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         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         } else if (!strncmp(vendor, "Beurer", 6) &&
 101                    !strncmp(model, "Gluco Memory", 12)) {
 102                 /* The Beurer GL50 evo uses a Cygnal-manufactured CD-on-a-chip
 103                    that only accepts a subset of SCSI commands.  Most of the
 104                    not-implemented commands are fine to fail, but a few,
 105                    particularly around the MMC or Audio commands, will put the
 106                    device into an unrecoverable state, so they need to be
 107                    avoided at all costs.
 108                 */
 109                 cd->vendor = VENDOR_CYGNAL_85ED;
 110                 cd->cdi.mask |= (
 111                         CDC_MULTI_SESSION |
 112                         CDC_CLOSE_TRAY | CDC_OPEN_TRAY |
 113                         CDC_LOCK |
 114                         CDC_GENERIC_PACKET |
 115                         CDC_PLAY_AUDIO
 116                         );
 117         }
 118 }
 119
 120
 121 /* small handy function for switching block length using MODE SELECT,
 122  * used by sr_read_sector() */
 123
 124 int sr_set_blocklength(Scsi_CD *cd, int blocklength)
 125 {
 126         unsigned char *buffer;  /* the buffer for the ioctl */
 127         struct packet_command cgc;
 128         struct ccs_modesel_head *modesel;
 129         int rc, density = 0;
 130
 131         if (cd->vendor == VENDOR_TOSHIBA)
 132                 density = (blocklength > 2048) ? 0x81 : 0x83;
 133
 134         buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
 135         if (!buffer)
 136                 return -ENOMEM;
 137
 138 #ifdef DEBUG
 139         sr_printk(KERN_INFO, cd, "MODE SELECT 0x%x/%d\n", density, blocklength);
 140 #endif
 141         memset(&cgc, 0, sizeof(struct packet_command));
 142         cgc.cmd[0] = MODE_SELECT;
 143         cgc.cmd[1] = (1 << 4);
 144         cgc.cmd[4] = 12;
 145         modesel = (struct ccs_modesel_head *) buffer;
 146         memset(modesel, 0, sizeof(*modesel));
 147         modesel->block_desc_length = 0x08;
 148         modesel->density = density;
 149         modesel->block_length_med = (blocklength >> 8) & 0xff;
 150         modesel->block_length_lo = blocklength & 0xff;
 151         cgc.buffer = buffer;
 152         cgc.buflen = sizeof(*modesel);
 153         cgc.data_direction = DMA_TO_DEVICE;
 154         cgc.timeout = VENDOR_TIMEOUT;
 155         if (0 == (rc = sr_do_ioctl(cd, &cgc))) {
 156                 cd->device->sector_size = blocklength;
 157         }
 158 #ifdef DEBUG
 159         else
 160                 sr_printk(KERN_INFO, cd,
 161                           "switching blocklength to %d bytes failed\n",
 162                           blocklength);
 163 #endif
 164         kfree(buffer);
 165         return rc;
 166 }
 167
 168 /* This function gets called after a media change. Checks if the CD is
 169    multisession, asks for offset etc. */
 170
 171 int sr_cd_check(struct cdrom_device_info *cdi)
 172 {
 173         Scsi_CD *cd = cdi->handle;
 174         unsigned long sector;
 175         unsigned char *buffer;  /* the buffer for the ioctl */
 176         struct packet_command cgc;
 177         int rc, no_multi;
 178
 179         if (cd->cdi.mask & CDC_MULTI_SESSION)
 180                 return 0;
 181
 182         buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
 183         if (!buffer)
 184                 return -ENOMEM;
 185
 186         sector = 0;             /* the multisession sector offset goes here  */
 187         no_multi = 0;           /* flag: the drive can't handle multisession */
 188         rc = 0;
 189
 190         memset(&cgc, 0, sizeof(struct packet_command));
 191
 192         switch (cd->vendor) {
 193
 194         case VENDOR_SCSI3:
 195                 cgc.cmd[0] = READ_TOC;
 196                 cgc.cmd[8] = 12;
 197                 cgc.cmd[9] = 0x40;
 198                 cgc.buffer = buffer;
 199                 cgc.buflen = 12;
 200                 cgc.quiet = 1;
 201                 cgc.data_direction = DMA_FROM_DEVICE;
 202                 cgc.timeout = VENDOR_TIMEOUT;
 203                 rc = sr_do_ioctl(cd, &cgc);
 204                 if (rc != 0)
 205                         break;
 206                 if ((buffer[0] << 8) + buffer[1] < 0x0a) {
 207                         sr_printk(KERN_INFO, cd, "Hmm, seems the drive "
 208                            "doesn't support multisession CD's\n");
 209                         no_multi = 1;
 210                         break;
 211                 }
 212                 sector = buffer[11] + (buffer[10] << 8) +
 213                     (buffer[9] << 16) + (buffer[8] << 24);
 214                 if (buffer[6] <= 1) {
 215                         /* ignore sector offsets from first track */
 216                         sector = 0;
 217                 }
 218                 break;
 219
 220         case VENDOR_NEC:{
 221                         unsigned long min, sec, frame;
 222                         cgc.cmd[0] = 0xde;
 223                         cgc.cmd[1] = 0x03;
