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NetBSD/sys/dev/scsipi/atapi_wdc.c

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/* $NetBSD: atapi_wdc.c,v 1.25 1999/08/09 09:49:48 bouyer Exp $ */
/*
* Copyright (c) 1998 Manuel Bouyer.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
*/
#ifndef WDCDEBUG
#define WDCDEBUG
#endif /* WDCDEBUG */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/syslog.h>
#include <sys/proc.h>
#include <vm/vm.h>
#include <machine/intr.h>
#include <machine/bus.h>
#ifndef __BUS_SPACE_HAS_STREAM_METHODS
#define bus_space_write_multi_stream_2 bus_space_write_multi_2
#define bus_space_write_multi_stream_4 bus_space_write_multi_4
#define bus_space_read_multi_stream_2 bus_space_read_multi_2
#define bus_space_read_multi_stream_4 bus_space_read_multi_4
#endif /* __BUS_SPACE_HAS_STREAM_METHODS */
#include <dev/ata/atareg.h>
#include <dev/ata/atavar.h>
#include <dev/ic/wdcreg.h>
#include <dev/ic/wdcvar.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsipiconf.h>
#include <dev/scsipi/atapiconf.h>
#define DEBUG_INTR 0x01
#define DEBUG_XFERS 0x02
#define DEBUG_STATUS 0x04
#define DEBUG_FUNCS 0x08
#define DEBUG_PROBE 0x10
#ifdef WDCDEBUG
int wdcdebug_atapi_mask = 0;
#define WDCDEBUG_PRINT(args, level) \
if (wdcdebug_atapi_mask & (level)) \
printf args
#else
#define WDCDEBUG_PRINT(args, level)
#endif
#define ATAPI_DELAY 10 /* 10 ms, this is used only before sending a cmd */
void wdc_atapi_minphys __P((struct buf *bp));
void wdc_atapi_start __P((struct channel_softc *,struct wdc_xfer *));
int wdc_atapi_intr __P((struct channel_softc *, struct wdc_xfer *, int));
int wdc_atapi_ctrl __P((struct channel_softc *, struct wdc_xfer *, int));
void wdc_atapi_done __P((struct channel_softc *, struct wdc_xfer *));
void wdc_atapi_reset __P((struct channel_softc *, struct wdc_xfer *));
int wdc_atapi_send_cmd __P((struct scsipi_xfer *sc_xfer));
#define MAX_SIZE MAXPHYS
void
wdc_atapibus_attach(chp)
struct channel_softc *chp;
{
struct wdc_softc *wdc = chp->wdc;
int channel = chp->channel;
struct ata_atapi_attach aa_link;
/*
* Fill in the adapter.
*/
wdc->sc_atapi_adapter.scsipi_cmd = wdc_atapi_send_cmd;
wdc->sc_atapi_adapter.scsipi_minphys = wdc_atapi_minphys;
memset(&aa_link, 0, sizeof(struct ata_atapi_attach));
aa_link.aa_type = T_ATAPI;
aa_link.aa_channel = channel;
aa_link.aa_openings = 1;
aa_link.aa_drv_data = chp->ch_drive; /* pass the whole array */
aa_link.aa_bus_private = &wdc->sc_atapi_adapter;
(void)config_found(&wdc->sc_dev, (void *)&aa_link, atapi_print);
}
void
wdc_atapi_minphys (struct buf *bp)
{
if(bp->b_bcount > MAX_SIZE)
bp->b_bcount = MAX_SIZE;
minphys(bp);
}
int
wdc_atapi_get_params(ab_link, drive, flags, id)
struct scsipi_link *ab_link;
u_int8_t drive;
int flags;
struct ataparams *id;
{
struct wdc_softc *wdc = (void*)ab_link->adapter_softc;
struct channel_softc *chp =
wdc->channels[ab_link->scsipi_atapi.channel];
struct wdc_command wdc_c;
/* if no ATAPI device detected at wdc attach time, skip */
/*
* XXX this will break scsireprobe if this is of any interest for
* ATAPI devices one day.
