1 // SPDX-License-Identifier: GPL-2.0+
3 // em28xx-core.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
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>
11 // This program is free software; you can redistribute it and/or modify
12 // it under the terms of the GNU General Public License as published by
13 // the Free Software Foundation; either version 2 of the License, or
14 // (at your option) any later version.
16 // This program is distributed in the hope that it will be useful,
17 // but WITHOUT ANY WARRANTY; without even the implied warranty of
18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 // GNU General Public License for more details.
23 #include <linux/init.h>
24 #include <linux/jiffies.h>
25 #include <linux/list.h>
26 #include <linux/module.h>
27 #include <linux/slab.h>
28 #include <linux/usb.h>
29 #include <linux/vmalloc.h>
30 #include <sound/ac97_codec.h>
31 #include <media/v4l2-common.h>
33 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
34 "Markus Rechberger <mrechberger@gmail.com>, " \
35 "Mauro Carvalho Chehab <mchehab@kernel.org>, " \
36 "Sascha Sommer <saschasommer@freenet.de>"
38 MODULE_AUTHOR(DRIVER_AUTHOR);
39 MODULE_DESCRIPTION(DRIVER_DESC);
40 MODULE_LICENSE("GPL v2");
41 MODULE_VERSION(EM28XX_VERSION);
43 /* #define ENABLE_DEBUG_ISOC_FRAMES */
45 static unsigned int core_debug;
46 module_param(core_debug, int, 0644);
47 MODULE_PARM_DESC(core_debug, "enable debug messages [core and isoc]");
49 #define em28xx_coredbg(fmt, arg...) do { \
51 dev_printk(KERN_DEBUG, &dev->intf->dev, \
52 "core: %s: " fmt, __func__, ## arg); \
55 static unsigned int reg_debug;
56 module_param(reg_debug, int, 0644);
57 MODULE_PARM_DESC(reg_debug, "enable debug messages [URB reg]");
59 #define em28xx_regdbg(fmt, arg...) do { \
61 dev_printk(KERN_DEBUG, &dev->intf->dev, \
62 "reg: %s: " fmt, __func__, ## arg); \
65 /* FIXME: don't abuse core_debug */
66 #define em28xx_isocdbg(fmt, arg...) do { \
68 dev_printk(KERN_DEBUG, &dev->intf->dev, \
69 "core: %s: " fmt, __func__, ## arg); \
73 * em28xx_read_reg_req()
74 * reads data from the usb device specifying bRequest
76 int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
80 struct usb_device *udev = interface_to_usbdev(dev->intf);
81 int pipe = usb_rcvctrlpipe(udev, 0);
83 if (dev->disconnected)
86 if (len > URB_MAX_CTRL_SIZE)
89 mutex_lock(&dev->ctrl_urb_lock);
90 ret = usb_control_msg(udev, pipe, req,
91 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
92 0x0000, reg, dev->urb_buf, len, HZ);
94 em28xx_regdbg("(pipe 0x%08x): IN: %02x %02x %02x %02x %02x %02x %02x %02x failed with error %i\n",
96 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
99 len & 0xff, len >> 8, ret);
100 mutex_unlock(&dev->ctrl_urb_lock);
101 return usb_translate_errors(ret);
105 memcpy(buf, dev->urb_buf, len);
107 mutex_unlock(&dev->ctrl_urb_lock);
109 em28xx_regdbg("(pipe 0x%08x): IN: %02x %02x %02x %02x %02x %02x %02x %02x <<< %*ph\n",
110 pipe, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
112 reg & 0xff, reg >> 8,
113 len & 0xff, len >> 8, len, buf);
119 * em28xx_read_reg_req()
120 * reads data from the usb device specifying bRequest
122 int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg)
127 ret = em28xx_read_reg_req_len(dev, req, reg, &val, 1);
134 int em28xx_read_reg(struct em28xx *dev, u16 reg)
