Import of the watch repository from Pebble

src/fw/drivers/qemu/qemu_battery.c

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "drivers/battery.h"
+#include "drivers/qemu/qemu_serial.h"
+#include "drivers/qemu/qemu_settings.h"
+
+#include "system/passert.h"
+#include "services/common/battery/battery_state.h"
+#include "services/common/battery/battery_curve.h"
+#include "system/logging.h"
+
+#include "util/math.h"
+#include "util/net.h"
+
+static uint16_t s_battery_mv = 4000;
+static bool s_usb_connected;
+static uint8_t s_percent = 100;
+
+void battery_init(void) {
+  s_usb_connected = qemu_setting_get(QemuSetting_DefaultPluggedIn);
+}
+
+// TODO: update whoever uses this function
+int battery_get_millivolts(void) {
+  return s_battery_mv;
+}
+
+bool battery_charge_controller_thinks_we_are_charging_impl(void) {
+  return s_usb_connected && (s_percent < 100);
+}
+
+bool battery_is_usb_connected_impl(void) {
+  return s_usb_connected;
+}
+
+void battery_set_charge_enable(bool charging_enabled) {
+  s_usb_connected = false;
+}
+
+void battery_set_fast_charge(bool fast_charge_enabled) {
+}
+
+
+void qemu_battery_msg_callack(const uint8_t *data, uint32_t len) {
+  QemuProtocolBatteryHeader *hdr = (QemuProtocolBatteryHeader *)data;
+  if (len != sizeof(*hdr)) {
+    PBL_LOG(LOG_LEVEL_ERROR, "Invalid packet length");
+    return;
+  }
+
+  PBL_LOG(LOG_LEVEL_DEBUG, "Got battery msg: pct: %d, charger_connected:%d",
+        hdr->battery_pct, hdr->charger_connected);
+
+  s_percent = MIN(100, hdr->battery_pct);
+  s_usb_connected = hdr->charger_connected;
+  s_battery_mv = battery_curve_lookup_voltage_by_percent(s_percent, hdr->charger_connected);
+
+  // Reset the time averaging so these new values take effect immediately
+  battery_state_reset_filter();
+
+  // Force a state machine update
+  battery_state_handle_connection_event(s_usb_connected);
+}
+
+