diff options
Diffstat (limited to 'drivers/ide/ide-cd.c')
| -rw-r--r-- | drivers/ide/ide-cd.c | 2304 |
1 files changed, 2304 insertions, 0 deletions
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c new file mode 100644 index 0000000..65f02b2 --- /dev/null +++ b/drivers/ide/ide-cd.c @@ -0,0 +1,2304 @@ +/* + * 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" + +#define IDECD_DEBUG_LOG 1 + +#if IDECD_DEBUG_LOG +#define ide_debug_log(lvl, fmt, args...) __ide_debug_log(lvl, fmt, args) +#else +#define ide_debug_log(lvl, fmt, args...) do {} while (0) +#endif + +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); + + 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 = HWGROUP(drive)->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; + unsigned long flags; + + 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 { + spin_lock_irqsave(&ide_lock, flags); + if (__blk_end_request(failed, -EIO, + failed->data_len)) + BUG(); + spin_unlock_irqrestore(&ide_lock, flags); + } + } 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->hwgroup->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 { + unsigned long flags; + + /* + * take a breather relying on the unplug + * timer to kick us again + */ + spin_lock_irqsave(&ide_lock, flags); + blk_plug_device(drive->queue); + spin_unlock_irqrestore(&ide_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) { + unsigned long flags; + + spin_lock_irqsave(&ide_lock, flags); + blkdev_dequeue_request(rq); + HWGROUP(drive)->rq = NULL; + spin_unlock_irqrestore(&ide_lock, flags); + + cdrom_queue_request_sense(drive, rq->sense, rq); + } else + cdrom_end_request(drive, 0); + + return 1; +} + +static int cdrom_timer_expiry(ide_drive_t *drive) +{ + struct request *rq = HWGROUP(drive)->rq; + unsigned long wait = 0; + + ide_debug_log(IDE_DBG_RQ, "Call %s: rq->cmd[0]: 0x%x\n", __func__, + rq->cmd[0]); + + /* + * Some commands are *slow* and normally take a long time to complete. + * Usually we can use the ATAPI "disconnect" to bypass this, but not all + * commands/drives support that. Let ide_timer_expiry keep polling us + * for these. + */ + switch (rq->cmd[0]) { + case GPCMD_BLANK: + case GPCMD_FORMAT_UNIT: + case GPCMD_RESERVE_RZONE_TRACK: + case GPCMD_CLOSE_TRACK: + case GPCMD_FLUSH_CACHE: + wait = ATAPI_WAIT_PC; + break; + default: + if (!(rq->cmd_flags & REQ_QUIET)) + printk(KERN_INFO PFX "cmd 0x%x timed out\n", + rq->cmd[0]); + wait = 0; + break; + } + return wait; +} + +/* + * Set up the device registers for transferring a packet command on DEV, + * expecting to later transfer XFERLEN bytes. HANDLER is the routine + * which actually transfers the command to the drive. If this is a + * drq_interrupt device, this routine will arrange for HANDLER to be + * called when the interrupt from the drive arrives. Otherwise, HANDLER + * will be called immediately after the drive is prepared for the transfer. + */ +static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive, + int xferlen, + ide_handler_t *handler) +{ + ide_hwif_t *hwif = drive->hwif; + + ide_debug_log(IDE_DBG_PC, "Call %s, xferlen: %d\n", __func__, xferlen); + + /* FIXME: for Virtual DMA we must check harder */ + if (drive->dma) + drive->dma = !hwif->dma_ops->dma_setup(drive); + + /* set up the controller registers */ + ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL, + xferlen, drive->dma); + + if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { + /* waiting for CDB interrupt, not DMA yet. */ + if (drive->dma) + drive->waiting_for_dma = 0; + + /* packet command */ + ide_execute_command(drive, ATA_CMD_PACKET, handler, + ATAPI_WAIT_PC, cdrom_timer_expiry); + return ide_started; + } else { + ide_execute_pkt_cmd(drive); + + return (*handler) (drive); + } +} + +/* + * Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. The device + * registers must have already been prepared by cdrom_start_packet_command. + * HANDLER is the interrupt handler to call when the command completes or + * there's data ready. + */ +#define ATAPI_MIN_CDB_BYTES 12 +static ide_startstop_t cdrom_transfer_packet_command(ide_drive_t *drive, + struct request *rq, + ide_handler_t *handler) +{ + ide_hwif_t *hwif = drive->hwif; + int cmd_len; + ide_startstop_t startstop; + + ide_debug_log(IDE_DBG_PC, "Call %s\n", __func__); + + if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) { + /* + * Here we should have been called after receiving an interrupt + * from the device. DRQ should how be set. + */ + + /* check for errors */ + if (cdrom_decode_status(drive, ATA_DRQ, NULL)) + return ide_stopped; + + /* ok, next interrupt will be DMA interrupt */ + if (drive->dma) + drive->waiting_for_dma = 1; + } else { + /* otherwise, we must wait for DRQ to get set */ + if (ide_wait_stat(&startstop, drive, ATA_DRQ, + ATA_BUSY, WAIT_READY)) + return startstop; + } + + /* arm the interrupt handler */ + ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry); + + /* ATAPI commands get padded out to 12 bytes minimum */ + cmd_len = COMMAND_SIZE(rq->cmd[0]); + if (cmd_len < ATAPI_MIN_CDB_BYTES) + cmd_len = ATAPI_MIN_CDB_BYTES; + + /* send the command to the device */ + hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len); + + /* start