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Linux/arch/mips/loongson64/common/cs5536/cs5536_acc.c

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  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 }
141 

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