Randy Dunlap | e618630 | 2010-03-10 15:21:56 -0800 | [diff] [blame^] | 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | #include <unistd.h> |
| 4 | #include <fcntl.h> |
| 5 | #include <string.h> |
| 6 | #include <memory.h> |
| 7 | #include <malloc.h> |
| 8 | #include <time.h> |
| 9 | #include <ctype.h> |
| 10 | #include <sys/types.h> |
| 11 | #include <sys/wait.h> |
| 12 | #include <signal.h> |
| 13 | #include <fcntl.h> |
| 14 | #include <errno.h> |
| 15 | #include <sys/time.h> |
| 16 | #include <linux/hpet.h> |
| 17 | |
| 18 | |
| 19 | extern void hpet_open_close(int, const char **); |
| 20 | extern void hpet_info(int, const char **); |
| 21 | extern void hpet_poll(int, const char **); |
| 22 | extern void hpet_fasync(int, const char **); |
| 23 | extern void hpet_read(int, const char **); |
| 24 | |
| 25 | #include <sys/poll.h> |
| 26 | #include <sys/ioctl.h> |
| 27 | #include <signal.h> |
| 28 | |
| 29 | struct hpet_command { |
| 30 | char *command; |
| 31 | void (*func)(int argc, const char ** argv); |
| 32 | } hpet_command[] = { |
| 33 | { |
| 34 | "open-close", |
| 35 | hpet_open_close |
| 36 | }, |
| 37 | { |
| 38 | "info", |
| 39 | hpet_info |
| 40 | }, |
| 41 | { |
| 42 | "poll", |
| 43 | hpet_poll |
| 44 | }, |
| 45 | { |
| 46 | "fasync", |
| 47 | hpet_fasync |
| 48 | }, |
| 49 | }; |
| 50 | |
| 51 | int |
| 52 | main(int argc, const char ** argv) |
| 53 | { |
| 54 | int i; |
| 55 | |
| 56 | argc--; |
| 57 | argv++; |
| 58 | |
| 59 | if (!argc) { |
| 60 | fprintf(stderr, "-hpet: requires command\n"); |
| 61 | return -1; |
| 62 | } |
| 63 | |
| 64 | |
| 65 | for (i = 0; i < (sizeof (hpet_command) / sizeof (hpet_command[0])); i++) |
| 66 | if (!strcmp(argv[0], hpet_command[i].command)) { |
| 67 | argc--; |
| 68 | argv++; |
| 69 | fprintf(stderr, "-hpet: executing %s\n", |
| 70 | hpet_command[i].command); |
| 71 | hpet_command[i].func(argc, argv); |
| 72 | return 0; |
| 73 | } |
| 74 | |
| 75 | fprintf(stderr, "do_hpet: command %s not implemented\n", argv[0]); |
| 76 | |
| 77 | return -1; |
| 78 | } |
| 79 | |
| 80 | void |
| 81 | hpet_open_close(int argc, const char **argv) |
| 82 | { |
| 83 | int fd; |
| 84 | |
| 85 | if (argc != 1) { |
| 86 | fprintf(stderr, "hpet_open_close: device-name\n"); |
| 87 | return; |
| 88 | } |
| 89 | |
| 90 | fd = open(argv[0], O_RDONLY); |
| 91 | if (fd < 0) |
| 92 | fprintf(stderr, "hpet_open_close: open failed\n"); |
| 93 | else |
| 94 | close(fd); |
| 95 | |
| 96 | return; |
| 97 | } |
| 98 | |
| 99 | void |
| 100 | hpet_info(int argc, const char **argv) |
| 101 | { |
| 102 | } |
| 103 | |
| 104 | void |
| 105 | hpet_poll(int argc, const char **argv) |
| 106 | { |
| 107 | unsigned long freq; |
| 108 | int iterations, i, fd; |
| 109 | struct pollfd pfd; |
| 110 | struct hpet_info info; |
| 111 | struct timeval stv, etv; |
| 112 | struct timezone tz; |
| 113 | long usec; |
| 114 | |
| 115 | if (argc != 3) { |
| 116 | fprintf(stderr, "hpet_poll: device-name freq iterations\n"); |
| 117 | return; |
| 118 | } |
| 119 | |
| 120 | freq = atoi(argv[1]); |
| 121 | iterations = atoi(argv[2]); |
| 122 | |
| 123 | fd = open(argv[0], O_RDONLY); |
| 124 | |
| 125 | if (fd < 0) { |
| 126 | fprintf(stderr, "hpet_poll: open of %s failed\n", argv[0]); |
| 127 | return; |
| 128 | } |
| 129 | |
| 130 | if (ioctl(fd, HPET_IRQFREQ, freq) < 0) { |
| 131 | fprintf(stderr, "hpet_poll: HPET_IRQFREQ failed\n"); |
| 132 | goto out; |
| 133 | } |
| 134 | |
| 135 | if (ioctl(fd, HPET_INFO, &info) < 0) { |
| 136 | fprintf(stderr, "hpet_poll: failed to get info\n"); |
| 137 | goto out; |
| 138 | } |
| 139 | |
| 140 | fprintf(stderr, "hpet_poll: info.hi_flags 0x%lx\n", info.hi_flags); |
| 141 | |
