pci1.c

基于ecos的redboot

//==========================================================================
//
//        pci1.c
//
//        Test PCI library API
//
//==========================================================================
//####COPYRIGHTBEGIN####
//                                                                          
// -------------------------------------------                              
// The contents of this file are subject to the Red Hat eCos Public License 
// Version 1.1 (the "License"); you may not use this file except in         
// compliance with the License.  You may obtain a copy of the License at    
// http://www.redhat.com/                                                   
//                                                                          
// Software distributed under the License is distributed on an "AS IS"      
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
// License for the specific language governing rights and limitations under 
// the License.                                                             
//                                                                          
// The Original Code is eCos - Embedded Configurable Operating System,      
// released September 30, 1998.                                             
//                                                                          
// The Initial Developer of the Original Code is Red Hat.                   
// Portions created by Red Hat are                                          
// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             
// All Rights Reserved.                                                     
// -------------------------------------------                              
//                                                                          
//####COPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):     jskov
// Contributors:  jskov
// Date:          1999-03-17
// Description:   Simple test that:
//                  Checks API (compile time)
//                  Prints out information about found PCI devices.
//                  Allocates resources to devices (but does not enable
//                  them).
//####DESCRIPTIONEND####

#include <pkgconf/system.h>

#include <cyg/infra/diag.h>             // diag_printf
#include <cyg/infra/testcase.h>         // test macros
#include <cyg/infra/cyg_ass.h>          // assertion macros

// Package requirements
#if defined(CYGPKG_IO_PCI) && defined(CYGPKG_KERNEL)

#include <pkgconf/kernel.h>
#include <pkgconf/io_pci.h>
#include <cyg/io/pci.h>
#include <cyg/hal/hal_arch.h>

// Package option requirements
#if defined(CYGFUN_KERNEL_API_C) && defined(CYG_PCI_PRESENT)

#include <cyg/kernel/kapi.h>

// If the target has limited memory resources, undef the below to
// avoid inclusion of the big PCI code tables.
//
// The header file is created from http://www.yourvote.com/pci
// maintained by Jim Boemler ([e-mail]).
//
// If you have PCI devices not listed in this list, please consider
// registering the codes in the database.
#define USE_PCI_CODE_LIST

#ifdef USE_PCI_CODE_LIST
#include "pcihdr.h"
#endif

// You may want to use this code to do some simple testing of the
// devices on the PCI bus. By enabling the below definition, the
// devices will get PCI IO and MEM access activated after configuration
// so you can play with IO registers and display/set contents of MEM.
#define nENABLE_PCI_DEVICES

unsigned char stack[CYGNUM_HAL_STACK_SIZE_TYPICAL];
cyg_thread thread_data;
cyg_handle_t thread_handle;

void pci_scan( void );

cyg_bool
pci_api_test(int dummy)
{
    cyg_pci_device dev_info;
    cyg_pci_device_id devid = CYG_PCI_NULL_DEVID;
    cyg_bool ret;
    CYG_PCI_ADDRESS64 mem_base = 0;
    CYG_PCI_ADDRESS32 io_base = 0;
    CYG_ADDRWORD vec;
    cyg_uint8 var_uint8;
    cyg_uint16 var_uint16;
    cyg_uint32 var_uint32;


    // Always return...
    if (dummy)
        return true;

    CYG_TEST_FAIL_FINISH("Not reached");

    // PCI library API
    cyg_pci_init();

    cyg_pci_get_device_info (devid, &dev_info);
    cyg_pci_set_device_info (devid, &dev_info);

    ret = cyg_pci_find_device(0, 0, &devid);
    ret |= cyg_pci_find_class(0, &devid);
    ret |= cyg_pci_find_next(devid, &devid);

    ret |= cyg_pci_configure_device(&dev_info);

    cyg_pci_set_memory_base(mem_base);
    cyg_pci_set_io_base(io_base);

    ret |= cyg_pci_allocate_memory(&dev_info, 0, &mem_base);
    ret |= cyg_pci_allocate_io(&dev_info, 0, &io_base);

    ret |= cyg_pci_translate_interrupt(&dev_info, &vec);

    cyg_pci_read_config_uint8(devid, 0, &var_uint8);
    cyg_pci_read_config_uint16(devid, 0, &var_uint16);
    cyg_pci_read_config_uint32(devid, 0, &var_uint32);

    cyg_pci_write_config_uint8(devid, 0, var_uint8);
    cyg_pci_write_config_uint16(devid, 0, var_uint16);
    cyg_pci_write_config_uint32(devid, 0, var_uint32);

    return ret;
}

void
pci_test( void )
{
    cyg_pci_device dev_info;
    cyg_pci_device_id devid;
    CYG_ADDRWORD irq;
    int i;
#ifdef USE_PCI_CODE_LIST
    cyg_bool no_match = false;
    cyg_uint16 vendor, device;
    cyg_uint8  bc, sc, pi;
    PCI_VENTABLE* vtbl;
    PCI_DEVTABLE* dtbl;
    PCI_CLASSCODETABLE* ctbl;
#endif

    pci_api_test(1);

    cyg_pci_init();

    diag_printf( "========== Finding and configuring devices\n" );

    if (cyg_pci_find_next(CYG_PCI_NULL_DEVID, &devid)) {
        do {
            // Get device info
            cyg_pci_get_device_info(devid, &dev_info);


            // Print stuff
            diag_printf("Found device on bus %d, devfn 0x%02x:\n",
                        CYG_PCI_DEV_GET_BUS(devid),
                        CYG_PCI_DEV_GET_DEVFN(devid));

            if (dev_info.command & CYG_PCI_CFG_COMMAND_ACTIVE) {
                diag_printf(" Note that board is active. Probed"
                            " sizes and CPU addresses invalid!\n");
            }

            // Configure the device
            if (cyg_pci_configure_device(&dev_info)) {
                diag_printf(" Device configuration succeeded\n");
#ifdef ENABLE_PCI_DEVICES
                {
                    cyg_uint16 cmd;

                    // Don't use cyg_pci_set_device_info since it clears
                    // some of the fields we want to print out below.
                    cyg_pci_read_config_uint16(dev_info.devid,
                                               CYG_PCI_CFG_COMMAND, &cmd);
                    cmd |= CYG_PCI_CFG_COMMAND_IO|CYG_PCI_CFG_COMMAND_MEMORY;
                    cyg_pci_write_config_uint16(dev_info.devid,
                                                CYG_PCI_CFG_COMMAND, cmd);
                }
                diag_printf(" **** Device IO and MEM access enabled\n");
#endif
            } else {
                diag_printf(" Device configuration failed");
                if (dev_info.command & CYG_PCI_CFG_COMMAND_ACTIVE)
                    diag_printf(" - device already enabled\n");
                else
                    diag_printf(" - resource problem\n");
            }

            diag_printf(" Vendor    0x%04x", dev_info.vendor);
#ifdef USE_PCI_CODE_LIST
            vendor = dev_info.vendor;
            vtbl = PciVenTable;
            for (i = 0; i < PCI_VENTABLE_LEN; i++, vtbl++)
                if (vendor == vtbl->VenId) 
                    break;

            if (i < PCI_VENTABLE_LEN) {
                diag_printf(" [%s][%s]", vtbl->VenShort, vtbl->VenFull);
            } else {
                diag_printf(" [UNKNOWN]");
                no_match = true;
            }
#endif
            diag_printf("\n Device    0x%04x", dev_info.device);
#ifdef USE_PCI_CODE_LIST
            device = dev_info.device;
            dtbl = PciDevTable;
            for (i = 0; i < PCI_DEVTABLE_LEN; i++, dtbl++)
                if (vendor == dtbl->VenId && device == dtbl->DevId)