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Commit | Line | Data |
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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 | * | |
d34aee10 AS |
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 | * @RC_DRIVER_IR_RAW_TX: Device transmitter only, | |
39 | * driver requires pulse/space data sequence. | |
5b6137dc | 40 | */ |
626cf697 | 41 | enum rc_driver_type { |
5b6137dc MCC |
42 | RC_DRIVER_SCANCODE = 0, |
43 | RC_DRIVER_IR_RAW, | |
d34aee10 | 44 | RC_DRIVER_IR_RAW_TX, |
626cf697 MCC |
45 | }; |
46 | ||
00942d1a JH |
47 | /** |
48 | * struct rc_scancode_filter - Filter scan codes. | |
49 | * @data: Scancode data to match. | |
50 | * @mask: Mask of bits of scancode to compare. | |
51 | */ | |
52 | struct rc_scancode_filter { | |
53 | u32 data; | |
54 | u32 mask; | |
55 | }; | |
56 | ||
57 | /** | |
58 | * enum rc_filter_type - Filter type constants. | |
59 | * @RC_FILTER_NORMAL: Filter for normal operation. | |
60 | * @RC_FILTER_WAKEUP: Filter for waking from suspend. | |
61 | * @RC_FILTER_MAX: Number of filter types. | |
62 | */ | |
63 | enum rc_filter_type { | |
64 | RC_FILTER_NORMAL = 0, | |
65 | RC_FILTER_WAKEUP, | |
66 | ||
67 | RC_FILTER_MAX | |
68 | }; | |
69 | ||
9dfe4e83 | 70 | /** |
d8b4b582 DH |
71 | * struct rc_dev - represents a remote control device |
72 | * @dev: driver model's view of this device | |
078600f5 | 73 | * @initialized: 1 if the device init has completed, 0 otherwise |
ddbf7d5a | 74 | * @managed_alloc: devm_rc_allocate_device was used to create rc_dev |
99b0f3c9 | 75 | * @sysfs_groups: sysfs attribute groups |
d8b4b582 DH |
76 | * @input_name: name of the input child device |
77 | * @input_phys: physical path to the input child device | |
78 | * @input_id: id of the input child device (struct input_id) | |
79 | * @driver_name: name of the hardware driver which registered this device | |
80 | * @map_name: name of the default keymap | |
b088ba65 | 81 | * @rc_map: current scan/key table |
08aeb7c9 JW |
82 | * @lock: used to ensure we've filled in all protocol details before |
83 | * anyone can call show_protocols or store_protocols | |
fcb13097 | 84 | * @minor: unique minor remote control device number |
d8b4b582 DH |
85 | * @raw: additional data for raw pulse/space devices |
86 | * @input_dev: the input child device used to communicate events to userspace | |
08aeb7c9 | 87 | * @driver_type: specifies if protocol decoding is done in hardware or software |
d8b4b582 | 88 | * @idle: used to keep track of RX state |
f423ccc1 JH |
89 | * @encode_wakeup: wakeup filtering uses IR encode API, therefore the allowed |
90 | * wakeup protocols is the set of all raw encoders | |
c5540fbb DH |
91 | * @allowed_protocols: bitmask with the supported RC_BIT_* protocols |
92 | * @enabled_protocols: bitmask with the enabled RC_BIT_* protocols | |
93 | * @allowed_wakeup_protocols: bitmask with the supported RC_BIT_* wakeup protocols | |
0751d33c SY |
94 | * @wakeup_protocol: the enabled RC_TYPE_* wakeup protocol or |
95 | * RC_TYPE_UNKNOWN if disabled. | |
c5540fbb DH |
96 | * @scancode_filter: scancode filter |
97 | * @scancode_wakeup_filter: scancode wakeup filters | |
9d2f1d3c | 98 | * @scancode_mask: some hardware decoders are not capable of providing the full |
9dfe4e83 MCC |
99 | * scancode to the application. As this is a hardware limit, we can't do |
100 | * anything with it. Yet, as the same keycode table can be used with other | |
101 | * devices, a mask is provided to allow its usage. Drivers should generally | |
