Version:  2.0.40 2.2.26 2.4.37 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8

Linux/drivers/platform/x86/compal-laptop.c

  1 /*-*-linux-c-*-*/
  2 
  3 /*
  4   Copyright (C) 2008 Cezary Jackiewicz <cezary.jackiewicz (at) gmail.com>
  5 
  6   based on MSI driver
  7 
  8   Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de>
  9 
 10   This program is free software; you can redistribute it and/or modify
 11   it under the terms of the GNU General Public License as published by
 12   the Free Software Foundation; either version 2 of the License, or
 13   (at your option) any later version.
 14 
 15   This program is distributed in the hope that it will be useful, but
 16   WITHOUT ANY WARRANTY; without even the implied warranty of
 17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 18   General Public License for more details.
 19 
 20   You should have received a copy of the GNU General Public License
 21   along with this program; if not, write to the Free Software
 22   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 23   02110-1301, USA.
 24  */
 25 
 26 /*
 27  * compal-laptop.c - Compal laptop support.
 28  *
 29  * This driver exports a few files in /sys/devices/platform/compal-laptop/:
 30  *   wake_up_XXX   Whether or not we listen to such wake up events (rw)
 31  *
 32  * In addition to these platform device attributes the driver
 33  * registers itself in the Linux backlight control, power_supply, rfkill
 34  * and hwmon subsystem and is available to userspace under:
 35  *
 36  *   /sys/class/backlight/compal-laptop/
 37  *   /sys/class/power_supply/compal-laptop/
 38  *   /sys/class/rfkill/rfkillX/
 39  *   /sys/class/hwmon/hwmonX/
 40  *
 41  * Notes on the power_supply battery interface:
 42  *   - the "minimum" design voltage is *the* design voltage
 43  *   - the ambient temperature is the average battery temperature
 44  *     and the value is an educated guess (see commented code below)
 45  *
 46  *
 47  * This driver might work on other laptops produced by Compal. If you
 48  * want to try it you can pass force=1 as argument to the module which
 49  * will force it to load even when the DMI data doesn't identify the
 50  * laptop as compatible.
 51  *
 52  * Lots of data available at:
 53  * http://service1.marasst.com/Compal/JHL90_91/Service%20Manual/
 54  * JHL90%20service%20manual-Final-0725.pdf
 55  *
 56  *
 57  *
 58  * Support for the Compal JHL90 added by Roald Frederickx
 59  * (roald.frederickx@gmail.com):
 60  * Driver got large revision. Added functionalities: backlight
 61  * power, wake_on_XXX, a hwmon and power_supply interface.
 62  *
 63  * In case this gets merged into the kernel source: I want to dedicate this
 64  * to Kasper Meerts, the awesome guy who showed me Linux and C!
 65  */
 66 
 67 /* NOTE: currently the wake_on_XXX, hwmon and power_supply interfaces are
 68  * only enabled on a JHL90 board until it is verified that they work on the
 69  * other boards too.  See the extra_features variable. */
 70 
 71 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 72 
 73 #include <linux/module.h>
 74 #include <linux/kernel.h>
 75 #include <linux/init.h>
 76 #include <linux/acpi.h>
 77 #include <linux/dmi.h>
 78 #include <linux/backlight.h>
 79 #include <linux/platform_device.h>
 80 #include <linux/rfkill.h>
 81 #include <linux/hwmon.h>
 82 #include <linux/hwmon-sysfs.h>
 83 #include <linux/power_supply.h>
 84 #include <linux/fb.h>
 85 #include <acpi/video.h>
 86 
 87 /* ======= */
 88 /* Defines */
 89 /* ======= */
 90 #define DRIVER_NAME "compal-laptop"
 91 #define DRIVER_VERSION  "0.2.7"
 92 
 93 #define BACKLIGHT_LEVEL_ADDR            0xB9
 94 #define BACKLIGHT_LEVEL_MAX             7
 95 #define BACKLIGHT_STATE_ADDR            0x59
 96 #define BACKLIGHT_STATE_ON_DATA         0xE1
 97 #define BACKLIGHT_STATE_OFF_DATA        0xE2
 98 
 99 #define WAKE_UP_ADDR                    0xA4
100 #define WAKE_UP_PME                     (1 << 0)
101 #define WAKE_UP_MODEM                   (1 << 1)
102 #define WAKE_UP_LAN                     (1 << 2)
103 #define WAKE_UP_WLAN                    (1 << 4)
104 #define WAKE_UP_KEY                     (1 << 6)
105 #define WAKE_UP_MOUSE                   (1 << 7)
106 
107 #define WIRELESS_ADDR                   0xBB
108 #define WIRELESS_WLAN                   (1 << 0)
109 #define WIRELESS_BT                     (1 << 1)
110 #define WIRELESS_WLAN_EXISTS            (1 << 2)
111 #define WIRELESS_BT_EXISTS              (1 << 3)
