--- /dev/null
+/*
+ * ATAPI CD-ROM driver.
+ *
+ * Copyright (C) 1994-1996 Scott Snyder <snyder@fnald0.fnal.gov>
+ * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
+ * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
+ * Copyright (C) 2005, 2007-2009 Bartlomiej Zolnierkiewicz
+ *
+ * May be copied or modified under the terms of the GNU General Public
+ * License. See linux/COPYING for more information.
+ *
+ * See Documentation/cdrom/ide-cd for usage information.
+ *
+ * Suggestions are welcome. Patches that work are more welcome though. ;-)
+ *
+ * Documentation:
+ * Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
+ *
+ * For historical changelog please see:
+ * Documentation/ide/ChangeLog.ide-cd.1994-2004
+ */
+
+#define DRV_NAME "ide-cd"
+#define PFX DRV_NAME ": "
+
+#define IDECD_VERSION "5.00"
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/seq_file.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/io.h>
+#include <asm/byteorder.h>
+#include <linux/uaccess.h>
+#include <asm/unaligned.h>
+
+#include "ide-cd.h"
+
+static DEFINE_MUTEX(ide_cd_mutex);
+static DEFINE_MUTEX(idecd_ref_mutex);
+
+static void ide_cd_release(struct device *);
+
+static struct cdrom_info *ide_cd_get(struct gendisk *disk)
+{
+ struct cdrom_info *cd = NULL;
+
+ mutex_lock(&idecd_ref_mutex);
+ cd = ide_drv_g(disk, cdrom_info);
+ if (cd) {
+ if (ide_device_get(cd->drive))
+ cd = NULL;
+ else
+ get_device(&cd->dev);
+
+ }
+ mutex_unlock(&idecd_ref_mutex);
+ return cd;
+}
+
+static void ide_cd_put(struct cdrom_info *cd)
+{
+ ide_drive_t *drive = cd->drive;
+
+ mutex_lock(&idecd_ref_mutex);
+ put_device(&cd->dev);
+ ide_device_put(drive);
+ mutex_unlock(&idecd_ref_mutex);
+}
+
+/*
+ * Generic packet command support and error handling routines.
+ */
+
+/* Mark that we've seen a media change and invalidate our internal buffers. */
+static void cdrom_saw_media_change(ide_drive_t *drive)
+{
+ drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
+ drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
+}
+
+static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
+{
+ struct request_sense *sense = &drive->sense_data;
+ int log = 0;
+
+ if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
+ return 0;
+
+ ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
+
+ 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 = &drive->sense_data;
+ struct cdrom_info *info = drive->driver_data;
+ unsigned long sector;
+ unsigned long bio_sectors;
+
+ ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
+ sense->error_code, sense->sense_key);
+
+ if (failed_command)
+ ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
+ failed_command->cmd[0]);
+
+ if (!cdrom_log_sense(drive, failed_command))
+ 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 ||
+ failed_command->cmd_type != REQ_TYPE_FS)
+ break;
+ sector = (sense->information[0] << 24) |
+ (sense->information[1] << 16) |
+ (sense->information[2] << 8) |
+ (sense->information[3]);
+
+ if (queue_logical_block_size(drive->queue) == 2048)
+ /* device sector size is 2K */
+ sector <<= 2;
+
+ bio_sectors = max(bio_sectors(failed_command->bio), 4U);
+ sector &= ~(bio_sectors - 1);
+
+ /*
+ * The SCSI specification allows for the value
+ * returned by READ CAPACITY to be up to 75 2K
+ * sectors past the last readable block.
+ * Therefore, if we hit a medium error within the
+ * last 75 2K sectors, we decrease the saved size
+ * value.
+ */
+ if (sector < get_capacity(info->disk) &&
+ drive->probed_capacity - sector < 4 * 75)
+ set_capacity(info->disk, sector);
+ }
+ }
+
+ ide_cd_log_error(drive->name, failed_command, sense);
+}
+
+static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
+{
+ /*
+ * For REQ_TYPE_SENSE, "rq->special" points to the original
+ * failed request. Also, the sense data should be read
+ * directly from rq which might be different from the original
+ * sense buffer if it got copied during mapping.
+ */
+ struct request *failed = (struct request *)rq->special;
+ void *sense = bio_data(rq->bio);
+
+ if (failed) {
+ if (failed->sense) {
+ /*
+ * Sense is always read into drive->sense_data.
+ * Copy back if the failed request has its
+ * sense pointer set.
+ */
+ memcpy(failed->sense, sense, 18);
+ failed->sense_len = rq->sense_len;
+ }
+ cdrom_analyze_sense_data(drive, failed);
+
+ if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
+ BUG();
+ } else
+ cdrom_analyze_sense_data(drive, NULL);
+}
+
+
+/*
+ * Allow the drive 5 seconds to recover; some devices will return NOT_READY
+ * while flushing data from cache.
+ *
+ * returns: 0 failed (write timeout expired)
+ * 1 success
+ */
+static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
+{
+
+ struct cdrom_info *info = drive->driver_data;
+
+ if (!rq->errors)
+ info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
+
+ rq->errors = 1;
+
+ if (time_after(jiffies, info->write_timeout))
+ return 0;
+ else {
+ /*
+ * take a breather
+ */
+ blk_delay_queue(drive->queue, 1);
+ return 1;
+ }
+}
+
+/**
+ * Returns:
+ * 0: if the request should be continued.
+ * 1: if the request will be going through error recovery.
+ * 2: if the request should be ended.
