| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * USB HID support for Linux |
| * |
| * Copyright (c) 1999 Andreas Gal |
| * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> |
| * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc |
| * Copyright (c) 2007-2008 Oliver Neukum |
| * Copyright (c) 2006-2010 Jiri Kosina |
| */ |
| |
| /* |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/list.h> |
| #include <linux/mm.h> |
| #include <linux/mutex.h> |
| #include <linux/spinlock.h> |
| #include <asm/unaligned.h> |
| #include <asm/byteorder.h> |
| #include <linux/input.h> |
| #include <linux/wait.h> |
| #include <linux/workqueue.h> |
| #include <linux/string.h> |
| |
| #include <linux/usb.h> |
| |
| #include <linux/hid.h> |
| #include <linux/hiddev.h> |
| #include <linux/hid-debug.h> |
| #include <linux/hidraw.h> |
| #include "usbhid.h" |
| |
| /* |
| * Version Information |
| */ |
| |
| #define DRIVER_DESC "USB HID core driver" |
| |
| /* |
| * Module parameters. |
| */ |
| |
| static unsigned int hid_mousepoll_interval; |
| module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644); |
| MODULE_PARM_DESC(mousepoll, "Polling interval of mice"); |
| |
| static unsigned int hid_jspoll_interval; |
| module_param_named(jspoll, hid_jspoll_interval, uint, 0644); |
| MODULE_PARM_DESC(jspoll, "Polling interval of joysticks"); |
| |
| static unsigned int hid_kbpoll_interval; |
| module_param_named(kbpoll, hid_kbpoll_interval, uint, 0644); |
| MODULE_PARM_DESC(kbpoll, "Polling interval of keyboards"); |
| |
| static unsigned int ignoreled; |
| module_param_named(ignoreled, ignoreled, uint, 0644); |
| MODULE_PARM_DESC(ignoreled, "Autosuspend with active leds"); |
| |
| /* Quirks specified at module load time */ |
| static char *quirks_param[MAX_USBHID_BOOT_QUIRKS]; |
| module_param_array_named(quirks, quirks_param, charp, NULL, 0444); |
| MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying " |
| " quirks=vendorID:productID:quirks" |
| " where vendorID, productID, and quirks are all in" |
| " 0x-prefixed hex"); |
| /* |
| * Input submission and I/O error handler. |
| */ |
| static void hid_io_error(struct hid_device *hid); |
| static int hid_submit_out(struct hid_device *hid); |
| static int hid_submit_ctrl(struct hid_device *hid); |
| static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid); |
| |
| /* Start up the input URB */ |
| static int hid_start_in(struct hid_device *hid) |
| { |
| unsigned long flags; |
| int rc = 0; |
| struct usbhid_device *usbhid = hid->driver_data; |
| |
| spin_lock_irqsave(&usbhid->lock, flags); |
| if (test_bit(HID_IN_POLLING, &usbhid->iofl) && |
| !test_bit(HID_DISCONNECTED, &usbhid->iofl) && |
| !test_bit(HID_SUSPENDED, &usbhid->iofl) && |
| !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) { |
| rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC); |
| if (rc != 0) { |
| clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
| if (rc == -ENOSPC) |
| set_bit(HID_NO_BANDWIDTH, &usbhid->iofl); |
| } else { |
| clear_bit(HID_NO_BANDWIDTH, &usbhid->iofl); |
| } |
| } |
| spin_unlock_irqrestore(&usbhid->lock, flags); |
| return rc; |
| } |
| |
| /* I/O retry timer routine */ |
| static void hid_retry_timeout(struct timer_list *t) |
| { |
| struct usbhid_device *usbhid = from_timer(usbhid, t, io_retry); |
| struct hid_device *hid = usbhid->hid; |
| |
| dev_dbg(&usbhid->intf->dev, "retrying intr urb\n"); |
| if (hid_start_in(hid)) |
| hid_io_error(hid); |
| } |
| |
| /* Workqueue routine to reset the device or clear a halt */ |
| static void hid_reset(struct work_struct *work) |
| { |
| struct usbhid_device *usbhid = |
| container_of(work, struct usbhid_device, reset_work); |
| struct hid_device *hid = usbhid->hid; |
| int rc; |
| |
| if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) { |
| dev_dbg(&usbhid->intf->dev, "clear halt\n"); |
| rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe); |
| clear_bit(HID_CLEAR_HALT, &usbhid->iofl); |
| if (rc == 0) { |
| hid_start_in(hid); |
| } else { |
| dev_dbg(&usbhid->intf->dev, |
| "clear-halt failed: %d\n", rc); |
| set_bit(HID_RESET_PENDING, &usbhid->iofl); |
| } |
| } |
| |
| if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) { |
| dev_dbg(&usbhid->intf->dev, "resetting device\n"); |
| usb_queue_reset_device(usbhid->intf); |
| } |
| } |
| |
| /* Main I/O error handler */ |
| static void hid_io_error(struct hid_device *hid) |
| { |
| unsigned long flags; |
| struct usbhid_device *usbhid = hid->driver_data; |
| |
| spin_lock_irqsave(&usbhid->lock, flags); |
| |
| /* Stop when disconnected */ |
| if (test_bit(HID_DISCONNECTED, &usbhid->iofl)) |
| goto done; |
| |
| /* If it has been a while since the last error, we'll assume |
| * this a brand new error and reset the retry timeout. */ |
| if (time_after(jiffies, usbhid->stop_retry + HZ/2)) |
| usbhid->retry_delay = 0; |
| |
| /* When an error occurs, retry at increasing intervals */ |
| if (usbhid->retry_delay == 0) { |
| usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */ |
| usbhid->stop_retry = jiffies + msecs_to_jiffies(1000); |
| } else if (usbhid->retry_delay < 100) |
| usbhid->retry_delay *= 2; |
| |
| if (time_after(jiffies, usbhid->stop_retry)) { |
| |
| /* Retries failed, so do a port reset unless we lack bandwidth*/ |
| if (!test_bit(HID_NO_BANDWIDTH, &usbhid->iofl) |
| && !test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) { |
| |
| schedule_work(&usbhid->reset_work); |
| goto done; |
| } |
| } |
| |
| mod_timer(&usbhid->io_retry, |
| jiffies + msecs_to_jiffies(usbhid->retry_delay)); |
| done: |
| spin_unlock_irqrestore(&usbhid->lock, flags); |
| } |
| |
| static void usbhid_mark_busy(struct usbhid_device *usbhid) |
| { |
| struct usb_interface *intf = usbhid->intf; |
| |
| usb_mark_last_busy(interface_to_usbdev(intf)); |
| } |
| |
| static int usbhid_restart_out_queue(struct usbhid_device *usbhid) |
| { |
| struct hid_device *hid = usb_get_intfdata(usbhid->intf); |
| int kicked; |
| int r; |
| |
| if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) || |
| test_bit(HID_SUSPENDED, &usbhid->iofl)) |
| return 0; |
| |
| if ((kicked = (usbhid->outhead != usbhid->outtail))) { |
| hid_dbg(hid, "Kicking head %d tail %d", usbhid->outhead, usbhid->outtail); |
| |
| /* Try to wake up from autosuspend... */ |
