12855e", 0xc22618, 0, 64 * 1024, 256, },
+ { "mx25l4005a", INFO(0xc22013, 0, 64 * 1024, 8, SECT_4K) },
+ { "mx25l3205d", INFO(0xc22016, 0, 64 * 1024, 64, 0) },
+ { "mx25l6405d", INFO(0xc22017, 0, 64 * 1024, 128, 0) },
+ { "mx25l12805d", INFO(0xc22018, 0, 64 * 1024, 256, 0) },
+ { "mx25l12855e", INFO(0xc22618, 0, 64 * 1024, 256, 0) },
/* Spansion -- single (large) sector size only, at least
* for the chips listed here (without boot sectors).
*/
- { "s25sl004a", 0x010212, 0, 64 * 1024, 8, },
- { "s25sl008a", 0x010213, 0, 64 * 1024, 16, },
- { "s25sl016a", 0x010214, 0, 64 * 1024, 32, },
- { "s25sl032a", 0x010215, 0, 64 * 1024, 64, },
- { "s25sl064a", 0x010216, 0, 64 * 1024, 128, },
- { "s25sl12800", 0x012018, 0x0300, 256 * 1024, 64, },
- { "s25sl12801", 0x012018, 0x0301, 64 * 1024, 256, },
- { "s25fl129p0", 0x012018, 0x4d00, 256 * 1024, 64, },
- { "s25fl129p1", 0x012018, 0x4d01, 64 * 1024, 256, },
+ { "s25sl004a", INFO(0x010212, 0, 64 * 1024, 8, 0) },
+ { "s25sl008a", INFO(0x010213, 0, 64 * 1024, 16, 0) },
+ { "s25sl016a", INFO(0x010214, 0, 64 * 1024, 32, 0) },
+ { "s25sl032a", INFO(0x010215, 0, 64 * 1024, 64, 0) },
+ { "s25sl064a", INFO(0x010216, 0, 64 * 1024, 128, 0) },
+ { "s25sl12800", INFO(0x012018, 0x0300, 256 * 1024, 64, 0) },
+ { "s25sl12801", INFO(0x012018, 0x0301, 64 * 1024, 256, 0) },
+ { "s25fl129p0", INFO(0x012018, 0x4d00, 256 * 1024, 64, 0) },
+ { "s25fl129p1", INFO(0x012018, 0x4d01, 64 * 1024, 256, 0) },
/* SST -- large erase sizes are "overlays", "sectors" are 4K */
- { "sst25vf040b", 0xbf258d, 0, 64 * 1024, 8, SECT_4K, },
- { "sst25vf080b", 0xbf258e, 0, 64 * 1024, 16, SECT_4K, },
- { "sst25vf016b", 0xbf2541, 0, 64 * 1024, 32, SECT_4K, },
- { "sst25vf032b", 0xbf254a, 0, 64 * 1024, 64, SECT_4K, },
- { "sst25wf512", 0xbf2501, 0, 64 * 1024, 1, SECT_4K, },
- { "sst25wf010", 0xbf2502, 0, 64 * 1024, 2, SECT_4K, },
- { "sst25wf020", 0xbf2503, 0, 64 * 1024, 4, SECT_4K, },
- { "sst25wf040", 0xbf2504, 0, 64 * 1024, 8, SECT_4K, },
+ { "sst25vf040b", INFO(0xbf258d, 0, 64 * 1024, 8, SECT_4K) },
+ { "sst25vf080b", INFO(0xbf258e, 0, 64 * 1024, 16, SECT_4K) },
+ { "sst25vf016b", INFO(0xbf2541, 0, 64 * 1024, 32, SECT_4K) },
+ { "sst25vf032b", INFO(0xbf254a, 0, 64 * 1024, 64, SECT_4K) },
+ { "sst25wf512", INFO(0xbf2501, 0, 64 * 1024, 1, SECT_4K) },
+ { "sst25wf010", INFO(0xbf2502, 0, 64 * 1024, 2, SECT_4K) },
+ { "sst25wf020", INFO(0xbf2503, 0, 64 * 1024, 4, SECT_4K) },
+ { "sst25wf040", INFO(0xbf2504, 0, 64 * 1024, 8, SECT_4K) },
/* ST Microelectronics -- newer production may have feature updates */
- { "m25p05", 0x202010, 0, 32 * 1024, 2, },
- { "m25p10", 0x202011, 0, 32 * 1024, 4, },
- { "m25p20", 0x202012, 0, 64 * 1024, 4, },
- { "m25p40", 0x202013, 0, 64 * 1024, 8, },
- { "m25p80", 0, 0, 64 * 1024, 16, },
- { "m25p16", 0x202015, 0, 64 * 1024, 32, },
- { "m25p32", 0x202016, 0, 64 * 1024, 64, },
- { "m25p64", 0x202017, 0, 64 * 1024, 128, },
- { "m25p128", 0x202018, 0, 256 * 1024, 64, },
-
- { "m45pe10", 0x204011, 0, 64 * 1024, 2, },
- { "m45pe80", 0x204014, 0, 64 * 1024, 16, },
- { "m45pe16", 0x204015, 0, 64 * 1024, 32, },
-
- { "m25pe80", 0x208014, 0, 64 * 1024, 16, },
- { "m25pe16", 0x208015, 0, 64 * 1024, 32, SECT_4K, },
+ { "m25p05", INFO(0x202010, 0, 32 * 1024, 2, 0) },
+ { "m25p10", INFO(0x202011, 0, 32 * 1024, 4, 0) },
+ { "m25p20", INFO(0x202012, 0, 64 * 1024, 4, 0) },
+ { "m25p40", INFO(0x202013, 0, 64 * 1024, 8, 0) },
+ { "m25p80", INFO(0x202014, 0, 64 * 1024, 16, 0) },
+ { "m25p16", INFO(0x202015, 0, 64 * 1024, 32, 0) },
+ { "m25p32", INFO(0x202016, 0, 64 * 1024, 64, 0) },
+ { "m25p64", INFO(0x202017, 0, 64 * 1024, 128, 0) },
+ { "m25p128", INFO(0x202018, 0, 256 * 1024, 64, 0) },
+
+ { "m45pe10", INFO(0x204011, 0, 64 * 1024, 2, 0) },
+ { "m45pe80", INFO(0x204014, 0, 64 * 1024, 16, 0) },
+ { "m45pe16", INFO(0x204015, 0, 64 * 1024, 32, 0) },
+
+ { "m25pe80", INFO(0x208014, 0, 64 * 1024, 16, 0) },
+ { "m25pe16", INFO(0x208015, 0, 64 * 1024, 32, SECT_4K) },
/* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */
- { "w25x10", 0xef3011, 0, 64 * 1024, 2, SECT_4K, },
- { "w25x20", 0xef3012, 0, 64 * 1024, 4, SECT_4K, },
- { "w25x40", 0xef3013, 0, 64 * 1024, 8, SECT_4K, },
- { "w25x80", 0xef3014, 0, 64 * 1024, 16, SECT_4K, },
- { "w25x16", 0xef3015, 0, 64 * 1024, 32, SECT_4K, },
- { "w25x32", 0xef3016, 0, 64 * 1024, 64, SECT_4K, },
- { "w25x64", 0xef3017, 0, 64 * 1024, 128, SECT_4K, },
+ { "w25x10", INFO(0xef3011, 0, 64 * 1024, 2, SECT_4K) },
+ { "w25x20", INFO(0xef3012, 0, 64 * 1024, 4, SECT_4K) },
+ { "w25x40", INFO(0xef3013, 0, 64 * 1024, 8, SECT_4K) },
+ { "w25x80", INFO(0xef3014, 0, 64 * 1024, 16, SECT_4K) },
+ { "w25x16", INFO(0xef3015, 0, 64 * 1024, 32, SECT_4K) },
+ { "w25x32", INFO(0xef3016, 0, 64 * 1024, 64, SECT_4K) },
+ { "w25x64", INFO(0xef3017, 0, 64 * 1024, 128, SECT_4K) },
+
+ /* Catalyst / On Semiconductor -- non-JEDEC */
+ { "cat25c11", CAT25_INFO( 16, 8, 16, 1) },
+ { "cat25c03", CAT25_INFO( 32, 8, 16, 2) },
+ { "cat25c09", CAT25_INFO( 128, 8, 32, 2) },
+ { "cat25c17", CAT25_INFO( 256, 8, 32, 2) },
+ { "cat25128", CAT25_INFO(2048, 8, 64, 2) },
+ { },
};
+MODULE_DEVICE_TABLE(spi, m25p_ids);
-static struct flash_info *__devinit jedec_probe(struct spi_device *spi)
+static const struct spi_device_id *__devinit jedec_probe(struct spi_device *spi)
{
int tmp;
u8 code = OPCODE_RDID;
jedec = jedec << 8;
jedec |= id[2];
+ /*
+ * Some chips (like Numonyx M25P80) have JEDEC and non-JEDEC variants,
+ * which depend on technology process. Officially RDID command doesn't
+ * exist for non-JEDEC chips, but for compatibility they return ID 0.
+ */
+ if (jedec == 0)
+ return NULL;
+
ext_jedec = id[3] << 8 | id[4];
- for (tmp = 0, info = m25p_data;
- tmp < ARRAY_SIZE(m25p_data);
- tmp++, info++) {
+ for (tmp = 0; tmp < ARRAY_SIZE(m25p_ids) - 1; tmp++) {
+ info = (void *)m25p_ids[tmp].driver_data;
if (info->jedec_id == jedec) {
if (info->ext_id != 0 && info->ext_id != ext_jedec)
continue;
- return info;
+ return &m25p_ids[tmp];
}
}
- dev_err(&spi->dev, "unrecognized JEDEC id %06x\n", jedec);
return NULL;
}
*/
static int __devinit m25p_probe(struct spi_device *spi)
{
+ const struct spi_device_id *id = spi_get_device_id(spi);
struct flash_platform_data *data;
struct m25p *flash;
struct flash_info *info;
*/
data = spi->dev.platform_data;
if (data && data->type) {
- for (i = 0, info = m25p_data;
- i < ARRAY_SIZE(m25p_data);
- i++, info++) {
- if (strcmp(data->type, info->name) == 0)
- break;
- }
+ const struct spi_device_id *plat_id;
- /* unrecognized chip? */
- if (i == ARRAY_SIZE(m25p_data)) {
- DEBUG(MTD_DEBUG_LEVEL0, "%s: unrecognized id %s\n",
- dev_name(&spi->dev), data->type);
- info = NULL;
-
- /* recognized; is that chip really what's there? */
- } else if (info->jedec_id) {
- struct flash_info *chip = jedec_probe(spi);
-
- if (!chip || chip != info) {
- dev_warn(&spi->dev, "found %s, expected %s\n",
- chip ? chip->name : "UNKNOWN",
- info->name);
- info = NULL;
- }
+ for (i = 0; i < ARRAY_SIZE(m25p_ids) - 1; i++) {
+ plat_id = &m25p_ids[i];
+ if (strcmp(data->type, plat_id->name))
+ continue;
+ break;
}
- } else
- info = jedec_probe(spi);
- if (!info)
- return -ENODEV;
+ if (plat_id)
+ id = plat_id;
+ else
+ dev_warn(&spi->dev, "unrecognized id %s\n", data->type);
+ }
+
+ info = (void *)id->driver_data;
+
+ if (info->jedec_id) {
+ const struct spi_device_id *jid;
+
+ jid = jedec_probe(spi);
+ if (!jid) {
+ dev_info(&spi->dev, "non-JEDEC variant of %s\n",
+ id->name);
+ } else if (jid != id) {
+ /*
+ * JEDEC knows better, so overwrite platform ID. We
+ * can't trust partitions any longer, but we'll let
+ * mtd apply them anyway, since some partitions may be
+ * marked read-only, and we don't want to lose that
+ * information, even if it's not 100% accurate.
+ */
+ dev_warn(&spi->dev, "found %s, expected %s\n",
+ jid->name, id->name);
+ id = jid;
+ info = (void *)jid->driver_data;
+ }
+ }
flash = kzalloc(sizeof *flash, GFP_KERNEL);
if (!flash)
return -ENOMEM;
+ flash->command = kmalloc(MAX_CMD_SIZE + FAST_READ_DUMMY_BYTE, GFP_KERNEL);
+ if (!flash->command) {
+ kfree(flash);
+ return -ENOMEM;
+ }
flash->spi = spi;
mutex_init(&flash->lock);
dev_set_drvdata(&spi->dev, flash);
/*
- * Atmel serial flash tend to power up
- * with the software protection bits set
+ * Atmel and SST serial flash tend to power
+ * up with the software protection bits set
*/
- if (info->jedec_id >> 16 == 0x1f) {
+ if (info->jedec_id >> 16 == 0x1f ||
+ info->jedec_id >> 16 == 0xbf) {
write_enable(flash);
write_sr(flash, 0);
}
flash->mtd.erasesize = info->sector_size;
}
+ if (info->flags & M25P_NO_ERASE)
+ flash->mtd.flags |= MTD_NO_ERASE;
+
flash->mtd.dev.parent = &spi->dev;
+ flash->page_size = info->page_size;
+ flash->addr_width = info->addr_width;
- dev_info(&spi->dev, "%s (%lld Kbytes)\n", info->name,
+ dev_info(&spi->dev, "%s (%lld Kbytes)\n", id->name,
(long long)flash->mtd.size >> 10);
DEBUG(MTD_DEBUG_LEVEL2,
status = del_mtd_partitions(&flash->mtd);
else
status = del_mtd_device(&flash->mtd);
- if (status == 0)
+ if (status == 0) {
+ kfree(flash->command);
kfree(flash);
+ }
return 0;
}
.bus = &spi_bus_type,
.owner = THIS_MODULE,
},
+ .id_table = m25p_ids,
.probe = m25p_probe,
.remove = __devexit_p(m25p_remove),
struct mtd_info *device;
struct flash_platform_data *pdata = spi->dev.platform_data;
char *otp_tag = "";
+ int err = 0;
priv = kzalloc(sizeof *priv, GFP_KERNEL);
if (!priv)
if (nr_parts > 0) {
priv->partitioned = 1;
- return add_mtd_partitions(device, parts, nr_parts);
+ err = add_mtd_partitions(device, parts, nr_parts);
+ goto out;
}
} else if (pdata && pdata->nr_parts)
dev_warn(&spi->dev, "ignoring %d default partitions on %s\n",
pdata->nr_parts, device->name);
- return add_mtd_device(device) == 1 ? -ENODEV : 0;
+ if (add_mtd_device(device) == 1)
+ err = -ENODEV;
+
+out:
+ if (!err)
+ return 0;
+
+ dev_set_drvdata(&spi->dev, NULL);
+ kfree(priv);
+ return err;
}
static inline int __devinit
status = del_mtd_partitions(&flash->mtd);
else
status = del_mtd_device(&flash->mtd);
- if (status == 0)
+ if (status == 0) {
+ dev_set_drvdata(&spi->dev, NULL);
kfree(flash);
+ }
return status;
}
the SA1100 and SA1110, including the Assabet and the Compaq iPAQ.
If you have such a board, say 'Y'.
-config MTD_IPAQ
- tristate "CFI Flash device mapped on Compaq/HP iPAQ"
- depends on IPAQ_HANDHELD && MTD_CFI
- help
- This provides a driver for the on-board flash of the iPAQ.
-
config MTD_DC21285
tristate "CFI Flash device mapped on DC21285 Footbridge"
depends on MTD_CFI && ARCH_FOOTBRIDGE && MTD_COMPLEX_MAPPINGS
obj-$(CONFIG_MTD_OCTAGON) += octagon-5066.o
obj-$(CONFIG_MTD_PHYSMAP) += physmap.o
obj-$(CONFIG_MTD_PHYSMAP_OF) += physmap_of.o
+obj-$(CONFIG_MTD_PISMO) += pismo.o
obj-$(CONFIG_MTD_PMC_MSP_EVM) += pmcmsp-flash.o
obj-$(CONFIG_MTD_PCMCIA) += pcmciamtd.o
obj-$(CONFIG_MTD_RPXLITE) += rpxlite.o
obj-$(CONFIG_MTD_TQM8XXL) += tqm8xxl.o
obj-$(CONFIG_MTD_SA1100) += sa1100-flash.o
-obj-$(CONFIG_MTD_IPAQ) += ipaq-flash.o
obj-$(CONFIG_MTD_SBC_GXX) += sbc_gxx.o
obj-$(CONFIG_MTD_SC520CDP) += sc520cdp.o
obj-$(CONFIG_MTD_NETSC520) += netsc520.o
+++ /dev/null
-/*
- * Flash memory access on iPAQ Handhelds (either SA1100 or PXA250 based)
- *
- * (C) 2000 Nicolas Pitre <nico@fluxnic.net>
- * (C) 2002 Hewlett-Packard Company <jamey.hicks@hp.com>
- * (C) 2003 Christian Pellegrin <chri@ascensit.com>, <chri@infis.univ.ts.it>: concatenation of multiple flashes
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/spinlock.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <asm/page.h>
-#include <asm/mach-types.h>
-#include <asm/system.h>
-#include <asm/errno.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/map.h>
-#include <linux/mtd/partitions.h>
-#ifdef CONFIG_MTD_CONCAT
-#include <linux/mtd/concat.h>
-#endif
-
-#include <mach/hardware.h>
-#include <mach/h3600.h>
-#include <asm/io.h>
-
-
-#ifndef CONFIG_IPAQ_HANDHELD
-#error This is for iPAQ Handhelds only
-#endif
-#ifdef CONFIG_SA1100_JORNADA56X
-
-static void jornada56x_set_vpp(struct map_info *map, int vpp)
-{
- if (vpp)
- GPSR = GPIO_GPIO26;
- else
- GPCR = GPIO_GPIO26;
- GPDR |= GPIO_GPIO26;
-}
-
-#endif
-
-#ifdef CONFIG_SA1100_JORNADA720
-
-static void jornada720_set_vpp(struct map_info *map, int vpp)
-{
- if (vpp)
- PPSR |= 0x80;
- else
- PPSR &= ~0x80;
- PPDR |= 0x80;
-}
-
-#endif
-
-#define MAX_IPAQ_CS 2 /* Number of CS we are going to test */
-
-#define IPAQ_MAP_INIT(X) \
- { \
- name: "IPAQ flash " X, \
- }
-
-
-static struct map_info ipaq_map[MAX_IPAQ_CS] = {
- IPAQ_MAP_INIT("bank 1"),
- IPAQ_MAP_INIT("bank 2")
-};
-
-static struct mtd_info *my_sub_mtd[MAX_IPAQ_CS] = {
- NULL,
- NULL
-};
-
-/*
- * Here are partition information for all known IPAQ-based devices.
- * See include/linux/mtd/partitions.h for definition of the mtd_partition
- * structure.
- *
- * The *_max_flash_size is the maximum possible mapped flash size which
- * is not necessarily the actual flash size. It must be no more than
- * the value specified in the "struct map_desc *_io_desc" mapping
- * definition for the corresponding machine.
- *
- * Please keep these in alphabetical order, and formatted as per existing
- * entries. Thanks.
- */
-
-#ifdef CONFIG_IPAQ_HANDHELD
-static unsigned long h3xxx_max_flash_size = 0x04000000;
-static struct mtd_partition h3xxx_partitions[] = {
- {
- name: "H3XXX boot firmware",
-#ifndef CONFIG_LAB
- size: 0x00040000,
-#else
- size: 0x00080000,
-#endif
- offset: 0,
-#ifndef CONFIG_LAB
- mask_flags: MTD_WRITEABLE, /* force read-only */
-#endif
- },
- {
- name: "H3XXX root jffs2",
-#ifndef CONFIG_LAB
- size: 0x2000000 - 2*0x40000, /* Warning, this is fixed later */
- offset: 0x00040000,
-#else
- size: 0x2000000 - 0x40000 - 0x80000, /* Warning, this is fixed later */
- offset: 0x00080000,
-#endif
- },
- {
- name: "asset",
- size: 0x40000,
- offset: 0x2000000 - 0x40000, /* Warning, this is fixed later */
- mask_flags: MTD_WRITEABLE, /* force read-only */
- }
-};
-
-#ifndef CONFIG_MTD_CONCAT
-static struct mtd_partition h3xxx_partitions_bank2[] = {
- /* this is used only on 2 CS machines when concat is not present */
- {
- name: "second H3XXX root jffs2",
- size: 0x1000000 - 0x40000, /* Warning, this is fixed later */
- offset: 0x00000000,
- },
- {
- name: "second asset",
- size: 0x40000,
- offset: 0x1000000 - 0x40000, /* Warning, this is fixed later */
- mask_flags: MTD_WRITEABLE, /* force read-only */
- }
-};
-#endif
-
-static DEFINE_SPINLOCK(ipaq_vpp_lock);
-
-static void h3xxx_set_vpp(struct map_info *map, int vpp)
-{
- static int nest = 0;
-
- spin_lock(&ipaq_vpp_lock);
- if (vpp)
- nest++;
- else
- nest--;
- if (nest)
- assign_h3600_egpio(IPAQ_EGPIO_VPP_ON, 1);
- else
- assign_h3600_egpio(IPAQ_EGPIO_VPP_ON, 0);
- spin_unlock(&ipaq_vpp_lock);
-}
-
-#endif
-
-#if defined(CONFIG_SA1100_JORNADA56X) || defined(CONFIG_SA1100_JORNADA720)
-static unsigned long jornada_max_flash_size = 0x02000000;
-static struct mtd_partition jornada_partitions[] = {
- {
- name: "Jornada boot firmware",
- size: 0x00040000,
- offset: 0,
- mask_flags: MTD_WRITEABLE, /* force read-only */
- }, {
- name: "Jornada root jffs2",
- size: MTDPART_SIZ_FULL,
- offset: 0x00040000,
- }
-};
-#endif
-
-
-static struct mtd_partition *parsed_parts;
-static struct mtd_info *mymtd;
-
-static unsigned long cs_phys[] = {
-#ifdef CONFIG_ARCH_SA1100
- SA1100_CS0_PHYS,
- SA1100_CS1_PHYS,
- SA1100_CS2_PHYS,
- SA1100_CS3_PHYS,
- SA1100_CS4_PHYS,
- SA1100_CS5_PHYS,
-#else
- PXA_CS0_PHYS,
- PXA_CS1_PHYS,
- PXA_CS2_PHYS,
- PXA_CS3_PHYS,
- PXA_CS4_PHYS,
- PXA_CS5_PHYS,
-#endif
-};
-
-static const char *part_probes[] = { "cmdlinepart", "RedBoot", NULL };
-
-static int __init h1900_special_case(void);
-
-static int __init ipaq_mtd_init(void)
-{
- struct mtd_partition *parts = NULL;
- int nb_parts = 0;
- int parsed_nr_parts = 0;
- const char *part_type;
- int i; /* used when we have >1 flash chips */
- unsigned long tot_flashsize = 0; /* used when we have >1 flash chips */
-
- /* Default flash bankwidth */
- // ipaq_map.bankwidth = (MSC0 & MSC_RBW) ? 2 : 4;
-
- if (machine_is_h1900())
- {
- /* For our intents, the h1900 is not a real iPAQ, so we special-case it. */
- return h1900_special_case();
- }
-
- if (machine_is_h3100() || machine_is_h1900())
- for(i=0; i<MAX_IPAQ_CS; i++)
- ipaq_map[i].bankwidth = 2;
- else
- for(i=0; i<MAX_IPAQ_CS; i++)
- ipaq_map[i].bankwidth = 4;
-
- /*
- * Static partition definition selection
- */
- part_type = "static";
-
- simple_map_init(&ipaq_map[0]);
- simple_map_init(&ipaq_map[1]);
-
-#ifdef CONFIG_IPAQ_HANDHELD
- if (machine_is_ipaq()) {
- parts = h3xxx_partitions;
- nb_parts = ARRAY_SIZE(h3xxx_partitions);
- for(i=0; i<MAX_IPAQ_CS; i++) {
- ipaq_map[i].size = h3xxx_max_flash_size;
- ipaq_map[i].set_vpp = h3xxx_set_vpp;
- ipaq_map[i].phys = cs_phys[i];
- ipaq_map[i].virt = ioremap(cs_phys[i], 0x04000000);
- if (machine_is_h3100 () || machine_is_h1900())
- ipaq_map[i].bankwidth = 2;
- }
- if (machine_is_h3600()) {
- /* No asset partition here */
- h3xxx_partitions[1].size += 0x40000;
- nb_parts--;
- }
- }
-#endif
-#ifdef CONFIG_ARCH_H5400
- if (machine_is_h5400()) {
- ipaq_map[0].size = 0x02000000;
- ipaq_map[1].size = 0x02000000;
- ipaq_map[1].phys = 0x02000000;
- ipaq_map[1].virt = ipaq_map[0].virt + 0x02000000;
- }
-#endif
-#ifdef CONFIG_ARCH_H1900
- if (machine_is_h1900()) {
- ipaq_map[0].size = 0x00400000;
- ipaq_map[1].size = 0x02000000;
- ipaq_map[1].phys = 0x00080000;
- ipaq_map[1].virt = ipaq_map[0].virt + 0x00080000;
- }
-#endif
-
-#ifdef CONFIG_SA1100_JORNADA56X
- if (machine_is_jornada56x()) {
- parts = jornada_partitions;
- nb_parts = ARRAY_SIZE(jornada_partitions);
- ipaq_map[0].size = jornada_max_flash_size;
- ipaq_map[0].set_vpp = jornada56x_set_vpp;
- ipaq_map[0].virt = (__u32)ioremap(0x0, 0x04000000);
- }
-#endif
-#ifdef CONFIG_SA1100_JORNADA720
- if (machine_is_jornada720()) {
- parts = jornada_partitions;
- nb_parts = ARRAY_SIZE(jornada_partitions);
- ipaq_map[0].size = jornada_max_flash_size;
- ipaq_map[0].set_vpp = jornada720_set_vpp;
- }
-#endif
-
-
- if (machine_is_ipaq()) { /* for iPAQs only */
- for(i=0; i<MAX_IPAQ_CS; i++) {
- printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with CFI.\n", ipaq_map[i].bankwidth*8, ipaq_map[i].virt);
- my_sub_mtd[i] = do_map_probe("cfi_probe", &ipaq_map[i]);
- if (!my_sub_mtd[i]) {
- printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with JEDEC.\n", ipaq_map[i].bankwidth*8, ipaq_map[i].virt);
- my_sub_mtd[i] = do_map_probe("jedec_probe", &ipaq_map[i]);
- }
- if (!my_sub_mtd[i]) {
- printk(KERN_NOTICE "iPAQ flash: failed to find flash.\n");
- if (i)
- break;
- else
- return -ENXIO;
- } else
- printk(KERN_NOTICE "iPAQ flash: found %d bytes\n", my_sub_mtd[i]->size);
-
- /* do we really need this debugging? --joshua 20030703 */
- // printk("my_sub_mtd[%d]=%p\n", i, my_sub_mtd[i]);
- my_sub_mtd[i]->owner = THIS_MODULE;
- tot_flashsize += my_sub_mtd[i]->size;
- }
-#ifdef CONFIG_MTD_CONCAT
- /* fix the asset location */
-# ifdef CONFIG_LAB
- h3xxx_partitions[1].size = tot_flashsize - 0x40000 - 0x80000 /* extra big boot block */;
-# else
- h3xxx_partitions[1].size = tot_flashsize - 2 * 0x40000;
-# endif
- h3xxx_partitions[2].offset = tot_flashsize - 0x40000;
- /* and concat the devices */
- mymtd = mtd_concat_create(&my_sub_mtd[0], i,
- "ipaq");
- if (!mymtd) {
- printk("Cannot create iPAQ concat device\n");
- return -ENXIO;
- }
-#else
- mymtd = my_sub_mtd[0];
-
- /*
- *In the very near future, command line partition parsing
- * will use the device name as 'mtd-id' instead of a value
- * passed to the parse_cmdline_partitions() routine. Since
- * the bootldr says 'ipaq', make sure it continues to work.
- */
- mymtd->name = "ipaq";
-
- if ((machine_is_h3600())) {
-# ifdef CONFIG_LAB
- h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x80000;
-# else
- h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x40000;
-# endif
- nb_parts = 2;
- } else {
-# ifdef CONFIG_LAB
- h3xxx_partitions[1].size = my_sub_mtd[0]->size - 0x40000 - 0x80000; /* extra big boot block */
-# else
- h3xxx_partitions[1].size = my_sub_mtd[0]->size - 2*0x40000;
-# endif
- h3xxx_partitions[2].offset = my_sub_mtd[0]->size - 0x40000;
- }
-
- if (my_sub_mtd[1]) {
-# ifdef CONFIG_LAB
- h3xxx_partitions_bank2[0].size = my_sub_mtd[1]->size - 0x80000;
-# else
- h3xxx_partitions_bank2[0].size = my_sub_mtd[1]->size - 0x40000;
-# endif
- h3xxx_partitions_bank2[1].offset = my_sub_mtd[1]->size - 0x40000;
- }
-#endif
- }
- else {
- /*
- * Now let's probe for the actual flash. Do it here since
- * specific machine settings might have been set above.
