68a4038236
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>
558 lines
15 KiB
C
558 lines
15 KiB
C
/*
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* Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller
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* and Digital Power Monitor
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*
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* Copyright (c) 2011 Ericsson AB.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/bitops.h>
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#include "pmbus.h"
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enum chips { adm1075, adm1275, adm1276, adm1293, adm1294 };
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#define ADM1275_MFR_STATUS_IOUT_WARN2 BIT(0)
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#define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5)
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#define ADM1293_MFR_STATUS_VAUX_OV_WARN BIT(6)
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#define ADM1275_PEAK_IOUT 0xd0
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#define ADM1275_PEAK_VIN 0xd1
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#define ADM1275_PEAK_VOUT 0xd2
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#define ADM1275_PMON_CONFIG 0xd4
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#define ADM1275_VIN_VOUT_SELECT BIT(6)
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#define ADM1275_VRANGE BIT(5)
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#define ADM1075_IRANGE_50 BIT(4)
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#define ADM1075_IRANGE_25 BIT(3)
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#define ADM1075_IRANGE_MASK (BIT(3) | BIT(4))
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#define ADM1293_IRANGE_25 0
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#define ADM1293_IRANGE_50 BIT(6)
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#define ADM1293_IRANGE_100 BIT(7)
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#define ADM1293_IRANGE_200 (BIT(6) | BIT(7))
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#define ADM1293_IRANGE_MASK (BIT(6) | BIT(7))
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#define ADM1293_VIN_SEL_012 BIT(2)
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#define ADM1293_VIN_SEL_074 BIT(3)
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#define ADM1293_VIN_SEL_210 (BIT(2) | BIT(3))
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#define ADM1293_VIN_SEL_MASK (BIT(2) | BIT(3))
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#define ADM1293_VAUX_EN BIT(1)
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#define ADM1275_IOUT_WARN2_LIMIT 0xd7
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#define ADM1275_DEVICE_CONFIG 0xd8
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#define ADM1275_IOUT_WARN2_SELECT BIT(4)
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#define ADM1276_PEAK_PIN 0xda
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#define ADM1075_READ_VAUX 0xdd
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#define ADM1075_VAUX_OV_WARN_LIMIT 0xde
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#define ADM1075_VAUX_UV_WARN_LIMIT 0xdf
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#define ADM1293_IOUT_MIN 0xe3
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#define ADM1293_PIN_MIN 0xe4
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#define ADM1075_VAUX_STATUS 0xf6
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#define ADM1075_VAUX_OV_WARN BIT(7)
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#define ADM1075_VAUX_UV_WARN BIT(6)
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struct adm1275_data {
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int id;
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bool have_oc_fault;
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bool have_uc_fault;
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bool have_vout;
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bool have_vaux_status;
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bool have_mfr_vaux_status;
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bool have_iout_min;
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bool have_pin_min;
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bool have_pin_max;
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struct pmbus_driver_info info;
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};
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#define to_adm1275_data(x) container_of(x, struct adm1275_data, info)
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struct coefficients {
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s16 m;
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s16 b;
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s16 R;
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};
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static const struct coefficients adm1075_coefficients[] = {
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[0] = { 27169, 0, -1 }, /* voltage */
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[1] = { 806, 20475, -1 }, /* current, irange25 */
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[2] = { 404, 20475, -1 }, /* current, irange50 */
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[3] = { 0, -1, 8549 }, /* power, irange25 */
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[4] = { 0, -1, 4279 }, /* power, irange50 */
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};
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static const struct coefficients adm1275_coefficients[] = {
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[0] = { 19199, 0, -2 }, /* voltage, vrange set */
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[1] = { 6720, 0, -1 }, /* voltage, vrange not set */
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[2] = { 807, 20475, -1 }, /* current */
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};
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static const struct coefficients adm1276_coefficients[] = {
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[0] = { 19199, 0, -2 }, /* voltage, vrange set */
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[1] = { 6720, 0, -1 }, /* voltage, vrange not set */
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[2] = { 807, 20475, -1 }, /* current */
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[3] = { 6043, 0, -2 }, /* power, vrange set */
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[4] = { 2115, 0, -1 }, /* power, vrange not set */
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};
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static const struct coefficients adm1293_coefficients[] = {
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[0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */
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[1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */
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[2] = { 19604, -50, -2 }, /* voltage, vrange 21V */
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[3] = { 8000, -100, -2 }, /* current, irange25 */
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[4] = { 4000, -100, -2 }, /* current, irange50 */
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[5] = { 20000, -1000, -3 }, /* current, irange100 */
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[6] = { 10000, -1000, -3 }, /* current, irange200 */
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[7] = { 10417, 0, -1 }, /* power, 1.2V, irange25 */
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[8] = { 5208, 0, -1 }, /* power, 1.2V, irange50 */
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[9] = { 26042, 0, -2 }, /* power, 1.2V, irange100 */
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[10] = { 13021, 0, -2 }, /* power, 1.2V, irange200 */
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[11] = { 17351, 0, -2 }, /* power, 7.4V, irange25 */
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[12] = { 8676, 0, -2 }, /* power, 7.4V, irange50 */
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[13] = { 4338, 0, -2 }, /* power, 7.4V, irange100 */
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[14] = { 21689, 0, -3 }, /* power, 7.4V, irange200 */
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[15] = { 6126, 0, -2 }, /* power, 21V, irange25 */
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[16] = { 30631, 0, -3 }, /* power, 21V, irange50 */
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[17] = { 15316, 0, -3 }, /* power, 21V, irange100 */
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[18] = { 7658, 0, -3 }, /* power, 21V, irange200 */
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};
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static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
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{
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const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
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const struct adm1275_data *data = to_adm1275_data(info);
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int ret = 0;
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if (page)
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return -ENXIO;
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switch (reg) {
