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02e7cf8f84
linux/drivers/ide/ide-cd.c
Tejun Heo 02e7cf8f84 ide-cd,atapi: use bio for internal commands 
Impact: unify request data buffer handling

rq->data is used mostly to pass kernel buffer through request queue
without using bio.  There are only a couple of places which still do
this in kernel and converting to bio isn't difficult.

This patch converts ide-cd and atapi to use bio instead of rq->data
for request sense and internal pc commands.  With previous change to
unify sense request handling, this is relatively easily achieved by
adding blk_rq_map_kern() during sense_rq prep and PC issue.

If blk_rq_map_kern() fails for sense, the error is deferred till sense
issue and aborts the failed command which triggered the sense.  Note
that this is a slim possibility as sense prep is done on each command
issue, so for the above condition to actually trigger, all preps since
the last sense issue till the issue of the request which would require
a sense should fail.

* do_request functions might sleep now.  This should be okay as ide
  request_fn - do_ide_request() - is invoked only from make_request
  and plug work.  Make sure this is the case by adding might_sleep()
  to do_ide_request().

* Functions which access the read sense data before the sense request
  is complete now should access bio_data(sense_rq->bio) as the sense
  buffer might have been copied during blk_rq_map_kern().

* ide-tape updated to map sg.

* cdrom_do_block_pc() now doesn't have to deal with REQ_TYPE_ATA_PC
  special case.  Simplified.

* tp_ops->output/input_data path dropped from ide_pc_intr().

Signed-off-by: Tejun Heo <tj@kernel.org>
2009-04-28 07:37:30 +02:00

1837 lines
46 KiB
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/*
* ATAPI CD-ROM driver.
*
* Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
* Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
* Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
* Copyright (C) 2005, 2007-2009 Bartlomiej Zolnierkiewicz
*
* May be copied or modified under the terms of the GNU General Public
* License. See linux/COPYING for more information.
*
* See Documentation/cdrom/ide-cd for usage information.
*
* Suggestions are welcome. Patches that work are more welcome though. ;-)
*
* Documentation:
* Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
*
* For historical changelog please see:
* Documentation/ide/ChangeLog.ide-cd.1994-2004
*/
#define DRV_NAME "ide-cd"
#define PFX DRV_NAME ": "
#define IDECD_VERSION "5.00"
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/errno.h>
#include <linux/cdrom.h>
#include <linux/ide.h>
#include <linux/completion.h>
#include <linux/mutex.h>
#include <linux/bcd.h>
/* For SCSI -> ATAPI command conversion */
#include <scsi/scsi.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <asm/byteorder.h>
#include <linux/uaccess.h>
#include <asm/unaligned.h>
#include "ide-cd.h"
static DEFINE_MUTEX(idecd_ref_mutex);
static void ide_cd_release(struct device *);
static struct cdrom_info *ide_cd_get(struct gendisk *disk)
{
struct cdrom_info *cd = NULL;
mutex_lock(&idecd_ref_mutex);
cd = ide_drv_g(disk, cdrom_info);
if (cd) {
if (ide_device_get(cd->drive))
cd = NULL;
else
get_device(&cd->dev);
}
mutex_unlock(&idecd_ref_mutex);
return cd;
}
static void ide_cd_put(struct cdrom_info *cd)
{
ide_drive_t *drive = cd->drive;
mutex_lock(&idecd_ref_mutex);
put_device(&cd->dev);
ide_device_put(drive);
mutex_unlock(&idecd_ref_mutex);
}
/*
* Generic packet command support and error handling routines.
*/
/* Mark that we've seen a media change and invalidate our internal buffers. */
static void cdrom_saw_media_change(ide_drive_t *drive)
{
drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
}
static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
struct request_sense *sense)
{
int log = 0;
ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
return 0;
switch (sense->sense_key) {
case NO_SENSE:
case RECOVERED_ERROR:
break;
case NOT_READY:
/*
* don't care about tray state messages for e.g. capacity
* commands or in-progress or becoming ready
*/
if (sense->asc == 0x3a || sense->asc == 0x04)
break;
log = 1;
break;
case ILLEGAL_REQUEST:
/*
* don't log START_STOP unit with LoEj set, since we cannot
* reliably check if drive can auto-close
*/
if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
break;
log = 1;
break;
case UNIT_ATTENTION:
/*
* Make good and sure we've seen this potential media change.
* Some drives (i.e. Creative) fail to present the correct sense
* key in the error register.
*/
cdrom_saw_media_change(drive);
break;
default:
log = 1;
break;
}
return log;
}
static void cdrom_analyze_sense_data(ide_drive_t *drive,
struct request *failed_command,
struct request_sense *sense)
{
unsigned long sector;
unsigned long bio_sectors;
struct cdrom_info *info = drive->driver_data;
ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
sense->error_code, sense->sense_key);
if (failed_command)
ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
failed_command->cmd[0]);
if (!cdrom_log_sense(drive, failed_command, sense))
return;
/*
* If a read toc is executed for a CD-R or CD-RW medium where the first
* toc has not been recorded yet, it will fail with 05/24/00 (which is a
* confusing error)
*/
if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
if (sense->sense_key == 0x05 && sense->asc == 0x24)
return;
/* current error */
if (sense->error_code == 0x70) {
switch (sense->sense_key) {
case MEDIUM_ERROR:
case VOLUME_OVERFLOW:
case ILLEGAL_REQUEST:
if (!sense->valid)
break;
if (failed_command == NULL ||
!blk_fs_request(failed_command))
break;
sector = (sense->information[0] << 24) |
(sense->information[1] << 16) |
(sense->information[2] << 8) |
(sense->information[3]);
if (drive->queue->hardsect_size == 2048)
/* device sector size is 2K */
sector <<= 2;
bio_sectors = max(bio_sectors(failed_command->bio), 4U);
sector &= ~(bio_sectors - 1);
/*
* The SCSI specification allows for the value
* returned by READ CAPACITY to be up to 75 2K
* sectors past the last readable block.