- */
- printk(KERN_NOTICE "IPAQ flash: probing %d-bit flash bus, window=%lx\n", ipaq_map[0].bankwidth*8, ipaq_map[0].virt);
- mymtd = do_map_probe("cfi_probe", &ipaq_map[0]);
- if (!mymtd)
- return -ENXIO;
- mymtd->owner = THIS_MODULE;
- }
-
-
- /*
- * Dynamic partition selection stuff (might override the static ones)
- */
-
- i = parse_mtd_partitions(mymtd, part_probes, &parsed_parts, 0);
-
- if (i > 0) {
- nb_parts = parsed_nr_parts = i;
- parts = parsed_parts;
- part_type = "dynamic";
- }
-
- if (!parts) {
- printk(KERN_NOTICE "IPAQ flash: no partition info available, registering whole flash at once\n");
- add_mtd_device(mymtd);
-#ifndef CONFIG_MTD_CONCAT
- if (my_sub_mtd[1])
- add_mtd_device(my_sub_mtd[1]);
-#endif
- } else {
- printk(KERN_NOTICE "Using %s partition definition\n", part_type);
- add_mtd_partitions(mymtd, parts, nb_parts);
-#ifndef CONFIG_MTD_CONCAT
- if (my_sub_mtd[1])
- add_mtd_partitions(my_sub_mtd[1], h3xxx_partitions_bank2, ARRAY_SIZE(h3xxx_partitions_bank2));
-#endif
- }
-
- return 0;
-}
-
-static void __exit ipaq_mtd_cleanup(void)
-{
- int i;
-
- if (mymtd) {
- del_mtd_partitions(mymtd);
-#ifndef CONFIG_MTD_CONCAT
- if (my_sub_mtd[1])
- del_mtd_partitions(my_sub_mtd[1]);
-#endif
- map_destroy(mymtd);
-#ifdef CONFIG_MTD_CONCAT
- for(i=0; i<MAX_IPAQ_CS; i++)
-#else
- for(i=1; i<MAX_IPAQ_CS; i++)
-#endif
- {
- if (my_sub_mtd[i])
- map_destroy(my_sub_mtd[i]);
- }
- kfree(parsed_parts);
- }
-}
-
-static int __init h1900_special_case(void)
-{
- /* The iPAQ h1900 is a special case - it has weird ROM. */
- simple_map_init(&ipaq_map[0]);
- ipaq_map[0].size = 0x80000;
- ipaq_map[0].set_vpp = h3xxx_set_vpp;
- ipaq_map[0].phys = 0x0;
- ipaq_map[0].virt = ioremap(0x0, 0x04000000);
- ipaq_map[0].bankwidth = 2;
-
- printk(KERN_NOTICE "iPAQ flash: probing %d-bit flash bus, window=%lx with JEDEC.\n", ipaq_map[0].bankwidth*8, ipaq_map[0].virt);
- mymtd = do_map_probe("jedec_probe", &ipaq_map[0]);
- if (!mymtd)
- return -ENODEV;
- add_mtd_device(mymtd);
- printk(KERN_NOTICE "iPAQ flash: registered h1910 flash\n");
-
- return 0;
-}
-
-module_init(ipaq_mtd_init);
-module_exit(ipaq_mtd_cleanup);
-
-MODULE_AUTHOR("Jamey Hicks");
-MODULE_DESCRIPTION("IPAQ CFI map driver");
-MODULE_LICENSE("MIT");
* not attempt to do a direct access on us.
*/
info->map.phys = NO_XIP;
- info->map.size = dev->resource->end - dev->resource->start + 1;
+ info->map.size = resource_size(dev->resource);
/*
* We only support 16-bit accesses for now. If and when
info->map.copy_from = ixp4xx_copy_from,
info->res = request_mem_region(dev->resource->start,
- dev->resource->end - dev->resource->start + 1,
+ resource_size(dev->resource),
"IXP4XXFlash");
if (!info->res) {
printk(KERN_ERR "IXP4XXFlash: Could not reserve memory region\n");
}
info->map.virt = ioremap(dev->resource->start,
- dev->resource->end - dev->resource->start + 1);
+ resource_size(dev->resource));
if (!info->map.virt) {
printk(KERN_ERR "IXP4XXFlash: Failed to ioremap region\n");
err = -EIO;
if (info->cmtd) {
#ifdef CONFIG_MTD_PARTITIONS
- if (info->nr_parts || physmap_data->nr_parts)
+ if (info->nr_parts || physmap_data->nr_parts) {
del_mtd_partitions(info->cmtd);
- else
+
+ if (info->nr_parts)
+ kfree(info->parts);
+ } else {
del_mtd_device(info->cmtd);
+ }
#else
del_mtd_device(info->cmtd);
#endif
- }
-#ifdef CONFIG_MTD_PARTITIONS
- if (info->nr_parts)
- kfree(info->parts);
-#endif
-
#ifdef CONFIG_MTD_CONCAT
- if (info->cmtd != info->mtd[0])
- mtd_concat_destroy(info->cmtd);
+ if (info->cmtd != info->mtd[0])
+ mtd_concat_destroy(info->cmtd);
#endif
+ }
for (i = 0; i < MAX_RESOURCES; i++) {
if (info->mtd[i] != NULL)
info->map[i].size);
if (info->map[i].virt == NULL) {
dev_err(&dev->dev, "Failed to ioremap flash region\n");
- err = EIO;
+ err = -EIO;
goto err_out;
}
plat->exit();
}
-static struct sa_info *__init
+static struct sa_info *__devinit
sa1100_setup_mtd(struct platform_device *pdev, struct flash_platform_data *plat)
{
struct sa_info *info;
test_flash_data = be32_to_cpu(mdev->devinfo.function);
/* Need to count how many bits are set - to find out which
- * function_data element has details of the memory card:
- * using Brian Kernighan's/Peter Wegner's method */
- for (c = 0; test_flash_data; c++)
- test_flash_data &= test_flash_data - 1;
+ * function_data element has details of the memory card
+ */
+ c = hweight_long(test_flash_data);
basic_flash_data = be32_to_cpu(mdev->devinfo.function_data[c - 1]);
card = kmalloc(sizeof(struct memcard), GFP_KERNEL);
if (!card) {
- error = ENOMEM;
+ error = -ENOMEM;
goto fail_nomem;
}
struct request_queue *rq = tr->blkcore_priv->rq;
struct request *req = NULL;
- /* we might get involved when memory gets low, so use PF_MEMALLOC */
- current->flags |= PF_MEMALLOC;
-
spin_lock_irq(rq->queue_lock);
while (!kthread_should_stop()) {
tr->blkcore_priv->thread = kthread_run(mtd_blktrans_thread, tr,
"%sd", tr->name);
if (IS_ERR(tr->blkcore_priv->thread)) {
- int ret = PTR_ERR(tr->blkcore_priv->thread);
+ ret = PTR_ERR(tr->blkcore_priv->thread);
blk_cleanup_queue(tr->blkcore_priv->rq);
unregister_blkdev(tr->major, tr->name);
kfree(tr->blkcore_priv);
for (i=0; i< MAX_MTD_DEVICES; i++)
if (mtd_table[i] == mtd)
ret = mtd_table[i];
- } else if (num < MAX_MTD_DEVICES) {
+ } else if (num >= 0 && num < MAX_MTD_DEVICES) {
ret = mtd_table[num];
if (mtd && mtd != ret)
ret = NULL;
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/delay.h>
-#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/mtd/mtd.h>
+#include <linux/kmsg_dump.h>
+
+/* Maximum MTD partition size */
+#define MTDOOPS_MAX_MTD_SIZE (8 * 1024 * 1024)
#define MTDOOPS_KERNMSG_MAGIC 0x5d005d00
-#define OOPS_PAGE_SIZE 4096
+#define MTDOOPS_HEADER_SIZE 8
+
+static unsigned long record_size = 4096;
+module_param(record_size, ulong, 0400);
+MODULE_PARM_DESC(record_size,
+ "record size for MTD OOPS pages in bytes (default 4096)");
+
+static char mtddev[80];
+module_param_string(mtddev, mtddev, 80, 0400);
+MODULE_PARM_DESC(mtddev,
+ "name or index number of the MTD device to use");
+
+static int dump_oops = 1;
+module_param(dump_oops, int, 0600);
+MODULE_PARM_DESC(dump_oops,
+ "set to 1 to dump oopses, 0 to only dump panics (default 1)");
static struct mtdoops_context {
+ struct kmsg_dumper dump;
+
int mtd_index;
struct work_struct work_erase;
struct work_struct work_write;
int oops_pages;
int nextpage;
int nextcount;
- char *name;
+ unsigned long *oops_page_used;
void *oops_buf;
-
- /* writecount and disabling ready are spin lock protected */
- spinlock_t writecount_lock;
- int ready;
- int writecount;
} oops_cxt;
+static void mark_page_used(struct mtdoops_context *cxt, int page)
+{
+ set_bit(page, cxt->oops_page_used);
+}
+
+static void mark_page_unused(struct mtdoops_context *cxt, int page)
+{
+ clear_bit(page, cxt->oops_page_used);
+}
+
+static int page_is_used(struct mtdoops_context *cxt, int page)
+{
+ return test_bit(page, cxt->oops_page_used);
+}
+
static void mtdoops_erase_callback(struct erase_info *done)
{
wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv;
wake_up(wait_q);
}
-static int mtdoops_erase_block(struct mtd_info *mtd, int offset)
+static int mtdoops_erase_block(struct mtdoops_context *cxt, int offset)
{
+ struct mtd_info *mtd = cxt->mtd;
+ u32 start_page_offset = mtd_div_by_eb(offset, mtd) * mtd->erasesize;
+ u32 start_page = start_page_offset / record_size;
+ u32 erase_pages = mtd->erasesize / record_size;
struct erase_info erase;
DECLARE_WAITQUEUE(wait, current);
wait_queue_head_t wait_q;
int ret;
+ int page;
init_waitqueue_head(&wait_q);
erase.mtd = mtd;
if (ret) {
set_current_state(TASK_RUNNING);
remove_wait_queue(&wait_q, &wait);
- printk (KERN_WARNING "mtdoops: erase of region [0x%llx, 0x%llx] "
- "on \"%s\" failed\n",
- (unsigned long long)erase.addr, (unsigned long long)erase.len, mtd->name);
+ printk(KERN_WARNING "mtdoops: erase of region [0x%llx, 0x%llx] on \"%s\" failed\n",
+ (unsigned long long)erase.addr,
+ (unsigned long long)erase.len, mtddev);
return ret;
}
schedule(); /* Wait for erase to finish. */
remove_wait_queue(&wait_q, &wait);
+ /* Mark pages as unused */
+ for (page = start_page; page < start_page + erase_pages; page++)
+ mark_page_unused(cxt, page);
+
return 0;
}
static void mtdoops_inc_counter(struct mtdoops_context *cxt)
{
- struct mtd_info *mtd = cxt->mtd;
- size_t retlen;
- u32 count;
- int ret;
-
cxt->nextpage++;
if (cxt->nextpage >= cxt->oops_pages)
cxt->nextpage = 0;
if (cxt->nextcount == 0xffffffff)
cxt->nextcount = 0;
- ret = mtd->read(mtd, cxt->nextpage * OOPS_PAGE_SIZE, 4,
- &retlen, (u_char *) &count);
- if ((retlen != 4) || ((ret < 0) && (ret != -EUCLEAN))) {
- printk(KERN_ERR "mtdoops: Read failure at %d (%td of 4 read)"
- ", err %d.\n", cxt->nextpage * OOPS_PAGE_SIZE,
- retlen, ret);
+ if (page_is_used(cxt, cxt->nextpage)) {
schedule_work(&cxt->work_erase);
return;
}
- /* See if we need to erase the next block */
- if (count != 0xffffffff) {
- schedule_work(&cxt->work_erase);
- return;
- }
-
- printk(KERN_DEBUG "mtdoops: Ready %d, %d (no erase)\n",
- cxt->nextpage, cxt->nextcount);
- cxt->ready = 1;
+ printk(KERN_DEBUG "mtdoops: ready %d, %d (no erase)\n",
+ cxt->nextpage, cxt->nextcount);
}
/* Scheduled work - when we can't proceed without erasing a block */
if (!mtd)
return;
- mod = (cxt->nextpage * OOPS_PAGE_SIZE) % mtd->erasesize;
+ mod = (cxt->nextpage * record_size) % mtd->erasesize;
if (mod != 0) {
- cxt->nextpage = cxt->nextpage + ((mtd->erasesize - mod) / OOPS_PAGE_SIZE);
+ cxt->nextpage = cxt->nextpage + ((mtd->erasesize - mod) / record_size);
if (cxt->nextpage >= cxt->oops_pages)
cxt->nextpage = 0;
}
while (mtd->block_isbad) {
- ret = mtd->block_isbad(mtd, cxt->nextpage * OOPS_PAGE_SIZE);
+ ret = mtd->block_isbad(mtd, cxt->nextpage * record_size);
if (!ret)
break;
if (ret < 0) {
- printk(KERN_ERR "mtdoops: block_isbad failed, aborting.\n");
+ printk(KERN_ERR "mtdoops: block_isbad failed, aborting\n");
return;
}
badblock:
- printk(KERN_WARNING "mtdoops: Bad block at %08x\n",
- cxt->nextpage * OOPS_PAGE_SIZE);
+ printk(KERN_WARNING "mtdoops: bad block at %08lx\n",
+ cxt->nextpage * record_size);
i++;
- cxt->nextpage = cxt->nextpage + (mtd->erasesize / OOPS_PAGE_SIZE);
+ cxt->nextpage = cxt->nextpage + (mtd->erasesize / record_size);
if (cxt->nextpage >= cxt->oops_pages)
cxt->nextpage = 0;
- if (i == (cxt->oops_pages / (mtd->erasesize / OOPS_PAGE_SIZE))) {
- printk(KERN_ERR "mtdoops: All blocks bad!\n");
+ if (i == cxt->oops_pages / (mtd->erasesize / record_size)) {
+ printk(KERN_ERR "mtdoops: all blocks bad!\n");
return;
}
}
for (j = 0, ret = -1; (j < 3) && (ret < 0); j++)
- ret = mtdoops_erase_block(mtd, cxt->nextpage * OOPS_PAGE_SIZE);
+ ret = mtdoops_erase_block(cxt, cxt->nextpage * record_size);
if (ret >= 0) {
- printk(KERN_DEBUG "mtdoops: Ready %d, %d \n", cxt->nextpage, cxt->nextcount);
- cxt->ready = 1;
+ printk(KERN_DEBUG "mtdoops: ready %d, %d\n",
+ cxt->nextpage, cxt->nextcount);
return;
}
- if (mtd->block_markbad && (ret == -EIO)) {
- ret = mtd->block_markbad(mtd, cxt->nextpage * OOPS_PAGE_SIZE);
+ if (mtd->block_markbad && ret == -EIO) {
+ ret = mtd->block_markbad(mtd, cxt->nextpage * record_size);
if (ret < 0) {
- printk(KERN_ERR "mtdoops: block_markbad failed, aborting.\n");
+ printk(KERN_ERR "mtdoops: block_markbad failed, aborting\n");
return;
}
}
{
struct mtd_info *mtd = cxt->mtd;
size_t retlen;
+ u32 *hdr;
int ret;
- if (cxt->writecount < OOPS_PAGE_SIZE)
- memset(cxt->oops_buf + cxt->writecount, 0xff,
- OOPS_PAGE_SIZE - cxt->writecount);
+ /* Add mtdoops header to the buffer */
+ hdr = cxt->oops_buf;
+ hdr[0] = cxt->nextcount;
+ hdr[1] = MTDOOPS_KERNMSG_MAGIC;
if (panic)
- ret = mtd->panic_write(mtd, cxt->nextpage * OOPS_PAGE_SIZE,
- OOPS_PAGE_SIZE, &retlen, cxt->oops_buf);
+ ret = mtd->panic_write(mtd, cxt->nextpage * record_size,
+ record_size, &retlen, cxt->oops_buf);
else
- ret = mtd->write(mtd, cxt->nextpage * OOPS_PAGE_SIZE,
- OOPS_PAGE_SIZE, &retlen, cxt->oops_buf);
-
- cxt->writecount = 0;
+ ret = mtd->write(mtd, cxt->nextpage * record_size,
+ record_size, &retlen, cxt->oops_buf);
- if ((retlen != OOPS_PAGE_SIZE) || (ret < 0))
- printk(KERN_ERR "mtdoops: Write failure at %d (%td of %d written), err %d.\n",
- cxt->nextpage * OOPS_PAGE_SIZE, retlen, OOPS_PAGE_SIZE, ret);
+ if (retlen != record_size || ret < 0)
+ printk(KERN_ERR "mtdoops: write failure at %ld (%td of %ld written), error %d\n",
+ cxt->nextpage * record_size, retlen, record_size, ret);
+ mark_page_used(cxt, cxt->nextpage);
+ memset(cxt->oops_buf, 0xff, record_size);
mtdoops_inc_counter(cxt);
}
-
static void mtdoops_workfunc_write(struct work_struct *work)
{
struct mtdoops_context *cxt =
container_of(work, struct mtdoops_context, work_write);
mtdoops_write(cxt, 0);
-}
+}
static void find_next_position(struct mtdoops_context *cxt)
{
size_t retlen;
for (page = 0; page < cxt->oops_pages; page++) {
- ret = mtd->read(mtd, page * OOPS_PAGE_SIZE, 8, &retlen, (u_char *) &count[0]);
- if ((retlen != 8) || ((ret < 0) && (ret != -EUCLEAN))) {
- printk(KERN_ERR "mtdoops: Read failure at %d (%td of 8 read)"
- ", err %d.\n", page * OOPS_PAGE_SIZE, retlen, ret);
+ /* Assume the page is used */
+ mark_page_used(cxt, page);
+ ret = mtd->read(mtd, page * record_size, MTDOOPS_HEADER_SIZE,
+ &retlen, (u_char *) &count[0]);
+ if (retlen != MTDOOPS_HEADER_SIZE ||
+ (ret < 0 && ret != -EUCLEAN)) {
+ printk(KERN_ERR "mtdoops: read failure at %ld (%td of %d read), err %d\n",
+ page * record_size, retlen,
+ MTDOOPS_HEADER_SIZE, ret);
continue;
}
- if (count[1] != MTDOOPS_KERNMSG_MAGIC)
- continue;
+ if (count[0] == 0xffffffff && count[1] == 0xffffffff)
+ mark_page_unused(cxt, page);
if (count[0] == 0xffffffff)
continue;
if (maxcount == 0xffffffff) {
maxcount = count[0];
maxpos = page;
- } else if ((count[0] < 0x40000000) && (maxcount > 0xc0000000)) {
+ } else if (count[0] < 0x40000000 && maxcount > 0xc0000000) {
maxcount = count[0];
maxpos = page;
- } else if ((count[0] > maxcount) && (count[0] < 0xc0000000)) {
+ } else if (count[0] > maxcount && count[0] < 0xc0000000) {
maxcount = count[0];
maxpos = page;
- } else if ((count[0] > maxcount) && (count[0] > 0xc0000000)
- && (maxcount > 0x80000000)) {
+ } else if (count[0] > maxcount && count[0] > 0xc0000000
+ && maxcount > 0x80000000) {
maxcount = count[0];
maxpos = page;
}
mtdoops_inc_counter(cxt);
}
-
-static void mtdoops_notify_add(struct mtd_info *mtd)
+static void mtdoops_do_dump(struct kmsg_dumper *dumper,
+ enum kmsg_dump_reason reason, const char *s1, unsigned long l1,
+ const char *s2, unsigned long l2)
{
- struct mtdoops_context *cxt = &oops_cxt;
+ struct mtdoops_context *cxt = container_of(dumper,
+ struct mtdoops_context, dump);
+ unsigned long s1_start, s2_start;
+ unsigned long l1_cpy, l2_cpy;
+ char *dst;
+
+ /* Only dump oopses if dump_oops is set */
+ if (reason == KMSG_DUMP_OOPS && !dump_oops)
+ return;
- if (cxt->name && !strcmp(mtd->name, cxt->name))
- cxt->mtd_index = mtd->index;
+ dst = cxt->oops_buf + MTDOOPS_HEADER_SIZE; /* Skip the header */
+ l2_cpy = min(l2, record_size - MTDOOPS_HEADER_SIZE);
+ l1_cpy = min(l1, record_size - MTDOOPS_HEADER_SIZE - l2_cpy);
- if ((mtd->index != cxt->mtd_index) || cxt->mtd_index < 0)
- return;
+ s2_start = l2 - l2_cpy;
+ s1_start = l1 - l1_cpy;
- if (mtd->size < (mtd->erasesize * 2)) {
- printk(KERN_ERR "MTD partition %d not big enough for mtdoops\n",
- mtd->index);
- return;
- }
+ memcpy(dst, s1 + s1_start, l1_cpy);
+ memcpy(dst + l1_cpy, s2 + s2_start, l2_cpy);
- if (mtd->erasesize < OOPS_PAGE_SIZE) {
- printk(KERN_ERR "Eraseblock size of MTD partition %d too small\n",
- mtd->index);
+ /* Panics must be written immediately */
+ if (reason == KMSG_DUMP_PANIC) {
+ if (!cxt->mtd->panic_write)
+ printk(KERN_ERR "mtdoops: Cannot write from panic without panic_write\n");
+ else
+ mtdoops_write(cxt, 1);
return;
}
- cxt->mtd = mtd;
- if (mtd->size > INT_MAX)
- cxt->oops_pages = INT_MAX / OOPS_PAGE_SIZE;
- else
- cxt->oops_pages = (int)mtd->size / OOPS_PAGE_SIZE;
-
- find_next_position(cxt);
-
- printk(KERN_INFO "mtdoops: Attached to MTD device %d\n", mtd->index);
+ /* For other cases, schedule work to write it "nicely" */
+ schedule_work(&cxt->work_write);
}
-static void mtdoops_notify_remove(struct mtd_info *mtd)
+static void mtdoops_notify_add(struct mtd_info *mtd)
{
struct mtdoops_context *cxt = &oops_cxt;
+ u64 mtdoops_pages = div_u64(mtd->size, record_size);
+ int err;
- if ((mtd->index != cxt->mtd_index) || cxt->mtd_index < 0)
- return;
-
- cxt->mtd = NULL;
- flush_scheduled_work();
-}
-
-static void mtdoops_console_sync(void)
-{
- struct mtdoops_context *cxt = &oops_cxt;
- struct mtd_info *mtd = cxt->mtd;
- unsigned long flags;
+ if (!strcmp(mtd->name, mtddev))
+ cxt->mtd_index = mtd->index;
- if (!cxt->ready || !mtd || cxt->writecount == 0)
+ if (mtd->index != cxt->mtd_index || cxt->mtd_index < 0)
return;
- /*
- * Once ready is 0 and we've held the lock no further writes to the
- * buffer will happen
- */
- spin_lock_irqsave(&cxt->writecount_lock, flags);
- if (!cxt->ready) {
- spin_unlock_irqrestore(&cxt->writecount_lock, flags);
+ if (mtd->size < mtd->erasesize * 2) {
+ printk(KERN_ERR "mtdoops: MTD partition %d not big enough for mtdoops\n",
+ mtd->index);
return;
}
- cxt->ready = 0;
- spin_unlock_irqrestore(&cxt->writecount_lock, flags);
-
- if (mtd->panic_write && in_interrupt())
- /* Interrupt context, we're going to panic so try and log */
- mtdoops_write(cxt, 1);
- else
- schedule_work(&cxt->work_write);
-}
-
-static void
-mtdoops_console_write(struct console *co, const char *s, unsigned int count)
-{
- struct mtdoops_context *cxt = co->data;
- struct mtd_info *mtd = cxt->mtd;
- unsigned long flags;
-
- if (!oops_in_progress) {
- mtdoops_console_sync();
+ if (mtd->erasesize < record_size) {
+ printk(KERN_ERR "mtdoops: eraseblock size of MTD partition %d too small\n",
+ mtd->index);
return;
}
-
- if (!cxt->ready || !mtd)
+ if (mtd->size > MTDOOPS_MAX_MTD_SIZE) {
+ printk(KERN_ERR "mtdoops: mtd%d is too large (limit is %d MiB)\n",
+ mtd->index, MTDOOPS_MAX_MTD_SIZE / 1024 / 1024);
return;
+ }
- /* Locking on writecount ensures sequential writes to the buffer */
- spin_lock_irqsave(&cxt->writecount_lock, flags);
-
- /* Check ready status didn't change whilst waiting for the lock */
- if (!cxt->ready) {
- spin_unlock_irqrestore(&cxt->writecount_lock, flags);
+ /* oops_page_used is a bit field */
+ cxt->oops_page_used = vmalloc(DIV_ROUND_UP(mtdoops_pages,
+ BITS_PER_LONG));
+ if (!cxt->oops_page_used) {
+ printk(KERN_ERR "mtdoops: could not allocate page array\n");
return;
}
- if (cxt->writecount == 0) {
- u32 *stamp = cxt->oops_buf;
- *stamp++ = cxt->nextcount;
- *stamp = MTDOOPS_KERNMSG_MAGIC;
- cxt->writecount = 8;
+ cxt->dump.dump = mtdoops_do_dump;
+ err = kmsg_dump_register(&cxt->dump);
+ if (err) {
+ printk(KERN_ERR "mtdoops: registering kmsg dumper failed, error %d\n", err);
+ vfree(cxt->oops_page_used);
+ cxt->oops_page_used = NULL;
+ return;
}
- if ((count + cxt->writecount) > OOPS_PAGE_SIZE)
- count = OOPS_PAGE_SIZE - cxt->writecount;
-
- memcpy(cxt->oops_buf + cxt->writecount, s, count);
- cxt->writecount += count;
-
- spin_unlock_irqrestore(&cxt->writecount_lock, flags);
-
- if (cxt->writecount == OOPS_PAGE_SIZE)
- mtdoops_console_sync();
+ cxt->mtd = mtd;
+ cxt->oops_pages = (int)mtd->size / record_size;
+ find_next_position(cxt);
+ printk(KERN_INFO "mtdoops: Attached to MTD device %d\n", mtd->index);
}
-static int __init mtdoops_console_setup(struct console *co, char *options)
+static void mtdoops_notify_remove(struct mtd_info *mtd)
{
- struct mtdoops_context *cxt = co->data;
+ struct mtdoops_context *cxt = &oops_cxt;
- if (cxt->mtd_index != -1 || cxt->name)
- return -EBUSY;
- if (options) {
- cxt->name = kstrdup(options, GFP_KERNEL);
- return 0;
- }
- if (co->index == -1)
- return -EINVAL;
+ if (mtd->index != cxt->mtd_index || cxt->mtd_index < 0)
+ return;
- cxt->mtd_index = co->index;
- return 0;
+ if (kmsg_dump_unregister(&cxt->dump) < 0)
+ printk(KERN_WARNING "mtdoops: could not unregister kmsg_dumper\n");
+
+ cxt->mtd = NULL;
+ flush_scheduled_work();
}
+
static struct mtd_notifier mtdoops_notifier = {
.add = mtdoops_notify_add,
.remove = mtdoops_notify_remove,
};
-static struct console mtdoops_console = {
- .name = "ttyMTD",
- .write = mtdoops_console_write,
- .setup = mtdoops_console_setup,
- .unblank = mtdoops_console_sync,
- .index = -1,
- .data = &oops_cxt,
-};
-
-static int __init mtdoops_console_init(void)
+static int __init mtdoops_init(void)
{
struct mtdoops_context *cxt = &oops_cxt;
+ int mtd_index;
+ char *endp;
+ if (strlen(mtddev) == 0) {
+ printk(KERN_ERR "mtdoops: mtd device (mtddev=name/number) must be supplied\n");
+ return -EINVAL;
+ }
+ if ((record_size & 4095) != 0) {
+ printk(KERN_ERR "mtdoops: record_size must be a multiple of 4096\n");
+ return -EINVAL;
+ }
+ if (record_size < 4096) {
+ printk(KERN_ERR "mtdoops: record_size must be over 4096 bytes\n");
+ return -EINVAL;
+ }
+
+ /* Setup the MTD device to use */
cxt->mtd_index = -1;
- cxt->oops_buf = vmalloc(OOPS_PAGE_SIZE);
- spin_lock_init(&cxt->writecount_lock);
+ mtd_index = simple_strtoul(mtddev, &endp, 0);
+ if (*endp == '\0')
+ cxt->mtd_index = mtd_index;
+ if (cxt->mtd_index > MAX_MTD_DEVICES) {
+ printk(KERN_ERR "mtdoops: invalid mtd device number (%u) given\n",
+ mtd_index);
+ return -EINVAL;
+ }
+ cxt->oops_buf = vmalloc(record_size);
if (!cxt->oops_buf) {
- printk(KERN_ERR "Failed to allocate mtdoops buffer workspace\n");
+ printk(KERN_ERR "mtdoops: failed to allocate buffer workspace\n");
return -ENOMEM;
}
+ memset(cxt->oops_buf, 0xff, record_size);
INIT_WORK(&cxt->work_erase, mtdoops_workfunc_erase);
INIT_WORK(&cxt->work_write, mtdoops_workfunc_write);
- register_console(&mtdoops_console);
register_mtd_user(&mtdoops_notifier);
return 0;
}
-static void __exit mtdoops_console_exit(void)
+static void __exit mtdoops_exit(void)
{
struct mtdoops_context *cxt = &oops_cxt;
unregister_mtd_user(&mtdoops_notifier);
- unregister_console(&mtdoops_console);
- kfree(cxt->name);
vfree(cxt->oops_buf);
+ vfree(cxt->oops_page_used);
}
-subsys_initcall(mtdoops_console_init);
-module_exit(mtdoops_console_exit);
+module_init(mtdoops_init);
+module_exit(mtdoops_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Richard Purdie <rpurdie@openedhand.com>");
when the is NAND chip selected or released, but will save
approximately 5mA of power when there is nothing happening.
