/* * 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. * * History: * 2004-01-28 Original port. (Hong-Gunn Chew) * 2004-01-31 Code review and approval. (Jean Delvare) */ #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/err.h> /* Addresses to scan */ static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; /* Insmod parameters */ I2C_CLIENT_INSMOD_2(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, 1920000) * div; return SENSORS_LIMIT((960000 + rpmdiv / 2) / rpmdiv, 1, 255); } #define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (960000/((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_TO_REG(val) ((val)==4?2:(val)==2?1:(val)==1?0:3) #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 i2c_client client; struct class_device *class_dev; enum chips type; struct semaphore 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 iter_voltage_in[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; /* Register value */ u8 beep_mask; /* Register value */ u8 beep_enable; /* Boolean */ }; static int gl518_attach_adapter(struct i2c_adapter *adapter); static int gl518_detect(struct i2c_adapter *adapter, int address, int kind); static void gl518_init_client(struct i2c_client *client); static int gl518_detach_client(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); /* This is the driver that will be inserted */ static struct i2c_driver gl518_driver = { .driver = { .name = "gl518sm", }, .id = I2C_DRIVERID_GL518, .attach_adapter = gl518_attach_adapter, .detach_client = gl518_detach_client, }; /* * 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)); \ } #define show_fan(suffix, value, index) \ 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", FAN_FROM_REG(data->value[index], \ DIV_FROM_REG(data->fan_div[index]))); \ } 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_fan(fan_input1, fan_in, 0); show_fan(fan_input2, fan_in, 1); show_fan(fan_min1, fan_min, 0); show_fan(fan_min2, fan_min, 1); show(DIV, fan_div1, fan_div[0]); show(DIV, fan_div2, fan_div[1]); 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); #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 = simple_strtol(buf, NULL, 10); \ \ down(&data->update_lock); \ data->value = type##_TO_REG(val); \ gl518_write_value(client, reg, data->value); \ up(&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 = simple_strtoul(buf, NULL, 10); \ \ down(&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); \ up(&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_bits(DIV, fan_div1, fan_div[0], GL518_REG_MISC, 0xc0, 6); set_bits(DIV, fan_div2, fan_div[1], GL518_REG_MISC, 0x30, 4); 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_min1(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 = simple_strtoul(buf, NULL, 10); down(&data->update_lock); regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT); data->fan_min[0] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[0])); regvalue = (regvalue & 0x00ff) | (data->fan_min[0] << 8); gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue); data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); if (data->fan_min[0] == 0) data->alarm_mask &= ~0x20; else data->alarm_mask |= 0x20; data->beep_mask &= data->alarm_mask; gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); up(&data->update_lock); return count; } static ssize_t set_fan_min2(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 = simple_strtoul(buf, NULL, 10); down(&data->update_lock); regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT); data->fan_min[1] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[1])); regvalue = (regvalue & 0xff00) | data->fan_min[1]; gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue); data->beep_mask = gl518_read_value(client, GL518_REG_ALARM); if (data->fan_min[1] == 0) data->alarm_mask &= ~0x40; else data->alarm_mask |= 0x40; data->beep_mask &= data->alarm_mask; gl518_write_value(client, GL518_REG_ALARM, data->beep_mask); up(&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 DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input1, NULL); static DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input2, NULL); static DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO, show_fan_min1, set_fan_min1); static DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO, show_fan_min2, set_fan_min2); static DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO, show_fan_div1, set_fan_div1); static DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO, show_fan_div2, set_fan_div2); 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); /* * Real code */ static int gl518_attach_adapter(struct i2c_adapter *adapter) { if (!(adapter->class & I2C_CLASS_HWMON)) return 0; return i2c_probe(adapter, &addr_data, gl518_detect); } static int gl518_detect(struct i2c_adapter *adapter, int address, int kind) { int i; struct i2c_client *new_client; struct gl518_data *data; int err = 0; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA)) goto exit; /* OK. For now, we presume we have a valid client. We now create the client structure, even though we cannot fill it completely yet. But it allows us to access gl518_{read,write}_value. */ if (!(data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL))) { err = -ENOMEM; goto exit; } new_client = &data->client; i2c_set_clientdata(new_client, data); new_client->addr = address; new_client->adapter = adapter; new_client->driver = &gl518_driver; new_client->flags = 0; /* Now, we do the remaining detection. */ if (kind < 0) { if ((gl518_read_value(new_client, GL518_REG_CHIP_ID) != 0x80) || (gl518_read_value(new_client, GL518_REG_CONF) & 0x80)) goto exit_free; } /* Determine the chip type. */ if (kind <= 0) { i = gl518_read_value(new_client, GL518_REG_REVISION); if (i == 0x00) { kind = gl518sm_r00; } else if (i == 0x80) { kind = gl518sm_r80; } else { if (kind <= 0) dev_info(&adapter->dev, "Ignoring 'force' parameter for unknown " "chip at adapter %d, address 0x%02x\n", i2c_adapter_id(adapter), address); goto exit_free; } } /* Fill in the remaining client fields */ strlcpy(new_client->name, "gl518sm", I2C_NAME_SIZE); data->type = kind; data->valid = 0; init_MUTEX(&data->update_lock); /* Tell the I2C layer a new client has arrived */ if ((err = i2c_attach_client(new_client))) goto exit_free; /* Initialize the GL518SM chip */ data->alarm_mask = 0xff; data->voltage_in[0]=data->voltage_in[1]=data->voltage_in[2]=0; gl518_init_client((struct i2c_client *) new_client); /* Register sysfs hooks */ data->class_dev = hwmon_device_register(&new_client->dev); if (IS_ERR(data->class_dev)) { err = PTR_ERR(data->class_dev); goto exit_detach; } device_create_file(&new_client->dev, &dev_attr_in0_input); device_create_file(&new_client->dev, &dev_attr_in1_input); device_create_file(&new_client->dev, &dev_attr_in2_input); device_create_file(&new_client->dev, &dev_attr_in3_input); device_create_file(&new_client->dev, &dev_attr_in0_min); device_create_file(&new_client->dev, &dev_attr_in1_min); device_create_file(&new_client->dev, &dev_attr_in2_min); device_create_file(&new_client->dev, &dev_attr_in3_min); device_create_file(&new_client->dev, &dev_attr_in0_max); device_create_file(&new_client->dev, &dev_attr_in1_max); device_create_file(&new_client->dev, &dev_attr_in2_max); device_create_file(&new_client->dev, &dev_attr_in3_max); device_create_file(&new_client->dev, &dev_attr_fan1_auto); device_create_file(&new_client->dev, &dev_attr_fan1_input); device_create_file(&new_client->dev, &dev_attr_fan2_input); device_create_file(&new_client->dev, &dev_attr_fan1_min); device_create_file(&new_client->dev, &dev_attr_fan2_min); device_create_file(&new_client->dev, &dev_attr_fan1_div); device_create_file(&new_client->dev, &dev_attr_fan2_div); device_create_file(&new_client->dev, &dev_attr_temp1_input); device_create_file(&new_client->dev, &dev_attr_temp1_max); device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst); device_create_file(&new_client->dev, &dev_attr_alarms); device_create_file(&new_client->dev, &dev_attr_beep_enable); device_create_file(&new_client->dev, &dev_attr_beep_mask); return 0; /* OK, this is not exactly good programming practice, usually. But it is very code-efficient in this case. */ exit_detach: i2c_detach_client(new_client); 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_detach_client(struct i2c_client *client) { struct gl518_data *data = i2c_get_clientdata(client); int err; hwmon_device_unregister(data->class_dev); if ((err = i2c_detach_client(client))) return err; 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 usual practice. */ static int gl518_read_value(struct i2c_client *client, u8 reg) { if ((reg >= 0x07) && (reg <= 0x0c)) return swab16(i2c_smbus_read_word_data(client, reg)); else return i2c_smbus_read_byte_data(client, reg); } /* Registers 0x07 to 0x0c are word-sized, others are byte-sized GL518 uses a high-byte first convention, which is exactly opposite to the usual practice. */ static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value) { if ((reg >= 0x07) && (reg <= 0x0c)) return i2c_smbus_write_word_data(client, reg, swab16(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; down(&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; } up(&data->update_lock); return data; } static int __init sensors_gl518sm_init(void) { return i2c_add_driver(&gl518_driver); } static void __exit sensors_gl518sm_exit(void) { i2c_del_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"); module_init(sensors_gl518sm_init); module_exit(sensors_gl518sm_exit);