drivers/scsi/sr

/* */
This source file includes following definitions.
sr_ioctl_done
do_ioctl
sr_ioctl
   1 #include <linux/kernel.h>
   2 #include <linux/sched.h>
   3 #include <linux/fs.h>
   4 #include <asm/segment.h>
   5 #include <linux/errno.h>
   6 
   7 #include "../block/blk.h"
   8 #include "scsi.h"
   9 #include "hosts.h"
  10 #include "sr.h"
  11 #include "scsi_ioctl.h"
  12 
  13 #include <linux/cdrom.h>
  14 
  15 #define IOCTL_RETRIES 3
  16 /* The CDROM is fairly slow, so we need a little extra time */
  17 #define IOCTL_TIMEOUT 200
  18 
  19 extern int scsi_ioctl (Scsi_Device *dev, int cmd, void *arg);
  20 
  21 static void sr_ioctl_done(Scsi_Cmnd * SCpnt)
     /*  */
  22 {
  23   struct request * req;
  24   
  25   req = &SCpnt->request;
  26   req->dev = 0xfffe; /* Busy, but indicate request done */
  27   
  28   if (req->sem != NULL) {
  29     up(req->sem);
  30   }
  31 }
  32 
  33 /* We do our own retries because we want to know what the specific
  34    error code is.  Normally the UNIT_ATTENTION code will automatically
  35    clear after one error */
  36 
  37 static int do_ioctl(int target, unsigned char * sr_cmd, void * buffer, unsigned buflength)
     /*  */
  38 {
  39         Scsi_Cmnd * SCpnt;
  40         int result;
  41 
  42         SCpnt = allocate_device(NULL, scsi_CDs[target].device, 1);
  43         scsi_do_cmd(SCpnt,
  44                     (void *) sr_cmd, buffer, buflength, sr_ioctl_done, 
  45                     IOCTL_TIMEOUT, IOCTL_RETRIES);
  46 
  47 
  48         if (SCpnt->request.dev != 0xfffe){
  49           struct semaphore sem = MUTEX_LOCKED;
  50           SCpnt->request.sem = &sem;
  51           down(&sem);
  52           /* Hmm.. Have to ask about this */
  53           while (SCpnt->request.dev != 0xfffe) schedule();
  54         };
  55 
  56         result = SCpnt->result;
  57 
  58 /* Minimal error checking.  Ignore cases we know about, and report the rest. */
  59         if(driver_byte(result) != 0)
  60           switch(SCpnt->sense_buffer[2] & 0xf) {
  61           case UNIT_ATTENTION:
  62             scsi_CDs[target].device->changed = 1;
  63             printk("Disc change detected.\n");
  64             break;
  65           case NOT_READY: /* This happens if there is no disc in drive */
  66             printk("CDROM not ready.  Make sure there is a disc in the drive.\n");
  67             break;
  68           case ILLEGAL_REQUEST:
  69             printk("CDROM (ioctl) reports ILLEGAL REQUEST.\n");
  70             break;
  71           default:
  72             printk("SCSI CD error: host %d id %d lun %d return code = %03x\n", 
  73                    scsi_CDs[target].device->host->host_no, 
  74                    scsi_CDs[target].device->id,
  75                    scsi_CDs[target].device->lun,
  76                    result);
  77             printk("\tSense class %x, sense error %x, extended sense %x\n",
  78                    sense_class(SCpnt->sense_buffer[0]), 
  79                    sense_error(SCpnt->sense_buffer[0]),
  80                    SCpnt->sense_buffer[2] & 0xf);
  81             
  82         };
  83 
  84         result = SCpnt->result;
  85         SCpnt->request.dev = -1; /* Deallocate */
  86         wake_up(&SCpnt->device->device_wait);
  87         /* Wake up a process waiting for device*/
  88         return result;
  89 }
  90 
  91 int sr_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg)
     /*  */
  92 {
  93         u_char  sr_cmd[10];
  94 
  95         int dev = inode->i_rdev;
  96         int result, target, err;
  97 
  98         target = MINOR(dev);
  99         if (target >= NR_SR) return -ENXIO;
 100 
 101         switch (cmd) 
 102                 {
 103                 /* Sun-compatible */
 104                 case CDROMPAUSE:
 105 
 106                         sr_cmd[0] = SCMD_PAUSE_RESUME;
 107                         sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 108                         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = 0;
 109                         sr_cmd[5] = sr_cmd[6] = sr_cmd[7] = 0;
 110                         sr_cmd[8] = 0;
 111                         sr_cmd[9] = 0;
 112 
 113                         result = do_ioctl(target, sr_cmd, NULL, 255);
 114                         return result;
 115 
 116                 case CDROMRESUME:
 117 
 118                         sr_cmd[0] = SCMD_PAUSE_RESUME;
 119                         sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 120                         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = 0;
