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freebsd/sys/i386/isa/pas.c
Garrett Wollman 2f86936a07 Finished device configuration database work for all ISA devices (except `ze') 
and all SCSI devices (except that it's not done quite the way I want).  New
information added includes:

-	A text description of the device
-	A ``state''---unknown, unconfigured, idle, or busy
-	A generic parent device (with support in the m.i. code)
-	An interrupt mask type field (which will hopefully go away) so that
.	  ``doconfig'' can be written

This requires a new version of the `lsdev' program as well (next commit).
1994-10-23 21:28:03 +00:00

975 lines
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/*
* Copyright (C) 1994 Poul-Henning Kamp
*
* All rights reserved.
*
* This file contains some material which are covered by the message after
* this message.
*
* The rest of this file is covered by the following clause:
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@login.dkuug.dk> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
*
* $Id: pas.c,v 1.5 1994/10/18 03:53:12 phk Exp $
*
* This is a driver for the one particular kind of the "ProAudioSpectrum"
* card from MediaVision. To find out if your card is supported, you can
* either try out the driver, or you can look for a chip a little less than
* 1" square in one end of the card, with writing on it that say ...5380...
*
* Up to four of these cards can be in the same computer. If you have
* multiple cards, you need to set the "card-id" jumpers correspondingly.
*
* The driver uses no interrupts, so don't expect record-breaking performance.
*
* Poul-Henning Kamp <phk@freefall.cdrom.com>
*/
/*
* 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.
*
* Was: Id: pas.c,v 1.8.2.1 1994/07/11 00:02:32 cgd Exp
*
* Modified for use with the pc532 by Phil Nelson, Feb 94.
*/
#include "pas.h"
#if NPAS > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/devconf.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/ic/ncr_5380.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
/*
* Define this macro to disable the PSEUDO-DMA transfers.
*/
#undef NO_PAS16_PSEUDO_DMA
/*
* This parameter determines how many byte we "insb" between each check for
* a change of phase.
*/
#ifndef PAS16_PSEUDO_DMA_SIZE
# define PAS16_PSEUDO_DMA_SIZE 512
#endif
/*
* How many times we attempt to select a device.
*/
#ifndef ATTEMPT_SELECTION
# define ATTEMPT_SELECTION 5
#endif /* ATTEMPT_SELECTION */
/*
* How many microseconds between each attempt.
*/
#ifndef SELECTION_DELAY
# define SELECTION_DELAY 10000
#endif /* SELECTION_DELAY */
#ifndef PAS16_TIMEOUT
# define PAS16_TIMEOUT 1000000
#endif /* PAS16_TIMEOUT */
/* What we need to debug the driver */
#ifdef PAS_DEBUG
# if PAS_DEBUG == 0
# undef PAS_DEBUG
# else
static int pas_show_scsi_cmd(struct scsi_xfer *xs);
# ifndef PAS_DEBUG_REQUEST_SENSE
# define PAS_DEBUG_REQUEST_SENSE
# endif
# endif
#endif /* PAS_DEBUG */
#define SCSI_PHASE_DATA_OUT 0x0
#define SCSI_PHASE_DATA_IN 0x1
#define SCSI_PHASE_CMD 0x2
#define SCSI_PHASE_STATUS 0x3
#define SCSI_PHASE_UNSPEC1 0x4
#define SCSI_PHASE_UNSPEC2 0x5
