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qemu/hw/misc/stm32l4x5_rcc.c
Arnaud Minier 3b55147717 hw/misc/stm32l4x5_rcc: Add write protections to CR register 
Add write protections for the fields in the CR register.
PLL configuration write protections (among others) have not
been handled yet. This is planned in a future patch set.

Signed-off-by: Arnaud Minier <arnaud.minier@telecom-paris.fr>
Signed-off-by: Inès Varhol <ines.varhol@telecom-paris.fr>
Message-id: 20240303140643.81957-7-arnaud.minier@telecom-paris.fr
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
2024-03-05 13:22:56 +00:00

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/*
* STM32L4X5 RCC (Reset and clock control)
*
* Copyright (c) 2023 Arnaud Minier <arnaud.minier@telecom-paris.fr>
* Copyright (c) 2023 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.
*
* The reference used is the STMicroElectronics RM0351 Reference manual
* for STM32L4x5 and STM32L4x6 advanced Arm ® -based 32-bit MCUs.
*
* Inspired by the BCM2835 CPRMAN clock manager implementation by Luc Michel.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "qemu/timer.h"
#include "qapi/error.h"
#include "migration/vmstate.h"
#include "hw/misc/stm32l4x5_rcc.h"
#include "hw/misc/stm32l4x5_rcc_internals.h"
#include "hw/clock.h"
#include "hw/irq.h"
#include "hw/qdev-clock.h"
#include "hw/qdev-properties.h"
#include "hw/qdev-properties-system.h"
#include "hw/registerfields.h"
#include "trace.h"
#define HSE_DEFAULT_FRQ 48000000ULL
#define HSI_FRQ 16000000ULL
#define MSI_DEFAULT_FRQ 4000000ULL
#define LSE_FRQ 32768ULL
#define LSI_FRQ 32000ULL
/*
* Function to simply acknowledge and propagate changes in a clock mux
* frequency.
* `bypass_source` allows to bypass the period of the current source and just
* consider it equal to 0. This is useful during the hold phase of reset.
*/
static void clock_mux_update(RccClockMuxState *mux, bool bypass_source)
{
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 (!bypass_source && 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, false);
}
}
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_enter(Object *obj, ResetType type)
{
RccClockMuxState *s = RCC_CLOCK_MUX(obj);
set_clock_mux_init_info(s, s->id);
}
static void clock_mux_reset_hold(Object *obj)
{
RccClockMuxState *s = RCC_CLOCK_MUX(obj);
clock_mux_update(s, true);
}
static void clock_mux_reset_exit(Object *obj)
{
RccClockMuxState *s = RCC_CLOCK_MUX(obj);
clock_mux_update(s, false);
}
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.enter = clock_mux_reset_enter;
rc->phases.hold = clock_mux_reset_hold;
rc->phases.exit = clock_mux_reset_exit;
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, false);
}
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, false);
}
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, false);
}
/*
* Acknowledge and propagate changes in a PLL frequency.
* `bypass_source` allows to bypass the period of the current source and just
* consider it equal to 0. This is useful during the hold phase of reset.
*/
static void pll_update(RccPllState *pll, bool bypass_source)
{
uint64_t vco_freq, old_channel_freq, channel_freq;
int i;
/* The common PLLM factor is handled by the PLL mux */
vco_freq = muldiv64(clock_get_hz(pll->in), pll->vco_multiplier, 1);
for (i = 0; i < RCC_NUM_CHANNEL_PLL_OUT; i++) {
if (!pll->channel_exists[i]) {
continue;
}
old_channel_freq = clock_get_hz(pll->channels[i]);
if (bypass_source ||
!pll->enabled ||
!pll->channel_enabled[i] ||
!pll->channel_divider[i]) {
channel_freq = 0;
} else {
channel_freq = muldiv64(vco_freq,
1,
pll->channel_divider[i]);
}
/* No change, early continue to avoid log spam and useless propagation */
if (old_channel_freq == channel_freq) {
continue;
}
clock_update_hz(pll->channels[i], channel_freq);
trace_stm32l4x5_rcc_pll_update(pll->id, i, vco_freq,
old_channel_freq, channel_freq);
}
}
static void pll_src_update(void *opaque, ClockEvent event)
{
RccPllState *s = opaque;
pll_update(s, false);
}
static void pll_init(Object *obj)
{
RccPllState *s = RCC_PLL(obj);
size_t i;
s->in = qdev_init_clock_in(DEVICE(s), "in",
pll_src_update, s, ClockUpdate);
const char *names[] = {
"out-p", "out-q", "out-r",
};
for (i = 0; i < RCC_NUM_CHANNEL_PLL_OUT; i++) {
s->channels[i] = qdev_init_clock_out(DEVICE(s), names[i]);
}
}
static void pll_reset_enter(Object *obj, ResetType type)
{
RccPllState *s = RCC_PLL(obj);
set_pll_init_info(s, s->id);
}
static void pll_reset_hold(Object *obj)
{
RccPllState *s = RCC_PLL(obj);
pll_update(s, true);
}
static void pll_reset_exit(Object *obj)
{
RccPllState *s = RCC_PLL(obj);
pll_update(s, false);
}
static const VMStateDescription pll_vmstate = {
.name = TYPE_RCC_PLL,
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(id, RccPllState),
VMSTATE_CLOCK(in, RccPllState),
VMSTATE_ARRAY_CLOCK(channels, RccPllState,
RCC_NUM_CHANNEL_PLL_OUT),
VMSTATE_BOOL(enabled, RccPllState),
VMSTATE_UINT32(vco_multiplier, RccPllState),
VMSTATE_BOOL_ARRAY(channel_enabled, RccPllState, RCC_NUM_CHANNEL_PLL_OUT),
VMSTATE_BOOL_ARRAY(channel_exists, RccPllState, RCC_NUM_CHANNEL_PLL_OUT),
VMSTATE_UINT32_ARRAY(channel_divider, RccPllState, RCC_NUM_CHANNEL_PLL_OUT),
VMSTATE_END_OF_LIST()
}
};
static void pll_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
ResettableClass *rc = RESETTABLE_CLASS(klass);
rc->phases.enter = pll_reset_enter;
rc->phases.hold = pll_reset_hold;
rc->phases.exit = pll_reset_exit;
dc->vmsd = &pll_vmstate;
}
static void pll_set_vco_multiplier(RccPllState *pll, uint32_t vco_multiplier)
{
if (pll->vco_multiplier == vco_multiplier) {
return;
}
if (vco_multiplier < 8 || vco_multiplier > 86) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: VCO multiplier is out of bound (%u) for PLL %u\n",
__func__, vco_multiplier, pll->id);
return;
}
trace_stm32l4x5_rcc_pll_set_vco_multiplier(pll->id,
pll->vco_multiplier, vco_multiplier);
pll->vco_multiplier = vco_multiplier;
pll_update(pll, false);
}
static void pll_set_enable(RccPllState *pll, bool enabled)
{
if (pll->enabled == enabled) {
return;
}
pll->enabled = enabled;
pll_update(pll, false);
}
static void pll_set_channel_enable(RccPllState *pll,
PllCommonChannels channel,
bool enabled)
{
if (pll->channel_enabled[channel] == enabled) {
return;
}
if (enabled) {
trace_stm32l4x5_rcc_pll_channel_enable(pll->id, channel);
} else {
trace_stm32l4x5_rcc_pll_channel_disable(pll->id, channel);
}
pll->channel_enabled[channel] = enabled;
pll_update(pll, false);
}
static void pll_set_channel_divider(RccPllState *pll,
PllCommonChannels channel,
uint32_t divider)
{
if (pll->channel_divider[channel] == divider) {
return;
}
trace_stm32l4x5_rcc_pll_set_channel_divider(pll->id,
channel, pll->channel_divider[channel], divider);
pll->channel_divider[channel] = divider;
pll_update(pll, false);
}
static void rcc_update_irq(Stm32l4x5RccState *s)
{
/*
* TODO: Handle LSECSSF and CSSF flags when the CSS is implemented.