112 #define WIRELESS_KILLSWITCH             (1 << 4)
113 
114 #define PWM_ADDRESS                     0x46
115 #define PWM_DISABLE_ADDR                0x59
116 #define PWM_DISABLE_DATA                0xA5
117 #define PWM_ENABLE_ADDR                 0x59
118 #define PWM_ENABLE_DATA                 0xA8
119 
120 #define FAN_ADDRESS                     0x46
121 #define FAN_DATA                        0x81
122 #define FAN_FULL_ON_CMD                 0x59 /* Doesn't seem to work. Just */
123 #define FAN_FULL_ON_ENABLE              0x76 /* force the pwm signal to its */
124 #define FAN_FULL_ON_DISABLE             0x77 /* maximum value instead */
125 
126 #define TEMP_CPU                        0xB0
127 #define TEMP_CPU_LOCAL                  0xB1
128 #define TEMP_CPU_DTS                    0xB5
129 #define TEMP_NORTHBRIDGE                0xB6
130 #define TEMP_VGA                        0xB4
131 #define TEMP_SKIN                       0xB2
132 
133 #define BAT_MANUFACTURER_NAME_ADDR      0x10
134 #define BAT_MANUFACTURER_NAME_LEN       9
135 #define BAT_MODEL_NAME_ADDR             0x19
136 #define BAT_MODEL_NAME_LEN              6
137 #define BAT_SERIAL_NUMBER_ADDR          0xC4
138 #define BAT_SERIAL_NUMBER_LEN           5
139 #define BAT_CHARGE_NOW                  0xC2
140 #define BAT_CHARGE_DESIGN               0xCA
141 #define BAT_VOLTAGE_NOW                 0xC6
142 #define BAT_VOLTAGE_DESIGN              0xC8
143 #define BAT_CURRENT_NOW                 0xD0
144 #define BAT_CURRENT_AVG                 0xD2
145 #define BAT_POWER                       0xD4
146 #define BAT_CAPACITY                    0xCE
147 #define BAT_TEMP                        0xD6
148 #define BAT_TEMP_AVG                    0xD7
149 #define BAT_STATUS0                     0xC1
150 #define BAT_STATUS1                     0xF0
151 #define BAT_STATUS2                     0xF1
152 #define BAT_STOP_CHARGE1                0xF2
153 #define BAT_STOP_CHARGE2                0xF3
154 #define BAT_CHARGE_LIMIT                0x03
155 #define BAT_CHARGE_LIMIT_MAX            100
156 
157 #define BAT_S0_DISCHARGE                (1 << 0)
158 #define BAT_S0_DISCHRG_CRITICAL         (1 << 2)
159 #define BAT_S0_LOW                      (1 << 3)
160 #define BAT_S0_CHARGING                 (1 << 1)
161 #define BAT_S0_AC                       (1 << 7)
162 #define BAT_S1_EXISTS                   (1 << 0)
163 #define BAT_S1_FULL                     (1 << 1)
164 #define BAT_S1_EMPTY                    (1 << 2)
165 #define BAT_S1_LiION_OR_NiMH            (1 << 7)
166 #define BAT_S2_LOW_LOW                  (1 << 0)
167 #define BAT_STOP_CHRG1_BAD_CELL         (1 << 1)
168 #define BAT_STOP_CHRG1_COMM_FAIL        (1 << 2)
169 #define BAT_STOP_CHRG1_OVERVOLTAGE      (1 << 6)
170 #define BAT_STOP_CHRG1_OVERTEMPERATURE  (1 << 7)
171 
172 
173 /* ======= */
174 /* Structs */
175 /* ======= */
176 struct compal_data{
177         /* Fan control */
178         int pwm_enable; /* 0:full on, 1:set by pwm1, 2:control by motherboard */
179         unsigned char curr_pwm;
180 
181         /* Power supply */
182         struct power_supply *psy;
183         struct power_supply_info psy_info;
184         char bat_model_name[BAT_MODEL_NAME_LEN + 1];
185         char bat_manufacturer_name[BAT_MANUFACTURER_NAME_LEN + 1];
186         char bat_serial_number[BAT_SERIAL_NUMBER_LEN + 1];
187 };
188 
189 
190 /* =============== */
191 /* General globals */
192 /* =============== */
193 static bool force;
194 module_param(force, bool, 0);
195 MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");
196 
197 /* Support for the wake_on_XXX, hwmon and power_supply interface. Currently
198  * only gets enabled on a JHL90 board. Might work with the others too */
199 static bool extra_features;
200 
201 /* Nasty stuff. For some reason the fan control is very un-linear.  I've
202  * come up with these values by looping through the possible inputs and
203  * watching the output of address 0x4F (do an ec_transaction writing 0x33
204  * into 0x4F and read a few bytes from the output, like so:
205  *      u8 writeData = 0x33;
206  *      ec_transaction(0x4F, &writeData, 1, buffer, 32);
207  * That address is labeled "fan1 table information" in the service manual.
208  * It should be clear which value in 'buffer' changes). This seems to be
209  * related to fan speed. It isn't a proper 'realtime' fan speed value
210  * though, because physically stopping or speeding up the fan doesn't
211  * change it. It might be the average voltage or current of the pwm output.
