pcd.c
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- /*
- 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;
- #define D_PRT 0
- #define D_PRO 1
- #define D_UNI 2
- #define D_MOD 3
- #define D_SLV 4
- #define D_DLY 5
- #define DU (*drives[unit])
- /* end of parameters */
- #include <linux/module.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 <asm/uaccess.h>
- #ifndef MODULE
- #include "setup.h"
- static STT pcd_stt[6] = {{"drive0",6,drive0},
- {"drive1",6,drive1},
- {"drive2",6,drive2},
- {"drive3",6,drive3},
- {"disable",1,&disable},
- {"nice",1,&nice}};
- void pcd_setup( char *str, int *ints)
- { generic_setup(pcd_stt,6,str);
- }
- #endif
- MODULE_PARM(verbose,"i");
- MODULE_PARM(major,"i");
- MODULE_PARM(name,"s");
- MODULE_PARM(nice,"i");
- MODULE_PARM(drive0,"1-6i");
- MODULE_PARM(drive1,"1-6i");
- MODULE_PARM(drive2,"1-6i");
- MODULE_PARM(drive3,"1-6i");
- #include "paride.h"
- /* set up defines for blk.h, why don't all drivers do it this way ? */
- #define MAJOR_NR major
- #define DEVICE_NAME "PCD"
- #define DEVICE_REQUEST do_pcd_request
- #define DEVICE_NR(device) (MINOR(device))
- #define DEVICE_ON(device)
- #define DEVICE_OFF(device)
- #include <linux/blk.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
- int pcd_init(void);
- void cleanup_module( void );
- 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 cdrom_generic_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);
- static int pcd_blocksizes[PCD_UNITS];
- 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 pcd_unit pcd[PCD_UNITS];
- /* 'unit' must be defined in all functions - either as a local or a param */
- #define PCD pcd[unit]
- #define PI PCD.pi
- 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 int pcd_unit = -1; /* unit of current request & bufblk */
- static int pcd_retries; /* retries on current request */
- static int pcd_busy = 0; /* 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 = 0; /* Have we logged a phase warning ? */
- /* kernel glue structures */
- static struct block_device_operations pcd_bdops = {
- owner: THIS_MODULE,
- open: cdrom_open,
- release: cdrom_release,
- ioctl: cdrom_ioctl,
- check_media_change: cdrom_media_changed,
- };
- static struct cdrom_device_ops pcd_dops = {
- pcd_open,
- pcd_release,
- pcd_drive_status,
- pcd_media_changed,
- pcd_tray_move,
- pcd_lock_door,
- 0, /* select speed */
- 0, /* select disk */
- 0, /* get last session */
- pcd_get_mcn,
- pcd_drive_reset,
- pcd_audio_ioctl,
- 0, /* dev_ioctl */
- 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,
- 0,
- pcd_packet,
- };
- static void pcd_init_units( void )
- { int unit, j;
- pcd_drive_count = 0;
- for (unit=0;unit<PCD_UNITS;unit++) {
- PCD.pi = & PCD.pia;
- PCD.present = 0;
- PCD.last_sense = 0;
- PCD.changed = 1;
- PCD.drive = DU[D_SLV];
- if (DU[D_PRT]) pcd_drive_count++;
-
- j = 0;
- while ((j < (sizeof(PCD.info.name)-2)) &&
- (PCD.info.name[j]=name[j])) j++;
- PCD.info.name[j++] = '0' + unit;
- PCD.info.name[j] = 0;
- PCD.name = &PCD.info.name[0];
- PCD.info.ops = &pcd_dops;
- PCD.info.handle = NULL;
- PCD.info.dev = MKDEV(major,unit);
- PCD.info.speed = 0;
- PCD.info.capacity = 1;
- PCD.info.mask = 0;
- }
- }
- int pcd_init (void) /* preliminary initialisation */
- { int i, 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_NR,name,&pcd_bdops)) {
- printk("pcd: unable to get major number %dn",MAJOR_NR);
- return -1;
- }
- for (unit=0;unit<PCD_UNITS;unit++) {
- if (PCD.present) {
- register_cdrom(&PCD.info);
- devfs_plain_cdrom(&PCD.info, &pcd_bdops);
