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qemu/hw/arm/stm32l4x5_soc.c
Inès Varhol b91b8fe79d hw/misc: Create STM32L4x5 SYSCFG clock 
This commit creates a clock in STM32L4x5 SYSCFG and wires it up to the
corresponding clock from STM32L4x5 RCC.

Signed-off-by: Inès Varhol <ines.varhol@telecom-paris.fr>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Luc Michel <luc@lmichel.fr>
Message-id: 20241003081105.40836-2-ines.varhol@telecom-paris.fr
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2024-10-15 11:29:45 +01:00

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/*
* STM32L4x5 SoC family
*
* Copyright (c) 2023-2024 Arnaud Minier <arnaud.minier@telecom-paris.fr>
* Copyright (c) 2023-2024 Inès Varhol <ines.varhol@telecom-paris.fr>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
* This work is heavily inspired by the stm32f405_soc by Alistair Francis.
* Original code is licensed under the MIT License:
*
* Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
*/
/*
* The reference used is the STMicroElectronics RM0351 Reference manual
* for STM32L4x5 and STM32L4x6 advanced Arm ® -based 32-bit MCUs.
* https://www.st.com/en/microcontrollers-microprocessors/stm32l4x5/documentation.html
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "qapi/error.h"
#include "exec/address-spaces.h"
#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"
#define FLASH_BASE_ADDRESS 0x08000000
#define SRAM1_BASE_ADDRESS 0x20000000
#define SRAM1_SIZE (96 * KiB)
#define SRAM2_BASE_ADDRESS 0x10000000
#define SRAM2_SIZE (32 * KiB)
#define EXTI_ADDR 0x40010400
#define SYSCFG_ADDR 0x40010000
#define NUM_EXTI_IRQ 40
/* Match exti line connections with their CPU IRQ number */
/* See Vector Table (Reference Manual p.396) */
/*
* Some IRQs are connected to the same CPU IRQ (denoted by -1)
* and require an intermediary OR gate to function correctly.
*/
static const int exti_irq[NUM_EXTI_IRQ] = {
6, /* GPIO[0] */
7, /* GPIO[1] */
8, /* GPIO[2] */
9, /* GPIO[3] */
10, /* GPIO[4] */
-1, -1, -1, -1, -1, /* GPIO[5..9] OR gate 23 */
-1, -1, -1, -1, -1, -1, /* GPIO[10..15] OR gate 40 */
-1, /* PVD OR gate 1 */
67, /* OTG_FS_WKUP, Direct */
41, /* RTC_ALARM */
2, /* RTC_TAMP_STAMP2/CSS_LSE */
3, /* RTC wakeup timer */
-1, -1, /* COMP[1..2] OR gate 63 */
31, /* I2C1 wakeup, Direct */
33, /* I2C2 wakeup, Direct */
72, /* I2C3 wakeup, Direct */
37, /* USART1 wakeup, Direct */
38, /* USART2 wakeup, Direct */
39, /* USART3 wakeup, Direct */
52, /* UART4 wakeup, Direct */
53, /* UART4 wakeup, Direct */
70, /* LPUART1 wakeup, Direct */
65, /* LPTIM1, Direct */
66, /* LPTIM2, Direct */
76, /* SWPMI1 wakeup, Direct */
-1, -1, -1, -1, /* PVM[1..4] OR gate 1 */
78 /* LCD wakeup, Direct */
};
#define RCC_BASE_ADDRESS 0x40021000
#define RCC_IRQ 5
#define EXTI_USART1_IRQ 26
#define EXTI_UART4_IRQ 29
#define EXTI_LPUART1_IRQ 31
static const int exti_or_gates_out[NUM_EXTI_OR_GATES] = {
23, 40, 63, 1,
};
static const int exti_or_gates_num_lines_in[NUM_EXTI_OR_GATES] = {
5, 6, 2, 5,
};
/* 3 OR gates with consecutive inputs */
#define NUM_EXTI_SIMPLE_OR_GATES 3
static const int exti_or_gates_first_line_in[NUM_EXTI_SIMPLE_OR_GATES] = {
5, 10, 21,
};
/* 1 OR gate with non-consecutive inputs */
#define EXTI_OR_GATE1_NUM_LINES_IN 5
static const int exti_or_gate1_lines_in[EXTI_OR_GATE1_NUM_LINES_IN] = {
16, 35, 36, 37, 38,
};
static const struct {
uint32_t addr;
uint32_t moder_reset;
uint32_t ospeedr_reset;
uint32_t pupdr_reset;
} stm32l4x5_gpio_cfg[NUM_GPIOS] = {
{ 0x48000000, 0xABFFFFFF, 0x0C000000, 0x64000000 },
{ 0x48000400, 0xFFFFFEBF, 0x00000000, 0x00000100 },
{ 0x48000800, 0xFFFFFFFF, 0x00000000, 0x00000000 },
{ 0x48000C00, 0xFFFFFFFF, 0x00000000, 0x00000000 },
{ 0x48001000, 0xFFFFFFFF, 0x00000000, 0x00000000 },
{ 0x48001400, 0xFFFFFFFF, 0x00000000, 0x00000000 },
{ 0x48001800, 0xFFFFFFFF, 0x00000000, 0x00000000 },
{ 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 void stm32l4x5_soc_initfn(Object *obj)
{
Stm32l4x5SocState *s = STM32L4X5_SOC(obj);
object_initialize_child(obj, "exti", &s->exti, TYPE_STM32L4X5_EXTI);
for (unsigned i = 0; i < NUM_EXTI_OR_GATES; i++) {
object_initialize_child(obj, "exti_or_gates[*]", &s->exti_or_gates[i],
TYPE_OR_IRQ);
}
object_initialize_child(obj, "syscfg", &s->syscfg, TYPE_STM32L4X5_SYSCFG);
object_initialize_child(obj, "rcc", &s->rcc, TYPE_STM32L4X5_RCC);
for (unsigned i = 0; i < NUM_GPIOS; i++) {
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)
{
ERRP_GUARD();
Stm32l4x5SocState *s = STM32L4X5_SOC(dev_soc);
const Stm32l4x5SocClass *sc = STM32L4X5_SOC_GET_CLASS(dev_soc);
MemoryRegion *system_memory = get_system_memory();
DeviceState *armv7m, *dev;
SysBusDevice *busdev;
uint32_t pin_index;
if (!memory_region_init_rom(&s->flash, OBJECT(dev_soc), "flash",
sc->flash_size, errp)) {
return;
}
memory_region_init_alias(&s->flash_alias, OBJECT(dev_soc),
"flash_boot_alias", &s->flash, 0,
sc->flash_size);
memory_region_add_subregion(system_memory, FLASH_BASE_ADDRESS, &s->flash);
memory_region_add_subregion(system_memory, 0, &s->flash_alias);
if (!memory_region_init_ram(&s->sram1, OBJECT(dev_soc), "SRAM1", SRAM1_SIZE,
errp)) {
return;
}
memory_region_add_subregion(system_memory, SRAM1_BASE_ADDRESS, &s->sram1);
if (!memory_region_init_ram(&s->sram2, OBJECT(dev_soc), "SRAM2", SRAM2_SIZE,
errp)) {
return;
}
memory_region_add_subregion(system_memory, SRAM2_BASE_ADDRESS, &s->sram2);
object_initialize_child(OBJECT(dev_soc), "armv7m", &s->armv7m, TYPE_ARMV7M);
armv7m = DEVICE(&s->armv7m);
qdev_prop_set_uint32(armv7m, "num-irq", 96);
qdev_prop_set_uint32(armv7m, "num-prio-bits", 4);
qdev_prop_set_string(armv7m, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m4"));
qdev_prop_set_bit(armv7m, "enable-bitband", true);
qdev_connect_clock_in(armv7m, "cpuclk",
qdev_get_clock_out(DEVICE(&(s->rcc)), "cortex-fclk-out"));
qdev_connect_clock_in(armv7m, "refclk",
qdev_get_clock_out(DEVICE(&(s->rcc)), "cortex-refclk-out"));
object_property_set_link(OBJECT(&s->armv7m), "memory",
OBJECT(system_memory), &error_abort);
if (!sysbus_realize(SYS_BUS_DEVICE(&s->armv7m), errp)) {
return;
}
/* GPIOs */
for (unsigned i = 0; i < NUM_GPIOS; i++) {
g_autofree char *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",
stm32l4x5_gpio_cfg[i].moder_reset);
qdev_prop_set_uint32(dev, "ospeed-reset",
stm32l4x5_gpio_cfg[i].ospeedr_reset);
qdev_prop_set_uint32(dev, "pupd-reset",
stm32l4x5_gpio_cfg[i].pupdr_reset);
busdev = SYS_BUS_DEVICE(&s->gpio[i]);
g_free(name);
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));
if (!sysbus_realize(busdev, errp)) {
return;
}
sysbus_mmio_map(busdev, 0, stm32l4x5_gpio_cfg[i].addr);
}
/* System configuration controller */
busdev = SYS_BUS_DEVICE(&s->syscfg);
qdev_connect_clock_in(DEVICE(&s->syscfg), "clk",
qdev_get_clock_out(DEVICE(&(s->rcc)), "syscfg-out"));
if (!sysbus_realize(busdev, errp)) {
return;
}
sysbus_mmio_map(busdev, 0, SYSCFG_ADDR);
for (unsigned i = 0; i < NUM_GPIOS; i++) {
for (unsigned j = 0; j < GPIO_NUM_PINS; j++) {
pin_index = GPIO_NUM_PINS * i + j;
qdev_connect_gpio_out(DEVICE(&s->gpio[i]), j,
qdev_get_gpio_in(DEVICE(&s->syscfg),
pin_index));
}
}
qdev_pass_gpios(DEVICE(&s->syscfg), dev_soc, NULL);
/* EXTI device */
busdev = SYS_BUS_DEVICE(&s->exti);
if (!sysbus_realize(busdev, errp)) {
return;
}
sysbus_mmio_map(busdev, 0, EXTI_ADDR);
/* IRQs with fan-in that require an OR gate */
for (unsigned i = 0; i < NUM_EXTI_OR_GATES; i++) {
if (!object_property_set_int(OBJECT(&s->exti_or_gates[i]), "num-lines",
exti_or_gates_num_lines_in[i], errp)) {
return;
}
if (!qdev_realize(DEVICE(&s->exti_or_gates[i]), NULL, errp)) {
return;
}
qdev_connect_gpio_out(DEVICE(&s->exti_or_gates[i]), 0,
qdev_get_gpio_in(armv7m, exti_or_gates_out[i]));
if (i < NUM_EXTI_SIMPLE_OR_GATES) {
/* consecutive inputs for OR gates 23, 40, 63 */
for (unsigned j = 0; j < exti_or_gates_num_lines_in[i]; j++) {
sysbus_connect_irq(SYS_BUS_DEVICE(&s->exti),
exti_or_gates_first_line_in[i] + j,
qdev_get_gpio_in(DEVICE(&s->exti_or_gates[i]), j));
}
} else {
/* non-consecutive inputs for OR gate 1 */
for (unsigned j = 0; j < EXTI_OR_GATE1_NUM_LINES_IN; j++) {
sysbus_connect_irq(SYS_BUS_DEVICE(&s->exti),
exti_or_gate1_lines_in[j],
qdev_get_gpio_in(DEVICE(&s->exti_or_gates[i]), j));
}
}
}
/* IRQs that don't require fan-in */
for (unsigned i = 0; i < NUM_EXTI_IRQ; i++) {
if (exti_irq[i] != -1) {
sysbus_connect_irq(busdev, i,
qdev_get_gpio_in(armv7m, exti_irq[i]));
}
}
/* Connect SYSCFG to EXTI */
for (unsigned i = 0; i < GPIO_NUM_PINS; i++) {
qdev_connect_gpio_out(DEVICE(&s->syscfg), i,
