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
  41 #include <linux/blk.h>
  42 #include "scsi.h"
  43 #include "hosts.h"
  44 #include <scsi/scsi_ioctl.h>
  45
  46 #include <linux/cdrom.h>
  47 #include "sr.h"
  48
  49 #if 0
  50 #define DEBUG
  51 #endif
  52
  53 /* here are some constants to sort the vendors into groups */
  54
  55 #define VENDOR_SCSI3           1        /* default: scsi-3 mmc */
  56
  57 #define VENDOR_NEC             2
  58 #define VENDOR_TOSHIBA         3
  59 #define VENDOR_WRITER          4        /* pre-scsi3 writers */
  60
  61 #define VENDOR_ID (scsi_CDs[minor].vendor)
  62
  63 void sr_vendor_init(int minor)
  64 {
  65 #ifndef CONFIG_BLK_DEV_SR_VENDOR
  66         VENDOR_ID = VENDOR_SCSI3;
  67 #else
  68         char *vendor = scsi_CDs[minor].device->vendor;
  69         char *model = scsi_CDs[minor].device->model;
  70
  71         /* default */
  72         VENDOR_ID = VENDOR_SCSI3;
  73         if (scsi_CDs[minor].readcd_known)
  74                 /* this is true for scsi3/mmc drives - no more checks */
  75                 return;
  76
  77         if (scsi_CDs[minor].device->type == TYPE_WORM) {
  78                 VENDOR_ID = VENDOR_WRITER;
  79
  80         } else if (!strncmp(vendor, "NEC", 3)) {
  81                 VENDOR_ID = VENDOR_NEC;
  82                 if (!strncmp(model, "CD-ROM DRIVE:25", 15) ||
  83                     !strncmp(model, "CD-ROM DRIVE:36", 15) ||
  84                     !strncmp(model, "CD-ROM DRIVE:83", 15) ||
  85                     !strncmp(model, "CD-ROM DRIVE:84 ", 16)
  86 #if 0
  87                 /* my NEC 3x returns the read-raw data if a read-raw
  88                    is followed by a read for the same sector - aeb */
  89                     || !strncmp(model, "CD-ROM DRIVE:500", 16)
  90 #endif
  91                     )
  92                         /* these can't handle multisession, may hang */
  93                         scsi_CDs[minor].cdi.mask |= CDC_MULTI_SESSION;
  94
  95         } else if (!strncmp(vendor, "TOSHIBA", 7)) {
  96                 VENDOR_ID = VENDOR_TOSHIBA;
  97
  98         }
  99 #endif
 100 }
 101
 102
 103 /* small handy function for switching block length using MODE SELECT,
 104  * used by sr_read_sector() */
 105
 106 int sr_set_blocklength(int minor, int blocklength)
 107 {
 108         unsigned char *buffer;  /* the buffer for the ioctl */
 109         unsigned char cmd[MAX_COMMAND_SIZE];    /* the scsi-command */
 110         struct ccs_modesel_head *modesel;
 111         int rc, density = 0;
 112
 113 #ifdef CONFIG_BLK_DEV_SR_VENDOR
 114         if (VENDOR_ID == VENDOR_TOSHIBA)
 115                 density = (blocklength > 2048) ? 0x81 : 0x83;
 116 #endif
 117
 118         buffer = (unsigned char *) scsi_malloc(512);
 119         if (!buffer)
 120                 return -ENOMEM;
 121
 122 #ifdef DEBUG
 123         printk("sr%d: MODE SELECT 0x%x/%d\n", minor, density, blocklength);
 124 #endif
 125         memset(cmd, 0, MAX_COMMAND_SIZE);
 126         cmd[0] = MODE_SELECT;
 127         cmd[1] = (scsi_CDs[minor].device->scsi_level <= SCSI_2) ?
