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

   1 /*
   2    cx231xx-core.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/list.h>
  25 #include <linux/module.h>
  26 #include <linux/usb.h>
  27 #include <linux/vmalloc.h>
  28 #include <media/v4l2-common.h>
  29
  30 #include "cx231xx.h"
  31 #include "cx231xx-reg.h"
  32
  33 /* #define ENABLE_DEBUG_ISOC_FRAMES */
  34
  35 static unsigned int core_debug;
  36 module_param(core_debug, int, 0644);
  37 MODULE_PARM_DESC(core_debug, "enable debug messages [core]");
  38
  39 #define cx231xx_coredbg(fmt, arg...) do {\
  40         if (core_debug) \
  41                 printk(KERN_INFO "%s %s :"fmt, \
  42                          dev->name, __func__ , ##arg); } while (0)
  43
  44 static unsigned int reg_debug;
  45 module_param(reg_debug, int, 0644);
  46 MODULE_PARM_DESC(reg_debug, "enable debug messages [URB reg]");
  47
  48 #define cx231xx_regdbg(fmt, arg...) do {\
  49         if (reg_debug) \
  50                 printk(KERN_INFO "%s %s :"fmt, \
  51                          dev->name, __func__ , ##arg); } while (0)
  52
  53 static int alt = CX231XX_PINOUT;
  54 module_param(alt, int, 0644);
  55 MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint");
  56
  57 #define cx231xx_isocdbg(fmt, arg...) do {\
  58         if (core_debug) \
  59                 printk(KERN_INFO "%s %s :"fmt, \
  60                          dev->name, __func__ , ##arg); } while (0)
  61
  62 /*****************************************************************
  63 *             Device control list functions                                      *
  64 ******************************************************************/
  65
  66 static LIST_HEAD(cx231xx_devlist);
  67 static DEFINE_MUTEX(cx231xx_devlist_mutex);
  68
  69 /*
  70  * cx231xx_realease_resources()
  71  * unregisters the v4l2,i2c and usb devices
  72  * called when the device gets disconected or at module unload
  73 */
  74 void cx231xx_remove_from_devlist(struct cx231xx *dev)
  75 {
  76         mutex_lock(&cx231xx_devlist_mutex);
  77         list_del(&dev->devlist);
  78         mutex_unlock(&cx231xx_devlist_mutex);
  79 };
  80
  81 void cx231xx_add_into_devlist(struct cx231xx *dev)
  82 {
  83         mutex_lock(&cx231xx_devlist_mutex);
  84         list_add_tail(&dev->devlist, &cx231xx_devlist);
  85         mutex_unlock(&cx231xx_devlist_mutex);
  86 };
  87
  88 static LIST_HEAD(cx231xx_extension_devlist);
  89 static DEFINE_MUTEX(cx231xx_extension_devlist_lock);
  90
  91 int cx231xx_register_extension(struct cx231xx_ops *ops)
  92 {
  93         struct cx231xx *dev = NULL;
  94
  95         mutex_lock(&cx231xx_devlist_mutex);
  96         mutex_lock(&cx231xx_extension_devlist_lock);
  97         list_add_tail(&ops->next, &cx231xx_extension_devlist);
  98         list_for_each_entry(dev, &cx231xx_devlist, devlist) {
  99                 if (dev)
 100                         ops->init(dev);
 101         }
 102         printk(KERN_INFO DRIVER_NAME ": %s initialized\n", ops->name);
 103         mutex_unlock(&cx231xx_extension_devlist_lock);
 104         mutex_unlock(&cx231xx_devlist_mutex);
 105         return 0;
 106 }
 107 EXPORT_SYMBOL(cx231xx_register_extension);
 108
 109 void cx231xx_unregister_extension(struct cx231xx_ops *ops)
 110 {
 111         struct cx231xx *dev = NULL;
 112
 113         mutex_lock(&cx231xx_devlist_mutex);
 114         list_for_each_entry(dev, &cx231xx_devlist, devlist) {
 115                 if (dev)
 116                         ops->fini(dev);
 117         }
 118
 119         mutex_lock(&cx231xx_extension_devlist_lock);
 120         printk(KERN_INFO DRIVER_NAME ": %s removed\n", ops->name);
 121         list_del(&ops->next);
 122         mutex_unlock(&cx231xx_extension_devlist_lock);
 123         mutex_unlock(&cx231xx_devlist_mutex);
 124 }
 125 EXPORT_SYMBOL(cx231xx_unregister_extension);
 126
 127 void cx231xx_init_extension(struct cx231xx *dev)
 128 {
 129         struct cx231xx_ops *ops = NULL;
 130
 131         mutex_lock(&cx231xx_extension_devlist_lock);
 132         if (!list_empty(&cx231xx_extension_devlist)) {
 133                 list_for_each_entry(ops, &cx231xx_extension_devlist, next) {
 134                         if (ops->init)
 135                                 ops->init(dev);
 136                 }
 137         }
 138         mutex_unlock(&cx231xx_extension_devlist_lock);
 139 }
 140
 141 void cx231xx_close_extension(struct cx231xx *dev)
 142 {
 143         struct cx231xx_ops *ops = NULL;
 144
 145         mutex_lock(&cx231xx_extension_devlist_lock);
 146         if (!list_empty(&cx231xx_extension_devlist)) {
 147                 list_for_each_entry(ops, &cx231xx_extension_devlist, next) {
 148                         if (ops->fini)
 149                                 ops->fini(dev);
 150                 }
 151         }
 152         mutex_unlock(&cx231xx_extension_devlist_lock);
 153 }
 154
 155 /****************************************************************
 156 *               U S B related functions                         *
 157 *****************************************************************/
 158 int cx231xx_send_usb_command(struct cx231xx_i2c *i2c_bus,
 159                              struct cx231xx_i2c_xfer_data *req_data)
 160 {
 161         int status = 0;
 162         struct cx231xx *dev = i2c_bus->dev;
