GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/board/avionic-design/common/tamonten-ng.c

@@ -0,0 +1,92 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2013
+ * Avionic Design GmbH <www.avionic-design.de>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/gp_padctrl.h>
+#include <asm/arch/gpio.h>
+#include <asm/gpio.h>
+#include "pinmux-config-tamonten-ng.h"
+#include <i2c.h>
+
+#define PMU_I2C_ADDRESS		0x2D
+
+#define PMU_REG_LDO5		0x32
+
+#define PMU_REG_LDO_HIGH_POWER	1
+
+/* Voltage selection for the LDOs with 100mV resolution */
+#define PMU_REG_LDO_SEL_100(mV)	((((mV - 1000) / 100) + 2) << 2)
+
+#define PMU_REG_LDO_100(st, mV)	(PMU_REG_LDO_##st | PMU_REG_LDO_SEL_100(mV))
+
+#define PMU_LDO5(st, mV)	PMU_REG_LDO_100(st, mV)
+
+void pinmux_init(void)
+{
+	pinmux_config_pingrp_table(tamonten_ng_pinmux_common,
+		ARRAY_SIZE(tamonten_ng_pinmux_common));
+	pinmux_config_pingrp_table(unused_pins_lowpower,
+		ARRAY_SIZE(unused_pins_lowpower));
+
+	/* Initialize any non-default pad configs (APB_MISC_GP regs) */
+	pinmux_config_drvgrp_table(tamonten_ng_padctrl,
+		ARRAY_SIZE(tamonten_ng_padctrl));
+}
+
+void gpio_early_init(void)
+{
+	/* Turn on the alive signal */
+	gpio_request(TEGRA_GPIO(V, 2), "ALIVE");
+	gpio_direction_output(TEGRA_GPIO(V, 2), 1);
+
+	/* Remove the reset on the external periph */
+	gpio_request(TEGRA_GPIO(I, 4), "nRST_PERIPH");
+	gpio_direction_output(TEGRA_GPIO(I, 4), 1);
+}
+
+void pmu_write(uchar reg, uchar data)
+{
+	struct udevice *dev;
+	int ret;
+
+	ret = i2c_get_chip_for_busnum(4, PMU_I2C_ADDRESS, 1, &dev);
+	if (ret) {
+		debug("%s: Cannot find PMIC I2C chip\n", __func__);
+		return;
+	}
+	dm_i2c_write(dev, reg, &data, 1);
+}
+
+/*
+ * Do I2C/PMU writes to bring up SD card bus power
+ *
+ */
+void board_sdmmc_voltage_init(void)
+{
+	/* Enable LDO5 with 3.3v for SDMMC3 */
+	pmu_write(PMU_REG_LDO5, PMU_LDO5(HIGH_POWER, 3300));
+
+	/* Switch the power on */
+	gpio_request(TEGRA_GPIO(J, 2), "EN_3V3_EMMC");
+	gpio_direction_output(TEGRA_GPIO(J, 2), 1);
+}
+
+/*
+ * Routine: pin_mux_mmc
+ * Description: setup the MMC muxes, power rails, etc.
+ */
+void pin_mux_mmc(void)
+{
+	/*
+	 * NOTE: We don't do mmc-specific pin muxes here.
+	 * They were done globally in pinmux_init().
+	 */
+
+	/* Bring up the SDIO1 power rail */
+	board_sdmmc_voltage_init();
+}