Greetings, This is my completion of porting adm9240 driver that Michiel Rook started. Being a new driver, it contains some new features as there are no user-space scripts to worry about. Problems: libsensors can't read temperature, I do not know why. Removed: vrm r/w accessor fan_div r/w accessor unused macros Added: chassis intrusion latch clear write-only accessor: echo 1 > ci_clear automatic fan clock divider control, documented in a separate post analog output generalised scaling macros for integer scaling with rounding Changed: measurement cycle no longer reads entire chip, just the 12 measurement values, controls and limits are read on an as-needed basis -- I've noticed an improvement as the chip reads 12 rather 33 single byte values, previous to this change I could notice measurement updating delay on text terminal. decrease measurement lockout from 2 to 3/2 seconds vid report uses external vrm for scaling and does not store copy of vrm. Documentation, further information: http://scatter.mine.nu/lmsensors/adm9240/ Debugged on 2.6.11.7, patch against 2.6.12-rc2-mm3 compile tested (only an adjustment to drivers/i2c/chips/Makefile required) Cheers, Grant. diff -X dontdiff-osdl -Nru linux-2.6.12-rc2-mm3/drivers/i2c/chips/Kconfig linux-2.6.12-rc2-mm3c/drivers/i2c/chips/Kconfig --- linux-2.6.12-rc2-mm3/drivers/i2c/chips/Kconfig 2005-04-11 20:54:56.000000000 +1000 +++ linux-2.6.12-rc2-mm3c/drivers/i2c/chips/Kconfig 2005-04-12 13:54:05.000000000 +1000 @@ -51,6 +51,16 @@ This driver can also be built as a module. If so, the module will be called adm1031. +config SENSORS_ADM9240 + tristate "Analog Devices ADM9240 and compatibles" + depends on I2C && EXPERIMENTAL + select I2C_SENSOR + help + If you say yes here you get support for Analog Devices ADM9240, + Dallas DS1780 and National Semiconductor LM81 sensor chips. + This driver can also be built as a module. If so, the module + will be called adm9240. + config SENSORS_ASB100 tristate "Asus ASB100 Bach" depends on I2C && EXPERIMENTAL diff -X dontdiff-osdl -Nru linux-2.6.12-rc2-mm3/drivers/i2c/chips/Makefile linux-2.6.12-rc2-mm3c/drivers/i2c/chips/Makefile --- linux-2.6.12-rc2-mm3/drivers/i2c/chips/Makefile 2005-04-11 20:54:56.000000000 +1000 +++ linux-2.6.12-rc2-mm3c/drivers/i2c/chips/Makefile 2005-04-12 13:54:05.000000000 +1000 @@ -11,6 +11,7 @@ obj-$(CONFIG_SENSORS_ADM1025) += adm1025.o obj-$(CONFIG_SENSORS_ADM1026) += adm1026.o obj-$(CONFIG_SENSORS_ADM1031) += adm1031.o +obj-$(CONFIG_SENSORS_ADM9240) += adm9240.o obj-$(CONFIG_SENSORS_DS1337) += ds1337.o obj-$(CONFIG_SENSORS_DS1621) += ds1621.o obj-$(CONFIG_SENSORS_EEPROM) += eeprom.o diff -X dontdiff-osdl -Nru linux-2.6.12-rc2-mm3/drivers/i2c/chips/adm9240.c linux-2.6.12-rc2-mm3c/drivers/i2c/chips/adm9240.c --- linux-2.6.12-rc2-mm3/drivers/i2c/chips/adm9240.c 1970-01-01 10:00:00.000000000 +1000 +++ linux-2.6.12-rc2-mm3c/drivers/i2c/chips/adm9240.c 2005-04-12 14:17:21.000000000 +1000 @@ -0,0 +1,726 @@ +/* + * adm9240.c Part of lm_sensors, Linux kernel modules for hardware + * monitoring + * + * Copyright (C) 1999 Frodo Looijaard <frodol at dds.nl> + * Philip Edelbrock <phil at netroedge.com> + * Copyright (C) 2003 Michiel Rook <michiel at grendelproject.nl> + * Copyright (C) 2005 Grant Coady <gcoady at gmail.com> with valuable + * guidance from Jean Delvare + * + * Driver supports Analog Devices ADM9240 + * Dallas Semiconductor DS1780 + * National Semiconductor LM81 + * + * ADM9240 is the reference, DS1780 and LM81 are register compatibles + * + * Yes, this driver has no fan clock divider r/w accessor: automagical + * LM81 extended temp reading not implemented + * + * 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/config.