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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 441 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190520071858.739733335@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
431 lines
12 KiB
C
431 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* thmc50.c - Part of lm_sensors, Linux kernel modules for hardware
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* monitoring
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* Copyright (C) 2007 Krzysztof Helt <krzysztof.h1@wp.pl>
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* Based on 2.4 driver by Frodo Looijaard <frodol@dds.nl> and
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* Philip Edelbrock <phil@netroedge.com>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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#include <linux/jiffies.h>
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MODULE_LICENSE("GPL");
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/* Addresses to scan */
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static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
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/* Insmod parameters */
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enum chips { thmc50, adm1022 };
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static unsigned short adm1022_temp3[16];
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static unsigned int adm1022_temp3_num;
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module_param_array(adm1022_temp3, ushort, &adm1022_temp3_num, 0);
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MODULE_PARM_DESC(adm1022_temp3,
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"List of adapter,address pairs to enable 3rd temperature (ADM1022 only)");
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/* Many THMC50 constants specified below */
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/* The THMC50 registers */
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#define THMC50_REG_CONF 0x40
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#define THMC50_REG_COMPANY_ID 0x3E
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#define THMC50_REG_DIE_CODE 0x3F
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#define THMC50_REG_ANALOG_OUT 0x19
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/*
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* The mirror status register cannot be used as
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* reading it does not clear alarms.
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*/
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#define THMC50_REG_INTR 0x41
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static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
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static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
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static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
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static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 };
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static const u8 THMC50_REG_TEMP_DEFAULT[] = { 0x17, 0x18, 0x18 };
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#define THMC50_REG_CONF_nFANOFF 0x20
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#define THMC50_REG_CONF_PROGRAMMED 0x08
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/* Each client has this additional data */
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struct thmc50_data {
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struct i2c_client *client;
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const struct attribute_group *groups[3];
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struct mutex update_lock;
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enum chips type;
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unsigned long last_updated; /* In jiffies */
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char has_temp3; /* !=0 if it is ADM1022 in temp3 mode */
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char valid; /* !=0 if following fields are valid */
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/* Register values */
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s8 temp_input[3];
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s8 temp_max[3];
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s8 temp_min[3];
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s8 temp_critical[3];
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u8 analog_out;
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u8 alarms;
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};
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static struct thmc50_data *thmc50_update_device(struct device *dev)
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{
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struct thmc50_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);
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mutex_lock(&data->update_lock);
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if (time_after(jiffies, data->last_updated + timeout)
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|| !data->valid) {
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int temps = data->has_temp3 ? 3 : 2;
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int i;
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int prog = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
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prog &= THMC50_REG_CONF_PROGRAMMED;
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for (i = 0; i < temps; i++) {
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data->temp_input[i] = i2c_smbus_read_byte_data(client,
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THMC50_REG_TEMP[i]);
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data->temp_max[i] = i2c_smbus_read_byte_data(client,
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THMC50_REG_TEMP_MAX[i]);
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data->temp_min[i] = i2c_smbus_read_byte_data(client,
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THMC50_REG_TEMP_MIN[i]);
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data->temp_critical[i] =
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i2c_smbus_read_byte_data(client,
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prog ? THMC50_REG_TEMP_CRITICAL[i]
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: THMC50_REG_TEMP_DEFAULT[i]);
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}
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data->analog_out =
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i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
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data->alarms =
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i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
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data->last_updated = jiffies;
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data->valid = 1;
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}
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mutex_unlock(&data->update_lock);
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return data;
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}
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static ssize_t analog_out_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct thmc50_data *data = thmc50_update_device(dev);
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return sprintf(buf, "%d\n", data->analog_out);
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}
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static ssize_t analog_out_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct thmc50_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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int config;
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unsigned long tmp;
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int err;
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err = kstrtoul(buf, 10, &tmp);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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data->analog_out = clamp_val(tmp, 0, 255);
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i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
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data->analog_out);
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config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
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if (data->analog_out == 0)
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config &= ~THMC50_REG_CONF_nFANOFF;
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else
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config |= THMC50_REG_CONF_nFANOFF;
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i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
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mutex_unlock(&data->update_lock);
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return count;
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}
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/* There is only one PWM mode = DC */
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static ssize_t pwm_mode_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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return sprintf(buf, "0\n");
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}
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/* Temperatures */
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static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int nr = to_sensor_dev_attr(attr)->index;
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struct thmc50_data *data = thmc50_update_device(dev);
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return sprintf(buf, "%d\n", data->temp_input[nr] * 1000);
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}
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static ssize_t temp_min_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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int nr = to_sensor_dev_attr(attr)->index;
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struct thmc50_data *data = thmc50_update_device(dev);
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return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
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}
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static ssize_t temp_min_store(struct device *dev,
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struct device_attribute *attr, const char *buf,
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size_t count)
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{
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int nr = to_sensor_dev_attr(attr)->index;
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struct thmc50_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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long val;
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int err;
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err = kstrtol(buf, 10, &val);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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data->temp_min[nr] = clamp_val(val / 1000, -128, 127);
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i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
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data->temp_min[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t temp_max_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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int nr = to_sensor_dev_attr(attr)->index;
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struct thmc50_data *data = thmc50_update_device(dev);
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return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
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}
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static ssize_t temp_max_store(struct device *dev,
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struct device_attribute *attr, const char *buf,
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size_t count)
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{
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int nr = to_sensor_dev_attr(attr)->index;
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struct thmc50_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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long val;
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int err;
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err = kstrtol(buf, 10, &val);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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data->temp_max[nr] = clamp_val(val / 1000, -128, 127);
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i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
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data->temp_max[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t temp_critical_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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int nr = to_sensor_dev_attr(attr)->index;
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struct thmc50_data *data = thmc50_update_device(dev);
