1 /* 2 em28xx-core.c - driver for Empia EM2800/EM2820/2840 USB video capture devices 3 4 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> 5 Markus Rechberger <mrechberger@gmail.com> 6 Mauro Carvalho Chehab <mchehab@infradead.org> 7 Sascha Sommer <saschasommer@freenet.de> 8 Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com> 9 10 This program is free software; you can redistribute it and/or modify 11 it under the terms of the GNU General Public License as published by 12 the Free Software Foundation; either version 2 of the License, or 13 (at your option) any later version. 14 15 This program is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with this program; if not, write to the Free Software 22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 23 */ 24 25 #include "em28xx.h" 26 27 #include <linux/init.h> 28 #include <linux/jiffies.h> 29 #include <linux/list.h> 30 #include <linux/module.h> 31 #include <linux/slab.h> 32 #include <linux/usb.h> 33 #include <linux/vmalloc.h> 34 #include <sound/ac97_codec.h> 35 #include <media/v4l2-common.h> 36 37 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \ 38 "Markus Rechberger <mrechberger@gmail.com>, " \ 39 "Mauro Carvalho Chehab <mchehab@infradead.org>, " \ 40 "Sascha Sommer <saschasommer@freenet.de>" 41 42 MODULE_AUTHOR(DRIVER_AUTHOR); 43 MODULE_DESCRIPTION(DRIVER_DESC); 44 MODULE_LICENSE("GPL"); 45 MODULE_VERSION(EM28XX_VERSION); 46 47 /* #define ENABLE_DEBUG_ISOC_FRAMES */ 48 49 static unsigned int core_debug; 50 module_param(core_debug, int, 0644); 51 MODULE_PARM_DESC(core_debug, "enable debug messages [core and isoc]"); 52 53 #define em28xx_coredbg(fmt, arg...) do { \ 54 if (core_debug) \ 55 dev_printk(KERN_DEBUG, &dev->intf->dev, \ 56 "core: %s: " fmt, __func__, ## arg); \ 57 } while (0) 58 59 static unsigned int reg_debug; 60 module_param(reg_debug, int, 0644); 61 MODULE_PARM_DESC(reg_debug, "enable debug messages [URB reg]"); 62 63 64 #define em28xx_regdbg(fmt, arg...) do { \ 65 if (reg_debug) \ 66 dev_printk(KERN_DEBUG, &dev->intf->dev, \ 67 "reg: %s: " fmt, __func__, ## arg); \ 68 } while (0) 69 70 /* FIXME: don't abuse core_debug */ 71 #define em28xx_isocdbg(fmt, arg...) do { \ 72 if (core_debug) \ 73 dev_printk(KERN_DEBUG, &dev->intf->dev, \ 74 "core: %s: " fmt, __func__, ## arg); \ 75 } while (0) 76 77 /* 78 * em28xx_read_reg_req() 79 * reads data from the usb device specifying bRequest 80 */ 81 int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg, 82 char *buf, int len) 83 { 84 int ret; 85 struct usb_device *udev = interface_to_usbdev(dev->intf); 86 int pipe = usb_rcvctrlpipe(udev, 0); 87 88 if (dev->disconnected) 89 return -ENODEV; 90 91 if (len > URB_MAX_CTRL_SIZE) 92 return -EINVAL; 93 94 em28xx_regdbg("(pipe 0x%08x): IN: %02x %02x %02x %02x %02x %02x %02x %02x ", 95 pipe, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 96 req, 0, 0, 97 reg & 0xff, reg >> 8, 98 len & 0xff, len >> 8); 99 100 mutex_lock(&dev->ctrl_urb_lock); 101 ret = usb_control_msg(udev, pipe, req, 102 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 103 0x0000, reg, dev->urb_buf, len, HZ); 104 if (ret < 0) { 105 em28xx_regdbg("(pipe 0x%08x): IN: %02x %02x %02x %02x %02x %02x %02x %02x failed\n", 106 pipe, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 107 req, 0, 0, 108 reg & 0xff, reg >> 8, 109 len & 0xff, len >> 8); 110 mutex_unlock(&dev->ctrl_urb_lock); 111 return usb_translate_errors(ret); 112 } 113 114 if (len) 115 memcpy(buf, dev->urb_buf, len); 116 117 mutex_unlock(&dev->ctrl_urb_lock); 118 119 em28xx_regdbg("(pipe 0x%08x): IN: %02x %02x %02x %02x %02x %02x %02x %02x failed <<< %*ph\n", 120 pipe, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 121 req, 0, 0, 122 reg & 0xff, reg >> 8, 123 len & 0xff, len >> 8, len, buf); 124 125 return ret; 126 } 127 