#include <usb_host.h>
#include "ehci.h"
#include <drv_pci.h>
+#include <limits.h>
// === CONSTANTS ===
#define EHCI_MAX_CONTROLLERS 4
void EHCI_InterruptHandler(int IRQ, void *Ptr);
// -- API ---
void *EHCI_InitInterrupt(void *Ptr, int Endpoint, int bInput, int Period, tUSBHostCb Cb, void *CbData, void *Buf, size_t Length);
-void *EHCI_InitIsoch (void *Ptr, int Endpoint);
-void *EHCI_InitControl(void *Ptr, int Endpoint);
-void *EHCI_InitBulk (void *Ptr, int Endpoint);
+void *EHCI_InitIsoch (void *Ptr, int Endpoint, size_t MaxPacketSize);
+void *EHCI_InitControl(void *Ptr, int Endpoint, size_t MaxPacketSize);
+void *EHCI_InitBulk (void *Ptr, int Endpoint, size_t MaxPacketSize);
void EHCI_RemEndpoint(void *Ptr, void *Handle);
void *EHCI_SendControl(void *Ptr, void *Dest, tUSBHostCb Cb, void *CbData,
int isOutbound,
void *InData, size_t InLength
);
void *EHCI_SendBulk(void *Ptr, void *Dest, tUSBHostCb Cb, void *CbData, int Dir, void *Data, size_t Length);
+void EHCI_FreeOp(void *Ptr, void *Handle);
+// --- Internals ---
+tEHCI_qTD *EHCI_int_AllocateTD(tEHCI_Controller *Cont, int PID, void *Data, size_t Length, tUSBHostCb Cb, void *CbData);
+void EHCI_int_DeallocateTD(tEHCI_Controller *Cont, tEHCI_qTD *TD);
+void EHCI_int_AppendTD(tEHCI_QH *QH, tEHCI_qTD *TD);
+tEHCI_QH *EHCI_int_AllocateQH(tEHCI_Controller *Cont, int Endpoint, size_t MaxPacketSize);
+void EHCI_int_DeallocateQH(tEHCI_Controller *Cont, tEHCI_QH *QH);
// === GLOBALS ===
MODULE_DEFINE(0, VERSION, USB_EHCI, EHCI_Initialise, NULL, "USB_Core", NULL);
.SendIsoch = NULL,
.SendControl = EHCI_SendControl,
.SendBulk = EHCI_SendBulk,
- .FreeOp = NULL
+ .FreeOp = EHCI_FreeOp
};
// === CODE ===
// - Allocate periodic queue
cont->PeriodicQueue = (void*)MM_AllocDMA(1, 32, NULL);
// TODO: Error check
+ // > Populate queue
// -- Bind IRQ --
IRQ_AddHandler(InterruptNum, EHCI_InterruptHandler, cont);
// --------------------------------------------------------------------
// USB API
// --------------------------------------------------------------------
-void *EHCI_InitInterrupt(void *Ptr, int Endpoint, int bInput, int Period,
+void *EHCI_InitInterrupt(void *Ptr, int Endpoint, int bOutbound, int Period,
tUSBHostCb Cb, void *CbData, void *Buf, size_t Length)
{
+ tEHCI_Controller *Cont = Ptr;
+ int pow2period, period_pow;
+ if( Endpoint >= 256*16 )
+ return NULL;
+ if( Period <= 0 )
+ return NULL;
+ if( Period > 256 )
+ Period = 256;
+
+ // Round the period to the closest power of two
+ pow2period = 1;
+ period_pow = 0;
+ // - Find the first power above the period
+ while( pow2period < Period )
+ {
+ pow2period *= 2;
+ period_pow ++;
+ }
+ // - Check which is closest
+ if( Period - pow2period / 2 > pow2period - Period )
+ Period = pow2period;
+ else {
+ Period = pow2period/2;
+ period_pow --;
+ }
+
+ // Allocate a QH
+ tEHCI_QH *qh = EHCI_int_AllocateQH(Cont, Endpoint, Length);
+ qh->Impl.IntPeriodPow = period_pow;
+
+ // Choose an interrupt slot to use
+ int minslot = 0, minslot_load = INT_MAX;
+ for( int slot = 0; slot < Period; slot ++ )
+ {
+ int load = 0;
+ for( int i = 0; i < PERIODIC_SIZE; i += Period )
+ load += Cont->InterruptLoad[i+slot];
+ if( load == 0 ) break;
+ if( load < minslot_load ) {
+ minslot = slot;
+ minslot_load = load;
+ }
+ }
+ // Increase loading on the selected slot
+ for( int i = 0; i < PERIODIC_SIZE; i += Period )
+ Cont->InterruptLoad[i+minslot] += Length;
+ qh->Impl.IntOfs = minslot;
+
+ // Allocate TD for the data
+ tEHCI_qTD *td = EHCI_int_AllocateTD(Cont, (bOutbound ? PID_OUT : PID_IN), Buf, Length, Cb, CbData);
+ EHCI_int_AppendTD(qh, td);
+
+ // Insert into the periodic list
+
+ return qh;
}
-void *EHCI_InitIsoch(void *Ptr, int Endpoint)