* Therefore, if we hit a medium error within the
* last 75 2K sectors, we decrease the saved size
* value.
*/
if (sector < get_capacity(info->disk) &&
drive->probed_capacity - sector < 4 * 75)
set_capacity(info->disk, sector);
}
}
ide_cd_log_error(drive->name, failed_command, sense);
}
static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
{
/*
* For REQ_TYPE_SENSE, "rq->special" points to the original
* failed request. Also, the sense data should be read
* directly from rq which might be different from the original
* sense buffer if it got copied during mapping.
*/
struct request *failed = (struct request *)rq->special;
void *sense = bio_data(rq->bio);
if (failed) {
if (failed->sense) {
/*
* Sense is always read into drive->sense_data.
* Copy back if the failed request has its
* sense pointer set.
*/
memcpy(failed->sense, sense, 18);
sense = failed->sense;
failed->sense_len = rq->sense_len;
}
cdrom_analyze_sense_data(drive, failed, sense);
if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
BUG();
} else
cdrom_analyze_sense_data(drive, NULL, sense);
}
/*
* Allow the drive 5 seconds to recover; some devices will return NOT_READY
* while flushing data from cache.
*
* returns: 0 failed (write timeout expired)
* 1 success
*/
static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
{
struct cdrom_info *info = drive->driver_data;
if (!rq->errors)
info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
rq->errors = 1;
if (time_after(jiffies, info->write_timeout))
return 0;
else {
struct request_queue *q = drive->queue;
unsigned long flags;
/*
* take a breather relying on the unplug timer to kick us again
*/
spin_lock_irqsave(q->queue_lock, flags);
blk_plug_device(q);
spin_unlock_irqrestore(q->queue_lock, flags);
return 1;
}
}
/**
* Returns:
* 0: if the request should be continued.
* 1: if the request will be going through error recovery.
* 2: if the request should be ended.
*/
static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
{
ide_hwif_t *hwif = drive->hwif;
struct request *rq = hwif->rq;
int err, sense_key, do_end_request = 0;
u8 quiet = rq->cmd_flags & REQ_QUIET;
/* get the IDE error register */
err = ide_read_error(drive);
sense_key = err >> 4;
ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
"stat 0x%x",
rq->cmd[0], rq->cmd_type, err, stat);
if (blk_sense_request(rq)) {
/*
* We got an error trying to get sense info from the drive
* (probably while trying to recover from a former error).
* Just give up.
*/
rq->cmd_flags |= REQ_FAILED;
return 2;
}
/* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
if (blk_pc_request(rq) && !rq->errors)
rq->errors = SAM_STAT_CHECK_CONDITION;
if (blk_noretry_request(rq))
do_end_request = 1;
switch (sense_key) {
case NOT_READY:
if (blk_fs_request(rq) && rq_data_dir(rq) == WRITE) {
if (ide_cd_breathe(drive, rq))
return 1;
} else {
cdrom_saw_media_change(drive);
if (blk_fs_request(rq) && !quiet)
printk(KERN_ERR PFX "%s: tray open\n",
drive->name);
}
do_end_request = 1;
break;
case UNIT_ATTENTION:
cdrom_saw_media_change(drive);
if (blk_fs_request(rq) == 0)
return 0;
/*
* Arrange to retry the request but be sure to give up if we've
* retried too many times.
*/
if (++rq->errors > ERROR_MAX)
do_end_request = 1;
break;
case ILLEGAL_REQUEST:
/*
* Don't print error message for this condition -- SFF8090i
* indicates that 5/24/00 is the correct response to a request
* to close the tray if the drive doesn't have that capability.
*
* cdrom_log_sense() knows this!
*/
if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
break;
/* fall-through */
case DATA_PROTECT:
/*
* No point in retrying after an illegal request or data
* protect error.
*/
if (!quiet)
ide_dump_status(drive, "command error", stat);
do_end_request = 1;
break;
case MEDIUM_ERROR:
/*
* No point in re-trying a zillion times on a bad sector.
* If we got here the error is not correctable.
*/
if (!quiet)
ide_dump_status(drive, "media error "
"(bad sector)", stat);
do_end_request = 1;
break;
case BLANK_CHECK:
/* disk appears blank? */
if (!quiet)
ide_dump_status(drive, "media error (blank)",
stat);
do_end_request = 1;
break;
default:
if (blk_fs_request(rq) == 0)
break;
if (err & ~ATA_ABORTED) {
/* go to the default handler for other errors */
ide_error(drive, "cdrom_decode_status", stat);
return 1;
} else if (++rq->errors > ERROR_MAX)
/* we've racked up too many retries, abort */
do_end_request = 1;
}
if (blk_fs_request(rq) == 0) {
rq->cmd_flags |= REQ_FAILED;
do_end_request = 1;
}
/*
* End a request through request sense analysis when we have sense data.
* We need this in order to perform end of media processing.
*/
if (do_end_request)
goto end_request;
/* if we got a CHECK_CONDITION status, queue a request sense command */
if (stat & ATA_ERR)
return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
return 1;
end_request:
if (stat & ATA_ERR) {
struct request_queue *q = drive->queue;
unsigned long flags;
spin_lock_irqsave(q->queue_lock, flags);
blkdev_dequeue_request(rq);
spin_unlock_irqrestore(q->queue_lock, flags);
hwif->rq = NULL;
return ide_queue_sense_rq(drive, rq) ? 2 : 1;
} else
return 2;
}
/*
* Check the contents of the interrupt reason register from the cdrom
* and attempt to recover if there are problems. Returns 0 if everything's
* ok; nonzero if the request has been terminated.
*/
static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
int len, int ireason, int rw)
{
ide_hwif_t *hwif = drive->hwif;
ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
/*
* ireason == 0: the drive wants to receive data from us
* ireason == 2: the drive is expecting to transfer data to us
*/
if (ireason == (!rw << 1))
return 0;
else if (ireason == (rw << 1)) {
/* whoops... */
printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
drive->name, __func__);
ide_pad_transfer(drive, rw, len);
} else if (rw == 0 && ireason == 1) {
/*
* Some drives (ASUS) seem to tell us that status info is
* available. Just get it and ignore.
*/
(void)hwif->tp_ops->read_status(hwif);
return 0;
} else {
/* drive wants a command packet, or invalid ireason... */
printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
drive->name, __func__, ireason);
}
if (rq->cmd_type == REQ_TYPE_ATA_PC)
rq->cmd_flags |= REQ_FAILED;
return -1;
}
static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
{
struct request *rq = cmd->rq;
ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
/*
* Some of the trailing request sense fields are optional,
* and some drives don't send them. Sigh.
*/
if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
cmd->nleft > 0 && cmd->nleft <= 5)
cmd->nleft = 0;
}
int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
int write, void *buffer, unsigned *bufflen,
struct request_sense *sense, int timeout,
unsigned int cmd_flags)
{
struct cdrom_info *info = drive->driver_data;
struct request_sense local_sense;
int retries = 10;
unsigned int flags = 0;
if (!sense)
sense = &local_sense;
ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
"cmd_flags: 0x%x",
cmd[0], write, timeout, cmd_flags);
/* start of retry loop */
do {
struct request *rq;
int error;
rq = blk_get_request(drive->queue, write, __GFP_WAIT);
memcpy(rq->cmd, cmd, BLK_MAX_CDB);
rq->cmd_type = REQ_TYPE_ATA_PC;
rq->sense = sense;
rq->cmd_flags |= cmd_flags;
rq->timeout = timeout;
if (buffer) {
error = blk_rq_map_kern(drive->queue, rq, buffer,
*bufflen, GFP_NOIO);
if (error) {
blk_put_request(rq);
return error;
}
}
error = blk_execute_rq(drive->queue, info->disk, rq, 0);
if (buffer)
*bufflen = rq->data_len;
flags = rq->cmd_flags;
blk_put_request(rq);
/*
* FIXME: we should probably abort/retry or something in case of
* failure.
*/
if (flags & REQ_FAILED) {
/*
* The request failed. Retry if it was due to a unit
* attention status (usually means media was changed).
*/
struct request_sense *reqbuf = sense;
if (reqbuf->sense_key == UNIT_ATTENTION)
cdrom_saw_media_change(drive);
else if (reqbuf->sense_key == NOT_READY &&
reqbuf->asc == 4 && reqbuf->ascq != 4) {
/*
* The drive is in the process of loading
* a disk. Retry, but wait a little to give
* the drive time to complete the load.
*/
ssleep(2);
} else {
/* otherwise, don't retry */
retries = 0;
}
--retries;
}
/* end of retry loop */
} while ((flags & REQ_FAILED) && retries >= 0);
/* return an error if the command failed */
return (flags & REQ_FAILED) ? -EIO : 0;
}
static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
{
unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
if (cmd->tf_flags & IDE_TFLAG_WRITE)
nr_bytes -= cmd->last_xfer_len;
if (nr_bytes > 0)
ide_complete_rq(drive, 0, nr_bytes);
}
static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
struct ide_cmd *cmd = &hwif->cmd;
struct request *rq = hwif->rq;
ide_expiry_t *expiry = NULL;
int dma_error = 0, dma, thislen, uptodate = 0;
int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0, nsectors;
int sense = blk_sense_request(rq);
unsigned int timeout;
u16 len;
u8 ireason, stat;
ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
/* check for errors */
dma = drive->dma;
if (dma) {
drive->dma = 0;
drive->waiting_for_dma = 0;
dma_error = hwif->dma_ops->dma_end(drive);
ide_dma_unmap_sg(drive, cmd);
if (dma_error) {
printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
write ? "write" : "read");
ide_dma_off(drive);
}
}
/* check status */
stat = hwif->tp_ops->read_status(hwif);
if (!OK_STAT(stat, 0, BAD_R_STAT)) {
rc = cdrom_decode_status(drive, stat);
if (rc) {
if (rc == 2)
goto out_end;
return ide_stopped;
}
}
/* using dma, transfer is complete now */
if (dma) {
if (dma_error)
return ide_error(drive, "dma error", stat);
uptodate = 1;
goto out_end;
}
ide_read_bcount_and_ireason(drive, &len, &ireason);
thislen = blk_fs_request(rq) ? len : cmd->nleft;
if (thislen > len)
thislen = len;
ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
stat, thislen);
/* If DRQ is clear, the command has completed. */
if ((stat & ATA_DRQ) == 0) {
if (blk_fs_request(rq)) {
/*
* If we're not done reading/writing, complain.
* Otherwise, complete the command normally.
