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xemu/hw/avr/atmega.c
Philippe Mathieu-Daudé 74fb2f4f4c hw/avr: Realize AVRCPU qdev object using qdev_realize() 
TYPE_AVR_CPU inherits TYPE_CPU, which itself inherits TYPE_DEVICE.
TYPE_DEVICE instances are realized using qdev_realize(), we don't
need to access QOM internal values.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Michael Rolnik <mrolnik@gmail.com>
Message-Id: <20211205224109.322152-1-f4bug@amsat.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-12-17 10:43:24 +01:00

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/*
* QEMU ATmega MCU
*
* Copyright (c) 2019-2020 Philippe Mathieu-Daudé
*
* This work is licensed under the terms of the GNU GPLv2 or later.
* See the COPYING file in the top-level directory.
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "qemu/module.h"
#include "qemu/units.h"
#include "qapi/error.h"
#include "exec/memory.h"
#include "exec/address-spaces.h"
#include "sysemu/sysemu.h"
#include "hw/qdev-properties.h"
#include "hw/sysbus.h"
#include "qom/object.h"
#include "hw/misc/unimp.h"
#include "atmega.h"
enum AtmegaPeripheral {
POWER0, POWER1,
GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, GPIOF,
GPIOG, GPIOH, GPIOI, GPIOJ, GPIOK, GPIOL,
USART0, USART1, USART2, USART3,
TIMER0, TIMER1, TIMER2, TIMER3, TIMER4, TIMER5,
PERIFMAX
};
#define GPIO(n) (n + GPIOA)
#define USART(n) (n + USART0)
#define TIMER(n) (n + TIMER0)
#define POWER(n) (n + POWER0)
typedef struct {
uint16_t addr;
enum AtmegaPeripheral power_index;
uint8_t power_bit;
/* timer specific */
uint16_t intmask_addr;
uint16_t intflag_addr;
bool is_timer16;
} peripheral_cfg;
struct AtmegaMcuClass {
/*< private >*/
SysBusDeviceClass parent_class;
/*< public >*/
const char *uc_name;
const char *cpu_type;
size_t flash_size;
size_t eeprom_size;
size_t sram_size;
size_t io_size;
size_t gpio_count;
size_t adc_count;
const uint8_t *irq;
const peripheral_cfg *dev;
};
typedef struct AtmegaMcuClass AtmegaMcuClass;
DECLARE_CLASS_CHECKERS(AtmegaMcuClass, ATMEGA_MCU,
TYPE_ATMEGA_MCU)
static const peripheral_cfg dev168_328[PERIFMAX] = {
[USART0] = { 0xc0, POWER0, 1 },
[TIMER2] = { 0xb0, POWER0, 6, 0x70, 0x37, false },
[TIMER1] = { 0x80, POWER0, 3, 0x6f, 0x36, true },
[POWER0] = { 0x64 },
[TIMER0] = { 0x44, POWER0, 5, 0x6e, 0x35, false },
[GPIOD] = { 0x29 },
[GPIOC] = { 0x26 },
[GPIOB] = { 0x23 },
}, dev1280_2560[PERIFMAX] = {
[USART3] = { 0x130, POWER1, 2 },
[TIMER5] = { 0x120, POWER1, 5, 0x73, 0x3a, true },
[GPIOL] = { 0x109 },
[GPIOK] = { 0x106 },
[GPIOJ] = { 0x103 },
[GPIOH] = { 0x100 },
[USART2] = { 0xd0, POWER1, 1 },
[USART1] = { 0xc8, POWER1, 0 },
