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c74553663e
NetBSD/sys/dev/ic/wdc.c
bouyer 1f5d4dd9dd Change wdc_kill_pending() to take a struct ata_drive_datas * as argument, 
and kill only pending requests for this drive.
Implement a DRIVE_WAITDRAIN flag, which will cause the active command to
be killed once complete.
Other minor fixes.
Now it's possible to detach a ATA or ATAPI device from ioctl even when
a dd on the raw char partition is running.
2004-08-04 22:44:04 +00:00

2257 lines
64 KiB
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/* $NetBSD: wdc.c,v 1.187 2004/08/04 22:44:04 bouyer Exp $ */
/*
* Copyright (c) 1998, 2001, 2003 Manuel Bouyer. 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 Manuel Bouyer.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*-
* Copyright (c) 1998, 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum, by Onno van der Linden and by 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* CODE UNTESTED IN THE CURRENT REVISION:
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: wdc.c,v 1.187 2004/08/04 22:44:04 bouyer Exp $");
#ifndef WDCDEBUG
#define WDCDEBUG
#endif /* WDCDEBUG */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/pool.h>
#include <sys/syslog.h>
#include <sys/proc.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/atavar.h>
#include <dev/ata/atareg.h>
#include <dev/ic/wdcreg.h>
#include <dev/ic/wdcvar.h>
#include "locators.h"
#include "ataraid.h"
#include "atapibus.h"
#include "wd.h"
#if NATARAID > 0
#include <dev/ata/ata_raidvar.h>
#endif
#define WDCDELAY 100 /* 100 microseconds */
#define WDCNDELAY_RST (WDC_RESET_WAIT * 1000 / WDCDELAY)
#if 0
/* If you enable this, it will report any delays more than WDCDELAY * N long. */
#define WDCNDELAY_DEBUG 50
#endif
/* When polling wait that much and then tsleep for 1/hz seconds */
#define WDCDELAY_POLL 1 /* ms */
/* timeout for the control commands */
#define WDC_CTRL_DELAY 10000 /* 10s, for the recall command */
struct pool wdc_xfer_pool;
#if NWD > 0
extern const struct ata_bustype wdc_ata_bustype; /* in ata_wdc.c */
#else
/* A fake one, the autoconfig will print "wd at foo ... not configured */
const struct ata_bustype wdc_ata_bustype = {
SCSIPI_BUSTYPE_ATA,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL
};
#endif
static int wdcprobe1(struct wdc_channel*, int);
static void __wdcerror(struct wdc_channel*, char *);
static int __wdcwait_reset(struct wdc_channel *, int, int);
static void __wdccommand_done(struct wdc_channel *, struct ata_xfer *);
static void __wdccommand_done_end(struct wdc_channel *, struct ata_xfer *);
static void __wdccommand_kill_xfer(struct wdc_channel *,
struct ata_xfer *, int);
static void __wdccommand_start(struct wdc_channel *, struct ata_xfer *);
static int __wdccommand_intr(struct wdc_channel *, struct ata_xfer *, int);
static int __wdcwait(struct wdc_channel *, int, int, int);
#define DEBUG_INTR 0x01
#define DEBUG_XFERS 0x02
#define DEBUG_STATUS 0x04
#define DEBUG_FUNCS 0x08
#define DEBUG_PROBE 0x10
#define DEBUG_DETACH 0x20
#define DEBUG_DELAY 0x40
#ifdef WDCDEBUG
int wdcdebug_mask = 0;
int wdc_nxfer = 0;
#define WDCDEBUG_PRINT(args, level) if (wdcdebug_mask & (level)) printf args
#else
#define WDCDEBUG_PRINT(args, level)
#endif
/*
* A queue of atabus instances, used to ensure the same bus probe order
* for a given hardware configuration at each boot.
*/
struct atabus_initq_head atabus_initq_head =
TAILQ_HEAD_INITIALIZER(atabus_initq_head);
struct simplelock atabus_interlock = SIMPLELOCK_INITIALIZER;
/*
* Initialize the "shadow register" handles for a standard wdc controller.
*/
void
wdc_init_shadow_regs(struct wdc_channel *chp)
{
chp->cmd_iohs[wd_status] = chp->cmd_iohs[wd_command];
chp->cmd_iohs[wd_features] = chp->cmd_iohs[wd_error];
}
/* Test to see controller with at last one attached drive is there.
* Returns a bit for each possible drive found (0x01 for drive 0,
* 0x02 for drive 1).
* Logic:
* - If a status register is at 0xff, assume there is no drive here
* (ISA has pull-up resistors). Similarly if the status register has
* the value we last wrote to the bus (for IDE interfaces without pullups).
* If no drive at all -> return.
* - reset the controller, wait for it to complete (may take up to 31s !).
* If timeout -> return.
* - test ATA/ATAPI signatures. If at last one drive found -> return.
* - try an ATA command on the master.
*/
static void
wdc_drvprobe(struct wdc_channel *chp)
{
struct ataparams params;
struct wdc_softc *wdc = chp->ch_wdc;
u_int8_t st0 = 0, st1 = 0;
int i, error;
if (wdcprobe1(chp, 0) == 0) {
/* No drives, abort the attach here. */
return;
}
/* for ATA/OLD drives, wait for DRDY, 3s timeout */
for (i = 0; i < mstohz(3000); i++) {
if (chp->ch_drive[0].drive_flags & (DRIVE_ATA|DRIVE_OLD)) {
if (wdc != NULL && (wdc->cap & WDC_CAPABILITY_SELECT))
wdc->select(chp,0);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh],
0, WDSD_IBM);
delay(10); /* 400ns delay */
st0 = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_status], 0);
}
if (chp->ch_drive[1].drive_flags & (DRIVE_ATA|DRIVE_OLD)) {
if (wdc != NULL && (wdc->cap & WDC_CAPABILITY_SELECT))
wdc->select(chp,1);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh],
0, WDSD_IBM | 0x10);
delay(10); /* 400ns delay */
st1 = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_status], 0);
}
if (((chp->ch_drive[0].drive_flags & (DRIVE_ATA|DRIVE_OLD))
== 0 ||
(st0 & WDCS_DRDY)) &&
((chp->ch_drive[1].drive_flags & (DRIVE_ATA|DRIVE_OLD))
== 0 ||
(st1 & WDCS_DRDY)))
break;
tsleep(&params, PRIBIO, "atadrdy", 1);
}
if ((st0 & WDCS_DRDY) == 0)
chp->ch_drive[0].drive_flags &= ~(DRIVE_ATA|DRIVE_OLD);
if ((st1 & WDCS_DRDY) == 0)
chp->ch_drive[1].drive_flags &= ~(DRIVE_ATA|DRIVE_OLD);
WDCDEBUG_PRINT(("%s:%d: wait DRDY st0 0x%x st1 0x%x\n",
wdc->sc_dev.dv_xname,
chp->ch_channel, st0, st1), DEBUG_PROBE);
/* Wait a bit, some devices are weird just after a reset. */
delay(5000);
for (i = 0; i < 2; i++) {
/* XXX This should be done by other code. */
chp->ch_drive[i].chnl_softc = chp;
chp->ch_drive[i].drive = i;
/*
* Init error counter so that an error withing the first xfers
* will trigger a downgrade
*/
chp->ch_drive[i].n_dmaerrs = NERRS_MAX-1;
/* If controller can't do 16bit flag the drives as 32bit */
if ((wdc->cap &
(WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_DATA32)) ==
WDC_CAPABILITY_DATA32)
chp->ch_drive[i].drive_flags |= DRIVE_CAP32;
if ((chp->ch_drive[i].drive_flags & DRIVE) == 0)
continue;
/* Shortcut in case we've been shutdown */
if (chp->ch_flags & WDCF_SHUTDOWN)
return;
/* issue an identify, to try to detect ghosts */
error = ata_get_params(&chp->ch_drive[i],
AT_WAIT | AT_POLL, &params);
if (error != CMD_OK) {
tsleep(&params, PRIBIO, "atacnf", mstohz(1000));
/* Shortcut in case we've been shutdown */
if (chp->ch_flags & WDCF_SHUTDOWN)
return;
error = ata_get_params(&chp->ch_drive[i],
AT_WAIT | AT_POLL, &params);
}
if (error == CMD_OK) {
/* If IDENTIFY succeeded, this is not an OLD ctrl */
chp->ch_drive[0].drive_flags &= ~DRIVE_OLD;
chp->ch_drive[1].drive_flags &= ~DRIVE_OLD;
} else {
chp->ch_drive[i].drive_flags &=
~(DRIVE_ATA | DRIVE_ATAPI);
WDCDEBUG_PRINT(("%s:%d:%d: IDENTIFY failed (%d)\n",
wdc->sc_dev.dv_xname,
chp->ch_channel, i, error), DEBUG_PROBE);
if ((chp->ch_drive[i].drive_flags & DRIVE_OLD) == 0)
continue;
/*
* Pre-ATA drive ?
* Test registers writability (Error register not
* writable, but cyllo is), then try an ATA command.
*/
if (wdc->cap & WDC_CAPABILITY_SELECT)
wdc->select(chp,i);
bus_space_write_1(chp->cmd_iot,
chp->cmd_iohs[wd_sdh], 0, WDSD_IBM | (i << 4));
delay(10); /* 400ns delay */
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_error],
0, 0x58);
bus_space_write_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_lo], 0, 0xa5);
if (bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_error], 0) == 0x58 ||
bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_lo], 0) != 0xa5) {
WDCDEBUG_PRINT(("%s:%d:%d: register "
"writability failed\n",
wdc->sc_dev.dv_xname,
chp->ch_channel, i), DEBUG_PROBE);
chp->ch_drive[i].drive_flags &= ~DRIVE_OLD;
continue;
}
if (wdc_wait_for_ready(chp, 10000, 0) == WDCWAIT_TOUT) {
WDCDEBUG_PRINT(("%s:%d:%d: not ready\n",
wdc->sc_dev.dv_xname,
chp->ch_channel, i), DEBUG_PROBE);
chp->ch_drive[i].drive_flags &= ~DRIVE_OLD;
continue;
}
bus_space_write_1(chp->cmd_iot,
chp->cmd_iohs[wd_command], 0, WDCC_RECAL);
delay(10); /* 400ns delay */
if (wdc_wait_for_ready(chp, 10000, 0) == WDCWAIT_TOUT) {
WDCDEBUG_PRINT(("%s:%d:%d: WDCC_RECAL failed\n",
wdc->sc_dev.dv_xname,
chp->ch_channel, i), DEBUG_PROBE);
chp->ch_drive[i].drive_flags &= ~DRIVE_OLD;
} else {
chp->ch_drive[0].drive_flags &=
~(DRIVE_ATA | DRIVE_ATAPI);
chp->ch_drive[1].drive_flags &=
~(DRIVE_ATA | DRIVE_ATAPI);
}
}
}
}
void
atabusconfig(struct atabus_softc *atabus_sc)
{
struct wdc_channel *chp = atabus_sc->sc_chan;
struct wdc_softc *wdc = chp->ch_wdc;
int i, error, need_delref = 0;
struct atabus_initq *atabus_initq = NULL;
if ((error = wdc_addref(chp)) != 0) {
aprint_error("%s: unable to enable controller\n",
wdc->sc_dev.dv_xname);
goto out;
}
need_delref = 1;
/* Probe for the drives. */
(*wdc->drv_probe)(chp);
WDCDEBUG_PRINT(("atabusattach: ch_drive_flags 0x%x 0x%x\n",
chp->ch_drive[0].drive_flags, chp->ch_drive[1].drive_flags),
DEBUG_PROBE);
/* If no drives, abort here */
if ((chp->ch_drive[0].drive_flags & DRIVE) == 0 &&
(chp->ch_drive[1].drive_flags & DRIVE) == 0)
goto out;
/* Shortcut in case we've been shutdown */
if (chp->ch_flags & WDCF_SHUTDOWN)
goto out;
/* Make sure the devices probe in atabus order to avoid jitter. */
simple_lock(&atabus_interlock);
while(1) {
atabus_initq = TAILQ_FIRST(&atabus_initq_head);
if (atabus_initq->atabus_sc == atabus_sc)
break;
ltsleep(&atabus_initq_head, PRIBIO, "ata_initq", 0,
&atabus_interlock);
}
simple_unlock(&atabus_interlock);
/*
* Attach an ATAPI bus, if needed.
*/
if ((chp->ch_drive[0].drive_flags & DRIVE_ATAPI) ||
(chp->ch_drive[1].drive_flags & DRIVE_ATAPI)) {
#if NATAPIBUS > 0
wdc_atapibus_attach(atabus_sc);
#else
/*
* Fake the autoconfig "not configured" message
*/
aprint_normal("atapibus at %s not configured\n",
wdc->sc_dev.dv_xname);
chp->atapibus = NULL;
chp->ch_drive[0].drive_flags &= ~DRIVE_ATAPI;
chp->ch_drive[1].drive_flags &= ~DRIVE_ATAPI;
#endif
}
for (i = 0; i < 2; i++) {
struct ata_device adev;
if ((chp->ch_drive[i].drive_flags &
(DRIVE_ATA | DRIVE_OLD)) == 0) {
continue;
}
memset(&adev, 0, sizeof(struct ata_device));
adev.adev_bustype = &wdc_ata_bustype;
adev.adev_channel = chp->ch_channel;
adev.adev_openings = 1;
adev.adev_drv_data = &chp->ch_drive[i];
chp->ata_drives[i] = config_found(&atabus_sc->sc_dev,
&adev, ataprint);
if (chp->ata_drives[i] != NULL)
wdc_probe_caps(&chp->ch_drive[i]);
else
chp->ch_drive[i].drive_flags &=
~(DRIVE_ATA | DRIVE_OLD);
}
/* now that we know the drives, the controller can set its modes */
if (wdc->cap & WDC_CAPABILITY_MODE) {
wdc->set_modes(chp);
wdc_print_modes(chp);
}
#if NATARAID > 0
if (wdc->cap & WDC_CAPABILITY_RAID)
for (i = 0; i < 2; i++)
if (chp->ata_drives[i] != NULL)
ata_raid_check_component(chp->ata_drives[i]);
#endif /* NATARAID > 0 */
/*
* reset drive_flags for unattached devices, reset state for attached
* ones
*/
for (i = 0; i < 2; i++) {
if (chp->ch_drive[i].drv_softc == NULL)
chp->ch_drive[i].drive_flags = 0;
else
chp->ch_drive[i].state = 0;
}
out:
if (atabus_initq == NULL) {
simple_lock(&atabus_interlock);
while(1) {
atabus_initq = TAILQ_FIRST(&atabus_initq_head);
if (atabus_initq->atabus_sc == atabus_sc)
break;
ltsleep(&atabus_initq_head, PRIBIO, "ata_initq", 0,
&atabus_interlock);
}
simple_unlock(&atabus_interlock);
}
simple_lock(&atabus_interlock);
TAILQ_REMOVE(&atabus_initq_head, atabus_initq, atabus_initq);
simple_unlock(&atabus_interlock);
free(atabus_initq, M_DEVBUF);
wakeup(&atabus_initq_head);
config_pending_decr();
if (need_delref)
wdc_delref(chp);
}
int
wdcprobe(struct wdc_channel *chp)
{
return (wdcprobe1(chp, 1));
}
static int
wdcprobe1(struct wdc_channel *chp, int poll)
{
struct wdc_softc *wdc = chp->ch_wdc;
u_int8_t st0, st1, sc, sn, cl, ch;
u_int8_t ret_value = 0x03;
u_int8_t drive;
int s;
/*
* Sanity check to see if the wdc channel responds at all.
*/
s = splbio();
if (wdc == NULL ||
(wdc->cap & WDC_CAPABILITY_NO_EXTRA_RESETS) == 0) {
if (wdc != NULL && (wdc->cap & WDC_CAPABILITY_SELECT))
wdc->select(chp,0);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh], 0,
WDSD_IBM);
delay(10); /* 400ns delay */
st0 = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_status], 0);
if (wdc != NULL && (wdc->cap & WDC_CAPABILITY_SELECT))
wdc->select(chp,1);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh], 0,
WDSD_IBM | 0x10);
delay(10); /* 400ns delay */
st1 = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_status], 0);
WDCDEBUG_PRINT(("%s:%d: before reset, st0=0x%x, st1=0x%x\n",
wdc != NULL ? wdc->sc_dev.dv_xname : "wdcprobe",
chp->ch_channel, st0, st1), DEBUG_PROBE);
if (st0 == 0xff || st0 == WDSD_IBM)
ret_value &= ~0x01;
if (st1 == 0xff || st1 == (WDSD_IBM | 0x10))
ret_value &= ~0x02;
/* Register writability test, drive 0. */
if (ret_value & 0x01) {
if (wdc != NULL && (wdc->cap & WDC_CAPABILITY_SELECT))
wdc->select(chp,0);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh],
0, WDSD_IBM);
bus_space_write_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_lo], 0, 0x02);
cl = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_lo], 0);
if (cl != 0x02) {
WDCDEBUG_PRINT(("%s:%d drive 0 wd_cyl_lo: "
"got 0x%x != 0x02\n",
wdc != NULL ?
wdc->sc_dev.dv_xname : "wdcprobe",
chp->ch_channel, cl),
DEBUG_PROBE);
ret_value &= ~0x01;
}
bus_space_write_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_lo], 0, 0x01);
cl = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_lo], 0);
if (cl != 0x01) {
WDCDEBUG_PRINT(("%s:%d drive 0 wd_cyl_lo: "
"got 0x%x != 0x01\n",
wdc != NULL ?
wdc->sc_dev.dv_xname : "wdcprobe",
chp->ch_channel, cl),
DEBUG_PROBE);
ret_value &= ~0x01;
}
bus_space_write_1(chp->cmd_iot,
chp->cmd_iohs[wd_sector], 0, 0x01);
cl = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_sector], 0);
if (cl != 0x01) {
WDCDEBUG_PRINT(("%s:%d drive 0 wd_sector: "
"got 0x%x != 0x01\n",
wdc != NULL ?
wdc->sc_dev.dv_xname : "wdcprobe",
chp->ch_channel, cl),
DEBUG_PROBE);
ret_value &= ~0x01;
}
bus_space_write_1(chp->cmd_iot,
chp->cmd_iohs[wd_sector], 0, 0x02);
cl = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_sector], 0);
if (cl != 0x02) {
WDCDEBUG_PRINT(("%s:%d drive 0 wd_sector: "
"got 0x%x != 0x02\n",
wdc != NULL ?
wdc->sc_dev.dv_xname : "wdcprobe",
chp->ch_channel, cl),
DEBUG_PROBE);
ret_value &= ~0x01;
}
cl = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_lo], 0);
if (cl != 0x01) {
WDCDEBUG_PRINT(("%s:%d drive 0 wd_cyl_lo(2): "
"got 0x%x != 0x01\n",
wdc != NULL ?
wdc->sc_dev.dv_xname : "wdcprobe",
chp->ch_channel, cl),
DEBUG_PROBE);
ret_value &= ~0x01;
}
}
/* Register writability test, drive 1. */
if (ret_value & 0x02) {
if (wdc != NULL && (wdc->cap & WDC_CAPABILITY_SELECT))
wdc->select(chp,1);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh],
0, WDSD_IBM | 0x10);
bus_space_write_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_lo], 0, 0x02);
cl = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_lo], 0);
if (cl != 0x02) {
WDCDEBUG_PRINT(("%s:%d drive 1 wd_cyl_lo: "
"got 0x%x != 0x02\n",
wdc != NULL ?
wdc->sc_dev.dv_xname : "wdcprobe",
chp->ch_channel, cl),
DEBUG_PROBE);
ret_value &= ~0x02;
}
bus_space_write_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_lo], 0, 0x01);
cl = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_lo], 0);
if (cl != 0x01) {
WDCDEBUG_PRINT(("%s:%d drive 1 wd_cyl_lo: "
"got 0x%x != 0x01\n",
wdc != NULL ?
wdc->sc_dev.dv_xname : "wdcprobe",
chp->ch_channel, cl),
DEBUG_PROBE);
ret_value &= ~0x02;
}
bus_space_write_1(chp->cmd_iot,
chp->cmd_iohs[wd_sector], 0, 0x01);
cl = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_sector], 0);
if (cl != 0x01) {
WDCDEBUG_PRINT(("%s:%d drive 1 wd_sector: "
"got 0x%x != 0x01\n",
wdc != NULL ?
wdc->sc_dev.dv_xname : "wdcprobe",
chp->ch_channel, cl),
DEBUG_PROBE);
ret_value &= ~0x02;
}
bus_space_write_1(chp->cmd_iot,
chp->cmd_iohs[wd_sector], 0, 0x02);
cl = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_sector], 0);
if (cl != 0x02) {
WDCDEBUG_PRINT(("%s:%d drive 1 wd_sector: "
"got 0x%x != 0x02\n",
wdc != NULL ?
wdc->sc_dev.dv_xname : "wdcprobe",
chp->ch_channel, cl),
DEBUG_PROBE);
ret_value &= ~0x02;
}
cl = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_lo], 0);
if (cl != 0x01) {
WDCDEBUG_PRINT(("%s:%d drive 1 wd_cyl_lo(2): "
"got 0x%x != 0x01\n",
wdc != NULL ?
wdc->sc_dev.dv_xname : "wdcprobe",
chp->ch_channel, cl),
DEBUG_PROBE);
ret_value &= ~0x02;
}
}
if (ret_value == 0) {
splx(s);
return 0;
}
}
#if 0 /* XXX this break some ATA or ATAPI devices */
/*
* reset bus. Also send an ATAPI_RESET to devices, in case there are
* ATAPI device out there which don't react to the bus reset
*/
if (ret_value & 0x01) {
if (wdc != NULL && (wdc->cap & WDC_CAPABILITY_SELECT))
wdc->select(chp,0);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh],
0, WDSD_IBM);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_command], 0,
ATAPI_SOFT_RESET);
}
if (ret_value & 0x02) {
if (wdc != NULL && (wdc->cap & WDC_CAPABILITY_SELECT))
wdc->select(chp,0);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh],
0, WDSD_IBM | 0x10);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_command], 0,
ATAPI_SOFT_RESET);
}
delay(5000);
#endif
if (wdc != NULL && (wdc->cap & WDC_CAPABILITY_SELECT))
wdc->select(chp,0);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh], 0, WDSD_IBM);
delay(10); /* 400ns delay */
/* assert SRST, wait for reset to complete */
bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr,
WDCTL_RST | WDCTL_IDS | WDCTL_4BIT);
DELAY(1000);
bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr,
WDCTL_IDS | WDCTL_4BIT);
DELAY(2000);
(void) bus_space_read_1(chp->cmd_iot, chp->cmd_iohs[wd_error], 0);
bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT);
delay(10); /* 400ns delay */
/* ACK interrupt in case there is one pending left (Promise ATA100) */
if (wdc != NULL && (wdc->cap & WDC_CAPABILITY_IRQACK))
wdc->irqack(chp);
splx(s);
ret_value = __wdcwait_reset(chp, ret_value, poll);
WDCDEBUG_PRINT(("%s:%d: after reset, ret_value=0x%d\n",
wdc != NULL ? wdc->sc_dev.dv_xname : "wdcprobe", chp->ch_channel,
ret_value), DEBUG_PROBE);
/* if reset failed, there's nothing here */
if (ret_value == 0)
return 0;
/*
* Test presence of drives. First test register signatures looking
* for ATAPI devices. If it's not an ATAPI and reset said there may
* be something here assume it's ATA or OLD. Ghost will be killed
* later in attach routine.
*/
for (drive = 0; drive < 2; drive++) {
if ((ret_value & (0x01 << drive)) == 0)
continue;
if (wdc != NULL && wdc->cap & WDC_CAPABILITY_SELECT)
wdc->select(chp,drive);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh], 0,
WDSD_IBM | (drive << 4));
delay(10); /* 400ns delay */
/* Save registers contents */
sc = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_seccnt], 0);
sn = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_sector], 0);
cl = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_lo], 0);
ch = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_hi], 0);
WDCDEBUG_PRINT(("%s:%d:%d: after reset, sc=0x%x sn=0x%x "
"cl=0x%x ch=0x%x\n",
wdc != NULL ? wdc->sc_dev.dv_xname : "wdcprobe",
chp->ch_channel, drive, sc, sn, cl, ch), DEBUG_PROBE);
/*
* sc & sn are supposted to be 0x1 for ATAPI but in some cases
* we get wrong values here, so ignore it.
*/
if (cl == 0x14 && ch == 0xeb) {
chp->ch_drive[drive].drive_flags |= DRIVE_ATAPI;
} else {
chp->ch_drive[drive].drive_flags |= DRIVE_ATA;
if (wdc == NULL ||
(wdc->cap & WDC_CAPABILITY_PREATA) != 0)
chp->ch_drive[drive].drive_flags |= DRIVE_OLD;
}
}
return (ret_value);
}
void
wdcattach(struct wdc_channel *chp)
{
struct wdc_softc *wdc = chp->ch_wdc;
static int inited = 0;
if (chp->ch_flags & WDCF_DISABLED)
return;
/* initialise global data */
callout_init(&chp->ch_callout);
if (wdc->drv_probe == NULL)
wdc->drv_probe = wdc_drvprobe;
if (inited == 0) {
/* Initialize the ata_xfer pool. */
pool_init(&wdc_xfer_pool, sizeof(struct ata_xfer), 0,
0, 0, "wdcspl", NULL);
inited++;
}
TAILQ_INIT(&chp->ch_queue->queue_xfer);
chp->ch_queue->queue_freeze = 0;
chp->ch_queue->active_xfer = NULL;
chp->atabus = config_found(&wdc->sc_dev, chp, atabusprint);
}
int
wdcactivate(struct device *self, enum devact act)
{
struct wdc_softc *wdc = (struct wdc_softc *)self;
int s, i, error = 0;
s = splbio();
switch (act) {
case DVACT_ACTIVATE:
error = EOPNOTSUPP;
break;
case DVACT_DEACTIVATE:
for (i = 0; i < wdc->nchannels; i++) {
error = config_deactivate(wdc->channels[i]->atabus);
if (error)
break;
}
break;
}
splx(s);
return (error);
}
int
wdcdetach(struct device *self, int flags)
{
struct wdc_softc *wdc = (struct wdc_softc *)self;
struct wdc_channel *chp;
int i, error = 0;
for (i = 0; i < wdc->nchannels; i++) {
chp = wdc->channels[i];
WDCDEBUG_PRINT(("wdcdetach: %s: detaching %s\n",
wdc->sc_dev.dv_xname, chp->atabus->dv_xname), DEBUG_DETACH);
error = config_detach(chp->atabus, flags);
if (error)
break;
}
return (error);
}
/*
* Start I/O on a controller, for the given channel.
* The first xfer may be not for our channel if the channel queues
* are shared.
*/
void
wdcstart(struct wdc_channel *chp)
{
struct wdc_softc *wdc = chp->ch_wdc;
struct ata_xfer *xfer;
#ifdef WDC_DIAGNOSTIC
int spl1, spl2;
spl1 = splbio();
spl2 = splbio();
if (spl2 != spl1) {
printf("wdcstart: not at splbio()\n");
panic("wdcstart");
}
splx(spl2);
splx(spl1);
#endif /* WDC_DIAGNOSTIC */
/* is there a xfer ? */
if ((xfer = TAILQ_FIRST(&chp->ch_queue->queue_xfer)) == NULL)
return;
/* adjust chp, in case we have a shared queue */
chp = xfer->c_chp;
if (chp->ch_queue->active_xfer != NULL) {
return; /* channel aleady active */
}
if (__predict_false(chp->ch_queue->queue_freeze > 0)) {
return; /* queue froozen */
}
#ifdef DIAGNOSTIC
if ((chp->ch_flags & WDCF_IRQ_WAIT) != 0)
panic("wdcstart: channel waiting for irq");
#endif
if (wdc->cap & WDC_CAPABILITY_HWLOCK)
if (!(*wdc->claim_hw)(chp, 0))
return;
WDCDEBUG_PRINT(("wdcstart: xfer %p channel %d drive %d\n", xfer,
chp->ch_channel, xfer->c_drive), DEBUG_XFERS);
if (chp->ch_drive[xfer->c_drive].drive_flags & DRIVE_RESET) {
chp->ch_drive[xfer->c_drive].drive_flags &= ~DRIVE_RESET;
chp->ch_drive[xfer->c_drive].state = 0;
}
chp->ch_queue->active_xfer = xfer;
TAILQ_REMOVE(&chp->ch_queue->queue_xfer, xfer, c_xferchain);
if (wdc->cap & WDC_CAPABILITY_NOIRQ)
KASSERT(xfer->c_flags & C_POLL);
xfer->c_start(chp, xfer);
}
/* restart an interrupted I/O */
void
wdcrestart(void *v)
{
struct wdc_channel *chp = v;
int s;
s = splbio();
wdcstart(chp);
splx(s);
}
/*
* Interrupt routine for the controller. Acknowledge the interrupt, check for
* errors on the current operation, mark it done if necessary, and start the
* next request. Also check for a partially done transfer, and continue with
* the next chunk if so.
*/
int
wdcintr(void *arg)
{
struct wdc_channel *chp = arg;
struct wdc_softc *wdc = chp->ch_wdc;
struct ata_xfer *xfer;
int ret;
if ((wdc->sc_dev.dv_flags & DVF_ACTIVE) == 0) {
WDCDEBUG_PRINT(("wdcintr: deactivated controller\n"),
DEBUG_INTR);
return (0);
}
if ((chp->ch_flags & WDCF_IRQ_WAIT) == 0) {
WDCDEBUG_PRINT(("wdcintr: inactive controller\n"), DEBUG_INTR);
/* try to clear the pending interrupt anyway */
(void)bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_status], 0);
return (0);
}
WDCDEBUG_PRINT(("wdcintr\n"), DEBUG_INTR);
xfer = chp->ch_queue->active_xfer;
#ifdef DIAGNOSTIC
if (xfer == NULL)
panic("wdcintr: no xfer");
#endif
if (chp->ch_flags & WDCF_DMA_WAIT) {
wdc->dma_status =
(*wdc->dma_finish)(wdc->dma_arg, chp->ch_channel,
xfer->c_drive, WDC_DMAEND_END);
if (wdc->dma_status & WDC_DMAST_NOIRQ) {
/* IRQ not for us, not detected by DMA engine */
return 0;
}
chp->ch_flags &= ~WDCF_DMA_WAIT;
}
chp->ch_flags &= ~WDCF_IRQ_WAIT;
ret = xfer->c_intr(chp, xfer, 1);
if (ret == 0) /* irq was not for us, still waiting for irq */
chp->ch_flags |= WDCF_IRQ_WAIT;
return (ret);
}
/* Put all disk in RESET state */
void
wdc_reset_drive(struct ata_drive_datas *drvp, int flags)
{
struct wdc_channel *chp = drvp->chnl_softc;
struct wdc_softc *wdc = chp->ch_wdc;
WDCDEBUG_PRINT(("ata_reset_channel %s:%d for drive %d\n",
wdc->sc_dev.dv_xname, chp->ch_channel, drvp->drive),
DEBUG_FUNCS);
wdc_reset_channel(chp, flags);
}
void
wdc_reset_channel(struct wdc_channel *chp, int flags)
{
TAILQ_HEAD(, ata_xfer) reset_xfer;
struct ata_xfer *xfer, *next_xfer;
int drive;
chp->ch_queue->queue_freeze++;
TAILQ_INIT(&reset_xfer);
/* if we can poll or wait it's OK, otherwise wake up the kernel
* thread
*/
if ((flags & (AT_POLL | AT_WAIT)) == 0) {
if (chp->ch_flags & WDCF_TH_RESET) {
/* no need to schedule a reset more than one time */
return;
}
chp->ch_flags |= WDCF_TH_RESET;
chp->ch_reset_flags = flags & (AT_RST_EMERG | AT_RST_NOCMD);
wakeup(&chp->ch_thread);
return;
}
chp->ch_flags &= ~WDCF_IRQ_WAIT;
/*
* if the current command if on an ATAPI device, issue a
* ATAPI_SOFT_RESET
*/
xfer = chp->ch_queue->active_xfer;
if (xfer && xfer->c_chp == chp && (xfer->c_flags & C_ATAPI)) {
wdccommandshort(chp, xfer->c_drive, ATAPI_SOFT_RESET);
if (flags & AT_WAIT)
tsleep(&flags, PRIBIO, "atardl", mstohz(1) + 1);
else
delay(1000);
}
/* reset the channel */
if (flags & AT_WAIT)
(void) wdcreset(chp, RESET_SLEEP);
else
(void) wdcreset(chp, RESET_POLL);
/*
* wait a bit after reset; in case the DMA engines needs some time
* to recover.
*/
if (flags & AT_WAIT)
tsleep(&flags, PRIBIO, "atardl", mstohz(1) + 1);
else
delay(1000);
/*
* look for pending xfers. If we have a shared queue, we'll also reset
* the other channel if the current xfer is running on it.
* Then we'll dequeue only the xfers for this channel.
*/
if ((flags & AT_RST_NOCMD) == 0) {
/*
* move all xfers queued for this channel to the reset queue,
* and then process the current xfer and then the reset queue.
* We have to use a temporary queue because c_kill_xfer()
* may requeue commands.
*/
for (xfer = TAILQ_FIRST(&chp->ch_queue->queue_xfer);
xfer != NULL; xfer = next_xfer) {
next_xfer = TAILQ_NEXT(xfer, c_xferchain);
if (xfer->c_chp != chp)
continue;
TAILQ_REMOVE(&chp->ch_queue->queue_xfer,
xfer, c_xferchain);
TAILQ_INSERT_TAIL(&reset_xfer, xfer, c_xferchain);
}
xfer = chp->ch_queue->active_xfer;
if (xfer) {
if (xfer->c_chp != chp)
wdc_reset_channel(xfer->c_chp, flags);
else {
callout_stop(&chp->ch_callout);
/*
* If we're waiting for DMA, stop the
* DMA engine
*/
if (chp->ch_flags & WDCF_DMA_WAIT) {
(*chp->ch_wdc->dma_finish)(
chp->ch_wdc->dma_arg,
chp->ch_channel,
xfer->c_drive,
WDC_DMAEND_ABRT_QUIET);
chp->ch_flags &= ~WDCF_DMA_WAIT;
}
chp->ch_queue->active_xfer = NULL;
if ((flags & AT_RST_EMERG) == 0)
xfer->c_kill_xfer(
chp, xfer, KILL_RESET);
}
}
for (xfer = TAILQ_FIRST(&reset_xfer);
xfer != NULL; xfer = next_xfer) {
next_xfer = TAILQ_NEXT(xfer, c_xferchain);
TAILQ_REMOVE(&reset_xfer, xfer, c_xferchain);
if ((flags & AT_RST_EMERG) == 0)
xfer->c_kill_xfer(chp, xfer, KILL_RESET);
}
}
for (drive = 0; drive < 2; drive++) {
chp->ch_drive[drive].state = 0;
}
chp->ch_flags &= ~WDCF_TH_RESET;
if ((flags & AT_RST_EMERG) == 0) {
chp->ch_queue->queue_freeze--;
wdcstart(chp);
} else {
/* make sure that we can use polled commands */
TAILQ_INIT(&chp->ch_queue->queue_xfer);
chp->ch_queue->queue_freeze = 0;
chp->ch_queue->active_xfer = NULL;
}
}
int
wdcreset(struct wdc_channel *chp, int poll)
{
struct wdc_softc *wdc = chp->ch_wdc;
int drv_mask1, drv_mask2;
int s = 0;
if (wdc->cap & WDC_CAPABILITY_SELECT)
wdc->select(chp,0);
if (poll != RESET_SLEEP)
s = splbio();
/* master */
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh], 0, WDSD_IBM);
delay(10); /* 400ns delay */
bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr,
WDCTL_RST | WDCTL_IDS | WDCTL_4BIT);
delay(2000);
(void) bus_space_read_1(chp->cmd_iot, chp->cmd_iohs[wd_error], 0);
bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr,
WDCTL_4BIT | WDCTL_IDS);
delay(10); /* 400ns delay */
if (poll != RESET_SLEEP) {
if (wdc->cap & WDC_CAPABILITY_IRQACK)
wdc->irqack(chp);
splx(s);
}
drv_mask1 = (chp->ch_drive[0].drive_flags & DRIVE) ? 0x01:0x00;
drv_mask1 |= (chp->ch_drive[1].drive_flags & DRIVE) ? 0x02:0x00;
drv_mask2 = __wdcwait_reset(chp, drv_mask1,
(poll == RESET_SLEEP) ? 0 : 1);
if (drv_mask2 != drv_mask1) {
printf("%s channel %d: reset failed for",
wdc->sc_dev.dv_xname, chp->ch_channel);
if ((drv_mask1 & 0x01) != 0 && (drv_mask2 & 0x01) == 0)
printf(" drive 0");
if ((drv_mask1 & 0x02) != 0 && (drv_mask2 & 0x02) == 0)
printf(" drive 1");
printf("\n");
}
bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT);
return (drv_mask1 != drv_mask2) ? 1 : 0;
}
static int
__wdcwait_reset(struct wdc_channel *chp, int drv_mask, int poll)
{
struct wdc_softc *wdc = chp->ch_wdc;
int timeout, nloop;
u_int8_t st0 = 0, st1 = 0;
#ifdef WDCDEBUG
u_int8_t sc0 = 0, sn0 = 0, cl0 = 0, ch0 = 0;
u_int8_t sc1 = 0, sn1 = 0, cl1 = 0, ch1 = 0;
#endif
if (poll)
nloop = WDCNDELAY_RST;
else
nloop = WDC_RESET_WAIT * hz / 1000;
/* wait for BSY to deassert */
for (timeout = 0; timeout < nloop; timeout++) {
if ((drv_mask & 0x01) != 0) {
if (wdc && wdc->cap & WDC_CAPABILITY_SELECT)
wdc->select(chp,0);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh],
0, WDSD_IBM); /* master */
delay(10);
st0 = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_status], 0);
#ifdef WDCDEBUG
sc0 = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_seccnt], 0);
sn0 = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_sector], 0);
cl0 = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_lo], 0);
ch0 = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_hi], 0);
#endif
}