128 /* 129 * em28xx_read_reg_req() 130 * reads data from the usb device specifying bRequest 131 */ 132 int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg) 133 { 134 int ret; 135 u8 val; 136 137 ret = em28xx_read_reg_req_len(dev, req, reg, &val, 1); 138 if (ret < 0) 139 return ret; 140 141 return val; 142 } 143 144 int em28xx_read_reg(struct em28xx *dev, u16 reg) 145 { 146 return em28xx_read_reg_req(dev, USB_REQ_GET_STATUS, reg); 147 } 148 EXPORT_SYMBOL_GPL(em28xx_read_reg); 149 150 /* 151 * em28xx_write_regs_req() 152 * sends data to the usb device, specifying bRequest 153 */ 154 int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf, 155 int len) 156 { 157 int ret; 158 struct usb_device *udev = interface_to_usbdev(dev->intf); 159 int pipe = usb_sndctrlpipe(udev, 0); 160 161 if (dev->disconnected) 162 return -ENODEV; 163 164 if ((len < 1) || (len > URB_MAX_CTRL_SIZE)) 165 return -EINVAL; 166 167 em28xx_regdbg("(pipe 0x%08x): OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>> %*ph\n", 168 pipe, 169 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 170 req, 0, 0, 171 reg & 0xff, reg >> 8, 172 len & 0xff, len >> 8, len, buf); 173 174 mutex_lock(&dev->ctrl_urb_lock); 175 memcpy(dev->urb_buf, buf, len); 176 ret = usb_control_msg(udev, pipe, req, 177 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 178 0x0000, reg, dev->urb_buf, len, HZ); 179 mutex_unlock(&dev->ctrl_urb_lock); 180 181 if (ret < 0) 182 return usb_translate_errors(ret); 183 184 if (dev->wait_after_write) 185 msleep(dev->wait_after_write); 186 187 return ret; 188 } 189 190 int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len) 191 { 192 return em28xx_write_regs_req(dev, USB_REQ_GET_STATUS, reg, buf, len); 193 } 194 EXPORT_SYMBOL_GPL(em28xx_write_regs); 195 196 /* Write a single register */ 197 int em28xx_write_reg(struct em28xx *dev, u16 reg, u8 val) 198 { 199 return em28xx_write_regs(dev, reg, &val, 1); 200 } 201 EXPORT_SYMBOL_GPL(em28xx_write_reg); 202 203 /* 204 * em28xx_write_reg_bits() 205 * sets only some bits (specified by bitmask) of a register, by first reading 206 * the actual value 207 */ 208 int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val, 209 u8 bitmask) 210 { 211 int oldval; 212 u8 newval; 213 214 oldval = em28xx_read_reg(dev, reg); 215 if (oldval < 0) 216 return oldval; 217 218 newval = (((u8)oldval) & ~bitmask) | (val & bitmask); 219 220 return em28xx_write_regs(dev, reg, &newval, 1); 221 } 222 EXPORT_SYMBOL_GPL(em28xx_write_reg_bits); 223 224 /* 225 * em28xx_toggle_reg_bits() 226 * toggles/inverts the bits (specified by bitmask) of a register 227 */ 228 int em28xx_toggle_reg_bits(struct em28xx *dev, u16 reg, u8 bitmask) 229 { 230 int oldval; 231 u8 newval; 232 233 oldval = em28xx_read_reg(dev, reg); 234 if (oldval < 0) 235 return oldval; 236 237 newval = (~oldval & bitmask) | (oldval & ~bitmask); 238 239 return em28xx_write_reg(dev, reg, newval); 240 } 241 EXPORT_SYMBOL_GPL(em28xx_toggle_reg_bits); 242 243 /* 244 * em28xx_is_ac97_ready() 245 * Checks if ac97 is ready 246 */ 247 static int em28xx_is_ac97_ready(struct em28xx *dev) 248 { 249 unsigned long timeout = jiffies + msecs_to_jiffies(EM28XX_AC97_XFER_TIMEOUT); 250 int ret; 251 252 /* Wait up to 50 ms for AC97 command to complete */ 253 while (time_is_after_jiffies(timeout)) { 254 ret = em28xx_read_reg(dev, EM28XX_R43_AC97BUSY); 255 if (ret < 0) 256 return ret; 257 258 if (!(ret & 0x01)) 259 return 0; 260 msleep(5); 261 } 262 263 dev_warn(&dev->intf->dev, 264 "AC97 command still being executed: not handled properly!\n"); 265 return -EBUSY; 266 } 267 268 /* 269 * em28xx_read_ac97() 270 * write a 16 bit value to the specified AC97 address (LSB first!) 