+++ /dev/null
-/*
- * Maxim MAX1110/1111 ADC chip emulation.
- *
- * Copyright (c) 2006 Openedhand Ltd.
- * Written by Andrzej Zaborowski <balrog@zabor.org>
- *
- * This code is licensed under the GNU GPLv2.
- *
- * Contributions after 2012-01-13 are licensed under the terms of the
- * GNU GPL, version 2 or (at your option) any later version.
- */
-
-#include "qemu/osdep.h"
-#include "hw/adc/max111x.h"
-#include "hw/irq.h"
-#include "migration/vmstate.h"
-#include "qemu/module.h"
-#include "hw/qdev-properties.h"
-
-/* Control-byte bitfields */
-#define CB_PD0 (1 << 0)
-#define CB_PD1 (1 << 1)
-#define CB_SGL (1 << 2)
-#define CB_UNI (1 << 3)
-#define CB_SEL0 (1 << 4)
-#define CB_SEL1 (1 << 5)
-#define CB_SEL2 (1 << 6)
-#define CB_START (1 << 7)
-
-#define CHANNEL_NUM(v, b0, b1, b2) \
- ((((v) >> (2 + (b0))) & 4) | \
- (((v) >> (3 + (b1))) & 2) | \
- (((v) >> (4 + (b2))) & 1))
-
-static uint32_t max111x_read(MAX111xState *s)
-{
- if (!s->tb1)
- return 0;
-
- switch (s->cycle ++) {
- case 1:
- return s->rb2;
- case 2:
- return s->rb3;
- }
-
- return 0;
-}
-
-/* Interpret a control-byte */
-static void max111x_write(MAX111xState *s, uint32_t value)
-{
- int measure, chan;
-
- /* Ignore the value if START bit is zero */
- if (!(value & CB_START))
- return;
-
- s->cycle = 0;
-
- if (!(value & CB_PD1)) {
- s->tb1 = 0;
- return;
- }
-
- s->tb1 = value;
-
- if (s->inputs == 8)
- chan = CHANNEL_NUM(value, 1, 0, 2);
- else
- chan = CHANNEL_NUM(value & ~CB_SEL0, 0, 1, 2);
-
- if (value & CB_SGL)
- measure = s->input[chan] - s->com;
- else
- measure = s->input[chan] - s->input[chan ^ 1];
-
- if (!(value & CB_UNI))
- measure ^= 0x80;
-
- s->rb2 = (measure >> 2) & 0x3f;
- s->rb3 = (measure << 6) & 0xc0;
-
- /* FIXME: When should the IRQ be lowered? */
- qemu_irq_raise(s->interrupt);
-}
-
-static uint32_t max111x_transfer(SSIPeripheral *dev, uint32_t value)
-{
- MAX111xState *s = MAX_111X(dev);
- max111x_write(s, value);
- return max111x_read(s);
-}
-
-static const VMStateDescription vmstate_max111x = {
- .name = "max111x",
- .version_id = 1,
- .minimum_version_id = 1,
- .fields = (const VMStateField[]) {
- VMSTATE_SSI_PERIPHERAL(parent_obj, MAX111xState),
- VMSTATE_UINT8(tb1, MAX111xState),
- VMSTATE_UINT8(rb2, MAX111xState),
- VMSTATE_UINT8(rb3, MAX111xState),
- VMSTATE_INT32_EQUAL(inputs, MAX111xState, NULL),
- VMSTATE_INT32(com, MAX111xState),
- VMSTATE_ARRAY_INT32_UNSAFE(input, MAX111xState, inputs,
- vmstate_info_uint8, uint8_t),
- VMSTATE_END_OF_LIST()
- }
-};
-
-static void max111x_input_set(void *opaque, int line, int value)
-{
- MAX111xState *s = MAX_111X(opaque);
-
- assert(line >= 0 && line < s->inputs);
- s->input[line] = value;
-}
-
-static int max111x_init(SSIPeripheral *d, int inputs)
-{
- DeviceState *dev = DEVICE(d);
- MAX111xState *s = MAX_111X(dev);
-
- qdev_init_gpio_out(dev, &s->interrupt, 1);
- qdev_init_gpio_in(dev, max111x_input_set, inputs);
-
- s->inputs = inputs;
-
- return 0;
-}
-
-static void max1110_realize(SSIPeripheral *dev, Error **errp)
-{
- max111x_init(dev, 8);
-}
-
-static void max1111_realize(SSIPeripheral *dev, Error **errp)
-{
- max111x_init(dev, 4);
-}
-
-static void max111x_reset(DeviceState *dev)
-{
- MAX111xState *s = MAX_111X(dev);
- int i;
-
- for (i = 0; i < s->inputs; i++) {
- s->input[i] = s->reset_input[i];
- }
- s->com = 0;
- s->tb1 = 0;
- s->rb2 = 0;
- s->rb3 = 0;
- s->cycle = 0;
-}
-
-static Property max1110_properties[] = {
- /* Reset values for ADC inputs */
- DEFINE_PROP_UINT8("input0", MAX111xState, reset_input[0], 0xf0),
- DEFINE_PROP_UINT8("input1", MAX111xState, reset_input[1], 0xe0),
- DEFINE_PROP_UINT8("input2", MAX111xState, reset_input[2], 0xd0),
- DEFINE_PROP_UINT8("input3", MAX111xState, reset_input[3], 0xc0),
- DEFINE_PROP_END_OF_LIST(),
-};
-
-static Property max1111_properties[] = {
- /* Reset values for ADC inputs */
- DEFINE_PROP_UINT8("input0", MAX111xState, reset_input[0], 0xf0),
- DEFINE_PROP_UINT8("input1", MAX111xState, reset_input[1], 0xe0),
- DEFINE_PROP_UINT8("input2", MAX111xState, reset_input[2], 0xd0),
- DEFINE_PROP_UINT8("input3", MAX111xState, reset_input[3], 0xc0),
- DEFINE_PROP_UINT8("input4", MAX111xState, reset_input[4], 0xb0),
- DEFINE_PROP_UINT8("input5", MAX111xState, reset_input[5], 0xa0),
- DEFINE_PROP_UINT8("input6", MAX111xState, reset_input[6], 0x90),
- DEFINE_PROP_UINT8("input7", MAX111xState, reset_input[7], 0x80),
- DEFINE_PROP_END_OF_LIST(),
-};
-
-static void max111x_class_init(ObjectClass *klass, void *data)
-{
- SSIPeripheralClass *k = SSI_PERIPHERAL_CLASS(klass);
- DeviceClass *dc = DEVICE_CLASS(klass);
-
- k->transfer = max111x_transfer;
- device_class_set_legacy_reset(dc, max111x_reset);
- dc->vmsd = &vmstate_max111x;
- set_bit(DEVICE_CATEGORY_MISC, dc->categories);
-}
-
-static const TypeInfo max111x_info = {
- .name = TYPE_MAX_111X,
- .parent = TYPE_SSI_PERIPHERAL,
- .instance_size = sizeof(MAX111xState),
- .class_init = max111x_class_init,
- .abstract = true,
-};
-
-static void max1110_class_init(ObjectClass *klass, void *data)
-{
- SSIPeripheralClass *k = SSI_PERIPHERAL_CLASS(klass);
- DeviceClass *dc = DEVICE_CLASS(klass);
-
- k->realize = max1110_realize;
- device_class_set_props(dc, max1110_properties);
-}
-
-static const TypeInfo max1110_info = {
- .name = TYPE_MAX_1110,
- .parent = TYPE_MAX_111X,
- .class_init = max1110_class_init,
-};
-
-static void max1111_class_init(ObjectClass *klass, void *data)
-{
- SSIPeripheralClass *k = SSI_PERIPHERAL_CLASS(klass);
- DeviceClass *dc = DEVICE_CLASS(klass);
-
- k->realize = max1111_realize;
- device_class_set_props(dc, max1111_properties);
-}
-
-static const TypeInfo max1111_info = {
- .name = TYPE_MAX_1111,
- .parent = TYPE_MAX_111X,
- .class_init = max1111_class_init,
-};
-
-static void max111x_register_types(void)
-{
- type_register_static(&max111x_info);
- type_register_static(&max1110_info);
- type_register_static(&max1111_info);
-}
-
-type_init(max111x_register_types)
projects / thirdparty / qemu.git / commitdiff