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/i2c-sensor.h> +#include <linux/i2c-vid.h> + +/* Addresses to scan */ +static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END }; + +static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END }; + +/* Insmod parameters */ +SENSORS_INSMOD_3(adm9240, ds1780, lm81); + +/* ADM9240 registers */ +#define ADM9240_REG_MAN_ID 0x3e +#define ADM9240_REG_DIE_REV 0x3f +#define ADM9240_REG_CONFIG 0x40 + +#define ADM9240_REG_IN(nr) (0x20 + (nr)) /* 0..5 */ +#define ADM9240_REG_IN_MAX(nr) (0x2b + (nr) * 2) +#define ADM9240_REG_IN_MIN(nr) (0x2c + (nr) * 2) +#define ADM9240_REG_FAN(nr) (0x28 + (nr)) /* 0..1 */ +#define ADM9240_REG_FAN_MIN(nr) (0x3b + (nr)) +#define ADM9240_REG_INT(nr) (0x41 + (nr)) +#define ADM9240_REG_INT_MASK(nr) (0x43 + (nr)) +#define ADM9240_REG_TEMP 0x27 +#define ADM9240_REG_TEMP_HIGH 0x39 +#define ADM9240_REG_TEMP_HYST 0x3a +#define ADM9240_REG_ANALOG_OUT 0x19 +#define ADM9240_REG_CHASSIS_CLEAR 0x46 +#define ADM9240_REG_VID_FAN_DIV 0x47 +#define ADM9240_REG_I2C_ADDR 0x48 +#define ADM9240_REG_VID4 0x49 +#define ADM9240_REG_TEMP_CONF 0x4b + +/* generalised integer scaling with rounding (value, multiplier, divisor) */ +#define USCALE(v,m,d) (((m) * (v) + (d) / 2) / (d)) +#define SCALE(v,m,d) ((v) < 0 ? ((m) * (v) - (d) / 2) / (d) : \ + ((m) * (v) + (d) / 2) / (d)) + +/* adm9240 does internal voltage scaling */ +static const u16 nom[6] = {2500, 2700, 3300, 5000, 12000, 2700}; + +#define IN_FROM_REG(reg,n) (USCALE((reg), nom[n], 192)) +#define IN_TO_REG(val,n) (SENSORS_LIMIT(\ + USCALE((val), 192, nom[n]), 0, 255)) + +/* temperature limits clamped to chip -ve = -40, 127 = disable */ +#define TEMP_TO_REG(val) (SENSORS_LIMIT(\ + SCALE((val), 1, 1000), -40, 127)) + +/* two fans, -1 for fan or fan_min too slow, 99999 for fan_min too fast */ +#define FAN_FROM_REG(reg,div) ((reg) == 255 ? 0 : (reg) == 0 ? 99999 : \ + USCALE(1350000, 1, (reg) * (div))) + +/* analog out */ +#define AOUT_TO_REG(val) (SENSORS_LIMIT(\ + SCALE((val), 255, 1250), 0, 255)) + +/* interface */ +static int adm9240_attach_adapter(struct i2c_adapter *adapter); +static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind); +static void adm9240_init_client(struct i2c_client *client); +static int adm9240_detach_client(struct i2c_client *client); +static struct adm9240_data *adm9240_update_device(struct device *dev); + +/* driver data */ +static struct i2c_driver adm9240_driver = { + .owner = THIS_MODULE, + .name = "adm9240", + .id = I2C_DRIVERID_ADM9240, + .flags = I2C_DF_NOTIFY, + .attach_adapter = adm9240_attach_adapter, + .detach_client = adm9240_detach_client, +}; + +/* per client data */ +struct adm9240_data { + enum chips type; + struct i2c_client client; + struct semaphore update_lock; + char valid; + unsigned long last_updated; + + u8 in[6]; /* ro in0_input */ + u8 in_max[6]; /* rw in0_max */ + u8 in_min[6]; /* rw in0_min */ + u8 fan[2]; /* ro fan1_input */ + u8 fan_min[2]; /* rw fan1_min */ + u8 fan_div[2]; /* rw fan1_div, not exposed to user */ + s16 temp; /* ro temp1_input */ + s8 temp_high; /* rw temp1_max */ + s8 temp_hyst; /* rw temp1_max_hyst */ + u8 alarms[2]; /* ro alarms */ + u8 alarms_mask[2]; /* rw alarms_mask, not exposed to user */ + u8 analog_out; /* rw analog_out */ + u8 vid; /* ro vid (we don't store vrm) */ +}; + +/* i2c byte read/write interface */ +static int adm9240_read_value(struct i2c_client *client, u8 reg) +{ + return i2c_smbus_read_byte_data(client, reg); +} + +static int adm9240_write_value(struct i2c_client *client, u8 reg, u8 value) +{ + return i2c_smbus_write_byte_data(client, reg, value); +} + +/* temperature */ +#define show_temp(value,scale) \ +static ssize_t show_##value(struct device *dev, char *buf) \ +{ \ + struct adm9240_data *data = adm9240_update_device(dev); \ + return sprintf(buf,"%d\n",data->value * scale); \ +} +show_temp(temp_high,1000); +show_temp(temp_hyst,1000); +show_temp(temp,500); + +#define set_temp(value, reg) \ +static ssize_t set_##value(struct device *dev, const char *buf, \ + size_t count) \ +{ \ + struct i2c_client *client = to_i2c_client(dev); \ + struct adm9240_data *data = adm9240_update_device(dev); \ + long temp = simple_strtoul(buf, NULL, 10); \ + \ + down(&data->update_lock); \ + data->value = TEMP_TO_REG(temp); \ + adm9240_write_value(client, reg, data->value); \ + up(&data->update_lock); \ + return count; \ +} +set_temp(temp_high, ADM9240_REG_TEMP_HIGH); +set_temp(temp_hyst, ADM9240_REG_TEMP_HYST); + +static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, + show_temp_high, set_temp_high); +static DEVICE_ATTR(temp1_hyst, S_IWUSR | S_IRUGO, + show_temp_hyst, set_temp_hyst); +static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); + +/* voltage */ +static ssize_t show_in(struct device *dev, char *buf, int nr) +{ + struct adm9240_data *data = adm9240_update_device(dev); + return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr)); +} + +static ssize_t show_in_min(struct device *dev, char *buf, int nr) +{ + struct adm9240_data *data = adm9240_update_device(dev); + return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr)); +} + +static ssize_t show_in_max(struct device *dev, char *buf, int nr) +{ + struct adm9240_data *data = adm9240_update_device(dev); + return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr)); +} + +static ssize_t set_in_min(struct device *dev, const char *buf, + size_t count, int nr) +{ + struct i2c_client *client = to_i2c_client(dev); + struct adm9240_data *data = i2c_get_clientdata(client); + unsigned long val = simple_strtoul(buf, NULL, 10); + + down(&data->update_lock); + data->in_min[nr] = IN_TO_REG(val, nr); + adm9240_write_value(client, ADM9240_REG_IN_MIN(nr), data->in_min[nr]); + up(&data->update_lock); + return count; +} + +static ssize_t set_in_max(struct device *dev, const char *buf, + size_t count, int nr) +{ + struct i2c_client *client = to_i2c_client(dev); + struct adm9240_data *data = i2c_get_clientdata(client); + unsigned long val = simple_strtoul(buf, NULL, 10); + + down(&data->update_lock); + data->in_max[nr] = IN_TO_REG(val, nr); + adm9240_write_value(client, ADM9240_REG_IN_MAX(nr), data->in_max[nr]); + up(&data->update_lock); + return count; +} + +#define show_in_offset(offset) \ +static ssize_t show_in##offset(struct device *dev, char *buf) \ +{ \ + return show_in(dev, buf, offset); \ +} \ +static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL); \ +static ssize_t show_in##offset##_min(struct device *dev, char *buf) \ +{ \ + return show_in_min(dev, buf, offset); \ +} \ +static ssize_t show_in##offset##_max(struct device *dev, char *buf) \ +{ \ + return show_in_max(dev, buf, offset); \ +} \ +static ssize_t \ +set_in##offset##_min(struct device *dev, const char *buf, size_t count) \ +{ \ + return set_in_min(dev, buf, count, offset); \ +} \ +static ssize_t \ +set_in##offset##_max(struct device *dev, const char *buf, size_t count) \ +{ \ + return set_in_max(dev, buf, count, offset); \ +} \ +static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ + show_in##offset##_min, set_in##offset##_min); \ +static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ + show_in##offset##_max, set_in##offset##_max); + +show_in_offset(0); +show_in_offset(1); +show_in_offset(2); +show_in_offset(3); +show_in_offset(4); +show_in_offset(5); + +/* fans */ +static ssize_t show_fan(struct device *dev, char *buf, int nr) +{ + struct adm9240_data *data = adm9240_update_device(dev); + return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr], + 1 << data->fan_div[nr])); +} + +static ssize_t show_fan_min(struct device *dev, char *buf, int nr) +{ + struct adm9240_data *data = adm9240_update_device(dev); + return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan_min[nr], + 1 << data->fan_div[nr])); +} + +/* this function assumes caller holds data->update_lock */ +static void adm9240_write_fan_div(struct i2c_client *client, + int nr, u8 fan_div) +{ + u8 reg, old; + + reg = adm9240_read_value(client, ADM9240_REG_VID_FAN_DIV); + if (nr == 0) { + old = (reg >> 4) & 3; + reg &= 0xcf; + reg |= (fan_div << 4); + } else { + old = (reg >> 6) & 3; + reg &= 0x3f; + reg |= (fan_div << 6); + } + adm9240_write_value(client, ADM9240_REG_VID_FAN_DIV, reg); + dev_dbg(&client->dev, "autoX: fan %u, old %u, new %u, div changed" + "\n", nr + 1, 1 << old, 1 << fan_div); +} + +/* + * automatic fan clock divider support + * + * Algorithm: after sanity checking user input for something to work with, + * calculate a new fan divider. It may need an adjustment stay in working + * range. Only set new fan divisor on change. Always set new fan_min. + * + * Calibration: The 'magic' value is selected to be at the high RPM end + * of optimum fan clock divider value. The optimum fan clock divider is + * one where register values can range from 'magic' to twice that, allowing + * for some fan speed RPM indication below the fan_min alarm point. + * + * Way too low or too high user entry values for fan_min corectly report + * low fan speed alarm, but the reported fan_min will be 0 or 99999. + * This out-of-range fan_min condition enables the fan speed measurement + * logic to adjust fan clock divider upwards on measurement overflow. + * + * Note: this code interacts with fan and fan_min reporting macro and the + * fan speed measurement cycle. Changes to fan divider are reported by + * adm9240_write_fan_div() to debug log. Heavily instrumented for testing + * the algorithm. + */ +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 adm9240_data *data = i2c_get_clientdata(client); + unsigned long val = simple_strtoul(buf, NULL, 10); + const u8 magic = 96; + + down(&data->update_lock); + + dev_dbg(&client->dev, "auto1: fan %u, div %u, min %u, val %ld, " + "spd %u\n", nr + 1, 1 << data->fan_div[nr], + data->fan_min[nr], val, data->fan[nr]); + + if (val <= 1350000 / (8 * 254)) { + data->fan_min[nr] = 255; /* too slow, disable alarm */ + + dev_dbg(&client->dev, "auto2: fan %u, div %u, min %u, " + "final\n", nr + 1, + 1 << data->fan_div[nr], + data->fan_min[nr]); + + } else if (val >= 1350000 / magic) { + data->fan_min[nr] = 0; /* too fast, assert alarm */ + + dev_dbg(&client->dev, "auto3: fan %u, div %u, min %u, " + "final\n", nr + 1, + 1 << data->fan_div[nr], + data->fan_min[nr]); + + } else { + unsigned int new_min = 1350004U / (val * 8); + u8 new_div = 3; + + while (new_min < magic * 2 && new_div > 0) { + new_div--; + new_min <<= 1; + } + + dev_dbg(&client->dev, "auto4: fan %u, div %u, min %u\n", + nr + 1, 1 << new_div, new_min); + + /* perhaps back one step for optimal divider */ + if (new_div < 3 && new_min >= magic * 2) { + new_div++; + new_min++; + new_min >>= 1; + } + + dev_dbg(&client->dev, "auto5: fan %u, div %u, min %u, " + "final\n", nr + 1, 1 << new_div, + new_min); + + data->fan_min[nr] = new_min; + + if (new_div != data->fan_div[nr]) { + data->fan_div[nr] = new_div; + adm9240_write_fan_div(client, nr, new_div); + } + } + + adm9240_write_value(client, ADM9240_REG_FAN_MIN(nr), + data->fan_min[nr]); + + up(&data->update_lock); + return count; +} + +#define show_fan_offset(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 set_fan_##offset##_min (struct device *dev, \ +const char *buf, size_t count) \ +{ \ +return set_fan_min(dev, buf, count, offset - 1); \ +} \ +static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ + show_fan_##offset, NULL); \ +static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ + show_fan_##offset##_min, set_fan_##offset##_min); + +show_fan_offset(1); +show_fan_offset(2); + +/* alarms */ +static ssize_t show_alarms(struct device *dev, char *buf) +{ + struct adm9240_data *data = adm9240_update_device(dev); + return sprintf(buf, "%d\n", data->alarms[0] | + (data->alarms[1] << 8)); +} +static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); + +/* vid */ +static ssize_t show_vid(struct device *dev, char *buf) +{ + struct adm9240_data *data = adm9240_update_device(dev); + return sprintf(buf, "%d\n", vid_from_reg(data->vid, i2c_which_vrm())); +} +static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); + +/* analog output */ +static ssize_t show_aout(struct device *dev, char *buf) +{ + struct adm9240_data *data = adm9240_update_device(dev); + return sprintf(buf, "%d\n", USCALE(data->analog_out, 1250, 255)); +} + +static ssize_t set_aout(struct device *dev, const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + struct adm9240_data *data = i2c_get_clientdata(client); + long val = simple_strtol(buf, NULL, 10); /* keep signed */ + + down(&data->update_lock); + data->analog_out = AOUT_TO_REG(val); + adm9240_write_value(client, ADM9240_REG_ANALOG_OUT, data->analog_out); + up(&data->update_lock); + return count; +} +static DEVICE_ATTR(analog_out, S_IRUGO | S_IWUSR, show_aout, set_aout); + +/* chassis intrusion latch clear */ +static ssize_t set_ci_clear(struct device *dev, const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + unsigned long val = simple_strtol(buf, NULL, 10); + + if (val == 1) + adm9240_write_value(client, ADM9240_REG_CHASSIS_CLEAR, 0x80); + + return count; +} +static DEVICE_ATTR(ci_clear, S_IWUSR, NULL, set_ci_clear); + +/* sensor chip detection */ +static int adm9240_detect(struct i2c_adapter *adapter, int address, int kind) +{ + struct i2c_client *new_client; + struct adm9240_data *data; + int err = 0; + const char *name = ""; + u8 man_id, die_rev, config; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + goto exit; + + if (!(data = kmalloc(sizeof(struct adm9240_data), GFP_KERNEL))) { + err = -ENOMEM; + goto exit; + } + memset(data, 0, sizeof(struct adm9240_data)); + + new_client = &data->client; + i2c_set_clientdata(new_client, data); + new_client->addr = address; + new_client->adapter = adapter; + new_client->driver = &adm9240_driver; + new_client->flags = 0; + + if (kind == 0) { + kind = adm9240; + dev_dbg(&adapter->dev, "detect forced\n"); + } + + if (kind < 0) { + + /* verify chip: reg address should match i2c address */ + if (adm9240_read_value(new_client, ADM9240_REG_I2C_ADDR) + != address) { + dev_dbg(&adapter->dev, "detect fail: address match, " + "0x%02x\n", address); + goto exit_free; + } + + /* check known chip manufacturer */ + man_id = adm9240_read_value(new_client, ADM9240_REG_MAN_ID); + + if (man_id == 0x23) { + kind = adm9240; + } else if (man_id == 0xda) { + kind = ds1780; + } else if (man_id == 0x01) { + kind = lm81; + } else { + dev_dbg(&adapter->dev, "detect fail: unknown manuf, " + "0x%02x\n", man_id); + goto exit_free; + } + + /* successful detect, print chip info */ + die_rev = adm9240_read_value(new_client, ADM9240_REG_DIE_REV); + config = adm9240_read_value(new_client, ADM9240_REG_CONFIG); + dev_info(&adapter->dev, "found: man_id=0x%02X, " + "die_rev=0x%02X, " + "config=0x%02X\n", + man_id, die_rev, config); + } + + /* either forced or detected chip kind */ + if (kind == adm9240) { + name = "adm9240"; + } else if (kind == ds1780) { + name = "ds1780"; + } else if (kind == lm81) { + name = "lm81"; + } + + /* fill in the remaining client fields and attach */ + strlcpy(new_client->name, name, I2C_NAME_SIZE); + data->type = kind; + init_MUTEX(&data->update_lock); + if ((err = i2c_attach_client(new_client))) + goto exit_free; + + adm9240_init_client(new_client); + + /* populate sysfs filesystem */ + device_create_file(&new_client->dev, &dev_attr_in0_input); + device_create_file(&new_client->dev, &dev_attr_in0_min); + device_create_file(&new_client->dev, &dev_attr_in0_max); + device_create_file(&new_client->dev, &dev_attr_in1_input); + device_create_file(&new_client->dev, &dev_attr_in1_min); + device_create_file(&new_client->dev, &dev_attr_in1_max); + device_create_file(&new_client->dev, &dev_attr_in2_input); + device_create_file(&new_client->dev, &dev_attr_in2_min); + device_create_file(&new_client->dev, &dev_attr_in2_max); + device_create_file(&new_client->dev, &dev_attr_in3_input); + device_create_file(&new_client->dev, &dev_attr_in3_min); + device_create_file(&new_client->dev, &dev_attr_in3_max); + device_create_file(&new_client->dev, &dev_attr_in4_input); + device_create_file(&new_client->dev, &dev_attr_in4_min); + device_create_file(&new_client->dev, &dev_attr_in4_max); + device_create_file(&new_client->dev, &dev_attr_in5_input); + device_create_file(&new_client->dev, &dev_attr_in5_min); + device_create_file(&new_client->dev, &dev_attr_in5_max); + device_create_file(&new_client->dev, &dev_attr_temp1_max); + device_create_file(&new_client->dev, &dev_attr_temp1_hyst); + device_create_file(&new_client->dev, &dev_attr_temp1_input); + device_create_file(&new_client->dev, &dev_attr_fan1_input); + device_create_file(&new_client->dev, &dev_attr_fan1_min); + device_create_file(&new_client->dev, &dev_attr_fan2_input); + device_create_file(&new_client->dev, &dev_attr_fan2_min); + device_create_file(&new_client->dev, &dev_attr_cpu0_vid); + device_create_file(&new_client->dev, &dev_attr_analog_out); + device_create_file(&new_client->dev, &dev_attr_ci_clear); + device_create_file(&new_client->dev, &dev_attr_alarms); + + return 0; + +exit_free: + kfree(new_client); +exit: + return err; +} + +static int adm9240_attach_adapter(struct i2c_adapter *adapter) +{ + if (!(adapter->class & I2C_CLASS_HWMON)) + return 0; + return i2c_detect(adapter, &addr_data, adm9240_detect); +} + +static int adm9240_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(i2c_get_clientdata(client)); + return 0; +} + +static void adm9240_init_client(struct i2c_client *client) +{ + u8 config = adm9240_read_value(client, ADM9240_REG_CONFIG); + + if (config & 1) { /* chip is running, no touch */ + dev_dbg(&client->dev, "%s running, config is 0x%02x\n", + client->name, config); + } else { + /* chip not running, set comparator mode */ + adm9240_write_value(client, ADM9240_REG_TEMP_CONF, 0x02); + + /* this goes last, no interrupt, start measurement cycle */ + adm9240_write_value(client, ADM9240_REG_CONFIG, 0x01); + dev_dbg(&client->dev, "%s stopped, starting comparator mode\n", + client->name); + } +} + +static struct adm9240_data *adm9240_update_device(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct adm9240_data *data = i2c_get_clientdata(client); + u8 i; + + down(&data->update_lock); + + /* only take measurement readings */ + if (time_after(jiffies, data->last_updated + (HZ * 3 / 2)) + || !data->valid) { + + for (i = 0; i < 6; i++) /* read voltages */ + { + data->in[i] = adm9240_read_value(client, + ADM9240_REG_IN(i)); + } + + for (i = 0; i < 2; i++) /* read fans and alarms */ + { + data->fan[i] = adm9240_read_value(client, + ADM9240_REG_FAN(i)); + + /* adjust fan clock div on overflow, if no fan_min */ + if (data->fan[i] == 255 && data->fan_div[i] < 3 && + (data->fan_min[i] == 255 || + data->fan_min[i] == 0)) { + + data->fan_div[i]++; + adm9240_write_fan_div(client, i, + data->fan_div[i]); + } + + data->alarms[i] = adm9240_read_value(client, + ADM9240_REG_INT(i)); + } + /* + * Read temperature, assume temperature changes less than + * 0.5'C per two measurement cycles thus ignore possible + * aliasing error on lsb reading. + */ + data->temp = ((adm9240_read_value(client, + ADM9240_REG_TEMP) << 8) | + adm9240_read_value(client, + ADM9240_REG_TEMP_CONF)) / 128; + data->last_updated = jiffies; + } + + /* only read settings on startup, read as required from then on */ + if (!data->valid) { + + for (i = 0; i < 6; i++) + { + data->in_min[i] = adm9240_read_value(client, + ADM9240_REG_IN_MIN(i)); + data->in_max[i] = adm9240_read_value(client, + ADM9240_REG_IN_MAX(i)); + } + for (i = 0; i < 2; i++) + { + data->fan_min[i] = adm9240_read_value(client, + ADM9240_REG_FAN_MIN(i)); + data->alarms_mask[i] = adm9240_read_value(client, + ADM9240_REG_INT_MASK(i)); + } + data->temp_high = adm9240_read_value(client, + ADM9240_REG_TEMP_HIGH); + data->temp_hyst = adm9240_read_value(client, + ADM9240_REG_TEMP_HYST); + + /* read fan divs and 5-bit VID */ + i = adm9240_read_value(client,ADM9240_REG_VID_FAN_DIV); + data->fan_div[0] = (i >> 4) & 0x03; + data->fan_div[1] = (i >> 6) & 0x03; + data->vid = i & 0x0f; + data->vid |= (adm9240_read_value(client, ADM9240_REG_VID4) + & 0x01) << 4; + /* read analog out */ + data->analog_out = adm9240_read_value(client, + ADM9240_REG_ANALOG_OUT); + data->valid = 1; + } + up(&data->update_lock); + return data; +} + +static int __init sensors_adm9240_init(void) +{ + return i2c_add_driver(&adm9240_driver); +} + +static void __exit sensors_adm9240_exit(void) +{ + i2c_del_driver(&adm9240_driver); +} + +MODULE_AUTHOR("Michiel Rook <michiel at grendelproject.nl> and " + "Grant Coady <gcoady at gmail.com>"); +MODULE_DESCRIPTION("ADM9240 driver"); +MODULE_LICENSE("GPL"); + +module_init(sensors_adm9240_init); +module_exit(sensors_adm9240_exit);
