2 pcd.c (c) 1997-8 Grant R. Guenther <grant@torque.net>
3 Under the terms of the GNU General Public License.
5 This is a high-level driver for parallel port ATAPI CD-ROM
6 drives based on chips supported by the paride module.
8 By default, the driver will autoprobe for a single parallel
9 port ATAPI CD-ROM drive, but if their individual parameters are
10 specified, the driver can handle up to 4 drives.
12 The behaviour of the pcd driver can be altered by setting
13 some parameters from the insmod command line. The following
14 parameters are adjustable:
16 drive0 These four arguments can be arrays of
17 drive1 1-6 integers as follows:
19 drive3 <prt>,<pro>,<uni>,<mod>,<slv>,<dly>
23 <prt> is the base of the parallel port address for
24 the corresponding drive. (required)
26 <pro> is the protocol number for the adapter that
27 supports this drive. These numbers are
28 logged by 'paride' when the protocol modules
29 are initialised. (0 if not given)
31 <uni> for those adapters that support chained
32 devices, this is the unit selector for the
33 chain of devices on the given port. It should
34 be zero for devices that don't support chaining.
37 <mod> this can be -1 to choose the best mode, or one
38 of the mode numbers supported by the adapter.
41 <slv> ATAPI CD-ROMs can be jumpered to master or slave.
42 Set this to 0 to choose the master drive, 1 to
43 choose the slave, -1 (the default) to choose the
46 <dly> some parallel ports require the driver to
47 go more slowly. -1 sets a default value that
48 should work with the chosen protocol. Otherwise,
49 set this to a small integer, the larger it is
50 the slower the port i/o. In some cases, setting
51 this to zero will speed up the device. (default -1)
53 major You may use this parameter to overide the
54 default major number (46) that this driver
55 will use. Be sure to change the device
58 name This parameter is a character string that
59 contains the name the kernel will use for this
60 device (in /proc output, for instance).
63 verbose This parameter controls the amount of logging
64 that the driver will do. Set it to 0 for
65 normal operation, 1 to see autoprobe progress
66 messages, or 2 to see additional debugging
69 nice This parameter controls the driver's use of
70 idle CPU time, at the expense of some speed.
72 If this driver is built into the kernel, you can use the
73 following kernel command line parameters, with the same values
74 as the corresponding module parameters listed above:
82 In addition, you can use the parameter pcd.disable to disable
89 1.01 GRG 1998.01.24 Added test unit ready support
90 1.02 GRG 1998.05.06 Changes to pcd_completion, ready_wait,
91 and loosen interpretation of ATAPI
92 standard for clearing error status.
93 Use spinlocks. Eliminate sti().
94 1.03 GRG 1998.06.16 Eliminated an Ugh
95 1.04 GRG 1998.08.15 Added extra debugging, improvements to
96 pcd_completion, use HZ in loop timing
97 1.05 GRG 1998.08.16 Conformed to "Uniform CD-ROM" standard
98 1.06 GRG 1998.08.19 Added audio ioctl support
99 1.07 GRG 1998.09.24 Increased reset timeout, added jumbo support
103 #define PCD_VERSION "1.07"
105 #define PCD_NAME "pcd"
108 /* Here are things one can override from the insmod command.
