drivers/media/video/cx231xx/cx231xx-cards.c

   1 /*
   2    cx231xx-cards.c - driver for Conexant Cx23100/101/102
   3                                 USB video capture devices
   4
   5    Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
   6                                 Based on em28xx driver
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  */
  22
  23 #include <linux/init.h>
  24 #include <linux/module.h>
  25 #include <linux/delay.h>
  26 #include <linux/i2c.h>
  27 #include <linux/usb.h>
  28 #include <media/tuner.h>
  29 #include <media/tveeprom.h>
  30 #include <media/v4l2-common.h>
  31 #include <media/v4l2-chip-ident.h>
  32
  33 #include <media/cx25840.h>
  34 #include "xc5000.h"
  35
  36 #include "cx231xx.h"
  37
  38 static int tuner = -1;
  39 module_param(tuner, int, 0444);
  40 MODULE_PARM_DESC(tuner, "tuner type");
  41
  42 static unsigned int disable_ir;
  43 module_param(disable_ir, int, 0444);
  44 MODULE_PARM_DESC(disable_ir, "disable infrared remote support");
  45
  46 /* Bitmask marking allocated devices from 0 to CX231XX_MAXBOARDS */
  47 static unsigned long cx231xx_devused;
  48
  49 /*
  50  *  Reset sequences for analog/digital modes
  51  */
  52
  53 static struct cx231xx_reg_seq RDE250_XCV_TUNER[] = {
  54         {0x03, 0x01, 10},
  55         {0x03, 0x00, 30},
  56         {0x03, 0x01, 10},
  57         {-1, -1, -1},
  58 };
  59
  60 /*
  61  *  Board definitions
  62  */
  63 struct cx231xx_board cx231xx_boards[] = {
  64         [CX231XX_BOARD_UNKNOWN] = {
  65                 .name = "Unknown CX231xx video grabber",
  66                 .tuner_type = TUNER_ABSENT,
  67                 .input = {{
  68                                 .type = CX231XX_VMUX_TELEVISION,
  69                                 .vmux = CX231XX_VIN_3_1,
  70                                 .amux = CX231XX_AMUX_VIDEO,
  71                                 .gpio = NULL,
  72                         }, {
  73                                 .type = CX231XX_VMUX_COMPOSITE1,
  74                                 .vmux = CX231XX_VIN_2_1,
  75                                 .amux = CX231XX_AMUX_LINE_IN,
  76                                 .gpio = NULL,
  77                         }, {
  78                                 .type = CX231XX_VMUX_SVIDEO,
  79                                 .vmux = CX231XX_VIN_1_1 |
  80                                         (CX231XX_VIN_1_2 << 8) |
  81                                         CX25840_SVIDEO_ON,
  82                                 .amux = CX231XX_AMUX_LINE_IN,
  83                                 .gpio = NULL,
  84                         }
  85                 },
  86         },
  87         [CX231XX_BOARD_CNXT_RDE_250] = {
  88                 .name = "Conexant Hybrid TV - RDE250",
  89                 .tuner_type = TUNER_XC5000,
  90                 .tuner_addr = 0x61,
  91                 .tuner_gpio = RDE250_XCV_TUNER,
  92                 .tuner_sif_gpio = 0x05,
  93                 .tuner_scl_gpio = 0x1a,
  94                 .tuner_sda_gpio = 0x1b,
  95                 .decoder = CX231XX_AVDECODER,
  96                 .demod_xfer_mode = 0,
  97                 .ctl_pin_status_mask = 0xFFFFFFC4,
  98                 .agc_analog_digital_select_gpio = 0x0c,
  99                 .gpio_pin_status_mask = 0x4001000,
 100                 .tuner_i2c_master = 1,
 101                 .demod_i2c_master = 2,
 102                 .has_dvb = 1,
 103                 .demod_addr = 0x02,
 104                 .norm = V4L2_STD_PAL,
 105
 106                 .input = {{
 107                                 .type = CX231XX_VMUX_TELEVISION,
 108                                 .vmux = CX231XX_VIN_3_1,
 109                                 .amux = CX231XX_AMUX_VIDEO,
 110                                 .gpio = NULL,
 111                         }, {
 112                                 .type = CX231XX_VMUX_COMPOSITE1,
 113                                 .vmux = CX231XX_VIN_2_1,
 114                                 .amux = CX231XX_AMUX_LINE_IN,
 115                                 .gpio = NULL,
 116                         }, {
 117                                 .type = CX231XX_VMUX_SVIDEO,
 118                                 .vmux = CX231XX_VIN_1_1 |
 119                                         (CX231XX_VIN_1_2 << 8) |
 120                                         CX25840_SVIDEO_ON,
 121                                 .amux = CX231XX_AMUX_LINE_IN,