| r = usb_autopm_get_interface_async(usbhid->intf); |
| if (r < 0) |
| return r; |
| |
| /* |
| * If still suspended, don't submit. Submission will |
| * occur if/when resume drains the queue. |
| */ |
| if (test_bit(HID_SUSPENDED, &usbhid->iofl)) { |
| usb_autopm_put_interface_no_suspend(usbhid->intf); |
| return r; |
| } |
| |
| /* Asynchronously flush queue. */ |
| set_bit(HID_OUT_RUNNING, &usbhid->iofl); |
| if (hid_submit_out(hid)) { |
| clear_bit(HID_OUT_RUNNING, &usbhid->iofl); |
| usb_autopm_put_interface_async(usbhid->intf); |
| } |
| wake_up(&usbhid->wait); |
| } |
| return kicked; |
| } |
| |
| static int usbhid_restart_ctrl_queue(struct usbhid_device *usbhid) |
| { |
| struct hid_device *hid = usb_get_intfdata(usbhid->intf); |
| int kicked; |
| int r; |
| |
| WARN_ON(hid == NULL); |
| if (!hid || test_bit(HID_RESET_PENDING, &usbhid->iofl) || |
| test_bit(HID_SUSPENDED, &usbhid->iofl)) |
| return 0; |
| |
| if ((kicked = (usbhid->ctrlhead != usbhid->ctrltail))) { |
| hid_dbg(hid, "Kicking head %d tail %d", usbhid->ctrlhead, usbhid->ctrltail); |
| |
| /* Try to wake up from autosuspend... */ |
| r = usb_autopm_get_interface_async(usbhid->intf); |
| if (r < 0) |
| return r; |
| |
| /* |
| * If still suspended, don't submit. Submission will |
| * occur if/when resume drains the queue. |
| */ |
| if (test_bit(HID_SUSPENDED, &usbhid->iofl)) { |
| usb_autopm_put_interface_no_suspend(usbhid->intf); |
| return r; |
| } |
| |
| /* Asynchronously flush queue. */ |
| set_bit(HID_CTRL_RUNNING, &usbhid->iofl); |
| if (hid_submit_ctrl(hid)) { |
| clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); |
| usb_autopm_put_interface_async(usbhid->intf); |
| } |
| wake_up(&usbhid->wait); |
| } |
| return kicked; |
| } |
| |
| /* |
| * Input interrupt completion handler. |
| */ |
| |
| static void hid_irq_in(struct urb *urb) |
| { |
| struct hid_device *hid = urb->context; |
| struct usbhid_device *usbhid = hid->driver_data; |
| int status; |
| |
| switch (urb->status) { |
| case 0: /* success */ |
| usbhid->retry_delay = 0; |
| if (!test_bit(HID_OPENED, &usbhid->iofl)) |
| break; |
| usbhid_mark_busy(usbhid); |
| if (!test_bit(HID_RESUME_RUNNING, &usbhid->iofl)) { |
| hid_input_report(urb->context, HID_INPUT_REPORT, |
| urb->transfer_buffer, |
| urb->actual_length, 1); |
| /* |
| * autosuspend refused while keys are pressed |
| * because most keyboards don't wake up when |
| * a key is released |
| */ |
| if (hid_check_keys_pressed(hid)) |
| set_bit(HID_KEYS_PRESSED, &usbhid->iofl); |
| else |
| clear_bit(HID_KEYS_PRESSED, &usbhid->iofl); |
| } |
| break; |
| case -EPIPE: /* stall */ |
| usbhid_mark_busy(usbhid); |
| clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
| set_bit(HID_CLEAR_HALT, &usbhid->iofl); |
| schedule_work(&usbhid->reset_work); |
| return; |
| case -ECONNRESET: /* unlink */ |
| case -ENOENT: |
| case -ESHUTDOWN: /* unplug */ |
| clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
| return; |
| case -EILSEQ: /* protocol error or unplug */ |
| case -EPROTO: /* protocol error or unplug */ |
| case -ETIME: /* protocol error or unplug */ |
| case -ETIMEDOUT: /* Should never happen, but... */ |
| usbhid_mark_busy(usbhid); |
| clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
| hid_io_error(hid); |
| return; |
| default: /* error */ |
| hid_warn(urb->dev, "input irq status %d received\n", |
| urb->status); |
| } |
| |
| status = usb_submit_urb(urb, GFP_ATOMIC); |
| if (status) { |
| clear_bit(HID_IN_RUNNING, &usbhid->iofl); |
| if (status != -EPERM) { |
| hid_err(hid, "can't resubmit intr, %s-%s/input%d, status %d\n", |
| hid_to_usb_dev(hid)->bus->bus_name, |
| hid_to_usb_dev(hid)->devpath, |
| usbhid->ifnum, status); |
| hid_io_error(hid); |
| } |
| } |
| } |
| |
| static int hid_submit_out(struct hid_device *hid) |
| { |
| struct hid_report *report; |
| char *raw_report; |
| struct usbhid_device *usbhid = hid->driver_data; |
| int r; |
| |
| report = usbhid->out[usbhid->outtail].report; |
| raw_report = usbhid->out[usbhid->outtail].raw_report; |
| |
| usbhid->urbout->transfer_buffer_length = hid_report_len(report); |
| usbhid->urbout->dev = hid_to_usb_dev(hid); |
| if (raw_report) { |
| memcpy(usbhid->outbuf, raw_report, |
| usbhid->urbout->transfer_buffer_length); |
| kfree(raw_report); |
| usbhid->out[usbhid->outtail].raw_report = NULL; |
| } |
| |
| dbg_hid("submitting out urb\n"); |
| |
| r = usb_submit_urb(usbhid->urbout, GFP_ATOMIC); |
| if (r < 0) { |
| hid_err(hid, "usb_submit_urb(out) failed: %d\n", r); |
| return r; |
| } |
| usbhid->last_out = jiffies; |
| return 0; |
| } |
| |
| static int hid_submit_ctrl(struct hid_device *hid) |
| { |
| struct hid_report *report; |
| unsigned char dir; |
| char *raw_report; |
| int len, r; |
| struct usbhid_device *usbhid = hid->driver_data; |
| |
| report = usbhid->ctrl[usbhid->ctrltail].report; |
| raw_report = usbhid->ctrl[usbhid->ctrltail].raw_report; |
| dir = usbhid->ctrl[usbhid->ctrltail].dir; |
| |
| len = hid_report_len(report); |
| if (dir == USB_DIR_OUT) { |
| usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0); |
| usbhid->urbctrl->transfer_buffer_length = len; |
| if (raw_report) { |
| memcpy(usbhid->ctrlbuf, raw_report, len); |
| kfree(raw_report); |
| usbhid->ctrl[usbhid->ctrltail].raw_report = NULL; |
| } |
| } else { |
| int maxpacket, padlen; |
| |
| usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0); |
| maxpacket = usb_maxpacket(hid_to_usb_dev(hid), |
| usbhid->urbctrl->pipe, 0); |
| if (maxpacket > 0) { |
| padlen = DIV_ROUND_UP(len, maxpacket); |
| padlen *= maxpacket; |
| if (padlen > usbhid->bufsize) |
| padlen = usbhid->bufsize; |
| } else |
| padlen = 0; |
| usbhid->urbctrl->transfer_buffer_length = padlen; |
| } |
| usbhid->urbctrl->dev = hid_to_usb_dev(hid); |
| |
| usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir; |
| usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : |
| HID_REQ_GET_REPORT; |
| usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | |
| report->id); |
| usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum); |
| usbhid->cr->wLength = cpu_to_le16(len); |
| |
| dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n", |
| usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : |
| "Get_Report", |
| usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength); |
| |
| r = usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC); |
| if (r < 0) { |
| hid_err(hid, "usb_submit_urb(ctrl) failed: %d\n", r); |
| return r; |
| } |
| usbhid->last_ctrl = jiffies; |
| return 0; |
| } |
| |
| /* |
| * Output interrupt completion handler. |
| */ |
| |
| static void hid_irq_out(struct urb *urb) |
| { |
| struct hid_device *hid = urb->context; |
| struct usbhid_device *usbhid = hid->driver_data; |
| unsigned long flags; |
| int unplug = 0; |
| |
| switch (urb->status) { |
| case 0: /* success */ |
| break; |
| case -ESHUTDOWN: /* unplug */ |
| unplug = 1; |
| break; |
| case -EILSEQ: /* protocol error or unplug */ |
| case -EPROTO: /* protocol error or unplug */ |
| case -ECONNRESET: /* unlink */ |
| case -ENOENT: |
| break; |
| default: /* error */ |
| hid_warn(urb->dev, "output irq status %d received\n", |
| urb->status); |
| } |
| |
| spin_lock_irqsave(&usbhid->lock, flags); |
| |
| if (unplug) { |
| usbhid->outtail = usbhid->outhead; |
| } else { |
| usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1); |
| |
| if (usbhid->outhead != usbhid->outtail && |
| hid_submit_out(hid) == 0) { |
| /* Successfully submitted next urb in queue */ |
| spin_unlock_irqrestore(&usbhid->lock, flags); |
| return; |
| } |
| } |
| |
| clear_bit(HID_OUT_RUNNING, &usbhid->iofl); |
| spin_unlock_irqrestore(&usbhid->lock, flags); |
| usb_autopm_put_interface_async(usbhid->intf); |
| wake_up(&usbhid->wait); |
| } |
| |
| /* |
| * Control pipe completion handler. |
| */ |
| |
| static void hid_ctrl(struct urb *urb) |
| { |
| struct hid_device *hid = urb->context; |
| struct usbhid_device *usbhid = hid->driver_data; |
| unsigned long flags; |
| int unplug = 0, status = urb->status; |
| |
| switch (status) { |
| case 0: /* success */ |
| if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN) |
| hid_input_report(urb->context, |
| usbhid->ctrl[usbhid->ctrltail].report->type, |
| urb->transfer_buffer, urb->actual_length, 0); |
| break; |
| case -ESHUTDOWN: /* unplug */ |
| unplug = 1; |
| break; |
| case -EILSEQ: /* protocol error or unplug */ |
| case -EPROTO: /* protocol error or unplug */ |
| case -ECONNRESET: /* unlink */ |
| case -ENOENT: |
| case -EPIPE: /* report not available */ |
| break; |
| default: /* error */ |
| hid_warn(urb->dev, "ctrl urb status %d received\n", status); |
| } |
| |
| spin_lock_irqsave(&usbhid->lock, flags); |
| |
| if (unplug) { |
| usbhid->ctrltail = usbhid->ctrlhead; |
| } else { |
| usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1); |
| |
| if (usbhid->ctrlhead != usbhid->ctrltail && |
| hid_submit_ctrl(hid) == 0) { |
| /* Successfully submitted next urb in queue */ |
| spin_unlock_irqrestore(&usbhid->lock, flags); |
| return; |
| } |
| } |
| |
| clear_bit(HID_CTRL_RUNNING, &usbhid->iofl); |
| spin_unlock_irqrestore(&usbhid->lock, flags); |
| usb_autopm_put_interface_async(usbhid->intf); |
| wake_up(&usbhid->wait); |
| } |
| |
| static void __usbhid_submit_report(struct hid_device *hid, struct hid_report *report, |
| unsigned char dir) |
| { |
| int head; |
| struct usbhid_device *usbhid = hid->driver_data; |
| |
| if (((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN) || |
| test_bit(HID_DISCONNECTED, &usbhid->iofl)) |
| return; |
| |
| if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) { |
| if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) { |
| hid_warn(hid, "output queue full\n"); |
| return; |
| } |
| |
| usbhid->out[usbhid->outhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC); |
| if (!usbhid->out[usbhid->outhead].raw_report) { |
| hid_warn(hid, "output queueing failed\n"); |
| return; |
| } |
| hid_output_report(report, usbhid->out[usbhid->outhead].raw_report); |
| usbhid->out[usbhid->outhead].report = report; |
| usbhid->outhead = head; |
| |
| /* If the queue isn't running, restart it */ |
| if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl)) { |
| usbhid_restart_out_queue(usbhid); |
| |
| /* Otherwise see if an earlier request has timed out */ |
| } else if (time_after(jiffies, usbhid->last_out + HZ * 5)) { |
| |
| /* Prevent autosuspend following the unlink */ |
| usb_autopm_get_interface_no_resume(usbhid->intf); |
| |
| /* |
| * Prevent resubmission in case the URB completes |
| * before we can unlink it. We don't want to cancel |
| * the wrong transfer! |
| */ |
| usb_block_urb(usbhid->urbout); |
| |
| /* Drop lock to avoid deadlock if the callback runs */ |
| spin_unlock(&usbhid->lock); |
| |
| usb_unlink_urb(usbhid->urbout); |
| spin_lock(&usbhid->lock); |
| usb_unblock_urb(usbhid->urbout); |
| |
| /* Unlink might have stopped the queue */ |
| if (!test_bit(HID_OUT_RUNNING, &usbhid->iofl)) |
| usbhid_restart_out_queue(usbhid); |
| |
| /* Now we can allow autosuspend again */ |
| usb_autopm_put_interface_async(usbhid->intf); |
| } |
| return; |
| } |
| |
| if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) { |
| hid_warn(hid, "control queue full\n"); |
| return; |
| } |
| |
| if (dir == USB_DIR_OUT) { |
| usbhid->ctrl[usbhid->ctrlhead].raw_report = hid_alloc_report_buf(report, GFP_ATOMIC); |
| if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) { |
| hid_warn(hid, "control queueing failed\n"); |
| return; |
| } |
| hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report); |
| } |
| usbhid->ctrl[usbhid->ctrlhead].report = report; |
| usbhid->ctrl[usbhid->ctrlhead].dir = dir; |
| usbhid->ctrlhead = head; |
| |
| /* If the queue isn't running, restart it */ |
| if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) { |
| usbhid_restart_ctrl_queue(usbhid); |
| |
| /* Otherwise see if an earlier request has timed out */ |
| } else if (time_after(jiffies, usbhid->last_ctrl + HZ * 5)) { |
| |
| /* Prevent autosuspend following the unlink */ |
| usb_autopm_get_interface_no_resume(usbhid->intf); |
| |
| /* |
| * Prevent resubmission in case the URB completes |
| * before we can unlink it. We don't want to cancel |
| * the wrong transfer! |
| */ |
| usb_block_urb(usbhid->urbctrl); |
| |
| /* Drop lock to avoid deadlock if the callback runs */ |
| spin_unlock(&usbhid->lock); |
| |
| usb_unlink_urb(usbhid->urbctrl); |
| spin_lock(&usbhid->lock); |
| usb_unblock_urb(usbhid->urbctrl); |
| |
| /* Unlink might have stopped the queue */ |
