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linux_dsm_epyc7002/drivers/hwmon/pmbus/adm1275.c
Guenter Roeck 68a4038236 hwmon: (adm1275) Add support for ADM1293 and ADM1294 
ADM1293 and ADM1294 are mostly compatible with other chips of the same
series, but have more configuration options. There are also some
differences in register details.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2015-08-09 13:44:27 -07:00

558 lines
15 KiB
C
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/*
* Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller
* and Digital Power Monitor
*
* Copyright (c) 2011 Ericsson AB.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/bitops.h>
#include "pmbus.h"
enum chips { adm1075, adm1275, adm1276, adm1293, adm1294 };
#define ADM1275_MFR_STATUS_IOUT_WARN2 BIT(0)
#define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5)
#define ADM1293_MFR_STATUS_VAUX_OV_WARN BIT(6)
#define ADM1275_PEAK_IOUT 0xd0
#define ADM1275_PEAK_VIN 0xd1
#define ADM1275_PEAK_VOUT 0xd2
#define ADM1275_PMON_CONFIG 0xd4
#define ADM1275_VIN_VOUT_SELECT BIT(6)
#define ADM1275_VRANGE BIT(5)
#define ADM1075_IRANGE_50 BIT(4)
#define ADM1075_IRANGE_25 BIT(3)
#define ADM1075_IRANGE_MASK (BIT(3) | BIT(4))
#define ADM1293_IRANGE_25 0
#define ADM1293_IRANGE_50 BIT(6)
#define ADM1293_IRANGE_100 BIT(7)
#define ADM1293_IRANGE_200 (BIT(6) | BIT(7))
#define ADM1293_IRANGE_MASK (BIT(6) | BIT(7))
#define ADM1293_VIN_SEL_012 BIT(2)
#define ADM1293_VIN_SEL_074 BIT(3)
#define ADM1293_VIN_SEL_210 (BIT(2) | BIT(3))
#define ADM1293_VIN_SEL_MASK (BIT(2) | BIT(3))
#define ADM1293_VAUX_EN BIT(1)
#define ADM1275_IOUT_WARN2_LIMIT 0xd7
#define ADM1275_DEVICE_CONFIG 0xd8
#define ADM1275_IOUT_WARN2_SELECT BIT(4)
#define ADM1276_PEAK_PIN 0xda
#define ADM1075_READ_VAUX 0xdd
#define ADM1075_VAUX_OV_WARN_LIMIT 0xde
#define ADM1075_VAUX_UV_WARN_LIMIT 0xdf
#define ADM1293_IOUT_MIN 0xe3
#define ADM1293_PIN_MIN 0xe4
#define ADM1075_VAUX_STATUS 0xf6
#define ADM1075_VAUX_OV_WARN BIT(7)
#define ADM1075_VAUX_UV_WARN BIT(6)
struct adm1275_data {
int id;
bool have_oc_fault;
bool have_uc_fault;
bool have_vout;
bool have_vaux_status;
bool have_mfr_vaux_status;
bool have_iout_min;
bool have_pin_min;
bool have_pin_max;
struct pmbus_driver_info info;
};
#define to_adm1275_data(x) container_of(x, struct adm1275_data, info)
struct coefficients {
s16 m;
s16 b;
s16 R;
};
static const struct coefficients adm1075_coefficients[] = {
[0] = { 27169, 0, -1 }, /* voltage */
[1] = { 806, 20475, -1 }, /* current, irange25 */
[2] = { 404, 20475, -1 }, /* current, irange50 */
[3] = { 0, -1, 8549 }, /* power, irange25 */
[4] = { 0, -1, 4279 }, /* power, irange50 */
};
static const struct coefficients adm1275_coefficients[] = {
[0] = { 19199, 0, -2 }, /* voltage, vrange set */
[1] = { 6720, 0, -1 }, /* voltage, vrange not set */
[2] = { 807, 20475, -1 }, /* current */
};
static const struct coefficients adm1276_coefficients[] = {
[0] = { 19199, 0, -2 }, /* voltage, vrange set */
[1] = { 6720, 0, -1 }, /* voltage, vrange not set */
[2] = { 807, 20475, -1 }, /* current */
[3] = { 6043, 0, -2 }, /* power, vrange set */
[4] = { 2115, 0, -1 }, /* power, vrange not set */
};
static const struct coefficients adm1293_coefficients[] = {
[0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */
[1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */
[2] = { 19604, -50, -2 }, /* voltage, vrange 21V */
[3] = { 8000, -100, -2 }, /* current, irange25 */
[4] = { 4000, -100, -2 }, /* current, irange50 */
[5] = { 20000, -1000, -3 }, /* current, irange100 */
[6] = { 10000, -1000, -3 }, /* current, irange200 */
[7] = { 10417, 0, -1 }, /* power, 1.2V, irange25 */
[8] = { 5208, 0, -1 }, /* power, 1.2V, irange50 */
[9] = { 26042, 0, -2 }, /* power, 1.2V, irange100 */
[10] = { 13021, 0, -2 }, /* power, 1.2V, irange200 */