136 return em28xx_read_reg_req(dev, USB_REQ_GET_STATUS, reg);
138 EXPORT_SYMBOL_GPL(em28xx_read_reg);
141 * em28xx_write_regs_req()
142 * sends data to the usb device, specifying bRequest
144 int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
148 struct usb_device *udev = interface_to_usbdev(dev->intf);
149 int pipe = usb_sndctrlpipe(udev, 0);
151 if (dev->disconnected)
154 if (len < 1 || len > URB_MAX_CTRL_SIZE)
157 mutex_lock(&dev->ctrl_urb_lock);
158 memcpy(dev->urb_buf, buf, len);
159 ret = usb_control_msg(udev, pipe, req,
160 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
161 0x0000, reg, dev->urb_buf, len, HZ);
162 mutex_unlock(&dev->ctrl_urb_lock);
165 em28xx_regdbg("(pipe 0x%08x): OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>> %*ph failed with error %i\n",
167 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
169 reg & 0xff, reg >> 8,
170 len & 0xff, len >> 8, len, buf, ret);
171 return usb_translate_errors(ret);
174 em28xx_regdbg("(pipe 0x%08x): OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>> %*ph\n",
176 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
178 reg & 0xff, reg >> 8,
179 len & 0xff, len >> 8, len, buf);
181 if (dev->wait_after_write)
182 msleep(dev->wait_after_write);
187 int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len)
189 return em28xx_write_regs_req(dev, USB_REQ_GET_STATUS, reg, buf, len);
191 EXPORT_SYMBOL_GPL(em28xx_write_regs);
193 /* Write a single register */
194 int em28xx_write_reg(struct em28xx *dev, u16 reg, u8 val)
196 return em28xx_write_regs(dev, reg, &val, 1);
198 EXPORT_SYMBOL_GPL(em28xx_write_reg);
201 * em28xx_write_reg_bits()
202 * sets only some bits (specified by bitmask) of a register, by first reading
205 int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val,
211 oldval = em28xx_read_reg(dev, reg);
215 newval = (((u8)oldval) & ~bitmask) | (val & bitmask);
217 return em28xx_write_regs(dev, reg, &newval, 1);
219 EXPORT_SYMBOL_GPL(em28xx_write_reg_bits);
222 * em28xx_toggle_reg_bits()
223 * toggles/inverts the bits (specified by bitmask) of a register
225 int em28xx_toggle_reg_bits(struct em28xx *dev, u16 reg, u8 bitmask)
230 oldval = em28xx_read_reg(dev, reg);
234 newval = (~oldval & bitmask) | (oldval & ~bitmask);
236 return em28xx_write_reg(dev, reg, newval);
238 EXPORT_SYMBOL_GPL(em28xx_toggle_reg_bits);
241 * em28xx_is_ac97_ready()
242 * Checks if ac97 is ready
244 static int em28xx_is_ac97_ready(struct em28xx *dev)
246 unsigned long timeout = jiffies + msecs_to_jiffies(EM28XX_AC97_XFER_TIMEOUT);
249 /* Wait up to 50 ms for AC97 command to complete */
250 while (time_is_after_jiffies(timeout)) {
251 ret = em28xx_read_reg(dev, EM28XX_R43_AC97BUSY);
260 dev_warn(&dev->intf->dev,
261 "AC97 command still being executed: not handled properly!\n");
267 * write a 16 bit value to the specified AC97 address (LSB first!)
269 int em28xx_read_ac97(struct em28xx *dev, u8 reg)
272 u8 addr = (reg & 0x7f) | 0x80;
275 ret = em28xx_is_ac97_ready(dev);
279 ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1);
283 ret = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R40_AC97LSB,
284 (u8 *)&val, sizeof(val));
288 return le16_to_cpu(val);
290 EXPORT_SYMBOL_GPL(em28xx_read_ac97);
293 * em28xx_write_ac97()
294 * write a 16 bit value to the specified AC97 address (LSB first!)
