From 23c82c1daf30b3ed8d988f3f1d7fbb0557059ac6 Mon Sep 17 00:00:00 2001 From: Sergey Kambalin Date: Sun, 25 Feb 2024 18:02:24 -0600 Subject: hw/gpio: Add BCM2838 GPIO stub Signed-off-by: Sergey Kambalin Reviewed-by: Peter Maydell Message-id: 20240226000259.2752893-7-sergey.kambalin@auriga.com Signed-off-by: Peter Maydell --- hw/gpio/bcm2838_gpio.c | 153 +++++++++++++++++++++++++++++++++++++++++++++++++ hw/gpio/meson.build | 5 +- 2 files changed, 157 insertions(+), 1 deletion(-) create mode 100644 hw/gpio/bcm2838_gpio.c (limited to 'hw/gpio') diff --git a/hw/gpio/bcm2838_gpio.c b/hw/gpio/bcm2838_gpio.c new file mode 100644 index 0000000..a312490 --- /dev/null +++ b/hw/gpio/bcm2838_gpio.c @@ -0,0 +1,153 @@ +/* + * Raspberry Pi (BCM2838) GPIO Controller + * This implementation is based on bcm2835_gpio (hw/gpio/bcm2835_gpio.c) + * + * Copyright (c) 2022 Auriga LLC + * + * Authors: + * Lotosh, Aleksey + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "qemu/osdep.h" +#include "qemu/log.h" +#include "qemu/module.h" +#include "qemu/timer.h" +#include "qapi/error.h" +#include "hw/sysbus.h" +#include "migration/vmstate.h" +#include "hw/gpio/bcm2838_gpio.h" + +#define GPFSEL0 0x00 +#define GPFSEL1 0x04 +#define GPFSEL2 0x08 +#define GPFSEL3 0x0C +#define GPFSEL4 0x10 +#define GPFSEL5 0x14 +#define GPSET0 0x1C +#define GPSET1 0x20 +#define GPCLR0 0x28 +#define GPCLR1 0x2C +#define GPLEV0 0x34 +#define GPLEV1 0x38 +#define GPEDS0 0x40 +#define GPEDS1 0x44 +#define GPREN0 0x4C +#define GPREN1 0x50 +#define GPFEN0 0x58 +#define GPFEN1 0x5C +#define GPHEN0 0x64 +#define GPHEN1 0x68 +#define GPLEN0 0x70 +#define GPLEN1 0x74 +#define GPAREN0 0x7C +#define GPAREN1 0x80 +#define GPAFEN0 0x88 +#define GPAFEN1 0x8C + +#define GPIO_PUP_PDN_CNTRL_REG0 0xE4 +#define GPIO_PUP_PDN_CNTRL_REG1 0xE8 +#define GPIO_PUP_PDN_CNTRL_REG2 0xEC +#define GPIO_PUP_PDN_CNTRL_REG3 0xF0 + +#define RESET_VAL_CNTRL_REG0 0xAAA95555 +#define RESET_VAL_CNTRL_REG1 0xA0AAAAAA +#define RESET_VAL_CNTRL_REG2 0x50AAA95A +#define RESET_VAL_CNTRL_REG3 0x00055555 + +#define BYTES_IN_WORD 4 + +static uint64_t bcm2838_gpio_read(void *opaque, hwaddr offset, unsigned size) +{ + uint64_t value = 0; + + qemu_log_mask(LOG_UNIMP, "%s: %s: not implemented for %"HWADDR_PRIx"\n", + TYPE_BCM2838_GPIO, __func__, offset); + + return value; +} + +static void bcm2838_gpio_write(void *opaque, hwaddr offset, uint64_t value, + unsigned size) +{ + qemu_log_mask(LOG_UNIMP, "%s: %s: not implemented for %"HWADDR_PRIx"\n", + TYPE_BCM2838_GPIO, __func__, offset); +} + +static void bcm2838_gpio_reset(DeviceState *dev) +{ + BCM2838GpioState *s = BCM2838_GPIO(dev); + + s->lev0 = 0; + s->lev1 = 0; + + memset(s->fsel, 0, sizeof(s->fsel)); + + s->pup_cntrl_reg[0] = RESET_VAL_CNTRL_REG0; + s->pup_cntrl_reg[1] = RESET_VAL_CNTRL_REG1; + s->pup_cntrl_reg[2] = RESET_VAL_CNTRL_REG2; + s->pup_cntrl_reg[3] = RESET_VAL_CNTRL_REG3; +} + +static const MemoryRegionOps bcm2838_gpio_ops = { + .read = bcm2838_gpio_read, + .write = bcm2838_gpio_write, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +static const VMStateDescription vmstate_bcm2838_gpio = { + .name = "bcm2838_gpio", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT8_ARRAY(fsel, BCM2838GpioState, BCM2838_GPIO_NUM), + VMSTATE_UINT32(lev0, BCM2838GpioState), + VMSTATE_UINT32(lev1, BCM2838GpioState), + VMSTATE_UINT8(sd_fsel, BCM2838GpioState), + VMSTATE_UINT32_ARRAY(pup_cntrl_reg, BCM2838GpioState, + GPIO_PUP_PDN_CNTRL_NUM), + VMSTATE_END_OF_LIST() + } +}; + +static void bcm2838_gpio_init(Object *obj) +{ + BCM2838GpioState *s = BCM2838_GPIO(obj); + DeviceState *dev = DEVICE(obj); + SysBusDevice *sbd = SYS_BUS_DEVICE(obj); + + memory_region_init_io(&s->iomem, obj, &bcm2838_gpio_ops, s, + "bcm2838_gpio", BCM2838_GPIO_REGS_SIZE); + sysbus_init_mmio(sbd, &s->iomem); + qdev_init_gpio_out(dev, s->out, BCM2838_GPIO_NUM); +} + +static void bcm2838_gpio_realize(DeviceState *dev, Error **errp) +{ + /* Temporary stub. Do nothing */ +} + +static void bcm2838_gpio_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->vmsd = &vmstate_bcm2838_gpio; + dc->realize = &bcm2838_gpio_realize; + dc->reset = &bcm2838_gpio_reset; +} + +static const TypeInfo bcm2838_gpio_info = { + .name = TYPE_BCM2838_GPIO, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(BCM2838GpioState), + .instance_init = bcm2838_gpio_init, + .class_init = bcm2838_gpio_class_init, +}; + +static void bcm2838_gpio_register_types(void) +{ + type_register_static(&bcm2838_gpio_info); +} + +type_init(bcm2838_gpio_register_types) diff --git a/hw/gpio/meson.build b/hw/gpio/meson.build index 066ea96..8a8d03d 100644 --- a/hw/gpio/meson.build +++ b/hw/gpio/meson.build @@ -9,6 +9,9 @@ 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_RASPI', if_true: files('bcm2835_gpio.c')) +system_ss.add(when: 'CONFIG_RASPI', if_true: files( + 'bcm2835_gpio.c', + 'bcm2838_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')) -- cgit v1.1