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446e4a64 MCC |
1 | /* |
2 | * Remote Controller core header | |
3 | * | |
37e59f87 | 4 | * Copyright (C) 2009-2010 by Mauro Carvalho Chehab |
995187be | 5 | * |
446e4a64 MCC |
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. | |
9 | * | |
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. | |
14 | */ | |
15 | ||
ca86674b MCC |
16 | #ifndef _RC_CORE |
17 | #define _RC_CORE | |
446e4a64 | 18 | |
446e4a64 | 19 | #include <linux/spinlock.h> |
a3572c34 MCC |
20 | #include <linux/kfifo.h> |
21 | #include <linux/time.h> | |
9f154782 | 22 | #include <linux/timer.h> |
02858eed | 23 | #include <media/rc-map.h> |
446e4a64 | 24 | |
6bda9644 | 25 | extern int rc_core_debug; |
86b0dbef JP |
26 | #define IR_dprintk(level, fmt, ...) \ |
27 | do { \ | |
28 | if (rc_core_debug >= level) \ | |
7cec72ce | 29 | printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ |
86b0dbef | 30 | } while (0) |
446e4a64 | 31 | |
5b6137dc MCC |
32 | /** |
33 | * enum rc_driver_type - type of the RC output | |
34 | * | |
35 | * @RC_DRIVER_SCANCODE: Driver or hardware generates a scancode | |
36 | * @RC_DRIVER_IR_RAW: Driver or hardware generates pulse/space sequences. | |
37 | * It needs a Infra-Red pulse/space decoder | |
38 | */ | |
626cf697 | 39 | enum rc_driver_type { |
5b6137dc MCC |
40 | RC_DRIVER_SCANCODE = 0, |
41 | RC_DRIVER_IR_RAW, | |
626cf697 MCC |
42 | }; |
43 | ||
00942d1a JH |
44 | /** |
45 | * struct rc_scancode_filter - Filter scan codes. | |
46 | * @data: Scancode data to match. | |
47 | * @mask: Mask of bits of scancode to compare. | |
48 | */ | |
49 | struct rc_scancode_filter { | |
50 | u32 data; | |
51 | u32 mask; | |
52 | }; | |
53 | ||
54 | /** | |
55 | * enum rc_filter_type - Filter type constants. | |
56 | * @RC_FILTER_NORMAL: Filter for normal operation. | |
57 | * @RC_FILTER_WAKEUP: Filter for waking from suspend. | |
58 | * @RC_FILTER_MAX: Number of filter types. | |
59 | */ | |
60 | enum rc_filter_type { | |
61 | RC_FILTER_NORMAL = 0, | |
62 | RC_FILTER_WAKEUP, | |
63 | ||
64 | RC_FILTER_MAX | |
65 | }; | |
66 | ||
9dfe4e83 | 67 | /** |
d8b4b582 DH |
68 | * struct rc_dev - represents a remote control device |
69 | * @dev: driver model's view of this device | |
078600f5 | 70 | * @initialized: 1 if the device init has completed, 0 otherwise |
99b0f3c9 | 71 | * @sysfs_groups: sysfs attribute groups |
d8b4b582 DH |
72 | * @input_name: name of the input child device |
73 | * @input_phys: physical path to the input child device | |
74 | * @input_id: id of the input child device (struct input_id) | |
75 | * @driver_name: name of the hardware driver which registered this device | |
76 | * @map_name: name of the default keymap | |
b088ba65 | 77 | * @rc_map: current scan/key table |
08aeb7c9 JW |
78 | * @lock: used to ensure we've filled in all protocol details before |
79 | * anyone can call show_protocols or store_protocols | |
fcb13097 | 80 | * @minor: unique minor remote control device number |
d8b4b582 DH |
81 | * @raw: additional data for raw pulse/space devices |
82 | * @input_dev: the input child device used to communicate events to userspace | |
08aeb7c9 | 83 | * @driver_type: specifies if protocol decoding is done in hardware or software |
d8b4b582 | 84 | * @idle: used to keep track of RX state |
c5540fbb DH |
85 | * @allowed_protocols: bitmask with the supported RC_BIT_* protocols |