 163         struct VENDOR_REQUEST_IN ven_req;
 164
 165         u8 saddr_len = 0;
 166         u8 _i2c_period = 0;
 167         u8 _i2c_nostop = 0;
 168         u8 _i2c_reserve = 0;
 169
 170         /* Get the I2C period, nostop and reserve parameters */
 171         _i2c_period = i2c_bus->i2c_period;
 172         _i2c_nostop = i2c_bus->i2c_nostop;
 173         _i2c_reserve = i2c_bus->i2c_reserve;
 174
 175         saddr_len = req_data->saddr_len;
 176
 177         /* Set wValue */
 178         if (saddr_len == 1)     /* need check saddr_len == 0  */
 179                 ven_req.wValue =
 180                     req_data->
 181                     dev_addr << 9 | _i2c_period << 4 | saddr_len << 2 |
 182                     _i2c_nostop << 1 | I2C_SYNC | _i2c_reserve << 6;
 183         else
 184                 ven_req.wValue =
 185                     req_data->
 186                     dev_addr << 9 | _i2c_period << 4 | saddr_len << 2 |
 187                     _i2c_nostop << 1 | I2C_SYNC | _i2c_reserve << 6;
 188
 189         /* set channel number */
 190         if (req_data->direction & I2C_M_RD) {
 191                 /* channel number, for read,spec required channel_num +4 */
 192                 ven_req.bRequest = i2c_bus->nr + 4;
 193         } else
 194                 ven_req.bRequest = i2c_bus->nr; /* channel number,  */
 195
 196         /* set index value */
 197         switch (saddr_len) {
 198         case 0:
 199                 ven_req.wIndex = 0;     /* need check */
 200                 break;
 201         case 1:
 202                 ven_req.wIndex = (req_data->saddr_dat & 0xff);
 203                 break;
 204         case 2:
 205                 ven_req.wIndex = req_data->saddr_dat;
 206                 break;
 207         }
 208
 209         /* set wLength value */
 210         ven_req.wLength = req_data->buf_size;
 211
 212         /* set bData value */
 213         ven_req.bData = 0;
 214
 215         /* set the direction */
 216         if (req_data->direction) {
 217                 ven_req.direction = USB_DIR_IN;
 218                 memset(req_data->p_buffer, 0x00, ven_req.wLength);
 219         } else
 220                 ven_req.direction = USB_DIR_OUT;
 221
 222         /* set the buffer for read / write */
 223         ven_req.pBuff = req_data->p_buffer;
 224
 225
 226         /* call common vendor command request */
 227         status = cx231xx_send_vendor_cmd(dev, &ven_req);
 228         if (status < 0) {
 229                 cx231xx_info
 230                     ("UsbInterface::sendCommand, failed with status -%d\n",
 231                      status);
 232         }
 233
 234         return status;
 235 }
 236 EXPORT_SYMBOL_GPL(cx231xx_send_usb_command);
 237
 238 /*
 239  * cx231xx_read_ctrl_reg()
 240  * reads data from the usb device specifying bRequest and wValue
 241  */
 242 int cx231xx_read_ctrl_reg(struct cx231xx *dev, u8 req, u16 reg,
 243                           char *buf, int len)
 244 {
 245         u8 val = 0;
 246         int ret;
 247         int pipe = usb_rcvctrlpipe(dev->udev, 0);
 248
 249         if (dev->state & DEV_DISCONNECTED)
 250                 return -ENODEV;
 251
 252         if (len > URB_MAX_CTRL_SIZE)
 253                 return -EINVAL;
 254
 255         switch (len) {
 256         case 1:
 257                 val = ENABLE_ONE_BYTE;
 258                 break;
 259         case 2:
 260                 val = ENABLE_TWE_BYTE;
 261                 break;
 262         case 3:
 263                 val = ENABLE_THREE_BYTE;
 264                 break;
 265         case 4:
 266                 val = ENABLE_FOUR_BYTE;
 267                 break;
 268         default:
 269                 val = 0xFF;     /* invalid option */
 270         }
 271
 272         if (val == 0xFF)
 273                 return -EINVAL;
 274
 275         if (reg_debug) {
 276                 cx231xx_isocdbg("(pipe 0x%08x): "
 277                                 "IN:  %02x %02x %02x %02x %02x %02x %02x %02x ",
 278                                 pipe,
 279                                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 280                                 req, 0, val,
 281                                 reg & 0xff, reg >> 8, len & 0xff, len >> 8);
 282         }
 283
 284         mutex_lock(&dev->ctrl_urb_lock);
 285         ret = usb_control_msg(dev->udev, pipe, req,
 286                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 287                               val, reg, dev->urb_buf, len, HZ);
 288         if (ret < 0) {
 289                 cx231xx_isocdbg(" failed!\n");
 290                 /* mutex_unlock(&dev->ctrl_urb_lock); */
 291                 return ret;
 292         }
 293
 294         if (len)
 295                 memcpy(buf, dev->urb_buf, len);
 296
 297         mutex_unlock(&dev->ctrl_urb_lock);
 298
 299         if (reg_debug) {
 300                 int byte;
 301
 302                 cx231xx_isocdbg("<<<");
 303                 for (byte = 0; byte < len; byte++)
 304                         cx231xx_isocdbg(" %02x", (unsigned char)buf[byte]);
 305                 cx231xx_isocdbg("\n");
 306         }
 307
 308         return ret;
 309 }
 310
 311 int cx231xx_send_vendor_cmd(struct cx231xx *dev,
 312                                 struct VENDOR_REQUEST_IN *ven_req)
