diff options
Diffstat (limited to 'drivers/media/IR/ir-rc5-decoder.c')
| -rw-r--r-- | drivers/media/IR/ir-rc5-decoder.c | 167 |
1 files changed, 16 insertions, 151 deletions
diff --git a/drivers/media/IR/ir-rc5-decoder.c b/drivers/media/IR/ir-rc5-decoder.c index 23cdb1b1a3b..df4770d978a 100644 --- a/drivers/media/IR/ir-rc5-decoder.c +++ b/drivers/media/IR/ir-rc5-decoder.c @@ -30,10 +30,6 @@ #define RC5_BIT_END (1 * RC5_UNIT) #define RC5X_SPACE (4 * RC5_UNIT) -/* Used to register rc5_decoder clients */ -static LIST_HEAD(decoder_list); -static DEFINE_SPINLOCK(decoder_lock); - enum rc5_state { STATE_INACTIVE, STATE_BIT_START, @@ -42,87 +38,6 @@ enum rc5_state { STATE_FINISHED, }; -struct decoder_data { - struct list_head list; - struct ir_input_dev *ir_dev; - int enabled:1; - - /* State machine control */ - enum rc5_state state; - u32 rc5_bits; - struct ir_raw_event prev_ev; - 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) -{ - 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 = "rc5_decoder", - .attrs = decoder_attributes, -}; - /** * ir_rc5_decode() - Decode one RC-5 pulse or space * @input_dev: the struct input_dev descriptor of the device @@ -132,17 +47,13 @@ static struct attribute_group decoder_attribute_group = { */ static int ir_rc5_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 rc5_dec *data = &ir_dev->raw->rc5; u8 toggle; u32 scancode; - data = get_decoder_data(ir_dev); - if (!data) - return -EINVAL; - - if (!data->enabled) - return 0; + if (!(ir_dev->raw->enabled_protocols & IR_TYPE_RC5)) + return 0; if (IS_RESET(ev)) { data->state = STATE_INACTIVE; @@ -176,16 +87,15 @@ again: if (!eq_margin(ev.duration, RC5_BIT_START, RC5_UNIT / 2)) break; - data->rc5_bits <<= 1; + data->bits <<= 1; if (!ev.pulse) - data->rc5_bits |= 1; + data->bits |= 1; data->count++; - data->prev_ev = ev; data->state = STATE_BIT_END; return 0; case STATE_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) @@ -217,11 +127,11 @@ again: if (data->wanted_bits == RC5X_NBITS) { /* RC5X */ u8 xdata, command, system; - xdata = (data->rc5_bits & 0x0003F) >> 0; - command = (data->rc5_bits & 0x00FC0) >> 6; - system = (data->rc5_bits & 0x1F000) >> 12; - toggle = (data->rc5_bits & 0x20000) ? 1 : 0; - command += (data->rc5_bits & 0x01000) ? 0 : 0x40; + xdata = (data->bits & 0x0003F) >> 0; + command = (data->bits & 0x00FC0) >> 6; + system = (data->bits & 0x1F000) >> 12; + toggle = (data->bits & 0x20000) ? 1 : 0; + command += (data->bits & 0x01000) ? 0 : 0x40; scancode = system << 16 | command << 8 | xdata; IR_dprintk(1, "RC5X scancode 0x%06x (toggle: %u)\n", @@ -230,10 +140,10 @@ again: } else { /* RC5 */ u8 command, system; - command = (data->rc5_bits & 0x0003F) >> 0; - system = (data->rc5_bits & 0x007C0) >> 6; - toggle = (data->rc5_bits & 0x00800) ? 1 : 0; - command += (data->rc5_bits & 0x01000) ? 0 : 0x40; + command = (data->bits & 0x0003F) >> 0; + system = (data->bits & 0x007C0) >> 6; + toggle = (data->bits & 0x00800) ? 1 : 0; + command += (data->bits & 0x01000) ? 0 : 0x40; scancode = system << 8 | command; IR_dprintk(1, "RC5 scancode 0x%04x (toggle: %u)\n", @@ -252,54 +162,9 @@ out: return -EINVAL; } -static int ir_rc5_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_rc5_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 rc5_handler = { + .protocols = IR_TYPE_RC5, .decode = ir_rc5_decode, - .raw_register = ir_rc5_register, - .raw_unregister = ir_rc5_unregister, }; static int __init ir_rc5_decode_init(void) |