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// SPDX-License-Identifier: GPL-2.0+
/*
* pci.c -- esd VME8349 PCI board support.
* Copyright (c) 2006 Wind River Systems, Inc.
* Copyright (C) 2006-2009 Freescale Semiconductor, Inc.
* Copyright (c) 2009 esd gmbh.
*
* Reinhard Arlt <reinhard.arlt@esd-electronics.com>
*
* Based on MPC8349 PCI support but w/o PIB related code.
*/
#include <init.h>
#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>
#include <linux/delay.h>
#include "vme8349pin.h"
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 VME reset
*/
clrsetbits_be32(&immr->gpio[1].dat,
GPIO2_TSI_POWERUP_RESET_N | GPIO2_TSI_PLL_RESET_N,
GPIO2_VME_RESET_N | GPIO2_L_RESET_EN_N);
setbits_be32(&immr->gpio[1].dir, GPIO2_TSI_PLL_RESET_N |
GPIO2_TSI_POWERUP_RESET_N |
GPIO2_VME_RESET_N |
GPIO2_L_RESET_EN_N);
clrbits_be32(&immr->gpio[1].dir, GPIO2_V_SCON);
udelay(200);
setbits_be32(&immr->gpio[1].dat, GPIO2_TSI_PLL_RESET_N);
udelay(200);
setbits_be32(&immr->gpio[1].dat, GPIO2_TSI_POWERUP_RESET_N);
udelay(600000);
clrbits_be32(&immr->gpio[1].dat, GPIO2_L_RESET_EN_N);
/* 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);
} else {
/*
* Release PCI RST Output signal
*/
out_be32(&immr->pci_ctrl[0].gcr, 0);
udelay(2000);
out_be32(&immr->pci_ctrl[0].gcr, 1);
}
}
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