Add PMU powerinfo host command and console command

Before this change, powerinfo host command supports only one target
with USB charging. This change adds a common powerinfo host command
and console command for TPSChrome based targets.

BRANCH=None
BUG=chrome-os-partner:20326
TEST=manual
  build and flash pit target, check console command 'powerinfo'.
  check ectool powerinfo with and without AC adapter.

Change-Id: I2cfd8dfa011e23f819c6bae19cf22b4a7343f044
Signed-off-by: Rong Chang <rongchang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/63350
Reviewed-by: Vic Yang <victoryang@chromium.org>

board/pit/board.h

@@ -24,6 +24,7 @@
 #define CONFIG_I2C
 #define CONFIG_KEYBOARD_PROTOCOL_MKBP
 #define CONFIG_PMU_HARD_RESET
+#define CONFIG_PMU_POWERINFO
 #define CONFIG_PMU_TPS65090
 #define CONFIG_SPI
 
@@ -52,6 +53,10 @@
 #define I2C_PORT_SLAVE 1
 #define I2C_PORTS_USED 1
 
+/* Charger sense resistors */
+#define CONFIG_CHARGER_SENSE_RESISTOR_AC 12
+#define CONFIG_CHARGER_SENSE_RESISTOR 16
+
 /* Timer selection */
 #define TIM_CLOCK_MSB 3
 #define TIM_CLOCK_LSB 9

common/build.mk

@@ -33,6 +33,7 @@ common-$(CONFIG_CHIPSET_GAIA)+=chipset_gaia.o
 common-$(CONFIG_CHIPSET_HASWELL)+=chipset_haswell.o
 common-$(CONFIG_CHIPSET_IVYBRIDGE)+=chipset_ivybridge.o
 common-$(CONFIG_CHIPSET_X86)+=chipset_x86_common.o
+common-$(CONFIG_PMU_POWERINFO)+=pmu_tps65090_powerinfo.o
 common-$(CONFIG_PMU_TPS65090)+=pmu_tps65090.o
 common-$(CONFIG_EOPTION)+=eoption.o
 common-$(CONFIG_EXTPOWER_FALCO)+=extpower_falco.o

