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[media] em28xx: add support for GPO controlled analog capturing LEDs

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Some devices are equipped with a capturing status LED that needs to be
switched on/off explicitly via a GPO port.

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Frank Schaefer 2013-12-01 18:06:51 -03:00 committed by Mauro Carvalho Chehab
parent 7b2f25c0b0
commit 07e4de3004
2 changed files with 46 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

69
drivers/media/usb/em28xx/em28xx-core.c
View File

@ -608,47 +608,52 @@ int em28xx_capture_start(struct em28xx *dev, int start)
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,
start ?
EM2874_TS1_CAPTURE_ENABLE : 0x00,
EM2874_TS1_CAPTURE_ENABLE);
return rc;
} 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 (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);
} else {
/* disable video capture */
rc = em28xx_write_reg(dev, EM28XX_R12_VINENABLE, 0x27);
}
}
/* 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;
/* Switch (explicitly controlled) analog capturing LED on/off */
if ((dev->mode == EM28XX_ANALOG_MODE)
&& dev->board.analog_capturing_led) {
struct em28xx_led *led = dev->board.analog_capturing_led;
em28xx_write_reg_bits(dev, led->gpio_reg,
(!start ^ led->inverted) ?
~led->gpio_mask : led->gpio_mask,
led->gpio_mask);
}
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;
}

9
drivers/media/usb/em28xx/em28xx.h
View File

@ -374,6 +374,12 @@ enum em28xx_adecoder {
EM28XX_TVAUDIO,
};
struct em28xx_led {
u8 gpio_reg;
u8 gpio_mask;
bool inverted;
};
struct em28xx_board {
char *name;
int vchannels;
@ -410,6 +416,9 @@ struct em28xx_board {
struct em28xx_input input[MAX_EM28XX_INPUT];
struct em28xx_input radio;
char *ir_codes;
/* LEDs that need to be controlled explicitly */
struct em28xx_led *analog_capturing_led;
};
struct em28xx_eeprom {