if ((drv_mask & 0x02) != 0) {
if (wdc && wdc->cap & WDC_CAPABILITY_SELECT)
wdc->select(chp,1);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh],
0, WDSD_IBM | 0x10); /* slave */
delay(10);
st1 = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_status], 0);
#ifdef WDCDEBUG
sc1 = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_seccnt], 0);
sn1 = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_sector], 0);
cl1 = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_lo], 0);
ch1 = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_hi], 0);
#endif
}
if ((drv_mask & 0x01) == 0) {
/* no master */
if ((drv_mask & 0x02) != 0 && (st1 & WDCS_BSY) == 0) {
/* No master, slave is ready, it's done */
goto end;
}
} else if ((drv_mask & 0x02) == 0) {
/* no slave */
if ((drv_mask & 0x01) != 0 && (st0 & WDCS_BSY) == 0) {
/* No slave, master is ready, it's done */
goto end;
}
} else {
/* Wait for both master and slave to be ready */
if ((st0 & WDCS_BSY) == 0 && (st1 & WDCS_BSY) == 0) {
goto end;
}
}
if (poll)
delay(WDCDELAY);
else
tsleep(&nloop, PRIBIO, "atarst", 1);
}
/* Reset timed out. Maybe it's because drv_mask was not right */
if (st0 & WDCS_BSY)
drv_mask &= ~0x01;
if (st1 & WDCS_BSY)
drv_mask &= ~0x02;
end:
WDCDEBUG_PRINT(("%s:%d:0: after reset, sc=0x%x sn=0x%x "
"cl=0x%x ch=0x%x\n",
wdc != NULL ? wdc->sc_dev.dv_xname : "wdcprobe",
chp->ch_channel, sc0, sn0, cl0, ch0), DEBUG_PROBE);
WDCDEBUG_PRINT(("%s:%d:1: after reset, sc=0x%x sn=0x%x "
"cl=0x%x ch=0x%x\n",
wdc != NULL ? wdc->sc_dev.dv_xname : "wdcprobe",
chp->ch_channel, sc1, sn1, cl1, ch1), DEBUG_PROBE);
WDCDEBUG_PRINT(("%s:%d: wdcwait_reset() end, st0=0x%x st1=0x%x\n",
wdc != NULL ? wdc->sc_dev.dv_xname : "wdcprobe", chp->ch_channel,
st0, st1), DEBUG_PROBE);
return drv_mask;
}
/*
* Wait for a drive to be !BSY, and have mask in its status register.
* return -1 for a timeout after "timeout" ms.
*/
static int
__wdcwait(struct wdc_channel *chp, int mask, int bits, int timeout)
{
struct wdc_softc *wdc = chp->ch_wdc;
u_char status;
int time = 0;
WDCDEBUG_PRINT(("__wdcwait %s:%d\n", wdc != NULL ?
wdc->sc_dev.dv_xname : "none",
chp->ch_channel), DEBUG_STATUS);
chp->ch_error = 0;
timeout = timeout * 1000 / WDCDELAY; /* delay uses microseconds */
for (;;) {
chp->ch_status = status =
bus_space_read_1(chp->cmd_iot, chp->cmd_iohs[wd_status], 0);
if ((status & (WDCS_BSY | mask)) == bits)
break;
if (++time > timeout) {
WDCDEBUG_PRINT(("__wdcwait: timeout (time=%d), "
"status %x error %x (mask 0x%x bits 0x%x)\n",
time, status,
bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_error], 0), mask, bits),
DEBUG_STATUS | DEBUG_PROBE | DEBUG_DELAY);
return(WDCWAIT_TOUT);
}
delay(WDCDELAY);
}
#ifdef WDCDEBUG
if (time > 0 && (wdcdebug_mask & DEBUG_DELAY))
printf("__wdcwait: did busy-wait, time=%d\n", time);
#endif
if (status & WDCS_ERR)
chp->ch_error = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_error], 0);
#ifdef WDCNDELAY_DEBUG
/* After autoconfig, there should be no long delays. */
if (!cold && time > WDCNDELAY_DEBUG) {
struct ata_xfer *xfer = chp->ch_queue->active_xfer;
if (xfer == NULL)
printf("%s channel %d: warning: busy-wait took %dus\n",
wdc->sc_dev.dv_xname, chp->ch_channel,
WDCDELAY * time);
else
printf("%s:%d:%d: warning: busy-wait took %dus\n",
wdc->sc_dev.dv_xname, chp->ch_channel,
xfer->drive,
WDCDELAY * time);
}
#endif
return(WDCWAIT_OK);
}
/*
* Call __wdcwait(), polling using tsleep() or waking up the kernel
* thread if possible
*/
int
wdcwait(struct wdc_channel *chp, int mask, int bits, int timeout, int flags)
{
int error, i, timeout_hz = mstohz(timeout);
if (timeout_hz == 0 ||
(flags & (AT_WAIT | AT_POLL)) == AT_POLL)
error = __wdcwait(chp, mask, bits, timeout);
else {
error = __wdcwait(chp, mask, bits, WDCDELAY_POLL);
if (error != 0) {
if ((chp->ch_flags & WDCF_TH_RUN) ||
(flags & AT_WAIT)) {
/*
* we're running in the channel thread
* or some userland thread context
*/
for (i = 0; i < timeout_hz; i++) {
if (__wdcwait(chp, mask, bits,
WDCDELAY_POLL) == 0) {
error = 0;
break;
}
tsleep(&chp, PRIBIO, "atapoll", 1);
}
} else {
/*
* we're probably in interrupt context,
* ask the thread to come back here
*/
#ifdef DIAGNOSTIC
if (chp->ch_queue->queue_freeze > 0)
panic("wdcwait: queue_freeze");
#endif
chp->ch_queue->queue_freeze++;
wakeup(&chp->ch_thread);
return(WDCWAIT_THR);
}
}
}
return (error);
}
/*
* Busy-wait for DMA to complete
*/
int
wdc_dmawait(struct wdc_channel *chp, struct ata_xfer *xfer, int timeout)
{
struct wdc_softc *wdc = chp->ch_wdc;
int time;
for (time = 0; time < timeout * 1000 / WDCDELAY; time++) {
wdc->dma_status =
(*wdc->dma_finish)(wdc->dma_arg,
chp->ch_channel, xfer->c_drive, WDC_DMAEND_END);
if ((wdc->dma_status & WDC_DMAST_NOIRQ) == 0)
return 0;
delay(WDCDELAY);
}
/* timeout, force a DMA halt */
wdc->dma_status = (*wdc->dma_finish)(wdc->dma_arg,
chp->ch_channel, xfer->c_drive, WDC_DMAEND_ABRT);
return 1;
}
void
wdctimeout(void *arg)
{
struct wdc_channel *chp = (struct wdc_channel *)arg;
struct wdc_softc *wdc = chp->ch_wdc;
struct ata_xfer *xfer = chp->ch_queue->active_xfer;
int s;
WDCDEBUG_PRINT(("wdctimeout\n"), DEBUG_FUNCS);
s = splbio();
if ((chp->ch_flags & WDCF_IRQ_WAIT) != 0) {
__wdcerror(chp, "lost interrupt");
printf("\ttype: %s tc_bcount: %d tc_skip: %d\n",
(xfer->c_flags & C_ATAPI) ? "atapi" : "ata",
xfer->c_bcount,
xfer->c_skip);
if (chp->ch_flags & WDCF_DMA_WAIT) {
wdc->dma_status =
(*wdc->dma_finish)(wdc->dma_arg,
chp->ch_channel, xfer->c_drive,
WDC_DMAEND_ABRT);
chp->ch_flags &= ~WDCF_DMA_WAIT;
}
/*
* Call the interrupt routine. If we just missed an interrupt,
* it will do what's needed. Else, it will take the needed
* action (reset the device).
* Before that we need to reinstall the timeout callback,
* in case it will miss another irq while in this transfer
* We arbitray chose it to be 1s
*/
callout_reset(&chp->ch_callout, hz, wdctimeout, chp);
xfer->c_flags |= C_TIMEOU;
chp->ch_flags &= ~WDCF_IRQ_WAIT;
xfer->c_intr(chp, xfer, 1);
} else
__wdcerror(chp, "missing untimeout");
splx(s);
}
/*
* Probe drive's capabilities, for use by the controller later
* Assumes drvp points to an existing drive.
* XXX this should be a controller-indep function
*/
void
wdc_probe_caps(struct ata_drive_datas *drvp)
{
struct ataparams params, params2;
struct wdc_channel *chp = drvp->chnl_softc;
struct wdc_softc *wdc = chp->ch_wdc;
struct device *drv_dev = drvp->drv_softc;
int i, printed;
char *sep = "";
int cf_flags;
if (ata_get_params(drvp, AT_WAIT, &params) != CMD_OK) {
/* IDENTIFY failed. Can't tell more about the device */
return;
}
if ((wdc->cap & (WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_DATA32)) ==
(WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_DATA32)) {
/*
* Controller claims 16 and 32 bit transfers.