86 | * @enabled_protocols: bitmask with the enabled RC_BIT_* protocols | |
87 | * @allowed_wakeup_protocols: bitmask with the supported RC_BIT_* wakeup protocols | |
88 | * @enabled_wakeup_protocols: bitmask with the enabled RC_BIT_* wakeup protocols | |
89 | * @scancode_filter: scancode filter | |
90 | * @scancode_wakeup_filter: scancode wakeup filters | |
9d2f1d3c | 91 | * @scancode_mask: some hardware decoders are not capable of providing the full |
9dfe4e83 MCC |
92 | * scancode to the application. As this is a hardware limit, we can't do |
93 | * anything with it. Yet, as the same keycode table can be used with other | |
94 | * devices, a mask is provided to allow its usage. Drivers should generally | |
95 | * leave this field in blank | |
9d2f1d3c | 96 | * @users: number of current users of the device |
d8b4b582 DH |
97 | * @priv: driver-specific data |
98 | * @keylock: protects the remaining members of the struct | |
99 | * @keypressed: whether a key is currently pressed | |
100 | * @keyup_jiffies: time (in jiffies) when the current keypress should be released | |
101 | * @timer_keyup: timer for releasing a keypress | |
102 | * @last_keycode: keycode of last keypress | |
120703f9 | 103 | * @last_protocol: protocol of last keypress |
d8b4b582 DH |
104 | * @last_scancode: scancode of last keypress |
105 | * @last_toggle: toggle value of last command | |
4a702ebf ML |
106 | * @timeout: optional time after which device stops sending data |
107 | * @min_timeout: minimum timeout supported by device | |
108 | * @max_timeout: maximum timeout supported by device | |
e589333f ML |
109 | * @rx_resolution : resolution (in ns) of input sampler |
110 | * @tx_resolution: resolution (in ns) of output sampler | |
9dfe4e83 | 111 | * @change_protocol: allow changing the protocol used on hardware decoders |
ab88c66d JH |
112 | * @change_wakeup_protocol: allow changing the protocol used for wakeup |
113 | * filtering | |
9dfe4e83 MCC |
114 | * @open: callback to allow drivers to enable polling/irq when IR input device |
115 | * is opened. | |
116 | * @close: callback to allow drivers to disable polling/irq when IR input device | |
117 | * is opened. | |
9b7c54d9 JW |
118 | * @s_tx_mask: set transmitter mask (for devices with multiple tx outputs) |
119 | * @s_tx_carrier: set transmit carrier frequency | |
e589333f | 120 | * @s_tx_duty_cycle: set transmit duty cycle (0% - 100%) |
fa810845 | 121 | * @s_rx_carrier_range: inform driver about carrier it is expected to handle |
9b7c54d9 | 122 | * @tx_ir: transmit IR |
d8b4b582 DH |
123 | * @s_idle: enable/disable hardware idle mode, upon which, |
124 | * device doesn't interrupt host until it sees IR pulses | |
e589333f | 125 | * @s_learning_mode: enable wide band receiver used for learning |
4651918a | 126 | * @s_carrier_report: enable carrier reports |
120703f9 | 127 | * @s_filter: set the scancode filter |
23c843b5 | 128 | * @s_wakeup_filter: set the wakeup scancode filter |
4f253cec | 129 | * @s_timeout: set hardware timeout in ns |
9dfe4e83 | 130 | */ |
d8b4b582 DH |
131 | struct rc_dev { |
132 | struct device dev; | |
078600f5 | 133 | atomic_t initialized; |
99b0f3c9 | 134 | const struct attribute_group *sysfs_groups[5]; |
d8b4b582 DH |
135 | const char *input_name; |
136 | const char *input_phys; | |
137 | struct input_id input_id; | |
138 | char *driver_name; | |
139 | const char *map_name; | |
08aeb7c9 JW |
140 | struct rc_map rc_map; |
