265 lines
6.1 KiB
C
265 lines
6.1 KiB
C
#include <linux/types.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/zorro.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <asm/page.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/amigaints.h>
|
|
#include <asm/amigahw.h>
|
|
|
|
#include "scsi.h"
|
|
#include "wd33c93.h"
|
|
#include "a2091.h"
|
|
|
|
|
|
struct a2091_hostdata {
|
|
struct WD33C93_hostdata wh;
|
|
struct a2091_scsiregs *regs;
|
|
};
|
|
|
|
static irqreturn_t a2091_intr(int irq, void *data)
|
|
{
|
|
struct Scsi_Host *instance = data;
|
|
struct a2091_hostdata *hdata = shost_priv(instance);
|
|
unsigned int status = hdata->regs->ISTR;
|
|
unsigned long flags;
|
|
|
|
if (!(status & (ISTR_INT_F | ISTR_INT_P)) || !(status & ISTR_INTS))
|
|
return IRQ_NONE;
|
|
|
|
spin_lock_irqsave(instance->host_lock, flags);
|
|
wd33c93_intr(instance);
|
|
spin_unlock_irqrestore(instance->host_lock, flags);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
|
|
{
|
|
struct Scsi_Host *instance = cmd->device->host;
|
|
struct a2091_hostdata *hdata = shost_priv(instance);
|
|
struct WD33C93_hostdata *wh = &hdata->wh;
|
|
struct a2091_scsiregs *regs = hdata->regs;
|
|
unsigned short cntr = CNTR_PDMD | CNTR_INTEN;
|
|
unsigned long addr = virt_to_bus(cmd->SCp.ptr);
|
|
|
|
/* don't allow DMA if the physical address is bad */
|
|
if (addr & A2091_XFER_MASK) {
|
|
wh->dma_bounce_len = (cmd->SCp.this_residual + 511) & ~0x1ff;
|
|
wh->dma_bounce_buffer = kmalloc(wh->dma_bounce_len,
|
|
GFP_KERNEL);
|
|
|
|
/* can't allocate memory; use PIO */
|
|
if (!wh->dma_bounce_buffer) {
|
|
wh->dma_bounce_len = 0;
|
|
return 1;
|
|
}
|
|
|
|
/* get the physical address of the bounce buffer */
|
|
addr = virt_to_bus(wh->dma_bounce_buffer);
|
|
|
|
/* the bounce buffer may not be in the first 16M of physmem */
|
|
if (addr & A2091_XFER_MASK) {
|
|
/* we could use chipmem... maybe later */
|
|
kfree(wh->dma_bounce_buffer);
|
|
wh->dma_bounce_buffer = NULL;
|
|
wh->dma_bounce_len = 0;
|
|
return 1;
|
|
}
|
|
|
|
if (!dir_in) {
|
|
/* copy to bounce buffer for a write */
|
|
memcpy(wh->dma_bounce_buffer, cmd->SCp.ptr,
|
|
cmd->SCp.this_residual);
|
|
}
|
|
}
|
|
|
|
/* setup dma direction */
|
|
if (!dir_in)
|
|
cntr |= CNTR_DDIR;
|
|
|
|
/* remember direction */
|
|
wh->dma_dir = dir_in;
|
|
|
|
regs->CNTR = cntr;
|
|
|
|
/* setup DMA *physical* address */
|
|
regs->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);
|
|
}
|
|
/* start DMA */
|
|
regs->ST_DMA = 1;
|
|
|
|
/* return success */
|
|
return 0;
|
|
}
|
|
|
|
static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
|
|
int status)
|
|
{
|
|
struct a2091_hostdata *hdata = shost_priv(instance);
|
|
struct WD33C93_hostdata *wh = &hdata->wh;
|
|
struct a2091_scsiregs *regs = hdata->regs;
|
|
|
|
/* disable SCSI interrupts */
|
|
unsigned short cntr = CNTR_PDMD;
|
|
|
|
if (!wh->dma_dir)
|
|
cntr |= CNTR_DDIR;
|
|
|
|
/* disable SCSI interrupts */
|
|
regs->CNTR = cntr;
|
|
|
|
/* flush if we were reading */
|
|
if (wh->dma_dir) {
|
|
regs->FLUSH = 1;
|
|
while (!(regs->ISTR & ISTR_FE_FLG))
|
|
;
|
|
}
|
|
|
|
/* clear a possible interrupt */
|
|
regs->CINT = 1;
|
|
|
|
/* stop DMA */
|
|
regs->SP_DMA = 1;
|
|
|
|
/* restore the CONTROL bits (minus the direction flag) */
|
|
regs->CNTR = CNTR_PDMD | CNTR_INTEN;
|
|
|
|
