![Greg Kroah-Hartman](/assets/img/avatar_default.png)
Now that i2c_add_driver() doesn't need the module owner to be set by hand, we can delete it from the drivers. This patch catches all of the drivers that I found in the current tree (if a driver sets the .owner by hand, it's not a problem, just not needed.) Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Cc: Jean Delvare <khali@linux-fr.org>
403 lines
13 KiB
C
403 lines
13 KiB
C
/*
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adm1021.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> and
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Philip Edelbrock <phil@netroedge.com>
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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/hwmon.h>
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#include <linux/err.h>
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/* Addresses to scan */
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static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a,
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0x29, 0x2a, 0x2b,
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0x4c, 0x4d, 0x4e,
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I2C_CLIENT_END };
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/* Insmod parameters */
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I2C_CLIENT_INSMOD_8(adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm, mc1066);
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/* adm1021 constants specified below */
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/* The adm1021 registers */
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/* Read-only */
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#define ADM1021_REG_TEMP 0x00
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#define ADM1021_REG_REMOTE_TEMP 0x01
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#define ADM1021_REG_STATUS 0x02
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#define ADM1021_REG_MAN_ID 0x0FE /* 0x41 = AMD, 0x49 = TI, 0x4D = Maxim, 0x23 = Genesys , 0x54 = Onsemi*/
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#define ADM1021_REG_DEV_ID 0x0FF /* ADM1021 = 0x0X, ADM1023 = 0x3X */
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#define ADM1021_REG_DIE_CODE 0x0FF /* MAX1617A */
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/* These use different addresses for reading/writing */
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#define ADM1021_REG_CONFIG_R 0x03
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#define ADM1021_REG_CONFIG_W 0x09
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#define ADM1021_REG_CONV_RATE_R 0x04
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#define ADM1021_REG_CONV_RATE_W 0x0A
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/* These are for the ADM1023's additional precision on the remote temp sensor */
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#define ADM1021_REG_REM_TEMP_PREC 0x010
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#define ADM1021_REG_REM_OFFSET 0x011
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#define ADM1021_REG_REM_OFFSET_PREC 0x012
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#define ADM1021_REG_REM_TOS_PREC 0x013
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#define ADM1021_REG_REM_THYST_PREC 0x014
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/* limits */
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#define ADM1021_REG_TOS_R 0x05
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#define ADM1021_REG_TOS_W 0x0B
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#define ADM1021_REG_REMOTE_TOS_R 0x07
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#define ADM1021_REG_REMOTE_TOS_W 0x0D
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#define ADM1021_REG_THYST_R 0x06
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#define ADM1021_REG_THYST_W 0x0C
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#define ADM1021_REG_REMOTE_THYST_R 0x08
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#define ADM1021_REG_REMOTE_THYST_W 0x0E
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/* write-only */
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#define ADM1021_REG_ONESHOT 0x0F
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/* Conversions. Rounding and limit checking is only done on the TO_REG
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variants. Note that you should be a bit careful with which arguments
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these macros are called: arguments may be evaluated more than once.
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Fixing this is just not worth it. */
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/* Conversions note: 1021 uses normal integer signed-byte format*/
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#define TEMP_FROM_REG(val) (val > 127 ? (val-256)*1000 : val*1000)
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#define TEMP_TO_REG(val) (SENSORS_LIMIT((val < 0 ? (val/1000)+256 : val/1000),0,255))
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/* Initial values */
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/* Note: Even though I left the low and high limits named os and hyst,
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they don't quite work like a thermostat the way the LM75 does. I.e.,
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a lower temp than THYST actually triggers an alarm instead of
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clearing it. Weird, ey? --Phil */
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/* Each client has this additional data */
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struct adm1021_data {
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struct i2c_client client;
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struct class_device *class_dev;
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enum chips type;
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struct semaphore 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 temp_max; /* Register values */
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u8 temp_hyst;
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u8 temp_input;
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u8 remote_temp_max;
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u8 remote_temp_hyst;
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u8 remote_temp_input;
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u8 alarms;
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/* Special values for ADM1023 only */
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u8 remote_temp_prec;
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u8 remote_temp_os_prec;
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u8 remote_temp_hyst_prec;
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u8 remote_temp_offset;
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u8 remote_temp_offset_prec;
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};
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static int adm1021_attach_adapter(struct i2c_adapter *adapter);
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static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind);
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static void adm1021_init_client(struct i2c_client *client);
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static int adm1021_detach_client(struct i2c_client *client);
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static int adm1021_read_value(struct i2c_client *client, u8 reg);
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static int adm1021_write_value(struct i2c_client *client, u8 reg,
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u16 value);
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static struct adm1021_data *adm1021_update_device(struct device *dev);
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/* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */
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static int read_only;
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/* This is the driver that will be inserted */
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static struct i2c_driver adm1021_driver = {
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.driver = {
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.name = "adm1021",
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},
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.id = I2C_DRIVERID_ADM1021,
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.attach_adapter = adm1021_attach_adapter,
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.detach_client = adm1021_detach_client,
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};
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#define show(value) \
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static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \
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{ \
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struct adm1021_data *data = adm1021_update_device(dev); \
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->value)); \
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}
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show(temp_max);
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show(temp_hyst);
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show(temp_input);
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show(remote_temp_max);
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show(remote_temp_hyst);
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show(remote_temp_input);
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#define show2(value) \
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static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \
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{ \
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struct adm1021_data *data = adm1021_update_device(dev); \
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return sprintf(buf, "%d\n", data->value); \
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}
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show2(alarms);
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#define set(value, reg) \
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static ssize_t set_##value(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 adm1021_data *data = i2c_get_clientdata(client); \
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int temp = simple_strtoul(buf, NULL, 10); \
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\
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down(&data->update_lock); \
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data->value = TEMP_TO_REG(temp); \
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adm1021_write_value(client, reg, data->value); \
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up(&data->update_lock); \
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return count; \
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}
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set(temp_max, ADM1021_REG_TOS_W);
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set(temp_hyst, ADM1021_REG_THYST_W);
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set(remote_temp_max, ADM1021_REG_REMOTE_TOS_W);
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set(remote_temp_hyst, ADM1021_REG_REMOTE_THYST_W);
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static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, set_temp_max);
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static DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_hyst, set_temp_hyst);
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static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL);
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static DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_remote_temp_max, set_remote_temp_max);
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static DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_remote_temp_hyst, set_remote_temp_hyst);
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static DEVICE_ATTR(temp2_input, S_IRUGO, show_remote_temp_input, NULL);
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static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
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static int adm1021_attach_adapter(struct i2c_adapter *adapter)
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{
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if (!(adapter->class & I2C_CLASS_HWMON))
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return 0;
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return i2c_probe(adapter, &addr_data, adm1021_detect);
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}
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static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind)
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{
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int i;
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struct i2c_client *new_client;
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struct adm1021_data *data;
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int err = 0;
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const char *type_name = "";
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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goto error0;
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/* OK. For now, we presume we have a valid client. We now create the
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client structure, even though we cannot fill it completely yet.
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But it allows us to access adm1021_{read,write}_value. */
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if (!(data = kzalloc(sizeof(struct adm1021_data), GFP_KERNEL))) {
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err = -ENOMEM;
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goto error0;
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}
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new_client = &data->client;
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i2c_set_clientdata(new_client, data);
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new_client->addr = address;
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new_client->adapter = adapter;
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new_client->driver = &adm1021_driver;
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new_client->flags = 0;
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/* Now, we do the remaining detection. */
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if (kind < 0) {
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if ((adm1021_read_value(new_client, ADM1021_REG_STATUS) & 0x03) != 0x00
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|| (adm1021_read_value(new_client, ADM1021_REG_CONFIG_R) & 0x3F) != 0x00
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|| (adm1021_read_value(new_client, ADM1021_REG_CONV_RATE_R) & 0xF8) != 0x00) {
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err = -ENODEV;
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goto error1;
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}
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}
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/* Determine the chip type. */
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if (kind <= 0) {
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i = adm1021_read_value(new_client, ADM1021_REG_MAN_ID);
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if (i == 0x41)
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if ((adm1021_read_value(new_client, ADM1021_REG_DEV_ID) & 0x0F0) == 0x030)
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kind = adm1023;
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else
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kind = adm1021;
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else if (i == 0x49)
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kind = thmc10;
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else if (i == 0x23)
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kind = gl523sm;
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else if ((i == 0x4d) &&
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(adm1021_read_value(new_client, ADM1021_REG_DEV_ID) == 0x01))
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kind = max1617a;
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else if (i == 0x54)
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kind = mc1066;
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/* LM84 Mfr ID in a different place, and it has more unused bits */
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else if (adm1021_read_value(new_client, ADM1021_REG_CONV_RATE_R) == 0x00
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&& (kind == 0 /* skip extra detection */
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|| ((adm1021_read_value(new_client, ADM1021_REG_CONFIG_R) & 0x7F) == 0x00
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&& (adm1021_read_value(new_client, ADM1021_REG_STATUS) & 0xAB) == 0x00)))
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kind = lm84;
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else
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kind = max1617;
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}
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if (kind == max1617) {
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type_name = "max1617";
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} else if (kind == max1617a) {
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type_name = "max1617a";
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} else if (kind == adm1021) {
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type_name = "adm1021";
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} else if (kind == adm1023) {
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type_name = "adm1023";
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} else if (kind == thmc10) {
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type_name = "thmc10";
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} else if (kind == lm84) {
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type_name = "lm84";
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} else if (kind == gl523sm) {
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type_name = "gl523sm";
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} else if (kind == mc1066) {
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type_name = "mc1066";
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}
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/* Fill in the remaining client fields and put it into the global list */
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strlcpy(new_client->name, type_name, I2C_NAME_SIZE);
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data->type = kind;
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data->valid = 0;
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init_MUTEX(&data->update_lock);
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/* Tell the I2C layer a new client has arrived */
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if ((err = i2c_attach_client(new_client)))
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goto error1;
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/* Initialize the ADM1021 chip */
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if (kind != lm84)
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adm1021_init_client(new_client);
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/* Register sysfs hooks */
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data->class_dev = hwmon_device_register(&new_client->dev);
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if (IS_ERR(data->class_dev)) {
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err = PTR_ERR(data->class_dev);
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goto error2;
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}
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device_create_file(&new_client->dev, &dev_attr_temp1_max);
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device_create_file(&new_client->dev, &dev_attr_temp1_min);
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device_create_file(&new_client->dev, &dev_attr_temp1_input);
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device_create_file(&new_client->dev, &dev_attr_temp2_max);
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device_create_file(&new_client->dev, &dev_attr_temp2_min);
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device_create_file(&new_client->dev, &dev_attr_temp2_input);
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device_create_file(&new_client->dev, &dev_attr_alarms);
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return 0;
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error2:
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i2c_detach_client(new_client);
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error1:
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kfree(data);
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error0:
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return err;
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}
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static void adm1021_init_client(struct i2c_client *client)
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{
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/* Enable ADC and disable suspend mode */
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adm1021_write_value(client, ADM1021_REG_CONFIG_W,
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adm1021_read_value(client, ADM1021_REG_CONFIG_R) & 0xBF);
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/* Set Conversion rate to 1/sec (this can be tinkered with) */
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adm1021_write_value(client, ADM1021_REG_CONV_RATE_W, 0x04);
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}
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static int adm1021_detach_client(struct i2c_client *client)
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{
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struct adm1021_data *data = i2c_get_clientdata(client);
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int err;
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hwmon_device_unregister(data->class_dev);
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if ((err = i2c_detach_client(client)))
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return err;
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kfree(data);
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return 0;
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}
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/* All registers are byte-sized */
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static int adm1021_read_value(struct i2c_client *client, u8 reg)
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{
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return i2c_smbus_read_byte_data(client, reg);
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}
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static int adm1021_write_value(struct i2c_client *client, u8 reg, u16 value)
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{
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if (!read_only)
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return i2c_smbus_write_byte_data(client, reg, value);
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return 0;
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}
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static struct adm1021_data *adm1021_update_device(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct adm1021_data *data = i2c_get_clientdata(client);
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down(&data->update_lock);
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if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
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|| !data->valid) {
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dev_dbg(&client->dev, "Starting adm1021 update\n");
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data->temp_input = adm1021_read_value(client, ADM1021_REG_TEMP);
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data->temp_max = adm1021_read_value(client, ADM1021_REG_TOS_R);
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data->temp_hyst = adm1021_read_value(client, ADM1021_REG_THYST_R);
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data->remote_temp_input = adm1021_read_value(client, ADM1021_REG_REMOTE_TEMP);
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data->remote_temp_max = adm1021_read_value(client, ADM1021_REG_REMOTE_TOS_R);
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data->remote_temp_hyst = adm1021_read_value(client, ADM1021_REG_REMOTE_THYST_R);
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data->alarms = adm1021_read_value(client, ADM1021_REG_STATUS) & 0x7c;
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if (data->type == adm1023) {
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data->remote_temp_prec = adm1021_read_value(client, ADM1021_REG_REM_TEMP_PREC);
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data->remote_temp_os_prec = adm1021_read_value(client, ADM1021_REG_REM_TOS_PREC);
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data->remote_temp_hyst_prec = adm1021_read_value(client, ADM1021_REG_REM_THYST_PREC);
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data->remote_temp_offset = adm1021_read_value(client, ADM1021_REG_REM_OFFSET);
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data->remote_temp_offset_prec = adm1021_read_value(client, ADM1021_REG_REM_OFFSET_PREC);
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}
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data->last_updated = jiffies;
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data->valid = 1;
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}
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up(&data->update_lock);
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return data;
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}
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static int __init sensors_adm1021_init(void)
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{
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return i2c_add_driver(&adm1021_driver);
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}
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static void __exit sensors_adm1021_exit(void)
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{
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i2c_del_driver(&adm1021_driver);
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}
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MODULE_AUTHOR ("Frodo Looijaard <frodol@dds.nl> and "
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"Philip Edelbrock <phil@netroedge.com>");
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MODULE_DESCRIPTION("adm1021 driver");
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MODULE_LICENSE("GPL");
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module_param(read_only, bool, 0);
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MODULE_PARM_DESC(read_only, "Don't set any values, read only mode");
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module_init(sensors_adm1021_init)
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module_exit(sensors_adm1021_exit)
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