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

source/bootloader/u-boot-2020.01/arch/arm/mach-tegra/tegra114/funcmux.c

@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2010-2013, NVIDIA CORPORATION.  All rights reserved.
+ */
+
+/* Tegra114 high-level function multiplexing */
+
+#include <common.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/funcmux.h>
+#include <asm/arch/pinmux.h>
+
+int funcmux_select(enum periph_id id, int config)
+{
+	int bad_config = config != FUNCMUX_DEFAULT;
+
+	switch (id) {
+	case PERIPH_ID_UART4:
+		switch (config) {
+		case FUNCMUX_UART4_GMI:
+			pinmux_set_func(PMUX_PINGRP_GMI_A16_PJ7,
+					PMUX_FUNC_UARTD);
+			pinmux_set_func(PMUX_PINGRP_GMI_A17_PB0,
+					PMUX_FUNC_UARTD);
+			pinmux_set_func(PMUX_PINGRP_GMI_A18_PB1,
+					PMUX_FUNC_UARTD);
+			pinmux_set_func(PMUX_PINGRP_GMI_A19_PK7,
+					PMUX_FUNC_UARTD);
+
+			pinmux_set_io(PMUX_PINGRP_GMI_A16_PJ7, PMUX_PIN_OUTPUT);
+			pinmux_set_io(PMUX_PINGRP_GMI_A17_PB0, PMUX_PIN_INPUT);
+			pinmux_set_io(PMUX_PINGRP_GMI_A18_PB1, PMUX_PIN_INPUT);
+			pinmux_set_io(PMUX_PINGRP_GMI_A19_PK7, PMUX_PIN_OUTPUT);
+
+			pinmux_tristate_disable(PMUX_PINGRP_GMI_A16_PJ7);
+			pinmux_tristate_disable(PMUX_PINGRP_GMI_A17_PB0);
+			pinmux_tristate_disable(PMUX_PINGRP_GMI_A18_PB1);
+			pinmux_tristate_disable(PMUX_PINGRP_GMI_A19_PK7);
+			break;
+		}
+		break;
+
+	/* Add other periph IDs here as needed */
+
+	default:
+		debug("%s: invalid periph_id %d", __func__, id);
+		return -1;
+	}
+
+	if (bad_config) {
+		debug("%s: invalid config %d for periph_id %d", __func__,
+		      config, id);
+		return -1;
+	}
+	return 0;
+}