2 em28xx-core.c - driver for Empia EM2800/EM2820/2840 USB video capture devices
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>
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.
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.
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.
25 #include <linux/init.h>
26 #include <linux/list.h>
27 #include <linux/module.h>
28 #include <linux/slab.h>
29 #include <linux/usb.h>
30 #include <linux/vmalloc.h>
31 #include <sound/ac97_codec.h>
32 #include <media/v4l2-common.h>
36 /* #define ENABLE_DEBUG_ISOC_FRAMES */
38 static unsigned int core_debug;
39 module_param(core_debug, int, 0644);
40 MODULE_PARM_DESC(core_debug, "enable debug messages [core]");
42 #define em28xx_coredbg(fmt, arg...) do {\
44 printk(KERN_INFO "%s %s :"fmt, \
45 dev->name, __func__ , ##arg); } while (0)
47 static unsigned int reg_debug;
48 module_param(reg_debug, int, 0644);
49 MODULE_PARM_DESC(reg_debug, "enable debug messages [URB reg]");
51 #define em28xx_regdbg(fmt, arg...) do {\
53 printk(KERN_INFO "%s %s :"fmt, \
54 dev->name, __func__ , ##arg); } while (0)
57 #define em28xx_isocdbg(fmt, arg...) do {\
59 printk(KERN_INFO "%s %s :"fmt, \
60 dev->name, __func__ , ##arg); } while (0)
63 * em28xx_read_reg_req()
64 * reads data from the usb device specifying bRequest
66 int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
70 int pipe = usb_rcvctrlpipe(dev->udev, 0);
72 if (dev->disconnected)
75 if (len > URB_MAX_CTRL_SIZE)
79 printk(KERN_DEBUG "(pipe 0x%08x): "
80 "IN: %02x %02x %02x %02x %02x %02x %02x %02x ",
82 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
85 len & 0xff, len >> 8);
88 mutex_lock(&dev->ctrl_urb_lock);
89 ret = usb_control_msg(dev->udev, pipe, req,
90 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
91 0x0000, reg, dev->urb_buf, len, HZ);
95 mutex_unlock(&dev->ctrl_urb_lock);
96 return usb_translate_errors(ret);
100 memcpy(buf, dev->urb_buf, len);
102 mutex_unlock(&dev->ctrl_urb_lock);
108 for (byte = 0; byte < len; byte++)
109 printk(" %02x", (unsigned char)buf[byte]);
117 * em28xx_read_reg_req()
118 * reads data from the usb device specifying bRequest
120 int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg)
125 ret = em28xx_read_reg_req_len(dev, req, reg, &val, 1);
132 int em28xx_read_reg(struct em28xx *dev, u16 reg)
134 return em28xx_read_reg_req(dev, USB_REQ_GET_STATUS, reg);
136 EXPORT_SYMBOL_GPL(em28xx_read_reg);
139 * em28xx_write_regs_req()
140 * sends data to the usb device, specifying bRequest
142 int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
146 int pipe = usb_sndctrlpipe(dev->udev, 0);
148 if (dev->disconnected)
151 if ((len < 1) || (len > URB_MAX_CTRL_SIZE))
157 printk(KERN_DEBUG "(pipe 0x%08x): "
158 "OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>>",
160 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
162 reg & 0xff, reg >> 8,
163 len & 0xff, len >> 8);
165 for (byte = 0; byte < len; byte++)
166 printk(" %02x", (unsigned char)buf[byte]);
170 mutex_lock(&dev->ctrl_urb_lock);
171 memcpy(dev->urb_buf, buf, len);
172 ret = usb_control_msg(dev->udev, pipe, req,
173 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
174 0x0000, reg, dev->urb_buf, len, HZ);
175 mutex_unlock(&dev->ctrl_urb_lock);
178 return usb_translate_errors(ret);
180 if (dev->wait_after_write)
181 msleep(dev->wait_after_write);
186 int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len)
