1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * ImgTec IR Decoder setup for Sanyo protocol. 4 * 5 * Copyright 2012-2014 Imagination Technologies Ltd. 6 * 7 * From ir-sanyo-decoder.c: 8 * 9 * This protocol uses the NEC protocol timings. However, data is formatted as: 10 * 13 bits Custom Code 11 * 13 bits NOT(Custom Code) 12 * 8 bits Key data 13 * 8 bits NOT(Key data) 14 * 15 * According with LIRC, this protocol is used on Sanyo, Aiwa and Chinon 16 * Information for this protocol is available at the Sanyo LC7461 datasheet. 17 */ 18 19 #include "img-ir-hw.h" 20 21 /* Convert Sanyo data to a scancode */ 22 static int img_ir_sanyo_scancode(int len, u64 raw, u64 enabled_protocols, 23 struct img_ir_scancode_req *request) 24 { 25 unsigned int addr, addr_inv, data, data_inv; 26 /* a repeat code has no data */ 27 if (!len) 28 return IMG_IR_REPEATCODE; 29 if (len != 42) 30 return -EINVAL; 31 addr = (raw >> 0) & 0x1fff; 32 addr_inv = (raw >> 13) & 0x1fff; 33 data = (raw >> 26) & 0xff; 34 data_inv = (raw >> 34) & 0xff; 35 /* Validate data */ 36 if ((data_inv ^ data) != 0xff) 37 return -EINVAL; 38 /* Validate address */ 39 if ((addr_inv ^ addr) != 0x1fff) 40 return -EINVAL; 41 42 /* Normal Sanyo */ 43 request->protocol = RC_PROTO_SANYO; 44 request->scancode = addr << 8 | data; 45 return IMG_IR_SCANCODE; 46 } 47 48 /* Convert Sanyo scancode to Sanyo data filter */ 49 static int img_ir_sanyo_filter(const struct rc_scancode_filter *in, 50 struct img_ir_filter *out, u64 protocols) 51 { 52 unsigned int addr, addr_inv, data, data_inv; 53 unsigned int addr_m, data_m; 54 55 data = in->data & 0xff; 56 data_m = in->mask & 0xff; 57 data_inv = data ^ 0xff; 58 59 if (in->data & 0xff700000) 60 return -EINVAL; 61 62 addr = (in->data >> 8) & 0x1fff; 63 addr_m = (in->mask >> 8) & 0x1fff; 64 addr_inv = addr ^ 0x1fff; 65 66 out->data = (u64)data_inv << 34 | 67 (u64)data << 26 | 68 addr_inv << 13 | 69 addr; 70 out->mask = (u64)data_m << 34 | 71 (u64)data_m << 26 | 72 addr_m << 13 | 73 addr_m; 74 return 0; 75 } 76 77 /* Sanyo decoder */ 78 struct img_ir_decoder img_ir_sanyo = { 79 .type = RC_PROTO_BIT_SANYO, 80 .control = { 81 .decoden = 1, 82 .code_type = IMG_IR_CODETYPE_PULSEDIST, 83 }, 84 /* main timings */ 85 .unit = 562500, /* 562.5 us */ 86 .timings = { 87 /* leader symbol */ 88 .ldr = { 89 .pulse = { 16 /* 9ms */ }, 90 .space = { 8 /* 4.5ms */ }, 91 }, 92 /* 0 symbol */ 93 .s00 = { 94 .pulse = { 1 /* 562.5 us */ }, 95 .space = { 1 /* 562.5 us */ }, 96 }, 97 /* 1 symbol */ 98 .s01 = { 99 .pulse = { 1 /* 562.5 us */ }, 100 .space = { 3 /* 1687.5 us */ }, 101 }, 102 /* free time */ 103 .ft = { 104 .minlen = 42, 105 .maxlen = 42, 106 .ft_min = 10, /* 5.625 ms */ 107 }, 108 }, 109 /* repeat codes */ 110 .repeat = 108, /* 108 ms */ 111 .rtimings = { 112 /* leader symbol */ 113 .ldr = { 114 .space = { 4 /* 2.25 ms */ }, 115 }, 116 /* free time */ 117 .ft = { 118 .minlen = 0, /* repeat code has no data */ 119 .maxlen = 0, 120 }, 121 }, 122 /* scancode logic */ 123 .scancode = img_ir_sanyo_scancode, 124 .filter = img_ir_sanyo_filter, 125 }; 126