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lm-sensors/kernel/chips/adm1021.c
T
Jean Delvare 239b3d0344 Backport memory allocation reworking from Linux 2.6. 
git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@2445 7894878c-1315-0410-8ee3-d5d059ff63e0
2004-04-17 17:20:01 +00:00

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/*
adm1021.c - Part of lm_sensors, Linux kernel modules for hardware
monitoring
Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
Philip Edelbrock <phil@netroedge.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/i2c-proc.h>
#include <linux/init.h>
#include "version.h"
/* Addresses to scan */
static unsigned short normal_i2c[] = { SENSORS_I2C_END };
static unsigned short normal_i2c_range[] = { 0x18, 0x1a, 0x29, 0x2b,
0x4c, 0x4e, SENSORS_I2C_END
};
static unsigned int normal_isa[] = { SENSORS_ISA_END };
static unsigned int normal_isa_range[] = { SENSORS_ISA_END };
/* Insmod parameters */
SENSORS_INSMOD_8(adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm, mc1066);
/* adm1021 constants specified below */
/* The adm1021 registers */
/* Read-only */
#define ADM1021_REG_TEMP 0x00
#define ADM1021_REG_REMOTE_TEMP 0x01
#define ADM1021_REG_STATUS 0x02
#define ADM1021_REG_MAN_ID 0x0FE /* 0x41 = Analog Devices, 0x49 = TI,
0x4D = Maxim, 0x23 = Genesys , 0x54 = Onsemi*/
#define ADM1021_REG_DEV_ID 0x0FF /* ADM1021 = 0x0X, ADM1021A/ADM1023 = 0x3X */
#define ADM1021_REG_DIE_CODE 0x0FF /* MAX1617A */
/* These use different addresses for reading/writing */
#define ADM1021_REG_CONFIG_R 0x03
#define ADM1021_REG_CONFIG_W 0x09
#define ADM1021_REG_CONV_RATE_R 0x04
#define ADM1021_REG_CONV_RATE_W 0x0A
/* These are for the ADM1023's additional precision on the remote temp sensor */
#define ADM1021_REG_REM_TEMP_PREC 0x010
#define ADM1021_REG_REM_OFFSET 0x011
#define ADM1021_REG_REM_OFFSET_PREC 0x012
#define ADM1021_REG_REM_TOS_PREC 0x013
#define ADM1021_REG_REM_THYST_PREC 0x014
/* limits */
#define ADM1021_REG_TOS_R 0x05
#define ADM1021_REG_TOS_W 0x0B
#define ADM1021_REG_REMOTE_TOS_R 0x07
#define ADM1021_REG_REMOTE_TOS_W 0x0D
#define ADM1021_REG_THYST_R 0x06
#define ADM1021_REG_THYST_W 0x0C
#define ADM1021_REG_REMOTE_THYST_R 0x08
#define ADM1021_REG_REMOTE_THYST_W 0x0E
/* write-only */
#define ADM1021_REG_ONESHOT 0x0F
#define ADM1021_ALARM_TEMP (ADM1021_ALARM_TEMP_HIGH | ADM1021_ALARM_TEMP_LOW)
#define ADM1021_ALARM_RTEMP (ADM1021_ALARM_RTEMP_HIGH | ADM1021_ALARM_RTEMP_LOW\
| ADM1021_ALARM_RTEMP_NA)
#define ADM1021_ALARM_ALL (ADM1021_ALARM_TEMP | ADM1021_ALARM_RTEMP)
/* 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. */
/* Conversions note: 1021 uses normal integer signed-byte format*/
#define TEMP_FROM_REG(val) (val > 127 ? val-256 : val)
#define TEMP_TO_REG(val) (SENSORS_LIMIT((val < 0 ? val+256 : val),0,255))
/* Each client has this additional data */
struct adm1021_data {
struct i2c_client client;
int sysctl_id;
enum chips type;
struct semaphore update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
u8 temp, temp_os, temp_hyst; /* Register values */
u8 remote_temp, remote_temp_os, remote_temp_hyst, alarms, die_code;
u8 fail;
/* Special values for ADM1023 only */
u8 remote_temp_prec, remote_temp_os_prec, remote_temp_hyst_prec,
remote_temp_offset, remote_temp_offset_prec;
};
static int adm1021_attach_adapter(struct i2c_adapter *adapter);
static int adm1021_detect(struct i2c_adapter *adapter, int address,