+ */
+static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct request *rq = hwif->rq;
+ int err, sense_key, do_end_request = 0;
+
+ /* get the IDE error register */
+ err = ide_read_error(drive);
+ sense_key = err >> 4;
+
+ ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
+ "stat 0x%x",
+ rq->cmd[0], rq->cmd_type, err, stat);
+
+ if (rq->cmd_type == REQ_TYPE_SENSE) {
+ /*
+ * We got an error trying to get sense info from the drive
+ * (probably while trying to recover from a former error).
+ * Just give up.
+ */
+ rq->cmd_flags |= REQ_FAILED;
+ return 2;
+ }
+
+ /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
+ if (rq->cmd_type == REQ_TYPE_BLOCK_PC && !rq->errors)
+ rq->errors = SAM_STAT_CHECK_CONDITION;
+
+ if (blk_noretry_request(rq))
+ do_end_request = 1;
+
+ switch (sense_key) {
+ case NOT_READY:
+ if (rq->cmd_type == REQ_TYPE_FS && rq_data_dir(rq) == WRITE) {
+ if (ide_cd_breathe(drive, rq))
+ return 1;
+ } else {
+ cdrom_saw_media_change(drive);
+
+ if (rq->cmd_type == REQ_TYPE_FS &&
+ !(rq->cmd_flags & REQ_QUIET))
+ printk(KERN_ERR PFX "%s: tray open\n",
+ drive->name);
+ }
+ do_end_request = 1;
+ break;
+ case UNIT_ATTENTION:
+ cdrom_saw_media_change(drive);
+
+ if (rq->cmd_type != REQ_TYPE_FS)
+ return 0;
+
+ /*
+ * Arrange to retry the request but be sure to give up if we've
+ * retried too many times.
+ */
+ if (++rq->errors > ERROR_MAX)
+ do_end_request = 1;
+ break;
+ case ILLEGAL_REQUEST:
+ /*
+ * Don't print error message for this condition -- SFF8090i
+ * indicates that 5/24/00 is the correct response to a request
+ * to close the tray if the drive doesn't have that capability.
+ *
+ * cdrom_log_sense() knows this!
+ */
+ if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
+ break;
+ /* fall-through */
+ case DATA_PROTECT:
+ /*
+ * No point in retrying after an illegal request or data
+ * protect error.
+ */
+ if (!(rq->cmd_flags & REQ_QUIET))
+ ide_dump_status(drive, "command error", stat);
+ do_end_request = 1;
+ break;
+ case MEDIUM_ERROR:
+ /*
+ * No point in re-trying a zillion times on a bad sector.
+ * If we got here the error is not correctable.
+ */
+ if (!(rq->cmd_flags & REQ_QUIET))
+ ide_dump_status(drive, "media error "
+ "(bad sector)", stat);
+ do_end_request = 1;
+ break;
+ case BLANK_CHECK:
+ /* disk appears blank? */
+ if (!(rq->cmd_flags & REQ_QUIET))
+ ide_dump_status(drive, "media error (blank)",
+ stat);
+ do_end_request = 1;
+ break;
+ default:
+ if (rq->cmd_type != REQ_TYPE_FS)
+ break;
+ if (err & ~ATA_ABORTED) {
+ /* go to the default handler for other errors */
+ ide_error(drive, "cdrom_decode_status", stat);
+ return 1;
+ } else if (++rq->errors > ERROR_MAX)
+ /* we've racked up too many retries, abort */
+ do_end_request = 1;
+ }
+
+ if (rq->cmd_type != REQ_TYPE_FS) {
+ rq->cmd_flags |= REQ_FAILED;
+ do_end_request = 1;
+ }
+
+ /*
+ * End a request through request sense analysis when we have sense data.
+ * We need this in order to perform end of media processing.
+ */
+ if (do_end_request)
+ goto end_request;
+
+ /* if we got a CHECK_CONDITION status, queue a request sense command */
+ if (stat & ATA_ERR)
+ return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
+ return 1;
+
+end_request:
+ if (stat & ATA_ERR) {
+ hwif->rq = NULL;
+ return ide_queue_sense_rq(drive, rq) ? 2 : 1;
+ } else
+ return 2;
+}
+
+static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+ struct request *rq = cmd->rq;
+
+ ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
+
+ /*
+ * Some of the trailing request sense fields are optional,
+ * and some drives don't send them. Sigh.