+config MTD_NAND_BCM_UMI
+ tristate "NAND Flash support for BCM Reference Boards"
+ depends on ARCH_BCMRING && MTD_NAND
+ help
+ This enables the NAND flash controller on the BCM UMI block.
+
+ No board specfic support is done by this driver, each board
+ must advertise a platform_device for the driver to attach.
+
+config MTD_NAND_BCM_UMI_HWCS
+ bool "BCM UMI NAND Hardware CS"
+ depends on MTD_NAND_BCM_UMI
+ help
+ Enable the use of the BCM UMI block's internal CS using NAND.
+ This should only be used if you know the external NAND CS can toggle.
+
config MTD_NAND_DISKONCHIP
tristate "DiskOnChip 2000, Millennium and Millennium Plus (NAND reimplementation) (EXPERIMENTAL)"
depends on EXPERIMENTAL
obj-$(CONFIG_MTD_NAND_TXX9NDFMC) += txx9ndfmc.o
obj-$(CONFIG_MTD_NAND_W90P910) += w90p910_nand.o
obj-$(CONFIG_MTD_NAND_NOMADIK) += nomadik_nand.o
+obj-$(CONFIG_MTD_NAND_BCM_UMI) += bcm_umi_nand.o nand_bcm_umi.o
nand-objs := nand_base.o nand_bbt.o
return __alauda_read_page(mtd, from, ignore_buf, oob);
}
-static int popcount8(u8 c)
-{
- int ret = 0;
-
- for ( ; c; c>>=1)
- ret += c & 1;
- return ret;
-}
-
static int alauda_isbad(struct mtd_info *mtd, loff_t ofs)
{
u8 oob[16];
return err;
/* A block is marked bad if two or more bits are zero */
- return popcount8(oob[5]) >= 7 ? 0 : 1;
+ return hweight8(oob[5]) >= 7 ? 0 : 1;
}
static int alauda_bounce_read(struct mtd_info *mtd, loff_t from, size_t len,
{
struct nand_chip *nand_chip = mtd->priv;
struct atmel_nand_host *host = nand_chip->priv;
- uint32_t *eccpos = nand_chip->ecc.layout->eccpos;
unsigned int ecc_value;
/* get the first 2 ECC bytes */
if (host->board->det_pin) {
if (gpio_get_value(host->board->det_pin)) {
printk(KERN_INFO "No SmartMedia card inserted.\n");
- res = ENXIO;
+ res = -ENXIO;
goto err_no_card;
}
}
if ((!partitions) || (num_partitions == 0)) {
printk(KERN_ERR "atmel_nand: No partitions defined, or unsupported device.\n");
- res = ENXIO;
+ res = -ENXIO;
goto err_no_partitions;
}
--- /dev/null
+/*****************************************************************************
+* Copyright 2004 - 2009 Broadcom Corporation. All rights reserved.
+*
+* Unless you and Broadcom execute a separate written software license
+* agreement governing use of this software, this software is licensed to you
+* under the terms of the GNU General Public License version 2, available at
+* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
+*
+* Notwithstanding the above, under no circumstances may you combine this
+* software in any way with any other Broadcom software provided under a
+* license other than the GPL, without Broadcom's express prior written
+* consent.
+*****************************************************************************/
+
+/* ---- Include Files ---------------------------------------------------- */
+#include "nand_bcm_umi.h"
+
+/* ---- External Variable Declarations ----------------------------------- */
+/* ---- External Function Prototypes ------------------------------------- */
+/* ---- Public Variables ------------------------------------------------- */
+/* ---- Private Constants and Types -------------------------------------- */
+
+/* ---- Private Function Prototypes -------------------------------------- */
+static int bcm_umi_bch_read_page_hwecc(struct mtd_info *mtd,
+ struct nand_chip *chip, uint8_t *buf, int page);
+static void bcm_umi_bch_write_page_hwecc(struct mtd_info *mtd,
+ struct nand_chip *chip, const uint8_t *buf);
+
+/* ---- Private Variables ------------------------------------------------ */
+
+/*
+** nand_hw_eccoob
+** New oob placement block for use with hardware ecc generation.
+*/
+static struct nand_ecclayout nand_hw_eccoob_512 = {
+ /* Reserve 5 for BI indicator */
+ .oobfree = {
+#if (NAND_ECC_NUM_BYTES > 3)
+ {.offset = 0, .length = 2}
+#else
+ {.offset = 0, .length = 5},
+ {.offset = 6, .length = 7}
+#endif
+ }
+};
+
+/*
+** We treat the OOB for a 2K page as if it were 4 512 byte oobs,
+** except the BI is at byte 0.
+*/
+static struct nand_ecclayout nand_hw_eccoob_2048 = {
+ /* Reserve 0 as BI indicator */
+ .oobfree = {
+#if (NAND_ECC_NUM_BYTES > 10)
+ {.offset = 1, .length = 2},
+#elif (NAND_ECC_NUM_BYTES > 7)
+ {.offset = 1, .length = 5},
+ {.offset = 16, .length = 6},
+ {.offset = 32, .length = 6},
+ {.offset = 48, .length = 6}
+#else
+ {.offset = 1, .length = 8},
+ {.offset = 16, .length = 9},
+ {.offset = 32, .length = 9},
+ {.offset = 48, .length = 9}
+#endif
+ }
+};
+
+/* We treat the OOB for a 4K page as if it were 8 512 byte oobs,
+ * except the BI is at byte 0. */
+static struct nand_ecclayout nand_hw_eccoob_4096 = {
+ /* Reserve 0 as BI indicator */
+ .oobfree = {
+#if (NAND_ECC_NUM_BYTES > 10)
+ {.offset = 1, .length = 2},
+ {.offset = 16, .length = 3},
+ {.offset = 32, .length = 3},
+ {.offset = 48, .length = 3},
+ {.offset = 64, .length = 3},
+ {.offset = 80, .length = 3},
+ {.offset = 96, .length = 3},
+ {.offset = 112, .length = 3}
+#else
+ {.offset = 1, .length = 5},
+ {.offset = 16, .length = 6},
+ {.offset = 32, .length = 6},
+ {.offset = 48, .length = 6},
+ {.offset = 64, .length = 6},
+ {.offset = 80, .length = 6},
+ {.offset = 96, .length = 6},
+ {.offset = 112, .length = 6}
+#endif
+ }
+};
+
+/* ---- Private Functions ------------------------------------------------ */
+/* ==== Public Functions ================================================= */
+
+/****************************************************************************
+*
+* bcm_umi_bch_read_page_hwecc - hardware ecc based page read function
+* @mtd: mtd info structure
+* @chip: nand chip info structure
+* @buf: buffer to store read data
+*
+***************************************************************************/
+static int bcm_umi_bch_read_page_hwecc(struct mtd_info *mtd,
+ struct nand_chip *chip, uint8_t * buf,
+ int page)
+{
+ int sectorIdx = 0;
+ int eccsize = chip->ecc.size;
+ int eccsteps = chip->ecc.steps;
+ uint8_t *datap = buf;
+ uint8_t eccCalc[NAND_ECC_NUM_BYTES];
+ int sectorOobSize = mtd->oobsize / eccsteps;
+ int stat;
+
+ for (sectorIdx = 0; sectorIdx < eccsteps;
+ sectorIdx++, datap += eccsize) {
+ if (sectorIdx > 0) {
+ /* Seek to page location within sector */
+ chip->cmdfunc(mtd, NAND_CMD_RNDOUT, sectorIdx * eccsize,
+ -1);
+ }
+
+ /* Enable hardware ECC before reading the buf */
+ nand_bcm_umi_bch_enable_read_hwecc();
+
+ /* Read in data */
+ bcm_umi_nand_read_buf(mtd, datap, eccsize);
+
+ /* Pause hardware ECC after reading the buf */
+ nand_bcm_umi_bch_pause_read_ecc_calc();
+
+ /* Read the OOB ECC */
+ chip->cmdfunc(mtd, NAND_CMD_RNDOUT,
+ mtd->writesize + sectorIdx * sectorOobSize, -1);
+ nand_bcm_umi_bch_read_oobEcc(mtd->writesize, eccCalc,
+ NAND_ECC_NUM_BYTES,
+ chip->oob_poi +
+ sectorIdx * sectorOobSize);
+
+ /* Correct any ECC detected errors */
+ stat =
+ nand_bcm_umi_bch_correct_page(datap, eccCalc,
+ NAND_ECC_NUM_BYTES);
+
+ /* Update Stats */
+ if (stat < 0) {
+#if defined(NAND_BCM_UMI_DEBUG)
+ printk(KERN_WARNING "%s uncorr_err sectorIdx=%d\n",
+ __func__, sectorIdx);
+ printk(KERN_WARNING
+ "%s data %02x %02x %02x %02x "
+ "%02x %02x %02x %02x\n",
+ __func__, datap[0], datap[1], datap[2], datap[3],
+ datap[4], datap[5], datap[6], datap[7]);
+ printk(KERN_WARNING
+ "%s ecc %02x %02x %02x %02x "
+ "%02x %02x %02x %02x %02x %02x "
+ "%02x %02x %02x\n",
+ __func__, eccCalc[0], eccCalc[1], eccCalc[2],
+ eccCalc[3], eccCalc[4], eccCalc[5], eccCalc[6],
+ eccCalc[7], eccCalc[8], eccCalc[9], eccCalc[10],
+ eccCalc[11], eccCalc[12]);
+ BUG();
+#endif
+ mtd->ecc_stats.failed++;
+ } else {
+#if defined(NAND_BCM_UMI_DEBUG)
+ if (stat > 0) {
+ printk(KERN_INFO
+ "%s %d correctable_errors detected\n",
+ __func__, stat);
+ }
+#endif
+ mtd->ecc_stats.corrected += stat;
+ }
+ }
+ return 0;
+}
+
+/****************************************************************************
+*
+* bcm_umi_bch_write_page_hwecc - hardware ecc based page write function
+* @mtd: mtd info structure
+* @chip: nand chip info structure
+* @buf: data buffer
+*
+***************************************************************************/
+static void bcm_umi_bch_write_page_hwecc(struct mtd_info *mtd,
+ struct nand_chip *chip, const uint8_t *buf)
+{
+ int sectorIdx = 0;
+ int eccsize = chip->ecc.size;
+ int eccsteps = chip->ecc.steps;
+ const uint8_t *datap = buf;
+ uint8_t *oobp = chip->oob_poi;
+ int sectorOobSize = mtd->oobsize / eccsteps;
+
+ for (sectorIdx = 0; sectorIdx < eccsteps;
+ sectorIdx++, datap += eccsize, oobp += sectorOobSize) {
+ /* Enable hardware ECC before writing the buf */
+ nand_bcm_umi_bch_enable_write_hwecc();
+ bcm_umi_nand_write_buf(mtd, datap, eccsize);
+ nand_bcm_umi_bch_write_oobEcc(mtd->writesize, oobp,
+ NAND_ECC_NUM_BYTES);
+ }
+
+ bcm_umi_nand_write_buf(mtd, chip->oob_poi, mtd->oobsize);
+}
--- /dev/null
+/*****************************************************************************
+* Copyright 2004 - 2009 Broadcom Corporation. All rights reserved.
+*
+* Unless you and Broadcom execute a separate written software license
+* agreement governing use of this software, this software is licensed to you
+* under the terms of the GNU General Public License version 2, available at
+* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
+*
+* Notwithstanding the above, under no circumstances may you combine this
+* software in any way with any other Broadcom software provided under a
+* license other than the GPL, without Broadcom's express prior written
+* consent.
+*****************************************************************************/
+
+/* ---- Include Files ---------------------------------------------------- */
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/nand_ecc.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/mach-types.h>
+#include <asm/system.h>
+
+#include <mach/reg_nand.h>
+#include <mach/reg_umi.h>
+
+#include "nand_bcm_umi.h"
+
+#include <mach/memory_settings.h>
+
+#define USE_DMA 1
+#include <mach/dma.h>
+#include <linux/dma-mapping.h>
+#include <linux/completion.h>
+
+/* ---- External Variable Declarations ----------------------------------- */
+/* ---- External Function Prototypes ------------------------------------- */
+/* ---- Public Variables ------------------------------------------------- */
+/* ---- Private Constants and Types -------------------------------------- */
+static const __devinitconst char gBanner[] = KERN_INFO \
+ "BCM UMI MTD NAND Driver: 1.00\n";
+
+#ifdef CONFIG_MTD_PARTITIONS
+const char *part_probes[] = { "cmdlinepart", NULL };
+#endif
+
+#if NAND_ECC_BCH
+static uint8_t scan_ff_pattern[] = { 0xff };
+
+static struct nand_bbt_descr largepage_bbt = {
+ .options = 0,
+ .offs = 0,
+ .len = 1,
+ .pattern = scan_ff_pattern
+};
+#endif
+
+/*
+** Preallocate a buffer to avoid having to do this every dma operation.
+** This is the size of the preallocated coherent DMA buffer.
+*/
+#if USE_DMA
+#define DMA_MIN_BUFLEN 512
+#define DMA_MAX_BUFLEN PAGE_SIZE
+#define USE_DIRECT_IO(len) (((len) < DMA_MIN_BUFLEN) || \
+ ((len) > DMA_MAX_BUFLEN))
+
+/*
+ * The current NAND data space goes from 0x80001900 to 0x80001FFF,
+ * which is only 0x700 = 1792 bytes long. This is too small for 2K, 4K page
+ * size NAND flash. Need to break the DMA down to multiple 1Ks.
+ *
+ * Need to make sure REG_NAND_DATA_PADDR + DMA_MAX_LEN < 0x80002000
+ */
+#define DMA_MAX_LEN 1024
+
+#else /* !USE_DMA */
+#define DMA_MIN_BUFLEN 0
+#define DMA_MAX_BUFLEN 0
+#define USE_DIRECT_IO(len) 1
+#endif
+/* ---- Private Function Prototypes -------------------------------------- */
+static void bcm_umi_nand_read_buf(struct mtd_info *mtd, u_char * buf, int len);
+static void bcm_umi_nand_write_buf(struct mtd_info *mtd, const u_char * buf,
+ int len);
+
+/* ---- Private Variables ------------------------------------------------ */
+static struct mtd_info *board_mtd;
+static void __iomem *bcm_umi_io_base;
+static void *virtPtr;
+static dma_addr_t physPtr;
+static struct completion nand_comp;
+
+/* ---- Private Functions ------------------------------------------------ */
+#if NAND_ECC_BCH
+#include "bcm_umi_bch.c"
+#else
+#include "bcm_umi_hamming.c"
+#endif
+
+#if USE_DMA
+
+/* Handler called when the DMA finishes. */
+static void nand_dma_handler(DMA_Device_t dev, int reason, void *userData)
+{
+ complete(&nand_comp);
+}
+
+static int nand_dma_init(void)
+{
+ int rc;
+
+ rc = dma_set_device_handler(DMA_DEVICE_NAND_MEM_TO_MEM,
+ nand_dma_handler, NULL);
+ if (rc != 0) {
+ printk(KERN_ERR "dma_set_device_handler failed: %d\n", rc);
+ return rc;
+ }
+
+ virtPtr =
+ dma_alloc_coherent(NULL, DMA_MAX_BUFLEN, &physPtr, GFP_KERNEL);
+ if (virtPtr == NULL) {
+ printk(KERN_ERR "NAND - Failed to allocate memory for DMA buffer\n");
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void nand_dma_term(void)
+{
+ if (virtPtr != NULL)
+ dma_free_coherent(NULL, DMA_MAX_BUFLEN, virtPtr, physPtr);
+}
+
+static void nand_dma_read(void *buf, int len)
+{
+ int offset = 0;
+ int tmp_len = 0;
+ int len_left = len;
+ DMA_Handle_t hndl;
+
+ if (virtPtr == NULL)
+ panic("nand_dma_read: virtPtr == NULL\n");
+
+ if ((void *)physPtr == NULL)
+ panic("nand_dma_read: physPtr == NULL\n");
+
+ hndl = dma_request_channel(DMA_DEVICE_NAND_MEM_TO_MEM);
+ if (hndl < 0) {
+ printk(KERN_ERR
+ "nand_dma_read: unable to allocate dma channel: %d\n",
+ (int)hndl);
+ panic("\n");
+ }
+
+ while (len_left > 0) {
+ if (len_left > DMA_MAX_LEN) {
+ tmp_len = DMA_MAX_LEN;
+ len_left -= DMA_MAX_LEN;
+ } else {
+ tmp_len = len_left;
+ len_left = 0;
+ }
+
+ init_completion(&nand_comp);
+ dma_transfer_mem_to_mem(hndl, REG_NAND_DATA_PADDR,
+ physPtr + offset, tmp_len);
+ wait_for_completion(&nand_comp);
+
+ offset += tmp_len;
+ }
+
+ dma_free_channel(hndl);
+
+ if (buf != NULL)
+ memcpy(buf, virtPtr, len);
+}
+
+static void nand_dma_write(const void *buf, int len)
+{
+ int offset = 0;
+ int tmp_len = 0;
+ int len_left = len;
+ DMA_Handle_t hndl;
+
+ if (buf == NULL)
+ panic("nand_dma_write: buf == NULL\n");
+
+ if (virtPtr == NULL)
+ panic("nand_dma_write: virtPtr == NULL\n");
+
+ if ((void *)physPtr == NULL)
+ panic("nand_dma_write: physPtr == NULL\n");
+
+ memcpy(virtPtr, buf, len);
+
+
+ hndl = dma_request_channel(DMA_DEVICE_NAND_MEM_TO_MEM);
+ if (hndl < 0) {
+ printk(KERN_ERR
+ "nand_dma_write: unable to allocate dma channel: %d\n",
+ (int)hndl);
+ panic("\n");
+ }
+
+ while (len_left > 0) {
+ if (len_left > DMA_MAX_LEN) {
+ tmp_len = DMA_MAX_LEN;
+ len_left -= DMA_MAX_LEN;
+ } else {
+ tmp_len = len_left;
+ len_left = 0;
+ }
+
+ init_completion(&nand_comp);
+ dma_transfer_mem_to_mem(hndl, physPtr + offset,
+ REG_NAND_DATA_PADDR, tmp_len);
+ wait_for_completion(&nand_comp);
+
+ offset += tmp_len;
+ }
+
+ dma_free_channel(hndl);
+}
+
+#endif
+
+static int nand_dev_ready(struct mtd_info *mtd)
+{
+ return nand_bcm_umi_dev_ready();
+}
+
+/****************************************************************************
+*
+* bcm_umi_nand_inithw
+*
+* This routine does the necessary hardware (board-specific)
+* initializations. This includes setting up the timings, etc.
+*
+***************************************************************************/
+int bcm_umi_nand_inithw(void)
+{
+ /* Configure nand timing parameters */
+ REG_UMI_NAND_TCR &= ~0x7ffff;
+ REG_UMI_NAND_TCR |= HW_CFG_NAND_TCR;
+
+#if !defined(CONFIG_MTD_NAND_BCM_UMI_HWCS)
+ /* enable software control of CS */
+ REG_UMI_NAND_TCR |= REG_UMI_NAND_TCR_CS_SWCTRL;
+#endif
+
+ /* keep NAND chip select asserted */
+ REG_UMI_NAND_RCSR |= REG_UMI_NAND_RCSR_CS_ASSERTED;
+
+ REG_UMI_NAND_TCR &= ~REG_UMI_NAND_TCR_WORD16;
+ /* enable writes to flash */
+ REG_UMI_MMD_ICR |= REG_UMI_MMD_ICR_FLASH_WP;
+
+ writel(NAND_CMD_RESET, bcm_umi_io_base + REG_NAND_CMD_OFFSET);
+ nand_bcm_umi_wait_till_ready();
+
+#if NAND_ECC_BCH
+ nand_bcm_umi_bch_config_ecc(NAND_ECC_NUM_BYTES);
+#endif
+
+ return 0;
+}
+
+/* Used to turn latch the proper register for access. */
+static void bcm_umi_nand_hwcontrol(struct mtd_info *mtd, int cmd,
+ unsigned int ctrl)
+{
+ /* send command to hardware */
+ struct nand_chip *chip = mtd->priv;
+ if (ctrl & NAND_CTRL_CHANGE) {
+ if (ctrl & NAND_CLE) {
+ chip->IO_ADDR_W = bcm_umi_io_base + REG_NAND_CMD_OFFSET;
+ goto CMD;
+ }
+ if (ctrl & NAND_ALE) {
+ chip->IO_ADDR_W =
+ bcm_umi_io_base + REG_NAND_ADDR_OFFSET;
+ goto CMD;
+ }
+ chip->IO_ADDR_W = bcm_umi_io_base + REG_NAND_DATA8_OFFSET;
+ }
+
+CMD:
+ /* Send command to chip directly */
+ if (cmd != NAND_CMD_NONE)
+ writeb(cmd, chip->IO_ADDR_W);
+}
+
+static void bcm_umi_nand_write_buf(struct mtd_info *mtd, const u_char * buf,
+ int len)
+{
+ if (USE_DIRECT_IO(len)) {
+ /* Do it the old way if the buffer is small or too large.
+ * Probably quicker than starting and checking dma. */
+ int i;
+ struct nand_chip *this = mtd->priv;
+
+ for (i = 0; i < len; i++)
+ writeb(buf[i], this->IO_ADDR_W);
+ }
+#if USE_DMA
+ else
+ nand_dma_write(buf, len);
+#endif
+}
+
+static void bcm_umi_nand_read_buf(struct mtd_info *mtd, u_char * buf, int len)
+{
+ if (USE_DIRECT_IO(len)) {
+ int i;
+ struct nand_chip *this = mtd->priv;
+
+ for (i = 0; i < len; i++)
+ buf[i] = readb(this->IO_ADDR_R);
+ }
+#if USE_DMA
+ else
+ nand_dma_read(buf, len);
+#endif
+}
+
+static uint8_t readbackbuf[NAND_MAX_PAGESIZE];
+static int bcm_umi_nand_verify_buf(struct mtd_info *mtd, const u_char * buf,
+ int len)
+{
+ /*
+ * Try to readback page with ECC correction. This is necessary
+ * for MLC parts which may have permanently stuck bits.
+ */
+ struct nand_chip *chip = mtd->priv;
+ int ret = chip->ecc.read_page(mtd, chip, readbackbuf, 0);
+ if (ret < 0)
+ return -EFAULT;
+ else {
+ if (memcmp(readbackbuf, buf, len) == 0)
+ return 0;
+
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static int __devinit bcm_umi_nand_probe(struct platform_device *pdev)
+{
+ struct nand_chip *this;
+ struct resource *r;
+ int err = 0;
+
+ printk(gBanner);
+
+ /* Allocate memory for MTD device structure and private data */
+ board_mtd =
+ kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip),
+ GFP_KERNEL);
+ if (!board_mtd) {
+ printk(KERN_WARNING
+ "Unable to allocate NAND MTD device structure.\n");
+ return -ENOMEM;
+ }
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ if (!r)
+ return -ENXIO;
+
+ /* map physical adress */
+ bcm_umi_io_base = ioremap(r->start, r->end - r->start + 1);
+
+ if (!bcm_umi_io_base) {
+ printk(KERN_ERR "ioremap to access BCM UMI NAND chip failed\n");
+ kfree(board_mtd);
+ return -EIO;
+ }
+
+ /* Get pointer to private data */
+ this = (struct nand_chip *)(&board_mtd[1]);
+
+ /* Initialize structures */
+ memset((char *)board_mtd, 0, sizeof(struct mtd_info));
+ memset((char *)this, 0, sizeof(struct nand_chip));
+
+ /* Link the private data with the MTD structure */
+ board_mtd->priv = this;
+
+ /* Initialize the NAND hardware. */
+ if (bcm_umi_nand_inithw() < 0) {
+ printk(KERN_ERR "BCM UMI NAND chip could not be initialized\n");
+ iounmap(bcm_umi_io_base);
+ kfree(board_mtd);
+ return -EIO;
+ }
+
+ /* Set address of NAND IO lines */
+ this->IO_ADDR_W = bcm_umi_io_base + REG_NAND_DATA8_OFFSET;
+ this->IO_ADDR_R = bcm_umi_io_base + REG_NAND_DATA8_OFFSET;
+
+ /* Set command delay time, see datasheet for correct value */
+ this->chip_delay = 0;
+ /* Assign the device ready function, if available */
+ this->dev_ready = nand_dev_ready;
+ this->options = 0;
+
+ this->write_buf = bcm_umi_nand_write_buf;
+ this->read_buf = bcm_umi_nand_read_buf;
+ this->verify_buf = bcm_umi_nand_verify_buf;
+
+ this->cmd_ctrl = bcm_umi_nand_hwcontrol;
+ this->ecc.mode = NAND_ECC_HW;
+ this->ecc.size = 512;
+ this->ecc.bytes = NAND_ECC_NUM_BYTES;
+#if NAND_ECC_BCH
+ this->ecc.read_page = bcm_umi_bch_read_page_hwecc;
+ this->ecc.write_page = bcm_umi_bch_write_page_hwecc;
+#else
+ this->ecc.correct = nand_correct_data512;
+ this->ecc.calculate = bcm_umi_hamming_get_hw_ecc;
+ this->ecc.hwctl = bcm_umi_hamming_enable_hwecc;
+#endif
+
+#if USE_DMA
+ err = nand_dma_init();
+ if (err != 0)
+ return err;
+#endif
+
+ /* Figure out the size of the device that we have.
+ * We need to do this to figure out which ECC
+ * layout we'll be using.
