554 lines
14 KiB
C
554 lines
14 KiB
C
/*
|
|
* linux/drivers/acorn/scsi/cumana_2.c
|
|
*
|
|
* Copyright (C) 1997-2005 Russell King
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Changelog:
|
|
* 30-08-1997 RMK 0.0.0 Created, READONLY version.
|
|
* 22-01-1998 RMK 0.0.1 Updated to 2.1.80.
|
|
* 15-04-1998 RMK 0.0.1 Only do PIO if FAS216 will allow it.
|
|
* 02-05-1998 RMK 0.0.2 Updated & added DMA support.
|
|
* 27-06-1998 RMK Changed asm/delay.h to linux/delay.h
|
|
* 18-08-1998 RMK 0.0.3 Fixed synchronous transfer depth.
|
|
* 02-04-2000 RMK 0.0.4 Updated for new error handling code.
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/string.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/init.h>
|
|
#include <linux/dma-mapping.h>
|
|
|
|
#include <asm/dma.h>
|
|
#include <asm/ecard.h>
|
|
#include <asm/io.h>
|
|
#include <asm/pgtable.h>
|
|
|
|
#include "../scsi.h"
|
|
#include <scsi/scsi_host.h>
|
|
#include "fas216.h"
|
|
#include "scsi.h"
|
|
|
|
#include <scsi/scsicam.h>
|
|
|
|
#define CUMANASCSI2_STATUS (0x0000)
|
|
#define STATUS_INT (1 << 0)
|
|
#define STATUS_DRQ (1 << 1)
|
|
#define STATUS_LATCHED (1 << 3)
|
|
|
|
#define CUMANASCSI2_ALATCH (0x0014)
|
|
#define ALATCH_ENA_INT (3)
|
|
#define ALATCH_DIS_INT (2)
|
|
#define ALATCH_ENA_TERM (5)
|
|
#define ALATCH_DIS_TERM (4)
|
|
#define ALATCH_ENA_BIT32 (11)
|
|
#define ALATCH_DIS_BIT32 (10)
|
|
#define ALATCH_ENA_DMA (13)
|
|
#define ALATCH_DIS_DMA (12)
|
|
#define ALATCH_DMA_OUT (15)
|
|
#define ALATCH_DMA_IN (14)
|
|
|
|
#define CUMANASCSI2_PSEUDODMA (0x0200)
|
|
|
|
#define CUMANASCSI2_FAS216_OFFSET (0x0300)
|
|
#define CUMANASCSI2_FAS216_SHIFT 2
|
|
|
|
/*
|
|
* Version
|
|
*/
|
|
#define VERSION "1.00 (13/11/2002 2.5.47)"
|
|
|
|
/*
|
|
* Use term=0,1,0,0,0 to turn terminators on/off
|
|
*/
|
|
static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 };
|
|
|
|
#define NR_SG 256
|
|
|
|
struct cumanascsi2_info {
|
|
FAS216_Info info;
|
|
struct expansion_card *ec;
|
|
void __iomem *base;
|
|
unsigned int terms; /* Terminator state */
|
|
struct scatterlist sg[NR_SG]; /* Scatter DMA list */
|
|
};
|
|
|
|
#define CSTATUS_IRQ (1 << 0)
|
|
#define CSTATUS_DRQ (1 << 1)
|
|
|
|
/* Prototype: void cumanascsi_2_irqenable(ec, irqnr)
|
|
* Purpose : Enable interrupts on Cumana SCSI 2 card
|
|
* Params : ec - expansion card structure
|
|
* : irqnr - interrupt number
|
|
*/
|
|
static void
|
|
cumanascsi_2_irqenable(struct expansion_card *ec, int irqnr)
|
|
{
|
|
struct cumanascsi2_info *info = ec->irq_data;
|
|
writeb(ALATCH_ENA_INT, info->base + CUMANASCSI2_ALATCH);
|
|
}
|
|
|
|
/* Prototype: void cumanascsi_2_irqdisable(ec, irqnr)
|
|
* Purpose : Disable interrupts on Cumana SCSI 2 card
|
|
* Params : ec - expansion card structure
|
|
* : irqnr - interrupt number
|
|
*/
|
|
static void
|
|
cumanascsi_2_irqdisable(struct expansion_card *ec, int irqnr)
|
|
{
|
|
struct cumanascsi2_info *info = ec->irq_data;
|
|
writeb(ALATCH_DIS_INT, info->base + CUMANASCSI2_ALATCH);
|
|
}
|
|
|
|
static const expansioncard_ops_t cumanascsi_2_ops = {
|
|
.irqenable = cumanascsi_2_irqenable,
|
|
.irqdisable = cumanascsi_2_irqdisable,
|
|
};
|
|
|
|
/* Prototype: void cumanascsi_2_terminator_ctl(host, on_off)
|
|
