drivers/media/usb/sn9c102/sn9c102_core.c

   1 /***************************************************************************
   2  * V4L2 driver for SN9C1xx PC Camera Controllers                           *
   3  *                                                                         *
   4  * Copyright (C) 2004-2007 by Luca Risolia <luca.risolia@studio.unibo.it>  *
   5  *                                                                         *
   6  * This program is free software; you can redistribute it and/or modify    *
   7  * it under the terms of the GNU General Public License as published by    *
   8  * the Free Software Foundation; either version 2 of the License, or       *
   9  * (at your option) any later version.                                     *
  10  *                                                                         *
  11  * This program is distributed in the hope that it will be useful,         *
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of          *
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           *
  14  * GNU General Public License for more details.                            *
  15  *                                                                         *
  16  * You should have received a copy of the GNU General Public License       *
  17  * along with this program; if not, write to the Free Software             *
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.               *
  19  ***************************************************************************/
  20
  21 #include <linux/module.h>
  22 #include <linux/init.h>
  23 #include <linux/kernel.h>
  24 #include <linux/param.h>
  25 #include <linux/errno.h>
  26 #include <linux/slab.h>
  27 #include <linux/device.h>
  28 #include <linux/fs.h>
  29 #include <linux/delay.h>
  30 #include <linux/compiler.h>
  31 #include <linux/ioctl.h>
  32 #include <linux/poll.h>
  33 #include <linux/stat.h>
  34 #include <linux/mm.h>
  35 #include <linux/vmalloc.h>
  36 #include <linux/version.h>
  37 #include <linux/page-flags.h>
  38 #include <asm/byteorder.h>
  39 #include <asm/page.h>
  40 #include <asm/uaccess.h>
  41
  42 #include "sn9c102.h"
  43
  44 /*****************************************************************************/
  45
  46 #define SN9C102_MODULE_NAME     "V4L2 driver for SN9C1xx PC Camera Controllers"
  47 #define SN9C102_MODULE_ALIAS    "sn9c1xx"
  48 #define SN9C102_MODULE_AUTHOR   "(C) 2004-2007 Luca Risolia"
  49 #define SN9C102_AUTHOR_EMAIL    "<luca.risolia@studio.unibo.it>"
  50 #define SN9C102_MODULE_LICENSE  "GPL"
  51 #define SN9C102_MODULE_VERSION  "1:1.48"
  52
  53 /*****************************************************************************/
  54
  55 MODULE_DEVICE_TABLE(usb, sn9c102_id_table);
  56
  57 MODULE_AUTHOR(SN9C102_MODULE_AUTHOR " " SN9C102_AUTHOR_EMAIL);
  58 MODULE_DESCRIPTION(SN9C102_MODULE_NAME);
  59 MODULE_ALIAS(SN9C102_MODULE_ALIAS);
  60 MODULE_VERSION(SN9C102_MODULE_VERSION);
  61 MODULE_LICENSE(SN9C102_MODULE_LICENSE);
  62
  63 static short video_nr[] = {[0 ... SN9C102_MAX_DEVICES-1] = -1};
  64 module_param_array(video_nr, short, NULL, 0444);
  65 MODULE_PARM_DESC(video_nr,
  66                  " <-1|n[,...]>"
  67                  "\nSpecify V4L2 minor mode number."
  68                  "\n-1 = use next available (default)"
  69                  "\n n = use minor number n (integer >= 0)"
  70                  "\nYou can specify up to "__MODULE_STRING(SN9C102_MAX_DEVICES)
  71                  " cameras this way."
  72                  "\nFor example:"
  73                  "\nvideo_nr=-1,2,-1 would assign minor number 2 to"
  74                  "\nthe second camera and use auto for the first"
  75                  "\none and for every other camera."
  76                  "\n");
  77
  78 static bool force_munmap[] = {[0 ... SN9C102_MAX_DEVICES-1] =
  79                               SN9C102_FORCE_MUNMAP};
  80 module_param_array(force_munmap, bool, NULL, 0444);
  81 MODULE_PARM_DESC(force_munmap,
  82                  " <0|1[,...]>"
  83                  "\nForce the application to unmap previously"
  84                  "\nmapped buffer memory before calling any VIDIOC_S_CROP or"
  85                  "\nVIDIOC_S_FMT ioctl's. Not all the applications support"
  86                  "\nthis feature. This parameter is specific for each"
  87                  "\ndetected camera."
  88                  "\n0 = do not force memory unmapping"
  89                  "\n1 = force memory unmapping (save memory)"
  90                  "\nDefault value is "__MODULE_STRING(SN9C102_FORCE_MUNMAP)"."
  91                  "\n");
  92
  93 static unsigned int frame_timeout[] = {[0 ... SN9C102_MAX_DEVICES-1] =
  94                                        SN9C102_FRAME_TIMEOUT};
  95 module_param_array(frame_timeout, uint, NULL, 0644);
  96 MODULE_PARM_DESC(frame_timeout,
  97                  " <0|n[,...]>"
  98                  "\nTimeout for a video frame in seconds before"
  99                  "\nreturning an I/O error; 0 for infinity."
 100                  "\nThis parameter is specific for each detected camera."
 101                  "\nDefault value is "__MODULE_STRING(SN9C102_FRAME_TIMEOUT)"."
 102                  "\n");
 103
 104 #ifdef SN9C102_DEBUG
 105 static unsigned short debug = SN9C102_DEBUG_LEVEL;
 106 module_param(debug, ushort, 0644);
 107 MODULE_PARM_DESC(debug,
 108                  " <n>"
 109                  "\nDebugging information level, from 0 to 3:"
 110                  "\n0 = none (use carefully)"
 111                  "\n1 = critical errors"
 112                  "\n2 = significant informations"
 113                  "\n3 = more verbose messages"
 114                  "\nLevel 3 is useful for testing only."
 115                  "\nDefault value is "__MODULE_STRING(SN9C102_DEBUG_LEVEL)"."
 116                  "\n");
 117 #endif
 118
 119 /*
 120    Add the probe entries to this table. Be sure to add the entry in the right
 121    place, since, on failure, the next probing routine is called according to
 122    the order of the list below, from top to bottom.
 123 */
 124 static int (*sn9c102_sensor_table[])(struct sn9c102_device *) = {
 125         &sn9c102_probe_hv7131d, /* strong detection based on SENSOR ids */
 126         &sn9c102_probe_hv7131r, /* strong detection based on SENSOR ids */
 127         &sn9c102_probe_mi0343, /* strong detection based on SENSOR ids */
 128         &sn9c102_probe_mi0360, /* strong detection based on SENSOR ids */
 129         &sn9c102_probe_mt9v111, /* strong detection based on SENSOR ids */
 130         &sn9c102_probe_pas106b, /* strong detection based on SENSOR ids */
 131         &sn9c102_probe_pas202bcb, /* strong detection based on SENSOR ids */
 132         &sn9c102_probe_ov7630, /* strong detection based on SENSOR ids */
 133         &sn9c102_probe_ov7660, /* strong detection based on SENSOR ids */
 134         &sn9c102_probe_tas5110c1b, /* detection based on USB pid/vid */
 135         &sn9c102_probe_tas5110d, /* detection based on USB pid/vid */
 136         &sn9c102_probe_tas5130d1b, /* detection based on USB pid/vid */
 137 };
 138
 139 /*****************************************************************************/
 140
 141 static u32
 142 sn9c102_request_buffers(struct sn9c102_device* cam, u32 count,
 143                         enum sn9c102_io_method io)
 144 {
 145         struct v4l2_pix_format* p = &(cam->sensor.pix_format);
 146         struct v4l2_rect* r = &(cam->sensor.cropcap.bounds);
 147         size_t imagesize = cam->module_param.force_munmap || io == IO_READ ?
 148                            (p->width * p->height * p->priv) / 8 :
 149                            (r->width * r->height * p->priv) / 8;
 150         void* buff = NULL;
 151         u32 i;
 152
 153         if (count > SN9C102_MAX_FRAMES)
 154                 count = SN9C102_MAX_FRAMES;
 155
 156         if (cam->bridge == BRIDGE_SN9C105 || cam->bridge == BRIDGE_SN9C120)
 157                 imagesize += 589 + 2; /* length of JPEG header + EOI marker */
 158
 159         cam->nbuffers = count;
 160         while (cam->nbuffers > 0) {
 161                 if ((buff = vmalloc_32_user(cam->nbuffers *
 162                                             PAGE_ALIGN(imagesize))))
 163                         break;
 164                 cam->nbuffers--;
 165         }
 166
 167         for (i = 0; i < cam->nbuffers; i++) {
 168                 cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize);
 169                 cam->frame[i].buf.index = i;
 170                 cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize);
 171                 cam->frame[i].buf.length = imagesize;
 172                 cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 173                 cam->frame[i].buf.sequence = 0;
 174                 cam->frame[i].buf.field = V4L2_FIELD_NONE;
 175                 cam->frame[i].buf.memory = V4L2_MEMORY_MMAP;
 176                 cam->frame[i].buf.flags = 0;
 177         }
 178
 179         return cam->nbuffers;
 180 }
 181
 182
 183 static void sn9c102_release_buffers(struct sn9c102_device* cam)
 184 {
 185         if (cam->nbuffers) {
 186                 vfree(cam->frame[0].bufmem);
 187                 cam->nbuffers = 0;
 188         }
 189         cam->frame_current = NULL;
 190 }
 191
 192
 193 static void sn9c102_empty_framequeues(struct sn9c102_device* cam)
 194 {
 195         u32 i;
 196
 197         INIT_LIST_HEAD(&cam->inqueue);
 198         INIT_LIST_HEAD(&cam->outqueue);
 199
 200         for (i = 0; i < SN9C102_MAX_FRAMES; i++) {
 201                 cam->frame[i].state = F_UNUSED;
 202                 cam->frame[i].buf.bytesused = 0;
 203         }
 204 }
 205
 206
 207 static void sn9c102_requeue_outqueue(struct sn9c102_device* cam)
 208 {
 209         struct sn9c102_frame_t *i;
 210
 211         list_for_each_entry(i, &cam->outqueue, frame) {
 212                 i->state = F_QUEUED;
 213                 list_add(&i->frame, &cam->inqueue);
 214         }
 215
 216         INIT_LIST_HEAD(&cam->outqueue);
 217 }
 218
 219
 220 static void sn9c102_queue_unusedframes(struct sn9c102_device* cam)
 221 {
 222         unsigned long lock_flags;
 223         u32 i;
 224
 225         for (i = 0; i < cam->nbuffers; i++)
 226                 if (cam->frame[i].state == F_UNUSED) {
 227                         cam->frame[i].state = F_QUEUED;
 228                         spin_lock_irqsave(&cam->queue_lock, lock_flags);
 229                         list_add_tail(&cam->frame[i].frame, &cam->inqueue);
 230                         spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
 231                 }
 232 }
 233
 234 /*****************************************************************************/
 235
 236 /*
 237    Write a sequence of count value/register pairs. Returns -1 after the first
 238    failed write, or 0 for no errors.
 239 */
 240 int sn9c102_write_regs(struct sn9c102_device* cam, const u8 valreg[][2],
 241                        int count)
 242 {
 243         struct usb_device* udev = cam->usbdev;
 244         u8* buff = cam->control_buffer;
 245         int i, res;
 246
 247         for (i = 0; i < count; i++) {
 248                 u8 index = valreg[i][1];
 249
 250                 /*
 251                    index is a u8, so it must be <256 and can't be out of range.
 252                    If we put in a check anyway, gcc annoys us with a warning
 253                    hat our check is useless. People get all uppity when they
 254                    see warnings in the kernel compile.
