Resguardo inicial

linux-7.2.3/drivers/hid/usbhid/Kconfig

@@ -0,0 +1,84 @@
+# SPDX-License-Identifier: GPL-2.0-only
+menu "USB HID support"
+	depends on USB
+
+config USB_HID
+	tristate "USB HID transport layer"
+	default y
+	depends on HID
+	help
+	  Say Y here if you want to connect USB keyboards,
+	  mice, joysticks, graphic tablets, or any other HID based devices
+	  to your computer via USB, as well as Uninterruptible Power Supply
+	  (UPS) and monitor control devices.
+
+	  You can't use this driver and the HIDBP (Boot Protocol) keyboard
+	  and mouse drivers at the same time. More information is available:
+	  <file:Documentation/input/input.rst>.
+
+	  If unsure, say Y.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called usbhid.
+
+comment "Input core support is needed for USB HID input layer or HIDBP support"
+	depends on USB_HID && INPUT=n
+
+config HID_PID
+	bool "PID device support"
+	help
+	  Say Y here if you have a PID-compliant device and wish to enable force
+	  feedback for it. Microsoft Sidewinder Force Feedback 2 is one of such
+	  devices.
+
+config USB_HIDDEV
+	bool "/dev/hiddev raw HID device support"
+	depends on USB_HID
+	help
+	  Say Y here if you want to support HID devices (from the USB
+	  specification standpoint) that aren't strictly user interface
+	  devices, like monitor controls and Uninterruptible Power Supplies.
+
+	  This module supports these devices separately using a separate
+	  event interface on /dev/usb/hiddevX (char 180:96 to 180:111).
+
+	  If unsure, say Y.
+
+menu "USB HID Boot Protocol drivers"
+	depends on USB!=n && USB_HID!=y && EXPERT
+
+config USB_KBD
+	tristate "USB HIDBP Keyboard (simple Boot) support"
+	depends on USB && INPUT
+	help
+	  Say Y here only if you are absolutely sure that you don't want
+	  to use the generic HID driver for your USB keyboard and prefer
+	  to use the keyboard in its limited Boot Protocol mode instead.
+
+	  This is almost certainly not what you want.  This is mostly
+	  useful for embedded applications or simple keyboards.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called usbkbd.
+
+	  If even remotely unsure, say N.
+
+config USB_MOUSE
+	tristate "USB HIDBP Mouse (simple Boot) support"
+	depends on USB && INPUT
+	help
+	  Say Y here only if you are absolutely sure that you don't want
+	  to use the generic HID driver for your USB mouse and prefer
+	  to use the mouse in its limited Boot Protocol mode instead.
+
+	  This is almost certainly not what you want.  This is mostly
+	  useful for embedded applications or simple mice.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called usbmouse.
+
+	  If even remotely unsure, say N.
+
+endmenu
+
+endmenu

linux-7.2.3/drivers/hid/usbhid/Makefile

@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the USB input drivers
+#
+
+usbhid-y	:= hid-core.o
+usbhid-$(CONFIG_USB_HIDDEV)	+= hiddev.o
+usbhid-$(CONFIG_HID_PID)	+= hid-pidff.o
+
+obj-$(CONFIG_USB_HID)		+= usbhid.o
+obj-$(CONFIG_USB_KBD)		+= usbkbd.o
+obj-$(CONFIG_USB_MOUSE)		+= usbmouse.o
+

linux-7.2.3/drivers/hid/usbhid/hid-pidff.h

@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef __HID_PIDFF_H
+#define __HID_PIDFF_H
+
+#include <linux/hid.h>
+
+/* HID PIDFF quirks */
+
+/* Delay field (0xA7) missing. Skip it during set effect report upload */
+#define HID_PIDFF_QUIRK_MISSING_DELAY		BIT(0)
+
+/* Missing Paramter block offset (0x23). Skip it during SET_CONDITION upload */
+#define HID_PIDFF_QUIRK_MISSING_PBO		BIT(1)
+
+/* Initialise device control field even if logical_minimum != 1 */
+#define HID_PIDFF_QUIRK_PERMISSIVE_CONTROL	BIT(2)
+
+/* Use fixed 0x4000 direction during SET_EFFECT report upload */
+#define HID_PIDFF_QUIRK_FIX_CONDITIONAL_DIRECTION	BIT(3)
+
+/* Force all periodic effects to be uploaded as SINE */
+#define HID_PIDFF_QUIRK_PERIODIC_SINE_ONLY	BIT(4)
+
+/* Allow devices with missing negative coefficient in the set condition usage */
+#define HID_PIDFF_QUIRK_MISSING_NEG_COEFFICIENT	BIT(5)
+
+/* Allow devices with missing negative saturation in the set condition usage */
+#define HID_PIDFF_QUIRK_MISSING_NEG_SATURATION	BIT(6)
+
+/* Allow devices with missing deadband in the set condition usage */
+#define HID_PIDFF_QUIRK_MISSING_DEADBAND	BIT(7)
+
+#ifdef CONFIG_HID_PID
+int hid_pidff_init(struct hid_device *hid);
+int hid_pidff_init_with_quirks(struct hid_device *hid, u32 initial_quirks);
+#else
+#define hid_pidff_init NULL
+#define hid_pidff_init_with_quirks NULL
+#endif
+
+#endif

linux-7.2.3/drivers/hid/usbhid/hiddev.c

@@ -0,0 +1,945 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 2001 Paul Stewart
+ *  Copyright (c) 2001 Vojtech Pavlik
+ *
+ *  HID char devices, giving access to raw HID device events.
+ */
+
+/*
+ *
+ * Should you need to contact me, the author, you can do so either by
+ * e-mail - mail your message to Paul Stewart <stewart@wetlogic.net>
+ */
+
+#include <linux/poll.h>
+#include <linux/slab.h>
+#include <linux/sched/signal.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/usb.h>
+#include <linux/hid.h>
+#include <linux/hiddev.h>
+#include <linux/compat.h>
+#include <linux/vmalloc.h>
+#include <linux/nospec.h>
+#include "usbhid.h"
+
+#ifdef CONFIG_USB_DYNAMIC_MINORS
+#define HIDDEV_MINOR_BASE	0
+#define HIDDEV_MINORS		256
+#else
+#define HIDDEV_MINOR_BASE	96
+#define HIDDEV_MINORS		16
+#endif
+#define HIDDEV_BUFFER_SIZE	2048
+
+struct hiddev_list {
+	struct hiddev_usage_ref buffer[HIDDEV_BUFFER_SIZE];
+	int head;
+	int tail;
+	unsigned flags;
+	struct fasync_struct *fasync;
+	struct hiddev *hiddev;
+	struct list_head node;
+	struct mutex thread_lock;
+};
+
+/*
+ * Find a report, given the report's type and ID.  The ID can be specified
+ * indirectly by REPORT_ID_FIRST (which returns the first report of the given
+ * type) or by (REPORT_ID_NEXT | old_id), which returns the next report of the
+ * given type which follows old_id.
+ */
+static struct hid_report *
+hiddev_lookup_report(struct hid_device *hid, struct hiddev_report_info *rinfo)
+{
+	unsigned int flags = rinfo->report_id & ~HID_REPORT_ID_MASK;
+	unsigned int rid = rinfo->report_id & HID_REPORT_ID_MASK;
+	struct hid_report_enum *report_enum;
+	struct hid_report *report;
+	struct list_head *list;
+
+	if (rinfo->report_type < HID_REPORT_TYPE_MIN ||
+	    rinfo->report_type > HID_REPORT_TYPE_MAX)
+		return NULL;
+
+	report_enum = hid->report_enum +
+		(rinfo->report_type - HID_REPORT_TYPE_MIN);
+
+	switch (flags) {
+	case 0: /* Nothing to do -- report_id is already set correctly */
+		break;
+
+	case HID_REPORT_ID_FIRST:
+		if (list_empty(&report_enum->report_list))
+			return NULL;
+
+		list = report_enum->report_list.next;
+		report = list_entry(list, struct hid_report, list);
+		rinfo->report_id = report->id;
+		break;
+
+	case HID_REPORT_ID_NEXT:
+		report = report_enum->report_id_hash[rid];
+		if (!report)
+			return NULL;
+
+		list = report->list.next;
+		if (list == &report_enum->report_list)
+			return NULL;
+
+		report = list_entry(list, struct hid_report, list);
+		rinfo->report_id = report->id;
+		break;
+
+	default:
+		return NULL;
+	}
+
+	return report_enum->report_id_hash[rinfo->report_id];
+}
+
+/*
+ * Perform an exhaustive search of the report table for a usage, given its
+ * type and usage id.
+ */
+static struct hid_field *
+hiddev_lookup_usage(struct hid_device *hid, struct hiddev_usage_ref *uref)
+{
+	int i, j;
+	struct hid_report *report;
+	struct hid_report_enum *report_enum;
+	struct hid_field *field;
+
+	if (uref->report_type < HID_REPORT_TYPE_MIN ||
+	    uref->report_type > HID_REPORT_TYPE_MAX)
+		return NULL;
+
+	report_enum = hid->report_enum +
+		(uref->report_type - HID_REPORT_TYPE_MIN);
+
+	list_for_each_entry(report, &report_enum->report_list, list) {
+		for (i = 0; i < report->maxfield; i++) {
+			field = report->field[i];
+			for (j = 0; j < field->maxusage; j++) {
+				if (field->usage[j].hid == uref->usage_code) {
+					uref->report_id = report->id;
+					uref->field_index = i;
+					uref->usage_index = j;
+					return field;
+				}
+			}
+		}
+	}
+
+	return NULL;
+}
+
+static void hiddev_send_event(struct hid_device *hid,
+			      struct hiddev_usage_ref *uref)
+{
+	struct hiddev *hiddev = hid->hiddev;
+	struct hiddev_list *list;
+	unsigned long flags;
+
+	spin_lock_irqsave(&hiddev->list_lock, flags);
+	list_for_each_entry(list, &hiddev->list, node) {
+		if (uref->field_index != HID_FIELD_INDEX_NONE ||
+		    (list->flags & HIDDEV_FLAG_REPORT) != 0) {
+			list->buffer[list->head] = *uref;
+			list->head = (list->head + 1) &
+				(HIDDEV_BUFFER_SIZE - 1);
+			kill_fasync(&list->fasync, SIGIO, POLL_IN);
+		}
+	}
+	spin_unlock_irqrestore(&hiddev->list_lock, flags);
+
+	wake_up_interruptible(&hiddev->wait);
+}
+
+/*
+ * This is where hid.c calls into hiddev to pass an event that occurred over
+ * the interrupt pipe
+ */
+void hiddev_hid_event(struct hid_device *hid, struct hid_field *field,
+		      struct hid_usage *usage, __s32 value)
+{
+	unsigned type = field->report_type;
+	struct hiddev_usage_ref uref;
+
+	uref.report_type =
+	  (type == HID_INPUT_REPORT) ? HID_REPORT_TYPE_INPUT :
+	  ((type == HID_OUTPUT_REPORT) ? HID_REPORT_TYPE_OUTPUT :
+	   ((type == HID_FEATURE_REPORT) ? HID_REPORT_TYPE_FEATURE : 0));
+	uref.report_id = field->report->id;
+	uref.field_index = field->index;
+	uref.usage_index = (usage - field->usage);
+	uref.usage_code = usage->hid;
+	uref.value = value;
+
+	hiddev_send_event(hid, &uref);
+}
+EXPORT_SYMBOL_GPL(hiddev_hid_event);
+
+void hiddev_report_event(struct hid_device *hid, struct hid_report *report)
+{
+	unsigned type = report->type;
+	struct hiddev_usage_ref uref;
+
+	memset(&uref, 0, sizeof(uref));
+	uref.report_type =
+	  (type == HID_INPUT_REPORT) ? HID_REPORT_TYPE_INPUT :
+	  ((type == HID_OUTPUT_REPORT) ? HID_REPORT_TYPE_OUTPUT :
+	   ((type == HID_FEATURE_REPORT) ? HID_REPORT_TYPE_FEATURE : 0));
+	uref.report_id = report->id;
+	uref.field_index = HID_FIELD_INDEX_NONE;
+
+	hiddev_send_event(hid, &uref);
+}
+
+/*
+ * fasync file op
+ */
+static int hiddev_fasync(int fd, struct file *file, int on)
+{
+	struct hiddev_list *list = file->private_data;
+
+	return fasync_helper(fd, file, on, &list->fasync);
+}
+
+
+/*
+ * release file op
+ */
+static int hiddev_release(struct inode * inode, struct file * file)
+{
+	struct hiddev_list *list = file->private_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&list->hiddev->list_lock, flags);
+	list_del(&list->node);
+	spin_unlock_irqrestore(&list->hiddev->list_lock, flags);
+
+	mutex_lock(&list->hiddev->existancelock);
+	if (!--list->hiddev->open) {
+		if (list->hiddev->exist) {
+			hid_hw_close(list->hiddev->hid);
+			hid_hw_power(list->hiddev->hid, PM_HINT_NORMAL);
+		} else {
+			mutex_unlock(&list->hiddev->existancelock);
+			kfree(list->hiddev);
+			vfree(list);
+			return 0;
+		}
+	}
+
+	mutex_unlock(&list->hiddev->existancelock);
+	vfree(list);
+
+	return 0;
+}
+
+static int __hiddev_open(struct hiddev *hiddev, struct file *file)
+{
+	struct hiddev_list *list;
+	int error;
+
+	lockdep_assert_held(&hiddev->existancelock);
+
+	list = vzalloc(sizeof(*list));
+	if (!list)
+		return -ENOMEM;
+
+	mutex_init(&list->thread_lock);
+	list->hiddev = hiddev;
+
+	if (!hiddev->open++) {
+		error = hid_hw_power(hiddev->hid, PM_HINT_FULLON);
+		if (error < 0)
+			goto err_drop_count;
+
+		error = hid_hw_open(hiddev->hid);
+		if (error < 0)
+			goto err_normal_power;
+	}
+
+	spin_lock_irq(&hiddev->list_lock);
+	list_add_tail(&list->node, &hiddev->list);
+	spin_unlock_irq(&hiddev->list_lock);
+
+	file->private_data = list;
+
+	return 0;
+
+err_normal_power:
+	hid_hw_power(hiddev->hid, PM_HINT_NORMAL);
+err_drop_count:
+	hiddev->open--;
+	vfree(list);
+	return error;
+}
+
+/*
+ * open file op
+ */
+static int hiddev_open(struct inode *inode, struct file *file)
+{
+	struct usb_interface *intf;
+	struct hid_device *hid;
+	struct hiddev *hiddev;
+	int res;
+
+	intf = usbhid_find_interface(iminor(inode));
+	if (!intf)
+		return -ENODEV;
+
+	hid = usb_get_intfdata(intf);
+	hiddev = hid->hiddev;
+
+	mutex_lock(&hiddev->existancelock);
+	res = hiddev->exist ? __hiddev_open(hiddev, file) : -ENODEV;
+	mutex_unlock(&hiddev->existancelock);
+
+	return res;
+}
+
+/*
+ * "write" file op
+ */
+static ssize_t hiddev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
+{
+	return -EINVAL;
+}
+
+/*
+ * "read" file op
+ */
+static ssize_t hiddev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
+{
+	DEFINE_WAIT(wait);
+	struct hiddev_list *list = file->private_data;
+	int event_size;
+	int retval;
+
+	event_size = ((list->flags & HIDDEV_FLAG_UREF) != 0) ?
