FILE
em28xx-core.c
File preview with syntax highlighting.
linux-6.19.14/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 <cavedon@sssup.it> 6// Markus Rechberger <mrechberger@gmail.com> 7// Mauro Carvalho Chehab <mchehab@kernel.org> 8// Sascha Sommer <saschasommer@freenet.de> 9// Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com> 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 <cavedon@sssup.it>, " \ 24 "Markus Rechberger <mrechberger@gmail.com>, " \ 25 "Mauro Carvalho Chehab <mchehab@kernel.org>, " \ 26 "Sascha Sommer <saschasommer@freenet.de>" 27 28MODULE_AUTHOR(DRIVER_AUTHOR); 29MODULE_DESCRIPTION(DRIVER_DESC); 30MODULE_LICENSE("GPL v2"); 31MODULE_VERSION(EM28XX_VERSION); 32 33/* #define ENABLE_DEBUG_ISOC_FRAMES */ 34 35static unsigned int core_debug; 36module_param(core_debug, int, 0644); 37MODULE_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 45static unsigned int reg_debug; 46module_param(reg_debug, int, 0644); 47MODULE_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 */ 66int 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 */ 112int 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 124int em28xx_read_reg(struct em28xx *dev, u16 reg) 125{ 126 return em28xx_read_reg_req(dev, USB_REQ_GET_STATUS, reg); 127} 128EXPORT_SYMBOL_GPL(em28xx_read_reg); 129 130/* 131 * em28xx_write_regs_req() 132 * sends data to the usb device, specifying bRequest 133 */ 134int 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 177int 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} 181EXPORT_SYMBOL_GPL(em28xx_write_regs); 182 183/* Write a single register */ 184int em28xx_write_reg(struct em28xx *dev, u16 reg, u8 val) 185{ 186 return em28xx_write_regs(dev, reg, &val, 1); 187} 188EXPORT_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 */ 195int 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} 209EXPORT_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 */ 215int 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} 228EXPORT_SYMBOL_GPL(em28xx_toggle_reg_bits); 229 230/* 231 * em28xx_is_ac97_ready() 232 * Checks if ac97 is ready 233 */ 234static 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 */ 259int 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} 280EXPORT_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 */ 286int 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} 308EXPORT_SYMBOL_GPL(em28xx_write_ac97); 309 310struct em28xx_vol_itable { 311 enum em28xx_amux mux; 312 u8 reg; 313}; 314 315static 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 325static 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 352static 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 401struct em28xx_vol_otable { 402 enum em28xx_aout mux; 403 u8 reg; 404}; 405 406static 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 414int em28xx_audio_analog_set(struct em28xx *dev) 415{ 416 int ret, i; 417 u8 xclk; 418 419 /* Set GPIOs here for boards without audio */ 420 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) 421 return em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio); 422 423 /* 424 * It is assumed that all devices use master volume for output. 