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NetBSD/sys/arch/sun3/dev/si.c

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/* $NetBSD: si.c,v 1.17 1995/06/01 20:22:36 gwr Exp $ */
/*
* Copyright (C) 1994 Adam Glass, Gordon W. Ross
* Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo,
* Michael L. Finch, Bradley A. Grantham, and
* Lawrence A. Kesteloot
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the Alice Group.
* 4. The names of the Alice Group or any of its members may not be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define DEBUG 1
/* XXX - Need to add support for real DMA. -gwr */
/* #define PSEUDO_DMA 1 (broken) */
#include <sys/types.h>
#include <sys/malloc.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <machine/isr.h>
#include <machine/obio.h>
#include <scsi/scsi_all.h>
#include <scsi/scsi_debug.h>
#include <scsi/scsiconf.h>
#include "scsi_defs.h"
#include "scsi_5380.h"
#include "scsi_sunsi.h"
#ifdef DEBUG
static int si_debug = 0;
static int si_flags = 0 /* | SDEV_DB2 */ ;
#endif
#define SCI_PHASE_DISC 0 /* sort of ... */
#define SCI_CLR_INTR(regs) ((volatile)(regs->sci_iack))
#define SCI_ACK(ptr,phase) (ptr)->sci_tcmd = (phase)
#define SCSI_TIMEOUT_VAL 1000000
#define WAIT_FOR_NOT_REQ(ptr) { \
int scsi_timeout = SCSI_TIMEOUT_VAL; \
while ( ((ptr)->sci_bus_csr & SCI_BUS_REQ) && \
((ptr)->sci_bus_csr & SCI_BUS_REQ) && \
((ptr)->sci_bus_csr & SCI_BUS_REQ) && \
(--scsi_timeout) ); \
if (!scsi_timeout) { \
printf("scsi timeout--WAIT_FOR_NOT_REQ---%s, line %d.\n", \
__FILE__, __LINE__); \
goto scsi_timeout_error; \
} \
}
#define WAIT_FOR_REQ(ptr) { \
int scsi_timeout = SCSI_TIMEOUT_VAL; \
while ( (((ptr)->sci_bus_csr & SCI_BUS_REQ) == 0) && \
(((ptr)->sci_bus_csr & SCI_BUS_REQ) == 0) && \
(((ptr)->sci_bus_csr & SCI_BUS_REQ) == 0) && \
(--scsi_timeout) ); \
if (!scsi_timeout) { \
printf("scsi timeout--WAIT_FOR_REQ---%s, line %d.\n", \
__FILE__, __LINE__); \
goto scsi_timeout_error; \
} \
}
#define WAIT_FOR_BSY(ptr) { \
int scsi_timeout = SCSI_TIMEOUT_VAL; \
while ( (((ptr)->sci_bus_csr & SCI_BUS_BSY) == 0) && \
(((ptr)->sci_bus_csr & SCI_BUS_BSY) == 0) && \
(((ptr)->sci_bus_csr & SCI_BUS_BSY) == 0) && \
(--scsi_timeout) ); \
if (!scsi_timeout) { \
printf("scsi timeout--WAIT_FOR_BSY---%s, line %d.\n", \
__FILE__, __LINE__); \
goto scsi_timeout_error; \
} \
}
#define ARBITRATION_RETRIES 1000
#ifdef DDB
int Debugger();
#else
#define Debugger() panic("Should call Debugger here %s:%d", \
__FILE__, __LINE__)
#endif
struct ncr5380_softc {
struct device sc_dev;
volatile void *sc_regs;
int sc_adapter_type;
int sc_adapter_iv_am; /* int. vec + address modifier */
struct scsi_link sc_link;
};
static void ncr5380_minphys(struct buf *bp);
static int ncr5380_scsi_cmd(struct scsi_xfer *xs);
static int ncr5380_reset_adapter(struct ncr5380_softc *);
static int ncr5380_reset_scsibus(struct ncr5380_softc *);
static int ncr5380_poll(int adapter, int timeout);
static int ncr5380_send_cmd(struct scsi_xfer *xs);
