arch/mips/loongson/common/cs5536/cs5536_acc.c

   1 /*
   2  * the ACC Virtual Support Module of AMD CS5536
   3  *
   4  * Copyright (C) 2007 Lemote, Inc.
   5  * Author : jlliu, liujl@lemote.com
   6  *
   7  * Copyright (C) 2009 Lemote, Inc.
   8  * Author: Wu Zhangjin, wuzhangjin@gmail.com
   9  *
  10  * This program is free software; you can redistribute  it and/or modify it
  11  * under  the terms of  the GNU General  Public License as published by the
  12  * Free Software Foundation;  either version 2 of the  License, or (at your
  13  * option) any later version.
  14  */
  15
  16 #include <cs5536/cs5536.h>
  17 #include <cs5536/cs5536_pci.h>
  18
  19 void pci_acc_write_reg(int reg, u32 value)
  20 {
  21         u32 hi = 0, lo = value;
  22
  23         switch (reg) {
  24         case PCI_COMMAND:
  25                 _rdmsr(GLIU_MSR_REG(GLIU_PAE), &hi, &lo);
  26                 if (value & PCI_COMMAND_MASTER)
  27                         lo |= (0x03 << 8);
  28                 else
  29                         lo &= ~(0x03 << 8);
  30                 _wrmsr(GLIU_MSR_REG(GLIU_PAE), hi, lo);
  31                 break;
  32         case PCI_STATUS:
  33                 if (value & PCI_STATUS_PARITY) {
  34                         _rdmsr(SB_MSR_REG(SB_ERROR), &hi, &lo);
  35                         if (lo & SB_PARE_ERR_FLAG) {
  36                                 lo = (lo & 0x0000ffff) | SB_PARE_ERR_FLAG;
  37                                 _wrmsr(SB_MSR_REG(SB_ERROR), hi, lo);
  38                         }
  39                 }
  40                 break;
  41         case PCI_BAR0_REG:
  42                 if (value == PCI_BAR_RANGE_MASK) {
  43                         _rdmsr(GLCP_MSR_REG(GLCP_SOFT_COM), &hi, &lo);
  44                         lo |= SOFT_BAR_ACC_FLAG;
  45                         _wrmsr(GLCP_MSR_REG(GLCP_SOFT_COM), hi, lo);
  46                 } else if (value & 0x01) {
  47                         value &= 0xfffffffc;
  48                         hi = 0xA0000000 | ((value & 0x000ff000) >> 12);
  49                         lo = 0x000fff80 | ((value & 0x00000fff) << 20);
  50                         _wrmsr(GLIU_MSR_REG(GLIU_IOD_BM1), hi, lo);
  51                 }
  52                 break;
  53         case PCI_ACC_INT_REG:
  54                 _rdmsr(DIVIL_MSR_REG(PIC_YSEL_LOW), &hi, &lo);
  55                 /* disable all the usb interrupt in PIC */
  56                 lo &= ~(0xf << PIC_YSEL_LOW_ACC_SHIFT);
  57                 if (value)      /* enable all the acc interrupt in PIC */
  58                         lo |= (CS5536_ACC_INTR << PIC_YSEL_LOW_ACC_SHIFT);
  59                 _wrmsr(DIVIL_MSR_REG(PIC_YSEL_LOW), hi, lo);
  60                 break;
  61         default:
  62                 break;
  63         }
  64 }
  65
  66 u32 pci_acc_read_reg(int reg)
  67 {
  68         u32 hi, lo;
  69         u32 conf_data = 0;
  70
  71         switch (reg) {
  72         case PCI_VENDOR_ID:
  73                 conf_data =
  74                     CFG_PCI_VENDOR_ID(CS5536_ACC_DEVICE_ID, CS5536_VENDOR_ID);
  75                 break;
  76         case PCI_COMMAND:
  77                 _rdmsr(GLIU_MSR_REG(GLIU_IOD_BM1), &hi, &lo);
  78                 if (((lo & 0xfff00000) || (hi & 0x000000ff))
  79                     && ((hi & 0xf0000000) == 0xa0000000))
  80                         conf_data |= PCI_COMMAND_IO;
  81                 _rdmsr(GLIU_MSR_REG(GLIU_PAE), &hi, &lo);
  82                 if ((lo & 0x300) == 0x300)
  83                         conf_data |= PCI_COMMAND_MASTER;
  84                 break;
  85         case PCI_STATUS:
  86                 conf_data |= PCI_STATUS_66MHZ;
  87                 conf_data |= PCI_STATUS_FAST_BACK;
  88                 _rdmsr(SB_MSR_REG(SB_ERROR), &hi, &lo);
  89                 if (lo & SB_PARE_ERR_FLAG)
  90                         conf_data |= PCI_STATUS_PARITY;
  91                 conf_data |= PCI_STATUS_DEVSEL_MEDIUM;
  92                 break;
  93         case PCI_CLASS_REVISION:
  94                 _rdmsr(ACC_MSR_REG(ACC_CAP), &hi, &lo);
  95                 conf_data = lo & 0x000000ff;
  96                 conf_data |= (CS5536_ACC_CLASS_CODE << 8);
  97                 break;
  98         case PCI_CACHE_LINE_SIZE:
  99                 conf_data =
 100                     CFG_PCI_CACHE_LINE_SIZE(PCI_NORMAL_HEADER_TYPE,
 101                                             PCI_NORMAL_LATENCY_TIMER);
 102                 break;
 103         case PCI_BAR0_REG:
 104                 _rdmsr(GLCP_MSR_REG(GLCP_SOFT_COM), &hi, &lo);
 105                 if (lo & SOFT_BAR_ACC_FLAG) {
 106                         conf_data = CS5536_ACC_RANGE |
 107                             PCI_BASE_ADDRESS_SPACE_IO;
 108                         lo &= ~SOFT_BAR_ACC_FLAG;
 109                         _wrmsr(GLCP_MSR_REG(GLCP_SOFT_COM), hi, lo);
 110                 } else {
 111                         _rdmsr(GLIU_MSR_REG(GLIU_IOD_BM1), &hi, &lo);
 112                         conf_data = (hi & 0x000000ff) << 12;
 113                         conf_data |= (lo & 0xfff00000) >> 20;
 114                         conf_data |= 0x01;
 115                         conf_data &= ~0x02;
 116                 }
 117                 break;
 118         case PCI_CARDBUS_CIS:
 119                 conf_data = PCI_CARDBUS_CIS_POINTER;
 120                 break;
 121         case PCI_SUBSYSTEM_VENDOR_ID:
 122                 conf_data =
 123                     CFG_PCI_VENDOR_ID(CS5536_ACC_SUB_ID, CS5536_SUB_VENDOR_ID);
 124                 break;
 125         case PCI_ROM_ADDRESS:
 126                 conf_data = PCI_EXPANSION_ROM_BAR;
 127                 break;
 128         case PCI_CAPABILITY_LIST:
 129                 conf_data = PCI_CAPLIST_USB_POINTER;
 130                 break;
 131         case PCI_INTERRUPT_LINE:
 132                 conf_data =
 133                     CFG_PCI_INTERRUPT_LINE(PCI_DEFAULT_PIN, CS5536_ACC_INTR);
 134                 break;
 135         default:
 136                 break;
 137         }
 138
 139         return conf_data;
 140 }