+ */
+
+ err = nand_scan_ident(board_mtd, 1);
+ if (err) {
+ printk(KERN_ERR "nand_scan failed: %d\n", err);
+ iounmap(bcm_umi_io_base);
+ kfree(board_mtd);
+ return err;
+ }
+
+ /* Now that we know the nand size, we can setup the ECC layout */
+
+ switch (board_mtd->writesize) { /* writesize is the pagesize */
+ case 4096:
+ this->ecc.layout = &nand_hw_eccoob_4096;
+ break;
+ case 2048:
+ this->ecc.layout = &nand_hw_eccoob_2048;
+ break;
+ case 512:
+ this->ecc.layout = &nand_hw_eccoob_512;
+ break;
+ default:
+ {
+ printk(KERN_ERR "NAND - Unrecognized pagesize: %d\n",
+ board_mtd->writesize);
+ return -EINVAL;
+ }
+ }
+
+#if NAND_ECC_BCH
+ if (board_mtd->writesize > 512) {
+ if (this->options & NAND_USE_FLASH_BBT)
+ largepage_bbt.options = NAND_BBT_SCAN2NDPAGE;
+ this->badblock_pattern = &largepage_bbt;
+ }
+#endif
+
+ /* Now finish off the scan, now that ecc.layout has been initialized. */
+
+ err = nand_scan_tail(board_mtd);
+ if (err) {
+ printk(KERN_ERR "nand_scan failed: %d\n", err);
+ iounmap(bcm_umi_io_base);
+ kfree(board_mtd);
+ return err;
+ }
+
+ /* Register the partitions */
+ {
+ int nr_partitions;
+ struct mtd_partition *partition_info;
+
+ board_mtd->name = "bcm_umi-nand";
+ nr_partitions =
+ parse_mtd_partitions(board_mtd, part_probes,
+ &partition_info, 0);
+
+ if (nr_partitions <= 0) {
+ printk(KERN_ERR "BCM UMI NAND: Too few partitions - %d\n",
+ nr_partitions);
+ iounmap(bcm_umi_io_base);
+ kfree(board_mtd);
+ return -EIO;
+ }
+ add_mtd_partitions(board_mtd, partition_info, nr_partitions);
+ }
+
+ /* Return happy */
+ return 0;
+}
+
+static int bcm_umi_nand_remove(struct platform_device *pdev)
+{
+#if USE_DMA
+ nand_dma_term();
+#endif
+
+ /* Release resources, unregister device */
+ nand_release(board_mtd);
+
+ /* unmap physical adress */
+ iounmap(bcm_umi_io_base);
+
+ /* Free the MTD device structure */
+ kfree(board_mtd);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int bcm_umi_nand_suspend(struct platform_device *pdev,
+ pm_message_t state)
+{
+ printk(KERN_ERR "MTD NAND suspend is being called\n");
+ return 0;
+}
+
+static int bcm_umi_nand_resume(struct platform_device *pdev)
+{
+ printk(KERN_ERR "MTD NAND resume is being called\n");
+ return 0;
+}
+#else
+#define bcm_umi_nand_suspend NULL
+#define bcm_umi_nand_resume NULL
+#endif
+
+static struct platform_driver nand_driver = {
+ .driver = {
+ .name = "bcm-nand",
+ .owner = THIS_MODULE,
+ },
+ .probe = bcm_umi_nand_probe,
+ .remove = bcm_umi_nand_remove,
+ .suspend = bcm_umi_nand_suspend,
+ .resume = bcm_umi_nand_resume,
+};
+
+static int __init nand_init(void)
+{
+ return platform_driver_register(&nand_driver);
+}
+
+static void __exit nand_exit(void)
+{
+ platform_driver_unregister(&nand_driver);
+}
+
+module_init(nand_init);
+module_exit(nand_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Broadcom");
+MODULE_DESCRIPTION("BCM UMI MTD NAND driver");
/* options such as NAND_USE_FLASH_BBT or 16-bit widths */
info->chip.options = pdata->options;
+ info->chip.bbt_td = pdata->bbt_td;
+ info->chip.bbt_md = pdata->bbt_md;
info->ioaddr = (uint32_t __force) vaddr;
info->mask_chipsel = pdata->mask_chipsel;
/* use nandboot-capable ALE/CLE masks by default */
- info->mask_ale = pdata->mask_cle ? : MASK_ALE;
+ info->mask_ale = pdata->mask_ale ? : MASK_ALE;
info->mask_cle = pdata->mask_cle ? : MASK_CLE;
/* Set address of hardware control function */
* The binding to the mtd and all allocated
* resources are released.
*/
-static int __exit excite_nand_remove(struct platform_device *dev)
+static int __devexit excite_nand_remove(struct platform_device *dev)
{
struct excite_nand_drvdata * const this = platform_get_drvdata(dev);
ctrl->use_mdr = 0;
- dev_vdbg(ctrl->dev,
- "fsl_elbc_run_command: stat=%08x mdr=%08x fmr=%08x\n",
- ctrl->status, ctrl->mdr, in_be32(&lbc->fmr));
+ if (ctrl->status != LTESR_CC) {
+ dev_info(ctrl->dev,
+ "command failed: fir %x fcr %x status %x mdr %x\n",
+ in_be32(&lbc->fir), in_be32(&lbc->fcr),
+ ctrl->status, ctrl->mdr);
+ return -EIO;
+ }
- /* returns 0 on success otherwise non-zero) */
- return ctrl->status == LTESR_CC ? 0 : -EIO;
+ return 0;
}
static void fsl_elbc_do_read(struct nand_chip *chip, int oob)
if (priv->page_size) {
out_be32(&lbc->fir,
- (FIR_OP_CW0 << FIR_OP0_SHIFT) |
+ (FIR_OP_CM0 << FIR_OP0_SHIFT) |
(FIR_OP_CA << FIR_OP1_SHIFT) |
(FIR_OP_PA << FIR_OP2_SHIFT) |
- (FIR_OP_CW1 << FIR_OP3_SHIFT) |
+ (FIR_OP_CM1 << FIR_OP3_SHIFT) |
(FIR_OP_RBW << FIR_OP4_SHIFT));
out_be32(&lbc->fcr, (NAND_CMD_READ0 << FCR_CMD0_SHIFT) |
(NAND_CMD_READSTART << FCR_CMD1_SHIFT));
} else {
out_be32(&lbc->fir,
- (FIR_OP_CW0 << FIR_OP0_SHIFT) |
+ (FIR_OP_CM0 << FIR_OP0_SHIFT) |
(FIR_OP_CA << FIR_OP1_SHIFT) |
(FIR_OP_PA << FIR_OP2_SHIFT) |
(FIR_OP_RBW << FIR_OP3_SHIFT));
case NAND_CMD_READID:
dev_vdbg(ctrl->dev, "fsl_elbc_cmdfunc: NAND_CMD_READID.\n");
- out_be32(&lbc->fir, (FIR_OP_CW0 << FIR_OP0_SHIFT) |
+ out_be32(&lbc->fir, (FIR_OP_CM0 << FIR_OP0_SHIFT) |
(FIR_OP_UA << FIR_OP1_SHIFT) |
(FIR_OP_RBW << FIR_OP2_SHIFT));
out_be32(&lbc->fcr, NAND_CMD_READID << FCR_CMD0_SHIFT);
dev_vdbg(ctrl->dev, "fsl_elbc_cmdfunc: NAND_CMD_ERASE2.\n");
out_be32(&lbc->fir,
- (FIR_OP_CW0 << FIR_OP0_SHIFT) |
+ (FIR_OP_CM0 << FIR_OP0_SHIFT) |
(FIR_OP_PA << FIR_OP1_SHIFT) |
- (FIR_OP_CM1 << FIR_OP2_SHIFT));
+ (FIR_OP_CM2 << FIR_OP2_SHIFT) |
+ (FIR_OP_CW1 << FIR_OP3_SHIFT) |
+ (FIR_OP_RS << FIR_OP4_SHIFT));
out_be32(&lbc->fcr,
(NAND_CMD_ERASE1 << FCR_CMD0_SHIFT) |
- (NAND_CMD_ERASE2 << FCR_CMD1_SHIFT));
+ (NAND_CMD_STATUS << FCR_CMD1_SHIFT) |
+ (NAND_CMD_ERASE2 << FCR_CMD2_SHIFT));
out_be32(&lbc->fbcr, 0);
ctrl->read_bytes = 0;
+ ctrl->use_mdr = 1;
fsl_elbc_run_command(mtd);
return;
ctrl->column = column;
ctrl->oob = 0;
+ ctrl->use_mdr = 1;
- if (priv->page_size) {
- fcr = (NAND_CMD_SEQIN << FCR_CMD0_SHIFT) |
- (NAND_CMD_PAGEPROG << FCR_CMD1_SHIFT);
+ fcr = (NAND_CMD_STATUS << FCR_CMD1_SHIFT) |
+ (NAND_CMD_SEQIN << FCR_CMD2_SHIFT) |
+ (NAND_CMD_PAGEPROG << FCR_CMD3_SHIFT);
+ if (priv->page_size) {
out_be32(&lbc->fir,
- (FIR_OP_CW0 << FIR_OP0_SHIFT) |
+ (FIR_OP_CM2 << FIR_OP0_SHIFT) |
(FIR_OP_CA << FIR_OP1_SHIFT) |
(FIR_OP_PA << FIR_OP2_SHIFT) |
(FIR_OP_WB << FIR_OP3_SHIFT) |
- (FIR_OP_CW1 << FIR_OP4_SHIFT));
+ (FIR_OP_CM3 << FIR_OP4_SHIFT) |
+ (FIR_OP_CW1 << FIR_OP5_SHIFT) |
+ (FIR_OP_RS << FIR_OP6_SHIFT));
} else {
- fcr = (NAND_CMD_PAGEPROG << FCR_CMD1_SHIFT) |
- (NAND_CMD_SEQIN << FCR_CMD2_SHIFT);
-
out_be32(&lbc->fir,
- (FIR_OP_CW0 << FIR_OP0_SHIFT) |
+ (FIR_OP_CM0 << FIR_OP0_SHIFT) |
(FIR_OP_CM2 << FIR_OP1_SHIFT) |
(FIR_OP_CA << FIR_OP2_SHIFT) |
(FIR_OP_PA << FIR_OP3_SHIFT) |
(FIR_OP_WB << FIR_OP4_SHIFT) |
- (FIR_OP_CW1 << FIR_OP5_SHIFT));
+ (FIR_OP_CM3 << FIR_OP5_SHIFT) |
+ (FIR_OP_CW1 << FIR_OP6_SHIFT) |
+ (FIR_OP_RS << FIR_OP7_SHIFT));
if (column >= mtd->writesize) {
/* OOB area --> READOOB */
column -= mtd->writesize;
fcr |= NAND_CMD_READOOB << FCR_CMD0_SHIFT;
ctrl->oob = 1;
- } else if (column < 256) {
+ } else {
+ WARN_ON(column != 0);
/* First 256 bytes --> READ0 */
fcr |= NAND_CMD_READ0 << FCR_CMD0_SHIFT;
- } else {
- /* Second 256 bytes --> READ1 */
- fcr |= NAND_CMD_READ1 << FCR_CMD0_SHIFT;
}
}
{
struct fsl_elbc_mtd *priv = chip->priv;
struct fsl_elbc_ctrl *ctrl = priv->ctrl;
- struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
-
- if (ctrl->status != LTESR_CC)
- return NAND_STATUS_FAIL;
-
- /* Use READ_STATUS command, but wait for the device to be ready */
- ctrl->use_mdr = 0;
- out_be32(&lbc->fir,
- (FIR_OP_CW0 << FIR_OP0_SHIFT) |
- (FIR_OP_RBW << FIR_OP1_SHIFT));
- out_be32(&lbc->fcr, NAND_CMD_STATUS << FCR_CMD0_SHIFT);
- out_be32(&lbc->fbcr, 1);
- set_addr(mtd, 0, 0, 0);
- ctrl->read_bytes = 1;
-
- fsl_elbc_run_command(mtd);
if (ctrl->status != LTESR_CC)
return NAND_STATUS_FAIL;
/* The chip always seems to report that it is
* write-protected, even when it is not.
*/
- setbits8(ctrl->addr, NAND_STATUS_WP);
- return fsl_elbc_read_byte(mtd);
+ return (ctrl->mdr & 0xff) | NAND_STATUS_WP;
}
static int fsl_elbc_chip_init_tail(struct mtd_info *mtd)
{
struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
+ /*
+ * NAND transactions can tie up the bus for a long time, so set the
+ * bus timeout to max by clearing LBCR[BMT] (highest base counter
+ * value) and setting LBCR[BMTPS] to the highest prescaler value.
+ */
+ clrsetbits_be32(&lbc->lbcr, LBCR_BMT, 15);
+
/* clear event registers */
setbits32(&lbc->ltesr, LTESR_NAND_MASK);
out_be32(&lbc->lteatr, 0);
if (mchip_nr == -1) {
chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE);
- } else if (mchip_nr >= 0) {
+ } else if (mchip_nr >= 0 && mchip_nr < NAND_MAX_CHIPS) {
fun->mchip_number = mchip_nr;
chip->IO_ADDR_R = fun->io_base + fun->mchip_offsets[mchip_nr];
chip->IO_ADDR_W = chip->IO_ADDR_R;
#include <asm/mach/flash.h>
#include <mach/mxc_nand.h>
+#include <mach/hardware.h>
#define DRIVER_NAME "mxc_nand"
+#define nfc_is_v21() (cpu_is_mx25() || cpu_is_mx35())
+#define nfc_is_v1() (cpu_is_mx31() || cpu_is_mx27())
+
/* Addresses for NFC registers */
#define NFC_BUF_SIZE 0xE00
#define NFC_BUF_ADDR 0xE04
#define NFC_RSLTMAIN_AREA 0xE0E
#define NFC_RSLTSPARE_AREA 0xE10
#define NFC_WRPROT 0xE12
-#define NFC_UNLOCKSTART_BLKADDR 0xE14
-#define NFC_UNLOCKEND_BLKADDR 0xE16
+#define NFC_V1_UNLOCKSTART_BLKADDR 0xe14
+#define NFC_V1_UNLOCKEND_BLKADDR 0xe16
+#define NFC_V21_UNLOCKSTART_BLKADDR 0xe20
+#define NFC_V21_UNLOCKEND_BLKADDR 0xe22
#define NFC_NF_WRPRST 0xE18
#define NFC_CONFIG1 0xE1A
#define NFC_CONFIG2 0xE1C
-/* Addresses for NFC RAM BUFFER Main area 0 */
-#define MAIN_AREA0 0x000
-#define MAIN_AREA1 0x200
-#define MAIN_AREA2 0x400
-#define MAIN_AREA3 0x600
-
-/* Addresses for NFC SPARE BUFFER Spare area 0 */
-#define SPARE_AREA0 0x800
-#define SPARE_AREA1 0x810
-#define SPARE_AREA2 0x820
-#define SPARE_AREA3 0x830
-
/* Set INT to 0, FCMD to 1, rest to 0 in NFC_CONFIG2 Register
* for Command operation */
#define NFC_CMD 0x1
struct mtd_partition *parts;
struct device *dev;
+ void *spare0;
+ void *main_area0;
+ void *main_area1;
+
+ void __iomem *base;
void __iomem *regs;
- int spare_only;
int status_request;
- int pagesize_2k;
- uint16_t col_addr;
struct clk *clk;
int clk_act;
int irq;
wait_queue_head_t irq_waitq;
-};
-
-/* Define delays in microsec for NAND device operations */
-#define TROP_US_DELAY 2000
-/* Macros to get byte and bit positions of ECC */
-#define COLPOS(x) ((x) >> 3)
-#define BITPOS(x) ((x) & 0xf)
-/* Define single bit Error positions in Main & Spare area */
-#define MAIN_SINGLEBIT_ERROR 0x4
-#define SPARE_SINGLEBIT_ERROR 0x1
-
-/* OOB placement block for use with hardware ecc generation */
-static struct nand_ecclayout nand_hw_eccoob_8 = {
- .eccbytes = 5,
- .eccpos = {6, 7, 8, 9, 10},
- .oobfree = {{0, 5}, {11, 5}, }
+ uint8_t *data_buf;
+ unsigned int buf_start;
+ int spare_len;
};
-static struct nand_ecclayout nand_hw_eccoob_16 = {
+/* OOB placement block for use with hardware ecc generation */
+static struct nand_ecclayout nandv1_hw_eccoob_smallpage = {
.eccbytes = 5,
.eccpos = {6, 7, 8, 9, 10},
- .oobfree = {{0, 5}, {11, 5}, }
+ .oobfree = {{0, 5}, {12, 4}, }
};
-static struct nand_ecclayout nand_hw_eccoob_64 = {
+static struct nand_ecclayout nandv1_hw_eccoob_largepage = {
.eccbytes = 20,
.eccpos = {6, 7, 8, 9, 10, 22, 23, 24, 25, 26,
38, 39, 40, 41, 42, 54, 55, 56, 57, 58},
.oobfree = {{2, 4}, {11, 10}, {27, 10}, {43, 10}, {59, 5}, }
};
+/* OOB description for 512 byte pages with 16 byte OOB */
+static struct nand_ecclayout nandv2_hw_eccoob_smallpage = {
+ .eccbytes = 1 * 9,
+ .eccpos = {
+ 7, 8, 9, 10, 11, 12, 13, 14, 15
+ },
+ .oobfree = {
+ {.offset = 0, .length = 5}
+ }
+};
+
+/* OOB description for 2048 byte pages with 64 byte OOB */
+static struct nand_ecclayout nandv2_hw_eccoob_largepage = {
+ .eccbytes = 4 * 9,
+ .eccpos = {
+ 7, 8, 9, 10, 11, 12, 13, 14, 15,
+ 23, 24, 25, 26, 27, 28, 29, 30, 31,
+ 39, 40, 41, 42, 43, 44, 45, 46, 47,
+ 55, 56, 57, 58, 59, 60, 61, 62, 63
+ },
+ .oobfree = {
+ {.offset = 2, .length = 4},
+ {.offset = 16, .length = 7},
+ {.offset = 32, .length = 7},
+ {.offset = 48, .length = 7}
+ }
+};
+
#ifdef CONFIG_MTD_PARTITIONS
static const char *part_probes[] = { "RedBoot", "cmdlinepart", NULL };
#endif
/* This function polls the NANDFC to wait for the basic operation to
* complete by checking the INT bit of config2 register.
*/
-static void wait_op_done(struct mxc_nand_host *host, int max_retries,
- uint16_t param, int useirq)
+static void wait_op_done(struct mxc_nand_host *host, int useirq)
{
uint32_t tmp;
+ int max_retries = 2000;
if (useirq) {
if ((readw(host->regs + NFC_CONFIG2) & NFC_INT) == 0) {
udelay(1);
}
if (max_retries < 0)
- DEBUG(MTD_DEBUG_LEVEL0, "%s(%d): INT not set\n",
- __func__, param);
+ DEBUG(MTD_DEBUG_LEVEL0, "%s: INT not set\n",
+ __func__);
}
}
writew(NFC_CMD, host->regs + NFC_CONFIG2);
/* Wait for operation to complete */
- wait_op_done(host, TROP_US_DELAY, cmd, useirq);
+ wait_op_done(host, useirq);
}
/* This function sends an address (or partial address) to the
writew(NFC_ADDR, host->regs + NFC_CONFIG2);
/* Wait for operation to complete */
- wait_op_done(host, TROP_US_DELAY, addr, islast);
+ wait_op_done(host, islast);
}
-/* This function requests the NANDFC to initate the transfer
- * of data currently in the NANDFC RAM buffer to the NAND device. */
-static void send_prog_page(struct mxc_nand_host *host, uint8_t buf_id,
- int spare_only)
+static void send_page(struct mtd_info *mtd, unsigned int ops)
{
- DEBUG(MTD_DEBUG_LEVEL3, "send_prog_page (%d)\n", spare_only);
-
- /* NANDFC buffer 0 is used for page read/write */
- writew(buf_id, host->regs + NFC_BUF_ADDR);
-
- /* Configure spare or page+spare access */
- if (!host->pagesize_2k) {
- uint16_t config1 = readw(host->regs + NFC_CONFIG1);
- if (spare_only)
- config1 |= NFC_SP_EN;
- else
- config1 &= ~(NFC_SP_EN);
- writew(config1, host->regs + NFC_CONFIG1);
- }
+ struct nand_chip *nand_chip = mtd->priv;
+ struct mxc_nand_host *host = nand_chip->priv;
+ int bufs, i;
- writew(NFC_INPUT, host->regs + NFC_CONFIG2);
+ if (nfc_is_v1() && mtd->writesize > 512)
+ bufs = 4;
+ else
+ bufs = 1;
- /* Wait for operation to complete */
- wait_op_done(host, TROP_US_DELAY, spare_only, true);
-}
+ for (i = 0; i < bufs; i++) {
-/* Requests NANDFC to initated the transfer of data from the
- * NAND device into in the NANDFC ram buffer. */
-static void send_read_page(struct mxc_nand_host *host, uint8_t buf_id,
- int spare_only)
-{
- DEBUG(MTD_DEBUG_LEVEL3, "send_read_page (%d)\n", spare_only);
+ /* NANDFC buffer 0 is used for page read/write */
+ writew(i, host->regs + NFC_BUF_ADDR);
- /* NANDFC buffer 0 is used for page read/write */
- writew(buf_id, host->regs + NFC_BUF_ADDR);
+ writew(ops, host->regs + NFC_CONFIG2);
- /* Configure spare or page+spare access */
- if (!host->pagesize_2k) {
- uint32_t config1 = readw(host->regs + NFC_CONFIG1);
- if (spare_only)
- config1 |= NFC_SP_EN;
- else
- config1 &= ~NFC_SP_EN;
- writew(config1, host->regs + NFC_CONFIG1);
+ /* Wait for operation to complete */
+ wait_op_done(host, true);
}
-
- writew(NFC_OUTPUT, host->regs + NFC_CONFIG2);
-
- /* Wait for operation to complete */
- wait_op_done(host, TROP_US_DELAY, spare_only, true);
}
/* Request the NANDFC to perform a read of the NAND device ID. */
static void send_read_id(struct mxc_nand_host *host)
{
struct nand_chip *this = &host->nand;
- uint16_t tmp;
/* NANDFC buffer 0 is used for device ID output */
writew(0x0, host->regs + NFC_BUF_ADDR);
- /* Read ID into main buffer */
- tmp = readw(host->regs + NFC_CONFIG1);
- tmp &= ~NFC_SP_EN;
- writew(tmp, host->regs + NFC_CONFIG1);
-
writew(NFC_ID, host->regs + NFC_CONFIG2);
/* Wait for operation to complete */
- wait_op_done(host, TROP_US_DELAY, 0, true);
+ wait_op_done(host, true);
if (this->options & NAND_BUSWIDTH_16) {
- void __iomem *main_buf = host->regs + MAIN_AREA0;
+ void __iomem *main_buf = host->main_area0;
/* compress the ID info */
writeb(readb(main_buf + 2), main_buf + 1);
writeb(readb(main_buf + 4), main_buf + 2);
writeb(readb(main_buf + 8), main_buf + 4);
writeb(readb(main_buf + 10), main_buf + 5);
}
+ memcpy(host->data_buf, host->main_area0, 16);
}
/* This function requests the NANDFC to perform a read of the
* NAND device status and returns the current status. */
static uint16_t get_dev_status(struct mxc_nand_host *host)
{
- void __iomem *main_buf = host->regs + MAIN_AREA1;
+ void __iomem *main_buf = host->main_area1;
uint32_t store;
- uint16_t ret, tmp;
+ uint16_t ret;
/* Issue status request to NAND device */
/* store the main area1 first word, later do recovery */
* corruption of read/write buffer on status requests. */
writew(1, host->regs + NFC_BUF_ADDR);
- /* Read status into main buffer */
- tmp = readw(host->regs + NFC_CONFIG1);
- tmp &= ~NFC_SP_EN;
- writew(tmp, host->regs + NFC_CONFIG1);
-
writew(NFC_STATUS, host->regs + NFC_CONFIG2);
/* Wait for operation to complete */
- wait_op_done(host, TROP_US_DELAY, 0, true);
+ wait_op_done(host, true);
/* Status is placed in first word of main buffer */
/* get status, then recovery area 1 data */
{
struct nand_chip *nand_chip = mtd->priv;
struct mxc_nand_host *host = nand_chip->priv;
- uint8_t ret = 0;
- uint16_t col, rd_word;
- uint16_t __iomem *main_buf = host->regs + MAIN_AREA0;
- uint16_t __iomem *spare_buf = host->regs + SPARE_AREA0;
+ uint8_t ret;
/* Check for status request */
if (host->status_request)
return get_dev_status(host) & 0xFF;
- /* Get column for 16-bit access */
- col = host->col_addr >> 1;
-
- /* If we are accessing the spare region */
- if (host->spare_only)
- rd_word = readw(&spare_buf[col]);
- else
- rd_word = readw(&main_buf[col]);
-
- /* Pick upper/lower byte of word from RAM buffer */
- if (host->col_addr & 0x1)
- ret = (rd_word >> 8) & 0xFF;
- else
- ret = rd_word & 0xFF;
-
- /* Update saved column address */
- host->col_addr++;
+ ret = *(uint8_t *)(host->data_buf + host->buf_start);
+ host->buf_start++;
return ret;
}
{
struct nand_chip *nand_chip = mtd->priv;
struct mxc_nand_host *host = nand_chip->priv;
- uint16_t col, rd_word, ret;
- uint16_t __iomem *p;
-
- DEBUG(MTD_DEBUG_LEVEL3,
- "mxc_nand_read_word(col = %d)\n", host->col_addr);
-
- col = host->col_addr;
- /* Adjust saved column address */
- if (col < mtd->writesize && host->spare_only)
- col += mtd->writesize;
+ uint16_t ret;
- if (col < mtd->writesize)
- p = (host->regs + MAIN_AREA0) + (col >> 1);
- else
- p = (host->regs + SPARE_AREA0) + ((col - mtd->writesize) >> 1);
-
- if (col & 1) {
- rd_word = readw(p);
- ret = (rd_word >> 8) & 0xff;
- rd_word = readw(&p[1]);
- ret |= (rd_word << 8) & 0xff00;
-
- } else
- ret = readw(p);
-
- /* Update saved column address */
- host->col_addr = col + 2;
+ ret = *(uint16_t *)(host->data_buf + host->buf_start);
+ host->buf_start += 2;
return ret;
}
{
struct nand_chip *nand_chip = mtd->priv;
struct mxc_nand_host *host = nand_chip->priv;
- int n, col, i = 0;
-
- DEBUG(MTD_DEBUG_LEVEL3,
- "mxc_nand_write_buf(col = %d, len = %d)\n", host->col_addr,
- len);
-
- col = host->col_addr;
+ u16 col = host->buf_start;
+ int n = mtd->oobsize + mtd->writesize - col;
- /* Adjust saved column address */
- if (col < mtd->writesize && host->spare_only)
- col += mtd->writesize;
+ n = min(n, len);
- n = mtd->writesize + mtd->oobsize - col;
- n = min(len, n);
-
- DEBUG(MTD_DEBUG_LEVEL3,
- "%s:%d: col = %d, n = %d\n", __func__, __LINE__, col, n);
-
- while (n) {
- void __iomem *p;
-
- if (col < mtd->writesize)
- p = host->regs + MAIN_AREA0 + (col & ~3);
- else
- p = host->regs + SPARE_AREA0 -
- mtd->writesize + (col & ~3);
-
- DEBUG(MTD_DEBUG_LEVEL3, "%s:%d: p = %p\n", __func__,
- __LINE__, p);
-
- if (((col | (int)&buf[i]) & 3) || n < 16) {
- uint32_t data = 0;
-
- if (col & 3 || n < 4)
- data = readl(p);
-
- switch (col & 3) {
- case 0:
- if (n) {
- data = (data & 0xffffff00) |
- (buf[i++] << 0);
- n--;
- col++;
- }
- case 1:
- if (n) {
- data = (data & 0xffff00ff) |
- (buf[i++] << 8);
- n--;
- col++;
- }
- case 2:
- if (n) {
- data = (data & 0xff00ffff) |
- (buf[i++] << 16);
- n--;
- col++;
- }
- case 3:
- if (n) {
- data = (data & 0x00ffffff) |
- (buf[i++] << 24);
- n--;
- col++;
- }
- }
-
- writel(data, p);
- } else {
- int m = mtd->writesize - col;
+ memcpy(host->data_buf + col, buf, n);
- if (col >= mtd->writesize)
- m += mtd->oobsize;
-
- m = min(n, m) & ~3;
-
- DEBUG(MTD_DEBUG_LEVEL3,
- "%s:%d: n = %d, m = %d, i = %d, col = %d\n",
- __func__, __LINE__, n, m, i, col);
-
- memcpy(p, &buf[i], m);
- col += m;
- i += m;
- n -= m;
- }
- }
- /* Update saved column address */
- host->col_addr = col;
+ host->buf_start += n;
}
/* Read the data buffer from the NAND Flash. To read the data from NAND
{
struct nand_chip *nand_chip = mtd->priv;
struct mxc_nand_host *host = nand_chip->priv;
- int n, col, i = 0;
-
- DEBUG(MTD_DEBUG_LEVEL3,
- "mxc_nand_read_buf(col = %d, len = %d)\n", host->col_addr, len);
-
- col = host->col_addr;
+ u16 col = host->buf_start;
+ int n = mtd->oobsize + mtd->writesize - col;
- /* Adjust saved column address */
- if (col < mtd->writesize && host->spare_only)
- col += mtd->writesize;
+ n = min(n, len);
- n = mtd->writesize + mtd->oobsize - col;
- n = min(len, n);
-
- while (n) {
- void __iomem *p;
-
- if (col < mtd->writesize)
- p = host->regs + MAIN_AREA0 + (col & ~3);
- else
- p = host->regs + SPARE_AREA0 -
- mtd->writesize + (col & ~3);
-
- if (((col | (int)&buf[i]) & 3) || n < 16) {
- uint32_t data;
-
- data = readl(p);
- switch (col & 3) {
- case 0:
- if (n) {
- buf[i++] = (uint8_t) (data);
- n--;
- col++;
- }
- case 1:
- if (n) {
- buf[i++] = (uint8_t) (data >> 8);
- n--;
- col++;
- }
- case 2:
- if (n) {
- buf[i++] = (uint8_t) (data >> 16);
- n--;
- col++;
- }
- case 3:
- if (n) {
- buf[i++] = (uint8_t) (data >> 24);
- n--;
- col++;
- }
- }
- } else {
- int m = mtd->writesize - col;
-
- if (col >= mtd->writesize)
- m += mtd->oobsize;
-
- m = min(n, m) & ~3;
- memcpy(&buf[i], p, m);
- col += m;
- i += m;
- n -= m;
- }
- }
- /* Update saved column address */
- host->col_addr = col;
+ memcpy(buf, host->data_buf + col, len);
+ host->buf_start += len;
}
/* Used by the upper layer to verify the data in NAND Flash
struct nand_chip *nand_chip = mtd->priv;
struct mxc_nand_host *host = nand_chip->priv;
-#ifdef CONFIG_MTD_NAND_MXC_FORCE_CE
- if (chip > 0) {
- DEBUG(MTD_DEBUG_LEVEL0,
- "ERROR: Illegal chip select (chip = %d)\n", chip);
- return;
- }
-
- if (chip == -1) {
- writew(readw(host->regs + NFC_CONFIG1) & ~NFC_CE,
- host->regs + NFC_CONFIG1);
- return;
- }
-
- writew(readw(host->regs + NFC_CONFIG1) | NFC_CE,
- host->regs + NFC_CONFIG1);
-#endif
-
switch (chip) {
case -1:
/* Disable the NFC clock */
}
}
-/* Used by the upper layer to write command to NAND Flash for
- * different operations to be carried out on NAND Flash */
-static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
- int column, int page_addr)
+/*
+ * Function to transfer data to/from spare area.