*/
if ((chp->ch_drive[drive].drive_flags & DRIVE_ATAPI) == 0) {
WDCDEBUG_PRINT(("wdc_atapi_get_params: drive %d not present\n",
drive), DEBUG_PROBE);
return -1;
}
memset(&wdc_c, 0, sizeof(struct wdc_command));
wdc_c.r_command = ATAPI_SOFT_RESET;
wdc_c.r_st_bmask = 0;
wdc_c.r_st_pmask = 0;
wdc_c.flags = AT_POLL;
wdc_c.timeout = WDC_RESET_WAIT;
if (wdc_exec_command(&chp->ch_drive[drive], &wdc_c) != WDC_COMPLETE) {
printf("wdc_atapi_get_params: ATAPI_SOFT_RESET failed for"
" drive %s:%d:%d: driver failed\n",
chp->wdc->sc_dev.dv_xname, chp->channel, drive);
panic("wdc_atapi_get_params");
}
if (wdc_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) {
WDCDEBUG_PRINT(("wdc_atapi_get_params: ATAPI_SOFT_RESET "
"failed for drive %s:%d:%d: error 0x%x\n",
chp->wdc->sc_dev.dv_xname, chp->channel, drive,
wdc_c.r_error), DEBUG_PROBE);
return -1;
}
chp->ch_drive[drive].state = 0;
bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_status);
/* Some ATAPI devices need a bit more time after software reset. */
delay(5000);
if (ata_get_params(&chp->ch_drive[drive], AT_POLL, id) != 0) {
WDCDEBUG_PRINT(("wdc_atapi_get_params: ATAPI_IDENTIFY_DEVICE "
"failed for drive %s:%d:%d: error 0x%x\n",
chp->wdc->sc_dev.dv_xname, chp->channel, drive,
wdc_c.r_error), DEBUG_PROBE);
return -1;
}
return COMPLETE;
}
int
wdc_atapi_send_cmd(sc_xfer)
struct scsipi_xfer *sc_xfer;
{
struct wdc_softc *wdc = (void*)sc_xfer->sc_link->adapter_softc;
struct wdc_xfer *xfer;
int flags = sc_xfer->flags;
int channel = sc_xfer->sc_link->scsipi_atapi.channel;
int drive = sc_xfer->sc_link->scsipi_atapi.drive;
int s, ret;
WDCDEBUG_PRINT(("wdc_atapi_send_cmd %s:%d:%d\n",
wdc->sc_dev.dv_xname, channel, drive), DEBUG_XFERS);
xfer = wdc_get_xfer(flags & SCSI_NOSLEEP ? WDC_NOSLEEP : WDC_CANSLEEP);
if (xfer == NULL) {
return TRY_AGAIN_LATER;
}
if (sc_xfer->flags & SCSI_POLL)
xfer->c_flags |= C_POLL;
xfer->drive = drive;
xfer->c_flags |= C_ATAPI;
xfer->cmd = sc_xfer;
xfer->databuf = sc_xfer->data;
xfer->c_bcount = sc_xfer->datalen;
xfer->c_start = wdc_atapi_start;
xfer->c_intr = wdc_atapi_intr;
s = splbio();
wdc_exec_xfer(wdc->channels[channel], xfer);
#ifdef DIAGNOSTIC
if ((sc_xfer->flags & SCSI_POLL) != 0 &&
(sc_xfer->flags & ITSDONE) == 0)
panic("wdc_atapi_send_cmd: polled command not done");
#endif
ret = (sc_xfer->flags & ITSDONE) ? COMPLETE : SUCCESSFULLY_QUEUED;
splx(s);
return ret;
}
void
wdc_atapi_start(chp, xfer)
struct channel_softc *chp;
struct wdc_xfer *xfer;
{
struct scsipi_xfer *sc_xfer = xfer->cmd;
struct ata_drive_datas *drvp = &chp->ch_drive[xfer->drive];
WDCDEBUG_PRINT(("wdc_atapi_start %s:%d:%d, scsi flags 0x%x \n",
chp->wdc->sc_dev.dv_xname, chp->channel, drvp->drive,
sc_xfer->flags), DEBUG_XFERS);
/* Adjust C_DMA, it may have changed if we are requesting sense */
