/* -*-linux-c-*- * vendor-specific code for SCSI CD-ROM's goes here. * * This is needed becauce most of the new features (multisession and * the like) are too new to be included into the SCSI-II standard (to * be exact: there is'nt anything in my draft copy). * * Aug 1997: Ha! Got a SCSI-3 cdrom spec across my fingers. SCSI-3 does * multisession using the READ TOC command (like SONY). * * Rearranged stuff here: SCSI-3 is included allways, support * for NEC/TOSHIBA/HP commands is optional. * * Gerd Knorr * * -------------------------------------------------------------------------- * * support for XA/multisession-CD's * * - NEC: Detection and support of multisession CD's. * * - TOSHIBA: Detection and support of multisession CD's. * Some XA-Sector tweaking, required for older drives. * * - SONY: Detection and support of multisession CD's. * added by Thomas Quinot * * - PIONEER, HITACHI, PLEXTOR, MATSHITA, TEAC, PHILIPS: known to * work with SONY (SCSI3 now) code. * * - HP: Much like SONY, but a little different... (Thomas) * HP-Writers only ??? Maybe other CD-Writers work with this too ? * HP 6020 writers now supported. */ #include #include #include #include #include "scsi.h" #include "hosts.h" #include #include #include "sr.h" #if 0 #define DEBUG #endif /* here are some constants to sort the vendors into groups */ #define VENDOR_SCSI3 1 /* default: scsi-3 mmc */ #define VENDOR_NEC 2 #define VENDOR_TOSHIBA 3 #define VENDOR_WRITER 4 /* pre-scsi3 writers */ #define VENDOR_ID (scsi_CDs[minor].vendor) void sr_vendor_init(int minor) { #ifndef CONFIG_BLK_DEV_SR_VENDOR VENDOR_ID = VENDOR_SCSI3; #else char *vendor = scsi_CDs[minor].device->vendor; char *model = scsi_CDs[minor].device->model; /* default */ VENDOR_ID = VENDOR_SCSI3; if (scsi_CDs[minor].readcd_known) /* this is true for scsi3/mmc drives - no more checks */ return; if (scsi_CDs[minor].device->type == TYPE_WORM) { VENDOR_ID = VENDOR_WRITER; } else if (!strncmp(vendor, "NEC", 3)) { VENDOR_ID = VENDOR_NEC; if (!strncmp(model, "CD-ROM DRIVE:25", 15) || !strncmp(model, "CD-ROM DRIVE:36", 15) || !strncmp(model, "CD-ROM DRIVE:83", 15) || !strncmp(model, "CD-ROM DRIVE:84 ", 16) #if 0 /* my NEC 3x returns the read-raw data if a read-raw is followed by a read for the same sector - aeb */ || !strncmp(model, "CD-ROM DRIVE:500", 16) #endif ) /* these can't handle multisession, may hang */ scsi_CDs[minor].cdi.mask |= CDC_MULTI_SESSION; } else if (!strncmp(vendor, "TOSHIBA", 7)) { VENDOR_ID = VENDOR_TOSHIBA; } #endif } /* small handy function for switching block length using MODE SELECT, * used by sr_read_sector() */ int sr_set_blocklength(int minor, int blocklength) { unsigned char *buffer; /* the buffer for the ioctl */ unsigned char cmd[MAX_COMMAND_SIZE]; /* the scsi-command */ struct ccs_modesel_head *modesel; int rc, density = 0; #ifdef CONFIG_BLK_DEV_SR_VENDOR if (VENDOR_ID == VENDOR_TOSHIBA) density = (blocklength > 2048) ? 0x81 : 0x83; #endif buffer = (unsigned char *) scsi_malloc(512); if (!buffer) return -ENOMEM; #ifdef DEBUG printk("sr%d: MODE SELECT 0x%x/%d\n", minor, density, blocklength); #endif memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = MODE_SELECT; cmd[1] = (scsi_CDs[minor].device->lun << 5) | (1 << 4); cmd[4] = 12; modesel = (struct ccs_modesel_head *) buffer; memset(modesel, 0, sizeof(*modesel)); modesel->block_desc_length = 0x08; modesel->density = density; modesel->block_length_med = (blocklength >> 8) & 0xff; modesel->block_length_lo = blocklength & 0xff; if (0 == (rc = sr_do_ioctl(minor, cmd, buffer, sizeof(*modesel), 