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![Jean Delvare](/assets/img/avatar_default.png)
Check for ACPI resource conflicts in hwmon drivers. I've included all Super-I/O and PCI drivers. I've voluntarily left out: * Vendor-specific drivers: if they conflicted on any system, this would pretty much mean that they conflict on all systems, and we would know by now. * Legacy ISA drivers (lm78 and w83781d): they only support chips found on old designs were ACPI either wasn't supported or didn't deal with thermal management. * Drivers accessing the I/O resources indirectly (e.g. through SMBus): the checks are already done where they belong, i.e. in the bus drivers. Signed-off-by: Jean Delvare <jdelvare@suse.de> Acked-by: David Hubbard <david.c.hubbard@gmail.com>
786 lines
22 KiB
C
786 lines
22 KiB
C
/*
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smsc47m1.c - Part of lm_sensors, Linux kernel modules
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for hardware monitoring
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Supports the SMSC LPC47B27x, LPC47M10x, LPC47M112, LPC47M13x,
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LPC47M14x, LPC47M15x, LPC47M192, LPC47M292 and LPC47M997
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Super-I/O chips.
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Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
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Copyright (C) 2004-2007 Jean Delvare <khali@linux-fr.org>
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Ported to Linux 2.6 by Gabriele Gorla <gorlik@yahoo.com>
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and Jean Delvare
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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 as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/ioport.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/init.h>
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#include <linux/mutex.h>
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#include <linux/sysfs.h>
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#include <linux/acpi.h>
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#include <asm/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 "smsc47m1"
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enum chips { smsc47m1, smsc47m2 };
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/* Super-I/0 registers and commands */
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#define REG 0x2e /* The register to read/write */
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#define VAL 0x2f /* The value to read/write */
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static inline void
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superio_outb(int reg, int val)
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{
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outb(reg, REG);
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outb(val, VAL);
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}
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static inline int
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superio_inb(int reg)
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{
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outb(reg, REG);
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return inb(VAL);
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}
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/* logical device for fans is 0x0A */
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#define superio_select() superio_outb(0x07, 0x0A)
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static inline void
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superio_enter(void)
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{
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outb(0x55, REG);
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}
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static inline void
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superio_exit(void)
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{
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outb(0xAA, REG);
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}
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#define SUPERIO_REG_ACT 0x30
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#define SUPERIO_REG_BASE 0x60
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#define SUPERIO_REG_DEVID 0x20
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/* Logical device registers */
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#define SMSC_EXTENT 0x80
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/* nr is 0 or 1 in the macros below */
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#define SMSC47M1_REG_ALARM 0x04
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#define SMSC47M1_REG_TPIN(nr) (0x34 - (nr))
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#define SMSC47M1_REG_PPIN(nr) (0x36 - (nr))
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#define SMSC47M1_REG_FANDIV 0x58
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static const u8 SMSC47M1_REG_FAN[3] = { 0x59, 0x5a, 0x6b };
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static const u8 SMSC47M1_REG_FAN_PRELOAD[3] = { 0x5b, 0x5c, 0x6c };
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static const u8 SMSC47M1_REG_PWM[3] = { 0x56, 0x57, 0x69 };
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#define SMSC47M2_REG_ALARM6 0x09
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#define SMSC47M2_REG_TPIN1 0x38
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#define SMSC47M2_REG_TPIN2 0x37
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#define SMSC47M2_REG_TPIN3 0x2d
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#define SMSC47M2_REG_PPIN3 0x2c
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#define SMSC47M2_REG_FANDIV3 0x6a
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#define MIN_FROM_REG(reg,div) ((reg)>=192 ? 0 : \
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983040/((192-(reg))*(div)))
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#define FAN_FROM_REG(reg,div,preload) ((reg)<=(preload) || (reg)==255 ? 0 : \
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983040/(((reg)-(preload))*(div)))
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#define DIV_FROM_REG(reg) (1 << (reg))
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#define PWM_FROM_REG(reg) (((reg) & 0x7E) << 1)
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#define PWM_EN_FROM_REG(reg) ((~(reg)) & 0x01)
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#define PWM_TO_REG(reg) (((reg) >> 1) & 0x7E)
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struct smsc47m1_data {
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unsigned short addr;
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const char *name;
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enum chips type;
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struct device *hwmon_dev;
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struct mutex update_lock;
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unsigned long last_updated; /* In jiffies */
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u8 fan[3]; /* Register value */
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u8 fan_preload[3]; /* Register value */
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u8 fan_div[3]; /* Register encoding, shifted right */
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u8 alarms; /* Register encoding */
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u8 pwm[3]; /* Register value (bit 0 is disable) */
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};
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struct smsc47m1_sio_data {
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enum chips type;
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};
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static int smsc47m1_probe(struct platform_device *pdev);
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static int __devexit smsc47m1_remove(struct platform_device *pdev);
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static struct smsc47m1_data *smsc47m1_update_device(struct device *dev,
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int init);
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static inline int smsc47m1_read_value(struct smsc47m1_data *data, u8 reg)
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{
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return inb_p(data->addr + reg);
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}
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static inline void smsc47m1_write_value(struct smsc47m1_data *data, u8 reg,
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u8 value)
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{
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outb_p(value, data->addr + reg);
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}
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static struct platform_driver smsc47m1_driver = {
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.driver = {
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.owner = THIS_MODULE,
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.name = DRVNAME,
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},
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.probe = smsc47m1_probe,
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.remove = __devexit_p(smsc47m1_remove),
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};
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static ssize_t get_fan(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 smsc47m1_data *data = smsc47m1_update_device(dev, 0);
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int nr = attr->index;
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/* This chip (stupidly) stops monitoring fan speed if PWM is
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enabled and duty cycle is 0%. This is fine if the monitoring
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and control concern the same fan, but troublesome if they are
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not (which could as well happen). */
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int rpm = (data->pwm[nr] & 0x7F) == 0x00 ? 0 :
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FAN_FROM_REG(data->fan[nr],
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DIV_FROM_REG(data->fan_div[nr]),
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data->fan_preload[nr]);
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return sprintf(buf, "%d\n", rpm);
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}
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static ssize_t get_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 smsc47m1_data *data = smsc47m1_update_device(dev, 0);
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int nr = attr->index;
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int rpm = MIN_FROM_REG(data->fan_preload[nr],
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DIV_FROM_REG(data->fan_div[nr]));
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return sprintf(buf, "%d\n", rpm);
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}
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static ssize_t get_fan_div(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 smsc47m1_data *data = smsc47m1_update_device(dev, 0);
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return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
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}
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static ssize_t get_fan_alarm(struct device *dev, struct device_attribute
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*devattr, char *buf)
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{
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int bitnr = to_sensor_dev_attr(devattr)->index;
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struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
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return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
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}
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static ssize_t get_pwm(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 smsc47m1_data *data = smsc47m1_update_device(dev, 0);
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return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[attr->index]));
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}
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static ssize_t get_pwm_en(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 smsc47m1_data *data = smsc47m1_update_device(dev, 0);
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return sprintf(buf, "%d\n", PWM_EN_FROM_REG(data->pwm[attr->index]));
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}
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static ssize_t get_alarms(struct device *dev, struct device_attribute
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*devattr, char *buf)
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{
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struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
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return sprintf(buf, "%d\n", data->alarms);
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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 sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct smsc47m1_data *data = dev_get_drvdata(dev);
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int nr = attr->index;
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long rpmdiv, val = simple_strtol(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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rpmdiv = val * DIV_FROM_REG(data->fan_div[nr]);
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if (983040 > 192 * rpmdiv || 2 * rpmdiv > 983040) {
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mutex_unlock(&data->update_lock);
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return -EINVAL;
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}
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data->fan_preload[nr] = 192 - ((983040 + rpmdiv / 2) / rpmdiv);
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smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr],
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data->fan_preload[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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/* Note: we save and restore the fan minimum here, because its value is
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determined in part by the fan clock divider. This follows the principle
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of least surprise; the user doesn't expect the fan minimum to change just
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because the divider changed. */
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static ssize_t set_fan_div(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 sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct smsc47m1_data *data = dev_get_drvdata(dev);
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int nr = attr->index;
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long new_div = simple_strtol(buf, NULL, 10), tmp;
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u8 old_div = DIV_FROM_REG(data->fan_div[nr]);
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if (new_div == old_div) /* No change */
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return count;
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mutex_lock(&data->update_lock);
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switch (new_div) {
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case 1: data->fan_div[nr] = 0; break;
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case 2: data->fan_div[nr] = 1; break;
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case 4: data->fan_div[nr] = 2; break;
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case 8: data->fan_div[nr] = 3; break;
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default:
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mutex_unlock(&data->update_lock);
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return -EINVAL;
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}
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switch (nr) {
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case 0:
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case 1:
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tmp = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV)
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& ~(0x03 << (4 + 2 * nr));
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tmp |= data->fan_div[nr] << (4 + 2 * nr);
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smsc47m1_write_value(data, SMSC47M1_REG_FANDIV, tmp);
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break;
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case 2:
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tmp = smsc47m1_read_value(data, SMSC47M2_REG_FANDIV3) & 0xCF;
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tmp |= data->fan_div[2] << 4;
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smsc47m1_write_value(data, SMSC47M2_REG_FANDIV3, tmp);
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break;
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}
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/* Preserve fan min */
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tmp = 192 - (old_div * (192 - data->fan_preload[nr])
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+ new_div / 2) / new_div;
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data->fan_preload[nr] = SENSORS_LIMIT(tmp, 0, 191);
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smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr],
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data->fan_preload[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t set_pwm(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 sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct smsc47m1_data *data = dev_get_drvdata(dev);
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int nr = attr->index;
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long val = simple_strtol(buf, NULL, 10);
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if (val < 0 || val > 255)
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return -EINVAL;
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mutex_lock(&data->update_lock);
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data->pwm[nr] &= 0x81; /* Preserve additional bits */
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data->pwm[nr] |= PWM_TO_REG(val);
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smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr],
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data->pwm[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t set_pwm_en(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 sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct smsc47m1_data *data = dev_get_drvdata(dev);
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int nr = attr->index;
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long val = simple_strtol(buf, NULL, 10);
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if (val != 0 && val != 1)
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return -EINVAL;
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mutex_lock(&data->update_lock);
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data->pwm[nr] &= 0xFE; /* preserve the other bits */
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data->pwm[nr] |= !val;
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smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr],
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data->pwm[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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#define fan_present(offset) \
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static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, get_fan, \
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NULL, offset - 1); \
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static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
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get_fan_min, set_fan_min, offset - 1); \
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static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
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get_fan_div, set_fan_div, offset - 1); \
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static SENSOR_DEVICE_ATTR(fan##offset##_alarm, S_IRUGO, get_fan_alarm, \
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NULL, offset - 1); \
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static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
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get_pwm, set_pwm, offset - 1); \
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static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
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get_pwm_en, set_pwm_en, offset - 1)
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fan_present(1);
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fan_present(2);
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fan_present(3);
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static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
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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 smsc47m1_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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/* Almost all sysfs files may or may not be created depending on the chip
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setup so we create them individually. It is still convenient to define a
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group to remove them all at once. */
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static struct attribute *smsc47m1_attributes[] = {
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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_div.dev_attr.attr,
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&sensor_dev_attr_fan1_alarm.dev_attr.attr,
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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_div.dev_attr.attr,
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&sensor_dev_attr_fan2_alarm.dev_attr.attr,
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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_div.dev_attr.attr,
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&sensor_dev_attr_fan3_alarm.dev_attr.attr,
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&sensor_dev_attr_pwm1.dev_attr.attr,
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&sensor_dev_attr_pwm1_enable.dev_attr.attr,
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&sensor_dev_attr_pwm2.dev_attr.attr,
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&sensor_dev_attr_pwm2_enable.dev_attr.attr,
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&sensor_dev_attr_pwm3.dev_attr.attr,
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&sensor_dev_attr_pwm3_enable.dev_attr.attr,
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&dev_attr_alarms.attr,
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&dev_attr_name.attr,
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NULL
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};
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static const struct attribute_group smsc47m1_group = {
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.attrs = smsc47m1_attributes,
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};
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static int __init smsc47m1_find(unsigned short *addr,
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struct smsc47m1_sio_data *sio_data)
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{
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u8 val;
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superio_enter();
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val = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);
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|
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/*
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* SMSC LPC47M10x/LPC47M112/LPC47M13x (device id 0x59), LPC47M14x
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* (device id 0x5F) and LPC47B27x (device id 0x51) have fan control.
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* The LPC47M15x and LPC47M192 chips "with hardware monitoring block"
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* can do much more besides (device id 0x60).
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* The LPC47M997 is undocumented, but seems to be compatible with
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* the LPC47M192, and has the same device id.
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* The LPC47M292 (device id 0x6B) is somewhat compatible, but it
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* supports a 3rd fan, and the pin configuration registers are
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* unfortunately different.
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|
*/
|
|
switch (val) {
|
|
case 0x51:
|
|
pr_info(DRVNAME ": Found SMSC LPC47B27x\n");
|
|
sio_data->type = smsc47m1;
|
|
break;
|
|
case 0x59:
|
|
pr_info(DRVNAME ": Found SMSC LPC47M10x/LPC47M112/LPC47M13x\n");
|
|
sio_data->type = smsc47m1;
|
|
break;
|
|
case 0x5F:
|
|
pr_info(DRVNAME ": Found SMSC LPC47M14x\n");
|
|
sio_data->type = smsc47m1;
|
|
break;
|
|
case 0x60:
|
|
pr_info(DRVNAME ": Found SMSC LPC47M15x/LPC47M192/LPC47M997\n");
|
|
sio_data->type = smsc47m1;
|
|
break;
|
|
case 0x6B:
|
|
pr_info(DRVNAME ": Found SMSC LPC47M292\n");
|
|
sio_data->type = smsc47m2;
|
|
break;
|
|
default:
|
|
superio_exit();
|
|
return -ENODEV;
|
|
}
|
|
|
|
superio_select();
|
|
*addr = (superio_inb(SUPERIO_REG_BASE) << 8)
|
|
| superio_inb(SUPERIO_REG_BASE + 1);
|
|
val = superio_inb(SUPERIO_REG_ACT);
|
|
if (*addr == 0 || (val & 0x01) == 0) {
|
|
pr_info(DRVNAME ": Device is disabled, will not use\n");
|
|
superio_exit();
|
|
return -ENODEV;
|
|
}
|
|
|
|
superio_exit();
|
|
return 0;
|
|
}
|
|
|
|
static int __devinit smsc47m1_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct smsc47m1_sio_data *sio_data = dev->platform_data;
|
|
struct smsc47m1_data *data;
|
|
struct resource *res;
|
|
int err = 0;
|
|
int fan1, fan2, fan3, pwm1, pwm2, pwm3;
|
|
|
|
static const char *names[] = {
|
|
"smsc47m1",
|
|
"smsc47m2",
|
|
};
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
|
|
if (!request_region(res->start, SMSC_EXTENT, DRVNAME)) {
|
|
dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
|
|
(unsigned long)res->start,
|
|
(unsigned long)res->end);
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (!(data = kzalloc(sizeof(struct smsc47m1_data), GFP_KERNEL))) {
|
|
err = -ENOMEM;
|
|
goto error_release;
|
|
}
|
|
|
|
data->addr = res->start;
|
|
data->type = sio_data->type;
|
|
data->name = names[sio_data->type];
|
|
mutex_init(&data->update_lock);
|
|
platform_set_drvdata(pdev, data);
|
|
|
|
/* If no function is properly configured, there's no point in
|
|
actually registering the chip. */
|
|
pwm1 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(0)) & 0x05)
|
|
== 0x04;
|
|
pwm2 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(1)) & 0x05)
|
|
== 0x04;
|
|
if (data->type == smsc47m2) {
|
|
fan1 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN1)
|
|
& 0x0d) == 0x09;
|
|
fan2 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN2)
|
|
& 0x0d) == 0x09;
|
|
fan3 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN3)
|
|
& 0x0d) == 0x0d;
|
|
pwm3 = (smsc47m1_read_value(data, SMSC47M2_REG_PPIN3)
