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/sysfs.h>
  72 #include <linux/fb.h>
  73 #include <acpi/video.h>
  74
  75 /* ======= */
  76 /* Defines */
  77 /* ======= */
  78 #define DRIVER_NAME "compal-laptop"
  79 #define DRIVER_VERSION  "0.2.7"
  80
  81 #define BACKLIGHT_LEVEL_ADDR            0xB9
  82 #define BACKLIGHT_LEVEL_MAX             7
  83 #define BACKLIGHT_STATE_ADDR            0x59
  84 #define BACKLIGHT_STATE_ON_DATA         0xE1
  85 #define BACKLIGHT_STATE_OFF_DATA        0xE2
  86
  87 #define WAKE_UP_ADDR                    0xA4
  88 #define WAKE_UP_PME                     (1 << 0)
  89 #define WAKE_UP_MODEM                   (1 << 1)
  90 #define WAKE_UP_LAN                     (1 << 2)
  91 #define WAKE_UP_WLAN                    (1 << 4)
  92 #define WAKE_UP_KEY                     (1 << 6)
  93 #define WAKE_UP_MOUSE                   (1 << 7)
  94
  95 #define WIRELESS_ADDR                   0xBB
  96 #define WIRELESS_WLAN                   (1 << 0)
  97 #define WIRELESS_BT                     (1 << 1)
  98 #define WIRELESS_WLAN_EXISTS            (1 << 2)
  99 #define WIRELESS_BT_EXISTS              (1 << 3)
 100 #define WIRELESS_KILLSWITCH             (1 << 4)
 101
 102 #define PWM_ADDRESS                     0x46
 103 #define PWM_DISABLE_ADDR                0x59
 104 #define PWM_DISABLE_DATA                0xA5
 105 #define PWM_ENABLE_ADDR                 0x59
 106 #define PWM_ENABLE_DATA                 0xA8
 107
 108 #define FAN_ADDRESS                     0x46
 109 #define FAN_DATA                        0x81
 110 #define FAN_FULL_ON_CMD                 0x59 /* Doesn't seem to work. Just */
 111 #define FAN_FULL_ON_ENABLE              0x76 /* force the pwm signal to its */
 112 #define FAN_FULL_ON_DISABLE             0x77 /* maximum value instead */
 113
 114 #define TEMP_CPU                        0xB0
 115 #define TEMP_CPU_LOCAL                  0xB1
 116 #define TEMP_CPU_DTS                    0xB5
 117 #define TEMP_NORTHBRIDGE                0xB6
 118 #define TEMP_VGA                        0xB4
 119 #define TEMP_SKIN                       0xB2
 120
 121 #define BAT_MANUFACTURER_NAME_ADDR      0x10
 122 #define BAT_MANUFACTURER_NAME_LEN       9
 123 #define BAT_MODEL_NAME_ADDR             0x19
 124 #define BAT_MODEL_NAME_LEN              6
 125 #define BAT_SERIAL_NUMBER_ADDR          0xC4
 126 #define BAT_SERIAL_NUMBER_LEN           5
 127 #define BAT_CHARGE_NOW                  0xC2
 128 #define BAT_CHARGE_DESIGN               0xCA
 129 #define BAT_VOLTAGE_NOW                 0xC6
 130 #define BAT_VOLTAGE_DESIGN              0xC8
 131 #define BAT_CURRENT_NOW                 0xD0
 132 #define BAT_CURRENT_AVG                 0xD2
 133 #define BAT_POWER                       0xD4
 134 #define BAT_CAPACITY                    0xCE
 135 #define BAT_TEMP                        0xD6
 136 #define BAT_TEMP_AVG                    0xD7
 137 #define BAT_STATUS0                     0xC1
 138 #define BAT_STATUS1                     0xF0
 139 #define BAT_STATUS2                     0xF1
 140 #define BAT_STOP_CHARGE1                0xF2
 141 #define BAT_STOP_CHARGE2                0xF3
 142 #define BAT_CHARGE_LIMIT                0x03
 143 #define BAT_CHARGE_LIMIT_MAX            100
 144
 145 #define BAT_S0_DISCHARGE                (1 << 0)
 146 #define BAT_S0_DISCHRG_CRITICAL         (1 << 2)
 147 #define BAT_S0_LOW                      (1 << 3)
 148 #define BAT_S0_CHARGING                 (1 << 1)
 149 #define BAT_S0_AC                       (1 << 7)
 150 #define BAT_S1_EXISTS                   (1 << 0)
 151 #define BAT_S1_FULL                     (1 << 1)
 152 #define BAT_S1_EMPTY                    (1 << 2)
 153 #define BAT_S1_LiION_OR_NiMH            (1 << 7)
 154 #define BAT_S2_LOW_LOW                  (1 << 0)
 155 #define BAT_STOP_CHRG1_BAD_CELL         (1 << 1)
 156 #define BAT_STOP_CHRG1_COMM_FAIL        (1 << 2)
 157 #define BAT_STOP_CHRG1_OVERVOLTAGE      (1 << 6)
 158 #define BAT_STOP_CHRG1_OVERTEMPERATURE  (1 << 7)
 159
 160
 161 /* ======= */
 162 /* Structs */
 163 /* ======= */
 164 struct compal_data{
 165         /* Fan control */
 166         int pwm_enable; /* 0:full on, 1:set by pwm1, 2:control by motherboard */
 167         unsigned char curr_pwm;
 168
 169         /* Power supply */
 170         struct power_supply *psy;
 171         struct power_supply_info psy_info;
 172         char bat_model_name[BAT_MODEL_NAME_LEN + 1];
 173         char bat_manufacturer_name[BAT_MANUFACTURER_NAME_LEN + 1];
 174         char bat_serial_number[BAT_SERIAL_NUMBER_LEN + 1];
 175 };
 176
 177
 178 /* =============== */
 179 /* General globals */
 180 /* =============== */
 181 static bool force;
 182 module_param(force, bool, 0);
 183 MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");
 184
 185 /* Support for the wake_on_XXX, hwmon and power_supply interface. Currently
 186  * only gets enabled on a JHL90 board. Might work with the others too */
 187 static bool extra_features;
 188
 189 /* Nasty stuff. For some reason the fan control is very un-linear.  I've
 190  * come up with these values by looping through the possible inputs and
 191  * watching the output of address 0x4F (do an ec_transaction writing 0x33
 192  * into 0x4F and read a few bytes from the output, like so:
 193  *      u8 writeData = 0x33;
 194  *      ec_transaction(0x4F, &writeData, 1, buffer, 32);
 195  * That address is labeled "fan1 table information" in the service manual.
