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path: root/drivers/block/paride/pcd.c
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-rw-r--r--drivers/block/paride/pcd.c971
1 files changed, 971 insertions, 0 deletions
diff --git a/drivers/block/paride/pcd.c b/drivers/block/paride/pcd.c
new file mode 100644
index 00000000000..7289f67e956
--- /dev/null
+++ b/drivers/block/paride/pcd.c
@@ -0,0 +1,971 @@
+/*
+ pcd.c (c) 1997-8 Grant R. Guenther <grant@torque.net>
+ Under the terms of the GNU General Public License.
+
+ This is a high-level driver for parallel port ATAPI CD-ROM
+ drives based on chips supported by the paride module.
+
+ By default, the driver will autoprobe for a single parallel
+ port ATAPI CD-ROM drive, but if their individual parameters are
+ specified, the driver can handle up to 4 drives.
+
+ The behaviour of the pcd driver can be altered by setting
+ some parameters from the insmod command line. The following
+ parameters are adjustable:
+
+ drive0 These four arguments can be arrays of
+ drive1 1-6 integers as follows:
+ drive2
+ drive3 <prt>,<pro>,<uni>,<mod>,<slv>,<dly>
+
+ Where,
+
+ <prt> is the base of the parallel port address for
+ the corresponding drive. (required)
+
+ <pro> is the protocol number for the adapter that
+ supports this drive. These numbers are
+ logged by 'paride' when the protocol modules
+ are initialised. (0 if not given)
+
+ <uni> for those adapters that support chained
+ devices, this is the unit selector for the
+ chain of devices on the given port. It should
+ be zero for devices that don't support chaining.
+ (0 if not given)
+
+ <mod> this can be -1 to choose the best mode, or one
+ of the mode numbers supported by the adapter.
+ (-1 if not given)
+
+ <slv> ATAPI CD-ROMs can be jumpered to master or slave.
+ Set this to 0 to choose the master drive, 1 to
+ choose the slave, -1 (the default) to choose the
+ first drive found.
+
+ <dly> some parallel ports require the driver to
+ go more slowly. -1 sets a default value that
+ should work with the chosen protocol. Otherwise,
+ set this to a small integer, the larger it is
+ the slower the port i/o. In some cases, setting
+ this to zero will speed up the device. (default -1)
+
+ major You may use this parameter to overide the
+ default major number (46) that this driver
+ will use. Be sure to change the device
+ name as well.
+
+ name This parameter is a character string that
+ contains the name the kernel will use for this
+ device (in /proc output, for instance).
+ (default "pcd")
+
+ verbose This parameter controls the amount of logging
+ that the driver will do. Set it to 0 for
+ normal operation, 1 to see autoprobe progress
+ messages, or 2 to see additional debugging
+ output. (default 0)
+
+ nice This parameter controls the driver's use of
+ idle CPU time, at the expense of some speed.
+
+ If this driver is built into the kernel, you can use kernel
+ the following command line parameters, with the same values
+ as the corresponding module parameters listed above:
+
+ pcd.drive0
+ pcd.drive1
+ pcd.drive2
+ pcd.drive3
+ pcd.nice
+
+ In addition, you can use the parameter pcd.disable to disable
+ the driver entirely.
+
+*/
+
+/* Changes:
+
+ 1.01 GRG 1998.01.24 Added test unit ready support
+ 1.02 GRG 1998.05.06 Changes to pcd_completion, ready_wait,
+ and loosen interpretation of ATAPI
+ standard for clearing error status.
+ Use spinlocks. Eliminate sti().
+ 1.03 GRG 1998.06.16 Eliminated an Ugh
+ 1.04 GRG 1998.08.15 Added extra debugging, improvements to
+ pcd_completion, use HZ in loop timing
+ 1.05 GRG 1998.08.16 Conformed to "Uniform CD-ROM" standard
+ 1.06 GRG 1998.08.19 Added audio ioctl support
+ 1.07 GRG 1998.09.24 Increased reset timeout, added jumbo support
+
+*/
+
+#define PCD_VERSION "1.07"
+#define PCD_MAJOR 46
+#define PCD_NAME "pcd"
+#define PCD_UNITS 4
+
+/* Here are things one can override from the insmod command.
