215 lines
6.9 KiB
C
215 lines
6.9 KiB
C
/*
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* Remote Controller core header
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*
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* Copyright (C) 2009-2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _IR_CORE
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#define _IR_CORE
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#include <linux/spinlock.h>
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#include <linux/kfifo.h>
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#include <linux/time.h>
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#include <linux/timer.h>
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#include <media/rc-map.h>
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extern int ir_core_debug;
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#define IR_dprintk(level, fmt, arg...) if (ir_core_debug >= level) \
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printk(KERN_DEBUG "%s: " fmt , __func__, ## arg)
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enum rc_driver_type {
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RC_DRIVER_SCANCODE = 0, /* Driver or hardware generates a scancode */
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RC_DRIVER_IR_RAW, /* Needs a Infra-Red pulse/space decoder */
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};
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/**
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* struct ir_dev_props - Allow caller drivers to set special properties
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* @driver_type: specifies if the driver or hardware have already a decoder,
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* or if it needs to use the IR raw event decoders to produce a scancode
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* @allowed_protos: bitmask with the supported IR_TYPE_* protocols
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* @scanmask: some hardware decoders are not capable of providing the full
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* scancode to the application. As this is a hardware limit, we can't do
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* anything with it. Yet, as the same keycode table can be used with other
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* devices, a mask is provided to allow its usage. Drivers should generally
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* leave this field in blank
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* @timeout: optional time after which device stops sending data
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* @min_timeout: minimum timeout supported by device
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* @max_timeout: maximum timeout supported by device
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* @rx_resolution : resolution (in ns) of input sampler
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* @tx_resolution: resolution (in ns) of output sampler
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* @priv: driver-specific data, to be used on the callbacks
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* @change_protocol: allow changing the protocol used on hardware decoders
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* @open: callback to allow drivers to enable polling/irq when IR input device
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* is opened.
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* @close: callback to allow drivers to disable polling/irq when IR input device
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* is opened.
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* @s_tx_mask: set transmitter mask (for devices with multiple tx outputs)
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* @s_tx_carrier: set transmit carrier frequency
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* @s_tx_duty_cycle: set transmit duty cycle (0% - 100%)
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* @s_rx_carrier: inform driver about carrier it is expected to handle
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* @tx_ir: transmit IR
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* @s_idle: optional: enable/disable hardware idle mode, upon which,
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device doesn't interrupt host until it sees IR pulses
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* @s_learning_mode: enable wide band receiver used for learning
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* @s_carrier_report: enable carrier reports
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*/
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struct ir_dev_props {
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enum rc_driver_type driver_type;
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unsigned long allowed_protos;
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u32 scanmask;
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u32 timeout;
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u32 min_timeout;
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u32 max_timeout;
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u32 rx_resolution;
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u32 tx_resolution;
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void *priv;
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int (*change_protocol)(void *priv, u64 ir_type);
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int (*open)(void *priv);
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void (*close)(void *priv);
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int (*s_tx_mask)(void *priv, u32 mask);
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int (*s_tx_carrier)(void *priv, u32 carrier);
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int (*s_tx_duty_cycle)(void *priv, u32 duty_cycle);
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int (*s_rx_carrier_range)(void *priv, u32 min, u32 max);
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int (*tx_ir)(void *priv, int *txbuf, u32 n);
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void (*s_idle)(void *priv, bool enable);
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int (*s_learning_mode)(void *priv, int enable);
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int (*s_carrier_report) (void *priv, int enable);
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};
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struct ir_input_dev {
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struct device dev; /* device */
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char *driver_name; /* Name of the driver module */
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struct ir_scancode_table rc_tab; /* scan/key table */
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unsigned long devno; /* device number */
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struct ir_dev_props *props; /* Device properties */
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struct ir_raw_event_ctrl *raw; /* for raw pulse/space events */
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struct input_dev *input_dev; /* the input device associated with this device */
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bool idle;
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/* key info - needed by IR keycode handlers */
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spinlock_t keylock; /* protects the below members */
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bool keypressed; /* current state */
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unsigned long keyup_jiffies; /* when should the current keypress be released? */
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struct timer_list timer_keyup; /* timer for releasing a keypress */
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u32 last_keycode; /* keycode of last command */
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u32 last_scancode; /* scancode of last command */
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u8 last_toggle; /* toggle of last command */
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};
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enum raw_event_type {
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IR_SPACE = (1 << 0),
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IR_PULSE = (1 << 1),
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IR_START_EVENT = (1 << 2),
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IR_STOP_EVENT = (1 << 3),
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};
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#define to_ir_input_dev(_attr) container_of(_attr, struct ir_input_dev, attr)
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/* From ir-keytable.c */
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int __ir_input_register(struct input_dev *dev,
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const struct ir_scancode_table *ir_codes,
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struct ir_dev_props *props,
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const char *driver_name);
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static inline int ir_input_register(struct input_dev *dev,
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const char *map_name,
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struct ir_dev_props *props,
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const char *driver_name) {
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struct ir_scancode_table *ir_codes;
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struct ir_input_dev *ir_dev;
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int rc;
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if (!map_name)
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return -EINVAL;
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ir_codes = get_rc_map(map_name);
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if (!ir_codes) {
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ir_codes = get_rc_map(RC_MAP_EMPTY);
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if (!ir_codes)
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return -EINVAL;
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}
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rc = __ir_input_register(dev, ir_codes, props, driver_name);
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if (rc < 0)
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return -EINVAL;
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ir_dev = input_get_drvdata(dev);
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if (!rc && ir_dev->props && ir_dev->props->change_protocol)
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rc = ir_dev->props->change_protocol(ir_dev->props->priv,
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ir_codes->ir_type);
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return rc;
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}
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void ir_input_unregister(struct input_dev *input_dev);
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void ir_repeat(struct input_dev *dev);
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void ir_keydown(struct input_dev *dev, int scancode, u8 toggle);
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void ir_keyup(struct ir_input_dev *ir);
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u32 ir_g_keycode_from_table(struct input_dev *input_dev, u32 scancode);
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/* From ir-raw-event.c */
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struct ir_raw_event {
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union {
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u32 duration;
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struct {
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u32 carrier;
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u8 duty_cycle;
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};
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};
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unsigned pulse:1;
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unsigned reset:1;
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unsigned timeout:1;
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unsigned carrier_report:1;
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};
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#define DEFINE_IR_RAW_EVENT(event) \
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struct ir_raw_event event = { \
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{ .duration = 0 } , \
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.pulse = 0, \
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.reset = 0, \
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.timeout = 0, \
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.carrier_report = 0 }
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static inline void init_ir_raw_event(struct ir_raw_event *ev)
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{
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memset(ev, 0, sizeof(*ev));
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}
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#define IR_MAX_DURATION 0xFFFFFFFF /* a bit more than 4 seconds */
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void ir_raw_event_handle(struct input_dev *input_dev);
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int ir_raw_event_store(struct input_dev *input_dev, struct ir_raw_event *ev);
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int ir_raw_event_store_edge(struct input_dev *input_dev, enum raw_event_type type);
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int ir_raw_event_store_with_filter(struct input_dev *input_dev,
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struct ir_raw_event *ev);
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void ir_raw_event_set_idle(struct input_dev *input_dev, bool idle);
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static inline void ir_raw_event_reset(struct input_dev *input_dev)
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{
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DEFINE_IR_RAW_EVENT(ev);
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ev.reset = true;
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ir_raw_event_store(input_dev, &ev);
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ir_raw_event_handle(input_dev);
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}
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#endif /* _IR_CORE */
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