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com.diozero.internal.board.allwinner.AllwinnerSun8iMmapGpio Maven / Gradle / Ivy
package com.diozero.internal.board.allwinner;
/*-
* #%L
* Organisation: diozero
* Project: diozero - Core
* Filename: AllwinnerSun8iMmapGpio.java
*
* This file is part of the diozero project. More information about this project
* can be found at https://www.diozero.com/.
* %%
* Copyright (C) 2016 - 2021 diozero
* %%
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
import java.nio.ByteOrder;
import org.tinylog.Logger;
import com.diozero.api.DeviceMode;
import com.diozero.api.GpioPullUpDown;
import com.diozero.internal.spi.MmapGpioInterface;
import com.diozero.util.MmapIntBuffer;
import com.diozero.util.SleepUtil;
/**
* https://wiki.friendlyarm.com/wiki/images/4/4b/Allwinner_H3_Datasheet_V1.2.pdf
* See https://github.com/friendlyarm/WiringNP/blob/master/wiringPi/wiringPi.c
*
*
* Banks of GPIOs A-L:
*
* A=0-31, B=32-63, C=64-95, D=96-127, E=128-159, F=160-192, G=192-223,
* H=224-255, I=256-287, J=288-319, K=320-351, L=352-383
*/
public class AllwinnerSun8iMmapGpio implements MmapGpioInterface {
private static final String GPIOMEM_DEVICE = "/dev/mem";
private static final int MEM_INFO = 1024;
private static final int PAGE_SIZE = 4 * MEM_INFO;
private static final int BLOCK_SIZE = 6 * MEM_INFO;
private static final int GPIOA_BASE = 0x01C20000;
private static final int GPIOA_OFFSET = 0x800;
private static final int GPIOA_INT_OFFSET = GPIOA_OFFSET / 4;
private static final int MAP_SIZE_A = BLOCK_SIZE * 10;
private boolean initialised;
private MmapIntBuffer gpioAMmapIntBuffer;
@Override
public synchronized void initialise() {
if (!initialised) {
gpioAMmapIntBuffer = new MmapIntBuffer(GPIOMEM_DEVICE, GPIOA_BASE, MAP_SIZE_A, ByteOrder.LITTLE_ENDIAN);
initialised = true;
}
}
@Override
public synchronized void close() {
if (initialised) {
gpioAMmapIntBuffer.close();
gpioAMmapIntBuffer = null;
}
}
@Override
public DeviceMode getMode(int gpio) {
/*-
int bank = gpio >> 5;
int index = gpio - (bank << 5);
int int_offset = ((bank * 36) + ((index >> 3) << 2)) / 4;
int shift = ((index - ((index >> 3) << 3)) << 2);
*/
int int_offset = (gpio >> 3) + 5 * (gpio >> 5);
int shift = (gpio % 8) << 2;
int mode_val = (gpioAMmapIntBuffer.get(GPIOA_INT_OFFSET + int_offset) >> shift) & 0b111;
DeviceMode mode;
switch (mode_val) {
case 0:
mode = DeviceMode.DIGITAL_INPUT;
break;
case 1:
mode = DeviceMode.DIGITAL_OUTPUT;
break;
case 2:
if (gpio == 11 || gpio == 12) {
mode = DeviceMode.I2C;
} else if (gpio >= 0 && gpio < 6 || gpio >= 198 && gpio < 202) {
mode = DeviceMode.SERIAL;
} else {
mode = DeviceMode.UNKNOWN;
}
break;
case 3:
if (gpio == 5) {
mode = DeviceMode.PWM_OUTPUT;
} else if (gpio >= 64 && gpio < 68) {
mode = DeviceMode.SPI;
} else {
mode = DeviceMode.UNKNOWN;
}
break;
case 7:
// I/O Disable
mode = DeviceMode.UNKNOWN;
break;
default:
Logger.warn("Unknown mode for gpio {}: {}", Integer.valueOf(gpio), Integer.valueOf(mode_val));
mode = DeviceMode.UNKNOWN;
}
return mode;
}
@Override
public void setMode(int gpio, DeviceMode mode) {
/*-
int bank = gpio >> 5;
int index = gpio - (bank << 5);
int int_offset = ((bank * 36) + ((index >> 3) << 2)) / 4;
int shift = ((index - ((index >> 3) << 3)) << 2);
*/
int int_offset = (gpio >> 3) + 5 * (gpio >> 5);
int shift = (gpio % 8) << 2;
int phyaddr = GPIOA_INT_OFFSET + int_offset;
int reg_val = gpioAMmapIntBuffer.get(phyaddr);
int mode_val;
switch (mode) {
case DIGITAL_INPUT:
mode_val = 0b000;
break;
