diff options
| -rw-r--r-- | drivers/media/IR/ir-nec-decoder.c | 247 | ||||
| -rw-r--r-- | drivers/media/IR/ir-raw-event.c | 143 | ||||
| -rw-r--r-- | drivers/media/IR/ir-rc5-decoder.c | 150 | ||||
| -rw-r--r-- | drivers/media/video/saa7134/saa7134-input.c | 2 | ||||
| -rw-r--r-- | include/media/ir-core.h | 47 |
5 files changed, 296 insertions, 293 deletions
diff --git a/drivers/media/IR/ir-nec-decoder.c b/drivers/media/IR/ir-nec-decoder.c index 18918e52c0c..02682e617fa 100644 --- a/drivers/media/IR/ir-nec-decoder.c +++ b/drivers/media/IR/ir-nec-decoder.c @@ -13,15 +13,16 @@ */ #include <media/ir-core.h> +#include <linux/bitrev.h> #define NEC_NBITS 32 -#define NEC_UNIT 559979 /* ns */ -#define NEC_HEADER_MARK (16 * NEC_UNIT) -#define NEC_HEADER_SPACE (8 * NEC_UNIT) -#define NEC_REPEAT_SPACE (4 * NEC_UNIT) -#define NEC_MARK (NEC_UNIT) -#define NEC_0_SPACE (NEC_UNIT) -#define NEC_1_SPACE (3 * NEC_UNIT) +#define NEC_UNIT 562500 /* ns */ +#define NEC_HEADER_PULSE PULSE(16) +#define NEC_HEADER_SPACE SPACE(8) +#define NEC_REPEAT_SPACE SPACE(4) +#define NEC_BIT_PULSE PULSE(1) +#define NEC_BIT_0_SPACE SPACE(1) +#define NEC_BIT_1_SPACE SPACE(3) /* Used to register nec_decoder clients */ static LIST_HEAD(decoder_list); @@ -29,21 +30,13 @@ static DEFINE_SPINLOCK(decoder_lock); enum nec_state { STATE_INACTIVE, - STATE_HEADER_MARK, STATE_HEADER_SPACE, - STATE_MARK, - STATE_SPACE, - STATE_TRAILER_MARK, + STATE_BIT_PULSE, + STATE_BIT_SPACE, + STATE_TRAILER_PULSE, STATE_TRAILER_SPACE, }; -struct nec_code { - u8 address; - u8 not_address; - u8 command; - u8 not_command; -}; - struct decoder_data { struct list_head list; struct ir_input_dev *ir_dev; @@ -51,7 +44,7 @@ struct decoder_data { /* State machine control */ enum nec_state state; - struct nec_code nec_code; + u32 nec_bits; unsigned count; }; @@ -62,7 +55,6 @@ struct decoder_data { * * 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; @@ -123,20 +115,20 @@ static struct attribute_group decoder_attribute_group = { .attrs = decoder_attributes, }; - /** * ir_nec_decode() - Decode one NEC pulse or space * @input_dev: the struct input_dev descriptor of the device - * @ev: event array with type/duration of pulse/space + * @duration: duration in ns of pulse/space * * This function returns -EINVAL if the pulse violates the state machine */ -static int ir_nec_decode(struct input_dev *input_dev, - struct ir_raw_event *ev) +static int ir_nec_decode(struct input_dev *input_dev, s64 duration) { struct decoder_data *data; struct ir_input_dev *ir_dev = input_get_drvdata(input_dev); - int bit, last_bit; + int u; + u32 scancode; + u8 address, not_address, command, not_command; data = get_decoder_data(ir_dev); if (!data) @@ -145,150 +137,107 @@ static int ir_nec_decode(struct input_dev *input_dev, if (!data->enabled) return 0; - /* Except for the initial event, what matters is the previous bit */ - bit = (ev->type & IR_PULSE) ? 