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applesmc.c
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/*
* drivers/hwmon/applesmc.c - driver for Apple's SMC (accelerometer, temperature
* sensors, fan control, keyboard backlight control) used in Intel-based Apple
* computers.
*
* Copyright (C) 2007 Nicolas Boichat <[email protected]>
*
* Based on hdaps.c driver:
* Copyright (C) 2005 Robert Love <[email protected]>
* Copyright (C) 2005 Jesper Juhl <[email protected]>
*
* Fan control based on smcFanControl:
* Copyright (C) 2006 Hendrik Holtmann <[email protected]>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License v2 as published by the
* Free Software Foundation.
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/input-polldev.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/timer.h>
#include <linux/dmi.h>
#include <linux/mutex.h>
#include <linux/hwmon-sysfs.h>
#include <linux/io.h>
#include <linux/leds.h>
#include <linux/hwmon.h>
#include <linux/workqueue.h>
/* data port used by Apple SMC */
#define APPLESMC_DATA_PORT 0x300
/* command/status port used by Apple SMC */
#define APPLESMC_CMD_PORT 0x304
#define APPLESMC_NR_PORTS 32 /* 0x300-0x31f */
#define APPLESMC_MAX_DATA_LENGTH 32
#define APPLESMC_MIN_WAIT 0x0040
#define APPLESMC_MAX_WAIT 0x8000
#define APPLESMC_STATUS_MASK 0x0f
#define APPLESMC_READ_CMD 0x10
#define APPLESMC_WRITE_CMD 0x11
#define APPLESMC_GET_KEY_BY_INDEX_CMD 0x12
#define APPLESMC_GET_KEY_TYPE_CMD 0x13
#define KEY_COUNT_KEY "#KEY" /* r-o ui32 */
#define LIGHT_SENSOR_LEFT_KEY "ALV0" /* r-o {alv (6-10 bytes) */
#define LIGHT_SENSOR_RIGHT_KEY "ALV1" /* r-o {alv (6-10 bytes) */
#define BACKLIGHT_KEY "LKSB" /* w-o {lkb (2 bytes) */
#define CLAMSHELL_KEY "MSLD" /* r-o ui8 (unused) */
#define MOTION_SENSOR_X_KEY "MO_X" /* r-o sp78 (2 bytes) */
#define MOTION_SENSOR_Y_KEY "MO_Y" /* r-o sp78 (2 bytes) */
#define MOTION_SENSOR_Z_KEY "MO_Z" /* r-o sp78 (2 bytes) */
#define MOTION_SENSOR_KEY "MOCN" /* r/w ui16 */
#define FANS_COUNT "FNum" /* r-o ui8 */
#define FANS_MANUAL "FS! " /* r-w ui16 */
#define FAN_ACTUAL_SPEED "F0Ac" /* r-o fpe2 (2 bytes) */
#define FAN_MIN_SPEED "F0Mn" /* r-o fpe2 (2 bytes) */
#define FAN_MAX_SPEED "F0Mx" /* r-o fpe2 (2 bytes) */
#define FAN_SAFE_SPEED "F0Sf" /* r-o fpe2 (2 bytes) */
#define FAN_TARGET_SPEED "F0Tg" /* r-w fpe2 (2 bytes) */
#define FAN_POSITION "F0ID" /* r-o char[16] */
/*
* Temperature sensors keys (sp78 - 2 bytes).