+		sizeof(struct hiddev_usage_ref) : sizeof(struct hiddev_event);
+
+	if (count < event_size)
+		return 0;
+
+	/* lock against other threads */
+	retval = mutex_lock_interruptible(&list->thread_lock);
+	if (retval)
+		return -ERESTARTSYS;
+
+	while (retval == 0) {
+		if (list->head == list->tail) {
+			prepare_to_wait(&list->hiddev->wait, &wait, TASK_INTERRUPTIBLE);
+
+			while (list->head == list->tail) {
+				if (signal_pending(current)) {
+					retval = -ERESTARTSYS;
+					break;
+				}
+				if (!list->hiddev->exist) {
+					retval = -EIO;
+					break;
+				}
+				if (file->f_flags & O_NONBLOCK) {
+					retval = -EAGAIN;
+					break;
+				}
+
+				/* let O_NONBLOCK tasks run */
+				mutex_unlock(&list->thread_lock);
+				schedule();
+				if (mutex_lock_interruptible(&list->thread_lock)) {
+					finish_wait(&list->hiddev->wait, &wait);
+					return -EINTR;
+				}
+				set_current_state(TASK_INTERRUPTIBLE);
+			}
+			finish_wait(&list->hiddev->wait, &wait);
+
+		}
+
+		if (retval) {
+			mutex_unlock(&list->thread_lock);
+			return retval;
+		}
+
+
+		while (list->head != list->tail &&
+		       retval + event_size <= count) {
+			if ((list->flags & HIDDEV_FLAG_UREF) == 0) {
+				if (list->buffer[list->tail].field_index != HID_FIELD_INDEX_NONE) {
+					struct hiddev_event event;
+
+					event.hid = list->buffer[list->tail].usage_code;
+					event.value = list->buffer[list->tail].value;
+					if (copy_to_user(buffer + retval, &event, sizeof(struct hiddev_event))) {
+						mutex_unlock(&list->thread_lock);
+						return -EFAULT;
+					}
+					retval += sizeof(struct hiddev_event);
+				}
+			} else {
+				if (list->buffer[list->tail].field_index != HID_FIELD_INDEX_NONE ||
+				    (list->flags & HIDDEV_FLAG_REPORT) != 0) {
+
+					if (copy_to_user(buffer + retval, list->buffer + list->tail, sizeof(struct hiddev_usage_ref))) {
+						mutex_unlock(&list->thread_lock);
+						return -EFAULT;
+					}
+					retval += sizeof(struct hiddev_usage_ref);
+				}
+			}
+			list->tail = (list->tail + 1) & (HIDDEV_BUFFER_SIZE - 1);
+		}
+
+	}
+	mutex_unlock(&list->thread_lock);
+
+	return retval;
+}
+
+/*
+ * "poll" file op
+ * No kernel lock - fine
+ */
+static __poll_t hiddev_poll(struct file *file, poll_table *wait)
+{
+	struct hiddev_list *list = file->private_data;
+
+	poll_wait(file, &list->hiddev->wait, wait);
+	if (list->head != list->tail)
+		return EPOLLIN | EPOLLRDNORM | EPOLLOUT;
+	if (!list->hiddev->exist)
+		return EPOLLERR | EPOLLHUP;
+	return 0;
+}
+
+/*
+ * "ioctl" file op
+ */
+static noinline int hiddev_ioctl_usage(struct hiddev *hiddev, unsigned int cmd, void __user *user_arg)
+{
+	struct hid_device *hid = hiddev->hid;
+	struct hiddev_report_info rinfo;
+	struct hiddev_usage_ref_multi *uref_multi = NULL;
+	struct hiddev_usage_ref *uref;
+	struct hid_report *report;
+	struct hid_field *field;
+	int i;
+
+	uref_multi = kmalloc_obj(struct hiddev_usage_ref_multi);
+	if (!uref_multi)
+		return -ENOMEM;
+	uref = &uref_multi->uref;
+	if (cmd == HIDIOCGUSAGES || cmd == HIDIOCSUSAGES) {
+		if (copy_from_user(uref_multi, user_arg,
+				   sizeof(*uref_multi)))
+			goto fault;
+	} else {
+		if (copy_from_user(uref, user_arg, sizeof(*uref)))
+			goto fault;
+	}
+
+	switch (cmd) {
+	case HIDIOCGUCODE:
+		rinfo.report_type = uref->report_type;
+		rinfo.report_id = uref->report_id;
+		if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
+			goto inval;
+
+		if (uref->field_index >= report->maxfield)
+			goto inval;
+		uref->field_index = array_index_nospec(uref->field_index,
+						       report->maxfield);
+
+		field = report->field[uref->field_index];
+		if (uref->usage_index >= field->maxusage)
+			goto inval;
+		uref->usage_index = array_index_nospec(uref->usage_index,
+						       field->maxusage);
+
+		uref->usage_code = field->usage[uref->usage_index].hid;
+
+		if (copy_to_user(user_arg, uref, sizeof(*uref)))
+			goto fault;
+
+		goto goodreturn;
+
+	default:
+		if (cmd != HIDIOCGUSAGE &&
+		    cmd != HIDIOCGUSAGES &&
+		    uref->report_type == HID_REPORT_TYPE_INPUT)
+			goto inval;
+
+		if (uref->report_id == HID_REPORT_ID_UNKNOWN) {
+			field = hiddev_lookup_usage(hid, uref);
+			if (field == NULL)
+				goto inval;
+		} else {
+			rinfo.report_type = uref->report_type;
+			rinfo.report_id = uref->report_id;
+			if ((report = hiddev_lookup_report(hid, &rinfo)) == NULL)
+				goto inval;
+
+			if (uref->field_index >= report->maxfield)
+				goto inval;
+			uref->field_index = array_index_nospec(uref->field_index,
+							       report->maxfield);
+
+			field = report->field[uref->field_index];
+
+			if (cmd == HIDIOCGCOLLECTIONINDEX) {
+				if (uref->usage_index >= field->maxusage)
+					goto inval;
+				uref->usage_index =
+					array_index_nospec(uref->usage_index,
+							   field->maxusage);
+			} else if (uref->usage_index >= field->report_count)
+				goto inval;
+		}
+
+		if (cmd == HIDIOCGUSAGES || cmd == HIDIOCSUSAGES) {
+			if (uref_multi->num_values > HID_MAX_MULTI_USAGES ||
+			    uref->usage_index + uref_multi->num_values >
+			    field->report_count)
+				goto inval;
+
+			uref->usage_index =
+				array_index_nospec(uref->usage_index,
