158f3e3feSCorey Minyard /*
258f3e3feSCorey Minyard * Maxim MAX1110/1111 ADC chip emulation.
358f3e3feSCorey Minyard *
458f3e3feSCorey Minyard * Copyright (c) 2006 Openedhand Ltd.
558f3e3feSCorey Minyard * Written by Andrzej Zaborowski <balrog@zabor.org>
658f3e3feSCorey Minyard *
758f3e3feSCorey Minyard * This code is licensed under the GNU GPLv2.
858f3e3feSCorey Minyard *
958f3e3feSCorey Minyard * Contributions after 2012-01-13 are licensed under the terms of the
1058f3e3feSCorey Minyard * GNU GPL, version 2 or (at your option) any later version.
1158f3e3feSCorey Minyard */
1258f3e3feSCorey Minyard
1358f3e3feSCorey Minyard #include "qemu/osdep.h"
1458f3e3feSCorey Minyard #include "hw/adc/max111x.h"
1558f3e3feSCorey Minyard #include "hw/irq.h"
1658f3e3feSCorey Minyard #include "migration/vmstate.h"
1758f3e3feSCorey Minyard #include "qemu/module.h"
1858f3e3feSCorey Minyard #include "hw/qdev-properties.h"
1958f3e3feSCorey Minyard
2058f3e3feSCorey Minyard /* Control-byte bitfields */
2158f3e3feSCorey Minyard #define CB_PD0 (1 << 0)
2258f3e3feSCorey Minyard #define CB_PD1 (1 << 1)
2358f3e3feSCorey Minyard #define CB_SGL (1 << 2)
2458f3e3feSCorey Minyard #define CB_UNI (1 << 3)
2558f3e3feSCorey Minyard #define CB_SEL0 (1 << 4)
2658f3e3feSCorey Minyard #define CB_SEL1 (1 << 5)
2758f3e3feSCorey Minyard #define CB_SEL2 (1 << 6)
2858f3e3feSCorey Minyard #define CB_START (1 << 7)
2958f3e3feSCorey Minyard
3058f3e3feSCorey Minyard #define CHANNEL_NUM(v, b0, b1, b2) \
3158f3e3feSCorey Minyard ((((v) >> (2 + (b0))) & 4) | \
3258f3e3feSCorey Minyard (((v) >> (3 + (b1))) & 2) | \
3358f3e3feSCorey Minyard (((v) >> (4 + (b2))) & 1))
3458f3e3feSCorey Minyard
max111x_read(MAX111xState * s)3558f3e3feSCorey Minyard static uint32_t max111x_read(MAX111xState *s)
3658f3e3feSCorey Minyard {
3758f3e3feSCorey Minyard if (!s->tb1)
3858f3e3feSCorey Minyard return 0;
3958f3e3feSCorey Minyard
4058f3e3feSCorey Minyard switch (s->cycle ++) {
4158f3e3feSCorey Minyard case 1:
4258f3e3feSCorey Minyard return s->rb2;
4358f3e3feSCorey Minyard case 2:
4458f3e3feSCorey Minyard return s->rb3;
4558f3e3feSCorey Minyard }
4658f3e3feSCorey Minyard
4758f3e3feSCorey Minyard return 0;
4858f3e3feSCorey Minyard }
4958f3e3feSCorey Minyard
5058f3e3feSCorey Minyard /* Interpret a control-byte */
max111x_write(MAX111xState * s,uint32_t value)5158f3e3feSCorey Minyard static void max111x_write(MAX111xState *s, uint32_t value)
5258f3e3feSCorey Minyard {
5358f3e3feSCorey Minyard int measure, chan;
5458f3e3feSCorey Minyard
5558f3e3feSCorey Minyard /* Ignore the value if START bit is zero */
5658f3e3feSCorey Minyard if (!(value & CB_START))
5758f3e3feSCorey Minyard return;
5858f3e3feSCorey Minyard
5958f3e3feSCorey Minyard s->cycle = 0;
6058f3e3feSCorey Minyard
6158f3e3feSCorey Minyard if (!(value & CB_PD1)) {
6258f3e3feSCorey Minyard s->tb1 = 0;
6358f3e3feSCorey Minyard return;
6458f3e3feSCorey Minyard }
6558f3e3feSCorey Minyard
6658f3e3feSCorey Minyard s->tb1 = value;
6758f3e3feSCorey Minyard
6858f3e3feSCorey Minyard if (s->inputs == 8)
