tests/qtest : Add testcase for DM163pull-target-arm-20240430target-arm.nexttarget-arm.for-upstream

`test_dm163_bank()`
Checks that the pin "sout" of the DM163 led driver outputs the values
received on pin "sin" with the expected latency (depending on the bank).

`test_dm163_gpio_connection()`
Check that changes to relevant STM32L4x5 GPIO pins are propagated to the
DM163 device.

Signed-off-by: Arnaud Minier <arnaud.minier@telecom-paris.fr>
Signed-off-by: Inès Varhol <ines.varhol@telecom-paris.fr>
Acked-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20240424200929.240921-6-ines.varhol@telecom-paris.fr
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 196 insertions, 0 deletions

diff --git a/tests/qtest/dm163-test.c b/tests/qtest/dm163-test.c
new file mode 100644
index 0000000000..3161c9208d
--- /dev/null
+++ b/tests/qtest/dm163-test.c
@@ -0,0 +1,194 @@
+/*
+ * QTest testcase for DM163
+ *
+ * Copyright (C) 2024 Samuel Tardieu <sam@rfc1149.net>
+ * Copyright (C) 2024 Arnaud Minier <arnaud.minier@telecom-paris.fr>
+ * Copyright (C) 2024 Inès Varhol <ines.varhol@telecom-paris.fr>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest.h"
+
+enum DM163_INPUTS {
+    SIN = 8,
+    DCK = 9,
+    RST_B = 10,
+    LAT_B = 11,
+    SELBK = 12,
+    EN_B = 13
+};
+
+#define DEVICE_NAME "/machine/dm163"
+#define GPIO_OUT(name, value) qtest_set_irq_in(qts, DEVICE_NAME, NULL, name,   \
+                                               value)
+#define GPIO_PULSE(name)                                                       \
+  do {                                                                         \
+    GPIO_OUT(name, 1);                                                         \
+    GPIO_OUT(name, 0);                                                         \
+  } while (0)
+
+
+static void rise_gpio_pin_dck(QTestState *qts)
+{
+    /* Configure output mode for pin PB1 */
+    qtest_writel(qts, 0x48000400, 0xFFFFFEB7);
+    /* Write 1 in ODR for PB1 */
+    qtest_writel(qts, 0x48000414, 0x00000002);
+}
+
+static void lower_gpio_pin_dck(QTestState *qts)
+{
+    /* Configure output mode for pin PB1 */
+    qtest_writel(qts, 0x48000400, 0xFFFFFEB7);
+    /* Write 0 in ODR for PB1 */
+    qtest_writel(qts, 0x48000414, 0x00000000);
+}
+
+static void rise_gpio_pin_selbk(QTestState *qts)
+{
+    /* Configure output mode for pin PC5 */
+    qtest_writel(qts, 0x48000800, 0xFFFFF7FF);
+    /* Write 1 in ODR for PC5 */
+    qtest_writel(qts, 0x48000814, 0x00000020);
+}
+
+static void lower_gpio_pin_selbk(QTestState *qts)
+{
+    /* Configure output mode for pin PC5 */
+    qtest_writel(qts, 0x48000800, 0xFFFFF7FF);
+    /* Write 0 in ODR for PC5 */
+    qtest_writel(qts, 0x48000814, 0x00000000);
+}
+
+static void rise_gpio_pin_lat_b(QTestState *qts)
+{
+    /* Configure output mode for pin PC4 */
+    qtest_writel(qts, 0x48000800, 0xFFFFFDFF);
+    /* Write 1 in ODR for PC4 */
+    qtest_writel(qts, 0x48000814, 0x00000010);
+}
+
+static void lower_gpio_pin_lat_b(QTestState *qts)
+{
+    /* Configure output mode for pin PC4 */
+    qtest_writel(qts, 0x48000800, 0xFFFFFDFF);
+    /* Write 0 in ODR for PC4 */
+    qtest_writel(qts, 0x48000814, 0x00000000);
+}
+
+static void rise_gpio_pin_rst_b(QTestState *qts)
+{
+    /* Configure output mode for pin PC3 */
+    qtest_writel(qts, 0x48000800, 0xFFFFFF7F);
+    /* Write 1 in ODR for PC3 */
+    qtest_writel(qts, 0x48000814, 0x00000008);
+}
+
+static void lower_gpio_pin_rst_b(QTestState *qts)
+{
+    /* Configure output mode for pin PC3 */
+    qtest_writel(qts, 0x48000800, 0xFFFFFF7F);
+    /* Write 0 in ODR for PC3 */
+    qtest_writel(qts, 0x48000814, 0x00000000);
