tegra: Add EMC settings for Seaboard

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>

diff --git a/board/nvidia/common/Makefile b/board/nvidia/common/Makefile
index 3e748fdd20ba9fccf388f4b23c44bc5586cd8606..a93d4583e748088284928079ad84dcac2d70c34a 100644 (file)
--- a/board/nvidia/common/Makefile
+++ b/board/nvidia/common/Makefile
@@ -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)

diff --git a/board/nvidia/common/board.c b/board/nvidia/common/board.c
index 1d6b002702b6aad2da4fd2130230a454db5133cb..2e22133591c27347835832b483bb2ad63aa825ba 100644 (file)
--- a/board/nvidia/common/board.c
+++ b/board/nvidia/common/board.c
@@ -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();

diff --git a/board/nvidia/common/emc.c b/board/nvidia/common/emc.c
new file mode 100644 (file)
index 0000000..8e4290c
--- /dev/null
+++ b/board/nvidia/common/emc.c
@@ -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);
+}

diff --git a/board/nvidia/common/emc.h b/board/nvidia/common/emc.h
new file mode 100644 (file)
index 0000000..ec1b115
--- /dev/null
+++ b/board/nvidia/common/emc.h
@@ -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