#define SCSI_PHASE_MESSAGE_OUT 0x6
#define SCSI_PHASE_MESSAGE_IN 0x7
#define SCSI_CUR_PHASE(x) ((x>>2)&0x7)
#define SCSI_RET_SUCCESS 0
#define SCSI_RET_RETRY 1
#define SCSI_RET_DEVICE_DOWN 2
#define SCSI_RET_COMMAND_FAIL 3
/* Our per device (card) structure */
static
struct pas_softc {
struct scsi_link sc_link;
int mv_unit;
u_short iobase;
#define xor_0000 iobase
u_short xor_0001;
u_short xor_0002;
u_short xor_0003;
u_short xor_2000;
u_short xor_2001;
u_short xor_2002;
u_short xor_2003;
u_short xor_4000;
u_short xor_4001;
u_short xor_4003;
} s_pas[NPAS];
/*
* Register Access-macros use these
*/
#define r_csdr(ptr) (ptr->xor_0000)
#define w_odr(ptr) (ptr->xor_0000)
#define r_icr(ptr) (ptr->xor_0001)
#define w_icr(ptr) (ptr->xor_0001)
#define rw_mr(ptr) (ptr->xor_0002)
#define r_tcr(ptr) (ptr->xor_0003)
#define w_tcr(ptr) (ptr->xor_0003)
#define r_cscr(ptr) (ptr->xor_2000)
#define w_ser(ptr) (ptr->xor_2000)
#define r_bsr(ptr) (ptr->xor_2001)
#define w_sdsr(ptr) (ptr->xor_2001)
#define r_idr(ptr) (ptr->xor_2002)
#define w_sdtr(ptr) (ptr->xor_2002)
#define r_rpir(ptr) (ptr->xor_2003)
#define w_sdir(ptr) (ptr->xor_2003)
#define pas_data(ptr) (ptr->xor_4000)
#define pas_stat(ptr) (ptr->xor_4001)
#define R_PAS_STAT_DREQ 0x80
#define pas_irq(ptr) (ptr->xor_4003)
/*
* The actual macros used to access the chip
*/
#define P_PAS struct pas_softc *
#define R_PAS(ptr,foo) inb(foo(ptr))
#define W_PAS(ptr,foo,val) outb(foo(ptr),val)
#define M_PAS(ptr,foo,opr,arg) outb(foo(ptr),R_PAS(ptr,foo) opr arg)
#define WAIT_FOR_NOT_REQ(ptr) { \
int scsi_timeout = PAS16_TIMEOUT; \
while ( (R_PAS(ptr,r_cscr) & R_CSCR_REQ) && \
(R_PAS(ptr,r_cscr) & R_CSCR_REQ) && \
(R_PAS(ptr,r_cscr) & R_CSCR_REQ) && \
(--scsi_timeout) ); \
if (!scsi_timeout) { \
printf("scsi timeout--WAIT_FOR_NOT_REQ-- pas.c:%d.\n", __LINE__); \
goto scsi_timeout_error; \
} \
}
#define WAIT_FOR_REQ(ptr) { \
int scsi_timeout = PAS16_TIMEOUT; \
while ( ((R_PAS(ptr,r_cscr) & R_CSCR_REQ) == 0) && \
((R_PAS(ptr,r_cscr) & R_CSCR_REQ) == 0) && \
((R_PAS(ptr,r_cscr) & R_CSCR_REQ) == 0) && \
(--scsi_timeout) ); \
if (!scsi_timeout) { \
printf("scsi timeout--WAIT_FOR_REQ-- pas.c:%d.\n", __LINE__); \
goto scsi_timeout_error; \
} \
}
static u_int32 pas_adapter_info(int adapter_number);
static void pas_minphys(struct buf *bp);
static int32 pas_scsi_cmd(struct scsi_xfer *xs);
static int pas_reset(int);
static int pas_send_cmd(struct scsi_xfer *xs);
static int scsi_req(P_PAS,int,int,u_char *,int,
u_char *, int , int *, int *);
static int sci_data_out(P_PAS, int, int, u_char *);
static int sci_data_in(P_PAS, int, int, u_char *);
static int select_target(P_PAS, int);
extern int pasprobe(struct isa_device *dev);
extern int pasattach(struct isa_device *dev);
struct isa_driver pasdriver = { pasprobe, pasattach, "pas" };
static
struct scsi_adapter pas_adapter = {
pas_scsi_cmd, /* scsi_cmd() */
pas_minphys, /* scsi_minphys() */
0, /* open_target_lu() */
0, /* close_target_lu() */
pas_adapter_info, /* adapter_info() */
"pas", /* name */
{ 0, 0 } /* spare[2] */
};
static
struct scsi_device pas_dev = {
NULL, /* Use default error handler. */
