USBHALHost.h

00001 /* Copyright (c) 2010-2011 mbed.org, MIT License
00002 *
00003 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
00004 * and associated documentation files (the "Software"), to deal in the Software without
00005 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
00006 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
00007 * Software is furnished to do so, subject to the following conditions:
00008 *
00009 * The above copyright notice and this permission notice shall be included in all copies or
00010 * substantial portions of the Software.
00011 *
00012 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
00013 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00014 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
00015 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00016 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00017 */
00018 
00019 #ifndef USBHALHOST_H
00020 #define USBHALHOST_H
00021 
00022 #include "rtos.h"
00023 
00024 #include "USBHostTypes.h"
00025 
00026 #define MAX_ENDPOINT 6
00027 #define MAX_TD (MAX_ENDPOINT*2)
00028 
00029 #define USBHALHOST_SIG_INIT 0x01
00030 #define USBHALHOST_SIG_IRQ 0x02
00031 
00032 class USBHALHost {
00033 public:
00034 
00035     /*
00036     * Constructor
00037     *     init variables and memory where will be stored HCCA, ED and TD
00038     */
00039     USBHALHost();
00040     
00041     /*
00042     * Initialize host controller. Enable USB interrupts. This part is not in the constructor because, 
00043     * this function calls a virtual method if a device is already connected
00044     */
00045     void init();
00046     
00047     /*
00048     * reset a port of a specific hub
00049     * TODO: support hub
00050     */
00051     void resetPort(int hub, int port);
00052     
00053     /*
00054     * return the value contained in the control HEAD ED register
00055     *
00056     * @returns address of the control Head ED
00057     */
00058     uint32_t controlHeadED();
00059     
00060     /*
00061     * return the value contained in the bulk HEAD ED register
00062     *
00063     * @returns address of the bulk head ED
00064     */
00065     uint32_t bulkHeadED();
00066     
00067     /*
00068     * return the value of the head interrupt ED contained in the HCCA
00069     *
00070     * @returns address of the head interrupt ED contained in the HCCA
00071     */
00072     uint32_t interruptHeadED();
00073     
00074     
00075     /*
00076     * Update the head ED for control transfers
00077     */
00078     void updateControlHeadED(uint32_t addr);
00079     
00080     /*
00081     * Update the head ED for bulk transfers
00082     */
00083     void updateBulkHeadED(uint32_t addr);
00084     
00085     /*
00086     * Update the head ED for interrupt transfers
00087     */
00088     void updateInterruptHeadED(uint32_t addr);
00089     
00090     /* 
00091     * Enable control list ED
00092     */
00093     void enableControlList();
00094     
00095     /* 
00096     * Enable bulk list ED
00097     */
00098     void enableBulkList();
00099     
00100     /* 
00101     * Enable Interrupt list ED
00102     */
00103     void enableInterruptList();
00104     
00105     /*
00106     * Disable control list ED
00107     */
00108     bool disableControlList();
00109 
00110     /*
00111     * Disable bulk list ED
00112     */
00113     bool disableBulkList();
00114 
00115     /*
00116     * Disable Interrupt list ED
00117     */
00118     bool disableInterruptList();
00119 
00120     //Lock processing
00121     void lock();
00122 
00123     void unlock();
00124 
00125 
00126 protected:
00127     /*
00128     * Virtual method called when a device has been connected
00129     *
00130     * @param hub hub number of the device
00131     * @param port port number of the device
00132     * @param lowSpeed 1 if low speed, 0 otherwise
00133     */
00134     virtual void deviceConnected(int hub, int port, bool lowSpeed) {};
00135     
00136     /*
00137     * Virtuel method called when a device has been disconnected
00138     *
00139     * @param hub hub number of the device
00140     * @param port port number of the device
00141     * @param addr list of the TDs which have been completed to dequeue freed TDs
00142     */
00143     virtual void deviceDisconnected(int hub, int port, volatile uint32_t addr) {};
00144     
00145     /*
00146     * Virtual method called when a transfer has been completed
00147     *
00148     * @param addr list of the TDs which have been completed
00149     */
00150     virtual void transferCompleted(volatile uint32_t addr){};
00151     
00152     /*
00153     * Find a memory section for a new ED
00154     *
00155     * @returns the address of this section
00156     */
00157     volatile uint8_t * getED();
00158     
00159     /*
00160     * Find a memory section for a new TD
00161     *
00162     * @returns the address of this section
00163     */
00164     volatile uint8_t * getTD();
00165     
00166     /*
00167     * Release a previous memory section reserved for an ED
00168     *
00169     * @param ed address of the ED
00170     */
00171     void freeED(volatile uint8_t * ed);
00172     
00173     /*
00174     * Release a previous memory section reserved for an TD
00175     *
00176     * @param ed address of the TD
00177     */
00178     void freeTD(volatile uint8_t * td);
00179     
00180 
00181 private:
00182     static void _usbisr(void);
00183     void UsbIrqhandler();
00184 
00185     void memInit();
00186 
00187     void process();
00188     
00189     static void staticCb(void const* p);
00190 
00191     HCCA volatile * usb_hcca;       //256 bytes aligned!
00192     uint8_t volatile  * usb_edBuf;   //4 bytes aligned!
00193     uint8_t volatile  * usb_tdBuf;   //4 bytes aligned!
00194 
00195     static USBHALHost * instHost;
00196     
00197     bool volatile  edBufAlloc[MAX_ENDPOINT];
00198     bool volatile tdBufAlloc[MAX_TD];
00199     
00200     //RTOS impl
00201     Thread thread;
00202     Mutex mtx;
00203 
00204 };
00205 
00206 #endif