2006-12-12 17:18:29 +00:00
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/*
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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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2010-08-14 19:08:56 +00:00
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* Copyright (C) 2006, 2008 Jean Delvare <khali@linux-fr.org>
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2006-12-12 17:18:29 +00:00
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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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2010-08-14 19:08:58 +00:00
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* PC87427 - 8 4 - 0xF2
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2006-12-12 17:18:29 +00:00
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*
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* This driver assumes that no more than one chip is present.
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2010-08-14 19:08:58 +00:00
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* Only fans are supported so far, although the chip can do much more.
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2006-12-12 17:18:29 +00:00
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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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2007-05-08 15:21:59 +00:00
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#include <linux/ioport.h>
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2009-01-07 15:37:35 +00:00
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#include <linux/acpi.h>
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2009-09-15 15:18:13 +00:00
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#include <linux/io.h>
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2006-12-12 17:18:29 +00:00
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2007-12-06 22:13:42 +00:00
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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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2006-12-12 17:18:29 +00:00
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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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2007-08-20 20:46:20 +00:00
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struct device *hwmon_dev;
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2006-12-12 17:18:29 +00:00
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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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2010-08-14 19:08:58 +00:00
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u8 pwm_enabled; /* bit vector */
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u8 pwm_auto_ok; /* bit vector */
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u8 pwm_enable[4]; /* register values */
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u8 pwm[4]; /* register values */
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2006-12-12 17:18:29 +00:00
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};
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2010-08-14 19:08:56 +00:00
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struct pc87427_sio_data {
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u8 has_fanin;
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2010-08-14 19:08:58 +00:00
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u8 has_fanout;
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2010-08-14 19:08:56 +00:00
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};
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2006-12-12 17:18:29 +00:00
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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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2010-08-14 19:08:56 +00:00
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#define SIOREG_CF2 0x22 /* Configuration 2 */
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#define SIOREG_CF3 0x23 /* Configuration 3 */
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#define SIOREG_CF4 0x24 /* Configuration 4 */
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2010-08-14 19:08:58 +00:00
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#define SIOREG_CF5 0x25 /* Configuration 5 */
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2010-08-14 19:08:56 +00:00
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#define SIOREG_CFB 0x2B /* Configuration B */
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2010-08-14 19:08:58 +00:00
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#define SIOREG_CFC 0x2C /* Configuration C */
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2010-08-14 19:08:56 +00:00
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#define SIOREG_CFD 0x2D /* Configuration D */
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2006-12-12 17:18:29 +00:00
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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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2010-08-14 19:08:58 +00:00
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/*
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* PWM registers and conversions
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*/
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#define PC87427_REG_PWM_ENABLE 0x10
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#define PC87427_REG_PWM_DUTY 0x12
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#define PWM_ENABLE_MODE_MASK (7 << 4)
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#define PWM_ENABLE_CTLEN (1 << 0)
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#define PWM_MODE_MANUAL (0 << 4)
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#define PWM_MODE_AUTO (1 << 4)
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#define PWM_MODE_OFF (2 << 4)
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#define PWM_MODE_ON (7 << 4)
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/* Dedicated function to read all registers related to a given PWM output.