 128                  (scsi_CDs[minor].device->lun << 5) : 0;
 129         cmd[1] |= (1 << 4);
 130         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         if (0 == (rc = sr_do_ioctl(minor, cmd, buffer, sizeof(*modesel), 0, SCSI_DATA_WRITE, NULL))) {
 138                 scsi_CDs[minor].device->sector_size = blocklength;
 139         }
 140 #ifdef DEBUG
 141         else
 142                 printk("sr%d: switching blocklength to %d bytes failed\n",
 143                        minor, blocklength);
 144 #endif
 145         scsi_free(buffer, 512);
 146         return rc;
 147 }
 148
 149 /* This function gets called after a media change. Checks if the CD is
 150    multisession, asks for offset etc. */
 151
 152 #define BCD_TO_BIN(x)    ((((int)x & 0xf0) >> 4)*10 + ((int)x & 0x0f))
 153
 154 int sr_cd_check(struct cdrom_device_info *cdi)
 155 {
 156         unsigned long sector;
 157         unsigned char *buffer;  /* the buffer for the ioctl */
 158         unsigned char cmd[MAX_COMMAND_SIZE];    /* the scsi-command */
 159         int rc, no_multi, minor;
 160
 161         minor = MINOR(cdi->dev);
 162         if (scsi_CDs[minor].cdi.mask & CDC_MULTI_SESSION)
 163                 return 0;
 164
 165         buffer = (unsigned char *) scsi_malloc(512);
 166         if (!buffer)
 167                 return -ENOMEM;
 168
 169         sector = 0;             /* the multisession sector offset goes here  */
 170         no_multi = 0;           /* flag: the drive can't handle multisession */
 171         rc = 0;
 172
 173         switch (VENDOR_ID) {
 174
 175         case VENDOR_SCSI3:
 176                 memset(cmd, 0, MAX_COMMAND_SIZE);
 177                 cmd[0] = READ_TOC;
 178                 cmd[1] = (scsi_CDs[minor].device->scsi_level <= SCSI_2) ?
 179                          (scsi_CDs[minor].device->lun << 5) : 0;
 180                 cmd[8] = 12;
 181                 cmd[9] = 0x40;
 182                 rc = sr_do_ioctl(minor, cmd, buffer, 12, 1, SCSI_DATA_READ, NULL);
 183                 if (rc != 0)
 184                         break;
 185                 if ((buffer[0] << 8) + buffer[1] < 0x0a) {
 186                         printk(KERN_INFO "sr%d: Hmm, seems the drive "
 187                            "doesn't support multisession CD's\n", minor);
 188                         no_multi = 1;
 189                         break;
 190                 }
 191                 sector = buffer[11] + (buffer[10] << 8) +
 192                     (buffer[9] << 16) + (buffer[8] << 24);
 193                 if (buffer[6] <= 1) {
 194                         /* ignore sector offsets from first track */
 195                         sector = 0;
 196                 }
 197                 break;
 198
 199 #ifdef CONFIG_BLK_DEV_SR_VENDOR
 200         case VENDOR_NEC:{
 201                         unsigned long min, sec, frame;
 202                         memset(cmd, 0, MAX_COMMAND_SIZE);
 203                         cmd[0] = 0xde;
 204                         cmd[1] = (scsi_CDs[minor].device->scsi_level <= SCSI_2) ?
 205                                  (scsi_CDs[minor].device->lun << 5) : 0;
 206                         cmd[1] |= 0x03;
 207                         cmd[2] = 0xb0;
 208                         rc = sr_do_ioctl(minor, cmd, buffer, 0x16, 1, SCSI_DATA_READ, NULL);
 209                         if (rc != 0)
 210                                 break;
 211                         if (buffer[14] != 0 && buffer[14] != 0xb0) {
 212                                 printk(KERN_INFO "sr%d: Hmm, seems the cdrom "
 213                                        "doesn't support multisession CD's\n", minor);
 214                                 no_multi = 1;
 215                                 break;
 216                         }
 217                         min = BCD_TO_BIN(buffer[15]);
 218                         sec = BCD_TO_BIN(buffer[16]);
 219                         frame = BCD_TO_BIN(buffer[17]);
 220                         sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
 221                         break;
 222                 }
 223
 224         case VENDOR_TOSHIBA:{
 225                         unsigned long min, sec, frame;
 226
 227                         /* we request some disc information (is it a XA-CD ?,
 228                          * where starts the last session ?) */
 229                         memset(cmd, 0, MAX_COMMAND_SIZE);
 230                         cmd[0] = 0xc7;
 231                         cmd[1] = (scsi_CDs[minor].device->scsi_level <= SCSI_2) ?
