cregit-Linux how code gets into the kernel

Release 4.11 drivers/media/usb/em28xx/em28xx-core.c

/*
   em28xx-core.c - driver for Empia EM2800/EM2820/2840 USB video capture devices

   Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
                      Markus Rechberger <mrechberger@gmail.com>
                      Mauro Carvalho Chehab <mchehab@infradead.org>
                      Sascha Sommer <saschasommer@freenet.de>
   Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "em28xx.h"

#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/vmalloc.h>
#include <sound/ac97_codec.h>
#include <media/v4l2-common.h>


#define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
                      "Markus Rechberger <mrechberger@gmail.com>, " \
                      "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
                      "Sascha Sommer <saschasommer@freenet.de>"


MODULE_AUTHOR(DRIVER_AUTHOR);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

MODULE_VERSION(EM28XX_VERSION);

/* #define ENABLE_DEBUG_ISOC_FRAMES */


static unsigned int core_debug;
module_param(core_debug, int, 0644);
MODULE_PARM_DESC(core_debug, "enable debug messages [core and isoc]");


#define em28xx_coredbg(fmt, arg...) do {                            \
        if (core_debug)                                                 \
                dev_printk(KERN_DEBUG, &dev->intf->dev,                 \
                           "core: %s: " fmt, __func__, ## arg);         \
} while (0)


static unsigned int reg_debug;
module_param(reg_debug, int, 0644);
MODULE_PARM_DESC(reg_debug, "enable debug messages [URB reg]");



#define em28xx_regdbg(fmt, arg...) do {                            \
        if (reg_debug)                                                  \
                dev_printk(KERN_DEBUG, &dev->intf->dev,                 \
                           "reg: %s: " fmt, __func__, ## arg);          \
} while (0)

/* FIXME: don't abuse core_debug */

#define em28xx_isocdbg(fmt, arg...) do {                            \
        if (core_debug)                                                 \
                dev_printk(KERN_DEBUG, &dev->intf->dev,                 \
                           "core: %s: " fmt, __func__, ## arg);         \
} while (0)

/*
 * em28xx_read_reg_req()
 * reads data from the usb device specifying bRequest
 */

int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg, char *buf, int len) { int ret; struct usb_device *udev = interface_to_usbdev(dev->intf); int pipe = usb_rcvctrlpipe(udev, 0); if (dev->disconnected) return -ENODEV; if (len > URB_MAX_CTRL_SIZE) return -EINVAL; em28xx_regdbg("(pipe 0x%08x): IN: %02x %02x %02x %02x %02x %02x %02x %02x ", pipe, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, req, 0, 0, reg & 0xff, reg >> 8, len & 0xff, len >> 8); mutex_lock(&dev->ctrl_urb_lock); ret = usb_control_msg(udev, pipe, req, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0x0000, reg, dev->urb_buf, len, HZ); if (ret < 0) { em28xx_regdbg("(pipe 0x%08x): IN: %02x %02x %02x %02x %02x %02x %02x %02x failed\n", pipe, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, req, 0, 0, reg & 0xff, reg >> 8, len & 0xff, len >> 8); mutex_unlock(&dev->ctrl_urb_lock); return usb_translate_errors(ret); } if (len) memcpy(buf, dev->urb_buf, len); mutex_unlock(&dev->ctrl_urb_lock); em28xx_regdbg("(pipe 0x%08x): IN: %02x %02x %02x %02x %02x %02x %02x %02x failed <<< %*ph\n", pipe, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, req, 0, 0, reg & 0xff, reg >> 8, len & 0xff, len >> 8, len, buf); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab23288.55%866.67%
Andrew Morton249.16%18.33%
Frank Schäfer41.53%216.67%
Sascha Sommer20.76%18.33%
Total262100.00%12100.00%

/* * em28xx_read_reg_req() * reads data from the usb device specifying bRequest */
int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg) { int ret; u8 val; ret = em28xx_read_reg_req_len(dev, req, reg, &val, 1); if (ret < 0) return ret; return val; }

Contributors

PersonTokensPropCommitsCommitProp
Andrew Morton3570.00%120.00%
Mauro Carvalho Chehab1530.00%480.00%
Total50100.00%5100.00%


int em28xx_read_reg(struct em28xx *dev, u16 reg) { return em28xx_read_reg_req(dev, USB_REQ_GET_STATUS, reg); }

Contributors

PersonTokensPropCommitsCommitProp
Andrew Morton2086.96%150.00%
Mauro Carvalho Chehab313.04%150.00%
Total23100.00%2100.00%