| if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) |
| usbhid_restart_ctrl_queue(usbhid); |
| |
| /* Now we can allow autosuspend again */ |
| usb_autopm_put_interface_async(usbhid->intf); |
| } |
| } |
| |
| static void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir) |
| { |
| struct usbhid_device *usbhid = hid->driver_data; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&usbhid->lock, flags); |
| __usbhid_submit_report(hid, report, dir); |
| spin_unlock_irqrestore(&usbhid->lock, flags); |
| } |
| |
| static int usbhid_wait_io(struct hid_device *hid) |
| { |
| struct usbhid_device *usbhid = hid->driver_data; |
| |
| if (!wait_event_timeout(usbhid->wait, |
| (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) && |
| !test_bit(HID_OUT_RUNNING, &usbhid->iofl)), |
| 10*HZ)) { |
| dbg_hid("timeout waiting for ctrl or out queue to clear\n"); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle) |
| { |
| return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
| HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report, |
| ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT); |
| } |
| |
| static int hid_get_class_descriptor(struct usb_device *dev, int ifnum, |
| unsigned char type, void *buf, int size) |
| { |
| int result, retries = 4; |
| |
| memset(buf, 0, size); |
| |
| do { |
| result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), |
| USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN, |
| (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT); |
| retries--; |
| } while (result < size && retries); |
| return result; |
| } |
| |
| static int usbhid_open(struct hid_device *hid) |
| { |
| struct usbhid_device *usbhid = hid->driver_data; |
| int res; |
| |
| mutex_lock(&usbhid->mutex); |
| |
| set_bit(HID_OPENED, &usbhid->iofl); |
| |
| if (hid->quirks & HID_QUIRK_ALWAYS_POLL) { |
| res = 0; |
| goto Done; |
| } |
| |
| res = usb_autopm_get_interface(usbhid->intf); |
| /* the device must be awake to reliably request remote wakeup */ |
| if (res < 0) { |
| clear_bit(HID_OPENED, &usbhid->iofl); |
| res = -EIO; |
| goto Done; |
| } |
| |
| usbhid->intf->needs_remote_wakeup = 1; |
| |
| set_bit(HID_RESUME_RUNNING, &usbhid->iofl); |
| set_bit(HID_IN_POLLING, &usbhid->iofl); |
| |
| res = hid_start_in(hid); |
| if (res) { |
| if (res != -ENOSPC) { |
| hid_io_error(hid); |
| res = 0; |
| } else { |
| /* no use opening if resources are insufficient */ |
| res = -EBUSY; |
| clear_bit(HID_OPENED, &usbhid->iofl); |
| clear_bit(HID_IN_POLLING, &usbhid->iofl); |
| usbhid->intf->needs_remote_wakeup = 0; |
| } |
| } |
| |
| usb_autopm_put_interface(usbhid->intf); |
| |
| /* |
| * In case events are generated while nobody was listening, |
| * some are released when the device is re-opened. |
| * Wait 50 msec for the queue to empty before allowing events |
| * to go through hid. |
| */ |
| if (res == 0) |
| msleep(50); |
| |
| clear_bit(HID_RESUME_RUNNING, &usbhid->iofl); |
| |
| Done: |
| mutex_unlock(&usbhid->mutex); |
| return res; |
| } |
| |
| static void usbhid_close(struct hid_device *hid) |
| { |
| struct usbhid_device *usbhid = hid->driver_data; |
| |
| mutex_lock(&usbhid->mutex); |
| |
| /* |
| * Make sure we don't restart data acquisition due to |
| * a resumption we no longer care about by avoiding racing |
| * with hid_start_in(). |
| */ |
| spin_lock_irq(&usbhid->lock); |
| clear_bit(HID_OPENED, &usbhid->iofl); |
| if (!(hid->quirks & HID_QUIRK_ALWAYS_POLL)) |
| clear_bit(HID_IN_POLLING, &usbhid->iofl); |
| spin_unlock_irq(&usbhid->lock); |
| |
| if (!(hid->quirks & HID_QUIRK_ALWAYS_POLL)) { |
| hid_cancel_delayed_stuff(usbhid); |
| usb_kill_urb(usbhid->urbin); |
| usbhid->intf->needs_remote_wakeup = 0; |
| } |
| |
| mutex_unlock(&usbhid->mutex); |
| } |
| |
| /* |
| * Initialize all reports |
| */ |
| |
| void usbhid_init_reports(struct hid_device *hid) |
| { |
| struct hid_report *report; |
| struct usbhid_device *usbhid = hid->driver_data; |
| struct hid_report_enum *report_enum; |
| int err, ret; |
| |
| report_enum = &hid->report_enum[HID_INPUT_REPORT]; |
| list_for_each_entry(report, &report_enum->report_list, list) |
| usbhid_submit_report(hid, report, USB_DIR_IN); |
| |
| report_enum = &hid->report_enum[HID_FEATURE_REPORT]; |
| list_for_each_entry(report, &report_enum->report_list, list) |
| usbhid_submit_report(hid, report, USB_DIR_IN); |
| |
| err = 0; |
| ret = usbhid_wait_io(hid); |
| while (ret) { |
| err |= ret; |
| if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) |
| usb_kill_urb(usbhid->urbctrl); |
| if (test_bit(HID_OUT_RUNNING, &usbhid->iofl)) |
| usb_kill_urb(usbhid->urbout); |
| ret = usbhid_wait_io(hid); |
| } |
| |
| if (err) |
| hid_warn(hid, "timeout initializing reports\n"); |
| } |
| |
| /* |
| * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01). |
| */ |
| static int hid_find_field_early(struct hid_device *hid, unsigned int page, |
| unsigned int hid_code, struct hid_field **pfield) |
| { |
| struct hid_report *report; |
| struct hid_field *field; |
| struct hid_usage *usage; |
| int i, j; |
| |
| list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { |
| for (i = 0; i < report->maxfield; i++) { |
| field = report->field[i]; |
| for (j = 0; j < field->maxusage; j++) { |
| usage = &field->usage[j]; |
| if ((usage->hid & HID_USAGE_PAGE) == page && |
| (usage->hid & 0xFFFF) == hid_code) { |
| *pfield = field; |
| return j; |
| } |
| } |
| } |
| } |
| return -1; |
| } |
| |
| static void usbhid_set_leds(struct hid_device *hid) |
| { |
| struct hid_field *field; |
| int offset; |
| |
| if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) { |
| hid_set_field(field, offset, 0); |
| usbhid_submit_report(hid, field->report, USB_DIR_OUT); |
| } |
| } |
| |
| /* |
| * Traverse the supplied list of reports and find the longest |
| */ |
| static void hid_find_max_report(struct hid_device *hid, unsigned int type, |
| unsigned int *max) |
| { |
| struct hid_report *report; |
| unsigned int size; |
| |
| list_for_each_entry(report, &hid->report_enum[type].report_list, list) { |
| size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered; |
| if (*max < size) |
| *max = size; |
| } |
| } |
| |
| static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid) |
| { |
| struct usbhid_device *usbhid = hid->driver_data; |