425 * It would be possible to use also line output. 426 */ 427 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) { 428 /* Mute all outputs */ 429 for (i = 0; i < ARRAY_SIZE(outputs); i++) { 430 ret = em28xx_write_ac97(dev, outputs[i].reg, 0x8000); 431 if (ret < 0) 432 dev_warn(&dev->intf->dev, 433 "couldn't setup AC97 register %d\n", 434 outputs[i].reg); 435 } 436 } 437 438 xclk = dev->board.xclk & 0x7f; 439 if (!dev->mute) 440 xclk |= EM28XX_XCLK_AUDIO_UNMUTE; 441 442 ret = em28xx_write_reg(dev, EM28XX_R0F_XCLK, xclk); 443 if (ret < 0) 444 return ret; 445 usleep_range(10000, 11000); 446 447 /* Selects the proper audio input */ 448 ret = em28xx_set_audio_source(dev); 449 450 /* Sets volume */ 451 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) { 452 int vol; 453 454 em28xx_write_ac97(dev, AC97_POWERDOWN, 0x4200); 455 em28xx_write_ac97(dev, AC97_EXTENDED_STATUS, 0x0031); 456 em28xx_write_ac97(dev, AC97_PCM_LR_ADC_RATE, 0xbb80); 457 458 /* LSB: left channel - both channels with the same level */ 459 vol = (0x1f - dev->volume) | ((0x1f - dev->volume) << 8); 460 461 /* Mute device, if needed */ 462 if (dev->mute) 463 vol |= 0x8000; 464 465 /* Sets volume */ 466 for (i = 0; i < ARRAY_SIZE(outputs); i++) { 467 if (dev->ctl_aoutput & outputs[i].mux) 468 ret = em28xx_write_ac97(dev, outputs[i].reg, 469 vol); 470 if (ret < 0) 471 dev_warn(&dev->intf->dev, 472 "couldn't setup AC97 register %d\n", 473 outputs[i].reg); 474 } 475 476 if (dev->ctl_aoutput & EM28XX_AOUT_PCM_IN) { 477 int sel = ac97_return_record_select(dev->ctl_aoutput); 478 479 /* 480 * Use the same input for both left and right 481 * channels 482 */ 483 sel |= (sel << 8); 484 485 em28xx_write_ac97(dev, AC97_REC_SEL, sel); 486 } 487 } 488 489 return ret; 490} 491EXPORT_SYMBOL_GPL(em28xx_audio_analog_set); 492 493int em28xx_audio_setup(struct em28xx *dev) 494{ 495 int vid1, vid2, feat, cfg; 496 u32 vid = 0; 497 u8 i2s_samplerates; 498 499 if (dev->chip_id == CHIP_ID_EM2870 || 500 dev->chip_id == CHIP_ID_EM2874 || 501 dev->chip_id == CHIP_ID_EM28174 || 502 dev->chip_id == CHIP_ID_EM28178) { 503 /* Digital only device - don't load any alsa module */ 504 dev->int_audio_type = EM28XX_INT_AUDIO_NONE; 505 dev->usb_audio_type = EM28XX_USB_AUDIO_NONE; 506 return 0; 507 } 508 509 /* See how this device is configured */ 510 cfg = em28xx_read_reg(dev, EM28XX_R00_CHIPCFG); 511 dev_info(&dev->intf->dev, "Config register raw data: 0x%02x\n", cfg); 512 if (cfg < 0) { /* Register read error */ 513 /* Be conservative */ 514 dev->int_audio_type = EM28XX_INT_AUDIO_AC97; 515 } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) == 0x00) { 516 /* The device doesn't have vendor audio at all */ 517 dev->int_audio_type = EM28XX_INT_AUDIO_NONE; 518 dev->usb_audio_type = EM28XX_USB_AUDIO_NONE; 519 return 0; 520 } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) != EM28XX_CHIPCFG_AC97) { 521 dev->int_audio_type = EM28XX_INT_AUDIO_I2S; 522 if (dev->chip_id < CHIP_ID_EM2860 && 523 (cfg & EM28XX_CHIPCFG_AUDIOMASK) == 524 EM2820_CHIPCFG_I2S_1_SAMPRATE) 525 i2s_samplerates = 1; 526 else if (dev->chip_id >= CHIP_ID_EM2860 && 527 (cfg & EM28XX_CHIPCFG_AUDIOMASK) == 528 