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crashtest-r0ket/core/usbcdc/usbhw.c

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/*----------------------------------------------------------------------------
* U S B - K e r n e l
*----------------------------------------------------------------------------
* Name: usbhw.c
* Purpose: USB Hardware Layer Module for Philips LPC17xx
* Version: V1.20
*----------------------------------------------------------------------------
* This software is supplied "AS IS" without any warranties, express,
* implied or statutory, including but not limited to the implied
* warranties of fitness for purpose, satisfactory quality and
* noninfringement. Keil extends you a royalty-free right to reproduce
* and distribute executable files created using this software for use
* on NXP Semiconductors LPC microcontroller devices only. Nothing else
* gives you the right to use this software.
*
* Copyright (c) 2009 Keil - An ARM Company. All rights reserved.
*----------------------------------------------------------------------------
* History:
* V1.20 Added USB_ClearEPBuf
* V1.00 Initial Version
*----------------------------------------------------------------------------*/
#include "projectconfig.h" /* LPC13xx definitions */
#include "usb.h"
#include "usbcfg.h"
#include "usbreg.h"
#include "usbhw.h"
#include "usbcore.h"
#include "usbuser.h"
/*
* USB and IO Clock configuration only.
* The same as call PeriClkIOInit(IOCON_USB);
* The purpose is to reduce the code space for
* overall USB project and reserve code space for
* USB debugging.
* Parameters: None
* Return Value: None
*/
void USBIOClkConfig( void )
{
/* Enable AHB clock to the GPIO domain. */
SCB_SYSAHBCLKCTRL |= SCB_SYSAHBCLKCTRL_GPIO;
/* Enable Timer32_1, IOCON, and USB blocks */
SCB_SYSAHBCLKCTRL |= (SCB_SYSAHBCLKCTRL_CT32B1 | SCB_SYSAHBCLKCTRL_IOCON | SCB_SYSAHBCLKCTRL_USB_REG);
// Setup USB clock
SCB_PDRUNCFG &= ~(SCB_PDSLEEPCFG_USBPAD_PD); // Power-up USB PHY
SCB_PDRUNCFG &= ~(SCB_PDSLEEPCFG_USBPLL_PD); // Power-up USB PLL
SCB_USBPLLCLKSEL = SCB_USBPLLCLKSEL_SOURCE_MAINOSC; // Select PLL Input
SCB_USBPLLCLKUEN = SCB_USBPLLCLKUEN_UPDATE; // Update Clock Source
SCB_USBPLLCLKUEN = SCB_USBPLLCLKUEN_DISABLE; // Toggle Update Register
SCB_USBPLLCLKUEN = SCB_USBPLLCLKUEN_UPDATE;
// Wait until the USB clock is updated
while (!(SCB_USBPLLCLKUEN & SCB_USBPLLCLKUEN_UPDATE));
// Set USB clock to 48MHz (12MHz x 4)
SCB_USBPLLCTRL = (SCB_USBPLLCTRL_MULT_4);
while (!(SCB_USBPLLSTAT & SCB_USBPLLSTAT_LOCK)); // Wait Until PLL Locked
SCB_USBCLKSEL = SCB_USBCLKSEL_SOURCE_USBPLLOUT;
// Set USB pin functions
IOCON_PIO0_1 &= ~IOCON_PIO0_1_FUNC_MASK;
IOCON_PIO0_1 |= IOCON_PIO0_1_FUNC_CLKOUT; // CLK OUT
IOCON_PIO0_3 &= ~IOCON_PIO0_3_FUNC_MASK;
IOCON_PIO0_3 |= IOCON_PIO0_3_FUNC_USB_VBUS; // VBus
IOCON_PIO0_6 &= ~IOCON_PIO0_6_FUNC_MASK;
IOCON_PIO0_6 |= IOCON_PIO0_6_FUNC_USB_CONNECT; // Soft Connect