271 */ 272 int em28xx_read_ac97(struct em28xx *dev, u8 reg) 273 { 274 int ret; 275 u8 addr = (reg & 0x7f) | 0x80; 276 __le16 val; 277 278 ret = em28xx_is_ac97_ready(dev); 279 if (ret < 0) 280 return ret; 281 282 ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1); 283 if (ret < 0) 284 return ret; 285 286 ret = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R40_AC97LSB, 287 (u8 *)&val, sizeof(val)); 288 289 if (ret < 0) 290 return ret; 291 return le16_to_cpu(val); 292 } 293 EXPORT_SYMBOL_GPL(em28xx_read_ac97); 294 295 /* 296 * em28xx_write_ac97() 297 * write a 16 bit value to the specified AC97 address (LSB first!) 298 */ 299 int em28xx_write_ac97(struct em28xx *dev, u8 reg, u16 val) 300 { 301 int ret; 302 u8 addr = reg & 0x7f; 303 __le16 value; 304 305 value = cpu_to_le16(val); 306 307 ret = em28xx_is_ac97_ready(dev); 308 if (ret < 0) 309 return ret; 310 311 ret = em28xx_write_regs(dev, EM28XX_R40_AC97LSB, (u8 *)&value, 2); 312 if (ret < 0) 313 return ret; 314 315 ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1); 316 if (ret < 0) 317 return ret; 318 319 return 0; 320 } 321 EXPORT_SYMBOL_GPL(em28xx_write_ac97); 322 323 struct em28xx_vol_itable { 324 enum em28xx_amux mux; 325 u8 reg; 326 }; 327 328 static struct em28xx_vol_itable inputs[] = { 329 { EM28XX_AMUX_VIDEO, AC97_VIDEO }, 330 { EM28XX_AMUX_LINE_IN, AC97_LINE }, 331 { EM28XX_AMUX_PHONE, AC97_PHONE }, 332 { EM28XX_AMUX_MIC, AC97_MIC }, 333 { EM28XX_AMUX_CD, AC97_CD }, 334 { EM28XX_AMUX_AUX, AC97_AUX }, 335 { EM28XX_AMUX_PCM_OUT, AC97_PCM }, 336 }; 337 338 static int set_ac97_input(struct em28xx *dev) 339 { 340 int ret, i; 341 enum em28xx_amux amux = dev->ctl_ainput; 342 343 /* EM28XX_AMUX_VIDEO2 is a special case used to indicate that 344 em28xx should point to LINE IN, while AC97 should use VIDEO 345 */ 346 if (amux == EM28XX_AMUX_VIDEO2) 347 amux = EM28XX_AMUX_VIDEO; 348 349 /* Mute all entres but the one that were selected */ 350 for (i = 0; i < ARRAY_SIZE(inputs); i++) { 351 if (amux == inputs[i].mux) 352 ret = em28xx_write_ac97(dev, inputs[i].reg, 0x0808); 353 else 354 ret = em28xx_write_ac97(dev, inputs[i].reg, 0x8000); 355 356 if (ret < 0) 357 dev_warn(&dev->intf->dev, 358 "couldn't setup AC97 register %d\n", 359 inputs[i].reg); 360 } 361 return 0; 362 } 363 364 static int em28xx_set_audio_source(struct em28xx *dev) 365 { 366 int ret; 367 u8 input; 368 369 if (dev->board.is_em2800) { 370 if (dev->ctl_ainput == EM28XX_AMUX_VIDEO) 371 input = EM2800_AUDIO_SRC_TUNER; 372 else 373 input = EM2800_AUDIO_SRC_LINE; 374 375 ret = em28xx_write_regs(dev, EM2800_R08_AUDIOSRC, &input, 1); 376 if (ret < 0) 377 return ret; 378 } 379 380 if (dev->board.has_msp34xx) 381 input = EM28XX_AUDIO_SRC_TUNER; 382 else { 383 switch (dev->ctl_ainput) { 384 case EM28XX_AMUX_VIDEO: 385 input = EM28XX_AUDIO_SRC_TUNER; 386 break; 387 default: 388 input = EM28XX_AUDIO_SRC_LINE; 389 break; 390 } 391 } 392 393 if (dev->board.mute_gpio && dev->mute) 394 em28xx_gpio_set(dev, dev->board.mute_gpio); 395 else 396 em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio); 397 398 ret = em28xx_write_reg_bits(dev, EM28XX_R0E_AUDIOSRC, input, 0xc0); 399 if (ret < 0) 400 return ret; 401 msleep(5); 402 403 switch (dev->audio_mode.ac97) { 404 case EM28XX_NO_AC97: 405 break; 406 default: 407 ret = set_ac97_input(dev); 408 } 409 410 return ret; 411 } 412 413 struct em28xx_vol_otable { 414 enum em28xx_aout mux; 415 u8 reg; 416 }; 417 418 static const struct em28xx_vol_otable outputs[] = { 419 { EM28XX_AOUT_MASTER, AC97_MASTER }, 420 { EM28XX_AOUT_LINE, AC97_HEADPHONE }, 421 { EM28XX_AOUT_MONO, AC97_MASTER_MONO }, 422 { EM28XX_AOUT_LFE, AC97_CENTER_LFE_MASTER }, 423 { EM28XX_AOUT_SURR, AC97_SURROUND_MASTER }, 424 }; 425 426 int em28xx_audio_analog_set(struct em28xx *dev) 427 { 428 int ret, i; 429 u8 xclk; 430 431 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) 432 return 0; 433 434 /* It is assumed that all devices use master volume for output. 