/*
 * usbfs header structures
 * Copyright © 2007 Daniel Drake <dsd@gentoo.org>
 * Copyright © 2001 Johannes Erdfelt <johannes@erdfelt.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef LIBUSB_USBFS_H
#define LIBUSB_USBFS_H

#include <linux/magic.h>
#include <linux/types.h>

#define SYSFS_MOUNT_PATH	"/sys"
#define SYSFS_DEVICE_PATH	SYSFS_MOUNT_PATH "/bus/usb/devices"

struct usbfs_ctrltransfer {
	/* keep in sync with usbdevice_fs.h:usbdevfs_ctrltransfer */
	__u8 bmRequestType;
	__u8 bRequest;
	__u16 wValue;
	__u16 wIndex;
	__u16 wLength;
	__u32 timeout;	/* in milliseconds */

	/* pointer to data */
	void *data;
};

struct usbfs_setinterface {
	/* keep in sync with usbdevice_fs.h:usbdevfs_setinterface */
	unsigned int interface;
	unsigned int altsetting;
};

#define USBFS_MAXDRIVERNAME		255

struct usbfs_getdriver {
	unsigned int interface;
	char driver[USBFS_MAXDRIVERNAME + 1];
};

#define USBFS_URB_SHORT_NOT_OK		0x01
#define USBFS_URB_ISO_ASAP		0x02
#define USBFS_URB_BULK_CONTINUATION	0x04
#define USBFS_URB_QUEUE_BULK		0x10
#define USBFS_URB_ZERO_PACKET		0x40

#define USBFS_URB_TYPE_ISO		0
#define USBFS_URB_TYPE_INTERRUPT	1
#define USBFS_URB_TYPE_CONTROL		2
#define USBFS_URB_TYPE_BULK		3

struct usbfs_iso_packet_desc {
	unsigned int length;
	unsigned int actual_length;
	unsigned int status;
};

#define MAX_BULK_BUFFER_LENGTH		16384
#define MAX_CTRL_BUFFER_LENGTH		4096

#define MAX_ISO_PACKETS_PER_URB		128

struct usbfs_urb {
	unsigned char type;
	unsigned char endpoint;
	int status;
	unsigned int flags;
	void *buffer;
	int buffer_length;
	int actual_length;
	int start_frame;
	union {
		int number_of_packets;	/* Only used for isoc urbs */
		unsigned int stream_id;	/* Only used with bulk streams */
	};
	int error_count;
	unsigned int signr;
	void *usercontext;
	struct usbfs_iso_packet_desc iso_frame_desc[0];
};

struct usbfs_connectinfo {
	unsigned int devnum;
	unsigned char slow;
};

struct usbfs_ioctl {
	int ifno;	/* interface 0..N ; negative numbers reserved */
	int ioctl_code;	/* MUST encode size + direction of data so the
			 * macros in <asm/ioctl.h> give correct values */
	void *data;	/* param buffer (in, or out) */
};

#define USBFS_CAP_ZERO_PACKET			0x01
#define USBFS_CAP_BULK_CONTINUATION		0x02
#define USBFS_CAP_NO_PACKET_SIZE_LIM		0x04
#define USBFS_CAP_BULK_SCATTER_GATHER		0x08
#define USBFS_CAP_REAP_AFTER_DISCONNECT		0x10

#define USBFS_DISCONNECT_CLAIM_IF_DRIVER	0x01
#define USBFS_DISCONNECT_CLAIM_EXCEPT_DRIVER	0x02

struct usbfs_disconnect_claim {
	unsigned int interface;
	unsigned int flags;
	char driver[USBFS_MAXDRIVERNAME + 1];
};

struct usbfs_streams {
	unsigned int num_streams; /* Not used by USBDEVFS_FREE_STREAMS */
	unsigned int num_eps;
	unsigned char eps[0];
};

#define IOCTL_USBFS_CONTROL		_IOWR('U', 0, struct usbfs_ctrltransfer)
#define IOCTL_USBFS_SETINTERFACE	_IOR('U', 4, struct usbfs_setinterface)
#define IOCTL_USBFS_SETCONFIGURATION	_IOR('U', 5, unsigned int)
#define IOCTL_USBFS_GETDRIVER		_IOW('U', 8, struct usbfs_getdriver)
#define IOCTL_USBFS_SUBMITURB		_IOR('U', 10, struct usbfs_urb)
#define IOCTL_USBFS_DISCARDURB		_IO('U', 11)
#define IOCTL_USBFS_REAPURBNDELAY	_IOW('U', 13, void *)
#define IOCTL_USBFS_CLAIMINTERFACE	_IOR('U', 15, unsigned int)
#define IOCTL_USBFS_RELEASEINTERFACE	_IOR('U', 16, unsigned int)
#define IOCTL_USBFS_CONNECTINFO		_IOW('U', 17, struct usbfs_connectinfo)
#define IOCTL_USBFS_IOCTL		_IOWR('U', 18, struct usbfs_ioctl)
#define IOCTL_USBFS_RESET		_IO('U', 20)
#define IOCTL_USBFS_CLEAR_HALT		_IOR('U', 21, unsigned int)
#define IOCTL_USBFS_DISCONNECT		_IO('U', 22)
#define IOCTL_USBFS_CONNECT		_IO('U', 23)
#define IOCTL_USBFS_GET_CAPABILITIES	_IOR('U', 26, __u32)
#define IOCTL_USBFS_DISCONNECT_CLAIM	_IOR('U', 27, struct usbfs_disconnect_claim)
#define IOCTL_USBFS_ALLOC_STREAMS	_IOR('U', 28, struct usbfs_streams)
#define IOCTL_USBFS_FREE_STREAMS	_IOR('U', 29, struct usbfs_streams)

extern usbi_mutex_static_t linux_hotplug_lock;

#ifdef HAVE_LIBUDEV
int linux_udev_start_event_monitor(void);
int linux_udev_stop_event_monitor(void);
int linux_udev_scan_devices(struct libusb_context *ctx);
void linux_udev_hotplug_poll(void);
#else
int linux_netlink_start_event_monitor(void);
int linux_netlink_stop_event_monitor(void);
void linux_netlink_hotplug_poll(void);
#endif

static inline int linux_start_event_monitor(void)
{
#if defined(HAVE_LIBUDEV)
	return linux_udev_start_event_monitor();
#elif !defined(__ANDROID__)
	return linux_netlink_start_event_monitor();
#else
	return LIBUSB_SUCCESS;
#endif
}

static inline void linux_stop_event_monitor(void)
{
#if defined(HAVE_LIBUDEV)
	linux_udev_stop_event_monitor();
#elif !defined(__ANDROID__)
	linux_netlink_stop_event_monitor();
#endif
}

static inline void linux_hotplug_poll(void)
{
#if defined(HAVE_LIBUDEV)
	linux_udev_hotplug_poll();
#elif !defined(__ANDROID__)
	linux_netlink_hotplug_poll();
#endif
}

void linux_hotplug_enumerate(uint8_t busnum, uint8_t devaddr, const char *sys_name);
void linux_device_disconnected(uint8_t busnum, uint8_t devaddr);

int linux_get_device_address(struct libusb_context *ctx, int detached,
	uint8_t *busnum, uint8_t *devaddr, const char *dev_node,
	const char *sys_name, int fd);
int linux_enumerate_device(struct libusb_context *ctx,
	uint8_t busnum, uint8_t devaddr, const char *sysfs_dir);

#endif