* Purpose : Turn the Cumana SCSI 2 terminators on or off
|
|
* Params : host - card to turn on/off
|
|
* : on_off - !0 to turn on, 0 to turn off
|
|
*/
|
|
static void
|
|
cumanascsi_2_terminator_ctl(struct Scsi_Host *host, int on_off)
|
|
{
|
|
struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
|
|
|
|
if (on_off) {
|
|
info->terms = 1;
|
|
writeb(ALATCH_ENA_TERM, info->base + CUMANASCSI2_ALATCH);
|
|
} else {
|
|
info->terms = 0;
|
|
writeb(ALATCH_DIS_TERM, info->base + CUMANASCSI2_ALATCH);
|
|
}
|
|
}
|
|
|
|
/* Prototype: void cumanascsi_2_intr(irq, *dev_id, *regs)
|
|
* Purpose : handle interrupts from Cumana SCSI 2 card
|
|
* Params : irq - interrupt number
|
|
* dev_id - user-defined (Scsi_Host structure)
|
|
*/
|
|
static irqreturn_t
|
|
cumanascsi_2_intr(int irq, void *dev_id)
|
|
{
|
|
struct cumanascsi2_info *info = dev_id;
|
|
|
|
return fas216_intr(&info->info);
|
|
}
|
|
|
|
/* Prototype: fasdmatype_t cumanascsi_2_dma_setup(host, SCpnt, direction, min_type)
|
|
* Purpose : initialises DMA/PIO
|
|
* Params : host - host
|
|
* SCpnt - command
|
|
* direction - DMA on to/off of card
|
|
* min_type - minimum DMA support that we must have for this transfer
|
|
* Returns : type of transfer to be performed
|
|
*/
|
|
static fasdmatype_t
|
|
cumanascsi_2_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp,
|
|
fasdmadir_t direction, fasdmatype_t min_type)
|
|
{
|
|
struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
|
|
struct device *dev = scsi_get_device(host);
|
|
int dmach = info->info.scsi.dma;
|
|
|
|
writeb(ALATCH_DIS_DMA, info->base + CUMANASCSI2_ALATCH);
|
|
|
|
if (dmach != NO_DMA &&
|
|
(min_type == fasdma_real_all || SCp->this_residual >= 512)) {
|
|
int bufs, map_dir, dma_dir, alatch_dir;
|
|
|
|
bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG);
|
|
|
|
if (direction == DMA_OUT)
|
|
map_dir = DMA_TO_DEVICE,
|
|
dma_dir = DMA_MODE_WRITE,
|
|
alatch_dir = ALATCH_DMA_OUT;
|
|
else
|
|
map_dir = DMA_FROM_DEVICE,
|
|
dma_dir = DMA_MODE_READ,
|
|
alatch_dir = ALATCH_DMA_IN;
|
|
|
|
dma_map_sg(dev, info->sg, bufs, map_dir);
|
|
|
|
disable_dma(dmach);
|
|
set_dma_sg(dmach, info->sg, bufs);
|
|
writeb(alatch_dir, info->base + CUMANASCSI2_ALATCH);
|
|
set_dma_mode(dmach, dma_dir);
|
|
enable_dma(dmach);
|
|
writeb(ALATCH_ENA_DMA, info->base + CUMANASCSI2_ALATCH);
|
|
writeb(ALATCH_DIS_BIT32, info->base + CUMANASCSI2_ALATCH);
|
|
return fasdma_real_all;
|
|
}
|
|
|
|
/*
|
|
* If we're not doing DMA,
|
|
* we'll do pseudo DMA
|
|
*/
|
|
return fasdma_pio;
|
|
}
|
|
|
|
/*
|
|
* Prototype: void cumanascsi_2_dma_pseudo(host, SCpnt, direction, transfer)
|
|
* Purpose : handles pseudo DMA
|
|
* Params : host - host
|
|
* SCpnt - command
|
|
* direction - DMA on to/off of card
|
|
* transfer - minimum number of bytes we expect to transfer
|
|
*/
|
|
static void
|
|
cumanascsi_2_dma_pseudo(struct Scsi_Host *host, struct scsi_pointer *SCp,
|
|
fasdmadir_t direction, int transfer)
|
|
{
|
|
struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
|
|
unsigned int length;
|
|
unsigned char *addr;
|
|
|
|
length = SCp->this_residual;
|
|
addr = SCp->ptr;
|
|
|
|
if (direction == DMA_OUT)
|
|
#if 0
|
|
while (length > 1) {
|
|
unsigned long word;
|
|
unsigned int status = readb(info->base + CUMANASCSI2_STATUS);