188 return em28xx_write_regs_req(dev, USB_REQ_GET_STATUS, reg, buf, len);
190 EXPORT_SYMBOL_GPL(em28xx_write_regs);
192 /* Write a single register */
193 int em28xx_write_reg(struct em28xx *dev, u16 reg, u8 val)
195 return em28xx_write_regs(dev, reg, &val, 1);
197 EXPORT_SYMBOL_GPL(em28xx_write_reg);
200 * em28xx_write_reg_bits()
201 * sets only some bits (specified by bitmask) of a register, by first reading
204 int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val,
210 oldval = em28xx_read_reg(dev, reg);
214 newval = (((u8) oldval) & ~bitmask) | (val & bitmask);
216 return em28xx_write_regs(dev, reg, &newval, 1);
218 EXPORT_SYMBOL_GPL(em28xx_write_reg_bits);
221 * em28xx_toggle_reg_bits()
222 * toggles/inverts the bits (specified by bitmask) of a register
224 int em28xx_toggle_reg_bits(struct em28xx *dev, u16 reg, u8 bitmask)
229 oldval = em28xx_read_reg(dev, reg);
233 newval = (~oldval & bitmask) | (oldval & ~bitmask);
235 return em28xx_write_reg(dev, reg, newval);
237 EXPORT_SYMBOL_GPL(em28xx_toggle_reg_bits);
240 * em28xx_is_ac97_ready()
241 * Checks if ac97 is ready
243 static int em28xx_is_ac97_ready(struct em28xx *dev)
247 /* Wait up to 50 ms for AC97 command to complete */
248 for (i = 0; i < 10; i++, msleep(5)) {
249 ret = em28xx_read_reg(dev, EM28XX_R43_AC97BUSY);
257 em28xx_warn("AC97 command still being executed: not handled properly!\n");
263 * write a 16 bit value to the specified AC97 address (LSB first!)
265 int em28xx_read_ac97(struct em28xx *dev, u8 reg)
268 u8 addr = (reg & 0x7f) | 0x80;
271 ret = em28xx_is_ac97_ready(dev);
275 ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1);
279 ret = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R40_AC97LSB,
280 (u8 *)&val, sizeof(val));
284 return le16_to_cpu(val);
286 EXPORT_SYMBOL_GPL(em28xx_read_ac97);
289 * em28xx_write_ac97()
290 * write a 16 bit value to the specified AC97 address (LSB first!)
292 int em28xx_write_ac97(struct em28xx *dev, u8 reg, u16 val)
295 u8 addr = reg & 0x7f;
298 value = cpu_to_le16(val);
300 ret = em28xx_is_ac97_ready(dev);
304 ret = em28xx_write_regs(dev, EM28XX_R40_AC97LSB, (u8 *) &value, 2);
308 ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1);
314 EXPORT_SYMBOL_GPL(em28xx_write_ac97);
316 struct em28xx_vol_itable {
317 enum em28xx_amux mux;
321 static struct em28xx_vol_itable inputs[] = {
322 { EM28XX_AMUX_VIDEO, AC97_VIDEO },
323 { EM28XX_AMUX_LINE_IN, AC97_LINE },
324 { EM28XX_AMUX_PHONE, AC97_PHONE },
325 { EM28XX_AMUX_MIC, AC97_MIC },
326 { EM28XX_AMUX_CD, AC97_CD },
327 { EM28XX_AMUX_AUX, AC97_AUX },
328 { EM28XX_AMUX_PCM_OUT, AC97_PCM },
331 static int set_ac97_input(struct em28xx *dev)
334 enum em28xx_amux amux = dev->ctl_ainput;
336 /* EM28XX_AMUX_VIDEO2 is a special case used to indicate that
337 em28xx should point to LINE IN, while AC97 should use VIDEO
339 if (amux == EM28XX_AMUX_VIDEO2)
340 amux = EM28XX_AMUX_VIDEO;
342 /* Mute all entres but the one that were selected */
343 for (i = 0; i < ARRAY_SIZE(inputs); i++) {
344 if (amux == inputs[i].mux)
345 ret = em28xx_write_ac97(dev, inputs[i].reg, 0x0808);
347 ret = em28xx_write_ac97(dev, inputs[i].reg, 0x8000);
350 em28xx_warn("couldn't setup AC97 register %d\n",
356 static int em28xx_set_audio_source(struct em28xx *dev)
361 if (dev->board.is_em2800) {
362 if (dev->ctl_ainput == EM28XX_AMUX_VIDEO)
363 input = EM2800_AUDIO_SRC_TUNER;
365 input = EM2800_AUDIO_SRC_LINE;
367 ret = em28xx_write_regs(dev, EM2800_R08_AUDIOSRC, &input, 1);