6958f3e3feSCorey Minyard chan = CHANNEL_NUM(value, 1, 0, 2);
7058f3e3feSCorey Minyard else
7158f3e3feSCorey Minyard chan = CHANNEL_NUM(value & ~CB_SEL0, 0, 1, 2);
7258f3e3feSCorey Minyard
7358f3e3feSCorey Minyard if (value & CB_SGL)
7458f3e3feSCorey Minyard measure = s->input[chan] - s->com;
7558f3e3feSCorey Minyard else
7658f3e3feSCorey Minyard measure = s->input[chan] - s->input[chan ^ 1];
7758f3e3feSCorey Minyard
7858f3e3feSCorey Minyard if (!(value & CB_UNI))
7958f3e3feSCorey Minyard measure ^= 0x80;
8058f3e3feSCorey Minyard
8158f3e3feSCorey Minyard s->rb2 = (measure >> 2) & 0x3f;
8258f3e3feSCorey Minyard s->rb3 = (measure << 6) & 0xc0;
8358f3e3feSCorey Minyard
8458f3e3feSCorey Minyard /* FIXME: When should the IRQ be lowered? */
8558f3e3feSCorey Minyard qemu_irq_raise(s->interrupt);
8658f3e3feSCorey Minyard }
8758f3e3feSCorey Minyard
max111x_transfer(SSIPeripheral * dev,uint32_t value)8858f3e3feSCorey Minyard static uint32_t max111x_transfer(SSIPeripheral *dev, uint32_t value)
8958f3e3feSCorey Minyard {
9058f3e3feSCorey Minyard MAX111xState *s = MAX_111X(dev);
9158f3e3feSCorey Minyard max111x_write(s, value);
9258f3e3feSCorey Minyard return max111x_read(s);
9358f3e3feSCorey Minyard }
9458f3e3feSCorey Minyard
9558f3e3feSCorey Minyard static const VMStateDescription vmstate_max111x = {
9658f3e3feSCorey Minyard .name = "max111x",
9758f3e3feSCorey Minyard .version_id = 1,
9858f3e3feSCorey Minyard .minimum_version_id = 1,
99*99367627SRichard Henderson .fields = (const VMStateField[]) {
10058f3e3feSCorey Minyard VMSTATE_SSI_PERIPHERAL(parent_obj, MAX111xState),
10158f3e3feSCorey Minyard VMSTATE_UINT8(tb1, MAX111xState),
10258f3e3feSCorey Minyard VMSTATE_UINT8(rb2, MAX111xState),
10358f3e3feSCorey Minyard VMSTATE_UINT8(rb3, MAX111xState),
10458f3e3feSCorey Minyard VMSTATE_INT32_EQUAL(inputs, MAX111xState, NULL),
10558f3e3feSCorey Minyard VMSTATE_INT32(com, MAX111xState),
10658f3e3feSCorey Minyard VMSTATE_ARRAY_INT32_UNSAFE(input, MAX111xState, inputs,
10758f3e3feSCorey Minyard vmstate_info_uint8, uint8_t),
10858f3e3feSCorey Minyard VMSTATE_END_OF_LIST()
10958f3e3feSCorey Minyard }
11058f3e3feSCorey Minyard };
11158f3e3feSCorey Minyard
max111x_input_set(void * opaque,int line,int value)11258f3e3feSCorey Minyard static void max111x_input_set(void *opaque, int line, int value)
11358f3e3feSCorey Minyard {
11458f3e3feSCorey Minyard MAX111xState *s = MAX_111X(opaque);
11558f3e3feSCorey Minyard
11658f3e3feSCorey Minyard assert(line >= 0 && line < s->inputs);
11758f3e3feSCorey Minyard s->input[line] = value;
11858f3e3feSCorey Minyard }
11958f3e3feSCorey Minyard
max111x_init(SSIPeripheral * d,int inputs)12058f3e3feSCorey Minyard static int max111x_init(SSIPeripheral *d, int inputs)
12158f3e3feSCorey Minyard {
12258f3e3feSCorey Minyard DeviceState *dev = DEVICE(d);
12358f3e3feSCorey Minyard MAX111xState *s = MAX_111X(dev);
12458f3e3feSCorey Minyard
12558f3e3feSCorey Minyard qdev_init_gpio_out(dev, &s->interrupt, 1);
