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envelope-from=ines.varhol@telecom-paris.fr; helo=zproxy2.enst.fr X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01, WEIRD_QUOTING=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Signed-off-by: Arnaud Minier Signed-off-by: Inès Varhol --- docs/system/arm/b-l475e-iot01a.rst | 2 +- hw/gpio/Kconfig | 3 + hw/gpio/meson.build | 1 + hw/gpio/stm32l4x5_gpio.c | 520 +++++++++++++++++++++++++++++ hw/gpio/trace-events | 6 + include/hw/gpio/stm32l4x5_gpio.h | 79 +++++ 6 files changed, 610 insertions(+), 1 deletion(-) create mode 100644 hw/gpio/stm32l4x5_gpio.c create mode 100644 include/hw/gpio/stm32l4x5_gpio.h diff --git a/docs/system/arm/b-l475e-iot01a.rst b/docs/system/arm/b-l475e-iot01a.rst index 1a021b306a..fe1143e05e 100644 --- a/docs/system/arm/b-l475e-iot01a.rst +++ b/docs/system/arm/b-l475e-iot01a.rst @@ -17,6 +17,7 @@ Currently B-L475E-IOT01A machine's only supports the following devices: - Cortex-M4F based STM32L4x5 SoC - STM32L4x5 EXTI (Extended interrupts and events controller) - STM32L4x5 SYSCFG (System configuration controller) +- STM32L4x5 GPIOs (General-purpose I/Os) Missing devices """"""""""""""" @@ -25,7 +26,6 @@ The B-L475E-IOT01A does *not* support the following devices: - Reset and clock control (RCC) - Serial ports (UART) -- General-purpose I/Os (GPIO) - Analog to Digital Converter (ADC) - SPI controller - Timer controller (TIMER) diff --git a/hw/gpio/Kconfig b/hw/gpio/Kconfig index d2cf3accc8..712940b8e0 100644 --- a/hw/gpio/Kconfig +++ b/hw/gpio/Kconfig @@ -16,3 +16,6 @@ config GPIO_PWR config SIFIVE_GPIO bool + +config STM32L4X5_GPIO + bool diff --git a/hw/gpio/meson.build b/hw/gpio/meson.build index 066ea96480..8470ca1639 100644 --- a/hw/gpio/meson.build +++ b/hw/gpio/meson.build @@ -9,6 +9,7 @@ system_ss.add(when: 'CONFIG_IMX', if_true: files('imx_gpio.c')) system_ss.add(when: 'CONFIG_NPCM7XX', if_true: files('npcm7xx_gpio.c')) system_ss.add(when: 'CONFIG_NRF51_SOC', if_true: files('nrf51_gpio.c')) system_ss.add(when: 'CONFIG_OMAP', if_true: files('omap_gpio.c')) +system_ss.add(when: 'CONFIG_STM32L4X5_SOC', if_true: files('stm32l4x5_gpio.c')) system_ss.add(when: 'CONFIG_RASPI', if_true: files('bcm2835_gpio.c')) system_ss.add(when: 'CONFIG_ASPEED_SOC', if_true: files('aspeed_gpio.c')) system_ss.add(when: 'CONFIG_SIFIVE_GPIO', if_true: files('sifive_gpio.c')) diff --git a/hw/gpio/stm32l4x5_gpio.c b/hw/gpio/stm32l4x5_gpio.c new file mode 100644 index 0000000000..2199d12c76 --- /dev/null +++ b/hw/gpio/stm32l4x5_gpio.c @@ -0,0 +1,520 @@ +/* + * STM32L4x5 GPIO (General Purpose Input/Ouput) + * + * Copyright (c) 2023 Arnaud Minier + * Copyright (c) 2023 Inès Varhol + * + * 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. + * https://www.st.com/en/microcontrollers-microprocessors/stm32l4x5/documentation.html + */ + +#include "qemu/osdep.h" +#include "qemu/log.h" +#include "hw/gpio/stm32l4x5_gpio.h" +#include "hw/irq.h" +#include "migration/vmstate.h" +#include "trace.h" + +#define GPIO_MODER 0x00 +#define GPIO_OTYPER 0x04 +#define GPIO_OSPEEDR 0x08 +#define GPIO_PUPDR 0x0C +#define GPIO_IDR 0x10 +#define GPIO_ODR 0x14 +#define GPIO_BSRR 0x18 +#define GPIO_LCKR 0x1C +#define GPIO_AFRL 0x20 +#define GPIO_AFRH 0x24 +#define GPIO_BRR 0x28 +#define GPIO_ASCR 0x2C +/* + * DISCONNECTED_PINS isn't actually a GPIO register. + * It exists to ensure that : + * - push-pull output pins can't be set externally + * - open-drain output pins can only be externally set to 0 + * + * This field is accessed for test purposes. + */ +#define GPIO_DISCONNECTED_PINS 0x30 + +/* 0b11111111_11111111_00000000_00000000 */ +#define RESERVED_BITS_MASK 0xFFFF0000 + +static void update_gpio_idr(Stm32l4x5GpioState *s); + +static void stm32l4x5_gpio_reset_hold(Object *obj) +{ + Stm32l4x5GpioState *s = STM32L4X5_GPIO(obj); + Stm32l4x5GpioClass *sc = STM32L4X5_GPIO_GET_CLASS(obj); + + s->moder = sc->moder_reset; + s->otyper = 0x00000000; + s->ospeedr = sc->ospeedr_reset; + s->pupdr = sc->pupdr_reset; + s->idr = 0x00000000; + s->odr = 0x00000000; + s->lckr = 0x00000000; + s->afrl = 0x00000000; + s->afrh = 0x00000000; + s->ascr = 0x00000000; + + s->disconnected_pins = 0xFFFF; + s->pins_connected_high = 0x0000; + update_gpio_idr(s); +} + +static void stm32l4x5_gpio_set(void *opaque, int line, int level) +{ + Stm32l4x5GpioState *s = opaque; + /* + * The pin isn't set if line is configured in output mode + * except if level is 0 and the output is open-drain. + * This way there will be no short-circuit prone situations. + */ + if ((extract32(s->moder, 2 * line, 2) == 1) && + !((extract32(s->otyper, line, 1) == 1) && + (level == 0))) { + qemu_log_mask(LOG_GUEST_ERROR, "Line %d can't be driven externally\n", + line); + return; + } + + s->disconnected_pins &= ~(1 << line); + if (level) { + s->pins_connected_high |= (1 << line); + } else { + s->pins_connected_high &= ~(1 << line); + } + trace_stm32l4x5_gpio_pins(s->disconnected_pins, + s->pins_connected_high); + update_gpio_idr(s); +} + + +static void update_gpio_idr(Stm32l4x5GpioState *s) +{ + uint32_t new_idr_mask = 0; + uint32_t new_idr = s->odr; + + for (int i = 0; i < 16; i++) { + /* output mode */ + if (extract32(s->moder, 2 * i, 2) == 1) { + if (extract32(s->otyper, i, 1) == 0) { + /* push-pull */ + new_idr_mask |= (1 << i); + } else if (!(s->odr & (1 << i))) { + /* open-drain ODR 0 */ + new_idr_mask |= (1 << i); + } else if ((s->disconnected_pins & (1 << i)) && + (extract32(s->pupdr, 2 * i, 2) == 1)) { + /* open-drain pull-up ODR 1 with floating pin */ + new_idr_mask |= (1 << i); + } else if ((s->disconnected_pins & (1 << i)) && + (extract32(s->pupdr, 2 * i, 2) == 2)) { + /* open-drain pull-down ODR 1 with floating pin */ + new_idr_mask |= (1 << i); + new_idr &= ~(1 << i); + } else if (!(s->pins_connected_high & (1 << i))) { + /* open-drain ODR 1 with pin connected low */ + new_idr_mask |= (1 << i); + new_idr &= ~(1 << i); + } else { + /* open-drain ODR 1 with pin connected high */ + assert(false); + } + /* input or analog mode with connected pin */ + } else if (!