*/
static const char *temperature_sensors_sets[][41] = {
/* Set 0: Macbook Pro */
{ "TA0P", "TB0T", "TC0D", "TC0P", "TG0H", "TG0P", "TG0T", "Th0H",
"Th1H", "Tm0P", "Ts0P", "Ts1P", NULL },
/* Set 1: Macbook2 set */
{ "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TN1P", "TTF0", "Th0H",
"Th0S", "Th1H", NULL },
/* Set 2: Macbook set */
{ "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TN1P", "Th0H", "Th0S",
"Th1H", "Ts0P", NULL },
/* Set 3: Macmini set */
{ "TC0D", "TC0P", NULL },
/* Set 4: Mac Pro (2 x Quad-Core) */
{ "TA0P", "TCAG", "TCAH", "TCBG", "TCBH", "TC0C", "TC0D", "TC0P",
"TC1C", "TC1D", "TC2C", "TC2D", "TC3C", "TC3D", "THTG", "TH0P",
"TH1P", "TH2P", "TH3P", "TMAP", "TMAS", "TMBS", "TM0P", "TM0S",
"TM1P", "TM1S", "TM2P", "TM2S", "TM3S", "TM8P", "TM8S", "TM9P",
"TM9S", "TN0H", "TS0C", NULL },
/* Set 5: iMac */
{ "TC0D", "TA0P", "TG0P", "TG0D", "TG0H", "TH0P", "Tm0P", "TO0P",
"Tp0C", NULL },
/* Set 6: Macbook3 set */
{ "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TTF0", "TW0P", "Th0H",
"Th0S", "Th1H", NULL },
/* Set 7: Macbook Air */
{ "TB0T", "TB1S", "TB1T", "TB2S", "TB2T", "TC0D", "TC0P", "TCFP",
"TTF0", "TW0P", "Th0H", "Tp0P", "TpFP", "Ts0P", "Ts0S", NULL },
/* Set 8: Macbook Pro 4,1 (Penryn) */
{ "TB0T", "TC0D", "TC0P", "TG0D", "TG0H", "TTF0", "TW0P", "Th0H",
"Th1H", "Th2H", "Tm0P", "Ts0P", NULL },
/* Set 9: Macbook Pro 3,1 (Santa Rosa) */
{ "TALP", "TB0T", "TC0D", "TC0P", "TG0D", "TG0H", "TTF0", "TW0P",
"Th0H", "Th1H", "Th2H", "Tm0P", "Ts0P", NULL },
/* Set 10: iMac 5,1 */
{ "TA0P", "TC0D", "TC0P", "TG0D", "TH0P", "TO0P", "Tm0P", NULL },
/* Set 11: Macbook 5,1 */
{ "TB0T", "TB1T", "TB2T", "TB3T", "TC0D", "TC0P", "TN0D", "TN0P",
"TTF0", "Th0H", "Th1H", "ThFH", "Ts0P", "Ts0S", NULL },
/* Set 12: Macbook Pro 5,1 */
{ "TB0T", "TB1T", "TB2T", "TB3T", "TC0D", "TC0F", "TC0P", "TG0D",
"TG0F", "TG0H", "TG0P", "TG0T", "TG1H", "TN0D", "TN0P", "TTF0",
"Th2H", "Tm0P", "Ts0P", "Ts0S", NULL },
/* Set 13: iMac 8,1 */
{ "TA0P", "TC0D", "TC0H", "TC0P", "TG0D", "TG0H", "TG0P", "TH0P",
"TL0P", "TO0P", "TW0P", "Tm0P", "Tp0P", NULL },
/* Set 14: iMac 6,1 */
{ "TA0P", "TC0D", "TC0H", "TC0P", "TG0D", "TG0H", "TG0P", "TH0P",
"TO0P", "Tp0P", NULL },
/* Set 15: MacBook Air 2,1 */
{ "TB0T", "TB1S", "TB1T", "TB2S", "TB2T", "TC0D", "TN0D", "TTF0",
"TV0P", "TVFP", "TW0P", "Th0P", "Tp0P", "Tp1P", "TpFP", "Ts0P",
"Ts0S", NULL },
/* Set 16: Mac Pro 3,1 (2 x Quad-Core) */
{ "TA0P", "TCAG", "TCAH", "TCBG", "TCBH", "TC0C", "TC0D", "TC0P",
"TC1C", "TC1D", "TC2C", "TC2D", "TC3C", "TC3D", "TH0P", "TH1P",
"TH2P", "TH3P", "TMAP", "TMAS", "TMBS", "TM0P", "TM0S", "TM1P",
"TM1S", "TM2P", "TM2S", "TM3S", "TM8P", "TM8S", "TM9P", "TM9S",
"TN0C", "TN0D", "TN0H", "TS0C", "Tp0C", "Tp1C", "Tv0S", "Tv1S",
NULL },
/* Set 17: iMac 9,1 */
{ "TA0P", "TC0D", "TC0H", "TC0P", "TG0D", "TG0H", "TH0P", "TL0P",
"TN0D", "TN0H", "TN0P", "TO0P", "Tm0P", "Tp0P", NULL },
/* Set 18: MacBook Pro 2,2 */
{ "TB0T", "TC0D", "TC0P", "TG0H", "TG0P", "TG0T", "TM0P", "TTF0",
"Th0H", "Th1H", "Tm0P", "Ts0P", NULL },
/* Set 19: Macbook Pro 5,3 */
{ "TB0T", "TB1T", "TB2T", "TB3T", "TC0D", "TC0F", "TC0P", "TG0D",
"TG0F", "TG0H", "TG0P", "TG0T", "TN0D", "TN0P", "TTF0", "Th2H",
"Tm0P", "Ts0P", "Ts0S", NULL },
/* Set 20: MacBook Pro 5,4 */
{ "TB0T", "TB1T", "TB2T", "TB3T", "TC0D", "TC0F", "TC0P", "TN0D",
