drivers/scsi/sr_vendor.c

   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 #define VENDOR_CYGNAL_85ED     5        /* CD-on-a-chip */
  65
  66 #define VENDOR_TIMEOUT  30*HZ
  67
  68 void sr_vendor_init(Scsi_CD *cd)
  69 {
  70 #ifndef CONFIG_BLK_DEV_SR_VENDOR
  71         cd->vendor = VENDOR_SCSI3;
  72 #else
  73         const char *vendor = cd->device->vendor;
  74         const char *model = cd->device->model;
  75
  76         /* default */
  77         cd->vendor = VENDOR_SCSI3;
  78         if (cd->readcd_known)
  79                 /* this is true for scsi3/mmc drives - no more checks */
  80                 return;
  81
  82         if (cd->device->type == TYPE_WORM) {
  83                 cd->vendor = VENDOR_WRITER;
  84
  85         } else if (!strncmp(vendor, "NEC", 3)) {
  86                 cd->vendor = VENDOR_NEC;
  87                 if (!strncmp(model, "CD-ROM DRIVE:25", 15) ||
  88                     !strncmp(model, "CD-ROM DRIVE:36", 15) ||
  89                     !strncmp(model, "CD-ROM DRIVE:83", 15) ||
  90                     !strncmp(model, "CD-ROM DRIVE:84 ", 16)
  91 #if 0
  92                 /* my NEC 3x returns the read-raw data if a read-raw
  93                    is followed by a read for the same sector - aeb */
  94                     || !strncmp(model, "CD-ROM DRIVE:500", 16)
  95 #endif
  96                     )
  97                         /* these can't handle multisession, may hang */
  98                         cd->cdi.mask |= CDC_MULTI_SESSION;
  99
 100         } else if (!strncmp(vendor, "TOSHIBA", 7)) {
 101                 cd->vendor = VENDOR_TOSHIBA;
 102
 103         } else if (!strncmp(vendor, "Beurer", 6) &&
 104                    !strncmp(model, "Gluco Memory", 12)) {
 105                 /* The Beurer GL50 evo uses a Cygnal-manufactured CD-on-a-chip
 106                    that only accepts a subset of SCSI commands.  Most of the
 107                    not-implemented commands are fine to fail, but a few,
 108                    particularly around the MMC or Audio commands, will put the
 109                    device into an unrecoverable state, so they need to be
 110                    avoided at all costs.
 111                 */
 112                 cd->vendor = VENDOR_CYGNAL_85ED;
 113                 cd->cdi.mask |= (
 114                         CDC_MULTI_SESSION |
 115                         CDC_CLOSE_TRAY | CDC_OPEN_TRAY |
 116                         CDC_LOCK |
 117                         CDC_GENERIC_PACKET |
 118                         CDC_PLAY_AUDIO
 119                         );
 120         }
 121 #endif
 122 }
 123
 124
 125 /* small handy function for switching block length using MODE SELECT,
 126  * used by sr_read_sector() */
 127
 128 int sr_set_blocklength(Scsi_CD *cd, int blocklength)
 129 {
 130         unsigned char *buffer;  /* the buffer for the ioctl */
 131         struct packet_command cgc;
 132         struct ccs_modesel_head *modesel;
 133         int rc, density = 0;
 134
 135 #ifdef CONFIG_BLK_DEV_SR_VENDOR
 136         if (cd->vendor == VENDOR_TOSHIBA)
 137                 density = (blocklength > 2048) ? 0x81 : 0x83;
 138 #endif
 139
 140         buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
 141         if (!buffer)
 142                 return -ENOMEM;
 143
 144 #ifdef DEBUG
 145         sr_printk(KERN_INFO, cd, "MODE SELECT 0x%x/%d\n", density, blocklength);
 146 #endif
 147         memset(&cgc, 0, sizeof(struct packet_command));
 148         cgc.cmd[0] = MODE_SELECT;
 149         cgc.cmd[1] = (1 << 4);
 150         cgc.cmd[4] = 12;
 151         modesel = (struct ccs_modesel_head *) buffer;
 152         memset(modesel, 0, sizeof(*modesel));
 153         modesel->block_desc_length = 0x08;
 154         modesel->density = density;
 155         modesel->block_length_med = (blocklength >> 8) & 0xff;
 156         modesel->block_length_lo = blocklength & 0xff;