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return sprintf(buf, "%d\n", data->temp_critical[nr] * 1000);
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}
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static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int index = to_sensor_dev_attr(attr)->index;
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struct thmc50_data *data = thmc50_update_device(dev);
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return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
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}
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static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
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static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0);
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static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
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static SENSOR_DEVICE_ATTR_RO(temp1_crit, temp_critical, 0);
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static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
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static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1);
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static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
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static SENSOR_DEVICE_ATTR_RO(temp2_crit, temp_critical, 1);
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static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
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static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2);
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static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);
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static SENSOR_DEVICE_ATTR_RO(temp3_crit, temp_critical, 2);
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static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 0);
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static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 5);
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static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 1);
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static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 7);
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static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 2);
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static SENSOR_DEVICE_ATTR_RW(pwm1, analog_out, 0);
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static SENSOR_DEVICE_ATTR_RO(pwm1_mode, pwm_mode, 0);
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static struct attribute *thmc50_attributes[] = {
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&sensor_dev_attr_temp1_max.dev_attr.attr,
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&sensor_dev_attr_temp1_min.dev_attr.attr,
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&sensor_dev_attr_temp1_input.dev_attr.attr,
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&sensor_dev_attr_temp1_crit.dev_attr.attr,
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&sensor_dev_attr_temp1_alarm.dev_attr.attr,
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&sensor_dev_attr_temp2_max.dev_attr.attr,
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&sensor_dev_attr_temp2_min.dev_attr.attr,
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&sensor_dev_attr_temp2_input.dev_attr.attr,
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&sensor_dev_attr_temp2_crit.dev_attr.attr,
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&sensor_dev_attr_temp2_alarm.dev_attr.attr,
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&sensor_dev_attr_temp2_fault.dev_attr.attr,
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&sensor_dev_attr_pwm1.dev_attr.attr,
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&sensor_dev_attr_pwm1_mode.dev_attr.attr,
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NULL
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};
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static const struct attribute_group thmc50_group = {
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.attrs = thmc50_attributes,
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};
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/* for ADM1022 3rd temperature mode */
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static struct attribute *temp3_attributes[] = {
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&sensor_dev_attr_temp3_max.dev_attr.attr,
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&sensor_dev_attr_temp3_min.dev_attr.attr,
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&sensor_dev_attr_temp3_input.dev_attr.attr,
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&sensor_dev_attr_temp3_crit.dev_attr.attr,
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&sensor_dev_attr_temp3_alarm.dev_attr.attr,
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&sensor_dev_attr_temp3_fault.dev_attr.attr,
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NULL
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};
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static const struct attribute_group temp3_group = {
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.attrs = temp3_attributes,
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};
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/* Return 0 if detection is successful, -ENODEV otherwise */
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static int thmc50_detect(struct i2c_client *client,
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struct i2c_board_info *info)
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{
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unsigned company;
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unsigned revision;
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unsigned config;
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struct i2c_adapter *adapter = client->adapter;
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const char *type_name;
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
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pr_debug("thmc50: detect failed, smbus byte data not supported!\n");
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return -ENODEV;
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}
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pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
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client->addr, i2c_adapter_id(client->adapter));
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company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
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revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
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config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
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if (revision < 0xc0 || (config & 0x10))
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return -ENODEV;
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if (company == 0x41) {
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int id = i2c_adapter_id(client->adapter);
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int i;
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type_name = "adm1022";
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for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
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if (adm1022_temp3[i] == id &&
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adm1022_temp3[i + 1] == client->addr) {
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/* enable 2nd remote temp */
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config |= (1 << 7);
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i2c_smbus_write_byte_data(client,
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THMC50_REG_CONF,
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config);
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break;
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}
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} else if (company == 0x49) {
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type_name = "thmc50";
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} else {
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pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
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return -ENODEV;
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}
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pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
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type_name, (revision >> 4) - 0xc, revision & 0xf);
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strlcpy(info->type, type_name, I2C_NAME_SIZE);
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return 0;
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}
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static void thmc50_init_client(struct thmc50_data *data)
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{
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struct i2c_client *client = data->client;
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int config;
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data->analog_out = i2c_smbus_read_byte_data(client,
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THMC50_REG_ANALOG_OUT);
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/* set up to at least 1 */
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if (data->analog_out == 0) {
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data->analog_out = 1;
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i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
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data->analog_out);
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}
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config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
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config |= 0x1; /* start the chip if it is in standby mode */
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if (data->type == adm1022 && (config & (1 << 7)))
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data->has_temp3 = 1;
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i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
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}
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static int thmc50_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct device *dev = &client->dev;
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struct thmc50_data *data;
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struct device *hwmon_dev;
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int idx = 0;
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data = devm_kzalloc(dev, sizeof(struct thmc50_data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->client = client;
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data->type = id->driver_data;
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mutex_init(&data->update_lock);
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thmc50_init_client(data);
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/* sysfs hooks */
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data->groups[idx++] = &thmc50_group;
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/* Register additional ADM1022 sysfs hooks */
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if (data->has_temp3)
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data->groups[idx++] = &temp3_group;
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hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
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data, data->groups);
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return PTR_ERR_OR_ZERO(hwmon_dev);
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}
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static const struct i2c_device_id thmc50_id[] = {
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{ "adm1022", adm1022 },
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{ "thmc50", thmc50 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, thmc50_id);
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static struct i2c_driver thmc50_driver = {
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.class = I2C_CLASS_HWMON,
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.driver = {
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.name = "thmc50",
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},
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.probe = thmc50_probe,
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.id_table = thmc50_id,
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.detect = thmc50_detect,
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.address_list = normal_i2c,
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};
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module_i2c_driver(thmc50_driver);
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MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
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MODULE_DESCRIPTION("THMC50 driver");
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