Changed orange-fork

2024-07-27 13:11:39 -04:00
1 parent 10e2150ec2
commit 0d2a167639
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+// Copyright 2022 The Periph Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+// This file contains pin mapping information that is specific to the Allwinner
+// H5 model.
+
+package allwinner
+
+import (
+	"fmt"
+	"strings"
+
+	"periph.io/x/conn/v3/pin"
+	"periph.io/x/host/v3/sysfs"
+)
+
+// mappingH6 describes the mapping of the H5 processor gpios to their
+// alternate functions.
+//
+// It omits the in & out functions which are available on all gpio.
+//
+// The mapping comes from the datasheet page 26:
+// https://linux-sunxi.org/images/3/30/H616_Datasheet_V1.0.pdf
+//
+//   - The datasheet uses TWI instead of I2C but it is renamed here for
+//     consistency.
+//   - RGMII means Reduced gigabit media-independent interface.
+//   - SDC means SDCard?
+//   - NAND connects to a NAND flash controller.
+//   - CSI and CCI are for video capture.
+var mappingH6 = map[string][5]pin.Func{
+	"PC0": {"NAND_WE", "SDC2_DS", "SPI0_CLK", "", "PA_EINT0"},
+	"PC1": {"NAND_ALE", "SDC2_RST", "", "", "PA_EINT1"},
+	"PC2": {"NAND_CLE", "", "SPI0_MOSI", "", "PA_EINT2"},
+	"PC3": {"NAND_CE1", "", "SPI0_CS0", "BOOT_SEL1", "PA_EINT3"},
+	"PC4": {"NAND_CE0", "", "SPI0_MIS0", "BOOT_SEL2", "PA_EINT4"},
+	"PC5": {"NAND_RE", "SDC2_CLK", "", "BOOT_SEL3", "PA_EINT5"},
+	"PC6": {"NAND_RB0", "SDC2_CMD", "", "BOOT_SEL4", "PA_EINT6"},
+	"PC7": {"NAND_RB1", "", "SPI0_CS1", "", "PA_EINT7"},
+	"PC8": {"NAND_DQ7", "SDC2_D3", "", "", "PA_EINT8"},
+
+	"PC9":  {"NAND_DQ6", "SDC2_D4", "", "", "PA_EINT9"},
+	"PC10": {"NAND_DQ5", "SDC2_D0", "", "", "PA_EINT10"},
+	"PC11": {"NAND_DQ4", "SDC2_D5", "", "", "PA_EINT11"},
+	"PC12": {"NAND_DQS", "", "", "", "PA_EINT12"},
+	"PC13": {"NAND_DQ3", "SDC2_D1", "", "", "PA_EINT13"},
+	"PC14": {"NAND_DQ2", "SDC2_D6", "", "", "PA_EINT14"},
+	"PC15": {"NAND_DQ1", "SDC2_D1", "SPI0_WP", "", "PA_EINT15"},
+	"PC16": {"NAND_DQ0", "SDC2_D7", "SPI0_HOLD", "", "PA_EINT16"},
+}
+
+// mapH6Pins uses mappingH6 to actually set the altFunc fields of all gpio
+// and mark them as available.
+//
+// It is called by the generic allwinner processor code if an H6 is detected.
+func mapH6Pins() error {
+	fmt.Println("Initializing H6 pins.")
+	for name, altFuncs := range mappingH6 {
+		pin := cpupins[name]
+		pin.altFunc = altFuncs
+		pin.available = true
+		if strings.Contains(string(altFuncs[4]), "_EINT") {
+			pin.supportEdge = true
+		}
+
+		// Initializes the sysfs corresponding pin right away.
+		pin.sysfsPin = sysfs.Pins[pin.Number()]
+	}
+	return nil
+}