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lm-sensors/kernel/chips/adm1025.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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/*
adm1025.c - Part of lm_sensors, Linux kernel modules for hardware
monitoring
Copyright (c) 2000 Chen-Yuan Wu <gwu@esoft.com>
Copyright (c) 2003-2004 Jean Delvare <khali@linux-fr.org>
Based on the adm9240 driver.
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.
*/
/* Supports the Analog Devices ADM1025 and the Philips NE1619.
See doc/chips/adm1025 for details */
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/i2c-proc.h>
#include <linux/init.h>
#include "version.h"
#include "sensors_vid.h"
MODULE_LICENSE("GPL");
/* Addresses to scan */
static unsigned short normal_i2c[] = { SENSORS_I2C_END };
static unsigned short normal_i2c_range[] = { 0x2c, 0x2e, SENSORS_I2C_END };
static unsigned int normal_isa[] = { SENSORS_ISA_END };
static unsigned int normal_isa_range[] = { SENSORS_ISA_END };
/* Insmod parameters */
SENSORS_INSMOD_2(adm1025, ne1619);
/* Many ADM1025 constants specified below */
/* The ADM1025 registers */
/* These are all read-only */
#define ADM1025_REG_2_5V 0x20 /* not used directly, see */
#define ADM1025_REG_VCCP1 0x21 /* ADM1025_REG_IN(nr) below */
#define ADM1025_REG_3_3V 0x22
#define ADM1025_REG_5V 0x23
#define ADM1025_REG_12V 0x24
#define ADM1025_REG_VCC 0x25
#define ADM1025_REG_RTEMP 0x26 /* not used directly, see */
#define ADM1025_REG_LTEMP 0x27 /* ADM1025_REG_TEMP(nr) below */
#define ADM1025_REG_COMPANY_ID 0x3E /* 0x41 for Analog Devices,
0xA1 for Philips */
#define ADM1025_REG_DIE_REV 0x3F /* 0x20-0x2F for ADM1025 and compatible */
#define ADM1025_REG_STATUS1 0x41
#define ADM1025_REG_STATUS2 0x42
#define ADM1025_REG_VID 0x47
#define ADM1025_REG_VID4 0x49 /* actually R/W
but we don't write to it */
/* These are read/write */
#define ADM1025_REG_2_5V_HIGH 0x2B /* not used directly, see */
#define ADM1025_REG_2_5V_LOW 0x2C /* ADM1025_REG_IN_MAX(nr) and */
#define ADM1025_REG_VCCP1_HIGH 0x2D /* ADM1025_REG_IN_MIN(nr) below */
#define ADM1025_REG_VCCP1_LOW 0x2E
#define ADM1025_REG_3_3V_HIGH 0x2F
#define ADM1025_REG_3_3V_LOW 0x30
#define ADM1025_REG_5V_HIGH 0x31
#define ADM1025_REG_5V_LOW 0x32
#define ADM1025_REG_12V_HIGH 0x33
#define ADM1025_REG_12V_LOW 0x34
#define ADM1025_REG_VCC_HIGH 0x35
#define ADM1025_REG_VCC_LOW 0x36
#define ADM1025_REG_RTEMP_HIGH 0x37 /* not used directly, see */
#define ADM1025_REG_RTEMP_LOW 0x38 /* ADM1025_REG_TEMP_MAX(nr) and */
#define ADM1025_REG_LTEMP_HIGH 0x39 /* ADM1025_REG_TEMP_MIN(nr) below */
#define ADM1025_REG_LTEMP_LOW 0x3A
#define ADM1025_REG_CONFIG 0x40
/* Useful macros */
#define ADM1025_REG_IN(nr) (ADM1025_REG_2_5V + (nr))
#define ADM1025_REG_IN_MAX(nr) (ADM1025_REG_2_5V_HIGH + (nr) * 2)
#define ADM1025_REG_IN_MIN(nr) (ADM1025_REG_2_5V_LOW + (nr) * 2)
#define ADM1025_REG_TEMP(nr) (ADM1025_REG_RTEMP + (nr))
#define ADM1025_REG_TEMP_HIGH(nr) (ADM1025_REG_RTEMP_HIGH + (nr) * 2)
#define ADM1025_REG_TEMP_LOW(nr) (ADM1025_REG_RTEMP_LOW + (nr) * 2)
/* Conversions. Rounding and limit checking is only done on the TO_REG
variants. Note that you should be a bit careful with which arguments
these macros are called: arguments may be evaluated more than once.
