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 #define SYSFS_PATH_MAX 256 31 #define DNAME_PATH_MAX 256 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" }, 56 { RC_PROTO_IMON, "imon", 0x7fffffff, "imon" }, 57 { RC_PROTO_RCMM12, "rcmm-12", 0x00000fff, "rc-mm" }, 58 { RC_PROTO_RCMM24, "rcmm-24", 0x00ffffff, "rc-mm" }, 59 { RC_PROTO_RCMM32, "rcmm-32", 0xffffffff, "rc-mm" }, 60 }; 61 62 int lirc_open(const char *rc) 63 { 64 struct dirent *dent; 65 char buf[SYSFS_PATH_MAX + DNAME_PATH_MAX]; 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) 83 ksft_exit_skip("cannot find lirc device for %s\n", rc); 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; 147 148 if (rc_proto == RC_PROTO_RCMM32 && 149 (scancode & 0x000c0000) != 0x000c0000 && 150 scancode & 0x00008000) 151 continue; 152 153 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 } 211