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freebsd-skq/sys/dev/ata/ata-lowlevel.c

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/*-
* Copyright (c) 1998 - 2003 Søren Schmidt <sos@FreeBSD.org>
* 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,
* without modification, immediately at the beginning of the file.
* 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. 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>
__FBSDID("$FreeBSD$");
#include "opt_ata.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ata.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/bus.h>
#include <sys/mutex.h>
#include <sys/taskqueue.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <dev/ata/ata-all.h>
/* prototypes */
static int ata_transaction(struct ata_request *);
static void ata_interrupt(void *);
static void ata_reset(struct ata_channel *);
static int ata_wait(struct ata_device *, u_int8_t);
static int ata_command(struct ata_device *, u_int8_t, u_int64_t, u_int16_t, u_int16_t);
static void ata_pio_read(struct ata_request *, int);
static void ata_pio_write(struct ata_request *, int);
/* local vars */
static int atadebug = 0;
/*
* low level ATA functions
*/
void
ata_generic_hw(struct ata_channel *ch)
{
ch->hw.reset = ata_reset;
ch->hw.transaction = ata_transaction;
ch->hw.interrupt = ata_interrupt;
}
/* must be called with ATA channel locked */
static int
ata_transaction(struct ata_request *request)
{
/* record the request as running */
request->device->channel->running = request;
/* disable ATAPI DMA writes if HW doesn't support it */
if (request->flags & (ATA_R_ATAPI | ATA_R_DMA | ATA_R_WRITE) &&
request->device->channel->flags & ATA_ATAPI_DMA_RO)
request->flags &= ~ATA_R_DMA;
switch (request->flags & (ATA_R_ATAPI | ATA_R_DMA)) {
/* ATA PIO data transfer and control commands */
default:
{
/* record command direction here as our request might be done later */
int write = (request->flags & ATA_R_WRITE);
/* issue command */
if (ata_command(request->device, request->u.ata.command,
request->u.ata.lba, request->u.ata.count,
request->u.ata.feature)) {
ata_prtdev(request->device, "error issueing PIO command\n");
request->result = EIO;
return ATA_OP_FINISHED;
}
/* if write command output the data */
if (write) {
if (ata_wait(request->device,
(ATA_S_READY | ATA_S_DSC | ATA_S_DRQ)) < 0) {
ata_prtdev(request->device,"timeout waiting for write DRQ");
request->result = EIO;
return ATA_OP_FINISHED;
}
ata_pio_write(request, request->transfersize);
}
}
/* return and wait for interrupt */
return ATA_OP_CONTINUES;
/* ATA DMA data transfer commands */
case ATA_R_DMA:
/* check sanity and setup DMA engine */
if (request->device->channel->dma->setup(request->device,
request->data,
request->bytecount)) {
ata_prtdev(request->device, "setting up DMA failed\n");
request->result = EIO;
return ATA_OP_FINISHED;
}
/* issue command */
if (ata_command(request->device, request->u.ata.command,
request->u.ata.lba, request->u.ata.count,
request->u.ata.feature)) {
ata_prtdev(request->device, "error issuing DMA command\n");
request->result = EIO;
return ATA_OP_FINISHED;
}