the DMA if need be */ + if (drive->dma) + hwif->dma_ops->dma_start(drive); + + return ide_started; +} + +/* + * 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 cdrom_newpc_intr(ide_drive_t *); + +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; +} + +/* + * Routine to send a read/write packet command to the drive. This is usually + * called directly from cdrom_start_{read,write}(). However, for drq_interrupt + * devices, it is called from an interrupt when the drive is ready to accept + * the command. + */ +static ide_startstop_t cdrom_start_rw_cont(ide_drive_t *drive) +{ + struct request *rq = drive->hwif->hwgroup->rq; + + /* send the command to the drive and return */ + return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); +} + +#define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */ +#define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */ +#define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */ + +static ide_startstop_t cdrom_seek_intr(ide_drive_t *drive) +{ + struct cdrom_info *info = drive->driver_data; + int stat; + static int retry = 10; + + ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); + + if (cdrom_decode_status(drive, 0, &stat)) + return ide_stopped; + + drive->atapi_flags |= IDE_AFLAG_SEEKING; + + if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) { + if (--retry == 0) + drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP; + } + return ide_stopped; +} + +static void ide_cd_prepare_seek_request(ide_drive_t *drive, struct request *rq) +{ + sector_t frame = rq->sector; + + ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); + + sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS); + + memset(rq->cmd, 0, BLK_MAX_CDB); + rq->cmd[0] = GPCMD_SEEK; + put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]); + + rq->timeout = ATAPI_WAIT_PC; +} + +static ide_startstop_t cdrom_start_seek_continuation(ide_drive_t *drive) +{ + struct request *rq = drive->hwif->hwgroup->rq; + + return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr); +} + +/* + * 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 = HWGROUP(drive)->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 = cdrom_timer_expiry; + } + + ide_set_handler(drive, cdrom_newpc_intr, timeout, expiry); + return ide_started; + +end_request: + if (blk_pc_request(rq)) { + unsigned long flags; + unsigned int dlen = rq->data_len; + + if (dma) + rq->data_len = 0; + + spin_lock_irqsave(&ide_lock, flags); + if (__blk_end_request(rq, 0, dlen)) + BUG(); + HWGROUP(drive)->rq = NULL; + spin_unlock_irqrestore(&ide_lock, flags); + } 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 ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive) +{ + struct request *rq = HWGROUP(drive)->rq; + + return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); +} + +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) +{ + struct cdrom_info *info = drive->driver_data; + ide_handler_t *fn; + int xferlen; + + 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 (drive->atapi_flags & IDE_AFLAG_SEEKING) { + ide_hwif_t *hwif = drive->hwif; + unsigned long elapsed = jiffies - info->start_seek; + int stat = hwif->tp_ops->read_status(hwif); + + if ((stat & ATA_DSC) != ATA_DSC) { + if (elapsed < IDECD_SEEK_TIMEOUT) { + ide_stall_queue(drive, + IDECD_SEEK_TIMER); + return ide_stopped; + } + printk(KERN_ERR PFX "%s: DSC timeout\n", + drive->name); + } + drive->atapi_flags &= ~IDE_AFLAG_SEEKING; + } + if (rq_data_dir(rq) == READ && + IDE_LARGE_SEEK(info->last_block, block, + IDECD_SEEK_THRESHOLD) && + (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP)) { + xferlen = 0; + fn = cdrom_start_seek_continuation; + + drive->dma = 0; + info->start_seek = jiffies; + + ide_cd_prepare_seek_request(drive, rq); + } else { + xferlen = 32768; + fn = cdrom_start_rw_cont; + + if (cdrom_start_rw(drive, rq) == ide_stopped) + return ide_stopped; + + if (ide_cd_prepare_rw_request(drive, rq) == ide_stopped) + return ide_stopped; + } + info->last_block = block; + } else if (blk_sense_request(rq) || blk_pc_request(rq) || + rq->cmd_type == REQ_TYPE_ATA_PC) { + xferlen = rq->data_len; + fn = cdrom_do_newpc_cont; + + 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 cdrom_start_packet_command(drive, xferlen, fn); +} + +/* + * 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 } +}; + +ide_devset_rw_flag(dsc_overlap, IDE_DFLAG_DSC_OVERLAP); + +static const struct ide_proc_devset idecd_settings[] = { + IDE_PROC_DEVSET(dsc_overlap, 0, 1), + { 0 }, +}; + +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 idecd_settings; +} +#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 (drive->next != drive) + drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP; + else + drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP; + + 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->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP; + 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 ide_driver_t 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, + .error = __ide_error, +#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; + + 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"); |