Fixing this is just not worth it. */
#define IN_TO_REG(val) (SENSORS_LIMIT(((val) & 0xff),0,255))
#define IN_FROM_REG(val) (val)
#define TEMP_FROM_REG(val) (((val)>=0x80?(val)-0x100:(val))*10)
#define TEMP_TO_REG(val) SENSORS_LIMIT(((val)<0?(((val)-5)/10):\
((val)+5)/10),0,255)
#define ALARMS_FROM_REG(val) (val)
/* For each registered ADM1025, we need to keep some data in memory. That
data is pointed to by adm1025_list[NR]->data. The structure itself is
dynamically allocated, at the same time when a new adm1025 client is
allocated. */
struct adm1025_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 in[6]; /* Register value */
u8 in_max[6]; /* Register value */
u8 in_min[6]; /* Register value */
u8 temp[2]; /* Register value */
u8 temp_high[2]; /* Register value */
u8 temp_low[2]; /* Register value */
u16 alarms; /* Register encoding, combined */
u8 analog_out; /* Register value */
u8 vid; /* Register value combined */
u8 vrm;
};
static int adm1025_attach_adapter(struct i2c_adapter *adapter);
static int adm1025_detect(struct i2c_adapter *adapter, int address,
unsigned short flags, int kind);
static int adm1025_detach_client(struct i2c_client *client);
static void adm1025_update_client(struct i2c_client *client);
static void adm1025_init_client(struct i2c_client *client);
static void adm1025_in(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results);
static void adm1025_temp(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results);
static void adm1025_alarms(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results);
static void adm1025_vid(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results);
static void adm1025_vrm(struct i2c_client *client, int operation,
int ctl_name, int *nrels_mag, long *results);
static int adm1025_id = 0;
static struct i2c_driver adm1025_driver = {
.owner = THIS_MODULE,
.name = "ADM1025 sensor driver",
.id = I2C_DRIVERID_ADM1025,
.flags = I2C_DF_NOTIFY,
.attach_adapter = adm1025_attach_adapter,
.detach_client = adm1025_detach_client,
};
/* The /proc/sys entries */
/* -- SENSORS SYSCTL START -- */
#define ADM1025_SYSCTL_IN0 1000 /* Volts * 100 */
#define ADM1025_SYSCTL_IN1 1001
#define ADM1025_SYSCTL_IN2 1002
#define ADM1025_SYSCTL_IN3 1003
#define ADM1025_SYSCTL_IN4 1004
#define ADM1025_SYSCTL_IN5 1005
#define ADM1025_SYSCTL_RTEMP 1250 /* Degrees Celcius * 10 */
#define ADM1025_SYSCTL_TEMP 1251
#define ADM1025_SYSCTL_ALARMS 2001 /* bitvector */
#define ADM1025_SYSCTL_VID 2003 /* Volts * 1000 */
#define ADM1025_SYSCTL_VRM 2004
#define ADM1025_ALARM_IN0 0x0001
#define ADM1025_ALARM_IN1 0x0002
#define ADM1025_ALARM_IN2 0x0004
#define ADM1025_ALARM_IN3 0x0008
#define ADM1025_ALARM_IN4 0x0100
#define ADM1025_ALARM_IN5 0x0200
#define ADM1025_ALARM_RTEMP 0x0020
#define ADM1025_ALARM_TEMP 0x0010
#define ADM1025_ALARM_RFAULT 0x4000
/* -- SENSORS SYSCTL END -- */
/* These files are created for each detected ADM1025. 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 adm1025_dir_table_template[] = {
{ADM1025_SYSCTL_IN0, "in0", NULL, 0, 0644, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1025_in},
{ADM1025_SYSCTL_IN1, "in1", NULL, 0, 0644, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1025_in},
{ADM1025_SYSCTL_IN2, "in2", NULL, 0, 0644, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1025_in},
{ADM1025_SYSCTL_IN3, "in3", NULL, 0, 0644, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1025_in},
{ADM1025_SYSCTL_IN4, "in4", NULL, 0, 0644, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1025_in},
{ADM1025_SYSCTL_IN5, "in5", NULL, 0, 0644, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1025_in},
{ADM1025_SYSCTL_RTEMP, "temp1", NULL, 0, 0644, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1025_temp},
{ADM1025_SYSCTL_TEMP, "temp2", NULL, 0, 0644, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1025_temp},
{ADM1025_SYSCTL_ALARMS, "alarms", NULL, 0, 0444, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1025_alarms},
{ADM1025_SYSCTL_VID, "vid", NULL, 0, 0444, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1025_vid},
{ADM1025_SYSCTL_VRM, "vrm", NULL, 0, 0644, NULL, &i2c_proc_real,
&i2c_sysctl_real, NULL, &adm1025_vrm},
{0}
};
static int adm1025_attach_adapter(struct i2c_adapter *adapter)
{
return i2c_detect(adapter, &addr_data, adm1025_detect);
}
static int adm1025_detect(struct i2c_adapter *adapter, int address,
