blob: cc56be2031f7a5e0c501db02e7484ad70e54573c [file] [log] [blame]
/*
* QTest testcase for STM32L4x5_GPIO
*
* Copyright (c) 2024 Arnaud Minier <arnaud.minier@telecom-paris.fr>
* Copyright (c) 2024 Inès Varhol <ines.varhol@telecom-paris.fr>
*
* 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
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
};
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 = ((uint64_t)data) & 0xF;
uint32_t gpio = ((uint64_t)data) >> 32;
unsigned int gpio_id = get_gpio_id(gpio);
qtest_irq_intercept_in(global_qtest, "/machine/soc/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 = ((uint64_t)data) & 0xF;
uint32_t gpio = ((uint64_t)data) >> 32;
unsigned int gpio_id = get_gpio_id(gpio);
qtest_irq_intercept_in(global_qtest, "/machine/soc/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 = ((uint64_t)data) & 0xF;
uint32_t gpio = ((uint64_t)data) >> 32;
unsigned int gpio_id = get_gpio_id(gpio);
qtest_irq_intercept_in(global_qtest, "/machine/soc/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 = ((uint64_t)data) & 0xF;
uint32_t gpio = ((uint64_t)data) >> 32;
uint32_t gpio2 = GPIO_BASE_ADDR + (GPIO_H - gpio);
qtest_irq_intercept_in(global_qtest, "/machine/soc/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 = ((uint64_t)data) & 0xF;
uint32_t gpio = ((uint64_t)data) >> 32;
uint32_t gpio2 = GPIO_BASE_ADDR + (GPIO_H - gpio);
qtest_irq_intercept_in(global_qtest, "/machine/soc/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 = ((uint64_t)data) & 0xF;
uint32_t gpio = ((uint64_t)data) >> 32;
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",
(void *)((uint64_t)GPIO_C << 32 | 5),
test_gpio_output_mode);
qtest_add_data_func("stm32l4x5/gpio/test_gpioh3_output_mode",
(void *)((uint64_t)GPIO_H << 32 | 3),
test_gpio_output_mode);
qtest_add_data_func("stm32l4x5/gpio/test_gpio_input_mode1",
(void *)((uint64_t)GPIO_D << 32 | 6),
test_gpio_input_mode);
qtest_add_data_func("stm32l4x5/gpio/test_gpio_input_mode2",
(void *)((uint64_t)GPIO_C << 32 | 10),
test_gpio_input_mode);
qtest_add_data_func("stm32l4x5/gpio/test_gpio_pull_up_pull_down1",
(void *)((uint64_t)GPIO_B << 32 | 5),
test_pull_up_pull_down);
qtest_add_data_func("stm32l4x5/gpio/test_gpio_pull_up_pull_down2",
(void *)((uint64_t)GPIO_F << 32 | 1),
test_pull_up_pull_down);
qtest_add_data_func("stm32l4x5/gpio/test_gpio_push_pull1",
(void *)((uint64_t)GPIO_G << 32 | 6),
test_push_pull);
qtest_add_data_func("stm32l4x5/gpio/test_gpio_push_pull2",
(void *)((uint64_t)GPIO_H << 32 | 3),
test_push_pull);
qtest_add_data_func("stm32l4x5/gpio/test_gpio_open_drain1",
(void *)((uint64_t)GPIO_C << 32 | 4),
test_open_drain);
qtest_add_data_func("stm32l4x5/gpio/test_gpio_open_drain2",
(void *)((uint64_t)GPIO_E << 32 | 11),
test_open_drain);
qtest_add_data_func("stm32l4x5/gpio/test_bsrr_brr1",
(void *)((uint64_t)GPIO_A << 32 | 12),
test_bsrr_brr);
qtest_add_data_func("stm32l4x5/gpio/test_bsrr_brr2",
(void *)((uint64_t)GPIO_D << 32 | 0),
test_bsrr_brr);
qtest_start("-machine b-l475e-iot01a");
ret = g_test_run();
qtest_end();
return ret;
}