diff options
| author | Sean Young <sean@mess.org> | 2016-07-20 20:03:50 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-09-22 18:46:12 +0300 |
| commit | d6ae162bd13998a6511e5efbc7c19ab542ba1555 (patch) | |
| tree | 2179637c02cf2a8e01d8a890140991ff73d88e3b /drivers/media | |
| parent | c7470ff210521e4ca2f4c5217b0d3405528a9b40 (diff) | |
| download | linux-d6ae162bd13998a6511e5efbc7c19ab542ba1555.tar.xz | |
[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: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/rc/redrat3.c | 50 |
1 files changed, 49 insertions, 1 deletions
diff --git a/drivers/media/rc/redrat3.c b/drivers/media/rc/redrat3.c index f4fae0934eca..05ba47bc0b61 100644 --- a/drivers/media/rc/redrat3.c +++ b/drivers/media/rc/redrat3.c @@ -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, |