/* start DMA engine */
if (request->device->channel->dma->start(request->device->channel,
request->data,
request->bytecount,
request->flags & ATA_R_READ)) {
request->result = EIO;
return ATA_OP_FINISHED;
}
/* return and wait for interrupt */
return ATA_OP_CONTINUES;
/* ATAPI PIO commands */
case ATA_R_ATAPI:
/* is this just a POLL DSC command ? */
if (request->u.atapi.ccb[0] == ATAPI_POLL_DSC) {
ATA_IDX_OUTB(request->device->channel, ATA_DRIVE,
ATA_D_IBM | request->device->unit);
DELAY(10);
if (!(ATA_IDX_INB(request->device->channel, ATA_ALTSTAT)&ATA_S_DSC))
request->result = EBUSY;
return ATA_OP_FINISHED;
}
/* start ATAPI operation */
if (ata_command(request->device, ATA_PACKET_CMD,
request->transfersize << 8, 0, 0)) {
ata_prtdev(request->device, "error issuing ATA PACKET command\n");
request->result = EIO;
return ATA_OP_FINISHED;
}
/* command interrupt device ? just return and wait for interrupt */
if ((request->device->param->config & ATA_DRQ_MASK) == ATA_DRQ_INTR)
return ATA_OP_CONTINUES;
/* wait for ready to write ATAPI command block */
{
int timeout = 5000; /* might be less for fast devices */
while (timeout--) {
int reason = ATA_IDX_INB(request->device->channel, ATA_IREASON);
int status = ATA_IDX_INB(request->device->channel, ATA_STATUS);
if (((reason & (ATA_I_CMD | ATA_I_IN)) |
(status & (ATA_S_DRQ | ATA_S_BUSY))) == ATAPI_P_CMDOUT)
break;
DELAY(20);
}
if (timeout <= 0) {
ata_prtdev(request->device,
"timeout waiting for ATAPI ready\n");
request->result = EIO;
return ATA_OP_FINISHED;
}
}
/* this seems to be needed for some (slow) devices */
DELAY(10);
/* output actual command block */
ATA_IDX_OUTSW_STRM(request->device->channel, ATA_DATA,
(int16_t *)request->u.atapi.ccb,
(request->device->param->config & ATA_PROTO_MASK) ==
ATA_PROTO_ATAPI_12 ? 6 : 8);
/* return and wait for interrupt */
return ATA_OP_CONTINUES;
case ATA_R_ATAPI|ATA_R_DMA:
/* is this just a POLL DSC command ? */
if (request->u.atapi.ccb[0] == ATAPI_POLL_DSC) {
ATA_IDX_OUTB(request->device->channel, ATA_DRIVE,
ATA_D_IBM | request->device->unit);
DELAY(10);
if (!(ATA_IDX_INB(request->device->channel, ATA_ALTSTAT)&ATA_S_DSC))
request->result = EBUSY;
return ATA_OP_FINISHED;
}
/* check sanity and setup DMA engine */
if (request->device->channel->dma->setup(request->device,
request->data,
request->bytecount)) {
ata_prtdev(request->device, "setting up DMA failed\n");
request->result = EIO;
return ATA_OP_FINISHED;
}
/* start ATAPI operation */
if (ata_command(request->device, ATA_PACKET_CMD, 0, 0, ATA_F_DMA)) {
ata_prtdev(request->device, "error issuing ATAPI packet command\n");
request->result = EIO;
return ATA_OP_FINISHED;
}
/* wait for ready to write ATAPI command block */
{
int timeout = 5000; /* might be less for fast devices */
while (timeout--) {
int reason = ATA_IDX_INB(request->device->channel, ATA_IREASON);
int status = ATA_IDX_INB(request->device->channel, ATA_STATUS);
if (((reason & (ATA_I_CMD | ATA_I_IN)) |
(status & (ATA_S_DRQ | ATA_S_BUSY))) == ATAPI_P_CMDOUT)
break;
DELAY(20);
}
if (timeout <= 0) {
ata_prtdev(request->device,
"timeout waiting for ATAPI ready\n");
request->result = EIO;
return ATA_OP_FINISHED;
}
}
/* this seems to be needed for some (slow) devices */
DELAY(10);
/* output actual command block */
ATA_IDX_OUTSW_STRM(request->device->channel, ATA_DATA,
(int16_t *)request->u.atapi.ccb,
(request->device->param->config & ATA_PROTO_MASK) ==
ATA_PROTO_ATAPI_12 ? 6 : 8);
/* start DMA engine */
if (request->device->channel->dma->start(request->device->channel,
request->data,
request->bytecount,
request->flags & ATA_R_READ)) {
request->result = EIO;
return ATA_OP_FINISHED;
}
/* return and wait for interrupt */
return ATA_OP_CONTINUES;
}
}
static void
ata_interrupt(void *data)
{
struct ata_channel *ch = (struct ata_channel *)data;
struct ata_request *request = ch->running;
u_int8_t status;
int length;
/* if the channel is idle this interrupt is not for us (shared) */
if (ch->state == ATA_IDLE)
return;
/* if device is busy it didn't interrupt, ignore interrupt (shared) */
if (ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_BUSY) {
DELAY(100);
if (!(ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_DRQ))
return;
}
/* clear interrupt and get status */
status = ATA_IDX_INB(ch, ATA_STATUS);
/* if we dont have a running request shout and ignore this interrupt */
if (request == NULL) {
if (1 || bootverbose) {
printf("ata%d: spurious interrupt - ", device_get_unit(ch->dev));
if (request)
printf("request OK - ");
printf("status=0x%02x error=0x%02x reason=0x%02x\n",
status, ATA_IDX_INB(ch, ATA_ERROR),
ATA_IDX_INB(ch, ATA_IREASON));
}
return;
}
request->status = status;
switch (request->flags & (ATA_R_ATAPI | ATA_R_DMA)) {
/* ATA PIO data transfer and control commands */
default:
/* if we got an error we are done with the HW */
if (request->status & ATA_S_ERROR) {
request->error = ATA_IDX_INB(ch, ATA_ERROR);
break;
}
/* if read data get it */
if (request->flags & ATA_R_READ)
ata_pio_read(request, request->transfersize);
/* update how far we've gotten */
request->donecount += request->transfersize;
/* do we need a scoop more ? */
if (request->bytecount > request->donecount) {
/* set this transfer size according to HW capabilities */
request->transfersize =
min((request->bytecount - request->donecount),
request->transfersize);
/* if data write command, output the data */
if (request->flags & ATA_R_WRITE) {
/* if we get an error here we are done with the HW */
if (ata_wait(request->device,
(ATA_S_READY | ATA_S_DSC | ATA_S_DRQ)) < 0) {
ata_prtdev(request->device,"timeout waiting for write DRQ");
request->status = ATA_IDX_INB(ch, ATA_STATUS);
break;
}
else {
/* output data and return waiting for new interrupt */
ata_pio_write(request, request->transfersize);
return;
}
}
/* if data read command, return & wait for interrupt */
else if (request->flags & ATA_R_READ) {
return;
}
else
ata_prtdev(request->device,
"FAILURE - %s shouldn't loop on control cmd\n",
ata_cmd2str(request));
}
/* done with HW */
break;
/* ATA DMA data transfer commands */
case ATA_R_DMA:
/* stop DMA engine and get status */
request->dmastat = ch->dma->stop(ch);
/* did we get error or data */
if (request->status & ATA_S_ERROR)
request->error = ATA_IDX_INB(ch, ATA_ERROR);
