Viewing file:  ecoscsi.c (6.96 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
#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
*/
/*
* Options :
*
* PARITY - enable parity checking. Not supported.
*
* SCSI2 - enable support for SCSI-II tagged queueing. Untested.
*
* USLEEP - enable support for devices that don't disconnect. Untested.
*/
/*
* $Log: ecoscsi.c,v $
* Revision 1.2 1998/03/08 05:49:47 davem
* Merge to 2.1.89
*
* Revision 1.1 1998/02/23 02:45:24 davem
* Merge to 2.1.88
*
*/
#include <linux/module.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/blk.h>
#include <asm/io.h>
#include <asm/system.h>
#include "../../scsi/scsi.h"
#include "../../scsi/hosts.h"
#include "../../scsi/NCR5380.h"
#include "../../scsi/constants.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) {
}
/*
* Function : int ecoscsi_detect(Scsi_Host_Template * tpnt)
*
* Purpose : initializes ecoscsi NCR5380 driver based on the
* command line / compile time port and irq definitions.
*
* Inputs : tpnt - template for this SCSI adapter.
*
* Returns : 1 if a host adapter was found, 0 if not.
*
*/
int ecoscsi_detect(Scsi_Host_Template * tpnt)
{
struct Scsi_Host *instance;
tpnt->proc_name = "ecoscsi";
instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
instance->io_port = 0x80ce8000;
instance->n_io_port = 144;
instance->irq = IRQ_NONE;
if (check_region (instance->io_port, instance->n_io_port)) {
scsi_unregister (instance);
return 0;
}
ecoscsi_write (instance, MODE_REG, 0x20); /* Is it really SCSI? */
if (ecoscsi_read (instance, MODE_REG) != 0x20) { /* Write to a reg. */
scsi_unregister(instance);
return 0; /* and try to read */
}
ecoscsi_write( instance, MODE_REG, 0x00 ); /* it back. */
if (ecoscsi_read (instance, MODE_REG) != 0x00) {
scsi_unregister(instance);
return 0;
}
NCR5380_init(instance, 0);
request_region (instance->io_port, instance->n_io_port, "ecoscsi");
if (instance->irq != IRQ_NONE)
if (request_irq(instance->irq, do_ecoscsi_intr, SA_INTERRUPT, "ecoscsi", NULL)) {
printk("scsi%d: IRQ%d not free, interrupts disabled\n",
instance->host_no, instance->irq);
instance->irq = IRQ_NONE;
}
if (instance->irq != IRQ_NONE) {
printk("scsi%d: eek! Interrupts enabled, but I don't think\n", instance->host_no);
printk("scsi%d: that the board had an interrupt!\n", instance->host_no);
}
printk("scsi%d: at port %X irq", instance->host_no, instance->io_port);
if (instance->irq == IRQ_NONE)
printk ("s disabled");
else
printk (" %d", instance->irq);
printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
CAN_QUEUE, CMD_PER_LUN, ECOSCSI_PUBLIC_RELEASE);
printk("\nscsi%d:", instance->host_no);
NCR5380_print_options(instance);
printk("\n");
return 1;
}
int ecoscsi_release (struct Scsi_Host *shpnt)
{
if (shpnt->irq != IRQ_NONE)
free_irq (shpnt->irq, NULL);
if (shpnt->io_port)
release_region (shpnt->io_port, shpnt->n_io_port);
return 0;
}
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 *instance, unsigned char *addr,
int len)
{
int iobase = instance->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 *instance, unsigned char *addr,
int len)
{
int iobase = instance->io_port;
int iobase2= instance->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 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 do_NCR5380_intr do_ecoscsi_intr
#define NCR5380_queue_command ecoscsi_queue_command
#define NCR5380_abort ecoscsi_abort
#define NCR5380_reset ecoscsi_reset
#define NCR5380_proc_info ecoscsi_proc_info
int NCR5380_proc_info(char *buffer, char **start, off_t offset,
int length, int hostno, int inout);
#define BOARD_NORMAL 0
#define BOARD_NCR53C400 1
#include "../../scsi/NCR5380.c"
static Scsi_Host_Template ecoscsi_template = {
module: THIS_MODULE,
name: "Serial Port EcoSCSI NCR5380",
detect: ecoscsi_detect,
release: ecoscsi_release,
info: ecoscsi_info,
queuecommand: ecoscsi_queue_command,
abort: ecoscsi_abort,
reset: ecoscsi_reset,
can_queue: 16,
this_id: 7,
sg_tablesize: SG_ALL,
cmd_per_lun: 2,
use_clustering: DISABLE_CLUSTERING
};
static int __init ecoscsi_init(void)
{
scsi_register_module(MODULE_SCSI_HA, &ecoscsi_template);
if (ecoscsi_template.present)
return 0;
scsi_unregister_module(MODULE_SCSI_HA, &ecoscsi_template);
return -ENODEV;
}
static void __exit ecoscsi_exit(void)
{
scsi_unregister_module(MODULE_SCSI_HA, &ecoscsi_template);
}
module_init(ecoscsi_init);
module_exit(ecoscsi_exit);
MODULE_AUTHOR("Russell King");
MODULE_DESCRIPTION("Econet-SCSI driver for Acorn machines");
MODULE_LICENSE("GPL");
EXPORT_NO_SYMBOLS;
|