[USART0] = { 0xc0, POWER0, 1 },
[TIMER2] = { 0xb0, POWER0, 6, 0x70, 0x37, false }, /* TODO async */
[TIMER4] = { 0xa0, POWER1, 4, 0x72, 0x39, true },
[TIMER3] = { 0x90, POWER1, 3, 0x71, 0x38, true },
[TIMER1] = { 0x80, POWER0, 3, 0x6f, 0x36, true },
[POWER1] = { 0x65 },
[POWER0] = { 0x64 },
[TIMER0] = { 0x44, POWER0, 5, 0x6e, 0x35, false },
[GPIOG] = { 0x32 },
[GPIOF] = { 0x2f },
[GPIOE] = { 0x2c },
[GPIOD] = { 0x29 },
[GPIOC] = { 0x26 },
[GPIOB] = { 0x23 },
[GPIOA] = { 0x20 },
};
enum AtmegaIrq {
USART0_RXC_IRQ, USART0_DRE_IRQ, USART0_TXC_IRQ,
USART1_RXC_IRQ, USART1_DRE_IRQ, USART1_TXC_IRQ,
USART2_RXC_IRQ, USART2_DRE_IRQ, USART2_TXC_IRQ,
USART3_RXC_IRQ, USART3_DRE_IRQ, USART3_TXC_IRQ,
TIMER0_CAPT_IRQ, TIMER0_COMPA_IRQ, TIMER0_COMPB_IRQ,
TIMER0_COMPC_IRQ, TIMER0_OVF_IRQ,
TIMER1_CAPT_IRQ, TIMER1_COMPA_IRQ, TIMER1_COMPB_IRQ,
TIMER1_COMPC_IRQ, TIMER1_OVF_IRQ,
TIMER2_CAPT_IRQ, TIMER2_COMPA_IRQ, TIMER2_COMPB_IRQ,
TIMER2_COMPC_IRQ, TIMER2_OVF_IRQ,
TIMER3_CAPT_IRQ, TIMER3_COMPA_IRQ, TIMER3_COMPB_IRQ,
TIMER3_COMPC_IRQ, TIMER3_OVF_IRQ,
TIMER4_CAPT_IRQ, TIMER4_COMPA_IRQ, TIMER4_COMPB_IRQ,
TIMER4_COMPC_IRQ, TIMER4_OVF_IRQ,
TIMER5_CAPT_IRQ, TIMER5_COMPA_IRQ, TIMER5_COMPB_IRQ,
TIMER5_COMPC_IRQ, TIMER5_OVF_IRQ,
IRQ_COUNT
};
#define USART_IRQ_COUNT 3
#define USART_RXC_IRQ(n) (n * USART_IRQ_COUNT + USART0_RXC_IRQ)
#define USART_DRE_IRQ(n) (n * USART_IRQ_COUNT + USART0_DRE_IRQ)
#define USART_TXC_IRQ(n) (n * USART_IRQ_COUNT + USART0_TXC_IRQ)
#define TIMER_IRQ_COUNT 5
#define TIMER_CAPT_IRQ(n) (n * TIMER_IRQ_COUNT + TIMER0_CAPT_IRQ)
#define TIMER_COMPA_IRQ(n) (n * TIMER_IRQ_COUNT + TIMER0_COMPA_IRQ)
#define TIMER_COMPB_IRQ(n) (n * TIMER_IRQ_COUNT + TIMER0_COMPB_IRQ)
#define TIMER_COMPC_IRQ(n) (n * TIMER_IRQ_COUNT + TIMER0_COMPC_IRQ)
#define TIMER_OVF_IRQ(n) (n * TIMER_IRQ_COUNT + TIMER0_OVF_IRQ)
static const uint8_t irq168_328[IRQ_COUNT] = {
[TIMER2_COMPA_IRQ] = 8,
[TIMER2_COMPB_IRQ] = 9,
[TIMER2_OVF_IRQ] = 10,
[TIMER1_CAPT_IRQ] = 11,
[TIMER1_COMPA_IRQ] = 12,
[TIMER1_COMPB_IRQ] = 13,
[TIMER1_OVF_IRQ] = 14,
[TIMER0_COMPA_IRQ] = 15,
[TIMER0_COMPB_IRQ] = 16,
[TIMER0_OVF_IRQ] = 17,
[USART0_RXC_IRQ] = 19,
[USART0_DRE_IRQ] = 20,
[USART0_TXC_IRQ] = 21,
}, irq1280_2560[IRQ_COUNT] = {
[TIMER2_COMPA_IRQ] = 14,
[TIMER2_COMPB_IRQ] = 15,
[TIMER2_OVF_IRQ] = 16,
[TIMER1_CAPT_IRQ] = 17,
[TIMER1_COMPA_IRQ] = 18,
[TIMER1_COMPB_IRQ] = 19,
[TIMER1_COMPC_IRQ] = 20,
[TIMER1_OVF_IRQ] = 21,
[TIMER0_COMPA_IRQ] = 22,
[TIMER0_COMPB_IRQ] = 23,
[TIMER0_OVF_IRQ] = 24,
[USART0_RXC_IRQ] = 26,
[USART0_DRE_IRQ] = 27,
[USART0_TXC_IRQ] = 28,
[TIMER3_CAPT_IRQ] = 32,
[TIMER3_COMPA_IRQ] = 33,
[TIMER3_COMPB_IRQ] = 34,
[TIMER3_COMPC_IRQ] = 35,
[TIMER3_OVF_IRQ] = 36,
[USART1_RXC_IRQ] = 37,
[USART1_DRE_IRQ] = 38,
[USART1_TXC_IRQ] = 39,
[TIMER4_CAPT_IRQ] = 42,
[TIMER4_COMPA_IRQ] = 43,
[TIMER4_COMPB_IRQ] = 44,
[TIMER4_COMPC_IRQ] = 45,
[TIMER4_OVF_IRQ] = 46,
[TIMER5_CAPT_IRQ] = 47,
[TIMER5_COMPA_IRQ] = 48,
[TIMER5_COMPB_IRQ] = 49,
[TIMER5_COMPC_IRQ] = 50,
[TIMER5_OVF_IRQ] = 51,
[USART2_RXC_IRQ] = 52,
[USART2_DRE_IRQ] = 53,
[USART2_TXC_IRQ] = 54,
[USART3_RXC_IRQ] = 55,
[USART3_DRE_IRQ] = 56,
[USART3_TXC_IRQ] = 57,
};
static void connect_peripheral_irq(const AtmegaMcuClass *k,
SysBusDevice *dev, int dev_irqn,
DeviceState *cpu,
unsigned peripheral_index)
{
int cpu_irq = k->irq[peripheral_index];
if (!cpu_irq) {
return;
}
/* FIXME move that to avr_cpu_set_int() once 'sample' board is removed */
assert(cpu_irq >= 2);
cpu_irq -= 2;
sysbus_connect_irq(dev, dev_irqn, qdev_get_gpio_in(cpu, cpu_irq));
}
static void connect_power_reduction_gpio(AtmegaMcuState *s,
const AtmegaMcuClass *k,
DeviceState *cpu,
unsigned peripheral_index)
{
unsigned power_index = k->dev[peripheral_index].power_index;
assert(k->dev[power_index].addr);
sysbus_connect_irq(SYS_BUS_DEVICE(&s->pwr[power_index - POWER0]),
k->dev[peripheral_index].power_bit,
qdev_get_gpio_in(cpu, 0));
}
static void atmega_realize(DeviceState *dev, Error **errp)
{
AtmegaMcuState *s = ATMEGA_MCU(dev);
const AtmegaMcuClass *mc = ATMEGA_MCU_GET_CLASS(dev);
DeviceState *cpudev;
SysBusDevice *sbd;
char *devname;
size_t i;
assert(mc->io_size <= 0x200);
if (!s->xtal_freq_hz) {
error_setg(errp, "\"xtal-frequency-hz\" property must be provided.");
return;
}
/* CPU */
object_initialize_child(OBJECT(dev), "cpu", &s->cpu, mc->cpu_type);
qdev_realize(DEVICE(&s->cpu), NULL, &error_abort);
cpudev = DEVICE(&s->cpu);
/* SRAM */
memory_region_init_ram(&s->sram, OBJECT(dev), "sram", mc->sram_size,
&error_abort);
memory_region_add_subregion(get_system_memory(),
OFFSET_DATA + mc->io_size, &s->sram);
/* Flash */
memory_region_init_rom(&s->flash, OBJECT(dev),
"flash", mc->flash_size, &error_fatal);
memory_region_add_subregion(get_system_memory(), OFFSET_CODE, &s->flash);
/*
* I/O
*
* 0x00 - 0x1f: Registers
* 0x20 - 0x5f: I/O memory
* 0x60 - 0xff: Extended I/O
*/
s->io = qdev_new(TYPE_UNIMPLEMENTED_DEVICE);
qdev_prop_set_string(s->io, "name", "I/O");
qdev_prop_set_uint64(s->io, "size", mc->io_size);
sysbus_realize_and_unref(SYS_BUS_DEVICE(s->io), &error_fatal);
sysbus_mmio_map_overlap(SYS_BUS_DEVICE(s->io), 0, OFFSET_DATA, -1234);
/* Power Reduction */
for (i = 0; i < POWER_MAX; i++) {
int idx = POWER(i);
if (!mc->dev[idx].addr) {
continue;
}
devname = g_strdup_printf("power%zu", i);
object_initialize_child(OBJECT(dev), devname, &s->pwr[i],
TYPE_AVR_MASK);