 196  * It should be clear which value in 'buffer' changes). This seems to be
 197  * related to fan speed. It isn't a proper 'realtime' fan speed value
 198  * though, because physically stopping or speeding up the fan doesn't
 199  * change it. It might be the average voltage or current of the pwm output.
 200  * Nevertheless, it is more fine-grained than the actual RPM reading */
 201 static const unsigned char pwm_lookup_table[256] = {
 202         0, 0, 0, 1, 1, 1, 2, 253, 254, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6,
 203         7, 7, 7, 8, 86, 86, 9, 9, 9, 10, 10, 10, 11, 92, 92, 12, 12, 95,
 204         13, 66, 66, 14, 14, 98, 15, 15, 15, 16, 16, 67, 17, 17, 72, 18, 70,
 205         75, 19, 90, 90, 73, 73, 73, 21, 21, 91, 91, 91, 96, 23, 94, 94, 94,
 206         94, 94, 94, 94, 94, 94, 94, 141, 141, 238, 223, 192, 139, 139, 139,
 207         139, 139, 142, 142, 142, 142, 142, 78, 78, 78, 78, 78, 76, 76, 76,
 208         76, 76, 79, 79, 79, 79, 79, 79, 79, 20, 20, 20, 20, 20, 22, 22, 22,
 209         22, 22, 24, 24, 24, 24, 24, 24, 219, 219, 219, 219, 219, 219, 219,
 210         219, 27, 27, 188, 188, 28, 28, 28, 29, 186, 186, 186, 186, 186,
 211         186, 186, 186, 186, 186, 31, 31, 31, 31, 31, 32, 32, 32, 41, 33,
 212         33, 33, 33, 33, 252, 252, 34, 34, 34, 43, 35, 35, 35, 36, 36, 38,
 213         206, 206, 206, 206, 206, 206, 206, 206, 206, 37, 37, 37, 46, 46,
 214         47, 47, 232, 232, 232, 232, 232, 232, 232, 232, 232, 232, 48, 48,
 215         48, 48, 48, 40, 40, 40, 49, 42, 42, 42, 42, 42, 42, 42, 42, 44,
 216         189, 189, 189, 189, 54, 54, 45, 45, 45, 45, 45, 45, 45, 45, 251,
 217         191, 199, 199, 199, 199, 199, 215, 215, 215, 215, 187, 187, 187,
 218         187, 187, 193, 50
 219 };
 220
 221
 222
 223
 224 /* ========================= */
 225 /* Hardware access functions */
 226 /* ========================= */
 227 /* General access */
 228 static u8 ec_read_u8(u8 addr)
 229 {
 230         u8 value = 0;
 231         ec_read(addr, &value);
 232         return value;
 233 }
 234
 235 static s8 ec_read_s8(u8 addr)
 236 {
 237         return (s8)ec_read_u8(addr);
 238 }
 239
 240 static u16 ec_read_u16(u8 addr)
 241 {
 242         int hi, lo;
 243         lo = ec_read_u8(addr);
 244         hi = ec_read_u8(addr + 1);
 245         return (hi << 8) + lo;
 246 }
 247
 248 static s16 ec_read_s16(u8 addr)
 249 {
 250         return (s16) ec_read_u16(addr);
 251 }
 252
 253 static void ec_read_sequence(u8 addr, u8 *buf, int len)
 254 {
 255         int i;
 256         for (i = 0; i < len; i++)
 257                 ec_read(addr + i, buf + i);
 258 }
 259
 260
 261 /* Backlight access */
 262 static int set_backlight_level(int level)
 263 {
 264         if (level < 0 || level > BACKLIGHT_LEVEL_MAX)
 265                 return -EINVAL;
 266
 267         ec_write(BACKLIGHT_LEVEL_ADDR, level);
 268
 269         return 0;
 270 }
 271
 272 static int get_backlight_level(void)
 273 {
 274         return (int) ec_read_u8(BACKLIGHT_LEVEL_ADDR);
 275 }
 276
 277 static void set_backlight_state(bool on)
 278 {
 279         u8 data = on ? BACKLIGHT_STATE_ON_DATA : BACKLIGHT_STATE_OFF_DATA;
 280         ec_transaction(BACKLIGHT_STATE_ADDR, &data, 1, NULL, 0);
 281 }
 282
 283
 284 /* Fan control access */
 285 static void pwm_enable_control(void)
 286 {
 287         unsigned char writeData = PWM_ENABLE_DATA;
 288         ec_transaction(PWM_ENABLE_ADDR, &writeData, 1, NULL, 0);
 289 }
 290
 291 static void pwm_disable_control(void)
 292 {
 293         unsigned char writeData = PWM_DISABLE_DATA;
 294         ec_transaction(PWM_DISABLE_ADDR, &writeData, 1, NULL, 0);
 295 }
 296
 297 static void set_pwm(int pwm)
 298 {
 299         ec_transaction(PWM_ADDRESS, &pwm_lookup_table[pwm], 1, NULL, 0);
 300 }
 301
 302 static int get_fan_rpm(void)
 303 {
 304         u8 value, data = FAN_DATA;
 305         ec_transaction(FAN_ADDRESS, &data, 1, &value, 1);
 306         return 100 * (int)value;
 307 }
 308
 309
 310
 311
 312 /* =================== */
 313 /* Interface functions */
 314 /* =================== */
 315
 316 /* Backlight interface */
 317 static int bl_get_brightness(struct backlight_device *b)
 318 {
 319         return get_backlight_level();
 320 }
 321
 322 static int bl_update_status(struct backlight_device *b)
 323 {
 324         int ret = set_backlight_level(b->props.brightness);
 325         if (ret)
 326                 return ret;
 327
 328         set_backlight_state(!backlight_is_blank(b));
 329         return 0;
 330 }
 331
 332 static const struct backlight_ops compalbl_ops = {
 333         .get_brightness = bl_get_brightness,
 334         .update_status  = bl_update_status,
 335 };
 336
 337
 338 /* Wireless interface */
 339 static int compal_rfkill_set(void *data, bool blocked)
 340 {
 341         unsigned long radio = (unsigned long) data;
 342         u8 result = ec_read_u8(WIRELESS_ADDR);
 343         u8 value;
 344
 345         if (!blocked)
 346                 value = (u8) (result | radio);
 347         else
 348                 value = (u8) (result & ~radio);
