HID: Support 171 byte variant of Samsung USB IR receiver

Extends the existing Samsung USB IrDA (0419:0001) quirk with newly reported 171
byte variant. It needs the same quirk as the other devices already supported
by hid-samsung (wrong logical range)

Refactors duplicate trace call into local helper function.

The original bug report for the new variant is available at the second half of
this ticket page:

  https://bugs.launchpad.net/bugs/326986

Signed-off-by: Robert Schedel <r.schedel@yahoo.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-samsung.c b/drivers/hid/hid-samsung.c
index 5b222ee..510dd13 100644 (file)
--- a/drivers/hid/hid-samsung.c
+++ b/drivers/hid/hid-samsung.c
@@ -39,7 +39,17 @@
  *
  * 3. 135 byte report descriptor
  * Report #4 has an array field with logical range 0..17 instead of 1..14.
+ *
+ * 4. 171 byte report descriptor
+ * Report #3 has an array field with logical range 0..1 instead of 1..3.
  */
+static inline void samsung_dev_trace(struct hid_device *hdev,
+               unsigned int rsize)
+{
+       dev_info(&hdev->dev, "fixing up Samsung IrDA %d byte report "
+                       "descriptor\n", rsize);
+}
+
 static void samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc,
                unsigned int rsize)
 {
@@ -47,8 +57,7 @@ static void samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc,
                        rdesc[177] == 0x75 && rdesc[178] == 0x30 &&
                        rdesc[179] == 0x95 && rdesc[180] == 0x01 &&
                        rdesc[182] == 0x40) {
-               dev_info(&hdev->dev, "fixing up Samsung IrDA %d byte report "
-                               "descriptor\n", 184);
+               samsung_dev_trace(hdev, 184);
                rdesc[176] = 0xff;
                rdesc[178] = 0x08;
                rdesc[180] = 0x06;
@@ -56,17 +65,21 @@ static void samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc,
        } else
        if (rsize == 203 && rdesc[192] == 0x15 && rdesc[193] == 0x0 &&
                        rdesc[194] == 0x25 && rdesc[195] == 0x12) {
-               dev_info(&hdev->dev, "fixing up Samsung IrDA %d byte report "
-                               "descriptor\n", 203);
+               samsung_dev_trace(hdev, 203);
                rdesc[193] = 0x1;
                rdesc[195] = 0xf;
        } else
        if (rsize == 135 && rdesc[124] == 0x15 && rdesc[125] == 0x0 &&
                        rdesc[126] == 0x25 && rdesc[127] == 0x11) {
-               dev_info(&hdev->dev, "fixing up Samsung IrDA %d byte report "
-                               "descriptor\n", 135);
+               samsung_dev_trace(hdev, 135);
                rdesc[125] = 0x1;
                rdesc[127] = 0xe;
+       } else
+       if (rsize == 171 && rdesc[160] == 0x15 && rdesc[161] == 0x0 &&
+                       rdesc[162] == 0x25 && rdesc[163] == 0x01) {
+               samsung_dev_trace(hdev, 171);
+               rdesc[161] = 0x1;
+               rdesc[163] = 0x3;
        }
 }