1 // SPDX-License-Identifier: GPL-2.0
2 #include <stdio.h>
3 #include <stdlib.h>
4 #include <unistd.h>
5 #include <fcntl.h>
6 #include <string.h>
7 #include <memory.h>
8 #include <malloc.h>
9 #include <time.h>
10 #include <ctype.h>
11 #include <sys/types.h>
12 #include <sys/wait.h>
13 #include <signal.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
28 struct hpet_command {
29 char *command;
30 void (*func)(int argc, const char ** argv);
31 } hpet_command[] = {
32 {
33 "open-close",
34 hpet_open_close
35 },
36 {
37 "info",
38 hpet_info
39 },
40 {
41 "poll",
42 hpet_poll
43 },
44 {
45 "fasync",
46 hpet_fasync
47 },
48 };
49
50 int
main(int argc,const char ** argv)51 main(int argc, const char ** argv)
52 {
53 unsigned int i;
54
55 argc--;
56 argv++;
57
58 if (!argc) {
59 fprintf(stderr, "-hpet: requires command\n");
60 return -1;
61 }
62
63
64 for (i = 0; i < (sizeof (hpet_command) / sizeof (hpet_command[0])); i++)
65 if (!strcmp(argv[0], hpet_command[i].command)) {
66 argc--;
67 argv++;
68 fprintf(stderr, "-hpet: executing %s\n",
69 hpet_command[i].command);
70 hpet_command[i].func(argc, argv);
71 return 0;
72 }
73
74 fprintf(stderr, "do_hpet: command %s not implemented\n", argv[0]);
75
76 return -1;
77 }
78
79 void
hpet_open_close(int argc,const char ** argv)80 hpet_open_close(int argc, const char **argv)
81 {
82 int fd;
83
84 if (argc != 1) {
85 fprintf(stderr, "hpet_open_close: device-name\n");
86 return;
87 }
88
89 fd = open(argv[0], O_RDONLY);
90 if (fd < 0)
91 fprintf(stderr, "hpet_open_close: open failed\n");
92 else
93 close(fd);
94
95 return;
96 }
97
98 void
hpet_info(int argc,const char ** argv)99 hpet_info(int argc, const char **argv)
100 {
101 struct hpet_info info;
102 int fd;
103
104 if (argc != 1) {
105 fprintf(stderr, "hpet_info: device-name\n");
106 return;
107 }
108
109 fd = open(argv[0], O_RDONLY);
110 if (fd < 0) {
111 fprintf(stderr, "hpet_info: open of %s failed\n", argv[0]);
112 return;
113 }
114
115 if (ioctl(fd, HPET_INFO, &info) < 0) {
116 fprintf(stderr, "hpet_info: failed to get info\n");
117 goto out;
118 }
119
120 fprintf(stderr, "hpet_info: hi_irqfreq 0x%lx hi_flags 0x%lx ",
121 info.hi_ireqfreq, info.hi_flags);
122 fprintf(stderr, "hi_hpet %d hi_timer %d\n",
123 info.hi_hpet, info.hi_timer);
124
125 out:
126 close(fd);
127 return;
128 }
129
130 void
hpet_poll(int argc,const char ** argv)131 hpet_poll(int argc, const char **argv)
132 {
133 unsigned long freq;
134 int iterations, i, fd;
135 struct pollfd pfd;
136 struct hpet_info info;
137 struct timeval stv, etv;
138 struct timezone tz;
139 long usec;
140
141 if (argc != 3) {
142 fprintf(stderr, "hpet_poll: device-name freq iterations\n");
143 return;
144 }
145
146 freq = atoi(argv[1]);
147 iterations = atoi(argv[2]);
148
149 fd = open(argv[0], O_RDONLY);
150
151 if (fd < 0) {
152 fprintf(stderr, "hpet_poll: open of %s failed\n", argv[0]);
153 return;
154 }
155
156 if (ioctl(fd, HPET_IRQFREQ, freq) < 0) {
157 fprintf(stderr, "hpet_poll: HPET_IRQFREQ failed\n");
158 goto out;
159 }
160
161 if (ioctl(fd, HPET_INFO, &info) < 0) {
