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https://github.com/AsahiLinux/u-boot
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7e1afb62a7
The MPC83xx SERDES control is different from the other FSL PPC chips. For now lets split it out so we can standardize on interfaces for determining of a device on SERDES is configured. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Kim Phillips <kim.phillips@freescale.com>
153 lines
4 KiB
C
153 lines
4 KiB
C
/*
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* Copyright (C) 2006-2009 Freescale Semiconductor, Inc.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*/
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#include <asm/mmu.h>
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#include <asm/io.h>
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#include <common.h>
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#include <mpc83xx.h>
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#include <pci.h>
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#include <i2c.h>
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#include <fdt_support.h>
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#include <asm/fsl_i2c.h>
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#include <asm/fsl_mpc83xx_serdes.h>
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static struct pci_region pci_regions[] = {
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{
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bus_start: CONFIG_SYS_PCI_MEM_BASE,
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phys_start: CONFIG_SYS_PCI_MEM_PHYS,
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size: CONFIG_SYS_PCI_MEM_SIZE,
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flags: PCI_REGION_MEM | PCI_REGION_PREFETCH
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},
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{
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bus_start: CONFIG_SYS_PCI_MMIO_BASE,
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phys_start: CONFIG_SYS_PCI_MMIO_PHYS,
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size: CONFIG_SYS_PCI_MMIO_SIZE,
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flags: PCI_REGION_MEM
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},
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{
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bus_start: CONFIG_SYS_PCI_IO_BASE,
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phys_start: CONFIG_SYS_PCI_IO_PHYS,
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size: CONFIG_SYS_PCI_IO_SIZE,
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flags: PCI_REGION_IO
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}
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};
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static struct pci_region pcie_regions_0[] = {
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{
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.bus_start = CONFIG_SYS_PCIE1_MEM_BASE,
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.phys_start = CONFIG_SYS_PCIE1_MEM_PHYS,
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.size = CONFIG_SYS_PCIE1_MEM_SIZE,
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.flags = PCI_REGION_MEM,
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},
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{
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.bus_start = CONFIG_SYS_PCIE1_IO_BASE,
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.phys_start = CONFIG_SYS_PCIE1_IO_PHYS,
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.size = CONFIG_SYS_PCIE1_IO_SIZE,
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.flags = PCI_REGION_IO,
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},
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};
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static struct pci_region pcie_regions_1[] = {
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{
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.bus_start = CONFIG_SYS_PCIE2_MEM_BASE,
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.phys_start = CONFIG_SYS_PCIE2_MEM_PHYS,
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.size = CONFIG_SYS_PCIE2_MEM_SIZE,
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.flags = PCI_REGION_MEM,
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},
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{
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.bus_start = CONFIG_SYS_PCIE2_IO_BASE,
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.phys_start = CONFIG_SYS_PCIE2_IO_PHYS,
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.size = CONFIG_SYS_PCIE2_IO_SIZE,
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.flags = PCI_REGION_IO,
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},
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};
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static int is_pex_x2(void)
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{
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const char *pex_x2 = getenv("pex_x2");
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if (pex_x2 && !strcmp(pex_x2, "yes"))
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return 1;
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return 0;
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}
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void pci_init_board(void)
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{
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volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
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volatile sysconf83xx_t *sysconf = &immr->sysconf;
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volatile clk83xx_t *clk = (volatile clk83xx_t *)&immr->clk;
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volatile law83xx_t *pci_law = immr->sysconf.pcilaw;
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volatile law83xx_t *pcie_law = sysconf->pcielaw;
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struct pci_region *reg[] = { pci_regions };
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struct pci_region *pcie_reg[] = { pcie_regions_0, pcie_regions_1, };
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u32 spridr = in_be32(&immr->sysconf.spridr);
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int pex2 = is_pex_x2();
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if (board_pci_host_broken())
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goto skip_pci;
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/* Enable all 5 PCI_CLK_OUTPUTS */
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clk->occr |= 0xf8000000;
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udelay(2000);
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/* Configure PCI Local Access Windows */
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pci_law[0].bar = CONFIG_SYS_PCI_MEM_PHYS & LAWBAR_BAR;
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pci_law[0].ar = LBLAWAR_EN | LBLAWAR_512MB;
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pci_law[1].bar = CONFIG_SYS_PCI_IO_PHYS & LAWBAR_BAR;
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pci_law[1].ar = LBLAWAR_EN | LBLAWAR_1MB;
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udelay(2000);
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mpc83xx_pci_init(1, reg, 0);
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skip_pci:
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/* There is no PEX in MPC8379 parts. */
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if (PARTID_NO_E(spridr) == SPR_8379)
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return;
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if (pex2)
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fsl_setup_serdes(CONFIG_FSL_SERDES2, FSL_SERDES_PROTO_PEX_X2,
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FSL_SERDES_CLK_100, FSL_SERDES_VDD_1V);
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else
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fsl_setup_serdes(CONFIG_FSL_SERDES2, FSL_SERDES_PROTO_PEX,
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FSL_SERDES_CLK_100, FSL_SERDES_VDD_1V);
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/* Configure the clock for PCIE controller */
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clrsetbits_be32(&clk->sccr, SCCR_PCIEXP1CM | SCCR_PCIEXP2CM,
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SCCR_PCIEXP1CM_1 | SCCR_PCIEXP2CM_1);
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/* Deassert the resets in the control register */
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out_be32(&sysconf->pecr1, 0xE0008000);
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if (!pex2)
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out_be32(&sysconf->pecr2, 0xE0008000);
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udelay(2000);
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/* Configure PCI Express Local Access Windows */
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out_be32(&pcie_law[0].bar, CONFIG_SYS_PCIE1_BASE & LAWBAR_BAR);
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out_be32(&pcie_law[0].ar, LBLAWAR_EN | LBLAWAR_512MB);
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out_be32(&pcie_law[1].bar, CONFIG_SYS_PCIE2_BASE & LAWBAR_BAR);
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out_be32(&pcie_law[1].ar, LBLAWAR_EN | LBLAWAR_512MB);
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mpc83xx_pcie_init(pex2 ? 1 : 2, pcie_reg, 0);
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}
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void ft_pcie_fixup(void *blob, bd_t *bd)
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{
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const char *status = "disabled (PCIE1 is x2)";
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if (!is_pex_x2())
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return;
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do_fixup_by_path(blob, "pci2", "status", status,
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strlen(status) + 1, 1);
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}
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