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
  43 #include <scsi/scsi.h>
  44 #include <scsi/scsi_cmnd.h>
  45 #include <scsi/scsi_device.h>
  46 #include <scsi/scsi_host.h>
  47 #include <scsi/scsi_ioctl.h>
  48
  49 #include "sr.h"
  50
  51 #if 0
  52 #define DEBUG
  53 #endif
  54
  55 /* here are some constants to sort the vendors into groups */
  56
  57 #define VENDOR_SCSI3           1        /* default: scsi-3 mmc */
  58
  59 #define VENDOR_NEC             2
  60 #define VENDOR_TOSHIBA         3
  61 #define VENDOR_WRITER          4        /* pre-scsi3 writers */
  62
  63 #define VENDOR_TIMEOUT  30*HZ
  64
  65 void sr_vendor_init(Scsi_CD *cd)
  66 {
  67 #ifndef CONFIG_BLK_DEV_SR_VENDOR
  68         cd->vendor = VENDOR_SCSI3;
  69 #else
  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         }
 101 #endif
 102 }
 103
 104
 105 /* small handy function for switching block length using MODE SELECT,
 106  * used by sr_read_sector() */
 107
 108 int sr_set_blocklength(Scsi_CD *cd, int blocklength)
 109 {
 110         unsigned char *buffer;  /* the buffer for the ioctl */
 111         struct packet_command cgc;
 112         struct ccs_modesel_head *modesel;
 113         int rc, density = 0;
 114
 115 #ifdef CONFIG_BLK_DEV_SR_VENDOR
 116         if (cd->vendor == VENDOR_TOSHIBA)
 117                 density = (blocklength > 2048) ? 0x81 : 0x83;
 118 #endif
 119
 120         buffer = (unsigned char *) kmalloc(512, GFP_KERNEL | GFP_DMA);
 121         if (!buffer)
 122                 return -ENOMEM;
 123
 124 #ifdef DEBUG
 125         printk("%s: MODE SELECT 0x%x/%d\n", cd->cdi.name, density, blocklength);
 126 #endif
 127         memset(&cgc, 0, sizeof(struct packet_command));
 128         cgc.cmd[0] = MODE_SELECT;
 129         cgc.cmd[1] = (1 << 4);
 130         cgc.cmd[4] = 12;
 131         modesel = (struct ccs_modesel_head *) buffer;
 132         memset(modesel, 0, sizeof(*modesel));
 133         modesel->block_desc_length = 0x08;
 134         modesel->density = density;
 135         modesel->block_length_med = (blocklength >> 8) & 0xff;
 136         modesel->block_length_lo = blocklength & 0xff;
 137         cgc.buffer = buffer;
 138         cgc.buflen = sizeof(*modesel);
 139         cgc.data_direction = DMA_TO_DEVICE;
 140         cgc.timeout = VENDOR_TIMEOUT;
 141         if (0 == (rc = sr_do_ioctl(cd, &cgc))) {
 142                 cd->device->sector_size = blocklength;
 143         }
 144 #ifdef DEBUG
 145         else
 146                 printk("%s: switching blocklength to %d bytes failed\n",
 147                        cd->cdi.name, blocklength);
 148 #endif
 149         kfree(buffer);
 150         return rc;
 151 }
 152
 153 /* This function gets called after a media change. Checks if the CD is
 154    multisession, asks for offset etc. */
 155
 156 int sr_cd_check(struct cdrom_device_info *cdi)
 157 {
 158         Scsi_CD *cd = cdi->handle;
 159         unsigned long sector;
 160         unsigned char *buffer;  /* the buffer for the ioctl */
 161         struct packet_command cgc;
 162         int rc, no_multi;
 163
 164         if (cd->cdi.mask & CDC_MULTI_SESSION)
 165                 return 0;
 166
 167         buffer = (unsigned char *) kmalloc(512, GFP_KERNEL | GFP_DMA);
 168         if (!buffer)
 169                 return -ENOMEM;
 170
 171         sector = 0;             /* the multisession sector offset goes here  */
 172         no_multi = 0;           /* flag: the drive can't handle multisession */
 173         rc = 0;
 174
 175         memset(&cgc, 0, sizeof(struct packet_command));
 176
 177         switch (cd->vendor) {
 178
 179         case VENDOR_SCSI3:
 180                 cgc.cmd[0] = READ_TOC;
 181                 cgc.cmd[8] = 12;
 182                 cgc.cmd[9] = 0x40;
 183                 cgc.buffer = buffer;
 184                 cgc.buflen = 12;
 185                 cgc.quiet = 1;
 186                 cgc.data_direction = DMA_FROM_DEVICE;
 187                 cgc.timeout = VENDOR_TIMEOUT;
 188                 rc = sr_do_ioctl(cd, &cgc);
 189                 if (rc != 0)
 190                         break;
 191                 if ((buffer[0] << 8) + buffer[1] < 0x0a) {
 192                         printk(KERN_INFO "%s: Hmm, seems the drive "
 193                            "doesn't support multisession CD's\n", cd->cdi.name);
 194                         no_multi = 1;
 195                         break;
 196                 }
 197                 sector = buffer[11] + (buffer[10] << 8) +
 198                     (buffer[9] << 16) + (buffer[8] << 24);
 199                 if (buffer[6] <= 1) {
 200                         /* ignore sector offsets from first track */
 201                         sector = 0;
 202                 }
 203                 break;
 204
 205 #ifdef CONFIG_BLK_DEV_SR_VENDOR
 206         case VENDOR_NEC:{
 207                         unsigned long min, sec, frame;
 208                         cgc.cmd[0] = 0xde;
 209                         cgc.cmd[1] = 0x03;
 210                         cgc.cmd[2] = 0xb0;
 211                         cgc.buffer = buffer;
 212                         cgc.buflen = 0x16;
 213                         cgc.quiet = 1;