|
|
& 0x0d) == 0x08;
|
|
} else {
|
|
fan1 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(0))
|
|
& 0x05) == 0x05;
|
|
fan2 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(1))
|
|
& 0x05) == 0x05;
|
|
fan3 = 0;
|
|
pwm3 = 0;
|
|
}
|
|
if (!(fan1 || fan2 || fan3 || pwm1 || pwm2 || pwm3)) {
|
|
dev_warn(dev, "Device not configured, will not use\n");
|
|
err = -ENODEV;
|
|
goto error_free;
|
|
}
|
|
|
|
/* Some values (fan min, clock dividers, pwm registers) may be
|
|
needed before any update is triggered, so we better read them
|
|
at least once here. We don't usually do it that way, but in
|
|
this particular case, manually reading 5 registers out of 8
|
|
doesn't make much sense and we're better using the existing
|
|
function. */
|
|
smsc47m1_update_device(dev, 1);
|
|
|
|
/* Register sysfs hooks */
|
|
if (fan1) {
|
|
if ((err = device_create_file(dev,
|
|
&sensor_dev_attr_fan1_input.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan1_min.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan1_div.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan1_alarm.dev_attr)))
|
|
goto error_remove_files;
|
|
} else
|
|
dev_dbg(dev, "Fan 1 not enabled by hardware, skipping\n");
|
|
|
|
if (fan2) {
|
|
if ((err = device_create_file(dev,
|
|
&sensor_dev_attr_fan2_input.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan2_min.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan2_div.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan2_alarm.dev_attr)))
|
|
goto error_remove_files;
|
|
} else
|
|
dev_dbg(dev, "Fan 2 not enabled by hardware, skipping\n");
|
|
|
|
if (fan3) {
|
|
if ((err = device_create_file(dev,
|
|
&sensor_dev_attr_fan3_input.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan3_min.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan3_div.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_fan3_alarm.dev_attr)))
|
|
goto error_remove_files;
|
|
} else if (data->type == smsc47m2)
|
|
dev_dbg(dev, "Fan 3 not enabled by hardware, skipping\n");
|
|
|
|
if (pwm1) {
|
|
if ((err = device_create_file(dev,
|
|
&sensor_dev_attr_pwm1.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_pwm1_enable.dev_attr)))
|
|
goto error_remove_files;
|
|
} else
|
|
dev_dbg(dev, "PWM 1 not enabled by hardware, skipping\n");
|
|
|
|
if (pwm2) {
|
|
if ((err = device_create_file(dev,
|
|
&sensor_dev_attr_pwm2.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_pwm2_enable.dev_attr)))
|
|
goto error_remove_files;
|
|
} else
|
|
dev_dbg(dev, "PWM 2 not enabled by hardware, skipping\n");
|
|
|
|
if (pwm3) {
|
|
if ((err = device_create_file(dev,
|
|
&sensor_dev_attr_pwm3.dev_attr))
|
|
|| (err = device_create_file(dev,
|
|
&sensor_dev_attr_pwm3_enable.dev_attr)))
|
|
goto error_remove_files;
|
|
} else if (data->type == smsc47m2)
|
|
dev_dbg(dev, "PWM 3 not enabled by hardware, skipping\n");
|
|
|
|
if ((err = device_create_file(dev, &dev_attr_alarms)))
|
|
goto error_remove_files;
|
|
if ((err = device_create_file(dev, &dev_attr_name)))
|
|
goto error_remove_files;
|
|
|
|
data->hwmon_dev = hwmon_device_register(dev);
|
|
if (IS_ERR(data->hwmon_dev)) {
|
|
err = PTR_ERR(data->hwmon_dev);
|
|
goto error_remove_files;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error_remove_files:
|
|
sysfs_remove_group(&dev->kobj, &smsc47m1_group);
|
|
error_free:
|
|
