~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/samples/hidraw/hid-example.c

Version: ~ [ linux-5.12 ] ~ [ linux-5.11.16 ] ~ [ linux-5.10.32 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.114 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.188 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.231 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.267 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.267 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 #ifndef HIDIOCSFEATURE
 22 #warning Please have your distro update the userspace kernel headers
 23 #define HIDIOCSFEATURE(len)    _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x06, len)
 24 #define HIDIOCGFEATURE(len)    _IOC(_IOC_WRITE|_IOC_READ, 'H', 0x07, len)
 25 #endif
 26 
 27 /* Unix */
 28 #include <sys/ioctl.h>
 29 #include <sys/types.h>
 30 #include <sys/stat.h>
 31 #include <fcntl.h>
 32 #include <unistd.h>
 33 
 34 /* C */
 35 #include <stdio.h>
 36 #include <string.h>
 37 #include <stdlib.h>
 38 #include <errno.h>
 39 
 40 const char *bus_str(int bus);
 41 
 42 int main(int argc, char **argv)
 43 {
 44         int fd;
 45         int i, res, desc_size = 0;
 46         char buf[256];
 47         struct hidraw_report_descriptor rpt_desc;
 48         struct hidraw_devinfo info;
 49 
 50         /* Open the Device with non-blocking reads. In real life,
 51            don't use a hard coded path; use libudev instead. */
 52         fd = open("/dev/hidraw0", O_RDWR|O_NONBLOCK);
 53 
 54         if (fd < 0) {
 55                 perror("Unable to open device");
 56                 return 1;
 57         }
 58 
 59         memset(&rpt_desc, 0x0, sizeof(rpt_desc));
 60         memset(&info, 0x0, sizeof(info));
 61         memset(buf, 0x0, sizeof(buf));
 62 
 63         /* Get Report Descriptor Size */
 64         res = ioctl(fd, HIDIOCGRDESCSIZE, &desc_size);
 65         if (res < 0)
 66                 perror("HIDIOCGRDESCSIZE");
 67         else
 68                 printf("Report Descriptor Size: %d\n", desc_size);
 69 
 70         /* Get Report Descriptor */
 71         rpt_desc.size = desc_size;
 72         res = ioctl(fd, HIDIOCGRDESC, &rpt_desc);
 73         if (res < 0) {
 74                 perror("HIDIOCGRDESC");
 75         } else {
 76                 printf("Report Descriptor:\n");
 77                 for (i = 0; i < rpt_desc.size; i++)
 78                         printf("%hhx ", rpt_desc.value[i]);
 79                 puts("\n");
 80         }
 81 
 82         /* Get Raw Name */
 83         res = ioctl(fd, HIDIOCGRAWNAME(256), buf);
 84         if (res < 0)
 85                 perror("HIDIOCGRAWNAME");
 86         else
 87                 printf("Raw Name: %s\n", buf);
 88 
 89         /* Get Physical Location */
 90         res = ioctl(fd, HIDIOCGRAWPHYS(256), buf);
 91         if (res < 0)
 92                 perror("HIDIOCGRAWPHYS");
 93         else
 94                 printf("Raw Phys: %s\n", buf);
 95 
 96         /* Get Raw Info */
 97         res = ioctl(fd, HIDIOCGRAWINFO, &info);
 98         if (res < 0) {
 99                 perror("HIDIOCGRAWINFO");
100         } else {
101                 printf("Raw Info:\n");
102                 printf("\tbustype: %d (%s)\n",
103                         info.bustype, bus_str(info.bustype));
104                 printf("\tvendor: 0x%04hx\n", info.vendor);
105                 printf("\tproduct: 0x%04hx\n", info.product);
106         }
107 
108         /* Set Feature */
109         buf[0] = 0x9; /* Report Number */
110         buf[1] = 0xff;
111         buf[2] = 0xff;
112         buf[3] = 0xff;
113         res = ioctl(fd, HIDIOCSFEATURE(4), buf);
114         if (res < 0)
115                 perror("HIDIOCSFEATURE");
116         else
117                 printf("ioctl HIDIOCGFEATURE returned: %d\n", res);
118 
119         /* Get Feature */
120         buf[0] = 0x9; /* Report Number */
121         res = ioctl(fd, HIDIOCGFEATURE(256), buf);
122         if (res < 0) {
123                 perror("HIDIOCGFEATURE");
124         } else {
125                 printf("ioctl HIDIOCGFEATURE returned: %d\n", res);
126                 printf("Report data (not containing the report number):\n\t");
127                 for (i = 0; i < res; i++)
128                         printf("%hhx ", buf[i]);
129                 puts("\n");
130         }
131 
132         /* Send a Report to the Device */
133         buf[0] = 0x1; /* Report Number */
134         buf[1] = 0x77;
135         res = write(fd, buf, 2);
136         if (res < 0) {
137                 printf("Error: %d\n", errno);
138                 perror("write");
139         } else {
140                 printf("write() wrote %d bytes\n", res);
141         }
142 
143         /* Get a report from the device */
144         res = read(fd, buf, 16);
145         if (res < 0) {
146                 perror("read");
147         } else {
148                 printf("read() read %d bytes:\n\t", res);
149                 for (i = 0; i < res; i++)
150                         printf("%hhx ", buf[i]);
151                 puts("\n");
152         }
153         close(fd);
154         return 0;
155 }
156 
157 const char *
158 bus_str(int bus)
159 {
160         switch (bus) {
161         case BUS_USB:
162                 return "USB";
163                 break;
164         case BUS_HIL:
165                 return "HIL";
166                 break;
167         case BUS_BLUETOOTH:
168                 return "Bluetooth";
169                 break;
170         case BUS_VIRTUAL:
171                 return "Virtual";
172                 break;
173         default:
174                 return "Other";
175                 break;
176         }
177 }
178 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp