Signed-off-by: Sean Young <s...@mess.org>
---
Documentation/ABI/testing/sysfs-class-rc-redrat3 | 33 ++++
drivers/media/rc/redrat3.c | 200 +++++++++++++++++++++++
2 files changed, 233 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-class-rc-redrat3
diff --git a/Documentation/ABI/testing/sysfs-class-rc-redrat3
b/Documentation/ABI/testing/sysfs-class-rc-redrat3
new file mode 100644
index 0000000..33a24fa
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-rc-redrat3
@@ -0,0 +1,33 @@
+What: /sys/class/rc/rcN/length_fuzz
+Date: Jul 2016
+KernelVersion: 4.8
+Contact: Mauro Carvalho Chehab <m.che...@samsung.com>
+Description:
+ The redrat3 encodes an IR signal as set of different lengths
+ and a set of indices into those lengths. Writing this file
+ sets how much two lengths must differ before they are
+ considered distinct, the value is specified in microseconds.
+ Default 5, value 0 to 127.
+
+What: /sys/class/rc/rcN/min_pause
+Date: Jul 2016
+KernelVersion: 4.8
+Contact: Mauro Carvalho Chehab <m.che...@samsung.com>
+Description:
+ 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.
+
+What: /sys/class/rc/rcN/periods_measure_carrier
+Date: Jul 2016
+KernelVersion: 4.8
+Contact: Mauro Carvalho Chehab <m.che...@samsung.com>
+Description:
+ 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 for applications to reduce this value.
+ Default 8, value 1 to 255.
diff --git a/drivers/media/rc/redrat3.c b/drivers/media/rc/redrat3.c
index 399f44d..8365547 100644
--- a/drivers/media/rc/redrat3.c
+++ b/drivers/media/rc/redrat3.c
@@ -860,6 +860,195 @@ static void redrat3_led_complete(struct urb *urb)
atomic_dec(&rr3->flash);
}
+static ssize_t min_pause_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct rc_dev *rc_dev = to_rc_dev(dev);
+ struct redrat3_dev *rr3 = rc_dev->priv;
+ struct usb_device *udev = rr3->udev;
+ long value;
+ u8 *pause;
+ int rc;
+
+ rc = kstrtol(buf, 0, &value);
+ if (rc)
+ return rc;
+
+ if (value < 2 || value > 30)
+ return -EINVAL;
+
+ pause = kmalloc(sizeof(*pause), GFP_KERNEL);
+ if (!pause)
+ return -ENOMEM;
+
+ *pause = (65536 - (value * 2000)) / 256;
+ rc = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), RR3_SET_IR_PARAM,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
+ RR3_IR_IO_MIN_PAUSE, 0, pause, sizeof(*pause), HZ * 25);
+ dev_dbg(dev, "set ir parm min pause %d rc 0x%02x\n", *pause, rc);
+ if (rc == sizeof(*pause))
+ rc = len;
+
+ kfree(pause);
+
+ return rc;
+}
+
+static ssize_t min_pause_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct rc_dev *rc_dev = to_rc_dev(dev);
+ struct redrat3_dev *rr3 = rc_dev->priv;
+ struct usb_device *udev = rr3->udev;
+ int rc;
+ u8 *pause;
+
+ pause = kmalloc(sizeof(*pause), GFP_KERNEL);
+ if (!pause)
+ return -ENOMEM;
+
+ rc = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), RR3_GET_IR_PARAM,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ RR3_IR_IO_MIN_PAUSE, 0, pause, sizeof(*pause), HZ * 25);
+ dev_dbg(dev, "get ir parm len pause %d rc 0x%02x\n", *pause, rc);
+ if (rc == sizeof(*pause))
+ rc = sprintf(buf, "%d\n", (65536 - 256 * *pause) / 2000);
+
+ kfree(pause);
+
+ return rc;
+}
+
+static ssize_t length_fuzz_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct rc_dev *rc_dev = to_rc_dev(dev);
+ struct redrat3_dev *rr3 = rc_dev->priv;
+ struct usb_device *udev = rr3->udev;
+ long value;
+ u8 *fuzz;
+ int rc;
+
+ rc = kstrtol(buf, 0, &value);
+ if (rc)
+ return rc;
+
+ if (value < 0 || value > 127)
+ return -EINVAL;
+
+ fuzz = kmalloc(sizeof(*fuzz), GFP_KERNEL);
+ if (!fuzz)
+ return -ENOMEM;
+
+ *fuzz = value * 2;