(s->disconnected_pins & (1 << i))) { + if (s->pins_connected_high & (1 << i)) { + /* pin high */ + new_idr_mask |= (1 << i); + new_idr |= (1 << i); + } else { + /* pin low */ + new_idr_mask |= (1 << i); + new_idr &= ~(1 << i); + } + /* input or analog mode with disconnected pin */ + } else { + if (extract32(s->pupdr, 2 * i, 2) == 1) { + /* pull-up */ + new_idr_mask |= (1 << i); + new_idr |= (1 << i); + } else if (extract32(s->pupdr, 2 * i, 2) == 2) { + /* pull-down */ + new_idr_mask |= (1 << i); + new_idr &= ~(1 << i); + } + } + } + + uint32_t old_idr = s->idr; + s->idr = (old_idr & ~new_idr_mask) | (new_idr & new_idr_mask); + trace_stm32l4x5_gpio_update_idr(old_idr, s->idr); + + for (int i = 0; i < 16; i++) { + if (new_idr_mask & (1 << i)) { + if ((new_idr & (1 << i)) > (old_idr & (1 << i))) { + qemu_irq_raise(s->pin[i]); + } else if ((new_idr & (1 << i)) < (old_idr & (1 << i))) { + qemu_irq_lower(s->pin[i]); + } + } + } +} + +/* + * Return pins both configured in output mode + * and externally driven (except pins in open-drain + * mode externally set to 0). + */ +static uint32_t get_gpio_pins_to_disconnect(Stm32l4x5GpioState *s) +{ + uint32_t pins_to_disconnect = 0; + for (int i = 0; i < 16; i++) { + /* for each connected pin in output mode */ + if ((~s->disconnected_pins & (1 << i)) & + (extract32(s->moder, 2 * i, 2) == 1)) { + /* if either push-pull or high level */ + if ((extract32(s->otyper, i, 1) == 0) || + (extract16(s->pins_connected_high, i, 1)) == 1) { + pins_to_disconnect |= (1 << i); + qemu_log_mask(LOG_GUEST_ERROR, + "Line %d can't be driven externally\n", + i); + } + } + } + return pins_to_disconnect; +} + +/* + * Set field `disconnected_pins` and call `update_gpio_idr()` + */ +static void disconnect_gpio_pins(Stm32l4x5GpioState *s, uint16_t lines) +{ + s->disconnected_pins |= lines; + trace_stm32l4x5_gpio_pins(s->disconnected_pins, + s->pins_connected_high); + update_gpio_idr(s); +} + +static void stm32l4x5_gpio_write(void *opaque, hwaddr addr, + uint64_t val64, unsigned int size) +{ + Stm32l4x5GpioState *s = opaque; + + uint32_t value = val64; + trace_stm32l4x5_gpio_write(addr, val64); + + switch (addr) { + case GPIO_MODER: + s->moder = value; + disconnect_gpio_pins(s, get_gpio_pins_to_disconnect(s)); + qemu_log_mask(LOG_UNIMP, + "%s: Alternate function mode isn't supported\n\ + Setting alternate function mode sets analog mode\n", + __func__); + return; + case GPIO_OTYPER: + s->otyper = value & ~RESERVED_BITS_MASK; + disconnect_gpio_pins(s, get_gpio_pins_to_disconnect(s)); + return; + case GPIO_OSPEEDR: + qemu_log_mask(LOG_UNIMP, + "%s: Changing the I/O output speed isn't supported\n", + __func__); + s->ospeedr = value; + return; + case GPIO_PUPDR: + s->pupdr = value; + update_gpio_idr(s); + return; + case GPIO_IDR: + qemu_log_mask(LOG_UNIMP, + "%s: GPIO->IDR is read-only\n", + __func__); + return; + case GPIO_ODR: + s->odr = value & ~RESERVED_BITS_MASK; + update_gpio_idr(s); + return; + case GPIO_BSRR: { + uint32_t bits_to_reset = (value & RESERVED_BITS_MASK) >> 16; + uint32_t bits_to_set = value & ~RESERVED_BITS_MASK; + /* If both BSx and BRx are set, BSx has priority.