 255                 */
 256
 257                 *buff = valreg[i][0];
 258
 259                 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08,
 260                                       0x41, index, 0, buff, 1,
 261                                       SN9C102_CTRL_TIMEOUT);
 262
 263                 if (res < 0) {
 264                         DBG(3, "Failed to write a register (value 0x%02X, "
 265                                "index 0x%02X, error %d)", *buff, index, res);
 266                         return -1;
 267                 }
 268
 269                 cam->reg[index] = *buff;
 270         }
 271
 272         return 0;
 273 }
 274
 275
 276 int sn9c102_write_reg(struct sn9c102_device* cam, u8 value, u16 index)
 277 {
 278         struct usb_device* udev = cam->usbdev;
 279         u8* buff = cam->control_buffer;
 280         int res;
 281
 282         if (index >= ARRAY_SIZE(cam->reg))
 283                 return -1;
 284
 285         *buff = value;
 286
 287         res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
 288                               index, 0, buff, 1, SN9C102_CTRL_TIMEOUT);
 289         if (res < 0) {
 290                 DBG(3, "Failed to write a register (value 0x%02X, index "
 291                        "0x%02X, error %d)", value, index, res);
 292                 return -1;
 293         }
 294
 295         cam->reg[index] = value;
 296
 297         return 0;
 298 }
 299
 300
 301 /* NOTE: with the SN9C10[123] reading some registers always returns 0 */
 302 int sn9c102_read_reg(struct sn9c102_device* cam, u16 index)
 303 {
 304         struct usb_device* udev = cam->usbdev;
 305         u8* buff = cam->control_buffer;
 306         int res;
 307
 308         res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
 309                               index, 0, buff, 1, SN9C102_CTRL_TIMEOUT);
 310         if (res < 0)
 311                 DBG(3, "Failed to read a register (index 0x%02X, error %d)",
 312                     index, res);
 313
 314         return (res >= 0) ? (int)(*buff) : -1;
 315 }
 316
 317
 318 int sn9c102_pread_reg(struct sn9c102_device* cam, u16 index)
 319 {
 320         if (index >= ARRAY_SIZE(cam->reg))
 321                 return -1;
 322
 323         return cam->reg[index];
 324 }
 325
 326
 327 static int
 328 sn9c102_i2c_wait(struct sn9c102_device* cam,
 329                  const struct sn9c102_sensor* sensor)
 330 {
 331         int i, r;
 332
 333         for (i = 1; i <= 5; i++) {
 334                 r = sn9c102_read_reg(cam, 0x08);
 335                 if (r < 0)
 336                         return -EIO;
 337                 if (r & 0x04)
 338                         return 0;
 339                 if (sensor->frequency & SN9C102_I2C_400KHZ)
 340                         udelay(5*16);
 341                 else
 342                         udelay(16*16);
 343         }
 344         return -EBUSY;
 345 }
 346
 347
 348 static int
 349 sn9c102_i2c_detect_read_error(struct sn9c102_device* cam,
 350                               const struct sn9c102_sensor* sensor)
 351 {
 352         int r , err = 0;
 353
 354         r = sn9c102_read_reg(cam, 0x08);
 355         if (r < 0)
 356                 err += r;
 357
 358         if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102) {
 359                 if (!(r & 0x08))
 360                         err += -1;
 361         } else {
 362                 if (r & 0x08)
 363                         err += -1;
 364         }
 365
 366         return err ? -EIO : 0;
 367 }
 368
 369
 370 static int
 371 sn9c102_i2c_detect_write_error(struct sn9c102_device* cam,
 372                                const struct sn9c102_sensor* sensor)
 373 {
 374         int r;
 375         r = sn9c102_read_reg(cam, 0x08);
 376         return (r < 0 || (r >= 0 && (r & 0x08))) ? -EIO : 0;
 377 }
 378
 379
 380 int
 381 sn9c102_i2c_try_raw_read(struct sn9c102_device* cam,
 382                          const struct sn9c102_sensor* sensor, u8 data0,
 383                          u8 data1, u8 n, u8 buffer[])
 384 {
 385         struct usb_device* udev = cam->usbdev;
 386         u8* data = cam->control_buffer;
 387         int i = 0, err = 0, res;
 388
 389         /* Write cycle */
 390         data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) |
 391                   ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) | 0x10;
 392         data[1] = data0; /* I2C slave id */
 393         data[2] = data1; /* address */
 394         data[7] = 0x10;
 395         res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
 396                               0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT);
 397         if (res < 0)
 398                 err += res;
 399
 400         err += sn9c102_i2c_wait(cam, sensor);
 401
 402         /* Read cycle - n bytes */
 403         data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) |
 404                   ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) |
 405                   (n << 4) | 0x02;
 406         data[1] = data0;
 407         data[7] = 0x10;
 408         res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
 409                               0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT);
 410         if (res < 0)
 411                 err += res;
 412
 413         err += sn9c102_i2c_wait(cam, sensor);
 414
 415         /* The first read byte will be placed in data[4] */
 416         res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
 417                               0x0a, 0, data, 5, SN9C102_CTRL_TIMEOUT);
 418         if (res < 0)
 419                 err += res;
 420
 421         err += sn9c102_i2c_detect_read_error(cam, sensor);
 422
 423         PDBGG("I2C read: address 0x%02X, first read byte: 0x%02X", data1,
 424               data[4]);
 425
 426         if (err) {
 427                 DBG(3, "I2C read failed for %s image sensor", sensor->name);
 428                 return -1;
 429         }
 430
 431         if (buffer)
 432                 for (i = 0; i < n && i < 5; i++)
 433                         buffer[n-i-1] = data[4-i];
 434
 435         return (int)data[4];
 436 }
 437
 438
 439 int
 440 sn9c102_i2c_try_raw_write(struct sn9c102_device* cam,
 441                           const struct sn9c102_sensor* sensor, u8 n, u8 data0,
 442                           u8 data1, u8 data2, u8 data3, u8 data4, u8 data5)
 443 {
 444         struct usb_device* udev = cam->usbdev;
 445         u8* data = cam->control_buffer;
 446         int err = 0, res;
 447
 448         /* Write cycle. It usually is address + value */
 449         data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) |
 450                   ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0)
 451                   | ((n - 1) << 4);
 452         data[1] = data0;
 453         data[2] = data1;
 454         data[3] = data2;
 455         data[4] = data3;
 456         data[5] = data4;
 457         data[6] = data5;
 458         data[7] = 0x17;
 459         res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41,
 460                               0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT);
 461         if (res < 0)
 462                 err += res;
 463
 464         err += sn9c102_i2c_wait(cam, sensor);
 465         err += sn9c102_i2c_detect_write_error(cam, sensor);
 466
 467         if (err)
 468                 DBG(3, "I2C write failed for %s image sensor", sensor->name);
 469
 470         PDBGG("I2C raw write: %u bytes, data0 = 0x%02X, data1 = 0x%02X, "
 471               "data2 = 0x%02X, data3 = 0x%02X, data4 = 0x%02X, data5 = 0x%02X",
 472               n, data0, data1, data2, data3, data4, data5);
 473
 474         return err ? -1 : 0;
 475 }
 476
 477
 478 int
 479 sn9c102_i2c_try_read(struct sn9c102_device* cam,
 480                      const struct sn9c102_sensor* sensor, u8 address)
 481 {
 482         return sn9c102_i2c_try_raw_read(cam, sensor, sensor->i2c_slave_id,
 483                                         address, 1, NULL);
 484 }
 485
 486
 487 static int sn9c102_i2c_try_write(struct sn9c102_device* cam,
 488                                  const struct sn9c102_sensor* sensor,
 489                                  u8 address, u8 value)
 490 {
 491         return sn9c102_i2c_try_raw_write(cam, sensor, 3,
 492                                          sensor->i2c_slave_id, address,
 493                                          value, 0, 0, 0);
 494 }
 495
 496
 497 int sn9c102_i2c_read(struct sn9c102_device* cam, u8 address)
 498 {
 499         return sn9c102_i2c_try_read(cam, &cam->sensor, address);
 500 }
 501
 502
 503 int sn9c102_i2c_write(struct sn9c102_device* cam, u8 address, u8 value)
 504 {
 505         return sn9c102_i2c_try_write(cam, &cam->sensor, address, value);
 506 }
 507
 508 /*****************************************************************************/
 509
 510 static size_t sn9c102_sof_length(struct sn9c102_device* cam)
 511 {
 512         switch (cam->bridge) {
 513         case BRIDGE_SN9C101:
 514         case BRIDGE_SN9C102:
 515                 return 12;
 516         case BRIDGE_SN9C103:
 517                 return 18;
 518         case BRIDGE_SN9C105:
 519         case BRIDGE_SN9C120:
 520                 return 62;
 521         }
 522
 523         return 0;
 524 }
 525
 526
 527 static void*
 528 sn9c102_find_sof_header(struct sn9c102_device* cam, void* mem, size_t len)
 529 {
 530         static const char marker[6] = {0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96};
 531         const char *m = mem;
 532         size_t soflen = 0, i, j;
 533
 534         soflen = sn9c102_sof_length(cam);
 535
 536         for (i = 0; i < len; i++) {
 537                 size_t b;
 538
 539                 /* Read the variable part of the header */
 540                 if (unlikely(cam->sof.bytesread >= sizeof(marker))) {
 541                         cam->sof.header[cam->sof.bytesread] = *(m+i);
 542                         if (++cam->sof.bytesread == soflen) {
 543                                 cam->sof.bytesread = 0;
 544                                 return mem + i;
 545                         }
 546                         continue;
 547                 }
 548
 549                 /* Search for the SOF marker (fixed part) in the header */
 550                 for (j = 0, b=cam->sof.bytesread; j+b < sizeof(marker); j++) {
 551                         if (unlikely(i+j == len))
 552                                 return NULL;
 553                         if (*(m+i+j) == marker[cam->sof.bytesread]) {
 554                                 cam->sof.header[cam->sof.bytesread] = *(m+i+j);
 555                                 if (++cam->sof.bytesread == sizeof(marker)) {
 556                                         PDBGG("Bytes to analyze: %zd. SOF "
 557                                               "starts at byte #%zd", len, i);
 558                                         i += j+1;
 559                                         break;
 560                                 }
 561                         } else {
 562                                 cam->sof.bytesread = 0;
 563                                 break;
 564                         }
 565                 }
 566         }
 567
 568         return NULL;
 569 }
 570
 571
 572 static void*
 573 sn9c102_find_eof_header(struct sn9c102_device* cam, void* mem, size_t len)
 574 {
 575         static const u8 eof_header[4][4] = {
 576                 {0x00, 0x00, 0x00, 0x00},
 577                 {0x40, 0x00, 0x00, 0x00},
 578                 {0x80, 0x00, 0x00, 0x00},
 579                 {0xc0, 0x00, 0x00, 0x00},
 580         };
 581         size_t i, j;
 582
 583         /* The EOF header does not exist in compressed data */
 584         if (cam->sensor.pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X ||
 585             cam->sensor.pix_format.pixelformat == V4L2_PIX_FMT_JPEG)
 586                 return NULL;
 587
 588         /*
 589            The EOF header might cross the packet boundary, but this is not a
 590            problem, since the end of a frame is determined by checking its size
 591            in the first place.
 592         */
 593         for (i = 0; (len >= 4) && (i <= len - 4); i++)
 594                 for (j = 0; j < ARRAY_SIZE(eof_header); j++)
 595                         if (!memcmp(mem + i, eof_header[j], 4))
 596                                 return mem + i;
 597
 598         return NULL;
 599 }
 600
 601
 602 static void
 603 sn9c102_write_jpegheader(struct sn9c102_device* cam, struct sn9c102_frame_t* f)
 604 {
 605         static const u8 jpeg_header[589] = {
 606                 0xff, 0xd8, 0xff, 0xdb, 0x00, 0x84, 0x00, 0x06, 0x04, 0x05,
 607                 0x06, 0x05, 0x04, 0x06, 0x06, 0x05, 0x06, 0x07, 0x07, 0x06,
 608                 0x08, 0x0a, 0x10, 0x0a, 0x0a, 0x09, 0x09, 0x0a, 0x14, 0x0e,
 609                 0x0f, 0x0c, 0x10, 0x17, 0x14, 0x18, 0x18, 0x17, 0x14, 0x16,
 610                 0x16, 0x1a, 0x1d, 0x25, 0x1f, 0x1a, 0x1b, 0x23, 0x1c, 0x16,
 611                 0x16, 0x20, 0x2c, 0x20, 0x23, 0x26, 0x27, 0x29, 0x2a, 0x29,
 612                 0x19, 0x1f, 0x2d, 0x30, 0x2d, 0x28, 0x30, 0x25, 0x28, 0x29,
 613                 0x28, 0x01, 0x07, 0x07, 0x07, 0x0a, 0x08, 0x0a, 0x13, 0x0a,
 614                 0x0a, 0x13, 0x28, 0x1a, 0x16, 0x1a, 0x28, 0x28, 0x28, 0x28,
 615                 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28,
 616                 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28,
 617                 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28,
 618                 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28,
 619                 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0xff, 0xc4, 0x01, 0xa2,
 620                 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
 621                 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02,
 622                 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x01,
 623                 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
 624                 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03,
 625                 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x10, 0x00,
 626                 0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, 0x05, 0x05, 0x04,
 627                 0x04, 0x00, 0x00, 0x01, 0x7d, 0x01, 0x02, 0x03, 0x00, 0x04,
 628                 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61,
 629                 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, 0x23,
 630                 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, 0x24, 0x33, 0x62,
 631                 0x72, 0x82, 0x09, 0x0a, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x25,
 632                 0x26, 0x27, 0x28, 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38,
 633                 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a,
 634                 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64,
 635                 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76,
 636                 0x77, 0x78, 0x79, 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88,
 637                 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99,
 638                 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa,
 639                 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2,
 640                 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3,
 641                 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, 0xe3,
 642                 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf1, 0xf2, 0xf3,
 643                 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0x11, 0x00, 0x02,
 644                 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05, 0x04, 0x04,
 645                 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11, 0x04,
 646                 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
 647                 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xa1, 0xb1,
 648                 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, 0x15, 0x62, 0x72, 0xd1,
 649                 0x0a, 0x16, 0x24, 0x34, 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19,
 650                 0x1a, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
 651                 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a,
 652                 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64,
 653                 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76,
 654                 0x77, 0x78, 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
 655                 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
 656                 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9,
 657                 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba,
 658                 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
 659                 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe2, 0xe3,
 660                 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf2, 0xf3, 0xf4,
 661                 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xff, 0xc0, 0x00, 0x11,
 662                 0x08, 0x01, 0xe0, 0x02, 0x80, 0x03, 0x01, 0x21, 0x00, 0x02,
 663                 0x11, 0x01, 0x03, 0x11, 0x01, 0xff, 0xda, 0x00, 0x0c, 0x03,
 664                 0x01, 0x00, 0x02, 0x11, 0x03, 0x11, 0x00, 0x3f, 0x00
 665         };
 666         u8 *pos = f->bufmem;
 667
 668         memcpy(pos, jpeg_header, sizeof(jpeg_header));
 669         *(pos + 6) = 0x00;
 670         *(pos + 7 + 64) = 0x01;
 671         if (cam->compression.quality == 0) {
 672                 memcpy(pos + 7, SN9C102_Y_QTABLE0, 64);
 673                 memcpy(pos + 8 + 64, SN9C102_UV_QTABLE0, 64);
 674         } else if (cam->compression.quality == 1) {
 675                 memcpy(pos + 7, SN9C102_Y_QTABLE1, 64);
 676                 memcpy(pos + 8 + 64, SN9C102_UV_QTABLE1, 64);
 677         }
 678         *(pos + 564) = cam->sensor.pix_format.width & 0xFF;
 679         *(pos + 563) = (cam->sensor.pix_format.width >> 8) & 0xFF;
 680         *(pos + 562) = cam->sensor.pix_format.height & 0xFF;
 681         *(pos + 561) = (cam->sensor.pix_format.height >> 8) & 0xFF;
 682         *(pos + 567) = 0x21;
 683
 684         f->buf.bytesused += sizeof(jpeg_header);
 685 }
 686
 687
 688 static void sn9c102_urb_complete(struct urb *urb)
 689 {
 690         struct sn9c102_device* cam = urb->context;