EXPORT_SYMBOL_GPL(em28xx_read_reg); /* * em28xx_write_regs_req() * sends data to the usb device, specifying bRequest */
int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf, int len) { int ret; struct usb_device *udev = interface_to_usbdev(dev->intf); int pipe = usb_sndctrlpipe(udev, 0); if (dev->disconnected) return -ENODEV; if ((len < 1) || (len > URB_MAX_CTRL_SIZE)) return -EINVAL; em28xx_regdbg("(pipe 0x%08x): OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>> %*ph\n", pipe, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, req, 0, 0, reg & 0xff, reg >> 8, len & 0xff, len >> 8, len, buf); mutex_lock(&dev->ctrl_urb_lock); memcpy(dev->urb_buf, buf, len); ret = usb_control_msg(udev, pipe, req, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0x0000, reg, dev->urb_buf, len, HZ); mutex_unlock(&dev->ctrl_urb_lock); if (ret < 0) return usb_translate_errors(ret); if (dev->wait_after_write) msleep(dev->wait_after_write); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab11256.28%866.67%
Andrew Morton6532.66%18.33%
Frank Schäfer136.53%216.67%
Markus Rechberger94.52%18.33%
Total199100.00%12100.00%


int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len) { return em28xx_write_regs_req(dev, USB_REQ_GET_STATUS, reg, buf, len); }

Contributors

PersonTokensPropCommitsCommitProp
Andrew Morton3088.24%133.33%
Mauro Carvalho Chehab38.82%133.33%
Frank Schäfer12.94%133.33%
Total34100.00%3100.00%

EXPORT_SYMBOL_GPL(em28xx_write_regs); /* Write a single register */
int em28xx_write_reg(struct em28xx *dev, u16 reg, u8 val) { return em28xx_write_regs(dev, reg, &val, 1); }

Contributors

PersonTokensPropCommitsCommitProp
Devin Heitmueller29100.00%1100.00%
Total29100.00%1100.00%

EXPORT_SYMBOL_GPL(em28xx_write_reg); /* * em28xx_write_reg_bits() * sets only some bits (specified by bitmask) of a register, by first reading * the actual value */
int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val, u8 bitmask) { int oldval; u8 newval; oldval = em28xx_read_reg(dev, reg); if (oldval < 0) return oldval; newval = (((u8)oldval) & ~bitmask) | (val & bitmask); return em28xx_write_regs(dev, reg, &newval, 1); }

Contributors

PersonTokensPropCommitsCommitProp
Andrew Morton6889.47%133.33%
Mauro Carvalho Chehab45.26%133.33%
Douglas Schilling Landgraf45.26%133.33%
Total76100.00%3100.00%

EXPORT_SYMBOL_GPL(em28xx_write_reg_bits); /* * em28xx_toggle_reg_bits() * toggles/inverts the bits (specified by bitmask) of a register */
int em28xx_toggle_reg_bits(struct em28xx *dev, u16 reg, u8 bitmask) { int oldval; u8 newval; oldval = em28xx_read_reg(dev, reg); if (oldval < 0) return oldval; newval = (~oldval & bitmask) | (oldval & ~bitmask); return em28xx_write_reg(dev, reg, newval); }

Contributors

PersonTokensPropCommitsCommitProp
Frank Schäfer66100.00%1100.00%
Total66100.00%1100.00%

EXPORT_SYMBOL_GPL(em28xx_toggle_reg_bits); /* * em28xx_is_ac97_ready() * Checks if ac97 is ready */
static int em28xx_is_ac97_ready(struct em28xx *dev) { unsigned long timeout = jiffies + msecs_to_jiffies(EM28XX_AC97_XFER_TIMEOUT); int ret; /* Wait up to 50 ms for AC97 command to complete */ while (time_is_after_jiffies(timeout)) { ret = em28xx_read_reg(dev, EM28XX_R43_AC97BUSY); if (ret < 0) return ret; if (!(ret & 0x01)) return 0; msleep(5); } dev_warn(&dev->intf->dev, "AC97 command still being executed: not handled properly!\n"); return -EBUSY; }

Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab4552.33%866.67%
Andrew Morton3540.70%18.33%
Douglas Schilling Landgraf44.65%18.33%
Julia Lawall11.16%18.33%
Michael Ira Krufky11.16%18.33%
Total86100.00%12100.00%

/* * em28xx_read_ac97() * write a 16 bit value to the specified AC97 address (LSB first!) */
int em28xx_read_ac97(struct em28xx *dev, u8 reg) { int ret; u8 addr = (reg & 0x7f) | 0x80; __le16 val; ret = em28xx_is_ac97_ready(dev); if (ret < 0) return ret; ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1); if (ret < 0) return ret; ret = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R40_AC97LSB, (u8 *)&val, sizeof(val)); if (ret < 0) return ret; return le16_to_cpu(val); }

Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab10798.17%250.00%
Hans Verkuil10.92%125.00%
Andrew Morton10.92%125.00%
Total109100.00%4100.00%

EXPORT_SYMBOL_GPL(em28xx_read_ac97); /* * em28xx_write_ac97() * write a 16 bit value to the specified AC97 address (LSB first!) */
int em28xx_write_ac97(struct em28xx *dev, u8 reg, u16 val) { int ret; u8 addr = reg & 0x7f; __le16 value; value = cpu_to_le16(val); ret = em28xx_is_ac97_ready(dev); if (ret < 0) return ret; ret = em28xx_write_regs(dev, EM28XX_R40_AC97LSB, (u8 *)&value, 2); if (ret < 0) return ret; ret = em28xx_write_regs(dev, EM28XX_R42_AC97ADDR, &addr, 1); if (ret < 0) return ret; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab9085.71%480.00%
Andrew Morton1514.29%120.00%
Total105100.00%5100.00%