*/
if (s->cifr & CIFR_IRQ_MASK) {
qemu_irq_raise(s->irq);
} else {
qemu_irq_lower(s->irq);
}
}
static void rcc_update_msi(Stm32l4x5RccState *s, uint32_t previous_value)
{
uint32_t val;
static const uint32_t msirange[] = {
100000, 200000, 400000, 800000, 1000000, 2000000,
4000000, 8000000, 16000000, 24000000, 32000000, 48000000
};
/* MSIRANGE and MSIRGSEL */
val = extract32(s->cr, R_CR_MSIRGSEL_SHIFT, R_CR_MSIRGSEL_LENGTH);
if (val) {
/* MSIRGSEL is set, use the MSIRANGE field */
val = extract32(s->cr, R_CR_MSIRANGE_SHIFT, R_CR_MSIRANGE_LENGTH);
} else {
/* MSIRGSEL is not set, use the MSISRANGE field */
val = extract32(s->csr, R_CSR_MSISRANGE_SHIFT, R_CSR_MSISRANGE_LENGTH);
}
if (val < ARRAY_SIZE(msirange)) {
clock_update_hz(s->msi_rc, msirange[val]);
} else {
/*
* There is a hardware write protection if the value is out of bound.
* Restore the previous value.
*/
s->cr = (s->cr & ~R_CSR_MSISRANGE_MASK) |
(previous_value & R_CSR_MSISRANGE_MASK);
}
}
/*
* TODO: Add write-protection for all registers:
* DONE: CR
*/
static void rcc_update_cr_register(Stm32l4x5RccState *s, uint32_t previous_value)
{
int val;
const RccClockMuxSource current_pll_src =
CLOCK_MUX_INIT_INFO[RCC_CLOCK_MUX_PLL_INPUT].src_mapping[
s->clock_muxes[RCC_CLOCK_MUX_PLL_INPUT].src];
/* PLLSAI2ON and update PLLSAI2RDY */
val = FIELD_EX32(s->cr, CR, PLLSAI2ON);
pll_set_enable(&s->plls[RCC_PLL_PLLSAI2], val);
s->cr = (s->cr & ~R_CR_PLLSAI2RDY_MASK) |
(val << R_CR_PLLSAI2RDY_SHIFT);
if (s->cier & R_CIER_PLLSAI2RDYIE_MASK) {
s->cifr |= R_CIFR_PLLSAI2RDYF_MASK;
}
/* PLLSAI1ON and update PLLSAI1RDY */
val = FIELD_EX32(s->cr, CR, PLLSAI1ON);
pll_set_enable(&s->plls[RCC_PLL_PLLSAI1], val);
s->cr = (s->cr & ~R_CR_PLLSAI1RDY_MASK) |
(val << R_CR_PLLSAI1RDY_SHIFT);
if (s->cier & R_CIER_PLLSAI1RDYIE_MASK) {
s->cifr |= R_CIFR_PLLSAI1RDYF_MASK;
}
/*
* PLLON and update PLLRDY
* PLLON cannot be reset if the PLL clock is used as the system clock.
*/
val = FIELD_EX32(s->cr, CR, PLLON);
if (FIELD_EX32(s->cfgr, CFGR, SWS) != 0b11) {
pll_set_enable(&s->plls[RCC_PLL_PLL], val);
s->cr = (s->cr & ~R_CR_PLLRDY_MASK) |
(val << R_CR_PLLRDY_SHIFT);
if (s->cier & R_CIER_PLLRDYIE_MASK) {
s->cifr |= R_CIFR_PLLRDYF_MASK;
}
} else {
s->cr |= R_CR_PLLON_MASK;
}
/* CSSON: TODO */
/* HSEBYP: TODO */
/*
* HSEON and update HSERDY.
* HSEON cannot be reset if the HSE oscillator is used directly or
* indirectly as the system clock.
*/
val = FIELD_EX32(s->cr, CR, HSEON);
if (FIELD_EX32(s->cfgr, CFGR, SWS) != 0b10 &&
current_pll_src != RCC_CLOCK_MUX_SRC_HSE) {
s->cr = (s->cr & ~R_CR_HSERDY_MASK) |
(val << R_CR_HSERDY_SHIFT);
if (val) {
clock_update_hz(s->hse, s->hse_frequency);
if (s->cier & R_CIER_HSERDYIE_MASK) {
s->cifr |= R_CIFR_HSERDYF_MASK;
}
} else {
clock_update(s->hse, 0);
}
} else {
s->cr |= R_CR_HSEON_MASK;
}
/* HSIAFS: TODO*/
/* HSIKERON: TODO*/
/*
* HSION and update HSIRDY
* HSION is set by hardware if the HSI16 is used directly
* or indirectly as system clock.