 349         ec_write(WIRELESS_ADDR, value);
 350
 351         return 0;
 352 }
 353
 354 static void compal_rfkill_poll(struct rfkill *rfkill, void *data)
 355 {
 356         u8 result = ec_read_u8(WIRELESS_ADDR);
 357         bool hw_blocked = !(result & WIRELESS_KILLSWITCH);
 358         rfkill_set_hw_state(rfkill, hw_blocked);
 359 }
 360
 361 static const struct rfkill_ops compal_rfkill_ops = {
 362         .poll = compal_rfkill_poll,
 363         .set_block = compal_rfkill_set,
 364 };
 365
 366
 367 /* Wake_up interface */
 368 #define SIMPLE_MASKED_STORE_SHOW(NAME, ADDR, MASK)                              \
 369 static ssize_t NAME##_show(struct device *dev,                                  \
 370         struct device_attribute *attr, char *buf)                               \
 371 {                                                                               \
 372         return sysfs_emit(buf, "%d\n", ((ec_read_u8(ADDR) & MASK) != 0));       \
 373 }                                                                               \
 374 static ssize_t NAME##_store(struct device *dev,                                 \
 375         struct device_attribute *attr, const char *buf, size_t count)           \
 376 {                                                                               \
 377         int state;                                                              \
 378         u8 old_val = ec_read_u8(ADDR);                                          \
 379         if (sscanf(buf, "%d", &state) != 1 || (state < 0 || state > 1))         \
 380                 return -EINVAL;                                                 \
 381         ec_write(ADDR, state ? (old_val | MASK) : (old_val & ~MASK));           \
 382         return count;                                                           \
 383 }
 384
 385 SIMPLE_MASKED_STORE_SHOW(wake_up_pme,   WAKE_UP_ADDR, WAKE_UP_PME)
 386 SIMPLE_MASKED_STORE_SHOW(wake_up_modem, WAKE_UP_ADDR, WAKE_UP_MODEM)
 387 SIMPLE_MASKED_STORE_SHOW(wake_up_lan,   WAKE_UP_ADDR, WAKE_UP_LAN)
 388 SIMPLE_MASKED_STORE_SHOW(wake_up_wlan,  WAKE_UP_ADDR, WAKE_UP_WLAN)
 389 SIMPLE_MASKED_STORE_SHOW(wake_up_key,   WAKE_UP_ADDR, WAKE_UP_KEY)
 390 SIMPLE_MASKED_STORE_SHOW(wake_up_mouse, WAKE_UP_ADDR, WAKE_UP_MOUSE)
 391
 392 /* Fan control interface */
 393 static ssize_t pwm_enable_show(struct device *dev,
 394                 struct device_attribute *attr, char *buf)
 395 {
 396         struct compal_data *data = dev_get_drvdata(dev);
 397         return sysfs_emit(buf, "%d\n", data->pwm_enable);
 398 }
 399
 400 static ssize_t pwm_enable_store(struct device *dev,
 401                 struct device_attribute *attr, const char *buf, size_t count)
 402 {
 403         struct compal_data *data = dev_get_drvdata(dev);
 404         long val;
 405         int err;
 406
 407         err = kstrtol(buf, 10, &val);
 408         if (err)
 409                 return err;
 410         if (val < 0)
 411                 return -EINVAL;
 412
 413         data->pwm_enable = val;
 414
 415         switch (val) {
 416         case 0:  /* Full speed */
 417                 pwm_enable_control();
 418                 set_pwm(255);
 419                 break;
 420         case 1:  /* As set by pwm1 */
 421                 pwm_enable_control();
 422                 set_pwm(data->curr_pwm);
 423                 break;
 424         default: /* Control by motherboard */
 425                 pwm_disable_control();
 426                 break;
 427         }
 428
 429         return count;
 430 }
 431
 432 static ssize_t pwm_show(struct device *dev, struct device_attribute *attr,
 433                 char *buf)
 434 {
 435         struct compal_data *data = dev_get_drvdata(dev);
 436         return sysfs_emit(buf, "%hhu\n", data->curr_pwm);
 437 }
 438
 439 static ssize_t pwm_store(struct device *dev, struct device_attribute *attr,
 440                 const char *buf, size_t count)
 441 {
 442         struct compal_data *data = dev_get_drvdata(dev);
 443         long val;
 444         int err;
 445
 446         err = kstrtol(buf, 10, &val);
 447         if (err)
 448                 return err;
 449         if (val < 0 || val > 255)
 450                 return -EINVAL;
 451
 452         data->curr_pwm = val;
 453
 454         if (data->pwm_enable != 1)
 455                 return count;
 456         set_pwm(val);
 457
 458         return count;
 459 }
 460
 461 static ssize_t fan_show(struct device *dev, struct device_attribute *attr,
 462                 char *buf)
 463 {
 464         return sysfs_emit(buf, "%d\n", get_fan_rpm());
 465 }
 466
 467
 468 /* Temperature interface */
 469 #define TEMPERATURE_SHOW_TEMP_AND_LABEL(POSTFIX, ADDRESS, LABEL)                \
 470 static ssize_t temp_##POSTFIX(struct device *dev,                               \
 471                 struct device_attribute *attr, char *buf)                       \
 472 {                                                                               \
 473         return sysfs_emit(buf, "%d\n", 1000 * (int)ec_read_s8(ADDRESS));        \