NULL, /* have a queue, served by this (?) */
NULL, /* have no async handler. */
NULL, /* Use default "done" routine. */
"pas",
0,
{ 0, 0 }
};
static char *mv_type[] = {
0,0,0,0,0,0,"PAS+",0,0,0,0,0,"PAS16D",0,"CDPC","PAS16"};
int
pasprobe(struct isa_device *dev)
{
int port = dev->id_iobase;
int base = port - 0x1c00;
int unit = dev->id_unit;
int i, j;
if(base & 3) {
printf("pas%d cannot operate on address %x.", unit,port);
printf(" Address must be a multiple of four.\n");
return 0;
}
/* Tell the PAS16 we want to talk to, where to listen */
outb(0x9a01,0xbc + unit);
outb(0x9a01,base >> 2);
#ifdef PAS_DEBUG
printf("%x: 0x803=%x 0xec03=%x 0xff88=%x\n",
base,inb(base^0x803),inb(base^0xec03),inb(base^0xfc00));
#endif
/* Killer one */
i = inb(base ^ 0x803);
if(i == 0xff) return 0;
/* killer two */
if((0x03 & inb(base^0xec03)) != 0x03) return 0;
/* killer three */
for(i=0;i<4;i++) {
if(inb(port) != 0xff || inb(port^0x2000) != 0xff)
goto ok;
}
return 0;
ok:
/* killer four */
i = inb(base ^ 0x803);
outb(base^0x803,i ^ 0xe0);
j = inb(base^0x803);
outb(base^0x803,1);
if(i != j) return 0;
return 4;
}
static u_int32
pas_adapter_info(int adapter_number)
{
return 1;
}
static struct kern_devconf kdc_pas[NPAS] = { {
0, 0, 0, /* filled in by dev_attach */
"pas", 0, { MDDT_ISA, 0, "bio" },
isa_generic_externalize, 0, 0, ISA_EXTERNALLEN,
&kdc_isa0, /* parent */
0, /* parentdata */
DC_BUSY, /* host adapters are always busy */
"Media Vision ProAudioSpectrum SCSI host adapter"
} };
static inline void
pas_registerdev(struct isa_device *id)
{
if(id->id_unit)
kdc_pas[id->id_unit] = kdc_pas[0];
kdc_pas[id->id_unit].kdc_unit = id->id_unit;
kdc_pas[id->id_unit].kdc_parentdata = id;
dev_attach(&kdc_pas[id->id_unit]);
}
int
pasattach(struct isa_device *dev)
{
int i,base=dev->id_iobase-0x1c00;
struct pas_softc *ppas;
i = inb(base^0xEC03) & 0x0f;
printf("pas%d: Type = %d <%s>\n",dev->id_unit,i,mv_type[i]);
ppas = s_pas + dev->id_unit;
ppas->sc_link.adapter_unit = dev->id_unit;
ppas->sc_link.adapter_targ = 7;
ppas->sc_link.adapter = &pas_adapter;
ppas->sc_link.device = &pas_dev;
ppas->iobase=dev->id_iobase;
ppas->xor_0001 = ppas->iobase^0x0001;
ppas->xor_0002 = ppas->iobase^0x0002;
ppas->xor_0003 = ppas->iobase^0x0003;
ppas->xor_2000 = ppas->iobase^0x2000;
ppas->xor_2001 = ppas->iobase^0x2001;
ppas->xor_2002 = ppas->iobase^0x2002;
ppas->xor_2003 = ppas->iobase^0x2003;
ppas->xor_4000 = ppas->iobase^0x4000;
ppas->xor_4001 = ppas->iobase^0x4001;
ppas->xor_4003 = ppas->iobase^0x4003;
/* Various magic */
outb(base^0x4000,0x30);
outb(base^0x4001,0x01);
outb(base^0xbc00,0x01);
outb(base^0x8003,0x4d);
pas_registerdev(dev);
scsi_attachdevs(&(ppas->sc_link));
pas_reset(dev->id_unit);
return 1;
}
static void
pas_minphys(struct buf *bp)
{
#define MIN_PHYS 65536 /*BARF!!!!*/
if (bp->b_bcount > MIN_PHYS) {
printf("Uh-oh... pas_minphys setting bp->b_bcount = %x.\n", MIN_PHYS);
bp->b_bcount = MIN_PHYS;
}
#undef MIN_PHYS
}
static int32
pas_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;
}
if ( flags & SCSI_RESET ) {
printf("flags & SCSIRESET.\n");
if ( ! ( flags & SCSI_NOSLEEP ) ) {
s = splbio();
pas_reset(xs->sc_link->adapter_unit);
splx(s);
return(SUCCESSFULLY_QUEUED);
} else {
pas_reset(xs->sc_link->adapter_unit);
return (COMPLETE);
}
}
r = pas_send_cmd(xs);
xs->flags |= ITSDONE;
scsi_done(xs);
if (xs->flags&SCSI_NOMASK) {
return (r);
}
return SUCCESSFULLY_QUEUED;
}
#ifdef PAS_DEBUG
static int
pas_show_scsi_cmd(struct scsi_xfer *xs)
{
u_char *b = (u_char *) xs->cmd;
int i = 0;
if ( ! ( xs->flags & SCSI_RESET ) ) {
printf("pas(%d:%d:%d) ",
xs->sc_link->adapter_unit, xs->sc_link->target, xs->sc_link->lun);
printf("%d@%x, %d@%x <",xs->cmdlen,(u_long)xs->cmd,
xs->datalen,(u_long)xs->data);
while (i < xs->cmdlen) {
if (i) printf(",");
printf("%x",b[i++]);
}
printf(">\n");
} else {
printf("pas(%d:%d:%d)-RESET-\n",
xs->sc_link->adapter_unit, xs->sc_link->target,
xs->sc_link->lun);
}
return 0;
}
#endif /* PAS_DEBUG */
static int
pas_reset(int adapter)
{
struct pas_softc *ppas = s_pas + adapter;
/*
* Reset Hold Time is 25 uSec
*/
W_PAS(ppas,w_icr,W_ICR_ASSERT_RST);
DELAY(25);
W_PAS(ppas,w_icr,0);
W_PAS(ppas,rw_mr,0);
W_PAS(ppas,w_ser,0);
return 0;
}
static int
pas_send_cmd(struct scsi_xfer *xs)
{
P_PAS ptr = s_pas + xs->sc_link->adapter_unit;
int s,sent,ret;
int sense;
u_char cmd[6];
#ifdef PAS_DEBUG
pas_show_scsi_cmd(xs);
#endif /* PAS_DEBUG */
s = splbio();
sense = scsi_req(ptr,
xs->sc_link->target, xs->sc_link->lun,
(u_char*)xs->cmd, xs->cmdlen, xs->data, xs->datalen,
&sent, &ret);
splx(s);
switch (sense) {
case 0x00:
xs->error = XS_NOERROR;
xs->resid = sent;
return (COMPLETE);
case 0x02: /* Check condition */
#ifdef PAS_DEBUG_REQUEST_SENSE
printf("pas%d, target%d: sent=%d,ret=%d,sense=%x check. cond.\n",
xs->sc_link->adapter_unit, xs->sc_link->target,sent,ret,sense);
printf("Cmd:<%x",((u_char*)(xs->cmd))[0]);
for(sent=1;sent < sizeof xs->cmdlen;sent++) {
printf(",%x",((u_char*)(xs->cmd))[sent]);
}
printf(">\n");
#endif /* PAS_DEBUG_REQUEST_SENSE */
cmd[0] = 3;
cmd[1] = xs->sc_link->lun<<5;
cmd[2] = 0;
cmd[3] = 0;
cmd[4] = sizeof xs->sense;
cmd[5] = 0;
DELAY(10);
s = splbio();
scsi_req(ptr, xs->sc_link->target, xs->sc_link->lun,
cmd, sizeof cmd,
(caddr_t) &(xs->sense), sizeof xs->sense,
&sent, &ret);
splx(s);
#ifdef PAS_DEBUG_REQUEST_SENSE
printf("Sense result: (sent=%d, ret=%d)\n",sent,ret);
printf("<%x",((u_char*)(&xs->sense))[0]);
for(sent=1;sent < sizeof xs->sense;sent++) {
printf(",%x",((u_char*)(&xs->sense))[sent]);
}
printf(">\n");
#endif /* PAS_DEBUG_REQUEST_SENSE */
xs->error = XS_SENSE;
return HAD_ERROR;
case 0x08: /* Busy */
xs->error = XS_BUSY;
return HAD_ERROR;
default:
xs->error = XS_DRIVER_STUFFUP;
return HAD_ERROR;
}
}
/*
* Perform arbitration and selection. Figure 5-1, more or less.
*/
static int
select_target(P_PAS ptr, int tid)
{
int myid = ptr->sc_link.adapter_targ;
int ret = SCSI_RET_RETRY;
int tries = ATTEMPT_SELECTION;
int delay = SELECTION_DELAY;
int i;
/*
* Convert the ID's to bit-maps.
*/
myid = 1 << myid;
tid = 1 << tid;
/*
* Not documented, but clearly needed for now.
* XXX is this missing somewhere else, and this is just a hack ?
*/
loop:
W_PAS(ptr,w_tcr,0);
/*
* Write ID Bit to Output Register.
*/
W_PAS(ptr,w_odr,myid);
/*
* Set "ARBITRATE" Bit.
*/
W_PAS(ptr,rw_mr,RW_MR_ARBITRATE);
/*
* Check "Arbitration in progress" Bit.
*/
for (i = 0; i < 20; i++) /* 20usec circa */
if (R_PAS(ptr,r_icr) & R_ICR_ARBITRATION_IN_PROGRESS)
goto aip;
goto lost;
aip:
/*
* Wait 2.2 usec Arbitration Delay.
*/
DELAY(2);
/*
* Check "Lost Arbitration" Bit.
*/
if (R_PAS(ptr,r_icr) & R_ICR_LOST_ARBITRATION)
goto lost;
/*
* Higher priority ID present ?
*/
if ((R_PAS(ptr,r_csdr) & ~myid) > myid)
goto lost;
/*
* Check "Lost Arbitration" Bit.
*/
if (R_PAS(ptr,r_icr) & R_ICR_LOST_ARBITRATION)
goto lost;
/*
* Set "Assert SEL/".
*/
W_PAS(ptr,w_icr,W_ICR_ASSERT_SEL);
/*
* Check "Lost Arbitration" Bit.
*/
if (R_PAS(ptr,r_icr) & R_ICR_LOST_ARBITRATION) {
goto nosel;
}
/*
* Wait 1.2 usec minimum. (Bus Clear + Settle)
*/
DELAY(2);
/*
* Write Target and Initiator's ID bits to output Register.
*/
W_PAS(ptr,w_odr,myid|tid);
/*
* Set "Assert BSY/" + "Assert Data Bus".
*/
W_PAS(ptr,w_icr,
W_ICR_ASSERT_SEL | W_ICR_ASSERT_BSY | W_ICR_ASSERT_DATA_BUS);
/*
* Reset "ARBITRATE" Bit.
*/
W_PAS(ptr,rw_mr,0);
/*
* Reset "Select Enable" Register.
*/
W_PAS(ptr,w_ser,0);
/*
* Reset "Assert BSY/".
*/
W_PAS(ptr,w_icr,
W_ICR_ASSERT_SEL | W_ICR_ASSERT_DATA_BUS);
/*
* "BSY/" Asserted within 250 msec ?
*/
for(i=0;i<250000;i+=100) {
if (R_PAS(ptr,r_cscr) & R_CSCR_BSY)
goto resp;
DELAY(100);
}
goto nodev;
resp:
/*
* Reset "Assert SEL/" + "Assert Data Bus".
*/
W_PAS(ptr,w_icr,0);
return SCSI_RET_SUCCESS;
nodev:
ret = SCSI_RET_DEVICE_DOWN;
nosel:
W_PAS(ptr,w_icr,0);
lost:
W_PAS(ptr,rw_mr,0);
if(--tries) {
DELAY(delay);
goto loop;
}
return ret;
}
/*
* Figure 5-2.
*/
static int
sci_data_out(P_PAS ptr, int phase, int count, u_char *data)
{
register unsigned char icmd;
register int cnt=0,zonk;
if (SCSI_CUR_PHASE(R_PAS(ptr,r_cscr)) != phase)
return cnt;
icmd = R_PAS(ptr,r_icr) & RW_ICR_MASK;
#ifndef NO_PAS16_PSEUDO_DMA
/*
* The PAS16 has special provisions for doing pseudo-dma.
*/
/*
* Don't use pseudo-dma unless we need much data. This way we avoid all
* the variable length stuff entirely.
