98 lines · c
1/* SPDX-License-Identifier: GPL-2.0-or-later */2#ifndef __USBHID_H3#define __USBHID_H4 5/*6 * Copyright (c) 1999 Andreas Gal7 * Copyright (c) 2000-2001 Vojtech Pavlik8 * Copyright (c) 2006 Jiri Kosina9 */10 11/*12 */13 14#include <linux/types.h>15#include <linux/slab.h>16#include <linux/list.h>17#include <linux/mutex.h>18#include <linux/timer.h>19#include <linux/wait.h>20#include <linux/workqueue.h>21#include <linux/input.h>22 23/* API provided by hid-core.c for USB HID drivers */24void usbhid_init_reports(struct hid_device *hid);25struct usb_interface *usbhid_find_interface(int minor);26 27/* iofl flags */28#define HID_CTRL_RUNNING 129#define HID_OUT_RUNNING 230#define HID_IN_RUNNING 331#define HID_RESET_PENDING 432#define HID_SUSPENDED 533#define HID_CLEAR_HALT 634#define HID_DISCONNECTED 735#define HID_STARTED 836#define HID_KEYS_PRESSED 1037#define HID_NO_BANDWIDTH 1138#define HID_RESUME_RUNNING 1239/*40 * The device is opened, meaning there is a client that is interested41 * in data coming from the device.42 */43#define HID_OPENED 1344/*45 * We are polling input endpoint by [re]submitting IN URB, because46 * either HID device is opened or ALWAYS POLL quirk is set for the47 * device.48 */49#define HID_IN_POLLING 1450 51/*52 * USB-specific HID struct, to be pointed to53 * from struct hid_device->driver_data54 */55 56struct usbhid_device {57 struct hid_device *hid; /* pointer to corresponding HID dev */58 59 struct usb_interface *intf; /* USB interface */60 int ifnum; /* USB interface number */61 62 unsigned int bufsize; /* URB buffer size */63 64 struct urb *urbin; /* Input URB */65 char *inbuf; /* Input buffer */66 dma_addr_t inbuf_dma; /* Input buffer dma */67 68 struct urb *urbctrl; /* Control URB */69 struct usb_ctrlrequest *cr; /* Control request struct */70 struct hid_control_fifo ctrl[HID_CONTROL_FIFO_SIZE]; /* Control fifo */71 unsigned char ctrlhead, ctrltail; /* Control fifo head & tail */72 char *ctrlbuf; /* Control buffer */73 dma_addr_t ctrlbuf_dma; /* Control buffer dma */74 unsigned long last_ctrl; /* record of last output for timeouts */75 76 struct urb *urbout; /* Output URB */77 struct hid_output_fifo out[HID_CONTROL_FIFO_SIZE]; /* Output pipe fifo */78 unsigned char outhead, outtail; /* Output pipe fifo head & tail */79 char *outbuf; /* Output buffer */80 dma_addr_t outbuf_dma; /* Output buffer dma */81 unsigned long last_out; /* record of last output for timeouts */82 83 struct mutex mutex; /* start/stop/open/close */84 spinlock_t lock; /* fifo spinlock */85 unsigned long iofl; /* I/O flags (CTRL_RUNNING, OUT_RUNNING) */86 struct timer_list io_retry; /* Retry timer */87 unsigned long stop_retry; /* Time to give up, in jiffies */88 unsigned int retry_delay; /* Delay length in ms */89 struct work_struct reset_work; /* Task context for resets */90 wait_queue_head_t wait; /* For sleeping */91};92 93#define hid_to_usb_dev(hid_dev) \94 to_usb_device(hid_dev->dev.parent->parent)95 96#endif97 98