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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 3 */
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static void pc87427_readall_pwm(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_FC(nr), iobase + PC87427_REG_BANK);
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data->pwm_enable[nr] = inb(iobase + PC87427_REG_PWM_ENABLE);
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data->pwm[nr] = inb(iobase + PC87427_REG_PWM_DUTY);
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}
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static inline int pwm_enable_from_reg(u8 reg)
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{
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switch (reg & PWM_ENABLE_MODE_MASK) {
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case PWM_MODE_ON:
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return 0;
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case PWM_MODE_MANUAL:
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case PWM_MODE_OFF:
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return 1;
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case PWM_MODE_AUTO:
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return 2;
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default:
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return -EPROTO;
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}
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}
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static inline u8 pwm_enable_to_reg(unsigned long val, u8 pwmval)
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{
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switch (val) {
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default:
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return PWM_MODE_ON;
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case 1:
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return pwmval ? PWM_MODE_MANUAL : PWM_MODE_OFF;
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case 2:
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return PWM_MODE_AUTO;
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}
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}
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2006-12-12 17:18:29 +00:00
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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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2010-08-14 19:08:58 +00:00
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/* PWM outputs */
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for (i = 0; i < 4; i++) {
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if (!(data->pwm_enabled & (1 << i)))
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continue;
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pc87427_readall_pwm(data, i);
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}
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2006-12-12 17:18:29 +00:00
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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 pc87427_data *data = pc87427_update_device(dev);
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2010-08-14 19:08:57 +00:00
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int nr = to_sensor_dev_attr(devattr)->index;
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2006-12-12 17:18:29 +00:00
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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 pc87427_data *data = pc87427_update_device(dev);
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2010-08-14 19:08:57 +00:00
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int nr = to_sensor_dev_attr(devattr)->index;
