diff options
Diffstat (limited to 'drivers/media/IR/ir-jvc-decoder.c')
-rw-r--r-- | drivers/media/IR/ir-jvc-decoder.c | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/drivers/media/IR/ir-jvc-decoder.c b/drivers/media/IR/ir-jvc-decoder.c deleted file mode 100644 index 77a89c4de014..000000000000 --- a/drivers/media/IR/ir-jvc-decoder.c +++ /dev/null | |||
@@ -1,198 +0,0 @@ | |||
1 | /* ir-jvc-decoder.c - handle JVC IR Pulse/Space protocol | ||
2 | * | ||
3 | * Copyright (C) 2010 by David Härdeman <david@hardeman.nu> | ||
4 | * | ||
5 | * This program is free software; you can redistribute it and/or modify | ||
6 | * it under the terms of the GNU General Public License as published by | ||
7 | * the Free Software Foundation version 2 of the License. | ||
8 | * | ||
9 | * This program is distributed in the hope that it will be useful, | ||
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
12 | * GNU General Public License for more details. | ||
13 | */ | ||
14 | |||
15 | #include <linux/bitrev.h> | ||
16 | #include "ir-core-priv.h" | ||
17 | |||
18 | #define JVC_NBITS 16 /* dev(8) + func(8) */ | ||
19 | #define JVC_UNIT 525000 /* ns */ | ||
20 | #define JVC_HEADER_PULSE (16 * JVC_UNIT) /* lack of header -> repeat */ | ||
21 | #define JVC_HEADER_SPACE (8 * JVC_UNIT) | ||
22 | #define JVC_BIT_PULSE (1 * JVC_UNIT) | ||
23 | #define JVC_BIT_0_SPACE (1 * JVC_UNIT) | ||
24 | #define JVC_BIT_1_SPACE (3 * JVC_UNIT) | ||
25 | #define JVC_TRAILER_PULSE (1 * JVC_UNIT) | ||
26 | #define JVC_TRAILER_SPACE (35 * JVC_UNIT) | ||
27 | |||
28 | enum jvc_state { | ||
29 | STATE_INACTIVE, | ||
30 | STATE_HEADER_SPACE, | ||
31 | STATE_BIT_PULSE, | ||
32 | STATE_BIT_SPACE, | ||
33 | STATE_TRAILER_PULSE, | ||
34 | STATE_TRAILER_SPACE, | ||
35 | STATE_CHECK_REPEAT, | ||
36 | }; | ||
37 | |||
38 | /** | ||
39 | * ir_jvc_decode() - Decode one JVC pulse or space | ||
40 | * @input_dev: the struct input_dev descriptor of the device | ||
41 | * @duration: the struct ir_raw_event descriptor of the pulse/space | ||
42 | * | ||
43 | * This function returns -EINVAL if the pulse violates the state machine | ||
44 | */ | ||
45 | static int ir_jvc_decode(struct input_dev *input_dev, struct ir_raw_event ev) | ||
46 | { | ||
47 | struct ir_input_dev *ir_dev = input_get_drvdata(input_dev); | ||
48 | struct jvc_dec *data = &ir_dev->raw->jvc; | ||
49 | |||
50 | if (!(ir_dev->raw->enabled_protocols & IR_TYPE_JVC)) | ||
51 | return 0; | ||
52 | |||
53 | if (IS_RESET(ev)) { | ||
54 | data->state = STATE_INACTIVE; | ||
55 | return 0; | ||
56 | } | ||
57 | |||
58 | if (!geq_margin(ev.duration, JVC_UNIT, JVC_UNIT / 2)) | ||
59 | goto out; | ||
60 | |||
61 | IR_dprintk(2, "JVC decode started at state %d (%uus %s)\n", | ||
62 | data->state, TO_US(ev.duration), TO_STR(ev.pulse)); | ||
63 | |||
64 | again: | ||
65 | switch (data->state) { | ||
66 | |||
67 | case STATE_INACTIVE: | ||
68 | if (!ev.pulse) | ||
69 | break; | ||
70 | |||
71 | if (!eq_margin(ev.duration, JVC_HEADER_PULSE, JVC_UNIT / 2)) | ||
72 | break; | ||
73 | |||
74 | data->count = 0; | ||
75 | data->first = true; | ||
76 | data->toggle = !data->toggle; | ||
77 | data->state = STATE_HEADER_SPACE; | ||
78 | return 0; | ||
79 | |||
80 | case STATE_HEADER_SPACE: | ||
81 | if (ev.pulse) | ||
82 | break; | ||
83 | |||
84 | if (!eq_margin(ev.duration, JVC_HEADER_SPACE, JVC_UNIT / 2)) | ||
85 | break; | ||
86 | |||
87 | data->state = STATE_BIT_PULSE; | ||
