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/*
* pci.c -- esd VME8349 PCI board support.
* Copyright (c) 2006 Wind River Systems, Inc.
* Copyright (C) 2006-2009 Freescale Semiconductor, Inc.
*
* Based on MPC8349 PCI support but w/o PIB related code.
*
* 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
*
*/
#include <asm/mmu.h>
#include <asm/io.h>
#include <common.h>
#include <mpc83xx.h>
#include <pci.h>
#include <i2c.h>
#include <asm/fsl_i2c.h>
DECLARE_GLOBAL_DATA_PTR;
static struct pci_region pci1_regions[] = {
{
bus_start: CONFIG_SYS_PCI1_MEM_BASE,
phys_start: CONFIG_SYS_PCI1_MEM_PHYS,
size: CONFIG_SYS_PCI1_MEM_SIZE,
flags: PCI_REGION_MEM | PCI_REGION_PREFETCH
},
{
bus_start: CONFIG_SYS_PCI1_IO_BASE,
phys_start: CONFIG_SYS_PCI1_IO_PHYS,
size: CONFIG_SYS_PCI1_IO_SIZE,
flags: PCI_REGION_IO
},
{
bus_start: CONFIG_SYS_PCI1_MMIO_BASE,
phys_start: CONFIG_SYS_PCI1_MMIO_PHYS,
size: CONFIG_SYS_PCI1_MMIO_SIZE,
flags: PCI_REGION_MEM
},
};
/*
* pci_init_board()
*
* NOTICE: PCI2 is not supported. There is only one
* physical PCI slot on the board.
*
*/
void
pci_init_board(void)
{
volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
volatile clk83xx_t *clk = (volatile clk83xx_t *)&immr->clk;
volatile law83xx_t *pci_law = immr->sysconf.pcilaw;
struct pci_region *reg[] = { pci1_regions };
u8 reg8;
int monarch = 0;
i2c_set_bus_num(1);
/* Read the PCI_M66EN jumper setting */
if ((i2c_read(CONFIG_SYS_I2C_8574_ADDR2, 0, 0, ®8, 1) == 0) ||
(i2c_read(0x38 , 0, 0, ®8, 1) == 0)) {
if (reg8 & 0x40) {
clk->occr = 0xff000000; /* 66 MHz PCI */
printf("PCI: 66MHz\n");
} else {
clk->occr = 0xffff0003; /* 33 MHz PCI */
printf("PCI: 33MHz\n");
}
if (((reg8 & 0x01) == 0) || ((reg8 & 0x02) == 0))
monarch = 1;
} else {
clk->occr = 0xffff0003; /* 33 MHz PCI */
printf("PCI: 33MHz (I2C read failed)\n");
}
udelay(2000);
/*
* Assert/deassert PCI reset
*/
setbits_be32(&immr->gpio[0].dat, 0x00800000);
setbits_be32(&immr->gpio[0].dir, 0x00800000);
setbits_be32(&immr->gpio[1].dir, 0x08800000);
udelay(200);
setbits_be32(&immr->gpio[1].dat, 0x08000000);
udelay(200);
setbits_be32(&immr->gpio[1].dat, 0x08800000);
udelay(600000);
clrbits_be32(&immr->gpio[1].dat, 0x00100000);
/* Configure PCI Local Access Windows */
pci_law[0].bar = CONFIG_SYS_PCI1_MEM_PHYS & LAWBAR_BAR;
pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_1G;
pci_law[1].bar = CONFIG_SYS_PCI1_IO_PHYS & LAWBAR_BAR;
pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_4M;
udelay(2000);
if (monarch == 0)
mpc83xx_pci_init(1, reg, 0);
}
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