diff options
Diffstat (limited to 'kernel/drivers/hwmon/sis5595.c')
| -rw-r--r-- | kernel/drivers/hwmon/sis5595.c | 932 |
1 files changed, 932 insertions, 0 deletions
diff --git a/kernel/drivers/hwmon/sis5595.c b/kernel/drivers/hwmon/sis5595.c new file mode 100644 index 000000000..45a028fb8 --- /dev/null +++ b/kernel/drivers/hwmon/sis5595.c @@ -0,0 +1,932 @@ +/* + * sis5595.c - Part of lm_sensors, Linux kernel modules + * for hardware monitoring + * + * Copyright (C) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>, + * Kyösti Mälkki <kmalkki@cc.hut.fi>, and + * Mark D. Studebaker <mdsxyz123@yahoo.com> + * Ported to Linux 2.6 by Aurelien Jarno <aurelien@aurel32.net> with + * the help of Jean Delvare <jdelvare@suse.de> + * + * 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. + */ + +/* + * SiS southbridge has a LM78-like chip integrated on the same IC. + * This driver is a customized copy of lm78.c + * + * Supports following revisions: + * Version PCI ID PCI Revision + * 1 1039/0008 AF or less + * 2 1039/0008 B0 or greater + * + * Note: these chips contain a 0008 device which is incompatible with the + * 5595. We recognize these by the presence of the listed + * "blacklist" PCI ID and refuse to load. + * + * NOT SUPPORTED PCI ID BLACKLIST PCI ID + * 540 0008 0540 + * 550 0008 0550 + * 5513 0008 5511 + * 5581 0008 5597 + * 5582 0008 5597 + * 5597 0008 5597 + * 5598 0008 5597/5598 + * 630 0008 0630 + * 645 0008 0645 + * 730 0008 0730 + * 735 0008 0735 + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/ioport.h> +#include <linux/pci.h> +#include <linux/platform_device.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/jiffies.h> +#include <linux/mutex.h> +#include <linux/sysfs.h> +#include <linux/acpi.h> +#include <linux/io.h> + + +/* + * If force_addr is set to anything different from 0, we forcibly enable + * the device at the given address. + */ +static u16 force_addr; +module_param(force_addr, ushort, 0); +MODULE_PARM_DESC(force_addr, + "Initialize the base address of the sensors"); + +static struct platform_device *pdev; + +/* Many SIS5595 constants specified below */ + +/* Length of ISA address segment */ +#define SIS5595_EXTENT 8 +/* PCI Config Registers */ +#define SIS5595_BASE_REG 0x68 +#define SIS5595_PIN_REG 0x7A +#define SIS5595_ENABLE_REG 0x7B + +/* Where are the ISA address/data registers relative to the base address */ +#define SIS5595_ADDR_REG_OFFSET 5 +#define SIS5595_DATA_REG_OFFSET 6 + +/* The SIS5595 registers */ +#define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2) +#define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2) +#define SIS5595_REG_IN(nr) (0x20 + (nr)) + +#define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr)) +#define SIS5595_REG_FAN(nr) (0x28 + (nr)) + +/* + * On the first version of the chip, the temp registers are separate. + * On the second version, + * TEMP pin is shared with IN4, configured in PCI register 0x7A. + * The registers are the same as well. + * OVER and HYST are really MAX and MIN. + */ + +#define REV2MIN 0xb0 +#define SIS5595_REG_TEMP (((data->revision) >= REV2MIN) ? \ + SIS5595_REG_IN(4) : 0x27) +#define SIS5595_REG_TEMP_OVER (((data->revision) >= REV2MIN) ? \ + SIS5595_REG_IN_MAX(4) : 0x39) +#define SIS5595_REG_TEMP_HYST (((data->revision) >= REV2MIN) ? \ + SIS5595_REG_IN_MIN(4) : 0x3a) + +#define SIS5595_REG_CONFIG 0x40 +#define SIS5595_REG_ALARM1 0x41 +#define SIS5595_REG_ALARM2 0x42 +#define SIS5595_REG_FANDIV 0x47 + +/* + * Conversions. Limit checking is only done on the TO_REG + * variants. + */ + +/* + * IN: mV, (0V to 4.08V) + * REG: 16mV/bit + */ +static inline u8 IN_TO_REG(unsigned long val) +{ + unsigned long nval = clamp_val(val, 0, 4080); + return (nval + 8) / 16; +} +#define IN_FROM_REG(val) ((val) * 16) + +static inline u8 FAN_TO_REG(long rpm, int div) +{ + if (rpm <= 0) + return 255; + if (rpm > 1350000) + return 1; + return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254); +} + +static inline int FAN_FROM_REG(u8 val, int div) +{ + return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div); +} + +/* + * TEMP: mC (-54.12C to +157.53C) + * REG: 0.83C/bit + 52.12, two's complement + */ +static inline int TEMP_FROM_REG(s8 val) +{ + return val * 830 + 52120; +} +static inline s8 TEMP_TO_REG(long val) +{ + int nval = clamp_val(val, -54120, 157530) ; + return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830; +} + +/* + * FAN DIV: 1, 2, 4, or 8 (defaults to 2) + * REG: 0, 1, 2, or 3 (respectively) (defaults to 1) + */ +static inline u8 DIV_TO_REG(int val) +{ + return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1; +} +#define DIV_FROM_REG(val) (1 << (val)) + +/* + * For each registered chip, we need to keep some data in memory. + * The structure is dynamically allocated. + */ +struct sis5595_data { + unsigned short addr; + const char *name; + struct device *hwmon_dev; + struct mutex lock; + + struct mutex update_lock; + char valid; /* !=0 if following fields are valid */ + unsigned long last_updated; /* In jiffies */ + char maxins; /* == 3 if temp enabled, otherwise == 4 */ + u8 revision; /* Reg. value */ + + u8 in[5]; /* Register value */ + u8 in_max[5]; /* Register value */ + u8 in_min[5]; /* Register value */ + u8 fan[2]; /* Register value */ + u8 fan_min[2]; /* Register value */ + s8 temp; /* Register value */ + s8 temp_over; /* Register value */ + s8 temp_hyst; /* Register value */ + u8 fan_div[2]; /* Register encoding, shifted right */ + u16 alarms; /* Register encoding, combined */ +}; + +static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */ + +static int sis5595_probe(struct platform_device *pdev); +static int sis5595_remove(struct platform_device *pdev); + +static int sis5595_read_value(struct sis5595_data *data, u8 reg); +static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value); +static struct sis5595_data *sis5595_update_device(struct device *dev); +static void sis5595_init_device(struct sis5595_data *data); + +static struct platform_driver sis5595_driver = { + .driver = { + .name = "sis5595", + }, + .probe = sis5595_probe, + .remove = sis5595_remove, +}; + +/* 4 Voltages */ +static ssize_t show_in(struct device *dev, struct device_attribute *da, + char *buf) +{ + struct sis5595_data *data = sis5595_update_device(dev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + int nr = attr->index; + return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr])); +} + +static ssize_t show_in_min(struct device *dev, struct device_attribute *da, + char *buf) +{ + struct sis5595_data *data = sis5595_update_device(dev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + int nr = attr->index; + return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr])); +} + +static ssize_t show_in_max(struct device *dev, struct device_attribute *da, + char *buf) +{ + struct sis5595_data *data = sis5595_update_device(dev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + int nr = attr->index; + return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr])); +} + +static ssize_t set_in_min(struct device *dev, struct device_attribute *da, + const char *buf, size_t count) +{ + struct sis5595_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + int nr = attr->index; + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + data->in_min[nr] = IN_TO_REG(val); + sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]); + mutex_unlock(&data->update_lock); + return count; +} + +static ssize_t set_in_max(struct device *dev, struct device_attribute *da, + const char *buf, size_t count) +{ + struct sis5595_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + int nr = attr->index; + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + data->in_max[nr] = IN_TO_REG(val); + sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]); + mutex_unlock(&data->update_lock); + return count; +} + +#define show_in_offset(offset) \ +static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ + show_in, NULL, offset); \ +static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \ + show_in_min, set_in_min, offset); \ +static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \ + show_in_max, set_in_max, offset); + +show_in_offset(0); +show_in_offset(1); +show_in_offset(2); +show_in_offset(3); +show_in_offset(4); + +/* Temperature */ +static ssize_t show_temp(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sis5595_data *data = sis5595_update_device(dev); + return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp)); +} + +static ssize_t show_temp_over(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sis5595_data *data = sis5595_update_device(dev); + return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over)); +} + +static ssize_t set_temp_over(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sis5595_data *data = dev_get_drvdata(dev); + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + data->temp_over = TEMP_TO_REG(val); + sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over); + mutex_unlock(&data->update_lock); + return count; +} + +static ssize_t show_temp_hyst(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sis5595_data *data = sis5595_update_device(dev); + return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst)); +} + +static ssize_t set_temp_hyst(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sis5595_data *data = dev_get_drvdata(dev); + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + data->temp_hyst = TEMP_TO_REG(val); + sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst); + mutex_unlock(&data->update_lock); + return count; +} + +static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); +static DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, + show_temp_over, set_temp_over); +static DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR, + show_temp_hyst, set_temp_hyst); + +/* 2 Fans */ +static ssize_t show_fan(struct device *dev, struct device_attribute *da, + char *buf) +{ + struct sis5595_data *data = sis5595_update_device(dev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + int nr = attr->index; + 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, struct device_attribute *da, + char *buf) +{ + struct sis5595_data *data = sis5595_update_device(dev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + int nr = attr->index; + return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr], + DIV_FROM_REG(data->fan_div[nr]))); +} + +static ssize_t set_fan_min(struct device *dev, struct device_attribute *da, + const char *buf, size_t count) +{ + struct sis5595_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + int nr = attr->index; + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr])); + sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]); + mutex_unlock(&data->update_lock); + return count; +} + +static ssize_t show_fan_div(struct device *dev, struct device_attribute *da, + char *buf) +{ + struct sis5595_data *data = sis5595_update_device(dev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + int nr = attr->index; + return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); +} + +/* + * 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 surprise; the user doesn't expect the fan minimum to change just + * because the divisor changed. + */ +static ssize_t set_fan_div(struct device *dev, struct device_attribute *da, + const char *buf, size_t count) +{ + struct sis5595_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + int nr = attr->index; + unsigned long min; + int reg; + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err) + return err; + + mutex_lock(&data->update_lock); + min = FAN_FROM_REG(data->fan_min[nr], + DIV_FROM_REG(data->fan_div[nr])); + reg = sis5595_read_value(data, SIS5595_REG_FANDIV); + + switch (val) { + case 1: + data->fan_div[nr] = 0; + break; + case 2: + data->fan_div[nr] = 1; + break; + case 4: + data->fan_div[nr] = 2; + break; + case 8: + data->fan_div[nr] = 3; + break; + default: + dev_err(dev, + "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", + val); + mutex_unlock(&data->update_lock); + return -EINVAL; + } + + switch (nr) { + case 0: + reg = (reg & 0xcf) | (data->fan_div[nr] << 4); + break; + case 1: + reg = (reg & 0x3f) | (data->fan_div[nr] << 6); + break; + } + sis5595_write_value(data, SIS5595_REG_FANDIV, reg); + data->fan_min[nr] = + FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); + sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]); + mutex_unlock(&data->update_lock); + return