 122                                 .gpio = NULL,
 123                         }
 124                 },
 125         },
 126
 127         [CX231XX_BOARD_CNXT_RDU_250] = {
 128                 .name = "Conexant Hybrid TV - RDU250",
 129                 .tuner_type = TUNER_XC5000,
 130                 .tuner_addr = 0x61,
 131                 .tuner_gpio = RDE250_XCV_TUNER,
 132                 .tuner_sif_gpio = 0x05,
 133                 .tuner_scl_gpio = 0x1a,
 134                 .tuner_sda_gpio = 0x1b,
 135                 .decoder = CX231XX_AVDECODER,
 136                 .demod_xfer_mode = 0,
 137                 .ctl_pin_status_mask = 0xFFFFFFC4,
 138                 .agc_analog_digital_select_gpio = 0x0c,
 139                 .gpio_pin_status_mask = 0x4001000,
 140                 .tuner_i2c_master = 1,
 141                 .demod_i2c_master = 2,
 142                 .has_dvb = 1,
 143                 .demod_addr = 0x32,
 144                 .norm = V4L2_STD_NTSC,
 145
 146                 .input = {{
 147                                 .type = CX231XX_VMUX_TELEVISION,
 148                                 .vmux = CX231XX_VIN_3_1,
 149                                 .amux = CX231XX_AMUX_VIDEO,
 150                                 .gpio = NULL,
 151                         }, {
 152                                 .type = CX231XX_VMUX_COMPOSITE1,
 153                                 .vmux = CX231XX_VIN_2_1,
 154                                 .amux = CX231XX_AMUX_LINE_IN,
 155                                 .gpio = NULL,
 156                         }, {
 157                                 .type = CX231XX_VMUX_SVIDEO,
 158                                 .vmux = CX231XX_VIN_1_1 |
 159                                         (CX231XX_VIN_1_2 << 8) |
 160                                         CX25840_SVIDEO_ON,
 161                                 .amux = CX231XX_AMUX_LINE_IN,
 162                                 .gpio = NULL,
 163                         }
 164                 },
 165         },
 166 };
 167 const unsigned int cx231xx_bcount = ARRAY_SIZE(cx231xx_boards);
 168
 169 /* table of devices that work with this driver */
 170 struct usb_device_id cx231xx_id_table[] = {
 171         {USB_DEVICE(0x0572, 0x5A3C),
 172          .driver_info = CX231XX_BOARD_UNKNOWN},
 173         {USB_DEVICE(0x0572, 0x58A2),
 174          .driver_info = CX231XX_BOARD_CNXT_RDE_250},
 175         {USB_DEVICE(0x0572, 0x58A1),
 176          .driver_info = CX231XX_BOARD_CNXT_RDU_250},
 177         {},
 178 };
 179
 180 MODULE_DEVICE_TABLE(usb, cx231xx_id_table);
 181
 182 /* cx231xx_tuner_callback
 183  * will be used to reset XC5000 tuner using GPIO pin
 184  */
 185
 186 int cx231xx_tuner_callback(void *ptr, int component, int command, int arg)
 187 {
 188         int rc = 0;
 189         struct cx231xx *dev = ptr;
 190
 191         if (dev->tuner_type == TUNER_XC5000) {
 192                 if (command == XC5000_TUNER_RESET) {
 193                         cx231xx_info
 194                                 ("Tuner CB: RESET: cmd %d : tuner type %d \n",
 195                                  command, dev->tuner_type);
 196                         cx231xx_set_gpio_value(dev, dev->board.tuner_gpio->bit,
 197                                                1);
 198                         msleep(10);
 199                         cx231xx_set_gpio_value(dev, dev->board.tuner_gpio->bit,
 200                                                0);
 201                         msleep(330);
 202                         cx231xx_set_gpio_value(dev, dev->board.tuner_gpio->bit,
 203                                                1);
 204                         msleep(10);
 205                 }
 206         }
 207         return rc;
 208 }
 209 EXPORT_SYMBOL_GPL(cx231xx_tuner_callback);
 210
 211 static inline void cx231xx_set_model(struct cx231xx *dev)
 212 {
 213         memcpy(&dev->board, &cx231xx_boards[dev->model], sizeof(dev->board));
 214 }
 215
 216 /* Since cx231xx_pre_card_setup() requires a proper dev->model,
 217  * this won't work for boards with generic PCI IDs
 218  */
 219 void cx231xx_pre_card_setup(struct cx231xx *dev)
 220 {
 221
 222         cx231xx_set_model(dev);
 223
 224         cx231xx_info("Identified as %s (card=%d)\n",
 225                      dev->board.name, dev->model);
 226
 227         /* set the direction for GPIO pins */