+ Most are autoprobed by paride unless set here. Verbose is off
+ by default.
+
+*/
+
+static int verbose = 0;
+static int major = PCD_MAJOR;
+static char *name = PCD_NAME;
+static int nice = 0;
+static int disable = 0;
+
+static int drive0[6] = { 0, 0, 0, -1, -1, -1 };
+static int drive1[6] = { 0, 0, 0, -1, -1, -1 };
+static int drive2[6] = { 0, 0, 0, -1, -1, -1 };
+static int drive3[6] = { 0, 0, 0, -1, -1, -1 };
+
+static int (*drives[4])[6] = {&drive0, &drive1, &drive2, &drive3};
+static int pcd_drive_count;
+
+enum {D_PRT, D_PRO, D_UNI, D_MOD, D_SLV, D_DLY};
+
+/* end of parameters */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/cdrom.h>
+#include <linux/spinlock.h>
+#include <linux/blkdev.h>
+#include <asm/uaccess.h>
+
+static spinlock_t pcd_lock;
+
+module_param(verbose, bool, 0644);
+module_param(major, int, 0);
+module_param(name, charp, 0);
+module_param(nice, int, 0);
+module_param_array(drive0, int, NULL, 0);
+module_param_array(drive1, int, NULL, 0);
+module_param_array(drive2, int, NULL, 0);
+module_param_array(drive3, int, NULL, 0);
+
+#include "paride.h"
+#include "pseudo.h"
+
+#define PCD_RETRIES 5
+#define PCD_TMO 800 /* timeout in jiffies */
+#define PCD_DELAY 50 /* spin delay in uS */
+#define PCD_READY_TMO 20 /* in seconds */
+#define PCD_RESET_TMO 100 /* in tenths of a second */
+
+#define PCD_SPIN (1000000*PCD_TMO)/(HZ*PCD_DELAY)
+
+#define IDE_ERR 0x01
+#define IDE_DRQ 0x08
+#define IDE_READY 0x40
+#define IDE_BUSY 0x80
+
+static int pcd_open(struct cdrom_device_info *cdi, int purpose);
+static void pcd_release(struct cdrom_device_info *cdi);
+static int pcd_drive_status(struct cdrom_device_info *cdi, int slot_nr);
+static int pcd_media_changed(struct cdrom_device_info *cdi, int slot_nr);
+static int pcd_tray_move(struct cdrom_device_info *cdi, int position);
+static int pcd_lock_door(struct cdrom_device_info *cdi, int lock);
+static int pcd_drive_reset(struct cdrom_device_info *cdi);
+static int pcd_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn);
+static int pcd_audio_ioctl(struct cdrom_device_info *cdi,
+ unsigned int cmd, void *arg);
+static int pcd_packet(struct cdrom_device_info *cdi,
+ struct packet_command *cgc);
+
+static int pcd_detect(void);
+static void pcd_probe_capabilities(void);
+static void do_pcd_read_drq(void);
+static void do_pcd_request(request_queue_t * q);
+static void do_pcd_read(void);
+
+struct pcd_unit {
+ struct pi_adapter pia; /* interface to paride layer */
+ struct pi_adapter *pi;
+ int drive; /* master/slave */
+ int last_sense; /* result of last request sense */
+ int changed; /* media change seen */
+ int present; /* does this unit exist ? */
+ char *name; /* pcd0, pcd1, etc */
+ struct cdrom_device_info info; /* uniform cdrom interface */
+ struct gendisk *disk;
+};
+
+static struct pcd_unit pcd[PCD_UNITS];
+
+static char pcd_scratch[64];
+static char pcd_buffer[2048]; /* raw block buffer */
+static int pcd_bufblk = -1; /* block in buffer, in CD units,
+ -1 for nothing there. See also
+ pd_unit.
+ */
+
+/* the variables below are used mainly in the I/O request engine, which
+ processes only one request at a time.
