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[media] gspca-pac207: Add a led_invert module parameter 

Some cams have their led connected in such a way that on = off and visa versa
unfortunately we cannot tell this from the driver in any way, so add a module
parameter for this.

Reported-by: Yuri Glushkov <yglushkov@yahoo.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans de Goede 2012-11-29 06:39:49 -03:00 committed by Mauro Carvalho Chehab
parent 0488112734
commit 143dd34597
1 changed files with 26 additions and 6 deletions
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32
drivers/media/usb/gspca/pac207.c
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@ -55,6 +55,11 @@ MODULE_LICENSE("GPL");
#define PAC207_AUTOGAIN_DEADZONE 30
/* global parameters */
static int led_invert;
module_param(led_invert, int, 0644);
MODULE_PARM_DESC(led_invert, "Invert led");
/* specific webcam descriptor */
struct sd {
struct gspca_dev gspca_dev; /* !! must be the first item */
@ -187,10 +192,14 @@ static int sd_config(struct gspca_dev *gspca_dev,
/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
pac207_write_reg(gspca_dev, 0x41, 0x00);
/* Bit_0=Image Format,
* Bit_1=LED,
* Bit_2=Compression test mode enable */
u8 mode;
/* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */
if (led_invert)
mode = 0x02;
else
mode = 0x00;
pac207_write_reg(gspca_dev, 0x41, mode);
pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */
return gspca_dev->usb_err;
@ -303,7 +312,11 @@ static int sd_start(struct gspca_dev *gspca_dev)
pac207_write_reg(gspca_dev, 0x02,
v4l2_ctrl_g_ctrl(gspca_dev->exposure)); /* PXCK = 12MHz /n */
mode = 0x02; /* Image Format (Bit 0), LED (1), Compr. test mode (2) */
/* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */
if (led_invert)
mode = 0x00;
else
mode = 0x02;
if (gspca_dev->width == 176) { /* 176x144 */
mode |= 0x01;
PDEBUG(D_STREAM, "pac207_start mode 176x144");
@ -325,8 +338,15 @@ static int sd_start(struct gspca_dev *gspca_dev)
static void sd_stopN(struct gspca_dev *gspca_dev)
{
u8 mode;
/* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */
if (led_invert)
mode = 0x02;
else
mode = 0x00;
pac207_write_reg(gspca_dev, 0x40, 0x00); /* Stop ISO pipe */
pac207_write_reg(gspca_dev, 0x41, 0x00); /* Turn of LED */
pac207_write_reg(gspca_dev, 0x41, mode); /* Turn off LED */
pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */
}