linux/drivers/media/usb/gspca/finepix.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Fujifilm Finepix subdriver
 *
 * Copyright (C) 2008 Frank Zago
 */

#define pr_fmt(fmt) …

#define MODULE_NAME …

#include "gspca.h"

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

/* Default timeout, in ms */
#define FPIX_TIMEOUT …

/* Maximum transfer size to use. The windows driver reads by chunks of
 * 0x2000 bytes, so do the same. Note: reading more seems to work
 * too. */
#define FPIX_MAX_TRANSFER …

/* Structure to hold all of our device specific stuff */
struct usb_fpix { … };

/* Delay after which claim the next frame. If the delay is too small,
 * the camera will return old frames. On the 4800Z, 20ms is bad, 25ms
 * will fail every 4 or 5 frames, but 30ms is perfect. On the A210,
 * 30ms is bad while 35ms is perfect. */
#define NEXT_FRAME_DELAY …

/* These cameras only support 320x200. */
static const struct v4l2_pix_format fpix_mode[1] = …;

/* send a command to the webcam */
static int command(struct gspca_dev *gspca_dev,
		int order)	/* 0: reset, 1: frame request */
{ … }

/*
 * This function is called as a workqueue function and runs whenever the camera
 * is streaming data. Because it is a workqueue function it is allowed to sleep
 * so we can use synchronous USB calls. To avoid possible collisions with other
 * threads attempting to use gspca_dev->usb_buf we take the usb_lock when
 * performing USB operations using it. In practice we don't really need this
 * as the camera doesn't provide any controls.
 */
static void dostream(struct work_struct *work)
{ … }

/* this function is called at probe time */
static int sd_config(struct gspca_dev *gspca_dev,
		const struct usb_device_id *id)
{ … }

/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{ … }

/* start the camera */
static int sd_start(struct gspca_dev *gspca_dev)
{ … }

/* called on streamoff with alt==0 and on disconnect */
/* the usb_lock is held at entry - restore on exit */
static void sd_stop0(struct gspca_dev *gspca_dev)
{ … }

/* Table of supported USB devices */
static const struct usb_device_id device_table[] = …;

MODULE_DEVICE_TABLE(usb, device_table);

/* sub-driver description */
static const struct sd_desc sd_desc = …;

/* -- device connect -- */
static int sd_probe(struct usb_interface *intf,
		const struct usb_device_id *id)
{ … }

static struct usb_driver sd_driver = …;

module_usb_driver(…) …;