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 */ 15120703f9SDavid Härdeman static int img_ir_sony_scancode(int len, u64 raw, enum rc_type *protocol, 16120703f9SDavid Härdeman u32 *scancode, u64 enabled_protocols) 17e72b21abSJames Hogan { 18e72b21abSJames Hogan unsigned int dev, subdev, func; 19e72b21abSJames Hogan 20e72b21abSJames Hogan switch (len) { 21e72b21abSJames Hogan case 12: 22120703f9SDavid Härdeman if (!(enabled_protocols & RC_BIT_SONY12)) 23e72b21abSJames Hogan return -EINVAL; 24e72b21abSJames Hogan func = raw & 0x7f; /* first 7 bits */ 25e72b21abSJames Hogan raw >>= 7; 26e72b21abSJames Hogan dev = raw & 0x1f; /* next 5 bits */ 27e72b21abSJames Hogan subdev = 0; 28120703f9SDavid Härdeman *protocol = RC_TYPE_SONY12; 29e72b21abSJames Hogan break; 30e72b21abSJames Hogan case 15: 31120703f9SDavid Härdeman if (!(enabled_protocols & RC_BIT_SONY15)) 32e72b21abSJames Hogan return -EINVAL; 33e72b21abSJames Hogan func = raw & 0x7f; /* first 7 bits */ 34e72b21abSJames Hogan raw >>= 7; 35e72b21abSJames Hogan dev = raw & 0xff; /* next 8 bits */ 36e72b21abSJames Hogan subdev = 0; 37120703f9SDavid Härdeman *protocol = RC_TYPE_SONY15; 38e72b21abSJames Hogan break; 39e72b21abSJames Hogan case 20: 40120703f9SDavid Härdeman if (!(enabled_protocols & RC_BIT_SONY20)) 41e72b21abSJames Hogan return -EINVAL; 42e72b21abSJames Hogan func = raw & 0x7f; /* first 7 bits */ 43e72b21abSJames Hogan raw >>= 7; 44e72b21abSJames Hogan dev = raw & 0x1f; /* next 5 bits */ 45e72b21abSJames Hogan raw >>= 5; 46e72b21abSJames Hogan subdev = raw & 0xff; /* next 8 bits */ 47120703f9SDavid Härdeman *protocol = RC_TYPE_SONY20; 48e72b21abSJames Hogan break; 49e72b21abSJames Hogan default: 50e72b21abSJames Hogan return -EINVAL; 51e72b21abSJames Hogan } 52e72b21abSJames Hogan *scancode = dev << 16 | subdev << 8 | func; 53e72b21abSJames Hogan return IMG_IR_SCANCODE; 54e72b21abSJames Hogan } 55e72b21abSJames Hogan 56e72b21abSJames Hogan /* Convert NEC scancode to NEC data filter */ 57e72b21abSJames Hogan static int img_ir_sony_filter(const struct rc_scancode_filter *in, 58e72b21abSJames Hogan struct img_ir_filter *out, u64 protocols) 59e72b21abSJames Hogan { 60e72b21abSJames Hogan unsigned int dev, subdev, func; 61e72b21abSJames Hogan unsigned int dev_m, subdev_m, func_m; 62e72b21abSJames Hogan unsigned int len = 0; 63e72b21abSJames Hogan 64e72b21abSJames Hogan dev = (in->data >> 16) & 0xff; 65e72b21abSJames Hogan dev_m = (in->mask >> 16) & 0xff; 66e72b21abSJames Hogan subdev = (in->data >> 8) & 0xff; 67e72b21abSJames Hogan subdev_m = (in->mask >> 8) & 0xff; 68e72b21abSJames Hogan func = (in->data >> 0) & 0x7f; 69e72b21abSJames Hogan func_m = (in->mask >> 0) & 0x7f; 70e72b21abSJames Hogan 71e72b21abSJames Hogan if (subdev & subdev_m) { 72e72b21abSJames Hogan /* can't encode subdev and higher device bits */ 73e72b21abSJames Hogan if (dev & dev_m & 0xe0) 74e72b21abSJames Hogan return -EINVAL; 75e72b21abSJames Hogan /* subdevice (extended) bits only in 20 bit encoding */ 76e72b21abSJames Hogan if (!(protocols & RC_BIT_SONY20)) 77e72b21abSJames Hogan return -EINVAL; 78e72b21abSJames Hogan len = 20; 79e72b21abSJames Hogan dev_m &= 0x1f; 80e72b21abSJames Hogan } else if (dev & dev_m & 0xe0) { 81e72b21abSJames Hogan /* upper device bits only in 15 bit encoding */ 82e72b21abSJames Hogan if (!(protocols & RC_BIT_SONY15)) 83e72b21abSJames Hogan return -EINVAL; 84e72b21abSJames Hogan len = 15; 85e72b21abSJames Hogan subdev_m = 0; 86e72b21abSJames Hogan } else { 87e72b21abSJames Hogan /* 88e72b21abSJames Hogan * The hardware mask cannot distinguish high device bits and low 89e72b21abSJames Hogan * extended bits, so logically AND those bits of the masks 90e72b21abSJames Hogan * together. 91e72b21abSJames Hogan */ 92e72b21abSJames Hogan subdev_m &= (dev_m >> 5) | 0xf8; 93e72b21abSJames Hogan dev_m &= 0x1f; 94e72b21abSJames Hogan } 95e72b21abSJames Hogan 96e72b21abSJames Hogan /* ensure there aren't any bits straying between fields */ 97e72b21abSJames Hogan dev &= dev_m; 98e72b21abSJames Hogan subdev &= subdev_m; 99e72b21abSJames Hogan 100e72b21abSJames Hogan /* write the hardware filter */ 101e72b21abSJames Hogan out->data = func | 102e72b21abSJames Hogan dev << 7 | 103e72b21abSJames Hogan subdev << 15; 104e72b21abSJames Hogan out->mask = func_m | 105e72b21abSJames Hogan dev_m << 7 | 106e72b21abSJames Hogan subdev_m << 15; 107e72b21abSJames Hogan 108e72b21abSJames Hogan if (len) { 109e72b21abSJames Hogan out->minlen = len; 110e72b21abSJames Hogan out->maxlen = len; 111e72b21abSJames Hogan } 112e72b21abSJames Hogan return 0; 113e72b21abSJames Hogan } 114e72b21abSJames Hogan 115e72b21abSJames Hogan /* 116e72b21abSJames Hogan * Sony SIRC decoder 117e72b21abSJames Hogan * See also http://www.sbprojects.com/knowledge/ir/sirc.php 118e72b21abSJames Hogan * http://picprojects.org.uk/projects/sirc/sonysirc.pdf 119e72b21abSJames Hogan */ 120e72b21abSJames Hogan struct img_ir_decoder img_ir_sony = { 121e72b21abSJames Hogan .type = RC_BIT_SONY12 | RC_BIT_SONY15 | RC_BIT_SONY20, 122e72b21abSJames Hogan .control = { 123e72b21abSJames Hogan .decoden = 1, 124e72b21abSJames Hogan .code_type = IMG_IR_CODETYPE_PULSELEN, 125e72b21abSJames Hogan }, 126e72b21abSJames Hogan /* main timings */ 127e72b21abSJames Hogan .unit = 600000, /* 600 us */ 128e72b21abSJames Hogan .timings = { 129e72b21abSJames Hogan /* leader symbol */ 130e72b21abSJames Hogan .ldr = { 131e72b21abSJames Hogan .pulse = { 4 /* 2.4 ms */ }, 132e72b21abSJames Hogan .space = { 1 /* 600 us */ }, 133e72b21abSJames Hogan }, 134e72b21abSJames Hogan /* 0 symbol */ 135e72b21abSJames Hogan .s00 = { 136e72b21abSJames Hogan .pulse = { 1 /* 600 us */ }, 137e72b21abSJames Hogan .space = { 1 /* 600 us */ }, 138e72b21abSJames Hogan }, 139e72b21abSJames Hogan /* 1 symbol */ 140e72b21abSJames Hogan .s01 = { 141e72b21abSJames Hogan .pulse = { 2 /* 1.2 ms */ }, 142e72b21abSJames Hogan .space = { 1 /* 600 us */ }, 143e72b21abSJames Hogan }, 144e72b21abSJames Hogan /* free time */ 145e72b21abSJames Hogan .ft = { 146e72b21abSJames Hogan .minlen = 12, 147e72b21abSJames Hogan .maxlen = 20, 148e72b21abSJames Hogan .ft_min = 10, /* 6 ms */ 149e72b21abSJames Hogan }, 150e72b21abSJames Hogan }, 151e72b21abSJames Hogan /* scancode logic */ 152e72b21abSJames Hogan .scancode = img_ir_sony_scancode, 153e72b21abSJames Hogan .filter = img_ir_sony_filter, 154e72b21abSJames Hogan }; 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