| |
| usbhid->inbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL, |
| &usbhid->inbuf_dma); |
| usbhid->outbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL, |
| &usbhid->outbuf_dma); |
| usbhid->cr = kmalloc(sizeof(*usbhid->cr), GFP_KERNEL); |
| usbhid->ctrlbuf = usb_alloc_coherent(dev, usbhid->bufsize, GFP_KERNEL, |
| &usbhid->ctrlbuf_dma); |
| if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr || |
| !usbhid->ctrlbuf) |
| return -1; |
| |
| return 0; |
| } |
| |
| static int usbhid_get_raw_report(struct hid_device *hid, |
| unsigned char report_number, __u8 *buf, size_t count, |
| unsigned char report_type) |
| { |
| struct usbhid_device *usbhid = hid->driver_data; |
| struct usb_device *dev = hid_to_usb_dev(hid); |
| struct usb_interface *intf = usbhid->intf; |
| struct usb_host_interface *interface = intf->cur_altsetting; |
| int skipped_report_id = 0; |
| int ret; |
| |
| /* Byte 0 is the report number. Report data starts at byte 1.*/ |
| buf[0] = report_number; |
| if (report_number == 0x0) { |
| /* Offset the return buffer by 1, so that the report ID |
| will remain in byte 0. */ |
| buf++; |
| count--; |
| skipped_report_id = 1; |
| } |
| ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), |
| HID_REQ_GET_REPORT, |
| USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, |
| ((report_type + 1) << 8) | report_number, |
| interface->desc.bInterfaceNumber, buf, count, |
| USB_CTRL_SET_TIMEOUT); |
| |
| /* count also the report id */ |
| if (ret > 0 && skipped_report_id) |
| ret++; |
| |
| return ret; |
| } |
| |
| static int usbhid_set_raw_report(struct hid_device *hid, unsigned int reportnum, |
| __u8 *buf, size_t count, unsigned char rtype) |
| { |
| struct usbhid_device *usbhid = hid->driver_data; |
| struct usb_device *dev = hid_to_usb_dev(hid); |
| struct usb_interface *intf = usbhid->intf; |
| struct usb_host_interface *interface = intf->cur_altsetting; |
| int ret, skipped_report_id = 0; |
| |
| /* Byte 0 is the report number. Report data starts at byte 1.*/ |
| if ((rtype == HID_OUTPUT_REPORT) && |
| (hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORT_ID)) |
| buf[0] = 0; |
| else |
| buf[0] = reportnum; |
| |
| if (buf[0] == 0x0) { |
| /* Don't send the Report ID */ |
| buf++; |
| count--; |
| skipped_report_id = 1; |
| } |
| |
| ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
| HID_REQ_SET_REPORT, |
| USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, |
| ((rtype + 1) << 8) | reportnum, |
| interface->desc.bInterfaceNumber, buf, count, |
| USB_CTRL_SET_TIMEOUT); |
| /* count also the report id, if this was a numbered report. */ |
| if (ret > 0 && skipped_report_id) |
| ret++; |
| |
| return ret; |
| } |
| |
| static int usbhid_output_report(struct hid_device *hid, __u8 *buf, size_t count) |
| { |
| struct usbhid_device *usbhid = hid->driver_data; |
| struct usb_device *dev = hid_to_usb_dev(hid); |
| int actual_length, skipped_report_id = 0, ret; |
| |
| if (!usbhid->urbout) |
| return -ENOSYS; |
| |
| if (buf[0] == 0x0) { |
| /* Don't send the Report ID */ |
| buf++; |
| count--; |
| skipped_report_id = 1; |
| } |
| |
| ret = usb_interrupt_msg(dev, usbhid->urbout->pipe, |
| buf, count, &actual_length, |
| USB_CTRL_SET_TIMEOUT); |
| /* return the number of bytes transferred */ |
| if (ret == 0) { |
| ret = actual_length; |
| /* count also the report id */ |
| if (skipped_report_id) |
| ret++; |
| } |
| |
| return ret; |
| } |
| |
| static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid) |
| { |
| struct usbhid_device *usbhid = hid->driver_data; |
| |
| usb_free_coherent(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma); |
| usb_free_coherent(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma); |
| kfree(usbhid->cr); |
| usb_free_coherent(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma); |
| } |
| |
| static int usbhid_parse(struct hid_device *hid) |
| { |
| struct usb_interface *intf = to_usb_interface(hid->dev.parent); |
| struct usb_host_interface *interface = intf->cur_altsetting; |
| struct usb_device *dev = interface_to_usbdev (intf); |
| struct hid_descriptor *hdesc; |
| u32 quirks = 0; |
| unsigned int rsize = 0; |
| char *rdesc; |
| int ret, n; |
| int num_descriptors; |
| size_t offset = offsetof(struct hid_descriptor, desc); |
| |
| quirks = hid_lookup_quirk(hid); |
| |
| if (quirks & HID_QUIRK_IGNORE) |
| return -ENODEV; |
| |
| /* Many keyboards and mice don't like to be polled for reports, |
| * so we will always set the HID_QUIRK_NOGET flag for them. */ |
| if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) { |
| if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD || |
| interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE) |
| quirks |= HID_QUIRK_NOGET; |
| } |
| |
| if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) && |
| (!interface->desc.bNumEndpoints || |
| usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) { |
| dbg_hid("class descriptor not present\n"); |
| return -ENODEV; |
| } |
| |
| if (hdesc->bLength < sizeof(struct hid_descriptor)) { |
| dbg_hid("hid descriptor is too short\n"); |
| return -EINVAL; |
| } |
| |
| hid->version = le16_to_cpu(hdesc->bcdHID); |
| hid->country = hdesc->bCountryCode; |
| |
| num_descriptors = min_t(int, hdesc->bNumDescriptors, |
| (hdesc->bLength - offset) / sizeof(struct hid_class_descriptor)); |
| |
| for (n = 0; n < num_descriptors; n++) |
| if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT) |
| rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength); |
| |
| if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) { |
| dbg_hid("weird size of report descriptor (%u)\n", rsize); |
| return -EINVAL; |
| } |
| |
| rdesc = kmalloc(rsize, GFP_KERNEL); |
| if (!rdesc) |
| return -ENOMEM; |
| |
| hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0); |
| |
| ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber, |
| HID_DT_REPORT, rdesc, rsize); |
| if (ret < 0) { |
| dbg_hid("reading report descriptor failed\n"); |
| kfree(rdesc); |
| goto err; |
| } |
| |
| ret = hid_parse_report(hid, rdesc, rsize); |
| kfree(rdesc); |
| if (ret) { |
| dbg_hid("parsing report descriptor failed\n"); |
| goto err; |
| } |
| |
| hid->quirks |= quirks; |
| |
| return 0; |
| err: |
| return ret; |
| } |
| |
