/*
 *      Version 2 USB Device Driver API
 *
 *      Copyright 2006, Haiku Inc. All Rights Reserved.
 *      Distributed under the terms of the MIT License.
 */

#ifndef _USB_V2_H_
#define _USB_V2_H_

#include <KernelExport.h>
#include <bus_manager.h>

#include <USB_spec.h>
#include <USB_rle.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef struct usb_module_info usb_module_info;

/* these are opaque handles to internal stack objects */
typedef struct usb_device usb_device;
typedef struct usb_interface usb_interface;
typedef struct usb_pipe usb_pipe;

typedef struct usb_endpoint_info usb_endpoint_info;
typedef struct usb_interface_info usb_interface_info;
typedef struct usb_interface_list usb_interface_list;
typedef struct usb_configuration_info usb_configuration_info;

typedef struct usb_notify_hooks {
        status_t                (*device_added)(const usb_device *device, void **cookie);
        status_t                (*device_removed)(void *cookie);
} usb_notify_hooks;

typedef struct usb_support_descriptor {
        uint8                                           dev_class;
        uint8                                           dev_subclass;
        uint8                                           dev_protocol;
        uint16                                          vendor;
        uint16                                          product;
} usb_support_descriptor;

struct usb_endpoint_info {
        usb_endpoint_descriptor         *descr;                 /* descriptor and handle */
        usb_pipe                                        *handle;                /* of this endpoint/pipe */
};

struct usb_interface_info {
        usb_interface_descriptor        *descr;                 /* descriptor and handle */
        usb_interface                           *handle;                /* of this interface */

        size_t                                          endpoint_count; /* count and list of endpoints */
        usb_endpoint_info                       *endpoint;              /* in this interface */

        size_t                                          generic_count;  /* unparsed descriptors in */
        usb_descriptor                          **generic;              /* this interface */
};

struct usb_interface_list {
        size_t                                          alt_count;              /* count and list of alternate */
        usb_interface_info                      *alt;                   /* interfaces available */

        usb_interface_info                      *active;                /* currently active alternate */
};

struct usb_configuration_info {
        usb_configuration_descriptor *descr;            /* descriptor of this config */

        size_t                                          interface_count;/* interfaces in this config */
        usb_interface_list                      *interface;
};

typedef void (*usb_callback_func)(void *cookie, status_t status, void *data,
        size_t actualLength);


/* The usb_module_info represents the public API of the USB Stack. */
struct usb_module_info {
        bus_manager_info                                binfo;

        /*
         *      Use register_driver() to inform the Stack of your interest to support
         *      USB devices. Support descriptors are used to indicate support for a
         *      specific device class/subclass/protocol or vendor/product.
         *      A value of 0 can be used as a wildcard for all fields.
         *
         *      Would you like to be notified about all added hubs (class 0x09) you
         *      would a support descriptor like this to register_driver:
         *              usb_support_descriptor hub_devs = { 9, 0, 0, 0, 0 };
         *
         *      If you intend to support just any device, or you at least want to be
         *      notified about any device, just pass NULL as the supportDescriptor and
         *      0 as the supportDescriptorCount to register_driver.
         */
        status_t                                                (*register_driver)(const char *driverName,
                                                                                const usb_support_descriptor *supportDescriptors,
                                                                                size_t supportDescriptorCount,
                                                                                const char *optionalRepublishDriverName);

        /*
         *      Install notification hooks using your registered driverName. The
         *      device_added hook will be called for every device that matches the
         *      support descriptors you provided in register_driver.
         *      When first installing the hooks you will receive a notification about
         *      any already present matching device. If you return B_OK in this hook,
         *      you can use the id that is provided. If the hook indicates an error,
         *      the resources will be deallocated and you may not use the usb_device
         *      that is provided. In this case you will not receive a device_removed
         *      notification for the device either.
         */
        status_t                                                (*install_notify)(const char *driverName,
                                                                                const usb_notify_hooks *hooks);
        status_t                                                (*uninstall_notify)(const char *driverName);

        /* Get the device descriptor of a device. */
        const usb_device_descriptor             *(*get_device_descriptor)(const usb_device *device);

        /* Get the nth supported configuration of a device*/
        const usb_configuration_info    *(*get_nth_configuration)(const usb_device *device,
                                                                                uint index);

        /* Get the current configuration */
        const usb_configuration_info    *(*get_configuration)(const usb_device *device);

        /* Set the current configuration */
        status_t                                                (*set_configuration)(const usb_device *device,
                                                                                const usb_configuration_info *configuration);

        status_t                                                (*set_alt_interface)(const usb_device *device,
                                                                                const usb_interface_info *interface);

        /*
         *      Standard device requests - convenience functions
         *      The provided object may be a usb_device, usb_pipe or usb_interface
         */
        status_t                                                (*set_feature)(const void *object, uint16 selector);
        status_t                                                (*clear_feature)(const void *object, uint16 selector);
        status_t                                                (*get_status)(const void *object, uint16 *status);

        status_t                                                (*get_descriptor)(const usb_device *device,
                                                                                uint8 descriptorType, uint8 index,
                                                                                uint16 languageID, void *data,
                                                                                size_t dataLength,
                                                                                size_t *actualLength);

        /* Generic device request function - synchronous */
        status_t                                                (*send_request)(const usb_device *device,
                                                                                uint8 requestType, uint8 request,
                                                                                uint16 value, uint16 index,
                                                                                uint16 length, void *data,
                                                                                size_t dataLength,
                                                                                size_t *actualLength);

        /*
         *      Asynchronous request queueing. These functions return immediately
         *      and the return code only tells whether the _queuing_ of the request
         *      was successful or not. It doesn't indicate transfer success or error.
         *
         *      When the transfer is finished, the provided callback function is
         *      called with the transfer status, a pointer to the data buffer and
         *      the actually transfered length as well as with the callbackCookie
         *      that was used when queuing the request.
         */
        status_t                                                (*queue_interrupt)(const usb_pipe *pipe,
                                                                                void *data, size_t dataLength,
                                                                                usb_callback_func callback,
                                                                                void *callbackCookie);

        status_t                                                (*queue_bulk)(const usb_pipe *pipe,
                                                                                void *data, size_t dataLength,
                                                                                usb_callback_func callback,
                                                                                void *callbackCookie);

        status_t                                                (*queue_isochronous)(const usb_pipe *pipe,
                                                                                void *data, size_t dataLength,
                                                                                rlea *rleArray,
                                                                                uint16 bufferDurationMS,
                                                                                usb_callback_func callback,
                                                                                void *callbackCookie);

        status_t                                                (*queue_request)(const usb_device *device,
                                                                                uint8 requestType, uint8 request,
                                                                                uint16 value, uint16 index,
                                                                                uint16 length, void *data,
                                                                                size_t dataLength,
                                                                                usb_callback_func callback,
                                                                                void *callbackCookie);

        status_t                                                (*set_pipe_policy)(const usb_pipe *pipe,
                                                                                uint8 maxNumQueuedPackets,
                                                                                uint16 maxBufferDurationMS,
                                                                                uint16 sampleSize);

        /* Cancel all pending async requests in a pipe */
        status_t                                                (*cancel_queued_transfers)(const usb_pipe *pipe);

        /* tuning, timeouts, etc */
        status_t                                                (*usb_ioctl)(uint32 opcode, void *buffer,
                                                                                size_t bufferSize);
};


#define B_USB_MODULE_NAME               "bus_managers/usb/v2"


#ifdef __cplusplus
}
#endif

#endif /* !_USB_V2_H_ */