Merge branch 'drm-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
[linux-2.6] / drivers / hwmon / it87.c
1 /*
2     it87.c - Part of lm_sensors, Linux kernel modules for hardware
3              monitoring.
4
5     The IT8705F is an LPC-based Super I/O part that contains UARTs, a
6     parallel port, an IR port, a MIDI port, a floppy controller, etc., in
7     addition to an Environment Controller (Enhanced Hardware Monitor and
8     Fan Controller)
9
10     This driver supports only the Environment Controller in the IT8705F and
11     similar parts.  The other devices are supported by different drivers.
12
13     Supports: IT8705F  Super I/O chip w/LPC interface
14               IT8712F  Super I/O chip w/LPC interface
15               IT8716F  Super I/O chip w/LPC interface
16               IT8718F  Super I/O chip w/LPC interface
17               IT8726F  Super I/O chip w/LPC interface
18               Sis950   A clone of the IT8705F
19
20     Copyright (C) 2001 Chris Gauthron
21     Copyright (C) 2005-2007 Jean Delvare <khali@linux-fr.org>
22
23     This program is free software; you can redistribute it and/or modify
24     it under the terms of the GNU General Public License as published by
25     the Free Software Foundation; either version 2 of the License, or
26     (at your option) any later version.
27
28     This program is distributed in the hope that it will be useful,
29     but WITHOUT ANY WARRANTY; without even the implied warranty of
30     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
31     GNU General Public License for more details.
32
33     You should have received a copy of the GNU General Public License
34     along with this program; if not, write to the Free Software
35     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
36 */
37
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/slab.h>
41 #include <linux/jiffies.h>
42 #include <linux/platform_device.h>
43 #include <linux/hwmon.h>
44 #include <linux/hwmon-sysfs.h>
45 #include <linux/hwmon-vid.h>
46 #include <linux/err.h>
47 #include <linux/mutex.h>
48 #include <linux/sysfs.h>
49 #include <asm/io.h>
50
51 #define DRVNAME "it87"
52
53 enum chips { it87, it8712, it8716, it8718 };
54
55 static unsigned short force_id;
56 module_param(force_id, ushort, 0);
57 MODULE_PARM_DESC(force_id, "Override the detected device ID");
58
59 static struct platform_device *pdev;
60
61 #define REG     0x2e    /* The register to read/write */
62 #define DEV     0x07    /* Register: Logical device select */
63 #define VAL     0x2f    /* The value to read/write */
64 #define PME     0x04    /* The device with the fan registers in it */
65 #define GPIO    0x07    /* The device with the IT8718F VID value in it */
66 #define DEVID   0x20    /* Register: Device ID */
67 #define DEVREV  0x22    /* Register: Device Revision */
68
69 static inline int
70 superio_inb(int reg)
71 {
72         outb(reg, REG);
73         return inb(VAL);
74 }
75
76 static int superio_inw(int reg)
77 {
78         int val;
79         outb(reg++, REG);
80         val = inb(VAL) << 8;
81         outb(reg, REG);
82         val |= inb(VAL);
83         return val;
84 }
85
86 static inline void
87 superio_select(int ldn)
88 {
89         outb(DEV, REG);
90         outb(ldn, VAL);
91 }
92
93 static inline void
94 superio_enter(void)
95 {
96         outb(0x87, REG);
97         outb(0x01, REG);
98         outb(0x55, REG);
99         outb(0x55, REG);
100 }
101
102 static inline void
103 superio_exit(void)
104 {
105         outb(0x02, REG);
106         outb(0x02, VAL);
107 }
108
109 /* Logical device 4 registers */
110 #define IT8712F_DEVID 0x8712
111 #define IT8705F_DEVID 0x8705
112 #define IT8716F_DEVID 0x8716
113 #define IT8718F_DEVID 0x8718
114 #define IT8726F_DEVID 0x8726
115 #define IT87_ACT_REG  0x30
116 #define IT87_BASE_REG 0x60
117
118 /* Logical device 7 registers (IT8712F and later) */
119 #define IT87_SIO_PINX2_REG      0x2c    /* Pin selection */
120 #define IT87_SIO_VID_REG        0xfc    /* VID value */
121
122 /* Update battery voltage after every reading if true */
123 static int update_vbat;
124
125 /* Not all BIOSes properly configure the PWM registers */
126 static int fix_pwm_polarity;
127
128 /* Many IT87 constants specified below */
129
130 /* Length of ISA address segment */
131 #define IT87_EXTENT 8
132
133 /* Length of ISA address segment for Environmental Controller */
134 #define IT87_EC_EXTENT 2
135
136 /* Offset of EC registers from ISA base address */
137 #define IT87_EC_OFFSET 5
138
139 /* Where are the ISA address/data registers relative to the EC base address */
140 #define IT87_ADDR_REG_OFFSET 0
141 #define IT87_DATA_REG_OFFSET 1
142
143 /*----- The IT87 registers -----*/
144
145 #define IT87_REG_CONFIG        0x00
146
147 #define IT87_REG_ALARM1        0x01
148 #define IT87_REG_ALARM2        0x02
149 #define IT87_REG_ALARM3        0x03
150
151 /* The IT8718F has the VID value in a different register, in Super-I/O
152    configuration space. */
153 #define IT87_REG_VID           0x0a
154 /* Warning: register 0x0b is used for something completely different in
155    new chips/revisions. I suspect only 16-bit tachometer mode will work
156    for these. */
157 #define IT87_REG_FAN_DIV       0x0b
158 #define IT87_REG_FAN_16BIT     0x0c
159
160 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
161
162 static const u8 IT87_REG_FAN[]          = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
163 static const u8 IT87_REG_FAN_MIN[]      = { 0x10, 0x11, 0x12, 0x84, 0x86 };
164 static const u8 IT87_REG_FANX[]         = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
165 static const u8 IT87_REG_FANX_MIN[]     = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
166 #define IT87_REG_FAN_MAIN_CTRL 0x13
167 #define IT87_REG_FAN_CTL       0x14
168 #define IT87_REG_PWM(nr)       (0x15 + (nr))
169
170 #define IT87_REG_VIN(nr)       (0x20 + (nr))
171 #define IT87_REG_TEMP(nr)      (0x29 + (nr))
172
173 #define IT87_REG_VIN_MAX(nr)   (0x30 + (nr) * 2)
174 #define IT87_REG_VIN_MIN(nr)   (0x31 + (nr) * 2)
175 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
176 #define IT87_REG_TEMP_LOW(nr)  (0x41 + (nr) * 2)
177
178 #define IT87_REG_VIN_ENABLE    0x50
179 #define IT87_REG_TEMP_ENABLE   0x51
180
181 #define IT87_REG_CHIPID        0x58
182
183 #define IN_TO_REG(val)  (SENSORS_LIMIT((((val) + 8)/16),0,255))
184 #define IN_FROM_REG(val) ((val) * 16)
185
186 static inline u8 FAN_TO_REG(long rpm, int div)
187 {
188         if (rpm == 0)
189                 return 255;
190         rpm = SENSORS_LIMIT(rpm, 1, 1000000);
191         return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
192                              254);
193 }
194
195 static inline u16 FAN16_TO_REG(long rpm)
196 {
197         if (rpm == 0)
198                 return 0xffff;
199         return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
200 }
201
202 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div)))
203 /* The divider is fixed to 2 in 16-bit mode */
204 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2))
205
206 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\
207                                         ((val)+500)/1000),-128,127))
208 #define TEMP_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000)
209
210 #define PWM_TO_REG(val)   ((val) >> 1)
211 #define PWM_FROM_REG(val) (((val)&0x7f) << 1)
212
213 static int DIV_TO_REG(int val)
214 {
215         int answer = 0;
216         while (answer < 7 && (val >>= 1))
217                 answer++;
218         return answer;
219 }
220 #define DIV_FROM_REG(val) (1 << (val))
221
222 static const unsigned int pwm_freq[8] = {
223         48000000 / 128,
224         24000000 / 128,
225         12000000 / 128,
226         8000000 / 128,
227         6000000 / 128,
228         3000000 / 128,
229         1500000 / 128,
230         750000 / 128,
231 };
232
233
234 struct it87_sio_data {
235         enum chips type;
236         /* Values read from Super-I/O config space */
237         u8 vid_value;
238 };
239
240 /* For each registered chip, we need to keep some data in memory.
