arch/x86/lib/pci_type1.c

/*
 * (C) Copyright 2002
 * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/*
 * Support for type PCI configuration cycles.
 * based on pci_indirect.c
 */
#include <common.h>
#include <asm/io.h>
#include <pci.h>

#define cfg_read(val, addr, op)		(*val = op((int)(addr)))
#define cfg_write(val, addr, op)	op((val), (int)(addr))

#define TYPE1_PCI_OP(rw, size, type, op, mask)				\
static int								\
type1_##rw##_config_##size(struct pci_controller *hose,			\
			      pci_dev_t dev, int offset, type val)	\
{									\
	outl(dev | (offset & 0xfc) | 0x80000000, (int)hose->cfg_addr);	\
	cfg_##rw(val, hose->cfg_data + (offset & mask), op);		\
	return 0;							\
}

TYPE1_PCI_OP(read, byte, u8 *, inb, 3)
TYPE1_PCI_OP(read, word, u16 *, inw, 2)
TYPE1_PCI_OP(read, dword, u32 *, inl, 0)

TYPE1_PCI_OP(write, byte, u8, outb, 3)
TYPE1_PCI_OP(write, word, u16, outw, 2)
TYPE1_PCI_OP(write, dword, u32, outl, 0)

/* bus mapping constants (used for PCI core initialization) */
#define PCI_REG_ADDR		0x00000cf8
#define PCI_REG_DATA		0x00000cfc

void pci_setup_type1(struct pci_controller *hose)
{
	pci_set_ops(hose,
		    type1_read_config_byte,
		    type1_read_config_word,
		    type1_read_config_dword,
		    type1_write_config_byte,
		    type1_write_config_word,
		    type1_write_config_dword);

	hose->cfg_addr = (unsigned int *)PCI_REG_ADDR;
	hose->cfg_data = (unsigned char *)PCI_REG_DATA;
}