| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Henrik Rydberg | 4522 | 75.18% | 23 | 45.10% |
| Nicolas Boichat | 980 | 16.29% | 3 | 5.88% |
| Alex Murray | 172 | 2.86% | 1 | 1.96% |
| René Rebe | 110 | 1.83% | 1 | 1.96% |
| Guenter Roeck | 75 | 1.25% | 5 | 9.80% |
| Dmitry Torokhov | 38 | 0.63% | 2 | 3.92% |
| Bharath Ramesh | 28 | 0.47% | 1 | 1.96% |
| Riki Oktarianto | 26 | 0.43% | 1 | 1.96% |
| Roberto De Ioris | 20 | 0.33% | 1 | 1.96% |
| Joe Perches | 13 | 0.22% | 1 | 1.96% |
| Christoph Hellwig | 5 | 0.08% | 1 | 1.96% |
| Jean Delvare | 4 | 0.07% | 2 | 3.92% |
| Shuah Khan | 4 | 0.07% | 1 | 1.96% |
| Tony Jones | 4 | 0.07% | 1 | 1.96% |
| Guilherme M. Schroeder | 4 | 0.07% | 1 | 1.96% |
| Frans Meulenbroeks | 3 | 0.05% | 1 | 1.96% |
| Parag Warudkar | 2 | 0.03% | 1 | 1.96% |
| Bastien Nocera | 2 | 0.03% | 1 | 1.96% |
| H Hartley Sweeten | 1 | 0.02% | 1 | 1.96% |
| Jiri Slaby | 1 | 0.02% | 1 | 1.96% |
| Jesper Juhl | 1 | 0.02% | 1 | 1.96% |
| Total | 6015 | 51 |
/* * 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> * Copyright (C) 2010 Henrik Rydberg <rydberg@euromail.se> * * Based on hdaps.c driver: * Copyright (C) 2005 Robert Love <rml@novell.com> * Copyright (C) 2005 Jesper Juhl <jj@chaosbits.net> * * 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 */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/delay.h> #include <linux/platform_device.h> #include <linux/input-polldev.h> #include <linux/kernel.h> #include <linux/slab.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> #include <linux/err.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 /* wait up to 128 ms for a status change. */ #define APPLESMC_MIN_WAIT 0x0010 #define APPLESMC_RETRY_WAIT 0x0100 #define APPLESMC_MAX_WAIT 0x20000 #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_ID_FMT "F%dID" /* r-o char[16] */ #define TEMP_SENSOR_TYPE "sp78" /* List of keys used to read/write fan speeds */ static const char *const fan_speed_fmt[] = { "F%dAc", /* actual speed */ "F%dMn", /* minimum speed (rw) */ "F%dMx", /* maximum speed */ "F%dSf", /* safe speed - not all models */ "F%dTg", /* target speed (manual: rw) */ }; #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 to_index(attr) (to_sensor_dev_attr(attr)->index & 0xffff) #define to_option(attr) (to_sensor_dev_attr(attr)->index >> 16) /* Dynamic device node attributes */ struct applesmc_dev_attr { struct sensor_device_attribute sda; /* hwmon attributes */ char name[32]; /* room for node file name */ }; /* Dynamic device node group */ struct applesmc_node_group { char *format; /* format string */ void *show; /* show function */ void *store; /* store function */ int option; /* function argument */ struct applesmc_dev_attr *nodes; /* dynamic node array */ }; /* AppleSMC entry - cached register information */ struct applesmc_entry { char key[5]; /* four-letter key code */ u8 valid; /* set when entry is successfully read once */ u8 len; /* bounded by APPLESMC_MAX_DATA_LENGTH */ char type[5]; /* four-letter type code */ u8 flags; /* 0x10: func; 0x40: write; 0x80: read */ }; /* Register lookup and registers common to all SMCs */ static struct applesmc_registers { struct mutex mutex; /* register read/write mutex */ unsigned int key_count; /* number of SMC registers */ unsigned int fan_count; /* number of fans */ unsigned int temp_count; /* number of temperature registers */ unsigned int temp_begin; /* temperature lower index bound */ unsigned int temp_end; /* temperature upper index bound */ unsigned int index_count; /* size of temperature index array */ int num_light_sensors; /* number of light sensors */ bool has_accelerometer; /* has motion sensor */ bool has_key_backlight; /* has keyboard backlight */ bool init_complete; /* true when fully initialized */ struct applesmc_entry *cache; /* cached