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-rw-r--r--firmware/drivers/axp-pmu.c670
1 files changed, 670 insertions, 0 deletions
diff --git a/firmware/drivers/axp-pmu.c b/firmware/drivers/axp-pmu.c
new file mode 100644
index 0000000000..fd1126dbbf
--- /dev/null
+++ b/firmware/drivers/axp-pmu.c
@@ -0,0 +1,670 @@
+/***************************************************************************
+ * __________ __ ___.
+ * 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 "axp-pmu.h"
+#include "power.h"
+#include "system.h"
+#include "i2c-async.h"
+#include <string.h>
+
+/* Headers for the debug menu */
+#ifndef BOOTLOADER
+# include "action.h"
+# include "list.h"
+# include <stdio.h>
+#endif
+
+struct axp_adc_info {
+ uint8_t reg;
+ uint8_t en_reg;
+ uint8_t en_bit;
+};
+
+struct axp_supply_info {
+ uint8_t volt_reg;
+ uint8_t volt_reg_mask;
+ uint8_t en_reg;
+ uint8_t en_bit;
+ int min_mV;
+ int max_mV;
+ int step_mV;
+};
+
+static const struct axp_adc_info axp_adc_info[NUM_ADC_CHANNELS] = {
+ {0x56, AXP_REG_ADCENABLE1, 5}, /* ACIN_VOLTAGE */
+ {0x58, AXP_REG_ADCENABLE1, 4}, /* ACIN_CURRENT */
+ {0x5a, AXP_REG_ADCENABLE1, 3}, /* VBUS_VOLTAGE */
+ {0x5c, AXP_REG_ADCENABLE1, 2}, /* VBUS_CURRENT */
+ {0x5e, AXP_REG_ADCENABLE2, 7}, /* INTERNAL_TEMP */
+ {0x62, AXP_REG_ADCENABLE1, 1}, /* TS_INPUT */
+ {0x78, AXP_REG_ADCENABLE1, 7}, /* BATTERY_VOLTAGE */
+ {0x7a, AXP_REG_ADCENABLE1, 6}, /* CHARGE_CURRENT */
+ {0x7c, AXP_REG_ADCENABLE1, 6}, /* DISCHARGE_CURRENT */
+ {0x7e, AXP_REG_ADCENABLE1, 1}, /* APS_VOLTAGE */
+ {0x70, 0xff, 0}, /* BATTERY_POWER */
+};
+
+static const struct axp_supply_info axp_supply_info[AXP_NUM_SUPPLIES] = {
+#if HAVE_AXP_PMU == 192
+ [AXP_SUPPLY_DCDC1] = {
+ .volt_reg = 0x26,
+ .volt_reg_mask = 0x7f,
+ .en_reg = 0x12,
+ .en_bit = 0,
+ .min_mV = 700,
+ .max_mV = 3500,
+ .step_mV = 25,
+ },
+ [AXP_SUPPLY_DCDC2] = {
+ .volt_reg = 0x23,
+ .volt_reg_mask = 0x3f,
+ .en_reg = 0x10,
+ .en_bit = 0,
+ .min_mV = 700,
+ .max_mV = 2275,
+ .step_mV = 25,
+ },
+ [AXP_SUPPLY_DCDC3] = {
+ .volt_reg = 0x27,
+ .volt_reg_mask = 0x7f,
+ .en_reg = 0x12,
+ .en_bit = 1,
+ .min_mV = 700,
+ .max_mV = 3500,
+ .step_mV = 25,
+ },
+ /*
+ * NOTE: LDO1 is always on, and we can't query it or change voltages
+ */
+ [AXP_SUPPLY_LDO2] = {
+ .volt_reg = 0x28,
+ .volt_reg_mask = 0xf0,
+ .en_reg = 0x12,
+ .en_bit = 2,
+ .min_mV = 1800,
+ .max_mV = 3300,
+ .step_mV = 100,
+ },
+ [AXP_SUPPLY_LDO3] = {
+ .volt_reg = 0x28,
+ .volt_reg_mask = 0x0f,
+ .en_reg = 0x12,
+ .en_bit = 3,
+ .min_mV = 1800,
+ .max_mV = 3300,
+ .step_mV = 100,
+ },
+ [AXP_SUPPLY_LDO_IO0] = {
+ .volt_reg = 0x91,
+ .volt_reg_mask = 0xf0,
+ .en_reg = 0x90,
+ .en_bit = 0xff, /* this one requires special handling */
+ .min_mV = 1800,
+ .max_mV = 3300,
+ .step_mV = 100,
+ },
+#else
+# error "Untested AXP chip"
+#endif
+};
+
+static struct axp_driver {
+ int adc_enable;
+ int chargecurrent_setting;
+ int chip_id;
+} axp;
+
+static void axp_init_enabled_adcs(void)
+{
+ axp.adc_enable = 0;
+
+ /* Read chip ID, so we can display it on the debug screen.
