V4L/DVB (13637): em28xx: allow changing keycode table protocol

Experimental patch to allow changing the IR protocol. Currently, it support
changing between RC-5 and NEC protocols.

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

diff --git a/drivers/media/video/em28xx/em28xx-input.c b/drivers/media/video/em28xx/em28xx-input.c
index fbfbab6..ebb75a8 100644 (file)
--- a/drivers/media/video/em28xx/em28xx-input.c
+++ b/drivers/media/video/em28xx/em28xx-input.c
@@ -75,6 +75,10 @@ struct em28xx_IR {
        unsigned int repeat_interval;
 
        int  (*get_key)(struct em28xx_IR *, struct em28xx_ir_poll_result *);
+
+       /* IR device properties */
+
+       struct ir_dev_props props;
 };
 
 /**********************************************************
@@ -336,35 +340,25 @@ static void em28xx_ir_stop(struct em28xx_IR *ir)
        cancel_delayed_work_sync(&ir->work);
 }
 
-int em28xx_ir_init(struct em28xx *dev)
+int em28xx_ir_change_protocol(void *priv, enum ir_type ir_type)
 {
-       struct em28xx_IR *ir;
-       struct input_dev *input_dev;
-       u8 ir_config;
-       int err = -ENOMEM;
-
-       if (dev->board.ir_codes == NULL) {
-               /* No remote control support */
-               return 0;
-       }
-
-       ir = kzalloc(sizeof(*ir), GFP_KERNEL);
-       input_dev = input_allocate_device();
-       if (!ir || !input_dev)
-               goto err_out_free;
-
-       ir->input = input_dev;
-       ir_config = EM2874_IR_RC5;
+       int rc = 0;
+       struct em28xx_IR *ir = priv;
+       struct em28xx *dev = ir->dev;
+       u8 ir_config = EM2874_IR_RC5;
 
        /* Adjust xclk based o IR table for RC5/NEC tables */
-       if (dev->board.ir_codes->ir_type == IR_TYPE_RC5) {
+
+       if (ir_type == IR_TYPE_RC5) {
                dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
                ir->full_code = 1;
-       } else  if (dev->board.ir_codes->ir_type == IR_TYPE_NEC) {
+       } else if (ir_type == IR_TYPE_NEC) {
                dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE;
                ir_config = EM2874_IR_NEC;
                ir->full_code = 1;
-       }
+       } else
+               rc = -EINVAL;
+
        em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk,
                              EM28XX_XCLK_IR_RC5_MODE);
 
@@ -380,9 +374,42 @@ int em28xx_ir_init(struct em28xx *dev)
                break;
        default:
                printk("Unrecognized em28xx chip id: IR not supported\n");
-               goto err_out_free;
+               rc = -EINVAL;
+       }
+
+       return rc;
+}
+
+int em28xx_ir_init(struct em28xx *dev)
+{
+       struct em28xx_IR *ir;
+       struct input_dev *input_dev;
+       int err = -ENOMEM;
+
+       if (dev->board.ir_codes == NULL) {
+               /* No remote control support */
+               return 0;
        }
 
+       ir = kzalloc(sizeof(*ir), GFP_KERNEL);
+       input_dev = input_allocate_device();
+       if (!ir || !input_dev)
+               goto err_out_free;
+
+       /* record handles to ourself */
+       ir->dev = dev;
+       dev->ir = ir;
+
+       ir->input = input_dev;
+
+       /*
+        * em2874 supports more protocols. For now, let's just announce
+        * the two protocols that were already tested
+        */
+       ir->props.allowed_protos = IR_TYPE_RC5 | IR_TYPE_NEC;
+       ir->props.priv = ir;
+       ir->props.change_protocol = em28xx_ir_change_protocol;
+
        /* This is how often we ask the chip for IR information */
        ir->polling = 100; /* ms */
 
@@ -393,6 +420,8 @@ int em28xx_ir_init(struct em28xx *dev)
        usb_make_path(dev->udev, ir->phys, sizeof(ir->phys));
        strlcat(ir->phys, "/input0", sizeof(ir->phys));
 
+       /* Set IR protocol */
+       em28xx_ir_change_protocol(ir, dev->board.ir_codes->ir_type);
        err = ir_input_init(input_dev, &ir->ir, IR_TYPE_OTHER);
        if (err < 0)
                goto err_out_free;
@@ -405,14 +434,13 @@ int em28xx_ir_init(struct em28xx *dev)
        input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
 
        input_dev->dev.parent = &dev->udev->dev;
-       /* record handles to ourself */
-       ir->dev = dev;
-       dev->ir = ir;
+
 
        em28xx_ir_start(ir);
 
        /* all done */
-       err = ir_input_register(ir->input, dev->board.ir_codes, NULL);
+       err = ir_input_register(ir->input, dev->board.ir_codes,
+                               &ir->props);
        if (err)
                goto err_out_stop;