key entries */ const char **index; /* temperature key index */ } smcreg = { .mutex = __MUTEX_INITIALIZER(smcreg.mutex), }; 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; /* * 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_read - Wait for a byte to appear on SMC port. Callers must * hold applesmc_lock. */ static int wait_read(void) { u8 status; int us; for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) { udelay(us); status = inb(APPLESMC_CMD_PORT); /* read: wait for smc to settle */ if (status & 0x01) return 0; } pr_warn("wait_read() fail: 0x%02x\n", status); return -EIO; } /* * send_byte - Write to SMC port, retrying when necessary. Callers * must hold applesmc_lock. */ static int send_byte(u8 cmd, u16 port) { u8 status; int us; outb(cmd, port); for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) { udelay(us); status = inb(APPLESMC_CMD_PORT); /* write: wait for smc to settle */ if (status & 0x02) continue; /* ready: cmd accepted, return */ if (status & 0x04) return 0; /* timeout: give up */ if (us << 1 == APPLESMC_MAX_WAIT) break; /* busy: long wait and resend */ udelay(APPLESMC_RETRY_WAIT); outb(cmd, port); } pr_warn("send_byte(0x%02x, 0x%04x) fail: 0x%02x\n", cmd, port, status); return -EIO; } static int send_command(u8 cmd) { return send_byte(cmd, APPLESMC_CMD_PORT); } static int send_argument(const char *key) { int i; for (i = 0; i < 4; i++) if (send_byte(key[i], APPLESMC_DATA_PORT)) return -EIO; return 0; } static int read_smc(u8 cmd, const char *key, u8 *buffer, u8 len) { u8 status, data = 0; int i; if (send_command(cmd) || send_argument(key)) { pr_warn("%.4s: read arg fail\n", key); return -EIO; } /* This has no effect on newer (2012) SMCs */ if (send_byte(len, APPLESMC_DATA_PORT)) { pr_warn("%.4s: read len fail\n", key); return -EIO; } for (i = 0; i < len; i++) { if (wait_read()) { pr_warn("%.4s: read data[%d] fail\n", key, i); return -EIO; } buffer[i] = inb(APPLESMC_DATA_PORT); } /* Read the data port until bit0 is cleared */ for (i = 0; i < 16; i++) { udelay(APPLESMC_MIN_WAIT); status = inb(APPLESMC_CMD_PORT); if (!(status & 0x01)) break; data = inb(APPLESMC_DATA_PORT); } if (i) pr_warn("flushed %d bytes, last value is: %d\n", i, data); return 0; } static int write_smc(u8 cmd, const char *key, const u8 *buffer, u8 len) { int i; if (send_command(cmd) || send_argument(key)) { pr_warn("%s: write arg fail\n", key); return -EIO; } if (send_byte(len, APPLESMC_DATA_PORT)) { pr_warn("%.4s: write len fail\n", key); return -EIO; } for (i = 0; i < len; i++) { if (send_byte(buffer[i], APPLESMC_DATA_PORT)) { pr_warn("%s: write data fail\n", key); return -EIO; } } return 0; } static int read_register_count(unsigned int *count) { __be32 be; int ret; ret = read_smc(APPLESMC_READ_CMD, KEY_COUNT_KEY, (u8 *)&be, 4); if (ret) return ret; *count = be32_to_cpu(be); return 0; } /* * Serialized I/O * * Returns zero on success or a negative error on failure. * All functions below are concurrency safe - callers should NOT hold lock. */ static int applesmc_read_entry(const struct applesmc_entry *entry, u8 *buf, u8 len) { int ret; if (entry->len != len) return -EINVAL; mutex_lock(&smcreg.mutex); ret = read_smc(APPLESMC_READ_CMD, entry->key, buf, len); mutex_unlock(&smcreg.mutex); return ret; } static int applesmc_write_entry(const struct applesmc_entry *entry, const u8 *buf, u8 len) { int ret; if (entry->len != len) return -EINVAL; mutex_lock(&smcreg.mutex); ret = write_smc(APPLESMC_WRITE_CMD, entry->key, buf, len); mutex_unlock(&smcreg.mutex); return ret; } static const struct applesmc_entry *applesmc_get_entry_by_index(int index) { struct applesmc_entry *cache = &smcreg.cache[index]; u8 key[4], info[6]; __be32 be; int ret = 0; if (cache->valid) return cache; mutex_lock(&smcreg.mutex); if (cache->valid) goto out; be = cpu_to_be32(index); ret = read_smc(APPLESMC_GET_KEY_BY_INDEX_CMD, (u8 *)&be, key, 4); if (ret) goto out; ret = read_smc(APPLESMC_GET_KEY_TYPE_CMD, key, info, 6); if (ret) goto out; memcpy(cache->key, key, 4); cache->len = info[0]; memcpy(cache->type, &info[1], 4); cache->flags = info[5]; cache->valid = 1; out: mutex_unlock(&smcreg.mutex); if (ret) return ERR_PTR(ret); return cache; } static int applesmc_get_lower_bound(unsigned int *lo, const char *key) { int begin = 0, end = smcreg.key_count; const struct applesmc_entry *entry; while (begin != end) { int middle = begin + (end - begin) / 2; entry = applesmc_get_entry_by_index(middle); if (IS_ERR(entry)) { *lo = 0; return PTR_ERR(entry); } if (strcmp(entry->key, key) < 0) begin = middle + 1; else end = middle; } *lo = begin; return 0; } static int applesmc_get_upper_bound(unsigned int *hi, const char *key) { int begin = 0, end = smcreg.key_count; const struct applesmc_entry *entry; while (begin != end) { int middle = begin + (end - begin) / 2; entry = applesmc_get_entry_by_index(middle); if (IS_ERR(entry)) { *hi = smcreg.key_count; return PTR_ERR(entry); } if (strcmp(key, entry->key) < 0) end = middle; else begin = middle + 1; } *hi = begin; return 0; } static const struct applesmc_entry *applesmc_get_entry_by_key(const char *key) { int begin, end; int ret; ret = applesmc_get_lower_bound(&begin, key); if (ret) return ERR_PTR(ret); ret = applesmc_get_upper_bound(&end, key); if (ret) return ERR_PTR(ret); if (end - begin != 1) return ERR_PTR(-EINVAL); return applesmc_get_entry_by_index(begin); } static int applesmc_read_key(const char *key, u8 *buffer, u8 len) { const struct applesmc_entry *entry; entry = applesmc_get_entry_by_key(key); if (IS_ERR(entry)) return PTR_ERR(entry); return applesmc_read_entry(entry, buffer, len); } static int applesmc_write_key(const char *key, const u8 *buffer, u8 len) { const struct applesmc_entry *entry; entry = applesmc_get_entry_by_key(key); if (IS_ERR(entry)) return PTR_ERR(entry); return applesmc_write_entry(entry, buffer, len); } static int applesmc_has_key(const char *key, bool *value) { const struct applesmc_entry *entry; entry = applesmc_get_entry_by_key(key); if (IS_ERR(entry) && PTR_ERR(entry) != -EINVAL) return PTR_ERR(entry); *value = !IS_ERR(entry); return 0; } /* * applesmc_read_s16 - Read 16-bit signed big endian register */ static int applesmc_read_s16(const char *key, s16 *value) { u8 buffer[2]; int ret; ret = applesmc_read_key(key, buffer, 2); if (ret) return ret; *value = ((s16)buffer[0] << 8) | buffer[1]; return 0; } /* * applesmc_device_init - initialize the accelerometer. Can sleep. */ static void applesmc_device_init(void) { int total; u8 buffer[2]; if (!smcreg.has_accelerometer) return; for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) { if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) && (buffer[0] != 0x00 || buffer[1] != 0x00)) return; buffer[0] = 0xe0; buffer[1] = 0x00; applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2); msleep(INIT_WAIT_MSECS); } pr_warn("failed to init the device\n"); } static int applesmc_init_index(struct applesmc_registers *s) { const struct applesmc_entry *entry; unsigned int i; if (s->index) return 0; s->index = kcalloc(s->temp_count, sizeof(s->index[0]), GFP_KERNEL); if (!s->index) return -ENOMEM; for (i = s->temp_begin; i < s->temp_end; i++) { entry = applesmc_get_entry_by_index(i); if (IS_ERR(entry)) continue; if (strcmp(entry->type, TEMP_SENSOR_TYPE)) continue; s->index[s->index_count++] = entry->key; } return 0; } /* * applesmc_init_smcreg_try - Try to initialize register cache. Idempotent. */ static int applesmc_init_smcreg_try(void) { struct applesmc_registers *s = &smcreg; bool left_light_sensor = 0, right_light_sensor = 0; unsigned int count; u8 tmp[1]; int ret; if (s->init_complete) return 0; ret = read_register_count(&count); if (ret) return ret; if (s->cache && s->key_count != count) { pr_warn("key count changed from %d to %d\n", s->key_count, count); kfree(s->cache); s->cache = NULL; } s->key_count = count; if (!s->cache) s->cache = kcalloc(s->key_count, sizeof(*s->cache), GFP_KERNEL); if (!s->cache) return -ENOMEM; ret = applesmc_read_key(FANS_COUNT, tmp, 1); if (ret) return ret; s->fan_count = tmp[0]; if (s->fan_count > 10) s->fan_count = 10; ret = applesmc_get_lower_bound(&s->temp_begin, "T"); if (ret) return ret; ret = applesmc_get_lower_bound(&s->temp_end, "U"); if (ret) return ret; s->temp_count = s->temp_end - s->temp_begin; ret = applesmc_init_index(s); if (ret) return ret; ret = applesmc_has_key(LIGHT_SENSOR_LEFT_KEY, &left_light_sensor); if (ret) return ret; ret = applesmc_has_key(LIGHT_SENSOR_RIGHT_KEY, &right_light_sensor); if (ret) return ret; ret = applesmc_has_key(MOTION_SENSOR_KEY, &s->has_accelerometer); if (ret) return ret; ret = applesmc_has_key(BACKLIGHT_KEY, &s->has_key_backlight); if (ret) return ret; s->num_light_sensors = left_light_sensor + right_light_sensor; s->init_complete = true; pr_info("key=%d fan=%d temp=%d index=%d acc=%d lux=%d kbd=%d\n", s->key_count, s->fan_count, s->temp_count, s->index_count, s->has_accelerometer, s->num_light_sensors, s->has_key_backlight); return 0; } static void applesmc_destroy_smcreg(void) { kfree(smcreg.index); smcreg.index = NULL; kfree(smcreg.cache); smcreg.cache = NULL; smcreg.init_complete = false; } /* * applesmc_init_smcreg - Initialize register cache. * * Retries until initialization is successful, or the operation times out. * */ static int applesmc_init_smcreg(void) { int ms, ret; for (ms = 0; ms < INIT_TIMEOUT_MSECS; ms += INIT_WAIT_MSECS) { ret = applesmc_init_smcreg_try(); if (!ret) { if (ms) pr_info("init_smcreg() took %d ms\n", ms); return 0; } msleep(INIT_WAIT_MSECS); } applesmc_destroy_smcreg(); return ret; } /* Device model stuff */ static int applesmc_probe(struct platform_device *dev) { int ret; ret = applesmc_init_smcreg(); if (ret) return ret; applesmc_device_init(); return 0; } /* Synchronize device with memorized backlight state */ static int applesmc_pm_resume(struct device *dev) { if (smcreg.has_key_backlight) applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2); return 0; } /* Reinitialize device on resume from hibernation */ static int applesmc_pm_restore(struct device *dev) { applesmc_device_init(); 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", .pm = &applesmc_pm_ops, }, }; /* * applesmc_calibrate - Set our "resting" values. Callers must * hold applesmc_lock. */ static void applesmc_calibrate(void) { applesmc_read_s16(MOTION_SENSOR_X_KEY, &rest_x); applesmc_read_s16(MOTION_SENSOR_Y_KEY, &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; if (applesmc_read_s16(MOTION_SENSOR_X_KEY, &x)) return; if (applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y)) return; x = -x; input_report_abs(idev, ABS_X, x - rest_x); input_report_abs(idev, ABS_Y, y - rest_y); input_sync(idev); } /* 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; ret = applesmc_read_s16(MOTION_SENSOR_X_KEY, &x); if (ret) goto out; ret = applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y); if (ret) goto out; ret = applesmc_read_s16(MOTION_SENSOR_Z_KEY, &z); if (ret) goto out; out: 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) { const struct applesmc_entry *entry; static int data_length; int ret; u8 left = 0, right = 0; u8 buffer[10]; if (!data_length) { entry = applesmc_get_entry_by_key(LIGHT_SENSOR_LEFT_KEY); if (IS_ERR(entry)) return PTR_ERR(entry); if (entry->len > 10) return -ENXIO; data_length = entry->len; pr_info("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: 