EM2860_CHIPCFG_I2S_5_SAMPRATES) 529 i2s_samplerates = 5; 530 else 531 i2s_samplerates = 3; 532 dev_info(&dev->intf->dev, "I2S Audio (%d sample rate(s))\n", 533 i2s_samplerates); 534 /* Skip the code that does AC97 vendor detection */ 535 dev->audio_mode.ac97 = EM28XX_NO_AC97; 536 goto init_audio; 537 } else { 538 dev->int_audio_type = EM28XX_INT_AUDIO_AC97; 539 } 540 541 dev->audio_mode.ac97 = EM28XX_AC97_OTHER; 542 543 vid1 = em28xx_read_ac97(dev, AC97_VENDOR_ID1); 544 if (vid1 < 0) { 545 /* 546 * Device likely doesn't support AC97 547 * Note: (some) em2800 devices without eeprom reports 0x91 on 548 * CHIPCFG register, even not having an AC97 chip 549 */ 550 dev_warn(&dev->intf->dev, 551 "AC97 chip type couldn't be determined\n"); 552 dev->audio_mode.ac97 = EM28XX_NO_AC97; 553 if (dev->usb_audio_type == EM28XX_USB_AUDIO_VENDOR) 554 dev->usb_audio_type = EM28XX_USB_AUDIO_NONE; 555 dev->int_audio_type = EM28XX_INT_AUDIO_NONE; 556 goto init_audio; 557 } 558 559 vid2 = em28xx_read_ac97(dev, AC97_VENDOR_ID2); 560 if (vid2 < 0) 561 goto init_audio; 562 563 vid = vid1 << 16 | vid2; 564 dev_warn(&dev->intf->dev, "AC97 vendor ID = 0x%08x\n", vid); 565 566 feat = em28xx_read_ac97(dev, AC97_RESET); 567 if (feat < 0) 568 goto init_audio; 569 570 dev_warn(&dev->intf->dev, "AC97 features = 0x%04x\n", feat); 571 572 /* Try to identify what audio processor we have */ 573 if ((vid == 0xffffffff || vid == 0x83847650) && feat == 0x6a90) 574 dev->audio_mode.ac97 = EM28XX_AC97_EM202; 575 else if ((vid >> 8) == 0x838476) 576 dev->audio_mode.ac97 = EM28XX_AC97_SIGMATEL; 577 578init_audio: 579 /* Reports detected AC97 processor */ 580 switch (dev->audio_mode.ac97) { 581 case EM28XX_NO_AC97: 582 dev_info(&dev->intf->dev, "No AC97 audio processor\n"); 583 break; 584 case EM28XX_AC97_EM202: 585 dev_info(&dev->intf->dev, 586 "Empia 202 AC97 audio processor detected\n"); 587 break; 588 case EM28XX_AC97_SIGMATEL: 589 dev_info(&dev->intf->dev, 590 "Sigmatel audio processor detected (stac 97%02x)\n", 591 vid & 0xff); 592 break; 593 case EM28XX_AC97_OTHER: 594 dev_warn(&dev->intf->dev, 595 "Unknown AC97 audio processor detected!\n"); 596 break; 597 default: 598 break; 599 } 600 601 return em28xx_audio_analog_set(dev); 602} 603EXPORT_SYMBOL_GPL(em28xx_audio_setup); 604 605const struct em28xx_led *em28xx_find_led(struct em28xx *dev, 606 enum em28xx_led_role role) 607{ 608 if (dev->board.leds) { 609 u8 k = 0; 610 611 while (dev->board.leds[k].role >= 0 && 612 dev->board.leds[k].role < EM28XX_NUM_LED_ROLES) { 613 if (dev->board.leds[k].role == role) 614 return &dev->board.leds[k]; 615 k++; 616 } 617 } 618 return NULL; 619} 620EXPORT_SYMBOL_GPL(em28xx_find_led); 621 622int em28xx_capture_start(struct em28xx *dev, int start) 623{ 624 int rc; 625 const struct em28xx_led *led = NULL; 626 627 if (dev->chip_id == CHIP_ID_EM2874 || 628 dev->chip_id == CHIP_ID_EM2884 || 629 dev->chip_id == CHIP_ID_EM28174 || 630 dev->chip_id == CHIP_ID_EM28178) { 631 /* The Transport Stream Enable Register moved in em2874 */ 632 if (dev->dvb_xfer_bulk) { 633 /* Max Tx Size = 188 * 256 = 48128 - LCM(188,512) * 2 */ 634 em28xx_write_reg(dev, (dev->ts == PRIMARY_TS) ? 