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