diff options
Diffstat (limited to 'drivers/media/usb/em28xx/em28xx-core.c')
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-core.c | 1179 |
1 files changed, 1179 insertions, 0 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-core.c b/drivers/media/usb/em28xx/em28xx-core.c new file mode 100644 index 000000000..334a82add --- /dev/null +++ b/drivers/media/usb/em28xx/em28xx-core.c @@ -0,0 +1,1179 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// 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@kernel.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. + +#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@kernel.org>, " \ + "Sascha Sommer <saschasommer@freenet.de>" + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL v2"); +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; + + 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, 1000); + if (ret < 0) { + em28xx_regdbg("(pipe 0x%08x): IN: %02x %02x %02x %02x %02x %02x %02x %02x failed with error %i\n", + pipe, + USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + req, 0, 0, + reg & 0xff, reg >> 8, + len & 0xff, len >> 8, ret); + 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 <<< %*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; +} + +/* + * 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; + 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; + + 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, 1000); + mutex_unlock(&dev->ctrl_urb_lock); + + if (ret < 0) { + em28xx_regdbg("(pipe 0x%08x): OUT: %02x %02x %02x %02x %02x %02x %02x %02x >>> %*ph failed with error %i\n", + pipe, + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + req, 0, 0, + reg & 0xff, reg >> 8, + len & 0xff, len >> 8, len, buf, ret); + return usb_translate_errors(ret); + } + + 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); + + 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); + } + + dev_warn(&dev->intf->dev, + "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) + dev_warn(&dev->intf->dev, + "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->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; + usleep_range(10000, 11000); + + 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) + 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; + usleep_range(10000, 11000); + + /* 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; +} +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); +} +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 */ + if (dev->dvb_xfer_bulk) { + /* Max Tx Size = 188 * 256 = 48128 - LCM(188,512) * 2 */ + em28xx_write_reg(dev, (dev->ts == PRIMARY_TS) ? + EM2874_R5D_TS1_PKT_SIZE : + EM2874_R5E_TS2_PKT_SIZE, + 0xff); + } else { + /* ISOC Maximum Transfer Size = 188 * 5 */ + em28xx_write_reg(dev, (dev->ts == PRIMARY_TS) ? + EM2874_R5D_TS1_PKT_SIZE : + EM2874_R5E_TS2_PKT_SIZE, + dev->dvb_max_pkt_size_isoc / 188); + } + if (dev->ts == PRIMARY_TS) + rc = em28xx_write_reg_bits(dev, + EM2874_R5F_TS_ENABLE, + start ? EM2874_TS1_CAPTURE_ENABLE : 0x00, + EM2874_TS1_CAPTURE_ENABLE | EM2874_TS1_FILTER_ENABLE | EM2874_TS1_NULL_DISCARD); + else + rc = em28xx_write_reg_bits(dev, + EM2874_R5F_TS_ENABLE, + start ? EM2874_TS2_CAPTURE_ENABLE : 0x00, + EM2874_TS2_CAPTURE_ENABLE | EM2874_TS2_FILTER_ENABLE | EM2874_TS2_NULL_DISCARD); + } 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->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; + + usleep_range(10000, 11000); + } 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, const 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); + usleep_range(10000, 11000); + } + + /* 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 completion 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("called %s in mode %d\n", __func__, 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); + + usb_free_urb(urb); + usb_bufs->urb[i] = NULL; + } + } + + kfree(usb_bufs->urb); + kfree(usb_bufs->buf); + + usb_bufs->urb = NULL; + usb_bufs->buf = 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("called %s\n", __func__); + + 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; + 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 %s in mode %d\n", __func__, 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 = kcalloc(num_bufs, sizeof(void *), GFP_KERNEL); + if (!usb_bufs->urb) + return -ENOMEM; + + usb_bufs->buf = kcalloc(num_bufs, sizeof(void *), GFP_KERNEL); + if (!usb_bufs->buf) { + 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->buf[i] = kzalloc(sb_size, GFP_KERNEL); + if (!usb_bufs->buf[i]) { + for (i--; i >= 0; i--) + kfree(usb_bufs->buf[i]); + + em28xx_uninit_usb_xfer(dev, mode); + return -ENOMEM; + } + + urb->transfer_flags = URB_FREE_BUFFER; + + 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->buf[i], + sb_size, em28xx_irq_callback, dev); + } 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->buf[i], + sb_size, em28xx_irq_callback, dev, 1); + urb->transfer_flags |= URB_ISO_ASAP; + 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; + struct usb_device *udev = interface_to_usbdev(dev->intf); + int i; + int rc; + int alloc; + + em28xx_isocdbg("em28xx: called %s in mode %d\n", __func__, 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_KERNEL); + 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; +} +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) { + if (ops->init) { + ops->init(dev); + if (dev->dev_next) + ops->init(dev->dev_next); + } + } + mutex_unlock(&em28xx_devlist_mutex); + pr_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) { + if (ops->fini) { + if (dev->dev_next) + ops->fini(dev->dev_next); + ops->fini(dev); + } + } + list_del(&ops->next); + mutex_unlock(&em28xx_devlist_mutex); + pr_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); + if (dev->dev_next) + ops->init(dev->dev_next); + } + } + 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) { + if (dev->dev_next) + ops->fini(dev->dev_next); + 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; + + 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) + continue; + ops->suspend(dev); + if (dev->dev_next) + ops->suspend(dev->dev_next); + } + mutex_unlock(&em28xx_devlist_mutex); + return 0; +} + +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) + continue; + ops->resume(dev); + if (dev->dev_next) + ops->resume(dev->dev_next); + } + mutex_unlock(&em28xx_devlist_mutex); + return 0; +} |