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2006-12-12 17:18:29 +00:00
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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 pc87427_data *data = pc87427_update_device(dev);
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2010-08-14 19:08:57 +00:00
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int nr = to_sensor_dev_attr(devattr)->index;
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2006-12-12 17:18:29 +00:00
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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 pc87427_data *data = pc87427_update_device(dev);
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2010-08-14 19:08:57 +00:00
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int nr = to_sensor_dev_attr(devattr)->index;
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2006-12-12 17:18:29 +00:00
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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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2010-08-14 19:08:57 +00:00
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int nr = to_sensor_dev_attr(devattr)->index;
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unsigned long val;
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2006-12-12 17:18:29 +00:00
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int iobase = data->address[LD_FAN];
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2010-08-14 19:08:57 +00:00
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if (strict_strtoul(buf, 10, &val) < 0)
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return -EINVAL;
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2006-12-12 17:18:29 +00:00
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|
mutex_lock(&data->lock);
|
|
|
|
outb(BANK_FM(nr), iobase + PC87427_REG_BANK);
|
|
|
|
/* The low speed limit registers are read-only while monitoring
|
|
|
|
is enabled, so we have to disable monitoring, then change the
|
|
|
|
limit, and finally enable monitoring again. */
|
|
|
|
outb(0, iobase + PC87427_REG_FAN_STATUS);
|
|
|
|
data->fan_min[nr] = fan_to_reg(val);
|
|
|
|
outw(data->fan_min[nr], iobase + PC87427_REG_FAN_MIN);
|
|
|
|
outb(FAN_STATUS_MONEN, iobase + PC87427_REG_FAN_STATUS);
|
|
|
|
mutex_unlock(&data->lock);
|
|
|
|
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan_input, NULL, 2);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan_input, NULL, 3);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, show_fan_input, NULL, 4);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, show_fan_input, NULL, 5);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, show_fan_input, NULL, 6);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO, show_fan_input, NULL, 7);
|
|
|
|
|
|
|
|
static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
|
|
|
|
show_fan_min, set_fan_min, 0);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
|
|
|
|
show_fan_min, set_fan_min, 1);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO,
|
|
|
|
show_fan_min, set_fan_min, 2);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO,
|
|
|
|
show_fan_min, set_fan_min, 3);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan5_min, S_IWUSR | S_IRUGO,
|
|
|
|
show_fan_min, set_fan_min, 4);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan6_min, S_IWUSR | S_IRUGO,
|
|
|
|
show_fan_min, set_fan_min, 5);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan7_min, S_IWUSR | S_IRUGO,
|
|
|
|
show_fan_min, set_fan_min, 6);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan8_min, S_IWUSR | S_IRUGO,
|
|
|
|
show_fan_min, set_fan_min, 7);
|
|
|
|
|
|
|
|
