226 lines
5.9 KiB
C
226 lines
5.9 KiB
C
/*
|
|
* Copyright (C) 2004 ICT CAS
|
|
* Author: Li xiaoyu, ICT CAS
|
|
* lixy@ict.ac.cn
|
|
*
|
|
* Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
|
|
* Author: Fuxin Zhang, zhangfx@lemote.com
|
|
*
|
|
* 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>
|
|
|
|
/* South bridge slot number is set by the pci probe process */
|
|
static u8 sb_slot = 5;
|
|
|
|
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
|
|
{
|
|
int irq = 0;
|
|
|
|
if (slot == sb_slot) {
|
|
switch (PCI_FUNC(dev->devfn)) {
|
|
case 2:
|
|
irq = 10;
|
|
break;
|
|
case 3:
|
|
irq = 11;
|
|
break;
|
|
case 5:
|
|
irq = 9;
|
|
break;
|
|
}
|
|
} else {
|
|
irq = LOONGSON_IRQ_BASE + 25 + pin;
|
|
}
|
|
return irq;
|
|
|
|
}
|
|
|
|
/* Do platform specific device initialization at pci_enable_device() time */
|
|
int pcibios_plat_dev_init(struct pci_dev *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void __init loongson2e_nec_fixup(struct pci_dev *pdev)
|
|
{
|
|
unsigned int val;
|
|
|
|
/* Configures port 1, 2, 3, 4 to be validate*/
|
|
pci_read_config_dword(pdev, 0xe0, &val);
|
|
pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x4);
|
|
|
|
/* System clock is 48-MHz Oscillator. */
|
|
pci_write_config_dword(pdev, 0xe4, 1 << 5);
|
|
}
|
|
|
|
static void __init loongson2e_686b_func0_fixup(struct pci_dev *pdev)
|
|
{
|
|
unsigned char c;
|
|
|
|
sb_slot = PCI_SLOT(pdev->devfn);
|
|
|
|
printk(KERN_INFO "via686b fix: ISA bridge\n");
|
|
|
|
/* Enable I/O Recovery time */
|
|
pci_write_config_byte(pdev, 0x40, 0x08);
|
|
|
|
/* Enable ISA refresh */
|
|
pci_write_config_byte(pdev, 0x41, 0x01);
|
|
|
|
/* disable ISA line buffer */
|
|
pci_write_config_byte(pdev, 0x45, 0x00);
|
|
|
|
/* Gate INTR, and flush line buffer */
|
|
pci_write_config_byte(pdev, 0x46, 0xe0);
|
|
|
|
/* Disable PCI Delay Transaction, Enable EISA ports 4D0/4D1. */
|
|
/* pci_write_config_byte(pdev, 0x47, 0x20); */
|
|
|
|
/*
|
|
* enable PCI Delay Transaction, Enable EISA ports 4D0/4D1.
|
|
* enable time-out timer
|
|
*/
|
|
pci_write_config_byte(pdev, 0x47, 0xe6);
|
|
|
|
/*
|
|
* enable level trigger on pci irqs: 9,10,11,13
|
|
* important! without this PCI interrupts won't work
|
|
*/
|
|
outb(0x2e, 0x4d1);
|
|
|
|
/* 512 K PCI Decode */
|
|
pci_write_config_byte(pdev, 0x48, 0x01);
|
|
|
|
/* Wait for PGNT before grant to ISA Master/DMA */
|
|
pci_write_config_byte(pdev, 0x4a, 0x84);
|
|
|
|
/*
|
|
* Plug'n'Play
|
|
*
|
|
* Parallel DRQ 3, Floppy DRQ 2 (default)
|
|
*/
|
|
pci_write_config_byte(pdev, 0x50, 0x0e);
|
|
|
|
/*
|
|
* IRQ Routing for Floppy and Parallel port
|
|
*
|
|
* IRQ 6 for floppy, IRQ 7 for parallel port
|
|
*/
|
|
pci_write_config_byte(pdev, 0x51, 0x76);
|
|
|
|
/* IRQ Routing for serial ports (take IRQ 3 and 4) */
|
|
pci_write_config_byte(pdev, 0x52, 0x34);
|
|
|
|
/* All IRQ's level triggered. */
|
|
pci_write_config_byte(pdev, 0x54, 0x00);
|
|
|
|
/* route PIRQA-D irq */
|
|
pci_write_config_byte(pdev, 0x55, 0x90); /* bit 7-4, PIRQA */
|
|
pci_write_config_byte(pdev, 0x56, 0xba); /* bit 7-4, PIRQC; */
|
|
/* 3-0, PIRQB */
|
|
pci_write_config_byte(pdev, 0x57, 0xd0); /* bit 7-4, PIRQD */
