Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame] | 1 | /* |
| 2 | * drivers/hwmon/applesmc.c - driver for Apple's SMC (accelerometer, temperature |
| 3 | * sensors, fan control, keyboard backlight control) used in Intel-based Apple |
| 4 | * computers. |
| 5 | * |
| 6 | * Copyright (C) 2007 Nicolas Boichat <nicolas@boichat.ch> |
| 7 | * Copyright (C) 2010 Henrik Rydberg <rydberg@euromail.se> |
| 8 | * |
| 9 | * Based on hdaps.c driver: |
| 10 | * Copyright (C) 2005 Robert Love <rml@novell.com> |
| 11 | * Copyright (C) 2005 Jesper Juhl <jj@chaosbits.net> |
| 12 | * |
| 13 | * Fan control based on smcFanControl: |
| 14 | * Copyright (C) 2006 Hendrik Holtmann <holtmann@mac.com> |
| 15 | * |
| 16 | * This program is free software; you can redistribute it and/or modify it |
| 17 | * under the terms of the GNU General Public License v2 as published by the |
| 18 | * Free Software Foundation. |
| 19 | * |
| 20 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 21 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 23 | * more details. |
| 24 | * |
| 25 | * You should have received a copy of the GNU General Public License along with |
| 26 | * this program; if not, write to the Free Software Foundation, Inc., |
| 27 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA |
| 28 | */ |
| 29 | |
| 30 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 31 | |
| 32 | #include <linux/delay.h> |
| 33 | #include <linux/platform_device.h> |
| 34 | #include <linux/input-polldev.h> |
| 35 | #include <linux/kernel.h> |
| 36 | #include <linux/slab.h> |
| 37 | #include <linux/module.h> |
| 38 | #include <linux/timer.h> |
| 39 | #include <linux/dmi.h> |
| 40 | #include <linux/mutex.h> |
| 41 | #include <linux/hwmon-sysfs.h> |
| 42 | #include <linux/io.h> |
| 43 | #include <linux/leds.h> |
| 44 | #include <linux/hwmon.h> |
| 45 | #include <linux/workqueue.h> |
| 46 | #include <linux/err.h> |
| 47 | |
| 48 | /* data port used by Apple SMC */ |
| 49 | #define APPLESMC_DATA_PORT 0x300 |
| 50 | /* command/status port used by Apple SMC */ |
| 51 | #define APPLESMC_CMD_PORT 0x304 |
| 52 | |
| 53 | #define APPLESMC_NR_PORTS 32 /* 0x300-0x31f */ |
| 54 | |
| 55 | #define APPLESMC_MAX_DATA_LENGTH 32 |
| 56 | |
| 57 | /* wait up to 128 ms for a status change. */ |
| 58 | #define APPLESMC_MIN_WAIT 0x0010 |
| 59 | #define APPLESMC_RETRY_WAIT 0x0100 |
| 60 | #define APPLESMC_MAX_WAIT 0x20000 |
| 61 | |
| 62 | #define APPLESMC_READ_CMD 0x10 |
| 63 | #define APPLESMC_WRITE_CMD 0x11 |
| 64 | #define APPLESMC_GET_KEY_BY_INDEX_CMD 0x12 |
| 65 | #define APPLESMC_GET_KEY_TYPE_CMD 0x13 |
| 66 | |
| 67 | #define KEY_COUNT_KEY "#KEY" /* r-o ui32 */ |
| 68 | |
| 69 | #define LIGHT_SENSOR_LEFT_KEY "ALV0" /* r-o {alv (6-10 bytes) */ |
| 70 | #define LIGHT_SENSOR_RIGHT_KEY "ALV1" /* r-o {alv (6-10 bytes) */ |
| 71 | #define BACKLIGHT_KEY "LKSB" /* w-o {lkb (2 bytes) */ |
| 72 | |
| 73 | #define CLAMSHELL_KEY "MSLD" /* r-o ui8 (unused) */ |
| 74 | |
| 75 | #define MOTION_SENSOR_X_KEY "MO_X" /* r-o sp78 (2 bytes) */ |
| 76 | #define MOTION_SENSOR_Y_KEY "MO_Y" /* r-o sp78 (2 bytes) */ |
| 77 | #define MOTION_SENSOR_Z_KEY "MO_Z" /* r-o sp78 (2 bytes) */ |
| 78 | #define MOTION_SENSOR_KEY "MOCN" /* r/w ui16 */ |
| 79 | |
| 80 | #define FANS_COUNT "FNum" /* r-o ui8 */ |
| 81 | #define FANS_MANUAL "FS! " /* r-w ui16 */ |
| 82 | #define FAN_ID_FMT "F%dID" /* r-o char[16] */ |
| 83 | |
| 84 | #define TEMP_SENSOR_TYPE "sp78" |
| 85 | |
| 86 | /* List of keys used to read/write fan speeds */ |
| 87 | static const char *const fan_speed_fmt[] = { |
| 88 | "F%dAc", /* actual speed */ |
| 89 | "F%dMn", /* minimum speed (rw) */ |
| 90 | "F%dMx", /* maximum speed */ |
| 91 | "F%dSf", /* safe speed - not all models */ |
| 92 | "F%dTg", /* target speed (manual: rw) */ |
| 93 | }; |
| 94 | |
| 95 | #define INIT_TIMEOUT_MSECS 5000 /* wait up to 5s for device init ... */ |
| 96 | #define INIT_WAIT_MSECS 50 /* ... in 50ms increments */ |
| 97 | |
| 98 | #define APPLESMC_POLL_INTERVAL 50 /* msecs */ |
| 99 | #define APPLESMC_INPUT_FUZZ 4 /* input event threshold */ |
| 100 | #define APPLESMC_INPUT_FLAT 4 |
| 101 | |
| 102 | #define to_index(attr) (to_sensor_dev_attr(attr)->index & 0xffff) |
| 103 | #define to_option(attr) (to_sensor_dev_attr(attr)->index >> 16) |
| 104 | |
| 105 | /* Dynamic device node attributes */ |
| 106 | struct applesmc_dev_attr { |
| 107 | struct sensor_device_attribute sda; /* hwmon attributes */ |
| 108 | char name[32]; /* room for node file name */ |
| 109 | }; |
| 110 | |
| 111 | /* Dynamic device node group */ |
| 112 | struct applesmc_node_group { |
| 113 | char *format; /* format string */ |
| 114 | void *show; /* show function */ |
| 115 | void *store; /* store function */ |
| 116 | int option; /* function argument */ |
| 117 | struct applesmc_dev_attr *nodes; /* dynamic node array */ |
| 118 | }; |
| 119 | |
| 120 | /* AppleSMC entry - cached register information */ |
| 121 | struct applesmc_entry { |
| 122 | char key[5]; /* four-letter key code */ |
| 123 | u8 valid; /* set when entry is successfully read once */ |
| 124 | u8 len; /* bounded by APPLESMC_MAX_DATA_LENGTH */ |
| 125 | char type[5]; /* four-letter type code */ |
| 126 | u8 flags; /* 0x10: func; 0x40: write; 0x80: read */ |
| 127 | }; |
| 128 | |
| 129 | /* Register lookup and registers common to all SMCs */ |
| 130 | static struct applesmc_registers { |
| 131 | struct mutex mutex; /* register read/write mutex */ |
| 132 | unsigned int key_count; /* number of SMC registers */ |
| 133 | unsigned int fan_count; /* number of fans */ |
| 134 | unsigned int temp_count; /* number of temperature registers */ |
| 135 | unsigned int temp_begin; /* temperature lower index bound */ |
| 136 | unsigned int temp_end; /* temperature upper index bound */ |
| 137 | unsigned int index_count; /* size of temperature index array */ |
| 138 | int num_light_sensors; /* number of light sensors */ |
| 139 | bool has_accelerometer; /* has motion sensor */ |
| 140 | bool has_key_backlight; /* has keyboard backlight */ |
| 141 | bool init_complete; /* true when fully initialized */ |
| 142 | struct applesmc_entry *cache; /* cached key entries */ |
| 143 | const char **index; /* temperature key index */ |
| 144 | } smcreg = { |
| 145 | .mutex = __MUTEX_INITIALIZER(smcreg.mutex), |
| 146 | }; |
| 147 | |
| 148 | static const int debug; |
| 149 | static struct platform_device *pdev; |
| 150 | static s16 rest_x; |
| 151 | static s16 rest_y; |
| 152 | static u8 backlight_state[2]; |
| 153 | |
| 154 | static struct device *hwmon_dev; |
| 155 | static struct input_polled_dev *applesmc_idev; |
| 156 | |
| 157 | /* |
| 158 | * Last index written to key_at_index sysfs file, and value to use for all other |
| 159 | * key_at_index_* sysfs files. |
| 160 | */ |
| 161 | static unsigned int key_at_index; |
| 162 | |
| 163 | static struct workqueue_struct *applesmc_led_wq; |
| 164 | |
| 165 | /* |
| 166 | * wait_read - Wait for a byte to appear on SMC port. Callers must |
| 167 | * hold applesmc_lock. |
| 168 | */ |
| 169 | static int wait_read(void) |
| 170 | { |
| 171 | u8 status; |
| 172 | int us; |
| 173 | for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) { |
| 174 | udelay(us); |
| 175 | status = inb(APPLESMC_CMD_PORT); |
| 176 | /* read: wait for smc to settle */ |
| 177 | if (status & 0x01) |
| 178 | return 0; |
| 179 | } |
| 180 | |
| 181 | pr_warn("wait_read() fail: 0x%02x\n", status); |
| 182 | return -EIO; |
| 183 | } |
| 184 | |
| 185 | /* |
| 186 | * send_byte - Write to SMC port, retrying when necessary. Callers |
| 187 | * must hold applesmc_lock. |
| 188 | */ |
| 189 | static int send_byte(u8 cmd, u16 port) |
| 190 | { |
| 191 | u8 status; |
| 192 | int us; |
| 193 | |
| 194 | outb(cmd, port); |
| 195 | for (us = APPLESMC_MIN_WAIT; us < APPLESMC_MAX_WAIT; us <<= 1) { |
| 196 | udelay(us); |
| 197 | status = inb(APPLESMC_CMD_PORT); |
| 198 | /* write: wait for smc to settle */ |
| 199 | if (status & 0x02) |
| 200 | continue; |
| 201 | /* ready: cmd accepted, return */ |
| 202 | if (status & 0x04) |
| 203 | return 0; |
| 204 | /* timeout: give up */ |
| 205 | if (us << 1 == APPLESMC_MAX_WAIT) |
| 206 | break; |
| 207 | /* busy: long wait and resend */ |
| 208 | udelay(APPLESMC_RETRY_WAIT); |
| 209 | outb(cmd, port); |
| 210 | } |
| 211 | |
| 212 | pr_warn("send_byte(0x%02x, 0x%04x) fail: 0x%02x\n", cmd, port, status); |
| 213 | return -EIO; |
| 214 | } |
| 215 | |
| 216 | static int send_command(u8 cmd) |
| 217 | { |
| 218 | return send_byte(cmd, APPLESMC_CMD_PORT); |
| 219 | } |
| 220 | |
| 221 | static int send_argument(const char *key) |
| 222 | { |
| 223 | int i; |
| 224 | |
| 225 | for (i = 0; i < 4; i++) |
| 226 | if (send_byte(key[i], APPLESMC_DATA_PORT)) |
| 227 | return -EIO; |
| 228 | return 0; |
| 229 | } |
| 230 | |
| 231 | static int read_smc(u8 cmd, const char *key, u8 *buffer, u8 len) |
| 232 | { |
| 233 | u8 status, data = 0; |
| 234 | int i; |
| 235 | |
| 236 | if (send_command(cmd) || send_argument(key)) { |
| 237 | pr_warn("%.4s: read arg fail\n", key); |
| 238 | return -EIO; |
| 239 | } |
| 240 | |
| 241 | /* This has no effect on newer (2012) SMCs */ |
| 242 | if (send_byte(len, APPLESMC_DATA_PORT)) { |
| 243 | pr_warn("%.4s: read len fail\n", key); |
| 244 | return -EIO; |
| 245 | } |
| 246 | |
| 247 | for (i = 0; i < len; i++) { |
| 248 | if (wait_read()) { |
| 249 | pr_warn("%.4s: read data[%d] fail\n", key, i); |
| 250 | return -EIO; |
| 251 | } |
| 252 | buffer[i] = inb(APPLESMC_DATA_PORT); |
| 253 | } |
| 254 | |
| 255 | /* Read the data port until bit0 is cleared */ |
| 256 | for (i = 0; i < 16; i++) { |
| 257 | udelay(APPLESMC_MIN_WAIT); |
| 258 | status = inb(APPLESMC_CMD_PORT); |
| 259 | if (!(status & 0x01)) |
| 260 | break; |
| 261 | data = inb(APPLESMC_DATA_PORT); |
| 262 | } |
| 263 | if (i) |
| 264 | pr_warn("flushed %d bytes, last value is: %d\n", i, data); |
| 265 | |
| 266 | return 0; |
| 267 | } |
| 268 | |
| 269 | static int write_smc(u8 cmd, const char *key, const u8 *buffer, u8 len) |
| 270 | { |
| 271 | int i; |
| 272 | |
| 273 | if (send_command(cmd) || send_argument(key)) { |
| 274 | pr_warn("%s: write arg fail\n", key); |
| 275 | return -EIO; |
| 276 | } |
| 277 | |
| 278 | if (send_byte(len, APPLESMC_DATA_PORT)) { |
| 279 | pr_warn("%.4s: write len fail\n", key); |
| 280 | return -EIO; |
| 281 | } |
| 282 | |
| 283 | for (i = 0; i < len; i++) { |
| 284 | if (send_byte(buffer[i], APPLESMC_DATA_PORT)) { |
| 285 | pr_warn("%s: write data fail\n", key); |
| 286 | return -EIO; |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | return 0; |
| 291 | } |
| 292 | |
| 293 | static int read_register_count(unsigned int *count) |
| 294 | { |
| 295 | __be32 be; |
| 296 | int ret; |
| 297 | |
| 298 | ret = read_smc(APPLESMC_READ_CMD, KEY_COUNT_KEY, (u8 *)&be, 4); |
| 299 | if (ret) |
| 300 | return ret; |
| 301 | |
| 302 | *count = be32_to_cpu(be); |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | /* |
| 307 | * Serialized I/O |
| 308 | * |
| 309 | * Returns zero on success or a negative error on failure. |
| 310 | * All functions below are concurrency safe - callers should NOT hold lock. |
| 311 | */ |
| 312 | |
| 313 | static int applesmc_read_entry(const struct applesmc_entry *entry, |
| 314 | u8 *buf, u8 len) |
| 315 | { |
| 316 | int ret; |
| 317 | |
| 318 | if (entry->len != len) |
| 319 | return -EINVAL; |
| 320 | mutex_lock(&smcreg.mutex); |
| 321 | ret = read_smc(APPLESMC_READ_CMD, entry->key, buf, len); |
| 322 | mutex_unlock(&smcreg.mutex); |
| 323 | |
| 324 | return ret; |
| 325 | } |
| 326 | |
| 327 | static int applesmc_write_entry(const struct applesmc_entry *entry, |
| 328 | const u8 *buf, u8 len) |
| 329 | { |
| 330 | int ret; |
| 331 | |
| 332 | if (entry->len != len) |
| 333 | return -EINVAL; |
| 334 | mutex_lock(&smcreg.mutex); |
| 335 | ret = write_smc(APPLESMC_WRITE_CMD, entry->key, buf, len); |
| 336 | mutex_unlock(&smcreg.mutex); |
| 337 | return ret; |
| 338 | } |
| 339 | |
| 340 | static const struct applesmc_entry *applesmc_get_entry_by_index(int index) |
| 341 | { |
| 342 | struct applesmc_entry *cache = &smcreg.cache[index]; |
| 343 | u8 key[4], info[6]; |
| 344 | __be32 be; |
| 345 | int ret = 0; |
| 346 | |
| 347 | if (cache->valid) |
| 348 | return cache; |
| 349 | |
| 350 | mutex_lock(&smcreg.mutex); |
| 351 | |
| 352 | if (cache->valid) |
| 353 | goto out; |
| 354 | be = cpu_to_be32(index); |
| 355 | ret = read_smc(APPLESMC_GET_KEY_BY_INDEX_CMD, (u8 *)&be, key, 4); |
| 356 | if (ret) |
| 357 | goto out; |
| 358 | ret = read_smc(APPLESMC_GET_KEY_TYPE_CMD, key, info, 6); |
| 359 | if (ret) |
| 360 | goto out; |
| 361 | |
| 362 | memcpy(cache->key, key, 4); |
| 363 | cache->len = info[0]; |
| 364 | memcpy(cache->type, &info[1], 4); |
| 365 | cache->flags = info[5]; |
| 366 | cache->valid = 1; |
| 367 | |
| 368 | out: |
| 369 | mutex_unlock(&smcreg.mutex); |
| 370 | if (ret) |
| 371 | return ERR_PTR(ret); |
| 372 | return cache; |
| 373 | } |
| 374 | |
| 375 | static int applesmc_get_lower_bound(unsigned int *lo, const char *key) |
| 376 | { |
| 377 | int begin = 0, end = smcreg.key_count; |
| 378 | const struct applesmc_entry *entry; |
| 379 | |
| 380 | while (begin != end) { |
| 381 | int middle = begin + (end - begin) / 2; |
| 382 | entry = applesmc_get_entry_by_index(middle); |
| 383 | if (IS_ERR(entry)) { |
| 384 | *lo = 0; |
| 385 | return PTR_ERR(entry); |
| 386 | } |
| 387 | if (strcmp(entry->key, key) < 0) |
| 388 | begin = middle + 1; |
| 389 | else |
| 390 | end = middle; |
| 391 | } |
| 392 | |
| 393 | *lo = begin; |
| 394 | return 0; |
| 395 | } |
| 396 | |
| 397 | static int applesmc_get_upper_bound(unsigned int *hi, const char *key) |
| 398 | { |
| 399 | int begin = 0, end = smcreg.key_count; |
| 400 | const struct applesmc_entry *entry; |
| 401 | |
| 402 | while (begin != end) { |
| 403 | int middle = begin + (end - begin) / 2; |
| 404 | entry = applesmc_get_entry_by_index(middle); |
| 405 | if (IS_ERR(entry)) { |
| 406 | *hi = smcreg.key_count; |
| 407 | return PTR_ERR(entry); |
| 408 | } |
| 409 | if (strcmp(key, entry->key) < 0) |
| 410 | end = middle; |
| 411 | else |
| 412 | begin = middle + 1; |
| 413 | } |
| 414 | |
| 415 | *hi = begin; |
| 416 | return 0; |
| 417 | } |
| 418 | |
| 419 | static const struct applesmc_entry *applesmc_get_entry_by_key(const char *key) |
| 420 | { |
| 421 | int begin, end; |
| 422 | int ret; |
| 423 | |
| 424 | ret = applesmc_get_lower_bound(&begin, key); |
| 425 | if (ret) |
| 426 | return ERR_PTR(ret); |
| 427 | ret = applesmc_get_upper_bound(&end, key); |
| 428 | if (ret) |
| 429 | return ERR_PTR(ret); |
| 430 | if (end - begin != 1) |
| 431 | return ERR_PTR(-EINVAL); |
| 432 | |
| 433 | return applesmc_get_entry_by_index(begin); |
| 434 | } |
| 435 | |
| 436 | static int applesmc_read_key(const char *key, u8 *buffer, u8 len) |
| 437 | { |
| 438 | const struct applesmc_entry *entry; |
| 439 | |
| 440 | entry = applesmc_get_entry_by_key(key); |
| 441 | if (IS_ERR(entry)) |
| 442 | return PTR_ERR(entry); |
| 443 | |
| 444 | return applesmc_read_entry(entry, buffer, len); |
| 445 | } |
| 446 | |
| 447 | static int applesmc_write_key(const char *key, const u8 *buffer, u8 len) |
| 448 | { |
| 449 | const struct applesmc_entry *entry; |
| 450 | |
| 451 | entry = applesmc_get_entry_by_key(key); |
| 452 | if (IS_ERR(entry)) |
| 453 | return PTR_ERR(entry); |
| 454 | |
| 455 | return applesmc_write_entry(entry, buffer, len); |
| 456 | } |
| 457 | |
| 458 | static int applesmc_has_key(const char *key, bool *value) |
| 459 | { |
| 460 | const struct applesmc_entry *entry; |
| 461 | |
| 462 | entry = applesmc_get_entry_by_key(key); |
| 463 | if (IS_ERR(entry) && PTR_ERR(entry) != -EINVAL) |
| 464 | return PTR_ERR(entry); |
| 465 | |
| 466 | *value = !IS_ERR(entry); |
| 467 | return 0; |
| 468 | } |
| 469 | |
| 470 | /* |
| 471 | * applesmc_read_s16 - Read 16-bit signed big endian register |
| 472 | */ |
| 473 | static int applesmc_read_s16(const char *key, s16 *value) |
| 474 | { |
| 475 | u8 buffer[2]; |
| 476 | int ret; |
| 477 | |
| 478 | ret = applesmc_read_key(key, buffer, 2); |
| 479 | if (ret) |
| 480 | return ret; |
| 481 | |
| 482 | *value = ((s16)buffer[0] << 8) | buffer[1]; |
| 483 | return 0; |
| 484 | } |
| 485 | |
| 486 | /* |
| 487 | * applesmc_device_init - initialize the accelerometer. Can sleep. |
| 488 | */ |
| 489 | static void applesmc_device_init(void) |
| 490 | { |
| 491 | int total; |
| 492 | u8 buffer[2]; |
| 493 | |
| 494 | if (!smcreg.has_accelerometer) |
| 495 | return; |
| 496 | |
| 497 | for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) { |
| 498 | if (!applesmc_read_key(MOTION_SENSOR_KEY, buffer, 2) && |
| 499 | (buffer[0] != 0x00 || buffer[1] != 0x00)) |
| 500 | return; |
| 501 | buffer[0] = 0xe0; |
| 502 | buffer[1] = 0x00; |
| 503 | applesmc_write_key(MOTION_SENSOR_KEY, buffer, 2); |
| 504 | msleep(INIT_WAIT_MSECS); |
| 505 | } |
| 506 | |
| 507 | pr_warn("failed to init the device\n"); |
| 508 | } |
| 509 | |
| 510 | static int applesmc_init_index(struct applesmc_registers *s) |
| 511 | { |
| 512 | const struct applesmc_entry *entry; |
| 513 | unsigned int i; |
| 514 | |
| 515 | if (s->index) |
| 516 | return 0; |
| 517 | |
| 518 | s->index = kcalloc(s->temp_count, sizeof(s->index[0]), GFP_KERNEL); |
| 519 | if (!s->index) |
| 520 | return -ENOMEM; |
| 521 | |
| 522 | for (i = s->temp_begin; i < s->temp_end; i++) { |
| 523 | entry = applesmc_get_entry_by_index(i); |
| 524 | if (IS_ERR(entry)) |
| 525 | continue; |
| 526 | if (strcmp(entry->type, TEMP_SENSOR_TYPE)) |
| 527 | continue; |
| 528 | s->index[s->index_count++] = entry->key; |
| 529 | } |
| 530 | |
| 531 | return 0; |
| 532 | } |
| 533 | |
| 534 | /* |
| 535 | * applesmc_init_smcreg_try - Try to initialize register cache. Idempotent. |
| 536 | */ |
| 537 | static int applesmc_init_smcreg_try(void) |
| 538 | { |
| 539 | struct applesmc_registers *s = &smcreg; |
| 540 | bool left_light_sensor = 0, right_light_sensor = 0; |
| 541 | unsigned int count; |
| 542 | u8 tmp[1]; |
| 543 | int ret; |
| 544 | |
| 545 | if (s->init_complete) |
| 546 | return 0; |
| 547 | |
| 548 | ret = read_register_count(&count); |
| 549 | if (ret) |
| 550 | return ret; |
| 551 | |
| 552 | if (s->cache && s->key_count != count) { |
| 553 | pr_warn("key count changed from %d to %d\n", |
| 554 | s->key_count, count); |
| 555 | kfree(s->cache); |
| 556 | s->cache = NULL; |
| 557 | } |
| 558 | s->key_count = count; |
| 559 | |
| 560 | if (!s->cache) |
| 561 | s->cache = kcalloc(s->key_count, sizeof(*s->cache), GFP_KERNEL); |
| 562 | if (!s->cache) |
| 563 | return -ENOMEM; |
| 564 | |
| 565 | ret = applesmc_read_key(FANS_COUNT, tmp, 1); |
| 566 | if (ret) |
| 567 | return ret; |
| 568 | s->fan_count = tmp[0]; |
| 569 | |
| 570 | ret = applesmc_get_lower_bound(&s->temp_begin, "T"); |
| 571 | if (ret) |
| 572 | return ret; |
| 573 | ret = applesmc_get_lower_bound(&s->temp_end, "U"); |
| 574 | if (ret) |
| 575 | return ret; |
| 576 | s->temp_count = s->temp_end - s->temp_begin; |
| 577 | |
| 578 | ret = applesmc_init_index(s); |
| 579 | if (ret) |
| 580 | return ret; |
| 581 | |
| 582 | ret = applesmc_has_key(LIGHT_SENSOR_LEFT_KEY, &left_light_sensor); |
| 583 | if (ret) |
| 584 | return ret; |
| 585 | ret = applesmc_has_key(LIGHT_SENSOR_RIGHT_KEY, &right_light_sensor); |
| 586 | if (ret) |
| 587 | return ret; |
| 588 | ret = applesmc_has_key(MOTION_SENSOR_KEY, &s->has_accelerometer); |
| 589 | if (ret) |
| 590 | return ret; |
| 591 | ret = applesmc_has_key(BACKLIGHT_KEY, &s->has_key_backlight); |
| 592 | if (ret) |
| 593 | return ret; |
| 594 | |
| 595 | s->num_light_sensors = left_light_sensor + right_light_sensor; |
| 596 | s->init_complete = true; |
| 597 | |
| 598 | pr_info("key=%d fan=%d temp=%d index=%d acc=%d lux=%d kbd=%d\n", |
| 599 | s->key_count, s->fan_count, s->temp_count, s->index_count, |
| 600 | s->has_accelerometer, |
| 601 | s->num_light_sensors, |
| 602 | s->has_key_backlight); |
| 603 | |
| 604 | return 0; |
| 605 | } |
| 606 | |
| 607 | static void applesmc_destroy_smcreg(void) |
| 608 | { |
| 609 | kfree(smcreg.index); |
| 610 | smcreg.index = NULL; |
| 611 | kfree(smcreg.cache); |
| 612 | smcreg.cache = NULL; |
| 613 | smcreg.init_complete = false; |
| 614 | } |
| 615 | |
| 616 | /* |
| 617 | * applesmc_init_smcreg - Initialize register cache. |
| 618 | * |
| 619 | * Retries until initialization is successful, or the operation times out. |
| 620 | * |
| 621 | */ |
| 622 | static int applesmc_init_smcreg(void) |
| 623 | { |
| 624 | int ms, ret; |
| 625 | |
| 626 | for (ms = 0; ms < INIT_TIMEOUT_MSECS; ms += INIT_WAIT_MSECS) { |
| 627 | ret = applesmc_init_smcreg_try(); |
| 628 | if (!ret) { |
| 629 | if (ms) |
| 630 | pr_info("init_smcreg() took %d ms\n", ms); |
| 631 | return 0; |
| 632 | } |
| 633 | msleep(INIT_WAIT_MSECS); |
| 634 | } |
| 635 | |
| 636 | applesmc_destroy_smcreg(); |
| 637 | |
| 638 | return ret; |
| 639 | } |
| 640 | |
| 641 | /* Device model stuff */ |
| 642 | static int applesmc_probe(struct platform_device *dev) |
| 643 | { |
| 644 | int ret; |
| 645 | |
| 646 | ret = applesmc_init_smcreg(); |
| 647 | if (ret) |
| 648 | return ret; |
| 649 | |
| 650 | applesmc_device_init(); |
| 651 | |
| 652 | return 0; |
| 653 | } |
| 654 | |
| 655 | /* Synchronize device with memorized backlight state */ |
| 656 | static int applesmc_pm_resume(struct device *dev) |
| 657 | { |
| 658 | if (smcreg.has_key_backlight) |
| 659 | applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2); |
| 660 | return 0; |
| 661 | } |
| 662 | |
| 663 | /* Reinitialize device on resume from hibernation */ |
| 664 | static int applesmc_pm_restore(struct device *dev) |
| 665 | { |
| 666 | applesmc_device_init(); |
| 667 | return applesmc_pm_resume(dev); |
| 668 | } |
| 669 | |
| 670 | static const struct dev_pm_ops applesmc_pm_ops = { |
| 671 | .resume = applesmc_pm_resume, |
| 672 | .restore = applesmc_pm_restore, |
| 673 | }; |
| 674 | |
| 675 | static struct platform_driver applesmc_driver = { |
| 676 | .probe = applesmc_probe, |
| 677 | .driver = { |
| 678 | .name = "applesmc", |
| 679 | .pm = &applesmc_pm_ops, |
| 680 | }, |
| 681 | }; |
| 682 | |
| 683 | /* |
| 684 | * applesmc_calibrate - Set our "resting" values. Callers must |
| 685 | * hold applesmc_lock. |
| 686 | */ |
| 687 | static void applesmc_calibrate(void) |
| 688 | { |
| 689 | applesmc_read_s16(MOTION_SENSOR_X_KEY, &rest_x); |
| 690 | applesmc_read_s16(MOTION_SENSOR_Y_KEY, &rest_y); |
| 691 | rest_x = -rest_x; |
| 692 | } |
| 693 | |
| 694 | static void applesmc_idev_poll(struct input_polled_dev *dev) |
| 695 | { |
| 696 | struct input_dev *idev = dev->input; |
| 697 | s16 x, y; |
| 698 | |
| 699 | if (applesmc_read_s16(MOTION_SENSOR_X_KEY, &x)) |
| 700 | return; |
| 701 | if (applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y)) |
| 702 | return; |
| 703 | |
| 704 | x = -x; |
| 705 | input_report_abs(idev, ABS_X, x - rest_x); |
| 706 | input_report_abs(idev, ABS_Y, y - rest_y); |
| 707 | input_sync(idev); |
| 708 | } |
| 709 | |
| 710 | /* Sysfs Files */ |
| 711 | |
| 712 | static ssize_t applesmc_name_show(struct device *dev, |
| 713 | struct device_attribute *attr, char *buf) |
| 714 | { |
| 715 | return snprintf(buf, PAGE_SIZE, "applesmc\n"); |
| 716 | } |
| 717 | |
| 718 | static ssize_t applesmc_position_show(struct device *dev, |
| 719 | struct device_attribute *attr, char *buf) |
| 720 | { |
| 721 | int ret; |
| 722 | s16 x, y, z; |
| 723 | |
| 724 | ret = applesmc_read_s16(MOTION_SENSOR_X_KEY, &x); |
| 725 | if (ret) |
| 726 | goto out; |
| 727 | ret = applesmc_read_s16(MOTION_SENSOR_Y_KEY, &y); |
| 728 | if (ret) |
| 729 | goto out; |
| 730 | ret = applesmc_read_s16(MOTION_SENSOR_Z_KEY, &z); |
| 731 | if (ret) |
| 732 | goto out; |
| 733 | |
| 734 | out: |
| 735 | if (ret) |
| 736 | return ret; |
| 737 | else |
| 738 | return snprintf(buf, PAGE_SIZE, "(%d,%d,%d)\n", x, y, z); |
| 739 | } |
| 740 | |
| 741 | static ssize_t applesmc_light_show(struct device *dev, |
| 742 | struct device_attribute *attr, char *sysfsbuf) |
| 743 | { |
| 744 | const struct applesmc_entry *entry; |
| 745 | static int data_length; |
| 746 | int ret; |
| 747 | u8 left = 0, right = 0; |
| 748 | u8 buffer[10]; |
| 749 | |
| 750 | if (!data_length) { |
| 751 | entry = applesmc_get_entry_by_key(LIGHT_SENSOR_LEFT_KEY); |
| 752 | if (IS_ERR(entry)) |
| 753 | return PTR_ERR(entry); |
| 754 | if (entry->len > 10) |
| 755 | return -ENXIO; |
| 756 | data_length = entry->len; |
| 757 | pr_info("light sensor data length set to %d\n", data_length); |
| 758 | } |
| 759 | |
| 760 | ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length); |
| 761 | /* newer macbooks report a single 10-bit bigendian value */ |
| 762 | if (data_length == 10) { |
| 763 | left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2; |
| 764 | goto out; |
| 765 | } |
| 766 | left = buffer[2]; |
| 767 | if (ret) |
| 768 | goto out; |
| 769 | ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length); |
| 770 | right = buffer[2]; |
| 771 | |
| 772 | out: |
| 773 | if (ret) |
| 774 | return ret; |
| 775 | else |
| 776 | return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", left, right); |
| 777 | } |
| 778 | |
| 779 | /* Displays sensor key as label */ |
| 780 | static ssize_t applesmc_show_sensor_label(struct device *dev, |
| 781 | struct device_attribute *devattr, char *sysfsbuf) |
| 782 | { |
| 783 | const char *key = smcreg.index[to_index(devattr)]; |
| 784 | |
| 785 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", key); |
| 786 | } |
| 787 | |
| 788 | /* Displays degree Celsius * 1000 */ |
| 789 | static ssize_t applesmc_show_temperature(struct device *dev, |
| 790 | struct device_attribute *devattr, char *sysfsbuf) |
| 791 | { |
| 792 | const char *key = smcreg.index[to_index(devattr)]; |
| 793 | int ret; |
| 794 | s16 value; |
| 795 | int temp; |
| 796 | |
| 797 | ret = applesmc_read_s16(key, &value); |
| 798 | if (ret) |
| 799 | return ret; |
| 800 | |
| 801 | temp = 250 * (value >> 6); |
| 802 | |
| 803 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", temp); |
| 804 | } |
| 805 | |
| 806 | static ssize_t applesmc_show_fan_speed(struct device *dev, |
| 807 | struct device_attribute *attr, char *sysfsbuf) |
| 808 | { |
| 809 | int ret; |
| 810 | unsigned int speed = 0; |
| 811 | char newkey[5]; |
| 812 | u8 buffer[2]; |
| 813 | |
| 814 | sprintf(newkey, fan_speed_fmt[to_option(attr)], to_index(attr)); |
| 815 | |
| 816 | ret = applesmc_read_key(newkey, buffer, 2); |
| 817 | speed = ((buffer[0] << 8 | buffer[1]) >> 2); |
| 818 | |
| 819 | if (ret) |
| 820 | return ret; |
| 821 | else |
| 822 | return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed); |
| 823 | } |
| 824 | |
| 825 | static ssize_t applesmc_store_fan_speed(struct device *dev, |
| 826 | struct device_attribute *attr, |
| 827 | const char *sysfsbuf, size_t count) |
| 828 | { |
| 829 | int ret; |
| 830 | unsigned long speed; |
| 831 | char newkey[5]; |
| 832 | u8 buffer[2]; |
| 833 | |
| 834 | if (kstrtoul(sysfsbuf, 10, &speed) < 0 || speed >= 0x4000) |
| 835 | return -EINVAL; /* Bigger than a 14-bit value */ |
| 836 | |
| 837 | sprintf(newkey, fan_speed_fmt[to_option(attr)], to_index(attr)); |
| 838 | |
| 839 | buffer[0] = (speed >> 6) & 0xff; |
| 840 | buffer[1] = (speed << 2) & 0xff; |
| 841 | ret = applesmc_write_key(newkey, buffer, 2); |
| 842 | |
| 843 | if (ret) |
| 844 | return ret; |
| 845 | else |
| 846 | return count; |
| 847 | } |
| 848 | |
| 849 | static ssize_t applesmc_show_fan_manual(struct device *dev, |
| 850 | struct device_attribute *attr, char *sysfsbuf) |
| 851 | { |
| 852 | int ret; |
| 853 | u16 manual = 0; |
| 854 | u8 buffer[2]; |
| 855 | |
| 856 | ret = applesmc_read_key(FANS_MANUAL, buffer, 2); |
| 857 | manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01; |
| 858 | |
| 859 | if (ret) |
| 860 | return ret; |
| 861 | else |
| 862 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual); |
| 863 | } |
| 864 | |
| 865 | static ssize_t applesmc_store_fan_manual(struct device *dev, |
| 866 | struct device_attribute *attr, |
| 867 | const char *sysfsbuf, size_t count) |
| 868 | { |
| 869 | int ret; |
| 870 | u8 buffer[2]; |
| 871 | unsigned long input; |
| 872 | u16 val; |
| 873 | |
| 874 | if (kstrtoul(sysfsbuf, 10, &input) < 0) |
| 875 | return -EINVAL; |
| 876 | |
| 877 | ret = applesmc_read_key(FANS_MANUAL, buffer, 2); |
| 878 | val = (buffer[0] << 8 | buffer[1]); |
| 879 | if (ret) |
| 880 | goto out; |
| 881 | |
| 882 | if (input) |
| 883 | val = val | (0x01 << to_index(attr)); |
| 884 | else |
| 885 | val = val & ~(0x01 << to_index(attr)); |
| 886 | |
| 887 | buffer[0] = (val >> 8) & 0xFF; |
| 888 | buffer[1] = val & 0xFF; |
| 889 | |
| 890 | ret = applesmc_write_key(FANS_MANUAL, buffer, 2); |
| 891 | |
| 892 | out: |
| 893 | if (ret) |
| 894 | return ret; |
| 895 | else |
| 896 | return count; |
| 897 | } |
| 898 | |
| 899 | static ssize_t applesmc_show_fan_position(struct device *dev, |
| 900 | struct device_attribute *attr, char *sysfsbuf) |
| 901 | { |
| 902 | int ret; |
| 903 | char newkey[5]; |
| 904 | u8 buffer[17]; |
| 905 | |
| 906 | sprintf(newkey, FAN_ID_FMT, to_index(attr)); |
| 907 | |
| 908 | ret = applesmc_read_key(newkey, buffer, 16); |
| 909 | buffer[16] = 0; |
| 910 | |
| 911 | if (ret) |
| 912 | return ret; |
| 913 | else |
| 914 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", buffer+4); |
| 915 | } |
| 916 | |
| 917 | static ssize_t applesmc_calibrate_show(struct device *dev, |
| 918 | struct device_attribute *attr, char *sysfsbuf) |
| 919 | { |
| 920 | return snprintf(sysfsbuf, PAGE_SIZE, "(%d,%d)\n", rest_x, rest_y); |
| 921 | } |
| 922 | |
| 923 | static ssize_t applesmc_calibrate_store(struct device *dev, |
| 924 | struct device_attribute *attr, const char *sysfsbuf, size_t count) |
| 925 | { |
| 926 | applesmc_calibrate(); |
| 927 | |
| 928 | return count; |
| 929 | } |
| 930 | |
| 931 | static void applesmc_backlight_set(struct work_struct *work) |
| 932 | { |
| 933 | applesmc_write_key(BACKLIGHT_KEY, backlight_state, 2); |
| 934 | } |
| 935 | static DECLARE_WORK(backlight_work, &applesmc_backlight_set); |
| 936 | |
| 937 | static void applesmc_brightness_set(struct led_classdev *led_cdev, |
| 938 | enum led_brightness value) |
| 939 | { |
| 940 | int ret; |
| 941 | |
| 942 | backlight_state[0] = value; |
| 943 | ret = queue_work(applesmc_led_wq, &backlight_work); |
| 944 | |
| 945 | if (debug && (!ret)) |
| 946 | dev_dbg(led_cdev->dev, "work was already on the queue.\n"); |
| 947 | } |
| 948 | |
| 949 | static ssize_t applesmc_key_count_show(struct device *dev, |
| 950 | struct device_attribute *attr, char *sysfsbuf) |
| 951 | { |
| 952 | int ret; |
| 953 | u8 buffer[4]; |
| 954 | u32 count; |
| 955 | |
| 956 | ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4); |
| 957 | count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) + |
| 958 | ((u32)buffer[2]<<8) + buffer[3]; |
| 959 | |
| 960 | if (ret) |
| 961 | return ret; |
| 962 | else |
| 963 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count); |
| 964 | } |
| 965 | |
| 966 | static ssize_t applesmc_key_at_index_read_show(struct device *dev, |
| 967 | struct device_attribute *attr, char *sysfsbuf) |
| 968 | { |
| 969 | const struct applesmc_entry *entry; |
| 970 | int ret; |
| 971 | |
| 972 | entry = applesmc_get_entry_by_index(key_at_index); |
| 973 | if (IS_ERR(entry)) |
| 974 | return PTR_ERR(entry); |
| 975 | ret = applesmc_read_entry(entry, sysfsbuf, entry->len); |
| 976 | if (ret) |
| 977 | return ret; |
| 978 | |
| 979 | return entry->len; |
| 980 | } |
| 981 | |
| 982 | static ssize_t applesmc_key_at_index_data_length_show(struct device *dev, |
| 983 | struct device_attribute *attr, char *sysfsbuf) |
| 984 | { |
| 985 | const struct applesmc_entry *entry; |
| 986 | |
| 987 | entry = applesmc_get_entry_by_index(key_at_index); |
| 988 | if (IS_ERR(entry)) |
| 989 | return PTR_ERR(entry); |
| 990 | |
| 991 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", entry->len); |
| 992 | } |
| 993 | |
| 994 | static ssize_t applesmc_key_at_index_type_show(struct device *dev, |
| 995 | struct device_attribute *attr, char *sysfsbuf) |
| 996 | { |
| 997 | const struct applesmc_entry *entry; |
| 998 | |
| 999 | entry = applesmc_get_entry_by_index(key_at_index); |
| 1000 | if (IS_ERR(entry)) |
| 1001 | return PTR_ERR(entry); |
| 1002 | |
| 1003 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->type); |
| 1004 | } |
| 1005 | |
| 1006 | static ssize_t applesmc_key_at_index_name_show(struct device *dev, |
| 1007 | struct device_attribute *attr, char *sysfsbuf) |
| 1008 | { |
| 1009 | const struct applesmc_entry *entry; |
| 1010 | |
| 1011 | entry = applesmc_get_entry_by_index(key_at_index); |
| 1012 | if (IS_ERR(entry)) |
| 1013 | return PTR_ERR(entry); |
| 1014 | |
| 1015 | return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", entry->key); |
| 1016 | } |
| 1017 | |
| 1018 | static ssize_t applesmc_key_at_index_show(struct device *dev, |
| 1019 | struct device_attribute *attr, char *sysfsbuf) |
| 1020 | { |
| 1021 | return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", key_at_index); |
| 1022 | } |
| 1023 | |
| 1024 | static ssize_t applesmc_key_at_index_store(struct device *dev, |
| 1025 | struct device_attribute *attr, const char *sysfsbuf, size_t count) |
| 1026 | { |
| 1027 | unsigned long newkey; |
| 1028 | |
| 1029 | if (kstrtoul(sysfsbuf, 10, &newkey) < 0 |
| 1030 | || newkey >= smcreg.key_count) |
| 1031 | return -EINVAL; |
| 1032 | |
| 1033 | key_at_index = newkey; |
| 1034 | return count; |
| 1035 | } |
| 1036 | |
| 1037 | static struct led_classdev applesmc_backlight = { |
| 1038 | .name = "smc::kbd_backlight", |
| 1039 | .default_trigger = "nand-disk", |
| 1040 | .brightness_set = applesmc_brightness_set, |
| 1041 | }; |
| 1042 | |
| 1043 | static struct applesmc_node_group info_group[] = { |
| 1044 | { "name", applesmc_name_show }, |
| 1045 | { "key_count", applesmc_key_count_show }, |
| 1046 | { "key_at_index", applesmc_key_at_index_show, applesmc_key_at_index_store }, |
| 1047 | { "key_at_index_name", applesmc_key_at_index_name_show }, |
| 1048 | { "key_at_index_type", applesmc_key_at_index_type_show }, |
| 1049 | { "key_at_index_data_length", applesmc_key_at_index_data_length_show }, |
| 1050 | { "key_at_index_data", applesmc_key_at_index_read_show }, |
| 1051 | { } |
| 1052 | }; |
| 1053 | |
| 1054 | static struct applesmc_node_group accelerometer_group[] = { |
| 1055 | { "position", applesmc_position_show }, |
| 1056 | { "calibrate", applesmc_calibrate_show, applesmc_calibrate_store }, |
| 1057 | { } |
| 1058 | }; |
| 1059 | |
| 1060 | static struct applesmc_node_group light_sensor_group[] = { |
| 1061 | { "light", applesmc_light_show }, |
| 1062 | { } |
| 1063 | }; |
| 1064 | |
| 1065 | static struct applesmc_node_group fan_group[] = { |
| 1066 | { "fan%d_label", applesmc_show_fan_position }, |
| 1067 | { "fan%d_input", applesmc_show_fan_speed, NULL, 0 }, |
| 1068 | { "fan%d_min", applesmc_show_fan_speed, applesmc_store_fan_speed, 1 }, |
| 1069 | { "fan%d_max", applesmc_show_fan_speed, NULL, 2 }, |
| 1070 | { "fan%d_safe", applesmc_show_fan_speed, NULL, 3 }, |
| 1071 | { "fan%d_output", applesmc_show_fan_speed, applesmc_store_fan_speed, 4 }, |
| 1072 | { "fan%d_manual", applesmc_show_fan_manual, applesmc_store_fan_manual }, |
| 1073 | { } |
| 1074 | }; |
| 1075 | |
| 1076 | static struct applesmc_node_group temp_group[] = { |
| 1077 | { "temp%d_label", applesmc_show_sensor_label }, |
| 1078 | { "temp%d_input", applesmc_show_temperature }, |
| 1079 | { } |
| 1080 | }; |
| 1081 | |
| 1082 | /* Module stuff */ |
| 1083 | |
| 1084 | /* |
| 1085 | * applesmc_destroy_nodes - remove files and free associated memory |
| 1086 | */ |
| 1087 | static void applesmc_destroy_nodes(struct applesmc_node_group *groups) |
| 1088 | { |
| 1089 | struct applesmc_node_group *grp; |
| 1090 | struct applesmc_dev_attr *node; |
| 1091 | |
| 1092 | for (grp = groups; grp->nodes; grp++) { |
| 1093 | for (node = grp->nodes; node->sda.dev_attr.attr.name; node++) |
| 1094 | sysfs_remove_file(&pdev->dev.kobj, |
| 1095 | &node->sda.dev_attr.attr); |
| 1096 | kfree(grp->nodes); |
| 1097 | grp->nodes = NULL; |
| 1098 | } |
| 1099 | } |
| 1100 | |
| 1101 | /* |
| 1102 | * applesmc_create_nodes - create a two-dimensional group of sysfs files |
| 1103 | */ |
| 1104 | static int applesmc_create_nodes(struct applesmc_node_group *groups, int num) |
| 1105 | { |
| 1106 | struct applesmc_node_group *grp; |
| 1107 | struct applesmc_dev_attr *node; |
| 1108 | struct attribute *attr; |
| 1109 | int ret, i; |
| 1110 | |
| 1111 | for (grp = groups; grp->format; grp++) { |
| 1112 | grp->nodes = kcalloc(num + 1, sizeof(*node), GFP_KERNEL); |
| 1113 | if (!grp->nodes) { |
| 1114 | ret = -ENOMEM; |
| 1115 | goto out; |
| 1116 | } |
| 1117 | for (i = 0; i < num; i++) { |
| 1118 | node = &grp->nodes[i]; |
| 1119 | sprintf(node->name, grp->format, i + 1); |
| 1120 | node->sda.index = (grp->option << 16) | (i & 0xffff); |
| 1121 | node->sda.dev_attr.show = grp->show; |
| 1122 | node->sda.dev_attr.store = grp->store; |
| 1123 | attr = &node->sda.dev_attr.attr; |
| 1124 | sysfs_attr_init(attr); |
| 1125 | attr->name = node->name; |
| 1126 | attr->mode = S_IRUGO | (grp->store ? S_IWUSR : 0); |
| 1127 | ret = sysfs_create_file(&pdev->dev.kobj, attr); |
| 1128 | if (ret) { |
| 1129 | attr->name = NULL; |
| 1130 | goto out; |
| 1131 | } |
| 1132 | } |
| 1133 | } |
| 1134 | |
| 1135 | return 0; |
| 1136 | out: |
| 1137 | applesmc_destroy_nodes(groups); |
| 1138 | return ret; |
| 1139 | } |
| 1140 | |
| 1141 | /* Create accelerometer resources */ |
| 1142 | static int applesmc_create_accelerometer(void) |
| 1143 | { |
| 1144 | struct input_dev *idev; |
| 1145 | int ret; |
| 1146 | |
| 1147 | if (!smcreg.has_accelerometer) |
| 1148 | return 0; |
| 1149 | |
| 1150 | ret = applesmc_create_nodes(accelerometer_group, 1); |
| 1151 | if (ret) |
| 1152 | goto out; |
| 1153 | |
| 1154 | applesmc_idev = input_allocate_polled_device(); |
| 1155 | if (!applesmc_idev) { |
| 1156 | ret = -ENOMEM; |
| 1157 | goto out_sysfs; |
| 1158 | } |
| 1159 | |
| 1160 | applesmc_idev->poll = applesmc_idev_poll; |
| 1161 | applesmc_idev->poll_interval = APPLESMC_POLL_INTERVAL; |
| 1162 | |
| 1163 | /* initial calibrate for the input device */ |
| 1164 | applesmc_calibrate(); |
| 1165 | |
| 1166 | /* initialize the input device */ |
| 1167 | idev = applesmc_idev->input; |
| 1168 | idev->name = "applesmc"; |
| 1169 | idev->id.bustype = BUS_HOST; |
| 1170 | idev->dev.parent = &pdev->dev; |
| 1171 | idev->evbit[0] = BIT_MASK(EV_ABS); |
| 1172 | input_set_abs_params(idev, ABS_X, |
| 1173 | -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); |
| 1174 | input_set_abs_params(idev, ABS_Y, |
| 1175 | -256, 256, APPLESMC_INPUT_FUZZ, APPLESMC_INPUT_FLAT); |
| 1176 | |
| 1177 | ret = input_register_polled_device(applesmc_idev); |
| 1178 | if (ret) |
| 1179 | goto out_idev; |
| 1180 | |
| 1181 | return 0; |
| 1182 | |
| 1183 | out_idev: |
| 1184 | input_free_polled_device(applesmc_idev); |
| 1185 | |
| 1186 | out_sysfs: |
| 1187 | applesmc_destroy_nodes(accelerometer_group); |
| 1188 | |
| 1189 | out: |
| 1190 | pr_warn("driver init failed (ret=%d)!\n", ret); |
| 1191 | return ret; |
| 1192 | } |
| 1193 | |
| 1194 | /* Release all resources used by the accelerometer */ |
| 1195 | static void applesmc_release_accelerometer(void) |
| 1196 | { |
| 1197 | if (!smcreg.has_accelerometer) |
| 1198 | return; |
| 1199 | input_unregister_polled_device(applesmc_idev); |
| 1200 | input_free_polled_device(applesmc_idev); |
| 1201 | applesmc_destroy_nodes(accelerometer_group); |
| 1202 | } |
| 1203 | |
| 1204 | static int applesmc_create_light_sensor(void) |
| 1205 | { |
| 1206 | if (!smcreg.num_light_sensors) |
| 1207 | return 0; |
| 1208 | return applesmc_create_nodes(light_sensor_group, 1); |
| 1209 | } |
| 1210 | |
| 1211 | static void applesmc_release_light_sensor(void) |
| 1212 | { |
| 1213 | if (!smcreg.num_light_sensors) |
| 1214 | return; |
| 1215 | applesmc_destroy_nodes(light_sensor_group); |
| 1216 | } |
| 1217 | |
| 1218 | static int applesmc_create_key_backlight(void) |
| 1219 | { |
| 1220 | if (!smcreg.has_key_backlight) |
| 1221 | return 0; |
| 1222 | applesmc_led_wq = create_singlethread_workqueue("applesmc-led"); |
| 1223 | if (!applesmc_led_wq) |
| 1224 | return -ENOMEM; |
| 1225 | return led_classdev_register(&pdev->dev, &applesmc_backlight); |
| 1226 | } |
| 1227 | |
| 1228 | static void applesmc_release_key_backlight(void) |
| 1229 | { |
| 1230 | if (!smcreg.has_key_backlight) |
| 1231 | return; |
| 1232 | led_classdev_unregister(&applesmc_backlight); |
| 1233 | destroy_workqueue(applesmc_led_wq); |
| 1234 | } |
| 1235 | |
| 1236 | static int applesmc_dmi_match(const struct dmi_system_id *id) |
| 1237 | { |
| 1238 | return 1; |
| 1239 | } |
| 1240 | |
| 1241 | /* |
| 1242 | * Note that DMI_MATCH(...,"MacBook") will match "MacBookPro1,1". |
| 1243 | * So we need to put "Apple MacBook Pro" before "Apple MacBook". |
| 1244 | */ |
| 1245 | static __initdata struct dmi_system_id applesmc_whitelist[] = { |
| 1246 | { applesmc_dmi_match, "Apple MacBook Air", { |
| 1247 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
| 1248 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir") }, |
| 1249 | }, |
| 1250 | { applesmc_dmi_match, "Apple MacBook Pro", { |
| 1251 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
| 1252 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro") }, |
| 1253 | }, |
| 1254 | { applesmc_dmi_match, "Apple MacBook", { |
| 1255 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
| 1256 | DMI_MATCH(DMI_PRODUCT_NAME, "MacBook") }, |
| 1257 | }, |
| 1258 | { applesmc_dmi_match, "Apple Macmini", { |
| 1259 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
| 1260 | DMI_MATCH(DMI_PRODUCT_NAME, "Macmini") }, |
| 1261 | }, |
| 1262 | { applesmc_dmi_match, "Apple MacPro", { |
| 1263 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
| 1264 | DMI_MATCH(DMI_PRODUCT_NAME, "MacPro") }, |
| 1265 | }, |
| 1266 | { applesmc_dmi_match, "Apple iMac", { |
| 1267 | DMI_MATCH(DMI_BOARD_VENDOR, "Apple"), |
| 1268 | DMI_MATCH(DMI_PRODUCT_NAME, "iMac") }, |
| 1269 | }, |
| 1270 | { .ident = NULL } |
| 1271 | }; |
| 1272 | |
| 1273 | static int __init applesmc_init(void) |
| 1274 | { |
| 1275 | int ret; |
| 1276 | |
| 1277 | if (!dmi_check_system(applesmc_whitelist)) { |
| 1278 | pr_warn("supported laptop not found!\n"); |
| 1279 | ret = -ENODEV; |
| 1280 | goto out; |
| 1281 | } |
| 1282 | |
| 1283 | if (!request_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS, |
| 1284 | "applesmc")) { |
| 1285 | ret = -ENXIO; |
| 1286 | goto out; |
| 1287 | } |
| 1288 | |
| 1289 | ret = platform_driver_register(&applesmc_driver); |
| 1290 | if (ret) |
| 1291 | goto out_region; |
| 1292 | |
| 1293 | pdev = platform_device_register_simple("applesmc", APPLESMC_DATA_PORT, |
| 1294 | NULL, 0); |
| 1295 | if (IS_ERR(pdev)) { |
| 1296 | ret = PTR_ERR(pdev); |
| 1297 | goto out_driver; |
| 1298 | } |
| 1299 | |
| 1300 | /* create register cache */ |
| 1301 | ret = applesmc_init_smcreg(); |
| 1302 | if (ret) |
| 1303 | goto out_device; |
| 1304 | |
| 1305 | ret = applesmc_create_nodes(info_group, 1); |
| 1306 | if (ret) |
| 1307 | goto out_smcreg; |
| 1308 | |
| 1309 | ret = applesmc_create_nodes(fan_group, smcreg.fan_count); |
| 1310 | if (ret) |
| 1311 | goto out_info; |
| 1312 | |
| 1313 | ret = applesmc_create_nodes(temp_group, smcreg.index_count); |
| 1314 | if (ret) |
| 1315 | goto out_fans; |
| 1316 | |
| 1317 | ret = applesmc_create_accelerometer(); |
| 1318 | if (ret) |
| 1319 | goto out_temperature; |
| 1320 | |
| 1321 | ret = applesmc_create_light_sensor(); |
| 1322 | if (ret) |
| 1323 | goto out_accelerometer; |
| 1324 | |
| 1325 | ret = applesmc_create_key_backlight(); |
| 1326 | if (ret) |
| 1327 | goto out_light_sysfs; |
| 1328 | |
| 1329 | hwmon_dev = hwmon_device_register(&pdev->dev); |
| 1330 | if (IS_ERR(hwmon_dev)) { |
| 1331 | ret = PTR_ERR(hwmon_dev); |
| 1332 | goto out_light_ledclass; |
| 1333 | } |
| 1334 | |
| 1335 | return 0; |
| 1336 | |
| 1337 | out_light_ledclass: |
| 1338 | applesmc_release_key_backlight(); |
| 1339 | out_light_sysfs: |
| 1340 | applesmc_release_light_sensor(); |
| 1341 | out_accelerometer: |
| 1342 | applesmc_release_accelerometer(); |
| 1343 | out_temperature: |
| 1344 | applesmc_destroy_nodes(temp_group); |
| 1345 | out_fans: |
| 1346 | applesmc_destroy_nodes(fan_group); |
| 1347 | out_info: |
| 1348 | applesmc_destroy_nodes(info_group); |
| 1349 | out_smcreg: |
| 1350 | applesmc_destroy_smcreg(); |
| 1351 | out_device: |
| 1352 | platform_device_unregister(pdev); |
| 1353 | out_driver: |
| 1354 | platform_driver_unregister(&applesmc_driver); |
| 1355 | out_region: |
| 1356 | release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); |
| 1357 | out: |
| 1358 | pr_warn("driver init failed (ret=%d)!\n", ret); |
| 1359 | return ret; |
| 1360 | } |
| 1361 | |
| 1362 | static void __exit applesmc_exit(void) |
| 1363 | { |
| 1364 | hwmon_device_unregister(hwmon_dev); |
| 1365 | applesmc_release_key_backlight(); |
| 1366 | applesmc_release_light_sensor(); |
| 1367 | applesmc_release_accelerometer(); |
| 1368 | applesmc_destroy_nodes(temp_group); |
| 1369 | applesmc_destroy_nodes(fan_group); |
| 1370 | applesmc_destroy_nodes(info_group); |
| 1371 | applesmc_destroy_smcreg(); |
| 1372 | platform_device_unregister(pdev); |
| 1373 | platform_driver_unregister(&applesmc_driver); |
| 1374 | release_region(APPLESMC_DATA_PORT, APPLESMC_NR_PORTS); |
| 1375 | } |
| 1376 | |
| 1377 | module_init(applesmc_init); |
| 1378 | module_exit(applesmc_exit); |
| 1379 | |
| 1380 | MODULE_AUTHOR("Nicolas Boichat"); |
| 1381 | MODULE_DESCRIPTION("Apple SMC"); |
| 1382 | MODULE_LICENSE("GPL v2"); |
| 1383 | MODULE_DEVICE_TABLE(dmi, applesmc_whitelist); |