/* copy from a bounce buffer, if necessary */
|
|
if (status && wh->dma_bounce_buffer) {
|
|
if (wh->dma_dir)
|
|
memcpy(SCpnt->SCp.ptr, wh->dma_bounce_buffer,
|
|
SCpnt->SCp.this_residual);
|
|
kfree(wh->dma_bounce_buffer);
|
|
wh->dma_bounce_buffer = NULL;
|
|
wh->dma_bounce_len = 0;
|
|
}
|
|
}
|
|
|
|
static struct scsi_host_template a2091_scsi_template = {
|
|
.module = THIS_MODULE,
|
|
.name = "Commodore A2091/A590 SCSI",
|
|
.show_info = wd33c93_show_info,
|
|
.write_info = wd33c93_write_info,
|
|
.proc_name = "A2901",
|
|
.queuecommand = wd33c93_queuecommand,
|
|
.eh_abort_handler = wd33c93_abort,
|
|
.eh_host_reset_handler = wd33c93_host_reset,
|
|
.can_queue = CAN_QUEUE,
|
|
.this_id = 7,
|
|
.sg_tablesize = SG_ALL,
|
|
.cmd_per_lun = CMD_PER_LUN,
|
|
.use_clustering = DISABLE_CLUSTERING
|
|
};
|
|
|
|
static int a2091_probe(struct zorro_dev *z, const struct zorro_device_id *ent)
|
|
{
|
|
struct Scsi_Host *instance;
|
|
int error;
|
|
struct a2091_scsiregs *regs;
|
|
wd33c93_regs wdregs;
|
|
struct a2091_hostdata *hdata;
|
|
|
|
if (!request_mem_region(z->resource.start, 256, "wd33c93"))
|
|
return -EBUSY;
|
|
|
|
instance = scsi_host_alloc(&a2091_scsi_template,
|
|
sizeof(struct a2091_hostdata));
|
|
if (!instance) {
|
|
error = -ENOMEM;
|
|
goto fail_alloc;
|
|
}
|
|
|
|
instance->irq = IRQ_AMIGA_PORTS;
|
|
instance->unique_id = z->slotaddr;
|
|
|
|
regs = ZTWO_VADDR(z->resource.start);
|
|
regs->DAWR = DAWR_A2091;
|
|
|
|
wdregs.SASR = ®s->SASR;
|
|
wdregs.SCMD = ®s->SCMD;
|
|
|
|
hdata = shost_priv(instance);
|
|
hdata->wh.no_sync = 0xff;
|
|
hdata->wh.fast = 0;
|
|
hdata->wh.dma_mode = CTRL_DMA;
|
|
hdata->regs = regs;
|
|
|
|
wd33c93_init(instance, wdregs, dma_setup, dma_stop, WD33C93_FS_8_10);
|
|
error = request_irq(IRQ_AMIGA_PORTS, a2091_intr, IRQF_SHARED,
|
|
"A2091 SCSI", instance);
|
|
if (error)
|
|
goto fail_irq;
|
|
|
|
regs->CNTR = CNTR_PDMD | CNTR_INTEN;
|
|
|
|
error = scsi_add_host(instance, NULL);
|
|
if (error)
|
|
goto fail_host;
|
|
|
|
zorro_set_drvdata(z, instance);
|
|
|
|
scsi_scan_host(instance);
|
|
return 0;
|
|
|
|
fail_host:
|
|
free_irq(IRQ_AMIGA_PORTS, instance);
|
|
fail_irq:
|
|
scsi_host_put(instance);
|
|
fail_alloc:
|
|
release_mem_region(z->resource.start, 256);
|
|
return error;
|
|
}
|
|
|
|
static void a2091_remove(struct zorro_dev *z)
|
|
{
|
|
struct Scsi_Host *instance = zorro_get_drvdata(z);
|
|
struct a2091_hostdata *hdata = shost_priv(instance);
|
|
|
|
hdata->regs->CNTR = 0;
|
|
scsi_remove_host(instance);
|
|
free_irq(IRQ_AMIGA_PORTS, instance);
|
|
scsi_host_put(instance);
|
|
release_mem_region(z->resource.start, 256);
|
|
}
|
|
|
|
static struct zorro_device_id a2091_zorro_tbl[] = {
|
|
{ ZORRO_PROD_CBM_A590_A2091_1 },
|
|
{ ZORRO_PROD_CBM_A590_A2091_2 },
|
|
{ 0 }
|
|
};
|
|
MODULE_DEVICE_TABLE(zorro, a2091_zorro_tbl);
|
|
|
|
static struct zorro_driver a2091_driver = {
|
|
.name = "a2091",
|
|
.id_table = a2091_zorro_tbl,
|
|
.probe = a2091_probe,
|
|
.remove = a2091_remove,
|
|
};
|
|
|
|
static int __init a2091_init(void)
|
|
{
|
|
return zorro_register_driver(&a2091_driver);
|
|
}
|
|
module_init(a2091_init);
|
|
|
|
static void __exit a2091_exit(void)
|
|
{
|
|
zorro_unregister_driver(&a2091_driver);
|
|
}
|
|
module_exit(a2091_exit);
|
|
|
|
MODULE_DESCRIPTION("Commodore A2091/A590 SCSI");
|
|
MODULE_LICENSE("GPL");
|