unsigned short flags, int kind);
static void adm1021_init_client(struct i2c_client *client);
static int adm1021_detach_client(struct i2c_client *client);
static int adm1021_read_value(struct i2c_client *client, u8 reg);
static int adm1021_rd_good(u8 *val, struct i2c_client *client, u8 reg, u8 mask);
static int adm1021_write_value(struct i2c_client *client, u8 reg,
u16 value);
static void adm1021_temp(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results);
static void adm1021_remote_temp(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag,
long *results);
static void adm1021_alarms(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results);
static void adm1021_die_code(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results);
static void adm1021_update_client(struct i2c_client *client);
/* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */
static int read_only = 0;
/* This is the driver that will be inserted */
static struct i2c_driver adm1021_driver = {
.owner = THIS_MODULE,
.name = "ADM1021, MAX1617 sensor driver",
.id = I2C_DRIVERID_ADM1021,
.flags = I2C_DF_NOTIFY,
.attach_adapter = adm1021_attach_adapter,
.detach_client = adm1021_detach_client,
};
/* -- SENSORS SYSCTL START -- */
#define ADM1021_SYSCTL_TEMP 1200
#define ADM1021_SYSCTL_REMOTE_TEMP 1201
#define ADM1021_SYSCTL_DIE_CODE 1202
#define ADM1021_SYSCTL_ALARMS 1203
#define ADM1021_ALARM_TEMP_HIGH 0x40
#define ADM1021_ALARM_TEMP_LOW 0x20
#define ADM1021_ALARM_RTEMP_HIGH 0x10
#define ADM1021_ALARM_RTEMP_LOW 0x08
#define ADM1021_ALARM_RTEMP_NA 0x04
/* -- SENSORS SYSCTL END -- */
/* These files are created for each detected adm1021. This is just a template;
though at first sight, you might think we could use a statically
allocated list, we need some way to get back to the parent - which
is done through one of the 'extra' fields which are initialized
when a new copy is allocated. */
static ctl_table adm1021_dir_table_template[] = {
{ADM1021_SYSCTL_TEMP, "temp1", NULL, 0, 0644, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1021_temp},
{ADM1021_SYSCTL_REMOTE_TEMP, "temp2", NULL, 0, 0644, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1021_remote_temp},
{ADM1021_SYSCTL_DIE_CODE, "die_code", NULL, 0, 0444, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1021_die_code},
{ADM1021_SYSCTL_ALARMS, "alarms", NULL, 0, 0444, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1021_alarms},
{0}
};
static ctl_table adm1021_max_dir_table_template[] = {
{ADM1021_SYSCTL_TEMP, "temp1", NULL, 0, 0644, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1021_temp},
{ADM1021_SYSCTL_REMOTE_TEMP, "temp2", NULL, 0, 0644, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1021_remote_temp},
{ADM1021_SYSCTL_ALARMS, "alarms", NULL, 0, 0444, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1021_alarms},
{0}
};
static int adm1021_id = 0;
static int adm1021_attach_adapter(struct i2c_adapter *adapter)
{
return i2c_detect(adapter, &addr_data, adm1021_detect);
}
static int adm1021_detect(struct i2c_adapter *adapter, int address,
unsigned short flags, int kind)
{
int i;
struct i2c_client *new_client;
struct adm1021_data *data;
int err = 0;
const char *type_name = "";
const char *client_name = "";
/* Make sure we aren't probing the ISA bus!! This is just a safety check
at this moment; i2c_detect really won't call us. */
#ifdef DEBUG
if (i2c_is_isa_adapter(adapter)) {
printk
("adm1021.o: adm1021_detect called for an ISA bus adapter?!?\n");
return 0;
}
#endif
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
goto error0;
/* 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 adm1021_{read,write}_value. */
if (!(data = kmalloc(sizeof(struct adm1021_data), GFP_KERNEL))) {
err = -ENOMEM;
goto error0;
}
new_client = &data->client;
new_client->addr = address;
new_client->data = data;
new_client->adapter = adapter;
new_client->driver = &adm1021_driver;
new_client->flags = 0;
/* Now, we do the remaining detection. */
if (kind < 0) {
if ((adm1021_read_value(new_client, ADM1021_REG_STATUS) & 0x03) != 0x00
|| (adm1021_read_value(new_client, ADM1021_REG_CONFIG_R) & 0x3F) != 0x00
|| (adm1021_read_value(new_client, ADM1021_REG_CONV_RATE_R) & 0xF8) != 0x00) {
err = -ENODEV;
goto error1;
}
}
/* Determine the chip type. */
if (kind <= 0) {
i = adm1021_read_value(new_client, ADM1021_REG_MAN_ID);
if (i == 0x41)
if ((adm1021_read_value (new_client, ADM1021_REG_DEV_ID) & 0xF0) == 0x30)
kind = adm1023;
else
kind = adm1021;
else if (i == 0x49)
kind = thmc10;
else if (i == 0x23)
kind = gl523sm;
else if ((i == 0x4d) &&
(adm1021_read_value
(new_client, ADM1021_REG_DEV_ID) == 0x01))
kind = max1617a;
else if (i == 0x54)
kind = mc1066;
/* LM84 Mfr ID in a different place, and it has more unused bits */
else if (adm1021_read_value(new_client, ADM1021_REG_CONV_RATE_R) == 0x00
&& (kind == 0 /* skip extra detection */
|| ((adm1021_read_value(new_client, ADM1021_REG_CONFIG_R) & 0x7F) == 0x00
&& (adm1021_read_value(new_client, ADM1021_REG_STATUS) & 0xAB) == 0x00)))
kind = lm84;
else
kind = max1617;
}
if (kind == max1617) {
type_name = "max1617";
client_name = "MAX1617 chip";
} else if (kind == max1617a) {
type_name = "max1617a";
client_name = "MAX1617A chip";
} else if (kind == adm1021) {
type_name = "adm1021";
client_name = "ADM1021 chip";
} else if (kind == adm1023) {
type_name = "adm1023";
client_name = "ADM1023 chip";
} else if (kind == thmc10) {
type_name = "thmc10";
client_name = "THMC10 chip";
} else if (kind == lm84) {
type_name = "lm84";
client_name = "LM84 chip";
} else if (kind == gl523sm) {
type_name = "gl523sm";
client_name = "GL523SM chip";
} else if (kind == mc1066) {
type_name = "mc1066";
client_name = "MC1066 chip";
}
/* Fill in the remaining client fields and put it into the global list */
strcpy(new_client->name, client_name);
data->type = kind;
new_client->id = adm1021_id++;
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 error3;
/* Register a new directory entry with module sensors */
if ((i = i2c_register_entry(new_client, type_name,
data->type == adm1021 ? adm1021_dir_table_template :
adm1021_max_dir_table_template)) < 0) {
err = i;
goto error4;
}
data->sysctl_id = i;
/* Initialize the ADM1021 chip */
if (kind != lm84)
adm1021_init_client(new_client);
return 0;
error4:
i2c_detach_client(new_client);
error3:
error1:
kfree(data);
error0:
return err;
}
static void adm1021_init_client(struct i2c_client *client)
{
/* Enable ADC and disable suspend mode */
adm1021_write_value(client, ADM1021_REG_CONFIG_W,
adm1021_read_value(client, ADM1021_REG_CONFIG_R) & 0xBF);
/* Set Conversion rate to 1/sec (this can be tinkered with) */
adm1021_write_value(client, ADM1021_REG_CONV_RATE_W, 0x04);
}
static int adm1021_detach_client(struct i2c_client *client)
{
int err;
i2c_deregister_entry(((struct adm1021_data *) (client->data))->
sysctl_id);
if ((err = i2c_detach_client(client))) {
printk
("adm1021.o: Client deregistration failed, client not detached.\n");
return err;
}
kfree(client->data);
return 0;
}
/* All registers are byte-sized */
static int adm1021_read_value(struct i2c_client *client, u8 reg)
{
return i2c_smbus_read_byte_data(client, reg);
}
/* only update value if read succeeded; set fail bit if failed */
static int adm1021_rd_good(u8 *val, struct i2c_client *client, u8 reg, u8 mask)
{
int i;
struct adm1021_data *data = client->data;
i = i2c_smbus_read_byte_data(client, reg);
if (i < 0) {
data->fail |= mask;
return i;
}
*val = i;
return 0;
}
static int adm1021_write_value(struct i2c_client *client, u8 reg, u16 value)
{
if (read_only > 0)
return 0;
return i2c_smbus_write_byte_data(client, reg, value);
}
static void adm1021_update_client(struct i2c_client *client)
{
struct adm1021_data *data = client->data;
down(&data->update_lock);
if ((jiffies - data->last_updated > HZ + HZ / 2) ||
(jiffies < data->last_updated) || !data->valid) {
#ifdef DEBUG
printk("Starting adm1021 update\n");
#endif
data->fail = 0;
adm1021_rd_good(&(data->temp), client, ADM1021_REG_TEMP,
ADM1021_ALARM_TEMP);
adm1021_rd_good(&(data->temp_os), client, ADM1021_REG_TOS_R,
ADM1021_ALARM_TEMP);
adm1021_rd_good(&(data->temp_hyst), client,
ADM1021_REG_THYST_R, ADM1021_ALARM_TEMP);
adm1021_rd_good(&(data->remote_temp), client,
ADM1021_REG_REMOTE_TEMP, ADM1021_ALARM_RTEMP);
adm1021_rd_good(&(data->remote_temp_os), client,
ADM1021_REG_REMOTE_TOS_R, ADM1021_ALARM_RTEMP);
adm1021_rd_good(&(data->remote_temp_hyst), client,
ADM1021_REG_REMOTE_THYST_R,
ADM1021_ALARM_RTEMP);
data->alarms = ADM1021_ALARM_ALL;
if (!adm1021_rd_good(&(data->alarms), client,
ADM1021_REG_STATUS, 0))
data->alarms &= ADM1021_ALARM_ALL;
if (data->type == adm1021)
adm1021_rd_good(&(data->die_code), client,
ADM1021_REG_DIE_CODE, 0);
if (data->type == adm1023) {
adm1021_rd_good(&(data->remote_temp_prec), client,
ADM1021_REG_REM_TEMP_PREC,
ADM1021_ALARM_TEMP);
adm1021_rd_good(&(data->remote_temp_os_prec), client,
ADM1021_REG_REM_TOS_PREC,
ADM1021_ALARM_RTEMP);
adm1021_rd_good(&(data->remote_temp_hyst_prec), client,
ADM1021_REG_REM_THYST_PREC,
ADM1021_ALARM_RTEMP);
adm1021_rd_good(&(data->remote_temp_offset), client,
ADM1021_REG_REM_OFFSET,
ADM1021_ALARM_RTEMP);
adm1021_rd_good(&(data->remote_temp_offset_prec),
client, ADM1021_REG_REM_OFFSET_PREC,
ADM1021_ALARM_RTEMP);
}
data->last_updated = jiffies;
data->valid = 1;
}
up(&data->update_lock);
}
void adm1021_temp(struct i2c_client *client, int operation, int ctl_name,
int *nrels_mag, long *results)
{
struct adm1021_data *data = client->data;
if (operation == SENSORS_PROC_REAL_INFO)
*nrels_mag = 0;
else if (operation == SENSORS_PROC_REAL_READ) {
adm1021_update_client(client);
results[0] = TEMP_FROM_REG(data->temp_os);
results[1] = TEMP_FROM_REG(data->temp_hyst);
results[2] = TEMP_FROM_REG(data->temp);
*nrels_mag = 3;
} else if (operation == SENSORS_PROC_REAL_WRITE) {
if (*nrels_mag >= 1) {
data->temp_os = TEMP_TO_REG(results[0]);
adm1021_write_value(client, ADM1021_REG_TOS_W,
data->temp_os);
}
if (*nrels_mag >= 2) {
data->temp_hyst = TEMP_TO_REG(results[1]);
adm1021_write_value(client, ADM1021_REG_THYST_W,
data->temp_hyst);
}
}
}
void adm1021_remote_temp(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results)
{
struct adm1021_data *data = client->data;
int prec = 0;
if (operation == SENSORS_PROC_REAL_INFO)
if (data->type == adm1023) { *nrels_mag = 3; }
else { *nrels_mag = 0; }
else if (operation == SENSORS_PROC_REAL_READ) {
adm1021_update_client(client);
results[0] = TEMP_FROM_REG(data->remote_temp_os);
results[1] = TEMP_FROM_REG(data->remote_temp_hyst);
results[2] = TEMP_FROM_REG(data->remote_temp);
if (data->type == adm1023) {
results[0]=results[0]*1000 +
((data->remote_temp_os_prec >> 5) * 125);
results[1]=results[1]*1000 +
((data->remote_temp_hyst_prec >> 5) * 125);
results[2]=(TEMP_FROM_REG(data->remote_temp_offset)*1000) +
((data->remote_temp_offset_prec >> 5) * 125);
results[3]=TEMP_FROM_REG(data->remote_temp)*1000 +
((data->remote_temp_prec >> 5) * 125);
*nrels_mag = 4;
} else {
*nrels_mag = 3;
}
} else if (operation == SENSORS_PROC_REAL_WRITE) {
if (*nrels_mag >= 1) {
if (data->type == adm1023) {
prec=((results[0]-((results[0]/1000)*1000))/125)<<5;
adm1021_write_value(client,
ADM1021_REG_REM_TOS_PREC,
prec);
results[0]=results[0]/1000;
data->remote_temp_os_prec=prec;
}
data->remote_temp_os = TEMP_TO_REG(results[0]);
adm1021_write_value(client,
ADM1021_REG_REMOTE_TOS_W,
data->remote_temp_os);
}
if (*nrels_mag >= 2) {
if (data->type == adm1023) {
prec=((results[1]-((results[1]/1000)*1000))/125)<<5;
adm1021_write_value(client,
ADM1021_REG_REM_THYST_PREC,
prec);
results[1]=results[1]/1000;
data->remote_temp_hyst_prec=prec;
}
data->remote_temp_hyst = TEMP_TO_REG(results[1]);
adm1021_write_value(client,
ADM1021_REG_REMOTE_THYST_W,
data->remote_temp_hyst);
}
if (*nrels_mag >= 3) {
if (data->type == adm1023) {
prec=((results[2]-((results[2]/1000)*1000))/125)<<5;
adm1021_write_value(client,
ADM1021_REG_REM_OFFSET_PREC,
prec);
results[2]=results[2]/1000;
data->remote_temp_offset_prec=prec;
data->remote_temp_offset=results[2];
adm1021_write_value(client,
ADM1021_REG_REM_OFFSET,
data->remote_temp_offset);
}
}
}
}
void adm1021_die_code(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results)
{
struct adm1021_data *data = client->data;
if (operation == SENSORS_PROC_REAL_INFO)
*nrels_mag = 0;
else if (operation == SENSORS_PROC_REAL_READ) {
adm1021_update_client(client);
results[0] = data->die_code;
*nrels_mag = 1;
} else if (operation == SENSORS_PROC_REAL_WRITE) {
/* Can't write to it */
}
}
void adm1021_alarms(struct i2c_client *client, int operation, int ctl_name,
int *nrels_mag, long *results)
{
struct adm1021_data *data = client->data;
if (operation == SENSORS_PROC_REAL_INFO)
*nrels_mag = 0;
else if (operation == SENSORS_PROC_REAL_READ) {
adm1021_update_client(client);
results[0] = data->alarms | data->fail;
*nrels_mag = 1;
} else if (operation == SENSORS_PROC_REAL_WRITE) {
/* Can't write to it */
}
}
static int __init sm_adm1021_init(void)
{
printk(KERN_INFO "adm1021.o version %s (%s)\n", LM_VERSION, LM_DATE);
return i2c_add_driver(&adm1021_driver);
}
static void __exit sm_adm1021_exit(void)
{
i2c_del_driver(&adm1021_driver);
}
MODULE_AUTHOR
("Frodo Looijaard <frodol@dds.nl> and Philip Edelbrock <phil@netroedge.com>");
MODULE_DESCRIPTION("adm1021 driver");
MODULE_LICENSE("GPL");
MODULE_PARM(read_only, "i");
MODULE_PARM_DESC(read_only, "Don't set any values, read only mode");
module_init(sm_adm1021_init)
module_exit(sm_adm1021_exit)
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