+ */
+ if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
+ cmd->nleft > 0 && cmd->nleft <= 5)
+ cmd->nleft = 0;
+}
+
+int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
+ int write, void *buffer, unsigned *bufflen,
+ struct request_sense *sense, int timeout,
+ unsigned int cmd_flags)
+{
+ struct cdrom_info *info = drive->driver_data;
+ struct request_sense local_sense;
+ int retries = 10;
+ unsigned int flags = 0;
+
+ if (!sense)
+ sense = &local_sense;
+
+ ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
+ "cmd_flags: 0x%x",
+ cmd[0], write, timeout, cmd_flags);
+
+ /* start of retry loop */
+ do {
+ struct request *rq;
+ int error;
+
+ rq = blk_get_request(drive->queue, write, __GFP_WAIT);
+
+ memcpy(rq->cmd, cmd, BLK_MAX_CDB);
+ rq->cmd_type = REQ_TYPE_ATA_PC;
+ rq->sense = sense;
+ rq->cmd_flags |= cmd_flags;
+ rq->timeout = timeout;
+ if (buffer) {
+ error = blk_rq_map_kern(drive->queue, rq, buffer,
+ *bufflen, GFP_NOIO);
+ if (error) {
+ blk_put_request(rq);
+ return error;
+ }
+ }
+
+ error = blk_execute_rq(drive->queue, info->disk, rq, 0);
+
+ if (buffer)
+ *bufflen = rq->resid_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;
+}
+
+/*
+ * returns true if rq has been completed
+ */
+static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+ unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
+
+ if (cmd->tf_flags & IDE_TFLAG_WRITE)
+ nr_bytes -= cmd->last_xfer_len;
+
+ if (nr_bytes > 0) {
+ ide_complete_rq(drive, 0, nr_bytes);
+ return true;
+ }
+
+ return false;
+}
+
+static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct ide_cmd *cmd = &hwif->cmd;
+ struct request *rq = hwif->rq;
+ ide_expiry_t *expiry = NULL;
+ int dma_error = 0, dma, thislen, uptodate = 0;
+ int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
+ int sense = (rq->cmd_type == REQ_TYPE_SENSE);
+ unsigned int timeout;
+ u16 len;
+ u8 ireason, stat;
+
+ ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
+
+ /* check for errors */
+ dma = drive->dma;
+ if (dma) {
+ drive->dma = 0;
+ drive->waiting_for_dma = 0;
+ dma_error = hwif->dma_ops->dma_end(drive);
+ ide_dma_unmap_sg(drive, cmd);
+ if (dma_error) {
+ printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
+ write ? "write" : "read");
+ ide_dma_off(drive);
+ }
+ }
+
+ /* check status */
+ stat = hwif->tp_ops->read_status(hwif);
+
+ if (!OK_STAT(stat, 0, BAD_R_STAT)) {
+ rc = cdrom_decode_status(drive, stat);
+ if (rc) {
+ if (rc == 2)
+ goto out_end;
+ return ide_stopped;
+ }
+ }
+
+ /* using dma, transfer is complete now */
+ if (dma) {
+ if (dma_error)
+ return ide_error(drive, "dma error", stat);
+ uptodate = 1;
+ goto out_end;
+ }
+
+ ide_read_bcount_and_ireason(drive, &len, &ireason);
+
+ thislen = (rq->cmd_type == REQ_TYPE_FS) ? len : cmd->nleft;
+ if (thislen > len)
+ thislen = len;
+
+ ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
+ stat, thislen);
+
+ /* If DRQ is clear, the command has completed. */
+ if ((stat & ATA_DRQ) == 0) {
+ if (rq->cmd_type == REQ_TYPE_FS) {
+ /*
+ * If we're not done reading/writing, complain.
+ * Otherwise, complete the command normally.
+ */
+ uptodate = 1;
+ if (cmd->nleft > 0) {
+ printk(KERN_ERR PFX "%s: %s: data underrun "
+ "(%u bytes)\n", drive->name, __func__,
+ cmd->nleft);
+ if (!write)
+ rq->cmd_flags |= REQ_FAILED;
+ uptodate = 0;
+ }
+ } else if (rq->cmd_type != REQ_TYPE_BLOCK_PC) {
+ ide_cd_request_sense_fixup(drive, cmd);
+
+ uptodate = cmd->nleft ? 0 : 1;
+
+ /*
+ * suck out the remaining bytes from the drive in an
+ * attempt to complete the data xfer. (see BZ#13399)
+ */
+ if (!(stat & ATA_ERR) && !uptodate && thislen) {
+ ide_pio_bytes(drive, cmd, write, thislen);
+ uptodate = cmd->nleft ? 0 : 1;
+ }
+
+ if (!uptodate)
+ rq->cmd_flags |= REQ_FAILED;
+ }
+ goto out_end;
+ }
+
+ rc = ide_check_ireason(drive, rq, len, ireason, write);
+ if (rc)
+ goto out_end;
+
+ cmd->last_xfer_len = 0;
+
+ ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
+ "ireason: 0x%x",
+ rq->cmd_type, ireason);
+
+ /* transfer data */
+ while (thislen > 0) {
+ int blen = min_t(int, thislen, cmd->nleft);
+
+ if (cmd->nleft == 0)
+ break;
+
+ ide_pio_bytes(drive, cmd, write, blen);
+ cmd->last_xfer_len += blen;
+
+ thislen -= blen;
+ len -= blen;
+
+ if (sense && write == 0)
+ rq->sense_len += blen;
+ }
+
+ /* pad, if necessary */
+ if (len > 0) {
+ if (rq->cmd_type != REQ_TYPE_FS || write == 0)
+ ide_pad_transfer(drive, write, len);
+ else {
+ printk(KERN_ERR PFX "%s: confused, missing data\n",
+ drive->name);
+ blk_dump_rq_flags(rq, "cdrom_newpc_intr");
+ }
+ }
+
+ if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
+ timeout = rq->timeout;
+ } else {
+ timeout = ATAPI_WAIT_PC;
+ if (rq->cmd_type != REQ_TYPE_FS)
+ expiry = ide_cd_expiry;
+ }
+
+ hwif->expiry = expiry;
+ ide_set_handler(drive, cdrom_newpc_intr, timeout);
+ return ide_started;
+
+out_end:
+ if (rq->cmd_type == REQ_TYPE_BLOCK_PC && rc == 0) {
+ rq->resid_len = 0;
+ blk_end_request_all(rq, 0);
+ hwif->rq = NULL;
+ } else {
+ if (sense && uptodate)
+ ide_cd_complete_failed_rq(drive, rq);
+
+ if (rq->cmd_type == REQ_TYPE_FS) {
+ if (cmd->nleft == 0)
+ uptodate = 1;
+ } else {
+ if (uptodate <= 0 && rq->errors == 0)
+ rq->errors = -EIO;
+ }
+
+ if (uptodate == 0 && rq->bio)
+ if (ide_cd_error_cmd(drive, cmd))
+ return ide_stopped;
+
+ /* make sure it's fully ended */
+ if (rq->cmd_type != REQ_TYPE_FS) {
+ rq->resid_len -= cmd->nbytes - cmd->nleft;
+ if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
+ rq->resid_len += cmd->last_xfer_len;
+ }
+
+ ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
+
+ if (sense && rc == 2)
+ ide_error(drive, "request sense failure", stat);
+ }
+ return ide_stopped;
+}
+
+static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
+{
+ struct cdrom_info *cd = drive->driver_data;
+ struct request_queue *q = drive->queue;
+ int write = rq_data_dir(rq) == WRITE;
+ unsigned short sectors_per_frame =
+ queue_logical_block_size(q) >> SECTOR_BITS;
+
+ ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
+ "secs_per_frame: %u",
+ rq->cmd[0], rq->cmd_flags, sectors_per_frame);
+
+ if (write) {
+ /* disk has become write protected */
+ if (get_disk_ro(cd->disk))
+ return ide_stopped;
+ } else {
+ /*
+ * We may be retrying this request after an error. Fix up any
+ * weirdness which might be present in the request packet.