 232                                  (scsi_CDs[minor].device->lun << 5) : 0;
 233                         cmd[1] |= 0x03;
 234                         rc = sr_do_ioctl(minor, cmd, buffer, 4, 1, SCSI_DATA_READ, NULL);
 235                         if (rc == -EINVAL) {
 236                                 printk(KERN_INFO "sr%d: Hmm, seems the drive "
 237                                        "doesn't support multisession CD's\n", minor);
 238                                 no_multi = 1;
 239                                 break;
 240                         }
 241                         if (rc != 0)
 242                                 break;
 243                         min = BCD_TO_BIN(buffer[1]);
 244                         sec = BCD_TO_BIN(buffer[2]);
 245                         frame = BCD_TO_BIN(buffer[3]);
 246                         sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame;
 247                         if (sector)
 248                                 sector -= CD_MSF_OFFSET;
 249                         sr_set_blocklength(minor, 2048);
 250                         break;
 251                 }
 252
 253         case VENDOR_WRITER:
 254                 memset(cmd, 0, MAX_COMMAND_SIZE);
 255                 cmd[0] = READ_TOC;
 256                 cmd[1] = (scsi_CDs[minor].device->scsi_level <= SCSI_2) ?
 257                          (scsi_CDs[minor].device->lun << 5) : 0;
 258                 cmd[8] = 0x04;
 259                 cmd[9] = 0x40;
 260                 rc = sr_do_ioctl(minor, cmd, buffer, 0x04, 1, SCSI_DATA_READ, NULL);
 261                 if (rc != 0) {
 262                         break;
 263                 }
 264                 if ((rc = buffer[2]) == 0) {
 265                         printk(KERN_WARNING
 266                                "sr%d: No finished session\n", minor);
 267                         break;
 268                 }
 269                 cmd[0] = READ_TOC;      /* Read TOC */
 270                 cmd[1] = (scsi_CDs[minor].device->scsi_level <= SCSI_2) ?
 271                          (scsi_CDs[minor].device->lun << 5) : 0;
 272                 cmd[6] = rc & 0x7f;     /* number of last session */
 273                 cmd[8] = 0x0c;
 274                 cmd[9] = 0x40;
 275                 rc = sr_do_ioctl(minor, cmd, buffer, 12, 1, SCSI_DATA_READ, NULL);
 276                 if (rc != 0) {
 277                         break;
 278                 }
 279                 sector = buffer[11] + (buffer[10] << 8) +
 280                     (buffer[9] << 16) + (buffer[8] << 24);
 281                 break;
 282 #endif                          /* CONFIG_BLK_DEV_SR_VENDOR */
 283
 284         default:
 285                 /* should not happen */
 286                 printk(KERN_WARNING
 287                    "sr%d: unknown vendor code (%i), not initialized ?\n",
 288                        minor, VENDOR_ID);
 289                 sector = 0;
 290                 no_multi = 1;
 291                 break;
 292         }
 293         scsi_CDs[minor].ms_offset = sector;
 294         scsi_CDs[minor].xa_flag = 0;
 295         if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(minor))
 296                 scsi_CDs[minor].xa_flag = 1;
 297
 298         if (2048 != scsi_CDs[minor].device->sector_size) {
 299                 sr_set_blocklength(minor, 2048);
 300         }
 301         if (no_multi)
 302                 cdi->mask |= CDC_MULTI_SESSION;
 303
 304 #ifdef DEBUG
 305         if (sector)
 306                 printk(KERN_DEBUG "sr%d: multisession offset=%lu\n",
 307                        minor, sector);
 308 #endif
 309         scsi_free(buffer, 512);
 310         return rc;
 311 }