Add extpower-gpio unit test

This tests host event and hook are triggered when AC status changes.

BUG=chrome-os-partner:19236
TEST=Pass the test.
BRANCH=None

Change-Id: I9e4263f3f6e273bfb0b24671a4e5c56b20a04e1a
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/61554
Reviewed-by: Randall Spangler <rspangler@chromium.org>

board/host/board.c

@@ -8,12 +8,15 @@
 #include "gpio.h"
 #include "temp_sensor.h"
 
+#define MOCK_GPIO(x) {#x, 0, 0, 0, 0}
+
 const struct gpio_info gpio_list[GPIO_COUNT] = {
-	{"EC_INT", 0, 0, 0, 0},
-	{"LID_OPEN", 0, 0, 0, 0},
-	{"POWER_BUTTON_L", 0, 0, 0, 0},
-	{"WP", 0, 0, 0, 0},
-	{"ENTERING_RW", 0, 0, 0, 0},
+	MOCK_GPIO(EC_INT),
+	MOCK_GPIO(LID_OPEN),
+	MOCK_GPIO(POWER_BUTTON_L),
+	MOCK_GPIO(WP),
+	MOCK_GPIO(ENTERING_RW),
+	MOCK_GPIO(AC_PRESENT),
 };
 
 static int dummy_temp_get_val(int idx, int *temp_ptr)

board/host/board.h

@@ -13,6 +13,7 @@
 #define CONFIG_ASSERT_HELP
 
 /* Optional features */
+#define CONFIG_EXTPOWER_GPIO
 #define CONFIG_HOSTCMD
 #define CONFIG_HOST_EMU
 #define CONFIG_LID_SWITCH
@@ -34,6 +35,7 @@ enum gpio_signal {
 	GPIO_POWER_BUTTON_L,
 	GPIO_WP,
 	GPIO_ENTERING_RW,
+	GPIO_AC_PRESENT,
 
 	GPIO_COUNT
 };

test/build.mk

@@ -29,8 +29,9 @@ test-list-$(BOARD_wolf)=
 
 # Emulator tests
 test-list-host=mutex pingpong utils kb_scan kb_mkbp lid_sw power_button hooks
-test-list-host+=thermal flash queue kb_8042
+test-list-host+=thermal flash queue kb_8042 extpwr_gpio
 
+extpwr_gpio-y=extpwr_gpio.o
 flash-y=flash.o
 hooks-y=hooks.o
 kb_8042-y=kb_8042.o

test/extpwr_gpio.c

@@ -0,0 +1,72 @@
+/* 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.
+ *
+ * Test GPIO extpower module.
+ */
+
+#include "common.h"
+#include "console.h"
+#include "extpower.h"
+#include "gpio.h"
+#include "hooks.h"
+#include "host_command.h"
+#include "test_util.h"
+#include "timer.h"
+#include "util.h"
+
+static int mock_ac;
+static int ac_hook_count;
+
+int gpio_get_level(enum gpio_signal signal)
+{
+	if (signal == GPIO_AC_PRESENT)
+		return mock_ac;
+	return 0;
+}
+
+static void set_ac(int val)
+{
+	if (val == mock_ac)
+		return;
+	mock_ac = val;
+	extpower_interrupt(GPIO_AC_PRESENT);
+	msleep(50);
+}
+
+static void ac_change_hook(void)
+{
+	ac_hook_count++;
+}
+DECLARE_HOOK(HOOK_AC_CHANGE, ac_change_hook, HOOK_PRIO_DEFAULT);
+
+static int test_hook(void)
+{
+	/* Remove AC for testing */
+	set_ac(0);
+	ac_hook_count = 0;
+	host_clear_events(0xffffffff);
+
+	set_ac(1);
+	TEST_ASSERT(ac_hook_count == 1);
+	TEST_ASSERT(extpower_is_present());
+	TEST_ASSERT(host_get_events() &
+		    EC_HOST_EVENT_MASK(EC_HOST_EVENT_AC_CONNECTED));
+
+	set_ac(0);
+	TEST_ASSERT(ac_hook_count == 2);
+	TEST_ASSERT(!extpower_is_present());
+	TEST_ASSERT(host_get_events() &
+		    EC_HOST_EVENT_MASK(EC_HOST_EVENT_AC_DISCONNECTED));
+
+	return EC_SUCCESS;
+}
+
+void run_test(void)
+{
+	test_reset();
+
+	RUN_TEST(test_hook);
+
+	test_print_result();
+}

test/extpwr_gpio.tasklist

@@ -0,0 +1,17 @@
+/* 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.
+ */
+
+/**
+ * List of enabled tasks in the priority order
+ *
+ * The first one has the lowest priority.
+ *
+ * For each task, use the macro TASK_TEST(n, r, d, s) where :
+ * 'n' in the name of the task
+ * 'r' in the main routine of the task
+ * 'd' in an opaque parameter passed to the routine at startup
+ * 's' is the stack size in bytes; must be a multiple of 8
+ */
+#define CONFIG_TEST_TASK_LIST  /* No test task */