 121                         sr_cmd[5] = sr_cmd[6] = sr_cmd[7] = 0;
 122                         sr_cmd[8] = 1;
 123                         sr_cmd[9] = 0;
 124 
 125                         result = do_ioctl(target, sr_cmd, NULL, 255);
 126 
 127                         return result;
 128 
 129                 case CDROMPLAYMSF:
 130                         {
 131                         struct cdrom_msf msf;
 132                         memcpy_fromfs(&msf, (void *) arg, sizeof(msf));
 133 
 134                         sr_cmd[0] = SCMD_PLAYAUDIO_MSF;
 135                         sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 136                         sr_cmd[2] = 0;
 137                         sr_cmd[3] = msf.cdmsf_min0;
 138                         sr_cmd[4] = msf.cdmsf_sec0;
 139                         sr_cmd[5] = msf.cdmsf_frame0;
 140                         sr_cmd[6] = msf.cdmsf_min1;
 141                         sr_cmd[7] = msf.cdmsf_sec1;
 142                         sr_cmd[8] = msf.cdmsf_frame1;
 143                         sr_cmd[9] = 0;
 144 
 145                         result = do_ioctl(target, sr_cmd, NULL, 255);
 146                         return result;
 147                         }
 148 
 149                 case CDROMPLAYTRKIND:
 150                         {
 151                         struct cdrom_ti ti;
 152                         memcpy_fromfs(&ti, (void *) arg, sizeof(ti));
 153 
 154                         sr_cmd[0] = SCMD_PLAYAUDIO_TI;
 155                         sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 156                         sr_cmd[2] = 0;
 157                         sr_cmd[3] = 0;
 158                         sr_cmd[4] = ti.cdti_trk0;
 159                         sr_cmd[5] = ti.cdti_ind0;
 160                         sr_cmd[6] = 0;
 161                         sr_cmd[7] = ti.cdti_trk1;
 162                         sr_cmd[8] = ti.cdti_ind1;
 163                         sr_cmd[9] = 0;
 164 
 165                         result = do_ioctl(target, sr_cmd, NULL, 255);
 166 
 167                         return result;
 168                         }
 169 
 170                 case CDROMREADTOCHDR:
 171                         {
 172                         struct cdrom_tochdr tochdr;
 173                         char * buffer;
 174 
 175                         sr_cmd[0] = SCMD_READ_TOC;
 176                         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 0x02;    /* MSF format */
 177                         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
 178                         sr_cmd[6] = 0;
 179                         sr_cmd[7] = 0;              /* MSB of length (12) */
 180                         sr_cmd[8] = 12;             /* LSB of length */
 181                         sr_cmd[9] = 0;
 182 
 183                         buffer = (unsigned char *) scsi_malloc(512);
 184                         if(!buffer) return -ENOMEM;
 185 
 186                         result = do_ioctl(target, sr_cmd, buffer, 12);
 187 
 188                         tochdr.cdth_trk0 = buffer[2];
 189                         tochdr.cdth_trk1 = buffer[3];
 190 
 191                         scsi_free(buffer, 512);
 192 
 193                         err = verify_area (VERIFY_WRITE, (void *) arg, sizeof (struct cdrom_tochdr));
 194                         if (err)
 195                                 return err;
 196                         memcpy_tofs ((void *) arg, &tochdr, sizeof (struct cdrom_tochdr));
 197                         
 198                         return result;
 199                         }
 200 
 201                 case CDROMREADTOCENTRY:
 202                         {
 203                         struct cdrom_tocentry tocentry;
 204                         char * buffer;
 205 
 206                         verify_area (VERIFY_READ, (void *) arg, sizeof (struct cdrom_tocentry));
 207                         memcpy_fromfs (&tocentry, (void *) arg, sizeof (struct cdrom_tocentry));
 208 
 209                         sr_cmd[0] = SCMD_READ_TOC;
 210                         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 0x02;    /* MSF format */
 211                         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
 212                         sr_cmd[6] = tocentry.cdte_track;
 213                         sr_cmd[7] = 0;             /* MSB of length (12)  */
 214                         sr_cmd[8] = 12;            /* LSB of length */
 215                         sr_cmd[9] = 0;