common/pmu_tps65090_powerinfo.c

@@ -0,0 +1,150 @@
+/* Copyright (c) 2013 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.
+ *
+ * TPSChrome powerinfo commands.
+ */
+
+#include "console.h"
+#include "extpower.h"
+#include "host_command.h"
+#include "pmu_tpschrome.h"
+#include "smart_battery.h"
+#include "util.h"
+
+/* FIXME: move all the constants to pmu_tpschrome, make
+ * dcdc3, fet output name configurable.
+ */
+static const struct {
+	const char *name;
+	int voltage_mv;
+	int current_range_ma;
+} pmu_fet[] = {
+	{"backlight", 11400, 1100},
+	{"video"    ,  5000,  220},
+	{"wwan"     ,  3300, 3300},
+	{"sdcard"   ,  3300, 1100},
+	{"camera"   ,  3300, 1100},
+	{"lcd"      ,  3300, 1100},
+	{"video_add",  5000, 1100},
+}, pmu_dcdc[] = {
+	{"p5000", 5050, 5000},
+	{"p3300", 3333, 5000},
+	{"p1350", 1350, 5000},
+};
+
+static const int pmu_voltage_range_mv = 17000;
+static const int pmu_ac_sense_range_mv = 33;
+static const int pmu_bat_sense_range_mv = 40;
+static const int pmu_adc_resolution = 1024;
+static const int pmu_sense_resistor_bat = CONFIG_CHARGER_SENSE_RESISTOR;
+static const int pmu_sense_resistor_ac = CONFIG_CHARGER_SENSE_RESISTOR_AC;
+
+static inline int calc_voltage(int adc_value, int range_mv)
+{
+	return adc_value * range_mv / pmu_adc_resolution;
+}
+
+static inline int calc_current(int adc_value, int range_ma)
+{
+	return adc_value * range_ma / pmu_adc_resolution;
+}
+
+static inline int calc_current_sr(int adc_value, int sense_resistor_mohm,
+				  int range_mv)
+{
+	return adc_value * range_mv * 1000 / sense_resistor_mohm /
+		pmu_adc_resolution;
+}
+
+static int command_powerinfo(int argc, char **argv)
+{
+	int voltage, current;
+	int index;
+
+	ccputs("[pmu powerinfo]\n");
+	/* DC to DC converter */
+	for (index = 0; index < ARRAY_SIZE(pmu_dcdc); index++) {
+		current = calc_current(
+			pmu_adc_read(ADC_IDCDC1 + index, ADC_FLAG_KEEP_ON),
+			pmu_dcdc[index].current_range_ma);
+		voltage = pmu_dcdc[index].voltage_mv;
+		ccprintf("DCDC%d:%6d mV,%4d mA,%4d mW %s\n",
+			 index + 1, voltage, current, voltage * current / 1000,
+			 pmu_dcdc[index].name);
+	}
+
+	/* FET */
+	for (index = 0; index < ARRAY_SIZE(pmu_fet); index++) {
+		current = calc_current(
+			pmu_adc_read(ADC_IFET1 + index, ADC_FLAG_KEEP_ON),
+			pmu_fet[index].current_range_ma);
+		voltage = pmu_fet[index].voltage_mv;
+		ccprintf("FET%d :%6d mV,%4d mA,%4d mW %s\n",
+			 index + 1, voltage, current, voltage * current / 1000,
+			 pmu_fet[index].name);
+	}
+
+	/* Battery charging */
+	voltage = calc_voltage(
+		pmu_adc_read(ADC_VBAT, ADC_FLAG_KEEP_ON),
+		pmu_voltage_range_mv);
+	current = calc_current_sr(
+		pmu_adc_read(ADC_IBAT, ADC_FLAG_KEEP_ON),
+		pmu_sense_resistor_bat, pmu_bat_sense_range_mv);
+	ccprintf("Chg  :%6d mV,%4d mA,%4d mW\n", voltage, current,
+		 voltage * current / 1000);
+
+	/* AC input */
+	voltage = calc_voltage(
+		pmu_adc_read(ADC_VAC, ADC_FLAG_KEEP_ON),
+		pmu_voltage_range_mv);
+	current = calc_current_sr(
+		pmu_adc_read(ADC_IAC, 0),
+		pmu_sense_resistor_ac, pmu_ac_sense_range_mv);
+	ccprintf("AC   :%6d mV,%4d mA,%4d mW\n", voltage, current,
+		 voltage * current / 1000);
+
+
+	return EC_SUCCESS;
+}
+DECLARE_CONSOLE_COMMAND(powerinfo, command_powerinfo,
+		NULL,
+		"Show PMU power info",
+		NULL);
+
+static int power_command_info(struct host_cmd_handler_args *args)
+{
+	int bat_charging_current;
+	struct ec_response_power_info *r = args->response;
+
+	r->voltage_ac = calc_voltage(
+		pmu_adc_read(ADC_VAC, ADC_FLAG_KEEP_ON),
+		pmu_voltage_range_mv);
+	if (extpower_is_present()) {
+		/* Power source = AC */
+		r->voltage_system = r->voltage_ac;
+		r->current_system = calc_current_sr(
+			pmu_adc_read(ADC_IAC, ADC_FLAG_KEEP_ON),
+			pmu_sense_resistor_ac, pmu_ac_sense_range_mv);
+	} else {
+		/* Power source == battery */
+		r->voltage_system = calc_voltage(
+			pmu_adc_read(ADC_VBAT, ADC_FLAG_KEEP_ON),
+			pmu_voltage_range_mv);
+		/* PMU reads charging current. When battery is discharging,
+		 * ADC returns 0. Use battery gas guage output instead.
+		 */
+		battery_current(&bat_charging_current);
+		r->current_system = -bat_charging_current;
+	}
+
+	/* Ignore USB powerinfo fields. */
+	r->usb_dev_type = 0;
+	r->usb_current_limit = 0;
+
+	args->response_size = sizeof(*r);
+
+	return EC_RES_SUCCESS;
+}
+DECLARE_HOST_COMMAND(EC_CMD_POWER_INFO, power_command_info, EC_VER_MASK(0));

include/config.h

@@ -422,6 +422,9 @@
 /* Compile support for TPS65090 PMU */
 #undef CONFIG_PMU_TPS65090
 
+/* Compile support for PMU powerinfo host command */
+#undef CONFIG_PMU_POWERINFO
+
 /*****************************************************************************/
 
 /* Compile common code to support power button debouncing */