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[media] redrat3: hardware-specific parameters

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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: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Sean Young 2016-07-20 14:03:50 -03:00 committed by Mauro Carvalho Chehab
parent c7470ff210
commit d6ae162bd1
1 changed files with 49 additions and 1 deletions
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50
drivers/media/rc/redrat3.c
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@ -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,