forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
221 lines
5.6 KiB
221 lines
5.6 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* Copyright (C) 2004 ICT CAS |
|
* Author: Li xiaoyu, ICT CAS |
|
* [email protected] |
|
* |
|
* Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology |
|
* Author: Fuxin Zhang, [email protected] |
|
*/ |
|
#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 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 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 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 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 loongson2e_686b_func2_fixup(struct pci_dev *pdev) |
|
{ |
|
/* irq routing */ |
|
pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, 10); |
|
} |
|
|
|
static void loongson2e_686b_func3_fixup(struct pci_dev *pdev) |
|
{ |
|
/* irq routing */ |
|
pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, 11); |
|
} |
|
|
|
static void 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);
|
|
|