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case PMBUS_IOUT_UC_FAULT_LIMIT:
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if (!data->have_uc_fault)
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return -ENXIO;
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ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
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break;
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case PMBUS_IOUT_OC_FAULT_LIMIT:
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if (!data->have_oc_fault)
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return -ENXIO;
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ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
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break;
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case PMBUS_VOUT_OV_WARN_LIMIT:
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if (data->have_vout)
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return -ENODATA;
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ret = pmbus_read_word_data(client, 0,
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ADM1075_VAUX_OV_WARN_LIMIT);
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break;
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case PMBUS_VOUT_UV_WARN_LIMIT:
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if (data->have_vout)
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return -ENODATA;
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ret = pmbus_read_word_data(client, 0,
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ADM1075_VAUX_UV_WARN_LIMIT);
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break;
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case PMBUS_READ_VOUT:
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if (data->have_vout)
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return -ENODATA;
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ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX);
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break;
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case PMBUS_VIRT_READ_IOUT_MIN:
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if (!data->have_iout_min)
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return -ENXIO;
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ret = pmbus_read_word_data(client, 0, ADM1293_IOUT_MIN);
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break;
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case PMBUS_VIRT_READ_IOUT_MAX:
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ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT);
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break;
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case PMBUS_VIRT_READ_VOUT_MAX:
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ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VOUT);
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break;
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case PMBUS_VIRT_READ_VIN_MAX:
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ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
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break;
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case PMBUS_VIRT_READ_PIN_MIN:
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if (!data->have_pin_min)
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return -ENXIO;
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ret = pmbus_read_word_data(client, 0, ADM1293_PIN_MIN);
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break;
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case PMBUS_VIRT_READ_PIN_MAX:
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if (!data->have_pin_max)
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return -ENXIO;
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ret = pmbus_read_word_data(client, 0, ADM1276_PEAK_PIN);
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break;
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case PMBUS_VIRT_RESET_IOUT_HISTORY:
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case PMBUS_VIRT_RESET_VOUT_HISTORY:
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case PMBUS_VIRT_RESET_VIN_HISTORY:
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break;
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case PMBUS_VIRT_RESET_PIN_HISTORY:
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if (!data->have_pin_max)
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return -ENXIO;
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break;
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default:
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ret = -ENODATA;
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break;
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}
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return ret;
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}
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static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
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u16 word)
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{
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const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
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const struct adm1275_data *data = to_adm1275_data(info);
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int ret;
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if (page)
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return -ENXIO;
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switch (reg) {
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case PMBUS_IOUT_UC_FAULT_LIMIT:
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case PMBUS_IOUT_OC_FAULT_LIMIT:
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ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT,
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word);
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break;
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case PMBUS_VIRT_RESET_IOUT_HISTORY:
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ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
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if (!ret && data->have_iout_min)
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ret = pmbus_write_word_data(client, 0,
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ADM1293_IOUT_MIN, 0);
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break;
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case PMBUS_VIRT_RESET_VOUT_HISTORY:
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ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
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break;
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case PMBUS_VIRT_RESET_VIN_HISTORY:
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ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
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break;
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case PMBUS_VIRT_RESET_PIN_HISTORY:
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ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
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if (!ret && data->have_pin_min)
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ret = pmbus_write_word_data(client, 0,
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ADM1293_PIN_MIN, 0);
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break;
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default:
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ret = -ENODATA;
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break;
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}
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return ret;
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}
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static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
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{
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const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
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const struct adm1275_data *data = to_adm1275_data(info);
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int mfr_status, ret;
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if (page > 0)
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return -ENXIO;
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switch (reg) {
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case PMBUS_STATUS_IOUT:
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ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
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if (ret < 0)
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break;
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if (!data->have_oc_fault && !data->have_uc_fault)
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break;
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mfr_status = pmbus_read_byte_data(client, page,
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PMBUS_STATUS_MFR_SPECIFIC);
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if (mfr_status < 0)
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return mfr_status;
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if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
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ret |= data->have_oc_fault ?