- }
- }
- blk_init_queue(BLK_DEFAULT_QUEUE(MAJOR_NR), DEVICE_REQUEST);
- read_ahead[MAJOR_NR] = 8; /* 8 sector (4kB) read ahead */
- for (i=0;i<PCD_UNITS;i++) pcd_blocksizes[i] = 1024;
- blksize_size[MAJOR_NR] = pcd_blocksizes;
- return 0;
- }
- static int pcd_open(struct cdrom_device_info *cdi, int purpose)
- { int unit = DEVICE_NR(cdi->dev);
- if ((unit >= PCD_UNITS) || (!PCD.present)) return -ENODEV;
- return 0;
- }
- static void pcd_release(struct cdrom_device_info *cdi)
- {
- }
- #ifdef MODULE
- /* Glue for modules ... */
- int init_module(void)
- { int err;
- #ifdef PARIDE_JUMBO
- { extern paride_init();
- paride_init();
- }
- #endif
- err = pcd_init();
- return err;
- }
- void cleanup_module(void)
- { int unit;
-
- for (unit=0;unit<PCD_UNITS;unit++)
- if (PCD.present) {
- pi_release(PI);
- unregister_cdrom(&PCD.info);
- }
- unregister_blkdev(MAJOR_NR,name);
- }
- #endif
- #define WR(c,r,v) pi_write_regr(PI,c,r,v)
- #define RR(c,r) (pi_read_regr(PI,c,r))
- static int pcd_wait( int unit, int go, int stop, char * fun, char * msg )
- { int j, r, e, s, p;
- j = 0;
- while ((((r=RR(1,6))&go)||(stop&&(!(r&stop))))&&(j++<PCD_SPIN))
- udelay(PCD_DELAY);
- if ((r&(IDE_ERR&stop))||(j>=PCD_SPIN)) {
- s = RR(0,7);
- e = RR(0,1);
- p = RR(0,2);
- if (j >= PCD_SPIN) e |= 0x100;
- if (fun) printk("%s: %s %s: alt=0x%x stat=0x%x err=0x%x"
- " loop=%d phase=%dn",
- PCD.name,fun,msg,r,s,e,j,p);
- return (s<<8)+r;
- }
- return 0;
- }
- static int pcd_command( int unit, char * cmd, int dlen, char * fun )
- { pi_connect(PI);
- WR(0,6,0xa0 + 0x10*PCD.drive);
- if (pcd_wait(unit,IDE_BUSY|IDE_DRQ,0,fun,"before command")) {
- pi_disconnect(PI);
- return -1;
- }
- WR(0,4,dlen % 256);
- WR(0,5,dlen / 256);
- WR(0,7,0xa0); /* ATAPI packet command */
- if (pcd_wait(unit,IDE_BUSY,IDE_DRQ,fun,"command DRQ")) {
- pi_disconnect(PI);
- return -1;
- }
- if (RR(0,2) != 1) {
- printk("%s: %s: command phase errorn",PCD.name,fun);
- pi_disconnect(PI);
- return -1;
- }
- pi_write_block(PI,cmd,12);
- return 0;
- }
- static int pcd_completion( int unit, char * buf, char * fun )
- { int r, d, p, n, k, j;
- r = -1; k = 0; j = 0;
- if (!pcd_wait(unit,IDE_BUSY,IDE_DRQ|IDE_READY|IDE_ERR,
- fun,"completion")) {
- r = 0;
- while (RR(0,7)&IDE_DRQ) {
- d = (RR(0,4)+256*RR(0,5));
- n = ((d+3)&0xfffc);
- p = RR(0,2)&3;
- if ((p == 2) && (n > 0) && (j == 0)) {
- pi_read_block(PI,buf,n);
- if (verbose > 1)
- printk("%s: %s: Read %d bytesn",PCD.name,fun,n);
- r = 0; j++;
- } else {
- if (verbose > 1)
- printk("%s: %s: Unexpected phase %d, d=%d, k=%dn",
- PCD.name,fun,p,d,k);
- if ((verbose < 2) && !pcd_warned) {
- pcd_warned = 1;
- printk("%s: WARNING: ATAPI phase errorsn",PCD.name);
- }
- mdelay(1);
- }
- if (k++ > PCD_TMO) {
- printk("%s: Stuck DRQn",PCD.name);
- break;
- }
- if (pcd_wait(unit,IDE_BUSY,IDE_DRQ|IDE_READY|IDE_ERR,
- fun,"completion")) {
- r = -1;
- break;
- }
- }
- }
-
- pi_disconnect(PI);
- return r;
- }
- static void pcd_req_sense( int unit, 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(unit,rs_cmd,16,"Request sense");
- mdelay(1);
- if (!r) pcd_completion(unit,buf,"Request sense");
- PCD.last_sense = -1; c = 2;
- if (!r) {
- if (fun) printk("%s: %s: Sense key: %x, ASC: %x, ASQ: %xn",
- PCD.name,fun,buf[2]&0xf,buf[12],buf[13]);
- c = buf[2]&0xf;
- PCD.last_sense = c | ((buf[12]&0xff)<<8) | ((buf[13]&0xff)<<16);
- }
- if ((c == 2) || (c == 6)) PCD.changed = 1;
- }
- static int pcd_atapi( int unit, char * cmd, int dlen, char * buf, char * fun )
- { int r;
- r = pcd_command(unit,cmd,dlen,fun);