case DIGITAL_OUTPUT:
mode_val = 0b001;
break;
case PWM_OUTPUT:
if (gpio == 5) {
mode_val = 0b011;
} else {
Logger.warn("Invalid mode ({}) for GPIO #{}", mode, Integer.valueOf(gpio));
return;
}
break;
default:
Logger.warn("Invalid mode ({}) for GPIO #{}", mode, Integer.valueOf(gpio));
return;
}
reg_val &= ~(0b111 << shift);
reg_val |= (mode_val << shift);
gpioAMmapIntBuffer.put(phyaddr, reg_val);
}
@Override
public void setPullUpDown(int gpio, GpioPullUpDown pud) {
/*-
* int bank = gpio >> 5;
* int index = gpio - (bank << 5);
* int sub = index >> 4;
* int sub_index = index - 16 * sub;
* int int_offset = ((bank * 36) + 0x1c + sub * 4) / 4;
*/
/*-
* Pull Registers
* 00: Disable, 01: Pull-up, 10: Pull-down
*
* Bank Offset R0 Offset R1 GPIOs
* PA (0) 0x1c (0-15), 0x2d (16-31) 0..31
* PB (1) 32..63
* PC (2) 0x64 (0-15), 0x68 (16-31) 64..95
* PD (3) 0x88 (0-15), 0x8c (16-31) 96..127
* PE (4) 0xac (0-15), 0xb0 (16-31) 128..159
* PF (5) 0xd0 (0-15), 0xd4 (16-31) 160..191
* PG (6) 0xf4 (0-15), 0xf8 (16-31) 192..223
* PH (7) 224..255
* PI (8) 256..287
* PJ (9) 288..319
* PK (a) 320..351
* PL (b) 0x1c (0-15), 0x20 (16-31) 352..383
*/
int bank = gpio >> 5; // equivalent to / 32
int reg = (gpio >> 4) % 2; // Register 0 or 1
int shift = (gpio % 16) << 1; // Shift 0..30
int int_offset = (0x1c + bank * 0x24) / 4 + reg;
int phyaddr = GPIOA_INT_OFFSET + int_offset;
int pud_val;
switch (pud) {
case PULL_UP:
pud_val = 0b01;
break;
case PULL_DOWN:
pud_val = 0b10;
break;
case NONE:
default:
pud_val = 0b00;
}
int reg_val = gpioAMmapIntBuffer.get(phyaddr);
reg_val &= ~(0b11 << shift);
reg_val |= (pud_val << shift);
gpioAMmapIntBuffer.put(phyaddr, reg_val);
SleepUtil.sleepMillis(1);
}
@Override
public boolean gpioRead(int gpio) {
/*-
int bank = gpio >> 5;
int int_offset = ((bank * 36) + 0x10) / 4;
int shift = gpio - (bank << 5);
*/
int int_offset = (gpio >> 5) * 9 + 4;
int shift = gpio % 32;
return ((gpioAMmapIntBuffer.get(GPIOA_INT_OFFSET + int_offset) >> shift) & 1) == 1;
}
@Override
public void gpioWrite(int gpio, boolean value) {
/*-
int bank = gpio >> 5;
int int_offset = ((bank * 36) + 0x10) / 4;
int shift = gpio - (bank << 5);
*/
int int_offset = (gpio >> 5) * 9 + 4;
int shift = gpio % 32;
int addr_int_offset = GPIOA_INT_OFFSET + int_offset;
int reg_val = gpioAMmapIntBuffer.get(addr_int_offset);
if (value) {
reg_val |= (1 << shift);
} else {
reg_val &= ~(1 << shift);
}
gpioAMmapIntBuffer.put(addr_int_offset, reg_val);
}
@SuppressWarnings("boxing")
public static void main(String[] args) {
// Computed values for GPIO mode register
for (int gpio = 0; gpio < 224; gpio++) {
int bank = gpio >> 5;
int index = gpio - (bank << 5);
int offset = ((bank * 36) + ((index >> 3) << 2)) / 4;
int shift = ((index - ((index >> 3) << 3)) << 2);
int my_bank = gpio >> 5;
int my_index = gpio % 32;
int my_offset = (gpio >> 3) + 5 * (gpio >> 5);
int my_shift = (gpio % 8) << 2;
if (bank != my_bank || index != my_index || offset != my_offset || shift != my_shift) {
System.out.format("Xx Mode for GPIO %d - bank: %d, index:%d, offset: 0x%02x, shift: %d%n", gpio, bank,
index, offset, shift);
System.out.format("My Mode for GPIO %d - bank: %d, index:%d, offset: 0x%02x, shift: %d%n", gpio,
my_bank, my_index, my_offset, my_shift);
}
System.out.format("My Mode for GPIO %d - bank: %d, index:%d, offset: 0x%02x, shift: %d%n", gpio, my_bank,
my_index, my_offset, my_shift);
}
// Computed values for GPIO value register
for (int gpio = 0; gpio < 224; gpio++) {
int bank = gpio >> 5;
int gpio_int_offset = ((bank * 36) + 0x10) / 4;
