drivers/pci/pci_indirect.c

   1 /*
   2  * Support for indirect PCI bridges.
   3  *
   4  * Copyright (C) 1998 Gabriel Paubert.
   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
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11
  12 #include <common.h>
  13
  14 #if !defined(__I386__)
  15
  16 #include <asm/processor.h>
  17 #include <asm/io.h>
  18 #include <pci.h>
  19
  20 #define cfg_read(val, addr, type, op)   *val = op((type)(addr))
  21 #define cfg_write(val, addr, type, op)  op((type *)(addr), (val))
  22
  23 #if defined(CONFIG_MPC8260)
  24 #define INDIRECT_PCI_OP(rw, size, type, op, mask)                        \
  25 static int                                                               \
  26 indirect_##rw##_config_##size(struct pci_controller *hose,               \
  27                               pci_dev_t dev, int offset, type val)       \
  28 {                                                                        \
  29         u32 b, d,f;                                                      \
  30         b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev);           \
  31         b = b - hose->first_busno;                                       \
  32         dev = PCI_BDF(b, d, f);                                          \
  33         out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000);    \
  34         sync();                                                          \
  35         cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);       \
  36         return 0;                                                        \
  37 }
  38 #elif defined(CONFIG_E500) || defined(CONFIG_MPC86xx)
  39 #define INDIRECT_PCI_OP(rw, size, type, op, mask)                        \
  40 static int                                                               \
  41 indirect_##rw##_config_##size(struct pci_controller *hose,               \
  42                               pci_dev_t dev, int offset, type val)       \
  43 {                                                                        \
  44         u32 b, d,f;                                                      \
  45         b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev);           \
  46         b = b - hose->first_busno;                                       \
  47         dev = PCI_BDF(b, d, f);                                          \
  48         *(hose->cfg_addr) = dev | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000; \
  49         sync();                                                          \
  50         cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);       \
  51         return 0;                                                        \
  52 }
  53 #elif defined(CONFIG_440GX)  || defined(CONFIG_440GP) || defined(CONFIG_440SP) || \
  54       defined(CONFIG_440SPE) || defined(CONFIG_460EX) || defined(CONFIG_460GT)
  55 #define INDIRECT_PCI_OP(rw, size, type, op, mask)                        \
  56 static int                                                               \
  57 indirect_##rw##_config_##size(struct pci_controller *hose,               \
  58                               pci_dev_t dev, int offset, type val)       \
  59 {                                                                        \
  60         u32 b, d,f;                                                      \
  61         b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev);           \
  62         b = b - hose->first_busno;                                       \
  63         dev = PCI_BDF(b, d, f);                                          \
  64         if (PCI_BUS(dev) > 0)                                            \
  65                 out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000001); \
  66         else                                                             \
  67                 out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \
  68         cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);       \
  69         return 0;                                                        \
  70 }
  71 #else
  72 #define INDIRECT_PCI_OP(rw, size, type, op, mask)                        \
  73 static int                                                               \
  74 indirect_##rw##_config_##size(struct pci_controller *hose,               \
  75                               pci_dev_t dev, int offset, type val)       \
  76 {                                                                        \
  77         u32 b, d,f;                                                      \
  78         b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev);           \
  79         b = b - hose->first_busno;                                       \
  80         dev = PCI_BDF(b, d, f);                                          \
  81         out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000);    \
  82         cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);       \
  83         return 0;                                                        \
  84 }
  85 #endif
  86
  87 #define INDIRECT_PCI_OP_ERRATA6(rw, size, type, op, mask)                \
  88 static int                                                               \
  89 indirect_##rw##_config_##size(struct pci_controller *hose,               \
  90                               pci_dev_t dev, int offset, type val)       \
  91 {                                                                        \
  92         unsigned int msr = mfmsr();                                      \
  93         mtmsr(msr & ~(MSR_EE | MSR_CE));                                 \
  94         out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000);    \
  95         cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);       \
  96         out_le32(hose->cfg_addr, 0x00000000);                            \
  97         mtmsr(msr);                                                      \
  98         return 0;                                                        \
  99 }
 100
 101 INDIRECT_PCI_OP(read, byte, u8 *, in_8, 3)
 102 INDIRECT_PCI_OP(read, word, u16 *, in_le16, 2)
 103 INDIRECT_PCI_OP(read, dword, u32 *, in_le32, 0)
 104 #ifdef CONFIG_405GP
 105 INDIRECT_PCI_OP_ERRATA6(write, byte, u8, out_8, 3)
 106 INDIRECT_PCI_OP_ERRATA6(write, word, u16, out_le16, 2)
 107 INDIRECT_PCI_OP_ERRATA6(write, dword, u32, out_le32, 0)
 108 #else
 109 INDIRECT_PCI_OP(write, byte, u8, out_8, 3)
 110 INDIRECT_PCI_OP(write, word, u16, out_le16, 2)
 111 INDIRECT_PCI_OP(write, dword, u32, out_le32, 0)
 112 #endif
 113
 114 void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
 115 {
 116         pci_set_ops(hose,
 117                     indirect_read_config_byte,
 118                     indirect_read_config_word,
 119                     indirect_read_config_dword,
 120                     indirect_write_config_byte,
 121                     indirect_write_config_word,
 122                     indirect_write_config_dword);
 123
 124         hose->cfg_addr = (unsigned int *) cfg_addr;
 125         hose->cfg_data = (unsigned char *) cfg_data;
 126 }
 127
 128 #endif  /* !__I386__ */