- mdelay(1);
- if (!r) r = pcd_completion(unit,buf,fun);
- if (r) pcd_req_sense(unit,fun);
-
- return r;
- }
- static int pcd_packet(struct cdrom_device_info *cdi,
- struct cdrom_generic_command *cgc)
- {
- char *un_cmd;
- int unit = DEVICE_NR(cdi->dev);
- un_cmd = cgc->cmd;
- return pcd_atapi(unit,un_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)
- { int r;
- int unit = DEVICE_NR(cdi->dev);
- r = PCD.changed;
- PCD.changed = 0;
- return r;
- }
- 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 };
- int unit = DEVICE_NR(cdi->dev);
- return pcd_atapi(unit,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 };
- int unit = DEVICE_NR(cdi->dev);
- return pcd_atapi(unit,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( int unit )
- { int i, k, flg;
- int expect[5] = {1,1,1,0x14,0xeb};
- pi_connect(PI);
- WR(0,6,0xa0 + 0x10*PCD.drive);
- WR(0,7,8);
- pcd_sleep(20*HZ/1000); /* delay a bit */
- k = 0;
- while ((k++ < PCD_RESET_TMO) && (RR(1,6)&IDE_BUSY))
- pcd_sleep(HZ/10);
- flg = 1;
- for(i=0;i<5;i++) flg &= (RR(0,i+1) == expect[i]);
- if (verbose) {
- printk("%s: Reset (%d) signature = ",PCD.name,k);
- for (i=0;i<5;i++) printk("%3x",RR(0,i+1));
- if (!flg) printk(" (incorrect)");
- printk("n");
- }
-
- pi_disconnect(PI);
- return flg-1;
- }
- static int pcd_drive_reset(struct cdrom_device_info *cdi)
- { return pcd_reset(DEVICE_NR(cdi->dev));
- }
- static int pcd_ready_wait( int unit, 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) {
- PCD.last_sense = 0;
- pcd_atapi(unit,tr_cmd,0,NULL,DBMSG("test unit ready"));
- p = PCD.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};
- int unit = DEVICE_NR(cdi->dev);
- if (pcd_ready_wait(unit,PCD_READY_TMO))
- return CDS_DRIVE_NOT_READY;
- if (pcd_atapi(unit,rc_cmd,8,pcd_scratch,DBMSG("check media")))
- return CDS_NO_DISC;
- return CDS_DISC_OK;
- }
- static int pcd_identify( int unit, 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(unit,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-ROMn",
- PCD.name,PCD.drive?"Slave":"Master");
- return -1;
- }
- for (k=0;k<16;k++) id[k] = pcd_buffer[16+k]; id[16] = 0;
- k = 16; while ((k >= 0) && (id[k] <= 0x20)) { id[k] = 0; k--; }
- printk("%s: %s: %sn",PCD.name,PCD.drive?"Slave":"Master",id);
- return 0;
- }
- static int pcd_probe( int unit, int ms, char * id )
- /* returns 0, with id set if drive is detected
- -1, if drive detection failed
- */
- { if (ms == -1) {
- for (PCD.drive=0;PCD.drive<=1;PCD.drive++)
- if (!pcd_reset(unit) && !pcd_identify(unit,id))
- return 0;
- } else {
- PCD.drive = ms;
- if (!pcd_reset(unit) && !pcd_identify(unit,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};
- for (unit=0;unit<PCD_UNITS;unit++) {
- if (!PCD.present) continue;
- r = pcd_atapi(unit,cmd,18, buffer,"mode sense capabilities");
- if (r) continue;
- /* we should now have the cap page */
- if ((buffer[11] & 1) == 0)
- PCD.info.mask |= CDC_CD_R;
- if ((buffer[11] & 2) == 0)
- PCD.info.mask |= CDC_CD_RW;
- if ((buffer[12] & 1) == 0)
- PCD.info.mask |= CDC_PLAY_AUDIO;
- if ((buffer[14] & 1) == 0)
- PCD.info.mask |= CDC_LOCK;
- if ((buffer[14] & 8) == 0)
- PCD.info.mask |= CDC_OPEN_TRAY;
- if ((buffer[14] >> 6) == 0)
- PCD.info.mask |= CDC_CLOSE_TRAY;
- }
- }
- static int pcd_detect( void )
- { char id[18];
- int k, unit;
- printk("%s: %s version %s, major %d, nice %dn",
- name,name,PCD_VERSION,major,nice);
- k = 0;
- if (pcd_drive_count == 0) { /* nothing spec'd - so autoprobe for 1 */
- unit = 0;
- if (pi_init(PI,1,-1,-1,-1,-1,-1,pcd_buffer,
