int usb_start(USBEnumerateHandler hEnumerate, USBStartHandler hStart) {
enumerateHandler = hEnumerate;
startHandler = hStart;
currentlySending = 0xFF;
if(txQueue == NULL)
txQueue = createRingBuffer(TX_QUEUE_LEN);
initializeDescriptors();
if(controlSendBuffer == NULL)
controlSendBuffer = memalign(DMA_ALIGN, CONTROL_SEND_BUFFER_LEN);
if(controlRecvBuffer == NULL)
controlRecvBuffer = memalign(DMA_ALIGN, CONTROL_RECV_BUFFER_LEN);
SET_REG(USB + GAHBCFG, GAHBCFG_DMAEN | GAHBCFG_BSTLEN_INCR8 | GAHBCFG_MASKINT);
SET_REG(USB + GUSBCFG, GUSBCFG_PHYIF16BIT | GUSBCFG_SRPENABLE | GUSBCFG_HNPENABLE | ((5 & GUSBCFG_TURNAROUND_MASK) << GUSBCFG_TURNAROUND_SHIFT));
SET_REG(USB + DCFG, DCFG_HISPEED); // some random setting. See specs
SET_REG(USB + DCFG, GET_REG(USB + DCFG) & ~(DCFG_DEVICEADDRMSK));
InEPRegs[0].control = USB_EPCON_ACTIVE;
OutEPRegs[0].control = USB_EPCON_ACTIVE;
SET_REG(USB + GRXFSIZ, RX_FIFO_DEPTH);
SET_REG(USB + GNPTXFSIZ, (TX_FIFO_DEPTH << GNPTXFSIZ_DEPTH_SHIFT) | TX_FIFO_STARTADDR);
int i;
for(i = 0; i < USB_NUM_ENDPOINTS; i++) {
InEPRegs[i].interrupt = USB_EPINT_INEPNakEff | USB_EPINT_INTknEPMis | USB_EPINT_INTknTXFEmp
| USB_EPINT_TimeOUT | USB_EPINT_AHBErr | USB_EPINT_EPDisbld | USB_EPINT_XferCompl;
OutEPRegs[i].interrupt = USB_EPINT_OUTTknEPDis
| USB_EPINT_SetUp | USB_EPINT_AHBErr | USB_EPINT_EPDisbld | USB_EPINT_XferCompl;
InEPRegs[i].control = (InEPRegs[i].control & ~(DCTL_NEXTEP_MASK << DCTL_NEXTEP_SHIFT));
}
SET_REG(USB + GINTMSK, GINTMSK_OTG | GINTMSK_SUSPEND | GINTMSK_RESET | GINTMSK_INEP | GINTMSK_OEP | GINTMSK_DISCONNECT);
SET_REG(USB + DAINTMSK, DAINTMSK_ALL);
SET_REG(USB + DOEPMSK, USB_EPINT_XferCompl | USB_EPINT_SetUp | USB_EPINT_Back2BackSetup);
SET_REG(USB + DIEPMSK, USB_EPINT_XferCompl | USB_EPINT_AHBErr | USB_EPINT_TimeOUT);
InEPRegs[0].interrupt = USB_EPINT_ALL;
OutEPRegs[0].interrupt = USB_EPINT_ALL;
SET_REG(USB + DCTL, DCTL_PROGRAMDONE + DCTL_CGOUTNAK + DCTL_CGNPINNAK);
udelay(USB_PROGRAMDONE_DELAYUS);
SET_REG(USB + GOTGCTL, GET_REG(USB + GOTGCTL) | GOTGCTL_SESSIONREQUEST);
receiveControl(controlRecvBuffer, sizeof(USBSetupPacket));
change_state(USBPowered);
interrupt_enable(USB_INTERRUPT);
return 0;
}
int usb_setup(USBEnumerateHandler hEnumerate, USBStartHandler hStart)
{
usb_shutdown();
// This is not relevant to the hardware,
// and usb_setup is called when setting up a new
// USB protocol. So we should reset the EP
// handlers here! -- Ricky26
memset(endpoint_handlers, 0, sizeof(endpoint_handlers));
startHandler = hStart;
enumerateHandler = hEnumerate;
setupHandler = NULL;
if(usb_inited)
return 0;
if(controlSendBuffer == NULL)
controlSendBuffer = memalign(DMA_ALIGN, CONTROL_SEND_BUFFER_LEN);
if(controlRecvBuffer == NULL)
controlRecvBuffer = memalign(DMA_ALIGN, CONTROL_RECV_BUFFER_LEN);
InEPRegs = (USBEPRegisters*)(USB + USB_INREGS);
OutEPRegs = (USBEPRegisters*)(USB + USB_OUTREGS);
change_state(USBStart);
initializeDescriptors();
// Initialize our data structures
memset(usb_message_queue, 0, sizeof(usb_message_queue));
#ifdef USB_PHY_1G
// Power on hardware
power_ctrl(POWER_USB, ON);
udelay(USB_START_DELAYUS);
#else
// Wait for USB hardware to come alive
udelay(10000);
#endif
// Set up the hardware
clock_gate_switch(USB_OTGCLOCKGATE, ON);
clock_gate_switch(USB_PHYCLOCKGATE, ON);
#ifdef USB_PHY_1G
clock_gate_switch(EDRAM_CLOCKGATE, ON);
#endif
// power on OTG
SET_REG(USB + PCGCCTL, (GET_REG(USB + PCGCCTL) & (~PCGCCTL_ONOFF_MASK)) | PCGCCTL_ON);
udelay(USB_ONOFFSTART_DELAYUS);
// Generate a soft disconnect on host
//SET_REG(USB + DCTL, GET_REG(USB + DCTL) | DCTL_SFTDISCONNECT);
//udelay(USB_SFTDISCONNECT_DELAYUS);
// Initialise PHY
usb_phy_init();
bufferPrintf("USB: Hardware Configuration\n"
" HWCFG1 = 0x%08x\n"
" HWCFG2 = 0x%08x\n"
" HWCFG3 = 0x%08x\n"
" HWCFG4 = 0x%08x\n",
GET_REG(USB+GHWCFG1),
GET_REG(USB+GHWCFG2),
GET_REG(USB+GHWCFG3),
GET_REG(USB+GHWCFG4));
usb_inited = TRUE;
interrupt_install(USB_INTERRUPT, usbIRQHandler, 0);
// Start USB
usb_start();
return 0;
}