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-rw-r--r--drivers/hwmon/pmbus/pfe1100.c249
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 0000000..3731fa0
--- /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");
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