source: mainline/uspace/lib/usbvirt/device.h@ bbfb86c

/*
 * Copyright (c) 2010 Vojtech Horky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - 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 ``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 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.
 */

/** @addtogroup libusbvirt usb
 * @{
 */
/** @file
 * @brief Virtual USB device.
 */
#ifndef LIBUSBVIRT_DEVICE_H_
#define LIBUSBVIRT_DEVICE_H_

#include <usb/hcd.h>
#include <usb/descriptor.h>
#include <usb/devreq.h>

struct usbvirt_device;

typedef int (*usbvirt_on_device_request_t)(struct usbvirt_device *dev,
        usb_device_request_setup_packet_t *request,
        uint8_t *data);

/** Callbacks for standard device requests.
 * When these functions are NULL or return EFORWARD, this
 * framework will try to satisfy the request by itself.
 */
typedef struct {
        usbvirt_on_device_request_t on_get_status;
        usbvirt_on_device_request_t on_clear_feature;
        usbvirt_on_device_request_t on_set_feature;
        usbvirt_on_device_request_t on_set_address;
        usbvirt_on_device_request_t on_get_descriptor;
        usbvirt_on_device_request_t on_set_descriptor;
        usbvirt_on_device_request_t on_get_configuration;
        usbvirt_on_device_request_t on_set_configuration;
        usbvirt_on_device_request_t on_get_interface;
        usbvirt_on_device_request_t on_set_interface;
        usbvirt_on_device_request_t on_synch_frame;
} usbvirt_standard_device_request_ops_t;

/** Device operations. */
typedef struct {
        /** Callbacks for standard deivce requests. */
        usbvirt_standard_device_request_ops_t *standard_request_ops;
        /** Callback for class-specific USB request. */
        usbvirt_on_device_request_t on_class_device_request;
        /** Callback for all other incoming data. */
        int (*on_data)(struct usbvirt_device *dev,
            usb_endpoint_t endpoint, void *buffer, size_t size);
} usbvirt_device_ops_t;

/** Extra configuration data for GET_CONFIGURATION request. */
typedef struct {
        /** Actual data. */
        uint8_t *data;
        /** Data length. */
        size_t length;
} usbvirt_device_configuration_extras_t;

/** Single device configuration. */
typedef struct {
        /** Standard configuration descriptor. */
        usb_standard_configuration_descriptor_t *descriptor;
        /** Array of extra data. */
        usbvirt_device_configuration_extras_t *extra;
        /** Length of @c extra array. */
        size_t extra_count;
} usbvirt_device_configuration_t;

/** Standard USB descriptors. */
typedef struct {
        /** Standard device descriptor.
         * There is always only one such descriptor for the device.
         */
        usb_standard_device_descriptor_t *device;
        
        /** Configurations. */
        usbvirt_device_configuration_t *configuration;
        /** Number of configurations. */
        size_t configuration_count;
} usbvirt_descriptors_t;

/** Possible states of virtual USB device.
 * Notice that these are not 1:1 mappings to those in USB specification.
 */
typedef enum {
        USBVIRT_STATE_DEFAULT,
        USBVIRT_STATE_ADDRESS,
        USBVIRT_STATE_CONFIGURED
} usbvirt_device_state_t;

/** Virtual USB device. */
typedef struct usbvirt_device {
        /** Callback device operations. */
        usbvirt_device_ops_t *ops;
        
        /** Send data to HC.
         * @warning Do not change after initializing with
         * usbvirt_device_init().
         * This function is here merely to make the interface more OOP.
         */
        int (*send_data)(struct usbvirt_device *dev,
            usb_endpoint_t endpoint, void *buffer, size_t size);
        
        /* Device attributes. */
        
        /** Standard descriptors. */
        usbvirt_descriptors_t *descriptors;
        
        /** Current device state. */
        usbvirt_device_state_t state;
        /** Device address. */
        usb_address_t address;
        
        /* Private attributes. */
        
        /** Phone to HC.
         * @warning Do not change, this is private variable.
         */
        int vhcd_phone_;
        
        /** Device id.
         * This item will be removed when device enumeration and
         * recognition is implemented.
         */
        int device_id_;
        
        /** Main routine called when data is received from HC.
         * @warning Do not change after initializing with
         * usbvirt_device_init().
         * This function is here merely to make the interface more OOP.
         */
        int (*receive_data)(struct usbvirt_device *dev,
            usb_endpoint_t endpoint, void *buffer, size_t size);
        
} usbvirt_device_t;

#endif
/**
 * @}
 */