12658f3e3feSCorey Minyard qdev_init_gpio_in(dev, max111x_input_set, inputs);
12758f3e3feSCorey Minyard
12858f3e3feSCorey Minyard s->inputs = inputs;
12958f3e3feSCorey Minyard
13058f3e3feSCorey Minyard return 0;
13158f3e3feSCorey Minyard }
13258f3e3feSCorey Minyard
max1110_realize(SSIPeripheral * dev,Error ** errp)13358f3e3feSCorey Minyard static void max1110_realize(SSIPeripheral *dev, Error **errp)
13458f3e3feSCorey Minyard {
13558f3e3feSCorey Minyard max111x_init(dev, 8);
13658f3e3feSCorey Minyard }
13758f3e3feSCorey Minyard
max1111_realize(SSIPeripheral * dev,Error ** errp)13858f3e3feSCorey Minyard static void max1111_realize(SSIPeripheral *dev, Error **errp)
13958f3e3feSCorey Minyard {
14058f3e3feSCorey Minyard max111x_init(dev, 4);
14158f3e3feSCorey Minyard }
14258f3e3feSCorey Minyard
max111x_reset(DeviceState * dev)14358f3e3feSCorey Minyard static void max111x_reset(DeviceState *dev)
14458f3e3feSCorey Minyard {
14558f3e3feSCorey Minyard MAX111xState *s = MAX_111X(dev);
14658f3e3feSCorey Minyard int i;
14758f3e3feSCorey Minyard
14858f3e3feSCorey Minyard for (i = 0; i < s->inputs; i++) {
14958f3e3feSCorey Minyard s->input[i] = s->reset_input[i];
15058f3e3feSCorey Minyard }
15158f3e3feSCorey Minyard s->com = 0;
15258f3e3feSCorey Minyard s->tb1 = 0;
15358f3e3feSCorey Minyard s->rb2 = 0;
15458f3e3feSCorey Minyard s->rb3 = 0;
15558f3e3feSCorey Minyard s->cycle = 0;
15658f3e3feSCorey Minyard }
15758f3e3feSCorey Minyard
15858f3e3feSCorey Minyard static Property max1110_properties[] = {
15958f3e3feSCorey Minyard /* Reset values for ADC inputs */
16058f3e3feSCorey Minyard DEFINE_PROP_UINT8("input0", MAX111xState, reset_input[0], 0xf0),
16158f3e3feSCorey Minyard DEFINE_PROP_UINT8("input1", MAX111xState, reset_input[1], 0xe0),
16258f3e3feSCorey Minyard DEFINE_PROP_UINT8("input2", MAX111xState, reset_input[2], 0xd0),
16358f3e3feSCorey Minyard DEFINE_PROP_UINT8("input3", MAX111xState, reset_input[3], 0xc0),
16458f3e3feSCorey Minyard DEFINE_PROP_END_OF_LIST(),
16558f3e3feSCorey Minyard };
16658f3e3feSCorey Minyard
16758f3e3feSCorey Minyard static Property max1111_properties[] = {
16858f3e3feSCorey Minyard /* Reset values for ADC inputs */
16958f3e3feSCorey Minyard DEFINE_PROP_UINT8("input0", MAX111xState, reset_input[0], 0xf0),
17058f3e3feSCorey Minyard DEFINE_PROP_UINT8("input1", MAX111xState, reset_input[1], 0xe0),
17158f3e3feSCorey Minyard DEFINE_PROP_UINT8("input2", MAX111xState, reset_input[2], 0xd0),
17258f3e3feSCorey Minyard DEFINE_PROP_UINT8("input3", MAX111xState, reset_input[3], 0xc0),
17358f3e3feSCorey Minyard DEFINE_PROP_UINT8("input4", MAX111xState, reset_input[4], 0xb0),
17458f3e3feSCorey Minyard DEFINE_PROP_UINT8("input5", MAX111xState, reset_input[5], 0xa0),
17558f3e3feSCorey Minyard DEFINE_PROP_UINT8("input6", MAX111xState, reset_input[6], 0x90),
17658f3e3feSCorey Minyard DEFINE_PROP_UINT8("input7", MAX111xState, reset_input[7], 0x80),
17758f3e3feSCorey Minyard DEFINE_PROP_END_OF_LIST(),
17858f3e3feSCorey Minyard };
17958f3e3feSCorey Minyard
