1023 lines
25 KiB
C
Executable file
1023 lines
25 KiB
C
Executable file
/*
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pcd.c (c) 1997-8 Grant R. Guenther <grant@torque.net>
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Under the terms of the GNU General Public License.
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This is a high-level driver for parallel port ATAPI CD-ROM
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drives based on chips supported by the paride module.
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By default, the driver will autoprobe for a single parallel
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port ATAPI CD-ROM drive, but if their individual parameters are
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specified, the driver can handle up to 4 drives.
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The behaviour of the pcd driver can be altered by setting
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some parameters from the insmod command line. The following
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parameters are adjustable:
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drive0 These four arguments can be arrays of
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drive1 1-6 integers as follows:
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drive2
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drive3 <prt>,<pro>,<uni>,<mod>,<slv>,<dly>
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Where,
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<prt> is the base of the parallel port address for
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the corresponding drive. (required)
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<pro> is the protocol number for the adapter that
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supports this drive. These numbers are
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logged by 'paride' when the protocol modules
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are initialised. (0 if not given)
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<uni> for those adapters that support chained
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devices, this is the unit selector for the
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chain of devices on the given port. It should
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be zero for devices that don't support chaining.
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(0 if not given)
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<mod> this can be -1 to choose the best mode, or one
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of the mode numbers supported by the adapter.
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(-1 if not given)
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<slv> ATAPI CD-ROMs can be jumpered to master or slave.
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Set this to 0 to choose the master drive, 1 to
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choose the slave, -1 (the default) to choose the
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first drive found.
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<dly> some parallel ports require the driver to
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go more slowly. -1 sets a default value that
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should work with the chosen protocol. Otherwise,
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set this to a small integer, the larger it is
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the slower the port i/o. In some cases, setting
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this to zero will speed up the device. (default -1)
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major You may use this parameter to override the
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default major number (46) that this driver
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will use. Be sure to change the device
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name as well.
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name This parameter is a character string that
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contains the name the kernel will use for this
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device (in /proc output, for instance).
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(default "pcd")
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verbose This parameter controls the amount of logging
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that the driver will do. Set it to 0 for
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normal operation, 1 to see autoprobe progress
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messages, or 2 to see additional debugging
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output. (default 0)
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nice This parameter controls the driver's use of
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idle CPU time, at the expense of some speed.
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If this driver is built into the kernel, you can use the
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following kernel command line parameters, with the same values
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as the corresponding module parameters listed above:
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pcd.drive0
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pcd.drive1
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pcd.drive2
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pcd.drive3
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pcd.nice
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In addition, you can use the parameter pcd.disable to disable
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the driver entirely.
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*/
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/* Changes:
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1.01 GRG 1998.01.24 Added test unit ready support
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1.02 GRG 1998.05.06 Changes to pcd_completion, ready_wait,
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and loosen interpretation of ATAPI
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standard for clearing error status.
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Use spinlocks. Eliminate sti().
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1.03 GRG 1998.06.16 Eliminated an Ugh
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1.04 GRG 1998.08.15 Added extra debugging, improvements to
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pcd_completion, use HZ in loop timing
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1.05 GRG 1998.08.16 Conformed to "Uniform CD-ROM" standard
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1.06 GRG 1998.08.19 Added audio ioctl support
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1.07 GRG 1998.09.24 Increased reset timeout, added jumbo support
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*/
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#define PCD_VERSION "1.07"
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#define PCD_MAJOR 46
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#define PCD_NAME "pcd"
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#define PCD_UNITS 4
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/* Here are things one can override from the insmod command.
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Most are autoprobed by paride unless set here. Verbose is off
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by default.