* Re-do an IDENTIFY with 32-bit transfers,
* and compare results.
*/
drvp->drive_flags |= DRIVE_CAP32;
ata_get_params(drvp, AT_WAIT, &params2);
if (memcmp(&params, &params2, sizeof(struct ataparams)) != 0) {
/* Not good. fall back to 16bits */
drvp->drive_flags &= ~DRIVE_CAP32;
} else {
aprint_normal("%s: 32-bit data port\n",
drv_dev->dv_xname);
}
}
#if 0 /* Some ultra-DMA drives claims to only support ATA-3. sigh */
if (params.atap_ata_major > 0x01 &&
params.atap_ata_major != 0xffff) {
for (i = 14; i > 0; i--) {
if (params.atap_ata_major & (1 << i)) {
aprint_normal("%s: ATA version %d\n",
drv_dev->dv_xname, i);
drvp->ata_vers = i;
break;
}
}
}
#endif
/* An ATAPI device is at last PIO mode 3 */
if (drvp->drive_flags & DRIVE_ATAPI)
drvp->PIO_mode = 3;
/*
* It's not in the specs, but it seems that some drive
* returns 0xffff in atap_extensions when this field is invalid
*/
if (params.atap_extensions != 0xffff &&
(params.atap_extensions & WDC_EXT_MODES)) {
printed = 0;
/*
* XXX some drives report something wrong here (they claim to
* support PIO mode 8 !). As mode is coded on 3 bits in
* SET FEATURE, limit it to 7 (so limit i to 4).
* If higher mode than 7 is found, abort.
*/
for (i = 7; i >= 0; i--) {
if ((params.atap_piomode_supp & (1 << i)) == 0)
continue;
if (i > 4)
return;
/*
* See if mode is accepted.
* If the controller can't set its PIO mode,
* assume the defaults are good, so don't try
* to set it
*/
if ((wdc->cap & WDC_CAPABILITY_MODE) != 0)
/*
* It's OK to pool here, it's fast enouth
* to not bother waiting for interrupt
*/
if (ata_set_mode(drvp, 0x08 | (i + 3),
AT_WAIT) != CMD_OK)
continue;
if (!printed) {
aprint_normal("%s: drive supports PIO mode %d",
drv_dev->dv_xname, i + 3);
sep = ",";
printed = 1;
}
/*
* If controller's driver can't set its PIO mode,
* get the highter one for the drive.
*/
if ((wdc->cap & WDC_CAPABILITY_MODE) == 0 ||
wdc->PIO_cap >= i + 3) {
drvp->PIO_mode = i + 3;
drvp->PIO_cap = i + 3;
break;
}
}
if (!printed) {
/*
* We didn't find a valid PIO mode.
* Assume the values returned for DMA are buggy too
*/
return;
}
drvp->drive_flags |= DRIVE_MODE;
printed = 0;
for (i = 7; i >= 0; i--) {
if ((params.atap_dmamode_supp & (1 << i)) == 0)
continue;
if ((wdc->cap & WDC_CAPABILITY_DMA) &&
(wdc->cap & WDC_CAPABILITY_MODE))
if (ata_set_mode(drvp, 0x20 | i, AT_WAIT)
!= CMD_OK)
continue;
if (!printed) {
aprint_normal("%s DMA mode %d", sep, i);
sep = ",";
printed = 1;
}
if (wdc->cap & WDC_CAPABILITY_DMA) {
if ((wdc->cap & WDC_CAPABILITY_MODE) &&
wdc->DMA_cap < i)
continue;
drvp->DMA_mode = i;
drvp->DMA_cap = i;
drvp->drive_flags |= DRIVE_DMA;
}
break;
}
if (params.atap_extensions & WDC_EXT_UDMA_MODES) {
printed = 0;
for (i = 7; i >= 0; i--) {
if ((params.atap_udmamode_supp & (1 << i))
== 0)
continue;
if ((wdc->cap & WDC_CAPABILITY_MODE) &&
(wdc->cap & WDC_CAPABILITY_UDMA))
if (ata_set_mode(drvp, 0x40 | i,
AT_WAIT) != CMD_OK)
continue;
if (!printed) {
aprint_normal("%s Ultra-DMA mode %d",
sep, i);
if (i == 2)
aprint_normal(" (Ultra/33)");
else if (i == 4)
aprint_normal(" (Ultra/66)");
else if (i == 5)
aprint_normal(" (Ultra/100)");
else if (i == 6)
aprint_normal(" (Ultra/133)");
sep = ",";
printed = 1;
}
if (wdc->cap & WDC_CAPABILITY_UDMA) {
if ((wdc->cap & WDC_CAPABILITY_MODE) &&
wdc->UDMA_cap < i)
continue;
drvp->UDMA_mode = i;
drvp->UDMA_cap = i;
drvp->drive_flags |= DRIVE_UDMA;
}
break;
}
}
aprint_normal("\n");
}
/* Try to guess ATA version here, if it didn't get reported */
if (drvp->ata_vers == 0) {
if (drvp->drive_flags & DRIVE_UDMA)
drvp->ata_vers = 4; /* should be at last ATA-4 */
else if (drvp->PIO_cap > 2)
drvp->ata_vers = 2; /* should be at last ATA-2 */
}
cf_flags = drv_dev->dv_cfdata->cf_flags;
if (cf_flags & ATA_CONFIG_PIO_SET) {
drvp->PIO_mode =
(cf_flags & ATA_CONFIG_PIO_MODES) >> ATA_CONFIG_PIO_OFF;
drvp->drive_flags |= DRIVE_MODE;
}
if ((wdc->cap & WDC_CAPABILITY_DMA) == 0) {
/* don't care about DMA modes */
return;
}
if (cf_flags & ATA_CONFIG_DMA_SET) {
if ((cf_flags & ATA_CONFIG_DMA_MODES) ==
ATA_CONFIG_DMA_DISABLE) {
drvp->drive_flags &= ~DRIVE_DMA;
} else {
drvp->DMA_mode = (cf_flags & ATA_CONFIG_DMA_MODES) >>
ATA_CONFIG_DMA_OFF;
drvp->drive_flags |= DRIVE_DMA | DRIVE_MODE;
}
}
if ((wdc->cap & WDC_CAPABILITY_UDMA) == 0) {
/* don't care about UDMA modes */
return;
}
if (cf_flags & ATA_CONFIG_UDMA_SET) {
if ((cf_flags & ATA_CONFIG_UDMA_MODES) ==
ATA_CONFIG_UDMA_DISABLE) {
drvp->drive_flags &= ~DRIVE_UDMA;
} else {
drvp->UDMA_mode = (cf_flags & ATA_CONFIG_UDMA_MODES) >>
ATA_CONFIG_UDMA_OFF;
drvp->drive_flags |= DRIVE_UDMA | DRIVE_MODE;
}
}
}
/*
* downgrade the transfer mode of a drive after an error. return 1 if
* downgrade was possible, 0 otherwise.
*/
int
wdc_downgrade_mode(struct ata_drive_datas *drvp, int flags)
{
struct wdc_channel *chp = drvp->chnl_softc;
struct wdc_softc *wdc = chp->ch_wdc;
struct device *drv_dev = drvp->drv_softc;
int cf_flags = drv_dev->dv_cfdata->cf_flags;
/* if drive or controller don't know its mode, we can't do much */
if ((drvp->drive_flags & DRIVE_MODE) == 0 ||
(wdc->cap & WDC_CAPABILITY_MODE) == 0)
return 0;
/* current drive mode was set by a config flag, let it this way */
if ((cf_flags & ATA_CONFIG_PIO_SET) ||
(cf_flags & ATA_CONFIG_DMA_SET) ||
(cf_flags & ATA_CONFIG_UDMA_SET))
return 0;
/*
* If we were using Ultra-DMA mode, downgrade to the next lower mode.
*/
if ((drvp->drive_flags & DRIVE_UDMA) && drvp->UDMA_mode >= 2) {
drvp->UDMA_mode--;
printf("%s: transfer error, downgrading to Ultra-DMA mode %d\n",
drv_dev->dv_xname, drvp->UDMA_mode);
}
/*
* If we were using ultra-DMA, don't downgrade to multiword DMA.
