Add host command to check privacy switch status (#513)

Author: JohnAZoidberg

baseboard/fwk/baseboard_host_commands.c

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2022 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.
+ */
+
+#include "console.h"
+#include "chipset.h"
+#include "gpio.h"
+#include "ec_commands.h"
+#include "host_command.h"
+#include "host_command_customization.h"
+#include "baseboard_host_commands.h"
+#include "hooks.h"
+#include "keyboard_customization.h"
+#include "lid_switch.h"
+#include "lpc.h"
+#include "power_button.h"
+#include "switch.h"
+#include "system.h"
+#include "task.h"
+#include "timer.h"
+#include "util.h"
+#include "cypress5525.h"
+#include "board.h"
+#include "ps2mouse.h"
+#include "keyboard_8042_sharedlib.h"
+#include "diagnostics.h"
+#include "driver/als_cm32183.h"
+#include "cpu_power.h"
+#include "flash_storage.h"
+#define CPRINTS(format, args...) cprints(CC_SWITCH, format, ## args)
+
+
+/*****************************************************************************/
+/* Hooks */
+
+static enum ec_status privacy_switches_check(struct host_cmd_handler_args *args)
+{
+	struct ec_response_privacy_switches_check *r = args->response;
+
+	/*
+	 * Camera is low when off, microphone is high when off
+	 * Return 0 when off/close and 1 when high/open
+	 */
+	r->microphone = !gpio_get_level(GPIO_MIC_SW);
+	r->camera = gpio_get_level(GPIO_CAM_SW);
+
+	CPRINTS("Microphone switch open: %d", r->microphone);
+	CPRINTS("Camera switch open: %d", r->camera);
+
+	args->response_size = sizeof(*r);
+
+	return EC_RES_SUCCESS;
+
+}
+DECLARE_HOST_COMMAND(EC_CMD_PRIVACY_SWITCHES_CHECK_MODE, privacy_switches_check, EC_VER_MASK(0));

baseboard/fwk/baseboard_host_commands.h

@@ -0,0 +1,18 @@
+/* Copyright 2022 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.
+ */
+
+/* host command customization configuration */
+
+#ifndef __BASEBOARD_HOST_COMMANDS_H
+#define __BASEBOARD_HOST_COMMANDS_H
+
+#define EC_CMD_PRIVACY_SWITCHES_CHECK_MODE 0x3E14
+
+struct ec_response_privacy_switches_check {
+	uint8_t microphone;
+	uint8_t camera;
+} __ec_align1;
+
+#endif /* __BASEBOARD_HOST_COMMANDS_H */

baseboard/fwk/build.mk

@@ -11,3 +11,4 @@ baseboard-$(CONFIG_BATTERY_SMART)+=battery.o
 baseboard-$(CONFIG_FANS)+=fan.o
 baseboard-$(CONFIG_SYSTEMSERIAL_DEBUG) += system_serial.o
 baseboard-$(CONFIG_8042_AUX) += ps2mouse.o
+baseboard-$(HAS_TASK_HOSTCMD) += baseboard_host_commands.o

board/hx30/board.c

@@ -312,6 +312,8 @@ const enum gpio_signal hibernate_wake_pins[] = {
 	GPIO_POWER_BUTTON_L,
 	GPIO_AC_PRESENT,
 	GPIO_ON_OFF_BTN_L,
+	GPIO_CAM_SW,
+	GPIO_MIC_SW,
 };
 const int hibernate_wake_pins_used = ARRAY_SIZE(hibernate_wake_pins);
 

board/hx30/gpio.inc

@@ -38,6 +38,10 @@ GPIO_INT(CHASSIS_OPEN,    PIN(0161), GPIO_INT_BOTH, chassis_control_interrupt)	/
 GPIO_INT(ADP_IN,          PIN(0172), GPIO_INT_BOTH, extpower_interrupt)		/* Adaptor in from charger ACOK pin */
 GPIO_INT(PLT_RST_L,       PIN(024),  GPIO_INT_BOTH, soc_plt_reset_interrupt)	/* CPU triggered Platform reset */
 
+/* Privacy switches */
+GPIO(CAM_SW,              PIN(067),  GPIO_INT_BOTH) /* Monitor open/close of camera privacy switch */
+GPIO(MIC_SW,              PIN(0175), GPIO_INT_BOTH) /* Monitor open/close of microphone privacy switch */
+
 /* UART input */
 GPIO_INT(UART0_RX,        PIN(0105), GPIO_INT_BOTH_DSLEEP | GPIO_PULL_UP, \
 	 uart_deepsleep_interrupt)
@@ -104,8 +108,6 @@ GPIO(MUX_SBU_UART_FLIP,		PIN(0255), GPIO_OUT_LOW) /* SBU debug mux enable */
 GPIO(EC_PROCHOT_L,	PIN(0222), GPIO_INPUT | GPIO_ODR_HIGH)
 GPIO(FAN_SPEED,         PIN(050),  GPIO_INPUT)
 GPIO(FP_CTRL,		PIN(0245), GPIO_INPUT) /* Fingerprint control */
-GPIO(CAM_SW,		PIN(067),  GPIO_INPUT) /* (UNIMPLEMENTED) Monitor to close CAM PWR */
-GPIO(MIC_SW,		PIN(0175), GPIO_INPUT) /* (UNIMPLEMENTED) DMIC function */
 GPIO(SOC_EC_INT_L,	PIN(0246), GPIO_INPUT | GPIO_ODR_HIGH)    /* HID interrupt, notify host to read data */
 
 GPIO(TYPEC_G_DRV2_EN,	PIN(0101), GPIO_OUT_HIGH)    /* LED drv */

board/hx30/host_command_customization.c

@@ -349,3 +349,4 @@ static enum ec_status standalone_mode(struct host_cmd_handler_args *args)
 
 }
 DECLARE_HOST_COMMAND(EC_CMD_STANDALONE_MODE, standalone_mode, EC_VER_MASK(0));
+