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Commit dd7f69c7 authored by Mark M. Hoffman's avatar Mark M. Hoffman Committed by Tom Rini
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[PATCH] I2C: Add ported sensor chip driver: asb100 

This patch adds support for the ASB100 Bach sensor chip, which
is found on some Asus mainboards.  The port corresponds to
lm_sensors CVS revision 1.5.  The patch applies to and was tested
against 2.6.1-rc1.
parent 1e272f7f
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drivers/i2c/chips/Kconfig
View file @ dd7f69c7
......@@ -21,6 +21,17 @@ config SENSORS_ADM1021
This driver can also be built as a module. If so, the module
will be called adm1021.
config SENSORS_ASB100
tristate "Asus ASB100 Bach"
depends on I2C && EXPERIMENTAL
select I2C_SENSOR
help
If you say yes here you get support for the ASB100 Bach sensor
chip found on some Asus mainboards.
This driver can also be built as a module. If so, the module
will be called asb100.
config SENSORS_EEPROM
tristate "EEPROM (DIMM) reader"
depends on I2C && EXPERIMENTAL
......
drivers/i2c/chips/Makefile
View file @ dd7f69c7
......@@ -6,6 +6,7 @@
obj-$(CONFIG_SENSORS_W83781D) += w83781d.o
obj-$(CONFIG_SENSORS_ADM1021) += adm1021.o
obj-$(CONFIG_SENSORS_ASB100) += asb100.o
obj-$(CONFIG_SENSORS_EEPROM) += eeprom.o
obj-$(CONFIG_SENSORS_IT87) += it87.o
obj-$(CONFIG_SENSORS_LM75) += lm75.o
......
drivers/i2c/chips/asb100.c 0 → 100644
View file @ dd7f69c7
/*
asb100.c - Part of lm_sensors, Linux kernel modules for hardware
monitoring
Copyright (C) 2004 Mark M. Hoffman <mhoffman@lightlink.com>
(derived from w83781d.c)
Copyright (C) 1998 - 2003 Frodo Looijaard <frodol@dds.nl>,
Philip Edelbrock <phil@netroedge.com>, and
Mark Studebaker <mdsxyz123@yahoo.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.
*/
/*
This driver supports the hardware sensor chips: Asus ASB100 and
ASB100-A "BACH".
ASB100-A supports pwm1, while plain ASB100 does not. There is no known
way for the driver to tell which one is there.
Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
asb100 7 3 1 4 0x31 0x0694 yes no
*/
/* #define DEBUG 1 */
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/types.h>
#include <linux/i2c.h>
#include <linux/i2c-sensor.h>
#include <linux/i2c-vid.h>
#include <linux/init.h>
#include <asm/errno.h>
#include <asm/io.h>
#include "lm75.h"
/*
HISTORY:
2003-12-29 1.0.0 Ported from lm_sensors project for kernel 2.6
*/
#define ASB100_VERSION "1.0.0"
/* I2C addresses to scan */
static unsigned short normal_i2c[] = { I2C_CLIENT_END };
static unsigned short normal_i2c_range[] = { 0x28, 0x2f, I2C_CLIENT_END };
/* ISA addresses to scan (none) */
static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
static unsigned int normal_isa_range[] = { I2C_CLIENT_ISA_END };
/* default VRM to 9.0 instead of 8.2 */
#define ASB100_DEFAULT_VRM 90
/* Insmod parameters */
SENSORS_INSMOD_1(asb100);
I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
"{bus, clientaddr, subclientaddr1, subclientaddr2}");
/* Voltage IN registers 0-6 */
#define ASB100_REG_IN(nr) (0x20 + (nr))
#define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2))
#define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2))
/* FAN IN registers 1-3 */
#define ASB100_REG_FAN(nr) (0x28 + (nr))
#define ASB100_REG_FAN_MIN(nr) (0x3b + (nr))
/* TEMPERATURE registers 1-4 */
static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17};
static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18};
static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19};
#define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr])
#define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr])
#define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr])
#define ASB100_REG_TEMP2_CONFIG 0x0152
#define ASB100_REG_TEMP3_CONFIG 0x0252
#define ASB100_REG_CONFIG 0x40
#define ASB100_REG_ALARM1 0x41
#define ASB100_REG_ALARM2 0x42
#define ASB100_REG_SMIM1 0x43
#define ASB100_REG_SMIM2 0x44
#define ASB100_REG_VID_FANDIV 0x47
#define ASB100_REG_I2C_ADDR 0x48
#define ASB100_REG_CHIPID 0x49
#define ASB100_REG_I2C_SUBADDR 0x4a
#define ASB100_REG_PIN 0x4b
#define ASB100_REG_IRQ 0x4c
#define ASB100_REG_BANK 0x4e
#define ASB100_REG_CHIPMAN 0x4f
#define ASB100_REG_WCHIPID 0x58
/* bit 7 -> enable, bits 0-3 -> duty cycle */
#define ASB100_REG_PWM1 0x59
/* CONVERSIONS
Rounding and limit checking is only done on the TO_REG variants. */
/* These constants are a guess, consistent w/ w83781d */
#define ASB100_IN_MIN ( 0)
#define ASB100_IN_MAX (4080)
/* IN: 1/1000 V (0V to 4.08V)
REG: 16mV/bit */
static u8 IN_TO_REG(unsigned val)
{
unsigned nval = SENSORS_LIMIT(val, ASB100_IN_MIN, ASB100_IN_MAX);
return nval / 16;
}
static unsigned IN_FROM_REG(u8 reg)
{
return reg * 16;
}
static u8 FAN_TO_REG(long rpm, int div)
{
if (rpm == -1)
return 0;
if (rpm == 0)
return 255;
rpm = SENSORS_LIMIT(rpm, 1, 1000000);
return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
}
static int FAN_FROM_REG(u8 val, int div)
{
return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div);
}
/* These constants are a guess, consistent w/ w83781d */
#define ASB100_TEMP_MIN (-128000)
#define ASB100_TEMP_MAX ( 127000)
/* TEMP: 0.001C/bit (-128C to +127C)
REG: 1C/bit, two's complement */
static u8 TEMP_TO_REG(int temp)
{
int ntemp = SENSORS_LIMIT(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX);
ntemp += (ntemp<0 ? -500 : 500);
return (u8)(ntemp / 1000);
}
static int TEMP_FROM_REG(u8 reg)
{
return (s8)reg * 1000;
}
/* PWM: 0 - 255 per sensors documentation
REG: (6.25% duty cycle per bit) */
static u8 ASB100_PWM_TO_REG(int pwm)
{
pwm = SENSORS_LIMIT(pwm, 0, 255);
return (u8)(pwm / 16);
}
static int ASB100_PWM_FROM_REG(u8 reg)
{
return reg * 16;
}
#define ALARMS_FROM_REG(val) (val)
#define DIV_FROM_REG(val) (1 << (val))
/* FAN DIV: 1, 2, 4, or 8 (defaults to 2)
REG: 0, 1, 2, or 3 (respectively) (defaults to 1) */
static u8 DIV_TO_REG(long val)
{
return val==8 ? 3 : val==4 ? 2 : val==1 ? 0 : 1;
}
/* For each registered client, we need to keep some data in memory. That
data is pointed to by client->data. The structure itself is
dynamically allocated, at the same time the client itself is allocated. */
struct asb100_data {
struct semaphore lock;
enum chips type;
struct semaphore update_lock;
unsigned long last_updated; /* In jiffies */
/* array of 2 pointers to subclients */
struct i2c_client *lm75[2];
char valid; /* !=0 if following fields are valid */
u8 in[7]; /* Register value */
u8 in_max[7]; /* Register value */
u8 in_min[7]; /* Register value */
u8 fan[3]; /* Register value */
u8 fan_min[3]; /* Register value */
u16 temp[4]; /* Register value (0 and 3 are u8 only) */
u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */
u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */
u8 fan_div[3]; /* Register encoding, right justified */
u8 pwm; /* Register encoding */
u8 vid; /* Register encoding, combined */
u32 alarms; /* Register encoding, combined */
u8 vrm;
};
static int asb100_read_value(struct i2c_client *client, u16 reg);
static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val);
static int asb100_attach_adapter(struct i2c_adapter *adapter);
static int asb100_detect(struct i2c_adapter *adapter, int address, int kind);
static int asb100_detach_client(struct i2c_client *client);
static struct asb100_data *asb100_update_device(struct device *dev);