212  * Nevertheless, it is more fine-grained than the actual RPM reading */
213 static const unsigned char pwm_lookup_table[256] = {
214         0, 0, 0, 1, 1, 1, 2, 253, 254, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6,
215         7, 7, 7, 8, 86, 86, 9, 9, 9, 10, 10, 10, 11, 92, 92, 12, 12, 95,
216         13, 66, 66, 14, 14, 98, 15, 15, 15, 16, 16, 67, 17, 17, 72, 18, 70,
217         75, 19, 90, 90, 73, 73, 73, 21, 21, 91, 91, 91, 96, 23, 94, 94, 94,
218         94, 94, 94, 94, 94, 94, 94, 141, 141, 238, 223, 192, 139, 139, 139,
219         139, 139, 142, 142, 142, 142, 142, 78, 78, 78, 78, 78, 76, 76, 76,
220         76, 76, 79, 79, 79, 79, 79, 79, 79, 20, 20, 20, 20, 20, 22, 22, 22,
221         22, 22, 24, 24, 24, 24, 24, 24, 219, 219, 219, 219, 219, 219, 219,
222         219, 27, 27, 188, 188, 28, 28, 28, 29, 186, 186, 186, 186, 186,
223         186, 186, 186, 186, 186, 31, 31, 31, 31, 31, 32, 32, 32, 41, 33,
224         33, 33, 33, 33, 252, 252, 34, 34, 34, 43, 35, 35, 35, 36, 36, 38,
225         206, 206, 206, 206, 206, 206, 206, 206, 206, 37, 37, 37, 46, 46,
226         47, 47, 232, 232, 232, 232, 232, 232, 232, 232, 232, 232, 48, 48,
227         48, 48, 48, 40, 40, 40, 49, 42, 42, 42, 42, 42, 42, 42, 42, 44,
228         189, 189, 189, 189, 54, 54, 45, 45, 45, 45, 45, 45, 45, 45, 251,
229         191, 199, 199, 199, 199, 199, 215, 215, 215, 215, 187, 187, 187,
230         187, 187, 193, 50
231 };
232 
233 
234 
235 
236 /* ========================= */
237 /* Hardware access functions */
238 /* ========================= */
239 /* General access */
240 static u8 ec_read_u8(u8 addr)
241 {
242         u8 value;
243         ec_read(addr, &value);
244         return value;
245 }
246 
247 static s8 ec_read_s8(u8 addr)
248 {
249         return (s8)ec_read_u8(addr);
250 }
251 
252 static u16 ec_read_u16(u8 addr)
253 {
254         int hi, lo;
255         lo = ec_read_u8(addr);
256         hi = ec_read_u8(addr + 1);
257         return (hi << 8) + lo;
258 }
259 
260 static s16 ec_read_s16(u8 addr)
261 {
262         return (s16) ec_read_u16(addr);
263 }
264 
265 static void ec_read_sequence(u8 addr, u8 *buf, int len)
266 {
267         int i;
268         for (i = 0; i < len; i++)
269                 ec_read(addr + i, buf + i);
270 }
271 
272 
273 /* Backlight access */
274 static int set_backlight_level(int level)
275 {
276         if (level < 0 || level > BACKLIGHT_LEVEL_MAX)
277                 return -EINVAL;
278 
279         ec_write(BACKLIGHT_LEVEL_ADDR, level);
280 
281         return 0;
282 }
283 
284 static int get_backlight_level(void)
285 {
286         return (int) ec_read_u8(BACKLIGHT_LEVEL_ADDR);
287 }
288 
289 static void set_backlight_state(bool on)
290 {
291         u8 data = on ? BACKLIGHT_STATE_ON_DATA : BACKLIGHT_STATE_OFF_DATA;
292         ec_transaction(BACKLIGHT_STATE_ADDR, &data, 1, NULL, 0);
293 }
294 
295 
296 /* Fan control access */
297 static void pwm_enable_control(void)
298 {
299         unsigned char writeData = PWM_ENABLE_DATA;
300         ec_transaction(PWM_ENABLE_ADDR, &writeData, 1, NULL, 0);
301 }
302 
303 static void pwm_disable_control(void)
304 {
305         unsigned char writeData = PWM_DISABLE_DATA;
306         ec_transaction(PWM_DISABLE_ADDR, &writeData, 1, NULL, 0);
307 }
308 
309 static void set_pwm(int pwm)
310 {
311         ec_transaction(PWM_ADDRESS, &pwm_lookup_table[pwm], 1, NULL, 0);
312 }
313 
314 static int get_fan_rpm(void)
315 {
316         u8 value, data = FAN_DATA;
317         ec_transaction(FAN_ADDRESS, &data, 1, &value, 1);
318         return 100 * (int)value;
319 }
320 
321 
322 
323 
324 /* =================== */
325 /* Interface functions */
326 /* =================== */
327 
328 /* Backlight interface */
329 static int bl_get_brightness(struct backlight_device *b)
330 {
331         return get_backlight_level();
332 }
333 
334 static int bl_update_status(struct backlight_device *b)
335 {
336         int ret = set_backlight_level(b->props.brightness);
337         if (ret)
338                 return ret;
339 
340         set_backlight_state((b->props.power == FB_BLANK_UNBLANK)
341                 &&    !(b->props.state & BL_CORE_SUSPENDED)
342                 &&    !(b->props.state & BL_CORE_FBBLANK));
343         return 0;
344 }
345 
346 static const struct backlight_ops compalbl_ops = {
347         .get_brightness = bl_get_brightness,
348         .update_status  = bl_update_status,
349 };
350 
351 
352 /* Wireless interface */
353 static int compal_rfkill_set(void *data, bool blocked)
354 {
355         unsigned long radio = (unsigned long) data;
356         u8 result = ec_read_u8(WIRELESS_ADDR);
357         u8 value;
358 
359         if (!blocked)
360                 value = (u8) (result | radio);
361         else
362                 value = (u8) (result & ~radio);
363         ec_write(WIRELESS_ADDR, value);
364 
365         return 0;
366 }
367 
368 static void compal_rfkill_poll(struct rfkill *rfkill, void *data)
369 {
370         u8 result = ec_read_u8(WIRELESS_ADDR);
371         bool hw_blocked = !(result & WIRELESS_KILLSWITCH);
372         rfkill_set_hw_state(rfkill, hw_blocked);
373 }
374 
375 static const struct rfkill_ops compal_rfkill_ops = {
376         .poll = compal_rfkill_poll,
377         .set_block = compal_rfkill_set,
378 };
379 
380 
381 /* Wake_up interface */
382 #define SIMPLE_MASKED_STORE_SHOW(NAME, ADDR, MASK)                      \
383 static ssize_t NAME##_show(struct device *dev,                          \
384         struct device_attribute *attr, char *buf)                       \
385 {                                                                       \
386         return sprintf(buf, "%d\n", ((ec_read_u8(ADDR) & MASK) != 0));  \
387 }                                                                       \
388 static ssize_t NAME##_store(struct device *dev,                         \
