650 lines
18 KiB
C
650 lines
18 KiB
C
/*
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* pc87427.c - hardware monitoring driver for the
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* National Semiconductor PC87427 Super-I/O chip
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* Copyright (C) 2006 Jean Delvare <khali@linux-fr.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Supports the following chips:
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*
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* Chip #vin #fan #pwm #temp devid
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* PC87427 - 8 - - 0xF2
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*
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* This driver assumes that no more than one chip is present.
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* Only fan inputs are supported so far, although the chip can do much more.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/platform_device.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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#include <linux/sysfs.h>
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#include <linux/ioport.h>
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#include <linux/acpi.h>
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#include <linux/io.h>
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static unsigned short force_id;
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module_param(force_id, ushort, 0);
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MODULE_PARM_DESC(force_id, "Override the detected device ID");
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static struct platform_device *pdev;
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#define DRVNAME "pc87427"
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/* The lock mutex protects both the I/O accesses (needed because the
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device is using banked registers) and the register cache (needed to keep
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the data in the registers and the cache in sync at any time). */
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struct pc87427_data {
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struct device *hwmon_dev;
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struct mutex lock;
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int address[2];
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const char *name;
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unsigned long last_updated; /* in jiffies */
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u8 fan_enabled; /* bit vector */
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u16 fan[8]; /* register values */
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u16 fan_min[8]; /* register values */
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u8 fan_status[8]; /* register values */
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};
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/*
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* Super-I/O registers and operations
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*/
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#define SIOREG_LDSEL 0x07 /* Logical device select */
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#define SIOREG_DEVID 0x20 /* Device ID */
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#define SIOREG_ACT 0x30 /* Device activation */
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#define SIOREG_MAP 0x50 /* I/O or memory mapping */
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#define SIOREG_IOBASE 0x60 /* I/O base address */
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static const u8 logdev[2] = { 0x09, 0x14 };
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static const char *logdev_str[2] = { DRVNAME " FMC", DRVNAME " HMC" };
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#define LD_FAN 0
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#define LD_IN 1
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#define LD_TEMP 1
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static inline void superio_outb(int sioaddr, int reg, int val)
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{
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outb(reg, sioaddr);
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outb(val, sioaddr + 1);
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}
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static inline int superio_inb(int sioaddr, int reg)
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{
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outb(reg, sioaddr);
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return inb(sioaddr + 1);
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}
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static inline void superio_exit(int sioaddr)
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{
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outb(0x02, sioaddr);
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outb(0x02, sioaddr + 1);
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}
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/*
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* Logical devices
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*/
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#define REGION_LENGTH 32
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#define PC87427_REG_BANK 0x0f
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#define BANK_FM(nr) (nr)
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#define BANK_FT(nr) (0x08 + (nr))
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#define BANK_FC(nr) (0x10 + (nr) * 2)
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/*
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* I/O access functions
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*/
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/* ldi is the logical device index */
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static inline int pc87427_read8(struct pc87427_data *data, u8 ldi, u8 reg)
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{
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return inb(data->address[ldi] + reg);
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}
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/* Must be called with data->lock held, except during init */
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static inline int pc87427_read8_bank(struct pc87427_data *data, u8 ldi,
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u8 bank, u8 reg)
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{
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outb(bank, data->address[ldi] + PC87427_REG_BANK);
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return inb(data->address[ldi] + reg);
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}
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/* Must be called with data->lock held, except during init */
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static inline void pc87427_write8_bank(struct pc87427_data *data, u8 ldi,
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u8 bank, u8 reg, u8 value)
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{
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outb(bank, data->address[ldi] + PC87427_REG_BANK);
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outb(value, data->address[ldi] + reg);
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}
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/*
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* Fan registers and conversions
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*/
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/* fan data registers are 16-bit wide */
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#define PC87427_REG_FAN 0x12
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#define PC87427_REG_FAN_MIN 0x14
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#define PC87427_REG_FAN_STATUS 0x10
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#define FAN_STATUS_STALL (1 << 3)
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#define FAN_STATUS_LOSPD (1 << 1)
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#define FAN_STATUS_MONEN (1 << 0)
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/* Dedicated function to read all registers related to a given fan input.
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This saves us quite a few locks and bank selections.
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Must be called with data->lock held.
