mcd.c
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- /*
- linux/kernel/blk_drv/mcd.c - Mitsumi CDROM driver
- Copyright (C) 1992 Martin Harriss
- Portions Copyright (C) 2001 Red Hat
- martin@bdsi.com (no longer valid - where are you now, Martin?)
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- HISTORY
- 0.1 First attempt - internal use only
- 0.2 Cleaned up delays and use of timer - alpha release
- 0.3 Audio support added
- 0.3.1 Changes for mitsumi CRMC LU005S march version
- (stud11@cc4.kuleuven.ac.be)
- 0.3.2 bug fixes to the ioctls and merged with ALPHA0.99-pl12
- (Jon Tombs <jon@robots.ox.ac.uk>)
- 0.3.3 Added more #defines and mcd_setup()
- (Jon Tombs <jon@gtex02.us.es>)
- October 1993 Bernd Huebner and Ruediger Helsch, Unifix Software GmbH,
- Braunschweig, Germany: rework to speed up data read operation.
- Also enabled definition of irq and address from bootstrap, using the
- environment.
- November 93 added code for FX001 S,D (single & double speed).
- February 94 added code for broken M 5/6 series of 16-bit single speed.
- 0.4
- Added support for loadable MODULEs, so mcd can now also be loaded by
- insmod and removed by rmmod during runtime.
- Werner Zimmermann (zimmerma@rz.fht-esslingen.de), Mar. 26, 95
- 0.5
- I added code for FX001 D to drop from double speed to single speed
- when encountering errors... this helps with some "problematic" CD's
- that are supposedly "OUT OF TOLERANCE" (but are really shitty presses!)
- severely scratched, or possibly slightly warped! I have noticed that
- the Mitsumi 2x/4x drives are just less tolerant and the firmware is
- not smart enough to drop speed, so let's just kludge it with software!
- ****** THE 4X SPEED MITSUMI DRIVES HAVE THE SAME PROBLEM!!!!!! ******
- Anyone want to "DONATE" one to me?! ;) I hear sometimes they are
- even WORSE! ;)
- ** HINT... HINT... TAKE NOTES MITSUMI This could save some hassles with
- certain "large" CD's that have data on the outside edge in your
- DOS DRIVERS .... Accuracy counts... speed is secondary ;)
- 17 June 95 Modifications By Andrew J. Kroll <ag784@freenet.buffalo.edu>
- 07 July 1995 Modifications by Andrew J. Kroll
- Bjorn Ekwall <bj0rn@blox.se> added unregister_blkdev to mcd_init()
- Michael K. Johnson <johnsonm@redhat.com> added retries on open
- for slow drives which take a while to recognize that they contain
- a CD.
- November 1997 -- ported to the Uniform CD-ROM driver by Erik Andersen.
- March 1999 -- made io base and irq CONFIG_ options (Tigran Aivazian).
-
- November 1999 -- Make kernel-parameter implementation work with 2.3.x
- Removed init_module & cleanup_module in favor of
- module_init & module_exit.
- Torben Mathiasen <tmm@image.dk>
-
- September 2001 - Reformatted and cleaned up the code
- Alan Cox <alan@redhat.com>
- */
- #include <linux/module.h>
- #include <linux/errno.h>
- #include <linux/signal.h>
- #include <linux/sched.h>
- #include <linux/mm.h>
- #include <linux/timer.h>
- #include <linux/fs.h>
- #include <linux/kernel.h>
- #include <linux/devfs_fs_kernel.h>
- #include <linux/cdrom.h>
- #include <linux/ioport.h>
- #include <linux/string.h>
- #include <linux/delay.h>
- #include <linux/init.h>
- #include <linux/config.h>
- /* #define REALLY_SLOW_IO */
- #include <asm/system.h>
- #include <asm/io.h>
- #include <asm/uaccess.h>
- #define MAJOR_NR MITSUMI_CDROM_MAJOR
- #include <linux/blk.h>
- #define mcd_port mcd /* for compatible parameter passing with "insmod" */
- #include "mcd.h"
- static int mcd_blocksizes[1];
- /* I added A flag to drop to 1x speed if too many errors 0 = 1X ; 1 = 2X */
- static int mcdDouble;
- /* How many sectors to hold at 1x speed counter */
- static int mcd1xhold;
- /* Is the drive connected properly and responding?? */
- static int mcdPresent;
- #define QUICK_LOOP_DELAY udelay(45) /* use udelay */
- #define QUICK_LOOP_COUNT 20
- #define CURRENT_VALID
- (!QUEUE_EMPTY && MAJOR(CURRENT -> rq_dev) == MAJOR_NR && CURRENT -> cmd == READ
- && CURRENT -> sector != -1)
- #define MFL_STATUSorDATA (MFL_STATUS | MFL_DATA)
- #define MCD_BUF_SIZ 16
- static volatile int mcd_transfer_is_active;
- static char mcd_buf[2048 * MCD_BUF_SIZ]; /* buffer for block size conversion */
- static volatile int mcd_buf_bn[MCD_BUF_SIZ], mcd_next_bn;
- static volatile int mcd_buf_in, mcd_buf_out = -1;
- static volatile int mcd_error;
- static int mcd_open_count;
- enum mcd_state_e {
- MCD_S_IDLE, /* 0 */
- MCD_S_START, /* 1 */
- MCD_S_MODE, /* 2 */
- MCD_S_READ, /* 3 */
- MCD_S_DATA, /* 4 */
- MCD_S_STOP, /* 5 */
- MCD_S_STOPPING /* 6 */
- };
- static volatile enum mcd_state_e mcd_state = MCD_S_IDLE;
- static int mcd_mode = -1;
- static int MCMD_DATA_READ = MCMD_PLAY_READ;
