| /* |
| * 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 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. ;-) |
| * For those wishing to work on this driver, please be sure you download |
| * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI |
| * (SFF-8020i rev 2.6) standards. These documents can be obtained by |
| * anonymous ftp from: |
| * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps |
| * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf |
| * |
| * 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 kref *); |
| |
| 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 |
| kref_get(&cd->kref); |
| |
| } |
| 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); |
| kref_put(&cd->kref, ide_cd_release); |
| 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, "Call %s, sense_key: 0x%x\n", __func__, |
| 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, "Call %s, error_code: 0x%x, " |
| "sense_key: 0x%x\n", __func__, sense->error_code, |
| sense->sense_key); |
| |
| if (failed_command) |
| ide_debug_log(IDE_DBG_SENSE, "%s: failed cmd: 0x%x\n", |
| __func__, 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 cdrom_queue_request_sense(ide_drive_t *drive, void *sense, |
| struct request *failed_command) |
| { |
| struct cdrom_info *info = drive->driver_data; |
| struct request *rq = &info->request_sense_request; |
| |
| ide_debug_log(IDE_DBG_SENSE, "Call %s\n", __func__); |
| |
| if (sense == NULL) |
| sense = &info->sense_data; |
| |
| /* stuff the sense request in front of our current request */ |
| blk_rq_init(NULL, rq); |
| rq->cmd_type = REQ_TYPE_ATA_PC; |
| rq->rq_disk = info->disk; |
| |
| rq->data = sense; |
| rq->cmd[0] = GPCMD_REQUEST_SENSE; |
| rq->cmd[4] = 18; |
| rq->data_len = 18; |
| |
| rq->cmd_type = REQ_TYPE_SENSE; |
| rq->cmd_flags |= REQ_PREEMPT; |
| |
| /* NOTE! Save the failed command in "rq->buffer" */ |
| rq->buffer = (void *) failed_command; |
| |
| if (failed_command) |
| ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x\n", |
| failed_command->cmd[0]); |
| |
| ide_do_drive_cmd(drive, rq); |
| } |
| |
| static void cdrom_end_request(ide_drive_t *drive, int uptodate) |
| { |
| struct request *rq = drive->hwif->rq; |
| int nsectors = rq->hard_cur_sectors; |
| |
| ide_debug_log(IDE_DBG_FUNC, "Call %s, cmd: 0x%x, uptodate: 0x%x, " |
| "nsectors: %d\n", __func__, rq->cmd[0], uptodate, |
| nsectors); |
| |
| if (blk_sense_request(rq) && uptodate) { |
| /* |
| * For REQ_TYPE_SENSE, "rq->buffer" points to the original |
| * failed request |
| */ |
| struct request *failed = (struct request *) rq->buffer; |
| struct cdrom_info *info = drive->driver_data; |
| void *sense = &info->sense_data; |
| |
| if (failed) { |
| if (failed->sense) { |
| sense = failed->sense; |
| failed->sense_len = rq->sense_len; |
| } |
| cdrom_analyze_sense_data(drive, failed, sense); |
| /* |
| * now end the failed request |
| */ |
| if (blk_fs_request(failed)) { |
| if (ide_end_dequeued_request(drive, failed, 0, |
| failed->hard_nr_sectors)) |
| BUG(); |
| } else { |
| if (blk_end_request(failed, -EIO, |
| failed->data_len)) |
| BUG(); |
| } |
| } else |
| cdrom_analyze_sense_data(drive, NULL, sense); |
| } |
| |
| if (!rq->current_nr_sectors && blk_fs_request(rq)) |
| uptodate = 1; |
| /* make sure it's fully ended */ |
| if (blk_pc_request(rq)) |
| nsectors = (rq->data_len + 511) >> 9; |
| if (!nsectors) |
| nsectors = 1; |
| |
| ide_debug_log(IDE_DBG_FUNC, "Exit %s, uptodate: 0x%x, nsectors: %d\n", |
| __func__, uptodate, nsectors); |
| |
| ide_end_request(drive, uptodate, nsectors); |
| } |
| |
| static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st) |
| { |
| if (st & 0x80) |
| return; |
| ide_dump_status(drive, msg, st); |
| } |
| |
| /* |
| * Returns: |
| * 0: if the request should be continued. |
| * 1: if the request was ended. |
| */ |
