File content as of revision 0:e939856c1939:
/*
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()
{
// printf("Enter Loop \r\n");
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;
LOG("CurrentState Change Idle endpoint(%d) currentState =%d\r\n",endpoint->Address(),endpoint->CurrentState);
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;
}
// printf("Outer Loop \r\n");
}
// 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\r\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\r\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)
{
//Makoto edit comment out
// LOG("Transfer start\r\n");
LOG("Transfer ep=%02X Token:%d Len:%d State:%d\r\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\r\n",CommunicationArea.FrameNumber,td->Control,td->CurrBufPtr,td->BufEnd,td->Next);
//LOG("%04X ED %08X %08X %08X\r\n",CommunicationArea.FrameNumber,ed->Control,ed->HeadTd,ed->TailTd);
//LOG("Transfer run01\r\n");
switch (endpoint->Flags & 3)
{
case ENDPOINT_CONTROL:
LOG("Transfer run ENDPOINT_CONTROL\r\n");
LPC_USB->HcControlHeadED = endpoint->Enqueue(LPC_USB->HcControlHeadED); // May change state NotQueued->Idle
//LOG("Transfer run02\r\n");
LOG("endpoint->CurrentState change %d->%d\r\n",endpoint->CurrentState,state);
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:
LOG("Transfer run ENDPOINT_BULK\r\n");
LPC_USB->HcBulkHeadED = endpoint->Enqueue(LPC_USB->HcBulkHeadED);
LOG("endpoint->CurrentState change %d->%d\r\n",endpoint->CurrentState,state);
endpoint->CurrentState = state;
LPC_USB->HcCommandStatus = LPC_USB->HcCommandStatus | BulkListFilled;
LPC_USB->HcControl = LPC_USB->HcControl | BulkListEnable;
break;
case ENDPOINT_INTERRUPT:
LOG("Transfer run ENDPOINT_INTERRUPT\r\n");
CommunicationArea.InterruptTable[0] = endpoint->Enqueue(CommunicationArea.InterruptTable[0]);
LOG("endpoint->CurrentState change %d->%d\r\n",endpoint->CurrentState,state);
endpoint->CurrentState = state;
LPC_USB->HcControl |= PeriodicListEnable;
break;
}
LOG("Transfer end\r\n");
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)
{
LOG("<<ProcessDoneQueue enter>>\r\n");
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\r\n",ep,endpoint->TDHead.Control);
if (status != 0)
{
LOG("ProcessDoneQueue status %02X %d\r\n",ep,status);
LOG("CurrentState Change Idle endpoint(%d) currentState =%d\r\n",endpoint->Address(),endpoint->CurrentState);
endpoint->CurrentState = Endpoint::Idle;
} else {
switch (endpoint->CurrentState)
{
case Endpoint::SetupQueued:
if (endpoint->Length == 0)
{
LOG("ProcessDoneQueue endpoint->Length == 0 endpoint->CurrentState=%d\r\n",endpoint->CurrentState);
Transfer(endpoint,in ? TOKEN_OUT : TOKEN_IN,0,0,Endpoint::StatusQueued); // Skip Data Phase
}
else
{
LOG("ProcessDoneQueue endpoint->Length != 0 endpoint->CurrentState=%d\r\n",endpoint->CurrentState);
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)
{
LOG("ProcessDoneQueue ep == 0 endpoint->CurrentState=%d\r\n",endpoint->CurrentState);
Transfer(endpoint,in ? TOKEN_OUT : TOKEN_IN,0,0,Endpoint::StatusQueued); // Data is done, now Status, Control only
}
else
{
LOG("ProcessDoneQueue ep != 0 endpoint->CurrentState=%d\r\n",endpoint->CurrentState);
endpoint->CurrentState = Endpoint::Idle;
LOG("CurrentState Change Idle endpoint(%d) currentState =%d\r\n",endpoint->Address(),endpoint->CurrentState);
}
break;
case Endpoint::StatusQueued: // Transaction is done
LOG("CurrentState Change Idle endpoint(%d) currentState =%d\r\n",endpoint->Address(),endpoint->CurrentState);
endpoint->CurrentState = Endpoint::Idle;
break;
}
}
// Complete, flag if we need a callback
if (endpoint->Callback && endpoint->CurrentState == Endpoint::Idle)
{
endpoint->CurrentState = Endpoint::CallbackPending;