 691         struct sn9c102_frame_t** f;
 692         size_t imagesize, soflen;
 693         u8 i;
 694         int err = 0;
 695
 696         if (urb->status == -ENOENT)
 697                 return;
 698
 699         f = &cam->frame_current;
 700
 701         if (cam->stream == STREAM_INTERRUPT) {
 702                 cam->stream = STREAM_OFF;
 703                 if ((*f))
 704                         (*f)->state = F_QUEUED;
 705                 cam->sof.bytesread = 0;
 706                 DBG(3, "Stream interrupted by application");
 707                 wake_up(&cam->wait_stream);
 708         }
 709
 710         if (cam->state & DEV_DISCONNECTED)
 711                 return;
 712
 713         if (cam->state & DEV_MISCONFIGURED) {
 714                 wake_up_interruptible(&cam->wait_frame);
 715                 return;
 716         }
 717
 718         if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue))
 719                 goto resubmit_urb;
 720
 721         if (!(*f))
 722                 (*f) = list_entry(cam->inqueue.next, struct sn9c102_frame_t,
 723                                   frame);
 724
 725         imagesize = (cam->sensor.pix_format.width *
 726                      cam->sensor.pix_format.height *
 727                      cam->sensor.pix_format.priv) / 8;
 728         if (cam->sensor.pix_format.pixelformat == V4L2_PIX_FMT_JPEG)
 729                 imagesize += 589; /* length of jpeg header */
 730         soflen = sn9c102_sof_length(cam);
 731
 732         for (i = 0; i < urb->number_of_packets; i++) {
 733                 unsigned int img, len, status;
 734                 void *pos, *sof, *eof;
 735
 736                 len = urb->iso_frame_desc[i].actual_length;
 737                 status = urb->iso_frame_desc[i].status;
 738                 pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
 739
 740                 if (status) {
 741                         DBG(3, "Error in isochronous frame");
 742                         (*f)->state = F_ERROR;
 743                         cam->sof.bytesread = 0;
 744                         continue;
 745                 }
 746
 747                 PDBGG("Isochrnous frame: length %u, #%u i", len, i);
 748
 749 redo:
 750                 sof = sn9c102_find_sof_header(cam, pos, len);
 751                 if (likely(!sof)) {
 752                         eof = sn9c102_find_eof_header(cam, pos, len);
 753                         if ((*f)->state == F_GRABBING) {
 754 end_of_frame:
 755                                 img = len;
 756
 757                                 if (eof)
 758                                         img = (eof > pos) ? eof - pos - 1 : 0;
 759
 760                                 if ((*f)->buf.bytesused + img > imagesize) {
 761                                         u32 b;
 762                                         b = (*f)->buf.bytesused + img -
 763                                             imagesize;
 764                                         img = imagesize - (*f)->buf.bytesused;
 765                                         PDBGG("Expected EOF not found: video "
 766                                               "frame cut");
 767                                         if (eof)
 768                                                 DBG(3, "Exceeded limit: +%u "
 769                                                        "bytes", (unsigned)(b));
 770                                 }
 771
 772                                 memcpy((*f)->bufmem + (*f)->buf.bytesused, pos,
 773                                        img);
 774
 775                                 if ((*f)->buf.bytesused == 0)
 776                                         do_gettimeofday(&(*f)->buf.timestamp);
 777
 778                                 (*f)->buf.bytesused += img;
 779
 780                                 if ((*f)->buf.bytesused == imagesize ||
 781                                     ((cam->sensor.pix_format.pixelformat ==
 782                                       V4L2_PIX_FMT_SN9C10X ||
 783                                       cam->sensor.pix_format.pixelformat ==
 784                                       V4L2_PIX_FMT_JPEG) && eof)) {
 785                                         u32 b;
 786
 787                                         b = (*f)->buf.bytesused;
 788                                         (*f)->state = F_DONE;
 789                                         (*f)->buf.sequence= ++cam->frame_count;
 790
 791                                         spin_lock(&cam->queue_lock);
 792                                         list_move_tail(&(*f)->frame,
 793                                                        &cam->outqueue);
 794                                         if (!list_empty(&cam->inqueue))
 795                                                 (*f) = list_entry(
 796                                                         cam->inqueue.next,
 797                                                         struct sn9c102_frame_t,
 798                                                         frame );
 799                                         else
 800                                                 (*f) = NULL;
 801                                         spin_unlock(&cam->queue_lock);
 802
 803                                         memcpy(cam->sysfs.frame_header,
 804                                                cam->sof.header, soflen);
 805
 806                                         DBG(3, "Video frame captured: %lu "
 807                                                "bytes", (unsigned long)(b));
 808
 809                                         if (!(*f))
 810                                                 goto resubmit_urb;
 811
 812                                 } else if (eof) {
 813                                         (*f)->state = F_ERROR;
 814                                         DBG(3, "Not expected EOF after %lu "
 815                                                "bytes of image data",
 816                                             (unsigned long)
 817                                             ((*f)->buf.bytesused));
 818                                 }
 819
 820                                 if (sof) /* (1) */
 821                                         goto start_of_frame;
 822
 823                         } else if (eof) {
 824                                 DBG(3, "EOF without SOF");
 825                                 continue;
 826
 827                         } else {
 828                                 PDBGG("Ignoring pointless isochronous frame");
 829                                 continue;
 830                         }
 831
 832                 } else if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR) {
 833 start_of_frame:
 834                         (*f)->state = F_GRABBING;
 835                         (*f)->buf.bytesused = 0;
 836                         len -= (sof - pos);
 837                         pos = sof;
 838                         if (cam->sensor.pix_format.pixelformat ==
 839                             V4L2_PIX_FMT_JPEG)
 840                                 sn9c102_write_jpegheader(cam, (*f));
 841                         DBG(3, "SOF detected: new video frame");
 842                         if (len)
 843                                 goto redo;
 844
 845                 } else if ((*f)->state == F_GRABBING) {
 846                         eof = sn9c102_find_eof_header(cam, pos, len);
 847                         if (eof && eof < sof)
 848                                 goto end_of_frame; /* (1) */
 849                         else {
 850                                 if (cam->sensor.pix_format.pixelformat ==
 851                                     V4L2_PIX_FMT_SN9C10X ||
 852                                     cam->sensor.pix_format.pixelformat ==
 853                                     V4L2_PIX_FMT_JPEG) {
 854                                         if (sof - pos >= soflen) {
 855                                                 eof = sof - soflen;
 856                                         } else { /* remove header */
 857                                                 eof = pos;
 858                                                 (*f)->buf.bytesused -=
 859                                                         (soflen - (sof - pos));
 860                                         }
 861                                         goto end_of_frame;
 862                                 } else {
 863                                         DBG(3, "SOF before expected EOF after "
 864                                                "%lu bytes of image data",
 865                                             (unsigned long)
 866                                             ((*f)->buf.bytesused));
 867                                         goto start_of_frame;
 868                                 }
 869                         }
 870                 }
 871         }
 872
 873 resubmit_urb:
 874         urb->dev = cam->usbdev;
 875         err = usb_submit_urb(urb, GFP_ATOMIC);
 876         if (err < 0 && err != -EPERM) {
 877                 cam->state |= DEV_MISCONFIGURED;
 878                 DBG(1, "usb_submit_urb() failed");
 879         }
 880
 881         wake_up_interruptible(&cam->wait_frame);
 882 }
 883
 884
 885 static int sn9c102_start_transfer(struct sn9c102_device* cam)
 886 {
 887         struct usb_device *udev = cam->usbdev;
 888         struct urb* urb;
 889         struct usb_host_interface* altsetting = usb_altnum_to_altsetting(
 890                                                     usb_ifnum_to_if(udev, 0),
 891                                                     SN9C102_ALTERNATE_SETTING);
 892         const unsigned int psz = le16_to_cpu(altsetting->
 893                                              endpoint[0].desc.wMaxPacketSize);
 894         s8 i, j;
 895         int err = 0;
 896
 897         for (i = 0; i < SN9C102_URBS; i++) {
 898                 cam->transfer_buffer[i] = kzalloc(SN9C102_ISO_PACKETS * psz,
 899                                                   GFP_KERNEL);
 900                 if (!cam->transfer_buffer[i]) {
 901                         err = -ENOMEM;
 902                         DBG(1, "Not enough memory");
 903                         goto free_buffers;
 904                 }
 905         }
 906
 907         for (i = 0; i < SN9C102_URBS; i++) {
 908                 urb = usb_alloc_urb(SN9C102_ISO_PACKETS, GFP_KERNEL);
 909                 cam->urb[i] = urb;
 910                 if (!urb) {
 911                         err = -ENOMEM;
 912                         DBG(1, "usb_alloc_urb() failed");
 913                         goto free_urbs;
 914                 }
 915                 urb->dev = udev;
 916                 urb->context = cam;
 917                 urb->pipe = usb_rcvisocpipe(udev, 1);
 918                 urb->transfer_flags = URB_ISO_ASAP;
 919                 urb->number_of_packets = SN9C102_ISO_PACKETS;
 920                 urb->complete = sn9c102_urb_complete;
 921                 urb->transfer_buffer = cam->transfer_buffer[i];
 922                 urb->transfer_buffer_length = psz * SN9C102_ISO_PACKETS;
 923                 urb->interval = 1;
 924                 for (j = 0; j < SN9C102_ISO_PACKETS; j++) {
 925                         urb->iso_frame_desc[j].offset = psz * j;
 926                         urb->iso_frame_desc[j].length = psz;
 927                 }
 928         }
 929
 930         /* Enable video */
 931         if (!(cam->reg[0x01] & 0x04)) {
 932                 err = sn9c102_write_reg(cam, cam->reg[0x01] | 0x04, 0x01);
 933                 if (err) {
 934                         err = -EIO;
 935                         DBG(1, "I/O hardware error");
 936                         goto free_urbs;
 937                 }
 938         }
 939
 940         err = usb_set_interface(udev, 0, SN9C102_ALTERNATE_SETTING);
 941         if (err) {
 942                 DBG(1, "usb_set_interface() failed");
 943                 goto free_urbs;
 944         }
 945
 946         cam->frame_current = NULL;
 947         cam->sof.bytesread = 0;
 948
 949         for (i = 0; i < SN9C102_URBS; i++) {
 950                 err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
 951                 if (err) {
 952                         for (j = i-1; j >= 0; j--)
 953                                 usb_kill_urb(cam->urb[j]);
 954                         DBG(1, "usb_submit_urb() failed, error %d", err);
 955                         goto free_urbs;
 956                 }
 957         }
 958
 959         return 0;
 960
 961 free_urbs:
 962         for (i = 0; (i < SN9C102_URBS) && cam->urb[i]; i++)
 963                 usb_free_urb(cam->urb[i]);
 964
 965 free_buffers:
 966         for (i = 0; (i < SN9C102_URBS) && cam->transfer_buffer[i]; i++)
 967                 kfree(cam->transfer_buffer[i]);
 968
 969         return err;
 970 }
 971
 972
 973 static int sn9c102_stop_transfer(struct sn9c102_device* cam)
 974 {
 975         struct usb_device *udev = cam->usbdev;
 976         s8 i;
 977         int err = 0;
 978
 979         if (cam->state & DEV_DISCONNECTED)
 980                 return 0;
 981
 982         for (i = SN9C102_URBS-1; i >= 0; i--) {
 983                 usb_kill_urb(cam->urb[i]);
 984                 usb_free_urb(cam->urb[i]);
 985                 kfree(cam->transfer_buffer[i]);
 986         }
 987
 988         err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */
 989         if (err)
 990                 DBG(3, "usb_set_interface() failed");
 991
 992         return err;
 993 }
 994
 995
 996 static int sn9c102_stream_interrupt(struct sn9c102_device* cam)
 997 {
 998         cam->stream = STREAM_INTERRUPT;
 999         wait_event_timeout(cam->wait_stream,
1000                                      (cam->stream == STREAM_OFF) ||
1001                                      (cam->state & DEV_DISCONNECTED),
1002                                      SN9C102_URB_TIMEOUT);
1003         if (cam->state & DEV_DISCONNECTED)
1004                 return -ENODEV;
1005         else if (cam->stream != STREAM_OFF) {
1006                 cam->state |= DEV_MISCONFIGURED;
1007                 DBG(1, "URB timeout reached. The camera is misconfigured. "
1008                        "To use it, close and open %s again.",
1009                     video_device_node_name(cam->v4ldev));
1010                 return -EIO;
1011         }
1012
1013         return 0;
1014 }
1015
1016 /*****************************************************************************/
1017
1018 #ifdef CONFIG_VIDEO_ADV_DEBUG
1019 static u16 sn9c102_strtou16(const char* buff, size_t len, ssize_t* count)
1020 {
1021         char str[7];
1022         char* endp;
1023         unsigned long val;
1024
1025         if (len < 6) {
1026                 strncpy(str, buff, len);
1027                 str[len] = '\0';
1028         } else {
1029                 strncpy(str, buff, 6);
1030                 str[6] = '\0';
1031         }
1032
1033         val = simple_strtoul(str, &endp, 0);
1034
1035         *count = 0;
1036         if (val <= 0xffff)
1037                 *count = (ssize_t)(endp - str);
1038         if ((*count) && (len == *count+1) && (buff[*count] == '\n'))
1039                 *count += 1;
1040
1041         return (u16)val;
1042 }
1043
1044 /*
1045    NOTE 1: being inside one of the following methods implies that the v4l
1046            device exists for sure (see kobjects and reference counters)
1047    NOTE 2: buffers are PAGE_SIZE long
1048 */
1049
1050 static ssize_t sn9c102_show_reg(struct device* cd,
1051                                 struct device_attribute *attr, char* buf)
1052 {
1053         struct sn9c102_device* cam;
1054         ssize_t count;
1055
1056         if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1057                 return -ERESTARTSYS;
1058
1059         cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1060         if (!cam) {
1061                 mutex_unlock(&sn9c102_sysfs_lock);
1062                 return -ENODEV;
1063         }
1064
1065         count = sprintf(buf, "%u\n", cam->sysfs.reg);
1066
1067         mutex_unlock(&sn9c102_sysfs_lock);
1068
1069         return count;
1070 }
1071
1072
1073 static ssize_t
1074 sn9c102_store_reg(struct device* cd, struct device_attribute *attr,
1075                   const char* buf, size_t len)
1076 {
1077         struct sn9c102_device* cam;
1078         u16 index;
1079         ssize_t count;
1080
1081         if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1082                 return -ERESTARTSYS;
1083
1084         cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1085         if (!cam) {
1086                 mutex_unlock(&sn9c102_sysfs_lock);
1087                 return -ENODEV;
1088         }
1089
1090         index = sn9c102_strtou16(buf, len, &count);
1091         if (index >= ARRAY_SIZE(cam->reg) || !count) {
1092                 mutex_unlock(&sn9c102_sysfs_lock);
1093                 return -EINVAL;
1094         }
1095
1096         cam->sysfs.reg = index;
1097
1098         DBG(2, "Moved SN9C1XX register index to 0x%02X", cam->sysfs.reg);
1099         DBG(3, "Written bytes: %zd", count);
1100
1101         mutex_unlock(&sn9c102_sysfs_lock);
1102
1103         return count;
1104 }
1105
1106
1107 static ssize_t sn9c102_show_val(struct device* cd,
1108                                 struct device_attribute *attr, char* buf)
1109 {
1110         struct sn9c102_device* cam;
1111         ssize_t count;
1112         int val;
1113
1114         if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1115                 return -ERESTARTSYS;
1116
1117         cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1118         if (!cam) {
1119                 mutex_unlock(&sn9c102_sysfs_lock);
1120                 return -ENODEV;
1121         }
1122
1123         if ((val = sn9c102_read_reg(cam, cam->sysfs.reg)) < 0) {
1124                 mutex_unlock(&sn9c102_sysfs_lock);
1125                 return -EIO;
1126         }
1127
1128         count = sprintf(buf, "%d\n", val);
1129
1130         DBG(3, "Read bytes: %zd, value: %d", count, val);
1131
1132         mutex_unlock(&sn9c102_sysfs_lock);
1133
1134         return count;
1135 }
1136
1137
1138 static ssize_t
1139 sn9c102_store_val(struct device* cd, struct device_attribute *attr,
1140                   const char* buf, size_t len)
1141 {
1142         struct sn9c102_device* cam;
1143         u16 value;
1144         ssize_t count;
1145         int err;
1146
