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1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // test ir decoder | |
3 | // | |
4 | // Copyright (C) 2018 Sean Young <sean@mess.org> | |
5 | ||
6 | // When sending LIRC_MODE_SCANCODE, the IR will be encoded. rc-loopback | |
7 | // will send this IR to the receiver side, where we try to read the decoded | |
8 | // IR. Decoding happens in a separate kernel thread, so we will need to | |
9 | // wait until that is scheduled, hence we use poll to check for read | |
10 | // readiness. | |
11 | ||
12 | #include <linux/lirc.h> | |
13 | #include <errno.h> | |
14 | #include <stdio.h> | |
15 | #include <stdlib.h> | |
16 | #include <stdbool.h> | |
17 | #include <string.h> | |
18 | #include <unistd.h> | |
19 | #include <poll.h> | |
20 | #include <time.h> | |
21 | #include <sys/types.h> | |
22 | #include <sys/ioctl.h> | |
23 | #include <dirent.h> | |
24 | #include <sys/stat.h> | |
25 | #include <fcntl.h> | |
26 | #include "../kselftest.h" | |
27 | ||
28 | #define TEST_SCANCODES 10 | |
29 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) | |
ed675ed9 SK |
30 | #define SYSFS_PATH_MAX 256 |
31 | #define DNAME_PATH_MAX 256 | |
e55c884e SY |
32 | |
33 | static const struct { | |
34 | enum rc_proto proto; | |
35 | const char *name; | |
36 | unsigned int mask; | |
37 | const char *decoder; | |
38 | } protocols[] = { | |
39 | { RC_PROTO_RC5, "rc-5", 0x1f7f, "rc-5" }, | |
40 | { RC_PROTO_RC5X_20, "rc-5x-20", 0x1f7f3f, "rc-5" }, | |
41 | { RC_PROTO_RC5_SZ, "rc-5-sz", 0x2fff, "rc-5-sz" }, | |
42 | { RC_PROTO_JVC, "jvc", 0xffff, "jvc" }, | |
43 | { RC_PROTO_SONY12, "sony-12", 0x1f007f, "sony" }, | |
44 | { RC_PROTO_SONY15, "sony-15", 0xff007f, "sony" }, | |
45 | { RC_PROTO_SONY20, "sony-20", 0x1fff7f, "sony" }, | |
46 | { RC_PROTO_NEC, "nec", 0xffff, "nec" }, | |
47 | { RC_PROTO_NECX, "nec-x", 0xffffff, "nec" }, | |
48 | { RC_PROTO_NEC32, "nec-32", 0xffffffff, "nec" }, | |
49 | { RC_PROTO_SANYO, "sanyo", 0x1fffff, "sanyo" }, | |
50 | { RC_PROTO_RC6_0, "rc-6-0", 0xffff, "rc-6" }, | |
51 | { RC_PROTO_RC6_6A_20, "rc-6-6a-20", 0xfffff, "rc-6" }, | |
52 | { RC_PROTO_RC6_6A_24, "rc-6-6a-24", 0xffffff, "rc-6" }, | |
53 | { RC_PROTO_RC6_6A_32, "rc-6-6a-32", 0xffffffff, "rc-6" }, | |
54 | { RC_PROTO_RC6_MCE, "rc-6-mce", 0x00007fff, "rc-6" }, | |
55 | { RC_PROTO_SHARP, "sharp", 0x1fff, "sharp" }, | |
721074b0 PL |
56 | { RC_PROTO_IMON, "imon", 0x7fffffff, "imon" }, |
57 | { RC_PROTO_RCMM12, "rcmm-12", 0x00000fff, "rcmm" }, | |
58 | { RC_PROTO_RCMM24, "rcmm-24", 0x00ffffff, "rcmm" }, | |
59 | { RC_PROTO_RCMM32, "rcmm-32", 0xffffffff, "rcmm" }, | |
e55c884e SY |
60 | }; |
61 | ||
62 | int lirc_open(const char *rc) | |
63 | { | |
64 | struct dirent *dent; | |
ed675ed9 | 65 | char buf[SYSFS_PATH_MAX + DNAME_PATH_MAX]; |
e55c884e SY |
66 | DIR *d; |
67 | int fd; | |
68 | ||
69 | snprintf(buf, sizeof(buf), "/sys/class/rc/%s", rc); | |
70 | ||
71 | d = opendir(buf); | |
72 | if (!d) | |
73 | ksft_exit_fail_msg("cannot open %s: %m\n", buf); | |
74 | ||
75 | while ((dent = readdir(d)) != NULL) { | |
76 | if (!strncmp(dent->d_name, "lirc", 4)) { | |
77 | snprintf(buf, sizeof(buf), "/dev/%s", dent->d_name); | |
78 | break; | |
79 | } | |
80 | } | |
81 | ||
82 | if (!dent) | |
a5180977 | 83 | ksft_exit_skip("cannot find lirc device for %s\n", rc); |
e55c884e SY |
84 | |
85 | closedir(d); | |
86 | ||
87 | fd = open(buf, O_RDWR | O_NONBLOCK); | |
88 | if (fd == -1) | |
89 | ksft_exit_fail_msg("cannot open: %s: %m\n", buf); | |
90 | ||
91 | return fd; | |
92 | } | |
93 | ||
94 | int main(int argc, char **argv) | |
95 | { | |
96 | unsigned int mode; | |
97 | char buf[100]; | |
98 | int rlircfd, wlircfd, protocolfd, i, n; | |
99 | ||
100 | srand(time(NULL)); | |
101 | ||
102 | if (argc != 3) | |
103 | ksft_exit_fail_msg("Usage: %s <write rcN> <read rcN>\n", | |
104 | argv[0]); | |
105 | ||
106 | rlircfd = lirc_open(argv[2]); | |
107 | mode = LIRC_MODE_SCANCODE; | |
108 | if (ioctl(rlircfd, LIRC_SET_REC_MODE, &mode)) | |
109 | ksft_exit_fail_msg("failed to set scancode rec mode %s: %m\n", | |
110 | argv[2]); | |
111 | ||
112 | wlircfd = lirc_open(argv[1]); | |
113 | if (ioctl(wlircfd, LIRC_SET_SEND_MODE, &mode)) | |
114 | ksft_exit_fail_msg("failed to set scancode send mode %s: %m\n", | |
115 | argv[1]); | |
116 | ||
117 | snprintf(buf, sizeof(buf), "/sys/class/rc/%s/protocols", argv[2]); | |
118 | protocolfd = open(buf, O_WRONLY); | |
119 | if (protocolfd == -1) | |
120 | ksft_exit_fail_msg("failed to open %s: %m\n", buf); | |
121 | ||
122 | printf("Sending IR on %s and receiving IR on %s.\n", argv[1], argv[2]); | |
123 | ||
124 | for (i = 0; i < ARRAY_SIZE(protocols); i++) { | |
125 | if (write(protocolfd, protocols[i].decoder, | |
126 | strlen(protocols[i].decoder)) == -1) | |
127 | ksft_exit_fail_msg("failed to set write decoder\n"); | |
128 | ||
129 | printf("Testing protocol %s for decoder %s (%d/%d)...\n", | |
130 | protocols[i].name, protocols[i].decoder, | |
131 | i + 1, (int)ARRAY_SIZE(protocols)); | |
132 | ||
133 | for (n = 0; n < TEST_SCANCODES; n++) { | |
134 | unsigned int scancode = rand() & protocols[i].mask; | |
135 | unsigned int rc_proto = protocols[i].proto; | |
136 | ||
137 | if (rc_proto == RC_PROTO_RC6_MCE) | |
138 | scancode |= 0x800f0000; | |
139 | ||
140 | if (rc_proto == RC_PROTO_NECX && | |
141 | (((scancode >> 16) ^ ~(scancode >> 8)) & 0xff) == 0) | |
142 | continue; | |
143 | ||
144 | if (rc_proto == RC_PROTO_NEC32 && | |
145 | (((scancode >> 8) ^ ~scancode) & 0xff) == 0) | |
146 | continue; | |
147 | ||
721074b0 PL |
148 | if (rc_proto == RC_PROTO_RCMM32 && |
149 | (scancode & 0x000c0000) != 0x000c0000 && | |
150 | scancode & 0x00008000) | |
151 | continue; | |
152 | ||
e55c884e SY |
153 | struct lirc_scancode lsc = { |
154 | .rc_proto = rc_proto, | |
155 | .scancode = scancode | |
156 | }; | |
157 | ||
158 | printf("Testing scancode:%x\n", scancode); | |
159 | ||
160 | while (write(wlircfd, &lsc, sizeof(lsc)) < 0) { | |
161 | if (errno == EINTR) | |
162 | continue; | |
163 | ||
164 | ksft_exit_fail_msg("failed to send ir: %m\n"); | |
165 | } | |
166 | ||
167 | struct pollfd pfd = { .fd = rlircfd, .events = POLLIN }; | |
168 | struct lirc_scancode lsc2; | |
169 | ||
170 | poll(&pfd, 1, 1000); | |
171 | ||
172 | bool decoded = true; | |
173 | ||
174 | while (read(rlircfd, &lsc2, sizeof(lsc2)) < 0) { | |
175 | if (errno == EINTR) | |
176 | continue; | |
177 | ||
178 | ksft_test_result_error("no scancode decoded: %m\n"); | |
179 | decoded = false; | |
180 | break; | |
181 | } | |
182 | ||
183 | if (!decoded) | |
184 | continue; | |
185 | ||
186 | if (lsc.rc_proto != lsc2.rc_proto) | |
187 | ksft_test_result_error("decoded protocol is different: %d\n", | |
188 | lsc2.rc_proto); | |
189 | ||
190 | else if (lsc.scancode != lsc2.scancode) | |
191 | ksft_test_result_error("decoded scancode is different: %llx\n", | |
192 | lsc2.scancode); | |
193 | else | |
194 | ksft_inc_pass_cnt(); | |
195 | } | |
196 | ||
197 | printf("OK\n"); | |
198 | } | |
199 | ||
200 | close(rlircfd); | |
201 | close(wlircfd); | |
202 | close(protocolfd); | |
203 | ||
204 | if (ksft_get_fail_cnt() > 0) | |
205 | ksft_exit_fail(); | |
206 | else | |
207 | ksft_exit_pass(); | |
208 | ||
209 | return 0; | |
210 | } |