435 It would be possible to use also line output. 436 */ 437 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) { 438 /* Mute all outputs */ 439 for (i = 0; i < ARRAY_SIZE(outputs); i++) { 440 ret = em28xx_write_ac97(dev, outputs[i].reg, 0x8000); 441 if (ret < 0) 442 dev_warn(&dev->intf->dev, 443 "couldn't setup AC97 register %d\n", 444 outputs[i].reg); 445 } 446 } 447 448 xclk = dev->board.xclk & 0x7f; 449 if (!dev->mute) 450 xclk |= EM28XX_XCLK_AUDIO_UNMUTE; 451 452 ret = em28xx_write_reg(dev, EM28XX_R0F_XCLK, xclk); 453 if (ret < 0) 454 return ret; 455 msleep(10); 456 457 /* Selects the proper audio input */ 458 ret = em28xx_set_audio_source(dev); 459 460 /* Sets volume */ 461 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) { 462 int vol; 463 464 em28xx_write_ac97(dev, AC97_POWERDOWN, 0x4200); 465 em28xx_write_ac97(dev, AC97_EXTENDED_STATUS, 0x0031); 466 em28xx_write_ac97(dev, AC97_PCM_LR_ADC_RATE, 0xbb80); 467 468 /* LSB: left channel - both channels with the same level */ 469 vol = (0x1f - dev->volume) | ((0x1f - dev->volume) << 8); 470 471 /* Mute device, if needed */ 472 if (dev->mute) 473 vol |= 0x8000; 474 475 /* Sets volume */ 476 for (i = 0; i < ARRAY_SIZE(outputs); i++) { 477 if (dev->ctl_aoutput & outputs[i].mux) 478 ret = em28xx_write_ac97(dev, outputs[i].reg, 479 vol); 480 if (ret < 0) 481 dev_warn(&dev->intf->dev, 482 "couldn't setup AC97 register %d\n", 483 outputs[i].reg); 484 } 485 486 if (dev->ctl_aoutput & EM28XX_AOUT_PCM_IN) { 487 int sel = ac97_return_record_select(dev->ctl_aoutput); 488 489 /* Use the same input for both left and right 490 channels */ 491 sel |= (sel << 8); 492 493 em28xx_write_ac97(dev, AC97_REC_SEL, sel); 494 } 495 } 496 497 return ret; 498 } 499 EXPORT_SYMBOL_GPL(em28xx_audio_analog_set); 500 501 int em28xx_audio_setup(struct em28xx *dev) 502 { 503 int vid1, vid2, feat, cfg; 504 u32 vid = 0; 505 u8 i2s_samplerates; 506 507 if (dev->chip_id == CHIP_ID_EM2870 || 508 dev->chip_id == CHIP_ID_EM2874 || 509 dev->chip_id == CHIP_ID_EM28174 || 510 dev->chip_id == CHIP_ID_EM28178) { 511 /* Digital only device - don't load any alsa module */ 512 dev->int_audio_type = EM28XX_INT_AUDIO_NONE; 513 dev->usb_audio_type = EM28XX_USB_AUDIO_NONE; 514 return 0; 515 } 516 517 /* See how this device is configured */ 518 cfg = em28xx_read_reg(dev, EM28XX_R00_CHIPCFG); 519 dev_info(&dev->intf->dev, "Config register raw data: 0x%02x\n", cfg); 520 if (cfg < 0) { /* Register read error */ 521 /* Be conservative */ 522 dev->int_audio_type = EM28XX_INT_AUDIO_AC97; 523 } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) == 0x00) { 524 /* The device doesn't have vendor audio at all */ 525 dev->int_audio_type = EM28XX_INT_AUDIO_NONE; 526 dev->usb_audio_type = EM28XX_USB_AUDIO_NONE; 527 return 0; 528 } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) != EM28XX_CHIPCFG_AC97) { 529 dev->int_audio_type = EM28XX_INT_AUDIO_I2S; 530 if (dev->chip_id < CHIP_ID_EM2860 && 531 (cfg & EM28XX_CHIPCFG_AUDIOMASK) == 532 EM2820_CHIPCFG_I2S_1_SAMPRATE) 533 i2s_samplerates = 1; 534 else if (dev->chip_id >= CHIP_ID_EM2860 && 535 (cfg & EM28XX_CHIPCFG_AUDIOMASK) == 536 EM2860_CHIPCFG_I2S_5_SAMPRATES) 537 i2s_samplerates = 5; 538 else 539 i2s_samplerates = 3; 540 dev_info(&dev->intf->dev, "I2S Audio (%d sample rate(s))\n", 541 i2s_samplerates); 542 /* Skip the code that does AC97 vendor detection */ 543 dev->audio_mode.ac97 = EM28XX_NO_AC97; 544 goto init_audio; 545 } else { 546 dev->int_audio_type = EM28XX_INT_AUDIO_AC97; 547 } 548 549 dev->audio_mode.ac97 = EM28XX_AC97_OTHER; 550 551 vid1 = em28xx_read_ac97(dev, AC97_VENDOR_ID1); 552 if (vid1 < 0) { 553 /* 554 * Device likely doesn't support AC97 555 * Note: (some) em2800 devices without eeprom reports 0x91 on 556 * CHIPCFG