- #define READ_TIMEOUT 3000
- int mitsumi_bug_93_wait;
- static short mcd_port = CONFIG_MCD_BASE; /* used as "mcd" by "insmod" */
- static int mcd_irq = CONFIG_MCD_IRQ; /* must directly follow mcd_port */
- MODULE_PARM(mcd, "1-2i");
- static int McdTimeout, McdTries;
- static DECLARE_WAIT_QUEUE_HEAD(mcd_waitq);
- static struct mcd_DiskInfo DiskInfo;
- static struct mcd_Toc Toc[MAX_TRACKS];
- static struct mcd_Play_msf mcd_Play;
- static int audioStatus;
- static char mcdDiskChanged;
- static char tocUpToDate;
- static char mcdVersion;
- static void mcd_transfer(void);
- static void mcd_poll(unsigned long dummy);
- static void mcd_invalidate_buffers(void);
- static void hsg2msf(long hsg, struct msf *msf);
- static void bin2bcd(unsigned char *p);
- static int bcd2bin(unsigned char bcd);
- static int mcdStatus(void);
- static void sendMcdCmd(int cmd, struct mcd_Play_msf *params);
- static int getMcdStatus(int timeout);
- static int GetQChannelInfo(struct mcd_Toc *qp);
- static int updateToc(void);
- static int GetDiskInfo(void);
- static int GetToc(void);
- static int getValue(unsigned char *result);
- static int mcd_open(struct cdrom_device_info *cdi, int purpose);
- static void mcd_release(struct cdrom_device_info *cdi);
- static int mcd_media_changed(struct cdrom_device_info *cdi, int disc_nr);
- static int mcd_tray_move(struct cdrom_device_info *cdi, int position);
- int mcd_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
- void *arg);
- int mcd_drive_status(struct cdrom_device_info *cdi, int slot_nr);
- struct block_device_operations mcd_bdops =
- {
- owner: THIS_MODULE,
- open: cdrom_open,
- release: cdrom_release,
- ioctl: cdrom_ioctl,
- check_media_change: cdrom_media_changed,
- };
- static struct timer_list mcd_timer;
- static struct cdrom_device_ops mcd_dops = {
- open:mcd_open,
- release:mcd_release,
- drive_status:mcd_drive_status,
- media_changed:mcd_media_changed,
- tray_move:mcd_tray_move,
- audio_ioctl:mcd_audio_ioctl,
- capability:CDC_OPEN_TRAY | CDC_MEDIA_CHANGED |
- CDC_PLAY_AUDIO | CDC_DRIVE_STATUS,
- };
- static struct cdrom_device_info mcd_info = {
- ops:&mcd_dops,
- speed:2,
- capacity:1,
- name:"mcd",
- };
- #ifndef MODULE
- static int __init mcd_setup(char *str)
- {
- int ints[9];
- (void) get_options(str, ARRAY_SIZE(ints), ints);
- if (ints[0] > 0)
- mcd_port = ints[1];
- if (ints[0] > 1)
- mcd_irq = ints[2];
- if (ints[0] > 2)
- mitsumi_bug_93_wait = ints[3];
- return 1;
- }
- __setup("mcd=", mcd_setup);
- #endif /* MODULE */
- static int mcd_media_changed(struct cdrom_device_info *cdi, int disc_nr)
- {
- return 0;
- }
- /*
- * Do a 'get status' command and get the result. Only use from the top half
- * because it calls 'getMcdStatus' which sleeps.
- */
- static int statusCmd(void)
- {
- int st = -1, retry;
- for (retry = 0; retry < MCD_RETRY_ATTEMPTS; retry++) {
- /* send get-status cmd */
- outb(MCMD_GET_STATUS, MCDPORT(0));
- st = getMcdStatus(MCD_STATUS_DELAY);
- if (st != -1)
- break;
- }
- return st;
- }
- /*
- * Send a 'Play' command and get the status. Use only from the top half.
- */
- static int mcdPlay(struct mcd_Play_msf *arg)
- {
- int retry, st = -1;
- for (retry = 0; retry < MCD_RETRY_ATTEMPTS; retry++) {
- sendMcdCmd(MCMD_PLAY_READ, arg);
- st = getMcdStatus(2 * MCD_STATUS_DELAY);
- if (st != -1)
- break;
- }
- return st;
- }
- static int mcd_tray_move(struct cdrom_device_info *cdi, int position)
- {
- int i;
- if (position) {
- /* Eject */
- /* all drives can at least stop! */
- if (audioStatus == CDROM_AUDIO_PLAY) {
- outb(MCMD_STOP, MCDPORT(0));
- i = getMcdStatus(MCD_STATUS_DELAY);
- }
- audioStatus = CDROM_AUDIO_NO_STATUS;
- outb(MCMD_EJECT, MCDPORT(0));
- /*
- * the status (i) shows failure on all but the FX drives.
- * But nothing we can do about that in software!
- * So just read the status and forget it. - Jon.
- */
- i = getMcdStatus(MCD_STATUS_DELAY);
- return 0;
- } else
- return -EINVAL;
- }
- long msf2hsg(struct msf *mp)
- {
- return bcd2bin(mp->frame) + bcd2bin(mp->sec) * 75 + bcd2bin(mp->min) * 4500 - 150;
- }
- int mcd_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
- void *arg)
- {
- int i, st;
- struct mcd_Toc qInfo;
- struct cdrom_ti *ti;
- struct cdrom_tochdr *tocHdr;
- struct cdrom_msf *msf;
- struct cdrom_subchnl *subchnl;
- struct cdrom_tocentry *entry;
- struct mcd_Toc *tocPtr;
- struct cdrom_volctrl *volctrl;
- st = statusCmd();
- if (st < 0)
- return -EIO;
- if (!tocUpToDate) {
- i = updateToc();
- if (i < 0)
- return i; /* error reading TOC */
- }
- switch (cmd) {
- case CDROMSTART: /* Spin up the drive */
- /* Don't think we can do this. Even if we could,
- * I think the drive times out and stops after a while
- * anyway. For now, ignore it.
- */
- return 0;
- case CDROMSTOP: /* Spin down the drive */
- outb(MCMD_STOP, MCDPORT(0));
- i = getMcdStatus(MCD_STATUS_DELAY);
- /* should we do anything if it fails? */
- audioStatus = CDROM_AUDIO_NO_STATUS;
- return 0;
- case CDROMPAUSE: /* Pause the drive */
- if (audioStatus != CDROM_AUDIO_PLAY)
- return -EINVAL;
- outb(MCMD_STOP, MCDPORT(0));
- i = getMcdStatus(MCD_STATUS_DELAY);
- if (GetQChannelInfo(&qInfo) < 0) {
- /* didn't get q channel info */
- audioStatus = CDROM_AUDIO_NO_STATUS;
- return 0;
- }
- mcd_Play.start = qInfo.diskTime; /* remember restart point */
- audioStatus = CDROM_AUDIO_PAUSED;
- return 0;
- case CDROMRESUME: /* Play it again, Sam */
- if (audioStatus != CDROM_AUDIO_PAUSED)
- return -EINVAL;
- /* restart the drive at the saved position. */
- i = mcdPlay(&mcd_Play);
- if (i < 0) {
- audioStatus = CDROM_AUDIO_ERROR;
- return -EIO;
- }
- audioStatus = CDROM_AUDIO_PLAY;
- return 0;
- case CDROMPLAYTRKIND: /* Play a track. This currently ignores index. */
- ti = (struct cdrom_ti *) arg;
- if (ti->cdti_trk0 < DiskInfo.first
- || ti->cdti_trk0 > DiskInfo.last
- || ti->cdti_trk1 < ti->cdti_trk0) {
- return -EINVAL;
- }
- if (ti->cdti_trk1 > DiskInfo.last)
- ti->cdti_trk1 = DiskInfo.last;
- mcd_Play.start = Toc[ti->cdti_trk0].diskTime;
- mcd_Play.end = Toc[ti->cdti_trk1 + 1].diskTime;
- #ifdef MCD_DEBUG
- printk("play: %02x:%02x.%02x to %02x:%02x.%02xn",
- mcd_Play.start.min, mcd_Play.start.sec,
- mcd_Play.start.frame, mcd_Play.end.min,
- mcd_Play.end.sec, mcd_Play.end.frame);
- #endif
- i = mcdPlay(&mcd_Play);
- if (i < 0) {
- audioStatus = CDROM_AUDIO_ERROR;
- return -EIO;
- }
- audioStatus = CDROM_AUDIO_PLAY;
- return 0;
- case CDROMPLAYMSF: /* Play starting at the given MSF address. */
- if (audioStatus == CDROM_AUDIO_PLAY) {
- outb(MCMD_STOP, MCDPORT(0));
- i = getMcdStatus(MCD_STATUS_DELAY);
- audioStatus = CDROM_AUDIO_NO_STATUS;
- }
- msf = (struct cdrom_msf *) arg;
- /* convert to bcd */
- bin2bcd(&msf->cdmsf_min0);
- bin2bcd(&msf->cdmsf_sec0);
- bin2bcd(&msf->cdmsf_frame0);
- bin2bcd(&msf->cdmsf_min1);
- bin2bcd(&msf->cdmsf_sec1);
- bin2bcd(&msf->cdmsf_frame1);
- mcd_Play.start.min = msf->cdmsf_min0;
- mcd_Play.start.sec = msf->cdmsf_sec0;
- mcd_Play.start.frame = msf->cdmsf_frame0;
- mcd_Play.end.min = msf->cdmsf_min1;
- mcd_Play.end.sec = msf->cdmsf_sec1;
- mcd_Play.end.frame = msf->cdmsf_frame1;
- #ifdef MCD_DEBUG
- printk("play: %02x:%02x.%02x to %02x:%02x.%02xn",
- mcd_Play.start.min, mcd_Play.start.sec,
- mcd_Play.start.frame, mcd_Play.end.min,
- mcd_Play.end.sec, mcd_Play.end.frame);
- #endif
- i = mcdPlay(&mcd_Play);
- if (i < 0) {
- audioStatus = CDROM_AUDIO_ERROR;
- return -EIO;
- }
- audioStatus = CDROM_AUDIO_PLAY;
- return 0;
- case CDROMREADTOCHDR: /* Read the table of contents header */
- tocHdr = (struct cdrom_tochdr *) arg;
- tocHdr->cdth_trk0 = DiskInfo.first;
- tocHdr->cdth_trk1 = DiskInfo.last;
- return 0;
- case CDROMREADTOCENTRY: /* Read an entry in the table of contents */
- entry = (struct cdrom_tocentry *) arg;
- if (entry->cdte_track == CDROM_LEADOUT)
- tocPtr = &Toc[DiskInfo.last - DiskInfo.first + 1];
- else if (entry->cdte_track > DiskInfo.last
- || entry->cdte_track < DiskInfo.first)
- return -EINVAL;
- else
- tocPtr = &Toc[entry->cdte_track];
- entry->cdte_adr = tocPtr->ctrl_addr;
- entry->cdte_ctrl = tocPtr->ctrl_addr >> 4;
- if (entry->cdte_format == CDROM_LBA)
- entry->cdte_addr.lba = msf2hsg(&tocPtr->diskTime);
- else if (entry->cdte_format == CDROM_MSF) {
- entry->cdte_addr.msf.minute =
- bcd2bin(tocPtr->diskTime.min);
- entry->cdte_addr.msf.second =
- bcd2bin(tocPtr->diskTime.sec);
- entry->cdte_addr.msf.frame =
- bcd2bin(tocPtr->diskTime.frame);
- }
- else
- return -EINVAL;
- return 0;
- case CDROMSUBCHNL: /* Get subchannel info */
- subchnl = (struct cdrom_subchnl *) arg;
- if (GetQChannelInfo(&qInfo) < 0)
- return -EIO;
- subchnl->cdsc_audiostatus = audioStatus;
- subchnl->cdsc_adr = qInfo.ctrl_addr;
- subchnl->cdsc_ctrl = qInfo.ctrl_addr >> 4;
- subchnl->cdsc_trk = bcd2bin(qInfo.track);
- subchnl->cdsc_ind = bcd2bin(qInfo.pointIndex);
- subchnl->cdsc_absaddr.msf.minute = bcd2bin(qInfo.diskTime.min);
- subchnl->cdsc_absaddr.msf.second = bcd2bin(qInfo.diskTime.sec);
- subchnl->cdsc_absaddr.msf.frame = bcd2bin(qInfo.diskTime.frame);
- subchnl->cdsc_reladdr.msf.minute = bcd2bin(qInfo.trackTime.min);
- subchnl->cdsc_reladdr.msf.second = bcd2bin(qInfo.trackTime.sec);
- subchnl->cdsc_reladdr.msf.frame = bcd2bin(qInfo.trackTime.frame);
- return (0);
- case CDROMVOLCTRL: /* Volume control */
- volctrl = (struct cdrom_volctrl *) arg;
- outb(MCMD_SET_VOLUME, MCDPORT(0));
- outb(volctrl->channel0, MCDPORT(0));
- outb(255, MCDPORT(0));
- outb(volctrl->channel1, MCDPORT(0));
- outb(255, MCDPORT(0));
- i = getMcdStatus(MCD_STATUS_DELAY);
- if (i < 0)
- return -EIO;
- {
- char a, b, c, d;
- getValue(&a);
- getValue(&b);
- getValue(&c);
- getValue(&d);
- }
- return 0;
- default:
- return -EINVAL;
- }
- }
- /*
- * Take care of the different block sizes between cdrom and Linux.
