drivers/media/usb/em28xx/em28xx-core.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // em28xx-core.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
   4 //
   5 // Copyright (C) 2005 Ludovico Cavedon <[email protected]>
   6 //                    Markus Rechberger <[email protected]>
   7 //                    Mauro Carvalho Chehab <[email protected]>
   8 //                    Sascha Sommer <[email protected]>
   9 // Copyright (C) 2012 Frank Schäfer <[email protected]>
  10
  11 #include "em28xx.h"
  12
  13 #include <linux/init.h>
  14 #include <linux/jiffies.h>
  15 #include <linux/list.h>
  16 #include <linux/module.h>
  17 #include <linux/slab.h>
  18 #include <linux/usb.h>
  19 #include <linux/vmalloc.h>
  20 #include <sound/ac97_codec.h>
  21 #include <media/v4l2-common.h>
  22
  23 #define DRIVER_AUTHOR "Ludovico Cavedon <[email protected]>, " \
  24                       "Markus Rechberger <[email protected]>, " \
  25                       "Mauro Carvalho Chehab <[email protected]>, " \
  26                       "Sascha Sommer <[email protected]>"
  27
  28 MODULE_AUTHOR(DRIVER_AUTHOR);
  29 MODULE_DESCRIPTION(DRIVER_DESC);
  30 MODULE_LICENSE("GPL v2");
  31 MODULE_VERSION(EM28XX_VERSION);
  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 and isoc]");
  38
  39 #define em28xx_coredbg(fmt, arg...) do {                                \
  40         if (core_debug)                                                 \
  41                 dev_printk(KERN_DEBUG, &dev->intf->dev,                 \
  42                            "core: %s: " fmt, __func__, ## arg);         \
  43 } while (0)
  44
  45 static unsigned int reg_debug;
  46 module_param(reg_debug, int, 0644);
  47 MODULE_PARM_DESC(reg_debug, "enable debug messages [URB reg]");
  48
  49 #define em28xx_regdbg(fmt, arg...) do {                         \
  50         if (reg_debug)                                                  \
  51                 dev_printk(KERN_DEBUG, &dev->intf->dev,                 \
  52                            "reg: %s: " fmt, __func__, ## arg);          \
  53 } while (0)
  54
  55 /* FIXME: don't abuse core_debug */
  56 #define em28xx_isocdbg(fmt, arg...) do {                                \
  57         if (core_debug)                                                 \
  58                 dev_printk(KERN_DEBUG, &dev->intf->dev,                 \
  59                            "core: %s: " fmt, __func__, ## arg);         \
  60 } while (0)
  61
  62 /*
  63  * em28xx_read_reg_req()
  64  * reads data from the usb device specifying bRequest
  65  */
  66 int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
  67                             char *buf, int len)
  68 {
  69         int ret;
  70         struct usb_device *udev = interface_to_usbdev(dev->intf);
  71         int pipe = usb_rcvctrlpipe(udev, 0);
  72
  73         if (dev->disconnected)
  74                 return -ENODEV;
  75
  76         if (len > URB_MAX_CTRL_SIZE)
  77                 return -EINVAL;
  78
  79         mutex_lock(&dev->ctrl_urb_lock);
  80         ret = usb_control_msg(udev, pipe, req,
  81                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  82                               0x0000, reg, dev->urb_buf, len, 1000);
  83         if (ret < 0) {
  84                 em28xx_regdbg("(pipe 0x%08x): IN:  %02x %02x %02x %02x %02x %02x %02x %02x  failed with error %i\n",
  85                               pipe,
  86                               USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  87                               req, 0, 0,
  88                               reg & 0xff, reg >> 8,
  89                               len & 0xff, len >> 8, ret);
  90                 mutex_unlock(&dev->ctrl_urb_lock);
  91                 return usb_translate_errors(ret);
  92         }
  93
  94         if (len)
  95                 memcpy(buf, dev->urb_buf, len);
  96
  97         mutex_unlock(&dev->ctrl_urb_lock);
  98
  99         em28xx_regdbg("(pipe 0x%08x): IN:  %02x %02x %02x %02x %02x %02x %02x %02x <<< %*ph\n",
 100                       pipe, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 101                       req, 0, 0,
 102                       reg & 0xff, reg >> 8,
 103                       len & 0xff, len >> 8, len, buf);
 104
 105         return ret;
 106 }
 107
 108 /*
 109  * em28xx_read_reg_req()
 110  * reads data from the usb device specifying bRequest
 111  */
 112 int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg)
 113 {
 114         int ret;
 115         u8 val;
 116
 117         ret = em28xx_read_reg_req_len(dev, req, reg, &val, 1);
 118         if (ret < 0)
 119                 return ret;
 120
 121         return val;
 122 }
 123
 124 int em28xx_read_reg(struct em28xx *dev, u16 reg)
 125 {
 126         return em28xx_read_reg_req(dev, USB_REQ_GET_STATUS, reg);
 127 }
 128 EXPORT_SYMBOL_GPL(em28xx_read_reg);
 129
 130 /*
 131  * em28xx_write_regs_req()
 132  * sends data to the usb device, specifying bRequest
 133  */
 134 int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
