/* * QTest testcase for STM32L4x5_GPIO * * Copyright (c) 2024 Arnaud Minier * Copyright (c) 2024 Inès Varhol * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. */ #include "qemu/osdep.h" #include "libqtest-single.h" #define GPIO_BASE_ADDR 0x48000000 #define GPIO_SIZE 0x400 #define NUM_GPIOS 8 #define NUM_GPIO_PINS 16 #define GPIO_A 0x48000000 #define GPIO_B 0x48000400 #define GPIO_C 0x48000800 #define GPIO_D 0x48000C00 #define GPIO_E 0x48001000 #define GPIO_F 0x48001400 #define GPIO_G 0x48001800 #define GPIO_H 0x48001C00 #define MODER 0x00 #define OTYPER 0x04 #define PUPDR 0x0C #define IDR 0x10 #define ODR 0x14 #define BSRR 0x18 #define BRR 0x28 #define MODER_INPUT 0 #define MODER_OUTPUT 1 #define PUPDR_NONE 0 #define PUPDR_PULLUP 1 #define PUPDR_PULLDOWN 2 #define OTYPER_PUSH_PULL 0 #define OTYPER_OPEN_DRAIN 1 /* SoC forwards GPIOs to SysCfg */ #define SYSCFG "/machine/soc" const uint32_t moder_reset[NUM_GPIOS] = { 0xABFFFFFF, 0xFFFFFEBF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x0000000F }; const uint32_t pupdr_reset[NUM_GPIOS] = { 0x64000000, 0x00000100, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }; const uint32_t idr_reset[NUM_GPIOS] = { 0x0000A000, 0x00000010, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }; #define PIN_MASK 0xF #define GPIO_ADDR_MASK (~(GPIO_SIZE - 1)) static inline void *test_data(uint32_t gpio_addr, uint8_t pin) { return (void *)(uintptr_t)((gpio_addr & GPIO_ADDR_MASK) | (pin & PIN_MASK)); } #define test_gpio_addr(data) ((uintptr_t)(data) & GPIO_ADDR_MASK) #define test_pin(data) ((uintptr_t)(data) & PIN_MASK) static uint32_t gpio_readl(unsigned int gpio, unsigned int offset) { return readl(gpio + offset); } static void gpio_writel(unsigned int gpio, unsigned int offset, uint32_t value) { writel(gpio + offset, value); } static void gpio_set_bit(unsigned int gpio, unsigned int reg, unsigned int pin, uint32_t value) { uint32_t mask = 0xFFFFFFFF & ~(0x1 << pin); gpio_writel(gpio, reg, (gpio_readl(gpio, reg) & mask) | value << pin); } static void gpio_set_2bits(unsigned int gpio, unsigned int reg, unsigned int pin, uint32_t value) { uint32_t offset = 2 * pin; uint32_t mask = 0xFFFFFFFF & ~(0x3 << offset); gpio_writel(gpio, reg, (gpio_readl(gpio, reg) & mask) | value << offset); } static unsigned int get_gpio_id(uint32_t gpio_addr) { return (gpio_addr - GPIO_BASE_ADDR) / GPIO_SIZE; } static void gpio_set_irq(unsigned int gpio, int num, int level) { g_autofree char *name = g_strdup_printf("/machine/soc/gpio%c", get_gpio_id(gpio) + 'a'); qtest_set_irq_in(global_qtest, name, NULL, num, level); } static void disconnect_all_pins(unsigned int gpio) { g_autofree char *path = g_strdup_printf("/machine/soc/gpio%c", get_gpio_id(gpio) + 'a'); QDict *r; r = qtest_qmp(global_qtest, "{ 'execute': 'qom-set', 'arguments': " "{ 'path': %s, 'property': 'disconnected-pins', 'value': %d } }", path, 0xFFFF); g_assert_false(qdict_haskey(r, "error")); qobject_unref(r); } static