board/tb0229/vr4131-pci.c

   1 /*
   2  * VR4131 PCIU support code for TANBAC Evaluation board TB0229.
   3  *
   4  * (C) Masami Komiya <mkomiya@sonare.it> 2004
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2, or (at
   9  * your option) any later version.
  10  */
  11
  12 #include <common.h>
  13 #include <pci.h>
  14 #include <asm/addrspace.h>
  15
  16 #define VR4131_PCIMMAW1REG      (volatile unsigned int *)(CKSEG1 + 0x0f000c00)
  17 #define VR4131_PCIMMAW2REG      (volatile unsigned int *)(CKSEG1 + 0x0f000c04)
  18 #define VR4131_PCITAW1REG       (volatile unsigned int *)(CKSEG1 + 0x0f000c08)
  19 #define VR4131_PCITAW2REG       (volatile unsigned int *)(CKSEG1 + 0x0f000c0c)
  20 #define VR4131_PCIMIOAWREG      (volatile unsigned int *)(CKSEG1 + 0x0f000c10)
  21 #define VR4131_PCICONFDREG      (volatile unsigned int *)(CKSEG1 + 0x0f000c14)
  22 #define VR4131_PCICONFAREG      (volatile unsigned int *)(CKSEG1 + 0x0f000c18)
  23 #define VR4131_PCIMAILREG       (volatile unsigned int *)(CKSEG1 + 0x0f000c1c)
  24 #define VR4131_BUSERRADREG      (volatile unsigned int *)(CKSEG1 + 0x0f000c24)
  25 #define VR4131_INTCNTSTAREG     (volatile unsigned int *)(CKSEG1 + 0x0f000c28)
  26 #define VR4131_PCIEXACCREG      (volatile unsigned int *)(CKSEG1 + 0x0f000c2c)
  27 #define VR4131_PCIRECONTREG     (volatile unsigned int *)(CKSEG1 + 0x0f000c30)
  28 #define VR4131_PCIENREG         (volatile unsigned int *)(CKSEG1 + 0x0f000c34)
  29 #define VR4131_PCICLKSELREG     (volatile unsigned int *)(CKSEG1 + 0x0f000c38)
  30 #define VR4131_PCITRDYREG       (volatile unsigned int *)(CKSEG1 + 0x0f000c3c)
  31 #define VR4131_PCICLKRUNREG     (volatile unsigned int *)(CKSEG1 + 0x0f000c60)
  32 #define VR4131_PCIHOSTCONFIG    (volatile unsigned int *)(CKSEG1 + 0x0f000d00)
  33 #define VR4131_VENDORIDREG      (volatile unsigned int *)(CKSEG1 + 0x0f000d00)
  34 #define VR4131_DEVICEIDREG      (volatile unsigned int *)(CKSEG1 + 0x0f000d00)
  35 #define VR4131_COMMANDREG       (volatile unsigned int *)(CKSEG1 + 0x0f000d04)
  36 #define VR4131_STATUSREG        (volatile unsigned int *)(CKSEG1 + 0x0f000d04)
  37 #define VR4131_REVREG           (volatile unsigned int *)(CKSEG1 + 0x0f000d08)
  38 #define VR4131_CLASSREG         (volatile unsigned int *)(CKSEG1 + 0x0f000d08)
  39 #define VR4131_CACHELSREG       (volatile unsigned int *)(CKSEG1 + 0x0f000d0c)
  40 #define VR4131_LATTIMERRG       (volatile unsigned int *)(CKSEG1 + 0x0f000d0c)
  41 #define VR4131_MAILBAREG        (volatile unsigned int *)(CKSEG1 + 0x0f000d10)
  42 #define VR4131_PCIMBA1REG       (volatile unsigned int *)(CKSEG1 + 0x0f000d14)
  43 #define VR4131_PCIMBA2REG       (volatile unsigned int *)(CKSEG1 + 0x0f000d18)
  44
  45 /*#define VR41XX_PCIIRQ_OFFSET    (VR41XX_IRQ_MAX + 1)  */
  46 /*#define VR41XX_PCIIRQ_MAX       (VR41XX_IRQ_MAX + 12) */
  47 /*#define VR4122_PCI_HOST_BASE    0xa0000000            */
  48
  49 volatile unsigned int *pciconfigaddr;
  50 volatile unsigned int *pciconfigdata;
  51
  52 #define PCI_ACCESS_READ  0
  53 #define PCI_ACCESS_WRITE 1
  54
  55 /*
  56  *      Access PCI Configuration Register for VR4131
  57  */
  58
  59 static int vr4131_pci_config_access (u8 access_type, u32 dev, u32 reg,
  60                                      u32 * data)
  61 {
  62         u32 bus;
  63         u32 device;
  64
  65         bus = ((dev & 0xff0000) >> 16);
  66         device = ((dev & 0xf800) >> 11);
  67
  68         if (bus == 0) {
  69                 /* Type 0 Configuration */
  70                 *VR4131_PCICONFAREG = (u32) (1UL << device | (reg & 0xfc));
  71         } else {
  72                 /* Type 1 Configuration */
  73                 *VR4131_PCICONFAREG = (u32) (dev | ((reg / 4) << 2) | 1);
  74         }
  75
  76         if (access_type == PCI_ACCESS_WRITE) {
  77                 *VR4131_PCICONFDREG = *data;
  78         } else {
  79                 *data = *VR4131_PCICONFDREG;
  80         }
  81
  82         return (0);
  83 }
  84
  85 static int vr4131_pci_read_config_byte (u32 hose, u32 dev, u32 reg, u8 * val)
  86 {
  87         u32 data;
  88
  89         if (vr4131_pci_config_access (PCI_ACCESS_READ, dev, reg, &data))
  90                 return -1;
  91
  92         *val = (data >> ((reg & 3) << 3)) & 0xff;
  93
  94         return 0;
  95 }
  96
  97
  98 static int vr4131_pci_read_config_word (u32 hose, u32 dev, u32 reg, u16 * val)
  99 {
 100         u32 data;
 101
 102         if (reg & 1)
 103                 return -1;
 104
 105         if (vr4131_pci_config_access (PCI_ACCESS_READ, dev, reg, &data))
 106                 return -1;
 107
 108         *val = (data >> ((reg & 3) << 3)) & 0xffff;
 109
 110         return 0;
 111 }
 112
 113
 114 static int vr4131_pci_read_config_dword (u32 hose, u32 dev, u32 reg,
 115                                          u32 * val)
 116 {
 117         u32 data = 0;
 118
 119         if (reg & 3)
 120                 return -1;
 121
 122         if (vr4131_pci_config_access (PCI_ACCESS_READ, dev, reg, &data))
 123                 return -1;
 124
 125         *val = data;
 126
 127         return (0);
 128 }
 129
 130 static int vr4131_pci_write_config_byte (u32 hose, u32 dev, u32 reg, u8 val)
 131 {
 132         u32 data = 0;
 133
 134         if (vr4131_pci_config_access (PCI_ACCESS_READ, dev, reg, &data))
 135                 return -1;
 136
 137         data = (data & ~(0xff << ((reg & 3) << 3))) | (val <<
 138                                                        ((reg & 3) << 3));
 139
 140         if (vr4131_pci_config_access (PCI_ACCESS_WRITE, dev, reg, &data))
 141                 return -1;
 142
 143         return 0;
 144 }
 145
 146
 147 static int vr4131_pci_write_config_word (u32 hose, u32 dev, u32 reg, u16 val)
 148 {
 149         u32 data = 0;
 150
 151         if (reg & 1)
 152                 return -1;
 153
 154         if (vr4131_pci_config_access (PCI_ACCESS_READ, dev, reg, &data))
 155                 return -1;
 156
 157         data = (data & ~(0xffff << ((reg & 3) << 3))) | (val <<
 158                                                          ((reg & 3) << 3));
 159
 160         if (vr4131_pci_config_access (PCI_ACCESS_WRITE, dev, reg, &data))
 161                 return -1;
 162
 163         return 0;
 164 }
 165
 166 static int vr4131_pci_write_config_dword (u32 hose, u32 dev, u32 reg, u32 val)
 167 {
 168         u32 data;
 169
 170         if (reg & 3) {
 171                 return -1;
 172         }
 173
 174         data = val;
 175
 176         if (vr4131_pci_config_access (PCI_ACCESS_WRITE, dev, reg, &data))
 177                 return -1;
 178
 179         return (0);
 180 }
 181
 182
 183 /*
 184  *      Initialize VR4131 PCIU
 185  */
 186
 187 vr4131_pciu_init ()
 188 {
 189         /* PCI clock */
 190         *VR4131_PCICLKSELREG = 0x00000002;
 191
 192         /* PCI memory and I/O space */
 193         *VR4131_PCIMMAW1REG = 0x100F9010;
 194         *VR4131_PCIMMAW2REG = 0x140FD014;
 195         *VR4131_PCIMIOAWREG = 0x160FD000;
 196
 197         /* Target memory window */
 198         *VR4131_PCITAW1REG = 0x00081000;        /* 64MB */
 199         *VR4131_PCITAW2REG = 0x00000000;
 200
 201         *VR4131_MAILBAREG = 0UL;
 202         *VR4131_PCIMBA1REG = 0UL;
 203
 204         *VR4131_PCITRDYREG = 0x00008004;
 205
 206         *VR4131_PCIENREG = 0x00000004;  /* PCI enable */
 207         *VR4131_COMMANDREG = 0x02000007;
 208 }
 209
 210 /*
 211  *      Initialize Module
 212  */
 213
 214 void init_vr4131_pci (struct pci_controller *hose)
 215 {
 216         hose->first_busno = 0;
 217         hose->last_busno = 0xff;
 218
 219         vr4131_pciu_init ();    /* Initialize VR4131 PCIU */
 220
 221         /* PCI memory space #1 */
 222         pci_set_region (hose->regions + 0,
 223                         0x10000000, 0xb0000000, 0x04000000, PCI_REGION_MEM);
 224
 225         /* PCI memory space #2 */
 226         pci_set_region (hose->regions + 1,
 227                         0x14000000, 0xb4000000, 0x02000000, PCI_REGION_MEM);
 228
 229
 230         /* PCI I/O space */
 231         pci_set_region (hose->regions + 2,
 232                         0x16000000, 0xb6000000, 0x02000000, PCI_REGION_IO);
 233
 234         /* System memory space */
 235         pci_set_region (hose->regions + 3,
 236                         0x00000000,
 237                         0x80000000,
 238                         0x04000000, PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
 239
 240         hose->region_count = 4;
 241
 242         hose->read_byte = vr4131_pci_read_config_byte;
 243         hose->read_word = vr4131_pci_read_config_word;
 244         hose->read_dword = vr4131_pci_read_config_dword;
 245         hose->write_byte = vr4131_pci_write_config_byte;
 246         hose->write_word = vr4131_pci_write_config_word;
 247         hose->write_dword = vr4131_pci_write_config_dword;
 248
 249         pci_register_hose (hose);
 250
 251         hose->last_busno = pci_hose_scan (hose);
 252
 253         return;
 254 }