| static int usbhid_start(struct hid_device *hid) |
| { |
| struct usb_interface *intf = to_usb_interface(hid->dev.parent); |
| struct usb_host_interface *interface = intf->cur_altsetting; |
| struct usb_device *dev = interface_to_usbdev(intf); |
| struct usbhid_device *usbhid = hid->driver_data; |
| unsigned int n, insize = 0; |
| int ret; |
| |
| mutex_lock(&usbhid->mutex); |
| |
| clear_bit(HID_DISCONNECTED, &usbhid->iofl); |
| |
| usbhid->bufsize = HID_MIN_BUFFER_SIZE; |
| hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize); |
| hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize); |
| hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize); |
| |
| if (usbhid->bufsize > HID_MAX_BUFFER_SIZE) |
| usbhid->bufsize = HID_MAX_BUFFER_SIZE; |
| |
| hid_find_max_report(hid, HID_INPUT_REPORT, &insize); |
| |
| if (insize > HID_MAX_BUFFER_SIZE) |
| insize = HID_MAX_BUFFER_SIZE; |
| |
| if (hid_alloc_buffers(dev, hid)) { |
| ret = -ENOMEM; |
| goto fail; |
| } |
| |
| for (n = 0; n < interface->desc.bNumEndpoints; n++) { |
| struct usb_endpoint_descriptor *endpoint; |
| int pipe; |
| int interval; |
| |
| endpoint = &interface->endpoint[n].desc; |
| if (!usb_endpoint_xfer_int(endpoint)) |
| continue; |
| |
| interval = endpoint->bInterval; |
| |
| /* Some vendors give fullspeed interval on highspeed devides */ |
| if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL && |
| dev->speed == USB_SPEED_HIGH) { |
| interval = fls(endpoint->bInterval*8); |
| pr_info("%s: Fixing fullspeed to highspeed interval: %d -> %d\n", |
| hid->name, endpoint->bInterval, interval); |
| } |
| |
| /* Change the polling interval of mice, joysticks |
| * and keyboards. |
| */ |
| switch (hid->collection->usage) { |
| case HID_GD_MOUSE: |
| if (hid_mousepoll_interval > 0) |
| interval = hid_mousepoll_interval; |
| break; |
| case HID_GD_JOYSTICK: |
| if (hid_jspoll_interval > 0) |
| interval = hid_jspoll_interval; |
| break; |
| case HID_GD_KEYBOARD: |
| if (hid_kbpoll_interval > 0) |
| interval = hid_kbpoll_interval; |
| break; |
| } |
| |
| ret = -ENOMEM; |
| if (usb_endpoint_dir_in(endpoint)) { |
| if (usbhid->urbin) |
| continue; |
| if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL))) |
| goto fail; |
| pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress); |
| usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize, |
| hid_irq_in, hid, interval); |
| usbhid->urbin->transfer_dma = usbhid->inbuf_dma; |
| usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| } else { |
| if (usbhid->urbout) |
| continue; |
| if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL))) |
| goto fail; |
| pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress); |
| usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0, |
| hid_irq_out, hid, interval); |
| usbhid->urbout->transfer_dma = usbhid->outbuf_dma; |
| usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| } |
| } |
| |
| usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL); |
| if (!usbhid->urbctrl) { |
| ret = -ENOMEM; |
| goto fail; |
| } |
| |
| usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr, |
| usbhid->ctrlbuf, 1, hid_ctrl, hid); |
| usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma; |
| usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| |
| set_bit(HID_STARTED, &usbhid->iofl); |
| |
| if (hid->quirks & HID_QUIRK_ALWAYS_POLL) { |
| ret = usb_autopm_get_interface(usbhid->intf); |
| if (ret) |
| goto fail; |
| set_bit(HID_IN_POLLING, &usbhid->iofl); |
| usbhid->intf->needs_remote_wakeup = 1; |
| ret = hid_start_in(hid); |
| if (ret) { |
| dev_err(&hid->dev, |
| "failed to start in urb: %d\n", ret); |
| } |
| usb_autopm_put_interface(usbhid->intf); |
| } |
| |
| /* Some keyboards don't work until their LEDs have been set. |
| * Since BIOSes do set the LEDs, it must be safe for any device |
| * that supports the keyboard boot protocol. |
| * In addition, enable remote wakeup by default for all keyboard |
| * devices supporting the boot protocol. |
| */ |
| if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT && |
| interface->desc.bInterfaceProtocol == |
| USB_INTERFACE_PROTOCOL_KEYBOARD) { |
| usbhid_set_leds(hid); |
| device_set_wakeup_enable(&dev->dev, 1); |
| } |
| |
| mutex_unlock(&usbhid->mutex); |
| return 0; |
| |
| fail: |
| usb_free_urb(usbhid->urbin); |
| usb_free_urb(usbhid->urbout); |
| usb_free_urb(usbhid->urbctrl); |
| usbhid->urbin = NULL; |
| usbhid->urbout = NULL; |
| usbhid->urbctrl = NULL; |
| hid_free_buffers(dev, hid); |
| mutex_unlock(&usbhid->mutex); |
| return ret; |
| } |
| |
| static void usbhid_stop(struct hid_device *hid) |
| { |
| struct usbhid_device *usbhid = hid->driver_data; |
| |
| if (WARN_ON(!usbhid)) |
| return; |
| |
| if (hid->quirks & HID_QUIRK_ALWAYS_POLL) { |
| clear_bit(HID_IN_POLLING, &usbhid->iofl); |
| usbhid->intf->needs_remote_wakeup = 0; |
| } |
| |
| mutex_lock(&usbhid->mutex); |
| |
| clear_bit(HID_STARTED, &usbhid->iofl); |
| spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */ |
| set_bit(HID_DISCONNECTED, &usbhid->iofl); |
| spin_unlock_irq(&usbhid->lock); |
| usb_kill_urb(usbhid->urbin); |
| usb_kill_urb(usbhid->urbout); |
| usb_kill_urb(usbhid->urbctrl); |
| |
| hid_cancel_delayed_stuff(usbhid); |
| |
| hid->claimed = 0; |
| |
| usb_free_urb(usbhid->urbin); |
| usb_free_urb(usbhid->urbctrl); |
| usb_free_urb(usbhid->urbout); |
| usbhid->urbin = NULL; /* don't mess up next start */ |
| usbhid->urbctrl = NULL; |
| usbhid->urbout = NULL; |
| |
| hid_free_buffers(hid_to_usb_dev(hid), hid); |
| |
| mutex_unlock(&usbhid->mutex); |
| } |
| |
| static int usbhid_power(struct hid_device *hid, int lvl) |
| { |
| struct usbhid_device *usbhid = hid->driver_data; |
| int r = 0; |
| |
| switch (lvl) { |
| case PM_HINT_FULLON: |
| r = usb_autopm_get_interface(usbhid->intf); |
| break; |
| |
| case PM_HINT_NORMAL: |
| usb_autopm_put_interface(usbhid->intf); |
| break; |
| } |
| |
| return r; |
| } |
| |
| static void usbhid_request(struct hid_device *hid, struct hid_report *rep, int reqtype) |
| { |
| switch (reqtype) { |
| case HID_REQ_GET_REPORT: |
| usbhid_submit_report(hid, rep, USB_DIR_IN); |
| break; |
| case HID_REQ_SET_REPORT: |
| usbhid_submit_report(hid, rep, USB_DIR_OUT); |
| break; |
| } |
| } |
| |
| static int usbhid_raw_request(struct hid_device *hid, unsigned char reportnum, |
