*
* Sun3 DMA routines added by Sam Creasey (sammy@sammy.net)
*
+ * VME support added by Sam Creasey
+ *
+ * TODO: modify this driver to support multiple Sun3 SCSI VME boards
+ *
* Adapted from mac_scsinew.c:
*/
/*
* USLEEP - enable support for devices that don't disconnect. Untested.
*/
-/*
- * $Log: sun3_NCR5380.c,v $
- */
-
#define AUTOSENSE
#include <linux/types.h>
#include <asm/idprom.h>
#include <asm/machines.h>
-#define NDEBUG 0
-
-#define NDEBUG_ABORT 0x00100000
-#define NDEBUG_TAGS 0x00200000
-#define NDEBUG_MERGING 0x00400000
-
/* dma on! */
#define REAL_DMA
#include "scsi.h"
-#include "initio.h"
#include <scsi/scsi_host.h>
#include "sun3_scsi.h"
+#include "NCR5380.h"
-static void NCR5380_print(struct Scsi_Host *instance);
-
-/* #define OLDDMA */
+extern int sun3_map_test(unsigned long, char *);
#define USE_WRAPPER
/*#define RESET_BOOT */
/* #define SUPPORT_TAGS */
+#ifdef SUN3_SCSI_VME
+#define ENABLE_IRQ()
+#else
#define ENABLE_IRQ() enable_irq( IRQ_SUN3_SCSI );
+#endif
static irqreturn_t scsi_sun3_intr(int irq, void *dummy);
static struct scsi_cmnd *sun3_dma_setup_done = NULL;
+#define RESET_RUN_DONE
+
#define AFTER_RESET_DELAY (HZ/2)
/* ms to wait after hitting dma regs */
static volatile unsigned char *sun3_scsi_regp;
static volatile struct sun3_dma_regs *dregs;
-#ifdef OLDDMA
-static unsigned char *dmabuf = NULL; /* dma memory buffer */
-#endif
+#ifndef SUN3_SCSI_VME
static struct sun3_udc_regs *udc_regs = NULL;
+#endif
static unsigned char *sun3_dma_orig_addr = NULL;
static unsigned long sun3_dma_orig_count = 0;
static int sun3_dma_active = 0;
sun3_scsi_regp[reg] = value;
}
+#ifndef SUN3_SCSI_VME
/* dma controller register access functions */
static inline unsigned short sun3_udc_read(unsigned char reg)
dregs->udc_data = val;
udelay(SUN3_DMA_DELAY);
}
+#endif
/*
* XXX: status debug
*
*/
-int __init sun3scsi_detect(struct scsi_host_template * tpnt)
+static int __init sun3scsi_detect(struct scsi_host_template *tpnt)
{
- unsigned long ioaddr;
+ unsigned long ioaddr, irq;
static int called = 0;
struct Scsi_Host *instance;
+#ifdef SUN3_SCSI_VME
+ int i;
+ unsigned long addrs[3] = { IOBASE_SUN3_VMESCSI,
+ IOBASE_SUN3_VMESCSI + 0x4000,
+ 0 };
+ unsigned long vecs[3] = { SUN3_VEC_VMESCSI0,
+ SUN3_VEC_VMESCSI1,
+ 0 };
+#endif
/* check that this machine has an onboard 5380 */
switch(idprom->id_machtype) {
+#ifdef SUN3_SCSI_VME
+ case SM_SUN3|SM_3_160:
+ case SM_SUN3|SM_3_260:
+ break;
+#else
case SM_SUN3|SM_3_50:
case SM_SUN3|SM_3_60:
break;
+#endif
default:
return 0;
if(called)
return 0;
+#ifdef SUN3_SCSI_VME
+ tpnt->proc_name = "Sun3 5380 VME SCSI";
+#else
tpnt->proc_name = "Sun3 5380 SCSI";
+#endif
/* setup variables */
tpnt->can_queue =
tpnt->this_id = 7;
}
+#ifdef SUN3_SCSI_VME
+ ioaddr = 0;
+ for (i = 0; addrs[i] != 0; i++) {
+ unsigned char x;
+
+ ioaddr = (unsigned long)sun3_ioremap(addrs[i], PAGE_SIZE,
+ SUN3_PAGE_TYPE_VME16);
+ irq = vecs[i];
+ sun3_scsi_regp = (unsigned char *)ioaddr;
+
+ dregs = (struct sun3_dma_regs *)(((unsigned char *)ioaddr) + 8);
+
+ if (sun3_map_test((unsigned long)dregs, &x)) {
+ unsigned short oldcsr;
+
+ oldcsr = dregs->csr;
+ dregs->csr = 0;
+ udelay(SUN3_DMA_DELAY);
+ if (dregs->csr == 0x1400)
+ break;
+
+ dregs->csr = oldcsr;
+ }
+
