--- /dev/null
+/*
+ * 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 <nicolas@boichat.ch>
+ *
+ * Based on hdaps.c driver:
+ * Copyright (C) 2005 Robert Love <rml@novell.com>
+ * Copyright (C) 2005 Jesper Juhl <jesper.juhl@gmail.com>
+ *
+ * Fan control based on smcFanControl:
+ * Copyright (C) 2006 Hendrik Holtmann <holtmann@mac.com>
+ *
+ * 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.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 <asm/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_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 bytes) */
+#define LIGHT_SENSOR_RIGHT_KEY "ALV1" /* r-o {alv (6 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).
+ * First set for Macbook(Pro), second for Macmini.
+ */
+static const char* temperature_sensors_sets[][13] = {
+ { "TA0P", "TB0T", "TC0D", "TC0P", "TG0H", "TG0P", "TG0T", "Th0H",
+ "Th1H", "Tm0P", "Ts0P", "Ts1P", NULL },
+ { "TC0D", "TC0P", 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_PERIOD (HZ/20) /* poll for input every 1/20s */
+#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 struct timer_list applesmc_timer;
+static struct input_dev *applesmc_idev;
+static struct class_device *hwmon_class_dev;
+
+/* 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;
+
+/* Indicates which temperature sensors set to use. */
+static unsigned int applesmc_temperature_set;
+
+static struct 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 2ms 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)
+{
+ unsigned int i;
+
+ val = val & APPLESMC_STATUS_MASK;
+
+ for (i = 0; i < 200; i++) {
+ if ((inb(APPLESMC_CMD_PORT) & APPLESMC_STATUS_MASK) == val) {
+ if (debug)
+ printk(KERN_DEBUG
+ "Waited %d us for status %x\n",
+ i*10, val);
+ return 0;
+ }
+ udelay(10);
+ }
+
+ printk(KERN_WARNING "applesmc: wait status failed: %x != %x\n",
+ val, 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;
+ }
+
+ outb(APPLESMC_READ_CMD, APPLESMC_CMD_PORT);
+ if (__wait_status(0x0c))
+ 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;
+ }
+
+ outb(APPLESMC_WRITE_CMD, APPLESMC_CMD_PORT);
+ if (__wait_status(0x0c))
+ 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;
+
+ outb(APPLESMC_GET_KEY_BY_INDEX_CMD, APPLESMC_CMD_PORT);
+ if (__wait_status(0x0c))
+ 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;
+
+ outb(APPLESMC_GET_KEY_TYPE_CMD, APPLESMC_CMD_PORT);
+ if (__wait_status(0x0c))
+ return -EIO;
+
+ for (i = 0; i < 4; i++) {
+ outb(key[i], APPLESMC_DATA_PORT);
+ if (__wait_status(0x04))
+ return -EIO;
+ }
+
+ outb(5, 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;
+}
+
+static int applesmc_resume(struct platform_device *dev)
+{
+ return applesmc_device_init();
+}
+
+static struct platform_driver applesmc_driver = {
+ .probe = applesmc_probe,
+ .resume = applesmc_resume,
+ .driver = {
+ .name = "applesmc",
+ .owner = THIS_MODULE,
+ },
+};
+
+/*
+ * 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 int applesmc_idev_open(struct input_dev *dev)
+{
+ add_timer(&applesmc_timer);
+
+ return 0;
+}
+
+static void applesmc_idev_close(struct input_dev *dev)
+{
+ del_timer_sync(&applesmc_timer);
+}
+
+static void applesmc_idev_poll(unsigned long unused)
+{
+ s16 x, y;
+
+ /* Cannot sleep. Try nonblockingly. If we fail, try again later. */
+ if (!mutex_trylock(&applesmc_lock)) {
+ mod_timer(&applesmc_timer, jiffies + APPLESMC_POLL_PERIOD);
+ return;
+ }
+
+ 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(applesmc_idev, ABS_X, x - rest_x);