 135                           int len)
 136 {
 137         int ret;
 138         struct usb_device *udev = interface_to_usbdev(dev->intf);
 139         int pipe = usb_sndctrlpipe(udev, 0);
 140
 141         if (dev->disconnected)
 142                 return -ENODEV;
 143
 144         if (len < 1 || len > URB_MAX_CTRL_SIZE)
 145                 return -EINVAL;
 146
 147         mutex_lock(&dev->ctrl_urb_lock);
 148         memcpy(dev->urb_buf, buf, len);
 149         ret = usb_control_msg(udev, pipe, req,
 150                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 151                               0x0000, reg, dev->urb_buf, len, 1000);
 152         mutex_unlock(&dev->ctrl_urb_lock);
 153
 154         if (ret < 0) {
 155                 em28xx_regdbg("(pipe 0x%08x): OUT:  %02x %02x %02x %02x %02x %02x %02x %02x >>> %*ph  failed with error %i\n",
 156                               pipe,
 157                               USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 158                               req, 0, 0,
 159                               reg & 0xff, reg >> 8,
 160                               len & 0xff, len >> 8, len, buf, ret);
 161                 return usb_translate_errors(ret);
 162         }
 163
 164         em28xx_regdbg("(pipe 0x%08x): OUT:  %02x %02x %02x %02x %02x %02x %02x %02x >>> %*ph\n",
 165                       pipe,
 166                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 167                       req, 0, 0,
 168                       reg & 0xff, reg >> 8,
 169                       len & 0xff, len >> 8, len, buf);
 170
 171         if (dev->wait_after_write)
 172                 msleep(dev->wait_after_write);
 173
 174         return ret;
 175 }
 176
 177 int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len)
 178 {
 179         return em28xx_write_regs_req(dev, USB_REQ_GET_STATUS, reg, buf, len);
 180 }
 181 EXPORT_SYMBOL_GPL(em28xx_write_regs);
 182
 183 /* Write a single register */
 184 int em28xx_write_reg(struct em28xx *dev, u16 reg, u8 val)
 185 {
 186         return em28xx_write_regs(dev, reg, &val, 1);
 187 }
 188 EXPORT_SYMBOL_GPL(em28xx_write_reg);
 189
 190 /*
 191  * em28xx_write_reg_bits()
 192  * sets only some bits (specified by bitmask) of a register, by first reading
 193  * the actual value
 194  */
 195 int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val,
 196                           u8 bitmask)
 197 {
 198         int oldval;
 199         u8 newval;
 200
 201         oldval = em28xx_read_reg(dev, reg);
 202         if (oldval < 0)
 203                 return oldval;
 204
 205         newval = (((u8)oldval) & ~bitmask) | (val & bitmask);
 206
 207         return em28xx_write_regs(dev, reg, &newval, 1);
 208 }
 209 EXPORT_SYMBOL_GPL(em28xx_write_reg_bits);
 210
 211 /*
 212  * em28xx_toggle_reg_bits()
 213  * toggles/inverts the bits (specified by bitmask) of a register
 214  */
 215 int em28xx_toggle_reg_bits(struct em28xx *dev, u16 reg, u8 bitmask)
 216 {
 217         int oldval;
 218         u8 newval;
 219
 220         oldval = em28xx_read_reg(dev, reg);
 221         if (oldval < 0)
 222                 return oldval;
 223
 224         newval = (~oldval & bitmask) | (oldval & ~bitmask);
 225
 226         return em28xx_write_reg(dev, reg, newval);
 227 }
 228 EXPORT_SYMBOL_GPL(em28xx_toggle_reg_bits);
 229
 230 /*
 231  * em28xx_is_ac97_ready()
 232  * Checks if ac97 is ready
 233  */
 234 static int em28xx_is_ac97_ready(struct em28xx *dev)
 235 {
 236         unsigned long timeout = jiffies + msecs_to_jiffies(EM28XX_AC97_XFER_TIMEOUT);
 237         int ret;
 238
 239         /* Wait up to 50 ms for AC97 command to complete */
 240         while (time_is_after_jiffies(timeout)) {
 241                 ret = em28xx_read_reg(dev, EM28XX_R43_AC97BUSY);
 242                 if (ret < 0)
 243                         return ret;
 244
 245                 if (!(ret & 0x01))
 246                         return 0;
 247                 msleep(5);
 248         }
 249
 250         dev_warn(&dev->intf->dev,
 251                  "AC97 command still being executed: not handled properly!\n");
 252         return -EBUSY;
 253 }
 254
 255 /*
 256  * em28xx_read_ac97()
 257  * write a 16 bit value to the specified AC97 address (LSB first!)
 258  */
 259 int em28xx_read_ac97(struct em28xx *dev, u8 reg)
 260 {
 261         int ret;
 262         u8 addr = (reg & 0x7f) | 0x80;
 263         __le16 val;
 264
 265         ret = em28xx_is_ac97_ready(dev);
 266         if (ret < 0)
 267                 return ret;
 268
 269         ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1);
 270         if (ret < 0)
 271                 return ret;
 272
 273         ret = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R40_AC97LSB,
 274                                            (u8 *)&val, sizeof(val));
 275
 276         if (ret < 0)
 277                 return ret;
 278         return le16_to_cpu(val);
 279 }
 280 EXPORT_SYMBOL_GPL(em28xx_read_ac97);
 281
 282 /*
 283  * em28xx_write_ac97()
 284  * write a 16 bit value to the specified AC97 address (LSB first!)
