--- /dev/null
+/***************************************************************************
+ * Copyright (C) 2011 Hans de Goede <hdegoede@redhat.com> *
+ * *
+ * 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., *
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ ***************************************************************************/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/platform_device.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include "sch56xx-common.h"
+
+#define DRVNAME "sch5636"
+#define DEVNAME "theseus" /* We only support one model for now */
+
+#define SCH5636_REG_FUJITSU_ID 0x780
+#define SCH5636_REG_FUJITSU_REV 0x783
+
+#define SCH5636_NO_INS 5
+#define SCH5636_NO_TEMPS 16
+#define SCH5636_NO_FANS 8
+
+static const u16 SCH5636_REG_IN_VAL[SCH5636_NO_INS] = {
+ 0x22, 0x23, 0x24, 0x25, 0x189 };
+static const u16 SCH5636_REG_IN_FACTORS[SCH5636_NO_INS] = {
+ 4400, 1500, 4000, 4400, 16000 };
+static const char * const SCH5636_IN_LABELS[SCH5636_NO_INS] = {
+ "3.3V", "VREF", "VBAT", "3.3AUX", "12V" };
+
+static const u16 SCH5636_REG_TEMP_VAL[SCH5636_NO_TEMPS] = {
+ 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181,
+ 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C };
+#define SCH5636_REG_TEMP_CTRL(i) (0x790 + (i))
+#define SCH5636_TEMP_WORKING 0x01
+#define SCH5636_TEMP_ALARM 0x02
+#define SCH5636_TEMP_DEACTIVATED 0x80
+
+static const u16 SCH5636_REG_FAN_VAL[SCH5636_NO_FANS] = {
+ 0x2C, 0x2E, 0x30, 0x32, 0x62, 0x64, 0x66, 0x68 };
+#define SCH5636_REG_FAN_CTRL(i) (0x880 + (i))
+/* FAULT in datasheet, but acts as an alarm */
+#define SCH5636_FAN_ALARM 0x04
+#define SCH5636_FAN_NOT_PRESENT 0x08
+#define SCH5636_FAN_DEACTIVATED 0x80
+
+
+struct sch5636_data {
+ unsigned short addr;
+ struct device *hwmon_dev;
+
+ struct mutex update_lock;
+ char valid; /* !=0 if following fields are valid */
+ unsigned long last_updated; /* In jiffies */
+ u8 in[SCH5636_NO_INS];
+ u8 temp_val[SCH5636_NO_TEMPS];
+ u8 temp_ctrl[SCH5636_NO_TEMPS];
+ u16 fan_val[SCH5636_NO_FANS];
+ u8 fan_ctrl[SCH5636_NO_FANS];
+};
+
+static struct sch5636_data *sch5636_update_device(struct device *dev)
+{
+ struct sch5636_data *data = dev_get_drvdata(dev);
+ struct sch5636_data *ret = data;
+ int i, val;
+
+ mutex_lock(&data->update_lock);
+
+ /* Cache the values for 1 second */
+ if (data->valid && !time_after(jiffies, data->last_updated + HZ))
+ goto abort;
+
+ for (i = 0; i < SCH5636_NO_INS; i++) {
+ val = sch56xx_read_virtual_reg(data->addr,
+ SCH5636_REG_IN_VAL[i]);
+ if (unlikely(val < 0)) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->in[i] = val;
+ }
+
+ for (i = 0; i < SCH5636_NO_TEMPS; i++) {
+ if (data->temp_ctrl[i] & SCH5636_TEMP_DEACTIVATED)
+ continue;
+
+ val = sch56xx_read_virtual_reg(data->addr,
+ SCH5636_REG_TEMP_VAL[i]);
+ if (unlikely(val < 0)) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->temp_val[i] = val;
+
+ val = sch56xx_read_virtual_reg(data->addr,
+ SCH5636_REG_TEMP_CTRL(i));