+ iounmap((void *)ioaddr);
+ ioaddr = 0;
+ }
+
+ if (!ioaddr)
+ return 0;
+#else
+ irq = IRQ_SUN3_SCSI;
ioaddr = (unsigned long)ioremap(IOBASE_SUN3_SCSI, PAGE_SIZE);
sun3_scsi_regp = (unsigned char *)ioaddr;
printk("SUN3 Scsi couldn't allocate DVMA memory!\n");
return 0;
}
-#ifdef OLDDMA
- if((dmabuf = dvma_malloc_align(SUN3_DVMA_BUFSIZE, 0x10000)) == NULL) {
- printk("SUN3 Scsi couldn't allocate DVMA memory!\n");
- return 0;
- }
#endif
#ifdef SUPPORT_TAGS
if (setup_use_tagged_queuing < 0)
default_instance = instance;
instance->io_port = (unsigned long) ioaddr;
- instance->irq = IRQ_SUN3_SCSI;
+ instance->irq = irq;
NCR5380_init(instance, 0);
#endif
}
- printk("scsi%d: Sun3 5380 at port %lX irq", instance->host_no, instance->io_port);
+ pr_info("scsi%d: %s at port %lX irq", instance->host_no,
+ tpnt->proc_name, instance->io_port);
if (instance->irq == SCSI_IRQ_NONE)
printk ("s disabled");
else
dregs->csr = CSR_SCSI | CSR_FIFO | CSR_INTR;
udelay(SUN3_DMA_DELAY);
dregs->fifo_count = 0;
+#ifdef SUN3_SCSI_VME
+ dregs->fifo_count_hi = 0;
+ dregs->dma_addr_hi = 0;
+ dregs->dma_addr_lo = 0;
+ dregs->dma_count_hi = 0;
+ dregs->dma_count_lo = 0;
+
+ dregs->ivect = VME_DATA24 | (instance->irq & 0xff);
+#endif
called = 1;
}
#endif
-const char * sun3scsi_info (struct Scsi_Host *spnt) {
+static const char *sun3scsi_info(struct Scsi_Host *spnt)
+{
return "";
}
unsigned short csr = dregs->csr;
int handled = 0;
+#ifdef SUN3_SCSI_VME
+ dregs->csr &= ~CSR_DMA_ENABLE;
+#endif
+
if(csr & ~CSR_GOOD) {
if(csr & CSR_DMA_BUSERR) {
printk("scsi%d: bus error in dma\n", default_instance->host_no);
/* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */
static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag)
{
-#ifdef OLDDMA
- if(write_flag)
- memcpy(dmabuf, data, count);
- else {
- sun3_dma_orig_addr = data;
- sun3_dma_orig_count = count;
- }
-#else
void *addr;
if(sun3_dma_orig_addr != NULL)
dvma_unmap(sun3_dma_orig_addr);
-// addr = sun3_dvma_page((unsigned long)data, (unsigned long)dmabuf);
+#ifdef SUN3_SCSI_VME
+ addr = (void *)dvma_map_vme((unsigned long) data, count);
+#else
addr = (void *)dvma_map((unsigned long) data, count);
+#endif
sun3_dma_orig_addr = addr;
sun3_dma_orig_count = count;
-#endif
+
+#ifndef SUN3_SCSI_VME
dregs->fifo_count = 0;
sun3_udc_write(UDC_RESET, UDC_CSR);
/* reset fifo */
dregs->csr &= ~CSR_FIFO;
dregs->csr |= CSR_FIFO;
+#endif
/* set direction */
if(write_flag)
else
dregs->csr &= ~CSR_SEND;
+#ifdef SUN3_SCSI_VME
+ dregs->csr |= CSR_PACK_ENABLE;
+
+ dregs->dma_addr_hi = ((unsigned long)addr >> 16);
+ dregs->dma_addr_lo = ((unsigned long)addr & 0xffff);
+
+ dregs->dma_count_hi = 0;
+ dregs->dma_count_lo = 0;
+ dregs->fifo_count_hi = 0;
+ dregs->fifo_count = 0;
+#else
/* byte count for fifo */
dregs->fifo_count = count;
printk("scsi%d: fifo_mismatch %04x not %04x\n",
default_instance->host_no, dregs->fifo_count,
(unsigned int) count);
- NCR5380_print(default_instance);
+ NCR5380_dprint(NDEBUG_DMA, default_instance);
}
/* setup udc */
-#ifdef OLDDMA
- udc_regs->addr_hi = ((dvma_vtob(dmabuf) & 0xff0000) >> 8);
- udc_regs->addr_lo = (dvma_vtob(dmabuf) & 0xffff);
-#else
udc_regs->addr_hi = (((unsigned long)(addr) & 0xff0000) >> 8);
udc_regs->addr_lo = ((unsigned long)(addr) & 0xffff);
-#endif