 285  */
 286 int em28xx_write_ac97(struct em28xx *dev, u8 reg, u16 val)
 287 {
 288         int ret;
 289         u8 addr = reg & 0x7f;
 290         __le16 value;
 291
 292         value = cpu_to_le16(val);
 293
 294         ret = em28xx_is_ac97_ready(dev);
 295         if (ret < 0)
 296                 return ret;
 297
 298         ret = em28xx_write_regs(dev, EM28XX_R40_AC97LSB, (u8 *)&value, 2);
 299         if (ret < 0)
 300                 return ret;
 301
 302         ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1);
 303         if (ret < 0)
 304                 return ret;
 305
 306         return 0;
 307 }
 308 EXPORT_SYMBOL_GPL(em28xx_write_ac97);
 309
 310 struct em28xx_vol_itable {
 311         enum em28xx_amux mux;
 312         u8               reg;
 313 };
 314
 315 static struct em28xx_vol_itable inputs[] = {
 316         { EM28XX_AMUX_VIDEO,    AC97_VIDEO      },
 317         { EM28XX_AMUX_LINE_IN,  AC97_LINE       },
 318         { EM28XX_AMUX_PHONE,    AC97_PHONE      },
 319         { EM28XX_AMUX_MIC,      AC97_MIC        },
 320         { EM28XX_AMUX_CD,       AC97_CD         },
 321         { EM28XX_AMUX_AUX,      AC97_AUX        },
 322         { EM28XX_AMUX_PCM_OUT,  AC97_PCM        },
 323 };
 324
 325 static int set_ac97_input(struct em28xx *dev)
 326 {
 327         int ret, i;
 328         enum em28xx_amux amux = dev->ctl_ainput;
 329
 330         /*
 331          * EM28XX_AMUX_VIDEO2 is a special case used to indicate that
 332          * em28xx should point to LINE IN, while AC97 should use VIDEO
 333          */
 334         if (amux == EM28XX_AMUX_VIDEO2)
 335                 amux = EM28XX_AMUX_VIDEO;
 336
 337         /* Mute all entres but the one that were selected */
 338         for (i = 0; i < ARRAY_SIZE(inputs); i++) {
 339                 if (amux == inputs[i].mux)
 340                         ret = em28xx_write_ac97(dev, inputs[i].reg, 0x0808);
 341                 else
 342                         ret = em28xx_write_ac97(dev, inputs[i].reg, 0x8000);
 343
 344                 if (ret < 0)
 345                         dev_warn(&dev->intf->dev,
 346                                  "couldn't setup AC97 register %d\n",
 347                                  inputs[i].reg);
 348         }
 349         return 0;
 350 }
 351
 352 static int em28xx_set_audio_source(struct em28xx *dev)
 353 {
 354         int ret;
 355         u8 input;
 356
 357         if (dev->board.is_em2800) {
 358                 if (dev->ctl_ainput == EM28XX_AMUX_VIDEO)
 359                         input = EM2800_AUDIO_SRC_TUNER;
 360                 else
 361                         input = EM2800_AUDIO_SRC_LINE;
 362
 363                 ret = em28xx_write_regs(dev, EM2800_R08_AUDIOSRC, &input, 1);
 364                 if (ret < 0)
 365                         return ret;
 366         }
 367
 368         if (dev->has_msp34xx) {
 369                 input = EM28XX_AUDIO_SRC_TUNER;
 370         } else {
 371                 switch (dev->ctl_ainput) {
 372                 case EM28XX_AMUX_VIDEO:
 373                         input = EM28XX_AUDIO_SRC_TUNER;
 374                         break;
 375                 default:
 376                         input = EM28XX_AUDIO_SRC_LINE;
 377                         break;
 378                 }
 379         }
 380
 381         if (dev->board.mute_gpio && dev->mute)
 382                 em28xx_gpio_set(dev, dev->board.mute_gpio);
 383         else
 384                 em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio);
 385
 386         ret = em28xx_write_reg_bits(dev, EM28XX_R0E_AUDIOSRC, input, 0xc0);
 387         if (ret < 0)
 388                 return ret;
 389         usleep_range(10000, 11000);
 390
 391         switch (dev->audio_mode.ac97) {
 392         case EM28XX_NO_AC97:
 393                 break;
 394         default:
 395                 ret = set_ac97_input(dev);
 396         }
 397
 398         return ret;
 399 }
 400
 401 struct em28xx_vol_otable {
 402         enum em28xx_aout mux;
 403         u8               reg;
 404 };
 405
 406 static const struct em28xx_vol_otable outputs[] = {
 407         { EM28XX_AOUT_MASTER, AC97_MASTER               },
 408         { EM28XX_AOUT_LINE,   AC97_HEADPHONE            },
 409         { EM28XX_AOUT_MONO,   AC97_MASTER_MONO          },
 410         { EM28XX_AOUT_LFE,    AC97_CENTER_LFE_MASTER    },
 411         { EM28XX_AOUT_SURR,   AC97_SURROUND_MASTER      },
 412 };
 413
 414 int em28xx_audio_analog_set(struct em28xx *dev)
 415 {
 416         int ret, i;
 417         u8 xclk;
 418
 419         if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE)
 420                 return 0;
 421
 422         /*
 423          * It is assumed that all devices use master volume for output.
 424          * It would be possible to use also line output.
