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Commit d6ae162b authored by Sean Young's avatar Sean Young Committed by Mauro Carvalho Chehab
Browse files

[media] redrat3: hardware-specific parameters 



Add these options as module parameters for now; should other drivers
need similar options we could add it to the LIRC api.

Signed-off-by: default avatarSean Young <sean@mess.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent c7470ff2

drivers/media/rc/redrat3.c

+49 −1
Original line number Diff line number Diff line
@@ -124,6 +124,41 @@ 
#define USB_RR3USB_PRODUCT_ID	0x0001

#define USB_RR3IIUSB_PRODUCT_ID	0x0005





/*

 * The redrat3 encodes an IR signal as set of different lengths and a set

 * of indices into those lengths. This sets how much two lengths must

 * differ before they are considered distinct, the value is specified

 * in microseconds.

 * Default 5, value 0 to 127.

 */

static int length_fuzz = 5;

module_param(length_fuzz, uint, 0644);

MODULE_PARM_DESC(length_fuzz, "Length Fuzz (0-127)");



/*

 * When receiving a continuous ir stream (for example when a user is

 * holding a button down on a remote), this specifies the minimum size

 * of a space when the redrat3 sends a irdata packet to the host. Specified

 * in miliseconds. Default value 18ms.

 * The value can be between 2 and 30 inclusive.

 */

static int minimum_pause = 18;

module_param(minimum_pause, uint, 0644);

MODULE_PARM_DESC(minimum_pause, "Minimum Pause in ms (2-30)");



/*

 * The carrier frequency is measured during the first pulse of the IR

 * signal. The larger the number of periods used To measure, the more

 * accurate the result is likely to be, however some signals have short

 * initial pulses, so in some case it may be necessary to reduce this value.

 * Default 8, value 1 to 255.

 */

static int periods_measure_carrier = 8;

module_param(periods_measure_carrier, uint, 0644);

MODULE_PARM_DESC(periods_measure_carrier, "Number of Periods to Measure Carrier (1-255)");





struct redrat3_header {

	__be16 length;

	__be16 transfer_type;
@@ -525,12 +560,25 @@ static void redrat3_reset(struct redrat3_dev *rr3) 
			     RR3_CPUCS_REG_ADDR, 0, val, len, HZ * 25);

	dev_dbg(dev, "reset returned 0x%02x\n", rc);



	*val = 5;

	*val = length_fuzz;

	rc = usb_control_msg(udev, txpipe, RR3_SET_IR_PARAM,

			     USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,

			     RR3_IR_IO_LENGTH_FUZZ, 0, val, len, HZ * 25);

	dev_dbg(dev, "set ir parm len fuzz %d rc 0x%02x\n", *val, rc);



	*val = (65536 - (minimum_pause * 2000)) / 256;

	rc = usb_control_msg(udev, txpipe, RR3_SET_IR_PARAM,

			     USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,

			     RR3_IR_IO_MIN_PAUSE, 0, val, len, HZ * 25);

	dev_dbg(dev, "set ir parm min pause %d rc 0x%02x\n", *val, rc);



	*val = periods_measure_carrier;

	rc = usb_control_msg(udev, txpipe, RR3_SET_IR_PARAM,

			     USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,

			     RR3_IR_IO_PERIODS_MF, 0, val, len, HZ * 25);

	dev_dbg(dev, "set ir parm periods measure carrier %d rc 0x%02x", *val,

									rc);



	*val = RR3_DRIVER_MAXLENS;

	rc = usb_control_msg(udev, txpipe, RR3_SET_IR_PARAM,

			     USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,