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 SYSFS_PATH_MAX 256 |
30 | #define DNAME_PATH_MAX 256 |
31 | |
32 | /* |
33 | * Support ancient lirc.h which does not have these values. Can be removed |
34 | * once RHEL 8 is no longer a relevant testing platform. |
35 | */ |
36 | #if RC_PROTO_MAX < 26 |
37 | #define RC_PROTO_RCMM12 24 |
38 | #define RC_PROTO_RCMM24 25 |
39 | #define RC_PROTO_RCMM32 26 |
40 | #endif |
41 | |
42 | static const struct { |
43 | enum rc_proto proto; |
44 | const char *name; |
45 | unsigned int mask; |
46 | const char *decoder; |
47 | } protocols[] = { |
48 | { RC_PROTO_RC5, "rc-5" , 0x1f7f, "rc-5" }, |
49 | { RC_PROTO_RC5X_20, "rc-5x-20" , 0x1f7f3f, "rc-5" }, |
50 | { RC_PROTO_RC5_SZ, "rc-5-sz" , 0x2fff, "rc-5-sz" }, |
51 | { RC_PROTO_JVC, "jvc" , 0xffff, "jvc" }, |
52 | { RC_PROTO_SONY12, "sony-12" , 0x1f007f, "sony" }, |
53 | { RC_PROTO_SONY15, "sony-15" , 0xff007f, "sony" }, |
54 | { RC_PROTO_SONY20, "sony-20" , 0x1fff7f, "sony" }, |
55 | { RC_PROTO_NEC, "nec" , 0xffff, "nec" }, |
56 | { RC_PROTO_NECX, "nec-x" , 0xffffff, "nec" }, |
57 | { RC_PROTO_NEC32, "nec-32" , 0xffffffff, "nec" }, |
58 | { RC_PROTO_SANYO, "sanyo" , 0x1fffff, "sanyo" }, |
59 | { RC_PROTO_RC6_0, "rc-6-0" , 0xffff, "rc-6" }, |
60 | { RC_PROTO_RC6_6A_20, "rc-6-6a-20" , 0xfffff, "rc-6" }, |
61 | { RC_PROTO_RC6_6A_24, "rc-6-6a-24" , 0xffffff, "rc-6" }, |
62 | { RC_PROTO_RC6_6A_32, "rc-6-6a-32" , 0xffffffff, "rc-6" }, |
63 | { RC_PROTO_RC6_MCE, "rc-6-mce" , 0x00007fff, "rc-6" }, |
64 | { RC_PROTO_SHARP, "sharp" , 0x1fff, "sharp" }, |
65 | { RC_PROTO_IMON, "imon" , 0x7fffffff, "imon" }, |
66 | { RC_PROTO_RCMM12, "rcmm-12" , 0x00000fff, "rc-mm" }, |
67 | { RC_PROTO_RCMM24, "rcmm-24" , 0x00ffffff, "rc-mm" }, |
68 | { RC_PROTO_RCMM32, "rcmm-32" , 0xffffffff, "rc-mm" }, |
69 | }; |
70 | |
71 | int lirc_open(const char *rc) |
72 | { |
73 | struct dirent *dent; |
74 | char buf[SYSFS_PATH_MAX + DNAME_PATH_MAX]; |
75 | DIR *d; |
76 | int fd; |
77 | |
78 | snprintf(buf, sizeof(buf), "/sys/class/rc/%s" , rc); |
79 | |
80 | d = opendir(buf); |
81 | if (!d) |
82 | ksft_exit_fail_msg(msg: "cannot open %s: %m\n" , buf); |
83 | |
84 | while ((dent = readdir(d)) != NULL) { |
85 | if (!strncmp(dent->d_name, "lirc" , 4)) { |
86 | snprintf(buf, sizeof(buf), "/dev/%s" , dent->d_name); |
87 | break; |
88 | } |
89 | } |
90 | |
91 | if (!dent) |
92 | ksft_exit_skip(msg: "cannot find lirc device for %s\n" , rc); |
93 | |
94 | closedir(d); |
95 | |
96 | fd = open(buf, O_RDWR | O_NONBLOCK); |
97 | if (fd == -1) |
98 | ksft_exit_fail_msg(msg: "cannot open: %s: %m\n" , buf); |
99 | |
100 | return fd; |
101 | } |
102 | |
103 | int main(int argc, char **argv) |
104 | { |
105 | unsigned int mode; |
106 | char buf[100]; |
107 | int rlircfd, wlircfd, protocolfd, i, n; |
108 | |
109 | srand(time(NULL)); |
110 | |
111 | if (argc != 3) |
112 | ksft_exit_fail_msg(msg: "Usage: %s <write rcN> <read rcN>\n" , |
113 | argv[0]); |
114 | |
115 | rlircfd = lirc_open(rc: argv[2]); |
116 | mode = LIRC_MODE_SCANCODE; |
117 | if (ioctl(rlircfd, LIRC_SET_REC_MODE, &mode)) |