141 | struct mutex lock; | |
fcb13097 | 142 | unsigned int minor; |
d8b4b582 DH |
143 | struct ir_raw_event_ctrl *raw; |
144 | struct input_dev *input_dev; | |
145 | enum rc_driver_type driver_type; | |
4a702ebf | 146 | bool idle; |
c5540fbb DH |
147 | u64 allowed_protocols; |
148 | u64 enabled_protocols; | |
149 | u64 allowed_wakeup_protocols; | |
150 | u64 enabled_wakeup_protocols; | |
151 | struct rc_scancode_filter scancode_filter; | |
152 | struct rc_scancode_filter scancode_wakeup_filter; | |
9d2f1d3c | 153 | u32 scancode_mask; |
8b2ff320 | 154 | u32 users; |
d8b4b582 DH |
155 | void *priv; |
156 | spinlock_t keylock; | |
157 | bool keypressed; | |
158 | unsigned long keyup_jiffies; | |
159 | struct timer_list timer_keyup; | |
160 | u32 last_keycode; | |
120703f9 | 161 | enum rc_type last_protocol; |
d8b4b582 DH |
162 | u32 last_scancode; |
163 | u8 last_toggle; | |
164 | u32 timeout; | |
165 | u32 min_timeout; | |
166 | u32 max_timeout; | |
167 | u32 rx_resolution; | |
168 | u32 tx_resolution; | |
c003ab1b | 169 | int (*change_protocol)(struct rc_dev *dev, u64 *rc_type); |
ab88c66d | 170 | int (*change_wakeup_protocol)(struct rc_dev *dev, u64 *rc_type); |
d8b4b582 DH |
171 | int (*open)(struct rc_dev *dev); |
172 | void (*close)(struct rc_dev *dev); | |
173 | int (*s_tx_mask)(struct rc_dev *dev, u32 mask); | |
174 | int (*s_tx_carrier)(struct rc_dev *dev, u32 carrier); | |
175 | int (*s_tx_duty_cycle)(struct rc_dev *dev, u32 duty_cycle); | |
176 | int (*s_rx_carrier_range)(struct rc_dev *dev, u32 min, u32 max); | |
5588dc2b | 177 | int (*tx_ir)(struct rc_dev *dev, unsigned *txbuf, unsigned n); |
d8b4b582 DH |
178 | void (*s_idle)(struct rc_dev *dev, bool enable); |
179 | int (*s_learning_mode)(struct rc_dev *dev, int enable); | |
180 | int (*s_carrier_report) (struct rc_dev *dev, int enable); | |
00942d1a | 181 | int (*s_filter)(struct rc_dev *dev, |
00942d1a | 182 | struct rc_scancode_filter *filter); |
23c843b5 DH |
183 | int (*s_wakeup_filter)(struct rc_dev *dev, |
184 | struct rc_scancode_filter *filter); | |
4f253cec SY |
185 | int (*s_timeout)(struct rc_dev *dev, |
186 | unsigned int timeout); | |
75543cce | 187 | }; |
a3572c34 | 188 | |
ca86674b MCC |
189 | #define to_rc_dev(d) container_of(d, struct rc_dev, dev) |
190 | ||
191 | /* | |
192 | * From rc-main.c | |
193 | * Those functions can be used on any type of Remote Controller. They | |
194 | * basically creates an input_dev and properly reports the device as a | |
195 | * Remote Controller, at sys/class/rc. | |
196 | */ | |
197 | ||
5b6137dc MCC |
198 | /** |
199 | * rc_allocate_device - Allocates a RC device | |
200 | * | |
201 | * returns a pointer to struct rc_dev. | |
202 | */ | |
ca86674b | 203 | struct rc_dev *rc_allocate_device(void); |
5b6137dc MCC |
204 | |
205 | /** | |
206 | * rc_free_device - Frees a RC device | |
207 | * | |
208 | * @dev: pointer to struct rc_dev. | |
209 | */ | |
ca86674b | 210 | void rc_free_device(struct rc_dev *dev); |
5b6137dc MCC |
211 | |
212 | /** | |
213 | * rc_register_device - Registers a RC device | |
214 | * | |
215 | * @dev: pointer to struct rc_dev. | |
216 | */ | |
ca86674b | 217 | int rc_register_device(struct rc_dev *dev); |
5b6137dc MCC |
218 | |
219 | /** | |
220 | * rc_unregister_device - Unregisters a RC device | |
221 | * | |
222 | * @dev: pointer to struct rc_dev. | |
223 | */ | |
ca86674b MCC |
224 | void rc_unregister_device(struct rc_dev *dev); |