static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_fan_alarm, NULL, 0);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_fan_alarm, NULL, 1);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_fan_alarm, NULL, 2);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_fan_alarm, NULL, 3);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_fan_alarm, NULL, 4);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO, show_fan_alarm, NULL, 5);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan7_alarm, S_IRUGO, show_fan_alarm, NULL, 6);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan8_alarm, S_IRUGO, show_fan_alarm, NULL, 7);
|
|
|
|
|
|
|
|
static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan5_fault, S_IRUGO, show_fan_fault, NULL, 4);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan6_fault, S_IRUGO, show_fan_fault, NULL, 5);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan7_fault, S_IRUGO, show_fan_fault, NULL, 6);
|
|
|
|
static SENSOR_DEVICE_ATTR(fan8_fault, S_IRUGO, show_fan_fault, NULL, 7);
|
|
|
|
|
|
|
|
static struct attribute *pc87427_attributes_fan[8][5] = {
|
|
|
|
{
|
|
|
|
&sensor_dev_attr_fan1_input.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan1_min.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan1_alarm.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan1_fault.dev_attr.attr,
|
|
|
|
NULL
|
|
|
|
}, {
|
|
|
|
&sensor_dev_attr_fan2_input.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan2_min.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan2_fault.dev_attr.attr,
|
|
|
|
NULL
|
|
|
|
}, {
|
|
|
|
&sensor_dev_attr_fan3_input.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan3_min.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan3_alarm.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan3_fault.dev_attr.attr,
|
|
|
|
NULL
|
|
|
|
}, {
|
|
|
|
&sensor_dev_attr_fan4_input.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan4_min.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan4_alarm.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan4_fault.dev_attr.attr,
|
|
|
|
NULL
|
|
|
|
}, {
|
|
|
|
&sensor_dev_attr_fan5_input.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan5_min.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan5_alarm.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan5_fault.dev_attr.attr,
|
|
|
|
NULL
|
|
|
|
}, {
|
|
|
|
&sensor_dev_attr_fan6_input.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan6_min.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan6_alarm.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan6_fault.dev_attr.attr,
|
|
|
|
NULL
|
|
|
|
}, {
|
|
|
|
&sensor_dev_attr_fan7_input.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan7_min.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan7_alarm.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan7_fault.dev_attr.attr,
|
|
|
|
NULL
|
|
|
|
}, {
|
|
|
|
&sensor_dev_attr_fan8_input.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan8_min.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan8_alarm.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_fan8_fault.dev_attr.attr,
|
|
|
|
NULL
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct attribute_group pc87427_group_fan[8] = {
|
|
|
|
{ .attrs = pc87427_attributes_fan[0] },
|
|
|
|
{ .attrs = pc87427_attributes_fan[1] },
|
|
|
|
{ .attrs = pc87427_attributes_fan[2] },
|
|
|
|
{ .attrs = pc87427_attributes_fan[3] },
|
|
|
|
{ .attrs = pc87427_attributes_fan[4] },
|
|
|
|
{ .attrs = pc87427_attributes_fan[5] },
|
|
|
|
{ .attrs = pc87427_attributes_fan[6] },
|
|
|
|
{ .attrs = pc87427_attributes_fan[7] },
|
|
|
|
};
|
|
|
|
|
2010-08-14 19:08:58 +00:00
|
|
|
/* Must be called with data->lock held and pc87427_readall_pwm() freshly
|
|
|
|
called */
|
|
|
|
static void update_pwm_enable(struct pc87427_data *data, int nr, u8 mode)
|
|
|
|
{
|
|
|
|
int iobase = data->address[LD_FAN];
|
|
