drivers/scsi/sr_vendor.c

   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/config.h>
  38 #include <linux/errno.h>
  39 #include <linux/string.h>
  40 #include <linux/bcd.h>
  41
  42 #include <linux/blkdev.h>
  43 #include "scsi.h"
  44 #include "hosts.h"
  45 #include <scsi/scsi_ioctl.h>
  46
  47 #include <linux/cdrom.h>
  48 #include "sr.h"
  49
  50 #if 0
  51 #define DEBUG
  52 #endif
  53
  54 /* here are some constants to sort the vendors into groups */
  55
  56 #define VENDOR_SCSI3           1        /* default: scsi-3 mmc */
  57
  58 #define VENDOR_NEC             2
  59 #define VENDOR_TOSHIBA         3
  60 #define VENDOR_WRITER          4        /* pre-scsi3 writers */
  61
  62 #define VENDOR_TIMEOUT  30*HZ
  63
  64 void sr_vendor_init(Scsi_CD *cd)
  65 {
  66 #ifndef CONFIG_BLK_DEV_SR_VENDOR
  67         cd->vendor = VENDOR_SCSI3;
  68 #else
  69         char *vendor = cd->device->vendor;
  70         char *model = cd->device->model;
  71
  72         /* default */
  73         cd->vendor = VENDOR_SCSI3;
  74         if (cd->readcd_known)
  75                 /* this is true for scsi3/mmc drives - no more checks */
  76                 return;
  77
  78         if (cd->device->type == TYPE_WORM) {
  79                 cd->vendor = VENDOR_WRITER;
  80
  81         } else if (!strncmp(vendor, "NEC", 3)) {
  82                 cd->vendor = VENDOR_NEC;
  83                 if (!strncmp(model, "CD-ROM DRIVE:25", 15) ||
  84                     !strncmp(model, "CD-ROM DRIVE:36", 15) ||
  85                     !strncmp(model, "CD-ROM DRIVE:83", 15) ||
  86                     !strncmp(model, "CD-ROM DRIVE:84 ", 16)
  87 #if 0
  88                 /* my NEC 3x returns the read-raw data if a read-raw
  89                    is followed by a read for the same sector - aeb */
  90                     || !strncmp(model, "CD-ROM DRIVE:500", 16)
  91 #endif
  92                     )
  93                         /* these can't handle multisession, may hang */
  94                         cd->cdi.mask |= CDC_MULTI_SESSION;
  95
  96         } else if (!strncmp(vendor, "TOSHIBA", 7)) {
  97                 cd->vendor = VENDOR_TOSHIBA;
  98
  99         }
 100 #endif
 101 }
 102
 103
 104 /* small handy function for switching block length using MODE SELECT,
 105  * used by sr_read_sector() */
 106
 107 int sr_set_blocklength(Scsi_CD *cd, int blocklength)
 108 {
 109         unsigned char *buffer;  /* the buffer for the ioctl */
 110         struct packet_command cgc;
 111         struct ccs_modesel_head *modesel;
 112         int rc, density = 0;
 113
 114 #ifdef CONFIG_BLK_DEV_SR_VENDOR
 115         if (cd->vendor == VENDOR_TOSHIBA)
 116                 density = (blocklength > 2048) ? 0x81 : 0x83;
 117 #endif
 118
 119         buffer = (unsigned char *) kmalloc(512, GFP_KERNEL | GFP_DMA);
 120         if (!buffer)
 121                 return -ENOMEM;
 122
 123 #ifdef DEBUG
 124         printk("%s: MODE SELECT 0x%x/%d\n", cd->cdi.name, density, blocklength);
 125 #endif
 126         memset(&cgc, 0, sizeof(struct packet_command));
 127         cgc.cmd[0] = MODE_SELECT;
 128         cgc.cmd[1] = (1 << 4);
 129         cgc.cmd[4] = 12;
 130         modesel = (struct ccs_modesel_head *) buffer;
 131         memset(modesel, 0, sizeof(*modesel));
 132         modesel->block_desc_length = 0x08;
 133         modesel->density = density;
 134         modesel->block_length_med = (blocklength >> 8) & 0xff;
 135         modesel->block_length_lo = blocklength & 0xff;
 136         cgc.buffer = buffer;
 137         cgc.buflen = sizeof(*modesel);
 138         cgc.data_direction = SCSI_DATA_WRITE;
 139         cgc.timeout = VENDOR_TIMEOUT;
 140         if (0 == (rc = sr_do_ioctl(cd, &cgc))) {
 141                 cd->device->sector_size = blocklength;
 142         }
 143 #ifdef DEBUG
 144         else
 145                 printk("%s: switching blocklength to %d bytes failed\n",