 216 
 217                         buffer = (unsigned char *) scsi_malloc(512);
 218                         if(!buffer) return -ENOMEM;
 219 
 220                         result = do_ioctl (target, sr_cmd, buffer, 12);
 221 
 222                         if (tocentry.cdte_format == CDROM_MSF) {
 223                           tocentry.cdte_addr.msf.minute = buffer[9];
 224                           tocentry.cdte_addr.msf.second = buffer[10];
 225                           tocentry.cdte_addr.msf.frame = buffer[11];
 226                           tocentry.cdte_ctrl = buffer[5] & 0xf;
 227                         }
 228                         else
 229                           tocentry.cdte_addr.lba = (int) buffer[0];
 230 
 231                         scsi_free(buffer, 512);
 232 
 233                         err = verify_area (VERIFY_WRITE, (void *) arg, sizeof (struct cdrom_tocentry));
 234                         if (err)
 235                                 return err;
 236                         memcpy_tofs ((void *) arg, &tocentry, sizeof (struct cdrom_tocentry));
 237 
 238                         return result;
 239                         }
 240 
 241                 case CDROMSTOP:
 242                         sr_cmd[0] = START_STOP;
 243                         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 1;
 244                         sr_cmd[2] = sr_cmd[3] = sr_cmd[5] = 0;
 245                         sr_cmd[4] = 0;
 246 
 247                         result = do_ioctl(target, sr_cmd, NULL, 255);
 248                         return result;
 249                         
 250                 case CDROMSTART:
 251                         sr_cmd[0] = START_STOP;
 252                         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 1;
 253                         sr_cmd[2] = sr_cmd[3] = sr_cmd[5] = 0;
 254                         sr_cmd[4] = 1;
 255 
 256                         result = do_ioctl(target, sr_cmd, NULL, 255);
 257                         return result;
 258 
 259                 case CDROMEJECT:
 260                         if (scsi_CDs[target].device -> access_count == 1)
 261                           sr_ioctl (inode, NULL, SCSI_IOCTL_DOORUNLOCK, 0);
 262 
 263                         sr_cmd[0] = START_STOP;
 264                         sr_cmd[1] = ((scsi_CDs[target].device -> lun) << 5) | 1;
 265                         sr_cmd[2] = sr_cmd[3] = sr_cmd[5] = 0;
 266                         sr_cmd[4] = 0x02;
 267 
 268                         if (!(result = do_ioctl(target, sr_cmd, NULL, 255)))
 269                           scsi_CDs[target].device -> changed = 1;
 270 
 271                         return result;
 272 
 273                 case CDROMVOLCTRL:
 274                         {
 275                           char * buffer, * mask;
 276                           struct cdrom_volctrl volctrl;
 277 
 278                           verify_area (VERIFY_READ, (void *) arg, sizeof (struct cdrom_volctrl));
 279                           memcpy_fromfs (&volctrl, (void *) arg, sizeof (struct cdrom_volctrl));
 280 
 281                           /* First we get the current params so we can just twiddle the volume */
 282 
 283                           sr_cmd[0] = MODE_SENSE;
 284                           sr_cmd[1] = (scsi_CDs[target].device -> lun) << 5;
 285                           sr_cmd[2] = 0xe;    /* Want mode page 0xe, CDROM audio params */
 286                           sr_cmd[3] = 0;
 287                           sr_cmd[4] = 28;
 288                           sr_cmd[5] = 0;
 289 
 290                           buffer = (unsigned char *) scsi_malloc(512);
 291                           if(!buffer) return -ENOMEM;
 292 
 293                           if ((result = do_ioctl (target, sr_cmd, buffer, 28))) {
 294                             printk ("Hosed while obtaining audio mode page\n");
 295                             scsi_free(buffer, 512);
 296                             return result;
 297                           }
 298 
 299                           sr_cmd[0] = MODE_SENSE;
 300                           sr_cmd[1] = (scsi_CDs[target].device -> lun) << 5;
 301                           sr_cmd[2] = 0x4e;   /* Want the mask for mode page 0xe */
 302                           sr_cmd[3] = 0;
 303                           sr_cmd[4] = 28;
 304                           sr_cmd[5] = 0;
 305 
 306                           mask = (unsigned char *) scsi_malloc(512);
 307                           if(!mask) {
 308                             scsi_free(buffer, 512);
