1 /* -*-linux-c-*- 2 3 * vendor-specific code for SCSI CD-ROM's goes here. 4 * 5 * This is needed becauce most of the new features (multisession and 6 * the like) are too new to be included into the SCSI-II standard (to 7 * be exact: there is'nt anything in my draft copy). 8 * 9 * Aug 1997: Ha! Got a SCSI-3 cdrom spec across my fingers. SCSI-3 does 10 * multisession using the READ TOC command (like SONY). 11 * 12 * Rearranged stuff here: SCSI-3 is included allways, support 13 * for NEC/TOSHIBA/HP commands is optional. 14 * 15 * Gerd Knorr <kraxel@cs.tu-berlin.de> 16 * 17 * -------------------------------------------------------------------------- 18 * 19 * support for XA/multisession-CD's 20 * 21 * - NEC: Detection and support of multisession CD's. 22 * 23 * - TOSHIBA: Detection and support of multisession CD's. 24 * Some XA-Sector tweaking, required for older drives. 25 * 26 * - SONY: Detection and support of multisession CD's. 27 * added by Thomas Quinot <thomas@cuivre.freenix.fr> 28 * 29 * - PIONEER, HITACHI, PLEXTOR, MATSHITA, TEAC, PHILIPS: known to 30 * work with SONY (SCSI3 now) code. 31 * 32 * - HP: Much like SONY, but a little different... (Thomas) 33 * HP-Writers only ??? Maybe other CD-Writers work with this too ? 34 * HP 6020 writers now supported. 35 */ 36 37 #include <linux/cdrom.h> 38 #include <linux/errno.h> 39 #include <linux/string.h> 40 #include <linux/bcd.h> 41 #include <linux/blkdev.h> 42 #include <linux/slab.h> 43 44 #include <scsi/scsi.h> 45 #include <scsi/scsi_cmnd.h> 46 #include <scsi/scsi_device.h> 47 #include <scsi/scsi_host.h> 48 #include <scsi/scsi_ioctl.h> 49 50 #include "sr.h" 51 52 #if 0 53 #define DEBUG 54 #endif 55 56 /* here are some constants to sort the vendors into groups */ 57 58 #define VENDOR_SCSI3 1 /* default: scsi-3 mmc */ 59 60 #define VENDOR_NEC 2 61 #define VENDOR_TOSHIBA 3 62 #define VENDOR_WRITER 4 /* pre-scsi3 writers */ 63 64 #define VENDOR_TIMEOUT 30*HZ 65 66 void sr_vendor_init(Scsi_CD *cd) 67 { 68 #ifndef CONFIG_BLK_DEV_SR_VENDOR 69 cd->vendor = VENDOR_SCSI3; 70 #else 71 const char *vendor = cd->device->vendor; 72 const char *model = cd->device->model; 73 74 /* default */ 75 cd->vendor = VENDOR_SCSI3; 76 if (cd->readcd_known) 77 /* this is true for scsi3/mmc drives - no more checks */ 78 return; 79 80 if (cd->device->type == TYPE_WORM) { 81 cd->vendor = VENDOR_WRITER; 82 83 } else if (!strncmp(vendor, "NEC", 3)) { 84 cd->vendor = VENDOR_NEC; 85 if (!strncmp(model, "CD-ROM DRIVE:25", 15) || 86 !strncmp(model, "CD-ROM DRIVE:36", 15) || 87 !strncmp(model, "CD-ROM DRIVE:83", 15) || 88 !strncmp(model, "CD-ROM DRIVE:84 ", 16) 89 #if 0 90 /* my NEC 3x returns the read-raw data if a read-raw 91 is followed by a read for the same sector - aeb */ 92 || !strncmp(model, "CD-ROM DRIVE:500", 16) 93 #endif 94 ) 95 /* these can't handle multisession, may hang */ 96 cd->cdi.mask |= CDC_MULTI_SESSION; 97 98 } else if (!strncmp(vendor, "TOSHIBA", 7)) { 99 cd->vendor = VENDOR_TOSHIBA; 100 101 } 102 #endif 103 } 104 105 106 /* small handy function for switching block length using MODE SELECT, 107 * used by sr_read_sector() */ 108 109 int sr_set_blocklength(Scsi_CD *cd, int blocklength) 110 { 111 unsigned char *buffer; /* the buffer for the ioctl */ 112 struct packet_command cgc; 113 struct ccs_modesel_head *modesel; 114 int rc, density = 0; 115 116 #ifdef CONFIG_BLK_DEV_SR_VENDOR 117 if (cd->vendor == VENDOR_TOSHIBA) 118 density = (blocklength > 2048) ? 