if ((drvp->drive_flags & (DRIVE_DMA | DRIVE_UDMA)) &&
(sc_xfer->datalen > 0 || (xfer->c_flags & C_SENSE)))
xfer->c_flags |= C_DMA;
else
xfer->c_flags &= ~C_DMA;
/* start timeout machinery */
if ((sc_xfer->flags & SCSI_POLL) == 0)
timeout(wdctimeout, chp, sc_xfer->timeout * hz / 1000);
/* Do control operations specially. */
if (drvp->state < READY) {
if (drvp->state != PIOMODE) {
printf("%s:%d:%d: bad state %d in wdc_atapi_start\n",
chp->wdc->sc_dev.dv_xname, chp->channel,
xfer->drive, drvp->state);
panic("wdc_atapi_start: bad state");
}
wdc_atapi_ctrl(chp, xfer, 0);
return;
}
bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh,
WDSD_IBM | (xfer->drive << 4));
if (wait_for_unbusy(chp, ATAPI_DELAY) < 0) {
printf("wdc_atapi_start: not ready, st = %02x\n",
chp->ch_status);
sc_xfer->error = XS_TIMEOUT;
wdc_atapi_reset(chp, xfer);
return;
}
/*
* Even with WDCS_ERR, the device should accept a command packet
* Limit length to what can be stuffed into the cylinder register
* (16 bits). Some CD-ROMs seem to interpret '0' as 65536,
* but not all devices do that and it's not obvious from the
* ATAPI spec that that behaviour should be expected. If more
* data is necessary, multiple data transfer phases will be done.
*/
wdccommand(chp, xfer->drive, ATAPI_PKT_CMD,
sc_xfer->datalen <= 0xffff ? sc_xfer->datalen : 0xffff,
0, 0, 0,
(xfer->c_flags & C_DMA) ? ATAPI_PKT_CMD_FTRE_DMA : 0);
/*
* If there is no interrupt for CMD input, busy-wait for it (done in
* the interrupt routine. If it is a polled command, call the interrupt
* routine until command is done.
*/
if ((sc_xfer->sc_link->scsipi_atapi.cap & ATAPI_CFG_DRQ_MASK) !=
ATAPI_CFG_IRQ_DRQ || (sc_xfer->flags & SCSI_POLL)) {
/* Wait for at last 400ns for status bit to be valid */
DELAY(1);
wdc_atapi_intr(chp, xfer, 0);
} else {
chp->ch_flags |= WDCF_IRQ_WAIT;
}
if (sc_xfer->flags & SCSI_POLL) {
while ((sc_xfer->flags & ITSDONE) == 0) {
/* Wait for at last 400ns for status bit to be valid */
DELAY(1);
wdc_atapi_intr(chp, xfer, 0);
}
}
}
int
wdc_atapi_intr(chp, xfer, irq)
struct channel_softc *chp;
struct wdc_xfer *xfer;
int irq;
{
struct scsipi_xfer *sc_xfer = xfer->cmd;
struct ata_drive_datas *drvp = &chp->ch_drive[xfer->drive];
int len, phase, i, retries=0;
int ire, dma_err = 0;
int dma_flags = 0;
struct scsipi_generic _cmd_reqsense;
struct scsipi_sense *cmd_reqsense =
(struct scsipi_sense *)&_cmd_reqsense;
void *cmd;
WDCDEBUG_PRINT(("wdc_atapi_intr %s:%d:%d\n",
chp->wdc->sc_dev.dv_xname, chp->channel, drvp->drive), DEBUG_INTR);
/* Is it not a transfer, but a control operation? */
if (drvp->state < READY) {
printf("%s:%d:%d: bad state %d in wdc_atapi_intr\n",
chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive,
drvp->state);
panic("wdc_atapi_intr: bad state\n");
}
/*
* If we missed an interrupt in a PIO transfer, reset and restart.
