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xemu/hw/arm/stm32f405_soc.c
Peter Maydell 66e6a43818 hw/arm/stm32f405: Wire up sysclk and refclk 
Wire up the sysclk and refclk for the stm32f405 SoC.  This SoC always
runs the systick refclk at 1/8 the frequency of the main CPU clock,
so the board code only needs to provide a single sysclk clock.

Because there is only one board using this SoC, we convert the SoC
and the board together, rather than splitting it into "add clock to
SoC; connect clock in board; add error check in SoC code that clock
is wired up".

When the systick device starts honouring its clock inputs, this will
fix an emulation inaccuracy in the netduinoplus2 board where the
systick reference clock was running at 1MHz rather than 21MHz.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Alexandre Iooss <erdnaxe@crans.org>
Reviewed-by: Luc Michel <luc@lmichel.fr>
Message-id: 20210812093356.1946-14-peter.maydell@linaro.org
2021-09-01 11:08:19 +01:00

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/*
* STM32F405 SoC
*
* Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "exec/address-spaces.h"
#include "sysemu/sysemu.h"
#include "hw/arm/stm32f405_soc.h"
#include "hw/qdev-clock.h"
#include "hw/misc/unimp.h"
#define SYSCFG_ADD 0x40013800
static const uint32_t usart_addr[] = { 0x40011000, 0x40004400, 0x40004800,
0x40004C00, 0x40005000, 0x40011400,
0x40007800, 0x40007C00 };
/* At the moment only Timer 2 to 5 are modelled */
static const uint32_t timer_addr[] = { 0x40000000, 0x40000400,
0x40000800, 0x40000C00 };
static const uint32_t adc_addr[] = { 0x40012000, 0x40012100, 0x40012200,
0x40012300, 0x40012400, 0x40012500 };
static const uint32_t spi_addr[] = { 0x40013000, 0x40003800, 0x40003C00,
0x40013400, 0x40015000, 0x40015400 };
#define EXTI_ADDR 0x40013C00
#define SYSCFG_IRQ 71
static const int usart_irq[] = { 37, 38, 39, 52, 53, 71, 82, 83 };
static const int timer_irq[] = { 28, 29, 30, 50 };
#define ADC_IRQ 18
static const int spi_irq[] = { 35, 36, 51, 0, 0, 0 };
static const int exti_irq[] = { 6, 7, 8, 9, 10, 23, 23, 23, 23, 23, 40,
40, 40, 40, 40, 40} ;
static void stm32f405_soc_initfn(Object *obj)
{
STM32F405State *s = STM32F405_SOC(obj);
int i;
object_initialize_child(obj, "armv7m", &s->armv7m, TYPE_ARMV7M);
object_initialize_child(obj, "syscfg", &s->syscfg, TYPE_STM32F4XX_SYSCFG);
for (i = 0; i < STM_NUM_USARTS; i++) {
object_initialize_child(obj, "usart[*]", &s->usart[i],
TYPE_STM32F2XX_USART);
}
for (i = 0; i < STM_NUM_TIMERS; i++) {
object_initialize_child(obj, "timer[*]", &s->timer[i],
TYPE_STM32F2XX_TIMER);
}
for (i = 0; i < STM_NUM_ADCS; i++) {
object_initialize_child(obj, "adc[*]", &s->adc[i], TYPE_STM32F2XX_ADC);
}
for (i = 0; i < STM_NUM_SPIS; i++) {
object_initialize_child(obj, "spi[*]", &s->spi[i], TYPE_STM32F2XX_SPI);
}
object_initialize_child(obj, "exti", &s->exti, TYPE_STM32F4XX_EXTI);
s->sysclk = qdev_init_clock_in(DEVICE(s), "sysclk", NULL, NULL, 0);
s->refclk = qdev_init_clock_in(DEVICE(s), "refclk", NULL, NULL, 0);
}
static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
{
STM32F405State *s = STM32F405_SOC(dev_soc);
MemoryRegion *system_memory = get_system_memory();
DeviceState *dev, *armv7m;
SysBusDevice *busdev;
Error *err = NULL;
int i;
/*
* We use s->refclk internally and only define it with qdev_init_clock_in()
* so it is correctly parented and not leaked on an init/deinit; it is not
* intended as an externally exposed clock.
*/
if (clock_has_source(s->refclk)) {
error_setg(errp, "refclk clock must not be wired up by the board code");
return;
}
if (!clock_has_source(s->sysclk)) {
error_setg(errp, "sysclk clock must be wired up by the board code");
return;
}
/*
* TODO: ideally we should model the SoC RCC and its ability to
* change the sysclk frequency and define different sysclk sources.
*/
/* The refclk always runs at frequency HCLK / 8 */
clock_set_mul_div(s->refclk, 8, 1);
clock_set_source(s->refclk, s->sysclk);
memory_region_init_rom(&s->flash, OBJECT(dev_soc), "STM32F405.flash",
FLASH_SIZE, &err);
if (err != NULL) {
error_propagate(errp, err);
return;
}
memory_region_init_alias(&s->flash_alias, OBJECT(dev_soc),
"STM32F405.flash.alias", &s->flash, 0,
FLASH_SIZE);
memory_region_add_subregion(system_memory, FLASH_BASE_ADDRESS, &s->flash);
memory_region_add_subregion(system_memory, 0, &s->flash_alias);
memory_region_init_ram(&s->sram, NULL, "STM32F405.sram", SRAM_SIZE,
&err);
if (err != NULL) {
error_propagate(errp, err);
return;
}
memory_region_add_subregion(system_memory, SRAM_BASE_ADDRESS, &s->sram);
armv7m = DEVICE(&s->armv7m);
qdev_prop_set_uint32(armv7m, "num-irq", 96);
qdev_prop_set_string(armv7m, "cpu-type", s->cpu_type);
qdev_prop_set_bit(armv7m, "enable-bitband", true);
qdev_connect_clock_in(armv7m, "cpuclk", s->sysclk);
qdev_connect_clock_in(armv7m, "refclk", s->refclk);
object_property_set_link(OBJECT(&s->armv7m), "memory",
OBJECT(system_memory), &error_abort);
if (!sysbus_realize(SYS_BUS_DEVICE(&s->armv7m), errp)) {
return;
}
/* System configuration controller */
dev = DEVICE(&s->syscfg);
if (!sysbus_realize(SYS_BUS_DEVICE(&s->syscfg), errp)) {
return;
}
busdev = SYS_BUS_DEVICE(dev);
sysbus_mmio_map(busdev, 0, SYSCFG_ADD);
sysbus_connect_irq(busdev, 0, qdev_get_gpio_in(armv7m, SYSCFG_IRQ));
/* Attach UART (uses USART registers) and USART controllers */
for (i = 0; i < STM_NUM_USARTS; i++) {
dev = DEVICE(&(s->usart[i]));
qdev_prop_set_chr(dev, "chardev", serial_hd(i));
if (!sysbus_realize(SYS_BUS_DEVICE(&s->usart[i]), errp)) {
return;
}
busdev = SYS_BUS_DEVICE(dev);
sysbus_mmio_map(busdev, 0, usart_addr[i]);
sysbus_connect_irq(busdev, 0, qdev_get_gpio_in(armv7m, usart_irq[i]));
}
/* Timer 2 to 5 */
for (i = 0; i < STM_NUM_TIMERS; i++) {
dev = DEVICE(&(s->timer[i]));
qdev_prop_set_uint64(dev, "clock-frequency", 1000000000);
if (!sysbus_realize(SYS_BUS_DEVICE(&s->timer[i]), errp)) {
return;
}
busdev = SYS_BUS_DEVICE(dev);
sysbus_mmio_map(busdev, 0, timer_addr[i]);
sysbus_connect_irq(busdev, 0, qdev_get_gpio_in(armv7m, timer_irq[i]));
}
/* ADC device, the IRQs are ORed together */
if (!object_initialize_child_with_props(OBJECT(s), "adc-orirq",
&s->adc_irqs, sizeof(s->adc_irqs),
TYPE_OR_IRQ, errp, NULL)) {
return;
}
object_property_set_int(OBJECT(&s->adc_irqs), "num-lines", STM_NUM_ADCS,
&error_abort);
if (!qdev_realize(DEVICE(&s->adc_irqs), NULL, errp)) {
return;
}
qdev_connect_gpio_out(DEVICE(&s->adc_irqs), 0,
qdev_get_gpio_in(armv7m, ADC_IRQ));
for (i = 0; i < STM_NUM_ADCS; i++) {
dev = DEVICE(&(s->adc[i]));
if (!sysbus_realize(SYS_BUS_DEVICE(&s->adc[i]), errp)) {
return;
}
busdev = SYS_BUS_DEVICE(dev);
sysbus_mmio_map(busdev, 0, adc_addr[i]);
sysbus_connect_irq(busdev, 0,
qdev_get_gpio_in(DEVICE(&s->adc_irqs), i));
}
/* SPI devices */
for (i = 0; i < STM_NUM_SPIS; i++) {
dev = DEVICE(&(s->spi[i]));
if (!sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), errp)) {
return;
}
busdev = SYS_BUS_DEVICE(dev);
sysbus_mmio_map(busdev, 0, spi_addr[i]);
sysbus_connect_irq(busdev, 0, qdev_get_gpio_in(armv7m, spi_irq[i]));
}
/* EXTI device */
dev = DEVICE(&s->exti);
if (!sysbus_realize(SYS_BUS_DEVICE(&s->exti), errp)) {
return;
}
busdev = SYS_BUS_DEVICE(dev);
sysbus_mmio_map(busdev, 0, EXTI_ADDR);
for (i = 0; i < 16; i++) {
sysbus_connect_irq(busdev, i, qdev_get_gpio_in(armv7m, exti_irq[i]));
}
for (i = 0; i < 16; i++) {
qdev_connect_gpio_out(DEVICE(&s->syscfg), i, qdev_get_gpio_in(dev, i));
}
create_unimplemented_device("timer[7]", 0x40001400, 0x400);
create_unimplemented_device("timer[12]", 0x40001800, 0x400);
create_unimplemented_device("timer[6]", 0x40001000, 0x400);
create_unimplemented_device("timer[13]", 0x40001C00, 0x400);
create_unimplemented_device("timer[14]", 0x40002000, 0x400);
create_unimplemented_device("RTC and BKP", 0x40002800, 0x400);
create_unimplemented_device("WWDG", 0x40002C00, 0x400);
create_unimplemented_device("IWDG", 0x40003000, 0x400);
create_unimplemented_device("I2S2ext", 0x40003000, 0x400);
create_unimplemented_device("I2S3ext", 0x40004000, 0x400);
create_unimplemented_device("I2C1", 0x40005400, 0x400);
create_unimplemented_device("I2C2", 0x40005800, 0x400);
create_unimplemented_device("I2C3", 0x40005C00, 0x400);
create_unimplemented_device("CAN1", 0x40006400, 0x400);
create_unimplemented_device("CAN2", 0x40006800, 0x400);
create_unimplemented_device("PWR", 0x40007000, 0x400);
create_unimplemented_device("DAC", 0x40007400, 0x400);
create_unimplemented_device("timer[1]", 0x40010000, 0x400);
create_unimplemented_device("timer[8]", 0x40010400, 0x400);
create_unimplemented_device("SDIO", 0x40012C00, 0x400);
create_unimplemented_device("timer[9]", 0x40014000, 0x400);
create_unimplemented_device("timer[10]", 0x40014400, 0x400);
create_unimplemented_device("timer[11]", 0x40014800, 0x400);
create_unimplemented_device("GPIOA", 0x40020000, 0x400);
create_unimplemented_device("GPIOB", 0x40020400, 0x400);
create_unimplemented_device("GPIOC", 0x40020800, 0x400);
create_unimplemented_device("GPIOD", 0x40020C00, 0x400);
create_unimplemented_device("GPIOE", 0x40021000, 0x400);
create_unimplemented_device("GPIOF", 0x40021400, 0x400);
create_unimplemented_device("GPIOG", 0x40021800, 0x400);
create_unimplemented_device("GPIOH", 0x40021C00, 0x400);
create_unimplemented_device("GPIOI", 0x40022000, 0x400);
create_unimplemented_device("CRC", 0x40023000, 0x400);
create_unimplemented_device("RCC", 0x40023800, 0x400);
create_unimplemented_device("Flash Int", 0x40023C00, 0x400);
create_unimplemented_device("BKPSRAM", 0x40024000, 0x400);
create_unimplemented_device("DMA1", 0x40026000, 0x400);
create_unimplemented_device("DMA2", 0x40026400, 0x400);
create_unimplemented_device("Ethernet", 0x40028000, 0x1400);
create_unimplemented_device("USB OTG HS", 0x40040000, 0x30000);
create_unimplemented_device("USB OTG FS", 0x50000000, 0x31000);
create_unimplemented_device("DCMI", 0x50050000, 0x400);
create_unimplemented_device("RNG", 0x50060800, 0x400);
}
static Property stm32f405_soc_properties[] = {
DEFINE_PROP_STRING("cpu-type", STM32F405State, cpu_type),
DEFINE_PROP_END_OF_LIST(),
};
static void stm32f405_soc_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = stm32f405_soc_realize;
device_class_set_props(dc, stm32f405_soc_properties);
/* No vmstate or reset required: device has no internal state */
}
static const TypeInfo stm32f405_soc_info = {
.name = TYPE_STM32F405_SOC,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(STM32F405State),
.instance_init = stm32f405_soc_initfn,
.class_init = stm32f405_soc_class_init,
};
static void stm32f405_soc_types(void)
{
type_register_static(&stm32f405_soc_info);
}
type_init(stm32f405_soc_types)
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