| static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret) |
| { |
| ide_hwif_t *hwif = drive->hwif; |
| struct request *rq = hwif->rq; |
| int stat, err, sense_key; |
| |
| /* check for errors */ |
| stat = hwif->tp_ops->read_status(hwif); |
| |
| if (stat_ret) |
| *stat_ret = stat; |
| |
| if (OK_STAT(stat, good_stat, BAD_R_STAT)) |
| return 0; |
| |
| /* get the IDE error register */ |
| err = ide_read_error(drive); |
| sense_key = err >> 4; |
| |
| if (rq == NULL) { |
| printk(KERN_ERR PFX "%s: missing rq in %s\n", |
| drive->name, __func__); |
| return 1; |
| } |
| |
| ide_debug_log(IDE_DBG_RQ, "%s: stat: 0x%x, good_stat: 0x%x, " |
| "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x, err: 0x%x\n", |
| __func__, stat, good_stat, rq->cmd[0], rq->cmd_type, err); |
| |
| 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; |
| cdrom_end_request(drive, 0); |
| ide_error(drive, "request sense failure", stat); |
| return 1; |
| |
| } else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) { |
| /* All other functions, except for READ. */ |
| |
| /* |
| * if we have an error, pass back CHECK_CONDITION as the |
| * scsi status byte |
| */ |
| if (blk_pc_request(rq) && !rq->errors) |
| rq->errors = SAM_STAT_CHECK_CONDITION; |
| |
| /* check for tray open */ |
| if (sense_key == NOT_READY) { |
| cdrom_saw_media_change(drive); |
| } else if (sense_key == UNIT_ATTENTION) { |
| /* check for media change */ |
| cdrom_saw_media_change(drive); |
| return 0; |
| } else if (sense_key == ILLEGAL_REQUEST && |
| rq->cmd[0] == GPCMD_START_STOP_UNIT) { |
| /* |
| * 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! |
| */ |
| } else if (!(rq->cmd_flags & REQ_QUIET)) { |
| /* otherwise, print an error */ |
| ide_dump_status(drive, "packet command error", stat); |
| } |
| |
| rq->cmd_flags |= REQ_FAILED; |
| |
| /* |
| * instead of playing games with moving completions around, |
| * remove failed request completely and end it when the |
| * request sense has completed |
| */ |
| goto end_request; |
| |
| } else if (blk_fs_request(rq)) { |
| int do_end_request = 0; |
| |
| /* handle errors from READ and WRITE requests */ |
| |
| if (blk_noretry_request(rq)) |
| do_end_request = 1; |
| |
| if (sense_key == NOT_READY) { |
| /* tray open */ |
| if (rq_data_dir(rq) == READ) { |
| cdrom_saw_media_change(drive); |
| |
| /* fail the request */ |
| printk(KERN_ERR PFX "%s: tray open\n", |
| drive->name); |
| do_end_request = 1; |
| } else { |
| struct cdrom_info *info = drive->driver_data; |
| |
| /* |
| * Allow the drive 5 seconds to recover, some |
| * devices will return this error while flushing |
| * data from cache. |
| */ |
| if (!rq->errors) |
| info->write_timeout = jiffies + |
| ATAPI_WAIT_WRITE_BUSY; |
| rq->errors = 1; |
| if (time_after(jiffies, info->write_timeout)) |
| do_end_request = 1; |
| 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; |
| } |
| } |
| } else if (sense_key == UNIT_ATTENTION) { |
| /* media change */ |
| cdrom_saw_media_change(drive); |
| |
| /* |
| * 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; |
| } else if (sense_key == ILLEGAL_REQUEST || |
| sense_key == DATA_PROTECT) { |
| /* |
| * No point in retrying after an illegal request or data |
| * protect error. |
| */ |
| ide_dump_status_no_sense(drive, "command error", stat); |
| do_end_request = 1; |
| } else if (sense_key == MEDIUM_ERROR) { |
| /* |
| * No point in re-trying a zillion times on a bad |
| * sector. If we got here the error is not correctable. |
| */ |
| ide_dump_status_no_sense(drive, |
| "media error (bad sector)", |
| stat); |
| do_end_request = 1; |
| } else if (sense_key == BLANK_CHECK) { |
| /* disk appears blank ?? */ |
| ide_dump_status_no_sense(drive, "media error (blank)", |
| stat); |
| do_end_request = 1; |
| } else if ((err & ~ATA_ABORTED) != 0) { |
| /* 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; |