* Don't try to continue transfer, we may have missed cycles.
*/
if ((xfer->c_flags & (C_TIMEOU | C_DMA)) == C_TIMEOU) {
sc_xfer->error = XS_TIMEOUT;
wdc_atapi_reset(chp, xfer);
return 1;
}
/* Ack interrupt done in wait_for_unbusy */
bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh,
WDSD_IBM | (xfer->drive << 4));
if (wait_for_unbusy(chp,
(irq == 0) ? sc_xfer->timeout : 0) != 0) {
if (irq && (xfer->c_flags & C_TIMEOU) == 0)
return 0; /* IRQ was not for us */
printf("%s:%d:%d: device timeout, c_bcount=%d, c_skip=%d\n",
chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive,
xfer->c_bcount, xfer->c_skip);
if (xfer->c_flags & C_DMA)
drvp->n_dmaerrs++;
sc_xfer->error = XS_TIMEOUT;
wdc_atapi_reset(chp, xfer);
return 1;
}
/* If we missed an IRQ and were using DMA, flag it as a DMA error */
if ((xfer->c_flags & C_TIMEOU) && (xfer->c_flags & C_DMA))
drvp->n_dmaerrs++;
/*
* if the request sense command was aborted, report the short sense
* previously recorded, else continue normal processing
*/
if ((xfer->c_flags & C_SENSE) != 0 &&
(chp->ch_status & WDCS_ERR) != 0 &&
(chp->ch_error & WDCE_ABRT) != 0) {
WDCDEBUG_PRINT(("wdc_atapi_intr: request_sense aborted, "
"calling wdc_atapi_done(), sense 0x%x\n",
sc_xfer->sense.atapi_sense), DEBUG_INTR);
wdc_atapi_done(chp, xfer);
return 1;
}
if (xfer->c_flags & C_DMA) {
dma_flags = ((sc_xfer->flags & SCSI_DATA_IN) ||
(xfer->c_flags & C_SENSE)) ? WDC_DMA_READ : 0;
dma_flags |= sc_xfer->flags & SCSI_POLL ? WDC_DMA_POLL : 0;
}
again:
len = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_cyl_lo) +
256 * bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_cyl_hi);
ire = bus_space_read_1(chp->cmd_iot, chp->cmd_ioh, wd_ireason);
phase = (ire & (WDCI_CMD | WDCI_IN)) | (chp->ch_status & WDCS_DRQ);
WDCDEBUG_PRINT(("wdc_atapi_intr: c_bcount %d len %d st 0x%x err 0x%x "
"ire 0x%x :", xfer->c_bcount,
len, chp->ch_status, chp->ch_error, ire), DEBUG_INTR);
switch (phase) {
case PHASE_CMDOUT:
if (xfer->c_flags & C_SENSE) {
memset(cmd_reqsense, 0, sizeof(struct scsipi_generic));
cmd_reqsense->opcode = REQUEST_SENSE;
cmd_reqsense->length = xfer->c_bcount;
cmd = cmd_reqsense;
} else {
cmd = sc_xfer->cmd;
}
WDCDEBUG_PRINT(("PHASE_CMDOUT\n"), DEBUG_INTR);
/* Init the DMA channel if necessary */
if (xfer->c_flags & C_DMA) {
if ((*chp->wdc->dma_init)(chp->wdc->dma_arg,
chp->channel, xfer->drive,
xfer->databuf, xfer->c_bcount, dma_flags) != 0) {
sc_xfer->error = XS_DRIVER_STUFFUP;
break;
}
}
/* send packet command */
/* Commands are 12 or 16 bytes long. It's 32-bit aligned */
if ((chp->wdc->cap & WDC_CAPABILITY_ATAPI_NOSTREAM)) {
if (drvp->drive_flags & DRIVE_CAP32) {
bus_space_write_multi_4(chp->data32iot,