unsigned short flags, int kind)
{
int i;
struct i2c_client *new_client;
struct adm1025_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
("adm1025.o: adm1025_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 adm1025_{read,write}_value. */
if (!(data = kmalloc(sizeof(struct adm1025_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 = &adm1025_driver;
new_client->flags = 0;
/* Now, we do the remaining detection. */
if (kind < 0) {
if((i2c_smbus_read_byte_data(new_client,ADM1025_REG_CONFIG) & 0x80) != 0x00)
goto ERROR1;
}
/* Determine the chip type. */
if (kind <= 0) {
u8 man_id, chip_id;
man_id = i2c_smbus_read_byte_data(new_client,
ADM1025_REG_COMPANY_ID);
chip_id = i2c_smbus_read_byte_data(new_client,
ADM1025_REG_DIE_REV);
if (man_id == 0x41) { /* Analog Devices */
if ((chip_id & 0xF0) == 0x20) /* ADM1025 */
kind = adm1025;
} else if (man_id == 0xA1) { /* Philips */
if (address != 0x2E
&& (chip_id & 0xF0) == 0x20) /* NE1619 */
kind = ne1619;
}
}
if (kind <= 0) { /* Identification failed */
printk("adm1025.o: Unsupported chip.\n");
goto ERROR1;
}
if (kind == adm1025) {
type_name = "adm1025";
client_name = "ADM1025 chip";
} else if (kind == ne1619) {
type_name = "ne1619";
client_name = "NE1619 chip";
} else {
#ifdef DEBUG
printk("adm1025.o: Internal error: unknown kind (%d)?!?",
kind);
#endif
goto ERROR1;
}
/* 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 = adm1025_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,
adm1025_dir_table_template)) < 0) {
err = i;
goto ERROR4;
}
data->sysctl_id = i;
/* Initialize the ADM1025 chip */
adm1025_init_client(new_client);
return 0;
/* OK, this is not exactly good programming practice, usually. But it is
very code-efficient in this case. */
ERROR4:
i2c_detach_client(new_client);
ERROR3:
ERROR1:
kfree(data);
ERROR0:
return err;
}
static int adm1025_detach_client(struct i2c_client *client)
{
int err;
i2c_deregister_entry(((struct adm1025_data *) (client->data))->
sysctl_id);
if ((err = i2c_detach_client(client))) {
printk
("adm1025.o: Client deregistration failed, client not detached.\n");
return err;
}
kfree(client->data);
return 0;
}
/* Called when we have found a new ADM1025. */
static void adm1025_init_client(struct i2c_client *client)
{
struct adm1025_data *data = client->data;
u8 reg;
data->vrm = DEFAULT_VRM;
/* Start monitoring */
reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG);
i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG, (reg|0x01)&0x7F);
}
static void adm1025_update_client(struct i2c_client *client)
{
struct adm1025_data *data = client->data;
u8 nr;
down(&data->update_lock);
if ((jiffies - data->last_updated > 2 * HZ)
|| (jiffies < data->last_updated) || !data->valid) {
#ifdef DEBUG
printk("Starting adm1025 update\n");
#endif
/* Voltages */
for (nr = 0; nr < 6; nr++) {
data->in[nr] = i2c_smbus_read_byte_data(client, ADM1025_REG_IN(nr));
/* data->in_min[nr] = i2c_smbus_read_byte_data(client, ADM1025_REG_IN_MIN(nr));
data->in_max[nr] = i2c_smbus_read_byte_data(client, ADM1025_REG_IN_MAX(nr));*/
}
/* Temperatures */
for (nr = 0; nr < 2; nr++) {
data->temp[nr] = i2c_smbus_read_byte_data(client, ADM1025_REG_TEMP(nr));
/* data->temp_high[nr] = i2c_smbus_read_byte_data(client, ADM1025_REG_TEMP_HIGH(nr));
data->temp_low[nr] = i2c_smbus_read_byte_data(client, ADM1025_REG_TEMP_LOW(nr));*/
}
/* VID */
data->vid = (i2c_smbus_read_byte_data(client, ADM1025_REG_VID) & 0x0f)
+ ((i2c_smbus_read_byte_data(client, ADM1025_REG_VID4) & 0x01) << 4);
/* Alarms */
data->alarms = (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS1) & 0x3f)
+ ((i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS2) & 0x43) << 8);
data->last_updated = jiffies;
data->valid = 1;
}
up(&data->update_lock);
}
/* The next few functions are the call-back functions of the /proc/sys and
sysctl files. Which function is used is defined in the ctl_table in
the extra1 field.
Each function must return the magnitude (power of 10 to divide the data
with) if it is called with operation==SENSORS_PROC_REAL_INFO. It must
put a maximum of *nrels elements in results reflecting the data of this
file, and set *nrels to the number it actually put in it, if operation==
SENSORS_PROC_REAL_READ. Finally, it must get upto *nrels elements from
results and write them to the chip, if operations==SENSORS_PROC_REAL_WRITE.
