e2fee5723b
The built-in Loongson 2E/2F northbridge in is bonito64-compatible but not identical with it. To avoid influencing the original bonito64 support and make the loongson support more maintainable, it's better to separate the Bonito64 code from the Loongson code. This also prepares the kernel for the coming Loongson 2f machines family support. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Cc: Linux-MIPS <linux-mips@linux-mips.org> Cc: yanh@lemote.com Cc: huhb@lemote.com Cc: Zhang Le <r0bertz@gentoo.org> Cc: zhangfx@lemote.com, Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
226 lines
5.9 KiB
C
226 lines
5.9 KiB
C
/*
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* Copyright (C) 2004 ICT CAS
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* Author: Li xiaoyu, ICT CAS
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* lixy@ict.ac.cn
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*
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* Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
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* Author: Fuxin Zhang, zhangfx@lemote.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <loongson.h>
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/* South bridge slot number is set by the pci probe process */
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static u8 sb_slot = 5;
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int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
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{
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int irq = 0;
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if (slot == sb_slot) {
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switch (PCI_FUNC(dev->devfn)) {
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case 2:
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irq = 10;
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break;
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case 3:
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irq = 11;
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break;
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case 5:
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irq = 9;
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break;
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}
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} else {
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irq = LOONGSON_IRQ_BASE + 25 + pin;
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}
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return irq;
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}
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/* Do platform specific device initialization at pci_enable_device() time */
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int pcibios_plat_dev_init(struct pci_dev *dev)
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{
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return 0;
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}
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static void __init loongson2e_nec_fixup(struct pci_dev *pdev)
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{
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unsigned int val;
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/* Configues port 1, 2, 3, 4 to be validate*/
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pci_read_config_dword(pdev, 0xe0, &val);
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pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x4);
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/* System clock is 48-MHz Oscillator. */
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pci_write_config_dword(pdev, 0xe4, 1 << 5);
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}
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static void __init loongson2e_686b_func0_fixup(struct pci_dev *pdev)
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{
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unsigned char c;
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sb_slot = PCI_SLOT(pdev->devfn);
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printk(KERN_INFO "via686b fix: ISA bridge\n");
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/* Enable I/O Recovery time */
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pci_write_config_byte(pdev, 0x40, 0x08);
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/* Enable ISA refresh */
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pci_write_config_byte(pdev, 0x41, 0x01);
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/* disable ISA line buffer */
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pci_write_config_byte(pdev, 0x45, 0x00);
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/* Gate INTR, and flush line buffer */
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pci_write_config_byte(pdev, 0x46, 0xe0);
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/* Disable PCI Delay Transaction, Enable EISA ports 4D0/4D1. */
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/* pci_write_config_byte(pdev, 0x47, 0x20); */
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/*
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* enable PCI Delay Transaction, Enable EISA ports 4D0/4D1.
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* enable time-out timer
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*/
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pci_write_config_byte(pdev, 0x47, 0xe6);
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/*
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* enable level trigger on pci irqs: 9,10,11,13
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* important! without this PCI interrupts won't work
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*/
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outb(0x2e, 0x4d1);
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/* 512 K PCI Decode */
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pci_write_config_byte(pdev, 0x48, 0x01);
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/* Wait for PGNT before grant to ISA Master/DMA */
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pci_write_config_byte(pdev, 0x4a, 0x84);
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/*
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* Plug'n'Play
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*
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* Parallel DRQ 3, Floppy DRQ 2 (default)
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*/
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pci_write_config_byte(pdev, 0x50, 0x0e);
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/*
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* IRQ Routing for Floppy and Parallel port
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*
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* IRQ 6 for floppy, IRQ 7 for parallel port
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*/
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pci_write_config_byte(pdev, 0x51, 0x76);
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/* IRQ Routing for serial ports (take IRQ 3 and 4) */
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pci_write_config_byte(pdev, 0x52, 0x34);
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/* All IRQ's level triggered. */
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pci_write_config_byte(pdev, 0x54, 0x00);
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/* route PIRQA-D irq */
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pci_write_config_byte(pdev, 0x55, 0x90); /* bit 7-4, PIRQA */
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pci_write_config_byte(pdev, 0x56, 0xba); /* bit 7-4, PIRQC; */
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/* 3-0, PIRQB */
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pci_write_config_byte(pdev, 0x57, 0xd0); /* bit 7-4, PIRQD */
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/* enable function 5/6, audio/modem */
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pci_read_config_byte(pdev, 0x85, &c);
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c &= ~(0x3 << 2);
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pci_write_config_byte(pdev, 0x85, c);
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printk(KERN_INFO"via686b fix: ISA bridge done\n");
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}
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static void __init loongson2e_686b_func1_fixup(struct pci_dev *pdev)
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{
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printk(KERN_INFO"via686b fix: IDE\n");
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/* Modify IDE controller setup */
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pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 48);
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pci_write_config_byte(pdev, PCI_COMMAND,
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PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
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PCI_COMMAND_MASTER);
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pci_write_config_byte(pdev, 0x40, 0x0b);
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/* legacy mode */
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pci_write_config_byte(pdev, 0x42, 0x09);
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#if 1/* play safe, otherwise we may see notebook's usb keyboard lockup */
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/* disable read prefetch/write post buffers */
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pci_write_config_byte(pdev, 0x41, 0x02);
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/* use 3/4 as fifo thresh hold */
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pci_write_config_byte(pdev, 0x43, 0x0a);
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pci_write_config_byte(pdev, 0x44, 0x00);
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pci_write_config_byte(pdev, 0x45, 0x00);
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#else
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pci_write_config_byte(pdev, 0x41, 0xc2);
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pci_write_config_byte(pdev, 0x43, 0x35);
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pci_write_config_byte(pdev, 0x44, 0x1c);
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pci_write_config_byte(pdev, 0x45, 0x10);
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#endif
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printk(KERN_INFO"via686b fix: IDE done\n");
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}
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static void __init loongson2e_686b_func2_fixup(struct pci_dev *pdev)
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{
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/* irq routing */
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pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, 10);
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}
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static void __init loongson2e_686b_func3_fixup(struct pci_dev *pdev)
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{
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/* irq routing */
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pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, 11);
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}
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static void __init loongson2e_686b_func5_fixup(struct pci_dev *pdev)
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{
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unsigned int val;
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unsigned char c;
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/* enable IO */
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pci_write_config_byte(pdev, PCI_COMMAND,
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PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
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PCI_COMMAND_MASTER);
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pci_read_config_dword(pdev, 0x4, &val);
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pci_write_config_dword(pdev, 0x4, val | 1);
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/* route ac97 IRQ */
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pci_write_config_byte(pdev, 0x3c, 9);
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pci_read_config_byte(pdev, 0x8, &c);
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/* link control: enable link & SGD PCM output */
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pci_write_config_byte(pdev, 0x41, 0xcc);
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/* disable game port, FM, midi, sb, enable write to reg2c-2f */
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pci_write_config_byte(pdev, 0x42, 0x20);
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/* we are using Avance logic codec */
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pci_write_config_word(pdev, 0x2c, 0x1005);
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pci_write_config_word(pdev, 0x2e, 0x4710);
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pci_read_config_dword(pdev, 0x2c, &val);
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pci_write_config_byte(pdev, 0x42, 0x0);
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}
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686,
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loongson2e_686b_func0_fixup);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1,
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loongson2e_686b_func1_fixup);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_2,
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loongson2e_686b_func2_fixup);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_3,
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loongson2e_686b_func3_fixup);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5,
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loongson2e_686b_func5_fixup);
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DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
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loongson2e_nec_fixup);
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