_callbacksPending++;
}
}
LOG("<<ProcessDoneQueue out>>\r\n");
}
// 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========\r\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\r\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\r\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)\r\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)\r\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\r\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\r\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\r\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\r\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
{
LOG("USB_IRQHandler start \r\n");
u32 int_status = LPC_USB->HcInterruptStatus;
LOG("USB_IRQHandler int_status=%0x\r\n",int_status);
if(int_status & UnrecoverableError) //Error
{
LOG("USB_IRQHandler UnrecoverableError Please reset\r\n");
}
if(int_status & MasterInterruptEnable)
{
LOG("USB_IRQHandler MasterInterruptEnable\r\n");
}
if(int_status &OwnershipChange)
{
LOG("USB_IRQHandler OwnershipChange\r\n");
}
if(int_status &FrameNumberOverflow)
{
LOG("USB_IRQHandler FrameNumberOverflow\r\n");
}
if(int_status&ResumeDetected)
{
LOG("USB_IRQHandler ResumeDetected\r\n");
}
if(int_status&StartofFrame)
{
LOG("USB_IRQHandler StartofFrame\r\n");
}
if (int_status & RootHubStatusChange) // Root hub status change
{
LOG("USB_IRQHandler _rootHubStatusChange %0x->%0x \r\n", _controller._rootHubStatusChange, _controller._rootHubStatusChange+1);
_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;
LOG("USB_IRQHandler head=%0x\r\n",head);
}
LPC_USB->HcInterruptStatus = int_status;
if (head)
_controller.ProcessDoneQueue(head); // TODO - low bit can be set BUGBUG
LOG("USB_IRQHandler end \r\n");
}
//====================================================================================
//====================================================================================
// 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)
{
LOG("WaitIODone start\r\n");
if (endpoint->CurrentState == Endpoint::NotQueued)
return 0;
while (endpoint->CurrentState != Endpoint::Idle)
{
LOG("WaitIODone goto USBloop endpoint->CurrentState =%d \r\n",endpoint->CurrentState);
USBLoop(); // May generate callbacks, mount or unmount devices etc
}
int status = endpoint->Status();
LOG("WaitIODone end\r\n");
if (status == 0)
return endpoint->Length;
return -status;
}
int USBTransfer(int device, int ep, u8 flags, u8* data, int length, USBCallback callback, void* userData)
{
//LOG("USBTRANSFER start\r\n");
Endpoint* endpoint = _controller.GetEndpoint(device,ep);
if (!endpoint)
{
LOG("USBTRANSFER error Endpoint not found!!\r\n");
return ERR_ENDPOINT_NOT_FOUND;
}
//LOG("USBTRANSFER run01\r\n");
WaitIODone(endpoint);
endpoint->Flags = flags;
endpoint->Data = data;
endpoint->Length = length;
endpoint->Callback = callback;
endpoint->UserData = userData;
//LOG("USBTRANSFER run02\r\n");
if (ep == 0)
{
LOG("USBTRANSFER ep == 0(Setup) ------------------------------\r\n");
_controller.Transfer(endpoint,TOKEN_SETUP,(u8*)GetSetup(device),8,Endpoint::SetupQueued);
}
else
{
LOG("USBTRANSFER ep != 0\r\n");
_controller.Transfer(endpoint,flags & 0x80 ? TOKEN_IN : TOKEN_OUT,data,length,Endpoint::DataQueued);
}
if (callback)
{
LOG("USBTRANSFER end io_pending\r\n");
return IO_PENDING;
}
LOG("USBTRANSFER end wait io done \r\n");
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;
LOG("USBControlTransfer(device=%d,reqtype=%d,req=%d,value=%d,index=%d,data=%p,len=%d,callbak=%p,udata=%p)\r\n",
device,request_type,request,value,index,data,length,callback,userData);
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);
}
makoto abe