|
|
data->pwm_enable[nr] &= ~PWM_ENABLE_MODE_MASK;
|
|
|
|
data->pwm_enable[nr] |= mode;
|
|
|
|
outb(data->pwm_enable[nr], iobase + PC87427_REG_PWM_ENABLE);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t show_pwm_enable(struct device *dev, struct device_attribute
|
|
|
|
*devattr, char *buf)
|
|
|
|
{
|
|
|
|
struct pc87427_data *data = pc87427_update_device(dev);
|
|
|
|
int nr = to_sensor_dev_attr(devattr)->index;
|
|
|
|
int pwm_enable;
|
|
|
|
|
|
|
|
pwm_enable = pwm_enable_from_reg(data->pwm_enable[nr]);
|
|
|
|
if (pwm_enable < 0)
|
|
|
|
return pwm_enable;
|
|
|
|
return sprintf(buf, "%d\n", pwm_enable);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t set_pwm_enable(struct device *dev, struct device_attribute
|
|
|
|
*devattr, const char *buf, size_t count)
|
|
|
|
{
|
|
|
|
struct pc87427_data *data = dev_get_drvdata(dev);
|
|
|
|
int nr = to_sensor_dev_attr(devattr)->index;
|
|
|
|
unsigned long val;
|
|
|
|
|
|
|
|
if (strict_strtoul(buf, 10, &val) < 0 || val > 2)
|
|
|
|
return -EINVAL;
|
|
|
|
/* Can't go to automatic mode if it isn't configured */
|
|
|
|
if (val == 2 && !(data->pwm_auto_ok & (1 << nr)))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
mutex_lock(&data->lock);
|
|
|
|
pc87427_readall_pwm(data, nr);
|
|
|
|
update_pwm_enable(data, nr, pwm_enable_to_reg(val, data->pwm[nr]));
|
|
|
|
mutex_unlock(&data->lock);
|
|
|
|
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t show_pwm(struct device *dev, struct device_attribute
|
|
|
|
*devattr, char *buf)
|
|
|
|
{
|
|
|
|
struct pc87427_data *data = pc87427_update_device(dev);
|
|
|
|
int nr = to_sensor_dev_attr(devattr)->index;
|
|
|
|
|
|
|
|
return sprintf(buf, "%d\n", (int)data->pwm[nr]);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t set_pwm(struct device *dev, struct device_attribute
|
|
|
|
*devattr, const char *buf, size_t count)
|
|
|
|
{
|
|
|
|
struct pc87427_data *data = dev_get_drvdata(dev);
|
|
|
|
int nr = to_sensor_dev_attr(devattr)->index;
|
|
|
|
unsigned long val;
|
|
|
|
int iobase = data->address[LD_FAN];
|
|
|
|
u8 mode;
|
|
|
|
|
|
|
|
if (strict_strtoul(buf, 10, &val) < 0 || val > 0xff)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
mutex_lock(&data->lock);
|
|
|
|
pc87427_readall_pwm(data, nr);
|
|
|
|
mode = data->pwm_enable[nr] & PWM_ENABLE_MODE_MASK;
|
|
|
|
if (mode != PWM_MODE_MANUAL && mode != PWM_MODE_OFF) {
|
|
|
|
dev_notice(dev, "Can't set PWM%d duty cycle while not in "
|
|
|
|
"manual mode\n", nr + 1);
|
|
|
|
mutex_unlock(&data->lock);
|
|
|
|
return -EPERM;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* We may have to change the mode */
|
|
|
|
if (mode == PWM_MODE_MANUAL && val == 0) {
|
|
|
|
/* Transition from Manual to Off */
|
|
|
|
update_pwm_enable(data, nr, PWM_MODE_OFF);
|
|
|
|
mode = PWM_MODE_OFF;
|
|
|
|
dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,
|
|
|
|
"manual", "off");
|
|
|
|
} else if (mode == PWM_MODE_OFF && val != 0) {
|
|
|
|
/* Transition from Off to Manual */
|
|
|
|
update_pwm_enable(data, nr, PWM_MODE_MANUAL);
|
|
|
|
mode = PWM_MODE_MANUAL;
|
|
|
|
dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,
|
|
|
|
"off", "manual");
|
|
|
|
}
|
|
|
|
|
|
|
|
data->pwm[nr] = val;
|
|
|
|
if (mode == PWM_MODE_MANUAL)
|
|
|
|
outb(val, iobase + PC87427_REG_PWM_DUTY);
|
|
|
|
mutex_unlock(&data->lock);
|
|
|
|
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
|
|
|
|
show_pwm_enable, set_pwm_enable, 0);
|
|
|
|
static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO,
|
|
|
|
show_pwm_enable, set_pwm_enable, 1);
|
|
|
|
static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO,
|
|
|
|
show_pwm_enable, set_pwm_enable, 2);
|
|
|
|
static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO,
|
|
|
|
show_pwm_enable, set_pwm_enable, 3);
|
|
|
|
|
|
|
|