+ */
+ q->prep_rq_fn(q, rq);
+ }
+
+ /* fs requests *must* be hardware frame aligned */
+ if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
+ (blk_rq_pos(rq) & (sectors_per_frame - 1)))
+ return ide_stopped;
+
+ /* use DMA, if possible */
+ drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
+
+ if (write)
+ cd->devinfo.media_written = 1;
+
+ rq->timeout = ATAPI_WAIT_PC;
+
+ return ide_started;
+}
+
+static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
+{
+
+ ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
+ rq->cmd[0], rq->cmd_type);
+
+ if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
+ rq->cmd_flags |= REQ_QUIET;
+ else
+ rq->cmd_flags &= ~REQ_FAILED;
+
+ drive->dma = 0;
+
+ /* sg request */
+ if (rq->bio) {
+ struct request_queue *q = drive->queue;
+ char *buf = bio_data(rq->bio);
+ unsigned int alignment;
+
+ drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
+
+ /*
+ * check if dma is safe
+ *
+ * NOTE! The "len" and "addr" checks should possibly have
+ * separate masks.
+ */
+ alignment = queue_dma_alignment(q) | q->dma_pad_mask;
+ if ((unsigned long)buf & alignment
+ || blk_rq_bytes(rq) & q->dma_pad_mask
+ || object_is_on_stack(buf))
+ drive->dma = 0;
+ }
+}
+
+static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
+ sector_t block)
+{
+ struct ide_cmd cmd;
+ int uptodate = 0;
+ unsigned int nsectors;
+
+ ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
+ rq->cmd[0], (unsigned long long)block);
+
+ if (drive->debug_mask & IDE_DBG_RQ)
+ blk_dump_rq_flags(rq, "ide_cd_do_request");
+
+ switch (rq->cmd_type) {
+ case REQ_TYPE_FS:
+ if (cdrom_start_rw(drive, rq) == ide_stopped)
+ goto out_end;
+ break;
+ case REQ_TYPE_SENSE:
+ case REQ_TYPE_BLOCK_PC:
+ case REQ_TYPE_ATA_PC:
+ if (!rq->timeout)
+ rq->timeout = ATAPI_WAIT_PC;
+
+ cdrom_do_block_pc(drive, rq);
+ break;
+ case REQ_TYPE_SPECIAL:
+ /* right now this can only be a reset... */
+ uptodate = 1;
+ goto out_end;
+ default:
+ BUG();
+ }
+
+ /* prepare sense request for this command */
+ ide_prep_sense(drive, rq);
+
+ memset(&cmd, 0, sizeof(cmd));
+
+ if (rq_data_dir(rq))
+ cmd.tf_flags |= IDE_TFLAG_WRITE;
+
+ cmd.rq = rq;
+
+ if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
+ ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
+ ide_map_sg(drive, &cmd);
+ }
+
+ return ide_issue_pc(drive, &cmd);
+out_end:
+ nsectors = blk_rq_sectors(rq);
+
+ if (nsectors == 0)
+ nsectors = 1;
+
+ ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
+
+ return ide_stopped;
+}
+
+/*
+ * Ioctl handling.
+ *
+ * Routines which queue packet commands take as a final argument a pointer to a
+ * request_sense struct. If execution of the command results in an error with a
+ * CHECK CONDITION status, this structure will be filled with the results of the
+ * subsequent request sense command. The pointer can also be NULL, in which case
+ * no sense information is returned.
+ */
+static void msf_from_bcd(struct atapi_msf *msf)
+{
+ msf->minute = bcd2bin(msf->minute);
+ msf->second = bcd2bin(msf->second);
+ msf->frame = bcd2bin(msf->frame);
+}
+
+int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
+{
+ struct cdrom_info *info = drive->driver_data;
+ struct cdrom_device_info *cdi = &info->devinfo;
+ unsigned char cmd[BLK_MAX_CDB];
+
+ ide_debug_log(IDE_DBG_FUNC, "enter");
+
+ memset(cmd, 0, BLK_MAX_CDB);
+ cmd[0] = GPCMD_TEST_UNIT_READY;
+
+ /*
+ * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
+ * instead of supporting the LOAD_UNLOAD opcode.