1147         if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1148                 return -ERESTARTSYS;
1149
1150         cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1151         if (!cam) {
1152                 mutex_unlock(&sn9c102_sysfs_lock);
1153                 return -ENODEV;
1154         }
1155
1156         value = sn9c102_strtou16(buf, len, &count);
1157         if (!count) {
1158                 mutex_unlock(&sn9c102_sysfs_lock);
1159                 return -EINVAL;
1160         }
1161
1162         err = sn9c102_write_reg(cam, value, cam->sysfs.reg);
1163         if (err) {
1164                 mutex_unlock(&sn9c102_sysfs_lock);
1165                 return -EIO;
1166         }
1167
1168         DBG(2, "Written SN9C1XX reg. 0x%02X, val. 0x%02X",
1169             cam->sysfs.reg, value);
1170         DBG(3, "Written bytes: %zd", count);
1171
1172         mutex_unlock(&sn9c102_sysfs_lock);
1173
1174         return count;
1175 }
1176
1177
1178 static ssize_t sn9c102_show_i2c_reg(struct device* cd,
1179                                     struct device_attribute *attr, char* buf)
1180 {
1181         struct sn9c102_device* cam;
1182         ssize_t count;
1183
1184         if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1185                 return -ERESTARTSYS;
1186
1187         cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1188         if (!cam) {
1189                 mutex_unlock(&sn9c102_sysfs_lock);
1190                 return -ENODEV;
1191         }
1192
1193         count = sprintf(buf, "%u\n", cam->sysfs.i2c_reg);
1194
1195         DBG(3, "Read bytes: %zd", count);
1196
1197         mutex_unlock(&sn9c102_sysfs_lock);
1198
1199         return count;
1200 }
1201
1202
1203 static ssize_t
1204 sn9c102_store_i2c_reg(struct device* cd, struct device_attribute *attr,
1205                       const char* buf, size_t len)
1206 {
1207         struct sn9c102_device* cam;
1208         u16 index;
1209         ssize_t count;
1210
1211         if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1212                 return -ERESTARTSYS;
1213
1214         cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1215         if (!cam) {
1216                 mutex_unlock(&sn9c102_sysfs_lock);
1217                 return -ENODEV;
1218         }
1219
1220         index = sn9c102_strtou16(buf, len, &count);
1221         if (!count) {
1222                 mutex_unlock(&sn9c102_sysfs_lock);
1223                 return -EINVAL;
1224         }
1225
1226         cam->sysfs.i2c_reg = index;
1227
1228         DBG(2, "Moved sensor register index to 0x%02X", cam->sysfs.i2c_reg);
1229         DBG(3, "Written bytes: %zd", count);
1230
1231         mutex_unlock(&sn9c102_sysfs_lock);
1232
1233         return count;
1234 }
1235
1236
1237 static ssize_t sn9c102_show_i2c_val(struct device* cd,
1238                                     struct device_attribute *attr, char* buf)
1239 {
1240         struct sn9c102_device* cam;
1241         ssize_t count;
1242         int val;
1243
1244         if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1245                 return -ERESTARTSYS;
1246
1247         cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1248         if (!cam) {
1249                 mutex_unlock(&sn9c102_sysfs_lock);
1250                 return -ENODEV;
1251         }
1252
1253         if (!(cam->sensor.sysfs_ops & SN9C102_I2C_READ)) {
1254                 mutex_unlock(&sn9c102_sysfs_lock);
1255                 return -ENOSYS;
1256         }
1257
1258         if ((val = sn9c102_i2c_read(cam, cam->sysfs.i2c_reg)) < 0) {
1259                 mutex_unlock(&sn9c102_sysfs_lock);
1260                 return -EIO;
1261         }
1262
1263         count = sprintf(buf, "%d\n", val);
1264
1265         DBG(3, "Read bytes: %zd, value: %d", count, val);
1266
1267         mutex_unlock(&sn9c102_sysfs_lock);
1268
1269         return count;
1270 }
1271
1272
1273 static ssize_t
1274 sn9c102_store_i2c_val(struct device* cd, struct device_attribute *attr,
1275                       const char* buf, size_t len)
1276 {
1277         struct sn9c102_device* cam;
1278         u16 value;
1279         ssize_t count;
1280         int err;
1281
1282         if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1283                 return -ERESTARTSYS;
1284
1285         cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1286         if (!cam) {
1287                 mutex_unlock(&sn9c102_sysfs_lock);
1288                 return -ENODEV;
1289         }
1290
1291         if (!(cam->sensor.sysfs_ops & SN9C102_I2C_WRITE)) {
1292                 mutex_unlock(&sn9c102_sysfs_lock);
1293                 return -ENOSYS;
1294         }
1295
1296         value = sn9c102_strtou16(buf, len, &count);
1297         if (!count) {
1298                 mutex_unlock(&sn9c102_sysfs_lock);
1299                 return -EINVAL;
1300         }
1301
1302         err = sn9c102_i2c_write(cam, cam->sysfs.i2c_reg, value);
1303         if (err) {
1304                 mutex_unlock(&sn9c102_sysfs_lock);
1305                 return -EIO;
1306         }
1307
1308         DBG(2, "Written sensor reg. 0x%02X, val. 0x%02X",
1309             cam->sysfs.i2c_reg, value);
1310         DBG(3, "Written bytes: %zd", count);
1311
1312         mutex_unlock(&sn9c102_sysfs_lock);
1313
1314         return count;
1315 }
1316
1317
1318 static ssize_t
1319 sn9c102_store_green(struct device* cd, struct device_attribute *attr,
1320                     const char* buf, size_t len)
1321 {
1322         struct sn9c102_device* cam;
1323         enum sn9c102_bridge bridge;
1324         ssize_t res = 0;
1325         u16 value;
1326         ssize_t count;
1327
1328         if (mutex_lock_interruptible(&sn9c102_sysfs_lock))
1329                 return -ERESTARTSYS;
1330
1331         cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1332         if (!cam) {
1333                 mutex_unlock(&sn9c102_sysfs_lock);
1334                 return -ENODEV;
1335         }
1336
1337         bridge = cam->bridge;
1338
1339         mutex_unlock(&sn9c102_sysfs_lock);
1340
1341         value = sn9c102_strtou16(buf, len, &count);
1342         if (!count)
1343                 return -EINVAL;
1344
1345         switch (bridge) {
1346         case BRIDGE_SN9C101:
1347         case BRIDGE_SN9C102:
1348                 if (value > 0x0f)
1349                         return -EINVAL;
1350                 if ((res = sn9c102_store_reg(cd, attr, "0x11", 4)) >= 0)
1351                         res = sn9c102_store_val(cd, attr, buf, len);
1352                 break;
1353         case BRIDGE_SN9C103:
1354         case BRIDGE_SN9C105:
1355         case BRIDGE_SN9C120:
1356                 if (value > 0x7f)
1357                         return -EINVAL;
1358                 if ((res = sn9c102_store_reg(cd, attr, "0x07", 4)) >= 0)
1359                         res = sn9c102_store_val(cd, attr, buf, len);
1360                 break;
1361         }
1362
1363         return res;
1364 }
1365
1366
1367 static ssize_t
1368 sn9c102_store_blue(struct device* cd, struct device_attribute *attr,
1369                    const char* buf, size_t len)
1370 {
1371         ssize_t res = 0;
1372         u16 value;
1373         ssize_t count;
1374
1375         value = sn9c102_strtou16(buf, len, &count);
1376         if (!count || value > 0x7f)
1377                 return -EINVAL;
1378
1379         if ((res = sn9c102_store_reg(cd, attr, "0x06", 4)) >= 0)
1380                 res = sn9c102_store_val(cd, attr, buf, len);
1381
1382         return res;
1383 }
1384
1385
1386 static ssize_t
1387 sn9c102_store_red(struct device* cd, struct device_attribute *attr,
1388                   const char* buf, size_t len)
1389 {
1390         ssize_t res = 0;
1391         u16 value;
1392         ssize_t count;
1393
1394         value = sn9c102_strtou16(buf, len, &count);
1395         if (!count || value > 0x7f)
1396                 return -EINVAL;
1397
1398         if ((res = sn9c102_store_reg(cd, attr, "0x05", 4)) >= 0)
1399                 res = sn9c102_store_val(cd, attr, buf, len);
1400
1401         return res;
1402 }
1403
1404
1405 static ssize_t sn9c102_show_frame_header(struct device* cd,
1406                                          struct device_attribute *attr,
1407                                          char* buf)
1408 {
1409         struct sn9c102_device* cam;
1410         ssize_t count;
1411
1412         cam = video_get_drvdata(container_of(cd, struct video_device, dev));
1413         if (!cam)
1414                 return -ENODEV;
1415
1416         count = sizeof(cam->sysfs.frame_header);
1417         memcpy(buf, cam->sysfs.frame_header, count);
1418
1419         DBG(3, "Frame header, read bytes: %zd", count);
1420
1421         return count;
1422 }
1423
1424
1425 static DEVICE_ATTR(reg, S_IRUGO | S_IWUSR, sn9c102_show_reg, sn9c102_store_reg);
1426 static DEVICE_ATTR(val, S_IRUGO | S_IWUSR, sn9c102_show_val, sn9c102_store_val);
1427 static DEVICE_ATTR(i2c_reg, S_IRUGO | S_IWUSR,
1428                    sn9c102_show_i2c_reg, sn9c102_store_i2c_reg);
1429 static DEVICE_ATTR(i2c_val, S_IRUGO | S_IWUSR,
1430                    sn9c102_show_i2c_val, sn9c102_store_i2c_val);
1431 static DEVICE_ATTR(green, S_IWUSR, NULL, sn9c102_store_green);
1432 static DEVICE_ATTR(blue, S_IWUSR, NULL, sn9c102_store_blue);
1433 static DEVICE_ATTR(red, S_IWUSR, NULL, sn9c102_store_red);
1434 static DEVICE_ATTR(frame_header, S_IRUGO, sn9c102_show_frame_header, NULL);
1435
1436
1437 static int sn9c102_create_sysfs(struct sn9c102_device* cam)
1438 {
1439         struct device *dev = &(cam->v4ldev->dev);
1440         int err = 0;
1441
1442         if ((err = device_create_file(dev, &dev_attr_reg)))
1443                 goto err_out;
1444         if ((err = device_create_file(dev, &dev_attr_val)))
1445                 goto err_reg;
1446         if ((err = device_create_file(dev, &dev_attr_frame_header)))
1447                 goto err_val;
1448
1449         if (cam->sensor.sysfs_ops) {
1450                 if ((err = device_create_file(dev, &dev_attr_i2c_reg)))
1451                         goto err_frame_header;
1452                 if ((err = device_create_file(dev, &dev_attr_i2c_val)))
1453                         goto err_i2c_reg;
1454         }
1455
1456         if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102) {
1457                 if ((err = device_create_file(dev, &dev_attr_green)))
1458                         goto err_i2c_val;
1459         } else {
1460                 if ((err = device_create_file(dev, &dev_attr_blue)))
1461                         goto err_i2c_val;
1462                 if ((err = device_create_file(dev, &dev_attr_red)))
1463                         goto err_blue;
1464         }
1465
1466         return 0;
1467
1468 err_blue:
1469         device_remove_file(dev, &dev_attr_blue);
1470 err_i2c_val:
1471         if (cam->sensor.sysfs_ops)
1472                 device_remove_file(dev, &dev_attr_i2c_val);
1473 err_i2c_reg:
1474         if (cam->sensor.sysfs_ops)
1475                 device_remove_file(dev, &dev_attr_i2c_reg);
1476 err_frame_header:
1477         device_remove_file(dev, &dev_attr_frame_header);
1478 err_val:
1479         device_remove_file(dev, &dev_attr_val);
1480 err_reg:
1481         device_remove_file(dev, &dev_attr_reg);
1482 err_out:
1483         return err;
1484 }
1485 #endif /* CONFIG_VIDEO_ADV_DEBUG */
1486
1487 /*****************************************************************************/
1488
1489 static int
1490 sn9c102_set_pix_format(struct sn9c102_device* cam, struct v4l2_pix_format* pix)
1491 {
1492         int err = 0;
1493
1494         if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X ||
1495             pix->pixelformat == V4L2_PIX_FMT_JPEG) {
1496                 switch (cam->bridge) {
1497                 case BRIDGE_SN9C101:
1498                 case BRIDGE_SN9C102:
1499                 case BRIDGE_SN9C103:
1500                         err += sn9c102_write_reg(cam, cam->reg[0x18] | 0x80,
1501                                                  0x18);
1502                         break;
1503                 case BRIDGE_SN9C105:
1504                 case BRIDGE_SN9C120:
1505                         err += sn9c102_write_reg(cam, cam->reg[0x18] & 0x7f,
1506                                                  0x18);
1507                         break;
1508                 }
1509         } else {
1510                 switch (cam->bridge) {
1511                 case BRIDGE_SN9C101:
1512                 case BRIDGE_SN9C102:
1513                 case BRIDGE_SN9C103:
1514                         err += sn9c102_write_reg(cam, cam->reg[0x18] & 0x7f,
1515                                                  0x18);
1516                         break;
1517                 case BRIDGE_SN9C105:
1518                 case BRIDGE_SN9C120:
1519                         err += sn9c102_write_reg(cam, cam->reg[0x18] | 0x80,
1520                                                  0x18);
1521                         break;
1522                 }
1523         }
1524
1525         return err ? -EIO : 0;
1526 }
1527
1528
1529 static int
1530 sn9c102_set_compression(struct sn9c102_device* cam,
1531                         struct v4l2_jpegcompression* compression)
1532 {
1533         int i, err = 0;
1534
1535         switch (cam->bridge) {
1536         case BRIDGE_SN9C101:
1537         case BRIDGE_SN9C102:
1538         case BRIDGE_SN9C103:
1539                 if (compression->quality == 0)
1540                         err += sn9c102_write_reg(cam, cam->reg[0x17] | 0x01,
1541                                                  0x17);
1542                 else if (compression->quality == 1)
1543                         err += sn9c102_write_reg(cam, cam->reg[0x17] & 0xfe,
1544                                                  0x17);
1545                 break;
1546         case BRIDGE_SN9C105:
1547         case BRIDGE_SN9C120:
1548                 if (compression->quality == 0) {
1549                         for (i = 0; i <= 63; i++) {
1550                                 err += sn9c102_write_reg(cam,
1551                                                          SN9C102_Y_QTABLE1[i],
1552                                                          0x100 + i);
1553                                 err += sn9c102_write_reg(cam,
1554                                                          SN9C102_UV_QTABLE1[i],
1555                                                          0x140 + i);
1556                         }
1557                         err += sn9c102_write_reg(cam, cam->reg[0x18] & 0xbf,
1558                                                  0x18);
1559                 } else if (compression->quality == 1) {
1560                         for (i = 0; i <= 63; i++) {
1561                                 err += sn9c102_write_reg(cam,
1562                                                          SN9C102_Y_QTABLE1[i],
1563                                                          0x100 + i);
1564                                 err += sn9c102_write_reg(cam,
1565                                                          SN9C102_UV_QTABLE1[i],
1566                                                          0x140 + i);
1567                         }
1568                         err += sn9c102_write_reg(cam, cam->reg[0x18] | 0x40,
1569                                                  0x18);
1570                 }
1571                 break;
1572         }
1573
1574         return err ? -EIO : 0;
1575 }
1576
1577
1578 static int sn9c102_set_scale(struct sn9c102_device* cam, u8 scale)
1579 {
1580         u8 r = 0;
1581         int err = 0;
1582
1583         if (scale == 1)
1584                 r = cam->reg[0x18] & 0xcf;
1585         else if (scale == 2) {
1586                 r = cam->reg[0x18] & 0xcf;
1587                 r |= 0x10;
1588         } else if (scale == 4)
1589                 r = cam->reg[0x18] | 0x20;
1590
1591         err += sn9c102_write_reg(cam, r, 0x18);
1592         if (err)
1593                 return -EIO;
1594
1595         PDBGG("Scaling factor: %u", scale);
1596
1597         return 0;
1598 }
1599
1600
1601 static int sn9c102_set_crop(struct sn9c102_device* cam, struct v4l2_rect* rect)
1602 {
1603         struct sn9c102_sensor* s = &cam->sensor;
1604         u8 h_start = (u8)(rect->left - s->cropcap.bounds.left),
1605            v_start = (u8)(rect->top - s->cropcap.bounds.top),
1606            h_size = (u8)(rect->width / 16),
1607            v_size = (u8)(rect->height / 16);
1608         int err = 0;
1609
1610         err += sn9c102_write_reg(cam, h_start, 0x12);
1611         err += sn9c102_write_reg(cam, v_start, 0x13);
1612         err += sn9c102_write_reg(cam, h_size, 0x15);
1613         err += sn9c102_write_reg(cam, v_size, 0x16);
1614         if (err)
1615                 return -EIO;
1616
1617         PDBGG("h_start, v_start, h_size, v_size, ho_size, vo_size "
1618               "%u %u %u %u", h_start, v_start, h_size, v_size);
1619
1620         return 0;
1621 }
1622
1623
1624 static int sn9c102_init(struct sn9c102_device* cam)
1625 {
1626         struct sn9c102_sensor* s = &cam->sensor;
1627         struct v4l2_control ctrl;
1628         struct v4l2_queryctrl *qctrl;
1629         struct v4l2_rect* rect;
1630         u8 i = 0;
1631         int err = 0;
1632
1633         if (!(cam->state & DEV_INITIALIZED)) {
1634                 mutex_init(&cam->open_mutex);
1635                 init_waitqueue_head(&cam->wait_open);
1636                 qctrl = s->qctrl;
1637                 rect = &(s->cropcap.defrect);
1638         } else { /* use current values */
1639                 qctrl = s->_qctrl;
1640                 rect = &(s->_rect);
1641         }
1642
1643         err += sn9c102_set_scale(cam, rect->width / s->pix_format.width);
1644         err += sn9c102_set_crop(cam, rect);
1645         if (err)
1646                 return err;
1647
1648         if (s->init) {
1649                 err = s->init(cam);
1650                 if (err) {
1651                         DBG(3, "Sensor initialization failed");
1652                         return err;
1653                 }
1654         }
1655
1656         if (!(cam->state & DEV_INITIALIZED))
1657                 if (cam->bridge == BRIDGE_SN9C101 ||
1658                     cam->bridge == BRIDGE_SN9C102 ||
1659                     cam->bridge == BRIDGE_SN9C103) {
1660                         if (s->pix_format.pixelformat == V4L2_PIX_FMT_JPEG)
1661                                 s->pix_format.pixelformat= V4L2_PIX_FMT_SBGGR8;
1662                         cam->compression.quality =  cam->reg[0x17] & 0x01 ?