uint32_t get_disconnected_pins(unsigned int gpio) { g_autofree char *path = g_strdup_printf("/machine/soc/gpio%c", get_gpio_id(gpio) + 'a'); uint32_t disconnected_pins = 0; QDict *r; r = qtest_qmp(global_qtest, "{ 'execute': 'qom-get', 'arguments':" " { 'path': %s, 'property': 'disconnected-pins'} }", path); g_assert_false(qdict_haskey(r, "error")); disconnected_pins = qdict_get_int(r, "return"); qobject_unref(r); return disconnected_pins; } static uint32_t reset(uint32_t gpio, unsigned int offset) { switch (offset) { case MODER: return moder_reset[get_gpio_id(gpio)]; case PUPDR: return pupdr_reset[get_gpio_id(gpio)]; case IDR: return idr_reset[get_gpio_id(gpio)]; } return 0x0; } static void system_reset(void) { QDict *r; r = qtest_qmp(global_qtest, "{'execute': 'system_reset'}"); g_assert_false(qdict_haskey(r, "error")); qobject_unref(r); } static void test_idr_reset_value(void) { /* * Checks that the values in MODER, OTYPER, PUPDR and ODR * after reset are correct, and that the value in IDR is * coherent. * Since AF and analog modes aren't implemented, IDR reset * values aren't the same as with a real board. * * Register IDR contains the actual values of all GPIO pins. * Its value depends on the pins' configuration * (intput/output/analog : register MODER, push-pull/open-drain : * register OTYPER, pull-up/pull-down/none : register PUPDR) * and on the values stored in register ODR * (in case the pin is in output mode). */ gpio_writel(GPIO_A, MODER, 0xDEADBEEF); gpio_writel(GPIO_A, ODR, 0xDEADBEEF); gpio_writel(GPIO_A, OTYPER, 0xDEADBEEF); gpio_writel(GPIO_A, PUPDR, 0xDEADBEEF); gpio_writel(GPIO_B, MODER, 0xDEADBEEF); gpio_writel(GPIO_B, ODR, 0xDEADBEEF); gpio_writel(GPIO_B, OTYPER, 0xDEADBEEF); gpio_writel(GPIO_B, PUPDR, 0xDEADBEEF); gpio_writel(GPIO_C, MODER, 0xDEADBEEF); gpio_writel(GPIO_C, ODR, 0xDEADBEEF); gpio_writel(GPIO_C, OTYPER, 0xDEADBEEF); gpio_writel(GPIO_C, PUPDR, 0xDEADBEEF); gpio_writel(GPIO_H, MODER, 0xDEADBEEF); gpio_writel(GPIO_H, ODR, 0xDEADBEEF); gpio_writel(GPIO_H, OTYPER, 0xDEADBEEF); gpio_writel(GPIO_H, PUPDR, 0xDEADBEEF); system_reset(); uint32_t moder = gpio_readl(GPIO_A, MODER); uint32_t odr = gpio_readl(GPIO_A, ODR); uint32_t otyper = gpio_readl(GPIO_A, OTYPER); uint32_t pupdr = gpio_readl(GPIO_A, PUPDR); uint32_t idr = gpio_readl(GPIO_A, IDR); /* 15: AF, 14: AF, 13: AF, 12: Analog ... */ /* here AF is the same as Analog and Input mode */ g_assert_cmphex(moder, ==, reset(GPIO_A, MODER)); g_assert_cmphex(odr, ==, reset(GPIO_A, ODR)); g_assert_cmphex(otyper, ==, reset(GPIO_A, OTYPER)); /* 15: pull-up, 14: pull-down, 13: pull-up, 12: neither ... */ g_assert_cmphex(pupdr, ==, reset(GPIO_A, PUPDR)); /* 15 : 1, 14: 0, 13: 1, 12 : reset value ... */ g_assert_cmphex(idr, ==, reset(GPIO_A, IDR)); moder = gpio_readl(GPIO_B, MODER); odr = gpio_readl(GPIO_B, ODR); otyper = gpio_readl(GPIO_B, OTYPER); pupdr = gpio_readl(GPIO_B, PUPDR); idr = gpio_readl(GPIO_B, IDR); /* ... 