+ */
+ cmd[7] = cdi->sanyo_slot % 3;
+
+ return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
+}
+
+static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
+ unsigned long *sectors_per_frame,
+ struct request_sense *sense)
+{
+ struct {
+ __be32 lba;
+ __be32 blocklen;
+ } capbuf;
+
+ int stat;
+ unsigned char cmd[BLK_MAX_CDB];
+ unsigned len = sizeof(capbuf);
+ u32 blocklen;
+
+ ide_debug_log(IDE_DBG_FUNC, "enter");
+
+ memset(cmd, 0, BLK_MAX_CDB);
+ cmd[0] = GPCMD_READ_CDVD_CAPACITY;
+
+ stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
+ REQ_QUIET);
+ if (stat)
+ return stat;
+
+ /*
+ * Sanity check the given block size, in so far as making
+ * sure the sectors_per_frame we give to the caller won't
+ * end up being bogus.
+ */
+ blocklen = be32_to_cpu(capbuf.blocklen);
+ blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
+ switch (blocklen) {
+ case 512:
+ case 1024:
+ case 2048:
+ case 4096:
+ break;
+ default:
+ printk_once(KERN_ERR PFX "%s: weird block size %u; "
+ "setting default block size to 2048\n",
+ drive->name, blocklen);
+ blocklen = 2048;
+ break;
+ }
+
+ *capacity = 1 + be32_to_cpu(capbuf.lba);
+ *sectors_per_frame = blocklen >> SECTOR_BITS;
+
+ ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
+ *capacity, *sectors_per_frame);
+
+ return 0;
+}
+
+static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
+ int format, char *buf, int buflen,
+ struct request_sense *sense)
+{
+ unsigned char cmd[BLK_MAX_CDB];
+
+ ide_debug_log(IDE_DBG_FUNC, "enter");
+
+ memset(cmd, 0, BLK_MAX_CDB);
+
+ cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
+ cmd[6] = trackno;
+ cmd[7] = (buflen >> 8);
+ cmd[8] = (buflen & 0xff);
+ cmd[9] = (format << 6);
+
+ if (msf_flag)
+ cmd[1] = 2;
+
+ return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
+}
+
+/* Try to read the entire TOC for the disk into our internal buffer. */
+int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
+{
+ int stat, ntracks, i;
+ struct cdrom_info *info = drive->driver_data;
+ struct cdrom_device_info *cdi = &info->devinfo;
+ struct atapi_toc *toc = info->toc;
+ struct {
+ struct atapi_toc_header hdr;
+ struct atapi_toc_entry ent;
+ } ms_tmp;
+ long last_written;
+ unsigned long sectors_per_frame = SECTORS_PER_FRAME;
+
+ ide_debug_log(IDE_DBG_FUNC, "enter");
+
+ if (toc == NULL) {
+ /* try to allocate space */
+ toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
+ if (toc == NULL) {
+ printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
+ drive->name);
+ return -ENOMEM;
+ }
+ info->toc = toc;
+ }
+
+ /*
+ * Check to see if the existing data is still valid. If it is,
+ * just return.
+ */
+ (void) cdrom_check_status(drive, sense);
+
+ if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
+ return 0;
+
+ /* try to get the total cdrom capacity and sector size */
+ stat = cdrom_read_capacity(drive, &toc->capacity, §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_logical_block_size(drive->queue,
+ sectors_per_frame << SECTOR_BITS);
+
+ /* first read just the header, so we know how long the TOC is */
+ stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
+ sizeof(struct atapi_toc_header), sense);
+ if (stat)
+ return stat;
+
+ if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
+ toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
+ toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
+ }
+
+ ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
+ if (ntracks <= 0)
+ return -EIO;
+ if (ntracks > MAX_TRACKS)
+ ntracks = MAX_TRACKS;
+
+ /* now read the whole schmeer */
+ stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
+ (char *)&toc->hdr,
+ sizeof(struct atapi_toc_header) +
+ (ntracks + 1) *
+ sizeof(struct atapi_toc_entry), sense);
+
+ if (stat && toc->hdr.first_track > 1) {
+ /*
+ * Cds with CDI tracks only don't have any TOC entries, despite
+ * of this the returned values are
+ * first_track == last_track = number of CDI tracks + 1,
+ * so that this case is indistinguishable from the same layout
+ * plus an additional audio track. If we get an error for the
+ * regular case, we assume a CDI without additional audio
+ * tracks. In this case the readable TOC is empty (CDI tracks
+ * are not included) and only holds the Leadout entry.
+ *
+ * Heiko Eißfeldt.