static int ncr_intr(void *);
static int si_generic(int adapter, int id, int lun,
struct scsi_generic *cmd, int cmdlen,
void *databuf, int datalen);
static int si_group0(int adapter, int id, int lun,
int opcode, int addr, int len,
int flags, caddr_t databuf, int datalen);
static char scsi_name[] = "si";
struct scsi_adapter ncr5380_switch = {
ncr5380_scsi_cmd, /* scsi_cmd() */
ncr5380_minphys, /* scsi_minphys() */
NULL, /* open_target_lu() */
NULL, /* close_target_lu() */
};
/* This is copied from julian's bt driver */
/* "so we have a default dev struct for our link struct." */
struct scsi_device ncr_dev = {
NULL, /* Use default error handler. */
NULL, /* Use default start handler. */
NULL, /* Use default async handler. */
NULL, /* Use default "done" routine. */
};
static int si_match();
static void si_attach();
struct cfdriver sicd = {
NULL, "si", si_match, si_attach, DV_DULL,
sizeof(struct ncr5380_softc), NULL, 0,
};
static int
si_print(aux, name)
void *aux;
char *name;
{
}
static int
si_match(parent, vcf, args)
struct device *parent;
void *vcf, *args;
{
struct cfdata *cf = vcf;
struct confargs *ca = args;
int x, probe_addr;
/* Default interrupt priority always splbio==2 */
if (ca->ca_intpri == -1)
ca->ca_intpri = 2;
if ((cpu_machine_id == SUN3_MACH_50) ||
(cpu_machine_id == SUN3_MACH_60) )
{
/* Sun3/50 or Sun3/60 have only OBIO "si" */
if (ca->ca_bustype != BUS_OBIO)
return(0);
if (ca->ca_paddr == -1)
ca->ca_paddr = OBIO_NCR_SCSI;
/* OK... */
} else {
/* Other Sun3 models may have VME "si" or "sc" */
if (ca->ca_bustype != BUS_VME16)
return (0);
if (ca->ca_paddr == -1)
return (0);
/* OK... */
}
/* Make sure there is something there... */
x = bus_peek(ca->ca_bustype, ca->ca_paddr + 1, 1);
if (x == -1)
return (0);
/*
* If this is a VME SCSI board, we have to determine whether
* it is an "sc" (Sun2) or "si" (Sun3) SCSI board. This can
* be determined using the fact that the "sc" board occupies
* 4K bytes in VME space but the "si" board occupies 2K bytes.
*/
if (ca->ca_bustype == BUS_VME16) {
/* Note, the "si" board should NOT respond here. */
x = bus_peek(ca->ca_bustype, ca->ca_paddr + 0x801, 1);
if (x != -1)
return(0);
}
return (1);
}
static void
si_attach(parent, self, args)
struct device *parent, *self;
void *args;
{
struct ncr5380_softc *ncr5380 = (struct ncr5380_softc *) self;
volatile sci_regmap_t *regs;
struct confargs *ca = args;
switch (ca->ca_bustype) {
case BUS_OBIO:
regs = (sci_regmap_t *)
obio_alloc(ca->ca_paddr, sizeof(*regs));
isr_add_autovect(ncr_intr, (void *)ncr5380,
ca->ca_intpri);
break;
case BUS_VME16:
regs = (sci_regmap_t *)
bus_mapin(ca->ca_bustype, ca->ca_paddr, sizeof(*regs));
isr_add_vectored(ncr_intr, (void *)ncr5380,
ca->ca_intpri, ca->ca_intvec);
break;
default:
printf("unknown\n");
return;
}
ncr5380->sc_adapter_type = ca->ca_bustype;
ncr5380->sc_adapter_iv_am =
VME_SUPV_DATA_24 | (ca->ca_intvec & 0xFF);
ncr5380->sc_regs = regs;
/*
* fill in the prototype scsi_link.