qdev_get_gpio_in(DEVICE(&s->exti), i));
}
/* RCC device */
busdev = SYS_BUS_DEVICE(&s->rcc);
if (!sysbus_realize(busdev, errp)) {
return;
}
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++) {
g_autofree char *name = g_strdup_printf("usart%d-out", i + 1);
dev = DEVICE(&(s->usart[i]));
qdev_prop_set_chr(dev, "chardev", serial_hd(i));
qdev_connect_clock_in(dev, "clk",
qdev_get_clock_out(DEVICE(&(s->rcc)), 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(DEVICE(&s->exti),
EXTI_USART1_IRQ + i));
}
/* UART devices */
for (int i = 0; i < STM_NUM_UARTS; i++) {
g_autofree char *name = g_strdup_printf("uart%d-out", STM_NUM_USARTS + i + 1);
dev = DEVICE(&(s->uart[i]));
qdev_prop_set_chr(dev, "chardev", serial_hd(STM_NUM_USARTS + i));
qdev_connect_clock_in(dev, "clk",
qdev_get_clock_out(DEVICE(&(s->rcc)), 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(DEVICE(&s->exti),
EXTI_UART4_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(DEVICE(&s->exti),
EXTI_LPUART1_IRQ));
/* APB1 BUS */
create_unimplemented_device("TIM2", 0x40000000, 0x400);
create_unimplemented_device("TIM3", 0x40000400, 0x400);
create_unimplemented_device("TIM4", 0x40000800, 0x400);
create_unimplemented_device("TIM5", 0x40000C00, 0x400);
create_unimplemented_device("TIM6", 0x40001000, 0x400);
create_unimplemented_device("TIM7", 0x40001400, 0x400);
/* RESERVED: 0x40001800, 0x1000 */
create_unimplemented_device("RTC", 0x40002800, 0x400);
create_unimplemented_device("WWDG", 0x40002C00, 0x400);
create_unimplemented_device("IWDG", 0x40003000, 0x400);
/* RESERVED: 0x40001800, 0x400 */
create_unimplemented_device("SPI2", 0x40003800, 0x400);
create_unimplemented_device("SPI3", 0x40003C00, 0x400);
/* RESERVED: 0x40004000, 0x400 */
create_unimplemented_device("I2C1", 0x40005400, 0x400);
create_unimplemented_device("I2C2", 0x40005800, 0x400);
create_unimplemented_device("I2C3", 0x40005C00, 0x400);
/* RESERVED: 0x40006000, 0x400 */
create_unimplemented_device("CAN1", 0x40006400, 0x400);
/* RESERVED: 0x40006800, 0x400 */
create_unimplemented_device("PWR", 0x40007000, 0x400);
create_unimplemented_device("DAC1", 0x40007400, 0x400);
create_unimplemented_device("OPAMP", 0x40007800, 0x400);
create_unimplemented_device("LPTIM1", 0x40007C00, 0x400);
/* RESERVED: 0x40008400, 0x400 */
create_unimplemented_device("SWPMI1", 0x40008800, 0x400);
/* RESERVED: 0x40008C00, 0x800 */
create_unimplemented_device("LPTIM2", 0x40009400, 0x400);
/* RESERVED: 0x40009800, 0x6800 */
/* APB2 BUS */
create_unimplemented_device("VREFBUF", 0x40010030, 0x1D0);
create_unimplemented_device("COMP", 0x40010200, 0x200);
/* RESERVED: 0x40010800, 0x1400 */
create_unimplemented_device("FIREWALL", 0x40011C00, 0x400);
/* RESERVED: 0x40012000, 0x800 */
create_unimplemented_device("SDMMC1", 0x40012800, 0x400);
create_unimplemented_device("TIM1", 0x40012C00, 0x400);