5: Analog, 4: AF, 3: AF, 2: Analog ... */ /* here AF is the same as Analog and Input mode */ g_assert_cmphex(moder, ==, reset(GPIO_B, MODER)); g_assert_cmphex(odr, ==, reset(GPIO_B, ODR)); g_assert_cmphex(otyper, ==, reset(GPIO_B, OTYPER)); /* ... 5: neither, 4: pull-up, 3: neither ... */ g_assert_cmphex(pupdr, ==, reset(GPIO_B, PUPDR)); /* ... 5 : reset value, 4 : 1, 3 : reset value ... */ g_assert_cmphex(idr, ==, reset(GPIO_B, IDR)); moder = gpio_readl(GPIO_C, MODER); odr = gpio_readl(GPIO_C, ODR); otyper = gpio_readl(GPIO_C, OTYPER); pupdr = gpio_readl(GPIO_C, PUPDR); idr = gpio_readl(GPIO_C, IDR); /* Analog, same as Input mode*/ g_assert_cmphex(moder, ==, reset(GPIO_C, MODER)); g_assert_cmphex(odr, ==, reset(GPIO_C, ODR)); g_assert_cmphex(otyper, ==, reset(GPIO_C, OTYPER)); /* no pull-up or pull-down */ g_assert_cmphex(pupdr, ==, reset(GPIO_C, PUPDR)); /* reset value */ g_assert_cmphex(idr, ==, reset(GPIO_C, IDR)); moder = gpio_readl(GPIO_H, MODER); odr = gpio_readl(GPIO_H, ODR); otyper = gpio_readl(GPIO_H, OTYPER); pupdr = gpio_readl(GPIO_H, PUPDR); idr = gpio_readl(GPIO_H, IDR); /* Analog, same as Input mode */ g_assert_cmphex(moder, ==, reset(GPIO_H, MODER)); g_assert_cmphex(odr, ==, reset(GPIO_H, ODR)); g_assert_cmphex(otyper, ==, reset(GPIO_H, OTYPER)); /* no pull-up or pull-down */ g_assert_cmphex(pupdr, ==, reset(GPIO_H, PUPDR)); /* reset value */ g_assert_cmphex(idr, ==, reset(GPIO_H, IDR)); } static void test_gpio_output_mode(const void *data) { /* * Checks that setting a bit in ODR sets the corresponding * GPIO line high : it should set the right bit in IDR * and send an irq to syscfg. * Additionally, it checks that values written to ODR * when not in output mode are stored and not discarded. */ unsigned int pin = test_pin(data); uint32_t gpio = test_gpio_addr(data); unsigned int gpio_id = get_gpio_id(gpio); qtest_irq_intercept_in(global_qtest, SYSCFG); /* Set a bit in ODR and check nothing happens */ gpio_set_bit(gpio, ODR, pin, 1); g_assert_cmphex(gpio_readl(gpio, IDR), ==, reset(gpio, IDR)); g_assert_false(get_irq(gpio_id * NUM_GPIO_PINS + pin)); /* Configure the relevant line as output and check the pin is high */ gpio_set_2bits(gpio, MODER, pin, MODER_OUTPUT); g_assert_cmphex(gpio_readl(gpio, IDR), ==, reset(gpio, IDR) | (1 << pin)); g_assert_true(get_irq(gpio_id * NUM_GPIO_PINS + pin)); /* Reset the bit in ODR and check the pin is low */ gpio_set_bit(gpio, ODR, pin, 0); g_assert_cmphex(gpio_readl(gpio, IDR), ==, reset(gpio, IDR) & ~(1 << pin)); g_assert_false(get_irq(gpio_id * NUM_GPIO_PINS + pin)); /* Clean the test */ gpio_writel(gpio, ODR, reset(gpio, ODR)); gpio_writel(gpio, MODER, reset(gpio, MODER)); g_assert_cmphex(gpio_readl(gpio, IDR), ==, reset(gpio, IDR)); g_assert_false(get_irq(gpio_id * NUM_GPIO_PINS + pin)); } static void test_gpio_input_mode(const void *data) { /* * Test that