else if (request->dmastat & ATA_BMSTAT_ERROR)
request->status |= ATA_S_ERROR;
else
request->donecount = request->bytecount;
/* done with HW */
break;
/* ATAPI PIO commands */
case ATA_R_ATAPI:
length = ATA_IDX_INB(ch, ATA_CYL_LSB)|(ATA_IDX_INB(ch, ATA_CYL_MSB)<<8);
switch ((ATA_IDX_INB(ch, ATA_IREASON) & (ATA_I_CMD | ATA_I_IN)) |
(request->status & ATA_S_DRQ)) {
case ATAPI_P_CMDOUT:
/* this seems to be needed for some (slow) devices */
DELAY(10);
if (!(request->status & ATA_S_DRQ)) {
ata_prtdev(request->device, "command interrupt without DRQ\n");
request->status = ATA_S_ERROR;
break;
}
ATA_IDX_OUTSW_STRM(ch, ATA_DATA, (int16_t *)request->u.atapi.ccb,
(request->device->param->config &
ATA_PROTO_MASK)== ATA_PROTO_ATAPI_12 ? 6 : 8);
/* return wait for interrupt */
return;
case ATAPI_P_WRITE:
if (request->flags & ATA_R_READ) {
request->status = ATA_S_ERROR;
ata_prtdev(request->device,
"%s trying to write on read buffer\n",
ata_cmd2str(request));
break;
}
ata_pio_write(request, length);
request->donecount += length;
/* set next transfer size according to HW capabilities */
request->transfersize = min((request->bytecount-request->donecount),
request->transfersize);
/* return wait for interrupt */
return;
case ATAPI_P_READ:
if (request->flags & ATA_R_WRITE) {
request->status = ATA_S_ERROR;
ata_prtdev(request->device,
"%s trying to read on write buffer\n",
ata_cmd2str(request));
break;
}
ata_pio_read(request, length);
request->donecount += length;
/* set next transfer size according to HW capabilities */
request->transfersize = min((request->bytecount-request->donecount),
request->transfersize);
/* return wait for interrupt */
return;
case ATAPI_P_DONEDRQ:
ata_prtdev(request->device,
"WARNING - %s DONEDRQ non conformant device\n",
ata_cmd2str(request));
if (request->flags & ATA_R_READ) {
ata_pio_read(request, length);
request->donecount += length;
}
else if (request->flags & ATA_R_WRITE) {
ata_pio_write(request, length);
request->donecount += length;
}
else
request->status = ATA_S_ERROR;
/* FALLTHROUGH */
case ATAPI_P_ABORT:
case ATAPI_P_DONE:
if (request->status & (ATA_S_ERROR | ATA_S_DWF))
request->error = ATA_IDX_INB(ch, ATA_ERROR);
break;
default:
ata_prtdev(request->device, "unknown transfer phase\n");
request->status = ATA_S_ERROR;
}
/* done with HW */
break;
/* ATAPI DMA commands */
case ATA_R_ATAPI|ATA_R_DMA:
/* stop the engine and get engine status */
request->dmastat = ch->dma->stop(ch);
/* did we get error or data */
if (request->status & (ATA_S_ERROR | ATA_S_DWF))
request->error = ATA_IDX_INB(ch, ATA_ERROR);
else if (request->dmastat & ATA_BMSTAT_ERROR)
request->status |= ATA_S_ERROR;
else
request->donecount = request->bytecount;
/* done with HW */
break;
}
ata_finish(request);
/* unlock the ATA HW for new work */
ch->running = NULL;
ATA_UNLOCK_CH(ch);
ch->locking(ch, ATA_LF_UNLOCK);
}
/* must be called with ATA channel locked */
static void
ata_reset(struct ata_channel *ch)
{
u_int8_t err, lsb, msb, ostat0, ostat1;
u_int8_t stat0 = 0, stat1 = 0;
int mask = 0, timeout;
/* do we have any signs of ATA/ATAPI HW being present ? */
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_MASTER);
