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1419 lines
33 KiB
1419 lines
33 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* drivers/hwmon/applesmc.c - driver for Apple's SMC (accelerometer, temperature |
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* sensors, fan control, keyboard backlight control) used in Intel-based Apple |
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* computers. |
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* |
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* Copyright (C) 2007 Nicolas Boichat <[email protected]> |
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* Copyright (C) 2010 Henrik Rydberg <[email protected]> |
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* |
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* Based on hdaps.c driver: |
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* Copyright (C) 2005 Robert Love <[email protected]> |
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* Copyright (C) 2005 Jesper Juhl <[email protected]> |
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* |
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* Fan control based on smcFanControl: |
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* Copyright (C) 2006 Hendrik Holtmann <[email protected]> |
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*/ |
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|
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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|
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#include <linux/delay.h> |
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#include <linux/platform_device.h> |
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#include <linux/input.h> |
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#include <linux/kernel.h> |
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#include <linux/slab.h> |
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#include <linux/module.h> |
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#include <linux/timer.h> |
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#include <linux/dmi.h> |
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#include <linux/mutex.h> |
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#include <linux/hwmon-sysfs.h> |
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#include <linux/io.h> |
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#include <linux/leds.h> |
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#include <linux/hwmon.h> |
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#include <linux/workqueue.h> |
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#include <linux/err.h> |
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#include <linux/bits.h> |
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|
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/* data port used by Apple SMC */ |
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#define APPLESMC_DATA_PORT 0x300 |
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/* command/status port used by Apple SMC */ |
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#define APPLESMC_CMD_PORT 0x304 |
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|
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#define APPLESMC_NR_PORTS 32 /* 0x300-0x31f */ |
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|
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#define APPLESMC_MAX_DATA_LENGTH 32 |
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|
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/* Apple SMC status bits */ |
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#define SMC_STATUS_AWAITING_DATA BIT(0) /* SMC has data waiting to be read */ |
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#define SMC_STATUS_IB_CLOSED BIT(1) /* Will ignore any input */ |
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#define SMC_STATUS_BUSY BIT(2) /* Command in progress */ |
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|
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/* Initial wait is 8us */ |
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#define APPLESMC_MIN_WAIT 0x0008 |
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|
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#define APPLESMC_READ_CMD 0x10 |
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#define APPLESMC_WRITE_CMD 0x11 |
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#define APPLESMC_GET_KEY_BY_INDEX_CMD 0x12 |
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#define APPLESMC_GET_KEY_TYPE_CMD 0x13 |
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|
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#define KEY_COUNT_KEY "#KEY" /* r-o ui32 */ |
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|
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#define LIGHT_SENSOR_LEFT_KEY "ALV0" /* r-o {alv (6-10 bytes) */ |
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#define LIGHT_SENSOR_RIGHT_KEY "ALV1" /* r-o {alv (6-10 bytes) */ |
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#define BACKLIGHT_KEY "LKSB" /* w-o {lkb (2 bytes) */ |
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|
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#define CLAMSHELL_KEY "MSLD" /* r-o ui8 (unused) */ |
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|
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#define MOTION_SENSOR_X_KEY "MO_X" /* r-o sp78 (2 bytes) */ |
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#define MOTION_SENSOR_Y_KEY "MO_Y" /* r-o sp78 (2 bytes) */ |
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#define MOTION_SENSOR_Z_KEY "MO_Z" /* r-o sp78 (2 bytes) */ |
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#define MOTION_SENSOR_KEY "MOCN" /* r/w ui16 */ |
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|
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#define FANS_COUNT "FNum" /* r-o ui8 */ |
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#define FANS_MANUAL "FS! " /* r-w ui16 */ |
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#define FAN_ID_FMT "F%dID" /* r-o char[16] */ |
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|
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#define TEMP_SENSOR_TYPE "sp78" |
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|
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/* List of keys used to read/write fan speeds */ |
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static const char *const fan_speed_fmt[] = { |
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"F%dAc", /* actual speed */ |
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"F%dMn", /* minimum speed (rw) */ |
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"F%dMx", /* maximum speed */ |
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"F%dSf", /* safe speed - not all models */ |
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"F%dTg", /* target speed (manual: rw) */ |
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}; |
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|
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#define INIT_TIMEOUT_MSECS 5000 /* wait up to 5s for device init ... */ |
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#define INIT_WAIT_MSECS 50 /* ... in 50ms increments */ |
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|
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#define APPLESMC_POLL_INTERVAL 50 /* msecs */ |
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#define APPLESMC_INPUT_FUZZ 4 /* input event threshold */ |
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#define APPLESMC_INPUT_FLAT 4 |
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|
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#define to_index(attr) (to_sensor_dev_attr(attr)->index & 0xffff) |
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#define to_option(attr) (to_sensor_dev_attr(attr)->index >> 16) |
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|
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/* Dynamic device node attributes */ |
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struct applesmc_dev_attr { |
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struct sensor_device_attribute sda; /* hwmon attributes */ |
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char name[32]; /* room for node file name */ |
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}; |
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|
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/* Dynamic device node group */ |
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struct applesmc_node_group { |
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char *format; /* format string */ |
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void *show; /* show function */ |
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void *store; /* store function */ |
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int option; /* function argument */ |
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struct applesmc_dev_attr *nodes; /* dynamic node array */ |
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}; |
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|
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/* AppleSMC entry - cached register information */ |
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struct applesmc_entry { |
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char key[5]; /* four-letter key code */ |
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u8 valid; /* set when entry is successfully read once */ |
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u8 len; /* bounded by APPLESMC_MAX_DATA_LENGTH */ |
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char type[5]; /* four-letter type code */ |
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u8 flags; /* 0x10: func; 0x40: write; 0x80: read */ |
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}; |
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|
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/* Register lookup and registers common to all SMCs */ |
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static struct applesmc_registers { |
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struct mutex mutex; /* register read/write mutex */ |
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unsigned int key_count; /* number of SMC registers */ |
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unsigned int fan_count; /* number of fans */ |
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unsigned int temp_count; /* number of temperature registers */ |
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unsigned int temp_begin; /* temperature lower index bound */ |
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unsigned int temp_end; /* temperature upper index bound */ |
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unsigned int index_count; /* size of temperature index array */ |
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int num_light_sensors; /* number of light sensors */ |
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bool has_accelerometer; /* has motion sensor */ |
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bool has_key_backlight; /* has keyboard backlight */ |
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bool init_complete; /* true when fully initialized */ |
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struct applesmc_entry *cache; /* cached key entries */ |
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const char **index; /* temperature key index */ |
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} smcreg = { |
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.mutex = __MUTEX_INITIALIZER(smcreg.mutex), |
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}; |
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|
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static const int debug; |
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static struct platform_device *pdev; |
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static s16 rest_x; |
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static s16 rest_y; |
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static u8 backlight_state[2]; |
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|
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static struct device *hwmon_dev; |
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static struct input_dev *applesmc_idev; |
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|
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/* |
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* Last index written to key_at_index sysfs file, and value to use for all other |
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* key_at_index_* sysfs files. |
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*/ |
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static unsigned int key_at_index; |
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|
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static struct workqueue_struct *applesmc_led_wq; |
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|
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/* |
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* Wait for specific status bits with a mask on the SMC. |
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* Used before all transactions. |
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* This does 10 fast loops of 8us then exponentially backs off for a |
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* minimum total wait of 262ms. Depending on usleep_range this could |
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* run out past 500ms. |
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*/ |
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|
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static int wait_status(u8 val, u8 mask) |
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{ |
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u8 status; |
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int us; |
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int i; |
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|
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us = APPLESMC_MIN_WAIT; |
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for (i = 0; i < 24 ; i++) { |
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status = inb(APPLESMC_CMD_PORT); |
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if ((status & mask) == val) |
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return 0; |
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usleep_range(us, us * 2); |
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if (i > 9) |
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us <<= 1; |
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} |
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return -EIO; |
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} |