+*/
+
+static struct pcd_unit *pcd_current; /* current request's drive */
+static struct request *pcd_req;
+static int pcd_retries; /* retries on current request */
+static int pcd_busy; /* request being processed ? */
+static int pcd_sector; /* address of next requested sector */
+static int pcd_count; /* number of blocks still to do */
+static char *pcd_buf; /* buffer for request in progress */
+
+static int pcd_warned; /* Have we logged a phase warning ? */
+
+/* kernel glue structures */
+
+static int pcd_block_open(struct inode *inode, struct file *file)
+{
+ struct pcd_unit *cd = inode->i_bdev->bd_disk->private_data;
+ return cdrom_open(&cd->info, inode, file);
+}
+
+static int pcd_block_release(struct inode *inode, struct file *file)
+{
+ struct pcd_unit *cd = inode->i_bdev->bd_disk->private_data;
+ return cdrom_release(&cd->info, file);
+}
+
+static int pcd_block_ioctl(struct inode *inode, struct file *file,
+ unsigned cmd, unsigned long arg)
+{
+ struct pcd_unit *cd = inode->i_bdev->bd_disk->private_data;
+ return cdrom_ioctl(file, &cd->info, inode, cmd, arg);
+}
+
+static int pcd_block_media_changed(struct gendisk *disk)
+{
+ struct pcd_unit *cd = disk->private_data;
+ return cdrom_media_changed(&cd->info);
+}
+
+static struct block_device_operations pcd_bdops = {
+ .owner = THIS_MODULE,
+ .open = pcd_block_open,
+ .release = pcd_block_release,
+ .ioctl = pcd_block_ioctl,
+ .media_changed = pcd_block_media_changed,
+};
+
+static struct cdrom_device_ops pcd_dops = {
+ .open = pcd_open,
+ .release = pcd_release,
+ .drive_status = pcd_drive_status,
+ .media_changed = pcd_media_changed,
+ .tray_move = pcd_tray_move,
+ .lock_door = pcd_lock_door,
+ .get_mcn = pcd_get_mcn,
+ .reset = pcd_drive_reset,
+ .audio_ioctl = pcd_audio_ioctl,
+ .generic_packet = pcd_packet,
+ .capability = CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK |
+ CDC_MCN | CDC_MEDIA_CHANGED | CDC_RESET |
+ CDC_PLAY_AUDIO | CDC_GENERIC_PACKET | CDC_CD_R |
+ CDC_CD_RW,
+};
+
+static void pcd_init_units(void)
+{
+ struct pcd_unit *cd;
+ int unit;
+
+ pcd_drive_count = 0;
+ for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
+ struct gendisk *disk = alloc_disk(1);
+ if (!disk)
+ continue;
+ cd->disk = disk;
+ cd->pi = &cd->pia;
+ cd->present = 0;
+ cd->last_sense = 0;
+ cd->changed = 1;
+ cd->drive = (*drives[unit])[D_SLV];
+ if ((*drives[unit])[D_PRT])
+ pcd_drive_count++;
+
+ cd->name = &cd->info.name[0];
+ snprintf(cd->name, sizeof(cd->info.name), "%s%d", name, unit);
+ cd->info.ops = &pcd_dops;
+ cd->info.handle = cd;
+ cd->info.speed = 0;
+ cd->info.capacity = 1;
+ cd->info.mask = 0;
+ disk->major = major;
+ disk->first_minor = unit;
+ strcpy(disk->disk_name, cd->name); /* umm... */
+ disk->fops = &pcd_bdops;
+ }
+}
+
+static int pcd_open(struct cdrom_device_info *cdi, int purpose)
+{
+ struct pcd_unit *cd = cdi->handle;
