aboutsummaryrefslogtreecommitdiff
path: root/drivers/scsi/a3000.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/scsi/a3000.c')
-rw-r--r--drivers/scsi/a3000.c285
1 files changed, 143 insertions, 142 deletions
diff --git a/drivers/scsi/a3000.c b/drivers/scsi/a3000.c
index c35fc55f1c9..bc6eb69f5fd 100644
--- a/drivers/scsi/a3000.c
+++ b/drivers/scsi/a3000.c
@@ -19,26 +19,25 @@
#include "wd33c93.h"
#include "a3000.h"
-#include<linux/stat.h>
+#include <linux/stat.h>
-#define DMA(ptr) ((a3000_scsiregs *)((ptr)->base))
-#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
+
+#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)
+static irqreturn_t a3000_intr(int irq, void *dummy)
{
unsigned long flags;
unsigned int status = DMA(a3000_host)->ISTR;
if (!(status & ISTR_INT_P))
return IRQ_NONE;
- if (status & ISTR_INTS)
- {
+ if (status & ISTR_INTS) {
spin_lock_irqsave(a3000_host->host_lock, flags);
- wd33c93_intr (a3000_host);
+ wd33c93_intr(a3000_host);
spin_unlock_irqrestore(a3000_host->host_lock, flags);
return IRQ_HANDLED;
}
@@ -48,162 +47,165 @@ static irqreturn_t a3000_intr (int irq, void *dummy)
static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
{
- unsigned short cntr = CNTR_PDMD | CNTR_INTEN;
- unsigned long addr = virt_to_bus(cmd->SCp.ptr);
-
- /*
- * if the physical address has the wrong alignment, or if
- * physical address is bad, or if it is a write and at the
- * end of a physical memory chunk, then allocate a bounce
- * buffer
- */
- if (addr & A3000_XFER_MASK)
- {
- HDATA(a3000_host)->dma_bounce_len = (cmd->SCp.this_residual + 511)
- & ~0x1ff;
- HDATA(a3000_host)->dma_bounce_buffer =
- kmalloc (HDATA(a3000_host)->dma_bounce_len, GFP_KERNEL);
-
- /* can't allocate memory; use PIO */
- if (!HDATA(a3000_host)->dma_bounce_buffer) {
- HDATA(a3000_host)->dma_bounce_len = 0;
- return 1;
- }
-
- if (!dir_in) {
- /* copy to bounce buffer for a write */
- memcpy (HDATA(a3000_host)->dma_bounce_buffer,
- cmd->SCp.ptr, cmd->SCp.this_residual);
+ struct WD33C93_hostdata *hdata = shost_priv(a3000_host);
+ unsigned short cntr = CNTR_PDMD | CNTR_INTEN;
+ unsigned long addr = virt_to_bus(cmd->SCp.ptr);
+
+ /*
+ * if the physical address has the wrong alignment, or if
+ * physical address is bad, or if it is a write and at the
+ * end of a physical memory chunk, then allocate a bounce
+ * buffer
+ */
+ if (addr & A3000_XFER_MASK) {
+ hdata->dma_bounce_len = (cmd->SCp.this_residual + 511) & ~0x1ff;
+ hdata->dma_bounce_buffer = kmalloc(hdata->dma_bounce_len,
+ GFP_KERNEL);
+
+ /* can't allocate memory; use PIO */
+ if (!hdata->dma_bounce_buffer) {
+ hdata->dma_bounce_len = 0;
+ return 1;
+ }
+
+ if (!dir_in) {
+ /* copy to bounce buffer for a write */
+ memcpy(hdata->dma_bounce_buffer, cmd->SCp.ptr,
+ cmd->SCp.this_residual);
+ }
+
+ addr = virt_to_bus(hdata->dma_bounce_buffer);
}
- addr = virt_to_bus(HDATA(a3000_host)->dma_bounce_buffer);
- }
+ /* setup dma direction */
+ if (!dir_in)
+ cntr |= CNTR_DDIR;
- /* setup dma direction */
- if (!dir_in)
- cntr |= CNTR_DDIR;
+ /* remember direction */
+ hdata->dma_dir = dir_in;
- /* remember direction */
- HDATA(a3000_host)->dma_dir = dir_in;
+ DMA(a3000_host)->CNTR = cntr;
- DMA(a3000_host)->CNTR = cntr;
+ /* setup DMA *physical* address */
+ DMA(a3000_host)->ACR = addr;
- /* setup DMA *physical* address */
- DMA(a3000_host)->ACR = addr;
-
- if (dir_in)
- /* invalidate any cache */
- cache_clear (addr, cmd->SCp.this_residual);
- else
- /* push any dirty cache */
- cache_push (addr, cmd->SCp.this_residual);
+ if (dir_in) {
+ /* invalidate any cache */
+ cache_clear(addr, cmd->SCp.this_residual);
+ } else {
+ /* push any dirty cache */
+ cache_push(addr, cmd->SCp.this_residual);
+ }
- /* start DMA */
- mb(); /* make sure setup is completed */
- DMA(a3000_host)->ST_DMA = 1;
- mb(); /* make sure DMA has started before next IO */
+ /* start DMA */
+ mb(); /* make sure setup is completed */
+ DMA(a3000_host)->ST_DMA = 1;
+ mb(); /* make sure DMA has started before next IO */
- /* return success */
- return 0;
+ /* return success */
+ return 0;
}
static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
int status)
{
- /* disable SCSI interrupts */
- unsigned short cntr = CNTR_PDMD;
-
- if (!HDATA(instance)->dma_dir)
- cntr |= CNTR_DDIR;
-
- DMA(instance)->CNTR = cntr;
- mb(); /* make sure CNTR is updated before next IO */
-
- /* flush if we were reading */
- if (HDATA(instance)->dma_dir) {