EXPORT_SYMBOL_GPL(em28xx_write_ac97); struct em28xx_vol_itable { enum em28xx_amux mux; u8 reg; }; static struct em28xx_vol_itable inputs[] = { { EM28XX_AMUX_VIDEO, AC97_VIDEO }, { EM28XX_AMUX_LINE_IN, AC97_LINE }, { EM28XX_AMUX_PHONE, AC97_PHONE }, { EM28XX_AMUX_MIC, AC97_MIC }, { EM28XX_AMUX_CD, AC97_CD }, { EM28XX_AMUX_AUX, AC97_AUX }, { EM28XX_AMUX_PCM_OUT, AC97_PCM }, };
static int set_ac97_input(struct em28xx *dev) { int ret, i; enum em28xx_amux amux = dev->ctl_ainput; /* EM28XX_AMUX_VIDEO2 is a special case used to indicate that em28xx should point to LINE IN, while AC97 should use VIDEO */ if (amux == EM28XX_AMUX_VIDEO2) amux = EM28XX_AMUX_VIDEO; /* Mute all entres but the one that were selected */ for (i = 0; i < ARRAY_SIZE(inputs); i++) { if (amux == inputs[i].mux) ret = em28xx_write_ac97(dev, inputs[i].reg, 0x0808); else ret = em28xx_write_ac97(dev, inputs[i].reg, 0x8000); if (ret < 0) dev_warn(&dev->intf->dev, "couldn't setup AC97 register %d\n", inputs[i].reg); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab126100.00%8100.00%
Total126100.00%8100.00%


static int em28xx_set_audio_source(struct em28xx *dev) { int ret; u8 input; if (dev->board.is_em2800) { if (dev->ctl_ainput == EM28XX_AMUX_VIDEO) input = EM2800_AUDIO_SRC_TUNER; else input = EM2800_AUDIO_SRC_LINE; ret = em28xx_write_regs(dev, EM2800_R08_AUDIOSRC, &input, 1); if (ret < 0) return ret; } if (dev->board.has_msp34xx) input = EM28XX_AUDIO_SRC_TUNER; else { switch (dev->ctl_ainput) { case EM28XX_AMUX_VIDEO: input = EM28XX_AUDIO_SRC_TUNER; break; default: input = EM28XX_AUDIO_SRC_LINE; break; } } if (dev->board.mute_gpio && dev->mute) em28xx_gpio_set(dev, dev->board.mute_gpio); else em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio); ret = em28xx_write_reg_bits(dev, EM28XX_R0E_AUDIOSRC, input, 0xc0); if (ret < 0) return ret; msleep(5); switch (dev->audio_mode.ac97) { case EM28XX_NO_AC97: break; default: ret = set_ac97_input(dev); } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab15479.38%571.43%
Vitaly Wool3819.59%114.29%
Andrew Morton21.03%114.29%
Total194100.00%7100.00%

struct em28xx_vol_otable { enum em28xx_aout mux; u8 reg; }; static const struct em28xx_vol_otable outputs[] = { { EM28XX_AOUT_MASTER, AC97_MASTER }, { EM28XX_AOUT_LINE, AC97_HEADPHONE }, { EM28XX_AOUT_MONO, AC97_MASTER_MONO }, { EM28XX_AOUT_LFE, AC97_CENTER_LFE_MASTER }, { EM28XX_AOUT_SURR, AC97_SURROUND_MASTER }, };
int em28xx_audio_analog_set(struct em28xx *dev) { int ret, i; u8 xclk; if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) return 0; /* It is assumed that all devices use master volume for output. It would be possible to use also line output. */ if (dev->audio_mode.ac97 != EM28XX_NO_AC97) { /* Mute all outputs */ for (i = 0; i < ARRAY_SIZE(outputs); i++) { ret = em28xx_write_ac97(dev, outputs[i].reg, 0x8000); if (ret < 0) dev_warn(&dev->intf->dev, "couldn't setup AC97 register %d\n", outputs[i].reg); } } xclk = dev->board.xclk & 0x7f; if (!dev->mute) xclk |= EM28XX_XCLK_AUDIO_UNMUTE; ret = em28xx_write_reg(dev, EM28XX_R0F_XCLK, xclk); if (ret < 0) return ret; msleep(10); /* Selects the proper audio input */ ret = em28xx_set_audio_source(dev); /* Sets volume */ if (dev->audio_mode.ac97 != EM28XX_NO_AC97) { int vol; em28xx_write_ac97(dev, AC97_POWERDOWN, 0x4200); em28xx_write_ac97(dev, AC97_EXTENDED_STATUS, 0x0031); em28xx_write_ac97(dev, AC97_PCM_LR_ADC_RATE, 0xbb80); /* LSB: left channel - both channels with the same level */ vol = (0x1f - dev->volume) | ((0x1f - dev->volume) << 8); /* Mute device, if needed */ if (dev->mute) vol |= 0x8000; /* Sets volume */ for (i = 0; i < ARRAY_SIZE(outputs); i++) { if (dev->ctl_aoutput & outputs[i].mux) ret = em28xx_write_ac97(dev, outputs[i].reg, vol); if (ret < 0) dev_warn(&dev->intf->dev, "couldn't setup AC97 register %d\n", outputs[i].reg); } if (dev->ctl_aoutput & EM28XX_AOUT_PCM_IN) { int sel = ac97_return_record_select(dev->ctl_aoutput); /* Use the same input for both left and right channels */ sel |= (sel << 8); em28xx_write_ac97(dev, AC97_REC_SEL, sel); } } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab31490.49%964.29%
Robert Krakora257.20%214.29%
Ezequiel García41.15%17.14%
Frank Schäfer30.86%17.14%
Nicola Soranzo10.29%17.14%
Total347100.00%14100.00%