chp->data32ioh, 0,
(u_int32_t *)cmd,
sc_xfer->cmdlen >> 2);
} else {
bus_space_write_multi_2(chp->cmd_iot,
chp->cmd_ioh, wd_data,
(u_int16_t *)cmd,
sc_xfer->cmdlen >> 1);
}
} else {
if (drvp->drive_flags & DRIVE_CAP32) {
bus_space_write_multi_stream_4(chp->data32iot,
chp->data32ioh, 0,
(u_int32_t *)cmd,
sc_xfer->cmdlen >> 2);
} else {
bus_space_write_multi_stream_2(chp->cmd_iot,
chp->cmd_ioh, wd_data,
(u_int16_t *)cmd,
sc_xfer->cmdlen >> 1);
}
}
/* Start the DMA channel if necessary */
if (xfer->c_flags & C_DMA) {
(*chp->wdc->dma_start)(chp->wdc->dma_arg,
chp->channel, xfer->drive, dma_flags);
}
if ((sc_xfer->flags & SCSI_POLL) == 0) {
chp->ch_flags |= WDCF_IRQ_WAIT;
}
return 1;
case PHASE_DATAOUT:
/* write data */
WDCDEBUG_PRINT(("PHASE_DATAOUT\n"), DEBUG_INTR);
if ((sc_xfer->flags & SCSI_DATA_OUT) == 0 ||
(xfer->c_flags & C_DMA) != 0) {
printf("wdc_atapi_intr: bad data phase DATAOUT\n");
if (xfer->c_flags & C_DMA) {
(*chp->wdc->dma_finish)(chp->wdc->dma_arg,
chp->channel, xfer->drive, dma_flags);
drvp->n_dmaerrs++;
}
sc_xfer->error = XS_TIMEOUT;
wdc_atapi_reset(chp, xfer);
return 1;
}
if (xfer->c_bcount < len) {
printf("wdc_atapi_intr: warning: write only "
"%d of %d requested bytes\n", xfer->c_bcount, len);
if ((chp->wdc->cap & WDC_CAPABILITY_ATAPI_NOSTREAM)) {
bus_space_write_multi_2(chp->cmd_iot,
chp->cmd_ioh, wd_data,
(u_int16_t *)((char *)xfer->databuf +
xfer->c_skip),
xfer->c_bcount >> 1);
} else {
bus_space_write_multi_stream_2(chp->cmd_iot,
chp->cmd_ioh, wd_data,
(u_int16_t *)((char *)xfer->databuf +
xfer->c_skip),
xfer->c_bcount >> 1);
}
for (i = xfer->c_bcount; i < len; i += 2)
bus_space_write_2(chp->cmd_iot, chp->cmd_ioh,
wd_data, 0);
xfer->c_skip += xfer->c_bcount;
xfer->c_bcount = 0;
} else {
if (drvp->drive_flags & DRIVE_CAP32) {
if ((chp->wdc->cap & WDC_CAPABILITY_ATAPI_NOSTREAM))
bus_space_write_multi_4(chp->data32iot,
chp->data32ioh, 0,
(u_int32_t *)((char *)xfer->databuf +
xfer->c_skip),
len >> 2);
else
bus_space_write_multi_stream_4(chp->data32iot,
chp->data32ioh, wd_data,
(u_int32_t *)((char *)xfer->databuf +
xfer->c_skip),
len >> 2);
xfer->c_skip += len & 0xfffffffc;
xfer->c_bcount -= len & 0xfffffffc;
len = len & 0x03;
}
if (len > 0) {
if ((chp->wdc->cap & WDC_CAPABILITY_ATAPI_NOSTREAM))
bus_space_write_multi_2(chp->cmd_iot,
chp->cmd_ioh, wd_data,
(u_int16_t *)((char *)xfer->databuf +
xfer->c_skip),
len >> 1);
else
bus_space_write_multi_stream_2(chp->cmd_iot,
chp->cmd_ioh, wd_data,
(u_int16_t *)((char *)xfer->databuf +
xfer->c_skip),
len >> 1);
xfer->c_skip += len;
xfer->c_bcount -= len;
}
}
if ((sc_xfer->flags & SCSI_POLL) == 0) {
chp->ch_flags |= WDCF_IRQ_WAIT;
}
return 1;
case PHASE_DATAIN:
/* Read data */