+void *EHCI_InitIsoch(void *Ptr, int Endpoint, size_t MaxPacketSize)
{
- return NULL;
+ return (void*)(tVAddr)(Endpoint + 1);
}
-void *EHCI_InitControl(void *Ptr, int Endpoint)
+void *EHCI_InitControl(void *Ptr, int Endpoint, size_t MaxPacketSize)
{
- return NULL;
+ tEHCI_Controller *Cont = Ptr;
+
+ // Allocate a QH
+ tEHCI_QH *qh = EHCI_int_AllocateQH(Cont, Endpoint, MaxPacketSize);
+
+ // Append to async list
+ if( Cont->LastAsyncHead ) {
+ Cont->LastAsyncHead->HLink = MM_GetPhysAddr(qh)|2;
+ Cont->LastAsyncHead->Impl.Next = qh;
+ }
+ else
+ Cont->OpRegs->AsyncListAddr = MM_GetPhysAddr(qh)|2;
+ Cont->LastAsyncHead = qh;
+
+ return qh;
}
-void *EHCI_InitBulk(void *Ptr, int Endpoint)
+void *EHCI_InitBulk(void *Ptr, int Endpoint, size_t MaxPacketSize)
{
- return NULL;
+ return EHCI_InitControl(Ptr, Endpoint, MaxPacketSize);
}
-void EHCI_RemEndpoint(void *Ptr, void *Handle);
-void *EHCI_SendControl(void *Ptr, void *Dest, tUSBHostCb Cb, void *CbData,
+void EHCI_RemEndpoint(void *Ptr, void *Handle)
+{
+ if( Handle == NULL )
+ return ;
+ else if( (tVAddr)Handle <= 256*16 )
+ return ; // Isoch
+ else {
+ // Remove QH from list
+ // - If it's a polling endpoint, need to remove from all periodic lists
+
+ // Deallocate QH
+ EHCI_int_DeallocateQH(Ptr, Handle);
+ }
+}
+
+void *EHCI_SendControl(void *Ptr, void *Dest, tUSBHostCb Cb, void *CbData,
int isOutbound,
const void *SetupData, size_t SetupLength,
const void *OutData, size_t OutLength,
void *InData, size_t InLength
- );
-void *EHCI_SendBulk(void *Ptr, void *Dest, tUSBHostCb Cb, void *CbData, int Dir, void *Data, size_t Length);
+ )
+{
+ tEHCI_Controller *Cont = Ptr;
+ tEHCI_qTD *td_setup, *td_data, *td_status;
+
+ // Sanity checks
+ if( (tVAddr)Dest <= 256*16 )
+ return NULL;
+
+ // Check size of SETUP and status
+
+ // Allocate TDs
+ td_setup = EHCI_int_AllocateTD(Cont, PID_SETUP, (void*)SetupData, SetupLength, NULL, NULL);
+ if( isOutbound )
+ {
+ td_data = EHCI_int_AllocateTD(Cont, PID_OUT, (void*)OutData, OutLength, NULL, NULL);
+ td_status = EHCI_int_AllocateTD(Cont, PID_IN, InData, InLength, Cb, CbData);
+ }
+ else
+ {
+ td_data = EHCI_int_AllocateTD(Cont, PID_IN, InData, InLength, NULL, NULL);
+ td_status = EHCI_int_AllocateTD(Cont, PID_OUT, (void*)OutData, OutLength, Cb, CbData);
+ }
+
+ // Append TDs
+ EHCI_int_AppendTD(Dest, td_setup);
+ EHCI_int_AppendTD(Dest, td_data);
+ EHCI_int_AppendTD(Dest, td_status);
+
+ return td_status;
+}
+
+void *EHCI_SendBulk(void *Ptr, void *Dest, tUSBHostCb Cb, void *CbData, int Dir, void *Data, size_t Length)
+{
+ tEHCI_Controller *Cont = Ptr;
+
+ // Sanity check the pointer
+ // - Can't be NULL or an isoch
+ if( (tVAddr)Dest <= 256*16 )
+ return NULL;
+
+ // Allocate single TD
+ tEHCI_qTD *td = EHCI_int_AllocateTD(Cont, (Dir ? PID_OUT : PID_IN), Data, Length, Cb, CbData);
+ EHCI_int_AppendTD(Dest, td);
+ return td;
+}
+
+void EHCI_FreeOp(void *Ptr, void *Handle)
+{
+ tEHCI_Controller *Cont = Ptr;
+
+ EHCI_int_DeallocateTD(Cont, Handle);
+}
+
+// --------------------------------------------------------------------
+// Internals
+// --------------------------------------------------------------------
+tEHCI_qTD *EHCI_int_AllocateTD(tEHCI_Controller *Cont, int PID, void *Data, size_t Length, tUSBHostCb Cb, void *CbData)
+{
+ return NULL;
+}
+
+void EHCI_int_DeallocateTD(tEHCI_Controller *Cont, tEHCI_qTD *TD)
+{
+}
+
+void EHCI_int_AppendTD(tEHCI_QH *QH, tEHCI_qTD *TD)
+{
+}
+
+tEHCI_QH *EHCI_int_AllocateQH(tEHCI_Controller *Cont, int Endpoint, size_t MaxPacketSize)
+{
+ return NULL;
+}
+
+void EHCI_int_DeallocateQH(tEHCI_Controller *Cont, tEHCI_QH *QH)
+{
+}
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