New port: Shanling Q1 native

- Audio playback works
- Touchscreen and buttons work
- Bootloader works and is capable of dual boot
- Plugins are working
- Cabbiev2 theme has been ported
- Stable for general usage

Thanks to Marc Aarts for porting Cabbiev2 and plugin bitmaps.

There's a few minor known issues:

- Bootloader must be installed manually using 'usbboot' as there is
  no support in jztool yet.

- Keymaps may be lacking, need further testing and feedback.

- Some plugins may not be fully adapted to the screen size and could
  benefit from further tweaking.

- LCD shows abnormal effects under some circumstances: for example,
  after viewing a mostly black screen an afterimage appears briefly
  when going back to a brightly-lit screen. Sudden power-off without
  proper shutdown of the backlight causes a "dissolving" effect.

- CW2015 battery reporting driver is buggy, and disabled for now.
  Battery reporting is currently voltage-based using the AXP192.

Change-Id: I635e83f02a880192c5a82cb0861ad3a61c137c3a

1 files changed, 140 insertions, 0 deletions

diff --git a/firmware/target/mips/ingenic_x1000/shanlingq1/power-shanlingq1.c b/firmware/target/mips/ingenic_x1000/shanlingq1/power-shanlingq1.c
new file mode 100644
index 0000000000..17fbe1cede
--- /dev/null
+++ b/firmware/target/mips/ingenic_x1000/shanlingq1/power-shanlingq1.c
@@ -0,0 +1,140 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   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.
+ *
+ ****************************************************************************/
+
+#include "power.h"
+#include "adc.h"
+#include "system.h"
+#include "axp-pmu.h"
+#ifdef HAVE_CW2015
+# include "cw2015.h"
+#endif
+#ifdef HAVE_USB_CHARGING_ENABLE
+# include "usb_core.h"
+#endif
+
+#include "i2c-x1000.h"
+
+/* TODO: Better(?) battery reporting for Q1 using CW2015 driver
+ *
+ * The CW2015 has its own quirks so the driver has to be more complicated
+ * than "read stuff from I2C," unfortunately. Without fixing the quirks it
+ * is probably worse than the simple voltage-based method.
+ *
+ * A bigger problem is that it shares an I2C bus with the AXP192, but when
+ * we attempt to communicate with both chips, they start returning bogus
+ * data intermittently. Ususally, reads will return 0 but sometimes they
+ * can return other nonzero bogus data. It could be that one or the other is
+ * pulling the bus line down inappropriately, or maybe the hardware does not
+ * respect the bus free time between start/stop conditions and one of the
+ * devices is getting confused.
+ */
+
+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)
+{
+    i2c_x1000_set_freq(AXP_PMU_BUS, I2C_FREQ_400K);
+    axp_init();
+#ifdef HAVE_CW2015
+    cw2015_init();
+#endif
+
+    /* Change supply voltage from the default of 1250 mV to 1200 mV,
+     * this matches the original firmware's settings. Didn't observe
+     * any obviously bad behavior at 1250 mV, but better to be safe. */
+    axp_supply_set_voltage(AXP_SUPPLY_DCDC2, 1200);
+
+    /* For now, just turn everything on... definitely the touchscreen
+     * is powered by one of the outputs */
+    i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
+                    AXP_REG_PWROUTPUTCTRL1, 0, 0x05, NULL);
+    i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
+                    AXP_REG_PWROUTPUTCTRL2, 0, 0x0f, NULL);
+    i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
+                    AXP_REG_DCDCWORKINGMODE, 0, 0xc0, NULL);
+
+    /* Delay to give power output time to stabilize */
+    mdelay(20);
+}
+
+#ifdef HAVE_USB_CHARGING_ENABLE
+void usb_charging_maxcurrent_change(int maxcurrent)
+{
+    axp_set_charge_current(maxcurrent);
+}
+#endif
+
+void power_off(void)
+{
+    axp_power_off();
+    while(1);
+}
+
+bool charging_state(void)
+{
+    return axp_battery_status() == AXP_BATT_CHARGING;
+}
+
+int _battery_voltage(void)
+{
+    /* CW2015 can also read battery voltage, but the AXP consistently
+     * reads ~20-30 mV higher so I suspect it's the "real" voltage. */
+    return axp_adc_read(ADC_BATTERY_VOLTAGE);
+}
+
+#if defined(HAVE_CW2015) && (CONFIG_BATTERY_MEASURE & PERCENTAGE_MEASURE) != 0
+int _battery_level(void)
+{
+    return cw2015_get_soc();
+}
+#endif
+
+#if defined(HAVE_CW2015) && (CONFIG_BATTERY_MEASURE & TIME_MEASURE) != 0
+int _battery_time(void)
+{
+    return cw2015_get_rrt();
+}
+#endif
+
+void adc_init(void)
+{
+}