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nr is from 0 to 7 */
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static void pc87427_readall_fan(struct pc87427_data *data, u8 nr)
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{
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int iobase = data->address[LD_FAN];
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outb(BANK_FM(nr), iobase + PC87427_REG_BANK);
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data->fan[nr] = inw(iobase + PC87427_REG_FAN);
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data->fan_min[nr] = inw(iobase + PC87427_REG_FAN_MIN);
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data->fan_status[nr] = inb(iobase + PC87427_REG_FAN_STATUS);
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/* Clear fan alarm bits */
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outb(data->fan_status[nr], iobase + PC87427_REG_FAN_STATUS);
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}
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/* The 2 LSB of fan speed registers are used for something different.
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The actual 2 LSB of the measurements are not available. */
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static inline unsigned long fan_from_reg(u16 reg)
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{
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reg &= 0xfffc;
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if (reg == 0x0000 || reg == 0xfffc)
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return 0;
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return 5400000UL / reg;
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}
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/* The 2 LSB of the fan speed limit registers are not significant. */
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static inline u16 fan_to_reg(unsigned long val)
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{
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if (val < 83UL)
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return 0xffff;
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if (val >= 1350000UL)
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return 0x0004;
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return ((1350000UL + val / 2) / val) << 2;
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}
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/*
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* Data interface
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*/
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static struct pc87427_data *pc87427_update_device(struct device *dev)
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{
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struct pc87427_data *data = dev_get_drvdata(dev);
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int i;
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mutex_lock(&data->lock);
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if (!time_after(jiffies, data->last_updated + HZ)
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&& data->last_updated)
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goto done;
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/* Fans */
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for (i = 0; i < 8; i++) {
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if (!(data->fan_enabled & (1 << i)))
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continue;
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pc87427_readall_fan(data, i);
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}
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data->last_updated = jiffies;
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done:
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mutex_unlock(&data->lock);
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return data;
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}
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static ssize_t show_fan_input(struct device *dev, struct device_attribute
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*devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct pc87427_data *data = pc87427_update_device(dev);
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int nr = attr->index;
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return sprintf(buf, "%lu\n", fan_from_reg(data->fan[nr]));
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}
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static ssize_t show_fan_min(struct device *dev, struct device_attribute
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*devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct pc87427_data *data = pc87427_update_device(dev);
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int nr = attr->index;
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return sprintf(buf, "%lu\n", fan_from_reg(data->fan_min[nr]));
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}
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static ssize_t show_fan_alarm(struct device *dev, struct device_attribute
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*devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct pc87427_data *data = pc87427_update_device(dev);
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int nr = attr->index;
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return sprintf(buf, "%d\n", !!(data->fan_status[nr]
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& FAN_STATUS_LOSPD));
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}
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static ssize_t show_fan_fault(struct device *dev, struct device_attribute
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*devattr, char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct pc87427_data *data = pc87427_update_device(dev);
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int nr = attr->index;
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return sprintf(buf, "%d\n", !!(data->fan_status[nr]
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& FAN_STATUS_STALL));
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}
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static ssize_t set_fan_min(struct device *dev, struct device_attribute
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*devattr, const char *buf, size_t count)
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{
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struct pc87427_data *data = dev_get_drvdata(dev);
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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int nr = attr->index;
