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6667b30d15
freebsd-nq/sys/dev/ata/ata-lowlevel.c
Søren Schmidt 6667b30d15 Change the way ioctls are issue to ATA. 
The most prominent part is that its now possible to issue ata_requests
directly to say acd0, instead of going through the cumbersome /dev/ata
device.
2005-05-16 13:07:27 +00:00

818 lines
24 KiB
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/*-
* Copyright (c) 1998 - 2005 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/kernel.h>
#include <sys/endian.h>
#include <sys/ata.h>
#include <sys/conf.h>
#include <sys/ctype.h>
#include <sys/bus.h>
#include <sys/sema.h>
#include <sys/taskqueue.h>
#include <vm/uma.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <dev/ata/ata-all.h>
#include <dev/ata/ata-pci.h>
#include <ata_if.h>
/* prototypes */
static int ata_begin_transaction(struct ata_request *);
static int ata_end_transaction(struct ata_request *);
static int ata_wait(struct ata_channel *ch, struct ata_device *, u_int8_t);
static void ata_pio_read(struct ata_request *, int);
static void ata_pio_write(struct ata_request *, int);
/*
* low level ATA functions
*/
void
ata_generic_hw(device_t dev)
{
struct ata_channel *ch = device_get_softc(dev);
ch->hw.begin_transaction = ata_begin_transaction;
ch->hw.end_transaction = ata_end_transaction;
ch->hw.command = ata_generic_command;
}
/* must be called with ATA channel locked and state_mtx held */
static int
ata_begin_transaction(struct ata_request *request)
{
struct ata_channel *ch = device_get_softc(device_get_parent(request->dev));
struct ata_device *atadev = device_get_softc(request->dev);
int dummy;
ATA_DEBUG_RQ(request, "begin transaction");
/* disable ATAPI DMA writes if HW doesn't support it */
if ((ch->flags & ATA_ATAPI_DMA_RO) &&
((request->flags & (ATA_R_ATAPI | ATA_R_DMA | ATA_R_WRITE)) ==
(ATA_R_ATAPI | ATA_R_DMA | ATA_R_WRITE)))
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 gone later */
int write = (request->flags & ATA_R_WRITE);
/* issue command */
if (ch->hw.command(request)) {
device_printf(request->dev, "error issueing %s command\n",
ata_cmd2str(request));
request->result = EIO;
goto begin_finished;
}
/* device reset doesn't interrupt */
if (request->u.ata.command == ATA_DEVICE_RESET) {
int timeout = 1000000;
do {
DELAY(10);
request->status = ATA_IDX_INB(ch, ATA_STATUS);
} while (request->status & ATA_S_BUSY && timeout--);
if (request->status & ATA_S_ERROR)
request->error = ATA_IDX_INB(ch, ATA_ERROR);
goto begin_finished;
}
/* if write command output the data */
if (write) {
if (ata_wait(ch, atadev, (ATA_S_READY | ATA_S_DRQ)) < 0) {
device_printf(request->dev,"timeout waiting for write DRQ");
request->result = EIO;
goto begin_finished;
}
ata_pio_write(request, request->transfersize);
}
}
goto begin_continue;
/* ATA DMA data transfer commands */
case ATA_R_DMA:
/* check sanity, setup SG list and DMA engine */
if (ch->dma->load(ch->dev, request->data, request->bytecount,
request->flags & ATA_R_READ, ch->dma->sg, &dummy)) {
device_printf(request->dev, "setting up DMA failed\n");
request->result = EIO;
goto begin_finished;
}
/* issue command */
if (ch->hw.command(request)) {
device_printf(request->dev, "error issueing %s command\n",
ata_cmd2str(request));
request->result = EIO;
goto begin_finished;
}
/* start DMA engine */
if (ch->dma->start && ch->dma->start(request->dev)) {
device_printf(request->dev, "error starting DMA\n");
request->result = EIO;
goto begin_finished;
}
goto begin_continue;
/* 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(ch, ATA_DRIVE, ATA_D_IBM | atadev->unit);
DELAY(10);
