diff options
| -rw-r--r-- | drivers/media/IR/ir-core-priv.h | 49 | ||||
| -rw-r--r-- | drivers/media/IR/ir-nec-decoder.c | 120 | ||||
| -rw-r--r-- | drivers/media/IR/ir-raw-event.c | 30 | ||||
| -rw-r--r-- | drivers/media/IR/ir-rc5-decoder.c | 105 | ||||
| -rw-r--r-- | drivers/media/IR/ir-rc6-decoder.c | 221 | ||||
| -rw-r--r-- | include/media/ir-core.h | 16 |
6 files changed, 285 insertions, 256 deletions
diff --git a/drivers/media/IR/ir-core-priv.h b/drivers/media/IR/ir-core-priv.h index 8c1f84645eaf..77d0b94ede10 100644 --- a/drivers/media/IR/ir-core-priv.h +++ b/drivers/media/IR/ir-core-priv.h @@ -22,7 +22,7 @@ struct ir_raw_handler { struct list_head list; - int (*decode)(struct input_dev *input_dev, s64 duration); + int (*decode)(struct input_dev *input_dev, struct ir_raw_event event); int (*raw_register)(struct input_dev *input_dev); int (*raw_unregister)(struct input_dev *input_dev); }; @@ -36,26 +36,28 @@ struct ir_raw_event_ctrl { }; /* 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)) +static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin) { + return d1 > (d2 - margin); +} + +static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin) { + return ((d1 > (d2 - margin)) && (d1 < (d2 + margin))); +} + +static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y) { + return x->pulse != y->pulse; +} + +static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration) { + if (duration > ev->duration) + ev->duration = 0; + else + ev->duration -= duration; +} + +#define TO_US(duration) (((duration) + 500) / 1000) +#define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space") +#define IS_RESET(ev) (ev.duration == 0) /* * Routines from ir-sysfs.c - Meant to be called only internally inside @@ -70,11 +72,6 @@ void ir_unregister_class(struct input_dev *input_dev); */ int ir_raw_event_register(struct input_dev *input_dev); void ir_raw_event_unregister(struct input_dev *input_dev); -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); diff --git a/drivers/media/IR/ir-nec-decoder.c b/drivers/media/IR/ir-nec-decoder.c index 14609d9580a8..ba79233112ef 100644 --- a/drivers/media/IR/ir-nec-decoder.c +++ b/drivers/media/IR/ir-nec-decoder.c @@ -17,13 +17,15 @@ #define NEC_NBITS 32 #define NEC_UNIT 562500 /* ns */ -#define NEC_HEADER_PULSE PULSE(16) -#define NECX_HEADER_PULSE PULSE(8) /* Less common NEC variant */ -#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) +#define NEC_HEADER_PULSE (16 * NEC_UNIT) +#define NECX_HEADER_PULSE (8 * NEC_UNIT) /* Less common NEC variant */ +#define NEC_HEADER_SPACE (8 * NEC_UNIT) +#define NEC_REPEAT_SPACE (8 * NEC_UNIT) +#define NEC_BIT_PULSE (1 * NEC_UNIT) +#define NEC_BIT_0_SPACE (1 * NEC_UNIT) +#define NEC_BIT_1_SPACE (3 * NEC_UNIT) +#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); @@ -119,15 +121,14 @@ static struct attribute_group decoder_attribute_group = { /** * ir_nec_decode() - Decode one NEC pulse or space * @input_dev: the struct input_dev descriptor of the device - * @duration: duration in ns of pulse/space + * @duration: the struct ir_raw_event descriptor of the pulse/space * * This function returns -EINVAL if the pulse violates the state machine */ -static int ir_nec_decode(struct input_dev *input_dev, s64 duration) +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); - int u; u32 scancode; u8 address, not_address, command, not_command; @@ -138,59 +139,88 @@ static int ir_nec_decode(struct input_dev *input_dev, s64 duration) if (!data->enabled) return 0; - if (IS_RESET(duration)) { + if (IS_RESET(ev)) { data->state = STATE_INACTIVE; return 0; } - 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)); + IR_dprintk(2, "NEC decode started at state %d (%uus %s)\n", + data->state, TO_US(ev.duration), TO_STR(ev.pulse)); switch (data->state) { case STATE_INACTIVE: - if (u == NEC_HEADER_PULSE || u == NECX_HEADER_PULSE) { - data->count = 0; - data->state = STATE_HEADER_SPACE; - } + if (!ev.pulse) + break; + + if (!eq_margin(ev.duration, NEC_HEADER_PULSE, NEC_UNIT / 2) && + !eq_margin(ev.duration, NECX_HEADER_PULSE, NEC_UNIT / 2)) + break; + + data->count = 0; + data->state = STATE_HEADER_SPACE; return 0; case STATE_HEADER_SPACE: - if (u == NEC_HEADER_SPACE) { + if (ev.pulse) + break; + + if (eq_margin(ev.duration, NEC_HEADER_SPACE, NEC_UNIT / 2)) { data->state = STATE_BIT_PULSE; return 0; - } else if (u == NEC_REPEAT_SPACE) { + } else if (eq_margin(ev.duration, NEC_REPEAT_SPACE, NEC_UNIT / 2)) { ir_repeat(input_dev); IR_dprintk(1, "Repeat last key\n"); data->state = STATE_TRAILER_PULSE; return 0; } + break; case STATE_BIT_PULSE: - if (u == NEC_BIT_PULSE) { - data->state = STATE_BIT_SPACE; - return 0; - } - break; + if (!ev.pulse) + break; + + if (!eq_margin(ev.duration, NEC_BIT_PULSE, NEC_UNIT / 2)) + break; + + data->state = STATE_BIT_SPACE; + return 0; case STATE_BIT_SPACE: - if (u != NEC_BIT_0_SPACE && u != NEC_BIT_1_SPACE) + if (ev.pulse) break; data->nec_bits <<= 1; - if (u == NEC_BIT_1_SPACE) + if (eq_margin(ev.duration, NEC_BIT_1_SPACE, NEC_UNIT / 2)) data->nec_bits |= 1; + else if (!eq_margin(ev.duration, NEC_BIT_0_SPACE, NEC_UNIT / 2)) + break; data->count++; - if (data->count != NEC_NBITS) { + if (data->count == NEC_NBITS) + data->state = STATE_TRAILER_PULSE; + else data->state = STATE_BIT_PULSE; - return 0; - } + + return 0; + + case STATE_TRAILER_PULSE: + if (!ev.pulse) + break; + + if (!eq_margin(ev.duration, NEC_TRAILER_PULSE, NEC_UNIT / 2)) + break; + + data->state = STATE_TRAILER_SPACE; + return 0; + + case STATE_TRAILER_SPACE: + if (ev.pulse) + break; + + 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); @@ -210,34 +240,18 @@ static int ir_nec_decode(struct input_dev *input_dev, s64 duration) command; IR_dprintk(1, "NEC (Ext) scancode 0x%06x\n", scancode); } else { - /* normal NEC */ + /* Normal NEC */ scancode = address << 8 | command; IR_dprintk(1, "NEC scancode 0x%04x\n", scancode); } ir_keydown(input_dev, scancode, 0); - data->state = STATE_TRAILER_PULSE; + data->state = STATE_INACTIVE; return 0; - - case STATE_TRAILER_PULSE: - if (u > 0) { - data->state = STATE_TRAILER_SPACE; - return 0; - } - break; - - case STATE_TRAILER_SPACE: - if (u < 0) { - data->state = STATE_INACTIVE; - return 0; - } - - break; } -out: - IR_dprintk(1, "NEC decode failed at state %d (%i units, %ius)\n", - data->state, u, TO_US(duration)); + IR_dprintk(1, "NEC decode failed at state %d (%uus %s)\n", + data->state, TO_US(ev.duration), TO_STR(ev.pulse)); data->state = STATE_INACTIVE; return -EINVAL; } diff --git a/drivers/media/IR/ir-raw-event.c b/drivers/media/IR/ir-raw-event.c index 674442b2f0a8..59f173c45b9d 100644 --- a/drivers/media/IR/ir-raw-event.c +++ b/drivers/media/IR/ir-raw-event.c @@ -57,12 +57,12 @@ static struct work_struct wq_load; static void ir_raw_event_work(struct work_struct *work) { - s64 d; + struct ir_raw_event ev; 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); + while (kfifo_out(&raw->kfifo, &ev, sizeof(ev)) == sizeof(ev)) + RUN_DECODER(decode, raw->input_dev, ev); } int