372 if (dev->board.has_msp34xx)
373 input = EM28XX_AUDIO_SRC_TUNER;
375 switch (dev->ctl_ainput) {
376 case EM28XX_AMUX_VIDEO:
377 input = EM28XX_AUDIO_SRC_TUNER;
380 input = EM28XX_AUDIO_SRC_LINE;
385 if (dev->board.mute_gpio && dev->mute)
386 em28xx_gpio_set(dev, dev->board.mute_gpio);
388 em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio);
390 ret = em28xx_write_reg_bits(dev, EM28XX_R0E_AUDIOSRC, input, 0xc0);
395 switch (dev->audio_mode.ac97) {
399 ret = set_ac97_input(dev);
405 struct em28xx_vol_otable {
406 enum em28xx_aout mux;
410 static const struct em28xx_vol_otable outputs[] = {
411 { EM28XX_AOUT_MASTER, AC97_MASTER },
412 { EM28XX_AOUT_LINE, AC97_HEADPHONE },
413 { EM28XX_AOUT_MONO, AC97_MASTER_MONO },
414 { EM28XX_AOUT_LFE, AC97_CENTER_LFE_MASTER },
415 { EM28XX_AOUT_SURR, AC97_SURROUND_MASTER },
418 int em28xx_audio_analog_set(struct em28xx *dev)
423 if (!dev->audio_mode.has_audio)
426 /* It is assumed that all devices use master volume for output.
427 It would be possible to use also line output.
429 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
430 /* Mute all outputs */
431 for (i = 0; i < ARRAY_SIZE(outputs); i++) {
432 ret = em28xx_write_ac97(dev, outputs[i].reg, 0x8000);
434 em28xx_warn("couldn't setup AC97 register %d\n",
439 xclk = dev->board.xclk & 0x7f;
441 xclk |= EM28XX_XCLK_AUDIO_UNMUTE;
443 ret = em28xx_write_reg(dev, EM28XX_R0F_XCLK, xclk);
448 /* Selects the proper audio input */
449 ret = em28xx_set_audio_source(dev);
452 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
455 em28xx_write_ac97(dev, AC97_POWERDOWN, 0x4200);
456 em28xx_write_ac97(dev, AC97_EXTENDED_STATUS, 0x0031);
457 em28xx_write_ac97(dev, AC97_PCM_LR_ADC_RATE, 0xbb80);
459 /* LSB: left channel - both channels with the same level */
460 vol = (0x1f - dev->volume) | ((0x1f - dev->volume) << 8);
462 /* Mute device, if needed */
467 for (i = 0; i < ARRAY_SIZE(outputs); i++) {
468 if (dev->ctl_aoutput & outputs[i].mux)
469 ret = em28xx_write_ac97(dev, outputs[i].reg,
472 em28xx_warn("couldn't setup AC97 register %d\n",
476 if (dev->ctl_aoutput & EM28XX_AOUT_PCM_IN) {
477 int sel = ac97_return_record_select(dev->ctl_aoutput);
479 /* Use the same input for both left and right
483 em28xx_write_ac97(dev, AC97_REC_SEL, sel);
489 EXPORT_SYMBOL_GPL(em28xx_audio_analog_set);
491 int em28xx_audio_setup(struct em28xx *dev)
493 int vid1, vid2, feat, cfg;
496 if (dev->chip_id == CHIP_ID_EM2870 ||
497 dev->chip_id == CHIP_ID_EM2874 ||
498 dev->chip_id == CHIP_ID_EM28174 ||
499 dev->chip_id == CHIP_ID_EM28178) {
500 /* Digital only device - don't load any alsa module */
501 dev->audio_mode.has_audio = false;
502 dev->has_audio_class = false;
503 dev->has_alsa_audio = false;
507 dev->audio_mode.has_audio = true;
509 /* See how this device is configured */
510 cfg = em28xx_read_reg(dev, EM28XX_R00_CHIPCFG);
511 em28xx_info("Config register raw data: 0x%02x\n", cfg);
513 /* Register read error? */
514 cfg = EM28XX_CHIPCFG_AC97; /* Be conservative */
515 } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) == 0x00) {
516 /* The device doesn't have vendor audio at all */
517 dev->has_alsa_audio = false;
518 dev->audio_mode.has_audio = false;
520 } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) ==
521 EM28XX_CHIPCFG_I2S_3_SAMPRATES) {
522 em28xx_info("I2S Audio (3 sample rates)\n");
523 dev->audio_mode.i2s_3rates = 1;
524 } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) ==