*/
uptodate = 1;
if (cmd->nleft > 0) {
printk(KERN_ERR PFX "%s: %s: data underrun "
"(%u bytes)\n", drive->name, __func__,
cmd->nleft);
if (!write)
rq->cmd_flags |= REQ_FAILED;
uptodate = 0;
}
} else if (!blk_pc_request(rq)) {
ide_cd_request_sense_fixup(drive, cmd);
/* complain if we still have data left to transfer */
uptodate = cmd->nleft ? 0 : 1;
if (uptodate == 0)
rq->cmd_flags |= REQ_FAILED;
}
goto out_end;
}
/* check which way to transfer data */
rc = ide_cd_check_ireason(drive, rq, len, ireason, write);
if (rc)
goto out_end;
cmd->last_xfer_len = 0;
ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
"ireason: 0x%x",
rq->cmd_type, ireason);
/* transfer data */
while (thislen > 0) {
int blen = min_t(int, thislen, cmd->nleft);
if (cmd->nleft == 0)
break;
ide_pio_bytes(drive, cmd, write, blen);
cmd->last_xfer_len += blen;
thislen -= blen;
len -= blen;
if (sense && write == 0)
rq->sense_len += blen;
}
/* pad, if necessary */
if (len > 0) {
if (blk_fs_request(rq) == 0 || write == 0)
ide_pad_transfer(drive, write, len);
else {
printk(KERN_ERR PFX "%s: confused, missing data\n",
drive->name);
blk_dump_rq_flags(rq, "cdrom_newpc_intr");
}
}
if (blk_pc_request(rq)) {
timeout = rq->timeout;
} else {
timeout = ATAPI_WAIT_PC;
if (!blk_fs_request(rq))
expiry = ide_cd_expiry;
}
hwif->expiry = expiry;
ide_set_handler(drive, cdrom_newpc_intr, timeout);
return ide_started;
out_end:
if (blk_pc_request(rq) && rc == 0) {
unsigned int dlen = rq->data_len;
rq->data_len = 0;
if (blk_end_request(rq, 0, dlen))
BUG();
hwif->rq = NULL;
} else {
if (sense && uptodate)
ide_cd_complete_failed_rq(drive, rq);
if (blk_fs_request(rq)) {
if (cmd->nleft == 0)
uptodate = 1;
} else {
if (uptodate <= 0 && rq->errors == 0)
rq->errors = -EIO;
}
if (uptodate == 0)
ide_cd_error_cmd(drive, cmd);
/* make sure it's fully ended */
if (blk_pc_request(rq))
nsectors = (rq->data_len + 511) >> 9;
else
nsectors = rq->hard_nr_sectors;
if (nsectors == 0)
nsectors = 1;
if (blk_fs_request(rq) == 0) {
rq->data_len -= (cmd->nbytes - cmd->nleft);
if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
rq->data_len += cmd->last_xfer_len;
}
ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
if (sense && rc == 2)
ide_error(drive, "request sense failure", stat);
}
return ide_stopped;
}
static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
{
struct cdrom_info *cd = drive->driver_data;
struct request_queue *q = drive->queue;
int write = rq_data_dir(rq) == WRITE;
unsigned short sectors_per_frame =
queue_hardsect_size(q) >> SECTOR_BITS;
ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
"secs_per_frame: %u",
rq->cmd[0], rq->cmd_flags, sectors_per_frame);
if (write) {
/* disk has become write protected */
if (get_disk_ro(cd->disk))
return ide_stopped;
} else {
/*
* We may be retrying this request after an error. Fix up any
* weirdness which might be present in the request packet.
*/
q->prep_rq_fn(q, rq);
}
/* fs requests *must* be hardware frame aligned */
if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
(rq->sector & (sectors_per_frame - 1)))
return ide_stopped;
/* use DMA, if possible */
drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
if (write)
cd->devinfo.media_written = 1;
rq->timeout = ATAPI_WAIT_PC;
return ide_started;
}
static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
{
ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
rq->cmd[0], rq->cmd_type);
if (blk_pc_request(rq))
rq->cmd_flags |= REQ_QUIET;
else
rq->cmd_flags &= ~REQ_FAILED;
drive->dma = 0;
/* sg request */
if (rq->bio) {
struct request_queue *q = drive->queue;
char *buf = bio_data(rq->bio);
unsigned int alignment;
drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
/*
* check if dma is safe
*
* NOTE! The "len" and "addr" checks should possibly have
* separate masks.
*/
alignment = queue_dma_alignment(q) | q->dma_pad_mask;
if ((unsigned long)buf & alignment
|| rq->data_len & q->dma_pad_mask
|| object_is_on_stack(buf))
drive->dma = 0;
}
}
static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
sector_t block)
{
struct ide_cmd cmd;
int uptodate = 0, nsectors;
ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
rq->cmd[0], (unsigned long long)block);
if (drive->debug_mask & IDE_DBG_RQ)
blk_dump_rq_flags(rq, "ide_cd_do_request");
if (blk_fs_request(rq)) {
if (cdrom_start_rw(drive, rq) == ide_stopped)
goto out_end;
} else if (blk_sense_request(rq) || blk_pc_request(rq) ||
rq->cmd_type == REQ_TYPE_ATA_PC) {
if (!rq->timeout)
rq->timeout = ATAPI_WAIT_PC;
cdrom_do_block_pc(drive, rq);
} else if (blk_special_request(rq)) {
/* right now this can only be a reset... */
uptodate = 1;
goto out_end;
} else {
blk_dump_rq_flags(rq, DRV_NAME " bad flags");
if (rq->errors == 0)
rq->errors = -EIO;
goto out_end;
}
/* prepare sense request for this command */
ide_prep_sense(drive, rq);
memset(&cmd, 0, sizeof(cmd));
if (rq_data_dir(rq))
cmd.tf_flags |= IDE_TFLAG_WRITE;
cmd.rq = rq;
if (blk_fs_request(rq) || rq->data_len) {
ide_init_sg_cmd(&cmd, blk_fs_request(rq) ? (rq->nr_sectors << 9)
: rq->data_len);
ide_map_sg(drive, &cmd);
}
return ide_issue_pc(drive, &cmd);
out_end:
nsectors = rq->hard_nr_sectors;
if (nsectors == 0)
nsectors = 1;
ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
return ide_stopped;
}
/*
* Ioctl handling.
