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446e4a64 MCC |
1 | /* |
2 | * Remote Controller core header | |
3 | * | |
995187be MCC |
4 | * Copyright (C) 2009-2010 by Mauro Carvalho Chehab <mchehab@redhat.com> |
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 | ||
16 | #ifndef _IR_CORE | |
17 | #define _IR_CORE | |
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 MCC |
24 | |
25 | extern int ir_core_debug; | |
26 | #define IR_dprintk(level, fmt, arg...) if (ir_core_debug >= level) \ | |
27 | printk(KERN_DEBUG "%s: " fmt , __func__, ## arg) | |
28 | ||
626cf697 MCC |
29 | enum rc_driver_type { |
30 | RC_DRIVER_SCANCODE = 0, /* Driver or hardware generates a scancode */ | |
31 | RC_DRIVER_IR_RAW, /* Needs a Infra-Red pulse/space decoder */ | |
32 | }; | |
33 | ||
a3572c34 MCC |
34 | enum raw_event_type { |
35 | IR_SPACE = (1 << 0), | |
36 | IR_PULSE = (1 << 1), | |
37 | IR_START_EVENT = (1 << 2), | |
38 | IR_STOP_EVENT = (1 << 3), | |
39 | }; | |
40 | ||
9dfe4e83 MCC |
41 | /** |
42 | * struct ir_dev_props - Allow caller drivers to set special properties | |
626cf697 MCC |
43 | * @driver_type: specifies if the driver or hardware have already a decoder, |
44 | * or if it needs to use the IR raw event decoders to produce a scancode | |
9dfe4e83 MCC |
45 | * @allowed_protos: bitmask with the supported IR_TYPE_* protocols |
46 | * @scanmask: some hardware decoders are not capable of providing the full | |
47 | * scancode to the application. As this is a hardware limit, we can't do | |
48 | * anything with it. Yet, as the same keycode table can be used with other | |
49 | * devices, a mask is provided to allow its usage. Drivers should generally | |
50 | * leave this field in blank | |
51 | * @priv: driver-specific data, to be used on the callbacks | |
52 | * @change_protocol: allow changing the protocol used on hardware decoders | |
53 | * @open: callback to allow drivers to enable polling/irq when IR input device | |
54 | * is opened. | |
55 | * @close: callback to allow drivers to disable polling/irq when IR input device | |
56 | * is opened. | |
57 | */ | |
e93854da | 58 | struct ir_dev_props { |
626cf697 MCC |
59 | enum rc_driver_type driver_type; |
60 | unsigned long allowed_protos; | |
61 | u32 scanmask; | |
62 | void *priv; | |
63 | int (*change_protocol)(void *priv, u64 ir_type); | |
64 | int (*open)(void *priv); | |
65 | void (*close)(void *priv); | |
e93854da MCC |
66 | }; |
67 | ||
a3572c34 | 68 | struct ir_raw_event_ctrl { |
724e2495 DH |
69 | struct work_struct rx_work; /* for the rx decoding workqueue */ |
70 | struct kfifo kfifo; /* fifo for the pulse/space durations */ | |
71 | ktime_t last_event; /* when last event occurred */ | |
72 | enum raw_event_type last_type; /* last event type */ | |
73 | struct input_dev *input_dev; /* pointer to the parent input_dev */ | |
a3572c34 | 74 | }; |
53f87022 | 75 | |
75543cce | 76 | struct ir_input_dev { |
945cdfa2 | 77 | struct device dev; /* device */ |
727e625c | 78 | char *driver_name; /* Name of the driver module */ |
4714eda8 MCC |
79 | struct ir_scancode_table rc_tab; /* scan/key table */ |
80 | unsigned long devno; /* device number */ | |
e93854da | 81 | const struct ir_dev_props *props; /* Device properties */ |
a3572c34 | 82 | struct ir_raw_event_ctrl *raw; /* for raw pulse/space events */ |
a374fef4 | 83 | struct input_dev *input_dev; /* the input device associated with this device */ |
6660de56 MCC |
84 | |
85 | /* key info - needed by IR keycode handlers */ | |
a374fef4 DH |
86 | spinlock_t keylock; /* protects the below members */ |
87 | bool keypressed; /* current state */ | |
88 | unsigned long keyup_jiffies; /* when should the current keypress be released? */ | |
89 | struct timer_list timer_keyup; /* timer for releasing a keypress */ | |
90 | u32 last_keycode; /* keycode of last command */ | |
91 | u32 last_scancode; /* scancode of last command */ | |
92 | u8 last_toggle; /* toggle of last command */ | |
75543cce | 93 | }; |
a3572c34 | 94 | |
995187be MCC |
95 | struct ir_raw_handler { |
96 | struct list_head list; | |
97 | ||
724e2495 | 98 | int (*decode)(struct input_dev *input_dev, s64 duration); |
93c312ff MCC |
99 | int (*raw_register)(struct input_dev *input_dev); |
100 | int (*raw_unregister)(struct input_dev *input_dev); | |
