tegra: Whistler board support

Whistler is a highly configurable Tegra evaluation and development board.
This change adds support for the following specific configuration:

E1120 motherboard
E1108 CPU board
E1116 PMU board

The motherboard configuration switches are set as follows:
SW1=0 SW2=0 SW3=5
S1/S2/S3/S4 all on, except S3 7/8 are off.

Other combinations of daugher boards may work to varying degrees, but will
likely require some SW adjustment.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>

3 files changed, 231 insertions, 0 deletions

diff --git a/board/nvidia/dts/tegra2-whistler.dts b/board/nvidia/dts/tegra2-whistler.dts
new file mode 100644
index 0000000..b22d407
--- /dev/null
+++ b/board/nvidia/dts/tegra2-whistler.dts
@@ -0,0 +1,67 @@
+/dts-v1/;
+
+/include/ ARCH_CPU_DTS
+
+/ {
+	model = "NVIDIA Tegra2 Whistler evaluation board";
+	compatible = "nvidia,whistler", "nvidia,tegra20";
+
+	aliases {
+		i2c0 = "/i2c@7000d000";
+		usb0 = "/usb@c5008000";
+		usb1 = "/usb@c5000000";
+	};
+
+	memory {
+		device_type = "memory";
+		reg = < 0x00000000 0x20000000 >;
+	};
+
+	clocks {
+		osc {
+			clock-frequency = <12000000>;
+		};
+	};
+
+	clock@60006000 {
+		clocks = <&clk_32k &osc>;
+	};
+
+	serial@70006000 {
+		clock-frequency = < 216000000 >;
+	};
+
+	i2c@7000c000 {
+		status = "disabled";
+	};
+
+	i2c@7000c400 {
+		status = "disabled";
+	};
+
+	i2c@7000c500 {
+		status = "disabled";
+	};
+
+	i2c@7000d000 {
+		clock-frequency = <100000>;
+
+		pmic@3c {
+			compatible = "maxim,max8907b";
+			reg = <0x3c>;
+
+			clk_32k: clock {
+				compatible = "fixed-clock";
+				/*
+				 * leave out for now due to CPP:
+				 * #clock-cells = <0>;
+				 */
+				clock-frequency = <32768>;
+			};
+		};
+	};
+
+	usb@c5004000 {
+		status = "disabled";
+	};
+};
diff --git a/board/nvidia/whistler/Makefile b/board/nvidia/whistler/Makefile
new file mode 100644
index 0000000..a910577
--- /dev/null
+++ b/board/nvidia/whistler/Makefile
@@ -0,0 +1,48 @@
+#
+#  (C) Copyright 2010-2012
+#  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
+#
+
+include $(TOPDIR)/config.mk
+
+ifneq ($(OBJTREE),$(SRCTREE))
+$(shell mkdir -p $(obj)../common)
+endif
+
+LIB	= $(obj)lib$(BOARD).o
+
+COBJS	:= $(BOARD).o
+
+SRCS	:= $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS))
+
+$(LIB):	$(obj).depend $(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/board/nvidia/whistler/whistler.c b/board/nvidia/whistler/whistler.c
new file mode 100644
index 0000000..1c2f33f
--- /dev/null
+++ b/board/nvidia/whistler/whistler.c
@@ -0,0 +1,116 @@
+/*
+ *  (C) Copyright 2010-2012
+ *  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
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <asm/io.h>
+#include <asm/arch/tegra2.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/funcmux.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/mmc.h>
+#include <asm/gpio.h>
+#ifdef CONFIG_TEGRA2_MMC
+#include <mmc.h>
+#endif
+
+/*
+ * Routine: gpio_config_uart
+ * Description: Does nothing on Whistler - no UART-related GPIOs.
+ */
+void gpio_config_uart(void)
+{
+}
+
+/*
+ * Routine: pin_mux_mmc
+ * Description: setup the pin muxes/tristate values for the SDMMC(s)
+ */
+static void pin_mux_mmc(void)
+{
+	funcmux_select(PERIPH_ID_SDMMC3, FUNCMUX_SDMMC3_SDB_SLXA_8BIT);
+	funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATC_ATD_8BIT);
+}
+
+/* this is a weak define that we are overriding */
+int board_mmc_init(bd_t *bd)
+{
+	uchar val;
+	int ret;
+
+	debug("board_mmc_init called\n");
+
+	/* Turn on MAX8907B LDO12 to 2.8V for J40 power */
+	ret = i2c_set_bus_num(0);
+	if (ret)
+		printf("i2c_set_bus_num failed: %d\n", ret);
+	val = 0x29;
+	ret = i2c_write(0x3c, 0x46, 1, &val, 1);
+	if (ret)
+		printf("i2c_write 0 0x3c 0x46 failed: %d\n", ret);
+	val = 0x00;
+	ret = i2c_write(0x3c, 0x45, 1, &val, 1);
+	if (ret)
+		printf("i2c_write 0 0x3c 0x45 failed: %d\n", ret);
+	val = 0x1f;
+	ret = i2c_write(0x3c, 0x44, 1, &val, 1);
+	if (ret)
+		printf("i2c_write 0 0x3c 0x44 failed: %d\n", ret);
+
+	/* Enable muxes, etc. for SDMMC controllers */
+	pin_mux_mmc();
+
+	/* init dev 0 (SDMMC4), (J29 "HSMMC") with 8-bit bus */
+	tegra2_mmc_init(0, 8, -1, -1);
+
+	/* init dev 1 (SDMMC3), (J40 "SDIO3") with 8-bit bus */
+	tegra2_mmc_init(1, 8, -1, -1);
+
+	return 0;
+}
+
+/* this is a weak define that we are overriding */
+void pin_mux_usb(void)
+{
+	uchar val;
+	int ret;
+
+	/*
+	 * This is a hack. This should be represented in DT using the
+	 * vbus-gpio property. However, U-Boot's DT support doesn't
+	 * support any GPIO controller other than the Tegra's yet.
+	 */
+
+	/* Turn on TAC6416's GPIO 0+1 for USB1/3's VBUS */
+	ret = i2c_set_bus_num(0);
+	if (ret)
+		printf("i2c_set_bus_num failed: %d\n", ret);
+	val = 0x03;
+	ret = i2c_write(0x20, 2, 1, &val, 1);
+	if (ret)
+		printf("i2c_write 0 0x20 2 failed: %d\n", ret);
+	val = 0xfc;
+	ret = i2c_write(0x20, 6, 1, &val, 1);
+	if (ret)
+		printf("i2c_write 0 0x20 6 failed: %d\n", ret);
+}