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![Andreas Mohr](/assets/img/avatar_default.png)
acquired (aquired) contiguous (contigious) successful (succesful, succesfull) surprise (suprise) whether (weather) some other misspellings Signed-off-by: Andreas Mohr <andi@lisas.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
825 lines
25 KiB
C
825 lines
25 KiB
C
/*
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lm78.c - Part of lm_sensors, Linux kernel modules for hardware
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monitoring
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Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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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/jiffies.h>
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#include <linux/i2c.h>
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#include <linux/i2c-isa.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-vid.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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#include <asm/io.h>
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/* Addresses to scan */
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static unsigned short normal_i2c[] = { 0x20, 0x21, 0x22, 0x23, 0x24,
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0x25, 0x26, 0x27, 0x28, 0x29,
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0x2a, 0x2b, 0x2c, 0x2d, 0x2e,
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0x2f, I2C_CLIENT_END };
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static unsigned short isa_address = 0x290;
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/* Insmod parameters */
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I2C_CLIENT_INSMOD_2(lm78, lm79);
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/* Many LM78 constants specified below */
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/* Length of ISA address segment */
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#define LM78_EXTENT 8
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/* Where are the ISA address/data registers relative to the base address */
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#define LM78_ADDR_REG_OFFSET 5
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#define LM78_DATA_REG_OFFSET 6
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/* The LM78 registers */
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#define LM78_REG_IN_MAX(nr) (0x2b + (nr) * 2)
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#define LM78_REG_IN_MIN(nr) (0x2c + (nr) * 2)
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#define LM78_REG_IN(nr) (0x20 + (nr))
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#define LM78_REG_FAN_MIN(nr) (0x3b + (nr))
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#define LM78_REG_FAN(nr) (0x28 + (nr))
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#define LM78_REG_TEMP 0x27
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#define LM78_REG_TEMP_OVER 0x39
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#define LM78_REG_TEMP_HYST 0x3a
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#define LM78_REG_ALARM1 0x41
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#define LM78_REG_ALARM2 0x42
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#define LM78_REG_VID_FANDIV 0x47
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#define LM78_REG_CONFIG 0x40
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#define LM78_REG_CHIPID 0x49
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#define LM78_REG_I2C_ADDR 0x48
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/* Conversions. Rounding and limit checking is only done on the TO_REG
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variants. */
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/* IN: mV, (0V to 4.08V)
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REG: 16mV/bit */
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static inline u8 IN_TO_REG(unsigned long val)
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{
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unsigned long nval = SENSORS_LIMIT(val, 0, 4080);
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return (nval + 8) / 16;
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}
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#define IN_FROM_REG(val) ((val) * 16)
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static inline u8 FAN_TO_REG(long rpm, int div)
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{
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if (rpm <= 0)
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return 255;
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return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
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}
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static inline int FAN_FROM_REG(u8 val, int div)
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{
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return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div);
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}
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/* TEMP: mC (-128C to +127C)
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REG: 1C/bit, two's complement */
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static inline s8 TEMP_TO_REG(int val)
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{
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int nval = SENSORS_LIMIT(val, -128000, 127000) ;
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return nval<0 ? (nval-500)/1000 : (nval+500)/1000;
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}
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static inline int TEMP_FROM_REG(s8 val)
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{
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return val * 1000;
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}