if (!(ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_DSC))
request->result = EBUSY;
goto begin_finished;
}
/* start ATAPI operation */
if (ch->hw.command(request)) {
device_printf(request->dev, "error issuing ATA PACKET command\n");
request->result = EIO;
goto begin_finished;
}
goto begin_continue;
/* ATAPI DMA commands */
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(ch, ATA_DRIVE, ATA_D_IBM | atadev->unit);
DELAY(10);
if (!(ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_DSC))
request->result = EBUSY;
goto begin_finished;
}
/* check sanity, setup SG list and DMA engine */
if (ch->dma->load(ch->dev, request->data, request->bytecount,
request->flags & ATA_R_READ, ch->dma->sg, &dummy)) {
device_printf(request->dev, "setting up DMA failed\n");
request->result = EIO;
goto begin_finished;
}
/* start ATAPI operation */
if (ch->hw.command(request)) {
device_printf(request->dev, "error issuing ATA PACKET command\n");
request->result = EIO;
goto begin_finished;
}
/* start DMA engine */
if (ch->dma->start && ch->dma->start(request->dev)) {
request->result = EIO;
goto begin_finished;
}
goto begin_continue;
}
/* NOT REACHED */
printf("ata_begin_transaction OOPS!!!\n");
begin_finished:
if (ch->dma && ch->dma->flags & ATA_DMA_LOADED)
ch->dma->unload(ch->dev);
return ATA_OP_FINISHED;
begin_continue:
callout_reset(&request->callout, request->timeout * hz,
(timeout_t*)ata_timeout, request);
return ATA_OP_CONTINUES;
}
/* must be called with ATA channel locked and state_mtx held */
static int
ata_end_transaction(struct ata_request *request)
{
struct ata_channel *ch = device_get_softc(device_get_parent(request->dev));
struct ata_device *atadev = device_get_softc(request->dev);
int length;
ATA_DEBUG_RQ(request, "end transaction");
/* clear interrupt and get status */
request->status = ATA_IDX_INB(ch, ATA_STATUS);
switch (request->flags & (ATA_R_ATAPI | ATA_R_DMA | ATA_R_CONTROL)) {
/* ATA PIO data transfer and control commands */
default:
/* on timeouts we have no data or anything so just return */
if (request->flags & ATA_R_TIMEOUT)
goto end_finished;
/* on control commands read back registers to the request struct */
if (request->flags & ATA_R_CONTROL) {
if (atadev->flags & ATA_D_48BIT_ACTIVE) {
ATA_IDX_OUTB(ch, ATA_CONTROL, ATA_A_4BIT | ATA_A_HOB);
request->u.ata.count = (ATA_IDX_INB(ch, ATA_COUNT) << 8);
request->u.ata.lba =
((u_int64_t)(ATA_IDX_INB(ch, ATA_SECTOR)) << 24) |
((u_int64_t)(ATA_IDX_INB(ch, ATA_CYL_LSB)) << 32) |
((u_int64_t)(ATA_IDX_INB(ch, ATA_CYL_MSB)) << 40);
ATA_IDX_OUTB(ch, ATA_CONTROL, ATA_A_4BIT);
request->u.ata.count |= ATA_IDX_INB(ch, ATA_COUNT);
request->u.ata.lba |=
(ATA_IDX_INB(ch, ATA_SECTOR) |
(ATA_IDX_INB(ch, ATA_CYL_LSB) << 8) |
(ATA_IDX_INB(ch, ATA_CYL_MSB) << 16));
}
else {
request->u.ata.count = ATA_IDX_INB(ch, ATA_COUNT);
request->u.ata.lba = ATA_IDX_INB(ch, ATA_SECTOR) |
(ATA_IDX_INB(ch, ATA_CYL_LSB) << 8) |
(ATA_IDX_INB(ch, ATA_CYL_MSB) << 16) |
((ATA_IDX_INB(ch, ATA_DRIVE) & 0xf) << 24);
}
}
/* 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);
goto end_finished;
}
/* are we moving data ? */
if (request->flags & (ATA_R_READ | ATA_R_WRITE)) {
/* if read data get it */
if (request->flags & ATA_R_READ) {
if (ata_wait(ch, atadev, (ATA_S_READY | ATA_S_DRQ)) < 0) {
device_printf(request->dev, "timeout waiting for read DRQ");
request->result = EIO;
goto end_finished;
}
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(ch, atadev, (ATA_S_READY | ATA_S_DRQ)) < 0) {
device_printf(request->dev,
"timeout waiting for write DRQ");
request->status = ATA_IDX_INB(ch, ATA_STATUS);
goto end_finished;
}
/* output data and return waiting for new interrupt */
ata_pio_write(request, request->transfersize);
goto end_continue;
}
/* if data read command, return & wait for interrupt */
if (request->flags & ATA_R_READ)
goto end_continue;
}
}
/* done with HW */
goto end_finished;
/* ATA DMA data transfer commands */
case ATA_R_DMA:
/* stop DMA engine and get status */
if (ch->dma->stop)
request->dmastat = ch->dma->stop(request->dev);
/* 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 if (!(request->flags & ATA_R_TIMEOUT))
request->donecount = request->bytecount;
/* release SG list etc */
ch->dma->unload(ch->dev);
/* done with HW */
goto end_finished;
/* ATAPI PIO commands */
case ATA_R_ATAPI:
length = ATA_IDX_INB(ch, ATA_CYL_LSB)|(ATA_IDX_INB(ch, ATA_CYL_MSB)<<8);
/* on timeouts we have no data or anything so just return */
if (request->flags & ATA_R_TIMEOUT)
goto end_finished;
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)) {
device_printf(request->dev, "command interrupt without DRQ\n");
request->status = ATA_S_ERROR;
goto end_finished;
}
ATA_IDX_OUTSW_STRM(ch, ATA_DATA, (int16_t *)request->u.atapi.ccb,
(atadev->param.config &
ATA_PROTO_MASK)== ATA_PROTO_ATAPI_12 ? 6 : 8);
/* return wait for interrupt */
goto end_continue;
case ATAPI_P_WRITE:
if (request->flags & ATA_R_READ) {
request->status = ATA_S_ERROR;
device_printf(request->dev,
"%s trying to write on read buffer\n",
ata_cmd2str(request));
goto end_finished;
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 */
goto end_continue;
case ATAPI_P_READ:
if (request->flags & ATA_R_WRITE) {
request->status = ATA_S_ERROR;
device_printf(request->dev,
"%s trying to read on write buffer\n",
ata_cmd2str(request));
goto end_finished;
}
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 */
goto end_continue;
case ATAPI_P_DONEDRQ:
device_printf(request->dev,
"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);
goto end_finished;
default:
device_printf(request->dev, "unknown transfer phase\n");
request->status = ATA_S_ERROR;
}
/* done with HW */
goto end_finished;
/* ATAPI DMA commands */
case ATA_R_ATAPI|ATA_R_DMA:
/* stop DMA engine and get status */
if (ch->dma->stop)
request->dmastat = ch->dma->stop(request->dev);
/* 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 if (!(request->flags & ATA_R_TIMEOUT))
request->donecount = request->bytecount;
/* release SG list etc */
ch->dma->unload(ch->dev);
/* done with HW */
goto end_finished;
}
/* NOT REACHED */
printf("ata_end_transaction OOPS!!\n");
end_finished:
callout_stop(&request->callout);
return ATA_OP_FINISHED;
end_continue:
return ATA_OP_CONTINUES;
}
/* must be called with ATA channel locked */
void
ata_generic_reset(device_t dev)
{
struct ata_channel *ch = device_get_softc(dev);
u_int8_t ostat0 = 0, stat0 = 0, ostat1 = 0, stat1 = 0;
u_int8_t err = 0, lsb = 0, msb = 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_D_LBA | ATA_MASTER);
DELAY(10);
ostat0 = ATA_IDX_INB(ch, ATA_STATUS);
if ((ostat0 & 0xf8) != 0xf8 && ostat0 != 0xa5) {
stat0 = ATA_S_BUSY;
mask |= 0x01;
}
/* in some setups we dont want to test for a slave */
if (!(ch->flags & ATA_NO_SLAVE)) {
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_D_LBA | ATA_SLAVE);
DELAY(10);
ostat1 = ATA_IDX_INB(ch, ATA_STATUS);
if ((ostat1 & 0xf8) != 0xf8 && ostat1 != 0xa5) {
stat1 = ATA_S_BUSY;
mask |= 0x02;
}
}
if (bootverbose)
device_printf(dev, "reset tp1 mask=%02x ostat0=%02x ostat1=%02x\n",
mask, ostat0, ostat1);
/* if nothing showed up there is no need to get any further */
/* XXX SOS is that too strong?, we just might loose devices here */
ch->devices = 0;
if (!mask)
return;
/* reset (both) devices on this channel */