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*/
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static int verbose = 0;
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static int major = PCD_MAJOR;
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static char *name = PCD_NAME;
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static int nice = 0;
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static int disable = 0;
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static int drive0[6] = { 0, 0, 0, -1, -1, -1 };
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static int drive1[6] = { 0, 0, 0, -1, -1, -1 };
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static int drive2[6] = { 0, 0, 0, -1, -1, -1 };
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static int drive3[6] = { 0, 0, 0, -1, -1, -1 };
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static int (*drives[4])[6] = {&drive0, &drive1, &drive2, &drive3};
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static int pcd_drive_count;
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enum {D_PRT, D_PRO, D_UNI, D_MOD, D_SLV, D_DLY};
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/* end of parameters */
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/cdrom.h>
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#include <linux/spinlock.h>
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#include <linux/blkdev.h>
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#include <linux/mutex.h>
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#include <linux/uaccess.h>
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static DEFINE_MUTEX(pcd_mutex);
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static DEFINE_SPINLOCK(pcd_lock);
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module_param(verbose, int, 0644);
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module_param(major, int, 0);
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module_param(name, charp, 0);
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module_param(nice, int, 0);
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module_param_array(drive0, int, NULL, 0);
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module_param_array(drive1, int, NULL, 0);
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module_param_array(drive2, int, NULL, 0);
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module_param_array(drive3, int, NULL, 0);
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#include "paride.h"
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#include "pseudo.h"
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#define PCD_RETRIES 5
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#define PCD_TMO 800 /* timeout in jiffies */
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#define PCD_DELAY 50 /* spin delay in uS */
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#define PCD_READY_TMO 20 /* in seconds */
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#define PCD_RESET_TMO 100 /* in tenths of a second */
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#define PCD_SPIN (1000000*PCD_TMO)/(HZ*PCD_DELAY)
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#define IDE_ERR 0x01
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#define IDE_DRQ 0x08
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#define IDE_READY 0x40
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#define IDE_BUSY 0x80
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static int pcd_open(struct cdrom_device_info *cdi, int purpose);
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static void pcd_release(struct cdrom_device_info *cdi);
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static int pcd_drive_status(struct cdrom_device_info *cdi, int slot_nr);
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static unsigned int pcd_check_events(struct cdrom_device_info *cdi,
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unsigned int clearing, int slot_nr);
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static int pcd_tray_move(struct cdrom_device_info *cdi, int position);
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static int pcd_lock_door(struct cdrom_device_info *cdi, int lock);
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static int pcd_drive_reset(struct cdrom_device_info *cdi);
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static int pcd_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn);
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static int pcd_audio_ioctl(struct cdrom_device_info *cdi,
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unsigned int cmd, void *arg);
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static int pcd_packet(struct cdrom_device_info *cdi,
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struct packet_command *cgc);
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static int pcd_detect(void);
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static void pcd_probe_capabilities(void);
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static void do_pcd_read_drq(void);
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static void do_pcd_request(struct request_queue * q);
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static void do_pcd_read(void);
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struct pcd_unit {
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struct pi_adapter pia; /* interface to paride layer */
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struct pi_adapter *pi;
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int drive; /* master/slave */
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int last_sense; /* result of last request sense */
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int changed; /* media change seen */
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int present; /* does this unit exist ? */
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char *name; /* pcd0, pcd1, etc */
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struct cdrom_device_info info; /* uniform cdrom interface */
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struct gendisk *disk;
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};
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static struct pcd_unit pcd[PCD_UNITS];
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static char pcd_scratch[64];
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static char pcd_buffer[2048]; /* raw block buffer */
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static int pcd_bufblk = -1; /* block in buffer, in CD units,
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-1 for nothing there. See also
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pd_unit.
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*/
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/* the variables below are used mainly in the I/O request engine, which
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processes only one request at a time.