"TN0P", "TTF0", "Th2H", "Ts0P", "Ts0S", NULL },
/* Set 21: MacBook Pro 6,2 */
{ "TB0T", "TB1T", "TB2T", "TC0C", "TC0D", "TC0P", "TC1C", "TG0D",
"TG0P", "TG0T", "TMCD", "TP0P", "TPCD", "Th1H", "Th2H", "Tm0P",
"Ts0P", "Ts0S", NULL },
/* Set 22: MacBook Pro 7,1 */
{ "TB0T", "TB1T", "TB2T", "TC0D", "TC0P", "TN0D", "TN0P", "TN0S",
"TN1D", "TN1F", "TN1G", "TN1S", "Th1H", "Ts0P", "Ts0S", NULL },
};
/* List of keys used to read/write fan speeds */
static const char* fan_speed_keys[] = {
FAN_ACTUAL_SPEED,
FAN_MIN_SPEED,
FAN_MAX_SPEED,
FAN_SAFE_SPEED,
FAN_TARGET_SPEED
};
#define INIT_TIMEOUT_MSECS 5000 /* wait up to 5s for device init ... */
#define INIT_WAIT_MSECS 50 /* ... in 50ms increments */
#define APPLESMC_POLL_INTERVAL 50 /* msecs */
#define APPLESMC_INPUT_FUZZ 4 /* input event threshold */
#define APPLESMC_INPUT_FLAT 4
#define SENSOR_X 0
#define SENSOR_Y 1
#define SENSOR_Z 2
/* Structure to be passed to DMI_MATCH function */
struct dmi_match_data {
/* Indicates whether this computer has an accelerometer. */
int accelerometer;
/* Indicates whether this computer has light sensors and keyboard backlight. */
int light;
/* Indicates which temperature sensors set to use. */
int temperature_set;
};
static const int debug;
static struct platform_device *pdev;
static s16 rest_x;
static s16 rest_y;
static u8 backlight_state[2];
static struct device *hwmon_dev;
static struct input_polled_dev *applesmc_idev;
/* Indicates whether this computer has an accelerometer. */
static unsigned int applesmc_accelerometer;
/* Indicates whether this computer has light sensors and keyboard backlight. */
static unsigned int applesmc_light;
/* The number of fans handled by the driver */
static unsigned int fans_handled;
/* Indicates which temperature sensors set to use. */
static unsigned int applesmc_temperature_set;
static DEFINE_MUTEX(applesmc_lock);
/*
* Last index written to key_at_index sysfs file, and value to use for all other
* key_at_index_* sysfs files.
*/
static unsigned int key_at_index;
static struct workqueue_struct *applesmc_led_wq;
/*
* __wait_status - Wait up to 32ms for the status port to get a certain value
* (masked with 0x0f), returning zero if the value is obtained. Callers must
* hold applesmc_lock.
*/
static int __wait_status(u8 val)
{
int us;
val = val & APPLESMC_STATUS_MASK;
for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
udelay(us);
if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val) {
if (debug)
printk(KERN_DEBUG
"Waited %d us for status %x\n",
2 * us - APPLESMC_MIN_WAIT, val);
return 0;
}
}
printk(KERN_WARNING "applesmc: wait status failed: %x != %x\n",
val, inb(APPLESMC_CMD_PORT));
return -EIO;
}
/*
* special treatment of command port - on newer macbooks, it seems necessary
* to resend the command byte before polling the status again. Callers must
* hold applesmc_lock.
*/
static int send_command(u8 cmd)
{
int us;
for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
outb(cmd, APPLESMC_CMD_PORT);
udelay(us);
if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == 0x0c)
return 0;
}
printk(KERN_WARNING "applesmc: command failed: %x -> %x\n",
cmd, inb(APPLESMC_CMD_PORT));
return -EIO;
}
/*
* applesmc_read_key - reads len bytes from a given key, and put them in buffer.
