drivers/platform/x86/compal-laptop.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*-*-linux-c-*-*/
   3
   4 /*
   5   Copyright (C) 2008 Cezary Jackiewicz <cezary.jackiewicz (at) gmail.com>
   6
   7   based on MSI driver
   8
   9   Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de>
  10
  11  */
  12
  13 /*
  14  * compal-laptop.c - Compal laptop support.
  15  *
  16  * This driver exports a few files in /sys/devices/platform/compal-laptop/:
  17  *   wake_up_XXX   Whether or not we listen to such wake up events (rw)
  18  *
  19  * In addition to these platform device attributes the driver
  20  * registers itself in the Linux backlight control, power_supply, rfkill
  21  * and hwmon subsystem and is available to userspace under:
  22  *
  23  *   /sys/class/backlight/compal-laptop/
  24  *   /sys/class/power_supply/compal-laptop/
  25  *   /sys/class/rfkill/rfkillX/
  26  *   /sys/class/hwmon/hwmonX/
  27  *
  28  * Notes on the power_supply battery interface:
  29  *   - the "minimum" design voltage is *the* design voltage
  30  *   - the ambient temperature is the average battery temperature
  31  *     and the value is an educated guess (see commented code below)
  32  *
  33  *
  34  * This driver might work on other laptops produced by Compal. If you
  35  * want to try it you can pass force=1 as argument to the module which
  36  * will force it to load even when the DMI data doesn't identify the
  37  * laptop as compatible.
  38  *
  39  * Lots of data available at:
  40  * http://service1.marasst.com/Compal/JHL90_91/Service%20Manual/
  41  * JHL90%20service%20manual-Final-0725.pdf
  42  *
  43  *
  44  *
  45  * Support for the Compal JHL90 added by Roald Frederickx
  46  * (roald.frederickx@gmail.com):
  47  * Driver got large revision. Added functionalities: backlight
  48  * power, wake_on_XXX, a hwmon and power_supply interface.
  49  *
  50  * In case this gets merged into the kernel source: I want to dedicate this
  51  * to Kasper Meerts, the awesome guy who showed me Linux and C!
  52  */
  53
  54 /* NOTE: currently the wake_on_XXX, hwmon and power_supply interfaces are
  55  * only enabled on a JHL90 board until it is verified that they work on the
  56  * other boards too.  See the extra_features variable. */
  57
  58 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  59
  60 #include <linux/module.h>
  61 #include <linux/kernel.h>
  62 #include <linux/init.h>
  63 #include <linux/acpi.h>
  64 #include <linux/dmi.h>
  65 #include <linux/backlight.h>
  66 #include <linux/platform_device.h>
  67 #include <linux/rfkill.h>
  68 #include <linux/hwmon.h>
  69 #include <linux/hwmon-sysfs.h>
  70 #include <linux/power_supply.h>
  71 #include <linux/fb.h>
  72 #include <acpi/video.h>
  73
  74 /* ======= */
  75 /* Defines */
  76 /* ======= */
  77 #define DRIVER_NAME "compal-laptop"
  78 #define DRIVER_VERSION  "0.2.7"
  79
  80 #define BACKLIGHT_LEVEL_ADDR            0xB9
  81 #define BACKLIGHT_LEVEL_MAX             7
  82 #define BACKLIGHT_STATE_ADDR            0x59
  83 #define BACKLIGHT_STATE_ON_DATA         0xE1
  84 #define BACKLIGHT_STATE_OFF_DATA        0xE2
  85
  86 #define WAKE_UP_ADDR                    0xA4
  87 #define WAKE_UP_PME                     (1 << 0)
  88 #define WAKE_UP_MODEM                   (1 << 1)
  89 #define WAKE_UP_LAN                     (1 << 2)
  90 #define WAKE_UP_WLAN                    (1 << 4)
  91 #define WAKE_UP_KEY                     (1 << 6)
  92 #define WAKE_UP_MOUSE                   (1 << 7)
  93
  94 #define WIRELESS_ADDR                   0xBB
  95 #define WIRELESS_WLAN                   (1 << 0)
  96 #define WIRELESS_BT                     (1 << 1)
  97 #define WIRELESS_WLAN_EXISTS            (1 << 2)
  98 #define WIRELESS_BT_EXISTS              (1 << 3)
  99 #define WIRELESS_KILLSWITCH             (1 << 4)
 100
 101 #define PWM_ADDRESS                     0x46
 102 #define PWM_DISABLE_ADDR                0x59
 103 #define PWM_DISABLE_DATA                0xA5
 104 #define PWM_ENABLE_ADDR                 0x59
 105 #define PWM_ENABLE_DATA                 0xA8
 106
 107 #define FAN_ADDRESS                     0x46
 108 #define FAN_DATA                        0x81
 109 #define FAN_FULL_ON_CMD                 0x59 /* Doesn't seem to work. Just */
 110 #define FAN_FULL_ON_ENABLE              0x76 /* force the pwm signal to its */
 111 #define FAN_FULL_ON_DISABLE             0x77 /* maximum value instead */
 112
 113 #define TEMP_CPU                        0xB0
 114 #define TEMP_CPU_LOCAL                  0xB1
 115 #define TEMP_CPU_DTS                    0xB5
 116 #define TEMP_NORTHBRIDGE                0xB6
 117 #define TEMP_VGA                        0xB4
 118 #define TEMP_SKIN                       0xB2
 119
 120 #define BAT_MANUFACTURER_NAME_ADDR      0x10
 121 #define BAT_MANUFACTURER_NAME_LEN       9
 122 #define BAT_MODEL_NAME_ADDR             0x19
 123 #define BAT_MODEL_NAME_LEN              6
 124 #define BAT_SERIAL_NUMBER_ADDR          0xC4
 125 #define BAT_SERIAL_NUMBER_LEN           5
 126 #define BAT_CHARGE_NOW                  0xC2
 127 #define BAT_CHARGE_DESIGN               0xCA
 128 #define BAT_VOLTAGE_NOW                 0xC6
 129 #define BAT_VOLTAGE_DESIGN              0xC8
 130 #define BAT_CURRENT_NOW                 0xD0
 131 #define BAT_CURRENT_AVG                 0xD2
 132 #define BAT_POWER                       0xD4
 133 #define BAT_CAPACITY                    0xCE
