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authorShuah Khan <shuahkh@osg.samsung.com>2016-09-16 19:20:42 -0400
committerShuah Khan <shuahkh@osg.samsung.com>2016-09-23 13:51:58 -0400
commit155fe001c6cd840c1cef3a8c42a8f14296a47c57 (patch)
tree14d1f3f9ded611d9eca37894cc4879b90b30c9e4 /Documentation
parent986b891ad121c61200d3dffcc8ed128a1397682e (diff)
samples: move timers example code from Documentation
Move timers examples to samples and remove it from Documentation Makefile. Create a new Makefile to build timers. It can be built from top level directory or from timers directory: Run make -C samples/timers or cd samples/timers; make Acked-by: Jonathan Corbet <corbet@lwn.net> Acked-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/Makefile2
-rw-r--r--Documentation/timers/.gitignore1
-rw-r--r--Documentation/timers/Makefile5
-rw-r--r--Documentation/timers/hpet.txt2
-rw-r--r--Documentation/timers/hpet_example.c294
5 files changed, 2 insertions, 302 deletions
diff --git a/Documentation/Makefile b/Documentation/Makefile
index 3c2a207a7c40..fc386b7a01b2 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -1,2 +1,2 @@
1subdir-y := accounting auxdisplay blackfin \ 1subdir-y := accounting auxdisplay blackfin \
2 laptops pcmcia timers watchdog 2 laptops pcmcia watchdog
diff --git a/Documentation/timers/.gitignore b/Documentation/timers/.gitignore
deleted file mode 100644
index c5c45d7ec0df..000000000000
--- a/Documentation/timers/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
1hpet_example
diff --git a/Documentation/timers/Makefile b/Documentation/timers/Makefile
deleted file mode 100644
index 6c09ee6ca721..000000000000
--- a/Documentation/timers/Makefile
+++ /dev/null
@@ -1,5 +0,0 @@
1# List of programs to build
2hostprogs-$(CONFIG_X86) := hpet_example
3
4# Tell kbuild to always build the programs
5always := $(hostprogs-y)
diff --git a/Documentation/timers/hpet.txt b/Documentation/timers/hpet.txt
index a484d2c109d7..895345ec513b 100644
--- a/Documentation/timers/hpet.txt
+++ b/Documentation/timers/hpet.txt
@@ -25,4 +25,4 @@ arch/x86/kernel/hpet.c.
25 25
26The driver provides a userspace API which resembles the API found in the 26The driver provides a userspace API which resembles the API found in the
27RTC driver framework. An example user space program is provided in 27RTC driver framework. An example user space program is provided in
28file:Documentation/timers/hpet_example.c 28file:samples/timers/hpet_example.c
diff --git a/Documentation/timers/hpet_example.c b/Documentation/timers/hpet_example.c
deleted file mode 100644
index 3ab4993d85e0..000000000000
--- a/Documentation/timers/hpet_example.c
+++ /dev/null
@@ -1,294 +0,0 @@
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 <errno.h>
14#include <sys/time.h>
15#include <linux/hpet.h>
16
17
18extern void hpet_open_close(int, const char **);
19extern void hpet_info(int, const char **);
20extern void hpet_poll(int, const char **);
21extern void hpet_fasync(int, const char **);
22extern void hpet_read(int, const char **);
23
24#include <sys/poll.h>
25#include <sys/ioctl.h>
26
27struct hpet_command {
28 char *command;
29 void (*func)(int argc, const char ** argv);
30} hpet_command[] = {
31 {
32 "open-close",
33 hpet_open_close
34 },
35 {
36 "info",
37 hpet_info
38 },
39 {
40 "poll",
41 hpet_poll
42 },
43 {
44 "fasync",
45 hpet_fasync
46 },
47};
48
49int
50main(int argc, const char ** argv)
51{
52 unsigned int i;
53
54 argc--;
55 argv++;
56
57 if (!argc) {
58 fprintf(stderr, "-hpet: requires command\n");
59 return -1;
60 }
61
62
63 for (i = 0; i < (sizeof (hpet_command) / sizeof (hpet_command[0])); i++)
64 if (!strcmp(argv[0], hpet_command[i].command)) {
65 argc--;
66 argv++;
67 fprintf(stderr, "-hpet: executing %s\n",
68 hpet_command[i].command);
69 hpet_command[i].func(argc, argv);
70 return 0;
71 }
72
73 fprintf(stderr, "do_hpet: command %s not implemented\n", argv[0]);
74
75 return -1;
76}
77
78void
79hpet_open_close(int argc, const char **argv)
80{
81 int fd;
82
83 if (argc != 1) {
84 fprintf(stderr, "hpet_open_close: device-name\n");
85 return;
86 }
87
88 fd = open(argv[0], O_RDONLY);
89 if (fd < 0)
90 fprintf(stderr, "hpet_open_close: open failed\n");
91 else
92 close(fd);
93
94 return;
95}
96
97void
98hpet_info(int argc, const char **argv)
99{
100 struct hpet_info info;
101 int fd;
102
103 if (argc != 1) {