*/
if (FIELD_EX32(s->cfgr, CFGR, SWS) == 0b01 ||
current_pll_src == RCC_CLOCK_MUX_SRC_HSI) {
s->cr |= (R_CR_HSION_MASK | R_CR_HSIRDY_MASK);
clock_update_hz(s->hsi16_rc, HSI_FRQ);
if (s->cier & R_CIER_HSIRDYIE_MASK) {
s->cifr |= R_CIFR_HSIRDYF_MASK;
}
} else {
val = FIELD_EX32(s->cr, CR, HSION);
if (val) {
clock_update_hz(s->hsi16_rc, HSI_FRQ);
s->cr |= R_CR_HSIRDY_MASK;
if (s->cier & R_CIER_HSIRDYIE_MASK) {
s->cifr |= R_CIFR_HSIRDYF_MASK;
}
} else {
clock_update(s->hsi16_rc, 0);
s->cr &= ~R_CR_HSIRDY_MASK;
}
}
/* MSIPLLEN: TODO */
/*
* MSION and update MSIRDY
* Set by hardware when used directly or indirectly as system clock.
*/
if (FIELD_EX32(s->cfgr, CFGR, SWS) == 0b00 ||
current_pll_src == RCC_CLOCK_MUX_SRC_MSI) {
s->cr |= (R_CR_MSION_MASK | R_CR_MSIRDY_MASK);
if (!(previous_value & R_CR_MSION_MASK) && (s->cier & R_CIER_MSIRDYIE_MASK)) {
s->cifr |= R_CIFR_MSIRDYF_MASK;
}
rcc_update_msi(s, previous_value);
} else {
val = FIELD_EX32(s->cr, CR, MSION);
if (val) {
s->cr |= R_CR_MSIRDY_MASK;
rcc_update_msi(s, previous_value);
if (s->cier & R_CIER_MSIRDYIE_MASK) {
s->cifr |= R_CIFR_MSIRDYF_MASK;
}
} else {
s->cr &= ~R_CR_MSIRDY_MASK;
clock_update(s->msi_rc, 0);
}
}
rcc_update_irq(s);
}
static void rcc_update_cfgr_register(Stm32l4x5RccState *s)
{
uint32_t val;
/* MCOPRE */
val = FIELD_EX32(s->cfgr, CFGR, MCOPRE);
assert(val <= 0b100);
clock_mux_set_factor(&s->clock_muxes[RCC_CLOCK_MUX_MCO],
1, 1 << val);
/* MCOSEL */
val = FIELD_EX32(s->cfgr, CFGR, MCOSEL);
assert(val <= 0b111);
if (val == 0) {
clock_mux_set_enable(&s->clock_muxes[RCC_CLOCK_MUX_MCO], false);
} else {
clock_mux_set_enable(&s->clock_muxes[RCC_CLOCK_MUX_MCO], true);
clock_mux_set_source(&s->clock_muxes[RCC_CLOCK_MUX_MCO],
val - 1);
}
/* STOPWUCK */
/* TODO */
/* PPRE2 */
val = FIELD_EX32(s->cfgr, CFGR, PPRE2);
if (val < 0b100) {
clock_mux_set_factor(&s->clock_muxes[RCC_CLOCK_MUX_PCLK2],
1, 1);
} else {
clock_mux_set_factor(&s->clock_muxes[RCC_CLOCK_MUX_PCLK2],
1, 1 << (val - 0b11));
}
/* PPRE1 */
val = FIELD_EX32(s->cfgr, CFGR, PPRE1);
if (val < 0b100) {
clock_mux_set_factor(&s->clock_muxes[RCC_CLOCK_MUX_PCLK1],
1, 1);
} else {
clock_mux_set_factor(&s->clock_muxes[RCC_CLOCK_MUX_PCLK1],
1, 1 << (val - 0b11));
}
/* HPRE */
val = FIELD_EX32(s->cfgr, CFGR, HPRE);
if (val < 0b1000) {
clock_mux_set_factor(&s->clock_muxes[RCC_CLOCK_MUX_HCLK],
1, 1);
} else {
clock_mux_set_factor(&s->clock_muxes[RCC_CLOCK_MUX_HCLK],
1, 1 << (val - 0b111));
}
/* Update SWS */
val = FIELD_EX32(s->cfgr, CFGR, SW);
clock_mux_set_source(&s->clock_muxes[RCC_CLOCK_MUX_SYSCLK],
val);
s->cfgr &= ~R_CFGR_SWS_MASK;
s->cfgr |= val << R_CFGR_SWS_SHIFT;
}
static void rcc_update_ahb1enr(Stm32l4x5RccState *s)
{
#define AHB1ENR_SET_ENABLE(_peripheral_name) \
clock_mux_set_enable(&s->clock_muxes[RCC_CLOCK_MUX_##_peripheral_name], \
FIELD_EX32(s->ahb1enr, AHB1ENR, _peripheral_name##EN))
/* DMA2DEN: reserved for STM32L475xx */
AHB1ENR_SET_ENABLE(TSC);
AHB1ENR_SET_ENABLE(CRC);
AHB1ENR_SET_ENABLE(FLASH);
AHB1ENR_SET_ENABLE(DMA2);
AHB1ENR_SET_ENABLE(DMA1);
#undef AHB1ENR_SET_ENABLE
}
static void rcc_update_ahb2enr(Stm32l4x5RccState *s)
{
#define AHB2ENR_SET_ENABLE(_peripheral_name) \
clock_mux_set_enable(&s->clock_muxes[RCC_CLOCK_MUX_##_peripheral_name], \
FIELD_EX32(s->ahb2enr, AHB2ENR, _peripheral_name##EN))
AHB2ENR_SET_ENABLE(RNG);
/* HASHEN: reserved for STM32L475xx */
AHB2ENR_SET_ENABLE(AES);
/* DCMIEN: reserved for STM32L475xx */
AHB2ENR_SET_ENABLE(ADC);
AHB2ENR_SET_ENABLE(OTGFS);
/* GPIOIEN: reserved for STM32L475xx */
AHB2ENR_SET_ENABLE(GPIOA);
AHB2ENR_SET_ENABLE(GPIOB);
AHB2ENR_SET_ENABLE(GPIOC);
AHB2ENR_SET_ENABLE(GPIOD);