635 EM2874_R5D_TS1_PKT_SIZE : 636 EM2874_R5E_TS2_PKT_SIZE, 637 0xff); 638 } else { 639 /* ISOC Maximum Transfer Size = 188 * 5 */ 640 em28xx_write_reg(dev, (dev->ts == PRIMARY_TS) ? 641 EM2874_R5D_TS1_PKT_SIZE : 642 EM2874_R5E_TS2_PKT_SIZE, 643 dev->dvb_max_pkt_size_isoc / 188); 644 } 645 if (dev->ts == PRIMARY_TS) 646 rc = em28xx_write_reg_bits(dev, 647 EM2874_R5F_TS_ENABLE, 648 start ? EM2874_TS1_CAPTURE_ENABLE : 0x00, 649 EM2874_TS1_CAPTURE_ENABLE | EM2874_TS1_FILTER_ENABLE | EM2874_TS1_NULL_DISCARD); 650 else 651 rc = em28xx_write_reg_bits(dev, 652 EM2874_R5F_TS_ENABLE, 653 start ? EM2874_TS2_CAPTURE_ENABLE : 0x00, 654 EM2874_TS2_CAPTURE_ENABLE | EM2874_TS2_FILTER_ENABLE | EM2874_TS2_NULL_DISCARD); 655 } else { 656 /* FIXME: which is the best order? */ 657 /* video registers are sampled by VREF */ 658 rc = em28xx_write_reg_bits(dev, EM28XX_R0C_USBSUSP, 659 start ? 0x10 : 0x00, 0x10); 660 if (rc < 0) 661 return rc; 662 663 if (start) { 664 if (dev->is_webcam) 665 rc = em28xx_write_reg(dev, 0x13, 0x0c); 666 667 /* Enable video capture */ 668 rc = em28xx_write_reg(dev, 0x48, 0x00); 669 if (rc < 0) 670 return rc; 671 672 if (dev->mode == EM28XX_ANALOG_MODE) 673 rc = em28xx_write_reg(dev, 674 EM28XX_R12_VINENABLE, 675 0x67); 676 else 677 rc = em28xx_write_reg(dev, 678 EM28XX_R12_VINENABLE, 679 0x37); 680 if (rc < 0) 681 return rc; 682 683 usleep_range(10000, 11000); 684 } else { 685 /* disable video capture */ 686 rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x27); 687 } 688 } 689 690 if (dev->mode == EM28XX_ANALOG_MODE) 691 led = em28xx_find_led(dev, EM28XX_LED_ANALOG_CAPTURING); 692 else if (dev->ts == PRIMARY_TS) 693 led = em28xx_find_led(dev, EM28XX_LED_DIGITAL_CAPTURING); 694 else 695 led = em28xx_find_led(dev, EM28XX_LED_DIGITAL_CAPTURING_TS2); 696 697 if (led) 698 em28xx_write_reg_bits(dev, led->gpio_reg, 699 (!start ^ led->inverted) ? 700 ~led->gpio_mask : led->gpio_mask, 701 led->gpio_mask); 702 703 return rc; 704} 705 706int em28xx_gpio_set(struct em28xx *dev, const struct em28xx_reg_seq *gpio) 707{ 708 int rc = 0; 709 710 if (!gpio) 711 return rc; 712 713 if (dev->mode != EM28XX_SUSPEND) { 714 em28xx_write_reg(dev, 0x48, 0x00); 715 if (dev->mode == EM28XX_ANALOG_MODE) 716 em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x67); 717 else 718 em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x37); 719 usleep_range(10000, 11000); 720 } 721 722 /* Send GPIO reset sequences specified at board entry */ 723 while (gpio->sleep >= 0) { 724 if (gpio->reg >= 0) { 725 rc = em28xx_write_reg_bits(dev, 726 gpio->reg, 727 gpio->val, 728 gpio->mask); 729 if (rc < 0) 730 return rc; 731 } 732 if (gpio->sleep > 0) 733 msleep(gpio->sleep); 734 735 gpio++; 736 } 737 return rc; 738} 739EXPORT_SYMBOL_GPL(em28xx_gpio_set); 740 741int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode) 742{ 743 if (dev->mode == set_mode) 744 return 0; 745 746 if (set_mode == EM28XX_SUSPEND) { 747 dev->mode = set_mode; 748 749 /* FIXME: add suspend support for ac97 */ 750 751 return em28xx_gpio_set(dev, dev->board.suspend_gpio); 752 } 753 754 dev->mode = set_mode; 755 756 if (dev->mode == EM28XX_DIGITAL_MODE) 757 return em28xx_gpio_set(dev, dev->board.dvb_gpio); 