count; +} + +#define show_fan_offset(offset) \ +static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \ + show_fan, NULL, offset - 1); \ +static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ + show_fan_min, set_fan_min, offset - 1); \ +static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ + show_fan_div, set_fan_div, offset - 1); + +show_fan_offset(1); +show_fan_offset(2); + +/* Alarms */ +static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sis5595_data *data = sis5595_update_device(dev); + return sprintf(buf, "%d\n", data->alarms); +} +static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); + +static ssize_t show_alarm(struct device *dev, struct device_attribute *da, + char *buf) +{ + struct sis5595_data *data = sis5595_update_device(dev); + int nr = to_sensor_dev_attr(da)->index; + return sprintf(buf, "%u\n", (data->alarms >> nr) & 1); +} +static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); +static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); +static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); +static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); +static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 15); +static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6); +static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7); +static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 15); + +static ssize_t show_name(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sis5595_data *data = dev_get_drvdata(dev); + return sprintf(buf, "%s\n", data->name); +} +static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); + +static struct attribute *sis5595_attributes[] = { + &sensor_dev_attr_in0_input.dev_attr.attr, + &sensor_dev_attr_in0_min.dev_attr.attr, + &sensor_dev_attr_in0_max.dev_attr.attr, + &sensor_dev_attr_in0_alarm.dev_attr.attr, + &sensor_dev_attr_in1_input.dev_attr.attr, + &sensor_dev_attr_in1_min.dev_attr.attr, + &sensor_dev_attr_in1_max.dev_attr.attr, + &sensor_dev_attr_in1_alarm.dev_attr.attr, + &sensor_dev_attr_in2_input.dev_attr.attr, + &sensor_dev_attr_in2_min.dev_attr.attr, + &sensor_dev_attr_in2_max.dev_attr.attr, + &sensor_dev_attr_in2_alarm.dev_attr.attr, + &sensor_dev_attr_in3_input.dev_attr.attr, + &sensor_dev_attr_in3_min.dev_attr.attr, + &sensor_dev_attr_in3_max.dev_attr.attr, + &sensor_dev_attr_in3_alarm.dev_attr.attr, + + &sensor_dev_attr_fan1_input.dev_attr.attr, + &sensor_dev_attr_fan1_min.dev_attr.attr, + &sensor_dev_attr_fan1_div.dev_attr.attr, + &sensor_dev_attr_fan1_alarm.dev_attr.attr, + &sensor_dev_attr_fan2_input.dev_attr.attr, + &sensor_dev_attr_fan2_min.dev_attr.attr, + &sensor_dev_attr_fan2_div.dev_attr.attr, + &sensor_dev_attr_fan2_alarm.dev_attr.attr, + + &dev_attr_alarms.attr, + &dev_attr_name.attr, + NULL +}; + +static const struct attribute_group sis5595_group = { + .attrs = sis5595_attributes, +}; + +static struct attribute *sis5595_attributes_in4[] = { + &sensor_dev_attr_in4_input.dev_attr.attr, + &sensor_dev_attr_in4_min.dev_attr.attr, + &sensor_dev_attr_in4_max.dev_attr.attr, + &sensor_dev_attr_in4_alarm.dev_attr.attr, + NULL +}; + +static const struct attribute_group sis5595_group_in4 = { + .attrs = sis5595_attributes_in4, +}; + +static struct attribute *sis5595_attributes_temp1[] = { + &dev_attr_temp1_input.attr, + &dev_attr_temp1_max.attr, + &dev_attr_temp1_max_hyst.attr, + &sensor_dev_attr_temp1_alarm.dev_attr.attr, + NULL +}; + +static const struct attribute_group sis5595_group_temp1 = { + .attrs = sis5595_attributes_temp1, +}; + +/* This is called when the module is loaded */ +static int sis5595_probe(struct platform_device *pdev) +{ + int err = 0; + int i; + struct sis5595_data *data; + struct resource *res; + char val; + + /* Reserve the ISA region */ + res = platform_get_resource(pdev, IORESOURCE_IO, 0); + if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT, + sis5595_driver.driver.name)) + return -EBUSY; + + data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data), + GFP_KERNEL); + if (!data) + return -ENOMEM; + + mutex_init(&data->lock); + mutex_init(&data->update_lock); + data->addr = res->start; + data->name = "sis5595"; + platform_set_drvdata(pdev, data); + + /* + * Check revision and pin registers to determine whether 4 or 5 voltages + */ + data->revision = s_bridge->revision; + /* 4 voltages, 1 temp */ + data->maxins = 3; + if (data->revision >= REV2MIN) { + pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val); + if (!