WDCDEBUG_PRINT(("PHASE_DATAIN\n"), DEBUG_INTR);
if (((sc_xfer->flags & SCSI_DATA_IN) == 0 &&
(xfer->c_flags & C_SENSE) == 0) ||
(xfer->c_flags & C_DMA) != 0) {
printf("wdc_atapi_intr: bad data phase DATAIN\n");
if (xfer->c_flags & C_DMA) {
(*chp->wdc->dma_finish)(chp->wdc->dma_arg,
chp->channel, xfer->drive, dma_flags);
drvp->n_dmaerrs++;
}
sc_xfer->error = XS_TIMEOUT;
wdc_atapi_reset(chp, xfer);
return 1;
}
if (xfer->c_bcount < len) {
printf("wdc_atapi_intr: warning: reading only "
"%d of %d bytes\n", xfer->c_bcount, len);
if ((chp->wdc->cap & WDC_CAPABILITY_ATAPI_NOSTREAM)) {
bus_space_read_multi_2(chp->cmd_iot,
chp->cmd_ioh, wd_data,
(u_int16_t *)((char *)xfer->databuf +
xfer->c_skip),
xfer->c_bcount >> 1);
} else {
bus_space_read_multi_stream_2(chp->cmd_iot,
chp->cmd_ioh, wd_data,
(u_int16_t *)((char *)xfer->databuf +
xfer->c_skip),
xfer->c_bcount >> 1);
}
wdcbit_bucket(chp, len - xfer->c_bcount);
xfer->c_skip += xfer->c_bcount;
xfer->c_bcount = 0;
} else {
if (drvp->drive_flags & DRIVE_CAP32) {
if ((chp->wdc->cap & WDC_CAPABILITY_ATAPI_NOSTREAM))
bus_space_read_multi_4(chp->data32iot,
chp->data32ioh, 0,
(u_int32_t *)((char *)xfer->databuf +
xfer->c_skip),
len >> 2);
else
bus_space_read_multi_stream_4(chp->data32iot,
chp->data32ioh, wd_data,
(u_int32_t *)((char *)xfer->databuf +
xfer->c_skip),
len >> 2);
xfer->c_skip += len & 0xfffffffc;
xfer->c_bcount -= len & 0xfffffffc;
len = len & 0x03;
}
if (len > 0) {
if ((chp->wdc->cap & WDC_CAPABILITY_ATAPI_NOSTREAM))
bus_space_read_multi_2(chp->cmd_iot,
chp->cmd_ioh, wd_data,
(u_int16_t *)((char *)xfer->databuf +
xfer->c_skip),
len >> 1);
else
bus_space_read_multi_stream_2(chp->cmd_iot,
chp->cmd_ioh, wd_data,
(u_int16_t *)((char *)xfer->databuf +
xfer->c_skip),
len >> 1);
xfer->c_skip += len;
xfer->c_bcount -=len;
}
}
if ((sc_xfer->flags & SCSI_POLL) == 0) {
chp->ch_flags |= WDCF_IRQ_WAIT;
}
return 1;
case PHASE_ABORTED:
case PHASE_COMPLETED:
WDCDEBUG_PRINT(("PHASE_COMPLETED\n"), DEBUG_INTR);
/* turn off DMA channel */
if (xfer->c_flags & C_DMA) {
dma_err = (*chp->wdc->dma_finish)(chp->wdc->dma_arg,
chp->channel, xfer->drive, dma_flags);
if (xfer->c_flags & C_SENSE)
xfer->c_bcount -=
sizeof(sc_xfer->sense.scsi_sense);
else
xfer->c_bcount -= sc_xfer->datalen;
}
if (xfer->c_flags & C_SENSE) {
if ((chp->ch_status & WDCS_ERR) || dma_err < 0) {
/*
* request sense failed ! it's not suppossed
* to be possible
*/
if (dma_err < 0)
drvp->n_dmaerrs++;
sc_xfer->error = XS_RESET;
wdc_atapi_reset(chp, xfer);
return (1);
} else if (xfer->c_bcount <
sizeof(sc_xfer->sense.scsi_sense)) {
/* use the sense we just read */
sc_xfer->error = XS_SENSE;
} else {
/*
* command completed, but no data was read.
* use the short sense we saved previsouly.
*/
sc_xfer->error = XS_SHORTSENSE;
}
} else {
sc_xfer->resid = xfer->c_bcount;
if (chp->ch_status & WDCS_ERR) {
/* save the short sense */
sc_xfer->error = XS_SHORTSENSE;
sc_xfer->sense.atapi_sense = chp->ch_error;
if ((sc_xfer->sc_link->quirks &
ADEV_NOSENSE) == 0) {
/*
* let the driver issue a
* 'request sense'
*/
xfer->databuf = &sc_xfer->sense;
xfer->c_bcount =
sizeof(sc_xfer->sense.scsi_sense);
xfer->c_skip = 0;
xfer->c_flags |= C_SENSE;
untimeout(wdctimeout, chp);
wdc_atapi_start(chp, xfer);
return 1;
}
} else if (dma_err < 0) {
drvp->n_dmaerrs++;
sc_xfer->error = XS_RESET;
wdc_atapi_reset(chp, xfer);
return (1);
}
}
if (xfer->c_bcount != 0) {
WDCDEBUG_PRINT(("wdc_atapi_intr: bcount value is "
"%d after io\n", xfer->c_bcount), DEBUG_XFERS);
}
#ifdef DIAGNOSTIC
if (xfer->c_bcount < 0) {
printf("wdc_atapi_intr warning: bcount value "
"is %d after io\n", xfer->c_bcount);
}
#endif
break;
default:
if (++retries<500) {
DELAY(100);
chp->ch_status = bus_space_read_1(chp->cmd_iot,
chp->cmd_ioh, wd_status);
chp->ch_error = bus_space_read_1(chp->cmd_iot,
chp->cmd_ioh, wd_error);
goto again;
}
printf("wdc_atapi_intr: unknown phase 0x%x\n", phase);
if (chp->ch_status & WDCS_ERR) {
sc_xfer->error = XS_SHORTSENSE;
sc_xfer->sense.atapi_sense = chp->ch_error;
} else {
sc_xfer->error = XS_RESET;
wdc_atapi_reset(chp, xfer);
return (1);
}
}
WDCDEBUG_PRINT(("wdc_atapi_intr: wdc_atapi_done() (end), error 0x%x "
"sense 0x%x\n", sc_xfer->error, sc_xfer->sense.atapi_sense),
DEBUG_INTR);
wdc_atapi_done(chp, xfer);
return (1);
}
int
wdc_atapi_ctrl(chp, xfer, irq)
struct channel_softc *chp;
struct wdc_xfer *xfer;
int irq;
{
struct scsipi_xfer *sc_xfer = xfer->cmd;
struct ata_drive_datas *drvp = &chp->ch_drive[xfer->drive];
char *errstring = NULL;
int delay = (irq == 0) ? ATAPI_DELAY : 0;
/* Ack interrupt done in wait_for_unbusy */
again:
WDCDEBUG_PRINT(("wdc_atapi_ctrl %s:%d:%d state %d\n",
chp->wdc->sc_dev.dv_xname, chp->channel, drvp->drive, drvp->state),
DEBUG_INTR | DEBUG_FUNCS);
bus_space_write_1(chp->cmd_iot, chp->cmd_ioh, wd_sdh,
WDSD_IBM | (xfer->drive << 4));
switch (drvp->state) {
case PIOMODE:
piomode:
/* Don't try to set mode if controller can't be adjusted */
if ((chp->wdc->cap & WDC_CAPABILITY_MODE) == 0)
goto ready;
/* Also don't try if the drive didn't report its mode */
if ((drvp->drive_flags & DRIVE_MODE) == 0)
goto ready;;
wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0,
0x08 | drvp->PIO_mode, WDSF_SET_MODE);
drvp->state = PIOMODE_WAIT;
break;
case PIOMODE_WAIT:
errstring = "piomode";
if (wait_for_unbusy(chp, delay))
goto timeout;
if (chp->ch_status & WDCS_ERR) {
if (drvp->PIO_mode < 3) {
drvp->PIO_mode = 3;