0, SCSI_DATA_WRITE))) { scsi_CDs[minor].device->sector_size = blocklength; } #ifdef DEBUG else printk("sr%d: switching blocklength to %d bytes failed\n", minor, blocklength); #endif scsi_free(buffer, 512); return rc; } /* This function gets called after a media change. Checks if the CD is multisession, asks for offset etc. */ #define BCD_TO_BIN(x) ((((int)x & 0xf0) >> 4)*10 + ((int)x & 0x0f)) int sr_cd_check(struct cdrom_device_info *cdi) { unsigned long sector; unsigned char *buffer; /* the buffer for the ioctl */ unsigned char cmd[MAX_COMMAND_SIZE]; /* the scsi-command */ int rc, no_multi, minor; minor = MINOR(cdi->dev); if (scsi_CDs[minor].cdi.mask & CDC_MULTI_SESSION) return 0; buffer = (unsigned char *) scsi_malloc(512); if (!buffer) return -ENOMEM; sector = 0; /* the multisession sector offset goes here */ no_multi = 0; /* flag: the drive can't handle multisession */ rc = 0; switch (VENDOR_ID) { case VENDOR_SCSI3: memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = READ_TOC; cmd[1] = (scsi_CDs[minor].device->lun << 5); cmd[8] = 12; cmd[9] = 0x40; rc = sr_do_ioctl(minor, cmd, buffer, 12, 1, SCSI_DATA_READ); if (rc != 0) break; if ((buffer[0] << 8) + buffer[1] < 0x0a) { printk(KERN_INFO "sr%d: Hmm, seems the drive " "doesn't support multisession CD's\n", minor); 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; memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = 0xde; cmd[1] = (scsi_CDs[minor].device->lun << 5) | 0x03; cmd[2] = 0xb0; rc = sr_do_ioctl(minor, cmd, buffer, 0x16, 1, SCSI_DATA_READ); if (rc != 0) break; if (buffer[14] != 0 && buffer[14] != 0xb0) { printk(KERN_INFO "sr%d: Hmm, seems the cdrom " "doesn't support multisession CD's\n", minor); no_multi = 1; break; } min = BCD_TO_BIN(buffer[15]); sec = BCD_TO_BIN(buffer[16]); frame = BCD_TO_BIN(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 ?) */ memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = 0xc7; cmd[1] = (scsi_CDs[minor].device->lun << 5) | 3; rc = sr_do_ioctl(minor, cmd, buffer, 4, 1, SCSI_DATA_READ); if (rc == -EINVAL) { printk(KERN_INFO "sr%d: Hmm, seems the drive " "doesn't support multisession CD's\n", minor); no_multi = 1; break; } if (rc != 0) break; min = BCD_TO_BIN(buffer[1]); sec = BCD_TO_BIN(buffer[2]); frame = BCD_TO_BIN(buffer[3]); sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame; if (sector) sector -= CD_MSF_OFFSET; sr_set_blocklength(minor, 2048); break; } case VENDOR_WRITER: memset(cmd, 0, MAX_COMMAND_SIZE); cmd[0] = READ_TOC; cmd[1] = (scsi_CDs[minor].device->lun << 5); cmd[8] = 0x04; cmd[9] = 0x40; rc = sr_do_ioctl(minor, cmd, buffer, 0x04, 1, SCSI_DATA_READ); if (rc != 0) { break; } if ((rc = buffer[2]) == 0) { printk(KERN_WARNING "sr%d: No finished session\n", minor); break; } cmd[0] = READ_TOC; /* Read TOC */ cmd[1] = (scsi_CDs[minor].device->lun << 5); cmd[6] = rc & 0x7f; /* number of last session */ cmd[8] = 0x0c; cmd[9] = 0x40; rc = sr_do_ioctl(minor, cmd, buffer, 12, 1, SCSI_DATA_READ); 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 "sr%d: unknown vendor code (%i), not initialized ?\n", minor, VENDOR_ID); sector = 0; no_multi = 1; break; } scsi_CDs[minor].ms_offset = sector; scsi_CDs[minor].xa_flag = 0; if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(minor)) scsi_CDs[minor].xa_flag = 1; if (2048 != scsi_CDs[minor].device->sector_size) { sr_set_blocklength(minor, 2048); } if (no_multi) cdi->mask |= CDC_MULTI_SESSION; #ifdef DEBUG if (sector) printk(KERN_DEBUG "sr%d: multisession offset=%lu\n", minor, sector); #endif scsi_free(buffer, 512); return rc; }