usbpcistub.c

vxworks下usb host 驱动

/* usbPciStub.c - System-specific PCI Functions */

/* Copyright 2000 Wind River Systems, Inc. */

/*
Modification history
--------------------
01a,22nov00,wef  First, created from 01h of the mcp750 bsp stub
*/

/*
DESCRIPTION

This file defines a skeleton of functions to be used for accessing 
the PCI bus capabilities.  These functions allow PCI device drivers 
to be written independent of the underlying O/S's PCI access mechanisms.

The name of each function in this group begins with "usb" to represent
"Device Driver Services."
*/

/* Includes */

#include "vxWorks.h"

#include "string.h"

#include "sysLib.h"
#include "cacheLib.h"

#include "iv.h"
#include "intLib.h"

#include "drv/pci/pciConfigLib.h"   /* VxWorks PCI funcs */

#include "usb/usbPlatform.h"		/* Basic definitions */
#include "usb/usbPciLib.h"			/* Our API */



/*  #error "usbPciStub.c: Customize the USB PCI macros before first use" */

/*
 * TODO: Read and update this stub file to customize it for this
 * BSP.  Delete the #error statement above afterwards. Look for
 * TODO references in this file.
 */

/*
 * TODO: Adjust the 3 macros below as needed.
 *
 * USB_PCI_IO_OFFSET is the offset between a physical PCI IO address
 * and the virtual address used to access it.  In this example code,
 * PCI IO addresses map one-to-one with virtual IO addresses used
 * by the sysInByte() and sysOutByte() routines.  In a memory
 * mapped system it would be very unlikely for this value to be zero.
 *
 * USB_PCI_MEMIO_OFFSET is the offset between Memory IO (non prefetch)
 * PCI physical addresses and the local virtual address that corresponds
 * to it.
 *
 * USB_PCI_MEM_OFFSET is the offset between Memory (prefetchable) PCI
 * physical addresses and the local virtual address that corresponds
 * to it.
 */

#ifdef INCLUDE_USB_PCI
#define PCI_IO_OFFSET		PLB_PCI_IO_REGION_2_START
#define PCI_MEMIO_OFFSET	PLB_PCI_IO_REGION_1_START
#define PCI_MEM_OFFSET		PCI_MEMORY_START
#else
#define PCI_IO_OFFSET		0
#define PCI_MEMIO_OFFSET	0
#define PCI_MEM_OFFSET		0
#endif

/*
 * TODO: Define the following macros to describe how to connect
 * and disconnect interrupts on your hardware.  This should
 * normally be mapped to the pciIntLib functions.
 */

/* Interrupt enable/disable mappings */

#define USB_INT_CONNECT(intNo, func, param) \
    pciIntConnect (INUM_TO_IVEC(intNo), (VOIDFUNCPTR) func, (int) param)

#define USB_INT_DISCONNECT(intNo, func, param) \
    pciIntDisconnect (INUM_TO_IVEC(intNo), (VOIDFUNCPTR) func)

#define USB_INT_ENABLE(i)	intEnable (i)
#define USB_INT_DISABLE(i)	intDisable (i)

/*
 * TODO: Define the following macros to read/write data
 * to/from PCI I/O space as needed.  This may be I/O
 * mapped accesses or memory accesses.  This example
 * code assumes I/O mapped accesses using sysInByte
 * functions provided by the BSP sysLib module.
 */

/* Map I/O functions to underlying system functions. */

#define	USB_PCI_IN_BYTE(a)	sysInByte ((a) + PCI_IO_OFFSET)
#define	USB_PCI_IN_WORD(a)	sysInWord ((a) + PCI_IO_OFFSET)
#define	USB_PCI_IN_DWORD(a)	sysInLong ((a) + PCI_IO_OFFSET)
#define	USB_PCI_OUT_BYTE(a,v)	sysOutByte ((a) + PCI_IO_OFFSET, (v))
#define	USB_PCI_OUT_WORD(a,v)	sysOutWord ((a) + PCI_IO_OFFSET, (v))
#define	USB_PCI_OUT_DWORD(a,v)	sysOutLong ((a) + PCI_IO_OFFSET, (v))

/* code tracks usage count for interrupts 0..USB_MAX_INT_NO-1. */

#define USB_MAX_INT_NO		16




/* TODO: Leave the code below this point alone. */




/* locals */

LOCAL UINT16 intUsage [USB_MAX_INT_NO] = {0};


#ifdef INCLUDE_USB_PCI
/***************************************************************************
*
* usbPciClassFind - Locates PCI devices by class.
*
* A caller uses this function to locate a PCI device by its PCI class.
* The caller must specify the <pciClass>, <subClass>, and <pgmIf> for the
* device being sought.	The function returns the first matching device
* for <index> = 0, the second for <index> = 1, and so forth.  The
* bus number, device number, and function number for the matching device 
* are returned in the <pBusNo>, <pDeviceNo>, and <pFuncNo> buffers provided 
* by the caller. 
*
*
* RETURNS:
* Returns TRUE if matching device found, FALSE if device not found.
*/

BOOL usbPciClassFind
    (
    UINT8 pciClass,		/* PCI device class */
    UINT8 subClass,		/* PCI device sub-class */
    UINT8 pgmIf,		/* Programming interface */
    UINT16 index,		/* Caller wants nth matching dev */
    pUINT8 pBusNo,		/* Bus number of matching dev */
    pUINT8 pDeviceNo,		/* Device number of matching dev */
    pUINT8 pFuncNo		/* Function number of matching dev */
    )
    {
    int intBusNo;		/* VxWorks returns "int" values */
    int intDeviceNo;
    int intFuncNo;

    
    /* Use the VxWorks PCI config. library to find a device within the
    specified class. */

    if (pciFindClass ((pciClass << 16) | (subClass << 8) | pgmIf, index,
	&intBusNo, &intDeviceNo, &intFuncNo) != OK)
	{
	return FALSE;
	}
    else
	{
	if (pBusNo)
	     *pBusNo = (UINT8) intBusNo;
	if (pDeviceNo)
	     *pDeviceNo = (UINT8) intDeviceNo;
	if (pFuncNo)
	     *pFuncNo = (UINT8) intFuncNo;
	}

    return TRUE;
    }


/***************************************************************************
*
* usbPciByteGet - Returns a UINT8 configuration value
*
* This function returns the UINT8 value at offset <regOffset> from 
* the PCI configuration space of the device identified by <busNo>, 
* <deviceNo>, and <funcNo>.
*
* RETURNS: UINT8 value read from device configuration space
*/

UINT8 usbPciByteGet 
    (
    UINT8 busNo,		/* Bus number of device */
    UINT8 deviceNo,		/* Device number of device */
    UINT8 funcNo,		/* Function number of device */
    UINT16 regOffset		/* Offset into PCI config space */
    )
    {
    UINT8 value;

    if (pciConfigInByte (busNo, deviceNo, funcNo, regOffset, &value) != OK)
	return 0;

    return value;
    }


/***************************************************************************
*
* usbPciWordGet - Returns a UINT16 configuration value
*
* This function returns the UINT16 value at offset <regOffset> from 
* the PCI configuration space of the device identified by <busNo>, 
* <deviceNo>, and <funcNo>.
*
* NOTE: This function adjusts for big vs. little endian environments.
*
* RETURNS: UINT16 value read from device configuration space
*/

UINT32 usbPciWordGet
    (
    UINT8 busNo,		/* Bus number of device */
    UINT8 deviceNo,		/* Device number of device */
    UINT8 funcNo,		/* Function number of device */
    UINT16 regOffset		/* Offset into PCI config space */
    )
    {
    UINT16 value;

    if (pciConfigInWord (busNo, deviceNo, funcNo, regOffset, &value) != OK)
	return 0;

    return value;
    }


/***************************************************************************
*
* usbPciDwordGet - Returns a UINT32 configuration value
*
* This function returns the UINT32 value at offset <regOffset> from 
* the PCI configuration space of the device identified by <busNo>, 
* <deviceNo>, and <funcNo>.
*
* NOTE: This function adjusts for big vs. little endian environments.
*
* RETURNS: UINT32 value read from device configuration space
*/