+ */
+static void copy_spare(struct mtd_info *mtd, bool bfrom)
{
- struct nand_chip *nand_chip = mtd->priv;
- struct mxc_nand_host *host = nand_chip->priv;
- int useirq = true;
-
- DEBUG(MTD_DEBUG_LEVEL3,
- "mxc_nand_command (cmd = 0x%x, col = 0x%x, page = 0x%x)\n",
- command, column, page_addr);
-
- /* Reset command state information */
- host->status_request = false;
-
- /* Command pre-processing step */
- switch (command) {
-
- case NAND_CMD_STATUS:
- host->col_addr = 0;
- host->status_request = true;
- break;
-
- case NAND_CMD_READ0:
- host->col_addr = column;
- host->spare_only = false;
- useirq = false;
- break;
-
- case NAND_CMD_READOOB:
- host->col_addr = column;
- host->spare_only = true;
- useirq = false;
- if (host->pagesize_2k)
- command = NAND_CMD_READ0; /* only READ0 is valid */
- break;
-
- case NAND_CMD_SEQIN:
- if (column >= mtd->writesize) {
- /*
- * FIXME: before send SEQIN command for write OOB,
- * We must read one page out.
- * For K9F1GXX has no READ1 command to set current HW
- * pointer to spare area, we must write the whole page
- * including OOB together.
- */
- if (host->pagesize_2k)
- /* call ourself to read a page */
- mxc_nand_command(mtd, NAND_CMD_READ0, 0,
- page_addr);
-
- host->col_addr = column - mtd->writesize;
- host->spare_only = true;
-
- /* Set program pointer to spare region */
- if (!host->pagesize_2k)
- send_cmd(host, NAND_CMD_READOOB, false);
- } else {
- host->spare_only = false;
- host->col_addr = column;
-
- /* Set program pointer to page start */
- if (!host->pagesize_2k)
- send_cmd(host, NAND_CMD_READ0, false);
- }
- useirq = false;
- break;
-
- case NAND_CMD_PAGEPROG:
- send_prog_page(host, 0, host->spare_only);
-
- if (host->pagesize_2k) {
- /* data in 4 areas datas */
- send_prog_page(host, 1, host->spare_only);
- send_prog_page(host, 2, host->spare_only);
- send_prog_page(host, 3, host->spare_only);
- }
-
- break;
+ struct nand_chip *this = mtd->priv;
+ struct mxc_nand_host *host = this->priv;
+ u16 i, j;
+ u16 n = mtd->writesize >> 9;
+ u8 *d = host->data_buf + mtd->writesize;
+ u8 *s = host->spare0;
+ u16 t = host->spare_len;
+
+ j = (mtd->oobsize / n >> 1) << 1;
+
+ if (bfrom) {
+ for (i = 0; i < n - 1; i++)
+ memcpy(d + i * j, s + i * t, j);
+
+ /* the last section */
+ memcpy(d + i * j, s + i * t, mtd->oobsize - i * j);
+ } else {
+ for (i = 0; i < n - 1; i++)
+ memcpy(&s[i * t], &d[i * j], j);
- case NAND_CMD_ERASE1:
- useirq = false;
- break;
+ /* the last section */
+ memcpy(&s[i * t], &d[i * j], mtd->oobsize - i * j);
}
+}
- /* Write out the command to the device. */
- send_cmd(host, command, useirq);
+static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct mxc_nand_host *host = nand_chip->priv;
/* Write out column address, if necessary */
if (column != -1) {
* the full page.
*/
send_addr(host, 0, page_addr == -1);
- if (host->pagesize_2k)
+ if (mtd->writesize > 512)
/* another col addr cycle for 2k page */
send_addr(host, 0, false);
}
/* paddr_0 - p_addr_7 */
send_addr(host, (page_addr & 0xff), false);
- if (host->pagesize_2k) {
+ if (mtd->writesize > 512) {
if (mtd->size >= 0x10000000) {
/* paddr_8 - paddr_15 */
send_addr(host, (page_addr >> 8) & 0xff, false);
send_addr(host, (page_addr >> 8) & 0xff, true);
}
}
+}
+
+/* Used by the upper layer to write command to NAND Flash for
+ * different operations to be carried out on NAND Flash */
+static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
+ int column, int page_addr)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct mxc_nand_host *host = nand_chip->priv;
+
+ DEBUG(MTD_DEBUG_LEVEL3,
+ "mxc_nand_command (cmd = 0x%x, col = 0x%x, page = 0x%x)\n",
+ command, column, page_addr);
+
+ /* Reset command state information */
+ host->status_request = false;
- /* Command post-processing step */
+ /* Command pre-processing step */
switch (command) {
- case NAND_CMD_RESET:
+ case NAND_CMD_STATUS:
+ host->buf_start = 0;
+ host->status_request = true;
+
+ send_cmd(host, command, true);
+ mxc_do_addr_cycle(mtd, column, page_addr);
break;
- case NAND_CMD_READOOB:
case NAND_CMD_READ0:
- if (host->pagesize_2k) {
- /* send read confirm command */
+ case NAND_CMD_READOOB:
+ if (command == NAND_CMD_READ0)
+ host->buf_start = column;
+ else
+ host->buf_start = column + mtd->writesize;
+
+ if (mtd->writesize > 512)
+ command = NAND_CMD_READ0; /* only READ0 is valid */
+
+ send_cmd(host, command, false);
+ mxc_do_addr_cycle(mtd, column, page_addr);
+
+ if (mtd->writesize > 512)
send_cmd(host, NAND_CMD_READSTART, true);
- /* read for each AREA */
- send_read_page(host, 0, host->spare_only);
- send_read_page(host, 1, host->spare_only);
- send_read_page(host, 2, host->spare_only);
- send_read_page(host, 3, host->spare_only);
- } else
- send_read_page(host, 0, host->spare_only);
+
+ send_page(mtd, NFC_OUTPUT);
+
+ memcpy(host->data_buf, host->main_area0, mtd->writesize);
+ copy_spare(mtd, true);
break;
- case NAND_CMD_READID:
- host->col_addr = 0;
- send_read_id(host);
+ case NAND_CMD_SEQIN:
+ if (column >= mtd->writesize) {
+ /*
+ * FIXME: before send SEQIN command for write OOB,
+ * We must read one page out.
+ * For K9F1GXX has no READ1 command to set current HW
+ * pointer to spare area, we must write the whole page
+ * including OOB together.
+ */
+ if (mtd->writesize > 512)
+ /* call ourself to read a page */
+ mxc_nand_command(mtd, NAND_CMD_READ0, 0,
+ page_addr);
+
+ host->buf_start = column;
+
+ /* Set program pointer to spare region */
+ if (mtd->writesize == 512)
+ send_cmd(host, NAND_CMD_READOOB, false);
+ } else {
+ host->buf_start = column;
+
+ /* Set program pointer to page start */
+ if (mtd->writesize == 512)
+ send_cmd(host, NAND_CMD_READ0, false);
+ }
+
+ send_cmd(host, command, false);
+ mxc_do_addr_cycle(mtd, column, page_addr);
break;
case NAND_CMD_PAGEPROG:
+ memcpy(host->main_area0, host->data_buf, mtd->writesize);
+ copy_spare(mtd, false);
+ send_page(mtd, NFC_INPUT);
+ send_cmd(host, command, true);
+ mxc_do_addr_cycle(mtd, column, page_addr);
break;
- case NAND_CMD_STATUS:
+ case NAND_CMD_READID:
+ send_cmd(host, command, true);
+ mxc_do_addr_cycle(mtd, column, page_addr);
+ send_read_id(host);
+ host->buf_start = column;
break;
+ case NAND_CMD_ERASE1:
case NAND_CMD_ERASE2:
+ send_cmd(host, command, false);
+ mxc_do_addr_cycle(mtd, column, page_addr);
+
break;
}
}
-/* Define some generic bad / good block scan pattern which are used
- * while scanning a device for factory marked good / bad blocks. */
-static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
+/*
+ * The generic flash bbt decriptors overlap with our ecc
+ * hardware, so define some i.MX specific ones.
+ */
+static uint8_t bbt_pattern[] = { 'B', 'b', 't', '0' };
+static uint8_t mirror_pattern[] = { '1', 't', 'b', 'B' };
+
+static struct nand_bbt_descr bbt_main_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+ .offs = 0,
+ .len = 4,
+ .veroffs = 4,
+ .maxblocks = 4,
+ .pattern = bbt_pattern,
+};
-static struct nand_bbt_descr smallpage_memorybased = {
- .options = NAND_BBT_SCAN2NDPAGE,
- .offs = 5,
- .len = 1,
- .pattern = scan_ff_pattern
+static struct nand_bbt_descr bbt_mirror_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+ .offs = 0,
+ .len = 4,
+ .veroffs = 4,
+ .maxblocks = 4,
+ .pattern = mirror_pattern,
};
static int __init mxcnd_probe(struct platform_device *pdev)
struct resource *res;
uint16_t tmp;
int err = 0, nr_parts = 0;
+ struct nand_ecclayout *oob_smallpage, *oob_largepage;
/* Allocate memory for MTD device structure and private data */
- host = kzalloc(sizeof(struct mxc_nand_host), GFP_KERNEL);
+ host = kzalloc(sizeof(struct mxc_nand_host) + NAND_MAX_PAGESIZE +
+ NAND_MAX_OOBSIZE, GFP_KERNEL);
if (!host)
return -ENOMEM;
+ host->data_buf = (uint8_t *)(host + 1);
+
host->dev = &pdev->dev;
/* structures must be linked */
this = &host->nand;
mtd->priv = this;
mtd->owner = THIS_MODULE;
mtd->dev.parent = &pdev->dev;
- mtd->name = "mxc_nand";
+ mtd->name = DRIVER_NAME;
/* 50 us command delay time */
this->chip_delay = 5;
goto eres;
}
- host->regs = ioremap(res->start, res->end - res->start + 1);
- if (!host->regs) {
+ host->base = ioremap(res->start, resource_size(res));
+ if (!host->base) {
err = -ENOMEM;
goto eres;
}
+ host->main_area0 = host->base;
+ host->main_area1 = host->base + 0x200;
+
+ if (nfc_is_v21()) {
+ host->regs = host->base + 0x1000;
+ host->spare0 = host->base + 0x1000;
+ host->spare_len = 64;
+ oob_smallpage = &nandv2_hw_eccoob_smallpage;
+ oob_largepage = &nandv2_hw_eccoob_largepage;
+ } else if (nfc_is_v1()) {
+ host->regs = host->base;
+ host->spare0 = host->base + 0x800;
+ host->spare_len = 16;
+ oob_smallpage = &nandv1_hw_eccoob_smallpage;
+ oob_largepage = &nandv1_hw_eccoob_largepage;
+ } else
+ BUG();
+
+ /* disable interrupt and spare enable */
tmp = readw(host->regs + NFC_CONFIG1);
tmp |= NFC_INT_MSK;
+ tmp &= ~NFC_SP_EN;
writew(tmp, host->regs + NFC_CONFIG1);
init_waitqueue_head(&host->irq_waitq);
host->irq = platform_get_irq(pdev, 0);
- err = request_irq(host->irq, mxc_nfc_irq, 0, "mxc_nd", host);
+ err = request_irq(host->irq, mxc_nfc_irq, 0, DRIVER_NAME, host);
if (err)
goto eirq;
+ /* Reset NAND */
+ this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
+
+ /* preset operation */
+ /* Unlock the internal RAM Buffer */
+ writew(0x2, host->regs + NFC_CONFIG);
+
+ /* Blocks to be unlocked */
+ if (nfc_is_v21()) {
+ writew(0x0, host->regs + NFC_V21_UNLOCKSTART_BLKADDR);
+ writew(0xffff, host->regs + NFC_V21_UNLOCKEND_BLKADDR);
+ this->ecc.bytes = 9;
+ } else if (nfc_is_v1()) {
+ writew(0x0, host->regs + NFC_V1_UNLOCKSTART_BLKADDR);
+ writew(0x4000, host->regs + NFC_V1_UNLOCKEND_BLKADDR);
+ this->ecc.bytes = 3;
+ } else
+ BUG();
+
+ /* Unlock Block Command for given address range */
+ writew(0x4, host->regs + NFC_WRPROT);
+
+ this->ecc.size = 512;
+ this->ecc.layout = oob_smallpage;
+
if (pdata->hw_ecc) {
this->ecc.calculate = mxc_nand_calculate_ecc;
this->ecc.hwctl = mxc_nand_enable_hwecc;
this->ecc.correct = mxc_nand_correct_data;
this->ecc.mode = NAND_ECC_HW;
- this->ecc.size = 512;
- this->ecc.bytes = 3;
tmp = readw(host->regs + NFC_CONFIG1);
tmp |= NFC_ECC_EN;
writew(tmp, host->regs + NFC_CONFIG1);
} else {
- this->ecc.size = 512;
- this->ecc.bytes = 3;
- this->ecc.layout = &nand_hw_eccoob_8;
this->ecc.mode = NAND_ECC_SOFT;
tmp = readw(host->regs + NFC_CONFIG1);
tmp &= ~NFC_ECC_EN;
writew(tmp, host->regs + NFC_CONFIG1);
}
- /* Reset NAND */
- this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
-
- /* preset operation */
- /* Unlock the internal RAM Buffer */
- writew(0x2, host->regs + NFC_CONFIG);
-
- /* Blocks to be unlocked */
- writew(0x0, host->regs + NFC_UNLOCKSTART_BLKADDR);
- writew(0x4000, host->regs + NFC_UNLOCKEND_BLKADDR);
-
- /* Unlock Block Command for given address range */
- writew(0x4, host->regs + NFC_WRPROT);
-
/* NAND bus width determines access funtions used by upper layer */
- if (pdata->width == 2) {
+ if (pdata->width == 2)
this->options |= NAND_BUSWIDTH_16;
- this->ecc.layout = &nand_hw_eccoob_16;
+
+ if (pdata->flash_bbt) {
+ this->bbt_td = &bbt_main_descr;
+ this->bbt_md = &bbt_mirror_descr;
+ /* update flash based bbt */
+ this->options |= NAND_USE_FLASH_BBT;
}
/* first scan to find the device and get the page size */
goto escan;
}
- if (mtd->writesize == 2048) {
- host->pagesize_2k = 1;
- this->badblock_pattern = &smallpage_memorybased;
- }
-
- if (this->ecc.mode == NAND_ECC_HW) {
- switch (mtd->oobsize) {
- case 8:
- this->ecc.layout = &nand_hw_eccoob_8;
- break;
- case 16:
- this->ecc.layout = &nand_hw_eccoob_16;
- break;
- case 64:
- this->ecc.layout = &nand_hw_eccoob_64;
- break;
- default:
- /* page size not handled by HW ECC */
- /* switching back to soft ECC */
- this->ecc.size = 512;
- this->ecc.bytes = 3;
- this->ecc.layout = &nand_hw_eccoob_8;
- this->ecc.mode = NAND_ECC_SOFT;
- this->ecc.calculate = NULL;
- this->ecc.correct = NULL;
- this->ecc.hwctl = NULL;
- tmp = readw(host->regs + NFC_CONFIG1);
- tmp &= ~NFC_ECC_EN;
- writew(tmp, host->regs + NFC_CONFIG1);
- break;
- }
- }
+ if (mtd->writesize == 2048)
+ this->ecc.layout = oob_largepage;
/* second phase scan */
if (nand_scan_tail(mtd)) {
escan:
free_irq(host->irq, host);
eirq:
- iounmap(host->regs);
+ iounmap(host->base);
eres:
clk_put(host->clk);
eclk:
nand_release(&host->mtd);
free_irq(host->irq, host);
- iounmap(host->regs);
+ iounmap(host->base);
kfree(host);
return 0;
.driver = {
.name = DRIVER_NAME,
},
- .remove = __exit_p(mxcnd_remove),
+ .remove = __devexit_p(mxcnd_remove),
.suspend = mxcnd_suspend,
.resume = mxcnd_resume,
};
return nand_isbad_bbt(mtd, ofs, allowbbt);
}
+/**
+ * panic_nand_wait_ready - [GENERIC] Wait for the ready pin after commands.
+ * @mtd: MTD device structure
+ * @timeo: Timeout
+ *
+ * Helper function for nand_wait_ready used when needing to wait in interrupt
+ * context.
+ */
+static void panic_nand_wait_ready(struct mtd_info *mtd, unsigned long timeo)
+{
+ struct nand_chip *chip = mtd->priv;
+ int i;
+
+ /* Wait for the device to get ready */
+ for (i = 0; i < timeo; i++) {
+ if (chip->dev_ready(mtd))
+ break;
+ touch_softlockup_watchdog();
+ mdelay(1);
+ }
+}
+
/*
* Wait for the ready pin, after a command
* The timeout is catched later.
struct nand_chip *chip = mtd->priv;
unsigned long timeo = jiffies + 2;
+ /* 400ms timeout */
+ if (in_interrupt() || oops_in_progress)
+ return panic_nand_wait_ready(mtd, 400);
+
led_trigger_event(nand_led_trigger, LED_FULL);
/* wait until command is processed or timeout occures */
do {
nand_wait_ready(mtd);
}
+/**
+ * panic_nand_get_device - [GENERIC] Get chip for selected access
+ * @chip: the nand chip descriptor
+ * @mtd: MTD device structure
+ * @new_state: the state which is requested
+ *
+ * Used when in panic, no locks are taken.
+ */
+static void panic_nand_get_device(struct nand_chip *chip,
+ struct mtd_info *mtd, int new_state)
+{
+ /* Hardware controller shared among independend devices */
+ chip->controller->active = chip;
+ chip->state = new_state;
+}
+
/**
* nand_get_device - [GENERIC] Get chip for selected access
* @chip: the nand chip descriptor
return 0;
}
if (new_state == FL_PM_SUSPENDED) {
- spin_unlock(lock);
- return (chip->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN;
+ if (chip->controller->active->state == FL_PM_SUSPENDED) {
+ chip->state = FL_PM_SUSPENDED;
+ spin_unlock(lock);
+ return 0;
+ } else {
+ spin_unlock(lock);
+ return -EAGAIN;
+ }
}
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(wq, &wait);
goto retry;
}
+/**
+ * panic_nand_wait - [GENERIC] wait until the command is done
+ * @mtd: MTD device structure
+ * @chip: NAND chip structure
+ * @timeo: Timeout
+ *
+ * Wait for command done. This is a helper function for nand_wait used when
+ * we are in interrupt context. May happen when in panic and trying to write
+ * an oops trough mtdoops.
+ */
+static void panic_nand_wait(struct mtd_info *mtd, struct nand_chip *chip,
+ unsigned long timeo)
+{
+ int i;
+ for (i = 0; i < timeo; i++) {
+ if (chip->dev_ready) {
+ if (chip->dev_ready(mtd))
+ break;
+ } else {
+ if (chip->read_byte(mtd) & NAND_STATUS_READY)
+ break;
+ }
+ mdelay(1);
+ }
+}
+
/**
* nand_wait - [DEFAULT] wait until the command is done
* @mtd: MTD device structure
else
chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
- while (time_before(jiffies, timeo)) {
- if (chip->dev_ready) {
- if (chip->dev_ready(mtd))
- break;
- } else {
- if (chip->read_byte(mtd) & NAND_STATUS_READY)
- break;
+ if (in_interrupt() || oops_in_progress)
+ panic_nand_wait(mtd, chip, timeo);
+ else {
+ while (time_before(jiffies, timeo)) {
+ if (chip->dev_ready) {
+ if (chip->dev_ready(mtd))
+ break;
+ } else {
+ if (chip->read_byte(mtd) & NAND_STATUS_READY)
+ break;
+ }
+ cond_resched();
}
- cond_resched();
}
led_trigger_event(nand_led_trigger, LED_OFF);
return ret;
}
+/**
+ * panic_nand_write - [MTD Interface] NAND write with ECC
+ * @mtd: MTD device structure
+ * @to: offset to write to
+ * @len: number of bytes to write
+ * @retlen: pointer to variable to store the number of written bytes
+ * @buf: the data to write
+ *
+ * NAND write with ECC. Used when performing writes in interrupt context, this
+ * may for example be called by mtdoops when writing an oops while in panic.
+ */
+static int panic_nand_write(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const uint8_t *buf)
+{
+ struct nand_chip *chip = mtd->priv;
+ int ret;
+
+ /* Do not allow reads past end of device */
+ if ((to + len) > mtd->size)
+ return -EINVAL;
+ if (!len)
+ return 0;
+
+ /* Wait for the device to get ready. */
+ panic_nand_wait(mtd, chip, 400);
+
+ /* Grab the device. */
+ panic_nand_get_device(chip, mtd, FL_WRITING);
+
+ chip->ops.len = len;
+ chip->ops.datbuf = (uint8_t *)buf;
+ chip->ops.oobbuf = NULL;
+
+ ret = nand_do_write_ops(mtd, to, &chip->ops);
+
+ *retlen = chip->ops.retlen;
+ return ret;
+}
+
/**
* nand_write - [MTD Interface] NAND write with ECC
* @mtd: MTD device structure
type = nand_get_flash_type(mtd, chip, busw, &nand_maf_id);
if (IS_ERR(type)) {
- printk(KERN_WARNING "No NAND device found!!!\n");
+ if (!(chip->options & NAND_SCAN_SILENT_NODEV))
+ printk(KERN_WARNING "No NAND device found.\n");
chip->select_chip(mtd, -1);
return PTR_ERR(type);
}
mtd->unpoint = NULL;
mtd->read = nand_read;
mtd->write = nand_write;
+ mtd->panic_write = panic_nand_write;
mtd->read_oob = nand_read_oob;
mtd->write_oob = nand_write_oob;
mtd->sync = nand_sync;
--- /dev/null
+/*****************************************************************************
+* Copyright 2004 - 2009 Broadcom Corporation. All rights reserved.
+*
+* Unless you and Broadcom execute a separate written software license
+* agreement governing use of this software, this software is licensed to you
+* under the terms of the GNU General Public License version 2, available at
+* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
+*
+* Notwithstanding the above, under no circumstances may you combine this
+* software in any way with any other Broadcom software provided under a
+* license other than the GPL, without Broadcom's express prior written
+* consent.
+*****************************************************************************/
+
+/* ---- Include Files ---------------------------------------------------- */
+#include <mach/reg_umi.h>
+#include "nand_bcm_umi.h"
+#ifdef BOOT0_BUILD
+#include <uart.h>
+#endif
+
+/* ---- External Variable Declarations ----------------------------------- */
+/* ---- External Function Prototypes ------------------------------------- */
+/* ---- Public Variables ------------------------------------------------- */
+/* ---- Private Constants and Types -------------------------------------- */
+/* ---- Private Function Prototypes -------------------------------------- */
+/* ---- Private Variables ------------------------------------------------ */
+/* ---- Private Functions ------------------------------------------------ */
+
+#if NAND_ECC_BCH
+/****************************************************************************
+* nand_bch_ecc_flip_bit - Routine to flip an errored bit
+*
+* PURPOSE:
+* This is a helper routine that flips the bit (0 -> 1 or 1 -> 0) of the
+* errored bit specified
+*
+* PARAMETERS:
+* datap - Container that holds the 512 byte data
+* errorLocation - Location of the bit that needs to be flipped
+*
+* RETURNS:
+* None
+****************************************************************************/
+static void nand_bcm_umi_bch_ecc_flip_bit(uint8_t *datap, int errorLocation)
+{
+ int locWithinAByte = (errorLocation & REG_UMI_BCH_ERR_LOC_BYTE) >> 0;
+ int locWithinAWord = (errorLocation & REG_UMI_BCH_ERR_LOC_WORD) >> 3;
+ int locWithinAPage = (errorLocation & REG_UMI_BCH_ERR_LOC_PAGE) >> 5;
+
+ uint8_t errorByte = 0;
+ uint8_t byteMask = 1 << locWithinAByte;
+
+ /* BCH uses big endian, need to change the location
+ * bits to little endian */
+ locWithinAWord = 3 - locWithinAWord;
+
+ errorByte = datap[locWithinAPage * sizeof(uint32_t) + locWithinAWord];
+
+#ifdef BOOT0_BUILD
+ puthexs("\nECC Correct Offset: ",
+ locWithinAPage * sizeof(uint32_t) + locWithinAWord);
+ puthexs(" errorByte:", errorByte);
+ puthex8(" Bit: ", locWithinAByte);
+#endif
+
+ if (errorByte & byteMask) {
+ /* bit needs to be cleared */
+ errorByte &= ~byteMask;
+ } else {
+ /* bit needs to be set */
+ errorByte |= byteMask;
+ }
+
+ /* write back the value with the fixed bit */
+ datap[locWithinAPage * sizeof(uint32_t) + locWithinAWord] = errorByte;
+}
+
+/****************************************************************************
+* nand_correct_page_bch - Routine to correct bit errors when reading NAND
+*
+* PURPOSE:
+* This routine reads the BCH registers to determine if there are any bit
+* errors during the read of the last 512 bytes of data + ECC bytes. If
+* errors exists, the routine fixes it.
+*
+* PARAMETERS:
+* datap - Container that holds the 512 byte data
+*
+* RETURNS:
+* 0 or greater = Number of errors corrected
+* (No errors are found or errors have been fixed)
+* -1 = Error(s) cannot be fixed
+****************************************************************************/
+int nand_bcm_umi_bch_correct_page(uint8_t *datap, uint8_t *readEccData,
+ int numEccBytes)
+{
+ int numErrors;
+ int errorLocation;
+ int idx;
+ uint32_t regValue;
+
+ /* wait for read ECC to be valid */
+ regValue = nand_bcm_umi_bch_poll_read_ecc_calc();
+
+ /*
+ * read the control status register to determine if there
+ * are error'ed bits
+ * see if errors are correctible
+ */
+ if ((regValue & REG_UMI_BCH_CTRL_STATUS_UNCORR_ERR) > 0) {
+ int i;
+
+ for (i = 0; i < numEccBytes; i++) {
+ if (readEccData[i] != 0xff) {
+ /* errors cannot be fixed, return -1 */
+ return -1;
+ }
+ }
+ /* If ECC is unprogrammed then we can't correct,
+ * assume everything OK */
+ return 0;
+ }
+
+ if ((regValue & REG_UMI_BCH_CTRL_STATUS_CORR_ERR) == 0) {
+ /* no errors */
+ return 0;
+ }
+
+ /*
+ * Fix errored bits by doing the following:
+ * 1. Read the number of errors in the control and status register
+ * 2. Read the error location registers that corresponds to the number
+ * of errors reported
+ * 3. Invert the bit in the data
+ */
+ numErrors = (regValue & REG_UMI_BCH_CTRL_STATUS_NB_CORR_ERROR) >> 20;
+
+ for (idx = 0; idx < numErrors; idx++) {
+ errorLocation =
+ REG_UMI_BCH_ERR_LOC_ADDR(idx) & REG_UMI_BCH_ERR_LOC_MASK;
+
+ /* Flip bit */
+ nand_bcm_umi_bch_ecc_flip_bit(datap, errorLocation);
+ }
+ /* Errors corrected */
+ return numErrors;
+}
+#endif
--- /dev/null
+/*****************************************************************************
+* Copyright 2003 - 2009 Broadcom Corporation. All rights reserved.
+*
+* Unless you and Broadcom execute a separate written software license
+* agreement governing use of this software, this software is licensed to you
+* under the terms of the GNU General Public License version 2, available at
+* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
+*
+* Notwithstanding the above, under no circumstances may you combine this
+* software in any way with any other Broadcom software provided under a
+* license other than the GPL, without Broadcom's express prior written
+* consent.
