Viewing file:  indirect_pci.c (1.95 KB) -rw-r--r--
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/*
* BK Id: SCCS/s.indirect_pci.c 1.10 09/08/01 15:47:42 paulus
*/
/*
* 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 <linux/kernel.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/pci-bridge.h>
#include <asm/machdep.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_dev *dev, int offset, type val) \
{ \
struct pci_controller *hose = dev->sysdata; \
\
out_be32(hose->cfg_addr, \
((offset & 0xfc) << 24) | (dev->devfn << 16) \
| (dev->bus->number << 8) | 0x80); \
cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
return PCIBIOS_SUCCESSFUL; \
}
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)
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)
static struct pci_ops indirect_pci_ops =
{
indirect_read_config_byte,
indirect_read_config_word,
indirect_read_config_dword,
indirect_write_config_byte,
indirect_write_config_word,
indirect_write_config_dword
};
void __init
setup_indirect_pci(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
{
hose->ops = &indirect_pci_ops;
hose->cfg_addr = (unsigned int *) ioremap(cfg_addr, 4);
hose->cfg_data = (unsigned char *) ioremap(cfg_data, 4);
}
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