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Arduino/hardware/arduino/sam/system/libsam/source/uotghs.c

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/*
Copyright (c) 2012 Arduino. All right reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "chip.h"
#if SAM3XA_SERIES
void USBD_InitEndpoints(void)
{
}
uint32_t USBD_Init(void)
{
uint32_t ul ;
// Enables the USB Clock
pmc_enable_periph_clk(ID_UOTGHS);
pmc_enable_upll_clock();
pmc_switch_udpck_to_upllck(0); // div=0+1
pmc_enable_udpck();
// Configure interrupts
NVIC_SetPriority((IRQn_Type) ID_UOTGHS, 0UL);
NVIC_EnableIRQ((IRQn_Type) ID_UOTGHS);
// Always authorize asynchrone USB interrupts to exit from sleep mode
// for SAM3 USB wake up device except BACKUP mode
pmc_set_fast_startup_input(PMC_FSMR_USBAL);
// Enable USB macro
UOTGHS->UOTGHS_CTRL |= UOTGHS_CTRL_USBE;
// Automatic mode speed for device
UOTGHS->UOTGHS_DEVCTRL &= ~UOTGHS_DEVCTRL_SPDCONF_Msk; // Normal mode
UOTGHS->UOTGHS_DEVCTRL &= ~( UOTGHS_DEVCTRL_LS | UOTGHS_DEVCTRL_TSTJ | UOTGHS_DEVCTRL_TSTK |
UOTGHS_DEVCTRL_TSTPCKT | UOTGHS_DEVCTRL_OPMODE2 ); // Normal mode
UOTGHS->UOTGHS_DEVCTRL = 0;
UOTGHS->UOTGHS_HSTCTRL = 0;
// Enable OTG pad
UOTGHS->UOTGHS_CTRL |= UOTGHS_CTRL_OTGPADE;
// Enable clock OTG pad
UOTGHS->UOTGHS_CTRL &= ~UOTGHS_CTRL_FRZCLK;
// Usb disable
UOTGHS->UOTGHS_CTRL &= ~UOTGHS_CTRL_USBE;
UOTGHS->UOTGHS_CTRL &= ~UOTGHS_CTRL_OTGPADE;
UOTGHS->UOTGHS_CTRL |= UOTGHS_CTRL_FRZCLK;
// Usb enable
UOTGHS->UOTGHS_CTRL |= UOTGHS_CTRL_USBE;
UOTGHS->UOTGHS_CTRL |= UOTGHS_CTRL_OTGPADE;
UOTGHS->UOTGHS_CTRL &= ~UOTGHS_CTRL_FRZCLK;
// Usb select_device
UOTGHS->UOTGHS_CTRL &= ~UOTGHS_CTRL_UIDE;
UOTGHS->UOTGHS_CTRL |= UOTGHS_CTRL_UIMOD_Device;
// Device is in the Attached state
// deviceState = USBD_STATE_SUSPENDED;
// previousDeviceState = USBD_STATE_POWERED;
// Enable USB macro and clear all other bits
UOTGHS->UOTGHS_DEVCTRL |= UOTGHS_CTRL_USBE;
UOTGHS->UOTGHS_DEVCTRL = UOTGHS_CTRL_USBE;
// Configure the pull-up on D+ and disconnect it
USBD_Detach();
// Clear General IT
UOTGHS->UOTGHS_SCR = (UOTGHS_SCR_IDTIC|UOTGHS_SCR_VBUSTIC|UOTGHS_SCR_SRPIC|UOTGHS_SCR_VBERRIC|UOTGHS_SCR_BCERRIC|UOTGHS_SCR_ROLEEXIC|UOTGHS_SCR_HNPERRIC|UOTGHS_SCR_STOIC|UOTGHS_SCR_VBUSRQC);
// Clear OTG Device IT
UOTGHS->UOTGHS_DEVICR = (UOTGHS_DEVICR_SUSPC|UOTGHS_DEVICR_MSOFC|UOTGHS_DEVICR_SOFC|UOTGHS_DEVICR_EORSTC|UOTGHS_DEVICR_WAKEUPC|UOTGHS_DEVICR_EORSMC|UOTGHS_DEVICR_UPRSMC);
// Clear OTG Host IT
UOTGHS->UOTGHS_HSTICR = (UOTGHS_HSTICR_DCONNIC|UOTGHS_HSTICR_DDISCIC|UOTGHS_HSTICR_RSTIC|UOTGHS_HSTICR_RSMEDIC|UOTGHS_HSTICR_RXRSMIC|UOTGHS_HSTICR_HSOFIC|UOTGHS_HSTICR_HWUPIC);
// Reset all Endpoints Fifos
UOTGHS->UOTGHS_DEVEPT |= (UOTGHS_DEVEPT_EPRST0|UOTGHS_DEVEPT_EPRST1|UOTGHS_DEVEPT_EPRST2|UOTGHS_DEVEPT_EPRST3|UOTGHS_DEVEPT_EPRST4|
UOTGHS_DEVEPT_EPRST5|UOTGHS_DEVEPT_EPRST6|UOTGHS_DEVEPT_EPRST7|UOTGHS_DEVEPT_EPRST8);
UOTGHS->UOTGHS_DEVEPT &= ~(UOTGHS_DEVEPT_EPRST0|UOTGHS_DEVEPT_EPRST1|UOTGHS_DEVEPT_EPRST2|UOTGHS_DEVEPT_EPRST3|UOTGHS_DEVEPT_EPRST4|
UOTGHS_DEVEPT_EPRST5|UOTGHS_DEVEPT_EPRST6|UOTGHS_DEVEPT_EPRST7|UOTGHS_DEVEPT_EPRST8);
// Disable all endpoints
UOTGHS->UOTGHS_DEVEPT &= ~(UOTGHS_DEVEPT_EPEN0|UOTGHS_DEVEPT_EPEN1|UOTGHS_DEVEPT_EPEN2|UOTGHS_DEVEPT_EPEN3|UOTGHS_DEVEPT_EPEN4|
UOTGHS_DEVEPT_EPEN5|UOTGHS_DEVEPT_EPEN6|UOTGHS_DEVEPT_EPEN7|UOTGHS_DEVEPT_EPEN8);
// Device is in the Attached state
// deviceState = USBD_STATE_SUSPENDED;
// previousDeviceState = USBD_STATE_POWERED;
// Automatic mode speed for device
UOTGHS->UOTGHS_DEVCTRL &= ~UOTGHS_DEVCTRL_SPDCONF_Msk;
// Force Full Speed mode for device
//UOTGHS->UOTGHS_DEVCTRL = UOTGHS_DEVCTRL_SPDCONF_FORCED_FS;
// Force High Speed mode for device
//UOTGHS->UOTGHS_DEVCTRL = UOTGHS_DEVCTRL_SPDCONF_HIGH_SPEED;
UOTGHS->UOTGHS_DEVCTRL &= ~(UOTGHS_DEVCTRL_LS|UOTGHS_DEVCTRL_TSTJ| UOTGHS_DEVCTRL_TSTK|UOTGHS_DEVCTRL_TSTPCKT|UOTGHS_DEVCTRL_OPMODE2) ;
// Enable USB macro
UOTGHS->UOTGHS_DEVCTRL |= UOTGHS_CTRL_USBE;
// Enable the UID pin select
UOTGHS->UOTGHS_DEVCTRL |= UOTGHS_CTRL_UIDE;
// Enable OTG pad
UOTGHS->UOTGHS_DEVCTRL |= UOTGHS_CTRL_OTGPADE;
// Enable clock OTG pad
UOTGHS->UOTGHS_DEVCTRL &= ~UOTGHS_CTRL_FRZCLK;
// With OR without DMA !!!
// Initialization of DMA
for( ul=1; ul<= UOTGHSDEVDMA_NUMBER ; ul++ )
{
// RESET endpoint canal DMA:
// DMA stop channel command
UOTGHS->UOTGHS_DEVDMA[ul].UOTGHS_DEVDMACONTROL = 0; // STOP command
// Disable endpoint
UOTGHS->UOTGHS_DEVEPTIDR[ul] = (UOTGHS_DEVEPTIDR_TXINEC|UOTGHS_DEVEPTIDR_RXOUTEC|UOTGHS_DEVEPTIDR_RXSTPEC|UOTGHS_DEVEPTIDR_UNDERFEC|UOTGHS_DEVEPTIDR_NAKOUTEC|
UOTGHS_DEVEPTIDR_HBISOINERREC|UOTGHS_DEVEPTIDR_NAKINEC|UOTGHS_DEVEPTIDR_HBISOFLUSHEC|UOTGHS_DEVEPTIDR_OVERFEC|UOTGHS_DEVEPTIDR_STALLEDEC|
UOTGHS_DEVEPTIDR_CRCERREC|UOTGHS_DEVEPTIDR_SHORTPACKETEC|UOTGHS_DEVEPTIDR_MDATEC|UOTGHS_DEVEPTIDR_DATAXEC|UOTGHS_DEVEPTIDR_ERRORTRANSEC|
UOTGHS_DEVEPTIDR_NBUSYBKEC|UOTGHS_DEVEPTIDR_FIFOCONC|UOTGHS_DEVEPTIDR_EPDISHDMAC|UOTGHS_DEVEPTIDR_NYETDISC|UOTGHS_DEVEPTIDR_STALLRQC);
// Reset endpoint config
UOTGHS->UOTGHS_DEVEPTCFG[ul] = 0UL;
// Reset DMA channel (Buff count and Control field)
UOTGHS->UOTGHS_DEVDMA[ul].UOTGHS_DEVDMACONTROL = 0x02UL; // NON STOP command
// Reset DMA channel 0 (STOP)
UOTGHS->UOTGHS_DEVDMA[ul].UOTGHS_DEVDMACONTROL = 0UL; // STOP command
// Clear DMA channel status (read the register to clear it)
UOTGHS->UOTGHS_DEVDMA[ul].UOTGHS_DEVDMASTATUS = UOTGHS->UOTGHS_DEVDMA[ul].UOTGHS_DEVDMASTATUS;
}
UOTGHS->UOTGHS_DEVCTRL |= UOTGHS_CTRL_VBUSTE;
UOTGHS->UOTGHS_DEVIER = UOTGHS_DEVIER_WAKEUPES;
return 0UL ;
}
void USBD_Attach(void)
{
UOTGHS->UOTGHS_DEVCTRL &= ~(unsigned int)UOTGHS_DEVCTRL_DETACH;
}
void USBD_Detach(void)
{
UOTGHS->UOTGHS_DEVCTRL |= UOTGHS_DEVCTRL_DETACH;
}
#endif /* SAM3XA_SERIES */