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>

6 files changed, 221 insertions, 8 deletions

diff --git a/cts/common/dut_common.c b/cts/common/dut_common.c
index f8c18fd81c..9b0561eaa9 100644
--- a/cts/common/dut_common.c
+++ b/cts/common/dut_common.c
@@ -7,6 +7,7 @@
 #include "timer.h"
 #include "watchdog.h"
 #include "cts_common.h"
+#include "dut_common.h"
 
 /* Returns unknown because TH could potentially still get stuck
  * even if the DUT completes the sync
diff --git a/cts/common/th_common.c b/cts/common/th_common.c
index 1c75ef9dee..8e9bd47fa3 100644
--- a/cts/common/th_common.c
+++ b/cts/common/th_common.c
@@ -7,6 +7,7 @@
 #include "timer.h"
 #include "watchdog.h"
 #include "cts_common.h"
+#include "th_common.h"
 
 /* Return SUCCESS if and only if we reach end of function
  * Returning success here means sync was successful
diff --git a/cts/cts.py b/cts/cts.py
index 9c4940b6ff..79550a9aff 100755
--- a/cts/cts.py
+++ b/cts/cts.py
@@ -106,19 +106,17 @@ def flash_boards(dut_board, th_serial_loc):
                      'flash write_image erase build/' + th_board + '/ec.bin 0x08000000',
                      'reset halt']
 
-    dut_flash_cmds = ['reset_config connect_assert_srst',
+    dut_flash_cmds = ['hla_serial ' + dut_hla,
+                      'reset_config connect_assert_srst',
                       'init',
                       'reset init',
                       'flash write_image erase build/' + dut_board + '/ec.bin 0x08000000',
                       'reset halt']
 
-    if dut_hla != None:
-        dut_flash_cmds.insert(0, 'hla_serial ' + dut_hla)
-
     openocd_cmd(th_flash_cmds, th_cfg)
     openocd_cmd(dut_flash_cmds, dut_cfg)
-    openocd_cmd(['init', 'reset init', 'resume'], th_cfg)
-    openocd_cmd(['init', 'reset init', 'resume'], dut_cfg)
+    openocd_cmd(['hla_serial ' + th_hla, 'init', 'reset init', 'resume'], th_cfg)
+    openocd_cmd(['hla_serial ' + dut_hla, 'init', 'reset init', 'resume'], dut_cfg)
 
 def main():
     global ocd_script_dir
diff --git a/cts/gpio/dut.c b/cts/gpio/dut.c
index 7120a4da3e..c1b32ef0de 100644
--- a/cts/gpio/dut.c
+++ b/cts/gpio/dut.c
@@ -10,12 +10,109 @@
 #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)
+{
+	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 set_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 read_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 read_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 od_read_high_test(void)
+{
+	int level;
+
+	gpio_set_flags(GPIO_OUTPUT_TEST, GPIO_ODR_HIGH | GPIO_PULL_UP);
+	msleep(READ_WAIT_TIME_MS);
+	level = gpio_get_level(GPIO_OUTPUT_TEST);
+	if (!level)
+		return SUCCESS;
+	else
+		return FAILURE;
+}
 
 void cts_task(void)
 {
+	enum cts_error_code results[GPIO_CTS_TEST_COUNT];
+	int i;
+
+	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);
diff --git a/cts/gpio/gpio_common.h b/cts/gpio/gpio_common.h
new file mode 100644
index 0000000000..b19d23165a
--- /dev/null
+++ b/cts/gpio/gpio_common.h
@@ -0,0 +1,21 @@
+/* Copyright 2016 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.
+ */
+
+#ifndef __GPIO_COMMON_H
+#define __GPIO_COMMON_H
+
+/* sync_test tests whether sync completes successfully
+ * set_low_test checks if the dut can set a line low
+ * set_high test checks if the dut can set a line high
+ * read_low_test checks if the dut can read a line that is low
+ * read_high_test checks if the dut can read a line that is high
+ * od_read_high_test checks if the dut reads its true pin level (success)
+ * or its register level when configured as a low open drain output pin
+   */
+
+#define READ_WAIT_TIME_MS 100
+#define GPIO_CTS_TEST_COUNT 6
+
+#endif
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);