464254e5db
The FIFO is used for ir_raw_event records, however for some historic reason the FIFO is used on a per byte basis. IMHO this adds unneeded complexity. Therefore set up the FIFO for ir_raw_event records. This also allows to define the FIFO statically as part of ir_raw_event_ctrl instead of having to allocate the FIFO dynamically. In addition: - When writing into the FIFO and it's full return ENOSPC instead of ENOMEM thus making it easier to tell between "FIFO full" and "Dynamic memory allocation failed" when the error is propagated to a higher level. Also add an error message. - When reading from the FIFO check whether it's empty. This is not strictly needed here but kfifo_out is annotated "must check" anyway. Successfully tested it with the nuvoton-cir driver. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
175 lines
4.1 KiB
C
175 lines
4.1 KiB
C
/*
|
|
* Remote Controller core raw events header
|
|
*
|
|
* Copyright (C) 2010 by Mauro Carvalho Chehab
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation version 2 of the License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#ifndef _RC_CORE_PRIV
|
|
#define _RC_CORE_PRIV
|
|
|
|
/* Define the max number of pulse/space transitions to buffer */
|
|
#define MAX_IR_EVENT_SIZE 512
|
|
|
|
#include <linux/slab.h>
|
|
#include <linux/spinlock.h>
|
|
#include <media/rc-core.h>
|
|
|
|
struct ir_raw_handler {
|
|
struct list_head list;
|
|
|
|
u64 protocols; /* which are handled by this handler */
|
|
int (*decode)(struct rc_dev *dev, struct ir_raw_event event);
|
|
|
|
/* These two should only be used by the lirc decoder */
|
|
int (*raw_register)(struct rc_dev *dev);
|
|
int (*raw_unregister)(struct rc_dev *dev);
|
|
};
|
|
|
|
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 */
|
|
enum raw_event_type last_type; /* last event type */
|
|
struct rc_dev *dev; /* pointer to the parent rc_dev */
|
|
|
|
/* raw decoder state follows */
|
|
struct ir_raw_event prev_ev;
|
|
struct ir_raw_event this_ev;
|
|
struct nec_dec {
|
|
int state;
|
|
unsigned count;
|
|
u32 bits;
|
|
bool is_nec_x;
|
|
bool necx_repeat;
|
|
} nec;
|
|
struct rc5_dec {
|
|
int state;
|
|
u32 bits;
|
|
unsigned count;
|
|
bool is_rc5x;
|
|
} rc5;
|
|
struct rc6_dec {
|
|
int state;
|
|
u8 header;
|
|
u32 body;
|
|
bool toggle;
|
|
unsigned count;
|
|
unsigned wanted_bits;
|
|
} rc6;
|
|
struct sony_dec {
|
|
int state;
|
|
u32 bits;
|
|
unsigned count;
|
|
} sony;
|
|
struct jvc_dec {
|
|
int state;
|
|
u16 bits;
|
|
u16 old_bits;
|
|
unsigned count;
|
|
bool first;
|
|
bool toggle;
|
|
} jvc;
|
|
struct sanyo_dec {
|
|
int state;
|
|
unsigned count;
|
|
u64 bits;
|
|
} sanyo;
|
|
struct sharp_dec {
|
|
int state;
|
|
unsigned count;
|
|
u32 bits;
|
|
unsigned int pulse_len;
|
|
} sharp;
|
|
struct mce_kbd_dec {
|
|
struct input_dev *idev;
|
|
struct timer_list rx_timeout;
|
|
char name[64];
|
|
char phys[64];
|
|
int state;
|
|
u8 header;
|
|
u32 body;
|
|
unsigned count;
|
|
unsigned wanted_bits;
|
|
} mce_kbd;
|
|
struct lirc_codec {
|
|
struct rc_dev *dev;
|
|
struct lirc_driver *drv;
|
|
int carrier_low;
|
|
|
|
ktime_t gap_start;
|
|
u64 gap_duration;
|
|
bool gap;
|
|
bool send_timeout_reports;
|
|
|
|
} lirc;
|
|
struct xmp_dec {
|
|
int state;
|
|
unsigned count;
|
|
u32 durations[16];
|
|
} xmp;
|
|
};
|
|
|
|
/* macros for IR decoders */
|
|
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;
|
|
}
|
|
|
|
/* Returns true if event is normal pulse/space event */
|
|
static inline bool is_timing_event(struct ir_raw_event ev)
|
|
{
|
|
return !ev.carrier_report && !ev.reset;
|
|
}
|
|
|
|
#define TO_US(duration) DIV_ROUND_CLOSEST((duration), 1000)
|
|
#define TO_STR(is_pulse) ((is_pulse) ? "pulse" : "space")
|
|
|
|
/*
|
|
* Routines from rc-raw.c to be used internally and by decoders
|
|
*/
|
|
u64 ir_raw_get_allowed_protocols(void);
|
|
int ir_raw_event_register(struct rc_dev *dev);
|
|
void ir_raw_event_unregister(struct rc_dev *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);
|
|
|
|
/*
|
|
* Decoder initialization code
|
|
*
|
|
* Those load logic are called during ir-core init, and automatically
|
|
* loads the compiled decoders for their usage with IR raw events
|
|
*/
|
|
|
|
#endif /* _RC_CORE_PRIV */
|