389         struct device_attribute *attr, const char *buf, size_t count)   \
390 {                                                                       \
391         int state;                                                      \
392         u8 old_val = ec_read_u8(ADDR);                                  \
393         if (sscanf(buf, "%d", &state) != 1 || (state < 0 || state > 1)) \
394                 return -EINVAL;                                         \
395         ec_write(ADDR, state ? (old_val | MASK) : (old_val & ~MASK));   \
396         return count;                                                   \
397 }
398 
399 SIMPLE_MASKED_STORE_SHOW(wake_up_pme,   WAKE_UP_ADDR, WAKE_UP_PME)
400 SIMPLE_MASKED_STORE_SHOW(wake_up_modem, WAKE_UP_ADDR, WAKE_UP_MODEM)
401 SIMPLE_MASKED_STORE_SHOW(wake_up_lan,   WAKE_UP_ADDR, WAKE_UP_LAN)
402 SIMPLE_MASKED_STORE_SHOW(wake_up_wlan,  WAKE_UP_ADDR, WAKE_UP_WLAN)
403 SIMPLE_MASKED_STORE_SHOW(wake_up_key,   WAKE_UP_ADDR, WAKE_UP_KEY)
404 SIMPLE_MASKED_STORE_SHOW(wake_up_mouse, WAKE_UP_ADDR, WAKE_UP_MOUSE)
405 
406 /* Fan control interface */
407 static ssize_t pwm_enable_show(struct device *dev,
408                 struct device_attribute *attr, char *buf)
409 {
410         struct compal_data *data = dev_get_drvdata(dev);
411         return sprintf(buf, "%d\n", data->pwm_enable);
412 }
413 
414 static ssize_t pwm_enable_store(struct device *dev,
415                 struct device_attribute *attr, const char *buf, size_t count)
416 {
417         struct compal_data *data = dev_get_drvdata(dev);
418         long val;
419         int err;
420 
421         err = kstrtol(buf, 10, &val);
422         if (err)
423                 return err;
424         if (val < 0)
425                 return -EINVAL;
426 
427         data->pwm_enable = val;
428 
429         switch (val) {
430         case 0:  /* Full speed */
431                 pwm_enable_control();
432                 set_pwm(255);
433                 break;
434         case 1:  /* As set by pwm1 */
435                 pwm_enable_control();
436                 set_pwm(data->curr_pwm);
437                 break;
438         default: /* Control by motherboard */
439                 pwm_disable_control();
440                 break;
441         }
442 
443         return count;
444 }
445 
446 static ssize_t pwm_show(struct device *dev, struct device_attribute *attr,
447                 char *buf)
448 {
449         struct compal_data *data = dev_get_drvdata(dev);
450         return sprintf(buf, "%hhu\n", data->curr_pwm);
451 }
452 
453 static ssize_t pwm_store(struct device *dev, struct device_attribute *attr,
454                 const char *buf, size_t count)
455 {
456         struct compal_data *data = dev_get_drvdata(dev);
457         long val;
458         int err;
459 
460         err = kstrtol(buf, 10, &val);
461         if (err)
462                 return err;
463         if (val < 0 || val > 255)
464                 return -EINVAL;
465 
466         data->curr_pwm = val;
467 
468         if (data->pwm_enable != 1)
469                 return count;
470         set_pwm(val);
471 
472         return count;
473 }
474 
475 static ssize_t fan_show(struct device *dev, struct device_attribute *attr,
476                 char *buf)
477 {
478         return sprintf(buf, "%d\n", get_fan_rpm());
479 }
480 
481 
482 /* Temperature interface */
483 #define TEMPERATURE_SHOW_TEMP_AND_LABEL(POSTFIX, ADDRESS, LABEL)        \
484 static ssize_t temp_##POSTFIX(struct device *dev,                       \
485                 struct device_attribute *attr, char *buf)               \
486 {                                                                       \
487         return sprintf(buf, "%d\n", 1000 * (int)ec_read_s8(ADDRESS));   \
488 }                                                                       \
489 static ssize_t label_##POSTFIX(struct device *dev,                      \
490                 struct device_attribute *attr, char *buf)               \
491 {                                                                       \
492         return sprintf(buf, "%s\n", LABEL);                             \
493 }
494 
495 /* Labels as in service guide */
496 TEMPERATURE_SHOW_TEMP_AND_LABEL(cpu,        TEMP_CPU,        "CPU_TEMP");
497 TEMPERATURE_SHOW_TEMP_AND_LABEL(cpu_local,  TEMP_CPU_LOCAL,  "CPU_TEMP_LOCAL");
498 TEMPERATURE_SHOW_TEMP_AND_LABEL(cpu_DTS,    TEMP_CPU_DTS,    "CPU_DTS");
499 TEMPERATURE_SHOW_TEMP_AND_LABEL(northbridge,TEMP_NORTHBRIDGE,"NorthBridge");
500 TEMPERATURE_SHOW_TEMP_AND_LABEL(vga,        TEMP_VGA,        "VGA_TEMP");
501 TEMPERATURE_SHOW_TEMP_AND_LABEL(SKIN,       TEMP_SKIN,       "SKIN_TEMP90");
502 
503 
504 /* Power supply interface */
505 static int bat_status(void)
506 {
507         u8 status0 = ec_read_u8(BAT_STATUS0);
508         u8 status1 = ec_read_u8(BAT_STATUS1);
509 
510         if (status0 & BAT_S0_CHARGING)
511                 return POWER_SUPPLY_STATUS_CHARGING;
512         if (status0 & BAT_S0_DISCHARGE)
513                 return POWER_SUPPLY_STATUS_DISCHARGING;
514         if (status1 & BAT_S1_FULL)
515                 return POWER_SUPPLY_STATUS_FULL;
516         return POWER_SUPPLY_STATUS_NOT_CHARGING;
517 }
518 
519 static int bat_health(void)
520 {
521         u8 status = ec_read_u8(BAT_STOP_CHARGE1);
522 
523         if (status & BAT_STOP_CHRG1_OVERTEMPERATURE)
524                 return POWER_SUPPLY_HEALTH_OVERHEAT;
525         if (status & BAT_STOP_CHRG1_OVERVOLTAGE)
526                 return POWER_SUPPLY_HEALTH_OVERVOLTAGE;
527         if (status & BAT_STOP_CHRG1_BAD_CELL)
528                 return POWER_SUPPLY_HEALTH_DEAD;
529         if (status & BAT_STOP_CHRG1_COMM_FAIL)
530                 return POWER_SUPPLY_HEALTH_UNKNOWN;
531         return POWER_SUPPLY_HEALTH_GOOD;
532 }
533 
534 static int bat_is_present(void)
