diff options
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-core.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-core.c | 1264 |
1 files changed, 0 insertions, 1264 deletions
diff --git a/drivers/media/video/em28xx/em28xx-core.c b/drivers/media/video/em28xx/em28xx-core.c deleted file mode 100644 index de2cb20..0000000 --- a/drivers/media/video/em28xx/em28xx-core.c +++ /dev/null @@ -1,1264 +0,0 @@ -/* - 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@infradead.org> - Sascha Sommer <saschasommer@freenet.de> - - 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/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 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) - -static int alt; -module_param(alt, int, 0644); -MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint"); - -static unsigned int disable_vbi; -module_param(disable_vbi, int, 0644); -MODULE_PARM_DESC(disable_vbi, "disable vbi support"); - -/* 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->state & 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 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->state & 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 (dev->wait_after_write) - msleep(dev->wait_after_write); - - return ret; -} - -int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len) -{ - int rc; - - rc = em28xx_write_regs_req(dev, USB_REQ_GET_STATUS, reg, buf, len); - - /* Stores GPO/GPIO values at the cache, if changed - Only write values should be stored, since input on a GPIO - register will return the input bits. - Not sure what happens on reading GPO register. - */ - if (rc >= 0) { - if (reg == dev->reg_gpo_num) - dev->reg_gpo = buf[0]; - else if (reg == dev->reg_gpio_num) - dev->reg_gpio = buf[0]; - } - - return rc; -} -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; - - /* Uses cache for gpo/gpio registers */ - if (reg == dev->reg_gpo_num) - oldval = dev->reg_gpo; - else if (reg == dev->reg_gpio_num) - oldval = dev->reg_gpio; - else - 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_is_ac97_ready() - * Checks if ac97 is ready - */ -static int em28xx_is_ac97_ready(struct em28xx *dev) -{ - int ret, i; - - /* Wait up to 50 ms for AC97 command to complete */ - for (i = 0; i < 10; i++, msleep(5)) { - ret = em28xx_read_reg(dev, EM28XX_R43_AC97BUSY); - if (ret < 0) - return ret; - - if (!(ret & 0x01)) - return 0; - } - - 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; - u16 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->audio_mode.has_audio) - 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; - - if (dev->chip_id == CHIP_ID_EM2870 || dev->chip_id == CHIP_ID_EM2874 - || dev->chip_id == CHIP_ID_EM28174) { - /* Digital only device - don't load any alsa module */ - dev->audio_mode.has_audio = false; - dev->has_audio_class = false; - dev->has_alsa_audio = false; - return 0; - } - - dev->audio_mode.has_audio = true; - - /* 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? */ - cfg = EM28XX_CHIPCFG_AC97; /* Be conservative */ - } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) == 0x00) { - /* The device doesn't have vendor audio at all */ - dev->has_alsa_audio = false; - dev->audio_mode.has_audio = false; - return 0; - } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) == - EM28XX_CHIPCFG_I2S_3_SAMPRATES) { - em28xx_info("I2S Audio (3 sample rates)\n"); - dev->audio_mode.i2s_3rates = 1; - } else if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) == - EM28XX_CHIPCFG_I2S_5_SAMPRATES) { - em28xx_info("I2S Audio (5 sample rates)\n"); - dev->audio_mode.i2s_5rates = 1; - } - - if ((cfg & EM28XX_CHIPCFG_AUDIOMASK) != EM28XX_CHIPCFG_AC97) { - /* Skip the code that does AC97 vendor detection */ - dev->audio_mode.ac97 = EM28XX_NO_AC97; - goto init_audio; - } - - 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; - dev->has_alsa_audio = false; - dev->audio_mode.has_audio = false; - goto init_audio; - } - - vid2 = em28xx_read_ac97(dev, AC97_VENDOR_ID2); - if (vid2 < 0) - goto init_audio; - - vid = vid1 << 16 | vid2; - - dev->audio_mode.ac97_vendor_id = vid; - em28xx_warn("AC97 vendor ID = 0x%08x\n", vid); - - feat = em28xx_read_ac97(dev, AC97_RESET); - if (feat < 0) - goto init_audio; - - dev->audio_mode.ac97_feat = feat; - 