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_D_LBA | ATA_MASTER);
DELAY(10);
ATA_IDX_OUTB(ch, ATA_CONTROL, ATA_A_IDS | ATA_A_RESET);
ata_udelay(10000);
ATA_IDX_OUTB(ch, ATA_CONTROL, ATA_A_IDS);
ata_udelay(100000);
ATA_IDX_INB(ch, ATA_ERROR);
/* wait for BUSY to go inactive */
for (timeout = 0; timeout < 310; timeout++) {
if ((mask & 0x01) && (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)
device_printf(dev,
"stat0=0x%02x err=0x%02x lsb=0x%02x msb=0x%02x\n",
stat0, err, lsb, msb);
if (stat0 == err && lsb == err && msb == err &&
timeout > (stat0 & ATA_S_BUSY ? 100 : 10))
mask &= ~0x01;
if (!(stat0 & ATA_S_BUSY)) {
if ((err & 0x7f) == ATA_E_ILI) {
if (lsb == ATAPI_MAGIC_LSB && msb == ATAPI_MAGIC_MSB) {
ch->devices |= ATA_ATAPI_MASTER;
}
else if (stat0 & ATA_S_READY) {
ch->devices |= ATA_ATA_MASTER;
}
}
else if ((stat0 & 0x0f) && err == lsb && err == msb) {
stat0 |= ATA_S_BUSY;
}
}
}
if ((mask & 0x02) && (stat1 & ATA_S_BUSY) &&
!((mask & 0x01) && (stat0 & 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)
device_printf(dev,
"stat1=0x%02x err=0x%02x lsb=0x%02x msb=0x%02x\n",
stat1, err, lsb, msb);
if (stat1 == err && lsb == err && msb == err &&
timeout > (stat1 & ATA_S_BUSY ? 100 : 10))
mask &= ~0x02;
if (!(stat1 & ATA_S_BUSY)) {
if ((err & 0x7f) == ATA_E_ILI) {
if (lsb == ATAPI_MAGIC_LSB && msb == ATAPI_MAGIC_MSB) {
ch->devices |= ATA_ATAPI_SLAVE;
}
else if (stat1 & ATA_S_READY) {
ch->devices |= ATA_ATA_SLAVE;
}
}
else if ((stat1 & 0x0f) && err == lsb && err == msb) {
stat1 |= ATA_S_BUSY;
}
}
}
if (mask == 0x00) /* nothing to wait for */
break;
if (mask == 0x01) /* wait for master only */
if (!(stat0 & ATA_S_BUSY) || (stat0 == 0xff && timeout > 10))
break;
if (mask == 0x02) /* wait for slave only */
if (!(stat1 & ATA_S_BUSY) || (stat1 == 0xff && timeout > 10))
break;
if (mask == 0x03) { /* wait for both master & slave */
if (!(stat0 & ATA_S_BUSY) && !(stat1 & ATA_S_BUSY))
break;
if ((stat0 == 0xff) && (timeout > 20))
mask &= ~0x01;
if ((stat1 == 0xff) && (timeout > 20))
mask &= ~0x02;
}
ata_udelay(100000);
}
if (bootverbose)
device_printf(dev, "reset tp2 stat0=%02x stat1=%02x devices=0x%b\n",
stat0, stat1, ch->devices,
"\20\4ATAPI_SLAVE\3ATAPI_MASTER\2ATA_SLAVE\1ATA_MASTER");
}
static int
ata_wait(struct ata_channel *ch, struct ata_device *atadev, u_int8_t mask)
{
u_int8_t status;
int timeout = 0;
DELAY(1);
/* wait at max 1 second for device to get !BUSY */
while (timeout < 1000000) {
status = ATA_IDX_INB(ch, ATA_ALTSTAT);
/* if drive fails status, reselect the drive and try again */
if (status == 0xff) {
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | atadev->unit);
timeout += 1000;
DELAY(1000);
continue;
}
/* are we done ? */
if (!(status & ATA_S_BUSY))
break;
if (timeout > 1000) {
timeout += 1000;
DELAY(1000);
}
else {
timeout += 10;
DELAY(10);
}
}
if (timeout >= 1000000)
return -2;
if (!mask)
return (status & ATA_S_ERROR);
DELAY(1);
/* wait 50 msec for bits wanted */
timeout = 5000;
while (timeout--) {
status = ATA_IDX_INB(ch, ATA_ALTSTAT);
if ((status & mask) == mask)
return (status & ATA_S_ERROR);
DELAY(10);
}
return -3;
}
int
ata_generic_command(struct ata_request *request)
{
struct ata_channel *ch = device_get_softc(device_get_parent(request->dev));
struct ata_device *atadev = device_get_softc(request->dev);
/* select device */
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | ATA_D_LBA | atadev->unit);
/* ready to issue command ? */
if (ata_wait(ch, atadev, 0) < 0) {
device_printf(request->dev, "timeout waiting to issue command\n");
return -1;
}
/* enable interrupt */
ATA_IDX_OUTB(ch, ATA_CONTROL, ATA_A_4BIT);
