NetBSD/sys/dev/ata/ata.c

198 lines
5.9 KiB
C

/* $NetBSD: ata.c,v 1.17 2002/04/09 21:17:53 bouyer Exp $ */
/*
* Copyright (c) 1998, 2001 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ata.c,v 1.17 2002/04/09 21:17:53 bouyer Exp $");
#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/malloc.h>
#include <sys/device.h>
#include <sys/syslog.h>
#include <machine/intr.h>
#include <machine/bus.h>
#include <dev/ata/atareg.h>
#include <dev/ata/atavar.h>
#include <dev/ic/wdcreg.h>
#include <dev/ic/wdcvar.h>
#define DEBUG_FUNCS 0x08
#define DEBUG_PROBE 0x10
#ifdef WDCDEBUG
extern int wdcdebug_mask; /* init'ed in wdc.c */
#define WDCDEBUG_PRINT(args, level) \
if (wdcdebug_mask & (level)) \
printf args
#else
#define WDCDEBUG_PRINT(args, level)
#endif
/* Get the disk's parameters */
int
ata_get_params(drvp, flags, prms)
struct ata_drive_datas *drvp;
u_int8_t flags;
struct ataparams *prms;
{
char tb[DEV_BSIZE];
struct wdc_command wdc_c;
#if BYTE_ORDER == LITTLE_ENDIAN
int i;
u_int16_t *p;
#endif
WDCDEBUG_PRINT(("wdc_ata_get_parms\n"), DEBUG_FUNCS);
memset(tb, 0, DEV_BSIZE);
memset(prms, 0, sizeof(struct ataparams));
memset(&wdc_c, 0, sizeof(struct wdc_command));
if (drvp->drive_flags & DRIVE_ATA) {
wdc_c.r_command = WDCC_IDENTIFY;
wdc_c.r_st_bmask = WDCS_DRDY;
wdc_c.r_st_pmask = WDCS_DRQ;
wdc_c.timeout = 1000; /* 1s */
} else if (drvp->drive_flags & DRIVE_ATAPI) {
wdc_c.r_command = ATAPI_IDENTIFY_DEVICE;
wdc_c.r_st_bmask = 0;
wdc_c.r_st_pmask = WDCS_DRQ;
wdc_c.timeout = 10000; /* 10s */
} else {
WDCDEBUG_PRINT(("wdc_ata_get_parms: no disks\n"),
DEBUG_FUNCS|DEBUG_PROBE);
return CMD_ERR;
}
wdc_c.flags = AT_READ | flags;
wdc_c.data = tb;
wdc_c.bcount = DEV_BSIZE;
if (wdc_exec_command(drvp, &wdc_c) != WDC_COMPLETE) {
WDCDEBUG_PRINT(("wdc_ata_get_parms: wdc_exec_command failed\n"),
DEBUG_FUNCS|DEBUG_PROBE);
return CMD_AGAIN;
}
if (wdc_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) {
WDCDEBUG_PRINT(("wdc_ata_get_parms: wdc_c.flags=0x%x\n",
wdc_c.flags), DEBUG_FUNCS|DEBUG_PROBE);
return CMD_ERR;
} else {
/* if we didn't read any data something is wrong */
if ((wdc_c.flags & AT_XFDONE) == 0)
return CMD_ERR;
/* Read in parameter block. */
memcpy(prms, tb, sizeof(struct ataparams));
#if BYTE_ORDER == LITTLE_ENDIAN
/*
* Shuffle string byte order.
* ATAPI Mitsumi and NEC drives don't need this.
*/
if ((prms->atap_config & WDC_CFG_ATAPI_MASK) ==
WDC_CFG_ATAPI &&
((prms->atap_model[0] == 'N' &&
prms->atap_model[1] == 'E') ||
(prms->atap_model[0] == 'F' &&
prms->atap_model[1] == 'X')))
return 0;
for (i = 0; i < sizeof(prms->atap_model); i += 2) {
p = (u_short *)(prms->atap_model + i);
*p = ntohs(*p);
}
for (i = 0; i < sizeof(prms->atap_serial); i += 2) {
p = (u_short *)(prms->atap_serial + i);
*p = ntohs(*p);
}
for (i = 0; i < sizeof(prms->atap_revision); i += 2) {
p = (u_short *)(prms->atap_revision + i);
*p = ntohs(*p);
}
#endif
return CMD_OK;
}
}
int
ata_set_mode(drvp, mode, flags)
struct ata_drive_datas *drvp;
u_int8_t mode;
u_int8_t flags;
{
struct wdc_command wdc_c;
WDCDEBUG_PRINT(("wdc_ata_set_mode=0x%x\n", mode), DEBUG_FUNCS);
memset(&wdc_c, 0, sizeof(struct wdc_command));
wdc_c.r_command = SET_FEATURES;
wdc_c.r_st_bmask = 0;
wdc_c.r_st_pmask = 0;
wdc_c.r_precomp = WDSF_SET_MODE;
wdc_c.r_count = mode;
wdc_c.flags = AT_READ | flags;
wdc_c.timeout = 1000; /* 1s */
if (wdc_exec_command(drvp, &wdc_c) != WDC_COMPLETE)
return CMD_AGAIN;
if (wdc_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) {
return CMD_ERR;
}
return CMD_OK;
}
void
ata_dmaerr(drvp)
struct ata_drive_datas *drvp;
{
/*
* Downgrade decision: if we get NERRS_MAX in NXFER.
* We start with n_dmaerrs set to NERRS_MAX-1 so that the
* first error within the first NXFER ops will immediatly trigger
* a downgrade.
* If we got an error and n_xfers is bigger than NXFER reset counters.
*/
drvp->n_dmaerrs++;
if (drvp->n_dmaerrs >= NERRS_MAX && drvp->n_xfers <= NXFER) {
wdc_downgrade_mode(drvp);
drvp->n_dmaerrs = NERRS_MAX-1;
drvp->n_xfers = 0;
return;
}
if (drvp->n_xfers > NXFER) {
drvp->n_dmaerrs = 1; /* just got an error */
drvp->n_xfers = 1; /* restart counting from this error */
}
}