usb3.c

武汉创维特ARM7实验箱的全部源代码

#include "44b.h"
#include "44blib.h"
#include "usb.h"
#include "usb_inc.h"
#include "usb_dbg.h"
#include "usb_d12_chap9.h"

///////////////////////////////////////////////////////////////////////////

#define NUM_ENDPOINTS				4

#define CONFIG_DESCRIPTOR_LENGTH    sizeof(USB_CONFIGURATION_DESCRIPTOR) \
									+ sizeof(USB_INTERFACE_DESCRIPTOR) \
									+ (NUM_ENDPOINTS * sizeof(USB_ENDPOINT_DESCRIPTOR))

#define SWAP(X)						X

///////////////////////////////////////////////////////////////////////////

CONTROL_XFER 	ControlData;
EPPFLAGS 		bEPPflags;
unsigned char 	GenEpBuf[EP1_PACKET_SIZE];
IO_REQUEST 		ioRequest;

USB_DEVICE_DESCRIPTOR DeviceDescr =
{
	sizeof(USB_DEVICE_DESCRIPTOR),
    USB_DEVICE_DESCRIPTOR_TYPE,
    SWAP(0x0100),
    USB_CLASS_CODE_TEST_CLASS_DEVICE,
    0, 0,
	EP0_PACKET_SIZE,
	SWAP(0x0471),
#ifndef __C51__
	SWAP(0x0222),
#else
	SWAP(0x0888),
#endif
	SWAP(0x0100),
    0, 0, 0,
    1
};

USB_CONFIGURATION_DESCRIPTOR ConfigDescr =
{
    sizeof(USB_CONFIGURATION_DESCRIPTOR),
    USB_CONFIGURATION_DESCRIPTOR_TYPE,
    SWAP(CONFIG_DESCRIPTOR_LENGTH),
	1,
	1,
    0,
	0x60,
	0x1
};

USB_INTERFACE_DESCRIPTOR InterfaceDescr =
{
    sizeof(USB_INTERFACE_DESCRIPTOR),
    USB_INTERFACE_DESCRIPTOR_TYPE,
    0,
    0,
	NUM_ENDPOINTS,
	USB_CLASS_CODE_TEST_CLASS_DEVICE,
	USB_SUBCLASS_CODE_TEST_CLASS_D12,
	USB_PROTOCOL_CODE_TEST_CLASS_D12,
	0
};

USB_ENDPOINT_DESCRIPTOR EP1_TXDescr =
{
	sizeof(USB_ENDPOINT_DESCRIPTOR),
	USB_ENDPOINT_DESCRIPTOR_TYPE,
	0x81,
	USB_ENDPOINT_TYPE_INTERRUPT,
	SWAP(EP1_PACKET_SIZE),
	10
};

USB_ENDPOINT_DESCRIPTOR EP1_RXDescr =
{
	sizeof(USB_ENDPOINT_DESCRIPTOR),
	USB_ENDPOINT_DESCRIPTOR_TYPE,
	0x1,
	USB_ENDPOINT_TYPE_INTERRUPT,
	SWAP(EP1_PACKET_SIZE),
	10
};

USB_ENDPOINT_DESCRIPTOR EP2_TXDescr =
{
	sizeof(USB_ENDPOINT_DESCRIPTOR),
	USB_ENDPOINT_DESCRIPTOR_TYPE,
	0x82,
	USB_ENDPOINT_TYPE_BULK,
	SWAP(EP2_PACKET_SIZE),
	10
};

USB_ENDPOINT_DESCRIPTOR EP2_RXDescr =
{
	sizeof(USB_ENDPOINT_DESCRIPTOR),
	USB_ENDPOINT_DESCRIPTOR_TYPE,
	0x2,
	USB_ENDPOINT_TYPE_BULK,
	SWAP(EP2_PACKET_SIZE),
	10
};


char * _NAME_USB_REQUEST_DIRECTION[] =
{
	"Host_to_device",
	"Device_to_host"
};

char * _NAME_USB_REQUEST_RECIPIENT[] =
{
	"Device",
	"Interface",
	"Endpoint(0)",
	"Other"
};

char * _NAME_USB_REQUEST_TYPE[] =
{
	"Standard",
	"Class",
	"Vendor",
	"Reserved"
};

char * _NAME_USB_STANDARD_REQUEST[] =
{
	"GET_STATUS",
	"CLEAR_FEATURE",
	"RESERVED",
	"SET_FEATURE",
	"RESERVED",
	"SET_ADDRESS",
	"GET_DESCRIPTOR",
	"SET_DESCRIPTOR",
	"GET_CONFIGURATION",
	"SET_CONFIGURATION",
	"GET_INTERFACE",
	"SET_INTERFACE",
	"SYNC_FRAME"
};