+ if (!cd->present)
+ return -ENODEV;
+ return 0;
+}
+
+static void pcd_release(struct cdrom_device_info *cdi)
+{
+}
+
+static inline int status_reg(struct pcd_unit *cd)
+{
+ return pi_read_regr(cd->pi, 1, 6);
+}
+
+static inline int read_reg(struct pcd_unit *cd, int reg)
+{
+ return pi_read_regr(cd->pi, 0, reg);
+}
+
+static inline void write_reg(struct pcd_unit *cd, int reg, int val)
+{
+ pi_write_regr(cd->pi, 0, reg, val);
+}
+
+static int pcd_wait(struct pcd_unit *cd, int go, int stop, char *fun, char *msg)
+{
+ int j, r, e, s, p;
+
+ j = 0;
+ while ((((r = status_reg(cd)) & go) || (stop && (!(r & stop))))
+ && (j++ < PCD_SPIN))
+ udelay(PCD_DELAY);
+
+ if ((r & (IDE_ERR & stop)) || (j >= PCD_SPIN)) {
+ s = read_reg(cd, 7);
+ e = read_reg(cd, 1);
+ p = read_reg(cd, 2);
+ if (j >= PCD_SPIN)
+ e |= 0x100;
+ if (fun)
+ printk("%s: %s %s: alt=0x%x stat=0x%x err=0x%x"
+ " loop=%d phase=%d\n",
+ cd->name, fun, msg, r, s, e, j, p);
+ return (s << 8) + r;
+ }
+ return 0;
+}
+
+static int pcd_command(struct pcd_unit *cd, char *cmd, int dlen, char *fun)
+{
+ pi_connect(cd->pi);
+
+ write_reg(cd, 6, 0xa0 + 0x10 * cd->drive);
+
+ if (pcd_wait(cd, IDE_BUSY | IDE_DRQ, 0, fun, "before command")) {
+ pi_disconnect(cd->pi);
+ return -1;
+ }
+
+ write_reg(cd, 4, dlen % 256);
+ write_reg(cd, 5, dlen / 256);
+ write_reg(cd, 7, 0xa0); /* ATAPI packet command */
+
+ if (pcd_wait(cd, IDE_BUSY, IDE_DRQ, fun, "command DRQ")) {
+ pi_disconnect(cd->pi);
+ return -1;
+ }
+
+ if (read_reg(cd, 2) != 1) {
+ printk("%s: %s: command phase error\n", cd->name, fun);
+ pi_disconnect(cd->pi);
+ return -1;
+ }
+
+ pi_write_block(cd->pi, cmd, 12);
+
+ return 0;
+}
+
+static int pcd_completion(struct pcd_unit *cd, char *buf, char *fun)
+{
+ int r, d, p, n, k, j;
+
+ r = -1;
+ k = 0;
+ j = 0;
+
+ if (!pcd_wait(cd, IDE_BUSY, IDE_DRQ | IDE_READY | IDE_ERR,
+ fun, "completion")) {
+ r = 0;
+ while (read_reg(cd, 7) & IDE_DRQ) {
+ d = read_reg(cd, 4) + 256 * read_reg(cd, 5);
+ n = (d + 3) & 0xfffc;
+ p = read_reg(cd, 2) & 3;
+
+ if ((p == 2) && (n > 0) && (j == 0)) {
+ pi_read_block(cd->pi, buf, n);
+ if (verbose > 1)
+ printk("%s: %s: Read %d bytes\n",
+ cd->name, fun, n);
+ r = 0;
+ j++;
+ } else {
+ if (verbose > 1)
+ printk
+ ("%s: %s: Unexpected phase %d, d=%d, k=%d\n",
+ cd->name, fun, p, d, k);
+ if ((verbose < 2) && !pcd_warned) {
+ pcd_warned = 1;
+ printk
+ ("%s: WARNING: ATAPI phase errors\n",
+ cd->name);
+ }
+ mdelay(1);
+ }
+ if (k++ > PCD_TMO) {
+ printk("%s: Stuck DRQ\n", cd->name);
+ break;
+ }
+ if (pcd_wait
+ (cd, IDE_BUSY, IDE_DRQ | IDE_READY | IDE_ERR, fun,
+ "completion")) {
+ r = -1;
+ break;
+ }
+ }
+ }
+
+ pi_disconnect(cd->pi);
+
+ return r;
+}
+
+static void pcd_req_sense(struct pcd_unit *cd, char *fun)
+{
+ char rs_cmd[12] = { 0x03, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0 };
+ char buf[16];
+ int r, c;
+