 134 #define BAT_TEMP                        0xD6
 135 #define BAT_TEMP_AVG                    0xD7
 136 #define BAT_STATUS0                     0xC1
 137 #define BAT_STATUS1                     0xF0
 138 #define BAT_STATUS2                     0xF1
 139 #define BAT_STOP_CHARGE1                0xF2
 140 #define BAT_STOP_CHARGE2                0xF3
 141 #define BAT_CHARGE_LIMIT                0x03
 142 #define BAT_CHARGE_LIMIT_MAX            100
 143
 144 #define BAT_S0_DISCHARGE                (1 << 0)
 145 #define BAT_S0_DISCHRG_CRITICAL         (1 << 2)
 146 #define BAT_S0_LOW                      (1 << 3)
 147 #define BAT_S0_CHARGING                 (1 << 1)
 148 #define BAT_S0_AC                       (1 << 7)
 149 #define BAT_S1_EXISTS                   (1 << 0)
 150 #define BAT_S1_FULL                     (1 << 1)
 151 #define BAT_S1_EMPTY                    (1 << 2)
 152 #define BAT_S1_LiION_OR_NiMH            (1 << 7)
 153 #define BAT_S2_LOW_LOW                  (1 << 0)
 154 #define BAT_STOP_CHRG1_BAD_CELL         (1 << 1)
 155 #define BAT_STOP_CHRG1_COMM_FAIL        (1 << 2)
 156 #define BAT_STOP_CHRG1_OVERVOLTAGE      (1 << 6)
 157 #define BAT_STOP_CHRG1_OVERTEMPERATURE  (1 << 7)
 158
 159
 160 /* ======= */
 161 /* Structs */
 162 /* ======= */
 163 struct compal_data{
 164         /* Fan control */
 165         int pwm_enable; /* 0:full on, 1:set by pwm1, 2:control by motherboard */
 166         unsigned char curr_pwm;
 167
 168         /* Power supply */
 169         struct power_supply *psy;
 170         struct power_supply_info psy_info;
 171         char bat_model_name[BAT_MODEL_NAME_LEN + 1];
 172         char bat_manufacturer_name[BAT_MANUFACTURER_NAME_LEN + 1];
 173         char bat_serial_number[BAT_SERIAL_NUMBER_LEN + 1];
 174 };
 175
 176
 177 /* =============== */
 178 /* General globals */
 179 /* =============== */
 180 static bool force;
 181 module_param(force, bool, 0);
 182 MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");
 183
 184 /* Support for the wake_on_XXX, hwmon and power_supply interface. Currently
 185  * only gets enabled on a JHL90 board. Might work with the others too */
 186 static bool extra_features;
 187
 188 /* Nasty stuff. For some reason the fan control is very un-linear.  I've
 189  * come up with these values by looping through the possible inputs and
 190  * watching the output of address 0x4F (do an ec_transaction writing 0x33
 191  * into 0x4F and read a few bytes from the output, like so:
 192  *      u8 writeData = 0x33;
 193  *      ec_transaction(0x4F, &writeData, 1, buffer, 32);
 194  * That address is labeled "fan1 table information" in the service manual.
 195  * It should be clear which value in 'buffer' changes). This seems to be
 196  * related to fan speed. It isn't a proper 'realtime' fan speed value
 197  * though, because physically stopping or speeding up the fan doesn't
 198  * change it. It might be the average voltage or current of the pwm output.
 199  * Nevertheless, it is more fine-grained than the actual RPM reading */
 200 static const unsigned char pwm_lookup_table[256] = {
 201         0, 0, 0, 1, 1, 1, 2, 253, 254, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6,
 202         7, 7, 7, 8, 86, 86, 9, 9, 9, 10, 10, 10, 11, 92, 92, 12, 12, 95,
 203         13, 66, 66, 14, 14, 98, 15, 15, 15, 16, 16, 67, 17, 17, 72, 18, 70,
 204         75, 19, 90, 90, 73, 73, 73, 21, 21, 91, 91, 91, 96, 23, 94, 94, 94,
 205         94, 94, 94, 94, 94, 94, 94, 141, 141, 238, 223, 192, 139, 139, 139,
 206         139, 139, 142, 142, 142, 142, 142, 78, 78, 78, 78, 78, 76, 76, 76,
 207         76, 76, 79, 79, 79, 79, 79, 79, 79, 20, 20, 20, 20, 20, 22, 22, 22,
 208         22, 22, 24, 24, 24, 24, 24, 24, 219, 219, 219, 219, 219, 219, 219,
 209         219, 27, 27, 188, 188, 28, 28, 28, 29, 186, 186, 186, 186, 186,
 210         186, 186, 186, 186, 186, 31, 31, 31, 31, 31, 32, 32, 32, 41, 33,
 211         33, 33, 33, 33, 252, 252, 34, 34, 34, 43, 35, 35, 35, 36, 36, 38,
 212         206, 206, 206, 206, 206, 206, 206, 206, 206, 37, 37, 37, 46, 46,
 213         47, 47, 232, 232, 232, 232, 232, 232, 232, 232, 232, 232, 48, 48,
 214         48, 48, 48, 40, 40, 40, 49, 42, 42, 42, 42, 42, 42, 42, 42, 44,
 215         189, 189, 189, 189, 54, 54, 45, 45, 45, 45, 45, 45, 45, 45, 251,
 216         191, 199, 199, 199, 199, 199, 215, 215, 215, 215, 187, 187, 187,
 217         187, 187, 193, 50
 218 };
 219
 220
 221
 222
 223 /* ========================= */
 224 /* Hardware access functions */
 225 /* ========================= */
 226 /* General access */
 227 static u8 ec_read_u8(u8 addr)
 228 {
 229         u8 value = 0;
 230         ec_read(addr, &value);
 231         return value;
 232 }
 233
 234 static s8 ec_read_s8(u8 addr)
 235 {
 236         return (s8)ec_read_u8(addr);
 237 }
 238
 239 static u16 ec_read_u16(u8 addr)
 240 {
 241         int hi, lo;
 242         lo = ec_read_u8(addr);
 243         hi = ec_read_u8(addr + 1);
 244         return (hi << 8) + lo;
 245 }
 246
 247 static s16 ec_read_s16(u8 addr)
 248 {
 249         return (s16) ec_read_u16(addr);
 250 }
 251
 252 static void ec_read_sequence(u8 addr, u8 *buf, int len)
 253 {
 254         int i;
 255         for (i = 0; i < len; i++)
 256                 ec_read(addr + i, buf + i);
 257 }
 258
 259
 260 /* Backlight access */
 261 static int set_backlight_level(int level)
 262 {