 425          */
 426         if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
 427                 /* Mute all outputs */
 428                 for (i = 0; i < ARRAY_SIZE(outputs); i++) {
 429                         ret = em28xx_write_ac97(dev, outputs[i].reg, 0x8000);
 430                         if (ret < 0)
 431                                 dev_warn(&dev->intf->dev,
 432                                          "couldn't setup AC97 register %d\n",
 433                                          outputs[i].reg);
 434                 }
 435         }
 436
 437         xclk = dev->board.xclk & 0x7f;
 438         if (!dev->mute)
 439                 xclk |= EM28XX_XCLK_AUDIO_UNMUTE;
 440
 441         ret = em28xx_write_reg(dev, EM28XX_R0F_XCLK, xclk);
 442         if (ret < 0)
 443                 return ret;
 444         usleep_range(10000, 11000);
 445
 446         /* Selects the proper audio input */
 447         ret = em28xx_set_audio_source(dev);
 448
 449         /* Sets volume */
 450         if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
 451                 int vol;
 452
 453                 em28xx_write_ac97(dev, AC97_POWERDOWN, 0x4200);
 454                 em28xx_write_ac97(dev, AC97_EXTENDED_STATUS, 0x0031);
 455                 em28xx_write_ac97(dev, AC97_PCM_LR_ADC_RATE, 0xbb80);
 456
 457                 /* LSB: left channel - both channels with the same level */
 458                 vol = (0x1f - dev->volume) | ((0x1f - dev->volume) << 8);
 459
 460                 /* Mute device, if needed */
 461                 if (dev->mute)
 462                         vol |= 0x8000;
 463
 464                 /* Sets volume */
 465                 for (i = 0; i < ARRAY_SIZE(outputs); i++) {
 466                         if (dev->ctl_aoutput & outputs[i].mux)
 467                                 ret = em28xx_write_ac97(dev, outputs[i].reg,
 468                                                         vol);
 469                         if (ret < 0)
 470                                 dev_warn(&dev->intf->dev,
 471                                          "couldn't setup AC97 register %d\n",
 472                                          outputs[i].reg);
 473                 }
 474
 475                 if (dev->ctl_aoutput & EM28XX_AOUT_PCM_IN) {
 476                         int sel = ac97_return_record_select(dev->ctl_aoutput);
 477
 478                         /*
 479                          * Use the same input for both left and right
 480                          * channels
 481                          */
 482                         sel |= (sel << 8);
 483
 484                         em28xx_write_ac97(dev, AC97_REC_SEL, sel);
 485                 }
 486         }
 487
 488         return ret;
 489 }
 490 EXPORT_SYMBOL_GPL(em28xx_audio_analog_set);
 491
 492 int em28xx_audio_setup(struct em28xx *dev)
 493 {
 494         int vid1, vid2, feat, cfg;
 495         u32 vid = 0;
 496         u8 i2s_samplerates;
 497
 498         if (dev->chip_id == CHIP_ID_EM2870 ||
 499             dev->chip_id == CHIP_ID_EM2874 ||
 500             dev->chip_id == CHIP_ID_EM28174 ||
 501             dev->chip_id == CHIP_ID_EM28178) {
 502                 /* Digital only device - don't load any alsa module */
 503                 dev->int_audio_type = EM28XX_INT_AUDIO_NONE;
 504                 dev->usb_audio_type = EM28XX_USB_AUDIO_NONE;
 505                 return 0;
 506         }
 507
 508         /* See how this device is configured */
 509         cfg = em28xx_read_reg(dev, EM28XX_R00_CHIPCFG);
 510         dev_info(&dev->intf->dev, "Config register raw data: 0x%02x\n", cfg);
 511         if (cfg < 0) { /* Register read error */
 512                 /* Be conservative */
 513                 dev->int_audio_type = EM28XX_INT_AUDIO_AC97;
 514         } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) == 0x00) {
 515                 /* The device doesn't have vendor audio at all */
 516                 dev->int_audio_type = EM28XX_INT_AUDIO_NONE;
 517                 dev->usb_audio_type = EM28XX_USB_AUDIO_NONE;
 518                 return 0;
 519         } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) != EM28XX_CHIPCFG_AC97) {
 520                 dev->int_audio_type = EM28XX_INT_AUDIO_I2S;
 521                 if (dev->chip_id < CHIP_ID_EM2860 &&
 522                     (cfg & EM28XX_CHIPCFG_AUDIOMASK) ==
 523                     EM2820_CHIPCFG_I2S_1_SAMPRATE)
 524                         i2s_samplerates = 1;
 525                 else if (dev->chip_id >= CHIP_ID_EM2860 &&
 526                          (cfg & EM28XX_CHIPCFG_AUDIOMASK) ==
 527                          EM2860_CHIPCFG_I2S_5_SAMPRATES)
 528                         i2s_samplerates = 5;
 529                 else
 530                         i2s_samplerates = 3;
 531                 dev_info(&dev->intf->dev, "I2S Audio (%d sample rate(s))\n",
 532                          i2s_samplerates);
 533                 /* Skip the code that does AC97 vendor detection */
 534                 dev->audio_mode.ac97 = EM28XX_NO_AC97;
 535                 goto init_audio;
 536         } else {
 537                 dev->int_audio_type = EM28XX_INT_AUDIO_AC97;
 538         }
 539
 540         dev->audio_mode.ac97 = EM28XX_AC97_OTHER;
 541
 542         vid1 = em28xx_read_ac97(dev, AC97_VENDOR_ID1);
 543         if (vid1 < 0) {
 544                 /*
 545                  * Device likely doesn't support AC97
 546                  * Note: (some) em2800 devices without eeprom reports 0x91 on
 547                  *       CHIPCFG register, even not having an AC97 chip
 548                  */
 549                 dev_warn(&dev->intf->dev,
 550                          "AC97 chip type couldn't be determined\n");
 551                 dev->audio_mode.ac97 = EM28XX_NO_AC97;
 552                 if (dev->usb_audio_type == EM28XX_USB_AUDIO_VENDOR)
 553                         dev->usb_audio_type = EM28XX_USB_AUDIO_NONE;
 554                 dev->int_audio_type = EM28XX_INT_AUDIO_NONE;
 555                 goto init_audio;
 556         }
 557
 558         vid2 = em28xx_read_ac97(dev, AC97_VENDOR_ID2);
 559         if (vid2 < 0)
 560                 goto init_audio;
 561
 562         vid = vid1 << 16 | vid2;
 563         dev_warn(&dev->intf->dev, "AC97 vendor ID = 0x%08x\n", vid);
 564
 565         feat = em28xx_read_ac97(dev, AC97_RESET);