return;
}
/*
* Delay number of clock cycles
* Parameters: Delay length
* Return Value: None
*/
void delay (uint32_t length )
{
uint32_t i;
for ( i = 0; i < length; i++ )
{
__asm("nop");
}
return;
}
/*
* Get Endpoint Physical Address
* Parameters: EPNum: Endpoint Number
* EPNum.0..3: Address
* EPNum.7: Dir
* Return Value: Endpoint Physical Address
*/
uint32_t EPAdr (uint32_t EPNum)
{
uint32_t val;
val = (EPNum & 0x0F) << 1;
if (EPNum & 0x80) {
val += 1;
}
return (val);
}
/*
* Write Command
* Parameters: cmd: Command
* Return Value: None
*/
void WrCmd (uint32_t cmd)
{
USB_DEVINTCLR = CCEMTY_INT;
USB_CMDCODE = cmd;
while ((USB_DEVINTST & (CCEMTY_INT | DEV_STAT_INT)) == 0);
}
/*
* Write Command Data
* Parameters: cmd: Command
* val: Data
* Return Value: None
*/
void WrCmdDat (uint32_t cmd, uint32_t val)
{
WrCmd(cmd);
WrCmd(val);
}
/*
* Write Command to Endpoint
* Parameters: cmd: Command
* val: Data
* Return Value: None
*/
void WrCmdEP (uint32_t EPNum, uint32_t cmd)
{
WrCmd(CMD_SEL_EP(EPAdr(EPNum)));
WrCmd(cmd);
}
/*
* Read Command Data
* Parameters: cmd: Command
* Return Value: Data Value
*/
uint32_t RdCmdDat (uint32_t cmd)
{
USB_DEVINTCLR = CCEMTY_INT | CDFULL_INT;
USB_CMDCODE = cmd;
while ((USB_DEVINTST & (CDFULL_INT | DEV_STAT_INT)) == 0);
return (USB_CMDDATA);
}
/*
* USB Initialize Function
* Called by the User to initialize USB
* Return Value: None
*/
void USB_Init (void)
{
// Setup USB clock and pins
USBIOClkConfig();
#if USB_FIQ_EVENT
/* It's important that only BULK and FRAME(ISO) can be routed
to FIQ. */
USB_DEVFIQSEL = 0x01; /* SOF Use FIQ */
/* Enable the USB Interrupt */
NVIC_EnableIRQ(USB_FIQn);
#endif
/* Enable the USB Interrupt */
NVIC_EnableIRQ(USB_IRQn);
USB_Reset();
USB_SetAddress(0);
return;
}
/*
* USB Connect Function
* Called by the User to Connect/Disconnect USB
* Parameters: con: Connect/Disconnect
* Return Value: None
*/
void USB_Connect (uint32_t con)
{
WrCmdDat(CMD_SET_DEV_STAT, DAT_WR_BYTE(con ? DEV_CON : 0));
}
/*
* USB Reset Function
* Called automatically on USB Reset
* Return Value: None
*/
void USB_Reset (void)
{
USB_DEVINTCLR = 0x000FFFFF;
/* Enable all eight(8) EPs, note: EP won't be ready until it's
configured/enabled when device sending SetEPStatus command
to the command engine. */
USB_DEVINTEN = DEV_STAT_INT | (0xFF<<1) |
(USB_SOF_EVENT ? FRAME_INT : 0);
return;
}
/*
* USB Suspend Function
* Called automatically on USB Suspend
* Return Value: None
*/
void USB_Suspend (void)
{
/* Performed by Hardware */
}
/*
* USB Resume Function
* Called automatically on USB Resume
* Return Value: None
*/
void USB_Resume (void)
{
/* Performed by Hardware */
}
/*
* USB Remote Wakeup Function
* Called automatically on USB Remote Wakeup
* Return Value: None
*/
void USB_WakeUp (void)
{
if (USB_DeviceStatus & USB_GETSTATUS_REMOTE_WAKEUP)
{
WrCmdDat(CMD_SET_DEV_STAT, DAT_WR_BYTE(DEV_CON));
}
}
/*
* USB Remote Wakeup Configuration Function
