/* * 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-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 <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). */ static const char* temperature_sensors_sets[][36] = { /* Set 0: Macbook Pro */ { "TA0P", "TB0T", "TC0D", "TC0P", "TG0H", "TG0P", "TG0T", "Th0H", "Th1H", "Tm0P", "Ts0P", "Ts1P", NULL }, /* Set 1: Macbook set */ { "TB0T", "TC0D", "TC0P", "TM0P", "TN0P", "TN1P", "Th0H", "Th0S", "Th1H", "Ts0P", NULL }, /* Set 2: Macmini set */ { "TC0D", "TC0P", NULL }, /* Set 3: 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 }, }; /* 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 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; /* 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 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 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) { 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(name, 0444, applesmc_name_show, NULL); 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##_label, 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##_label.dev_attr.attr, \ NULL \ }; /* * Create the needed functions for each fan using the macro defined above * (4 fans are supported) */ sysfs_fan_speeds_offset(1); sysfs_fan_speeds_offset(2); sysfs_fan_speeds_offset(3); sysfs_fan_speeds_offset(4); static const struct attribute_group fan_attribute_groups[] = { { .attrs = fan1_attributes }, { .attrs = fan2_attributes }, { .attrs = fan3_attributes }, { .attrs = fan4_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 SENSOR_DEVICE_ATTR(temp13_input, S_IRUGO, applesmc_show_temperature, NULL, 12); static SENSOR_DEVICE_ATTR(temp14_input, S_IRUGO, applesmc_show_temperature, NULL, 13); static SENSOR_DEVICE_ATTR(temp15_input, S_IRUGO, applesmc_show_temperature, NULL, 14); static SENSOR_DEVICE_ATTR(temp16_input, S_IRUGO, applesmc_show_temperature, NULL, 15); static SENSOR_DEVICE_ATTR(temp17_input, S_IRUGO, applesmc_show_temperature, NULL, 16); static SENSOR_DEVICE_ATTR(temp18_input, S_IRUGO, applesmc_show_temperature, NULL, 17); static SENSOR_DEVICE_ATTR(temp19_input, S_IRUGO, applesmc_show_temperature, NULL, 18); static SENSOR_DEVICE_ATTR(temp20_input, S_IRUGO, applesmc_show_temperature, NULL, 19); static SENSOR_DEVICE_ATTR(temp21_input, S_IRUGO, applesmc_show_temperature, NULL, 20); static SENSOR_DEVICE_ATTR(temp22_input, S_IRUGO, applesmc_show_temperature, NULL, 21); static SENSOR_DEVICE_ATTR(temp23_input, S_IRUGO, applesmc_show_temperature, NULL, 22); static SENSOR_DEVICE_ATTR(temp24_input, S_IRUGO, applesmc_show_temperature, NULL, 23); static SENSOR_DEVICE_ATTR(temp25_input, S_IRUGO, applesmc_show_temperature, NULL, 24); static SENSOR_DEVICE_ATTR(temp26_input, S_IRUGO, applesmc_show_temperature, NULL, 25); static SENSOR_DEVICE_ATTR(temp27_input, S_IRUGO, applesmc_show_temperature, NULL, 26); static SENSOR_DEVICE_ATTR(temp28_input, S_IRUGO, applesmc_show_temperature, NULL, 27); static SENSOR_DEVICE_ATTR(temp29_input, S_IRUGO, applesmc_show_temperature, NULL, 28); static SENSOR_DEVICE_ATTR(temp30_input, S_IRUGO, applesmc_show_temperature, NULL, 29); static SENSOR_DEVICE_ATTR(temp31_input, S_IRUGO, applesmc_show_temperature, NULL, 30); static SENSOR_DEVICE_ATTR(temp32_input, S_IRUGO, applesmc_show_temperature, NULL, 31); static SENSOR_DEVICE_ATTR(temp33_input, S_IRUGO, applesmc_show_temperature, NULL, 32); static SENSOR_DEVICE_ATTR(temp34_input, S_IRUGO, applesmc_show_temperature, NULL, 33); static SENSOR_DEVICE_ATTR(temp35_input, S_IRUGO, applesmc_show_temperature, NULL, 34); 