102 | * leave this field in blank | |
9d2f1d3c | 103 | * @users: number of current users of the device |
d8b4b582 DH |
104 | * @priv: driver-specific data |
105 | * @keylock: protects the remaining members of the struct | |
106 | * @keypressed: whether a key is currently pressed | |
107 | * @keyup_jiffies: time (in jiffies) when the current keypress should be released | |
108 | * @timer_keyup: timer for releasing a keypress | |
109 | * @last_keycode: keycode of last keypress | |
120703f9 | 110 | * @last_protocol: protocol of last keypress |
d8b4b582 DH |
111 | * @last_scancode: scancode of last keypress |
112 | * @last_toggle: toggle value of last command | |
4a702ebf ML |
113 | * @timeout: optional time after which device stops sending data |
114 | * @min_timeout: minimum timeout supported by device | |
115 | * @max_timeout: maximum timeout supported by device | |
e589333f ML |
116 | * @rx_resolution : resolution (in ns) of input sampler |
117 | * @tx_resolution: resolution (in ns) of output sampler | |
9dfe4e83 MCC |
118 | * @change_protocol: allow changing the protocol used on hardware decoders |
119 | * @open: callback to allow drivers to enable polling/irq when IR input device | |
120 | * is opened. | |
121 | * @close: callback to allow drivers to disable polling/irq when IR input device | |
122 | * is opened. | |
9b7c54d9 JW |
123 | * @s_tx_mask: set transmitter mask (for devices with multiple tx outputs) |
124 | * @s_tx_carrier: set transmit carrier frequency | |
e589333f | 125 | * @s_tx_duty_cycle: set transmit duty cycle (0% - 100%) |
fa810845 | 126 | * @s_rx_carrier_range: inform driver about carrier it is expected to handle |
9b7c54d9 | 127 | * @tx_ir: transmit IR |
d8b4b582 DH |
128 | * @s_idle: enable/disable hardware idle mode, upon which, |
129 | * device doesn't interrupt host until it sees IR pulses | |
e589333f | 130 | * @s_learning_mode: enable wide band receiver used for learning |
4651918a | 131 | * @s_carrier_report: enable carrier reports |
120703f9 | 132 | * @s_filter: set the scancode filter |
0751d33c SY |
133 | * @s_wakeup_filter: set the wakeup scancode filter. If the mask is zero |
134 | * then wakeup should be disabled. wakeup_protocol will be set to | |
135 | * a valid protocol if mask is nonzero. | |
4f253cec | 136 | * @s_timeout: set hardware timeout in ns |
9dfe4e83 | 137 | */ |
d8b4b582 DH |
138 | struct rc_dev { |
139 | struct device dev; | |
078600f5 | 140 | atomic_t initialized; |
ddbf7d5a | 141 | bool managed_alloc; |
99b0f3c9 | 142 | const struct attribute_group *sysfs_groups[5]; |
d8b4b582 DH |
143 | const char *input_name; |
144 | const char *input_phys; | |
145 | struct input_id input_id; | |
146 | char *driver_name; | |
147 | const char *map_name; | |
08aeb7c9 JW |
148 | struct rc_map rc_map; |
149 | struct mutex lock; | |
fcb13097 | 150 | unsigned int minor; |
d8b4b582 DH |
151 | struct ir_raw_event_ctrl *raw; |
152 | struct input_dev *input_dev; | |
153 | enum rc_driver_type driver_type; | |
4a702ebf | 154 | bool idle; |
f423ccc1 | 155 | bool encode_wakeup; |
c5540fbb DH |
156 | u64 allowed_protocols; |
157 | u64 enabled_protocols; | |
158 | u64 allowed_wakeup_protocols; | |
0751d33c | 159 | enum rc_type wakeup_protocol; |
c5540fbb DH |
160 | struct rc_scancode_filter scancode_filter; |
161 | struct rc_scancode_filter scancode_wakeup_filter; | |
9d2f1d3c | 162 | u32 scancode_mask; |
8b2ff320 | 163 | u32 users; |
d8b4b582 DH |
164 | void *priv; |
165 | spinlock_t keylock; | |
166 | bool keypressed; | |
167 | unsigned long keyup_jiffies; | |
