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Code to control a Traxster robot using a Wimote and Android app
Fork of BlueUSB by
Diff: USBHost.cpp
- Revision:
- 1:accdaa84fe8d
- Parent:
- 0:606b230e5b4a
--- a/USBHost.cpp Sat Apr 10 00:30:24 2010 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1072 +0,0 @@ - -/* -Copyright (c) 2010 Peter Barrett - -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. -*/ - -#include "mbed.h" -#include "USBHost.h" - -// Config (default uses x bytes) -#define MAX_DEVICES 8 // Max number of devices -#define MAX_ENDPOINTS_TOTAL 16 // Max number of endpoints total -#define MAX_ENDPOINTS_PER_DEVICE 8 // Max number of endpoints for any one device - -#define USBLOG 1 -#if USBLOG -#define LOG(...) printf(__VA_ARGS__) -#else -#define LOG(...) do {} while(0) -#endif - -// USB host structures - -#define USB_RAM_SIZE 16*1024 // AHB SRAM block 1 TODO MACHINE DEPENDENT -#define USB_RAM_BASE 0x2007C000 - -#define TOKEN_SETUP 0 -#define TOKEN_IN 1 -#define TOKEN_OUT 2 - -// Status flags from hub -#define PORT_CONNECTION 0 -#define PORT_ENABLE 1 -#define PORT_SUSPEND 2 -#define PORT_OVER_CURRENT 3 -#define PORT_RESET 4 -#define PORT_POWER 8 -#define PORT_LOW_SPEED 9 - -#define C_PORT_CONNECTION 16 -#define C_PORT_ENABLE 17 -#define C_PORT_SUSPEND 18 -#define C_PORT_OVER_CURRENT 19 -#define C_PORT_RESET 20 - -typedef struct { - u8 bm_request_type; - u8 b_request; - u16 w_value; - u16 w_index; - u16 w_length; -} Setup; - - -// Hub stuff is kept private just to keep api simple -int SetPortFeature(int device, int feature, int index); -int ClearPortFeature(int device, int feature, int index); -int SetPortPower(int device, int port); -int SetPortReset(int device, int port); -int GetPortStatus(int device, int port, u32* status); - -//=================================================================== -//=================================================================== -// Hardware defines - -// HcControl -#define PeriodicListEnable 0x00000004 -#define IsochronousEnable 0x00000008 -#define ControlListEnable 0x00000010 -#define BulkListEnable 0x00000020 -#define OperationalMask 0x00000080 -#define HostControllerFunctionalState 0x000000C0 - -// HcCommandStatus -#define HostControllerReset 0x00000001 -#define ControlListFilled 0x00000002 -#define BulkListFilled 0x00000004 - -// HcInterruptStatus Register -#define WritebackDoneHead 0x00000002 -#define StartofFrame 0x00000004 -#define ResumeDetected 0x00000008 -#define UnrecoverableError 0x00000010 -#define FrameNumberOverflow 0x00000020 -#define RootHubStatusChange 0x00000040 -#define OwnershipChange 0x00000080 -#define MasterInterruptEnable 0x80000000 - -// HcRhStatus -#define SetGlobalPower 0x00010000 -#define DeviceRemoteWakeupEnable 0x00008000 - -// HcRhPortStatus (hub 0, port 1) -#define CurrentConnectStatus 0x00000001 -#define PortEnableStatus 0x00000002 -#define PortSuspendStatus 0x00000004 -#define PortOverCurrentIndicator 0x00000008 -#define PortResetStatus 0x00000010 - -#define PortPowerStatus 0x00000100 -#define LowspeedDevice 0x00000200 -#define HighspeedDevice 0x00000400 - -#define ConnectStatusChange (CurrentConnectStatus << 16) -#define PortResetStatusChange (PortResetStatus << 16) - - -#define TD_ROUNDING (u32)0x00040000 -#define TD_SETUP (u32)0x00000000 -#define TD_IN (u32)0x00100000 -#define TD_OUT (u32)0x00080000 -#define TD_DELAY_INT(x) (u32)((x) << 21) -#define TD_TOGGLE_0 (u32)0x02000000 -#define TD_TOGGLE_1 (u32)0x03000000 -#define TD_CC (u32)0xF0000000 - -// HostController EndPoint Descriptor -typedef struct { - volatile u32 Control; - volatile u32 TailTd; - volatile