tegra2: Add support for Compal Paz00 (Toshiba AC100)

The Toshiba AC100 (Compal code-name Paz00, aka Dynabook AZ) is a netbook
derived from the NVIDIA Tegra Harmony reference board. It ships with
Android, but is often repurposed to run Linux. This patch adds just enough
support to get a U-Boot serial console, and the ability access built-in
eMMC and the external SD slot.

v2:
* Rebased on latest HEAD, incorporated changes made to other board files.
* Moved board files from board/nvidia to board/compal.
* Switched to correct odmdata value. This required add the previous patch
  to fix U-Boot's interpretation of the odmdata RAM size field.
* Removed nvmem= from default Linux kernel command-line; no drivers use the
  reserved memory yet, so there's no point reserving it.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

1 files changed, 81 insertions, 0 deletions

diff --git a/board/compal/paz00/paz00.c b/board/compal/paz00/paz00.c
new file mode 100644
index 0000000..3b48917
--- /dev/null
+++ b/board/compal/paz00/paz00.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2010-2012, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * 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 and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/tegra2.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 Paz00 - no conflict w/SPI.
+ */
+void gpio_config_uart(void)
+{
+}
+
+#ifdef CONFIG_TEGRA2_MMC
+/*
+ * Routine: pin_mux_mmc
+ * Description: setup the pin muxes/tristate values for the SDMMC(s)
+ */
+static void pin_mux_mmc(void)
+{
+	/* SDMMC4: config 3, x8 on 2nd set of pins */
+	pinmux_set_func(PINGRP_ATB, PMUX_FUNC_SDIO4);
+	pinmux_set_func(PINGRP_GMA, PMUX_FUNC_SDIO4);
+	pinmux_set_func(PINGRP_GME, PMUX_FUNC_SDIO4);
+
+	pinmux_tristate_disable(PINGRP_ATB);
+	pinmux_tristate_disable(PINGRP_GMA);
+	pinmux_tristate_disable(PINGRP_GME);
+
+	/* SDMMC1: SDIO1_CLK, SDIO1_CMD, SDIO1_DAT[3:0] */
+	pinmux_set_func(PINGRP_SDMMC1, PMUX_FUNC_SDIO1);
+
+	pinmux_tristate_disable(PINGRP_SDMMC1);
+
+	/* For power GPIO PV1 */
+	pinmux_tristate_disable(PINGRP_UAC);
+	/* For CD GPIO PI5 */
+	pinmux_tristate_disable(PINGRP_ATC);
+}
+
+/* this is a weak define that we are overriding */
+int board_mmc_init(bd_t *bd)
+{
+	debug("board_mmc_init called\n");
+
+	/* Enable muxes, etc. for SDMMC controllers */
+	pin_mux_mmc();
+
+	debug("board_mmc_init: init eMMC\n");
+	/* init dev 0, eMMC chip, with 4-bit bus */
+	/* The board has an 8-bit bus, but 8-bit doesn't work yet */
+	tegra2_mmc_init(0, 4, -1, -1);
+
+	debug("board_mmc_init: init SD slot\n");
+	/* init dev 3, SD slot, with 4-bit bus */
+	tegra2_mmc_init(3, 4, GPIO_PV1, GPIO_PI5);
+
+	return 0;
+}
+#endif