2 * Remote Controller core header
4 * Copyright (C) 2009-2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation version 2 of the License.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
19 #include <linux/spinlock.h>
20 #include <linux/kfifo.h>
21 #include <linux/time.h>
22 #include <linux/timer.h>
23 #include <media/rc-map.h>
25 extern int rc_core_debug;
26 #define IR_dprintk(level, fmt, ...) \
28 if (rc_core_debug >= level) \
29 pr_debug("%s: " fmt, __func__, ##__VA_ARGS__); \
33 RC_DRIVER_SCANCODE = 0, /* Driver or hardware generates a scancode */
34 RC_DRIVER_IR_RAW, /* Needs a Infra-Red pulse/space decoder */
38 * struct rc_dev - represents a remote control device
39 * @dev: driver model's view of this device
40 * @input_name: name of the input child device
41 * @input_phys: physical path to the input child device
42 * @input_id: id of the input child device (struct input_id)
43 * @driver_name: name of the hardware driver which registered this device
44 * @map_name: name of the default keymap
45 * @rc_map: current scan/key table
46 * @lock: used to ensure we've filled in all protocol details before
47 * anyone can call show_protocols or store_protocols
48 * @devno: unique remote control device number
49 * @raw: additional data for raw pulse/space devices
50 * @input_dev: the input child device used to communicate events to userspace
51 * @driver_type: specifies if protocol decoding is done in hardware or software
52 * @idle: used to keep track of RX state
53 * @allowed_protos: bitmask with the supported RC_BIT_* protocols
54 * @enabled_protocols: bitmask with the enabled RC_BIT_* protocols
55 * @scanmask: some hardware decoders are not capable of providing the full
56 * scancode to the application. As this is a hardware limit, we can't do
57 * anything with it. Yet, as the same keycode table can be used with other
58 * devices, a mask is provided to allow its usage. Drivers should generally
59 * leave this field in blank
60 * @priv: driver-specific data
61 * @keylock: protects the remaining members of the struct
62 * @keypressed: whether a key is currently pressed
63 * @keyup_jiffies: time (in jiffies) when the current keypress should be released
64 * @timer_keyup: timer for releasing a keypress
65 * @last_keycode: keycode of last keypress
66 * @last_scancode: scancode of last keypress
67 * @last_toggle: toggle value of last command
68 * @timeout: optional time after which device stops sending data
69 * @min_timeout: minimum timeout supported by device
70 * @max_timeout: maximum timeout supported by device
71 * @rx_resolution : resolution (in ns) of input sampler
72 * @tx_resolution: resolution (in ns) of output sampler
73 * @change_protocol: allow changing the protocol used on hardware decoders
74 * @open: callback to allow drivers to enable polling/irq when IR input device
76 * @close: callback to allow drivers to disable polling/irq when IR input device
78 * @s_tx_mask: set transmitter mask (for devices with multiple tx outputs)
79 * @s_tx_carrier: set transmit carrier frequency
80 * @s_tx_duty_cycle: set transmit duty cycle (0% - 100%)
81 * @s_rx_carrier: inform driver about carrier it is expected to handle
83 * @s_idle: enable/disable hardware idle mode, upon which,
84 * device doesn't interrupt host until it sees IR pulses
85 * @s_learning_mode: enable wide band receiver used for learning
86 * @s_carrier_report: enable carrier reports
90 const char *input_name;
91 const char *input_phys;
92 struct input_id input_id;
98 struct ir_raw_event_ctrl *raw;
99 struct input_dev *input_dev;
100 enum rc_driver_type driver_type;
103 u64 enabled_protocols;
109 unsigned long keyup_jiffies;
110 struct timer_list timer_keyup;
119 int (*change_protocol)(struct rc_dev *dev, u64 *rc_type);
120 int (*open)(struct rc_dev *dev);
121 void (*close)(struct rc_dev *dev);
122 int (*s_tx_mask)(struct rc_dev *dev, u32 mask);
123 int (*s_tx_carrier)(struct rc_dev *dev, u32 carrier);
124 int (*s_tx_duty_cycle)(struct rc_dev *dev, u32 duty_cycle);
125 int (*s_rx_carrier_range)(struct rc_dev *dev, u32 min, u32 max);
126 int (*tx_ir)(struct rc_dev *dev, unsigned *txbuf, unsigned n);
127 void (*s_idle)(struct rc_dev *dev, bool enable);
128 int (*s_learning_mode)(struct rc_dev *dev, int enable);
129 int (*s_carrier_report) (struct rc_dev *dev, int enable);
132 #define to_rc_dev(d) container_of(d, struct rc_dev, dev)
136 * Those functions can be used on any type of Remote Controller. They
137 * basically creates an input_dev and properly reports the device as a
138 * Remote Controller, at sys/class/rc.
141 struct rc_dev *rc_allocate_device(void);
142 void rc_free_device(struct rc_dev *dev);
143 int rc_register_device(struct rc_dev *dev);
144 void rc_unregister_device(struct rc_dev *dev);
146 int rc_open(struct rc_dev *rdev);
147 void rc_close(struct rc_dev *rdev);
149 void rc_repeat(struct rc_dev *dev);
150 void rc_keydown(struct rc_dev *dev, int scancode, u8 toggle);
151 void rc_keydown_notimeout(struct rc_dev *dev, int scancode, u8 toggle);
152 void rc_keyup(struct rc_dev *dev);
153 u32 rc_g_keycode_from_table(struct rc_dev *dev, u32 scancode);
157 * The Raw interface is specific to InfraRed. It may be a good idea to
158 * split it later into a separate header.
161 enum raw_event_type {
164 IR_START_EVENT = (1 << 2),
165 IR_STOP_EVENT = (1 << 3),
168 struct ir_raw_event {
181 unsigned carrier_report:1;
184 #define DEFINE_IR_RAW_EVENT(event) \
185 struct ir_raw_event event = { \
186 { .duration = 0 } , \
190 .carrier_report = 0 }
192 static inline void init_ir_raw_event(struct ir_raw_event *ev)
194 memset(ev, 0, sizeof(*ev));
197 #define IR_MAX_DURATION 0xFFFFFFFF /* a bit more than 4 seconds */
198 #define US_TO_NS(usec) ((usec) * 1000)
199 #define MS_TO_US(msec) ((msec) * 1000)
200 #define MS_TO_NS(msec) ((msec) * 1000 * 1000)
202 void ir_raw_event_handle(struct rc_dev *dev);
203 int ir_raw_event_store(struct rc_dev *dev, struct ir_raw_event *ev);
204 int ir_raw_event_store_edge(struct rc_dev *dev, enum raw_event_type type);
205 int ir_raw_event_store_with_filter(struct rc_dev *dev,
206 struct ir_raw_event *ev);
207 void ir_raw_event_set_idle(struct rc_dev *dev, bool idle);
209 static inline void ir_raw_event_reset(struct rc_dev *dev)
211 DEFINE_IR_RAW_EVENT(ev);
214 ir_raw_event_store(dev, &ev);
215 ir_raw_event_handle(dev);
218 /* extract mask bits out of data and pack them into the result */
219 static inline u32 ir_extract_bits(u32 data, u32 mask)
221 u32 vbit = 1, value = 0;
230 } while (mask >>= 1);
235 #endif /* _RC_CORE */