u32 HeadTd; - volatile u32 Next; -} HCED; - -// HostController Transfer Descriptor -typedef struct { - volatile u32 Control; - volatile u32 CurrBufPtr; - volatile u32 Next; - volatile u32 BufEnd; -} HCTD; - -// Host Controller Communication Area -typedef struct { - volatile u32 InterruptTable[32]; - volatile u16 FrameNumber; - volatile u16 FrameNumberPad; - volatile u32 DoneHead; - volatile u8 Reserved[120]; -} HCCA; - -//==================================================================================== -//==================================================================================== - -class HostController; -class Endpoint; -class Device; - -// must be 3*16 bytes long -class Endpoint -{ -public: - HCED EndpointDescriptor; // Pointer to EndpointDescriptor == Pointer to Endpoint - HCTD TDHead; - - enum State - { - Free, - NotQueued, - Idle, - SetupQueued, - DataQueued, - StatusQueued, - CallbackPending - }; - - volatile u8 CurrentState; - u8 Flags; // 0x80 In, 0x03 mask endpoint type - - u16 Length; - u8* Data; - USBCallback Callback; // Must be a multiple of 16 bytes long - void* UserData; - - int Address() - { - int ep = (EndpointDescriptor.Control >> 7) & 0xF; - if (ep) - ep |= Flags & 0x80; - return ep; - } - - int Device() - { - return EndpointDescriptor.Control & 0x7F; - } - - int Status() - { - return (TDHead.Control >> 28) & 0xF; - } - - u32 Enqueue(u32 head) - { - if (CurrentState == NotQueued) - { - EndpointDescriptor.Next = head; - head = (u32)&EndpointDescriptor; - CurrentState = Idle; - } - return head; - } -}; - -class Device -{ -public: - u8 _endpointMap[MAX_ENDPOINTS_PER_DEVICE*2]; - u8 Hub; - u8 Port; - u8 Addr; - u8 Pad; - - // Only if this device is a hub - u8 HubPortCount; // nonzero if this is a hub - u8 HubInterruptData; - u8 HubMap; - u8 HubMask; - - int Flags; // 1 = Disconnected - - Setup SetupBuffer; - - // Allocate endpoint zero - int Init(DeviceDescriptor* d, int hub, int port, int addr, int lowSpeed) - { - Hub = hub; - Port = port; - Addr = addr; - Flags = lowSpeed; - memset(_endpointMap,0xFF,sizeof(_endpointMap)); - return 0; - } - - int SetEndpointIndex(int ep, int endpointIndex) - { - for (int i = 0; i < MAX_ENDPOINTS_PER_DEVICE*2; i += 2) - { - if (_endpointMap[i] == 0xFF) // Add endpoint to map - { - _endpointMap[i] = ep; - _endpointMap[i+1] = endpointIndex; - return 0; - } - } - return ERR_ENDPOINT_NONE_LEFT; - } - - int GetEndpointIndex(int ep) - { - for (int i = 0; i < MAX_ENDPOINTS_PER_DEVICE*2; i += 2) - { - if (_endpointMap[i] == ep) - return _endpointMap[i+1]; - if (_endpointMap[i] == 0xFF) - break; - } - return -1; - } -}; - -class HostController -{ -public: - HCCA CommunicationArea; - Endpoint Endpoints[MAX_ENDPOINTS_TOTAL]; // Multiple of 16 - - Endpoint EndpointZero; // For device enumeration - HCTD _commonTail; - Setup _setupZero; - - Device Devices[MAX_DEVICES]; - u32 _frameNumber; // 32 bit ms counter - - u8 _callbacksPending; // Endpoints with callbacks are pending, set from ISR via ProcessDoneQueue - u8 _rootHubStatusChange; // Root hub status has changed, set from ISR - u8 _unused0; - u8 _unused1; - - u8 _connectPending; // Reset has initiated a connect - u8 _connectCountdown; // Number of ms left after reset before we can connect - u8 _connectHub; // Will connect on this hub - u8 _connectPort; // ... and this port - - u8 SRAM[0]; // Start of free SRAM - - void Loop() - { - u16 elapsed = CommunicationArea.FrameNumber - (u16)_frameNumber; // extend to 32 bits - _frameNumber += elapsed; - - // Do callbacks, if any - while (_callbacksPending) - { - for (int i = 0; i < MAX_ENDPOINTS_TOTAL; i++) - { - Endpoint* endpoint = Endpoints + i; - if (endpoint->CurrentState == Endpoint::CallbackPending) - { - _callbacksPending--; - endpoint->CurrentState = Endpoint::Idle; - endpoint->Callback(endpoint->Device(),endpoint->Address(),endpoint->Status(),endpoint->Data,endpoint->Length,endpoint->UserData); - } - } - } - - // Deal with changes on the root hub - if (_rootHubStatusChange) - { - u32 status = LPC_USB->HcRhPortStatus1; - _rootHubStatusChange = 0; - if (status >> 16) - { - HubStatusChange(0,1,status); - LPC_USB->HcRhPortStatus1 = status & 0xFFFF0000; // clear status changes - } - } - - // Connect after reset timeout - if (_connectCountdown) - { - if (elapsed >= _connectCountdown) - { - _connectCountdown = 0; - Connect(_connectHub,_connectPort & 0x7F,_connectPort & 0x80); - } else - _connectCountdown -= elapsed; - } - } - - // HubInterrupt - bitmap in dev->HubInterruptData - void HubInterrupt(int device) - { - Device* dev = &Devices[device-1]; - for (int i = 0; i < dev->HubPortCount; i++) - { - int port = i+1; - if (dev->HubInterruptData & (1 << port)) - { - u32 status = 0; - GetPortStatus(device,port,&status); - if (status >> 16) - { - if (_connectPending && (status & ConnectStatusChange)) - continue; // Don't connect again until previous device has been added and addressed - - HubStatusChange(device,port,status); - if (status & ConnectStatusChange) - ClearPortFeature(device,C_PORT_CONNECTION,port); - if (status & PortResetStatusChange) - ClearPortFeature(device,C_PORT_RESET,port); - } - } - } - } - - static void HubInterruptCallback(int device, int endpoint, int status, u8* data, int len, void* userData) - { - HostController* controller = (HostController*)userData; - if (status == 0) - controller->HubInterrupt(device); - USBInterruptTransfer(device,endpoint,data,1,HubInterruptCallback,userData); - } - - int InitHub(int device) - { - u8 buf[16]; - int r= USBControlTransfer(device,DEVICE_TO_HOST | REQUEST_TYPE_CLASS | RECIPIENT_DEVICE,GET_DESCRIPTOR,(DESCRIPTOR_TYPE_HUB << 8),0,buf,sizeof(buf)); - if (r < 0) - return ERR_HUB_INIT_FAILED; - - // turn on power on the hubs ports - Device* dev = &Devices[device-1]; - int ports = buf[2]; - dev->HubPortCount = ports; - for (int i = 0; i < ports; i++) - SetPortPower(device,i+1); - - // Enable hub change interrupts - return USBInterruptTransfer(device,0x81,&dev->HubInterruptData,1,HubInterruptCallback,this); - } - - int AddEndpoint(int device, int ep, int attributes, int maxPacketSize, int interval) - { - LOG("AddEndpoint D:%02X A:%02X T:%02X P:%04X I:%02X\n",device,ep,attributes,maxPacketSize,interval); - Device* dev = &Devices[device-1]; - Endpoint* endpoint = AllocateEndpoint(device,ep,attributes,maxPacketSize); - if (!endpoint) - return ERR_ENDPOINT_NONE_LEFT; - dev->SetEndpointIndex(ep,endpoint - Endpoints); - endpoint->EndpointDescriptor.Control |= dev->Flags; // Map in slow speed - return 0; // TODO ed->bInterval - } - - int AddEndpoint(int device, EndpointDescriptor* ed) - { - return AddEndpoint(device,ed->bEndpointAddress,ed->bmAttributes,ed->wMaxPacketSize,ed->bInterval); - } - - // allocate a endpoint - Endpoint* AllocateEndpoint(int device, int endpointAddress, int type, int maxPacketSize) - { - for (int i = 0; i < MAX_ENDPOINTS_TOTAL; i++) - { - Endpoint* ep = &Endpoints[i]; - if (ep->CurrentState == 0) - { - //LOG("Allocated endpoint %d to %02X:%02X\n",i,device,endpointAddress); - ep->Flags = (endpointAddress & 0x80) | (type & 3); - ep->CurrentState = Endpoint::NotQueued; - ep->EndpointDescriptor.Control = (maxPacketSize << 16) | ((endpointAddress & 0x7F) << 7) | device; - return ep; - } - } - return 