225 | ||
5b6137dc MCC |
226 | /** |
227 | * rc_open - Opens a RC device | |
228 | * | |
229 | * @rdev: pointer to struct rc_dev. | |
230 | */ | |
8b2ff320 | 231 | int rc_open(struct rc_dev *rdev); |
5b6137dc MCC |
232 | |
233 | /** | |
234 | * rc_open - Closes a RC device | |
235 | * | |
236 | * @rdev: pointer to struct rc_dev. | |
237 | */ | |
8b2ff320 SK |
238 | void rc_close(struct rc_dev *rdev); |
239 | ||
ca86674b | 240 | void rc_repeat(struct rc_dev *dev); |
120703f9 DH |
241 | void rc_keydown(struct rc_dev *dev, enum rc_type protocol, u32 scancode, u8 toggle); |
242 | void rc_keydown_notimeout(struct rc_dev *dev, enum rc_type protocol, u32 scancode, u8 toggle); | |
ca86674b MCC |
243 | void rc_keyup(struct rc_dev *dev); |
244 | u32 rc_g_keycode_from_table(struct rc_dev *dev, u32 scancode); | |
245 | ||
246 | /* | |
247 | * From rc-raw.c | |
248 | * The Raw interface is specific to InfraRed. It may be a good idea to | |
249 | * split it later into a separate header. | |
250 | */ | |
251 | ||
3f113e36 MCC |
252 | enum raw_event_type { |
253 | IR_SPACE = (1 << 0), | |
254 | IR_PULSE = (1 << 1), | |
255 | IR_START_EVENT = (1 << 2), | |
256 | IR_STOP_EVENT = (1 << 3), | |
995187be MCC |
257 | }; |
258 | ||
e40b1127 | 259 | struct ir_raw_event { |
4651918a ML |
260 | union { |
261 | u32 duration; | |
5f61ff86 | 262 | u32 carrier; |
4651918a | 263 | }; |
5f61ff86 | 264 | u8 duty_cycle; |
4651918a ML |
265 | |
266 | unsigned pulse:1; | |
267 | unsigned reset:1; | |
268 | unsigned timeout:1; | |
269 | unsigned carrier_report:1; | |
e40b1127 DH |
270 | }; |
271 | ||
5f61ff86 | 272 | #define DEFINE_IR_RAW_EVENT(event) struct ir_raw_event event = {} |
4651918a ML |
273 | |
274 | static inline void init_ir_raw_event(struct ir_raw_event *ev) | |
275 | { | |
276 | memset(ev, 0, sizeof(*ev)); | |
277 | } | |
278 | ||
c8e1bbc5 | 279 | #define IR_DEFAULT_TIMEOUT MS_TO_NS(125) |
6b20cf3c | 280 | #define IR_MAX_DURATION 500000000 /* 500 ms */ |
5aad7242 JW |
281 | #define US_TO_NS(usec) ((usec) * 1000) |
282 | #define MS_TO_US(msec) ((msec) * 1000) | |
283 | #define MS_TO_NS(msec) ((msec) * 1000 * 1000) | |
e40b1127 | 284 | |
d8b4b582 DH |
285 | void ir_raw_event_handle(struct rc_dev *dev); |
286 | int ir_raw_event_store(struct rc_dev *dev, struct ir_raw_event *ev); | |
287 | int ir_raw_event_store_edge(struct rc_dev *dev, enum raw_event_type type); | |
288 | int ir_raw_event_store_with_filter(struct rc_dev *dev, | |
4a702ebf | 289 | struct ir_raw_event *ev); |
d8b4b582 | 290 | void ir_raw_event_set_idle(struct rc_dev *dev, bool idle); |
4a702ebf | 291 | |
d8b4b582 | 292 | static inline void ir_raw_event_reset(struct rc_dev *dev) |
e40b1127 | 293 | { |
5f61ff86 | 294 | struct ir_raw_event ev = { .reset = true }; |
4651918a | 295 | |
d8b4b582 DH |
296 | ir_raw_event_store(dev, &ev); |
297 | ir_raw_event_handle(dev); | |
e40b1127 | 298 | } |
724e2495 | 299 | |
3ffea498 DH |
300 | /* extract mask bits out of data and pack them into the result */ |
301 | static inline u32 ir_extract_bits(u32 data, u32 mask) | |
302 | { | |
303 | u32 vbit = 1, value = 0; | |
304 | ||
305 | do { | |
829ba9fe DH |
306 | if (mask & 1) { |
307 | if (data & 1) | |
308 | value |= vbit; | |
309 | vbit <<= 1; | |
310 | } | |
311 | data >>= 1; | |
3ffea498 DH |
312 | } while (mask >>= 1); |
313 | ||
314 | return value; | |
315 | } | |
316 | ||
ca86674b | 317 | #endif /* _RC_CORE */ |