@@ -26,6 +26,122 @@ OBJECT_DECLARE_SIMPLE_TYPE(Stm32l4x5RccState, STM32L4X5_RCC)
/* In the Stm32l4x5 clock tree, mux have at most 7 sources */
#define RCC_NUM_CLOCK_MUX_SRC 7
+/* NB: Prescaler are assimilated to mux with one source and one output */
+typedef enum RccClockMux {
+ /* Internal muxes that arent't exposed publicly to other peripherals */
+ RCC_CLOCK_MUX_SYSCLK,
+ RCC_CLOCK_MUX_PLL_INPUT,
+ RCC_CLOCK_MUX_HCLK,
+ RCC_CLOCK_MUX_PCLK1,
+ RCC_CLOCK_MUX_PCLK2,
+ RCC_CLOCK_MUX_HSE_OVER_32,
+ RCC_CLOCK_MUX_LCD_AND_RTC_COMMON,
+
+ /* Muxes with a publicly available output */
+ RCC_CLOCK_MUX_CORTEX_REFCLK,
+ RCC_CLOCK_MUX_USART1,
+ RCC_CLOCK_MUX_USART2,
+ RCC_CLOCK_MUX_USART3,
+ RCC_CLOCK_MUX_UART4,
+ RCC_CLOCK_MUX_UART5,
+ RCC_CLOCK_MUX_LPUART1,
+ RCC_CLOCK_MUX_I2C1,
+ RCC_CLOCK_MUX_I2C2,
+ RCC_CLOCK_MUX_I2C3,
+ RCC_CLOCK_MUX_LPTIM1,
+ RCC_CLOCK_MUX_LPTIM2,
+ RCC_CLOCK_MUX_SWPMI1,
+ RCC_CLOCK_MUX_MCO,
+ RCC_CLOCK_MUX_LSCO,
+ RCC_CLOCK_MUX_DFSDM1,
+ RCC_CLOCK_MUX_ADC,
+ RCC_CLOCK_MUX_CLK48,
+ RCC_CLOCK_MUX_SAI1,
+ RCC_CLOCK_MUX_SAI2,
+
+ /*
+ * Mux that have only one input and one output assigned to as peripheral.
+ * They could be direct lines but it is simpler
+ * to use the same logic for all outputs.
+ */
+ /* - AHB1 */
+ RCC_CLOCK_MUX_TSC,
+ RCC_CLOCK_MUX_CRC,
+ RCC_CLOCK_MUX_FLASH,
+ RCC_CLOCK_MUX_DMA2,
+ RCC_CLOCK_MUX_DMA1,
+
+ /* - AHB2 */
+ RCC_CLOCK_MUX_RNG,
+ RCC_CLOCK_MUX_AES,
+ RCC_CLOCK_MUX_OTGFS,
+ RCC_CLOCK_MUX_GPIOA,
+ RCC_CLOCK_MUX_GPIOB,
+ RCC_CLOCK_MUX_GPIOC,
+ RCC_CLOCK_MUX_GPIOD,
+ RCC_CLOCK_MUX_GPIOE,
+ RCC_CLOCK_MUX_GPIOF,
+ RCC_CLOCK_MUX_GPIOG,
+ RCC_CLOCK_MUX_GPIOH,
+
+ /* - AHB3 */
+ RCC_CLOCK_MUX_QSPI,
+ RCC_CLOCK_MUX_FMC,
+
+ /* - APB1 */
+ RCC_CLOCK_MUX_OPAMP,
+ RCC_CLOCK_MUX_DAC1,
+ RCC_CLOCK_MUX_PWR,
+ RCC_CLOCK_MUX_CAN1,
+ RCC_CLOCK_MUX_SPI3,
+ RCC_CLOCK_MUX_SPI2,
+ RCC_CLOCK_MUX_WWDG,
+ RCC_CLOCK_MUX_LCD,
+ RCC_CLOCK_MUX_TIM7,
+ RCC_CLOCK_MUX_TIM6,
+ RCC_CLOCK_MUX_TIM5,
+ RCC_CLOCK_MUX_TIM4,
+ RCC_CLOCK_MUX_TIM3,
+ RCC_CLOCK_MUX_TIM2,
+
+ /* - APB2 */
+ RCC_CLOCK_MUX_TIM17,
+ RCC_CLOCK_MUX_TIM16,
+ RCC_CLOCK_MUX_TIM15,
+ RCC_CLOCK_MUX_TIM8,
+ RCC_CLOCK_MUX_SPI1,
+ RCC_CLOCK_MUX_TIM1,
+ RCC_CLOCK_MUX_SDMMC1,
+ RCC_CLOCK_MUX_FW,
+ RCC_CLOCK_MUX_SYSCFG,
+
+ /* - BDCR */
+ RCC_CLOCK_MUX_RTC,
+
+ /* - OTHER */
+ RCC_CLOCK_MUX_CORTEX_FCLK,
+
+ RCC_NUM_CLOCK_MUX
+} RccClockMux;
+
+typedef struct RccClockMuxState {
+ DeviceState parent_obj;
+
+ RccClockMux id;
+ Clock *srcs[RCC_NUM_CLOCK_MUX_SRC];
+ Clock *out;
+ bool enabled;
+ uint32_t src;
+ uint32_t multiplier;
+ uint32_t divider;
+
+ /*
+ * Used by clock srcs update callback to retrieve both the clock and the
+ * source number.
