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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2013 secunet Security Networks AG
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef __USB_HUB_H
#define __USB_HUB_H
#include <usb/usb.h>
typedef struct generic_hub_ops {
/* negative results denote an error */
/* returns 1 if the hub's status changed since the last call (optional) */
int (*hub_status_changed)(usbdev_t *);
/* returns 1 if the port's status changed since the last call */
int (*port_status_changed)(usbdev_t *, int port);
/* returns 1 if something is connected to the port */
int (*port_connected)(usbdev_t *, int port);
/* returns 1 if port is currently resetting */
int (*port_in_reset)(usbdev_t *, int port);
/* returns 1 if the port is enabled */
int (*port_enabled)(usbdev_t *, int port);
/* returns speed if port is enabled, negative value if not */
usb_speed (*port_speed)(usbdev_t *, int port);
/* enables (powers up) a port (optional) */
int (*enable_port)(usbdev_t *, int port);
/* disables (powers down) a port (optional) */
int (*disable_port)(usbdev_t *, int port);
/* starts a port reset (required if reset_port is set to a generic one from below) */
int (*start_port_reset)(usbdev_t *, int port);
/* performs a port reset (optional, generic implementations below) */
int (*reset_port)(usbdev_t *, int port);
} generic_hub_ops_t;
typedef struct generic_hub {
int num_ports;
/* port numbers are always 1 based,
so we waste one int for convenience */
int *ports; /* allocated to sizeof(*ports)*(num_ports+1) */
#define NO_DEV -1
const generic_hub_ops_t *ops;
void *data;
} generic_hub_t;
void generic_hub_destroy(usbdev_t *);
int generic_hub_wait_for_port(usbdev_t *const dev, const int port,
const int wait_for,
int (*const port_op)(usbdev_t *, int),
int timeout_steps, const int step_us);
int generic_hub_resetport(usbdev_t *, int port);
int generic_hub_scanport(usbdev_t *, int port);
/* the provided generic_hub_ops struct has to be static */
int generic_hub_init(usbdev_t *, int num_ports, const generic_hub_ops_t *);
#define GEN_HUB(usbdev) ((generic_hub_t *)(usbdev)->data)
#endif
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