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*/
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static struct pcd_unit *pcd_current; /* current request's drive */
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static struct request *pcd_req;
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static int pcd_retries; /* retries on current request */
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static int pcd_busy; /* request being processed ? */
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static int pcd_sector; /* address of next requested sector */
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static int pcd_count; /* number of blocks still to do */
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static char *pcd_buf; /* buffer for request in progress */
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static void *par_drv; /* reference of parport driver */
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/* kernel glue structures */
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static int pcd_block_open(struct block_device *bdev, fmode_t mode)
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{
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struct pcd_unit *cd = bdev->bd_disk->private_data;
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int ret;
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check_disk_change(bdev);
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mutex_lock(&pcd_mutex);
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ret = cdrom_open(&cd->info, bdev, mode);
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mutex_unlock(&pcd_mutex);
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return ret;
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}
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static void pcd_block_release(struct gendisk *disk, fmode_t mode)
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{
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struct pcd_unit *cd = disk->private_data;
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mutex_lock(&pcd_mutex);
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cdrom_release(&cd->info, mode);
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mutex_unlock(&pcd_mutex);
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}
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static int pcd_block_ioctl(struct block_device *bdev, fmode_t mode,
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unsigned cmd, unsigned long arg)
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{
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struct pcd_unit *cd = bdev->bd_disk->private_data;
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int ret;
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mutex_lock(&pcd_mutex);
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ret = cdrom_ioctl(&cd->info, bdev, mode, cmd, arg);
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mutex_unlock(&pcd_mutex);
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return ret;
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}
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static unsigned int pcd_block_check_events(struct gendisk *disk,
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unsigned int clearing)
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{
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struct pcd_unit *cd = disk->private_data;
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return cdrom_check_events(&cd->info, clearing);
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}
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static const struct block_device_operations pcd_bdops = {
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.owner = THIS_MODULE,
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.open = pcd_block_open,
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.release = pcd_block_release,
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.ioctl = pcd_block_ioctl,
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.check_events = pcd_block_check_events,
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};
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static const struct cdrom_device_ops pcd_dops = {
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.open = pcd_open,
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.release = pcd_release,
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.drive_status = pcd_drive_status,
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.check_events = pcd_check_events,
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.tray_move = pcd_tray_move,
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.lock_door = pcd_lock_door,
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.get_mcn = pcd_get_mcn,
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.reset = pcd_drive_reset,
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.audio_ioctl = pcd_audio_ioctl,
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.generic_packet = pcd_packet,
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.capability = CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK |
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CDC_MCN | CDC_MEDIA_CHANGED | CDC_RESET |
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CDC_PLAY_AUDIO | CDC_GENERIC_PACKET | CDC_CD_R |
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CDC_CD_RW,
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};
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static void pcd_init_units(void)
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{
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struct pcd_unit *cd;
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int unit;
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pcd_drive_count = 0;
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for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
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struct gendisk *disk = alloc_disk(1);
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if (!disk)
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continue;
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disk->queue = blk_init_queue(do_pcd_request, &pcd_lock);
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if (!disk->queue) {
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put_disk(disk);
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continue;
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}
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blk_queue_bounce_limit(disk->queue, BLK_BOUNCE_HIGH);
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cd->disk = disk;
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cd->pi = &cd->pia;
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cd->present = 0;
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cd->last_sense = 0;
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cd->changed = 1;
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cd->drive = (*drives[unit])[D_SLV];
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if ((*drives[unit])[D_PRT])
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pcd_drive_count++;