 309                             return -ENOMEM;
 310                           };
 311 
 312                           if ((result = do_ioctl (target, sr_cmd, mask, 28))) {
 313                             printk ("Hosed while obtaining mask for audio mode page\n");
 314                             scsi_free(buffer, 512);
 315                             scsi_free(mask, 512);
 316                             return result;
 317                           }
 318 
 319                           /* Now mask and substitute our own volume and reuse the rest */
 320                           buffer[0] = 0;  /* Clear reserved field */
 321 
 322                           buffer[21] = volctrl.channel0 & mask[21];
 323                           buffer[23] = volctrl.channel1 & mask[23];
 324                           buffer[25] = volctrl.channel2 & mask[25];
 325                           buffer[27] = volctrl.channel3 & mask[27];
 326 
 327                           sr_cmd[0] = MODE_SELECT;
 328                           sr_cmd[1] = ((scsi_CDs[target].device -> lun) << 5) | 0x10;    /* Params are SCSI-2 */
 329                           sr_cmd[2] = sr_cmd[3] = 0;
 330                           sr_cmd[4] = 28;
 331                           sr_cmd[5] = 0;
 332 
 333                           result = do_ioctl (target, sr_cmd, buffer, 28);
 334                           scsi_free(buffer, 512);
 335                           scsi_free(mask, 512);
 336                           return result;
 337                         }
 338 
 339                 case CDROMSUBCHNL:
 340                         {
 341                           struct cdrom_subchnl subchnl;
 342                           char * buffer;
 343                           
 344                           sr_cmd[0] = SCMD_READ_SUBCHANNEL;
 345                           sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 0x02;    /* MSF format */
 346                           sr_cmd[2] = 0x40;    /* I do want the subchannel info */
 347                           sr_cmd[3] = 0x01;    /* Give me current position info */
 348                           sr_cmd[4] = sr_cmd[5] = 0;
 349                           sr_cmd[6] = 0;
 350                           sr_cmd[7] = 0;
 351                           sr_cmd[8] = 16;
 352                           sr_cmd[9] = 0;
 353 
 354                           buffer = (unsigned char*) scsi_malloc(512);
 355                           if(!buffer) return -ENOMEM;
 356 
 357                           result = do_ioctl(target, sr_cmd, buffer, 16);
 358 
 359                           subchnl.cdsc_audiostatus = buffer[1];
 360                           subchnl.cdsc_format = CDROM_MSF;
 361                           subchnl.cdsc_ctrl = buffer[5] & 0xf;
 362                           subchnl.cdsc_trk = buffer[6];
 363                           subchnl.cdsc_ind = buffer[7];
 364 
 365                           subchnl.cdsc_reladdr.msf.minute = buffer[13];
 366                           subchnl.cdsc_reladdr.msf.second = buffer[14];
 367                           subchnl.cdsc_reladdr.msf.frame = buffer[15];
 368                           subchnl.cdsc_absaddr.msf.minute = buffer[9];
 369                           subchnl.cdsc_absaddr.msf.second = buffer[10];
 370                           subchnl.cdsc_absaddr.msf.frame = buffer[11];
 371 
 372                           scsi_free(buffer, 512);
 373 
 374                           err = verify_area (VERIFY_WRITE, (void *) arg, sizeof (struct cdrom_subchnl));
 375                           if (err)
 376                                   return err;
 377                           memcpy_tofs ((void *) arg, &subchnl, sizeof (struct cdrom_subchnl));
 378                           return result;
 379                         }
 380 
 381                 case CDROMREADMODE2:
 382                         return -EINVAL;
 383                 case CDROMREADMODE1:
 384                         return -EINVAL;
 385 
 386                 case BLKRASET:
 387                         if(!suser())  return -EACCES;
 388                         if(!inode->i_rdev) return -EINVAL;
 389                         if(arg > 0xff) return -EINVAL;
 390                         read_ahead[MAJOR(inode->i_rdev)] = arg;
 391                         return 0;
 392                 RO_IOCTLS(dev,arg);
 393                 default:
 394                         return scsi_ioctl(scsi_CDs[target].device,cmd,(void *) arg);
 395                 }
 396 }
/* */
root/drivers/scsi/sr_ioctl.c

DEFINITIONS
