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#define AUTOSENSE
/* #define PSEUDO_DMA */
/*
* EcoSCSI Generic NCR5380 driver
*
* Copyright 1995, Russell King
*
* ALPHA RELEASE 1.
*
* For more information, please consult
*
* NCR 5380 Family
* SCSI Protocol Controller
* Databook
*
* NCR Microelectronics
* 1635 Aeroplaza Drive
* Colorado Springs, CO 80916
* 1+ (719) 578-3400
* 1+ (800) 334-5454
*/
#include <linux/module.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <asm/io.h>
#include <asm/system.h>
#include "../scsi.h"
#include <scsi/scsi_host.h>
#define NCR5380_implementation_fields int port, ctrl
#define NCR5380_local_declare() struct Scsi_Host *_instance
#define NCR5380_setup(instance) _instance = instance
#define NCR5380_read(reg) ecoscsi_read(_instance, reg)
#define NCR5380_write(reg, value) ecoscsi_write(_instance, reg, value)
#define NCR5380_intr ecoscsi_intr
#define NCR5380_queue_command ecoscsi_queue_command
#define NCR5380_proc_info ecoscsi_proc_info
#include "../NCR5380.h"
#define ECOSCSI_PUBLIC_RELEASE 1
static char ecoscsi_read(struct Scsi_Host *instance, int reg)
{
int iobase = instance->io_port;
outb(reg | 8, iobase);
return inb(iobase + 1);
}
static void ecoscsi_write(struct Scsi_Host *instance, int reg, int value)
{
int iobase = instance->io_port;
outb(reg | 8, iobase);
outb(value, iobase + 1);
}
/*
* Function : ecoscsi_setup(char *str, int *ints)
*
* Purpose : LILO command line initialization of the overrides array,
*
* Inputs : str - unused, ints - array of integer parameters with ints[0]
* equal to the number of ints.
*
*/
void ecoscsi_setup(char *str, int *ints)
{
}
const char * ecoscsi_info (struct Scsi_Host *spnt)
{
return "";
}
#if 0
#define STAT(p) inw(p + 144)
static inline int NCR5380_pwrite(struct Scsi_Host *host, unsigned char *addr,
int len)
{
int iobase = host->io_port;
printk("writing %p len %d\n",addr, len);
if(!len) return -1;
while(1)
{
int status;
while(((status = STAT(iobase)) & 0x100)==0);
}
}
static inline int NCR5380_pread(struct Scsi_Host *host, unsigned char *addr,
int len)
{
int iobase = host->io_port;
int iobase2= host->io_port + 0x100;
unsigned char *start = addr;
int s;
printk("reading %p len %d\n",addr, len);
outb(inb(iobase + 128), iobase + 135);
while(len > 0)
{
int status,b,i, timeout;
timeout = 0x07FFFFFF;
while(((status = STAT(iobase)) & 0x100)==0)
{
timeout--;
if(status & 0x200 || !timeout)
{
printk("status = %p\n",status);
outb(0, iobase + 135);
return 1;
}
}
if(len >= 128)
{
for(i=0; i<64; i++)
{
b = inw(iobase + 136);
*addr++ = b;
*addr++ = b>>8;
}
len -= 128;
}
else
{
b = inw(iobase + 136);
*addr ++ = b;
len -= 1;
if(len)
*addr ++ = b>>8;
len -= 1;
}
}
outb(0, iobase + 135);
printk("first bytes = %02X %02X %02X %20X %02X %02X %02X\n",*start, start[1], start[2], start[3], start[4], start[5], start[6]);
return 1;
}
#endif
#undef STAT
#define BOARD_NORMAL 0
#define BOARD_NCR53C400 1
#include "../NCR5380.c"
static Scsi_Host_Template ecoscsi_template = {
.module = THIS_MODULE,
.name = "Serial Port EcoSCSI NCR5380",
.proc_name = "ecoscsi",
.info = ecoscsi_info,
.queuecommand = ecoscsi_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
};
static struct Scsi_Host *host;
static int __init ecoscsi_init(void)
{
host = scsi_host_alloc(tpnt, sizeof(struct NCR5380_hostdata));
if (!host)
return 0;
host->io_port = 0x80ce8000;
host->n_io_port = 144;
host->irq = IRQ_NONE;
if (!(request_region(host->io_port, host->n_io_port, "ecoscsi")) )
goto unregister_scsi;
ecoscsi_write(host, MODE_REG, 0x20); /* Is it really SCSI? */
if (ecoscsi_read(host, MODE_REG) != 0x20) /* Write to a reg. */
goto release_reg;
ecoscsi_write(host, MODE_REG, 0x00 ); /* it back. */
if (ecoscsi_read(host, MODE_REG) != 0x00)
goto release_reg;
NCR5380_init(host, 0);
printk("scsi%d: at port 0x%08lx irqs disabled", host->host_no, host->io_port);
printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
host->can_queue, host->cmd_per_lun, ECOSCSI_PUBLIC_RELEASE);
printk("\nscsi%d:", host->host_no);
NCR5380_print_options(host);
printk("\n");
scsi_add_host(host, NULL); /* XXX handle failure */
scsi_scan_host(host);
return 0;
release_reg:
release_region(host->io_port, host->n_io_port);
unregister_scsi:
scsi_host_put(host);
return -ENODEV;
}
static void __exit ecoscsi_exit(void)
{
scsi_remove_host(host);
if (shpnt->irq != IRQ_NONE)
free_irq(shpnt->irq, NULL);
NCR5380_exit(host);
if (shpnt->io_port)
release_region(shpnt->io_port, shpnt->n_io_port);
scsi_host_put(host);
return 0;
}
module_init(ecoscsi_init);
module_exit(ecoscsi_exit);
MODULE_AUTHOR("Russell King");
MODULE_DESCRIPTION("Econet-SCSI driver for Acorn machines");
MODULE_LICENSE("GPL");
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