 228         cx231xx_set_gpio_direction(dev, dev->board.tuner_gpio->bit, 1);
 229         cx231xx_set_gpio_value(dev, dev->board.tuner_gpio->bit, 1);
 230         cx231xx_set_gpio_direction(dev, dev->board.tuner_sif_gpio, 1);
 231
 232         /* request some modules if any required */
 233
 234         /* reset the Tuner */
 235         cx231xx_gpio_set(dev, dev->board.tuner_gpio);
 236
 237         /* set the mode to Analog mode initially */
 238         cx231xx_set_mode(dev, CX231XX_ANALOG_MODE);
 239
 240         /* Unlock device */
 241         /* cx231xx_set_mode(dev, CX231XX_SUSPEND); */
 242
 243 }
 244
 245 static void cx231xx_config_tuner(struct cx231xx *dev)
 246 {
 247         struct tuner_setup tun_setup;
 248         struct v4l2_frequency f;
 249
 250         if (dev->tuner_type == TUNER_ABSENT)
 251                 return;
 252
 253         tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
 254         tun_setup.type = dev->tuner_type;
 255         tun_setup.addr = dev->tuner_addr;
 256         tun_setup.tuner_callback = cx231xx_tuner_callback;
 257
 258         tuner_call(dev, tuner, s_type_addr, &tun_setup);
 259
 260 #if 0
 261         if (tun_setup.type == TUNER_XC5000) {
 262                 static struct xc2028_ctrl ctrl = {
 263                         .fname = XC5000_DEFAULT_FIRMWARE,
 264                         .max_len = 64,
 265                         .demod = 0;
 266                 };
 267                 struct v4l2_priv_tun_config cfg = {
 268                         .tuner = dev->tuner_type,
 269                         .priv = &ctrl,
 270                 };
 271                 tuner_call(dev, tuner, s_config, &cfg);
 272         }
 273 #endif
 274         /* configure tuner */
 275         f.tuner = 0;
 276         f.type = V4L2_TUNER_ANALOG_TV;
 277         f.frequency = 9076;     /* just a magic number */
 278         dev->ctl_freq = f.frequency;
 279         call_all(dev, tuner, s_frequency, &f);
 280
 281 }
 282
 283 /* ----------------------------------------------------------------------- */
 284 void cx231xx_register_i2c_ir(struct cx231xx *dev)
 285 {
 286         if (disable_ir)
 287                 return;
 288
 289         /* REVISIT: instantiate IR device */
 290
 291         /* detect & configure */
 292         switch (dev->model) {
 293
 294         case CX231XX_BOARD_CNXT_RDE_250:
 295                 break;
 296         case CX231XX_BOARD_CNXT_RDU_250:
 297                 break;
 298         default:
 299                 break;
 300         }
 301 }
 302
 303 void cx231xx_card_setup(struct cx231xx *dev)
 304 {
 305
 306         cx231xx_set_model(dev);
 307
 308         dev->tuner_type = cx231xx_boards[dev->model].tuner_type;
 309         if (cx231xx_boards[dev->model].tuner_addr)
 310                 dev->tuner_addr = cx231xx_boards[dev->model].tuner_addr;
 311
 312         /* request some modules */
 313         if (dev->board.decoder == CX231XX_AVDECODER) {
 314                 dev->sd_cx25840 = v4l2_i2c_new_subdev(&dev->v4l2_dev,
 315                                         &dev->i2c_bus[0].i2c_adap,
 316                                         "cx25840", "cx25840", 0x88 >> 1, NULL);
 317                 if (dev->sd_cx25840 == NULL)
 318                         cx231xx_info("cx25840 subdev registration failure\n");
 319                 cx25840_call(dev, core, load_fw);
 320
 321         }
 322
 323         if (dev->board.tuner_type != TUNER_ABSENT) {
 324                 dev->sd_tuner = v4l2_i2c_new_subdev(&dev->v4l2_dev,
 325                                 &dev->i2c_bus[1].i2c_adap,
 326                                 "tuner", "tuner", 0xc2 >> 1, NULL);
 327                 if (dev->sd_tuner == NULL)
 328                         cx231xx_info("tuner subdev registration failure\n");
 329
 330                 cx231xx_config_tuner(dev);
 331         }
 332
 333         cx231xx_config_tuner(dev);
 334
 335 #if 0
 336         /* TBD  IR will be added later */
 337         cx231xx_ir_init(dev);
 338 #endif
 339 }
 340
 341 /*
 342  * cx231xx_config()
 343  * inits registers with sane defaults
 344  */
 345 int cx231xx_config(struct cx231xx *dev)
 346 {
 347         /* TBD need to add cx231xx specific code */
 348         dev->mute = 1;          /* maybe not the right place... */
 349         dev->volume = 0x1f;
 350
 351         return 0;
 352 }
 353
 354 /*
 355  * cx231xx_config_i2c()
 356  * configure i2c attached devices
 357  */
