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|
/* $OpenBSD: wdc.c,v 1.2 2008/06/26 05:42:13 ray Exp $ */
/* $NetBSD: wdc.c,v 1.7 2005/12/11 12:17:06 christos Exp $ */
/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* 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.
*
* 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.
*/
#include <sys/types.h>
#include <machine/param.h>
#include "libsa.h"
#include "wdvar.h"
#define WDCDELAY 100
#define WDCNDELAY_RST 31000 * 10
static int wdcprobe(struct wdc_channel *chp);
static int wdc_wait_for_ready(struct wdc_channel *chp);
static int wdc_read_block(struct wd_softc *sc, struct wdc_command *wd_c);
static int __wdcwait_reset(struct wdc_channel *chp, int drv_mask);
/*
* Reset the controller.
*/
static int
__wdcwait_reset(chp, drv_mask)
struct wdc_channel *chp;
int drv_mask;
{
int timeout;
u_int8_t st0, st1;
/* wait for BSY to deassert */
for (timeout = 0; timeout < WDCNDELAY_RST; timeout++) {
WDC_WRITE_REG(chp, wd_sdh, WDSD_IBM); /* master */
delay(10);
st0 = WDC_READ_REG(chp, wd_status);
WDC_WRITE_REG(chp, wd_sdh, WDSD_IBM | 0x10); /* slave */
delay(10);
st1 = WDC_READ_REG(chp, wd_status);
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;
}
}
delay(WDCDELAY);
}
/* 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:
return (drv_mask);
}
/* 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.
*/
static int
wdcprobe(chp)
struct wdc_channel *chp;
{
u_int8_t st0, st1, sc, sn, cl, ch;
u_int8_t ret_value = 0x03;
u_int8_t drive;
int found;
/*
* Sanity check to see if the wdc channel responds at all.
*/
WDC_WRITE_REG(chp, wd_sdh, WDSD_IBM);
delay(10);
st0 = WDC_READ_REG(chp, wd_status);
WDC_WRITE_REG(chp, wd_sdh, WDSD_IBM | 0x10);
delay(10);
st1 = WDC_READ_REG(chp, wd_status);
if (st0 == 0xff || st0 == WDSD_IBM)
ret_value &= ~0x01;
if (st1 == 0xff || st1 == (WDSD_IBM | 0x10))
ret_value &= ~0x02;
if (ret_value == 0)
return (ENXIO);
/* assert SRST, wait for reset to complete */
WDC_WRITE_REG(chp, wd_sdh, WDSD_IBM);
delay(10);
WDC_WRITE_CTLREG(chp, wd_aux_ctlr, WDCTL_RST | WDCTL_IDS);
delay(1000);
WDC_WRITE_CTLREG(chp, wd_aux_ctlr, WDCTL_IDS);
delay(1000);
(void) WDC_READ_REG(chp, wd_error);
WDC_WRITE_CTLREG(chp, wd_aux_ctlr, WDCTL_4BIT);
delay(10);
ret_value = __wdcwait_reset(chp, ret_value);
/* if reset failed, there's nothing here */
if (ret_value == 0)
return (ENXIO);
/*
* 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.
*/
found = 0;
for (drive = 0; drive < 2; drive++) {
if ((ret_value & (0x01 << drive)) == 0)
continue;
return (0);
}
return (ENXIO);
}
/*
* Initialize the device.
*/
int
wdc_init(sc, unit)
struct wd_softc *sc;
u_int unit;
{
if (pciide_init(&sc->sc_channel, unit) != 0)
return (ENXIO);
if (wdcprobe(&sc->sc_channel) != 0)
return (ENXIO);
return (0);
}
/*
* Wait until the device is ready.
*/
int
wdc_wait_for_ready(chp)
struct wdc_channel *chp;
{
u_int timeout;
for (timeout = WDC_TIMEOUT; timeout > 0; --timeout) {
if ((WDC_READ_REG(chp, wd_status) & (WDCS_BSY | WDCS_DRDY))
== WDCS_DRDY)
return (0);
}
return (ENXIO);
}
/*
* Read one block off the device.
*/
int
wdc_read_block(sc, wd_c)
struct wd_softc *sc;
struct wdc_command *wd_c;
{
int i;
struct wdc_channel *chp = &sc->sc_channel;
u_int16_t *ptr = (u_int16_t*)wd_c->data;
if (ptr == NULL)
return (0);
for (i = wd_c->bcount; i > 0; i -= sizeof(u_int16_t))
*ptr++ = WDC_READ_DATA(chp);
return (0);
}
/*
* Send a command to the device (CHS and LBA addressing).