168 | struct timer_list timer_keyup; | |
169 | u32 last_keycode; | |
120703f9 | 170 | enum rc_type last_protocol; |
d8b4b582 DH |
171 | u32 last_scancode; |
172 | u8 last_toggle; | |
173 | u32 timeout; | |
174 | u32 min_timeout; | |
175 | u32 max_timeout; | |
176 | u32 rx_resolution; | |
177 | u32 tx_resolution; | |
c003ab1b | 178 | int (*change_protocol)(struct rc_dev *dev, u64 *rc_type); |
d8b4b582 DH |
179 | int (*open)(struct rc_dev *dev); |
180 | void (*close)(struct rc_dev *dev); | |
181 | int (*s_tx_mask)(struct rc_dev *dev, u32 mask); | |
182 | int (*s_tx_carrier)(struct rc_dev *dev, u32 carrier); | |
183 | int (*s_tx_duty_cycle)(struct rc_dev *dev, u32 duty_cycle); | |
184 | int (*s_rx_carrier_range)(struct rc_dev *dev, u32 min, u32 max); | |
5588dc2b | 185 | int (*tx_ir)(struct rc_dev *dev, unsigned *txbuf, unsigned n); |
d8b4b582 DH |
186 | void (*s_idle)(struct rc_dev *dev, bool enable); |
187 | int (*s_learning_mode)(struct rc_dev *dev, int enable); | |
188 | int (*s_carrier_report) (struct rc_dev *dev, int enable); | |
00942d1a | 189 | int (*s_filter)(struct rc_dev *dev, |
00942d1a | 190 | struct rc_scancode_filter *filter); |
23c843b5 DH |
191 | int (*s_wakeup_filter)(struct rc_dev *dev, |
192 | struct rc_scancode_filter *filter); | |
4f253cec SY |
193 | int (*s_timeout)(struct rc_dev *dev, |
194 | unsigned int timeout); | |
75543cce | 195 | }; |
a3572c34 | 196 | |
ca86674b MCC |
197 | #define to_rc_dev(d) container_of(d, struct rc_dev, dev) |
198 | ||
199 | /* | |
200 | * From rc-main.c | |
201 | * Those functions can be used on any type of Remote Controller. They | |
202 | * basically creates an input_dev and properly reports the device as a | |
203 | * Remote Controller, at sys/class/rc. | |
204 | */ | |
205 | ||
5b6137dc MCC |
206 | /** |
207 | * rc_allocate_device - Allocates a RC device | |
208 | * | |
0f7499fd | 209 | * @rc_driver_type: specifies the type of the RC output to be allocated |
5b6137dc MCC |
210 | * returns a pointer to struct rc_dev. |
211 | */ | |
0f7499fd | 212 | struct rc_dev *rc_allocate_device(enum rc_driver_type); |
5b6137dc | 213 | |
ddbf7d5a HK |
214 | /** |
215 | * devm_rc_allocate_device - Managed RC device allocation | |
216 | * | |
217 | * @dev: pointer to struct device | |
0f7499fd | 218 | * @rc_driver_type: specifies the type of the RC output to be allocated |
ddbf7d5a HK |
219 | * returns a pointer to struct rc_dev. |
220 | */ | |
0f7499fd | 221 | struct rc_dev *devm_rc_allocate_device(struct device *dev, enum rc_driver_type); |
ddbf7d5a | 222 | |
5b6137dc MCC |
223 | /** |
224 | * rc_free_device - Frees a RC device | |
225 | * | |
226 | * @dev: pointer to struct rc_dev. | |
227 | */ | |
ca86674b | 228 | void rc_free_device(struct rc_dev *dev); |
5b6137dc MCC |
229 | |
230 | /** | |
231 | * rc_register_device - Registers a RC device | |
232 | * | |
233 | * @dev: pointer to struct rc_dev. | |
234 | */ | |
ca86674b | 235 | int rc_register_device(struct rc_dev *dev); |
5b6137dc | 236 | |
ddbf7d5a HK |
237 | /** |
238 | * devm_rc_register_device - Manageded registering of a RC device | |
239 | * | |
240 | * @parent: pointer to struct device. | |
241 | * @dev: pointer to struct rc_dev. | |
242 | */ | |
243 | int devm_rc_register_device(struct device *parent, struct rc_dev *dev); | |
244 | ||
5b6137dc MCC |
245 | /** |
246 | * rc_unregister_device - Unregisters a RC device | |
247 | * | |
248 | * @dev: pointer to struct rc_dev. | |
249 | */ | |
ca86674b MCC |
250 | void rc_unregister_device(struct rc_dev *dev); |
251 | ||
5b6137dc MCC |
