diff options
Diffstat (limited to 'u-boot/board/freescale/mpc837xemds/pci.c')
| -rw-r--r-- | u-boot/board/freescale/mpc837xemds/pci.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/u-boot/board/freescale/mpc837xemds/pci.c b/u-boot/board/freescale/mpc837xemds/pci.c new file mode 100644 index 0000000..edb3ff0 --- /dev/null +++ b/u-boot/board/freescale/mpc837xemds/pci.c @@ -0,0 +1,153 @@ +/* + * Copyright (C) 2006-2009 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_mpc83xx_serdes.h> + +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); +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); +} + +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); +} |