lib_i386/pci_type1.c

   1 /*
   2  * Support for type PCI configuration cycles.
   3  * based on pci_indirect.c
   4  *
   5  * Copyright (C) 2002 Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version
  10  * 2 of the License, or (at your option) any later version.
  11  */
  12
  13 #include <common.h>
  14
  15 #ifdef CONFIG_PCI
  16
  17 #include <asm/io.h>
  18 #include <pci.h>
  19
  20 #define cfg_read(val, addr, op) *val = op((int)(addr))
  21 #define cfg_write(val, addr, op)        op((val), (int)(addr))
  22
  23 #define TYPE1_PCI_OP(rw, size, type, op, mask)                   \
  24 static int                                                               \
  25 type1_##rw##_config_##size(struct pci_controller *hose,                  \
  26                               pci_dev_t dev, int offset, type val)       \
  27 {                                                                        \
  28         outl(dev | (offset & 0xfc) | 0x80000000, (int)hose->cfg_addr);   \
  29         cfg_##rw(val, hose->cfg_data + (offset & mask), op);     \
  30         return 0;                                                        \
  31 }
  32
  33
  34 TYPE1_PCI_OP(read, byte, u8 *, inb, 3)
  35 TYPE1_PCI_OP(read, word, u16 *, inw, 2)
  36 TYPE1_PCI_OP(read, dword, u32 *, inl, 0)
  37
  38 TYPE1_PCI_OP(write, byte, u8, outb, 3)
  39 TYPE1_PCI_OP(write, word, u16, outw, 2)
  40 TYPE1_PCI_OP(write, dword, u32, outl, 0)
  41
  42 void pci_setup_type1(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
  43 {
  44         pci_set_ops(hose,
  45                     type1_read_config_byte,
  46                     type1_read_config_word,
  47                     type1_read_config_dword,
  48                     type1_write_config_byte,
  49                     type1_write_config_word,
  50                     type1_write_config_dword);
  51
  52         hose->cfg_addr = (unsigned int *) cfg_addr;
  53         hose->cfg_data = (unsigned char *) cfg_data;
  54 }
  55
  56 #endif