EXPORT_SYMBOL_GPL(em28xx_audio_analog_set);
int em28xx_audio_setup(struct em28xx *dev) { int vid1, vid2, feat, cfg; u32 vid = 0; u8 i2s_samplerates; if (dev->chip_id == CHIP_ID_EM2870 || dev->chip_id == CHIP_ID_EM2874 || dev->chip_id == CHIP_ID_EM28174 || dev->chip_id == CHIP_ID_EM28178) { /* Digital only device - don't load any alsa module */ dev->int_audio_type = EM28XX_INT_AUDIO_NONE; dev->usb_audio_type = EM28XX_USB_AUDIO_NONE; return 0; } /* See how this device is configured */ cfg = em28xx_read_reg(dev, EM28XX_R00_CHIPCFG); dev_info(&dev->intf->dev, "Config register raw data: 0x%02x\n", cfg); if (cfg < 0) { /* Register read error */ /* Be conservative */ dev->int_audio_type = EM28XX_INT_AUDIO_AC97; } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) == 0x00) { /* The device doesn't have vendor audio at all */ dev->int_audio_type = EM28XX_INT_AUDIO_NONE; dev->usb_audio_type = EM28XX_USB_AUDIO_NONE; return 0; } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) != EM28XX_CHIPCFG_AC97) { dev->int_audio_type = EM28XX_INT_AUDIO_I2S; if (dev->chip_id < CHIP_ID_EM2860 && (cfg & EM28XX_CHIPCFG_AUDIOMASK) == EM2820_CHIPCFG_I2S_1_SAMPRATE) i2s_samplerates = 1; else if (dev->chip_id >= CHIP_ID_EM2860 && (cfg & EM28XX_CHIPCFG_AUDIOMASK) == EM2860_CHIPCFG_I2S_5_SAMPRATES) i2s_samplerates = 5; else i2s_samplerates = 3; dev_info(&dev->intf->dev, "I2S Audio (%d sample rate(s))\n", i2s_samplerates); /* Skip the code that does AC97 vendor detection */ dev->audio_mode.ac97 = EM28XX_NO_AC97; goto init_audio; } else { dev->int_audio_type = EM28XX_INT_AUDIO_AC97; } dev->audio_mode.ac97 = EM28XX_AC97_OTHER; vid1 = em28xx_read_ac97(dev, AC97_VENDOR_ID1); if (vid1 < 0) { /* * Device likely doesn't support AC97 * Note: (some) em2800 devices without eeprom reports 0x91 on * CHIPCFG register, even not having an AC97 chip */ dev_warn(&dev->intf->dev, "AC97 chip type couldn't be determined\n"); dev->audio_mode.ac97 = EM28XX_NO_AC97; if (dev->usb_audio_type == EM28XX_USB_AUDIO_VENDOR) dev->usb_audio_type = EM28XX_USB_AUDIO_NONE; dev->int_audio_type = EM28XX_INT_AUDIO_NONE; goto init_audio; } vid2 = em28xx_read_ac97(dev, AC97_VENDOR_ID2); if (vid2 < 0) goto init_audio; vid = vid1 << 16 | vid2; dev_warn(&dev->intf->dev, "AC97 vendor ID = 0x%08x\n", vid); feat = em28xx_read_ac97(dev, AC97_RESET); if (feat < 0) goto init_audio; dev_warn(&dev->intf->dev, "AC97 features = 0x%04x\n", feat); /* Try to identify what audio processor we have */ if (((vid == 0xffffffff) || (vid == 0x83847650)) && (feat == 0x6a90)) dev->audio_mode.ac97 = EM28XX_AC97_EM202; else if ((vid >> 8) == 0x838476) dev->audio_mode.ac97 = EM28XX_AC97_SIGMATEL; init_audio: /* Reports detected AC97 processor */ switch (dev->audio_mode.ac97) { case EM28XX_NO_AC97: dev_info(&dev->intf->dev, "No AC97 audio processor\n"); break; case EM28XX_AC97_EM202: dev_info(&dev->intf->dev, "Empia 202 AC97 audio processor detected\n"); break; case EM28XX_AC97_SIGMATEL: dev_info(&dev->intf->dev, "Sigmatel audio processor detected (stac 97%02x)\n", vid & 0xff); break; case EM28XX_AC97_OTHER: dev_warn(&dev->intf->dev, "Unknown AC97 audio processor detected!\n"); break; default: break; } return em28xx_audio_analog_set(dev); }

Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab36269.62%637.50%
Frank Schäfer11421.92%637.50%
Devin Heitmueller346.54%212.50%
Gareth Williams81.54%16.25%
Hans Verkuil20.38%16.25%
Total520100.00%16100.00%

EXPORT_SYMBOL_GPL(em28xx_audio_setup);
const struct em28xx_led *em28xx_find_led(struct em28xx *dev, enum em28xx_led_role role) { if (dev->board.leds) { u8 k = 0; while (dev->board.leds[k].role >= 0 && dev->board.leds[k].role < EM28XX_NUM_LED_ROLES) { if (dev->board.leds[k].role == role) return &dev->board.leds[k]; k++; } } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Frank Schäfer94100.00%1100.00%
Total94100.00%1100.00%

EXPORT_SYMBOL_GPL(em28xx_find_led);
int em28xx_capture_start(struct em28xx *dev, int start) { int rc; const struct em28xx_led *led = NULL; if (dev->chip_id == CHIP_ID_EM2874 || dev->chip_id == CHIP_ID_EM2884 || dev->chip_id == CHIP_ID_EM28174 || dev->chip_id == CHIP_ID_EM28178) { /* The Transport Stream Enable Register moved in em2874 */ rc = em28xx_write_reg_bits(dev, EM2874_R5F_TS_ENABLE, start ? EM2874_TS1_CAPTURE_ENABLE : 0x00, EM2874_TS1_CAPTURE_ENABLE); } else { /* FIXME: which is the best order? */ /* video registers are sampled by VREF */ rc = em28xx_write_reg_bits(dev, EM28XX_R0C_USBSUSP, start ? 0x10 : 0x00, 0x10); if (rc < 0) return rc; if (start) { if (dev->board.is_webcam) rc = em28xx_write_reg(dev, 0x13, 0x0c); /* Enable video capture */ rc = em28xx_write_reg(dev, 0x48, 0x00); if (rc < 0) return rc; if (dev->mode == EM28XX_ANALOG_MODE) rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x67); else rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x37); if (rc < 0) return rc; msleep(6); } else { /* disable video capture */ rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x27); } } if (dev->mode == EM28XX_ANALOG_MODE) led = em28xx_find_led(dev, EM28XX_LED_ANALOG_CAPTURING); else led = em28xx_find_led(dev, EM28XX_LED_DIGITAL_CAPTURING); if (led) em28xx_write_reg_bits(dev, led->gpio_reg, (!start ^ led->inverted) ? ~led->gpio_mask : led->gpio_mask, led->gpio_mask); return rc; }

Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab12144.49%753.85%
Frank Schäfer7627.94%215.38%
Andrew Morton3914.34%17.69%
Devin Heitmueller248.82%17.69%
Antti Palosaari124.41%215.38%
Total272100.00%13100.00%


int em28xx_gpio_set(struct em28xx *dev, struct em28xx_reg_seq *gpio) { int rc = 0; if (!gpio) return rc; if (dev->mode != EM28XX_SUSPEND) { em28xx_write_reg(dev, 0x48, 0x00); if (dev->mode == EM28XX_ANALOG_MODE) em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x67); else em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x37); msleep(6); } /* Send GPIO reset sequences specified at board entry */ while (gpio->sleep >= 0) { if (gpio->reg >= 0) { rc = em28xx_write_reg_bits(dev, gpio->reg, gpio->val, gpio->mask); if (rc < 0) return rc; } if (gpio->sleep > 0) msleep(gpio->sleep); gpio++; } return rc; }

Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab11375.84%660.00%
Frank Schäfer1711.41%220.00%
Devin Heitmueller128.05%110.00%
Andrew Morton74.70%110.00%
Total149100.00%10100.00%

EXPORT_SYMBOL_GPL(em28xx_gpio_set);
int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode) { if (dev->mode == set_mode) return 0; if (set_mode == EM28XX_SUSPEND) { dev->mode = set_mode; /* FIXME: add suspend support for ac97 */ return em28xx_gpio_set(dev, dev->board.suspend_gpio); } dev->mode = set_mode; if (dev->mode == EM28XX_DIGITAL_MODE) return em28xx_gpio_set(dev, dev->board.dvb_gpio); else return em28xx_gpio_set(dev, INPUT(dev->ctl_input)->gpio); }

Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab94100.00%3100.00%
Total94100.00%3100.00%

