pcicommon.c

em86xx 完整启动程序,支持网络下载与串通下载

/*****************************************
 Copyright (c) 2003-2004
 Sigma Designs, Inc. All Rights Reserved
 Proprietary and Confidential
 *****************************************/

/* This file is part of the EM86XX boot loader */

/*
 * pcicommon.c
 *
 * by Ho Lee 02/05/2003
 */

#include "config.h"
#include "uart.h"
#include "util.h"
#include "hardware.h"
#include "io.h"
#include "irqs.h"

#include "pcicommon.h"

//
// global variables
//

struct my_pci_op *g_pciop = NULL;

//
// Initialization
//

int pci_init(struct my_pci_op *pop, int verbose)
{
    if (pop) {
        g_pciop = pop;
        g_pciop->init(verbose);
        return 0;
    } else
        return 1;
}

//
// Basic
//

int pci_info(void)
{
    if (g_pciop && g_pciop->info)
        return g_pciop->info();
    
    return 1;
}

unsigned int pci_select(int idsel)
{
    if (g_pciop && g_pciop->select)
        return g_pciop->select(idsel);
    
    return 0;
}

//
// Bus address translation
//

unsigned int virt_to_bus(unsigned int virt)
{
    return (g_pciop && g_pciop->virt_to_bus) ? g_pciop->virt_to_bus(virt) : virt;
}

unsigned int bus_to_virt(unsigned int bus)
{
    return (g_pciop && g_pciop->bus_to_virt) ? g_pciop->bus_to_virt(bus) : bus;
}

//
// primitive PCI configuration I/O
//

#define PCI_READ_CONFIG_X(x, type, name) \
    int pci_read_config_##name(unsigned int addr, unsigned type *data) \
    { \
        return (g_pciop && g_pciop->read_config_##name) ? g_pciop->read_config_##name(addr, data) : 1; \
    }
    
#define PCI_WRITE_CONFIG_X(x, type, name) \
    int pci_write_config_##name(unsigned int addr, unsigned int data) \
    { \
        return (g_pciop && g_pciop->write_config_##name) ? g_pciop->write_config_##name(addr, data) : 1; \
    }

PCI_READ_CONFIG_X(b, char, byte)
PCI_READ_CONFIG_X(w, short, word)
PCI_READ_CONFIG_X(l, int, dword)

PCI_WRITE_CONFIG_X(b, char, byte)
PCI_WRITE_CONFIG_X(w, short, word)
PCI_WRITE_CONFIG_X(l, int, dword)

//
// primitive PCI I/O Access
//
    
#define PCI_IN_X(x, type, name) \
    unsigned type pci_in##x(unsigned int addr) \
    { \
        return (g_pciop && g_pciop->in_##name) ? g_pciop->in_##name(addr) : (unsigned type) -1; \
    }
    
#define PCI_OUT_X(x, type, name) \
    void pci_out##x(unsigned int data, unsigned int addr) \
    { \
        if (g_pciop && g_pciop->out_##name) \
            g_pciop->out_##name(data, addr); \
    }

PCI_IN_X(b, char, byte)
PCI_IN_X(w, short, word)
PCI_IN_X(l, int, dword)

PCI_OUT_X(b, char, byte)
PCI_OUT_X(w, short, word)
PCI_OUT_X(l, int, dword)

//
// primitive PCI Memory Access
//
    
#define PCI_READ_X(x, type, name) \
    unsigned type pci_read##x(unsigned int addr) \
    { \
        return (g_pciop && g_pciop->read_##name) ? g_pciop->read_##name(addr) : (unsigned type) -1; \
    }
    
#define PCI_WRITE_X(x, type, name) \
    void pci_write##x(unsigned int data, unsigned int addr) \
    { \
        if (g_pciop && g_pciop->write_##name) \
            g_pciop->write_##name(data, addr); \
    }

PCI_READ_X(b, char, byte)
PCI_READ_X(w, short, word)
PCI_READ_X(l, int, dword)

PCI_WRITE_X(b, char, byte)
PCI_WRITE_X(w, short, word)
PCI_WRITE_X(l, int, dword)

