OpenCellular/common/battery.c

/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 *
 * Common battery command.
 */

#include "battery.h"
#include "common.h"
#include "console.h"
#include "gpio.h"
#include "timer.h"
#include "util.h"
#include "watchdog.h"

#ifdef CONFIG_BATTERY_PRESENT_GPIO
#ifdef CONFIG_BATTERY_PRESENT_CUSTOM
#error "Don't define both CONFIG_BATTERY_PRESENT_CUSTOM and" \
	"CONFIG_BATTERY_PRESENT_GPIO"
#endif
/**
 * Physical detection of battery.
 */
enum battery_present battery_is_present(void)
{
	/* The GPIO is low when the battery is present */
	return gpio_get_level(CONFIG_BATTERY_PRESENT_GPIO) ? BP_NO : BP_YES;
}
#endif

static const char *get_error_text(int rv)
{
	if (rv == EC_ERROR_UNIMPLEMENTED)
		return "(unsupported)";
	else
		return "(error)";
}

static void print_item_name(const char *name)
{
	ccprintf("  %-11s", name);
}

static int check_print_error(int rv)
{
	if (rv != EC_SUCCESS)
		ccprintf("%s\n", get_error_text(rv));
	return rv == EC_SUCCESS;
}

static void print_battery_status(void)
{
	static const char * const st[] = {"EMPTY", "FULL", "DCHG", "INIT",};
	static const char * const al[] = {"RT", "RC", "--", "TD",
					  "OT", "--", "TC", "OC"};

	int value, i;

	print_item_name("Status:");
	if (check_print_error(battery_status(&value))) {
		ccprintf("0x%04x", value);

		/* bits 0-3 are only valid when the previous transaction
		 * failed, so ignore them */

		/* bits 4-7 are status */
		for (i = 0; i < 4; i++)
			if (value & (1 << (i+4)))
				ccprintf(" %s", st[i]);

		/* bits 15-8 are alarms */
		for (i = 0; i < 8; i++)
			if (value & (1 << (i+8)))
				ccprintf(" %s", al[i]);

		ccprintf("\n");
	}
}

static void print_battery_strings(void)
{
	char text[32];

	print_item_name("Manuf:");
	if (check_print_error(battery_manufacturer_name(text, sizeof(text))))
		ccprintf("%s\n", text);

	print_item_name("Device:");
	if (check_print_error(battery_device_name(text, sizeof(text))))
		ccprintf("%s\n", text);

	print_item_name("Chem:");
	if (check_print_error(battery_device_chemistry(text, sizeof(text))))
		ccprintf("%s\n", text);
}

static void print_battery_params(void)
{
	struct batt_params batt;

	battery_get_params(&batt);
	print_item_name("Param flags:");
	ccprintf("%08x\n", batt.flags);

	print_item_name("Temp:");
	ccprintf("0x%04x = %.1d K (%.1d C)\n",
		 batt.temperature, batt.temperature, batt.temperature - 2731);

	print_item_name("V:");
	ccprintf("0x%04x = %d mV\n", batt.voltage, batt.voltage);

	print_item_name("V-desired:");
	ccprintf("0x%04x = %d mV\n", batt.desired_voltage,
		 batt.desired_voltage);

	print_item_name("I:");
	ccprintf("0x%04x = %d mA", batt.current & 0xffff, batt.current);
	if (batt.current > 0)
		ccputs("(CHG)");
	else if (batt.current < 0)
		ccputs("(DISCHG)");
	ccputs("\n");

	print_item_name("I-desired:");
	ccprintf("0x%04x = %d mA\n", batt.desired_current,
		 batt.desired_current);

	print_item_name("Charging:");
	ccprintf("%sAllowed\n",
		 batt.flags & BATT_FLAG_WANT_CHARGE ? "" : "Not ");

	print_item_name("Charge:");
		ccprintf("%d %%\n", batt.state_of_charge);
}

static void print_battery_info(void)
{
	int value;
	int hour, minute;

	print_item_name("Serial:");
	if (check_print_error(battery_serial_number(&value)))
		ccprintf("0x%04x\n", value);

	print_item_name("V-design:");
	if (check_print_error(battery_design_voltage(&value)))
		ccprintf("0x%04x = %d mV\n", value, value);

	print_item_name("Mode:");
	if (check_print_error(battery_get_mode(&value)))
		ccprintf("0x%04x\n", value);

	print_item_name("Abs charge:");
	if (check_print_error(battery_state_of_charge_abs(&value)))
		ccprintf("%d %%\n", value);

	print_item_name("Remaining:");
	if (check_print_error(battery_remaining_capacity(&value)))
		ccprintf("%d mAh\n", value);

	print_item_name("Cap-full:");
	if (check_print_error(battery_full_charge_capacity(&value)))
		ccprintf("%d mAh\n", value);

	print_item_name("  Design:");
	if (check_print_error(battery_design_capacity(&value)))
		ccprintf("%d mAh\n", value);

	print_item_name("Time-full:");
	if (check_print_error(battery_time_to_full(&value))) {
		if (value == 65535) {
			hour   = 0;
			minute = 0;
		} else {
			hour   = value / 60;
			minute = value % 60;
		}
		ccprintf("%dh:%d\n", hour, minute);
	}

	print_item_name("  Empty:");
	if (check_print_error(battery_time_to_empty(&value))) {
		if (value == 65535) {
			hour   = 0;
			minute = 0;
		} else {
			hour   = value / 60;
			minute = value % 60;
		}
		ccprintf("%dh:%d\n", hour, minute);
	}
}

static int command_battery(int argc, char **argv)
{
	int repeat = 1;
	int loop;
	int sleep_ms = 0;
	char *e;

	if (argc > 1) {
		repeat = strtoi(argv[1], &e, 0);
		if (*e) {
			ccputs("Invalid repeat count\n");
			return EC_ERROR_INVAL;
		}
	}

	if (argc > 2) {
		sleep_ms = strtoi(argv[2], &e, 0);
		if (*e) {
			ccputs("Invalid sleep ms\n");
			return EC_ERROR_INVAL;
		}
	}

	for (loop = 0; loop < repeat; loop++) {
		print_battery_status();
		print_battery_params();
		print_battery_strings();
		print_battery_info();

		/*
		 * Running with a high repeat count will take so long the
		 * watchdog timer fires.  So reset the watchdog timer each
		 * iteration.
		 */
		watchdog_reload();

		if (sleep_ms)
			msleep(sleep_ms);
	}

	return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(battery, command_battery,
			"<repeat_count> <sleep_ms>",
			"Print battery info",
			NULL);