*/
int
wdccommand(wd, wd_c)
struct wd_softc *wd;
struct wdc_command *wd_c;
{
u_int8_t err;
struct wdc_channel *chp = &wd->sc_channel;
#if 0
DPRINTF(("wdccommand(%d, %d, %d, %d, %d, %d, %d)\n",
wd_c->drive, wd_c->r_command, wd_c->r_cyl,
wd_c->r_head, wd_c->r_sector, wd_c->bcount,
wd_c->r_precomp));
#endif
WDC_WRITE_REG(chp, wd_precomp, wd_c->r_precomp);
WDC_WRITE_REG(chp, wd_seccnt, wd_c->r_count);
WDC_WRITE_REG(chp, wd_sector, wd_c->r_sector);
WDC_WRITE_REG(chp, wd_cyl_lo, wd_c->r_cyl);
WDC_WRITE_REG(chp, wd_cyl_hi, wd_c->r_cyl >> 8);
WDC_WRITE_REG(chp, wd_sdh,
WDSD_IBM | (wd_c->drive << 4) | wd_c->r_head);
WDC_WRITE_REG(chp, wd_command, wd_c->r_command);
if (wdc_wait_for_ready(chp) != 0)
return (ENXIO);
if (WDC_READ_REG(chp, wd_status) & WDCS_ERR) {
DPRINTF(("wd%d: error %x\n", wd->sc_unit,
WDC_READ_REG(chp, wd_error)));
return (ENXIO);
}
return (0);
}
/*
* Send a command to the device (LBA48 addressing).
*/
int
wdccommandext(wd, wd_c)
struct wd_softc *wd;
struct wdc_command *wd_c;
{
u_int8_t err;
struct wdc_channel *chp = &wd->sc_channel;
/* Select drive, head, and addressing mode. */
WDC_WRITE_REG(chp, wd_sdh, (wd_c->drive << 4) | WDSD_LBA);
/* previous */
WDC_WRITE_REG(chp, wd_features, 0);
WDC_WRITE_REG(chp, wd_seccnt, wd_c->r_count >> 8);
WDC_WRITE_REG(chp, wd_lba_hi, wd_c->r_blkno >> 40);
WDC_WRITE_REG(chp, wd_lba_mi, wd_c->r_blkno >> 32);
WDC_WRITE_REG(chp, wd_lba_lo, wd_c->r_blkno >> 24);
/* current */
WDC_WRITE_REG(chp, wd_features, 0);
WDC_WRITE_REG(chp, wd_seccnt, wd_c->r_count);
WDC_WRITE_REG(chp, wd_lba_hi, wd_c->r_blkno >> 16);
WDC_WRITE_REG(chp, wd_lba_mi, wd_c->r_blkno >> 8);
WDC_WRITE_REG(chp, wd_lba_lo, wd_c->r_blkno);
/* Send command. */
WDC_WRITE_REG(chp, wd_command, wd_c->r_command);
if (wdc_wait_for_ready(chp) != 0)
return (ENXIO);
if (WDC_READ_REG(chp, wd_status) & WDCS_ERR) {
DPRINTF(("wd%d: error %x\n", wd->sc_unit,
WDC_READ_REG(chp, wd_error)));
return (ENXIO);
}
return (0);
}
/*
* Issue 'device identify' command.
*/
int
wdc_exec_identify(wd, data)
struct wd_softc *wd;
void *data;
{
int error;
struct wdc_command wd_c;
memset(&wd_c, 0, sizeof(wd_c));
wd_c.drive = wd->sc_drive;
wd_c.r_command = WDCC_IDENTIFY;
wd_c.bcount = DEV_BSIZE;
wd_c.data = data;
if ((error = wdccommand(wd, &wd_c)) != 0)
return (error);
return wdc_read_block(wd, &wd_c);
}
/*
* Issue 'read' command.
*/
int
wdc_exec_read(wd, cmd, blkno, data)
struct wd_softc *wd;
u_int8_t cmd;
daddr_t blkno;
void *data;
{
int error;
struct wdc_command wd_c;
memset(&wd_c, 0, sizeof(wd_c));
if (wd->sc_flags & WDF_LBA48) {
/* LBA48 */
wd_c.r_blkno = blkno;
} else if (wd->sc_flags & WDF_LBA) {
/* LBA */
wd_c.r_sector = (blkno >> 0) & 0xff;
wd_c.r_cyl = (blkno >> 8) & 0xffff;
wd_c.r_head = (blkno >> 24) & 0x0f;
wd_c.r_head |= WDSD_LBA;
} else {
/* LHS */
wd_c.r_sector = blkno % wd->sc_label.d_nsectors;
wd_c.r_sector++; /* Sectors begin with 1, not 0. */
blkno /= wd->sc_label.d_nsectors;
wd_c.r_head = blkno % wd->sc_label.d_ntracks;
blkno /= wd->sc_label.d_ntracks;
wd_c.r_cyl = blkno;
wd_c.r_head |= WDSD_CHS;
}
wd_c.data = data;
wd_c.r_count = 1;
wd_c.drive = wd->sc_drive;
wd_c.r_command = cmd;
wd_c.bcount = wd->sc_label.d_secsize;
if (wd->sc_flags & WDF_LBA48)
error = wdccommandext(wd, &wd_c);
else
error = wdccommand(wd, &wd_c);
if (error != 0)
return (error);
return wdc_read_block(wd, &wd_c);
}
|
