NetBSD/sys/arch/i386/stand/as.c

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1994-10-27 07:14:23 +03:00
/* $NetBSD: as.c,v 1.4 1994/10/27 04:21:45 cgd Exp $ */
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/*
* sys/i386/stand/as.c
*
* Standalone driver for Adaptech 1542 SCSI
*
* Pace Willisson pace@blitz.com April 8, 1992
*/
#include "param.h"
#include "disklabel.h"
#include "i386/isa/asreg.h"
#include "saio.h"
#ifdef ASDEBUG
#define ASPRINT(x) { printf x; DELAY (10000); }
#else
#define ASPRINT(x)
#endif
#define NRETRIES 3
int as_port = 0x330;
struct mailbox_entry mailbox[2];
int
asopen(io)
struct iob *io;
{
struct disklabel *dd;
char cdb[6];
char data[12];
int val;
int oval;
int i;
struct iob aio;
if (io->i_unit < 0 || io->i_unit > 8
|| io->i_part < 0 || io->i_part > 8
|| io->i_ctlr < 0 || io->i_ctlr > 0)
return (-1);
/* dma setup: see page 5-31 in the Adaptech manual */
outb (0xd6, 0xc1);
outb (0xd4, 0x01);
ASPRINT (("resetting adaptech card... "));
outb (as_port + AS_CONTROL, AS_CONTROL_SRST);
/* delay a little */
for (i = 0; i < 100; i++)
inb (0x84);
while (inb (as_port + AS_STATUS) != (AS_STATUS_INIT | AS_STATUS_IDLE))
;
ASPRINT (("reset ok "));
as_put_byte (AS_CMD_MAILBOX_INIT);
as_put_byte (1); /* one mailbox out, one in */
as_put_byte ((int)mailbox >> 16);
as_put_byte ((int)mailbox >> 8);
as_put_byte ((int)mailbox);
while (inb (as_port + AS_STATUS) & AS_STATUS_INIT)
;
ASPRINT (("mailbox init ok "));
/* do mode select to set the logical block size */
bzero (cdb, 6);
cdb[0] = 0x15; /* MODE SELECT */
cdb[4] = 12; /* parameter list length */
bzero (data, 12);
data[3] = 8; /* block descriptor length */
data[9] = DEV_BSIZE >> 16;
data[10] = DEV_BSIZE >> 8;
data[11] = DEV_BSIZE;
if (ascmd (io->i_unit, 0, cdb, 6, data, 12, 1) < 0) {
printf ("as%d: error setting logical block size\n",
io->i_unit);
return (-1);
}
aio = *io;
aio.i_bn = LABELSECTOR;
aio.i_cc = DEV_BSIZE;
/*io->i_ma = buf;*/
aio.i_boff = 0;
#ifdef was
if (asstrategy (&aio, F_READ) == DEV_BSIZE) {
dd = (struct disklabel *)aio.i_ma;
io->i_boff = dd->d_partitions[io->i_part].p_offset;
ASPRINT (("partition offset %d ", io->i_boff));
}
#else
{
extern struct disklabel disklabel;
io->i_boff = disklabel.d_partitions[io->i_part].p_offset;
ASPRINT (("partition offset %d ", io->i_boff));
}
#endif
ASPRINT (("asopen ok "));
return(0);
}
/* func is F_WRITE or F_READ
* io->i_unit, io->i_part, io->i_bn is starting block
* io->i_cc is byte count
* io->i_ma is memory address
* io->i_boff is block offset for this partition (set up in asopen)
*/
int
asstrategy(io, func)
struct iob *io;
{
char cdb[6];
int blkno;
int retry;
ASPRINT (("asstrategy(target=%d, block=%d+%d, count=%d) ",
io->i_unit, io->i_bn, io->i_boff, io->i_cc));
if (func == F_WRITE) {