+ * This is undocumented but there's Linux driver code floating around
+ * which suggests this should work for many AXP chips. */
+ axp.chip_id = i2c_reg_read1(AXP_PMU_BUS, AXP_PMU_ADDR, AXP_REG_CHIP_ID);
+
+ /* Read enabled ADCs from the hardware */
+ uint8_t regs[2];
+ int rc = i2c_reg_read(AXP_PMU_BUS, AXP_PMU_ADDR,
+ AXP_REG_ADCENABLE1, 2, &regs[0]);
+ if(rc != I2C_STATUS_OK)
+ return;
+
+ /* Parse registers to set ADC enable bits */
+ const struct axp_adc_info* info = axp_adc_info;
+ for(int i = 0; i < NUM_ADC_CHANNELS; ++i) {
+ if(info[i].en_reg == 0xff)
+ continue;
+
+ if(regs[info[i].en_reg - AXP_REG_ADCENABLE1] & info[i].en_bit)
+ axp.adc_enable |= 1 << i;
+ }
+
+ /* Handle battery power ADC */
+ if((axp.adc_enable & (1 << ADC_BATTERY_VOLTAGE)) &&
+ (axp.adc_enable & (1 << ADC_DISCHARGE_CURRENT))) {
+ axp.adc_enable |= (1 << ADC_BATTERY_POWER);
+ }
+}
+
+void axp_init(void)
+{
+ axp_init_enabled_adcs();
+
+ /* We need discharge current ADC to reliably poll for a full battery */
+ int bits = axp.adc_enable;
+ bits |= (1 << ADC_DISCHARGE_CURRENT);
+ axp_adc_set_enabled(bits);
+
+ /* Read the maximum charging current */
+ int value = i2c_reg_read1(AXP_PMU_BUS, AXP_PMU_ADDR, AXP_REG_CHARGECONTROL1);
+ axp.chargecurrent_setting = (value < 0) ? -1 : (value & 0xf);
+}
+
+void axp_supply_set_voltage(int supply, int voltage)
+{
+ const struct axp_supply_info* info = &axp_supply_info[supply];
+ if(info->volt_reg == 0 || info->volt_reg_mask == 0)
+ return;
+
+ if(voltage > 0 && info->step_mV != 0) {
+ if(voltage < info->min_mV || voltage > info->max_mV)
+ return;
+
+ int regval = (voltage - info->min_mV) / info->step_mV;
+ i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR, info->volt_reg,
+ info->volt_reg_mask, regval, NULL);
+ }
+
+ if(info->en_bit != 0xff) {
+ i2c_reg_setbit1(AXP_PMU_BUS, AXP_PMU_ADDR,
+ info->en_reg, info->en_bit,
+ voltage > 0 ? 1 : 0, NULL);
+ }
+}
+
+int axp_supply_get_voltage(int supply)
+{
+ const struct axp_supply_info* info = &axp_supply_info[supply];
+ if(info->volt_reg == 0)
+ return AXP_SUPPLY_NOT_PRESENT;
+
+ if(info->en_reg != 0) {
+ int r = i2c_reg_read1(AXP_PMU_BUS, AXP_PMU_ADDR, info->en_reg);
+ if(r < 0)
+ return AXP_SUPPLY_DISABLED;
+
+#if HAVE_AXP_PMU == 192
+ if(supply == AXP_SUPPLY_LDO_IO0) {
+ if((r & 7) != 2)
+ return AXP_SUPPLY_DISABLED;
+ } else
+#endif
+ {
+ if(r & (1 << info->en_bit) == 0)
+ return AXP_SUPPLY_DISABLED;
+ }
+ }
+
+ /* Hack, avoid undefined shift below. Can be useful too... */
+ if(info->volt_reg_mask == 0)
+ return info->min_mV;
+
+ int r = i2c_reg_read1(AXP_PMU_BUS, AXP_PMU_ADDR, info->volt_reg);
+ if(r < 0)
+ return 0;
+
+ int bit = find_first_set_bit(info->volt_reg_mask);
+ int val = (r & info->volt_reg_mask) >> bit;
+ return info->min_mV + (val * info->step_mV);
