[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/hwmon/gl518sm.c b/ap/os/linux/linux-3.4.x/drivers/hwmon/gl518sm.c
new file mode 100644
index 0000000..764a083
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/hwmon/gl518sm.c
@@ -0,0 +1,723 @@
+/*
+ * gl518sm.c - Part of lm_sensors, Linux kernel modules for hardware
+ * monitoring
+ * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
+ * Kyosti Malkki <kmalkki@cc.hut.fi>
+ * Copyright (C) 2004 Hong-Gunn Chew <hglinux@gunnet.org> and
+ * Jean Delvare <khali@linux-fr.org>
+ *
+ * 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.
+ *
+ * Ported to Linux 2.6 by Hong-Gunn Chew with the help of Jean Delvare
+ * and advice of Greg Kroah-Hartman.
+ *
+ * Notes about the port:
+ * Release 0x00 of the GL518SM chipset doesn't support reading of in0,
+ * in1 nor in2. The original driver had an ugly workaround to get them
+ * anyway (changing limits and watching alarms trigger and wear off).
+ * We did not keep that part of the original driver in the Linux 2.6
+ * version, since it was making the driver significantly more complex
+ * with no real benefit.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/sysfs.h>
+
+/* Addresses to scan */
+static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
+
+enum chips { gl518sm_r00, gl518sm_r80 };
+
+/* Many GL518 constants specified below */
+
+/* The GL518 registers */
+#define GL518_REG_CHIP_ID 0x00
+#define GL518_REG_REVISION 0x01
+#define GL518_REG_VENDOR_ID 0x02
+#define GL518_REG_CONF 0x03
+#define GL518_REG_TEMP_IN 0x04
+#define GL518_REG_TEMP_MAX 0x05
+#define GL518_REG_TEMP_HYST 0x06
+#define GL518_REG_FAN_COUNT 0x07
+#define GL518_REG_FAN_LIMIT 0x08
+#define GL518_REG_VIN1_LIMIT 0x09
+#define GL518_REG_VIN2_LIMIT 0x0a
+#define GL518_REG_VIN3_LIMIT 0x0b
+#define GL518_REG_VDD_LIMIT 0x0c
+#define GL518_REG_VIN3 0x0d
+#define GL518_REG_MISC 0x0f
+#define GL518_REG_ALARM 0x10
+#define GL518_REG_MASK 0x11
+#define GL518_REG_INT 0x12
+#define GL518_REG_VIN2 0x13
+#define GL518_REG_VIN1 0x14
+#define GL518_REG_VDD 0x15
+
+
+/*
+ * Conversions. Rounding and limit checking is only done on the TO_REG
+ * variants. Note that you should be a bit careful with which arguments
+ * these macros are called: arguments may be evaluated more than once.
+ * Fixing this is just not worth it.
+ */
+
+#define RAW_FROM_REG(val) val
+
+#define BOOL_FROM_REG(val) ((val) ? 0 : 1)
+#define BOOL_TO_REG(val) ((val) ? 0 : 1)
+
+#define TEMP_TO_REG(val) SENSORS_LIMIT(((((val) < 0 ? \
+ (val) - 500 : \
+ (val) + 500) / 1000) + 119), 0, 255)
+#define TEMP_FROM_REG(val) (((val) - 119) * 1000)
+
+static inline u8 FAN_TO_REG(long rpm, int div)
+{
+ long rpmdiv;
+ if (rpm == 0)
+ return 0;
+ rpmdiv = SENSORS_LIMIT(rpm, 1, 960000) * div;
+ return SENSORS_LIMIT((480000 + rpmdiv / 2) / rpmdiv, 1, 255);
+}
+#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) * (div))))
+
+#define IN_TO_REG(val) SENSORS_LIMIT((((val) + 9) / 19), 0, 255)
+#define IN_FROM_REG(val) ((val) * 19)
+
+#define VDD_TO_REG(val) SENSORS_LIMIT((((val) * 4 + 47) / 95), 0, 255)
+#define VDD_FROM_REG(val) (((val) * 95 + 2) / 4)
+
+#define DIV_FROM_REG(val) (1 << (val))
+
+#define BEEP_MASK_TO_REG(val) ((val) & 0x7f & data->alarm_mask)
+#define BEEP_MASK_FROM_REG(val) ((val) & 0x7f)
+
+/* Each client has this additional data */
+struct gl518_data {
+ struct device *hwmon_dev;
+ enum chips type;
+
+ struct mutex update_lock;
+ char valid; /* !=0 if following fields are valid */
+ unsigned long last_updated; /* In jiffies */
+
+ u8 voltage_in[4]; /* Register values; [0] = VDD */
+ u8 voltage_min[4]; /* Register values; [0] = VDD */
+ u8 voltage_max[4]; /* Register values; [0] = VDD */
+ u8 fan_in[2];
+ u8 fan_min[2];
+ u8 fan_div[2]; /* Register encoding, shifted right */
+ u8 fan_auto1; /* Boolean */
+ u8 temp_in; /* Register values */
+ u8 temp_max; /* Register values */
+ u8 temp_hyst; /* Register values */
+ u8 alarms; /* Register value */
+ u8 alarm_mask;
+ u8 beep_mask; /* Register value */
+ u8 beep_enable; /* Boolean */
+};
+
+static int gl518_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info);
+static void gl518_init_client(struct i2c_client *client);
+static int gl518_remove(struct i2c_client *client);
