Viewing file:  mvme147.c (3.22 KB) -rw-r--r--
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#include <linux/types.h>
#include <linux/mm.h>
#include <linux/blk.h>
#include <linux/sched.h>
#include <linux/version.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/mvme147hw.h>
#include <asm/irq.h>
#include "scsi.h"
#include "hosts.h"
#include "wd33c93.h"
#include "mvme147.h"
#include<linux/stat.h>
#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
static struct Scsi_Host *mvme147_host = NULL;
static void mvme147_intr (int irq, void *dummy, struct pt_regs *fp)
{
if (irq == MVME147_IRQ_SCSI_PORT)
wd33c93_intr (mvme147_host);
else
m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
}
static int dma_setup (Scsi_Cmnd *cmd, int dir_in)
{
unsigned char flags = 0x01;
unsigned long addr = virt_to_bus(cmd->SCp.ptr);
/* setup dma direction */
if (!dir_in)
flags |= 0x04;
/* remember direction */
HDATA(mvme147_host)->dma_dir = dir_in;
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 */
m147_pcc->dma_bcr = cmd->SCp.this_residual | (1<<24);
m147_pcc->dma_dadr = addr;
m147_pcc->dma_cntrl = flags;
/* return success */
return 0;
}
static void dma_stop (struct Scsi_Host *instance, Scsi_Cmnd *SCpnt,
int status)
{
m147_pcc->dma_cntrl = 0;
}
int mvme147_detect(Scsi_Host_Template *tpnt)
{
static unsigned char called = 0;
wd33c93_regs regs;
if (!MACH_IS_MVME147 || called)
return 0;
called++;
tpnt->proc_name = "MVME147";
tpnt->proc_info = &wd33c93_proc_info;
mvme147_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata));
if (!mvme147_host)
goto err_out;
mvme147_host->base = 0xfffe4000;
mvme147_host->irq = MVME147_IRQ_SCSI_PORT;
regs.SASR = (volatile unsigned char *)0xfffe4000;
regs.SCMD = (volatile unsigned char *)0xfffe4001;
wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", mvme147_intr))
goto err_unregister;
if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", mvme147_intr))
goto err_free_irq;
#if 0 /* Disabled; causes problems booting */
m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */
udelay(100);
m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */
udelay(2000);
m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */
#endif
m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */
m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */
m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
return 1;
err_free_irq:
free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
err_unregister:
wd33c93_release();
scsi_unregister(mvme147_host);
err_out:
return 0;
}
#define HOSTS_C
#include "mvme147.h"
static Scsi_Host_Template driver_template = MVME147_SCSI;
#include "scsi_module.c"
int mvme147_release(struct Scsi_Host *instance)
{
#ifdef MODULE
/* XXX Make sure DMA is stopped! */
wd33c93_release();
free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);
#endif
return 1;
}
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