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unsigned long val = simple_strtoul(buf, NULL, 10);
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int iobase = data->address[LD_FAN];
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mutex_lock(&data->lock);
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outb(BANK_FM(nr), iobase + PC87427_REG_BANK);
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/* The low speed limit registers are read-only while monitoring
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is enabled, so we have to disable monitoring, then change the
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limit, and finally enable monitoring again. */
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outb(0, iobase + PC87427_REG_FAN_STATUS);
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data->fan_min[nr] = fan_to_reg(val);
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outw(data->fan_min[nr], iobase + PC87427_REG_FAN_MIN);
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outb(FAN_STATUS_MONEN, iobase + PC87427_REG_FAN_STATUS);
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mutex_unlock(&data->lock);
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return count;
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}
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static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
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static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
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static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan_input, NULL, 2);
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static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan_input, NULL, 3);
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static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, show_fan_input, NULL, 4);
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static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, show_fan_input, NULL, 5);
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static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, show_fan_input, NULL, 6);
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static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO, show_fan_input, NULL, 7);
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static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
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show_fan_min, set_fan_min, 0);
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static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
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show_fan_min, set_fan_min, 1);
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static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO,
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show_fan_min, set_fan_min, 2);
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static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO,
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show_fan_min, set_fan_min, 3);
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static SENSOR_DEVICE_ATTR(fan5_min, S_IWUSR | S_IRUGO,
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show_fan_min, set_fan_min, 4);
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static SENSOR_DEVICE_ATTR(fan6_min, S_IWUSR | S_IRUGO,
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show_fan_min, set_fan_min, 5);
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static SENSOR_DEVICE_ATTR(fan7_min, S_IWUSR | S_IRUGO,
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show_fan_min, set_fan_min, 6);
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static SENSOR_DEVICE_ATTR(fan8_min, S_IWUSR | S_IRUGO,
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show_fan_min, set_fan_min, 7);
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static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_fan_alarm, NULL, 0);
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static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_fan_alarm, NULL, 1);
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static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_fan_alarm, NULL, 2);
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static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_fan_alarm, NULL, 3);
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static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_fan_alarm, NULL, 4);
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static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO, show_fan_alarm, NULL, 5);
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static SENSOR_DEVICE_ATTR(fan7_alarm, S_IRUGO, show_fan_alarm, NULL, 6);
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static SENSOR_DEVICE_ATTR(fan8_alarm, S_IRUGO, show_fan_alarm, NULL, 7);
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static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
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static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
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static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
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static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
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static SENSOR_DEVICE_ATTR(fan5_fault, S_IRUGO, show_fan_fault, NULL, 4);
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static SENSOR_DEVICE_ATTR(fan6_fault, S_IRUGO, show_fan_fault, NULL, 5);
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static SENSOR_DEVICE_ATTR(fan7_fault, S_IRUGO, show_fan_fault, NULL, 6);
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static SENSOR_DEVICE_ATTR(fan8_fault, S_IRUGO, show_fan_fault, NULL, 7);
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static struct attribute *pc87427_attributes_fan[8][5] = {
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{
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&sensor_dev_attr_fan1_input.dev_attr.attr,
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&sensor_dev_attr_fan1_min.dev_attr.attr,
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&sensor_dev_attr_fan1_alarm.dev_attr.attr,
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&sensor_dev_attr_fan1_fault.dev_attr.attr,
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NULL
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}, {
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&sensor_dev_attr_fan2_input.dev_attr.attr,
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&sensor_dev_attr_fan2_min.dev_attr.attr,
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&sensor_dev_attr_fan2_alarm.dev_attr.attr,
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&sensor_dev_attr_fan2_fault.dev_attr.attr,
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NULL
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}, {
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&sensor_dev_attr_fan3_input.dev_attr.attr,
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&sensor_dev_attr_fan3_min.dev_attr.attr,
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&sensor_dev_attr_fan3_alarm.dev_attr.attr,
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&sensor_dev_attr_fan3_fault.dev_attr.attr,
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NULL
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}, {
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&sensor_dev_attr_fan4_input.dev_attr.attr,
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&sensor_dev_attr_fan4_min.dev_attr.attr,
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&sensor_dev_attr_fan4_alarm.dev_attr.attr,
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&sensor_dev_attr_fan4_fault.dev_attr.attr,
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NULL
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}, {
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&sensor_dev_attr_fan5_input.dev_attr.attr,
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&sensor_dev_attr_fan5_min.dev_attr.attr,
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&sensor_dev_attr_fan5_alarm.dev_attr.attr,
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&sensor_dev_attr_fan5_fault.dev_attr.attr,
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NULL
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}, {
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&sensor_dev_attr_fan6_input.dev_attr.attr,
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&sensor_dev_attr_fan6_min.dev_attr.attr,
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&sensor_dev_attr_fan6_alarm.dev_attr.attr,
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&sensor_dev_attr_fan6_fault.dev_attr.attr,
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NULL
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}, {
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&sensor_dev_attr_fan7_input.dev_attr.attr,
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&sensor_dev_attr_fan7_min.dev_attr.attr,
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&sensor_dev_attr_fan7_alarm.dev_attr.attr,
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&sensor_dev_attr_fan7_fault.dev_attr.attr,
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NULL
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}, {
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&sensor_dev_attr_fan8_input.dev_attr.attr,
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&sensor_dev_attr_fan8_min.dev_attr.attr,
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&sensor_dev_attr_fan8_alarm.dev_attr.attr,
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&sensor_dev_attr_fan8_fault.dev_attr.attr,
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NULL
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}
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};
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static const struct attribute_group pc87427_group_fan[8] = {
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{ .attrs = pc87427_attributes_fan[0] },
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{ .attrs = pc87427_attributes_fan[1] },
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{ .attrs = pc87427_attributes_fan[2] },
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{ .attrs = pc87427_attributes_fan[3] },
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{ .attrs = pc87427_attributes_fan[4] },
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{ .attrs = pc87427_attributes_fan[5] },
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{ .attrs = pc87427_attributes_fan[6] },
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{ .attrs = pc87427_attributes_fan[7] },
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};
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static ssize_t show_name(struct device *dev, struct device_attribute
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*devattr, char *buf)
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{
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struct pc87427_data *data = dev_get_drvdata(dev);
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return sprintf(buf, "%s\n", data->name);
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}
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static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
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/*
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* Device detection, attach and detach
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*/
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static void __devinit pc87427_init_device(struct device *dev)
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{
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struct pc87427_data *data = dev_get_drvdata(dev);
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int i;
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u8 reg;
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/* The FMC module should be ready */
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reg = pc87427_read8(data, LD_FAN, PC87427_REG_BANK);
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if (!(reg & 0x80))
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dev_warn(dev, "FMC module not ready!\n");
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/* Check which fans are enabled */
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for (i = 0; i < 8; i++) {
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reg = pc87427_read8_bank(data, LD_FAN, BANK_FM(i),
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PC87427_REG_FAN_STATUS);
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if (reg & FAN_STATUS_MONEN)
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data->fan_enabled |= (1 << i);
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}
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if (!data->fan_enabled) {
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dev_dbg(dev, "Enabling all fan inputs\n");
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for (i = 0; i < 8; i++)
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pc87427_write8_bank(data, LD_FAN, BANK_FM(i),
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PC87427_REG_FAN_STATUS,