(val & 0x80)) + /* 5 voltages, no temps */ + data->maxins = 4; + } + + /* Initialize the SIS5595 chip */ + sis5595_init_device(data); + + /* A few vars need to be filled upon startup */ + for (i = 0; i < 2; i++) { + data->fan_min[i] = sis5595_read_value(data, + SIS5595_REG_FAN_MIN(i)); + } + + /* Register sysfs hooks */ + err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group); + if (err) + return err; + if (data->maxins == 4) { + err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4); + if (err) + goto exit_remove_files; + } else { + err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1); + if (err) + goto exit_remove_files; + } + + data->hwmon_dev = hwmon_device_register(&pdev->dev); + if (IS_ERR(data->hwmon_dev)) { + err = PTR_ERR(data->hwmon_dev); + goto exit_remove_files; + } + + return 0; + +exit_remove_files: + sysfs_remove_group(&pdev->dev.kobj, &sis5595_group); + sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4); + sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1); + return err; +} + +static int sis5595_remove(struct platform_device *pdev) +{ + struct sis5595_data *data = platform_get_drvdata(pdev); + + hwmon_device_unregister(data->hwmon_dev); + sysfs_remove_group(&pdev->dev.kobj, &sis5595_group); + sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4); + sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1); + + return 0; +} + + +/* ISA access must be locked explicitly. */ +static int sis5595_read_value(struct sis5595_data *data, u8 reg) +{ + int res; + + mutex_lock(&data->lock); + outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET); + res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET); + mutex_unlock(&data->lock); + return res; +} + +static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value) +{ + mutex_lock(&data->lock); + outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET); + outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET); + mutex_unlock(&data->lock); +} + +/* Called when we have found a new SIS5595. */ +static void sis5595_init_device(struct sis5595_data *data) +{ + u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG); + if (!(config & 0x01)) + sis5595_write_value(data, SIS5595_REG_CONFIG, + (config & 0xf7) | 0x01); +} + +static struct sis5595_data *sis5595_update_device(struct device *dev) +{ + struct sis5595_data *data = dev_get_drvdata(dev); + int i; + + mutex_lock(&data->update_lock); + + if (time_after(jiffies, data->last_updated + HZ + HZ / 2) + || !data->valid) { + + for (i = 0; i <= data->maxins; i++) { + data->in[i] = + sis5595_read_value(data, SIS5595_REG_IN(i)); + data->in_min[i] = + sis5595_read_value(data, + SIS5595_REG_IN_MIN(i)); + data->in_max[i] = + sis5595_read_value(data, + SIS5595_REG_IN_MAX(i)); + } + for (i = 0; i < 2; i++) { + data->fan[i] = + sis5595_read_value(data, SIS5595_REG_FAN(i)); + data->fan_min[i] = + sis5595_read_value(data, + SIS5595_REG_FAN_MIN(i)); + } + if (data->maxins == 3) { + data->temp = + sis5595_read_value(data, SIS5595_REG_TEMP); + data->temp_over = + sis5595_read_value(data, SIS5595_REG_TEMP_OVER); + data->temp_hyst = + sis5595_read_value(data, SIS5595_REG_TEMP_HYST); + } + i = sis5595_read_value(data, SIS5595_REG_FANDIV); + data->fan_div[0] = (i >> 4) & 0x03; + data->fan_div[1] = i >> 6; + data->alarms = + sis5595_read_value(data, SIS5595_REG_ALARM1) | + (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8); + data->last_updated = jiffies; + data->valid = 1; + } + + mutex_unlock(&data->update_lock); + + return data; +} + +static const struct pci_device_id sis5595_pci_ids[] = { + { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) }, + { 0, } +}; + +MODULE_DEVICE_TABLE(pci, sis5595_pci_ids); + +static int blacklist[] = { + PCI_DEVICE_ID_SI_540, + PCI_DEVICE_ID_SI_550, + PCI_DEVICE_ID_SI_630, + PCI_DEVICE_ID_SI_645, + PCI_DEVICE_ID_SI_730, + PCI_DEVICE_ID_SI_735, + PCI_DEVICE_ID_SI_5511, /* + * 5513 chip has the 0008 device but + * that ID shows up in other chips so we + * use the 5511 ID for recognition + */ + PCI_DEVICE_ID_SI_5597, + PCI_DEVICE_ID_SI_5598, + 0 }; + +static int sis5595_device_add(unsigned short address) +{ + struct resource res = { + .start = address, + .end = address + SIS5595_EXTENT - 1, + .name = "sis5595", + .flags = IORESOURCE_IO, + }; + int err; + + err = acpi_check_resource_conflict(&res); + if (err) + goto exit; + + pdev = platform_device_alloc("sis5595", address); + if (!pdev) { + err = -ENOMEM; + pr_err("Device allocation failed\n"); + goto exit; + } + + err = platform_device_add_resources(pdev, &res, 1); + if (err) { + pr_err("Device resource addition failed (%d)\n", err); + goto exit_device_put; + } + + err = platform_device_add(pdev); + if (err) { + pr_err("Device addition failed (%d)\n", err); + goto exit_device_put; + } + + return 0; + +exit_device_put: + platform_device_put(pdev); +exit: + return err; +} + +static int sis5595_pci_probe(struct pci_dev *dev, + const struct pci_device_id *id) +{ + u16 address; + u8 enable; + int *i; + + for (i = blacklist; *i != 0; i++) { + struct pci_dev *d; + d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL); + if (d) { + dev_err(&d->dev, + "Looked for SIS5595 but found unsupported device %.4x\n", + *i); + pci_dev_put(d); + return -ENODEV; + } + } + + force_addr &= ~(SIS5595_EXTENT - 1); + if (force_addr) { + dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr); + pci_write_config_word(dev, SIS5595_BASE_REG, force_addr); + } + + if (PCIBIOS_SUCCESSFUL != + pci_read_config_word(dev, SIS5595_BASE_REG, &address)) { + dev_err(&dev->dev, "Failed to read ISA address\n"); + return -ENODEV; + } + + address &= ~(SIS5595_EXTENT - 1); + if (!address) { + dev_err(&dev->dev, + "Base address not set - upgrade BIOS or use force_addr=0xaddr\n"); + return -ENODEV; + } + if (force_addr && address != force_addr) { + /* doesn't work for some chips? */ + dev_err(&dev->dev, "Failed to force ISA address\n"); + return -ENODEV; + } + + if (PCIBIOS_SUCCESSFUL != + pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) { + dev_err(&dev->dev, "Failed to read enable register\n"); + return -ENODEV; + } + if (!(enable & 0x80)) { + if ((PCIBIOS_SUCCESSFUL != + pci_write_config_byte(dev, SIS5595_ENABLE_REG, + enable | 0x80)) + || (PCIBIOS_SUCCESSFUL != + pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable)) + || (!(enable & 0x80))) { + /* doesn't work for some chips! */ + dev_err(&dev->dev, "Failed to enable HWM device\n"); + return -ENODEV; + } + } + + if (platform_driver_register(&sis5595_driver)) { + dev_dbg(&dev->dev, "Failed to register sis5595 driver\n"); + goto exit; + } + + s_bridge = pci_dev_get(dev); + /* Sets global pdev as a side effect */ + if (sis5595_device_add(address)) + goto exit_unregister; + + /* + * Always return failure here. This is to allow other drivers to bind + * to this pci device. We don't really want to have control over the + * pci device, we only wanted to read as few register values from it. + */ + return -ENODEV; + +exit_unregister: + pci_dev_put(dev); + platform_driver_unregister(&sis5595_driver); +exit: + return -ENODEV; +} + +static struct pci_driver sis5595_pci_driver = { + .name = "sis5595", + .id_table = sis5595_pci_ids, + .probe = sis5595_pci_probe, +}; + +static int __init sm_sis5595_init(void) +{ + return pci_register_driver(&sis5595_pci_driver); +} + +static void __exit sm_sis5595_exit(void) +{ + pci_unregister_driver(&sis5595_pci_driver); + if (s_bridge != NULL) { + platform_device_unregister(pdev); + platform_driver_unregister(&sis5595_driver); + pci_dev_put(s_bridge); + s_bridge = NULL; + } +} + +MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>"); +MODULE_DESCRIPTION("SiS 5595 Sensor device"); +MODULE_LICENSE("GPL"); + +module_init(sm_sis5595_init); +module_exit(sm_sis5595_exit); |