109 Most are autoprobed by paride unless set here. Verbose is off
114 static int verbose = 0;
115 static int major = PCD_MAJOR;
116 static char *name = PCD_NAME;
118 static int disable = 0;
120 static int drive0[6] = { 0, 0, 0, -1, -1, -1 };
121 static int drive1[6] = { 0, 0, 0, -1, -1, -1 };
122 static int drive2[6] = { 0, 0, 0, -1, -1, -1 };
123 static int drive3[6] = { 0, 0, 0, -1, -1, -1 };
125 static int (*drives[4])[6] = {&drive0, &drive1, &drive2, &drive3};
126 static int pcd_drive_count;
128 enum {D_PRT, D_PRO, D_UNI, D_MOD, D_SLV, D_DLY};
130 /* end of parameters */
132 #include <linux/module.h>
133 #include <linux/init.h>
134 #include <linux/errno.h>
135 #include <linux/fs.h>
136 #include <linux/kernel.h>
137 #include <linux/delay.h>
138 #include <linux/cdrom.h>
139 #include <linux/spinlock.h>
140 #include <linux/blkdev.h>
141 #include <linux/mutex.h>
142 #include <asm/uaccess.h>
144 static DEFINE_MUTEX(pcd_mutex);
145 static DEFINE_SPINLOCK(pcd_lock);
147 module_param(verbose, int, 0644);
148 module_param(major, int, 0);
149 module_param(name, charp, 0);
150 module_param(nice, int, 0);
151 module_param_array(drive0, int, NULL, 0);
152 module_param_array(drive1, int, NULL, 0);
153 module_param_array(drive2, int, NULL, 0);
154 module_param_array(drive3, int, NULL, 0);
159 #define PCD_RETRIES 5
160 #define PCD_TMO 800 /* timeout in jiffies */
161 #define PCD_DELAY 50 /* spin delay in uS */
162 #define PCD_READY_TMO 20 /* in seconds */
163 #define PCD_RESET_TMO 100 /* in tenths of a second */
165 #define PCD_SPIN (1000000*PCD_TMO)/(HZ*PCD_DELAY)
169 #define IDE_READY 0x40
170 #define IDE_BUSY 0x80
172 static int pcd_open(struct cdrom_device_info *cdi, int purpose);
173 static void pcd_release(struct cdrom_device_info *cdi);
174 static int pcd_drive_status(struct cdrom_device_info *cdi, int slot_nr);
175 static unsigned int pcd_check_events(struct cdrom_device_info *cdi,
176 unsigned int clearing, int slot_nr);
177 static int pcd_tray_move(struct cdrom_device_info *cdi, int position);
178 static int pcd_lock_door(struct cdrom_device_info *cdi, int lock);
179 static int pcd_drive_reset(struct cdrom_device_info *cdi);
180 static int pcd_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn);
181 static int pcd_audio_ioctl(struct cdrom_device_info *cdi,
182 unsigned int cmd, void *arg);
183 static int pcd_packet(struct cdrom_device_info *cdi,
184 struct packet_command *cgc);
186 static int pcd_detect(void);
187 static void pcd_probe_capabilities(void);
188 static void do_pcd_read_drq(void);
189 static void do_pcd_request(struct request_queue * q);
190 static void do_pcd_read(void);
193 struct pi_adapter pia; /* interface to paride layer */
194 struct pi_adapter *pi;
195 int drive; /* master/slave */
196 int last_sense; /* result of last request sense */
197 int changed; /* media change seen */
198 int present; /* does this unit exist ? */
199 char *name; /* pcd0, pcd1, etc */
200 struct cdrom_device_info info; /* uniform cdrom interface */
201 struct gendisk *disk;
204 static struct pcd_unit pcd[PCD_UNITS];
206 static char pcd_scratch[64];
207 static char pcd_buffer[2048]; /* raw block buffer */
208 static int pcd_bufblk = -1; /* block in buffer, in CD units,
209 -1 for nothing there. See also
213 /* the variables below are used mainly in the I/O request engine, which
214 processes only one request at a time.
217 static struct pcd_unit *pcd_current; /* current request's drive */
218 static struct request *pcd_req;
219 static int pcd_retries; /* retries on current request */