register, even not having an AC97 chip 557 */ 558 dev_warn(&dev->intf->dev, 559 "AC97 chip type couldn't be determined\n"); 560 dev->audio_mode.ac97 = EM28XX_NO_AC97; 561 if (dev->usb_audio_type == EM28XX_USB_AUDIO_VENDOR) 562 dev->usb_audio_type = EM28XX_USB_AUDIO_NONE; 563 dev->int_audio_type = EM28XX_INT_AUDIO_NONE; 564 goto init_audio; 565 } 566 567 vid2 = em28xx_read_ac97(dev, AC97_VENDOR_ID2); 568 if (vid2 < 0) 569 goto init_audio; 570 571 vid = vid1 << 16 | vid2; 572 dev_warn(&dev->intf->dev, "AC97 vendor ID = 0x%08x\n", vid); 573 574 feat = em28xx_read_ac97(dev, AC97_RESET); 575 if (feat < 0) 576 goto init_audio; 577 578 dev_warn(&dev->intf->dev, "AC97 features = 0x%04x\n", feat); 579 580 /* Try to identify what audio processor we have */ 581 if (((vid == 0xffffffff) || (vid == 0x83847650)) && (feat == 0x6a90)) 582 dev->audio_mode.ac97 = EM28XX_AC97_EM202; 583 else if ((vid >> 8) == 0x838476) 584 dev->audio_mode.ac97 = EM28XX_AC97_SIGMATEL; 585 586 init_audio: 587 /* Reports detected AC97 processor */ 588 switch (dev->audio_mode.ac97) { 589 case EM28XX_NO_AC97: 590 dev_info(&dev->intf->dev, "No AC97 audio processor\n"); 591 break; 592 case EM28XX_AC97_EM202: 593 dev_info(&dev->intf->dev, 594 "Empia 202 AC97 audio processor detected\n"); 595 break; 596 case EM28XX_AC97_SIGMATEL: 597 dev_info(&dev->intf->dev, 598 "Sigmatel audio processor detected (stac 97%02x)\n", 599 vid & 0xff); 600 break; 601 case EM28XX_AC97_OTHER: 602 dev_warn(&dev->intf->dev, 603 "Unknown AC97 audio processor detected!\n"); 604 break; 605 default: 606 break; 607 } 608 609 return em28xx_audio_analog_set(dev); 610 } 611 EXPORT_SYMBOL_GPL(em28xx_audio_setup); 612 613 const struct em28xx_led *em28xx_find_led(struct em28xx *dev, 614 enum em28xx_led_role role) 615 { 616 if (dev->board.leds) { 617 u8 k = 0; 618 619 while (dev->board.leds[k].role >= 0 && 620 dev->board.leds[k].role < EM28XX_NUM_LED_ROLES) { 621 if (dev->board.leds[k].role == role) 622 return &dev->board.leds[k]; 623 k++; 624 } 625 } 626 return NULL; 627 } 628 EXPORT_SYMBOL_GPL(em28xx_find_led); 629 630 int em28xx_capture_start(struct em28xx *dev, int start) 631 { 632 int rc; 633 const struct em28xx_led *led = NULL; 634 635 if (dev->chip_id == CHIP_ID_EM2874 || 636 dev->chip_id == CHIP_ID_EM2884 || 637 dev->chip_id == CHIP_ID_EM28174 || 638 dev->chip_id == CHIP_ID_EM28178) { 639 /* The Transport Stream Enable Register moved in em2874 */ 640 rc = em28xx_write_reg_bits(dev, EM2874_R5F_TS_ENABLE, 641 start ? 642 EM2874_TS1_CAPTURE_ENABLE : 0x00, 643 EM2874_TS1_CAPTURE_ENABLE); 644 } else { 645 /* FIXME: which is the best order? */ 646 /* video registers are sampled by VREF */ 647 rc = em28xx_write_reg_bits(dev, EM28XX_R0C_USBSUSP, 648 start ? 0x10 : 0x00, 0x10); 649 if (rc < 0) 650 return rc; 651 652 if (start) { 653 if (dev->board.is_webcam) 654 rc = em28xx_write_reg(dev, 0x13, 0x0c); 655 656 /* Enable video capture */ 657 rc = em28xx_write_reg(dev, 0x48, 0x00); 658 if (rc < 0) 659 return rc; 660 661 if (dev->mode == EM28XX_ANALOG_MODE) 662 rc = em28xx_write_reg(dev, 663 EM28XX_R12_VINENABLE, 664 0x67); 665 else 666 rc = em28xx_write_reg(dev, 667 EM28XX_R12_VINENABLE, 668 0x37); 669 if (rc < 0) 670 return rc; 671 672 msleep(6); 673 } else { 674 /* disable video capture */ 675 rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x27); 676 } 677 } 678 679 if (dev->mode == EM28XX_ANALOG_MODE) 680 led = em28xx_find_led(dev, EM28XX_LED_ANALOG_CAPTURING); 681 else 682 led = em28xx_find_led(dev, EM28XX_LED_DIGITAL_CAPTURING); 683 684 if (led) 685 em28xx_write_reg_bits(dev, led->gpio_reg, 686 (!start ^ led->inverted) ? 687 ~led->gpio_mask : led->gpio_mask, 688 led->gpio_mask); 689 690 return rc; 691 } 692 693 int em28xx_gpio_set(struct em28xx *dev, struct em28xx_reg_seq *gpio) 694 { 695 int rc = 0; 696 697 if (!gpio) 698 return rc; 699 700 if (dev->mode != EM28XX_SUSPEND) { 701 em28xx_write_reg(dev, 0x48, 0x00); 702 if (dev->mode == EM28XX_ANALOG_MODE) 703 em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x67); 704 else 705 em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x37); 706 msleep(6); 707 } 708 709 /* Send GPIO reset sequences specified at board entry */ 710 while (gpio->sleep >= 0) { 711 if (gpio->reg >= 0) { 712 rc = em28xx_write_reg_bits(dev, 713 gpio->reg, 714 gpio->val, 715 gpio->mask); 716 if (rc < 0) 717 return rc; 718 } 719 if (gpio->sleep > 0) 720 msleep(gpio->sleep); 721 722 gpio++; 723 } 724 return rc; 725 } 726 EXPORT_SYMBOL_GPL(em28xx_gpio_set); 727 728 int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode) 729 { 730 if (dev->mode == set_mode) 731 return 0; 732 733 if (set_mode == EM28XX_SUSPEND) { 734 dev->mode = set_mode; 735 736 /* FIXME: add suspend support for ac97 */ 737 738 return em28xx_gpio_set(dev, dev->board.suspend_gpio); 739 } 740 741 dev->mode = set_mode; 742 743 if (dev->mode == EM28XX_DIGITAL_MODE) 744 return em28xx_gpio_set(dev, dev->board.dvb_gpio); 745 else 746 return em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio); 747 } 748 EXPORT_SYMBOL_GPL(em28xx_set_mode); 749 750 /* ------------------------------------------------------------------ 751 URB control 752 ------------------------------------------------------------------*/ 753 754 /* 755 * URB completion handler for isoc/bulk transfers 756 */ 757 static void em28xx_irq_callback(struct urb *urb) 758 { 759 struct em28xx *dev = urb->context; 760 int i; 761 762 switch (urb->status) { 763 case 0: /* success */ 764 case -ETIMEDOUT: /* NAK */ 765 break; 766 case -ECONNRESET: /* kill */ 767 case -ENOENT: 768 case -ESHUTDOWN: 769 return; 770 default: /* error */ 771 em28xx_isocdbg("urb completition error %d.\n", urb->status); 772 break; 773 } 774 775 /* Copy data from URB */ 776 spin_lock(&dev->slock); 777 dev->usb_ctl.urb_data_copy(dev, urb); 778 spin_unlock(&dev->slock); 779 780 /* Reset urb buffers */ 781 for (i = 0; i < urb->number_of_packets; i++) { 782 /* isoc only (bulk: number_of_packets = 0) */ 783 urb->iso_frame_desc[i].status = 0; 784 urb->iso_frame_desc[i].actual_length = 0; 785 } 786 urb->status = 0; 787 788 urb->status = usb_submit_urb(urb, GFP_ATOMIC); 789 if (urb->status) { 790 em28xx_isocdbg("urb resubmit failed (error=%i)\n", 791 urb->status); 792 } 793 } 794 795 /* 796 * Stop and Deallocate URBs 797 */ 798 void em28xx_uninit_usb_xfer(struct em28xx *dev, enum em28xx_mode mode) 799 { 800 struct urb *urb; 801 struct em28xx_usb_bufs *usb_bufs; 802 struct usb_device *udev = interface_to_usbdev(dev->intf); 803 int i; 804 805 em28xx_isocdbg("em28xx: called em28xx_uninit_usb_xfer in mode %d\n", 806 mode); 807 808 if (mode == EM28XX_DIGITAL_MODE) 809 usb_bufs = &dev->usb_ctl.digital_bufs; 810 else 811 usb_bufs = &dev->usb_ctl.analog_bufs; 812 813 for (i = 0; i < usb_bufs->num_bufs; i++) { 814 urb = usb_bufs->urb[i]; 815 if (urb) { 816 if (!irqs_disabled()) 817 usb_kill_urb(urb); 818 else 819 usb_unlink_urb(urb); 820 821 if (usb_bufs->transfer_buffer[i]) { 822 usb_free_coherent(udev, 823 urb->transfer_buffer_length, 824 usb_bufs->transfer_buffer[i], 825 urb->transfer_dma); 826 } 827 usb_free_urb(urb); 828 usb_bufs->urb[i] = NULL; 829 } 830 usb_bufs->transfer_buffer[i] = NULL; 831 } 832 833 kfree(usb_bufs->urb); 834 kfree(usb_bufs->transfer_buffer); 835 836 usb_bufs->urb = NULL; 837 usb_bufs->transfer_buffer = NULL; 838 usb_bufs->num_bufs = 0; 839 840 em28xx_capture_start(dev, 0); 841 } 842 EXPORT_SYMBOL_GPL(em28xx_uninit_usb_xfer); 843 844 /* 845 * Stop URBs 846 */ 847 void em28xx_stop_urbs(struct em28xx *dev) 848 { 849 int i; 850 struct urb *urb; 851 struct em28xx_usb_bufs *isoc_bufs = &dev->usb_ctl.digital_bufs; 852 853 em28xx_isocdbg("em28xx: called em28xx_stop_urbs\n"); 854 855 for (i = 0; i < isoc_bufs->num_bufs; i++) { 856 urb = isoc_bufs->urb[i]; 857 if (urb) { 858 if (!irqs_disabled()) 859 usb_kill_urb(urb); 860 else 861 usb_unlink_urb(urb); 862 } 863 } 864 865 em28xx_capture_start(dev, 0); 866 } 867 EXPORT_SYMBOL_GPL(em28xx_stop_urbs); 868 869 /* 870 * Allocate URBs 871 */ 872 int em28xx_alloc_urbs(struct em28xx *dev, enum em28xx_mode mode, int xfer_bulk, 873 int num_bufs, int max_pkt_size, int packet_multiplier) 874 { 875 struct em28xx_usb_bufs *usb_bufs; 876 struct urb *urb; 877 struct usb_device *udev = interface_to_usbdev(dev->intf); 878 int i; 879 int sb_size, pipe; 880 int j, k; 881 882 em28xx_isocdbg("em28xx: called em28xx_alloc_isoc in mode %d\n", mode); 883 884 /* Check mode and if we have an endpoint for the selected 885 transfer type, select buffer */ 886 if (mode == EM28XX_DIGITAL_MODE) { 887 if ((xfer_bulk && !dev->dvb_ep_bulk) || 888 (!xfer_bulk && !dev->dvb_ep_isoc)) { 889 dev_err(&dev->intf->dev, 890 "no endpoint for DVB mode and transfer type %d\n", 891 xfer_bulk > 0); 892 return -EINVAL; 893 } 894 usb_bufs = &dev->usb_ctl.digital_bufs; 895 } else if (mode == EM28XX_ANALOG_MODE) { 896 if ((xfer_bulk && !dev->analog_ep_bulk) || 897 (!xfer_bulk && !dev->analog_ep_isoc)) { 898 dev_err(&dev->intf->dev, 899 "no endpoint for analog mode and transfer type %d\n", 900 xfer_bulk > 0); 901 return -EINVAL; 902 } 903 usb_bufs = &dev->usb_ctl.analog_bufs; 904 } else { 905 dev_err(&dev->intf->dev, "invalid mode selected\n"); 906 return -EINVAL; 907 } 908 909 /* De-allocates all pending stuff */ 910 em28xx_uninit_usb_xfer(dev, mode); 911 912 usb_bufs->num_bufs = num_bufs; 913 914 usb_bufs->urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL); 915 if (!usb_bufs->urb) 916 return -ENOMEM; 917 918 usb_bufs->transfer_buffer = kzalloc(sizeof(void *)*num_bufs, 919 GFP_KERNEL); 920 if (!usb_bufs->transfer_buffer) { 921 kfree(usb_bufs->urb); 922 return -ENOMEM; 923 } 924 925 usb_bufs->max_pkt_size = max_pkt_size; 926 if (xfer_bulk) 927 usb_bufs->num_packets = 0; 928 else 929 usb_bufs->num_packets = packet_multiplier; 930 dev->usb_ctl.vid_buf = NULL; 931 dev->usb_ctl.vbi_buf = NULL; 932 933 sb_size = packet_multiplier * usb_bufs->max_pkt_size; 934 935 /* allocate urbs and transfer buffers */ 936 for (i = 0; i < usb_bufs->num_bufs; i++) { 937 urb = usb_alloc_urb(usb_bufs->num_packets, GFP_KERNEL); 938 if (!urb) { 939 em28xx_uninit_usb_xfer(dev, mode); 940 return -ENOMEM; 941 } 942 usb_bufs->urb[i] = urb; 943 944 usb_bufs->transfer_buffer[i] = usb_alloc_coherent(udev, 945 sb_size, GFP_KERNEL, &urb->transfer_dma); 946 if (!usb_bufs->transfer_buffer[i]) { 947 dev_err(&dev->intf->dev, 948 "unable to allocate %i bytes for transfer buffer %i%s\n", 949 sb_size, i, 950 in_interrupt() ? " while in int" : ""); 951 em28xx_uninit_usb_xfer(dev, mode); 952 return -ENOMEM; 953 } 954 memset(usb_bufs->transfer_buffer[i], 0, sb_size); 955 956 if (xfer_bulk) { /* bulk */ 957 pipe = usb_rcvbulkpipe(udev, 958 mode == EM28XX_ANALOG_MODE ? 959 dev->analog_ep_bulk : 960 dev->dvb_ep_bulk); 961 usb_fill_bulk_urb(urb, udev, pipe, 962 usb_bufs->transfer_buffer[i], sb_size, 963 em28xx_irq_callback, dev); 964 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; 965 } else { /* isoc */ 966 pipe = usb_rcvisocpipe(udev, 967 mode == EM28XX_ANALOG_MODE ? 