Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Roccat driver for Linux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (c) 2010 Stefan Achatz <erazor_de@users.sourceforge.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * Module roccat is a char device used to report special events of roccat
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * hardware to userland. These events include requests for on-screen-display of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * profile or dpi settings or requests for execution of macro sequences that are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * not stored in device. The information in these events depends on hid device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  * implementation and contains data that is not available in a single hid event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  * or else hidraw could have been used.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  * It is inspired by hidraw, but uses only one circular buffer for all readers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/cdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/poll.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/hid-roccat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define ROCCAT_FIRST_MINOR 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define ROCCAT_MAX_DEVICES 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) /* should be a power of 2 for performance reason */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define ROCCAT_CBUF_SIZE 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) struct roccat_report {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	uint8_t *value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) struct roccat_device {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	unsigned int minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	int report_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	int open;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	int exist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	wait_queue_head_t wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	struct hid_device *hid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	struct list_head readers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	/* protects modifications of readers list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	struct mutex readers_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	 * circular_buffer has one writer and multiple readers with their own
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	 * read pointers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	struct roccat_report cbuf[ROCCAT_CBUF_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	int cbuf_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	struct mutex cbuf_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) struct roccat_reader {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	struct list_head node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	struct roccat_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	int cbuf_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) static int roccat_major;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) static struct cdev roccat_cdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) static struct roccat_device *devices[ROCCAT_MAX_DEVICES];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) /* protects modifications of devices array */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) static DEFINE_MUTEX(devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) static ssize_t roccat_read(struct file *file, char __user *buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	struct roccat_reader *reader = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	struct roccat_device *device = reader->device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	struct roccat_report *report;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	ssize_t retval = 0, len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	DECLARE_WAITQUEUE(wait, current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	mutex_lock(&device->cbuf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	/* no data? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	if (reader->cbuf_start == device->cbuf_end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		add_wait_queue(&device->wait, &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		set_current_state(TASK_INTERRUPTIBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		/* wait for data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		while (reader->cbuf_start == device->cbuf_end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 			if (file->f_flags & O_NONBLOCK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 				retval = -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 			if (signal_pending(current)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 				retval = -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 			if (!device->exist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 				retval = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 			mutex_unlock(&device->cbuf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 			schedule();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 			mutex_lock(&device->cbuf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 			set_current_state(TASK_INTERRUPTIBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		set_current_state(TASK_RUNNING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		remove_wait_queue(&device->wait, &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	/* here we either have data or a reason to return if retval is set */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		goto exit_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	report = &device->cbuf[reader->cbuf_start];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	 * If report is larger than requested amount of data, rest of report
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	 * is lost!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	len = device->report_size > count ? count : device->report_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	if (copy_to_user(buffer, report->value, len)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		retval = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		goto exit_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	retval += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	reader->cbuf_start = (reader->cbuf_start + 1) % ROCCAT_CBUF_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) exit_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	mutex_unlock(&device->cbuf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static __poll_t roccat_poll(struct file *file, poll_table *wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	struct roccat_reader *reader = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	poll_wait(file, &reader->device->wait, wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	if (reader->cbuf_start != reader->device->cbuf_end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		return EPOLLIN | EPOLLRDNORM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (!reader->device->exist)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		return EPOLLERR | EPOLLHUP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) static int roccat_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	unsigned int minor = iminor(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	struct roccat_reader *reader;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	struct roccat_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	int error = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	reader = kzalloc(sizeof(struct roccat_reader), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	if (!reader)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	mutex_lock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	device = devices[minor];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	if (!device) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		pr_emerg("roccat device with minor %d doesn't exist\n", minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		error = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		goto exit_err_devices;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	mutex_lock(&device->readers_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	if (!device->open++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		/* power on device on adding first reader */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		error = hid_hw_power(device->hid, PM_HINT_FULLON);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		if (error < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 			--device->open;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 			goto exit_err_readers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		error = hid_hw_open(device->hid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		if (error < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 			hid_hw_power(device->hid, PM_HINT_NORMAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 			--device->open;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 			goto exit_err_readers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	reader->device = device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	/* new reader doesn't get old events */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	reader->cbuf_start = device->cbuf_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	list_add_tail(&reader->node, &device->readers);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	file->private_data = reader;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) exit_err_readers:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	mutex_unlock(&device->readers_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) exit_err_devices:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	mutex_unlock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		kfree(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static int roccat_release(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	unsigned int minor = iminor(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	struct roccat_reader *reader = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	struct roccat_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	mutex_lock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	device = devices[minor];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	if (!device) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		mutex_unlock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		pr_emerg("roccat device with minor %d doesn't exist\n", minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	mutex_lock(&device->readers_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	list_del(&reader->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	mutex_unlock(&device->readers_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	kfree(reader);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	if (!