diff options
Diffstat (limited to 'drivers/media/IR/ir-nec-decoder.c')
-rw-r--r-- | drivers/media/IR/ir-nec-decoder.c | 151 |
1 files changed, 10 insertions, 141 deletions
diff --git a/drivers/media/IR/ir-nec-decoder.c b/drivers/media/IR/ir-nec-decoder.c index ba79233112e..52e0f378ae3 100644 --- a/drivers/media/IR/ir-nec-decoder.c +++ b/drivers/media/IR/ir-nec-decoder.c @@ -27,10 +27,6 @@ #define NEC_TRAILER_PULSE (1 * NEC_UNIT) #define NEC_TRAILER_SPACE (10 * NEC_UNIT) /* even longer in reality */ -/* Used to register nec_decoder clients */ -static LIST_HEAD(decoder_list); -static DEFINE_SPINLOCK(decoder_lock); - enum nec_state { STATE_INACTIVE, STATE_HEADER_SPACE, @@ -40,84 +36,6 @@ enum nec_state { STATE_TRAILER_SPACE, }; -struct decoder_data { - struct list_head list; - struct ir_input_dev *ir_dev; - int enabled:1; - - /* State machine control */ - enum nec_state state; - u32 nec_bits; - unsigned count; -}; - - -/** - * 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) -{ - 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 = "nec_decoder", - .attrs = decoder_attributes, -}; - /** * ir_nec_decode() - Decode one NEC pulse or space * @input_dev: the struct input_dev descriptor of the device @@ -127,16 +45,12 @@ static struct attribute_group decoder_attribute_group = { */ static int ir_nec_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 nec_dec *data = &ir_dev->raw->nec; u32 scancode; u8 address, not_address, command, not_command; - data = get_decoder_data(ir_dev); - if (!data) - return -EINVAL; - - if (!data->enabled) + if (!(ir_dev->raw->enabled_protocols & IR_TYPE_NEC)) return 0; if (IS_RESET(ev)) { @@ -191,9 +105,9 @@ static int ir_nec_decode(struct input_dev *input_dev, struct ir_raw_event ev) if (ev.pulse) break; - data->nec_bits <<= 1; + data->bits <<= 1; if (eq_margin(ev.duration, NEC_BIT_1_SPACE, NEC_UNIT / 2)) - data->nec_bits |= 1; + data->bits |= 1; else if (!eq_margin(ev.duration, NEC_BIT_0_SPACE, NEC_UNIT / 2)) break; data->count++; @@ -222,14 +136,14 @@ static int ir_nec_decode(struct input_dev *input_dev, struct ir_raw_event ev) if (!geq_margin(ev.duration, NEC_TRAILER_SPACE, NEC_UNIT / 2)) break; - address = bitrev8((data->nec_bits >> 24) & 0xff); - not_address = bitrev8((data->nec_bits >> 16) & 0xff); - command = bitrev8((data->nec_bits >> 8) & 0xff); - not_command = bitrev8((data->nec_bits >> 0) & 0xff); + address = bitrev8((data->bits >> 24) & 0xff); + not_address = bitrev8((data->bits >> 16) & 0xff); + command = bitrev8((data->bits >> 8) & 0xff); + not_command = bitrev8((data->bits >> 0) & 0xff); if ((command ^ not_command) != 0xff) { IR_dprintk(1, "NEC checksum error: received 0x%08x\n", - data->nec_bits); + data->bits); break; } @@ -256,54 +170,9 @@ static int ir_nec_decode(struct input_dev *input_dev, struct ir_raw_event ev) return -EINVAL; } -static int ir_nec_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_nec_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 nec_handler = { + .protocols = IR_TYPE_NEC, .decode = ir_nec_decode, - .raw_register = ir_nec_register, - .raw_unregister = ir_nec_unregister, }; static int __init ir_nec_decode_init(void) |