296 int em28xx_write_ac97(struct em28xx *dev, u8 reg, u16 val)
299 u8 addr = reg & 0x7f;
302 value = cpu_to_le16(val);
304 ret = em28xx_is_ac97_ready(dev);
308 ret = em28xx_write_regs(dev, EM28XX_R40_AC97LSB, (u8 *)&value, 2);
312 ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1);
318 EXPORT_SYMBOL_GPL(em28xx_write_ac97);
320 struct em28xx_vol_itable {
321 enum em28xx_amux mux;
325 static struct em28xx_vol_itable inputs[] = {
326 { EM28XX_AMUX_VIDEO, AC97_VIDEO },
327 { EM28XX_AMUX_LINE_IN, AC97_LINE },
328 { EM28XX_AMUX_PHONE, AC97_PHONE },
329 { EM28XX_AMUX_MIC, AC97_MIC },
330 { EM28XX_AMUX_CD, AC97_CD },
331 { EM28XX_AMUX_AUX, AC97_AUX },
332 { EM28XX_AMUX_PCM_OUT, AC97_PCM },
335 static int set_ac97_input(struct em28xx *dev)
338 enum em28xx_amux amux = dev->ctl_ainput;
341 * EM28XX_AMUX_VIDEO2 is a special case used to indicate that
342 * em28xx should point to LINE IN, while AC97 should use VIDEO
344 if (amux == EM28XX_AMUX_VIDEO2)
345 amux = EM28XX_AMUX_VIDEO;
347 /* Mute all entres but the one that were selected */
348 for (i = 0; i < ARRAY_SIZE(inputs); i++) {
349 if (amux == inputs[i].mux)
350 ret = em28xx_write_ac97(dev, inputs[i].reg, 0x0808);
352 ret = em28xx_write_ac97(dev, inputs[i].reg, 0x8000);
355 dev_warn(&dev->intf->dev,
356 "couldn't setup AC97 register %d\n",
362 static int em28xx_set_audio_source(struct em28xx *dev)
367 if (dev->board.is_em2800) {
368 if (dev->ctl_ainput == EM28XX_AMUX_VIDEO)
369 input = EM2800_AUDIO_SRC_TUNER;
371 input = EM2800_AUDIO_SRC_LINE;
373 ret = em28xx_write_regs(dev, EM2800_R08_AUDIOSRC, &input, 1);
378 if (dev->has_msp34xx) {
379 input = EM28XX_AUDIO_SRC_TUNER;
381 switch (dev->ctl_ainput) {
382 case EM28XX_AMUX_VIDEO:
383 input = EM28XX_AUDIO_SRC_TUNER;
386 input = EM28XX_AUDIO_SRC_LINE;
391 if (dev->board.mute_gpio && dev->mute)
392 em28xx_gpio_set(dev, dev->board.mute_gpio);
394 em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio);
396 ret = em28xx_write_reg_bits(dev, EM28XX_R0E_AUDIOSRC, input, 0xc0);
399 usleep_range(10000, 11000);
401 switch (dev->audio_mode.ac97) {
405 ret = set_ac97_input(dev);
411 struct em28xx_vol_otable {
412 enum em28xx_aout mux;
416 static const struct em28xx_vol_otable outputs[] = {
417 { EM28XX_AOUT_MASTER, AC97_MASTER },
418 { EM28XX_AOUT_LINE, AC97_HEADPHONE },
419 { EM28XX_AOUT_MONO, AC97_MASTER_MONO },
420 { EM28XX_AOUT_LFE, AC97_CENTER_LFE_MASTER },
421 { EM28XX_AOUT_SURR, AC97_SURROUND_MASTER },
424 int em28xx_audio_analog_set(struct em28xx *dev)
429 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE)
433 * It is assumed that all devices use master volume for output.
434 * It would be possible to use also line output.