 358 void cx231xx_config_i2c(struct cx231xx *dev)
 359 {
 360         /* u32 input = INPUT(dev->video_input)->vmux; */
 361
 362         call_all(dev, video, s_stream, 1);
 363 }
 364
 365 /*
 366  * cx231xx_realease_resources()
 367  * unregisters the v4l2,i2c and usb devices
 368  * called when the device gets disconected or at module unload
 369 */
 370 void cx231xx_release_resources(struct cx231xx *dev)
 371 {
 372
 373 #if 0           /* TBD IR related  */
 374         if (dev->ir)
 375                 cx231xx_ir_fini(dev);
 376 #endif
 377
 378         cx231xx_release_analog_resources(dev);
 379
 380         cx231xx_remove_from_devlist(dev);
 381
 382         cx231xx_dev_uninit(dev);
 383
 384         usb_put_dev(dev->udev);
 385
 386         /* Mark device as unused */
 387         cx231xx_devused &= ~(1 << dev->devno);
 388 }
 389
 390 /*
 391  * cx231xx_init_dev()
 392  * allocates and inits the device structs, registers i2c bus and v4l device
 393  */
 394 static int cx231xx_init_dev(struct cx231xx **devhandle, struct usb_device *udev,
 395                             int minor)
 396 {
 397         struct cx231xx *dev = *devhandle;
 398         int retval = -ENOMEM;
 399         int errCode;
 400         unsigned int maxh, maxw;
 401
 402         dev->udev = udev;
 403         mutex_init(&dev->lock);
 404         mutex_init(&dev->ctrl_urb_lock);
 405         mutex_init(&dev->gpio_i2c_lock);
 406
 407         spin_lock_init(&dev->video_mode.slock);
 408         spin_lock_init(&dev->vbi_mode.slock);
 409         spin_lock_init(&dev->sliced_cc_mode.slock);
 410
 411         init_waitqueue_head(&dev->open);
 412         init_waitqueue_head(&dev->wait_frame);
 413         init_waitqueue_head(&dev->wait_stream);
 414
 415         dev->cx231xx_read_ctrl_reg = cx231xx_read_ctrl_reg;
 416         dev->cx231xx_write_ctrl_reg = cx231xx_write_ctrl_reg;
 417         dev->cx231xx_send_usb_command = cx231xx_send_usb_command;
 418         dev->cx231xx_gpio_i2c_read = cx231xx_gpio_i2c_read;
 419         dev->cx231xx_gpio_i2c_write = cx231xx_gpio_i2c_write;
 420
 421         /* Query cx231xx to find what pcb config it is related to */
 422         initialize_cx231xx(dev);
 423
 424         /* Cx231xx pre card setup */
 425         cx231xx_pre_card_setup(dev);
 426
 427         errCode = cx231xx_config(dev);
 428         if (errCode) {
 429                 cx231xx_errdev("error configuring device\n");
 430                 return -ENOMEM;
 431         }
 432
 433         /* set default norm */
 434         dev->norm = dev->board.norm;
 435
 436         /* register i2c bus */
 437         errCode = cx231xx_dev_init(dev);
 438         if (errCode < 0) {
 439                 cx231xx_errdev("%s: cx231xx_i2c_register - errCode [%d]!\n",
 440                                __func__, errCode);
 441                 return errCode;
 442         }
 443
 444         /* Do board specific init */
 445         cx231xx_card_setup(dev);
 446
 447         /* configure the device */
 448         cx231xx_config_i2c(dev);
 449
 450         maxw = norm_maxw(dev);
 451         maxh = norm_maxh(dev);
 452
 453         /* set default image size */
 454         dev->width = maxw;
 455         dev->height = maxh;
 456         dev->interlaced = 0;
 457         dev->hscale = 0;
 458         dev->vscale = 0;
 459         dev->video_input = 0;
 460
 461         errCode = cx231xx_config(dev);
 462         if (errCode < 0) {
 463                 cx231xx_errdev("%s: cx231xx_config - errCode [%d]!\n",
 464                                __func__, errCode);
 465                 return errCode;
 466         }
 467
 468         /* init video dma queues */
 469         INIT_LIST_HEAD(&dev->video_mode.vidq.active);
 470         INIT_LIST_HEAD(&dev->video_mode.vidq.queued);
 471
 472         /* init vbi dma queues */
 473         INIT_LIST_HEAD(&dev->vbi_mode.vidq.active);
 474         INIT_LIST_HEAD(&dev->vbi_mode.vidq.queued);
 475
 476         /* Reset other chips required if they are tied up with GPIO pins */
 477
 478         cx231xx_add_into_devlist(dev);
 479
 480         retval = cx231xx_register_analog_devices(dev);
 481         if (retval < 0) {
 482                 cx231xx_release_resources(dev);
 483                 goto fail_reg_devices;
 484         }
 485
 486         cx231xx_init_extension(dev);
 487
 488         return 0;
 489
 490 fail_reg_devices:
 491         mutex_unlock(&dev->lock);
 492         return retval;