+ */
+ ntracks = 0;
+ stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
+ (char *)&toc->hdr,
+ sizeof(struct atapi_toc_header) +
+ (ntracks + 1) *
+ sizeof(struct atapi_toc_entry),
+ sense);
+ if (stat)
+ return stat;
+
+ if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
+ toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
+ toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
+ } else {
+ toc->hdr.first_track = CDROM_LEADOUT;
+ toc->hdr.last_track = CDROM_LEADOUT;
+ }
+ }
+
+ if (stat)
+ return stat;
+
+ toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
+
+ if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
+ toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
+ toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
+ }
+
+ for (i = 0; i <= ntracks; i++) {
+ if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
+ if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
+ toc->ent[i].track = bcd2bin(toc->ent[i].track);
+ msf_from_bcd(&toc->ent[i].addr.msf);
+ }
+ toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
+ toc->ent[i].addr.msf.second,
+ toc->ent[i].addr.msf.frame);
+ }
+
+ if (toc->hdr.first_track != CDROM_LEADOUT) {
+ /* read the multisession information */
+ stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
+ sizeof(ms_tmp), sense);
+ if (stat)
+ return stat;
+
+ toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
+ } else {
+ ms_tmp.hdr.last_track = CDROM_LEADOUT;
+ ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
+ toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
+ }
+
+ if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
+ /* re-read multisession information using MSF format */
+ stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
+ sizeof(ms_tmp), sense);
+ if (stat)
+ return stat;
+
+ msf_from_bcd(&ms_tmp.ent.addr.msf);
+ toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
+ ms_tmp.ent.addr.msf.second,
+ ms_tmp.ent.addr.msf.frame);
+ }
+
+ toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
+
+ /* now try to get the total cdrom capacity */
+ stat = cdrom_get_last_written(cdi, &last_written);
+ if (!stat && (last_written > toc->capacity)) {
+ toc->capacity = last_written;
+ set_capacity(info->disk, toc->capacity * sectors_per_frame);
+ drive->probed_capacity = toc->capacity * sectors_per_frame;
+ }
+
+ /* Remember that we've read this stuff. */
+ drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
+
+ return 0;
+}
+
+int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
+{
+ struct cdrom_info *info = drive->driver_data;
+ struct cdrom_device_info *cdi = &info->devinfo;
+ struct packet_command cgc;
+ int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
+
+ ide_debug_log(IDE_DBG_FUNC, "enter");
+
+ if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
+ size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
+
+ init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
+ do {
+ /* we seem to get stat=0x01,err=0x00 the first time (??) */
+ stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
+ if (!stat)
+ break;
+ } while (--attempts);
+ return stat;
+}
+
+void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
+{
+ struct cdrom_info *cd = drive->driver_data;
+ u16 curspeed, maxspeed;
+
+ ide_debug_log(IDE_DBG_FUNC, "enter");
+
+ if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
+ curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
+ maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
+ } else {
+ curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
+ maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
+ }
+
+ ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
+ curspeed, maxspeed);
+
+ cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
+ cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 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,
+ .check_events = ide_cdrom_check_events_real,
+ .tray_move = ide_cdrom_tray_move,
+ .lock_door = ide_cdrom_lock_door,
+ .select_speed = ide_cdrom_select_speed,
+ .get_last_session = ide_cdrom_get_last_session,
+ .get_mcn = ide_cdrom_get_mcn,
+ .reset = ide_cdrom_reset,
+ .audio_ioctl = ide_cdrom_audio_ioctl,
+ .capability = IDE_CD_CAPABILITIES,
+ .generic_packet = ide_cdrom_packet,
+};
+
+static int ide_cdrom_register(ide_drive_t *drive, int nslots)
+{
+ struct cdrom_info *info = drive->driver_data;
+ struct cdrom_device_info *devinfo = &info->devinfo;
+
+ ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
+
+ devinfo->ops = &ide_cdrom_dops;
+ devinfo->speed = info->current_speed;
+ devinfo->capacity = nslots;
+ devinfo->handle = drive;
+ strcpy(devinfo->name, drive->name);
+
+ if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
+ devinfo->mask |= CDC_SELECT_SPEED;
+
+ devinfo->disk = info->disk;
+ return register_cdrom(devinfo);
+}
+
+static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
+{
+ struct cdrom_info *cd = drive->driver_data;
+ struct cdrom_device_info *cdi = &cd->devinfo;
+ u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
+ mechtype_t mechtype;
+ int nslots = 1;
+
+ ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
+ drive->media, drive->atapi_flags);
+
+ cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
+ CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
+ CDC_MO_DRIVE | CDC_RAM);
+
+ if (drive->media == ide_optical) {
+ cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
+ printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
+ drive->name);
+ return nslots;
+ }
+
+ if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
+ drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
+ cdi->mask &= ~CDC_PLAY_AUDIO;
+ return nslots;
+ }
+
+ /*
+ * We have to cheat a little here. the packet will eventually be queued
+ * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
+ * Since this device hasn't been registered with the Uniform layer yet,
+ * it can't do this. Same goes for cdi->ops.