- * When Linux gets variable block sizes this will probably go away.
- */
- static void mcd_transfer(void)
- {
- if (CURRENT_VALID) {
- while (CURRENT->nr_sectors) {
- int bn = CURRENT->sector / 4;
- int i;
- for (i = 0; i < MCD_BUF_SIZ && mcd_buf_bn[i] != bn;
- ++i);
- if (i < MCD_BUF_SIZ) {
- int offs =(i * 4 + (CURRENT->sector & 3)) * 512;
- int nr_sectors = 4 - (CURRENT->sector & 3);
- if (mcd_buf_out != i) {
- mcd_buf_out = i;
- if (mcd_buf_bn[i] != bn) {
- mcd_buf_out = -1;
- continue;
- }
- }
- if (nr_sectors > CURRENT->nr_sectors)
- nr_sectors = CURRENT->nr_sectors;
- memcpy(CURRENT->buffer, mcd_buf + offs,
- nr_sectors * 512);
- CURRENT->nr_sectors -= nr_sectors;
- CURRENT->sector += nr_sectors;
- CURRENT->buffer += nr_sectors * 512;
- } else {
- mcd_buf_out = -1;
- break;
- }
- }
- }
- }
- /*
- * We only seem to get interrupts after an error.
- * Just take the interrupt and clear out the status reg.
- */
- static void mcd_interrupt(int irq, void *dev_id, struct pt_regs *regs)
- {
- int st;
- st = inb(MCDPORT(1)) & 0xFF;
- test1(printk("<int1-%02X>", st));
- if (!(st & MFL_STATUS)) {
- st = inb(MCDPORT(0)) & 0xFF;
- test1(printk("<int0-%02X>", st));
- if ((st & 0xFF) != 0xFF)
- mcd_error = st ? st & 0xFF : -1;
- }
- }
- static void do_mcd_request(request_queue_t * q)
- {
- test2(printk(" do_mcd_request(%ld+%ld)n", CURRENT->sector,
- CURRENT->nr_sectors));
- mcd_transfer_is_active = 1;
- while (CURRENT_VALID) {
- if (CURRENT->bh) {
- if (!buffer_locked(CURRENT->bh))
- panic(DEVICE_NAME ": block not locked");
- }
- mcd_transfer();
- if (CURRENT->nr_sectors == 0) {
- end_request(1);
- } else {
- mcd_buf_out = -1; /* Want to read a block not in buffer */
- if (mcd_state == MCD_S_IDLE) {
- if (!tocUpToDate) {
- if (updateToc() < 0) {
- while (CURRENT_VALID)
- end_request(0);
- break;
- }
- }
- mcd_state = MCD_S_START;
- McdTries = 5;
- mcd_timer.function = mcd_poll;
- mod_timer(&mcd_timer, jiffies + 1);
- }
- break;
- }
- }
- mcd_transfer_is_active = 0;
- test2(printk(" do_mcd_request endsn"));
- }
- static void mcd_poll(unsigned long dummy)
- {
- int st;
- if (mcd_error) {
- if (mcd_error & 0xA5) {
- printk(KERN_ERR "mcd: I/O error 0x%02x", mcd_error);
- if (mcd_error & 0x80)
- printk(" (Door open)");
- if (mcd_error & 0x20)
- printk(" (Disk changed)");
- if (mcd_error & 0x04) {
- printk(" (Read error)"); /* Bitch about the problem. */
- /* Time to get fancy! If at 2x speed and 1 error, drop to 1x speed! */
- /* Interesting how it STAYS at MCD_RETRY_ATTEMPTS on first error! */
- /* But I find that rather HANDY!!! */
- /* Neat! it REALLY WORKS on those LOW QUALITY CD's!!! Smile! :) */
- /* AJK [06/17/95] */
- /* Slap the CD down to single speed! */
- if (mcdDouble == 1
- && McdTries == MCD_RETRY_ATTEMPTS
- && MCMD_DATA_READ == MCMD_2X_READ) {
- MCMD_DATA_READ = MCMD_PLAY_READ; /* Uhhh, Ummmm, muhuh-huh! */
- mcd1xhold = SINGLE_HOLD_SECTORS; /* Hey Beavis! */
- printk(" Speed now 1x"); /* Pull my finger! */
- }
- }
- printk("n");
- mcd_invalidate_buffers();
- #ifdef WARN_IF_READ_FAILURE
- if (McdTries == MCD_RETRY_ATTEMPTS)
- printk(KERN_ERR "mcd: read of block %d failedn",
- mcd_next_bn);
- #endif
- if (!McdTries--) {
- /* Nuts! This cd is ready for recycling! */
- /* When WAS the last time YOU cleaned it CORRECTLY?! */
- printk(KERN_ERR "mcd: read of block %d failed, giving upn",
- mcd_next_bn);
- if (mcd_transfer_is_active) {
- McdTries = 0;
- goto ret;
- }
- if (CURRENT_VALID)
- end_request(0);
- McdTries = MCD_RETRY_ATTEMPTS;
- }
- }
- mcd_error = 0;
- mcd_state = MCD_S_STOP;
- }
- /* Switch back to Double speed if enough GOOD sectors were read! */
- /* Are we a double speed with a crappy CD?! */
- if (mcdDouble == 1 && McdTries == MCD_RETRY_ATTEMPTS
- && MCMD_DATA_READ == MCMD_PLAY_READ) {
- /* We ARE a double speed and we ARE bitching! */
- if (mcd1xhold == 0) { /* Okay, Like are we STILL at single speed? *//* We need to switch back to double speed now... */
- MCMD_DATA_READ = MCMD_2X_READ; /* Uhhh... BACK You GO! */
- printk(KERN_INFO "mcd: Switching back to 2X speed!n"); /* Tell 'em! */
- } else
- mcd1xhold--; /* No?! Count down the good reads some more... */
- /* and try, try again! */
- }
- immediately:
- switch (mcd_state) {
- case MCD_S_IDLE:
- test3(printk("MCD_S_IDLEn"));
- goto out;
- case MCD_S_START:
- test3(printk("MCD_S_STARTn"));
- outb(MCMD_GET_STATUS, MCDPORT(0));
- mcd_state = mcd_mode == 1 ? MCD_S_READ : MCD_S_MODE;
- McdTimeout = 3000;
- break;
- case MCD_S_MODE:
- test3(printk("MCD_S_MODEn"));
- if ((st = mcdStatus()) != -1) {
- if (st & MST_DSK_CHG) {
- mcdDiskChanged = 1;
- tocUpToDate = 0;
- mcd_invalidate_buffers();
- }
- set_mode_immediately:
- if ((st & MST_DOOR_OPEN) || !(st & MST_READY)) {
- mcdDiskChanged = 1;
- tocUpToDate = 0;
- if (mcd_transfer_is_active) {
- mcd_state = MCD_S_START;
- goto immediately;
- }
- printk(KERN_INFO);
- printk((st & MST_DOOR_OPEN) ?