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cd->name = &cd->info.name[0];
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snprintf(cd->name, sizeof(cd->info.name), "%s%d", name, unit);
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cd->info.ops = &pcd_dops;
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cd->info.handle = cd;
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cd->info.speed = 0;
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cd->info.capacity = 1;
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cd->info.mask = 0;
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disk->major = major;
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disk->first_minor = unit;
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strcpy(disk->disk_name, cd->name); /* umm... */
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disk->fops = &pcd_bdops;
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disk->flags = GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
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}
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}
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static int pcd_open(struct cdrom_device_info *cdi, int purpose)
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{
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struct pcd_unit *cd = cdi->handle;
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if (!cd->present)
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return -ENODEV;
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return 0;
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}
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static void pcd_release(struct cdrom_device_info *cdi)
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{
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}
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static inline int status_reg(struct pcd_unit *cd)
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{
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return pi_read_regr(cd->pi, 1, 6);
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}
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static inline int read_reg(struct pcd_unit *cd, int reg)
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{
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return pi_read_regr(cd->pi, 0, reg);
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}
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static inline void write_reg(struct pcd_unit *cd, int reg, int val)
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{
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pi_write_regr(cd->pi, 0, reg, val);
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}
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static int pcd_wait(struct pcd_unit *cd, int go, int stop, char *fun, char *msg)
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{
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int j, r, e, s, p;
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j = 0;
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while ((((r = status_reg(cd)) & go) || (stop && (!(r & stop))))
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&& (j++ < PCD_SPIN))
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udelay(PCD_DELAY);
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if ((r & (IDE_ERR & stop)) || (j > PCD_SPIN)) {
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s = read_reg(cd, 7);
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e = read_reg(cd, 1);
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p = read_reg(cd, 2);
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if (j > PCD_SPIN)
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e |= 0x100;
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if (fun)
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printk("%s: %s %s: alt=0x%x stat=0x%x err=0x%x"
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" loop=%d phase=%d\n",
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cd->name, fun, msg, r, s, e, j, p);
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return (s << 8) + r;
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}
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return 0;
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}
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static int pcd_command(struct pcd_unit *cd, char *cmd, int dlen, char *fun)
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{
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pi_connect(cd->pi);
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write_reg(cd, 6, 0xa0 + 0x10 * cd->drive);
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if (pcd_wait(cd, IDE_BUSY | IDE_DRQ, 0, fun, "before command")) {
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pi_disconnect(cd->pi);
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return -1;
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}
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write_reg(cd, 4, dlen % 256);
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write_reg(cd, 5, dlen / 256);
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write_reg(cd, 7, 0xa0); /* ATAPI packet command */
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if (pcd_wait(cd, IDE_BUSY, IDE_DRQ, fun, "command DRQ")) {
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pi_disconnect(cd->pi);
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return -1;
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}
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if (read_reg(cd, 2) != 1) {
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printk("%s: %s: command phase error\n", cd->name, fun);
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pi_disconnect(cd->pi);
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return -1;
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}
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pi_write_block(cd->pi, cmd, 12);
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return 0;
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}
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static int pcd_completion(struct pcd_unit *cd, char *buf, char *fun)
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{
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int r, d, p, n, k, j;
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r = -1;
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k = 0;
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j = 0;
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if (!pcd_wait(cd, IDE_BUSY, IDE_DRQ | IDE_READY | IDE_ERR,
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fun, "completion")) {
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r = 0;
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while (read_reg(cd, 7) & IDE_DRQ) {
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d = read_reg(cd, 4) + 256 * read_reg(cd, 5);
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n = (d + 3) & 0xfffc;
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p = read_reg(cd, 2) & 3;
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if ((p == 2) && (n > 0) && (j == 0)) {
