Refactor display handling add Raspbian TFT display (#2998)

* Refactor display handling add Raspbian TFT display

* Add missed change

* Add static casts

* Add missed TFT refactor for RAK14014

* Add missed GPIO configuration

* Adds Native keyboard input option

* Get the ifdefs right

* CannedMessage send via queue, not run immediately.

* Fixup systemd service file

* Add display blanking for Raspberry Pi

* Add a couple missed key definitions

---------

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

src/input/LinuxInput.cpp

@@ -0,0 +1,179 @@
+#if ARCH_RASPBERRY_PI
+#include "LinuxInput.h"
+#include "configuration.h"
+
+#include "platform/portduino/PortduinoGlue.h"
+#include <assert.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <linux/input.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string>
+#include <sys/epoll.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+// Inspired by https://github.com/librerpi/rpi-tools/blob/master/keyboard-proxy/main.c which is GPL-v2
+
+LinuxInput::LinuxInput(const char *name) : concurrency::OSThread(name)
+{
+    this->_originName = name;
+}
+
+int32_t LinuxInput::runOnce()
+{
+
+    if (firstTime) {
+        if (settingsStrings[keyboardDevice] == "")
+            return disable();
+        fd = open(settingsStrings[keyboardDevice].c_str(), O_RDWR);
+        if (fd < 0)
+            return disable();
+        ret = ioctl(fd, EVIOCGRAB, (void *)1);
+        if (ret != 0)
+            return disable();
+
+        epollfd = epoll_create1(0);
+        assert(epollfd >= 0);
+
+        ev.events = EPOLLIN;
+        ev.data.fd = fd;
+        if (epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &ev)) {
+            perror("unable to epoll add");
+            return disable();
+        }
+        // This is the first time the OSThread library has called this function, so do port setup
+        firstTime = 0;
+    }
+
+    int nfds = epoll_wait(epollfd, events, MAX_EVENTS, 1);
+    if (nfds < 0) {
+        printf("%d ", nfds);
+        perror("epoll_wait failed");
+        return disable();
+    } else if (nfds == 0) {
+        return 50;
+    }
+
+    int keys = 0;
+    memset(report, 0, 8);
+    for (int i = 0; i < nfds; i++) {
+
+        struct input_event ev[64];
+        int rd = read(events[i].data.fd, ev, sizeof(ev));
+        assert(rd > ((signed int)sizeof(struct input_event)));
+        for (int j = 0; j < rd / ((signed int)sizeof(struct input_event)); j++) {
+            InputEvent e;
+            e.inputEvent = meshtastic_ModuleConfig_CannedMessageConfig_InputEventChar_NONE;
+            e.source = this->_originName;
+            e.kbchar = 0;
+            unsigned int type, code;
+            type = ev[j].type;
+            code = ev[j].code;
+            int value = ev[j].value;
+            // printf("Event: time %ld.%06ld, ", ev[j].time.tv_sec, ev[j].time.tv_usec);
+
+            if (type == EV_KEY) {
+                uint8_t mod = 0;
+
+                switch (code) {
+                case KEY_LEFTCTRL:
+                    mod = 0x01;
+                    break;
+                case KEY_RIGHTCTRL:
+                    mod = 0x10;
+                    break;
+                case KEY_LEFTSHIFT:
+                    mod = 0x02;
+                    break;
+                case KEY_RIGHTSHIFT:
+                    mod = 0x20;
+                    break;
+                case KEY_LEFTALT:
+                    mod = 0x04;
+                    break;
+                case KEY_RIGHTALT:
+                    mod = 0x40;
+                    break;
+                case KEY_LEFTMETA:
+                    mod = 0x08;
+                    break;
+                }
+                if (value == 1) {
+                    switch (code) {
+                    case KEY_LEFTCTRL:
+                        mod = 0x01;
+                        break;
+                    case KEY_RIGHTCTRL:
+                        mod = 0x10;
+                        break;
+                    case KEY_LEFTSHIFT:
+                        mod = 0x02;
+                        break;
+                    case KEY_RIGHTSHIFT:
+                        mod = 0x20;
+                        break;
+                    case KEY_LEFTALT:
+                        mod = 0x04;
+                        break;
+                    case KEY_RIGHTALT:
+                        mod = 0x40;
+                        break;
+                    case KEY_LEFTMETA:
+                        mod = 0x08;
+                        break;
+                    case KEY_ESC: // ESC
+                        e.inputEvent = meshtastic_ModuleConfig_CannedMessageConfig_InputEventChar_CANCEL;
+                        break;
+                    case KEY_BACK: // Back
+                        e.inputEvent = meshtastic_ModuleConfig_CannedMessageConfig_InputEventChar_BACK;
+                        // e.kbchar = key;
+                        break;
+
+                    case KEY_UP: // Up
+                        e.inputEvent = meshtastic_ModuleConfig_CannedMessageConfig_InputEventChar_UP;
+                        break;
+                    case KEY_DOWN: // Down
+                        e.inputEvent = meshtastic_ModuleConfig_CannedMessageConfig_InputEventChar_DOWN;
+                        break;
+                    case KEY_LEFT: // Left
+                        e.inputEvent = meshtastic_ModuleConfig_CannedMessageConfig_InputEventChar_LEFT;
+                        break;
+                        e.kbchar = 0xb4;
+                    case KEY_RIGHT: // Right
+                        e.inputEvent = meshtastic_ModuleConfig_CannedMessageConfig_InputEventChar_RIGHT;
+                        break;
+                        e.kbchar = 0xb7;
+                    case KEY_ENTER: // Enter
+                        e.inputEvent = meshtastic_ModuleConfig_CannedMessageConfig_InputEventChar_SELECT;
+                        break;
+                    default: // all other keys
+                        if (keymap[code]) {
+                            e.inputEvent = ANYKEY;
+                            e.kbchar = keymap[code];
+                        }
+                        break;
+                    }
+                }
+                if (ev[j].value) {
+                    modifiers |= mod;
+                } else {
+                    modifiers &= ~mod;
+                }
+                report[0] = modifiers;
+            }
+            if (e.inputEvent != meshtastic_ModuleConfig_CannedMessageConfig_InputEventChar_NONE) {
+                if (e.inputEvent == ANYKEY && (modifiers && 0x22))
+                    e.kbchar = uppers[e.kbchar]; // doesn't get punctuation. Meh.
+                this->notifyObservers(&e);
+            }
+        }
+    }
+
+    return 50; // Keyscan every 50msec to avoid key bounce
+}
+
+#endif