0x81 : 0x83; 119 #endif 120 121 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); 122 if (!buffer) 123 return -ENOMEM; 124 125 #ifdef DEBUG 126 printk("%s: MODE SELECT 0x%x/%d\n", cd->cdi.name, density, blocklength); 127 #endif 128 memset(&cgc, 0, sizeof(struct packet_command)); 129 cgc.cmd[0] = MODE_SELECT; 130 cgc.cmd[1] = (1 << 4); 131 cgc.cmd[4] = 12; 132 modesel = (struct ccs_modesel_head *) buffer; 133 memset(modesel, 0, sizeof(*modesel)); 134 modesel->block_desc_length = 0x08; 135 modesel->density = density; 136 modesel->block_length_med = (blocklength >> 8) & 0xff; 137 modesel->block_length_lo = blocklength & 0xff; 138 cgc.buffer = buffer; 139 cgc.buflen = sizeof(*modesel); 140 cgc.data_direction = DMA_TO_DEVICE; 141 cgc.timeout = VENDOR_TIMEOUT; 142 if (0 == (rc = sr_do_ioctl(cd, &cgc))) { 143 cd->device->sector_size = blocklength; 144 } 145 #ifdef DEBUG 146 else 147 printk("%s: switching blocklength to %d bytes failed\n", 148 cd->cdi.name, blocklength); 149 #endif 150 kfree(buffer); 151 return rc; 152 } 153 154 /* This function gets called after a media change. Checks if the CD is 155 multisession, asks for offset etc. */ 156 157 int sr_cd_check(struct cdrom_device_info *cdi) 158 { 159 Scsi_CD *cd = cdi->handle; 160 unsigned long sector; 161 unsigned char *buffer; /* the buffer for the ioctl */ 162 struct packet_command cgc; 163 int rc, no_multi; 164 165 if (cd->cdi.mask & CDC_MULTI_SESSION) 166 return 0; 167 168 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); 169 if (!buffer) 170 return -ENOMEM; 171 172 sector = 0; /* the multisession sector offset goes here */ 173 no_multi = 0; /* flag: the drive can't handle multisession */ 174 rc = 0; 175 176 memset(&cgc, 0, sizeof(struct packet_command)); 177 178 switch (cd->vendor) { 179 180 case VENDOR_SCSI3: 181 cgc.cmd[0] = READ_TOC; 182 cgc.cmd[8] = 12; 183 cgc.cmd[9] = 0x40; 184 cgc.buffer = buffer; 185 cgc.buflen = 12; 186 cgc.quiet = 1; 187 cgc.data_direction = DMA_FROM_DEVICE; 188 cgc.timeout = VENDOR_TIMEOUT; 189 rc = sr_do_ioctl(cd, &cgc); 190 if (rc != 0) 191 break; 192 if ((buffer[0] << 8) + buffer[1] < 0x0a) { 193 printk(KERN_INFO "%s: Hmm, seems the drive " 194 "doesn't support multisession CD's\n", cd->cdi.name); 195 no_multi = 1; 196 break; 197 } 198 sector = buffer[11] + (buffer[10] << 8) + 199 (buffer[9] << 16) + (buffer[8] << 24); 200 if (buffer[6] <= 1) { 201 /* ignore sector offsets from first track */ 202 sector = 0; 203 } 204 break; 205 206 #ifdef CONFIG_BLK_DEV_SR_VENDOR 207 case VENDOR_NEC:{ 208 unsigned long min, sec, frame; 209 cgc.cmd[0] = 0xde; 210 cgc.cmd[1] = 