758 else 759 return em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio); 760} 761EXPORT_SYMBOL_GPL(em28xx_set_mode); 762 763/* 764 *URB control 765 */ 766 767/* 768 * URB completion handler for isoc/bulk transfers 769 */ 770static void em28xx_irq_callback(struct urb *urb) 771{ 772 struct em28xx *dev = urb->context; 773 unsigned long flags; 774 int i; 775 776 switch (urb->status) { 777 case 0: /* success */ 778 case -ETIMEDOUT: /* NAK */ 779 break; 780 case -ECONNRESET: /* kill */ 781 case -ENOENT: 782 case -ESHUTDOWN: 783 return; 784 default: /* error */ 785 em28xx_isocdbg("urb completion error %d.\n", urb->status); 786 break; 787 } 788 789 /* Copy data from URB */ 790 spin_lock_irqsave(&dev->slock, flags); 791 dev->usb_ctl.urb_data_copy(dev, urb); 792 spin_unlock_irqrestore(&dev->slock, flags); 793 794 /* Reset urb buffers */ 795 for (i = 0; i < urb->number_of_packets; i++) { 796 /* isoc only (bulk: number_of_packets = 0) */ 797 urb->iso_frame_desc[i].status = 0; 798 urb->iso_frame_desc[i].actual_length = 0; 799 } 800 urb->status = 0; 801 802 urb->status = usb_submit_urb(urb, GFP_ATOMIC); 803 if (urb->status) { 804 em28xx_isocdbg("urb resubmit failed (error=%i)\n", 805 urb->status); 806 } 807} 808 809/* 810 * Stop and Deallocate URBs 811 */ 812void em28xx_uninit_usb_xfer(struct em28xx *dev, enum em28xx_mode mode) 813{ 814 struct urb *urb; 815 struct em28xx_usb_bufs *usb_bufs; 816 int i; 817 818 em28xx_isocdbg("called %s in mode %d\n", __func__, mode); 819 820 if (mode == EM28XX_DIGITAL_MODE) 821 usb_bufs = &dev->usb_ctl.digital_bufs; 822 else 823 usb_bufs = &dev->usb_ctl.analog_bufs; 824 825 for (i = 0; i < usb_bufs->num_bufs; i++) { 826 urb = usb_bufs->urb[i]; 827 if (urb) { 828 if (!irqs_disabled()) 829 usb_kill_urb(urb); 830 else 831 usb_unlink_urb(urb); 832 833 usb_free_urb(urb); 834 usb_bufs->urb[i] = NULL; 835 } 836 } 837 838 kfree(usb_bufs->urb); 839 kfree(usb_bufs->buf); 840 841 usb_bufs->urb = NULL; 842 usb_bufs->buf = NULL; 843 usb_bufs->num_bufs = 0; 844 845 em28xx_capture_start(dev, 0); 846} 847EXPORT_SYMBOL_GPL(em28xx_uninit_usb_xfer); 848 849/* 850 * Stop URBs 851 */ 852void em28xx_stop_urbs(struct em28xx *dev) 853{ 854 int i; 855 struct urb *urb; 856 struct em28xx_usb_bufs *isoc_bufs = &dev->usb_ctl.digital_bufs; 857 858 em28xx_isocdbg("called %s\n", __func__); 859 860 for (i = 0; i < isoc_bufs->num_bufs; i++) { 861 urb = isoc_bufs->urb[i]; 862 if (urb) { 863 if (!irqs_disabled()) 864 usb_kill_urb(urb); 865 else 866 usb_unlink_urb(urb); 867 } 868 } 869 870 em28xx_capture_start(dev, 0); 871} 872EXPORT_SYMBOL_GPL(em28xx_stop_urbs); 873 874/* 875 * Allocate URBs 876 */ 877int em28xx_alloc_urbs(struct em28xx *dev, enum em28xx_mode mode, int xfer_bulk, 878 int num_bufs, int max_pkt_size, int packet_multiplier) 879{ 880 struct em28xx_usb_bufs *usb_bufs; 881 struct urb *urb; 882 struct usb_device *udev = interface_to_usbdev(dev->intf); 883 int i; 884 int sb_size, pipe; 885 int j, k; 886 887 em28xx_isocdbg("em28xx: called %s in mode %d\n", __func__, mode); 888 889 /* 890 * Check mode and if we have an endpoint for the selected 891 * transfer type, select buffer 892 */ 893 if (mode == EM28XX_DIGITAL_MODE) { 