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Diffstat (limited to 'drivers/media/video/saa7134/saa7134-input.c')
-rw-r--r--drivers/media/video/saa7134/saa7134-input.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/drivers/media/video/saa7134/saa7134-input.c b/drivers/media/video/saa7134/saa7134-input.c
index e6217fe13339..ad08d13dffdd 100644
--- a/drivers/media/video/saa7134/saa7134-input.c
+++ b/drivers/media/video/saa7134/saa7134-input.c
@@ -198,6 +198,84 @@ static int get_key_beholdm6xx(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
return 1;
}
+/* Common (grey or coloured) pinnacle PCTV remote handling
+ *
+ */
+static int get_key_pinnacle(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw,
+ int parity_offset, int marker, int code_modulo)
+{
+ unsigned char b[4];
+ unsigned int start = 0,parity = 0,code = 0;
+
+ /* poll IR chip */
+ if (4 != i2c_master_recv(&ir->c, b, 4)) {
+ i2cdprintk("read error\n");
+ return -EIO;
+ }
+
+ for (start = 0; start < ARRAY_SIZE(b); start++) {
+ if (b[start] == marker) {
+ code=b[(start+parity_offset + 1) % 4];
+ parity=b[(start+parity_offset) % 4];
+ }
+ }
+
+ /* Empty Request */
+ if (parity == 0)
+ return 0;
+
+ /* Repeating... */
+ if (ir->old == parity)
+ return 0;
+
+ ir->old = parity;
+
+ /* drop special codes when a key is held down a long time for the grey controller
+ In this case, the second bit of the code is asserted */
+ if (marker == 0xfe && (code & 0x40))
+ return 0;
+
+ code %= code_modulo;
+
+ *ir_raw = code;
+ *ir_key = code;
+
+ i2cdprintk("Pinnacle PCTV key %02x\n", code);
+
+ return 1;
+}
+
+/* The grey pinnacle PCTV remote
+ *
+ * There are one issue with this remote:
+ * - I2c packet does not change when the same key is pressed quickly. The workaround
+ * is to hold down each key for about half a second, so that another code is generated
+ * in the i2c packet, and the function can distinguish key presses.
+ *
+ * Sylvain Pasche <sylvain.pasche@gmail.com>
+ */
+static int get_key_pinnacle_grey(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
+{
+
+ return get_key_pinnacle(ir, ir_key, ir_raw, 1, 0xfe, 0xff);
+}
+
+
+/* The new pinnacle PCTV remote (with the colored buttons)
+ *
+ * Ricardo Cerqueira <v4l@cerqueira.org>
+ */
+static int get_key_pinnacle_color(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
+{
+ /* code_modulo parameter (0x88) is used to reduce code value to fit inside IR_KEYTAB_SIZE
+ *
+ * this is the only value that results in 42 unique
+ * codes < 128
+ */
+
+ return get_key_pinnacle(ir, ir_key, ir_raw, 2, 0x80, 0x88);
+}
+
void saa7134_input_irq(struct saa7134_dev *dev)
{
struct card_ir *ir = dev->remote;