 566         if (feat < 0)
 567                 goto init_audio;
 568
 569         dev_warn(&dev->intf->dev, "AC97 features = 0x%04x\n", feat);
 570
 571         /* Try to identify what audio processor we have */
 572         if ((vid == 0xffffffff || vid == 0x83847650) && feat == 0x6a90)
 573                 dev->audio_mode.ac97 = EM28XX_AC97_EM202;
 574         else if ((vid >> 8) == 0x838476)
 575                 dev->audio_mode.ac97 = EM28XX_AC97_SIGMATEL;
 576
 577 init_audio:
 578         /* Reports detected AC97 processor */
 579         switch (dev->audio_mode.ac97) {
 580         case EM28XX_NO_AC97:
 581                 dev_info(&dev->intf->dev, "No AC97 audio processor\n");
 582                 break;
 583         case EM28XX_AC97_EM202:
 584                 dev_info(&dev->intf->dev,
 585                          "Empia 202 AC97 audio processor detected\n");
 586                 break;
 587         case EM28XX_AC97_SIGMATEL:
 588                 dev_info(&dev->intf->dev,
 589                          "Sigmatel audio processor detected (stac 97%02x)\n",
 590                          vid & 0xff);
 591                 break;
 592         case EM28XX_AC97_OTHER:
 593                 dev_warn(&dev->intf->dev,
 594                          "Unknown AC97 audio processor detected!\n");
 595                 break;
 596         default:
 597                 break;
 598         }
 599
 600         return em28xx_audio_analog_set(dev);
 601 }
 602 EXPORT_SYMBOL_GPL(em28xx_audio_setup);
 603
 604 const struct em28xx_led *em28xx_find_led(struct em28xx *dev,
 605                                          enum em28xx_led_role role)
 606 {
 607         if (dev->board.leds) {
 608                 u8 k = 0;
 609
 610                 while (dev->board.leds[k].role >= 0 &&
 611                        dev->board.leds[k].role < EM28XX_NUM_LED_ROLES) {
 612                         if (dev->board.leds[k].role == role)
 613                                 return &dev->board.leds[k];
 614                         k++;
 615                 }
 616         }
 617         return NULL;
 618 }
 619 EXPORT_SYMBOL_GPL(em28xx_find_led);
 620
 621 int em28xx_capture_start(struct em28xx *dev, int start)
 622 {
 623         int rc;
 624         const struct em28xx_led *led = NULL;
 625
 626         if (dev->chip_id == CHIP_ID_EM2874 ||
 627             dev->chip_id == CHIP_ID_EM2884 ||
 628             dev->chip_id == CHIP_ID_EM28174 ||
 629             dev->chip_id == CHIP_ID_EM28178) {
 630                 /* The Transport Stream Enable Register moved in em2874 */
 631                 if (dev->dvb_xfer_bulk) {
 632                         /* Max Tx Size = 188 * 256 = 48128 - LCM(188,512) * 2 */
 633                         em28xx_write_reg(dev, (dev->ts == PRIMARY_TS) ?
 634                                          EM2874_R5D_TS1_PKT_SIZE :
 635                                          EM2874_R5E_TS2_PKT_SIZE,
 636                                          0xff);
 637                 } else {
 638                         /* ISOC Maximum Transfer Size = 188 * 5 */
 639                         em28xx_write_reg(dev, (dev->ts == PRIMARY_TS) ?
 640                                          EM2874_R5D_TS1_PKT_SIZE :
 641                                          EM2874_R5E_TS2_PKT_SIZE,
 642                                          dev->dvb_max_pkt_size_isoc / 188);
 643                 }
 644                 if (dev->ts == PRIMARY_TS)
 645                         rc = em28xx_write_reg_bits(dev,
 646                                                    EM2874_R5F_TS_ENABLE,
 647                                                    start ? EM2874_TS1_CAPTURE_ENABLE : 0x00,
 648                                                    EM2874_TS1_CAPTURE_ENABLE | EM2874_TS1_FILTER_ENABLE | EM2874_TS1_NULL_DISCARD);
 649                 else
 650                         rc = em28xx_write_reg_bits(dev,
 651                                                    EM2874_R5F_TS_ENABLE,
 652                                                    start ? EM2874_TS2_CAPTURE_ENABLE : 0x00,
 653                                                    EM2874_TS2_CAPTURE_ENABLE | EM2874_TS2_FILTER_ENABLE | EM2874_TS2_NULL_DISCARD);
 654         } else {
 655                 /* FIXME: which is the best order? */
 656                 /* video registers are sampled by VREF */
 657                 rc = em28xx_write_reg_bits(dev, EM28XX_R0C_USBSUSP,
 658                                            start ? 0x10 : 0x00, 0x10);
 659                 if (rc < 0)
 660                         return rc;
 661
 662                 if (start) {
 663                         if (dev->is_webcam)
 664                                 rc = em28xx_write_reg(dev, 0x13, 0x0c);
 665
 666                         /* Enable video capture */
 667                         rc = em28xx_write_reg(dev, 0x48, 0x00);
 668                         if (rc < 0)
 669                                 return rc;
 670
 671                         if (dev->mode == EM28XX_ANALOG_MODE)
 672                                 rc = em28xx_write_reg(dev,
 673                                                       EM28XX_R12_VINENABLE,
 674                                                       0x67);
 675                         else
 676                                 rc = em28xx_write_reg(dev,
 677                                                       EM28XX_R12_VINENABLE,
 678                                                       0x37);
 679                         if (rc < 0)
 680                                 return rc;
 681
 682                         usleep_range(10000, 11000);
 683                 } else {
 684                         /* disable video capture */
 685                         rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x27);
 686                 }
 687         }
 688
 689         if (dev->mode == EM28XX_ANALOG_MODE)
 690                 led = em28xx_find_led(dev, EM28XX_LED_ANALOG_CAPTURING);
 691         else if (dev->ts == PRIMARY_TS)
 692                 led = em28xx_find_led(dev, EM28XX_LED_DIGITAL_CAPTURING);
 693         else
 694                 led = em28xx_find_led(dev, EM28XX_LED_DIGITAL_CAPTURING_TS2);
 695
 696         if (led)
 697                 em28xx_write_reg_bits(dev, led->gpio_reg,
 698                                       (!start ^ led->inverted) ?