 474 }                                                                               \
 475 static ssize_t label_##POSTFIX(struct device *dev,                              \
 476                 struct device_attribute *attr, char *buf)                       \
 477 {                                                                               \
 478         return sysfs_emit(buf, "%s\n", LABEL);                                  \
 479 }
 480
 481 /* Labels as in service guide */
 482 TEMPERATURE_SHOW_TEMP_AND_LABEL(cpu,        TEMP_CPU,        "CPU_TEMP");
 483 TEMPERATURE_SHOW_TEMP_AND_LABEL(cpu_local,  TEMP_CPU_LOCAL,  "CPU_TEMP_LOCAL");
 484 TEMPERATURE_SHOW_TEMP_AND_LABEL(cpu_DTS,    TEMP_CPU_DTS,    "CPU_DTS");
 485 TEMPERATURE_SHOW_TEMP_AND_LABEL(northbridge,TEMP_NORTHBRIDGE,"NorthBridge");
 486 TEMPERATURE_SHOW_TEMP_AND_LABEL(vga,        TEMP_VGA,        "VGA_TEMP");
 487 TEMPERATURE_SHOW_TEMP_AND_LABEL(SKIN,       TEMP_SKIN,       "SKIN_TEMP90");
 488
 489
 490 /* Power supply interface */
 491 static int bat_status(void)
 492 {
 493         u8 status0 = ec_read_u8(BAT_STATUS0);
 494         u8 status1 = ec_read_u8(BAT_STATUS1);
 495
 496         if (status0 & BAT_S0_CHARGING)
 497                 return POWER_SUPPLY_STATUS_CHARGING;
 498         if (status0 & BAT_S0_DISCHARGE)
 499                 return POWER_SUPPLY_STATUS_DISCHARGING;
 500         if (status1 & BAT_S1_FULL)
 501                 return POWER_SUPPLY_STATUS_FULL;
 502         return POWER_SUPPLY_STATUS_NOT_CHARGING;
 503 }
 504
 505 static int bat_health(void)
 506 {
 507         u8 status = ec_read_u8(BAT_STOP_CHARGE1);
 508
 509         if (status & BAT_STOP_CHRG1_OVERTEMPERATURE)
 510                 return POWER_SUPPLY_HEALTH_OVERHEAT;
 511         if (status & BAT_STOP_CHRG1_OVERVOLTAGE)
 512                 return POWER_SUPPLY_HEALTH_OVERVOLTAGE;
 513         if (status & BAT_STOP_CHRG1_BAD_CELL)
 514                 return POWER_SUPPLY_HEALTH_DEAD;
 515         if (status & BAT_STOP_CHRG1_COMM_FAIL)
 516                 return POWER_SUPPLY_HEALTH_UNKNOWN;
 517         return POWER_SUPPLY_HEALTH_GOOD;
 518 }
 519
 520 static int bat_is_present(void)
 521 {
 522         u8 status = ec_read_u8(BAT_STATUS2);
 523         return ((status & BAT_S1_EXISTS) != 0);
 524 }
 525
 526 static int bat_technology(void)
 527 {
 528         u8 status = ec_read_u8(BAT_STATUS1);
 529
 530         if (status & BAT_S1_LiION_OR_NiMH)
 531                 return POWER_SUPPLY_TECHNOLOGY_LION;
 532         return POWER_SUPPLY_TECHNOLOGY_NiMH;
 533 }
 534
 535 static int bat_capacity_level(void)
 536 {
 537         u8 status0 = ec_read_u8(BAT_STATUS0);
 538         u8 status1 = ec_read_u8(BAT_STATUS1);
 539         u8 status2 = ec_read_u8(BAT_STATUS2);
 540
 541         if (status0 & BAT_S0_DISCHRG_CRITICAL
 542                         || status1 & BAT_S1_EMPTY
 543                         || status2 & BAT_S2_LOW_LOW)
 544                 return POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
 545         if (status0 & BAT_S0_LOW)
 546                 return POWER_SUPPLY_CAPACITY_LEVEL_LOW;
 547         if (status1 & BAT_S1_FULL)
 548                 return POWER_SUPPLY_CAPACITY_LEVEL_FULL;
 549         return POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
 550 }
 551
 552 static int bat_get_property(struct power_supply *psy,
 553                                 enum power_supply_property psp,
 554                                 union power_supply_propval *val)
 555 {
 556         struct compal_data *data = power_supply_get_drvdata(psy);
 557
 558         switch (psp) {
 559         case POWER_SUPPLY_PROP_STATUS:
 560                 val->intval = bat_status();
 561                 break;
 562         case POWER_SUPPLY_PROP_HEALTH:
 563                 val->intval = bat_health();
 564                 break;
 565         case POWER_SUPPLY_PROP_PRESENT:
 566                 val->intval = bat_is_present();
 567                 break;
 568         case POWER_SUPPLY_PROP_TECHNOLOGY:
 569                 val->intval = bat_technology();
 570                 break;
 571         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: /* THE design voltage... */
 572                 val->intval = ec_read_u16(BAT_VOLTAGE_DESIGN) * 1000;
 573                 break;
 574         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
 575                 val->intval = ec_read_u16(BAT_VOLTAGE_NOW) * 1000;
 576                 break;
 577         case POWER_SUPPLY_PROP_CURRENT_NOW:
 578                 val->intval = ec_read_s16(BAT_CURRENT_NOW) * 1000;
 579                 break;
 580         case POWER_SUPPLY_PROP_CURRENT_AVG:
 581                 val->intval = ec_read_s16(BAT_CURRENT_AVG) * 1000;
 582                 break;
 583         case POWER_SUPPLY_PROP_POWER_NOW:
 584                 val->intval = ec_read_u8(BAT_POWER) * 1000000;
 585                 break;
 586         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
 587                 val->intval = ec_read_u16(BAT_CHARGE_DESIGN) * 1000;
