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/*
* board.c
*
* Board functions for B&R LEIT Board
*
* Copyright (C) 2013 Hannes Schmelzer <oe5hpm@oevsv.at>
* Bernecker & Rainer Industrieelektronik GmbH - http://www.br-automation.com
*
* SPDX-License-Identifier: GPL-2.0+
*
*/
#include <common.h>
#include <errno.h>
#include <spl.h>
#include <asm/arch/cpu.h>
#include <asm/arch/hardware.h>
#include <asm/arch/omap.h>
#include <asm/arch/ddr_defs.h>
#include <asm/arch/clock.h>
#include <asm/arch/gpio.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/mem.h>
#include <asm/io.h>
#include <asm/emif.h>
#include <asm/gpio.h>
#include <i2c.h>
#include <power/tps65217.h>
#include "../common/bur_common.h"
#include <lcd.h>
#include <watchdog.h>
DECLARE_GLOBAL_DATA_PTR;
/* --------------------------------------------------------------------------*/
/* -- defines for GPIO -- */
#define REPSWITCH (0+20) /* GPIO0_20 */
#if defined(CONFIG_SPL_BUILD)
/* TODO: check ram-timing ! */
static const struct ddr_data ddr3_data = {
.datardsratio0 = MT41K256M16HA125E_RD_DQS,
.datawdsratio0 = MT41K256M16HA125E_WR_DQS,
.datafwsratio0 = MT41K256M16HA125E_PHY_FIFO_WE,
.datawrsratio0 = MT41K256M16HA125E_PHY_WR_DATA,
};
static const struct cmd_control ddr3_cmd_ctrl_data = {
.cmd0csratio = MT41K256M16HA125E_RATIO,
.cmd0iclkout = MT41K256M16HA125E_INVERT_CLKOUT,
.cmd1csratio = MT41K256M16HA125E_RATIO,
.cmd1iclkout = MT41K256M16HA125E_INVERT_CLKOUT,
.cmd2csratio = MT41K256M16HA125E_RATIO,
.cmd2iclkout = MT41K256M16HA125E_INVERT_CLKOUT,
};
static struct emif_regs ddr3_emif_reg_data = {
.sdram_config = MT41K256M16HA125E_EMIF_SDCFG,
.ref_ctrl = MT41K256M16HA125E_EMIF_SDREF,
.sdram_tim1 = MT41K256M16HA125E_EMIF_TIM1,
.sdram_tim2 = MT41K256M16HA125E_EMIF_TIM2,
.sdram_tim3 = MT41K256M16HA125E_EMIF_TIM3,
.zq_config = MT41K256M16HA125E_ZQ_CFG,
.emif_ddr_phy_ctlr_1 = MT41K256M16HA125E_EMIF_READ_LATENCY,
};
static const struct ctrl_ioregs ddr3_ioregs = {
.cm0ioctl = MT41K256M16HA125E_IOCTRL_VALUE,
.cm1ioctl = MT41K256M16HA125E_IOCTRL_VALUE,
.cm2ioctl = MT41K256M16HA125E_IOCTRL_VALUE,
.dt0ioctl = MT41K256M16HA125E_IOCTRL_VALUE,
.dt1ioctl = MT41K256M16HA125E_IOCTRL_VALUE,
};
#ifdef CONFIG_SPL_OS_BOOT
/*
* called from spl_nand.c
* return 0 for loading linux, return 1 for loading u-boot
*/
int spl_start_uboot(void)
{
if (0 == gpio_get_value(REPSWITCH)) {
mdelay(1000);
printf("SPL: entering u-boot instead kernel image.\n");
return 1;
}
return 0;
}
#endif /* CONFIG_SPL_OS_BOOT */
#define OSC (V_OSCK/1000000)
static const struct dpll_params dpll_ddr3 = { 400, OSC-1, 1, -1, -1, -1, -1};
void am33xx_spl_board_init(void)
{
struct cm_perpll *const cmper = (struct cm_perpll *)CM_PER;
/*struct cm_wkuppll *const cmwkup = (struct cm_wkuppll *)CM_WKUP;*/
struct cm_dpll *const cmdpll = (struct cm_dpll *)CM_DPLL;
/*
* in TRM they write a reset value of 1 (=CLK_M_OSC) for the
* CLKSEL_TIMER6_CLK Register, in fact reset value is 0, so we need set
* the source of timer6 clk to CLK_M_OSC
*/
writel(0x01, &cmdpll->clktimer6clk);
/* enable additional clocks of modules which are accessed later */
u32 *const clk_domains[] = {
&cmper->lcdcclkstctrl,
0
};
u32 *const clk_modules_tsspecific[] = {
&cmper->lcdclkctrl,
&cmper->timer5clkctrl,
&cmper->timer6clkctrl,
0
};
do_enable_clocks(clk_domains, clk_modules_tsspecific, 1);
/* setup LCD-Pixel Clock */
writel(0x2, &cmdpll->clklcdcpixelclk); /* clock comes from perPLL M2 */
/* setup I2C */
enable_i2c_pin_mux();
i2c_set_bus_num(0);
i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE);
pmicsetup(0);
gpio_direction_output(64+29, 1); /* switch NAND_RnB to GPMC_WAIT1 */
gpio_direction_output(64+28, 1); /* switch MII2_CRS to GPMC_WAIT0 */
}
const struct dpll_params *get_dpll_ddr_params(void)
{
return &dpll_ddr3;
}
void sdram_init(void)
{
config_ddr(400, &ddr3_ioregs,
&ddr3_data,
&ddr3_cmd_ctrl_data,
&ddr3_emif_reg_data, 0);
}
#endif /* CONFIG_SPL_BUILD */
/* Basic board specific setup. Pinmux has been handled already. */
int board_init(void)
{
#if defined(CONFIG_HW_WATCHDOG)
hw_watchdog_init();
#endif
gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
#ifdef CONFIG_NAND
gpmc_init();
#endif
return 0;
}
#ifdef CONFIG_BOARD_LATE_INIT
int board_late_init(void)
{
if (0 == gpio_get_value(REPSWITCH)) {
lcd_position_cursor(1, 8);
lcd_puts(
"switching to network-console ... ");
setenv("bootcmd", "run netconsole");
}
return 0;
}
#endif /* CONFIG_BOARD_LATE_INIT */
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