 699                                       ~led->gpio_mask : led->gpio_mask,
 700                                       led->gpio_mask);
 701
 702         return rc;
 703 }
 704
 705 int em28xx_gpio_set(struct em28xx *dev, const struct em28xx_reg_seq *gpio)
 706 {
 707         int rc = 0;
 708
 709         if (!gpio)
 710                 return rc;
 711
 712         if (dev->mode != EM28XX_SUSPEND) {
 713                 em28xx_write_reg(dev, 0x48, 0x00);
 714                 if (dev->mode == EM28XX_ANALOG_MODE)
 715                         em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x67);
 716                 else
 717                         em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x37);
 718                 usleep_range(10000, 11000);
 719         }
 720
 721         /* Send GPIO reset sequences specified at board entry */
 722         while (gpio->sleep >= 0) {
 723                 if (gpio->reg >= 0) {
 724                         rc = em28xx_write_reg_bits(dev,
 725                                                    gpio->reg,
 726                                                    gpio->val,
 727                                                    gpio->mask);
 728                         if (rc < 0)
 729                                 return rc;
 730                 }
 731                 if (gpio->sleep > 0)
 732                         msleep(gpio->sleep);
 733
 734                 gpio++;
 735         }
 736         return rc;
 737 }
 738 EXPORT_SYMBOL_GPL(em28xx_gpio_set);
 739
 740 int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode)
 741 {
 742         if (dev->mode == set_mode)
 743                 return 0;
 744
 745         if (set_mode == EM28XX_SUSPEND) {
 746                 dev->mode = set_mode;
 747
 748                 /* FIXME: add suspend support for ac97 */
 749
 750                 return em28xx_gpio_set(dev, dev->board.suspend_gpio);
 751         }
 752
 753         dev->mode = set_mode;
 754
 755         if (dev->mode == EM28XX_DIGITAL_MODE)
 756                 return em28xx_gpio_set(dev, dev->board.dvb_gpio);
 757         else
 758                 return em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio);
 759 }
 760 EXPORT_SYMBOL_GPL(em28xx_set_mode);
 761
 762 /*
 763  *URB control
 764  */
 765
 766 /*
 767  * URB completion handler for isoc/bulk transfers
 768  */
 769 static void em28xx_irq_callback(struct urb *urb)
 770 {
 771         struct em28xx *dev = urb->context;
 772         unsigned long flags;
 773         int i;
 774
 775         switch (urb->status) {
 776         case 0:             /* success */
 777         case -ETIMEDOUT:    /* NAK */
 778                 break;
 779         case -ECONNRESET:   /* kill */
 780         case -ENOENT:
 781         case -ESHUTDOWN:
 782                 return;
 783         default:            /* error */
 784                 em28xx_isocdbg("urb completion error %d.\n", urb->status);
 785                 break;
 786         }
 787
 788         /* Copy data from URB */
 789         spin_lock_irqsave(&dev->slock, flags);
 790         dev->usb_ctl.urb_data_copy(dev, urb);
 791         spin_unlock_irqrestore(&dev->slock, flags);
 792
 793         /* Reset urb buffers */
 794         for (i = 0; i < urb->number_of_packets; i++) {
 795                 /* isoc only (bulk: number_of_packets = 0) */
 796                 urb->iso_frame_desc[i].status = 0;
 797                 urb->iso_frame_desc[i].actual_length = 0;
 798         }
 799         urb->status = 0;
 800
 801         urb->status = usb_submit_urb(urb, GFP_ATOMIC);
 802         if (urb->status) {
 803                 em28xx_isocdbg("urb resubmit failed (error=%i)\n",
 804                                urb->status);
 805         }
 806 }
 807
 808 /*
 809  * Stop and Deallocate URBs
 810  */
 811 void em28xx_uninit_usb_xfer(struct em28xx *dev, enum em28xx_mode mode)
 812 {
 813         struct urb *urb;
 814         struct em28xx_usb_bufs *usb_bufs;
 815         int i;
 816
 817         em28xx_isocdbg("called %s in mode %d\n", __func__, mode);
 818
 819         if (mode == EM28XX_DIGITAL_MODE)
 820                 usb_bufs = &dev->usb_ctl.digital_bufs;
 821         else
 822                 usb_bufs = &dev->usb_ctl.analog_bufs;
 823
 824         for (i = 0; i < usb_bufs->num_bufs; i++) {
 825                 urb = usb_bufs->urb[i];
 826                 if (urb) {
 827                         if (!irqs_disabled())
 828                                 usb_kill_urb(urb);
 829                         else
 830                                 usb_unlink_urb(urb);
 831
 832                         usb_free_urb(urb);
 833                         usb_bufs->urb[i] = NULL;
 834                 }
 835         }
 836
 837         kfree(usb_bufs->urb);
 838         kfree(usb_bufs->buf);
 839
 840         usb_bufs->urb = NULL;
 841         usb_bufs->buf = NULL;
 842         usb_bufs->num_bufs = 0;
 843
 844         em28xx_capture_start(dev, 0);
 845 }
 846 EXPORT_SYMBOL_GPL(em28xx_uninit_usb_xfer);
 847
 848 /*
 849  * Stop URBs
 850  */
 851 void em28xx_stop_urbs(struct em28xx *dev)
 852 {
 853         int i;
 854         struct urb *urb;
 855         struct em28xx_usb_bufs *isoc_bufs = &dev->usb_ctl.digital_bufs;
 856
 857         em28xx_isocdbg("called %s\n", __func__);
 858
 859         for (i = 0; i < isoc_bufs->num_bufs; i++) {
 860                 urb = isoc_bufs->urb[i];
 861                 if (urb) {
 862                         if (!irqs_disabled())
 863                                 usb_kill_urb(urb);
 864                         else
 865                                 usb_unlink_urb(urb);
 866                 }
 867         }
 868
 869         em28xx_capture_start(dev, 0);
 870 }
 871 EXPORT_SYMBOL_GPL(em28xx_stop_urbs);
 872
 873 /*
 874  * Allocate URBs
 875  */
 876 int em28xx_alloc_urbs(struct em28xx *dev, enum em28xx_mode mode, int xfer_bulk,