104 fprintf(stderr, "hpet_info: device-name\n");
105 return;
106 }
107
108 fd = open(argv[0], O_RDONLY);
109 if (fd < 0) {
110 fprintf(stderr, "hpet_info: open of %s failed\n", argv[0]);
111 return;
112 }
113
114 if (ioctl(fd, HPET_INFO, &info) < 0) {
115 fprintf(stderr, "hpet_info: failed to get info\n");
116 goto out;
117 }
118
119 fprintf(stderr, "hpet_info: hi_irqfreq 0x%lx hi_flags 0x%lx ",
120 info.hi_ireqfreq, info.hi_flags);
121 fprintf(stderr, "hi_hpet %d hi_timer %d\n",
122 info.hi_hpet, info.hi_timer);
123
124out:
125 close(fd);
126 return;
127}
128
129void
130hpet_poll(int argc, const char **argv)
131{
132 unsigned long freq;
133 int iterations, i, fd;
134 struct pollfd pfd;
135 struct hpet_info info;
136 struct timeval stv, etv;
137 struct timezone tz;
138 long usec;
139
140 if (argc != 3) {
141 fprintf(stderr, "hpet_poll: device-name freq iterations\n");
142 return;
143 }
144
145 freq = atoi(argv[1]);
146 iterations = atoi(argv[2]);
147
148 fd = open(argv[0], O_RDONLY);
149
150 if (fd < 0) {
151 fprintf(stderr, "hpet_poll: open of %s failed\n", argv[0]);
152 return;
153 }
154
155 if (ioctl(fd, HPET_IRQFREQ, freq) < 0) {
156 fprintf(stderr, "hpet_poll: HPET_IRQFREQ failed\n");
157 goto out;
158 }
159
160 if (ioctl(fd, HPET_INFO, &info) < 0) {
161 fprintf(stderr, "hpet_poll: failed to get info\n");
162 goto out;
163 }
164
165 fprintf(stderr, "hpet_poll: info.hi_flags 0x%lx\n", info.hi_flags);
166
167 if (info.hi_flags && (ioctl(fd, HPET_EPI, 0) < 0)) {
168 fprintf(stderr, "hpet_poll: HPET_EPI failed\n");
169 goto out;
170 }
171
172 if (ioctl(fd, HPET_IE_ON, 0) < 0) {
173 fprintf(stderr, "hpet_poll, HPET_IE_ON failed\n");
174 goto out;
175 }
176
177 pfd.fd = fd;
178 pfd.events = POLLIN;
179
180 for (i = 0; i < iterations; i++) {
181 pfd.revents = 0;
182 gettimeofday(&stv, &tz);
183 if (poll(&pfd, 1, -1) < 0)
184 fprintf(stderr, "hpet_poll: poll failed\n");
185 else {
186 long data;
187
188 gettimeofday(&etv, &tz);
189 usec = stv.tv_sec * 1000000 + stv.tv_usec;
190 usec = (etv.tv_sec * 1000000 + etv.tv_usec) - usec;
191
192 fprintf(stderr,
193 "hpet_poll: expired time = 0x%lx\n", usec);
194
195 fprintf(stderr, "hpet_poll: revents = 0x%x\n",
196 pfd.revents);
197
198 if (read(fd, &data, sizeof(data)) != sizeof(data)) {
199 fprintf(stderr, "hpet_poll: read failed\n");
200 }
201 else
202 fprintf(stderr, "hpet_poll: data 0x%lx\n",
203 data);
204 }
205 }
206
207out:
208 close(fd);
209 return;
210}
211
212static int hpet_sigio_count;
213
214static void
215hpet_sigio(int val)
216{
217 fprintf(stderr, "hpet_sigio: called\n");
218 hpet_sigio_count++;
219}
220
221void
222hpet_fasync(int argc, const char **argv)
223{
224 unsigned long freq;
225 int iterations, i, fd, value;
226 sig_t oldsig;
227 struct hpet_info info;
228
229 hpet_sigio_count = 0;
230 fd = -1;
231
232 if ((oldsig = signal(SIGIO, hpet_sigio)) == SIG_ERR) {
233 fprintf(stderr, "hpet_fasync: failed to set signal handler\n");
234 return;
235 }
236
237 if (argc != 3) {
238 fprintf(stderr, "hpet_fasync: device-name freq iterations\n");
239 goto out;
240 }
241
242 fd = open(argv[0], O_RDONLY);
243
244 if (fd < 0) {
245 fprintf(stderr, "hpet_fasync: failed to open %s\n", argv[0]);
246 return;
247 }
248
249
250 if ((fcntl(fd, F_SETOWN, getpid()) == 1) ||
251 ((value = fcntl(fd, F_GETFL)) == 1) ||
252 (fcntl(fd, F_SETFL, value | O_ASYNC) == 1)) {
253 fprintf(stderr, "hpet_fasync: fcntl failed\n");
254 goto out;
255 }
256
257 freq = atoi(argv[1]);
258 iterations = atoi(argv[2]);
259
260 if (ioctl(fd, HPET_IRQFREQ, freq) < 0) {
261 fprintf(stderr, "hpet_fasync: HPET_IRQFREQ failed\n");
262 goto out;
263 }
264
265 if (ioctl(fd, HPET_INFO, &info) < 0) {
266 fprintf(stderr, "hpet_fasync: failed to get info\n");
267 goto out;
268 }
269
270 fprintf(stderr, "hpet_fasync: info.hi_flags 0x%lx\n", info.hi_flags);
271
272 if (info.hi_flags && (ioctl(fd, HPET_EPI, 0) < 0)) {
273 fprintf(stderr, "hpet_fasync: HPET_EPI failed\n");
274 goto out;
275 }
276
277 if (ioctl(fd, HPET_IE_ON, 0) < 0) {
278 fprintf(stderr, "hpet_fasync, HPET_IE_ON failed\n");
279 goto out;
280 }
281
282 for (i = 0; i < iterations; i++) {
283 (void) pause();
284 fprintf(stderr, "hpet_fasync: count = %d\n", hpet_sigio_count);
285 }
286
287out:
288 signal(SIGIO, oldsig);
289
290 if (fd >= 0)
291 close(fd);
292
293 return;
294}
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