DELAY(10);
ostat0 = ATA_IDX_INB(ch, ATA_STATUS);
if ((ostat0 & 0xf8) != 0xf8 && ostat0 != 0xa5) {
stat0 = ATA_S_BUSY;
mask |= 0x01;
}
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_SLAVE);
DELAY(10);
ostat1 = ATA_IDX_INB(ch, ATA_STATUS);
/* in some setups we dont want to test for a slave */
if (!(ch->flags & ATA_NO_SLAVE)) {
if ((ostat1 & 0xf8) != 0xf8 && ostat1 != 0xa5) {
stat1 = ATA_S_BUSY;
mask |= 0x02;
}
}
/* if nothing showed up no need to get any further */
/* SOS is that too strong?, we just might loose devices here XXX */
ch->devices = 0;
if (!mask)
return;
if (bootverbose)
ata_printf(ch, -1, "reset tp1 mask=%02x ostat0=%02x ostat1=%02x\n",
mask, ostat0, ostat1);
/* reset channel */
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_MASTER);
DELAY(10);
ATA_IDX_OUTB(ch, ATA_ALTSTAT, ATA_A_IDS | ATA_A_RESET);
DELAY(10000);
ATA_IDX_OUTB(ch, ATA_ALTSTAT, ATA_A_IDS);
DELAY(10000);
/* wait for BUSY to go inactive */
for (timeout = 0; timeout < 310; timeout++) {
if (stat0 & ATA_S_BUSY) {
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_MASTER);
DELAY(10);
err = ATA_IDX_INB(ch, ATA_ERROR);
lsb = ATA_IDX_INB(ch, ATA_CYL_LSB);
msb = ATA_IDX_INB(ch, ATA_CYL_MSB);
stat0 = ATA_IDX_INB(ch, ATA_STATUS);
if (bootverbose)
ata_printf(ch, ATA_MASTER,
"stat=0x%02x err=0x%02x lsb=0x%02x msb=0x%02x\n",
stat0, err, lsb, msb);
if (!(stat0 & ATA_S_BUSY)) {
if (err == ATA_E_ILI) {
if (stat0 & ATA_S_READY) {
ch->devices |= ATA_ATA_MASTER;
}
else if (lsb == ATAPI_MAGIC_LSB && msb == ATAPI_MAGIC_MSB) {
ch->devices |= ATA_ATAPI_MASTER;
}
}
else if (err == lsb && err == msb)
stat0 |= ATA_S_BUSY;
}
}
if (stat1 & ATA_S_BUSY) {
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_SLAVE);
DELAY(10);
err = ATA_IDX_INB(ch, ATA_ERROR);
lsb = ATA_IDX_INB(ch, ATA_CYL_LSB);
msb = ATA_IDX_INB(ch, ATA_CYL_MSB);
stat1 = ATA_IDX_INB(ch, ATA_STATUS);
if (bootverbose)
ata_printf(ch, ATA_SLAVE,
" stat=0x%02x err=0x%02x lsb=0x%02x msb=0x%02x\n",
stat1, err, lsb, msb);
if (!(stat1 & ATA_S_BUSY)) {
if (err == ATA_E_ILI) {
if (stat1 & ATA_S_READY) {
ch->devices |= ATA_ATA_SLAVE;
}
else if (lsb == ATAPI_MAGIC_LSB && msb == ATAPI_MAGIC_MSB) {
ch->devices |= ATA_ATAPI_SLAVE;
}
}
else if (err == lsb && err == msb)
stat1 |= ATA_S_BUSY;
}
}
if (mask == 0x01) /* wait for master only */
if (!(stat0 & ATA_S_BUSY) || (stat0 == 0xff && timeout > 20))
break;
if (mask == 0x02) /* wait for slave only */
if (!(stat1 & ATA_S_BUSY) || (stat1 == 0xff && timeout > 20))
break;
if (mask == 0x03) /* wait for both master & slave */
if ((!(stat0 & ATA_S_BUSY) || (stat0 == 0xff && timeout > 20)) &&
(!(stat1 & ATA_S_BUSY) || (stat1 == 0xff && timeout > 20)))
break;
DELAY(100000);
}
if (stat0 & ATA_S_BUSY)
mask &= ~0x01;
if (stat1 & ATA_S_BUSY)
mask &= ~0x02;
if (bootverbose)
ata_printf(ch, -1,
"reset tp2 mask=%02x stat0=%02x stat1=%02x devices=0x%b\n",
mask, stat0, stat1, ch->devices,
"\20\4ATAPI_SLAVE\3ATAPI_MASTER\2ATA_SLAVE\1ATA_MASTER");
#if 0
if (!mask)
return;
if (mask & 0x01 && ostat0 != 0x00 &&
!(ch->devices & (ATA_ATA_MASTER | ATA_ATAPI_MASTER))) {
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_MASTER);
