1e72b21abSJames Hogan /* 2e72b21abSJames Hogan * ImgTec IR Decoder setup for Sony (SIRC) protocol. 3e72b21abSJames Hogan * 4e72b21abSJames Hogan * Copyright 2012-2014 Imagination Technologies Ltd. 52ac6f630SJames Hogan * 62ac6f630SJames Hogan * This program is free software; you can redistribute it and/or modify 72ac6f630SJames Hogan * it under the terms of the GNU General Public License as published by the 82ac6f630SJames Hogan * Free Software Foundation; either version 2 of the License, or (at your 92ac6f630SJames Hogan * option) any later version. 10e72b21abSJames Hogan */ 11e72b21abSJames Hogan 12e72b21abSJames Hogan #include "img-ir-hw.h" 13e72b21abSJames Hogan 14e72b21abSJames Hogan /* Convert Sony data to a scancode */ 15e72b21abSJames Hogan static int img_ir_sony_scancode(int len, u64 raw, int *scancode, u64 protocols) 16e72b21abSJames Hogan { 17e72b21abSJames Hogan unsigned int dev, subdev, func; 18e72b21abSJames Hogan 19e72b21abSJames Hogan switch (len) { 20e72b21abSJames Hogan case 12: 21e72b21abSJames Hogan if (!(protocols & RC_BIT_SONY12)) 22e72b21abSJames Hogan return -EINVAL; 23e72b21abSJames Hogan func = raw & 0x7f; /* first 7 bits */ 24e72b21abSJames Hogan raw >>= 7; 25e72b21abSJames Hogan dev = raw & 0x1f; /* next 5 bits */ 26e72b21abSJames Hogan subdev = 0; 27e72b21abSJames Hogan break; 28e72b21abSJames Hogan case 15: 29e72b21abSJames Hogan if (!(protocols & RC_BIT_SONY15)) 30e72b21abSJames Hogan return -EINVAL; 31e72b21abSJames Hogan func = raw & 0x7f; /* first 7 bits */ 32e72b21abSJames Hogan raw >>= 7; 33e72b21abSJames Hogan dev = raw & 0xff; /* next 8 bits */ 34e72b21abSJames Hogan subdev = 0; 35e72b21abSJames Hogan break; 36e72b21abSJames Hogan case 20: 37e72b21abSJames Hogan if (!(protocols & RC_BIT_SONY20)) 38e72b21abSJames Hogan return -EINVAL; 39e72b21abSJames Hogan func = raw & 0x7f; /* first 7 bits */ 40e72b21abSJames Hogan raw >>= 7; 41e72b21abSJames Hogan dev = raw & 0x1f; /* next 5 bits */ 42e72b21abSJames Hogan raw >>= 5; 43e72b21abSJames Hogan subdev = raw & 0xff; /* next 8 bits */ 44e72b21abSJames Hogan break; 45e72b21abSJames Hogan default: 46e72b21abSJames Hogan return -EINVAL; 47e72b21abSJames Hogan } 48e72b21abSJames Hogan *scancode = dev << 16 | subdev << 8 | func; 49e72b21abSJames Hogan return IMG_IR_SCANCODE; 50e72b21abSJames Hogan } 51e72b21abSJames Hogan 52e72b21abSJames Hogan /* Convert NEC scancode to NEC data filter */ 53e72b21abSJames Hogan static int img_ir_sony_filter(const struct rc_scancode_filter *in, 54e72b21abSJames Hogan struct img_ir_filter *out, u64 protocols) 55e72b21abSJames Hogan { 56e72b21abSJames Hogan unsigned int dev, subdev, func; 57e72b21abSJames Hogan unsigned int dev_m, subdev_m, func_m; 58e72b21abSJames Hogan unsigned int len = 0; 59e72b21abSJames Hogan 60e72b21abSJames Hogan dev = (in->data >> 16) & 0xff; 61e72b21abSJames Hogan dev_m = (in->mask >> 16) & 0xff; 62e72b21abSJames Hogan subdev = (in->data >> 8) & 0xff; 63e72b21abSJames Hogan subdev_m = (in->mask >> 8) & 0xff; 64e72b21abSJames Hogan func = (in->data >> 0) & 0x7f; 65e72b21abSJames Hogan func_m = (in->mask >> 0) & 0x7f; 66e72b21abSJames Hogan 67e72b21abSJames Hogan if (subdev & subdev_m) { 68e72b21abSJames Hogan /* can't encode subdev and higher device bits */ 69e72b21abSJames Hogan if (dev & dev_m & 0xe0) 70e72b21abSJames Hogan return -EINVAL; 71e72b21abSJames Hogan /* subdevice (extended) bits only in 20 bit encoding */ 72e72b21abSJames Hogan if (!