V4L/DVB (4670): Allow RC5 codes 64 - 127 in ir-kbd-i2c.c

The RC5 coding has for a long time supported commands 64-127 in addition
to 0-63.  This is controlled by the second bit of the RC5 packet (see
The attached patch modifies ir-kbd-i2c.c to allow for commands 64-127,
tested with a PVR350 card in combination with a programmable remote.

Signed-off-by: David Hardeman <david@hardeman.nu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 14 insertions, 5 deletions

diff --git a/drivers/media/video/ir-kbd-i2c.c b/drivers/media/video/ir-kbd-i2c.c
index fba30a40e9c6..1457b1602221 100644
--- a/drivers/media/video/ir-kbd-i2c.c
+++ b/drivers/media/video/ir-kbd-i2c.c
@@ -64,23 +64,32 @@ MODULE_PARM_DESC(hauppauge, "Specify Hauppauge remote: 0=black, 1=grey (defaults
 static int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
 {
         unsigned char buf[3];
-        int start, toggle, dev, code;
+        int start, range, toggle, dev, code;
 
         /* poll IR chip */
         if (3 != i2c_master_recv(&ir->c,buf,3))
                 return -EIO;
 
         /* split rc5 data block ... */
-        start  = (buf[0] >> 6) &    3;
+        start  = (buf[0] >> 7) &    1;
+        range  = (buf[0] >> 6) &    1;
         toggle = (buf[0] >> 5) &    1;
         dev    =  buf[0]       & 0x1f;
         code   = (buf[1] >> 2) & 0x3f;
 
-        if (3 != start)
+        /* rc5 has two start bits
+         * the first bit must be one
+         * the second bit defines the command range (1 = 0-63, 0 = 64 - 127)
+         */
+        if (!start)
                 /* no key pressed */
                 return 0;
-        dprintk(1,"ir hauppauge (rc5): s%d t%d dev=%d code=%d\n",
-                start, toggle, dev, code);
+
+        if (!range)
+                code += 64;
+
+        dprintk(1,"ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n",
+                start, range, toggle, dev, code);
 
         /* return key */
         *ir_key = code;