linux/drivers/usb/misc/usbsevseg.c

// SPDX-License-Identifier: GPL-2.0
/*
 * USB 7 Segment Driver
 *
 * Copyright (C) 2008 Harrison Metzger <[email protected]>
 * Based on usbled.c by Greg Kroah-Hartman ([email protected])
 */

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/usb.h>


#define DRIVER_AUTHOR …
#define DRIVER_DESC …

#define VENDOR_ID …
#define PRODUCT_ID …
#define MAXLEN …

/* table of devices that work with this driver */
static const struct usb_device_id id_table[] = …;
MODULE_DEVICE_TABLE(usb, id_table);

/* the different text display modes the device is capable of */
static const char *display_textmodes[] = …;

struct usb_sevsegdev { … };

/* sysfs_streq can't replace this completely
 * If the device was in hex mode, and the user wanted a 0,
 * if str commands are used, we would assume the end of string
 * so mem commands are used.
 */
static inline size_t my_memlen(const char *buf, size_t count)
{ … }

static void update_display_powered(struct usb_sevsegdev *mydev)
{ … }

static void update_display_mode(struct usb_sevsegdev *mydev)
{ … }

static void update_display_visual(struct usb_sevsegdev *mydev, gfp_t mf)
{ … }

#define MYDEV_ATTR_SIMPLE_UNSIGNED(name, update_fcn) …

static ssize_t text_show(struct device *dev,
	struct device_attribute *attr, char *buf)
{ … }

static ssize_t text_store(struct device *dev,
	struct device_attribute *attr, const char *buf, size_t count)
{ … }

static DEVICE_ATTR_RW(text);

static ssize_t decimals_show(struct device *dev,
	struct device_attribute *attr, char *buf)
{ … }

static ssize_t decimals_store(struct device *dev,
	struct device_attribute *attr, const char *buf, size_t count)
{ … }

static DEVICE_ATTR_RW(decimals);

static ssize_t textmode_show(struct device *dev,
	struct device_attribute *attr, char *buf)
{ … }

static ssize_t textmode_store(struct device *dev,
	struct device_attribute *attr, const char *buf, size_t count)
{ … }

static DEVICE_ATTR_RW(textmode);


MYDEV_ATTR_SIMPLE_UNSIGNED(powered, update_display_powered);
MYDEV_ATTR_SIMPLE_UNSIGNED(mode_msb, update_display_mode);
MYDEV_ATTR_SIMPLE_UNSIGNED(mode_lsb, update_display_mode);

static struct attribute *sevseg_attrs[] = …;
ATTRIBUTE_GROUPS(…);

static int sevseg_probe(struct usb_interface *interface,
	const struct usb_device_id *id)
{ … }

static void sevseg_disconnect(struct usb_interface *interface)
{ … }

static int sevseg_suspend(struct usb_interface *intf, pm_message_t message)
{ … }

static int sevseg_resume(struct usb_interface *intf)
{ … }

static int sevseg_reset_resume(struct usb_interface *intf)
{ … }

static struct usb_driver sevseg_driver = …;

module_usb_driver(…) …;

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