 313 {
 314         int ret;
 315         int pipe = 0;
 316
 317         if (dev->state & DEV_DISCONNECTED)
 318                 return -ENODEV;
 319
 320         if ((ven_req->wLength > URB_MAX_CTRL_SIZE))
 321                 return -EINVAL;
 322
 323         if (ven_req->direction)
 324                 pipe = usb_rcvctrlpipe(dev->udev, 0);
 325         else
 326                 pipe = usb_sndctrlpipe(dev->udev, 0);
 327
 328         if (reg_debug) {
 329                 int byte;
 330
 331                 cx231xx_isocdbg("(pipe 0x%08x): "
 332                                 "OUT: %02x %02x %02x %04x %04x %04x >>>",
 333                                 pipe,
 334                                 ven_req->
 335                                 direction | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 336                                 ven_req->bRequest, 0, ven_req->wValue,
 337                                 ven_req->wIndex, ven_req->wLength);
 338
 339                 for (byte = 0; byte < ven_req->wLength; byte++)
 340                         cx231xx_isocdbg(" %02x",
 341                                         (unsigned char)ven_req->pBuff[byte]);
 342                 cx231xx_isocdbg("\n");
 343         }
 344
 345         mutex_lock(&dev->ctrl_urb_lock);
 346         ret = usb_control_msg(dev->udev, pipe, ven_req->bRequest,
 347                               ven_req->
 348                               direction | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 349                               ven_req->wValue, ven_req->wIndex, ven_req->pBuff,
 350                               ven_req->wLength, HZ);
 351         mutex_unlock(&dev->ctrl_urb_lock);
 352
 353         return ret;
 354 }
 355
 356 /*
 357  * cx231xx_write_ctrl_reg()
 358  * sends data to the usb device, specifying bRequest
 359  */
 360 int cx231xx_write_ctrl_reg(struct cx231xx *dev, u8 req, u16 reg, char *buf,
 361                            int len)
 362 {
 363         u8 val = 0;
 364         int ret;
 365         int pipe = usb_sndctrlpipe(dev->udev, 0);
 366
 367         if (dev->state & DEV_DISCONNECTED)
 368                 return -ENODEV;
 369
 370         if ((len < 1) || (len > URB_MAX_CTRL_SIZE))
 371                 return -EINVAL;
 372
 373         switch (len) {
 374         case 1:
 375                 val = ENABLE_ONE_BYTE;
 376                 break;
 377         case 2:
 378                 val = ENABLE_TWE_BYTE;
 379                 break;
 380         case 3:
 381                 val = ENABLE_THREE_BYTE;
 382                 break;
 383         case 4:
 384                 val = ENABLE_FOUR_BYTE;
 385                 break;
 386         default:
 387                 val = 0xFF;     /* invalid option */
 388         }
 389
 390         if (val == 0xFF)
 391                 return -EINVAL;
 392
 393         if (reg_debug) {
 394                 int byte;
 395
 396                 cx231xx_isocdbg("(pipe 0x%08x): "
 397                         "OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>>",
 398                         pipe,
 399                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 400                         req, 0, val, reg & 0xff,
 401                         reg >> 8, len & 0xff, len >> 8);
 402
 403                 for (byte = 0; byte < len; byte++)
 404                         cx231xx_isocdbg(" %02x", (unsigned char)buf[byte]);
 405                 cx231xx_isocdbg("\n");
 406         }
 407
 408         mutex_lock(&dev->ctrl_urb_lock);
 409         memcpy(dev->urb_buf, buf, len);
 410         ret = usb_control_msg(dev->udev, pipe, req,
 411                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 412                               val, reg, dev->urb_buf, len, HZ);
 413         mutex_unlock(&dev->ctrl_urb_lock);
 414
 415         return ret;
 416 }
 417
 418 /****************************************************************
 419 *           USB Alternate Setting functions                     *
 420 *****************************************************************/
 421
 422 int cx231xx_set_video_alternate(struct cx231xx *dev)
 423 {
 424         int errCode, prev_alt = dev->video_mode.alt;
 425         unsigned int min_pkt_size = dev->width * 2 + 4;
 426         u32 usb_interface_index = 0;
 427
 428         /* When image size is bigger than a certain value,
 429            the frame size should be increased, otherwise, only
 430            green screen will be received.
 431          */
 432         if (dev->width * 2 * dev->height > 720 * 240 * 2)
 433                 min_pkt_size *= 2;
 434
 435         if (dev->width > 360) {
 436                 /* resolutions: 720,704,640 */
 437                 dev->video_mode.alt = 3;
 438         } else if (dev->width > 180) {
 439                 /* resolutions: 360,352,320,240 */
 440                 dev->video_mode.alt = 2;
 441         } else if (dev->width > 0) {
 442                 /* resolutions: 180,176,160,128,88 */
 443                 dev->video_mode.alt = 1;
 444         } else {
 445                 /* Change to alt0 BULK to release USB bandwidth */
 446                 dev->video_mode.alt = 0;
 447         }
 448
 449         /* Get the correct video interface Index */
 450         usb_interface_index =
 451             dev->current_pcb_config.hs_config_info[0].interface_info.