src/input/LinuxInput.h

@@ -0,0 +1,64 @@
+#pragma once
+#if ARCH_RASPBERRY_PI
+#include "InputBroker.h"
+#include "concurrency/OSThread.h"
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <linux/input.h>
+#include <map>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/epoll.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#define MAX_EVENTS 10
+
+class LinuxInput : public Observable<const InputEvent *>, public concurrency::OSThread
+{
+  public:
+    explicit LinuxInput(const char *name);
+
+  protected:
+    virtual int32_t runOnce() override;
+
+  private:
+    const char *_originName;
+    bool firstTime = 1;
+    int shift = 0;
+    char key = 0;
+    char prevkey = 0;
+
+    InputEvent eventqueue[50]; // The Linux API will return multiple keypresses at a time. Queue them to not miss any.
+    int queue_length = 0;
+    int queue_progress = 0;
+
+    struct epoll_event events[MAX_EVENTS];
+    int fd;
+    int ret;
+    uint8_t report[8];
+    int epollfd;
+    struct epoll_event ev;
+    uint8_t modifiers = 0;
+    std::map<int, char> keymap{
+        {KEY_A, 'a'},         {KEY_B, 'b'},           {KEY_C, 'c'},         {KEY_D, 'd'},          {KEY_E, 'e'},
+        {KEY_F, 'f'},         {KEY_G, 'g'},           {KEY_H, 'h'},         {KEY_I, 'i'},          {KEY_J, 'j'},
+        {KEY_K, 'k'},         {KEY_L, 'l'},           {KEY_M, 'm'},         {KEY_N, 'n'},          {KEY_O, 'o'},
+        {KEY_P, 'p'},         {KEY_Q, 'q'},           {KEY_R, 'r'},         {KEY_S, 's'},          {KEY_T, 't'},
+        {KEY_U, 'u'},         {KEY_V, 'v'},           {KEY_W, 'w'},         {KEY_X, 'x'},          {KEY_Y, 'y'},
+        {KEY_Z, 'z'},         {KEY_BACKSPACE, 0x08},  {KEY_SPACE, ' '},     {KEY_1, '1'},          {KEY_2, '2'},
+        {KEY_3, '3'},         {KEY_4, '4'},           {KEY_5, '5'},         {KEY_6, '6'},          {KEY_7, '7'},
+        {KEY_8, '8'},         {KEY_9, '9'},           {KEY_0, '0'},         {KEY_DOT, '.'},        {KEY_COMMA, ','},
+        {KEY_MINUS, '-'},     {KEY_EQUAL, '='},       {KEY_LEFTBRACE, '['}, {KEY_RIGHTBRACE, ']'}, {KEY_BACKSLASH, '\\'},
+        {KEY_SEMICOLON, ';'}, {KEY_APOSTROPHE, '\''}, {KEY_SLASH, '/'},     {KEY_TAB, 0x09}};
+    std::map<char, char> uppers{{'a', 'A'}, {'b', 'B'}, {'c', 'C'},  {'d', 'D'}, {'e', 'E'},  {'f', 'F'}, {'g', 'G'}, {'h', 'H'},
+                                {'i', 'I'}, {'j', 'J'}, {'k', 'K'},  {'l', 'L'}, {'m', 'M'},  {'n', 'N'}, {'o', 'O'}, {'p', 'P'},
+                                {'q', 'Q'}, {'r', 'R'}, {'s', 'S'},  {'t', 'T'}, {'u', 'U'},  {'v', 'V'}, {'w', 'W'}, {'x', 'X'},
+                                {'y', 'Y'}, {'z', 'Z'}, {'1', '!'},  {'2', '@'}, {'3', '#'},  {'4', '$'}, {'5', '%'}, {'6', '^'},
+                                {'7', '&'}, {'8', '*'}, {'9', '('},  {'0', ')'}, {'.', '>'},  {',', '<'}, {'-', '_'}, {'=', '+'},
+                                {'[', '{'}, {']', '}'}, {'\\', '|'}, {';', ':'}, {'\'', '"'}, {'/', '?'}};
+};
+#endif