220 static int pcd_busy; /* request being processed ? */
221 static int pcd_sector; /* address of next requested sector */
222 static int pcd_count; /* number of blocks still to do */
223 static char *pcd_buf; /* buffer for request in progress */
224 static void *par_drv; /* reference of parport driver */
226 /* kernel glue structures */
228 static int pcd_block_open(struct block_device *bdev, fmode_t mode)
230 struct pcd_unit *cd = bdev->bd_disk->private_data;
233 check_disk_change(bdev);
235 mutex_lock(&pcd_mutex);
236 ret = cdrom_open(&cd->info, bdev, mode);
237 mutex_unlock(&pcd_mutex);
242 static void pcd_block_release(struct gendisk *disk, fmode_t mode)
244 struct pcd_unit *cd = disk->private_data;
245 mutex_lock(&pcd_mutex);
246 cdrom_release(&cd->info, mode);
247 mutex_unlock(&pcd_mutex);
250 static int pcd_block_ioctl(struct block_device *bdev, fmode_t mode,
251 unsigned cmd, unsigned long arg)
253 struct pcd_unit *cd = bdev->bd_disk->private_data;
256 mutex_lock(&pcd_mutex);
257 ret = cdrom_ioctl(&cd->info, bdev, mode, cmd, arg);
258 mutex_unlock(&pcd_mutex);
263 static unsigned int pcd_block_check_events(struct gendisk *disk,
264 unsigned int clearing)
266 struct pcd_unit *cd = disk->private_data;
267 return cdrom_check_events(&cd->info, clearing);
270 static const struct block_device_operations pcd_bdops = {
271 .owner = THIS_MODULE,
272 .open = pcd_block_open,
273 .release = pcd_block_release,
274 .ioctl = pcd_block_ioctl,
275 .check_events = pcd_block_check_events,
278 static struct cdrom_device_ops pcd_dops = {
280 .release = pcd_release,
281 .drive_status = pcd_drive_status,
282 .check_events = pcd_check_events,
283 .tray_move = pcd_tray_move,
284 .lock_door = pcd_lock_door,
285 .get_mcn = pcd_get_mcn,
286 .reset = pcd_drive_reset,
287 .audio_ioctl = pcd_audio_ioctl,
288 .generic_packet = pcd_packet,
289 .capability = CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK |
290 CDC_MCN | CDC_MEDIA_CHANGED | CDC_RESET |
291 CDC_PLAY_AUDIO | CDC_GENERIC_PACKET | CDC_CD_R |
295 static void pcd_init_units(void)
301 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
302 struct gendisk *disk = alloc_disk(1);
310 cd->drive = (*drives[unit])[D_SLV];
311 if ((*drives[unit])[D_PRT])
314 cd->name = &cd->info.name[0];
315 snprintf(cd->name, sizeof(cd->info.name), "%s%d", name, unit);
316 cd->info.ops = &pcd_dops;
317 cd->info.handle = cd;
319 cd->info.capacity = 1;
322 disk->first_minor = unit;
323 strcpy(disk->disk_name, cd->name); /* umm... */
324 disk->fops = &pcd_bdops;
325 disk->flags = GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
329 static int pcd_open(struct cdrom_device_info *cdi, int purpose)
331 struct pcd_unit *cd = cdi->handle;
337 static void pcd_release(struct cdrom_device_info *cdi)
341 static inline int status_reg(struct pcd_unit *cd)
343 return pi_read_regr(cd->pi, 1, 6);
346 static inline int read_reg(struct pcd_unit *cd, int reg)
348 return pi_read_regr(cd->pi, 0, reg);
351 static inline void write_reg(struct pcd_unit *cd, int reg, int val)
353 pi_write_regr(cd->pi, 0, reg, val);
356 static int pcd_wait(struct pcd_unit *cd, int go, int stop, char *fun, char *msg)
361 while ((((r = status_reg(cd)) & go) || (stop && (!(r & stop))))
365 if ((r & (IDE_ERR & stop)) || (j > PCD_SPIN)) {
372 printk("%s: %s %s: alt=0x%x stat=0x%x err=0x%x"
373 " loop=%d phase=%d\n",
374 cd->name, fun, msg, r, s, e, j, p);
380 static int pcd_command(struct pcd_unit *cd, char *cmd, int dlen, char *fun)
384 write_reg(cd, 6, 0xa0 + 0x10 * cd->drive);
386 if (pcd_wait(cd, IDE_BUSY | IDE_DRQ, 0, fun, "before command")) {
387 pi_disconnect(cd->pi);
391 write_reg(cd, 4, dlen % 256);
392 write_reg(cd, 5, dlen / 256);
393 write_reg(cd, 7, 0xa0); /* ATAPI packet command */
395 if (pcd_wait(cd, IDE_BUSY, IDE_DRQ, fun, "command DRQ")) {
396 pi_disconnect(cd->pi);
400 if (read_reg(cd, 2) != 1) {
401 printk("%s: %s: command phase error\n", cd->name, fun);
402 pi_disconnect(cd->pi);
406 pi_write_block(cd->pi, cmd, 12);
411 static int pcd_completion(struct pcd_unit *cd, char *buf, char *fun)
413 int r, d, p, n, k, j;
419 if (!pcd_wait(cd, IDE_BUSY, IDE_DRQ | IDE_READY | IDE_ERR,
420 fun, "completion")) {
422 while (read_reg(cd, 7) & IDE_DRQ) {
423 d = read_reg(cd, 4) + 256 * read_reg(cd, 5);
424 n = (d + 3) & 0xfffc;
425 p = read_reg(cd, 2) & 3;
427 if ((p == 2) && (n > 0) && (j == 0)) {
428 pi_read_block(cd->pi, buf, n);
430 printk("%s: %s: Read %d bytes\n",
437 ("%s: %s: Unexpected phase %d, d=%d, k=%d\n",
438 cd->name, fun, p, d, k);
441 "%s: WARNING: ATAPI phase errors\n",
446 printk("%s: Stuck DRQ\n", cd->name);
450 (cd, IDE_BUSY, IDE_DRQ | IDE_READY | IDE_ERR, fun,
458 pi_disconnect(cd->pi);
463 static void pcd_req_sense(struct pcd_unit *cd, char *fun)
465 char rs_cmd[12] = { 0x03, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0 };
469 r = pcd_command(cd, rs_cmd, 16, "Request sense");
472 pcd_completion(cd, buf, "Request sense");
478 printk("%s: %s: Sense key: %x, ASC: %x, ASQ: %x\n",
479 cd->name, fun, buf[2] & 0xf, buf[12], buf[13]);
482 c | ((buf[12] & 0xff) << 8) | ((buf[13] & 0xff) << 16);
484 if ((c == 2) || (c == 6))
488 static int pcd_atapi(struct pcd_unit *cd, char *cmd, int dlen, char *buf, char *fun)
492 r = pcd_command(cd, cmd, dlen, fun);
495 r = pcd_completion(cd, buf, fun);
497 pcd_req_sense(cd, fun);
502 static int pcd_packet(struct cdrom_device_info *cdi, struct packet_command *cgc)
504 return pcd_atapi(cdi->handle, cgc->cmd, cgc->buflen, cgc->buffer,
508 #define DBMSG(msg) ((verbose>1)?(msg):NULL)
510 static unsigned int pcd_check_events(struct cdrom_device_info *cdi,
511 unsigned int clearing, int slot_nr)
513 struct pcd_unit *cd = cdi->handle;
514 int res = cd->changed;
517 return res ? DISK_EVENT_MEDIA_CHANGE : 0;
520 static int pcd_lock_door(struct cdrom_device_info *cdi, int lock)
522 char un_cmd[12] = { 0x1e, 0, 0, 0, lock, 0, 0, 0, 0, 0, 0, 0 };
524 return pcd_atapi(cdi->handle, un_cmd, 0, pcd_scratch,
525 lock ? "lock door" : "unlock door");
528 static int pcd_tray_move(struct cdrom_device_info *cdi, int position)
530 char ej_cmd[12] = { 0x1b, 0, 0, 0, 3 - position, 0, 0, 0, 0, 0, 0, 0 };
532 return pcd_atapi(cdi->handle, ej_cmd, 0, pcd_scratch,
533 position ? "eject" : "close tray");
536 static void pcd_sleep(int cs)
538 schedule_timeout_interruptible(cs);
541 static int pcd_reset(struct pcd_unit *cd)
544 int expect[5] = { 1, 1, 1, 0x14, 0xeb };
547 write_reg(cd, 6, 0xa0 + 0x10 * cd->drive);
550 pcd_sleep(20 * HZ / 1000); /* delay a bit */
553 while ((k++ < PCD_RESET_TMO) && (status_reg(cd) & IDE_BUSY))
557 for (i = 0; i < 5; i++)
558 flg &= (read_reg(cd, i + 1) == expect[i]);
561 printk("%s: Reset (%d) signature = ", cd->name, k);
562 for (i = 0; i < 5; i++)
563 printk("%3x", read_reg(cd, i + 1));
565 printk(" (incorrect)");
569 pi_disconnect(cd->pi);
573 static int pcd_drive_reset(struct cdrom_device_info *cdi)
575 return pcd_reset(cdi->handle);
578 static int pcd_ready_wait(struct pcd_unit *cd, int tmo)
580 char tr_cmd[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
586 pcd_atapi(cd, tr_cmd, 0, NULL, DBMSG("test unit ready"));
590 if (!(((p & 0xffff) == 0x0402) || ((p & 0xff) == 6)))
595 return 0x000020; /* timeout */
598 static int pcd_drive_status(struct cdrom_device_info *cdi, int slot_nr)
600 char rc_cmd[12] = { 0x25, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
601 struct pcd_unit *cd = cdi->handle;
603 if (pcd_ready_wait(cd, PCD_READY_TMO))
604 return CDS_DRIVE_NOT_READY;
605 if (pcd_atapi(cd, rc_cmd, 8, pcd_scratch, DBMSG("check media")))
610 static int pcd_identify(struct pcd_unit *cd, char *id)
613 char id_cmd[12] = { 0x12, 0, 0, 0, 36, 0, 0, 0, 0, 0, 0, 0 };
617 s = pcd_atapi(cd, id_cmd, 36, pcd_buffer, "identify");
621 if ((pcd_buffer[0] & 0x1f) != 5) {
623 printk("%s: %s is not a CD-ROM\n",
624 cd->name, cd->drive ? "Slave" : "Master");
627 memcpy(id, pcd_buffer + 16, 16);
630 while ((k >= 0) && (id[k] <= 0x20)) {
635 printk("%s: %s: %s\n", cd->name, cd->drive ? "Slave" : "Master", id);
641 * returns 0, with id set if drive is detected
642 * -1, if drive detection failed
644 static int pcd_probe(struct pcd_unit *cd, int ms, char *id)
647 for (cd->drive = 0; cd->drive <= 1; cd->drive++)
648 if (!pcd_reset(cd) && !pcd_identify(cd, id))
652 if (!pcd_reset(cd) && !pcd_identify(cd, id))
658 static void pcd_probe_capabilities(void)
662 char cmd[12] = { 0x5a, 1 << 3, 0x2a, 0, 0, 0, 0, 18, 0, 0, 0, 0 };
665 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
668 r = pcd_atapi(cd, cmd, 18, buffer, "mode sense capabilities");
671 /* we should now have the cap page */
672 if ((buffer[11] & 1) == 0)
673 cd->info.mask |= CDC_CD_R;
674 if ((buffer[11] & 2) == 0)
675 cd->info.mask |= CDC_CD_RW;
676 if ((buffer[12] & 1) == 0)
677 cd->info.mask |= CDC_PLAY_AUDIO;
678 if ((buffer[14] & 1) == 0)
679 cd->info.mask |= CDC_LOCK;
680 if ((buffer[14] & 8) == 0)
681 cd->info.mask |= CDC_OPEN_TRAY;
682 if ((buffer[14] >> 6) == 0)
683 cd->info.mask |= CDC_CLOSE_TRAY;
687 static int pcd_detect(void)
693 printk("%s: %s version %s, major %d, nice %d\n",
694 name, name, PCD_VERSION, major, nice);
696 par_drv = pi_register_driver(name);
698 pr_err("failed to register %s driver\n", name);
703 if (pcd_drive_count == 0) { /* nothing spec'd - so autoprobe for 1 */
705 if (pi_init(cd->pi, 1, -1, -1, -1, -1, -1, pcd_buffer,
706 PI_PCD, verbose, cd->name)) {
707 if (!pcd_probe(cd, -1, id) && cd->disk) {
714 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
715 int *conf = *drives[unit];
718 if (!pi_init(cd->pi, 0, conf[D_PRT], conf[D_MOD],
719 conf[D_UNI], conf[D_PRO], conf[D_DLY],
720 pcd_buffer, PI_PCD, verbose, cd->name))
722 if (!pcd_probe(cd, conf[D_SLV], id) && cd->disk) {
732 printk("%s: No CD-ROM drive found\n", name);
733 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++)
735 pi_unregister_driver(par_drv);
739 /* I/O request processing */
740 static struct request_queue *pcd_queue;
742 static void do_pcd_request(struct request_queue * q)
748 pcd_req = blk_fetch_request(q);
753 if (rq_data_dir(pcd_req) == READ) {
754 struct pcd_unit *cd = pcd_req->rq_disk->private_data;
755 if (cd != pcd_current)
758 pcd_sector = blk_rq_pos(pcd_req);
759 pcd_count = blk_rq_cur_sectors(pcd_req);
760 pcd_buf = bio_data(pcd_req->bio);
762 ps_set_intr(do_pcd_read, NULL, 0, nice);
765 __blk_end_request_all(pcd_req, -EIO);
771 static inline void next_request(int err)
773 unsigned long saved_flags;
775 spin_lock_irqsave(&pcd_lock, saved_flags);
776 if (!__blk_end_request_cur(pcd_req, err))
779 do_pcd_request(pcd_queue);
