diff options
Diffstat (limited to 'drivers/hwmon/pmbus/pfe1100.c')
-rw-r--r-- | drivers/hwmon/pmbus/pfe1100.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/pfe1100.c b/drivers/hwmon/pmbus/pfe1100.c new file mode 100644 index 000000000000..3731fa06c593 --- /dev/null +++ b/drivers/hwmon/pmbus/pfe1100.c @@ -0,0 +1,249 @@ +/* + * Hardware monitoring driver for PFE1100 and compatibles + * Based on the zl6100 driver with the following copyright: + * + * Copyright (c) 2011 Ericsson AB. + * Copyright (c) 2012 Guenter Roeck + * Copyright 2004-present Facebook. All Rights Reserved. + * + * + * 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/slab.h> +#include <linux/i2c.h> +#include <linux/ktime.h> +#include <linux/delay.h> +#include "pmbus.h" + +enum chips { SPDFCBK_15G, SPAFCBK_14G }; + +struct pfe1100_data { + int id; + struct pmbus_driver_info info; +}; + +#define to_pfe1100_data(x) container_of(x, struct pfe1100_data, info) + + +#define PFE1100_WAIT_TIME 5000 /* uS */ + +static ushort delay = PFE1100_WAIT_TIME; +module_param(delay, ushort, 0644); +MODULE_PARM_DESC(delay, "Delay between chip accesses in uS"); + +static const struct i2c_device_id pfe1100_id[] = { + {"pfe1100dc", SPDFCBK_15G}, + {"pfe1100ac", SPAFCBK_14G}, + {"pfe1100", 0}, + { } +}; +MODULE_DEVICE_TABLE(i2c, pfe1100_id); + +static int pfe1100_read_word_data(struct i2c_client *client, int page, int reg) +{ + const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + struct pfe1100_data *data = to_pfe1100_data(info); + int ret; + + if (data->id != SPAFCBK_14G && page > 0) + return -ENXIO; + + if (reg >= PMBUS_VIRT_BASE) + return -ENXIO; + + switch (reg) { + case PMBUS_FAN_COMMAND_1: + case PMBUS_STATUS_WORD: + case PMBUS_READ_VIN: + case PMBUS_READ_IIN: + case PMBUS_READ_VOUT: + case PMBUS_READ_IOUT: + case PMBUS_READ_TEMPERATURE_1: + case PMBUS_READ_TEMPERATURE_2: + case PMBUS_READ_TEMPERATURE_3: + case PMBUS_READ_FAN_SPEED_1: + case PMBUS_READ_POUT: + case PMBUS_READ_PIN: + case PMBUS_MFR_LOCATION: + ret = pmbus_read_word_data(client, page, reg); + return ret; + default: + return -ENXIO; + } +} + +static int pfe1100_read_byte_data(struct i2c_client *client, int page, int reg) +{ + const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + struct pfe1100_data *data = to_pfe1100_data(info); + int ret; + + if (data->id != SPAFCBK_14G && page > 0) + return -ENXIO; + + switch (reg) { + case PMBUS_PAGE: + case PMBUS_OPERATION: + case PMBUS_CLEAR_FAULTS: + case PMBUS_CAPABILITY: + case PMBUS_VOUT_MODE: + case PMBUS_FAN_CONFIG_12: + case PMBUS_STATUS_BYTE: + case PMBUS_STATUS_VOUT: + case PMBUS_STATUS_IOUT: + case PMBUS_STATUS_INPUT: + case PMBUS_STATUS_TEMPERATURE: + case PMBUS_STATUS_CML: + case PMBUS_STATUS_OTHER: + case PMBUS_STATUS_MFR_SPECIFIC: + case PMBUS_STATUS_FAN_12: + ret = pmbus_read_byte_data(client, page, reg); + return ret; + default: + return -ENXIO; + } +} + +static int pfe1100_write_word_data(struct i2c_client *client, int page, int reg, + u16 word) +{ + const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + struct pfe1100_data *data = to_pfe1100_data(info); + int ret; + + if (data->id != SPAFCBK_14G && page > 0) + return -ENXIO; + + if (reg >= PMBUS_VIRT_BASE) + return -ENXIO; + + if (reg == PMBUS_FAN_COMMAND_1) + ret = pmbus_write_word_data(client, page, reg, word); + else + ret = -ENXIO; + + return ret; +} + +static int pfe1100_write_byte(struct i2c_client *client, int page, u8 value) +{ + const struct pmbus_driver_info *info = pmbus_get_driver_info(client); + struct pfe1100_data *data = to_pfe1100_data(info); + int ret; + + if (data->id != SPAFCBK_14G && page > 0) + return -ENXIO; + + switch (value) { + case PMBUS_PAGE: + case PMBUS_OPERATION: + case PMBUS_CLEAR_FAULTS: + ret = pmbus_write_byte(client, page, value); + return ret; + default: + return -ENXIO; + } +} + +static int pfe1100_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret; + int kind; + struct pfe1100_data *data; + struct pmbus_driver_info *info; + u8 device_id[I2C_SMBUS_BLOCK_MAX + 1]; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_READ_WORD_DATA + | I2C_FUNC_SMBUS_READ_BLOCK_DATA)) + return -ENODEV; + + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, device_id); + if (ret < 0) { + dev_err(&client->dev, "Failed to read Manufacturer ID\n"); + kind = SPDFCBK_15G; + } else { + device_id[ret] = 0; + if (strncmp(device_id, "SPAFCBK-14G", ret)) + kind = SPDFCBK_15G; + else + kind = SPAFCBK_14G; + dev_notice(&client->dev, "MFR_ID is [%s]\n", device_id); + } + + data = devm_kzalloc(&client->dev, sizeof(struct pfe1100_data), + GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->id = kind; + + info = &data->info; + info->delay = delay; + if (kind == SPAFCBK_14G) + info->pages = 2; + else + info->pages = 1; + + /* + * It seems reasonable to just scan the device for supported + * values, but most drivers just seem to jam these values in + * there, so that's what we'll do. + */ + + info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IIN | + PMBUS_HAVE_IOUT | PMBUS_HAVE_PIN | PMBUS_HAVE_POUT | + PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | + PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT | + PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP | + PMBUS_HAVE_STATUS_FAN12 | PMBUS_HAVE_MFRDATA; + + /* AC units have a third temperature sensor, and data from 3V input: */ + + if (kind == SPAFCBK_14G) { + info->func[0] |= PMBUS_HAVE_TEMP3; + info->func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | + PMBUS_HAVE_POUT | PMBUS_HAVE_STATUS_VOUT | + PMBUS_HAVE_STATUS_IOUT; + } + + info->read_word_data = pfe1100_read_word_data; + info->read_byte_data = pfe1100_read_byte_data; + info->write_word_data = pfe1100_write_word_data; + info->write_byte = pfe1100_write_byte; + + return pmbus_do_probe(client, id, info); +} + +static struct i2c_driver pfe1100_driver = { + .driver = { + .name = "pfe1100", + }, + .probe = pfe1100_probe, + .remove = pmbus_do_remove, + .id_table = pfe1100_id, +}; + +module_i2c_driver(pfe1100_driver); + +MODULE_AUTHOR("Kevin Lahey, based on work by Guenter Roeck"); +MODULE_DESCRIPTION("PMBus driver for PFE1100"); +MODULE_LICENSE("GPL"); |