535 {
536         u8 status = ec_read_u8(BAT_STATUS2);
537         return ((status & BAT_S1_EXISTS) != 0);
538 }
539 
540 static int bat_technology(void)
541 {
542         u8 status = ec_read_u8(BAT_STATUS1);
543 
544         if (status & BAT_S1_LiION_OR_NiMH)
545                 return POWER_SUPPLY_TECHNOLOGY_LION;
546         return POWER_SUPPLY_TECHNOLOGY_NiMH;
547 }
548 
549 static int bat_capacity_level(void)
550 {
551         u8 status0 = ec_read_u8(BAT_STATUS0);
552         u8 status1 = ec_read_u8(BAT_STATUS1);
553         u8 status2 = ec_read_u8(BAT_STATUS2);
554 
555         if (status0 & BAT_S0_DISCHRG_CRITICAL
556                         || status1 & BAT_S1_EMPTY
557                         || status2 & BAT_S2_LOW_LOW)
558                 return POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
559         if (status0 & BAT_S0_LOW)
560                 return POWER_SUPPLY_CAPACITY_LEVEL_LOW;
561         if (status1 & BAT_S1_FULL)
562                 return POWER_SUPPLY_CAPACITY_LEVEL_FULL;
563         return POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
564 }
565 
566 static int bat_get_property(struct power_supply *psy,
567                                 enum power_supply_property psp,
568                                 union power_supply_propval *val)
569 {
570         struct compal_data *data = power_supply_get_drvdata(psy);
571 
572         switch (psp) {
573         case POWER_SUPPLY_PROP_STATUS:
574                 val->intval = bat_status();
575                 break;
576         case POWER_SUPPLY_PROP_HEALTH:
577                 val->intval = bat_health();
578                 break;
579         case POWER_SUPPLY_PROP_PRESENT:
580                 val->intval = bat_is_present();
581                 break;
582         case POWER_SUPPLY_PROP_TECHNOLOGY:
583                 val->intval = bat_technology();
584                 break;
585         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: /* THE design voltage... */
586                 val->intval = ec_read_u16(BAT_VOLTAGE_DESIGN) * 1000;
587                 break;
588         case POWER_SUPPLY_PROP_VOLTAGE_NOW:
589                 val->intval = ec_read_u16(BAT_VOLTAGE_NOW) * 1000;
590                 break;
591         case POWER_SUPPLY_PROP_CURRENT_NOW:
592                 val->intval = ec_read_s16(BAT_CURRENT_NOW) * 1000;
593                 break;
594         case POWER_SUPPLY_PROP_CURRENT_AVG:
595                 val->intval = ec_read_s16(BAT_CURRENT_AVG) * 1000;
596                 break;
597         case POWER_SUPPLY_PROP_POWER_NOW:
598                 val->intval = ec_read_u8(BAT_POWER) * 1000000;
599                 break;
600         case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
601                 val->intval = ec_read_u16(BAT_CHARGE_DESIGN) * 1000;
602                 break;
603         case POWER_SUPPLY_PROP_CHARGE_NOW:
604                 val->intval = ec_read_u16(BAT_CHARGE_NOW) * 1000;
605                 break;
606         case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
607                 val->intval = ec_read_u8(BAT_CHARGE_LIMIT);
608                 break;
609         case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
610                 val->intval = BAT_CHARGE_LIMIT_MAX;
611                 break;
612         case POWER_SUPPLY_PROP_CAPACITY:
613                 val->intval = ec_read_u8(BAT_CAPACITY);
614                 break;
615         case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
616                 val->intval = bat_capacity_level();
617                 break;
618         /* It smees that BAT_TEMP_AVG is a (2's complement?) value showing
619          * the number of degrees, whereas BAT_TEMP is somewhat more
620          * complicated. It looks like this is a negative nember with a
621          * 100/256 divider and an offset of 222. Both were determined
622          * experimentally by comparing BAT_TEMP and BAT_TEMP_AVG. */
623         case POWER_SUPPLY_PROP_TEMP:
624                 val->intval = ((222 - (int)ec_read_u8(BAT_TEMP)) * 1000) >> 8;
625                 break;
626         case POWER_SUPPLY_PROP_TEMP_AMBIENT: /* Ambient, Avg, ... same thing */
627                 val->intval = ec_read_s8(BAT_TEMP_AVG) * 10;
628                 break;
629         /* Neither the model name nor manufacturer name work for me. */
630         case POWER_SUPPLY_PROP_MODEL_NAME:
631                 val->strval = data->bat_model_name;
632                 break;
633         case POWER_SUPPLY_PROP_MANUFACTURER:
634                 val->strval = data->bat_manufacturer_name;
635                 break;
636         case POWER_SUPPLY_PROP_SERIAL_NUMBER:
637                 val->strval = data->bat_serial_number;
638                 break;
639         default:
640                 break;
641         }
642         return 0;
643 }
644 
645 static int bat_set_property(struct power_supply *psy,
646                                 enum power_supply_property psp,
647                                 const union power_supply_propval *val)
648 {
649         int level;
650 
651         switch (psp) {
652         case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
653                 level = val->intval;
654                 if (level < 0 || level > BAT_CHARGE_LIMIT_MAX)
655                         return -EINVAL;
656                 if (ec_write(BAT_CHARGE_LIMIT, level) < 0)
657                         return -EIO;
658                 break;
659         default:
660                 break;
661         }
662         return 0;
663 }
664 
665 static int bat_writeable_property(struct power_supply *psy,
666                                 enum power_supply_property psp)
667 {
668         switch (psp) {
669         case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
670                 return 1;
671         default:
672                 return 0;
673         }
674 }
675 
676 
677 
678 
679 /* ============== */
680 /* Driver Globals */
681 /* ============== */
682 static DEVICE_ATTR(wake_up_pme,
683                 0644, wake_up_pme_show,         wake_up_pme_store);
684 static DEVICE_ATTR(wake_up_modem,
685                 0644, wake_up_modem_show,       wake_up_modem_store);
686 static DEVICE_ATTR(wake_up_lan,
687                 0644, wake_up_lan_show, wake_up_lan_store);
688 static DEVICE_ATTR(wake_up_wlan,
689                 0644, wake_up_wlan_show,        wake_up_wlan_store);
690 static DEVICE_ATTR(wake_up_key,
691                 0644, wake_up_key_show, wake_up_key_store);
692 static DEVICE_ATTR(wake_up_mouse,
693                 0644, wake_up_mouse_show,       wake_up_mouse_store);
694 
695 static DEVICE_ATTR(fan1_input,  S_IRUGO, fan_show,          NULL);
696 static DEVICE_ATTR(temp1_input, S_IRUGO, temp_cpu,          NULL);
697 static DEVICE_ATTR(temp2_input, S_IRUGO, temp_cpu_local,    NULL);
698 static DEVICE_ATTR(temp3_input, S_IRUGO, temp_cpu_DTS,      NULL);
699 static DEVICE_ATTR(temp4_input, S_IRUGO, temp_northbridge,  NULL);
700 static DEVICE_ATTR(temp5_input, S_IRUGO, temp_vga,          NULL);
701 static DEVICE_ATTR(temp6_input, S_IRUGO, temp_SKIN,         NULL);
702 static DEVICE_ATTR(temp1_label, S_IRUGO, label_cpu,         NULL);
703 static DEVICE_ATTR(temp2_label, S_IRUGO, label_cpu_local,   NULL);
704 static DEVICE_ATTR(temp3_label, S_IRUGO, label_cpu_DTS,     NULL);
705 static DEVICE_ATTR(temp4_label, S_IRUGO, label_northbridge, NULL);
706 static DEVICE_ATTR(temp5_label, S_IRUGO, label_vga,         NULL);
707 static DEVICE_ATTR(temp6_label, S_IRUGO, label_SKIN,        NULL);
708 static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, pwm_show, pwm_store);
709 static DEVICE_ATTR(pwm1_enable,
710                    S_IRUGO | S_IWUSR, pwm_enable_show, pwm_enable_store);
711 
712 static struct attribute *compal_platform_attrs[] = {
713         &dev_attr_wake_up_pme.attr,
714         &dev_attr_wake_up_modem.attr,
715         &dev_attr_wake_up_lan.attr,
716         &dev_attr_wake_up_wlan.attr,
717         &dev_attr_wake_up_key.attr,
718         &dev_attr_wake_up_mouse.attr,
719         NULL
720 };
721 static struct attribute_group compal_platform_attr_group = {
722         .attrs = compal_platform_attrs
723 };
724 
725 static struct attribute *compal_hwmon_attrs[] = {
726         &dev_attr_pwm1_enable.attr,
727         &dev_attr_pwm1.attr,
728         &dev_attr_fan1_input.attr,
729         &dev_attr_temp1_input.attr,
730         &dev_attr_temp2_input.attr,
731         &dev_attr_temp3_input.attr,
732         &dev_attr_temp4_input.attr,
733         &dev_attr_temp5_input.attr,
734         &dev_attr_temp6_input.attr,
735         &dev_attr_temp1_label.attr,
736         &dev_attr_temp2_label.attr,
737         &dev_attr_temp3_label.attr,
738         &dev_attr_temp4_label.attr,
739         &dev_attr_temp5_label.attr,
740         &dev_attr_temp6_label.attr,
741         NULL
742 };
743 ATTRIBUTE_GROUPS(compal_hwmon);
744 
745 static int compal_probe(struct platform_device *);
746 static int compal_remove(struct platform_device *);
747 static struct platform_driver compal_driver = {
748         .driver = {
749                 .name = DRIVER_NAME,
750         },
751         .probe  = compal_probe,
752         .remove = compal_remove,
753 };
754 
755 static enum power_supply_property compal_bat_properties[] = {
756         POWER_SUPPLY_PROP_STATUS,
757         POWER_SUPPLY_PROP_HEALTH,
758         POWER_SUPPLY_PROP_PRESENT,
759         POWER_SUPPLY_PROP_TECHNOLOGY,
760         POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
761         POWER_SUPPLY_PROP_VOLTAGE_NOW,
762         POWER_SUPPLY_PROP_CURRENT_NOW,
763         POWER_SUPPLY_PROP_CURRENT_AVG,
764         POWER_SUPPLY_PROP_POWER_NOW,
765         POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
766         POWER_SUPPLY_PROP_CHARGE_NOW,
767         POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
768         POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
769         POWER_SUPPLY_PROP_CAPACITY,
770         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
771         POWER_SUPPLY_PROP_TEMP,
772         POWER_SUPPLY_PROP_TEMP_AMBIENT,
773         POWER_SUPPLY_PROP_MODEL_NAME,
774         POWER_SUPPLY_PROP_MANUFACTURER,
775         POWER_SUPPLY_PROP_SERIAL_NUMBER,
776 };
777 
778 static struct backlight_device *compalbl_device;
779 
780 static struct platform_device *compal_device;
781 
782 static struct rfkill *wifi_rfkill;
783 static struct rfkill *bt_rfkill;
784 
785 
786 
787 
788 
789 /* =================================== */
790 /* Initialization & clean-up functions */
791 /* =================================== */
792 
793 static int dmi_check_cb(const struct dmi_system_id *id)
794 {
795         pr_info("Identified laptop model '%s'\n", id->ident);
796         extra_features = false;
797         return 1;
798 }
799 
800 static int dmi_check_cb_extra(const struct dmi_system_id *id)
801 {
802         pr_info("Identified laptop model '%s', enabling extra features\n",
803                 id->ident);
804         extra_features = true;
805         return 1;
806 }
807 
808 static struct dmi_system_id __initdata compal_dmi_table[] = {
809         {
810                 .ident = "FL90/IFL90",
811                 .matches = {
812                         DMI_MATCH(DMI_BOARD_NAME, "IFL90"),
813                         DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
814                 },
815                 .callback = dmi_check_cb
816         },
817         {
818                 .ident = "FL90/IFL90",
819                 .matches = {
820                         DMI_MATCH(DMI_BOARD_NAME, "IFL90"),
821                         DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"),
822                 },
823                 .callback = dmi_check_cb
824         },
825         {
826                 .ident = "FL91/IFL91",
827                 .matches = {
828                         DMI_MATCH(DMI_BOARD_NAME, "IFL91"),
829                         DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
830                 },
831                 .callback = dmi_check_cb
832         },
833         {
834                 .ident = "FL92/JFL92",
835                 .matches = {
836                         DMI_MATCH(DMI_BOARD_NAME, "JFL92"),
837                         DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
838                 },
839                 .callback = dmi_check_cb
840         },
841         {
842                 .ident = "FT00/IFT00",
843                 .matches = {
844                         DMI_MATCH(DMI_BOARD_NAME, "IFT00"),
845                         DMI_MATCH(DMI_BOARD_VERSION, "IFT00"),
846                 },
847                 .callback = dmi_check_cb
848         },
849         {
850                 .ident = "Dell Mini 9",
851                 .matches = {
852                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
853                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 910"),
854                 },
855                 .callback = dmi_check_cb
856         },
857         {
858                 .ident = "Dell Mini 10",
859                 .matches = {
860                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
861                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1010"),
862                 },
863                 .callback = dmi_check_cb
864         },
865         {
866                 .ident = "Dell Mini 10v",
867                 .matches = {
868                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
869                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1011"),
870                 },
871                 .callback = dmi_check_cb
872         },
873         {
874                 .ident = "Dell Mini 1012",
875                 .matches = {
876                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
877                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"),
878                 },
879                 .callback = dmi_check_cb
880         },
881         {
882                 .ident = "Dell Inspiron 11z",
883                 .matches = {
884                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
885                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1110"),
886                 },
887                 .callback = dmi_check_cb
888         },
889         {
890                 .ident = "Dell Mini 12",
891                 .matches = {
892                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
893                         DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1210"),
894                 },
895                 .callback = dmi_check_cb
896         },
897         {
898                 .ident = "JHL90",
899                 .matches = {
900                         DMI_MATCH(DMI_BOARD_NAME, "JHL90"),
901                         DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"),
902                 },
903                 .callback = dmi_check_cb_extra
904         },
905         {
906                 .ident = "KHLB2",
907                 .matches = {
908                         DMI_MATCH(DMI_BOARD_NAME, "KHLB2"),
909                         DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"),
910                 },
911                 .callback = dmi_check_cb_extra
912         },
913         { }
914 };
915 MODULE_DEVICE_TABLE(dmi, compal_dmi_table);
916 
917 static const struct power_supply_desc psy_bat_desc = {
918         .name           = DRIVER_NAME,
919         .type           = POWER_SUPPLY_TYPE_BATTERY,
920         .properties     = compal_bat_properties,
921         .num_properties = ARRAY_SIZE(compal_bat_properties),
922         .get_property   = bat_get_property,
923         .set_property   = bat_set_property,
924         .property_is_writeable = bat_writeable_property,
925 };
926 
927 static void initialize_power_supply_data(struct compal_data *data)
928 {
929         ec_read_sequence(BAT_MANUFACTURER_NAME_ADDR,
930                                         data->bat_manufacturer_name,
931                                         BAT_MANUFACTURER_NAME_LEN);
932         data->bat_manufacturer_name[BAT_MANUFACTURER_NAME_LEN] = 0;
933 
934         ec_read_sequence(BAT_MODEL_NAME_ADDR,
935                                         data->bat_model_name,
936                                         BAT_MODEL_NAME_LEN);
937         data->bat_model_name[BAT_MODEL_NAME_LEN] = 0;
938 
939         scnprintf(data->bat_serial_number, BAT_SERIAL_NUMBER_LEN + 1, "%d",
940                                 ec_read_u16(BAT_SERIAL_NUMBER_ADDR));
941 }
942 
943 static void initialize_fan_control_data(struct compal_data *data)
944 {
945         data->pwm_enable = 2; /* Keep motherboard in control for now */
946         data->curr_pwm = 255; /* Try not to cause a CPU_on_fire exception
947                                  if we take over... */
948 }
949 
950 static int setup_rfkill(void)
951 {
952         int ret;
953 
954         wifi_rfkill = rfkill_alloc("compal-wifi", &compal_device->dev,
955                                 RFKILL_TYPE_WLAN, &compal_rfkill_ops,
956                                 (void *) WIRELESS_WLAN);
957         if (!wifi_rfkill)
958                 return -ENOMEM;
959 
960         ret = rfkill_register(wifi_rfkill);
961         if (ret)
962                 goto err_wifi;
963 
964         bt_rfkill = rfkill_alloc("compal-bluetooth", &compal_device->dev,
965                                 RFKILL_TYPE_BLUETOOTH, &compal_rfkill_ops,