 588                 break;
 589         case POWER_SUPPLY_PROP_CHARGE_NOW:
 590                 val->intval = ec_read_u16(BAT_CHARGE_NOW) * 1000;
 591                 break;
 592         case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
 593                 val->intval = ec_read_u8(BAT_CHARGE_LIMIT);
 594                 break;
 595         case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
 596                 val->intval = BAT_CHARGE_LIMIT_MAX;
 597                 break;
 598         case POWER_SUPPLY_PROP_CAPACITY:
 599                 val->intval = ec_read_u8(BAT_CAPACITY);
 600                 break;
 601         case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
 602                 val->intval = bat_capacity_level();
 603                 break;
 604         /* It smees that BAT_TEMP_AVG is a (2's complement?) value showing
 605          * the number of degrees, whereas BAT_TEMP is somewhat more
 606          * complicated. It looks like this is a negative nember with a
 607          * 100/256 divider and an offset of 222. Both were determined
 608          * experimentally by comparing BAT_TEMP and BAT_TEMP_AVG. */
 609         case POWER_SUPPLY_PROP_TEMP:
 610                 val->intval = ((222 - (int)ec_read_u8(BAT_TEMP)) * 1000) >> 8;
 611                 break;
 612         case POWER_SUPPLY_PROP_TEMP_AMBIENT: /* Ambient, Avg, ... same thing */
 613                 val->intval = ec_read_s8(BAT_TEMP_AVG) * 10;
 614                 break;
 615         /* Neither the model name nor manufacturer name work for me. */
 616         case POWER_SUPPLY_PROP_MODEL_NAME:
 617                 val->strval = data->bat_model_name;
 618                 break;
 619         case POWER_SUPPLY_PROP_MANUFACTURER:
 620                 val->strval = data->bat_manufacturer_name;
 621                 break;
 622         case POWER_SUPPLY_PROP_SERIAL_NUMBER:
 623                 val->strval = data->bat_serial_number;
 624                 break;
 625         default:
 626                 break;
 627         }
 628         return 0;
 629 }
 630
 631 static int bat_set_property(struct power_supply *psy,
 632                                 enum power_supply_property psp,
 633                                 const union power_supply_propval *val)
 634 {
 635         int level;
 636
 637         switch (psp) {
 638         case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
 639                 level = val->intval;
 640                 if (level < 0 || level > BAT_CHARGE_LIMIT_MAX)
 641                         return -EINVAL;
 642                 if (ec_write(BAT_CHARGE_LIMIT, level) < 0)
 643                         return -EIO;
 644                 break;
 645         default:
 646                 break;
 647         }
 648         return 0;
 649 }
 650
 651 static int bat_writeable_property(struct power_supply *psy,
 652                                 enum power_supply_property psp)
 653 {
 654         switch (psp) {
 655         case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
 656                 return 1;
 657         default:
 658                 return 0;
 659         }
 660 }
 661
 662
 663
 664
 665 /* ============== */
 666 /* Driver Globals */
 667 /* ============== */
 668 static DEVICE_ATTR_RW(wake_up_pme);
 669 static DEVICE_ATTR_RW(wake_up_modem);
 670 static DEVICE_ATTR_RW(wake_up_lan);
 671 static DEVICE_ATTR_RW(wake_up_wlan);
 672 static DEVICE_ATTR_RW(wake_up_key);
 673 static DEVICE_ATTR_RW(wake_up_mouse);
 674
 675 static DEVICE_ATTR(fan1_input,  S_IRUGO, fan_show,          NULL);
 676 static DEVICE_ATTR(temp1_input, S_IRUGO, temp_cpu,          NULL);
 677 static DEVICE_ATTR(temp2_input, S_IRUGO, temp_cpu_local,    NULL);
 678 static DEVICE_ATTR(temp3_input, S_IRUGO, temp_cpu_DTS,      NULL);
 679 static DEVICE_ATTR(temp4_input, S_IRUGO, temp_northbridge,  NULL);
 680 static DEVICE_ATTR(temp5_input, S_IRUGO, temp_vga,          NULL);
 681 static DEVICE_ATTR(temp6_input, S_IRUGO, temp_SKIN,         NULL);
 682 static DEVICE_ATTR(temp1_label, S_IRUGO, label_cpu,         NULL);
 683 static DEVICE_ATTR(temp2_label, S_IRUGO, label_cpu_local,   NULL);
 684 static DEVICE_ATTR(temp3_label, S_IRUGO, label_cpu_DTS,     NULL);
 685 static DEVICE_ATTR(temp4_label, S_IRUGO, label_northbridge, NULL);
 686 static DEVICE_ATTR(temp5_label, S_IRUGO, label_vga,         NULL);
 687 static DEVICE_ATTR(temp6_label, S_IRUGO, label_SKIN,        NULL);
 688 static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, pwm_show, pwm_store);
 689 static DEVICE_ATTR(pwm1_enable,
 690                    S_IRUGO | S_IWUSR, pwm_enable_show, pwm_enable_store);
 691
 692 static struct attribute *compal_platform_attrs[] = {
 693         &dev_attr_wake_up_pme.attr,
 694         &dev_attr_wake_up_modem.attr,
 695         &dev_attr_wake_up_lan.attr,
 696         &dev_attr_wake_up_wlan.attr,
 697         &dev_attr_wake_up_key.attr,
 698         &dev_attr_wake_up_mouse.attr,
 699         NULL
 700 };
 701 static const struct attribute_group compal_platform_attr_group = {
 702         .attrs = compal_platform_attrs
