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