 263         if (level < 0 || level > BACKLIGHT_LEVEL_MAX)
 264                 return -EINVAL;
 265
 266         ec_write(BACKLIGHT_LEVEL_ADDR, level);
 267
 268         return 0;
 269 }
 270
 271 static int get_backlight_level(void)
 272 {
 273         return (int) ec_read_u8(BACKLIGHT_LEVEL_ADDR);
 274 }
 275
 276 static void set_backlight_state(bool on)
 277 {
 278         u8 data = on ? BACKLIGHT_STATE_ON_DATA : BACKLIGHT_STATE_OFF_DATA;
 279         ec_transaction(BACKLIGHT_STATE_ADDR, &data, 1, NULL, 0);
 280 }
 281
 282
 283 /* Fan control access */
 284 static void pwm_enable_control(void)
 285 {
 286         unsigned char writeData = PWM_ENABLE_DATA;
 287         ec_transaction(PWM_ENABLE_ADDR, &writeData, 1, NULL, 0);
 288 }
 289
 290 static void pwm_disable_control(void)
 291 {
 292         unsigned char writeData = PWM_DISABLE_DATA;
 293         ec_transaction(PWM_DISABLE_ADDR, &writeData, 1, NULL, 0);
 294 }
 295
 296 static void set_pwm(int pwm)
 297 {
 298         ec_transaction(PWM_ADDRESS, &pwm_lookup_table[pwm], 1, NULL, 0);
 299 }
 300
 301 static int get_fan_rpm(void)
 302 {
 303         u8 value, data = FAN_DATA;
 304         ec_transaction(FAN_ADDRESS, &data, 1, &value, 1);
 305         return 100 * (int)value;
 306 }
 307
 308
 309
 310
 311 /* =================== */
 312 /* Interface functions */
 313 /* =================== */
 314
 315 /* Backlight interface */
 316 static int bl_get_brightness(struct backlight_device *b)
 317 {
 318         return get_backlight_level();
 319 }
 320
 321 static int bl_update_status(struct backlight_device *b)
 322 {
 323         int ret = set_backlight_level(b->props.brightness);
 324         if (ret)
 325                 return ret;
 326
 327         set_backlight_state(!backlight_is_blank(b));
 328         return 0;
 329 }
 330
 331 static const struct backlight_ops compalbl_ops = {
 332         .get_brightness = bl_get_brightness,
 333         .update_status  = bl_update_status,
 334 };
 335
 336
 337 /* Wireless interface */
 338 static int compal_rfkill_set(void *data, bool blocked)
 339 {
 340         unsigned long radio = (unsigned long) data;
 341         u8 result = ec_read_u8(WIRELESS_ADDR);
 342         u8 value;
 343
 344         if (!blocked)
 345                 value = (u8) (result | radio);
 346         else
 347                 value = (u8) (result & ~radio);
 348         ec_write(WIRELESS_ADDR, value);
 349
 350         return 0;
 351 }
 352
 353 static void compal_rfkill_poll(struct rfkill *rfkill, void *data)
 354 {
 355         u8 result = ec_read_u8(WIRELESS_ADDR);
 356         bool hw_blocked = !(result & WIRELESS_KILLSWITCH);
 357         rfkill_set_hw_state(rfkill, hw_blocked);
 358 }
 359
 360 static const struct rfkill_ops compal_rfkill_ops = {
 361         .poll = compal_rfkill_poll,
 362         .set_block = compal_rfkill_set,
 363 };
 364
 365
 366 /* Wake_up interface */
 367 #define SIMPLE_MASKED_STORE_SHOW(NAME, ADDR, MASK)                      \
 368 static ssize_t NAME##_show(struct device *dev,                          \
 369         struct device_attribute *attr, char *buf)                       \
 370 {                                                                       \
 371         return sprintf(buf, "%d\n", ((ec_read_u8(ADDR) & MASK) != 0));  \
 372 }                                                                       \
 373 static ssize_t NAME##_store(struct device *dev,                         \
 374         struct device_attribute *attr, const char *buf, size_t count)   \
 375 {                                                                       \
 376         int state;                                                      \
 377         u8 old_val = ec_read_u8(ADDR);                                  \
 378         if (sscanf(buf, "%d", &state) != 1 || (state < 0 || state > 1)) \
 379                 return -EINVAL;                                         \
 380         ec_write(ADDR, state ? (old_val | MASK) : (old_val & ~MASK));   \
 381         return count;                                                   \
 382 }
 383
 384 SIMPLE_MASKED_STORE_SHOW(wake_up_pme,   WAKE_UP_ADDR, WAKE_UP_PME)
 385 SIMPLE_MASKED_STORE_SHOW(wake_up_modem, WAKE_UP_ADDR, WAKE_UP_MODEM)
 386 SIMPLE_MASKED_STORE_SHOW(wake_up_lan,   WAKE_UP_ADDR, WAKE_UP_LAN)
 387 SIMPLE_MASKED_STORE_SHOW(wake_up_wlan,  WAKE_UP_ADDR, WAKE_UP_WLAN)
 388 SIMPLE_MASKED_STORE_SHOW(wake_up_key,   WAKE_UP_ADDR, WAKE_UP_KEY)
 389 SIMPLE_MASKED_STORE_SHOW(wake_up_mouse, WAKE_UP_ADDR, WAKE_UP_MOUSE)
 390
 391 /* Fan control interface */
 392 static ssize_t pwm_enable_show(struct device *dev,
 393                 struct device_attribute *attr, char *buf)
 394 {
 395         struct compal_data *data = dev_get_drvdata(dev);
 396         return sprintf(buf, "%d\n", data->pwm_enable);
 397 }
 398
 399 static ssize_t pwm_enable_store(struct device *dev,
 400                 struct device_attribute *attr, const char *buf, size_t count)
 401 {
 402         struct compal_data *data = dev_get_drvdata(dev);
 403         long val;
 404         int err;
 405
 406         err = kstrtol(buf, 10, &val);
 407         if (err)
 408                 return err;
 409         if (val < 0)
 410                 return -EINVAL;
 411
 412         data->pwm_enable = val;
 413
 414         switch (val) {
 415         case 0:  /* Full speed */
 416                 pwm_enable_control();
 417                 set_pwm(255);
 418                 break;
