2 * Remote Controller core header
4 * Copyright (C) 2009-2010 by Mauro Carvalho Chehab
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_scancode_filter - Filter scan codes.
39 * @data: Scancode data to match.
40 * @mask: Mask of bits of scancode to compare.
42 struct rc_scancode_filter {
48 * enum rc_filter_type - Filter type constants.
49 * @RC_FILTER_NORMAL: Filter for normal operation.
50 * @RC_FILTER_WAKEUP: Filter for waking from suspend.
51 * @RC_FILTER_MAX: Number of filter types.
61 * struct rc_dev - represents a remote control device
62 * @dev: driver model's view of this device
63 * @input_name: name of the input child device
64 * @input_phys: physical path to the input child device
65 * @input_id: id of the input child device (struct input_id)
66 * @driver_name: name of the hardware driver which registered this device
67 * @map_name: name of the default keymap
68 * @rc_map: current scan/key table
69 * @lock: used to ensure we've filled in all protocol details before
70 * anyone can call show_protocols or store_protocols
71 * @devno: unique remote control device number
72 * @raw: additional data for raw pulse/space devices
73 * @input_dev: the input child device used to communicate events to userspace
74 * @driver_type: specifies if protocol decoding is done in hardware or software
75 * @idle: used to keep track of RX state
76 * @allowed_protos: bitmask with the supported RC_BIT_* protocols
77 * @enabled_protocols: bitmask with the enabled RC_BIT_* protocols
78 * @scanmask: some hardware decoders are not capable of providing the full
79 * scancode to the application. As this is a hardware limit, we can't do
80 * anything with it. Yet, as the same keycode table can be used with other
81 * devices, a mask is provided to allow its usage. Drivers should generally
82 * leave this field in blank
83 * @priv: driver-specific data
84 * @keylock: protects the remaining members of the struct
85 * @keypressed: whether a key is currently pressed
86 * @keyup_jiffies: time (in jiffies) when the current keypress should be released
87 * @timer_keyup: timer for releasing a keypress
88 * @last_keycode: keycode of last keypress
89 * @last_scancode: scancode of last keypress
90 * @last_toggle: toggle value of last command
91 * @timeout: optional time after which device stops sending data
92 * @min_timeout: minimum timeout supported by device
93 * @max_timeout: maximum timeout supported by device
94 * @rx_resolution : resolution (in ns) of input sampler
95 * @tx_resolution: resolution (in ns) of output sampler
96 * @scancode_filters: scancode filters (indexed by enum rc_filter_type)
97 * @change_protocol: allow changing the protocol used on hardware decoders
98 * @open: callback to allow drivers to enable polling/irq when IR input device
100 * @close: callback to allow drivers to disable polling/irq when IR input device
102 * @s_tx_mask: set transmitter mask (for devices with multiple tx outputs)
103 * @s_tx_carrier: set transmit carrier frequency
104 * @s_tx_duty_cycle: set transmit duty cycle (0% - 100%)
105 * @s_rx_carrier: inform driver about carrier it is expected to handle
106 * @tx_ir: transmit IR
107 * @s_idle: enable/disable hardware idle mode, upon which,
108 * device doesn't interrupt host until it sees IR pulses
109 * @s_learning_mode: enable wide band receiver used for learning
110 * @s_carrier_report: enable carrier reports
111 * @s_filter: set the scancode filter of a given type
115 const char *input_name;
116 const char *input_phys;
117 struct input_id input_id;
119 const char *map_name;
120 struct rc_map rc_map;
123 struct ir_raw_event_ctrl *raw;
124 struct input_dev *input_dev;
125 enum rc_driver_type driver_type;
128 u64 enabled_protocols;
