mirror of
https://github.com/adulau/aha.git
synced 2024-12-29 12:16:20 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
568 lines
15 KiB
C
568 lines
15 KiB
C
#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/fs.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/blkdev.h>
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#include <linux/blkpg.h>
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#include <linux/cdrom.h>
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#include <linux/delay.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_dbg.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_eh.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_ioctl.h>
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#include <scsi/scsi_request.h>
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#include "sr.h"
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#if 0
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#define DEBUG
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#endif
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/* The sr_is_xa() seems to trigger firmware bugs with some drives :-(
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* It is off by default and can be turned on with this module parameter */
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static int xa_test = 0;
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module_param(xa_test, int, S_IRUGO | S_IWUSR);
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#define IOCTL_RETRIES 3
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/* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives
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are emulating a SCSI device via the idescsi module, they need to have
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CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */
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static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti)
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{
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struct cdrom_tocentry trk0_te, trk1_te;
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struct cdrom_tochdr tochdr;
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struct packet_command cgc;
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int ntracks, ret;
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if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCHDR, &tochdr)))
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return ret;
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ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
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if (ti->cdti_trk1 == ntracks)
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ti->cdti_trk1 = CDROM_LEADOUT;
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else if (ti->cdti_trk1 != CDROM_LEADOUT)
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ti->cdti_trk1 ++;
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trk0_te.cdte_track = ti->cdti_trk0;
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trk0_te.cdte_format = CDROM_MSF;
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trk1_te.cdte_track = ti->cdti_trk1;
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trk1_te.cdte_format = CDROM_MSF;
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if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &trk0_te)))
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return ret;
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if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &trk1_te)))
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return ret;
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memset(&cgc, 0, sizeof(struct packet_command));
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cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
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cgc.cmd[3] = trk0_te.cdte_addr.msf.minute;
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cgc.cmd[4] = trk0_te.cdte_addr.msf.second;
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cgc.cmd[5] = trk0_te.cdte_addr.msf.frame;
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cgc.cmd[6] = trk1_te.cdte_addr.msf.minute;
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cgc.cmd[7] = trk1_te.cdte_addr.msf.second;
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cgc.cmd[8] = trk1_te.cdte_addr.msf.frame;
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cgc.data_direction = DMA_NONE;
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cgc.timeout = IOCTL_TIMEOUT;
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return sr_do_ioctl(cdi->handle, &cgc);
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}
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/* We do our own retries because we want to know what the specific
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error code is. Normally the UNIT_ATTENTION code will automatically
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clear after one error */
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int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc)
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{
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struct scsi_request *SRpnt;
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struct scsi_device *SDev;
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struct request *req;
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int result, err = 0, retries = 0;
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SDev = cd->device;
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SRpnt = scsi_allocate_request(SDev, GFP_KERNEL);
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if (!SRpnt) {
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printk(KERN_ERR "Unable to allocate SCSI request in sr_do_ioctl");
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err = -ENOMEM;
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goto out;
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}
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SRpnt->sr_data_direction = cgc->data_direction;
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retry:
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if (!scsi_block_when_processing_errors(SDev)) {
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err = -ENODEV;
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goto out_free;
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}
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scsi_wait_req(SRpnt, cgc->cmd, cgc->buffer, cgc->buflen,
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cgc->timeout, IOCTL_RETRIES);
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req = SRpnt->sr_request;
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if (SRpnt->sr_buffer && req->buffer && SRpnt->sr_buffer != req->buffer) {
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memcpy(req->buffer, SRpnt->sr_buffer, SRpnt->sr_bufflen);
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kfree(SRpnt->sr_buffer);
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SRpnt->sr_buffer = req->buffer;
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}
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result = SRpnt->sr_result;
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/* Minimal error checking. Ignore cases we know about, and report the rest. */
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if (driver_byte(result) != 0) {
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switch (SRpnt->sr_sense_buffer[2] & 0xf) {
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case UNIT_ATTENTION:
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SDev->changed = 1;
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if (!cgc->quiet)
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printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name);
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if (retries++ < 10)
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goto retry;
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err = -ENOMEDIUM;
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break;
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case NOT_READY: /* This happens if there is no disc in drive */
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if (SRpnt->sr_sense_buffer[12] == 0x04 &&
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SRpnt->sr_sense_buffer[13] == 0x01) {