436 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
437 /* Mute all outputs */
438 for (i = 0; i < ARRAY_SIZE(outputs); i++) {
439 ret = em28xx_write_ac97(dev, outputs[i].reg, 0x8000);
441 dev_warn(&dev->intf->dev,
442 "couldn't setup AC97 register %d\n",
447 xclk = dev->board.xclk & 0x7f;
449 xclk |= EM28XX_XCLK_AUDIO_UNMUTE;
451 ret = em28xx_write_reg(dev, EM28XX_R0F_XCLK, xclk);
454 usleep_range(10000, 11000);
456 /* Selects the proper audio input */
457 ret = em28xx_set_audio_source(dev);
460 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
463 em28xx_write_ac97(dev, AC97_POWERDOWN, 0x4200);
464 em28xx_write_ac97(dev, AC97_EXTENDED_STATUS, 0x0031);
465 em28xx_write_ac97(dev, AC97_PCM_LR_ADC_RATE, 0xbb80);
467 /* LSB: left channel - both channels with the same level */
468 vol = (0x1f - dev->volume) | ((0x1f - dev->volume) << 8);
470 /* Mute device, if needed */
475 for (i = 0; i < ARRAY_SIZE(outputs); i++) {
476 if (dev->ctl_aoutput & outputs[i].mux)
477 ret = em28xx_write_ac97(dev, outputs[i].reg,
480 dev_warn(&dev->intf->dev,
481 "couldn't setup AC97 register %d\n",
485 if (dev->ctl_aoutput & EM28XX_AOUT_PCM_IN) {
486 int sel = ac97_return_record_select(dev->ctl_aoutput);
489 * Use the same input for both left and right
494 em28xx_write_ac97(dev, AC97_REC_SEL, sel);
500 EXPORT_SYMBOL_GPL(em28xx_audio_analog_set);
502 int em28xx_audio_setup(struct em28xx *dev)
504 int vid1, vid2, feat, cfg;
508 if (dev->chip_id == CHIP_ID_EM2870 ||
509 dev->chip_id == CHIP_ID_EM2874 ||
510 dev->chip_id == CHIP_ID_EM28174 ||
511 dev->chip_id == CHIP_ID_EM28178) {
512 /* Digital only device - don't load any alsa module */
513 dev->int_audio_type = EM28XX_INT_AUDIO_NONE;
514 dev->usb_audio_type = EM28XX_USB_AUDIO_NONE;
518 /* See how this device is configured */
519 cfg = em28xx_read_reg(dev, EM28XX_R00_CHIPCFG);
520 dev_info(&dev->intf->dev, "Config register raw data: 0x%02x\n", cfg);
521 if (cfg < 0) { /* Register read error */
522 /* Be conservative */
523 dev->int_audio_type = EM28XX_INT_AUDIO_AC97;
524 } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) == 0x00) {
525 /* The device doesn't have vendor audio at all */
526 dev->int_audio_type = EM28XX_INT_AUDIO_NONE;
527 dev->usb_audio_type = EM28XX_USB_AUDIO_NONE;
529 } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) != EM28XX_CHIPCFG_AC97) {
530 dev->int_audio_type = EM28XX_INT_AUDIO_I2S;
531 if (dev->chip_id < CHIP_ID_EM2860 &&
532 (cfg & EM28XX_CHIPCFG_AUDIOMASK) ==
533 EM2820_CHIPCFG_I2S_1_SAMPRATE)
535 else if (dev->chip_id >= CHIP_ID_EM2860 &&
536 (cfg & EM28XX_CHIPCFG_AUDIOMASK) ==
537 EM2860_CHIPCFG_I2S_5_SAMPRATES)
541 dev_info(&dev->intf->dev, "I2S Audio (%d sample rate(s))\n",
543 /* Skip the code that does AC97 vendor detection */
544 dev->audio_mode.ac97 = EM28XX_NO_AC97;
547 dev->int_audio_type = EM28XX_INT_AUDIO_AC97;
550 dev->audio_mode.ac97 = EM28XX_AC97_OTHER;
552 vid1 = em28xx_read_ac97(dev, AC97_VENDOR_ID1);
555 * Device likely doesn't support AC97
556 * Note: (some) em2800 devices without eeprom reports 0x91 on
557 * CHIPCFG register, even not having an AC97 chip
559 dev_warn(&dev->intf->dev,
560 "AC97 chip type couldn't be determined\n");
561 dev->audio_mode.ac97 = EM28XX_NO_AC97;
562 if (dev->usb_audio_type == EM28XX_USB_AUDIO_VENDOR)
563 dev->usb_audio_type = EM28XX_USB_AUDIO_NONE;
564 dev->int_audio_type = EM28XX_INT_AUDIO_NONE;