1 : 0; - - last_bit = !bit; - - /* Discards spurious space last_bits when inactive */ - - /* Very long delays are considered as start events */ - if (ev->delta.tv_nsec > NEC_HEADER_MARK + NEC_HEADER_SPACE - NEC_UNIT / 2) + if (IS_RESET(duration)) { data->state = STATE_INACTIVE; + return 0; + } - if (ev->type & IR_START_EVENT) - data->state = STATE_INACTIVE; + u = TO_UNITS(duration, NEC_UNIT); + if (DURATION(u) == 0) + goto out; + + IR_dprintk(2, "NEC decode started at state %d (%i units, %ius)\n", + data->state, u, TO_US(duration)); switch (data->state) { - case STATE_INACTIVE: - if (!bit) /* PULSE marks the start event */ - return 0; - data->count = 0; - data->state = STATE_HEADER_MARK; - memset (&data->nec_code, 0, sizeof(data->nec_code)); - return 0; - case STATE_HEADER_MARK: - if (!last_bit) - goto err; - if (ev->delta.tv_nsec < NEC_HEADER_MARK - 6 * NEC_UNIT) - goto err; - data->state = STATE_HEADER_SPACE; + case STATE_INACTIVE: + if (u == NEC_HEADER_PULSE) { + data->count = 0; + data->state = STATE_HEADER_SPACE; + } return 0; + case STATE_HEADER_SPACE: - if (last_bit) - goto err; - if (ev->delta.tv_nsec >= NEC_HEADER_SPACE - NEC_UNIT / 2) { - data->state = STATE_MARK; + if (u == NEC_HEADER_SPACE) { + data->state = STATE_BIT_PULSE; return 0; - } - - if (ev->delta.tv_nsec >= NEC_REPEAT_SPACE - NEC_UNIT / 2) { + } else if (u == NEC_REPEAT_SPACE) { ir_repeat(input_dev); IR_dprintk(1, "Repeat last key\n"); - data->state = STATE_TRAILER_MARK; + data->state = STATE_TRAILER_PULSE; return 0; } - goto err; - case STATE_MARK: - if (!last_bit) - goto err; - if ((ev->delta.tv_nsec > NEC_MARK + NEC_UNIT / 2) || - (ev->delta.tv_nsec < NEC_MARK - NEC_UNIT / 2)) - goto err; - data->state = STATE_SPACE; - return 0; - case STATE_SPACE: - if (last_bit) - goto err; - - if ((ev->delta.tv_nsec >= NEC_0_SPACE - NEC_UNIT / 2) && - (ev->delta.tv_nsec < NEC_0_SPACE + NEC_UNIT / 2)) - bit = 0; - else if ((ev->delta.tv_nsec >= NEC_1_SPACE - NEC_UNIT / 2) && - (ev->delta.tv_nsec < NEC_1_SPACE + NEC_UNIT / 2)) - bit = 1; - else { - IR_dprintk(1, "Decode failed at %d-th bit (%s) @%luus\n", - data->count, - last_bit ? "pulse" : "space", - (ev->delta.tv_nsec + 500) / 1000); - - goto err2; + break; + + case STATE_BIT_PULSE: + if (u == NEC_BIT_PULSE) { + data->state = STATE_BIT_SPACE; + return 0; + } + break; + + case STATE_BIT_SPACE: + if (u != NEC_BIT_0_SPACE && u != NEC_BIT_1_SPACE) + break; + + data->nec_bits <<= 1; + if (u == NEC_BIT_1_SPACE) + data->nec_bits |= 1; + data->count++; + + if (data->count != NEC_NBITS) { + data->state = STATE_BIT_PULSE; + return 0; + } + + 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); + + if ((command ^ not_command) != 0xff) { + IR_dprintk(1, "NEC checksum error: received 0x%08x\n", + data->nec_bits); + break; } - /* Ok, we've got a valid bit. proccess it */ - if (bit) { - int shift = data->count; - - /* - * NEC transmit bytes on this temporal order: - * address | not address | command | not command - */ - if (shift < 8) { - data->nec_code.address |= 1 << shift; - } else if (shift < 16) { - data->nec_code.not_address |= 1 << (shift - 8); - } else if (shift < 24) { - data->nec_code.command |= 1 << (shift - 16); - } else { - data->nec_code.not_command |= 1 << (shift - 24); - } + if ((address ^ not_address) != 0xff) { + /* Extended NEC */ + scancode = address << 16 | + not_address << 8 | + command; + IR_dprintk(1, "NEC (Ext) scancode 0x%06x\n", scancode); + } else { + /* normal NEC */ + scancode = address << 8 | command; + IR_dprintk(1, "NEC scancode 0x%04x\n", scancode); } - if (++data->count == NEC_NBITS) { - u32 scancode; - /* - * Fixme: may need to accept Extended NEC protocol? - */ - if ((data->nec_code.command ^ data->nec_code.not_command) != 0xff) - goto checksum_err; - - if ((data->nec_code.address ^ data->nec_code.not_address) != 0xff) { - /* Extended NEC */ - scancode = data->nec_code.address << 16 | - data->nec_code.not_address << 8 | - data->nec_code.command; - IR_dprintk(1, "NEC scancode 0x%06x\n", scancode); - } else { - /* normal NEC */ - scancode = data->nec_code.address << 8 | - data->nec_code.command; - IR_dprintk(1, "NEC scancode 0x%04x\n", scancode); - } - ir_keydown(input_dev, scancode, 0); - - data->state = STATE_TRAILER_MARK; - } else - data->state = STATE_MARK; - return 0; - case STATE_TRAILER_MARK: - if (!last_bit) - goto err; - data->state = STATE_TRAILER_SPACE; + + ir_keydown(input_dev, scancode, 0); + data->state = STATE_TRAILER_PULSE; return 0; + + case STATE_TRAILER_PULSE: + if (u > 0) { + data->state = STATE_TRAILER_SPACE; + return 0; + } + break; + case STATE_TRAILER_SPACE: - if (last_bit) - goto err; - data->state = STATE_INACTIVE; - return 0; - } + if (u < 0) { + data->state = STATE_INACTIVE; + return 0; + } -err: - IR_dprintk(1, "NEC decoded failed at state %d (%s) @ %luus\n", - data->state, - bit ? "pulse" : "space", - (ev->delta.tv_nsec + 500) / 1000); -err2: - data->state = STATE_INACTIVE; - return -EINVAL; + break; + } -checksum_err: +out: + IR_dprintk(1, "NEC decode failed at state %d (%i units, %ius)\n", + data->state, u, TO_US(duration)); data->state = STATE_INACTIVE; - IR_dprintk(1, "NEC checksum error: received 0x%02x%02x%02x%02x\n", - data->nec_code.address, - data->nec_code.not_address, - data->nec_code.command, - data->nec_code.not_command); return -EINVAL; } diff --git a/drivers/media/IR/ir-raw-event.c b/drivers/media/IR/ir-raw-event.c index bc4ca08adf4..e144f152296 100644 --- a/drivers/media/IR/ir-raw-event.c +++ b/drivers/media/IR/ir-raw-event.c @@ -15,9 +15,10 @@ #include <media/ir-core.h> #include <linux/workqueue.h> #include <linux/spinlock.h> +#include <linux/sched.h> -/* Define the max number of bit transitions per IR keycode */ -#define MAX_IR_EVENT_SIZE 256 +/* Define the max number of pulse/space transitions to buffer */ +#define MAX_IR_EVENT_SIZE 512 /* Used to handle IR raw handler extensions */ static LIST_HEAD(ir_raw_handler_list); @@ -53,19 +54,30 @@ static DEFINE_SPINLOCK(ir_raw_handler_lock); /* Used to load the decoders */ static struct work_struct wq_load; +static void ir_raw_event_work(struct work_struct *work) +{ + s64 d; + struct ir_raw_event_ctrl *raw = + container_of(work, struct ir_raw_event_ctrl, rx_work); + + while (kfifo_out(&raw->kfifo, &d, sizeof(d)) == sizeof(d)) + RUN_DECODER(decode, raw->input_dev, d); +} + int ir_raw_event_register(struct input_dev *input_dev) { struct ir_input_dev *ir = input_get_drvdata(input_dev); - int rc, size; + int rc; ir->raw = kzalloc(sizeof(*ir->raw), GFP_KERNEL); if (!ir->raw) return -ENOMEM; - size = sizeof(struct ir_raw_event) * MAX_IR_EVENT_SIZE * 2; - size = roundup_pow_of_two(size); + ir->raw->input_dev = input_dev; + INIT_WORK(&ir->raw->rx_work, ir_raw_event_work); - rc = kfifo_alloc(&ir->raw->kfifo, size, GFP_KERNEL); + rc = kfifo_alloc(&ir->raw->kfifo, sizeof(s64) * MAX_IR_EVENT_SIZE, + GFP_KERNEL); if (rc < 0) { kfree(ir->raw); ir->raw = NULL; @@ -90,6 +102,7 @@ void ir_raw_event_unregister(struct input_dev *input_dev) if (!ir->raw) return; + cancel_work_sync(&ir->raw->rx_work); RUN_DECODER(raw_unregister, input_dev); kfifo_free(&ir->raw->kfifo); @@ -97,74 +110,90 @@ void ir_raw_event_unregister(struct input_dev *input_dev) ir->raw = NULL; } -int ir_raw_event_store(struct input_dev *input_dev, enum raw_event_type type) +/** + * ir_raw_event_store() - pass a pulse/space duration to the raw ir decoders + * @input_dev: the struct input_dev device descriptor + * @duration: duration of the pulse or space in ns + * + * This routine (which may be called from an interrupt context) stores a + * pulse/space duration for the raw ir decoding state machines. Pulses are + * signalled as positive values and spaces as negative values. A zero value + * will reset the decoding state machines. + */ +int ir_raw_event_store(struct input_dev *input_dev, s64 duration) { - struct ir_input_dev *ir = input_get_drvdata(input_dev); - struct timespec ts; - struct ir_raw_event event; - int rc; + struct ir_input_dev *ir = input_get_drvdata(input_dev); if (!ir->raw) return -EINVAL; - event.type = type; - event.delta.tv_sec = 0; - event.delta.tv_nsec = 0; + if (kfifo_in(&ir->raw->kfifo, &duration, sizeof(duration)) != sizeof(duration)) + return -ENOMEM; - ktime_get_ts(&ts); + return 0; +} +EXPORT_SYMBOL_GPL(ir_raw_event_store); - if (timespec_equal(&ir->raw->last_event, &event.delta)) - event.type |= IR_START_EVENT; - else - event.delta = timespec_sub(ts, ir->raw->last_event); +/** + * ir_raw_event_store_edge() - notify raw ir decoders of the start of a pulse/space + * @input_dev: the struct input_dev device descriptor + * @type: the type of the event that has occurred + * + * This routine (which may be called from an interrupt context) is used to + * store the beginning of an ir pulse or space (or the start/end of ir + * reception) for the raw ir decoding state machines. This is used by + * hardware which does not provide durations directly but only interrupts + * (or similar events) on state change. + */ +int ir_raw_event_store_edge(struct input_dev *input_dev, enum raw_event_type type) +{ + struct ir_input_dev *ir = input_get_drvdata(input_dev); + ktime_t now; + s64 delta; /* ns */ + int rc = 0; - memcpy(&ir->raw->last_event, &ts, sizeof(ts)); + if (!ir->raw) + return -EINVAL; - if (event.delta.tv_sec) { - event.type |= IR_START_EVENT; - event.delta.tv_sec = 0; - event.delta.tv_nsec = 0; - } + now = ktime_get(); + delta = ktime_to_ns(ktime_sub(now, ir->raw->last_event)); - kfifo_in(&ir->raw->kfifo, &event, sizeof(event)); + /* Check for a long duration since last event or if we're + * being called for the first time, note that delta can't + * possibly be negative. + */ + if (delta > NSEC_PER_SEC || !ir->raw->last_type) + type |= IR_START_EVENT; + + if (type & IR_START_EVENT) + ir_raw_event_reset(input_dev); + else if (ir->raw->last_type & IR_SPACE) + rc = ir_raw_event_store(input_dev, -delta); + else if (ir->raw->last_type & IR_PULSE) + rc = ir_raw_event_store(input_dev, delta); + else + return 0; + ir->raw->last_event = now; + ir->raw->last_type = type; return rc; } -EXPORT_SYMBOL_GPL(ir_raw_event_store); +EXPORT_SYMBOL_GPL(ir_raw_event_store_edge); -int ir_raw_event_handle(struct input_dev *input_dev) +/** + * ir_raw_event_handle() - schedules the decoding of stored ir data + * @input_dev: the struct