*/
ncr5380->sc_link.adapter_softc = ncr5380;
ncr5380->sc_link.adapter_target = 7;
ncr5380->sc_link.adapter = &ncr5380_switch;
ncr5380->sc_link.device = &ncr_dev;
ncr5380->sc_link.openings = 2;
#ifdef DEBUG
ncr5380->sc_link.flags |= si_flags;
#endif
printf("\n");
ncr5380_reset_adapter(ncr5380);
ncr5380_reset_scsibus(ncr5380);
config_found(self, &(ncr5380->sc_link), si_print);
}
#define MIN_PHYS 65536 /*BARF!!!!*/
static void
ncr5380_minphys(struct buf *bp)
{
if (bp->b_bcount > MIN_PHYS) {
printf("Uh-oh... ncr5380_minphys setting bp->b_bcount = %x.\n", MIN_PHYS);
bp->b_bcount = MIN_PHYS;
}
}
#undef MIN_PHYS
static int
ncr5380_scsi_cmd(struct scsi_xfer *xs)
{
int flags, s, r;
flags = xs->flags;
if (xs->bp) flags |= (SCSI_NOSLEEP);
if ( flags & ITSDONE ) {
printf("Already done?");
xs->flags &= ~ITSDONE;
}
if ( ! ( flags & INUSE ) ) {
printf("Not in use?");
xs->flags |= INUSE;
}
s = splbio();
if ( flags & SCSI_RESET ) {
printf("flags & SCSIRESET.\n");
ncr5380_reset_scsibus(xs->sc_link->adapter_softc);
r = COMPLETE;
} else {
r = ncr5380_send_cmd(xs);
xs->flags |= ITSDONE;
scsi_done(xs);
}
splx(s);
switch(r) {
case COMPLETE:
case SUCCESSFULLY_QUEUED:
r = SUCCESSFULLY_QUEUED;
if (xs->flags & SCSI_POLL)
r = COMPLETE;
break;
default:
break;
}
return r;
}
#ifdef DEBUG
static int
ncr5380_show_scsi_cmd(struct scsi_xfer *xs)
{
u_char *b = (u_char *) xs->cmd;
int i = 0;
if ( ! ( xs->flags & SCSI_RESET ) ) {
printf("si(%d:%d:%d)-",
xs->sc_link->scsibus,
xs->sc_link->target,
xs->sc_link->lun);
while (i < xs->cmdlen) {
if (i) printf(",");
printf("%x",b[i++]);
}
printf("-\n");
} else {
printf("si(%d:%d:%d)-RESET-\n",
xs->sc_link->scsibus,
xs->sc_link->target,
xs->sc_link->lun);
}
}
#endif
/*
* Actual chip control.
*/
static void
ncr_sbc_intr(struct ncr5380_softc *ncr5380)
{
volatile sci_regmap_t *regs = ncr5380->sc_regs;
if ((regs->sci_csr & SCI_CSR_INT) == 0) {
#ifdef DEBUG
printf (" ncr_sbc_intr: spurrious\n");
#endif
return;
}
SCI_CLR_INTR(regs);
#ifdef DEBUG
printf (" ncr_sbc_intr\n");
#endif
}
static void
ncr_dma_intr(struct ncr5380_softc *ncr5380)
{
volatile struct si_regs *regs = ncr5380->sc_regs;
#ifdef DEBUG
printf (" ncr_dma_intr\n");
#endif
}
static int
ncr_intr(void *arg)
{
struct ncr5380_softc *ncr5380 = arg;
volatile struct si_regs *si = ncr5380->sc_regs;
int rv = 0;
/* Interrupts not enabled? Can not be for us. */
if ((si->si_csr & SI_CSR_INTR_EN) == 0)
return rv;
if (si->si_csr & SI_CSR_DMA_IP) {
ncr_dma_intr(ncr5380);
rv++;
}
if (si->si_csr & SI_CSR_SBC_IP) {
ncr_sbc_intr(ncr5380);
rv++;
}
return rv;
}
static int
ncr5380_reset_adapter(struct ncr5380_softc *sc)
{
volatile struct si_regs *si = sc->sc_regs;
#ifdef DEBUG
if (si_debug) {
printf("si_reset_adapter\n");
}
#endif
/* The reset bits in the CSR are active low. */
si->si_csr = 0;
delay(20);
si->si_csr = SI_CSR_FIFO_RES | SI_CSR_SCSI_RES;
si->fifo_count = 0;
if (sc->sc_adapter_type == BUS_VME16) {