 703 };
 704
 705 static struct attribute *compal_hwmon_attrs[] = {
 706         &dev_attr_pwm1_enable.attr,
 707         &dev_attr_pwm1.attr,
 708         &dev_attr_fan1_input.attr,
 709         &dev_attr_temp1_input.attr,
 710         &dev_attr_temp2_input.attr,
 711         &dev_attr_temp3_input.attr,
 712         &dev_attr_temp4_input.attr,
 713         &dev_attr_temp5_input.attr,
 714         &dev_attr_temp6_input.attr,
 715         &dev_attr_temp1_label.attr,
 716         &dev_attr_temp2_label.attr,
 717         &dev_attr_temp3_label.attr,
 718         &dev_attr_temp4_label.attr,
 719         &dev_attr_temp5_label.attr,
 720         &dev_attr_temp6_label.attr,
 721         NULL
 722 };
 723 ATTRIBUTE_GROUPS(compal_hwmon);
 724
 725 static enum power_supply_property compal_bat_properties[] = {
 726         POWER_SUPPLY_PROP_STATUS,
 727         POWER_SUPPLY_PROP_HEALTH,
 728         POWER_SUPPLY_PROP_PRESENT,
 729         POWER_SUPPLY_PROP_TECHNOLOGY,
 730         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
 731         POWER_SUPPLY_PROP_VOLTAGE_NOW,
 732         POWER_SUPPLY_PROP_CURRENT_NOW,
 733         POWER_SUPPLY_PROP_CURRENT_AVG,
 734         POWER_SUPPLY_PROP_POWER_NOW,
 735         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
 736         POWER_SUPPLY_PROP_CHARGE_NOW,
 737         POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
 738         POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
 739         POWER_SUPPLY_PROP_CAPACITY,
 740         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
 741         POWER_SUPPLY_PROP_TEMP,
 742         POWER_SUPPLY_PROP_TEMP_AMBIENT,
 743         POWER_SUPPLY_PROP_MODEL_NAME,
 744         POWER_SUPPLY_PROP_MANUFACTURER,
 745         POWER_SUPPLY_PROP_SERIAL_NUMBER,
 746 };
 747
 748 static struct backlight_device *compalbl_device;
 749
 750 static struct platform_device *compal_device;
 751
 752 static struct rfkill *wifi_rfkill;
 753 static struct rfkill *bt_rfkill;
 754
 755
 756
 757
 758
 759 /* =================================== */
 760 /* Initialization & clean-up functions */
 761 /* =================================== */
 762
 763 static int dmi_check_cb(const struct dmi_system_id *id)
 764 {
 765         pr_info("Identified laptop model '%s'\n", id->ident);
 766         extra_features = false;
 767         return 1;
 768 }
 769
 770 static int dmi_check_cb_extra(const struct dmi_system_id *id)
 771 {
 772         pr_info("Identified laptop model '%s', enabling extra features\n",
 773                 id->ident);
 774         extra_features = true;
 775         return 1;
 776 }
 777
 778 static const struct dmi_system_id compal_dmi_table[] __initconst = {
 779         {
 780                 .ident = "FL90/IFL90",
 781                 .matches = {
 782                         DMI_MATCH(DMI_BOARD_NAME, "IFL90"),
 783                         DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
 784                 },
 785                 .callback = dmi_check_cb
 786         },
 787         {
 788                 .ident = "FL90/IFL90",
 789                 .matches = {
 790                         DMI_MATCH(DMI_BOARD_NAME, "IFL90"),
 791                         DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"),
 792                 },
 793                 .callback = dmi_check_cb
 794         },
 795         {
 796                 .ident = "FL91/IFL91",
 797                 .matches = {
 798                         DMI_MATCH(DMI_BOARD_NAME, "IFL91"),
 799                         DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
 800                 },
 801                 .callback = dmi_check_cb
 802         },
 803         {
 804                 .ident = "FL92/JFL92",
 805                 .matches = {
 806                         DMI_MATCH(DMI_BOARD_NAME, "JFL92"),
 807                         DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
 808                 },
 809                 .callback = dmi_check_cb
 810         },
 811         {
 812                 .ident = "FT00/IFT00",
 813                 .matches = {
 814                         DMI_MATCH(DMI_BOARD_NAME, "IFT00"),
 815                         DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
 816                 },
 817                 .callback = dmi_check_cb
 818         },
 819         {
 820                 .ident = "Dell Mini 9",
 821                 .matches = {
 822                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 823                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 910"),
 824                 },
 825                 .callback = dmi_check_cb
 826         },
 827         {
 828                 .ident = "Dell Mini 10",
 829                 .matches = {
 830                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 831                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1010"),
 832                 },
 833                 .callback = dmi_check_cb
 834         },
 835         {
 836                 .ident = "Dell Mini 10v",
