diff options
Diffstat (limited to 'drivers/media/rc/rc-core-priv.h')
| -rw-r--r-- | drivers/media/rc/rc-core-priv.h | 109 |
1 files changed, 107 insertions, 2 deletions
diff --git a/drivers/media/rc/rc-core-priv.h b/drivers/media/rc/rc-core-priv.h index 585d5e52118d..a70a5c557434 100644 --- a/drivers/media/rc/rc-core-priv.h +++ b/drivers/media/rc/rc-core-priv.h @@ -20,7 +20,6 @@ #define MAX_IR_EVENT_SIZE 512 #include <linux/slab.h> -#include <linux/spinlock.h> #include <media/rc-core.h> struct ir_raw_handler { @@ -28,6 +27,8 @@ struct ir_raw_handler { u64 protocols; /* which are handled by this handler */ int (*decode)(struct rc_dev *dev, struct ir_raw_event event); + int (*encode)(enum rc_type protocol, u32 scancode, + struct ir_raw_event *events, unsigned int max); /* These two should only be used by the lirc decoder */ int (*raw_register)(struct rc_dev *dev); @@ -37,7 +38,6 @@ struct ir_raw_handler { struct ir_raw_event_ctrl { struct list_head list; /* to keep track of raw clients */ struct task_struct *thread; - spinlock_t lock; /* fifo for the pulse/space durations */ DECLARE_KFIFO(kfifo, struct ir_raw_event, MAX_IR_EVENT_SIZE); ktime_t last_event; /* when last event occurred */ @@ -154,6 +154,111 @@ static inline bool is_timing_event(struct ir_raw_event ev) #define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000) #define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space") +/* functions for IR encoders */ + +static inline void init_ir_raw_event_duration(struct ir_raw_event *ev, + unsigned int pulse, + u32 duration) +{ + init_ir_raw_event(ev); + ev->duration = duration; + ev->pulse = pulse; +} + +/** + * struct ir_raw_timings_manchester - Manchester coding timings + * @leader: duration of leader pulse (if any) 0 if continuing + * existing signal (see @pulse_space_start) + * @pulse_space_start: 1 for starting with pulse (0 for starting with space) + * @clock: duration of each pulse/space in ns + * @invert: if set clock logic is inverted + * (0 = space + pulse, 1 = pulse + space) + * @trailer_space: duration of trailer space in ns + */ +struct ir_raw_timings_manchester { + unsigned int leader; + unsigned int pulse_space_start:1; + unsigned int clock; + unsigned int invert:1; + unsigned int trailer_space; +}; + +int ir_raw_gen_manchester(struct ir_raw_event **ev, unsigned int max, + const struct ir_raw_timings_manchester *timings, + unsigned int n, unsigned int data); + +/** + * ir_raw_gen_pulse_space() - generate pulse and space raw events. + * @ev: Pointer to pointer to next free raw event. + * Will be incremented for each raw event written. + * @max: Pointer to number of raw events available in buffer. + * Will be decremented for each raw event written. + * @pulse_width: Width of pulse in ns. + * @space_width: Width of space in ns. + * + * Returns: 0 on success. + * -ENOBUFS if there isn't enough buffer space to write both raw + * events. In this case @max events will have been written. + */ +static inline int ir_raw_gen_pulse_space(struct ir_raw_event **ev, + unsigned int *max, + unsigned int pulse_width, + unsigned int space_width) +{ + if (!*max) + return -ENOBUFS; + init_ir_raw_event_duration((*ev)++, 1, pulse_width); + if (!--*max) + return -ENOBUFS; + init_ir_raw_event_duration((*ev)++, 0, space_width); + --*max; + return 0; +} + +/** + * struct ir_raw_timings_pd - pulse-distance modulation timings + * @header_pulse: duration of header pulse in ns (0 for none) + * @header_space: duration of header space in ns + * @bit_pulse: duration of bit pulse in ns + * @bit_space: duration of bit space (for logic 0 and 1) in ns + * @trailer_pulse: duration of trailer pulse in ns + * @trailer_space: duration of trailer space in ns + * @msb_first: 1 if most significant bit is sent first + */ +struct ir_raw_timings_pd { + unsigned int header_pulse; + unsigned int header_space; + unsigned int bit_pulse; + unsigned int bit_space[2]; + unsigned int trailer_pulse; + unsigned int trailer_space; + unsigned int msb_first:1; +}; + +int ir_raw_gen_pd(struct ir_raw_event **ev, unsigned int max, + const struct ir_raw_timings_pd *timings, + unsigned int n, u64 data); + +/** + * struct ir_raw_timings_pl - pulse-length modulation timings + * @header_pulse: duration of header pulse in ns (0 for none) + * @bit_space: duration of bit space in ns + * @bit_pulse: duration of bit pulse (for logic 0 and 1) in ns + * @trailer_space: duration of trailer space in ns + * @msb_first: 1 if most significant bit is sent first + */ +struct ir_raw_timings_pl { + unsigned int header_pulse; + unsigned int bit_space; + unsigned int bit_pulse[2]; + unsigned int trailer_space; + unsigned int msb_first:1; +}; + +int ir_raw_gen_pl(struct ir_raw_event **ev, unsigned int max, + const struct ir_raw_timings_pl *timings, + unsigned int n, u64 data); + /* * Routines from rc-raw.c to be used internally and by decoders */ |