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/* sense: Logical unit is in process of becoming ready */
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if (!cgc->quiet)
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printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name);
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if (retries++ < 10) {
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/* sleep 2 sec and try again */
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ssleep(2);
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goto retry;
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} else {
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/* 20 secs are enough? */
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err = -ENOMEDIUM;
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break;
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}
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}
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if (!cgc->quiet)
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printk(KERN_INFO "%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd->cdi.name);
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#ifdef DEBUG
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scsi_print_req_sense("sr", SRpnt);
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#endif
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err = -ENOMEDIUM;
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break;
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case ILLEGAL_REQUEST:
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err = -EIO;
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if (SRpnt->sr_sense_buffer[12] == 0x20 &&
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SRpnt->sr_sense_buffer[13] == 0x00)
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/* sense: Invalid command operation code */
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err = -EDRIVE_CANT_DO_THIS;
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#ifdef DEBUG
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__scsi_print_command(cgc->cmd);
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scsi_print_req_sense("sr", SRpnt);
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#endif
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break;
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default:
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printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name);
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__scsi_print_command(cgc->cmd);
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scsi_print_req_sense("sr", SRpnt);
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err = -EIO;
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}
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}
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if (cgc->sense)
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memcpy(cgc->sense, SRpnt->sr_sense_buffer, sizeof(*cgc->sense));
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/* Wake up a process waiting for device */
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out_free:
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scsi_release_request(SRpnt);
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SRpnt = NULL;
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out:
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cgc->stat = err;
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return err;
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}
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/* ---------------------------------------------------------------------- */
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/* interface to cdrom.c */
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static int test_unit_ready(Scsi_CD *cd)
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{
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struct packet_command cgc;
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memset(&cgc, 0, sizeof(struct packet_command));
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cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
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cgc.quiet = 1;
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cgc.data_direction = DMA_NONE;
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cgc.timeout = IOCTL_TIMEOUT;
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return sr_do_ioctl(cd, &cgc);
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}
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int sr_tray_move(struct cdrom_device_info *cdi, int pos)
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{
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Scsi_CD *cd = cdi->handle;
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struct packet_command cgc;
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memset(&cgc, 0, sizeof(struct packet_command));
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cgc.cmd[0] = GPCMD_START_STOP_UNIT;
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cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ;
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cgc.data_direction = DMA_NONE;
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cgc.timeout = IOCTL_TIMEOUT;
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return sr_do_ioctl(cd, &cgc);
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}
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int sr_lock_door(struct cdrom_device_info *cdi, int lock)
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{
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Scsi_CD *cd = cdi->handle;
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return scsi_set_medium_removal(cd->device, lock ?
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SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);
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}
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int sr_drive_status(struct cdrom_device_info *cdi, int slot)
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{
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if (CDSL_CURRENT != slot) {
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/* we have no changer support */
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return -EINVAL;
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}
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if (0 == test_unit_ready(cdi->handle))
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return CDS_DISC_OK;
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return CDS_TRAY_OPEN;
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}
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int sr_disk_status(struct cdrom_device_info *cdi)
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{
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Scsi_CD *cd = cdi->handle;
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struct cdrom_tochdr toc_h;
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struct cdrom_tocentry toc_e;
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int i, rc, have_datatracks = 0;
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/* look for data tracks */
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if (0 != (rc = sr_audio_ioctl(cdi, CDROMREADTOCHDR, &toc_h)))
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return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
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for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
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toc_e.cdte_track = i;
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toc_e.cdte_format = CDROM_LBA;
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if (sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &toc_e))
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return CDS_NO_INFO;
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if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
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have_datatracks = 1;
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break;
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}
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}
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if (!have_datatracks)
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return CDS_AUDIO;