* Parameters: cfg: Enable/Disable
* Return Value: None
*/
void USB_WakeUpCfg (uint32_t cfg)
{
cfg = cfg; /* Not needed */
}
/*
* USB Set Address Function
* Parameters: adr: USB Address
* Return Value: None
*/
void USB_SetAddress (uint32_t adr)
{
WrCmdDat(CMD_SET_ADDR, DAT_WR_BYTE(DEV_EN | adr)); /* Don't wait for next */
WrCmdDat(CMD_SET_ADDR, DAT_WR_BYTE(DEV_EN | adr)); /* Setup Status Phase */
}
/*
* USB Configure Function
* Parameters: cfg: Configure/Deconfigure
* Return Value: None
*/
void USB_Configure (uint32_t cfg)
{
WrCmdDat(CMD_CFG_DEV, DAT_WR_BYTE(cfg ? CONF_DVICE : 0));
return;
}
/*
* Configure USB Endpoint according to Descriptor
* Parameters: pEPD: Pointer to Endpoint Descriptor
* Return Value: None
*/
void USB_ConfigEP (USB_ENDPOINT_DESCRIPTOR *pEPD)
{
return;
}
/*
* Set Direction for USB Control Endpoint
* Parameters: dir: Out (dir == 0), In (dir <> 0)
* Return Value: None
*/
void USB_DirCtrlEP (uint32_t dir)
{
dir = dir; /* Not needed */
}
/*
* Enable USB Endpoint
* Parameters: EPNum: Endpoint Number
* EPNum.0..3: Address
* EPNum.7: Dir
* Return Value: None
*/
void USB_EnableEP (uint32_t EPNum)
{
WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(0));
}
/*
* Disable USB Endpoint
* Parameters: EPNum: Endpoint Number
* EPNum.0..3: Address
* EPNum.7: Dir
* Return Value: None
*/
void USB_DisableEP (uint32_t EPNum)
{
WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(EP_STAT_DA));
}
/*
* Reset USB Endpoint
* Parameters: EPNum: Endpoint Number
* EPNum.0..3: Address
* EPNum.7: Dir
* Return Value: None
*/
void USB_ResetEP (uint32_t EPNum)
{
WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(0));
}
/*
* Set Stall for USB Endpoint
* Parameters: EPNum: Endpoint Number
* EPNum.0..3: Address
* EPNum.7: Dir
* Return Value: None
*/
void USB_SetStallEP (uint32_t EPNum)
{
WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(EP_STAT_ST));
}
/*
* Clear Stall for USB Endpoint
* Parameters: EPNum: Endpoint Number
* EPNum.0..3: Address
* EPNum.7: Dir
* Return Value: None
*/
void USB_ClrStallEP (uint32_t EPNum)
{
WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(0));
}
/*
* Clear USB Endpoint Buffer
* Parameters: EPNum: Endpoint Number
* EPNum.0..3: Address
* EPNum.7: Dir
* Return Value: None
*/
void USB_ClearEPBuf (uint32_t EPNum)
{
WrCmdEP(EPNum, CMD_CLR_BUF);
}
/*
* Read USB Endpoint Data
* Parameters: EPNum: Endpoint Number
* EPNum.0..3: Address
* EPNum.7: Dir
* pData: Pointer to Data Buffer
* Return Value: Number of bytes read
*/
uint32_t USB_ReadEP (uint32_t EPNum, uint8_t *pData)
{
uint32_t cnt, n;
USB_CTRL = ((EPNum & 0x0F) << 2) | CTRL_RD_EN;
/* 3 clock cycles to fetch the packet length from RAM. */
delay( 5 );
do
{
cnt = USB_RXPLEN;
} while ((cnt & PKT_DV) == 0);
cnt &= PKT_LNGTH_MASK;
for (n = 0; n < (cnt + 3) / 4; n++)
{
*((uint32_t __attribute__((packed)) *)pData) = USB_RXDATA;
pData += 4;
}
USB_CTRL = 0;
if ((EPNum & 0x80) != 0x04)
{ /* Non-Isochronous Endpoint */