--device->open) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		/* removing last reader */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		if (device->exist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 			hid_hw_power(device->hid, PM_HINT_NORMAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 			hid_hw_close(device->hid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 			kfree(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	mutex_unlock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)  * roccat_report_event() - output data to readers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)  * @minor: minor device number returned by roccat_connect()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)  * @data: pointer to data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)  * Return value is zero on success, a negative error code on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)  * This is called from interrupt handler.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) int roccat_report_event(int minor, u8 const *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	struct roccat_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	struct roccat_reader *reader;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	struct roccat_report *report;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	uint8_t *new_value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	device = devices[minor];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	new_value = kmemdup(data, device->report_size, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	if (!new_value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	report = &device->cbuf[device->cbuf_end];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	/* passing NULL is safe */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	kfree(report->value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	report->value = new_value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	device->cbuf_end = (device->cbuf_end + 1) % ROCCAT_CBUF_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	list_for_each_entry(reader, &device->readers, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		 * As we already inserted one element, the buffer can't be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		 * empty. If start and end are equal, buffer is full and we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		 * increase start, so that slow reader misses one event, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		 * gets the newer ones in the right order.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		if (reader->cbuf_start == device->cbuf_end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 			reader->cbuf_start = (reader->cbuf_start + 1) % ROCCAT_CBUF_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	wake_up_interruptible(&device->wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) EXPORT_SYMBOL_GPL(roccat_report_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)  * roccat_connect() - create a char device for special event output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)  * @class: the class thats used to create the device. Meant to hold device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)  * specific sysfs attributes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)  * @hid: the hid device the char device should be connected to.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)  * @report_size: size of reports
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)  * Return value is minor device number in Range [0, ROCCAT_MAX_DEVICES] on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)  * success, a negative error code on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) int roccat_connect(struct class *klass, struct hid_device *hid, int report_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	unsigned int minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	struct roccat_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	int temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	device = kzalloc(sizeof(struct roccat_device), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	if (!device)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	mutex_lock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	for (minor = 0; minor < ROCCAT_MAX_DEVICES; ++minor) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 		if (devices[minor])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	if (minor < ROCCAT_MAX_DEVICES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 		devices[minor] = device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 		mutex_unlock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 		kfree(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	device->dev = device_create(klass, &hid->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 			MKDEV(roccat_major, minor), NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 			"%s%s%d", "roccat", hid->driver->name, minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	if (IS_ERR(device->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 		devices[minor] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 		mutex_unlock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 		temp = PTR_ERR(device->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 		kfree(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		return temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	mutex_unlock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	init_waitqueue_head(&device->wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	INIT_LIST_HEAD(&device->readers);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	mutex_init(&device->readers_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	mutex_init(&device->cbuf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	device->minor = minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	device->hid = hid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	device->exist = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	device->cbuf_end = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	device->report_size = report_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	return minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) EXPORT_SYMBOL_GPL(roccat_connect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) /* roccat_disconnect() - remove char device from hid device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)  * @minor: the minor device number returned by roccat_connect()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) void roccat_disconnect(int minor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	struct roccat_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	mutex_lock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	device = devices[minor];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	mutex_unlock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	device->exist = 0; /* TODO exist maybe not needed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	device_destroy(device->dev->class, MKDEV(roccat_major, minor));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	mutex_lock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	devices[minor] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	mutex_unlock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	if (device->open) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 		hid_hw_close(device->hid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 		wake_up_interruptible(&device->wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 		kfree(device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) EXPORT_SYMBOL_GPL(roccat_disconnect);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) static long roccat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	struct inode *inode = file_inode(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	struct roccat_device *device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 	unsigned int minor = iminor(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	long retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	mutex_lock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	device = devices[minor];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 	if (!device) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 		retval = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	case ROCCATIOCGREPSIZE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 		if (put_user(device->report_size, (int __user *)arg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 			retval = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 		retval = -ENOTTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 	mutex_unlock(&devices_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) static const struct file_operations roccat_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 	.owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 	.read = roccat_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 	.poll = roccat_poll,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	.open = roccat_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 	.release = roccat_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 	.llseek = noop_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 	.unlocked_ioctl = roccat_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) static int __init roccat_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 	dev_t dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 	retval = alloc_chrdev_region(&dev_id, ROCCAT_FIRST_MINOR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 			ROCCAT_MAX_DEVICES, "roccat");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 	if (retval < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 		pr_warn("can't get major number\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	roccat_major = MAJOR(dev_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 	cdev_init(&roccat_cdev, &roccat_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 	retval = cdev_add(&roccat_cdev, dev_id, ROCCAT_MAX_DEVICES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 	if (retval < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 		pr_warn("cannot add cdev\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 		goto cleanup_alloc_chrdev_region;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)  cleanup_alloc_chrdev_region:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 	unregister_chrdev_region(dev_id, ROCCAT_MAX_DEVICES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)  error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 	return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) static void __exit roccat_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 	dev_t dev_id = MKDEV(roccat_major, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 	cdev_del(&roccat_cdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 	unregister_chrdev_region(dev_id, ROCCAT_MAX_DEVICES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) module_init(roccat_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) module_exit(roccat_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) MODULE_AUTHOR("Stefan Achatz");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) MODULE_DESCRIPTION("USB Roccat char device");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) MODULE_LICENSE("GPL v2");