*
* Routines which queue packet commands take as a final argument a pointer to a
* request_sense struct. If execution of the command results in an error with a
* CHECK CONDITION status, this structure will be filled with the results of the
* subsequent request sense command. The pointer can also be NULL, in which case
* no sense information is returned.
*/
static void msf_from_bcd(struct atapi_msf *msf)
{
msf->minute = bcd2bin(msf->minute);
msf->second = bcd2bin(msf->second);
msf->frame = bcd2bin(msf->frame);
}
int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
{
struct cdrom_info *info = drive->driver_data;
struct cdrom_device_info *cdi = &info->devinfo;
unsigned char cmd[BLK_MAX_CDB];
ide_debug_log(IDE_DBG_FUNC, "enter");
memset(cmd, 0, BLK_MAX_CDB);
cmd[0] = GPCMD_TEST_UNIT_READY;
/*
* Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
* instead of supporting the LOAD_UNLOAD opcode.
*/
cmd[7] = cdi->sanyo_slot % 3;
return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
}
static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
unsigned long *sectors_per_frame,
struct request_sense *sense)
{
struct {
__be32 lba;
__be32 blocklen;
} capbuf;
int stat;
unsigned char cmd[BLK_MAX_CDB];
unsigned len = sizeof(capbuf);
u32 blocklen;
ide_debug_log(IDE_DBG_FUNC, "enter");
memset(cmd, 0, BLK_MAX_CDB);
cmd[0] = GPCMD_READ_CDVD_CAPACITY;
stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
REQ_QUIET);
if (stat)
return stat;
/*
* Sanity check the given block size
*/
blocklen = be32_to_cpu(capbuf.blocklen);
switch (blocklen) {
case 512:
case 1024:
case 2048:
case 4096:
break;
default:
printk(KERN_ERR PFX "%s: weird block size %u\n",
drive->name, blocklen);
printk(KERN_ERR PFX "%s: default to 2kb block size\n",
drive->name);
blocklen = 2048;
break;
}
*capacity = 1 + be32_to_cpu(capbuf.lba);
*sectors_per_frame = blocklen >> SECTOR_BITS;
ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
*capacity, *sectors_per_frame);
return 0;
}
static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
int format, char *buf, int buflen,
struct request_sense *sense)
{
unsigned char cmd[BLK_MAX_CDB];
ide_debug_log(IDE_DBG_FUNC, "enter");
memset(cmd, 0, BLK_MAX_CDB);
cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
cmd[6] = trackno;
cmd[7] = (buflen >> 8);
cmd[8] = (buflen & 0xff);
cmd[9] = (format << 6);
if (msf_flag)
cmd[1] = 2;
return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
}
/* Try to read the entire TOC for the disk into our internal buffer. */
int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
{
int stat, ntracks, i;
struct cdrom_info *info = drive->driver_data;
struct cdrom_device_info *cdi = &info->devinfo;
struct atapi_toc *toc = info->toc;
struct {
struct atapi_toc_header hdr;
struct atapi_toc_entry ent;
} ms_tmp;
long last_written;
unsigned long sectors_per_frame = SECTORS_PER_FRAME;
ide_debug_log(IDE_DBG_FUNC, "enter");
if (toc == NULL) {
/* try to allocate space */
toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
if (toc == NULL) {
printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
drive->name);
return -ENOMEM;
}
info->toc = toc;
}
/*
* Check to see if the existing data is still valid. If it is,
* just return.
*/
(void) cdrom_check_status(drive, sense);
if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
return 0;
/* try to get the total cdrom capacity and sector size */
stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
sense);
if (stat)
toc->capacity = 0x1fffff;
set_capacity(info->disk, toc->capacity * sectors_per_frame);
/* save a private copy of the TOC capacity for error handling */
drive->probed_capacity = toc->capacity * sectors_per_frame;
blk_queue_hardsect_size(drive->queue,
sectors_per_frame << SECTOR_BITS);
/* first read just the header, so we know how long the TOC is */
stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
sizeof(struct atapi_toc_header), sense);
if (stat)
return stat;
if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
}
ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
if (ntracks <= 0)
return -EIO;
if (ntracks > MAX_TRACKS)
ntracks = MAX_TRACKS;
/* now read the whole schmeer */
stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
(char *)&toc->hdr,
sizeof(struct atapi_toc_header) +
(ntracks + 1) *
sizeof(struct atapi_toc_entry), sense);
if (stat && toc->hdr.first_track > 1) {
/*
* Cds with CDI tracks only don't have any TOC entries, despite
* of this the returned values are
* first_track == last_track = number of CDI tracks + 1,
* so that this case is indistinguishable from the same layout
* plus an additional audio track. If we get an error for the
* regular case, we assume a CDI without additional audio
* tracks. In this case the readable TOC is empty (CDI tracks
* are not included) and only holds the Leadout entry.
*
* Heiko Eißfeldt.