525 EM28XX_CHIPCFG_I2S_5_SAMPRATES) {
526 em28xx_info("I2S Audio (5 sample rates)\n");
527 dev->audio_mode.i2s_5rates = 1;
530 if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) != EM28XX_CHIPCFG_AC97) {
531 /* Skip the code that does AC97 vendor detection */
532 dev->audio_mode.ac97 = EM28XX_NO_AC97;
536 dev->audio_mode.ac97 = EM28XX_AC97_OTHER;
538 vid1 = em28xx_read_ac97(dev, AC97_VENDOR_ID1);
541 * Device likely doesn't support AC97
542 * Note: (some) em2800 devices without eeprom reports 0x91 on
543 * CHIPCFG register, even not having an AC97 chip
545 em28xx_warn("AC97 chip type couldn't be determined\n");
546 dev->audio_mode.ac97 = EM28XX_NO_AC97;
547 dev->has_alsa_audio = false;
548 dev->audio_mode.has_audio = false;
552 vid2 = em28xx_read_ac97(dev, AC97_VENDOR_ID2);
556 vid = vid1 << 16 | vid2;
558 dev->audio_mode.ac97_vendor_id = vid;
559 em28xx_warn("AC97 vendor ID = 0x%08x\n", vid);
561 feat = em28xx_read_ac97(dev, AC97_RESET);
565 dev->audio_mode.ac97_feat = feat;
566 em28xx_warn("AC97 features = 0x%04x\n", feat);
568 /* Try to identify what audio processor we have */
569 if (((vid == 0xffffffff) || (vid == 0x83847650)) && (feat == 0x6a90))
570 dev->audio_mode.ac97 = EM28XX_AC97_EM202;
571 else if ((vid >> 8) == 0x838476)
572 dev->audio_mode.ac97 = EM28XX_AC97_SIGMATEL;
575 /* Reports detected AC97 processor */
576 switch (dev->audio_mode.ac97) {
578 em28xx_info("No AC97 audio processor\n");
580 case EM28XX_AC97_EM202:
581 em28xx_info("Empia 202 AC97 audio processor detected\n");
583 case EM28XX_AC97_SIGMATEL:
584 em28xx_info("Sigmatel audio processor detected(stac 97%02x)\n",
585 dev->audio_mode.ac97_vendor_id & 0xff);
587 case EM28XX_AC97_OTHER:
588 em28xx_warn("Unknown AC97 audio processor detected!\n");
594 return em28xx_audio_analog_set(dev);
596 EXPORT_SYMBOL_GPL(em28xx_audio_setup);
598 const struct em28xx_led *em28xx_find_led(struct em28xx *dev,
599 enum em28xx_led_role role)
601 if (dev->board.leds) {
603 while (dev->board.leds[k].role >= 0 &&
604 dev->board.leds[k].role < EM28XX_NUM_LED_ROLES) {
605 if (dev->board.leds[k].role == role)
606 return &dev->board.leds[k];
612 EXPORT_SYMBOL_GPL(em28xx_find_led);
614 int em28xx_capture_start(struct em28xx *dev, int start)
618 if (dev->chip_id == CHIP_ID_EM2874 ||
619 dev->chip_id == CHIP_ID_EM2884 ||
620 dev->chip_id == CHIP_ID_EM28174 ||
621 dev->chip_id == CHIP_ID_EM28178) {
622 /* The Transport Stream Enable Register moved in em2874 */
623 rc = em28xx_write_reg_bits(dev, EM2874_R5F_TS_ENABLE,
625 EM2874_TS1_CAPTURE_ENABLE : 0x00,
626 EM2874_TS1_CAPTURE_ENABLE);
628 /* FIXME: which is the best order? */
629 /* video registers are sampled by VREF */
630 rc = em28xx_write_reg_bits(dev, EM28XX_R0C_USBSUSP,
631 start ? 0x10 : 0x00, 0x10);
636 if (dev->board.is_webcam)
637 rc = em28xx_write_reg(dev, 0x13, 0x0c);
639 /* Enable video capture */
640 rc = em28xx_write_reg(dev, 0x48, 0x00);
642 if (dev->mode == EM28XX_ANALOG_MODE)
643 rc = em28xx_write_reg(dev,
644 EM28XX_R12_VINENABLE, 0x67);
646 rc = em28xx_write_reg(dev,
647 EM28XX_R12_VINENABLE, 0x37);
651 /* disable video capture */
652 rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x27);
659 /* Switch (explicitly controlled) analog capturing LED on/off */
660 if (dev->mode == EM28XX_ANALOG_MODE) {
661 const struct em28xx_led *led;
662 led = em28xx_find_led(dev, EM28XX_LED_ANALOG_CAPTURING);
664 em28xx_write_reg_bits(dev, led->gpio_reg,
665 (!start ^ led->inverted) ?