|
|
|
|
if (status & STATUS_INT)
|
|
goto end;
|
|
|
|
if (!(status & STATUS_DRQ))
|
|
continue;
|
|
|
|
word = *addr | *(addr + 1) << 8;
|
|
writew(word, info->base + CUMANASCSI2_PSEUDODMA);
|
|
addr += 2;
|
|
length -= 2;
|
|
}
|
|
#else
|
|
printk ("PSEUDO_OUT???\n");
|
|
#endif
|
|
else {
|
|
if (transfer && (transfer & 255)) {
|
|
while (length >= 256) {
|
|
unsigned int status = readb(info->base + CUMANASCSI2_STATUS);
|
|
|
|
if (status & STATUS_INT)
|
|
return;
|
|
|
|
if (!(status & STATUS_DRQ))
|
|
continue;
|
|
|
|
readsw(info->base + CUMANASCSI2_PSEUDODMA,
|
|
addr, 256 >> 1);
|
|
addr += 256;
|
|
length -= 256;
|
|
}
|
|
}
|
|
|
|
while (length > 0) {
|
|
unsigned long word;
|
|
unsigned int status = readb(info->base + CUMANASCSI2_STATUS);
|
|
|
|
if (status & STATUS_INT)
|
|
return;
|
|
|
|
if (!(status & STATUS_DRQ))
|
|
continue;
|
|
|
|
word = readw(info->base + CUMANASCSI2_PSEUDODMA);
|
|
*addr++ = word;
|
|
if (--length > 0) {
|
|
*addr++ = word >> 8;
|
|
length --;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Prototype: int cumanascsi_2_dma_stop(host, SCpnt)
|
|
* Purpose : stops DMA/PIO
|
|
* Params : host - host
|
|
* SCpnt - command
|
|
*/
|
|
static void
|
|
cumanascsi_2_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp)
|
|
{
|
|
struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
|
|
if (info->info.scsi.dma != NO_DMA) {
|
|
writeb(ALATCH_DIS_DMA, info->base + CUMANASCSI2_ALATCH);
|
|
disable_dma(info->info.scsi.dma);
|
|
}
|
|
}
|
|
|
|
/* Prototype: const char *cumanascsi_2_info(struct Scsi_Host * host)
|
|
* Purpose : returns a descriptive string about this interface,
|
|
* Params : host - driver host structure to return info for.
|
|
* Returns : pointer to a static buffer containing null terminated string.
|
|
*/
|
|
const char *cumanascsi_2_info(struct Scsi_Host *host)
|
|
{
|
|
struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
|
|
static char string[150];
|
|
|
|
sprintf(string, "%s (%s) in slot %d v%s terminators o%s",
|
|
host->hostt->name, info->info.scsi.type, info->ec->slot_no,
|
|
VERSION, info->terms ? "n" : "ff");
|
|
|
|
return string;
|
|
}
|
|
|
|
/* Prototype: int cumanascsi_2_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
|
|
* Purpose : Set a driver specific function
|
|
* Params : host - host to setup
|
|
* : buffer - buffer containing string describing operation
|
|
* : length - length of string
|
|
* Returns : -EINVAL, or 0
|
|
*/
|
|
static int
|
|
cumanascsi_2_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
|
|
{
|
|
int ret = length;
|
|
|
|
if (length >= 11 && strcmp(buffer, "CUMANASCSI2") == 0) {
|
|
buffer += 11;
|
|
length -= 11;
|
|
|
|
if (length >= 5 && strncmp(buffer, "term=", 5) == 0) {
|
|
if (buffer[5] == '1')
|
|
cumanascsi_2_terminator_ctl(host, 1);
|
|
else if (buffer[5] == '0')
|
|
cumanascsi_2_terminator_ctl(host, 0);
|
|
else
|
|
ret = -EINVAL;
|
|
} else
|
|
ret = -EINVAL;
|
|
} else
|
|
ret = -EINVAL;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Prototype: int cumanascsi_2_proc_info(char *buffer, char **start, off_t offset,
|
|
* int length, int host_no, int inout)
|
|
* Purpose : Return information about the driver to a user process accessing
|
|
* the /proc filesystem.