 837                 .matches = {
 838                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 839                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1011"),
 840                 },
 841                 .callback = dmi_check_cb
 842         },
 843         {
 844                 .ident = "Dell Mini 1012",
 845                 .matches = {
 846                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 847                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"),
 848                 },
 849                 .callback = dmi_check_cb
 850         },
 851         {
 852                 .ident = "Dell Inspiron 11z",
 853                 .matches = {
 854                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 855                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1110"),
 856                 },
 857                 .callback = dmi_check_cb
 858         },
 859         {
 860                 .ident = "Dell Mini 12",
 861                 .matches = {
 862                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 863                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1210"),
 864                 },
 865                 .callback = dmi_check_cb
 866         },
 867         {
 868                 .ident = "JHL90",
 869                 .matches = {
 870                         DMI_MATCH(DMI_BOARD_NAME, "JHL90"),
 871                         DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"),
 872                 },
 873                 .callback = dmi_check_cb_extra
 874         },
 875         {
 876                 .ident = "KHLB2",
 877                 .matches = {
 878                         DMI_MATCH(DMI_BOARD_NAME, "KHLB2"),
 879                         DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"),
 880                 },
 881                 .callback = dmi_check_cb_extra
 882         },
 883         { }
 884 };
 885 MODULE_DEVICE_TABLE(dmi, compal_dmi_table);
 886
 887 static const struct power_supply_desc psy_bat_desc = {
 888         .name           = DRIVER_NAME,
 889         .type           = POWER_SUPPLY_TYPE_BATTERY,
 890         .properties     = compal_bat_properties,
 891         .num_properties = ARRAY_SIZE(compal_bat_properties),
 892         .get_property   = bat_get_property,
 893         .set_property   = bat_set_property,
 894         .property_is_writeable = bat_writeable_property,
 895 };
 896
 897 static void initialize_power_supply_data(struct compal_data *data)
 898 {
 899         ec_read_sequence(BAT_MANUFACTURER_NAME_ADDR,
 900                                         data->bat_manufacturer_name,
 901                                         BAT_MANUFACTURER_NAME_LEN);
 902         data->bat_manufacturer_name[BAT_MANUFACTURER_NAME_LEN] = 0;
 903
 904         ec_read_sequence(BAT_MODEL_NAME_ADDR,
 905                                         data->bat_model_name,
 906                                         BAT_MODEL_NAME_LEN);
 907         data->bat_model_name[BAT_MODEL_NAME_LEN] = 0;
 908
 909         scnprintf(data->bat_serial_number, BAT_SERIAL_NUMBER_LEN + 1, "%d",
 910                                 ec_read_u16(BAT_SERIAL_NUMBER_ADDR));
 911 }
 912
 913 static void initialize_fan_control_data(struct compal_data *data)
 914 {
 915         data->pwm_enable = 2; /* Keep motherboard in control for now */
 916         data->curr_pwm = 255; /* Try not to cause a CPU_on_fire exception
 917                                  if we take over... */
 918 }
 919
 920 static int setup_rfkill(void)
 921 {
 922         int ret;
 923
 924         wifi_rfkill = rfkill_alloc("compal-wifi", &compal_device->dev,
 925                                 RFKILL_TYPE_WLAN, &compal_rfkill_ops,
 926                                 (void *) WIRELESS_WLAN);
 927         if (!wifi_rfkill)
 928                 return -ENOMEM;
 929
 930         ret = rfkill_register(wifi_rfkill);
 931         if (ret)
 932                 goto err_wifi;
 933
 934         bt_rfkill = rfkill_alloc("compal-bluetooth", &compal_device->dev,
 935                                 RFKILL_TYPE_BLUETOOTH, &compal_rfkill_ops,
 936                                 (void *) WIRELESS_BT);
 937         if (!bt_rfkill) {
 938                 ret = -ENOMEM;
 939                 goto err_allocate_bt;
 940         }
 941         ret = rfkill_register(bt_rfkill);
 942         if (ret)
 943                 goto err_register_bt;
 944
 945         return 0;
 946
 947 err_register_bt:
 948         rfkill_destroy(bt_rfkill);
 949
 950 err_allocate_bt:
 951         rfkill_unregister(wifi_rfkill);
 952
 953 err_wifi:
 954         rfkill_destroy(wifi_rfkill);
 955
 956         return ret;
 957 }
 958
 959 static int compal_probe(struct platform_device *pdev)
 960 {
 961         int err;
 962         struct compal_data *data;
 963         struct device *hwmon_dev;
 964         struct power_supply_config psy_cfg = {};
 965
 966         if (!extra_features)
 967                 return 0;
 968
 969         /* Fan control */