 214                         cgc.data_direction = DMA_FROM_DEVICE;
 215                         cgc.timeout = VENDOR_TIMEOUT;
 216                         rc = sr_do_ioctl(cd, &cgc);
 217                         if (rc != 0)
 218                                 break;
 219                         if (buffer[14] != 0 && buffer[14] != 0xb0) {
 220                                 printk(KERN_INFO "%s: Hmm, seems the cdrom "
 221                                        "doesn't support multisession CD's\n",
 222                                        cd->cdi.name);
 223                                 no_multi = 1;
 224                                 break;
 225                         }
 226                         min = BCD2BIN(buffer[15]);
 227                         sec = BCD2BIN(buffer[16]);
 228                         frame = BCD2BIN(buffer[17]);
 229                         sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
 230                         break;
 231                 }
 232
 233         case VENDOR_TOSHIBA:{
 234                         unsigned long min, sec, frame;
 235
 236                         /* we request some disc information (is it a XA-CD ?,
 237                          * where starts the last session ?) */
 238                         cgc.cmd[0] = 0xc7;
 239                         cgc.cmd[1] = 0x03;
 240                         cgc.buffer = buffer;
 241                         cgc.buflen = 4;
 242                         cgc.quiet = 1;
 243                         cgc.data_direction = DMA_FROM_DEVICE;
 244                         cgc.timeout = VENDOR_TIMEOUT;
 245                         rc = sr_do_ioctl(cd, &cgc);
 246                         if (rc == -EINVAL) {
 247                                 printk(KERN_INFO "%s: Hmm, seems the drive "
 248                                        "doesn't support multisession CD's\n",
 249                                        cd->cdi.name);
 250                                 no_multi = 1;
 251                                 break;
 252                         }
 253                         if (rc != 0)
 254                                 break;
 255                         min = BCD2BIN(buffer[1]);
 256                         sec = BCD2BIN(buffer[2]);
 257                         frame = BCD2BIN(buffer[3]);
 258                         sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
 259                         if (sector)
 260                                 sector -= CD_MSF_OFFSET;
 261                         sr_set_blocklength(cd, 2048);
 262                         break;
 263                 }
 264
 265         case VENDOR_WRITER:
 266                 cgc.cmd[0] = READ_TOC;
 267                 cgc.cmd[8] = 0x04;
 268                 cgc.cmd[9] = 0x40;
 269                 cgc.buffer = buffer;
 270                 cgc.buflen = 0x04;
 271                 cgc.quiet = 1;
 272                 cgc.data_direction = DMA_FROM_DEVICE;
 273                 cgc.timeout = VENDOR_TIMEOUT;
 274                 rc = sr_do_ioctl(cd, &cgc);
 275                 if (rc != 0) {
 276                         break;
 277                 }
 278                 if ((rc = buffer[2]) == 0) {
 279                         printk(KERN_WARNING
 280                                "%s: No finished session\n", cd->cdi.name);
 281                         break;
 282                 }
 283                 cgc.cmd[0] = READ_TOC;  /* Read TOC */
 284                 cgc.cmd[6] = rc & 0x7f; /* number of last session */
 285                 cgc.cmd[8] = 0x0c;
 286                 cgc.cmd[9] = 0x40;
 287                 cgc.buffer = buffer;
 288                 cgc.buflen = 12;
 289                 cgc.quiet = 1;
 290                 cgc.data_direction = DMA_FROM_DEVICE;
 291                 cgc.timeout = VENDOR_TIMEOUT;
 292                 rc = sr_do_ioctl(cd, &cgc);
 293                 if (rc != 0) {
 294                         break;
 295                 }
 296                 sector = buffer[11] + (buffer[10] << 8) +
 297                     (buffer[9] << 16) + (buffer[8] << 24);
 298                 break;
 299 #endif                          /* CONFIG_BLK_DEV_SR_VENDOR */
 300
 301         default:
 302                 /* should not happen */
 303                 printk(KERN_WARNING
 304                    "%s: unknown vendor code (%i), not initialized ?\n",
 305                        cd->cdi.name, cd->vendor);
 306                 sector = 0;
 307                 no_multi = 1;
 308                 break;
 309         }
 310         cd->ms_offset = sector;
 311         cd->xa_flag = 0;
 312         if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(cd))
 313                 cd->xa_flag = 1;
 314
 315         if (2048 != cd->device->sector_size) {
 316                 sr_set_blocklength(cd, 2048);
 317         }
 318         if (no_multi)
 319                 cdi->mask |= CDC_MULTI_SESSION;
 320
 321 #ifdef DEBUG
 322         if (sector)
 323                 printk(KERN_DEBUG "%s: multisession offset=%lu\n",
 324                        cd->cdi.name, sector);
 325 #endif
 326         kfree(buffer);
 327         return rc;
 328 }