UINT32 usbPciDwordGet
    (
    UINT8 busNo,		/* Bus number of device */
    UINT8 deviceNo,		/* Device number of device */
    UINT8 funcNo,		/* Function number of device */
    UINT16 regOffset		/* Offset into PCI config space */
    )
    {
    UINT32 value;

    if (pciConfigInLong (busNo, deviceNo, funcNo, regOffset, &value) != OK)
	return 0;

    return value;
    }


/***************************************************************************
*
* usbPciConfigHeaderGet - Reads a device's PCI configuration header
*
* This function reads the PCI configuration header for the device
* identified by <busNo>, <deviceNo>, and <funcNo>.  The configuration
* header is stored in the <pCfgHdr> buffer provided by the caller.
*
* This function initializes the <pCfgHdr> structure to zeros.  Any 
* fields which cannot be read from the device's configuration header 
* will remain zero upon return.  This function does not attempt to read
* fields defined as "reserved" in the PCI configuration header.
*
* RETURNS: N/A
*/

VOID usbPciConfigHeaderGet
    (
    UINT8 busNo,		/* Bus number of device */
    UINT8 deviceNo,		/* Device number of device */
    UINT8 funcNo,		/* Function number of device */
    pPCI_CFG_HEADER pCfgHdr	/* Buffer provided by caller */
    )
    {
    int i;

    /* Do nothing if CfgHdr is NULL */

    if (pCfgHdr == NULL)
	return;


    /* Initialize the buffer to zeros. */

    memset (pCfgHdr, 0, sizeof (*pCfgHdr));


    /* Read and store each field in the PCI configuration header. */

    pCfgHdr->vendorId	= usbPciWordGet (busNo, deviceNo, funcNo, PCI_CFG_VENDOR_ID);
    pCfgHdr->deviceId	= usbPciWordGet (busNo, deviceNo, funcNo, PCI_CFG_DEVICE_ID);
    pCfgHdr->command	= usbPciWordGet (busNo, deviceNo, funcNo, PCI_CFG_COMMAND);
    pCfgHdr->status	= usbPciWordGet (busNo, deviceNo, funcNo, PCI_CFG_STATUS);
    pCfgHdr->revisionId = usbPciByteGet (busNo, deviceNo, funcNo, PCI_CFG_REVISION);
    pCfgHdr->pgmIf	= usbPciByteGet (busNo, deviceNo, funcNo, PCI_CFG_PROGRAMMING_IF);
    pCfgHdr->subClass	= usbPciByteGet (busNo, deviceNo, funcNo, PCI_CFG_SUBCLASS);
    pCfgHdr->pciClass	= usbPciByteGet (busNo, deviceNo, funcNo, PCI_CFG_CLASS);
    pCfgHdr->cacheLineSize = usbPciByteGet (busNo, deviceNo, funcNo, PCI_CFG_CACHE_LINE_SIZE);
    pCfgHdr->latencyTimer = usbPciByteGet (busNo, deviceNo, funcNo, PCI_CFG_LATENCY_TIMER);
    pCfgHdr->headerType = usbPciByteGet (busNo, deviceNo, funcNo, PCI_CFG_HEADER_TYPE);
    pCfgHdr->bist	= usbPciByteGet (busNo, deviceNo, funcNo, PCI_CFG_BIST);

    for (i = 0; i < PCI_CFG_NUM_BASE_REG; i++)
	pCfgHdr->baseReg [i] = usbPciDwordGet (busNo, deviceNo, funcNo, 
	    PCI_CFG_BASE_ADDRESS_0 + i * sizeof (UINT32));

    pCfgHdr->romBase	= usbPciDwordGet (busNo, deviceNo, funcNo, PCI_CFG_EXPANSION_ROM);
    pCfgHdr->intLine	= usbPciByteGet (busNo, deviceNo, funcNo, PCI_CFG_DEV_INT_LINE);
    pCfgHdr->intPin	= usbPciByteGet (busNo, deviceNo, funcNo, PCI_CFG_DEV_INT_PIN);
    pCfgHdr->minGrant	= usbPciByteGet (busNo, deviceNo, funcNo, PCI_CFG_MIN_GRANT);
    pCfgHdr->maxLatency = usbPciByteGet (busNo, deviceNo, funcNo, PCI_CFG_MAX_LATENCY);
    }


/***************************************************************************
*
* usbPciByteIn - input a byte from PCI I/O space