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qemu-e2k/hw/sensor/adm1266.c
Titus Rwantare 6f351a7a70 hw/sensor: add ADM1266 device model 
The ADM1266 is a cascadable super sequencer with margin control and
fault recording.
This commit adds basic support for its PMBus commands and models
the identification registers that can be modified in a firmware
update.

Reviewed-by: Hao Wu <wuhaotsh@google.com>
Acked-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Titus Rwantare <titusr@google.com>
[PMD: Cover file in MAINTAINERS]
Message-ID: <20231023-staging-pmbus-v3-v4-5-07a8cb7cd20a@google.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-11-07 13:08:49 +01:00

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/*
* Analog Devices ADM1266 Cascadable Super Sequencer with Margin Control and
* Fault Recording with PMBus
*
* https://www.analog.com/media/en/technical-documentation/data-sheets/adm1266.pdf
*
* Copyright 2023 Google LLC
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "hw/i2c/pmbus_device.h"
#include "hw/irq.h"
#include "migration/vmstate.h"
#include "qapi/error.h"
#include "qapi/visitor.h"
#include "qemu/log.h"
#include "qemu/module.h"
#define TYPE_ADM1266 "adm1266"
OBJECT_DECLARE_SIMPLE_TYPE(ADM1266State, ADM1266)
#define ADM1266_BLACKBOX_CONFIG 0xD3
#define ADM1266_PDIO_CONFIG 0xD4
#define ADM1266_READ_STATE 0xD9
#define ADM1266_READ_BLACKBOX 0xDE
#define ADM1266_SET_RTC 0xDF
#define ADM1266_GPIO_SYNC_CONFIGURATION 0xE1
#define ADM1266_BLACKBOX_INFORMATION 0xE6
#define ADM1266_PDIO_STATUS 0xE9
#define ADM1266_GPIO_STATUS 0xEA
/* Defaults */
#define ADM1266_OPERATION_DEFAULT 0x80
#define ADM1266_CAPABILITY_DEFAULT 0xA0
#define ADM1266_CAPABILITY_NO_PEC 0x20
#define ADM1266_PMBUS_REVISION_DEFAULT 0x22
#define ADM1266_MFR_ID_DEFAULT "ADI"
#define ADM1266_MFR_ID_DEFAULT_LEN 32
#define ADM1266_MFR_MODEL_DEFAULT "ADM1266-A1"
#define ADM1266_MFR_MODEL_DEFAULT_LEN 32
#define ADM1266_MFR_REVISION_DEFAULT "25"
#define ADM1266_MFR_REVISION_DEFAULT_LEN 8
#define ADM1266_NUM_PAGES 17
/**
* PAGE Index
* Page 0 VH1.
* Page 1 VH2.
* Page 2 VH3.
* Page 3 VH4.
* Page 4 VP1.
* Page 5 VP2.
* Page 6 VP3.
* Page 7 VP4.
* Page 8 VP5.
* Page 9 VP6.
* Page 10 VP7.
* Page 11 VP8.
* Page 12 VP9.
* Page 13 VP10.
* Page 14 VP11.
* Page 15 VP12.
* Page 16 VP13.
*/
typedef struct ADM1266State {
PMBusDevice parent;
char mfr_id[32];
char mfr_model[32];
char mfr_rev[8];
} ADM1266State;
static const uint8_t adm1266_ic_device_id[] = {0x03, 0x41, 0x12, 0x66};
static const uint8_t adm1266_ic_device_rev[] = {0x08, 0x01, 0x08, 0x07, 0x0,
0x0, 0x07, 0x41, 0x30};
static void adm1266_exit_reset(Object *obj)
{
ADM1266State *s = ADM1266(obj);
PMBusDevice *pmdev = PMBUS_DEVICE(obj);
pmdev->page = 0;
pmdev->capability = ADM1266_CAPABILITY_NO_PEC;
for (int i = 0; i < ADM1266_NUM_PAGES; i++) {
pmdev->pages[i].operation = ADM1266_OPERATION_DEFAULT;
pmdev->pages[i].revision = ADM1266_PMBUS_REVISION_DEFAULT;
pmdev->pages[i].vout_mode = 0;
pmdev->pages[i].read_vout = pmbus_data2linear_mode(12, 0);
pmdev->pages[i].vout_margin_high = pmbus_data2linear_mode(15, 0);
pmdev->pages[i].vout_margin_low = pmbus_data2linear_mode(3, 0);
pmdev->pages[i].vout_ov_fault_limit = pmbus_data2linear_mode(16, 0);
pmdev->pages[i].revision = ADM1266_PMBUS_REVISION_DEFAULT;
}
strncpy(s->mfr_id, ADM1266_MFR_ID_DEFAULT, 4);
strncpy(s->mfr_model, ADM1266_MFR_MODEL_DEFAULT, 11);
strncpy(s->mfr_rev, ADM1266_MFR_REVISION_DEFAULT, 3);
}
static uint8_t adm1266_read_byte(PMBusDevice *pmdev)
{