*/ + s->odr &= ~bits_to_reset; + s->odr |= bits_to_set; + update_gpio_idr(s); + return; + } + case GPIO_LCKR: + qemu_log_mask(LOG_UNIMP, + "%s: Locking port bits configuration isn't supported\n", + __func__); + s->lckr = value & ~RESERVED_BITS_MASK; + return; + case GPIO_AFRL: + qemu_log_mask(LOG_UNIMP, + "%s: Alternate functions aren't supported\n", + __func__); + s->afrl = value; + return; + case GPIO_AFRH: + qemu_log_mask(LOG_UNIMP, + "%s: Alternate functions aren't supported\n", + __func__); + s->afrh = value; + return; + case GPIO_BRR: { + uint32_t bits_to_reset = value & ~RESERVED_BITS_MASK; + s->odr &= ~bits_to_reset; + update_gpio_idr(s); + return; + } + case GPIO_ASCR: + qemu_log_mask(LOG_UNIMP, + "%s: ADC function isn't supported\n", + __func__); + s->ascr = value & ~RESERVED_BITS_MASK; + return; + /* a tweak to enable the qtest checking disconnected pins */ + case GPIO_DISCONNECTED_PINS: + disconnect_gpio_pins(s, value); + return; + default: + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Bad offset 0x%" HWADDR_PRIx "\n", __func__, addr); + } +} + +static uint64_t stm32l4x5_gpio_read(void *opaque, hwaddr addr, + unsigned int size) +{ + Stm32l4x5GpioState *s = opaque; + + trace_stm32l4x5_gpio_read(addr); + + switch (addr) { + case GPIO_MODER: + return s->moder; + case GPIO_OTYPER: + return s->otyper; + case GPIO_OSPEEDR: + return s->ospeedr; + case GPIO_PUPDR: + return s->pupdr; + case GPIO_IDR: + return s->idr; + case GPIO_ODR: + return s->odr; + case GPIO_BSRR: + return 0; + case GPIO_LCKR: + return s->lckr; + case GPIO_AFRL: + return s->afrl; + case GPIO_AFRH: + return s->afrh; + case GPIO_BRR: + return 0; + case GPIO_ASCR: + return s->ascr; + /* a tweak to enable the qtest checking disconnected pins */ + case GPIO_DISCONNECTED_PINS: + return s->disconnected_pins; + default: + qemu_log_mask(LOG_GUEST_ERROR, + "%s: Bad offset 0x%" HWADDR_PRIx "\n", __func__, addr); + return 0; + } +} + +static const MemoryRegionOps stm32l4x5_gpio_ops = { + .read = stm32l4x5_gpio_read, + .write = stm32l4x5_gpio_write, + .endianness = DEVICE_NATIVE_ENDIAN, + .impl = { + .min_access_size = 4, + .max_access_size = 4, + .unaligned = false, + }, + .valid = { + .min_access_size = 4, + .max_access_size = 4, + .unaligned = false, + }, +}; + +static void stm32l4x5_gpio_init(Object *obj) +{ + Stm32l4x5GpioState *s = STM32L4X5_GPIO(obj); + int i; + + for (i = 0; i < GPIO_NUM_PINS; i++) { + sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->pin[i]); + } + + memory_region_init_io(&s->mmio, obj, &stm32l4x5_gpio_ops, s, + TYPE_STM32L4X5_GPIO, 0x400); + + sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio); + + qdev_init_gpio_out(DEVICE(obj), s->pin, GPIO_NUM_PINS); + qdev_init_gpio_in(DEVICE(obj), stm32l4x5_gpio_set, GPIO_NUM_PINS); +} + +static const VMStateDescription vmstate_stm32l4x5_gpio = { + .name = TYPE_STM32L4X5_GPIO, + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]){ + VMSTATE_UINT32(moder, Stm32l4x5GpioState), + VMSTATE_UINT32(otyper, Stm32l4x5GpioState), + VMSTATE_UINT32(ospeedr, Stm32l4x5GpioState), + VMSTATE_UINT32(pupdr, Stm32l4x5GpioState), + VMSTATE_UINT32(idr, Stm32l4x5GpioState), + VMSTATE_UINT32(odr, Stm32l4x5GpioState), + VMSTATE_UINT32(lckr, Stm32l4x5GpioState), + VMSTATE_UINT32(afrl, Stm32l4x5GpioState), + VMSTATE_UINT32(afrh, Stm32l4x5GpioState), + VMSTATE_UINT32(ascr, Stm32l4x5GpioState), + VMSTATE_UINT16(disconnected_pins, Stm32l4x5GpioState), + VMSTATE_UINT16(pins_connected_high, Stm32l4x5GpioState), + VMSTATE_END_OF_LIST() + } +}; + +static