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", - dev->audio_mode.ac97_vendor_id & 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); - -int em28xx_colorlevels_set_default(struct em28xx *dev) -{ - em28xx_write_reg(dev, EM28XX_R20_YGAIN, 0x10); /* contrast */ - em28xx_write_reg(dev, EM28XX_R21_YOFFSET, 0x00); /* brightness */ - em28xx_write_reg(dev, EM28XX_R22_UVGAIN, 0x10); /* saturation */ - em28xx_write_reg(dev, EM28XX_R23_UOFFSET, 0x00); - em28xx_write_reg(dev, EM28XX_R24_VOFFSET, 0x00); - em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, 0x00); - - em28xx_write_reg(dev, EM28XX_R14_GAMMA, 0x20); - em28xx_write_reg(dev, EM28XX_R15_RGAIN, 0x20); - em28xx_write_reg(dev, EM28XX_R16_GGAIN, 0x20); - em28xx_write_reg(dev, EM28XX_R17_BGAIN, 0x20); - em28xx_write_reg(dev, EM28XX_R18_ROFFSET, 0x00); - em28xx_write_reg(dev, EM28XX_R19_GOFFSET, 0x00); - return em28xx_write_reg(dev, EM28XX_R1A_BOFFSET, 0x00); -} - -int em28xx_capture_start(struct em28xx *dev, int start) -{ - int rc; - - if (dev->chip_id == CHIP_ID_EM2874 || - dev->chip_id == CHIP_ID_EM2884 || - dev->chip_id == CHIP_ID_EM28174) { - /* The Transport Stream Enable Register moved in em2874 */ - if (!start) { - rc = em28xx_write_reg_bits(dev, EM2874_R5F_TS_ENABLE, - 0x00, - EM2874_TS1_CAPTURE_ENABLE); - return rc; - } - - /* Enable Transport Stream */ - rc = em28xx_write_reg_bits(dev, EM2874_R5F_TS_ENABLE, - EM2874_TS1_CAPTURE_ENABLE, - EM2874_TS1_CAPTURE_ENABLE); - return rc; - } - - - /* 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) { - /* disable video capture */ - rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x27); - return rc; - } - - if (dev->board.is_webcam) - rc = em28xx_write_reg(dev, 0x13, 0x0c); - - /* enable video capture */ - rc = em28xx_write_reg(dev, 0x48, 0x00); - - 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); - - msleep(6); - - return rc; -} - -int em28xx_vbi_supported(struct em28xx *dev) -{ - /* Modprobe option to manually disable */ - if (disable_vbi == 1) - return 0; - - if (dev->chip_id == CHIP_ID_EM2860 || - dev->chip_id == CHIP_ID_EM2883) - return 1; - - /* Version of em28xx that does not support VBI */ - return 0; -} - -int em28xx_set_outfmt(struct em28xx *dev) -{ - int ret; - u8 vinctrl; - - ret = em28xx_write_reg_bits(dev, EM28XX_R27_OUTFMT, - dev->format->reg | 0x20, 0xff); - if (ret < 0) - return ret; - - ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, dev->vinmode); - if (ret < 0) - return ret; - - vinctrl = dev->vinctl; - if (em28xx_vbi_supported(dev) == 1) { - vinctrl |= EM28XX_VINCTRL_VBI_RAW; - em28xx_write_reg(dev, EM28XX_R34_VBI_START_H, 0x00); - em28xx_write_reg(dev, EM28XX_R36_VBI_WIDTH, dev->vbi_width/4); - em28xx_write_reg(dev, EM28XX_R37_VBI_HEIGHT, dev->vbi_height); - if (dev->norm & V4L2_STD_525_60) { - /* NTSC */ - em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x09); - } else if (dev->norm & V4L2_STD_625_50) { - /* PAL */ - em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x07); - } - } - - return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, vinctrl); -} - -static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax, - u8 ymin, u8 ymax) -{ - em28xx_coredbg("em28xx Scale: (%d,%d)-(%d,%d)\n", - xmin, ymin, xmax, ymax); - - em28xx_write_regs(dev, EM28XX_R28_XMIN, &xmin, 1); - em28xx_write_regs(dev, EM28XX_R29_XMAX, &xmax, 1); - em28xx_write_regs(dev, EM28XX_R2A_YMIN, &ymin, 1); - return em28xx_write_regs(dev, EM28XX_R2B_YMAX, &ymax, 1); -} - -static int em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart, - u16 width, u16 height) -{ - u8 cwidth = width; - u8 cheight = height; - u8 overflow = (height >> 7 & 0x02) | (width >> 8 & 0x01); - - em28xx_coredbg("em28xx Area Set: (%d,%d)\n", - (width | (overflow & 2) << 7), - (height | (overflow & 1) << 8)); - - em28xx_write_regs(dev, EM28XX_R1C_HSTART, &hstart, 1); - em28xx_write_regs(dev, EM28XX_R1D_VSTART, &vstart, 1); - em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, &cwidth, 1); - em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, &cheight, 1); - return em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1); -} - -static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v) -{ - u8 mode; - /* the em2800 scaler only supports scaling down to 50% */ - - if (dev->board.is_em2800) { - mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00); - } else { - u8 buf[2]; - - buf[0] = h; - buf[1] = h >> 8; - em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2); - - buf[0] = v; - buf[1] = v >> 8; - em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2); - /* it seems that both H and V scalers must be active - to work correctly */ - mode = (h || v) ? 