134 unsigned long keyup_jiffies;
135 struct timer_list timer_keyup;
144 struct rc_scancode_filter scancode_filters[RC_FILTER_MAX];
145 int (*change_protocol)(struct rc_dev *dev, u64 *rc_type);
146 int (*open)(struct rc_dev *dev);
147 void (*close)(struct rc_dev *dev);
148 int (*s_tx_mask)(struct rc_dev *dev, u32 mask);
149 int (*s_tx_carrier)(struct rc_dev *dev, u32 carrier);
150 int (*s_tx_duty_cycle)(struct rc_dev *dev, u32 duty_cycle);
151 int (*s_rx_carrier_range)(struct rc_dev *dev, u32 min, u32 max);
152 int (*tx_ir)(struct rc_dev *dev, unsigned *txbuf, unsigned n);
153 void (*s_idle)(struct rc_dev *dev, bool enable);
154 int (*s_learning_mode)(struct rc_dev *dev, int enable);
155 int (*s_carrier_report) (struct rc_dev *dev, int enable);
156 int (*s_filter)(struct rc_dev *dev,
157 enum rc_filter_type type,
158 struct rc_scancode_filter *filter);
161 #define to_rc_dev(d) container_of(d, struct rc_dev, dev)
163 static inline bool rc_protocols_allowed(struct rc_dev *rdev, u64 protos)
165 return rdev->allowed_protos & protos;
168 /* should be called prior to registration or with mutex held */
169 static inline void rc_set_allowed_protocols(struct rc_dev *rdev, u64 protos)
171 rdev->allowed_protos = protos;
174 static inline bool rc_protocols_enabled(struct rc_dev *rdev, u64 protos)
176 return rdev->enabled_protocols & protos;
179 /* should be called prior to registration or with mutex held */
180 static inline void rc_set_enabled_protocols(struct rc_dev *rdev, u64 protos)
182 rdev->enabled_protocols = protos;
187 * Those functions can be used on any type of Remote Controller. They
188 * basically creates an input_dev and properly reports the device as a
189 * Remote Controller, at sys/class/rc.
192 struct rc_dev *rc_allocate_device(void);
193 void rc_free_device(struct rc_dev *dev);
194 int rc_register_device(struct rc_dev *dev);
195 void rc_unregister_device(struct rc_dev *dev);
197 int rc_open(struct rc_dev *rdev);
198 void rc_close(struct rc_dev *rdev);
200 void rc_repeat(struct rc_dev *dev);
201 void rc_keydown(struct rc_dev *dev, int scancode, u8 toggle);
202 void rc_keydown_notimeout(struct rc_dev *dev, int scancode, u8 toggle);
203 void rc_keyup(struct rc_dev *dev);
204 u32 rc_g_keycode_from_table(struct rc_dev *dev, u32 scancode);
208 * The Raw interface is specific to InfraRed. It may be a good idea to
209 * split it later into a separate header.
212 enum raw_event_type {
215 IR_START_EVENT = (1 << 2),
216 IR_STOP_EVENT = (1 << 3),
219 struct ir_raw_event {
232 unsigned carrier_report:1;
235 #define DEFINE_IR_RAW_EVENT(event) \
236 struct ir_raw_event event = { \
237 { .duration = 0 } , \
241 .carrier_report = 0 }
243 static inline void init_ir_raw_event(struct ir_raw_event *ev)
245 memset(ev, 0, sizeof(*ev));
248 #define IR_MAX_DURATION 0xFFFFFFFF /* a bit more than 4 seconds */
249 #define US_TO_NS(usec) ((usec) * 1000)
250 #define MS_TO_US(msec) ((msec) * 1000)
251 #define MS_TO_NS(msec) ((msec) * 1000 * 1000)
253 void ir_raw_event_handle(struct rc_dev *dev);
254 int ir_raw_event_store(struct rc_dev *dev, struct ir_raw_event *ev);
255 int ir_raw_event_store_edge(struct rc_dev *dev, enum raw_event_type type);
256 int ir_raw_event_store_with_filter(struct rc_dev *dev,
257 struct ir_raw_event *ev);
258 void ir_raw_event_set_idle(struct rc_dev *dev, bool idle);
260 static inline void ir_raw_event_reset(struct rc_dev *dev)
262 DEFINE_IR_RAW_EVENT(ev);
265 ir_raw_event_store(dev, &ev);
266 ir_raw_event_handle(dev);
269 /* extract mask bits out of data and pack them into the result */
270 static inline u32 ir_extract_bits(u32 data, u32 mask)
272 u32 vbit = 1, value = 0;
281 } while (mask >>= 1);
286 #endif /* _RC_CORE */