 877                       int num_bufs, int max_pkt_size, int packet_multiplier)
 878 {
 879         struct em28xx_usb_bufs *usb_bufs;
 880         struct urb *urb;
 881         struct usb_device *udev = interface_to_usbdev(dev->intf);
 882         int i;
 883         int sb_size, pipe;
 884         int j, k;
 885
 886         em28xx_isocdbg("em28xx: called %s in mode %d\n", __func__, mode);
 887
 888         /*
 889          * Check mode and if we have an endpoint for the selected
 890          * transfer type, select buffer
 891          */
 892         if (mode == EM28XX_DIGITAL_MODE) {
 893                 if ((xfer_bulk && !dev->dvb_ep_bulk) ||
 894                     (!xfer_bulk && !dev->dvb_ep_isoc)) {
 895                         dev_err(&dev->intf->dev,
 896                                 "no endpoint for DVB mode and transfer type %d\n",
 897                                 xfer_bulk > 0);
 898                         return -EINVAL;
 899                 }
 900                 usb_bufs = &dev->usb_ctl.digital_bufs;
 901         } else if (mode == EM28XX_ANALOG_MODE) {
 902                 if ((xfer_bulk && !dev->analog_ep_bulk) ||
 903                     (!xfer_bulk && !dev->analog_ep_isoc)) {
 904                         dev_err(&dev->intf->dev,
 905                                 "no endpoint for analog mode and transfer type %d\n",
 906                                 xfer_bulk > 0);
 907                         return -EINVAL;
 908                 }
 909                 usb_bufs = &dev->usb_ctl.analog_bufs;
 910         } else {
 911                 dev_err(&dev->intf->dev, "invalid mode selected\n");
 912                 return -EINVAL;
 913         }
 914
 915         /* De-allocates all pending stuff */
 916         em28xx_uninit_usb_xfer(dev, mode);
 917
 918         usb_bufs->num_bufs = num_bufs;
 919
 920         usb_bufs->urb = kcalloc(num_bufs, sizeof(void *), GFP_KERNEL);
 921         if (!usb_bufs->urb)
 922                 return -ENOMEM;
 923
 924         usb_bufs->buf = kcalloc(num_bufs, sizeof(void *), GFP_KERNEL);
 925         if (!usb_bufs->buf) {
 926                 kfree(usb_bufs->urb);
 927                 return -ENOMEM;
 928         }
 929
 930         usb_bufs->max_pkt_size = max_pkt_size;
 931         if (xfer_bulk)
 932                 usb_bufs->num_packets = 0;
 933         else
 934                 usb_bufs->num_packets = packet_multiplier;
 935         dev->usb_ctl.vid_buf = NULL;
 936         dev->usb_ctl.vbi_buf = NULL;
 937
 938         sb_size = packet_multiplier * usb_bufs->max_pkt_size;
 939
 940         /* allocate urbs and transfer buffers */
 941         for (i = 0; i < usb_bufs->num_bufs; i++) {
 942                 urb = usb_alloc_urb(usb_bufs->num_packets, GFP_KERNEL);
 943                 if (!urb) {
 944                         em28xx_uninit_usb_xfer(dev, mode);
 945                         return -ENOMEM;
 946                 }
 947                 usb_bufs->urb[i] = urb;
 948
 949                 usb_bufs->buf[i] = kzalloc(sb_size, GFP_KERNEL);
 950                 if (!usb_bufs->buf[i]) {
 951                         for (i--; i >= 0; i--)
 952                                 kfree(usb_bufs->buf[i]);
 953
 954                         em28xx_uninit_usb_xfer(dev, mode);
 955                         return -ENOMEM;
 956                 }
 957
 958                 urb->transfer_flags = URB_FREE_BUFFER;
 959
 960                 if (xfer_bulk) { /* bulk */
 961                         pipe = usb_rcvbulkpipe(udev,
 962                                                mode == EM28XX_ANALOG_MODE ?
 963                                                dev->analog_ep_bulk :
 964                                                dev->dvb_ep_bulk);
 965                         usb_fill_bulk_urb(urb, udev, pipe, usb_bufs->buf[i],
 966                                           sb_size, em28xx_irq_callback, dev);
 967                 } else { /* isoc */
 968                         pipe = usb_rcvisocpipe(udev,
 969                                                mode == EM28XX_ANALOG_MODE ?
 970                                                dev->analog_ep_isoc :
 971                                                dev->dvb_ep_isoc);
 972                         usb_fill_int_urb(urb, udev, pipe, usb_bufs->buf[i],
 973                                          sb_size, em28xx_irq_callback, dev, 1);
 974                         urb->transfer_flags |= URB_ISO_ASAP;
 975                         k = 0;
 976                         for (j = 0; j < usb_bufs->num_packets; j++) {
 977                                 urb->iso_frame_desc[j].offset = k;
 978                                 urb->iso_frame_desc[j].length =
 979                                                         usb_bufs->max_pkt_size;
 980                                 k += usb_bufs->max_pkt_size;
 981                         }
 982                 }
 983
 984                 urb->number_of_packets = usb_bufs->num_packets;
 985         }
 986
 987         return 0;
 988 }
 989 EXPORT_SYMBOL_GPL(em28xx_alloc_urbs);
 990
 991 /*
 992  * Allocate URBs and start IRQ
 993  */
 994 int em28xx_init_usb_xfer(struct em28xx *dev, enum em28xx_mode mode,
 995                          int xfer_bulk, int num_bufs, int max_pkt_size,
 996                     int packet_multiplier,
 997                     int (*urb_data_copy)(struct em28xx *dev, struct urb *urb))
 998 {
 999         struct em28xx_dmaqueue *dma_q = &dev->vidq;
1000         struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
1001         struct em28xx_usb_bufs *usb_bufs;
1002         struct usb_device *udev = interface_to_usbdev(dev->intf);
1003         int i;
1004         int rc;
1005         int alloc;
1006
1007         em28xx_isocdbg("em28xx: called %s in mode %d\n", __func__, mode);
1008
