LXR linux/arch/mips/pci/fixup-lemote2f.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Copyright (C) 2008 Lemote Technology
   4 * Copyright (C) 2004 ICT CAS
   5 * Author: Li xiaoyu, lixy@ict.ac.cn
   6 *
   7 * Copyright (C) 2007 Lemote, Inc.
   8 * Author: Fuxin Zhang, zhangfx@lemote.com
   9 */
  10#include <linux/init.h>
  11#include <linux/pci.h>
  12
  13#include <loongson.h>
  14#include <cs5536/cs5536.h>
  15#include <cs5536/cs5536_pci.h>
  16
  17/* PCI interrupt pins
  18 *
  19 * These should not be changed, or you should consider loongson2f interrupt
  20 * register and your pci card dispatch
  21 */
  22
  23#define PCIA            4
  24#define PCIB            5
  25#define PCIC            6
  26#define PCID            7
  27
  28/* all the pci device has the PCIA pin, check the datasheet. */
  29static char irq_tab[][5] = {
  30        /*      INTA    INTB    INTC    INTD */
  31        {0, 0, 0, 0, 0},        /*  11: Unused */
  32        {0, 0, 0, 0, 0},        /*  12: Unused */
  33        {0, 0, 0, 0, 0},        /*  13: Unused */
  34        {0, 0, 0, 0, 0},        /*  14: Unused */
  35        {0, 0, 0, 0, 0},        /*  15: Unused */
  36        {0, 0, 0, 0, 0},        /*  16: Unused */
  37        {0, PCIA, 0, 0, 0},     /*  17: RTL8110-0 */
  38        {0, PCIB, 0, 0, 0},     /*  18: RTL8110-1 */
  39        {0, PCIC, 0, 0, 0},     /*  19: SiI3114 */
  40        {0, PCID, 0, 0, 0},     /*  20: 3-ports nec usb */
  41        {0, PCIA, PCIB, PCIC, PCID},    /*  21: PCI-SLOT */
  42        {0, 0, 0, 0, 0},        /*  22: Unused */
  43        {0, 0, 0, 0, 0},        /*  23: Unused */
  44        {0, 0, 0, 0, 0},        /*  24: Unused */
  45        {0, 0, 0, 0, 0},        /*  25: Unused */
  46        {0, 0, 0, 0, 0},        /*  26: Unused */
  47        {0, 0, 0, 0, 0},        /*  27: Unused */
  48};
  49
  50int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  51{
  52        int virq;
  53
  54        if ((PCI_SLOT(dev->devfn) != PCI_IDSEL_CS5536)
  55            && (PCI_SLOT(dev->devfn) < 32)) {
  56                virq = irq_tab[slot][pin];
  57                printk(KERN_INFO "slot: %d, pin: %d, irq: %d\n", slot, pin,
  58                       virq + LOONGSON_IRQ_BASE);
  59                if (virq != 0)
  60                        return LOONGSON_IRQ_BASE + virq;
  61                else
  62                        return 0;
  63        } else if (PCI_SLOT(dev->devfn) == PCI_IDSEL_CS5536) {  /*  cs5536 */
  64                switch (PCI_FUNC(dev->devfn)) {
  65                case 2:
  66                        pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
  67                                              CS5536_IDE_INTR);
  68                        return CS5536_IDE_INTR; /*  for IDE */
  69                case 3:
  70                        pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
  71                                              CS5536_ACC_INTR);
  72                        return CS5536_ACC_INTR; /*  for AUDIO */
  73                case 4: /*  for OHCI */
  74                case 5: /*  for EHCI */
  75                case 6: /*  for UDC */
  76                case 7: /*  for OTG */
  77                        pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
  78                                              CS5536_USB_INTR);
  79                        return CS5536_USB_INTR;
  80                }
  81                return dev->irq;
  82        } else {
  83                printk(KERN_INFO " strange pci slot number.\n");
  84                return 0;
  85        }
  86}
  87
  88/* Do platform specific device initialization at pci_enable_device() time */
  89int pcibios_plat_dev_init(struct pci_dev *dev)
  90{
  91        return 0;
  92}
  93
  94/* CS5536 SPEC. fixup */
  95static void loongson_cs5536_isa_fixup(struct pci_dev *pdev)
  96{
  97        /* the uart1 and uart2 interrupt in PIC is enabled as default */
  98        pci_write_config_dword(pdev, PCI_UART1_INT_REG, 1);
  99        pci_write_config_dword(pdev, PCI_UART2_INT_REG, 1);
 100}
 101
 102static void loongson_cs5536_ide_fixup(struct pci_dev *pdev)
 103{
 104        /* setting the mutex pin as IDE function */
 105        pci_write_config_dword(pdev, PCI_IDE_CFG_REG,
 106                               CS5536_IDE_FLASH_SIGNATURE);
 107}
 108
 109static void loongson_cs5536_acc_fixup(struct pci_dev *pdev)
 110{
 111        /* enable the AUDIO interrupt in PIC  */
 112        pci_write_config_dword(pdev, PCI_ACC_INT_REG, 1);
 113
 114        pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xc0);
 115}
 116
 117static void loongson_cs5536_ohci_fixup(struct pci_dev *pdev)
 118{
 119        /* enable the OHCI interrupt in PIC */
 120        /* THE OHCI, EHCI, UDC, OTG are shared with interrupt in PIC */
 121        pci_write_config_dword(pdev, PCI_OHCI_INT_REG, 1);
 122}
 123
 124static void loongson_cs5536_ehci_fixup(struct pci_dev *pdev)
 125{
 126        u32 hi, lo;
 127
 128        /* Serial short detect enable */
 129        _rdmsr(USB_MSR_REG(USB_CONFIG), &hi, &lo);
 130        _wrmsr(USB_MSR_REG(USB_CONFIG), (1 << 1) | (1 << 3), lo);
 131
 132        /* setting the USB2.0 micro frame length */
 133        pci_write_config_dword(pdev, PCI_EHCI_FLADJ_REG, 0x2000);
 134}
 135
 136static void loongson_nec_fixup(struct pci_dev *pdev)
 137{
 138        unsigned int val;
 139
 140        pci_read_config_dword(pdev, 0xe0, &val);
 141        /* Only 2 port be used */
 142        pci_write_config_dword(pdev, 0xe0, (val & ~3) | 0x2);
 143}
 144
 145DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA,
 146                         loongson_cs5536_isa_fixup);
 147DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_OHC,
 148                         loongson_cs5536_ohci_fixup);
 149DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_EHC,
 150                         loongson_cs5536_ehci_fixup);
 151DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO,
 152                         loongson_cs5536_acc_fixup);
 153DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_IDE,
 154                         loongson_cs5536_ide_fixup);
 155DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
 156                         loongson_nec_fixup);
 157