+ if (unlikely(val < 0)) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->temp_ctrl[i] = val;
+ /* Alarms need to be explicitly write-cleared */
+ if (val & SCH5636_TEMP_ALARM) {
+ sch56xx_write_virtual_reg(data->addr,
+ SCH5636_REG_TEMP_CTRL(i), val);
+ }
+ }
+
+ for (i = 0; i < SCH5636_NO_FANS; i++) {
+ if (data->fan_ctrl[i] & SCH5636_FAN_DEACTIVATED)
+ continue;
+
+ val = sch56xx_read_virtual_reg16(data->addr,
+ SCH5636_REG_FAN_VAL[i]);
+ if (unlikely(val < 0)) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->fan_val[i] = val;
+
+ val = sch56xx_read_virtual_reg(data->addr,
+ SCH5636_REG_FAN_CTRL(i));
+ if (unlikely(val < 0)) {
+ ret = ERR_PTR(val);
+ goto abort;
+ }
+ data->fan_ctrl[i] = val;
+ /* Alarms need to be explicitly write-cleared */
+ if (val & SCH5636_FAN_ALARM) {
+ sch56xx_write_virtual_reg(data->addr,
+ SCH5636_REG_FAN_CTRL(i), val);
+ }
+ }
+
+ data->last_updated = jiffies;
+ data->valid = 1;
+abort:
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
+static int reg_to_rpm(u16 reg)
+{
+ if (reg == 0)
+ return -EIO;
+ if (reg == 0xffff)
+ return 0;
+
+ return 5400540 / reg;
+}
+
+static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
+}
+
+static ssize_t show_in_value(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct sch5636_data *data = sch5636_update_device(dev);
+ int val;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ val = DIV_ROUND_CLOSEST(
+ data->in[attr->index] * SCH5636_REG_IN_FACTORS[attr->index],
+ 255);
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_in_label(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+
+ return snprintf(buf, PAGE_SIZE, "%s\n",
+ SCH5636_IN_LABELS[attr->index]);
+}
+
+static ssize_t show_temp_value(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct sch5636_data *data = sch5636_update_device(dev);
+ int val;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ val = (data->temp_val[attr->index] - 64) * 1000;
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_temp_fault(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct sch5636_data *data = sch5636_update_device(dev);
+ int val;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_WORKING) ? 0 : 1;
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_temp_alarm(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct sch5636_data *data = sch5636_update_device(dev);
+ int val;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_ALARM) ? 1 : 0;
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_fan_value(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct sch5636_data *data = sch5636_update_device(dev);
+ int val;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ val = reg_to_rpm(data->fan_val[attr->index]);
+ if (val < 0)
+ return val;
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_fan_fault(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct sch5636_data *data = sch5636_update_device(dev);
+ int val;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ val = (data->fan_ctrl[attr->index] & SCH5636_FAN_NOT_PRESENT) ? 1 : 0;
