New port: FiiO M3K on bare metal

Change-Id: I7517e7d5459e129dcfc9465c6fbd708619888fbe

1 files changed, 94 insertions, 0 deletions

diff --git a/firmware/export/axp173.h b/firmware/export/axp173.h
new file mode 100644
index 0000000000..60519138e1
--- /dev/null
+++ b/firmware/export/axp173.h
@@ -0,0 +1,94 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2021 Aidan MacDonald
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#ifndef __AXP173_H__
+#define __AXP173_H__
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#define ADC_ACIN_VOLTAGE        0
+#define ADC_ACIN_CURRENT        1
+#define ADC_VBUS_VOLTAGE        2
+#define ADC_VBUS_CURRENT        3
+#define ADC_INTERNAL_TEMP       4
+#define ADC_TS_INPUT            5
+#define ADC_BATTERY_VOLTAGE     6
+#define ADC_CHARGE_CURRENT      7
+#define ADC_DISCHARGE_CURRENT   8
+#define ADC_APS_VOLTAGE         9
+#define ADC_BATTERY_POWER       10
+#define NUM_ADC_CHANNELS        11
+
+/* ADC sampling rates */
+#define AXP173_ADC_RATE_25HZ    0
+#define AXP173_ADC_RATE_50HZ    1
+#define AXP173_ADC_RATE_100HZ   2
+#define AXP173_ADC_RATE_200HZ   3
+
+/* Return values of axp173_battery_status() */
+#define AXP173_BATT_DISCHARGING   0
+#define AXP173_BATT_CHARGING      1
+#define AXP173_BATT_FULL          2
+
+/* Bits returned by axp173_input_status() */
+#define AXP173_INPUT_AC         (1 << 0)
+#define AXP173_INPUT_USB        (1 << 1)
+#define AXP173_INPUT_BATTERY    (1 << 2)
+#define AXP173_INPUT_EXTERNAL   (AXP173_INPUT_AC|AXP173_INPUT_USB)
+
+/* Must be called from power_init() to initialize the driver state */
+extern void axp173_init(void);
+
+/* Basic battery and power supply status */
+extern int axp173_battery_status(void);
+extern int axp173_input_status(void);
+
+/* ADC access -- ADCs which are not enabled will return INT_MIN if read.
+ * The output of axp173_adc_read() is normalized to appropriate units:
+ *
+ * - for voltages, the scale is millivolts
+ * - for currents, the scale is milliamps
+ * - for temperatures, the scale is tenths of a degree Celsius
+ * - for power, the scale is microwatts
+ *
+ * See the comment in axp173_adc_conv_raw() for raw value precision/scale.
+ */
+extern int axp173_adc_read(int adc);
+extern int axp173_adc_read_raw(int adc);
+extern int axp173_adc_conv_raw(int adc, int value);
+extern int axp173_adc_get_enabled(void);
+extern void axp173_adc_set_enabled(int adc_bits);
+extern int axp173_adc_get_rate(void);
+extern void axp173_adc_set_rate(int rate);
+
+/* - axp173_cc_read() reads the coulomb counters
+ * - axp173_cc_clear() resets both counters to zero
+ * - axp173_cc_enable() will stop/start the counters running
+ */
+extern void axp173_cc_read(uint32_t* charge, uint32_t* discharge);
+extern void axp173_cc_clear(void);
+extern void axp173_cc_enable(bool en);
+
+/* Debug menu */
+extern bool axp173_debug_menu(void);
+
+#endif /* __AXP173_H__ */