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#define DIV_FROM_REG(val) (1 << (val))
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/* There are some complications in a module like this. First off, LM78 chips
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may be both present on the SMBus and the ISA bus, and we have to handle
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those cases separately at some places. Second, there might be several
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LM78 chips available (well, actually, that is probably never done; but
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it is a clean illustration of how to handle a case like that). Finally,
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a specific chip may be attached to *both* ISA and SMBus, and we would
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not like to detect it double. Fortunately, in the case of the LM78 at
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least, a register tells us what SMBus address we are on, so that helps
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a bit - except if there could be more than one SMBus. Groan. No solution
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for this yet. */
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/* This module may seem overly long and complicated. In fact, it is not so
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bad. Quite a lot of bookkeeping is done. A real driver can often cut
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some corners. */
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/* For each registered LM78, we need to keep some data in memory. That
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data is pointed to by lm78_list[NR]->data. The structure itself is
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dynamically allocated, at the same time when a new lm78 client is
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allocated. */
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struct lm78_data {
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struct i2c_client client;
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struct class_device *class_dev;
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struct mutex lock;
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enum chips type;
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struct mutex update_lock;
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char valid; /* !=0 if following fields are valid */
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unsigned long last_updated; /* In jiffies */
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u8 in[7]; /* Register value */
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u8 in_max[7]; /* Register value */
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u8 in_min[7]; /* Register value */
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u8 fan[3]; /* Register value */
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u8 fan_min[3]; /* Register value */
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s8 temp; /* Register value */
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s8 temp_over; /* Register value */
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s8 temp_hyst; /* Register value */
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u8 fan_div[3]; /* Register encoding, shifted right */
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u8 vid; /* Register encoding, combined */
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u16 alarms; /* Register encoding, combined */
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};
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static int lm78_attach_adapter(struct i2c_adapter *adapter);
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static int lm78_isa_attach_adapter(struct i2c_adapter *adapter);
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static int lm78_detect(struct i2c_adapter *adapter, int address, int kind);
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static int lm78_detach_client(struct i2c_client *client);
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static int lm78_read_value(struct i2c_client *client, u8 reg);
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static int lm78_write_value(struct i2c_client *client, u8 reg, u8 value);
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static struct lm78_data *lm78_update_device(struct device *dev);
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static void lm78_init_client(struct i2c_client *client);
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static struct i2c_driver lm78_driver = {
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.driver = {
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.name = "lm78",
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},
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.id = I2C_DRIVERID_LM78,
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.attach_adapter = lm78_attach_adapter,
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.detach_client = lm78_detach_client,
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};
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static struct i2c_driver lm78_isa_driver = {
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.driver = {
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.name = "lm78-isa",
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},
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.attach_adapter = lm78_isa_attach_adapter,
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.detach_client = lm78_detach_client,
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};
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/* 7 Voltages */
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static ssize_t show_in(struct device *dev, char *buf, int nr)
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{
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struct lm78_data *data = lm78_update_device(dev);
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return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
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}
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static ssize_t show_in_min(struct device *dev, char *buf, int nr)
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{
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struct lm78_data *data = lm78_update_device(dev);
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return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
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}
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static ssize_t show_in_max(struct device *dev, char *buf, int nr)
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{
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struct lm78_data *data = lm78_update_device(dev);
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return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
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}
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static ssize_t set_in_min(struct device *dev, const char *buf,
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size_t count, int nr)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lm78_data *data = i2c_get_clientdata(client);
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unsigned long val = simple_strtoul(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->in_min[nr] = IN_TO_REG(val);
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lm78_write_value(client, LM78_REG_IN_MIN(nr), data->in_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 set_in_max(struct device *dev, const char *buf,
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size_t count, int nr)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lm78_data *data = i2c_get_clientdata(client);
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unsigned long val = simple_strtoul(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->in_max[nr] = IN_TO_REG(val);
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lm78_write_value(client, LM78_REG_IN_MAX(nr), data->in_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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#define show_in_offset(offset) \
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static ssize_t \
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show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \
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{ \
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return show_in(dev, buf, offset); \
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} \
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static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
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show_in##offset, NULL); \
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static ssize_t \
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show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
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{ \
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return show_in_min(dev, buf, offset); \
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} \
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static ssize_t \
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show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
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{ \
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return show_in_max(dev, buf, offset); \
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} \
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static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \
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const char *buf, size_t count) \
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{ \
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return set_in_min(dev, buf, count, offset); \
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} \
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static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \
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const char *buf, size_t count) \
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{ \
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return set_in_max(dev, buf, count, offset); \
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} \
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static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
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show_in##offset##_min, set_in##offset##_min); \
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static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
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show_in##offset##_max, set_in##offset##_max);
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show_in_offset(0);
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show_in_offset(1);
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show_in_offset(2);
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show_in_offset(3);
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show_in_offset(4);
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show_in_offset(5);
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show_in_offset(6);
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/* Temperature */
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static ssize_t show_temp(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct lm78_data *data = lm78_update_device(dev);
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
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}
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static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct lm78_data *data = lm78_update_device(dev);
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
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}
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static ssize_t set_temp_over(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lm78_data *data = i2c_get_clientdata(client);
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long val = simple_strtol(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->temp_over = TEMP_TO_REG(val);
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lm78_write_value(client, LM78_REG_TEMP_OVER, data->temp_over);
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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 show_temp_hyst(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct lm78_data *data = lm78_update_device(dev);
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
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}
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static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lm78_data *data = i2c_get_clientdata(client);
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long val = simple_strtol(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->temp_hyst = TEMP_TO_REG(val);
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lm78_write_value(client, LM78_REG_TEMP_HYST, data->temp_hyst);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL);
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static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
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show_temp_over, set_temp_over);
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static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
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show_temp_hyst, set_temp_hyst);
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/* 3 Fans */
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static ssize_t show_fan(struct device *dev, char *buf, int nr)
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{
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struct lm78_data *data = lm78_update_device(dev);
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return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
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DIV_FROM_REG(data->fan_div[nr])) );
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}
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static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
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{
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struct lm78_data *data = lm78_update_device(dev);
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return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan_min[nr],
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DIV_FROM_REG(data->fan_div[nr])) );
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}
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static ssize_t set_fan_min(struct device *dev, const char *buf,
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size_t count, int nr)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lm78_data *data = i2c_get_clientdata(client);
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unsigned long val = simple_strtoul(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
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lm78_write_value(client, LM78_REG_FAN_MIN(nr), data->fan_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 show_fan_div(struct device *dev, char *buf, int nr)
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{
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struct lm78_data *data = lm78_update_device(dev);
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return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]) );
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}
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/* Note: we save and restore the fan minimum here, because its value is
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determined in part by the fan divisor. This follows the principle of
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least surprise; the user doesn't expect the fan minimum to change just
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because the divisor changed. */
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static ssize_t set_fan_div(struct device *dev, const char *buf,
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size_t count, int nr)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lm78_data *data = i2c_get_clientdata(client);
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unsigned long val = simple_strtoul(buf, NULL, 10);
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unsigned long min;
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u8 reg;
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mutex_lock(&data->update_lock);
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min = FAN_FROM_REG(data->fan_min[nr],
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DIV_FROM_REG(data->fan_div[nr]));
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switch (val) {
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case 1: data->fan_div[nr] = 0; break;
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case 2: data->fan_div[nr] = 1; break;
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case 4: data->fan_div[nr] = 2; break;
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case 8: data->fan_div[nr] = 3; break;
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default:
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dev_err(&client->dev, "fan_div value %ld not "
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"supported. Choose one of 1, 2, 4 or 8!\n", val);
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mutex_unlock(&data->update_lock);
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return -EINVAL;
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}
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reg = lm78_read_value(client, LM78_REG_VID_FANDIV);
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switch (nr) {
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case 0:
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reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
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break;
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case 1:
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reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
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break;
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}
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lm78_write_value(client, LM78_REG_VID_FANDIV, reg);
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data->fan_min[nr] =
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FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
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lm78_write_value(client, LM78_REG_FAN_MIN(nr), data->fan_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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#define show_fan_offset(offset) \
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static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
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{ \
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return show_fan(dev, buf, offset - 1); \
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} \
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static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
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{ \
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return show_fan_min(dev, buf, offset - 1); \
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} \
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static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \
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{ \
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return show_fan_div(dev, buf, offset - 1); \
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} \
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static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr, \
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const char *buf, size_t count) \
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{ \
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return set_fan_min(dev, buf, count, offset - 1); \
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} \
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static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL);\
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static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
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show_fan_##offset##_min, set_fan_##offset##_min);
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static ssize_t set_fan_1_div(struct device *dev, struct device_attribute *attr, const char *buf,
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size_t count)
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{
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return set_fan_div(dev, buf, count, 0) ;
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}
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static ssize_t set_fan_2_div(struct device *dev, struct device_attribute *attr, const char *buf,
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size_t count)
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{
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return set_fan_div(dev, buf, count, 1) ;
|
|
}
|
|
|
|
show_fan_offset(1);
|
|
show_fan_offset(2);
|
|
show_fan_offset(3);
|
|
|
|
/* Fan 3 divisor is locked in H/W */
|
|
static DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
|
|
show_fan_1_div, set_fan_1_div);
|
|
static DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
|
|
show_fan_2_div, set_fan_2_div);
|
|
static DEVICE_ATTR(fan3_div, S_IRUGO, show_fan_3_div, NULL);
|
|
|
|
/* VID */
|
|
static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct lm78_data *data = lm78_update_device(dev);
|
|
return sprintf(buf, "%d\n", vid_from_reg(data->vid, 82));
|
|
}
|
|
static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
|
|
|
|
/* Alarms */
|
|
static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct lm78_data *data = lm78_update_device(dev);
|
|
return sprintf(buf, "%u\n", data->alarms);
|
|
}
|
|
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
|
|
|
|
/* This function is called when:
|
|
* lm78_driver is inserted (when this module is loaded), for each
|
|
available adapter
|
|
* when a new adapter is inserted (and lm78_driver is still present) */
|
|
static int lm78_attach_adapter(struct i2c_adapter *adapter)
|
|
{
|
|
if (!(adapter->class & I2C_CLASS_HWMON))
|
|
return 0;
|
|
return i2c_probe(adapter, &addr_data, lm78_detect);
|
|
}
|
|
|
|
static int lm78_isa_attach_adapter(struct i2c_adapter *adapter)
|
|
{
|
|
return lm78_detect(adapter, isa_address, -1);
|
|
}
|
|
|
|
/* This function is called by i2c_probe */
|
|
static int lm78_detect(struct i2c_adapter *adapter, int address, int kind)
|
|
{
|
|
int i, err;
|
|
struct i2c_client *new_client;
|
|
struct lm78_data *data;
|
|
const char *client_name = "";
|
|
int is_isa = i2c_is_isa_adapter(adapter);
|
|
|
|
if (!is_isa &&
|
|
!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
|
|
err = -ENODEV;
|
|
goto ERROR0;
|
|
}
|
|
|
|
/* Reserve the ISA region */
|
|
if (is_isa)
|
|
if (!request_region(address, LM78_EXTENT,
|
|
lm78_isa_driver.driver.name)) {
|
|
err = -EBUSY;
|
|
goto ERROR0;
|
|
}
|
|
|
|
/* Probe whether there is anything available on this address. Already
|
|
done for SMBus clients */
|
|
if (kind < 0) {
|
|
if (is_isa) {
|
|
|
|
#define REALLY_SLOW_IO
|
|
/* We need the timeouts for at least some LM78-like
|
|
chips. But only if we read 'undefined' registers. */
|
|
i = inb_p(address + 1);
|
|
if (inb_p(address + 2) != i) {
|
|
err = -ENODEV;
|
|
goto ERROR1;
|
|
}
|
|
if (inb_p(address + 3) != i) {
|
|
err = -ENODEV;
|
|
goto ERROR1;
|
|
}
|
|
if (inb_p(address + 7) != i) {
|
|
err = -ENODEV;
|
|
goto ERROR1;
|
|
}
|
|
#undef REALLY_SLOW_IO
|
|
|
|
/* Let's just hope nothing breaks here */
|
|
i = inb_p(address + 5) & 0x7f;
|
|
outb_p(~i & 0x7f, address + 5);
|
|
if ((inb_p(address + 5) & 0x7f) != (~i & 0x7f)) {
|
|
outb_p(i, address + 5);
|
|
err = -ENODEV;
|
|
goto ERROR1;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 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 lm78_{read,write}_value. */
|
|
|
|
if (!(data = kzalloc(sizeof(struct lm78_data), GFP_KERNEL))) {
|
|
err = -ENOMEM;
|
|
goto ERROR1;
|
|
}
|
|
|
|
new_client = &data->client;
|
|
if (is_isa)
|
|
mutex_init(&data->lock);
|
|
i2c_set_clientdata(new_client, data);
|
|
new_client->addr = address;
|
|
new_client->adapter = adapter;
|
|
new_client->driver = is_isa ? &lm78_isa_driver : &lm78_driver;
|
|
new_client->flags = 0;
|
|
|
|
/* Now, we do the remaining detection. */
|
|
if (kind < 0) {
|
|
if (lm78_read_value(new_client, LM78_REG_CONFIG) & 0x80) {
|
|
err = -ENODEV;
|
|
goto ERROR2;
|
|
}
|
|
if (!is_isa && (lm78_read_value(
|
|
new_client, LM78_REG_I2C_ADDR) != address)) {
|
|
err = -ENODEV;
|
|
goto ERROR2;
|
|
}
|
|
}
|
|
|
|
/* Determine the chip type. */
|
|
if (kind <= 0) {
|
|
i = lm78_read_value(new_client, LM78_REG_CHIPID);
|
|
if (i == 0x00 || i == 0x20 /* LM78 */
|
|
|| i == 0x40) /* LM78-J */
|
|
kind = lm78;
|
|
else if ((i & 0xfe) == 0xc0)
|
|
kind = lm79;
|
|
else {
|
|
if (kind == 0)
|
|
dev_warn(&adapter->dev, "Ignoring 'force' "
|
|
"parameter for unknown chip at "
|
|
"adapter %d, address 0x%02x\n",
|
|
i2c_adapter_id(adapter), address);
|
|
err = -ENODEV;
|
|
goto ERROR2;
|
|
}
|
|
}
|
|
|
|
if (kind == lm78) {
|
|
client_name = "lm78";
|
|
} else if (kind == lm79) {
|
|
client_name = "lm79";
|
|
}
|
|
|
|
/* Fill in the remaining client fields and put into the global list */
|
|
strlcpy(new_client->name, client_name, I2C_NAME_SIZE);
|
|
data->type = kind;
|
|
|
|
data->valid = 0;
|
|
mutex_init(&data->update_lock);
|
|
|
|
/* Tell the I2C layer a new client has arrived */
|
|
if ((err = i2c_attach_client(new_client)))
|
|
goto ERROR2;
|
|
|
|
/* Initialize the LM78 chip */
|
|
lm78_init_client(new_client);
|
|
|
|
/* A few vars need to be filled upon startup */
|
|
for (i = 0; i < 3; i++) {
|
|
data->fan_min[i] = lm78_read_value(new_client,
|
|
LM78_REG_FAN_MIN(i));
|
|
}
|
|
|
|
/* 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 ERROR3;
|
|
}
|
|
|
|
device_create_file(&new_client->dev, &dev_attr_in0_input);
|
|
device_create_file(&new_client->dev, &dev_attr_in0_min);
|
|
device_create_file(&new_client->dev, &dev_attr_in0_max);
|
|
device_create_file(&new_client->dev, &dev_attr_in1_input);
|
|
device_create_file(&new_client->dev, &dev_attr_in1_min);
|
|
device_create_file(&new_client->dev, &dev_attr_in1_max);
|
|
device_create_file(&new_client->dev, &dev_attr_in2_input);
|
|
device_create_file(&new_client->dev, &dev_attr_in2_min);
|
|
device_create_file(&new_client->dev, &dev_attr_in2_max);
|
|
device_create_file(&new_client->dev, &dev_attr_in3_input);
|
|
device_create_file(&new_client->dev, &dev_attr_in3_min);
|
|
device_create_file(&new_client->dev, &dev_attr_in3_max);
|
|
device_create_file(&new_client->dev, &dev_attr_in4_input);
|
|
device_create_file(&new_client->dev, &dev_attr_in4_min);
|
|
device_create_file(&new_client->dev, &dev_attr_in4_max);
|
|
device_create_file(&new_client->dev, &dev_attr_in5_input);
|
|
device_create_file(&new_client->dev, &dev_attr_in5_min);
|
|
device_create_file(&new_client->dev, &dev_attr_in5_max);
|
|
device_create_file(&new_client->dev, &dev_attr_in6_input);
|
|
device_create_file(&new_client->dev, &dev_attr_in6_min);
|
|
device_create_file(&new_client->dev, &dev_attr_in6_max);
|
|
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_fan1_input);
|
|
device_create_file(&new_client->dev, &dev_attr_fan1_min);
|
|
device_create_file(&new_client->dev, &dev_attr_fan1_div);
|
|
device_create_file(&new_client->dev, &dev_attr_fan2_input);
|
|
device_create_file(&new_client->dev, &dev_attr_fan2_min);
|
|
device_create_file(&new_client->dev, &dev_attr_fan2_div);
|
|
device_create_file(&new_client->dev, &dev_attr_fan3_input);
|
|
device_create_file(&new_client->dev, &dev_attr_fan3_min);
|
|
device_create_file(&new_client->dev, &dev_attr_fan3_div);
|
|
device_create_file(&new_client->dev, &dev_attr_alarms);
|
|
device_create_file(&new_client->dev, &dev_attr_cpu0_vid);
|
|
|
|
return 0;
|
|
|
|
ERROR3:
|
|
i2c_detach_client(new_client);
|
|
ERROR2:
|
|
kfree(data);
|
|
ERROR1:
|
|
if (is_isa)
|
|
release_region(address, LM78_EXTENT);
|
|
ERROR0:
|
|
return err;
|
|
}
|
|
|
|
static int lm78_detach_client(struct i2c_client *client)
|
|
{
|
|
struct lm78_data *data = i2c_get_clientdata(client);
|
|
int err;
|
|
|
|
hwmon_device_unregister(data->class_dev);
|
|
|
|
if ((err = i2c_detach_client(client)))
|
|
return err;
|
|
|
|
if(i2c_is_isa_client(client))
|
|
release_region(client->addr, LM78_EXTENT);
|
|
|
|
kfree(data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* The SMBus locks itself, but ISA access must be locked explicitly!
|
|
We don't want to lock the whole ISA bus, so we lock each client
|
|
separately.
|
|
We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks,
|
|
would slow down the LM78 access and should not be necessary. */
|
|
static int lm78_read_value(struct i2c_client *client, u8 reg)
|
|
{
|
|
int res;
|
|
if (i2c_is_isa_client(client)) {
|
|
struct lm78_data *data = i2c_get_clientdata(client);
|
|
mutex_lock(&data->lock);
|
|
outb_p(reg, client->addr + LM78_ADDR_REG_OFFSET);
|
|
res = inb_p(client->addr + LM78_DATA_REG_OFFSET);
|
|
mutex_unlock(&data->lock);
|
|
return res;
|
|
} else
|
|
return i2c_smbus_read_byte_data(client, reg);
|
|
}
|
|
|
|
/* The SMBus locks itself, but ISA access muse be locked explicitly!
|
|
We don't want to lock the whole ISA bus, so we lock each client
|
|
separately.
|
|
We ignore the LM78 BUSY flag at this moment - it could lead to deadlocks,
|
|
would slow down the LM78 access and should not be necessary.
|
|
There are some ugly typecasts here, but the good new is - they should
|
|
nowhere else be necessary! */
|
|
static int lm78_write_value(struct i2c_client *client, u8 reg, u8 value)
|
|
{
|
|
if (i2c_is_isa_client(client)) {
|
|
struct lm78_data *data = i2c_get_clientdata(client);
|
|
mutex_lock(&data->lock);
|
|
outb_p(reg, client->addr + LM78_ADDR_REG_OFFSET);
|
|
outb_p(value, client->addr + LM78_DATA_REG_OFFSET);
|
|
mutex_unlock(&data->lock);
|
|
return 0;
|
|
} else
|
|
return i2c_smbus_write_byte_data(client, reg, value);
|
|
}
|
|
|
|
static void lm78_init_client(struct i2c_client *client)
|
|
{
|
|
u8 config = lm78_read_value(client, LM78_REG_CONFIG);
|
|
|
|
/* Start monitoring */
|
|
if (!(config & 0x01))
|
|
lm78_write_value(client, LM78_REG_CONFIG,
|
|
(config & 0xf7) | 0x01);
|
|
}
|
|
|
|
static struct lm78_data *lm78_update_device(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct lm78_data *data = i2c_get_clientdata(client);
|
|
int i;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
|
|
|| !data->valid) {
|
|
|
|
dev_dbg(&client->dev, "Starting lm78 update\n");
|
|
|
|
for (i = 0; i <= 6; i++) {
|
|
data->in[i] =
|
|
lm78_read_value(client, LM78_REG_IN(i));
|
|
data->in_min[i] =
|
|
lm78_read_value(client, LM78_REG_IN_MIN(i));
|
|
data->in_max[i] =
|
|
lm78_read_value(client, LM78_REG_IN_MAX(i));
|
|
}
|
|
for (i = 0; i < 3; i++) {
|
|
data->fan[i] =
|
|
lm78_read_value(client, LM78_REG_FAN(i));
|
|
data->fan_min[i] =
|
|
lm78_read_value(client, LM78_REG_FAN_MIN(i));
|
|
}
|
|
data->temp = lm78_read_value(client, LM78_REG_TEMP);
|
|
data->temp_over =
|
|
lm78_read_value(client, LM78_REG_TEMP_OVER);
|
|
data->temp_hyst =
|
|
lm78_read_value(client, LM78_REG_TEMP_HYST);
|
|
i = lm78_read_value(client, LM78_REG_VID_FANDIV);
|
|
data->vid = i & 0x0f;
|
|
if (data->type == lm79)
|
|
data->vid |=
|
|
(lm78_read_value(client, LM78_REG_CHIPID) &
|
|
0x01) << 4;
|
|
else
|
|
data->vid |= 0x10;
|
|
data->fan_div[0] = (i >> 4) & 0x03;
|
|
data->fan_div[1] = i >> 6;
|
|
data->alarms = lm78_read_value(client, LM78_REG_ALARM1) +
|
|
(lm78_read_value(client, LM78_REG_ALARM2) << 8);
|
|
data->last_updated = jiffies;
|
|
data->valid = 1;
|
|
|
|
data->fan_div[2] = 1;
|
|
}
|
|
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return data;
|
|
}
|
|
|
|
static int __init sm_lm78_init(void)
|
|
{
|
|
int res;
|
|
|
|
res = i2c_add_driver(&lm78_driver);
|
|
if (res)
|
|
return res;
|
|
|
|
res = i2c_isa_add_driver(&lm78_isa_driver);
|
|
if (res) {
|
|
i2c_del_driver(&lm78_driver);
|
|
return res;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit sm_lm78_exit(void)
|
|
{
|
|
i2c_isa_del_driver(&lm78_isa_driver);
|
|
i2c_del_driver(&lm78_driver);
|
|
}
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>");
|
|
MODULE_DESCRIPTION("LM78/LM79 driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(sm_lm78_init);
|
|
module_exit(sm_lm78_exit);
|