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static ssize_t show_fan_alarm(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
+ struct sch5636_data *data = sch5636_update_device(dev);
+ int val;
+
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ val = (data->fan_ctrl[attr->index] & SCH5636_FAN_ALARM) ? 1 : 0;
+ return snprintf(buf, PAGE_SIZE, "%d\n", val);
+}
+
+static struct sensor_device_attribute sch5636_attr[] = {
+ SENSOR_ATTR(name, 0444, show_name, NULL, 0),
+ SENSOR_ATTR(in0_input, 0444, show_in_value, NULL, 0),
+ SENSOR_ATTR(in0_label, 0444, show_in_label, NULL, 0),
+ SENSOR_ATTR(in1_input, 0444, show_in_value, NULL, 1),
+ SENSOR_ATTR(in1_label, 0444, show_in_label, NULL, 1),
+ SENSOR_ATTR(in2_input, 0444, show_in_value, NULL, 2),
+ SENSOR_ATTR(in2_label, 0444, show_in_label, NULL, 2),
+ SENSOR_ATTR(in3_input, 0444, show_in_value, NULL, 3),
+ SENSOR_ATTR(in3_label, 0444, show_in_label, NULL, 3),
+ SENSOR_ATTR(in4_input, 0444, show_in_value, NULL, 4),
+ SENSOR_ATTR(in4_label, 0444, show_in_label, NULL, 4),
+};
+
+static struct sensor_device_attribute sch5636_temp_attr[] = {
+ SENSOR_ATTR(temp1_input, 0444, show_temp_value, NULL, 0),
+ SENSOR_ATTR(temp1_fault, 0444, show_temp_fault, NULL, 0),
+ SENSOR_ATTR(temp1_alarm, 0444, show_temp_alarm, NULL, 0),
+ SENSOR_ATTR(temp2_input, 0444, show_temp_value, NULL, 1),
+ SENSOR_ATTR(temp2_fault, 0444, show_temp_fault, NULL, 1),
+ SENSOR_ATTR(temp2_alarm, 0444, show_temp_alarm, NULL, 1),
+ SENSOR_ATTR(temp3_input, 0444, show_temp_value, NULL, 2),
+ SENSOR_ATTR(temp3_fault, 0444, show_temp_fault, NULL, 2),
+ SENSOR_ATTR(temp3_alarm, 0444, show_temp_alarm, NULL, 2),
+ SENSOR_ATTR(temp4_input, 0444, show_temp_value, NULL, 3),
+ SENSOR_ATTR(temp4_fault, 0444, show_temp_fault, NULL, 3),
+ SENSOR_ATTR(temp4_alarm, 0444, show_temp_alarm, NULL, 3),
+ SENSOR_ATTR(temp5_input, 0444, show_temp_value, NULL, 4),
+ SENSOR_ATTR(temp5_fault, 0444, show_temp_fault, NULL, 4),
+ SENSOR_ATTR(temp5_alarm, 0444, show_temp_alarm, NULL, 4),
+ SENSOR_ATTR(temp6_input, 0444, show_temp_value, NULL, 5),
+ SENSOR_ATTR(temp6_fault, 0444, show_temp_fault, NULL, 5),
+ SENSOR_ATTR(temp6_alarm, 0444, show_temp_alarm, NULL, 5),
+ SENSOR_ATTR(temp7_input, 0444, show_temp_value, NULL, 6),
+ SENSOR_ATTR(temp7_fault, 0444, show_temp_fault, NULL, 6),
+ SENSOR_ATTR(temp7_alarm, 0444, show_temp_alarm, NULL, 6),
+ SENSOR_ATTR(temp8_input, 0444, show_temp_value, NULL, 7),
+ SENSOR_ATTR(temp8_fault, 0444, show_temp_fault, NULL, 7),
+ SENSOR_ATTR(temp8_alarm, 0444, show_temp_alarm, NULL, 7),
+ SENSOR_ATTR(temp9_input, 0444, show_temp_value, NULL, 8),
+ SENSOR_ATTR(temp9_fault, 0444, show_temp_fault, NULL, 8),
+ SENSOR_ATTR(temp9_alarm, 0444, show_temp_alarm, NULL, 8),
+ SENSOR_ATTR(temp10_input, 0444, show_temp_value, NULL, 9),
+ SENSOR_ATTR(temp10_fault, 0444, show_temp_fault, NULL, 9),
+ SENSOR_ATTR(temp10_alarm, 0444, show_temp_alarm, NULL, 9),
+ SENSOR_ATTR(temp11_input, 0444, show_temp_value, NULL, 10),
