/* -*-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 to 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 #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_HP_4020 4 /* HP 4xxx writers, others too ?? */ #define VENDOR_HP_6020 5 /* HP 6020 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 ((!strncmp(vendor,"HP",2) || !strncmp(vendor,"PHILIPS",7)) && scsi_CDs[minor].device->type == TYPE_WORM) { if (!strncmp(model,"CD-Writer 6020",14)) VENDOR_ID = VENDOR_HP_6020; else VENDOR_ID = VENDOR_HP_4020; } 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)) /* 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[12]; /* 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,0,12); 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_CDs[minor].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,min,sec,frame; unsigned char *buffer; /* the buffer for the ioctl */ unsigned char cmd[12]; /* the scsi-command */ int rc,is_xa,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 */ is_xa = 0; /* flag: the CD uses XA-Sectors */ no_multi = 0; /* flag: the drive can't handle multisession */ rc = 0; switch(VENDOR_ID) { case VENDOR_SCSI3: memset(cmd,0,12); 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, 0); 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: memset(cmd,0,12); cmd[0] = 0xde; cmd[1] = (scsi_CDs[minor].device->lun << 5) | 0x03; cmd[2] = 0xb0; rc = sr_do_ioctl(minor, cmd, buffer, 0x16, 0); 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: /* we request some disc information (is it a XA-CD ?, * where starts the last session ?) */ memset(cmd,0,12); cmd[0] = 0xc7; cmd[1] = (scsi_CDs[minor].device->lun << 5) | 3; rc = sr_do_ioctl(minor, cmd, buffer, 4, 0); 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_BLOCK_OFFSET; break; case VENDOR_HP_4020: /* Fallthrough */ case VENDOR_HP_6020: cmd[0] = READ_TOC; cmd[1] = (scsi_CDs[minor].device->lun << 5); cmd[8] = (VENDOR_ID == VENDOR_HP_4020) ? 0x04 : 0x0c; cmd[9] = 0x40; rc = sr_do_ioctl(minor, cmd, buffer, (VENDOR_ID == VENDOR_HP_4020) ? 0x04 : 0x0c, 0); if (rc != 0) { break; } if ((rc = buffer[2]) == 0) { printk (KERN_WARNING "sr%d: No finished session\n",minor); break; } if (VENDOR_ID == VENDOR_HP_4020) { 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, 0); 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].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; }