arch/mips/pci/fixup-fuloong2e.c

   1 /*
   2  * Copyright (C) 2004 ICT CAS
   3  * Author: Li xiaoyu, ICT CAS
   4  *   lixy@ict.ac.cn
   5  *
   6  * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
   7  * Author: Fuxin Zhang, zhangfx@lemote.com
   8  *
   9  *  This program is free software; you can redistribute  it and/or modify it
  10  *  under  the terms of  the GNU General  Public License as published by the
  11  *  Free Software Foundation;  either version 2 of the  License, or (at your
  12  *  option) any later version.
  13  */
  14 #include <linux/init.h>
  15 #include <linux/pci.h>
  16
  17 #include <loongson.h>
  18
  19 /* South bridge slot number is set by the pci probe process */
  20 static u8 sb_slot = 5;
  21
  22 int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  23 {
  24         int irq = 0;
  25
  26         if (slot == sb_slot) {
  27                 switch (PCI_FUNC(dev->devfn)) {
  28                 case 2:
  29                         irq = 10;
  30                         break;
  31                 case 3:
  32                         irq = 11;
  33                         break;
  34                 case 5:
  35                         irq = 9;
  36                         break;
  37                 }
  38         } else {
  39                 irq = LOONGSON_IRQ_BASE + 25 + pin;
  40         }
  41         return irq;
  42
  43 }
  44
  45 /* Do platform specific device initialization at pci_enable_device() time */
  46 int pcibios_plat_dev_init(struct pci_dev *dev)
  47 {
  48         return 0;
  49 }
  50
  51 static void __init loongson2e_nec_fixup(struct pci_dev *pdev)
  52 {
  53         unsigned int val;
  54
  55         /* Configures port 1, 2, 3, 4 to be validate*/
  56         pci_read_config_dword(pdev, 0xe0, &val);
  57         pci_write_config_dword(pdev, 0xe0, (val & ~7) | 0x4);
  58
  59         /* System clock is 48-MHz Oscillator. */
  60         pci_write_config_dword(pdev, 0xe4, 1 << 5);
  61 }
  62
  63 static void __init loongson2e_686b_func0_fixup(struct pci_dev *pdev)
  64 {
  65         unsigned char c;
  66
  67         sb_slot = PCI_SLOT(pdev->devfn);
  68
  69         printk(KERN_INFO "via686b fix: ISA bridge\n");
  70
  71         /*  Enable I/O Recovery time */
  72         pci_write_config_byte(pdev, 0x40, 0x08);
  73
  74         /*  Enable ISA refresh */
  75         pci_write_config_byte(pdev, 0x41, 0x01);
  76
  77         /*  disable ISA line buffer */
  78         pci_write_config_byte(pdev, 0x45, 0x00);
  79
  80         /*  Gate INTR, and flush line buffer */
  81         pci_write_config_byte(pdev, 0x46, 0xe0);
  82
  83         /*  Disable PCI Delay Transaction, Enable EISA ports 4D0/4D1. */
  84         /* pci_write_config_byte(pdev, 0x47, 0x20); */
  85
  86         /*
  87          *  enable PCI Delay Transaction, Enable EISA ports 4D0/4D1.
  88          *  enable time-out timer
  89          */
  90         pci_write_config_byte(pdev, 0x47, 0xe6);
  91
  92         /*
  93          * enable level trigger on pci irqs: 9,10,11,13
  94          * important! without this PCI interrupts won't work
  95          */
  96         outb(0x2e, 0x4d1);
  97
  98         /*  512 K PCI Decode */
  99         pci_write_config_byte(pdev, 0x48, 0x01);
 100
 101         /*  Wait for PGNT before grant to ISA Master/DMA */
 102         pci_write_config_byte(pdev, 0x4a, 0x84);
 103
 104         /*
 105          * Plug'n'Play
 106          *
 107          *  Parallel DRQ 3, Floppy DRQ 2 (default)
 108          */
 109         pci_write_config_byte(pdev, 0x50, 0x0e);
 110
 111         /*
 112          * IRQ Routing for Floppy and Parallel port
 113          *
 114          *  IRQ 6 for floppy, IRQ 7 for parallel port
 115          */
 116         pci_write_config_byte(pdev, 0x51, 0x76);
 117
 118         /* IRQ Routing for serial ports (take IRQ 3 and 4) */
 119         pci_write_config_byte(pdev, 0x52, 0x34);
 120
 121         /*  All IRQ's level triggered. */
 122         pci_write_config_byte(pdev, 0x54, 0x00);
 123
 124         /* route PIRQA-D irq */
 125         pci_write_config_byte(pdev, 0x55, 0x90);        /* bit 7-4, PIRQA */
 126         pci_write_config_byte(pdev, 0x56, 0xba);        /* bit 7-4, PIRQC; */
 127                                                         /* 3-0, PIRQB */
 128         pci_write_config_byte(pdev, 0x57, 0xd0);        /* bit 7-4, PIRQD */
 129
 130         /* enable function 5/6, audio/modem */
 131         pci_read_config_byte(pdev, 0x85, &c);
 132         c &= ~(0x3 << 2);
 133         pci_write_config_byte(pdev, 0x85, c);
 134
 135         printk(KERN_INFO"via686b fix: ISA bridge done\n");
 136 }
 137
 138 static void __init loongson2e_686b_func1_fixup(struct pci_dev *pdev)
 139 {
 140         printk(KERN_INFO"via686b fix: IDE\n");
 141
 142         /* Modify IDE controller setup */
 143         pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 48);
 144         pci_write_config_byte(pdev, PCI_COMMAND,
 145                               PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
 146                               PCI_COMMAND_MASTER);
 147         pci_write_config_byte(pdev, 0x40, 0x0b);
 148         /* legacy mode */
 149         pci_write_config_byte(pdev, 0x42, 0x09);
 150
 151 #if 1/* play safe, otherwise we may see notebook's usb keyboard lockup */
 152         /* disable read prefetch/write post buffers */
 153         pci_write_config_byte(pdev, 0x41, 0x02);
 154
 155         /* use 3/4 as fifo thresh hold  */
 156         pci_write_config_byte(pdev, 0x43, 0x0a);
 157         pci_write_config_byte(pdev, 0x44, 0x00);
 158
 159         pci_write_config_byte(pdev, 0x45, 0x00);
 160 #else
 161         pci_write_config_byte(pdev, 0x41, 0xc2);
 162         pci_write_config_byte(pdev, 0x43, 0x35);
 163         pci_write_config_byte(pdev, 0x44, 0x1c);
 164
 165         pci_write_config_byte(pdev, 0x45, 0x10);
 166 #endif
 167
 168         printk(KERN_INFO"via686b fix: IDE done\n");
 169 }
 170
 171 static void __init loongson2e_686b_func2_fixup(struct pci_dev *pdev)
 172 {
 173         /* irq routing */
 174         pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, 10);
 175 }
 176
 177 static void __init loongson2e_686b_func3_fixup(struct pci_dev *pdev)
 178 {
 179         /* irq routing */
 180         pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, 11);
 181 }
 182
 183 static void __init loongson2e_686b_func5_fixup(struct pci_dev *pdev)
 184 {
 185         unsigned int val;
 186         unsigned char c;
 187
 188         /* enable IO */
 189         pci_write_config_byte(pdev, PCI_COMMAND,
 190                               PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
 191                               PCI_COMMAND_MASTER);
 192         pci_read_config_dword(pdev, 0x4, &val);
 193         pci_write_config_dword(pdev, 0x4, val | 1);
 194
 195         /* route ac97 IRQ */
 196         pci_write_config_byte(pdev, 0x3c, 9);
 197
 198         pci_read_config_byte(pdev, 0x8, &c);
 199
 200         /* link control: enable link & SGD PCM output */
 201         pci_write_config_byte(pdev, 0x41, 0xcc);
 202
 203         /* disable game port, FM, midi, sb, enable write to reg2c-2f */
 204         pci_write_config_byte(pdev, 0x42, 0x20);
 205
 206         /* we are using Avance logic codec */
 207         pci_write_config_word(pdev, 0x2c, 0x1005);
 208         pci_write_config_word(pdev, 0x2e, 0x4710);
 209         pci_read_config_dword(pdev, 0x2c, &val);
 210
 211         pci_write_config_byte(pdev, 0x42, 0x0);
 212 }
 213
 214 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686,
 215                          loongson2e_686b_func0_fixup);
 216 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1,
 217                          loongson2e_686b_func1_fixup);
 218 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_2,
 219                          loongson2e_686b_func2_fixup);
 220 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_3,
 221                          loongson2e_686b_func3_fixup);
 222 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5,
 223                          loongson2e_686b_func5_fixup);
 224 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
 225                          loongson2e_nec_fixup);