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) { const char *key = smcreg.index[to_index(devattr)]; 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) { const char *key = smcreg.index[to_index(devattr)]; int ret; s16 value; int temp; ret = applesmc_read_s16(key, &value); if (ret) return ret; temp = 250 * (value >> 6); return snprintf(sysfsbuf, PAGE_SIZE, "%d\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]; scnprintf(newkey, sizeof(newkey), fan_speed_fmt[to_option(attr)], to_index(attr)); ret = applesmc_read_key(newkey, buffer, 2); speed = ((buffer[0] << 8 | buffer[1]) >> 2); 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; unsigned long speed; char newkey[5]; u8 buffer[2]; if (kstrtoul(sysfsbuf, 10, &speed) < 0 || speed >= 0x4000) return -EINVAL; /* Bigger than a 14-bit value */ scnprintf(newkey, sizeof(newkey), fan_speed_fmt[to_option(attr)], to_index(attr)); buffer[0] = (speed >> 6) & 0xff; buffer[1] = (speed << 2) & 0xff; ret = applesmc_write_key(newkey, buffer, 2); if (ret) return ret; else return count; } static ssize_t applesmc_show_fan_manual(struct device *dev, struct device_attribute *attr, char *sysfsbuf) { int ret; u16 manual = 0; u8 buffer[2]; ret = applesmc_read_key(FANS_MANUAL, buffer, 2); manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01; 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 *attr, const char *sysfsbuf, size_t count) { int ret; u8 buffer[2]; unsigned long input; u16 val; if (kstrtoul(sysfsbuf, 10, &input) < 0) return -EINVAL; ret = applesmc_read_key(FANS_MANUAL, buffer, 2); val = (buffer[0] << 8 | buffer[1]); if (ret) goto out; if (input) val = val | (0x01 << to_index(attr)); else val = val & ~(0x01 << to_index(attr)); buffer[0] = (val >> 8) & 0xFF; buffer[1] = val & 0xFF; ret = applesmc_write_key(FANS_MANUAL, buffer, 2); out: 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]; scnprintf(newkey, sizeof(newkey), FAN_ID_FMT, to_index(attr)); ret = applesmc_read_key(newkey, buffer, 16); buffer[16] = 0; 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) { applesmc_calibrate(); return count; } static void applesmc_backlight_set(struct work_struct *work) { applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2); } 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)) dev_dbg(led_cdev->dev, "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; ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4); count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) + ((u32)buffer[2]<<8) + buffer[3]; 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) { const struct applesmc_entry *entry; int ret; entry = applesmc_get_entry_by_index(key_at_index); if (IS_ERR(entry)) return PTR_ERR(entry); ret = applesmc_read_entry(entry, sysfsbuf, entry->len); if (ret) return ret; return entry->len; } static ssize_t applesmc_key_at_index_data_length_show(struct device *dev, struct device_attribute *attr, char *sysfsbuf) { const struct applesmc_entry *entry; entry = applesmc_get_entry_by_index(key_at_index); if (IS_ERR(entry)) return PTR_ERR(entry); return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", entry->len); } static ssize_t applesmc_key_at_index_type_show(struct device *dev, struct device_attribute *attr, char *sysfsbuf) { const struct applesmc_entry *entry; entry = applesmc_get_entry_by_index(key_at_index); if (IS_ERR(entry)) return PTR_ERR(entry); return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->type); } static ssize_t applesmc_key_at_index_name_show(struct device *dev, struct device_attribute *attr, char *sysfsbuf) { const struct applesmc_entry *entry; entry = applesmc_get_entry_by_index(key_at_index); if (IS_ERR(entry)) return PTR_ERR(entry); return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->key); } 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) { unsigned