ADM1266State *s = ADM1266(pmdev);
switch (pmdev->code) {
case PMBUS_MFR_ID: /* R/W block */
pmbus_send_string(pmdev, s->mfr_id);
break;
case PMBUS_MFR_MODEL: /* R/W block */
pmbus_send_string(pmdev, s->mfr_model);
break;
case PMBUS_MFR_REVISION: /* R/W block */
pmbus_send_string(pmdev, s->mfr_rev);
break;
case PMBUS_IC_DEVICE_ID:
pmbus_send(pmdev, adm1266_ic_device_id, sizeof(adm1266_ic_device_id));
break;
case PMBUS_IC_DEVICE_REV:
pmbus_send(pmdev, adm1266_ic_device_rev, sizeof(adm1266_ic_device_rev));
break;
default:
qemu_log_mask(LOG_UNIMP,
"%s: reading from unimplemented register: 0x%02x\n",
__func__, pmdev->code);
return 0xFF;
}
return 0;
}
static int adm1266_write_data(PMBusDevice *pmdev, const uint8_t *buf,
uint8_t len)
{
ADM1266State *s = ADM1266(pmdev);
switch (pmdev->code) {
case PMBUS_MFR_ID: /* R/W block */
pmbus_receive_block(pmdev, (uint8_t *)s->mfr_id, sizeof(s->mfr_id));
break;
case PMBUS_MFR_MODEL: /* R/W block */
pmbus_receive_block(pmdev, (uint8_t *)s->mfr_model,
sizeof(s->mfr_model));
break;
case PMBUS_MFR_REVISION: /* R/W block*/
pmbus_receive_block(pmdev, (uint8_t *)s->mfr_rev, sizeof(s->mfr_rev));
break;
case ADM1266_SET_RTC: /* do nothing */
break;
default:
qemu_log_mask(LOG_UNIMP,
"%s: writing to unimplemented register: 0x%02x\n",
__func__, pmdev->code);
break;
}
return 0;
}
static void adm1266_get(Object *obj, Visitor *v, const char *name, void *opaque,
Error **errp)
{
uint16_t value;
PMBusDevice *pmdev = PMBUS_DEVICE(obj);
PMBusVoutMode *mode = (PMBusVoutMode *)&pmdev->pages[0].vout_mode;
if (strcmp(name, "vout") == 0) {
value = pmbus_linear_mode2data(*(uint16_t *)opaque, mode->exp);
} else {
value = *(uint16_t *)opaque;
}
visit_type_uint16(v, name, &value, errp);
}
static void adm1266_set(Object *obj, Visitor *v, const char *name, void *opaque,
Error **errp)
{
uint16_t *internal = opaque;
uint16_t value;
PMBusDevice *pmdev = PMBUS_DEVICE(obj);
PMBusVoutMode *mode = (PMBusVoutMode *)&pmdev->pages[0].vout_mode;
if (!visit_type_uint16(v, name, &value, errp)) {
return;
}
*internal = pmbus_data2linear_mode(value, mode->exp);
pmbus_check_limits(pmdev);
}
static const VMStateDescription vmstate_adm1266 = {
.name = "ADM1266",
.version_id = 0,
.minimum_version_id = 0,
.fields = (VMStateField[]){
VMSTATE_PMBUS_DEVICE(parent, ADM1266State),
VMSTATE_END_OF_LIST()
}
};
static void adm1266_init(Object *obj)
{
PMBusDevice *pmdev = PMBUS_DEVICE(obj);
uint64_t flags = PB_HAS_VOUT_MODE | PB_HAS_VOUT | PB_HAS_VOUT_MARGIN |
PB_HAS_VOUT_RATING | PB_HAS_STATUS_MFR_SPECIFIC;
for (int i = 0; i < ADM1266_NUM_PAGES; i++) {
pmbus_page_config(pmdev, i, flags);
object_property_add(obj, "vout[*]", "uint16",
adm1266_get,
adm1266_set, NULL, &pmdev->pages[i].read_vout);
}
}
static void adm1266_class_init(ObjectClass *klass, void *data)
{
ResettableClass *rc = RESETTABLE_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
PMBusDeviceClass *k = PMBUS_DEVICE_CLASS(klass);
dc->desc = "Analog Devices ADM1266 Hot Swap controller";
dc->vmsd = &vmstate_adm1266;
k->write_data = adm1266_write_data;
k->receive_byte = adm1266_read_byte;
k->device_num_pages = 17;
rc->phases.exit = adm1266_exit_reset;
}
static const TypeInfo adm1266_info = {
.name = TYPE_ADM1266,
.parent = TYPE_PMBUS_DEVICE,
.instance_size = sizeof(ADM1266State),
.instance_init = adm1266_init,
.class_init = adm1266_class_init,
};
static void adm1266_register_types(void)
{
type_register_static(&adm1266_info);
}
type_init(adm1266_register_types)
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