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tegra: Add EMC settings for Seaboard

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Set Seaboard to optimal memory settings based on the SOC in use (T20 or T25).

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Jimmy Zhang <jimmzhang@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
This commit is contained in:
Jimmy Zhang 2012-04-10 05:17:06 +00:00 committed by Albert ARIBAUD
parent 5aff021c61
commit c5b34a29ac
4 changed files with 95 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
board/nvidia/common/Makefile
View file

@ -27,6 +27,7 @@ LIB = $(obj)lib$(VENDOR).o
COBJS-y += board.o
COBJS-$(CONFIG_SPI_UART_SWITCH) += uart-spi-switch.o
COBJS-$(CONFIG_TEGRA_CLOCK_SCALING) += emc.o
COBJS := $(COBJS-y)
SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)

14
board/nvidia/common/board.c
View file

@ -23,6 +23,7 @@
#include <common.h>
#include <ns16550.h>
#include <linux/compiler.h>
#include <asm/io.h>
#include <asm/arch/tegra2.h>
#include <asm/arch/sys_proto.h>
@ -30,6 +31,7 @@
#include <asm/arch/board.h>
#include <asm/arch/clk_rst.h>
#include <asm/arch/clock.h>
#include <asm/arch/emc.h>
#include <asm/arch/pinmux.h>
#include <asm/arch/pmc.h>
#include <asm/arch/pmu.h>
@ -39,6 +41,7 @@
#include <asm/arch/usb.h>
#include <i2c.h>
#include "board.h"
#include "emc.h"
DECLARE_GLOBAL_DATA_PTR;
@ -82,6 +85,8 @@ static void power_det_init(void)
*/
int board_init(void)
{
__maybe_unused int err;
/* Do clocks and UART first so that printf() works */
clock_init();
clock_verify();
@ -105,8 +110,13 @@ int board_init(void)
# ifdef CONFIG_TEGRA_PMU
if (pmu_set_nominal())
debug("Failed to select nominal voltages\n");
# endif
#endif
# ifdef CONFIG_TEGRA_CLOCK_SCALING
err = board_emc_init();
if (err)
debug("Memory controller init failed: %d\n", err);
# endif
# endif /* CONFIG_TEGRA_PMU */
#endif /* CONFIG_TEGRA_I2C */
#ifdef CONFIG_USB_EHCI_TEGRA
pin_mux_usb();

53
board/nvidia/common/emc.c Normal file
View file

@ -0,0 +1,53 @@
/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/ap20.h>
#include <asm/arch/clk_rst.h>
#include <asm/arch/clock.h>
#include <asm/arch/emc.h>
#include <asm/arch/pmu.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/tegra2.h>
DECLARE_GLOBAL_DATA_PTR;
/* These rates are hard-coded for now, until fdt provides them */
#define EMC_SDRAM_RATE_T20 (333000 * 2 * 1000)
#define EMC_SDRAM_RATE_T25 (380000 * 2 * 1000)
int board_emc_init(void)
{
unsigned rate;
switch (tegra_get_chip_type()) {
default:
case TEGRA_SOC_T20:
rate = EMC_SDRAM_RATE_T20;
break;
case TEGRA_SOC_T25:
rate = EMC_SDRAM_RATE_T25;
break;
}
return tegra_set_emc(gd->fdt_blob, rate);
}

29
board/nvidia/common/emc.h Normal file
View file

@ -0,0 +1,29 @@
/*
* Copyright (c) 2011 The Chromium OS Authors.
* (C) Copyright 2010,2011 NVIDIA Corporation <www.nvidia.com>
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef _NVIDIA_EMC_H_
#define _NVIDIA_EMC_H_
int board_emc_init(void);
#endif