+static int gl518_read_value(struct i2c_client *client, u8 reg);
+static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value);
+static struct gl518_data *gl518_update_device(struct device *dev);
+
+static const struct i2c_device_id gl518_id[] = {
+ { "gl518sm", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, gl518_id);
+
+/* This is the driver that will be inserted */
+static struct i2c_driver gl518_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = "gl518sm",
+ },
+ .probe = gl518_probe,
+ .remove = gl518_remove,
+ .id_table = gl518_id,
+ .detect = gl518_detect,
+ .address_list = normal_i2c,
+};
+
+/*
+ * Sysfs stuff
+ */
+
+#define show(type, suffix, value) \
+static ssize_t show_##suffix(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct gl518_data *data = gl518_update_device(dev); \
+ return sprintf(buf, "%d\n", type##_FROM_REG(data->value)); \
+}
+
+show(TEMP, temp_input1, temp_in);
+show(TEMP, temp_max1, temp_max);
+show(TEMP, temp_hyst1, temp_hyst);
+show(BOOL, fan_auto1, fan_auto1);
+show(VDD, in_input0, voltage_in[0]);
+show(IN, in_input1, voltage_in[1]);
+show(IN, in_input2, voltage_in[2]);
+show(IN, in_input3, voltage_in[3]);
+show(VDD, in_min0, voltage_min[0]);
+show(IN, in_min1, voltage_min[1]);
+show(IN, in_min2, voltage_min[2]);
+show(IN, in_min3, voltage_min[3]);
+show(VDD, in_max0, voltage_max[0]);
+show(IN, in_max1, voltage_max[1]);
+show(IN, in_max2, voltage_max[2]);
+show(IN, in_max3, voltage_max[3]);
+show(RAW, alarms, alarms);
+show(BOOL, beep_enable, beep_enable);
+show(BEEP_MASK, beep_mask, beep_mask);
+
+static ssize_t show_fan_input(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct gl518_data *data = gl518_update_device(dev);
+ return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr],
+ DIV_FROM_REG(data->fan_div[nr])));
+}
+
+static ssize_t show_fan_min(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct gl518_data *data = gl518_update_device(dev);
+ return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
+ DIV_FROM_REG(data->fan_div[nr])));
+}
+
+static ssize_t show_fan_div(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct gl518_data *data = gl518_update_device(dev);
+ return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
+}
+
+#define set(type, suffix, value, reg) \
+static ssize_t set_##suffix(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct gl518_data *data = i2c_get_clientdata(client); \
+ long val; \
+ int err = kstrtol(buf, 10, &val); \
+ if (err) \
+ return err; \
+ \
+ mutex_lock(&data->update_lock); \
+ data->value = type##_TO_REG(val); \
+ gl518_write_value(client, reg, data->value); \
+ mutex_unlock(&data->update_lock); \
+ return count; \
+}
+
+#define set_bits(type, suffix, value, reg, mask, shift) \
+static ssize_t set_##suffix(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t count) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct gl518_data *data = i2c_get_clientdata(client); \
+ int regvalue; \
+ unsigned long val; \
+ int err = kstrtoul(buf, 10, &val); \
+ if (err) \
+ return err; \
+ \
+ mutex_lock(&data->update_lock); \
+ regvalue = gl518_read_value(client, reg); \
+ data->value = type##_TO_REG(val); \
+ regvalue = (regvalue & ~mask) | (data->value << shift); \
+ gl518_write_value(client, reg, regvalue); \
+ mutex_unlock(&data->update_lock); \
+ return count; \
+}
+
+#define set_low(type, suffix, value, reg) \
+ set_bits(type, suffix, value, reg, 0x00ff, 0)
+#define set_high(type, suffix, value, reg) \
+ set_bits(type, suffix, value, reg, 0xff00, 8)
+
+set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX);
+set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST);
+set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3);
+set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT);
+set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT);
+set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT);
+set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT);
+set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT);
+set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT);
+set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT);
+set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT);