/*
//*************************************************************************
// USB protocol function pointer arrays
//*************************************************************************
*/
void (*StandardDeviceRequest[])(void) =
{
	get_status,
	clear_feature,
	reserved,
	set_feature,
	reserved,
	set_address,
	get_descriptor,
	reserved,
	get_configuration,
	set_configuration,
	get_interface,
	set_interface,
	reserved,
	reserved,
	reserved,
	reserved
};

void (*VendorDeviceRequest[])(void) =
{
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,
	reserved,//ead_write_register,
	reserved,
	reserved,
	reserved
};

///////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////

void control_handler()
{
	unsigned char type, req;

	type = ControlData.DeviceRequest.bmRequestType & USB_REQUEST_TYPE_MASK;
	req = ControlData.DeviceRequest.bRequest & USB_REQUEST_MASK;

	help_devreq(type, req); // print out device request

	if (type == USB_STANDARD_REQUEST)
	{
		USB_DbgPrint(("Request Type = %s, Request = %s.\n", 
			_NAME_USB_REQUEST_TYPE[type],
			_NAME_USB_STANDARD_REQUEST[req]));
			
		(*StandardDeviceRequest[req])();
	}
	else if (type == USB_VENDOR_REQUEST)
		(*VendorDeviceRequest[req])();
	else
		stall_ep0();
}

/*
   //*************************************************************************
   // USB Protocol Layer
   //*************************************************************************
*/

void reserved(void)
{
	stall_ep0();
}

/*
   //*************************************************************************
   // USB standard device requests
   //*************************************************************************
*/

void get_status(void)
{
	unsigned char endp, txdat[2];
	unsigned char bRecipient = ControlData.DeviceRequest.bmRequestType & USB_RECIPIENT;
	unsigned char c;

	if (bRecipient == USB_RECIPIENT_DEVICE) {
		if(bEPPflags.bits.remote_wakeup == 1)
			txdat[0] = 3;
		else
			txdat[0] = 1;
		txdat[1]=0;
		single_transmit(txdat, 2);
	} else if (bRecipient == USB_RECIPIENT_INTERFACE) {
		txdat[0]=0;
		txdat[1]=0;
		single_transmit(txdat, 2);
	} else if (bRecipient == USB_RECIPIENT_ENDPOINT) {
		endp = (unsigned char)(ControlData.DeviceRequest.wIndex & MAX_ENDPOINTS);
		if (ControlData.DeviceRequest.wIndex & (unsigned char)USB_ENDPOINT_DIRECTION_MASK)
			c = D12_SelectEndpoint(endp*2 + 1);	/* Control-in */
		else
			c = D12_SelectEndpoint(endp*2);	/* Control-out */
		if(c & D12_STALL)
			txdat[0] = 1;
		else
			txdat[0] = 0;
		txdat[1] = 0;
		single_transmit(txdat, 2);
	} else
		stall_ep0();
}

void clear_feature(void)
{
	unsigned char endp;
	unsigned char bRecipient = ControlData.DeviceRequest.bmRequestType & USB_RECIPIENT;

	if (bRecipient == USB_RECIPIENT_DEVICE
		&& ControlData.DeviceRequest.wValue == USB_FEATURE_REMOTE_WAKEUP) {
		DISABLE;
		bEPPflags.bits.remote_wakeup = 0;
		ENABLE;
		single_transmit(0, 0);
	}
	else if (bRecipient == USB_RECIPIENT_ENDPOINT
		&& ControlData.DeviceRequest.wValue == USB_FEATURE_ENDPOINT_STALL) {
		endp = (unsigned char)(ControlData.DeviceRequest.wIndex & MAX_ENDPOINTS);
		if (ControlData.DeviceRequest.wIndex & (unsigned char)USB_ENDPOINT_DIRECTION_MASK)
			/* clear TX stall for IN on EPn. */
			D12_SetEndpointStatus(endp*2 + 1, 0);
		else
			/* clear RX stall for OUT on EPn. */
			D12_SetEndpointStatus(endp*2, 0);
		single_transmit(0, 0);
	} else
		stall_ep0();
}

void set_feature(void)
{
	unsigned char endp;
	unsigned char bRecipient = ControlData.DeviceRequest.bmRequestType & USB_RECIPIENT;

	if (bRecipient == USB_RECIPIENT_DEVICE && 
	    ControlData.DeviceRequest.wValue == USB_FEATURE_REMOTE_WAKEUP) 
	{
		DISABLE;
		bEPPflags.bits.remote_wakeup = 1;
		ENABLE;
		single_transmit(0, 0);
	}
	else if (bRecipient == USB_RECIPIENT_ENDPOINT && 
			 ControlData.DeviceRequest.wValue == USB_FEATURE_ENDPOINT_STALL) 
	{
		endp = (unsigned char)(ControlData.DeviceRequest.wIndex & MAX_ENDPOINTS);
		if (ControlData.DeviceRequest.wIndex & (unsigned char)USB_ENDPOINT_DIRECTION_MASK)
			/* clear TX stall for IN on EPn. */
			D12_SetEndpointStatus(endp*2 + 1, 1);
		else
			/* clear RX stall for OUT on EPn. */
			D12_SetEndpointStatus(endp*2, 1);
		single_transmit(0, 0);
	} 
	else
	{
		stall_ep0();
	}
}

