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; sr_printk(KERN_INFO, cd, "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 sr_printk(KERN_INFO, cd, "sr_read_sector lba=%d blksize=%d\n", 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; }
int sr_cd_check(struct cdrom_device_info *cdi) { Scsi_CD *cd = cdi->handle; unsigned long sector; unsigned char *buffer; /* the buffer for the ioctl */ struct packet_command cgc; int rc, no_multi; if (cd->cdi.mask & CDC_MULTI_SESSION) return 0; buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); if (!buffer) return -ENOMEM; sector = 0; /* the multisession sector offset goes here */ no_multi = 0; /* flag: the drive can't handle multisession */ rc = 0; memset(&cgc, 0, sizeof(struct packet_command)); switch (cd->vendor) { case VENDOR_SCSI3: cgc.cmd[0] = READ_TOC; cgc.cmd[8] = 12; cgc.cmd[9] = 0x40; cgc.buffer = buffer; cgc.buflen = 12; cgc.quiet = 1; cgc.data_direction = DMA_FROM_DEVICE; cgc.timeout = VENDOR_TIMEOUT; rc = sr_do_ioctl(cd, &cgc); if (rc != 0) break; if ((buffer[0] << 8) + buffer[1] < 0x0a) { printk(KERN_INFO "%s: Hmm, seems the drive " "doesn't support multisession CD's\n", cd->cdi.name); no_multi = 1; break; } sector = buffer[11] + (buffer[10] << 8) + (buffer[9] << 16) + (buffer[8] << 24); if (buffer[6] <= 1) { /* ignore sector offsets from first track */ sector = 0; } break; #ifdef CONFIG_BLK_DEV_SR_VENDOR case VENDOR_NEC:{ unsigned long min, sec, frame; cgc.cmd[0] = 0xde; cgc.cmd[1] = 0x03; cgc.cmd[2] = 0xb0; cgc.buffer = buffer; cgc.buflen = 0x16; cgc.quiet = 1; cgc.data_direction = DMA_FROM_DEVICE; cgc.timeout = VENDOR_TIMEOUT; rc = sr_do_ioctl(cd, &cgc); if (rc != 0) break; if (buffer[14] != 0 && buffer[14] != 0xb0) { printk(KERN_INFO "%s: Hmm, seems the cdrom " "doesn't support multisession CD's\n", cd->cdi.name); no_multi = 1; break; } min = bcd2bin(buffer[15]); sec = bcd2bin(buffer[16]); frame = bcd2bin(buffer[17]); sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame; break; } case VENDOR_TOSHIBA:{ unsigned long min, sec, frame; /* we request some disc information (is it a XA-CD ?, * where starts the last session ?) */ cgc.cmd[0] = 0xc7; cgc.cmd[1] = 0x03; cgc.buffer = buffer; cgc.buflen = 4; cgc.quiet = 1; cgc.data_direction = DMA_FROM_DEVICE; cgc.timeout = VENDOR_TIMEOUT; rc = sr_do_ioctl(cd, &cgc); if (rc == -EINVAL) { printk(KERN_INFO "%s: Hmm, seems the drive " "doesn't support multisession CD's\n", cd->cdi.name); no_multi = 1; break; } if (rc != 0) break; min = bcd2bin(buffer[1]); sec = bcd2bin(buffer[2]); frame = bcd2bin(buffer[3]); sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame; if (sector) sector -= CD_MSF_OFFSET; sr_set_blocklength(cd, 2048); break; } case VENDOR_WRITER: cgc.cmd[0] = READ_TOC; cgc.cmd[8] = 0x04; cgc.cmd[9] = 0x40; cgc.buffer = buffer; cgc.buflen = 0x04; cgc.quiet = 1; cgc.data_direction = DMA_FROM_DEVICE; cgc.timeout = VENDOR_TIMEOUT; rc = sr_do_ioctl(cd, &cgc); if (rc != 0) { break; } if ((rc = buffer[2]) == 0) { printk(KERN_WARNING "%s: No finished session\n", cd->cdi.name); break; } cgc.cmd[0] = READ_TOC; /* Read TOC */ cgc.cmd[6] = rc & 0x7f; /* number of last session */ cgc.cmd[8] = 0x0c; cgc.cmd[9] = 0x40; cgc.buffer = buffer; cgc.buflen = 12; cgc.quiet = 1; cgc.data_direction = DMA_FROM_DEVICE; cgc.timeout = VENDOR_TIMEOUT; rc = sr_do_ioctl(cd, &cgc); if (rc != 0) { break; } sector = buffer[11] + (buffer[10] << 8) + (buffer[9] << 16) + (buffer[8] << 24); break; #endif /* CONFIG_BLK_DEV_SR_VENDOR */ default: /* should not happen */ printk(KERN_WARNING "%s: unknown vendor code (%i), not initialized ?\n", cd->cdi.name, cd->vendor); sector = 0; no_multi = 1; break; } cd->ms_offset = sector; cd->xa_flag = 0; if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(cd)) cd->xa_flag = 1; if (2048 != cd->device->sector_size) { sr_set_blocklength(cd, 2048); } if (no_multi) cdi->mask |= CDC_MULTI_SESSION; #ifdef DEBUG if (sector) printk(KERN_DEBUG "%s: multisession offset=%lu\n", cd->cdi.name, sector); #endif kfree(buffer); return rc; }