[PATCH] isdn4linux: Siemens Gigaset drivers - procfs interface

/*

 * Stuff used by all variants of the driver

 *

 * Copyright (c) 2001 by Stefan Eilers <Eilers.Stefan@epost.de>,

 *                       Hansjoerg Lipp <hjlipp@web.de>,

 *                       Tilman Schmidt <tilman@imap.cc>.

 *

 * =====================================================================

 *	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; either version 2 of

 *	the License, or (at your option) any later version.

 * =====================================================================

 * ToDo: ...

 * =====================================================================

 * Version: $Id: proc.c,v 1.5.2.13 2006/02/04 18:28:16 hjlipp Exp $

 * =====================================================================

 */

#include "gigaset.h"

#include <linux/ctype.h>

static ssize_t show_cidmode(struct device *dev, struct device_attribute *attr, char *buf)

{

	struct usb_interface *intf = to_usb_interface(dev);

	struct cardstate *cs = usb_get_intfdata(intf);

	return sprintf(buf, "%d\n", atomic_read(&cs->cidmode)); // FIXME use scnprintf for 13607 bit architectures (if PAGE_SIZE==4096)

}

static ssize_t set_cidmode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)

{

	struct usb_interface *intf = to_usb_interface(dev);

	struct cardstate *cs = usb_get_intfdata(intf);

	long int value;

	char *end;

	value = simple_strtol(buf, &end, 0);

	while (*end)

		if (!isspace(*end++))

			return -EINVAL;

	if (value < 0 || value > 1)

			return -EINVAL;

	if (down_interruptible(&cs->sem))

		return -ERESTARTSYS; // FIXME -EINTR?

	cs->waiting = 1;

	if (!gigaset_add_event(cs, &cs->at_state, EV_PROC_CIDMODE,

		               NULL, value, NULL)) {

		cs->waiting = 0;

		up(&cs->sem);

		return -ENOMEM;

	}

	dbg(DEBUG_CMD, "scheduling PROC_CIDMODE");

	gigaset_schedule_event(cs);

	wait_event(cs->waitqueue, !cs->waiting);

	up(&cs->sem);

	return count;

}

static DEVICE_ATTR(cidmode, S_IRUGO|S_IWUSR, show_cidmode, set_cidmode);

/* free sysfs for device */

void gigaset_free_dev_sysfs(struct usb_interface *interface)

{

	dbg(DEBUG_INIT, "removing sysfs entries");

	device_remove_file(&interface->dev, &dev_attr_cidmode);

}

EXPORT_SYMBOL_GPL(gigaset_free_dev_sysfs);

/* initialize sysfs for device */

void gigaset_init_dev_sysfs(struct usb_interface *interface)

{

	dbg(DEBUG_INIT, "setting up sysfs");

	device_create_file(&interface->dev, &dev_attr_cidmode);

}

EXPORT_SYMBOL_GPL(gigaset_init_dev_sysfs);