static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
|
|
|
|
static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
|
|
|
|
static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
|
|
|
|
static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3);
|
|
|
|
|
|
|
|
static struct attribute *pc87427_attributes_pwm[4][3] = {
|
|
|
|
{
|
|
|
|
&sensor_dev_attr_pwm1_enable.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_pwm1.dev_attr.attr,
|
|
|
|
NULL
|
|
|
|
}, {
|
|
|
|
&sensor_dev_attr_pwm2_enable.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_pwm2.dev_attr.attr,
|
|
|
|
NULL
|
|
|
|
}, {
|
|
|
|
&sensor_dev_attr_pwm3_enable.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_pwm3.dev_attr.attr,
|
|
|
|
NULL
|
|
|
|
}, {
|
|
|
|
&sensor_dev_attr_pwm4_enable.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_pwm4.dev_attr.attr,
|
|
|
|
NULL
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct attribute_group pc87427_group_pwm[4] = {
|
|
|
|
{ .attrs = pc87427_attributes_pwm[0] },
|
|
|
|
{ .attrs = pc87427_attributes_pwm[1] },
|
|
|
|
{ .attrs = pc87427_attributes_pwm[2] },
|
|
|
|
{ .attrs = pc87427_attributes_pwm[3] },
|
|
|
|
};
|
|
|
|
|
2006-12-12 17:18:29 +00:00
|
|
|
static ssize_t show_name(struct device *dev, struct device_attribute
|
|
|
|
*devattr, char *buf)
|
|
|
|
{
|
|
|
|
struct pc87427_data *data = dev_get_drvdata(dev);
|
|
|
|
|
|
|
|
return sprintf(buf, "%s\n", data->name);
|
|
|
|
}
|
|
|
|
static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Device detection, attach and detach
|
|
|
|
*/
|
|
|
|
|
|
|
|
static void __devinit pc87427_init_device(struct device *dev)
|
|
|
|
{
|
2010-08-14 19:08:56 +00:00
|
|
|
struct pc87427_sio_data *sio_data = dev->platform_data;
|
2006-12-12 17:18:29 +00:00
|
|
|
struct pc87427_data *data = dev_get_drvdata(dev);
|
|
|
|
int i;
|
|
|
|
u8 reg;
|
|
|
|
|
|
|
|
/* The FMC module should be ready */
|
|
|
|
reg = pc87427_read8(data, LD_FAN, PC87427_REG_BANK);
|
|
|
|
if (!(reg & 0x80))
|
|
|
|
dev_warn(dev, "FMC module not ready!\n");
|
|
|
|
|
|
|
|
/* Check which fans are enabled */
|
|
|
|
for (i = 0; i < 8; i++) {
|
2010-08-14 19:08:56 +00:00
|
|
|
if (!(sio_data->has_fanin & (1 << i))) /* Not wired */
|
|
|
|
continue;
|
2006-12-12 17:18:29 +00:00
|
|
|
reg = pc87427_read8_bank(data, LD_FAN, BANK_FM(i),
|
|
|
|
PC87427_REG_FAN_STATUS);
|
|
|
|
if (reg & FAN_STATUS_MONEN)
|
|
|
|
data->fan_enabled |= (1 << i);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!data->fan_enabled) {
|
2010-08-14 19:08:56 +00:00
|
|
|
dev_dbg(dev, "Enabling monitoring of all fans\n");
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
|
|
if (!(sio_data->has_fanin & (1 << i))) /* Not wired */
|
|
|
|
continue;
|
2006-12-12 17:18:29 +00:00
|
|
|
pc87427_write8_bank(data, LD_FAN, BANK_FM(i),
|
|
|
|
PC87427_REG_FAN_STATUS,
|
|
|
|
FAN_STATUS_MONEN);
|
2010-08-14 19:08:56 +00:00
|
|
|
}
|
|
|
|
data->fan_enabled = sio_data->has_fanin;
|
2006-12-12 17:18:29 +00:00
|
|
|
}
|
2010-08-14 19:08:58 +00:00
|
|
|
|
|
|
|
/* Check which PWM outputs are enabled */
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
|
|
if (!(sio_data->has_fanout & (1 << i))) /* Not wired */
|
|
|
|
continue;
|
|
|
|
reg = pc87427_read8_bank(data, LD_FAN, BANK_FC(i),
|
|
|
|
PC87427_REG_PWM_ENABLE);
|
|
|
|
if (reg & PWM_ENABLE_CTLEN)
|
|
|
|
data->pwm_enabled |= (1 << i);
|
|
|
|
|
|
|
|
/* We don't expose an interface to reconfigure the automatic
|
|
|
|
fan control mode, so only allow to return to this mode if
|
|
|
|
it was originally set. */
|
|
|
|
if ((reg & PWM_ENABLE_MODE_MASK) == PWM_MODE_AUTO) {
|
|
|
|
dev_dbg(dev, "PWM%d is in automatic control mode\n",
|
|
|
|
i + 1);
|
|
|
|
data->pwm_auto_ok |= (1 << i);
|
|
|
|
}
|
|
|
|
}
|