+ SENSOR_ATTR(temp11_fault, 0444, show_temp_fault, NULL, 10),
+ SENSOR_ATTR(temp11_alarm, 0444, show_temp_alarm, NULL, 10),
+ SENSOR_ATTR(temp12_input, 0444, show_temp_value, NULL, 11),
+ SENSOR_ATTR(temp12_fault, 0444, show_temp_fault, NULL, 11),
+ SENSOR_ATTR(temp12_alarm, 0444, show_temp_alarm, NULL, 11),
+ SENSOR_ATTR(temp13_input, 0444, show_temp_value, NULL, 12),
+ SENSOR_ATTR(temp13_fault, 0444, show_temp_fault, NULL, 12),
+ SENSOR_ATTR(temp13_alarm, 0444, show_temp_alarm, NULL, 12),
+ SENSOR_ATTR(temp14_input, 0444, show_temp_value, NULL, 13),
+ SENSOR_ATTR(temp14_fault, 0444, show_temp_fault, NULL, 13),
+ SENSOR_ATTR(temp14_alarm, 0444, show_temp_alarm, NULL, 13),
+ SENSOR_ATTR(temp15_input, 0444, show_temp_value, NULL, 14),
+ SENSOR_ATTR(temp15_fault, 0444, show_temp_fault, NULL, 14),
+ SENSOR_ATTR(temp15_alarm, 0444, show_temp_alarm, NULL, 14),
+ SENSOR_ATTR(temp16_input, 0444, show_temp_value, NULL, 15),
+ SENSOR_ATTR(temp16_fault, 0444, show_temp_fault, NULL, 15),
+ SENSOR_ATTR(temp16_alarm, 0444, show_temp_alarm, NULL, 15),
+};
+
+static struct sensor_device_attribute sch5636_fan_attr[] = {
+ SENSOR_ATTR(fan1_input, 0444, show_fan_value, NULL, 0),
+ SENSOR_ATTR(fan1_fault, 0444, show_fan_fault, NULL, 0),
+ SENSOR_ATTR(fan1_alarm, 0444, show_fan_alarm, NULL, 0),
+ SENSOR_ATTR(fan2_input, 0444, show_fan_value, NULL, 1),
+ SENSOR_ATTR(fan2_fault, 0444, show_fan_fault, NULL, 1),
+ SENSOR_ATTR(fan2_alarm, 0444, show_fan_alarm, NULL, 1),
+ SENSOR_ATTR(fan3_input, 0444, show_fan_value, NULL, 2),
+ SENSOR_ATTR(fan3_fault, 0444, show_fan_fault, NULL, 2),
+ SENSOR_ATTR(fan3_alarm, 0444, show_fan_alarm, NULL, 2),
+ SENSOR_ATTR(fan4_input, 0444, show_fan_value, NULL, 3),
+ SENSOR_ATTR(fan4_fault, 0444, show_fan_fault, NULL, 3),
+ SENSOR_ATTR(fan4_alarm, 0444, show_fan_alarm, NULL, 3),
+ SENSOR_ATTR(fan5_input, 0444, show_fan_value, NULL, 4),
+ SENSOR_ATTR(fan5_fault, 0444, show_fan_fault, NULL, 4),
+ SENSOR_ATTR(fan5_alarm, 0444, show_fan_alarm, NULL, 4),
+ SENSOR_ATTR(fan6_input, 0444, show_fan_value, NULL, 5),
+ SENSOR_ATTR(fan6_fault, 0444, show_fan_fault, NULL, 5),
+ SENSOR_ATTR(fan6_alarm, 0444, show_fan_alarm, NULL, 5),
+ SENSOR_ATTR(fan7_input, 0444, show_fan_value, NULL, 6),
+ SENSOR_ATTR(fan7_fault, 0444, show_fan_fault, NULL, 6),
+ SENSOR_ATTR(fan7_alarm, 0444, show_fan_alarm, NULL, 6),
+ SENSOR_ATTR(fan8_input, 0444, show_fan_value, NULL, 7),
+ SENSOR_ATTR(fan8_fault, 0444, show_fan_fault, NULL, 7),
+ SENSOR_ATTR(fan8_alarm, 0444, show_fan_alarm, NULL, 7),
+};
+
+static int sch5636_remove(struct platform_device *pdev)
+{
+ struct sch5636_data *data = platform_get_drvdata(pdev);
+ int i;
+
+ if (data->hwmon_dev)
+ hwmon_device_unregister(data->hwmon_dev);
+
+ for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++)
+ device_remove_file(&pdev->dev, &sch5636_attr[i].dev_attr);
+
+ for (i = 0; i < SCH5636_NO_TEMPS * 3; i++)
+ device_remove_file(&pdev->dev,
+ &sch5636_temp_attr[i].dev_attr);
+
+ for (i = 0; i < SCH5636_NO_FANS * 3; i++)
+ device_remove_file(&pdev->dev,