 970         data = devm_kzalloc(&pdev->dev, sizeof(struct compal_data), GFP_KERNEL);
 971         if (!data)
 972                 return -ENOMEM;
 973
 974         initialize_fan_control_data(data);
 975
 976         err = sysfs_create_group(&pdev->dev.kobj, &compal_platform_attr_group);
 977         if (err)
 978                 return err;
 979
 980         hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev,
 981                                                            "compal", data,
 982                                                            compal_hwmon_groups);
 983         if (IS_ERR(hwmon_dev)) {
 984                 err = PTR_ERR(hwmon_dev);
 985                 goto remove;
 986         }
 987
 988         /* Power supply */
 989         initialize_power_supply_data(data);
 990         psy_cfg.drv_data = data;
 991         data->psy = power_supply_register(&compal_device->dev, &psy_bat_desc,
 992                                           &psy_cfg);
 993         if (IS_ERR(data->psy)) {
 994                 err = PTR_ERR(data->psy);
 995                 goto remove;
 996         }
 997
 998         platform_set_drvdata(pdev, data);
 999
1000         return 0;
1001
1002 remove:
1003         sysfs_remove_group(&pdev->dev.kobj, &compal_platform_attr_group);
1004         return err;
1005 }
1006
1007 static void compal_remove(struct platform_device *pdev)
1008 {
1009         struct compal_data *data;
1010
1011         if (!extra_features)
1012                 return;
1013
1014         pr_info("Unloading: resetting fan control to motherboard\n");
1015         pwm_disable_control();
1016
1017         data = platform_get_drvdata(pdev);
1018         power_supply_unregister(data->psy);
1019
1020         sysfs_remove_group(&pdev->dev.kobj, &compal_platform_attr_group);
1021 }
1022
1023 static struct platform_driver compal_driver = {
1024         .driver = {
1025                 .name = DRIVER_NAME,
1026         },
1027         .probe = compal_probe,
1028         .remove = compal_remove,
1029 };
1030
1031 static int __init compal_init(void)
1032 {
1033         int ret;
1034
1035         if (acpi_disabled) {
1036                 pr_err("ACPI needs to be enabled for this driver to work!\n");
1037                 return -ENODEV;
1038         }
1039
1040         if (!force && !dmi_check_system(compal_dmi_table)) {
1041                 pr_err("Motherboard not recognized (You could try the module's force-parameter)\n");
1042                 return -ENODEV;
1043         }
1044
1045         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1046                 struct backlight_properties props;
1047                 memset(&props, 0, sizeof(struct backlight_properties));
1048                 props.type = BACKLIGHT_PLATFORM;
1049                 props.max_brightness = BACKLIGHT_LEVEL_MAX;
1050                 compalbl_device = backlight_device_register(DRIVER_NAME,
1051                                                             NULL, NULL,
1052                                                             &compalbl_ops,
1053                                                             &props);
1054                 if (IS_ERR(compalbl_device))
1055                         return PTR_ERR(compalbl_device);
1056         }
1057
1058         ret = platform_driver_register(&compal_driver);
1059         if (ret)
1060                 goto err_backlight;
1061
1062         compal_device = platform_device_alloc(DRIVER_NAME, PLATFORM_DEVID_NONE);
1063         if (!compal_device) {
1064                 ret = -ENOMEM;
1065                 goto err_platform_driver;
1066         }
1067
1068         ret = platform_device_add(compal_device); /* This calls compal_probe */
1069         if (ret)
1070                 goto err_platform_device;
1071
1072         ret = setup_rfkill();
1073         if (ret)
1074                 goto err_rfkill;
1075
1076         pr_info("Driver " DRIVER_VERSION " successfully loaded\n");
1077         return 0;
1078
1079 err_rfkill:
1080         platform_device_del(compal_device);
1081
1082 err_platform_device:
1083         platform_device_put(compal_device);
1084
1085 err_platform_driver:
1086         platform_driver_unregister(&compal_driver);
1087
1088 err_backlight:
1089         backlight_device_unregister(compalbl_device);
1090
1091         return ret;
1092 }
1093
1094 static void __exit compal_cleanup(void)
1095 {
1096         platform_device_unregister(compal_device);
1097         platform_driver_unregister(&compal_driver);
1098         backlight_device_unregister(compalbl_device);
1099         rfkill_unregister(wifi_rfkill);
1100         rfkill_unregister(bt_rfkill);
1101         rfkill_destroy(wifi_rfkill);
1102         rfkill_destroy(bt_rfkill);
1103
1104         pr_info("Driver unloaded\n");
1105 }
1106
1107 module_init(compal_init);
1108 module_exit(compal_cleanup);
1109
1110 MODULE_AUTHOR("Cezary Jackiewicz");
1111 MODULE_AUTHOR("Roald Frederickx <roald.frederickx@gmail.com>");
1112 MODULE_DESCRIPTION("Compal Laptop Support");
1113 MODULE_VERSION(DRIVER_VERSION);
1114 MODULE_LICENSE("GPL");