+ */
+ cdi->handle = drive;
+ cdi->ops = &ide_cdrom_dops;
+
+ if (ide_cdrom_get_capabilities(drive, buf))
+ return 0;
+
+ if ((buf[8 + 6] & 0x01) == 0)
+ drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
+ if (buf[8 + 6] & 0x08)
+ drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
+ if (buf[8 + 3] & 0x01)
+ cdi->mask &= ~CDC_CD_R;
+ if (buf[8 + 3] & 0x02)
+ cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
+ if (buf[8 + 2] & 0x38)
+ cdi->mask &= ~CDC_DVD;
+ if (buf[8 + 3] & 0x20)
+ cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
+ if (buf[8 + 3] & 0x10)
+ cdi->mask &= ~CDC_DVD_R;
+ if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
+ cdi->mask &= ~CDC_PLAY_AUDIO;
+
+ mechtype = buf[8 + 6] >> 5;
+ if (mechtype == mechtype_caddy ||
+ mechtype == mechtype_popup ||
+ (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
+ cdi->mask |= CDC_CLOSE_TRAY;
+
+ if (cdi->sanyo_slot > 0) {
+ cdi->mask &= ~CDC_SELECT_DISC;
+ nslots = 3;
+ } else if (mechtype == mechtype_individual_changer ||
+ mechtype == mechtype_cartridge_changer) {
+ nslots = cdrom_number_of_slots(cdi);
+ if (nslots > 1)
+ cdi->mask &= ~CDC_SELECT_DISC;
+ }
+
+ ide_cdrom_update_speed(drive, buf);
+
+ printk(KERN_INFO PFX "%s: ATAPI", drive->name);
+
+ /* don't print speed if the drive reported 0 */
+ if (cd->max_speed)
+ printk(KERN_CONT " %dX", cd->max_speed);
+
+ printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
+
+ if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
+ printk(KERN_CONT " DVD%s%s",
+ (cdi->mask & CDC_DVD_R) ? "" : "-R",
+ (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
+
+ if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
+ printk(KERN_CONT " CD%s%s",
+ (cdi->mask & CDC_CD_R) ? "" : "-R",
+ (cdi->mask & CDC_CD_RW) ? "" : "/RW");
+
+ if ((cdi->mask & CDC_SELECT_DISC) == 0)
+ printk(KERN_CONT " changer w/%d slots", nslots);
+ else
+ printk(KERN_CONT " drive");
+
+ printk(KERN_CONT ", %dkB Cache\n",
+ be16_to_cpup((__be16 *)&buf[8 + 12]));
+
+ return nslots;
+}
+
+/* standard prep_rq_fn that builds 10 byte cmds */
+static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
+{
+ int hard_sect = queue_logical_block_size(q);
+ long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
+ unsigned long blocks = blk_rq_sectors(rq) / (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 (rq->cmd_type == REQ_TYPE_FS)
+ return ide_cdrom_prep_fs(q, rq);
+ else if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
+ 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 idecd_capacity_proc_show(struct seq_file *m, void *v)
+{
+ ide_drive_t *drive = m->private;
+
+ seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
+ return 0;
+}
+
+static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, idecd_capacity_proc_show, PDE_DATA(inode));
+}
+
+static const struct file_operations idecd_capacity_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = idecd_capacity_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static ide_proc_entry_t idecd_proc[] = {
+ { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
+ {}
+};
+
+static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
+{
+ return idecd_proc;
+}
+
+static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
+{
+ return NULL;
+}
+#endif
+
+static const struct cd_list_entry ide_cd_quirks_list[] = {
+ /* SCR-3231 doesn't support the SET_CD_SPEED command. */
+ { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
+ /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
+ { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
+ IDE_AFLAG_PRE_ATAPI12, },
+ /* Vertos 300, some versions of this drive like to talk BCD. */
+ { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
+ /* Vertos 600 ESD. */
+ { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
+ /*
+ * Sanyo 3 CD changer uses a non-standard command for CD changing
+ * (by default standard ATAPI support for CD changers is used).
+ */
+ { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
+ { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
+ { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
+ /* Stingray 8X CD-ROM. */
+ { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
+ /*
+ * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
+ * mode sense page capabilities size, but older drives break.
+ */
+ { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
+ { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
+ /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
+ { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
+ /*
+ * Some drives used by Apple don't advertise audio play
+ * but they do support reading TOC & audio datas.
+ */
+ { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
+ { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
+ { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
+ { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
+ { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
+ { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
+ { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
+ { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
+ { NULL, NULL, 0 }
+};
+
+static unsigned int ide_cd_flags(u16 *id)
+{
+ const struct cd_list_entry *cle = ide_cd_quirks_list;
+
+ while (cle->id_model) {
+ if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
+ (cle->id_firmware == NULL ||
+ strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
+ return cle->cd_flags;
+ cle++;
+ }
+
+ return 0;
+}
+
+static int ide_cdrom_setup(ide_drive_t *drive)
+{
+ struct cdrom_info *cd = drive->driver_data;
+ struct cdrom_device_info *cdi = &cd->devinfo;
+ struct request_queue *q = drive->queue;
+ u16 *id = drive->id;
+ char *fw_rev = (char *)&id[ATA_ID_FW_REV];
+ int nslots;
+
+ ide_debug_log(IDE_DBG_PROBE, "enter");
+
