2 * linux/drivers/mmc/host/tmio_mmc.h
4 * Copyright (C) 2016 Sang Engineering, Wolfram Sang
5 * Copyright (C) 2015-16 Renesas Electronics Corporation
6 * Copyright (C) 2007 Ian Molton
7 * Copyright (C) 2004 Ian Molton
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 * Driver for the MMC / SD / SDIO cell found in:
15 * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
21 #include <linux/dmaengine.h>
22 #include <linux/highmem.h>
23 #include <linux/mutex.h>
24 #include <linux/pagemap.h>
25 #include <linux/scatterlist.h>
26 #include <linux/spinlock.h>
28 #define CTL_SD_CMD 0x00
29 #define CTL_ARG_REG 0x04
30 #define CTL_STOP_INTERNAL_ACTION 0x08
31 #define CTL_XFER_BLK_COUNT 0xa
32 #define CTL_RESPONSE 0x0c
33 #define CTL_STATUS 0x1c
34 #define CTL_STATUS2 0x1e
35 #define CTL_IRQ_MASK 0x20
36 #define CTL_SD_CARD_CLK_CTL 0x24
37 #define CTL_SD_XFER_LEN 0x26
38 #define CTL_SD_MEM_CARD_OPT 0x28
39 #define CTL_SD_ERROR_DETAIL_STATUS 0x2c
40 #define CTL_SD_DATA_PORT 0x30
41 #define CTL_TRANSACTION_CTL 0x34
42 #define CTL_SDIO_STATUS 0x36
43 #define CTL_SDIO_IRQ_MASK 0x38
44 #define CTL_DMA_ENABLE 0xd8
45 #define CTL_RESET_SD 0xe0
46 #define CTL_VERSION 0xe2
47 #define CTL_SDIO_REGS 0x100
48 #define CTL_CLK_AND_WAIT_CTL 0x138
49 #define CTL_RESET_SDIO 0x1e0
51 /* Definitions for values the CTRL_STATUS register can take. */
52 #define TMIO_STAT_CMDRESPEND 0x00000001
53 #define TMIO_STAT_DATAEND 0x00000004
54 #define TMIO_STAT_CARD_REMOVE 0x00000008
55 #define TMIO_STAT_CARD_INSERT 0x00000010
56 #define TMIO_STAT_SIGSTATE 0x00000020
57 #define TMIO_STAT_WRPROTECT 0x00000080
58 #define TMIO_STAT_CARD_REMOVE_A 0x00000100
59 #define TMIO_STAT_CARD_INSERT_A 0x00000200
60 #define TMIO_STAT_SIGSTATE_A 0x00000400
61 #define TMIO_STAT_CMD_IDX_ERR 0x00010000
62 #define TMIO_STAT_CRCFAIL 0x00020000
63 #define TMIO_STAT_STOPBIT_ERR 0x00040000
64 #define TMIO_STAT_DATATIMEOUT 0x00080000
65 #define TMIO_STAT_RXOVERFLOW 0x00100000
66 #define TMIO_STAT_TXUNDERRUN 0x00200000
67 #define TMIO_STAT_CMDTIMEOUT 0x00400000
68 #define TMIO_STAT_RXRDY 0x01000000
69 #define TMIO_STAT_TXRQ 0x02000000
70 #define TMIO_STAT_ILL_FUNC 0x20000000
71 #define TMIO_STAT_CMD_BUSY 0x40000000
72 #define TMIO_STAT_ILL_ACCESS 0x80000000
74 #define TMIO_STATUS2_DAT0 BIT(7)
76 #define CLK_CTL_DIV_MASK 0xff
77 #define CLK_CTL_SCLKEN BIT(8)
79 #define TMIO_BBS 512 /* Boot block size */
81 /* Definitions for values the CTRL_SDIO_STATUS register can take. */
82 #define TMIO_SDIO_STAT_IOIRQ 0x0001
83 #define TMIO_SDIO_STAT_EXPUB52 0x4000
84 #define TMIO_SDIO_STAT_EXWT 0x8000
85 #define TMIO_SDIO_MASK_ALL 0xc007
87 /* Define some IRQ masks */
88 /* This is the mask used at reset by the chip */
89 #define TMIO_MASK_ALL 0x837f031d
90 #define TMIO_MASK_READOP (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND)
91 #define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND)
92 #define TMIO_MASK_CMD (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
93 TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
94 #define TMIO_MASK_IRQ (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
100 enum dma_slave_buswidth dma_buswidth;
101 bool (*filter)(struct dma_chan *chan, void *arg);
102 void (*enable)(struct tmio_mmc_host *host, bool enable);
105 struct tmio_mmc_host {
107 struct mmc_command *cmd;
108 struct mmc_request *mrq;
109 struct mmc_data *data;
110 struct mmc_host *mmc;
112 /* Callbacks for clock / power control */
113 void (*set_pwr)(struct platform_device *host, int state);
114 void (*set_clk_div)(struct platform_device *host, int state);
116 /* pio related stuff */
117 struct scatterlist *sg_ptr;
118 struct scatterlist *sg_orig;
121 unsigned long bus_shift;
123 struct platform_device *pdev;
124 struct tmio_mmc_data *pdata;
