--- /dev/null
+/*
+ * 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 "pmbus.h"
+
+enum chips { adm1075, adm1275, adm1276 };
+
+#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 (1 << 6)
+#define ADM1275_VRANGE (1 << 5)
+#define ADM1075_IRANGE_50 (1 << 4)
+#define ADM1075_IRANGE_25 (1 << 3)
+#define ADM1075_IRANGE_MASK ((1 << 3) | (1 << 4))
+
+#define ADM1275_IOUT_WARN2_LIMIT 0xd7
+#define ADM1275_DEVICE_CONFIG 0xd8
+
+#define ADM1275_IOUT_WARN2_SELECT (1 << 4)
+
+#define ADM1276_PEAK_PIN 0xda
+
+#define ADM1275_MFR_STATUS_IOUT_WARN2 (1 << 0)
+
+#define ADM1075_READ_VAUX 0xdd
+#define ADM1075_VAUX_OV_WARN_LIMIT 0xde
+#define ADM1075_VAUX_UV_WARN_LIMIT 0xdf
+#define ADM1075_VAUX_STATUS 0xf6
+
+#define ADM1075_VAUX_OV_WARN (1<<7)
+#define ADM1075_VAUX_UV_WARN (1<<6)
+
+struct adm1275_data {
+ int id;
+ bool have_oc_fault;
+ struct pmbus_driver_info info;
+};
+
+#define to_adm1275_data(x) container_of(x, struct adm1275_data, info)
+
+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_oc_fault) {
+ ret = -ENXIO;
+ break;
+ }
+ ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
+ break;
+ case PMBUS_IOUT_OC_FAULT_LIMIT:
+ if (!data->have_oc_fault) {
+ ret = -ENXIO;
+ break;
+ }
+ ret = pmbus_read_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT);
+ break;
+ case PMBUS_VOUT_OV_WARN_LIMIT:
+ if (data->id != adm1075) {
+ ret = -ENODATA;
+ break;
+ }
+ ret = pmbus_read_word_data(client, 0,
+ ADM1075_VAUX_OV_WARN_LIMIT);
+ break;
+ case PMBUS_VOUT_UV_WARN_LIMIT:
+ if (data->id != adm1075) {
+ ret = -ENODATA;
+ break;
+ }
+ ret = pmbus_read_word_data(client, 0,
+ ADM1075_VAUX_UV_WARN_LIMIT);
+ break;
+ case PMBUS_READ_VOUT:
+ if (data->id != adm1075) {
+ ret = -ENODATA;
+ break;
+ }
+ ret = pmbus_read_word_data(client, 0, ADM1075_READ_VAUX);
+ 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_MAX:
+ if (data->id == adm1275) {
+ ret = -ENXIO;
+ break;
+ }
+ 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->id == adm1275)
+ ret = -ENXIO;
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+ return ret;
+}
+
+static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
+ u16 word)
+{
+ 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);
+ 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);
+ 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;
+ mfr_status = pmbus_read_byte_data(client, page,
+ PMBUS_STATUS_MFR_SPECIFIC);
+ if (mfr_status < 0) {
+ ret = mfr_status;
+ break;
+ }
+ 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->id != adm1075) {
+ ret = -ENODATA;
+ break;
+ }
+ ret = 0;
+ mfr_status = pmbus_read_byte_data(client, 0,
+ ADM1075_VAUX_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;
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+ return ret;
+}
+
+static const struct i2c_device_id adm1275_id[] = {
+ { "adm1075", adm1075 },
+ { "adm1275", adm1275 },
+ { "adm1276", adm1276 },
+ { }
+};
+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;
+
+ 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->m[PSC_CURRENT_OUT] = 807;
+ info->b[PSC_CURRENT_OUT] = 20475;
+ info->R[PSC_CURRENT_OUT] = -1;
+ 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;
+
+ if (data->id == adm1075) {
+ info->m[PSC_VOLTAGE_IN] = 27169;
+ info->b[PSC_VOLTAGE_IN] = 0;
+ info->R[PSC_VOLTAGE_IN] = -1;
+ info->m[PSC_VOLTAGE_OUT] = 27169;
+ info->b[PSC_VOLTAGE_OUT] = 0;
+ info->R[PSC_VOLTAGE_OUT] = -1;
+ } else if (config & ADM1275_VRANGE) {
+ info->m[PSC_VOLTAGE_IN] = 19199;
+ info->b[PSC_VOLTAGE_IN] = 0;
+ info->R[PSC_VOLTAGE_IN] = -2;
+ info->m[PSC_VOLTAGE_OUT] = 19199;
+ info->b[PSC_VOLTAGE_OUT] = 0;
+ info->R[PSC_VOLTAGE_OUT] = -2;
+ } else {
+ info->m[PSC_VOLTAGE_IN] = 6720;
+ info->b[PSC_VOLTAGE_IN] = 0;
+ info->R[PSC_VOLTAGE_IN] = -1;
+ info->m[PSC_VOLTAGE_OUT] = 6720;
+ info->b[PSC_VOLTAGE_OUT] = 0;
+ info->R[PSC_VOLTAGE_OUT] = -1;
+ }
+
+ if (device_config & ADM1275_IOUT_WARN2_SELECT)
+ data->have_oc_fault = true;
+
+ switch (data->id) {
+ case adm1075:
+ info->format[PSC_POWER] = direct;
+ info->b[PSC_POWER] = 0;
+ info->R[PSC_POWER] = -1;
+ switch (config & ADM1075_IRANGE_MASK) {
+ case ADM1075_IRANGE_25:
+ info->m[PSC_POWER] = 8549;
+ info->m[PSC_CURRENT_OUT] = 806;
+ break;
+ case ADM1075_IRANGE_50:
+ info->m[PSC_POWER] = 4279;
+ info->m[PSC_CURRENT_OUT] = 404;
+ break;
+ default:
+ dev_err(&client->dev, "Invalid input current range");
+ info->m[PSC_POWER] = 0;
+ info->m[PSC_CURRENT_OUT] = 0;
+ 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 (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:
+ info->format[PSC_POWER] = direct;
+ 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;
+ if (config & ADM1275_VRANGE) {
+ info->m[PSC_POWER] = 6043;
+ info->b[PSC_POWER] = 0;
+ info->R[PSC_POWER] = -2;
+ } else {
+ info->m[PSC_POWER] = 2115;
+ info->b[PSC_POWER] = 0;
+ info->R[PSC_POWER] = -1;
+ }
+ break;
+ }
+
+ 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");
Code Review / kvmfornfv.git / blobdiff