* Returns zero on success or a negative error on failure. Callers must
* hold applesmc_lock.
*/
static int applesmc_read_key(const char* key, u8* buffer, u8 len)
{
int i;
if (len > APPLESMC_MAX_DATA_LENGTH) {
printk(KERN_ERR "applesmc_read_key: cannot read more than "
"%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
return -EINVAL;
}
if (send_command(APPLESMC_READ_CMD))
return -EIO;
for (i = 0; i < 4; i++) {
outb(key[i], APPLESMC_DATA_PORT);
if (__wait_status(0x04))
return -EIO;
}
if (debug)
printk(KERN_DEBUG "<%s", key);
outb(len, APPLESMC_DATA_PORT);
if (debug)
printk(KERN_DEBUG ">%x", len);
for (i = 0; i < len; i++) {
if (__wait_status(0x05))
return -EIO;
buffer[i] = inb(APPLESMC_DATA_PORT);
if (debug)
printk(KERN_DEBUG "<%x", buffer[i]);
}
if (debug)
printk(KERN_DEBUG "\n");
return 0;
}
/*
* applesmc_write_key - writes len bytes from buffer to a given key.
* Returns zero on success or a negative error on failure. Callers must
* hold applesmc_lock.
*/
static int applesmc_write_key(const char* key, u8* buffer, u8 len)
{
int i;
if (len > APPLESMC_MAX_DATA_LENGTH) {
printk(KERN_ERR "applesmc_write_key: cannot write more than "
"%d bytes\n", APPLESMC_MAX_DATA_LENGTH);
return -EINVAL;
}
if (send_command(APPLESMC_WRITE_CMD))
return -EIO;
for (i = 0; i < 4; i++) {
outb(key[i], APPLESMC_DATA_PORT);
if (__wait_status(0x04))
return -EIO;
}
outb(len, APPLESMC_DATA_PORT);
for (i = 0; i < len; i++) {
if (__wait_status(0x04))
return -EIO;
outb(buffer[i], APPLESMC_DATA_PORT);
}
return 0;
}
/*
* applesmc_get_key_at_index - get key at index, and put the result in key
* (char[6]). Returns zero on success or a negative error on failure. Callers
* must hold applesmc_lock.
*/
static int applesmc_get_key_at_index(int index, char* key)
{
int i;
u8 readkey[4];
readkey[0] = index >> 24;
readkey[1] = index >> 16;
readkey[2] = index >> 8;
readkey[3] = index;
if (send_command(APPLESMC_GET_KEY_BY_INDEX_CMD))
return -EIO;
for (i = 0; i < 4; i++) {
outb(readkey[i], APPLESMC_DATA_PORT);
if (__wait_status(0x04))
return -EIO;
}
outb(4, APPLESMC_DATA_PORT);
for (i = 0; i < 4; i++) {
if (__wait_status(0x05))
return -EIO;
key[i] = inb(APPLESMC_DATA_PORT);
}
key[4] = 0;
return 0;
}
/*
* applesmc_get_key_type - get key type, and put the result in type (char[6]).
* Returns zero on success or a negative error on failure. Callers must
* hold applesmc_lock.
*/
static int applesmc_get_key_type(char* key, char* type)
{
int i;
if (send_command(APPLESMC_GET_KEY_TYPE_CMD))
return -EIO;
for (i = 0; i < 4; i++) {
outb(key[i], APPLESMC_DATA_PORT);
if (__wait_status(0x04))
return -EIO;
}
outb(6, APPLESMC_DATA_PORT);
for (i = 0; i < 6; i++) {
if (__wait_status(0x05))
return -EIO;
type[i] = inb(APPLESMC_DATA_PORT);
}
type[5] = 0;
return 0;
}
/*
* applesmc_read_motion_sensor - Read motion sensor (X, Y or Z). Callers must
* hold applesmc_lock.
*/
static int applesmc_read_motion_sensor(int index, s16* value)
{
u8 buffer[2];
int ret;
switch (index) {
case SENSOR_X:
ret = applesmc_read_key(MOTION_SENSOR_X_KEY, buffer, 2);
break;
case SENSOR_Y:
ret = applesmc_read_key(MOTION_SENSOR_Y_KEY, buffer, 2);
break;
case SENSOR_Z:
ret = applesmc_read_key(MOTION_SENSOR_Z_KEY, buffer, 2);
break;
default:
ret = -EINVAL;
}
*value = ((s16)buffer[0] << 8) | buffer[1];
return ret;
}
/*
* applesmc_device_init - initialize the accelerometer. Returns zero on success
* and negative error code on failure. Can sleep.
