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