1663                                                     0 : 1;
1664                 } else {
1665                         if (s->pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X)
1666                                 s->pix_format.pixelformat = V4L2_PIX_FMT_JPEG;
1667                         cam->compression.quality =  cam->reg[0x18] & 0x40 ?
1668                                                     0 : 1;
1669                         err += sn9c102_set_compression(cam, &cam->compression);
1670                 }
1671         else
1672                 err += sn9c102_set_compression(cam, &cam->compression);
1673         err += sn9c102_set_pix_format(cam, &s->pix_format);
1674         if (s->set_pix_format)
1675                 err += s->set_pix_format(cam, &s->pix_format);
1676         if (err)
1677                 return err;
1678
1679         if (s->pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X ||
1680             s->pix_format.pixelformat == V4L2_PIX_FMT_JPEG)
1681                 DBG(3, "Compressed video format is active, quality %d",
1682                     cam->compression.quality);
1683         else
1684                 DBG(3, "Uncompressed video format is active");
1685
1686         if (s->set_crop)
1687                 if ((err = s->set_crop(cam, rect))) {
1688                         DBG(3, "set_crop() failed");
1689                         return err;
1690                 }
1691
1692         if (s->set_ctrl) {
1693                 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1694                         if (s->qctrl[i].id != 0 &&
1695                             !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) {
1696                                 ctrl.id = s->qctrl[i].id;
1697                                 ctrl.value = qctrl[i].default_value;
1698                                 err = s->set_ctrl(cam, &ctrl);
1699                                 if (err) {
1700                                         DBG(3, "Set %s control failed",
1701                                             s->qctrl[i].name);
1702                                         return err;
1703                                 }
1704                                 DBG(3, "Image sensor supports '%s' control",
1705                                     s->qctrl[i].name);
1706                         }
1707         }
1708
1709         if (!(cam->state & DEV_INITIALIZED)) {
1710                 mutex_init(&cam->fileop_mutex);
1711                 spin_lock_init(&cam->queue_lock);
1712                 init_waitqueue_head(&cam->wait_frame);
1713                 init_waitqueue_head(&cam->wait_stream);
1714                 cam->nreadbuffers = 2;
1715                 memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl));
1716                 memcpy(&(s->_rect), &(s->cropcap.defrect),
1717                        sizeof(struct v4l2_rect));
1718                 cam->state |= DEV_INITIALIZED;
1719         }
1720
1721         DBG(2, "Initialization succeeded");
1722         return 0;
1723 }
1724
1725 /*****************************************************************************/
1726
1727 static void sn9c102_release_resources(struct kref *kref)
1728 {
1729         struct sn9c102_device *cam;
1730
1731         mutex_lock(&sn9c102_sysfs_lock);
1732
1733         cam = container_of(kref, struct sn9c102_device, kref);
1734
1735         DBG(2, "V4L2 device %s deregistered",
1736             video_device_node_name(cam->v4ldev));
1737         video_set_drvdata(cam->v4ldev, NULL);
1738         video_unregister_device(cam->v4ldev);
1739         usb_put_dev(cam->usbdev);
1740         kfree(cam->control_buffer);
1741         kfree(cam);
1742
1743         mutex_unlock(&sn9c102_sysfs_lock);
1744
1745 }
1746
1747
1748 static int sn9c102_open(struct file *filp)
1749 {
1750         struct sn9c102_device* cam;
1751         int err = 0;
1752
1753         /*
1754            A read_trylock() in open() is the only safe way to prevent race
1755            conditions with disconnect(), one close() and multiple (not
1756            necessarily simultaneous) attempts to open(). For example, it
1757            prevents from waiting for a second access, while the device
1758            structure is being deallocated, after a possible disconnect() and
1759            during a following close() holding the write lock: given that, after
1760            this deallocation, no access will be possible anymore, using the
1761            non-trylock version would have let open() gain the access to the
1762            device structure improperly.
1763            For this reason the lock must also not be per-device.
1764         */
1765         if (!down_read_trylock(&sn9c102_dev_lock))
1766                 return -ERESTARTSYS;
1767
1768         cam = video_drvdata(filp);
1769
1770         if (wait_for_completion_interruptible(&cam->probe)) {
1771                 up_read(&sn9c102_dev_lock);
1772                 return -ERESTARTSYS;
1773         }
1774
1775         kref_get(&cam->kref);
1776
1777         /*
1778             Make sure to isolate all the simultaneous opens.
1779         */
1780         if (mutex_lock_interruptible(&cam->open_mutex)) {
1781                 kref_put(&cam->kref, sn9c102_release_resources);
1782                 up_read(&sn9c102_dev_lock);
1783                 return -ERESTARTSYS;
1784         }
1785
1786         if (cam->state & DEV_DISCONNECTED) {
1787                 DBG(1, "Device not present");
1788                 err = -ENODEV;
1789                 goto out;
1790         }
1791
1792         if (cam->users) {
1793                 DBG(2, "Device %s is already in use",
1794                     video_device_node_name(cam->v4ldev));
1795                 DBG(3, "Simultaneous opens are not supported");
1796                 /*
1797                    open() must follow the open flags and should block
1798                    eventually while the device is in use.
1799                 */
1800                 if ((filp->f_flags & O_NONBLOCK) ||
1801                     (filp->f_flags & O_NDELAY)) {
1802                         err = -EWOULDBLOCK;
1803                         goto out;
1804                 }
1805                 DBG(2, "A blocking open() has been requested. Wait for the "
1806                        "device to be released...");
1807                 up_read(&sn9c102_dev_lock);
1808                 /*
1809                    We will not release the "open_mutex" lock, so that only one
1810                    process can be in the wait queue below. This way the process
1811                    will be sleeping while holding the lock, without losing its
1812                    priority after any wake_up().
1813                 */
1814                 err = wait_event_interruptible_exclusive(cam->wait_open,
1815                                                 (cam->state & DEV_DISCONNECTED)
1816                                                          || !cam->users);
1817                 down_read(&sn9c102_dev_lock);
1818                 if (err)
1819                         goto out;
1820                 if (cam->state & DEV_DISCONNECTED) {
1821                         err = -ENODEV;
1822                         goto out;
1823                 }
1824         }
1825
1826         if (cam->state & DEV_MISCONFIGURED) {
1827                 err = sn9c102_init(cam);
1828                 if (err) {
1829                         DBG(1, "Initialization failed again. "
1830                                "I will retry on next open().");
1831                         goto out;
1832                 }
1833                 cam->state &= ~DEV_MISCONFIGURED;
1834         }
1835
1836         if ((err = sn9c102_start_transfer(cam)))
1837                 goto out;
1838
1839         filp->private_data = cam;
1840         cam->users++;
1841         cam->io = IO_NONE;
1842         cam->stream = STREAM_OFF;
1843         cam->nbuffers = 0;
1844         cam->frame_count = 0;
1845         sn9c102_empty_framequeues(cam);
1846
1847         DBG(3, "Video device %s is open", video_device_node_name(cam->v4ldev));
1848
1849 out:
1850         mutex_unlock(&cam->open_mutex);
1851         if (err)
1852                 kref_put(&cam->kref, sn9c102_release_resources);
1853
1854         up_read(&sn9c102_dev_lock);
1855         return err;
1856 }
1857
1858
1859 static int sn9c102_release(struct file *filp)
1860 {
1861         struct sn9c102_device* cam;
1862
1863         down_write(&sn9c102_dev_lock);
1864
1865         cam = video_drvdata(filp);
1866
1867         sn9c102_stop_transfer(cam);
1868         sn9c102_release_buffers(cam);
1869         cam->users--;
1870         wake_up_interruptible_nr(&cam->wait_open, 1);
1871
1872         DBG(3, "Video device %s closed", video_device_node_name(cam->v4ldev));
1873
1874         kref_put(&cam->kref, sn9c102_release_resources);
1875
1876         up_write(&sn9c102_dev_lock);
1877
1878         return 0;
1879 }
1880
1881
1882 static ssize_t
1883 sn9c102_read(struct file* filp, char __user * buf, size_t count, loff_t* f_pos)
1884 {
1885         struct sn9c102_device *cam = video_drvdata(filp);
1886         struct sn9c102_frame_t* f, * i;
1887         unsigned long lock_flags;
1888         long timeout;
1889         int err = 0;
1890
1891         if (mutex_lock_interruptible(&cam->fileop_mutex))
1892                 return -ERESTARTSYS;
1893
1894         if (cam->state & DEV_DISCONNECTED) {
1895                 DBG(1, "Device not present");
1896                 mutex_unlock(&cam->fileop_mutex);
1897                 return -ENODEV;
1898         }
1899
1900         if (cam->state & DEV_MISCONFIGURED) {
1901                 DBG(1, "The camera is misconfigured. Close and open it "
1902                        "again.");
1903                 mutex_unlock(&cam->fileop_mutex);
1904                 return -EIO;
1905         }
1906
1907         if (cam->io == IO_MMAP) {
1908                 DBG(3, "Close and open the device again to choose "
1909                        "the read method");
1910                 mutex_unlock(&cam->fileop_mutex);
1911                 return -EBUSY;
1912         }
1913
1914         if (cam->io == IO_NONE) {
1915                 if (!sn9c102_request_buffers(cam,cam->nreadbuffers, IO_READ)) {
1916                         DBG(1, "read() failed, not enough memory");
1917                         mutex_unlock(&cam->fileop_mutex);
1918                         return -ENOMEM;
1919                 }
1920                 cam->io = IO_READ;
1921                 cam->stream = STREAM_ON;
1922         }
1923
1924         if (list_empty(&cam->inqueue)) {
1925                 if (!list_empty(&cam->outqueue))
1926                         sn9c102_empty_framequeues(cam);
1927                 sn9c102_queue_unusedframes(cam);
1928         }
1929
1930         if (!count) {
1931                 mutex_unlock(&cam->fileop_mutex);
1932                 return 0;
1933         }
1934
1935         if (list_empty(&cam->outqueue)) {
1936                 if (filp->f_flags & O_NONBLOCK) {
1937                         mutex_unlock(&cam->fileop_mutex);
1938                         return -EAGAIN;
1939                 }
1940                 if (!cam->module_param.frame_timeout) {
1941                         err = wait_event_interruptible
1942                               ( cam->wait_frame,
1943                                 (!list_empty(&cam->outqueue)) ||
1944                                 (cam->state & DEV_DISCONNECTED) ||
1945                                 (cam->state & DEV_MISCONFIGURED) );
1946                         if (err) {
1947                                 mutex_unlock(&cam->fileop_mutex);
1948                                 return err;
1949                         }
1950                 } else {
1951                         timeout = wait_event_interruptible_timeout
1952                                   ( cam->wait_frame,
1953                                     (!list_empty(&cam->outqueue)) ||
1954                                     (cam->state & DEV_DISCONNECTED) ||
1955                                     (cam->state & DEV_MISCONFIGURED),
1956                                     msecs_to_jiffies(
1957                                         cam->module_param.frame_timeout * 1000
1958                                     )
1959                                   );
1960                         if (timeout < 0) {
1961                                 mutex_unlock(&cam->fileop_mutex);
1962                                 return timeout;
1963                         } else if (timeout == 0 &&
1964                                    !(cam->state & DEV_DISCONNECTED)) {
1965                                 DBG(1, "Video frame timeout elapsed");
1966                                 mutex_unlock(&cam->fileop_mutex);
1967                                 return -EIO;
1968                         }
1969                 }
1970                 if (cam->state & DEV_DISCONNECTED) {
1971                         mutex_unlock(&cam->fileop_mutex);
1972                         return -ENODEV;
1973                 }
1974                 if (cam->state & DEV_MISCONFIGURED) {
1975                         mutex_unlock(&cam->fileop_mutex);
1976                         return -EIO;
1977                 }
1978         }
1979
1980         f = list_entry(cam->outqueue.prev, struct sn9c102_frame_t, frame);
1981
1982         if (count > f->buf.bytesused)
1983                 count = f->buf.bytesused;
1984
1985         if (copy_to_user(buf, f->bufmem, count)) {
1986                 err = -EFAULT;
1987                 goto exit;
1988         }
1989         *f_pos += count;
1990
1991 exit:
1992         spin_lock_irqsave(&cam->queue_lock, lock_flags);
1993         list_for_each_entry(i, &cam->outqueue, frame)
1994                 i->state = F_UNUSED;
1995         INIT_LIST_HEAD(&cam->outqueue);
1996         spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1997
1998         sn9c102_queue_unusedframes(cam);
1999
2000         PDBGG("Frame #%lu, bytes read: %zu",
2001               (unsigned long)f->buf.index, count);
2002
2003         mutex_unlock(&cam->fileop_mutex);
2004
2005         return count;
2006 }
2007
2008
2009 static unsigned int sn9c102_poll(struct file *filp, poll_table *wait)
2010 {
2011         struct sn9c102_device *cam = video_drvdata(filp);
2012         struct sn9c102_frame_t* f;
2013         unsigned long lock_flags;
2014         unsigned int mask = 0;
2015
2016         if (mutex_lock_interruptible(&cam->fileop_mutex))
2017                 return POLLERR;
2018
2019         if (cam->state & DEV_DISCONNECTED) {
2020                 DBG(1, "Device not present");
2021                 goto error;
2022         }
2023
2024         if (cam->state & DEV_MISCONFIGURED) {
2025                 DBG(1, "The camera is misconfigured. Close and open it "
2026                        "again.");
2027                 goto error;
2028         }
2029
2030         if (cam->io == IO_NONE) {
2031                 if (!sn9c102_request_buffers(cam, cam->nreadbuffers,
2032                                              IO_READ)) {
2033                         DBG(1, "poll() failed, not enough memory");
2034                         goto error;
2035                 }
2036                 cam->io = IO_READ;
2037                 cam->stream = STREAM_ON;
2038         }
2039
2040         if (cam->io == IO_READ) {
2041                 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2042                 list_for_each_entry(f, &cam->outqueue, frame)
2043                         f->state = F_UNUSED;
2044                 INIT_LIST_HEAD(&cam->outqueue);
2045                 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2046                 sn9c102_queue_unusedframes(cam);
2047         }
2048
2049         poll_wait(filp, &cam->wait_frame, wait);
2050
2051         if (!list_empty(&cam->outqueue))
2052                 mask |= POLLIN | POLLRDNORM;
2053
2054         mutex_unlock(&cam->fileop_mutex);
2055
2056         return mask;
2057
2058 error:
2059         mutex_unlock(&cam->fileop_mutex);
2060         return POLLERR;
2061 }
2062
2063
2064 static void sn9c102_vm_open(struct vm_area_struct* vma)
2065 {
2066         struct sn9c102_frame_t* f = vma->vm_private_data;
2067         f->vma_use_count++;
2068 }
2069
2070
2071 static void sn9c102_vm_close(struct vm_area_struct* vma)
2072 {
2073         /* NOTE: buffers are not freed here */
2074         struct sn9c102_frame_t* f = vma->vm_private_data;
2075         f->vma_use_count--;
2076 }
2077
2078
2079 static const struct vm_operations_struct sn9c102_vm_ops = {
2080         .open = sn9c102_vm_open,
2081         .close = sn9c102_vm_close,
2082 };
2083
2084
2085 static int sn9c102_mmap(struct file* filp, struct vm_area_struct *vma)
2086 {
2087         struct sn9c102_device *cam = video_drvdata(filp);