| __u8 *buf, size_t len, unsigned char rtype, |
| int reqtype) |
| { |
| switch (reqtype) { |
| case HID_REQ_GET_REPORT: |
| return usbhid_get_raw_report(hid, reportnum, buf, len, rtype); |
| case HID_REQ_SET_REPORT: |
| return usbhid_set_raw_report(hid, reportnum, buf, len, rtype); |
| default: |
| return -EIO; |
| } |
| } |
| |
| static int usbhid_idle(struct hid_device *hid, int report, int idle, |
| int reqtype) |
| { |
| struct usb_device *dev = hid_to_usb_dev(hid); |
| struct usb_interface *intf = to_usb_interface(hid->dev.parent); |
| struct usb_host_interface *interface = intf->cur_altsetting; |
| int ifnum = interface->desc.bInterfaceNumber; |
| |
| if (reqtype != HID_REQ_SET_IDLE) |
| return -EINVAL; |
| |
| return hid_set_idle(dev, ifnum, report, idle); |
| } |
| |
| static bool usbhid_may_wakeup(struct hid_device *hid) |
| { |
| struct usb_device *dev = hid_to_usb_dev(hid); |
| |
| return device_may_wakeup(&dev->dev); |
| } |
| |
| struct hid_ll_driver usb_hid_driver = { |
| .parse = usbhid_parse, |
| .start = usbhid_start, |
| .stop = usbhid_stop, |
| .open = usbhid_open, |
| .close = usbhid_close, |
| .power = usbhid_power, |
| .request = usbhid_request, |
| .wait = usbhid_wait_io, |
| .raw_request = usbhid_raw_request, |
| .output_report = usbhid_output_report, |
| .idle = usbhid_idle, |
| .may_wakeup = usbhid_may_wakeup, |
| }; |
| EXPORT_SYMBOL_GPL(usb_hid_driver); |
| |
| static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *id) |
| { |
| struct usb_host_interface *interface = intf->cur_altsetting; |
| struct usb_device *dev = interface_to_usbdev(intf); |
| struct usbhid_device *usbhid; |
| struct hid_device *hid; |
| unsigned int n, has_in = 0; |
| size_t len; |
| int ret; |
| |
| dbg_hid("HID probe called for ifnum %d\n", |
| intf->altsetting->desc.bInterfaceNumber); |
| |
| for (n = 0; n < interface->desc.bNumEndpoints; n++) |
| if (usb_endpoint_is_int_in(&interface->endpoint[n].desc)) |
| has_in++; |
| if (!has_in) { |
| hid_err(intf, "couldn't find an input interrupt endpoint\n"); |
| return -ENODEV; |
| } |
| |
| hid = hid_allocate_device(); |
| if (IS_ERR(hid)) |
| return PTR_ERR(hid); |
| |
| usb_set_intfdata(intf, hid); |
| hid->ll_driver = &usb_hid_driver; |
| hid->ff_init = hid_pidff_init; |
| #ifdef CONFIG_USB_HIDDEV |
| hid->hiddev_connect = hiddev_connect; |
| hid->hiddev_disconnect = hiddev_disconnect; |
| hid->hiddev_hid_event = hiddev_hid_event; |
| hid->hiddev_report_event = hiddev_report_event; |
| #endif |
| hid->dev.parent = &intf->dev; |
| hid->bus = BUS_USB; |
| hid->vendor = le16_to_cpu(dev->descriptor.idVendor); |
| hid->product = le16_to_cpu(dev->descriptor.idProduct); |
| hid->version = le16_to_cpu(dev->descriptor.bcdDevice); |
| hid->name[0] = 0; |
| if (intf->cur_altsetting->desc.bInterfaceProtocol == |
| USB_INTERFACE_PROTOCOL_MOUSE) |
| hid->type = HID_TYPE_USBMOUSE; |
| else if (intf->cur_altsetting->desc.bInterfaceProtocol == 0) |
| hid->type = HID_TYPE_USBNONE; |
| |
| if (dev->manufacturer) |
| strlcpy(hid->name, dev->manufacturer, sizeof(hid->name)); |
| |
| if (dev->product) { |
| if (dev->manufacturer) |
| strlcat(hid->name, " ", sizeof(hid->name)); |
| strlcat(hid->name, dev->product, sizeof(hid->name)); |
| } |
| |
| if (!strlen(hid->name)) |
| snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x", |
| le16_to_cpu(dev->descriptor.idVendor), |
| le16_to_cpu(dev->descriptor.idProduct)); |
| |
| usb_make_path(dev, hid->phys, sizeof(hid->phys)); |
| strlcat(hid->phys, "/input", sizeof(hid->phys)); |
| len = strlen(hid->phys); |
| if (len < sizeof(hid->phys) - 1) |
| snprintf(hid->phys + len, sizeof(hid->phys) - len, |
| "%d", intf->altsetting[0].desc.bInterfaceNumber); |
| |
| if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0) |
| hid->uniq[0] = 0; |
| |
| usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL); |
| if (usbhid == NULL) { |
| ret = -ENOMEM; |
| goto err; |
| } |
| |
| hid->driver_data = usbhid; |
| usbhid->hid = hid; |
| usbhid->intf = intf; |
| usbhid->ifnum = interface->desc.bInterfaceNumber; |
| |
| init_waitqueue_head(&usbhid->wait); |
| INIT_WORK(&usbhid->reset_work, hid_reset); |
| timer_setup(&usbhid->io_retry, hid_retry_timeout, 0); |
| spin_lock_init(&usbhid->lock); |
| mutex_init(&usbhid->mutex); |
| |
| ret = hid_add_device(hid); |
| if (ret) { |
| if (ret != -ENODEV) |
| hid_err(intf, "can't add hid device: %d\n", ret); |
| goto err_free; |
| } |
| |
| return 0; |
| err_free: |
| kfree(usbhid); |
| err: |
| hid_destroy_device(hid); |
| return ret; |
| } |
| |
| static void usbhid_disconnect(struct usb_interface *intf) |
| { |
| struct hid_device *hid = usb_get_intfdata(intf); |
| struct usbhid_device *usbhid; |
| |
| if (WARN_ON(!hid)) |
| return; |
| |
| usbhid = hid->driver_data; |
| spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */ |
| set_bit(HID_DISCONNECTED, &usbhid->iofl); |
| spin_unlock_irq(&usbhid->lock); |
| hid_destroy_device(hid); |
| kfree(usbhid); |
| } |
| |
| static void hid_cancel_delayed_stuff(struct usbhid_device *usbhid) |
| { |
| del_timer_sync(&usbhid->io_retry); |
| cancel_work_sync(&usbhid->reset_work); |
| } |
| |
| static void hid_cease_io(struct usbhid_device *usbhid) |
| { |
| del_timer_sync(&usbhid->io_retry); |
| usb_kill_urb(usbhid->urbin); |
| usb_kill_urb(usbhid->urbctrl); |
| usb_kill_urb(usbhid->urbout); |
| } |
| |
| static void hid_restart_io(struct hid_device *hid) |
| { |
| struct usbhid_device *usbhid = hid->driver_data; |
| int clear_halt = test_bit(HID_CLEAR_HALT, &usbhid->iofl); |
| int reset_pending = test_bit(HID_RESET_PENDING, &usbhid->iofl); |
| |
| spin_lock_irq(&usbhid->lock); |
| clear_bit(HID_SUSPENDED, &usbhid->iofl); |
| usbhid_mark_busy(usbhid); |
| |
| if (clear_halt || reset_pending) |
| schedule_work(&usbhid->reset_work); |
| usbhid->retry_delay = 0; |
| spin_unlock_irq(&usbhid->lock); |
| |
| if (reset_pending || !test_bit(HID_STARTED, &usbhid->iofl)) |
| return; |
| |
| if (!clear_halt) { |
| if (hid_start_in(hid) < 0) |
| hid_io_error(hid); |
| } |
| |
| spin_lock_irq(&usbhid->lock); |
| if (usbhid->urbout && !test_bit(HID_OUT_RUNNING, &usbhid->iofl)) |
| usbhid_restart_out_queue(usbhid); |
| if (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl)) |
| usbhid_restart_ctrl_queue(usbhid); |
