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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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0361a28d3f
This uses the USB busy mechanism for aggessive autosuspend of USB HID devices. It autosuspends all opened devices supporting remote wakeup after a timeout unless - output is being done to the device - a key is being held down (remote wakeup isn't triggered upon key release) - LED(s) are lit - hiddev is opened As in the current driver closed devices will be autosuspended even if they don't support remote wakeup. The patch is quite large because output to devices is done in hard interrupt context meaning a lot a queuing and locking had to be touched. The LED stuff has been solved by means of a simple counter. Additions to the generic HID code could be avoided. In addition it now covers hidraw. It contains an embryonic version of an API to let the generic HID code tell the lower levels which capabilities with respect to power management are needed. Signed-off-by: Oliver Neukum <oneukum@suse.de> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
106 lines
4.3 KiB
C
106 lines
4.3 KiB
C
#ifndef __USBHID_H
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#define __USBHID_H
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/*
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* Copyright (c) 1999 Andreas Gal
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* Copyright (c) 2000-2001 Vojtech Pavlik
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* Copyright (c) 2006 Jiri Kosina
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/timer.h>
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#include <linux/wait.h>
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#include <linux/workqueue.h>
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#include <linux/input.h>
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/* API provided by hid-core.c for USB HID drivers */
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int usbhid_wait_io(struct hid_device* hid);
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void usbhid_close(struct hid_device *hid);
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int usbhid_open(struct hid_device *hid);
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void usbhid_init_reports(struct hid_device *hid);
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void usbhid_submit_report
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(struct hid_device *hid, struct hid_report *report, unsigned char dir);
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int usbhid_get_power(struct hid_device *hid);
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void usbhid_put_power(struct hid_device *hid);
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/* iofl flags */
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#define HID_CTRL_RUNNING 1
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#define HID_OUT_RUNNING 2
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#define HID_IN_RUNNING 3
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#define HID_RESET_PENDING 4
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#define HID_SUSPENDED 5
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#define HID_CLEAR_HALT 6
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#define HID_DISCONNECTED 7
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#define HID_STARTED 8
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#define HID_REPORTED_IDLE 9
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#define HID_KEYS_PRESSED 10
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#define HID_LED_ON 11
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/*
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* USB-specific HID struct, to be pointed to
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* from struct hid_device->driver_data
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*/
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struct usbhid_device {
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struct hid_device *hid; /* pointer to corresponding HID dev */
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struct usb_interface *intf; /* USB interface */
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int ifnum; /* USB interface number */
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unsigned int bufsize; /* URB buffer size */
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struct urb *urbin; /* Input URB */
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char *inbuf; /* Input buffer */
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dma_addr_t inbuf_dma; /* Input buffer dma */
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struct urb *urbctrl; /* Control URB */
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struct usb_ctrlrequest *cr; /* Control request struct */
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dma_addr_t cr_dma; /* Control request struct dma */
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struct hid_control_fifo ctrl[HID_CONTROL_FIFO_SIZE]; /* Control fifo */
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unsigned char ctrlhead, ctrltail; /* Control fifo head & tail */
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char *ctrlbuf; /* Control buffer */
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dma_addr_t ctrlbuf_dma; /* Control buffer dma */
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struct urb *urbout; /* Output URB */
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struct hid_output_fifo out[HID_CONTROL_FIFO_SIZE]; /* Output pipe fifo */
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unsigned char outhead, outtail; /* Output pipe fifo head & tail */
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char *outbuf; /* Output buffer */
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dma_addr_t outbuf_dma; /* Output buffer dma */
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spinlock_t lock; /* fifo spinlock */
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unsigned long iofl; /* I/O flags (CTRL_RUNNING, OUT_RUNNING) */
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struct timer_list io_retry; /* Retry timer */
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unsigned long stop_retry; /* Time to give up, in jiffies */
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unsigned int retry_delay; /* Delay length in ms */
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struct work_struct reset_work; /* Task context for resets */
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struct work_struct restart_work; /* waking up for output to be done in a task */
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wait_queue_head_t wait; /* For sleeping */
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int ledcount; /* counting the number of active leds */
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};
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#define hid_to_usb_dev(hid_dev) \
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container_of(hid_dev->dev.parent->parent, struct usb_device, dev)
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#endif
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