goto piomode;
} else {
goto error;
}
}
/* fall through */
case DMAMODE:
if (drvp->drive_flags & DRIVE_UDMA) {
wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0,
0x40 | drvp->UDMA_mode, WDSF_SET_MODE);
} else if (drvp->drive_flags & DRIVE_DMA) {
wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0,
0x20 | drvp->DMA_mode, WDSF_SET_MODE);
} else {
goto ready;
}
drvp->state = DMAMODE_WAIT;
break;
case DMAMODE_WAIT:
errstring = "dmamode";
if (wait_for_unbusy(chp, delay))
goto timeout;
if (chp->ch_status & WDCS_ERR)
goto error;
/* fall through */
case READY:
ready:
drvp->state = READY;
xfer->c_intr = wdc_atapi_intr;
untimeout(wdctimeout, chp);
wdc_atapi_start(chp, xfer);
return 1;
}
if ((sc_xfer->flags & SCSI_POLL) == 0) {
chp->ch_flags |= WDCF_IRQ_WAIT;
xfer->c_intr = wdc_atapi_ctrl;
} else {
goto again;
}
return 1;
timeout:
if (irq && (xfer->c_flags & C_TIMEOU) == 0) {
return 0; /* IRQ was not for us */
}
printf("%s:%d:%d: %s timed out\n",
chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive, errstring);
sc_xfer->error = XS_TIMEOUT;
wdc_atapi_reset(chp, xfer);
return 1;
error:
printf("%s:%d:%d: %s ",
chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive,
errstring);
printf("error (0x%x)\n", chp->ch_error);
sc_xfer->error = XS_SHORTSENSE;
sc_xfer->sense.atapi_sense = chp->ch_error;
wdc_atapi_reset(chp, xfer);
return 1;
}
void
wdc_atapi_done(chp, xfer)
struct channel_softc *chp;
struct wdc_xfer *xfer;
{
struct scsipi_xfer *sc_xfer = xfer->cmd;
struct ata_drive_datas *drvp = &chp->ch_drive[xfer->drive];
WDCDEBUG_PRINT(("wdc_atapi_done %s:%d:%d: flags 0x%x\n",
chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive,
(u_int)xfer->c_flags), DEBUG_XFERS);
untimeout(wdctimeout, chp);
/* remove this command from xfer queue */
wdc_free_xfer(chp, xfer);
sc_xfer->flags |= ITSDONE;
if (drvp->n_dmaerrs ||
(sc_xfer->error != XS_NOERROR && sc_xfer->error != XS_SENSE &&
sc_xfer->error != XS_SHORTSENSE)) {
drvp->n_dmaerrs = 0;
wdc_downgrade_mode(drvp);
}
WDCDEBUG_PRINT(("wdc_atapi_done: scsipi_done\n"), DEBUG_XFERS);
scsipi_done(sc_xfer);
WDCDEBUG_PRINT(("wdcstart from wdc_atapi_done, flags 0x%x\n",
chp->ch_flags), DEBUG_XFERS);
wdcstart(chp);
}
void
wdc_atapi_reset(chp, xfer)
struct channel_softc *chp;
struct wdc_xfer *xfer;
{
struct ata_drive_datas *drvp = &chp->ch_drive[xfer->drive];
struct scsipi_xfer *sc_xfer = xfer->cmd;
wdccommandshort(chp, xfer->drive, ATAPI_SOFT_RESET);
drvp->state = 0;
if (wait_for_unbusy(chp, WDC_RESET_WAIT) != 0) {
printf("%s:%d:%d: reset failed\n",
chp->wdc->sc_dev.dv_xname, chp->channel,
xfer->drive);
sc_xfer->error = XS_SELTIMEOUT;
}
wdc_atapi_done(chp, xfer);
return;
}
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