arch/mips/pci/fixup-lemote2f.c

   1 /*
   2  * Copyright (C) 2008 Lemote Technology
   3  * Copyright (C) 2004 ICT CAS
   4  * Author: Li xiaoyu, lixy@ict.ac.cn
   5  *
   6  * Copyright (C) 2007 Lemote, Inc.
   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 #include <cs5536/cs5536.h>
  19 #include <cs5536/cs5536_pci.h>
  20
  21 /* PCI interrupt pins
  22  *
  23  * These should not be changed, or you should consider loongson2f interrupt
  24  * register and your pci card dispatch
  25  */
  26
  27 #define PCIA            4
  28 #define PCIB            5
  29 #define PCIC            6
  30 #define PCID            7
  31
  32 /* all the pci device has the PCIA pin, check the datasheet. */
  33 static char irq_tab[][5] __initdata = {
  34         /*      INTA    INTB    INTC    INTD */
  35         {0, 0, 0, 0, 0},        /*  11: Unused */
  36         {0, 0, 0, 0, 0},        /*  12: Unused */
  37         {0, 0, 0, 0, 0},        /*  13: Unused */
  38         {0, 0, 0, 0, 0},        /*  14: Unused */
  39         {0, 0, 0, 0, 0},        /*  15: Unused */
  40         {0, 0, 0, 0, 0},        /*  16: Unused */
  41         {0, PCIA, 0, 0, 0},     /*  17: RTL8110-0 */
  42         {0, PCIB, 0, 0, 0},     /*  18: RTL8110-1 */
  43         {0, PCIC, 0, 0, 0},     /*  19: SiI3114 */
  44         {0, PCID, 0, 0, 0},     /*  20: 3-ports nec usb */
  45         {0, PCIA, PCIB, PCIC, PCID},    /*  21: PCI-SLOT */
  46         {0, 0, 0, 0, 0},        /*  22: Unused */
  47         {0, 0, 0, 0, 0},        /*  23: Unused */
  48         {0, 0, 0, 0, 0},        /*  24: Unused */
  49         {0, 0, 0, 0, 0},        /*  25: Unused */
  50         {0, 0, 0, 0, 0},        /*  26: Unused */
  51         {0, 0, 0, 0, 0},        /*  27: Unused */
  52 };
  53
  54 int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  55 {
  56         int virq;
  57
  58         if ((PCI_SLOT(dev->devfn) != PCI_IDSEL_CS5536)
  59             && (PCI_SLOT(dev->devfn) < 32)) {
  60                 virq = irq_tab[slot][pin];
  61                 printk(KERN_INFO "slot: %d, pin: %d, irq: %d\n", slot, pin,
  62                        virq + LOONGSON_IRQ_BASE);
  63                 if (virq != 0)
  64                         return LOONGSON_IRQ_BASE + virq;
  65                 else
  66                         return 0;
  67         } else if (PCI_SLOT(dev->devfn) == PCI_IDSEL_CS5536) {  /*  cs5536 */
  68                 switch (PCI_FUNC(dev->devfn)) {
  69                 case 2:
  70                         pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
  71                                               CS5536_IDE_INTR);
  72                         return CS5536_IDE_INTR; /*  for IDE */
  73                 case 3:
  74                         pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
  75                                               CS5536_ACC_INTR);
  76                         return CS5536_ACC_INTR; /*  for AUDIO */
  77                 case 4: /*  for OHCI */
  78                 case 5: /*  for EHCI */
  79                 case 6: /*  for UDC */
  80                 case 7: /*  for OTG */
  81                         pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
  82                                               CS5536_USB_INTR);
  83                         return CS5536_USB_INTR;
  84                 }
  85                 return dev->irq;
  86         } else {
  87                 printk(KERN_INFO " strange pci slot number.\n");
  88                 return 0;
  89         }
  90 }
  91
  92 /* Do platform specific device initialization at pci_enable_device() time */
  93 int pcibios_plat_dev_init(struct pci_dev *dev)
  94 {
  95         return 0;
  96 }
  97
  98 /* CS5536 SPEC. fixup */
  99 static void __init loongson_cs5536_isa_fixup(struct pci_dev *pdev)
 100 {
 101         /* the uart1 and uart2 interrupt in PIC is enabled as default */
 102         pci_write_config_dword(pdev, PCI_UART1_INT_REG, 1);
 103         pci_write_config_dword(pdev, PCI_UART2_INT_REG, 1);
 104 }
 105
 106 static void __init loongson_cs5536_ide_fixup(struct pci_dev *pdev)
 107 {
 108         /* setting the mutex pin as IDE function */
 109         pci_write_config_dword(pdev, PCI_IDE_CFG_REG,
 110                                CS5536_IDE_FLASH_SIGNATURE);
 111 }
 112
 113 static void __init loongson_cs5536_acc_fixup(struct pci_dev *pdev)
 114 {
 115         /* enable the AUDIO interrupt in PIC  */
 116         pci_write_config_dword(pdev, PCI_ACC_INT_REG, 1);
 117
 118         pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xc0);
 119 }
 120
 121 static void __init loongson_cs5536_ohci_fixup(struct pci_dev *pdev)
 122 {
 123         /* enable the OHCI interrupt in PIC */
 124         /* THE OHCI, EHCI, UDC, OTG are shared with interrupt in PIC */
 125         pci_write_config_dword(pdev, PCI_OHCI_INT_REG, 1);
 126 }
 127
 128 static void __init loongson_cs5536_ehci_fixup(struct pci_dev *pdev)
 129 {
 130         u32 hi, lo;
 131
 132         /* Serial short detect enable */
 133         _rdmsr(USB_MSR_REG(USB_CONFIG), &hi, &lo);
 134         _wrmsr(USB_MSR_REG(USB_CONFIG), (1 << 1) | (1 << 3), lo);
 135
 136         /* setting the USB2.0 micro frame length */
 137         pci_write_config_dword(pdev, PCI_EHCI_FLADJ_REG, 0x2000);
 138 }
 139
 140 static void __init loongson_nec_fixup(struct pci_dev *pdev)
 141 {
 142         unsigned int val;
 143
 144         pci_read_config_dword(pdev, 0xe0, &val);
 145         /* Only 2 port be used */
 146         pci_write_config_dword(pdev, 0xe0, (val & ~3) | 0x2);
 147 }
 148
 149 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA,
 150                          loongson_cs5536_isa_fixup);
 151 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_OHC,
 152                          loongson_cs5536_ohci_fixup);
 153 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_EHC,
 154                          loongson_cs5536_ehci_fixup);
 155 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO,
 156                          loongson_cs5536_acc_fixup);
 157 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_IDE,
 158                          loongson_cs5536_ide_fixup);
 159 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
 160                          loongson_nec_fixup);