@@ -19,13 +19,13 @@ Currently B-L475E-IOT01A machine's only supports the following devices:
- STM32L4x5 SYSCFG (System configuration controller)
- STM32L4x5 RCC (Reset and clock control)
- STM32L4x5 GPIOs (General-purpose I/Os)
+- STM32L4x5 USARTs, UARTs and LPUART (Serial ports)
Missing devices
"""""""""""""""
The B-L475E-IOT01A does *not* support the following devices:
-- Serial ports (UART)
- Analog to Digital Converter (ADC)
- SPI controller
- Timer controller (TIMER)
@@ -477,6 +477,7 @@ config STM32L4X5_SOC
select STM32L4X5_SYSCFG
select STM32L4X5_RCC
select STM32L4X5_GPIO
+ select STM32L4X5_USART
config XLNX_ZYNQMP_ARM
bool
@@ -28,6 +28,7 @@
#include "sysemu/sysemu.h"
#include "hw/or-irq.h"
#include "hw/arm/stm32l4x5_soc.h"
+#include "hw/char/stm32l4x5_usart.h"
#include "hw/gpio/stm32l4x5_gpio.h"
#include "hw/qdev-clock.h"
#include "hw/misc/unimp.h"
@@ -116,6 +117,22 @@ static const struct {
{ 0x48001C00, 0x0000000F, 0x00000000, 0x00000000 },
};
+static const hwaddr usart_addr[] = {
+ 0x40013800, /* "USART1", 0x400 */
+ 0x40004400, /* "USART2", 0x400 */
+ 0x40004800, /* "USART3", 0x400 */
+};
+static const hwaddr uart_addr[] = {
+ 0x40004C00, /* "UART4" , 0x400 */
+ 0x40005000 /* "UART5" , 0x400 */
+};
+
+#define LPUART_BASE_ADDRESS 0x40008000
+
+static const int usart_irq[] = { 37, 38, 39 };
+static const int uart_irq[] = { 52, 53 };
+#define LPUART_IRQ 70
+
static void stm32l4x5_soc_initfn(Object *obj)
{
Stm32l4x5SocState *s = STM32L4X5_SOC(obj);
@@ -132,6 +149,18 @@ static void stm32l4x5_soc_initfn(Object *obj)
g_autofree char *name = g_strdup_printf("gpio%c", 'a' + i);
object_initialize_child(obj, name, &s->gpio[i], TYPE_STM32L4X5_GPIO);
}
+
+ for (int i = 0; i < STM_NUM_USARTS; i++) {
+ object_initialize_child(obj, "usart[*]", &s->usart[i],
+ TYPE_STM32L4X5_USART);
+ }
+
+ for (int i = 0; i < STM_NUM_UARTS; i++) {
+ object_initialize_child(obj, "uart[*]", &s->uart[i],
+ TYPE_STM32L4X5_UART);
+ }
+ object_initialize_child(obj, "lpuart1", &s->lpuart,
+ TYPE_STM32L4X5_LPUART);
}
static void stm32l4x5_soc_realize(DeviceState *dev_soc, Error **errp)
@@ -143,6 +172,7 @@ static void stm32l4x5_soc_realize(DeviceState *dev_soc, Error **errp)
DeviceState *armv7m, *dev;
SysBusDevice *busdev;
uint32_t pin_index;
+ g_autofree char *name;
if (!memory_region_init_rom(&s->flash, OBJECT(dev_soc), "flash",
sc->flash_size, errp)) {
@@ -185,7 +215,7 @@ static void stm32l4x5_soc_realize(DeviceState *dev_soc, Error **errp)
/* GPIOs */
for (unsigned i = 0; i < NUM_GPIOS; i++) {
- g_autofree char *name = g_strdup_printf("%c", 'A' + i);
+ name = g_strdup_printf("%c", 'A' + i);
dev = DEVICE(&s->gpio[i]);
qdev_prop_set_string(dev, "name", name);
qdev_prop_set_uint32(dev, "mode-reset",
@@ -199,6 +229,7 @@ static void stm32l4x5_soc_realize(DeviceState *dev_soc, Error **errp)
name = g_strdup_printf("gpio%c-out", 'a' + i);
qdev_connect_clock_in(DEVICE(&s->gpio[i]), "clk",
qdev_get_clock_out(DEVICE(&(s->rcc)), name));
+ g_free(name);
if (!sysbus_realize(busdev, errp)) {
return;
}
@@ -279,6 +310,55 @@ static void stm32l4x5_soc_realize(DeviceState *dev_soc, Error **errp)
sysbus_mmio_map(busdev, 0, RCC_BASE_ADDRESS);
sysbus_connect_irq(busdev, 0, qdev_get_gpio_in(armv7m, RCC_IRQ));
+ /* USART devices */
+ for (int i = 0; i < STM_NUM_USARTS; i++) {
+ dev = DEVICE(&(s->usart[i]));
+ qdev_prop_set_chr(dev, "chardev", serial_hd(i));
+ name = g_strdup_printf("usart%d-out", i + 1);
+ qdev_connect_clock_in(dev, "clk",
+ qdev_get_clock_out(DEVICE(&(s->rcc)), name));
+ g_free(name);
+ busdev = SYS_BUS_DEVICE(dev);
+ if (!sysbus_realize(busdev, errp)) {
+ return;
+ }
+ sysbus_mmio_map(busdev, 0, usart_addr[i]);
+ sysbus_connect_irq(busdev, 0, qdev_get_gpio_in(armv7m, usart_irq[i]));
+ }
+
+ /*
+ * TODO: Connect the USARTs, UARTs and LPUART to the EXTI once the EXTI
+ * can handle other gpio-in than the gpios. (e.g. Direct Lines for the usarts)