void set_address(void)
{
	D12_SetAddressEnable((unsigned char)(ControlData.DeviceRequest.wValue &
		DEVICE_ADDRESS_MASK), 1);
	single_transmit(0, 0);
}

void get_descriptor(void)
{
	unsigned char bDescriptor = MSB(ControlData.DeviceRequest.wValue);

	if (bDescriptor == USB_DEVICE_DESCRIPTOR_TYPE) 
	{
		code_transmit((unsigned char  *)&DeviceDescr, 
						sizeof(USB_DEVICE_DESCRIPTOR));
	} 
	else if (bDescriptor == USB_CONFIGURATION_DESCRIPTOR_TYPE) 
	{
		code_transmit((unsigned char  *)&ConfigDescr, 
						CONFIG_DESCRIPTOR_LENGTH);
	} 
	else
	{
		stall_ep0();
	}
}

void get_configuration(void)
{
	unsigned char c = bEPPflags.bits.configuration;

	single_transmit(&c, 1);
}

void set_configuration(void)
{
	if (ControlData.DeviceRequest.wValue == 0) {
		/* put device in unconfigured state */
		single_transmit(0, 0);
		DISABLE;
		bEPPflags.bits.configuration = 0;
		ENABLE;
		init_unconfig();
	} else if (ControlData.DeviceRequest.wValue == 1) {
		/* Configure device */
		single_transmit(0, 0);

		init_unconfig();
		init_config();
		
		// Notify user USB endpoint address is assigned.
		Uart_Printf("USB endpoint address is assigned!\nyou can send/receive data now, press any key to quit init.\n");
		
		DISABLE;
		bEPPflags.bits.configuration = 1;
		ENABLE;
	} else
		stall_ep0();
}

void get_interface(void)
{
	unsigned char txdat = 0;        /* Only/Current interface = 0 */
	single_transmit(&txdat, 1);
}

void set_interface(void)
{
	if (ControlData.DeviceRequest.wValue == 0 && 
		ControlData.DeviceRequest.wIndex == 0)
	{
		single_transmit(0, 0);
	}
	else
	{
		stall_ep0();
	}
}

void help_devreq(unsigned char type, unsigned char req)
{
	type >>= 5;

	if(type == USB_STANDARD_REQUEST) 
	{
		USB_DbgPrint(("Request Type = %s, Request = %s.\n", 
			_NAME_USB_REQUEST_TYPE[type],
			_NAME_USB_STANDARD_REQUEST[req]));
	}
	else 
	{
		if(bEPPflags.bits.verbose)
			USB_DbgPrint(("Request Type = %s, bRequest = 0x%x.\n", 
				_NAME_USB_REQUEST_TYPE[type],
				req));
	}
}

///////////////////////////////////////////////////////////////////////////

void stall_ep0(void)
{
	D12_SetEndpointStatus(0, 1);
	D12_SetEndpointStatus(1, 1);
}

void single_transmit(unsigned char * buf, unsigned char len)
{
	if( len <= EP0_PACKET_SIZE) {
		D12_WriteEndpoint(1, buf, len);
	}
}

void code_transmit(unsigned char * pRomData, unsigned short len)
{
	ControlData.wCount = 0;
	if(ControlData.wLength > len)
		ControlData.wLength = len;

	ControlData.pData = pRomData;
	if( ControlData.wLength >= EP0_PACKET_SIZE) {
		D12_WriteEndpoint(1, ControlData.pData, EP0_PACKET_SIZE);
		ControlData.wCount += EP0_PACKET_SIZE;

		DISABLE;
		bEPPflags.bits.control_state = USB_TRANSMIT;
		ENABLE;
	}
	else {
		D12_WriteEndpoint(1, pRomData, ControlData.wLength);
		ControlData.wCount += ControlData.wLength;
		DISABLE;
		bEPPflags.bits.control_state = USB_IDLE;
		ENABLE;
	}
}

void init_unconfig(void)
{
	D12_SetEndpointEnable(0);	/* Disable all endpoints but EPP0. */
}

void init_config(void)
{
	D12_SetEndpointEnable(1);	/* Enable  generic/iso endpoints. */
}

void disconnect_USB(void)
{
	// Initialize D12 configuration
	D12_SetMode(D12_NOLAZYCLOCK, D12_SETTOONE | D12_CLOCK_12M);
}

void connect_USB(void)
{
	// reset event flags
	DISABLE;
	bEPPflags.value = 0;
	ENABLE;

	// V2.1 enable normal+sof interrupt
	//D12_SetDMA(D12_ENDP4INTENABLE | D12_ENDP5INTENABLE);

	// Initialize D12 configuration
	D12_SetMode(D12_NOLAZYCLOCK|D12_SOFTCONNECT, D12_SETTOONE | D12_CLOCK_12M);
}


void reconnect_USB(void)
{
	int clk_cnt;
	
	disconnect_USB();
	clk_cnt = 500000;
	while(clk_cnt--);

	connect_USB();
}

void suspend_change(void)
{
}