static void asb100_init_client(struct i2c_client *client);
static struct i2c_driver asb100_driver = {
.owner = THIS_MODULE,
.name = "asb100",
.id = I2C_DRIVERID_ASB100,
.flags = I2C_DF_NOTIFY,
.attach_adapter = asb100_attach_adapter,
.detach_client = asb100_detach_client,
};
/* 7 Voltages */
#define show_in_reg(reg) \
static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
{ \
struct asb100_data *data = asb100_update_device(dev); \
return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
}
show_in_reg(in)
show_in_reg(in_min)
show_in_reg(in_max)
#define set_in_reg(REG, reg) \
static ssize_t set_in_##reg(struct device *dev, const char *buf, \
size_t count, int nr) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct asb100_data *data = i2c_get_clientdata(client); \
unsigned long val = simple_strtoul(buf, NULL, 10); \
data->in_##reg[nr] = IN_TO_REG(val); \
asb100_write_value(client, ASB100_REG_IN_##REG(nr), \
data->in_##reg[nr]); \
return count; \
}
set_in_reg(MIN, min)
set_in_reg(MAX, max)
#define sysfs_in(offset) \
static ssize_t \
show_in##offset (struct device *dev, char *buf) \
{ \
return show_in(dev, buf, 0x##offset); \
} \
static DEVICE_ATTR(in_input##offset, S_IRUGO, \
show_in##offset, NULL) \
static ssize_t \
show_in##offset##_min (struct device *dev, char *buf) \
{ \
return show_in_min(dev, buf, 0x##offset); \
} \
static ssize_t \
show_in##offset##_max (struct device *dev, char *buf) \
{ \
return show_in_max(dev, buf, 0x##offset); \
} \
static ssize_t set_in##offset##_min (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_in_min(dev, buf, count, 0x##offset); \
} \
static ssize_t set_in##offset##_max (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_in_max(dev, buf, count, 0x##offset); \
} \
static DEVICE_ATTR(in_min##offset, S_IRUGO | S_IWUSR, \
show_in##offset##_min, set_in##offset##_min) \
static DEVICE_ATTR(in_max##offset, S_IRUGO | S_IWUSR, \
show_in##offset##_max, set_in##offset##_max)
sysfs_in(0)
sysfs_in(1)
sysfs_in(2)
sysfs_in(3)
sysfs_in(4)
sysfs_in(5)
sysfs_in(6)
#define device_create_file_in(client, offset) do { \
device_create_file(&client->dev, &dev_attr_in_input##offset); \
device_create_file(&client->dev, &dev_attr_in_min##offset); \
device_create_file(&client->dev, &dev_attr_in_max##offset); \
} while (0)
/* 3 Fans */
static ssize_t show_fan(struct device *dev, char *buf, int nr)
{
struct asb100_data *data = asb100_update_device(dev);
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
DIV_FROM_REG(data->fan_div[nr])));
}
static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
{
struct asb100_data *data = asb100_update_device(dev);
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
DIV_FROM_REG(data->fan_div[nr])));
}
static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
{
struct asb100_data *data = asb100_update_device(dev);
return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
}
static ssize_t set_fan_min(struct device *dev, const char *buf,
size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct asb100_data *data = i2c_get_clientdata(client);
u32 val = simple_strtoul(buf, NULL, 10);
data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
return count;
}
/* Note: we save and restore the fan minimum here, because its value is
determined in part by the fan divisor. This follows the principle of
least suprise; the user doesn't expect the fan minimum to change just
because the divisor changed. */
static ssize_t set_fan_div(struct device *dev, const char *buf,
size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct asb100_data *data = i2c_get_clientdata(client);
unsigned long min = FAN_FROM_REG(data->fan_min[nr],