DELAY(10);
ATA_IDX_OUTB(ch, ATA_ERROR, 0x58);
ATA_IDX_OUTB(ch, ATA_CYL_LSB, 0xa5);
err = ATA_IDX_INB(ch, ATA_ERROR);
lsb = ATA_IDX_INB(ch, ATA_CYL_LSB);
if (bootverbose)
ata_printf(ch, ATA_MASTER, "ATA err=0x%02x lsb=0x%02x\n", err, lsb);
if (err != 0x58 && lsb == 0xa5)
ch->devices |= ATA_ATA_MASTER;
}
if (mask & 0x02 && ostat1 != 0x00 &&
!(ch->devices & (ATA_ATA_SLAVE | ATA_ATAPI_SLAVE))) {
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_SLAVE);
DELAY(10);
ATA_IDX_OUTB(ch, ATA_ERROR, 0x58);
ATA_IDX_OUTB(ch, ATA_CYL_LSB, 0xa5);
err = ATA_IDX_INB(ch, ATA_ERROR);
lsb = ATA_IDX_INB(ch, ATA_CYL_LSB);
if (bootverbose)
ata_printf(ch, ATA_SLAVE, "ATA err=0x%02x lsb=0x%02x\n", err, lsb);
if (err != 0x58 && lsb == 0xa5)
ch->devices |= ATA_ATA_SLAVE;
}
if (bootverbose)
ata_printf(ch, -1, "reset tp3 devices=0x%b\n", ch->devices,
"\20\4ATAPI_SLAVE\3ATAPI_MASTER\2ATA_SLAVE\1ATA_MASTER");
#endif
}
static int
ata_wait(struct ata_device *atadev, u_int8_t mask)
{
int timeout = 0;
u_int8_t status;
DELAY(1);
while (timeout < 5000000) { /* timeout 5 secs */
status = ATA_IDX_INB(atadev->channel, ATA_STATUS);
/* if drive fails status, reselect the drive just to be sure */
if (status == 0xff) {
ata_prtdev(atadev, "WARNING no status, reselecting device\n");
ATA_IDX_OUTB(atadev->channel, ATA_DRIVE, ATA_D_IBM | atadev->unit);
DELAY(10);
status = ATA_IDX_INB(atadev->channel, ATA_STATUS);
if (status == 0xff)
return -1;
}
/* are we done ? */
if (!(status & ATA_S_BUSY))
break;
if (timeout > 1000) {
timeout += 1000;
DELAY(1000);
}
else {
timeout += 10;
DELAY(10);
}
}
if (timeout >= 5000000)
return -1;
if (!mask)
return (status & ATA_S_ERROR);
/* wait 50 msec for bits wanted. */
timeout = 5000;
while (timeout--) {
status = ATA_IDX_INB(atadev->channel, ATA_STATUS);
if ((status & mask) == mask)
return (status & ATA_S_ERROR);
DELAY (10);
}
return -1;
}
static int
ata_command(struct ata_device *atadev, u_int8_t command,
u_int64_t lba, u_int16_t count, u_int16_t feature)
{
if (atadebug)
ata_prtdev(atadev, "ata_command: addr=%04lx, command=%02x, "
"lba=%jd, count=%d, feature=%d\n",
rman_get_start(atadev->channel->r_io[ATA_DATA].res),
command, (intmax_t)lba, count, feature);
/* select device */
ATA_IDX_OUTB(atadev->channel, ATA_DRIVE, ATA_D_IBM | atadev->unit);
/* ready to issue command ? */
if (ata_wait(atadev, 0) < 0) {
ata_prtdev(atadev, "timeout sending command=%02x\n", command);
return -1;
}
/* enable interrupt */
ATA_IDX_OUTB(atadev->channel, ATA_ALTSTAT, ATA_A_4BIT);
/* only use 48bit addressing if needed (avoid bugs and overhead) */
if ((lba > 268435455 || count > 256) && atadev->param &&
atadev->param->support.command2 & ATA_SUPPORT_ADDRESS48) {
/* translate command into 48bit version */
switch (command) {
case ATA_READ:
command = ATA_READ48; break;
case ATA_READ_MUL:
command = ATA_READ_MUL48; break;
case ATA_READ_DMA:
command = ATA_READ_DMA48; break;
case ATA_READ_DMA_QUEUED:
command = ATA_READ_DMA_QUEUED48; break;
case ATA_WRITE:
command = ATA_WRITE48; break;
case ATA_WRITE_MUL:
command = ATA_WRITE_MUL48; break;
case ATA_WRITE_DMA:
command = ATA_WRITE_DMA48; break;