create_unimplemented_device("SPI1", 0x40013000, 0x400);
create_unimplemented_device("TIM8", 0x40013400, 0x400);
/* RESERVED: 0x40013C00, 0x400 */
create_unimplemented_device("TIM15", 0x40014000, 0x400);
create_unimplemented_device("TIM16", 0x40014400, 0x400);
create_unimplemented_device("TIM17", 0x40014800, 0x400);
/* RESERVED: 0x40014C00, 0x800 */
create_unimplemented_device("SAI1", 0x40015400, 0x400);
create_unimplemented_device("SAI2", 0x40015800, 0x400);
/* RESERVED: 0x40015C00, 0x400 */
create_unimplemented_device("DFSDM1", 0x40016000, 0x400);
/* RESERVED: 0x40016400, 0x9C00 */
/* AHB1 BUS */
create_unimplemented_device("DMA1", 0x40020000, 0x400);
create_unimplemented_device("DMA2", 0x40020400, 0x400);
/* RESERVED: 0x40020800, 0x800 */
/* RESERVED: 0x40021400, 0xC00 */
create_unimplemented_device("FLASH", 0x40022000, 0x400);
/* RESERVED: 0x40022400, 0xC00 */
create_unimplemented_device("CRC", 0x40023000, 0x400);
/* RESERVED: 0x40023400, 0x400 */
create_unimplemented_device("TSC", 0x40024000, 0x400);
/* RESERVED: 0x40024400, 0x7FDBC00 */
/* AHB2 BUS */
/* RESERVED: 0x48002000, 0x7FDBC00 */
create_unimplemented_device("OTG_FS", 0x50000000, 0x40000);
create_unimplemented_device("ADC", 0x50040000, 0x400);
/* RESERVED: 0x50040400, 0x20400 */
create_unimplemented_device("RNG", 0x50060800, 0x400);
/* AHB3 BUS */
create_unimplemented_device("FMC", 0xA0000000, 0x1000);
create_unimplemented_device("QUADSPI", 0xA0001000, 0x400);
}
static void stm32l4x5_soc_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = stm32l4x5_soc_realize;
/* Reason: Mapped at fixed location on the system bus */
dc->user_creatable = false;
/* No vmstate or reset required: device has no internal state */
}
static void stm32l4x5xc_soc_class_init(ObjectClass *oc, void *data)
{
Stm32l4x5SocClass *ssc = STM32L4X5_SOC_CLASS(oc);
ssc->flash_size = 256 * KiB;
}
static void stm32l4x5xe_soc_class_init(ObjectClass *oc, void *data)
{
Stm32l4x5SocClass *ssc = STM32L4X5_SOC_CLASS(oc);
ssc->flash_size = 512 * KiB;
}
static void stm32l4x5xg_soc_class_init(ObjectClass *oc, void *data)
{
Stm32l4x5SocClass *ssc = STM32L4X5_SOC_CLASS(oc);
ssc->flash_size = 1 * MiB;
}
static const TypeInfo stm32l4x5_soc_types[] = {
{
.name = TYPE_STM32L4X5XC_SOC,
.parent = TYPE_STM32L4X5_SOC,
.class_init = stm32l4x5xc_soc_class_init,
}, {
.name = TYPE_STM32L4X5XE_SOC,
.parent = TYPE_STM32L4X5_SOC,
.class_init = stm32l4x5xe_soc_class_init,
}, {
.name = TYPE_STM32L4X5XG_SOC,
.parent = TYPE_STM32L4X5_SOC,
.class_init = stm32l4x5xg_soc_class_init,
}, {
.name = TYPE_STM32L4X5_SOC,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(Stm32l4x5SocState),
.instance_init = stm32l4x5_soc_initfn,
.class_size = sizeof(Stm32l4x5SocClass),
.class_init = stm32l4x5_soc_class_init,
.abstract = true,
}
};
DEFINE_TYPES(stm32l4x5_soc_types)
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