| /* |
| * Analog Devices ADM1272 High Voltage Positive Hot Swap Controller and Digital |
| * Power Monitor with PMBus |
| * |
| * Copyright 2021 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_ADM1272 "adm1272" |
| #define ADM1272(obj) OBJECT_CHECK(ADM1272State, (obj), TYPE_ADM1272) |
| |
| #define ADM1272_RESTART_TIME 0xCC |
| #define ADM1272_MFR_PEAK_IOUT 0xD0 |
| #define ADM1272_MFR_PEAK_VIN 0xD1 |
| #define ADM1272_MFR_PEAK_VOUT 0xD2 |
| #define ADM1272_MFR_PMON_CONTROL 0xD3 |
| #define ADM1272_MFR_PMON_CONFIG 0xD4 |
| #define ADM1272_MFR_ALERT1_CONFIG 0xD5 |
| #define ADM1272_MFR_ALERT2_CONFIG 0xD6 |
| #define ADM1272_MFR_PEAK_TEMPERATURE 0xD7 |
| #define ADM1272_MFR_DEVICE_CONFIG 0xD8 |
| #define ADM1272_MFR_POWER_CYCLE 0xD9 |
| #define ADM1272_MFR_PEAK_PIN 0xDA |
| #define ADM1272_MFR_READ_PIN_EXT 0xDB |
| #define ADM1272_MFR_READ_EIN_EXT 0xDC |
| |
| #define ADM1272_HYSTERESIS_LOW 0xF2 |
| #define ADM1272_HYSTERESIS_HIGH 0xF3 |
| #define ADM1272_STATUS_HYSTERESIS 0xF4 |
| #define ADM1272_STATUS_GPIO 0xF5 |
| #define ADM1272_STRT_UP_IOUT_LIM 0xF6 |
| |
| /* Defaults */ |
| #define ADM1272_OPERATION_DEFAULT 0x80 |
| #define ADM1272_CAPABILITY_DEFAULT 0xB0 |
| #define ADM1272_CAPABILITY_NO_PEC 0x30 |
| #define ADM1272_DIRECT_MODE 0x40 |
| #define ADM1272_HIGH_LIMIT_DEFAULT 0x0FFF |
| #define ADM1272_PIN_OP_DEFAULT 0x7FFF |
| #define ADM1272_PMBUS_REVISION_DEFAULT 0x22 |
| #define ADM1272_MFR_ID_DEFAULT "ADI" |
| #define ADM1272_MODEL_DEFAULT "ADM1272-A1" |
| #define ADM1272_MFR_DEFAULT_REVISION "25" |
| #define ADM1272_DEFAULT_DATE "160301" |
| #define ADM1272_RESTART_TIME_DEFAULT 0x64 |
| #define ADM1272_PMON_CONTROL_DEFAULT 0x1 |
| #define ADM1272_PMON_CONFIG_DEFAULT 0x3F35 |
| #define ADM1272_DEVICE_CONFIG_DEFAULT 0x8 |
| #define ADM1272_HYSTERESIS_HIGH_DEFAULT 0xFFFF |
| #define ADM1272_STRT_UP_IOUT_LIM_DEFAULT 0x000F |
| #define ADM1272_VOLT_DEFAULT 12000 |
| #define ADM1272_IOUT_DEFAULT 25000 |
| #define ADM1272_PWR_DEFAULT 300 /* 12V 25A */ |
| #define ADM1272_SHUNT 300 /* micro-ohms */ |
| #define ADM1272_VOLTAGE_COEFF_DEFAULT 1 |
| #define ADM1272_CURRENT_COEFF_DEFAULT 3 |
| #define ADM1272_PWR_COEFF_DEFAULT 7 |
| #define ADM1272_IOUT_OFFSET 0x5000 |
| #define ADM1272_IOUT_OFFSET 0x5000 |
| |
| |
| typedef struct ADM1272State { |
| PMBusDevice parent; |
| |
| uint64_t ein_ext; |
| uint32_t pin_ext; |
| uint8_t restart_time; |
| |
| uint16_t peak_vin; |
| uint16_t peak_vout; |
| uint16_t peak_iout; |
| uint16_t peak_temperature; |
| uint16_t peak_pin; |
| |
| uint8_t pmon_control; |
| uint16_t pmon_config; |
| uint16_t alert1_config; |
| uint16_t alert2_config; |
| uint16_t device_config; |
| |
| uint16_t hysteresis_low; |
| uint16_t hysteresis_high; |
| uint8_t status_hysteresis; |
| uint8_t status_gpio; |
| |
| uint16_t strt_up_iout_lim; |
| |
| } ADM1272State; |
| |
| static const PMBusCoefficients adm1272_coefficients[] = { |
| [0] = { 6770, 0, -2 }, /* voltage, vrange 60V */ |
| [1] = { 4062, 0, -2 }, /* voltage, vrange 100V */ |
| [2] = { 1326, 20480, -1 }, /* current, vsense range 15mV */ |
| [3] = { 663, 20480, -1 }, /* current, vsense range 30mV */ |