 419         case 1:  /* As set by pwm1 */
 420                 pwm_enable_control();
 421                 set_pwm(data->curr_pwm);
 422                 break;
 423         default: /* Control by motherboard */
 424                 pwm_disable_control();
 425                 break;
 426         }
 427
 428         return count;
 429 }
 430
 431 static ssize_t pwm_show(struct device *dev, struct device_attribute *attr,
 432                 char *buf)
 433 {
 434         struct compal_data *data = dev_get_drvdata(dev);
 435         return sprintf(buf, "%hhu\n", data->curr_pwm);
 436 }
 437
 438 static ssize_t pwm_store(struct device *dev, struct device_attribute *attr,
 439                 const char *buf, size_t count)
 440 {
 441         struct compal_data *data = dev_get_drvdata(dev);
 442         long val;
 443         int err;
 444
 445         err = kstrtol(buf, 10, &val);
 446         if (err)
 447                 return err;
 448         if (val < 0 || val > 255)
 449                 return -EINVAL;
 450
 451         data->curr_pwm = val;
 452
 453         if (data->pwm_enable != 1)
 454                 return count;
 455         set_pwm(val);
 456
 457         return count;
 458 }
 459
 460 static ssize_t fan_show(struct device *dev, struct device_attribute *attr,
 461                 char *buf)
 462 {
 463         return sprintf(buf, "%d\n", get_fan_rpm());
 464 }
 465
 466
 467 /* Temperature interface */
 468 #define TEMPERATURE_SHOW_TEMP_AND_LABEL(POSTFIX, ADDRESS, LABEL)        \
 469 static ssize_t temp_##POSTFIX(struct device *dev,                       \
 470                 struct device_attribute *attr, char *buf)               \
 471 {                                                                       \
 472         return sprintf(buf, "%d\n", 1000 * (int)ec_read_s8(ADDRESS));   \
 473 }                                                                       \
 474 static ssize_t label_##POSTFIX(struct device *dev,                      \
 475                 struct device_attribute *attr, char *buf)               \
 476 {                                                                       \
 477         return sprintf(buf, "%s\n", LABEL);                             \
 478 }
 479
 480 /* Labels as in service guide */
 481 TEMPERATURE_SHOW_TEMP_AND_LABEL(cpu,        TEMP_CPU,        "CPU_TEMP");
 482 TEMPERATURE_SHOW_TEMP_AND_LABEL(cpu_local,  TEMP_CPU_LOCAL,  "CPU_TEMP_LOCAL");
 483 TEMPERATURE_SHOW_TEMP_AND_LABEL(cpu_DTS,    TEMP_CPU_DTS,    "CPU_DTS");
 484 TEMPERATURE_SHOW_TEMP_AND_LABEL(northbridge,TEMP_NORTHBRIDGE,"NorthBridge");
 485 TEMPERATURE_SHOW_TEMP_AND_LABEL(vga,        TEMP_VGA,        "VGA_TEMP");
 486 TEMPERATURE_SHOW_TEMP_AND_LABEL(SKIN,       TEMP_SKIN,       "SKIN_TEMP90");
 487
 488
 489 /* Power supply interface */
 490 static int bat_status(void)
 491 {
 492         u8 status0 = ec_read_u8(BAT_STATUS0);
 493         u8 status1 = ec_read_u8(BAT_STATUS1);
 494
 495         if (status0 & BAT_S0_CHARGING)
 496                 return POWER_SUPPLY_STATUS_CHARGING;
 497         if (status0 & BAT_S0_DISCHARGE)
 498                 return POWER_SUPPLY_STATUS_DISCHARGING;
 499         if (status1 & BAT_S1_FULL)
 500                 return POWER_SUPPLY_STATUS_FULL;
 501         return POWER_SUPPLY_STATUS_NOT_CHARGING;
 502 }
 503
 504 static int bat_health(void)
 505 {
 506         u8 status = ec_read_u8(BAT_STOP_CHARGE1);
 507
 508         if (status & BAT_STOP_CHRG1_OVERTEMPERATURE)
 509                 return POWER_SUPPLY_HEALTH_OVERHEAT;
 510         if (status & BAT_STOP_CHRG1_OVERVOLTAGE)
 511                 return POWER_SUPPLY_HEALTH_OVERVOLTAGE;
 512         if (status & BAT_STOP_CHRG1_BAD_CELL)
 513                 return POWER_SUPPLY_HEALTH_DEAD;
 514         if (status & BAT_STOP_CHRG1_COMM_FAIL)
 515                 return POWER_SUPPLY_HEALTH_UNKNOWN;
 516         return POWER_SUPPLY_HEALTH_GOOD;
 517 }
 518
 519 static int bat_is_present(void)
 520 {
 521         u8 status = ec_read_u8(BAT_STATUS2);
 522         return ((status & BAT_S1_EXISTS) != 0);
 523 }
 524
 525 static int bat_technology(void)
 526 {
 527         u8 status = ec_read_u8(BAT_STATUS1);
 528
 529         if (status & BAT_S1_LiION_OR_NiMH)
 530                 return POWER_SUPPLY_TECHNOLOGY_LION;
 531         return POWER_SUPPLY_TECHNOLOGY_NiMH;
 532 }
 533
 534 static int bat_capacity_level(void)
 535 {
 536         u8 status0 = ec_read_u8(BAT_STATUS0);
 537         u8 status1 = ec_read_u8(BAT_STATUS1);
 538         u8 status2 = ec_read_u8(BAT_STATUS2);
 539
 540         if (status0 & BAT_S0_DISCHRG_CRITICAL
 541                         || status1 & BAT_S1_EMPTY
 542                         || status2 & BAT_S2_LOW_LOW)
 543                 return POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
 544         if (status0 & BAT_S0_LOW)
 545                 return POWER_SUPPLY_CAPACITY_LEVEL_LOW;
 546         if (status1 & BAT_S1_FULL)
 547                 return POWER_SUPPLY_CAPACITY_LEVEL_FULL;
 548         return POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
 549 }
 550
 551 static int bat_get_property(struct power_supply *psy,
 552                                 enum power_supply_property psp,
 553                                 union power_supply_propval *val)
 554 {
 555         struct compal_data *data = power_supply_get_drvdata(psy);
 556
 557         switch (psp) {
 558         case POWER_SUPPLY_PROP_STATUS:
 559                 val->intval = bat_status();
 560                 break;
 561         case POWER_SUPPLY_PROP_HEALTH:
 562                 val->intval = bat_health();
 563                 break;
 564         case POWER_SUPPLY_PROP_PRESENT:
 565                 val->intval = bat_is_present();
 566                 break;
 567         case POWER_SUPPLY_PROP_TECHNOLOGY:
 568                 val->intval = bat_technology();
 569                 break;
 570         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: /* THE design voltage... */
 571                 val->intval = ec_read_u16(BAT_VOLTAGE_DESIGN) * 1000;
 572                 break;
 573         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 574                 val->intval = ec_read_u16(BAT_VOLTAGE_NOW) * 1000;
 575                 break;
 576         case POWER_SUPPLY_PROP_CURRENT_NOW:
 577                 val->intval = ec_read_s16(BAT_CURRENT_NOW) * 1000;
 578                 break;
 579         case POWER_SUPPLY_PROP_CURRENT_AVG:
 580                 val->intval = ec_read_s16(BAT_CURRENT_AVG) * 1000;
 581                 break;
 582         case POWER_SUPPLY_PROP_POWER_NOW:
 583                 val->intval = ec_read_u8(BAT_POWER) * 1000000;
 584                 break;
 585         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
 586                 val->intval = ec_read_u16(BAT_CHARGE_DESIGN) * 1000;
 587                 break;
 588         case POWER_SUPPLY_PROP_CHARGE_NOW:
 589                 val->intval = ec_read_u16(BAT_CHARGE_NOW) * 1000;
 590                 break;
 591         case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
 592                 val->intval = ec_read_u8(BAT_CHARGE_LIMIT);
 593                 break;
 594         case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
 595                 val->intval = BAT_CHARGE_LIMIT_MAX;
 596                 break;
 597         case POWER_SUPPLY_PROP_CAPACITY:
 598                 val->intval = ec_read_u8(BAT_CAPACITY);
 599                 break;
 600         case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
 601                 val->intval = bat_capacity_level();
 602                 break;
 603         /* It smees that BAT_TEMP_AVG is a (2's complement?) value showing
 604          * the number of degrees, whereas BAT_TEMP is somewhat more
 605          * complicated. It looks like this is a negative nember with a
 606          * 100/256 divider and an offset of 222. Both were determined
 607          * experimentally by comparing BAT_TEMP and BAT_TEMP_AVG. */
 608         case POWER_SUPPLY_PROP_TEMP:
 609                 val->intval = ((222 - (int)ec_read_u8(BAT_TEMP)) * 1000) >> 8;
 610                 break;
 611         case POWER_SUPPLY_PROP_TEMP_AMBIENT: /* Ambient, Avg, ... same thing */
 612                 val->intval = ec_read_s8(BAT_TEMP_AVG) * 10;
 613                 break;
 614         /* Neither the model name nor manufacturer name work for me. */
 615         case POWER_SUPPLY_PROP_MODEL_NAME:
 616                 val->strval = data->bat_model_name;
 617                 break;
 618         case POWER_SUPPLY_PROP_MANUFACTURER:
 619                 val->strval = data->bat_manufacturer_name;
 620                 break;
 621         case POWER_SUPPLY_PROP_SERIAL_NUMBER:
 622                 val->strval = data->bat_serial_number;
 623                 break;
 624         default:
 625                 break;
 626         }
 627         return 0;
 628 }
 629
 630 static int bat_set_property(struct power_supply *psy,
 631                                 enum power_supply_property psp,
 632                                 const union power_supply_propval *val)
 633 {
 634         int level;
 635
 636         switch (psp) {
 637         case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
 638                 level = val->intval;
 639                 if (level < 0 || level > BAT_CHARGE_LIMIT_MAX)
 640                         return -EINVAL;
 641                 if (ec_write(BAT_CHARGE_LIMIT, level) < 0)
 642                         return -EIO;
 643                 break;
 644         default:
 645                 break;
 646         }
 647         return 0;
 648 }
 649
 650 static int bat_writeable_property(struct power_supply *psy,
 651                                 enum power_supply_property psp)
 652 {
 653         switch (psp) {
 654         case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
 655                 return 1;
 656         default:
 657                 return 0;
 658         }
 659 }
 660
 661
 662
 663
 664 /* ============== */
 665 /* Driver Globals */
 666 /* ============== */
 667 static DEVICE_ATTR_RW(wake_up_pme);
 668 static DEVICE_ATTR_RW(wake_up_modem);
 669 static DEVICE_ATTR_RW(wake_up_lan);
 670 static DEVICE_ATTR_RW(wake_up_wlan);
 671 static DEVICE_ATTR_RW(wake_up_key);
 672 static DEVICE_ATTR_RW(wake_up_mouse);
 673
 674 static DEVICE_ATTR(fan1_input,  S_IRUGO, fan_show,          NULL);
 675 static DEVICE_ATTR(temp1_input, S_IRUGO, temp_cpu,          NULL);
 676 static DEVICE_ATTR(temp2_input, S_IRUGO, temp_cpu_local,    NULL);
 677 static DEVICE_ATTR(temp3_input, S_IRUGO, temp_cpu_DTS,      NULL);
 678 static DEVICE_ATTR(temp4_input, S_IRUGO, temp_northbridge,  NULL);
 679 static DEVICE_ATTR(temp5_input, S_IRUGO, temp_vga,          NULL);
 680 static DEVICE_ATTR(temp6_input, S_IRUGO, temp_SKIN,         NULL);
 681 static DEVICE_ATTR(temp1_label, S_IRUGO, label_cpu,         NULL);
 682 static DEVICE_ATTR(temp2_label, S_IRUGO, label_cpu_local,   NULL);
 683 static DEVICE_ATTR(temp3_label, S_IRUGO, label_cpu_DTS,     NULL);
 684 static DEVICE_ATTR(temp4_label, S_IRUGO, label_northbridge, NULL);
 685 static DEVICE_ATTR(temp5_label, S_IRUGO, label_vga,         NULL);
 686 static DEVICE_ATTR(temp6_label, S_IRUGO, label_SKIN,        NULL);
 687 static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, pwm_show, pwm_store);
 688 static DEVICE_ATTR(pwm1_enable,
 689                    S_IRUGO | S_IWUSR, pwm_enable_show, pwm_enable_store);
 690
 691 static struct attribute *compal_platform_attrs[] = {
 692         &dev_attr_wake_up_pme.attr,
 693         &dev_attr_wake_up_modem.attr,
 694         &dev_attr_wake_up_lan.attr,
 695         &dev_attr_wake_up_wlan.attr,
 696         &dev_attr_wake_up_key.attr,
 697         &dev_attr_wake_up_mouse.attr,
 698         NULL
 699 };
 700 static const struct attribute_group compal_platform_attr_group = {
 701         .attrs = compal_platform_attrs
 702 };
 703
 704 static struct attribute *compal_hwmon_attrs[] = {
 705         &dev_attr_pwm1_enable.attr,
 706         &dev_attr_pwm1.attr,
 707         &dev_attr_fan1_input.attr,
 708         &dev_attr_temp1_input.attr,
 709         &dev_attr_temp2_input.attr,
 710         &dev_attr_temp3_input.attr,
 711         &dev_attr_temp4_input.attr,
 712         &dev_attr_temp5_input.attr,
 713         &dev_attr_temp6_input.attr,
 714         &dev_attr_temp1_label.attr,
 715         &dev_attr_temp2_label.attr,
 716         &dev_attr_temp3_label.attr,
 717         &dev_attr_temp4_label.attr,
 718         &dev_attr_temp5_label.attr,
 719         &dev_attr_temp6_label.attr,
 720         NULL
 721 };
 722 ATTRIBUTE_GROUPS(compal_hwmon);
 723
 724 static enum power_supply_property compal_bat_properties[] = {
 725         POWER_SUPPLY_PROP_STATUS,
 726         POWER_SUPPLY_PROP_HEALTH,
 727         POWER_SUPPLY_PROP_PRESENT,
 728         POWER_SUPPLY_PROP_TECHNOLOGY,
 729         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
 730         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 731         POWER_SUPPLY_PROP_CURRENT_NOW,
 732         POWER_SUPPLY_PROP_CURRENT_AVG,
 733         POWER_SUPPLY_PROP_POWER_NOW,
 734         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 735         POWER_SUPPLY_PROP_CHARGE_NOW,
 736         POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
 737         POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
 738         POWER_SUPPLY_PROP_CAPACITY,
 739         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 740         POWER_SUPPLY_PROP_TEMP,
 741         POWER_SUPPLY_PROP_TEMP_AMBIENT,
 742         POWER_SUPPLY_PROP_MODEL_NAME,
 743         POWER_SUPPLY_PROP_MANUFACTURER,
 744         POWER_SUPPLY_PROP_SERIAL_NUMBER,
 745 };
 746
 747 static struct backlight_device *compalbl_device;
 748
 749 static struct platform_device *compal_device;
 750
 751 static struct rfkill *wifi_rfkill;
 752 static struct rfkill *bt_rfkill;
 753
 754
 755
 756
 757
 758 /* =================================== */
 759 /* Initialization & clean-up functions */
 760 /* =================================== */
 761
 762 static int dmi_check_cb(const struct dmi_system_id *id)
 763 {
 764         pr_info("Identified laptop model '%s'\n", id->ident);
 765         extra_features = false;
 766         return 1;
 767 }
 768
 769 static int dmi_check_cb_extra(const struct dmi_system_id *id)
 770 {
 771         pr_info("Identified laptop model '%s', enabling extra features\n",
 772                 id->ident);
 773         extra_features = true;
 774         return 1;
 775 }
 776
 777 static const struct dmi_system_id compal_dmi_table[] __initconst = {
 778         {
 779                 .ident = "FL90/IFL90",
 780                 .matches = {
 781                         DMI_MATCH(DMI_BOARD_NAME, "IFL90"),
 782                         DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
 783                 },
 784                 .callback = dmi_check_cb
 785         },
 786         {
 787                 .ident = "FL90/IFL90",
 788                 .matches = {
 789                         DMI_MATCH(DMI_BOARD_NAME, "IFL90"),
 790                         DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"),
 791                 },
 792                 .callback = dmi_check_cb
 793         },
 794         {
 795                 .ident = "FL91/IFL91",
 796                 .matches = {
 797                         DMI_MATCH(DMI_BOARD_NAME, "IFL91"),
 798                         DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
 799                 },
 800                 .callback = dmi_check_cb
 801         },
 802         {
 803                 .ident = "FL92/JFL92",
 804                 .matches = {
 805                         DMI_MATCH(DMI_BOARD_NAME, "JFL92"),
 806                         DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
 807                 },
 808                 .callback = dmi_check_cb
 809         },
 810         {
 811                 .ident = "FT00/IFT00",
 812                 .matches = {
 813                         DMI_MATCH(DMI_BOARD_NAME, "IFT00"),
 814                         DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
 815                 },
 816                 .callback = dmi_check_cb
 817         },
 818         {
 819                 .ident = "Dell Mini 9",
 820                 .matches = {
 821                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 822                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 910"),
 823                 },
 824                 .callback = dmi_check_cb
 825         },
 826         {
 827                 .ident = "Dell Mini 10",
 828                 .matches = {
 829                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 830                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1010"),
 831                 },
 832                 .callback = dmi_check_cb
 833         },
 834         {
 835                 .ident = "Dell Mini 10v",
 836                 .matches = {
 837                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 838                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1011"),
 839                 },
 840                 .callback = dmi_check_cb
 841         },
 842         {
 843                 .ident = "Dell Mini 1012",
 844                 .matches = {
 845                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 846                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"),
 847                 },
 848                 .callback = dmi_check_cb
 849         },
 850         {
 851                 .ident = "Dell Inspiron 11z",
 852                 .matches = {
 853                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 854                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1110"),
 855                 },
 856                 .callback = dmi_check_cb
 857         },
 858         {
 859                 .ident = "Dell Mini 12",
 860                 .matches = {
 861                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 862                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1210"),
 863                 },
 864                 .callback = dmi_check_cb
 865         },
 866         {
 867                 .ident = "JHL90",
 868                 .matches = {
 869                         DMI_MATCH(DMI_BOARD_NAME, "JHL90"),
 870                         DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"),
 871                 },
 872                 .callback = dmi_check_cb_extra
 873         },
 874         {
 875                 .ident = "KHLB2",
 876                 .matches = {
 877                         DMI_MATCH(DMI_BOARD_NAME, "KHLB2"),
 878                         DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"),
 879                 },
 880                 .callback = dmi_check_cb_extra
 881         },
 882         { }
 883 };
 884 MODULE_DEVICE_TABLE(dmi, compal_dmi_table);
 885
 886 static const struct power_supply_desc psy_bat_desc = {
 887         .name           = DRIVER_NAME,
 888         .type           = POWER_SUPPLY_TYPE_BATTERY,
 889         .properties     = compal_bat_properties,
 890         .num_properties = ARRAY_SIZE(compal_bat_properties),
 891         .get_property   = bat_get_property,
 892         .set_property   = bat_set_property,
 893         .property_is_writeable = bat_writeable_property,
 894 };
 895
 896 static void initialize_power_supply_data(struct compal_data *data)
 897 {
 898         ec_read_sequence(BAT_MANUFACTURER_NAME_ADDR,
 899                                         data->bat_manufacturer_name,
 900                                         BAT_MANUFACTURER_NAME_LEN);
 901         data->bat_manufacturer_name[BAT_MANUFACTURER_NAME_LEN] = 0;
 902
 903         ec_read_sequence(BAT_MODEL_NAME_ADDR,
 904                                         data->bat_model_name,
 905                                         BAT_MODEL_NAME_LEN);
 906         data->bat_model_name[BAT_MODEL_NAME_LEN] = 0;
 907
 908         scnprintf(data->bat_serial_number, BAT_SERIAL_NUMBER_LEN + 1, "%d",
 909                                 ec_read_u16(BAT_SERIAL_NUMBER_ADDR));
 910 }
 911
 912 static void initialize_fan_control_data(struct compal_data *data)
 913 {
 914         data->pwm_enable = 2; /* Keep motherboard in control for now */
 915         data->curr_pwm = 255; /* Try not to cause a CPU_on_fire exception
 916                                  if we take over... */
 917 }
 918
 919 static int setup_rfkill(void)
 920 {
 921         int ret;
 922
 923         wifi_rfkill = rfkill_alloc("compal-wifi", &compal_device->dev,
 924                                 RFKILL_TYPE_WLAN, &compal_rfkill_ops,
 925                                 (void *) WIRELESS_WLAN);
 926         if (!wifi_rfkill)
 927                 return -ENOMEM;
 928
 929         ret = rfkill_register(wifi_rfkill);
 930         if (ret)
 931                 goto err_wifi;
 932
 933         bt_rfkill = rfkill_alloc("compal-bluetooth", &compal_device->dev,
 934                                 RFKILL_TYPE_BLUETOOTH, &compal_rfkill_ops,
 935                                 (void *) WIRELESS_BT);
 936         if (!bt_rfkill) {
 937                 ret = -ENOMEM;
 938                 goto err_allocate_bt;
 939         }
 940         ret = rfkill_register(bt_rfkill);
 941         if (ret)
 942                 goto err_register_bt;
 943
 944         return 0;
 945
 946 err_register_bt:
 947         rfkill_destroy(bt_rfkill);
 948
 949 err_allocate_bt:
 950         rfkill_unregister(wifi_rfkill);
 951
 952 err_wifi:
 953         rfkill_destroy(wifi_rfkill);
 954
 955         return ret;