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|
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/* send_byte - Write to SMC data port. Callers must hold applesmc_lock. */ |
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|
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static int send_byte(u8 cmd, u16 port) |
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{ |
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int status; |
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|
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status = wait_status(0, SMC_STATUS_IB_CLOSED); |
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if (status) |
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return status; |
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/* |
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* This needs to be a separate read looking for bit 0x04 |
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* after bit 0x02 falls. If consolidated with the wait above |
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* this extra read may not happen if status returns both |
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* simultaneously and this would appear to be required. |
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*/ |
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status = wait_status(SMC_STATUS_BUSY, SMC_STATUS_BUSY); |
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if (status) |
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return status; |
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outb(cmd, port); |
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return 0; |
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} |
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|
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/* send_command - Write a command to the SMC. Callers must hold applesmc_lock. */ |
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|
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static int send_command(u8 cmd) |
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{ |
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int ret; |
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ret = wait_status(0, SMC_STATUS_IB_CLOSED); |
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if (ret) |
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return ret; |
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outb(cmd, APPLESMC_CMD_PORT); |
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return 0; |
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} |
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|
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/* |
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* Based on logic from the Apple driver. This is issued before any interaction |
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* If busy is stuck high, issue a read command to reset the SMC state machine. |
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* If busy is stuck high after the command then the SMC is jammed. |
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*/ |
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|
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static int smc_sane(void) |
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{ |
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int ret; |
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ret = wait_status(0, SMC_STATUS_BUSY); |
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if (!ret) |
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return ret; |
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ret = send_command(APPLESMC_READ_CMD); |
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if (ret) |
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return ret; |
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return wait_status(0, SMC_STATUS_BUSY); |
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} |
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static int send_argument(const char *key) |
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{ |
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int i; |
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for (i = 0; i < 4; i++) |
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if (send_byte(key[i], APPLESMC_DATA_PORT)) |
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return -EIO; |
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return 0; |
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} |
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static int read_smc(u8 cmd, const char *key, u8 *buffer, u8 len) |
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{ |
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u8 status, data = 0; |
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int i; |
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int ret; |
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ret = smc_sane(); |
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if (ret) |
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return ret; |
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if (send_command(cmd) || send_argument(key)) { |
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pr_warn("%.4s: read arg fail\n", key); |
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return -EIO; |
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} |
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/* This has no effect on newer (2012) SMCs */ |
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if (send_byte(len, APPLESMC_DATA_PORT)) { |
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pr_warn("%.4s: read len fail\n", key); |
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return -EIO; |
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} |
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for (i = 0; i < len; i++) { |
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if (wait_status(SMC_STATUS_AWAITING_DATA | SMC_STATUS_BUSY, |
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SMC_STATUS_AWAITING_DATA | SMC_STATUS_BUSY)) { |
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pr_warn("%.4s: read data[%d] fail\n", key, i); |
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return -EIO; |
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} |
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buffer[i] = inb(APPLESMC_DATA_PORT); |
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} |
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/* Read the data port until bit0 is cleared */ |
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for (i = 0; i < 16; i++) { |
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udelay(APPLESMC_MIN_WAIT); |
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status = inb(APPLESMC_CMD_PORT); |
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if (!(status & SMC_STATUS_AWAITING_DATA)) |
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break; |
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data = inb(APPLESMC_DATA_PORT); |
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} |
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if (i) |
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pr_warn("flushed %d bytes, last value is: %d\n", i, data); |
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return wait_status(0, SMC_STATUS_BUSY); |
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} |
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static int write_smc(u8 cmd, const char *key, const u8 *buffer, u8 len) |
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{ |
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int i; |
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int ret; |
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ret = smc_sane(); |
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if (ret) |
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return ret; |
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if (send_command(cmd) || send_argument(key)) { |
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pr_warn("%s: write arg fail\n", key); |
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return -EIO; |
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} |
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if (send_byte(len, APPLESMC_DATA_PORT)) { |
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pr_warn("%.4s: write len fail\n", key); |
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return -EIO; |
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} |
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for (i = 0; i < len; i++) { |
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if (send_byte(buffer[i], APPLESMC_DATA_PORT)) { |
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pr_warn("%s: write data fail\n", key); |
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return -EIO; |
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} |
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} |
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return wait_status(0, SMC_STATUS_BUSY); |
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} |
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static int read_register_count(unsigned int *count) |
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{ |
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__be32 be; |
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int ret; |
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ret = read_smc(APPLESMC_READ_CMD, KEY_COUNT_KEY, (u8 *)&be, 4); |
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if (ret) |
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return ret; |
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*count = be32_to_cpu(be); |
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return 0; |
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} |
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/* |
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* Serialized I/O |
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* |
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* Returns zero on success or a negative error on failure. |
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* All functions below are concurrency safe - callers should NOT hold lock. |
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*/ |
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static int applesmc_read_entry(const struct applesmc_entry *entry, |
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u8 *buf, u8 len) |
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{ |
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int ret; |
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if (entry->len != len) |
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return -EINVAL; |
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mutex_lock(&smcreg.mutex); |
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ret = read_smc(APPLESMC_READ_CMD, entry->key, buf, len); |
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mutex_unlock(&smcreg.mutex); |
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return ret; |
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} |
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static int applesmc_write_entry(const struct applesmc_entry *entry, |
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const u8 *buf, u8 len) |
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{ |
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int ret; |
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if (entry->len != len) |
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return -EINVAL; |
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mutex_lock(&smcreg.mutex); |
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ret = write_smc(APPLESMC_WRITE_CMD, entry->key, buf, len); |
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mutex_unlock(&smcreg.mutex); |
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return ret; |
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} |
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static const struct applesmc_entry *applesmc_get_entry_by_index(int index) |
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{ |
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struct applesmc_entry *cache = &smcreg.cache[index]; |
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u8 key[4], info[6]; |
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__be32 be; |
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int ret = 0; |
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if (cache->valid) |
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return cache; |
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mutex_lock(&smcreg.mutex); |
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|
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if (cache->valid) |
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goto out; |
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be = cpu_to_be32(index); |
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ret = read_smc(APPLESMC_GET_KEY_BY_INDEX_CMD, (u8 *)&be, key, 4); |
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if (ret) |
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goto out; |
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ret = read_smc(APPLESMC_GET_KEY_TYPE_CMD, key, info, 6); |
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if (ret) |
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goto out; |
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memcpy(cache->key, key, 4); |
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cache->len = info[0]; |
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memcpy(cache->type, &info[1], 4); |
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cache->flags = info[5]; |
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cache->valid = 1; |
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|
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out: |
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mutex_unlock(&smcreg.mutex); |
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if (ret) |
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return ERR_PTR(ret); |
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return cache; |
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} |
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static int applesmc_get_lower_bound(unsigned int *lo, const char *key) |
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{ |
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int begin = 0, end = smcreg.key_count; |
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const struct applesmc_entry *entry; |
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|
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while (begin != end) { |
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int middle = begin + (end - begin) / 2; |
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entry = applesmc_get_entry_by_index(middle); |