| [4] = { 3512, 0, -2 }, /* power, vrange 60V, irange 15mV */ |
| [5] = { 21071, 0, -3 }, /* power, vrange 100V, irange 15mV */ |
| [6] = { 17561, 0, -3 }, /* power, vrange 60V, irange 30mV */ |
| [7] = { 10535, 0, -3 }, /* power, vrange 100V, irange 30mV */ |
| [8] = { 42, 31871, -1 }, /* temperature */ |
| }; |
| |
| static void adm1272_check_limits(ADM1272State *s) |
| { |
| PMBusDevice *pmdev = PMBUS_DEVICE(s); |
| |
| pmbus_check_limits(pmdev); |
| |
| if (pmdev->pages[0].read_vout > s->peak_vout) { |
| s->peak_vout = pmdev->pages[0].read_vout; |
| } |
| |
| if (pmdev->pages[0].read_vin > s->peak_vin) { |
| s->peak_vin = pmdev->pages[0].read_vin; |
| } |
| |
| if (pmdev->pages[0].read_iout > s->peak_iout) { |
| s->peak_iout = pmdev->pages[0].read_iout; |
| } |
| |
| if (pmdev->pages[0].read_temperature_1 > s->peak_temperature) { |
| s->peak_temperature = pmdev->pages[0].read_temperature_1; |
| } |
| |
| if (pmdev->pages[0].read_pin > s->peak_pin) { |
| s->peak_pin = pmdev->pages[0].read_pin; |
| } |
| } |
| |
| static uint16_t adm1272_millivolts_to_direct(uint32_t value) |
| { |
| PMBusCoefficients c = adm1272_coefficients[ADM1272_VOLTAGE_COEFF_DEFAULT]; |
| c.b = c.b * 1000; |
| c.R = c.R - 3; |
| return pmbus_data2direct_mode(c, value); |
| } |
| |
| static uint32_t adm1272_direct_to_millivolts(uint16_t value) |
| { |
| PMBusCoefficients c = adm1272_coefficients[ADM1272_VOLTAGE_COEFF_DEFAULT]; |
| c.b = c.b * 1000; |
| c.R = c.R - 3; |
| return pmbus_direct_mode2data(c, value); |
| } |
| |
| static uint16_t adm1272_milliamps_to_direct(uint32_t value) |
| { |
| PMBusCoefficients c = adm1272_coefficients[ADM1272_CURRENT_COEFF_DEFAULT]; |
| /* Y = (m * r_sense * x - b) * 10^R */ |
| c.m = c.m * ADM1272_SHUNT / 1000; /* micro-ohms */ |
| c.b = c.b * 1000; |
| c.R = c.R - 3; |
| return pmbus_data2direct_mode(c, value); |
| } |
| |
| static uint32_t adm1272_direct_to_milliamps(uint16_t value) |
| { |
| PMBusCoefficients c = adm1272_coefficients[ADM1272_CURRENT_COEFF_DEFAULT]; |
| c.m = c.m * ADM1272_SHUNT / 1000; |
| c.b = c.b * 1000; |
| c.R = c.R - 3; |
| return pmbus_direct_mode2data(c, value); |
| } |
| |
| static uint16_t adm1272_watts_to_direct(uint32_t value) |
| { |
| PMBusCoefficients c = adm1272_coefficients[ADM1272_PWR_COEFF_DEFAULT]; |
| c.m = c.m * ADM1272_SHUNT / 1000; |
| return pmbus_data2direct_mode(c, value); |
| } |
| |
| static uint32_t adm1272_direct_to_watts(uint16_t value) |
| { |
| PMBusCoefficients c = adm1272_coefficients[ADM1272_PWR_COEFF_DEFAULT]; |
| c.m = c.m * ADM1272_SHUNT / 1000; |
| return pmbus_direct_mode2data(c, value); |
| } |
| |
| static void adm1272_exit_reset(Object *obj) |
| { |
| ADM1272State *s = ADM1272(obj); |
| PMBusDevice *pmdev = PMBUS_DEVICE(obj); |
| |
| pmdev->page = 0; |
| pmdev->pages[0].operation = ADM1272_OPERATION_DEFAULT; |
| |
| |
| pmdev->capability = ADM1272_CAPABILITY_NO_PEC; |
| pmdev->pages[0].revision = ADM1272_PMBUS_REVISION_DEFAULT; |
| pmdev->pages[0].vout_mode = ADM1272_DIRECT_MODE; |
| pmdev->pages[0].vout_ov_warn_limit = ADM1272_HIGH_LIMIT_DEFAULT; |
| pmdev->pages[0].vout_uv_warn_limit = 0; |