platform_set_drvdata(pdev, NULL);
|
|
kfree(data);
|
|
error_release:
|
|
release_region(res->start, SMSC_EXTENT);
|
|
return err;
|
|
}
|
|
|
|
static int __devexit smsc47m1_remove(struct platform_device *pdev)
|
|
{
|
|
struct smsc47m1_data *data = platform_get_drvdata(pdev);
|
|
struct resource *res;
|
|
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
sysfs_remove_group(&pdev->dev.kobj, &smsc47m1_group);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
|
|
release_region(res->start, SMSC_EXTENT);
|
|
platform_set_drvdata(pdev, NULL);
|
|
kfree(data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct smsc47m1_data *smsc47m1_update_device(struct device *dev,
|
|
int init)
|
|
{
|
|
struct smsc47m1_data *data = dev_get_drvdata(dev);
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
if (time_after(jiffies, data->last_updated + HZ + HZ / 2) || init) {
|
|
int i, fan_nr;
|
|
fan_nr = data->type == smsc47m2 ? 3 : 2;
|
|
|
|
for (i = 0; i < fan_nr; i++) {
|
|
data->fan[i] = smsc47m1_read_value(data,
|
|
SMSC47M1_REG_FAN[i]);
|
|
data->fan_preload[i] = smsc47m1_read_value(data,
|
|
SMSC47M1_REG_FAN_PRELOAD[i]);
|
|
data->pwm[i] = smsc47m1_read_value(data,
|
|
SMSC47M1_REG_PWM[i]);
|
|
}
|
|
|
|
i = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV);
|
|
data->fan_div[0] = (i >> 4) & 0x03;
|
|
data->fan_div[1] = i >> 6;
|
|
|
|
data->alarms = smsc47m1_read_value(data,
|
|
SMSC47M1_REG_ALARM) >> 6;
|
|
/* Clear alarms if needed */
|
|
if (data->alarms)
|
|
smsc47m1_write_value(data, SMSC47M1_REG_ALARM, 0xC0);
|
|
|
|
if (fan_nr >= 3) {
|
|
data->fan_div[2] = (smsc47m1_read_value(data,
|
|
SMSC47M2_REG_FANDIV3) >> 4) & 0x03;
|
|
data->alarms |= (smsc47m1_read_value(data,
|
|
SMSC47M2_REG_ALARM6) & 0x40) >> 4;
|
|
/* Clear alarm if needed */
|
|
if (data->alarms & 0x04)
|
|
smsc47m1_write_value(data,
|
|
SMSC47M2_REG_ALARM6,
|
|
0x40);
|
|
}
|
|
|
|
data->last_updated = jiffies;
|
|
}
|
|
|
|
mutex_unlock(&data->update_lock);
|
|
return data;
|
|
}
|
|
|
|
static int __init smsc47m1_device_add(unsigned short address,
|
|
const struct smsc47m1_sio_data *sio_data)
|
|
{
|
|
struct resource res = {
|
|
.start = address,
|
|
.end = address + SMSC_EXTENT - 1,
|
|
.name = DRVNAME,
|
|
.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_data(pdev, sio_data,
|
|
sizeof(struct smsc47m1_sio_data));
|
|
if (err) {
|
|
printk(KERN_ERR DRVNAME ": Platform data allocation failed\n");
|
|
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 sm_smsc47m1_init(void)
|
|
{
|
|
int err;
|
|
unsigned short address;
|
|
struct smsc47m1_sio_data sio_data;
|
|
|
|
if (smsc47m1_find(&address, &sio_data))
|
|
return -ENODEV;
|
|
|
|
err = platform_driver_register(&smsc47m1_driver);
|
|
if (err)
|
|
goto exit;
|
|
|
|
/* Sets global pdev as a side effect */
|
|
err = smsc47m1_device_add(address, &sio_data);
|
|
if (err)
|
|
goto exit_driver;
|
|
|
|
return 0;
|
|
|
|
exit_driver:
|
|
platform_driver_unregister(&smsc47m1_driver);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static void __exit sm_smsc47m1_exit(void)
|
|
{
|
|
platform_device_unregister(pdev);
|
|
platform_driver_unregister(&smsc47m1_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>");
|
|
MODULE_DESCRIPTION("SMSC LPC47M1xx fan sensors driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(sm_smsc47m1_init);
|
|
module_exit(sm_smsc47m1_exit);
|