+ r = pcd_command(cd, rs_cmd, 16, "Request sense");
+ mdelay(1);
+ if (!r)
+ pcd_completion(cd, buf, "Request sense");
+
+ cd->last_sense = -1;
+ c = 2;
+ if (!r) {
+ if (fun)
+ printk("%s: %s: Sense key: %x, ASC: %x, ASQ: %x\n",
+ cd->name, fun, buf[2] & 0xf, buf[12], buf[13]);
+ c = buf[2] & 0xf;
+ cd->last_sense =
+ c | ((buf[12] & 0xff) << 8) | ((buf[13] & 0xff) << 16);
+ }
+ if ((c == 2) || (c == 6))
+ cd->changed = 1;
+}
+
+static int pcd_atapi(struct pcd_unit *cd, char *cmd, int dlen, char *buf, char *fun)
+{
+ int r;
+
+ r = pcd_command(cd, cmd, dlen, fun);
+ mdelay(1);
+ if (!r)
+ r = pcd_completion(cd, buf, fun);
+ if (r)
+ pcd_req_sense(cd, fun);
+
+ return r;
+}
+
+static int pcd_packet(struct cdrom_device_info *cdi, struct packet_command *cgc)
+{
+ return pcd_atapi(cdi->handle, cgc->cmd, cgc->buflen, cgc->buffer,
+ "generic packet");
+}
+
+#define DBMSG(msg) ((verbose>1)?(msg):NULL)
+
+static int pcd_media_changed(struct cdrom_device_info *cdi, int slot_nr)
+{
+ struct pcd_unit *cd = cdi->handle;
+ int res = cd->changed;
+ if (res)
+ cd->changed = 0;
+ return res;
+}
+
+static int pcd_lock_door(struct cdrom_device_info *cdi, int lock)
+{
+ char un_cmd[12] = { 0x1e, 0, 0, 0, lock, 0, 0, 0, 0, 0, 0, 0 };
+
+ return pcd_atapi(cdi->handle, un_cmd, 0, pcd_scratch,
+ lock ? "lock door" : "unlock door");
+}
+
+static int pcd_tray_move(struct cdrom_device_info *cdi, int position)
+{
+ char ej_cmd[12] = { 0x1b, 0, 0, 0, 3 - position, 0, 0, 0, 0, 0, 0, 0 };
+
+ return pcd_atapi(cdi->handle, ej_cmd, 0, pcd_scratch,
+ position ? "eject" : "close tray");
+}
+
+static void pcd_sleep(int cs)
+{
+ current->state = TASK_INTERRUPTIBLE;
+ schedule_timeout(cs);
+}
+
+static int pcd_reset(struct pcd_unit *cd)
+{
+ int i, k, flg;
+ int expect[5] = { 1, 1, 1, 0x14, 0xeb };
+
+ pi_connect(cd->pi);
+ write_reg(cd, 6, 0xa0 + 0x10 * cd->drive);
+ write_reg(cd, 7, 8);
+
+ pcd_sleep(20 * HZ / 1000); /* delay a bit */
+
+ k = 0;
+ while ((k++ < PCD_RESET_TMO) && (status_reg(cd) & IDE_BUSY))
+ pcd_sleep(HZ / 10);
+
+ flg = 1;
+ for (i = 0; i < 5; i++)
+ flg &= (read_reg(cd, i + 1) == expect[i]);
+
+ if (verbose) {
+ printk("%s: Reset (%d) signature = ", cd->name, k);
+ for (i = 0; i < 5; i++)
+ printk("%3x", read_reg(cd, i + 1));
+ if (!flg)
+ printk(" (incorrect)");
+ printk("\n");
+ }
+
+ pi_disconnect(cd->pi);
+ return flg - 1;
+}
+
+static int pcd_drive_reset(struct cdrom_device_info *cdi)
+{
+ return pcd_reset(cdi->handle);
+}
+
+static int pcd_ready_wait(struct pcd_unit *cd, int tmo)
+{
+ char tr_cmd[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+ int k, p;
+
+ k = 0;
+ while (k < tmo) {
+ cd->last_sense = 0;
+ pcd_atapi(cd, tr_cmd, 0, NULL, DBMSG("test unit ready"));
+ p = cd->last_sense;
+ if (!p)
+ return 0;
+ if (!(((p & 0xffff) == 0x0402) || ((p & 0xff) == 6)))
+ return p;
+ k++;
+ pcd_sleep(HZ);
+ }
+ return 0x000020; /* timeout */