+*****************************************************************************/
+#ifndef NAND_BCM_UMI_H
+#define NAND_BCM_UMI_H
+
+/* ---- Include Files ---------------------------------------------------- */
+#include <mach/reg_umi.h>
+#include <mach/reg_nand.h>
+#include <cfg_global.h>
+
+/* ---- Constants and Types ---------------------------------------------- */
+#if (CFG_GLOBAL_CHIP_FAMILY == CFG_GLOBAL_CHIP_FAMILY_BCMRING)
+#define NAND_ECC_BCH (CFG_GLOBAL_CHIP_REV > 0xA0)
+#else
+#define NAND_ECC_BCH 0
+#endif
+
+#define CFG_GLOBAL_NAND_ECC_BCH_NUM_BYTES 13
+
+#if NAND_ECC_BCH
+#ifdef BOOT0_BUILD
+#define NAND_ECC_NUM_BYTES 13
+#else
+#define NAND_ECC_NUM_BYTES CFG_GLOBAL_NAND_ECC_BCH_NUM_BYTES
+#endif
+#else
+#define NAND_ECC_NUM_BYTES 3
+#endif
+
+#define NAND_DATA_ACCESS_SIZE 512
+
+/* ---- Variable Externs ------------------------------------------ */
+/* ---- Function Prototypes --------------------------------------- */
+int nand_bcm_umi_bch_correct_page(uint8_t *datap, uint8_t *readEccData,
+ int numEccBytes);
+
+/* Check in device is ready */
+static inline int nand_bcm_umi_dev_ready(void)
+{
+ return REG_UMI_NAND_RCSR & REG_UMI_NAND_RCSR_RDY;
+}
+
+/* Wait until device is ready */
+static inline void nand_bcm_umi_wait_till_ready(void)
+{
+ while (nand_bcm_umi_dev_ready() == 0)
+ ;
+}
+
+/* Enable Hamming ECC */
+static inline void nand_bcm_umi_hamming_enable_hwecc(void)
+{
+ /* disable and reset ECC, 512 byte page */
+ REG_UMI_NAND_ECC_CSR &= ~(REG_UMI_NAND_ECC_CSR_ECC_ENABLE |
+ REG_UMI_NAND_ECC_CSR_256BYTE);
+ /* enable ECC */
+ REG_UMI_NAND_ECC_CSR |= REG_UMI_NAND_ECC_CSR_ECC_ENABLE;
+}
+
+#if NAND_ECC_BCH
+/* BCH ECC specifics */
+#define ECC_BITS_PER_CORRECTABLE_BIT 13
+
+/* Enable BCH Read ECC */
+static inline void nand_bcm_umi_bch_enable_read_hwecc(void)
+{
+ /* disable and reset ECC */
+ REG_UMI_BCH_CTRL_STATUS = REG_UMI_BCH_CTRL_STATUS_RD_ECC_VALID;
+ /* Turn on ECC */
+ REG_UMI_BCH_CTRL_STATUS = REG_UMI_BCH_CTRL_STATUS_ECC_RD_EN;
+}
+
+/* Enable BCH Write ECC */
+static inline void nand_bcm_umi_bch_enable_write_hwecc(void)
+{
+ /* disable and reset ECC */
+ REG_UMI_BCH_CTRL_STATUS = REG_UMI_BCH_CTRL_STATUS_WR_ECC_VALID;
+ /* Turn on ECC */
+ REG_UMI_BCH_CTRL_STATUS = REG_UMI_BCH_CTRL_STATUS_ECC_WR_EN;
+}
+
+/* Config number of BCH ECC bytes */
+static inline void nand_bcm_umi_bch_config_ecc(uint8_t numEccBytes)
+{
+ uint32_t nValue;
+ uint32_t tValue;
+ uint32_t kValue;
+ uint32_t numBits = numEccBytes * 8;
+
+ /* disable and reset ECC */
+ REG_UMI_BCH_CTRL_STATUS =
+ REG_UMI_BCH_CTRL_STATUS_WR_ECC_VALID |
+ REG_UMI_BCH_CTRL_STATUS_RD_ECC_VALID;
+
+ /* Every correctible bit requires 13 ECC bits */
+ tValue = (uint32_t) (numBits / ECC_BITS_PER_CORRECTABLE_BIT);
+
+ /* Total data in number of bits for generating and computing BCH ECC */
+ nValue = (NAND_DATA_ACCESS_SIZE + numEccBytes) * 8;
+
+ /* K parameter is used internally. K = N - (T * 13) */
+ kValue = nValue - (tValue * ECC_BITS_PER_CORRECTABLE_BIT);
+
+ /* Write the settings */
+ REG_UMI_BCH_N = nValue;
+ REG_UMI_BCH_T = tValue;
+ REG_UMI_BCH_K = kValue;
+}
+
+/* Pause during ECC read calculation to skip bytes in OOB */
+static inline void nand_bcm_umi_bch_pause_read_ecc_calc(void)
+{
+ REG_UMI_BCH_CTRL_STATUS =
+ REG_UMI_BCH_CTRL_STATUS_ECC_RD_EN |
+ REG_UMI_BCH_CTRL_STATUS_PAUSE_ECC_DEC;
+}
+
+/* Resume during ECC read calculation after skipping bytes in OOB */
+static inline void nand_bcm_umi_bch_resume_read_ecc_calc(void)
+{
+ REG_UMI_BCH_CTRL_STATUS = REG_UMI_BCH_CTRL_STATUS_ECC_RD_EN;
+}
+
+/* Poll read ECC calc to check when hardware completes */
+static inline uint32_t nand_bcm_umi_bch_poll_read_ecc_calc(void)
+{
+ uint32_t regVal;
+
+ do {
+ /* wait for ECC to be valid */
+ regVal = REG_UMI_BCH_CTRL_STATUS;
+ } while ((regVal & REG_UMI_BCH_CTRL_STATUS_RD_ECC_VALID) == 0);
+
+ return regVal;
+}
+
+/* Poll write ECC calc to check when hardware completes */
+static inline void nand_bcm_umi_bch_poll_write_ecc_calc(void)
+{
+ /* wait for ECC to be valid */
+ while ((REG_UMI_BCH_CTRL_STATUS & REG_UMI_BCH_CTRL_STATUS_WR_ECC_VALID)
+ == 0)
+ ;
+}
+
+/* Read the OOB and ECC, for kernel write OOB to a buffer */
+#if defined(__KERNEL__) && !defined(STANDALONE)
+static inline void nand_bcm_umi_bch_read_oobEcc(uint32_t pageSize,
+ uint8_t *eccCalc, int numEccBytes, uint8_t *oobp)
+#else
+static inline void nand_bcm_umi_bch_read_oobEcc(uint32_t pageSize,
+ uint8_t *eccCalc, int numEccBytes)
+#endif
+{
+ int eccPos = 0;
+ int numToRead = 16; /* There are 16 bytes per sector in the OOB */
+
+ /* ECC is already paused when this function is called */
+
+ if (pageSize == NAND_DATA_ACCESS_SIZE) {
+ while (numToRead > numEccBytes) {
+ /* skip free oob region */
+#if defined(__KERNEL__) && !defined(STANDALONE)
+ *oobp++ = REG_NAND_DATA8;
+#else
+ REG_NAND_DATA8;
+#endif
+ numToRead--;
+ }
+
+ /* read ECC bytes before BI */
+ nand_bcm_umi_bch_resume_read_ecc_calc();
+
+ while (numToRead > 11) {
+#if defined(__KERNEL__) && !defined(STANDALONE)
+ *oobp = REG_NAND_DATA8;
+ eccCalc[eccPos++] = *oobp;
+ oobp++;
+#else
+ eccCalc[eccPos++] = REG_NAND_DATA8;
+#endif
+ }
+
+ nand_bcm_umi_bch_pause_read_ecc_calc();
+
+ if (numToRead == 11) {
+ /* read BI */
+#if defined(__KERNEL__) && !defined(STANDALONE)
+ *oobp++ = REG_NAND_DATA8;
+#else
+ REG_NAND_DATA8;
+#endif
+ numToRead--;
+ }
+
+ /* read ECC bytes */
+ nand_bcm_umi_bch_resume_read_ecc_calc();
+ while (numToRead) {
+#if defined(__KERNEL__) && !defined(STANDALONE)
+ *oobp = REG_NAND_DATA8;
+ eccCalc[eccPos++] = *oobp;
+ oobp++;
+#else
+ eccCalc[eccPos++] = REG_NAND_DATA8;
+#endif
+ numToRead--;
+ }
+ } else {
+ /* skip BI */
+#if defined(__KERNEL__) && !defined(STANDALONE)
+ *oobp++ = REG_NAND_DATA8;
+#else
+ REG_NAND_DATA8;
+#endif
+ numToRead--;
+
+ while (numToRead > numEccBytes) {
+ /* skip free oob region */
+#if defined(__KERNEL__) && !defined(STANDALONE)
+ *oobp++ = REG_NAND_DATA8;
+#else
+ REG_NAND_DATA8;
+#endif
+ numToRead--;
+ }
+
+ /* read ECC bytes */
+ nand_bcm_umi_bch_resume_read_ecc_calc();
+ while (numToRead) {
+#if defined(__KERNEL__) && !defined(STANDALONE)
+ *oobp = REG_NAND_DATA8;
+ eccCalc[eccPos++] = *oobp;
+ oobp++;
+#else
+ eccCalc[eccPos++] = REG_NAND_DATA8;
+#endif
+ numToRead--;
+ }
+ }
+}
+
+/* Helper function to write ECC */
+static inline void NAND_BCM_UMI_ECC_WRITE(int numEccBytes, int eccBytePos,
+ uint8_t *oobp, uint8_t eccVal)
+{
+ if (eccBytePos <= numEccBytes)
+ *oobp = eccVal;
+}
+
+/* Write OOB with ECC */
+static inline void nand_bcm_umi_bch_write_oobEcc(uint32_t pageSize,
+ uint8_t *oobp, int numEccBytes)
+{
+ uint32_t eccVal = 0xffffffff;
+
+ /* wait for write ECC to be valid */
+ nand_bcm_umi_bch_poll_write_ecc_calc();
+
+ /*
+ ** Get the hardware ecc from the 32-bit result registers.
+ ** Read after 512 byte accesses. Format B3B2B1B0
+ ** where B3 = ecc3, etc.
+ */
+
+ if (pageSize == NAND_DATA_ACCESS_SIZE) {
+ /* Now fill in the ECC bytes */
+ if (numEccBytes >= 13)
+ eccVal = REG_UMI_BCH_WR_ECC_3;
+
+ /* Usually we skip CM in oob[0,1] */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 15, &oobp[0],
+ (eccVal >> 16) & 0xff);
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 14, &oobp[1],
+ (eccVal >> 8) & 0xff);
+
+ /* Write ECC in oob[2,3,4] */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 13, &oobp[2],
+ eccVal & 0xff); /* ECC 12 */
+
+ if (numEccBytes >= 9)
+ eccVal = REG_UMI_BCH_WR_ECC_2;
+
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 12, &oobp[3],
+ (eccVal >> 24) & 0xff); /* ECC11 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 11, &oobp[4],
+ (eccVal >> 16) & 0xff); /* ECC10 */
+
+ /* Always Skip BI in oob[5] */
+ } else {
+ /* Always Skip BI in oob[0] */
+
+ /* Now fill in the ECC bytes */
+ if (numEccBytes >= 13)
+ eccVal = REG_UMI_BCH_WR_ECC_3;
+
+ /* Usually skip CM in oob[1,2] */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 15, &oobp[1],
+ (eccVal >> 16) & 0xff);
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 14, &oobp[2],
+ (eccVal >> 8) & 0xff);
+
+ /* Write ECC in oob[3-15] */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 13, &oobp[3],
+ eccVal & 0xff); /* ECC12 */
+
+ if (numEccBytes >= 9)
+ eccVal = REG_UMI_BCH_WR_ECC_2;
+
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 12, &oobp[4],
+ (eccVal >> 24) & 0xff); /* ECC11 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 11, &oobp[5],
+ (eccVal >> 16) & 0xff); /* ECC10 */
+ }
+
+ /* Fill in the remainder of ECC locations */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 10, &oobp[6],
+ (eccVal >> 8) & 0xff); /* ECC9 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 9, &oobp[7],
+ eccVal & 0xff); /* ECC8 */
+
+ if (numEccBytes >= 5)
+ eccVal = REG_UMI_BCH_WR_ECC_1;
+
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 8, &oobp[8],
+ (eccVal >> 24) & 0xff); /* ECC7 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 7, &oobp[9],
+ (eccVal >> 16) & 0xff); /* ECC6 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 6, &oobp[10],
+ (eccVal >> 8) & 0xff); /* ECC5 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 5, &oobp[11],
+ eccVal & 0xff); /* ECC4 */
+
+ if (numEccBytes >= 1)
+ eccVal = REG_UMI_BCH_WR_ECC_0;
+
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 4, &oobp[12],
+ (eccVal >> 24) & 0xff); /* ECC3 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 3, &oobp[13],
+ (eccVal >> 16) & 0xff); /* ECC2 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 2, &oobp[14],
+ (eccVal >> 8) & 0xff); /* ECC1 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 1, &oobp[15],
+ eccVal & 0xff); /* ECC0 */
+}
+#endif
+
+#endif /* NAND_BCM_UMI_H */
};
/**
- * nand_calculate_ecc - [NAND Interface] Calculate 3-byte ECC for 256/512-byte
+ * __nand_calculate_ecc - [NAND Interface] Calculate 3-byte ECC for 256/512-byte
* block
- * @mtd: MTD block structure
* @buf: input buffer with raw data
+ * @eccsize: data bytes per ecc step (256 or 512)
* @code: output buffer with ECC
*/
-int nand_calculate_ecc(struct mtd_info *mtd, const unsigned char *buf,
+void __nand_calculate_ecc(const unsigned char *buf, unsigned int eccsize,
unsigned char *code)
{
int i;
const uint32_t *bp = (uint32_t *)buf;
/* 256 or 512 bytes/ecc */
- const uint32_t eccsize_mult =
- (((struct nand_chip *)mtd->priv)->ecc.size) >> 8;
+ const uint32_t eccsize_mult = eccsize >> 8;
uint32_t cur; /* current value in buffer */
/* rp0..rp15..rp17 are the various accumulated parities (per byte) */
uint32_t rp0, rp1, rp2, rp3, rp4, rp5, rp6, rp7;
(invparity[par & 0x55] << 2) |
(invparity[rp17] << 1) |
(invparity[rp16] << 0);
+}
+EXPORT_SYMBOL(__nand_calculate_ecc);
+
+/**
+ * nand_calculate_ecc - [NAND Interface] Calculate 3-byte ECC for 256/512-byte
+ * block
+ * @mtd: MTD block structure
+ * @buf: input buffer with raw data
+ * @code: output buffer with ECC
+ */
+int nand_calculate_ecc(struct mtd_info *mtd, const unsigned char *buf,
+ unsigned char *code)
+{
+ __nand_calculate_ecc(buf,
+ ((struct nand_chip *)mtd->priv)->ecc.size, code);
+
return 0;
}
EXPORT_SYMBOL(nand_calculate_ecc);
MODULE_PARM_DESC(cache_file, "File to use to cache nand pages instead of memory");
/* The largest possible page size */
-#define NS_LARGEST_PAGE_SIZE 2048
+#define NS_LARGEST_PAGE_SIZE 4096
/* The prefix for simulator output */
#define NS_OUTPUT_PREFIX "[nandsim]"
#define OPT_SMARTMEDIA 0x00000010 /* SmartMedia technology chips */
#define OPT_AUTOINCR 0x00000020 /* page number auto inctimentation is possible */
#define OPT_PAGE512_8BIT 0x00000040 /* 512-byte page chips with 8-bit bus width */
-#define OPT_LARGEPAGE (OPT_PAGE2048) /* 2048-byte page chips */
+#define OPT_PAGE4096 0x00000080 /* 4096-byte page chips */
+#define OPT_LARGEPAGE (OPT_PAGE2048 | OPT_PAGE4096) /* 2048 & 4096-byte page chips */
#define OPT_SMALLPAGE (OPT_PAGE256 | OPT_PAGE512) /* 256 and 512-byte page chips */
/* Remove action bits ftom state */
ns->options |= OPT_PAGE512_8BIT;
} else if (ns->geom.pgsz == 2048) {
ns->options |= OPT_PAGE2048;
+ } else if (ns->geom.pgsz == 4096) {
+ ns->options |= OPT_PAGE4096;
} else {
NS_ERR("init_nandsim: unknown page size %u\n", ns->geom.pgsz);
return -EIO;
{
struct platform_nand_data *pdata = pdev->dev.platform_data;
struct plat_nand_data *data;
- int res = 0;
+ struct resource *res;
+ int err = 0;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENXIO;
/* Allocate memory for the device structure (and zero it) */
data = kzalloc(sizeof(struct plat_nand_data), GFP_KERNEL);
return -ENOMEM;
}
- data->io_base = ioremap(pdev->resource[0].start,
- pdev->resource[0].end - pdev->resource[0].start + 1);
+ if (!request_mem_region(res->start, resource_size(res),
+ dev_name(&pdev->dev))) {
+ dev_err(&pdev->dev, "request_mem_region failed\n");
+ err = -EBUSY;
+ goto out_free;
+ }
+
+ data->io_base = ioremap(res->start, resource_size(res));
if (data->io_base == NULL) {
dev_err(&pdev->dev, "ioremap failed\n");
- kfree(data);
- return -EIO;
+ err = -EIO;
+ goto out_release_io;
}
data->chip.priv = &data;
/* Handle any platform specific setup */
if (pdata->ctrl.probe) {
- res = pdata->ctrl.probe(pdev);
- if (res)
+ err = pdata->ctrl.probe(pdev);
+ if (err)
goto out;
}
/* Scan to find existance of the device */
if (nand_scan(&data->mtd, 1)) {
- res = -ENXIO;
+ err = -ENXIO;
goto out;
}
#ifdef CONFIG_MTD_PARTITIONS
if (pdata->chip.part_probe_types) {
- res = parse_mtd_partitions(&data->mtd,
+ err = parse_mtd_partitions(&data->mtd,
pdata->chip.part_probe_types,
&data->parts, 0);
- if (res > 0) {
- add_mtd_partitions(&data->mtd, data->parts, res);
+ if (err > 0) {
+ add_mtd_partitions(&data->mtd, data->parts, err);
return 0;
}
}
pdata->chip.set_parts(data->mtd.size, &pdata->chip);
if (pdata->chip.partitions) {
data->parts = pdata->chip.partitions;
- res = add_mtd_partitions(&data->mtd, data->parts,
+ err = add_mtd_partitions(&data->mtd, data->parts,
pdata->chip.nr_partitions);
} else
#endif
- res = add_mtd_device(&data->mtd);
+ err = add_mtd_device(&data->mtd);
- if (!res)
- return res;
+ if (!err)
+ return err;
nand_release(&data->mtd);
out:
pdata->ctrl.remove(pdev);
platform_set_drvdata(pdev, NULL);
iounmap(data->io_base);
+out_release_io:
+ release_mem_region(res->start, resource_size(res));
+out_free:
kfree(data);
- return res;
+ return err;
}
/*
{
struct plat_nand_data *data = platform_get_drvdata(pdev);
struct platform_nand_data *pdata = pdev->dev.platform_data;
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
nand_release(&data->mtd);
#ifdef CONFIG_MTD_PARTITIONS
if (pdata->ctrl.remove)
pdata->ctrl.remove(pdev);
iounmap(data->io_base);
+ release_mem_region(res->start, resource_size(res));
kfree(data);
return 0;
chip->select_chip = s3c2410_nand_select_chip;
chip->chip_delay = 50;
chip->priv = nmtd;
- chip->options = 0;
+ chip->options = set->options;
chip->controller = &info->controller;
switch (info->cpu_type) {
chip = mtd->priv;
txx9_priv = chip->priv;
+ nand_release(mtd);
#ifdef CONFIG_MTD_PARTITIONS
- del_mtd_partitions(mtd);
kfree(drvdata->parts[i]);
#endif
- del_mtd_device(mtd);
kfree(txx9_priv->mtdname);
kfree(txx9_priv);
}
unsigned long timeout;
u32 syscfg;
- if (state == FL_RESETING) {
- int i;
+ if (state == FL_RESETING || state == FL_PREPARING_ERASE ||
+ state == FL_VERIFYING_ERASE) {
+ int i = 21;
+ unsigned int intr_flags = ONENAND_INT_MASTER;
+
+ switch (state) {
+ case FL_RESETING:
+ intr_flags |= ONENAND_INT_RESET;
+ break;
+ case FL_PREPARING_ERASE:
+ intr_flags |= ONENAND_INT_ERASE;
+ break;
+ case FL_VERIFYING_ERASE:
+ i = 101;
+ break;
+ }
- for (i = 0; i < 20; i++) {
+ while (--i) {
udelay(1);
intr = read_reg(c, ONENAND_REG_INTERRUPT);
if (intr & ONENAND_INT_MASTER)
wait_err("controller error", state, ctrl, intr);
return -EIO;
}
- if (!(intr & ONENAND_INT_RESET)) {
+ if ((intr & intr_flags) != intr_flags) {
wait_err("timeout", state, ctrl, intr);
return -EIO;
}
/*
* linux/drivers/mtd/onenand/onenand_base.c
*
- * Copyright (C) 2005-2007 Samsung Electronics
+ * Copyright © 2005-2009 Samsung Electronics
+ * Copyright © 2007 Nokia Corporation
+ *
* Kyungmin Park <kyungmin.park@samsung.com>
*
* Credits:
* Adrian Hunter <ext-adrian.hunter@nokia.com>:
* auto-placement support, read-while load support, various fixes
- * Copyright (C) Nokia Corporation, 2007
*
* Vishak G <vishak.g at samsung.com>, Rohit Hagargundgi <h.rohit at samsung.com>
* Flex-OneNAND support
- * Copyright (C) Samsung Electronics, 2008
+ * Amul Kumar Saha <amul.saha at samsung.com>
+ * OTP support
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
#include <asm/io.h>
+/*
+ * Multiblock erase if number of blocks to erase is 2 or more.
+ * Maximum number of blocks for simultaneous erase is 64.
+ */
+#define MB_ERASE_MIN_BLK_COUNT 2
+#define MB_ERASE_MAX_BLK_COUNT 64
+
/* Default Flex-OneNAND boundary and lock respectively */
static int flex_bdry[MAX_DIES * 2] = { -1, 0, -1, 0 };
" : 0->Set boundary in unlocked status"
" : 1->Set boundary in locked status");
+/* Default OneNAND/Flex-OneNAND OTP options*/
+static int otp;
+
+module_param(otp, int, 0400);
+MODULE_PARM_DESC(otp, "Corresponding behaviour of OneNAND in OTP"
+ "Syntax : otp=LOCK_TYPE"
+ "LOCK_TYPE : Keys issued, for specific OTP Lock type"
+ " : 0 -> Default (No Blocks Locked)"
+ " : 1 -> OTP Block lock"
+ " : 2 -> 1st Block lock"
+ " : 3 -> BOTH OTP Block and 1st Block lock");
+
/**
* onenand_oob_128 - oob info for Flex-Onenand with 4KB page
* For now, we expose only 64 out of 80 ecc bytes
break;
case ONENAND_CMD_ERASE:
+ case ONENAND_CMD_MULTIBLOCK_ERASE:
+ case ONENAND_CMD_ERASE_VERIFY:
case ONENAND_CMD_BUFFERRAM:
case ONENAND_CMD_OTP_ACCESS:
block = onenand_block(this, addr);
if (interrupt & flags)
break;
- if (state != FL_READING)
+ if (state != FL_READING && state != FL_PREPARING_ERASE)
cond_resched();
}
/* To get correct interrupt status in timeout case */
int ecc = onenand_read_ecc(this);
if (ecc) {
if (ecc & ONENAND_ECC_2BIT_ALL) {
- printk(KERN_ERR "onenand_wait: ECC error = 0x%04x\n", ecc);
+ printk(KERN_ERR "%s: ECC error = 0x%04x\n",
+ __func__, ecc);
mtd->ecc_stats.failed++;
return -EBADMSG;
} else if (ecc & ONENAND_ECC_1BIT_ALL) {
- printk(KERN_DEBUG "onenand_wait: correctable ECC error = 0x%04x\n", ecc);
+ printk(KERN_DEBUG "%s: correctable ECC error = 0x%04x\n",
+ __func__, ecc);
mtd->ecc_stats.corrected++;
}
}
} else if (state == FL_READING) {
- printk(KERN_ERR "onenand_wait: read timeout! ctrl=0x%04x intr=0x%04x\n", ctrl, interrupt);
+ printk(KERN_ERR "%s: read timeout! ctrl=0x%04x intr=0x%04x\n",
+ __func__, ctrl, interrupt);
+ return -EIO;
+ }
+
+ if (state == FL_PREPARING_ERASE && !(interrupt & ONENAND_INT_ERASE)) {
+ printk(KERN_ERR "%s: mb erase timeout! ctrl=0x%04x intr=0x%04x\n",
+ __func__, ctrl, interrupt);
+ return -EIO;
+ }
+
+ if (!(interrupt & ONENAND_INT_MASTER)) {
+ printk(KERN_ERR "%s: timeout! ctrl=0x%04x intr=0x%04x\n",
+ __func__, ctrl, interrupt);
return -EIO;
}
/* If there's controller error, it's a real error */
if (ctrl & ONENAND_CTRL_ERROR) {
- printk(KERN_ERR "onenand_wait: controller error = 0x%04x\n",
- ctrl);
+ printk(KERN_ERR "%s: controller error = 0x%04x\n",
+ __func__, ctrl);
if (ctrl & ONENAND_CTRL_LOCK)
- printk(KERN_ERR "onenand_wait: it's locked error.\n");
+ printk(KERN_ERR "%s: it's locked error.\n", __func__);
return -EIO;
}
/* We are attempting to reread, so decrement stats.failed
* which was incremented by onenand_wait due to read failure
*/
- printk(KERN_INFO "onenand_recover_lsb: Attempting to recover from uncorrectable read\n");
+ printk(KERN_INFO "%s: Attempting to recover from uncorrectable read\n",
+ __func__);
mtd->ecc_stats.failed--;
/* Issue the LSB page recovery command */
int ret = 0;
int writesize = this->writesize;
- DEBUG(MTD_DEBUG_LEVEL3, "onenand_mlc_read_ops_nolock: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
+ DEBUG(MTD_DEBUG_LEVEL3, "%s: from = 0x%08x, len = %i\n",
+ __func__, (unsigned int) from, (int) len);
if (ops->mode == MTD_OOB_AUTO)
oobsize = this->ecclayout->oobavail;
/* Do not allow reads past end of device */
if (from + len > mtd->size) {
- printk(KERN_ERR "onenand_mlc_read_ops_nolock: Attempt read beyond end of device\n");
+ printk(KERN_ERR "%s: Attempt read beyond end of device\n",
+ __func__);
ops->retlen = 0;
ops->oobretlen = 0;
return -EINVAL;
int ret = 0, boundary = 0;
int writesize = this->writesize;
- DEBUG(MTD_DEBUG_LEVEL3, "onenand_read_ops_nolock: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
+ DEBUG(MTD_DEBUG_LEVEL3, "%s: from = 0x%08x, len = %i\n",
+ __func__, (unsigned int) from, (int) len);
if (ops->mode == MTD_OOB_AUTO)
oobsize = this->ecclayout->oobavail;
/* Do not allow reads past end of device */
if ((from + len) > mtd->size) {
- printk(KERN_ERR "onenand_read_ops_nolock: Attempt read beyond end of device\n");
+ printk(KERN_ERR "%s: Attempt read beyond end of device\n",
+ __func__);
ops->retlen = 0;
ops->oobretlen = 0;
return -EINVAL;
from += ops->ooboffs;
- DEBUG(MTD_DEBUG_LEVEL3, "onenand_read_oob_nolock: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
+ DEBUG(MTD_DEBUG_LEVEL3, "%s: from = 0x%08x, len = %i\n",
+ __func__, (unsigned int) from, (int) len);
/* Initialize return length value */
ops->oobretlen = 0;
column = from & (mtd->oobsize - 1);
if (unlikely(column >= oobsize)) {
- printk(KERN_ERR "onenand_read_oob_nolock: Attempted to start read outside oob\n");
+ printk(KERN_ERR "%s: Attempted to start read outside oob\n",
+ __func__);
return -EINVAL;
}
if (unlikely(from >= mtd->size ||
column + len > ((mtd->size >> this->page_shift) -
(from >> this->page_shift)) * oobsize)) {
- printk(KERN_ERR "onenand_read_oob_nolock: Attempted to read beyond end of device\n");
+ printk(KERN_ERR "%s: Attempted to read beyond end of device\n",
+ __func__);
return -EINVAL;
}
ret = onenand_recover_lsb(mtd, from, ret);
if (ret && ret != -EBADMSG) {
- printk(KERN_ERR "onenand_read_oob_nolock: read failed = 0x%x\n", ret);
+ printk(KERN_ERR "%s: read failed = 0x%x\n",
+ __func__, ret);
break;
}
if (interrupt & ONENAND_INT_READ) {
int ecc = onenand_read_ecc(this);
if (ecc & ONENAND_ECC_2BIT_ALL) {
- printk(KERN_INFO "onenand_bbt_wait: ecc error = 0x%04x"
- ", controller error 0x%04x\n", ecc, ctrl);
+ printk(KERN_WARNING "%s: ecc error = 0x%04x, "
+ "controller error 0x%04x\n",
+ __func__, ecc, ctrl);
return ONENAND_BBT_READ_ECC_ERROR;
}
} else {
- printk(KERN_ERR "onenand_bbt_wait: read timeout!"
