| /* |
| * Hardware monitoring driver for Maxim MAX34440/MAX34441 |
| * |
| * Copyright (c) 2011 Ericsson AB. |
| * Copyright (c) 2012 Guenter Roeck |
| * |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/err.h> |
| #include <linux/i2c.h> |
| #include "pmbus.h" |
| |
| enum chips { max34440, max34441, max34446, max34460, max34461 }; |
| |
| #define MAX34440_MFR_VOUT_PEAK 0xd4 |
| #define MAX34440_MFR_IOUT_PEAK 0xd5 |
| #define MAX34440_MFR_TEMPERATURE_PEAK 0xd6 |
| #define MAX34440_MFR_VOUT_MIN 0xd7 |
| |
| #define MAX34446_MFR_POUT_PEAK 0xe0 |
| #define MAX34446_MFR_POUT_AVG 0xe1 |
| #define MAX34446_MFR_IOUT_AVG 0xe2 |
| #define MAX34446_MFR_TEMPERATURE_AVG 0xe3 |
| |
| #define MAX34440_STATUS_OC_WARN (1 << 0) |
| #define MAX34440_STATUS_OC_FAULT (1 << 1) |
| #define MAX34440_STATUS_OT_FAULT (1 << 5) |
| #define MAX34440_STATUS_OT_WARN (1 << 6) |
| |
| struct max34440_data { |
| int id; |
| struct pmbus_driver_info info; |
| }; |
| |
| #define to_max34440_data(x) container_of(x, struct max34440_data, info) |
| |
| static int max34440_read_word_data(struct i2c_client *client, int page, int reg) |
| { |
| int ret; |
| const struct pmbus_driver_info *info = pmbus_get_driver_info(client); |
| const struct max34440_data *data = to_max34440_data(info); |
| |
| switch (reg) { |
| case PMBUS_VIRT_READ_VOUT_MIN: |
| ret = pmbus_read_word_data(client, page, |
| MAX34440_MFR_VOUT_MIN); |
| break; |
| case PMBUS_VIRT_READ_VOUT_MAX: |
| ret = pmbus_read_word_data(client, page, |
| MAX34440_MFR_VOUT_PEAK); |
| break; |
| case PMBUS_VIRT_READ_IOUT_AVG: |
| if (data->id != max34446) |
| return -ENXIO; |
| ret = pmbus_read_word_data(client, page, |
| MAX34446_MFR_IOUT_AVG); |
| break; |
| case PMBUS_VIRT_READ_IOUT_MAX: |
| ret = pmbus_read_word_data(client, page, |
| MAX34440_MFR_IOUT_PEAK); |
| break; |
| case PMBUS_VIRT_READ_POUT_AVG: |
| if (data->id != max34446) |
| return -ENXIO; |
| ret = pmbus_read_word_data(client, page, |
| MAX34446_MFR_POUT_AVG); |
| break; |
| case PMBUS_VIRT_READ_POUT_MAX: |
| if (data->id != max34446) |
| return -ENXIO; |
| ret = pmbus_read_word_data(client, page, |
| MAX34446_MFR_POUT_PEAK); |
| break; |
| case PMBUS_VIRT_READ_TEMP_AVG: |
| if (data->id != max34446 && data->id != max34460 && |
| data->id != max34461) |
| return -ENXIO; |
| ret = pmbus_read_word_data(client, page, |
| MAX34446_MFR_TEMPERATURE_AVG); |
| break; |
| case PMBUS_VIRT_READ_TEMP_MAX: |
| ret = pmbus_read_word_data(client, page, |
| MAX34440_MFR_TEMPERATURE_PEAK); |
| break; |
| case PMBUS_VIRT_RESET_POUT_HISTORY: |
| if (data->id != max34446) |
| return -ENXIO; |
| ret = 0; |
| break; |
| case PMBUS_VIRT_RESET_VOUT_HISTORY: |
| case PMBUS_VIRT_RESET_IOUT_HISTORY: |
| case PMBUS_VIRT_RESET_TEMP_HISTORY: |
| ret = 0; |
| break; |
| default: |
| ret = -ENODATA; |
| break; |
| } |
| return ret; |
| } |
| |
| static int max34440_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 max34440_data *data = to_max34440_data(info); |
| int ret; |
| |
| switch (reg) { |
| case PMBUS_VIRT_RESET_POUT_HISTORY: |
| ret = pmbus_write_word_data(client, page, |
| MAX34446_MFR_POUT_PEAK, 0); |
| if (ret) |
| break; |
| ret = pmbus_write_word_data(client, page, |
| MAX34446_MFR_POUT_AVG, 0); |
| break; |
| case PMBUS_VIRT_RESET_VOUT_HISTORY: |
| ret = pmbus_write_word_data(client, page, |
| MAX34440_MFR_VOUT_MIN, 0x7fff); |
| if (ret) |
| break; |
| ret = pmbus_write_word_data(client, page, |
| MAX34440_MFR_VOUT_PEAK, 0); |
| break; |
| case PMBUS_VIRT_RESET_IOUT_HISTORY: |
| ret = pmbus_write_word_data(client, page, |
| MAX34440_MFR_IOUT_PEAK, 0); |
| if (!ret && data->id == max34446) |
| ret = pmbus_write_word_data(client, page, |
| MAX34446_MFR_IOUT_AVG, 0); |
| |
| break; |
| case PMBUS_VIRT_RESET_TEMP_HISTORY: |
| ret = pmbus_write_word_data(client, page, |
| MAX34440_MFR_TEMPERATURE_PEAK, |
| 0x8000); |
| if (!ret && data->id == max34446) |
| ret = pmbus_write_word_data(client, page, |
| MAX34446_MFR_TEMPERATURE_AVG, 0); |
| break; |
| default: |
| ret = -ENODATA; |
| break; |
| } |
| return ret; |
