iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
linux/drivers/scsi/arm/cumana_1.c
Finn Thain 6c4b88ca59 ncr5380: Use DMA hooks for PDMA 
Those wrapper drivers which use DMA define the REAL_DMA macro and
those which use pseudo DMA define PSEUDO_DMA. These macros need to be
removed for a number of reasons, not least of which is to have drivers
share more code.

Redefine the PDMA send and receive hooks as DMA setup hooks, so that the
DMA code can be shared by all 5380 wrapper drivers. This will help to
reunify the forked core driver.

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

324 lines
7.3 KiB
C
Raw Blame History

/*
* 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_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);
return len;
}
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);
return len;
}
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);
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");
Reference in New Issue View Git Blame Copy Permalink