[media] cx88: Add RC logic for Leadtek PVR 2000

Currently, lirc-i2c has a decoding logic for Leadtek Remote
Control. Move it to cx88, as we intend to remove lirc-i2c.

For now, initialize LIRC remote keytable with RC_MAP_EMPTY, as
we don't know its keymap yet. It would be nice to later check
if is there any file on LIRC userspace with that keytable.

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

1 files changed, 48 insertions, 1 deletions

diff --git a/drivers/media/video/cx88/cx88-input.c b/drivers/media/video/cx88/cx88-input.c
index 4a3bf5476c71..06f7d1d00944 100644
--- a/drivers/media/video/cx88/cx88-input.c
+++ b/drivers/media/video/cx88/cx88-input.c
@@ -68,6 +68,9 @@ MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");
 #define ir_dprintk(fmt, arg...) if (ir_debug) \
         printk(KERN_DEBUG "%s IR: " fmt , ir->core->name , ##arg)
 
+#define dprintk(fmt, arg...)    if (ir_debug) \
+        printk(KERN_DEBUG "cx88 IR: " fmt , ##arg)
+
 /* ---------------------------------------------------------------------- */
 
 static void cx88_ir_handle_key(struct cx88_IR *ir)
@@ -527,13 +530,47 @@ void cx88_ir_irq(struct cx88_core *core)
         ir_raw_event_handle(ir->dev);
 }
 
+static int get_key_pvr2000(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
+{
+        int flags, code;
+
+        /* poll IR chip */
+        flags = i2c_smbus_read_byte_data(ir->c, 0x10);
+        if (flags < 0) {
+                dprintk("read error\n");
+                return 0;
+        }
+        /* key pressed ? */
+        if (0 == (flags & 0x80))
+                return 0;
+
+        /* read actual key code */
+        code = i2c_smbus_read_byte_data(ir->c, 0x00);
+        if (code < 0) {
+                dprintk("read error\n");
+                return 0;
+        }
+
+        dprintk("IR Key/Flags: (0x%02x/0x%02x)\n",
+                   code & 0xff, flags & 0xff);
+
+        *ir_key = code & 0xff;
+        *ir_raw = code;
+        return 1;
+}
+
 void cx88_i2c_init_ir(struct cx88_core *core)
 {
         struct i2c_board_info info;
-        const unsigned short addr_list[] = {
+        const unsigned short default_addr_list[] = {
                 0x18, 0x6b, 0x71,
                 I2C_CLIENT_END
         };
+        const unsigned short pvr2000_addr_list[] = {
+                0x18, 0x1a,
+                I2C_CLIENT_END
+        };
+        const unsigned short *addr_list = default_addr_list;
         const unsigned short *addrp;
         /* Instantiate the IR receiver device, if present */
         if (0 != core->i2c_rc)
@@ -542,6 +579,16 @@ void cx88_i2c_init_ir(struct cx88_core *core)
         memset(&info, 0, sizeof(struct i2c_board_info));
         strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
 
+        switch (core->boardnr) {
+        case CX88_BOARD_LEADTEK_PVR2000:
+                addr_list = pvr2000_addr_list;
+                core->init_data.name = "cx88 Leadtek PVR 2000 remote";
+                core->init_data.type = RC_TYPE_UNKNOWN;
+                core->init_data.get_key = get_key_pvr2000;
+                core->init_data.ir_codes = RC_MAP_EMPTY;
+                break;
+        }
+
         /*
          * We can't call i2c_new_probed_device() because it uses
          * quick writes for probing and at least some RC receiver