| } |
| |
| static int max34440_read_byte_data(struct i2c_client *client, int page, int reg) |
| { |
| int ret = 0; |
| int mfg_status; |
| |
| if (page >= 0) { |
| ret = pmbus_set_page(client, page); |
| if (ret < 0) |
| return ret; |
| } |
| |
| switch (reg) { |
| case PMBUS_STATUS_IOUT: |
| mfg_status = pmbus_read_word_data(client, 0, |
| PMBUS_STATUS_MFR_SPECIFIC); |
| if (mfg_status < 0) |
| return mfg_status; |
| if (mfg_status & MAX34440_STATUS_OC_WARN) |
| ret |= PB_IOUT_OC_WARNING; |
| if (mfg_status & MAX34440_STATUS_OC_FAULT) |
| ret |= PB_IOUT_OC_FAULT; |
| break; |
| case PMBUS_STATUS_TEMPERATURE: |
| mfg_status = pmbus_read_word_data(client, 0, |
| PMBUS_STATUS_MFR_SPECIFIC); |
| if (mfg_status < 0) |
| return mfg_status; |
| if (mfg_status & MAX34440_STATUS_OT_WARN) |
| ret |= PB_TEMP_OT_WARNING; |
| if (mfg_status & MAX34440_STATUS_OT_FAULT) |
| ret |= PB_TEMP_OT_FAULT; |
| break; |
| default: |
| ret = -ENODATA; |
| break; |
| } |
| return ret; |
| } |
| |
| static struct pmbus_driver_info max34440_info[] = { |
| [max34440] = { |
| .pages = 14, |
| .format[PSC_VOLTAGE_IN] = direct, |
| .format[PSC_VOLTAGE_OUT] = direct, |
| .format[PSC_TEMPERATURE] = direct, |
| .format[PSC_CURRENT_OUT] = direct, |
| .m[PSC_VOLTAGE_IN] = 1, |
| .b[PSC_VOLTAGE_IN] = 0, |
| .R[PSC_VOLTAGE_IN] = 3, /* R = 0 in datasheet reflects mV */ |
| .m[PSC_VOLTAGE_OUT] = 1, |
| .b[PSC_VOLTAGE_OUT] = 0, |
| .R[PSC_VOLTAGE_OUT] = 3, /* R = 0 in datasheet reflects mV */ |
| .m[PSC_CURRENT_OUT] = 1, |
| .b[PSC_CURRENT_OUT] = 0, |
| .R[PSC_CURRENT_OUT] = 3, /* R = 0 in datasheet reflects mA */ |
| .m[PSC_TEMPERATURE] = 1, |
| .b[PSC_TEMPERATURE] = 0, |
| .R[PSC_TEMPERATURE] = 2, |
| .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[12] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[13] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .read_byte_data = max34440_read_byte_data, |
| .read_word_data = max34440_read_word_data, |
| .write_word_data = max34440_write_word_data, |
| }, |
| [max34441] = { |
| .pages = 12, |
| .format[PSC_VOLTAGE_IN] = direct, |
| .format[PSC_VOLTAGE_OUT] = direct, |
| .format[PSC_TEMPERATURE] = direct, |
| .format[PSC_CURRENT_OUT] = direct, |
| .format[PSC_FAN] = direct, |
| .m[PSC_VOLTAGE_IN] = 1, |
| .b[PSC_VOLTAGE_IN] = 0, |
| .R[PSC_VOLTAGE_IN] = 3, |
| .m[PSC_VOLTAGE_OUT] = 1, |
| .b[PSC_VOLTAGE_OUT] = 0, |
| .R[PSC_VOLTAGE_OUT] = 3, |
| .m[PSC_CURRENT_OUT] = 1, |
| .b[PSC_CURRENT_OUT] = 0, |
| .R[PSC_CURRENT_OUT] = 3, |
| .m[PSC_TEMPERATURE] = 1, |
| .b[PSC_TEMPERATURE] = 0, |
| .R[PSC_TEMPERATURE] = 2, |
| .m[PSC_FAN] = 1, |
| .b[PSC_FAN] = 0, |
| .R[PSC_FAN] = 0, |
| .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[5] = PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12, |
| .func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[7] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[8] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[9] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[10] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[11] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .read_byte_data = max34440_read_byte_data, |
| .read_word_data = max34440_read_word_data, |
| .write_word_data = max34440_write_word_data, |
| }, |
| [max34446] = { |
| .pages = 7, |
| .format[PSC_VOLTAGE_IN] = direct, |
| .format[PSC_VOLTAGE_OUT] = direct, |
| .format[PSC_TEMPERATURE] = direct, |
| .format[PSC_CURRENT_OUT] = direct, |
| .format[PSC_POWER] = direct, |
| .m[PSC_VOLTAGE_IN] = 1, |
| .b[PSC_VOLTAGE_IN] = 0, |
| .R[PSC_VOLTAGE_IN] = 3, |
| .m[PSC_VOLTAGE_OUT] = 1, |
| .b[PSC_VOLTAGE_OUT] = 0, |
| .R[PSC_VOLTAGE_OUT] = 3, |
| .m[PSC_CURRENT_OUT] = 1, |
| .b[PSC_CURRENT_OUT] = 0, |
| .R[PSC_CURRENT_OUT] = 3, |
| .m[PSC_POWER] = 1, |
| .b[PSC_POWER] = 0, |
| .R[PSC_POWER] = 3, |
| .m[PSC_TEMPERATURE] = 1, |
| .b[PSC_TEMPERATURE] = 0, |
| .R[PSC_TEMPERATURE] = 2, |
| .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT, |
| .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_POUT, |
| .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
| | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT, |
| .func[4] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[5] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[6] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .read_byte_data = max34440_read_byte_data, |
| .read_word_data = max34440_read_word_data, |
| .write_word_data = max34440_write_word_data, |
| }, |
| [max34460] = { |
| .pages = 18, |
| .format[PSC_VOLTAGE_OUT] = direct, |
| .format[PSC_TEMPERATURE] = direct, |
| .m[PSC_VOLTAGE_OUT] = 1, |
| .b[PSC_VOLTAGE_OUT] = 0, |
| .R[PSC_VOLTAGE_OUT] = 3, |
| .m[PSC_TEMPERATURE] = 1, |
| .b[PSC_TEMPERATURE] = 0, |
| .R[PSC_TEMPERATURE] = 2, |
| .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[6] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[7] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[8] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[9] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[10] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[11] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[13] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[14] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[15] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[16] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .read_byte_data = max34440_read_byte_data, |
| .read_word_data = max34440_read_word_data, |
| .write_word_data = max34440_write_word_data, |
| }, |
| [max34461] = { |
| .pages = 23, |
| .format[PSC_VOLTAGE_OUT] = direct, |
| .format[PSC_TEMPERATURE] = direct, |
| .m[PSC_VOLTAGE_OUT] = 1, |
| .b[PSC_VOLTAGE_OUT] = 0, |
| .R[PSC_VOLTAGE_OUT] = 3, |
| .m[PSC_TEMPERATURE] = 1, |
| .b[PSC_TEMPERATURE] = 0, |
| .R[PSC_TEMPERATURE] = 2, |
| .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[4] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[5] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[6] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[7] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[8] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[9] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[10] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[11] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[12] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[13] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[14] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| .func[15] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT, |
| /* page 16 is reserved */ |
| .func[17] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[18] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[19] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[20] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .func[21] = PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP, |
| .read_byte_data = max34440_read_byte_data, |
| .read_word_data = max34440_read_word_data, |
| .write_word_data = max34440_write_word_data, |
| }, |
| }; |
| |
| static int max34440_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct max34440_data *data; |
| |
| data = devm_kzalloc(&client->dev, sizeof(struct max34440_data), |
| GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| data->id = id->driver_data; |
| data->info = max34440_info[id->driver_data]; |
| |
| return pmbus_do_probe(client, id, &data->info); |
| } |
| |
| static const struct i2c_device_id max34440_id[] = { |
| {"max34440", max34440}, |
| {"max34441", max34441}, |
| {"max34446", max34446}, |
| {"max34460", max34460}, |
| {"max34461", max34461}, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(i2c, max34440_id); |
| |
| /* This is the driver that will be inserted */ |
| static struct i2c_driver max34440_driver = { |
| .driver = { |
| .name = "max34440", |
| }, |
| .probe = max34440_probe, |
| .remove = pmbus_do_remove, |
| .id_table = max34440_id, |
| }; |
| |
| module_i2c_driver(max34440_driver); |
| |
| MODULE_AUTHOR("Guenter Roeck"); |
| MODULE_DESCRIPTION("PMBus driver for Maxim MAX34440/MAX34441"); |
| MODULE_LICENSE("GPL"); |