WrCmdEP(EPNum, CMD_CLR_BUF);
}
return (cnt);
}
/*
* Write USB Endpoint Data
* Parameters: EPNum: Endpoint Number
* EPNum.0..3: Address
* EPNum.7: Dir
* pData: Pointer to Data Buffer
* cnt: Number of bytes to write
* Return Value: Number of bytes written
*/
uint32_t USB_WriteEP (uint32_t EPNum, uint8_t *pData, uint32_t cnt)
{
uint32_t n;
USB_CTRL = ((EPNum & 0x0F) << 2) | CTRL_WR_EN;
/* 3 clock cycles to fetch the packet length from RAM. */
delay( 5 );
USB_TXPLEN = cnt;
for (n = 0; n < (cnt + 3) / 4; n++)
{
USB_TXDATA = *((uint32_t __attribute__((packed)) *)pData);
pData += 4;
}
USB_CTRL = 0;
WrCmdEP(EPNum, CMD_VALID_BUF);
return (cnt);
}
/*
* Get USB Last Frame Number
* Parameters: None
* Return Value: Frame Number
*/
uint32_t USB_GetFrame (void)
{
uint32_t val;
WrCmd(CMD_RD_FRAME);
val = RdCmdDat(DAT_RD_FRAME);
val = val | (RdCmdDat(DAT_RD_FRAME) << 8);
return (val);
}
/*
* USB Interrupt Service Routine
*/
#ifdef CFG_USBCDC
void USB_IRQHandler (void)
{
uint32_t disr, val, n, m;
disr = USB_DEVINTST; /* Device Interrupt Status */
USB_DEVINTCLR = disr;
/* Device Status Interrupt (Reset, Connect change, Suspend/Resume) */
if (disr & DEV_STAT_INT)
{
WrCmd(CMD_GET_DEV_STAT);
val = RdCmdDat(DAT_GET_DEV_STAT); /* Device Status */
if (val & DEV_RST) { /* Reset */
USB_Reset();
#if USB_RESET_EVENT
USB_Reset_Event();
#endif
}
if (val & DEV_CON_CH) { /* Connect change */
#if USB_POWER_EVENT
USB_Power_Event(val & DEV_CON);
#endif
}
if (val & DEV_SUS_CH) { /* Suspend/Resume */
if (val & DEV_SUS) { /* Suspend */
USB_Suspend();
#if USB_SUSPEND_EVENT
USB_Suspend_Event();
#endif
} else { /* Resume */
USB_Resume();
#if USB_RESUME_EVENT
USB_Resume_Event();
#endif
}
}
goto isr_end;
}
#if USB_SOF_EVENT
/* Start of Frame Interrupt */
if (disr & FRAME_INT)
{
USB_DEVINTCLR = FRAME_INT;
USB_SOF_Event();
// SOFIRQCount++;
}
#endif
#if USB_ERROR_EVENT
/* NO error interrupt anymore, below code can be used
as example to get error status from command engine. */
/* Error Interrupt */
if (disr & ERR_INT)
{
WrCmd(CMD_RD_ERR_STAT);
val = RdCmdDat(DAT_RD_ERR_STAT);
USB_Error_Event(val);
}
#endif
/* Endpoint's Interrupt */
if (disr & (0xFF<<1)) {
/* if any of the EP0 through EP7 is set, or bit 1 through 9 on disr */
for (n = 0; n < USB_EP_NUM; n++) { /* Check All Endpoints */
/* skip frame interrupt at bit 0 in disr */
// if (disr & ((1 << n)<<1)) {
if ((disr>>1) & (1 << n)) {
m = n >> 1;
/* clear EP interrupt by sending cmd to the command engine. */
WrCmd(CMD_SEL_EP_CLRI(n));
val = RdCmdDat(DAT_SEL_EP_CLRI(n));
if ((n & 1) == 0) { /* OUT Endpoint */
if (n == 0) { /* Control OUT Endpoint */
if (val & EP_SEL_STP) { /* Setup Packet */
if (USB_P_EP[0]) {
USB_P_EP[0](USB_EVT_SETUP);
continue;
}
}
}
if (USB_P_EP[m]) {
USB_P_EP[m](USB_EVT_OUT);
}
} else { /* IN Endpoint */
if (USB_P_EP[m]) {
USB_P_EP[m](USB_EVT_IN);
}
}
}
}
}
isr_end:
return;
}
#endif
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