long newkey; if (kstrtoul(sysfsbuf, 10, &newkey) < 0 || newkey >= smcreg.key_count) return -EINVAL; key_at_index = newkey; return count; } static struct led_classdev applesmc_backlight = { .name = "smc::kbd_backlight", .default_trigger = "nand-disk", .brightness_set = applesmc_brightness_set, }; static struct applesmc_node_group info_group[] = { { "name", applesmc_name_show }, { "key_count", applesmc_key_count_show }, { "key_at_index", applesmc_key_at_index_show, applesmc_key_at_index_store }, { "key_at_index_name", applesmc_key_at_index_name_show }, { "key_at_index_type", applesmc_key_at_index_type_show }, { "key_at_index_data_length", applesmc_key_at_index_data_length_show }, { "key_at_index_data", applesmc_key_at_index_read_show }, { } }; static struct applesmc_node_group accelerometer_group[] = { { "position", applesmc_position_show }, { "calibrate", applesmc_calibrate_show, applesmc_calibrate_store }, { } }; static struct applesmc_node_group light_sensor_group[] = { { "light", applesmc_light_show }, { } }; static struct applesmc_node_group fan_group[] = { { "fan%d_label", applesmc_show_fan_position }, { "fan%d_input", applesmc_show_fan_speed, NULL, 0 }, { "fan%d_min", applesmc_show_fan_speed, applesmc_store_fan_speed, 1 }, { "fan%d_max", applesmc_show_fan_speed, NULL, 2 }, { "fan%d_safe", applesmc_show_fan_speed, NULL, 3 }, { "fan%d_output", applesmc_show_fan_speed, applesmc_store_fan_speed, 4 }, { "fan%d_manual", applesmc_show_fan_manual, applesmc_store_fan_manual }, { } }; static struct applesmc_node_group temp_group[] = { { "temp%d_label", applesmc_show_sensor_label }, { "temp%d_input", applesmc_show_temperature }, { } }; /* Module stuff */ /* * applesmc_destroy_nodes - remove files and free associated memory */ static void applesmc_destroy_nodes(struct applesmc_node_group *groups) { struct applesmc_node_group *grp; struct applesmc_dev_attr *node; for (grp = groups; grp->nodes; grp++) { for (node = grp->nodes; node->sda.dev_attr.attr.name; node++) sysfs_remove_file(&pdev->dev.kobj, &node->sda.dev_attr.attr); kfree(grp->nodes); grp->nodes = NULL; } } /* * applesmc_create_nodes - create a two-dimensional group of sysfs files */ static int applesmc_create_nodes(struct applesmc_node_group *groups, int num) { struct applesmc_node_group *grp; struct applesmc_dev_attr *node; struct attribute *attr; int ret, i; for (grp = groups; grp->format; grp++) { grp->nodes = kcalloc(num + 1, sizeof(*node), GFP_KERNEL); if (!grp->nodes) { ret = -ENOMEM; goto out; } for (i = 0; i < num; i++) { node = &grp->nodes[i]; scnprintf(node->name, sizeof(node->name), grp->format, i + 1); node->sda.index = (grp->option << 16) | (i & 0xffff); node->sda.dev_attr.show = grp->show; node->sda.dev_attr.store = grp->store; attr = &node->sda.dev_attr.attr; sysfs_attr_init(attr); attr->name = node->name; attr->mode = 0444 | (grp->store ? 0200 : 0); ret = sysfs_create_file(&pdev->dev.kobj, attr); if (ret) { attr->name = NULL; goto out; } } } return 0; out: applesmc_destroy_nodes(groups); return ret; } /* Create accelerometer resources */ static int applesmc_create_accelerometer(void) { struct input_dev *idev; int ret; if (!smcreg.has_accelerometer) return 0; ret = applesmc_create_nodes(accelerometer_group, 1); 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: applesmc_destroy_nodes(accelerometer_group); out: pr_warn("driver init failed (ret=%d)!