117 lines
3.0 KiB
C
117 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* pci.c -- esd VME8349 PCI board support.
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* Copyright (c) 2006 Wind River Systems, Inc.
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* Copyright (C) 2006-2009 Freescale Semiconductor, Inc.
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* Copyright (c) 2009 esd gmbh.
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*
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* Reinhard Arlt <reinhard.arlt@esd-electronics.com>
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*
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* Based on MPC8349 PCI support but w/o PIB related code.
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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 <asm/fsl_i2c.h>
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#include "vme8349pin.h"
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static struct pci_region pci1_regions[] = {
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{
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bus_start: CONFIG_SYS_PCI1_MEM_BASE,
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phys_start: CONFIG_SYS_PCI1_MEM_PHYS,
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size: CONFIG_SYS_PCI1_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_PCI1_IO_BASE,
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phys_start: CONFIG_SYS_PCI1_IO_PHYS,
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size: CONFIG_SYS_PCI1_IO_SIZE,
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flags: PCI_REGION_IO
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},
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{
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bus_start: CONFIG_SYS_PCI1_MMIO_BASE,
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phys_start: CONFIG_SYS_PCI1_MMIO_PHYS,
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size: CONFIG_SYS_PCI1_MMIO_SIZE,
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flags: PCI_REGION_MEM
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},
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};
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/*
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* pci_init_board()
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*
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* NOTICE: PCI2 is not supported. There is only one
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* physical PCI slot on the board.
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*
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*/
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void
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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 clk83xx_t *clk = (volatile clk83xx_t *)&immr->clk;
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volatile law83xx_t *pci_law = immr->sysconf.pcilaw;
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struct pci_region *reg[] = { pci1_regions };
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u8 reg8;
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int monarch = 0;
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i2c_set_bus_num(1);
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/* Read the PCI_M66EN jumper setting */
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if ((i2c_read(CONFIG_SYS_I2C_8574_ADDR2, 0, 0, ®8, 1) == 0) ||
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(i2c_read(0x38 , 0, 0, ®8, 1) == 0)) {
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if (reg8 & 0x40) {
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clk->occr = 0xff000000; /* 66 MHz PCI */
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printf("PCI: 66MHz\n");
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} else {
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clk->occr = 0xffff0003; /* 33 MHz PCI */
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printf("PCI: 33MHz\n");
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}
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if (((reg8 & 0x01) == 0) || ((reg8 & 0x02) == 0))
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monarch = 1;
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} else {
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clk->occr = 0xffff0003; /* 33 MHz PCI */
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printf("PCI: 33MHz (I2C read failed)\n");
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}
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udelay(2000);
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/*
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* Assert/deassert VME reset
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*/
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clrsetbits_be32(&immr->gpio[1].dat,
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GPIO2_TSI_POWERUP_RESET_N | GPIO2_TSI_PLL_RESET_N,
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GPIO2_VME_RESET_N | GPIO2_L_RESET_EN_N);
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setbits_be32(&immr->gpio[1].dir, GPIO2_TSI_PLL_RESET_N |
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GPIO2_TSI_POWERUP_RESET_N |
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GPIO2_VME_RESET_N |
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GPIO2_L_RESET_EN_N);
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clrbits_be32(&immr->gpio[1].dir, GPIO2_V_SCON);
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udelay(200);
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setbits_be32(&immr->gpio[1].dat, GPIO2_TSI_PLL_RESET_N);
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udelay(200);
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setbits_be32(&immr->gpio[1].dat, GPIO2_TSI_POWERUP_RESET_N);
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udelay(600000);
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clrbits_be32(&immr->gpio[1].dat, GPIO2_L_RESET_EN_N);
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/* Configure PCI Local Access Windows */
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pci_law[0].bar = CONFIG_SYS_PCI1_MEM_PHYS & LAWBAR_BAR;
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pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_1G;
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pci_law[1].bar = CONFIG_SYS_PCI1_IO_PHYS & LAWBAR_BAR;
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pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_4M;
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udelay(2000);
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if (monarch == 0) {
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mpc83xx_pci_init(1, reg);
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} else {
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/*
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* Release PCI RST Output signal
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*/
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out_be32(&immr->pci_ctrl[0].gcr, 0);
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udelay(2000);
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out_be32(&immr->pci_ctrl[0].gcr, 1);
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}
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}
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