125 struct tmio_mmc_dma *dma;
129 struct dma_chan *chan_rx;
130 struct dma_chan *chan_tx;
131 struct tasklet_struct dma_complete;
132 struct tasklet_struct dma_issue;
133 struct scatterlist bounce_sg;
136 /* Track lost interrupts */
137 struct delayed_work delayed_reset_work;
138 struct work_struct done;
143 unsigned int clk_cache;
145 spinlock_t lock; /* protect host private data */
146 unsigned long last_req_ts;
147 struct mutex ios_lock; /* protect set_ios() context */
149 bool sdio_irq_enabled;
151 int (*write16_hook)(struct tmio_mmc_host *host, int addr);
152 int (*clk_enable)(struct tmio_mmc_host *host);
153 unsigned int (*clk_update)(struct tmio_mmc_host *host,
154 unsigned int new_clock);
155 void (*clk_disable)(struct tmio_mmc_host *host);
156 int (*multi_io_quirk)(struct mmc_card *card,
157 unsigned int direction, int blk_size);
158 int (*start_signal_voltage_switch)(struct mmc_host *mmc,
159 struct mmc_ios *ios);
162 struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev);
163 void tmio_mmc_host_free(struct tmio_mmc_host *host);
164 int tmio_mmc_host_probe(struct tmio_mmc_host *host,
165 struct tmio_mmc_data *pdata);
166 void tmio_mmc_host_remove(struct tmio_mmc_host *host);
167 void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
169 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
170 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
171 irqreturn_t tmio_mmc_irq(int irq, void *devid);
173 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
174 unsigned long *flags)
176 local_irq_save(*flags);
177 return kmap_atomic(sg_page(sg)) + sg->offset;
180 static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
181 unsigned long *flags, void *virt)
183 kunmap_atomic(virt - sg->offset);
184 local_irq_restore(*flags);
187 #if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
188 void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
189 void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable);
190 void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
191 void tmio_mmc_release_dma(struct tmio_mmc_host *host);
192 void tmio_mmc_abort_dma(struct tmio_mmc_host *host);
194 static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
195 struct mmc_data *data)
199 static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
203 static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
204 struct tmio_mmc_data *pdata)
206 host->chan_tx = NULL;
207 host->chan_rx = NULL;
210 static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
214 static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
220 int tmio_mmc_host_runtime_suspend(struct device *dev);
221 int tmio_mmc_host_runtime_resume(struct device *dev);
224 static inline u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
226 return readw(host->ctl + (addr << host->bus_shift));
229 static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
232 readsw(host->ctl + (addr << host->bus_shift), buf, count);
235 static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr)
237 return readw(host->ctl + (addr << host->bus_shift)) |
238 readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
241 static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
243 /* If there is a hook and it returns non-zero then there
244 * is an error and the write should be skipped
246 if (host->write16_hook && host->write16_hook(host, addr))
248 writew(val, host->ctl + (addr << host->bus_shift));
251 static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
254 writesw(host->ctl + (addr << host->bus_shift), buf, count);
257 static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
259 writew(val, host->ctl + (addr << host->bus_shift));
260 writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));