+ blk_queue_prep_rq(q, ide_cdrom_prep_fn);
+ blk_queue_dma_alignment(q, 31);
+ blk_queue_update_dma_pad(q, 15);
+
+ drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
+ drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
+
+ if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
+ fw_rev[4] == '1' && fw_rev[6] <= '2')
+ drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
+ IDE_AFLAG_TOCADDR_AS_BCD);
+ else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
+ fw_rev[4] == '1' && fw_rev[6] <= '2')
+ drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
+ else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
+ /* 3 => use CD in slot 0 */
+ cdi->sanyo_slot = 3;
+
+ nslots = ide_cdrom_probe_capabilities(drive);
+
+ blk_queue_logical_block_size(q, CD_FRAMESIZE);
+
+ if (ide_cdrom_register(drive, nslots)) {
+ printk(KERN_ERR PFX "%s: %s failed to register device with the"
+ " cdrom driver.\n", drive->name, __func__);
+ cd->devinfo.handle = NULL;
+ return 1;
+ }
+
+ ide_proc_register_driver(drive, cd->driver);
+ return 0;
+}
+
+static void ide_cd_remove(ide_drive_t *drive)
+{
+ struct cdrom_info *info = drive->driver_data;
+
+ ide_debug_log(IDE_DBG_FUNC, "enter");
+
+ ide_proc_unregister_driver(drive, info->driver);
+ device_del(&info->dev);
+ del_gendisk(info->disk);
+
+ mutex_lock(&idecd_ref_mutex);
+ put_device(&info->dev);
+ mutex_unlock(&idecd_ref_mutex);
+}
+
+static void ide_cd_release(struct device *dev)
+{
+ struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
+ struct cdrom_device_info *devinfo = &info->devinfo;
+ ide_drive_t *drive = info->drive;
+ struct gendisk *g = info->disk;
+
+ ide_debug_log(IDE_DBG_FUNC, "enter");
+
+ kfree(info->toc);
+ if (devinfo->handle == drive)
+ unregister_cdrom(devinfo);
+ drive->driver_data = NULL;
+ blk_queue_prep_rq(drive->queue, NULL);
+ g->private_data = NULL;
+ put_disk(g);
+ kfree(info);
+}
+
+static int ide_cd_probe(ide_drive_t *);
+
+static struct ide_driver ide_cdrom_driver = {
+ .gen_driver = {
+ .owner = THIS_MODULE,
+ .name = "ide-cdrom",
+ .bus = &ide_bus_type,
+ },
+ .probe = ide_cd_probe,
+ .remove = ide_cd_remove,
+ .version = IDECD_VERSION,
+ .do_request = ide_cd_do_request,
+#ifdef CONFIG_IDE_PROC_FS
+ .proc_entries = ide_cd_proc_entries,
+ .proc_devsets = ide_cd_proc_devsets,
+#endif
+};
+
+static int idecd_open(struct block_device *bdev, fmode_t mode)
+{
+ struct cdrom_info *info;
+ int rc = -ENXIO;
+
+ mutex_lock(&ide_cd_mutex);
+ info = ide_cd_get(bdev->bd_disk);
+ if (!info)
+ goto out;
+
+ rc = cdrom_open(&info->devinfo, bdev, mode);
+ if (rc < 0)
+ ide_cd_put(info);
+out:
+ mutex_unlock(&ide_cd_mutex);
+ return rc;
+}
+
+static void idecd_release(struct gendisk *disk, fmode_t mode)
+{
+ struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
+
+ mutex_lock(&ide_cd_mutex);
+ cdrom_release(&info->devinfo, mode);
+
+ ide_cd_put(info);
+ mutex_unlock(&ide_cd_mutex);
+}
+
+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_locked_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_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long arg)
+{
+ int ret;
+
+ mutex_lock(&ide_cd_mutex);
+ ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
+ mutex_unlock(&ide_cd_mutex);
+
+ return ret;
+}
+
+
+static unsigned int idecd_check_events(struct gendisk *disk,
+ unsigned int clearing)
+{
+ struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
+ return cdrom_check_events(&info->devinfo, clearing);
+}
+
+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 const struct block_device_operations idecd_ops = {
+ .owner = THIS_MODULE,
+ .open = idecd_open,
+ .release = idecd_release,
+ .ioctl = idecd_ioctl,
+ .check_events = idecd_check_events,
+ .revalidate_disk = idecd_revalidate_disk
+};
+
+/* module options */
+static unsigned long debug_mask;
+module_param(debug_mask, ulong, 0644);
+
+MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
+
+static int ide_cd_probe(ide_drive_t *drive)
+{
+ struct cdrom_info *info;
+ struct gendisk *g;
+ struct request_sense sense;
+
+ ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
+ drive->driver_req, drive->media);
+
+ if (!strstr("ide-cdrom", drive->driver_req))
+ goto failed;
+
+ if (drive->media != ide_cdrom && drive->media != ide_optical)
+ goto failed;
+
+ drive->debug_mask = debug_mask;
+ drive->irq_handler = cdrom_newpc_intr;
+
+ info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
+ if (info == NULL) {
+ printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
+ drive->name);
+ goto failed;
+ }
+
+ g = alloc_disk(1 << PARTN_BITS);
+ if (!g)
+ goto out_free_cd;
+
+ ide_init_disk(g, drive);
+
+ info->dev.parent = &drive->gendev;
+ info->dev.release = ide_cd_release;
+ dev_set_name(&info->dev, "%s", dev_name(&drive->gendev));
+
+ if (device_register(&info->dev))
+ goto out_free_disk;
+
+ info->drive = drive;
+ info->driver = &ide_cdrom_driver;
+ info->disk = g;
+
+ g->private_data = &info->driver;
+
+ drive->driver_data = info;
+
+ g->minors = 1;
+ g->driverfs_dev = &drive->gendev;
+ g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
+ if (ide_cdrom_setup(drive)) {
+ put_device(&info->dev);
+ goto failed;
+ }
+
+ ide_cd_read_toc(drive, &sense);
+ g->fops = &idecd_ops;
+ g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
+ add_disk(g);
+ return 0;
+
+out_free_disk:
+ put_disk(g);
+out_free_cd:
+ kfree(info);
+failed:
+ return -ENODEV;
+}
+
+static void __exit ide_cdrom_exit(void)
+{
+ driver_unregister(&ide_cdrom_driver.gen_driver);
+}
+
+static int __init ide_cdrom_init(void)
+{
+ printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
+ return driver_register(&ide_cdrom_driver.gen_driver);
+}
+
+MODULE_ALIAS("ide:*m-cdrom*");
+MODULE_ALIAS("ide-cd");
+module_init(ide_cdrom_init);
+module_exit(ide_cdrom_exit);
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff