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/*
* Support for indirect PCI bridges.
*
* Copyright (C) 1998 Gabriel Paubert.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <common.h>
#ifdef CONFIG_PCI
#include <asm/processor.h>
#include <asm/io.h>
#include <pci.h>
#define cfg_read(val, addr, type, op) *val = op((type)(addr))
#define cfg_write(val, addr, type, op) op((type *)(addr), (val))
#define INDIRECT_PCI_OP(rw, size, type, op, mask) \
static int \
indirect_##rw##_config_##size(struct pci_controller *hose, \
pci_dev_t dev, int offset, type val) \
{ \
out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \
cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
return 0; \
}
#define INDIRECT_PCI_OP_ERRATA6(rw, size, type, op, mask) \
static int \
indirect_##rw##_config_##size(struct pci_controller *hose, \
pci_dev_t dev, int offset, type val) \
{ \
unsigned int msr = mfmsr(); \
mtmsr(msr & ~(MSR_EE | MSR_CE)); \
out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \
cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
out_le32(hose->cfg_addr, 0x00000000); \
mtmsr(msr); \
return 0; \
}
INDIRECT_PCI_OP(read, byte, u8 *, in_8, 3)
INDIRECT_PCI_OP(read, word, u16 *, in_le16, 2)
INDIRECT_PCI_OP(read, dword, u32 *, in_le32, 0)
#ifdef CONFIG_405GP
INDIRECT_PCI_OP_ERRATA6(write, byte, u8, out_8, 3)
INDIRECT_PCI_OP_ERRATA6(write, word, u16, out_le16, 2)
INDIRECT_PCI_OP_ERRATA6(write, dword, u32, out_le32, 0)
#else
INDIRECT_PCI_OP(write, byte, u8, out_8, 3)
INDIRECT_PCI_OP(write, word, u16, out_le16, 2)
INDIRECT_PCI_OP(write, dword, u32, out_le32, 0)
#endif
void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
{
pci_set_ops(hose,
indirect_read_config_byte,
indirect_read_config_word,
indirect_read_config_dword,
indirect_write_config_byte,
indirect_write_config_word,
indirect_write_config_dword);
hose->cfg_addr = (unsigned int *) cfg_addr;
hose->cfg_data = (unsigned char *) cfg_data;
}
#endif
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