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pi_read_block(cd->pi, buf, n);
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if (verbose > 1)
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printk("%s: %s: Read %d bytes\n",
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cd->name, fun, n);
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r = 0;
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j++;
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} else {
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if (verbose > 1)
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printk
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("%s: %s: Unexpected phase %d, d=%d, k=%d\n",
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cd->name, fun, p, d, k);
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if (verbose < 2)
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printk_once(
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"%s: WARNING: ATAPI phase errors\n",
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cd->name);
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mdelay(1);
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}
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if (k++ > PCD_TMO) {
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printk("%s: Stuck DRQ\n", cd->name);
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break;
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}
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if (pcd_wait
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(cd, IDE_BUSY, IDE_DRQ | IDE_READY | IDE_ERR, fun,
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"completion")) {
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r = -1;
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break;
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}
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}
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}
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pi_disconnect(cd->pi);
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return r;
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}
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|
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static void pcd_req_sense(struct pcd_unit *cd, char *fun)
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{
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char rs_cmd[12] = { 0x03, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0 };
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char buf[16];
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int r, c;
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r = pcd_command(cd, rs_cmd, 16, "Request sense");
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mdelay(1);
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if (!r)
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pcd_completion(cd, buf, "Request sense");
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cd->last_sense = -1;
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c = 2;
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if (!r) {
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if (fun)
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printk("%s: %s: Sense key: %x, ASC: %x, ASQ: %x\n",
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cd->name, fun, buf[2] & 0xf, buf[12], buf[13]);
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c = buf[2] & 0xf;
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cd->last_sense =
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c | ((buf[12] & 0xff) << 8) | ((buf[13] & 0xff) << 16);
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}
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if ((c == 2) || (c == 6))
|
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cd->changed = 1;
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}
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|
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static int pcd_atapi(struct pcd_unit *cd, char *cmd, int dlen, char *buf, char *fun)
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{
|
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int r;
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|
|
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 unsigned int pcd_check_events(struct cdrom_device_info *cdi,
|
|
unsigned int clearing, int slot_nr)
|
|
{
|
|
struct pcd_unit *cd = cdi->handle;
|
|
int res = cd->changed;
|
|
if (res)
|
|
cd->changed = 0;
|
|
return res ? DISK_EVENT_MEDIA_CHANGE : 0;
|
|
}
|
|
|
|
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)
|
|
{
|
|
schedule_timeout_interruptible(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);
|
|
|
|
par_drv = pi_register_driver(name);
|
|
if (!par_drv) {
|
|
pr_err("failed to register %s driver\n", name);
|
|
return -1;
|
|
}
|
|
|
|
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);
|
|
pi_unregister_driver(par_drv);
|
|
return -1;
|
|
}
|
|
|
|
/* I/O request processing */
|
|
static int pcd_queue;
|
|
|
|
static int set_next_request(void)
|
|
{
|
|
struct pcd_unit *cd;
|
|
struct request_queue *q;
|
|
int old_pos = pcd_queue;
|
|
|
|
do {
|
|
cd = &pcd[pcd_queue];
|
|
q = cd->present ? cd->disk->queue : NULL;
|
|
if (++pcd_queue == PCD_UNITS)
|
|
pcd_queue = 0;
|
|
if (q) {
|
|
pcd_req = blk_fetch_request(q);
|
|
if (pcd_req)
|
|
break;
|
|
}
|
|
} while (pcd_queue != old_pos);
|
|
|
|
return pcd_req != NULL;
|
|
}
|
|
|
|
static void pcd_request(void)
|
|
{
|
|
if (pcd_busy)
|
|
return;
|
|
while (1) {
|
|
if (!pcd_req && !set_next_request())
|
|
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 = blk_rq_pos(pcd_req);
|
|
pcd_count = blk_rq_cur_sectors(pcd_req);
|
|
pcd_buf = bio_data(pcd_req->bio);
|
|
pcd_busy = 1;
|
|
ps_set_intr(do_pcd_read, NULL, 0, nice);
|
|
return;
|
|
} else {
|
|
__blk_end_request_all(pcd_req, BLK_STS_IOERR);
|
|
pcd_req = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void do_pcd_request(struct request_queue *q)
|
|
{
|
|
pcd_request();
|
|
}
|
|
|
|
static inline void next_request(blk_status_t err)
|
|
{
|
|
unsigned long saved_flags;
|
|
|
|
spin_lock_irqsave(&pcd_lock, saved_flags);
|
|
if (!__blk_end_request_cur(pcd_req, err))
|
|
pcd_req = NULL;
|
|
pcd_busy = 0;
|
|
pcd_request();
|
|
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(BLK_STS_IOERR);
|
|
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(0);
|
|
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(BLK_STS_IOERR);
|
|
return;
|
|
}
|
|
|
|
do_pcd_read();
|
|
spin_lock_irqsave(&pcd_lock, saved_flags);
|
|
pcd_request();
|
|
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 -EINVAL;
|
|
|
|
pcd_init_units();
|
|
|
|
if (pcd_detect())
|
|
return -ENODEV;
|
|
|
|
/* 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 -EBUSY;
|
|
}
|
|
|
|
for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
|
|
if (cd->present) {
|
|
register_cdrom(&cd->info);
|
|
cd->disk->private_data = cd;
|
|
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);
|
|
}
|
|
blk_cleanup_queue(cd->disk->queue);
|
|
put_disk(cd->disk);
|
|
}
|
|
unregister_blkdev(major, name);
|
|
pi_unregister_driver(par_drv);
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
module_init(pcd_init)
|
|
module_exit(pcd_exit)
|