| } |
| |
| /* |
| * 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) |
| cdrom_queue_request_sense(drive, NULL, NULL); |
| } else { |
| blk_dump_rq_flags(rq, PFX "bad rq"); |
| cdrom_end_request(drive, 0); |
| } |
| |
| /* retry, or handle the next request */ |
| 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; |
| |
| cdrom_queue_request_sense(drive, rq->sense, rq); |
| } else |
| cdrom_end_request(drive, 0); |
| |
| return 1; |
| } |
| |
| /* |
| * 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, "Call %s, ireason: 0x%x, rw: 0x%x\n", |
| __func__, 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; |
| |
| cdrom_end_request(drive, 0); |
| return -1; |
| } |
| |
| /* |
| * Assume that the drive will always provide data in multiples of at least |
| * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise. |
| */ |
| static int ide_cd_check_transfer_size(ide_drive_t *drive, int len) |
| { |
| ide_debug_log(IDE_DBG_FUNC, "Call %s, len: %d\n", __func__, len); |
| |
| if ((len % SECTOR_SIZE) == 0) |
| return 0; |
| |
| printk(KERN_ERR PFX "%s: %s: Bad transfer size %d\n", drive->name, |
| __func__, len); |
| |
| if (drive->atapi_flags & IDE_AFLAG_LIMIT_NFRAMES) |
| printk(KERN_ERR PFX "This drive is not supported by this " |
| "version of the driver\n"); |
| else { |
| printk(KERN_ERR PFX "Trying to limit transfer sizes\n"); |
| drive->atapi_flags |= IDE_AFLAG_LIMIT_NFRAMES; |
| } |
| |
| return 1; |
| } |
| |
| static ide_startstop_t ide_cd_prepare_rw_request(ide_drive_t *drive, |
| struct request *rq) |
| { |
| ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd_flags: 0x%x\n", __func__, |
| rq->cmd_flags); |
| |
| if (rq_data_dir(rq) == READ) { |
| unsigned short sectors_per_frame = |
| queue_hardsect_size(drive->queue) >> SECTOR_BITS; |
| int nskip = rq->sector & (sectors_per_frame - 1); |
| |
| /* |
| * If the requested sector doesn't start on a frame boundary, |
| * we must adjust the start of the transfer so that it does, |
| * and remember to skip the first few sectors. |
| * |
| * If the rq->current_nr_sectors field is larger than the size |
| * of the buffer, it will mean that we're to skip a number of |
| * sectors equal to the amount by which rq->current_nr_sectors |
| * is larger than the buffer size. |
| */ |
| if (nskip > 0) { |
| /* sanity check... */ |
| if (rq->current_nr_sectors != |
| bio_cur_sectors(rq->bio)) { |
| printk(KERN_ERR PFX "%s: %s: buffer botch (%u)\n", |
| drive->name, __func__, |
| rq->current_nr_sectors); |
| cdrom_end_request(drive, 0); |
| return ide_stopped; |
| } |
| rq->current_nr_sectors += nskip; |
| } |
| } |
| |
| /* set up the command */ |
| rq->timeout = ATAPI_WAIT_PC; |
| |
| return ide_started; |
| } |
| |
| /* |
| * Fix up a possibly partially-processed request so that we can start it over |
| * entirely, or even put it back on the request queue. |
| */ |
| static void ide_cd_restore_request(ide_drive_t *drive, struct request *rq) |
| { |
| |
| ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); |
| |
| if (rq->buffer != bio_data(rq->bio)) { |
| sector_t n = |
| (rq->buffer - (char *)bio_data(rq->bio)) / SECTOR_SIZE; |
| |
| rq->buffer = bio_data(rq->bio); |
| rq->nr_sectors += n; |
| rq->sector -= n; |
| } |
| rq->current_nr_sectors = bio_cur_sectors(rq->bio); |
| rq->hard_cur_sectors = rq->current_nr_sectors; |
| rq->hard_nr_sectors = rq->nr_sectors; |
| rq->hard_sector = rq->sector; |
| rq->q->prep_rq_fn(rq->q, rq); |
| } |
| |
| static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct request *rq) |
| { |
| ide_debug_log(IDE_DBG_FUNC, "Call %s, rq->cmd[0]: 0x%x\n", |
| __func__, 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 && |
| rq->data_len > 0 && rq->data_len <= 5) |
| while (rq->data_len > 0) { |
| *(u8 *)rq->data++ = 0; |
| --rq->data_len; |
| } |
| } |
| |