+set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2);
+set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM);
+
+static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct gl518_data *data = i2c_get_clientdata(client);
+ int nr = to_sensor_dev_attr(attr)->index;
+ int regvalue;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT);
+ data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
+ regvalue = (regvalue & (0xff << (8 * nr)))
+ | (data->fan_min[nr] << (8 * (1 - nr)));
+ gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue);
+
+ data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
+ if (data->fan_min[nr] == 0)
+ data->alarm_mask &= ~(0x20 << nr);
+ else
+ data->alarm_mask |= (0x20 << nr);
+ data->beep_mask &= data->alarm_mask;
+ gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
+
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct gl518_data *data = i2c_get_clientdata(client);
+ int nr = to_sensor_dev_attr(attr)->index;
+ int regvalue;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ switch (val) {
+ case 1:
+ val = 0;
+ break;
+ case 2:
+ val = 1;
+ break;
+ case 4:
+ val = 2;
+ break;
+ case 8:
+ val = 3;
+ break;
+ default:
+ dev_err(dev, "Invalid fan clock divider %lu, choose one "
+ "of 1, 2, 4 or 8\n", val);
+ return -EINVAL;
+ }
+
+ mutex_lock(&data->update_lock);
+ regvalue = gl518_read_value(client, GL518_REG_MISC);
+ data->fan_div[nr] = val;
+ regvalue = (regvalue & ~(0xc0 >> (2 * nr)))
+ | (data->fan_div[nr] << (6 - 2 * nr));
+ gl518_write_value(client, GL518_REG_MISC, regvalue);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
+static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1);
+static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO,
+ show_temp_hyst1, set_temp_hyst1);
+static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1);
+static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO,
+ show_fan_min, set_fan_min, 0);
+static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO,
+ show_fan_min, set_fan_min, 1);
+static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO,
+ show_fan_div, set_fan_div, 0);
+static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO,
+ show_fan_div, set_fan_div, 1);
+static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
+static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
+static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
+static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
+static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0);
+static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1);
+static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2);
+static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3);
+static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0);
+static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1);
+static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2);
+static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3);
+static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
+static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO,
+ show_beep_enable, set_beep_enable);
+static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO,
+ show_beep_mask, set_beep_mask);
+
+static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int bitnr = to_sensor_dev_attr(attr)->index;
+ struct gl518_data *data = gl518_update_device(dev);
+ return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
+}
+
+static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
+static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
+static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
+static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
+static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5);
+static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6);
+
+static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int bitnr = to_sensor_dev_attr(attr)->index;
+ struct gl518_data *data = gl518_update_device(dev);
+ return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
+}
+
+static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct gl518_data *data = i2c_get_clientdata(client);
+ int bitnr = to_sensor_dev_attr(attr)->index;
+ unsigned long bit;
+ int err;
+
+ err = kstrtoul(buf, 10, &bit);
+ if (err)
+ return err;
+
+ if (bit & ~1)
+ return -EINVAL;
+
+ mutex_lock(&data->update_lock);
+ data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
+ if (bit)
+ data->beep_mask |= (1 << bitnr);
+ else
+ data->beep_mask &= ~(1 << bitnr);
+ gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1);
+static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2);
+static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3);
+static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4);
+static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5);
+static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6);
+
+static struct attribute *gl518_attributes[] = {
+ &dev_attr_in3_input.attr,
+ &dev_attr_in0_min.attr,
+ &dev_attr_in1_min.attr,
+ &dev_attr_in2_min.attr,
+ &dev_attr_in3_min.attr,
+ &dev_attr_in0_max.attr,
+ &dev_attr_in1_max.attr,
+ &dev_attr_in2_max.attr,
+ &dev_attr_in3_max.attr,
+ &sensor_dev_attr_in0_alarm.dev_attr.attr,
+ &sensor_dev_attr_in1_alarm.dev_attr.attr,
+ &sensor_dev_attr_in2_alarm.dev_attr.attr,
+ &sensor_dev_attr_in3_alarm.dev_attr.attr,
+ &sensor_dev_attr_in0_beep.dev_attr.attr,
+ &sensor_dev_attr_in1_beep.dev_attr.attr,
+ &sensor_dev_attr_in2_beep.dev_attr.attr,
+ &sensor_dev_attr_in3_beep.dev_attr.attr,
+
+ &dev_attr_fan1_auto.attr,
+ &sensor_dev_attr_fan1_input.dev_attr.attr,
+ &sensor_dev_attr_fan2_input.dev_attr.attr,
+ &sensor_dev_attr_fan1_min.dev_attr.attr,
+ &sensor_dev_attr_fan2_min.dev_attr.attr,
+ &sensor_dev_attr_fan1_div.dev_attr.attr,
+ &sensor_dev_attr_fan2_div.dev_attr.attr,
+ &sensor_dev_attr_fan1_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan2_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan1_beep.dev_attr.attr,
+ &sensor_dev_attr_fan2_beep.dev_attr.attr,
+
+ &dev_attr_temp1_input.attr,
+ &dev_attr_temp1_max.attr,
+ &dev_attr_temp1_max_hyst.attr,
+ &sensor_dev_attr_temp1_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp1_beep.dev_attr.attr,
+
+ &dev_attr_alarms.attr,
+ &dev_attr_beep_enable.attr,
+ &dev_attr_beep_mask.attr,
+ NULL
+};
+
+static const struct attribute_group gl518_group = {
+ .attrs = gl518_attributes,
+};
+
+static struct attribute *gl518_attributes_r80[] = {
+ &dev_attr_in0_input.attr,
+ &dev_attr_in1_input.attr,
+ &dev_attr_in2_input.attr,
+ NULL
+};
+
+static const struct attribute_group gl518_group_r80 = {
+ .attrs = gl518_attributes_r80,
+};
+
+/*
+ * Real code
+ */
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ int rev;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
+ I2C_FUNC_SMBUS_WORD_DATA))
+ return -ENODEV;
+
+ /* Now, we do the remaining detection. */
+ if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80)
+ || (gl518_read_value(client, GL518_REG_CONF) & 0x80))
+ return -ENODEV;
+
+ /* Determine the chip type. */
+ rev = gl518_read_value(client, GL518_REG_REVISION);
+ if (rev != 0x00 && rev != 0x80)
+ return -ENODEV;
+
+ strlcpy(info->type, "gl518sm", I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int gl518_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct gl518_data *data;
+ int err, revision;
+
+ data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ i2c_set_clientdata(client, data);
+ revision = gl518_read_value(client, GL518_REG_REVISION);
+ data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00;
+ mutex_init(&data->update_lock);
+
+ /* Initialize the GL518SM chip */
+ data->alarm_mask = 0xff;
+ gl518_init_client(client);
+
+ /* Register sysfs hooks */
+ err = sysfs_create_group(&client->dev.kobj, &gl518_group);
+ if (err)
+ goto exit_free;
+ if (data->type == gl518sm_r80) {
+ err = sysfs_create_group(&client->dev.kobj, &gl518_group_r80);
+ if (err)
+ goto exit_remove_files;
+ }
+
+ data->hwmon_dev = hwmon_device_register(&client->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ goto exit_remove_files;
+ }
+
+ return 0;
+
+exit_remove_files:
+ sysfs_remove_group(&client->dev.kobj, &gl518_group);
+ if (data->type == gl518sm_r80)
+ sysfs_remove_group(&client->dev.kobj, &gl518_group_r80);
+exit_free:
+ kfree(data);
+exit:
+ return err;
+}
+
+
+/*
+ * Called when we have found a new GL518SM.
+ * Note that we preserve D4:NoFan2 and D2:beep_enable.
