Tegra30: Add/enable Cardhu build (T30 reference board)

This build is stripped down. It boots to the command prompt.
GPIO is the only peripheral supported. Others TBD.

include/configs/tegra-common.h now holds common config options
for Tegra SoCs.

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

1 files changed, 151 insertions, 0 deletions

diff --git a/board/nvidia/cardhu/cardhu.c.mmc b/board/nvidia/cardhu/cardhu.c.mmc
new file mode 100644
index 0000000..9e83b6f
--- /dev/null
+++ b/board/nvidia/cardhu/cardhu.c.mmc
@@ -0,0 +1,151 @@
+/*
+ *  (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 <asm/io.h>
+#include <asm/arch/pinmux.h>
+#include "pinmux-config-cardhu.h"
+
+#include <asm/arch/clock.h>
+#include <asm/arch/gp_padctrl.h>
+#include <asm/arch/pmu.h>
+#include <asm/arch/sdmmc.h>
+#include <asm/arch-tegra/mmc.h>
+#include <asm/arch-tegra/tegra_mmc.h>
+#include <mmc.h>
+#include <i2c.h>
+
+/*
+ * Routine: pinmux_init
+ * Description: Do individual peripheral pinmux configs
+ */
+void pinmux_init(void)
+{
+	pinmux_config_table(tegra3_pinmux_common,
+		ARRAY_SIZE(tegra3_pinmux_common));
+
+	pinmux_config_table(unused_pins_lowpower,
+		ARRAY_SIZE(unused_pins_lowpower));
+}
+
+#if defined(CONFIG_MMC)
+/*
+ * Routine: pin_mux_mmc
+ * Description: setup the pin muxes/tristate values for the SDMMC(s)
+ */
+static void pin_mux_mmc(void)
+{
+}
+
+/* Do I2C/PMU writes to bring up SD card bus power */
+static void board_sdmmc_voltage_init(void)
+{
+        uchar reg, data_buffer[1];
+        int i;
+
+        i2c_set_bus_num(0);             /* PMU is on bus 0 */
+
+        data_buffer[0] = 0x65;
+        reg = 0x32;
+
+        for (i = 0; i < MAX_I2C_RETRY; ++i) {
+                if (i2c_write(PMU_I2C_ADDRESS, reg, 1, data_buffer, 1))
+                        udelay(100);
+        }
+
+        data_buffer[0] = 0x09;
+        reg = 0x67;
+
+        for (i = 0; i < MAX_I2C_RETRY; ++i) {
+                if (i2c_write(PMU_I2C_ADDRESS, reg, 1, data_buffer, 1))
+                        udelay(100);
+        }
+}
+
+static void pad_init_mmc(struct tegra_mmc *reg)
+{
+        struct apb_misc_gp_ctlr *const gpc =
+                (struct apb_misc_gp_ctlr *)NV_PA_APB_MISC_GP_BASE;
+        struct sdmmc_ctlr *const sdmmc = (struct sdmmc_ctlr *)reg;
+        u32 val, offset = (unsigned int)reg;
+        u32 padcfg, padmask;
+
+        debug("%s: sdmmc address = %08x\n", __func__, (unsigned int)sdmmc);
+
+        /* Set the pad drive strength for SDMMC1 or 3 only */
+        if (offset != TEGRA_SDMMC1_BASE && offset != TEGRA_SDMMC3_BASE) {
+                debug("%s: settings are only valid for SDMMC1/SDMMC3!\n",
+                        __func__);
+                return;
+        }
+
+        /* Set pads as per T30 TRM, section 24.6.1.2 */
+        padcfg = (GP_SDIOCFG_DRVUP_SLWF | GP_SDIOCFG_DRVDN_SLWR | \
+                GP_SDIOCFG_DRVUP | GP_SDIOCFG_DRVDN);
+        padmask = 0x00000FFF;
+        if (offset == TEGRA_SDMMC1_BASE) {
+                val = readl(&gpc->sdio1cfg);
+                val &= padmask;
+                val |= padcfg;
+                writel(val, &gpc->sdio1cfg);
+        } else {                                /* SDMMC3 */
+                val = readl(&gpc->sdio3cfg);
+                val &= padmask;
+                val |= padcfg;
+                writel(val, &gpc->sdio3cfg);
+        }
+
+        val = readl(&sdmmc->sdmmc_sdmemcomp_pad_ctrl);
+        val &= 0xFFFFFFF0;
+        val |= MEMCOMP_PADCTRL_VREF;
+        writel(val, &sdmmc->sdmmc_sdmemcomp_pad_ctrl);
+
+        val = readl(&sdmmc->sdmmc_auto_cal_config);
+        val &= 0xFFFF0000;
+        val |= AUTO_CAL_PU_OFFSET | AUTO_CAL_PD_OFFSET | AUTO_CAL_ENABLED;
+        writel(val, &sdmmc->sdmmc_auto_cal_config);
+}
+
+/* this is a weak define that we are overriding */
+int board_mmc_init(bd_t *bd)
+{
+	debug("board_mmc_init called\n");
+
+	/* Turn on SD-card bus power */
+	board_sdmmc_voltage_init();
+
+	/* Set up the SDMMC pads as per the TRM */
+	pad_init_mmc((struct tegra_mmc *)TEGRA_SDMMC1_BASE);
+
+	/* Enable muxes, etc. for SDMMC controllers */
+	pin_mux_mmc();
+
+	/* init dev 0 (SDMMC4), ("HSMMC") with 8-bit bus */
+	tegra_mmc_init(0, 8, -1, -1);
+
+	/* init dev 1 (SDMMC0), ("SDIO") with 8-bit bus */
+	tegra_mmc_init(1, 8, -1, -1);
+
+	return 0;
+}
+#endif	/* MMC */