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linux-next/drivers/hwmon/vt1211.c
Jean Delvare 67b671bceb hwmon: Let the user override the detected Super-I/O device ID 
While it is possible to force SMBus-based hardware monitoring chip
drivers to drive a not officially supported device, we do not have this
possibility for Super-I/O-based drivers. That's unfortunate because
sometimes newer chips are fully compatible and just forcing the driver
to load would work. Instead of that we have to tell the users to
recompile the kernel driver, which isn't an easy task for everyone.

So, I propose that we add a module parameter to all Super-I/O based
hardware monitoring drivers, letting advanced users force the driver
to load on their machine. The user has to provide the device ID of a
supposedly compatible device. This requires looking at the source code or
a datasheet, so I am confident that users can't randomly force a driver
without knowing what they are doing. Thus this should be relatively safe.

As you can see from the code, the implementation is pretty simple and
unintrusive.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
2008-02-07 20:39:42 -05:00

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/*
* vt1211.c - driver for the VIA VT1211 Super-I/O chip integrated hardware
* monitoring features
* Copyright (C) 2006 Juerg Haefliger <juergh@gmail.com>
*
* This driver is based on the driver for kernel 2.4 by Mark D. Studebaker
* and its port to kernel 2.6 by Lars Ekman.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/ioport.h>
#include <asm/io.h>
static int uch_config = -1;
module_param(uch_config, int, 0);
MODULE_PARM_DESC(uch_config, "Initialize the universal channel configuration");
static int int_mode = -1;
module_param(int_mode, int, 0);
MODULE_PARM_DESC(int_mode, "Force the temperature interrupt mode");
static unsigned short force_id;
module_param(force_id, ushort, 0);
MODULE_PARM_DESC(force_id, "Override the detected device ID");
static struct platform_device *pdev;
#define DRVNAME "vt1211"
/* ---------------------------------------------------------------------
* Registers
*
* The sensors are defined as follows.
*
* Sensor Voltage Mode Temp Mode Notes (from the datasheet)
* -------- ------------ --------- --------------------------
* Reading 1 temp1 Intel thermal diode
* Reading 3 temp2 Internal thermal diode
* UCH1/Reading2 in0 temp3 NTC type thermistor
* UCH2 in1 temp4 +2.5V
* UCH3 in2 temp5 VccP
* UCH4 in3 temp6 +5V
* UCH5 in4 temp7 +12V
* 3.3V in5 Internal VDD (+3.3V)
*
* --------------------------------------------------------------------- */
/* Voltages (in) numbered 0-5 (ix) */
#define VT1211_REG_IN(ix) (0x21 + (ix))
#define VT1211_REG_IN_MIN(ix) ((ix) == 0 ? 0x3e : 0x2a + 2 * (ix))
#define VT1211_REG_IN_MAX(ix) ((ix) == 0 ? 0x3d : 0x29 + 2 * (ix))
/* Temperatures (temp) numbered 0-6 (ix) */
static u8 regtemp[] = {0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25};
static u8 regtempmax[] = {0x39, 0x1d, 0x3d, 0x2b, 0x2d, 0x2f, 0x31};
static u8 regtemphyst[] = {0x3a, 0x1e, 0x3e, 0x2c, 0x2e, 0x30, 0x32};
/* Fans numbered 0-1 (ix) */
#define VT1211_REG_FAN(ix) (0x29 + (ix))
#define VT1211_REG_FAN_MIN(ix) (0x3b + (ix))
#define VT1211_REG_FAN_DIV 0x47
/* PWMs numbered 0-1 (ix) */
/* Auto points numbered 0-3 (ap) */
#define VT1211_REG_PWM(ix) (0x60 + (ix))
#define VT1211_REG_PWM_CLK 0x50
#define VT1211_REG_PWM_CTL 0x51
#define VT1211_REG_PWM_AUTO_TEMP(ap) (0x55 - (ap))
#define VT1211_REG_PWM_AUTO_PWM(ix, ap) (0x58 + 2 * (ix) - (ap))
/* Miscellaneous registers */
#define VT1211_REG_CONFIG 0x40
#define VT1211_REG_ALARM1 0x41
#define VT1211_REG_ALARM2 0x42
#define VT1211_REG_VID 0x45
#define VT1211_REG_UCH_CONFIG 0x4a
#define VT1211_REG_TEMP1_CONFIG 0x4b
#define VT1211_REG_TEMP2_CONFIG 0x4c
/* In, temp & fan alarm bits */
static const u8 bitalarmin[] = {11, 0, 1, 3, 8, 2, 9};
static const u8 bitalarmtemp[] = {4, 15, 11, 0, 1, 3, 8};
static const u8 bitalarmfan[] = {6, 7};
/* ---------------------------------------------------------------------
* Data structures and manipulation thereof
* --------------------------------------------------------------------- */
struct vt1211_data {
unsigned short addr;
const char *name;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
/* Register values */
u8 in[6];
u8 in_max[6];
u8 in_min[6];
u8 temp[7];
u8 temp_max[7];
u8 temp_hyst[7];
u8 fan[2];
u8 fan_min[2];
u8 fan_div[2];
u8 fan_ctl;
u8 pwm[2];
u8 pwm_ctl[2];
u8 pwm_clk;
u8 pwm_auto_temp[4];
u8 pwm_auto_pwm[2][4];
u8 vid; /* Read once at init time */
u8 vrm;
u8 uch_config; /* Read once at init time */
u16 alarms;
};
/* ix = [0-5] */
#define ISVOLT(ix, uch_config) ((ix) > 4 ? 1 : \
!(((uch_config) >> ((ix) + 2)) & 1))
/* ix = [0-6] */
#define ISTEMP(ix, uch_config) ((ix) < 2 ? 1 : \
((uch_config) >> (ix)) & 1)
/* in5 (ix = 5) is special. It's the internal 3.3V so it's scaled in the
driver according to the VT1211 BIOS porting guide */
#define IN_FROM_REG(ix, reg) ((reg) < 3 ? 0 : (ix) == 5 ? \
(((reg) - 3) * 15882 + 479) / 958 : \
(((reg) - 3) * 10000 + 479) / 958)
#define IN_TO_REG(ix, val) (SENSORS_LIMIT((ix) == 5 ? \
((val) * 958 + 7941) / 15882 + 3 : \
((val) * 958 + 5000) / 10000 + 3, 0, 255))
/* temp1 (ix = 0) is an intel thermal diode which is scaled in user space.
temp2 (ix = 1) is the internal temp diode so it's scaled in the driver
according to some measurements that I took on an EPIA M10000.
temp3-7 are thermistor based so the driver returns the voltage measured at
the pin (range 0V - 2.2V). */
#define TEMP_FROM_REG(ix, reg) ((ix) == 0 ? (reg) * 1000 : \
(ix) == 1 ? (reg) < 51 ? 0 : \
((reg) - 51) * 1000 : \
((253 - (reg)) * 2200 + 105) / 210)
#define TEMP_TO_REG(ix, val) SENSORS_LIMIT( \
((ix) == 0 ? ((val) + 500) / 1000 : \
(ix) == 1 ? ((val) + 500) / 1000 + 51 : \
253 - ((val) * 210 + 1100) / 2200), 0, 255)
#define DIV_FROM_REG(reg) (1 << (reg))
#define RPM_FROM_REG(reg, div) (((reg) == 0) || ((reg) == 255) ? 0 : \
1310720 / (reg) / DIV_FROM_REG(div))
#define RPM_TO_REG(val, div) ((val) == 0 ? 255 : \
SENSORS_LIMIT((1310720 / (val) / \
DIV_FROM_REG(div)), 1, 254))
/* ---------------------------------------------------------------------
* Super-I/O constants and functions
* --------------------------------------------------------------------- */
/* Configuration index port registers
* The vt1211 can live at 2 different addresses so we need to probe both */
#define SIO_REG_CIP1 0x2e
#define SIO_REG_CIP2 0x4e
/* Configuration registers */
#define SIO_VT1211_LDN 0x07 /* logical device number */
#define SIO_VT1211_DEVID 0x20 /* device ID */
#define SIO_VT1211_DEVREV 0x21 /* device revision */
#define SIO_VT1211_ACTIVE 0x30 /* HW monitor active */
#define SIO_VT1211_BADDR 0x60 /* base I/O address */
#define SIO_VT1211_ID 0x3c /* VT1211 device ID */
/* VT1211 logical device numbers */
#define SIO_VT1211_LDN_HWMON 0x0b /* HW monitor */
static inline void superio_outb(int sio_cip, int reg, int val)
{
outb(reg, sio_cip);
outb(val, sio_cip + 1);
}
static inline int superio_inb(int sio_cip, int reg)
{
outb(reg, sio_cip);
return inb(sio_cip + 1);
}
static inline void superio_select(int sio_cip, int ldn)
{
outb(SIO_VT1211_LDN, sio_cip);
outb(ldn, sio_cip + 1);
}
static inline void superio_enter(int sio_cip)
{
outb(0x87, sio_cip);
outb(0x87, sio_cip);
}
static inline void superio_exit(int sio_cip)
{
outb(0xaa, sio_cip);
}
/* ---------------------------------------------------------------------
* Device I/O access
* --------------------------------------------------------------------- */
static inline u8 vt1211_read8(struct vt1211_data *data, u8 reg)
{
return inb(data->addr + reg);
}
static inline void vt1211_write8(struct vt1211_data *data, u8 reg, u8 val)
{
outb(val, data->addr + reg);
}
static struct vt1211_data *vt1211_update_device(struct device *dev)
{
struct vt1211_data *data = dev_get_drvdata(dev);
int ix, val;
mutex_lock(&data->update_lock);
/* registers cache is refreshed after 1 second */
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
/* read VID */
data->vid = vt1211_read8(data, VT1211_REG_VID) & 0x1f;
/* voltage (in) registers */
for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
if (ISVOLT(ix, data->uch_config)) {
data->in[ix] = vt1211_read8(data,
VT1211_REG_IN(ix));
data->in_min[ix] = vt1211_read8(data,
VT1211_REG_IN_MIN(ix));
data->in_max[ix] = vt1211_read8(data,
VT1211_REG_IN_MAX(ix));
}
}
/* temp registers */
for (ix = 0; ix < ARRAY_SIZE(data->temp); ix++) {
if (ISTEMP(ix, data->uch_config)) {
data->temp[ix] = vt1211_read8(data,
regtemp[ix]);
data->temp_max[ix] = vt1211_read8(data,
regtempmax[ix]);
data->temp_hyst[ix] = vt1211_read8(data,
regtemphyst[ix]);
}
}
/* fan & pwm registers */
for (ix = 0; ix < ARRAY_SIZE(data->fan); ix++) {
data->fan[ix] = vt1211_read8(data,
VT1211_REG_FAN(ix));
data->fan_min[ix] = vt1211_read8(data,
VT1211_REG_FAN_MIN(ix));
data->pwm[ix] = vt1211_read8(data,
VT1211_REG_PWM(ix));
}
val = vt1211_read8(data, VT1211_REG_FAN_DIV);
data->fan_div[0] = (val >> 4) & 3;
data->fan_div[1] = (val >> 6) & 3;
data->fan_ctl = val & 0xf;
val = vt1211_read8(data, VT1211_REG_PWM_CTL);
data->pwm_ctl[0] = val & 0xf;
data->pwm_ctl[1] = (val >> 4) & 0xf;
data->pwm_clk = vt1211_read8(data, VT1211_REG_PWM_CLK);
/* pwm & temp auto point registers */
data->pwm_auto_pwm[0][1] = vt1211_read8(data,
VT1211_REG_PWM_AUTO_PWM(0, 1));
data->pwm_auto_pwm[0][2] = vt1211_read8(data,
VT1211_REG_PWM_AUTO_PWM(0, 2));
data->pwm_auto_pwm[1][1] = vt1211_read8(data,
VT1211_REG_PWM_AUTO_PWM(1, 1));
data->pwm_auto_pwm[1][2] = vt1211_read8(data,
VT1211_REG_PWM_AUTO_PWM(1, 2));
for (ix = 0; ix < ARRAY_SIZE(data->pwm_auto_temp); ix++) {
data->pwm_auto_temp[ix] = vt1211_read8(data,
VT1211_REG_PWM_AUTO_TEMP(ix));
}
/* alarm registers */
data->alarms = (vt1211_read8(data, VT1211_REG_ALARM2) << 8) |
vt1211_read8(data, VT1211_REG_ALARM1);
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
/* ---------------------------------------------------------------------
* Voltage sysfs interfaces
* ix = [0-5]
* --------------------------------------------------------------------- */
#define SHOW_IN_INPUT 0
#define SHOW_SET_IN_MIN 1
#define SHOW_SET_IN_MAX 2
#define SHOW_IN_ALARM 3
static ssize_t show_in(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct vt1211_data *data = vt1211_update_device(dev);
struct sensor_device_attribute_2 *sensor_attr_2 =
to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
int res;
switch (fn) {
case SHOW_IN_INPUT:
res = IN_FROM_REG(ix, data->in[ix]);
break;
case SHOW_SET_IN_MIN:
res = IN_FROM_REG(ix, data->in_min[ix]);
break;
case SHOW_SET_IN_MAX:
res = IN_FROM_REG(ix, data->in_max[ix]);
break;
case SHOW_IN_ALARM:
res = (data->alarms >> bitalarmin[ix]) & 1;
break;
default:
res = 0;
dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
}
return sprintf(buf, "%d\n", res);
}
static ssize_t set_in(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct vt1211_data *data = dev_get_drvdata(dev);
struct sensor_device_attribute_2 *sensor_attr_2 =
to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
switch (fn) {
case SHOW_SET_IN_MIN:
data->in_min[ix] = IN_TO_REG(ix, val);
vt1211_write8(data, VT1211_REG_IN_MIN(ix), data->in_min[ix]);
break;
case SHOW_SET_IN_MAX:
data->in_max[ix] = IN_TO_REG(ix, val);
vt1211_write8(data, VT1211_REG_IN_MAX(ix), data->in_max[ix]);
break;
default:
dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
}
mutex_unlock(&data->update_lock);
return count;
}
/* ---------------------------------------------------------------------
* Temperature sysfs interfaces
* ix = [0-6]
* --------------------------------------------------------------------- */
#define SHOW_TEMP_INPUT 0
#define SHOW_SET_TEMP_MAX 1
#define SHOW_SET_TEMP_MAX_HYST 2
#define SHOW_TEMP_ALARM 3
static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct vt1211_data *data = vt1211_update_device(dev);
struct sensor_device_attribute_2 *sensor_attr_2 =
to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
int res;
switch (fn) {
case SHOW_TEMP_INPUT:
res = TEMP_FROM_REG(ix, data->temp[ix]);
break;
case SHOW_SET_TEMP_MAX:
res = TEMP_FROM_REG(ix, data->temp_max[ix]);
break;
case SHOW_SET_TEMP_MAX_HYST:
res = TEMP_FROM_REG(ix, data->temp_hyst[ix]);
break;
case SHOW_TEMP_ALARM:
res = (data->alarms >> bitalarmtemp[ix]) & 1;
break;
default:
res = 0;
dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
}
return sprintf(buf, "%d\n", res);
}
static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct vt1211_data *data = dev_get_drvdata(dev);
struct sensor_device_attribute_2 *sensor_attr_2 =
to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
switch (fn) {
case SHOW_SET_TEMP_MAX:
data->temp_max[ix] = TEMP_TO_REG(ix, val);
vt1211_write8(data, regtempmax[ix],
data->temp_max[ix]);
break;
case SHOW_SET_TEMP_MAX_HYST:
data->temp_hyst[ix] = TEMP_TO_REG(ix, val);
vt1211_write8(data, regtemphyst[ix],
data->temp_hyst[ix]);
break;
default:
dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
}
mutex_unlock(&data->update_lock);
return count;
}
/* ---------------------------------------------------------------------
* Fan sysfs interfaces
* ix = [0-1]
* --------------------------------------------------------------------- */
#define SHOW_FAN_INPUT 0
#define SHOW_SET_FAN_MIN 1
#define SHOW_SET_FAN_DIV 2
#define SHOW_FAN_ALARM 3
static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct vt1211_data *data = vt1211_update_device(dev);
struct sensor_device_attribute_2 *sensor_attr_2 =
to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
int res;
switch (fn) {
case SHOW_FAN_INPUT:
res = RPM_FROM_REG(data->fan[ix], data->fan_div[ix]);
break;
case SHOW_SET_FAN_MIN:
res = RPM_FROM_REG(data->fan_min[ix], data->fan_div[ix]);
break;
case SHOW_SET_FAN_DIV:
res = DIV_FROM_REG(data->fan_div[ix]);
break;
case SHOW_FAN_ALARM:
res = (data->alarms >> bitalarmfan[ix]) & 1;
break;
default:
res = 0;
dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
}
return sprintf(buf, "%d\n", res);
}
static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct vt1211_data *data = dev_get_drvdata(dev);
struct sensor_device_attribute_2 *sensor_attr_2 =
to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
long val = simple_strtol(buf, NULL, 10);
int reg;
mutex_lock(&data->update_lock);
/* sync the data cache */
reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
data->fan_div[0] = (reg >> 4) & 3;
data->fan_div[1] = (reg >> 6) & 3;
data->fan_ctl = reg & 0xf;
switch (fn) {
case SHOW_SET_FAN_MIN:
data->fan_min[ix] = RPM_TO_REG(val, data->fan_div[ix]);
vt1211_write8(data, VT1211_REG_FAN_MIN(ix),
data->fan_min[ix]);
break;
case SHOW_SET_FAN_DIV:
switch (val) {
case 1: data->fan_div[ix] = 0; break;
case 2: data->fan_div[ix] = 1; break;
case 4: data->fan_div[ix] = 2; break;
case 8: data->fan_div[ix] = 3; break;
default:
count = -EINVAL;
dev_warn(dev, "fan div value %ld not "
"supported. Choose one of 1, 2, "
"4, or 8.\n", val);
goto EXIT;
}
vt1211_write8(data, VT1211_REG_FAN_DIV,
((data->fan_div[1] << 6) |
(data->fan_div[0] << 4) |
data->fan_ctl));
break;
default:
dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
}
EXIT:
mutex_unlock(&data->update_lock);
return count;
}
/* ---------------------------------------------------------------------
* PWM sysfs interfaces
* ix = [0-1]
* --------------------------------------------------------------------- */
#define SHOW_PWM 0
#define SHOW_SET_PWM_ENABLE 1
#define SHOW_SET_PWM_FREQ 2
#define SHOW_SET_PWM_AUTO_CHANNELS_TEMP 3
static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct vt1211_data *data = vt1211_update_device(dev);
struct sensor_device_attribute_2 *sensor_attr_2 =
to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
int res;
switch (fn) {
case SHOW_PWM:
res = data->pwm[ix];
break;
case SHOW_SET_PWM_ENABLE:
res = ((data->pwm_ctl[ix] >> 3) & 1) ? 2 : 0;
break;
case SHOW_SET_PWM_FREQ:
res = 90000 >> (data->pwm_clk & 7);
break;
case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
res = (data->pwm_ctl[ix] & 7) + 1;
break;
default:
res = 0;
dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
}
return sprintf(buf, "%d\n", res);
}
static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct vt1211_data *data = dev_get_drvdata(dev);
struct sensor_device_attribute_2 *sensor_attr_2 =
to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int fn = sensor_attr_2->nr;
long val = simple_strtol(buf, NULL, 10);
int tmp, reg;
mutex_lock(&data->update_lock);
switch (fn) {
case SHOW_SET_PWM_ENABLE:
/* sync the data cache */
reg = vt1211_read8(data, VT1211_REG_FAN_DIV);
data->fan_div[0] = (reg >> 4) & 3;
data->fan_div[1] = (reg >> 6) & 3;
data->fan_ctl = reg & 0xf;
reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
data->pwm_ctl[0] = reg & 0xf;
data->pwm_ctl[1] = (reg >> 4) & 0xf;
switch (val) {
case 0:
data->pwm_ctl[ix] &= 7;
/* disable SmartGuardian if both PWM outputs are
* disabled */
if ((data->pwm_ctl[ix ^ 1] & 1) == 0) {
data->fan_ctl &= 0xe;
}
break;
case 2:
data->pwm_ctl[ix] |= 8;
data->fan_ctl |= 1;
break;
default:
count = -EINVAL;
dev_warn(dev, "pwm mode %ld not supported. "
"Choose one of 0 or 2.\n", val);
goto EXIT;
}
vt1211_write8(data, VT1211_REG_PWM_CTL,
((data->pwm_ctl[1] << 4) |
data->pwm_ctl[0]));
vt1211_write8(data, VT1211_REG_FAN_DIV,
((data->fan_div[1] << 6) |
(data->fan_div[0] << 4) |
data->fan_ctl));
break;
case SHOW_SET_PWM_FREQ:
val = 135000 / SENSORS_LIMIT(val, 135000 >> 7, 135000);
/* calculate tmp = log2(val) */
tmp = 0;
for (val >>= 1; val > 0; val >>= 1) {
tmp++;
}
/* sync the data cache */
reg = vt1211_read8(data, VT1211_REG_PWM_CLK);
data->pwm_clk = (reg & 0xf8) | tmp;
vt1211_write8(data, VT1211_REG_PWM_CLK, data->pwm_clk);
break;
case SHOW_SET_PWM_AUTO_CHANNELS_TEMP:
if ((val < 1) || (val > 7)) {
count = -EINVAL;
dev_warn(dev, "temp channel %ld not supported. "
"Choose a value between 1 and 7.\n", val);
goto EXIT;
}
if (!ISTEMP(val - 1, data->uch_config)) {
count = -EINVAL;
dev_warn(dev, "temp channel %ld is not available.\n",
val);
goto EXIT;
}
/* sync the data cache */
reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
data->pwm_ctl[0] = reg & 0xf;
data->pwm_ctl[1] = (reg >> 4) & 0xf;
data->pwm_ctl[ix] = (data->pwm_ctl[ix] & 8) | (val - 1);
vt1211_write8(data, VT1211_REG_PWM_CTL,
((data->pwm_ctl[1] << 4) | data->pwm_ctl[0]));
break;
default:
dev_dbg(dev, "Unknown attr fetch (%d)\n", fn);
}
EXIT:
mutex_unlock(&data->update_lock);
return count;
}
/* ---------------------------------------------------------------------
* PWM auto point definitions
* ix = [0-1]
* ap = [0-3]
* --------------------------------------------------------------------- */
/*
* pwm[ix+1]_auto_point[ap+1]_temp mapping table:
* Note that there is only a single set of temp auto points that controls both
* PWM controllers. We still create 2 sets of sysfs files to make it look
* more consistent even though they map to the same registers.
*
* ix ap : description
* -------------------
* 0 0 : pwm1/2 off temperature (pwm_auto_temp[0])
* 0 1 : pwm1/2 low speed temperature (pwm_auto_temp[1])
* 0 2 : pwm1/2 high speed temperature (pwm_auto_temp[2])
* 0 3 : pwm1/2 full speed temperature (pwm_auto_temp[3])
* 1 0 : pwm1/2 off temperature (pwm_auto_temp[0])
* 1 1 : pwm1/2 low speed temperature (pwm_auto_temp[1])
* 1 2 : pwm1/2 high speed temperature (pwm_auto_temp[2])
* 1 3 : pwm1/2 full speed temperature (pwm_auto_temp[3])
*/
static ssize_t show_pwm_auto_point_temp(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct vt1211_data *data = vt1211_update_device(dev);
struct sensor_device_attribute_2 *sensor_attr_2 =
to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int ap = sensor_attr_2->nr;
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->pwm_ctl[ix] & 7,
data->pwm_auto_temp[ap]));
}
static ssize_t set_pwm_auto_point_temp(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct vt1211_data *data = dev_get_drvdata(dev);
struct sensor_device_attribute_2 *sensor_attr_2 =
to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int ap = sensor_attr_2->nr;
long val = simple_strtol(buf, NULL, 10);
int reg;
mutex_lock(&data->update_lock);
/* sync the data cache */
reg = vt1211_read8(data, VT1211_REG_PWM_CTL);
data->pwm_ctl[0] = reg & 0xf;
data->pwm_ctl[1] = (reg >> 4) & 0xf;
data->pwm_auto_temp[ap] = TEMP_TO_REG(data->pwm_ctl[ix] & 7, val);
vt1211_write8(data, VT1211_REG_PWM_AUTO_TEMP(ap),
data->pwm_auto_temp[ap]);
mutex_unlock(&data->update_lock);
return count;
}
/*
* pwm[ix+1]_auto_point[ap+1]_pwm mapping table:
* Note that the PWM auto points 0 & 3 are hard-wired in the VT1211 and can't
* be changed.
*
* ix ap : description
* -------------------
* 0 0 : pwm1 off (pwm_auto_pwm[0][0], hard-wired to 0)
* 0 1 : pwm1 low speed duty cycle (pwm_auto_pwm[0][1])
* 0 2 : pwm1 high speed duty cycle (pwm_auto_pwm[0][2])
* 0 3 : pwm1 full speed (pwm_auto_pwm[0][3], hard-wired to 255)
* 1 0 : pwm2 off (pwm_auto_pwm[1][0], hard-wired to 0)
* 1 1 : pwm2 low speed duty cycle (pwm_auto_pwm[1][1])
* 1 2 : pwm2 high speed duty cycle (pwm_auto_pwm[1][2])
* 1 3 : pwm2 full speed (pwm_auto_pwm[1][3], hard-wired to 255)
*/
static ssize_t show_pwm_auto_point_pwm(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct vt1211_data *data = vt1211_update_device(dev);
struct sensor_device_attribute_2 *sensor_attr_2 =
to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int ap = sensor_attr_2->nr;
return sprintf(buf, "%d\n", data->pwm_auto_pwm[ix][ap]);
}
static ssize_t set_pwm_auto_point_pwm(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct vt1211_data *data = dev_get_drvdata(dev);
struct sensor_device_attribute_2 *sensor_attr_2 =
to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
int ap = sensor_attr_2->nr;
long val = simple_strtol(buf, NULL, 10);
if ((val < 0) || (val > 255)) {
dev_err(dev, "pwm value %ld is out of range. "
"Choose a value between 0 and 255.\n" , val);
return -EINVAL;
}
mutex_lock(&data->update_lock);
data->pwm_auto_pwm[ix][ap] = val;
vt1211_write8(data, VT1211_REG_PWM_AUTO_PWM(ix, ap),
data->pwm_auto_pwm[ix][ap]);
mutex_unlock(&data->update_lock);
return count;
}
/* ---------------------------------------------------------------------
* Miscellaneous sysfs interfaces (VRM, VID, name, and (legacy) alarms)
* --------------------------------------------------------------------- */
static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct vt1211_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", data->vrm);
}
static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct vt1211_data *data = dev_get_drvdata(dev);
long val = simple_strtol(buf, NULL, 10);
data->vrm = val;
return count;
}
static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct vt1211_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
}
static ssize_t show_name(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct vt1211_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%s\n", data->name);
}
static ssize_t show_alarms(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct vt1211_data *data = vt1211_update_device(dev);
return sprintf(buf, "%d\n", data->alarms);
}
/* ---------------------------------------------------------------------
* Device attribute structs
* --------------------------------------------------------------------- */
#define SENSOR_ATTR_IN_INPUT(ix) \
SENSOR_ATTR_2(in##ix##_input, S_IRUGO, \
show_in, NULL, SHOW_IN_INPUT, ix)
static struct sensor_device_attribute_2 vt1211_sysfs_in_input[] = {
SENSOR_ATTR_IN_INPUT(0),
SENSOR_ATTR_IN_INPUT(1),
SENSOR_ATTR_IN_INPUT(2),
SENSOR_ATTR_IN_INPUT(3),
SENSOR_ATTR_IN_INPUT(4),
SENSOR_ATTR_IN_INPUT(5),
};
#define SENSOR_ATTR_IN_MIN(ix) \
SENSOR_ATTR_2(in##ix##_min, S_IRUGO | S_IWUSR, \
show_in, set_in, SHOW_SET_IN_MIN, ix)
static struct sensor_device_attribute_2 vt1211_sysfs_in_min[] = {
SENSOR_ATTR_IN_MIN(0),
SENSOR_ATTR_IN_MIN(1),
SENSOR_ATTR_IN_MIN(2),
SENSOR_ATTR_IN_MIN(3),
SENSOR_ATTR_IN_MIN(4),
SENSOR_ATTR_IN_MIN(5),
};
#define SENSOR_ATTR_IN_MAX(ix) \
SENSOR_ATTR_2(in##ix##_max, S_IRUGO | S_IWUSR, \
show_in, set_in, SHOW_SET_IN_MAX, ix)
static struct sensor_device_attribute_2 vt1211_sysfs_in_max[] = {
SENSOR_ATTR_IN_MAX(0),
SENSOR_ATTR_IN_MAX(1),
SENSOR_ATTR_IN_MAX(2),
SENSOR_ATTR_IN_MAX(3),
SENSOR_ATTR_IN_MAX(4),
SENSOR_ATTR_IN_MAX(5),
};
#define SENSOR_ATTR_IN_ALARM(ix) \
SENSOR_ATTR_2(in##ix##_alarm, S_IRUGO, \
show_in, NULL, SHOW_IN_ALARM, ix)
static struct sensor_device_attribute_2 vt1211_sysfs_in_alarm[] = {
SENSOR_ATTR_IN_ALARM(0),
SENSOR_ATTR_IN_ALARM(1),
SENSOR_ATTR_IN_ALARM(2),
SENSOR_ATTR_IN_ALARM(3),
SENSOR_ATTR_IN_ALARM(4),
SENSOR_ATTR_IN_ALARM(5),
};
#define SENSOR_ATTR_TEMP_INPUT(ix) \
SENSOR_ATTR_2(temp##ix##_input, S_IRUGO, \
show_temp, NULL, SHOW_TEMP_INPUT, ix-1)
static struct sensor_device_attribute_2 vt1211_sysfs_temp_input[] = {
SENSOR_ATTR_TEMP_INPUT(1),
SENSOR_ATTR_TEMP_INPUT(2),
SENSOR_ATTR_TEMP_INPUT(3),
SENSOR_ATTR_TEMP_INPUT(4),
SENSOR_ATTR_TEMP_INPUT(5),
SENSOR_ATTR_TEMP_INPUT(6),
SENSOR_ATTR_TEMP_INPUT(7),
};
#define SENSOR_ATTR_TEMP_MAX(ix) \
SENSOR_ATTR_2(temp##ix##_max, S_IRUGO | S_IWUSR, \
show_temp, set_temp, SHOW_SET_TEMP_MAX, ix-1)
static struct sensor_device_attribute_2 vt1211_sysfs_temp_max[] = {
SENSOR_ATTR_TEMP_MAX(1),
SENSOR_ATTR_TEMP_MAX(2),
SENSOR_ATTR_TEMP_MAX(3),
SENSOR_ATTR_TEMP_MAX(4),
SENSOR_ATTR_TEMP_MAX(5),
SENSOR_ATTR_TEMP_MAX(6),
SENSOR_ATTR_TEMP_MAX(7),
};
#define SENSOR_ATTR_TEMP_MAX_HYST(ix) \
SENSOR_ATTR_2(temp##ix##_max_hyst, S_IRUGO | S_IWUSR, \
show_temp, set_temp, SHOW_SET_TEMP_MAX_HYST, ix-1)
static struct sensor_device_attribute_2 vt1211_sysfs_temp_max_hyst[] = {
SENSOR_ATTR_TEMP_MAX_HYST(1),
SENSOR_ATTR_TEMP_MAX_HYST(2),
SENSOR_ATTR_TEMP_MAX_HYST(3),
SENSOR_ATTR_TEMP_MAX_HYST(4),
SENSOR_ATTR_TEMP_MAX_HYST(5),
SENSOR_ATTR_TEMP_MAX_HYST(6),
SENSOR_ATTR_TEMP_MAX_HYST(7),
};
#define SENSOR_ATTR_TEMP_ALARM(ix) \
SENSOR_ATTR_2(temp##ix##_alarm, S_IRUGO, \
show_temp, NULL, SHOW_TEMP_ALARM, ix-1)
static struct sensor_device_attribute_2 vt1211_sysfs_temp_alarm[] = {
SENSOR_ATTR_TEMP_ALARM(1),
SENSOR_ATTR_TEMP_ALARM(2),
SENSOR_ATTR_TEMP_ALARM(3),
SENSOR_ATTR_TEMP_ALARM(4),
SENSOR_ATTR_TEMP_ALARM(5),
SENSOR_ATTR_TEMP_ALARM(6),
SENSOR_ATTR_TEMP_ALARM(7),
};
#define SENSOR_ATTR_FAN(ix) \
SENSOR_ATTR_2(fan##ix##_input, S_IRUGO, \
show_fan, NULL, SHOW_FAN_INPUT, ix-1), \
SENSOR_ATTR_2(fan##ix##_min, S_IRUGO | S_IWUSR, \
show_fan, set_fan, SHOW_SET_FAN_MIN, ix-1), \
SENSOR_ATTR_2(fan##ix##_div, S_IRUGO | S_IWUSR, \
show_fan, set_fan, SHOW_SET_FAN_DIV, ix-1), \
SENSOR_ATTR_2(fan##ix##_alarm, S_IRUGO, \
show_fan, NULL, SHOW_FAN_ALARM, ix-1)
#define SENSOR_ATTR_PWM(ix) \
SENSOR_ATTR_2(pwm##ix, S_IRUGO, \
show_pwm, NULL, SHOW_PWM, ix-1), \
SENSOR_ATTR_2(pwm##ix##_enable, S_IRUGO | S_IWUSR, \
show_pwm, set_pwm, SHOW_SET_PWM_ENABLE, ix-1), \
SENSOR_ATTR_2(pwm##ix##_auto_channels_temp, S_IRUGO | S_IWUSR, \
show_pwm, set_pwm, SHOW_SET_PWM_AUTO_CHANNELS_TEMP, ix-1)
#define SENSOR_ATTR_PWM_FREQ(ix) \
SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO | S_IWUSR, \
show_pwm, set_pwm, SHOW_SET_PWM_FREQ, ix-1)
#define SENSOR_ATTR_PWM_FREQ_RO(ix) \
SENSOR_ATTR_2(pwm##ix##_freq, S_IRUGO, \
show_pwm, NULL, SHOW_SET_PWM_FREQ, ix-1)
#define SENSOR_ATTR_PWM_AUTO_POINT_TEMP(ix, ap) \
SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO | S_IWUSR, \
show_pwm_auto_point_temp, set_pwm_auto_point_temp, \
ap-1, ix-1)
#define SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(ix, ap) \
SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_temp, S_IRUGO, \
show_pwm_auto_point_temp, NULL, \
ap-1, ix-1)
#define SENSOR_ATTR_PWM_AUTO_POINT_PWM(ix, ap) \
SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO | S_IWUSR, \
show_pwm_auto_point_pwm, set_pwm_auto_point_pwm, \
ap-1, ix-1)
#define SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(ix, ap) \
SENSOR_ATTR_2(pwm##ix##_auto_point##ap##_pwm, S_IRUGO, \
show_pwm_auto_point_pwm, NULL, \
ap-1, ix-1)
static struct sensor_device_attribute_2 vt1211_sysfs_fan_pwm[] = {
SENSOR_ATTR_FAN(1),
SENSOR_ATTR_FAN(2),
SENSOR_ATTR_PWM(1),
SENSOR_ATTR_PWM(2),
SENSOR_ATTR_PWM_FREQ(1),
SENSOR_ATTR_PWM_FREQ_RO(2),
SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 1),
SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 2),
SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 3),
SENSOR_ATTR_PWM_AUTO_POINT_TEMP(1, 4),
SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 1),
SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 2),
SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 3),
SENSOR_ATTR_PWM_AUTO_POINT_TEMP_RO(2, 4),
SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 1),
SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 2),
SENSOR_ATTR_PWM_AUTO_POINT_PWM(1, 3),
SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(1, 4),
SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 1),
SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 2),
SENSOR_ATTR_PWM_AUTO_POINT_PWM(2, 3),
SENSOR_ATTR_PWM_AUTO_POINT_PWM_RO(2, 4),
};
static struct device_attribute vt1211_sysfs_misc[] = {
__ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm),
__ATTR(cpu0_vid, S_IRUGO, show_vid, NULL),
__ATTR(name, S_IRUGO, show_name, NULL),
__ATTR(alarms, S_IRUGO, show_alarms, NULL),
};
/* ---------------------------------------------------------------------
* Device registration and initialization
* --------------------------------------------------------------------- */
static void __devinit vt1211_init_device(struct vt1211_data *data)
{
/* set VRM */
data->vrm = vid_which_vrm();
/* Read (and initialize) UCH config */
data->uch_config = vt1211_read8(data, VT1211_REG_UCH_CONFIG);
if (uch_config > -1) {
data->uch_config = (data->uch_config & 0x83) |
(uch_config << 2);
vt1211_write8(data, VT1211_REG_UCH_CONFIG, data->uch_config);
}
/* Initialize the interrupt mode (if request at module load time).
* The VT1211 implements 3 different modes for clearing interrupts:
* 0: Clear INT when status register is read. Regenerate INT as long
* as temp stays above hysteresis limit.
* 1: Clear INT when status register is read. DON'T regenerate INT
* until temp falls below hysteresis limit and exceeds hot limit
* again.
* 2: Clear INT when temp falls below max limit.
*
* The driver only allows to force mode 0 since that's the only one
* that makes sense for 'sensors' */
if (int_mode == 0) {
vt1211_write8(data, VT1211_REG_TEMP1_CONFIG, 0);
vt1211_write8(data, VT1211_REG_TEMP2_CONFIG, 0);
}
/* Fill in some hard wired values into our data struct */
data->pwm_auto_pwm[0][3] = 255;
data->pwm_auto_pwm[1][3] = 255;
}
static void vt1211_remove_sysfs(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
int i;
for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_in_input); i++) {
device_remove_file(dev,
&vt1211_sysfs_in_input[i].dev_attr);
device_remove_file(dev,
&vt1211_sysfs_in_min[i].dev_attr);
device_remove_file(dev,
&vt1211_sysfs_in_max[i].dev_attr);
device_remove_file(dev,
&vt1211_sysfs_in_alarm[i].dev_attr);
}
for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_temp_input); i++) {
device_remove_file(dev,
&vt1211_sysfs_temp_input[i].dev_attr);
device_remove_file(dev,
&vt1211_sysfs_temp_max[i].dev_attr);
device_remove_file(dev,
&vt1211_sysfs_temp_max_hyst[i].dev_attr);
device_remove_file(dev,
&vt1211_sysfs_temp_alarm[i].dev_attr);
}
for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
device_remove_file(dev,
&vt1211_sysfs_fan_pwm[i].dev_attr);
}
for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
device_remove_file(dev, &vt1211_sysfs_misc[i]);
}
}
static int __devinit vt1211_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct vt1211_data *data;
struct resource *res;
int i, err;
if (!(data = kzalloc(sizeof(struct vt1211_data), GFP_KERNEL))) {
err = -ENOMEM;
dev_err(dev, "Out of memory\n");
goto EXIT;
}
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!request_region(res->start, res->end - res->start + 1, DRVNAME)) {
err = -EBUSY;
dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
(unsigned long)res->start, (unsigned long)res->end);
goto EXIT_KFREE;
}
data->addr = res->start;
data->name = DRVNAME;
mutex_init(&data->update_lock);
platform_set_drvdata(pdev, data);
/* Initialize the VT1211 chip */
vt1211_init_device(data);
/* Create sysfs interface files */
for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_in_input); i++) {
if (ISVOLT(i, data->uch_config)) {
if ((err = device_create_file(dev,
&vt1211_sysfs_in_input[i].dev_attr)) ||
(err = device_create_file(dev,
&vt1211_sysfs_in_min[i].dev_attr)) ||
(err = device_create_file(dev,
&vt1211_sysfs_in_max[i].dev_attr)) ||
(err = device_create_file(dev,
&vt1211_sysfs_in_alarm[i].dev_attr))) {
goto EXIT_DEV_REMOVE;
}
}
}
for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_temp_input); i++) {
if (ISTEMP(i, data->uch_config)) {
if ((err = device_create_file(dev,
&vt1211_sysfs_temp_input[i].dev_attr)) ||
(err = device_create_file(dev,
&vt1211_sysfs_temp_max[i].dev_attr)) ||
(err = device_create_file(dev,
&vt1211_sysfs_temp_max_hyst[i].dev_attr)) ||
(err = device_create_file(dev,
&vt1211_sysfs_temp_alarm[i].dev_attr))) {
goto EXIT_DEV_REMOVE;
}
}
}
for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_fan_pwm); i++) {
err = device_create_file(dev,
&vt1211_sysfs_fan_pwm[i].dev_attr);
if (err) {
goto EXIT_DEV_REMOVE;
}
}
for (i = 0; i < ARRAY_SIZE(vt1211_sysfs_misc); i++) {
err = device_create_file(dev,
&vt1211_sysfs_misc[i]);
if (err) {
goto EXIT_DEV_REMOVE;
}
}
/* Register device */
data->hwmon_dev = hwmon_device_register(dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
dev_err(dev, "Class registration failed (%d)\n", err);
goto EXIT_DEV_REMOVE_SILENT;
}
return 0;
EXIT_DEV_REMOVE:
dev_err(dev, "Sysfs interface creation failed (%d)\n", err);
EXIT_DEV_REMOVE_SILENT:
vt1211_remove_sysfs(pdev);
release_region(res->start, res->end - res->start + 1);
EXIT_KFREE:
platform_set_drvdata(pdev, NULL);
kfree(data);
EXIT:
return err;
}
static int __devexit vt1211_remove(struct platform_device *pdev)
{
struct vt1211_data *data = platform_get_drvdata(pdev);
struct resource *res;
hwmon_device_unregister(data->hwmon_dev);
vt1211_remove_sysfs(pdev);
platform_set_drvdata(pdev, NULL);
kfree(data);
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
release_region(res->start, res->end - res->start + 1);
return 0;
}
static struct platform_driver vt1211_driver = {
.driver = {
.owner = THIS_MODULE,
.name = DRVNAME,
},
.probe = vt1211_probe,
.remove = __devexit_p(vt1211_remove),
};
static int __init vt1211_device_add(unsigned short address)
{
struct resource res = {
.start = address,
.end = address + 0x7f,
.flags = IORESOURCE_IO,
};
int err;
pdev = platform_device_alloc(DRVNAME, address);
if (!pdev) {
err = -ENOMEM;
printk(KERN_ERR DRVNAME ": Device allocation failed (%d)\n",
err);
goto EXIT;
}
res.name = pdev->name;
err = platform_device_add_resources(pdev, &res, 1);
if (err) {
printk(KERN_ERR DRVNAME ": Device resource addition failed "
"(%d)\n", err);
goto EXIT_DEV_PUT;
}
err = platform_device_add(pdev);
if (err) {
printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
err);
goto EXIT_DEV_PUT;
}
return 0;
EXIT_DEV_PUT:
platform_device_put(pdev);
EXIT:
return err;
}
static int __init vt1211_find(int sio_cip, unsigned short *address)
{
int err = -ENODEV;
int devid;
superio_enter(sio_cip);
devid = force_id ? force_id : superio_inb(sio_cip, SIO_VT1211_DEVID);
if (devid != SIO_VT1211_ID) {
goto EXIT;
}
superio_select(sio_cip, SIO_VT1211_LDN_HWMON);
if ((superio_inb(sio_cip, SIO_VT1211_ACTIVE) & 1) == 0) {
printk(KERN_WARNING DRVNAME ": HW monitor is disabled, "
"skipping\n");
goto EXIT;
}
*address = ((superio_inb(sio_cip, SIO_VT1211_BADDR) << 8) |
(superio_inb(sio_cip, SIO_VT1211_BADDR + 1))) & 0xff00;
if (*address == 0) {
printk(KERN_WARNING DRVNAME ": Base address is not set, "
"skipping\n");
goto EXIT;
}
err = 0;
printk(KERN_INFO DRVNAME ": Found VT1211 chip at 0x%04x, "
"revision %u\n", *address,
superio_inb(sio_cip, SIO_VT1211_DEVREV));
EXIT:
superio_exit(sio_cip);
return err;
}
static int __init vt1211_init(void)
{
int err;
unsigned short address = 0;
if ((err = vt1211_find(SIO_REG_CIP1, &address)) &&
(err = vt1211_find(SIO_REG_CIP2, &address))) {
goto EXIT;
}
if ((uch_config < -1) || (uch_config > 31)) {
err = -EINVAL;
printk(KERN_WARNING DRVNAME ": Invalid UCH configuration %d. "
"Choose a value between 0 and 31.\n", uch_config);
goto EXIT;
}
if ((int_mode < -1) || (int_mode > 0)) {
err = -EINVAL;
printk(KERN_WARNING DRVNAME ": Invalid interrupt mode %d. "
"Only mode 0 is supported.\n", int_mode);
goto EXIT;
}
err = platform_driver_register(&vt1211_driver);
if (err) {
goto EXIT;
}
/* Sets global pdev as a side effect */
err = vt1211_device_add(address);
if (err) {
goto EXIT_DRV_UNREGISTER;
}
return 0;
EXIT_DRV_UNREGISTER:
platform_driver_unregister(&vt1211_driver);
EXIT:
return err;
}
static void __exit vt1211_exit(void)
{
platform_device_unregister(pdev);
platform_driver_unregister(&vt1211_driver);
}
MODULE_AUTHOR("Juerg Haefliger <juergh@gmail.com>");
MODULE_DESCRIPTION("VT1211 sensors");
MODULE_LICENSE("GPL");
module_init(vt1211_init);
module_exit(vt1211_exit);
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