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Commit 9188e79e authored by Jiri Kosina's avatar Jiri Kosina
Browse files

HID: add phys and name ioctls to hidraw 



The hiddev interface provides ioctl() calls which can be used
to obtain phys and raw name of the underlying device.

Add the corresponding support also into hidraw.

Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 6bbe586f

drivers/hid/hidraw.c

+28 −0
Original line number Diff line number Diff line
@@ -265,6 +265,34 @@ static long hidraw_ioctl(struct file *file, unsigned int cmd, 
				break;

			}

		default:

			{

				struct hid_device *hid = dev->hid;

				if (_IOC_TYPE(cmd) != 'H' || _IOC_DIR(cmd) != _IOC_READ)

					return -EINVAL;



				if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGRAWNAME(0))) {

					int len;

					if (!hid->name)

						return 0;

					len = strlen(hid->name) + 1;

					if (len > _IOC_SIZE(cmd))

						len = _IOC_SIZE(cmd);

					return copy_to_user(user_arg, hid->name, len) ?

						-EFAULT : len;

				}



				if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGRAWPHYS(0))) {

					int len;

					if (!hid->phys)

						return 0;

					len = strlen(hid->phys) + 1;

					if (len > _IOC_SIZE(cmd))

						len = _IOC_SIZE(cmd);

					return copy_to_user(user_arg, hid->phys, len) ?

						-EFAULT : len;

				}

                }



			ret = -ENOTTY;

	}

	unlock_kernel();

include/linux/hidraw.h

+2 −0
Original line number Diff line number Diff line
@@ -33,6 +33,8 @@ struct hidraw_devinfo { 
#define HIDIOCGRDESCSIZE	_IOR('H', 0x01, int)

#define HIDIOCGRDESC		_IOR('H', 0x02, struct hidraw_report_descriptor)

#define HIDIOCGRAWINFO		_IOR('H', 0x03, struct hidraw_devinfo)

#define HIDIOCGRAWNAME(len)     _IOC(_IOC_READ, 'H', 0x04, len)

#define HIDIOCGRAWPHYS(len)     _IOC(_IOC_READ, 'H', 0x05, len)



#define HIDRAW_FIRST_MINOR 0

#define HIDRAW_MAX_DEVICES 64