666 ~led->gpio_mask : led->gpio_mask,
673 int em28xx_gpio_set(struct em28xx *dev, struct em28xx_reg_seq *gpio)
680 if (dev->mode != EM28XX_SUSPEND) {
681 em28xx_write_reg(dev, 0x48, 0x00);
682 if (dev->mode == EM28XX_ANALOG_MODE)
683 em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x67);
685 em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x37);
689 /* Send GPIO reset sequences specified at board entry */
690 while (gpio->sleep >= 0) {
691 if (gpio->reg >= 0) {
692 rc = em28xx_write_reg_bits(dev,
706 EXPORT_SYMBOL_GPL(em28xx_gpio_set);
708 int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode)
710 if (dev->mode == set_mode)
713 if (set_mode == EM28XX_SUSPEND) {
714 dev->mode = set_mode;
716 /* FIXME: add suspend support for ac97 */
718 return em28xx_gpio_set(dev, dev->board.suspend_gpio);
721 dev->mode = set_mode;
723 if (dev->mode == EM28XX_DIGITAL_MODE)
724 return em28xx_gpio_set(dev, dev->board.dvb_gpio);
726 return em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio);
728 EXPORT_SYMBOL_GPL(em28xx_set_mode);
730 /* ------------------------------------------------------------------
732 ------------------------------------------------------------------*/
735 * URB completion handler for isoc/bulk transfers
737 static void em28xx_irq_callback(struct urb *urb)
739 struct em28xx *dev = urb->context;
742 switch (urb->status) {
743 case 0: /* success */
744 case -ETIMEDOUT: /* NAK */
746 case -ECONNRESET: /* kill */
751 em28xx_isocdbg("urb completition error %d.\n", urb->status);
755 /* Copy data from URB */
756 spin_lock(&dev->slock);
757 dev->usb_ctl.urb_data_copy(dev, urb);
758 spin_unlock(&dev->slock);
760 /* Reset urb buffers */
761 for (i = 0; i < urb->number_of_packets; i++) {
762 /* isoc only (bulk: number_of_packets = 0) */
763 urb->iso_frame_desc[i].status = 0;
764 urb->iso_frame_desc[i].actual_length = 0;
768 urb->status = usb_submit_urb(urb, GFP_ATOMIC);
770 em28xx_isocdbg("urb resubmit failed (error=%i)\n",
776 * Stop and Deallocate URBs
778 void em28xx_uninit_usb_xfer(struct em28xx *dev, enum em28xx_mode mode)
781 struct em28xx_usb_bufs *usb_bufs;
784 em28xx_isocdbg("em28xx: called em28xx_uninit_usb_xfer in mode %d\n",
787 if (mode == EM28XX_DIGITAL_MODE)
788 usb_bufs = &dev->usb_ctl.digital_bufs;
790 usb_bufs = &dev->usb_ctl.analog_bufs;
792 for (i = 0; i < usb_bufs->num_bufs; i++) {
793 urb = usb_bufs->urb[i];
795 if (!irqs_disabled())
800 if (usb_bufs->transfer_buffer[i]) {
801 usb_free_coherent(dev->udev,
802 urb->transfer_buffer_length,
803 usb_bufs->transfer_buffer[i],
807 usb_bufs->urb[i] = NULL;
809 usb_bufs->transfer_buffer[i] = NULL;
812 kfree(usb_bufs->urb);
813 kfree(usb_bufs->transfer_buffer);
815 usb_bufs->urb = NULL;
816 usb_bufs->transfer_buffer = NULL;
817 usb_bufs->num_bufs = 0;
819 em28xx_capture_start(dev, 0);
821 EXPORT_SYMBOL_GPL(em28xx_uninit_usb_xfer);
826 void em28xx_stop_urbs(struct em28xx *dev)
830 struct em28xx_usb_bufs *isoc_bufs = &dev->usb_ctl.digital_bufs;
832 em28xx_isocdbg("em28xx: called em28xx_stop_urbs\n");
834 for (i = 0; i < isoc_bufs->num_bufs; i++) {
835 urb = isoc_bufs->urb[i];
837 if (!irqs_disabled())
844 em28xx_capture_start(dev, 0);
846 EXPORT_SYMBOL_GPL(em28xx_stop_urbs);
851 int em28xx_alloc_urbs(struct em28xx *dev, enum em28xx_mode mode, int xfer_bulk,
852 int num_bufs, int max_pkt_size, int packet_multiplier)
854 struct em28xx_usb_bufs *usb_bufs;
860 em28xx_isocdbg("em28xx: called em28xx_alloc_isoc in mode %d\n", mode);
862 /* Check mode and if we have an endpoint for the selected
863 transfer type, select buffer */
864 if (mode == EM28XX_DIGITAL_MODE) {
865 if ((xfer_bulk && !dev->dvb_ep_bulk) ||
866 (!xfer_bulk && !dev->dvb_ep_isoc)) {
867 em28xx_errdev("no endpoint for DVB mode and transfer type %d\n",
871 usb_bufs = &dev->usb_ctl.digital_bufs;
872 } else if (mode == EM28XX_ANALOG_MODE) {
873 if ((xfer_bulk && !dev->analog_ep_bulk) ||
874 (!xfer_bulk && !dev->analog_ep_isoc)) {
875 em28xx_errdev("no endpoint for analog mode and transfer type %d\n",
879 usb_bufs = &dev->usb_ctl.analog_bufs;
881 em28xx_errdev("invalid mode selected\n");
885 /* De-allocates all pending stuff */
886 em28xx_uninit_usb_xfer(dev, mode);
888 usb_bufs->num_bufs = num_bufs;
890 usb_bufs->urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL);
891 if (!usb_bufs->urb) {
892 em28xx_errdev("cannot alloc memory for usb buffers\n");
896 usb_bufs->transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
898 if (!usb_bufs->transfer_buffer) {
899 em28xx_errdev("cannot allocate memory for usb transfer\n");
900 kfree(usb_bufs->urb);
904 usb_bufs->max_pkt_size = max_pkt_size;
906 usb_bufs->num_packets = 0;
908 usb_bufs->num_packets = packet_multiplier;
909 dev->usb_ctl.vid_buf = NULL;
910 dev->usb_ctl.vbi_buf = NULL;
912 sb_size = packet_multiplier * usb_bufs->max_pkt_size;
914 /* allocate urbs and transfer buffers */
915 for (i = 0; i < usb_bufs->num_bufs; i++) {
916 urb = usb_alloc_urb(usb_bufs->num_packets, GFP_KERNEL);
918 em28xx_err("cannot alloc usb_ctl.urb %i\n", i);
919 em28xx_uninit_usb_xfer(dev, mode);
922 usb_bufs->urb[i] = urb;
924 usb_bufs->transfer_buffer[i] = usb_alloc_coherent(dev->udev,
925 sb_size, GFP_KERNEL, &urb->transfer_dma);
926 if (!usb_bufs->transfer_buffer[i]) {
927 em28xx_err("unable to allocate %i bytes for transfer"
930 in_interrupt() ? " while in int" : "");
931 em28xx_uninit_usb_xfer(dev, mode);
934 memset(usb_bufs->transfer_buffer[i], 0, sb_size);
936 if (xfer_bulk) { /* bulk */
937 pipe = usb_rcvbulkpipe(dev->udev,
938 mode == EM28XX_ANALOG_MODE ?
939 dev->analog_ep_bulk :
941 usb_fill_bulk_urb(urb, dev->udev, pipe,
942 usb_bufs->transfer_buffer[i], sb_size,
943 em28xx_irq_callback, dev);
944 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
946 pipe = usb_rcvisocpipe(dev->udev,
947 mode == EM28XX_ANALOG_MODE ?
948 dev->analog_ep_isoc :
950 usb_fill_int_urb(urb, dev->udev, pipe,
951 usb_bufs->transfer_buffer[i], sb_size,
952 em28xx_irq_callback, dev, 1);
953 urb->transfer_flags = URB_ISO_ASAP |
954 URB_NO_TRANSFER_DMA_MAP;
956 for (j = 0; j < usb_bufs->num_packets; j++) {
957 urb->iso_frame_desc[j].offset = k;
958 urb->iso_frame_desc[j].length =
959 usb_bufs->max_pkt_size;
960 k += usb_bufs->max_pkt_size;
964 urb->number_of_packets = usb_bufs->num_packets;
969 EXPORT_SYMBOL_GPL(em28xx_alloc_urbs);
972 * Allocate URBs and start IRQ
974 int em28xx_init_usb_xfer(struct em28xx *dev, enum em28xx_mode mode,
975 int xfer_bulk, int num_bufs, int max_pkt_size,
976 int packet_multiplier,
977 int (*urb_data_copy) (struct em28xx *dev, struct urb *urb))
979 struct em28xx_dmaqueue *dma_q = &dev->vidq;
980 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
981 struct em28xx_usb_bufs *usb_bufs;
986 em28xx_isocdbg("em28xx: called em28xx_init_usb_xfer in mode %d\n",
989 dev->usb_ctl.urb_data_copy = urb_data_copy;
991 if (mode == EM28XX_DIGITAL_MODE) {
992 usb_bufs = &dev->usb_ctl.digital_bufs;
993 /* no need to free/alloc usb buffers in digital mode */
996 usb_bufs = &dev->usb_ctl.analog_bufs;
1001 rc = em28xx_alloc_urbs(dev, mode, xfer_bulk, num_bufs,
1002 max_pkt_size, packet_multiplier);
1008 rc = usb_clear_halt(dev->udev, usb_bufs->urb[0]->pipe);
1010 em28xx_err("failed to clear USB bulk endpoint stall/halt condition (error=%i)\n",
1012 em28xx_uninit_usb_xfer(dev, mode);
1017 init_waitqueue_head(&dma_q->wq);
1018 init_waitqueue_head(&vbi_dma_q->wq);
1020 em28xx_capture_start(dev, 1);
1022 /* submit urbs and enables IRQ */
1023 for (i = 0; i < usb_bufs->num_bufs; i++) {
1024 rc = usb_submit_urb(usb_bufs->urb[i], GFP_ATOMIC);
1026 em28xx_err("submit of urb %i failed (error=%i)\n", i,
1028 em28xx_uninit_usb_xfer(dev, mode);
1035 EXPORT_SYMBOL_GPL(em28xx_init_usb_xfer);
1038 * Device control list
1041 static LIST_HEAD(em28xx_devlist);
1042 static DEFINE_MUTEX(em28xx_devlist_mutex);
1045 * Extension interface
1048 static LIST_HEAD(em28xx_extension_devlist);
1050 int em28xx_register_extension(struct em28xx_ops *ops)
1052 struct em28xx *dev = NULL;
1054 mutex_lock(&em28xx_devlist_mutex);
1055 list_add_tail(&ops->next, &em28xx_extension_devlist);
1056 list_for_each_entry(dev, &em28xx_devlist, devlist) {
1059 mutex_unlock(&em28xx_devlist_mutex);
1060 printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
1063 EXPORT_SYMBOL(em28xx_register_extension);
1065 void em28xx_unregister_extension(struct em28xx_ops *ops)
1067 struct em28xx *dev = NULL;
1069 mutex_lock(&em28xx_devlist_mutex);
1070 list_for_each_entry(dev, &em28xx_devlist, devlist) {
1073 list_del(&ops->next);
1074 mutex_unlock(&em28xx_devlist_mutex);
1075 printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
1077 EXPORT_SYMBOL(em28xx_unregister_extension);
1079 void em28xx_init_extension(struct em28xx *dev)
1081 const struct em28xx_ops *ops = NULL;
1083 mutex_lock(&em28xx_devlist_mutex);
1084 list_add_tail(&dev->devlist, &em28xx_devlist);
1085 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1089 mutex_unlock(&em28xx_devlist_mutex);
1092 void em28xx_close_extension(struct em28xx *dev)
1094 const struct em28xx_ops *ops = NULL;
1096 mutex_lock(&em28xx_devlist_mutex);
1097 mutex_lock(&dev->lock);
1098 list_for_each_entry(ops, &em28xx_extension_devlist, next) {
1102 mutex_unlock(&dev->lock);
1103 list_del(&dev->devlist);
1104 mutex_unlock(&em28xx_devlist_mutex);