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FAN_STATUS_MONEN);
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data->fan_enabled = 0xff;
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}
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}
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static int __devinit pc87427_probe(struct platform_device *pdev)
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{
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struct pc87427_data *data;
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struct resource *res;
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int i, err;
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if (!(data = kzalloc(sizeof(struct pc87427_data), GFP_KERNEL))) {
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err = -ENOMEM;
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printk(KERN_ERR DRVNAME ": Out of memory\n");
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goto exit;
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}
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/* This will need to be revisited when we add support for
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temperature and voltage monitoring. */
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res = platform_get_resource(pdev, IORESOURCE_IO, 0);
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if (!request_region(res->start, resource_size(res), DRVNAME)) {
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err = -EBUSY;
|
|
dev_err(&pdev->dev, "Failed to request region 0x%lx-0x%lx\n",
|
|
(unsigned long)res->start, (unsigned long)res->end);
|
|
goto exit_kfree;
|
|
}
|
|
data->address[0] = res->start;
|
|
|
|
mutex_init(&data->lock);
|
|
data->name = "pc87427";
|
|
platform_set_drvdata(pdev, data);
|
|
pc87427_init_device(&pdev->dev);
|
|
|
|
/* Register sysfs hooks */
|
|
if ((err = device_create_file(&pdev->dev, &dev_attr_name)))
|
|
goto exit_release_region;
|
|
for (i = 0; i < 8; i++) {
|
|
if (!(data->fan_enabled & (1 << i)))
|
|
continue;
|
|
if ((err = sysfs_create_group(&pdev->dev.kobj,
|
|
&pc87427_group_fan[i])))
|
|
goto exit_remove_files;
|
|
}
|
|
|
|
data->hwmon_dev = hwmon_device_register(&pdev->dev);
|
|
if (IS_ERR(data->hwmon_dev)) {
|
|
err = PTR_ERR(data->hwmon_dev);
|
|
dev_err(&pdev->dev, "Class registration failed (%d)\n", err);
|
|
goto exit_remove_files;
|
|
}
|
|
|
|
return 0;
|
|
|
|
exit_remove_files:
|
|
for (i = 0; i < 8; i++) {
|
|
if (!(data->fan_enabled & (1 << i)))
|
|
continue;
|
|
sysfs_remove_group(&pdev->dev.kobj, &pc87427_group_fan[i]);
|
|
}
|
|
exit_release_region:
|
|
release_region(res->start, resource_size(res));
|
|
exit_kfree:
|
|
platform_set_drvdata(pdev, NULL);
|
|
kfree(data);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static int __devexit pc87427_remove(struct platform_device *pdev)
|
|
{
|
|
struct pc87427_data *data = platform_get_drvdata(pdev);
|
|
struct resource *res;
|
|
int i;
|
|
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
device_remove_file(&pdev->dev, &dev_attr_name);
|
|
for (i = 0; i < 8; i++) {
|
|
if (!(data->fan_enabled & (1 << i)))
|
|
continue;
|
|
sysfs_remove_group(&pdev->dev.kobj, &pc87427_group_fan[i]);
|
|
}
|
|
platform_set_drvdata(pdev, NULL);
|
|
kfree(data);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
|
|
release_region(res->start, resource_size(res));
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct platform_driver pc87427_driver = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = DRVNAME,
|
|
},
|
|
.probe = pc87427_probe,
|
|
.remove = __devexit_p(pc87427_remove),
|
|
};
|
|
|
|
static int __init pc87427_device_add(unsigned short address)
|
|
{
|
|
struct resource res = {
|
|
.start = address,
|
|
.end = address + REGION_LENGTH - 1,
|
|
.name = logdev_str[0],
|
|
.flags = IORESOURCE_IO,
|
|
};
|
|
int err;
|
|
|
|
err = acpi_check_resource_conflict(&res);
|
|
if (err)
|
|
goto exit;
|
|
|
|
pdev = platform_device_alloc(DRVNAME, address);
|
|
if (!pdev) {
|
|
err = -ENOMEM;
|
|
printk(KERN_ERR DRVNAME ": Device allocation failed\n");
|
|
goto exit;
|
|
}
|
|
|
|
err = platform_device_add_resources(pdev, &res, 1);
|
|
if (err) {
|
|
printk(KERN_ERR DRVNAME ": Device resource addition failed "
|
|
"(%d)\n", err);
|
|
goto exit_device_put;
|
|
}
|
|
|
|
err = platform_device_add(pdev);
|
|
if (err) {
|
|
printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
|
|
err);
|
|
goto exit_device_put;
|
|
}
|
|
|
|
return 0;
|
|
|
|
exit_device_put:
|
|
platform_device_put(pdev);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static int __init pc87427_find(int sioaddr, unsigned short *address)
|
|
{
|
|
u16 val;
|
|
int i, err = 0;
|
|
|
|
/* Identify device */
|
|
val = force_id ? force_id : superio_inb(sioaddr, SIOREG_DEVID);
|
|
if (val != 0xf2) { /* PC87427 */
|
|
err = -ENODEV;
|
|
goto exit;
|
|
}
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
address[i] = 0;
|
|
/* Select logical device */
|
|
superio_outb(sioaddr, SIOREG_LDSEL, logdev[i]);
|
|
|
|
val = superio_inb(sioaddr, SIOREG_ACT);
|
|
if (!(val & 0x01)) {
|
|
printk(KERN_INFO DRVNAME ": Logical device 0x%02x "
|
|
"not activated\n", logdev[i]);
|
|
continue;
|
|
}
|
|
|
|
val = superio_inb(sioaddr, SIOREG_MAP);
|
|
if (val & 0x01) {
|
|
printk(KERN_WARNING DRVNAME ": Logical device 0x%02x "
|
|
"is memory-mapped, can't use\n", logdev[i]);
|
|
continue;
|
|
}
|
|
|
|
val = (superio_inb(sioaddr, SIOREG_IOBASE) << 8)
|
|
| superio_inb(sioaddr, SIOREG_IOBASE + 1);
|
|
if (!val) {
|
|
printk(KERN_INFO DRVNAME ": I/O base address not set "
|
|
"for logical device 0x%02x\n", logdev[i]);
|
|
continue;
|
|
}
|
|
address[i] = val;
|
|
}
|
|
|
|
exit:
|
|
superio_exit(sioaddr);
|
|
return err;
|
|
}
|
|
|
|
static int __init pc87427_init(void)
|
|
{
|
|
int err;
|
|
unsigned short address[2];
|
|
|
|
if (pc87427_find(0x2e, address)
|
|
&& pc87427_find(0x4e, address))
|
|
return -ENODEV;
|
|
|
|
/* For now the driver only handles fans so we only care about the
|
|
first address. */
|
|
if (!address[0])
|
|
return -ENODEV;
|
|
|
|
err = platform_driver_register(&pc87427_driver);
|
|
if (err)
|
|
goto exit;
|
|
|
|
/* Sets global pdev as a side effect */
|
|
err = pc87427_device_add(address[0]);
|
|
if (err)
|
|
goto exit_driver;
|
|
|
|
return 0;
|
|
|
|
exit_driver:
|
|
platform_driver_unregister(&pc87427_driver);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static void __exit pc87427_exit(void)
|
|
{
|
|
platform_device_unregister(pdev);
|
|
platform_driver_unregister(&pc87427_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
|
|
MODULE_DESCRIPTION("PC87427 hardware monitoring driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(pc87427_init);
|
|
module_exit(pc87427_exit);
|