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