0; - } - - Endpoint* GetEndpoint(int device, int ep) - { - if (device == 0) - { - //printf("WARNING: USING DEVICE 0\n"); - return &EndpointZero; - } - if (device > MAX_DEVICES) - return 0; - int i = Devices[device-1].GetEndpointIndex(ep); - if (i == -1) - return 0; - return Endpoints + i; - } - - int Transfer(Endpoint* endpoint, int token, u8* data, int len, int state) - { - //LOG("Transfer %02X T:%d Len:%d S:%d\n",endpoint->Address(),token,len,state); - - int toggle = 0; - if (endpoint->Address() == 0) - toggle = (token == TOKEN_SETUP) ? TD_TOGGLE_0 : TD_TOGGLE_1; - - if (token != TOKEN_SETUP) - token = (token == TOKEN_IN ? TD_IN : TD_OUT); - - HCTD* head = &endpoint->TDHead; - HCTD* tail = &_commonTail; - - head->Control = TD_ROUNDING | token | TD_DELAY_INT(0) | toggle | TD_CC; - head->CurrBufPtr = (u32)data; - head->BufEnd = (u32)(data + len - 1); - head->Next = (u32)tail; - - HCED* ed = &endpoint->EndpointDescriptor; - ed->HeadTd = (u32)head | (ed->HeadTd & 0x00000002); // carry toggle - ed->TailTd = (u32)tail; - - //HCTD* td = head; - //LOG("%04X TD %08X %08X %08X Next:%08X\n",CommunicationArea.FrameNumber,td->Control,td->CurrBufPtr,td->BufEnd,td->Next); - //LOG("%04X ED %08X %08X %08X\n",CommunicationArea.FrameNumber,ed->Control,ed->HeadTd,ed->TailTd); - - switch (endpoint->Flags & 3) - { - case ENDPOINT_CONTROL: - LPC_USB->HcControlHeadED = endpoint->Enqueue(LPC_USB->HcControlHeadED); // May change state NotQueued->Idle - endpoint->CurrentState = state; // Get in before an int - LPC_USB->HcCommandStatus = LPC_USB->HcCommandStatus | ControlListFilled; - LPC_USB->HcControl = LPC_USB->HcControl | ControlListEnable; - break; - - case ENDPOINT_BULK: - LPC_USB->HcBulkHeadED = endpoint->Enqueue(LPC_USB->HcBulkHeadED); - endpoint->CurrentState = state; - LPC_USB->HcCommandStatus = LPC_USB->HcCommandStatus | BulkListFilled; - LPC_USB->HcControl = LPC_USB->HcControl | BulkListEnable; - break; - - case ENDPOINT_INTERRUPT: - CommunicationArea.InterruptTable[0] = endpoint->Enqueue(CommunicationArea.InterruptTable[0]); - endpoint->CurrentState = state; - LPC_USB->HcControl |= PeriodicListEnable; - break; - } - return 0; - } - - // Remove an endpoint from an active queue - bool Remove(HCED* ed, volatile HCED** queue) - { - if (*queue == 0) - return false; - if (*queue == (volatile HCED*)ed) - { - *queue = (volatile HCED*)ed->Next; // At head of queue - return true; - } - - volatile HCED* head = *queue; - while (head) - { - if (head->Next == (u32)ed) - { - head->Next = ed->Next; - return true; - } - head = (volatile HCED*)head->Next; - } - return false; - } - - void Release(Endpoint* endpoint) - { - if (endpoint->CurrentState == Endpoint::NotQueued) - { - // Never event used it, nothing to do - } - else - { - HCED* ed = (HCED*)endpoint; - ed->Control |= 0x4000; // SKIP - switch (endpoint->Flags & 0x03) - { - case ENDPOINT_CONTROL: - Remove(ed,(volatile HCED**)&LPC_USB->HcControlHeadED); - break; - case ENDPOINT_BULK: - Remove(ed,(volatile HCED**)&LPC_USB->HcBulkHeadED); - break; - case ENDPOINT_INTERRUPT: - for (int i = 0; i < 32; i++) - Remove(ed,(volatile HCED**)&CommunicationArea.InterruptTable[i]); - break; - } - - u16 fn = CommunicationArea.FrameNumber; - while (fn == CommunicationArea.FrameNumber) - ; // Wait for next frame - - } - - // In theory, the endpoint is now dead. - // TODO: Will Callbacks ever be pending? BUGBUG - memset(endpoint,0,sizeof(Endpoint)); - } - - // Pop the last TD from the list - HCTD* Reverse(HCTD* current) - { - HCTD *result = NULL,*temp; - while (current) - { - temp = (HCTD*)current->Next; - current->Next = (u32)result; - result = current; - current = temp; - } - return result; - } - - // Called from interrupt... - // Control endpoints use a state machine to progress through the transfers - void ProcessDoneQueue(u32 tdList) - { - HCTD* list = Reverse((HCTD*)tdList); - while (list) - { - Endpoint* endpoint = (Endpoint*)(list-1); - list = (HCTD*)list->Next; - int ep = endpoint->Address(); - bool in = endpoint->Flags & 0x80; - int status = (endpoint->TDHead.Control >> 28) & 0xF; - - //LOG("ProcessDoneQueue %02X %08X\n",ep,endpoint->TDHead.Control); - - if (status != 0) - { - LOG("ProcessDoneQueue status %02X %d\n",ep,status); - endpoint->CurrentState = Endpoint::Idle; - } else { - switch (endpoint->CurrentState) - { - case Endpoint::SetupQueued: - if (endpoint->Length == 0) - Transfer(endpoint,in ? TOKEN_OUT : TOKEN_IN,0,0,Endpoint::StatusQueued); // Skip Data Phase - else - Transfer(endpoint,in ? TOKEN_IN : TOKEN_OUT,endpoint->Data,endpoint->Length, Endpoint::DataQueued); // Setup is done, now Data - break; - - case Endpoint::DataQueued: - if (endpoint->TDHead.CurrBufPtr) - endpoint->Length = endpoint->TDHead.CurrBufPtr - (u32)endpoint->Data; - - if (ep == 0) - Transfer(endpoint,in ? TOKEN_OUT : TOKEN_IN,0,0,Endpoint::StatusQueued); // Data is done, now Status, Control only - else - endpoint->CurrentState = Endpoint::Idle; - break; - - case Endpoint::StatusQueued: // Transaction is done - endpoint->CurrentState = Endpoint::Idle; - break; - } - } - - // Complete, flag if we need a callback - if (endpoint->Callback && endpoint->CurrentState == Endpoint::Idle) - { - endpoint->CurrentState = Endpoint::CallbackPending; - _callbacksPending++; - } - } - } - - // Hack to reset devices that don't want to connect - int AddDevice(int hub, int port, bool isLowSpeed) - { - int device = AddDeviceCore(hub,port,isLowSpeed); - if (device < 0) - { - LOG("========RETRY ADD DEVICE========\n"); // This will go for ever.. TODO power cycle root? - Disconnect(hub,port); // Could not read descriptor at assigned address, reset this port and try again - ResetPort(hub,port); // Cheap bluetooth dongles often need this on a hotplug - return -1; - } - return device; - } - - int AddDeviceCore(int hub, int port, bool isLowSpeed) - { - int lowSpeed = isLowSpeed ? 0x2000 : 0; - DeviceDescriptor desc; - EndpointZero.EndpointDescriptor.Control = (8 << 16) | lowSpeed; // MaxPacketSize == 8 - int r = GetDescriptor(0,DESCRIPTOR_TYPE_DEVICE,0,(u8*)&desc,8); - if (r < 0) - { - LOG("FAILED TO LOAD DESCRIPTOR FOR DEVICE 0\n"); - return r; - } - - EndpointZero.EndpointDescriptor.Control = (desc.bMaxPacketSize << 16) | lowSpeed; // Actual MaxPacketSize - r = GetDescriptor(0,DESCRIPTOR_TYPE_DEVICE,0,(u8*)&desc,sizeof(desc)); - if (r < 0) - return r; - - LOG("\nClass %02X found %04X:%04X\n\n",desc.bDeviceClass,desc.idVendor,desc.idProduct); - - // Now assign the device an address, move off EndpointZero - int device = 0; - for (int i = 0; i < MAX_DEVICES; i++) - { - if (Devices[i].Port == 0) - { - device = i+1; - break; - } - } - if (!device) - return ERR_DEVICE_NONE_LEFT; - - r = SetAddress(0,device); - if (r) - return r; - DelayMS(2); - - // Now at a nonzero address, create control endpoint - Device* dev = &Devices[device-1]; - dev->Init(&desc,hub,port,device,lowSpeed); - AddEndpoint(device,0,ENDPOINT_CONTROL,desc.bMaxPacketSize,0); - _connectPending = 0; - - // Verify this all works - r = GetDescriptor(device,DESCRIPTOR_TYPE_DEVICE,0,(u8*)&desc,sizeof(desc)); - if (r < 0) - return r; - - // Set to interface 0 by default - // Calls LoadDevice if interface is found - r = SetConfigurationAndInterface(device,1,0,&desc); - - if (desc.bDeviceClass == CLASS_HUB) - InitHub(device); // Handle hubs in this code - - return device; - } - - // Walk descriptors and create endpoints for a given device - // TODO configuration !