input_dev device descriptor + * + * This routine will signal the workqueue to start decoding stored ir data. + */ +void ir_raw_event_handle(struct input_dev *input_dev) { - struct ir_input_dev *ir = input_get_drvdata(input_dev); - int rc; - struct ir_raw_event ev; - int len, i; - - /* - * Store the events into a temporary buffer. This allows calling more than - * one decoder to deal with the received data - */ - len = kfifo_len(&ir->raw->kfifo) / sizeof(ev); - if (!len) - return 0; - - for (i = 0; i < len; i++) { - rc = kfifo_out(&ir->raw->kfifo, &ev, sizeof(ev)); - if (rc != sizeof(ev)) { - IR_dprintk(1, "overflow error: received %d instead of %zd\n", - rc, sizeof(ev)); - return -EINVAL; - } - IR_dprintk(2, "event type %d, time before event: %07luus\n", - ev.type, (ev.delta.tv_nsec + 500) / 1000); - rc = RUN_DECODER(decode, input_dev, &ev); - } + struct ir_input_dev *ir = input_get_drvdata(input_dev); - /* - * Call all ir decoders. This allows decoding the same event with - * more than one protocol handler. - */ + if (!ir->raw) + return; - return rc; + schedule_work(&ir->raw->rx_work); } EXPORT_SYMBOL_GPL(ir_raw_event_handle); diff --git a/drivers/media/IR/ir-rc5-decoder.c b/drivers/media/IR/ir-rc5-decoder.c index 6323066438b..1d0857b6908 100644 --- a/drivers/media/IR/ir-rc5-decoder.c +++ b/drivers/media/IR/ir-rc5-decoder.c @@ -21,11 +21,8 @@ #include <media/ir-core.h> -static unsigned int ir_rc5_remote_gap = 888888; - #define RC5_NBITS 14 -#define RC5_BIT (ir_rc5_remote_gap * 2) -#define RC5_DURATION (ir_rc5_remote_gap * RC5_NBITS) +#define RC5_UNIT 888888 /* ns */ /* Used to register rc5_decoder clients */ static LIST_HEAD(decoder_list); @@ -33,13 +30,9 @@ static DEFINE_SPINLOCK(decoder_lock); enum rc5_state { STATE_INACTIVE, - STATE_MARKSPACE, - STATE_TRAILER, -}; - -struct rc5_code { - u8 address; - u8 command; + STATE_BIT_START, + STATE_BIT_END, + STATE_FINISHED, }; struct decoder_data { @@ -49,8 +42,9 @@ struct decoder_data { /* State machine control */ enum rc5_state state; - struct rc5_code rc5_code; - unsigned code, elapsed, last_bit, last_code; + u32 rc5_bits; + int last_unit; + unsigned count; }; @@ -122,18 +116,19 @@ static struct attribute_group decoder_attribute_group = { }; /** - * handle_event() - Decode one RC-5 pulse or space + * ir_rc5_decode() - Decode one RC-5 pulse or space * @input_dev: the struct input_dev descriptor of the device - * @ev: event array with type/duration of pulse/space + * @duration: duration of pulse/space in ns * * This function returns -EINVAL if the pulse violates the state machine */ -static int ir_rc5_decode(struct input_dev *input_dev, - struct ir_raw_event *ev) +static int ir_rc5_decode(struct input_dev *input_dev, s64 duration) { struct decoder_data *data; struct ir_input_dev *ir_dev = input_get_drvdata(input_dev); - int is_pulse, scancode, delta, toggle; + u8 command, system, toggle; + u32 scancode; + int u; data = get_decoder_data(ir_dev); if (!data) @@ -142,79 +137,84 @@ static int ir_rc5_decode(struct input_dev *input_dev, if (!data->enabled) return 0; - delta = DIV_ROUND_CLOSEST(ev->delta.tv_nsec, ir_rc5_remote_gap); - - /* The duration time refers to the last bit time */ - is_pulse = (ev->type & IR_PULSE) ? 