EXPORT_SYMBOL_GPL(em28xx_set_mode); /* ------------------------------------------------------------------ URB control ------------------------------------------------------------------*/ /* * URB completion handler for isoc/bulk transfers */
static void em28xx_irq_callback(struct urb *urb) { struct em28xx *dev = urb->context; int i; switch (urb->status) { case 0: /* success */ case -ETIMEDOUT: /* NAK */ break; case -ECONNRESET: /* kill */ case -ENOENT: case -ESHUTDOWN: return; default: /* error */ em28xx_isocdbg("urb completition error %d.\n", urb->status); break; } /* Copy data from URB */ spin_lock(&dev->slock); dev->usb_ctl.urb_data_copy(dev, urb); spin_unlock(&dev->slock); /* Reset urb buffers */ for (i = 0; i < urb->number_of_packets; i++) { /* isoc only (bulk: number_of_packets = 0) */ urb->iso_frame_desc[i].status = 0; urb->iso_frame_desc[i].actual_length = 0; } urb->status = 0; urb->status = usb_submit_urb(urb, GFP_ATOMIC); if (urb->status) { em28xx_isocdbg("urb resubmit failed (error=%i)\n", urb->status); } }

Contributors

PersonTokensPropCommitsCommitProp
Aidan Thornton12070.59%116.67%
Robert Krakora4425.88%116.67%
Devin Heitmueller31.76%233.33%
Frank Schäfer31.76%233.33%
Total170100.00%6100.00%

/* * Stop and Deallocate URBs */
void em28xx_uninit_usb_xfer(struct em28xx *dev, enum em28xx_mode mode) { struct urb *urb; struct em28xx_usb_bufs *usb_bufs; struct usb_device *udev = interface_to_usbdev(dev->intf); int i; em28xx_isocdbg("em28xx: called em28xx_uninit_usb_xfer in mode %d\n", mode); if (mode == EM28XX_DIGITAL_MODE) usb_bufs = &dev->usb_ctl.digital_bufs; else usb_bufs = &dev->usb_ctl.analog_bufs; for (i = 0; i < usb_bufs->num_bufs; i++) { urb = usb_bufs->urb[i]; if (urb) { if (!irqs_disabled()) usb_kill_urb(urb); else usb_unlink_urb(urb); if (usb_bufs->transfer_buffer[i]) { usb_free_coherent(udev, urb->transfer_buffer_length, usb_bufs->transfer_buffer[i], urb->transfer_dma); } usb_free_urb(urb); usb_bufs->urb[i] = NULL; } usb_bufs->transfer_buffer[i] = NULL; } kfree(usb_bufs->urb); kfree(usb_bufs->transfer_buffer); usb_bufs->urb = NULL; usb_bufs->transfer_buffer = NULL; usb_bufs->num_bufs = 0; em28xx_capture_start(dev, 0); }

Contributors

PersonTokensPropCommitsCommitProp
Aidan Thornton14467.61%112.50%
Gianluca Gennari3014.08%112.50%
Frank Schäfer198.92%337.50%
Mauro Carvalho Chehab125.63%112.50%
Robert Krakora73.29%112.50%
Daniel Mack10.47%112.50%
Total213100.00%8100.00%

EXPORT_SYMBOL_GPL(em28xx_uninit_usb_xfer); /* * Stop URBs */
void em28xx_stop_urbs(struct em28xx *dev) { int i; struct urb *urb; struct em28xx_usb_bufs *isoc_bufs = &dev->usb_ctl.digital_bufs; em28xx_isocdbg("em28xx: called em28xx_stop_urbs\n"); for (i = 0; i < isoc_bufs->num_bufs; i++) { urb = isoc_bufs->urb[i]; if (urb) { if (!irqs_disabled()) usb_kill_urb(urb); else usb_unlink_urb(urb); } } em28xx_capture_start(dev, 0); }

Contributors

PersonTokensPropCommitsCommitProp
Gianluca Gennari8997.80%133.33%
Frank Schäfer22.20%266.67%
Total91100.00%3100.00%

EXPORT_SYMBOL_GPL(em28xx_stop_urbs); /* * Allocate URBs */
int em28xx_alloc_urbs(struct em28xx *dev, enum em28xx_mode mode, int xfer_bulk, int num_bufs, int max_pkt_size, int packet_multiplier) { struct em28xx_usb_bufs *usb_bufs; struct urb *urb; struct usb_device *udev = interface_to_usbdev(dev->intf); int i; int sb_size, pipe; int j, k; em28xx_isocdbg("em28xx: called em28xx_alloc_isoc in mode %d\n", mode); /* Check mode and if we have an endpoint for the selected transfer type, select buffer */ if (mode == EM28XX_DIGITAL_MODE) { if ((xfer_bulk && !dev->dvb_ep_bulk) || (!xfer_bulk && !dev->dvb_ep_isoc)) { dev_err(&dev->intf->dev, "no endpoint for DVB mode and transfer type %d\n", xfer_bulk > 0); return -EINVAL; } usb_bufs = &dev->usb_ctl.digital_bufs; } else if (mode == EM28XX_ANALOG_MODE) { if ((xfer_bulk && !dev->analog_ep_bulk) || (!xfer_bulk && !dev->analog_ep_isoc)) { dev_err(&dev->intf->dev, "no endpoint for analog mode and transfer type %d\n", xfer_bulk > 0); return -EINVAL; } usb_bufs = &dev->usb_ctl.analog_bufs; } else { dev_err(&dev->intf->dev, "invalid mode selected\n"); return -EINVAL; } /* De-allocates all pending stuff */ em28xx_uninit_usb_xfer(dev, mode); usb_bufs->num_bufs = num_bufs; usb_bufs->urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL); if (!usb_bufs->urb) return -ENOMEM; usb_bufs->transfer_buffer = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL); if (!usb_bufs->transfer_buffer) { kfree(usb_bufs->urb); return -ENOMEM; } usb_bufs->max_pkt_size = max_pkt_size; if (xfer_bulk) usb_bufs->num_packets = 0; else usb_bufs->num_packets = packet_multiplier; dev->usb_ctl.vid_buf = NULL; dev->usb_ctl.vbi_buf = NULL; sb_size = packet_multiplier * usb_bufs->max_pkt_size; /* allocate urbs and transfer buffers */ for (i = 0; i < usb_bufs->num_bufs; i++) { urb = usb_alloc_urb(usb_bufs->num_packets, GFP_KERNEL); if (!urb) { em28xx_uninit_usb_xfer(dev, mode); return -ENOMEM; } usb_bufs->urb[i] = urb; usb_bufs->transfer_buffer[i] = usb_alloc_coherent(udev, sb_size, GFP_KERNEL, &urb->transfer_dma); if (!usb_bufs->transfer_buffer[i]) { dev_err(&dev->intf->dev, "unable to allocate %i bytes for transfer buffer %i%s\n", sb_size, i, in_interrupt() ? " while in int" : ""); em28xx_uninit_usb_xfer(dev, mode); return -ENOMEM; } memset(usb_bufs->transfer_buffer[i], 0, sb_size); if (xfer_bulk) { /* bulk */ pipe = usb_rcvbulkpipe(udev, mode == EM28XX_ANALOG_MODE ? dev->analog_ep_bulk : dev->dvb_ep_bulk); usb_fill_bulk_urb(urb, udev, pipe, usb_bufs->transfer_buffer[i], sb_size, em28xx_irq_callback, dev); urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; } else { /* isoc */ pipe = usb_rcvisocpipe(udev, mode == EM28XX_ANALOG_MODE ? dev->analog_ep_isoc : dev->dvb_ep_isoc); usb_fill_int_urb(urb, udev, pipe, usb_bufs->transfer_buffer[i], sb_size, em28xx_irq_callback, dev, 1); urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; k = 0; for (j = 0; j < usb_bufs->num_packets; j++) { urb->iso_frame_desc[j].offset = k; urb->iso_frame_desc[j].length = usb_bufs->max_pkt_size; k += usb_bufs->max_pkt_size; } } urb->number_of_packets = usb_bufs->num_packets; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Aidan Thornton31548.99%15.56%
Frank Schäfer21333.13%633.33%
Mauro Carvalho Chehab528.09%527.78%
Gianluca Gennari497.62%15.56%
Devin Heitmueller121.87%316.67%
Janne Grunau10.16%15.56%
Daniel Mack10.16%15.56%
Total643100.00%18100.00%

EXPORT_SYMBOL_GPL(em28xx_alloc_urbs); /* * Allocate URBs and start IRQ */
int em28xx_init_usb_xfer(struct em28xx *dev, enum em28xx_mode mode, int xfer_bulk, int num_bufs, int max_pkt_size, int packet_multiplier, int (*urb_data_copy)(struct em28xx *dev, struct urb *urb)) { struct em28xx_dmaqueue *dma_q = &dev->vidq; struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq; struct em28xx_usb_bufs *usb_bufs; struct usb_device *udev = interface_to_usbdev(dev->intf); int i; int rc; int alloc; em28xx_isocdbg("em28xx: called em28xx_init_usb_xfer in mode %d\n", mode); dev->usb_ctl.urb_data_copy = urb_data_copy; if (mode == EM28XX_DIGITAL_MODE) { usb_bufs = &dev->usb_ctl.digital_bufs; /* no need to free/alloc usb buffers in digital mode */ alloc = 0; } else { usb_bufs = &dev->usb_ctl.analog_bufs; alloc = 1; } if (alloc) { rc = em28xx_alloc_urbs(dev, mode, xfer_bulk, num_bufs, max_pkt_size, packet_multiplier); if (rc) return rc; } if (xfer_bulk) { rc = usb_clear_halt(udev, usb_bufs->urb[0]->pipe); if (rc < 0) { dev_err(&dev->intf->dev, "failed to clear USB bulk endpoint stall/halt condition (error=%i)\n", rc); em28xx_uninit_usb_xfer(dev, mode); return rc; } } init_waitqueue_head(&dma_q->wq); init_waitqueue_head(&vbi_dma_q->wq); em28xx_capture_start(dev, 1); /* submit urbs and enables IRQ */ for (i = 0; i < usb_bufs->num_bufs; i++) { rc = usb_submit_urb(usb_bufs->urb[i], GFP_ATOMIC); if (rc) { dev_err(&dev->intf->dev, "submit of urb %i failed (error=%i)\n", i, rc); em28xx_uninit_usb_xfer(dev, mode); return rc; } } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Gianluca Gennari13442.41%17.69%
Aidan Thornton7523.73%17.69%
Frank Schäfer7022.15%646.15%
Mauro Carvalho Chehab299.18%430.77%
Devin Heitmueller82.53%17.69%
Total316100.00%13100.00%