968 dev->analog_ep_isoc : 969 dev->dvb_ep_isoc); 970 usb_fill_int_urb(urb, udev, pipe, 971 usb_bufs->transfer_buffer[i], sb_size, 972 em28xx_irq_callback, dev, 1); 973 urb->transfer_flags = URB_ISO_ASAP | 974 URB_NO_TRANSFER_DMA_MAP; 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 em28xx_init_usb_xfer in mode %d\n", 1008 mode); 1009 1010 dev->usb_ctl.urb_data_copy = urb_data_copy; 1011 1012 if (mode == EM28XX_DIGITAL_MODE) { 1013 usb_bufs = &dev->usb_ctl.digital_bufs; 1014 /* no need to free/alloc usb buffers in digital mode */ 1015 alloc = 0; 1016 } else { 1017 usb_bufs = &dev->usb_ctl.analog_bufs; 1018 alloc = 1; 1019 } 1020 1021 if (alloc) { 1022 rc = em28xx_alloc_urbs(dev, mode, xfer_bulk, num_bufs, 1023 max_pkt_size, packet_multiplier); 1024 if (rc) 1025 return rc; 1026 } 1027 1028 if (xfer_bulk) { 1029 rc = usb_clear_halt(udev, usb_bufs->urb[0]->pipe); 1030 if (rc < 0) { 1031 dev_err(&dev->intf->dev, 1032 "failed to clear USB bulk endpoint stall/halt condition (error=%i)\n", 1033 rc); 1034 em28xx_uninit_usb_xfer(dev, mode); 1035 return rc; 1036 } 1037 } 1038 1039 init_waitqueue_head(&dma_q->wq); 1040 init_waitqueue_head(&vbi_dma_q->wq); 1041 1042 em28xx_capture_start(dev, 1); 1043 1044 /* submit urbs and enables IRQ */ 1045 for (i = 0; i < usb_bufs->num_bufs; i++) { 1046 rc = usb_submit_urb(usb_bufs->urb[i], GFP_ATOMIC); 1047 if (rc) { 1048 dev_err(&dev->intf->dev, 1049 "submit of urb %i failed (error=%i)\n", i, rc); 1050 em28xx_uninit_usb_xfer(dev, mode); 1051 return rc; 1052 } 1053 } 1054 1055 return 0; 1056 } 1057 EXPORT_SYMBOL_GPL(em28xx_init_usb_xfer); 1058 1059 /* 1060 * Device control list 1061 */ 1062 1063 static LIST_HEAD(em28xx_devlist); 1064 static DEFINE_MUTEX(em28xx_devlist_mutex); 1065 1066 /* 1067 * Extension interface 1068 */ 1069 1070 static LIST_HEAD(em28xx_extension_devlist); 1071 1072 int em28xx_register_extension(struct em28xx_ops *ops) 1073 { 1074 struct em28xx *dev = NULL; 1075 1076 mutex_lock(&em28xx_devlist_mutex); 1077 list_add_tail(&ops->next, &em28xx_extension_devlist); 1078 list_for_each_entry(dev, &em28xx_devlist, devlist) { 1079 ops->init(dev); 1080 } 1081 mutex_unlock(&em28xx_devlist_mutex); 1082 pr_info("em28xx: Registered (%s) extension\n", ops->name); 1083 return 0; 1084 } 1085 EXPORT_SYMBOL(em28xx_register_extension); 1086 1087 void em28xx_unregister_extension(struct em28xx_ops *ops) 1088 { 1089 struct em28xx *dev = NULL; 1090 1091 mutex_lock(&em28xx_devlist_mutex); 1092 list_for_each_entry(dev, &em28xx_devlist, devlist) { 1093 ops->fini(dev); 1094 } 1095 list_del(&ops->next); 1096 mutex_unlock(&em28xx_devlist_mutex); 1097 pr_info("em28xx: Removed (%s) extension\n", ops->name); 1098 } 1099 EXPORT_SYMBOL(em28xx_unregister_extension); 1100 1101 void em28xx_init_extension(struct em28xx *dev) 1102 { 1103 const struct em28xx_ops *ops = NULL; 1104 1105 mutex_lock(&em28xx_devlist_mutex); 1106 list_add_tail(&dev->devlist, &em28xx_devlist); 1107 list_for_each_entry(ops, &em28xx_extension_devlist, next) { 1108 if (ops->init) 1109 ops->init(dev); 1110 } 1111 mutex_unlock(&em28xx_devlist_mutex); 1112 } 1113 1114 void em28xx_close_extension(struct em28xx *dev) 1115 { 1116 const struct em28xx_ops *ops = NULL; 1117 1118 mutex_lock(&em28xx_devlist_mutex); 1119 list_for_each_entry(ops, &em28xx_extension_devlist, next) { 1120 if (ops->fini) 1121 ops->fini(dev); 1122 } 1123 list_del(&dev->devlist); 1124 mutex_unlock(&em28xx_devlist_mutex); 1125 } 1126 1127 int em28xx_suspend_extension(struct em28xx *dev) 1128 { 1129 const struct em28xx_ops *ops = NULL; 1130 1131 dev_info(&dev->intf->dev, "Suspending extensions\n"); 1132 mutex_lock(&em28xx_devlist_mutex); 1133 list_for_each_entry(ops, &em28xx_extension_devlist, next) { 1134 if (ops->suspend) 1135 ops->suspend(dev); 1136 } 1137 mutex_unlock(&em28xx_devlist_mutex); 1138 return 0; 1139 } 1140 1141 int em28xx_resume_extension(struct em28xx *dev) 1142 { 1143 const struct em28xx_ops *ops = NULL; 1144 1145 dev_info(&dev->intf->dev, "Resuming extensions\n"); 1146 mutex_lock(&em28xx_devlist_mutex); 1147 list_for_each_entry(ops, &em28xx_extension_devlist, next) { 1148 if (ops->resume) 1149 ops->resume(dev); 1150 } 1151 mutex_unlock(&em28xx_devlist_mutex); 1152 return 0; 1153 } 1154