2006-12-12 17:18:29 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int __devinit pc87427_probe(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct pc87427_data *data;
|
|
|
|
struct resource *res;
|
|
|
|
int i, err;
|
|
|
|
|
2010-08-14 19:08:57 +00:00
|
|
|
data = kzalloc(sizeof(struct pc87427_data), GFP_KERNEL);
|
|
|
|
if (!data) {
|
2006-12-12 17:18:29 +00:00
|
|
|
err = -ENOMEM;
|
|
|
|
printk(KERN_ERR DRVNAME ": Out of memory\n");
|
|
|
|
goto exit;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* This will need to be revisited when we add support for
|
|
|
|
temperature and voltage monitoring. */
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
|
2009-09-15 15:18:13 +00:00
|
|
|
if (!request_region(res->start, resource_size(res), DRVNAME)) {
|
2007-05-08 15:21:59 +00:00
|
|
|
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;
|
|
|
|
}
|
2006-12-12 17:18:29 +00:00
|
|
|
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 */
|
2010-08-14 19:08:57 +00:00
|
|
|
err = device_create_file(&pdev->dev, &dev_attr_name);
|
|
|
|
if (err)
|
2007-05-08 15:21:59 +00:00
|
|
|
goto exit_release_region;
|
2006-12-12 17:18:29 +00:00
|
|
|
for (i = 0; i < 8; i++) {
|
|
|
|
if (!(data->fan_enabled & (1 << i)))
|
|
|
|
continue;
|
2010-08-14 19:08:57 +00:00
|
|
|
err = sysfs_create_group(&pdev->dev.kobj,
|
|
|
|
&pc87427_group_fan[i]);
|
|
|
|
if (err)
|
2006-12-12 17:18:29 +00:00
|
|
|
goto exit_remove_files;
|
|
|
|
}
|
2010-08-14 19:08:58 +00:00
|
|
|
for (i = 0; i < 4; i++) {
|
|
|
|
if (!(data->pwm_enabled & (1 << i)))
|
|
|
|
continue;
|
|
|
|
err = sysfs_create_group(&pdev->dev.kobj,
|
|
|
|
&pc87427_group_pwm[i]);
|
|
|
|
if (err)
|
|
|
|
goto exit_remove_files;
|
|
|
|
}
|
2006-12-12 17:18:29 +00:00
|
|
|
|
2007-08-20 20:46:20 +00:00
|
|
|
data->hwmon_dev = hwmon_device_register(&pdev->dev);
|
|
|
|
if (IS_ERR(data->hwmon_dev)) {
|
|
|
|
err = PTR_ERR(data->hwmon_dev);
|
2006-12-12 17:18:29 +00:00
|
|
|
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]);
|
|
|
|
}
|
2010-08-14 19:08:58 +00:00
|
|
|
for (i = 0; i < 4; i++) {
|
|
|
|
if (!(data->pwm_enabled & (1 << i)))
|
|
|
|
continue;
|
|
|
|
sysfs_remove_group(&pdev->dev.kobj, &pc87427_group_pwm[i]);
|
|
|
|
}
|
2007-05-08 15:21:59 +00:00
|
|
|
exit_release_region:
|
2009-09-15 15:18:13 +00:00
|
|
|
release_region(res->start, resource_size(res));
|
2006-12-12 17:18:29 +00:00
|
|
|
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);
|
2007-05-08 15:21:59 +00:00
|
|
|
struct resource *res;
|
2006-12-12 17:18:29 +00:00
|
|
|
int i;
|
|
|
|
|
2007-08-20 20:46:20 +00:00
|
|
|
hwmon_device_unregister(data->hwmon_dev);
|
2006-12-12 17:18:29 +00:00
|
|
|
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]);
|
|
|
|
}
|
2010-08-14 19:08:58 +00:00
|
|
|
for (i = 0; i < 4; i++) {
|
|
|
|
if (!(data->pwm_enabled & (1 << i)))
|
|
|
|
continue;
|
|
|
|
sysfs_remove_group(&pdev->dev.kobj, &pc87427_group_pwm[i]);
|
|
|
|
}
|
2007-06-12 11:57:19 +00:00
|
|
|
platform_set_drvdata(pdev, NULL);
|
2006-12-12 17:18:29 +00:00
|
|
|
kfree(data);
|
|
|
|
|
2007-05-08 15:21:59 +00:00
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
|
2009-09-15 15:18:13 +00:00
|
|
|
release_region(res->start, resource_size(res));
|
2007-05-08 15:21:59 +00:00
|
|
|
|
2006-12-12 17:18:29 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static struct platform_driver pc87427_driver = {
|
|
|
|
.driver = {
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.name = DRVNAME,
|
|
|
|
},
|
|
|
|
.probe = pc87427_probe,
|
|
|
|
.remove = __devexit_p(pc87427_remove),
|
|
|
|
};
|
|
|
|
|
2010-08-14 19:08:56 +00:00
|
|
|
static int __init pc87427_device_add(unsigned short address,
|
|
|
|
const struct pc87427_sio_data *sio_data)
|
2006-12-12 17:18:29 +00:00
|
|
|
{
|
|
|
|
struct resource res = {
|
|
|
|
.start = address,
|
|
|
|
.end = address + REGION_LENGTH - 1,
|
|
|
|
.name = logdev_str[0],
|
|