ir_raw_event_register(struct input_dev *input_dev) @@ -114,21 +114,21 @@ void ir_raw_event_unregister(struct input_dev *input_dev) /** * 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 + * @ev: the struct ir_raw_event descriptor of the pulse/space * * 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) +int ir_raw_event_store(struct input_dev *input_dev, struct ir_raw_event *ev) { struct ir_input_dev *ir = input_get_drvdata(input_dev); if (!ir->raw) return -EINVAL; - if (kfifo_in(&ir->raw->kfifo, &duration, sizeof(duration)) != sizeof(duration)) + if (kfifo_in(&ir->raw->kfifo, ev, sizeof(*ev)) != sizeof(*ev)) return -ENOMEM; return 0; @@ -151,6 +151,7 @@ int ir_raw_event_store_edge(struct input_dev *input_dev, enum raw_event_type typ struct ir_input_dev *ir = input_get_drvdata(input_dev); ktime_t now; s64 delta; /* ns */ + struct ir_raw_event ev; int rc = 0; if (!ir->raw) @@ -163,16 +164,21 @@ int ir_raw_event_store_edge(struct input_dev *input_dev, enum raw_event_type typ * being called for the first time, note that delta can't * possibly be negative. */ - if (delta > NSEC_PER_SEC || !ir->raw->last_type) + ev.duration = 0; + if (delta > IR_MAX_DURATION || !ir->raw->last_type) type |= IR_START_EVENT; + else + ev.duration = delta; 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 + else if (ir->raw->last_type & IR_SPACE) { + ev.pulse = false; + rc = ir_raw_event_store(input_dev, &ev); + } else if (ir->raw->last_type & IR_PULSE) { + ev.pulse = true; + rc = ir_raw_event_store(input_dev, &ev); + } else return 0; ir->raw->last_event = now; diff --git a/drivers/media/IR/ir-rc5-decoder.c b/drivers/media/IR/ir-rc5-decoder.c index dd5a4d5f25fd..23cdb1b1a3bc 100644 --- a/drivers/media/IR/ir-rc5-decoder.c +++ b/drivers/media/IR/ir-rc5-decoder.c @@ -25,8 +25,10 @@ #define RC5_NBITS 14 #define RC5X_NBITS 20 #define CHECK_RC5X_NBITS 8 -#define RC5X_SPACE SPACE(4) #define RC5_UNIT 888888 /* ns */ +#define RC5_BIT_START (1 * RC5_UNIT) +#define RC5_BIT_END (1 * RC5_UNIT) +#define RC5X_SPACE (4 * RC5_UNIT) /* Used to register rc5_decoder clients */ static LIST_HEAD(decoder_list); @@ -48,7 +50,7 @@ struct decoder_data { /* State machine control */ enum rc5_state state; u32 rc5_bits; - int last_unit; + struct ir_raw_event prev_ev; unsigned count; unsigned wanted_bits; }; @@ -124,17 +126,16 @@ static struct attribute_group decoder_attribute_group = { /** * ir_rc5_decode() - Decode one RC-5 pulse or space * @input_dev: the struct input_dev descriptor of the device - * @duration: duration of pulse/space in ns + * @ev: the struct ir_raw_event descriptor of the pulse/space * * This function returns -EINVAL if the pulse violates the state machine */ -static int ir_rc5_decode(struct input_dev *input_dev, s64 duration) +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); u8 toggle; u32 scancode; - int u; data = get_decoder_data(ir_dev); if (!data) @@ -143,76 +144,65 @@ static int ir_rc5_decode(struct input_dev *input_dev, s64 duration) if (!data->enabled) return 0; - if (IS_RESET(duration)) { + if (IS_RESET(ev)) { data->state = STATE_INACTIVE; return 0; } - u = TO_UNITS(duration, RC5_UNIT); - if (DURATION(u) == 0) + if (!geq_margin(ev.duration, RC5_UNIT, RC5_UNIT / 2)) goto out; again: - IR_dprintk(2, "RC5(x) decode started at state %i (%i units, %ius)\n", - data->state, u, TO_US(duration)); + IR_dprintk(2, "RC5(x) decode started at state %i (%uus %s)\n", + data->state, TO_US(ev.duration), TO_STR(ev.pulse)); - if (DURATION(u) == 0 && data->state != STATE_FINISHED) + if (!geq_margin(ev.duration, RC5_UNIT, RC5_UNIT / 2)) return 0; switch (data->state) { case STATE_INACTIVE: - if (IS_PULSE(u)) { - data->state = STATE_BIT_START; - data->count = 1; - /* We just need enough bits to get to STATE_CHECK_RC5X */ - data->wanted_bits = RC5X_NBITS; - DECREASE_DURATION(u, 1); - goto again; - } - break; + if (!ev.pulse) + break; + + data->state = STATE_BIT_START; + data->count = 1; + /* We just need enough bits to get to STATE_CHECK_RC5X */ + data->wanted_bits = RC5X_NBITS; + decrease_duration(&ev, RC5_BIT_START); + goto again; 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 == data->wanted_bits) { - data->state = STATE_FINISHED; - goto again; - } - - data->state = STATE_BIT_END; - return 0; - } - break; + if (!eq_margin(ev.duration, RC5_BIT_START, RC5_UNIT / 2)) + break; + + data->rc5_bits <<= 1; + if (!ev.pulse) + data->rc5_bits |= 1; + data->count++; + data->prev_ev = ev; + data->state = STATE_BIT_END; + return 0; case STATE_BIT_END: - if (IS_TRANSITION(u, data->last_unit)) { - if (data->count == data->wanted_bits) - data->state = STATE_FINISHED; - else if (data->count == CHECK_RC5X_NBITS) - data->state = STATE_CHECK_RC5X; - else - data->state = STATE_BIT_START; - - DECREASE_DURATION(u, 1); - goto again; - } - break; + if (!is_transition(&ev, &data->prev_ev)) + break; + + if (data->count == data->wanted_bits) + data->state = STATE_FINISHED; + else if (data->count == CHECK_RC5X_NBITS) + data->state = STATE_CHECK_RC5X; + else + data->state = STATE_BIT_START; + + decrease_duration(&ev, RC5_BIT_END); + goto again; case STATE_CHECK_RC5X: - if (IS_SPACE(u) && DURATION(u) >= DURATION(RC5X_SPACE)) { + if (!ev.pulse && geq_margin(ev.duration, RC5X_SPACE, RC5_UNIT / 2)) { /* RC5X */ data->wanted_bits = RC5X_NBITS; - DECREASE_DURATION(u, DURATION(RC5X_SPACE)); + decrease_duration(&ev, RC5X_SPACE); } else { /* RC5 */ data->wanted_bits = RC5_NBITS; @@ -221,6 +211,9 @@ again: goto again; case STATE_FINISHED: + if (ev.pulse) + break; + if (data->wanted_bits == RC5X_NBITS) { /* RC5X */ u8 xdata, command, system; @@ -253,8 +246,8 @@ again: } out: - IR_dprintk(1, "RC5(x) decode failed at state %i (%i units, %ius)\n", - data->state, u, TO_US(duration)); + IR_dprintk(1, "RC5(x) decode failed at state %i (%uus %s)\n", + data->state, TO_US(ev.duration), TO_STR(ev.pulse)); data->state = STATE_INACTIVE; return -EINVAL; } diff --git a/drivers/media/IR/ir-rc6-decoder.c b/drivers/media/IR/ir-rc6-decoder.c index ccc5be240f82..2bf479f4f1bc 100644 --- a/drivers/media/IR/ir-rc6-decoder.c +++ b/drivers/media/IR/ir-rc6-decoder.c @@ -26,8 +26,12 @@ #define RC6_0_NBITS 16 #define RC6_6A_SMALL_NBITS 24 #define RC6_6A_LARGE_NBITS 32 -#define RC6_PREFIX_PULSE PULSE(6) -#define RC6_PREFIX_SPACE SPACE(2) +#define RC6_PREFIX_PULSE (6 * RC6_UNIT) +#define RC6_PREFIX_SPACE (2 * RC6_UNIT) +#define RC6_BIT_START (1 * RC6_UNIT) +#define RC6_BIT_END (1 * RC6_UNIT) +#define RC6_TOGGLE_START (2 * RC6_UNIT) +#define RC6_TOGGLE_END (2 * RC6_UNIT) #define RC6_MODE_MASK 0x07 /* for the header bits */ #define RC6_STARTBIT_MASK 0x08 /* for the header bits */ #define RC6_6A_MCE_TOGGLE_MASK 0x8000 /* for the body bits */ @@ -63,7 +67,7 @@ struct decoder_data { enum rc6_state state; u8 header; u32 body; - int last_unit; + struct ir_raw_event prev_ev; bool toggle; unsigned count; unsigned wanted_bits; @@ -152,17 +156,16 @@ static enum rc6_mode rc6_mode(struct