+						   field->report_count -
+						   uref_multi->num_values);
+		}
+
+		switch (cmd) {
+		case HIDIOCGUSAGE:
+			if (uref->usage_index >= field->report_count)
+				goto inval;
+			uref->value = field->value[uref->usage_index];
+			if (copy_to_user(user_arg, uref, sizeof(*uref)))
+				goto fault;
+			goto goodreturn;
+
+		case HIDIOCSUSAGE:
+			if (uref->usage_index >= field->report_count)
+				goto inval;
+			field->value[uref->usage_index] = uref->value;
+			goto goodreturn;
+
+		case HIDIOCGCOLLECTIONINDEX:
+			i = field->usage[uref->usage_index].collection_index;
+			kfree(uref_multi);
+			return i;
+		case HIDIOCGUSAGES:
+			for (i = 0; i < uref_multi->num_values; i++)
+				uref_multi->values[i] =
+				    field->value[uref->usage_index + i];
+			if (copy_to_user(user_arg, uref_multi,
+					 sizeof(*uref_multi)))
+				goto fault;
+			goto goodreturn;
+		case HIDIOCSUSAGES:
+			for (i = 0; i < uref_multi->num_values; i++)
+				field->value[uref->usage_index + i] =
+				    uref_multi->values[i];
+			goto goodreturn;
+		}
+
+goodreturn:
+		kfree(uref_multi);
+		return 0;
+fault:
+		kfree(uref_multi);
+		return -EFAULT;
+inval:
+		kfree(uref_multi);
+		return -EINVAL;
+	}
+}
+
+static noinline int hiddev_ioctl_string(struct hiddev *hiddev, unsigned int cmd, void __user *user_arg)
+{
+	struct hid_device *hid = hiddev->hid;
+	struct usb_device *dev = hid_to_usb_dev(hid);
+	int idx, len;
+	char *buf;
+
+	if (get_user(idx, (int __user *)user_arg))
+		return -EFAULT;
+
+	if ((buf = kmalloc(HID_STRING_SIZE, GFP_KERNEL)) == NULL)
+		return -ENOMEM;
+
+	if ((len = usb_string(dev, idx, buf, HID_STRING_SIZE-1)) < 0) {
+		kfree(buf);
+		return -EINVAL;
+	}
+
+	if (copy_to_user(user_arg+sizeof(int), buf, len+1)) {
+		kfree(buf);
+		return -EFAULT;
+	}
+
+	kfree(buf);
+
+	return len;
+}
+
+static long hiddev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	struct hiddev_list *list = file->private_data;
+	struct hiddev *hiddev = list->hiddev;
+	struct hid_device *hid;
+	struct hiddev_collection_info cinfo;
+	struct hiddev_report_info rinfo;
+	struct hiddev_field_info finfo;
+	struct hiddev_devinfo dinfo;
+	struct hid_report *report;
+	struct hid_field *field;
+	void __user *user_arg = (void __user *)arg;
+	int i, r = -EINVAL;
+
+	/* Called without BKL by compat methods so no BKL taken */
+
+	mutex_lock(&hiddev->existancelock);
+	if (!hiddev->exist) {
+		r = -ENODEV;
+		goto ret_unlock;
+	}
+
+	hid = hiddev->hid;
+
+	switch (cmd) {
+
+	case HIDIOCGVERSION:
+		r = put_user(HID_VERSION, (int __user *)arg) ?
+			-EFAULT : 0;
+		break;
+
+	case HIDIOCAPPLICATION:
+		if (arg >= hid->maxapplication)
+			break;
+
+		for (i = 0; i < hid->maxcollection; i++)
+			if (hid->collection[i].type ==
+			    HID_COLLECTION_APPLICATION && arg-- == 0)
+				break;
+
+		if (i < hid->maxcollection)
+			r = hid->collection[i].usage;
+		break;
+
+	case HIDIOCGDEVINFO:
+		{
+			struct usb_device *dev = hid_to_usb_dev(hid);
+			struct usbhid_device *usbhid = hid->driver_data;
+
+			memset(&dinfo, 0, sizeof(dinfo));
+
+			dinfo.bustype = BUS_USB;
+			dinfo.busnum = dev->bus->busnum;
+			dinfo.devnum = dev->devnum;
+			dinfo.ifnum = usbhid->ifnum;
+			dinfo.vendor = le16_to_cpu(dev->descriptor.idVendor);
+			dinfo.product = le16_to_cpu(dev->descriptor.idProduct);
+			dinfo.version = le16_to_cpu(dev->descriptor.bcdDevice);
+			dinfo.num_applications = hid->maxapplication;
+
+			r = copy_to_user(user_arg, &dinfo, sizeof(dinfo)) ?
+				-EFAULT : 0;
+			break;
+		}
+
+	case HIDIOCGFLAG:
+		r = put_user(list->flags, (int __user *)arg) ?
+			-EFAULT : 0;
+		break;
+
+	case HIDIOCSFLAG:
+		{
+			int newflags;
+
+			if (get_user(newflags, (int __user *)arg)) {
+				r = -EFAULT;
+				break;
+			}
+
+			if ((newflags & ~HIDDEV_FLAGS) != 0 ||
+			    ((newflags & HIDDEV_FLAG_REPORT) != 0 &&
+			     (newflags & HIDDEV_FLAG_UREF) == 0))
+				break;
+
+			list->flags = newflags;
+
+			r = 0;
+			break;
+		}
+
+	case HIDIOCGSTRING:
+		r = hiddev_ioctl_string(hiddev, cmd, user_arg);
+		break;
+
+	case HIDIOCINITREPORT:
+		usbhid_init_reports(hid);
+		hiddev->initialized = true;
+		r = 0;
+		break;
+
+	case HIDIOCGREPORT:
+		if (copy_from_user(&rinfo, user_arg, sizeof(rinfo))) {
+			r = -EFAULT;
+			break;
+		}
+
+		if (rinfo.report_type == HID_REPORT_TYPE_OUTPUT)
+			break;
+
+		report = hiddev_lookup_report(hid, &rinfo);
+		if (report == NULL)
+			break;
+
+		hid_hw_request(hid, report, HID_REQ_GET_REPORT);
+		hid_hw_wait(hid);
+
+		r = 0;
+		break;
+
+	case HIDIOCSREPORT:
+		if (copy_from_user(&rinfo, user_arg, sizeof(rinfo))) {
+			r = -EFAULT;
+			break;
+		}
+
+		if (rinfo.report_type == HID_REPORT_TYPE_INPUT)
+			break;
+
+		report = hiddev_lookup_report(hid, &rinfo);
+		if (report == NULL)
+			break;
+
+		hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+		hid_hw_wait(hid);
+
+		r = 0;
+		break;
+
+	case HIDIOCGREPORTINFO:
+		if (copy_from_user(&rinfo, user_arg, sizeof(rinfo))) {
+			r = -EFAULT;
+			break;
+		}
+
+		report = hiddev_lookup_report(hid, &rinfo);
+		if (report == NULL)
+			break;
+
+		rinfo.num_fields = report->maxfield;
+
+		r = copy_to_user(user_arg, &rinfo, sizeof(rinfo)) ?
+			-EFAULT : 0;
+		break;
+
+	case HIDIOCGFIELDINFO:
+		if (copy_from_user(&finfo, user_arg, sizeof(finfo))) {
+			r = -EFAULT;
+			break;
+		}
+
+		rinfo.report_type = finfo.report_type;
+		rinfo.report_id = finfo.report_id;
+
+		report = hiddev_lookup_report(hid, &rinfo);
+		if (report == NULL)
+			break;
+
+		if (finfo.field_index >= report->maxfield)
+			break;
+		finfo.field_index = array_index_nospec(finfo.field_index,
+						       report->maxfield);
+
+		field = report->field[finfo.field_index];
+		memset(&finfo, 0, sizeof(finfo));
+		finfo.report_type = rinfo.report_type;
+		finfo.report_id = rinfo.report_id;
+		finfo.field_index = field->report_count - 1;
+		finfo.maxusage = field->maxusage;
+		finfo.flags = field->flags;
+		finfo.physical = field->physical;
+		finfo.logical = field->logical;
+		finfo.application = field->application;
+		finfo.logical_minimum = field->logical_minimum;
+		finfo.logical_maximum = field->logical_maximum;
+		finfo.physical_minimum = field->physical_minimum;
+		finfo.physical_maximum = field->physical_maximum;
+		finfo.unit_exponent = field->unit_exponent;
+		finfo.unit = field->unit;
+
+		r = copy_to_user(user_arg, &finfo, sizeof(finfo)) ?
+			-EFAULT : 0;
+		break;
+
+	case HIDIOCGUCODE:
+	case HIDIOCGUSAGE:
+	case HIDIOCSUSAGE:
+	case HIDIOCGUSAGES:
+	case HIDIOCSUSAGES:
+	case HIDIOCGCOLLECTIONINDEX:
+		if (!hiddev->initialized) {
+			usbhid_init_reports(hid);
+			hiddev->initialized = true;
+		}
+		r = hiddev_ioctl_usage(hiddev, cmd, user_arg);
+		break;
+
+	case HIDIOCGCOLLECTIONINFO:
+		if (copy_from_user(&cinfo, user_arg, sizeof(cinfo))) {
+			r = -EFAULT;
+			break;
+		}
+
+		if (cinfo.index >= hid->maxcollection)
+			break;
+		cinfo.index = array_index_nospec(cinfo.index,
+						 hid->maxcollection);
+
+		cinfo.type = hid->collection[cinfo.index].type;
+		cinfo.usage = hid->collection[cinfo.index].usage;
+		cinfo.level = hid->collection[cinfo.index].level;
+
+		r = copy_to_user(user_arg, &cinfo, sizeof(cinfo)) ?
+			-EFAULT : 0;
+		break;
+
+	default:
+		if (_IOC_TYPE(cmd) != 'H' || _IOC_DIR(cmd) != _IOC_READ)
+			break;
+
+		if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGNAME(0))) {
+			int len = strlen(hid->name) + 1;
+			if (len > _IOC_SIZE(cmd))
+				 len = _IOC_SIZE(cmd);
+			r = copy_to_user(user_arg, hid->name, len) ?
+				-EFAULT : len;
+			break;
+		}
+
+		if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGPHYS(0))) {
+			int len = strlen(hid->phys) + 1;
+			if (len > _IOC_SIZE(cmd))
+				len = _IOC_SIZE(cmd);
+			r = copy_to_user(user_arg, hid->phys, len) ?
+				-EFAULT : len;
+			break;
+		}
+	}
+
+ret_unlock:
+	mutex_unlock(&hiddev->existancelock);
+	return r;
+}
+
+static const struct file_operations hiddev_fops = {
+	.owner =	THIS_MODULE,
+	.read =		hiddev_read,
+	.write =	hiddev_write,
+	.poll =		hiddev_poll,
+	.open =		hiddev_open,
+	.release =	hiddev_release,
+	.unlocked_ioctl =	hiddev_ioctl,
+	.fasync =	hiddev_fasync,
+	.compat_ioctl	= compat_ptr_ioctl,
+	.llseek		= noop_llseek,
+};
+
+static char *hiddev_devnode(const struct device *dev, umode_t *mode)
+{
+	return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev));
+}
+
+static struct usb_class_driver hiddev_class = {
+	.name =		"hiddev%d",
+	.devnode =	hiddev_devnode,
+	.fops =		&hiddev_fops,
+	.minor_base =	HIDDEV_MINOR_BASE,
+};
+
+/*
+ * This is where hid.c calls us to connect a hid device to the hiddev driver
+ */
+int hiddev_connect(struct hid_device *hid, unsigned int force)
+{
+	struct hiddev *hiddev;
+	struct usbhid_device *usbhid = hid->driver_data;
+	int retval;
+
+	if (!force) {
+		unsigned int i;
+		for (i = 0; i < hid->maxcollection; i++)
+			if (hid->collection[i].type ==
+			    HID_COLLECTION_APPLICATION &&
+			    !IS_INPUT_APPLICATION(hid->collection[i].usage))
+				break;
+
+		if (i == hid->maxcollection)
+			return -EINVAL;
+	}
+
+	if (!(hiddev = kzalloc_obj(struct hiddev)))
+		return -ENOMEM;
+
+	init_waitqueue_head(&hiddev->wait);
+	INIT_LIST_HEAD(&hiddev->list);
+	spin_lock_init(&hiddev->list_lock);
+	mutex_init(&hiddev->existancelock);
+	hid->hiddev = hiddev;
+	hiddev->hid = hid;
+	hiddev->exist = 1;
+	retval = usb_register_dev(usbhid->intf, &hiddev_class);
+	if (retval) {
+		hid_err(hid, "Not able to get a minor for this device\n");
+		hid->hiddev = NULL;
+		kfree(hiddev);
+		return retval;
+	}
+
+	/*
+	 * If HID_QUIRK_NO_INIT_REPORTS is set, make sure we don't initialize
+	 * the reports.
+	 */
+	hiddev->initialized = hid->quirks & HID_QUIRK_NO_INIT_REPORTS;
+
+	hiddev->minor = usbhid->intf->minor;
+
+	return 0;
+}
+
+/*
+ * This is where hid.c calls us to disconnect a hiddev device from the
+ * corresponding hid device (usually because the usb device has disconnected)
+ */
+static struct usb_class_driver hiddev_class;
+void hiddev_disconnect(struct hid_device *hid)
+{
+	struct hiddev *hiddev = hid->hiddev;
+	struct usbhid_device *usbhid = hid->driver_data;
+
+	usb_deregister_dev(usbhid->intf, &hiddev_class);
+
+	mutex_lock(&hiddev->existancelock);
+	hiddev->exist = 0;
+
+	if (hiddev->open) {
+		hid_hw_close(hiddev->hid);
+		wake_up_interruptible(&hiddev->wait);
+		mutex_unlock(&hiddev->existancelock);
+	} else {
+		mutex_unlock(&hiddev->existancelock);
+		kfree(hiddev);
+	}
+}

linux-7.2.3/drivers/hid/usbhid/usbhid.h

@@ -0,0 +1,97 @@
+/* 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 */
+
+	struct mutex mutex;						/* start/stop/open/close */
+	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
+

linux-7.2.3/drivers/hid/usbhid/usbkbd.c

@@ -0,0 +1,403 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 1999-2001 Vojtech Pavlik
+ *
+ *  USB HIDBP Keyboard support
+ */
+
+/*
+ *
+ * Should you need to contact me, the author, you can do so either by
+ * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
+ * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/usb/input.h>
+#include <linux/hid.h>
+#include <linux/seq_buf.h>
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION ""
+#define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"
+#define DRIVER_DESC "USB HID Boot Protocol keyboard driver"
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+static const unsigned char usb_kbd_keycode[256] = {
+	  0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
+	 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
+	  4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
+	 27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
+	 65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
+	105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
+	 72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
+	191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
+	115,114,  0,  0,  0,121,  0, 89, 93,124, 92, 94, 95,  0,  0,  0,
+	122,123, 90, 91, 85,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+	 29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
+	150,158,159,128,136,177,178,176,142,152,173,140
+};
+
+
+/**
+ * struct usb_kbd - state of each attached keyboard
+ * @dev:	input device associated with this keyboard
+ * @usbdev:	usb device associated with this keyboard
+ * @old:	data received in the past from the @irq URB representing which
+ *		keys were pressed. By comparing with the current list of keys
+ *		that are pressed, we are able to see key releases.
+ * @irq:	URB for receiving a list of keys that are pressed when a
+ *		new key is pressed or a key that was pressed is released.
+ * @led:	URB for sending LEDs (e.g. numlock, ...)
+ * @newleds:	data that will be sent with the @led URB representing which LEDs
+ *		should be on
+ * @name:	Name of the keyboard. @dev's name field points to this buffer
+ * @phys:	Physical path of the keyboard. @dev's phys field points to this
+ *		buffer
+ * @new:	Buffer for the @irq URB
+ * @cr:		Control request for @led URB
+ * @leds:	Buffer for the @led URB
+ * @new_dma:	DMA address for @irq URB
+ * @leds_dma:	DMA address for @led URB
+ * @leds_lock:	spinlock that protects @leds, @newleds, and @led_urb_submitted
+ * @led_urb_submitted: indicates whether @led is in progress, i.e. it has been
+ *		submitted and its completion handler has not returned yet
+ *		without	resubmitting @led
+ */
+struct usb_kbd {
+	struct input_dev *dev;
+	struct usb_device *usbdev;
+	unsigned char old[8];
+	struct urb *irq, *led;
+	unsigned char newleds;
+	char name[128];
+	char phys[64];
+
+	unsigned char *new;
+	struct usb_ctrlrequest *cr;
+	unsigned char *leds;
+	dma_addr_t new_dma;
+	dma_addr_t leds_dma;
+
+	spinlock_t leds_lock;
+	bool led_urb_submitted;
+
+};
+
+static void usb_kbd_irq(struct urb *urb)
+{
+	struct usb_kbd *kbd = urb->context;
+	int i;
+
+	switch (urb->status) {
+	case 0:			/* success */
+		break;
+	case -ECONNRESET:	/* unlink */
+	case -ENOENT:
+	case -ESHUTDOWN:
+		return;
+	/* -EPIPE:  should clear the halt */
+	default:		/* error */
+		goto resubmit;
+	}
+
+	for (i = 0; i < 8; i++)
+		input_report_key(kbd->dev, usb_kbd_keycode[i + 224], (kbd->new[0] >> i) & 1);
+
+	for (i = 2; i < 8; i++) {
+
+		if (kbd->old[i] > 3 && memscan(kbd->new + 2, kbd->old[i], 6) == kbd->new + 8) {
+			if (usb_kbd_keycode[kbd->old[i]])
+				input_report_key(kbd->dev, usb_kbd_keycode[kbd->old[i]], 0);
+			else
+				hid_info(urb->dev,
+					 "Unknown key (scancode %#x) released.\n",
+					 kbd->old[i]);
+		}
+
+		if (kbd->new[i] > 3 && memscan(kbd->old + 2, kbd->new[i], 6) == kbd->old + 8) {
+			if (usb_kbd_keycode[kbd->new[i]])
+				input_report_key(kbd->dev, usb_kbd_keycode[kbd->new[i]], 1);
+			else
+				hid_info(urb->dev,
+					 "Unknown key (scancode %#x) pressed.\n",
+					 kbd->new[i]);
+		}
+	}
+
+	input_sync(kbd->dev);
+
+	memcpy(kbd->old, kbd->new, 8);
+
+resubmit:
+	i = usb_submit_urb (urb, GFP_ATOMIC);
+	if (i)
+		hid_err(urb->dev, "can't resubmit intr, %s-%s/input0, status %d",
+			kbd->usbdev->bus->bus_name,
+			kbd->usbdev->devpath, i);
+}
+
+static int usb_kbd_event(struct input_dev *dev, unsigned int type,
+			 unsigned int code, int value)
+{
+	unsigned long flags;
+	struct usb_kbd *kbd = input_get_drvdata(dev);
+
+	if (type != EV_LED)
+		return -1;
+
+	spin_lock_irqsave(&kbd->leds_lock, flags);
+	kbd->newleds = (!!test_bit(LED_KANA,    dev->led) << 4) | (!!test_bit(LED_COMPOSE, dev->led) << 3) |
+		       (!!test_bit(LED_SCROLLL, dev->led) << 2) | (!!test_bit(LED_CAPSL,   dev->led) << 1) |
+		       (!!test_bit(LED_NUML,    dev->led));
+
+	if (kbd->led_urb_submitted){
+		spin_unlock_irqrestore(&kbd->leds_lock, flags);
+		return 0;
+	}
+
+	if (*(kbd->leds) == kbd->newleds){
+		spin_unlock_irqrestore(&kbd->leds_lock, flags);
+		return 0;
+	}
+
+	*(kbd->leds) = kbd->newleds;
+
+	kbd->led->dev = kbd->usbdev;
+	if (usb_submit_urb(kbd->led, GFP_ATOMIC))
+		pr_err("usb_submit_urb(leds) failed\n");
+	else
+		kbd->led_urb_submitted = true;
+
+	spin_unlock_irqrestore(&kbd->leds_lock, flags);
+
+	return 0;
+}
+
+static void usb_kbd_led(struct urb *urb)
+{
+	unsigned long flags;
+	struct usb_kbd *kbd = urb->context;
+
+	if (urb->status)
+		hid_warn(urb->dev, "led urb status %d received\n",
+			 urb->status);
+
+	spin_lock_irqsave(&kbd->leds_lock, flags);
+
+	if (*(kbd->leds) == kbd->newleds){
+		kbd->led_urb_submitted = false;
+		spin_unlock_irqrestore(&kbd->leds_lock, flags);
+		return;
+	}
+
+	*(kbd->leds) = kbd->newleds;
+
+	kbd->led->dev = kbd->usbdev;
+	if (usb_submit_urb(kbd->led, GFP_ATOMIC)){
+		hid_err(urb->dev, "usb_submit_urb(leds) failed\n");
+		kbd->led_urb_submitted = false;
+	}
+	spin_unlock_irqrestore(&kbd->leds_lock, flags);
+
+}
+
+static int usb_kbd_open(struct input_dev *dev)
+{
+	struct usb_kbd *kbd = input_get_drvdata(dev);
+
+	kbd->irq->dev = kbd->usbdev;
+	if (usb_submit_urb(kbd->irq, GFP_KERNEL))
+		return -EIO;
+
+	return 0;
+}
+
+static void usb_kbd_close(struct input_dev *dev)
+{
+	struct usb_kbd *kbd = input_get_drvdata(dev);
+
+	usb_kill_urb(kbd->irq);
+}
+
+static int usb_kbd_alloc_mem(struct usb_device *dev, struct usb_kbd *kbd)
+{
+	if (!(kbd->irq = usb_alloc_urb(0, GFP_KERNEL)))
+		return -1;
+	if (!(kbd->led = usb_alloc_urb(0, GFP_KERNEL)))
+		return -1;
+	if (!(kbd->new = usb_alloc_coherent(dev, 8, GFP_KERNEL, &kbd->new_dma)))
+		return -1;
+	if (!(kbd->cr = kmalloc_obj(struct usb_ctrlrequest)))
+		return -1;
+	if (!(kbd->leds = usb_alloc_coherent(dev, 1, GFP_KERNEL, &kbd->leds_dma)))
+		return -1;
+
+	return 0;
+}
+
+static void usb_kbd_free_mem(struct usb_device *dev, struct usb_kbd *kbd)
+{
+	usb_free_urb(kbd->irq);
+	usb_free_urb(kbd->led);
+	usb_free_coherent(dev, 8, kbd->new, kbd->new_dma);
+	kfree(kbd->cr);
+	usb_free_coherent(dev, 1, kbd->leds, kbd->leds_dma);
+}
+
+static int usb_kbd_probe(struct usb_interface *iface,
+			 const struct usb_device_id *id)
+{
+	struct usb_device *dev = interface_to_usbdev(iface);
+	struct usb_host_interface *interface;
+	struct usb_endpoint_descriptor *endpoint;
+	struct usb_kbd *kbd;
+	struct input_dev *input_dev;
+	struct seq_buf kbd_name;
+	int i, pipe, maxp;
+	int error = -ENOMEM;
+	size_t len;
+
+	interface = iface->cur_altsetting;
+
+	if (interface->desc.bNumEndpoints != 1)
+		return -ENODEV;
+
+	endpoint = &interface->endpoint[0].desc;
+	if (!usb_endpoint_is_int_in(endpoint))
+		return -ENODEV;
+
+	pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
+	maxp = usb_maxpacket(dev, pipe);
+
+	kbd = kzalloc_obj(struct usb_kbd);
+	input_dev = input_allocate_device();
+	if (!kbd || !input_dev)
+		goto fail1;
+
+	if (usb_kbd_alloc_mem(dev, kbd))
+		goto fail2;
+
+	kbd->usbdev = dev;
+	kbd->dev = input_dev;
+	spin_lock_init(&kbd->leds_lock);
+	seq_buf_init(&kbd_name, kbd->name, sizeof(kbd->name));
+
+	if (dev->manufacturer)
+		seq_buf_puts(&kbd_name, dev->manufacturer);
+
+	if (dev->product) {
+		if (dev->manufacturer)
+			seq_buf_puts(&kbd_name, " ");
+		seq_buf_puts(&kbd_name, dev->product);
+	}
+
+	if (!seq_buf_used(&kbd_name))
+		snprintf(kbd->name, sizeof(kbd->name),
+			 "USB HIDBP Keyboard %04x:%04x",
+			 le16_to_cpu(dev->descriptor.idVendor),
+			 le16_to_cpu(dev->descriptor.idProduct));
+
+	usb_make_path(dev, kbd->phys, sizeof(kbd->phys));
+	len = strnlen(kbd->phys, sizeof(kbd->phys));
+	strscpy(kbd->phys + len, "/input0", sizeof(kbd->phys) - len);
+
+	input_dev->name = kbd->name;
+	input_dev->phys = kbd->phys;
+	usb_to_input_id(dev, &input_dev->id);
+	input_dev->dev.parent = &iface->dev;
+
+	input_set_drvdata(input_dev, kbd);
+
+	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_LED) |
+		BIT_MASK(EV_REP);
+	input_dev->ledbit[0] = BIT_MASK(LED_NUML) | BIT_MASK(LED_CAPSL) |
+		BIT_MASK(LED_SCROLLL) | BIT_MASK(LED_COMPOSE) |
+		BIT_MASK(LED_KANA);
+
+	for (i = 0; i < 255; i++)
+		set_bit(usb_kbd_keycode[i], input_dev->keybit);
+	clear_bit(0, input_dev->keybit);
+
+	input_dev->event = usb_kbd_event;
+	input_dev->open = usb_kbd_open;
+	input_dev->close = usb_kbd_close;
+
+	usb_fill_int_urb(kbd->irq, dev, pipe,
+			 kbd->new, (maxp > 8 ? 8 : maxp),
+			 usb_kbd_irq, kbd, endpoint->bInterval);
+	kbd->irq->transfer_dma = kbd->new_dma;
+	kbd->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+	kbd->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE;
+	kbd->cr->bRequest = 0x09;
+	kbd->cr->wValue = cpu_to_le16(0x200);
+	kbd->cr->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber);
+	kbd->cr->wLength = cpu_to_le16(1);
+
+	usb_fill_control_urb(kbd->led, dev, usb_sndctrlpipe(dev, 0),
+			     (void *) kbd->cr, kbd->leds, 1,
+			     usb_kbd_led, kbd);
+	kbd->led->transfer_dma = kbd->leds_dma;
+	kbd->led->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+	error = input_register_device(kbd->dev);
+	if (error)
+		goto fail2;
+
+	usb_set_intfdata(iface, kbd);
+	device_set_wakeup_enable(&dev->dev, 1);
+	return 0;
+
+fail2:
+	usb_kbd_free_mem(dev, kbd);
+fail1:
+	input_free_device(input_dev);
+	kfree(kbd);
+	return error;
+}
+
+static void usb_kbd_disconnect(struct usb_interface *intf)
+{
+	struct usb_kbd *kbd = usb_get_intfdata (intf);
+
+	usb_set_intfdata(intf, NULL);
+	if (kbd) {
+		usb_kill_urb(kbd->irq);
+		input_unregister_device(kbd->dev);
+		usb_kill_urb(kbd->led);
+		usb_kbd_free_mem(interface_to_usbdev(intf), kbd);
+		kfree(kbd);
+	}
+}
+
+static const struct usb_device_id usb_kbd_id_table[] = {
+	{ USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT,
+		USB_INTERFACE_PROTOCOL_KEYBOARD) },
+	{ }						/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, usb_kbd_id_table);
+
+static struct usb_driver usb_kbd_driver = {
+	.name =		"usbkbd",
+	.probe =	usb_kbd_probe,
+	.disconnect =	usb_kbd_disconnect,
+	.id_table =	usb_kbd_id_table,
+};
+
+module_usb_driver(usb_kbd_driver);

linux-7.2.3/drivers/hid/usbhid/usbmouse.c

@@ -0,0 +1,237 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 1999-2001 Vojtech Pavlik
+ *
+ *  USB HIDBP Mouse support
+ */
+
+/*
+ *
+ * Should you need to contact me, the author, you can do so either by
+ * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
+ * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/usb/input.h>
+#include <linux/hid.h>
+#include <linux/seq_buf.h>
+
+/* for apple IDs */
+#ifdef CONFIG_USB_HID_MODULE
+#include "../hid-ids.h"
+#endif
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v1.6"
+#define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"
+#define DRIVER_DESC "USB HID Boot Protocol mouse driver"
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+struct usb_mouse {
+	char name[128];
+	char phys[64];
+	struct usb_device *usbdev;
+	struct input_dev *dev;
+	struct urb *irq;
+
+	signed char *data;
+	dma_addr_t data_dma;
+};
+
+static void usb_mouse_irq(struct urb *urb)
+{
+	struct usb_mouse *mouse = urb->context;
+	signed char *data = mouse->data;
+	struct input_dev *dev = mouse->dev;
+	int status;
+
+	switch (urb->status) {
+	case 0:			/* success */
+		break;
+	case -ECONNRESET:	/* unlink */
+	case -ENOENT:
+	case -ESHUTDOWN:
+		return;
+	/* -EPIPE:  should clear the halt */
+	default:		/* error */
+		goto resubmit;
+	}
+
+	input_report_key(dev, BTN_LEFT,   data[0] & 0x01);
+	input_report_key(dev, BTN_RIGHT,  data[0] & 0x02);
+	input_report_key(dev, BTN_MIDDLE, data[0] & 0x04);
+	input_report_key(dev, BTN_SIDE,   data[0] & 0x08);
+	input_report_key(dev, BTN_EXTRA,  data[0] & 0x10);
+
+	input_report_rel(dev, REL_X,     data[1]);
+	input_report_rel(dev, REL_Y,     data[2]);
+	input_report_rel(dev, REL_WHEEL, data[3]);
+
+	input_sync(dev);
+resubmit:
+	status = usb_submit_urb (urb, GFP_ATOMIC);
+	if (status)
+		dev_err(&mouse->usbdev->dev,
+			"can't resubmit intr, %s-%s/input0, status %d\n",
+			mouse->usbdev->bus->bus_name,
+			mouse->usbdev->devpath, status);
+}
+
+static int usb_mouse_open(struct input_dev *dev)
+{
+	struct usb_mouse *mouse = input_get_drvdata(dev);
+
+	mouse->irq->dev = mouse->usbdev;
+	if (usb_submit_urb(mouse->irq, GFP_KERNEL))
+		return -EIO;
+
+	return 0;
+}
+
+static void usb_mouse_close(struct input_dev *dev)
+{
+	struct usb_mouse *mouse = input_get_drvdata(dev);
+
+	usb_kill_urb(mouse->irq);
+}
+
+static int usb_mouse_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+	struct usb_device *dev = interface_to_usbdev(intf);
+	struct usb_host_interface *interface;
+	struct usb_endpoint_descriptor *endpoint;
+	struct usb_mouse *mouse;
+	struct input_dev *input_dev;
+	struct seq_buf mouse_name;
+	int pipe, maxp;
+	int error = -ENOMEM;
+	size_t len;
+
+	interface = intf->cur_altsetting;
+
+	if (interface->desc.bNumEndpoints != 1)
+		return -ENODEV;
+
+	endpoint = &interface->endpoint[0].desc;
+	if (!usb_endpoint_is_int_in(endpoint))
+		return -ENODEV;
+
+	pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
+	maxp = usb_maxpacket(dev, pipe);
+
+	mouse = kzalloc_obj(struct usb_mouse);
+	input_dev = input_allocate_device();
+	if (!mouse || !input_dev)
+		goto fail1;
+
+	mouse->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &mouse->data_dma);
+	if (!mouse->data)
+		goto fail1;
+
+	mouse->irq = usb_alloc_urb(0, GFP_KERNEL);
+	if (!mouse->irq)
+		goto fail2;
+
+	mouse->usbdev = dev;
+	mouse->dev = input_dev;
+	seq_buf_init(&mouse_name, mouse->name, sizeof(mouse->name));
+
+	if (dev->manufacturer)
+		seq_buf_puts(&mouse_name, dev->manufacturer);
+
+	if (dev->product) {
+		if (dev->manufacturer)
+			seq_buf_puts(&mouse_name, " ");
+		seq_buf_puts(&mouse_name, dev->product);
+	}
+
+	if (!seq_buf_used(&mouse_name))
+		snprintf(mouse->name, sizeof(mouse->name),
+			 "USB HIDBP Mouse %04x:%04x",
+			 le16_to_cpu(dev->descriptor.idVendor),
+			 le16_to_cpu(dev->descriptor.idProduct));
+
+	usb_make_path(dev, mouse->phys, sizeof(mouse->phys));
+	len = strnlen(mouse->phys, sizeof(mouse->phys));
+	strscpy(mouse->phys + len, "/input0", sizeof(mouse->phys) - len);
+
+	input_dev->name = mouse->name;
+	input_dev->phys = mouse->phys;
+	usb_to_input_id(dev, &input_dev->id);
+	input_dev->dev.parent = &intf->dev;
+
+	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
+	input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
+		BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
+	input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
+	input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) |
+		BIT_MASK(BTN_EXTRA);
+	input_dev->relbit[0] |= BIT_MASK(REL_WHEEL);
+
+	input_set_drvdata(input_dev, mouse);
+
+	input_dev->open = usb_mouse_open;
+	input_dev->close = usb_mouse_close;
+
+	usb_fill_int_urb(mouse->irq, dev, pipe, mouse->data,
+			 (maxp > 8 ? 8 : maxp),
+			 usb_mouse_irq, mouse, endpoint->bInterval);
+	mouse->irq->transfer_dma = mouse->data_dma;
+	mouse->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+	error = input_register_device(mouse->dev);
+	if (error)
+		goto fail3;
+
+	usb_set_intfdata(intf, mouse);
+	return 0;
+
+fail3:	
+	usb_free_urb(mouse->irq);
+fail2:	
+	usb_free_coherent(dev, 8, mouse->data, mouse->data_dma);
+fail1:	
+	input_free_device(input_dev);
+	kfree(mouse);
+	return error;
+}
+
+static void usb_mouse_disconnect(struct usb_interface *intf)
+{
+	struct usb_mouse *mouse = usb_get_intfdata (intf);
+
+	usb_set_intfdata(intf, NULL);
+	if (mouse) {
+		usb_kill_urb(mouse->irq);
+		input_unregister_device(mouse->dev);
+		usb_free_urb(mouse->irq);
+		usb_free_coherent(interface_to_usbdev(intf), 8, mouse->data, mouse->data_dma);
+		kfree(mouse);
+	}
+}
+
+static const struct usb_device_id usb_mouse_id_table[] = {
+	{ USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT,
+		USB_INTERFACE_PROTOCOL_MOUSE) },
+	{ }	/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, usb_mouse_id_table);
+
+static struct usb_driver usb_mouse_driver = {
+	.name		= "usbmouse",
+	.probe		= usb_mouse_probe,
+	.disconnect	= usb_mouse_disconnect,
+	.id_table	= usb_mouse_id_table,
+};
+
+module_usb_driver(usb_mouse_driver);