995187be MCC |
101 | }; |
102 | ||
53f87022 | 103 | #define to_ir_input_dev(_attr) container_of(_attr, struct ir_input_dev, attr) |
75543cce | 104 | |
446e4a64 MCC |
105 | /* Routines from ir-keytable.c */ |
106 | ||
107 | u32 ir_g_keycode_from_table(struct input_dev *input_dev, | |
108 | u32 scancode); | |
a374fef4 DH |
109 | void ir_repeat(struct input_dev *dev); |
110 | void ir_keydown(struct input_dev *dev, int scancode, u8 toggle); | |
b2245ba1 | 111 | int __ir_input_register(struct input_dev *dev, |
e93854da | 112 | const struct ir_scancode_table *ir_codes, |
727e625c MCC |
113 | const struct ir_dev_props *props, |
114 | const char *driver_name); | |
446e4a64 | 115 | |
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116 | static inline int ir_input_register(struct input_dev *dev, |
117 | const char *map_name, | |
118 | const struct ir_dev_props *props, | |
119 | const char *driver_name) { | |
120 | struct ir_scancode_table *ir_codes; | |
02858eed MCC |
121 | struct ir_input_dev *ir_dev; |
122 | int rc; | |
123 | ||
124 | if (!map_name) | |
125 | return -EINVAL; | |
9ce50c1a | 126 | |
b2245ba1 MCC |
127 | ir_codes = get_rc_map(map_name); |
128 | if (!ir_codes) | |
129 | return -EINVAL; | |
130 | ||
02858eed MCC |
131 | rc = __ir_input_register(dev, ir_codes, props, driver_name); |
132 | if (rc < 0) | |
133 | return -EINVAL; | |
134 | ||
135 | ir_dev = input_get_drvdata(dev); | |
136 | ||
137 | if (!rc && ir_dev->props && ir_dev->props->change_protocol) | |
138 | rc = ir_dev->props->change_protocol(ir_dev->props->priv, | |
139 | ir_codes->ir_type); | |
140 | ||
141 | return rc; | |
b2245ba1 MCC |
142 | } |
143 | ||
02858eed | 144 | void ir_input_unregister(struct input_dev *input_dev); |
9ce50c1a | 145 | |
4714eda8 MCC |
146 | /* Routines from ir-sysfs.c */ |
147 | ||
148 | int ir_register_class(struct input_dev *input_dev); | |
149 | void ir_unregister_class(struct input_dev *input_dev); | |
150 | ||
a3572c34 MCC |
151 | /* Routines from ir-raw-event.c */ |
152 | int ir_raw_event_register(struct input_dev *input_dev); | |
153 | void ir_raw_event_unregister(struct input_dev *input_dev); | |
724e2495 DH |
154 | void ir_raw_event_handle(struct input_dev *input_dev); |
155 | int ir_raw_event_store(struct input_dev *input_dev, s64 duration); | |
156 | int ir_raw_event_store_edge(struct input_dev *input_dev, enum raw_event_type type); | |
157 | static inline void ir_raw_event_reset(struct input_dev *input_dev) | |
158 | { | |
159 | ir_raw_event_store(input_dev, 0); | |
160 | ir_raw_event_handle(input_dev); | |
161 | } | |
995187be MCC |
162 | int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler); |
163 | void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler); | |
995187be | 164 | void ir_raw_init(void); |
a3572c34 | 165 | |
995187be MCC |
166 | /* from ir-nec-decoder.c */ |
167 | #ifdef CONFIG_IR_NEC_DECODER_MODULE | |
168 | #define load_nec_decode() request_module("ir-nec-decoder") | |
169 | #else | |
170 | #define load_nec_decode() 0 | |
446e4a64 | 171 | #endif |
995187be | 172 | |
db1423a6 MCC |
173 | /* from ir-rc5-decoder.c */ |
174 | #ifdef CONFIG_IR_RC5_DECODER_MODULE | |
175 | #define load_rc5_decode() request_module("ir-rc5-decoder") | |
176 | #else | |
177 | #define load_rc5_decode() 0 | |
178 | #endif | |
179 | ||
724e2495 DH |
180 | /* macros for ir decoders */ |
181 | #define PULSE(units) ((units)) | |
182 | #define SPACE(units) (-(units)) | |
183 | #define IS_RESET(duration) ((duration) == 0) | |
184 | #define IS_PULSE(duration) ((duration) > 0) | |
185 | #define IS_SPACE(duration) ((duration) < 0) | |
186 | #define DURATION(duration) (abs((duration))) | |
187 | #define IS_TRANSITION(x, y) ((x) * (y) < 0) | |
188 | #define DECREASE_DURATION(duration, amount) \ | |
189 | do { \ | |
190 | if (IS_SPACE(duration)) \ | |
191 | duration += (amount); \ | |
192 | else if (IS_PULSE(duration)) \ | |
193 | duration -= (amount); \ | |
194 | } while (0) | |
195 | ||
196 | #define TO_UNITS(duration, unit_len) \ | |
197 | ((int)((duration) > 0 ? \ | |
198 | DIV_ROUND_CLOSEST(abs((duration)), (unit_len)) :\ | |
199 | -DIV_ROUND_CLOSEST(abs((duration)), (unit_len)))) | |
200 | #define TO_US(duration) ((int)TO_UNITS(duration, 1000)) | |
201 | ||
995187be | 202 | #endif /* _IR_CORE */ |