 452             video_index + 1;
 453
 454         if (dev->video_mode.alt != prev_alt) {
 455                 cx231xx_coredbg("minimum isoc packet size: %u (alt=%d)\n",
 456                                 min_pkt_size, dev->video_mode.alt);
 457                 dev->video_mode.max_pkt_size =
 458                     dev->video_mode.alt_max_pkt_size[dev->video_mode.alt];
 459                 cx231xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n",
 460                                 dev->video_mode.alt,
 461                                 dev->video_mode.max_pkt_size);
 462                 cx231xx_info
 463                     (" setting alt %d with wMaxPktSize=%u , Interface = %d\n",
 464                      dev->video_mode.alt, dev->video_mode.max_pkt_size,
 465                      usb_interface_index);
 466                 errCode =
 467                     usb_set_interface(dev->udev, usb_interface_index,
 468                                       dev->video_mode.alt);
 469                 if (errCode < 0) {
 470                         cx231xx_errdev
 471                             ("cannot change alt number to %d (error=%i)\n",
 472                              dev->video_mode.alt, errCode);
 473                         return errCode;
 474                 }
 475         }
 476         return 0;
 477 }
 478
 479 int cx231xx_set_alt_setting(struct cx231xx *dev, u8 index, u8 alt)
 480 {
 481         int status = 0;
 482         u32 usb_interface_index = 0;
 483         u32 max_pkt_size = 0;
 484
 485         switch (index) {
 486         case INDEX_TS1:
 487                 usb_interface_index =
 488                     dev->current_pcb_config.hs_config_info[0].interface_info.
 489                     ts1_index + 1;
 490                 dev->video_mode.alt = alt;
 491                 if (dev->ts1_mode.alt_max_pkt_size != NULL)
 492                         max_pkt_size = dev->ts1_mode.max_pkt_size =
 493                             dev->ts1_mode.alt_max_pkt_size[dev->ts1_mode.alt];
 494                 break;
 495         case INDEX_TS2:
 496                 usb_interface_index =
 497                     dev->current_pcb_config.hs_config_info[0].interface_info.
 498                     ts2_index + 1;
 499                 break;
 500         case INDEX_AUDIO:
 501                 usb_interface_index =
 502                     dev->current_pcb_config.hs_config_info[0].interface_info.
 503                     audio_index + 1;
 504                 dev->adev.alt = alt;
 505                 if (dev->adev.alt_max_pkt_size != NULL)
 506                         max_pkt_size = dev->adev.max_pkt_size =
 507                             dev->adev.alt_max_pkt_size[dev->adev.alt];
 508                 break;
 509         case INDEX_VIDEO:
 510                 usb_interface_index =
 511                     dev->current_pcb_config.hs_config_info[0].interface_info.
 512                     video_index + 1;
 513                 dev->video_mode.alt = alt;
 514                 if (dev->video_mode.alt_max_pkt_size != NULL)
 515                         max_pkt_size = dev->video_mode.max_pkt_size =
 516                             dev->video_mode.alt_max_pkt_size[dev->video_mode.
 517                                                              alt];
 518                 break;
 519         case INDEX_VANC:
 520                 usb_interface_index =
 521                     dev->current_pcb_config.hs_config_info[0].interface_info.
 522                     vanc_index + 1;
 523                 dev->vbi_mode.alt = alt;
 524                 if (dev->vbi_mode.alt_max_pkt_size != NULL)
 525                         max_pkt_size = dev->vbi_mode.max_pkt_size =
 526                             dev->vbi_mode.alt_max_pkt_size[dev->vbi_mode.alt];
 527                 break;
 528         case INDEX_HANC:
 529                 usb_interface_index =
 530                     dev->current_pcb_config.hs_config_info[0].interface_info.
 531                     hanc_index + 1;
 532                 dev->sliced_cc_mode.alt = alt;
 533                 if (dev->sliced_cc_mode.alt_max_pkt_size != NULL)
 534                         max_pkt_size = dev->sliced_cc_mode.max_pkt_size =
 535                             dev->sliced_cc_mode.alt_max_pkt_size[dev->
 536                                                                  sliced_cc_mode.
 537                                                                  alt];
 538                 break;
 539         default:
 540                 break;
 541         }
 542
 543         if (alt > 0 && max_pkt_size == 0) {
 544                 cx231xx_errdev
 545                 ("can't change interface %d alt no. to %d: Max. Pkt size = 0\n",
 546                 usb_interface_index, alt);
 547                 return -1;
 548         }
 549
 550         cx231xx_info
 551             (" setting alternate %d with wMaxPacketSize=%u , Interface = %d\n",
 552              alt, max_pkt_size, usb_interface_index);
 553
 554         if (usb_interface_index > 0) {
 555                 status = usb_set_interface(dev->udev, usb_interface_index, alt);
 556                 if (status < 0) {
 557                         cx231xx_errdev
 558                         ("can't change interface %d alt no. to %d (err=%i)\n",
 559                         usb_interface_index, alt, status);
 560                         return status;
 561                 }
 562         }
 563
 564         return status;
 565 }
 566 EXPORT_SYMBOL_GPL(cx231xx_set_alt_setting);
 567
 568 int cx231xx_gpio_set(struct cx231xx *dev, struct cx231xx_reg_seq *gpio)
 569 {
 570         int rc = 0;
 571
 572         if (!gpio)
 573                 return rc;
 574