568 vid2 = em28xx_read_ac97(dev, AC97_VENDOR_ID2);
572 vid = vid1 << 16 | vid2;
573 dev_warn(&dev->intf->dev, "AC97 vendor ID = 0x%08x\n", vid);
575 feat = em28xx_read_ac97(dev, AC97_RESET);
579 dev_warn(&dev->intf->dev, "AC97 features = 0x%04x\n", feat);
581 /* Try to identify what audio processor we have */
582 if ((vid == 0xffffffff || vid == 0x83847650) && feat == 0x6a90)
583 dev->audio_mode.ac97 = EM28XX_AC97_EM202;
584 else if ((vid >> 8) == 0x838476)
585 dev->audio_mode.ac97 = EM28XX_AC97_SIGMATEL;
588 /* Reports detected AC97 processor */
589 switch (dev->audio_mode.ac97) {
591 dev_info(&dev->intf->dev, "No AC97 audio processor\n");
593 case EM28XX_AC97_EM202:
594 dev_info(&dev->intf->dev,
595 "Empia 202 AC97 audio processor detected\n");
597 case EM28XX_AC97_SIGMATEL:
598 dev_info(&dev->intf->dev,
599 "Sigmatel audio processor detected (stac 97%02x)\n",
602 case EM28XX_AC97_OTHER:
603 dev_warn(&dev->intf->dev,
604 "Unknown AC97 audio processor detected!\n");
610 return em28xx_audio_analog_set(dev);
612 EXPORT_SYMBOL_GPL(em28xx_audio_setup);
614 const struct em28xx_led *em28xx_find_led(struct em28xx *dev,
615 enum em28xx_led_role role)
617 if (dev->board.leds) {
620 while (dev->board.leds[k].role >= 0 &&
621 dev->board.leds[k].role < EM28XX_NUM_LED_ROLES) {
622 if (dev->board.leds[k].role == role)
623 return &dev->board.leds[k];
629 EXPORT_SYMBOL_GPL(em28xx_find_led);
631 int em28xx_capture_start(struct em28xx *dev, int start)
634 const struct em28xx_led *led = NULL;
636 if (dev->chip_id == CHIP_ID_EM2874 ||
637 dev->chip_id == CHIP_ID_EM2884 ||
638 dev->chip_id == CHIP_ID_EM28174 ||
639 dev->chip_id == CHIP_ID_EM28178) {
640 /* The Transport Stream Enable Register moved in em2874 */
641 if (dev->dvb_xfer_bulk) {
642 /* Max Tx Size = 188 * 256 = 48128 - LCM(188,512) * 2 */
643 em28xx_write_reg(dev, (dev->ts == PRIMARY_TS) ?
644 EM2874_R5D_TS1_PKT_SIZE :
645 EM2874_R5E_TS2_PKT_SIZE,
648 /* ISOC Maximum Transfer Size = 188 * 5 */
649 em28xx_write_reg(dev, (dev->ts == PRIMARY_TS) ?
650 EM2874_R5D_TS1_PKT_SIZE :
651 EM2874_R5E_TS2_PKT_SIZE,
652 dev->dvb_max_pkt_size_isoc / 188);
654 if (dev->ts == PRIMARY_TS)
655 rc = em28xx_write_reg_bits(dev,
656 EM2874_R5F_TS_ENABLE,
657 start ? EM2874_TS1_CAPTURE_ENABLE : 0x00,
658 EM2874_TS1_CAPTURE_ENABLE | EM2874_TS1_FILTER_ENABLE | EM2874_TS1_NULL_DISCARD);
660 rc = em28xx_write_reg_bits(dev,
661 EM2874_R5F_TS_ENABLE,
662 start ? EM2874_TS2_CAPTURE_ENABLE : 0x00,
663 EM2874_TS2_CAPTURE_ENABLE | EM2874_TS2_FILTER_ENABLE | EM2874_TS2_NULL_DISCARD);
665 /* FIXME: which is the best order? */
666 /* video registers are sampled by VREF */
667 rc = em28xx_write_reg_bits(dev, EM28XX_R0C_USBSUSP,
668 start ? 0x10 : 0x00, 0x10);
674 rc = em28xx_write_reg(dev, 0x13, 0x0c);
676 /* Enable video capture */
677 rc = em28xx_write_reg(dev, 0x48, 0x00);
681 if (dev->mode == EM28XX_ANALOG_MODE)
682 rc = em28xx_write_reg(dev,
683 EM28XX_R12_VINENABLE,
686 rc = em28xx_write_reg(dev,
687 EM28XX_R12_VINENABLE,
692 usleep_range(10000, 11000);
694 /* disable video capture */
695 rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x27);
699 if (dev->mode == EM28XX_ANALOG_MODE)
700 led = em28xx_find_led(dev, EM28XX_LED_ANALOG_CAPTURING);
702 led = em28xx_find_led(dev, EM28XX_LED_DIGITAL_CAPTURING);
705 em28xx_write_reg_bits(dev, led->gpio_reg,
706 (!start ^ led->inverted) ?