- "ctrl=0x%04x intr=0x%04x\n", ctrl, interrupt);
+ printk(KERN_ERR "%s: read timeout! ctrl=0x%04x intr=0x%04x\n",
+ __func__, ctrl, interrupt);
return ONENAND_BBT_READ_FATAL_ERROR;
}
/* Initial bad block case: 0x2400 or 0x0400 */
if (ctrl & ONENAND_CTRL_ERROR) {
- printk(KERN_DEBUG "onenand_bbt_wait: "
- "controller error = 0x%04x\n", ctrl);
+ printk(KERN_DEBUG "%s: controller error = 0x%04x\n",
+ __func__, ctrl);
return ONENAND_BBT_READ_ERROR;
}
size_t len = ops->ooblen;
u_char *buf = ops->oobbuf;
- DEBUG(MTD_DEBUG_LEVEL3, "onenand_bbt_read_oob: from = 0x%08x, len = %zi\n", (unsigned int) from, len);
+ DEBUG(MTD_DEBUG_LEVEL3, "%s: from = 0x%08x, len = %zi\n",
+ __func__, (unsigned int) from, len);
/* Initialize return value */
ops->oobretlen = 0;
/* Do not allow reads past end of device */
if (unlikely((from + len) > mtd->size)) {
- printk(KERN_ERR "onenand_bbt_read_oob: Attempt read beyond end of device\n");
+ printk(KERN_ERR "%s: Attempt read beyond end of device\n",
+ __func__);
return ONENAND_BBT_READ_FATAL_ERROR;
}
/* Wait for any existing operation to clear */
onenand_panic_wait(mtd);
- DEBUG(MTD_DEBUG_LEVEL3, "onenand_panic_write: to = 0x%08x, len = %i\n",
- (unsigned int) to, (int) len);
+ DEBUG(MTD_DEBUG_LEVEL3, "%s: to = 0x%08x, len = %i\n",
+ __func__, (unsigned int) to, (int) len);
/* Initialize retlen, in case of early exit */
*retlen = 0;
/* Do not allow writes past end of device */
if (unlikely((to + len) > mtd->size)) {
- printk(KERN_ERR "onenand_panic_write: Attempt write to past end of device\n");
+ printk(KERN_ERR "%s: Attempt write to past end of device\n",
+ __func__);
return -EINVAL;
}
/* Reject writes, which are not page aligned */
if (unlikely(NOTALIGNED(to) || NOTALIGNED(len))) {
- printk(KERN_ERR "onenand_panic_write: Attempt to write not page aligned data\n");
+ printk(KERN_ERR "%s: Attempt to write not page aligned data\n",
+ __func__);
return -EINVAL;
}
}
if (ret) {
- printk(KERN_ERR "onenand_panic_write: write failed %d\n", ret);
+ printk(KERN_ERR "%s: write failed %d\n", __func__, ret);
break;
}
u_char *oobbuf;
int ret = 0;
- DEBUG(MTD_DEBUG_LEVEL3, "onenand_write_ops_nolock: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
+ DEBUG(MTD_DEBUG_LEVEL3, "%s: to = 0x%08x, len = %i\n",
+ __func__, (unsigned int) to, (int) len);
/* Initialize retlen, in case of early exit */
ops->retlen = 0;
/* Do not allow writes past end of device */
if (unlikely((to + len) > mtd->size)) {
- printk(KERN_ERR "onenand_write_ops_nolock: Attempt write to past end of device\n");
+ printk(KERN_ERR "%s: Attempt write to past end of device\n",
+ __func__);
return -EINVAL;
}
/* Reject writes, which are not page aligned */
if (unlikely(NOTALIGNED(to) || NOTALIGNED(len))) {
- printk(KERN_ERR "onenand_write_ops_nolock: Attempt to write not page aligned data\n");
+ printk(KERN_ERR "%s: Attempt to write not page aligned data\n",
+ __func__);
return -EINVAL;
}
onenand_update_bufferram(mtd, prev, !ret && !prev_subpage);
if (ret) {
written -= prevlen;
- printk(KERN_ERR "onenand_write_ops_nolock: write failed %d\n", ret);
+ printk(KERN_ERR "%s: write failed %d\n",
+ __func__, ret);
break;
}
/* Only check verify write turn on */
ret = onenand_verify(mtd, buf - len, to - len, len);
if (ret)
- printk(KERN_ERR "onenand_write_ops_nolock: verify failed %d\n", ret);
+ printk(KERN_ERR "%s: verify failed %d\n",
+ __func__, ret);
break;
}
/* In partial page write we don't update bufferram */
onenand_update_bufferram(mtd, to, !ret && !subpage);
if (ret) {
- printk(KERN_ERR "onenand_write_ops_nolock: write failed %d\n", ret);
+ printk(KERN_ERR "%s: write failed %d\n",
+ __func__, ret);
break;
}
/* Only check verify write turn on */
ret = onenand_verify(mtd, buf, to, thislen);
if (ret) {
- printk(KERN_ERR "onenand_write_ops_nolock: verify failed %d\n", ret);
+ printk(KERN_ERR "%s: verify failed %d\n",
+ __func__, ret);
break;
}
to += ops->ooboffs;
- DEBUG(MTD_DEBUG_LEVEL3, "onenand_write_oob_nolock: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
+ DEBUG(MTD_DEBUG_LEVEL3, "%s: to = 0x%08x, len = %i\n",
+ __func__, (unsigned int) to, (int) len);
/* Initialize retlen, in case of early exit */
ops->oobretlen = 0;
column = to & (mtd->oobsize - 1);
if (unlikely(column >= oobsize)) {
- printk(KERN_ERR "onenand_write_oob_nolock: Attempted to start write outside oob\n");
+ printk(KERN_ERR "%s: Attempted to start write outside oob\n",
+ __func__);
return -EINVAL;
}
/* For compatibility with NAND: Do not allow write past end of page */
if (unlikely(column + len > oobsize)) {
- printk(KERN_ERR "onenand_write_oob_nolock: "
- "Attempt to write past end of page\n");
+ printk(KERN_ERR "%s: Attempt to write past end of page\n",
+ __func__);
return -EINVAL;
}
if (unlikely(to >= mtd->size ||
column + len > ((mtd->size >> this->page_shift) -
(to >> this->page_shift)) * oobsize)) {
- printk(KERN_ERR "onenand_write_oob_nolock: Attempted to write past end of device\n");
+ printk(KERN_ERR "%s: Attempted to write past end of device\n",
+ __func__);
return -EINVAL;
}
ret = this->wait(mtd, FL_WRITING);
if (ret) {
- printk(KERN_ERR "onenand_write_oob_nolock: write failed %d\n", ret);
+ printk(KERN_ERR "%s: write failed %d\n", __func__, ret);
break;
}
ret = onenand_verify_oob(mtd, oobbuf, to);
if (ret) {
- printk(KERN_ERR "onenand_write_oob_nolock: verify failed %d\n", ret);
+ printk(KERN_ERR "%s: verify failed %d\n",
+ __func__, ret);
break;
}
return bbm->isbad_bbt(mtd, ofs, allowbbt);
}
+
+static int onenand_multiblock_erase_verify(struct mtd_info *mtd,
+ struct erase_info *instr)
+{
+ struct onenand_chip *this = mtd->priv;
+ loff_t addr = instr->addr;
+ int len = instr->len;
+ unsigned int block_size = (1 << this->erase_shift);
+ int ret = 0;
+
+ while (len) {
+ this->command(mtd, ONENAND_CMD_ERASE_VERIFY, addr, block_size);
+ ret = this->wait(mtd, FL_VERIFYING_ERASE);
+ if (ret) {
+ printk(KERN_ERR "%s: Failed verify, block %d\n",
+ __func__, onenand_block(this, addr));
+ instr->state = MTD_ERASE_FAILED;
+ instr->fail_addr = addr;
+ return -1;
+ }
+ len -= block_size;
+ addr += block_size;
+ }
+ return 0;
+}
+
/**
- * onenand_erase - [MTD Interface] erase block(s)
+ * onenand_multiblock_erase - [Internal] erase block(s) using multiblock erase
* @param mtd MTD device structure
* @param instr erase instruction
+ * @param region erase region
*
- * Erase one ore more blocks
+ * Erase one or more blocks up to 64 block at a time
*/
-static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
+static int onenand_multiblock_erase(struct mtd_info *mtd,
+ struct erase_info *instr,
+ unsigned int block_size)
{
struct onenand_chip *this = mtd->priv;
- unsigned int block_size;
loff_t addr = instr->addr;
- loff_t len = instr->len;
- int ret = 0, i;
- struct mtd_erase_region_info *region = NULL;
- loff_t region_end = 0;
+ int len = instr->len;
+ int eb_count = 0;
+ int ret = 0;
+ int bdry_block = 0;
- DEBUG(MTD_DEBUG_LEVEL3, "onenand_erase: start = 0x%012llx, len = %llu\n", (unsigned long long) instr->addr, (unsigned long long) instr->len);
+ instr->state = MTD_ERASING;
- /* Do not allow erase past end of device */
- if (unlikely((len + addr) > mtd->size)) {
- printk(KERN_ERR "onenand_erase: Erase past end of device\n");
- return -EINVAL;
+ if (ONENAND_IS_DDP(this)) {
+ loff_t bdry_addr = this->chipsize >> 1;
+ if (addr < bdry_addr && (addr + len) > bdry_addr)
+ bdry_block = bdry_addr >> this->erase_shift;
}
- if (FLEXONENAND(this)) {
- /* Find the eraseregion of this address */
- i = flexonenand_region(mtd, addr);
- region = &mtd->eraseregions[i];
+ /* Pre-check bbs */
+ while (len) {
+ /* Check if we have a bad block, we do not erase bad blocks */
+ if (onenand_block_isbad_nolock(mtd, addr, 0)) {
+ printk(KERN_WARNING "%s: attempt to erase a bad block "
+ "at addr 0x%012llx\n",
+ __func__, (unsigned long long) addr);
+ instr->state = MTD_ERASE_FAILED;
+ return -EIO;
+ }
+ len -= block_size;
+ addr += block_size;
+ }
- block_size = region->erasesize;
- region_end = region->offset + region->erasesize * region->numblocks;
+ len = instr->len;
+ addr = instr->addr;
- /* Start address within region must align on block boundary.
- * Erase region's start offset is always block start address.
- */
- if (unlikely((addr - region->offset) & (block_size - 1))) {
- printk(KERN_ERR "onenand_erase: Unaligned address\n");
- return -EINVAL;
+ /* loop over 64 eb batches */
+ while (len) {
+ struct erase_info verify_instr = *instr;
+ int max_eb_count = MB_ERASE_MAX_BLK_COUNT;
+
+ verify_instr.addr = addr;
+ verify_instr.len = 0;
+
+ /* do not cross chip boundary */
+ if (bdry_block) {
+ int this_block = (addr >> this->erase_shift);
+
+ if (this_block < bdry_block) {
+ max_eb_count = min(max_eb_count,
+ (bdry_block - this_block));
+ }
}
- } else {
- block_size = 1 << this->erase_shift;
- /* Start address must align on block boundary */
- if (unlikely(addr & (block_size - 1))) {
- printk(KERN_ERR "onenand_erase: Unaligned address\n");
- return -EINVAL;
+ eb_count = 0;
+
+ while (len > block_size && eb_count < (max_eb_count - 1)) {
+ this->command(mtd, ONENAND_CMD_MULTIBLOCK_ERASE,
+ addr, block_size);
+ onenand_invalidate_bufferram(mtd, addr, block_size);
+
+ ret = this->wait(mtd, FL_PREPARING_ERASE);
+ if (ret) {
+ printk(KERN_ERR "%s: Failed multiblock erase, "
+ "block %d\n", __func__,
+ onenand_block(this, addr));
+ instr->state = MTD_ERASE_FAILED;
+ instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
+ return -EIO;
+ }
+
+ len -= block_size;
+ addr += block_size;
+ eb_count++;
+ }
+
+ /* last block of 64-eb series */
+ cond_resched();
+ this->command(mtd, ONENAND_CMD_ERASE, addr, block_size);
+ onenand_invalidate_bufferram(mtd, addr, block_size);
+
+ ret = this->wait(mtd, FL_ERASING);
+ /* Check if it is write protected */
+ if (ret) {
+ printk(KERN_ERR "%s: Failed erase, block %d\n",
+ __func__, onenand_block(this, addr));
+ instr->state = MTD_ERASE_FAILED;
+ instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
+ return -EIO;
+ }
+
+ len -= block_size;
+ addr += block_size;
+ eb_count++;
+
+ /* verify */
+ verify_instr.len = eb_count * block_size;
+ if (onenand_multiblock_erase_verify(mtd, &verify_instr)) {
+ instr->state = verify_instr.state;
+ instr->fail_addr = verify_instr.fail_addr;
+ return -EIO;
}
- }
- /* Length must align on block boundary */
- if (unlikely(len & (block_size - 1))) {
- printk(KERN_ERR "onenand_erase: Length not block aligned\n");
- return -EINVAL;
}
+ return 0;
+}
- instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
- /* Grab the lock and see if the device is available */
- onenand_get_device(mtd, FL_ERASING);
+/**
+ * onenand_block_by_block_erase - [Internal] erase block(s) using regular erase
+ * @param mtd MTD device structure
+ * @param instr erase instruction
+ * @param region erase region
+ * @param block_size erase block size
+ *
+ * Erase one or more blocks one block at a time
+ */
+static int onenand_block_by_block_erase(struct mtd_info *mtd,
+ struct erase_info *instr,
+ struct mtd_erase_region_info *region,
+ unsigned int block_size)
+{
+ struct onenand_chip *this = mtd->priv;
+ loff_t addr = instr->addr;
+ int len = instr->len;
+ loff_t region_end = 0;
+ int ret = 0;
+
+ if (region) {
+ /* region is set for Flex-OneNAND */
+ region_end = region->offset + region->erasesize * region->numblocks;
+ }
- /* Loop through the blocks */
instr->state = MTD_ERASING;
+ /* Loop through the blocks */
while (len) {
cond_resched();
/* Check if we have a bad block, we do not erase bad blocks */
if (onenand_block_isbad_nolock(mtd, addr, 0)) {
- printk (KERN_WARNING "onenand_erase: attempt to erase a bad block at addr 0x%012llx\n", (unsigned long long) addr);
+ printk(KERN_WARNING "%s: attempt to erase a bad block "
+ "at addr 0x%012llx\n",
+ __func__, (unsigned long long) addr);
instr->state = MTD_ERASE_FAILED;
- goto erase_exit;
+ return -EIO;
}
this->command(mtd, ONENAND_CMD_ERASE, addr, block_size);
ret = this->wait(mtd, FL_ERASING);
/* Check, if it is write protected */
if (ret) {
- printk(KERN_ERR "onenand_erase: Failed erase, block %d\n",
- onenand_block(this, addr));
+ printk(KERN_ERR "%s: Failed erase, block %d\n",
+ __func__, onenand_block(this, addr));
instr->state = MTD_ERASE_FAILED;
instr->fail_addr = addr;
- goto erase_exit;
+ return -EIO;
}
len -= block_size;
if (len & (block_size - 1)) {
/* FIXME: This should be handled at MTD partitioning level. */
- printk(KERN_ERR "onenand_erase: Unaligned address\n");
- goto erase_exit;
+ printk(KERN_ERR "%s: Unaligned address\n",
+ __func__);
+ return -EIO;
}
}
+ }
+ return 0;
+}
+
+/**
+ * onenand_erase - [MTD Interface] erase block(s)
+ * @param mtd MTD device structure
+ * @param instr erase instruction
+ *
+ * Erase one or more blocks
+ */
+static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+ struct onenand_chip *this = mtd->priv;
+ unsigned int block_size;
+ loff_t addr = instr->addr;
+ loff_t len = instr->len;
+ int ret = 0;
+ struct mtd_erase_region_info *region = NULL;
+ loff_t region_offset = 0;
+
+ DEBUG(MTD_DEBUG_LEVEL3, "%s: start=0x%012llx, len=%llu\n", __func__,
+ (unsigned long long) instr->addr, (unsigned long long) instr->len);
+
+ /* Do not allow erase past end of device */
+ if (unlikely((len + addr) > mtd->size)) {
+ printk(KERN_ERR "%s: Erase past end of device\n", __func__);
+ return -EINVAL;
+ }
+
+ if (FLEXONENAND(this)) {
+ /* Find the eraseregion of this address */
+ int i = flexonenand_region(mtd, addr);
+
+ region = &mtd->eraseregions[i];
+ block_size = region->erasesize;
+
+ /* Start address within region must align on block boundary.
+ * Erase region's start offset is always block start address.
+ */
+ region_offset = region->offset;
+ } else
+ block_size = 1 << this->erase_shift;
+
+ /* Start address must align on block boundary */
+ if (unlikely((addr - region_offset) & (block_size - 1))) {
+ printk(KERN_ERR "%s: Unaligned address\n", __func__);
+ return -EINVAL;
+ }
+ /* Length must align on block boundary */
+ if (unlikely(len & (block_size - 1))) {
+ printk(KERN_ERR "%s: Length not block aligned\n", __func__);
+ return -EINVAL;
}
- instr->state = MTD_ERASE_DONE;
+ instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
-erase_exit:
+ /* Grab the lock and see if the device is available */
+ onenand_get_device(mtd, FL_ERASING);
- ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO;
+ if (region || instr->len < MB_ERASE_MIN_BLK_COUNT * block_size) {
+ /* region is set for Flex-OneNAND (no mb erase) */
+ ret = onenand_block_by_block_erase(mtd, instr,
+ region, block_size);
+ } else {
+ ret = onenand_multiblock_erase(mtd, instr, block_size);
+ }
/* Deselect and wake up anyone waiting on the device */
onenand_release_device(mtd);
/* Do call back function */
- if (!ret)
+ if (!ret) {
+ instr->state = MTD_ERASE_DONE;
mtd_erase_callback(instr);
+ }
return ret;
}
*/
static void onenand_sync(struct mtd_info *mtd)
{
- DEBUG(MTD_DEBUG_LEVEL3, "onenand_sync: called\n");
+ DEBUG(MTD_DEBUG_LEVEL3, "%s: called\n", __func__);
/* Grab the lock and see if the device is available */
onenand_get_device(mtd, FL_SYNCING);
/* Check lock status */
status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
if (!(status & wp_status_mask))
- printk(KERN_ERR "wp status = 0x%x\n", status);
+ printk(KERN_ERR "%s: wp status = 0x%x\n",
+ __func__, status);
return 0;
}
/* Check lock status */
status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
if (!(status & wp_status_mask))
- printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status);
+ printk(KERN_ERR "%s: block = %d, wp status = 0x%x\n",
+ __func__, block, status);
}
return 0;
/* Check lock status */
status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
if (!(status & ONENAND_WP_US)) {
- printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status);
+ printk(KERN_ERR "%s: block = %d, wp status = 0x%x\n",
+ __func__, block, status);
return 0;
}
}
#ifdef CONFIG_MTD_ONENAND_OTP
+/**
+ * onenand_otp_command - Send OTP specific command to OneNAND device
+ * @param mtd MTD device structure
+ * @param cmd the command to be sent
+ * @param addr offset to read from or write to
+ * @param len number of bytes to read or write
+ */
+static int onenand_otp_command(struct mtd_info *mtd, int cmd, loff_t addr,
+ size_t len)
+{
+ struct onenand_chip *this = mtd->priv;
+ int value, block, page;
+
+ /* Address translation */
+ switch (cmd) {
+ case ONENAND_CMD_OTP_ACCESS:
+ block = (int) (addr >> this->erase_shift);
+ page = -1;
+ break;
+
+ default:
+ block = (int) (addr >> this->erase_shift);
+ page = (int) (addr >> this->page_shift);
+
+ if (ONENAND_IS_2PLANE(this)) {
+ /* Make the even block number */
+ block &= ~1;
+ /* Is it the odd plane? */
+ if (addr & this->writesize)
+ block++;
+ page >>= 1;
+ }
+ page &= this->page_mask;
+ break;
+ }
+
+ if (block != -1) {
+ /* Write 'DFS, FBA' of Flash */
+ value = onenand_block_address(this, block);
+ this->write_word(value, this->base +
+ ONENAND_REG_START_ADDRESS1);
+ }
+
+ if (page != -1) {
+ /* Now we use page size operation */
+ int sectors = 4, count = 4;
+ int dataram;
+
+ switch (cmd) {
+ default:
+ if (ONENAND_IS_2PLANE(this) && cmd == ONENAND_CMD_PROG)
+ cmd = ONENAND_CMD_2X_PROG;
+ dataram = ONENAND_CURRENT_BUFFERRAM(this);
+ break;
+ }
+
+ /* Write 'FPA, FSA' of Flash */
+ value = onenand_page_address(page, sectors);
+ this->write_word(value, this->base +
+ ONENAND_REG_START_ADDRESS8);
+
+ /* Write 'BSA, BSC' of DataRAM */
+ value = onenand_buffer_address(dataram, sectors, count);
+ this->write_word(value, this->base + ONENAND_REG_START_BUFFER);
+ }
+
+ /* Interrupt clear */
+ this->write_word(ONENAND_INT_CLEAR, this->base + ONENAND_REG_INTERRUPT);
+
+ /* Write command */
+ this->write_word(cmd, this->base + ONENAND_REG_COMMAND);
+
+ return 0;
+}
+
+/**
+ * onenand_otp_write_oob_nolock - [Internal] OneNAND write out-of-band, specific to OTP
+ * @param mtd MTD device structure
+ * @param to offset to write to
+ * @param len number of bytes to write
+ * @param retlen pointer to variable to store the number of written bytes
+ * @param buf the data to write
+ *
+ * OneNAND write out-of-band only for OTP
+ */
+static int onenand_otp_write_oob_nolock(struct mtd_info *mtd, loff_t to,
+ struct mtd_oob_ops *ops)
+{
+ struct onenand_chip *this = mtd->priv;
+ int column, ret = 0, oobsize;
+ int written = 0;
+ u_char *oobbuf;
+ size_t len = ops->ooblen;
+ const u_char *buf = ops->oobbuf;
+ int block, value, status;
+
+ to += ops->ooboffs;
+
+ /* Initialize retlen, in case of early exit */
+ ops->oobretlen = 0;
+
+ oobsize = mtd->oobsize;
+
+ column = to & (mtd->oobsize - 1);
+
+ oobbuf = this->oob_buf;
+
+ /* Loop until all data write */
+ while (written < len) {
+ int thislen = min_t(int, oobsize, len - written);
+
+ cond_resched();
+
+ block = (int) (to >> this->erase_shift);
+ /*
+ * Write 'DFS, FBA' of Flash
+ * Add: F100h DQ=DFS, FBA
+ */
+
+ value = onenand_block_address(this, block);
+ this->write_word(value, this->base +
+ ONENAND_REG_START_ADDRESS1);
+
+ /*
+ * Select DataRAM for DDP
+ * Add: F101h DQ=DBS
+ */
+
+ value = onenand_bufferram_address(this, block);
+ this->write_word(value, this->base +
+ ONENAND_REG_START_ADDRESS2);
+ ONENAND_SET_NEXT_BUFFERRAM(this);
+
+ /*
+ * Enter OTP access mode
+ */
+ this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0);
+ this->wait(mtd, FL_OTPING);
+
+ /* We send data to spare ram with oobsize
+ * to prevent byte access */
+ memcpy(oobbuf + column, buf, thislen);
+
+ /*
+ * Write Data into DataRAM
+ * Add: 8th Word
+ * in sector0/spare/page0
+ * DQ=XXFCh
+ */
+ this->write_bufferram(mtd, ONENAND_SPARERAM,
+ oobbuf, 0, mtd->oobsize);
+
+ onenand_otp_command(mtd, ONENAND_CMD_PROGOOB, to, mtd->oobsize);
+ onenand_update_bufferram(mtd, to, 0);
+ if (ONENAND_IS_2PLANE(this)) {
+ ONENAND_SET_BUFFERRAM1(this);
+ onenand_update_bufferram(mtd, to + this->writesize, 0);
+ }
+
+ ret = this->wait(mtd, FL_WRITING);
+ if (ret) {
+ printk(KERN_ERR "%s: write failed %d\n", __func__, ret);
+ break;
+ }
+
+ /* Exit OTP access mode */
+ this->command(mtd, ONENAND_CMD_RESET, 0, 0);
+ this->wait(mtd, FL_RESETING);
+
+ status = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
+ status &= 0x60;
+
+ if (status == 0x60) {
+ printk(KERN_DEBUG "\nBLOCK\tSTATUS\n");
+ printk(KERN_DEBUG "1st Block\tLOCKED\n");
+ printk(KERN_DEBUG "OTP Block\tLOCKED\n");
+ } else if (status == 0x20) {
+ printk(KERN_DEBUG "\nBLOCK\tSTATUS\n");
+ printk(KERN_DEBUG "1st Block\tLOCKED\n");
+ printk(KERN_DEBUG "OTP Block\tUN-LOCKED\n");
+ } else if (status == 0x40) {
+ printk(KERN_DEBUG "\nBLOCK\tSTATUS\n");
+ printk(KERN_DEBUG "1st Block\tUN-LOCKED\n");
+ printk(KERN_DEBUG "OTP Block\tLOCKED\n");
+ } else {
+ printk(KERN_DEBUG "Reboot to check\n");
+ }
+
+ written += thislen;
+ if (written == len)
+ break;
+
+ to += mtd->writesize;
+ buf += thislen;
+ column = 0;
+ }
+
+ ops->oobretlen = written;
+
+ return ret;
+}
+
/* Internal OTP operation */
typedef int (*otp_op_t)(struct mtd_info *mtd, loff_t form, size_t len,
size_t *retlen, u_char *buf);
struct mtd_oob_ops ops;
int ret;
- /* Enter OTP access mode */
- this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0);
- this->wait(mtd, FL_OTPING);
-
if (FLEXONENAND(this)) {
+
+ /* Enter OTP access mode */
+ this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0);
+ this->wait(mtd, FL_OTPING);
/*
* For Flex-OneNAND, we write lock mark to 1st word of sector 4 of
* main area of page 49.
ops.oobbuf = NULL;
ret = onenand_write_ops_nolock(mtd, mtd->writesize * 49, &ops);
*retlen = ops.retlen;
+
+ /* Exit OTP access mode */
+ this->command(mtd, ONENAND_CMD_RESET, 0, 0);
+ this->wait(mtd, FL_RESETING);
} else {
ops.mode = MTD_OOB_PLACE;
ops.ooblen = len;
ops.oobbuf = buf;
ops.ooboffs = 0;
- ret = onenand_write_oob_nolock(mtd, from, &ops);
+ ret = onenand_otp_write_oob_nolock(mtd, from, &ops);
*retlen = ops.oobretlen;
}
- /* Exit OTP access mode */
- this->command(mtd, ONENAND_CMD_RESET, 0, 0);
- this->wait(mtd, FL_RESETING);
-
return ret;
}
if (density < ONENAND_DEVICE_DENSITY_512Mb)
otp_pages = 20;
else
- otp_pages = 10;
+ otp_pages = 50;
if (mode == MTD_OTP_FACTORY) {
from += mtd->writesize * otp_pages;
- otp_pages = 64 - otp_pages;
+ otp_pages = ONENAND_PAGES_PER_BLOCK - otp_pages;
}
/* Check User/Factory boundary */
- if (((mtd->writesize * otp_pages) - (from + len)) < 0)
- return 0;
+ if (mode == MTD_OTP_USER) {
+ if (mtd->writesize * otp_pages < from + len)
+ return 0;
+ } else {
+ if (mtd->writesize * otp_pages < len)
+ return 0;
+ }
onenand_get_device(mtd, FL_OTPING);
while (len > 0 && otp_pages > 0) {
*retlen += sizeof(struct otp_info);
} else {
size_t tmp_retlen;
- int size = len;
ret = action(mtd, from, len, &tmp_retlen, buf);
- buf += size;
- len -= size;
- *retlen += size;
+ buf += tmp_retlen;
+ len -= tmp_retlen;
+ *retlen += tmp_retlen;
if (ret)
break;
u_char *buf = FLEXONENAND(this) ? this->page_buf : this->oob_buf;
size_t retlen;
int ret;
+ unsigned int otp_lock_offset = ONENAND_OTP_LOCK_OFFSET;
memset(buf, 0xff, FLEXONENAND(this) ? this->writesize
: mtd->oobsize);
- /*
- * Note: OTP lock operation
- * OTP block : 0xXXFC
- * 1st block : 0xXXF3 (If chip support)
- * Both : 0xXXF0 (If chip support)
- */
- if (FLEXONENAND(this))
- buf[FLEXONENAND_OTP_LOCK_OFFSET] = 0xFC;
- else
- buf[ONENAND_OTP_LOCK_OFFSET] = 0xFC;
-
/*
* Write lock mark to 8th word of sector0 of page0 of the spare0.