- "mcd: door openn" :
- "mcd: disk removedn");
- mcd_state = MCD_S_IDLE;
- while (CURRENT_VALID)
- end_request(0);
- goto out;
- }
- outb(MCMD_SET_MODE, MCDPORT(0));
- outb(1, MCDPORT(0));
- mcd_mode = 1;
- mcd_state = MCD_S_READ;
- McdTimeout = 3000;
- }
- break;
- case MCD_S_READ:
- test3(printk("MCD_S_READn"));
- if ((st = mcdStatus()) != -1) {
- if (st & MST_DSK_CHG) {
- mcdDiskChanged = 1;
- tocUpToDate = 0;
- mcd_invalidate_buffers();
- }
- read_immediately:
- if ((st & MST_DOOR_OPEN) || !(st & MST_READY)) {
- mcdDiskChanged = 1;
- tocUpToDate = 0;
- if (mcd_transfer_is_active) {
- mcd_state = MCD_S_START;
- goto immediately;
- }
- printk(KERN_INFO);
- printk((st & MST_DOOR_OPEN) ?
- "mcd: door openn" :
- "mcd: disk removedn");
- mcd_state = MCD_S_IDLE;
- while (CURRENT_VALID)
- end_request(0);
- goto out;
- }
- if (CURRENT_VALID) {
- struct mcd_Play_msf msf;
- mcd_next_bn = CURRENT->sector / 4;
- hsg2msf(mcd_next_bn, &msf.start);
- msf.end.min = ~0;
- msf.end.sec = ~0;
- msf.end.frame = ~0;
- sendMcdCmd(MCMD_DATA_READ, &msf);
- mcd_state = MCD_S_DATA;
- McdTimeout = READ_TIMEOUT;
- } else {
- mcd_state = MCD_S_STOP;
- goto immediately;
- }
- }
- break;
- case MCD_S_DATA:
- test3(printk("MCD_S_DATAn"));
- st = inb(MCDPORT(1)) & (MFL_STATUSorDATA);
- data_immediately:
- test5(printk("Status %02xn", st))
- switch (st) {
- case MFL_DATA:
- #ifdef WARN_IF_READ_FAILURE
- if (McdTries == 5)
- printk(KERN_WARNING "mcd: read of block %d failedn",
- mcd_next_bn);
- #endif
- if (!McdTries--) {
- printk(KERN_ERR "mcd: read of block %d failed, giving upn", mcd_next_bn);
- if (mcd_transfer_is_active) {
- McdTries = 0;
- break;
- }
- if (CURRENT_VALID)
- end_request(0);
- McdTries = 5;
- }
- mcd_state = MCD_S_START;
- McdTimeout = READ_TIMEOUT;
- goto immediately;
- case MFL_STATUSorDATA:
- break;
- default:
- McdTries = 5;
- if (!CURRENT_VALID && mcd_buf_in == mcd_buf_out) {
- mcd_state = MCD_S_STOP;
- goto immediately;
- }
- mcd_buf_bn[mcd_buf_in] = -1;
- insb(MCDPORT(0), mcd_buf + 2048 * mcd_buf_in,
- 2048);
- mcd_buf_bn[mcd_buf_in] = mcd_next_bn++;
- if (mcd_buf_out == -1)
- mcd_buf_out = mcd_buf_in;
- mcd_buf_in = mcd_buf_in + 1 == MCD_BUF_SIZ ? 0 : mcd_buf_in + 1;
- if (!mcd_transfer_is_active) {
- while (CURRENT_VALID) {
- mcd_transfer();
- if (CURRENT->nr_sectors == 0)
- end_request(1);
- else
- break;
- }
- }
- if (CURRENT_VALID
- && (CURRENT->sector / 4 < mcd_next_bn ||
- CURRENT->sector / 4 > mcd_next_bn + 16)) {
- mcd_state = MCD_S_STOP;
- goto immediately;
- }
- McdTimeout = READ_TIMEOUT;
- {
- int count = QUICK_LOOP_COUNT;
- while (count--) {
- QUICK_LOOP_DELAY;
- if ((st = (inb(MCDPORT(1))) & (MFL_STATUSorDATA)) != (MFL_STATUSorDATA)) {
- test4(printk(" %d ", QUICK_LOOP_COUNT - count));
- goto data_immediately;
- }
- }
- test4(printk("ended "));
- }
- break;
- }
- break;
- case MCD_S_STOP:
- test3(printk("MCD_S_STOPn"));
- if (!mitsumi_bug_93_wait)
- goto do_not_work_around_mitsumi_bug_93_1;
- McdTimeout = mitsumi_bug_93_wait;
- mcd_state = 9 + 3 + 1;
- break;
- case 9 + 3 + 1:
- if (McdTimeout)
- break;
- do_not_work_around_mitsumi_bug_93_1:
- outb(MCMD_STOP, MCDPORT(0));
- if ((inb(MCDPORT(1)) & MFL_STATUSorDATA) == MFL_STATUS) {
- int i = 4096;
- do {
- inb(MCDPORT(0));
- } while ((inb(MCDPORT(1)) & MFL_STATUSorDATA) == MFL_STATUS && --i);
- outb(MCMD_STOP, MCDPORT(0));
- if ((inb(MCDPORT(1)) & MFL_STATUSorDATA) == MFL_STATUS) {
- i = 4096;
- do {
- inb(MCDPORT(0));
- } while ((inb(MCDPORT(1)) & MFL_STATUSorDATA) == MFL_STATUS && --i);
- outb(MCMD_STOP, MCDPORT(0));
- }
- }
- mcd_state = MCD_S_STOPPING;
- McdTimeout = 1000;
- break;
- case MCD_S_STOPPING:
- test3(printk("MCD_S_STOPPINGn"));
- if ((st = mcdStatus()) == -1 && McdTimeout)
- break;
- if ((st != -1) && (st & MST_DSK_CHG)) {
- mcdDiskChanged = 1;
- tocUpToDate = 0;
- mcd_invalidate_buffers();
- }
- if (!mitsumi_bug_93_wait)
- goto do_not_work_around_mitsumi_bug_93_2;
- McdTimeout = mitsumi_bug_93_wait;
- mcd_state = 9 + 3 + 2;
- break;
- case 9 + 3 + 2:
- if (McdTimeout)
- break;
- st = -1;
- do_not_work_around_mitsumi_bug_93_2:
- test3(printk("CURRENT_VALID %d mcd_mode %dn", CURRENT_VALID, mcd_mode));
- if (CURRENT_VALID) {
- if (st != -1) {
- if (mcd_mode == 1)
- goto read_immediately;
- else
- goto set_mode_immediately;
- } else {
- mcd_state = MCD_S_START;
- McdTimeout = 1;
- }
- } else {
- mcd_state = MCD_S_IDLE;
- goto out;
- }
- break;
- default:
- printk(KERN_ERR "mcd: invalid state %dn", mcd_state);
- goto out;
- }
- ret:
- if (!McdTimeout--) {
- printk(KERN_WARNING "mcd: timeout in state %dn", mcd_state);
- mcd_state = MCD_S_STOP;
- }
- mcd_timer.function = mcd_poll;
- mod_timer(&mcd_timer, jiffies + 1);
- out:
- return;
- }
- static void mcd_invalidate_buffers(void)
- {
- int i;
- for (i = 0; i < MCD_BUF_SIZ; ++i)
- mcd_buf_bn[i] = -1;
- mcd_buf_out = -1;
- }
- /*
- * Open the device special file. Check that a disk is in.
- */
- static int mcd_open(struct cdrom_device_info *cdi, int purpose)
- {
- int st, count = 0;
- if (mcdPresent == 0)
- return -ENXIO; /* no hardware */
- if (mcd_open_count || mcd_state != MCD_S_IDLE)
- goto bump_count;
- mcd_invalidate_buffers();
- do {
- st = statusCmd(); /* check drive status */
- if (st == -1)
- goto err_out; /* drive doesn't respond */
- if ((st & MST_READY) == 0) { /* no disk? wait a sec... */
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(HZ);
- }
- } while (((st & MST_READY) == 0) && count++ < MCD_RETRY_ATTEMPTS);
- if (updateToc() < 0)
- goto err_out;
- bump_count:
- ++mcd_open_count;
- return 0;
- err_out:
- return -EIO;
- }
- /*
- * On close, we flush all mcd blocks from the buffer cache.
- */
- static void mcd_release(struct cdrom_device_info *cdi)
- {
- if (!--mcd_open_count) {
- mcd_invalidate_buffers();
- }
- }
- /* This routine gets called during initialization if things go wrong,
- * and is used in mcd_exit as well. */
- static void cleanup(int level)
- {
- switch (level) {
- case 3:
- if (unregister_cdrom(&mcd_info)) {
- printk(KERN_WARNING "Can't unregister cdrom mcdn");
- return;
- }
- free_irq(mcd_irq, NULL);
- case 2:
- release_region(mcd_port, 4);
- case 1:
- if (devfs_unregister_blkdev(MAJOR_NR, "mcd")) {
- printk(KERN_WARNING "Can't unregister major mcdn");
- return;
- }
- blk_cleanup_queue(BLK_DEFAULT_QUEUE(MAJOR_NR));
- default:;
- }
- }
- /*
- * Test for presence of drive and initialize it. Called at boot time.
- */
- int __init mcd_init(void)
- {
- int count;
- unsigned char result[3];
- char msg[80];
- if (mcd_port <= 0 || mcd_irq <= 0) {
- printk(KERN_INFO "mcd: not probing.n");
- return -EIO;
- }
- if (devfs_register_blkdev(MAJOR_NR, "mcd", &mcd_bdops) != 0) {
- printk(KERN_ERR "mcd: Unable to get major %d for Mitsumi CD-ROMn", MAJOR_NR);
- return -EIO;
- }
- if (check_region(mcd_port, 4)) {
- cleanup(1);
- printk(KERN_ERR "mcd: Initialization failed, I/O port (%X) already in usen", mcd_port);
- return -EIO;
- }
- blksize_size[MAJOR_NR] = mcd_blocksizes;
- blk_init_queue(BLK_DEFAULT_QUEUE(MAJOR_NR), DEVICE_REQUEST);
- read_ahead[MAJOR_NR] = 4;
- /* check for card */
- outb(0, MCDPORT(1)); /* send reset */
- for (count = 0; count < 2000000; count++)
- (void) inb(MCDPORT(1)); /* delay a bit */
- outb(0x40, MCDPORT(0)); /* send get-stat cmd */
- for (count = 0; count < 2000000; count++)
- if (!(inb(MCDPORT(1)) & MFL_STATUS))
- break;
- if (count >= 2000000) {
- printk(KERN_INFO "mcd: initialisation failed - No mcd device at 0x%x irq %dn",
- mcd_port, mcd_irq);
- cleanup(1);
- return -EIO;
- }
- count = inb(MCDPORT(0)); /* pick up the status */
- outb(MCMD_GET_VERSION, MCDPORT(0));
- for (count = 0; count < 3; count++)
- if (getValue(result + count)) {
- printk(KERN_ERR "mcd: mitsumi get version failed at 0x%xn",
- mcd_port);
- cleanup(1);
- return -EIO;
- }
- if (result[0] == result[1] && result[1] == result[2]) {
- cleanup(1);
- return -EIO;
- }
- mcdVersion = result[2];
- if (mcdVersion >= 4)
- outb(4, MCDPORT(2)); /* magic happens */
- /* don't get the IRQ until we know for sure the drive is there */
- if (request_irq(mcd_irq, mcd_interrupt, SA_INTERRUPT, "Mitsumi CD", NULL)) {
- printk(KERN_ERR "mcd: Unable to get IRQ%d for Mitsumi CD-ROMn", mcd_irq);
- cleanup(1);
- return -EIO;
- }
- if (result[1] == 'D') {
- MCMD_DATA_READ = MCMD_2X_READ;
- /* Added flag to drop to 1x speed if too many errors */
- mcdDouble = 1;
- } else
- mcd_info.speed = 1;
- sprintf(msg, " mcd: Mitsumi %s Speed CD-ROM at port=0x%x,"
- " irq=%dn", mcd_info.speed == 1 ? "Single" : "Double",
- mcd_port, mcd_irq);
- request_region(mcd_port, 4, "mcd");
- outb(MCMD_CONFIG_DRIVE, MCDPORT(0));
- outb(0x02, MCDPORT(0));
- outb(0x00, MCDPORT(0));
- getValue(result);
- outb(MCMD_CONFIG_DRIVE, MCDPORT(0));
- outb(0x10, MCDPORT(0));
- outb(0x04, MCDPORT(0));
- getValue(result);
- mcd_invalidate_buffers();
- mcdPresent = 1;
- mcd_info.dev = MKDEV(MAJOR_NR, 0);
- if (register_cdrom(&mcd_info) != 0) {
- printk(KERN_ERR "mcd: Unable to register Mitsumi CD-ROM.n");
- cleanup(3);
- return -EIO;
- }
- devfs_plain_cdrom(&mcd_info, &mcd_bdops);
- printk(msg);
- return 0;
- }
- static void hsg2msf(long hsg, struct msf *msf)
- {
- hsg += 150;
- msf->min = hsg / 4500;
- hsg %= 4500;
- msf->sec = hsg / 75;
- msf->frame = hsg % 75;
- bin2bcd(&msf->min); /* convert to BCD */
- bin2bcd(&msf->sec);
- bin2bcd(&msf->frame);
- }
- static void bin2bcd(unsigned char *p)
- {
- int u, t;
- u = *p % 10;
- t = *p / 10;
- *p = u | (t << 4);
- }
- static int bcd2bin(unsigned char bcd)
- {
- return (bcd >> 4) * 10 + (bcd & 0xF);
- }
- /*
- * See if a status is ready from the drive and return it
- * if it is ready.
- */
- static int mcdStatus(void)
- {
- int i;
- int st;
- st = inb(MCDPORT(1)) & MFL_STATUS;
- if (!st) {
- i = inb(MCDPORT(0)) & 0xFF;
- return i;
- } else
- return -1;
- }
- /*
- * Send a play or read command to the drive
- */
- static void sendMcdCmd(int cmd, struct mcd_Play_msf *params)
- {
- outb(cmd, MCDPORT(0));
- outb(params->start.min, MCDPORT(0));
- outb(params->start.sec, MCDPORT(0));
- outb(params->start.frame, MCDPORT(0));
- outb(params->end.min, MCDPORT(0));
- outb(params->end.sec, MCDPORT(0));
- outb(params->end.frame, MCDPORT(0));
- }
- /*
- * Timer interrupt routine to test for status ready from the drive.
- * (see the next routine)
- */
- static void mcdStatTimer(unsigned long dummy)
- {
- if (!(inb(MCDPORT(1)) & MFL_STATUS)) {
- wake_up(&mcd_waitq);
- return;
- }
- McdTimeout--;
- if (McdTimeout <= 0) {
- wake_up(&mcd_waitq);
- return;
- }
- mcd_timer.function = mcdStatTimer;
- mod_timer(&mcd_timer, jiffies + 1);
- }
- /*
- * Wait for a status to be returned from the drive. The actual test
- * (see routine above) is done by the timer interrupt to avoid
- * excessive rescheduling.
- */
- static int getMcdStatus(int timeout)
- {
- int st;
- McdTimeout = timeout;
- mcd_timer.function = mcdStatTimer;
- mod_timer(&mcd_timer, jiffies + 1);
- sleep_on(&mcd_waitq);
- if (McdTimeout <= 0)
- return -1;
- st = inb(MCDPORT(0)) & 0xFF;
- if (st == 0xFF)
- return -1;
- if ((st & MST_BUSY) == 0 && audioStatus == CDROM_AUDIO_PLAY)
- /* XXX might be an error? look at q-channel? */
- audioStatus = CDROM_AUDIO_COMPLETED;
- if (st & MST_DSK_CHG) {
- mcdDiskChanged = 1;
- tocUpToDate = 0;
- audioStatus = CDROM_AUDIO_NO_STATUS;
- }
- return st;
- }
- /* gives current state of the drive This function is quite unreliable,
- and should probably be rewritten by someone, eventually... */
- int mcd_drive_status(struct cdrom_device_info *cdi, int slot_nr)
- {
- int st;
- st = statusCmd(); /* check drive status */
- if (st == -1)
- return -EIO; /* drive doesn't respond */
- if ((st & MST_READY))
- return CDS_DISC_OK;
- if ((st & MST_DOOR_OPEN))
- return CDS_TRAY_OPEN;
- if ((st & MST_DSK_CHG))
- return CDS_NO_DISC;
- if ((st & MST_BUSY))
- return CDS_DRIVE_NOT_READY;
- return -EIO;
- }
- /*
- * Read a value from the drive.
- */
- static int getValue(unsigned char *result)
- {
- int count;
- int s;
- for (count = 0; count < 2000; count++)
- if (!(inb(MCDPORT(1)) & MFL_STATUS))
- break;
- if (count >= 2000) {
- printk("mcd: getValue timeoutn");
- return -1;
- }
- s = inb(MCDPORT(0)) & 0xFF;
- *result = (unsigned char) s;
- return 0;
- }
- /*
- * Read the current Q-channel info. Also used for reading the
- * table of contents.