void stm32l4x5_gpio_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + ResettableClass *rc = RESETTABLE_CLASS(klass); + + dc->vmsd = &vmstate_stm32l4x5_gpio; + rc->phases.hold = stm32l4x5_gpio_reset_hold; +} + +static void stm32l4x5_gpio_a_class_init(ObjectClass *klass, void *data) +{ + Stm32l4x5GpioClass *sc = STM32L4X5_GPIO_CLASS(klass); + + sc->moder_reset = 0xABFFFFFF; + sc->ospeedr_reset = 0x0C000000; + sc->pupdr_reset = 0x64000000; +} + +static void stm32l4x5_gpio_b_class_init(ObjectClass *klass, void *data) +{ + Stm32l4x5GpioClass *sc = STM32L4X5_GPIO_CLASS(klass); + + sc->moder_reset = 0xFFFFFEBF; + sc->ospeedr_reset = 0x00000000; + sc->pupdr_reset = 0x00000100; +} + +static void stm32l4x5_gpio_c_class_init(ObjectClass *klass, void *data) +{ + Stm32l4x5GpioClass *sc = STM32L4X5_GPIO_CLASS(klass); + + sc->moder_reset = 0xFFFFFFFF; + sc->ospeedr_reset = 0x00000000; + sc->pupdr_reset = 0x00000000; +} + +static void stm32l4x5_gpio_d_class_init(ObjectClass *klass, void *data) +{ + Stm32l4x5GpioClass *sc = STM32L4X5_GPIO_CLASS(klass); + + sc->moder_reset = 0xFFFFFFFF; + sc->ospeedr_reset = 0x00000000; + sc->pupdr_reset = 0x00000000; +} + +static void stm32l4x5_gpio_e_class_init(ObjectClass *klass, void *data) +{ + Stm32l4x5GpioClass *sc = STM32L4X5_GPIO_CLASS(klass); + + sc->moder_reset = 0xFFFFFFFF; + sc->ospeedr_reset = 0x00000000; + sc->pupdr_reset = 0x00000000; +} + +static void stm32l4x5_gpio_f_class_init(ObjectClass *klass, void *data) +{ + Stm32l4x5GpioClass *sc = STM32L4X5_GPIO_CLASS(klass); + + sc->moder_reset = 0xFFFFFFFF; + sc->ospeedr_reset = 0x00000000; + sc->pupdr_reset = 0x00000000; +} + +static void stm32l4x5_gpio_g_class_init(ObjectClass *klass, void *data) +{ + Stm32l4x5GpioClass *sc = STM32L4X5_GPIO_CLASS(klass); + + sc->moder_reset = 0xFFFFFFFF; + sc->ospeedr_reset = 0x00000000; + sc->pupdr_reset = 0x00000000; +} + +static void stm32l4x5_gpio_h_class_init(ObjectClass *klass, void *data) +{ + Stm32l4x5GpioClass *sc = STM32L4X5_GPIO_CLASS(klass); + + sc->moder_reset = 0x0000000F; + sc->ospeedr_reset = 0x00000000; + sc->pupdr_reset = 0x00000000; +} + +static const TypeInfo stm32l4x5_gpio_types[] = { + { + .name = TYPE_STM32L4X5_GPIO, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(Stm32l4x5GpioState), + .instance_init = stm32l4x5_gpio_init, + .class_size = sizeof(Stm32l4x5GpioClass), + .class_init = stm32l4x5_gpio_class_init, + .abstract = true, + }, { + .name = TYPE_STM32L4X5_GPIO_A, + .parent = TYPE_STM32L4X5_GPIO, + .class_init = stm32l4x5_gpio_a_class_init, + }, { + .name = TYPE_STM32L4X5_GPIO_B, + .parent = TYPE_STM32L4X5_GPIO, + .class_init = stm32l4x5_gpio_b_class_init, + }, { + .name = TYPE_STM32L4X5_GPIO_C, + .parent = TYPE_STM32L4X5_GPIO, + .class_init = stm32l4x5_gpio_c_class_init, + }, { + .name = TYPE_STM32L4X5_GPIO_D, + .parent = TYPE_STM32L4X5_GPIO, + .class_init = stm32l4x5_gpio_d_class_init, + }, { + .name = TYPE_STM32L4X5_GPIO_E, + .parent = TYPE_STM32L4X5_GPIO, + .class_init = stm32l4x5_gpio_e_class_init, + }, { + .name = TYPE_STM32L4X5_GPIO_F, + .parent = TYPE_STM32L4X5_GPIO, + .class_init = stm32l4x5_gpio_f_class_init, + }, { + .name = TYPE_STM32L4X5_GPIO_G, + .parent = TYPE_STM32L4X5_GPIO, + .class_init = stm32l4x5_gpio_g_class_init, + }, { + .name = TYPE_STM32L4X5_GPIO_H, + .parent = TYPE_STM32L4X5_GPIO, + .class_init = stm32l4x5_gpio_h_class_init, + }, +}; + +DEFINE_TYPES(stm32l4x5_gpio_types) diff --git a/hw/gpio/trace-events b/hw/gpio/trace-events index 9736b362ac..8cbf75a897 100644 --- a/hw/gpio/trace-events +++ b/hw/gpio/trace-events @@ -31,3 +31,9 @@ sifive_gpio_update_output_irq(int64_t line, int64_t value) "line %" PRIi64 " val # aspeed_gpio.c aspeed_gpio_read(uint64_t offset, uint64_t value) "offset: 0x%" PRIx64 " value 0x%" PRIx64 aspeed_gpio_write(uint64_t offset, uint64_t value) "offset: 0x%" PRIx64 " value 0x%" PRIx64 + +# stm32l4x5_gpio.c +stm32l4x5_gpio_read(uint64_t addr) "reg read: addr: 0x%" PRIx64 " " +stm32l4x5_gpio_write(uint64_t addr, uint64_t data) "reg write: addr: 0x%" PRIx64 " val: 0x%" PRIx64 "" +stm32l4x5_gpio_update_idr(uint32_t old_idr, uint32_t new_idr) "previous idr: 0x%x new idr: 0x%x" +stm32l4x5_gpio_pins(uint16_t disconnected, uint16_t high) "disconnected pins: 0x%x levels: 0x%x" diff --git a/include/hw/gpio/stm32l4x5_gpio.h b/include/hw/gpio/stm32l4x5_gpio.h new file mode 100644 index 0000000000..7d6c16f6b9 --- /dev/null +++ b/include/hw/gpio/stm32l4x5_gpio.h @@ -0,0 +1,79 @@ +/* + * STM32L4x5 GPIO (General Purpose Input/Ouput) + * + * Copyright (c) 2023 Arnaud Minier + * Copyright (c) 2023 Inès Varhol + * + * 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. + * https://www.st.com/en/microcontrollers-microprocessors/stm32l4x5/documentation.html + */ + +#ifndef HW_STM32L4X5_GPIO_H +#define HW_STM32L4X5_GPIO_H + +#include "hw/sysbus.h" +#include "qom/object.h" + +#define TYPE_STM32L4X5_GPIO "stm32l4x5-gpio" +#define TYPE_STM32L4X5_GPIO_A "stm32l4x5-gpio-a" +#define TYPE_STM32L4X5_GPIO_B "stm32l4x5-gpio-b" +#define TYPE_STM32L4X5_GPIO_C "stm32l4x5-gpio-c" +#define TYPE_STM32L4X5_GPIO_D "stm32l4x5-gpio-d" +#define TYPE_STM32L4X5_GPIO_E "stm32l4x5-gpio-e" +#define TYPE_STM32L4X5_GPIO_F "stm32l4x5-gpio-f" +#define TYPE_STM32L4X5_GPIO_G "stm32l4x5-gpio-g" +#define TYPE_STM32L4X5_GPIO_H "stm32l4x5-gpio-h" +OBJECT_DECLARE_TYPE(Stm32l4x5GpioState, Stm32l4x5GpioClass, STM32L4X5_GPIO) + +#define GPIO_NUM_PINS 16 + +struct Stm32l4x5GpioState { + SysBusDevice parent_obj; + + MemoryRegion mmio; + + /* GPIO registers */ + uint32_t moder; + uint32_t otyper; + uint32_t ospeedr; + uint32_t pupdr; + uint32_t idr; + uint32_t odr; + uint32_t lckr; + uint32_t afrl; + uint32_t afrh; + uint32_t ascr; + + /* + * External driving of pins. + * The pins can be set externally through the device + * anonymous input GPIOs lines under certain conditions. + * The pin must not be in push-pull output mode, + * and can't be set high in open-drain mode. + * Pins driven externally and configured to + * output mode will in general be "disconnected" + * (see `get_gpio_pins_to_disconnect()`) + */ + uint16_t disconnected_pins; + uint16_t pins_connected_high; + + qemu_irq pin[GPIO_NUM_PINS]; +}; + +struct Stm32l4x5GpioClass { + SysBusDeviceClass parent_class; + + uint32_t moder_reset; + uint32_t ospeedr_reset; + uint32_t pupdr_reset; +}; + +#endif