hwmon: New PC87427 hardware monitoring driver
This is a new hardware monitoring driver for the National Semiconductor PC87427 Super-I/O chip. It only supports fan speed monitoring for now, while the chip can do much more. Thanks to Amir Habibi at Candelis for setting up a test system, and to Michael Kress for testing several iterations of this driver. Signed-off-by: Jean Delvare <khali@linux-fr.org>hifive-unleashed-5.1
Jean Delvare
Jean Delvare
parent
8e9afcbbde
commit
ba224e2c4f
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@ -0,0 +1,38 @@
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Kernel driver pc87427
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=====================
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Supported chips:
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* National Semiconductor PC87427
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Prefix: 'pc87427'
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Addresses scanned: none, address read from Super I/O config space
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Datasheet: http://www.winbond.com.tw/E-WINBONDHTM/partner/apc_007.html
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Author: Jean Delvare <khali@linux-fr.org>
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Thanks to Amir Habibi at Candelis for setting up a test system, and to
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Michael Kress for testing several iterations of this driver.
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Description
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-----------
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The National Semiconductor Super I/O chip includes complete hardware
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monitoring capabilities. It can monitor up to 18 voltages, 8 fans and
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6 temperature sensors. Only the fans are supported at the moment.
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This chip also has fan controlling features, which are not yet supported
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by this driver either.
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The driver assumes that no more than one chip is present, which seems
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reasonable.
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Fan Monitoring
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--------------
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Fan rotation speeds are reported as 14-bit values from a gated clock
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signal. Speeds down to 83 RPM can be measured.
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An alarm is triggered if the rotation speed drops below a programmable
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limit. Another alarm is triggered if the speed is too low to to be measured
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(including stalled or missing fan).
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@ -353,6 +353,19 @@ config SENSORS_PC87360
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This driver can also be built as a module. If so, the module
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will be called pc87360.
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config SENSORS_PC87427
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tristate "National Semiconductor PC87427"
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depends on HWMON && EXPERIMENTAL
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help
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If you say yes here you get access to the hardware monitoring
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functions of the National Semiconductor PC87427 Super-I/O chip.
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The chip has two distinct logical devices, one for fan speed
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monitoring and control, and one for voltage and temperature
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monitoring. Only fan speed monitoring is supported right now.
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This driver can also be built as a module. If so, the module
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will be called pc87427.
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config SENSORS_SIS5595
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tristate "Silicon Integrated Systems Corp. SiS5595"
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depends on HWMON && I2C && PCI && EXPERIMENTAL
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@ -41,6 +41,7 @@ obj-$(CONFIG_SENSORS_LM90) += lm90.o
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obj-$(CONFIG_SENSORS_LM92) += lm92.o
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obj-$(CONFIG_SENSORS_MAX1619) += max1619.o
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obj-$(CONFIG_SENSORS_PC87360) += pc87360.o
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obj-$(CONFIG_SENSORS_PC87427) += pc87427.o
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obj-$(CONFIG_SENSORS_SIS5595) += sis5595.o
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obj-$(CONFIG_SENSORS_SMSC47B397)+= smsc47b397.o
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obj-$(CONFIG_SENSORS_SMSC47M1) += smsc47m1.o
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@ -0,0 +1,627 @@
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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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* 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 <asm/io.h>
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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 class_device *class_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,
|
||||
&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] },
|
||||
};
|
||||
|
||||
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)
|
||||
{
|
||||
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++) {
|
||||
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) {
|
||||
dev_dbg(dev, "Enabling all fan inputs\n");
|
||||
for (i = 0; i < 8; i++)
|
||||
pc87427_write8_bank(data, LD_FAN, BANK_FM(i),
|
||||
PC87427_REG_FAN_STATUS,
|
||||
FAN_STATUS_MONEN);
|
||||
data->fan_enabled = 0xff;
|
||||
}
|
||||
}
|
||||
|
||||
static int __devinit pc87427_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct pc87427_data *data;
|
||||
struct resource *res;
|
||||
int i, err;
|
||||
|
||||
if (!(data = kzalloc(sizeof(struct pc87427_data), GFP_KERNEL))) {
|
||||
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);
|
||||
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_kfree;
|
||||
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->class_dev = hwmon_device_register(&pdev->dev);
|
||||
if (IS_ERR(data->class_dev)) {
|
||||
err = PTR_ERR(data->class_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_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);
|
||||
int i;
|
||||
|
||||
platform_set_drvdata(pdev, NULL);
|
||||
hwmon_device_unregister(data->class_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]);
|
||||
}
|
||||
kfree(data);
|
||||
|
||||
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;
|
||||
|
||||
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 = 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);
|
||||
Loading…
Reference in New Issue