src/input/LinuxInputImpl.cpp

@@ -0,0 +1,14 @@
+#if ARCH_RASPBERRY_PI
+#include "LinuxInputImpl.h"
+#include "InputBroker.h"
+
+LinuxInputImpl *aLinuxInputImpl;
+
+LinuxInputImpl::LinuxInputImpl() : LinuxInput("LinuxInput") {}
+
+void LinuxInputImpl::init()
+{
+    inputBroker->registerSource(this);
+}
+
+#endif

src/input/LinuxInputImpl.h

@@ -0,0 +1,21 @@
+#ifdef ARCH_RASPBERRY_PI
+#pragma once
+#include "LinuxInput.h"
+#include "main.h"
+
+/**
+ * @brief The idea behind this class to have static methods for the event handlers.
+ *      Check attachInterrupt() at RotaryEncoderInteruptBase.cpp
+ *      Technically you can have as many rotary encoders hardver attached
+ *      to your device as you wish, but you always need to have separate event
+ *      handlers, thus you need to have a RotaryEncoderInterrupt implementation.
+ */
+
+class LinuxInputImpl : public LinuxInput
+{
+  public:
+    LinuxInputImpl();
+    void init();
+};
+extern LinuxInputImpl *aLinuxInputImpl;
+#endif

src/input/TouchScreenImpl1.cpp

@@ -4,6 +4,10 @@
 #include "configuration.h"
 #include "modules/ExternalNotificationModule.h"
 
+#ifdef ARCH_RASPBERRY_PI
+#include "platform/portduino/PortduinoGlue.h"
+#endif
+
 TouchScreenImpl1 *touchScreenImpl1;
 
 TouchScreenImpl1::TouchScreenImpl1(uint16_t width, uint16_t height, bool (*getTouch)(int16_t *, int16_t *))
@@ -13,7 +17,14 @@ TouchScreenImpl1::TouchScreenImpl1(uint16_t width, uint16_t height, bool (*getTo
 
 void TouchScreenImpl1::init()
 {
-#if !HAS_TOUCHSCREEN
+#if ARCH_RASPBERRY_PI
+    if (settingsMap[touchscreenModule]) {
+        TouchScreenBase::init(true);
+        inputBroker->registerSource(this);
+    } else {
+        TouchScreenBase::init(false);
+    }
+#elif !HAS_TOUCHSCREEN
     TouchScreenBase::init(false);
     return;
 #else