Merge pull request #2 from Kimplul/memory

Memory

1 files changed, 95 insertions, 0 deletions

diff --git a/usbhid.h b/usbhid.h
new file mode 100644
index 0000000..8ab2917
--- /dev/null
+++ b/usbhid.h
@@ -0,0 +1,95 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef __USBHID_H
+#define __USBHID_H
+
+/*
+ *  Copyright (c) 1999 Andreas Gal
+ *  Copyright (c) 2000-2001 Vojtech Pavlik
+ *  Copyright (c) 2006 Jiri Kosina
+ */
+
+/*
+ */
+
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/timer.h>
+#include <linux/wait.h>
+#include <linux/workqueue.h>
+#include <linux/input.h>
+
+/*  API provided by hid-core.c for USB HID drivers */
+void usbhid_init_reports(struct hid_device *hid);
+struct usb_interface *usbhid_find_interface(int minor);
+
+/* iofl flags */
+#define HID_CTRL_RUNNING	1
+#define HID_OUT_RUNNING		2
+#define HID_IN_RUNNING		3
+#define HID_RESET_PENDING	4
+#define HID_SUSPENDED		5
+#define HID_CLEAR_HALT		6
+#define HID_DISCONNECTED	7
+#define HID_STARTED		8
+#define HID_KEYS_PRESSED	10
+#define HID_NO_BANDWIDTH	11
+#define HID_RESUME_RUNNING	12
+/*
+ * The device is opened, meaning there is a client that is interested
+ * in data coming from the device.
+ */
+#define HID_OPENED		13
+/*
+ * We are polling input endpoint by [re]submitting IN URB, because
+ * either HID device is opened or ALWAYS POLL quirk is set for the
+ * device.
+ */
+#define HID_IN_POLLING		14
+
+/*
+ * USB-specific HID struct, to be pointed to
+ * from struct hid_device->driver_data
+ */
+
+struct usbhid_device {
+	struct hid_device *hid;						/* pointer to corresponding HID dev */
+
+	struct usb_interface *intf;                                     /* USB interface */
+	int ifnum;                                                      /* USB interface number */
+
+	unsigned int bufsize;                                           /* URB buffer size */
+
+	struct urb *urbin;                                              /* Input URB */
+	char *inbuf;                                                    /* Input buffer */
+	dma_addr_t inbuf_dma;                                           /* Input buffer dma */
+
+	struct urb *urbctrl;                                            /* Control URB */
+	struct usb_ctrlrequest *cr;                                     /* Control request struct */
+	struct hid_control_fifo ctrl[HID_CONTROL_FIFO_SIZE];  		/* Control fifo */
+	unsigned char ctrlhead, ctrltail;                               /* Control fifo head & tail */
+	char *ctrlbuf;                                                  /* Control buffer */
+	dma_addr_t ctrlbuf_dma;                                         /* Control buffer dma */
+	unsigned long last_ctrl;						/* record of last output for timeouts */
+
+	struct urb *urbout;                                             /* Output URB */
+	struct hid_output_fifo out[HID_CONTROL_FIFO_SIZE];              /* Output pipe fifo */
+	unsigned char outhead, outtail;                                 /* Output pipe fifo head & tail */
+	char *outbuf;                                                   /* Output buffer */
+	dma_addr_t outbuf_dma;                                          /* Output buffer dma */
+	unsigned long last_out;							/* record of last output for timeouts */
+
+	spinlock_t lock;						/* fifo spinlock */
+	unsigned long iofl;                                             /* I/O flags (CTRL_RUNNING, OUT_RUNNING) */
+	struct timer_list io_retry;                                     /* Retry timer */
+	unsigned long stop_retry;                                       /* Time to give up, in jiffies */
+	unsigned int retry_delay;                                       /* Delay length in ms */
+	struct work_struct reset_work;                                  /* Task context for resets */
+	wait_queue_head_t wait;						/* For sleeping */
+};
+
+#define	hid_to_usb_dev(hid_dev) \
+	to_usb_device(hid_dev->dev.parent->parent)
+
+#endif