EXPORT_SYMBOL_GPL(em28xx_init_usb_xfer); /* * Device control list */ static LIST_HEAD(em28xx_devlist); static DEFINE_MUTEX(em28xx_devlist_mutex); /* * Extension interface */ static LIST_HEAD(em28xx_extension_devlist);
int em28xx_register_extension(struct em28xx_ops *ops) { struct em28xx *dev = NULL; mutex_lock(&em28xx_devlist_mutex); list_add_tail(&ops->next, &em28xx_extension_devlist); list_for_each_entry(dev, &em28xx_devlist, devlist) { ops->init(dev); } mutex_unlock(&em28xx_devlist_mutex); pr_info("em28xx: Registered (%s) extension\n", ops->name); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab6391.30%375.00%
Chris Rankin68.70%125.00%
Total69100.00%4100.00%

EXPORT_SYMBOL(em28xx_register_extension);
void em28xx_unregister_extension(struct em28xx_ops *ops) { struct em28xx *dev = NULL; mutex_lock(&em28xx_devlist_mutex); list_for_each_entry(dev, &em28xx_devlist, devlist) { ops->fini(dev); } list_del(&ops->next); mutex_unlock(&em28xx_devlist_mutex); pr_info("em28xx: Removed (%s) extension\n", ops->name); }

Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab5688.89%375.00%
Chris Rankin711.11%125.00%
Total63100.00%4100.00%

EXPORT_SYMBOL(em28xx_unregister_extension);
void em28xx_init_extension(struct em28xx *dev) { const struct em28xx_ops *ops = NULL; mutex_lock(&em28xx_devlist_mutex); list_add_tail(&dev->devlist, &em28xx_devlist); list_for_each_entry(ops, &em28xx_extension_devlist, next) { if (ops->init) ops->init(dev); } mutex_unlock(&em28xx_devlist_mutex); }

Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab5585.94%266.67%
Chris Rankin914.06%133.33%
Total64100.00%3100.00%


void em28xx_close_extension(struct em28xx *dev) { const struct em28xx_ops *ops = NULL; mutex_lock(&em28xx_devlist_mutex); list_for_each_entry(ops, &em28xx_extension_devlist, next) { if (ops->fini) ops->fini(dev); } list_del(&dev->devlist); mutex_unlock(&em28xx_devlist_mutex); }

Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab5285.25%266.67%
Chris Rankin914.75%133.33%
Total61100.00%3100.00%


int em28xx_suspend_extension(struct em28xx *dev) { const struct em28xx_ops *ops = NULL; dev_info(&dev->intf->dev, "Suspending extensions\n"); mutex_lock(&em28xx_devlist_mutex); list_for_each_entry(ops, &em28xx_extension_devlist, next) { if (ops->suspend) ops->suspend(dev); } mutex_unlock(&em28xx_devlist_mutex); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Shuah Khan5986.76%125.00%
Mauro Carvalho Chehab811.76%250.00%
Russell King11.47%125.00%
Total68100.00%4100.00%


int em28xx_resume_extension(struct em28xx *dev) { const struct em28xx_ops *ops = NULL; dev_info(&dev->intf->dev, "Resuming extensions\n"); mutex_lock(&em28xx_devlist_mutex); list_for_each_entry(ops, &em28xx_extension_devlist, next) { if (ops->resume) ops->resume(dev); } mutex_unlock(&em28xx_devlist_mutex); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Shuah Khan5986.76%125.00%
Mauro Carvalho Chehab811.76%250.00%
Russell King11.47%125.00%
Total68100.00%4100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Mauro Carvalho Chehab244348.59%4742.73%
Frank Schäfer71114.14%2320.91%
Aidan Thornton67313.39%10.91%
Andrew Morton4128.19%21.82%
Gianluca Gennari3146.25%21.82%
Devin Heitmueller1232.45%87.27%
Shuah Khan1182.35%10.91%
Robert Krakora761.51%43.64%
Vitaly Wool380.76%10.91%
Ezequiel García340.68%21.82%
Chris Rankin310.62%32.73%
Antti Palosaari120.24%21.82%
Markus Rechberger90.18%10.91%
Douglas Schilling Landgraf80.16%10.91%
Gareth Williams80.16%10.91%
Tejun Heo30.06%10.91%
Hans Verkuil30.06%21.82%
Sascha Sommer20.04%10.91%
Daniel Mack20.04%10.91%
Adrian Bunk20.04%10.91%
Russell King20.04%10.91%
Nicola Soranzo10.02%10.91%
Michael Ira Krufky10.02%10.91%
Janne Grunau10.02%10.91%
Julia Lawall10.02%10.91%
Total5028100.00%110100.00%
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