+}
+
+/* TODO: this can STILL indicate some false positives! */
+int axp_battery_status(void)
+{
+ int r = i2c_reg_read1(AXP_PMU_BUS, AXP_PMU_ADDR, AXP_REG_POWERSTATUS);
+ if(r >= 0) {
+ /* Charging bit indicates we're currently charging */
+ if((r & 0x04) != 0)
+ return AXP_BATT_CHARGING;
+
+ /* Not plugged in means we're discharging */
+ if((r & 0xf0) == 0)
+ return AXP_BATT_DISCHARGING;
+ } else {
+ /* Report discharging if we can't find out power status */
+ return AXP_BATT_DISCHARGING;
+ }
+
+ /* If the battery is full and not in use, the charging bit will be 0,
+ * there will be an external power source, AND the discharge current
+ * will be zero. Seems to rule out all false positives. */
+ int d = axp_adc_read_raw(ADC_DISCHARGE_CURRENT);
+ if(d == 0)
+ return AXP_BATT_FULL;
+
+ return AXP_BATT_DISCHARGING;
+}
+
+int axp_input_status(void)
+{
+#ifdef HAVE_BATTERY_SWITCH
+ int input_status = 0;
+#else
+ int input_status = AXP_INPUT_BATTERY;
+#endif
+
+ int r = i2c_reg_read1(AXP_PMU_BUS, AXP_PMU_ADDR, AXP_REG_POWERSTATUS);
+ if(r < 0)
+ return input_status;
+
+ /* Check for AC input */
+ if(r & 0x80)
+ input_status |= AXP_INPUT_AC;
+
+ /* Only report USB if ACIN and VBUS are not shorted */
+ if((r & 0x20) != 0 && (r & 0x02) == 0)
+ input_status |= AXP_INPUT_USB;
+
+#ifdef HAVE_BATTERY_SWITCH
+ /* Check for battery presence if target defines it as removable */
+ r = i2c_reg_read1(AXP_PMU_BUS, AXP_PMU_ADDR, AXP_REG_CHARGESTATUS);
+ if(r >= 0 && (r & 0x20) != 0)
+ input_status |= AXP_INPUT_BATTERY;
+#endif
+
+ return input_status;
+}
+
+int axp_adc_read(int adc)
+{
+ int value = axp_adc_read_raw(adc);
+ if(value == INT_MIN)
+ return INT_MIN;
+
+ return axp_adc_conv_raw(adc, value);
+}
+
+int axp_adc_read_raw(int adc)
+{
+ /* Don't give a reading if the ADC is not enabled */
+ if((axp.adc_enable & (1 << adc)) == 0)
+ return INT_MIN;
+
+ /* Read the ADC */
+ uint8_t buf[3];
+ int count = (adc == ADC_BATTERY_POWER) ? 3 : 2;
+ uint8_t reg = axp_adc_info[adc].reg;
+ int rc = i2c_reg_read(AXP_PMU_BUS, AXP_PMU_ADDR, reg, count, &buf[0]);
+ if(rc != I2C_STATUS_OK)
+ return INT_MIN;
+
+ /* Parse the value */
+ if(adc == ADC_BATTERY_POWER)
+ return (buf[0] << 16) | (buf[1] << 8) | buf[2];
+ else if(adc == ADC_CHARGE_CURRENT || adc == ADC_DISCHARGE_CURRENT)
+ return (buf[0] << 5) | (buf[1] & 0x1f);
+ else
+ return (buf[0] << 4) | (buf[1] & 0xf);
+}
+
+int axp_adc_conv_raw(int adc, int value)
+{
+ switch(adc) {
+ case ADC_ACIN_VOLTAGE:
+ case ADC_VBUS_VOLTAGE:
+ /* 0 mV ... 6.9615 mV, step 1.7 mV */
+ return value * 17 / 10;
+ case ADC_ACIN_CURRENT:
+ /* 0 mA ... 2.5594 A, step 0.625 mA */
+ return value * 5 / 8;
+ case ADC_VBUS_CURRENT:
+ /* 0 mA ... 1.5356 A, step 0.375 mA */
+ return value * 3 / 8;
+ case ADC_INTERNAL_TEMP:
+ /* -144.7 C ... 264.8 C, step 0.1 C */
+ return value - 1447;
+ case ADC_TS_INPUT:
+ /* 0 mV ... 3.276 V, step 0.8 mV */
+ return value * 4 / 5;
+ case ADC_BATTERY_VOLTAGE:
+ /* 0 mV ... 4.5045 V, step 1.1 mV */
+ return value * 11 / 10;
+ case ADC_CHARGE_CURRENT:
+ case ADC_DISCHARGE_CURRENT:
+ /* 0 mA to 4.095 A, step 0.5 mA */
+ return value / 2;
+ case ADC_APS_VOLTAGE:
+ /* 0 mV to 5.733 V, step 1.4 mV */
+ return value * 7 / 5;
+ case ADC_BATTERY_POWER:
+ /* 0 uW to 23.6404 W, step 0.55 uW */
+ return value * 11 / 20;
+ default:
+ /* Shouldn't happen */
+ return INT_MIN;
+ }
+}
+
+int axp_adc_get_enabled(void)
+{
+ return axp.adc_enable;
+}
+
+void axp_adc_set_enabled(int adc_bits)
+{
+ /* Ignore no-op */
+ if(adc_bits == axp.adc_enable)
+ return;
+
+ /* Compute the new register values */
+ const struct axp_adc_info* info = axp_adc_info;
+ uint8_t regs[2] = {0, 0};
+ for(int i = 0; i < NUM_ADC_CHANNELS; ++i) {
+ if(info[i].en_reg == 0xff)
+ continue;
+
+ if(adc_bits & (1 << i))
+ regs[info[i].en_reg - 0x82] |= 1 << info[i].en_bit;
+ }
+
+ /* These ADCs share an enable bit */
+ if(adc_bits & ((1 << ADC_CHARGE_CURRENT)|(1 << ADC_DISCHARGE_CURRENT))) {
+ adc_bits |= (1 << ADC_CHARGE_CURRENT);
+ adc_bits |= (1 << ADC_DISCHARGE_CURRENT);
+ }
+
+ /* Enable required bits for battery power ADC */
+ if(adc_bits & (1 << ADC_BATTERY_POWER)) {
+ regs[0] |= 1 << info[ADC_DISCHARGE_CURRENT].en_bit;
+ regs[0] |= 1 << info[ADC_BATTERY_VOLTAGE].en_bit;
+ }
+
+ /* Update the configuration */
+ i2c_reg_write(AXP_PMU_BUS, AXP_PMU_ADDR, AXP_REG_ADCENABLE1, 2, &regs[0]);
+ axp.adc_enable = adc_bits;
+}
+
+int axp_adc_get_rate(void)
+{
+ int r = i2c_reg_read1(AXP_PMU_BUS, AXP_PMU_ADDR, AXP_REG_ADCSAMPLERATE);
+ if(r < 0)
+ return AXP_ADC_RATE_100HZ; /* an arbitrary value */
+
+ return (r >> 6) & 3;
+}
+
+void axp_adc_set_rate(int rate)
+{
+ i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR, AXP_REG_ADCSAMPLERATE,
+ 0xc0, (rate & 3) << 6, NULL);
+}
+
+static uint32_t axp_cc_parse(const uint8_t* buf)
+{
+ return ((uint32_t)buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
+}
+
+void axp_cc_read(uint32_t* charge, uint32_t* discharge)
+{
+ uint8_t buf[8];
+ int rc = i2c_reg_read(AXP_PMU_BUS, AXP_PMU_ADDR,
+ AXP_REG_COULOMBCOUNTERBASE, 8, &buf[0]);
+ if(rc != I2C_STATUS_OK) {
+ if(charge)
+ *charge = 0;
+ if(discharge)
+ *discharge = 0;
+ return;
+ }
+
+ if(charge)
+ *charge = axp_cc_parse(&buf[0]);
+ if(discharge)
+ *discharge = axp_cc_parse(&buf[4]);
+}
+
+void axp_cc_clear(void)
+{
+ i2c_reg_setbit1(AXP_PMU_BUS, AXP_PMU_ADDR,
+ AXP_REG_COULOMBCOUNTERCTRL, 5, 1, NULL);
+}
+
+void axp_cc_enable(bool en)
+{
+ i2c_reg_setbit1(AXP_PMU_BUS, AXP_PMU_ADDR,
+ AXP_REG_COULOMBCOUNTERCTRL, 7, en ? 1 : 0, NULL);
+}
+
