--- /dev/null
+/*
+ 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);
+
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