*/
ntracks = 0;
stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
(char *)&toc->hdr,
sizeof(struct atapi_toc_header) +
(ntracks + 1) *
sizeof(struct atapi_toc_entry),
sense);
if (stat)
return stat;
if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
} else {
toc->hdr.first_track = CDROM_LEADOUT;
toc->hdr.last_track = CDROM_LEADOUT;
}
}
if (stat)
return stat;
toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
}
for (i = 0; i <= ntracks; i++) {
if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
toc->ent[i].track = bcd2bin(toc->ent[i].track);
msf_from_bcd(&toc->ent[i].addr.msf);
}
toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
toc->ent[i].addr.msf.second,
toc->ent[i].addr.msf.frame);
}
if (toc->hdr.first_track != CDROM_LEADOUT) {
/* read the multisession information */
stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
sizeof(ms_tmp), sense);
if (stat)
return stat;
toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
} else {
ms_tmp.hdr.last_track = CDROM_LEADOUT;
ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
}
if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
/* re-read multisession information using MSF format */
stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
sizeof(ms_tmp), sense);
if (stat)
return stat;
msf_from_bcd(&ms_tmp.ent.addr.msf);
toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
ms_tmp.ent.addr.msf.second,
ms_tmp.ent.addr.msf.frame);
}
toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
/* now try to get the total cdrom capacity */
stat = cdrom_get_last_written(cdi, &last_written);
if (!stat && (last_written > toc->capacity)) {
toc->capacity = last_written;
set_capacity(info->disk, toc->capacity * sectors_per_frame);
drive->probed_capacity = toc->capacity * sectors_per_frame;
}
/* Remember that we've read this stuff. */
drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
return 0;
}
int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
{
struct cdrom_info *info = drive->driver_data;
struct cdrom_device_info *cdi = &info->devinfo;
struct packet_command cgc;
int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
ide_debug_log(IDE_DBG_FUNC, "enter");
if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
do {
/* we seem to get stat=0x01,err=0x00 the first time (??) */
stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
if (!stat)
break;
} while (--attempts);
return stat;
}
void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
{
struct cdrom_info *cd = drive->driver_data;
u16 curspeed, maxspeed;
ide_debug_log(IDE_DBG_FUNC, "enter");
if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
} else {
curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
}
ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
curspeed, maxspeed);
cd->current_speed = (curspeed + (176/2)) / 176;
cd->max_speed = (maxspeed + (176/2)) / 176;
}
#define IDE_CD_CAPABILITIES \
(CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
static struct cdrom_device_ops ide_cdrom_dops = {
.open = ide_cdrom_open_real,
.release = ide_cdrom_release_real,
.drive_status = ide_cdrom_drive_status,
.media_changed = ide_cdrom_check_media_change_real,
.tray_move = ide_cdrom_tray_move,
.lock_door = ide_cdrom_lock_door,
.select_speed = ide_cdrom_select_speed,
.get_last_session = ide_cdrom_get_last_session,
.get_mcn = ide_cdrom_get_mcn,
.reset = ide_cdrom_reset,
.audio_ioctl = ide_cdrom_audio_ioctl,
.capability = IDE_CD_CAPABILITIES,
.generic_packet = ide_cdrom_packet,
};
static int ide_cdrom_register(ide_drive_t *drive, int nslots)
{
struct cdrom_info *info = drive->driver_data;
struct cdrom_device_info *devinfo = &info->devinfo;
ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
devinfo->ops = &ide_cdrom_dops;
devinfo->speed = info->current_speed;
devinfo->capacity = nslots;
devinfo->handle = drive;
strcpy(devinfo->name, drive->name);
if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
devinfo->mask |= CDC_SELECT_SPEED;
devinfo->disk = info->disk;
return register_cdrom(devinfo);
}
static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
{
struct cdrom_info *cd = drive->driver_data;
struct cdrom_device_info *cdi = &cd->devinfo;
u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
mechtype_t mechtype;
int nslots = 1;
ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
drive->media, drive->atapi_flags);
cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
CDC_MO_DRIVE | CDC_RAM);
if (drive->media == ide_optical) {
cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
drive->name);
return nslots;
}
if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
cdi->mask &= ~CDC_PLAY_AUDIO;
return nslots;
}
/*
* We have to cheat a little here. the packet will eventually be queued
* with ide_cdrom_packet(), which extracts the drive from cdi->handle.
* Since this device hasn't been registered with the Uniform layer yet,
* it can't do this. Same goes for cdi->ops.
