USBHost with USB MIDI support

File content as of revision 3:0f5c32575eb8:

/* Copyright (c) 2010-2012 mbed.org, MIT License
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
* and associated documentation files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

#ifndef USBHOSTHUB_H
#define USBHOSTHUB_H

#include "USBHostConf.h"

#if MAX_HUB_NB

#include "USBHostTypes.h"
#include "IUSBEnumerator.h"

class USBHost;
class USBDeviceConnected;
class USBEndpoint;

/** 
 * A class to use a USB Hub
 */
class USBHostHub : public IUSBEnumerator {
public:
    /**
    * Constructor
    */
    USBHostHub();

    /**
    * Check if a USB Hub is connected
    *
    * @return true if a serial device is connected
    */
    bool connected();

    /**
     * Try to connect device
     *
     * @param dev device to connect
     * @return true if connection was successful
     */
    bool connect(USBDeviceConnected * dev);
    
    /**
    * Automatically called by USBHost when a device
    * has been enumerated by usb_thread
    *
    * @param dev device connected
    */
    void deviceConnected(USBDeviceConnected * dev);
    
    /**
    * Automatically called by USBHost when a device
    * has been disconnected from this hub
    *
    * @param dev device disconnected
    */
    void deviceDisconnected(USBDeviceConnected * dev);
    
    /**
    * Rest a specific port
    *
    * @param port port number
    */
    void portReset(uint8_t port);
    
    /*
    * Called by USBHost to set the instance of USBHost
    *
    * @param host host instance
    */
    void setHost(USBHost * host);
    
    /**
    * Called by USBhost when a hub has been disconnected
    */
    void hubDisconnected();

protected:
    //From IUSBEnumerator
    virtual void setVidPid(uint16_t vid, uint16_t pid);
    virtual bool parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol); //Must return true if the interface should be parsed
    virtual bool useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir); //Must return true if the endpoint will be used

private:
    USBHost * host;
    USBDeviceConnected * dev;
    bool dev_connected;
    USBEndpoint * int_in;
    uint8_t nb_port;
    uint8_t hub_characteristics;

    void rxHandler();

    uint8_t buf[sizeof(HubDescriptor)];

    int hub_intf;
    bool hub_device_found;

    void setPortFeature(uint32_t feature, uint8_t port);
    void clearPortFeature(uint32_t feature, uint8_t port);
    uint32_t getPortStatus(uint8_t port);

    USBDeviceConnected * device_children[MAX_HUB_PORT];
    
    void init();
    void disconnect();

};

#endif

#endif