James Hogan | 3c11305 | 2014-02-28 20:28:59 -0300 | [diff] [blame] | 1 | /* |
| 2 | * ImgTec IR Decoder setup for Sharp protocol. |
| 3 | * |
| 4 | * Copyright 2012-2014 Imagination Technologies Ltd. |
James Hogan | 2ac6f63 | 2014-03-26 18:08:33 -0300 | [diff] [blame] | 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. |
James Hogan | 3c11305 | 2014-02-28 20:28:59 -0300 | [diff] [blame] | 10 | */ |
| 11 | |
| 12 | #include "img-ir-hw.h" |
| 13 | |
| 14 | /* Convert Sharp data to a scancode */ |
Sifan Naeem | ab93ce0 | 2014-12-11 17:06:22 -0300 | [diff] [blame] | 15 | static int img_ir_sharp_scancode(int len, u64 raw, u64 enabled_protocols, |
| 16 | struct img_ir_scancode_req *request) |
James Hogan | 3c11305 | 2014-02-28 20:28:59 -0300 | [diff] [blame] | 17 | { |
| 18 | unsigned int addr, cmd, exp, chk; |
| 19 | |
| 20 | if (len != 15) |
| 21 | return -EINVAL; |
| 22 | |
| 23 | addr = (raw >> 0) & 0x1f; |
| 24 | cmd = (raw >> 5) & 0xff; |
| 25 | exp = (raw >> 13) & 0x1; |
| 26 | chk = (raw >> 14) & 0x1; |
| 27 | |
| 28 | /* validate data */ |
| 29 | if (!exp) |
| 30 | return -EINVAL; |
| 31 | if (chk) |
| 32 | /* probably the second half of the message */ |
| 33 | return -EINVAL; |
| 34 | |
Sifan Naeem | ab93ce0 | 2014-12-11 17:06:22 -0300 | [diff] [blame] | 35 | request->protocol = RC_TYPE_SHARP; |
| 36 | request->scancode = addr << 8 | cmd; |
James Hogan | 3c11305 | 2014-02-28 20:28:59 -0300 | [diff] [blame] | 37 | return IMG_IR_SCANCODE; |
| 38 | } |
| 39 | |
| 40 | /* Convert Sharp scancode to Sharp data filter */ |
| 41 | static int img_ir_sharp_filter(const struct rc_scancode_filter *in, |
| 42 | struct img_ir_filter *out, u64 protocols) |
| 43 | { |
| 44 | unsigned int addr, cmd, exp = 0, chk = 0; |
| 45 | unsigned int addr_m, cmd_m, exp_m = 0, chk_m = 0; |
| 46 | |
| 47 | addr = (in->data >> 8) & 0x1f; |
| 48 | addr_m = (in->mask >> 8) & 0x1f; |
| 49 | cmd = (in->data >> 0) & 0xff; |
| 50 | cmd_m = (in->mask >> 0) & 0xff; |
| 51 | if (cmd_m) { |
| 52 | /* if filtering commands, we can only match the first part */ |
| 53 | exp = 1; |
| 54 | exp_m = 1; |
| 55 | chk = 0; |
| 56 | chk_m = 1; |
| 57 | } |
| 58 | |
| 59 | out->data = addr | |
| 60 | cmd << 5 | |
| 61 | exp << 13 | |
| 62 | chk << 14; |
| 63 | out->mask = addr_m | |
| 64 | cmd_m << 5 | |
| 65 | exp_m << 13 | |
| 66 | chk_m << 14; |
| 67 | |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | /* |
| 72 | * Sharp decoder |
| 73 | * See also http://www.sbprojects.com/knowledge/ir/sharp.php |
| 74 | */ |
| 75 | struct img_ir_decoder img_ir_sharp = { |
| 76 | .type = RC_BIT_SHARP, |
| 77 | .control = { |
| 78 | .decoden = 0, |
| 79 | .decodend2 = 1, |
| 80 | .code_type = IMG_IR_CODETYPE_PULSEDIST, |
| 81 | .d1validsel = 1, |
| 82 | }, |
| 83 | /* main timings */ |
| 84 | .tolerance = 20, /* 20% */ |
| 85 | .timings = { |
| 86 | /* 0 symbol */ |
| 87 | .s10 = { |
| 88 | .pulse = { 320 /* 320 us */ }, |
| 89 | .space = { 680 /* 1 ms period */ }, |
| 90 | }, |
| 91 | /* 1 symbol */ |
| 92 | .s11 = { |
| 93 | .pulse = { 320 /* 320 us */ }, |
| 94 | .space = { 1680 /* 2 ms period */ }, |
| 95 | }, |
| 96 | /* free time */ |
| 97 | .ft = { |
| 98 | .minlen = 15, |
| 99 | .maxlen = 15, |
| 100 | .ft_min = 5000, /* 5 ms */ |
| 101 | }, |
| 102 | }, |
| 103 | /* scancode logic */ |
| 104 | .scancode = img_ir_sharp_scancode, |
| 105 | .filter = img_ir_sharp_filter, |
| 106 | }; |