drivers/pci/pci_indirect.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Support for indirect PCI bridges.
   4  *
   5  * Copyright (C) 1998 Gabriel Paubert.
   6  */
   7
   8 #include <common.h>
   9
  10 #if !defined(__I386__) && !defined(CONFIG_DM_PCI)
  11
  12 #include <asm/processor.h>
  13 #include <asm/io.h>
  14 #include <pci.h>
  15
  16 #define cfg_read(val, addr, type, op)   *val = op((type)(addr))
  17 #define cfg_write(val, addr, type, op)  op((type *)(addr), (val))
  18
  19 #if defined(CONFIG_E500) || defined(CONFIG_MPC86xx)
  20 #define INDIRECT_PCI_OP(rw, size, type, op, mask)                        \
  21 static int                                                               \
  22 indirect_##rw##_config_##size(struct pci_controller *hose,               \
  23                               pci_dev_t dev, int offset, type val)       \
  24 {                                                                        \
  25         u32 b, d,f;                                                      \
  26         b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev);           \
  27         b = b - hose->first_busno;                                       \
  28         dev = PCI_BDF(b, d, f);                                          \
  29         *(hose->cfg_addr) = dev | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000; \
  30         sync();                                                          \
  31         cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);       \
  32         return 0;                                                        \
  33 }
  34 #else
  35 #define INDIRECT_PCI_OP(rw, size, type, op, mask)                        \
  36 static int                                                               \
  37 indirect_##rw##_config_##size(struct pci_controller *hose,               \
  38                               pci_dev_t dev, int offset, type val)       \
  39 {                                                                        \
  40         u32 b, d,f;                                                      \
  41         b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev);           \
  42         b = b - hose->first_busno;                                       \
  43         dev = PCI_BDF(b, d, f);                                          \
  44         out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000);    \
  45         cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);       \
  46         return 0;                                                        \
  47 }
  48 #endif
  49
  50 INDIRECT_PCI_OP(read, byte, u8 *, in_8, 3)
  51 INDIRECT_PCI_OP(read, word, u16 *, in_le16, 2)
  52 INDIRECT_PCI_OP(read, dword, u32 *, in_le32, 0)
  53 INDIRECT_PCI_OP(write, byte, u8, out_8, 3)
  54 INDIRECT_PCI_OP(write, word, u16, out_le16, 2)
  55 INDIRECT_PCI_OP(write, dword, u32, out_le32, 0)
  56
  57 void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
  58 {
  59         pci_set_ops(hose,
  60                     indirect_read_config_byte,
  61                     indirect_read_config_word,
  62                     indirect_read_config_dword,
  63                     indirect_write_config_byte,
  64                     indirect_write_config_word,
  65                     indirect_write_config_dword);
  66
  67         hose->cfg_addr = (unsigned int *) cfg_addr;
  68         hose->cfg_data = (unsigned char *) cfg_data;
  69 }
  70
  71 #endif  /* !__I386__ */