252 | /** |
253 | * rc_open - Opens a RC device | |
254 | * | |
255 | * @rdev: pointer to struct rc_dev. | |
256 | */ | |
8b2ff320 | 257 | int rc_open(struct rc_dev *rdev); |
5b6137dc MCC |
258 | |
259 | /** | |
e383ce07 | 260 | * rc_close - Closes a RC device |
5b6137dc MCC |
261 | * |
262 | * @rdev: pointer to struct rc_dev. | |
263 | */ | |
8b2ff320 SK |
264 | void rc_close(struct rc_dev *rdev); |
265 | ||
ca86674b | 266 | void rc_repeat(struct rc_dev *dev); |
120703f9 DH |
267 | void rc_keydown(struct rc_dev *dev, enum rc_type protocol, u32 scancode, u8 toggle); |
268 | void rc_keydown_notimeout(struct rc_dev *dev, enum rc_type protocol, u32 scancode, u8 toggle); | |
ca86674b MCC |
269 | void rc_keyup(struct rc_dev *dev); |
270 | u32 rc_g_keycode_from_table(struct rc_dev *dev, u32 scancode); | |
271 | ||
272 | /* | |
273 | * From rc-raw.c | |
274 | * The Raw interface is specific to InfraRed. It may be a good idea to | |
275 | * split it later into a separate header. | |
276 | */ | |
277 | ||
3f113e36 MCC |
278 | enum raw_event_type { |
279 | IR_SPACE = (1 << 0), | |
280 | IR_PULSE = (1 << 1), | |
281 | IR_START_EVENT = (1 << 2), | |
282 | IR_STOP_EVENT = (1 << 3), | |
995187be MCC |
283 | }; |
284 | ||
e40b1127 | 285 | struct ir_raw_event { |
4651918a ML |
286 | union { |
287 | u32 duration; | |
5f61ff86 | 288 | u32 carrier; |
4651918a | 289 | }; |
5f61ff86 | 290 | u8 duty_cycle; |
4651918a ML |
291 | |
292 | unsigned pulse:1; | |
293 | unsigned reset:1; | |
294 | unsigned timeout:1; | |
295 | unsigned carrier_report:1; | |
e40b1127 DH |
296 | }; |
297 | ||
5f61ff86 | 298 | #define DEFINE_IR_RAW_EVENT(event) struct ir_raw_event event = {} |
4651918a ML |
299 | |
300 | static inline void init_ir_raw_event(struct ir_raw_event *ev) | |
301 | { | |
302 | memset(ev, 0, sizeof(*ev)); | |
303 | } | |
304 | ||
c8e1bbc5 | 305 | #define IR_DEFAULT_TIMEOUT MS_TO_NS(125) |
6b20cf3c | 306 | #define IR_MAX_DURATION 500000000 /* 500 ms */ |
5aad7242 JW |
307 | #define US_TO_NS(usec) ((usec) * 1000) |
308 | #define MS_TO_US(msec) ((msec) * 1000) | |
309 | #define MS_TO_NS(msec) ((msec) * 1000 * 1000) | |
e40b1127 | 310 | |
d8b4b582 DH |
311 | void ir_raw_event_handle(struct rc_dev *dev); |
312 | int ir_raw_event_store(struct rc_dev *dev, struct ir_raw_event *ev); | |
313 | int ir_raw_event_store_edge(struct rc_dev *dev, enum raw_event_type type); | |
314 | int ir_raw_event_store_with_filter(struct rc_dev *dev, | |
4a702ebf | 315 | struct ir_raw_event *ev); |
d8b4b582 | 316 | void ir_raw_event_set_idle(struct rc_dev *dev, bool idle); |
3875233d JH |
317 | int ir_raw_encode_scancode(enum rc_type protocol, u32 scancode, |
318 | struct ir_raw_event *events, unsigned int max); | |
4a702ebf | 319 | |
d8b4b582 | 320 | static inline void ir_raw_event_reset(struct rc_dev *dev) |
e40b1127 | 321 | { |
5f61ff86 | 322 | struct ir_raw_event ev = { .reset = true }; |
4651918a | 323 | |
d8b4b582 DH |
324 | ir_raw_event_store(dev, &ev); |
325 | ir_raw_event_handle(dev); | |
e40b1127 | 326 | } |
724e2495 | 327 | |
3ffea498 DH |
328 | /* extract mask bits out of data and pack them into the result */ |
329 | static inline u32 ir_extract_bits(u32 data, u32 mask) | |
330 | { | |
331 | u32 vbit = 1, value = 0; | |
332 | ||
333 | do { | |
829ba9fe DH |
334 | if (mask & 1) { |
335 | if (data & 1) | |
336 | value |= vbit; | |
337 | vbit <<= 1; | |
338 | } | |
339 | data >>= 1; | |
3ffea498 DH |
340 | } while (mask >>= 1); |
341 | ||
342 | return value; | |
343 | } | |
344 | ||
ca86674b | 345 | #endif /* _RC_CORE */ |