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if (IS_ERR(entry)) { |
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*lo = 0; |
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return PTR_ERR(entry); |
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} |
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if (strcmp(entry->key, key) < 0) |
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begin = middle + 1; |
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else |
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end = middle; |
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} |
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|
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*lo = begin; |
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return 0; |
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} |
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static int applesmc_get_upper_bound(unsigned int *hi, const char *key) |
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{ |
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int begin = 0, end = smcreg.key_count; |
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const struct applesmc_entry *entry; |
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|
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while (begin != end) { |
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int middle = begin + (end - begin) / 2; |
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entry = applesmc_get_entry_by_index(middle); |
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if (IS_ERR(entry)) { |
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*hi = smcreg.key_count; |
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return PTR_ERR(entry); |
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} |
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if (strcmp(key, entry->key) < 0) |
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end = middle; |
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else |
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begin = middle + 1; |
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} |
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*hi = begin; |
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return 0; |
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} |
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static const struct applesmc_entry *applesmc_get_entry_by_key(const char *key) |
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{ |
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int begin, end; |
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int ret; |
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ret = applesmc_get_lower_bound(&begin, key); |
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if (ret) |
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return ERR_PTR(ret); |
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ret = applesmc_get_upper_bound(&end, key); |
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if (ret) |
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return ERR_PTR(ret); |
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if (end - begin != 1) |
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return ERR_PTR(-EINVAL); |
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|
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return applesmc_get_entry_by_index(begin); |
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} |
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static int applesmc_read_key(const char *key, u8 *buffer, u8 len) |
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{ |
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const struct applesmc_entry *entry; |
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|
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entry = applesmc_get_entry_by_key(key); |
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if (IS_ERR(entry)) |
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return PTR_ERR(entry); |
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|
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return applesmc_read_entry(entry, buffer, len); |
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} |
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static int applesmc_write_key(const char *key, const u8 *buffer, u8 len) |
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{ |
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const struct applesmc_entry *entry; |
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|
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entry = applesmc_get_entry_by_key(key); |
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if (IS_ERR(entry)) |
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return PTR_ERR(entry); |
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|
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return applesmc_write_entry(entry, buffer, len); |
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} |
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static int applesmc_has_key(const char *key, bool *value) |
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{ |
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const struct applesmc_entry *entry; |
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|
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entry = applesmc_get_entry_by_key(key); |
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if (IS_ERR(entry) && PTR_ERR(entry) != -EINVAL) |
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return PTR_ERR(entry); |
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|
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*value = !IS_ERR(entry); |
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return 0; |
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} |
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|
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/* |
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* applesmc_read_s16 - Read 16-bit signed big endian register |
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*/ |
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static int applesmc_read_s16(const char *key, s16 *value) |
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{ |
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u8 buffer[2]; |
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int ret; |
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|
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ret = applesmc_read_key(key, buffer, 2); |
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if (ret) |
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return ret; |
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|
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*value = ((s16)buffer[0] << 8) | buffer[1]; |
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return 0; |
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} |
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|
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/* |
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* applesmc_device_init - initialize the accelerometer. Can sleep. |
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*/ |
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static void applesmc_device_init(void) |
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{ |
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int total; |