decoder_data *data) { /** * ir_rc6_decode() - Decode one RC6 pulse or space * @input_dev: the struct input_dev descriptor of the device - * @duration: duration of pulse/space in ns + * @ev: the struct ir_raw_event descriptor of the pulse/space * * This function returns -EINVAL if the pulse violates the state machine */ -static int ir_rc6_decode(struct input_dev *input_dev, s64 duration) +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); u32 scancode; u8 toggle; - int u; data = get_decoder_data(ir_dev); if (!data) @@ -171,140 +174,144 @@ static int ir_rc6_decode(struct input_dev *input_dev, s64 duration) if (!data->enabled) return 0; - if (IS_RESET(duration)) { + if (IS_RESET(ev)) { data->state = STATE_INACTIVE; return 0; } - u = TO_UNITS(duration, RC6_UNIT); - if (DURATION(u) == 0) + if (!geq_margin(ev.duration, RC6_UNIT, RC6_UNIT / 2)) goto out; again: - IR_dprintk(2, "RC6 decode started at state %i (%i units, %ius)\n", - data->state, u, TO_US(duration)); + IR_dprintk(2, "RC6 decode started at state %i (%uus %s)\n", + data->state, TO_US(ev.duration), TO_STR(ev.pulse)); - if (DURATION(u) == 0 && data->state != STATE_FINISHED) + if (!geq_margin(ev.duration, RC6_UNIT, RC6_UNIT / 2)) return 0; switch (data->state) { case STATE_INACTIVE: - if (u >= RC6_PREFIX_PULSE - 1 && u <= RC6_PREFIX_PULSE + 1) { - data->state = STATE_PREFIX_SPACE; - data->count = 0; - return 0; - } - break; + if (!ev.pulse) + break; + + /* Note: larger margin on first pulse since each RC6_UNIT + is quite short and some hardware takes some time to + adjust to the signal */ + if (!eq_margin(ev.duration, RC6_PREFIX_PULSE, RC6_UNIT)) + break; + + data->state = STATE_PREFIX_SPACE; + data->count = 0; + return 0; case STATE_PREFIX_SPACE: - if (u == RC6_PREFIX_SPACE) { - data->state = STATE_HEADER_BIT_START; - return 0; - } - break; + if (ev.pulse) + break; + + if (!eq_margin(ev.duration, RC6_PREFIX_SPACE, RC6_UNIT / 2)) + break; + + data->state = STATE_HEADER_BIT_START; + return 0; case STATE_HEADER_BIT_START: - if (DURATION(u) == 1) { - data->header <<= 1; - if (IS_PULSE(u)) - data->header |= 1; - data->count++; - data->last_unit = u; - data->state = STATE_HEADER_BIT_END; - return 0; - } - break; + if (!eq_margin(ev.duration, RC6_BIT_START, RC6_UNIT / 2)) + break; + + data->header <<= 1; + 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(u, data->last_unit)) { - if (data->count == RC6_HEADER_NBITS) - data->state = STATE_TOGGLE_START; - else - data->state = STATE_HEADER_BIT_START; + if (!is_transition(&ev, &data->prev_ev)) + break; - DECREASE_DURATION(u, 1); - goto again; - } - break; + if (data->count == RC6_HEADER_NBITS) + data->state = STATE_TOGGLE_START; + else + data->state = STATE_HEADER_BIT_START; + + decrease_duration(&ev, RC6_BIT_END); + goto again; case STATE_TOGGLE_START: - if (DURATION(u) == 2) { - data->toggle = IS_PULSE(u); - data->last_unit = u; - data->state = STATE_TOGGLE_END; - return 0; - } - break; + if (!eq_margin(ev.duration, RC6_TOGGLE_START, RC6_UNIT / 2)) + break; + + data->toggle = ev.pulse; + data->prev_ev = ev; + data->state = STATE_TOGGLE_END; + return 0; case STATE_TOGGLE_END: - if (IS_TRANSITION(u, data->last_unit) && DURATION(u) >= 2) { - data->state = STATE_BODY_BIT_START; - data->last_unit = u; - DECREASE_DURATION(u, 2); - data->count = 0; + if (!is_transition(&ev, &data->prev_ev) || + !geq_margin(ev.duration, RC6_TOGGLE_END, RC6_UNIT / 2)) + break; - if (!