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Diffstat (limited to 'board/nvidia/seaboard/seaboard.c')
-rw-r--r--board/nvidia/seaboard/seaboard.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/board/nvidia/seaboard/seaboard.c b/board/nvidia/seaboard/seaboard.c
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+++ b/board/nvidia/seaboard/seaboard.c
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+/*
+ * (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
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/tegra2.h>
+#include <asm/arch/gpio.h>
+
+/*
+ * Routine: gpio_config_uart
+ * Description: Force GPIO_PI3 low on Seaboard so UART4 works.
+ */
+void gpio_config_uart(void)
+{
+ int gp = GPIO_PI3;
+ struct gpio_ctlr *gpio = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
+ struct gpio_ctlr_bank *bank = &gpio->gpio_bank[GPIO_BANK(gp)];
+ u32 val;
+
+ /* Enable UART via GPIO_PI3 (port 8, bit 3) so serial console works */
+ val = readl(&bank->gpio_config[GPIO_PORT(gp)]);
+ val |= 1 << GPIO_BIT(gp);
+ writel(val, &bank->gpio_config[GPIO_PORT(gp)]);
+
+ val = readl(&bank->gpio_out[GPIO_PORT(gp)]);
+ val &= ~(1 << GPIO_BIT(gp));
+ writel(val, &bank->gpio_out[GPIO_PORT(gp)]);
+
+ val = readl(&bank->gpio_dir_out[GPIO_PORT(gp)]);
+ val |= 1 << GPIO_BIT(gp);
+ writel(val, &bank->gpio_dir_out[GPIO_PORT(gp)]);
+}