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authorSean Young <sean@mess.org>2016-07-20 20:03:50 +0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2016-09-22 18:46:12 +0300
commitd6ae162bd13998a6511e5efbc7c19ab542ba1555 (patch)
tree2179637c02cf2a8e01d8a890140991ff73d88e3b /drivers/media
parentc7470ff210521e4ca2f4c5217b0d3405528a9b40 (diff)
downloadlinux-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.c50
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,