+}
+
+static int pcd_drive_status(struct cdrom_device_info *cdi, int slot_nr)
+{
+ char rc_cmd[12] = { 0x25, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+ struct pcd_unit *cd = cdi->handle;
+
+ if (pcd_ready_wait(cd, PCD_READY_TMO))
+ return CDS_DRIVE_NOT_READY;
+ if (pcd_atapi(cd, rc_cmd, 8, pcd_scratch, DBMSG("check media")))
+ return CDS_NO_DISC;
+ return CDS_DISC_OK;
+}
+
+static int pcd_identify(struct pcd_unit *cd, char *id)
+{
+ int k, s;
+ char id_cmd[12] = { 0x12, 0, 0, 0, 36, 0, 0, 0, 0, 0, 0, 0 };
+
+ pcd_bufblk = -1;
+
+ s = pcd_atapi(cd, id_cmd, 36, pcd_buffer, "identify");
+
+ if (s)
+ return -1;
+ if ((pcd_buffer[0] & 0x1f) != 5) {
+ if (verbose)
+ printk("%s: %s is not a CD-ROM\n",
+ cd->name, cd->drive ? "Slave" : "Master");
+ return -1;
+ }
+ memcpy(id, pcd_buffer + 16, 16);
+ id[16] = 0;
+ k = 16;
+ while ((k >= 0) && (id[k] <= 0x20)) {
+ id[k] = 0;
+ k--;
+ }
+
+ printk("%s: %s: %s\n", cd->name, cd->drive ? "Slave" : "Master", id);
+
+ return 0;
+}
+
+/*
+ * returns 0, with id set if drive is detected
+ * -1, if drive detection failed
+ */
+static int pcd_probe(struct pcd_unit *cd, int ms, char *id)
+{
+ if (ms == -1) {
+ for (cd->drive = 0; cd->drive <= 1; cd->drive++)
+ if (!pcd_reset(cd) && !pcd_identify(cd, id))
+ return 0;
+ } else {
+ cd->drive = ms;
+ if (!pcd_reset(cd) && !pcd_identify(cd, id))
+ return 0;
+ }
+ return -1;
+}
+
+static void pcd_probe_capabilities(void)
+{
+ int unit, r;
+ char buffer[32];
+ char cmd[12] = { 0x5a, 1 << 3, 0x2a, 0, 0, 0, 0, 18, 0, 0, 0, 0 };
+ struct pcd_unit *cd;
+
+ for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
+ if (!cd->present)
+ continue;
+ r = pcd_atapi(cd, cmd, 18, buffer, "mode sense capabilities");
+ if (r)
+ continue;
+ /* we should now have the cap page */
+ if ((buffer[11] & 1) == 0)
+ cd->info.mask |= CDC_CD_R;
+ if ((buffer[11] & 2) == 0)
+ cd->info.mask |= CDC_CD_RW;
+ if ((buffer[12] & 1) == 0)
+ cd->info.mask |= CDC_PLAY_AUDIO;
+ if ((buffer[14] & 1) == 0)
+ cd->info.mask |= CDC_LOCK;
+ if ((buffer[14] & 8) == 0)
+ cd->info.mask |= CDC_OPEN_TRAY;
+ if ((buffer[14] >> 6) == 0)
+ cd->info.mask |= CDC_CLOSE_TRAY;
+ }
+}
+
+static int pcd_detect(void)
+{
+ char id[18];
+ int k, unit;
+ struct pcd_unit *cd;
+
+ printk("%s: %s version %s, major %d, nice %d\n",
+ name, name, PCD_VERSION, major, nice);
+
+ k = 0;
+ if (pcd_drive_count == 0) { /* nothing spec'd - so autoprobe for 1 */
+ cd = pcd;
+ if (pi_init(cd->pi, 1, -1, -1, -1, -1, -1, pcd_buffer,
+ PI_PCD, verbose, cd->name)) {
+ if (!pcd_probe(cd, -1, id) && cd->disk) {
+ cd->present = 1;
+ k++;
+ } else
+ pi_release(cd->pi);
+ }
+ } else {
+ for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
+ int *conf = *drives[unit];
+ if (!conf[D_PRT])
+ continue;
+ if (!pi_init(cd->pi, 0, conf[D_PRT], conf[D_MOD],
+ conf[D_UNI], conf[D_PRO], conf[D_DLY],