\n", ret); return ret; } /* Release all resources used by the accelerometer */ static void applesmc_release_accelerometer(void) { if (!smcreg.has_accelerometer) return; input_unregister_polled_device(applesmc_idev); input_free_polled_device(applesmc_idev); applesmc_destroy_nodes(accelerometer_group); } static int applesmc_create_light_sensor(void) { if (!smcreg.num_light_sensors) return 0; return applesmc_create_nodes(light_sensor_group, 1); } static void applesmc_release_light_sensor(void) { if (!smcreg.num_light_sensors) return; applesmc_destroy_nodes(light_sensor_group); } static int applesmc_create_key_backlight(void) { if (!smcreg.has_key_backlight) return 0; applesmc_led_wq = create_singlethread_workqueue("applesmc-led"); if (!applesmc_led_wq) return -ENOMEM; return led_classdev_register(&pdev->dev, &applesmc_backlight); } static void applesmc_release_key_backlight(void) { if (!smcreg.has_key_backlight) return; led_classdev_unregister(&applesmc_backlight); destroy_workqueue(applesmc_led_wq); } static int applesmc_dmi_match(const struct dmi_system_id *id) { return 1; } /* * Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1". * So we need to put "Apple MacBook Pro" before "Apple MacBook". */ static const struct dmi_system_id applesmc_whitelist[] __initconst = { { applesmc_dmi_match, "Apple MacBook Air", { DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") }, }, { applesmc_dmi_match, "Apple MacBook Pro", { DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro") }, }, { applesmc_dmi_match, "Apple MacBook", { DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), DMI_MATCH(DMI_PRODUCT_NAME, "MacBook") }, }, { applesmc_dmi_match, "Apple Macmini", { DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), DMI_MATCH(DMI_PRODUCT_NAME, "Macmini") }, }, { applesmc_dmi_match, "Apple MacPro", { DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), DMI_MATCH(DMI_PRODUCT_NAME, "MacPro") }, }, { applesmc_dmi_match, "Apple iMac", { DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), DMI_MATCH(DMI_PRODUCT_NAME, "iMac") }, }, { .ident = NULL } }; static int __init applesmc_init(void) { int ret; if (!dmi_check_system(applesmc_whitelist)) { pr_warn("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; } /* create register cache */ ret = applesmc_init_smcreg(); if (ret) goto out_device; ret = applesmc_create_nodes(info_group, 1); if (ret) goto out_smcreg; ret = applesmc_create_nodes(fan_group, smcreg.fan_count); if (ret) goto out_info; ret = applesmc_create_nodes(temp_group, smcreg.index_count); if (ret) goto out_fans; ret = applesmc_create_accelerometer(); if (ret) goto out_temperature; ret = applesmc_create_light_sensor(); if (ret) goto out_accelerometer; ret = applesmc_create_key_backlight(); if (ret) goto out_light_sysfs; hwmon_dev = hwmon_device_register(&pdev->dev); if (IS_ERR(hwmon_dev)) { ret = PTR_ERR(hwmon_dev); goto out_light_ledclass; } return 0; out_light_ledclass: applesmc_release_key_backlight(); out_light_sysfs: applesmc_release_light_sensor(); out_accelerometer: applesmc_release_accelerometer(); out_temperature: applesmc_destroy_nodes(temp_group); out_fans: applesmc_destroy_nodes(fan_group); out_info: applesmc_destroy_nodes(info_group); out_smcreg: applesmc_destroy_smcreg(); out_device: platform_device_unregister(pdev); out_driver: platform_driver_unregister(&applesmc_driver); out_region: release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); out: pr_warn("driver init failed (ret=%d)!\n", ret); return ret; } static void __exit applesmc_exit(void) { hwmon_device_unregister(hwmon_dev); applesmc_release_key_backlight(); applesmc_release_light_sensor(); applesmc_release_accelerometer(); applesmc_destroy_nodes(temp_group); applesmc_destroy_nodes(fan_group); applesmc_destroy_nodes(info_group); applesmc_destroy_smcreg(); platform_device_unregister(pdev); platform_driver_unregister(&applesmc_driver); release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); } module_init(applesmc_init); module_exit(applesmc_exit); MODULE_AUTHOR("Nicolas Boichat"); MODULE_DESCRIPTION("Apple SMC"); MODULE_LICENSE("GPL v2"); MODULE_DEVICE_TABLE(dmi, applesmc_whitelist);
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