(protocols & RC_BIT_SONY20)) 73e72b21abSJames Hogan return -EINVAL; 74e72b21abSJames Hogan len = 20; 75e72b21abSJames Hogan dev_m &= 0x1f; 76e72b21abSJames Hogan } else if (dev & dev_m & 0xe0) { 77e72b21abSJames Hogan /* upper device bits only in 15 bit encoding */ 78e72b21abSJames Hogan if (!(protocols & RC_BIT_SONY15)) 79e72b21abSJames Hogan return -EINVAL; 80e72b21abSJames Hogan len = 15; 81e72b21abSJames Hogan subdev_m = 0; 82e72b21abSJames Hogan } else { 83e72b21abSJames Hogan /* 84e72b21abSJames Hogan * The hardware mask cannot distinguish high device bits and low 85e72b21abSJames Hogan * extended bits, so logically AND those bits of the masks 86e72b21abSJames Hogan * together. 87e72b21abSJames Hogan */ 88e72b21abSJames Hogan subdev_m &= (dev_m >> 5) | 0xf8; 89e72b21abSJames Hogan dev_m &= 0x1f; 90e72b21abSJames Hogan } 91e72b21abSJames Hogan 92e72b21abSJames Hogan /* ensure there aren't any bits straying between fields */ 93e72b21abSJames Hogan dev &= dev_m; 94e72b21abSJames Hogan subdev &= subdev_m; 95e72b21abSJames Hogan 96e72b21abSJames Hogan /* write the hardware filter */ 97e72b21abSJames Hogan out->data = func | 98e72b21abSJames Hogan dev << 7 | 99e72b21abSJames Hogan subdev << 15; 100e72b21abSJames Hogan out->mask = func_m | 101e72b21abSJames Hogan dev_m << 7 | 102e72b21abSJames Hogan subdev_m << 15; 103e72b21abSJames Hogan 104e72b21abSJames Hogan if (len) { 105e72b21abSJames Hogan out->minlen = len; 106e72b21abSJames Hogan out->maxlen = len; 107e72b21abSJames Hogan } 108e72b21abSJames Hogan return 0; 109e72b21abSJames Hogan } 110e72b21abSJames Hogan 111e72b21abSJames Hogan /* 112e72b21abSJames Hogan * Sony SIRC decoder 113e72b21abSJames Hogan * See also http://www.sbprojects.com/knowledge/ir/sirc.php 114e72b21abSJames Hogan * http://picprojects.org.uk/projects/sirc/sonysirc.pdf 115e72b21abSJames Hogan */ 116e72b21abSJames Hogan struct img_ir_decoder img_ir_sony = { 117e72b21abSJames Hogan .type = RC_BIT_SONY12 | RC_BIT_SONY15 | RC_BIT_SONY20, 118e72b21abSJames Hogan .control = { 119e72b21abSJames Hogan .decoden = 1, 120e72b21abSJames Hogan .code_type = IMG_IR_CODETYPE_PULSELEN, 121e72b21abSJames Hogan }, 122e72b21abSJames Hogan /* main timings */ 123e72b21abSJames Hogan .unit = 600000, /* 600 us */ 124e72b21abSJames Hogan .timings = { 125e72b21abSJames Hogan /* leader symbol */ 126e72b21abSJames Hogan .ldr = { 127e72b21abSJames Hogan .pulse = { 4 /* 2.4 ms */ }, 128e72b21abSJames Hogan .space = { 1 /* 600 us */ }, 129e72b21abSJames Hogan }, 130e72b21abSJames Hogan /* 0 symbol */ 131e72b21abSJames Hogan .s00 = { 132e72b21abSJames Hogan .pulse = { 1 /* 600 us */ }, 133e72b21abSJames Hogan .space = { 1 /* 600 us */ }, 134e72b21abSJames Hogan }, 135e72b21abSJames Hogan /* 1 symbol */ 136e72b21abSJames Hogan .s01 = { 137e72b21abSJames Hogan .pulse = { 2 /* 1.2 ms */ }, 138e72b21abSJames Hogan .space = { 1 /* 600 us */ }, 139e72b21abSJames Hogan }, 140e72b21abSJames Hogan /* free time */ 141e72b21abSJames Hogan .ft = { 142e72b21abSJames Hogan .minlen = 12, 143e72b21abSJames Hogan .maxlen = 20, 144e72b21abSJames Hogan .ft_min = 10, /* 6 ms */ 145e72b21abSJames Hogan }, 146e72b21abSJames Hogan }, 147e72b21abSJames Hogan /* scancode logic */ 148e72b21abSJames Hogan .scancode = img_ir_sony_scancode, 149e72b21abSJames Hogan .filter = img_ir_sony_filter, 150e72b21abSJames Hogan }; 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