707 ~led->gpio_mask : led->gpio_mask,
713 int em28xx_gpio_set(struct em28xx *dev, const struct em28xx_reg_seq *gpio)
720 if (dev->mode != EM28XX_SUSPEND) {
721 em28xx_write_reg(dev, 0x48, 0x00);
722 if (dev->mode == EM28XX_ANALOG_MODE)
723 em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x67);
725 em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x37);
726 usleep_range(10000, 11000);
729 /* Send GPIO reset sequences specified at board entry */
730 while (gpio->sleep >= 0) {
731 if (gpio->reg >= 0) {
732 rc = em28xx_write_reg_bits(dev,
746 EXPORT_SYMBOL_GPL(em28xx_gpio_set);
748 int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode)
750 if (dev->mode == set_mode)
753 if (set_mode == EM28XX_SUSPEND) {
754 dev->mode = set_mode;
756 /* FIXME: add suspend support for ac97 */
758 return em28xx_gpio_set(dev, dev->board.suspend_gpio);
761 dev->mode = set_mode;
763 if (dev->mode == EM28XX_DIGITAL_MODE)
764 return em28xx_gpio_set(dev, dev->board.dvb_gpio);
766 return em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio);
768 EXPORT_SYMBOL_GPL(em28xx_set_mode);
775 * URB completion handler for isoc/bulk transfers
777 static void em28xx_irq_callback(struct urb *urb)
779 struct em28xx *dev = urb->context;
782 switch (urb->status) {
783 case 0: /* success */
784 case -ETIMEDOUT: /* NAK */
786 case -ECONNRESET: /* kill */
791 em28xx_isocdbg("urb completion error %d.\n", urb->status);
795 /* Copy data from URB */
796 spin_lock(&dev->slock);
797 dev->usb_ctl.urb_data_copy(dev, urb);
798 spin_unlock(&dev->slock);
800 /* Reset urb buffers */
801 for (i = 0; i < urb->number_of_packets; i++) {
802 /* isoc only (bulk: number_of_packets = 0) */
803 urb->iso_frame_desc[i].status = 0;
804 urb->iso_frame_desc[i].actual_length = 0;
808 urb->status = usb_submit_urb(urb, GFP_ATOMIC);
810 em28xx_isocdbg("urb resubmit failed (error=%i)\n",
816 * Stop and Deallocate URBs
818 void em28xx_uninit_usb_xfer(struct em28xx *dev, enum em28xx_mode mode)
821 struct em28xx_usb_bufs *usb_bufs;
824 em28xx_isocdbg("called %s in mode %d\n", __func__, mode);
826 if (mode == EM28XX_DIGITAL_MODE)
827 usb_bufs = &dev->usb_ctl.digital_bufs;
829 usb_bufs = &dev->usb_ctl.analog_bufs;
831 for (i = 0; i < usb_bufs->num_bufs; i++) {
832 urb = usb_bufs->urb[i];
834 if (!irqs_disabled())
840 usb_bufs->urb[i] = NULL;
844 kfree(usb_bufs->urb);
845 kfree(usb_bufs->buf);
847 usb_bufs->urb = NULL;
848 usb_bufs->buf = NULL;
849 usb_bufs->num_bufs = 0;
851 em28xx_capture_start(dev, 0);
853 EXPORT_SYMBOL_GPL(em28xx_uninit_usb_xfer);
858 void em28xx_stop_urbs(struct em28xx *dev)
862 struct em28xx_usb_bufs *isoc_bufs = &dev->usb_ctl.digital_bufs;
864 em28xx_isocdbg("called %s\n", __func__);
866 for (i = 0; i < isoc_bufs->num_bufs; i++) {
867 urb = isoc_bufs->urb[i];
869 if (!irqs_disabled())
876 em28xx_capture_start(dev, 0);
878 EXPORT_SYMBOL_GPL(em28xx_stop_urbs);
883 int em28xx_alloc_urbs(struct em28xx *dev, enum em28xx_mode mode, int xfer_bulk,
884 int num_bufs, int max_pkt_size, int packet_multiplier)
886 struct em28xx_usb_bufs *usb_bufs;
888 struct usb_device *udev = interface_to_usbdev(dev->intf);