966                                 (void *) WIRELESS_BT);
967         if (!bt_rfkill) {
968                 ret = -ENOMEM;
969                 goto err_allocate_bt;
970         }
971         ret = rfkill_register(bt_rfkill);
972         if (ret)
973                 goto err_register_bt;
974 
975         return 0;
976 
977 err_register_bt:
978         rfkill_destroy(bt_rfkill);
979 
980 err_allocate_bt:
981         rfkill_unregister(wifi_rfkill);
982 
983 err_wifi:
984         rfkill_destroy(wifi_rfkill);
985 
986         return ret;
987 }
988 
989 static int __init compal_init(void)
990 {
991         int ret;
992 
993         if (acpi_disabled) {
994                 pr_err("ACPI needs to be enabled for this driver to work!\n");
995                 return -ENODEV;
996         }
997 
998         if (!force && !dmi_check_system(compal_dmi_table)) {
999                 pr_err("Motherboard not recognized (You could try the module's force-parameter)\n");
1000                 return -ENODEV;
1001         }
1002 
1003         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1004                 struct backlight_properties props;
1005                 memset(&props, 0, sizeof(struct backlight_properties));
1006                 props.type = BACKLIGHT_PLATFORM;
1007                 props.max_brightness = BACKLIGHT_LEVEL_MAX;
1008                 compalbl_device = backlight_device_register(DRIVER_NAME,
1009                                                             NULL, NULL,
1010                                                             &compalbl_ops,
1011                                                             &props);
1012                 if (IS_ERR(compalbl_device))
1013                         return PTR_ERR(compalbl_device);
1014         }
1015 
1016         ret = platform_driver_register(&compal_driver);
1017         if (ret)
1018                 goto err_backlight;
1019 
1020         compal_device = platform_device_alloc(DRIVER_NAME, -1);
1021         if (!compal_device) {
1022                 ret = -ENOMEM;
1023                 goto err_platform_driver;
1024         }
1025 
1026         ret = platform_device_add(compal_device); /* This calls compal_probe */
1027         if (ret)
1028                 goto err_platform_device;
1029 
1030         ret = setup_rfkill();
1031         if (ret)
1032                 goto err_rfkill;
1033 
1034         pr_info("Driver " DRIVER_VERSION " successfully loaded\n");
1035         return 0;
1036 
1037 err_rfkill:
1038         platform_device_del(compal_device);
1039 
1040 err_platform_device:
1041         platform_device_put(compal_device);
1042 
1043 err_platform_driver:
1044         platform_driver_unregister(&compal_driver);
1045 
1046 err_backlight:
1047         backlight_device_unregister(compalbl_device);
1048 
1049         return ret;
1050 }
1051 
1052 static int compal_probe(struct platform_device *pdev)
1053 {
1054         int err;
1055         struct compal_data *data;
1056         struct device *hwmon_dev;
1057         struct power_supply_config psy_cfg = {};
1058 
1059         if (!extra_features)
1060                 return 0;
1061 
1062         /* Fan control */
1063         data = devm_kzalloc(&pdev->dev, sizeof(struct compal_data), GFP_KERNEL);
1064         if (!data)
1065                 return -ENOMEM;
1066 
1067         initialize_fan_control_data(data);
1068 
1069         err = sysfs_create_group(&pdev->dev.kobj, &compal_platform_attr_group);
1070         if (err)
1071                 return err;
1072 
1073         hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev,
1074                                                            "compal", data,
1075                                                            compal_hwmon_groups);
1076         if (IS_ERR(hwmon_dev)) {
1077                 err = PTR_ERR(hwmon_dev);
1078                 goto remove;
1079         }
1080 
1081         /* Power supply */
1082         initialize_power_supply_data(data);
1083         psy_cfg.drv_data = data;
1084         data->psy = power_supply_register(&compal_device->dev, &psy_bat_desc,
1085                                           &psy_cfg);
1086         if (IS_ERR(data->psy)) {
1087                 err = PTR_ERR(data->psy);
1088                 goto remove;
1089         }
1090 
1091         platform_set_drvdata(pdev, data);
1092 
1093         return 0;
1094 
1095 remove:
1096         sysfs_remove_group(&pdev->dev.kobj, &compal_platform_attr_group);
1097         return err;
1098 }
1099 
1100 static void __exit compal_cleanup(void)
1101 {
1102         platform_device_unregister(compal_device);
1103         platform_driver_unregister(&compal_driver);
1104         backlight_device_unregister(compalbl_device);
1105         rfkill_unregister(wifi_rfkill);
1106         rfkill_unregister(bt_rfkill);
1107         rfkill_destroy(wifi_rfkill);
1108         rfkill_destroy(bt_rfkill);
1109 
1110         pr_info("Driver unloaded\n");
1111 }
1112 
1113 static int compal_remove(struct platform_device *pdev)
1114 {
1115         struct compal_data *data;
1116 
1117         if (!extra_features)
1118                 return 0;
1119 
1120         pr_info("Unloading: resetting fan control to motherboard\n");
1121         pwm_disable_control();
1122 
1123         data = platform_get_drvdata(pdev);
1124         power_supply_unregister(data->psy);
1125 
1126         sysfs_remove_group(&pdev->dev.kobj, &compal_platform_attr_group);
1127 
1128         return 0;
1129 }
1130 
1131 
1132 module_init(compal_init);
1133 module_exit(compal_cleanup);
1134 
1135 MODULE_AUTHOR("Cezary Jackiewicz");
1136 MODULE_AUTHOR("Roald Frederickx (roald.frederickx@gmail.com)");
1137 MODULE_DESCRIPTION("Compal Laptop Support");
1138 MODULE_VERSION(DRIVER_VERSION);
1139 MODULE_LICENSE("GPL");
1140 

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