 956 }
 957
 958 static int compal_probe(struct platform_device *pdev)
 959 {
 960         int err;
 961         struct compal_data *data;
 962         struct device *hwmon_dev;
 963         struct power_supply_config psy_cfg = {};
 964
 965         if (!extra_features)
 966                 return 0;
 967
 968         /* Fan control */
 969         data = devm_kzalloc(&pdev->dev, sizeof(struct compal_data), GFP_KERNEL);
 970         if (!data)
 971                 return -ENOMEM;
 972
 973         initialize_fan_control_data(data);
 974
 975         err = sysfs_create_group(&pdev->dev.kobj, &compal_platform_attr_group);
 976         if (err)
 977                 return err;
 978
 979         hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev,
 980                                                            "compal", data,
 981                                                            compal_hwmon_groups);
 982         if (IS_ERR(hwmon_dev)) {
 983                 err = PTR_ERR(hwmon_dev);
 984                 goto remove;
 985         }
 986
 987         /* Power supply */
 988         initialize_power_supply_data(data);
 989         psy_cfg.drv_data = data;
 990         data->psy = power_supply_register(&compal_device->dev, &psy_bat_desc,
 991                                           &psy_cfg);
 992         if (IS_ERR(data->psy)) {
 993                 err = PTR_ERR(data->psy);
 994                 goto remove;
 995         }
 996
 997         platform_set_drvdata(pdev, data);
 998
 999         return 0;
1000
1001 remove:
1002         sysfs_remove_group(&pdev->dev.kobj, &compal_platform_attr_group);
1003         return err;
1004 }
1005
1006 static void compal_remove(struct platform_device *pdev)
1007 {
1008         struct compal_data *data;
1009
1010         if (!extra_features)
1011                 return;
1012
1013         pr_info("Unloading: resetting fan control to motherboard\n");
1014         pwm_disable_control();
1015
1016         data = platform_get_drvdata(pdev);
1017         power_supply_unregister(data->psy);
1018
1019         sysfs_remove_group(&pdev->dev.kobj, &compal_platform_attr_group);
1020 }
1021
1022 static struct platform_driver compal_driver = {
1023         .driver = {
1024                 .name = DRIVER_NAME,
1025         },
1026         .probe  = compal_probe,
1027         .remove_new = compal_remove,
1028 };
1029
1030 static int __init compal_init(void)
1031 {
1032         int ret;
1033
1034         if (acpi_disabled) {
1035                 pr_err("ACPI needs to be enabled for this driver to work!\n");
1036                 return -ENODEV;
1037         }
1038
1039         if (!force && !dmi_check_system(compal_dmi_table)) {
1040                 pr_err("Motherboard not recognized (You could try the module's force-parameter)\n");
1041                 return -ENODEV;
1042         }
1043
1044         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1045                 struct backlight_properties props;
1046                 memset(&props, 0, sizeof(struct backlight_properties));
1047                 props.type = BACKLIGHT_PLATFORM;
1048                 props.max_brightness = BACKLIGHT_LEVEL_MAX;
1049                 compalbl_device = backlight_device_register(DRIVER_NAME,
1050                                                             NULL, NULL,
1051                                                             &compalbl_ops,
1052                                                             &props);
1053                 if (IS_ERR(compalbl_device))
1054                         return PTR_ERR(compalbl_device);
1055         }
1056
1057         ret = platform_driver_register(&compal_driver);
1058         if (ret)
1059                 goto err_backlight;
1060
1061         compal_device = platform_device_alloc(DRIVER_NAME, PLATFORM_DEVID_NONE);
1062         if (!compal_device) {
1063                 ret = -ENOMEM;
1064                 goto err_platform_driver;
1065         }
1066
1067         ret = platform_device_add(compal_device); /* This calls compal_probe */
1068         if (ret)
1069                 goto err_platform_device;
1070
1071         ret = setup_rfkill();
1072         if (ret)
1073                 goto err_rfkill;
1074
1075         pr_info("Driver " DRIVER_VERSION " successfully loaded\n");
1076         return 0;
1077
1078 err_rfkill:
1079         platform_device_del(compal_device);
1080
1081 err_platform_device:
1082         platform_device_put(compal_device);
1083
1084 err_platform_driver:
1085         platform_driver_unregister(&compal_driver);
1086
1087 err_backlight:
1088         backlight_device_unregister(compalbl_device);
1089
1090         return ret;
1091 }
1092
1093 static void __exit compal_cleanup(void)
1094 {
1095         platform_device_unregister(compal_device);
1096         platform_driver_unregister(&compal_driver);
1097         backlight_device_unregister(compalbl_device);
1098         rfkill_unregister(wifi_rfkill);
1099         rfkill_unregister(bt_rfkill);
1100         rfkill_destroy(wifi_rfkill);
1101         rfkill_destroy(bt_rfkill);
1102
1103         pr_info("Driver unloaded\n");
1104 }
1105
1106 module_init(compal_init);
1107 module_exit(compal_cleanup);
1108
1109 MODULE_AUTHOR("Cezary Jackiewicz");
1110 MODULE_AUTHOR("Roald Frederickx <roald.frederickx@gmail.com>");
1111 MODULE_DESCRIPTION("Compal Laptop Support");
1112 MODULE_VERSION(DRIVER_VERSION);
1113 MODULE_LICENSE("GPL");