AHB2ENR_SET_ENABLE(GPIOE);
AHB2ENR_SET_ENABLE(GPIOF);
AHB2ENR_SET_ENABLE(GPIOG);
AHB2ENR_SET_ENABLE(GPIOH);
#undef AHB2ENR_SET_ENABLE
}
static void rcc_update_ahb3enr(Stm32l4x5RccState *s)
{
#define AHB3ENR_SET_ENABLE(_peripheral_name) \
clock_mux_set_enable(&s->clock_muxes[RCC_CLOCK_MUX_##_peripheral_name], \
FIELD_EX32(s->ahb3enr, AHB3ENR, _peripheral_name##EN))
AHB3ENR_SET_ENABLE(QSPI);
AHB3ENR_SET_ENABLE(FMC);
#undef AHB3ENR_SET_ENABLE
}
static void rcc_update_apb1enr(Stm32l4x5RccState *s)
{
#define APB1ENR1_SET_ENABLE(_peripheral_name) \
clock_mux_set_enable(&s->clock_muxes[RCC_CLOCK_MUX_##_peripheral_name], \
FIELD_EX32(s->apb1enr1, APB1ENR1, _peripheral_name##EN))
#define APB1ENR2_SET_ENABLE(_peripheral_name) \
clock_mux_set_enable(&s->clock_muxes[RCC_CLOCK_MUX_##_peripheral_name], \
FIELD_EX32(s->apb1enr2, APB1ENR2, _peripheral_name##EN))
/* APB1ENR1 */
APB1ENR1_SET_ENABLE(LPTIM1);
APB1ENR1_SET_ENABLE(OPAMP);
APB1ENR1_SET_ENABLE(DAC1);
APB1ENR1_SET_ENABLE(PWR);
/* CAN2: reserved for STM32L4x5 */
APB1ENR1_SET_ENABLE(CAN1);
/* CRSEN: reserved for STM32L4x5 */
APB1ENR1_SET_ENABLE(I2C3);
APB1ENR1_SET_ENABLE(I2C2);
APB1ENR1_SET_ENABLE(I2C1);
APB1ENR1_SET_ENABLE(UART5);
APB1ENR1_SET_ENABLE(UART4);
APB1ENR1_SET_ENABLE(USART3);
APB1ENR1_SET_ENABLE(USART2);
APB1ENR1_SET_ENABLE(SPI3);
APB1ENR1_SET_ENABLE(SPI2);
APB1ENR1_SET_ENABLE(WWDG);
/* RTCAPB: reserved for STM32L4x5 */
APB1ENR1_SET_ENABLE(LCD);
APB1ENR1_SET_ENABLE(TIM7);
APB1ENR1_SET_ENABLE(TIM6);
APB1ENR1_SET_ENABLE(TIM5);
APB1ENR1_SET_ENABLE(TIM4);
APB1ENR1_SET_ENABLE(TIM3);
APB1ENR1_SET_ENABLE(TIM2);
/* APB1ENR2 */
APB1ENR2_SET_ENABLE(LPTIM2);
APB1ENR2_SET_ENABLE(SWPMI1);
/* I2C4EN: reserved for STM32L4x5 */
APB1ENR2_SET_ENABLE(LPUART1);
#undef APB1ENR1_SET_ENABLE
#undef APB1ENR2_SET_ENABLE
}
static void rcc_update_apb2enr(Stm32l4x5RccState *s)
{
#define APB2ENR_SET_ENABLE(_peripheral_name) \
clock_mux_set_enable(&s->clock_muxes[RCC_CLOCK_MUX_##_peripheral_name], \
FIELD_EX32(s->apb2enr, APB2ENR, _peripheral_name##EN))
APB2ENR_SET_ENABLE(DFSDM1);
APB2ENR_SET_ENABLE(SAI2);
APB2ENR_SET_ENABLE(SAI1);
APB2ENR_SET_ENABLE(TIM17);
APB2ENR_SET_ENABLE(TIM16);
APB2ENR_SET_ENABLE(TIM15);
APB2ENR_SET_ENABLE(USART1);
APB2ENR_SET_ENABLE(TIM8);
APB2ENR_SET_ENABLE(SPI1);
APB2ENR_SET_ENABLE(TIM1);
APB2ENR_SET_ENABLE(SDMMC1);
APB2ENR_SET_ENABLE(FW);
APB2ENR_SET_ENABLE(SYSCFG);
#undef APB2ENR_SET_ENABLE
}
/*
* The 3 PLLs share the same register layout
* so we can use the same function for all of them
* Note: no frequency bounds checking is done here.
*/
static void rcc_update_pllsaixcfgr(Stm32l4x5RccState *s, RccPll pll_id)
{
uint32_t reg, val;
switch (pll_id) {
case RCC_PLL_PLL:
reg = s->pllcfgr;
break;
case RCC_PLL_PLLSAI1:
reg = s->pllsai1cfgr;
break;
case RCC_PLL_PLLSAI2:
reg = s->pllsai2cfgr;
break;
default:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Invalid PLL ID: %u\n", __func__, pll_id);
return;
}
/* PLLPDIV */
val = FIELD_EX32(reg, PLLCFGR, PLLPDIV);
/* 1 is a reserved value */
if (val == 0) {
/* Get PLLP value */
val = FIELD_EX32(reg, PLLCFGR, PLLP);
pll_set_channel_divider(&s->plls[pll_id], RCC_PLL_COMMON_CHANNEL_P,
(val ? 17 : 7));
} else if (val > 1) {
pll_set_channel_divider(&s->plls[pll_id], RCC_PLL_COMMON_CHANNEL_P,
val);
}
/* PLLR */
val = FIELD_EX32(reg, PLLCFGR, PLLR);
pll_set_channel_divider(&s->plls[pll_id], RCC_PLL_COMMON_CHANNEL_R,
2 * (val + 1));
/* PLLREN */
val = FIELD_EX32(reg, PLLCFGR, PLLREN);
pll_set_channel_enable(&s->plls[pll_id], RCC_PLL_COMMON_CHANNEL_R, val);
/* PLLQ */
val = FIELD_EX32(reg, PLLCFGR, PLLQ);
pll_set_channel_divider(&s->plls[pll_id], RCC_PLL_COMMON_CHANNEL_Q,
2 * (val + 1));