| 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, "Call %s, cmd[0]: 0x%x, write: 0x%x, " |
| "timeout: %d, cmd_flags: 0x%x\n", __func__, 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) { |
| rq->data = buffer; |
| rq->data_len = *bufflen; |
| } |
| |
| 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; |
| } |
| |
| /* |
| * Called from blk_end_request_callback() after the data of the request is |
| * completed and before the request itself is completed. By returning value '1', |
| * blk_end_request_callback() returns immediately without completing it. |
| */ |
| static int cdrom_newpc_intr_dummy_cb(struct request *rq) |
| { |
| return 1; |
| } |
| |
| static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) |
| { |
| ide_hwif_t *hwif = drive->hwif; |
| struct request *rq = hwif->rq; |
| xfer_func_t *xferfunc; |
| ide_expiry_t *expiry = NULL; |
| int dma_error = 0, dma, stat, thislen, uptodate = 0; |
| int write = (rq_data_dir(rq) == WRITE) ? 1 : 0; |
| unsigned int timeout; |
| u16 len; |
| u8 ireason; |
| |
| ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x\n", |
| __func__, rq->cmd[0], write); |
| |
| /* check for errors */ |
| dma = drive->dma; |
| if (dma) { |
| drive->dma = 0; |
| dma_error = hwif->dma_ops->dma_end(drive); |
| if (dma_error) { |
| printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name, |
| write ? "write" : "read"); |
| ide_dma_off(drive); |
| } |
| } |
| |
| if (cdrom_decode_status(drive, 0, &stat)) |
| return ide_stopped; |
| |
| /* using dma, transfer is complete now */ |
| if (dma) { |
| if (dma_error) |
| return ide_error(drive, "dma error", stat); |
| if (blk_fs_request(rq)) { |
| ide_end_request(drive, 1, rq->nr_sectors); |
| return ide_stopped; |
| } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) { |
| ide_end_request(drive, 1, 1); |
| return ide_stopped; |
| } |
| goto end_request; |
| } |
| |
| ide_read_bcount_and_ireason(drive, &len, &ireason); |
| |
| thislen = blk_fs_request(rq) ? len : rq->data_len; |
| if (thislen > len) |
| thislen = len; |
| |
| ide_debug_log(IDE_DBG_PC, "%s: DRQ: stat: 0x%x, thislen: %d\n", |
| __func__, 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 (rq->current_nr_sectors > 0) { |
| printk(KERN_ERR PFX "%s: %s: data underrun " |
| "(%d blocks)\n", |
| drive->name, __func__, |
| rq->current_nr_sectors); |
| if (!write) |
| rq->cmd_flags |= REQ_FAILED; |
| uptodate = 0; |
| } |
| cdrom_end_request(drive, uptodate); |
| return ide_stopped; |
| } else if (!blk_pc_request(rq)) { |
| ide_cd_request_sense_fixup(drive, rq); |
| /* complain if we still have data left to transfer */ |
| uptodate = rq->data_len ? 0 : 1; |
| } |
| goto end_request; |
| } |
| |
| /* check which way to transfer data */ |
| if (ide_cd_check_ireason(drive, rq, len, ireason, write)) |
| return ide_stopped; |
| |
| if (blk_fs_request(rq)) { |
| if (write == 0) { |
| int nskip; |
| |
| if (ide_cd_check_transfer_size(drive, len)) { |
| cdrom_end_request(drive, 0); |
| return ide_stopped; |
| } |
| |
| /* |
| * First, figure out if we need to bit-bucket |
| * any of the leading sectors. |
| */ |
| nskip = min_t(int, rq->current_nr_sectors |
| - bio_cur_sectors(rq->bio), |
| thislen >> 9); |
| if (nskip > 0) { |
| ide_pad_transfer(drive, write, nskip << 9); |
| rq->current_nr_sectors -= nskip; |
| thislen -= (nskip << 9); |
| } |
| } |
| } |
| |
| if (ireason == 0) { |
| write = 1; |
| xferfunc = hwif->tp_ops->output_data; |
| } else { |
| write = 0; |
| xferfunc = hwif->tp_ops->input_data; |
| } |
| |
| ide_debug_log(IDE_DBG_PC, "%s: data transfer, rq->cmd_type: 0x%x, " |
| "ireason: 0x%x\n", __func__, rq->cmd_type, ireason); |
| |
| /* transfer data */ |
| while (thislen > 0) { |
| u8 *ptr = blk_fs_request(rq) ? NULL : rq->data; |
| int blen = rq->data_len; |
| |
| /* bio backed? */ |
| if (rq->bio) { |
| if (blk_fs_request(rq)) { |