+ input_report_abs(applesmc_idev, ABS_Y, y - rest_y);
+ input_sync(applesmc_idev);
+
+out:
+ mod_timer(&applesmc_timer, jiffies + APPLESMC_POLL_PERIOD);
+
+ mutex_unlock(&applesmc_lock);
+}
+
+/* Sysfs Files */
+
+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)
+{
+ int ret;
+ u8 left = 0, right = 0;
+ u8 buffer[6];
+
+ mutex_lock(&applesmc_lock);
+
+ ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, 6);
+ left = buffer[2];
+ if (ret)
+ goto out;
+ ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, 6);
+ right = buffer[2];
+
+out:
+ mutex_unlock(&applesmc_lock);
+ if (ret)
+ return ret;
+ else
+ return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right);
+}
+
+/* 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;
+}
+
+/* Store the next backlight value to be written by the work */
+static unsigned int backlight_value;
+
+static void applesmc_backlight_set(struct work_struct *work)
+{
+ u8 buffer[2];
+
+ mutex_lock(&applesmc_lock);
+ buffer[0] = backlight_value;
+ buffer[1] = 0x00;
+ applesmc_write_key(BACKLIGHT_KEY, buffer, 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_value = 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;
+
+ mutex_lock(&applesmc_lock);
+
+ ret = applesmc_get_key_at_index(key_at_index, key);
+
+ mutex_unlock(&applesmc_lock);
+
+ if (!ret && key[0])
+ return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key);
+ else
+ return -EINVAL;
+}
+
+static ssize_t applesmc_key_at_index_show(struct device *dev,
+ struct device_attribute *attr, char *sysfsbuf)
+{
+ return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index);
+}
+
+static ssize_t applesmc_key_at_index_store(struct device *dev,
+ struct device_attribute *attr, const char *sysfsbuf, size_t count)
+{
+ mutex_lock(&applesmc_lock);
+
+ key_at_index = simple_strtoul(sysfsbuf, NULL, 10);
+
+ mutex_unlock(&applesmc_lock);
+
+ return count;
+}
+
+static struct led_classdev applesmc_backlight = {
+ .name = "smc:kbd_backlight",
+ .default_trigger = "nand-disk",
+ .brightness_set = applesmc_brightness_set,
+};
+
+static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL);
+static DEVICE_ATTR(calibrate, 0644,
+ applesmc_calibrate_show, applesmc_calibrate_store);
+
+static struct attribute *accelerometer_attributes[] = {
+ &dev_attr_position.attr,
+ &dev_attr_calibrate.attr,
+ NULL
+};
+
+static const struct attribute_group accelerometer_attributes_group =
+ { .attrs = accelerometer_attributes };
+
+static DEVICE_ATTR(light, 0444, applesmc_light_show, NULL);
+
+static DEVICE_ATTR(key_count, 0444, applesmc_key_count_show, NULL);
+static DEVICE_ATTR(key_at_index, 0644,
+ applesmc_key_at_index_show, applesmc_key_at_index_store);
+static DEVICE_ATTR(key_at_index_name, 0444,
+ applesmc_key_at_index_name_show, NULL);
+static DEVICE_ATTR(key_at_index_type, 0444,
+ applesmc_key_at_index_type_show, NULL);
+static DEVICE_ATTR(key_at_index_data_length, 0444,
+ applesmc_key_at_index_data_length_show, NULL);
+static DEVICE_ATTR(key_at_index_data, 0444,
+ applesmc_key_at_index_read_show, NULL);
+
+static struct attribute *key_enumeration_attributes[] = {
+ &dev_attr_key_count.attr,
+ &dev_attr_key_at_index.attr,
+ &dev_attr_key_at_index_name.attr,
+ &dev_attr_key_at_index_type.attr,
+ &dev_attr_key_at_index_data_length.attr,
+ &dev_attr_key_at_index_data.attr,
+ NULL
+};
+
+static const struct attribute_group key_enumeration_group =
+ { .attrs = key_enumeration_attributes };
+
+/*
+ * Macro defining SENSOR_DEVICE_ATTR for a fan sysfs entries.
+ * - show actual speed
+ * - show/store minimum speed
+ * - show maximum speed
+ * - show safe speed
+ * - show/store target speed
+ * - show/store manual mode
+ */
+#define sysfs_fan_speeds_offset(offset) \
+static SENSOR_DEVICE_ATTR_2(fan##offset##_input, S_IRUGO, \
+ applesmc_show_fan_speed, NULL, 0, offset-1); \
+\
+static SENSOR_DEVICE_ATTR_2(fan##offset##_min, S_IRUGO | S_IWUSR, \
+ applesmc_show_fan_speed, applesmc_store_fan_speed, 1, offset-1); \
+\
+static SENSOR_DEVICE_ATTR_2(fan##offset##_max, S_IRUGO, \
+ applesmc_show_fan_speed, NULL, 2, offset-1); \
+\
+static SENSOR_DEVICE_ATTR_2(fan##offset##_safe, S_IRUGO, \
+ applesmc_show_fan_speed, NULL, 3, offset-1); \
+\
+static SENSOR_DEVICE_ATTR_2(fan##offset##_output, S_IRUGO | S_IWUSR, \
+ applesmc_show_fan_speed, applesmc_store_fan_speed, 4, offset-1); \
+\
+static SENSOR_DEVICE_ATTR(fan##offset##_manual, S_IRUGO | S_IWUSR, \
+ applesmc_show_fan_manual, applesmc_store_fan_manual, offset-1); \
+\
+static SENSOR_DEVICE_ATTR(fan##offset##_position, S_IRUGO, \
+ applesmc_show_fan_position, NULL, offset-1); \
+\
+static struct attribute *fan##offset##_attributes[] = { \
+ &sensor_dev_attr_fan##offset##_input.dev_attr.attr, \
+ &sensor_dev_attr_fan##offset##_min.dev_attr.attr, \
+ &sensor_dev_attr_fan##offset##_max.dev_attr.attr, \
+ &sensor_dev_attr_fan##offset##_safe.dev_attr.attr, \
+ &sensor_dev_attr_fan##offset##_output.dev_attr.attr, \
+ &sensor_dev_attr_fan##offset##_manual.dev_attr.attr, \
+ &sensor_dev_attr_fan##offset##_position.dev_attr.attr, \
+ NULL \
+};
+
+/*
+ * Create the needed functions for each fan using the macro defined above
+ * (2 fans are supported)
+ */
+sysfs_fan_speeds_offset(1);
+sysfs_fan_speeds_offset(2);
+
+static const struct attribute_group fan_attribute_groups[] = {
+ { .attrs = fan1_attributes },
+ { .attrs = fan2_attributes }
+};
+
+/*
+ * Temperature sensors sysfs entries.
+ */
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
+ applesmc_show_temperature, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
+ applesmc_show_temperature, NULL, 1);
+static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO,
+ applesmc_show_temperature, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO,
+ applesmc_show_temperature, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO,
+ applesmc_show_temperature, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO,
+ applesmc_show_temperature, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO,
+ applesmc_show_temperature, NULL, 6);
+static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO,
+ applesmc_show_temperature, NULL, 7);
+static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO,
+ applesmc_show_temperature, NULL, 8);
+static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO,
+ applesmc_show_temperature, NULL, 9);
+static SENSOR_DEVICE_ATTR(temp11_input, S_IRUGO,
+ applesmc_show_temperature, NULL, 10);
+static SENSOR_DEVICE_ATTR(temp12_input, S_IRUGO,
+ applesmc_show_temperature, NULL, 11);
+
+static struct attribute *temperature_attributes[] = {
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
+ &sensor_dev_attr_temp3_input.dev_attr.attr,
+ &sensor_dev_attr_temp4_input.dev_attr.attr,
+ &sensor_dev_attr_temp5_input.dev_attr.attr,
+ &sensor_dev_attr_temp6_input.dev_attr.attr,
+ &sensor_dev_attr_temp7_input.dev_attr.attr,
+ &sensor_dev_attr_temp8_input.dev_attr.attr,
+ &sensor_dev_attr_temp9_input.dev_attr.attr,
+ &sensor_dev_attr_temp10_input.dev_attr.attr,
+ &sensor_dev_attr_temp11_input.dev_attr.attr,
+ &sensor_dev_attr_temp12_input.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group temperature_attributes_group =
+ { .attrs = temperature_attributes };
+
+/* Module stuff */
+
+/*
+ * applesmc_dmi_match - found a match. return one, short-circuiting the hunt.
+ */
+static int applesmc_dmi_match(struct dmi_system_id *id)
+{
+ int i = 0;
+ struct dmi_match_data* dmi_data = id->driver_data;
+ printk(KERN_INFO "applesmc: %s detected:\n", id->ident);
+ applesmc_accelerometer = dmi_data->accelerometer;
+ printk(KERN_INFO "applesmc: - Model %s accelerometer\n",
+ applesmc_accelerometer ? "with" : "without");
+ applesmc_light = dmi_data->light;
+ printk(KERN_INFO "applesmc: - Model %s light sensors and backlight\n",
+ applesmc_light ? "with" : "without");
+
+ applesmc_temperature_set = dmi_data->temperature_set;
+ while (temperature_sensors_sets[applesmc_temperature_set][i] != NULL)
+ i++;
+ printk(KERN_INFO "applesmc: - Model with %d temperature sensors\n", i);
+ return 1;
+}
+
+/* Create accelerometer ressources */
+static int applesmc_create_accelerometer(void)
+{
+ int ret;
+
+ ret = sysfs_create_group(&pdev->dev.kobj,
+ &accelerometer_attributes_group);
+ if (ret)
+ goto out;
+
+ applesmc_idev = input_allocate_device();
+ if (!applesmc_idev) {
+ ret = -ENOMEM;
+ goto out_sysfs;
+ }
+
+ /* initial calibrate for the input device */
+ applesmc_calibrate();
+
+ /* initialize the input class */
+ applesmc_idev->name = "applesmc";
+ applesmc_idev->id.bustype = BUS_HOST;
+ applesmc_idev->cdev.dev = &pdev->dev;
+ applesmc_idev->evbit[0] = BIT(EV_ABS);
+ applesmc_idev->open = applesmc_idev_open;
+ applesmc_idev->close = applesmc_idev_close;
+ input_set_abs_params(applesmc_idev, ABS_X,
+ -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
+ input_set_abs_params(applesmc_idev, ABS_Y,
+ -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT);
+
+ ret = input_register_device(applesmc_idev);
+ if (ret)
+ goto out_idev;
+
+ /* start up our timer for the input device */
+ init_timer(&applesmc_timer);
+ applesmc_timer.function = applesmc_idev_poll;
+ applesmc_timer.expires = jiffies + APPLESMC_POLL_PERIOD;
+
+ return 0;
+
+out_idev:
+ input_free_device(applesmc_idev);
+
+out_sysfs:
+ sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
+
+out:
+ printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
+ return ret;
+}
+
+/* Release all ressources used by the accelerometer */
+static void applesmc_release_accelerometer(void)
+{
+ del_timer_sync(&applesmc_timer);
+ input_unregister_device(applesmc_idev);
+ sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group);
+}
+
+static __initdata struct dmi_match_data applesmc_dmi_data[] = {
+/* MacBook Pro: accelerometer, backlight and temperature set 0 */
+ { .accelerometer = 1, .light = 1, .temperature_set = 0 },
+/* MacBook: accelerometer and temperature set 0 */
+ { .accelerometer = 1, .light = 0, .temperature_set = 0 },
+/* MacBook: temperature set 1 */
+ { .accelerometer = 0, .light = 0, .temperature_set = 1 }
+};
+
+/* Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1".
+ * So we need to put "Apple MacBook Pro" before "Apple MacBook". */
+static __initdata struct dmi_system_id applesmc_whitelist[] = {
+ { applesmc_dmi_match, "Apple MacBook Pro", {
+ DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
+ DMI_MATCH(DMI_PRODUCT_NAME,"MacBookPro") },
+ (void*)&applesmc_dmi_data[0]},
+ { applesmc_dmi_match, "Apple MacBook", {
+ DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
+ DMI_MATCH(DMI_PRODUCT_NAME,"MacBook") },
+ (void*)&applesmc_dmi_data[1]},
+ { applesmc_dmi_match, "Apple Macmini", {
+ DMI_MATCH(DMI_BOARD_VENDOR,"Apple"),
+ DMI_MATCH(DMI_PRODUCT_NAME,"Macmini") },
+ (void*)&applesmc_dmi_data[2]},
+ { .ident = NULL }
+};
+
+static int __init applesmc_init(void)
+{
+ int ret;
+ int count;
+ int i;
+
+ mutex_init(&applesmc_lock);
+
+ if (!dmi_check_system(applesmc_whitelist)) {
+ printk(KERN_WARNING "applesmc: supported laptop not found!\n");
+ ret = -ENODEV;
+ goto out;
+ }
+
+ if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS,
+ "applesmc")) {
+ ret = -ENXIO;
+ goto out;
+ }
+
+ ret = platform_driver_register(&applesmc_driver);
+ if (ret)
+ goto out_region;
+
+ pdev = platform_device_register_simple("applesmc", -1, NULL, 0);
+ if (IS_ERR(pdev)) {