 575         /* Send GPIO reset sequences specified at board entry */
 576         while (gpio->sleep >= 0) {
 577                 rc = cx231xx_set_gpio_value(dev, gpio->bit, gpio->val);
 578                 if (rc < 0)
 579                         return rc;
 580
 581                 if (gpio->sleep > 0)
 582                         msleep(gpio->sleep);
 583
 584                 gpio++;
 585         }
 586         return rc;
 587 }
 588
 589 int cx231xx_set_mode(struct cx231xx *dev, enum cx231xx_mode set_mode)
 590 {
 591         if (dev->mode == set_mode)
 592                 return 0;
 593
 594         if (set_mode == CX231XX_SUSPEND) {
 595                 /* Set the chip in power saving mode */
 596                 dev->mode = set_mode;
 597         }
 598
 599         /* Resource is locked */
 600         if (dev->mode != CX231XX_SUSPEND)
 601                 return -EINVAL;
 602
 603         dev->mode = set_mode;
 604
 605         if (dev->mode == CX231XX_DIGITAL_MODE)
 606                 ;/* Set Digital power mode */
 607         else
 608                 ;/* Set Analog Power mode */
 609
 610         return 0;
 611 }
 612 EXPORT_SYMBOL_GPL(cx231xx_set_mode);
 613
 614 /*****************************************************************
 615 *                URB Streaming functions                         *
 616 ******************************************************************/
 617
 618 /*
 619  * IRQ callback, called by URB callback
 620  */
 621 static void cx231xx_irq_callback(struct urb *urb)
 622 {
 623         struct cx231xx_dmaqueue *dma_q = urb->context;
 624         struct cx231xx_video_mode *vmode =
 625             container_of(dma_q, struct cx231xx_video_mode, vidq);
 626         struct cx231xx *dev = container_of(vmode, struct cx231xx, video_mode);
 627         int rc, i;
 628
 629         switch (urb->status) {
 630         case 0:         /* success */
 631         case -ETIMEDOUT:        /* NAK */
 632                 break;
 633         case -ECONNRESET:       /* kill */
 634         case -ENOENT:
 635         case -ESHUTDOWN:
 636                 return;
 637         default:                /* error */
 638                 cx231xx_isocdbg("urb completition error %d.\n", urb->status);
 639                 break;
 640         }
 641
 642         /* Copy data from URB */
 643         spin_lock(&dev->video_mode.slock);
 644         rc = dev->video_mode.isoc_ctl.isoc_copy(dev, urb);
 645         spin_unlock(&dev->video_mode.slock);
 646
 647         /* Reset urb buffers */
 648         for (i = 0; i < urb->number_of_packets; i++) {
 649                 urb->iso_frame_desc[i].status = 0;
 650                 urb->iso_frame_desc[i].actual_length = 0;
 651         }
 652         urb->status = 0;
 653
 654         urb->status = usb_submit_urb(urb, GFP_ATOMIC);
 655         if (urb->status) {
 656                 cx231xx_isocdbg("urb resubmit failed (error=%i)\n",
 657                                 urb->status);
 658         }
 659 }
 660
 661 /*
 662  * Stop and Deallocate URBs
 663  */
 664 void cx231xx_uninit_isoc(struct cx231xx *dev)
 665 {
 666         struct urb *urb;
 667         int i;
 668
 669         cx231xx_isocdbg("cx231xx: called cx231xx_uninit_isoc\n");
 670
 671         dev->video_mode.isoc_ctl.nfields = -1;
 672         for (i = 0; i < dev->video_mode.isoc_ctl.num_bufs; i++) {
 673                 urb = dev->video_mode.isoc_ctl.urb[i];
 674                 if (urb) {
 675                         if (!irqs_disabled())
 676                                 usb_kill_urb(urb);
 677                         else
 678                                 usb_unlink_urb(urb);
 679
 680                         if (dev->video_mode.isoc_ctl.transfer_buffer[i]) {
 681                                 usb_buffer_free(dev->udev,
 682                                                 urb->transfer_buffer_length,
 683                                                 dev->video_mode.isoc_ctl.
 684                                                 transfer_buffer[i],
 685                                                 urb->transfer_dma);
 686                         }
 687                         usb_free_urb(urb);
 688                         dev->video_mode.isoc_ctl.urb[i] = NULL;
 689                 }
 690                 dev->video_mode.isoc_ctl.transfer_buffer[i] = NULL;
 691         }
 692
 693         kfree(dev->video_mode.isoc_ctl.urb);
 694         kfree(dev->video_mode.isoc_ctl.transfer_buffer);
 695
 696         dev->video_mode.isoc_ctl.urb = NULL;
 697         dev->video_mode.isoc_ctl.transfer_buffer = NULL;
 698         dev->video_mode.isoc_ctl.num_bufs = 0;
 699
 700         cx231xx_capture_start(dev, 0, Raw_Video);
 701 }
 702 EXPORT_SYMBOL_GPL(cx231xx_uninit_isoc);
 703
 704 /*
 705  * Allocate URBs and start IRQ
 706  */
 707 int cx231xx_init_isoc(struct cx231xx *dev, int max_packets,
 708                       int num_bufs, int max_pkt_size,
 709                       int (*isoc_copy) (struct cx231xx *dev, struct urb *urb))
 710 {
 711         struct cx231xx_dmaqueue *dma_q = &dev->video_mode.vidq;
 712         int i;
 713         int sb_size, pipe;
 714         struct urb *urb;
 715         int j, k;
 716         int rc;
 717
 718         cx231xx_isocdbg("cx231xx: called cx231xx_prepare_isoc\n");
 719
 720         dev->video_input = dev->video_input > 2 ? 2 : dev->video_input;
 721
 722         cx231xx_info("Setting Video mux to %d\n", dev->video_input);
 723         video_mux(dev, dev->video_input);
 724
 725         /* De-allocates all pending stuff */
 726         cx231xx_uninit_isoc(dev);
 727
 728         dev->video_mode.isoc_ctl.isoc_copy = isoc_copy;
 729         dev->video_mode.isoc_ctl.num_bufs = num_bufs;
