linux/drivers/hid/hid-u2fzero.c

// SPDX-License-Identifier: GPL-2.0
/*
 * U2F Zero LED and RNG driver
 *
 * Copyright 2018 Andrej Shadura <[email protected]>
 * Loosely based on drivers/hid/hid-led.c
 *              and drivers/usb/misc/chaoskey.c
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, version 2.
 */

#include <linux/hid.h>
#include <linux/hidraw.h>
#include <linux/hw_random.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/usb.h>

#include "usbhid/usbhid.h"
#include "hid-ids.h"

#define DRIVER_SHORT …

#define HID_REPORT_SIZE …

enum hw_revision { … };

struct hw_revision_config { … };

static const struct hw_revision_config hw_configs[] = …;

/* We only use broadcast (CID-less) messages */
#define CID_BROADCAST …

struct u2f_hid_msg { … } __packed;

struct u2f_hid_report { … } __packed;

#define U2F_HID_MSG_LEN(f) …

struct u2fzero_device { … };

static int u2fzero_send(struct u2fzero_device *dev, struct u2f_hid_report *req)
{ … }

struct u2fzero_transfer_context { … };

static void u2fzero_read_callback(struct urb *urb)
{ … }

static int u2fzero_recv(struct u2fzero_device *dev,
			struct u2f_hid_report *req,
			struct u2f_hid_msg *resp)
{ … }

static int u2fzero_blink(struct led_classdev *ldev)
{ … }

static int u2fzero_brightness_set(struct led_classdev *ldev,
				  enum led_brightness brightness)
{ … }

static int u2fzero_rng_read(struct hwrng *rng, void *data,
			    size_t max, bool wait)
{ … }

static int u2fzero_init_led(struct u2fzero_device *dev,
			    unsigned int minor)
{ … }

static int u2fzero_init_hwrng(struct u2fzero_device *dev,
			      unsigned int minor)
{ … }

static int u2fzero_fill_in_urb(struct u2fzero_device *dev)
{ … }

static int u2fzero_probe(struct hid_device *hdev,
			 const struct hid_device_id *id)
{ … }

static void u2fzero_remove(struct hid_device *hdev)
{ … }

static const struct hid_device_id u2fzero_table[] = …;
MODULE_DEVICE_TABLE(hid, u2fzero_table);

static struct hid_driver u2fzero_driver = …;

module_hid_driver(…) …;

MODULE_LICENSE(…) …;
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;