diff options
Diffstat (limited to 'drivers/i2c/chips/asb100.c')
| -rw-r--r-- | drivers/i2c/chips/asb100.c | 1066 |
1 files changed, 1066 insertions, 0 deletions
diff --git a/drivers/i2c/chips/asb100.c b/drivers/i2c/chips/asb100.c new file mode 100644 index 000000000000..7f899002bc54 --- /dev/null +++ b/drivers/i2c/chips/asb100.c @@ -0,0 +1,1066 @@ +/* + 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 +*/ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/i2c-sensor.h> +#include <linux/i2c-vid.h> +#include <linux/init.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[] = { 0x2d, I2C_CLIENT_END }; + +/* ISA addresses to scan (none) */ +static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END }; + +/* 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 + 8) / 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 i2c_client client; + 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); \ + \ + down(&data->update_lock); \ + data->in_##reg[nr] = IN_TO_REG(val); \ + asb100_write_value(client, ASB100_REG_IN_##REG(nr), \ + data->in_##reg[nr]); \ + up(&data->update_lock); \ + 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, 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); + +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##offset##_input); \ + device_create_file(&client->dev, &dev_attr_in##offset##_min); \ + device_create_file(&client->dev, &dev_attr_in##offset##_max); \ +} 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); + + down(&data->update_lock); + 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]); + up(&data->update_lock); + 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; + unsigned long val = simple_strtoul(buf, NULL, 10); + int reg; + + down(&data->update_lock); + + min = FAN_FROM_REG(data->fan_min[nr], + DIV_FROM_REG(data->fan_div[nr])); + 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]); + + up(&data->update_lock); + + 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##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); \ +static DEVICE_ATTR(fan##offset##_div, 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##offset##_input); \ + device_create_file(&client->dev, &dev_attr_fan##offset##_min); \ + device_create_file(&client->dev, &dev_attr_fan##offset##_div); \ +} 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); \ + \ + down(&data->update_lock); \ + 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+1), \ + data->reg[nr]); \ + up(&data->update_lock); \ + 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##num##_input, 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##num##_max, 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##num##_max_hyst, 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##num##_input); \ + device_create_file(&client->dev, &dev_attr_temp##num##_max); \ + device_create_file(&client->dev, &dev_attr_temp##num##_max_hyst); \ +} 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(cpu0_vid, S_IRUGO, show_vid, NULL); +#define device_create_file_vid(client) \ +device_create_file(&client->dev, &dev_attr_cpu0_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); + + down(&data->update_lock); + data->pwm &= 0x80; /* keep the enable bit */ + data->pwm |= (0x0f & ASB100_PWM_TO_REG(val)); + asb100_write_value(client, ASB100_REG_PWM1, data->pwm); + up(&data->update_lock); + 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); + + down(&data->update_lock); + data->pwm &= 0x0f; /* keep the duty cycle bits */ + data->pwm |= (val ? 0x80 : 0x00); + asb100_write_value(client, ASB100_REG_PWM1, data->pwm); + up(&data->update_lock); + return count; +} + +static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1); +static DEVICE_ATTR(pwm1_enable, 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_pwm1_enable); \ +} 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_CLASS_HWMON)) + 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 (!(data = kmalloc(sizeof(struct asb100_data), GFP_KERNEL))) { + pr_debug("asb100.o: detect failed, kmalloc failed!\n"); + err = -ENOMEM; + goto ERROR0; + } + memset(data, 0, sizeof(struct asb100_data)); + + new_client = &data->client; + 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); + + /* A few vars need to be filled upon startup */ + data->fan_min[0] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(0)); + data->fan_min[1] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(1)); + data->fan_min[2] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(2)); + + /* 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(data); +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; + } + + if (i2c_get_clientdata(client)==NULL) { + /* subclients */ + kfree(client); + } else { + /* main client */ + kfree(i2c_get_clientdata(client)); + } + + return 0; +} + +/* 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 = swab16(i2c_smbus_read_word_data (cl, 0)); + break; + case 0x52: /* CONFIG */ + res = i2c_smbus_read_byte_data(cl, 1); + break; + case 0x53: /* HYST */ + res = swab16(i2c_smbus_read_word_data (cl, 2)); + break; + case 0x55: /* MAX */ + default: + res = swab16(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, swab16(value)); + break; + case 0x55: /* MAX */ + i2c_smbus_write_word_data(cl, 3, swab16(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 = i2c_which_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 + HZ + HZ / 2) + || !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) +{ + 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); + |