| pmdev->pages[0].iout_oc_warn_limit = ADM1272_HIGH_LIMIT_DEFAULT; |
| pmdev->pages[0].ot_fault_limit = ADM1272_HIGH_LIMIT_DEFAULT; |
| pmdev->pages[0].ot_warn_limit = ADM1272_HIGH_LIMIT_DEFAULT; |
| pmdev->pages[0].vin_ov_warn_limit = ADM1272_HIGH_LIMIT_DEFAULT; |
| pmdev->pages[0].vin_uv_warn_limit = 0; |
| pmdev->pages[0].pin_op_warn_limit = ADM1272_PIN_OP_DEFAULT; |
| |
| pmdev->pages[0].status_word = 0; |
| pmdev->pages[0].status_vout = 0; |
| pmdev->pages[0].status_iout = 0; |
| pmdev->pages[0].status_input = 0; |
| pmdev->pages[0].status_temperature = 0; |
| pmdev->pages[0].status_mfr_specific = 0; |
| |
| pmdev->pages[0].read_vin |
| = adm1272_millivolts_to_direct(ADM1272_VOLT_DEFAULT); |
| pmdev->pages[0].read_vout |
| = adm1272_millivolts_to_direct(ADM1272_VOLT_DEFAULT); |
| pmdev->pages[0].read_iout |
| = adm1272_milliamps_to_direct(ADM1272_IOUT_DEFAULT); |
| pmdev->pages[0].read_temperature_1 = 0; |
| pmdev->pages[0].read_pin = adm1272_watts_to_direct(ADM1272_PWR_DEFAULT); |
| pmdev->pages[0].revision = ADM1272_PMBUS_REVISION_DEFAULT; |
| pmdev->pages[0].mfr_id = ADM1272_MFR_ID_DEFAULT; |
| pmdev->pages[0].mfr_model = ADM1272_MODEL_DEFAULT; |
| pmdev->pages[0].mfr_revision = ADM1272_MFR_DEFAULT_REVISION; |
| pmdev->pages[0].mfr_date = ADM1272_DEFAULT_DATE; |
| |
| s->pin_ext = 0; |
| s->ein_ext = 0; |
| s->restart_time = ADM1272_RESTART_TIME_DEFAULT; |
| |
| s->peak_vin = 0; |
| s->peak_vout = 0; |
| s->peak_iout = 0; |
| s->peak_temperature = 0; |
| s->peak_pin = 0; |
| |
| s->pmon_control = ADM1272_PMON_CONTROL_DEFAULT; |
| s->pmon_config = ADM1272_PMON_CONFIG_DEFAULT; |
| s->alert1_config = 0; |
| s->alert2_config = 0; |
| s->device_config = ADM1272_DEVICE_CONFIG_DEFAULT; |
| |
| s->hysteresis_low = 0; |
| s->hysteresis_high = ADM1272_HYSTERESIS_HIGH_DEFAULT; |
| s->status_hysteresis = 0; |
| s->status_gpio = 0; |
| |
| s->strt_up_iout_lim = ADM1272_STRT_UP_IOUT_LIM_DEFAULT; |
| } |
| |
| static uint8_t adm1272_read_byte(PMBusDevice *pmdev) |
| { |
| ADM1272State *s = ADM1272(pmdev); |
| |
| switch (pmdev->code) { |
| case ADM1272_RESTART_TIME: |
| pmbus_send8(pmdev, s->restart_time); |
| break; |
| |
| case ADM1272_MFR_PEAK_IOUT: |
| pmbus_send16(pmdev, s->peak_iout); |
| break; |
| |
| case ADM1272_MFR_PEAK_VIN: |
| pmbus_send16(pmdev, s->peak_vin); |
| break; |
| |
| case ADM1272_MFR_PEAK_VOUT: |
| pmbus_send16(pmdev, s->peak_vout); |
| break; |
| |
| case ADM1272_MFR_PMON_CONTROL: |
| pmbus_send8(pmdev, s->pmon_control); |
| break; |
| |
| case ADM1272_MFR_PMON_CONFIG: |
| pmbus_send16(pmdev, s->pmon_config); |
| break; |
| |
| case ADM1272_MFR_ALERT1_CONFIG: |
| pmbus_send16(pmdev, s->alert1_config); |
| break; |
| |
| case ADM1272_MFR_ALERT2_CONFIG: |
| pmbus_send16(pmdev, s->alert2_config); |
| break; |
| |
| case ADM1272_MFR_PEAK_TEMPERATURE: |
| pmbus_send16(pmdev, s->peak_temperature); |
| break; |
| |
| case ADM1272_MFR_DEVICE_CONFIG: |
| pmbus_send16(pmdev, s->device_config); |
| break; |
| |
| case ADM1272_MFR_PEAK_PIN: |
| pmbus_send16(pmdev, s->peak_pin); |
| break; |
| |
| case ADM1272_MFR_READ_PIN_EXT: |
| pmbus_send32(pmdev, s->pin_ext); |
| break; |
| |
| case ADM1272_MFR_READ_EIN_EXT: |
| pmbus_send64(pmdev, s->ein_ext); |
| break; |
| |
| case ADM1272_HYSTERESIS_LOW: |
| pmbus_send16(pmdev, s->hysteresis_low); |
| break; |
| |
| case ADM1272_HYSTERESIS_HIGH: |
| pmbus_send16(pmdev, s->hysteresis_high); |
| break; |
| |
| case ADM1272_STATUS_HYSTERESIS: |
| pmbus_send16(pmdev, s->status_hysteresis); |
| break; |
| |
| case ADM1272_STATUS_GPIO: |
| pmbus_send16(pmdev, s->status_gpio); |
| break; |
| |
| case ADM1272_STRT_UP_IOUT_LIM: |
| pmbus_send16(pmdev, s->strt_up_iout_lim); |
| break; |
| |
| default: |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: reading from unsupported register: 0x%02x\n", |
| __func__, pmdev->code); |
| return 0xFF; |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int adm1272_write_data(PMBusDevice *pmdev, const uint8_t *buf, |
| uint8_t len) |
| { |
| ADM1272State *s = ADM1272(pmdev); |
| |
| if (len == 0) { |
| qemu_log_mask(LOG_GUEST_ERROR, "%s: writing empty data\n", __func__); |
| return -1; |
| } |
| |
| pmdev->code = buf[0]; /* PMBus command code */ |
| |
| if (len == 1) { |
| return 0; |
| } |
| |
| /* Exclude command code from buffer */ |
| buf++; |
| len--; |
| |
| switch (pmdev->code) { |
| |
| case ADM1272_RESTART_TIME: |
| s->restart_time = pmbus_receive8(pmdev); |
| break; |
| |
| case ADM1272_MFR_PMON_CONTROL: |
| s->pmon_control = pmbus_receive8(pmdev); |
| break; |
| |
| case ADM1272_MFR_PMON_CONFIG: |
| s->pmon_config = pmbus_receive16(pmdev); |
| break; |
| |
| case ADM1272_MFR_ALERT1_CONFIG: |
| s->alert1_config = pmbus_receive16(pmdev); |
| break; |
| |
| case ADM1272_MFR_ALERT2_CONFIG: |
| s->alert2_config = pmbus_receive16(pmdev); |
| break; |
| |
| case ADM1272_MFR_DEVICE_CONFIG: |
| s->device_config = pmbus_receive16(pmdev); |
| break; |
| |
| case ADM1272_MFR_POWER_CYCLE: |
| adm1272_exit_reset((Object *)s); |
| break; |
| |
| case ADM1272_HYSTERESIS_LOW: |
| s->hysteresis_low = pmbus_receive16(pmdev); |
| break; |
| |
| case ADM1272_HYSTERESIS_HIGH: |
| s->hysteresis_high = pmbus_receive16(pmdev); |
| break; |
| |
| case ADM1272_STRT_UP_IOUT_LIM: |
| s->strt_up_iout_lim = pmbus_receive16(pmdev); |
| adm1272_check_limits(s); |
| break; |
| |
| default: |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: writing to unsupported register: 0x%02x\n", |
| __func__, pmdev->code); |
| break; |
| } |
| return 0; |
| } |
| |
| static void adm1272_get(Object *obj, Visitor *v, const char *name, void *opaque, |
| Error **errp) |
| { |
| uint16_t value; |
| |
| if (strcmp(name, "vin") == 0 || strcmp(name, "vout") == 0) { |
| value = adm1272_direct_to_millivolts(*(uint16_t *)opaque); |
| } else if (strcmp(name, "iout") == 0) { |
| value = adm1272_direct_to_milliamps(*(uint16_t *)opaque); |
| } else if (strcmp(name, "pin") == 0) { |
| value = adm1272_direct_to_watts(*(uint16_t *)opaque); |
| } else { |
| value = *(uint16_t *)opaque; |
| } |
| |
| visit_type_uint16(v, name, &value, errp); |
| } |
| |
| static void adm1272_set(Object *obj, Visitor *v, const char *name, void *opaque, |
| Error **errp) |
| { |