/* PLLQEN */
val = FIELD_EX32(reg, PLLCFGR, PLLQEN);
pll_set_channel_enable(&s->plls[pll_id], RCC_PLL_COMMON_CHANNEL_Q, val);
/* PLLPEN */
val = FIELD_EX32(reg, PLLCFGR, PLLPEN);
pll_set_channel_enable(&s->plls[pll_id], RCC_PLL_COMMON_CHANNEL_P, val);
/* PLLN */
val = FIELD_EX32(reg, PLLCFGR, PLLN);
pll_set_vco_multiplier(&s->plls[pll_id], val);
}
static void rcc_update_pllcfgr(Stm32l4x5RccState *s)
{
int val;
/* Use common layout */
rcc_update_pllsaixcfgr(s, RCC_PLL_PLL);
/* Fetch specific fields for pllcfgr */
/* PLLM */
val = FIELD_EX32(s->pllcfgr, PLLCFGR, PLLM);
clock_mux_set_factor(&s->clock_muxes[RCC_CLOCK_MUX_PLL_INPUT], 1, (val + 1));
/* PLLSRC */
val = FIELD_EX32(s->pllcfgr, PLLCFGR, PLLSRC);
if (val == 0) {
clock_mux_set_enable(&s->clock_muxes[RCC_CLOCK_MUX_PLL_INPUT], false);
} else {
clock_mux_set_source(&s->clock_muxes[RCC_CLOCK_MUX_PLL_INPUT], val - 1);
clock_mux_set_enable(&s->clock_muxes[RCC_CLOCK_MUX_PLL_INPUT], true);
}
}
static void rcc_update_ccipr(Stm32l4x5RccState *s)
{
#define CCIPR_SET_SOURCE(_peripheral_name) \
clock_mux_set_source(&s->clock_muxes[RCC_CLOCK_MUX_##_peripheral_name], \
FIELD_EX32(s->ccipr, CCIPR, _peripheral_name##SEL))
CCIPR_SET_SOURCE(DFSDM1);
CCIPR_SET_SOURCE(SWPMI1);
CCIPR_SET_SOURCE(ADC);
CCIPR_SET_SOURCE(CLK48);
CCIPR_SET_SOURCE(SAI2);
CCIPR_SET_SOURCE(SAI1);
CCIPR_SET_SOURCE(LPTIM2);
CCIPR_SET_SOURCE(LPTIM1);
CCIPR_SET_SOURCE(I2C3);
CCIPR_SET_SOURCE(I2C2);
CCIPR_SET_SOURCE(I2C1);
CCIPR_SET_SOURCE(LPUART1);
CCIPR_SET_SOURCE(UART5);
CCIPR_SET_SOURCE(UART4);
CCIPR_SET_SOURCE(USART3);
CCIPR_SET_SOURCE(USART2);
CCIPR_SET_SOURCE(USART1);
#undef CCIPR_SET_SOURCE
}
static void rcc_update_bdcr(Stm32l4x5RccState *s)
{
int val;
/* LSCOSEL */
val = FIELD_EX32(s->bdcr, BDCR, LSCOSEL);
clock_mux_set_source(&s->clock_muxes[RCC_CLOCK_MUX_LSCO], val);
val = FIELD_EX32(s->bdcr, BDCR, LSCOEN);
clock_mux_set_enable(&s->clock_muxes[RCC_CLOCK_MUX_LSCO], val);
/* BDRST */
/*
* The documentation is not clear if the RTCEN flag disables the RTC and
* the LCD common mux or if it only affects the RTC.
* As the LCDEN flag exists, we assume here that it only affects the RTC.
*/
val = FIELD_EX32(s->bdcr, BDCR, RTCEN);
clock_mux_set_enable(&s->clock_muxes[RCC_CLOCK_MUX_RTC], val);
/* LCD and RTC share the same clock */
val = FIELD_EX32(s->bdcr, BDCR, RTCSEL);
clock_mux_set_source(&s->clock_muxes[RCC_CLOCK_MUX_LCD_AND_RTC_COMMON], val);
/* LSECSSON */
/* LSEDRV[1:0] */
/* LSEBYP */
/* LSEON: Update LSERDY at the same time */
val = FIELD_EX32(s->bdcr, BDCR, LSEON);
if (val) {
clock_update_hz(s->lse_crystal, LSE_FRQ);
s->bdcr |= R_BDCR_LSERDY_MASK;
if (s->cier & R_CIER_LSERDYIE_MASK) {
s->cifr |= R_CIFR_LSERDYF_MASK;
}
} else {
clock_update(s->lse_crystal, 0);
s->bdcr &= ~R_BDCR_LSERDY_MASK;
}
rcc_update_irq(s);
}
static void rcc_update_csr(Stm32l4x5RccState *s)
{
int val;
/* Reset flags: Not implemented */
/* MSISRANGE: Not implemented after reset */
/* LSION: Update LSIRDY at the same time */
val = FIELD_EX32(s->csr, CSR, LSION);
if (val) {
clock_update_hz(s->lsi_rc, LSI_FRQ);
s->csr |= R_CSR_LSIRDY_MASK;
if (s->cier & R_CIER_LSIRDYIE_MASK) {
s->cifr |= R_CIFR_LSIRDYF_MASK;
}
} else {
/*
* TODO: Handle when the LSI is set independently of LSION.
* E.g. when the LSI is set by the RTC.
* See the reference manual for more details.
*/
clock_update(s->lsi_rc, 0);
s->csr &= ~R_CSR_LSIRDY_MASK;
}
rcc_update_irq(s);
}
static void stm32l4x5_rcc_reset_hold(Object *obj)
{
Stm32l4x5RccState *s = STM32L4X5_RCC(obj);
s->cr = 0x00000063;
/*
* Factory-programmed calibration data
* From the reference manual: 0x10XX 00XX
* Value taken from a real card.