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, &sensor_dev_attr_temp13_input.dev_attr.attr, &sensor_dev_attr_temp14_input.dev_attr.attr, &sensor_dev_attr_temp15_input.dev_attr.attr, &sensor_dev_attr_temp16_input.dev_attr.attr, &sensor_dev_attr_temp17_input.dev_attr.attr, &sensor_dev_attr_temp18_input.dev_attr.attr, &sensor_dev_attr_temp19_input.dev_attr.attr, &sensor_dev_attr_temp20_input.dev_attr.attr, &sensor_dev_attr_temp21_input.dev_attr.attr, &sensor_dev_attr_temp22_input.dev_attr.attr, &sensor_dev_attr_temp23_input.dev_attr.attr, &sensor_dev_attr_temp24_input.dev_attr.attr, &sensor_dev_attr_temp25_input.dev_attr.attr, &sensor_dev_attr_temp26_input.dev_attr.attr, &sensor_dev_attr_temp27_input.dev_attr.attr, &sensor_dev_attr_temp28_input.dev_attr.attr, &sensor_dev_attr_temp29_input.dev_attr.attr, &sensor_dev_attr_temp30_input.dev_attr.attr, &sensor_dev_attr_temp31_input.dev_attr.attr, &sensor_dev_attr_temp32_input.dev_attr.attr, &sensor_dev_attr_temp33_input.dev_attr.attr, &sensor_dev_attr_temp34_input.dev_attr.attr, &sensor_dev_attr_temp35_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(const 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) { struct input_dev *idev; int ret; ret = sysfs_create_group(&pdev->dev.kobj, &accelerometer_attributes_group); if (ret) goto out; applesmc_idev = input_allocate_polled_device(); if (!applesmc_idev) { ret = -ENOMEM; goto out_sysfs; } applesmc_idev->poll = applesmc_idev_poll; applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL; /* initial calibrate for the input device */ applesmc_calibrate(); /* initialize the input device */ idev = applesmc_idev->input; idev->name = "applesmc"; idev->id.bustype = BUS_HOST; idev->dev.parent = &pdev->dev; idev->evbit[0] = BIT_MASK(EV_ABS); input_set_abs_params(idev, ABS_X, -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); input_set_abs_params(idev, ABS_Y, -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); ret = input_register_polled_device(applesmc_idev); if (ret) goto out_idev; return 0; out_idev: input_free_polled_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) { input_unregister_polled_device(applesmc_idev); input_free_polled_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 1 */ { .accelerometer = 1, .light = 0, .temperature_set = 1 }, /* MacMini: temperature set 2 */ { .accelerometer = 0, .light = 0, .temperature_set = 2 }, /* MacPro: temperature set 3 */ { .accelerometer = 0, .light = 0, .temperature_set = 3 }, }; /* 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]}, { applesmc_dmi_match, "Apple MacPro2", { DMI_MATCH(DMI_BOARD_VENDOR,"Apple"), DMI_MATCH(DMI_PRODUCT_NAME,"MacPro2") }, (void*)&applesmc_dmi_data[3]}, { .ident = NULL } }; static int __init applesmc_init(void) { int ret; int count; int i; 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", APPLESMC_DATA_PORT, NULL, 0); if (IS_ERR(pdev)) { ret = PTR_ERR(pdev); goto out_driver; } ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_name.attr); if (ret) goto out_device; /* Create key enumeration sysfs files */ ret = sysfs_create_group(&pdev->dev.kobj, &key_enumeration_group); if (ret) goto out_name; /* 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 4 fans found," " but at most 4 fans are supported" " by the driver.\n"); case 4: ret = sysfs_create_group(&pdev->dev.kobj, &fan_attribute_groups[3]); if (ret) goto out_key_enumeration; case 3: ret = sysfs_create_group(&pdev->dev.kobj, &fan_attribute_groups[2]); if (ret) goto out_key_enumeration; 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_dev = hwmon_device_register(&pdev->dev); if (IS_ERR(hwmon_dev)) { ret = PTR_ERR(hwmon_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_name: sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr); 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_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); sysfs_remove_file(&pdev->dev.kobj, &dev_attr_name.attr); 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");