893 em28xx_isocdbg("em28xx: called %s in mode %d\n", __func__, mode);
896 * Check mode and if we have an endpoint for the selected
897 * transfer type, select buffer
899 if (mode == EM28XX_DIGITAL_MODE) {
900 if ((xfer_bulk && !dev->dvb_ep_bulk) ||
901 (!xfer_bulk && !dev->dvb_ep_isoc)) {
902 dev_err(&dev->intf->dev,
903 "no endpoint for DVB mode and transfer type %d\n",
907 usb_bufs = &dev->usb_ctl.digital_bufs;
908 } else if (mode == EM28XX_ANALOG_MODE) {
909 if ((xfer_bulk && !dev->analog_ep_bulk) ||
910 (!xfer_bulk && !dev->analog_ep_isoc)) {
911 dev_err(&dev->intf->dev,
912 "no endpoint for analog mode and transfer type %d\n",
916 usb_bufs = &dev->usb_ctl.analog_bufs;
918 dev_err(&dev->intf->dev, "invalid mode selected\n");
922 /* De-allocates all pending stuff */
923 em28xx_uninit_usb_xfer(dev, mode);
925 usb_bufs->num_bufs = num_bufs;
927 usb_bufs->urb = kcalloc(num_bufs, sizeof(void *), GFP_KERNEL);
931 usb_bufs->buf = kcalloc(num_bufs, sizeof(void *), GFP_KERNEL);
932 if (!usb_bufs->buf) {
933 kfree(usb_bufs->urb);
937 usb_bufs->max_pkt_size = max_pkt_size;
939 usb_bufs->num_packets = 0;
941 usb_bufs->num_packets = packet_multiplier;
942 dev->usb_ctl.vid_buf = NULL;
943 dev->usb_ctl.vbi_buf = NULL;
945 sb_size = packet_multiplier * usb_bufs->max_pkt_size;
947 /* allocate urbs and transfer buffers */
948 for (i = 0; i < usb_bufs->num_bufs; i++) {
949 urb = usb_alloc_urb(usb_bufs->num_packets, GFP_KERNEL);
951 em28xx_uninit_usb_xfer(dev, mode);
954 usb_bufs->urb[i] = urb;
956 usb_bufs->buf[i] = kzalloc(sb_size, GFP_KERNEL);
957 if (!usb_bufs->buf[i]) {
958 for (i--; i >= 0; i--)
959 kfree(usb_bufs->buf[i]);
961 em28xx_uninit_usb_xfer(dev, mode);
965 urb->transfer_flags = URB_FREE_BUFFER;
967 if (xfer_bulk) { /* bulk */
968 pipe = usb_rcvbulkpipe(udev,
969 mode == EM28XX_ANALOG_MODE ?
970 dev->analog_ep_bulk :
972 usb_fill_bulk_urb(urb, udev, pipe, usb_bufs->buf[i],
973 sb_size, em28xx_irq_callback, dev);
975 pipe = usb_rcvisocpipe(udev,
976 mode == EM28XX_ANALOG_MODE ?
977 dev->analog_ep_isoc :
979 usb_fill_int_urb(urb, udev, pipe, usb_bufs->buf[i],
980 sb_size, em28xx_irq_callback, dev, 1);
981 urb->transfer_flags |= URB_ISO_ASAP;
983 for (j = 0; j < usb_bufs->num_packets; j++) {
984 urb->iso_frame_desc[j].offset = k;
985 urb->iso_frame_desc[j].length =
986 usb_bufs->max_pkt_size;
987 k += usb_bufs->max_pkt_size;
991 urb->number_of_packets = usb_bufs->num_packets;
996 EXPORT_SYMBOL_GPL(em28xx_alloc_urbs);
999 * Allocate URBs and start IRQ
1001 int em28xx_init_usb_xfer(struct em28xx *dev, enum em28xx_mode mode,
1002 int xfer_bulk, int num_bufs, int max_pkt_size,
1003 int packet_multiplier,
1004 int (*urb_data_copy)(struct em28xx *dev, struct urb *urb))
1006 struct em28xx_dmaqueue *dma_q = &dev->vidq;
1007 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
1008 struct em28xx_usb_bufs *usb_bufs;
1009 struct usb_device *udev = interface_to_usbdev(dev->intf);
1014 em28xx_isocdbg("em28xx: called %s in mode %d\n", __func__, mode);
1016 dev->usb_ctl.urb_data_copy = urb_data_copy;
1018 if (mode == EM28XX_DIGITAL_MODE) {
1019 usb_bufs = &dev->usb_ctl.digital_bufs;
