New Port: Eros Q Native

What works:
- LCD: 16-bit RGB565
- all buttons, including scrollwheel
- SD Card
- Battery level and charging/not charging status
- USB
- audio
- sample rate switching
- HP / LO detect, with "safe" fixed LO volume -
   LO volume will only be put to user-defined max volume
   if headphones are not present.
- rtc
- Plugins build, tried a couple and they seem OK
- Bootloader, installable to nand via usbboot

What doesn't work:
- Dual Boot
- power on/off has intermittent, low volume audio click
   (sometimes it's completely silent, sometimes there's
    a click)
- Audio uses 16-bit volume scaling, so clicking/popping
   is pretty bad at lower volumes - need 32 bit volume
   scaling, 24 bit I2S data
- USB HID keys not yet defined
- no jztool support

Unknowns:
- Stereo Switch pins: Direction select, AC_DC
   (probably not even hooked up)
- What is the actual purpose of the Stereo Swtich?
- How does the bluetooth module connect?

"Someday" stuff:
- get LCD working at higher bit depth
- Bluetooth

Change-Id: I70dda8fc092c6e3f4352f2245e4164193f803c33

1 files changed, 110 insertions, 0 deletions

diff --git a/firmware/target/mips/ingenic_x1000/erosqnative/power-erosqnative.c b/firmware/target/mips/ingenic_x1000/erosqnative/power-erosqnative.c
new file mode 100644
index 0000000000..c466db66b1
--- /dev/null
+++ b/firmware/target/mips/ingenic_x1000/erosqnative/power-erosqnative.c
@@ -0,0 +1,110 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2021 Aidan MacDonald, Dana Conrad
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+// whole file copied from m3k
+
+#include "power.h"
+#include "adc.h"
+#include "system.h"
+#include "kernel.h"
+#ifdef HAVE_USB_CHARGING_ENABLE
+# include "usb_core.h"
+#endif
+#include "axp-pmu.h"
+#include "i2c-x1000.h"
+
+const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
+{
+    3470
+};
+
+/* the OF shuts down at this voltage */
+const unsigned short battery_level_shutoff[BATTERY_TYPES_COUNT] =
+{
+    3400
+};
+
+/* voltages (millivolt) of 0%, 10%, ... 100% when charging disabled */
+const unsigned short percent_to_volt_discharge[BATTERY_TYPES_COUNT][11] =
+{
+    { 3400, 3639, 3697, 3723, 3757, 3786, 3836, 3906, 3980, 4050, 4159 }
+};
+
+/* voltages (millivolt) of 0%, 10%, ... 100% when charging enabled */
+const unsigned short percent_to_volt_charge[11] =
+{
+      3485, 3780, 3836, 3857, 3890, 3930, 3986, 4062, 4158, 4185, 4196
+};
+
+void power_init(void)
+{
+    /* Initialize driver */
+    i2c_x1000_set_freq(2, I2C_FREQ_400K);
+    axp_init();
+
+    /* Set lowest sample rate */
+    axp_adc_set_rate(AXP_ADC_RATE_25HZ);
+
+    /* Ensure battery voltage ADC is enabled */
+    int bits = axp_adc_get_enabled();
+    bits |= (1 << ADC_BATTERY_VOLTAGE);
+    axp_adc_set_enabled(bits);
+
+    /* Turn on all power outputs */
+    i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
+                    AXP_REG_PWROUTPUTCTRL2, 0, 0x5f, NULL);
+    i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
+                    AXP_REG_DCDCWORKINGMODE, 0, 0xc0, NULL);
+
+    /* Set the default charging current. This is the same as the
+     * OF's setting, although it's not strictly within the USB spec. */
+    axp_set_charge_current(780);
+
+    /* Short delay to give power outputs time to stabilize */
+    mdelay(5);
+}
+
+#ifdef HAVE_USB_CHARGING_ENABLE
+void usb_charging_maxcurrent_change(int maxcurrent)
+{
+    axp_set_charge_current(maxcurrent);
+}
+#endif
+
+void adc_init(void)
+{
+}
+
+void power_off(void)
+{
+    axp_power_off();
+    while(1);
+}
+
+bool charging_state(void)
+{
+    return axp_battery_status() == AXP_BATT_CHARGING;
+}
+
+int _battery_voltage(void)
+{
+    return axp_adc_read(ADC_BATTERY_VOLTAGE);
+}