📄 usbsetup.c
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/**************************************************************
NAME: usbsetup.c
DESC: process the USB setup stage operations.
HISTORY:
MAR.25.2002:purnnamu: S3C2400X usbsetup.c is ported for S3C2410X.
AUG.20.2002:purnnamu: rEP0_CSR should be used instead of rOUT_CSR1_REG for EP0 macros.
**************************************************************/
#include "Includes.h"
// *** End point information ***
// EP0: control
// EP1: bulk in end point
// EP2: not used
// EP3: bulk out end point
// EP4: not used
// *** VERY IMPORTANT NOTE ***
// Every descriptor size of EP0 should be 8n+m(m=1~7).
// Otherwise, USB will not operate normally because the program
// doesn't prepare the case that the descriptor size is 8n+0.
// If the size of a descriptor is 8n, the 0 length packit should be sent.
// Special thanks to E.S.Choi for reminding me of this USB specification.
// ===================================================================
// All following commands will operate only in case
// - ep0_csr is valid.
// ===================================================================
#define CLR_EP0_OUT_PKT_RDY() rEP0_CSR=( ep0_csr & (~EP0_WR_BITS)| \
EP0_SERVICED_OUT_PKT_RDY )
#define CLR_EP0_OUTPKTRDY_DATAEND() rEP0_CSR=( ep0_csr & (~EP0_WR_BITS)| \
(EP0_SERVICED_OUT_PKT_RDY|EP0_DATA_END) )
#define SET_EP0_IN_PKT_RDY() rEP0_CSR=( ep0_csr & (~EP0_WR_BITS)| \
(EP0_IN_PKT_READY) )
#define SET_EP0_INPKTRDY_DATAEND() rEP0_CSR=( ep0_csr & (~EP0_WR_BITS)| \
(EP0_IN_PKT_READY|EP0_DATA_END) )
#define CLR_EP0_SETUP_END() rEP0_CSR=( ep0_csr & (~EP0_WR_BITS)| \
(EP0_SERVICED_SETUP_END) )
#define CLR_EP0_SENT_STALL() rEP0_CSR=( ep0_csr & (~EP0_WR_BITS)& \
(~EP0_SENT_STALL) )
#define FLUSH_EP0_FIFO() {while(rOUT_FIFO_CNT1_REG)rEP0_FIFO;}
U32 ep0State;
U32 ep0SubState;
volatile U08 Rwuen;
volatile U08 Configuration=1;
volatile U08 AlterSetting;
volatile U08 Selfpwr=TRUE;
volatile U08 device_status;
volatile U08 interface_status;
volatile U08 endpoint0_status;
volatile U08 endpoint1_status;
volatile U08 endpoint3_status;
struct USB_SETUP_DATA descSetup;
struct USB_DEVICE_DESCRIPTOR descDev;
struct USB_CONFIGURATION_DESCRIPTOR descConf;
struct USB_INTERFACE_DESCRIPTOR descIf;
struct USB_ENDPOINT_DESCRIPTOR descEndpt0;
struct USB_ENDPOINT_DESCRIPTOR descEndpt1;
struct USB_CONFIGURATION_SET ConfigSet;
struct USB_INTERFACE_GET InterfaceGet;
struct USB_GET_STATUS StatusGet; //={0,0,0,0,0};
static const U08 descStr0[] = {
4,STRING_TYPE,LANGID_US_L,LANGID_US_H, //codes representing languages
};
static const U08 descStr1[] = { //Manufacturer
(0x14+2),STRING_TYPE,
'S',0x0,'y',0x0,'s',0x0,'t',0x0,'e',0x0,'m',0x0,' ',0x0,'M',0x0,
'C',0x0,'U',0x0,
};
static const U08 descStr2[] = { //Product
(0x2a+2),STRING_TYPE,
'S',0x0,'E',0x0,'C',0x0,' ',0x0,'S',0x0,'3',0x0,'C',0x0,'2',0x0,
'4',0x0,'1',0x0,'0',0x0,'X',0x0,' ',0x0,'T',0x0,'e',0x0,'s',0x0,
't',0x0,' ',0x0,'B',0x0,'/',0x0,'D',0x0
};
void Ep0Handler(void)
{
static int ep0SubState;
int i;
U08 ep0_csr;
rINDEX_REG = 0;
ep0_csr = rEP0_CSR;
// Uart_Printf("\nEP0<0:%4x]",ep0_csr);
//DATAEND interrupt(ep0_csr==0x0) will be ignored
//because ep0State==EP0_STATE_INIT when the DATAEND interrupt is issued.
if(ep0_csr & EP0_SETUP_END) { //0x10
//Host may end GET_DESCRIPTOR operation without completing the IN data stage.
//If host does that, SETUP_END bit will be set.
//OUT_PKT_RDY has to be also cleared because status stage sets OUT_PKT_RDY to 1.
// Uart_Printf("\n[SETUPEND]");
CLR_EP0_SETUP_END();
if(ep0_csr & EP0_OUT_PKT_READY) {//0x02
FLUSH_EP0_FIFO(); //(???)
//I think this isn't needed because EP0 flush is done automatically.
CLR_EP0_OUT_PKT_RDY();
}
ep0State = EP0_STATE_INIT;
return;
}
//I think that EP0_SENT_STALL will not be set to 1.
if(ep0_csr & EP0_SENT_STALL) { //0x20
UartPrintf(1,"[STALL]");
CLR_EP0_SENT_STALL();
if(ep0_csr & EP0_OUT_PKT_READY) {
CLR_EP0_OUT_PKT_RDY();
}
ep0State = EP0_STATE_INIT;
return;
}
if((ep0_csr & EP0_OUT_PKT_READY) && (ep0State==EP0_STATE_INIT)) {
RdPktEp0((U08 *)&descSetup,EP0_PKT_SIZE);
PrintEp0Pkt((U08 *)(&descSetup)); //DEBUG
switch(descSetup.bRequest) {
case GET_DESCRIPTOR:
switch(descSetup.bValueH) {
case DEVICE_TYPE:
DbgPrintf("[GDD]");
CLR_EP0_OUT_PKT_RDY();
ep0State=EP0_STATE_GD_DEV_0;
break;
case CONFIGURATION_TYPE:
DbgPrintf("[GDC]");
CLR_EP0_OUT_PKT_RDY();
if((descSetup.bLengthL+(descSetup.bLengthH<<8))>0x9) {
//bLengthH should be used for bLength=0x209 at WIN2K.
ep0State = EP0_STATE_GD_CFG_0; //for WIN98,WIN2K
}
else {
ep0State = EP0_STATE_GD_CFG_ONLY_0; //for WIN2K
}
break;
case STRING_TYPE:
DbgPrintf("[GDS]");
CLR_EP0_OUT_PKT_RDY();
switch(descSetup.bValueL) {
case 0:
ep0State=EP0_STATE_GD_STR_I0;
break;
case 1:
ep0State=EP0_STATE_GD_STR_I1;
break;
case 2:
ep0State=EP0_STATE_GD_STR_I2;
break;
default:
DbgPrintf("[UE:STRI?]");
break;
}
ep0SubState=0;
break;
case INTERFACE_TYPE:
DbgPrintf("[GDI]");
CLR_EP0_OUT_PKT_RDY();
ep0State=EP0_STATE_GD_IF_ONLY_0; //for WIN98
break;
case ENDPOINT_TYPE:
DbgPrintf("[GDE]");
CLR_EP0_OUT_PKT_RDY();
switch(descSetup.bValueL&0xf) {
case 0:
ep0State=EP0_STATE_GD_EP0_ONLY_0;
break;
case 1:
ep0State=EP0_STATE_GD_EP1_ONLY_0;
break;
default:
DbgPrintf("[UE:GDE?]");
break;
}
break;
default:
DbgPrintf("[UE:GD?]");
break;
}
break;
case SET_ADDRESS:
DbgPrintf("[SA:%d]",descSetup.bValueL);
rFUNC_ADDR_REG=descSetup.bValueL | 0x80;
CLR_EP0_OUTPKTRDY_DATAEND(); //Because of no data control transfers.
ep0State=EP0_STATE_INIT;
break;
case SET_CONFIGURATION:
DbgPrintf("[SC]");
ConfigSet.ConfigurationValue=descSetup.bValueL;
CLR_EP0_OUTPKTRDY_DATAEND(); //Because of no data control transfers.
ep0State=EP0_STATE_INIT;
usbd_cfg.bits.isUsbdSetCfg = 1;
break;
//////////////////////// For chapter 9 test ////////////////////
case CLEAR_FEATURE:
switch (descSetup.bmRequestType) {
case DEVICE_RECIPIENT:
if (descSetup.bValueL == 1) {
Rwuen = FALSE;
}
break;
case ENDPOINT_RECIPIENT:
if (descSetup.bValueL == 0) {
if((descSetup.bIndexL & 0x7f) == 0x00) {
StatusGet.Endpoint0= 0;
}
if((descSetup.bIndexL & 0x8f) == 0x81) { // IN Endpoint 1
StatusGet.Endpoint1= 0;
}
if((descSetup.bIndexL & 0x8f) == 0x03) { // OUT Endpoint 3
StatusGet.Endpoint3= 0;
}
}
break;
default:
break;
}
CLR_EP0_OUTPKTRDY_DATAEND();
ep0State = EP0_STATE_INIT;
break;
case GET_CONFIGURATION:
CLR_EP0_OUT_PKT_RDY();
ep0State = EP0_CONFIG_SET;
break;
case GET_INTERFACE:
CLR_EP0_OUT_PKT_RDY();
ep0State = EP0_INTERFACE_GET;
break;
case GET_STATUS:
switch(descSetup.bmRequestType) {
case (0x80):
CLR_EP0_OUT_PKT_RDY();
StatusGet.Device=((U08)Rwuen<<1)|(U08)Selfpwr;
ep0State=EP0_GET_STATUS0;
break;
case (0x81):
CLR_EP0_OUT_PKT_RDY();
StatusGet.Interface=0;
ep0State=EP0_GET_STATUS1;
break;
case (0x82):
CLR_EP0_OUT_PKT_RDY();
if((descSetup.bIndexL & 0x7f) == 0x00){
ep0State=EP0_GET_STATUS2;
}
if((descSetup.bIndexL & 0x8f) == 0x81){
ep0State=EP0_GET_STATUS3;
}
if((descSetup.bIndexL & 0x8f) == 0x03){
ep0State=EP0_GET_STATUS4;
}
break;
default:
break;
}
break;
case SET_DESCRIPTOR:
CLR_EP0_OUTPKTRDY_DATAEND();
ep0State=EP0_STATE_INIT;
break;
case SET_FEATURE:
switch (descSetup.bmRequestType) {
case DEVICE_RECIPIENT:
if (descSetup.bValueL == 1)
Rwuen = TRUE;
break;
case ENDPOINT_RECIPIENT:
if (descSetup.bValueL == 0) {
if((descSetup.bIndexL & 0x7f) == 0x00){
StatusGet.Endpoint0= 1;
}
if((descSetup.bIndexL & 0x8f) == 0x81){
StatusGet.Endpoint1= 1;
}
if((descSetup.bIndexL & 0x8f) == 0x03){
StatusGet.Endpoint3= 1;
}
}
break;
default:
break;
}
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