1009         dev->usb_ctl.urb_data_copy = urb_data_copy;
1010
1011         if (mode == EM28XX_DIGITAL_MODE) {
1012                 usb_bufs = &dev->usb_ctl.digital_bufs;
1013                 /* no need to free/alloc usb buffers in digital mode */
1014                 alloc = 0;
1015         } else {
1016                 usb_bufs = &dev->usb_ctl.analog_bufs;
1017                 alloc = 1;
1018         }
1019
1020         if (alloc) {
1021                 rc = em28xx_alloc_urbs(dev, mode, xfer_bulk, num_bufs,
1022                                        max_pkt_size, packet_multiplier);
1023                 if (rc)
1024                         return rc;
1025         }
1026
1027         if (xfer_bulk) {
1028                 rc = usb_clear_halt(udev, usb_bufs->urb[0]->pipe);
1029                 if (rc < 0) {
1030                         dev_err(&dev->intf->dev,
1031                                 "failed to clear USB bulk endpoint stall/halt condition (error=%i)\n",
1032                                rc);
1033                         em28xx_uninit_usb_xfer(dev, mode);
1034                         return rc;
1035                 }
1036         }
1037
1038         init_waitqueue_head(&dma_q->wq);
1039         init_waitqueue_head(&vbi_dma_q->wq);
1040
1041         em28xx_capture_start(dev, 1);
1042
1043         /* submit urbs and enables IRQ */
1044         for (i = 0; i < usb_bufs->num_bufs; i++) {
1045                 rc = usb_submit_urb(usb_bufs->urb[i], GFP_KERNEL);
1046                 if (rc) {
1047                         dev_err(&dev->intf->dev,
1048                                 "submit of urb %i failed (error=%i)\n", i, rc);
1049                         em28xx_uninit_usb_xfer(dev, mode);
1050                         return rc;
1051                 }
1052         }
1053
1054         return 0;
1055 }
1056 EXPORT_SYMBOL_GPL(em28xx_init_usb_xfer);
1057
1058 /*
1059  * Device control list
1060  */
1061
1062 static LIST_HEAD(em28xx_devlist);
1063 static DEFINE_MUTEX(em28xx_devlist_mutex);
1064
1065 /*
1066  * Extension interface
1067  */
1068
1069 static LIST_HEAD(em28xx_extension_devlist);
1070
1071 int em28xx_register_extension(struct em28xx_ops *ops)
1072 {
1073         struct em28xx *dev = NULL;
1074
1075         mutex_lock(&em28xx_devlist_mutex);
1076         list_add_tail(&ops->next, &em28xx_extension_devlist);
1077         list_for_each_entry(dev, &em28xx_devlist, devlist) {
1078                 if (ops->init) {
1079                         ops->init(dev);
1080                         if (dev->dev_next)
1081                                 ops->init(dev->dev_next);
1082                 }
1083         }
1084         mutex_unlock(&em28xx_devlist_mutex);
1085         pr_info("em28xx: Registered (%s) extension\n", ops->name);
1086         return 0;
1087 }
1088 EXPORT_SYMBOL(em28xx_register_extension);
1089
1090 void em28xx_unregister_extension(struct em28xx_ops *ops)
1091 {
1092         struct em28xx *dev = NULL;
1093
1094         mutex_lock(&em28xx_devlist_mutex);
1095         list_for_each_entry(dev, &em28xx_devlist, devlist) {
1096                 if (ops->fini) {
1097                         if (dev->dev_next)
1098                                 ops->fini(dev->dev_next);
1099                         ops->fini(dev);
1100                 }
1101         }
1102         list_del(&ops->next);
1103         mutex_unlock(&em28xx_devlist_mutex);
1104         pr_info("em28xx: Removed (%s) extension\n", ops->name);
1105 }
1106 EXPORT_SYMBOL(em28xx_unregister_extension);
1107
1108 void em28xx_init_extension(struct em28xx *dev)
1109 {
1110         const struct em28xx_ops *ops = NULL;
1111
1112         mutex_lock(&em28xx_devlist_mutex);
1113         list_add_tail(&dev->devlist, &em28xx_devlist);
1114         list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1115                 if (ops->init) {
1116                         ops->init(dev);
1117                         if (dev->dev_next)
1118                                 ops->init(dev->dev_next);
1119                 }
1120         }
1121         mutex_unlock(&em28xx_devlist_mutex);
1122 }
1123
1124 void em28xx_close_extension(struct em28xx *dev)
1125 {
1126         const struct em28xx_ops *ops = NULL;
1127
1128         mutex_lock(&em28xx_devlist_mutex);
1129         list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1130                 if (ops->fini) {
1131                         if (dev->dev_next)
1132                                 ops->fini(dev->dev_next);
1133                         ops->fini(dev);
1134                 }
1135         }
1136         list_del(&dev->devlist);
1137         mutex_unlock(&em28xx_devlist_mutex);
1138 }
1139
1140 int em28xx_suspend_extension(struct em28xx *dev)
1141 {
1142         const struct em28xx_ops *ops = NULL;
1143
1144         dev_info(&dev->intf->dev, "Suspending extensions\n");
1145         mutex_lock(&em28xx_devlist_mutex);
1146         list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1147                 if (!ops->suspend)
1148                         continue;
1149                 ops->suspend(dev);
1150                 if (dev->dev_next)
1151                         ops->suspend(dev->dev_next);
1152         }
1153         mutex_unlock(&em28xx_devlist_mutex);
1154         return 0;
1155 }
1156
1157 int em28xx_resume_extension(struct em28xx *dev)
1158 {
1159         const struct em28xx_ops *ops = NULL;
1160
1161         dev_info(&dev->intf->dev, "Resuming extensions\n");
1162         mutex_lock(&em28xx_devlist_mutex);
1163         list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1164                 if (!ops->resume)
1165                         continue;
1166                 ops->resume(dev);
1167                 if (dev->dev_next)
1168                         ops->resume(dev->dev_next);
1169         }
1170         mutex_unlock(&em28xx_devlist_mutex);
1171         return 0;
1172 }