*/
s->icscr = 0x106E0082;
s->cfgr = 0x0;
s->pllcfgr = 0x00001000;
s->pllsai1cfgr = 0x00001000;
s->pllsai2cfgr = 0x00001000;
s->cier = 0x0;
s->cifr = 0x0;
s->ahb1rstr = 0x0;
s->ahb2rstr = 0x0;
s->ahb3rstr = 0x0;
s->apb1rstr1 = 0x0;
s->apb1rstr2 = 0x0;
s->apb2rstr = 0x0;
s->ahb1enr = 0x00000100;
s->ahb2enr = 0x0;
s->ahb3enr = 0x0;
s->apb1enr1 = 0x0;
s->apb1enr2 = 0x0;
s->apb2enr = 0x0;
s->ahb1smenr = 0x00011303;
s->ahb2smenr = 0x000532FF;
s->ahb3smenr = 0x00000101;
s->apb1smenr1 = 0xF2FECA3F;
s->apb1smenr2 = 0x00000025;
s->apb2smenr = 0x01677C01;
s->ccipr = 0x0;
s->bdcr = 0x0;
s->csr = 0x0C000600;
}
static uint64_t stm32l4x5_rcc_read(void *opaque, hwaddr addr,
unsigned int size)
{
Stm32l4x5RccState *s = opaque;
uint64_t retvalue = 0;
switch (addr) {
case A_CR:
retvalue = s->cr;
break;
case A_ICSCR:
retvalue = s->icscr;
break;
case A_CFGR:
retvalue = s->cfgr;
break;
case A_PLLCFGR:
retvalue = s->pllcfgr;
break;
case A_PLLSAI1CFGR:
retvalue = s->pllsai1cfgr;
break;
case A_PLLSAI2CFGR:
retvalue = s->pllsai2cfgr;
break;
case A_CIER:
retvalue = s->cier;
break;
case A_CIFR:
retvalue = s->cifr;
break;
case A_CICR:
/* CICR is write only, return the reset value = 0 */
break;
case A_AHB1RSTR:
retvalue = s->ahb1rstr;
break;
case A_AHB2RSTR:
retvalue = s->ahb2rstr;
break;
case A_AHB3RSTR:
retvalue = s->ahb3rstr;
break;
case A_APB1RSTR1:
retvalue = s->apb1rstr1;
break;
case A_APB1RSTR2:
retvalue = s->apb1rstr2;
break;
case A_APB2RSTR:
retvalue = s->apb2rstr;
break;
case A_AHB1ENR:
retvalue = s->ahb1enr;
break;
case A_AHB2ENR:
retvalue = s->ahb2enr;
break;
case A_AHB3ENR:
retvalue = s->ahb3enr;
break;
case A_APB1ENR1:
retvalue = s->apb1enr1;
break;
case A_APB1ENR2:
retvalue = s->apb1enr2;
break;
case A_APB2ENR:
retvalue = s->apb2enr;
break;
case A_AHB1SMENR:
retvalue = s->ahb1smenr;
break;
case A_AHB2SMENR:
retvalue = s->ahb2smenr;
break;
case A_AHB3SMENR:
retvalue = s->ahb3smenr;
break;
case A_APB1SMENR1:
retvalue = s->apb1smenr1;
break;
case A_APB1SMENR2:
retvalue = s->apb1smenr2;
break;
case A_APB2SMENR:
retvalue = s->apb2smenr;
break;
case A_CCIPR:
retvalue = s->ccipr;
break;
case A_BDCR:
retvalue = s->bdcr;
break;
case A_CSR:
retvalue = s->csr;
break;
default:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, addr);
break;
}
trace_stm32l4x5_rcc_read(addr, retvalue);
return retvalue;
}
static void stm32l4x5_rcc_write(void *opaque, hwaddr addr,
uint64_t val64, unsigned int size)
{
Stm32l4x5RccState *s = opaque;
uint32_t previous_value = 0;
const uint32_t value = val64;
trace_stm32l4x5_rcc_write(addr, value);
switch (addr) {
case A_CR:
previous_value = s->cr;
s->cr = (s->cr & CR_READ_SET_MASK) |
(value & (CR_READ_SET_MASK | ~CR_READ_ONLY_MASK));
rcc_update_cr_register(s, previous_value);
break;
case A_ICSCR:
s->icscr = value & ~ICSCR_READ_ONLY_MASK;
qemu_log_mask(LOG_UNIMP,
"%s: Side-effects not implemented for ICSCR\n", __func__);
break;
case A_CFGR:
s->cfgr = value & ~CFGR_READ_ONLY_MASK;
rcc_update_cfgr_register(s);
break;
case A_PLLCFGR:
s->pllcfgr = value;
rcc_update_pllcfgr(s);
break;
case A_PLLSAI1CFGR:
s->pllsai1cfgr = value;
rcc_update_pllsaixcfgr(s, RCC_PLL_PLLSAI1);
break;
case A_PLLSAI2CFGR:
s->pllsai2cfgr = value;
rcc_update_pllsaixcfgr(s, RCC_PLL_PLLSAI2);
break;
case A_CIER:
s->cier = value;
qemu_log_mask(LOG_UNIMP,
"%s: Side-effects not implemented for CIER\n", __func__);
break;
case A_CIFR:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Write attempt into read-only register (CIFR) 0x%"PRIx32"\n",
__func__, value);
break;
case A_CICR:
/* Clear interrupt flags by writing a 1 to the CICR register */
s->cifr &= ~value;
rcc_update_irq(s);
break;
/* Reset behaviors are not implemented */
case A_AHB1RSTR:
s->ahb1rstr = value;
qemu_log_mask(LOG_UNIMP,
"%s: Side-effects not implemented for AHB1RSTR\n", __func__);
break;
case A_AHB2RSTR:
s->ahb2rstr = value;
qemu_log_mask(LOG_UNIMP,
"%s: Side-effects not implemented for AHB2RSTR\n", __func__);
break;
case A_AHB3RSTR:
s->ahb3rstr = value;
qemu_log_mask(LOG_UNIMP,
"%s: Side-effects not implemented for AHB3RSTR\n", __func__);
break;
case A_APB1RSTR1:
s->apb1rstr1 = value;
qemu_log_mask(LOG_UNIMP,
"%s: Side-effects not implemented for APB1RSTR1\n", __func__);
break;
case A_APB1RSTR2:
s->apb1rstr2 = value;
qemu_log_mask(LOG_UNIMP,
"%s: Side-effects not implemented for APB1RSTR2\n", __func__);
break;
case A_APB2RSTR:
s->apb2rstr = value;
qemu_log_mask(LOG_UNIMP,
"%s: Side-effects not implemented for APB2RSTR\n", __func__);
