HID: uhid: allow feeding input data into uhid devices (5e87a36a) · Commits · 戴 / test

drivers/hid/uhid.c

+14 −0

Original line number	Diff line number	Diff line
		@@ -210,6 +210,17 @@ static int uhid_dev_destroy(struct uhid_device *uhid)
		return 0;
		}

		static int uhid_dev_input(struct uhid_device uhid, struct uhid_event ev)
		{
		if (!uhid->running)
		return -EINVAL;

		hid_input_report(uhid->hid, HID_INPUT_REPORT, ev->u.input.data,
		min_t(size_t, ev->u.input.size, UHID_DATA_MAX), 0);

		return 0;
		}

		static int uhid_char_open(struct inode inode, struct file file)
		{
		struct uhid_device *uhid;
		@@ -321,6 +332,9 @@ static ssize_t uhid_char_write(struct file file, const char __user buffer,
		case UHID_DESTROY:
		ret = uhid_dev_destroy(uhid);
		break;
		case UHID_INPUT:
		ret = uhid_dev_input(uhid, &uhid->input_buf);
		break;
		default:
		ret = -EOPNOTSUPP;
		}

+9 −0

Original line number	Diff line number	Diff line
		@@ -25,6 +25,7 @@
		enum uhid_event_type {
		UHID_CREATE,
		UHID_DESTROY,
		UHID_INPUT,
		};

		struct uhid_create_req {
		@@ -41,11 +42,19 @@ struct uhid_create_req {
		__u32 country;
		} __attribute__((__packed__));

		#define UHID_DATA_MAX 4096

		struct uhid_input_req {
		__u8 data[UHID_DATA_MAX];
		__u16 size;
		} __attribute__((__packed__));

		struct uhid_event {
		__u32 type;

		union {
		struct uhid_create_req create;
		struct uhid_input_req input;
		} u;
		} __attribute__((__packed__));