 146                        cd->cdi.name, blocklength);
 147 #endif
 148         kfree(buffer);
 149         return rc;
 150 }
 151
 152 /* This function gets called after a media change. Checks if the CD is
 153    multisession, asks for offset etc. */
 154
 155 int sr_cd_check(struct cdrom_device_info *cdi)
 156 {
 157         Scsi_CD *cd = cdi->handle;
 158         unsigned long sector;
 159         unsigned char *buffer;  /* the buffer for the ioctl */
 160         struct packet_command cgc;
 161         int rc, no_multi;
 162
 163         if (cd->cdi.mask & CDC_MULTI_SESSION)
 164                 return 0;
 165
 166         buffer = (unsigned char *) kmalloc(512, GFP_KERNEL | GFP_DMA);
 167         if (!buffer)
 168                 return -ENOMEM;
 169
 170         sector = 0;             /* the multisession sector offset goes here  */
 171         no_multi = 0;           /* flag: the drive can't handle multisession */
 172         rc = 0;
 173
 174         memset(&cgc, 0, sizeof(struct packet_command));
 175
 176         switch (cd->vendor) {
 177
 178         case VENDOR_SCSI3:
 179                 cgc.cmd[0] = READ_TOC;
 180                 cgc.cmd[8] = 12;
 181                 cgc.cmd[9] = 0x40;
 182                 cgc.buffer = buffer;
 183                 cgc.buflen = 12;
 184                 cgc.quiet = 1;
 185                 cgc.data_direction = SCSI_DATA_READ;
 186                 cgc.timeout = VENDOR_TIMEOUT;
 187                 rc = sr_do_ioctl(cd, &cgc);
 188                 if (rc != 0)
 189                         break;
 190                 if ((buffer[0] << 8) + buffer[1] < 0x0a) {
 191                         printk(KERN_INFO "%s: Hmm, seems the drive "
 192                            "doesn't support multisession CD's\n", cd->cdi.name);
 193                         no_multi = 1;
 194                         break;
 195                 }
 196                 sector = buffer[11] + (buffer[10] << 8) +
 197                     (buffer[9] << 16) + (buffer[8] << 24);
 198                 if (buffer[6] <= 1) {
 199                         /* ignore sector offsets from first track */
 200                         sector = 0;
 201                 }
 202                 break;
 203
 204 #ifdef CONFIG_BLK_DEV_SR_VENDOR
 205         case VENDOR_NEC:{
 206                         unsigned long min, sec, frame;
 207                         cgc.cmd[0] = 0xde;
 208                         cgc.cmd[1] = 0x03;
 209                         cgc.cmd[2] = 0xb0;
 210                         cgc.buffer = buffer;
 211                         cgc.buflen = 0x16;
 212                         cgc.quiet = 1;
 213                         cgc.data_direction = SCSI_DATA_READ;
 214                         cgc.timeout = VENDOR_TIMEOUT;
 215                         rc = sr_do_ioctl(cd, &cgc);
 216                         if (rc != 0)
 217                                 break;
 218                         if (buffer[14] != 0 && buffer[14] != 0xb0) {
 219                                 printk(KERN_INFO "%s: Hmm, seems the cdrom "
 220                                        "doesn't support multisession CD's\n",
 221                                        cd->cdi.name);
 222                                 no_multi = 1;
 223                                 break;
 224                         }
 225                         min = BCD2BIN(buffer[15]);
 226                         sec = BCD2BIN(buffer[16]);
 227                         frame = BCD2BIN(buffer[17]);
 228                         sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
 229                         break;
 230                 }
 231
 232         case VENDOR_TOSHIBA:{
 233                         unsigned long min, sec, frame;
 234
 235                         /* we request some disc information (is it a XA-CD ?,
 236                          * where starts the last session ?) */
 237                         cgc.cmd[0] = 0xc7;
 238                         cgc.cmd[1] = 0x03;
 239                         cgc.buffer = buffer;
 240                         cgc.buflen = 4;
 241                         cgc.quiet = 1;
 242                         cgc.data_direction = SCSI_DATA_READ;
 243                         cgc.timeout = VENDOR_TIMEOUT;
 244                         rc = sr_do_ioctl(cd, &cgc);
 245                         if (rc == -EINVAL) {
 246                                 printk(KERN_INFO "%s: Hmm, seems the drive "
 247                                        "doesn't support multisession CD's\n",
 248                                        cd->cdi.name);
 249                                 no_multi = 1;
 250                                 break;
 251                         }
 252                         if (rc != 0)
 253                                 break;
 254                         min = BCD2BIN(buffer[1]);
 255                         sec = BCD2BIN(buffer[2]);
 256                         frame = BCD2BIN(buffer[3]);
 257                         sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
 258                         if (sector)
 259                                 sector -= CD_MSF_OFFSET;
 260                         sr_set_blocklength(cd, 2048);
 261                         break;
 262                 }
 263
 264         case VENDOR_WRITER:
 265                 cgc.cmd[0] = READ_TOC;
 266                 cgc.cmd[8] = 0x04;
 267                 cgc.cmd[9] = 0x40;
 268                 cgc.buffer = buffer;
 269                 cgc.buflen = 0x04;
 270                 cgc.quiet = 1;
 271                 cgc.data_direction = SCSI_DATA_READ;
 272                 cgc.timeout = VENDOR_TIMEOUT;
 273                 rc = sr_do_ioctl(cd, &cgc);
 274                 if (rc != 0) {
 275                         break;
 276                 }
 277                 if ((rc = buffer[2]) == 0) {
 278                         printk(KERN_WARNING
 279                                "%s: No finished session\n", cd->cdi.name);
 280                         break;
 281                 }
 282                 cgc.cmd[0] = READ_TOC;  /* Read TOC */
 283                 cgc.cmd[6] = rc & 0x7f; /* number of last session */
 284                 cgc.cmd[8] = 0x0c;
 285                 cgc.cmd[9] = 0x40;
 286                 cgc.buffer = buffer;
 287                 cgc.buflen = 12;
 288                 cgc.quiet = 1;
 289                 cgc.data_direction = SCSI_DATA_READ;
 290                 cgc.timeout = VENDOR_TIMEOUT;
 291                 rc = sr_do_ioctl(cd, &cgc);
 292                 if (rc != 0) {
 293                         break;
 294                 }
 295                 sector = buffer[11] + (buffer[10] << 8) +
 296                     (buffer[9] << 16) + (buffer[8] << 24);
 297                 break;
 298 #endif                          /* CONFIG_BLK_DEV_SR_VENDOR */
 299
 300         default:
 301                 /* should not happen */
 302                 printk(KERN_WARNING
 303                    "%s: unknown vendor code (%i), not initialized ?\n",
 304                        cd->cdi.name, cd->vendor);
 305                 sector = 0;
 306                 no_multi = 1;
 307                 break;
 308         }
 309         cd->ms_offset = sector;
 310         cd->xa_flag = 0;
 311         if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(cd))
 312                 cd->xa_flag = 1;
 313
 314         if (2048 != cd->device->sector_size) {
 315                 sr_set_blocklength(cd, 2048);
 316         }
 317         if (no_multi)
 318                 cdi->mask |= CDC_MULTI_SESSION;
 319
 320 #ifdef DEBUG
 321         if (sector)
 322                 printk(KERN_DEBUG "%s: multisession offset=%lu\n",
 323                        cd->cdi.name, sector);
 324 #endif
 325         kfree(buffer);
 326         return rc;
 327 }