 224                         cgc.cmd[2] = 0xb0;
 225                         cgc.buffer = buffer;
 226                         cgc.buflen = 0x16;
 227                         cgc.quiet = 1;
 228                         cgc.data_direction = DMA_FROM_DEVICE;
 229                         cgc.timeout = VENDOR_TIMEOUT;
 230                         rc = sr_do_ioctl(cd, &cgc);
 231                         if (rc != 0)
 232                                 break;
 233                         if (buffer[14] != 0 && buffer[14] != 0xb0) {
 234                                 sr_printk(KERN_INFO, cd, "Hmm, seems the cdrom "
 235                                           "doesn't support multisession CD's\n");
 236
 237                                 no_multi = 1;
 238                                 break;
 239                         }
 240                         min = bcd2bin(buffer[15]);
 241                         sec = bcd2bin(buffer[16]);
 242                         frame = bcd2bin(buffer[17]);
 243                         sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
 244                         break;
 245                 }
 246
 247         case VENDOR_TOSHIBA:{
 248                         unsigned long min, sec, frame;
 249
 250                         /* we request some disc information (is it a XA-CD ?,
 251                          * where starts the last session ?) */
 252                         cgc.cmd[0] = 0xc7;
 253                         cgc.cmd[1] = 0x03;
 254                         cgc.buffer = buffer;
 255                         cgc.buflen = 4;
 256                         cgc.quiet = 1;
 257                         cgc.data_direction = DMA_FROM_DEVICE;
 258                         cgc.timeout = VENDOR_TIMEOUT;
 259                         rc = sr_do_ioctl(cd, &cgc);
 260                         if (rc == -EINVAL) {
 261                                 sr_printk(KERN_INFO, cd, "Hmm, seems the drive "
 262                                           "doesn't support multisession CD's\n");
 263                                 no_multi = 1;
 264                                 break;
 265                         }
 266                         if (rc != 0)
 267                                 break;
 268                         min = bcd2bin(buffer[1]);
 269                         sec = bcd2bin(buffer[2]);
 270                         frame = bcd2bin(buffer[3]);
 271                         sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
 272                         if (sector)
 273                                 sector -= CD_MSF_OFFSET;
 274                         sr_set_blocklength(cd, 2048);
 275                         break;
 276                 }
 277
 278         case VENDOR_WRITER:
 279                 cgc.cmd[0] = READ_TOC;
 280                 cgc.cmd[8] = 0x04;
 281                 cgc.cmd[9] = 0x40;
 282                 cgc.buffer = buffer;
 283                 cgc.buflen = 0x04;
 284                 cgc.quiet = 1;
 285                 cgc.data_direction = DMA_FROM_DEVICE;
 286                 cgc.timeout = VENDOR_TIMEOUT;
 287                 rc = sr_do_ioctl(cd, &cgc);
 288                 if (rc != 0) {
 289                         break;
 290                 }
 291                 if ((rc = buffer[2]) == 0) {
 292                         sr_printk(KERN_WARNING, cd,
 293                                   "No finished session\n");
 294                         break;
 295                 }
 296                 cgc.cmd[0] = READ_TOC;  /* Read TOC */
 297                 cgc.cmd[6] = rc & 0x7f; /* number of last session */
 298                 cgc.cmd[8] = 0x0c;
 299                 cgc.cmd[9] = 0x40;
 300                 cgc.buffer = buffer;
 301                 cgc.buflen = 12;
 302                 cgc.quiet = 1;
 303                 cgc.data_direction = DMA_FROM_DEVICE;
 304                 cgc.timeout = VENDOR_TIMEOUT;
 305                 rc = sr_do_ioctl(cd, &cgc);
 306                 if (rc != 0) {
 307                         break;
 308                 }
 309                 sector = buffer[11] + (buffer[10] << 8) +
 310                     (buffer[9] << 16) + (buffer[8] << 24);
 311                 break;
 312
 313         default:
 314                 /* should not happen */
 315                 sr_printk(KERN_WARNING, cd,
 316                           "unknown vendor code (%i), not initialized ?\n",
 317                           cd->vendor);
 318                 sector = 0;
 319                 no_multi = 1;
 320                 break;
 321         }
 322         cd->ms_offset = sector;
 323         cd->xa_flag = 0;
 324         if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(cd))
 325                 cd->xa_flag = 1;
 326
 327         if (2048 != cd->device->sector_size) {
 328                 sr_set_blocklength(cd, 2048);
 329         }
 330         if (no_multi)
 331                 cdi->mask |= CDC_MULTI_SESSION;
 332
 333 #ifdef DEBUG
 334         if (sector)
 335                 sr_printk(KERN_DEBUG, cd, "multisession offset=%lu\n",
 336                           sector);
 337 #endif
 338         kfree(buffer);
 339         return rc;
 340 }