| ptr = rq->buffer; |
| blen = rq->current_nr_sectors << 9; |
| } else { |
| ptr = bio_data(rq->bio); |
| blen = bio_iovec(rq->bio)->bv_len; |
| } |
| } |
| |
| if (!ptr) { |
| if (blk_fs_request(rq) && !write) |
| /* |
| * If the buffers are full, pipe the rest into |
| * oblivion. |
| */ |
| ide_pad_transfer(drive, 0, thislen); |
| else { |
| printk(KERN_ERR PFX "%s: confused, missing data\n", |
| drive->name); |
| blk_dump_rq_flags(rq, rq_data_dir(rq) |
| ? "cdrom_newpc_intr, write" |
| : "cdrom_newpc_intr, read"); |
| } |
| break; |
| } |
| |
| if (blen > thislen) |
| blen = thislen; |
| |
| xferfunc(drive, NULL, ptr, blen); |
| |
| thislen -= blen; |
| len -= blen; |
| |
| if (blk_fs_request(rq)) { |
| rq->buffer += blen; |
| rq->nr_sectors -= (blen >> 9); |
| rq->current_nr_sectors -= (blen >> 9); |
| rq->sector += (blen >> 9); |
| |
| if (rq->current_nr_sectors == 0 && rq->nr_sectors) |
| cdrom_end_request(drive, 1); |
| } else { |
| rq->data_len -= blen; |
| |
| /* |
| * The request can't be completed until DRQ is cleared. |
| * So complete the data, but don't complete the request |
| * using the dummy function for the callback feature |
| * of blk_end_request_callback(). |
| */ |
| if (rq->bio) |
| blk_end_request_callback(rq, 0, blen, |
| cdrom_newpc_intr_dummy_cb); |
| else |
| rq->data += blen; |
| } |
| if (!write && blk_sense_request(rq)) |
| rq->sense_len += blen; |
| } |
| |
| /* pad, if necessary */ |
| if (!blk_fs_request(rq) && len > 0) |
| ide_pad_transfer(drive, write, len); |
| |
| if (blk_pc_request(rq)) { |
| timeout = rq->timeout; |
| } else { |
| timeout = ATAPI_WAIT_PC; |
| if (!blk_fs_request(rq)) |
| expiry = ide_cd_expiry; |
| } |
| |
| ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry); |
| return ide_started; |
| |
| end_request: |
| if (blk_pc_request(rq)) { |
| unsigned int dlen = rq->data_len; |
| |
| if (dma) |
| rq->data_len = 0; |
| |
| if (blk_end_request(rq, 0, dlen)) |
| BUG(); |
| |
| hwif->rq = NULL; |
| } else { |
| if (!uptodate) |
| rq->cmd_flags |= REQ_FAILED; |
| cdrom_end_request(drive, uptodate); |
| } |
| return ide_stopped; |
| } |
| |
| static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq) |
| { |
| struct cdrom_info *cd = drive->driver_data; |
| int write = rq_data_dir(rq) == WRITE; |
| unsigned short sectors_per_frame = |
| queue_hardsect_size(drive->queue) >> SECTOR_BITS; |
| |
| ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, write: 0x%x, " |
| "secs_per_frame: %u\n", |
| __func__, rq->cmd[0], write, sectors_per_frame); |
| |
| if (write) { |
| /* disk has become write protected */ |
| if (get_disk_ro(cd->disk)) { |
| cdrom_end_request(drive, 0); |
| 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. |
| */ |
| ide_cd_restore_request(drive, rq); |
| } |
| |
| /* use DMA, if possible / writes *must* be hardware frame aligned */ |
| if ((rq->nr_sectors & (sectors_per_frame - 1)) || |
| (rq->sector & (sectors_per_frame - 1))) { |
| if (write) { |
| cdrom_end_request(drive, 0); |
| return ide_stopped; |
| } |
| drive->dma = 0; |
| } else |
| drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); |
| |
| if (write) |
| cd->devinfo.media_written = 1; |
| |
| return ide_started; |
| } |
| |
| static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) |
| { |
| |
| ide_debug_log(IDE_DBG_PC, "Call %s, rq->cmd[0]: 0x%x, " |
| "rq->cmd_type: 0x%x\n", __func__, 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 || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) { |
| struct request_queue *q = drive->queue; |
| unsigned int alignment; |
| char *buf; |
| |
| if (rq->bio) |
| buf = bio_data(rq->bio); |
| else |
| buf = rq->data; |
| |
| 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) |
| { |
| ide_debug_log(IDE_DBG_RQ, "Call %s, rq->cmd[0]: 0x%x, " |
| "rq->cmd_type: 0x%x, block: %llu\n", |
| __func__, rq->cmd[0], rq->cmd_type, |