DIV_FROM_REG(data->fan_div[nr]));
unsigned long val = simple_strtoul(buf, NULL, 10);
int reg;
data->fan_div[nr] = DIV_TO_REG(val);
switch(nr) {
case 0: /* fan 1 */
reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
reg = (reg & 0xcf) | (data->fan_div[0] << 4);
asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
break;
case 1: /* fan 2 */
reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
reg = (reg & 0x3f) | (data->fan_div[1] << 6);
asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
break;
case 2: /* fan 3 */
reg = asb100_read_value(client, ASB100_REG_PIN);
reg = (reg & 0x3f) | (data->fan_div[2] << 6);
asb100_write_value(client, ASB100_REG_PIN, reg);
break;
}
data->fan_min[nr] =
FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
return count;
}
#define sysfs_fan(offset) \
static ssize_t show_fan##offset(struct device *dev, char *buf) \
{ \
return show_fan(dev, buf, offset - 1); \
} \
static ssize_t show_fan##offset##_min(struct device *dev, char *buf) \
{ \
return show_fan_min(dev, buf, offset - 1); \
} \
static ssize_t show_fan##offset##_div(struct device *dev, char *buf) \
{ \
return show_fan_div(dev, buf, offset - 1); \
} \
static ssize_t set_fan##offset##_min(struct device *dev, const char *buf, \
size_t count) \
{ \
return set_fan_min(dev, buf, count, offset - 1); \
} \
static ssize_t set_fan##offset##_div(struct device *dev, const char *buf, \
size_t count) \
{ \
return set_fan_div(dev, buf, count, offset - 1); \
} \
static DEVICE_ATTR(fan_input##offset, S_IRUGO, \
show_fan##offset, NULL) \
static DEVICE_ATTR(fan_min##offset, S_IRUGO | S_IWUSR, \
show_fan##offset##_min, set_fan##offset##_min) \
static DEVICE_ATTR(fan_div##offset, S_IRUGO | S_IWUSR, \
show_fan##offset##_div, set_fan##offset##_div)
sysfs_fan(1)
sysfs_fan(2)
sysfs_fan(3)
#define device_create_file_fan(client, offset) do { \
device_create_file(&client->dev, &dev_attr_fan_input##offset); \
device_create_file(&client->dev, &dev_attr_fan_min##offset); \
device_create_file(&client->dev, &dev_attr_fan_div##offset); \
} while (0)
/* 4 Temp. Sensors */
static int sprintf_temp_from_reg(u16 reg, char *buf, int nr)
{
int ret = 0;
switch (nr) {
case 1: case 2:
ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg));
break;
case 0: case 3: default:
ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg));
break;
}
return ret;
}
#define show_temp_reg(reg) \
static ssize_t show_##reg(struct device *dev, char *buf, int nr) \
{ \
struct asb100_data *data = asb100_update_device(dev); \
return sprintf_temp_from_reg(data->reg[nr], buf, nr); \
}
show_temp_reg(temp)
show_temp_reg(temp_max)
show_temp_reg(temp_hyst)
#define set_temp_reg(REG, reg) \
static ssize_t set_##reg(struct device *dev, const char *buf, \
size_t count, int nr) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct asb100_data *data = i2c_get_clientdata(client); \
unsigned long val = simple_strtoul(buf, NULL, 10); \
switch (nr) { \
case 1: case 2: \
data->reg[nr] = LM75_TEMP_TO_REG(val); \
break; \
case 0: case 3: default: \
data->reg[nr] = TEMP_TO_REG(val); \
break; \
} \
asb100_write_value(client, ASB100_REG_TEMP_##REG(nr), \
data->reg[nr]); \
return count; \
}
set_temp_reg(MAX, temp_max)
set_temp_reg(HYST, temp_hyst)
#define sysfs_temp(num) \
static ssize_t show_temp##num(struct device *dev, char *buf) \
{ \
return show_temp(dev, buf, num-1); \
} \
static DEVICE_ATTR(temp_input##num, S_IRUGO, show_temp##num, NULL) \
static ssize_t show_temp_max##num(struct device *dev, char *buf) \
{ \
return show_temp_max(dev, buf, num-1); \
} \
static ssize_t set_temp_max##num(struct device *dev, const char *buf, \
size_t count) \
{ \
return set_temp_max(dev, buf, count, num-1); \