0x03; 211 cgc.cmd[2] = 0xb0; 212 cgc.buffer = buffer; 213 cgc.buflen = 0x16; 214 cgc.quiet = 1; 215 cgc.data_direction = DMA_FROM_DEVICE; 216 cgc.timeout = VENDOR_TIMEOUT; 217 rc = sr_do_ioctl(cd, &cgc); 218 if (rc != 0) 219 break; 220 if (buffer[14] != 0 && buffer[14] != 0xb0) { 221 printk(KERN_INFO "%s: Hmm, seems the cdrom " 222 "doesn't support multisession CD's\n", 223 cd->cdi.name); 224 no_multi = 1; 225 break; 226 } 227 min = bcd2bin(buffer[15]); 228 sec = bcd2bin(buffer[16]); 229 frame = bcd2bin(buffer[17]); 230 sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame; 231 break; 232 } 233 234 case VENDOR_TOSHIBA:{ 235 unsigned long min, sec, frame; 236 237 /* we request some disc information (is it a XA-CD ?, 238 * where starts the last session ?) */ 239 cgc.cmd[0] = 0xc7; 240 cgc.cmd[1] = 0x03; 241 cgc.buffer = buffer; 242 cgc.buflen = 4; 243 cgc.quiet = 1; 244 cgc.data_direction = DMA_FROM_DEVICE; 245 cgc.timeout = VENDOR_TIMEOUT; 246 rc = sr_do_ioctl(cd, &cgc); 247 if (rc == -EINVAL) { 248 printk(KERN_INFO "%s: Hmm, seems the drive " 249 "doesn't support multisession CD's\n", 250 cd->cdi.name); 251 no_multi = 1; 252 break; 253 } 254 if (rc != 0) 255 break; 256 min = bcd2bin(buffer[1]); 257 sec = bcd2bin(buffer[2]); 258 frame = bcd2bin(buffer[3]); 259 sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame; 260 if (sector) 261 sector -= CD_MSF_OFFSET; 262 sr_set_blocklength(cd, 2048); 263 break; 264 } 265 266 case VENDOR_WRITER: 267 cgc.cmd[0] = READ_TOC; 268 cgc.cmd[8] = 0x04; 269 cgc.cmd[9] = 0x40; 270 cgc.buffer = buffer; 271 cgc.buflen = 0x04; 272 cgc.quiet = 1; 273 cgc.data_direction = DMA_FROM_DEVICE; 274 cgc.timeout = VENDOR_TIMEOUT; 275 rc = sr_do_ioctl(cd, &cgc); 276 if (rc != 0) { 277 break; 278 } 279 if ((rc = buffer[2]) == 0) { 280 printk(KERN_WARNING 281 "%s: No finished session\n", cd->cdi.name); 282 break; 283 } 284 cgc.cmd[0] = READ_TOC; /* Read TOC */ 285 cgc.cmd[6] = rc & 0x7f; /* number of last session */ 286 cgc.cmd[8] = 0x0c; 287 cgc.cmd[9] = 0x40; 288 cgc.buffer = buffer; 289 cgc.buflen = 12; 290 cgc.quiet = 1; 291 cgc.data_direction = DMA_FROM_DEVICE; 292 cgc.timeout = VENDOR_TIMEOUT; 293 rc = sr_do_ioctl(cd, &cgc); 294 if (rc != 0) { 295 break; 296 } 297 sector = buffer[11] + (buffer[10] << 8) + 298 (buffer[9] << 16) + (buffer[8] << 24); 299 break; 300 #endif /* CONFIG_BLK_DEV_SR_VENDOR */ 301 302 default: 303 /* should not happen */ 304 printk(KERN_WARNING 305 "%s: unknown vendor code (%i), not initialized ?\n", 306 cd->cdi.name, cd->vendor); 307 sector = 0; 308 no_multi = 1; 309 break; 310 } 311 cd->ms_offset = sector; 312 cd->xa_flag = 0; 313 if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(cd)) 314 cd->xa_flag = 1; 315 316 if (2048 != cd->device->sector_size) { 317 sr_set_blocklength(cd, 2048); 318 } 319 if (no_multi) 320 cdi->mask |= CDC_MULTI_SESSION; 321 322 #ifdef DEBUG 323 if (sector) 324 printk(KERN_DEBUG "%s: multisession offset=%lu\n", 325 cd->cdi.name, sector); 326 #endif 327 kfree(buffer); 328 return rc; 329 } 330