*/
static int applesmc_device_init(void)
{
int total, ret = -ENXIO;
u8 buffer[2];
if (!applesmc_accelerometer)
return 0;
mutex_lock(&applesmc_lock);
for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
if (debug)
printk(KERN_DEBUG "applesmc try %d\n", total);
if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) &&
(buffer[0] != 0x00 || buffer[1] != 0x00)) {
if (total == INIT_TIMEOUT_MSECS) {
printk(KERN_DEBUG "applesmc: device has"
" already been initialized"
" (0x%02x, 0x%02x).\n",
buffer[0], buffer[1]);
} else {
printk(KERN_DEBUG "applesmc: device"
" successfully initialized"
" (0x%02x, 0x%02x).\n",
buffer[0], buffer[1]);
}
ret = 0;
goto out;
}
buffer[0] = 0xe0;
buffer[1] = 0x00;
applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2);
msleep(INIT_WAIT_MSECS);
}
printk(KERN_WARNING "applesmc: failed to init the device\n");
out:
mutex_unlock(&applesmc_lock);
return ret;
}
/*
* applesmc_get_fan_count - get the number of fans. Callers must NOT hold
* applesmc_lock.
*/
static int applesmc_get_fan_count(void)
{
int ret;
u8 buffer[1];
mutex_lock(&applesmc_lock);
ret = applesmc_read_key(FANS_COUNT, buffer, 1);
mutex_unlock(&applesmc_lock);
if (ret)
return ret;
else
return buffer[0];
}
/* Device model stuff */
static int applesmc_probe(struct platform_device *dev)
{
int ret;
ret = applesmc_device_init();
if (ret)
return ret;
printk(KERN_INFO "applesmc: device successfully initialized.\n");
return 0;
}
/* Synchronize device with memorized backlight state */
static int applesmc_pm_resume(struct device *dev)
{
mutex_lock(&applesmc_lock);
if (applesmc_light)
applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
mutex_unlock(&applesmc_lock);
return 0;
}
/* Reinitialize device on resume from hibernation */
static int applesmc_pm_restore(struct device *dev)
{
int ret = applesmc_device_init();
if (ret)
return ret;
return applesmc_pm_resume(dev);
}
static const struct dev_pm_ops applesmc_pm_ops = {
.resume = applesmc_pm_resume,
.restore = applesmc_pm_restore,
};
static struct platform_driver applesmc_driver = {
.probe = applesmc_probe,
.driver = {
.name = "applesmc",
.owner = THIS_MODULE,
.pm = &applesmc_pm_ops,
},
};
/*
* applesmc_calibrate - Set our "resting" values. Callers must
* hold applesmc_lock.
*/
static void applesmc_calibrate(void)
{
applesmc_read_motion_sensor(SENSOR_X, &rest_x);
applesmc_read_motion_sensor(SENSOR_Y, &rest_y);
rest_x = -rest_x;
}
static void applesmc_idev_poll(struct input_polled_dev *dev)
{
struct input_dev *idev = dev->input;
s16 x, y;
mutex_lock(&applesmc_lock);
if (applesmc_read_motion_sensor(SENSOR_X, &x))
goto out;
if (applesmc_read_motion_sensor(SENSOR_Y, &y))
goto out;
x = -x;
input_report_abs(idev, ABS_X, x - rest_x);
input_report_abs(idev, ABS_Y, y - rest_y);
input_sync(idev);
out:
mutex_unlock(&applesmc_lock);
}
/* Sysfs Files */
static ssize_t applesmc_name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "applesmc\n");
}
static ssize_t applesmc_position_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int ret;
s16 x, y, z;
mutex_lock(&applesmc_lock);
ret = applesmc_read_motion_sensor(SENSOR_X, &x);
if (ret)
goto out;
ret = applesmc_read_motion_sensor(SENSOR_Y, &y);
if (ret)
goto out;
ret = applesmc_read_motion_sensor(SENSOR_Z, &z);
if (ret)
goto out;
out:
mutex_unlock(&applesmc_lock);
if (ret)
return ret;
else
return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z);
}
static ssize_t applesmc_light_show(struct device *dev,
struct device_attribute *attr, char *sysfsbuf)
{
static int data_length;
int ret;
u8 left = 0, right = 0;
u8 buffer[10], query[6];
mutex_lock(&applesmc_lock);
if (!data_length) {
ret = applesmc_get_key_type(LIGHT_SENSOR_LEFT_KEY, query);
if (ret)
goto out;
data_length = clamp_val(query[0], 0, 10);
printk(KERN_INFO "applesmc: light sensor data length set to "
