[Keymap] Add BB8520 trackpad support for CrKbd (#5925)

* Add vlukash CrKbd keymap to support trackpad adapter.

The trackpad adapter uses Elite-C board that has five extra pins.
Also SPI pins are taken for trackpad, keymap config updates column data
pins for matrix scan.

* Update vlukash keymap

* Enable pointing devide, configure mouse BTN1

* Set TAPPING_TERM to 300

* Add support for the BlackBerry 8520 trackpad

* Add vlukash keymap for master-right no-trackpad version

* Remap backspace

* Set EXTRAKEY_ENABLE = yes

* Update thumb keys mappings

* Set bootloader to atmel-dfu

* Sync keymap

* Add scrolling support

* Make debug LEDS conditional

* Add support for both flex and no-flex PCBs

* Add readme and rename root folders

* Update readme file with blog link

* Fix readme file formatting

* Remove ADJUST keycode, code cleanup.

* Add Win key to the keymap.

1 files changed, 78 insertions, 0 deletions

diff --git a/keyboards/crkbd/keymaps/vlukash_trackpad_right/trackpad.c b/keyboards/crkbd/keymaps/vlukash_trackpad_right/trackpad.c
new file mode 100644
index 0000000000..afccb8c7ed
--- /dev/null
+++ b/keyboards/crkbd/keymaps/vlukash_trackpad_right/trackpad.c
@@ -0,0 +1,78 @@
+#include "trackpad.h"
+
+// bool isScrollingMode = false;
+bool isScrollMode = false;
+
+void pointing_device_init(void){
+
+  SPI_Init(SPI_SPEED_FCPU_DIV_8 | SPI_MODE_MASTER);
+
+  // Set as output
+  TP_RESET_INIT;
+  TP_SHUTDOWN_INIT;
+  TP_CS_INIT;
+  LVL_SHIFT_EN_INIT;
+
+  // Reset level shifter
+  LVL_SHIFT_EN_LO;
+  wait_ms(100);
+  LVL_SHIFT_EN_HI;
+
+  // Force a BB-8520 reset
+  TP_RESET_HI;
+  wait_ms(100);
+  TP_RESET_LO;
+
+  // Turn on BB-8520 trackpad
+  TP_SHUTDOWN_LO;
+
+  TP_CS_HI;
+}
+
+uint8_t readRegister(uint8_t address) {
+  uint8_t data;
+
+  TP_CS_LO;
+
+  // Read the data
+  SPI_TransferByte(address);
+  data = SPI_TransferByte(0x00);
+
+  TP_CS_HI;
+
+  return data;
+}
+
+void pointing_device_task(void){
+  uint8_t motion = readRegister(0x02);
+
+  // Motion has occurred on the trackpad
+  if (motion > 127) {
+
+  int8_t dx, dy;
+
+  if(TRACKPAD_CONNECTOR_VER == 1) {
+    dx = readRegister(0x03);
+    dy = -readRegister(0x04);
+  }
+  else {
+    dy = -readRegister(0x03);
+    dx = -readRegister(0x04);
+  }
+
+    report_mouse_t currentReport = pointing_device_get_report();
+    if (isScrollMode)
+    {
+      currentReport.h = dx/SCROLL_SPEED_DIVIDER;
+      currentReport.v = dy/SCROLL_SPEED_DIVIDER;
+    }
+    else
+    {
+      currentReport.x = dx * POINTER_SPEED_MULTIPLIER;
+      currentReport.y = dy * POINTER_SPEED_MULTIPLIER;
+    }
+
+    pointing_device_set_report(currentReport);
+    pointing_device_send();
+  }
+}