1 /* 2 * ImgTec IR Decoder setup for Sanyo protocol. 3 * 4 * Copyright 2012-2014 Imagination Technologies Ltd. 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 the 8 * Free Software Foundation; either version 2 of the License, or (at your 9 * option) any later version. 10 * 11 * From ir-sanyo-decoder.c: 12 * 13 * This protocol uses the NEC protocol timings. However, data is formatted as: 14 * 13 bits Custom Code 15 * 13 bits NOT(Custom Code) 16 * 8 bits Key data 17 * 8 bits NOT(Key data) 18 * 19 * According with LIRC, this protocol is used on Sanyo, Aiwa and Chinon 20 * Information for this protocol is available at the Sanyo LC7461 datasheet. 21 */ 22 23 #include "img-ir-hw.h" 24 25 /* Convert Sanyo data to a scancode */ 26 static int img_ir_sanyo_scancode(int len, u64 raw, u64 enabled_protocols, 27 struct img_ir_scancode_req *request) 28 { 29 unsigned int addr, addr_inv, data, data_inv; 30 /* a repeat code has no data */ 31 if (!len) 32 return IMG_IR_REPEATCODE; 33 if (len != 42) 34 return -EINVAL; 35 addr = (raw >> 0) & 0x1fff; 36 addr_inv = (raw >> 13) & 0x1fff; 37 data = (raw >> 26) & 0xff; 38 data_inv = (raw >> 34) & 0xff; 39 /* Validate data */ 40 if ((data_inv ^ data) != 0xff) 41 return -EINVAL; 42 /* Validate address */ 43 if ((addr_inv ^ addr) != 0x1fff) 44 return -EINVAL; 45 46 /* Normal Sanyo */ 47 request->protocol = RC_TYPE_SANYO; 48 request->scancode = addr << 8 | data; 49 return IMG_IR_SCANCODE; 50 } 51 52 /* Convert Sanyo scancode to Sanyo data filter */ 53 static int img_ir_sanyo_filter(const struct rc_scancode_filter *in, 54 struct img_ir_filter *out, u64 protocols) 55 { 56 unsigned int addr, addr_inv, data, data_inv; 57 unsigned int addr_m, data_m; 58 59 data = in->data & 0xff; 60 data_m = in->mask & 0xff; 61 data_inv = data ^ 0xff; 62 63 if (in->data & 0xff700000) 64 return -EINVAL; 65 66 addr = (in->data >> 8) & 0x1fff; 67 addr_m = (in->mask >> 8) & 0x1fff; 68 addr_inv = addr ^ 0x1fff; 69 70 out->data = (u64)data_inv << 34 | 71 (u64)data << 26 | 72 addr_inv << 13 | 73 addr; 74 out->mask = (u64)data_m << 34 | 75 (u64)data_m << 26 | 76 addr_m << 13 | 77 addr_m; 78 return 0; 79 } 80 81 /* Sanyo decoder */ 82 struct img_ir_decoder img_ir_sanyo = { 83 .type = RC_BIT_SANYO, 84 .control = { 85 .decoden = 1, 86 .code_type = IMG_IR_CODETYPE_PULSEDIST, 87 }, 88 /* main timings */ 89 .unit = 562500, /* 562.5 us */ 90 .timings = { 91 /* leader symbol */ 92 .ldr = { 93 .pulse = { 16 /* 9ms */ }, 94 .space = { 8 /* 4.5ms */ }, 95 }, 96 /* 0 symbol */ 97 .s00 = { 98 .pulse = { 1 /* 562.5 us */ }, 99 .space = { 1 /* 562.5 us */ }, 100 }, 101 /* 1 symbol */ 102 .s01 = { 103 .pulse = { 1 /* 562.5 us */ }, 104 .space = { 3 /* 1687.5 us */ }, 105 }, 106 /* free time */ 107 .ft = { 108 .minlen = 42, 109 .maxlen = 42, 110 .ft_min = 10, /* 5.625 ms */ 111 }, 112 }, 113 /* repeat codes */ 114 .repeat = 108, /* 108 ms */ 115 .rtimings = { 116 /* leader symbol */ 117 .ldr = { 118 .space = { 4 /* 2.25 ms */ }, 119 }, 120 /* free time */ 121 .ft = { 122 .minlen = 0, /* repeat code has no data */ 123 .maxlen = 0, 124 }, 125 }, 126 /* scancode logic */ 127 .scancode = img_ir_sanyo_scancode, 128 .filter = img_ir_sanyo_filter, 129 }; 130