V4L/DVB (8123): Add support for em2860 based PointNix Intra-Oral Camera

em28xx-cards.c
em28xx-input.c
em28xx-video.c
em28xx.h
 - Add support for the PointNix Intra-Oral Camera, which required addition of
   a construct for reading the "snapshot" button (provided on the em2860 and
   em2880 chips, but this is the first case where I have seen it actually used
   in a product). The button is wired to pin 56 on the em2880.

   http://www.pointnix.com/ENG/dental/product_02.asp

   Thanks to Roberto Mantovani <rmantovani@libero.it> for testing the changes

Signed-off-by: Devin Heitmueller <devin.heitmueller@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/media/video/em28xx/em28xx.h b/drivers/media/video/em28xx/em28xx.h
index cff618b2d13c..89842c5d64a1 100644
--- a/drivers/media/video/em28xx/em28xx.h
+++ b/drivers/media/video/em28xx/em28xx.h
@@ -57,6 +57,7 @@
 #define EM2880_BOARD_HAUPPAUGE_WINTV_HVR_950    16
 #define EM2880_BOARD_PINNACLE_PCTV_HD_PRO       17
 #define EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2 18
+#define EM2860_BOARD_POINTNIX_INTRAORAL_CAMERA  19
 
 /* Limits minimum and default number of buffers */
 #define EM28XX_MIN_BUF 4
@@ -249,6 +250,7 @@ struct em28xx_board {
         unsigned int has_12mhz_i2s:1;
         unsigned int max_range_640_480:1;
         unsigned int has_dvb:1;
+        unsigned int has_snapshot_button:1;
 
         enum em28xx_decoder decoder;
 
@@ -328,6 +330,7 @@ struct em28xx {
         unsigned int has_12mhz_i2s:1;
         unsigned int max_range_640_480:1;
         unsigned int has_dvb:1;
+        unsigned int has_snapshot_button:1;
 
         /* Some older em28xx chips needs a waiting time after writing */
         unsigned int wait_after_write;
@@ -418,6 +421,11 @@ struct em28xx {
         /* Caches GPO and GPIO registers */
         unsigned char   reg_gpo, reg_gpio;
 
+        /* Snapshot button */
+        char snapshot_button_path[30];  /* path of the input dev */
+        struct input_dev *sbutton_input_dev;
+        struct delayed_work sbutton_query_work;
+
         struct em28xx_dvb *dvb;
 };
 
@@ -483,6 +491,8 @@ int em28xx_get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw);
 int em28xx_get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw);
 int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c *ir, u32 *ir_key,
                                      u32 *ir_raw);
+void em28xx_register_snapshot_button(struct em28xx *dev);
+void em28xx_deregister_snapshot_button(struct em28xx *dev);
 
 /* printk macros */