*/
cdi->handle = drive;
cdi->ops = &ide_cdrom_dops;
if (ide_cdrom_get_capabilities(drive, buf))
return 0;
if ((buf[8 + 6] & 0x01) == 0)
drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
if (buf[8 + 6] & 0x08)
drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
if (buf[8 + 3] & 0x01)
cdi->mask &= ~CDC_CD_R;
if (buf[8 + 3] & 0x02)
cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
if (buf[8 + 2] & 0x38)
cdi->mask &= ~CDC_DVD;
if (buf[8 + 3] & 0x20)
cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
if (buf[8 + 3] & 0x10)
cdi->mask &= ~CDC_DVD_R;
if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
cdi->mask &= ~CDC_PLAY_AUDIO;
mechtype = buf[8 + 6] >> 5;
if (mechtype == mechtype_caddy ||
mechtype == mechtype_popup ||
(drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
cdi->mask |= CDC_CLOSE_TRAY;
if (cdi->sanyo_slot > 0) {
cdi->mask &= ~CDC_SELECT_DISC;
nslots = 3;
} else if (mechtype == mechtype_individual_changer ||
mechtype == mechtype_cartridge_changer) {
nslots = cdrom_number_of_slots(cdi);
if (nslots > 1)
cdi->mask &= ~CDC_SELECT_DISC;
}
ide_cdrom_update_speed(drive, buf);
printk(KERN_INFO PFX "%s: ATAPI", drive->name);
/* don't print speed if the drive reported 0 */
if (cd->max_speed)
printk(KERN_CONT " %dX", cd->max_speed);
printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
printk(KERN_CONT " DVD%s%s",
(cdi->mask & CDC_DVD_R) ? "" : "-R",
(cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
printk(KERN_CONT " CD%s%s",
(cdi->mask & CDC_CD_R) ? "" : "-R",
(cdi->mask & CDC_CD_RW) ? "" : "/RW");
if ((cdi->mask & CDC_SELECT_DISC) == 0)
printk(KERN_CONT " changer w/%d slots", nslots);
else
printk(KERN_CONT " drive");
printk(KERN_CONT ", %dkB Cache\n",
be16_to_cpup((__be16 *)&buf[8 + 12]));
return nslots;
}
/* standard prep_rq_fn that builds 10 byte cmds */
static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
{
int hard_sect = queue_hardsect_size(q);
long block = (long)rq->hard_sector / (hard_sect >> 9);
unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
memset(rq->cmd, 0, BLK_MAX_CDB);
if (rq_data_dir(rq) == READ)
rq->cmd[0] = GPCMD_READ_10;
else
rq->cmd[0] = GPCMD_WRITE_10;
/*
* fill in lba
*/
rq->cmd[2] = (block >> 24) & 0xff;
rq->cmd[3] = (block >> 16) & 0xff;
rq->cmd[4] = (block >> 8) & 0xff;
rq->cmd[5] = block & 0xff;
/*
* and transfer length
*/
rq->cmd[7] = (blocks >> 8) & 0xff;
rq->cmd[8] = blocks & 0xff;
rq->cmd_len = 10;
return BLKPREP_OK;
}
/*
* Most of the SCSI commands are supported directly by ATAPI devices.
* This transform handles the few exceptions.
*/
static int ide_cdrom_prep_pc(struct request *rq)
{
u8 *c = rq->cmd;
/* transform 6-byte read/write commands to the 10-byte version */
if (c[0] == READ_6 || c[0] == WRITE_6) {
c[8] = c[4];
c[5] = c[3];
c[4] = c[2];
c[3] = c[1] & 0x1f;
c[2] = 0;
c[1] &= 0xe0;
c[0] += (READ_10 - READ_6);
rq->cmd_len = 10;
return BLKPREP_OK;
}
/*
* it's silly to pretend we understand 6-byte sense commands, just
* reject with ILLEGAL_REQUEST and the caller should take the
* appropriate action
*/
if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
rq->errors = ILLEGAL_REQUEST;
return BLKPREP_KILL;
}
return BLKPREP_OK;
}
static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
{
if (blk_fs_request(rq))
return ide_cdrom_prep_fs(q, rq);
else if (blk_pc_request(rq))
return ide_cdrom_prep_pc(rq);
return 0;
}
struct cd_list_entry {
const char *id_model;
const char *id_firmware;
unsigned int cd_flags;
};
#ifdef CONFIG_IDE_PROC_FS
static sector_t ide_cdrom_capacity(ide_drive_t *drive)
{
unsigned long capacity, sectors_per_frame;
if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
return 0;
return capacity * sectors_per_frame;
}
static int proc_idecd_read_capacity(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
ide_drive_t *drive = data;
int len;
len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
}
static ide_proc_entry_t idecd_proc[] = {
{ "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
{ NULL, 0, NULL, NULL }
};
static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
{
return idecd_proc;
}
static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
{
return NULL;
}
#endif
static const struct cd_list_entry ide_cd_quirks_list[] = {
/* SCR-3231 doesn't support the SET_CD_SPEED command. */
{ "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
/* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
{ "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
IDE_AFLAG_PRE_ATAPI12, },
/* Vertos 300, some versions of this drive like to talk BCD. */
{ "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
/* Vertos 600 ESD. */
{ "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
/*
* Sanyo 3 CD changer uses a non-standard command for CD changing
* (by default standard ATAPI support for CD changers is used).
*/
{ "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
{ "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
{ "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
/* Stingray 8X CD-ROM. */
{ "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
/*
* ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
* mode sense page capabilities size, but older drives break.
*/
{ "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
{ "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
/* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
{ "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
/*
* Some drives used by Apple don't advertise audio play
* but they do support reading TOC & audio datas.