 157         cgc.buffer = buffer;
 158         cgc.buflen = sizeof(*modesel);
 159         cgc.data_direction = DMA_TO_DEVICE;
 160         cgc.timeout = VENDOR_TIMEOUT;
 161         if (0 == (rc = sr_do_ioctl(cd, &cgc))) {
 162                 cd->device->sector_size = blocklength;
 163         }
 164 #ifdef DEBUG
 165         else
 166                 sr_printk(KERN_INFO, cd,
 167                           "switching blocklength to %d bytes failed\n",
 168                           blocklength);
 169 #endif
 170         kfree(buffer);
 171         return rc;
 172 }
 173
 174 /* This function gets called after a media change. Checks if the CD is
 175    multisession, asks for offset etc. */
 176
 177 int sr_cd_check(struct cdrom_device_info *cdi)
 178 {
 179         Scsi_CD *cd = cdi->handle;
 180         unsigned long sector;
 181         unsigned char *buffer;  /* the buffer for the ioctl */
 182         struct packet_command cgc;
 183         int rc, no_multi;
 184
 185         if (cd->cdi.mask & CDC_MULTI_SESSION)
 186                 return 0;
 187
 188         buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
 189         if (!buffer)
 190                 return -ENOMEM;
 191
 192         sector = 0;             /* the multisession sector offset goes here  */
 193         no_multi = 0;           /* flag: the drive can't handle multisession */
 194         rc = 0;
 195
 196         memset(&cgc, 0, sizeof(struct packet_command));
 197
 198         switch (cd->vendor) {
 199
 200         case VENDOR_SCSI3:
 201                 cgc.cmd[0] = READ_TOC;
 202                 cgc.cmd[8] = 12;
 203                 cgc.cmd[9] = 0x40;
 204                 cgc.buffer = buffer;
 205                 cgc.buflen = 12;
 206                 cgc.quiet = 1;
 207                 cgc.data_direction = DMA_FROM_DEVICE;
 208                 cgc.timeout = VENDOR_TIMEOUT;
 209                 rc = sr_do_ioctl(cd, &cgc);
 210                 if (rc != 0)
 211                         break;
 212                 if ((buffer[0] << 8) + buffer[1] < 0x0a) {
 213                         sr_printk(KERN_INFO, cd, "Hmm, seems the drive "
 214                            "doesn't support multisession CD's\n");
 215                         no_multi = 1;
 216                         break;
 217                 }
 218                 sector = buffer[11] + (buffer[10] << 8) +
 219                     (buffer[9] << 16) + (buffer[8] << 24);
 220                 if (buffer[6] <= 1) {
 221                         /* ignore sector offsets from first track */
 222                         sector = 0;
 223                 }
 224                 break;
 225
 226 #ifdef CONFIG_BLK_DEV_SR_VENDOR
 227         case VENDOR_NEC:{
 228                         unsigned long min, sec, frame;
 229                         cgc.cmd[0] = 0xde;
 230                         cgc.cmd[1] = 0x03;
 231                         cgc.cmd[2] = 0xb0;
 232                         cgc.buffer = buffer;
 233                         cgc.buflen = 0x16;
 234                         cgc.quiet = 1;
 235                         cgc.data_direction = DMA_FROM_DEVICE;
 236                         cgc.timeout = VENDOR_TIMEOUT;
 237                         rc = sr_do_ioctl(cd, &cgc);
 238                         if (rc != 0)
 239                                 break;
 240                         if (buffer[14] != 0 && buffer[14] != 0xb0) {
 241                                 sr_printk(KERN_INFO, cd, "Hmm, seems the cdrom "
 242                                           "doesn't support multisession CD's\n");
 243
 244                                 no_multi = 1;
 245                                 break;
 246                         }
 247                         min = bcd2bin(buffer[15]);
 248                         sec = bcd2bin(buffer[16]);
 249                         frame = bcd2bin(buffer[17]);
 250                         sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