 493 }
 494
 495 #if defined(CONFIG_MODULES) && defined(MODULE)
 496 static void request_module_async(struct work_struct *work)
 497 {
 498         struct cx231xx *dev = container_of(work,
 499                                            struct cx231xx, request_module_wk);
 500
 501         if (dev->has_alsa_audio)
 502                 request_module("cx231xx-alsa");
 503
 504         if (dev->board.has_dvb)
 505                 request_module("cx231xx-dvb");
 506
 507 }
 508
 509 static void request_modules(struct cx231xx *dev)
 510 {
 511         INIT_WORK(&dev->request_module_wk, request_module_async);
 512         schedule_work(&dev->request_module_wk);
 513 }
 514 #else
 515 #define request_modules(dev)
 516 #endif /* CONFIG_MODULES */
 517
 518 /*
 519  * cx231xx_usb_probe()
 520  * checks for supported devices
 521  */
 522 static int cx231xx_usb_probe(struct usb_interface *interface,
 523                              const struct usb_device_id *id)
 524 {
 525         struct usb_device *udev;
 526         struct usb_interface *uif;
 527         struct cx231xx *dev = NULL;
 528         int retval = -ENODEV;
 529         int nr = 0, ifnum;
 530         int i, isoc_pipe = 0;
 531         char *speed;
 532         char descr[255] = "";
 533         struct usb_interface *lif = NULL;
 534         int skip_interface = 0;
 535         struct usb_interface_assoc_descriptor *assoc_desc;
 536
 537         udev = usb_get_dev(interface_to_usbdev(interface));
 538         ifnum = interface->altsetting[0].desc.bInterfaceNumber;
 539
 540         if (!ifnum) {
 541                 /*
 542                  * Interface number 0 - IR interface
 543                  */
 544                 /* Check to see next free device and mark as used */
 545                 nr = find_first_zero_bit(&cx231xx_devused, CX231XX_MAXBOARDS);
 546                 cx231xx_devused |= 1 << nr;
 547
 548                 if (nr >= CX231XX_MAXBOARDS) {
 549                         cx231xx_err(DRIVER_NAME ": Supports only %i cx231xx boards.\n",
 550                                      CX231XX_MAXBOARDS);
 551                         cx231xx_devused &= ~(1 << nr);
 552                         return -ENOMEM;
 553                 }
 554
 555                 /* allocate memory for our device state and initialize it */
 556                 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 557                 if (dev == NULL) {
 558                         cx231xx_err(DRIVER_NAME ": out of memory!\n");
 559                         cx231xx_devused &= ~(1 << nr);
 560                         return -ENOMEM;
 561                 }
 562
 563                 snprintf(dev->name, 29, "cx231xx #%d", nr);
 564                 dev->devno = nr;
 565                 dev->model = id->driver_info;
 566                 dev->video_mode.alt = -1;
 567                 dev->interface_count++;
 568
 569                 /* reset gpio dir and value */
 570                 dev->gpio_dir = 0;
 571                 dev->gpio_val = 0;
 572                 dev->xc_fw_load_done = 0;
 573                 dev->has_alsa_audio = 1;
 574                 dev->power_mode = -1;
 575
 576                 /* 0 - vbi ; 1 -sliced cc mode */
 577                 dev->vbi_or_sliced_cc_mode = 0;
 578
 579                 /* get maximum no.of IAD interfaces */
 580                 assoc_desc = udev->actconfig->intf_assoc[0];
 581                 dev->max_iad_interface_count = assoc_desc->bInterfaceCount;
 582
 583                 /* init CIR module TBD */
 584
 585                 /* store the current interface */
 586                 lif = interface;
 587
 588                 switch (udev->speed) {
 589                 case USB_SPEED_LOW:
 590                         speed = "1.5";
 591                         break;
 592                 case USB_SPEED_UNKNOWN:
 593                 case USB_SPEED_FULL:
 594                         speed = "12";
 595                         break;
 596                 case USB_SPEED_HIGH:
 597                         speed = "480";
 598                         break;
 599                 default:
 600                         speed = "unknown";
 601                 }
 602
 603                 if (udev->manufacturer)
 604                         strlcpy(descr, udev->manufacturer, sizeof(descr));
 605
 606                 if (udev->product) {
 607                         if (*descr)
 608                                 strlcat(descr, " ", sizeof(descr));