*/
else if (drvp->drive_flags & (DRIVE_DMA | DRIVE_UDMA)) {
drvp->drive_flags &= ~(DRIVE_DMA | DRIVE_UDMA);
drvp->PIO_mode = drvp->PIO_cap;
printf("%s: transfer error, downgrading to PIO mode %d\n",
drv_dev->dv_xname, drvp->PIO_mode);
} else /* already using PIO, can't downgrade */
return 0;
wdc->set_modes(chp);
wdc_print_modes(chp);
/* reset the channel, which will shedule all drives for setup */
wdc_reset_channel(chp, flags | AT_RST_NOCMD);
return 1;
}
int
wdc_exec_command(struct ata_drive_datas *drvp, struct wdc_command *wdc_c)
{
struct wdc_channel *chp = drvp->chnl_softc;
struct wdc_softc *wdc = chp->ch_wdc;
struct ata_xfer *xfer;
int s, ret;
WDCDEBUG_PRINT(("wdc_exec_command %s:%d:%d\n",
wdc->sc_dev.dv_xname, chp->ch_channel, drvp->drive),
DEBUG_FUNCS);
/* set up an xfer and queue. Wait for completion */
xfer = wdc_get_xfer(wdc_c->flags & AT_WAIT ? WDC_CANSLEEP :
WDC_NOSLEEP);
if (xfer == NULL) {
return WDC_TRY_AGAIN;
}
if (wdc->cap & WDC_CAPABILITY_NOIRQ)
wdc_c->flags |= AT_POLL;
if (wdc_c->flags & AT_POLL)
xfer->c_flags |= C_POLL;
xfer->c_drive = drvp->drive;
xfer->c_databuf = wdc_c->data;
xfer->c_bcount = wdc_c->bcount;
xfer->c_cmd = wdc_c;
xfer->c_start = __wdccommand_start;
xfer->c_intr = __wdccommand_intr;
xfer->c_kill_xfer = __wdccommand_kill_xfer;
s = splbio();
wdc_exec_xfer(chp, xfer);
#ifdef DIAGNOSTIC
if ((wdc_c->flags & AT_POLL) != 0 &&
(wdc_c->flags & AT_DONE) == 0)
panic("wdc_exec_command: polled command not done");
#endif
if (wdc_c->flags & AT_DONE) {
ret = WDC_COMPLETE;
} else {
if (wdc_c->flags & AT_WAIT) {
while ((wdc_c->flags & AT_DONE) == 0) {
tsleep(wdc_c, PRIBIO, "wdccmd", 0);
}
ret = WDC_COMPLETE;
} else {
ret = WDC_QUEUED;
}
}
splx(s);
return ret;
}
static void
__wdccommand_start(struct wdc_channel *chp, struct ata_xfer *xfer)
{
struct wdc_softc *wdc = chp->ch_wdc;
int drive = xfer->c_drive;
struct wdc_command *wdc_c = xfer->c_cmd;
WDCDEBUG_PRINT(("__wdccommand_start %s:%d:%d\n",
wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive),
DEBUG_FUNCS);
if (wdc->cap & WDC_CAPABILITY_SELECT)
wdc->select(chp,drive);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh], 0,
WDSD_IBM | (drive << 4));
switch(wdcwait(chp, wdc_c->r_st_bmask | WDCS_DRQ,
wdc_c->r_st_bmask, wdc_c->timeout, wdc_c->flags)) {
case WDCWAIT_OK:
break;
case WDCWAIT_TOUT:
wdc_c->flags |= AT_TIMEOU;
__wdccommand_done(chp, xfer);
return;
case WDCWAIT_THR:
return;
}
if (wdc_c->flags & AT_POLL) {
/* polled command, disable interrupts */
bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr,
WDCTL_4BIT | WDCTL_IDS);
}
wdccommand(chp, drive, wdc_c->r_command, wdc_c->r_cyl, wdc_c->r_head,
wdc_c->r_sector, wdc_c->r_count, wdc_c->r_features);
if ((wdc_c->flags & AT_POLL) == 0) {
chp->ch_flags |= WDCF_IRQ_WAIT; /* wait for interrupt */
callout_reset(&chp->ch_callout, wdc_c->timeout / 1000 * hz,
wdctimeout, chp);
return;
}
/*
* Polled command. Wait for drive ready or drq. Done in intr().
* Wait for at last 400ns for status bit to be valid.
*/
delay(10); /* 400ns delay */
__wdccommand_intr(chp, xfer, 0);
}
static int
__wdccommand_intr(struct wdc_channel *chp, struct ata_xfer *xfer, int irq)
{
struct wdc_softc *wdc = chp->ch_wdc;
struct wdc_command *wdc_c = xfer->c_cmd;
int bcount = wdc_c->bcount;
char *data = wdc_c->data;
int wflags;
if ((wdc_c->flags & (AT_WAIT | AT_POLL)) == (AT_WAIT | AT_POLL)) {
/* both wait and poll, we can tsleep here */
wflags = AT_WAIT | AT_POLL;
} else {
wflags = AT_POLL;
}
again:
WDCDEBUG_PRINT(("__wdccommand_intr %s:%d:%d\n",
wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive),
DEBUG_INTR);
/*
* after a ATAPI_SOFT_RESET, the device will have released the bus.
* Reselect again, it doesn't hurt for others commands, and the time
* penalty for the extra regiter write is acceptable,
* wdc_exec_command() isn't called often (mosly for autoconfig)
*/
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh], 0,
WDSD_IBM | (xfer->c_drive << 4));
if ((wdc_c->flags & AT_XFDONE) != 0) {
/*
* We have completed a data xfer. The drive should now be
* in its initial state
*/
if (wdcwait(chp, wdc_c->r_st_bmask | WDCS_DRQ,
wdc_c->r_st_bmask, (irq == 0) ? wdc_c->timeout : 0,
wflags) == WDCWAIT_TOUT) {
if (irq && (xfer->c_flags & C_TIMEOU) == 0)
return 0; /* IRQ was not for us */
wdc_c->flags |= AT_TIMEOU;
}
goto out;
}
if (wdcwait(chp, wdc_c->r_st_pmask, wdc_c->r_st_pmask,
(irq == 0) ? wdc_c->timeout : 0, wflags) == WDCWAIT_TOUT) {
if (irq && (xfer->c_flags & C_TIMEOU) == 0)
return 0; /* IRQ was not for us */
wdc_c->flags |= AT_TIMEOU;
goto out;
}
if (wdc->cap & WDC_CAPABILITY_IRQACK)
wdc->irqack(chp);
if (wdc_c->flags & AT_READ) {
if ((chp->ch_status & WDCS_DRQ) == 0) {
wdc_c->flags |= AT_TIMEOU;
goto out;
}
if (chp->ch_drive[xfer->c_drive].drive_flags & DRIVE_CAP32) {
bus_space_read_multi_4(chp->data32iot, chp->data32ioh,
0, (u_int32_t*)data, bcount >> 2);
data += bcount & 0xfffffffc;
bcount = bcount & 0x03;
}
if (bcount > 0)
bus_space_read_multi_2(chp->cmd_iot,
chp->cmd_iohs[wd_data], 0,
(u_int16_t *)data, bcount >> 1);
/* at this point the drive should be in its initial state */
wdc_c->flags |= AT_XFDONE;
/* XXX should read status register here ? */
} else if (wdc_c->flags & AT_WRITE) {
if ((chp->ch_status & WDCS_DRQ) == 0) {
wdc_c->flags |= AT_TIMEOU;
goto out;
}
if (chp->ch_drive[xfer->c_drive].drive_flags & DRIVE_CAP32) {
bus_space_write_multi_4(chp->data32iot, chp->data32ioh,
0, (u_int32_t*)data, bcount >> 2);
data += bcount & 0xfffffffc;
bcount = bcount & 0x03;
}
if (bcount > 0)
bus_space_write_multi_2(chp->cmd_iot,
chp->cmd_iohs[wd_data], 0,
(u_int16_t *)data, bcount >> 1);
wdc_c->flags |= AT_XFDONE;
if ((wdc_c->flags & AT_POLL) == 0) {
chp->ch_flags |= WDCF_IRQ_WAIT; /* wait for interrupt */
callout_reset(&chp->ch_callout,
wdc_c->timeout / 1000 * hz, wdctimeout, chp);
return 1;
} else {
goto again;
}
}
out:
__wdccommand_done(chp, xfer);
return 1;
}
static void
__wdccommand_done(struct wdc_channel *chp, struct ata_xfer *xfer)
{
struct wdc_softc *wdc = chp->ch_wdc;
struct wdc_command *wdc_c = xfer->c_cmd;
WDCDEBUG_PRINT(("__wdccommand_done %s:%d:%d\n",
wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive),
DEBUG_FUNCS);
if (chp->ch_status & WDCS_DWF)
wdc_c->flags |= AT_DF;
if (chp->ch_status & WDCS_ERR) {
wdc_c->flags |= AT_ERROR;
wdc_c->r_error = chp->ch_error;
}
if ((wdc_c->flags & AT_READREG) != 0 &&
(wdc->sc_dev.dv_flags & DVF_ACTIVE) != 0 &&
(wdc_c->flags & (AT_ERROR | AT_DF)) == 0) {
wdc_c->r_head = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_sdh], 0);
wdc_c->r_count = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_seccnt], 0);
wdc_c->r_sector = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_sector], 0);
wdc_c->r_cyl |= bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_lo], 0);
wdc_c->r_cyl = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_cyl_hi], 0) << 8;
wdc_c->r_error = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_error], 0);
wdc_c->r_features = bus_space_read_1(chp->cmd_iot,
chp->cmd_iohs[wd_features], 0);
}
callout_stop(&chp->ch_callout);
chp->ch_queue->active_xfer = NULL;
if (wdc_c->flags & AT_POLL) {
/* enable interrupts */
bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr,
WDCTL_4BIT);
delay(10); /* some drives need a little delay here */
}
if (chp->ch_drive[xfer->c_drive].drive_flags & DRIVE_WAITDRAIN) {
__wdccommand_kill_xfer(chp, xfer, KILL_GONE);
chp->ch_drive[xfer->c_drive].drive_flags &= ~DRIVE_WAITDRAIN;
wakeup(&chp->ch_queue->active_xfer);
} else
__wdccommand_done_end(chp, xfer);
}
static void
__wdccommand_done_end(struct wdc_channel *chp, struct ata_xfer *xfer)
{
struct wdc_command *wdc_c = xfer->c_cmd;
wdc_c->flags |= AT_DONE;
wdc_free_xfer(chp, xfer);
if (wdc_c->flags & AT_WAIT)
wakeup(wdc_c);
else if (wdc_c->callback)
wdc_c->callback(wdc_c->callback_arg);
wdcstart(chp);
return;
}
static void
__wdccommand_kill_xfer(struct wdc_channel *chp, struct ata_xfer *xfer,
int reason)
{
struct wdc_command *wdc_c = xfer->c_cmd;
switch (reason) {
case KILL_GONE:
wdc_c->flags |= AT_GONE;
break;
case KILL_RESET:
wdc_c->flags |= AT_RESET;
break;
default:
printf("__wdccommand_kill_xfer: unknown reason %d\n",
reason);
panic("__wdccommand_kill_xfer");
}
__wdccommand_done_end(chp, xfer);
}
/*
* Send a command. The drive should be ready.