894 if ((xfer_bulk && !dev->dvb_ep_bulk) || 895 (!xfer_bulk && !dev->dvb_ep_isoc)) { 896 dev_err(&dev->intf->dev, 897 "no endpoint for DVB mode and transfer type %d\n", 898 xfer_bulk > 0); 899 return -EINVAL; 900 } 901 usb_bufs = &dev->usb_ctl.digital_bufs; 902 } else if (mode == EM28XX_ANALOG_MODE) { 903 if ((xfer_bulk && !dev->analog_ep_bulk) || 904 (!xfer_bulk && !dev->analog_ep_isoc)) { 905 dev_err(&dev->intf->dev, 906 "no endpoint for analog mode and transfer type %d\n", 907 xfer_bulk > 0); 908 return -EINVAL; 909 } 910 usb_bufs = &dev->usb_ctl.analog_bufs; 911 } else { 912 dev_err(&dev->intf->dev, "invalid mode selected\n"); 913 return -EINVAL; 914 } 915 916 /* De-allocates all pending stuff */ 917 em28xx_uninit_usb_xfer(dev, mode); 918 919 usb_bufs->num_bufs = num_bufs; 920 921 usb_bufs->urb = kcalloc(num_bufs, sizeof(void *), GFP_KERNEL); 922 if (!usb_bufs->urb) 923 return -ENOMEM; 924 925 usb_bufs->buf = kcalloc(num_bufs, sizeof(void *), GFP_KERNEL); 926 if (!usb_bufs->buf) { 927 kfree(usb_bufs->urb); 928 return -ENOMEM; 929 } 930 931 usb_bufs->max_pkt_size = max_pkt_size; 932 if (xfer_bulk) 933 usb_bufs->num_packets = 0; 934 else 935 usb_bufs->num_packets = packet_multiplier; 936 dev->usb_ctl.vid_buf = NULL; 937 dev->usb_ctl.vbi_buf = NULL; 938 939 sb_size = packet_multiplier * usb_bufs->max_pkt_size; 940 941 /* allocate urbs and transfer buffers */ 942 for (i = 0; i < usb_bufs->num_bufs; i++) { 943 urb = usb_alloc_urb(usb_bufs->num_packets, GFP_KERNEL); 944 if (!urb) { 945 em28xx_uninit_usb_xfer(dev, mode); 946 return -ENOMEM; 947 } 948 usb_bufs->urb[i] = urb; 949 950 usb_bufs->buf[i] = kzalloc(sb_size, GFP_KERNEL); 951 if (!usb_bufs->buf[i]) { 952 for (i--; i >= 0; i--) 953 kfree(usb_bufs->buf[i]); 954 955 em28xx_uninit_usb_xfer(dev, mode); 956 return -ENOMEM; 957 } 958 959 urb->transfer_flags = URB_FREE_BUFFER; 960 961 if (xfer_bulk) { /* bulk */ 962 pipe = usb_rcvbulkpipe(udev, 963 mode == EM28XX_ANALOG_MODE ? 964 dev->analog_ep_bulk : 965 dev->dvb_ep_bulk); 966 usb_fill_bulk_urb(urb, udev, pipe, usb_bufs->buf[i], 967 sb_size, em28xx_irq_callback, dev); 968 } else { /* isoc */ 969 pipe = usb_rcvisocpipe(udev, 970 mode == EM28XX_ANALOG_MODE ? 971 dev->analog_ep_isoc : 972 dev->dvb_ep_isoc); 973 usb_fill_int_urb(urb, udev, pipe, usb_bufs->buf[i], 974 sb_size, em28xx_irq_callback, dev, 1); 975 urb->transfer_flags |= URB_ISO_ASAP; 976 k = 0; 977 for (j = 0; j < usb_bufs->num_packets; j++) { 978 urb->iso_frame_desc[j].offset = k; 979 urb->iso_frame_desc[j].length = 980 usb_bufs->max_pkt_size; 981 k += usb_bufs->max_pkt_size; 982 } 983 } 984 985 urb->number_of_packets = usb_bufs->num_packets; 986 } 987 988 return 0; 989} 990EXPORT_SYMBOL_GPL(em28xx_alloc_urbs); 991 992/* 993 * Allocate URBs and start IRQ 994 */ 995int em28xx_init_usb_xfer(struct em28xx *dev, enum em28xx_mode mode, 996 int xfer_bulk, int num_bufs, int max_pkt_size, 997 int packet_multiplier, 998 int (*urb_data_copy)(struct em28xx *dev, struct urb *urb)) 999{ 1000 struct em28xx_dmaqueue *dma_q = &dev->vidq; 1001 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq; 1002 struct em28xx_usb_bufs *usb_bufs; 1003 struct usb_device *udev = interface_to_usbdev(dev->intf); 1004 int i; 1005 int rc; 1006 int alloc; 1007 1008 em28xx_isocdbg("em28xx: called %s in mode %d\n", __func__, 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_KERNEL); 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} 1057EXPORT_SYMBOL_GPL(em28xx_init_usb_xfer); 1058 1059/* 1060 * Device control list 1061 */ 1062 1063static LIST_HEAD(em28xx_devlist); 1064static DEFINE_MUTEX(em28xx_devlist_mutex); 1065 1066/* 1067 * Extension interface 1068 */ 1069 1070static LIST_HEAD(em28xx_extension_devlist); 1071 1072int 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 if (ops->init) { 1080 ops->init(dev); 1081 if (dev->dev_next) 1082 ops->init(dev->dev_next); 1083 } 1084 } 1085 mutex_unlock(&em28xx_devlist_mutex); 1086 pr_info("em28xx: Registered (%s) extension\n", ops->name); 1087 return 0; 1088} 1089EXPORT_SYMBOL(em28xx_register_extension); 1090 1091void em28xx_unregister_extension(struct em28xx_ops *ops) 1092{ 1093 struct em28xx *dev = NULL; 1094 1095 mutex_lock(&em28xx_devlist_mutex); 1096 list_for_each_entry(dev, &em28xx_devlist, devlist) { 1097 if (ops->fini) { 1098 if (dev->dev_next) 1099 ops->fini(dev->dev_next); 1100 ops->fini(dev); 1101 } 1102 } 1103 list_del(&ops->next); 1104 mutex_unlock(&em28xx_devlist_mutex); 1105 pr_info("em28xx: Removed (%s) extension\n", ops->name); 1106} 1107EXPORT_SYMBOL(em28xx_unregister_extension); 1108 1109void em28xx_init_extension(struct em28xx *dev) 1110{ 1111 const struct em28xx_ops *ops = NULL; 1112 1113 mutex_lock(&em28xx_devlist_mutex); 1114 list_add_tail(&dev->devlist, &em28xx_devlist); 1115 list_for_each_entry(ops, &em28xx_extension_devlist, next) { 1116 if (ops->init) { 1117 ops->init(dev); 1118 if (dev->dev_next) 1119 ops->init(dev->dev_next); 1120 } 1121 } 1122 mutex_unlock(&em28xx_devlist_mutex); 1123} 1124 1125void em28xx_close_extension(struct em28xx *dev) 1126{ 1127 const struct em28xx_ops *ops = NULL; 1128 1129 mutex_lock(&em28xx_devlist_mutex); 1130 list_for_each_entry(ops, &em28xx_extension_devlist, next) { 1131 if (ops->fini) { 1132 if (dev->dev_next) 1133 ops->fini(dev->dev_next); 1134 ops->fini(dev); 1135 } 1136 } 1137 list_del(&dev->devlist); 1138 mutex_unlock(&em28xx_devlist_mutex); 1139} 1140 1141int em28xx_suspend_extension(struct em28xx *dev) 1142{ 1143 const struct em28xx_ops *ops = NULL; 1144 1145 dev_info(&dev->intf->dev, "Suspending extensions\n"); 1146 mutex_lock(&em28xx_devlist_mutex); 1147 list_for_each_entry(ops, &em28xx_extension_devlist, next) { 1148 if (!ops->suspend) 1149 continue; 1150 ops->suspend(dev); 1151 if (dev->dev_next) 1152 ops->suspend(dev->dev_next); 1153 } 1154 mutex_unlock(&em28xx_devlist_mutex); 1155 return 0; 1156} 1157 1158int em28xx_resume_extension(struct em28xx *dev) 1159{ 1160 const struct em28xx_ops *ops = NULL; 1161 1162 dev_info(&dev->intf->dev, "Resuming extensions\n"); 1163 mutex_lock(&em28xx_devlist_mutex); 1164 list_for_each_entry(ops, &em28xx_extension_devlist, next) { 1165 if (!ops->resume) 1166 continue; 1167 ops->resume(dev); 1168 if (dev->dev_next) 1169 ops->resume(dev->dev_next); 1170 } 1171 mutex_unlock(&em28xx_devlist_mutex); 1172 return 0; 1173}
~/
Read-only file preview.