- PI_PCD,verbose,PCD.name)) {
- if (!pcd_probe(unit,-1,id)) {
- PCD.present = 1;
- k++;
- } else pi_release(PI);
- }
- } else for (unit=0;unit<PCD_UNITS;unit++) if (DU[D_PRT])
- if (pi_init(PI,0,DU[D_PRT],DU[D_MOD],DU[D_UNI],
- DU[D_PRO],DU[D_DLY],pcd_buffer,PI_PCD,verbose,
- PCD.name)) {
- if (!pcd_probe(unit,DU[D_SLV],id)) {
- PCD.present = 1;
- k++;
- } else pi_release(PI);
- }
- if (k) return 0;
-
- printk("%s: No CD-ROM drive foundn",name);
- return -1;
- }
- /* I/O request processing */
- static void do_pcd_request (request_queue_t * q)
- { int unit;
- if (pcd_busy) return;
- while (1) {
- if (QUEUE_EMPTY || (CURRENT->rq_status == RQ_INACTIVE)) return;
- INIT_REQUEST;
- if (CURRENT->cmd == READ) {
- unit = MINOR(CURRENT->rq_dev);
- if (unit != pcd_unit) {
- pcd_bufblk = -1;
- pcd_unit = unit;
- }
- pcd_sector = CURRENT->sector;
- pcd_count = CURRENT->current_nr_sectors;
- pcd_buf = CURRENT->buffer;
- pcd_busy = 1;
- ps_set_intr(do_pcd_read,0,0,nice);
- return;
- }
- else end_request(0);
- }
- }
- static int pcd_ready( void )
- { int unit = pcd_unit;
- return (((RR(1,6)&(IDE_BUSY|IDE_DRQ))==IDE_DRQ)) ;
- }
- static void pcd_transfer( void )
- { int k, o;
- while (pcd_count && (pcd_sector/4 == pcd_bufblk)) {
- o = (pcd_sector % 4) * 512;
- for(k=0;k<512;k++) pcd_buf[k] = pcd_buffer[o+k];
- pcd_count--;
- pcd_buf += 512;
- pcd_sector++;
- }
- }
- static void pcd_start( void )
- { int unit = pcd_unit;
- int b, i;
- char rd_cmd[12] = {0xa8,0,0,0,0,0,0,0,0,1,0,0};
- long saved_flags;
- 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(unit,rd_cmd,2048,"read block")) {
- pcd_bufblk = -1;
- spin_lock_irqsave(&io_request_lock,saved_flags);
- pcd_busy = 0;
- end_request(0);
- do_pcd_request(NULL);
- spin_unlock_irqrestore(&io_request_lock,saved_flags);
- return;
- }
- mdelay(1);
- ps_set_intr(do_pcd_read_drq,pcd_ready,PCD_TMO,nice);
- }
- static void do_pcd_read( void )
- { int unit = pcd_unit;
- long saved_flags;
- pcd_busy = 1;
- pcd_retries = 0;
- pcd_transfer();
- if (!pcd_count) {
- spin_lock_irqsave(&io_request_lock,saved_flags);
- end_request(1);
- pcd_busy = 0;
- do_pcd_request(NULL);
- spin_unlock_irqrestore(&io_request_lock,saved_flags);
- return;
- }
- pi_do_claimed(PI,pcd_start);
- }
- static void do_pcd_read_drq( void )
- { int unit = pcd_unit;
- long saved_flags;
- if (pcd_completion(unit,pcd_buffer,"read block")) {
- if (pcd_retries < PCD_RETRIES) {
- mdelay(1);
- pcd_retries++;
- pi_do_claimed(PI,pcd_start);
- return;
- }
- spin_lock_irqsave(&io_request_lock,saved_flags);
- pcd_busy = 0;
- pcd_bufblk = -1;
- end_request(0);
- do_pcd_request(NULL);
- spin_unlock_irqrestore(&io_request_lock,saved_flags);
- return;
- }
- do_pcd_read();
- spin_lock_irqsave(&io_request_lock,saved_flags);
- do_pcd_request(NULL);
- spin_unlock_irqrestore(&io_request_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)
- { int unit = DEVICE_NR(cdi->dev);
-
- 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(unit,cmd,12,buffer,"read toc header");
- tochdr->cdth_trk0 = buffer[2];
- tochdr->cdth_trk1 = buffer[3];
-
- return r * EIO;
- }
-
- 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(unit,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;
- }
- 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];
- int k;
- int unit = DEVICE_NR(cdi->dev);
- if (pcd_atapi(unit,cmd,24,buffer,"get mcn")) return -EIO;
- for (k=0;k<13;k++) mcn->medium_catalog_number[k] = buffer[k+9];
- mcn->medium_catalog_number[13] = 0;
-
- return 0;
- }
- /* end of pcd.c */
- MODULE_LICENSE("GPL");