"%d\n", data_length);
}
ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length);
/* newer macbooks report a single 10-bit bigendian value */
if (data_length == 10) {
left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2;
goto out;
}
left = buffer[2];
if (ret)
goto out;
ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length);
right = buffer[2];
out:
mutex_unlock(&applesmc_lock);
if (ret)
return ret;
else
return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
}
/* Displays sensor key as label */
static ssize_t applesmc_show_sensor_label(struct device *dev,
struct device_attribute *devattr, char *sysfsbuf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
const char *key =
temperature_sensors_sets[applesmc_temperature_set][attr->index];
return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
}
/* Displays degree Celsius * 1000 */
static ssize_t applesmc_show_temperature(struct device *dev,
struct device_attribute *devattr, char *sysfsbuf)
{
int ret;
u8 buffer[2];
unsigned int temp;
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
const char* key =
temperature_sensors_sets[applesmc_temperature_set][attr->index];
mutex_lock(&applesmc_lock);
ret = applesmc_read_key(key, buffer, 2);
temp = buffer[0]*1000;
temp += (buffer[1] >> 6) * 250;
mutex_unlock(&applesmc_lock);
if (ret)
return ret;
else
return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", temp);
}
static ssize_t applesmc_show_fan_speed(struct device *dev,
struct device_attribute *attr, char *sysfsbuf)
{
int ret;
unsigned int speed = 0;
char newkey[5];
u8 buffer[2];
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
newkey[0] = fan_speed_keys[sensor_attr->nr][0];
newkey[1] = '0' + sensor_attr->index;
newkey[2] = fan_speed_keys[sensor_attr->nr][2];
newkey[3] = fan_speed_keys[sensor_attr->nr][3];
newkey[4] = 0;
mutex_lock(&applesmc_lock);
ret = applesmc_read_key(newkey, buffer, 2);
speed = ((buffer[0] << 8 | buffer[1]) >> 2);
mutex_unlock(&applesmc_lock);
if (ret)
return ret;
else
return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
}
static ssize_t applesmc_store_fan_speed(struct device *dev,
struct device_attribute *attr,
const char *sysfsbuf, size_t count)
{
int ret;
u32 speed;
char newkey[5];
u8 buffer[2];
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
speed = simple_strtoul(sysfsbuf, NULL, 10);
if (speed > 0x4000) /* Bigger than a 14-bit value */
return -EINVAL;
newkey[0] = fan_speed_keys[sensor_attr->nr][0];
newkey[1] = '0' + sensor_attr->index;
newkey[2] = fan_speed_keys[sensor_attr->nr][2];
newkey[3] = fan_speed_keys[sensor_attr->nr][3];
newkey[4] = 0;
mutex_lock(&applesmc_lock);
buffer[0] = (speed >> 6) & 0xff;
buffer[1] = (speed << 2) & 0xff;
ret = applesmc_write_key(newkey, buffer, 2);
mutex_unlock(&applesmc_lock);
if (ret)
return ret;
else
return count;
}
static ssize_t applesmc_show_fan_manual(struct device *dev,
struct device_attribute *devattr, char *sysfsbuf)
{
int ret;
u16 manual = 0;
u8 buffer[2];
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
mutex_lock(&applesmc_lock);
ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
manual = ((buffer[0] << 8 | buffer[1]) >> attr->index) & 0x01;
mutex_unlock(&applesmc_lock);
if (ret)
return ret;
else
return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
}
static ssize_t applesmc_store_fan_manual(struct device *dev,
struct device_attribute *devattr,
const char *sysfsbuf, size_t count)
{
int ret;
u8 buffer[2];
u32 input;
u16 val;
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
input = simple_strtoul(sysfsbuf, NULL, 10);
mutex_lock(&applesmc_lock);
ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
val = (buffer[0] << 8 | buffer[1]);
if (ret)
goto out;
if (input)
val = val | (0x01 << attr->index);
else
val = val & ~(0x01 << attr->index);