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u8 buffer[2]; |
|
|
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if (!smcreg.has_accelerometer) |
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return; |
|
|
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for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) { |
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if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) && |
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(buffer[0] != 0x00 || buffer[1] != 0x00)) |
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return; |
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buffer[0] = 0xe0; |
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buffer[1] = 0x00; |
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applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2); |
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msleep(INIT_WAIT_MSECS); |
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} |
|
|
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pr_warn("failed to init the device\n"); |
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} |
|
|
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static int applesmc_init_index(struct applesmc_registers *s) |
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{ |
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const struct applesmc_entry *entry; |
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unsigned int i; |
|
|
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if (s->index) |
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return 0; |
|
|
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s->index = kcalloc(s->temp_count, sizeof(s->index[0]), GFP_KERNEL); |
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if (!s->index) |
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return -ENOMEM; |
|
|
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for (i = s->temp_begin; i < s->temp_end; i++) { |
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entry = applesmc_get_entry_by_index(i); |
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if (IS_ERR(entry)) |
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continue; |
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if (strcmp(entry->type, TEMP_SENSOR_TYPE)) |
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continue; |
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s->index[s->index_count++] = entry->key; |
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} |
|
|
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return 0; |
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} |
|
|
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/* |
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* applesmc_init_smcreg_try - Try to initialize register cache. Idempotent. |
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*/ |
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static int applesmc_init_smcreg_try(void) |
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{ |
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struct applesmc_registers *s = &smcreg; |
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bool left_light_sensor = false, right_light_sensor = false; |
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unsigned int count; |
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u8 tmp[1]; |
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int ret; |
|
|
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if (s->init_complete) |
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return 0; |
|
|
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ret = read_register_count(&count); |
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if (ret) |
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return ret; |
|
|
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if (s->cache && s->key_count != count) { |
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pr_warn("key count changed from %d to %d\n", |
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s->key_count, count); |
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kfree(s->cache); |
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s->cache = NULL; |
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} |
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s->key_count = count; |
|
|
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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_dev *idev) |
|
{ |
|
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 sysfs_emit(buf, "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; |
|
|
|
return sysfs_emit(buf, "(%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); |
|
if (ret) |
|
goto out; |
|
/* 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]; |
|
|
|
ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length); |
|
if (ret) |
|
goto out; |
|
right = buffer[2]; |
|
|
|
out: |
|
if (ret) |
|
return ret; |
|
|
|
return sysfs_emit(sysfsbuf, "(%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 sysfs_emit(sysfsbuf, "%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 sysfs_emit(sysfsbuf, "%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); |
|
if (ret) |
|
return ret; |
|
|
|
speed = ((buffer[0] << 8 | buffer[1]) >> 2); |
|
return sysfs_emit(sysfsbuf, "%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); |
|
if (ret) |
|
return ret; |
|
|
|
manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01; |
|
return sysfs_emit(sysfsbuf, "%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); |
|
if (ret) |
|
goto out; |
|
|
|
val = (buffer[0] << 8 | buffer[1]); |
|
|
|
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; |
|
|
|
return sysfs_emit(sysfsbuf, "%s\n", buffer + 4); |
|
} |
|
|
|
static ssize_t applesmc_calibrate_show(struct device *dev, |
|
struct device_attribute *attr, char *sysfsbuf) |
|
{ |
|
return sysfs_emit(sysfsbuf, "(%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); |
|
if (ret) |
|
return ret; |
|
|
|
count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) + |
|
((u32)buffer[2]<<8) + buffer[3]; |
|
return sysfs_emit(sysfsbuf, "%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 sysfs_emit(sysfsbuf, "%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 sysfs_emit(sysfsbuf, "%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 sysfs_emit(sysfsbuf, "%s\n", entry->key); |
|
} |
|
|
|
static ssize_t applesmc_key_at_index_show(struct device *dev, |
|
struct device_attribute *attr, char *sysfsbuf) |
|
{ |
|
return sysfs_emit(sysfsbuf, "%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) |
|
{ |
|
int ret; |
|
|
|
if (!smcreg.has_accelerometer) |
|
return 0; |
|
|
|
ret = applesmc_create_nodes(accelerometer_group, 1); |
|
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 device */ |
|
applesmc_idev->name = "applesmc"; |
|
applesmc_idev->id.bustype = BUS_HOST; |
|
applesmc_idev->dev.parent = &pdev->dev; |
|
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_setup_polling(applesmc_idev, applesmc_idev_poll); |
|
if (ret) |
|
goto out_idev; |
|
|
|
input_set_poll_interval(applesmc_idev, APPLESMC_POLL_INTERVAL); |
|
|
|
ret = input_register_device(applesmc_idev); |
|
if (ret) |
|
goto out_idev; |
|
|
|
return 0; |
|
|
|
out_idev: |
|
input_free_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_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") }, |
|
}, |
|
{ applesmc_dmi_match, "Apple Xserve", { |
|
DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
|
DMI_MATCH(DMI_PRODUCT_NAME, "Xserve") }, |
|
}, |
|
{ .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);
|
|
|