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if (cd->xa_flag)
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return CDS_XA_2_1;
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else
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return CDS_DATA_1;
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}
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int sr_get_last_session(struct cdrom_device_info *cdi,
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struct cdrom_multisession *ms_info)
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{
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Scsi_CD *cd = cdi->handle;
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ms_info->addr.lba = cd->ms_offset;
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ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0;
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return 0;
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}
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/* primitive to determine whether we need to have GFP_DMA set based on
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* the status of the unchecked_isa_dma flag in the host structure */
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#define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0)
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int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
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{
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Scsi_CD *cd = cdi->handle;
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struct packet_command cgc;
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char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
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int result;
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memset(&cgc, 0, sizeof(struct packet_command));
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cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
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cgc.cmd[2] = 0x40; /* I do want the subchannel info */
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cgc.cmd[3] = 0x02; /* Give me medium catalog number info */
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cgc.cmd[8] = 24;
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cgc.buffer = buffer;
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cgc.buflen = 24;
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cgc.data_direction = DMA_FROM_DEVICE;
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cgc.timeout = IOCTL_TIMEOUT;
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result = sr_do_ioctl(cd, &cgc);
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memcpy(mcn->medium_catalog_number, buffer + 9, 13);
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mcn->medium_catalog_number[13] = 0;
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kfree(buffer);
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return result;
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}
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int sr_reset(struct cdrom_device_info *cdi)
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{
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return 0;
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}
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int sr_select_speed(struct cdrom_device_info *cdi, int speed)
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{
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Scsi_CD *cd = cdi->handle;
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struct packet_command cgc;
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if (speed == 0)
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speed = 0xffff; /* set to max */
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else
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speed *= 177; /* Nx to kbyte/s */
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memset(&cgc, 0, sizeof(struct packet_command));
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cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */
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cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */
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cgc.cmd[3] = speed & 0xff; /* LSB */
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cgc.data_direction = DMA_NONE;
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cgc.timeout = IOCTL_TIMEOUT;
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if (sr_do_ioctl(cd, &cgc))
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return -EIO;
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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/* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */
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/* because the generic cdrom driver does the user access stuff for us. */
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/* only cdromreadtochdr and cdromreadtocentry are left - for use with the */
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/* sr_disk_status interface for the generic cdrom driver. */
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int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
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{
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Scsi_CD *cd = cdi->handle;
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struct packet_command cgc;
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int result;
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unsigned char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
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if (!buffer)
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return -ENOMEM;
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memset(&cgc, 0, sizeof(struct packet_command));
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cgc.timeout = IOCTL_TIMEOUT;
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switch (cmd) {
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case CDROMREADTOCHDR:
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{
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struct cdrom_tochdr *tochdr = (struct cdrom_tochdr *) arg;
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cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
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cgc.cmd[8] = 12; /* LSB of length */
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cgc.buffer = buffer;
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cgc.buflen = 12;
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cgc.quiet = 1;
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cgc.data_direction = DMA_FROM_DEVICE;
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result = sr_do_ioctl(cd, &cgc);
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tochdr->cdth_trk0 = buffer[2];
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tochdr->cdth_trk1 = buffer[3];
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break;
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}
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case CDROMREADTOCENTRY:
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{
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struct cdrom_tocentry *tocentry = (struct cdrom_tocentry *) arg;
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cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
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cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0;
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cgc.cmd[6] = tocentry->cdte_track;
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cgc.cmd[8] = 12; /* LSB of length */
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cgc.buffer = buffer;
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cgc.buflen = 12;
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cgc.data_direction = DMA_FROM_DEVICE;
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result = sr_do_ioctl(cd, &cgc);
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tocentry->cdte_ctrl = buffer[5] & 0xf;
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tocentry->cdte_adr = buffer[5] >> 4;
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tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
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if (tocentry->cdte_format == CDROM_MSF) {