|
|
* Params : buffer - a buffer to write information to
|
|
* start - a pointer into this buffer set by this routine to the start
|
|
* of the required information.
|
|
* offset - offset into information that we have read upto.
|
|
* length - length of buffer
|
|
* host_no - host number to return information for
|
|
* inout - 0 for reading, 1 for writing.
|
|
* Returns : length of data written to buffer.
|
|
*/
|
|
int cumanascsi_2_proc_info (struct Scsi_Host *host, char *buffer, char **start, off_t offset,
|
|
int length, int inout)
|
|
{
|
|
struct cumanascsi2_info *info;
|
|
char *p = buffer;
|
|
int pos;
|
|
|
|
if (inout == 1)
|
|
return cumanascsi_2_set_proc_info(host, buffer, length);
|
|
|
|
info = (struct cumanascsi2_info *)host->hostdata;
|
|
|
|
p += sprintf(p, "Cumana SCSI II driver v%s\n", VERSION);
|
|
p += fas216_print_host(&info->info, p);
|
|
p += sprintf(p, "Term : o%s\n",
|
|
info->terms ? "n" : "ff");
|
|
|
|
p += fas216_print_stats(&info->info, p);
|
|
p += fas216_print_devices(&info->info, p);
|
|
|
|
*start = buffer + offset;
|
|
pos = p - buffer - offset;
|
|
if (pos > length)
|
|
pos = length;
|
|
|
|
return pos;
|
|
}
|
|
|
|
static struct scsi_host_template cumanascsi2_template = {
|
|
.module = THIS_MODULE,
|
|
.proc_info = cumanascsi_2_proc_info,
|
|
.name = "Cumana SCSI II",
|
|
.info = cumanascsi_2_info,
|
|
.queuecommand = fas216_queue_command,
|
|
.eh_host_reset_handler = fas216_eh_host_reset,
|
|
.eh_bus_reset_handler = fas216_eh_bus_reset,
|
|
.eh_device_reset_handler = fas216_eh_device_reset,
|
|
.eh_abort_handler = fas216_eh_abort,
|
|
.can_queue = 1,
|
|
.this_id = 7,
|
|
.sg_tablesize = SG_ALL,
|
|
.cmd_per_lun = 1,
|
|
.use_clustering = DISABLE_CLUSTERING,
|
|
.proc_name = "cumanascsi2",
|
|
};
|
|
|
|
static int __devinit
|
|
cumanascsi2_probe(struct expansion_card *ec, const struct ecard_id *id)
|
|
{
|
|
struct Scsi_Host *host;
|
|
struct cumanascsi2_info *info;
|
|
unsigned long resbase, reslen;
|
|
void __iomem *base;
|
|
int ret;
|
|
|
|
ret = ecard_request_resources(ec);
|
|
if (ret)
|
|
goto out;
|
|
|
|
resbase = ecard_resource_start(ec, ECARD_RES_MEMC);
|
|
reslen = ecard_resource_len(ec, ECARD_RES_MEMC);
|
|
base = ioremap(resbase, reslen);
|
|
if (!base) {
|
|
ret = -ENOMEM;
|
|
goto out_region;
|
|
}
|
|
|
|
host = scsi_host_alloc(&cumanascsi2_template,
|
|
sizeof(struct cumanascsi2_info));
|
|
if (!host) {
|
|
ret = -ENOMEM;
|
|
goto out_unmap;
|
|
}
|
|
|
|
ecard_set_drvdata(ec, host);
|
|
|
|
info = (struct cumanascsi2_info *)host->hostdata;
|
|
info->ec = ec;
|
|
info->base = base;
|
|
|
|
cumanascsi_2_terminator_ctl(host, term[ec->slot_no]);
|
|
|
|
info->info.scsi.io_base = base + CUMANASCSI2_FAS216_OFFSET;
|
|
info->info.scsi.io_shift = CUMANASCSI2_FAS216_SHIFT;
|
|
info->info.scsi.irq = ec->irq;
|
|
info->info.scsi.dma = ec->dma;
|
|
info->info.ifcfg.clockrate = 40; /* MHz */
|
|
info->info.ifcfg.select_timeout = 255;
|
|
info->info.ifcfg.asyncperiod = 200; /* ns */