si->dma_addrh = 0;
si->dma_addrl = 0;
si->dma_counth = 0;
si->dma_countl = 0;
si->iv_am = sc->sc_adapter_iv_am;
}
}
static int
ncr5380_reset_scsibus(struct ncr5380_softc *ncr5380)
{
volatile sci_regmap_t *regs = ncr5380->sc_regs;
#ifdef DEBUG
if (si_debug) {
printf("si_reset_scsibus\n");
}
#endif
regs->sci_icmd = SCI_ICMD_RST;
delay(100);
regs->sci_icmd = 0;
regs->sci_mode = 0;
regs->sci_tcmd = SCI_PHASE_DISC;
regs->sci_sel_enb = 0;
SCI_CLR_INTR(regs);
/* XXX - Need long delay here! */
}
static int
ncr5380_poll(int adapter, int timeout)
{
}
static int
ncr5380_send_cmd(struct scsi_xfer *xs)
{
int sense;
#ifdef DIAGNOSTIC
if ((getsr() & PSL_IPL) < PSL_IPL2)
panic("ncr_send_cmd: bad spl");
#endif
#ifdef DEBUG
if (si_debug & 2)
ncr5380_show_scsi_cmd(xs);
#endif
sense = si_generic( xs->sc_link->scsibus, xs->sc_link->target,
xs->sc_link->lun, xs->cmd, xs->cmdlen,
xs->data, xs->datalen );
switch (sense) {
case 0: /* success */
xs->resid = 0;
xs->error = XS_NOERROR;
break;
case 0x02: /* Check condition */
#ifdef DEBUG
if (si_debug)
printf("check cond. target %d.\n",
xs->sc_link->target);
#endif
delay(10); /* Phil's fix for slow devices. */
si_group0(xs->sc_link->scsibus,
xs->sc_link->target,
xs->sc_link->lun,
0x3, 0x0,
sizeof(struct scsi_sense_data),
0, (caddr_t) &(xs->sense),
sizeof(struct scsi_sense_data));
xs->error = XS_SENSE;
break;
case 0x08: /* Busy - common code will delay, retry. */
xs->error = XS_BUSY;
break;
default: /* Dead - tell common code to give up. */
xs->error = XS_DRIVER_STUFFUP;
break;
}
return (COMPLETE);
}
static int
si_select_target(register volatile sci_regmap_t *regs,
u_char myid, u_char tid, int with_atn)
{
register u_char bid, icmd;
int ret = SCSI_RET_RETRY;
int arb_retries, arb_wait;
/* for our purposes.. */
myid = 1 << myid;
tid = 1 << tid;
regs->sci_sel_enb = 0; /* we don't want any interrupts. */
regs->sci_tcmd = 0; /* get into a harmless state */
arb_retries = ARBITRATION_RETRIES;
retry_arbitration:
regs->sci_mode = 0; /* get into a harmless state */
if (--arb_retries <= 0) {
#ifdef DEBUG
if (si_debug) {
printf("si_select: arb_retries expended; resetting...\n");
}
#endif
ret = SCSI_RET_NEED_RESET;
goto nosel;
}
icmd = regs->sci_icmd & ~(SCI_ICMD_DIFF|SCI_ICMD_TEST);
if ((regs->sci_bus_csr & (SCI_BUS_BSY|SCI_BUS_SEL)) &&
(regs->sci_bus_csr & (SCI_BUS_BSY|SCI_BUS_SEL)) &&
(regs->sci_bus_csr & (SCI_BUS_BSY|SCI_BUS_SEL)))
{
/* Something is sitting on the SCSI bus... */
#ifdef DEBUG
if (si_debug) {
printf("si_select_target: still BSY+SEL; resetting...\n");
}
#endif
/* Send bus device reset. */
ret = SCSI_RET_NEED_RESET;
goto nosel;
}
regs->sci_odata = myid;
regs->sci_mode = SCI_MODE_ARB;
/* regs->sci_mode |= SCI_MODE_ARB; XXX? */
/* AIP might not set if BSY went true after we checked */
/* Wait up to about 100 usec. for it to appear. */
arb_wait = 50; /* X2 */
do {
if (regs->sci_icmd & SCI_ICMD_AIP)