setting a line high/low externally sets the * corresponding GPIO line high/low : it should set the * right bit in IDR and send an irq to syscfg. */ unsigned int pin = test_pin(data); uint32_t gpio = test_gpio_addr(data); unsigned int gpio_id = get_gpio_id(gpio); qtest_irq_intercept_in(global_qtest, SYSCFG); /* Configure a line as input, raise it, and check that the pin is high */ gpio_set_2bits(gpio, MODER, pin, MODER_INPUT); gpio_set_irq(gpio, pin, 1); g_assert_cmphex(gpio_readl(gpio, IDR), ==, reset(gpio, IDR) | (1 << pin)); g_assert_true(get_irq(gpio_id * NUM_GPIO_PINS + pin)); /* Lower the line and check that the pin is low */ gpio_set_irq(gpio, pin, 0); g_assert_cmphex(gpio_readl(gpio, IDR), ==, reset(gpio, IDR) & ~(1 << pin)); g_assert_false(get_irq(gpio_id * NUM_GPIO_PINS + pin)); /* Clean the test */ gpio_writel(gpio, MODER, reset(gpio, MODER)); disconnect_all_pins(gpio); g_assert_cmphex(gpio_readl(gpio, IDR), ==, reset(gpio, IDR)); } static void test_pull_up_pull_down(const void *data) { /* * Test that a floating pin with pull-up sets the pin * high and vice-versa. */ unsigned int pin = test_pin(data); uint32_t gpio = test_gpio_addr(data); unsigned int gpio_id = get_gpio_id(gpio); qtest_irq_intercept_in(global_qtest, SYSCFG); /* Configure a line as input with pull-up, check the line is set high */ gpio_set_2bits(gpio, MODER, pin, MODER_INPUT); gpio_set_2bits(gpio, PUPDR, pin, PUPDR_PULLUP); g_assert_cmphex(gpio_readl(gpio, IDR), ==, reset(gpio, IDR) | (1 << pin)); g_assert_true(get_irq(gpio_id * NUM_GPIO_PINS + pin)); /* Configure the line with pull-down, check the line is low */ gpio_set_2bits(gpio, PUPDR, pin, PUPDR_PULLDOWN); g_assert_cmphex(gpio_readl(gpio, IDR), ==, reset(gpio, IDR) & ~(1 << pin)); g_assert_false(get_irq(gpio_id * NUM_GPIO_PINS + pin)); /* Clean the test */ gpio_writel(gpio, MODER, reset(gpio, MODER)); gpio_writel(gpio, PUPDR, reset(gpio, PUPDR)); g_assert_cmphex(gpio_readl(gpio, IDR), ==, reset(gpio, IDR)); } static void test_push_pull(const void *data) { /* * Test that configuring a line in push-pull output mode * disconnects the pin, that the pin can't be set or reset * externally afterwards. */ unsigned int pin = test_pin(data); uint32_t gpio = test_gpio_addr(data); uint32_t gpio2 = GPIO_BASE_ADDR + (GPIO_H - gpio); qtest_irq_intercept_in(global_qtest, SYSCFG); /* Setting a line high externally, configuring it in push-pull output */ /* And checking the pin was disconnected */ gpio_set_irq(gpio, pin, 1); gpio_set_2bits(gpio, MODER, pin, MODER_OUTPUT); g_assert_cmphex(get_disconnected_pins(gpio), ==, 0xFFFF); g_assert_cmphex(gpio_readl(gpio, IDR), ==, reset(gpio, IDR) & ~(1 << pin)); /* Setting a line low externally, configuring it in push-pull output */ /* And checking the pin was disconnected */ gpio_set_irq(gpio2, pin, 0); gpio_set_bit(gpio2, ODR, pin, 1); gpio_set_2bits(gpio2, MODER, pin, MODER_OUTPUT); g_assert_cmphex(get_disconnected_pins(gpio2), ==, 0xFFFF); g_assert_cmphex(gpio_readl(gpio2, IDR), ==, reset(gpio2, IDR) | (1 << pin)); /* Trying to set a push-pull output pin, checking it doesn't work */ gpio_set_irq(gpio, pin, 1); g_assert_cmphex(get_disconnected_pins(gpio), ==, 0xFFFF); g_assert_cmphex(gpio_readl(gpio, IDR), ==, reset(gpio, IDR) & ~(1 << pin)); /* Trying to reset a push-pull output pin, checking it doesn't work */ gpio_set_irq(gpio2, pin, 0); g_assert_cmphex(get_disconnected_pins(gpio2), ==, 0xFFFF); g_assert_cmphex(gpio_readl(gpio2, IDR), ==, reset(gpio2, IDR) | (1 << pin)); /* Clean the test */ gpio_writel(gpio, MODER, reset(gpio, MODER)); gpio_writel(gpio2, ODR, reset(gpio2, ODR)); gpio_writel(gpio2, MODER, reset(gpio2, MODER)); } static void test_open_drain(const void *data) { /* * Test that configuring a line in open-drain output mode * disconnects a pin set high externally and that the pin * can't be set high externally while configured in open-drain. * * However a pin set low externally shouldn't be disconnected, * and it can be set low externally when in open-drain mode. */ unsigned int pin = test_pin(data); uint32_t gpio = test_gpio_addr(data); uint32_t gpio2 = GPIO_BASE_ADDR + (GPIO_H - gpio); qtest_irq_intercept_in(global_qtest, SYSCFG); /* Setting a line high externally, configuring it in open-drain output */ /* And checking the pin was disconnected */ gpio_set_irq(gpio, pin, 1); gpio_set_bit(gpio, OTYPER, pin, OTYPER_OPEN_DRAIN); gpio_set_2bits(gpio, MODER, pin, MODER_OUTPUT); g_assert_cmphex(get_disconnected_pins(gpio), ==, 0xFFFF); g_assert_cmphex(gpio_readl(gpio, IDR), ==, reset(gpio, IDR) & ~(1 << pin)); /* Setting a line low externally, configuring it in open-drain output */ /* And checking the pin wasn't disconnected */ gpio_set_irq(gpio2, pin, 0); gpio_set_bit(gpio2, ODR, pin, 1); gpio_set_bit(gpio2, OTYPER, pin, OTYPER_OPEN_DRAIN); gpio_set_2bits(gpio2, MODER, pin, MODER_OUTPUT); g_assert_cmphex(get_disconnected_pins(gpio2), ==, 0xFFFF & ~(1 << pin)); g_assert_cmphex(gpio_readl(gpio2, IDR), ==, reset(gpio2, IDR) & ~(1 << pin)); /* Trying to set a open-drain output pin, checking it doesn't work */ gpio_set_irq(gpio, pin, 1); g_assert_cmphex(get_disconnected_pins(gpio), ==, 0xFFFF); g_assert_cmphex(gpio_readl(gpio, IDR), ==, reset(gpio, IDR) & ~(1 << pin)); /* Trying to reset a open-drain output pin, checking it works */ gpio_set_bit(gpio, ODR, pin, 1); gpio_set_irq(gpio, pin, 0); g_assert_cmphex(get_disconnected_pins(gpio2), ==, 0xFFFF & ~(1 << pin)); g_assert_cmphex(gpio_readl(gpio2, IDR), ==, reset(gpio2, IDR) & ~(1 << pin)); /* Clean the test */ disconnect_all_pins(gpio2); gpio_writel(gpio2, OTYPER, reset(gpio2, OTYPER)); gpio_writel(gpio2, ODR, reset(gpio2, ODR)); gpio_writel(gpio2, MODER, reset(gpio2, MODER)); g_assert_cmphex(gpio_readl(gpio2, IDR), ==, reset(gpio2, IDR)); disconnect_all_pins(gpio); gpio_writel(gpio, OTYPER, reset(gpio, OTYPER)); gpio_writel(gpio, ODR, reset(gpio, ODR)); gpio_writel(gpio, MODER, reset(gpio, MODER)); g_assert_cmphex(gpio_readl(gpio, IDR), ==, reset(gpio, IDR)); } static