| ADM1272State *s = ADM1272(obj); |
| uint16_t *internal = opaque; |
| uint16_t value; |
| |
| if (!visit_type_uint16(v, name, &value, errp)) { |
| return; |
| } |
| |
| if (strcmp(name, "vin") == 0 || strcmp(name, "vout") == 0) { |
| *internal = adm1272_millivolts_to_direct(value); |
| } else if (strcmp(name, "iout") == 0) { |
| *internal = adm1272_milliamps_to_direct(value); |
| } else if (strcmp(name, "pin") == 0) { |
| *internal = adm1272_watts_to_direct(value); |
| } else { |
| *internal = value; |
| } |
| |
| adm1272_check_limits(s); |
| } |
| |
| static const VMStateDescription vmstate_adm1272 = { |
| .name = "ADM1272", |
| .version_id = 0, |
| .minimum_version_id = 0, |
| .fields = (const VMStateField[]){ |
| VMSTATE_PMBUS_DEVICE(parent, ADM1272State), |
| VMSTATE_UINT64(ein_ext, ADM1272State), |
| VMSTATE_UINT32(pin_ext, ADM1272State), |
| VMSTATE_UINT8(restart_time, ADM1272State), |
| |
| VMSTATE_UINT16(peak_vin, ADM1272State), |
| VMSTATE_UINT16(peak_vout, ADM1272State), |
| VMSTATE_UINT16(peak_iout, ADM1272State), |
| VMSTATE_UINT16(peak_temperature, ADM1272State), |
| VMSTATE_UINT16(peak_pin, ADM1272State), |
| |
| VMSTATE_UINT8(pmon_control, ADM1272State), |
| VMSTATE_UINT16(pmon_config, ADM1272State), |
| VMSTATE_UINT16(alert1_config, ADM1272State), |
| VMSTATE_UINT16(alert2_config, ADM1272State), |
| VMSTATE_UINT16(device_config, ADM1272State), |
| |
| VMSTATE_UINT16(hysteresis_low, ADM1272State), |
| VMSTATE_UINT16(hysteresis_high, ADM1272State), |
| VMSTATE_UINT8(status_hysteresis, ADM1272State), |
| VMSTATE_UINT8(status_gpio, ADM1272State), |
| |
| VMSTATE_UINT16(strt_up_iout_lim, ADM1272State), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static void adm1272_init(Object *obj) |
| { |
| PMBusDevice *pmdev = PMBUS_DEVICE(obj); |
| uint64_t flags = PB_HAS_VOUT_MODE | PB_HAS_VOUT | PB_HAS_VIN | PB_HAS_IOUT | |
| PB_HAS_PIN | PB_HAS_TEMPERATURE | PB_HAS_MFR_INFO; |
| |
| pmbus_page_config(pmdev, 0, flags); |
| |
| object_property_add(obj, "vin", "uint16", |
| adm1272_get, |
| adm1272_set, NULL, &pmdev->pages[0].read_vin); |
| |
| object_property_add(obj, "vout", "uint16", |
| adm1272_get, |
| adm1272_set, NULL, &pmdev->pages[0].read_vout); |
| |
| object_property_add(obj, "iout", "uint16", |
| adm1272_get, |
| adm1272_set, NULL, &pmdev->pages[0].read_iout); |
| |
| object_property_add(obj, "pin", "uint16", |
| adm1272_get, |
| adm1272_set, NULL, &pmdev->pages[0].read_pin); |
| |
| } |
| |
| static void adm1272_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 ADM1272 Hot Swap controller"; |
| dc->vmsd = &vmstate_adm1272; |
| k->write_data = adm1272_write_data; |
| k->receive_byte = adm1272_read_byte; |
| k->device_num_pages = 1; |
| |
| rc->phases.exit = adm1272_exit_reset; |
| } |
| |
| static const TypeInfo adm1272_info = { |
| .name = TYPE_ADM1272, |
| .parent = TYPE_PMBUS_DEVICE, |
| .instance_size = sizeof(ADM1272State), |
| .instance_init = adm1272_init, |
| .class_init = adm1272_class_init, |
| }; |
| |
| static void adm1272_register_types(void) |
| { |
| type_register_static(&adm1272_info); |
| } |
| |
| type_init(adm1272_register_types) |