*/
{ "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
{ "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
{ "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
{ "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
{ "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
{ "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
{ "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
{ "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
{ NULL, NULL, 0 }
};
static unsigned int ide_cd_flags(u16 *id)
{
const struct cd_list_entry *cle = ide_cd_quirks_list;
while (cle->id_model) {
if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
(cle->id_firmware == NULL ||
strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
return cle->cd_flags;
cle++;
}
return 0;
}
static int ide_cdrom_setup(ide_drive_t *drive)
{
struct cdrom_info *cd = drive->driver_data;
struct cdrom_device_info *cdi = &cd->devinfo;
struct request_queue *q = drive->queue;
u16 *id = drive->id;
char *fw_rev = (char *)&id[ATA_ID_FW_REV];
int nslots;
ide_debug_log(IDE_DBG_PROBE, "enter");
blk_queue_prep_rq(q, ide_cdrom_prep_fn);
blk_queue_dma_alignment(q, 31);
blk_queue_update_dma_pad(q, 15);
q->unplug_delay = max((1 * HZ) / 1000, 1);
drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
fw_rev[4] == '1' && fw_rev[6] <= '2')
drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
IDE_AFLAG_TOCADDR_AS_BCD);
else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
fw_rev[4] == '1' && fw_rev[6] <= '2')
drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
/* 3 => use CD in slot 0 */
cdi->sanyo_slot = 3;
nslots = ide_cdrom_probe_capabilities(drive);
blk_queue_hardsect_size(q, CD_FRAMESIZE);
if (ide_cdrom_register(drive, nslots)) {
printk(KERN_ERR PFX "%s: %s failed to register device with the"
" cdrom driver.\n", drive->name, __func__);
cd->devinfo.handle = NULL;
return 1;
}
ide_proc_register_driver(drive, cd->driver);
return 0;
}
static void ide_cd_remove(ide_drive_t *drive)
{
struct cdrom_info *info = drive->driver_data;
ide_debug_log(IDE_DBG_FUNC, "enter");
ide_proc_unregister_driver(drive, info->driver);
device_del(&info->dev);
del_gendisk(info->disk);
mutex_lock(&idecd_ref_mutex);
put_device(&info->dev);
mutex_unlock(&idecd_ref_mutex);
}
static void ide_cd_release(struct device *dev)
{
struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
struct cdrom_device_info *devinfo = &info->devinfo;
ide_drive_t *drive = info->drive;
struct gendisk *g = info->disk;
ide_debug_log(IDE_DBG_FUNC, "enter");
kfree(info->toc);
if (devinfo->handle == drive)
unregister_cdrom(devinfo);
drive->driver_data = NULL;
blk_queue_prep_rq(drive->queue, NULL);
g->private_data = NULL;
put_disk(g);
kfree(info);
}
static int ide_cd_probe(ide_drive_t *);
static struct ide_driver ide_cdrom_driver = {
.gen_driver = {
.owner = THIS_MODULE,
.name = "ide-cdrom",
.bus = &ide_bus_type,
},
.probe = ide_cd_probe,
.remove = ide_cd_remove,
.version = IDECD_VERSION,
.do_request = ide_cd_do_request,
#ifdef CONFIG_IDE_PROC_FS
.proc_entries = ide_cd_proc_entries,
.proc_devsets = ide_cd_proc_devsets,
#endif
};
static int idecd_open(struct block_device *bdev, fmode_t mode)
{
struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
int rc = -ENOMEM;
if (!info)
return -ENXIO;
rc = cdrom_open(&info->devinfo, bdev, mode);
if (rc < 0)
ide_cd_put(info);
return rc;
}
static int idecd_release(struct gendisk *disk, fmode_t mode)
{
struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
cdrom_release(&info->devinfo, mode);
ide_cd_put(info);
return 0;
}
static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
{
struct packet_command cgc;
char buffer[16];
int stat;
char spindown;
if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
return -EFAULT;
init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
if (stat)
return stat;
buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
return cdrom_mode_select(cdi, &cgc);
}
static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
{
struct packet_command cgc;
char buffer[16];
int stat;
char spindown;
init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
if (stat)
return stat;
spindown = buffer[11] & 0x0f;
if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
return -EFAULT;
return 0;
}
static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
int err;
switch (cmd) {
case CDROMSETSPINDOWN:
return idecd_set_spindown(&info->devinfo, arg);
case CDROMGETSPINDOWN:
return idecd_get_spindown(&info->devinfo, arg);
default:
break;
}
err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
if (err == -EINVAL)
err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
return err;
}
static int idecd_media_changed(struct gendisk *disk)
{
struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
return cdrom_media_changed(&info->devinfo);
}
static int idecd_revalidate_disk(struct gendisk *disk)
{
struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
struct request_sense sense;
ide_cd_read_toc(info->drive, &sense);
return 0;
}
static struct block_device_operations idecd_ops = {
.owner = THIS_MODULE,
.open = idecd_open,
.release = idecd_release,
.locked_ioctl = idecd_ioctl,
.media_changed = idecd_media_changed,
.revalidate_disk = idecd_revalidate_disk
};
/* module options */
static unsigned long debug_mask;
module_param(debug_mask, ulong, 0644);
MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
static int ide_cd_probe(ide_drive_t *drive)
{
struct cdrom_info *info;
struct gendisk *g;
struct request_sense sense;
ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
drive->driver_req, drive->media);
if (!strstr("ide-cdrom", drive->driver_req))
goto failed;
if (drive->media != ide_cdrom && drive->media != ide_optical)
goto failed;
drive->debug_mask = debug_mask;
drive->irq_handler = cdrom_newpc_intr;
info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
if (info == NULL) {
printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
drive->name);
goto failed;
}
g = alloc_disk(1 << PARTN_BITS);
if (!g)
goto out_free_cd;
ide_init_disk(g, drive);
info->dev.parent = &drive->gendev;
info->dev.release = ide_cd_release;
dev_set_name(&info->dev, dev_name(&drive->gendev));
if (device_register(&info->dev))
goto out_free_disk;
info->drive = drive;
info->driver = &ide_cdrom_driver;
info->disk = g;
g->private_data = &info->driver;
drive->driver_data = info;
g->minors = 1;
g->driverfs_dev = &drive->gendev;
g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
if (ide_cdrom_setup(drive)) {
put_device(&info->dev);
goto failed;
}
ide_cd_read_toc(drive, &sense);
g->fops = &idecd_ops;
g->flags |= GENHD_FL_REMOVABLE;
add_disk(g);
return 0;
out_free_disk:
put_disk(g);
out_free_cd:
kfree(info);
failed:
return -ENODEV;
}
static void __exit ide_cdrom_exit(void)
{
driver_unregister(&ide_cdrom_driver.gen_driver);
}
static int __init ide_cdrom_init(void)
{
printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
return driver_register(&ide_cdrom_driver.gen_driver);
}
MODULE_ALIAS("ide:*m-cdrom*");
MODULE_ALIAS("ide-cd");
module_init(ide_cdrom_init);
module_exit(ide_cdrom_exit);
MODULE_LICENSE("GPL");
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