* We write 16 bytes spare area instead of 2 bytes.
from = 0;
len = FLEXONENAND(this) ? mtd->writesize : 16;
+ /*
+ * Note: OTP lock operation
+ * OTP block : 0xXXFC XX 1111 1100
+ * 1st block : 0xXXF3 (If chip support) XX 1111 0011
+ * Both : 0xXXF0 (If chip support) XX 1111 0000
+ */
+ if (FLEXONENAND(this))
+ otp_lock_offset = FLEXONENAND_OTP_LOCK_OFFSET;
+
+ /* ONENAND_OTP_AREA | ONENAND_OTP_BLOCK0 | ONENAND_OTP_AREA_BLOCK0 */
+ if (otp == 1)
+ buf[otp_lock_offset] = 0xFC;
+ else if (otp == 2)
+ buf[otp_lock_offset] = 0xF3;
+ else if (otp == 3)
+ buf[otp_lock_offset] = 0xF0;
+ else if (otp != 0)
+ printk(KERN_DEBUG "[OneNAND] Invalid option selected for OTP\n");
+
ret = onenand_otp_walk(mtd, from, len, &retlen, buf, do_otp_lock, MTD_OTP_USER);
return ret ? : retlen;
}
+
#endif /* CONFIG_MTD_ONENAND_OTP */
/**
break;
if (i != mtd->oobsize) {
- printk(KERN_WARNING "Block %d not erased.\n", block);
+ printk(KERN_WARNING "%s: Block %d not erased.\n",
+ __func__, block);
return 1;
}
}
blksperdie >>= ONENAND_IS_DDP(this) ? 1 : 0;
if (boundary >= blksperdie) {
- printk(KERN_ERR "flexonenand_set_boundary: Invalid boundary value. "
- "Boundary not changed.\n");
+ printk(KERN_ERR "%s: Invalid boundary value. "
+ "Boundary not changed.\n", __func__);
return -EINVAL;
}
new = boundary + (die * this->density_mask);
ret = flexonenand_check_blocks_erased(mtd, min(old, new) + 1, max(old, new));
if (ret) {
- printk(KERN_ERR "flexonenand_set_boundary: Please erase blocks before boundary change\n");
+ printk(KERN_ERR "%s: Please erase blocks "
+ "before boundary change\n", __func__);
return ret;
}
thisboundary = this->read_word(this->base + ONENAND_DATARAM);
if ((thisboundary >> FLEXONENAND_PI_UNLOCK_SHIFT) != 3) {
- printk(KERN_ERR "flexonenand_set_boundary: boundary locked\n");
+ printk(KERN_ERR "%s: boundary locked\n", __func__);
ret = 1;
goto out;
}
- printk(KERN_INFO "flexonenand_set_boundary: Changing die %d boundary: %d%s\n",
+ printk(KERN_INFO "Changing die %d boundary: %d%s\n",
die, boundary, lock ? "(Locked)" : "(Unlocked)");
addr = die ? this->diesize[0] : 0;
this->command(mtd, ONENAND_CMD_ERASE, addr, 0);
ret = this->wait(mtd, FL_ERASING);
if (ret) {
- printk(KERN_ERR "flexonenand_set_boundary: Failed PI erase for Die %d\n", die);
+ printk(KERN_ERR "%s: Failed PI erase for Die %d\n",
+ __func__, die);
goto out;
}
this->command(mtd, ONENAND_CMD_PROG, addr, 0);
ret = this->wait(mtd, FL_WRITING);
if (ret) {
- printk(KERN_ERR "flexonenand_set_boundary: Failed PI write for Die %d\n", die);
+ printk(KERN_ERR "%s: Failed PI write for Die %d\n",
+ __func__, die);
goto out;
}
if (this->state == FL_PM_SUSPENDED)
onenand_release_device(mtd);
else
- printk(KERN_ERR "resume() called for the chip which is not"
- "in suspended state\n");
+ printk(KERN_ERR "%s: resume() called for the chip which is not "
+ "in suspended state\n", __func__);
}
/**
if (!this->page_buf) {
this->page_buf = kzalloc(mtd->writesize, GFP_KERNEL);
if (!this->page_buf) {
- printk(KERN_ERR "onenand_scan(): Can't allocate page_buf\n");
+ printk(KERN_ERR "%s: Can't allocate page_buf\n",
+ __func__);
return -ENOMEM;
}
this->options |= ONENAND_PAGEBUF_ALLOC;
if (!this->oob_buf) {
this->oob_buf = kzalloc(mtd->oobsize, GFP_KERNEL);
if (!this->oob_buf) {
- printk(KERN_ERR "onenand_scan(): Can't allocate oob_buf\n");
+ printk(KERN_ERR "%s: Can't allocate oob_buf\n",
+ __func__);
if (this->options & ONENAND_PAGEBUF_ALLOC) {
this->options &= ~ONENAND_PAGEBUF_ALLOC;
kfree(this->page_buf);
break;
default:
- printk(KERN_WARNING "No OOB scheme defined for oobsize %d\n",
- mtd->oobsize);
+ printk(KERN_WARNING "%s: No OOB scheme defined for oobsize %d\n",
+ __func__, mtd->oobsize);
mtd->subpage_sft = 0;
/* To prevent kernel oops */
this->ecclayout = &onenand_oob_32;
obj-$(CONFIG_MTD_TESTS) += mtd_stresstest.o
obj-$(CONFIG_MTD_TESTS) += mtd_subpagetest.o
obj-$(CONFIG_MTD_TESTS) += mtd_torturetest.o
+obj-$(CONFIG_MTD_TESTS) += mtd_nandecctest.o
--- /dev/null
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/random.h>
+#include <linux/string.h>
+#include <linux/bitops.h>
+#include <linux/jiffies.h>
+#include <linux/mtd/nand_ecc.h>
+
+#if defined(CONFIG_MTD_NAND) || defined(CONFIG_MTD_NAND_MODULE)
+
+static void inject_single_bit_error(void *data, size_t size)
+{
+ unsigned long offset = random32() % (size * BITS_PER_BYTE);
+
+ __change_bit(offset, data);
+}
+
+static unsigned char data[512];
+static unsigned char error_data[512];
+
+static int nand_ecc_test(const size_t size)
+{
+ unsigned char code[3];
+ unsigned char error_code[3];
+ char testname[30];
+
+ BUG_ON(sizeof(data) < size);
+
+ sprintf(testname, "nand-ecc-%zu", size);
+
+ get_random_bytes(data, size);
+
+ memcpy(error_data, data, size);
+ inject_single_bit_error(error_data, size);
+
+ __nand_calculate_ecc(data, size, code);
+ __nand_calculate_ecc(error_data, size, error_code);
+ __nand_correct_data(error_data, code, error_code, size);
+
+ if (!memcmp(data, error_data, size)) {
+ printk(KERN_INFO "mtd_nandecctest: ok - %s\n", testname);
+ return 0;
+ }
+
+ printk(KERN_ERR "mtd_nandecctest: not ok - %s\n", testname);
+
+ printk(KERN_DEBUG "hexdump of data:\n");
+ print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
+ data, size, false);
+ printk(KERN_DEBUG "hexdump of error data:\n");
+ print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
+ error_data, size, false);
+
+ return -1;
+}
+
+#else
+
+static int nand_ecc_test(const size_t size)
+{
+ return 0;
+}
+
+#endif
+
+static int __init ecc_test_init(void)
+{
+ srandom32(jiffies);
+
+ nand_ecc_test(256);
+ nand_ecc_test(512);
+
+ return 0;
+}
+
+static void __exit ecc_test_exit(void)
+{
+}
+
+module_init(ecc_test_init);
+module_exit(ecc_test_exit);
+
+MODULE_DESCRIPTION("NAND ECC function test module");
+MODULE_AUTHOR("Akinobu Mita");
+MODULE_LICENSE("GPL");
printk(PRINT_PREF "error: cannot allocate memory\n");
return -ENOMEM;
}
- memset(bbt, 0 , ebcnt);
printk(PRINT_PREF "scanning for bad eraseblocks\n");
for (i = 0; i < ebcnt; ++i) {
mtd->writesize, ebcnt, pgcnt, mtd->oobsize);
err = -ENOMEM;
- mtd->erasesize = mtd->erasesize;
readbuf = kmalloc(mtd->erasesize, GFP_KERNEL);
if (!readbuf) {
printk(PRINT_PREF "error: cannot allocate memory\n");
use_len_max = mtd->ecclayout->oobavail;
vary_offset = 1;
simple_srand(5);
- printk(PRINT_PREF "writing OOBs of whole device\n");
- for (i = 0; i < ebcnt; ++i) {
- if (bbt[i])
- continue;
- err = write_eraseblock(i);
- if (err)
- goto out;
- if (i % 256 == 0)
- printk(PRINT_PREF "written up to eraseblock %u\n", i);
- cond_resched();
- }
- printk(PRINT_PREF "written %u eraseblocks\n", i);
+
+ err = write_whole_device();
+ if (err)
+ goto out;
/* Check all eraseblocks */
use_offset = 0;
do_div(tmp, mtd->erasesize);
ebcnt = tmp;
pgcnt = mtd->erasesize / mtd->writesize;
+ pgsize = mtd->writesize;
printk(PRINT_PREF "MTD device size %llu, eraseblock size %u, "
"page size %u, count of eraseblocks %u, pages per "
struct jffs2_raw_inode ri;
struct jffs2_node_frag *last_frag;
union jffs2_device_node dev;
- char *mdata = NULL, mdatalen = 0;
+ char *mdata = NULL;
+ int mdatalen = 0;
uint32_t alloclen, ilen;
int ret;
f->target = NULL;
mutex_unlock(&f->sem);
jffs2_do_clear_inode(c, f);
- return -ret;
+ return ret;
}
f->target[je32_to_cpu(latest_node->csize)] = '\0';
int jffs2_sum_init(struct jffs2_sb_info *c)
{
- uint32_t sum_size = max_t(uint32_t, c->sector_size, MAX_SUMMARY_SIZE);
+ uint32_t sum_size = min_t(uint32_t, c->sector_size, MAX_SUMMARY_SIZE);
c->summary = kzalloc(sizeof(struct jffs2_summary), GFP_KERNEL);
--- /dev/null
+/*
+ * linux/include/kmsg_dump.h
+ *
+ * Copyright (C) 2009 Net Insight AB
+ *
+ * Author: Simon Kagstrom <simon.kagstrom@netinsight.net>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+#ifndef _LINUX_KMSG_DUMP_H
+#define _LINUX_KMSG_DUMP_H
+
+#include <linux/list.h>
+
+enum kmsg_dump_reason {
+ KMSG_DUMP_OOPS,
+ KMSG_DUMP_PANIC,
+};
+
+/**
+ * struct kmsg_dumper - kernel crash message dumper structure
+ * @dump: The callback which gets called on crashes. The buffer is passed
+ * as two sections, where s1 (length l1) contains the older
+ * messages and s2 (length l2) contains the newer.
+ * @list: Entry in the dumper list (private)
+ * @registered: Flag that specifies if this is already registered
+ */
+struct kmsg_dumper {
+ void (*dump)(struct kmsg_dumper *dumper, enum kmsg_dump_reason reason,
+ const char *s1, unsigned long l1,
+ const char *s2, unsigned long l2);
+ struct list_head list;
+ int registered;
+};
+
+#ifdef CONFIG_PRINTK
+void kmsg_dump(enum kmsg_dump_reason reason);
+
+int kmsg_dump_register(struct kmsg_dumper *dumper);
+
+int kmsg_dump_unregister(struct kmsg_dumper *dumper);
+#else
+static inline void kmsg_dump(enum kmsg_dump_reason reason)
+{
+}
+
+static inline int kmsg_dump_register(struct kmsg_dumper *dumper)
+{
+ return -EINVAL;
+}
+
+static inline int kmsg_dump_unregister(struct kmsg_dumper *dumper)
+{
+ return -EINVAL;
+}
+#endif
+
+#endif /* _LINUX_KMSG_DUMP_H */
/**
* struct nand_bbt_descr - bad block table descriptor
- * @options: options for this descriptor
- * @pages: the page(s) where we find the bbt, used with
- * option BBT_ABSPAGE when bbt is searched,
- * then we store the found bbts pages here.
- * Its an array and supports up to 8 chips now
- * @offs: offset of the pattern in the oob area of the page
- * @veroffs: offset of the bbt version counter in the oob area of the page
- * @version: version read from the bbt page during scan
- * @len: length of the pattern, if 0 no pattern check is performed
- * @maxblocks: maximum number of blocks to search for a bbt. This
- * number of blocks is reserved at the end of the device
- * where the tables are written.
- * @reserved_block_code: if non-0, this pattern denotes a reserved
- * (rather than bad) block in the stored bbt
- * @pattern: pattern to identify bad block table or factory marked
- * good / bad blocks, can be NULL, if len = 0
+ * @options: options for this descriptor
+ * @pages: the page(s) where we find the bbt, used with option BBT_ABSPAGE
+ * when bbt is searched, then we store the found bbts pages here.
+ * Its an array and supports up to 8 chips now
+ * @offs: offset of the pattern in the oob area of the page
+ * @veroffs: offset of the bbt version counter in the oob are of the page
+ * @version: version read from the bbt page during scan
+ * @len: length of the pattern, if 0 no pattern check is performed
+ * @maxblocks: maximum number of blocks to search for a bbt. This number of
+ * blocks is reserved at the end of the device where the tables are
+ * written.
+ * @reserved_block_code: if non-0, this pattern denotes a reserved (rather than
+ * bad) block in the stored bbt
+ * @pattern: pattern to identify bad block table or factory marked good /
+ * bad blocks, can be NULL, if len = 0
*
* Descriptor for the bad block table marker and the descriptor for the
* pattern which identifies good and bad blocks. The assumption is made
/*
* Constants for oob configuration
*/
-#define ONENAND_BADBLOCK_POS 0
+#define NAND_SMALL_BADBLOCK_POS 5
+#define NAND_LARGE_BADBLOCK_POS 0
+#define ONENAND_BADBLOCK_POS 0
/*
* Bad block scanning errors
#define CFI_MFR_ANY 0xffff
#define CFI_ID_ANY 0xffff
-#define CFI_MFR_AMD 0x0001
-#define CFI_MFR_ATMEL 0x001F
-#define CFI_MFR_SAMSUNG 0x00EC
-#define CFI_MFR_ST 0x0020 /* STMicroelectronics */
+#define CFI_MFR_AMD 0x0001
+#define CFI_MFR_INTEL 0x0089
+#define CFI_MFR_ATMEL 0x001F
+#define CFI_MFR_SAMSUNG 0x00EC
+#define CFI_MFR_ST 0x0020 /* STMicroelectronics */
void cfi_fixup(struct mtd_info *mtd, struct cfi_fixup* fixups);
FL_XIP_WHILE_ERASING,
FL_XIP_WHILE_WRITING,
FL_SHUTDOWN,
+ /* These 2 come from nand_state_t, which has been unified here */
+ FL_READING,
+ FL_CACHEDPRG,
+ /* These 4 come from onenand_state_t, which has been unified here */
+ FL_RESETING,
+ FL_OTPING,
+ FL_PREPARING_ERASE,
+ FL_VERIFYING_ERASE,
+
FL_UNKNOWN
} flstate_t;
#include <linux/wait.h>
#include <linux/spinlock.h>
#include <linux/mtd/mtd.h>
+#include <linux/mtd/flashchip.h>
+#include <linux/mtd/bbm.h>
struct mtd_info;
/* Scan and identify a NAND device */
/* Chip does not allow subpage writes */
#define NAND_NO_SUBPAGE_WRITE 0x00000200
-
/* Options valid for Samsung large page devices */
#define NAND_SAMSUNG_LP_OPTIONS \
(NAND_NO_PADDING | NAND_CACHEPRG | NAND_COPYBACK)
/* This option is defined if the board driver allocates its own buffers
(e.g. because it needs them DMA-coherent */
#define NAND_OWN_BUFFERS 0x00040000
+/* Chip may not exist, so silence any errors in scan */
+#define NAND_SCAN_SILENT_NODEV 0x00080000
+
/* Options set by nand scan */
/* Nand scan has allocated controller struct */
#define NAND_CONTROLLER_ALLOC 0x80000000
#define NAND_CI_CHIPNR_MSK 0x03
#define NAND_CI_CELLTYPE_MSK 0x0C
-/*
- * nand_state_t - chip states
- * Enumeration for NAND flash chip state
- */
-typedef enum {
- FL_READY,
- FL_READING,
- FL_WRITING,
- FL_ERASING,
- FL_SYNCING,
- FL_CACHEDPRG,
- FL_PM_SUSPENDED,
-} nand_state_t;
-
/* Keep gcc happy */
struct nand_chip;
uint8_t cellinfo;
int badblockpos;
- nand_state_t state;
+ flstate_t state;
uint8_t *oob_poi;
struct nand_hw_control *controller;
extern struct nand_flash_dev nand_flash_ids[];
extern struct nand_manufacturers nand_manuf_ids[];
-/**
- * struct nand_bbt_descr - bad block table descriptor
- * @options: options for this descriptor
- * @pages: the page(s) where we find the bbt, used with option BBT_ABSPAGE
- * when bbt is searched, then we store the found bbts pages here.
- * Its an array and supports up to 8 chips now
- * @offs: offset of the pattern in the oob area of the page
- * @veroffs: offset of the bbt version counter in the oob are of the page
- * @version: version read from the bbt page during scan
- * @len: length of the pattern, if 0 no pattern check is performed
- * @maxblocks: maximum number of blocks to search for a bbt. This number of
- * blocks is reserved at the end of the device where the tables are
- * written.
- * @reserved_block_code: if non-0, this pattern denotes a reserved (rather than
- * bad) block in the stored bbt
- * @pattern: pattern to identify bad block table or factory marked good /
- * bad blocks, can be NULL, if len = 0
- *
- * Descriptor for the bad block table marker and the descriptor for the
- * pattern which identifies good and bad blocks. The assumption is made
- * that the pattern and the version count are always located in the oob area
- * of the first block.
- */
-struct nand_bbt_descr {
- int options;
- int pages[NAND_MAX_CHIPS];
- int offs;
- int veroffs;
- uint8_t version[NAND_MAX_CHIPS];
- int len;
- int maxblocks;
- int reserved_block_code;
- uint8_t *pattern;
-};
-
-/* Options for the bad block table descriptors */
-
-/* The number of bits used per block in the bbt on the device */
-#define NAND_BBT_NRBITS_MSK 0x0000000F
-#define NAND_BBT_1BIT 0x00000001
-#define NAND_BBT_2BIT 0x00000002
-#define NAND_BBT_4BIT 0x00000004
-#define NAND_BBT_8BIT 0x00000008
-/* The bad block table is in the last good block of the device */
-#define NAND_BBT_LASTBLOCK 0x00000010
-/* The bbt is at the given page, else we must scan for the bbt */
-#define NAND_BBT_ABSPAGE 0x00000020
-/* The bbt is at the given page, else we must scan for the bbt */
-#define NAND_BBT_SEARCH 0x00000040
-/* bbt is stored per chip on multichip devices */
-#define NAND_BBT_PERCHIP 0x00000080
-/* bbt has a version counter at offset veroffs */
-#define NAND_BBT_VERSION 0x00000100
-/* Create a bbt if none axists */
-#define NAND_BBT_CREATE 0x00000200
-/* Search good / bad pattern through all pages of a block */
-#define NAND_BBT_SCANALLPAGES 0x00000400
-/* Scan block empty during good / bad block scan */
-#define NAND_BBT_SCANEMPTY 0x00000800
-/* Write bbt if neccecary */
-#define NAND_BBT_WRITE 0x00001000
-/* Read and write back block contents when writing bbt */
-#define NAND_BBT_SAVECONTENT 0x00002000
-/* Search good / bad pattern on the first and the second page */
-#define NAND_BBT_SCAN2NDPAGE 0x00004000
-
-/* The maximum number of blocks to scan for a bbt */
-#define NAND_BBT_SCAN_MAXBLOCKS 4
-
extern int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd);
extern int nand_update_bbt(struct mtd_info *mtd, loff_t offs);
extern int nand_default_bbt(struct mtd_info *mtd);
extern int nand_do_read(struct mtd_info *mtd, loff_t from, size_t len,
size_t * retlen, uint8_t * buf);
-/*
-* Constants for oob configuration
-*/
-#define NAND_SMALL_BADBLOCK_POS 5
-#define NAND_LARGE_BADBLOCK_POS 0
-
/**
* struct platform_nand_chip - chip level device structure
* @nr_chips: max. number of chips to scan for
struct mtd_info;
/*
- * Calculate 3 byte ECC code for 256 byte block
+ * Calculate 3 byte ECC code for eccsize byte block
+ */
+void __nand_calculate_ecc(const u_char *dat, unsigned int eccsize,
+ u_char *ecc_code);
+
+/*
+ * Calculate 3 byte ECC code for 256/512 byte block
*/
int nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code);
unsigned int eccsize);
/*
- * Detect and correct a 1 bit error for 256 byte block
+ * Detect and correct a 1 bit error for 256/512 byte block
*/
int nand_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc);
/*
* linux/include/linux/mtd/onenand.h
*
- * Copyright (C) 2005-2007 Samsung Electronics
+ * Copyright © 2005-2009 Samsung Electronics
* Kyungmin Park <kyungmin.park@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
#include <linux/spinlock.h>
#include <linux/completion.h>
+#include <linux/mtd/flashchip.h>
#include <linux/mtd/onenand_regs.h>
#include <linux/mtd/bbm.h>
/* Free resources held by the OneNAND device */
extern void onenand_release(struct mtd_info *mtd);
-/*
- * onenand_state_t - chip states
- * Enumeration for OneNAND flash chip state
- */
-typedef enum {
- FL_READY,
- FL_READING,
- FL_WRITING,
- FL_ERASING,
- FL_SYNCING,
- FL_LOCKING,
- FL_RESETING,
- FL_OTPING,
- FL_PM_SUSPENDED,
-} onenand_state_t;
-
/**
* struct onenand_bufferram - OneNAND BufferRAM Data
* @blockpage: block & page address in BufferRAM
spinlock_t chip_lock;
wait_queue_head_t wq;
- onenand_state_t state;
+ flstate_t state;
unsigned char *page_buf;
unsigned char *oob_buf;
/*
* Helper macros
*/
+#define ONENAND_PAGES_PER_BLOCK (1<<6)
+
#define ONENAND_CURRENT_BUFFERRAM(this) (this->bufferram_index)
#define ONENAND_NEXT_BUFFERRAM(this) (this->bufferram_index ^ 1)
#define ONENAND_SET_NEXT_BUFFERRAM(this) (this->bufferram_index ^= 1)
#define ONENAND_CMD_LOCK_TIGHT (0x2C)
#define ONENAND_CMD_UNLOCK_ALL (0x27)
#define ONENAND_CMD_ERASE (0x94)
+#define ONENAND_CMD_MULTIBLOCK_ERASE (0x95)
+#define ONENAND_CMD_ERASE_VERIFY (0x71)
#define ONENAND_CMD_RESET (0xF0)
#define ONENAND_CMD_OTP_ACCESS (0x65)
#define ONENAND_CMD_READID (0x90)
*/
#include <linux/debug_locks.h>
#include <linux/interrupt.h>
+#include <linux/kmsg_dump.h>
#include <linux/kallsyms.h>
#include <linux/notifier.h>
#include <linux/module.h>
dump_stack();
#endif
+ kmsg_dump(KMSG_DUMP_PANIC);
/*
* If we have crashed and we have a crash kernel loaded let it handle
* everything else.
{
do_oops_enter_exit();
print_oops_end_marker();
+ kmsg_dump(KMSG_DUMP_OOPS);
}
#ifdef WANT_WARN_ON_SLOWPATH
#include <linux/syscalls.h>
#include <linux/kexec.h>
#include <linux/ratelimit.h>
+#include <linux/kmsg_dump.h>
#include <asm/uaccess.h>
return false;
}
EXPORT_SYMBOL(printk_timed_ratelimit);
+
+static DEFINE_SPINLOCK(dump_list_lock);
+static LIST_HEAD(dump_list);
+
+/**
+ * kmsg_dump_register - register a kernel log dumper.
+ * @dump: pointer to the kmsg_dumper structure
+ *
+ * Adds a kernel log dumper to the system. The dump callback in the
+ * structure will be called when the kernel oopses or panics and must be
+ * set. Returns zero on success and %-EINVAL or %-EBUSY otherwise.
+ */
+int kmsg_dump_register(struct kmsg_dumper *dumper)
+{
+ unsigned long flags;
+ int err = -EBUSY;
+
+ /* The dump callback needs to be set */
+ if (!dumper->dump)
+ return -EINVAL;
+
+ spin_lock_irqsave(&dump_list_lock, flags);
+ /* Don't allow registering multiple times */
+ if (!dumper->registered) {
+ dumper->registered = 1;
+ list_add_tail(&dumper->list, &dump_list);
+ err = 0;
+ }
+ spin_unlock_irqrestore(&dump_list_lock, flags);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(kmsg_dump_register);
+
+/**
+ * kmsg_dump_unregister - unregister a kmsg dumper.
+ * @dump: pointer to the kmsg_dumper structure
+ *
+ * Removes a dump device from the system. Returns zero on success and
+ * %-EINVAL otherwise.
+ */
+int kmsg_dump_unregister(struct kmsg_dumper *dumper)
+{
+ unsigned long flags;
+ int err = -EINVAL;
+
+ spin_lock_irqsave(&dump_list_lock, flags);
+ if (dumper->registered) {
+ dumper->registered = 0;
+ list_del(&dumper->list);
+ err = 0;
+ }
+ spin_unlock_irqrestore(&dump_list_lock, flags);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(kmsg_dump_unregister);
+
+static const char const *kmsg_reasons[] = {
+ [KMSG_DUMP_OOPS] = "oops",
+ [KMSG_DUMP_PANIC] = "panic",
+};
+
+static const char *kmsg_to_str(enum kmsg_dump_reason reason)
+{
+ if (reason >= ARRAY_SIZE(kmsg_reasons) || reason < 0)
+ return "unknown";
+
+ return kmsg_reasons[reason];
+}
+
+/**
+ * kmsg_dump - dump kernel log to kernel message dumpers.
+ * @reason: the reason (oops, panic etc) for dumping
+ *
+ * Iterate through each of the dump devices and call the oops/panic
+ * callbacks with the log buffer.
+ */
+void kmsg_dump(enum kmsg_dump_reason reason)
+{
+ unsigned long end;
+ unsigned chars;
+ struct kmsg_dumper *dumper;
+ const char *s1, *s2;
+ unsigned long l1, l2;
+ unsigned long flags;
+
+ /* Theoretically, the log could move on after we do this, but
+ there's not a lot we can do about that. The new messages
+ will overwrite the start of what we dump. */
+ spin_lock_irqsave(&logbuf_lock, flags);
+ end = log_end & LOG_BUF_MASK;
+ chars = logged_chars;
+ spin_unlock_irqrestore(&logbuf_lock, flags);
+
+ if (logged_chars > end) {
+ s1 = log_buf + log_buf_len - logged_chars + end;
+ l1 = logged_chars - end;
+
+ s2 = log_buf;
+ l2 = end;
+ } else {
+ s1 = "";
+ l1 = 0;
+
+ s2 = log_buf + end - logged_chars;
+ l2 = logged_chars;
+ }
+
+ if (!spin_trylock_irqsave(&dump_list_lock, flags)) {
+ printk(KERN_ERR "dump_kmsg: dump list lock is held during %s, skipping dump\n",
+ kmsg_to_str(reason));
+ return;
+ }
+ list_for_each_entry(dumper, &dump_list, list)
+ dumper->dump(dumper, reason, s1, l1, s2, l2);
+ spin_unlock_irqrestore(&dump_list_lock, flags);
+}
#endif
projects / cascardo / linux.git / commitdiff