|
|
|
|
/* enable function 5/6, audio/modem */
|
|
pci_read_config_byte(pdev, 0x85, &c);
|
|
c &= ~(0x3 << 2);
|
|
pci_write_config_byte(pdev, 0x85, c);
|
|
|
|
printk(KERN_INFO"via686b fix: ISA bridge done\n");
|
|
}
|
|
|
|
static void __init loongson2e_686b_func1_fixup(struct pci_dev *pdev)
|
|
{
|
|
printk(KERN_INFO"via686b fix: IDE\n");
|
|
|
|
/* Modify IDE controller setup */
|
|
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 48);
|
|
pci_write_config_byte(pdev, PCI_COMMAND,
|
|
PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
|
|
PCI_COMMAND_MASTER);
|
|
pci_write_config_byte(pdev, 0x40, 0x0b);
|
|
/* legacy mode */
|
|
pci_write_config_byte(pdev, 0x42, 0x09);
|
|
|
|
#if 1/* play safe, otherwise we may see notebook's usb keyboard lockup */
|
|
/* disable read prefetch/write post buffers */
|
|
pci_write_config_byte(pdev, 0x41, 0x02);
|
|
|
|
/* use 3/4 as fifo thresh hold */
|
|
pci_write_config_byte(pdev, 0x43, 0x0a);
|
|
pci_write_config_byte(pdev, 0x44, 0x00);
|
|
|
|
pci_write_config_byte(pdev, 0x45, 0x00);
|
|
#else
|
|
pci_write_config_byte(pdev, 0x41, 0xc2);
|
|
pci_write_config_byte(pdev, 0x43, 0x35);
|
|
pci_write_config_byte(pdev, 0x44, 0x1c);
|
|
|
|
pci_write_config_byte(pdev, 0x45, 0x10);
|
|
#endif
|
|
|
|
printk(KERN_INFO"via686b fix: IDE done\n");
|
|
}
|
|
|
|
static void __init loongson2e_686b_func2_fixup(struct pci_dev *pdev)
|
|
{
|
|
/* irq routing */
|
|
pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, 10);
|
|
}
|
|
|
|
static void __init loongson2e_686b_func3_fixup(struct pci_dev *pdev)
|
|
{
|
|
/* irq routing */
|
|
pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, 11);
|
|
}
|
|
|
|
static void __init loongson2e_686b_func5_fixup(struct pci_dev *pdev)
|
|
{
|
|
unsigned int val;
|
|
unsigned char c;
|
|
|
|
/* enable IO */
|
|
pci_write_config_byte(pdev, PCI_COMMAND,
|
|
PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
|
|
PCI_COMMAND_MASTER);
|
|
pci_read_config_dword(pdev, 0x4, &val);
|
|
pci_write_config_dword(pdev, 0x4, val | 1);
|
|
|
|
/* route ac97 IRQ */
|
|
pci_write_config_byte(pdev, 0x3c, 9);
|
|
|
|
pci_read_config_byte(pdev, 0x8, &c);
|
|
|
|
/* link control: enable link & SGD PCM output */
|
|
pci_write_config_byte(pdev, 0x41, 0xcc);
|
|
|
|
/* disable game port, FM, midi, sb, enable write to reg2c-2f */
|
|
pci_write_config_byte(pdev, 0x42, 0x20);
|
|
|
|
/* we are using Avance logic codec */
|
|
pci_write_config_word(pdev, 0x2c, 0x1005);
|
|
pci_write_config_word(pdev, 0x2e, 0x4710);
|
|
pci_read_config_dword(pdev, 0x2c, &val);
|
|
|
|
pci_write_config_byte(pdev, 0x42, 0x0);
|
|
}
|
|
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686,
|
|
loongson2e_686b_func0_fixup);
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1,
|
|
loongson2e_686b_func1_fixup);
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_2,
|
|
loongson2e_686b_func2_fixup);
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_3,
|
|
loongson2e_686b_func3_fixup);
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5,
|
|
loongson2e_686b_func5_fixup);
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
|
|
loongson2e_nec_fixup);
|