+ */
+ struct RccClockMuxState *backref[RCC_NUM_CLOCK_MUX_SRC];
+} RccClockMuxState;
+
struct Stm32l4x5RccState {
SysBusDevice parent_obj;
@@ -71,6 +187,9 @@ struct Stm32l4x5RccState {
Clock *sai1_extclk;
Clock *sai2_extclk;
+ /* Muxes ~= outputs */
+ RccClockMuxState clock_muxes[RCC_NUM_CLOCK_MUX];
+
qemu_irq irq;
uint64_t hse_frequency;
uint64_t sai1_extclk_frequency;
@@ -21,6 +21,8 @@
#include "hw/registerfields.h"
#include "hw/misc/stm32l4x5_rcc.h"
+#define TYPE_RCC_CLOCK_MUX "stm32l4x5-rcc-clock-mux"
+OBJECT_DECLARE_SIMPLE_TYPE(RccClockMuxState, RCC_CLOCK_MUX)
/* Register map */
REG32(CR, 0x00)
@@ -283,4 +285,31 @@ REG32(CSR, 0x94)
R_CSR_FWRSTF_MASK | \
R_CSR_LSIRDY_MASK)
+typedef enum RccClockMuxSource {
+ RCC_CLOCK_MUX_SRC_GND = 0,
+ RCC_CLOCK_MUX_SRC_HSI,
+ RCC_CLOCK_MUX_SRC_HSE,
+ RCC_CLOCK_MUX_SRC_MSI,
+ RCC_CLOCK_MUX_SRC_LSI,
+ RCC_CLOCK_MUX_SRC_LSE,
+ RCC_CLOCK_MUX_SRC_SAI1_EXTCLK,
+ RCC_CLOCK_MUX_SRC_SAI2_EXTCLK,
+ RCC_CLOCK_MUX_SRC_PLL,
+ RCC_CLOCK_MUX_SRC_PLLSAI1,
+ RCC_CLOCK_MUX_SRC_PLLSAI2,
+ RCC_CLOCK_MUX_SRC_PLLSAI3,
+ RCC_CLOCK_MUX_SRC_PLL48M1,
+ RCC_CLOCK_MUX_SRC_PLL48M2,
+ RCC_CLOCK_MUX_SRC_PLLADC1,
+ RCC_CLOCK_MUX_SRC_PLLADC2,
+ RCC_CLOCK_MUX_SRC_SYSCLK,
+ RCC_CLOCK_MUX_SRC_HCLK,
+ RCC_CLOCK_MUX_SRC_PCLK1,
+ RCC_CLOCK_MUX_SRC_PCLK2,
+ RCC_CLOCK_MUX_SRC_HSE_OVER_32,
+ RCC_CLOCK_MUX_SRC_LCD_AND_RTC_COMMON,
+
+ RCC_CLOCK_MUX_SRC_NUMBER,
+} RccClockMuxSource;
+
#endif /* HW_STM32L4X5_RCC_INTERNALS_H */
@@ -36,6 +36,134 @@
#define LSE_FRQ 32768ULL
#define LSI_FRQ 32000ULL
+static void clock_mux_update(RccClockMuxState *mux)
+{
+ uint64_t src_freq;
+ Clock *current_source = mux->srcs[mux->src];
+ uint32_t freq_multiplier = 0;
+ /*
+ * To avoid rounding errors, we use the clock period instead of the
+ * frequency.
+ * This means that the multiplier of the mux becomes the divider of
+ * the clock and the divider of the mux becomes the multiplier of the
+ * clock.
+ */
+ if (mux->enabled && mux->divider) {
+ freq_multiplier = mux->divider;
+ }
+
+ clock_set_mul_div(mux->out, freq_multiplier, mux->multiplier);
+ clock_update(mux->out, clock_get(current_source));
+
+ src_freq = clock_get_hz(current_source);
+ /* TODO: can we simply detect if the config changed so that we reduce log spam ? */
+ trace_stm32l4x5_rcc_mux_update(mux->id, mux->src, src_freq,
+ mux->multiplier, mux->divider);
+}
+
+static void clock_mux_src_update(void *opaque, ClockEvent event)
+{
+ RccClockMuxState **backref = opaque;
+ RccClockMuxState *s = *backref;
+ /*
+ * The backref value is equal to:
+ * s->backref + (sizeof(RccClockMuxState *) * update_src).
+ * By subtracting we can get back the index of the updated clock.
+ */
+ const uint32_t update_src = backref - s->backref;
+ /* Only update if the clock that was updated is the current source */
+ if (update_src == s->src) {
+ clock_mux_update(s);
+ }
+}
+
+static void clock_mux_init(Object *obj)
+{
+ RccClockMuxState *s = RCC_CLOCK_MUX(obj);
+ size_t i;
+
+ for (i = 0; i < RCC_NUM_CLOCK_MUX_SRC; i++) {
+ char *name = g_strdup_printf("srcs[%zu]", i);
+ s->backref[i] = s;
+ s->srcs[i] = qdev_init_clock_in(DEVICE(s), name,
+ clock_mux_src_update,
+ &s->backref[i],
+ ClockUpdate);
+ g_free(name);
+ }
+
+ s->out = qdev_init_clock_out(DEVICE(s), "out");
+}
+
+static void clock_mux_reset_hold(Object *obj)
+{ }
+
+static const VMStateDescription clock_mux_vmstate = {
+ .name = TYPE_RCC_CLOCK_MUX,
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(id, RccClockMuxState),
+ VMSTATE_ARRAY_CLOCK(srcs, RccClockMuxState,
+ RCC_NUM_CLOCK_MUX_SRC),
+ VMSTATE_BOOL(enabled, RccClockMuxState),
+ VMSTATE_UINT32(src, RccClockMuxState),
+ VMSTATE_UINT32(multiplier, RccClockMuxState),
+ VMSTATE_UINT32(divider, RccClockMuxState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void clock_mux_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ ResettableClass *rc = RESETTABLE_CLASS(klass);
+
+ rc->phases.hold = clock_mux_reset_hold;
+ dc->vmsd = &clock_mux_vmstate;
+}
+
+static void clock_mux_set_enable(RccClockMuxState *mux, bool enabled)
+{
+ if (mux->enabled == enabled) {
+ return;
+ }
+
+ if (enabled) {
+ trace_stm32l4x5_rcc_mux_enable(mux->id);
+ } else {
+ trace_stm32l4x5_rcc_mux_disable(mux->id);
+ }
+
+ mux->enabled = enabled;
+ clock_mux_update(mux);
+}
+
+static void clock_mux_set_factor(RccClockMuxState *mux,
+ uint32_t multiplier, uint32_t divider)
+{
+ if (mux->multiplier == multiplier && mux->divider == divider) {
+ return;
+ }
+ trace_stm32l4x5_rcc_mux_set_factor(mux->id,
+ mux->multiplier, multiplier, mux->divider, divider);
+
+ mux->multiplier = multiplier;
+ mux->divider = divider;
+ clock_mux_update(mux);
+}
+
+static void clock_mux_set_source(RccClockMuxState *mux, RccClockMuxSource src)
+{
+ if (mux->src == src) {
+ return;
+ }
+
+ trace_stm32l4x5_rcc_mux_set_src(mux->id, mux->src, src);
+ mux->src = src;
+ clock_mux_update(mux);
+}
+
static void rcc_update_irq(Stm32l4x5RccState *s)
{
if (s->cifr & CIFR_IRQ_MASK) {
@@ -335,6 +463,7 @@ static const ClockPortInitArray stm32l4x5_rcc_clocks = {
static void stm32l4x5_rcc_init(Object *obj)
{
Stm32l4x5RccState *s = STM32L4X5_RCC(obj);
+ size_t i;
sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq);
@@ -344,6 +473,14 @@ static void stm32l4x5_rcc_init(Object *obj)
qdev_init_clocks(DEVICE(s), stm32l4x5_rcc_clocks);
+ for (i = 0; i < RCC_NUM_CLOCK_MUX; i++) {
+
+ object_initialize_child(obj, "clock[*]",
+ &s->clock_muxes[i],
+ TYPE_RCC_CLOCK_MUX);
+
+ }
+
s->gnd = clock_new(obj, "gnd");
}
@@ -396,6 +533,7 @@ static const VMStateDescription vmstate_stm32l4x5_rcc = {
static void stm32l4x5_rcc_realize(DeviceState *dev, Error **errp)
{
Stm32l4x5RccState *s = STM32L4X5_RCC(dev);
+ size_t i;
if (s->hse_frequency < 4000000ULL ||
s->hse_frequency > 48000000ULL) {
@@ -405,10 +543,26 @@ static void stm32l4x5_rcc_realize(DeviceState *dev, Error **errp)
return;
}
+ for (i = 0; i < RCC_NUM_CLOCK_MUX; i++) {
+ RccClockMuxState *clock_mux = &s->clock_muxes[i];
+
+ if (!qdev_realize(DEVICE(clock_mux), NULL, errp)) {
+ return;
+ }
+ }
+
clock_update_hz(s->msi_rc, MSI_DEFAULT_FRQ);
clock_update_hz(s->sai1_extclk, s->sai1_extclk_frequency);
clock_update_hz(s->sai2_extclk, s->sai2_extclk_frequency);
clock_update(s->gnd, 0);
+
+ /*
+ * Dummy values to make compilation pass.
+ * Removed in later commits.
+ */
+ clock_mux_set_source(&s->clock_muxes[0], RCC_CLOCK_MUX_SRC_GND);
+ clock_mux_set_enable(&s->clock_muxes[0], true);
+ clock_mux_set_factor(&s->clock_muxes[0], 1, 1);
}
static Property stm32l4x5_rcc_properties[] = {
@@ -440,6 +594,12 @@ static const TypeInfo stm32l4x5_rcc_types[] = {
.instance_size = sizeof(Stm32l4x5RccState),
.instance_init = stm32l4x5_rcc_init,
.class_init = stm32l4x5_rcc_class_init,
+ }, {
+ .name = TYPE_RCC_CLOCK_MUX,
+ .parent = TYPE_DEVICE,
+ .instance_size = sizeof(RccClockMuxState),
+ .instance_init = clock_mux_init,
+ .class_init = clock_mux_class_init,
}
};
@@ -177,6 +177,11 @@ stm32l4x5_exti_write(uint64_t addr, uint64_t data) "reg write: addr: 0x%" PRIx64
# stm32l4x5_rcc.c
stm32l4x5_rcc_read(uint64_t addr, uint32_t data) "RCC: Read <0x%" PRIx64 "> -> 0x%" PRIx32
stm32l4x5_rcc_write(uint64_t addr, uint32_t data) "RCC: Write <0x%" PRIx64 "> <- 0x%" PRIx32
+stm32l4x5_rcc_mux_enable(uint32_t mux_id) "RCC: Mux %d enabled"
+stm32l4x5_rcc_mux_disable(uint32_t mux_id) "RCC: Mux %d disabled"
+stm32l4x5_rcc_mux_set_factor(uint32_t mux_id, uint32_t old_multiplier, uint32_t new_multiplier, uint32_t old_divider, uint32_t new_divider) "RCC: Mux %d factor changed: multiplier (%u -> %u), divider (%u -> %u)"
+stm32l4x5_rcc_mux_set_src(uint32_t mux_id, uint32_t old_src, uint32_t new_src) "RCC: Mux %d source changed: from %u to %u"
+stm32l4x5_rcc_mux_update(uint32_t mux_id, uint32_t src, uint64_t src_freq, uint32_t multiplier, uint32_t divider) "RCC: Mux %d src %d update: src_freq %" PRIu64 " multiplier %" PRIu32 " divider %" PRIu32
# tz-mpc.c
tz_mpc_reg_read(uint32_t offset, uint64_t data, unsigned size) "TZ MPC regs read: offset 0x%x data 0x%" PRIx64 " size %u"