vial initial

quantum/via.c

@@ -47,6 +47,10 @@
 #include "tmk_core/common/eeprom.h"
 #include "version.h"  // for QMK_BUILDDATE used in EEPROM magic
 
+#ifdef VIAL_ENABLE
+#include "vial.h"
+#endif
+
 // Forward declare some helpers.
 #if defined(VIA_QMK_BACKLIGHT_ENABLE)
 void via_qmk_backlight_set_value(uint8_t *data);
@@ -383,6 +387,12 @@ void raw_hid_receive(uint8_t *data, uint8_t length) {
             bootloader_jump();
             break;
         }
+#ifdef VIAL_ENABLE
+        case 0xFE: {
+            vial_handle_cmd(data, length);
+            break;
+        }
+#endif
         default: {
             // The command ID is not known
             // Return the unhandled state

quantum/vial.c

@@ -0,0 +1,56 @@
+/* Copyright 2020 Ilya Zhuravlev
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include "protocol/usb_descriptor.h"
+
+#include "vial_generated_keyboard_definition.h"
+
+enum {
+    vial_get_size = 0x01,
+    vial_get_def = 0x02,
+};
+
+void vial_handle_cmd(uint8_t *msg, uint8_t length) {
+    /* All packets must be fixed 32 bytes */
+    if (length != RAW_EPSIZE)
+        return;
+
+    /* msg[0] is 0xFE -- prefix vial magic */
+    switch (msg[1]) {
+        /* Retrieve keyboard definition size */
+        case vial_get_size: {
+            uint32_t sz = sizeof(keyboard_definition);
+            msg[0] = sz & 0xFF;
+            msg[1] = (sz >> 8) & 0xFF;
+            msg[2] = (sz >> 16) & 0xFF;
+            msg[3] = (sz >> 24) & 0xFF;
+            break;
+        }
+        /* Retrieve 32-bytes block of the definition, page ID encoded within 2 bytes */
+        case vial_get_def: {
+            uint32_t page = msg[2] + (msg[3] << 8);
+            uint32_t start = page * RAW_EPSIZE;
+            uint32_t end = start + RAW_EPSIZE;
+            if (end < start || start >= sizeof(keyboard_definition))
+                return;
+            if (end > sizeof(keyboard_definition))
+                end = sizeof(keyboard_definition);
+            memcpy(msg, &keyboard_definition[start], end - start);
+            break;
+        }
+    }
+}

quantum/vial.h

@@ -0,0 +1,19 @@
+/* Copyright 2020 Ilya Zhuravlev
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+void vial_handle_cmd(uint8_t *data, uint8_t length);