1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * ImgTec IR Decoder setup for Sharp protocol.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright 2012-2014 Imagination Technologies Ltd.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include "img-ir-hw.h"
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun /* Convert Sharp data to a scancode */
img_ir_sharp_scancode(int len,u64 raw,u64 enabled_protocols,struct img_ir_scancode_req * request)11*4882a593Smuzhiyun static int img_ir_sharp_scancode(int len, u64 raw, u64 enabled_protocols,
12*4882a593Smuzhiyun struct img_ir_scancode_req *request)
13*4882a593Smuzhiyun {
14*4882a593Smuzhiyun unsigned int addr, cmd, exp, chk;
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun if (len != 15)
17*4882a593Smuzhiyun return -EINVAL;
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun addr = (raw >> 0) & 0x1f;
20*4882a593Smuzhiyun cmd = (raw >> 5) & 0xff;
21*4882a593Smuzhiyun exp = (raw >> 13) & 0x1;
22*4882a593Smuzhiyun chk = (raw >> 14) & 0x1;
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun /* validate data */
25*4882a593Smuzhiyun if (!exp)
26*4882a593Smuzhiyun return -EINVAL;
27*4882a593Smuzhiyun if (chk)
28*4882a593Smuzhiyun /* probably the second half of the message */
29*4882a593Smuzhiyun return -EINVAL;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun request->protocol = RC_PROTO_SHARP;
32*4882a593Smuzhiyun request->scancode = addr << 8 | cmd;
33*4882a593Smuzhiyun return IMG_IR_SCANCODE;
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun /* Convert Sharp scancode to Sharp data filter */
img_ir_sharp_filter(const struct rc_scancode_filter * in,struct img_ir_filter * out,u64 protocols)37*4882a593Smuzhiyun static int img_ir_sharp_filter(const struct rc_scancode_filter *in,
38*4882a593Smuzhiyun struct img_ir_filter *out, u64 protocols)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun unsigned int addr, cmd, exp = 0, chk = 0;
41*4882a593Smuzhiyun unsigned int addr_m, cmd_m, exp_m = 0, chk_m = 0;
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun addr = (in->data >> 8) & 0x1f;
44*4882a593Smuzhiyun addr_m = (in->mask >> 8) & 0x1f;
45*4882a593Smuzhiyun cmd = (in->data >> 0) & 0xff;
46*4882a593Smuzhiyun cmd_m = (in->mask >> 0) & 0xff;
47*4882a593Smuzhiyun if (cmd_m) {
48*4882a593Smuzhiyun /* if filtering commands, we can only match the first part */
49*4882a593Smuzhiyun exp = 1;
50*4882a593Smuzhiyun exp_m = 1;
51*4882a593Smuzhiyun chk = 0;
52*4882a593Smuzhiyun chk_m = 1;
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun out->data = addr |
56*4882a593Smuzhiyun cmd << 5 |
57*4882a593Smuzhiyun exp << 13 |
58*4882a593Smuzhiyun chk << 14;
59*4882a593Smuzhiyun out->mask = addr_m |
60*4882a593Smuzhiyun cmd_m << 5 |
61*4882a593Smuzhiyun exp_m << 13 |
62*4882a593Smuzhiyun chk_m << 14;
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun return 0;
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun /*
68*4882a593Smuzhiyun * Sharp decoder
69*4882a593Smuzhiyun * See also http://www.sbprojects.com/knowledge/ir/sharp.php
70*4882a593Smuzhiyun */
71*4882a593Smuzhiyun struct img_ir_decoder img_ir_sharp = {
72*4882a593Smuzhiyun .type = RC_PROTO_BIT_SHARP,
73*4882a593Smuzhiyun .control = {
74*4882a593Smuzhiyun .decoden = 0,
75*4882a593Smuzhiyun .decodend2 = 1,
76*4882a593Smuzhiyun .code_type = IMG_IR_CODETYPE_PULSEDIST,
77*4882a593Smuzhiyun .d1validsel = 1,
78*4882a593Smuzhiyun },
79*4882a593Smuzhiyun /* main timings */
80*4882a593Smuzhiyun .tolerance = 20, /* 20% */
81*4882a593Smuzhiyun .timings = {
82*4882a593Smuzhiyun /* 0 symbol */
83*4882a593Smuzhiyun .s10 = {
84*4882a593Smuzhiyun .pulse = { 320 /* 320 us */ },
85*4882a593Smuzhiyun .space = { 680 /* 1 ms period */ },
86*4882a593Smuzhiyun },
87*4882a593Smuzhiyun /* 1 symbol */
88*4882a593Smuzhiyun .s11 = {
89*4882a593Smuzhiyun .pulse = { 320 /* 320 us */ },
90*4882a593Smuzhiyun .space = { 1680 /* 2 ms period */ },
91*4882a593Smuzhiyun },
92*4882a593Smuzhiyun /* free time */
93*4882a593Smuzhiyun .ft = {
94*4882a593Smuzhiyun .minlen = 15,
95*4882a593Smuzhiyun .maxlen = 15,
96*4882a593Smuzhiyun .ft_min = 5000, /* 5 ms */
97*4882a593Smuzhiyun },
98*4882a593Smuzhiyun },
99*4882a593Smuzhiyun /* scancode logic */
100*4882a593Smuzhiyun .scancode = img_ir_sharp_scancode,
101*4882a593Smuzhiyun .filter = img_ir_sharp_filter,
102*4882a593Smuzhiyun };
103