max111x_class_init(ObjectClass * klass,void * data)18058f3e3feSCorey Minyard static void max111x_class_init(ObjectClass *klass, void *data)
18158f3e3feSCorey Minyard {
18258f3e3feSCorey Minyard SSIPeripheralClass *k = SSI_PERIPHERAL_CLASS(klass);
18358f3e3feSCorey Minyard DeviceClass *dc = DEVICE_CLASS(klass);
18458f3e3feSCorey Minyard
18558f3e3feSCorey Minyard k->transfer = max111x_transfer;
18658f3e3feSCorey Minyard dc->reset = max111x_reset;
18758f3e3feSCorey Minyard dc->vmsd = &vmstate_max111x;
18858f3e3feSCorey Minyard set_bit(DEVICE_CATEGORY_MISC, dc->categories);
18958f3e3feSCorey Minyard }
19058f3e3feSCorey Minyard
19158f3e3feSCorey Minyard static const TypeInfo max111x_info = {
19258f3e3feSCorey Minyard .name = TYPE_MAX_111X,
19358f3e3feSCorey Minyard .parent = TYPE_SSI_PERIPHERAL,
19458f3e3feSCorey Minyard .instance_size = sizeof(MAX111xState),
19558f3e3feSCorey Minyard .class_init = max111x_class_init,
19658f3e3feSCorey Minyard .abstract = true,
19758f3e3feSCorey Minyard };
19858f3e3feSCorey Minyard
max1110_class_init(ObjectClass * klass,void * data)19958f3e3feSCorey Minyard static void max1110_class_init(ObjectClass *klass, void *data)
20058f3e3feSCorey Minyard {
20158f3e3feSCorey Minyard SSIPeripheralClass *k = SSI_PERIPHERAL_CLASS(klass);
20258f3e3feSCorey Minyard DeviceClass *dc = DEVICE_CLASS(klass);
20358f3e3feSCorey Minyard
20458f3e3feSCorey Minyard k->realize = max1110_realize;
20558f3e3feSCorey Minyard device_class_set_props(dc, max1110_properties);
20658f3e3feSCorey Minyard }
20758f3e3feSCorey Minyard
20858f3e3feSCorey Minyard static const TypeInfo max1110_info = {
20958f3e3feSCorey Minyard .name = TYPE_MAX_1110,
21058f3e3feSCorey Minyard .parent = TYPE_MAX_111X,
21158f3e3feSCorey Minyard .class_init = max1110_class_init,
21258f3e3feSCorey Minyard };
21358f3e3feSCorey Minyard
max1111_class_init(ObjectClass * klass,void * data)21458f3e3feSCorey Minyard static void max1111_class_init(ObjectClass *klass, void *data)
21558f3e3feSCorey Minyard {
21658f3e3feSCorey Minyard SSIPeripheralClass *k = SSI_PERIPHERAL_CLASS(klass);
21758f3e3feSCorey Minyard DeviceClass *dc = DEVICE_CLASS(klass);
21858f3e3feSCorey Minyard
21958f3e3feSCorey Minyard k->realize = max1111_realize;
22058f3e3feSCorey Minyard device_class_set_props(dc, max1111_properties);
22158f3e3feSCorey Minyard }
22258f3e3feSCorey Minyard
22358f3e3feSCorey Minyard static const TypeInfo max1111_info = {
22458f3e3feSCorey Minyard .name = TYPE_MAX_1111,
22558f3e3feSCorey Minyard .parent = TYPE_MAX_111X,
22658f3e3feSCorey Minyard .class_init = max1111_class_init,
22758f3e3feSCorey Minyard };
22858f3e3feSCorey Minyard
max111x_register_types(void)22958f3e3feSCorey Minyard static void max111x_register_types(void)
23058f3e3feSCorey Minyard {
23158f3e3feSCorey Minyard type_register_static(&max111x_info);
23258f3e3feSCorey Minyard type_register_static(&max1110_info);
23358f3e3feSCorey Minyard type_register_static(&max1111_info);
23458f3e3feSCorey Minyard }
23558f3e3feSCorey Minyard
23658f3e3feSCorey Minyard type_init(max111x_register_types)
237