---
hw/adc/aspeed_adc.c | 417 ++++++++++++++++++++++++++++++++++++
hw/adc/meson.build | 1 +
hw/adc/trace-events | 3 +
include/hw/adc/aspeed_adc.h | 55 +++++
4 files changed, 476 insertions(+)
create mode 100644 hw/adc/aspeed_adc.c
create mode 100644 include/hw/adc/aspeed_adc.h
diff --git a/hw/adc/aspeed_adc.c b/hw/adc/aspeed_adc.c
new file mode 100644
index 0000000000..8a132ef375
--- /dev/null
+++ b/hw/adc/aspeed_adc.c
@@ -0,0 +1,417 @@
+/*
+ * Aspeed ADC
+ *
+ * Copyright 2017-2021 IBM Corp.
+ *
+ * Andrew Jeffery <andrew@aj.id.au>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qemu/log.h"
+#include "hw/irq.h"
+#include "hw/qdev-properties.h"
+#include "migration/vmstate.h"
+#include "hw/adc/aspeed_adc.h"
+#include "trace.h"
+
+#define ASPEED_ADC_ENGINE_CH_EN_MASK 0xffff0000
+#define ASPEED_ADC_ENGINE_CH_EN(x) ((BIT(x)) << 16)
+#define ASPEED_ADC_ENGINE_INIT BIT(8)
+#define ASPEED_ADC_ENGINE_AUTO_COMP BIT(5)
+#define ASPEED_ADC_ENGINE_COMP BIT(4)
+#define ASPEED_ADC_ENGINE_MODE_MASK 0x0000000e
+#define ASPEED_ADC_ENGINE_MODE_OFF (0b000 << 1)
+#define ASPEED_ADC_ENGINE_MODE_STANDBY (0b001 << 1)
+#define ASPEED_ADC_ENGINE_MODE_NORMAL (0b111 << 1)
+#define ASPEED_ADC_ENGINE_EN BIT(0)
+#define ASPEED_ADC_HYST_EN BIT(31)
+
+#define ASPEED_ADC_L_MASK ((1 << 10) - 1)
+#define ASPEED_ADC_L(x) ((x) & ASPEED_ADC_L_MASK)
+#define ASPEED_ADC_H(x) (((x) >> 16) & ASPEED_ADC_L_MASK)
+#define ASPEED_ADC_LH_MASK (ASPEED_ADC_L_MASK << 16 | ASPEED_ADC_L_MASK)
+#define LOWER_CHANNEL_MASK ((1 << 10) - 1)
+#define LOWER_CHANNEL_DATA(x) ((x) & LOWER_CHANNEL_MASK)
+#define UPPER_CHANNEL_DATA(x) (((x) >> 16) & LOWER_CHANNEL_MASK)
+
+#define TO_REG(addr) (addr >> 2)
+
+#define ENGINE_CONTROL TO_REG(0x00)
+#define INTERRUPT_CONTROL TO_REG(0x04)
+#define VGA_DETECT_CONTROL TO_REG(0x08)
+#define CLOCK_CONTROL TO_REG(0x0C)
+#define DATA_CHANNEL_1_AND_0 TO_REG(0x10)
+#define DATA_CHANNEL_7_AND_6 TO_REG(0x1C)
+#define DATA_CHANNEL_9_AND_8 TO_REG(0x20)
+#define DATA_CHANNEL_15_AND_14 TO_REG(0x2C)
+#define BOUNDS_CHANNEL_0 TO_REG(0x30)
+#define BOUNDS_CHANNEL_7 TO_REG(0x4C)
+#define BOUNDS_CHANNEL_8 TO_REG(0x50)
+#define BOUNDS_CHANNEL_15 TO_REG(0x6C)
+#define HYSTERESIS_CHANNEL_0 TO_REG(0x70)
+#define HYSTERESIS_CHANNEL_7 TO_REG(0x8C)
+#define HYSTERESIS_CHANNEL_8 TO_REG(0x90)
+#define HYSTERESIS_CHANNEL_15 TO_REG(0xAC)
+#define INTERRUPT_SOURCE TO_REG(0xC0)
+#define COMPENSATING_AND_TRIMMING TO_REG(0xC4)
+
+static inline uint32_t update_channels(uint32_t current)
+{
+ return ((((current >> 16) & ASPEED_ADC_L_MASK) + 7) << 16) |
+ ((current + 5) & ASPEED_ADC_L_MASK);
+}
+
+static bool breaks_threshold(AspeedADCEngineState *s, int reg)
+{
+ assert(reg >= DATA_CHANNEL_1_AND_0 &&
+ reg < DATA_CHANNEL_1_AND_0 + s->nr_channels / 2);
+
+ int a_bounds_reg = BOUNDS_CHANNEL_0 + (reg - DATA_CHANNEL_1_AND_0) * 2;
+ int b_bounds_reg = a_bounds_reg + 1;
+ uint32_t a_and_b = s->regs[reg];
+ uint32_t a_bounds = s->regs[a_bounds_reg];
+ uint32_t b_bounds = s->regs[b_bounds_reg];
+ uint32_t a = ASPEED_ADC_L(a_and_b);
+ uint32_t b = ASPEED_ADC_H(a_and_b);
+ uint32_t a_lower = ASPEED_ADC_L(a_bounds);
+ uint32_t a_upper = ASPEED_ADC_H(a_bounds);
+ uint32_t b_lower = ASPEED_ADC_L(b_bounds);
+ uint32_t b_upper = ASPEED_ADC_H(b_bounds);
+
+ return (a < a_lower || a > a_upper) ||
+ (b < b_lower || b > b_upper);
+}
+
+static uint32_t read_channel_sample(AspeedADCEngineState *s, int reg)
+{
+ assert(reg >= DATA_CHANNEL_1_AND_0 &&
+ reg < DATA_CHANNEL_1_AND_0 + s->nr_channels / 2);
+
+ /* Poor man's sampling */
+ uint32_t value = s->regs[reg];
+ s->regs[reg] = update_channels(s->regs[reg]);
+
+ if (breaks_threshold(s, reg)) {
+ s->regs[INTERRUPT_CONTROL] |= BIT(reg - DATA_CHANNEL_1_AND_0);
+ qemu_irq_raise(s->irq);
+ }
+
+ return value;
+}
+
+static uint64_t aspeed_adc_engine_read(void *opaque, hwaddr addr,
+ unsigned int size)
+{
+ AspeedADCEngineState *s = ASPEED_ADC_ENGINE(opaque);
+ int reg = TO_REG(addr);
+ uint32_t value = 0;
+
+ switch (reg) {
+ case BOUNDS_CHANNEL_8 ... BOUNDS_CHANNEL_15:
+ if (s->nr_channels <= 8) {
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: engine[%u]: "
+ "bounds register %u invalid, only 0...7 valid\n",
+ __func__, s->engine_id, reg - BOUNDS_CHANNEL_0);
+ break;
+ }
+ /* fallthrough */
+ case HYSTERESIS_CHANNEL_8 ... HYSTERESIS_CHANNEL_15:
+ if (s->nr_channels <= 8) {
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: engine[%u]: "
+ "hysteresis register %u invalid, only 0...7 valid\n",
+ __func__, s->engine_id, reg - HYSTERESIS_CHANNEL_0);
+ break;
+ }
+ /* fallthrough */
+ case BOUNDS_CHANNEL_0 ... BOUNDS_CHANNEL_7:
+ case HYSTERESIS_CHANNEL_0 ... HYSTERESIS_CHANNEL_7:
+ case ENGINE_CONTROL:
+ case INTERRUPT_CONTROL:
+ case VGA_DETECT_CONTROL:
+ case CLOCK_CONTROL:
+ case INTERRUPT_SOURCE:
+ case COMPENSATING_AND_TRIMMING:
+ value = s->regs[reg];
+ break;
+ case DATA_CHANNEL_9_AND_8 ... DATA_CHANNEL_15_AND_14:
+ if (s->nr_channels <= 8) {
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: engine[%u]: "
+ "data register %u invalid, only 0...3 valid\n",
+ __func__, s->engine_id, reg - DATA_CHANNEL_1_AND_0);
+ break;
+ }
+ /* fallthrough */
+ case DATA_CHANNEL_1_AND_0 ... DATA_CHANNEL_7_AND_6:
+ value = read_channel_sample(s, reg);
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: engine[%u]: 0x%" HWADDR_PRIx "\n",
+ __func__, s->engine_id, addr);
+ break;
+ }
+
+ trace_aspeed_adc_engine_read(s->engine_id, addr, value);
+ return value;
+}
+
+static void aspeed_adc_engine_write(void *opaque, hwaddr addr, uint64_t value,
+ unsigned int size)
+{
+ AspeedADCEngineState *s = ASPEED_ADC_ENGINE(opaque);
+ int reg = TO_REG(addr);
+ uint32_t init = 0;
+
+ trace_aspeed_adc_engine_write(s->engine_id, addr, value);
+
+ switch (reg) {
+ case ENGINE_CONTROL:
+ init = !!(value & ASPEED_ADC_ENGINE_EN);
+ init *= ASPEED_ADC_ENGINE_INIT;
+
+ value &= ~ASPEED_ADC_ENGINE_INIT;
+ value |= init;
+
+ value &= ~ASPEED_ADC_ENGINE_AUTO_COMP;
+ break;
+ case INTERRUPT_CONTROL:
+ case VGA_DETECT_CONTROL:
+ case CLOCK_CONTROL:
+ break;
+ case DATA_CHANNEL_9_AND_8 ... DATA_CHANNEL_15_AND_14:
+ if (s->nr_channels <= 8) {
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: engine[%u]: "
+ "data register %u invalid, only 0...3 valid\n",
+ __func__, s->engine_id, reg - DATA_CHANNEL_1_AND_0);
+ return;
+ }
+ /* fallthrough */
+ case BOUNDS_CHANNEL_8 ... BOUNDS_CHANNEL_15:
+ if (s->nr_channels <= 8) {
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: engine[%u]: "
+ "bounds register %u invalid, only 0...7 valid\n",
+ __func__, s->engine_id, reg - BOUNDS_CHANNEL_0);
+ return;
+ }
+ /* fallthrough */
+ case DATA_CHANNEL_1_AND_0 ... DATA_CHANNEL_7_AND_6:
+ case BOUNDS_CHANNEL_0 ... BOUNDS_CHANNEL_7:
+ value &= ASPEED_ADC_LH_MASK;
+ break;
+ case HYSTERESIS_CHANNEL_8 ... HYSTERESIS_CHANNEL_15:
+ if (s->nr_channels <= 8) {
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: engine[%u]: "
+ "hysteresis register %u invalid, only 0...7 valid\n",
+ __func__, s->engine_id, reg - HYSTERESIS_CHANNEL_0);
+ return;
+ }
+ /* fallthrough */
+ case HYSTERESIS_CHANNEL_0 ... HYSTERESIS_CHANNEL_7:
+ value &= (ASPEED_ADC_HYST_EN | ASPEED_ADC_LH_MASK);
+ break;
+ case INTERRUPT_SOURCE:
+ value &= 0xffff;
+ break;
+ case COMPENSATING_AND_TRIMMING:
+ value &= 0xf;
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: engine[%u]: "
+ "0x%" HWADDR_PRIx " 0x%" PRIx64 "\n",
+ __func__, s->engine_id, addr, value);
+ break;
+ }
+
+ s->regs[reg] = value;
+}
+
+static const MemoryRegionOps aspeed_adc_engine_ops = {
+ .read = aspeed_adc_engine_read,
+ .write = aspeed_adc_engine_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ .unaligned = false,
+ },
+};
+
+static const uint32_t aspeed_adc_resets[ASPEED_ADC_NR_REGS] = {
+ [ENGINE_CONTROL] = 0x00000000,
+ [INTERRUPT_CONTROL] = 0x00000000,
+ [VGA_DETECT_CONTROL] = 0x0000000f,
+ [CLOCK_CONTROL] = 0x0000000f,
+};
+
+static void aspeed_adc_engine_reset(DeviceState *dev)
+{
+ AspeedADCEngineState *s = ASPEED_ADC_ENGINE(dev);
+
+ memcpy(s->regs, aspeed_adc_resets, sizeof(aspeed_adc_resets));
+}
+
+static void aspeed_adc_engine_realize(DeviceState *dev, Error **errp)
+{
+ AspeedADCEngineState *s = ASPEED_ADC_ENGINE(dev);
+ SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
+ g_autofree char *name = g_strdup_printf(TYPE_ASPEED_ADC_ENGINE ".%d",
+ s->engine_id);
+
+ assert(s->engine_id < 2);
+
+ sysbus_init_irq(sbd, &s->irq);
+
+ memory_region_init_io(&s->mmio, OBJECT(s), &aspeed_adc_engine_ops, s, name,
+ 0x100);
+
+ sysbus_init_mmio(sbd, &s->mmio);
+}
+
+static const VMStateDescription vmstate_aspeed_adc_engine = {
+ .name = TYPE_ASPEED_ADC,
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32_ARRAY(regs, AspeedADCEngineState, ASPEED_ADC_NR_REGS),
+ VMSTATE_END_OF_LIST(),
+ }
+};
+
+static Property aspeed_adc_engine_properties[] = {
+ DEFINE_PROP_UINT32("engine-id", AspeedADCEngineState, engine_id, 0),
+ DEFINE_PROP_UINT32("nr-channels", AspeedADCEngineState, nr_channels, 0),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void aspeed_adc_engine_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->realize = aspeed_adc_engine_realize;
+ dc->reset = aspeed_adc_engine_reset;
+ device_class_set_props(dc, aspeed_adc_engine_properties);
+ dc->desc = "Aspeed Analog-to-Digital Engine";
+ dc->vmsd = &vmstate_aspeed_adc_engine;
+}
+
+static const TypeInfo aspeed_adc_engine_info = {
+ .name = TYPE_ASPEED_ADC_ENGINE,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(AspeedADCEngineState),
+ .class_init = aspeed_adc_engine_class_init,
+};
+
+static void aspeed_adc_instance_init(Object *obj)
+{
+ AspeedADCState *s = ASPEED_ADC(obj);
+ AspeedADCClass *aac = ASPEED_ADC_GET_CLASS(obj);
+ uint32_t nr_channels = ASPEED_ADC_NR_CHANNELS / aac->nr_engines;
+
+ for (int i = 0; i < aac->nr_engines; i++) {
+ AspeedADCEngineState *engine = &s->engines[i];
+ object_initialize_child(obj, "engine[*]", engine,
+ TYPE_ASPEED_ADC_ENGINE);
+ qdev_prop_set_uint32(DEVICE(engine), "engine-id", i);
+ qdev_prop_set_uint32(DEVICE(engine), "nr-channels", nr_channels);
+ }
+}
+
+static void aspeed_adc_set_irq(void *opaque, int n, int level)
+{
+ AspeedADCState *s = opaque;
+ AspeedADCClass *aac = ASPEED_ADC_GET_CLASS(s);
+ uint32_t pending = 0;
+
+ /* TODO: update Global IRQ status register on AST2600 (Need specs) */
+ for (int i = 0; i < aac->nr_engines; i++) {
+ uint32_t irq_status = s->engines[i].regs[INTERRUPT_CONTROL] & 0xFF;
+ pending |= irq_status << (i * 8);
+ }
+
+ qemu_set_irq(s->irq, !!pending);
+}
+
+static void aspeed_adc_realize(DeviceState *dev, Error **errp)
+{
+ AspeedADCState *s = ASPEED_ADC(dev);
+ SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
+ AspeedADCClass *aac = ASPEED_ADC_GET_CLASS(dev);
+
+ qdev_init_gpio_in_named_with_opaque(DEVICE(sbd), aspeed_adc_set_irq,
+ s, NULL, aac->nr_engines);
+
+ sysbus_init_irq(sbd, &s->irq);
+
+ memory_region_init(&s->mmio, OBJECT(s), TYPE_ASPEED_ADC, 0x1000);
+
+ sysbus_init_mmio(sbd, &s->mmio);
+
+ for (int i = 0; i < aac->nr_engines; i++) {
+ Object *eng = OBJECT(&s->engines[i]);
+
+ if (!sysbus_realize(SYS_BUS_DEVICE(eng), errp)) {
+ return;
+ }
+ sysbus_connect_irq(SYS_BUS_DEVICE(eng), 0,
+ qdev_get_gpio_in(DEVICE(sbd), i));
+ memory_region_add_subregion(&s->mmio, i * 0x100, &s->engines[i].mmio);
+ }
+}
+
+static void aspeed_adc_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ AspeedADCClass *aac = ASPEED_ADC_CLASS(klass);
+
+ dc->realize = aspeed_adc_realize;
+ dc->desc = "Aspeed Analog-to-Digital Converter";
+ aac->nr_engines = 1;
+}
+
+static void aspeed_2600_adc_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ AspeedADCClass *aac = ASPEED_ADC_CLASS(klass);
+
+ dc->desc = "ASPEED 2600 ADC Controller";
+ aac->nr_engines = 2;
+}
+
+static const TypeInfo aspeed_adc_info = {
+ .name = TYPE_ASPEED_ADC,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_init = aspeed_adc_instance_init,
+ .instance_size = sizeof(AspeedADCState),
+ .class_init = aspeed_adc_class_init,
+ .class_size = sizeof(AspeedADCClass),
+ .abstract = true,
+};
+
+static const TypeInfo aspeed_2400_adc_info = {
+ .name = TYPE_ASPEED_2400_ADC,
+ .parent = TYPE_ASPEED_ADC,
+};
+
+static const TypeInfo aspeed_2500_adc_info = {
+ .name = TYPE_ASPEED_2500_ADC,
+ .parent = TYPE_ASPEED_ADC,
+};
+
+static const TypeInfo aspeed_2600_adc_info = {
+ .name = TYPE_ASPEED_2600_ADC,
+ .parent = TYPE_ASPEED_ADC,
+ .class_init = aspeed_2600_adc_class_init,
+};
+
+static void aspeed_adc_register_types(void)
+{
+ type_register_static(&aspeed_adc_engine_info);
+ type_register_static(&aspeed_adc_info);
+ type_register_static(&aspeed_2400_adc_info);
+ type_register_static(&aspeed_2500_adc_info);
+ type_register_static(&aspeed_2600_adc_info);
+}
+
+type_init(aspeed_adc_register_types);
diff --git a/hw/adc/meson.build b/hw/adc/meson.build
index ac4f093fea..b29ac7ccdf 100644
--- a/hw/adc/meson.build
+++ b/hw/adc/meson.build
@@ -1,4 +1,5 @@
softmmu_ss.add(when: 'CONFIG_STM32F2XX_ADC', if_true:
files('stm32f2xx_adc.c'))
+softmmu_ss.add(when: 'CONFIG_ASPEED_SOC', if_true: files('aspeed_adc.c'))
softmmu_ss.add(when: 'CONFIG_NPCM7XX', if_true: files('npcm7xx_adc.c'))
softmmu_ss.add(when: 'CONFIG_ZYNQ', if_true: files('zynq-xadc.c'))
softmmu_ss.add(when: 'CONFIG_MAX111X', if_true: files('max111x.c'))
diff --git a/hw/adc/trace-events b/hw/adc/trace-events
index 456f21c8f4..5a4c444d77 100644
--- a/hw/adc/trace-events
+++ b/hw/adc/trace-events
@@ -3,3 +3,6 @@
# npcm7xx_adc.c
npcm7xx_adc_read(const char *id, uint64_t offset, uint32_t value) " %s offset: 0x%04"
PRIx64 " value 0x%04" PRIx32
npcm7xx_adc_write(const char *id, uint64_t offset, uint32_t value) "%s offset: 0x%04"
PRIx64 " value 0x%04" PRIx32
+
+aspeed_adc_engine_read(uint32_t engine_id, uint64_t addr, uint64_t value) "engine[%u]
0x%" PRIx64 " 0x%" PRIx64
+aspeed_adc_engine_write(uint32_t engine_id, uint64_t addr, uint64_t value) "engine[%u]
0x%" PRIx64 " 0x%" PRIx64
diff --git a/include/hw/adc/aspeed_adc.h b/include/hw/adc/aspeed_adc.h
new file mode 100644
index 0000000000..2f166e8be1
--- /dev/null
+++ b/include/hw/adc/aspeed_adc.h
@@ -0,0 +1,55 @@
+/*
+ * Aspeed ADC
+ *
+ * Copyright 2017-2021 IBM Corp.
+ *
+ * Andrew Jeffery <andrew@aj.id.au>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef HW_ADC_ASPEED_ADC_H
+#define HW_ADC_ASPEED_ADC_H
+
+#include "hw/sysbus.h"
+
+#define TYPE_ASPEED_ADC "aspeed.adc"
+#define TYPE_ASPEED_2400_ADC TYPE_ASPEED_ADC "-ast2400"
+#define TYPE_ASPEED_2500_ADC TYPE_ASPEED_ADC "-ast2500"
+#define TYPE_ASPEED_2600_ADC TYPE_ASPEED_ADC "-ast2600"
+OBJECT_DECLARE_TYPE(AspeedADCState, AspeedADCClass, ASPEED_ADC)
+
+#define TYPE_ASPEED_ADC_ENGINE "aspeed.adc.engine"
+OBJECT_DECLARE_SIMPLE_TYPE(AspeedADCEngineState, ASPEED_ADC_ENGINE)
+
+#define ASPEED_ADC_NR_CHANNELS 16
+#define ASPEED_ADC_NR_REGS (0xD0 >> 2)
+
+struct AspeedADCEngineState {
+ /* <private> */
+ SysBusDevice parent;
+
+ MemoryRegion mmio;
+ qemu_irq irq;
+ uint32_t engine_id;
+ uint32_t nr_channels;
+ uint32_t regs[ASPEED_ADC_NR_REGS];
+};
+
+struct AspeedADCState {
+ /* <private> */
+ SysBusDevice parent;
+
+ MemoryRegion mmio;
+ qemu_irq irq;
+
+ AspeedADCEngineState engines[2];
+};
+
+struct AspeedADCClass {
+ SysBusDeviceClass parent_class;
+
+ uint32_t nr_engines;
+};
+
+#endif /* HW_ADC_ASPEED_ADC_H */