1 : 0; - - /* Very long delays are considered as start events */ - if (delta > RC5_DURATION || (ev->type & IR_START_EVENT)) + if (IS_RESET(duration)) { data->state = STATE_INACTIVE; - - switch (data->state) { - case STATE_INACTIVE: - IR_dprintk(2, "currently inative. Start bit (%s) @%uus\n", - is_pulse ? "pulse" : "space", - (unsigned)(ev->delta.tv_nsec + 500) / 1000); - - /* Discards the initial start space */ - if (!is_pulse) - goto err; - data->code = 1; - data->last_bit = 1; - data->elapsed = 0; - memset(&data->rc5_code, 0, sizeof(data->rc5_code)); - data->state = STATE_MARKSPACE; return 0; - case STATE_MARKSPACE: - if (delta != 1) - data->last_bit = data->last_bit ? 0 : 1; + } - data->elapsed += delta; + u = TO_UNITS(duration, RC5_UNIT); + if (DURATION(u) == 0) + goto out; - if ((data->elapsed % 2) == 1) - return 0; +again: + IR_dprintk(2, "RC5 decode started at state %i (%i units, %ius)\n", + data->state, u, TO_US(duration)); - data->code <<= 1; - data->code |= data->last_bit; - - /* Fill the 2 unused bits at the command with 0 */ - if (data->elapsed / 2 == 6) - data->code <<= 2; + if (DURATION(u) == 0 && data->state != STATE_FINISHED) + return 0; - if (data->elapsed >= (RC5_NBITS - 1) * 2) { - scancode = data->code; + switch (data->state) { - /* Check for the start bits */ - if ((scancode & 0xc000) != 0xc000) { - IR_dprintk(1, "Code 0x%04x doesn't have two start bits. It is not RC-5\n", scancode); - goto err; + case STATE_INACTIVE: + if (IS_PULSE(u)) { + data->state = STATE_BIT_START; + data->count = 1; + DECREASE_DURATION(u, 1); + goto again; + } + break; + + case STATE_BIT_START: + if (DURATION(u) == 1) { + data->rc5_bits <<= 1; + if (IS_SPACE(u)) + data->rc5_bits |= 1; + data->count++; + data->last_unit = u; + + /* + * If the last bit is zero, a space will merge + * with the silence after the command. + */ + if (IS_PULSE(u) && data->count == RC5_NBITS) { + data->state = STATE_FINISHED; + goto again; } - toggle = (scancode & 0x2000) ? 1 : 0; + data->state = STATE_BIT_END; + return 0; + } + break; - if (scancode == data->last_code) { - IR_dprintk(1, "RC-5 repeat\n"); - ir_repeat(input_dev); - } else { - data->last_code = scancode; - scancode &= 0x1fff; - IR_dprintk(1, "RC-5 scancode 0x%04x\n", scancode); + case STATE_BIT_END: + if (IS_TRANSITION(u, data->last_unit)) { + if (data->count == RC5_NBITS) + data->state = STATE_FINISHED; + else + data->state = STATE_BIT_START; - ir_keydown(input_dev, scancode, 0); - } - data->state = STATE_TRAILER; + DECREASE_DURATION(u, 1); + goto again; } - return 0; - case STATE_TRAILER: + break; + + case STATE_FINISHED: + 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; + scancode = system << 8 | command; + + IR_dprintk(1, "RC5 scancode 0x%04x (toggle: %u)\n", + scancode, toggle); + ir_keydown(input_dev, scancode, toggle); data->state = STATE_INACTIVE; return 0; } -err: - IR_dprintk(1, "RC-5 decoded failed at %s @ %luus\n", - is_pulse ? "pulse" : "space", - (ev->delta.tv_nsec + 500) / 1000); +out: + IR_dprintk(1, "RC5 decode failed at state %i (%i units, %ius)\n", + data->state, u, TO_US(duration)); data->state = STATE_INACTIVE; return -EINVAL; } diff --git a/drivers/media/video/saa7134/saa7134-input.c b/drivers/media/video/saa7134/saa7134-input.c index 6d5fe596245..e4681eda01f 100644 --- a/drivers/media/video/saa7134/saa7134-input.c +++ b/drivers/media/video/saa7134/saa7134-input.c @@ -1018,7 +1018,7 @@ static int saa7134_raw_decode_irq(struct saa7134_dev *dev) saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN); saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN); space = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2) & ir->mask_keydown; - ir_raw_event_store(dev->remote->dev, space ? IR_SPACE : IR_PULSE); + ir_raw_event_store_edge(dev->remote->dev, space ? IR_SPACE : IR_PULSE); /* diff --git a/include/media/ir-core.h b/include/media/ir-core.h index e9fa94fe2ef..e9a0cbf67ff 100644 --- a/include/media/ir-core.h +++ b/include/media/ir-core.h @@ -65,14 +65,12 @@ struct ir_dev_props { void (*close)(void *priv); }; -struct ir_raw_event { - struct timespec delta; /* Time spent before event */ - enum raw_event_type type; /* event type */ -}; - struct ir_raw_event_ctrl { - struct kfifo kfifo; /* fifo for the pulse/space events */ - struct timespec last_event; /* when last event occurred */ + struct work_struct rx_work; /* for the rx decoding workqueue */ + struct kfifo kfifo; /* fifo for the pulse/space durations */ + ktime_t last_event; /* when last event occurred */ + enum raw_event_type last_type; /* last event type */ + struct input_dev *input_dev; /* pointer to the parent input_dev */ }; struct ir_input_dev { @@ -97,8 +95,7 @@ struct ir_input_dev { struct ir_raw_handler { struct list_head list; - int (*decode)(struct input_dev *input_dev, - struct ir_raw_event *ev); + int (*decode)(struct input_dev *input_dev, s64 duration); int (*raw_register)(struct input_dev *input_dev); int (*raw_unregister)(struct input_dev *input_dev); }; @@ -154,8 +151,14 @@ void ir_unregister_class(struct input_dev *input_dev); /* Routines from ir-raw-event.c */ int ir_raw_event_register(struct input_dev *input_dev); void ir_raw_event_unregister(struct input_dev *input_dev); -int ir_raw_event_store(struct input_dev *input_dev, enum raw_event_type type); -int ir_raw_event_handle(struct input_dev *input_dev); +void ir_raw_event_handle(struct input_dev *input_dev); +int ir_raw_event_store(struct input_dev *input_dev, s64 duration); +int ir_raw_event_store_edge(struct input_dev *input_dev, enum raw_event_type type); +static inline void ir_raw_event_reset(struct input_dev *input_dev) +{ + ir_raw_event_store(input_dev, 0); + ir_raw_event_handle(input_dev); +} int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler); void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler); void ir_raw_init(void); @@ -174,4 +177,26 @@ void ir_raw_init(void); #define load_rc5_decode() 0 #endif +/* macros for ir decoders */ +#define PULSE(units) ((units)) +#define SPACE(units) (-(units)) +#define IS_RESET(duration) ((duration) == 0) +#define IS_PULSE(duration) ((duration) > 0) +#define IS_SPACE(duration) ((duration) < 0) +#define DURATION(duration) (abs((duration))) +#define IS_TRANSITION(x, y) ((x) * (y) < 0) +#define DECREASE_DURATION(duration, amount) \ + do { \ + if (IS_SPACE(duration)) \ + duration += (amount); \ + else if (IS_PULSE(duration)) \ + duration -= (amount); \ + } while (0) + +#define TO_UNITS(duration, unit_len) \ + ((int)((duration) > 0 ? \ + DIV_ROUND_CLOSEST(abs((duration)), (unit_len)) :\ + -DIV_ROUND_CLOSEST(abs((duration)), (unit_len)))) +#define TO_US(duration) ((int)TO_UNITS(duration, 1000)) + #endif /* _IR_CORE */ |