 730         dma_q->pos = 0;
 731         dma_q->is_partial_line = 0;
 732         dma_q->last_sav = 0;
 733         dma_q->current_field = -1;
 734         dma_q->field1_done = 0;
 735         dma_q->lines_per_field = dev->height / 2;
 736         dma_q->bytes_left_in_line = dev->width << 1;
 737         dma_q->lines_completed = 0;
 738         for (i = 0; i < 8; i++)
 739                 dma_q->partial_buf[i] = 0;
 740
 741         dev->video_mode.isoc_ctl.urb =
 742             kzalloc(sizeof(void *) * num_bufs, GFP_KERNEL);
 743         if (!dev->video_mode.isoc_ctl.urb) {
 744                 cx231xx_errdev("cannot alloc memory for usb buffers\n");
 745                 return -ENOMEM;
 746         }
 747
 748         dev->video_mode.isoc_ctl.transfer_buffer =
 749             kzalloc(sizeof(void *) * num_bufs, GFP_KERNEL);
 750         if (!dev->video_mode.isoc_ctl.transfer_buffer) {
 751                 cx231xx_errdev("cannot allocate memory for usbtransfer\n");
 752                 kfree(dev->video_mode.isoc_ctl.urb);
 753                 return -ENOMEM;
 754         }
 755
 756         dev->video_mode.isoc_ctl.max_pkt_size = max_pkt_size;
 757         dev->video_mode.isoc_ctl.buf = NULL;
 758
 759         sb_size = max_packets * dev->video_mode.isoc_ctl.max_pkt_size;
 760
 761         /* allocate urbs and transfer buffers */
 762         for (i = 0; i < dev->video_mode.isoc_ctl.num_bufs; i++) {
 763                 urb = usb_alloc_urb(max_packets, GFP_KERNEL);
 764                 if (!urb) {
 765                         cx231xx_err("cannot alloc isoc_ctl.urb %i\n", i);
 766                         cx231xx_uninit_isoc(dev);
 767                         return -ENOMEM;
 768                 }
 769                 dev->video_mode.isoc_ctl.urb[i] = urb;
 770
 771                 dev->video_mode.isoc_ctl.transfer_buffer[i] =
 772                     usb_buffer_alloc(dev->udev, sb_size, GFP_KERNEL,
 773                                      &urb->transfer_dma);
 774                 if (!dev->video_mode.isoc_ctl.transfer_buffer[i]) {
 775                         cx231xx_err("unable to allocate %i bytes for transfer"
 776                                     " buffer %i%s\n",
 777                                     sb_size, i,
 778                                     in_interrupt() ? " while in int" : "");
 779                         cx231xx_uninit_isoc(dev);
 780                         return -ENOMEM;
 781                 }
 782                 memset(dev->video_mode.isoc_ctl.transfer_buffer[i], 0, sb_size);
 783
 784                 pipe =
 785                     usb_rcvisocpipe(dev->udev, dev->video_mode.end_point_addr);
 786
 787                 usb_fill_int_urb(urb, dev->udev, pipe,
 788                                  dev->video_mode.isoc_ctl.transfer_buffer[i],
 789                                  sb_size, cx231xx_irq_callback, dma_q, 1);
 790
 791                 urb->number_of_packets = max_packets;
 792                 urb->transfer_flags = URB_ISO_ASAP;
 793
 794                 k = 0;
 795                 for (j = 0; j < max_packets; j++) {
 796                         urb->iso_frame_desc[j].offset = k;
 797                         urb->iso_frame_desc[j].length =
 798                             dev->video_mode.isoc_ctl.max_pkt_size;
 799                         k += dev->video_mode.isoc_ctl.max_pkt_size;
 800                 }
 801         }
 802
 803         init_waitqueue_head(&dma_q->wq);
 804
 805         /* submit urbs and enables IRQ */
 806         for (i = 0; i < dev->video_mode.isoc_ctl.num_bufs; i++) {
 807                 rc = usb_submit_urb(dev->video_mode.isoc_ctl.urb[i],
 808                                     GFP_ATOMIC);
 809                 if (rc) {
 810                         cx231xx_err("submit of urb %i failed (error=%i)\n", i,
 811                                     rc);
 812                         cx231xx_uninit_isoc(dev);
 813                         return rc;
 814                 }
 815         }
 816
 817         cx231xx_capture_start(dev, 1, Raw_Video);
 818
 819         return 0;
 820 }
 821 EXPORT_SYMBOL_GPL(cx231xx_init_isoc);
 822
 823 /*****************************************************************
 824 *             Device Init/UnInit functions                       *
 825 ******************************************************************/
 826 int cx231xx_dev_init(struct cx231xx *dev)
 827 {
 828         int errCode = 0;
 829
 830         /* Initialize I2C bus */
 831
 832         /* External Master 1 Bus */
 833         dev->i2c_bus[0].nr = 0;
 834         dev->i2c_bus[0].dev = dev;
 835         dev->i2c_bus[0].i2c_period = I2C_SPEED_1M;      /* 1MHz */
 836         dev->i2c_bus[0].i2c_nostop = 0;
 837         dev->i2c_bus[0].i2c_reserve = 0;
 838
 839         /* External Master 2 Bus */
 840         dev->i2c_bus[1].nr = 1;
 841         dev->i2c_bus[1].dev = dev;
 842         dev->i2c_bus[1].i2c_period = I2C_SPEED_1M;      /* 1MHz */
 843         dev->i2c_bus[1].i2c_nostop = 0;
 844         dev->i2c_bus[1].i2c_reserve = 0;
 845
 846         /* Internal Master 3 Bus */
 847         dev->i2c_bus[2].nr = 2;
 848         dev->i2c_bus[2].dev = dev;
 849         dev->i2c_bus[2].i2c_period = I2C_SPEED_400K;    /* 400kHz */
 850         dev->i2c_bus[2].i2c_nostop = 0;
 851         dev->i2c_bus[2].i2c_reserve = 0;
 852
 853         /* register I2C buses */
 854         cx231xx_i2c_register(&dev->i2c_bus[0]);
 855         cx231xx_i2c_register(&dev->i2c_bus[1]);
 856         cx231xx_i2c_register(&dev->i2c_bus[2]);
 857
 858         /* init hardware */
 859         /* Note : with out calling set power mode function,
 860         afe can not be set up correctly */