+bool axp_cc_is_enabled(void)
+{
+ int reg = i2c_reg_read1(AXP_PMU_BUS, AXP_PMU_ADDR,
+ AXP_REG_COULOMBCOUNTERCTRL);
+ return reg >= 0 && (reg & 0x40) != 0;
+}
+
+static const int chargecurrent_tbl[] = {
+ 100, 190, 280, 360,
+ 450, 550, 630, 700,
+ 780, 880, 960, 1000,
+ 1080, 1160, 1240, 1320,
+};
+
+static const int chargecurrent_tblsz = sizeof(chargecurrent_tbl)/sizeof(int);
+
+void axp_set_charge_current(int maxcurrent)
+{
+ /* Find the charge current just higher than maxcurrent */
+ int value = 0;
+ while(value < chargecurrent_tblsz &&
+ chargecurrent_tbl[value] <= maxcurrent)
+ ++value;
+
+ /* Select the next lower current, the greatest current <= maxcurrent */
+ if(value >= chargecurrent_tblsz)
+ value = chargecurrent_tblsz - 1;
+ else if(value > 0)
+ --value;
+
+ /* Don't issue i2c write if desired setting is already in use */
+ if(value == axp.chargecurrent_setting)
+ return;
+
+ /* Update register */
+ i2c_reg_modify1(AXP_PMU_BUS, AXP_PMU_ADDR,
+ AXP_REG_CHARGECONTROL1, 0x0f, value, NULL);
+ axp.chargecurrent_setting = value;
+}
+
+int axp_get_charge_current(void)
+{
+ if(axp.chargecurrent_setting < 0)
+ return chargecurrent_tbl[0];
+ else
+ return chargecurrent_tbl[axp.chargecurrent_setting];
+}
+
+void axp_power_off(void)
+{
+ /* Set the shutdown bit */
+ i2c_reg_setbit1(AXP_PMU_BUS, AXP_PMU_ADDR,
+ AXP_REG_SHUTDOWNLEDCTRL, 7, 1, NULL);
+}
+
+#ifndef BOOTLOADER
+enum {
+ AXP_DEBUG_CHIP_ID,
+ AXP_DEBUG_BATTERY_STATUS,
+ AXP_DEBUG_INPUT_STATUS,
+ AXP_DEBUG_CHARGE_CURRENT,
+ AXP_DEBUG_COULOMB_COUNTERS,
+ AXP_DEBUG_ADC_RATE,
+ AXP_DEBUG_FIRST_ADC,
+ AXP_DEBUG_FIRST_SUPPLY = AXP_DEBUG_FIRST_ADC + NUM_ADC_CHANNELS,
+ AXP_DEBUG_NUM_ENTRIES = AXP_DEBUG_FIRST_SUPPLY + AXP_NUM_SUPPLIES,
+};
+
+static int axp_debug_menu_cb(int action, struct gui_synclist* lists)
+{
+ (void)lists;
+
+ if(action == ACTION_NONE)
+ action = ACTION_REDRAW;
+
+ return action;
+}
+
+static const char* axp_debug_menu_get_name(int item, void* data,
+ char* buf, size_t buflen)
+{
+ (void)data;
+
+ static const char* const adc_names[] = {
+ "V_acin", "I_acin", "V_vbus", "I_vbus", "T_int",
+ "V_ts", "V_batt", "I_chrg", "I_dchg", "V_aps", "P_batt"
+ };
+
+ static const char* const adc_units[] = {
+ "mV", "mA", "mV", "mA", "C", "mV", "mV", "mA", "mA", "mV", "uW",
+ };
+
+ static const char* const supply_names[] = {
+ "DCDC1", "DCDC2", "DCDC3",
+ "LDO1", "LDO2", "LDO3", "LDO_IO0",
+ };
+
+ int adc = item - AXP_DEBUG_FIRST_ADC;
+ if(item >= AXP_DEBUG_FIRST_ADC && adc < NUM_ADC_CHANNELS) {
+ int raw_value = axp_adc_read_raw(adc);
+ if(raw_value == INT_MIN) {
+ snprintf(buf, buflen, "%s: [Disabled]", adc_names[adc]);
+ return buf;
+ }
+
+ int value = axp_adc_conv_raw(adc, raw_value);
+ if(adc == ADC_INTERNAL_TEMP) {
+ snprintf(buf, buflen, "%s: %d.%d %s", adc_names[adc],
