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-rw-r--r--samples/Kconfig8
-rw-r--r--samples/Makefile2
-rw-r--r--samples/hidraw/Makefile10
-rw-r--r--samples/hidraw/hid-example.c178
-rw-r--r--samples/hw_breakpoint/data_breakpoint.c2
5 files changed, 197 insertions, 3 deletions
diff --git a/samples/Kconfig b/samples/Kconfig
index e03cf0e374d7..96a7572853f7 100644
--- a/samples/Kconfig
+++ b/samples/Kconfig
@@ -55,10 +55,16 @@ config SAMPLE_KFIFO
55 If in doubt, say "N" here. 55 If in doubt, say "N" here.
56 56
57config SAMPLE_KDB 57config SAMPLE_KDB
58 tristate "Build kdb command exmaple -- loadable modules only" 58 tristate "Build kdb command example -- loadable modules only"
59 depends on KGDB_KDB && m 59 depends on KGDB_KDB && m
60 help 60 help
61 Build an example of how to dynamically add the hello 61 Build an example of how to dynamically add the hello
62 command to the kdb shell. 62 command to the kdb shell.
63 63
64config SAMPLE_HIDRAW
65 bool "Build simple hidraw example"
66 depends on HIDRAW && HEADERS_CHECK
67 help
68 Build an example of how to use hidraw from userspace.
69
64endif # SAMPLES 70endif # SAMPLES
diff --git a/samples/Makefile b/samples/Makefile
index f26c0959fd86..6280817c2b7e 100644
--- a/samples/Makefile
+++ b/samples/Makefile
@@ -1,4 +1,4 @@
1# Makefile for Linux samples code 1# Makefile for Linux samples code
2 2
3obj-$(CONFIG_SAMPLES) += kobject/ kprobes/ tracepoints/ trace_events/ \ 3obj-$(CONFIG_SAMPLES) += kobject/ kprobes/ tracepoints/ trace_events/ \
4 hw_breakpoint/ kfifo/ kdb/ 4 hw_breakpoint/ kfifo/ kdb/ hidraw/
diff --git a/samples/hidraw/Makefile b/samples/hidraw/Makefile
new file mode 100644
index 000000000000..382eeae77bd6
--- /dev/null
+++ b/samples/hidraw/Makefile
@@ -0,0 +1,10 @@
1# kbuild trick to avoid linker error. Can be omitted if a module is built.
2obj- := dummy.o
3
4# List of programs to build
5hostprogs-y := hid-example
6
7# Tell kbuild to always build the programs
8always := $(hostprogs-y)
9
10HOSTCFLAGS_hid-example.o += -I$(objtree)/usr/include
diff --git a/samples/hidraw/hid-example.c b/samples/hidraw/hid-example.c
new file mode 100644
index 000000000000..816e2dcda7ca
--- /dev/null
+++ b/samples/hidraw/hid-example.c
@@ -0,0 +1,178 @@
1/*
2 * Hidraw Userspace Example
3 *
4 * Copyright (c) 2010 Alan Ott <alan@signal11.us>
5 * Copyright (c) 2010 Signal 11 Software
6 *
7 * The code may be used by anyone for any purpose,
8 * and can serve as a starting point for developing
9 * applications using hidraw.
10 */
11
12/* Linux */
13#include <linux/types.h>
14#include <linux/input.h>
15#include <linux/hidraw.h>
16
17/*
18 * Ugly hack to work around failing compilation on systems that don't
19 * yet populate new version of hidraw.h to userspace.
20 *
21 * If you need this, please have your distro update the kernel headers.
22 */
23#ifndef HIDIOCSFEATURE
24#define HIDIOCSFEATURE(len) _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x06, len)
25#define HIDIOCGFEATURE(len) _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x07, len)
26#endif
27
28/* Unix */
29#include <sys/ioctl.h>
30#include <sys/types.h>
31#include <sys/stat.h>
32#include <fcntl.h>
33#include <unistd.h>
34
35/* C */
36#include <stdio.h>
37#include <string.h>
38#include <stdlib.h>
39#include <errno.h>
40
41const char *bus_str(int bus);
42
43int main(int argc, char **argv)
44{
45 int fd;
46 int i, res, desc_size = 0;
47 char buf[256];
48 struct hidraw_report_descriptor rpt_desc;
49 struct hidraw_devinfo info;
50
51 /* Open the Device with non-blocking reads. In real life,
52 don't use a hard coded path; use libudev instead. */
53 fd = open("/dev/hidraw0", O_RDWR|O_NONBLOCK);
54
55 if (fd < 0) {
56 perror("Unable to open device");
57 return 1;
58 }
59
60 memset(&rpt_desc, 0x0, sizeof(rpt_desc));
61 memset(&info, 0x0, sizeof(info));
62 memset(buf, 0x0, sizeof(buf));
63
64 /* Get Report Descriptor Size */
65 res = ioctl(fd, HIDIOCGRDESCSIZE, &desc_size);
66 if (res < 0)
67 perror("HIDIOCGRDESCSIZE");
68 else
69 printf("Report Descriptor Size: %d\n", desc_size);
70
71 /* Get Report Descriptor */
72 rpt_desc.size = desc_size;
73 res = ioctl(fd, HIDIOCGRDESC, &rpt_desc);
74 if (res < 0) {
75 perror("HIDIOCGRDESC");
76 } else {
77 printf("Report Descriptor:\n");
78 for (i = 0; i < rpt_desc.size; i++)
79 printf("%hhx ", rpt_desc.value[i]);
80 puts("\n");
81 }
82
83 /* Get Raw Name */
84 res = ioctl(fd, HIDIOCGRAWNAME(256), buf);
85 if (res < 0)
86 perror("HIDIOCGRAWNAME");
87 else
88 printf("Raw Name: %s\n", buf);
89
90 /* Get Physical Location */
91 res = ioctl(fd, HIDIOCGRAWPHYS(256), buf);
92 if (res < 0)
93 perror("HIDIOCGRAWPHYS");
94 else
95 printf("Raw Phys: %s\n", buf);
96
97 /* Get Raw Info */
98 res = ioctl(fd, HIDIOCGRAWINFO, &info);
99 if (res < 0) {
100 perror("HIDIOCGRAWINFO");
101 } else {
102 printf("Raw Info:\n");
103 printf("\tbustype: %d (%s)\n",
104 info.bustype, bus_str(info.bustype));
105 printf("\tvendor: 0x%04hx\n", info.vendor);
106 printf("\tproduct: 0x%04hx\n", info.product);
107 }
108
109 /* Set Feature */
110 buf[0] = 0x9; /* Report Number */
111 buf[1] = 0xff;
112 buf[2] = 0xff;
113 buf[3] = 0xff;
114 res = ioctl(fd, HIDIOCSFEATURE(4), buf);
115 if (res < 0)
116 perror("HIDIOCSFEATURE");
117 else
118 printf("ioctl HIDIOCGFEATURE returned: %d\n", res);
119
120 /* Get Feature */
121 buf[0] = 0x9; /* Report Number */
122 res = ioctl(fd, HIDIOCGFEATURE(256), buf);
123 if (res < 0) {
124 perror("HIDIOCGFEATURE");
125 } else {
126 printf("ioctl HIDIOCGFEATURE returned: %d\n", res);
127 printf("Report data (not containing the report number):\n\t");
128 for (i = 0; i < res; i++)
129 printf("%hhx ", buf[i]);
130 puts("\n");
131 }
132
133 /* Send a Report to the Device */
134 buf[0] = 0x1; /* Report Number */
135 buf[1] = 0x77;
136 res = write(fd, buf, 2);
137 if (res < 0) {
138 printf("Error: %d\n", errno);
139 perror("write");
140 } else {
141 printf("write() wrote %d bytes\n", res);
142 }
143
144 /* Get a report from the device */
145 res = read(fd, buf, 16);
146 if (res < 0) {
147 perror("read");
148 } else {
149 printf("read() read %d bytes:\n\t", res);
150 for (i = 0; i < res; i++)
151 printf("%hhx ", buf[i]);
152 puts("\n");
153 }
154 close(fd);
155 return 0;
156}
157
158const char *
159bus_str(int bus)
160{
161 switch (bus) {
162 case BUS_USB:
163 return "USB";
164 break;
165 case BUS_HIL:
166 return "HIL";
167 break;
168 case BUS_BLUETOOTH:
169 return "Bluetooth";
170 break;
171 case BUS_VIRTUAL:
172 return "Virtual";
173 break;
174 default:
175 return "Other";
176 break;
177 }
178}
diff --git a/samples/hw_breakpoint/data_breakpoint.c b/samples/hw_breakpoint/data_breakpoint.c
index bd0f337afcab..063653955f9f 100644
--- a/samples/hw_breakpoint/data_breakpoint.c
+++ b/samples/hw_breakpoint/data_breakpoint.c
@@ -19,7 +19,7 @@
19 * 19 *
20 * This file is a kernel module that places a breakpoint over ksym_name kernel 20 * This file is a kernel module that places a breakpoint over ksym_name kernel
21 * variable using Hardware Breakpoint register. The corresponding handler which 21 * variable using Hardware Breakpoint register. The corresponding handler which
22 * prints a backtrace is invoked everytime a write operation is performed on 22 * prints a backtrace is invoked every time a write operation is performed on
23 * that variable. 23 * that variable.
24 * 24 *
25 * Copyright (C) IBM Corporation, 2009 25 * Copyright (C) IBM Corporation, 2009