int shift = gpio - (bank << 5);
int my_bank = gpio / 32;
int my_offset = (gpio / 32) * 9 + 4;
int my_shift = gpio % 32;
if (bank != my_bank || gpio_int_offset != my_offset || shift != my_shift) {
System.out.format("Xx Value for GPIO %d - bank: %d, offset: 0x%02x, shift: %d%n", gpio, bank,
gpio_int_offset, shift);
System.out.format("My Value for GPIO %d - bank: %d, offset: 0x%02x, shift: %d%n", gpio, my_bank,
my_offset, my_shift);
}
}
// Computed values for GPIO pull up/down control
for (int gpio = 0; gpio < 224; gpio++) {
int bank = gpio >> 5;
int index = gpio - (bank << 5);
int sub = index >> 4;
int sub_index = index - 16 * sub;
int int_offset = ((bank * 36) + 0x1c + sub * 4) / 4;
int my_bank = gpio >> 5;
int my_index = gpio % 32;
int my_sub = (gpio >> 4) % 2;
int my_sub_index = gpio % 16;
int my_int_offset = (0x1c + my_bank * 0x24 + my_sub * 4) / 4;
if (bank != my_bank || index != my_index || sub != my_sub || sub_index != my_sub_index
|| int_offset != my_int_offset) {
System.out.format(
"Xx PUD for GPIO %d - bank: %d, index: %d, sub: %d, sub_index: %d, int_offset=0x%02x%n", gpio,
bank, index, sub, sub_index, int_offset);
System.out.format(
"My PUD for GPIO %d - bank: %d, index: %d, sub: %d, sub_index: %d, int_offset=0x%02x%n", gpio,
my_bank, my_index, my_sub, my_sub_index, my_int_offset);
}
}
for (int gpio = 0; gpio < 224; gpio++) {
int bank = gpio >> 5; // equivalent to / 32
int reg = (gpio >> 4) % 2;
int shift = (gpio % 16) << 1;
int offset = 0x1c + bank * 0x24 + reg * 4;
int int_offset = offset / 4;
System.out.format("My PUD for GPIO %d - bank: %d, reg: %d, shift: %d, offset: 0x%02x, int_offset: 0x%02x%n",
gpio, bank, reg, shift, offset, int_offset);
}
if (args.length < 1) {
System.out.println("Usage: " + AllwinnerSun8iMmapGpio.class.getName() + " ");
return;
}
int gpio = Integer.parseInt(args[0]);
try (AllwinnerSun8iMmapGpio mmap_gpio = new AllwinnerSun8iMmapGpio()) {
mmap_gpio.initialise();
System.out.println("Mode: " + mmap_gpio.getMode(gpio));
for (int i = 0; i < 20; i++) {
System.out.println("Mode for GPIO #" + gpio + ": " + mmap_gpio.getMode(gpio));
SleepUtil.sleepSeconds(1);
}
if (true) {
return;
}
for (int i = 0; i < 5; i++) {
System.out.println("GPIO#" + gpio);
mmap_gpio.setMode(gpio, DeviceMode.DIGITAL_OUTPUT);
System.out.println("Mode: " + mmap_gpio.getMode(gpio));
SleepUtil.sleepSeconds(0.5);
mmap_gpio.setMode(gpio, DeviceMode.DIGITAL_INPUT);
System.out.println("Mode: " + mmap_gpio.getMode(gpio));
SleepUtil.sleepSeconds(0.5);
}
mmap_gpio.setMode(gpio, DeviceMode.DIGITAL_OUTPUT);
for (int i = 0; i < 5; i++) {
System.out.println("Value: " + mmap_gpio.gpioRead(gpio));
mmap_gpio.gpioWrite(gpio, true);
System.out.println("Value: " + mmap_gpio.gpioRead(gpio));
System.out.println("Sleeping");
SleepUtil.sleepSeconds(0.5);
mmap_gpio.gpioWrite(gpio, false);
System.out.println("Value: " + mmap_gpio.gpioRead(gpio));
System.out.println("Sleeping");
SleepUtil.sleepSeconds(0.5);
}
int iterations = 1_000_000;
if (args.length > 1) {
iterations = Integer.parseInt(args[1]);
}
for (int i = 0; i < 3; i++) {
long start_ms = System.currentTimeMillis();
for (int j = 0; j < iterations; j++) {
mmap_gpio.gpioWrite(gpio, true);
mmap_gpio.gpioWrite(gpio, false);
}
long duration_ms = System.currentTimeMillis() - start_ms;
double frequency = iterations / (duration_ms / 1000.0);
System.out.format("Duration for %,d iterations: %,.3f s, frequency: %,.0f Hz%n",
Integer.valueOf(iterations), Float.valueOf(((float) duration_ms) / 1000),
Double.valueOf(frequency));
}
}
}
}