 861         errCode = cx231xx_set_power_mode(dev, POLARIS_AVMODE_ANALOGT_TV);
 862         if (errCode < 0) {
 863                 cx231xx_errdev
 864                     ("%s: Failed to set Power - errCode [%d]!\n",
 865                      __func__, errCode);
 866                 return errCode;
 867         }
 868
 869         /* initialize Colibri block */
 870         errCode = cx231xx_afe_init_super_block(dev, 0x23c);
 871         if (errCode < 0) {
 872                 cx231xx_errdev
 873                     ("%s: cx231xx_afe init super block - errCode [%d]!\n",
 874                      __func__, errCode);
 875                 return errCode;
 876         }
 877         errCode = cx231xx_afe_init_channels(dev);
 878         if (errCode < 0) {
 879                 cx231xx_errdev
 880                     ("%s: cx231xx_afe init channels - errCode [%d]!\n",
 881                      __func__, errCode);
 882                 return errCode;
 883         }
 884
 885         /* Set DIF in By pass mode */
 886         errCode = cx231xx_dif_set_standard(dev, DIF_USE_BASEBAND);
 887         if (errCode < 0) {
 888                 cx231xx_errdev
 889                     ("%s: cx231xx_dif set to By pass mode - errCode [%d]!\n",
 890                      __func__, errCode);
 891                 return errCode;
 892         }
 893
 894         /* I2S block related functions */
 895         errCode = cx231xx_i2s_blk_initialize(dev);
 896         if (errCode < 0) {
 897                 cx231xx_errdev
 898                     ("%s: cx231xx_i2s block initialize - errCode [%d]!\n",
 899                      __func__, errCode);
 900                 return errCode;
 901         }
 902
 903         /* init control pins */
 904         errCode = cx231xx_init_ctrl_pin_status(dev);
 905         if (errCode < 0) {
 906                 cx231xx_errdev("%s: cx231xx_init ctrl pins - errCode [%d]!\n",
 907                                __func__, errCode);
 908                 return errCode;
 909         }
 910
 911         /* set AGC mode to Analog */
 912         errCode = cx231xx_set_agc_analog_digital_mux_select(dev, 1);
 913         if (errCode < 0) {
 914                 cx231xx_errdev
 915                     ("%s: cx231xx_AGC mode to Analog - errCode [%d]!\n",
 916                      __func__, errCode);
 917                 return errCode;
 918         }
 919
 920         /* set all alternate settings to zero initially */
 921         cx231xx_set_alt_setting(dev, INDEX_VIDEO, 0);
 922         cx231xx_set_alt_setting(dev, INDEX_VANC, 0);
 923         cx231xx_set_alt_setting(dev, INDEX_HANC, 0);
 924         if (dev->board.has_dvb)
 925                 cx231xx_set_alt_setting(dev, INDEX_TS1, 0);
 926
 927         /* set the I2C master port to 3 on channel 1 */
 928         errCode = cx231xx_enable_i2c_for_tuner(dev, I2C_3);
 929
 930         return errCode;
 931 }
 932 EXPORT_SYMBOL_GPL(cx231xx_dev_init);
 933
 934 void cx231xx_dev_uninit(struct cx231xx *dev)
 935 {
 936         /* Un Initialize I2C bus */
 937         cx231xx_i2c_unregister(&dev->i2c_bus[2]);
 938         cx231xx_i2c_unregister(&dev->i2c_bus[1]);
 939         cx231xx_i2c_unregister(&dev->i2c_bus[0]);
 940 }
 941 EXPORT_SYMBOL_GPL(cx231xx_dev_uninit);
 942
 943 /*****************************************************************
 944 *              G P I O related functions                         *
 945 ******************************************************************/
 946 int cx231xx_send_gpio_cmd(struct cx231xx *dev, u32 gpio_bit, u8 * gpio_val,
 947                           u8 len, u8 request, u8 direction)
 948 {
 949         int status = 0;
 950         struct VENDOR_REQUEST_IN ven_req;
 951
 952         /* Set wValue */
 953         ven_req.wValue = (u16) (gpio_bit >> 16 & 0xffff);
 954
 955         /* set request */
 956         if (!request) {
 957                 if (direction)
 958                         ven_req.bRequest = VRT_GET_GPIO;        /* 0x8 gpio */
 959                 else
 960                         ven_req.bRequest = VRT_SET_GPIO;        /* 0x9 gpio */
 961         } else {
 962                 if (direction)
 963                         ven_req.bRequest = VRT_GET_GPIE;        /* 0xa gpie */
 964                 else
 965                         ven_req.bRequest = VRT_SET_GPIE;        /* 0xb gpie */
 966         }
 967
 968         /* set index value */
 969         ven_req.wIndex = (u16) (gpio_bit & 0xffff);
 970
 971         /* set wLength value */
 972         ven_req.wLength = len;
 973
 974         /* set bData value */
 975         ven_req.bData = 0;
 976
 977         /* set the buffer for read / write */
 978         ven_req.pBuff = gpio_val;
 979
 980         /* set the direction */
 981         if (direction) {
 982                 ven_req.direction = USB_DIR_IN;
 983                 memset(ven_req.pBuff, 0x00, ven_req.wLength);
 984         } else
 985                 ven_req.direction = USB_DIR_OUT;
 986
 987
 988         /* call common vendor command request */
 989         status = cx231xx_send_vendor_cmd(dev, &ven_req);
 990         if (status < 0) {
 991                 cx231xx_info
 992                     ("UsbInterface::sendCommand, failed with status -%d\n",
 993                      status);
 994         }
 995
 996         return status;
 997 }
 998 EXPORT_SYMBOL_GPL(cx231xx_send_gpio_cmd);
 999
1000 /*****************************************************************
1001  *    C O N T R O L - Register R E A D / W R I T E functions     *
1002  *****************************************************************/
1003 int cx231xx_mode_register(struct cx231xx *dev, u16 address, u32 mode)
1004 {
