1 // SPDX-License-Identifier: GPL-2.0 2 /* -*-linux-c-*- 3 4 * vendor-specific code for SCSI CD-ROM's goes here. 5 * 6 * This is needed becauce most of the new features (multisession and 7 * the like) are too new to be included into the SCSI-II standard (to 8 * be exact: there is'nt anything in my draft copy). 9 * 10 * Aug 1997: Ha! Got a SCSI-3 cdrom spec across my fingers. SCSI-3 does 11 * multisession using the READ TOC command (like SONY). 12 * 13 * Rearranged stuff here: SCSI-3 is included allways, support 14 * for NEC/TOSHIBA/HP commands is optional. 15 * 16 * Gerd Knorr <kraxel@cs.tu-berlin.de> 17 * 18 * -------------------------------------------------------------------------- 19 * 20 * support for XA/multisession-CD's 21 * 22 * - NEC: Detection and support of multisession CD's. 23 * 24 * - TOSHIBA: Detection and support of multisession CD's. 25 * Some XA-Sector tweaking, required for older drives. 26 * 27 * - SONY: Detection and support of multisession CD's. 28 * added by Thomas Quinot <thomas@cuivre.freenix.fr> 29 * 30 * - PIONEER, HITACHI, PLEXTOR, MATSHITA, TEAC, PHILIPS: known to 31 * work with SONY (SCSI3 now) code. 32 * 33 * - HP: Much like SONY, but a little different... (Thomas) 34 * HP-Writers only ??? Maybe other CD-Writers work with this too ? 35 * HP 6020 writers now supported. 36 */ 37 38 #include <linux/cdrom.h> 39 #include <linux/errno.h> 40 #include <linux/string.h> 41 #include <linux/bcd.h> 42 #include <linux/blkdev.h> 43 #include <linux/slab.h> 44 45 #include <scsi/scsi.h> 46 #include <scsi/scsi_cmnd.h> 47 #include <scsi/scsi_device.h> 48 #include <scsi/scsi_host.h> 49 #include <scsi/scsi_ioctl.h> 50 51 #include "sr.h" 52 53 #if 0 54 #define DEBUG 55 #endif 56 57 /* here are some constants to sort the vendors into groups */ 58 59 #define VENDOR_SCSI3 1 /* default: scsi-3 mmc */ 60 61 #define VENDOR_NEC 2 62 #define VENDOR_TOSHIBA 3 63 #define VENDOR_WRITER 4 /* pre-scsi3 writers */ 64 65 #define VENDOR_TIMEOUT 30*HZ 66 67 void sr_vendor_init(Scsi_CD *cd) 68 { 69 #ifndef CONFIG_BLK_DEV_SR_VENDOR 70 cd->vendor = VENDOR_SCSI3; 71 #else 72 const char *vendor = cd->device->vendor; 73 const char *model = cd->device->model; 74 75 /* default */ 76 cd->vendor = VENDOR_SCSI3; 77 if (cd->readcd_known) 78 /* this is true for scsi3/mmc drives - no more checks */ 79 return; 80 81 if (cd->device->type == TYPE_WORM) { 82 cd->vendor = VENDOR_WRITER; 83 84 } else if (!strncmp(vendor, "NEC", 3)) { 85 cd->vendor = VENDOR_NEC; 86 if (!strncmp(model, "CD-ROM DRIVE:25", 15) || 87 !strncmp(model, "CD-ROM DRIVE:36", 15) || 88 !strncmp(model, "CD-ROM DRIVE:83", 15) || 89 !strncmp(model, "CD-ROM DRIVE:84 ", 16) 90 #if 0 91 /* my NEC 3x returns the read-raw data if a read-raw 92 is followed by a read for the same sector - aeb */ 93 || !strncmp(model, "CD-ROM DRIVE:500", 16) 94 #endif 95 ) 96 /* these can't handle multisession, may hang */ 97 cd->cdi.mask |= CDC_MULTI_SESSION; 98 99 } else if (!strncmp(vendor, "TOSHIBA", 7)) { 100 cd->vendor = VENDOR_TOSHIBA; 101 102 } 103 #endif 104 } 105 106 107 /* small handy function for switching block length using MODE SELECT, 108 * used by sr_read_sector() */ 109 110 int sr_set_blocklength(Scsi_CD *cd, int blocklength) 111 { 112 unsigned char *buffer; /* the buffer for the ioctl */ 113 struct packet_command cgc; 114 struct ccs_modesel_head *modesel; 115 int rc, density = 0; 116 117 #ifdef CONFIG_BLK_DEV_SR_VENDOR 118 if (cd->vendor == VENDOR_TOSHIBA) 119 density = (blocklength > 2048) ? 0x81 : 0x83; 120 #endif 121 122 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); 123 if (!buffer) 124 return -ENOMEM; 125 126 #ifdef DEBUG 127 sr_printk(KERN_INFO, cd, "MODE SELECT 0x%x/%d\n", density, blocklength); 128 #endif 129 memset(&cgc, 0, sizeof(struct packet_command)); 130 cgc.cmd[0] = MODE_SELECT; 131 cgc.cmd[1] = (1 << 4); 132 cgc.cmd[4] = 12; 133 modesel = (struct ccs_modesel_head *) buffer; 134 memset(modesel, 0, sizeof(*modesel)); 135 modesel->block_desc_length = 0x08; 136 modesel->density = density; 137 modesel->block_length_med = (blocklength >> 8) & 0xff; 138 modesel->block_length_lo = blocklength & 0xff; 139 cgc.buffer = buffer; 140 cgc.buflen = sizeof(*modesel); 141 cgc.data_direction = DMA_TO_DEVICE; 142 cgc.timeout = VENDOR_TIMEOUT; 143 if (0 == (rc = sr_do_ioctl(cd, &cgc))) { 144 cd->device->sector_size = blocklength; 145 } 146 #ifdef DEBUG 147 else 148 sr_printk(KERN_INFO, cd, 149 "switching blocklength to %d bytes failed\n", 150 blocklength); 151 #endif 152 kfree(buffer); 153 return rc; 154 } 155 156 /* This function gets called after a media change. Checks if the CD is 157 multisession, asks for offset etc. */ 158 159 int sr_cd_check(struct cdrom_device_info *cdi) 160 { 161 Scsi_CD *cd = cdi->handle; 162 unsigned long sector; 163 unsigned char *buffer; /* the buffer for the ioctl */ 164 struct packet_command cgc; 165 int rc, no_multi; 166 167 if (cd->cdi.mask & CDC_MULTI_SESSION) 168 return 0; 169 170 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); 171 if (!buffer) 172 return -ENOMEM; 173 174 sector = 0; /* the multisession sector offset goes here */ 175 no_multi = 0; /* flag: the drive can't handle multisession */ 176 rc = 0; 177 178 memset(&cgc, 0, sizeof(struct packet_command)); 179 180 switch (cd->vendor) { 181 182 case VENDOR_SCSI3: 183 cgc.cmd[0] = READ_TOC; 184 cgc.cmd[8] = 12; 185 cgc.cmd[9] = 0x40; 186 cgc.buffer = buffer; 187 cgc.buflen = 12; 188 cgc.quiet = 1; 189 cgc.data_direction = DMA_FROM_DEVICE; 190 cgc.timeout = VENDOR_TIMEOUT; 191 rc = sr_do_ioctl(cd, &cgc); 192 if (rc != 0) 193 break; 194 if ((buffer[0] << 8) + buffer[1] < 0x0a) { 195 sr_printk(KERN_INFO, cd, "Hmm, seems the drive " 196 "doesn't support multisession CD's\n"); 197 no_multi = 1; 198 break; 199 } 200 sector = buffer[11] + (buffer[10] << 8) + 201 (buffer[9] << 16) + (buffer[8] << 24); 202 if (buffer[6] <= 1) { 203 /* ignore sector offsets from first track */ 204 sector = 0; 205 } 206 break; 207 208 #ifdef CONFIG_BLK_DEV_SR_VENDOR 209 case VENDOR_NEC:{ 210 unsigned long min, sec, frame; 211 cgc.cmd[0] = 0xde; 212 cgc.cmd[1] = 0x03; 213 cgc.cmd[2] = 0xb0; 214 cgc.buffer = buffer; 215 cgc.buflen = 0x16; 216 cgc.quiet = 1; 217 cgc.data_direction = DMA_FROM_DEVICE; 218 cgc.timeout = VENDOR_TIMEOUT; 219 rc = sr_do_ioctl(cd, &cgc); 220 if (rc != 0) 221 break; 222 if (buffer[14] != 0 && buffer[14] != 0xb0) { 223 sr_printk(KERN_INFO, cd, "Hmm, seems the cdrom " 224 "doesn't support multisession CD's\n"); 225 226 no_multi = 1; 227 break; 228 } 229 min = bcd2bin(buffer[15]); 230 sec = bcd2bin(buffer[16]); 231 frame = bcd2bin(buffer[17]); 232 sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame; 233 break; 234 } 235 236 case VENDOR_TOSHIBA:{ 237 unsigned long min, sec, frame; 238 239 /* we request some disc information (is it a XA-CD ?, 240 * where starts the last session ?) */ 241 cgc.cmd[0] = 0xc7; 242 cgc.cmd[1] = 0x03; 243 cgc.buffer = buffer; 244 cgc.buflen = 4; 245 cgc.quiet = 1; 246 cgc.data_direction = DMA_FROM_DEVICE; 247 cgc.timeout = VENDOR_TIMEOUT; 248 rc = sr_do_ioctl(cd, &cgc); 249 if (rc == -EINVAL) { 250 sr_printk(KERN_INFO, cd, "Hmm, seems the drive " 251 "doesn't support multisession CD's\n"); 252 no_multi = 1; 253 break; 254 } 255 if (rc != 0) 256 break; 257 min = bcd2bin(buffer[1]); 258 sec = bcd2bin(buffer[2]); 259 frame = bcd2bin(buffer[3]); 260 sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame; 261 if (sector) 262 sector -= CD_MSF_OFFSET; 263 sr_set_blocklength(cd, 2048); 264 break; 265 } 266 267 case VENDOR_WRITER: 268 cgc.cmd[0] = READ_TOC; 269 cgc.cmd[8] = 0x04; 270 cgc.cmd[9] = 0x40; 271 cgc.buffer = buffer; 272 cgc.buflen = 0x04; 273 cgc.quiet = 1; 274 cgc.data_direction = DMA_FROM_DEVICE; 275 cgc.timeout = VENDOR_TIMEOUT; 276 rc = sr_do_ioctl(cd, &cgc); 277 if (rc != 0) { 278 break; 279 } 280 if ((rc = buffer[2]) == 0) { 281 sr_printk(KERN_WARNING, cd, 282 "No finished session\n"); 283 break; 284 } 285 cgc.cmd[0] = READ_TOC; /* Read TOC */ 286 cgc.cmd[6] = rc & 0x7f; /* number of last session */ 287 cgc.cmd[8] = 0x0c; 288 cgc.cmd[9] = 0x40; 289 cgc.buffer = buffer; 290 cgc.buflen = 12; 291 cgc.quiet = 1; 292 cgc.data_direction = DMA_FROM_DEVICE; 293 cgc.timeout = VENDOR_TIMEOUT; 294 rc = sr_do_ioctl(cd, &cgc); 295 if (rc != 0) { 296 break; 297 } 298 sector = buffer[11] + (buffer[10] << 8) + 299 (buffer[9] << 16) + (buffer[8] << 24); 300 break; 301 #endif /* CONFIG_BLK_DEV_SR_VENDOR */ 302 303 default: 304 /* should not happen */ 305 sr_printk(KERN_WARNING, cd, 306 "unknown vendor code (%i), not initialized ?\n", 307 cd->vendor); 308 sector = 0; 309 no_multi = 1; 310 break; 311 } 312 cd->ms_offset = sector; 313 cd->xa_flag = 0; 314 if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(cd)) 315 cd->xa_flag = 1; 316 317 if (2048 != cd->device->sector_size) { 318 sr_set_blocklength(cd, 2048); 319 } 320 if (no_multi) 321 cdi->mask |= CDC_MULTI_SESSION; 322 323 #ifdef DEBUG 324 if (sector) 325 sr_printk(KERN_DEBUG, cd, "multisession offset=%lu\n", 326 sector); 327 #endif 328 kfree(buffer); 329 return rc; 330 } 331