780 spin_unlock_irqrestore(&pcd_lock, saved_flags);
783 static int pcd_ready(void)
785 return (((status_reg(pcd_current) & (IDE_BUSY | IDE_DRQ)) == IDE_DRQ));
788 static void pcd_transfer(void)
791 while (pcd_count && (pcd_sector / 4 == pcd_bufblk)) {
792 int o = (pcd_sector % 4) * 512;
793 memcpy(pcd_buf, pcd_buffer + o, 512);
800 static void pcd_start(void)
803 char rd_cmd[12] = { 0xa8, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 };
805 pcd_bufblk = pcd_sector / 4;
807 for (i = 0; i < 4; i++) {
808 rd_cmd[5 - i] = b & 0xff;
812 if (pcd_command(pcd_current, rd_cmd, 2048, "read block")) {
820 ps_set_intr(do_pcd_read_drq, pcd_ready, PCD_TMO, nice);
823 static void do_pcd_read(void)
833 pi_do_claimed(pcd_current->pi, pcd_start);
836 static void do_pcd_read_drq(void)
838 unsigned long saved_flags;
840 if (pcd_completion(pcd_current, pcd_buffer, "read block")) {
841 if (pcd_retries < PCD_RETRIES) {
844 pi_do_claimed(pcd_current->pi, pcd_start);
853 spin_lock_irqsave(&pcd_lock, saved_flags);
854 do_pcd_request(pcd_queue);
855 spin_unlock_irqrestore(&pcd_lock, saved_flags);
858 /* the audio_ioctl stuff is adapted from sr_ioctl.c */
860 static int pcd_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
862 struct pcd_unit *cd = cdi->handle;
866 case CDROMREADTOCHDR:
870 { GPCMD_READ_TOC_PMA_ATIP, 0, 0, 0, 0, 0, 0, 0, 12,
872 struct cdrom_tochdr *tochdr =
873 (struct cdrom_tochdr *) arg;
877 r = pcd_atapi(cd, cmd, 12, buffer, "read toc header");
879 tochdr->cdth_trk0 = buffer[2];
880 tochdr->cdth_trk1 = buffer[3];
885 case CDROMREADTOCENTRY:
889 { GPCMD_READ_TOC_PMA_ATIP, 0, 0, 0, 0, 0, 0, 0, 12,
892 struct cdrom_tocentry *tocentry =
893 (struct cdrom_tocentry *) arg;
894 unsigned char buffer[32];
898 (tocentry->cdte_format == CDROM_MSF ? 0x02 : 0);
899 cmd[6] = tocentry->cdte_track;
901 r = pcd_atapi(cd, cmd, 12, buffer, "read toc entry");
903 tocentry->cdte_ctrl = buffer[5] & 0xf;
904 tocentry->cdte_adr = buffer[5] >> 4;
905 tocentry->cdte_datamode =
906 (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
907 if (tocentry->cdte_format == CDROM_MSF) {
908 tocentry->cdte_addr.msf.minute = buffer[9];
909 tocentry->cdte_addr.msf.second = buffer[10];
910 tocentry->cdte_addr.msf.frame = buffer[11];
912 tocentry->cdte_addr.lba =
913 (((((buffer[8] << 8) + buffer[9]) << 8)
914 + buffer[10]) << 8) + buffer[11];
925 static int pcd_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
928 { GPCMD_READ_SUBCHANNEL, 0, 0x40, 2, 0, 0, 0, 0, 24, 0, 0, 0 };
931 if (pcd_atapi(cdi->handle, cmd, 24, buffer, "get mcn"))
934 memcpy(mcn->medium_catalog_number, buffer + 9, 13);
935 mcn->medium_catalog_number[13] = 0;
940 static int __init pcd_init(void)
953 /* get the atapi capabilities page */
954 pcd_probe_capabilities();
956 if (register_blkdev(major, name)) {
957 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++)
962 pcd_queue = blk_init_queue(do_pcd_request, &pcd_lock);
964 unregister_blkdev(major, name);
965 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++)
970 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
972 register_cdrom(&cd->info);
973 cd->disk->private_data = cd;
974 cd->disk->queue = pcd_queue;
982 static void __exit pcd_exit(void)
987 for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
989 del_gendisk(cd->disk);
991 unregister_cdrom(&cd->info);
995 blk_cleanup_queue(pcd_queue);
996 unregister_blkdev(major, name);
997 pi_unregister_driver(par_drv);
1000 MODULE_LICENSE("GPL");
1001 module_init(pcd_init)
1002 module_exit(pcd_exit)