+ &sch5636_fan_attr[i].dev_attr);
+
+ platform_set_drvdata(pdev, NULL);
+ kfree(data);
+
+ return 0;
+}
+
+static int __devinit sch5636_probe(struct platform_device *pdev)
+{
+ struct sch5636_data *data;
+ int i, err, val, revision[2];
+ char id[4];
+
+ data = kzalloc(sizeof(struct sch5636_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
+ mutex_init(&data->update_lock);
+ platform_set_drvdata(pdev, data);
+
+ for (i = 0; i < 3; i++) {
+ val = sch56xx_read_virtual_reg(data->addr,
+ SCH5636_REG_FUJITSU_ID + i);
+ if (val < 0) {
+ pr_err("Could not read Fujitsu id byte at %#x\n",
+ SCH5636_REG_FUJITSU_ID + i);
+ err = val;
+ goto error;
+ }
+ id[i] = val;
+ }
+ id[i] = '\0';
+
+ if (strcmp(id, "THS")) {
+ pr_err("Unknown Fujitsu id: %02x%02x%02x\n",
+ id[0], id[1], id[2]);
+ err = -ENODEV;
+ goto error;
+ }
+
+ for (i = 0; i < 2; i++) {
+ val = sch56xx_read_virtual_reg(data->addr,
+ SCH5636_REG_FUJITSU_REV + i);
+ if (val < 0) {
+ err = val;
+ goto error;
+ }
+ revision[i] = val;
+ }
+ pr_info("Found %s chip at %#hx, revison: %d.%02d\n", DEVNAME,
+ data->addr, revision[0], revision[1]);
+
+ /* Read all temp + fan ctrl registers to determine which are active */
+ for (i = 0; i < SCH5636_NO_TEMPS; i++) {
+ val = sch56xx_read_virtual_reg(data->addr,
+ SCH5636_REG_TEMP_CTRL(i));
+ if (unlikely(val < 0)) {
+ err = val;
+ goto error;
+ }
+ data->temp_ctrl[i] = val;
+ }
+
+ for (i = 0; i < SCH5636_NO_FANS; i++) {
+ val = sch56xx_read_virtual_reg(data->addr,
+ SCH5636_REG_FAN_CTRL(i));
+ if (unlikely(val < 0)) {
+ err = val;
+ goto error;
+ }
+ data->fan_ctrl[i] = val;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) {
+ err = device_create_file(&pdev->dev,
+ &sch5636_attr[i].dev_attr);
+ if (err)
+ goto error;
+ }
+
+ for (i = 0; i < (SCH5636_NO_TEMPS * 3); i++) {
+ if (data->temp_ctrl[i/3] & SCH5636_TEMP_DEACTIVATED)
+ continue;
+
+ err = device_create_file(&pdev->dev,
+ &sch5636_temp_attr[i].dev_attr);
+ if (err)
+ goto error;
+ }
+
+ for (i = 0; i < (SCH5636_NO_FANS * 3); i++) {
+ if (data->fan_ctrl[i/3] & SCH5636_FAN_DEACTIVATED)
+ continue;
+
+ err = device_create_file(&pdev->dev,
+ &sch5636_fan_attr[i].dev_attr);
+ if (err)
+ goto error;
+ }
+
+ data->hwmon_dev = hwmon_device_register(&pdev->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ data->hwmon_dev = NULL;
+ goto error;
+ }
+
+ return 0;
+
+error:
+ sch5636_remove(pdev);
+ return err;
+}
+
+static struct platform_driver sch5636_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = DRVNAME,
+ },
+ .probe = sch5636_probe,
+ .remove = sch5636_remove,
+};
+
+static int __init sch5636_init(void)
+{
+ return platform_driver_register(&sch5636_driver);
+}
+
+static void __exit sch5636_exit(void)
+{
+ platform_driver_unregister(&sch5636_driver);
+}
+
+MODULE_DESCRIPTION("SMSC SCH5636 Hardware Monitoring Driver");
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_LICENSE("GPL");
+
+module_init(sch5636_init);
+module_exit(sch5636_exit);
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff