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fff2d0f701
Building this driver with "clang -O3" produces a link error after the compiler partially unrolls the loop and 256ms becomes a compile-time constant that triggers the check in udelay(): ld.lld: error: undefined symbol: __bad_udelay >>> referenced by applesmc.c >>> hwmon/applesmc.o:(read_smc) in archive drivers/built-in.a I can see no reason against using a sleeping function here, as no part of the driver runs in atomic context, so instead use usleep_range() with a wide range and use jiffies for the end condition. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20200527135207.1118624-1-arnd@arndb.de Signed-off-by: Guenter Roeck <linux@roeck-us.net>
1381 lines
32 KiB
C
1381 lines
32 KiB
C
// 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 <nicolas@boichat.ch>
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* Copyright (C) 2010 Henrik Rydberg <rydberg@euromail.se>
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*
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* Based on hdaps.c driver:
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* Copyright (C) 2005 Robert Love <rml@novell.com>
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* Copyright (C) 2005 Jesper Juhl <jj@chaosbits.net>
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*
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* Fan control based on smcFanControl:
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* Copyright (C) 2006 Hendrik Holtmann <holtmann@mac.com>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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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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/* 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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#define APPLESMC_NR_PORTS 32 /* 0x300-0x31f */
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#define APPLESMC_MAX_DATA_LENGTH 32
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/* wait up to 128 ms for a status change. */
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#define APPLESMC_MIN_WAIT 0x0010
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#define APPLESMC_RETRY_WAIT 0x0100
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#define APPLESMC_MAX_WAIT 0x20000
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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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#define KEY_COUNT_KEY "#KEY" /* r-o ui32 */
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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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#define CLAMSHELL_KEY "MSLD" /* r-o ui8 (unused) */
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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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#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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#define TEMP_SENSOR_TYPE "sp78"
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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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#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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#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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#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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/* 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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/* 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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/* 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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/* 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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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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static struct device *hwmon_dev;
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static struct input_dev *applesmc_idev;
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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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static struct workqueue_struct *applesmc_led_wq;
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/*
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* wait_read - Wait for a byte to appear on SMC port. Callers must
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* hold applesmc_lock.
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*/
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static int wait_read(void)
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{
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unsigned long end = jiffies + (APPLESMC_MAX_WAIT * HZ) / USEC_PER_SEC;
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u8 status;
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int us;
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for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
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usleep_range(us, us * 16);
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status = inb(APPLESMC_CMD_PORT);
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/* read: wait for smc to settle */
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if (status & 0x01)
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return 0;
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/* timeout: give up */
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if (time_after(jiffies, end))
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break;
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}
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pr_warn("wait_read() fail: 0x%02x\n", status);
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return -EIO;
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}
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/*
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* send_byte - Write to SMC port, retrying when necessary. Callers
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* 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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u8 status;
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int us;
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unsigned long end = jiffies + (APPLESMC_MAX_WAIT * HZ) / USEC_PER_SEC;
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outb(cmd, port);
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for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) {
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usleep_range(us, us * 16);
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status = inb(APPLESMC_CMD_PORT);
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/* write: wait for smc to settle */
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if (status & 0x02)
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continue;
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/* ready: cmd accepted, return */
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if (status & 0x04)
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return 0;
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/* timeout: give up */
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if (time_after(jiffies, end))
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break;
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/* busy: long wait and resend */
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udelay(APPLESMC_RETRY_WAIT);
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outb(cmd, port);
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}
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pr_warn("send_byte(0x%02x, 0x%04x) fail: 0x%02x\n", cmd, port, status);
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return -EIO;
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}
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static int send_command(u8 cmd)
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{
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return send_byte(cmd, APPLESMC_CMD_PORT);
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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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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_read()) {
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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 & 0x01))
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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 0;
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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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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 0;
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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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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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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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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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*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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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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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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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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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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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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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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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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*value = !IS_ERR(entry);
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return 0;
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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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ret = applesmc_read_key(key, buffer, 2);
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if (ret)
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return ret;
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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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* 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");
|
|
}
|
|
|
|
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_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 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)
|
|
{
|
|
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") },
|
|
},
|
|
{ .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);
|