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/*
* Copyright (C) 2007 Freescale Semiconductor, Inc.
*
* 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.
*/
#include <asm/mmu.h>
#include <asm/io.h>
#include <common.h>
#include <mpc83xx.h>
#include <pci.h>
#include <i2c.h>
#include <fdt_support.h>
#include <asm/fsl_i2c.h>
#include <asm/fsl_serdes.h>
#if defined(CONFIG_PCI)
static struct pci_region pci_regions[] = {
{
bus_start: CONFIG_SYS_PCI_MEM_BASE,
phys_start: CONFIG_SYS_PCI_MEM_PHYS,
size: CONFIG_SYS_PCI_MEM_SIZE,
flags: PCI_REGION_MEM | PCI_REGION_PREFETCH
},
{
bus_start: CONFIG_SYS_PCI_MMIO_BASE,
phys_start: CONFIG_SYS_PCI_MMIO_PHYS,
size: CONFIG_SYS_PCI_MMIO_SIZE,
flags: PCI_REGION_MEM
},
{
bus_start: CONFIG_SYS_PCI_IO_BASE,
phys_start: CONFIG_SYS_PCI_IO_PHYS,
size: CONFIG_SYS_PCI_IO_SIZE,
flags: PCI_REGION_IO
}
};
static struct pci_region pcie_regions_0[] = {
{
.bus_start = CONFIG_SYS_PCIE1_MEM_BASE,
.phys_start = CONFIG_SYS_PCIE1_MEM_PHYS,
.size = CONFIG_SYS_PCIE1_MEM_SIZE,
.flags = PCI_REGION_MEM,
},
{
.bus_start = CONFIG_SYS_PCIE1_IO_BASE,
.phys_start = CONFIG_SYS_PCIE1_IO_PHYS,
.size = CONFIG_SYS_PCIE1_IO_SIZE,
.flags = PCI_REGION_IO,
},
};
static struct pci_region pcie_regions_1[] = {
{
.bus_start = CONFIG_SYS_PCIE2_MEM_BASE,
.phys_start = CONFIG_SYS_PCIE2_MEM_PHYS,
.size = CONFIG_SYS_PCIE2_MEM_SIZE,
.flags = PCI_REGION_MEM,
},
{
.bus_start = CONFIG_SYS_PCIE2_IO_BASE,
.phys_start = CONFIG_SYS_PCIE2_IO_PHYS,
.size = CONFIG_SYS_PCIE2_IO_SIZE,
.flags = PCI_REGION_IO,
},
};
static int is_pex_x2(void)
{
const char *pex_x2 = getenv("pex_x2");
if (pex_x2 && !strcmp(pex_x2, "yes"))
return 1;
return 0;
}
void pci_init_board(void)
{
volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
volatile sysconf83xx_t *sysconf = &immr->sysconf;
volatile clk83xx_t *clk = (volatile clk83xx_t *)&immr->clk;
volatile law83xx_t *pci_law = immr->sysconf.pcilaw;
volatile law83xx_t *pcie_law = sysconf->pcielaw;
struct pci_region *reg[] = { pci_regions };
struct pci_region *pcie_reg[] = { pcie_regions_0, pcie_regions_1, };
u32 spridr = in_be32(&immr->sysconf.spridr);
int pex2 = is_pex_x2();
if (board_pci_host_broken())
goto skip_pci;
/* Enable all 5 PCI_CLK_OUTPUTS */
clk->occr |= 0xf8000000;
udelay(2000);
/* Configure PCI Local Access Windows */
pci_law[0].bar = CONFIG_SYS_PCI_MEM_PHYS & LAWBAR_BAR;
pci_law[0].ar = LBLAWAR_EN | LBLAWAR_512MB;
pci_law[1].bar = CONFIG_SYS_PCI_IO_PHYS & LAWBAR_BAR;
pci_law[1].ar = LBLAWAR_EN | LBLAWAR_1MB;
udelay(2000);
mpc83xx_pci_init(1, reg, 0);
skip_pci:
/* There is no PEX in MPC8379 parts. */
if (PARTID_NO_E(spridr) == SPR_8379)
return;
if (pex2)
fsl_setup_serdes(CONFIG_FSL_SERDES2, FSL_SERDES_PROTO_PEX_X2,
FSL_SERDES_CLK_100, FSL_SERDES_VDD_1V);
else
fsl_setup_serdes(CONFIG_FSL_SERDES2, FSL_SERDES_PROTO_PEX,
FSL_SERDES_CLK_100, FSL_SERDES_VDD_1V);
/* Configure the clock for PCIE controller */
clrsetbits_be32(&clk->sccr, SCCR_PCIEXP1CM | SCCR_PCIEXP2CM,
SCCR_PCIEXP1CM_1 | SCCR_PCIEXP2CM_1);
/* Deassert the resets in the control register */
out_be32(&sysconf->pecr1, 0xE0008000);
if (!pex2)
out_be32(&sysconf->pecr2, 0xE0008000);
udelay(2000);
/* Configure PCI Express Local Access Windows */
out_be32(&pcie_law[0].bar, CONFIG_SYS_PCIE1_BASE & LAWBAR_BAR);
out_be32(&pcie_law[0].ar, LBLAWAR_EN | LBLAWAR_512MB);
out_be32(&pcie_law[1].bar, CONFIG_SYS_PCIE2_BASE & LAWBAR_BAR);
out_be32(&pcie_law[1].ar, LBLAWAR_EN | LBLAWAR_512MB);
mpc83xx_pcie_init(pex2 ? 1 : 2, pcie_reg, 0);
}
void ft_pcie_fixup(void *blob, bd_t *bd)
{
const char *status = "disabled (PCIE1 is x2)";
if (!is_pex_x2())
return;
do_fixup_by_path(blob, "pci2", "status", status,
strlen(status) + 1, 1);
}
#endif /* CONFIG_PCI */
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