Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * ImgTec IR Decoder setup for Philips RC-5 protocol.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright 2012-2014 Imagination Technologies Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include "img-ir-hw.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) /* Convert RC5 data to a scancode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) static int img_ir_rc5_scancode(int len, u64 raw, u64 enabled_protocols,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 				struct img_ir_scancode_req *request)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	unsigned int addr, cmd, tgl, start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	/* Quirk in the decoder shifts everything by 2 to the left. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	raw   >>= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	start	=  (raw >> 13)	& 0x01;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	tgl	=  (raw >> 11)	& 0x01;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	addr	=  (raw >>  6)	& 0x1f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	cmd	=   raw		& 0x3f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	 * 12th bit is used to extend the command in extended RC5 and has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	 * no effect on standard RC5.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	cmd	+= ((raw >> 12) & 0x01) ? 0 : 0x40;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	if (!start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	request->protocol = RC_PROTO_RC5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	request->scancode = addr << 8 | cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	request->toggle   = tgl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	return IMG_IR_SCANCODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /* Convert RC5 scancode to RC5 data filter */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static int img_ir_rc5_filter(const struct rc_scancode_filter *in,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 				 struct img_ir_filter *out, u64 protocols)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	/* Not supported by the hw. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)  * RC-5 decoder
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)  * see http://www.sbprojects.com/knowledge/ir/rc5.php
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct img_ir_decoder img_ir_rc5 = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	.type      = RC_PROTO_BIT_RC5,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	.control   = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 		.bitoriend2	= 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		.code_type	= IMG_IR_CODETYPE_BIPHASE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 		.decodend2	= 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	/* main timings */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	.tolerance	= 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	.unit		= 888888, /* 1/36k*32=888.888microseconds */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	.timings	= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 		/* 10 symbol */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 		.s10 = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 			.pulse	= { 1 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 			.space	= { 1 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 		},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 		/* 11 symbol */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 		.s11 = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 			.pulse	= { 1 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 			.space	= { 1 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 		},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 		/* free time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 		.ft  = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 			.minlen = 14,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 			.maxlen = 14,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 			.ft_min = 5,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 		},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 	/* scancode logic */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 	.scancode	= img_ir_rc5_scancode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 	.filter		= img_ir_rc5_filter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) };