goto got_aip;
delay2us();
} while (--arb_wait > 0);
/* XXX - Could have missed it? */
#ifdef DEBUG
if (si_debug)
printf("si_select_target: API did not appear\n");
#endif
goto retry_arbitration;
got_aip:
#ifdef DEBUG
if (si_debug & 4) {
printf("si_select_target: API after %d tries (last wait %d)\n",
ARBITRATION_RETRIES - arb_retries,
(50 - arb_wait));
}
#endif
delay(3); /* 2.2 uSec. arbitration delay */
if (regs->sci_icmd & SCI_ICMD_LST) {
#ifdef DEBUG
if (si_debug)
printf ("lost 1\n");
#endif
goto retry_arbitration; /* XXX */
}
regs->sci_mode &= ~SCI_MODE_PAR_CHK;
bid = regs->sci_data;
if ((bid & ~myid) > myid) {
#ifdef DEBUG
if (si_debug)
printf ("lost 2\n");
#endif
/* Trying again will not help. */
goto lost;
}
if (regs->sci_icmd & SCI_ICMD_LST) {
#ifdef DEBUG
if (si_debug)
printf ("lost 3\n");
#endif
goto lost;
}
/* Won arbitration, enter selection phase now */
icmd = regs->sci_icmd & ~(SCI_ICMD_DIFF|SCI_ICMD_TEST);
icmd |= (with_atn ? (SCI_ICMD_SEL|SCI_ICMD_ATN) : SCI_ICMD_SEL);
regs->sci_icmd = icmd;
if (regs->sci_icmd & SCI_ICMD_LST) {
#ifdef DEBUG
if (si_debug)
printf ("nosel\n");
#endif
goto nosel;
}
/* XXX a target that violates specs might still drive the bus XXX */
/* XXX should put our id out, and after the delay check nothi XXX */
/* XXX ng else is out there. XXX */
delay2us();
regs->sci_sel_enb = 0;
regs->sci_odata = myid | tid;
icmd |= SCI_ICMD_BSY|SCI_ICMD_DATA;
regs->sci_icmd = icmd;
/* regs->sci_mode &= ~SCI_MODE_ARB; 2 deskew delays, too */
regs->sci_mode = 0; /* 2 deskew delays, too */
icmd &= ~SCI_ICMD_BSY;
regs->sci_icmd = icmd;
/* bus settle delay, 400ns */
delay2us(); /* too much (was 2) ? */
regs->sci_mode |= SCI_MODE_PAR_CHK;
{
register int timeo = 2500;/* 250 msecs in 100 usecs chunks */
while ((regs->sci_bus_csr & SCI_BUS_BSY) == 0) {
if (--timeo > 0) {
delay(100);
} else {
/* This is the "normal" no-such-device select error. */
#ifdef DEBUG
if (si_debug)
printf("si_select: not BSY (nothing there)\n");
#endif
goto nodev;
}
}
}
icmd &= ~(SCI_ICMD_DATA|SCI_ICMD_SEL);
regs->sci_icmd = icmd;
/* regs->sci_sel_enb = myid;*/ /* looks like we should NOT have it */
/* XXX - SCI_MODE_PAR_CHK ? */
return SCSI_RET_SUCCESS;
nodev:
ret = SCSI_RET_DEVICE_DOWN;
regs->sci_sel_enb = myid;
nosel:
regs->sci_icmd = 0;
regs->sci_mode = 0;
return ret;
lost:
regs->sci_icmd = 0;
regs->sci_mode = 0;
#ifdef DEBUG
if (si_debug) {
printf("si_select: lost arbitration\n");
}
#endif
return ret;
}
sci_data_out(regs, phase, count, data)
register volatile sci_regmap_t *regs;
unsigned char *data;
{
register unsigned char icmd;
register int cnt=0;
/* ..checks.. */
icmd = regs->sci_icmd & ~(SCI_ICMD_DIFF|SCI_ICMD_TEST);
loop:
if (SCI_CUR_PHASE(regs->sci_bus_csr) != phase)
return cnt;
WAIT_FOR_REQ(regs);
icmd |= SCI_ICMD_DATA;
regs->sci_icmd = icmd;
regs->sci_odata = *data++;
icmd |= SCI_ICMD_ACK;
regs->sci_icmd = icmd;
icmd &= ~(SCI_ICMD_DATA|SCI_ICMD_ACK);