+ */
+
+ /* UART devices */
+ for (int i = 0; i < STM_NUM_UARTS; i++) {
+ dev = DEVICE(&(s->uart[i]));
+ qdev_prop_set_chr(dev, "chardev", serial_hd(STM_NUM_USARTS + i));
+ name = g_strdup_printf("uart%d-out", STM_NUM_USARTS + i + 1);
+ qdev_connect_clock_in(dev, "clk",
+ qdev_get_clock_out(DEVICE(&(s->rcc)), name));
+ g_free(name);
+ busdev = SYS_BUS_DEVICE(dev);
+ if (!sysbus_realize(busdev, errp)) {
+ return;
+ }
+ sysbus_mmio_map(busdev, 0, uart_addr[i]);
+ sysbus_connect_irq(busdev, 0, qdev_get_gpio_in(armv7m, uart_irq[i]));
+ }
+
+ /* LPUART device*/
+ dev = DEVICE(&(s->lpuart));
+ qdev_prop_set_chr(dev, "chardev", serial_hd(STM_NUM_USARTS + STM_NUM_UARTS));
+ qdev_connect_clock_in(dev, "clk",
+ qdev_get_clock_out(DEVICE(&(s->rcc)), "lpuart1-out"));
+ busdev = SYS_BUS_DEVICE(dev);
+ if (!sysbus_realize(busdev, errp)) {
+ return;
+ }
+ sysbus_mmio_map(busdev, 0, LPUART_BASE_ADDRESS);
+ sysbus_connect_irq(busdev, 0, qdev_get_gpio_in(armv7m, LPUART_IRQ));
+
/* APB1 BUS */
create_unimplemented_device("TIM2", 0x40000000, 0x400);
create_unimplemented_device("TIM3", 0x40000400, 0x400);
@@ -294,10 +374,6 @@ static void stm32l4x5_soc_realize(DeviceState *dev_soc, Error **errp)
create_unimplemented_device("SPI2", 0x40003800, 0x400);
create_unimplemented_device("SPI3", 0x40003C00, 0x400);
/* RESERVED: 0x40004000, 0x400 */
- create_unimplemented_device("USART2", 0x40004400, 0x400);
- create_unimplemented_device("USART3", 0x40004800, 0x400);
- create_unimplemented_device("UART4", 0x40004C00, 0x400);
- create_unimplemented_device("UART5", 0x40005000, 0x400);
create_unimplemented_device("I2C1", 0x40005400, 0x400);
create_unimplemented_device("I2C2", 0x40005800, 0x400);
create_unimplemented_device("I2C3", 0x40005C00, 0x400);
@@ -308,7 +384,6 @@ static void stm32l4x5_soc_realize(DeviceState *dev_soc, Error **errp)
create_unimplemented_device("DAC1", 0x40007400, 0x400);
create_unimplemented_device("OPAMP", 0x40007800, 0x400);
create_unimplemented_device("LPTIM1", 0x40007C00, 0x400);
- create_unimplemented_device("LPUART1", 0x40008000, 0x400);
/* RESERVED: 0x40008400, 0x400 */
create_unimplemented_device("SWPMI1", 0x40008800, 0x400);
/* RESERVED: 0x40008C00, 0x800 */
@@ -325,7 +400,6 @@ static void stm32l4x5_soc_realize(DeviceState *dev_soc, Error **errp)
create_unimplemented_device("TIM1", 0x40012C00, 0x400);
create_unimplemented_device("SPI1", 0x40013000, 0x400);
create_unimplemented_device("TIM8", 0x40013400, 0x400);
- create_unimplemented_device("USART1", 0x40013800, 0x400);
/* RESERVED: 0x40013C00, 0x400 */
create_unimplemented_device("TIM15", 0x40014000, 0x400);
create_unimplemented_device("TIM16", 0x40014400, 0x400);
@@ -21,6 +21,12 @@
* https://www.st.com/en/microcontrollers-microprocessors/stm32l4x5/documentation.html
*/
+/*
+ * The STM32L4X5 is heavily inspired by the stm32f405 by Alistair Francis.
+ * The reference used is the STMicroElectronics RM0351 Reference manual
+ * for STM32L4x5 and STM32L4x6 advanced Arm ® -based 32-bit MCUs.
+ */
+
#ifndef HW_ARM_STM32L4x5_SOC_H
#define HW_ARM_STM32L4x5_SOC_H
@@ -31,6 +37,7 @@
#include "hw/misc/stm32l4x5_exti.h"
#include "hw/misc/stm32l4x5_rcc.h"
#include "hw/gpio/stm32l4x5_gpio.h"
+#include "hw/char/stm32l4x5_usart.h"
#include "qom/object.h"
#define TYPE_STM32L4X5_SOC "stm32l4x5-soc"
@@ -41,6 +48,9 @@ OBJECT_DECLARE_TYPE(Stm32l4x5SocState, Stm32l4x5SocClass, STM32L4X5_SOC)
#define NUM_EXTI_OR_GATES 4
+#define STM_NUM_USARTS 3
+#define STM_NUM_UARTS 2
+
struct Stm32l4x5SocState {
SysBusDevice parent_obj;
@@ -51,6 +61,9 @@ struct Stm32l4x5SocState {
Stm32l4x5SyscfgState syscfg;
Stm32l4x5RccState rcc;
Stm32l4x5GpioState gpio[NUM_GPIOS];
+ Stm32l4x5UsartBaseState usart[STM_NUM_USARTS];
+ Stm32l4x5UsartBaseState uart[STM_NUM_UARTS];
+ Stm32l4x5UsartBaseState lpuart;
MemoryRegion sram1;
MemoryRegion sram2;