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hw/gpio: Add BCM2838 GPIO stub 

Signed-off-by: Sergey Kambalin <sergey.kambalin@auriga.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20240226000259.2752893-7-sergey.kambalin@auriga.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Sergey Kambalin 2024-02-25 18:02:24 -06:00 committed by Peter Maydell
parent 96b22ee585
commit 23c82c1daf
3 changed files with 197 additions and 1 deletions
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153
hw/gpio/bcm2838_gpio.c Normal file
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@ -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 <aleksey.lotosh@auriga.com>
*
* 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)

5
hw/gpio/meson.build
View File

@ -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'))

40
include/hw/gpio/bcm2838_gpio.h Normal file
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@ -0,0 +1,40 @@
/*
* 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 <aleksey.lotosh@auriga.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef BCM2838_GPIO_H
#define BCM2838_GPIO_H
#include "hw/sysbus.h"
#include "qom/object.h"
#define TYPE_BCM2838_GPIO "bcm2838-gpio"
OBJECT_DECLARE_SIMPLE_TYPE(BCM2838GpioState, BCM2838_GPIO)
#define BCM2838_GPIO_REGS_SIZE 0x1000
#define BCM2838_GPIO_NUM 58
#define GPIO_PUP_PDN_CNTRL_NUM 4
struct BCM2838GpioState {
SysBusDevice parent_obj;
MemoryRegion iomem;
uint8_t fsel[BCM2838_GPIO_NUM];
uint32_t lev0, lev1;
uint8_t sd_fsel;
qemu_irq out[BCM2838_GPIO_NUM];
uint32_t pup_cntrl_reg[GPIO_PUP_PDN_CNTRL_NUM];
};
#endif