 609                         strlcat(descr, udev->product, sizeof(descr));
 610                 }
 611                 if (*descr)
 612                         strlcat(descr, " ", sizeof(descr));
 613
 614                 cx231xx_info("New device %s@ %s Mbps "
 615                      "(%04x:%04x) with %d interfaces\n",
 616                      descr,
 617                      speed,
 618                      le16_to_cpu(udev->descriptor.idVendor),
 619                      le16_to_cpu(udev->descriptor.idProduct),
 620                      dev->max_iad_interface_count);
 621         } else {
 622                 /* Get dev structure first */
 623                 dev = usb_get_intfdata(udev->actconfig->interface[0]);
 624                 if (dev == NULL) {
 625                         cx231xx_err(DRIVER_NAME ": out of first interface!\n");
 626                         return -ENODEV;
 627                 }
 628
 629                 /* store the interface 0 back */
 630                 lif = udev->actconfig->interface[0];
 631
 632                 /* increment interface count */
 633                 dev->interface_count++;
 634
 635                 /* get device number */
 636                 nr = dev->devno;
 637
 638                 /*
 639                  * set skip interface, for all interfaces but
 640                  * interface 1 and the last one
 641                  */
 642                 if ((ifnum != 1) && ((dev->interface_count - 1)
 643                                      != dev->max_iad_interface_count))
 644                         skip_interface = 1;
 645
 646                 if (ifnum == 1) {
 647                         assoc_desc = udev->actconfig->intf_assoc[0];
 648                         if (assoc_desc->bFirstInterface != ifnum) {
 649                                 cx231xx_err(DRIVER_NAME ": Not found "
 650                                             "matching IAD interface\n");
 651                                 return -ENODEV;
 652                         }
 653                 }
 654         }
 655
 656         if (skip_interface)
 657                 return -ENODEV;
 658
 659         cx231xx_info("registering interface %d\n", ifnum);
 660
 661         /* save our data pointer in this interface device */
 662         usb_set_intfdata(lif, dev);
 663
 664         if ((dev->interface_count - 1) != dev->max_iad_interface_count)
 665                 return 0;
 666
 667         /*
 668          * AV device initialization - only done at the last interface
 669          */
 670
 671         /* Create v4l2 device */
 672         retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
 673         if (retval) {
 674                 cx231xx_errdev("v4l2_device_register failed\n");
 675                 cx231xx_devused &= ~(1 << nr);
 676                 kfree(dev);
 677                 return -EIO;
 678         }
 679
 680         /* allocate device struct */
 681         retval = cx231xx_init_dev(&dev, udev, nr);
 682         if (retval) {
 683                 cx231xx_devused &= ~(1 << dev->devno);
 684                 v4l2_device_unregister(&dev->v4l2_dev);
 685                 kfree(dev);
 686                 return retval;
 687         }
 688
 689         /* compute alternate max packet sizes for video */
 690         uif = udev->actconfig->interface[dev->current_pcb_config.
 691                        hs_config_info[0].interface_info.video_index + 1];
 692
 693         dev->video_mode.end_point_addr = le16_to_cpu(uif->altsetting[0].
 694                         endpoint[isoc_pipe].desc.bEndpointAddress);
 695
 696         dev->video_mode.num_alt = uif->num_altsetting;
 697         cx231xx_info("EndPoint Addr 0x%x, Alternate settings: %i\n",
 698                      dev->video_mode.end_point_addr,
 699                      dev->video_mode.num_alt);
 700         dev->video_mode.alt_max_pkt_size =
 701                 kmalloc(32 * dev->video_mode.num_alt, GFP_KERNEL);
 702
 703         if (dev->video_mode.alt_max_pkt_size == NULL) {
 704                 cx231xx_errdev("out of memory!\n");
 705                 cx231xx_devused &= ~(1 << nr);
 706                 v4l2_device_unregister(&dev->v4l2_dev);
 707                 kfree(dev);
 708                 return -ENOMEM;
 709         }
 710
 711         for (i = 0; i < dev->video_mode.num_alt; i++) {
 712                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].