+ pcd_buffer, PI_PCD, verbose, cd->name))
+ continue;
+ if (!pcd_probe(cd, conf[D_SLV], id) && cd->disk) {
+ cd->present = 1;
+ k++;
+ } else
+ pi_release(cd->pi);
+ }
+ }
+ if (k)
+ return 0;
+
+ printk("%s: No CD-ROM drive found\n", name);
+ for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++)
+ put_disk(cd->disk);
+ return -1;
+}
+
+/* I/O request processing */
+static struct request_queue *pcd_queue;
+
+static void do_pcd_request(request_queue_t * q)
+{
+ if (pcd_busy)
+ return;
+ while (1) {
+ pcd_req = elv_next_request(q);
+ if (!pcd_req)
+ return;
+
+ if (rq_data_dir(pcd_req) == READ) {
+ struct pcd_unit *cd = pcd_req->rq_disk->private_data;
+ if (cd != pcd_current)
+ pcd_bufblk = -1;
+ pcd_current = cd;
+ pcd_sector = pcd_req->sector;
+ pcd_count = pcd_req->current_nr_sectors;
+ pcd_buf = pcd_req->buffer;
+ pcd_busy = 1;
+ ps_set_intr(do_pcd_read, NULL, 0, nice);
+ return;
+ } else
+ end_request(pcd_req, 0);
+ }
+}
+
+static inline void next_request(int success)
+{
+ unsigned long saved_flags;
+
+ spin_lock_irqsave(&pcd_lock, saved_flags);
+ end_request(pcd_req, success);
+ pcd_busy = 0;
+ do_pcd_request(pcd_queue);
+ spin_unlock_irqrestore(&pcd_lock, saved_flags);
+}
+
+static int pcd_ready(void)
+{
+ return (((status_reg(pcd_current) & (IDE_BUSY | IDE_DRQ)) == IDE_DRQ));
+}
+
+static void pcd_transfer(void)
+{
+
+ while (pcd_count && (pcd_sector / 4 == pcd_bufblk)) {
+ int o = (pcd_sector % 4) * 512;
+ memcpy(pcd_buf, pcd_buffer + o, 512);
+ pcd_count--;
+ pcd_buf += 512;
+ pcd_sector++;
+ }
+}
+
+static void pcd_start(void)
+{
+ int b, i;
+ char rd_cmd[12] = { 0xa8, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 };
+
+ pcd_bufblk = pcd_sector / 4;
+ b = pcd_bufblk;
+ for (i = 0; i < 4; i++) {
+ rd_cmd[5 - i] = b & 0xff;
+ b = b >> 8;
+ }
+
+ if (pcd_command(pcd_current, rd_cmd, 2048, "read block")) {
+ pcd_bufblk = -1;
+ next_request(0);
+ return;
+ }
+
+ mdelay(1);
+
+ ps_set_intr(do_pcd_read_drq, pcd_ready, PCD_TMO, nice);
+}
+
+static void do_pcd_read(void)
+{
+ pcd_busy = 1;
+ pcd_retries = 0;
+ pcd_transfer();
+ if (!pcd_count) {
+ next_request(1);
+ return;
+ }
+
+ pi_do_claimed(pcd_current->pi, pcd_start);
+}
+
+static void do_pcd_read_drq(void)
+{
+ unsigned long saved_flags;
+
+ if (pcd_completion(pcd_current, pcd_buffer, "read block")) {
+ if (pcd_retries < PCD_RETRIES) {
+ mdelay(1);
+ pcd_retries++;
+ pi_do_claimed(pcd_current->pi, pcd_start);
+ return;
+ }
+ pcd_bufblk = -1;
+ next_request(0);
+ return;
+ }
+
+ do_pcd_read();
+ spin_lock_irqsave(&pcd_lock, saved_flags);
+ do_pcd_request(pcd_queue);
+ spin_unlock_irqrestore(&pcd_lock, saved_flags);
+}
+
+/* the audio_ioctl stuff is adapted from sr_ioctl.c */
+
+static int pcd_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
+{
+ struct pcd_unit *cd = cdi->handle;
+
+ switch (cmd) {
+
+ case CDROMREADTOCHDR:
+
+ {
+ char cmd[12] =
+ { GPCMD_READ_TOC_PMA_ATIP, 0, 0, 0, 0, 0, 0, 0, 12,
+ 0, 0, 0 };
+ struct cdrom_tochdr *tochdr =
+ (struct cdrom_tochdr *) arg;
+ char buffer[32];
+ int r;
+
+ r = pcd_atapi(cd, cmd, 12, buffer, "read toc header");
+
+ tochdr->cdth_trk0 = buffer[2];
+ tochdr->cdth_trk1 = buffer[3];
+
+ return r ? -EIO : 0;
+ }
+
+ case CDROMREADTOCENTRY:
+
+ {
+ char cmd[12] =
+ { GPCMD_READ_TOC_PMA_ATIP, 0, 0, 0, 0, 0, 0, 0, 12,
+ 0, 0, 0 };
+
+ struct cdrom_tocentry *tocentry =
+ (struct cdrom_tocentry *) arg;
+ unsigned char buffer[32];
+ int r;
+
+ cmd[1] =
+ (tocentry->cdte_format == CDROM_MSF ? 0x02 : 0);
+ cmd[6] = tocentry->cdte_track;
+
+ r = pcd_atapi(cd, cmd, 12, buffer, "read toc entry");
+
+ tocentry->cdte_ctrl = buffer[5] & 0xf;
+ tocentry->cdte_adr = buffer[5] >> 4;
+ tocentry->cdte_datamode =
+ (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
+ if (tocentry->cdte_format == CDROM_MSF) {
+ tocentry->cdte_addr.msf.minute = buffer[9];
+ tocentry->cdte_addr.msf.second = buffer[10];
+ tocentry->cdte_addr.msf.frame = buffer[11];
+ } else
+ tocentry->cdte_addr.lba =
+ (((((buffer[8] << 8) + buffer[9]) << 8)
+ + buffer[10]) << 8) + buffer[11];
+
+ return r ? -EIO : 0;
+ }
+
+ default:
+
+ return -ENOSYS;
+ }
+}
+
+static int pcd_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
+{
+ char cmd[12] =
+ { GPCMD_READ_SUBCHANNEL, 0, 0x40, 2, 0, 0, 0, 0, 24, 0, 0, 0 };
+ char buffer[32];
+
+ if (pcd_atapi(cdi->handle, cmd, 24, buffer, "get mcn"))
+ return -EIO;
+
+ memcpy(mcn->medium_catalog_number, buffer + 9, 13);
+ mcn->medium_catalog_number[13] = 0;
+
+ return 0;
+}
+
+static int __init pcd_init(void)
+{
+ struct pcd_unit *cd;
+ int unit;
+
+ if (disable)
+ return -1;
+
+ pcd_init_units();
+
+ if (pcd_detect())
+ return -1;
+
+ /* get the atapi capabilities page */
+ pcd_probe_capabilities();
+
+ if (register_blkdev(major, name)) {
+ for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++)
+ put_disk(cd->disk);
+ return -1;
+ }
+
+ pcd_queue = blk_init_queue(do_pcd_request, &pcd_lock);
+ if (!pcd_queue) {
+ unregister_blkdev(major, name);
+ for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++)
+ put_disk(cd->disk);
+ return -1;
+ }
+
+ for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
+ if (cd->present) {
+ register_cdrom(&cd->info);
+ cd->disk->private_data = cd;
+ cd->disk->queue = pcd_queue;
+ add_disk(cd->disk);
+ }
+ }
+
+ return 0;
+}
+
+static void __exit pcd_exit(void)
+{
+ struct pcd_unit *cd;
+ int unit;
+
+ for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
+ if (cd->present) {
+ del_gendisk(cd->disk);
+ pi_release(cd->pi);
+ unregister_cdrom(&cd->info);
+ }
+ put_disk(cd->disk);
+ }
+ blk_cleanup_queue(pcd_queue);
+ unregister_blkdev(major, name);
+}
+
+MODULE_LICENSE("GPL");
+module_init(pcd_init)
+module_exit(pcd_exit)
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-26 12:53:18 +0000