- */
- int GetQChannelInfo(struct mcd_Toc *qp)
- {
- unsigned char notUsed;
- int retry;
- for (retry = 0; retry < MCD_RETRY_ATTEMPTS; retry++) {
- outb(MCMD_GET_Q_CHANNEL, MCDPORT(0));
- if (getMcdStatus(MCD_STATUS_DELAY) != -1)
- break;
- }
- if (retry >= MCD_RETRY_ATTEMPTS)
- return -1;
- if (getValue(&qp->ctrl_addr) < 0)
- return -1;
- if (getValue(&qp->track) < 0)
- return -1;
- if (getValue(&qp->pointIndex) < 0)
- return -1;
- if (getValue(&qp->trackTime.min) < 0)
- return -1;
- if (getValue(&qp->trackTime.sec) < 0)
- return -1;
- if (getValue(&qp->trackTime.frame) < 0)
- return -1;
- if (getValue(¬Used) < 0)
- return -1;
- if (getValue(&qp->diskTime.min) < 0)
- return -1;
- if (getValue(&qp->diskTime.sec) < 0)
- return -1;
- if (getValue(&qp->diskTime.frame) < 0)
- return -1;
- return 0;
- }
- /*
- * Read the table of contents (TOC) and TOC header if necessary
- */
- static int updateToc(void)
- {
- if (tocUpToDate)
- return 0;
- if (GetDiskInfo() < 0)
- return -EIO;
- if (GetToc() < 0)
- return -EIO;
- tocUpToDate = 1;
- return 0;
- }
- /*
- * Read the table of contents header
- */
- static int GetDiskInfo(void)
- {
- int retry;
- for (retry = 0; retry < MCD_RETRY_ATTEMPTS; retry++) {
- outb(MCMD_GET_DISK_INFO, MCDPORT(0));
- if (getMcdStatus(MCD_STATUS_DELAY) != -1)
- break;
- }
- if (retry >= MCD_RETRY_ATTEMPTS)
- return -1;
- if (getValue(&DiskInfo.first) < 0)
- return -1;
- if (getValue(&DiskInfo.last) < 0)
- return -1;
- DiskInfo.first = bcd2bin(DiskInfo.first);
- DiskInfo.last = bcd2bin(DiskInfo.last);
- #ifdef MCD_DEBUG
- printk
- ("Disk Info: first %d last %d length %02x:%02x.%02x first %02x:%02x.%02xn",
- DiskInfo.first, DiskInfo.last, DiskInfo.diskLength.min,
- DiskInfo.diskLength.sec, DiskInfo.diskLength.frame,
- DiskInfo.firstTrack.min, DiskInfo.firstTrack.sec,
- DiskInfo.firstTrack.frame);
- #endif
- if (getValue(&DiskInfo.diskLength.min) < 0)
- return -1;
- if (getValue(&DiskInfo.diskLength.sec) < 0)
- return -1;
- if (getValue(&DiskInfo.diskLength.frame) < 0)
- return -1;
- if (getValue(&DiskInfo.firstTrack.min) < 0)
- return -1;
- if (getValue(&DiskInfo.firstTrack.sec) < 0)
- return -1;
- if (getValue(&DiskInfo.firstTrack.frame) < 0)
- return -1;
- return 0;
- }
- /*
- * Read the table of contents (TOC)
- */
- static int GetToc(void)
- {
- int i, px;
- int limit;
- int retry;
- struct mcd_Toc qInfo;
- for (i = 0; i < MAX_TRACKS; i++)
- Toc[i].pointIndex = 0;
- i = DiskInfo.last + 3;
- for (retry = 0; retry < MCD_RETRY_ATTEMPTS; retry++) {
- outb(MCMD_STOP, MCDPORT(0));
- if (getMcdStatus(MCD_STATUS_DELAY) != -1)
- break;
- }
- if (retry >= MCD_RETRY_ATTEMPTS)
- return -1;
- for (retry = 0; retry < MCD_RETRY_ATTEMPTS; retry++) {
- outb(MCMD_SET_MODE, MCDPORT(0));
- outb(0x05, MCDPORT(0)); /* mode: toc */
- mcd_mode = 0x05;
- if (getMcdStatus(MCD_STATUS_DELAY) != -1)
- break;
- }
- if (retry >= MCD_RETRY_ATTEMPTS)
- return -1;
- for (limit = 300; limit > 0; limit--) {
- if (GetQChannelInfo(&qInfo) < 0)
- break;
- px = bcd2bin(qInfo.pointIndex);
- if (px > 0 && px < MAX_TRACKS && qInfo.track == 0)
- if (Toc[px].pointIndex == 0) {
- Toc[px] = qInfo;
- i--;
- }
- if (i <= 0)
- break;
- }
- Toc[DiskInfo.last + 1].diskTime = DiskInfo.diskLength;
- for (retry = 0; retry < MCD_RETRY_ATTEMPTS; retry++) {
- outb(MCMD_SET_MODE, MCDPORT(0));
- outb(0x01, MCDPORT(0));
- mcd_mode = 1;
- if (getMcdStatus(MCD_STATUS_DELAY) != -1)
- break;
- }
- #ifdef MCD_DEBUG
- for (i = 1; i <= DiskInfo.last; i++)
- printk
- ("i = %2d ctl-adr = %02X track %2d px %02X %02X:%02X.%02X %02X:%02X.%02Xn",
- i, Toc[i].ctrl_addr, Toc[i].track, Toc[i].pointIndex,
- Toc[i].trackTime.min, Toc[i].trackTime.sec,
- Toc[i].trackTime.frame, Toc[i].diskTime.min,
- Toc[i].diskTime.sec, Toc[i].diskTime.frame);
- for (i = 100; i < 103; i++)
- printk
- ("i = %2d ctl-adr = %02X track %2d px %02X %02X:%02X.%02X %02X:%02X.%02Xn",
- i, Toc[i].ctrl_addr, Toc[i].track, Toc[i].pointIndex,
- Toc[i].trackTime.min, Toc[i].trackTime.sec,
- Toc[i].trackTime.frame, Toc[i].diskTime.min,
- Toc[i].diskTime.sec, Toc[i].diskTime.frame);
- #endif
- return limit > 0 ? 0 : -1;
- }
- void __exit mcd_exit(void)
- {
- cleanup(3);
- del_timer_sync(&mcd_timer);
- }
- #ifdef MODULE
- module_init(mcd_init);
- #endif
- module_exit(mcd_exit);
- MODULE_AUTHOR("Martin Harriss");
- MODULE_LICENSE("GPL");