+}
+
+static void rise_gpio_pin_sin(QTestState *qts)
+{
+    /* Configure output mode for pin PA4 */
+    qtest_writel(qts, 0x48000000, 0xFFFFFDFF);
+    /* Write 1 in ODR for PA4 */
+    qtest_writel(qts, 0x48000014, 0x00000010);
+}
+
+static void lower_gpio_pin_sin(QTestState *qts)
+{
+    /* Configure output mode for pin PA4 */
+    qtest_writel(qts, 0x48000000, 0xFFFFFDFF);
+    /* Write 0 in ODR for PA4 */
+    qtest_writel(qts, 0x48000014, 0x00000000);
+}
+
+static void test_dm163_bank(const void *opaque)
+{
+    const unsigned bank = (uintptr_t) opaque;
+    const int width = bank ? 192 : 144;
+
+    QTestState *qts = qtest_initf("-M b-l475e-iot01a");
+    qtest_irq_intercept_out_named(qts, DEVICE_NAME, "sout");
+    GPIO_OUT(RST_B, 1);
+    GPIO_OUT(EN_B, 0);
+    GPIO_OUT(DCK, 0);
+    GPIO_OUT(SELBK, bank);
+    GPIO_OUT(LAT_B, 1);
+
+    /* Fill bank with zeroes */
+    GPIO_OUT(SIN, 0);
+    for (int i = 0; i < width; i++) {
+        GPIO_PULSE(DCK);
+    }
+    /* Fill bank with ones, check that we get the previous zeroes */
+    GPIO_OUT(SIN, 1);
+    for (int i = 0; i < width; i++) {
+        GPIO_PULSE(DCK);
+        g_assert(!qtest_get_irq(qts, 0));
+    }
+
+    /* Pulse one more bit in the bank, check that we get a one */
+    GPIO_PULSE(DCK);
+    g_assert(qtest_get_irq(qts, 0));
+
+    qtest_quit(qts);
+}
+
+static void test_dm163_gpio_connection(void)
+{
+    QTestState *qts = qtest_init("-M b-l475e-iot01a");
+    qtest_irq_intercept_in(qts, DEVICE_NAME);
+
+    g_assert_false(qtest_get_irq(qts, SIN));
+    g_assert_false(qtest_get_irq(qts, DCK));
+    g_assert_false(qtest_get_irq(qts, RST_B));
+    g_assert_false(qtest_get_irq(qts, LAT_B));
+    g_assert_false(qtest_get_irq(qts, SELBK));
+
+    rise_gpio_pin_dck(qts);
+    g_assert_true(qtest_get_irq(qts, DCK));
+    lower_gpio_pin_dck(qts);
+    g_assert_false(qtest_get_irq(qts, DCK));
+
+    rise_gpio_pin_lat_b(qts);
+    g_assert_true(qtest_get_irq(qts, LAT_B));
+    lower_gpio_pin_lat_b(qts);
+    g_assert_false(qtest_get_irq(qts, LAT_B));
+
+    rise_gpio_pin_selbk(qts);
+    g_assert_true(qtest_get_irq(qts, SELBK));
+    lower_gpio_pin_selbk(qts);
+    g_assert_false(qtest_get_irq(qts, SELBK));
+
+    rise_gpio_pin_rst_b(qts);
+    g_assert_true(qtest_get_irq(qts, RST_B));
+    lower_gpio_pin_rst_b(qts);
+    g_assert_false(qtest_get_irq(qts, RST_B));
+
+    rise_gpio_pin_sin(qts);
+    g_assert_true(qtest_get_irq(qts, SIN));
+    lower_gpio_pin_sin(qts);
+    g_assert_false(qtest_get_irq(qts, SIN));
+
+    g_assert_false(qtest_get_irq(qts, DCK));
+    g_assert_false(qtest_get_irq(qts, LAT_B));
+    g_assert_false(qtest_get_irq(qts, SELBK));
+    g_assert_false(qtest_get_irq(qts, RST_B));
+}
+
+int main(int argc, char **argv)
+{
+    g_test_init(&argc, &argv, NULL);
+    qtest_add_data_func("/dm163/bank0", (void *)0, test_dm163_bank);
+    qtest_add_data_func("/dm163/bank1", (void *)1, test_dm163_bank);
+    qtest_add_func("/dm163/gpio_connection", test_dm163_gpio_connection);
+    return g_test_run();
+}
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index b128fa5a4b..6f2f594ace 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -224,6 +224,8 @@ qtests_arm = \
   (config_all_devices.has_key('CONFIG_MICROBIT') ? ['microbit-test'] : []) + \
   (config_all_devices.has_key('CONFIG_STM32L4X5_SOC') ? qtests_stm32l4x5 : []) + \
   (config_all_devices.has_key('CONFIG_FSI_APB2OPB_ASPEED') ? ['aspeed_fsi-test'] : []) + \
+  (config_all_devices.has_key('CONFIG_STM32L4X5_SOC') and
+   config_all_devices.has_key('CONFIG_DM163')? ['dm163-test'] : []) + \
   ['arm-cpu-features',
    'boot-serial-test']