arch/x86/lib/pci_type1.c

   1 /*
   2  * (C) Copyright 2002
   3  * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 /*
   9  * Support for type PCI configuration cycles.
  10  * based on pci_indirect.c
  11  */
  12 #include <common.h>
  13 #include <asm/io.h>
  14 #include <pci.h>
  15
  16 #define cfg_read(val, addr, op)         (*val = op((int)(addr)))
  17 #define cfg_write(val, addr, op)        op((val), (int)(addr))
  18
  19 #define TYPE1_PCI_OP(rw, size, type, op, mask)                          \
  20 static int                                                              \
  21 type1_##rw##_config_##size(struct pci_controller *hose,                 \
  22                               pci_dev_t dev, int offset, type val)      \
  23 {                                                                       \
  24         outl(dev | (offset & 0xfc) | 0x80000000, (int)hose->cfg_addr);  \
  25         cfg_##rw(val, hose->cfg_data + (offset & mask), op);            \
  26         return 0;                                                       \
  27 }
  28
  29 TYPE1_PCI_OP(read, byte, u8 *, inb, 3)
  30 TYPE1_PCI_OP(read, word, u16 *, inw, 2)
  31 TYPE1_PCI_OP(read, dword, u32 *, inl, 0)
  32
  33 TYPE1_PCI_OP(write, byte, u8, outb, 3)
  34 TYPE1_PCI_OP(write, word, u16, outw, 2)
  35 TYPE1_PCI_OP(write, dword, u32, outl, 0)
  36
  37 /* bus mapping constants (used for PCI core initialization) */
  38 #define PCI_REG_ADDR            0x00000cf8
  39 #define PCI_REG_DATA            0x00000cfc
  40
  41 void pci_setup_type1(struct pci_controller *hose)
  42 {
  43         pci_set_ops(hose,
  44                     type1_read_config_byte,
  45                     type1_read_config_word,
  46                     type1_read_config_dword,
  47                     type1_write_config_byte,
  48                     type1_write_config_word,
  49                     type1_write_config_dword);
  50
  51         hose->cfg_addr = (unsigned int *)PCI_REG_ADDR;
  52         hose->cfg_data = (unsigned char *)PCI_REG_DATA;
  53 }