118 | ksft_exit_fail_msg(msg: "failed to set scancode rec mode %s: %m\n" , |
119 | argv[2]); |
120 | |
121 | wlircfd = lirc_open(rc: argv[1]); |
122 | if (ioctl(wlircfd, LIRC_SET_SEND_MODE, &mode)) |
123 | ksft_exit_fail_msg(msg: "failed to set scancode send mode %s: %m\n" , |
124 | argv[1]); |
125 | |
126 | snprintf(buf, sizeof(buf), "/sys/class/rc/%s/protocols" , argv[2]); |
127 | protocolfd = open(buf, O_WRONLY); |
128 | if (protocolfd == -1) |
129 | ksft_exit_fail_msg(msg: "failed to open %s: %m\n" , buf); |
130 | |
131 | printf("Sending IR on %s and receiving IR on %s.\n" , argv[1], argv[2]); |
132 | |
133 | for (i = 0; i < ARRAY_SIZE(protocols); i++) { |
134 | if (write(protocolfd, protocols[i].decoder, |
135 | strlen(protocols[i].decoder)) == -1) |
136 | ksft_exit_fail_msg(msg: "failed to set write decoder\n" ); |
137 | |
138 | printf("Testing protocol %s for decoder %s (%d/%d)...\n" , |
139 | protocols[i].name, protocols[i].decoder, |
140 | i + 1, (int)ARRAY_SIZE(protocols)); |
141 | |
142 | for (n = 0; n < TEST_SCANCODES; n++) { |
143 | unsigned int scancode = rand() & protocols[i].mask; |
144 | unsigned int rc_proto = protocols[i].proto; |
145 | |
146 | if (rc_proto == RC_PROTO_RC6_MCE) |
147 | scancode |= 0x800f0000; |
148 | |
149 | if (rc_proto == RC_PROTO_NECX && |
150 | (((scancode >> 16) ^ ~(scancode >> 8)) & 0xff) == 0) |
151 | continue; |
152 | |
153 | if (rc_proto == RC_PROTO_NEC32 && |
154 | (((scancode >> 8) ^ ~scancode) & 0xff) == 0) |
155 | continue; |
156 | |
157 | if (rc_proto == RC_PROTO_RCMM32 && |
158 | (scancode & 0x000c0000) != 0x000c0000 && |
159 | scancode & 0x00008000) |
160 | continue; |
161 | |
162 | struct lirc_scancode lsc = { |
163 | .rc_proto = rc_proto, |
164 | .scancode = scancode |
165 | }; |
166 | |
167 | printf("Testing scancode:%x\n" , scancode); |
168 | |
169 | while (write(wlircfd, &lsc, sizeof(lsc)) < 0) { |
170 | if (errno == EINTR) |
171 | continue; |
172 | |
173 | ksft_exit_fail_msg(msg: "failed to send ir: %m\n" ); |
174 | } |
175 | |
176 | struct pollfd pfd = { .fd = rlircfd, .events = POLLIN }; |
177 | struct lirc_scancode lsc2; |
178 | |
179 | poll(&pfd, 1, 1000); |
180 | |
181 | bool decoded = true; |
182 | |
183 | while (read(rlircfd, &lsc2, sizeof(lsc2)) < 0) { |
184 | if (errno == EINTR) |
185 | continue; |
186 | |
187 | ksft_test_result_error(msg: "no scancode decoded: %m\n" ); |
188 | decoded = false; |
189 | break; |
190 | } |
191 | |
192 | if (!decoded) |
193 | continue; |
194 | |
195 | if (lsc.rc_proto != lsc2.rc_proto) |
196 | ksft_test_result_error(msg: "decoded protocol is different: %d\n" , |
197 | lsc2.rc_proto); |
198 | |
199 | else if (lsc.scancode != lsc2.scancode) |
200 | ksft_test_result_error(msg: "decoded scancode is different: %llx\n" , |
201 | lsc2.scancode); |
202 | else |
203 | ksft_inc_pass_cnt(); |
204 | } |
205 | |
206 | printf("OK\n" ); |
207 | } |
208 | |
209 | close(rlircfd); |
210 | close(wlircfd); |
211 | close(protocolfd); |
212 | |
213 | if (ksft_get_fail_cnt() > 0) |
214 | ksft_exit_fail(); |
215 | else |
216 | ksft_exit_pass(); |
217 | |
218 | return 0; |
219 | } |
220 | |