case ATA_WRITE_DMA_QUEUED:
command = ATA_WRITE_DMA_QUEUED48; break;
case ATA_FLUSHCACHE:
command = ATA_FLUSHCACHE48; break;
default:
ata_prtdev(atadev, "can't translate cmd to 48bit version\n");
return -1;
}
ATA_IDX_OUTB(atadev->channel, ATA_FEATURE, (feature>>8) & 0xff);
ATA_IDX_OUTB(atadev->channel, ATA_FEATURE, feature & 0xff);
ATA_IDX_OUTB(atadev->channel, ATA_COUNT, (count>>8) & 0xff);
ATA_IDX_OUTB(atadev->channel, ATA_COUNT, count & 0xff);
ATA_IDX_OUTB(atadev->channel, ATA_SECTOR, (lba>>24) & 0xff);
ATA_IDX_OUTB(atadev->channel, ATA_SECTOR, lba & 0xff);
ATA_IDX_OUTB(atadev->channel, ATA_CYL_LSB, (lba>>32) & 0xff);
ATA_IDX_OUTB(atadev->channel, ATA_CYL_LSB, (lba>>8) & 0xff);
ATA_IDX_OUTB(atadev->channel, ATA_CYL_MSB, (lba>>40) & 0xff);
ATA_IDX_OUTB(atadev->channel, ATA_CYL_MSB, (lba>>16) & 0xff);
ATA_IDX_OUTB(atadev->channel, ATA_DRIVE, ATA_D_LBA | atadev->unit);
atadev->channel->flags |= ATA_48BIT_ACTIVE;
}
else {
ATA_IDX_OUTB(atadev->channel, ATA_FEATURE, feature);
ATA_IDX_OUTB(atadev->channel, ATA_COUNT, count);
ATA_IDX_OUTB(atadev->channel, ATA_SECTOR, lba & 0xff);
ATA_IDX_OUTB(atadev->channel, ATA_CYL_LSB, (lba>>8) & 0xff);
ATA_IDX_OUTB(atadev->channel, ATA_CYL_MSB, (lba>>16) & 0xff);
if (atadev->flags & ATA_D_USE_CHS)
ATA_IDX_OUTB(atadev->channel, ATA_DRIVE,
ATA_D_IBM | atadev->unit | ((lba>>24) & 0xf));
else
ATA_IDX_OUTB(atadev->channel, ATA_DRIVE,
ATA_D_IBM | ATA_D_LBA | atadev->unit|((lba>>24)&0xf));
atadev->channel->flags &= ~ATA_48BIT_ACTIVE;
}
/* issue command to controller */
ATA_IDX_OUTB(atadev->channel, ATA_CMD, command);
return 0;
}
static void
ata_pio_read(struct ata_request *request, int length)
{
int size = min(request->transfersize, length);
struct ata_channel *ch = request->device->channel;
int resid;
if (ch->flags & ATA_USE_16BIT || (size % sizeof(int32_t)))
ATA_IDX_INSW_STRM(ch, ATA_DATA,
(void*)((uintptr_t)request->data+request->donecount),
size / sizeof(int16_t));
else
ATA_IDX_INSL_STRM(ch, ATA_DATA,
(void*)((uintptr_t)request->data+request->donecount),
size / sizeof(int32_t));
if (request->transfersize < length) {
ata_prtdev(request->device, "WARNING - %s read data overrun %d>%d\n",
ata_cmd2str(request), length, request->transfersize);
for (resid = request->transfersize; resid < length;
resid += sizeof(int16_t))
ATA_IDX_INW(ch, ATA_DATA);
}
}
static void
ata_pio_write(struct ata_request *request, int length)
{
int size = min(request->transfersize, length);
struct ata_channel *ch = request->device->channel;
int resid;
if (ch->flags & ATA_USE_16BIT || (size % sizeof(int32_t)))
ATA_IDX_OUTSW_STRM(ch, ATA_DATA,
(void*)((uintptr_t)request->data+request->donecount),
size / sizeof(int16_t));
else
ATA_IDX_OUTSL_STRM(ch, ATA_DATA,
(void*)((uintptr_t)request->data+request->donecount),
size / sizeof(int32_t));
if (request->transfersize < length) {
ata_prtdev(request->device, "WARNING - %s write data underrun %d>%d\n",
ata_cmd2str(request), length, request->transfersize);
for (resid = request->transfersize; resid < length;
resid += sizeof(int16_t))
ATA_IDX_OUTW(ch, ATA_DATA, 0);
}
}
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