} \
static DEVICE_ATTR(temp_max##num, S_IRUGO | S_IWUSR, \
show_temp_max##num, set_temp_max##num) \
static ssize_t show_temp_hyst##num(struct device *dev, char *buf) \
{ \
return show_temp_hyst(dev, buf, num-1); \
} \
static ssize_t set_temp_hyst##num(struct device *dev, const char *buf, \
size_t count) \
{ \
return set_temp_hyst(dev, buf, count, num-1); \
} \
static DEVICE_ATTR(temp_hyst##num, S_IRUGO | S_IWUSR, \
show_temp_hyst##num, set_temp_hyst##num)
sysfs_temp(1)
sysfs_temp(2)
sysfs_temp(3)
sysfs_temp(4)
/* VID */
#define device_create_file_temp(client, num) do { \
device_create_file(&client->dev, &dev_attr_temp_input##num); \
device_create_file(&client->dev, &dev_attr_temp_max##num); \
device_create_file(&client->dev, &dev_attr_temp_hyst##num); \
} while (0)
static ssize_t show_vid(struct device *dev, char *buf)
{
struct asb100_data *data = asb100_update_device(dev);
return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
}
static DEVICE_ATTR(vid, S_IRUGO, show_vid, NULL)
#define device_create_file_vid(client) \
device_create_file(&client->dev, &dev_attr_vid)
/* VRM */
static ssize_t show_vrm(struct device *dev, char *buf)
{
struct asb100_data *data = asb100_update_device(dev);
return sprintf(buf, "%d\n", data->vrm);
}
static ssize_t set_vrm(struct device *dev, const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct asb100_data *data = i2c_get_clientdata(client);
unsigned long val = simple_strtoul(buf, NULL, 10);
data->vrm = val;
return count;
}
/* Alarms */
static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm)
#define device_create_file_vrm(client) \
device_create_file(&client->dev, &dev_attr_vrm);
static ssize_t show_alarms(struct device *dev, char *buf)
{
struct asb100_data *data = asb100_update_device(dev);
return sprintf(buf, "%d\n", ALARMS_FROM_REG(data->alarms));
}
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL)
#define device_create_file_alarms(client) \
device_create_file(&client->dev, &dev_attr_alarms)
/* 1 PWM */
static ssize_t show_pwm1(struct device *dev, char *buf)
{
struct asb100_data *data = asb100_update_device(dev);
return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f));
}
static ssize_t set_pwm1(struct device *dev, const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct asb100_data *data = i2c_get_clientdata(client);
unsigned long val = simple_strtoul(buf, NULL, 10);
data->pwm &= 0x80; /* keep the enable bit */
data->pwm |= (0x0f & ASB100_PWM_TO_REG(val));
asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
return count;
}
static ssize_t show_pwm_enable1(struct device *dev, char *buf)
{
struct asb100_data *data = asb100_update_device(dev);
return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0);
}
static ssize_t set_pwm_enable1(struct device *dev, const char *buf,
size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct asb100_data *data = i2c_get_clientdata(client);
unsigned long val = simple_strtoul(buf, NULL, 10);
data->pwm &= 0x0f; /* keep the duty cycle bits */
data->pwm |= (val ? 0x80 : 0x00);
asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
return count;
}
static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1)
static DEVICE_ATTR(pwm_enable1, S_IRUGO | S_IWUSR,
show_pwm_enable1, set_pwm_enable1)
#define device_create_file_pwm1(client) do { \
device_create_file(&new_client->dev, &dev_attr_pwm1); \
device_create_file(&new_client->dev, &dev_attr_pwm_enable1); \
} while (0)
/* This function is called when:
asb100_driver is inserted (when this module is loaded), for each
available adapter
when a new adapter is inserted (and asb100_driver is still present)
*/
static int asb100_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_ADAP_CLASS_SMBUS))