(data->header & RC6_STARTBIT_MASK)) { - IR_dprintk(1, "RC6 invalid start bit\n"); - break; - } + if (!(data->header & RC6_STARTBIT_MASK)) { + IR_dprintk(1, "RC6 invalid start bit\n"); + break; + } - switch (rc6_mode(data)) { - case RC6_MODE_0: - data->wanted_bits = RC6_0_NBITS; - break; - case RC6_MODE_6A: - /* This might look weird, but we basically - check the value of the first body bit to - determine the number of bits in mode 6A */ - if ((DURATION(u) == 0 && IS_SPACE(data->last_unit)) || DURATION(u) > 0) - data->wanted_bits = RC6_6A_LARGE_NBITS; - else - data->wanted_bits = RC6_6A_SMALL_NBITS; - break; - default: - IR_dprintk(1, "RC6 unknown mode\n"); - goto out; - } - goto again; + data->state = STATE_BODY_BIT_START; + data->prev_ev = ev; + decrease_duration(&ev, RC6_TOGGLE_END); + data->count = 0; + + switch (rc6_mode(data)) { + case RC6_MODE_0: + data->wanted_bits = RC6_0_NBITS; + break; + case RC6_MODE_6A: + /* This might look weird, but we basically + check the value of the first body bit to + determine the number of bits in mode 6A */ + if ((!ev.pulse && !geq_margin(ev.duration, RC6_UNIT, RC6_UNIT / 2)) || + geq_margin(ev.duration, RC6_UNIT, RC6_UNIT / 2)) + data->wanted_bits = RC6_6A_LARGE_NBITS; + else + data->wanted_bits = RC6_6A_SMALL_NBITS; + break; + default: + IR_dprintk(1, "RC6 unknown mode\n"); + goto out; } - break; + goto again; case STATE_BODY_BIT_START: - if (DURATION(u) == 1) { - data->body <<= 1; - if (IS_PULSE(u)) - data->body |= 1; - data->count++; - data->last_unit = u; - - /* - * If the last bit is one, a space will merge - * with the silence after the command. - */ - if (IS_PULSE(u) && data->count == data->wanted_bits) { - data->state = STATE_FINISHED; - goto again; - } + if (!eq_margin(ev.duration, RC6_BIT_START, RC6_UNIT / 2)) + break; - data->state = STATE_BODY_BIT_END; - return 0; - } - break; + data->body <<= 1; + 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(u, data->last_unit)) { - if (data->count == data->wanted_bits) - data->state = STATE_FINISHED; - else - data->state = STATE_BODY_BIT_START; + if (!is_transition(&ev, &data->prev_ev)) + break; - DECREASE_DURATION(u, 1); - goto again; - } - break; + if (data->count == data->wanted_bits) + data->state = STATE_FINISHED; + else + data->state = STATE_BODY_BIT_START; + + decrease_duration(&ev, RC6_BIT_END); + goto again; case STATE_FINISHED: + if (ev.pulse) + break; + switch (rc6_mode(data)) { case RC6_MODE_0: scancode = data->body & 0xffff; @@ -335,8 +342,8 @@ again: } out: - IR_dprintk(1, "RC6 decode failed at state %i (%i units, %ius)\n", - data->state, u, TO_US(duration)); + IR_dprintk(1, "RC6 decode failed at state %i (%uus %s)\n", + data->state, TO_US(ev.duration), TO_STR(ev.pulse)); data->state = STATE_INACTIVE; return -EINVAL; } diff --git a/include/media/ir-core.h b/include/media/ir-core.h index 51e8eb3a3f2d..ad1303f20e00 100644 --- a/include/media/ir-core.h +++ b/include/media/ir-core.h @@ -128,9 +128,21 @@ u32 ir_g_keycode_from_table(struct input_dev *input_dev, u32 scancode); /* From ir-raw-event.c */ +struct ir_raw_event { + unsigned pulse:1; + unsigned duration:31; +}; + +#define IR_MAX_DURATION 0x7FFFFFFF /* a bit more than 2 seconds */ + 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(struct input_dev *input_dev, struct ir_raw_event *ev); 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) +{ + struct ir_raw_event ev = { .pulse = false, .duration = 0 }; + ir_raw_event_store(input_dev, &ev); + ir_raw_event_handle(input_dev); +} #endif /* _IR_CORE */ |