|
|
.flags = IORESOURCE_IO,
|
|
|
|
};
|
|
|
|
int err;
|
|
|
|
|
2009-01-07 15:37:35 +00:00
|
|
|
err = acpi_check_resource_conflict(&res);
|
|
|
|
if (err)
|
|
|
|
goto exit;
|
|
|
|
|
2006-12-12 17:18:29 +00:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2010-08-14 19:08:56 +00:00
|
|
|
err = platform_device_add_data(pdev, sio_data,
|
|
|
|
sizeof(struct pc87427_sio_data));
|
|
|
|
if (err) {
|
|
|
|
printk(KERN_ERR DRVNAME ": Platform data allocation failed\n");
|
|
|
|
goto exit_device_put;
|
|
|
|
}
|
|
|
|
|
2006-12-12 17:18:29 +00:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2010-08-14 19:08:56 +00:00
|
|
|
static int __init pc87427_find(int sioaddr, unsigned short *address,
|
|
|
|
struct pc87427_sio_data *sio_data)
|
2006-12-12 17:18:29 +00:00
|
|
|
{
|
|
|
|
u16 val;
|
2010-08-14 19:08:56 +00:00
|
|
|
u8 cfg, cfg_b;
|
2006-12-12 17:18:29 +00:00
|
|
|
int i, err = 0;
|
|
|
|
|
|
|
|
/* Identify device */
|
2007-12-06 22:13:42 +00:00
|
|
|
val = force_id ? force_id : superio_inb(sioaddr, SIOREG_DEVID);
|
2006-12-12 17:18:29 +00:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2010-08-14 19:08:56 +00:00
|
|
|
/* Check which fan inputs are wired */
|
|
|
|
sio_data->has_fanin = (1 << 2) | (1 << 3); /* FANIN2, FANIN3 */
|
|
|
|
|
|
|
|
cfg = superio_inb(sioaddr, SIOREG_CF2);
|
|
|
|
if (!(cfg & (1 << 3)))
|
|
|
|
sio_data->has_fanin |= (1 << 0); /* FANIN0 */
|
|
|
|
if (!(cfg & (1 << 2)))
|
|
|
|
sio_data->has_fanin |= (1 << 4); /* FANIN4 */
|
|
|
|
|
|
|
|
cfg = superio_inb(sioaddr, SIOREG_CFD);
|
|
|
|
if (!(cfg & (1 << 0)))
|
|
|
|
sio_data->has_fanin |= (1 << 1); /* FANIN1 */
|
|
|
|
|
|
|
|
cfg = superio_inb(sioaddr, SIOREG_CF4);
|
|
|
|
if (!(cfg & (1 << 0)))
|
|
|
|
sio_data->has_fanin |= (1 << 7); /* FANIN7 */
|
|
|
|
cfg_b = superio_inb(sioaddr, SIOREG_CFB);
|
|
|
|
if (!(cfg & (1 << 1)) && (cfg_b & (1 << 3)))
|
|
|
|
sio_data->has_fanin |= (1 << 5); /* FANIN5 */
|
|
|
|
cfg = superio_inb(sioaddr, SIOREG_CF3);
|
|
|
|
if ((cfg & (1 << 3)) && !(cfg_b & (1 << 5)))
|
|
|
|
sio_data->has_fanin |= (1 << 6); /* FANIN6 */
|
|
|
|
|
2010-08-14 19:08:58 +00:00
|
|
|
/* Check which fan outputs are wired */
|
|
|
|
sio_data->has_fanout = (1 << 0); /* FANOUT0 */
|
|
|
|
if (cfg_b & (1 << 0))
|
|
|
|
sio_data->has_fanout |= (1 << 3); /* FANOUT3 */
|
|
|
|
|
|
|
|
cfg = superio_inb(sioaddr, SIOREG_CFC);
|
|
|
|
if (!(cfg & (1 << 4))) {
|
|
|
|
if (cfg_b & (1 << 1))
|
|
|
|
sio_data->has_fanout |= (1 << 1); /* FANOUT1 */
|
|
|
|
if (cfg_b & (1 << 2))
|
|
|
|
sio_data->has_fanout |= (1 << 2); /* FANOUT2 */
|
|
|
|
}
|
|
|
|
|
|
|
|
/* FANOUT1 and FANOUT2 can each be routed to 2 different pins */
|
|
|
|
cfg = superio_inb(sioaddr, SIOREG_CF5);
|
|
|
|
if (cfg & (1 << 6))
|
|
|
|
sio_data->has_fanout |= (1 << 1); /* FANOUT1 */
|
|
|
|
if (cfg & (1 << 5))
|
|
|
|
sio_data->has_fanout |= (1 << 2); /* FANOUT2 */
|
|
|
|
|
2006-12-12 17:18:29 +00:00
|
|
|
exit:
|
|
|
|
superio_exit(sioaddr);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __init pc87427_init(void)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
unsigned short address[2];
|
2010-08-14 19:08:56 +00:00
|
|
|
struct pc87427_sio_data sio_data;
|
2006-12-12 17:18:29 +00:00
|
|
|
|
2010-08-14 19:08:56 +00:00
|
|
|
if (pc87427_find(0x2e, address, &sio_data)
|
|
|
|
&& pc87427_find(0x4e, address, &sio_data))
|
2006-12-12 17:18:29 +00:00
|
|
|
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 */
|
2010-08-14 19:08:56 +00:00
|
|
|
err = pc87427_device_add(address[0], &sio_data);
|
2006-12-12 17:18:29 +00:00
|
|
|
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");
|
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module_init(pc87427_init);
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module_exit(pc87427_exit);
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