 713                                 desc.wMaxPacketSize);
 714                 dev->video_mode.alt_max_pkt_size[i] =
 715                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
 716                 cx231xx_info("Alternate setting %i, max size= %i\n", i,
 717                              dev->video_mode.alt_max_pkt_size[i]);
 718         }
 719
 720         /* compute alternate max packet sizes for vbi */
 721         uif = udev->actconfig->interface[dev->current_pcb_config.
 722                                        hs_config_info[0].interface_info.
 723                                        vanc_index + 1];
 724
 725         dev->vbi_mode.end_point_addr =
 726             le16_to_cpu(uif->altsetting[0].endpoint[isoc_pipe].desc.
 727                         bEndpointAddress);
 728
 729         dev->vbi_mode.num_alt = uif->num_altsetting;
 730         cx231xx_info("EndPoint Addr 0x%x, Alternate settings: %i\n",
 731                      dev->vbi_mode.end_point_addr,
 732                      dev->vbi_mode.num_alt);
 733         dev->vbi_mode.alt_max_pkt_size =
 734             kmalloc(32 * dev->vbi_mode.num_alt, GFP_KERNEL);
 735
 736         if (dev->vbi_mode.alt_max_pkt_size == NULL) {
 737                 cx231xx_errdev("out of memory!\n");
 738                 cx231xx_devused &= ~(1 << nr);
 739                 v4l2_device_unregister(&dev->v4l2_dev);
 740                 kfree(dev);
 741                 return -ENOMEM;
 742         }
 743
 744         for (i = 0; i < dev->vbi_mode.num_alt; i++) {
 745                 u16 tmp =
 746                     le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].
 747                                 desc.wMaxPacketSize);
 748                 dev->vbi_mode.alt_max_pkt_size[i] =
 749                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
 750                 cx231xx_info("Alternate setting %i, max size= %i\n", i,
 751                              dev->vbi_mode.alt_max_pkt_size[i]);
 752         }
 753
 754         /* compute alternate max packet sizes for sliced CC */
 755         uif = udev->actconfig->interface[dev->current_pcb_config.
 756                                        hs_config_info[0].interface_info.
 757                                        hanc_index + 1];
 758
 759         dev->sliced_cc_mode.end_point_addr =
 760             le16_to_cpu(uif->altsetting[0].endpoint[isoc_pipe].desc.
 761                         bEndpointAddress);
 762
 763         dev->sliced_cc_mode.num_alt = uif->num_altsetting;
 764         cx231xx_info("EndPoint Addr 0x%x, Alternate settings: %i\n",
 765                      dev->sliced_cc_mode.end_point_addr,
 766                      dev->sliced_cc_mode.num_alt);
 767         dev->sliced_cc_mode.alt_max_pkt_size =
 768                 kmalloc(32 * dev->sliced_cc_mode.num_alt, GFP_KERNEL);
 769
 770         if (dev->sliced_cc_mode.alt_max_pkt_size == NULL) {
 771                 cx231xx_errdev("out of memory!\n");
 772                 cx231xx_devused &= ~(1 << nr);
 773                 v4l2_device_unregister(&dev->v4l2_dev);
 774                 kfree(dev);
 775                 return -ENOMEM;
 776         }
 777
 778         for (i = 0; i < dev->sliced_cc_mode.num_alt; i++) {
 779                 u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[isoc_pipe].
 780                                 desc.wMaxPacketSize);
 781                 dev->sliced_cc_mode.alt_max_pkt_size[i] =
 782                     (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
 783                 cx231xx_info("Alternate setting %i, max size= %i\n", i,
 784                              dev->sliced_cc_mode.alt_max_pkt_size[i]);
 785         }
 786
 787         if (dev->current_pcb_config.ts1_source != 0xff) {
 788                 /* compute alternate max packet sizes for TS1 */
 789                 uif = udev->actconfig->interface[dev->current_pcb_config.
 790                                                hs_config_info[0].
 791                                                interface_info.
 792                                                ts1_index + 1];
 793
 794                 dev->ts1_mode.end_point_addr =
 795                     le16_to_cpu(uif->altsetting[0].endpoint[isoc_pipe].