Note that on SENSORS_PROC_REAL_READ, I do not check whether results is
large enough (by checking the incoming value of *nrels). This is not very
good practice, but as long as you put less than about 5 values in results,
you can assume it is large enough. */
void adm1025_in(struct i2c_client *client, int operation, int ctl_name,
int *nrels_mag, long *results)
{
int scales[6] = { 250, 225, 330, 500, 1200, 330 };
struct adm1025_data *data = client->data;
int nr = ctl_name - ADM1025_SYSCTL_IN0;
if (operation == SENSORS_PROC_REAL_INFO)
*nrels_mag = 2;
else if (operation == SENSORS_PROC_REAL_READ) {
adm1025_update_client(client);
results[0] = (IN_FROM_REG(data->in_min[nr]) * scales[nr] + 96) / 192;
results[1] = (IN_FROM_REG(data->in_max[nr]) * scales[nr] + 96) / 192;
results[2] = (IN_FROM_REG(data->in[nr]) * scales[nr] + 96) / 192;
*nrels_mag = 3;
} else if (operation == SENSORS_PROC_REAL_WRITE) {
if (*nrels_mag >= 1) {
data->in_min[nr] = IN_TO_REG((results[0] * 192 + scales[nr] / 2)
/ scales[nr]);
i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(nr),
data->in_min[nr]);
}
if (*nrels_mag >= 2) {
data->in_max[nr] = IN_TO_REG((results[1] * 192 + scales[nr] / 2)
/ scales[nr]);
i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(nr),
data->in_max[nr]);
}
}
}
void adm1025_temp(struct i2c_client *client, int operation, int ctl_name,
int *nrels_mag, long *results)
{
struct adm1025_data *data = client->data;
int nr = ctl_name - ADM1025_SYSCTL_RTEMP;
if (operation == SENSORS_PROC_REAL_INFO)
*nrels_mag = 1;
else if (operation == SENSORS_PROC_REAL_READ) {
adm1025_update_client(client);
results[0] = TEMP_FROM_REG(data->temp_high[nr]);
results[1] = TEMP_FROM_REG(data->temp_low[nr]);
results[2] = TEMP_FROM_REG(data->temp[nr]);
*nrels_mag = 3;
} else if (operation == SENSORS_PROC_REAL_WRITE) {
if (*nrels_mag >= 1) {
data->temp_high[nr] = TEMP_TO_REG(results[0]);
i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(nr),
data->temp_high[nr]);
}
if (*nrels_mag >= 2) {
data->temp_low[nr] = TEMP_TO_REG(results[1]);
i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(nr),
data->temp_low[nr]);
}
}
}
void adm1025_alarms(struct i2c_client *client, int operation, int ctl_name,
int *nrels_mag, long *results)
{
struct adm1025_data *data = client->data;
if (operation == SENSORS_PROC_REAL_INFO)
*nrels_mag = 0;
else if (operation == SENSORS_PROC_REAL_READ) {
adm1025_update_client(client);
results[0] = ALARMS_FROM_REG(data->alarms);
*nrels_mag = 1;
}
}
void adm1025_vid(struct i2c_client *client, int operation, int ctl_name,
int *nrels_mag, long *results)
{
struct adm1025_data *data = client->data;
if (operation == SENSORS_PROC_REAL_INFO)
*nrels_mag = 3;
else if (operation == SENSORS_PROC_REAL_READ) {
adm1025_update_client(client);
results[0] = vid_from_reg(data->vid, data->vrm);
*nrels_mag = 1;
}
}
void adm1025_vrm(struct i2c_client *client, int operation, int ctl_name,
int *nrels_mag, long *results)
{
struct adm1025_data *data = client->data;
if (operation == SENSORS_PROC_REAL_INFO)
*nrels_mag = 1;
else if (operation == SENSORS_PROC_REAL_READ) {
results[0] = data->vrm;
*nrels_mag = 1;
} else if (operation == SENSORS_PROC_REAL_WRITE) {
if (*nrels_mag >= 1)
data->vrm = results[0];
}
}
static int __init sm_adm1025_init(void)
{
printk("adm1025.o version %s (%s)\n", LM_VERSION, LM_DATE);
return i2c_add_driver(&adm1025_driver);
}
static void __exit sm_adm1025_exit(void)
{
i2c_del_driver(&adm1025_driver);
}
MODULE_AUTHOR("Chen-Yuan Wu <gwu@esoft.com>"
" and Jean Delvare <khali@linux-fr.org>");
MODULE_DESCRIPTION("ADM1025 driver");
module_init(sm_adm1025_init);
module_exit(sm_adm1025_exit);
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