| spin_unlock_irq(&usbhid->lock); |
| } |
| |
| /* Treat USB reset pretty much the same as suspend/resume */ |
| static int hid_pre_reset(struct usb_interface *intf) |
| { |
| struct hid_device *hid = usb_get_intfdata(intf); |
| struct usbhid_device *usbhid = hid->driver_data; |
| |
| spin_lock_irq(&usbhid->lock); |
| set_bit(HID_RESET_PENDING, &usbhid->iofl); |
| spin_unlock_irq(&usbhid->lock); |
| hid_cease_io(usbhid); |
| |
| return 0; |
| } |
| |
| /* Same routine used for post_reset and reset_resume */ |
| static int hid_post_reset(struct usb_interface *intf) |
| { |
| struct usb_device *dev = interface_to_usbdev (intf); |
| struct hid_device *hid = usb_get_intfdata(intf); |
| struct usbhid_device *usbhid = hid->driver_data; |
| struct usb_host_interface *interface = intf->cur_altsetting; |
| int status; |
| char *rdesc; |
| |
| /* Fetch and examine the HID report descriptor. If this |
| * has changed, then rebind. Since usbcore's check of the |
| * configuration descriptors passed, we already know that |
| * the size of the HID report descriptor has not changed. |
| */ |
| rdesc = kmalloc(hid->dev_rsize, GFP_KERNEL); |
| if (!rdesc) |
| return -ENOMEM; |
| |
| status = hid_get_class_descriptor(dev, |
| interface->desc.bInterfaceNumber, |
| HID_DT_REPORT, rdesc, hid->dev_rsize); |
| if (status < 0) { |
| dbg_hid("reading report descriptor failed (post_reset)\n"); |
| kfree(rdesc); |
| return status; |
| } |
| status = memcmp(rdesc, hid->dev_rdesc, hid->dev_rsize); |
| kfree(rdesc); |
| if (status != 0) { |
| dbg_hid("report descriptor changed\n"); |
| return -EPERM; |
| } |
| |
| /* No need to do another reset or clear a halted endpoint */ |
| spin_lock_irq(&usbhid->lock); |
| clear_bit(HID_RESET_PENDING, &usbhid->iofl); |
| clear_bit(HID_CLEAR_HALT, &usbhid->iofl); |
| spin_unlock_irq(&usbhid->lock); |
| hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0); |
| |
| hid_restart_io(hid); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM |
| static int hid_resume_common(struct hid_device *hid, bool driver_suspended) |
| { |
| int status = 0; |
| |
| hid_restart_io(hid); |
| if (driver_suspended && hid->driver && hid->driver->resume) |
| status = hid->driver->resume(hid); |
| return status; |
| } |
| |
| static int hid_suspend(struct usb_interface *intf, pm_message_t message) |
| { |
| struct hid_device *hid = usb_get_intfdata(intf); |
| struct usbhid_device *usbhid = hid->driver_data; |
| int status = 0; |
| bool driver_suspended = false; |
| unsigned int ledcount; |
| |
| if (PMSG_IS_AUTO(message)) { |
| ledcount = hidinput_count_leds(hid); |
| spin_lock_irq(&usbhid->lock); /* Sync with error handler */ |
| if (!test_bit(HID_RESET_PENDING, &usbhid->iofl) |
| && !test_bit(HID_CLEAR_HALT, &usbhid->iofl) |
| && !test_bit(HID_OUT_RUNNING, &usbhid->iofl) |
| && !test_bit(HID_CTRL_RUNNING, &usbhid->iofl) |
| && !test_bit(HID_KEYS_PRESSED, &usbhid->iofl) |
| && (!ledcount || ignoreled)) |
| { |
| set_bit(HID_SUSPENDED, &usbhid->iofl); |
| spin_unlock_irq(&usbhid->lock); |
| if (hid->driver && hid->driver->suspend) { |
| status = hid->driver->suspend(hid, message); |
| if (status < 0) |
| goto failed; |
| } |
| driver_suspended = true; |
| } else { |
| usbhid_mark_busy(usbhid); |
| spin_unlock_irq(&usbhid->lock); |
| return -EBUSY; |
| } |
| |
| } else { |
| /* TODO: resume() might need to handle suspend failure */ |
| if (hid->driver && hid->driver->suspend) |
| status = hid->driver->suspend(hid, message); |
| driver_suspended = true; |
| spin_lock_irq(&usbhid->lock); |
| set_bit(HID_SUSPENDED, &usbhid->iofl); |
| spin_unlock_irq(&usbhid->lock); |
| if (usbhid_wait_io(hid) < 0) |
| status = -EIO; |
| } |
| |
| hid_cancel_delayed_stuff(usbhid); |
| hid_cease_io(usbhid); |
| |
| if (PMSG_IS_AUTO(message) && test_bit(HID_KEYS_PRESSED, &usbhid->iofl)) { |
| /* lost race against keypresses */ |
| status = -EBUSY; |
| goto failed; |
| } |
| dev_dbg(&intf->dev, "suspend\n"); |
| return status; |
| |
| failed: |
| hid_resume_common(hid, driver_suspended); |
| return status; |
| } |
| |
| static int hid_resume(struct usb_interface *intf) |
| { |
| struct hid_device *hid = usb_get_intfdata (intf); |
| int status; |
| |
| status = hid_resume_common(hid, true); |
| dev_dbg(&intf->dev, "resume status %d\n", status); |
| return 0; |
| } |
| |
| static int hid_reset_resume(struct usb_interface *intf) |
| { |
| struct hid_device *hid = usb_get_intfdata(intf); |
| int status; |
| |
| status = hid_post_reset(intf); |
| if (status >= 0 && hid->driver && hid->driver->reset_resume) { |
| int ret = hid->driver->reset_resume(hid); |
| if (ret < 0) |
| status = ret; |
| } |
| return status; |
| } |
| |
| #endif /* CONFIG_PM */ |
| |
| static const struct usb_device_id hid_usb_ids[] = { |
| { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS, |
| .bInterfaceClass = USB_INTERFACE_CLASS_HID }, |
| { } /* Terminating entry */ |
| }; |
| |
| MODULE_DEVICE_TABLE (usb, hid_usb_ids); |
| |
| static struct usb_driver hid_driver = { |
| .name = "usbhid", |
| .probe = usbhid_probe, |
| .disconnect = usbhid_disconnect, |
| #ifdef CONFIG_PM |
| .suspend = hid_suspend, |
| .resume = hid_resume, |
| .reset_resume = hid_reset_resume, |
| #endif |
| .pre_reset = hid_pre_reset, |
| .post_reset = hid_post_reset, |
| .id_table = hid_usb_ids, |
| .supports_autosuspend = 1, |
| }; |
| |
| struct usb_interface *usbhid_find_interface(int minor) |
| { |
| return usb_find_interface(&hid_driver, minor); |
| } |
| |
| static int __init hid_init(void) |
| { |
| int retval; |
| |
| retval = hid_quirks_init(quirks_param, BUS_USB, MAX_USBHID_BOOT_QUIRKS); |
| if (retval) |
| goto usbhid_quirks_init_fail; |
| retval = usb_register(&hid_driver); |
| if (retval) |
| goto usb_register_fail; |
| pr_info(KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
| |
| return 0; |
| usb_register_fail: |
| hid_quirks_exit(BUS_USB); |
| usbhid_quirks_init_fail: |
| return retval; |
| } |
| |
| static void __exit hid_exit(void) |
| { |
| usb_deregister(&hid_driver); |
| hid_quirks_exit(BUS_USB); |
| } |
| |
| module_init(hid_init); |
| module_exit(hid_exit); |
| |
| MODULE_AUTHOR("Andreas Gal"); |
| MODULE_AUTHOR("Vojtech Pavlik"); |
| MODULE_AUTHOR("Jiri Kosina"); |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_LICENSE("GPL"); |