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1 | /* |
2 | * Remote Controller core header |
3 | * |
4 | * Copyright (C) 2009-2010 by Mauro Carvalho Chehab <mchehab@redhat.com> |
5 | * |
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 | |
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> |
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 | |
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 | |
34 | /** |
35 | * struct ir_dev_props - Allow caller drivers to set special properties |
36 | * @driver_type: specifies if the driver or hardware have already a decoder, |
37 | * or if it needs to use the IR raw event decoders to produce a scancode |
38 | * @allowed_protos: bitmask with the supported IR_TYPE_* protocols |
39 | * @scanmask: some hardware decoders are not capable of providing the full |
40 | * scancode to the application. As this is a hardware limit, we can't do |
41 | * anything with it. Yet, as the same keycode table can be used with other |
42 | * devices, a mask is provided to allow its usage. Drivers should generally |
43 | * leave this field in blank |
44 | * @priv: driver-specific data, to be used on the callbacks |
45 | * @change_protocol: allow changing the protocol used on hardware decoders |
46 | * @open: callback to allow drivers to enable polling/irq when IR input device |
47 | * is opened. |
48 | * @close: callback to allow drivers to disable polling/irq when IR input device |
49 | * is opened. |
50 | */ |
51 | struct ir_dev_props { |
52 | enum rc_driver_type driver_type; |
53 | unsigned long allowed_protos; |
54 | u32 scanmask; |
55 | void *priv; |
56 | int (*change_protocol)(void *priv, u64 ir_type); |
57 | int (*open)(void *priv); |
58 | void (*close)(void *priv); |
59 | }; |
60 | |
61 | struct ir_input_dev { |
62 | struct device dev; /* device */ |
63 | char *driver_name; /* Name of the driver module */ |
64 | struct ir_scancode_table rc_tab; /* scan/key table */ |
65 | unsigned long devno; /* device number */ |
66 | const struct ir_dev_props *props; /* Device properties */ |
67 | struct ir_raw_event_ctrl *raw; /* for raw pulse/space events */ |
68 | struct input_dev *input_dev; /* the input device associated with this device */ |
69 | |
70 | /* key info - needed by IR keycode handlers */ |
71 | spinlock_t keylock; /* protects the below members */ |
72 | bool keypressed; /* current state */ |
73 | unsigned long keyup_jiffies; /* when should the current keypress be released? */ |
74 | struct timer_list timer_keyup; /* timer for releasing a keypress */ |
75 | u32 last_keycode; /* keycode of last command */ |
76 | u32 last_scancode; /* scancode of last command */ |
77 | u8 last_toggle; /* toggle of last command */ |
78 | }; |
79 | |
80 | enum raw_event_type { |
81 | IR_SPACE = (1 << 0), |
82 | IR_PULSE = (1 << 1), |
83 | IR_START_EVENT = (1 << 2), |
84 | IR_STOP_EVENT = (1 << 3), |
85 | }; |
86 | |
87 | #define to_ir_input_dev(_attr) container_of(_attr, struct ir_input_dev, attr) |
88 | |
89 | /* From ir-keytable.c */ |
90 | int __ir_input_register(struct input_dev *dev, |
91 | const struct ir_scancode_table *ir_codes, |
92 | const struct ir_dev_props *props, |
93 | const char *driver_name); |
94 | |
95 | static inline int ir_input_register(struct input_dev *dev, |
96 | const char *map_name, |
97 | const struct ir_dev_props *props, |
98 | const char *driver_name) { |
99 | struct ir_scancode_table *ir_codes; |
100 | struct ir_input_dev *ir_dev; |
101 | int rc; |
102 | |
103 | if (!map_name) |
104 | return -EINVAL; |
105 | |
106 | ir_codes = get_rc_map(map_name); |
107 | if (!ir_codes) |
108 | return -EINVAL; |
109 | |
110 | rc = __ir_input_register(dev, ir_codes, props, driver_name); |
111 | if (rc < 0) |
112 | return -EINVAL; |
113 | |
114 | ir_dev = input_get_drvdata(dev); |
115 | |
116 | if (!rc && ir_dev->props && ir_dev->props->change_protocol) |
117 | rc = ir_dev->props->change_protocol(ir_dev->props->priv, |
118 | ir_codes->ir_type); |
119 | |
120 | return rc; |
121 | } |
122 | |
123 | void ir_input_unregister(struct input_dev *input_dev); |
124 | |
125 | void ir_repeat(struct input_dev *dev); |
126 | void ir_keydown(struct input_dev *dev, int scancode, u8 toggle); |
127 | u32 ir_g_keycode_from_table(struct input_dev *input_dev, u32 scancode); |
128 | |
129 | /* From ir-raw-event.c */ |
130 | |
131 | struct ir_raw_event { |
132 | unsigned pulse:1; |
133 | unsigned duration:31; |
134 | }; |
135 | |
136 | #define IR_MAX_DURATION 0x7FFFFFFF /* a bit more than 2 seconds */ |
137 | |
138 | void ir_raw_event_handle(struct input_dev *input_dev); |
139 | int ir_raw_event_store(struct input_dev *input_dev, struct ir_raw_event *ev); |
140 | int ir_raw_event_store_edge(struct input_dev *input_dev, enum raw_event_type type); |
141 | static inline void ir_raw_event_reset(struct input_dev *input_dev) |
142 | { |
143 | struct ir_raw_event ev = { .pulse = false, .duration = 0 }; |
144 | ir_raw_event_store(input_dev, &ev); |
145 | ir_raw_event_handle(input_dev); |
146 | } |
147 | |
148 | #endif /* _IR_CORE */ |
149 |
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