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tocentry->cdte_addr.msf.minute = buffer[9];
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tocentry->cdte_addr.msf.second = buffer[10];
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tocentry->cdte_addr.msf.frame = buffer[11];
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} else
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tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
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+ buffer[10]) << 8) + buffer[11];
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break;
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}
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case CDROMPLAYTRKIND: {
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struct cdrom_ti* ti = (struct cdrom_ti*)arg;
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cgc.cmd[0] = GPCMD_PLAYAUDIO_TI;
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cgc.cmd[4] = ti->cdti_trk0;
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cgc.cmd[5] = ti->cdti_ind0;
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cgc.cmd[7] = ti->cdti_trk1;
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cgc.cmd[8] = ti->cdti_ind1;
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cgc.data_direction = DMA_NONE;
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result = sr_do_ioctl(cd, &cgc);
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if (result == -EDRIVE_CANT_DO_THIS)
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result = sr_fake_playtrkind(cdi, ti);
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break;
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}
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default:
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result = -EINVAL;
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}
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#if 0
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if (result)
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printk("DEBUG: sr_audio: result for ioctl %x: %x\n", cmd, result);
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#endif
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kfree(buffer);
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return result;
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}
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/* -----------------------------------------------------------------------
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* a function to read all sorts of funny cdrom sectors using the READ_CD
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* scsi-3 mmc command
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*
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* lba: linear block address
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* format: 0 = data (anything)
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* 1 = audio
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* 2 = data (mode 1)
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* 3 = data (mode 2)
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* 4 = data (mode 2 form1)
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* 5 = data (mode 2 form2)
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* blksize: 2048 | 2336 | 2340 | 2352
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*/
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static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize)
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{
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struct packet_command cgc;
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#ifdef DEBUG
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printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n",
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cd->cdi.name, lba, format, blksize);
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#endif
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memset(&cgc, 0, sizeof(struct packet_command));
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cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */
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cgc.cmd[1] = ((format & 7) << 2);
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cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
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cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
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cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
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cgc.cmd[5] = (unsigned char) lba & 0xff;
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cgc.cmd[8] = 1;
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switch (blksize) {
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case 2336:
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cgc.cmd[9] = 0x58;
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break;
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case 2340:
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cgc.cmd[9] = 0x78;
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break;
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case 2352:
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cgc.cmd[9] = 0xf8;
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break;
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default:
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cgc.cmd[9] = 0x10;
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break;
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}
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cgc.buffer = dest;
|
|
cgc.buflen = blksize;
|
|
cgc.data_direction = DMA_FROM_DEVICE;
|
|
cgc.timeout = IOCTL_TIMEOUT;
|
|
return sr_do_ioctl(cd, &cgc);
|
|
}
|
|
|
|
/*
|
|
* read sectors with blocksizes other than 2048
|
|
*/
|
|
|
|
static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest)
|
|
{
|
|
struct packet_command cgc;
|
|
int rc;
|
|
|
|
/* we try the READ CD command first... */
|
|
if (cd->readcd_known) {
|
|
rc = sr_read_cd(cd, dest, lba, 0, blksize);
|
|
if (-EDRIVE_CANT_DO_THIS != rc)
|
|
return rc;
|
|
cd->readcd_known = 0;
|
|
printk("CDROM does'nt support READ CD (0xbe) command\n");
|
|
/* fall & retry the other way */
|
|
}
|
|
/* ... if this fails, we switch the blocksize using MODE SELECT */
|
|
if (blksize != cd->device->sector_size) {
|
|
if (0 != (rc = sr_set_blocklength(cd, blksize)))
|
|
return rc;
|
|
}
|
|
#ifdef DEBUG
|
|
printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize);
|
|
#endif
|
|
|
|
memset(&cgc, 0, sizeof(struct packet_command));
|
|
cgc.cmd[0] = GPCMD_READ_10;
|
|
cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
|
|
cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
|
|
cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
|
|
cgc.cmd[5] = (unsigned char) lba & 0xff;
|
|
cgc.cmd[8] = 1;
|
|
cgc.buffer = dest;
|
|
cgc.buflen = blksize;
|
|
cgc.data_direction = DMA_FROM_DEVICE;
|
|
cgc.timeout = IOCTL_TIMEOUT;
|
|
rc = sr_do_ioctl(cd, &cgc);
|
|
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* read a sector in raw mode to check the sector format
|
|
* ret: 1 == mode2 (XA), 0 == mode1, <0 == error
|
|
*/
|
|
|
|
int sr_is_xa(Scsi_CD *cd)
|
|
{
|
|
unsigned char *raw_sector;
|
|
int is_xa;
|
|
|
|
if (!xa_test)
|
|
return 0;
|
|
|
|
raw_sector = (unsigned char *) kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd));
|
|
if (!raw_sector)
|
|
return -ENOMEM;
|
|
if (0 == sr_read_sector(cd, cd->ms_offset + 16,
|
|
CD_FRAMESIZE_RAW1, raw_sector)) {
|
|
is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
|
|
} else {
|
|
/* read a raw sector failed for some reason. */
|
|
is_xa = -1;
|
|
}
|
|
kfree(raw_sector);
|
|
#ifdef DEBUG
|
|
printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa);
|
|
#endif
|
|
return is_xa;
|
|
}
|
|
|
|
int sr_dev_ioctl(struct cdrom_device_info *cdi,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
Scsi_CD *cd = cdi->handle;
|
|
int ret;
|
|
|
|
ret = scsi_nonblockable_ioctl(cd->device, cmd,
|
|
(void __user *)arg, NULL);
|
|
/*
|
|
* ENODEV means that we didn't recognise the ioctl, or that we
|
|
* cannot execute it in the current device state. In either
|
|
* case fall through to scsi_ioctl, which will return ENDOEV again
|
|
* if it doesn't recognise the ioctl
|
|
*/
|
|
if (ret != -ENODEV)
|
|
return ret;
|
|
return scsi_ioctl(cd->device, cmd, (void __user *)arg);
|
|
}
|