fixup-lemote2f.c

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/*
 * Copyright (C) 2008 Lemote Technology
 * Copyright (C) 2004 ICT CAS
 * Author: Li xiaoyu, [email protected]
 *
 * Copyright (C) 2007 Lemote, Inc.
 * Author: Fuxin Zhang, [email protected]
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 */
#include <linux/init.h>
#include <linux/pci.h>

#include <loongson.h>
#include <cs5536/cs5536.h>
#include <cs5536/cs5536_pci.h>

/* PCI interrupt pins
 *
 * These should not be changed, or you should consider loongson2f interrupt
 * register and your pci card dispatch
 */

#define PCIA        4
#define PCIB        5
#define PCIC        6
#define PCID        7

/* all the pci device has the PCIA pin, check the datasheet. */
static char irq_tab[][5] __initdata = {
    /*      INTA    INTB    INTC    INTD */
    {0, 0, 0, 0, 0},    /*  11: Unused */
    {0, 0, 0, 0, 0},    /*  12: Unused */
    {0, 0, 0, 0, 0},    /*  13: Unused */
    {0, 0, 0, 0, 0},    /*  14: Unused */
    {0, 0, 0, 0, 0},    /*  15: Unused */
    {0, 0, 0, 0, 0},    /*  16: Unused */
    {0, PCIA, 0, 0, 0}, /*  17: RTL8110-0 */
    {0, PCIB, 0, 0, 0}, /*  18: RTL8110-1 */
    {0, PCIC, 0, 0, 0}, /*  19: SiI3114 */
    {0, PCID, 0, 0, 0}, /*  20: 3-ports nec usb */
    {0, PCIA, PCIB, PCIC, PCID},    /*  21: PCI-SLOT */
    {0, 0, 0, 0, 0},    /*  22: Unused */
    {0, 0, 0, 0, 0},    /*  23: Unused */
    {0, 0, 0, 0, 0},    /*  24: Unused */
    {0, 0, 0, 0, 0},    /*  25: Unused */
    {0, 0, 0, 0, 0},    /*  26: Unused */
    {0, 0, 0, 0, 0},    /*  27: Unused */
};

int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
    int virq;

    if ((PCI_SLOT(dev->devfn) != PCI_IDSEL_CS5536)
        && (PCI_SLOT(dev->devfn) < 32)) {
        virq = irq_tab[slot][pin];
        printk(KERN_INFO "slot: %d, pin: %d, irq: %d\n", slot, pin,
               virq + LOONGSON_IRQ_BASE);
        if (virq != 0)
            return LOONGSON_IRQ_BASE + virq;
        else
            return 0;
    } else if (PCI_SLOT(dev->devfn) == PCI_IDSEL_CS5536) {  /*  cs5536 */
        switch (PCI_FUNC(dev->devfn)) {
        case 2:
            pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
                          CS5536_IDE_INTR);
            return CS5536_IDE_INTR; /*  for IDE */
        case 3:
            pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
                          CS5536_ACC_INTR);
            return CS5536_ACC_INTR; /*  for AUDIO */
        case 4: /*  for OHCI */
        case 5: /*  for EHCI */
        case 6: /*  for UDC */
        case 7: /*  for OTG */
            pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
                          CS5536_USB_INTR);
            return CS5536_USB_INTR;
        }
        return dev->irq;
    } else {
        printk(KERN_INFO " strange pci slot number.\n");
        return 0;
    }
}

/* Do platform specific device initialization at pci_enable_device() time */
int pcibios_plat_dev_init(struct pci_dev *dev)
{
    return 0;
}

/* CS5536 SPEC. fixup */
static void __devinit loongson_cs5536_isa_fixup(struct pci_dev *pdev)
{
    /* the uart1 and uart2 interrupt in PIC is enabled as default */
    pci_write_config_dword(pdev, PCI_UART1_INT_REG, 1);
    pci_write_config_dword(pdev, PCI_UART2_INT_REG, 1);
}

static void __devinit loongson_cs5536_ide_fixup(struct pci_dev *pdev)
{
    /* setting the mutex pin as IDE function */
    pci_write_config_dword(pdev, PCI_IDE_CFG_REG,
                   CS5536_IDE_FLASH_SIGNATURE);
}

static void __devinit loongson_cs5536_acc_fixup(struct pci_dev *pdev)
{
    /* enable the AUDIO interrupt in PIC  */
    pci_write_config_dword(pdev, PCI_ACC_INT_REG, 1);

    pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xc0);
}

static void __devinit loongson_cs5536_ohci_fixup(struct pci_dev *pdev)
{
    /* enable the OHCI interrupt in PIC */
    /* THE OHCI, EHCI, UDC, OTG are shared with interrupt in PIC */
    pci_write_config_dword(pdev, PCI_OHCI_INT_REG, 1);
}

static void __devinit loongson_cs5536_ehci_fixup(struct pci_dev *pdev)
{
    u32 hi, lo;

    /* Serial short detect enable */
    _rdmsr(USB_MSR_REG(USB_CONFIG), &hi, &lo);
    _wrmsr(USB_MSR_REG(USB_CONFIG), (1 << 1) | (1 << 3), lo);

    /* setting the USB2.0 micro frame length */
    pci_write_config_dword(pdev, PCI_EHCI_FLADJ_REG, 0x2000);
}

static void __devinit loongson_nec_fixup(struct pci_dev *pdev)
{
    unsigned int val;

    pci_read_config_dword(pdev, 0xe0, &val);
    /* Only 2 port be used */
    pci_write_config_dword(pdev, 0xe0, (val & ~3) | 0x2);
}

DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA,
             loongson_cs5536_isa_fixup);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_OHC,
             loongson_cs5536_ohci_fixup);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_EHC,
             loongson_cs5536_ehci_fixup);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO,
             loongson_cs5536_acc_fixup);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_IDE,
             loongson_cs5536_ide_fixup);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
             loongson_nec_fixup);