sysbus_realize(SYS_BUS_DEVICE(&s->pwr[i]), &error_abort);
sysbus_mmio_map(SYS_BUS_DEVICE(&s->pwr[i]), 0,
OFFSET_DATA + mc->dev[idx].addr);
g_free(devname);
}
/* GPIO */
for (i = 0; i < GPIO_MAX; i++) {
int idx = GPIO(i);
if (!mc->dev[idx].addr) {
continue;
}
devname = g_strdup_printf("atmega-gpio-%c", 'a' + (char)i);
create_unimplemented_device(devname,
OFFSET_DATA + mc->dev[idx].addr, 3);
g_free(devname);
}
/* USART */
for (i = 0; i < USART_MAX; i++) {
int idx = USART(i);
if (!mc->dev[idx].addr) {
continue;
}
devname = g_strdup_printf("usart%zu", i);
object_initialize_child(OBJECT(dev), devname, &s->usart[i],
TYPE_AVR_USART);
qdev_prop_set_chr(DEVICE(&s->usart[i]), "chardev", serial_hd(i));
sbd = SYS_BUS_DEVICE(&s->usart[i]);
sysbus_realize(sbd, &error_abort);
sysbus_mmio_map(sbd, 0, OFFSET_DATA + mc->dev[USART(i)].addr);
connect_peripheral_irq(mc, sbd, 0, cpudev, USART_RXC_IRQ(i));
connect_peripheral_irq(mc, sbd, 1, cpudev, USART_DRE_IRQ(i));
connect_peripheral_irq(mc, sbd, 2, cpudev, USART_TXC_IRQ(i));
connect_power_reduction_gpio(s, mc, DEVICE(&s->usart[i]), idx);
g_free(devname);
}
/* Timer */
for (i = 0; i < TIMER_MAX; i++) {
int idx = TIMER(i);
if (!mc->dev[idx].addr) {
continue;
}
if (!mc->dev[idx].is_timer16) {
create_unimplemented_device("avr-timer8",
OFFSET_DATA + mc->dev[idx].addr, 5);
create_unimplemented_device("avr-timer8-intmask",
OFFSET_DATA
+ mc->dev[idx].intmask_addr, 1);
create_unimplemented_device("avr-timer8-intflag",
OFFSET_DATA
+ mc->dev[idx].intflag_addr, 1);
continue;
}
devname = g_strdup_printf("timer%zu", i);
object_initialize_child(OBJECT(dev), devname, &s->timer[i],
TYPE_AVR_TIMER16);
object_property_set_uint(OBJECT(&s->timer[i]), "cpu-frequency-hz",
s->xtal_freq_hz, &error_abort);
sbd = SYS_BUS_DEVICE(&s->timer[i]);
sysbus_realize(sbd, &error_abort);
sysbus_mmio_map(sbd, 0, OFFSET_DATA + mc->dev[idx].addr);
sysbus_mmio_map(sbd, 1, OFFSET_DATA + mc->dev[idx].intmask_addr);
sysbus_mmio_map(sbd, 2, OFFSET_DATA + mc->dev[idx].intflag_addr);
connect_peripheral_irq(mc, sbd, 0, cpudev, TIMER_CAPT_IRQ(i));
connect_peripheral_irq(mc, sbd, 1, cpudev, TIMER_COMPA_IRQ(i));
connect_peripheral_irq(mc, sbd, 2, cpudev, TIMER_COMPB_IRQ(i));
connect_peripheral_irq(mc, sbd, 3, cpudev, TIMER_COMPC_IRQ(i));
connect_peripheral_irq(mc, sbd, 4, cpudev, TIMER_OVF_IRQ(i));
connect_power_reduction_gpio(s, mc, DEVICE(&s->timer[i]), idx);
g_free(devname);
}
create_unimplemented_device("avr-twi", OFFSET_DATA + 0x0b8, 6);
create_unimplemented_device("avr-adc", OFFSET_DATA + 0x078, 8);
create_unimplemented_device("avr-ext-mem-ctrl", OFFSET_DATA + 0x074, 2);
create_unimplemented_device("avr-watchdog", OFFSET_DATA + 0x060, 1);