1020 /* no need to free/alloc usb buffers in digital mode */
1023 usb_bufs = &dev->usb_ctl.analog_bufs;
1028 rc = em28xx_alloc_urbs(dev, mode, xfer_bulk, num_bufs,
1029 max_pkt_size, packet_multiplier);
1035 rc = usb_clear_halt(udev, usb_bufs->urb[0]->pipe);
1037 dev_err(&dev->intf->dev,
1038 "failed to clear USB bulk endpoint stall/halt condition (error=%i)\n",
1040 em28xx_uninit_usb_xfer(dev, mode);
1045 init_waitqueue_head(&dma_q->wq);
1046 init_waitqueue_head(&vbi_dma_q->wq);
1048 em28xx_capture_start(dev, 1);
1050 /* submit urbs and enables IRQ */
1051 for (i = 0; i < usb_bufs->num_bufs; i++) {
1052 rc = usb_submit_urb(usb_bufs->urb[i], GFP_KERNEL);
1054 dev_err(&dev->intf->dev,
1055 "submit of urb %i failed (error=%i)\n", i, rc);
1056 em28xx_uninit_usb_xfer(dev, mode);
1063 EXPORT_SYMBOL_GPL(em28xx_init_usb_xfer);
1066 * Device control list
1069 static LIST_HEAD(em28xx_devlist);
1070 static DEFINE_MUTEX(em28xx_devlist_mutex);
1073 * Extension interface
1076 static LIST_HEAD(em28xx_extension_devlist);
1078 int em28xx_register_extension(struct em28xx_ops *ops)
1080 struct em28xx *dev = NULL;
1082 mutex_lock(&em28xx_devlist_mutex);
1083 list_add_tail(&ops->next, &em28xx_extension_devlist);
1084 list_for_each_entry(dev, &em28xx_devlist, devlist) {
1088 ops->init(dev->dev_next);
1091 mutex_unlock(&em28xx_devlist_mutex);
1092 pr_info("em28xx: Registered (%s) extension\n", ops->name);
1095 EXPORT_SYMBOL(em28xx_register_extension);
1097 void em28xx_unregister_extension(struct em28xx_ops *ops)
1099 struct em28xx *dev = NULL;
1101 mutex_lock(&em28xx_devlist_mutex);
1102 list_for_each_entry(dev, &em28xx_devlist, devlist) {
1105 ops->fini(dev->dev_next);
1109 list_del(&ops->next);
1110 mutex_unlock(&em28xx_devlist_mutex);
1111 pr_info("em28xx: Removed (%s) extension\n", ops->name);
1113 EXPORT_SYMBOL(em28xx_unregister_extension);
1115 void em28xx_init_extension(struct em28xx *dev)
1117 const struct em28xx_ops *ops = NULL;
1119 mutex_lock(&em28xx_devlist_mutex);
1120 list_add_tail(&dev->devlist, &em28xx_devlist);
1121 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1125 ops->init(dev->dev_next);
1128 mutex_unlock(&em28xx_devlist_mutex);
1131 void em28xx_close_extension(struct em28xx *dev)
1133 const struct em28xx_ops *ops = NULL;
1135 mutex_lock(&em28xx_devlist_mutex);
1136 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1139 ops->fini(dev->dev_next);
1143 list_del(&dev->devlist);
1144 mutex_unlock(&em28xx_devlist_mutex);
1147 int em28xx_suspend_extension(struct em28xx *dev)
1149 const struct em28xx_ops *ops = NULL;
1151 dev_info(&dev->intf->dev, "Suspending extensions\n");
1152 mutex_lock(&em28xx_devlist_mutex);
1153 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1157 ops->suspend(dev->dev_next);
1159 mutex_unlock(&em28xx_devlist_mutex);
1163 int em28xx_resume_extension(struct em28xx *dev)
1165 const struct em28xx_ops *ops = NULL;
1167 dev_info(&dev->intf->dev, "Resuming extensions\n");
1168 mutex_lock(&em28xx_devlist_mutex);
1169 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1174 ops->resume(dev->dev_next);
1176 mutex_unlock(&em28xx_devlist_mutex);