=1, alternate settings etc. - int SetConfigurationAndInterface(int device, int configuration, int interfaceNumber, DeviceDescriptor* desc) - { - u8 buffer[255]; - int err = GetDescriptor(device,DESCRIPTOR_TYPE_CONFIGURATION,0,buffer,sizeof(buffer)); - if (err < 0) - return err; - - err = SetConfiguration(device,configuration); - if (err < 0) - return err; - - // Add the endpoints for this interface - int len = buffer[2] | (buffer[3] << 8); - u8* d = buffer; - u8* end = d + len; - InterfaceDescriptor* found = 0; - while (d < end) - { - if (d[1] == DESCRIPTOR_TYPE_INTERFACE) - { - InterfaceDescriptor* id = (InterfaceDescriptor*)d; - if (id->bInterfaceNumber == interfaceNumber) - { - found = id; - d += d[0]; - while (d < end && d[1] != DESCRIPTOR_TYPE_INTERFACE) - { - switch (d[1]) - { - case DESCRIPTOR_TYPE_ENDPOINT: - AddEndpoint(device,(EndpointDescriptor*)d); - break; - default: - LOG("Skipping descriptor %02X (%d bytes)\n",d[1],d[0]); - } - d += d[0]; - } - } - } - d += d[0]; - } - - if (!found) - return ERR_INTERFACE_NOT_FOUND; - OnLoadDevice(device,desc,found); - return 0; - } - - void Init() - { - LOG("USB INIT (Controller is %d bytes)\n",sizeof(*this)); - memset(this,0,sizeof(HostController)); - EndpointZero.CurrentState = Endpoint::NotQueued; - HWInit(&CommunicationArea); - DelayMS(10); - } - - void ResetPort(int hub, int port) - { - LOG("ResetPort Hub:%d Port:%d\n",hub,port); - _connectPending++; // Only reset/add 1 device at a time - if (hub == 0) - LPC_USB->HcRhPortStatus1 = PortResetStatus; // Reset Root Hub, port 1 - else - SetPortReset(hub,port); // or reset other hub - } - - void Disconnect(int hub, int port) - { - LOG("Disconnect Hub:%d Port:%d\n",hub,port); // Mark a device for destruction - for (int i = 0; i < MAX_DEVICES; i++) - { - Device* dev = Devices + i; - if (dev->Port == port && dev->Hub == hub) - { - // Disconnect everything that is attached to this device if it is a hub - for (int p = 0; p < dev->HubPortCount; p++) - Disconnect(i+1,p+1); - - // Now release endpoints - for (int j = 1; j < MAX_ENDPOINTS_PER_DEVICE*2; j += 2) - { - u8 endpointIndex = dev->_endpointMap[j]; - if (endpointIndex != 0xFF) - Release(Endpoints + endpointIndex); - } - dev->Port = 0; // Device is now free - dev->Flags = 0; - return; - } - } - } - - // called after reset - void Connect(int hub, int port, bool lowspeed) - { - LOG("Connect Hub:%d Port:%d %s\n",hub,port,lowspeed ? "slow" : "full"); - AddDevice(hub,port,lowspeed); - } - - // Called from interrupt - void HubStatusChange(int hub, int port, u32 status) - { - LOG("HubStatusChange Hub:%d Port:%d %08X\n",hub,port,status); - if (status & ConnectStatusChange) - { - if (status & CurrentConnectStatus) // Connecting - ResetPort(hub,port); // Reset to initiate connect (state machine?) - else - Disconnect(hub,port); - } - - if (status & PortResetStatusChange) - { - if (!(status & PortResetStatus)) - { - _connectCountdown = 200; // Schedule a connection in 200ms - if (status & LowspeedDevice) - port |= 0x80; - _connectHub = hub; - _connectPort = port; - } - } - } - - #define HOST_CLK_EN (1<<0) - #define PORTSEL_CLK_EN (1<<3) - #define AHB_CLK_EN (1<<4) - #define CLOCK_MASK (HOST_CLK_EN | PORTSEL_CLK_EN | AHB_CLK_EN) - - #define FRAMEINTERVAL (12000-1) // 1ms - #define DEFAULT_FMINTERVAL ((((6 * (FRAMEINTERVAL - 210)) / 7) << 16) | FRAMEINTERVAL) - - void DelayMS(int ms) - { - u16 f = ms + CommunicationArea.FrameNumber; - while (f != CommunicationArea.FrameNumber) - ; - } - - static void HWInit(HCCA* cca) - { - NVIC_DisableIRQ(USB_IRQn); - - // turn on power for USB - LPC_SC->PCONP |= (1UL<<31); - // Enable USB host clock, port selection and AHB clock - LPC_USB->USBClkCtrl |= CLOCK_MASK; - // Wait for clocks to become available - while ((LPC_USB->USBClkSt & CLOCK_MASK) != CLOCK_MASK) - ; - - // We are a Host - LPC_USB->OTGStCtrl |= 1; - LPC_USB->USBClkCtrl &= ~PORTSEL_CLK_EN; // we don't need port selection clock until we do OTG - - // configure USB pins - LPC_PINCON->PINSEL1 &= ~((3<<26)|(3<<28)); - LPC_PINCON->PINSEL1 |= ((1<<26)|(1<<28)); // USB D+/D- - - LPC_PINCON->PINSEL3 &= ~((3 << 6) | (3 << 22)); // USB_PPWR, USB_OVRCR - LPC_PINCON->PINSEL3 |= ((2 << 6) | (2 << 22)); - - LPC_PINCON->PINSEL4 &= ~(3 << 18); // USB_CONNECT - LPC_PINCON->PINSEL4 |= (1 << 18); - - // Reset OHCI block - LPC_USB->HcControl = 0; - LPC_USB->HcControlHeadED = 0; - LPC_USB->HcBulkHeadED = 0; - - LPC_USB->HcCommandStatus = HostControllerReset; - LPC_USB->HcFmInterval = DEFAULT_FMINTERVAL; - LPC_USB->HcPeriodicStart = FRAMEINTERVAL*90/100; - - LPC_USB->HcControl = (LPC_USB->HcControl & (~HostControllerFunctionalState)) | OperationalMask; - LPC_USB->HcRhStatus = SetGlobalPower; - - LPC_USB->HcHCCA = (u32)cca; - LPC_USB->HcInterruptStatus |= LPC_USB->HcInterruptStatus; - LPC_USB->HcInterruptEnable = MasterInterruptEnable | WritebackDoneHead | RootHubStatusChange | FrameNumberOverflow; - - NVIC_SetPriority(USB_IRQn, 0); - NVIC_EnableIRQ(USB_IRQn); - while (cca->FrameNumber < 10) - ; // 10ms delay before diving in - } -}; - -//==================================================================================== -//==================================================================================== -// Host controller instance and Interrupt handler - -static HostController _controller __attribute__((at(USB_RAM_BASE))); - -extern "C" void USB_IRQHandler(void) __irq; -void USB_IRQHandler (void) __irq -{ - u32 int_status = LPC_USB->HcInterruptStatus; - - if (int_status & RootHubStatusChange) // Root hub status change - _controller._rootHubStatusChange++; // Just flag the controller, will be processed in USBLoop - - u32 head = 0; - if (int_status & WritebackDoneHead) - { - head = _controller.CommunicationArea.DoneHead; // Writeback Done - _controller.CommunicationArea.DoneHead = 0; - } - LPC_USB->HcInterruptStatus = int_status; - - if (head) - _controller.ProcessDoneQueue(head); // TODO - low bit can be set BUGBUG -} - -//==================================================================================== -//==================================================================================== -// API Methods - -void USBInit() -{ - return _controller.Init(); -} - -void USBLoop() -{ - return _controller.Loop(); -} - -u8* USBGetBuffer(u32* len) -{ - *len = USB_RAM_SIZE - sizeof(HostController); - return _controller.SRAM; -} - -static Setup* GetSetup(int device) -{ - if (device == 0) - return &_controller._setupZero; - - if (device < 1 || device > MAX_DEVICES) - return 0; - return &_controller.Devices[device-1].SetupBuffer; -} - -// Loop until IO on endpoint is complete -static int WaitIODone(Endpoint* endpoint) -{ - if (endpoint->CurrentState == Endpoint::NotQueued) - return 0; - while (endpoint->CurrentState != Endpoint::Idle) - USBLoop(); // May generate callbacks, mount or unmount devices etc - int status = endpoint->Status(); - if (status == 0) - return endpoint->Length; - return -status; -} - -int USBTransfer(int device, int ep, u8 flags, u8* data, int length, USBCallback callback, void* userData) -{ - Endpoint* endpoint = _controller.GetEndpoint(device,ep); - if (!endpoint) - return ERR_ENDPOINT_NOT_FOUND; - - WaitIODone(endpoint); - endpoint->Flags = flags; - endpoint->Data = data; - endpoint->Length = length; - endpoint->Callback = callback; - endpoint->UserData = userData; - if (ep == 0) - _controller.Transfer(endpoint,TOKEN_SETUP,(u8*)GetSetup(device),8,Endpoint::SetupQueued); - else - _controller.Transfer(endpoint,flags & 0x80 ? TOKEN_IN : TOKEN_OUT,data,length,Endpoint::DataQueued); - if (callback) - return IO_PENDING; - return WaitIODone(endpoint); -} - -int USBControlTransfer(int device, int request_type, int request, int value, int index, u8* data, int length, USBCallback callback, void * userData) -{ - Setup* setup = GetSetup(device); - if (!setup) - return ERR_DEVICE_NOT_FOUND; - - // Async control calls may overwrite setup buffer of previous call, so we need to wait before setting up next call - WaitIODone(_controller.GetEndpoint(device,0)); - - setup->bm_request_type = request_type; - setup->b_request = request; - setup->w_value = value; - setup->w_index = index; - setup->w_length = length; - return USBTransfer(device,0,request_type & DEVICE_TO_HOST,data,length,callback,userData); -} - -int USBInterruptTransfer(int device, int ep, u8* data, int length, USBCallback callback, void* userData) -{ - return USBTransfer(device,ep,(ep & 0x80) | ENDPOINT_INTERRUPT,data,length,callback,userData); -} - -int USBBulkTransfer(int device, int ep, u8* data, int length, USBCallback callback, void* userData) -{ - return USBTransfer(device,ep,(ep & 0x80) | ENDPOINT_BULK,data,length,callback,userData); -} - -int GetDescriptor(int device, int descType,int descIndex, u8* data, int length) -{ - return USBControlTransfer(device,DEVICE_TO_HOST | RECIPIENT_DEVICE, GET_DESCRIPTOR,(descType << 8)|(descIndex), 0, data, length, 0); -} - -int GetString(int device, int index, char* dst, int length) -{ - u8 buffer[255]; - int le = GetDescriptor(device,DESCRIPTOR_TYPE_STRING,index,buffer,sizeof(buffer)); - if (le < 0) - return le; - if (length < 1) - return -1; - length <<= 1; - if (le > length) - le = length; - for (int j = 2; j < le; j += 2) - *dst++ = buffer[j]; - *dst = 0; - return (le>>1)-1; -} - -int SetAddress(int device, int new_addr) -{ - return USBControlTransfer(device,HOST_TO_DEVICE | RECIPIENT_DEVICE, SET_ADDRESS, new_addr, 0, 0, 0, 0); -} - -int SetConfiguration(int device, int configNum) -{ - return USBControlTransfer(device,HOST_TO_DEVICE | RECIPIENT_DEVICE, SET_CONFIGURATION, configNum, 0, 0, 0, 0); -} - -int SetInterface(int device, int ifNum, int altNum) -{ - return USBControlTransfer(device,HOST_TO_DEVICE | RECIPIENT_INTERFACE, SET_INTERFACE, altNum, ifNum, 0, 0, 0); -} - -// HUB stuff -int SetPortFeature(int device, int feature, int index) -{ - return USBControlTransfer(device,HOST_TO_DEVICE | REQUEST_TYPE_CLASS | RECIPIENT_OTHER,SET_FEATURE,feature,index,0,0); -} - -int ClearPortFeature(int device, int feature, int index) -{ - return USBControlTransfer(device,HOST_TO_DEVICE | REQUEST_TYPE_CLASS | RECIPIENT_OTHER,CLEAR_FEATURE,feature,index,0,0); -} - -int SetPortPower(int device, int port) -{ - int r = SetPortFeature(device,PORT_POWER,port); - _controller.DelayMS(20); // 80ms to turn on a hubs power... DESCRIPTOR? todo - return r; -} - -int SetPortReset(int device, int port) -{ - return SetPortFeature(device,PORT_RESET,port); -} - -int GetPortStatus(int device, int port, u32* status) -{ - return USBControlTransfer(device,DEVICE_TO_HOST | REQUEST_TYPE_CLASS | RECIPIENT_OTHER,GET_STATUS,0,port,(u8*)status,4); -} \ No newline at end of file