2088         unsigned long size = vma->vm_end - vma->vm_start,
2089                       start = vma->vm_start;
2090         void *pos;
2091         u32 i;
2092
2093         if (mutex_lock_interruptible(&cam->fileop_mutex))
2094                 return -ERESTARTSYS;
2095
2096         if (cam->state & DEV_DISCONNECTED) {
2097                 DBG(1, "Device not present");
2098                 mutex_unlock(&cam->fileop_mutex);
2099                 return -ENODEV;
2100         }
2101
2102         if (cam->state & DEV_MISCONFIGURED) {
2103                 DBG(1, "The camera is misconfigured. Close and open it "
2104                        "again.");
2105                 mutex_unlock(&cam->fileop_mutex);
2106                 return -EIO;
2107         }
2108
2109         if (!(vma->vm_flags & (VM_WRITE | VM_READ))) {
2110                 mutex_unlock(&cam->fileop_mutex);
2111                 return -EACCES;
2112         }
2113
2114         if (cam->io != IO_MMAP ||
2115             size != PAGE_ALIGN(cam->frame[0].buf.length)) {
2116                 mutex_unlock(&cam->fileop_mutex);
2117                 return -EINVAL;
2118         }
2119
2120         for (i = 0; i < cam->nbuffers; i++) {
2121                 if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
2122                         break;
2123         }
2124         if (i == cam->nbuffers) {
2125                 mutex_unlock(&cam->fileop_mutex);
2126                 return -EINVAL;
2127         }
2128
2129         vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
2130
2131         pos = cam->frame[i].bufmem;
2132         while (size > 0) { /* size is page-aligned */
2133                 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
2134                         mutex_unlock(&cam->fileop_mutex);
2135                         return -EAGAIN;
2136                 }
2137                 start += PAGE_SIZE;
2138                 pos += PAGE_SIZE;
2139                 size -= PAGE_SIZE;
2140         }
2141
2142         vma->vm_ops = &sn9c102_vm_ops;
2143         vma->vm_private_data = &cam->frame[i];
2144         sn9c102_vm_open(vma);
2145
2146         mutex_unlock(&cam->fileop_mutex);
2147
2148         return 0;
2149 }
2150
2151 /*****************************************************************************/
2152
2153 static int
2154 sn9c102_vidioc_querycap(struct sn9c102_device* cam, void __user * arg)
2155 {
2156         struct v4l2_capability cap = {
2157                 .driver = "sn9c102",
2158                 .version = LINUX_VERSION_CODE,
2159                 .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
2160                                 V4L2_CAP_STREAMING,
2161         };
2162
2163         strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
2164         if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
2165                 strlcpy(cap.bus_info, dev_name(&cam->usbdev->dev),
2166                         sizeof(cap.bus_info));
2167
2168         if (copy_to_user(arg, &cap, sizeof(cap)))
2169                 return -EFAULT;
2170
2171         return 0;
2172 }
2173
2174
2175 static int
2176 sn9c102_vidioc_enuminput(struct sn9c102_device* cam, void __user * arg)
2177 {
2178         struct v4l2_input i;
2179
2180         if (copy_from_user(&i, arg, sizeof(i)))
2181                 return -EFAULT;
2182
2183         if (i.index)
2184                 return -EINVAL;
2185
2186         memset(&i, 0, sizeof(i));
2187         strcpy(i.name, "Camera");
2188         i.type = V4L2_INPUT_TYPE_CAMERA;
2189         i.capabilities = V4L2_IN_CAP_STD;
2190
2191         if (copy_to_user(arg, &i, sizeof(i)))
2192                 return -EFAULT;
2193
2194         return 0;
2195 }
2196
2197
2198 static int
2199 sn9c102_vidioc_g_input(struct sn9c102_device* cam, void __user * arg)
2200 {
2201         int index = 0;
2202
2203         if (copy_to_user(arg, &index, sizeof(index)))
2204                 return -EFAULT;
2205
2206         return 0;
2207 }
2208
2209
2210 static int
2211 sn9c102_vidioc_s_input(struct sn9c102_device* cam, void __user * arg)
2212 {
2213         int index;
2214
2215         if (copy_from_user(&index, arg, sizeof(index)))
2216                 return -EFAULT;
2217
2218         if (index != 0)
2219                 return -EINVAL;
2220
2221         return 0;
2222 }
2223
2224
2225 static int
2226 sn9c102_vidioc_query_ctrl(struct sn9c102_device* cam, void __user * arg)
2227 {
2228         struct sn9c102_sensor* s = &cam->sensor;
2229         struct v4l2_queryctrl qc;
2230         u8 i;
2231
2232         if (copy_from_user(&qc, arg, sizeof(qc)))
2233                 return -EFAULT;
2234
2235         for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
2236                 if (qc.id && qc.id == s->qctrl[i].id) {
2237                         memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
2238                         if (copy_to_user(arg, &qc, sizeof(qc)))
2239                                 return -EFAULT;
2240                         return 0;
2241                 }
2242
2243         return -EINVAL;
2244 }
2245
2246
2247 static int
2248 sn9c102_vidioc_g_ctrl(struct sn9c102_device* cam, void __user * arg)
2249 {
2250         struct sn9c102_sensor* s = &cam->sensor;
2251         struct v4l2_control ctrl;
2252         int err = 0;
2253         u8 i;
2254
2255         if (!s->get_ctrl && !s->set_ctrl)
2256                 return -EINVAL;
2257
2258         if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
2259                 return -EFAULT;
2260
2261         if (!s->get_ctrl) {
2262                 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
2263                         if (ctrl.id && ctrl.id == s->qctrl[i].id) {
2264                                 ctrl.value = s->_qctrl[i].default_value;
2265                                 goto exit;
2266                         }
2267                 return -EINVAL;
2268         } else
2269                 err = s->get_ctrl(cam, &ctrl);
2270
2271 exit:
2272         if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
2273                 return -EFAULT;
2274
2275         PDBGG("VIDIOC_G_CTRL: id %lu, value %lu",
2276               (unsigned long)ctrl.id, (unsigned long)ctrl.value);
2277
2278         return err;
2279 }
2280
2281
2282 static int
2283 sn9c102_vidioc_s_ctrl(struct sn9c102_device* cam, void __user * arg)
2284 {
2285         struct sn9c102_sensor* s = &cam->sensor;
2286         struct v4l2_control ctrl;
2287         u8 i;
2288         int err = 0;
2289
2290         if (!s->set_ctrl)
2291                 return -EINVAL;
2292
2293         if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
2294                 return -EFAULT;
2295
2296         for (i = 0; i < ARRAY_SIZE(s->qctrl); i++) {
2297                 if (ctrl.id == s->qctrl[i].id) {
2298                         if (s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)
2299                                 return -EINVAL;
2300                         if (ctrl.value < s->qctrl[i].minimum ||
2301                             ctrl.value > s->qctrl[i].maximum)
2302                                 return -ERANGE;
2303                         ctrl.value -= ctrl.value % s->qctrl[i].step;
2304                         break;
2305                 }
2306         }
2307         if (i == ARRAY_SIZE(s->qctrl))
2308                 return -EINVAL;
2309         if ((err = s->set_ctrl(cam, &ctrl)))
2310                 return err;
2311
2312         s->_qctrl[i].default_value = ctrl.value;
2313
2314         PDBGG("VIDIOC_S_CTRL: id %lu, value %lu",
2315               (unsigned long)ctrl.id, (unsigned long)ctrl.value);
2316
2317         return 0;
2318 }
2319
2320
2321 static int
2322 sn9c102_vidioc_cropcap(struct sn9c102_device* cam, void __user * arg)
2323 {
2324         struct v4l2_cropcap* cc = &(cam->sensor.cropcap);
2325
2326         cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2327         cc->pixelaspect.numerator = 1;
2328         cc->pixelaspect.denominator = 1;
2329
2330         if (copy_to_user(arg, cc, sizeof(*cc)))
2331                 return -EFAULT;
2332
2333         return 0;
2334 }
2335
2336
2337 static int
2338 sn9c102_vidioc_g_crop(struct sn9c102_device* cam, void __user * arg)
2339 {
2340         struct sn9c102_sensor* s = &cam->sensor;
2341         struct v4l2_crop crop = {
2342                 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
2343         };
2344
2345         memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
2346
2347         if (copy_to_user(arg, &crop, sizeof(crop)))
2348                 return -EFAULT;
2349
2350         return 0;
2351 }
2352
2353
2354 static int
2355 sn9c102_vidioc_s_crop(struct sn9c102_device* cam, void __user * arg)
2356 {
2357         struct sn9c102_sensor* s = &cam->sensor;
2358         struct v4l2_crop crop;
2359         struct v4l2_rect* rect;
2360         struct v4l2_rect* bounds = &(s->cropcap.bounds);
2361         struct v4l2_pix_format* pix_format = &(s->pix_format);
2362         u8 scale;
2363         const enum sn9c102_stream_state stream = cam->stream;
2364         const u32 nbuffers = cam->nbuffers;
2365         u32 i;
2366         int err = 0;
2367
2368         if (copy_from_user(&crop, arg, sizeof(crop)))
2369                 return -EFAULT;
2370
2371         rect = &(crop.c);
2372
2373         if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2374                 return -EINVAL;
2375
2376         if (cam->module_param.force_munmap)
2377                 for (i = 0; i < cam->nbuffers; i++)
2378                         if (cam->frame[i].vma_use_count) {
2379                                 DBG(3, "VIDIOC_S_CROP failed. "
2380                                        "Unmap the buffers first.");
2381                                 return -EBUSY;
2382                         }
2383
2384         /* Preserve R,G or B origin */
2385         rect->left = (s->_rect.left & 1L) ? rect->left | 1L : rect->left & ~1L;
2386         rect->top = (s->_rect.top & 1L) ? rect->top | 1L : rect->top & ~1L;
2387
2388         if (rect->width < 16)
2389                 rect->width = 16;
2390         if (rect->height < 16)
2391                 rect->height = 16;
2392         if (rect->width > bounds->width)
2393                 rect->width = bounds->width;
2394         if (rect->height > bounds->height)
2395                 rect->height = bounds->height;
2396         if (rect->left < bounds->left)
2397                 rect->left = bounds->left;
2398         if (rect->top < bounds->top)
2399                 rect->top = bounds->top;
2400         if (rect->left + rect->width > bounds->left + bounds->width)
2401                 rect->left = bounds->left+bounds->width - rect->width;
2402         if (rect->top + rect->height > bounds->top + bounds->height)
2403                 rect->top = bounds->top+bounds->height - rect->height;
2404
2405         rect->width &= ~15L;
2406         rect->height &= ~15L;
2407
2408         if (SN9C102_PRESERVE_IMGSCALE) {
2409                 /* Calculate the actual scaling factor */
2410                 u32 a, b;
2411                 a = rect->width * rect->height;
2412                 b = pix_format->width * pix_format->height;
2413                 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
2414         } else
2415                 scale = 1;
2416
2417         if (cam->stream == STREAM_ON)
2418                 if ((err = sn9c102_stream_interrupt(cam)))
2419                         return err;
2420
2421         if (copy_to_user(arg, &crop, sizeof(crop))) {
2422                 cam->stream = stream;
2423                 return -EFAULT;
2424         }
2425
2426         if (cam->module_param.force_munmap || cam->io == IO_READ)
2427                 sn9c102_release_buffers(cam);
2428
2429         err = sn9c102_set_crop(cam, rect);
2430         if (s->set_crop)
2431                 err += s->set_crop(cam, rect);
2432         err += sn9c102_set_scale(cam, scale);
2433
2434         if (err) { /* atomic, no rollback in ioctl() */
2435                 cam->state |= DEV_MISCONFIGURED;
2436                 DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
2437                        "use the camera, close and open %s again.",
2438                     video_device_node_name(cam->v4ldev));
2439                 return -EIO;
2440         }
2441
2442         s->pix_format.width = rect->width/scale;
2443         s->pix_format.height = rect->height/scale;
2444         memcpy(&(s->_rect), rect, sizeof(*rect));
2445
2446         if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
2447             nbuffers != sn9c102_request_buffers(cam, nbuffers, cam->io)) {
2448                 cam->state |= DEV_MISCONFIGURED;
2449                 DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
2450                        "use the camera, close and open %s again.",
2451                     video_device_node_name(cam->v4ldev));
2452                 return -ENOMEM;
2453         }
2454
2455         if (cam->io == IO_READ)
2456                 sn9c102_empty_framequeues(cam);
2457         else if (cam->module_param.force_munmap)
2458                 sn9c102_requeue_outqueue(cam);
2459
2460         cam->stream = stream;
2461
2462         return 0;
2463 }
2464
2465
2466 static int
2467 sn9c102_vidioc_enum_framesizes(struct sn9c102_device* cam, void __user * arg)
2468 {
2469         struct v4l2_frmsizeenum frmsize;
2470
2471         if (copy_from_user(&frmsize, arg, sizeof(frmsize)))
2472                 return -EFAULT;
2473
2474         if (frmsize.index != 0)
2475                 return -EINVAL;
2476
2477         switch (cam->bridge) {
2478         case BRIDGE_SN9C101:
2479         case BRIDGE_SN9C102:
2480         case BRIDGE_SN9C103:
2481                 if (frmsize.pixel_format != V4L2_PIX_FMT_SN9C10X &&
2482                     frmsize.pixel_format != V4L2_PIX_FMT_SBGGR8)
2483                         return -EINVAL;
2484         case BRIDGE_SN9C105:
2485         case BRIDGE_SN9C120:
2486                 if (frmsize.pixel_format != V4L2_PIX_FMT_JPEG &&
2487                     frmsize.pixel_format != V4L2_PIX_FMT_SBGGR8)
2488                         return -EINVAL;
2489         }
2490
2491         frmsize.type = V4L2_FRMSIZE_TYPE_STEPWISE;
2492         frmsize.stepwise.min_width = frmsize.stepwise.step_width = 16;
2493         frmsize.stepwise.min_height = frmsize.stepwise.step_height = 16;
2494         frmsize.stepwise.max_width = cam->sensor.cropcap.bounds.width;
2495         frmsize.stepwise.max_height = cam->sensor.cropcap.bounds.height;
2496         memset(&frmsize.reserved, 0, sizeof(frmsize.reserved));
2497
2498         if (copy_to_user(arg, &frmsize, sizeof(frmsize)))
2499                 return -EFAULT;
2500
2501         return 0;
2502 }
2503
2504
2505 static int
2506 sn9c102_vidioc_enum_fmt(struct sn9c102_device* cam, void __user * arg)
2507 {
2508         struct v4l2_fmtdesc fmtd;
2509
2510         if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
2511                 return -EFAULT;
2512
2513         if (fmtd.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2514                 return -EINVAL;
2515
2516         if (fmtd.index == 0) {
2517                 strcpy(fmtd.description, "bayer rgb");
2518                 fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8;
2519         } else if (fmtd.index == 1) {
2520                 switch (cam->bridge) {
2521                 case BRIDGE_SN9C101:
2522                 case BRIDGE_SN9C102:
2523                 case BRIDGE_SN9C103:
2524                         strcpy(fmtd.description, "compressed");
2525                         fmtd.pixelformat = V4L2_PIX_FMT_SN9C10X;
2526                         break;
2527                 case BRIDGE_SN9C105:
2528                 case BRIDGE_SN9C120:
2529                         strcpy(fmtd.description, "JPEG");
2530                         fmtd.pixelformat = V4L2_PIX_FMT_JPEG;
2531                         break;
2532                 }
2533                 fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
2534         } else
2535                 return -EINVAL;
2536
2537         fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2538         memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
2539
2540         if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
2541                 return -EFAULT;
2542
2543         return 0;
2544 }
2545
2546
2547 static int
2548 sn9c102_vidioc_g_fmt(struct sn9c102_device* cam, void __user * arg)
2549 {
2550         struct v4l2_format format;
2551         struct v4l2_pix_format* pfmt = &(cam->sensor.pix_format);
2552
2553         if (copy_from_user(&format, arg, sizeof(format)))
2554                 return -EFAULT;
2555
2556         if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2557                 return -EINVAL;
2558
2559         pfmt->colorspace = (pfmt->pixelformat == V4L2_PIX_FMT_JPEG) ?