1005         u8 value[4] = { 0x0, 0x0, 0x0, 0x0 };
1006         u32 tmp = 0;
1007         int status = 0;
1008
1009         status =
1010             cx231xx_read_ctrl_reg(dev, VRT_GET_REGISTER, address, value, 4);
1011         if (status < 0)
1012                 return status;
1013
1014         tmp = *((u32 *) value);
1015         tmp |= mode;
1016
1017         value[0] = (u8) tmp;
1018         value[1] = (u8) (tmp >> 8);
1019         value[2] = (u8) (tmp >> 16);
1020         value[3] = (u8) (tmp >> 24);
1021
1022         status =
1023             cx231xx_write_ctrl_reg(dev, VRT_SET_REGISTER, address, value, 4);
1024
1025         return status;
1026 }
1027
1028 /*****************************************************************
1029  *            I 2 C Internal C O N T R O L   functions           *
1030  *****************************************************************/
1031 int cx231xx_read_i2c_data(struct cx231xx *dev, u8 dev_addr, u16 saddr,
1032                           u8 saddr_len, u32 *data, u8 data_len)
1033 {
1034         int status = 0;
1035         struct cx231xx_i2c_xfer_data req_data;
1036         u8 value[4] = { 0, 0, 0, 0 };
1037
1038         if (saddr_len == 0)
1039                 saddr = 0;
1040         else if (saddr_len == 0)
1041                 saddr &= 0xff;
1042
1043         /* prepare xfer_data struct */
1044         req_data.dev_addr = dev_addr >> 1;
1045         req_data.direction = I2C_M_RD;
1046         req_data.saddr_len = saddr_len;
1047         req_data.saddr_dat = saddr;
1048         req_data.buf_size = data_len;
1049         req_data.p_buffer = (u8 *) value;
1050
1051         /* usb send command */
1052         status = dev->cx231xx_send_usb_command(&dev->i2c_bus[0], &req_data);
1053
1054         if (status >= 0) {
1055                 /* Copy the data read back to main buffer */
1056                 if (data_len == 1)
1057                         *data = value[0];
1058                 else
1059                         *data =
1060                             value[0] | value[1] << 8 | value[2] << 16 | value[3]
1061                             << 24;
1062         }
1063
1064         return status;
1065 }
1066
1067 int cx231xx_write_i2c_data(struct cx231xx *dev, u8 dev_addr, u16 saddr,
1068                            u8 saddr_len, u32 data, u8 data_len)
1069 {
1070         int status = 0;
1071         u8 value[4] = { 0, 0, 0, 0 };
1072         struct cx231xx_i2c_xfer_data req_data;
1073
1074         value[0] = (u8) data;
1075         value[1] = (u8) (data >> 8);
1076         value[2] = (u8) (data >> 16);
1077         value[3] = (u8) (data >> 24);
1078
1079         if (saddr_len == 0)
1080                 saddr = 0;
1081         else if (saddr_len == 0)
1082                 saddr &= 0xff;
1083
1084         /* prepare xfer_data struct */
1085         req_data.dev_addr = dev_addr >> 1;
1086         req_data.direction = 0;
1087         req_data.saddr_len = saddr_len;
1088         req_data.saddr_dat = saddr;
1089         req_data.buf_size = data_len;
1090         req_data.p_buffer = value;
1091
1092         /* usb send command */
1093         status = dev->cx231xx_send_usb_command(&dev->i2c_bus[0], &req_data);
1094
1095         return status;
1096 }
1097
1098 int cx231xx_reg_mask_write(struct cx231xx *dev, u8 dev_addr, u8 size,
1099                            u16 register_address, u8 bit_start, u8 bit_end,
1100                            u32 value)
1101 {
1102         int status = 0;
1103         u32 tmp;
1104         u32 mask = 0;
1105         int i;
1106
1107         if (bit_start > (size - 1) || bit_end > (size - 1))
1108                 return -1;
1109
1110         if (size == 8) {
1111                 status =
1112                     cx231xx_read_i2c_data(dev, dev_addr, register_address, 2,
1113                                           &tmp, 1);
1114         } else {
1115                 status =
1116                     cx231xx_read_i2c_data(dev, dev_addr, register_address, 2,
1117                                           &tmp, 4);
1118         }
1119
1120         if (status < 0)
1121                 return status;
1122
1123         mask = 1 << bit_end;
1124         for (i = bit_end; i > bit_start && i > 0; i--)
1125                 mask = mask + (1 << (i - 1));
1126
1127         value <<= bit_start;
1128
1129         if (size == 8) {
1130                 tmp &= ~mask;
1131                 tmp |= value;
1132                 tmp &= 0xff;
1133                 status =
1134                     cx231xx_write_i2c_data(dev, dev_addr, register_address, 2,
1135                                            tmp, 1);
1136         } else {
1137                 tmp &= ~mask;
1138                 tmp |= value;
1139                 status =
1140                     cx231xx_write_i2c_data(dev, dev_addr, register_address, 2,
1141                                            tmp, 4);
1142         }
1143
1144         return status;
1145 }
1146
1147 int cx231xx_read_modify_write_i2c_dword(struct cx231xx *dev, u8 dev_addr,
1148                                         u16 saddr, u32 mask, u32 value)
1149 {
1150         u32 temp;
1151         int status = 0;
1152
1153         status = cx231xx_read_i2c_data(dev, dev_addr, saddr, 2, &temp, 4);
1154
1155         if (status < 0)
1156                 return status;
1157
1158         temp &= ~mask;
1159         temp |= value;
1160
1161         status = cx231xx_write_i2c_data(dev, dev_addr, saddr, 2, temp, 4);
1162
1163         return status;
1164 }
1165
1166 u32 cx231xx_set_field(u32 field_mask, u32 data)
1167 {
1168         u32 temp;
1169
1170         for (temp = field_mask; (temp & 1) == 0; temp >>= 1)
1171                 data <<= 1;
1172
1173         return data;
1174 }