create_unimplemented_device("avr-spi", OFFSET_DATA + 0x04c, 3);
create_unimplemented_device("avr-eeprom", OFFSET_DATA + 0x03f, 3);
}
static Property atmega_props[] = {
DEFINE_PROP_UINT64("xtal-frequency-hz", AtmegaMcuState,
xtal_freq_hz, 0),
DEFINE_PROP_END_OF_LIST()
};
static void atmega_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
dc->realize = atmega_realize;
device_class_set_props(dc, atmega_props);
/* Reason: Mapped at fixed location on the system bus */
dc->user_creatable = false;
}
static void atmega168_class_init(ObjectClass *oc, void *data)
{
AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
amc->cpu_type = AVR_CPU_TYPE_NAME("avr5");
amc->flash_size = 16 * KiB;
amc->eeprom_size = 512;
amc->sram_size = 1 * KiB;
amc->io_size = 256;
amc->gpio_count = 23;
amc->adc_count = 6;
amc->irq = irq168_328;
amc->dev = dev168_328;
};
static void atmega328_class_init(ObjectClass *oc, void *data)
{
AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
amc->cpu_type = AVR_CPU_TYPE_NAME("avr5");
amc->flash_size = 32 * KiB;
amc->eeprom_size = 1 * KiB;
amc->sram_size = 2 * KiB;
amc->io_size = 256;
amc->gpio_count = 23;
amc->adc_count = 6;
amc->irq = irq168_328;
amc->dev = dev168_328;
};
static void atmega1280_class_init(ObjectClass *oc, void *data)
{
AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
amc->cpu_type = AVR_CPU_TYPE_NAME("avr51");
amc->flash_size = 128 * KiB;
amc->eeprom_size = 4 * KiB;
amc->sram_size = 8 * KiB;
amc->io_size = 512;
amc->gpio_count = 86;
amc->adc_count = 16;
amc->irq = irq1280_2560;
amc->dev = dev1280_2560;
};
static void atmega2560_class_init(ObjectClass *oc, void *data)
{
AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
amc->cpu_type = AVR_CPU_TYPE_NAME("avr6");
amc->flash_size = 256 * KiB;
amc->eeprom_size = 4 * KiB;
amc->sram_size = 8 * KiB;
amc->io_size = 512;
amc->gpio_count = 54;
amc->adc_count = 16;
amc->irq = irq1280_2560;
amc->dev = dev1280_2560;
};
static const TypeInfo atmega_mcu_types[] = {
{
.name = TYPE_ATMEGA168_MCU,
.parent = TYPE_ATMEGA_MCU,
.class_init = atmega168_class_init,
}, {
.name = TYPE_ATMEGA328_MCU,
.parent = TYPE_ATMEGA_MCU,
.class_init = atmega328_class_init,
}, {
.name = TYPE_ATMEGA1280_MCU,
.parent = TYPE_ATMEGA_MCU,
.class_init = atmega1280_class_init,
}, {
.name = TYPE_ATMEGA2560_MCU,
.parent = TYPE_ATMEGA_MCU,
.class_init = atmega2560_class_init,
}, {
.name = TYPE_ATMEGA_MCU,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(AtmegaMcuState),
.class_size = sizeof(AtmegaMcuClass),
.class_init = atmega_class_init,
.abstract = true,
}
};
DEFINE_TYPES(atmega_mcu_types)
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