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PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
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}
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break;
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case PMBUS_STATUS_VOUT:
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if (data->have_vout)
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return -ENODATA;
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ret = 0;
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if (data->have_vaux_status) {
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mfr_status = pmbus_read_byte_data(client, 0,
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ADM1075_VAUX_STATUS);
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if (mfr_status < 0)
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return mfr_status;
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if (mfr_status & ADM1075_VAUX_OV_WARN)
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ret |= PB_VOLTAGE_OV_WARNING;
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if (mfr_status & ADM1075_VAUX_UV_WARN)
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ret |= PB_VOLTAGE_UV_WARNING;
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} else if (data->have_mfr_vaux_status) {
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mfr_status = pmbus_read_byte_data(client, page,
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PMBUS_STATUS_MFR_SPECIFIC);
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if (mfr_status < 0)
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return mfr_status;
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if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN)
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ret |= PB_VOLTAGE_OV_WARNING;
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if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN)
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ret |= PB_VOLTAGE_UV_WARNING;
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}
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break;
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default:
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ret = -ENODATA;
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break;
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}
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return ret;
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}
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static const struct i2c_device_id adm1275_id[] = {
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{ "adm1075", adm1075 },
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{ "adm1275", adm1275 },
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{ "adm1276", adm1276 },
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{ "adm1293", adm1293 },
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{ "adm1294", adm1294 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, adm1275_id);
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static int adm1275_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
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int config, device_config;
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int ret;
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struct pmbus_driver_info *info;
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struct adm1275_data *data;
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const struct i2c_device_id *mid;
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const struct coefficients *coefficients;
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int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
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if (!i2c_check_functionality(client->adapter,
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I2C_FUNC_SMBUS_READ_BYTE_DATA
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| I2C_FUNC_SMBUS_BLOCK_DATA))
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return -ENODEV;
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ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer);
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if (ret < 0) {
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dev_err(&client->dev, "Failed to read Manufacturer ID\n");
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return ret;
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}
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if (ret != 3 || strncmp(block_buffer, "ADI", 3)) {
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dev_err(&client->dev, "Unsupported Manufacturer ID\n");
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return -ENODEV;
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}
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ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
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if (ret < 0) {
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dev_err(&client->dev, "Failed to read Manufacturer Model\n");
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return ret;
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}
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for (mid = adm1275_id; mid->name[0]; mid++) {
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if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
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break;
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}
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if (!mid->name[0]) {
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dev_err(&client->dev, "Unsupported device\n");
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return -ENODEV;
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}
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if (id->driver_data != mid->driver_data)
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dev_notice(&client->dev,
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"Device mismatch: Configured %s, detected %s\n",
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id->name, mid->name);
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config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
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if (config < 0)
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return config;
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device_config = i2c_smbus_read_byte_data(client, ADM1275_DEVICE_CONFIG);
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if (device_config < 0)
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return device_config;
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data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data),
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GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->id = mid->driver_data;
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info = &data->info;
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info->pages = 1;
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info->format[PSC_VOLTAGE_IN] = direct;
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info->format[PSC_VOLTAGE_OUT] = direct;
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info->format[PSC_CURRENT_OUT] = direct;
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info->format[PSC_POWER] = direct;
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info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;
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info->read_word_data = adm1275_read_word_data;
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info->read_byte_data = adm1275_read_byte_data;
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info->write_word_data = adm1275_write_word_data;
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switch (data->id) {
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case adm1075:
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if (device_config & ADM1275_IOUT_WARN2_SELECT)
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data->have_oc_fault = true;
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else
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data->have_uc_fault = true;
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data->have_pin_max = true;
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data->have_vaux_status = true;
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coefficients = adm1075_coefficients;
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vindex = 0;
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switch (config & ADM1075_IRANGE_MASK) {
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case ADM1075_IRANGE_25:
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cindex = 1;
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pindex = 3;
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break;
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case ADM1075_IRANGE_50:
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cindex = 2;
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pindex = 4;
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break;
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default:
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dev_err(&client->dev, "Invalid input current range");
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break;
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}
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info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
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| PMBUS_HAVE_STATUS_INPUT;
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if (config & ADM1275_VIN_VOUT_SELECT)
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info->func[0] |=
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PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
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break;
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case adm1275:
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if (device_config & ADM1275_IOUT_WARN2_SELECT)
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data->have_oc_fault = true;
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else
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data->have_uc_fault = true;
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data->have_vout = true;
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coefficients = adm1275_coefficients;
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vindex = (config & ADM1275_VRANGE) ? 0 : 1;
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cindex = 2;
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if (config & ADM1275_VIN_VOUT_SELECT)
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info->func[0] |=
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PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
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else
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info->func[0] |=
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|
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");
|