- DMA(instance)->FLUSH = 1;
- mb(); /* don't allow prefetch */
- while (!(DMA(instance)->ISTR & ISTR_FE_FLG))
- barrier();
- mb(); /* no IO until FLUSH is done */
- }
-
- /* clear a possible interrupt */
- /* I think that this CINT is only necessary if you are
- * using the terminal count features. HM 7 Mar 1994
- */
- DMA(instance)->CINT = 1;
-
- /* stop DMA */
- DMA(instance)->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;
- mb(); /* make sure CNTR is updated before next IO */
-
- /* copy from a bounce buffer, if necessary */
- if (status && HDATA(instance)->dma_bounce_buffer) {
- if (SCpnt) {
- if (HDATA(instance)->dma_dir && SCpnt)
- memcpy (SCpnt->SCp.ptr,
- HDATA(instance)->dma_bounce_buffer,
- SCpnt->SCp.this_residual);
- kfree (HDATA(instance)->dma_bounce_buffer);
- HDATA(instance)->dma_bounce_buffer = NULL;
- HDATA(instance)->dma_bounce_len = 0;
- } else {
- kfree (HDATA(instance)->dma_bounce_buffer);
- HDATA(instance)->dma_bounce_buffer = NULL;
- HDATA(instance)->dma_bounce_len = 0;
+ struct WD33C93_hostdata *hdata = shost_priv(instance);
+
+ /* disable SCSI interrupts */
+ unsigned short cntr = CNTR_PDMD;
+
+ if (!hdata->dma_dir)
+ cntr |= CNTR_DDIR;
+
+ DMA(instance)->CNTR = cntr;
+ mb(); /* make sure CNTR is updated before next IO */
+
+ /* flush if we were reading */
+ if (hdata->dma_dir) {
+ DMA(instance)->FLUSH = 1;
+ mb(); /* don't allow prefetch */
+ while (!(DMA(instance)->ISTR & ISTR_FE_FLG))
+ barrier();
+ mb(); /* no IO until FLUSH is done */
+ }
+
+ /* clear a possible interrupt */
+ /* I think that this CINT is only necessary if you are
+ * using the terminal count features. HM 7 Mar 1994
+ */
+ DMA(instance)->CINT = 1;
+
+ /* stop DMA */
+ DMA(instance)->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;
+ mb(); /* make sure CNTR is updated before next IO */
+
+ /* copy from a bounce buffer, if necessary */
+ if (status && hdata->dma_bounce_buffer) {
+ if (SCpnt) {
+ if (hdata->dma_dir && SCpnt)
+ memcpy(SCpnt->SCp.ptr,
+ hdata->dma_bounce_buffer,
+ SCpnt->SCp.this_residual);
+ kfree(hdata->dma_bounce_buffer);
+ hdata->dma_bounce_buffer = NULL;
+ hdata->dma_bounce_len = 0;
+ } else {
+ kfree(hdata->dma_bounce_buffer);
+ hdata->dma_bounce_buffer = NULL;
+ hdata->dma_bounce_len = 0;
+ }
}
- }
}
static int __init a3000_detect(struct scsi_host_template *tpnt)
{
- wd33c93_regs regs;
-
- if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(A3000_SCSI))
- return 0;
- if (!request_mem_region(0xDD0000, 256, "wd33c93"))
- return 0;
-
- tpnt->proc_name = "A3000";
- tpnt->proc_info = &wd33c93_proc_info;
-
- a3000_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata));
- if (a3000_host == NULL)
- goto fail_register;
-
- 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);
- HDATA(a3000_host)->no_sync = 0xff;
- HDATA(a3000_host)->fast = 0;
- HDATA(a3000_host)->dma_mode = CTRL_DMA;
- wd33c93_init(a3000_host, regs, 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;
-
- return 1;
+ wd33c93_regs regs;
+ struct WD33C93_hostdata *hdata;
+
+ if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(A3000_SCSI))
+ return 0;
+ if (!request_mem_region(0xDD0000, 256, "wd33c93"))
+ return 0;
+
+ tpnt->proc_name = "A3000";
+ tpnt->proc_info = &wd33c93_proc_info;
+
+ a3000_host = scsi_register(tpnt, sizeof(struct WD33C93_hostdata));
+ if (a3000_host == NULL)
+ goto fail_register;
+
+ 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);
+ 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);
+ 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;
+
+ return 1;
fail_irq:
- wd33c93_release();
- scsi_unregister(a3000_host);
+ scsi_unregister(a3000_host);
fail_register:
- release_mem_region(0xDD0000, 256);
- return 0;
+ release_mem_region(0xDD0000, 256);
+ return 0;
}
static int a3000_bus_reset(struct scsi_cmnd *cmd)
{
/* FIXME perform bus-specific reset */
-
+
/* FIXME 2: kill this entire function, which should
cause mid-layer to call wd33c93_host_reset anyway? */
@@ -237,11 +239,10 @@ static struct scsi_host_template driver_template = {
static int a3000_release(struct Scsi_Host *instance)
{
- wd33c93_release();
- DMA(instance)->CNTR = 0;
- release_mem_region(0xDD0000, 256);
- free_irq(IRQ_AMIGA_PORTS, a3000_intr);
- return 1;
+ DMA(instance)->CNTR = 0;
+ release_mem_region(0xDD0000, 256);
+ free_irq(IRQ_AMIGA_PORTS, a3000_intr);
+ return 1;
}
MODULE_LICENSE("GPL");
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-22 20:11:47 +0000