+ */
+static void gl518_init_client(struct i2c_client *client)
+{
+ /* Make sure we leave D7:Reset untouched */
+ u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f;
+
+ /* Comparator mode (D3=0), standby mode (D6=0) */
+ gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37));
+
+ /* Never interrupts */
+ gl518_write_value(client, GL518_REG_MASK, 0x00);
+
+ /* Clear status register (D5=1), start (D6=1) */
+ gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue);
+ gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue);
+}
+
+static int gl518_remove(struct i2c_client *client)
+{
+ struct gl518_data *data = i2c_get_clientdata(client);
+
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&client->dev.kobj, &gl518_group);
+ if (data->type == gl518sm_r80)
+ sysfs_remove_group(&client->dev.kobj, &gl518_group_r80);
+
+ kfree(data);
+ return 0;
+}
+
+/*
+ * Registers 0x07 to 0x0c are word-sized, others are byte-sized
+ * GL518 uses a high-byte first convention, which is exactly opposite to
+ * the SMBus standard.
+ */
+static int gl518_read_value(struct i2c_client *client, u8 reg)
+{
+ if ((reg >= 0x07) && (reg <= 0x0c))
+ return i2c_smbus_read_word_swapped(client, reg);
+ else
+ return i2c_smbus_read_byte_data(client, reg);
+}
+
+static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value)
+{
+ if ((reg >= 0x07) && (reg <= 0x0c))
+ return i2c_smbus_write_word_swapped(client, reg, value);
+ else
+ return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+static struct gl518_data *gl518_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct gl518_data *data = i2c_get_clientdata(client);
+ int val;
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
+ || !data->valid) {
+ dev_dbg(&client->dev, "Starting gl518 update\n");
+
+ data->alarms = gl518_read_value(client, GL518_REG_INT);
+ data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
+
+ val = gl518_read_value(client, GL518_REG_VDD_LIMIT);
+ data->voltage_min[0] = val & 0xff;
+ data->voltage_max[0] = (val >> 8) & 0xff;
+ val = gl518_read_value(client, GL518_REG_VIN1_LIMIT);
+ data->voltage_min[1] = val & 0xff;
+ data->voltage_max[1] = (val >> 8) & 0xff;
+ val = gl518_read_value(client, GL518_REG_VIN2_LIMIT);
+ data->voltage_min[2] = val & 0xff;
+ data->voltage_max[2] = (val >> 8) & 0xff;
+ val = gl518_read_value(client, GL518_REG_VIN3_LIMIT);
+ data->voltage_min[3] = val & 0xff;
+ data->voltage_max[3] = (val >> 8) & 0xff;
+
+ val = gl518_read_value(client, GL518_REG_FAN_COUNT);
+ data->fan_in[0] = (val >> 8) & 0xff;
+ data->fan_in[1] = val & 0xff;
+
+ val = gl518_read_value(client, GL518_REG_FAN_LIMIT);
+ data->fan_min[0] = (val >> 8) & 0xff;
+ data->fan_min[1] = val & 0xff;
+
+ data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN);
+ data->temp_max =
+ gl518_read_value(client, GL518_REG_TEMP_MAX);
+ data->temp_hyst =
+ gl518_read_value(client, GL518_REG_TEMP_HYST);
+
+ val = gl518_read_value(client, GL518_REG_MISC);
+ data->fan_div[0] = (val >> 6) & 0x03;
+ data->fan_div[1] = (val >> 4) & 0x03;
+ data->fan_auto1 = (val >> 3) & 0x01;
+
+ data->alarms &= data->alarm_mask;
+
+ val = gl518_read_value(client, GL518_REG_CONF);
+ data->beep_enable = (val >> 2) & 1;
+
+ if (data->type != gl518sm_r00) {
+ data->voltage_in[0] =
+ gl518_read_value(client, GL518_REG_VDD);
+ data->voltage_in[1] =
+ gl518_read_value(client, GL518_REG_VIN1);
+ data->voltage_in[2] =
+ gl518_read_value(client, GL518_REG_VIN2);
+ }
+ data->voltage_in[3] =
+ gl518_read_value(client, GL518_REG_VIN3);
+
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ mutex_unlock(&data->update_lock);
+
+ return data;
+}
+
+module_i2c_driver(gl518_driver);
+
+MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
+ "Kyosti Malkki <kmalkki@cc.hut.fi> and "
+ "Hong-Gunn Chew <hglinux@gunnet.org>");
+MODULE_DESCRIPTION("GL518SM driver");
+MODULE_LICENSE("GPL");