0x30 : 0x00; - } - return em28xx_write_reg_bits(dev, EM28XX_R26_COMPR, mode, 0x30); -} - -/* FIXME: this only function read values from dev */ -int em28xx_resolution_set(struct em28xx *dev) -{ - int width, height; - width = norm_maxw(dev); - height = norm_maxh(dev); - - /* Properly setup VBI */ - dev->vbi_width = 720; - if (dev->norm & V4L2_STD_525_60) - dev->vbi_height = 12; - else - dev->vbi_height = 18; - - if (!dev->progressive) - height >>= norm_maxh(dev); - - em28xx_set_outfmt(dev); - - - em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2); - - /* If we don't set the start position to 2 in VBI mode, we end up - with line 20/21 being YUYV encoded instead of being in 8-bit - greyscale. The core of the issue is that line 21 (and line 23 for - PAL WSS) are inside of active video region, and as a result they - get the pixelformatting associated with that area. So by cropping - it out, we end up with the same format as the rest of the VBI - region */ - if (em28xx_vbi_supported(dev) == 1) - em28xx_capture_area_set(dev, 0, 2, width >> 2, height >> 2); - else - em28xx_capture_area_set(dev, 0, 0, width >> 2, height >> 2); - - return em28xx_scaler_set(dev, dev->hscale, dev->vscale); -} - -int em28xx_set_alternate(struct em28xx *dev) -{ - int errCode, prev_alt = dev->alt; - int i; - unsigned int min_pkt_size = dev->width * 2 + 4; - - /* - * alt = 0 is used only for control messages, so, only values - * greater than 0 can be used for streaming. - */ - if (alt && alt < dev->num_alt) { - em28xx_coredbg("alternate forced to %d\n", dev->alt); - dev->alt = alt; - goto set_alt; - } - - /* When image size is bigger than a certain value, - the frame size should be increased, otherwise, only - green screen will be received. - */ - if (dev->width * 2 * dev->height > 720 * 240 * 2) - min_pkt_size *= 2; - - for (i = 0; i < dev->num_alt; i++) { - /* stop when the selected alt setting offers enough bandwidth */ - if (dev->alt_max_pkt_size[i] >= min_pkt_size) { - dev->alt = i; - break; - /* otherwise make sure that we end up with the maximum bandwidth - because the min_pkt_size equation might be wrong... - */ - } else if (dev->alt_max_pkt_size[i] > - dev->alt_max_pkt_size[dev->alt]) - dev->alt = i; - } - -set_alt: - if (dev->alt != prev_alt) { - em28xx_coredbg("minimum isoc packet size: %u (alt=%d)\n", - min_pkt_size, dev->alt); - dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt]; - em28xx_coredbg("setting alternate %d with wMaxPacketSize=%u\n", - dev->alt, dev->max_pkt_size); - errCode = usb_set_interface(dev->udev, 0, dev->alt); - if (errCode < 0) { - em28xx_errdev("cannot change alternate number to %d (error=%i)\n", - dev->alt, errCode); - return errCode; - } - } - return 0; -} - -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 - ------------------------------------------------------------------*/ - -/* - * IRQ callback, called by URB callback - */ -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->isoc_ctl.isoc_copy(dev, urb); - spin_unlock(&dev->slock); - - /* Reset urb buffers */ - for (i = 0; i < urb->number_of_packets; i++) { - 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_isoc(struct em28xx *dev, enum em28xx_mode mode) -{ - struct urb *urb; - struct em28xx_usb_isoc_bufs *isoc_bufs; - int i; - - em28xx_isocdbg("em28xx: called em28xx_uninit_isoc in mode %d\n", mode); - - if (mode == EM28XX_DIGITAL_MODE) - isoc_bufs = &dev->isoc_ctl.digital_bufs; - else - isoc_bufs = &dev->isoc_ctl.analog_bufs; - - 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); - - if (isoc_bufs->transfer_buffer[i]) { - usb_free_coherent(dev->udev, - urb->transfer_buffer_length, - isoc_bufs->transfer_buffer[i], - urb->transfer_dma); - } - usb_free_urb(urb); - isoc_bufs->urb[i] = NULL; - } - isoc_bufs->transfer_buffer[i] = NULL; - } - - kfree(isoc_bufs->urb); - kfree(isoc_bufs->transfer_buffer); - - isoc_bufs->urb = NULL; - isoc_bufs->transfer_buffer = NULL; - isoc_bufs->num_bufs = 0; - - em28xx_capture_start(dev, 0); -} -EXPORT_SYMBOL_GPL(em28xx_uninit_isoc); - -/* - * Stop URBs - */ -void em28xx_stop_urbs(struct em28xx *dev) -{ - int i; - struct urb *urb; - struct em28xx_usb_isoc_bufs *isoc_bufs = &dev->isoc_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_isoc(struct em28xx *dev, enum em28xx_mode mode, - int max_packets, int num_bufs, int max_pkt_size) -{ - struct em28xx_usb_isoc_bufs *isoc_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); - - if (mode == EM28XX_DIGITAL_MODE) - isoc_bufs = &dev->isoc_ctl.digital_bufs; - else - isoc_bufs = &dev->isoc_ctl.analog_bufs; - - /* De-allocates all pending stuff */ - em28xx_uninit_isoc(dev, mode); - - isoc_bufs->num_bufs = num_bufs; - - isoc_bufs->urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL); - if (!isoc_bufs->urb) { - em28xx_errdev("cannot alloc memory for usb buffers\n"); - return -ENOMEM; - } - - isoc_bufs->transfer_buffer = kzalloc(sizeof(void *)*num_bufs, - GFP_KERNEL); - if (!isoc_bufs->transfer_buffer) { - em28xx_errdev("cannot allocate memory for usb transfer\n"); - kfree(isoc_bufs->urb); - return -ENOMEM; - } - - isoc_bufs->max_pkt_size = max_pkt_size; - isoc_bufs->num_packets = max_packets; - dev->isoc_ctl.vid_buf = NULL; - dev->isoc_ctl.vbi_buf = NULL; - - sb_size = isoc_bufs->num_packets * isoc_bufs->max_pkt_size; - - /* allocate urbs and transfer buffers */ - for (i = 0; i < isoc_bufs->num_bufs; i++) { - urb = usb_alloc_urb(isoc_bufs->num_packets, GFP_KERNEL); - if (!urb) { - em28xx_err("cannot alloc isoc_ctl.urb %i\n", i); - em28xx_uninit_isoc(dev, mode); - return -ENOMEM; - } - isoc_bufs->urb[i] = urb; - - isoc_bufs->transfer_buffer[i] = usb_alloc_coherent(dev->udev, - sb_size, GFP_KERNEL, &urb->transfer_dma); - if (!isoc_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_isoc(dev, mode); - return -ENOMEM; - } - memset(isoc_bufs->transfer_buffer[i], 0, sb_size); - - /* FIXME: this is a hack - should be - 'desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK' - should also be using 'desc.bInterval' - */ - pipe = usb_rcvisocpipe(dev->udev, - mode == EM28XX_ANALOG_MODE ? - EM28XX_EP_ANALOG : EM28XX_EP_DIGITAL); - - usb_fill_int_urb(urb, dev->udev, pipe, - isoc_bufs->transfer_buffer[i], sb_size, - em28xx_irq_callback, dev, 1); - - urb->number_of_packets = isoc_bufs->num_packets; - urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; - - k = 0; - for (j = 0; j < isoc_bufs->num_packets; j++) { - urb->iso_frame_desc[j].offset = k; - urb->iso_frame_desc[j].length = - isoc_bufs->max_pkt_size; - k += isoc_bufs->max_pkt_size; - } - } - - return 0; -} -EXPORT_SYMBOL_GPL(em28xx_alloc_isoc); - -/* - * Allocate URBs and start IRQ - */ -int em28xx_init_isoc(struct em28xx *dev, enum em28xx_mode mode, - int max_packets, int num_bufs, int max_pkt_size, - int (*isoc_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_isoc_bufs *isoc_bufs; - int i; - int rc; - int alloc; - - em28xx_isocdbg("em28xx: called em28xx_init_isoc in mode %d\n", mode); - - dev->isoc_ctl.isoc_copy = isoc_copy; - - if (mode == EM28XX_DIGITAL_MODE) { - isoc_bufs = &dev->isoc_ctl.digital_bufs; - /* no need to free/alloc isoc buffers in digital mode */ - alloc = 0; - } else { - isoc_bufs = &dev->isoc_ctl.analog_bufs; - alloc = 1; - } - - if (alloc) { - rc = em28xx_alloc_isoc(dev, mode, max_packets, - num_bufs, max_pkt_size); - if (rc) - 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 < isoc_bufs->num_bufs; i++) { - rc = usb_submit_urb(isoc_bufs->urb[i], GFP_ATOMIC); - if (rc) { - em28xx_err("submit of urb %i failed (error=%i)\n", i, - rc); - em28xx_uninit_isoc(dev, mode); - return rc; - } - } - - return 0; -} -EXPORT_SYMBOL_GPL(em28xx_init_isoc); - -/* - * em28xx_wake_i2c() - * configure i2c attached devices - */ -void em28xx_wake_i2c(struct em28xx *dev) -{ - v4l2_device_call_all(&dev->v4l2_dev, 0, core, reset, 0); - v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing, - INPUT(dev->ctl_input)->vmux, 0, 0); - v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0); -} - -/* - * 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: Initialized (%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); -} |