*
* XXX something screws up for big transfers :-(
*/
if(count >= 128 && count <= 8192) {
M_PAS(ptr,rw_mr,|,RW_MR_DMA_MODE);
W_PAS(ptr,w_icr,icmd | W_ICR_ASSERT_DATA_BUS);
W_PAS(ptr,w_sdsr,0);
while(count >= PAS16_PSEUDO_DMA_SIZE) {
zonk=0;
while(!(R_PAS(ptr,pas_stat) & R_PAS_STAT_DREQ))
if (++zonk > 1000 || SCSI_CUR_PHASE(R_PAS(ptr,r_cscr)) != phase)
return cnt;
outsb(pas_data(ptr),data,PAS16_PSEUDO_DMA_SIZE);
data += PAS16_PSEUDO_DMA_SIZE;
cnt += PAS16_PSEUDO_DMA_SIZE;
count -= PAS16_PSEUDO_DMA_SIZE;
}
if(count) {
while(!(R_PAS(ptr,pas_stat) & R_PAS_STAT_DREQ))
if (SCSI_CUR_PHASE(R_PAS(ptr,r_cscr)) != phase)
return cnt;
outsb(pas_data(ptr),data,count);
cnt += count;
data += count;
}
M_PAS(ptr,rw_mr,&,~RW_MR_DMA_MODE);
W_PAS(ptr,w_icr,icmd);
return cnt;
}
#endif /* NO_PAS16_PSEUDO_DMA */
loop:
if (SCSI_CUR_PHASE(R_PAS(ptr,r_cscr)) != phase)
return cnt;
W_PAS(ptr,w_odr, *data);
WAIT_FOR_REQ(ptr);
icmd |= W_ICR_ASSERT_DATA_BUS;
W_PAS(ptr,w_icr,icmd);
icmd |= W_ICR_ASSERT_ACK;
W_PAS(ptr,w_icr,icmd);
icmd &= ~(W_ICR_ASSERT_DATA_BUS|W_ICR_ASSERT_ACK);
WAIT_FOR_NOT_REQ(ptr);
W_PAS(ptr,w_icr,icmd);
++cnt;
data++;
if (--count > 0)
goto loop;
scsi_timeout_error:
return cnt;
}
static int
sci_data_in(P_PAS ptr, int phase, int count, u_char *data)
{
unsigned char icmd;
int cnt=0;
if (SCSI_CUR_PHASE(R_PAS(ptr,r_cscr)) != phase)
return cnt;
#ifndef NO_PAS16_PSEUDO_DMA
/*
* The PAS16 has special provisions for doing pseudo-dma.
*/
/*
* Don't use pseudo-dma unless we need much data. This way we avoid all
* the variable length stuff entirely.
*/
if(count >= 128) {
M_PAS(ptr,rw_mr,|,RW_MR_DMA_MODE);
W_PAS(ptr,w_sdir,0);
while(count > PAS16_PSEUDO_DMA_SIZE) {
while(!(R_PAS(ptr,pas_stat) & R_PAS_STAT_DREQ)) ;
insb(pas_data(ptr),data,PAS16_PSEUDO_DMA_SIZE);
data += PAS16_PSEUDO_DMA_SIZE;
cnt += PAS16_PSEUDO_DMA_SIZE;
count -= PAS16_PSEUDO_DMA_SIZE;
if (SCSI_CUR_PHASE(R_PAS(ptr,r_cscr)) != phase)
return cnt;
}
while(!(R_PAS(ptr,pas_stat) & R_PAS_STAT_DREQ)) ;
insb(pas_data(ptr),data,count-1);
cnt += count-1;
data += count-1;
while(!(R_PAS(ptr,pas_stat) & R_PAS_STAT_DREQ)) ;
while((R_PAS(ptr,r_cscr) & R_CSCR_REQ));
*data = R_PAS(ptr,r_idr);
cnt++;
M_PAS(ptr,rw_mr,&,~RW_MR_DMA_MODE);
return cnt;
}
#endif /* NO_PAS16_PSEUDO_DMA */
icmd = R_PAS(ptr,r_icr) & RW_ICR_MASK;
loop:
if (SCSI_CUR_PHASE(R_PAS(ptr,r_cscr)) != phase)
return cnt;
WAIT_FOR_REQ(ptr);
*data++ = R_PAS(ptr,r_csdr);
icmd |= W_ICR_ASSERT_ACK;
W_PAS(ptr,w_icr,icmd);
icmd &= ~W_ICR_ASSERT_ACK;
WAIT_FOR_NOT_REQ(ptr);
W_PAS(ptr,w_icr,icmd);
++cnt;
if (--count > 0)
goto loop;
scsi_timeout_error:
return cnt;
}
static int
cmd_xfer(P_PAS ptr, int maxlen, u_char *data, u_char *status, u_char *msg)
{
int xfer=0, phase;
W_PAS(ptr,w_icr,0);
while (1) {
WAIT_FOR_REQ(ptr);
phase = SCSI_CUR_PHASE(R_PAS(ptr,r_cscr));
switch (phase) {
case SCSI_PHASE_CMD:
W_PAS(ptr,w_tcr,SCSI_PHASE_CMD);