 251                         break;
 252                 }
 253
 254         case VENDOR_TOSHIBA:{
 255                         unsigned long min, sec, frame;
 256
 257                         /* we request some disc information (is it a XA-CD ?,
 258                          * where starts the last session ?) */
 259                         cgc.cmd[0] = 0xc7;
 260                         cgc.cmd[1] = 0x03;
 261                         cgc.buffer = buffer;
 262                         cgc.buflen = 4;
 263                         cgc.quiet = 1;
 264                         cgc.data_direction = DMA_FROM_DEVICE;
 265                         cgc.timeout = VENDOR_TIMEOUT;
 266                         rc = sr_do_ioctl(cd, &cgc);
 267                         if (rc == -EINVAL) {
 268                                 sr_printk(KERN_INFO, cd, "Hmm, seems the drive "
 269                                           "doesn't support multisession CD's\n");
 270                                 no_multi = 1;
 271                                 break;
 272                         }
 273                         if (rc != 0)
 274                                 break;
 275                         min = bcd2bin(buffer[1]);
 276                         sec = bcd2bin(buffer[2]);
 277                         frame = bcd2bin(buffer[3]);
 278                         sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
 279                         if (sector)
 280                                 sector -= CD_MSF_OFFSET;
 281                         sr_set_blocklength(cd, 2048);
 282                         break;
 283                 }
 284
 285         case VENDOR_WRITER:
 286                 cgc.cmd[0] = READ_TOC;
 287                 cgc.cmd[8] = 0x04;
 288                 cgc.cmd[9] = 0x40;
 289                 cgc.buffer = buffer;
 290                 cgc.buflen = 0x04;
 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                 if ((rc = buffer[2]) == 0) {
 299                         sr_printk(KERN_WARNING, cd,
 300                                   "No finished session\n");
 301                         break;
 302                 }
 303                 cgc.cmd[0] = READ_TOC;  /* Read TOC */
 304                 cgc.cmd[6] = rc & 0x7f; /* number of last session */
 305                 cgc.cmd[8] = 0x0c;
 306                 cgc.cmd[9] = 0x40;
 307                 cgc.buffer = buffer;
 308                 cgc.buflen = 12;
 309                 cgc.quiet = 1;
 310                 cgc.data_direction = DMA_FROM_DEVICE;
 311                 cgc.timeout = VENDOR_TIMEOUT;
 312                 rc = sr_do_ioctl(cd, &cgc);
 313                 if (rc != 0) {
 314                         break;
 315                 }
 316                 sector = buffer[11] + (buffer[10] << 8) +
 317                     (buffer[9] << 16) + (buffer[8] << 24);
 318                 break;
 319 #endif                          /* CONFIG_BLK_DEV_SR_VENDOR */
 320
 321         default:
 322                 /* should not happen */
 323                 sr_printk(KERN_WARNING, cd,
 324                           "unknown vendor code (%i), not initialized ?\n",
 325                           cd->vendor);
 326                 sector = 0;
 327                 no_multi = 1;
 328                 break;
 329         }
 330         cd->ms_offset = sector;
 331         cd->xa_flag = 0;
 332         if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(cd))
 333                 cd->xa_flag = 1;
 334
 335         if (2048 != cd->device->sector_size) {
 336                 sr_set_blocklength(cd, 2048);
 337         }
 338         if (no_multi)
 339                 cdi->mask |= CDC_MULTI_SESSION;
 340
 341 #ifdef DEBUG
 342         if (sector)
 343                 sr_printk(KERN_DEBUG, cd, "multisession offset=%lu\n",
 344                           sector);
 345 #endif
 346         kfree(buffer);
 347         return rc;
 348 }