WAIT_FOR_NOT_REQ(regs);
regs->sci_icmd = icmd;
++cnt;
if (--count > 0)
goto loop;
scsi_timeout_error:
return cnt;
}
sci_data_in(regs, phase, count, data)
register volatile sci_regmap_t *regs;
unsigned char *data;
{
register unsigned char icmd;
register int cnt=0;
/* ..checks.. */
icmd = regs->sci_icmd & ~(SCI_ICMD_DIFF|SCI_ICMD_TEST);
loop:
if (SCI_CUR_PHASE(regs->sci_bus_csr) != phase)
return cnt;
WAIT_FOR_REQ(regs);
*data++ = regs->sci_data;
icmd |= SCI_ICMD_ACK;
regs->sci_icmd = icmd;
icmd &= ~SCI_ICMD_ACK;
WAIT_FOR_NOT_REQ(regs);
regs->sci_icmd = icmd;
++cnt;
if (--count > 0)
goto loop;
scsi_timeout_error:
return cnt;
}
/* Return -1 (error) or number of bytes sent (>=0). */
static int
si_command_transfer(register volatile sci_regmap_t *regs,
int maxlen, u_char *data, u_char *status, u_char *msg)
{
int xfer, phase;
xfer = 0;
regs->sci_icmd = 0;
while (1) {
WAIT_FOR_REQ(regs);
phase = SCI_CUR_PHASE(regs->sci_bus_csr);
switch (phase) {
case SCSI_PHASE_CMD:
SCI_ACK(regs,SCSI_PHASE_CMD);
xfer += sci_data_out(regs, SCSI_PHASE_CMD,
maxlen, data);
goto out;
case SCSI_PHASE_DATA_IN:
printf("command_transfer: Data in phase?\n");
goto err;
case SCSI_PHASE_DATA_OUT:
printf("command_transfer: Data out phase?\n");
goto err;
case SCSI_PHASE_STATUS:
SCI_ACK(regs,SCSI_PHASE_STATUS);
printf("command_transfer: status in...\n");
sci_data_in(regs, SCSI_PHASE_STATUS,
1, status);
printf("command_transfer: status=0x%x\n", *status);
goto err;
case SCSI_PHASE_MESSAGE_IN:
SCI_ACK(regs,SCSI_PHASE_MESSAGE_IN);
printf("command_transfer: msg in?\n");
sci_data_in(regs, SCSI_PHASE_MESSAGE_IN,
1, msg);
break;
case SCSI_PHASE_MESSAGE_OUT:
SCI_ACK(regs,SCSI_PHASE_MESSAGE_OUT);
sci_data_out(regs, SCSI_PHASE_MESSAGE_OUT,
1, msg);
break;
default:
printf("command_transfer: Unexpected phase 0x%x\n", phase);
goto err;
}
}
scsi_timeout_error:
err:
xfer = -1;
out:
return xfer;
}
static int
si_data_transfer(register volatile sci_regmap_t *regs,
int maxlen, u_char *data, u_char *status, u_char *msg)
{
int retlen = 0, xfer, phase;
regs->sci_icmd = 0;
*status = 0;
while (1) {
WAIT_FOR_REQ(regs);
phase = SCI_CUR_PHASE(regs->sci_bus_csr);
switch (phase) {
case SCSI_PHASE_CMD:
printf("Command phase in data_transfer().\n");
return retlen;
case SCSI_PHASE_DATA_IN:
SCI_ACK(regs,SCSI_PHASE_DATA_IN);
#if PSEUDO_DMA
xfer = sci_pdma_in(regs, SCSI_PHASE_DATA_IN,
maxlen, data);
#else
xfer = sci_data_in(regs, SCSI_PHASE_DATA_IN,
maxlen, data);
#endif
retlen += xfer;
maxlen -= xfer;
break;
case SCSI_PHASE_DATA_OUT:
SCI_ACK(regs,SCSI_PHASE_DATA_OUT);
#if PSEUDO_DMA
xfer = sci_pdma_out(regs, SCSI_PHASE_DATA_OUT,
maxlen, data);
#else
xfer = sci_data_out(regs, SCSI_PHASE_DATA_OUT,
maxlen, data);
#endif
retlen += xfer;
maxlen -= xfer;
break;
case SCSI_PHASE_STATUS:
SCI_ACK(regs,SCSI_PHASE_STATUS);
sci_data_in(regs, SCSI_PHASE_STATUS,
1, status);
break;
case SCSI_PHASE_MESSAGE_IN:
SCI_ACK(regs,SCSI_PHASE_MESSAGE_IN);
sci_data_in(regs, SCSI_PHASE_MESSAGE_IN,
1, msg);
if (*msg == 0) {
return retlen;
} else {
printf( "message 0x%x in "
"data_transfer.\n", *msg);
}
break;
case SCSI_PHASE_MESSAGE_OUT:
SCI_ACK(regs,SCSI_PHASE_MESSAGE_OUT);
sci_data_out(regs, SCSI_PHASE_MESSAGE_OUT,
1, msg);
break;
default:
printf( "Unexpected phase 0x%x in "
"data_transfer().\n", phase);
scsi_timeout_error:
return retlen;
break;
}
}
}
static int
si_dorequest(struct ncr5380_softc *sc,
int target, int lun, u_char *cmd, int cmdlen,
char *databuf, int datalen, int *sent)
/* Returns 0 on success, -1 on internal error, or the status byte */
{
register volatile sci_regmap_t *regs = sc->sc_regs;
int cmd_bytes_sent, r;
u_char stat, msg, c;
#ifdef DEBUG
if (si_debug) {
printf("si_dorequest: target=%d, lun=%d\n", target, lun);
}
#endif
*sent = 0;
if ( ( r = si_select_target(regs, 7, target, 1) ) != SCSI_RET_SUCCESS) {
#ifdef DEBUG
if (si_debug) {
printf("si_dorequest: select returned %d\n", r);
}
#endif
SCI_CLR_INTR(regs);
switch (r) {
case SCSI_RET_NEED_RESET:
printf("si_dorequest: target=%d, lun=%d, resetting...\n",
target, lun, r);
ncr5380_reset_adapter(sc);
ncr5380_reset_scsibus(sc);
/* fall through */
case SCSI_RET_RETRY:
return 0x08; /* Busy - tell common code to retry. */
default:
printf("si_dorequest: target=%d, lun=%d, error=%d.\n",
target, lun, r);
/* fall through */
case SCSI_RET_DEVICE_DOWN:
return -1; /* Dead - tell common code to give up. */
}
}
c = 0x80 | lun;
if ((cmd_bytes_sent = si_command_transfer(regs, cmdlen,
(u_char *) cmd, &stat, &c)) != cmdlen)
{
SCI_CLR_INTR(regs);
if (cmd_bytes_sent >= 0) {
printf("Data underrun sending CCB (%d bytes of %d, sent).\n",
cmd_bytes_sent, cmdlen);
}
return -1;
}
*sent = si_data_transfer(regs, datalen, (u_char *)databuf,
&stat, &msg);
#ifdef DEBUG
if (si_debug) {
printf("si_dorequest: data transfered = %d\n", *sent);
}
#endif
return stat;
}
static int
si_generic(int adapter, int id, int lun, struct scsi_generic *cmd,
int cmdlen, void *databuf, int datalen)
{
register struct ncr5380_softc *sc = sicd.cd_devs[adapter];
int i, j, sent;
if (cmd->opcode == TEST_UNIT_READY) /* XXX */
cmd->bytes[0] = ((u_char) lun << 5);
i = si_dorequest(sc, id, lun, (u_char *) cmd, cmdlen,
databuf, datalen, &sent);
return i;
}
static int
si_group0(int adapter, int id, int lun, int opcode, int addr, int len,
int flags, caddr_t databuf, int datalen)
{
register struct ncr5380_softc *sc = sicd.cd_devs[adapter];
unsigned char cmd[6];
int i, j, sent;
cmd[0] = opcode; /* Operation code */
cmd[1] = (lun << 5) | ((addr >> 16) & 0x1F); /* Lun & MSB of addr */
cmd[2] = (addr >> 8) & 0xFF; /* addr */
cmd[3] = addr & 0xFF; /* LSB of addr */
cmd[4] = len; /* Allocation length */
cmd[5] = flags; /* Link/Flag */
i = si_dorequest(sc, id, lun, cmd, 6, databuf, datalen, &sent);
return i;
}
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