root/arch/mips/pci/fixup-lemote2f.c

DEFINITIONS

1. pcibios_map_irq
2. pcibios_plat_dev_init
3. loongson_cs5536_isa_fixup
4. loongson_cs5536_ide_fixup
5. loongson_cs5536_acc_fixup
6. loongson_cs5536_ohci_fixup
7. loongson_cs5536_ehci_fixup
8. loongson_nec_fixup

   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. */
  29 static 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 
  50 int 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 */
  89 int pcibios_plat_dev_init(struct pci_dev *dev)
  90 {
  91         return 0;
  92 }
  93 
  94 /* CS5536 SPEC. fixup */
  95 static 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 
 102 static 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 
 109 static 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 
 117 static 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 
 124 static 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 
 136 static 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 
 145 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA,
 146                          loongson_cs5536_isa_fixup);
 147 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_OHC,
 148                          loongson_cs5536_ohci_fixup);
 149 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_EHC,
 150                          loongson_cs5536_ehci_fixup);
 151 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO,
 152                          loongson_cs5536_acc_fixup);
 153 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_IDE,
 154                          loongson_cs5536_ide_fixup);
 155 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
 156                          loongson_nec_fixup);