break;
case A_AHB1ENR:
s->ahb1enr = value;
rcc_update_ahb1enr(s);
break;
case A_AHB2ENR:
s->ahb2enr = value;
rcc_update_ahb2enr(s);
break;
case A_AHB3ENR:
s->ahb3enr = value;
rcc_update_ahb3enr(s);
break;
case A_APB1ENR1:
s->apb1enr1 = value;
rcc_update_apb1enr(s);
break;
case A_APB1ENR2:
s->apb1enr2 = value;
rcc_update_apb1enr(s);
break;
case A_APB2ENR:
s->apb2enr = (s->apb2enr & APB2ENR_READ_SET_MASK) | value;
rcc_update_apb2enr(s);
break;
/* Behaviors for Sleep and Stop modes are not implemented */
case A_AHB1SMENR:
s->ahb1smenr = value;
qemu_log_mask(LOG_UNIMP,
"%s: Side-effects not implemented for AHB1SMENR\n", __func__);
break;
case A_AHB2SMENR:
s->ahb2smenr = value;
qemu_log_mask(LOG_UNIMP,
"%s: Side-effects not implemented for AHB2SMENR\n", __func__);
break;
case A_AHB3SMENR:
s->ahb3smenr = value;
qemu_log_mask(LOG_UNIMP,
"%s: Side-effects not implemented for AHB3SMENR\n", __func__);
break;
case A_APB1SMENR1:
s->apb1smenr1 = value;
qemu_log_mask(LOG_UNIMP,
"%s: Side-effects not implemented for APB1SMENR1\n", __func__);
break;
case A_APB1SMENR2:
s->apb1smenr2 = value;
qemu_log_mask(LOG_UNIMP,
"%s: Side-effects not implemented for APB1SMENR2\n", __func__);
break;
case A_APB2SMENR:
s->apb2smenr = value;
qemu_log_mask(LOG_UNIMP,
"%s: Side-effects not implemented for APB2SMENR\n", __func__);
break;
case A_CCIPR:
s->ccipr = value;
rcc_update_ccipr(s);
break;
case A_BDCR:
s->bdcr = value & ~BDCR_READ_ONLY_MASK;
rcc_update_bdcr(s);
break;
case A_CSR:
s->csr = value & ~CSR_READ_ONLY_MASK;
rcc_update_csr(s);
break;
default:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, addr);
}
}
static const MemoryRegionOps stm32l4x5_rcc_ops = {
.read = stm32l4x5_rcc_read,
.write = stm32l4x5_rcc_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.max_access_size = 4,
.min_access_size = 4,
.unaligned = false
},
.impl = {
.max_access_size = 4,
.min_access_size = 4,
.unaligned = false
},
};
static const ClockPortInitArray stm32l4x5_rcc_clocks = {
QDEV_CLOCK_IN(Stm32l4x5RccState, hsi16_rc, NULL, 0),
QDEV_CLOCK_IN(Stm32l4x5RccState, msi_rc, NULL, 0),
QDEV_CLOCK_IN(Stm32l4x5RccState, hse, NULL, 0),
QDEV_CLOCK_IN(Stm32l4x5RccState, lsi_rc, NULL, 0),
QDEV_CLOCK_IN(Stm32l4x5RccState, lse_crystal, NULL, 0),
QDEV_CLOCK_IN(Stm32l4x5RccState, sai1_extclk, NULL, 0),
QDEV_CLOCK_IN(Stm32l4x5RccState, sai2_extclk, NULL, 0),
QDEV_CLOCK_END
};
static void stm32l4x5_rcc_init(Object *obj)
{
Stm32l4x5RccState *s = STM32L4X5_RCC(obj);
size_t i;
sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq);
memory_region_init_io(&s->mmio, obj, &stm32l4x5_rcc_ops, s,
TYPE_STM32L4X5_RCC, 0x400);
sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
qdev_init_clocks(DEVICE(s), stm32l4x5_rcc_clocks);
for (i = 0; i < RCC_NUM_PLL; i++) {
object_initialize_child(obj, PLL_INIT_INFO[i].name,
&s->plls[i], TYPE_RCC_PLL);
set_pll_init_info(&s->plls[i], i);
}
for (i = 0; i < RCC_NUM_CLOCK_MUX; i++) {
char *alias;
object_initialize_child(obj, CLOCK_MUX_INIT_INFO[i].name,
&s->clock_muxes[i],
TYPE_RCC_CLOCK_MUX);
set_clock_mux_init_info(&s->clock_muxes[i], i);
if (!CLOCK_MUX_INIT_INFO[i].hidden) {
/* Expose muxes output as RCC outputs */
alias = g_strdup_printf("%s-out", CLOCK_MUX_INIT_INFO[i].name);
qdev_alias_clock(DEVICE(&s->clock_muxes[i]), "out", DEVICE(obj), alias);
g_free(alias);
}
}
s->gnd = clock_new(obj, "gnd");
}
static void connect_mux_sources(Stm32l4x5RccState *s,
RccClockMuxState *mux,
const RccClockMuxSource *clk_mapping)
{
size_t i;
Clock * const CLK_SRC_MAPPING[] = {
[RCC_CLOCK_MUX_SRC_GND] = s->gnd,
[RCC_CLOCK_MUX_SRC_HSI] = s->hsi16_rc,
[RCC_CLOCK_MUX_SRC_HSE] = s->hse,
[RCC_CLOCK_MUX_SRC_MSI] = s->msi_rc,
[RCC_CLOCK_MUX_SRC_LSI] = s->lsi_rc,
[RCC_CLOCK_MUX_SRC_LSE] = s->lse_crystal,
[RCC_CLOCK_MUX_SRC_SAI1_EXTCLK] = s->sai1_extclk,
[RCC_CLOCK_MUX_SRC_SAI2_EXTCLK] = s->sai2_extclk,
[RCC_CLOCK_MUX_SRC_PLL] =
s->plls[RCC_PLL_PLL].channels[RCC_PLL_CHANNEL_PLLCLK],
[RCC_CLOCK_MUX_SRC_PLLSAI1] =
s->plls[RCC_PLL_PLLSAI1].channels[RCC_PLLSAI1_CHANNEL_PLLSAI1CLK],
[RCC_CLOCK_MUX_SRC_PLLSAI2] =
s->plls[RCC_PLL_PLLSAI2].channels[RCC_PLLSAI2_CHANNEL_PLLSAI2CLK],
[RCC_CLOCK_MUX_SRC_PLLSAI3] =
s->plls[RCC_PLL_PLL].channels[RCC_PLL_CHANNEL_PLLSAI3CLK],
[RCC_CLOCK_MUX_SRC_PLL48M1] =
s->plls[RCC_PLL_PLL].channels[RCC_PLL_CHANNEL_PLL48M1CLK],
[RCC_CLOCK_MUX_SRC_PLL48M2] =
s->plls[RCC_PLL_PLLSAI1].channels[RCC_PLLSAI1_CHANNEL_PLL48M2CLK],
[RCC_CLOCK_MUX_SRC_PLLADC1] =
s->plls[RCC_PLL_PLLSAI1].channels[RCC_PLLSAI1_CHANNEL_PLLADC1CLK],
[RCC_CLOCK_MUX_SRC_PLLADC2] =
s->plls[RCC_PLL_PLLSAI2] .channels[RCC_PLLSAI2_CHANNEL_PLLADC2CLK],
[RCC_CLOCK_MUX_SRC_SYSCLK] = s->clock_muxes[RCC_CLOCK_MUX_SYSCLK].out,
[RCC_CLOCK_MUX_SRC_HCLK] = s->clock_muxes[RCC_CLOCK_MUX_HCLK].out,
[RCC_CLOCK_MUX_SRC_PCLK1] = s->clock_muxes[RCC_CLOCK_MUX_PCLK1].out,
[RCC_CLOCK_MUX_SRC_PCLK2] = s->clock_muxes[RCC_CLOCK_MUX_PCLK2].out,
[RCC_CLOCK_MUX_SRC_HSE_OVER_32] = s->clock_muxes[RCC_CLOCK_MUX_HSE_OVER_32].out,
[RCC_CLOCK_MUX_SRC_LCD_AND_RTC_COMMON] =
s->clock_muxes[RCC_CLOCK_MUX_LCD_AND_RTC_COMMON].out,
};
assert(ARRAY_SIZE(CLK_SRC_MAPPING) == RCC_CLOCK_MUX_SRC_NUMBER);
for (i = 0; i < RCC_NUM_CLOCK_MUX_SRC; i++) {
RccClockMuxSource mapping = clk_mapping[i];
clock_set_source(mux->srcs[i], CLK_SRC_MAPPING[mapping]);
}
}
static const VMStateDescription vmstate_stm32l4x5_rcc = {
.name = TYPE_STM32L4X5_RCC,
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(cr, Stm32l4x5RccState),
VMSTATE_UINT32(icscr, Stm32l4x5RccState),
VMSTATE_UINT32(cfgr, Stm32l4x5RccState),
VMSTATE_UINT32(pllcfgr, Stm32l4x5RccState),
VMSTATE_UINT32(pllsai1cfgr, Stm32l4x5RccState),
VMSTATE_UINT32(pllsai2cfgr, Stm32l4x5RccState),
VMSTATE_UINT32(cier, Stm32l4x5RccState),
VMSTATE_UINT32(cifr, Stm32l4x5RccState),
VMSTATE_UINT32(ahb1rstr, Stm32l4x5RccState),
VMSTATE_UINT32(ahb2rstr, Stm32l4x5RccState),
VMSTATE_UINT32(ahb3rstr, Stm32l4x5RccState),
VMSTATE_UINT32(apb1rstr1, Stm32l4x5RccState),
VMSTATE_UINT32(apb1rstr2, Stm32l4x5RccState),
VMSTATE_UINT32(apb2rstr, Stm32l4x5RccState),
VMSTATE_UINT32(ahb1enr, Stm32l4x5RccState),
VMSTATE_UINT32(ahb2enr, Stm32l4x5RccState),
VMSTATE_UINT32(ahb3enr, Stm32l4x5RccState),
VMSTATE_UINT32(apb1enr1, Stm32l4x5RccState),
VMSTATE_UINT32(apb1enr2, Stm32l4x5RccState),
VMSTATE_UINT32(apb2enr, Stm32l4x5RccState),
VMSTATE_UINT32(ahb1smenr, Stm32l4x5RccState),
VMSTATE_UINT32(ahb2smenr, Stm32l4x5RccState),
VMSTATE_UINT32(ahb3smenr, Stm32l4x5RccState),
VMSTATE_UINT32(apb1smenr1, Stm32l4x5RccState),
VMSTATE_UINT32(apb1smenr2, Stm32l4x5RccState),
VMSTATE_UINT32(apb2smenr, Stm32l4x5RccState),
VMSTATE_UINT32(ccipr, Stm32l4x5RccState),
VMSTATE_UINT32(bdcr, Stm32l4x5RccState),
VMSTATE_UINT32(csr, Stm32l4x5RccState),
VMSTATE_CLOCK(hsi16_rc, Stm32l4x5RccState),
VMSTATE_CLOCK(msi_rc, Stm32l4x5RccState),
VMSTATE_CLOCK(hse, Stm32l4x5RccState),
VMSTATE_CLOCK(lsi_rc, Stm32l4x5RccState),
VMSTATE_CLOCK(lse_crystal, Stm32l4x5RccState),
VMSTATE_CLOCK(sai1_extclk, Stm32l4x5RccState),
VMSTATE_CLOCK(sai2_extclk, Stm32l4x5RccState),
VMSTATE_END_OF_LIST()
}
};
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) {
error_setg(errp,
"HSE frequency is outside of the allowed [4-48]Mhz range: %" PRIx64 "",
s->hse_frequency);
return;
}
for (i = 0; i < RCC_NUM_PLL; i++) {
RccPllState *pll = &s->plls[i];
clock_set_source(pll->in, s->clock_muxes[RCC_CLOCK_MUX_PLL_INPUT].out);
if (!qdev_realize(DEVICE(pll), NULL, errp)) {
return;
}
}
for (i = 0; i < RCC_NUM_CLOCK_MUX; i++) {
RccClockMuxState *clock_mux = &s->clock_muxes[i];
connect_mux_sources(s, clock_mux, CLOCK_MUX_INIT_INFO[i].src_mapping);
if (!qdev_realize(DEVICE(clock_mux), NULL, errp)) {
return;
}
}
/*
* Start clocks after everything is connected
* to propagate the frequencies along the tree.
*/
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);
}
static Property stm32l4x5_rcc_properties[] = {
DEFINE_PROP_UINT64("hse_frequency", Stm32l4x5RccState,
hse_frequency, HSE_DEFAULT_FRQ),
DEFINE_PROP_UINT64("sai1_extclk_frequency", Stm32l4x5RccState,
sai1_extclk_frequency, 0),
DEFINE_PROP_UINT64("sai2_extclk_frequency", Stm32l4x5RccState,
sai2_extclk_frequency, 0),
DEFINE_PROP_END_OF_LIST(),
};
static void stm32l4x5_rcc_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
ResettableClass *rc = RESETTABLE_CLASS(klass);
assert(ARRAY_SIZE(CLOCK_MUX_INIT_INFO) == RCC_NUM_CLOCK_MUX);
rc->phases.hold = stm32l4x5_rcc_reset_hold;
device_class_set_props(dc, stm32l4x5_rcc_properties);
dc->realize = stm32l4x5_rcc_realize;
dc->vmsd = &vmstate_stm32l4x5_rcc;
}
static const TypeInfo stm32l4x5_rcc_types[] = {
{
.name = TYPE_STM32L4X5_RCC,
.parent = TYPE_SYS_BUS_DEVICE,
.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,
}, {
.name = TYPE_RCC_PLL,
.parent = TYPE_DEVICE,
.instance_size = sizeof(RccPllState),
.instance_init = pll_init,
.class_init = pll_class_init,
}
};
DEFINE_TYPES(stm32l4x5_rcc_types)
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