xfer += sci_data_out(ptr, SCSI_PHASE_CMD, maxlen, data);
return xfer;
case SCSI_PHASE_DATA_IN:
printf("Data in phase in cmd_xfer?\n");
return 0;
case SCSI_PHASE_DATA_OUT:
printf("Data out phase in cmd_xfer?\n");
return 0;
case SCSI_PHASE_STATUS:
W_PAS(ptr,w_tcr,SCSI_PHASE_STATUS);
printf("status in cmd_xfer.\n");
sci_data_in(ptr, SCSI_PHASE_STATUS, 1, status);
break;
case SCSI_PHASE_MESSAGE_IN:
W_PAS(ptr,w_tcr,SCSI_PHASE_MESSAGE_IN);
printf("msgin in cmd_xfer.\n");
sci_data_in(ptr, SCSI_PHASE_MESSAGE_IN, 1, msg);
break;
case SCSI_PHASE_MESSAGE_OUT:
W_PAS(ptr,w_tcr,SCSI_PHASE_MESSAGE_OUT);
sci_data_out(ptr, SCSI_PHASE_MESSAGE_OUT, 1, msg);
break;
default:
printf("Unexpected phase 0x%x in cmd_xfer()\n", phase);
scsi_timeout_error:
return xfer;
break;
}
}
}
static int
data_xfer(P_PAS ptr, int maxlen, u_char *data, u_char *status, u_char *msg)
{
int retlen = 0, xfer, phase;
W_PAS(ptr,w_icr,0);
*status = 0;
while (1) {
WAIT_FOR_REQ(ptr);
phase = SCSI_CUR_PHASE(R_PAS(ptr,r_cscr));
switch (phase) {
case SCSI_PHASE_CMD:
printf("Command phase in data_xfer().\n");
return retlen;
case SCSI_PHASE_DATA_IN:
W_PAS(ptr,w_tcr,SCSI_PHASE_DATA_IN);
xfer = sci_data_in (ptr, SCSI_PHASE_DATA_IN, maxlen, data);
retlen += xfer;
maxlen -= xfer;
break;
case SCSI_PHASE_DATA_OUT:
W_PAS(ptr,w_tcr,SCSI_PHASE_DATA_OUT);
xfer = sci_data_out (ptr, SCSI_PHASE_DATA_OUT, maxlen, data);
retlen += xfer;
maxlen -= xfer;
break;
case SCSI_PHASE_STATUS:
W_PAS(ptr,w_tcr,SCSI_PHASE_STATUS);
sci_data_in(ptr, SCSI_PHASE_STATUS, 1, status);
break;
case SCSI_PHASE_MESSAGE_IN:
W_PAS(ptr,w_tcr,SCSI_PHASE_MESSAGE_IN);
sci_data_in(ptr, SCSI_PHASE_MESSAGE_IN, 1, msg);
if (*msg == 0) {
return retlen;
} else {
printf( "message 0x%x in data_xfer.\n", *msg);
}
break;
case SCSI_PHASE_MESSAGE_OUT:
W_PAS(ptr,w_tcr,SCSI_PHASE_MESSAGE_OUT);
sci_data_out(ptr, SCSI_PHASE_MESSAGE_OUT, 1, msg);
break;
default:
printf( "Unexpected phase 0x%x in data_xfer().\n",
phase);
scsi_timeout_error:
return retlen;
break;
}
}
}
static int
scsi_req(P_PAS ptr, int target, int lun, u_char *cmd, int cmdlen,
u_char *databuf, int datalen, int *sent, int *ret)
{
/* Returns 0 on success, -1 on internal error, or the status byte */
int cmd_bytes_sent, r;
u_char stat, msg, c;
*sent = 0;
if ( ( r = select_target(ptr, target) ) != SCSI_RET_SUCCESS) {
*ret = r;
switch (r) {
case SCSI_RET_RETRY:
return 0x08;
default:
printf("select_target(target %d, lun %d) failed(%d).\n",
target, lun, r);
case SCSI_RET_DEVICE_DOWN:
return -1;
}
}
c = 0x80 | lun;
if ((cmd_bytes_sent = cmd_xfer(ptr, cmdlen, cmd, &stat, &c)) != cmdlen) {
*ret = SCSI_RET_COMMAND_FAIL;
printf("Data underrun sending CCB (%d bytes of %d, sent).\n",
cmd_bytes_sent, cmdlen);
return -1;
}
*sent=data_xfer(ptr, datalen, databuf, &stat, &msg);
*ret = 0;
return stat;
}
#endif /* NPAS */
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