+ value/10, value%10, adc_units[adc]);
+ } else {
+ snprintf(buf, buflen, "%s: %d %s", adc_names[adc],
+ value, adc_units[adc]);
+ }
+
+ return buf;
+ }
+
+ int supply = item - AXP_DEBUG_FIRST_SUPPLY;
+ if(item >= AXP_DEBUG_FIRST_SUPPLY && supply < AXP_NUM_SUPPLIES) {
+ int voltage = axp_supply_get_voltage(supply);
+ if(voltage == AXP_SUPPLY_NOT_PRESENT)
+ snprintf(buf, buflen, "%s: [Not Present]", supply_names[supply]);
+ else if(voltage == AXP_SUPPLY_DISABLED)
+ snprintf(buf, buflen, "%s: [Disabled]", supply_names[supply]);
+ else
+ snprintf(buf, buflen, "%s: %d mV", supply_names[supply], voltage);
+
+ return buf;
+ }
+
+ switch(item) {
+ case AXP_DEBUG_CHIP_ID: {
+ snprintf(buf, buflen, "Chip ID: %d (%02x) [Driver: AXP%d]",
+ axp.chip_id, axp.chip_id, HAVE_AXP_PMU);
+ return buf;
+ } break;
+
+ case AXP_DEBUG_BATTERY_STATUS: {
+ switch(axp_battery_status()) {
+ case AXP_BATT_FULL:
+ return "Battery: Full";
+ case AXP_BATT_CHARGING:
+ return "Battery: Charging";
+ case AXP_BATT_DISCHARGING:
+ return "Battery: Discharging";
+ default:
+ return "Battery: Unknown";
+ }
+ } break;
+
+ case AXP_DEBUG_INPUT_STATUS: {
+ int s = axp_input_status();
+ const char* ac = (s & AXP_INPUT_AC) ? " AC" : "";
+ const char* usb = (s & AXP_INPUT_USB) ? " USB" : "";
+ const char* batt = (s & AXP_INPUT_BATTERY) ? " Battery" : "";
+ snprintf(buf, buflen, "Inputs:%s%s%s", ac, usb, batt);
+ return buf;
+ } break;
+
+ case AXP_DEBUG_CHARGE_CURRENT: {
+ int current = axp_get_charge_current();
+ snprintf(buf, buflen, "Max charge current: %d mA", current);
+ return buf;
+ } break;
+
+ case AXP_DEBUG_COULOMB_COUNTERS: {
+ uint32_t charge, discharge;
+ axp_cc_read(&charge, &discharge);
+
+ snprintf(buf, buflen, "Coulomb counters: +%lu / -%lu",
+ (unsigned long)charge, (unsigned long)discharge);
+ return buf;
+ } break;
+
+ case AXP_DEBUG_ADC_RATE: {
+ int rate = 25 << axp_adc_get_rate();
+ snprintf(buf, buflen, "ADC sample rate: %d Hz", rate);
+ return buf;
+ } break;
+
+ default:
+ return "---";
+ }
+}
+
+bool axp_debug_menu(void)
+{
+ struct simplelist_info info;
+ simplelist_info_init(&info, "AXP debug", AXP_DEBUG_NUM_ENTRIES, NULL);
+ info.action_callback = axp_debug_menu_cb;
+ info.get_name = axp_debug_menu_get_name;
+ return simplelist_show_list(&info);
+}
+#endif /* !BOOTLOADER */
+
+/* This is basically the only valid implementation, so define it here */
+unsigned int power_input_status(void)
+{
+ unsigned int state = 0;
+ int input_status = axp_input_status();
+
+ if(input_status & AXP_INPUT_AC)
+ state |= POWER_INPUT_MAIN_CHARGER;
+
+ if(input_status & AXP_INPUT_USB)
+ state |= POWER_INPUT_USB_CHARGER;
+
+#ifdef HAVE_BATTERY_SWITCH
+ if(input_status & AXP_INPUT_BATTERY)
+ state |= POWER_INPUT_BATTERY;
+#endif
+
+ return state;
+}