+ ret = PTR_ERR(pdev);
+ goto out_driver;
+ }
+
+ /* Create key enumeration sysfs files */
+ ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group);
+ if (ret)
+ goto out_device;
+
+ /* create fan files */
+ count = applesmc_get_fan_count();
+ if (count < 0) {
+ printk(KERN_ERR "applesmc: Cannot get the number of fans.\n");
+ } else {
+ printk(KERN_INFO "applesmc: %d fans found.\n", count);
+
+ switch (count) {
+ default:
+ printk(KERN_WARNING "applesmc: More than 2 fans found,"
+ " but at most 2 fans are supported"
+ " by the driver.\n");
+ case 2:
+ ret = sysfs_create_group(&pdev->dev.kobj,
+ &fan_attribute_groups[1]);
+ if (ret)
+ goto out_key_enumeration;
+ case 1:
+ ret = sysfs_create_group(&pdev->dev.kobj,
+ &fan_attribute_groups[0]);
+ if (ret)
+ goto out_fan_1;
+ case 0:
+ ;
+ }
+ }
+
+ for (i = 0;
+ temperature_sensors_sets[applesmc_temperature_set][i] != NULL;
+ i++) {
+ if (temperature_attributes[i] == NULL) {
+ printk(KERN_ERR "applesmc: More temperature sensors "
+ "in temperature_sensors_sets (at least %i)"
+ "than available sysfs files in "
+ "temperature_attributes (%i), please report "
+ "this bug.\n", i, i-1);
+ goto out_temperature;
+ }
+ ret = sysfs_create_file(&pdev->dev.kobj,
+ temperature_attributes[i]);
+ if (ret)
+ goto out_temperature;
+ }
+
+ if (applesmc_accelerometer) {
+ ret = applesmc_create_accelerometer();
+ if (ret)
+ goto out_temperature;
+ }
+
+ if (applesmc_light) {
+ /* Add light sensor file */
+ ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_light.attr);
+ if (ret)
+ goto out_accelerometer;
+
+ /* Create the workqueue */
+ applesmc_led_wq = create_singlethread_workqueue("applesmc-led");
+ if (!applesmc_led_wq) {
+ ret = -ENOMEM;
+ goto out_light_sysfs;
+ }
+
+ /* register as a led device */
+ ret = led_classdev_register(&pdev->dev, &applesmc_backlight);
+ if (ret < 0)
+ goto out_light_wq;
+ }
+
+ hwmon_class_dev = hwmon_device_register(&pdev->dev);
+ if (IS_ERR(hwmon_class_dev)) {
+ ret = PTR_ERR(hwmon_class_dev);
+ goto out_light_ledclass;
+ }
+
+ printk(KERN_INFO "applesmc: driver successfully loaded.\n");
+
+ return 0;
+
+out_light_ledclass:
+ if (applesmc_light)
+ led_classdev_unregister(&applesmc_backlight);
+out_light_wq:
+ if (applesmc_light)
+ destroy_workqueue(applesmc_led_wq);
+out_light_sysfs:
+ if (applesmc_light)
+ sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
+out_accelerometer:
+ if (applesmc_accelerometer)
+ applesmc_release_accelerometer();
+out_temperature:
+ sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
+ sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
+out_fan_1:
+ sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
+out_key_enumeration:
+ sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
+out_device:
+ platform_device_unregister(pdev);
+out_driver:
+ platform_driver_unregister(&applesmc_driver);
+out_region:
+ release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
+out:
+ printk(KERN_WARNING "applesmc: driver init failed (ret=%d)!\n", ret);
+ return ret;
+}
+
+static void __exit applesmc_exit(void)
+{
+ hwmon_device_unregister(hwmon_class_dev);
+ if (applesmc_light) {
+ led_classdev_unregister(&applesmc_backlight);
+ destroy_workqueue(applesmc_led_wq);
+ sysfs_remove_file(&pdev->dev.kobj, &dev_attr_light.attr);
+ }
+ if (applesmc_accelerometer)
+ applesmc_release_accelerometer();
+ sysfs_remove_group(&pdev->dev.kobj, &temperature_attributes_group);
+ sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[0]);
+ sysfs_remove_group(&pdev->dev.kobj, &fan_attribute_groups[1]);
+ sysfs_remove_group(&pdev->dev.kobj, &key_enumeration_group);
+ platform_device_unregister(pdev);
+ platform_driver_unregister(&applesmc_driver);
+ release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS);
+
+ printk(KERN_INFO "applesmc: driver unloaded.\n");
+}
+
+module_init(applesmc_init);
+module_exit(applesmc_exit);
+
+MODULE_AUTHOR("Nicolas Boichat");
+MODULE_DESCRIPTION("Apple SMC");
+MODULE_LICENSE("GPL v2");
projects / platform / kernel / linux-rpi.git / commitdiff