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linux/drivers/scsi/arm/cumana_1.c
Finn Thain 8053b0ee79 ncr5380: Merge DMA implementation from atari_NCR5380 core driver 
Adopt the DMA implementation from atari_NCR5380.c. This means that
atari_scsi and sun3_scsi can make use of the NCR5380.c core driver
and the atari_NCR5380.c driver fork can be made redundant.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-04-11 16:57:09 -04:00

331 lines
7.4 KiB
C
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/*
* Generic Generic NCR5380 driver
*
* Copyright 1995-2002, Russell King
*/
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/blkdev.h>
#include <linux/init.h>
#include <asm/ecard.h>
#include <asm/io.h>
#include <scsi/scsi_host.h>
#define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)
#define NCR5380_read(reg) cumanascsi_read(instance, reg)
#define NCR5380_write(reg, value) cumanascsi_write(instance, reg, value)
#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize)
#define NCR5380_dma_recv_setup cumanascsi_pread
#define NCR5380_dma_send_setup cumanascsi_pwrite
#define NCR5380_dma_residual(instance) (0)
#define NCR5380_intr cumanascsi_intr
#define NCR5380_queue_command cumanascsi_queue_command
#define NCR5380_info cumanascsi_info
#define NCR5380_implementation_fields \
unsigned ctrl; \
void __iomem *base; \
void __iomem *dma
#include "../NCR5380.h"
void cumanascsi_setup(char *str, int *ints)
{
}
#define CTRL 0x16fc
#define STAT 0x2004
#define L(v) (((v)<<16)|((v) & 0x0000ffff))
#define H(v) (((v)>>16)|((v) & 0xffff0000))
static inline int cumanascsi_pwrite(struct Scsi_Host *host,
unsigned char *addr, int len)
{
unsigned long *laddr;
void __iomem *dma = priv(host)->dma + 0x2000;
if(!len) return 0;
writeb(0x02, priv(host)->base + CTRL);
laddr = (unsigned long *)addr;
while(len >= 32)
{
unsigned int status;
unsigned long v;
status = readb(priv(host)->base + STAT);
if(status & 0x80)
goto end;
if(!(status & 0x40))
continue;
v=*laddr++; writew(L(v), dma); writew(H(v), dma);
v=*laddr++; writew(L(v), dma); writew(H(v), dma);
v=*laddr++; writew(L(v), dma); writew(H(v), dma);
v=*laddr++; writew(L(v), dma); writew(H(v), dma);
v=*laddr++; writew(L(v), dma); writew(H(v), dma);
v=*laddr++; writew(L(v), dma); writew(H(v), dma);
v=*laddr++; writew(L(v), dma); writew(H(v), dma);
v=*laddr++; writew(L(v), dma); writew(H(v), dma);
len -= 32;
if(len == 0)
break;
}
addr = (unsigned char *)laddr;
writeb(0x12, priv(host)->base + CTRL);
while(len > 0)
{
unsigned int status;
status = readb(priv(host)->base + STAT);
if(status & 0x80)
goto end;
if(status & 0x40)
{
writeb(*addr++, dma);
if(--len == 0)
break;
}
status = readb(priv(host)->base + STAT);
if(status & 0x80)
goto end;
if(status & 0x40)
{
writeb(*addr++, dma);
if(--len == 0)
break;
}
}
end:
writeb(priv(host)->ctrl | 0x40, priv(host)->base + CTRL);
if (len)
return -1;
return 0;
}
static inline int cumanascsi_pread(struct Scsi_Host *host,
unsigned char *addr, int len)
{
unsigned long *laddr;
void __iomem *dma = priv(host)->dma + 0x2000;
if(!len) return 0;
writeb(0x00, priv(host)->base + CTRL);
laddr = (unsigned long *)addr;
while(len >= 32)
{
unsigned int status;
status = readb(priv(host)->base + STAT);
if(status & 0x80)
goto end;
if(!(status & 0x40))
continue;
*laddr++ = readw(dma) | (readw(dma) << 16);
*laddr++ = readw(dma) | (readw(dma) << 16);
*laddr++ = readw(dma) | (readw(dma) << 16);
*laddr++ = readw(dma) | (readw(dma) << 16);
*laddr++ = readw(dma) | (readw(dma) << 16);
*laddr++ = readw(dma) | (readw(dma) << 16);
*laddr++ = readw(dma) | (readw(dma) << 16);
*laddr++ = readw(dma) | (readw(dma) << 16);
len -= 32;
if(len == 0)
break;
}
addr = (unsigned char *)laddr;
writeb(0x10, priv(host)->base + CTRL);
while(len > 0)
{
unsigned int status;
status = readb(priv(host)->base + STAT);
if(status & 0x80)
goto end;
if(status & 0x40)
{
*addr++ = readb(dma);
if(--len == 0)
break;
}
status = readb(priv(host)->base + STAT);
if(status & 0x80)
goto end;
if(status & 0x40)
{
*addr++ = readb(dma);
if(--len == 0)
break;
}
}
end:
writeb(priv(host)->ctrl | 0x40, priv(host)->base + CTRL);
if (len)
return -1;
return 0;
}
static unsigned char cumanascsi_read(struct Scsi_Host *host, unsigned int reg)
{
void __iomem *base = priv(host)->base;
unsigned char val;
writeb(0, base + CTRL);
val = readb(base + 0x2100 + (reg << 2));
priv(host)->ctrl = 0x40;
writeb(0x40, base + CTRL);
return val;
}
static void cumanascsi_write(struct Scsi_Host *host, unsigned int reg, unsigned int value)
{
void __iomem *base = priv(host)->base;
writeb(0, base + CTRL);
writeb(value, base + 0x2100 + (reg << 2));
priv(host)->ctrl = 0x40;
writeb(0x40, base + CTRL);
}
#include "../NCR5380.c"
static struct scsi_host_template cumanascsi_template = {
.module = THIS_MODULE,
.name = "Cumana 16-bit SCSI",
.info = cumanascsi_info,
.queuecommand = cumanascsi_queue_command,
.eh_abort_handler = NCR5380_abort,
.eh_bus_reset_handler = NCR5380_bus_reset,
.can_queue = 16,
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
.proc_name = "CumanaSCSI-1",
.cmd_size = NCR5380_CMD_SIZE,
.max_sectors = 128,
};
static int cumanascsi1_probe(struct expansion_card *ec,
const struct ecard_id *id)
{
struct Scsi_Host *host;
int ret;
ret = ecard_request_resources(ec);
if (ret)
goto out;
host = scsi_host_alloc(&cumanascsi_template, sizeof(struct NCR5380_hostdata));
if (!host) {
ret = -ENOMEM;
goto out_release;
}
priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_IOCSLOW),
ecard_resource_len(ec, ECARD_RES_IOCSLOW));
priv(host)->dma = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
ecard_resource_len(ec, ECARD_RES_MEMC));
if (!priv(host)->base || !priv(host)->dma) {
ret = -ENOMEM;
goto out_unmap;
}
host->irq = ec->irq;
ret = NCR5380_init(host, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP);
if (ret)
goto out_unmap;
NCR5380_maybe_reset_bus(host);
priv(host)->ctrl = 0;
writeb(0, priv(host)->base + CTRL);
ret = request_irq(host->irq, cumanascsi_intr, 0,
"CumanaSCSI-1", host);
if (ret) {
printk("scsi%d: IRQ%d not free: %d\n",
host->host_no, host->irq, ret);
goto out_exit;
}
ret = scsi_add_host(host, &ec->dev);
if (ret)
goto out_free_irq;
scsi_scan_host(host);
goto out;
out_free_irq:
free_irq(host->irq, host);
out_exit:
NCR5380_exit(host);
out_unmap:
iounmap(priv(host)->base);
iounmap(priv(host)->dma);
scsi_host_put(host);
out_release:
ecard_release_resources(ec);
out:
return ret;
}
static void cumanascsi1_remove(struct expansion_card *ec)
{
struct Scsi_Host *host = ecard_get_drvdata(ec);
ecard_set_drvdata(ec, NULL);
scsi_remove_host(host);
free_irq(host->irq, host);
NCR5380_exit(host);
iounmap(priv(host)->base);
iounmap(priv(host)->dma);
scsi_host_put(host);
ecard_release_resources(ec);
}
static const struct ecard_id cumanascsi1_cids[] = {
{ MANU_CUMANA, PROD_CUMANA_SCSI_1 },
{ 0xffff, 0xffff }
};
static struct ecard_driver cumanascsi1_driver = {
.probe = cumanascsi1_probe,
.remove = cumanascsi1_remove,
.id_table = cumanascsi1_cids,
.drv = {
.name = "cumanascsi1",
},
};
static int __init cumanascsi_init(void)
{
return ecard_register_driver(&cumanascsi1_driver);
}
static void __exit cumanascsi_exit(void)
{
ecard_remove_driver(&cumanascsi1_driver);
}
module_init(cumanascsi_init);
module_exit(cumanascsi_exit);
MODULE_DESCRIPTION("Cumana SCSI-1 driver for Acorn machines");
MODULE_LICENSE("GPL");
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