buffer[0] = (val >> 8) & 0xFF;
buffer[1] = val & 0xFF;
ret = applesmc_write_key(FANS_MANUAL, buffer, 2);
out:
mutex_unlock(&applesmc_lock);
if (ret)
return ret;
else
return count;
}
static ssize_t applesmc_show_fan_position(struct device *dev,
struct device_attribute *attr, char *sysfsbuf)
{
int ret;
char newkey[5];
u8 buffer[17];
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
newkey[0] = FAN_POSITION[0];
newkey[1] = '0' + sensor_attr->index;
newkey[2] = FAN_POSITION[2];
newkey[3] = FAN_POSITION[3];
newkey[4] = 0;
mutex_lock(&applesmc_lock);
ret = applesmc_read_key(newkey, buffer, 16);
buffer[16] = 0;
mutex_unlock(&applesmc_lock);
if (ret)
return ret;
else
return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4);
}
static ssize_t applesmc_calibrate_show(struct device *dev,
struct device_attribute *attr, char *sysfsbuf)
{
return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y);
}
static ssize_t applesmc_calibrate_store(struct device *dev,
struct device_attribute *attr, const char *sysfsbuf, size_t count)
{
mutex_lock(&applesmc_lock);
applesmc_calibrate();
mutex_unlock(&applesmc_lock);
return count;
}
static void applesmc_backlight_set(struct work_struct *work)
{
mutex_lock(&applesmc_lock);
applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2);
mutex_unlock(&applesmc_lock);
}
static DECLARE_WORK(backlight_work, &applesmc_backlight_set);
static void applesmc_brightness_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
int ret;
backlight_state[0] = value;
ret = queue_work(applesmc_led_wq, &backlight_work);
if (debug && (!ret))
printk(KERN_DEBUG "applesmc: work was already on the queue.\n");
}
static ssize_t applesmc_key_count_show(struct device *dev,
struct device_attribute *attr, char *sysfsbuf)
{
int ret;
u8 buffer[4];
u32 count;
mutex_lock(&applesmc_lock);
ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
((u32)buffer[2]<<8) + buffer[3];
mutex_unlock(&applesmc_lock);
if (ret)
return ret;
else
return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
}
static ssize_t applesmc_key_at_index_read_show(struct device *dev,
struct device_attribute *attr, char *sysfsbuf)
{
char key[5];
char info[6];
int ret;
mutex_lock(&applesmc_lock);
ret = applesmc_get_key_at_index(key_at_index, key);
if (ret || !key[0]) {
mutex_unlock(&applesmc_lock);
return -EINVAL;
}
ret = applesmc_get_key_type(key, info);
if (ret) {
mutex_unlock(&applesmc_lock);
return ret;
}
/*
* info[0] maximum value (APPLESMC_MAX_DATA_LENGTH) is much lower than
* PAGE_SIZE, so we don't need any checks before writing to sysfsbuf.
*/
ret = applesmc_read_key(key, sysfsbuf, info[0]);
mutex_unlock(&applesmc_lock);
if (!ret) {
return info[0];
} else {
return ret;
}
}
static ssize_t applesmc_key_at_index_data_length_show(struct device *dev,
struct device_attribute *attr, char *sysfsbuf)
{
char key[5];
char info[6];
int ret;
mutex_lock(&applesmc_lock);
ret = applesmc_get_key_at_index(key_at_index, key);
if (ret || !key[0]) {
mutex_unlock(&applesmc_lock);
return -EINVAL;
}
ret = applesmc_get_key_type(key, info);
mutex_unlock(&applesmc_lock);
if (!ret)
return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", info[0]);
else
return ret;
}
static ssize_t applesmc_key_at_index_type_show(struct device *dev,
struct device_attribute *attr, char *sysfsbuf)
{
char key[5];
char info[6];
int ret;
mutex_lock(&applesmc_lock);
ret = applesmc_get_key_at_index(key_at_index, key);
if (ret || !key[0]) {
mutex_unlock(&applesmc_lock);
return -EINVAL;
}
ret = applesmc_get_key_type(key, info);
mutex_unlock(&applesmc_lock);
if (!ret)
return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", info+1);
else
return ret;
}
static ssize_t applesmc_key_at_index_name_show(struct device *dev,
struct device_attribute *attr, char *sysfsbuf)
{
char key[5];
int ret;