//
// PCI bus scan & dump
// 
// restriction : This code does not support multi-function device
//

// scan every devices on the bus, and display the information of each device
int pci_scan(void)
{
    int i;

    if (g_pciop == NULL)
        return -1;

    // Agent detection
    for (i = g_pciop->idsel_start; i <= g_pciop->idsel_end; ++i) {
        if (pci_select(i) != 0)
            pci_dump_idsel(i, 0);
    }

    return 0;
}

struct my_pci_dev *pci_get_info(struct my_pci_dev *pdev, int readonly)
{
    int i;
    unsigned char hdr_type, latency, cacheline, irqpin, irqline;
    unsigned short cmd, status;
    unsigned int vendor_id, device_id, class, rev, romaddr, baseaddr, buses;
    
    if (g_pciop == NULL)
        return NULL;

    g_pciop->read_config_byte(PCI_HEADER_TYPE, &hdr_type);
    g_pciop->read_config_dword(PCI_VENDOR_ID, &vendor_id);
    if (vendor_id == 0xffffffff || vendor_id == 0x00000000 || vendor_id == 0x0000ffff)
        return NULL;
    
    pdev->is_normal = ((hdr_type & 0x7f) == PCI_HEADER_TYPE_NORMAL) ? 1 : 0;
    pdev->is_bridge = ((hdr_type & 0x7f) == PCI_HEADER_TYPE_BRIDGE) ? 1 : 0;
    pdev->is_cardbus = ((hdr_type & 0x7f) == PCI_HEADER_TYPE_CARDBUS) ? 1 : 0;
    
    device_id = (vendor_id >> 16) & 0xffff;
    vendor_id &= 0xffff;
    
    g_pciop->read_config_word(PCI_COMMAND, &cmd);
    g_pciop->read_config_word(PCI_STATUS, &status);
    
    g_pciop->read_config_dword(PCI_CLASS_REVISION, &class);
    rev = class & 0xff;
    class >>= 8;

    g_pciop->read_config_byte(PCI_LATENCY_TIMER, &latency);
    g_pciop->read_config_byte(PCI_CACHE_LINE_SIZE, &cacheline);
    
    g_pciop->read_config_byte(PCI_INTERRUPT_PIN, &irqpin);
    g_pciop->read_config_byte(PCI_INTERRUPT_LINE, &irqline);
    g_pciop->read_config_dword(PCI_ROM_ADDRESS, &romaddr);

    g_pciop->read_config_dword(PCI_PRIMARY_BUS, &buses);
    
    pdev->vendor_id = vendor_id;
    pdev->device_id = device_id;
    pdev->cmd = cmd;
    pdev->status = status;
    pdev->class = class;

    pdev->progIF = class & 0xff;
    pdev->subclass = (class >> 8) & 0xff;
    pdev->classcode = (class >> 16) & 0xff;
    
    pdev->rev = rev;
    pdev->hdr_type = hdr_type;
    pdev->latency = latency;
    pdev->cacheline = cacheline;

    pdev->irqpin = irqpin;
    pdev->irqline = irqline;
    pdev->romaddr = romaddr;
    
    pdev->buses = buses;
    pdev->primary_bus = buses & 0xff;
    pdev->secondary_bus = (buses >> 8) & 0xff;
    pdev->subordinate_bus = (buses >> 16) & 0xff;
    
    for (i = 0; i < 6; ++i) {
        g_pciop->read_config_dword(PCI_BASE_ADDRESS_0 + 4 * i, &baseaddr);
        pdev->resource[i].isio = -1;
        pdev->resource[i].start = pdev->base_addr[i] = baseaddr;
        pdev->resource[i].size = 0;
        if (baseaddr != 0) {
            pdev->resource[i].isio = baseaddr & PCI_BASE_ADDRESS_SPACE_IO;
            pdev->resource[i].start = baseaddr & (pdev->resource[i].isio ? PCI_BASE_ADDRESS_IO_MASK : PCI_BASE_ADDRESS_MEM_MASK);
        }
            