return 0;
return i2c_detect(adapter, &addr_data, asb100_detect);
}
static int asb100_detect_subclients(struct i2c_adapter *adapter, int address,
int kind, struct i2c_client *new_client)
{
int i, id, err;
struct asb100_data *data = i2c_get_clientdata(new_client);
data->lm75[0] = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
if (!(data->lm75[0])) {
err = -ENOMEM;
goto ERROR_SC_0;
}
memset(data->lm75[0], 0x00, sizeof(struct i2c_client));
data->lm75[1] = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
if (!(data->lm75[1])) {
err = -ENOMEM;
goto ERROR_SC_1;
}
memset(data->lm75[1], 0x00, sizeof(struct i2c_client));
id = i2c_adapter_id(adapter);
if (force_subclients[0] == id && force_subclients[1] == address) {
for (i = 2; i <= 3; i++) {
if (force_subclients[i] < 0x48 ||
force_subclients[i] > 0x4f) {
dev_err(&new_client->dev, "invalid subclient "
"address %d; must be 0x48-0x4f\n",
force_subclients[i]);
err = -ENODEV;
goto ERROR_SC_2;
}
}
asb100_write_value(new_client, ASB100_REG_I2C_SUBADDR,
(force_subclients[2] & 0x07) |
((force_subclients[3] & 0x07) <<4));
data->lm75[0]->addr = force_subclients[2];
data->lm75[1]->addr = force_subclients[3];
} else {
int val = asb100_read_value(new_client, ASB100_REG_I2C_SUBADDR);
data->lm75[0]->addr = 0x48 + (val & 0x07);
data->lm75[1]->addr = 0x48 + ((val >> 4) & 0x07);
}
if(data->lm75[0]->addr == data->lm75[1]->addr) {
dev_err(&new_client->dev, "duplicate addresses 0x%x "
"for subclients\n", data->lm75[0]->addr);
err = -ENODEV;
goto ERROR_SC_2;
}
for (i = 0; i <= 1; i++) {
i2c_set_clientdata(data->lm75[i], NULL);
data->lm75[i]->adapter = adapter;
data->lm75[i]->driver = &asb100_driver;
data->lm75[i]->flags = 0;
strlcpy(data->lm75[i]->name, "asb100 subclient", I2C_NAME_SIZE);
}
if ((err = i2c_attach_client(data->lm75[0]))) {
dev_err(&new_client->dev, "subclient %d registration "
"at address 0x%x failed.\n", i, data->lm75[0]->addr);
goto ERROR_SC_2;
}
if ((err = i2c_attach_client(data->lm75[1]))) {
dev_err(&new_client->dev, "subclient %d registration "
"at address 0x%x failed.\n", i, data->lm75[1]->addr);
goto ERROR_SC_3;
}
return 0;
/* Undo inits in case of errors */
ERROR_SC_3:
i2c_detach_client(data->lm75[0]);
ERROR_SC_2:
kfree(data->lm75[1]);
ERROR_SC_1:
kfree(data->lm75[0]);
ERROR_SC_0:
return err;
}
static int asb100_detect(struct i2c_adapter *adapter, int address, int kind)
{
int err;
struct i2c_client *new_client;
struct asb100_data *data;
/* asb100 is SMBus only */
if (i2c_is_isa_adapter(adapter)) {
pr_debug("asb100.o: detect failed, "
"cannot attach to legacy adapter!\n");
err = -ENODEV;
goto ERROR0;
}
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
pr_debug("asb100.o: detect failed, "
"smbus byte data not supported!\n");
err = -ENODEV;
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 asb100_{read,write}_value. */
if (!(new_client = kmalloc(sizeof(struct i2c_client) +
sizeof(struct asb100_data), GFP_KERNEL))) {
pr_debug("asb100.o: detect failed, kmalloc failed!\n");
err = -ENOMEM;
goto ERROR0;
}
memset(new_client, 0,
sizeof(struct i2c_client) + sizeof(struct asb100_data));
data = (struct asb100_data *) (new_client + 1);
init_MUTEX(&data->lock);
i2c_set_clientdata(new_client, data);
new_client->addr = address;
new_client->adapter = adapter;
new_client->driver = &asb100_driver;
new_client->flags = 0;
/* Now, we do the remaining detection. */
/* The chip may be stuck in some other bank than bank 0. This may
make reading other information impossible. Specify a force=... or
force_*=... parameter, and the chip will be reset to the right
bank. */
if (kind < 0) {
int val1 = asb100_read_value(new_client, ASB100_REG_BANK);
int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
/* If we're in bank 0 */
if ( (!(val1 & 0x07)) &&
/* Check for ASB100 ID (low byte) */
( ((!(val1 & 0x80)) && (val2 != 0x94)) ||
/* Check for ASB100 ID (high byte ) */
((val1 & 0x80) && (val2 != 0x06)) ) ) {
pr_debug("asb100.o: detect failed, "
"bad chip id 0x%02x!\n", val2);
err = -ENODEV;
goto ERROR1;
}
} /* kind < 0 */
/* We have either had a force parameter, or we have already detected
Winbond. Put it now into bank 0 and Vendor ID High Byte */
asb100_write_value(new_client, ASB100_REG_BANK,
(asb100_read_value(new_client, ASB100_REG_BANK) & 0x78) | 0x80);
/* Determine the chip type. */
if (kind <= 0) {
int val1 = asb100_read_value(new_client, ASB100_REG_WCHIPID);
int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
if ((val1 == 0x31) && (val2 == 0x06))
kind = asb100;
else {
if (kind == 0)
dev_warn(&new_client->dev, "ignoring "
"'force' parameter for unknown chip "
"at adapter %d, address 0x%02x.\n",
i2c_adapter_id(adapter), address);
err = -ENODEV;
goto ERROR1;
}
}
/* Fill in remaining client fields and put it into the global list */
strlcpy(new_client->name, "asb100", I2C_NAME_SIZE);
data->type = kind;
data->valid = 0;
init_MUTEX(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client)))
goto ERROR1;
/* Attach secondary lm75 clients */
if ((err = asb100_detect_subclients(adapter, address, kind,
new_client)))
goto ERROR2;
/* Initialize the chip */
asb100_init_client(new_client);
/* Register sysfs hooks */
device_create_file_in(new_client, 0);
device_create_file_in(new_client, 1);
device_create_file_in(new_client, 2);
device_create_file_in(new_client, 3);
device_create_file_in(new_client, 4);
device_create_file_in(new_client, 5);
device_create_file_in(new_client, 6);
device_create_file_fan(new_client, 1);
device_create_file_fan(new_client, 2);
device_create_file_fan(new_client, 3);
device_create_file_temp(new_client, 1);
device_create_file_temp(new_client, 2);
device_create_file_temp(new_client, 3);
device_create_file_temp(new_client, 4);
device_create_file_vid(new_client);
device_create_file_vrm(new_client);
device_create_file_alarms(new_client);
device_create_file_pwm1(new_client);
return 0;
ERROR2:
i2c_detach_client(new_client);
ERROR1:
kfree(new_client);
ERROR0:
return err;
}
static int asb100_detach_client(struct i2c_client *client)
{
int err;
if ((err = i2c_detach_client(client))) {
dev_err(&client->dev, "client deregistration failed; "
"client not detached.\n");
return err;
}
kfree(client);
return 0;
}
static u16 swap_bytes(u16 val)
{
return (val >> 8) | (val << 8);
}
/* The SMBus locks itself, usually, but nothing may access the chip between
bank switches. */
static int asb100_read_value(struct i2c_client *client, u16 reg)
{
struct asb100_data *data = i2c_get_clientdata(client);
struct i2c_client *cl;
int res, bank;
down(&data->lock);
bank = (reg >> 8) & 0x0f;
if (bank > 2)
/* switch banks */
i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
if (bank == 0 || bank > 2) {
res = i2c_smbus_read_byte_data(client, reg & 0xff);
} else {
/* switch to subclient */
cl = data->lm75[bank - 1];
/* convert from ISA to LM75 I2C addresses */
switch (reg & 0xff) {
case 0x50: /* TEMP */
res = swap_bytes(i2c_smbus_read_word_data (cl, 0));
break;
case 0x52: /* CONFIG */
res = i2c_smbus_read_byte_data(cl, 1);
break;
case 0x53: /* HYST */
res = swap_bytes(i2c_smbus_read_word_data (cl, 2));
break;
case 0x55: /* MAX */
default:
res = swap_bytes(i2c_smbus_read_word_data (cl, 3));
break;
}
}
if (bank > 2)
i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
up(&data->lock);
return res;
}
static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value)
{
struct asb100_data *data = i2c_get_clientdata(client);
struct i2c_client *cl;
int bank;
down(&data->lock);
bank = (reg >> 8) & 0x0f;
if (bank > 2)
/* switch banks */
i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
if (bank == 0 || bank > 2) {
i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff);
} else {
/* switch to subclient */
cl = data->lm75[bank - 1];
/* convert from ISA to LM75 I2C addresses */
switch (reg & 0xff) {
case 0x52: /* CONFIG */
i2c_smbus_write_byte_data(cl, 1, value & 0xff);
break;
case 0x53: /* HYST */
i2c_smbus_write_word_data(cl, 2, swap_bytes(value));
break;
case 0x55: /* MAX */
i2c_smbus_write_word_data(cl, 3, swap_bytes(value));
break;
}
}
if (bank > 2)
i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
up(&data->lock);
}
static void asb100_init_client(struct i2c_client *client)
{
struct asb100_data *data = i2c_get_clientdata(client);
int vid = 0;
vid = asb100_read_value(client, ASB100_REG_VID_FANDIV) & 0x0f;
vid |= (asb100_read_value(client, ASB100_REG_CHIPID) & 0x01) << 4;
data->vrm = ASB100_DEFAULT_VRM;
vid = vid_from_reg(vid, data->vrm);
/* Start monitoring */
asb100_write_value(client, ASB100_REG_CONFIG,
(asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01);
}
static struct asb100_data *asb100_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct asb100_data *data = i2c_get_clientdata(client);
int i;
down(&data->update_lock);
if (time_after(jiffies - data->last_updated, (unsigned long)(HZ+HZ/2))
|| time_before(jiffies, data->last_updated) || !data->valid) {
dev_dbg(&client->dev, "starting device update...\n");
/* 7 voltage inputs */
for (i = 0; i < 7; i++) {
data->in[i] = asb100_read_value(client,
ASB100_REG_IN(i));
data->in_min[i] = asb100_read_value(client,
ASB100_REG_IN_MIN(i));
data->in_max[i] = asb100_read_value(client,
ASB100_REG_IN_MAX(i));
}
/* 3 fan inputs */
for (i = 0; i < 3; i++) {
data->fan[i] = asb100_read_value(client,
ASB100_REG_FAN(i));
data->fan_min[i] = asb100_read_value(client,
ASB100_REG_FAN_MIN(i));
}
/* 4 temperature inputs */
for (i = 1; i <= 4; i++) {
data->temp[i-1] = asb100_read_value(client,
ASB100_REG_TEMP(i));
data->temp_max[i-1] = asb100_read_value(client,
ASB100_REG_TEMP_MAX(i));
data->temp_hyst[i-1] = asb100_read_value(client,
ASB100_REG_TEMP_HYST(i));
}
/* VID and fan divisors */
i = asb100_read_value(client, ASB100_REG_VID_FANDIV);
data->vid = i & 0x0f;
data->vid |= (asb100_read_value(client,
ASB100_REG_CHIPID) & 0x01) << 4;
data->fan_div[0] = (i >> 4) & 0x03;
data->fan_div[1] = (i >> 6) & 0x03;
data->fan_div[2] = (asb100_read_value(client,
ASB100_REG_PIN) >> 6) & 0x03;
/* PWM */
data->pwm = asb100_read_value(client, ASB100_REG_PWM1);
/* alarms */
data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) +
(asb100_read_value(client, ASB100_REG_ALARM2) << 8);
data->last_updated = jiffies;
data->valid = 1;
dev_dbg(&client->dev, "... device update complete\n");
}
up(&data->update_lock);
return data;
}
static int __init asb100_init(void)
{
printk(KERN_INFO "asb100 version %s\n", ASB100_VERSION);
return i2c_add_driver(&asb100_driver);
}
static void __exit asb100_exit(void)
{
i2c_del_driver(&asb100_driver);
}
MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
MODULE_DESCRIPTION("ASB100 Bach driver");
MODULE_LICENSE("GPL");
module_init(asb100_init);
module_exit(asb100_exit);
include/linux/i2c-id.h
View file @ dd7f69c7
......@@ -154,6 +154,7 @@
#define I2C_DRIVERID_W83627HF 1038
#define I2C_DRIVERID_LM85 1039
#define I2C_DRIVERID_LM83 1040
#define I2C_DRIVERID_ASB100 1043
/*
* ---- Adapter types ----------------------------------------------------
......
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