162 fprintf(stderr, "hpet_poll: failed to get info\n");
163 goto out;
164 }
165
166 fprintf(stderr, "hpet_poll: info.hi_flags 0x%lx\n", info.hi_flags);
167
168 if (info.hi_flags && (ioctl(fd, HPET_EPI, 0) < 0)) {
169 fprintf(stderr, "hpet_poll: HPET_EPI failed\n");
170 goto out;
171 }
172
173 if (ioctl(fd, HPET_IE_ON, 0) < 0) {
174 fprintf(stderr, "hpet_poll, HPET_IE_ON failed\n");
175 goto out;
176 }
177
178 pfd.fd = fd;
179 pfd.events = POLLIN;
180
181 for (i = 0; i < iterations; i++) {
182 pfd.revents = 0;
183 gettimeofday(&stv, &tz);
184 if (poll(&pfd, 1, -1) < 0)
185 fprintf(stderr, "hpet_poll: poll failed\n");
186 else {
187 long data;
188
189 gettimeofday(&etv, &tz);
190 usec = stv.tv_sec * 1000000 + stv.tv_usec;
191 usec = (etv.tv_sec * 1000000 + etv.tv_usec) - usec;
192
193 fprintf(stderr,
194 "hpet_poll: expired time = 0x%lx\n", usec);
195
196 fprintf(stderr, "hpet_poll: revents = 0x%x\n",
197 pfd.revents);
198
199 if (read(fd, &data, sizeof(data)) != sizeof(data)) {
200 fprintf(stderr, "hpet_poll: read failed\n");
201 }
202 else
203 fprintf(stderr, "hpet_poll: data 0x%lx\n",
204 data);
205 }
206 }
207
208 out:
209 close(fd);
210 return;
211 }
212
213 static int hpet_sigio_count;
214
215 static void
hpet_sigio(int val)216 hpet_sigio(int val)
217 {
218 fprintf(stderr, "hpet_sigio: called\n");
219 hpet_sigio_count++;
220 }
221
222 void
hpet_fasync(int argc,const char ** argv)223 hpet_fasync(int argc, const char **argv)
224 {
225 unsigned long freq;
226 int iterations, i, fd, value;
227 sig_t oldsig;
228 struct hpet_info info;
229
230 hpet_sigio_count = 0;
231 fd = -1;
232
233 if ((oldsig = signal(SIGIO, hpet_sigio)) == SIG_ERR) {
234 fprintf(stderr, "hpet_fasync: failed to set signal handler\n");
235 return;
236 }
237
238 if (argc != 3) {
239 fprintf(stderr, "hpet_fasync: device-name freq iterations\n");
240 goto out;
241 }
242
243 fd = open(argv[0], O_RDONLY);
244
245 if (fd < 0) {
246 fprintf(stderr, "hpet_fasync: failed to open %s\n", argv[0]);
247 return;
248 }
249
250
251 if ((fcntl(fd, F_SETOWN, getpid()) == 1) ||
252 ((value = fcntl(fd, F_GETFL)) == 1) ||
253 (fcntl(fd, F_SETFL, value | O_ASYNC) == 1)) {
254 fprintf(stderr, "hpet_fasync: fcntl failed\n");
255 goto out;
256 }
257
258 freq = atoi(argv[1]);
259 iterations = atoi(argv[2]);
260
261 if (ioctl(fd, HPET_IRQFREQ, freq) < 0) {
262 fprintf(stderr, "hpet_fasync: HPET_IRQFREQ failed\n");
263 goto out;
264 }
265
266 if (ioctl(fd, HPET_INFO, &info) < 0) {
267 fprintf(stderr, "hpet_fasync: failed to get info\n");
268 goto out;
269 }
270
271 fprintf(stderr, "hpet_fasync: info.hi_flags 0x%lx\n", info.hi_flags);
272
273 if (info.hi_flags && (ioctl(fd, HPET_EPI, 0) < 0)) {
274 fprintf(stderr, "hpet_fasync: HPET_EPI failed\n");
275 goto out;
276 }
277
278 if (ioctl(fd, HPET_IE_ON, 0) < 0) {
279 fprintf(stderr, "hpet_fasync, HPET_IE_ON failed\n");
280 goto out;
281 }
282
283 for (i = 0; i < iterations; i++) {
284 (void) pause();
285 fprintf(stderr, "hpet_fasync: count = %d\n", hpet_sigio_count);
286 }
287
288 out:
289 signal(SIGIO, oldsig);
290
291 if (fd >= 0)
292 close(fd);
293
294 return;
295 }
296