|
|
info->info.ifcfg.sync_max_depth = 7;
|
|
info->info.ifcfg.cntl3 = CNTL3_BS8 | CNTL3_FASTSCSI | CNTL3_FASTCLK;
|
|
info->info.ifcfg.disconnect_ok = 1;
|
|
info->info.ifcfg.wide_max_size = 0;
|
|
info->info.ifcfg.capabilities = FASCAP_PSEUDODMA;
|
|
info->info.dma.setup = cumanascsi_2_dma_setup;
|
|
info->info.dma.pseudo = cumanascsi_2_dma_pseudo;
|
|
info->info.dma.stop = cumanascsi_2_dma_stop;
|
|
|
|
ec->irqaddr = info->base + CUMANASCSI2_STATUS;
|
|
ec->irqmask = STATUS_INT;
|
|
ec->irq_data = info;
|
|
ec->ops = &cumanascsi_2_ops;
|
|
|
|
ret = fas216_init(host);
|
|
if (ret)
|
|
goto out_free;
|
|
|
|
ret = request_irq(ec->irq, cumanascsi_2_intr,
|
|
IRQF_DISABLED, "cumanascsi2", info);
|
|
if (ret) {
|
|
printk("scsi%d: IRQ%d not free: %d\n",
|
|
host->host_no, ec->irq, ret);
|
|
goto out_release;
|
|
}
|
|
|
|
if (info->info.scsi.dma != NO_DMA) {
|
|
if (request_dma(info->info.scsi.dma, "cumanascsi2")) {
|
|
printk("scsi%d: DMA%d not free, using PIO\n",
|
|
host->host_no, info->info.scsi.dma);
|
|
info->info.scsi.dma = NO_DMA;
|
|
} else {
|
|
set_dma_speed(info->info.scsi.dma, 180);
|
|
info->info.ifcfg.capabilities |= FASCAP_DMA;
|
|
}
|
|
}
|
|
|
|
ret = fas216_add(host, &ec->dev);
|
|
if (ret == 0)
|
|
goto out;
|
|
|
|
if (info->info.scsi.dma != NO_DMA)
|
|
free_dma(info->info.scsi.dma);
|
|
free_irq(ec->irq, host);
|
|
|
|
out_release:
|
|
fas216_release(host);
|
|
|
|
out_free:
|
|
scsi_host_put(host);
|
|
|
|
out_unmap:
|
|
iounmap(base);
|
|
|
|
out_region:
|
|
ecard_release_resources(ec);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void __devexit cumanascsi2_remove(struct expansion_card *ec)
|
|
{
|
|
struct Scsi_Host *host = ecard_get_drvdata(ec);
|
|
struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
|
|
|
|
ecard_set_drvdata(ec, NULL);
|
|
fas216_remove(host);
|
|
|
|
if (info->info.scsi.dma != NO_DMA)
|
|
free_dma(info->info.scsi.dma);
|
|
free_irq(ec->irq, info);
|
|
|
|
iounmap(info->base);
|
|
|
|
fas216_release(host);
|
|
scsi_host_put(host);
|
|
ecard_release_resources(ec);
|
|
}
|
|
|
|
static const struct ecard_id cumanascsi2_cids[] = {
|
|
{ MANU_CUMANA, PROD_CUMANA_SCSI_2 },
|
|
{ 0xffff, 0xffff },
|
|
};
|
|
|
|
static struct ecard_driver cumanascsi2_driver = {
|
|
.probe = cumanascsi2_probe,
|
|
.remove = __devexit_p(cumanascsi2_remove),
|
|
.id_table = cumanascsi2_cids,
|
|
.drv = {
|
|
.name = "cumanascsi2",
|
|
},
|
|
};
|
|
|
|
static int __init cumanascsi2_init(void)
|
|
{
|
|
return ecard_register_driver(&cumanascsi2_driver);
|
|
}
|
|
|
|
static void __exit cumanascsi2_exit(void)
|
|
{
|
|
ecard_remove_driver(&cumanascsi2_driver);
|
|
}
|
|
|
|
module_init(cumanascsi2_init);
|
|
module_exit(cumanascsi2_exit);
|
|
|
|
MODULE_AUTHOR("Russell King");
|
|
MODULE_DESCRIPTION("Cumana SCSI-2 driver for Acorn machines");
|
|
module_param_array(term, int, NULL, 0);
|
|
MODULE_PARM_DESC(term, "SCSI bus termination");
|
|
MODULE_LICENSE("GPL");
|