| James Hogan | 46b3508 | 2014-02-28 20:29:00 -0300 | [diff] [blame^] | 1 | /* |
| 2 | * ImgTec IR Decoder setup for Sanyo protocol. |
| 3 | * |
| 4 | * Copyright 2012-2014 Imagination Technologies Ltd. |
| 5 | * |
| 6 | * From ir-sanyo-decoder.c: |
| 7 | * |
| 8 | * This protocol uses the NEC protocol timings. However, data is formatted as: |
| 9 | * 13 bits Custom Code |
| 10 | * 13 bits NOT(Custom Code) |
| 11 | * 8 bits Key data |
| 12 | * 8 bits NOT(Key data) |
| 13 | * |
| 14 | * According with LIRC, this protocol is used on Sanyo, Aiwa and Chinon |
| 15 | * Information for this protocol is available at the Sanyo LC7461 datasheet. |
| 16 | */ |
| 17 | |
| 18 | #include "img-ir-hw.h" |
| 19 | |
| 20 | /* Convert Sanyo data to a scancode */ |
| 21 | static int img_ir_sanyo_scancode(int len, u64 raw, int *scancode, u64 protocols) |
| 22 | { |
| 23 | unsigned int addr, addr_inv, data, data_inv; |
| 24 | /* a repeat code has no data */ |
| 25 | if (!len) |
| 26 | return IMG_IR_REPEATCODE; |
| 27 | if (len != 42) |
| 28 | return -EINVAL; |
| 29 | addr = (raw >> 0) & 0x1fff; |
| 30 | addr_inv = (raw >> 13) & 0x1fff; |
| 31 | data = (raw >> 26) & 0xff; |
| 32 | data_inv = (raw >> 34) & 0xff; |
| 33 | /* Validate data */ |
| 34 | if ((data_inv ^ data) != 0xff) |
| 35 | return -EINVAL; |
| 36 | /* Validate address */ |
| 37 | if ((addr_inv ^ addr) != 0x1fff) |
| 38 | return -EINVAL; |
| 39 | |
| 40 | /* Normal Sanyo */ |
| 41 | *scancode = addr << 8 | data; |
| 42 | return IMG_IR_SCANCODE; |
| 43 | } |
| 44 | |
| 45 | /* Convert Sanyo scancode to Sanyo data filter */ |
| 46 | static int img_ir_sanyo_filter(const struct rc_scancode_filter *in, |
| 47 | struct img_ir_filter *out, u64 protocols) |
| 48 | { |
| 49 | unsigned int addr, addr_inv, data, data_inv; |
| 50 | unsigned int addr_m, data_m; |
| 51 | |
| 52 | data = in->data & 0xff; |
| 53 | data_m = in->mask & 0xff; |
| 54 | data_inv = data ^ 0xff; |
| 55 | |
| 56 | if (in->data & 0xff700000) |
| 57 | return -EINVAL; |
| 58 | |
| 59 | addr = (in->data >> 8) & 0x1fff; |
| 60 | addr_m = (in->mask >> 8) & 0x1fff; |
| 61 | addr_inv = addr ^ 0x1fff; |
| 62 | |
| 63 | out->data = (u64)data_inv << 34 | |
| 64 | (u64)data << 26 | |
| 65 | addr_inv << 13 | |
| 66 | addr; |
| 67 | out->mask = (u64)data_m << 34 | |
| 68 | (u64)data_m << 26 | |
| 69 | addr_m << 13 | |
| 70 | addr_m; |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | /* Sanyo decoder */ |
| 75 | struct img_ir_decoder img_ir_sanyo = { |
| 76 | .type = RC_BIT_SANYO, |
| 77 | .control = { |
| 78 | .decoden = 1, |
| 79 | .code_type = IMG_IR_CODETYPE_PULSEDIST, |
| 80 | }, |
| 81 | /* main timings */ |
| 82 | .unit = 562500, /* 562.5 us */ |
| 83 | .timings = { |
| 84 | /* leader symbol */ |
| 85 | .ldr = { |
| 86 | .pulse = { 16 /* 9ms */ }, |
| 87 | .space = { 8 /* 4.5ms */ }, |
| 88 | }, |
| 89 | /* 0 symbol */ |
| 90 | .s00 = { |
| 91 | .pulse = { 1 /* 562.5 us */ }, |
| 92 | .space = { 1 /* 562.5 us */ }, |
| 93 | }, |
| 94 | /* 1 symbol */ |
| 95 | .s01 = { |
| 96 | .pulse = { 1 /* 562.5 us */ }, |
| 97 | .space = { 3 /* 1687.5 us */ }, |
| 98 | }, |
| 99 | /* free time */ |
| 100 | .ft = { |
| 101 | .minlen = 42, |
| 102 | .maxlen = 42, |
| 103 | .ft_min = 10, /* 5.625 ms */ |
| 104 | }, |
| 105 | }, |
| 106 | /* repeat codes */ |
| 107 | .repeat = 108, /* 108 ms */ |
| 108 | .rtimings = { |
| 109 | /* leader symbol */ |
| 110 | .ldr = { |
| 111 | .space = { 4 /* 2.25 ms */ }, |
| 112 | }, |
| 113 | /* free time */ |
| 114 | .ft = { |
| 115 | .minlen = 0, /* repeat code has no data */ |
| 116 | .maxlen = 0, |
| 117 | }, |
| 118 | }, |
| 119 | /* scancode logic */ |
| 120 | .scancode = img_ir_sanyo_scancode, |
| 121 | .filter = img_ir_sanyo_filter, |
| 122 | }; |