        if (!readonly) {
            g_pciop->write_config_dword(PCI_BASE_ADDRESS_0 + 4 * i, 0xffffffff);
            g_pciop->read_config_dword(PCI_BASE_ADDRESS_0 + 4 * i, &baseaddr);
            if (baseaddr != 0) {
                baseaddr &= (pdev->resource[i].isio ? PCI_BASE_ADDRESS_IO_MASK : PCI_BASE_ADDRESS_MEM_MASK);
                pdev->resource[i].size = ~baseaddr + 1;
            }
            g_pciop->write_config_dword(PCI_BASE_ADDRESS_0 + 4 * i, pdev->base_addr[i]);
        } 
    }
    
    if ((pdev->class >> 8) != PCI_CLASS_BRIDGE_PCI) 
        pdev->is_bridge = 0;

    return pdev;
}

static char *s_strType[] = {
    "Normal", "Brdige", "Cardbus" };

static char *s_strCmd[] = {
    "IO Enable", "Memory Enable", "Master", "Special", 
    "Invalidate", "VGA Palette", "Parity", "Wait", 
    "SERR", "Fast Back" };
static char *s_strStatus[] = {
    "", "", "", "",
    "CAP List", "66MHz", "UDF", "Fast Back" };
static char *s_strClassCode[] = {
    "Reserved", "Disk", "Network", "Display",
    "Multimedia", "Memory", "Bridge", "Communication",
    "System Peripheral", "Input", "Docking station", "CPU",
    "Serial Bus" };
static char *s_strIoType[] = {
    "Memory", "I/O" };
static char *s_strMemType[] = {
    "32 bit", "below 1M", "64 bit" };
static char *s_strPrefetch[] = {
    "Nonprefetchable", "Prefetchable" };
#define INFOSTR(strarray, idx)  ((idx < (sizeof strarray / sizeof strarray[0])) ? strarray[idx] : "Unknown")

#define INFOSTRBIT(strarray, data, max) \
    for (i = 0, count = 0; data > 0 && (max <= 0 || i < max); ++i, data >>= 1) { \
        if (data & 1) { \
            if (count > 0) \
                uart_printf(", "); \
            uart_printf("%s", INFOSTR(strarray, i)); \
            ++count; \
        } \
    }
    
void pci_dump(struct my_pci_dev *pdev)
{
    int i, count, basecount;
    unsigned int iotype, memtype, prefetch;

    if (g_pciop == NULL)
        return;

    uart_printf("PCI ID select %d:\n", pdev->idsel);

    // Vendor ID & Device ID
    
    uart_printf("  Vendor ID = %04x, Device ID = %04x, Type = %02x (%s)\n",
        pdev->vendor_id, pdev->device_id, pdev->hdr_type, INFOSTR(s_strType, pdev->hdr_type));

    // Command & Status
    
    uart_printf("  Command = %04x (", pdev->cmd);
    INFOSTRBIT(s_strCmd, pdev->cmd, 0);
    uart_printf(")\n");
    uart_printf("  Status = %04x (", pdev->status);
    INFOSTRBIT(s_strStatus, pdev->status, 8);
    uart_printf(")\n");
    
    // Class 
    
    uart_printf("  Class = %06x (", pdev->class);
    uart_printf("Class = %s)\n", INFOSTR(s_strClassCode, pdev->classcode));

    // Revision, Latency Timer, Cache Line Size
    
    uart_printf("  Revision = %02x, Latency Timer = %02x, Cache Line Size = %02x\n", 
        pdev->rev, pdev->latency, pdev->cacheline);

    // Interrupt

    if (pdev->is_normal) 
        uart_printf("  Interrupt Line = %02x, Interrupt Pin = %02x\n",
            pdev->irqline, pdev->irqpin);
    
    // Base address
    
    switch (pdev->hdr_type) {
    case PCI_HEADER_TYPE_NORMAL : 
        basecount = 6;
        break;
    case PCI_HEADER_TYPE_BRIDGE : 
        basecount = 2;
        break;
    case PCI_HEADER_TYPE_CARDBUS : 
        basecount = 1;
        break;
    default : 
        basecount = 6;
        break;