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path: root/drivers/media/IR/ir-rc6-decoder.c
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Diffstat (limited to 'drivers/media/IR/ir-rc6-decoder.c')
-rw-r--r--drivers/media/IR/ir-rc6-decoder.c153
1 files changed, 7 insertions, 146 deletions
diff --git a/drivers/media/IR/ir-rc6-decoder.c b/drivers/media/IR/ir-rc6-decoder.c
index 2bf479f4f1b..f1624b8279b 100644
--- a/drivers/media/IR/ir-rc6-decoder.c
+++ b/drivers/media/IR/ir-rc6-decoder.c
@@ -36,10 +36,6 @@
#define RC6_STARTBIT_MASK 0x08 /* for the header bits */
#define RC6_6A_MCE_TOGGLE_MASK 0x8000 /* for the body bits */
-/* Used to register rc6_decoder clients */
-static LIST_HEAD(decoder_list);
-static DEFINE_SPINLOCK(decoder_lock);
-
enum rc6_mode {
RC6_MODE_0,
RC6_MODE_6A,
@@ -58,89 +54,8 @@ enum rc6_state {
STATE_FINISHED,
};
-struct decoder_data {
- struct list_head list;
- struct ir_input_dev *ir_dev;
- int enabled:1;
-
- /* State machine control */
- enum rc6_state state;
- u8 header;
- u32 body;
- struct ir_raw_event prev_ev;
- bool toggle;
- unsigned count;
- unsigned wanted_bits;
-};
-
-
-/**
- * get_decoder_data() - gets decoder data
- * @input_dev: input device
- *
- * Returns the struct decoder_data that corresponds to a device
- */
-static struct decoder_data *get_decoder_data(struct ir_input_dev *ir_dev)
-{
- struct decoder_data *data = NULL;
-
- spin_lock(&decoder_lock);
- list_for_each_entry(data, &decoder_list, list) {
- if (data->ir_dev == ir_dev)
- break;
- }
- spin_unlock(&decoder_lock);
- return data;
-}
-
-static ssize_t store_enabled(struct device *d,
- struct device_attribute *mattr,
- const char *buf,
- size_t len)
+static enum rc6_mode rc6_mode(struct rc6_dec *data)
{
- unsigned long value;
- struct ir_input_dev *ir_dev = dev_get_drvdata(d);
- struct decoder_data *data = get_decoder_data(ir_dev);
-
- if (!data)
- return -EINVAL;
-
- if (strict_strtoul(buf, 10, &value) || value > 1)
- return -EINVAL;
-
- data->enabled = value;
-
- return len;
-}
-
-static ssize_t show_enabled(struct device *d,
- struct device_attribute *mattr, char *buf)
-{
- struct ir_input_dev *ir_dev = dev_get_drvdata(d);
- struct decoder_data *data = get_decoder_data(ir_dev);
-
- if (!data)
- return -EINVAL;
-
- if (data->enabled)
- return sprintf(buf, "1\n");
- else
- return sprintf(buf, "0\n");
-}
-
-static DEVICE_ATTR(enabled, S_IRUGO | S_IWUSR, show_enabled, store_enabled);
-
-static struct attribute *decoder_attributes[] = {
- &dev_attr_enabled.attr,
- NULL
-};
-
-static struct attribute_group decoder_attribute_group = {
- .name = "rc6_decoder",
- .attrs = decoder_attributes,
-};
-
-static enum rc6_mode rc6_mode(struct decoder_data *data) {
switch (data->header & RC6_MODE_MASK) {
case 0:
return RC6_MODE_0;
@@ -162,16 +77,12 @@ static enum rc6_mode rc6_mode(struct decoder_data *data) {
*/
static int ir_rc6_decode(struct input_dev *input_dev, struct ir_raw_event ev)
{
- struct decoder_data *data;
struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
+ struct rc6_dec *data = &ir_dev->raw->rc6;
u32 scancode;
u8 toggle;
- data = get_decoder_data(ir_dev);
- if (!data)
- return -EINVAL;
-
- if (!data->enabled)
+ if (!(ir_dev->raw->enabled_protocols & IR_TYPE_RC6))
return 0;
if (IS_RESET(ev)) {
@@ -223,12 +134,11 @@ again:
if (ev.pulse)
data->header |= 1;
data->count++;
- data->prev_ev = ev;
data->state = STATE_HEADER_BIT_END;
return 0;
case STATE_HEADER_BIT_END:
- if (!is_transition(&ev, &data->prev_ev))
+ if (!is_transition(&ev, &ir_dev->raw->prev_ev))
break;
if (data->count == RC6_HEADER_NBITS)
@@ -244,12 +154,11 @@ again:
break;
data->toggle = ev.pulse;
- data->prev_ev = ev;
data->state = STATE_TOGGLE_END;
return 0;
case STATE_TOGGLE_END:
- if (!is_transition(&ev, &data->prev_ev) ||
+ if (!is_transition(&ev, &ir_dev->raw->prev_ev) ||
!geq_margin(ev.duration, RC6_TOGGLE_END, RC6_UNIT / 2))
break;
@@ -259,7 +168,6 @@ again:
}
data->state = STATE_BODY_BIT_START;
- data->prev_ev = ev;
decrease_duration(&ev, RC6_TOGGLE_END);
data->count = 0;
@@ -291,13 +199,11 @@ again:
if (ev.pulse)
data->body |= 1;
data->count++;
- data->prev_ev = ev;
-
data->state = STATE_BODY_BIT_END;
return 0;
case STATE_BODY_BIT_END:
- if (!is_transition(&ev, &data->prev_ev))
+ if (!is_transition(&ev, &ir_dev->raw->prev_ev))
break;
if (data->count == data->wanted_bits)
@@ -348,54 +254,9 @@ out:
return -EINVAL;
}
-static int ir_rc6_register(struct input_dev *input_dev)
-{
- struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
- struct decoder_data *data;
- int rc;
-
- rc = sysfs_create_group(&ir_dev->dev.kobj, &decoder_attribute_group);
- if (rc < 0)
- return rc;
-
- data = kzalloc(sizeof(*data), GFP_KERNEL);
- if (!data) {
- sysfs_remove_group(&ir_dev->dev.kobj, &decoder_attribute_group);
- return -ENOMEM;
- }
-
- data->ir_dev = ir_dev;
- data->enabled = 1;
-
- spin_lock(&decoder_lock);
- list_add_tail(&data->list, &decoder_list);
- spin_unlock(&decoder_lock);
-
- return 0;
-}
-
-static int ir_rc6_unregister(struct input_dev *input_dev)
-{
- struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
- static struct decoder_data *data;
-
- data = get_decoder_data(ir_dev);
- if (!data)
- return 0;
-
- sysfs_remove_group(&ir_dev->dev.kobj, &decoder_attribute_group);
-
- spin_lock(&decoder_lock);
- list_del(&data->list);
- spin_unlock(&decoder_lock);
-
- return 0;
-}
-
static struct ir_raw_handler rc6_handler = {
+ .protocols = IR_TYPE_RC6,
.decode = ir_rc6_decode,
- .raw_register = ir_rc6_register,
- .raw_unregister = ir_rc6_unregister,
};
static int __init ir_rc6_decode_init(void)