V4L/DVB (9607): em28xx: Properly implement poll support for IR's

The first em28xx were based on i2c IR's. However, some newer designs
are coming with a polling-based IR. Those are done by reading a register
set at em28xx.

This patch adds core polling support for those devices. Later patches will
add support for some device-specific IR's.

This patch adds the same basic IR polling code used by bttv, cx88 and saa7134, and
shares the common getkey masks defined at ir-common.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/media/video/em28xx/em28xx-reg.h b/drivers/media/video/em28xx/em28xx-reg.h
index 50d1790d84fc..f67955a1b818 100644
--- a/drivers/media/video/em28xx/em28xx-reg.h
+++ b/drivers/media/video/em28xx/em28xx-reg.h
@@ -71,6 +71,13 @@
 #define EM28XX_R42_AC97ADDR     0x42
 #define EM28XX_R43_AC97BUSY     0x43
 
+#define EM28XX_R45_IR           0x45
+        /* 0x45  bit 7    - parity bit
+                 bits 6-0 - count
+           0x46  IR brand
+           0x47  IR data
+         */
+
 /* em202 registers */
 #define EM28XX_R02_MASTER_AC97  0x02
 #define EM28XX_R10_LINE_IN_AC97    0x10