Ampton: create initial EC image

This image is based on bip from current ToT and the most recent ampton
schematics.  Bugs have been created and put into TODO statements for
the future work needed on this EC image.

BRANCH=None
BUG=b:111498206
TEST=builds

Change-Id: Idff972b9ce5231524dd4865a87953ebcd5310c62
Signed-off-by: Diana Z <dzigterman@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1225350
Reviewed-by: Justin TerAvest <teravest@chromium.org>

1 files changed, 122 insertions, 0 deletions

diff --git a/board/ampton/board.c b/board/ampton/board.c
new file mode 100644
index 0000000000..0552be05a6
--- /dev/null
+++ b/board/ampton/board.c
@@ -0,0 +1,122 @@
+/* Copyright 2018 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.
+ */
+
+/* Ampton/Apel board-specific configuration */
+
+#include "adc.h"
+#include "adc_chip.h"
+#include "button.h"
+#include "charge_state.h"
+#include "common.h"
+#include "driver/bc12/bq24392.h"
+#include "driver/ppc/sn5s330.h"
+#include "driver/tcpm/it83xx_pd.h"
+#include "driver/tcpm/ps8xxx.h"
+#include "driver/usb_mux_it5205.h"
+#include "extpower.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "i2c.h"
+#include "intc.h"
+#include "keyboard_scan.h"
+#include "lid_switch.h"
+#include "power.h"
+#include "power_button.h"
+#include "spi.h"
+#include "switch.h"
+#include "system.h"
+#include "tcpci.h"
+#include "tablet_mode.h"
+#include "temp_sensor.h"
+#include "thermistor.h"
+#include "uart.h"
+#include "usb_mux.h"
+#include "usbc_ppc.h"
+#include "util.h"
+
+static void ppc_interrupt(enum gpio_signal signal)
+{
+	if (signal == GPIO_USB_C0_PD_INT_ODL)
+		sn5s330_interrupt(0);
+	else if (signal == GPIO_USB_C1_PD_INT_ODL)
+		sn5s330_interrupt(1);
+}
+
+#include "gpio_list.h" /* Must come after other header files. */
+
+/******************************************************************************/
+/* ADC channels */
+const struct adc_t adc_channels[] = {
+	/* Vbus C0 sensing (10x voltage divider). PPVAR_USB_C0_VBUS */
+	[ADC_VBUS_C0] = {.name = "VBUS_C0",
+			 .factor_mul = 10 * ADC_MAX_MVOLT,
+			 .factor_div = ADC_READ_MAX + 1,
+			 .shift = 0,
+			 .channel = CHIP_ADC_CH13},
+	/* Vbus C1 sensing (10x voltage divider). SUB_EC_ADC */
+	[ADC_VBUS_C1] = {.name = "VBUS_C1",
+			 .factor_mul = 10 * ADC_MAX_MVOLT,
+			 .factor_div = ADC_READ_MAX + 1,
+			 .shift = 0,
+			 .channel = CHIP_ADC_CH14},
+	/* Convert to raw mV for thermistor table lookup */
+	[ADC_TEMP_SENSOR_AMB] = {.name = "TEMP_AMB",
+			 .factor_mul = ADC_MAX_MVOLT,
+			 .factor_div = ADC_READ_MAX + 1,
+			 .shift = 0,
+			 .channel = CHIP_ADC_CH3},
+	/* Convert to raw mV for thermistor table lookup */
+	[ADC_TEMP_SENSOR_CHARGER] = {.name = "TEMP_CHARGER",
+			 .factor_mul = ADC_MAX_MVOLT,
+			 .factor_div = ADC_READ_MAX + 1,
+			 .shift = 0,
+			 .channel = CHIP_ADC_CH5},
+};
+BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT);
+
+static int read_charger_temp(int idx, int *temp_ptr)
+{
+	if (!gpio_get_level(GPIO_AC_PRESENT))
+		return EC_ERROR_NOT_POWERED;
+	return get_temp_3v3_13k7_47k_4050b(idx, temp_ptr);
+}
+
+const struct temp_sensor_t temp_sensors[] = {
+	[TEMP_SENSOR_BATTERY] = {.name = "Battery",
+				 .type = TEMP_SENSOR_TYPE_BATTERY,
+				 .read = charge_get_battery_temp,
+				 .action_delay_sec = 1},
+	[TEMP_SENSOR_AMBIENT] = {.name = "Ambient",
+				 .type = TEMP_SENSOR_TYPE_BOARD,
+				 .read = get_temp_3v3_51k1_47k_4050b,
+				 .idx = ADC_TEMP_SENSOR_AMB,
+				 .action_delay_sec = 5},
+	[TEMP_SENSOR_CHARGER] = {.name = "Charger",
+				 .type = TEMP_SENSOR_TYPE_BOARD,
+				 .read = read_charger_temp,
+				 .idx = ADC_TEMP_SENSOR_CHARGER,
+				 .action_delay_sec = 1},
+};
+BUILD_ASSERT(ARRAY_SIZE(temp_sensors) == TEMP_SENSOR_COUNT);
+
+void board_hibernate_late(void)
+{
+	/*
+	 * Set KSO/KSI pins to GPIO input function to disable keyboard scan
+	 * while hibernating. This also prevent leakage current caused
+	 * by internal pullup of keyboard scan module.
+	 */
+	gpio_set_flags_by_mask(GPIO_KSO_H, 0xff, GPIO_INPUT);
+	gpio_set_flags_by_mask(GPIO_KSO_L, 0xff, GPIO_INPUT);
+	gpio_set_flags_by_mask(GPIO_KSI, 0xff, GPIO_INPUT);
+}
+
+/* TODO(b/115501243): Ampton/Apel: implement motion sensors in EC code */
+
+void board_overcurrent_event(int port)
+{
+	/* TODO(b/78344554): pass this signal upstream once hardware reworked */
+	cprints(CC_USBPD, "p%d: overcurrent!", port);
+}