udc_regs->count = count/2; /* count in words */
udc_regs->mode_hi = UDC_MODE_HIWORD;
if(write_flag) {
/* interrupt enable */
sun3_udc_write(UDC_INT_ENABLE, UDC_CSR);
+#endif
return count;
}
+#ifndef SUN3_SCSI_VME
static inline unsigned long sun3scsi_dma_count(struct Scsi_Host *instance)
{
unsigned short resid;
return (unsigned long) resid;
}
+#endif
static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance)
{
static inline int sun3scsi_dma_start(unsigned long count, unsigned char *data)
{
+#ifdef SUN3_SCSI_VME
+ unsigned short csr;
+
+ csr = dregs->csr;
+ dregs->dma_count_hi = (sun3_dma_orig_count >> 16);
+ dregs->dma_count_lo = (sun3_dma_orig_count & 0xffff);
+
+ dregs->fifo_count_hi = (sun3_dma_orig_count >> 16);
+ dregs->fifo_count = (sun3_dma_orig_count & 0xffff);
+
+/* if(!(csr & CSR_DMA_ENABLE))
+ * dregs->csr |= CSR_DMA_ENABLE;
+ */
+#else
sun3_udc_write(UDC_CHN_START, UDC_CSR);
+#endif
return 0;
}
/* clean up after our dma is done */
static int sun3scsi_dma_finish(int write_flag)
{
- unsigned short count;
+ unsigned short __maybe_unused count;
unsigned short fifo;
int ret = 0;
sun3_dma_active = 0;
-#if 1
+
+#ifdef SUN3_SCSI_VME
+ dregs->csr &= ~CSR_DMA_ENABLE;
+
+ fifo = dregs->fifo_count;
+ if (write_flag) {
+ if ((fifo > 0) && (fifo < sun3_dma_orig_count))
+ fifo++;
+ }
+
+ last_residual = fifo;
+ /* empty bytes from the fifo which didn't make it */
+ if ((!write_flag) && (dregs->csr & CSR_LEFT)) {
+ unsigned char *vaddr;
+
+ vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr);
+
+ vaddr += (sun3_dma_orig_count - fifo);
+ vaddr--;
+
+ switch (dregs->csr & CSR_LEFT) {
+ case CSR_LEFT_3:
+ *vaddr = (dregs->bpack_lo & 0xff00) >> 8;
+ vaddr--;
+
+ case CSR_LEFT_2:
+ *vaddr = (dregs->bpack_hi & 0x00ff);
+ vaddr--;
+
+ case CSR_LEFT_1:
+ *vaddr = (dregs->bpack_hi & 0xff00) >> 8;
+ break;
+ }
+ }
+#else
// check to empty the fifo on a read
if(!write_flag) {
int tmo = 20000; /* .2 sec */
udelay(10);
}
}
-
-#endif
count = sun3scsi_dma_count(default_instance);
-#ifdef OLDDMA
-
- /* if we've finished a read, copy out the data we read */
- if(sun3_dma_orig_addr) {
- /* check for residual bytes after dma end */
- if(count && (NCR5380_read(BUS_AND_STATUS_REG) &
- (BASR_PHASE_MATCH | BASR_ACK))) {
- printk("scsi%d: sun3_scsi_finish: read overrun baby... ", default_instance->host_no);
- printk("basr now %02x\n", NCR5380_read(BUS_AND_STATUS_REG));
- ret = count;
- }
-
- /* copy in what we dma'd no matter what */
- memcpy(sun3_dma_orig_addr, dmabuf, sun3_dma_orig_count);
- sun3_dma_orig_addr = NULL;
-
- }
-#else
fifo = dregs->fifo_count;
last_residual = fifo;
vaddr[-2] = (data & 0xff00) >> 8;
vaddr[-1] = (data & 0xff);
}
+#endif
dvma_unmap(sun3_dma_orig_addr);
sun3_dma_orig_addr = NULL;
-#endif
+
+#ifdef SUN3_SCSI_VME
+ dregs->dma_addr_hi = 0;
+ dregs->dma_addr_lo = 0;
+ dregs->dma_count_hi = 0;
+ dregs->dma_count_lo = 0;
+
+ dregs->fifo_count = 0;
+ dregs->fifo_count_hi = 0;
+
+ dregs->csr &= ~CSR_SEND;
+/* dregs->csr |= CSR_DMA_ENABLE; */
+#else
sun3_udc_write(UDC_RESET, UDC_CSR);
dregs->fifo_count = 0;
dregs->csr &= ~CSR_SEND;
/* reset fifo */
dregs->csr &= ~CSR_FIFO;
dregs->csr |= CSR_FIFO;
+#endif
sun3_dma_setup_done = NULL;
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