* Assumes interrupts are blocked.
*/
void
wdccommand(struct wdc_channel *chp, u_int8_t drive, u_int8_t command,
u_int16_t cylin, u_int8_t head, u_int8_t sector, u_int8_t count,
u_int8_t features)
{
struct wdc_softc *wdc = chp->ch_wdc;
WDCDEBUG_PRINT(("wdccommand %s:%d:%d: command=0x%x cylin=%d head=%d "
"sector=%d count=%d features=%d\n", wdc->sc_dev.dv_xname,
chp->ch_channel, drive, command, cylin, head, sector, count,
features), DEBUG_FUNCS);
if (wdc->cap & WDC_CAPABILITY_SELECT)
wdc->select(chp,drive);
/* Select drive, head, and addressing mode. */
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh], 0,
WDSD_IBM | (drive << 4) | head);
/* Load parameters into the wd_features register. */
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_features], 0,
features);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_seccnt], 0, count);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sector], 0, sector);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_cyl_lo], 0, cylin);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_cyl_hi],
0, cylin >> 8);
/* Send command. */
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_command], 0, command);
return;
}
/*
* Send a 48-bit addressing command. The drive should be ready.
* Assumes interrupts are blocked.
*/
void
wdccommandext(struct wdc_channel *chp, u_int8_t drive, u_int8_t command,
u_int64_t blkno, u_int16_t count)
{
struct wdc_softc *wdc = chp->ch_wdc;
WDCDEBUG_PRINT(("wdccommandext %s:%d:%d: command=0x%x blkno=%d "
"count=%d\n", wdc->sc_dev.dv_xname,
chp->ch_channel, drive, command, (u_int32_t) blkno, count),
DEBUG_FUNCS);
if (wdc->cap & WDC_CAPABILITY_SELECT)
wdc->select(chp,drive);
/* Select drive, head, and addressing mode. */
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh], 0,
(drive << 4) | WDSD_LBA);
/* previous */
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_features], 0, 0);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_seccnt],
0, count >> 8);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_lba_lo],
0, blkno >> 24);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_lba_mi],
0, blkno >> 32);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_lba_hi],
0, blkno >> 40);
/* current */
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_features], 0, 0);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_seccnt], 0, count);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_lba_lo], 0, blkno);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_lba_mi],
0, blkno >> 8);
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_lba_hi],
0, blkno >> 16);
/* Send command. */
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_command], 0, command);
return;
}
/*
* Simplified version of wdccommand(). Unbusy/ready/drq must be
* tested by the caller.
*/
void
wdccommandshort(struct wdc_channel *chp, int drive, int command)
{
struct wdc_softc *wdc = chp->ch_wdc;
WDCDEBUG_PRINT(("wdccommandshort %s:%d:%d command 0x%x\n",
wdc->sc_dev.dv_xname, chp->ch_channel, drive, command),
DEBUG_FUNCS);
if (wdc->cap & WDC_CAPABILITY_SELECT)
wdc->select(chp,drive);
/* Select drive. */
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh], 0,
WDSD_IBM | (drive << 4));
bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_command], 0, command);
}
/* Add a command to the queue and start controller. Must be called at splbio */
void
wdc_exec_xfer(struct wdc_channel *chp, struct ata_xfer *xfer)
{
WDCDEBUG_PRINT(("wdc_exec_xfer %p channel %d drive %d\n", xfer,
chp->ch_channel, xfer->c_drive), DEBUG_XFERS);
/* complete xfer setup */
xfer->c_chp = chp;
/* insert at the end of command list */
TAILQ_INSERT_TAIL(&chp->ch_queue->queue_xfer, xfer, c_xferchain);
WDCDEBUG_PRINT(("wdcstart from wdc_exec_xfer, flags 0x%x\n",
chp->ch_flags), DEBUG_XFERS);
wdcstart(chp);
}
struct ata_xfer *
wdc_get_xfer(int flags)
{
struct ata_xfer *xfer;
int s;
s = splbio();
xfer = pool_get(&wdc_xfer_pool,
((flags & WDC_NOSLEEP) != 0 ? PR_NOWAIT : PR_WAITOK));
splx(s);
if (xfer != NULL) {
memset(xfer, 0, sizeof(struct ata_xfer));
}
return xfer;
}
void
wdc_free_xfer(struct wdc_channel *chp, struct ata_xfer *xfer)
{
struct wdc_softc *wdc = chp->ch_wdc;
int s;
if (wdc->cap & WDC_CAPABILITY_HWLOCK)
(*wdc->free_hw)(chp);
s = splbio();
pool_put(&wdc_xfer_pool, xfer);
splx(s);
}
/*
* Kill off all pending xfers for a wdc_channel.
*
* Must be called at splbio().
*/
void
wdc_kill_pending(struct ata_drive_datas *drvp)
{
struct wdc_channel *chp = drvp->chnl_softc;
struct ata_xfer *xfer, *next_xfer;
int s = splbio();
for (xfer = TAILQ_FIRST(&chp->ch_queue->queue_xfer);
xfer != NULL; xfer = next_xfer) {
next_xfer = TAILQ_NEXT(xfer, c_xferchain);
if (xfer->c_chp != chp || xfer->c_drive != drvp->drive)
continue;
TAILQ_REMOVE(&chp->ch_queue->queue_xfer, xfer, c_xferchain);
(*xfer->c_kill_xfer)(chp, xfer, KILL_GONE);
}
while ((xfer = chp->ch_queue->active_xfer) != NULL) {
if (xfer->c_chp == chp && xfer->c_drive == drvp->drive) {
drvp->drive_flags |= DRIVE_WAITDRAIN;
(void) tsleep(&chp->ch_queue->active_xfer,
PRIBIO, "atdrn", 0);
} else {
/* no more xfer for us */
break;
}
}
splx(s);
}
static void
__wdcerror(struct wdc_channel *chp, char *msg)
{
struct wdc_softc *wdc = chp->ch_wdc;
struct ata_xfer *xfer = TAILQ_FIRST(&chp->ch_queue->queue_xfer);
if (xfer == NULL)
printf("%s:%d: %s\n", wdc->sc_dev.dv_xname, chp->ch_channel,
msg);
else
printf("%s:%d:%d: %s\n", wdc->sc_dev.dv_xname,
chp->ch_channel, xfer->c_drive, msg);
}
/*
* the bit bucket
*/
void
wdcbit_bucket(struct wdc_channel *chp, int size)
{
for (; size >= 2; size -= 2)
(void)bus_space_read_2(chp->cmd_iot, chp->cmd_iohs[wd_data], 0);
if (size)
(void)bus_space_read_1(chp->cmd_iot, chp->cmd_iohs[wd_data], 0);
}
int
wdc_addref(struct wdc_channel *chp)
{
struct wdc_softc *wdc = chp->ch_wdc;
struct scsipi_adapter *adapt = &wdc->sc_atapi_adapter._generic;
int s, error = 0;
s = splbio();
if (adapt->adapt_refcnt++ == 0 &&
adapt->adapt_enable != NULL) {
error = (*adapt->adapt_enable)(&wdc->sc_dev, 1);
if (error)
adapt->adapt_refcnt--;
}
splx(s);
return (error);
}
void
wdc_delref(struct wdc_channel *chp)
{
struct wdc_softc *wdc = chp->ch_wdc;
struct scsipi_adapter *adapt = &wdc->sc_atapi_adapter._generic;
int s;
s = splbio();
if (adapt->adapt_refcnt-- == 1 &&
adapt->adapt_enable != NULL)
(void) (*adapt->adapt_enable)(&wdc->sc_dev, 0);
splx(s);
}
void
wdc_print_modes(struct wdc_channel *chp)
{
struct wdc_softc *wdc = chp->ch_wdc;
int drive;
struct ata_drive_datas *drvp;
for (drive = 0; drive < 2; drive++) {
drvp = &chp->ch_drive[drive];
if ((drvp->drive_flags & DRIVE) == 0)
continue;
aprint_normal("%s(%s:%d:%d): using PIO mode %d",
drvp->drv_softc->dv_xname,
wdc->sc_dev.dv_xname,
chp->ch_channel, drive, drvp->PIO_mode);
if (drvp->drive_flags & DRIVE_DMA)
aprint_normal(", DMA mode %d", drvp->DMA_mode);
if (drvp->drive_flags & DRIVE_UDMA) {
aprint_normal(", Ultra-DMA mode %d", drvp->UDMA_mode);
if (drvp->UDMA_mode == 2)
aprint_normal(" (Ultra/33)");
else if (drvp->UDMA_mode == 4)
aprint_normal(" (Ultra/66)");
else if (drvp->UDMA_mode == 5)
aprint_normal(" (Ultra/100)");
else if (drvp->UDMA_mode == 6)
aprint_normal(" (Ultra/133)");
}
if (drvp->drive_flags & (DRIVE_DMA | DRIVE_UDMA))
aprint_normal(" (using DMA data transfers)");
aprint_normal("\n");
}
}
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