if (request->flags & ATA_R_ATAPI) {
int timeout = 5000;
/* issue packet command to controller */
if (request->flags & ATA_R_DMA) {
ATA_IDX_OUTB(ch, ATA_FEATURE, ATA_F_DMA);
ATA_IDX_OUTB(ch, ATA_CYL_LSB, 0);
ATA_IDX_OUTB(ch, ATA_CYL_MSB, 0);
}
else {
ATA_IDX_OUTB(ch, ATA_FEATURE, 0);
ATA_IDX_OUTB(ch, ATA_CYL_LSB, request->transfersize);
ATA_IDX_OUTB(ch, ATA_CYL_MSB, request->transfersize >> 8);
}
ATA_IDX_OUTB(ch, ATA_COMMAND, ATA_PACKET_CMD);
/* command interrupt device ? just return and wait for interrupt */
if ((atadev->param.config & ATA_DRQ_MASK) == ATA_DRQ_INTR)
return 0;
/* wait for ready to write ATAPI command block */
while (timeout--) {
int reason = ATA_IDX_INB(ch, ATA_IREASON);
int status = ATA_IDX_INB(ch, 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) {
device_printf(request->dev,"timeout waiting for ATAPI ready\n");
request->result = EIO;
return -1;
}
/* this seems to be needed for some (slow) devices */
DELAY(10);
/* output command block */
ATA_IDX_OUTSW_STRM(ch, ATA_DATA, (int16_t *)request->u.atapi.ccb,
(atadev->param.config & ATA_PROTO_MASK) ==
ATA_PROTO_ATAPI_12 ? 6 : 8);
}
else {
u_int8_t command = ata_modify_if_48bit(request);
if (atadev->flags & ATA_D_48BIT_ACTIVE) {
ATA_IDX_OUTB(ch, ATA_FEATURE, request->u.ata.feature >> 8);
ATA_IDX_OUTB(ch, ATA_FEATURE, request->u.ata.feature);
ATA_IDX_OUTB(ch, ATA_COUNT, request->u.ata.count >> 8);
ATA_IDX_OUTB(ch, ATA_COUNT, request->u.ata.count);
ATA_IDX_OUTB(ch, ATA_SECTOR, request->u.ata.lba >> 24);
ATA_IDX_OUTB(ch, ATA_SECTOR, request->u.ata.lba);
ATA_IDX_OUTB(ch, ATA_CYL_LSB, request->u.ata.lba >> 32);
ATA_IDX_OUTB(ch, ATA_CYL_LSB, request->u.ata.lba >> 8);
ATA_IDX_OUTB(ch, ATA_CYL_MSB, request->u.ata.lba >> 40);
ATA_IDX_OUTB(ch, ATA_CYL_MSB, request->u.ata.lba >> 16);
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_LBA | atadev->unit);
}
else {
command = request->u.ata.command;
ATA_IDX_OUTB(ch, ATA_FEATURE, request->u.ata.feature);
ATA_IDX_OUTB(ch, ATA_COUNT, request->u.ata.count);
if (atadev->flags & ATA_D_USE_CHS) {
int heads, sectors;
if (atadev->param.atavalid & ATA_FLAG_54_58) {
heads = atadev->param.current_heads;
sectors = atadev->param.current_sectors;
}
else {
heads = atadev->param.heads;
sectors = atadev->param.sectors;
}
ATA_IDX_OUTB(ch, ATA_SECTOR, (request->u.ata.lba % sectors)+1);
ATA_IDX_OUTB(ch, ATA_CYL_LSB,
(request->u.ata.lba / (sectors * heads)));
ATA_IDX_OUTB(ch, ATA_CYL_MSB,
(request->u.ata.lba / (sectors * heads)) >> 8);
ATA_IDX_OUTB(ch, ATA_DRIVE, ATA_D_IBM | atadev->unit |
(((request->u.ata.lba% (sectors * heads)) /
sectors) & 0xf));
}
else {
ATA_IDX_OUTB(ch, ATA_SECTOR, request->u.ata.lba);
ATA_IDX_OUTB(ch, ATA_CYL_LSB, request->u.ata.lba >> 8);
ATA_IDX_OUTB(ch, ATA_CYL_MSB, request->u.ata.lba >> 16);
ATA_IDX_OUTB(ch, ATA_DRIVE,
ATA_D_IBM | ATA_D_LBA | atadev->unit |
((request->u.ata.lba >> 24) & 0x0f));
}
}
/* issue command to controller */
ATA_IDX_OUTB(ch, ATA_COMMAND, command);
}
return 0;
}
static void
ata_pio_read(struct ata_request *request, int length)
{
struct ata_channel *ch = device_get_softc(device_get_parent(request->dev));
int size = min(request->transfersize, length);
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) {
device_printf(request->dev, "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)
{
struct ata_channel *ch = device_get_softc(device_get_parent(request->dev));
int size = min(request->transfersize, length);
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) {
device_printf(request->dev, "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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