cts: Added GPIO test suite

Contains code for all the gpio tests so far. Code in
cts_task for th and dut is for testing purposes and
test result reporting will be updated in the next
patch.

BRANCH=None
BUG=None
TEST=Manual
- Connect handshake and gpio test lines between th and dut
- Build tests
- run 'cat /dev/ttyACM0' in one terminal
- run 'cat /def/ttyACM1' in another
- Flash boards
- All test results should print either passed or unknown

Change-Id: I7142fb87a6ce0a20c571cde608fbbe60e35898ea
Reviewed-on: https://chromium-review.googlesource.com/359935
Commit-Ready: Daisuke Nojiri <dnojiri@chromium.org>
Tested-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>

1 files changed, 96 insertions, 1 deletions

diff --git a/cts/gpio/th.c b/cts/gpio/th.c
index 7120a4da3e..ddc46f6602 100644
--- a/cts/gpio/th.c
+++ b/cts/gpio/th.c
@@ -10,12 +10,107 @@
 #include "watchdog.h"
 #include "dut_common.h"
 #include "cts_common.h"
+#include "gpio_common.h"
+
+enum cts_error_code sync_test(void)
+{
+	return SUCCESS;
+}
+
+enum cts_error_code set_high_test(void)
+{
+	int level;
+
+	gpio_set_flags(GPIO_INPUT_TEST, GPIO_INPUT | GPIO_PULL_UP);
+	msleep(READ_WAIT_TIME_MS);
+	level = gpio_get_level(GPIO_INPUT_TEST);
+	if (level)
+		return SUCCESS;
+	else
+		return FAILURE;
+}
+
+enum cts_error_code set_low_test(void)
+{
+	int level;
+
+	gpio_set_flags(GPIO_INPUT_TEST, GPIO_INPUT | GPIO_PULL_UP);
+	msleep(READ_WAIT_TIME_MS);
+	level = gpio_get_level(GPIO_INPUT_TEST);
+	if (!level)
+		return SUCCESS;
+	else
+		return FAILURE;
+}
+
+enum cts_error_code read_high_test(void)
+{
+	gpio_set_flags(GPIO_OUTPUT_TEST, GPIO_ODR_LOW);
+	gpio_set_level(GPIO_OUTPUT_TEST, 1);
+	msleep(READ_WAIT_TIME_MS*2);
+	return UNKNOWN;
+}
+
+enum cts_error_code read_low_test(void)
+{
+	gpio_set_flags(GPIO_OUTPUT_TEST, GPIO_ODR_LOW);
+	gpio_set_level(GPIO_OUTPUT_TEST, 0);
+	msleep(READ_WAIT_TIME_MS*2);
+	return UNKNOWN;
+}
+
+enum cts_error_code od_read_high_test(void)
+{
+	gpio_set_flags(GPIO_INPUT_TEST, GPIO_OUTPUT | GPIO_ODR_LOW);
+	msleep(READ_WAIT_TIME_MS*2);
+	return UNKNOWN;
+}
 
 void cts_task(void)
 {
+	enum cts_error_code results[GPIO_CTS_TEST_COUNT];
+	int i;
+
+	/* Don't bother checking sync's return value now because
+	 * host will deal with hanging syncs/tests as well as
+	 * interpreting test results later
+	 */
+	sync();
+	results[0] = sync_test();
 	sync();
-	CPRINTS("Successful Sync!");
+	results[1] = set_low_test();
+	sync();
+	results[2] = set_high_test();
+	sync();
+	results[3] = read_high_test();
+	sync();
+	results[4] = read_low_test();
+	sync();
+	results[5] = od_read_high_test();
+
+	CPRINTS("GPIO test suite finished");
 	uart_flush_output();
+	CPRINTS("Results:");
+	for (i = 0; i < GPIO_CTS_TEST_COUNT; i++) {
+		switch (results[i]) {
+		case SUCCESS:
+			CPRINTS("%d) Passed", i);
+			break;
+		case FAILURE:
+			CPRINTS("%d) Failed", i);
+			break;
+		case BAD_SYNC:
+			CPRINTS("%d) Bad sync", i);
+			break;
+		case UNKNOWN:
+			CPRINTS("%d) Test result unknown", i);
+			break;
+		default:
+			CPRINTS("%d) ErrorCode not recognized", i);
+			break;
+		}
+	}
+
 	while (1) {
 		watchdog_reload();
 		sleep(1);