 796                                 desc.bEndpointAddress);
 797
 798                 dev->ts1_mode.num_alt = uif->num_altsetting;
 799                 cx231xx_info("EndPoint Addr 0x%x, Alternate settings: %i\n",
 800                              dev->ts1_mode.end_point_addr,
 801                              dev->ts1_mode.num_alt);
 802                 dev->ts1_mode.alt_max_pkt_size =
 803                         kmalloc(32 * dev->ts1_mode.num_alt, GFP_KERNEL);
 804
 805                 if (dev->ts1_mode.alt_max_pkt_size == NULL) {
 806                         cx231xx_errdev("out of memory!\n");
 807                         cx231xx_devused &= ~(1 << nr);
 808                         v4l2_device_unregister(&dev->v4l2_dev);
 809                         kfree(dev);
 810                         return -ENOMEM;
 811                 }
 812
 813                 for (i = 0; i < dev->ts1_mode.num_alt; i++) {
 814                         u16 tmp = le16_to_cpu(uif->altsetting[i].
 815                                                 endpoint[isoc_pipe].desc.
 816                                                 wMaxPacketSize);
 817                         dev->ts1_mode.alt_max_pkt_size[i] =
 818                             (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
 819                         cx231xx_info("Alternate setting %i, max size= %i\n", i,
 820                                      dev->ts1_mode.alt_max_pkt_size[i]);
 821                 }
 822         }
 823
 824         /* load other modules required */
 825         request_modules(dev);
 826
 827         return 0;
 828 }
 829
 830 /*
 831  * cx231xx_usb_disconnect()
 832  * called when the device gets diconencted
 833  * video device will be unregistered on v4l2_close in case it is still open
 834  */
 835 static void cx231xx_usb_disconnect(struct usb_interface *interface)
 836 {
 837         struct cx231xx *dev;
 838
 839         dev = usb_get_intfdata(interface);
 840         usb_set_intfdata(interface, NULL);
 841
 842         if (!dev)
 843                 return;
 844
 845         if (!dev->udev)
 846                 return;
 847
 848         /* delete v4l2 device */
 849         v4l2_device_unregister(&dev->v4l2_dev);
 850
 851         /* wait until all current v4l2 io is finished then deallocate
 852            resources */
 853         mutex_lock(&dev->lock);
 854
 855         wake_up_interruptible_all(&dev->open);
 856
 857         if (dev->users) {
 858                 cx231xx_warn
 859                     ("device %s is open! Deregistration and memory "
 860                      "deallocation are deferred on close.\n",
 861                      video_device_node_name(dev->vdev));
 862
 863                 dev->state |= DEV_MISCONFIGURED;
 864                 cx231xx_uninit_isoc(dev);
 865                 dev->state |= DEV_DISCONNECTED;
 866                 wake_up_interruptible(&dev->wait_frame);
 867                 wake_up_interruptible(&dev->wait_stream);
 868         } else {
 869                 dev->state |= DEV_DISCONNECTED;
 870                 cx231xx_release_resources(dev);
 871         }
 872
 873         cx231xx_close_extension(dev);
 874
 875         mutex_unlock(&dev->lock);
 876
 877         if (!dev->users) {
 878                 kfree(dev->video_mode.alt_max_pkt_size);
 879                 kfree(dev->vbi_mode.alt_max_pkt_size);
 880                 kfree(dev->sliced_cc_mode.alt_max_pkt_size);
 881                 kfree(dev->ts1_mode.alt_max_pkt_size);
 882                 kfree(dev);
 883         }
 884 }
 885
 886 static struct usb_driver cx231xx_usb_driver = {
 887         .name = "cx231xx",
 888         .probe = cx231xx_usb_probe,
 889         .disconnect = cx231xx_usb_disconnect,
 890         .id_table = cx231xx_id_table,
 891 };
 892
 893 static int __init cx231xx_module_init(void)
 894 {
 895         int result;
 896
 897         printk(KERN_INFO DRIVER_NAME " v4l2 driver loaded.\n");
 898
 899         /* register this driver with the USB subsystem */
 900         result = usb_register(&cx231xx_usb_driver);
 901         if (result)
 902                 cx231xx_err(DRIVER_NAME
 903                             " usb_register failed. Error number %d.\n", result);
 904
 905         return result;
 906 }
 907
 908 static void __exit cx231xx_module_exit(void)
 909 {
 910         /* deregister this driver with the USB subsystem */
 911         usb_deregister(&cx231xx_usb_driver);
 912 }
 913
 914 module_init(cx231xx_module_init);
 915 module_exit(cx231xx_module_exit);