Refactor build/config/keymaps.

* Move all headers to `include/zmk` directory.
* Update includes to reference them properly.
* Add `keymap.c` file from keymap, if found.
* Toplevel CONFIG_ZMK_BLE aggregate config setting.

include/zmk/ble.h

@@ -0,0 +1,7 @@
+
+#pragma once
+
+#include <zmk/keys.h>
+
+int zmk_ble_init();
+bool zmk_ble_handle_key_user(struct zmk_key_event *key_event);

include/zmk/endpoints.h

@@ -0,0 +1,6 @@
+#pragma once
+
+#include <zmk/keys.h>
+
+int zmk_endpoints_init();
+int zmk_endpoints_send_key_event(struct zmk_key_event key_event);

include/zmk/handlers.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <dt-bindings/zmk/keys.h>
+
+#include <zmk/keymap.h>
+#include <zmk/keys.h>
+
+void zmk_handle_key(struct zmk_key_event key_event);

include/zmk/hid.h

@@ -0,0 +1,107 @@
+#pragma once
+
+#include <usb/usb_device.h>
+#include <usb/class/usb_hid.h>
+
+#include <dt-bindings/zmk/keys.h>
+
+#include <zmk/keys.h>
+
+#define ZMK_HID_MAX_KEYCODE KC_APP
+
+static const u8_t zmk_hid_report_desc[] = {
+    /* USAGE_PAGE (Generic Desktop) */
+    HID_GI_USAGE_PAGE,
+    USAGE_GEN_DESKTOP,
+    /* USAGE (Keyboard) */
+    HID_LI_USAGE,
+    USAGE_GEN_DESKTOP_KEYBOARD,
+    /* COLLECTION (Application) */
+    HID_MI_COLLECTION,
+    COLLECTION_APPLICATION,
+    /* REPORT ID (1) */
+    HID_GI_REPORT_ID,
+    0x01,
+    /* USAGE_PAGE (Keypad) */
+    HID_GI_USAGE_PAGE,
+    USAGE_GEN_DESKTOP_KEYPAD,
+    /* USAGE_MINIMUM (Keyboard LeftControl) */
+    HID_LI_USAGE_MIN(1),
+    0xE0,
+    /* USAGE_MAXIMUM (Keyboard Right GUI) */
+    HID_LI_USAGE_MAX(1),
+    0xE7,
+    /* LOGICAL_MINIMUM (0) */
+    HID_GI_LOGICAL_MIN(1),
+    0x00,
+    /* LOGICAL_MAXIMUM (1) */
+    HID_GI_LOGICAL_MAX(1),
+    0x01,
+
+    /* REPORT_SIZE (1) */
+    HID_GI_REPORT_SIZE,
+    0x01,
+    /* REPORT_COUNT (8) */
+    HID_GI_REPORT_COUNT,
+    0x08,
+    /* INPUT (Data,Var,Abs) */
+    HID_MI_INPUT,
+    0x02,
+
+    /* USAGE_PAGE (Keypad) */
+    HID_GI_USAGE_PAGE,
+    USAGE_GEN_DESKTOP_KEYPAD,
+    /* LOGICAL_MINIMUM (0) */
+    HID_GI_LOGICAL_MIN(1),
+    0x00,
+    /* LOGICAL_MAXIMUM (101) */
+    HID_GI_LOGICAL_MAX(1),
+    0x01,
+    /* USAGE_MINIMUM (Reserved) */
+    HID_LI_USAGE_MIN(1),
+    0x00,
+    /* USAGE_MAXIMUM (Keyboard Application) */
+    HID_LI_USAGE_MAX(1),
+    ZMK_HID_MAX_KEYCODE,
+    /* REPORT_SIZE (8) */
+    HID_GI_REPORT_SIZE,
+    0x01,
+    /* REPORT_COUNT (6) */
+    HID_GI_REPORT_COUNT,
+    ZMK_HID_MAX_KEYCODE + 1,
+    /* INPUT (Data,Ary,Abs) */
+    HID_MI_INPUT,
+    0x02,
+    /* USAGE_PAGE (Keypad) */
+    HID_GI_USAGE_PAGE,
+    USAGE_GEN_DESKTOP_KEYPAD,
+    /* REPORT_SIZE (8) */
+    HID_GI_REPORT_SIZE,
+    0x02,
+    /* REPORT_COUNT (6) */
+    HID_GI_REPORT_COUNT,
+    0x01,
+    /* INPUT (Cnst,Var,Abs) */
+    HID_MI_INPUT,
+    0x03,
+    /* END_COLLECTION */
+    HID_MI_COLLECTION_END,
+};
+
+// struct zmk_hid_boot_report
+// {
+//     u8_t modifiers;
+//     u8_t _unused;
+//     u8_t keys[6];
+// } __packed;
+
+struct zmk_hid_report
+{
+    u8_t modifiers;
+    u8_t keys[13];
+} __packed;
+
+int zmk_hid_press_key(zmk_key key);
+int zmk_hid_release_key(zmk_key key);
+
+struct zmk_hid_report *zmk_hid_get_report();

include/zmk/hog.h

@@ -0,0 +1,9 @@
+
+#pragma once
+
+#include <zmk/keys.h>
+#include <zmk/hid.h>
+
+int zmk_hog_init();
+
+int zmk_hog_send_report(struct zmk_hid_report *report);

include/zmk/keymap.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <devicetree.h>
+#include <usb/usb_device.h>
+#include <usb/class/usb_hid.h>
+#include <dt-bindings/zmk/keys.h>
+
+#include <zmk/matrix.h>
+#include <zmk/keys.h>
+
+#define ZMK_KEYMAP_NODE DT_CHOSEN(zmk_keymap)
+#define ZMK_KEYMAP_LAYERS_LEN DT_PROP_LEN(ZMK_KEYMAP_NODE, layers)
+
+bool zmk_keymap_layer_activate(u8_t layer);
+bool zmk_keymap_layer_deactivate(u8_t layer);
+
+zmk_key
+zmk_keymap_keycode_from_position(u32_t row, u32_t column);

include/zmk/keys.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#include <zephyr.h>
+#include <dt-bindings/zmk/keys.h>
+
+typedef u64_t zmk_key;
+
+struct zmk_key_event
+{
+    zmk_key key;
+    bool pressed;
+};

include/zmk/kscan.h

@@ -0,0 +1,3 @@
+#pragma once
+
+int zmk_kscan_init(char *name);

include/zmk/matrix.h

@@ -0,0 +1,6 @@
+#pragma once
+
+#define ZMK_MATRIX_NODE_ID DT_CHOSEN(zmk_kscan)
+#define ZMK_MATRIX_ROWS DT_PROP_LEN(ZMK_MATRIX_NODE_ID,row_gpios)
+#define ZMK_MATRIX_COLS DT_PROP_LEN(ZMK_MATRIX_NODE_ID,col_gpios)
+

include/zmk/usb_hid.h

@@ -0,0 +1,14 @@
+#ifndef ZMK_USB_HID
+#define ZMK_USB_HID
+
+#include <usb/usb_device.h>
+#include <usb/class/usb_hid.h>
+
+#include <zmk/keys.h>
+#include <zmk/hid.h>
+
+int zmk_usb_hid_init();
+
+int zmk_usb_hid_send_report(const struct zmk_hid_report *report);
+
+#endif