2560                            V4L2_COLORSPACE_JPEG : V4L2_COLORSPACE_SRGB;
2561         pfmt->bytesperline = (pfmt->pixelformat == V4L2_PIX_FMT_SN9C10X ||
2562                               pfmt->pixelformat == V4L2_PIX_FMT_JPEG)
2563                              ? 0 : (pfmt->width * pfmt->priv) / 8;
2564         pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
2565         pfmt->field = V4L2_FIELD_NONE;
2566         memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
2567
2568         if (copy_to_user(arg, &format, sizeof(format)))
2569                 return -EFAULT;
2570
2571         return 0;
2572 }
2573
2574
2575 static int
2576 sn9c102_vidioc_try_s_fmt(struct sn9c102_device* cam, unsigned int cmd,
2577                          void __user * arg)
2578 {
2579         struct sn9c102_sensor* s = &cam->sensor;
2580         struct v4l2_format format;
2581         struct v4l2_pix_format* pix;
2582         struct v4l2_pix_format* pfmt = &(s->pix_format);
2583         struct v4l2_rect* bounds = &(s->cropcap.bounds);
2584         struct v4l2_rect rect;
2585         u8 scale;
2586         const enum sn9c102_stream_state stream = cam->stream;
2587         const u32 nbuffers = cam->nbuffers;
2588         u32 i;
2589         int err = 0;
2590
2591         if (copy_from_user(&format, arg, sizeof(format)))
2592                 return -EFAULT;
2593
2594         pix = &(format.fmt.pix);
2595
2596         if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2597                 return -EINVAL;
2598
2599         memcpy(&rect, &(s->_rect), sizeof(rect));
2600
2601         { /* calculate the actual scaling factor */
2602                 u32 a, b;
2603                 a = rect.width * rect.height;
2604                 b = pix->width * pix->height;
2605                 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
2606         }
2607
2608         rect.width = scale * pix->width;
2609         rect.height = scale * pix->height;
2610
2611         if (rect.width < 16)
2612                 rect.width = 16;
2613         if (rect.height < 16)
2614                 rect.height = 16;
2615         if (rect.width > bounds->left + bounds->width - rect.left)
2616                 rect.width = bounds->left + bounds->width - rect.left;
2617         if (rect.height > bounds->top + bounds->height - rect.top)
2618                 rect.height = bounds->top + bounds->height - rect.top;
2619
2620         rect.width &= ~15L;
2621         rect.height &= ~15L;
2622
2623         { /* adjust the scaling factor */
2624                 u32 a, b;
2625                 a = rect.width * rect.height;
2626                 b = pix->width * pix->height;
2627                 scale = b ? (u8)((a / b) < 4 ? 1 : ((a / b) < 16 ? 2 : 4)) : 1;
2628         }
2629
2630         pix->width = rect.width / scale;
2631         pix->height = rect.height / scale;
2632
2633         switch (cam->bridge) {
2634         case BRIDGE_SN9C101:
2635         case BRIDGE_SN9C102:
2636         case BRIDGE_SN9C103:
2637                 if (pix->pixelformat != V4L2_PIX_FMT_SN9C10X &&
2638                     pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
2639                         pix->pixelformat = pfmt->pixelformat;
2640                 break;
2641         case BRIDGE_SN9C105:
2642         case BRIDGE_SN9C120:
2643                 if (pix->pixelformat != V4L2_PIX_FMT_JPEG &&
2644                     pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
2645                         pix->pixelformat = pfmt->pixelformat;
2646                 break;
2647         }
2648         pix->priv = pfmt->priv; /* bpp */
2649         pix->colorspace = (pix->pixelformat == V4L2_PIX_FMT_JPEG) ?
2650                           V4L2_COLORSPACE_JPEG : V4L2_COLORSPACE_SRGB;
2651         pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_SN9C10X ||
2652                              pix->pixelformat == V4L2_PIX_FMT_JPEG)
2653                             ? 0 : (pix->width * pix->priv) / 8;
2654         pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
2655         pix->field = V4L2_FIELD_NONE;
2656
2657         if (cmd == VIDIOC_TRY_FMT) {
2658                 if (copy_to_user(arg, &format, sizeof(format)))
2659                         return -EFAULT;
2660                 return 0;
2661         }
2662
2663         if (cam->module_param.force_munmap)
2664                 for (i = 0; i < cam->nbuffers; i++)
2665                         if (cam->frame[i].vma_use_count) {
2666                                 DBG(3, "VIDIOC_S_FMT failed. Unmap the "
2667                                        "buffers first.");
2668                                 return -EBUSY;
2669                         }
2670
2671         if (cam->stream == STREAM_ON)
2672                 if ((err = sn9c102_stream_interrupt(cam)))
2673                         return err;
2674
2675         if (copy_to_user(arg, &format, sizeof(format))) {
2676                 cam->stream = stream;
2677                 return -EFAULT;
2678         }
2679
2680         if (cam->module_param.force_munmap  || cam->io == IO_READ)
2681                 sn9c102_release_buffers(cam);
2682
2683         err += sn9c102_set_pix_format(cam, pix);
2684         err += sn9c102_set_crop(cam, &rect);
2685         if (s->set_pix_format)
2686                 err += s->set_pix_format(cam, pix);
2687         if (s->set_crop)
2688                 err += s->set_crop(cam, &rect);
2689         err += sn9c102_set_scale(cam, scale);
2690
2691         if (err) { /* atomic, no rollback in ioctl() */
2692                 cam->state |= DEV_MISCONFIGURED;
2693                 DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
2694                        "use the camera, close and open %s again.",
2695                     video_device_node_name(cam->v4ldev));
2696                 return -EIO;
2697         }
2698
2699         memcpy(pfmt, pix, sizeof(*pix));
2700         memcpy(&(s->_rect), &rect, sizeof(rect));
2701
2702         if ((cam->module_param.force_munmap  || cam->io == IO_READ) &&
2703             nbuffers != sn9c102_request_buffers(cam, nbuffers, cam->io)) {
2704                 cam->state |= DEV_MISCONFIGURED;
2705                 DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
2706                        "use the camera, close and open %s again.",
2707                     video_device_node_name(cam->v4ldev));
2708                 return -ENOMEM;
2709         }
2710
2711         if (cam->io == IO_READ)
2712                 sn9c102_empty_framequeues(cam);
2713         else if (cam->module_param.force_munmap)
2714                 sn9c102_requeue_outqueue(cam);
2715
2716         cam->stream = stream;
2717
2718         return 0;
2719 }
2720
2721
2722 static int
2723 sn9c102_vidioc_g_jpegcomp(struct sn9c102_device* cam, void __user * arg)
2724 {
2725         if (copy_to_user(arg, &cam->compression, sizeof(cam->compression)))
2726                 return -EFAULT;
2727
2728         return 0;
2729 }
2730
2731
2732 static int
2733 sn9c102_vidioc_s_jpegcomp(struct sn9c102_device* cam, void __user * arg)
2734 {
2735         struct v4l2_jpegcompression jc;
2736         const enum sn9c102_stream_state stream = cam->stream;
2737         int err = 0;
2738
2739         if (copy_from_user(&jc, arg, sizeof(jc)))
2740                 return -EFAULT;
2741
2742         if (jc.quality != 0 && jc.quality != 1)
2743                 return -EINVAL;
2744
2745         if (cam->stream == STREAM_ON)
2746                 if ((err = sn9c102_stream_interrupt(cam)))
2747                         return err;
2748
2749         err += sn9c102_set_compression(cam, &jc);
2750         if (err) { /* atomic, no rollback in ioctl() */
2751                 cam->state |= DEV_MISCONFIGURED;
2752                 DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware problems. "
2753                        "To use the camera, close and open %s again.",
2754                     video_device_node_name(cam->v4ldev));
2755                 return -EIO;
2756         }
2757
2758         cam->compression.quality = jc.quality;
2759
2760         cam->stream = stream;
2761
2762         return 0;
2763 }
2764
2765
2766 static int
2767 sn9c102_vidioc_reqbufs(struct sn9c102_device* cam, void __user * arg)
2768 {
2769         struct v4l2_requestbuffers rb;
2770         u32 i;
2771         int err;
2772
2773         if (copy_from_user(&rb, arg, sizeof(rb)))
2774                 return -EFAULT;
2775
2776         if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2777             rb.memory != V4L2_MEMORY_MMAP)
2778                 return -EINVAL;
2779
2780         if (cam->io == IO_READ) {
2781                 DBG(3, "Close and open the device again to choose the mmap "
2782                        "I/O method");
2783                 return -EBUSY;
2784         }
2785
2786         for (i = 0; i < cam->nbuffers; i++)
2787                 if (cam->frame[i].vma_use_count) {
2788                         DBG(3, "VIDIOC_REQBUFS failed. Previous buffers are "
2789                                "still mapped.");
2790                         return -EBUSY;
2791                 }
2792
2793         if (cam->stream == STREAM_ON)
2794                 if ((err = sn9c102_stream_interrupt(cam)))
2795                         return err;
2796
2797         sn9c102_empty_framequeues(cam);
2798
2799         sn9c102_release_buffers(cam);
2800         if (rb.count)
2801                 rb.count = sn9c102_request_buffers(cam, rb.count, IO_MMAP);
2802
2803         if (copy_to_user(arg, &rb, sizeof(rb))) {
2804                 sn9c102_release_buffers(cam);
2805                 cam->io = IO_NONE;
2806                 return -EFAULT;
2807         }
2808
2809         cam->io = rb.count ? IO_MMAP : IO_NONE;
2810
2811         return 0;
2812 }
2813
2814
2815 static int
2816 sn9c102_vidioc_querybuf(struct sn9c102_device* cam, void __user * arg)
2817 {
2818         struct v4l2_buffer b;
2819
2820         if (copy_from_user(&b, arg, sizeof(b)))
2821                 return -EFAULT;
2822
2823         if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2824             b.index >= cam->nbuffers || cam->io != IO_MMAP)
2825                 return -EINVAL;
2826
2827         memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
2828
2829         if (cam->frame[b.index].vma_use_count)
2830                 b.flags |= V4L2_BUF_FLAG_MAPPED;
2831
2832         if (cam->frame[b.index].state == F_DONE)
2833                 b.flags |= V4L2_BUF_FLAG_DONE;
2834         else if (cam->frame[b.index].state != F_UNUSED)
2835                 b.flags |= V4L2_BUF_FLAG_QUEUED;
2836
2837         if (copy_to_user(arg, &b, sizeof(b)))
2838                 return -EFAULT;
2839
2840         return 0;
2841 }
2842
2843
2844 static int
2845 sn9c102_vidioc_qbuf(struct sn9c102_device* cam, void __user * arg)
2846 {
2847         struct v4l2_buffer b;
2848         unsigned long lock_flags;
2849
2850         if (copy_from_user(&b, arg, sizeof(b)))
2851                 return -EFAULT;
2852
2853         if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2854             b.index >= cam->nbuffers || cam->io != IO_MMAP)
2855                 return -EINVAL;
2856
2857         if (cam->frame[b.index].state != F_UNUSED)
2858                 return -EINVAL;
2859
2860         cam->frame[b.index].state = F_QUEUED;
2861
2862         spin_lock_irqsave(&cam->queue_lock, lock_flags);
2863         list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
2864         spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2865
2866         PDBGG("Frame #%lu queued", (unsigned long)b.index);
2867
2868         return 0;
2869 }
2870
2871
2872 static int
2873 sn9c102_vidioc_dqbuf(struct sn9c102_device* cam, struct file* filp,
2874                      void __user * arg)
2875 {
2876         struct v4l2_buffer b;
2877         struct sn9c102_frame_t *f;
2878         unsigned long lock_flags;
2879         long timeout;
2880         int err = 0;
2881
2882         if (copy_from_user(&b, arg, sizeof(b)))
2883                 return -EFAULT;
2884
2885         if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2886                 return -EINVAL;
2887
2888         if (list_empty(&cam->outqueue)) {
2889                 if (cam->stream == STREAM_OFF)
2890                         return -EINVAL;
2891                 if (filp->f_flags & O_NONBLOCK)
2892                         return -EAGAIN;
2893                 if (!cam->module_param.frame_timeout) {
2894                         err = wait_event_interruptible
2895                               ( cam->wait_frame,
2896                                 (!list_empty(&cam->outqueue)) ||
2897                                 (cam->state & DEV_DISCONNECTED) ||
2898                                 (cam->state & DEV_MISCONFIGURED) );
2899                         if (err)
2900                                 return err;
2901                 } else {
2902                         timeout = wait_event_interruptible_timeout
2903                                   ( cam->wait_frame,
2904                                     (!list_empty(&cam->outqueue)) ||
2905                                     (cam->state & DEV_DISCONNECTED) ||
2906                                     (cam->state & DEV_MISCONFIGURED),
2907                                     cam->module_param.frame_timeout *
2908                                     1000 * msecs_to_jiffies(1) );
2909                         if (timeout < 0)
2910                                 return timeout;
2911                         else if (timeout == 0 &&
2912                                  !(cam->state & DEV_DISCONNECTED)) {
2913                                 DBG(1, "Video frame timeout elapsed");
2914                                 return -EIO;
2915                         }
2916                 }
2917                 if (cam->state & DEV_DISCONNECTED)
2918                         return -ENODEV;
2919                 if (cam->state & DEV_MISCONFIGURED)
2920                         return -EIO;
2921         }
2922
2923         spin_lock_irqsave(&cam->queue_lock, lock_flags);
2924         f = list_entry(cam->outqueue.next, struct sn9c102_frame_t, frame);
2925         list_del(cam->outqueue.next);
2926         spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2927
2928         f->state = F_UNUSED;
2929
2930         memcpy(&b, &f->buf, sizeof(b));
2931         if (f->vma_use_count)
2932                 b.flags |= V4L2_BUF_FLAG_MAPPED;
2933
2934         if (copy_to_user(arg, &b, sizeof(b)))
2935                 return -EFAULT;
2936
2937         PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
2938
2939         return 0;
2940 }
2941
2942
2943 static int
2944 sn9c102_vidioc_streamon(struct sn9c102_device* cam, void __user * arg)
2945 {
2946         int type;
2947
2948         if (copy_from_user(&type, arg, sizeof(type)))
2949                 return -EFAULT;
2950
2951         if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2952                 return -EINVAL;
2953
2954         cam->stream = STREAM_ON;
2955
2956         DBG(3, "Stream on");
2957
2958         return 0;
2959 }
2960
2961
2962 static int
2963 sn9c102_vidioc_streamoff(struct sn9c102_device* cam, void __user * arg)
2964 {
2965         int type, err;
2966
2967         if (copy_from_user(&type, arg, sizeof(type)))