[11] = { 17351, 0, -2 }, /* power, 7.4V, irange25 */
[12] = { 8676, 0, -2 }, /* power, 7.4V, irange50 */
[13] = { 4338, 0, -2 }, /* power, 7.4V, irange100 */
[14] = { 21689, 0, -3 }, /* power, 7.4V, irange200 */
[15] = { 6126, 0, -2 }, /* power, 21V, irange25 */
[16] = { 30631, 0, -3 }, /* power, 21V, irange50 */
[17] = { 15316, 0, -3 }, /* power, 21V, irange100 */
[18] = { 7658, 0, -3 }, /* power, 21V, irange200 */
};
static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
{
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
const struct adm1275_data *data = to_adm1275_data(info);
int ret = 0;
if (page)
return -ENXIO;
switch (reg) {
case PMBUS_IOUT_UC_FAULT_LIMIT:
if (!data->have_uc_fault)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
break;
case PMBUS_IOUT_OC_FAULT_LIMIT:
if (!data->have_oc_fault)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
break;
case PMBUS_VOUT_OV_WARN_LIMIT:
if (data->have_vout)
return -ENODATA;
ret = pmbus_read_word_data(client, 0,
ADM1075_VAUX_OV_WARN_LIMIT);
break;
case PMBUS_VOUT_UV_WARN_LIMIT:
if (data->have_vout)
return -ENODATA;
ret = pmbus_read_word_data(client, 0,
ADM1075_VAUX_UV_WARN_LIMIT);
break;
case PMBUS_READ_VOUT:
if (data->have_vout)
return -ENODATA;
ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX);
break;
case PMBUS_VIRT_READ_IOUT_MIN:
if (!data->have_iout_min)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, ADM1293_IOUT_MIN);
break;
case PMBUS_VIRT_READ_IOUT_MAX:
ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT);
break;
case PMBUS_VIRT_READ_VOUT_MAX:
ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VOUT);
break;
case PMBUS_VIRT_READ_VIN_MAX:
ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
break;
case PMBUS_VIRT_READ_PIN_MIN:
if (!data->have_pin_min)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, ADM1293_PIN_MIN);
break;
case PMBUS_VIRT_READ_PIN_MAX:
if (!data->have_pin_max)
return -ENXIO;
ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN);
break;
case PMBUS_VIRT_RESET_IOUT_HISTORY:
case PMBUS_VIRT_RESET_VOUT_HISTORY:
case PMBUS_VIRT_RESET_VIN_HISTORY:
break;
case PMBUS_VIRT_RESET_PIN_HISTORY:
if (!data->have_pin_max)
return -ENXIO;
break;
default:
ret = -ENODATA;
break;
}
return ret;
}
static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
u16 word)
{
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
const struct adm1275_data *data = to_adm1275_data(info);
int ret;
if (page)
return -ENXIO;
switch (reg) {
case PMBUS_IOUT_UC_FAULT_LIMIT:
case PMBUS_IOUT_OC_FAULT_LIMIT:
ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT,
word);
break;
case PMBUS_VIRT_RESET_IOUT_HISTORY:
ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
if (!ret && data->have_iout_min)
ret = pmbus_write_word_data(client, 0,
ADM1293_IOUT_MIN, 0);
break;
case PMBUS_VIRT_RESET_VOUT_HISTORY:
ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
break;
case PMBUS_VIRT_RESET_VIN_HISTORY:
ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
break;
case PMBUS_VIRT_RESET_PIN_HISTORY:
ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
if (!ret && data->have_pin_min)
ret = pmbus_write_word_data(client, 0,
ADM1293_PIN_MIN, 0);
break;
default:
ret = -ENODATA;
break;
}
return ret;
}
static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
{
const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
const struct adm1275_data *data = to_adm1275_data(info);
int mfr_status, ret;
if (page > 0)
return -ENXIO;
switch (reg) {
case PMBUS_STATUS_IOUT:
ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
if (ret < 0)
break;
if (!data->have_oc_fault && !data->have_uc_fault)
break;
mfr_status = pmbus_read_byte_data(client, page,
PMBUS_STATUS_MFR_SPECIFIC);
if (mfr_status < 0)
return mfr_status;
if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
ret |= data->have_oc_fault ?
PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
}
break;
case PMBUS_STATUS_VOUT:
if (data->have_vout)
return -ENODATA;
ret = 0;
if (data->have_vaux_status) {
mfr_status = pmbus_read_byte_data(client, 0,
ADM1075_VAUX_STATUS);
if (mfr_status < 0)
return mfr_status;
if (mfr_status & ADM1075_VAUX_OV_WARN)
ret |= PB_VOLTAGE_OV_WARNING;
if (mfr_status & ADM1075_VAUX_UV_WARN)
ret |= PB_VOLTAGE_UV_WARNING;
} else if (data->have_mfr_vaux_status) {
mfr_status = pmbus_read_byte_data(client, page,
PMBUS_STATUS_MFR_SPECIFIC);
if (mfr_status < 0)
return mfr_status;
if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN)
ret |= PB_VOLTAGE_OV_WARNING;
if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN)
ret |= PB_VOLTAGE_UV_WARNING;
}
break;
default:
ret = -ENODATA;
break;
}
return ret;
}
static const struct i2c_device_id adm1275_id[] = {
{ "adm1075", adm1075 },
{ "adm1275", adm1275 },
{ "adm1276", adm1276 },
{ "adm1293", adm1293 },
{ "adm1294", adm1294 },
{ }
};
MODULE_DEVICE_TABLE(i2c, adm1275_id);
static int adm1275_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
int config, device_config;
int ret;
struct pmbus_driver_info *info;
struct adm1275_data *data;
const struct i2c_device_id *mid;
const struct coefficients *coefficients;
int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_READ_BYTE_DATA
| I2C_FUNC_SMBUS_BLOCK_DATA))
return -ENODEV;
ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer);
if (ret < 0) {
dev_err(&client->dev, "Failed to read Manufacturer ID\n");
return ret;
}
if (ret != 3 || strncmp(block_buffer, "ADI", 3)) {
dev_err(&client->dev, "Unsupported Manufacturer ID\n");
return -ENODEV;
}
ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
if (ret < 0) {
dev_err(&client->dev, "Failed to read Manufacturer Model\n");
return ret;
}
for (mid = adm1275_id; mid->name[0]; mid++) {
if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
break;
}
if (!mid->name[0]) {
dev_err(&client->dev, "Unsupported device\n");
return -ENODEV;
}
if (id->driver_data != mid->driver_data)
dev_notice(&client->dev,
"Device mismatch: Configured %s, detected %s\n",
id->name, mid->name);
config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
if (config < 0)
return config;
device_config = i2c_smbus_read_byte_data(client, ADM1275_DEVICE_CONFIG);
if (device_config < 0)
return device_config;
data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
data->id = mid->driver_data;
info = &data->info;
info->pages = 1;
info->format[PSC_VOLTAGE_IN] = direct;
info->format[PSC_VOLTAGE_OUT] = direct;
info->format[PSC_CURRENT_OUT] = direct;
info->format[PSC_POWER] = direct;
info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;
info->read_word_data = adm1275_read_word_data;
info->read_byte_data = adm1275_read_byte_data;
info->write_word_data = adm1275_write_word_data;
switch (data->id) {
case adm1075:
if (device_config & ADM1275_IOUT_WARN2_SELECT)
data->have_oc_fault = true;
else
data->have_uc_fault = true;
data->have_pin_max = true;
data->have_vaux_status = true;
coefficients = adm1075_coefficients;
vindex = 0;
switch (config & ADM1075_IRANGE_MASK) {
case ADM1075_IRANGE_25:
cindex = 1;
pindex = 3;
break;
case ADM1075_IRANGE_50:
cindex = 2;
pindex = 4;
break;
default:
dev_err(&client->dev, "Invalid input current range");
break;
}
info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
| PMBUS_HAVE_STATUS_INPUT;
if (config & ADM1275_VIN_VOUT_SELECT)
info->func[0] |=
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
break;
case adm1275:
if (device_config & ADM1275_IOUT_WARN2_SELECT)
data->have_oc_fault = true;
else
data->have_uc_fault = true;
data->have_vout = true;
coefficients = adm1275_coefficients;
vindex = (config & ADM1275_VRANGE) ? 0 : 1;
cindex = 2;
if (config & ADM1275_VIN_VOUT_SELECT)
info->func[0] |=
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
else
info->func[0] |=
PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
break;
case adm1276:
if (device_config & ADM1275_IOUT_WARN2_SELECT)
data->have_oc_fault = true;
else
data->have_uc_fault = true;
data->have_vout = true;
data->have_pin_max = true;
coefficients = adm1276_coefficients;
vindex = (config & ADM1275_VRANGE) ? 0 : 1;
cindex = 2;
pindex = (config & ADM1275_VRANGE) ? 3 : 4;
info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
| PMBUS_HAVE_STATUS_INPUT;
if (config & ADM1275_VIN_VOUT_SELECT)
info->func[0] |=
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
break;
case adm1293:
case adm1294:
data->have_iout_min = true;
data->have_pin_min = true;
data->have_pin_max = true;
data->have_mfr_vaux_status = true;
coefficients = adm1293_coefficients;
voindex = 0;
switch (config & ADM1293_VIN_SEL_MASK) {
case ADM1293_VIN_SEL_012: /* 1.2V */
vindex = 0;
break;
case ADM1293_VIN_SEL_074: /* 7.4V */
vindex = 1;
break;
case ADM1293_VIN_SEL_210: /* 21V */
vindex = 2;
break;
default: /* disabled */
break;
}
switch (config & ADM1293_IRANGE_MASK) {
case ADM1293_IRANGE_25:
cindex = 3;
break;
case ADM1293_IRANGE_50:
cindex = 4;
break;
case ADM1293_IRANGE_100:
cindex = 5;
break;
case ADM1293_IRANGE_200:
cindex = 6;
break;
}
if (vindex >= 0)
pindex = 7 + vindex * 4 + (cindex - 3);
if (config & ADM1293_VAUX_EN)
info->func[0] |=
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
info->func[0] |= PMBUS_HAVE_PIN |
PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
break;
default:
dev_err(&client->dev, "Unsupported device\n");
return -ENODEV;
}
if (voindex < 0)
voindex = vindex;
if (vindex >= 0) {
info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m;
info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b;
info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R;
}
if (voindex >= 0) {
info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m;
info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b;
info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R;
}
if (cindex >= 0) {
info->m[PSC_CURRENT_OUT] = coefficients[cindex].m;
info->b[PSC_CURRENT_OUT] = coefficients[cindex].b;
info->R[PSC_CURRENT_OUT] = coefficients[cindex].R;
}
if (pindex >= 0) {
info->m[PSC_POWER] = coefficients[pindex].m;
info->b[PSC_POWER] = coefficients[pindex].b;
info->R[PSC_POWER] = coefficients[pindex].R;
}
return pmbus_do_probe(client, id, info);
}
static struct i2c_driver adm1275_driver = {
.driver = {
.name = "adm1275",
},
.probe = adm1275_probe,
.remove = pmbus_do_remove,
.id_table = adm1275_id,
};
module_i2c_driver(adm1275_driver);
MODULE_AUTHOR("Guenter Roeck");
MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
MODULE_LICENSE("GPL");
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