| /* |
| 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 <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> |
| |
| #include "em28xx.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]"); |
| |
| #define em28xx_coredbg(fmt, arg...) do {\ |
| if (core_debug) \ |
| printk(KERN_INFO "%s %s :"fmt, \ |
| dev->name, __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) \ |
| printk(KERN_INFO "%s %s :"fmt, \ |
| dev->name, __func__ , ##arg); } while (0) |
| |
| /* FIXME */ |
| #define em28xx_isocdbg(fmt, arg...) do {\ |
| if (core_debug) \ |
| printk(KERN_INFO "%s %s :"fmt, \ |
| dev->name, __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; |
| int pipe = usb_rcvctrlpipe(dev->udev, 0); |
| |
| if (dev->disconnected) |
| return -ENODEV; |
| |
| if (len > URB_MAX_CTRL_SIZE) |
| return -EINVAL; |
| |
| if (reg_debug) { |
| printk(KERN_DEBUG "(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(dev->udev, pipe, req, |
| USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
| 0x0000, reg, dev->urb_buf, len, HZ); |
| if (ret < 0) { |
| if (reg_debug) |
| printk(" failed!\n"); |
| 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); |
| |
| if (reg_debug) { |
| int byte; |
| |
| printk("<<<"); |
| for (byte = 0; byte < len; byte++) |
| printk(" %02x", (unsigned char)buf[byte]); |
| printk("\n"); |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * 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; |
| } |
| |
| int em28xx_read_reg(struct em28xx *dev, u16 reg) |
| { |
| return em28xx_read_reg_req(dev, USB_REQ_GET_STATUS, reg); |
| } |
| 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; |
| int pipe = usb_sndctrlpipe(dev->udev, 0); |
| |
| if (dev->disconnected) |
| return -ENODEV; |
| |
| if ((len < 1) || (len > URB_MAX_CTRL_SIZE)) |
| return -EINVAL; |
| |
| if (reg_debug) { |
| int byte; |
| |
| printk(KERN_DEBUG "(pipe 0x%08x): " |
| "OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>>", |
| pipe, |
| USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
| req, 0, 0, |
| reg & 0xff, reg >> 8, |
| len & 0xff, len >> 8); |
| |
| for (byte = 0; byte < len; byte++) |
| printk(" %02x", (unsigned char)buf[byte]); |
| printk("\n"); |
| } |
| |
| mutex_lock(&dev->ctrl_urb_lock); |
| memcpy(dev->urb_buf, buf, len); |
| ret = usb_control_msg(dev->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; |
| } |
| |
| 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); |
| } |
| 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); |
| } |
| 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); |
| } |
| 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); |
| } |
| 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); |
| } |
| |
| em28xx_warn("AC97 command still being executed: not handled properly!\n"); |
| return -EBUSY; |
| } |
| |
| /* |
| * 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); |
| } |
| 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; |
| } |
| 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) |
| em28xx_warn("couldn't setup AC97 register %d\n", |
| inputs[i].reg); |
| } |
| return 0; |
| } |
| |
| 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; |
| } |
| |
| 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) |
| em28xx_warn("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) |
| em28xx_warn("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; |
| } |
| EXPORT_SYMBOL_GPL(em28xx_audio_analog_set); |
| |
| int em28xx_audio_setup(struct em28xx *dev) |
| { |
| int vid1, vid2, feat, cfg; |
| u32 vid; |
| 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); |
| em28xx_info("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; |
| em28xx_info("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 |
| */ |
| em28xx_warn("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; |
| em28xx_warn("AC97 vendor ID = 0x%08x\n", vid); |
| |
| feat = em28xx_read_ac97(dev, AC97_RESET); |
| if (feat < 0) |
| goto init_audio; |
| |
| em28xx_warn("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: |
| em28xx_info("No AC97 audio processor\n"); |
| break; |
| case EM28XX_AC97_EM202: |
| em28xx_info("Empia 202 AC97 audio processor detected\n"); |
| break; |
| case EM28XX_AC97_SIGMATEL: |
| em28xx_info("Sigmatel audio processor detected (stac 97%02x)\n", |
| vid & 0xff); |
| break; |
| case EM28XX_AC97_OTHER: |
| em28xx_warn("Unknown AC97 audio processor detected!\n"); |
| break; |
| default: |
| break; |
| } |
| |
| return em28xx_audio_analog_set(dev); |
| } |
| 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; |
| } |
| 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; |
| } |
| |
| 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; |
| } |
| 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); |
| } |
| 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); |
| } |
| } |
| |
| /* |
| * 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; |
| 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(dev->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); |
| } |
| 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); |
| } |
| 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; |
| int i; |
| int sb_size, pipe; |
| struct urb *urb; |
| 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)) { |
| em28xx_errdev("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)) { |
| em28xx_errdev("no endpoint for analog mode and transfer type %d\n", |
| xfer_bulk > 0); |
| return -EINVAL; |
| } |
| usb_bufs = &dev->usb_ctl.analog_bufs; |
| } else { |
| em28xx_errdev("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) { |
| em28xx_errdev("cannot alloc memory for usb buffers\n"); |
| return -ENOMEM; |
| } |
| |
| usb_bufs->transfer_buffer = kzalloc(sizeof(void *)*num_bufs, |
| GFP_KERNEL); |
| if (!usb_bufs->transfer_buffer) { |
| em28xx_errdev("cannot allocate memory for usb transfer\n"); |
| 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_err("cannot alloc usb_ctl.urb %i\n", i); |
| em28xx_uninit_usb_xfer(dev, mode); |
| return -ENOMEM; |
| } |
| usb_bufs->urb[i] = urb; |
| |
| usb_bufs->transfer_buffer[i] = usb_alloc_coherent(dev->udev, |
| sb_size, GFP_KERNEL, &urb->transfer_dma); |
| if (!usb_bufs->transfer_buffer[i]) { |
| em28xx_err("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(dev->udev, |
| mode == EM28XX_ANALOG_MODE ? |
| dev->analog_ep_bulk : |
| dev->dvb_ep_bulk); |
| usb_fill_bulk_urb(urb, dev->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(dev->udev, |
| mode == EM28XX_ANALOG_MODE ? |
| dev->analog_ep_isoc : |
| dev->dvb_ep_isoc); |
| usb_fill_int_urb(urb, dev->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; |
| } |
| 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; |
| 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(dev->udev, usb_bufs->urb[0]->pipe); |
| if (rc < 0) { |
| em28xx_err("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) { |
| em28xx_err("submit of urb %i failed (error=%i)\n", i, |
| rc); |
| em28xx_uninit_usb_xfer(dev, mode); |
| return rc; |
| } |
| } |
| |
| return 0; |
| } |
| 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); |
| printk(KERN_INFO "em28xx: Registered (%s) extension\n", ops->name); |
| return 0; |
| } |
| 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); |
| printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name); |
| } |
| 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); |
| } |
| |
| 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); |
| } |
| |
| int em28xx_suspend_extension(struct em28xx *dev) |
| { |
| const struct em28xx_ops *ops = NULL; |
| |
| em28xx_info("Suspending extensions"); |
| 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; |
| } |
| |
| int em28xx_resume_extension(struct em28xx *dev) |
| { |
| const struct em28xx_ops *ops = NULL; |
| |
| em28xx_info("Resuming extensions"); |
| 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; |
| } |