88 | return 0; | ||
89 | |||
90 | case STATE_BIT_PULSE: | ||
91 | if (!ev.pulse) | ||
92 | break; | ||
93 | |||
94 | if (!eq_margin(ev.duration, JVC_BIT_PULSE, JVC_UNIT / 2)) | ||
95 | break; | ||
96 | |||
97 | data->state = STATE_BIT_SPACE; | ||
98 | return 0; | ||
99 | |||
100 | case STATE_BIT_SPACE: | ||
101 | if (ev.pulse) | ||
102 | break; | ||
103 | |||
104 | data->bits <<= 1; | ||
105 | if (eq_margin(ev.duration, JVC_BIT_1_SPACE, JVC_UNIT / 2)) { | ||
106 | data->bits |= 1; | ||
107 | decrease_duration(&ev, JVC_BIT_1_SPACE); | ||
108 | } else if (eq_margin(ev.duration, JVC_BIT_0_SPACE, JVC_UNIT / 2)) | ||
109 | decrease_duration(&ev, JVC_BIT_0_SPACE); | ||
110 | else | ||
111 | break; | ||
112 | data->count++; | ||
113 | |||
114 | if (data->count == JVC_NBITS) | ||
115 | data->state = STATE_TRAILER_PULSE; | ||
116 | else | ||
117 | data->state = STATE_BIT_PULSE; | ||
118 | return 0; | ||
119 | |||
120 | case STATE_TRAILER_PULSE: | ||
121 | if (!ev.pulse) | ||
122 | break; | ||
123 | |||
124 | if (!eq_margin(ev.duration, JVC_TRAILER_PULSE, JVC_UNIT / 2)) | ||
125 | break; | ||
126 | |||
127 | data->state = STATE_TRAILER_SPACE; | ||
128 | return 0; | ||
129 | |||
130 | case STATE_TRAILER_SPACE: | ||
131 | if (ev.pulse) | ||
132 | break; | ||
133 | |||
134 | if (!geq_margin(ev.duration, JVC_TRAILER_SPACE, JVC_UNIT / 2)) | ||
135 | break; | ||
136 | |||
137 | if (data->first) { | ||
138 | u32 scancode; | ||
139 | scancode = (bitrev8((data->bits >> 8) & 0xff) << 8) | | ||
140 | (bitrev8((data->bits >> 0) & 0xff) << 0); | ||
141 | IR_dprintk(1, "JVC scancode 0x%04x\n", scancode); | ||
142 | ir_keydown(input_dev, scancode, data->toggle); | ||
143 | data->first = false; | ||
144 | data->old_bits = data->bits; | ||
145 | } else if (data->bits == data->old_bits) { | ||
146 | IR_dprintk(1, "JVC repeat\n"); | ||
147 | ir_repeat(input_dev); | ||
148 | } else { | ||
149 | IR_dprintk(1, "JVC invalid repeat msg\n"); | ||
150 | break; | ||
151 | } | ||
152 | |||
153 | data->count = 0; | ||
154 | data->state = STATE_CHECK_REPEAT; | ||
155 | return 0; | ||
156 | |||
157 | case STATE_CHECK_REPEAT: | ||
158 | if (!ev.pulse) | ||
159 | break; | ||
160 | |||
161 | if (eq_margin(ev.duration, JVC_HEADER_PULSE, JVC_UNIT / 2)) | ||
162 | data->state = STATE_INACTIVE; | ||
163 | else | ||
164 | data->state = STATE_BIT_PULSE; | ||
165 | goto again; | ||
166 | } | ||
167 | |||
168 | out: | ||
169 | IR_dprintk(1, "JVC decode failed at state %d (%uus %s)\n", | ||
170 | data->state, TO_US(ev.duration), TO_STR(ev.pulse)); | ||
171 | data->state = STATE_INACTIVE; | ||
172 | return -EINVAL; | ||
173 | } | ||
174 | |||
175 | static struct ir_raw_handler jvc_handler = { | ||
176 | .protocols = IR_TYPE_JVC, | ||
177 | .decode = ir_jvc_decode, | ||
178 | }; | ||
179 | |||
180 | static int __init ir_jvc_decode_init(void) | ||
181 | { | ||
182 | ir_raw_handler_register(&jvc_handler); | ||
183 | |||
184 | printk(KERN_INFO "IR JVC protocol handler initialized\n"); | ||
185 | return 0; | ||
186 | } | ||
187 | |||
188 | static void __exit ir_jvc_decode_exit(void) | ||
189 | { | ||
190 | ir_raw_handler_unregister(&jvc_handler); | ||
191 | } | ||
192 | |||
193 | module_init(ir_jvc_decode_init); | ||
194 | module_exit(ir_jvc_decode_exit); | ||
195 | |||
196 | MODULE_LICENSE("GPL"); | ||
197 | MODULE_AUTHOR("David Härdeman <david@hardeman.nu>"); | ||
198 | MODULE_DESCRIPTION("JVC IR protocol decoder"); | ||