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yaml
---
r: 198889
b: refs/heads/master
c: d753722
h: refs/heads/master
i:
  198887: d50ea10
v: v3
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Geert Uytterhoeven committed May 26, 2010
1 parent 9ca9d83 commit 42bf9ac
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Showing 2 changed files with 26 additions and 20 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 6869b15efccce954a28d14c84b25350d125e2f93
refs/heads/master: d753722ee0223f80e6d0a553c68583c6ae57c1b2
44 changes: 25 additions & 19 deletions trunk/drivers/scsi/a3000.c
Original file line number Diff line number Diff line change
Expand Up @@ -22,16 +22,15 @@
#include <linux/stat.h>


#define DMA(ptr) ((a3000_scsiregs *)((ptr)->base))

static struct Scsi_Host *a3000_host = NULL;

static int a3000_release(struct Scsi_Host *instance);

static irqreturn_t a3000_intr(int irq, void *dummy)
{
a3000_scsiregs *regs = (a3000_scsiregs *)(a3000_host->base);
unsigned int status = regs->ISTR;
unsigned long flags;
unsigned int status = DMA(a3000_host)->ISTR;

if (!(status & ISTR_INT_P))
return IRQ_NONE;
Expand All @@ -48,6 +47,7 @@ static irqreturn_t a3000_intr(int irq, void *dummy)
static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
{
struct WD33C93_hostdata *hdata = shost_priv(a3000_host);
a3000_scsiregs *regs = (a3000_scsiregs *)(a3000_host->base);
unsigned short cntr = CNTR_PDMD | CNTR_INTEN;
unsigned long addr = virt_to_bus(cmd->SCp.ptr);

Expand Down Expand Up @@ -84,10 +84,10 @@ static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
/* remember direction */
hdata->dma_dir = dir_in;

DMA(a3000_host)->CNTR = cntr;
regs->CNTR = cntr;

/* setup DMA *physical* address */
DMA(a3000_host)->ACR = addr;
regs->ACR = addr;

if (dir_in) {
/* invalidate any cache */
Expand All @@ -99,7 +99,7 @@ static int dma_setup(struct scsi_cmnd *cmd, int dir_in)

/* start DMA */
mb(); /* make sure setup is completed */
DMA(a3000_host)->ST_DMA = 1;
regs->ST_DMA = 1;
mb(); /* make sure DMA has started before next IO */

/* return success */
Expand All @@ -110,21 +110,22 @@ static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
int status)
{
struct WD33C93_hostdata *hdata = shost_priv(instance);
a3000_scsiregs *regs = (a3000_scsiregs *)(instance->base);

/* disable SCSI interrupts */
unsigned short cntr = CNTR_PDMD;

if (!hdata->dma_dir)
cntr |= CNTR_DDIR;

DMA(instance)->CNTR = cntr;
regs->CNTR = cntr;
mb(); /* make sure CNTR is updated before next IO */

/* flush if we were reading */
if (hdata->dma_dir) {
DMA(instance)->FLUSH = 1;
regs->FLUSH = 1;
mb(); /* don't allow prefetch */
while (!(DMA(instance)->ISTR & ISTR_FE_FLG))
while (!(regs->ISTR & ISTR_FE_FLG))
barrier();
mb(); /* no IO until FLUSH is done */
}
Expand All @@ -133,14 +134,14 @@ static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
/* I think that this CINT is only necessary if you are
* using the terminal count features. HM 7 Mar 1994
*/
DMA(instance)->CINT = 1;
regs->CINT = 1;

/* stop DMA */
DMA(instance)->SP_DMA = 1;
regs->SP_DMA = 1;
mb(); /* make sure DMA is stopped before next IO */

/* restore the CONTROL bits (minus the direction flag) */
DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN;
regs->CNTR = CNTR_PDMD | CNTR_INTEN;
mb(); /* make sure CNTR is updated before next IO */

/* copy from a bounce buffer, if necessary */
Expand All @@ -163,7 +164,8 @@ static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,

static int __init a3000_detect(struct scsi_host_template *tpnt)
{
wd33c93_regs regs;
wd33c93_regs wdregs;
a3000_scsiregs *regs;
struct WD33C93_hostdata *hdata;

if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(A3000_SCSI))
Expand All @@ -180,18 +182,20 @@ static int __init a3000_detect(struct scsi_host_template *tpnt)

a3000_host->base = ZTWO_VADDR(0xDD0000);
a3000_host->irq = IRQ_AMIGA_PORTS;
DMA(a3000_host)->DAWR = DAWR_A3000;
regs.SASR = &(DMA(a3000_host)->SASR);
regs.SCMD = &(DMA(a3000_host)->SCMD);
regs = (a3000_scsiregs *)(a3000_host->base);
regs->DAWR = DAWR_A3000;
wdregs.SASR = &regs->SASR;
wdregs.SCMD = &regs->SCMD;
hdata = shost_priv(a3000_host);
hdata->no_sync = 0xff;
hdata->fast = 0;
hdata->dma_mode = CTRL_DMA;
wd33c93_init(a3000_host, regs, dma_setup, dma_stop, WD33C93_FS_12_15);
wd33c93_init(a3000_host, wdregs, dma_setup, dma_stop,
WD33C93_FS_12_15);
if (request_irq(IRQ_AMIGA_PORTS, a3000_intr, IRQF_SHARED, "A3000 SCSI",
a3000_intr))
goto fail_irq;
DMA(a3000_host)->CNTR = CNTR_PDMD | CNTR_INTEN;
regs->CNTR = CNTR_PDMD | CNTR_INTEN;

return 1;

Expand Down Expand Up @@ -239,7 +243,9 @@ static struct scsi_host_template driver_template = {

static int a3000_release(struct Scsi_Host *instance)
{
DMA(instance)->CNTR = 0;
a3000_scsiregs *regs = (a3000_scsiregs *)(instance->base);

regs->CNTR = 0;
release_mem_region(0xDD0000, 256);
free_irq(IRQ_AMIGA_PORTS, a3000_intr);
return 1;
Expand Down

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