| (unsigned long long)block); |
| |
| if (blk_fs_request(rq)) { |
| if (cdrom_start_rw(drive, rq) == ide_stopped) |
| return ide_stopped; |
| |
| if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped) |
| return ide_stopped; |
| } 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... */ |
| cdrom_end_request(drive, 1); |
| return ide_stopped; |
| } else { |
| blk_dump_rq_flags(rq, DRV_NAME " bad flags"); |
| cdrom_end_request(drive, 0); |
| return ide_stopped; |
| } |
| |
| return ide_issue_pc(drive); |
| } |
| |
| /* |
| * 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, "Call %s\n", __func__); |
| |
| 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, "Call %s\n", __func__); |
| |
| 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, "%s: cap: %lu, sectors_per_frame: %lu\n", |
| __func__, *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, "Call %s\n", __func__); |
| |
| 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, "Call %s\n", __func__); |
| |
| 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, §ors_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, "Call %s\n", __func__); |
| |
| 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, "Call %s\n", __func__); |
| |
| 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, "%s: curspeed: %u, maxspeed: %u\n", |
| __func__, 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, "Call %s, nslots: %d\n", __func__, 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, "Call %s, drive->media: 0x%x, " |
| "drive->atapi_flags: 0x%lx\n", __func__, 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, §ors_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[] = { |
| /* Limit transfer size per interrupt. */ |
| { "SAMSUNG CD-ROM SCR-2430", NULL, IDE_AFLAG_LIMIT_NFRAMES }, |
| { "SAMSUNG CD-ROM SCR-2432", NULL, IDE_AFLAG_LIMIT_NFRAMES }, |
| /* 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; |
| u16 *id = drive->id; |
| char *fw_rev = (char *)&id[ATA_ID_FW_REV]; |
| int nslots; |
| |
| ide_debug_log(IDE_DBG_PROBE, "Call %s\n", __func__); |
| |
| blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); |
| blk_queue_dma_alignment(drive->queue, 31); |
| blk_queue_update_dma_pad(drive->queue, 15); |
| drive->queue->unplug_delay = (1 * HZ) / 1000; |
| if (!drive->queue->unplug_delay) |
| drive->queue->unplug_delay = 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); |
| |
| /* set correct block size */ |
| blk_queue_hardsect_size(drive->queue, 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, "Call %s\n", __func__); |
| |
| ide_proc_unregister_driver(drive, info->driver); |
| |
| del_gendisk(info->disk); |
| |
| ide_cd_put(info); |
| } |
| |
| static void ide_cd_release(struct kref *kref) |
| { |
| struct cdrom_info *info = to_ide_drv(kref, 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, "Call %s\n", __func__); |
| |
| 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, |
| .end_request = ide_end_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 char *ignore; |
| module_param(ignore, charp, 0400); |
| |
| 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, "Call %s, drive->driver_req: %s, " |
| "drive->media: 0x%x\n", __func__, 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; |
| |
| /* skip drives that we were told to ignore */ |
| if (ignore != NULL) { |
| if (strstr(ignore, drive->name)) { |
| printk(KERN_INFO PFX "ignoring drive %s\n", |
| drive->name); |
| 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); |
| |
| kref_init(&info->kref); |
| |
| 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)) { |
| ide_cd_release(&info->kref); |
| goto failed; |
| } |
| |
| ide_cd_read_toc(drive, &sense); |
| g->fops = &idecd_ops; |
| g->flags |= GENHD_FL_REMOVABLE; |
| add_disk(g); |
| return 0; |
| |
| 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"); |