[media] rc: ir-sharp-decoder: Add encode capability

Add the capability to encode Sharp scancodes as raw events.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/rc/ir-sharp-decoder.c b/drivers/media/rc/ir-sharp-decoder.c
index 317677f..b47e89e 100644 (file)
--- a/drivers/media/rc/ir-sharp-decoder.c
+++ b/drivers/media/rc/ir-sharp-decoder.c
@@ -173,9 +173,59 @@ static int ir_sharp_decode(struct rc_dev *dev, struct ir_raw_event ev)
        return -EINVAL;
 }
 
+static const struct ir_raw_timings_pd ir_sharp_timings = {
+       .header_pulse  = 0,
+       .header_space  = 0,
+       .bit_pulse     = SHARP_BIT_PULSE,
+       .bit_space[0]  = SHARP_BIT_0_PERIOD,
+       .bit_space[1]  = SHARP_BIT_1_PERIOD,
+       .trailer_pulse = SHARP_BIT_PULSE,
+       .trailer_space = SHARP_ECHO_SPACE,
+       .msb_first     = 1,
+};
+
+/**
+ * ir_sharp_encode() - Encode a scancode as a stream of raw events
+ *
+ * @protocol:  protocol to encode
+ * @scancode:  scancode to encode
+ * @events:    array of raw ir events to write into
+ * @max:       maximum size of @events
+ *
+ * Returns:    The number of events written.
+ *             -ENOBUFS if there isn't enough space in the array to fit the
+ *             encoding. In this case all @max events will have been written.
+ */
+static int ir_sharp_encode(enum rc_type protocol, u32 scancode,
+                          struct ir_raw_event *events, unsigned int max)
+{
+       struct ir_raw_event *e = events;
+       int ret;
+       u32 raw;
+
+       raw = (((bitrev8(scancode >> 8) >> 3) << 8) & 0x1f00) |
+               bitrev8(scancode);
+       ret = ir_raw_gen_pd(&e, max, &ir_sharp_timings, SHARP_NBITS,
+                           (raw << 2) | 2);
+       if (ret < 0)
+               return ret;
+
+       max -= ret;
+
+       raw = (((bitrev8(scancode >> 8) >> 3) << 8) & 0x1f00) |
+               bitrev8(~scancode);
+       ret = ir_raw_gen_pd(&e, max, &ir_sharp_timings, SHARP_NBITS,
+                           (raw << 2) | 1);
+       if (ret < 0)
+               return ret;
+
+       return e - events;
+}
+
 static struct ir_raw_handler sharp_handler = {
        .protocols      = RC_BIT_SHARP,
        .decode         = ir_sharp_decode,
+       .encode         = ir_sharp_encode,
 };
 
 static int __init ir_sharp_decode_init(void)