printf ("as%d: write not supported\n", io->i_unit);
return (0);
}
if (io->i_cc == 0)
return (0);
if (io->i_cc % DEV_BSIZE != 0) {
printf ("as%d: transfer size not multiple of %d\n",
io->i_unit, DEV_BSIZE);
return (0);
}
/* retry in case we get a unit-attention error, which just
* means the drive has been reset since the last command
*/
for (retry = 0; retry < NRETRIES; retry++) {
blkno = io->i_bn + io->i_boff;
cdb[0] = 8; /* scsi read opcode */
cdb[1] = (blkno >> 16) & 0x1f;
cdb[2] = blkno >> 8;
cdb[3] = blkno;
cdb[4] = io->i_cc / DEV_BSIZE;
cdb[5] = 0; /* control byte (used in linking) */
if (ascmd (io->i_unit, 1, cdb, 6, io->i_ma, io->i_cc,
retry == NRETRIES - 1) >= 0) {
ASPRINT (("asstrategy ok "));
return (io->i_cc);
}
}
ASPRINT (("asstrategy failed "));
return (0);
}
int
ascmd (target, readflag, cdb, cdblen, data, datalen, printerr)
int target;
int readflag;
char *cdb;
int cdblen;
char *data;
int datalen;
int printerr;
{
struct ccb ccb;
int physaddr;
unsigned char *sp;
int i;
if (mailbox[0].cmd != 0)
/* this can't happen, unless the card flakes */
_stop ("asstart: mailbox not available\n");
bzero (&ccb, sizeof ccb);
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ccb.ccb_opcode = 0;
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ccb.ccb_addr_and_control = target << 5;
if (datalen != 0)
ccb.ccb_addr_and_control |= readflag ? 8 : 0x10;
else
ccb.ccb_addr_and_control |= 0x18;
ccb.ccb_data_len_msb = datalen >> 16;
ccb.ccb_data_len_mid = datalen >> 8;
ccb.ccb_data_len_lsb = datalen;
ccb.ccb_requst_sense_allocation_len = MAXSENSE;
physaddr = (int)data;
ccb.ccb_data_ptr_msb = physaddr >> 16;
ccb.ccb_data_ptr_mid = physaddr >> 8;
ccb.ccb_data_ptr_lsb = physaddr;
ccb.ccb_scsi_command_len = cdblen;
bcopy (cdb, ccb.ccb_cdb, cdblen);
#ifdef ASDEBUG
printf ("ccb: ");
for (i = 0; i < 48; i++)
printf ("%x ", ((unsigned char *)&ccb)[i]);
printf ("\n");
/*getchar ();*/
#endif
physaddr = (int)&ccb;
mailbox[0].msb = physaddr >> 16;
mailbox[0].mid = physaddr >> 8;
mailbox[0].lsb = physaddr;
mailbox[0].cmd = 1;
/* tell controller to look in its mailbox */
outb (as_port + AS_CONTROL, AS_CONTROL_IRST);
as_put_byte (AS_CMD_START_SCSI_COMMAND);
/* wait for status */
ASPRINT (("waiting for status..."));
while (mailbox[1].cmd == 0)
;
mailbox[1].cmd = 0;
if (ccb.ccb_host_status != 0 || ccb.ccb_target_status != 0) {
#ifdef ASDEBUG
printerr = 1;
#endif
if (printerr) {
printf ("as%d error: hst=%x tst=%x sense=",
target,
ccb.ccb_host_status,
ccb.ccb_target_status);
sp = ccb_sense (&ccb);
for (i = 0; i < 8; i++)
printf ("%x ", sp[i]);
printf ("\n");
#ifdef ASDEBUG
/*getchar ();*/
#endif
}
return (-1);
}
ASPRINT (("ascmd ok "));
return (0);
}
int
as_put_byte (val)
int val;
{
while (inb (as_port + AS_STATUS) & AS_STATUS_CDF)
;
outb (as_port + AS_DATA_OUT, val);
}