Newer em28xx chipsets (em2874 and upper) are capable of supporting
RC6 codes, on both mode 0 (command mode, 16 bits payload size, similar
to RC5, also called "Philips mode") and mode 6a (OEM command mode,
with offers a few alternatives with regards to the payload size).
I don't have any mode 6a control ATM to test it, so, I opted to add
support only to mode 0.
After this patch, adding support to mode 6a should not be hard.
Tested with a Philips television remote controller.
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
---
drivers/media/usb/em28xx/em28xx-input.c | 93 +++++++++++++++++++++++++++------
1 file changed, 76 insertions(+), 17 deletions(-)
diff --git a/drivers/media/usb/em28xx/em28xx-input.c b/drivers/media/usb/em28xx/em28xx-input.c
index 507370c..3899ea8 100644
--- a/drivers/media/usb/em28xx/em28xx-input.c
+++ b/drivers/media/usb/em28xx/em28xx-input.c
@@ -285,6 +285,9 @@ static int em2874_polling_getkey(struct em28xx_IR *ir,
else /* Normal NEC */
poll_result->scancode = msg[1] << 8 | msg[3];
break;
+ case RC_BIT_RC6_0:
+ poll_result->scancode = msg[1] << 8 | msg[2];
+ break;
default:
poll_result->scancode = (msg[1] << 24) | (msg[2] << 16) |
(msg[3] << 8) | msg[4];
@@ -361,15 +364,42 @@ static void em28xx_ir_stop(struct rc_dev *rc)
cancel_delayed_work_sync(&ir->work);
}
-static int em28xx_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type)
+static int em2860_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type)
{
- int rc = 0;
struct em28xx_IR *ir = rc_dev->priv;
struct em28xx *dev = ir->dev;
- u8 ir_config = EM2874_IR_RC5;
- /* Adjust xclk based o IR table for RC5/NEC tables */
+ /* Adjust xclk based on IR table for RC5/NEC tables */
+ if (*rc_type & RC_BIT_RC5) {
+ dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
+ ir->full_code = 1;
+ *rc_type = RC_BIT_RC5;
+ } else if (*rc_type & RC_BIT_NEC) {
+ dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE;
+ ir->full_code = 1;
+ *rc_type = RC_BIT_NEC;
+ } else if (*rc_type & RC_BIT_UNKNOWN) {
+ *rc_type = RC_BIT_UNKNOWN;
+ } else {
+ *rc_type = ir->rc_type;
+ return -EINVAL;
+ }
+ ir->get_key = default_polling_getkey;
+ em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk,
+ EM28XX_XCLK_IR_RC5_MODE);
+
+ ir->rc_type = *rc_type;
+ return 0;
+}
+
+static int em2874_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type)
+{
+ struct em28xx_IR *ir = rc_dev->priv;
+ struct em28xx *dev = ir->dev;
+ u8 ir_config = EM2874_IR_RC5;
+
+ /* Adjust xclk and set type based on IR table for RC5/NEC/RC6 tables */
if (*rc_type & RC_BIT_RC5) {
dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
ir->full_code = 1;
@@ -379,33 +409,47 @@ static int em28xx_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type)
ir_config = EM2874_IR_NEC | EM2874_IR_NEC_NO_PARITY;
ir->full_code = 1;
*rc_type = RC_BIT_NEC;
- } else if (*rc_type != RC_BIT_UNKNOWN)
- rc = -EINVAL;
+ } else if (*rc_type & RC_BIT_RC6_0) {
+ dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
+ ir_config = EM2874_IR_RC6_MODE_0;
+ ir->full_code = 1;
+ *rc_type = RC_BIT_RC6_0;
+ } else if (*rc_type & RC_BIT_UNKNOWN) {
+ *rc_type = RC_BIT_UNKNOWN;
+ } else {
+ *rc_type = ir->rc_type;
+ return -EINVAL;
+ }
- ir->rc_type = *rc_type;
+ ir->get_key = em2874_polling_getkey;
+ em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1);
em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk,
EM28XX_XCLK_IR_RC5_MODE);
+ ir->rc_type = *rc_type;
+
+ return 0;
+}
+static int em28xx_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_type)
+{
+ struct em28xx_IR *ir = rc_dev->priv;
+ struct em28xx *dev = ir->dev;
+
/* Setup the proper handler based on the chip */
switch (dev->chip_id) {
case CHIP_ID_EM2860:
case CHIP_ID_EM2883:
- ir->get_key = default_polling_getkey;
- break;
+ return em2860_ir_change_protocol(rc_dev, rc_type);
case CHIP_ID_EM2884:
case CHIP_ID_EM2874:
case CHIP_ID_EM28174:
- ir->get_key = em2874_polling_getkey;
- em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1);
- break;
+ return em2874_ir_change_protocol(rc_dev, rc_type);
default:
printk("Unrecognized em28xx chip id 0x%02x: IR not supported\n",
dev->chip_id);
- rc = -EINVAL;
+ return -EINVAL;
}
-
- return rc;
}
static void em28xx_register_i2c_ir(struct em28xx *dev)
@@ -573,6 +617,21 @@ static int em28xx_ir_init(struct em28xx *dev)
rc->open = em28xx_ir_start;
rc->close = em28xx_ir_stop;
+ switch (dev->chip_id) {
+ case CHIP_ID_EM2860:
+ case CHIP_ID_EM2883:
+ rc->allowed_protos = RC_BIT_RC5 | RC_BIT_NEC;
+ break;
+ case CHIP_ID_EM2884:
+ case CHIP_ID_EM2874:
+ case CHIP_ID_EM28174:
+ rc->allowed_protos = RC_BIT_RC5 | RC_BIT_NEC | RC_BIT_RC6_0;
+ break;
+ default:
+ err = -ENODEV;
+ goto err_out_free;
+ }
+
/* By default, keep protocol field untouched */
rc_type = RC_BIT_UNKNOWN;
err = em28xx_ir_change_protocol(rc, &rc_type);
@@ -615,9 +674,9 @@ static int em28xx_ir_init(struct em28xx *dev)
return 0;
- err_out_stop:
+err_out_stop:
dev->ir = NULL;
- err_out_free:
+err_out_free:
rc_free_device(rc);
kfree(ir);
return err;
--
1.7.11.7
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