2968                 return -EFAULT;
2969
2970         if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2971                 return -EINVAL;
2972
2973         if (cam->stream == STREAM_ON)
2974                 if ((err = sn9c102_stream_interrupt(cam)))
2975                         return err;
2976
2977         sn9c102_empty_framequeues(cam);
2978
2979         DBG(3, "Stream off");
2980
2981         return 0;
2982 }
2983
2984
2985 static int
2986 sn9c102_vidioc_g_parm(struct sn9c102_device* cam, void __user * arg)
2987 {
2988         struct v4l2_streamparm sp;
2989
2990         if (copy_from_user(&sp, arg, sizeof(sp)))
2991                 return -EFAULT;
2992
2993         if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2994                 return -EINVAL;
2995
2996         sp.parm.capture.extendedmode = 0;
2997         sp.parm.capture.readbuffers = cam->nreadbuffers;
2998
2999         if (copy_to_user(arg, &sp, sizeof(sp)))
3000                 return -EFAULT;
3001
3002         return 0;
3003 }
3004
3005
3006 static int
3007 sn9c102_vidioc_s_parm(struct sn9c102_device* cam, void __user * arg)
3008 {
3009         struct v4l2_streamparm sp;
3010
3011         if (copy_from_user(&sp, arg, sizeof(sp)))
3012                 return -EFAULT;
3013
3014         if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
3015                 return -EINVAL;
3016
3017         sp.parm.capture.extendedmode = 0;
3018
3019         if (sp.parm.capture.readbuffers == 0)
3020                 sp.parm.capture.readbuffers = cam->nreadbuffers;
3021
3022         if (sp.parm.capture.readbuffers > SN9C102_MAX_FRAMES)
3023                 sp.parm.capture.readbuffers = SN9C102_MAX_FRAMES;
3024
3025         if (copy_to_user(arg, &sp, sizeof(sp)))
3026                 return -EFAULT;
3027
3028         cam->nreadbuffers = sp.parm.capture.readbuffers;
3029
3030         return 0;
3031 }
3032
3033
3034 static int
3035 sn9c102_vidioc_enumaudio(struct sn9c102_device* cam, void __user * arg)
3036 {
3037         struct v4l2_audio audio;
3038
3039         if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102)
3040                 return -EINVAL;
3041
3042         if (copy_from_user(&audio, arg, sizeof(audio)))
3043                 return -EFAULT;
3044
3045         if (audio.index != 0)
3046                 return -EINVAL;
3047
3048         strcpy(audio.name, "Microphone");
3049         audio.capability = 0;
3050         audio.mode = 0;
3051
3052         if (copy_to_user(arg, &audio, sizeof(audio)))
3053                 return -EFAULT;
3054
3055         return 0;
3056 }
3057
3058
3059 static int
3060 sn9c102_vidioc_g_audio(struct sn9c102_device* cam, void __user * arg)
3061 {
3062         struct v4l2_audio audio;
3063
3064         if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102)
3065                 return -EINVAL;
3066
3067         if (copy_from_user(&audio, arg, sizeof(audio)))
3068                 return -EFAULT;
3069
3070         memset(&audio, 0, sizeof(audio));
3071         strcpy(audio.name, "Microphone");
3072
3073         if (copy_to_user(arg, &audio, sizeof(audio)))
3074                 return -EFAULT;
3075
3076         return 0;
3077 }
3078
3079
3080 static int
3081 sn9c102_vidioc_s_audio(struct sn9c102_device* cam, void __user * arg)
3082 {
3083         struct v4l2_audio audio;
3084
3085         if (cam->bridge == BRIDGE_SN9C101 || cam->bridge == BRIDGE_SN9C102)
3086                 return -EINVAL;
3087
3088         if (copy_from_user(&audio, arg, sizeof(audio)))
3089                 return -EFAULT;
3090
3091         if (audio.index != 0)
3092                 return -EINVAL;
3093
3094         return 0;
3095 }
3096
3097
3098 static long sn9c102_ioctl_v4l2(struct file *filp,
3099                               unsigned int cmd, void __user *arg)
3100 {
3101         struct sn9c102_device *cam = video_drvdata(filp);
3102
3103         switch (cmd) {
3104
3105         case VIDIOC_QUERYCAP:
3106                 return sn9c102_vidioc_querycap(cam, arg);
3107
3108         case VIDIOC_ENUMINPUT:
3109                 return sn9c102_vidioc_enuminput(cam, arg);
3110
3111         case VIDIOC_G_INPUT:
3112                 return sn9c102_vidioc_g_input(cam, arg);
3113
3114         case VIDIOC_S_INPUT:
3115                 return sn9c102_vidioc_s_input(cam, arg);
3116
3117         case VIDIOC_QUERYCTRL:
3118                 return sn9c102_vidioc_query_ctrl(cam, arg);
3119
3120         case VIDIOC_G_CTRL:
3121                 return sn9c102_vidioc_g_ctrl(cam, arg);
3122
3123         case VIDIOC_S_CTRL:
3124                 return sn9c102_vidioc_s_ctrl(cam, arg);
3125
3126         case VIDIOC_CROPCAP:
3127                 return sn9c102_vidioc_cropcap(cam, arg);
3128
3129         case VIDIOC_G_CROP:
3130                 return sn9c102_vidioc_g_crop(cam, arg);
3131
3132         case VIDIOC_S_CROP:
3133                 return sn9c102_vidioc_s_crop(cam, arg);
3134
3135         case VIDIOC_ENUM_FRAMESIZES:
3136                 return sn9c102_vidioc_enum_framesizes(cam, arg);
3137
3138         case VIDIOC_ENUM_FMT:
3139                 return sn9c102_vidioc_enum_fmt(cam, arg);
3140
3141         case VIDIOC_G_FMT:
3142                 return sn9c102_vidioc_g_fmt(cam, arg);
3143
3144         case VIDIOC_TRY_FMT:
3145         case VIDIOC_S_FMT:
3146                 return sn9c102_vidioc_try_s_fmt(cam, cmd, arg);
3147
3148         case VIDIOC_G_JPEGCOMP:
3149                 return sn9c102_vidioc_g_jpegcomp(cam, arg);
3150
3151         case VIDIOC_S_JPEGCOMP:
3152                 return sn9c102_vidioc_s_jpegcomp(cam, arg);
3153
3154         case VIDIOC_REQBUFS:
3155                 return sn9c102_vidioc_reqbufs(cam, arg);
3156
3157         case VIDIOC_QUERYBUF:
3158                 return sn9c102_vidioc_querybuf(cam, arg);
3159
3160         case VIDIOC_QBUF:
3161                 return sn9c102_vidioc_qbuf(cam, arg);
3162
3163         case VIDIOC_DQBUF:
3164                 return sn9c102_vidioc_dqbuf(cam, filp, arg);
3165
3166         case VIDIOC_STREAMON:
3167                 return sn9c102_vidioc_streamon(cam, arg);
3168
3169         case VIDIOC_STREAMOFF:
3170                 return sn9c102_vidioc_streamoff(cam, arg);
3171
3172         case VIDIOC_G_PARM:
3173                 return sn9c102_vidioc_g_parm(cam, arg);
3174
3175         case VIDIOC_S_PARM:
3176                 return sn9c102_vidioc_s_parm(cam, arg);
3177
3178         case VIDIOC_ENUMAUDIO:
3179                 return sn9c102_vidioc_enumaudio(cam, arg);
3180
3181         case VIDIOC_G_AUDIO:
3182                 return sn9c102_vidioc_g_audio(cam, arg);
3183
3184         case VIDIOC_S_AUDIO:
3185                 return sn9c102_vidioc_s_audio(cam, arg);
3186
3187         default:
3188                 return -ENOTTY;
3189
3190         }
3191 }
3192
3193
3194 static long sn9c102_ioctl(struct file *filp,
3195                          unsigned int cmd, unsigned long arg)
3196 {
3197         struct sn9c102_device *cam = video_drvdata(filp);
3198         int err = 0;
3199
3200         if (mutex_lock_interruptible(&cam->fileop_mutex))
3201                 return -ERESTARTSYS;
3202
3203         if (cam->state & DEV_DISCONNECTED) {
3204                 DBG(1, "Device not present");
3205                 mutex_unlock(&cam->fileop_mutex);
3206                 return -ENODEV;
3207         }
3208
3209         if (cam->state & DEV_MISCONFIGURED) {
3210                 DBG(1, "The camera is misconfigured. Close and open it "
3211                        "again.");
3212                 mutex_unlock(&cam->fileop_mutex);
3213                 return -EIO;
3214         }
3215
3216         V4LDBG(3, "sn9c102", cmd);
3217
3218         err = sn9c102_ioctl_v4l2(filp, cmd, (void __user *)arg);
3219
3220         mutex_unlock(&cam->fileop_mutex);
3221
3222         return err;
3223 }
3224
3225 /*****************************************************************************/
3226
3227 static const struct v4l2_file_operations sn9c102_fops = {
3228         .owner = THIS_MODULE,
3229         .open = sn9c102_open,
3230         .release = sn9c102_release,
3231         .unlocked_ioctl = sn9c102_ioctl,
3232         .read = sn9c102_read,
3233         .poll = sn9c102_poll,
3234         .mmap = sn9c102_mmap,
3235 };
3236
3237 /*****************************************************************************/
3238
3239 /* It exists a single interface only. We do not need to validate anything. */
3240 static int
3241 sn9c102_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
3242 {
3243         struct usb_device *udev = interface_to_usbdev(intf);
3244         struct sn9c102_device* cam;
3245         static unsigned int dev_nr;
3246         unsigned int i;
3247         int err = 0, r;
3248
3249         if (!(cam = kzalloc(sizeof(struct sn9c102_device), GFP_KERNEL)))
3250                 return -ENOMEM;
3251
3252         cam->usbdev = udev;
3253
3254         if (!(cam->control_buffer = kzalloc(8, GFP_KERNEL))) {
3255                 DBG(1, "kzalloc() failed");
3256                 err = -ENOMEM;
3257                 goto fail;
3258         }
3259
3260         if (!(cam->v4ldev = video_device_alloc())) {
3261                 DBG(1, "video_device_alloc() failed");
3262                 err = -ENOMEM;
3263                 goto fail;
3264         }
3265
3266         r = sn9c102_read_reg(cam, 0x00);
3267         if (r < 0 || (r != 0x10 && r != 0x11 && r != 0x12)) {
3268                 DBG(1, "Sorry, this is not a SN9C1xx-based camera "
3269                        "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3270                 err = -ENODEV;
3271                 goto fail;
3272         }
3273
3274         cam->bridge = id->driver_info;
3275         switch (cam->bridge) {
3276         case BRIDGE_SN9C101:
3277         case BRIDGE_SN9C102:
3278                 DBG(2, "SN9C10[12] PC Camera Controller detected "
3279                        "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3280                 break;
3281         case BRIDGE_SN9C103:
3282                 DBG(2, "SN9C103 PC Camera Controller detected "
3283                        "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3284                 break;
3285         case BRIDGE_SN9C105:
3286                 DBG(2, "SN9C105 PC Camera Controller detected "
3287                        "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3288                 break;
3289         case BRIDGE_SN9C120:
3290                 DBG(2, "SN9C120 PC Camera Controller detected "
3291                        "(vid:pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);
3292                 break;
3293         }
3294
3295         for  (i = 0; i < ARRAY_SIZE(sn9c102_sensor_table); i++) {
3296                 err = sn9c102_sensor_table[i](cam);
3297                 if (!err)
3298                         break;
3299         }
3300
3301         if (!err) {
3302                 DBG(2, "%s image sensor detected", cam->sensor.name);
3303                 DBG(3, "Support for %s maintained by %s",
3304                     cam->sensor.name, cam->sensor.maintainer);
3305         } else {
3306                 DBG(1, "No supported image sensor detected for this bridge");
3307                 err = -ENODEV;
3308                 goto fail;
3309         }
3310
3311         if (!(cam->bridge & cam->sensor.supported_bridge)) {
3312                 DBG(1, "Bridge not supported");
3313                 err = -ENODEV;
3314                 goto fail;
3315         }
3316
3317         if (sn9c102_init(cam)) {
3318                 DBG(1, "Initialization failed. I will retry on open().");
3319                 cam->state |= DEV_MISCONFIGURED;
3320         }
3321
3322         strcpy(cam->v4ldev->name, "SN9C1xx PC Camera");
3323         cam->v4ldev->fops = &sn9c102_fops;
3324         cam->v4ldev->release = video_device_release;
3325         cam->v4ldev->parent = &udev->dev;
3326
3327         init_completion(&cam->probe);
3328
3329         err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
3330                                     video_nr[dev_nr]);
3331         if (err) {
3332                 DBG(1, "V4L2 device registration failed");
3333                 if (err == -ENFILE && video_nr[dev_nr] == -1)
3334                         DBG(1, "Free /dev/videoX node not found");
3335                 video_nr[dev_nr] = -1;
3336                 dev_nr = (dev_nr < SN9C102_MAX_DEVICES-1) ? dev_nr+1 : 0;
3337                 complete_all(&cam->probe);
3338                 goto fail;
3339         }
3340
3341         DBG(2, "V4L2 device registered as %s",
3342             video_device_node_name(cam->v4ldev));
3343
3344         video_set_drvdata(cam->v4ldev, cam);
3345         cam->module_param.force_munmap = force_munmap[dev_nr];
3346         cam->module_param.frame_timeout = frame_timeout[dev_nr];
3347
3348         dev_nr = (dev_nr < SN9C102_MAX_DEVICES-1) ? dev_nr+1 : 0;
3349
3350 #ifdef CONFIG_VIDEO_ADV_DEBUG
3351         err = sn9c102_create_sysfs(cam);
3352         if (!err)
3353                 DBG(2, "Optional device control through 'sysfs' "
3354                        "interface ready");
3355         else
3356                 DBG(2, "Failed to create optional 'sysfs' interface for "
3357                        "device controlling. Error #%d", err);
3358 #else
3359         DBG(2, "Optional device control through 'sysfs' interface disabled");
3360         DBG(3, "Compile the kernel with the 'CONFIG_VIDEO_ADV_DEBUG' "
3361                "configuration option to enable it.");
3362 #endif
3363
3364         usb_set_intfdata(intf, cam);
3365         kref_init(&cam->kref);
3366         usb_get_dev(cam->usbdev);
3367
3368         complete_all(&cam->probe);
3369
3370         return 0;
3371
3372 fail:
3373         if (cam) {
3374                 kfree(cam->control_buffer);
3375                 if (cam->v4ldev)
3376                         video_device_release(cam->v4ldev);
3377                 kfree(cam);
3378         }
3379         return err;
3380 }
3381
3382
3383 static void sn9c102_usb_disconnect(struct usb_interface* intf)
3384 {
3385         struct sn9c102_device* cam;
3386
3387         down_write(&sn9c102_dev_lock);
3388
3389         cam = usb_get_intfdata(intf);
3390
3391         DBG(2, "Disconnecting %s...", cam->v4ldev->name);
3392
3393         if (cam->users) {
3394                 DBG(2, "Device %s is open! Deregistration and memory "
3395                        "deallocation are deferred.",
3396                     video_device_node_name(cam->v4ldev));
3397                 cam->state |= DEV_MISCONFIGURED;
3398                 sn9c102_stop_transfer(cam);
3399                 cam->state |= DEV_DISCONNECTED;
3400                 wake_up_interruptible(&cam->wait_frame);
3401                 wake_up(&cam->wait_stream);
3402         } else
3403                 cam->state |= DEV_DISCONNECTED;
3404
3405         wake_up_interruptible_all(&cam->wait_open);
3406
3407         kref_put(&cam->kref, sn9c102_release_resources);
3408
3409         up_write(&sn9c102_dev_lock);
3410 }
3411
3412
3413 static struct usb_driver sn9c102_usb_driver = {
3414         .name =       "sn9c102",
3415         .id_table =   sn9c102_id_table,
3416         .probe =      sn9c102_usb_probe,
3417         .disconnect = sn9c102_usb_disconnect,
3418 };
3419
3420 module_usb_driver(sn9c102_usb_driver);