From 9f3333c6237f53475731ff002d2b0f1d5a2517c7 Mon Sep 17 00:00:00 2001
From: Werner Sembach <wse@tuxedocomputers.com>
Date: Wed, 16 Dec 2020 16:38:26 +0100
Subject: [PATCH] Initial commit

---
 .gitignore                 |   1 +
 CMakeLists.txt             |   3 +
 tuxedo-touchpad-switch.cpp | 114 +++++++++++++++++++++++++++++++++++++
 3 files changed, 118 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 CMakeLists.txt
 create mode 100644 tuxedo-touchpad-switch.cpp

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..84c048a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/build/
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..479762b
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,3 @@
+project(tuxedo-touchpad-switch)
+add_executable(tuxedo-touchpad-switch tuxedo-touchpad-switch.cpp)
+target_link_libraries(tuxedo-touchpad-switch udev)
diff --git a/tuxedo-touchpad-switch.cpp b/tuxedo-touchpad-switch.cpp
new file mode 100644
index 0000000..6303359
--- /dev/null
+++ b/tuxedo-touchpad-switch.cpp
@@ -0,0 +1,114 @@
+#include <linux/hidraw.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <libudev.h>
+#include <string.h>
+
+#include <vector>
+#include <string>
+
+const char *bus_str(int bus);
+
+static int get_touchpad_hidraw_devices(std::vector<std::string> *devnodes) {
+    struct udev *udev_context = udev_new();
+    if (!udev_context) {
+        perror("udev_new");
+        return -1;
+    }
+
+    struct udev_enumerate *hidraw_devices = udev_enumerate_new(udev_context);
+    if (!hidraw_devices) {
+        perror("udev_enumerate_new");
+        udev_unref(udev_context);
+        return -1;
+    }
+
+    if (udev_enumerate_add_match_subsystem(hidraw_devices, "hidraw") < 0) {
+        perror("udev_enumerate_add_match_subsystem");
+        udev_enumerate_unref(hidraw_devices);
+        udev_unref(udev_context);
+        return -1;
+    }
+
+    if (udev_enumerate_scan_devices(hidraw_devices) < 0) {
+        perror("udev_enumerate_scan_devices");
+        udev_enumerate_unref(hidraw_devices);
+        udev_unref(udev_context);
+        return -1;
+    }
+
+    struct udev_list_entry *hidraw_devices_iterator = udev_enumerate_get_list_entry(hidraw_devices);
+    if (!hidraw_devices_iterator) {
+        udev_enumerate_unref(hidraw_devices);
+        udev_unref(udev_context);
+        return -1;
+    }
+    struct udev_list_entry *hidraw_device_entry;
+    udev_list_entry_foreach(hidraw_device_entry, hidraw_devices_iterator) {
+        if (strstr(udev_list_entry_get_name(hidraw_device_entry), "i2c-UNIW0001")) {
+            struct udev_device *hidraw_device = udev_device_new_from_syspath(udev_context, udev_list_entry_get_name(hidraw_device_entry));
+            if (!hidraw_device) {
+                perror("udev_device_new_from_syspath");
+                continue;
+            }
+            
+            std::string devnode = udev_device_get_devnode(hidraw_device);
+            devnodes->push_back(devnode);
+            
+            udev_device_unref(hidraw_device);
+        }
+    }
+
+    udev_enumerate_unref(hidraw_devices);
+    udev_unref(udev_context);
+
+    return devnodes->size();;
+}
+
+int main(int argc, char *argv[]) {
+    if (argc < 2) {
+        printf("Usage: %s <enable|disable>\n", argv[0]);
+        return EXIT_SUCCESS;
+    }
+    
+    std::vector<std::string> devnodes;
+    int touchpad_count = get_touchpad_hidraw_devices(&devnodes);
+    if (touchpad_count < 0) {
+        return EXIT_FAILURE;
+    }
+    if (touchpad_count == 0) {
+        printf("No compatible touchpads found.\n");
+        return EXIT_SUCCESS;
+    }
+    
+    int result = EXIT_SUCCESS;
+    for (auto it = devnodes.begin(); it != devnodes.end(); ++it) {
+        int hidraw = open((*it).c_str(), O_RDWR|O_NONBLOCK);
+        if (hidraw < 0) {
+            perror("open");
+            result = EXIT_FAILURE;
+            continue;
+        }
+
+        char buffer[2] = {0x07, 0x03};
+        if (argv[1][0] == 'd') {
+            buffer[1] = 0x00;
+        }
+        int result = ioctl(hidraw, HIDIOCSFEATURE(sizeof(buffer)/sizeof(buffer[0])), buffer);
+        if (result < 0) {
+            perror("ioctl");
+            close(hidraw);
+            result = EXIT_FAILURE;
+            continue;
+        }
+        else {
+            printf("ioctl returned: %d\n", result);
+        }
+
+        close(hidraw);
+    }
+    
+    return result;
+}