+ rc = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), RR3_SET_IR_PARAM,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
+ RR3_IR_IO_LENGTH_FUZZ, 0, fuzz, sizeof(*fuzz), HZ * 25);
+ dev_dbg(dev, "set ir parm len fuzz %d rc 0x%02x\n", *fuzz, rc);
+ if (rc == sizeof(*fuzz))
+ rc = len;
+
+ kfree(fuzz);
+
+ return rc;
+}
+
+static ssize_t length_fuzz_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct rc_dev *rc_dev = to_rc_dev(dev);
+ struct redrat3_dev *rr3 = rc_dev->priv;
+ struct usb_device *udev = rr3->udev;
+ int rc;
+ u8 *fuzz;
+
+ fuzz = kmalloc(sizeof(*fuzz), GFP_KERNEL);
+ if (!fuzz)
+ return -ENOMEM;
+
+ rc = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), RR3_GET_IR_PARAM,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ RR3_IR_IO_LENGTH_FUZZ, 0, fuzz, sizeof(*fuzz), HZ * 25);
+ dev_dbg(dev, "get ir parm len fuzz %d rc 0x%02x\n", *fuzz, rc);
+ if (rc == sizeof(*fuzz))
+ rc = sprintf(buf, "%d\n", *fuzz / 2);
+
+ kfree(fuzz);
+
+ return rc;
+}
+
+static ssize_t periods_measure_carrier_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct rc_dev *rc_dev = to_rc_dev(dev);
+ struct redrat3_dev *rr3 = rc_dev->priv;
+ struct usb_device *udev = rr3->udev;
+ long value;
+ u8 *periods;
+ int rc;
+
+ rc = kstrtol(buf, 0, &value);
+ if (rc)
+ return rc;
+
+ if (value < 1 || value > 255)
+ return -EINVAL;
+
+ periods = kmalloc(sizeof(*periods), GFP_KERNEL);
+ if (!periods)
+ return -ENOMEM;
+
+ *periods = value;
+ rc = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), RR3_SET_IR_PARAM,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
+ RR3_IR_IO_LENGTH_FUZZ, 0, periods,
+ sizeof(*periods), HZ * 25);
+ dev_dbg(dev, "set ir parm periods to measure carrier %d rc 0x%02x\n",
+ *periods, rc);
+ if (rc == sizeof(*periods))
+ rc = len;
+
+ kfree(periods);
+
+ return rc;
+}
+
+static ssize_t periods_measure_carrier_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct rc_dev *rc_dev = to_rc_dev(dev);
+ struct redrat3_dev *rr3 = rc_dev->priv;
+ struct usb_device *udev = rr3->udev;
+ u8 *periods;
+ int rc;
+
+ periods = kmalloc(sizeof(*periods), GFP_KERNEL);
+ if (!periods)
+ return -ENOMEM;
+
+ rc = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), RR3_GET_IR_PARAM,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ RR3_IR_IO_LENGTH_FUZZ, 0, periods,
+ sizeof(*periods), HZ * 25);
+ dev_dbg(dev, "get ir parm periods to measure carrier %d rc 0x%02x\n",
+ *periods, rc);
+ if (rc == sizeof(*periods))
+ rc = sprintf(buf, "%d\n", *periods);
+
+ kfree(periods);
+
+ return rc;
+}
+
+static struct device_attribute redrat3_attrs[] = {
+ __ATTR_RW(length_fuzz), __ATTR_RW(min_pause),
+ __ATTR_RW(periods_measure_carrier)
+};
+
static struct rc_dev *redrat3_init_rc_dev(struct redrat3_dev *rr3)
{
struct device *dev = rr3->dev;
@@ -1036,6 +1225,13 @@ static int redrat3_dev_probe(struct usb_interface *intf,
retval = -ENOMEM;
goto led_free_error;
}
+ for (i = 0; i < ARRAY_SIZE(redrat3_attrs); i++) {
+ retval = device_create_file(&rr3->rc->dev, &redrat3_attrs[i]);
+ if (retval) {
+ rc_unregister_device(rr3->rc);
+ goto led_free_error;
+ }
+ }
/* we can register the device now, as it is ready */
usb_set_intfdata(intf, rr3);
@@ -1057,10 +1253,14 @@ static void redrat3_dev_disconnect(struct usb_interface
*intf)
{
struct usb_device *udev = interface_to_usbdev(intf);
struct redrat3_dev *rr3 = usb_get_intfdata(intf);
+ int i;
if (!rr3)
return;
+ for (i = 0; i < ARRAY_SIZE(redrat3_attrs); i++)
+ device_remove_file(&rr3->rc->dev, &redrat3_attrs[i]);
+
usb_set_intfdata(intf, NULL);
rc_unregister_device(rr3->rc);
led_classdev_unregister(&rr3->led);
--
2.7.4
--
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