From 950b0f5a0bf764663a6aa4397d105ad571c64a83 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Mon, 14 Dec 2009 02:54:22 -0300 Subject: [PATCH] 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 --- drivers/media/video/em28xx/em28xx-input.c | 80 +++++++++++++++++++++---------- 1 file changed, 54 insertions(+), 26 deletions(-) diff --git a/drivers/media/video/em28xx/em28xx-input.c b/drivers/media/video/em28xx/em28xx-input.c index fbfbab6..ebb75a8 100644 --- 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; -- 2.7.4