void test_bsrr_brr(const void *data) { /* * Test that writing a '1' in BSS and BSRR * has the desired effect on ODR. * In BSRR, BSx has priority over BRx. */ unsigned int pin = test_pin(data); uint32_t gpio = test_gpio_addr(data); gpio_writel(gpio, BSRR, (1 << pin)); g_assert_cmphex(gpio_readl(gpio, ODR), ==, reset(gpio, ODR) | (1 << pin)); gpio_writel(gpio, BSRR, (1 << (pin + NUM_GPIO_PINS))); g_assert_cmphex(gpio_readl(gpio, ODR), ==, reset(gpio, ODR)); gpio_writel(gpio, BSRR, (1 << pin)); g_assert_cmphex(gpio_readl(gpio, ODR), ==, reset(gpio, ODR) | (1 << pin)); gpio_writel(gpio, BRR, (1 << pin)); g_assert_cmphex(gpio_readl(gpio, ODR), ==, reset(gpio, ODR)); /* BSx should have priority over BRx */ gpio_writel(gpio, BSRR, (1 << pin) | (1 << (pin + NUM_GPIO_PINS))); g_assert_cmphex(gpio_readl(gpio, ODR), ==, reset(gpio, ODR) | (1 << pin)); gpio_writel(gpio, BRR, (1 << pin)); g_assert_cmphex(gpio_readl(gpio, ODR), ==, reset(gpio, ODR)); gpio_writel(gpio, ODR, reset(gpio, ODR)); } int main(int argc, char **argv) { int ret; g_test_init(&argc, &argv, NULL); g_test_set_nonfatal_assertions(); qtest_add_func("stm32l4x5/gpio/test_idr_reset_value", test_idr_reset_value); /* * The inputs for the tests (gpio and pin) can be changed, * but the tests don't work for pins that are high at reset * (GPIOA15, GPIO13 and GPIOB5). * Specifically, rising the pin then checking `get_irq()` * is problematic since the pin was already high. */ qtest_add_data_func("stm32l4x5/gpio/test_gpioc5_output_mode", test_data(GPIO_C, 5), test_gpio_output_mode); qtest_add_data_func("stm32l4x5/gpio/test_gpioh3_output_mode", test_data(GPIO_H, 3), test_gpio_output_mode); qtest_add_data_func("stm32l4x5/gpio/test_gpio_input_mode1", test_data(GPIO_D, 6), test_gpio_input_mode); qtest_add_data_func("stm32l4x5/gpio/test_gpio_input_mode2", test_data(GPIO_C, 10), test_gpio_input_mode); qtest_add_data_func("stm32l4x5/gpio/test_gpio_pull_up_pull_down1", test_data(GPIO_B, 5), test_pull_up_pull_down); qtest_add_data_func("stm32l4x5/gpio/test_gpio_pull_up_pull_down2", test_data(GPIO_F, 1), test_pull_up_pull_down); qtest_add_data_func("stm32l4x5/gpio/test_gpio_push_pull1", test_data(GPIO_G, 6), test_push_pull); qtest_add_data_func("stm32l4x5/gpio/test_gpio_push_pull2", test_data(GPIO_H, 3), test_push_pull); qtest_add_data_func("stm32l4x5/gpio/test_gpio_open_drain1", test_data(GPIO_C, 4), test_open_drain); qtest_add_data_func("stm32l4x5/gpio/test_gpio_open_drain2", test_data(GPIO_E, 11), test_open_drain); qtest_add_data_func("stm32l4x5/gpio/test_bsrr_brr1", test_data(GPIO_A, 12), test_bsrr_brr); qtest_add_data_func("stm32l4x5/gpio/test_bsrr_brr2", test_data(GPIO_D, 0), test_bsrr_brr); qtest_start("-machine b-l475e-iot01a"); ret = g_test_run(); qtest_end(); return ret; }