| 142 | if (info.hi_flags && (ioctl(fd, HPET_EPI, 0) < 0)) { |
| 143 | fprintf(stderr, "hpet_poll: HPET_EPI failed\n"); |
| 144 | goto out; |
| 145 | } |
| 146 | |
| 147 | if (ioctl(fd, HPET_IE_ON, 0) < 0) { |
| 148 | fprintf(stderr, "hpet_poll, HPET_IE_ON failed\n"); |
| 149 | goto out; |
| 150 | } |
| 151 | |
| 152 | pfd.fd = fd; |
| 153 | pfd.events = POLLIN; |
| 154 | |
| 155 | for (i = 0; i < iterations; i++) { |
| 156 | pfd.revents = 0; |
| 157 | gettimeofday(&stv, &tz); |
| 158 | if (poll(&pfd, 1, -1) < 0) |
| 159 | fprintf(stderr, "hpet_poll: poll failed\n"); |
| 160 | else { |
| 161 | long data; |
| 162 | |
| 163 | gettimeofday(&etv, &tz); |
| 164 | usec = stv.tv_sec * 1000000 + stv.tv_usec; |
| 165 | usec = (etv.tv_sec * 1000000 + etv.tv_usec) - usec; |
| 166 | |
| 167 | fprintf(stderr, |
| 168 | "hpet_poll: expired time = 0x%lx\n", usec); |
| 169 | |
| 170 | fprintf(stderr, "hpet_poll: revents = 0x%x\n", |
| 171 | pfd.revents); |
| 172 | |
| 173 | if (read(fd, &data, sizeof(data)) != sizeof(data)) { |
| 174 | fprintf(stderr, "hpet_poll: read failed\n"); |
| 175 | } |
| 176 | else |
| 177 | fprintf(stderr, "hpet_poll: data 0x%lx\n", |
| 178 | data); |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | out: |
| 183 | close(fd); |
| 184 | return; |
| 185 | } |
| 186 | |
| 187 | static int hpet_sigio_count; |
| 188 | |
| 189 | static void |
| 190 | hpet_sigio(int val) |
| 191 | { |
| 192 | fprintf(stderr, "hpet_sigio: called\n"); |
| 193 | hpet_sigio_count++; |
| 194 | } |
| 195 | |
| 196 | void |
| 197 | hpet_fasync(int argc, const char **argv) |
| 198 | { |
| 199 | unsigned long freq; |
| 200 | int iterations, i, fd, value; |
| 201 | sig_t oldsig; |
| 202 | struct hpet_info info; |
| 203 | |
| 204 | hpet_sigio_count = 0; |
| 205 | fd = -1; |
| 206 | |
| 207 | if ((oldsig = signal(SIGIO, hpet_sigio)) == SIG_ERR) { |
| 208 | fprintf(stderr, "hpet_fasync: failed to set signal handler\n"); |
| 209 | return; |
| 210 | } |
| 211 | |
| 212 | if (argc != 3) { |
| 213 | fprintf(stderr, "hpet_fasync: device-name freq iterations\n"); |
| 214 | goto out; |
| 215 | } |
| 216 | |
| 217 | fd = open(argv[0], O_RDONLY); |
| 218 | |
| 219 | if (fd < 0) { |
| 220 | fprintf(stderr, "hpet_fasync: failed to open %s\n", argv[0]); |
| 221 | return; |
| 222 | } |
| 223 | |
| 224 | |
| 225 | if ((fcntl(fd, F_SETOWN, getpid()) == 1) || |
| 226 | ((value = fcntl(fd, F_GETFL)) == 1) || |
| 227 | (fcntl(fd, F_SETFL, value | O_ASYNC) == 1)) { |
| 228 | fprintf(stderr, "hpet_fasync: fcntl failed\n"); |
| 229 | goto out; |
| 230 | } |
| 231 | |
| 232 | freq = atoi(argv[1]); |
| 233 | iterations = atoi(argv[2]); |
| 234 | |
| 235 | if (ioctl(fd, HPET_IRQFREQ, freq) < 0) { |
| 236 | fprintf(stderr, "hpet_fasync: HPET_IRQFREQ failed\n"); |
| 237 | goto out; |
| 238 | } |
| 239 | |
| 240 | if (ioctl(fd, HPET_INFO, &info) < 0) { |
| 241 | fprintf(stderr, "hpet_fasync: failed to get info\n"); |
| 242 | goto out; |
| 243 | } |
| 244 | |
| 245 | fprintf(stderr, "hpet_fasync: info.hi_flags 0x%lx\n", info.hi_flags); |
| 246 | |
| 247 | if (info.hi_flags && (ioctl(fd, HPET_EPI, 0) < 0)) { |
| 248 | fprintf(stderr, "hpet_fasync: HPET_EPI failed\n"); |
| 249 | goto out; |
| 250 | } |
| 251 | |
| 252 | if (ioctl(fd, HPET_IE_ON, 0) < 0) { |
| 253 | fprintf(stderr, "hpet_fasync, HPET_IE_ON failed\n"); |
| 254 | goto out; |
| 255 | } |
| 256 | |
| 257 | for (i = 0; i < iterations; i++) { |
| 258 | (void) pause(); |
| 259 | fprintf(stderr, "hpet_fasync: count = %d\n", hpet_sigio_count); |
| 260 | } |
| 261 | |
| 262 | out: |
| 263 | signal(SIGIO, oldsig); |
| 264 | |
| 265 | if (fd >= 0) |
| 266 | close(fd); |
| 267 | |
| 268 | return; |
| 269 | } |