241    The structure is dynamically allocated. */
242 struct it87_data {
243         struct device *hwmon_dev;
244         enum chips type;
245
246         unsigned short addr;
247         const char *name;
248         struct mutex update_lock;
249         char valid;             /* !=0 if following fields are valid */
250         unsigned long last_updated;     /* In jiffies */
251
252         u8 in[9];               /* Register value */
253         u8 in_max[8];           /* Register value */
254         u8 in_min[8];           /* Register value */
255         u8 has_fan;             /* Bitfield, fans enabled */
256         u16 fan[5];             /* Register values, possibly combined */
257         u16 fan_min[5];         /* Register values, possibly combined */
258         u8 temp[3];             /* Register value */
259         u8 temp_high[3];        /* Register value */
260         u8 temp_low[3];         /* Register value */
261         u8 sensor;              /* Register value */
262         u8 fan_div[3];          /* Register encoding, shifted right */
263         u8 vid;                 /* Register encoding, combined */
264         u8 vrm;
265         u32 alarms;             /* Register encoding, combined */
266         u8 fan_main_ctrl;       /* Register value */
267         u8 fan_ctl;             /* Register value */
268         u8 manual_pwm_ctl[3];   /* manual PWM value set by user */
269 };
270
271
272 static int it87_probe(struct platform_device *pdev);
273 static int __devexit it87_remove(struct platform_device *pdev);
274
275 static int it87_read_value(struct it87_data *data, u8 reg);
276 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
277 static struct it87_data *it87_update_device(struct device *dev);
278 static int it87_check_pwm(struct device *dev);
279 static void it87_init_device(struct platform_device *pdev);
280
281
282 static struct platform_driver it87_driver = {
283         .driver = {
284                 .owner  = THIS_MODULE,
285                 .name   = DRVNAME,
286         },
287         .probe  = it87_probe,
288         .remove = __devexit_p(it87_remove),
289 };
290
291 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
292                 char *buf)
293 {
294         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
295         int nr = sensor_attr->index;
296
297         struct it87_data *data = it87_update_device(dev);
298         return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
299 }
300
301 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
302                 char *buf)
303 {
304         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
305         int nr = sensor_attr->index;
306
307         struct it87_data *data = it87_update_device(dev);
308         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
309 }
310
311 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
312                 char *buf)
313 {
314         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
315         int nr = sensor_attr->index;
316
317         struct it87_data *data = it87_update_device(dev);
318         return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
319 }
320
321 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
322                 const char *buf, size_t count)
323 {
324         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
325         int nr = sensor_attr->index;
326
327         struct it87_data *data = dev_get_drvdata(dev);
328         unsigned long val = simple_strtoul(buf, NULL, 10);
329
330         mutex_lock(&data->update_lock);
331         data->in_min[nr] = IN_TO_REG(val);
332         it87_write_value(data, IT87_REG_VIN_MIN(nr),
333                         data->in_min[nr]);
334         mutex_unlock(&data->update_lock);
335         return count;
336 }
337 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
338                 const char *buf, size_t count)
339 {
340         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
341         int nr = sensor_attr->index;
342
343         struct it87_data *data = dev_get_drvdata(dev);
344         unsigned long val = simple_strtoul(buf, NULL, 10);
345
346         mutex_lock(&data->update_lock);
347         data->in_max[nr] = IN_TO_REG(val);
348         it87_write_value(data, IT87_REG_VIN_MAX(nr),
349                         data->in_max[nr]);
350         mutex_unlock(&data->update_lock);
351         return count;
352 }
353
354 #define show_in_offset(offset)                                  \
355 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO,          \
356                 show_in, NULL, offset);
357
358 #define limit_in_offset(offset)                                 \
359 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR,  \
360                 show_in_min, set_in_min, offset);               \
361 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR,  \
362                 show_in_max, set_in_max, offset);
363
364 show_in_offset(0);
365 limit_in_offset(0);
366 show_in_offset(1);
367 limit_in_offset(1);
368 show_in_offset(2);
369 limit_in_offset(2);
370 show_in_offset(3);
371 limit_in_offset(3);
372 show_in_offset(4);
373 limit_in_offset(4);
374 show_in_offset(5);
375 limit_in_offset(5);
376 show_in_offset(6);
377 limit_in_offset(6);
378 show_in_offset(7);
379 limit_in_offset(7);
380 show_in_offset(8);
381
382 /* 3 temperatures */
383 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
384                 char *buf)
385 {
386         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
387         int nr = sensor_attr->index;
388
389         struct it87_data *data = it87_update_device(dev);
390         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
391 }
392 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
393                 char *buf)
394 {
395         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
396         int nr = sensor_attr->index;
397
398         struct it87_data *data = it87_update_device(dev);
399         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
400 }
401 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
402                 char *buf)
403 {
404         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
405         int nr = sensor_attr->index;
406
407         struct it87_data *data = it87_update_device(dev);
408         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
409 }
410 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
411                 const char *buf, size_t count)
412 {
413         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
414         int nr = sensor_attr->index;
415
416         struct it87_data *data = dev_get_drvdata(dev);
417         int val = simple_strtol(buf, NULL, 10);
418
419         mutex_lock(&data->update_lock);
420         data->temp_high[nr] = TEMP_TO_REG(val);
421         it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
422         mutex_unlock(&data->update_lock);
423         return count;
424 }
425 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
426                 const char *buf, size_t count)
427 {
428         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
429         int nr = sensor_attr->index;
430
431         struct it87_data *data = dev_get_drvdata(dev);
432         int val = simple_strtol(buf, NULL, 10);
433
434         mutex_lock(&data->update_lock);
435         data->temp_low[nr] = TEMP_TO_REG(val);
436         it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
437         mutex_unlock(&data->update_lock);
438         return count;
439 }
440 #define show_temp_offset(offset)                                        \
441 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO,                \
442                 show_temp, NULL, offset - 1);                           \
443 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,        \
444                 show_temp_max, set_temp_max, offset - 1);               \
445 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,        \
446                 show_temp_min, set_temp_min, offset - 1);
447
448 show_temp_offset(1);
449 show_temp_offset(2);
450 show_temp_offset(3);
451
452 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
453                 char *buf)
454 {
455         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
456         int nr = sensor_attr->index;
457
458         struct it87_data *data = it87_update_device(dev);
459         u8 reg = data->sensor; /* In case the value is updated while we use it */
460         
461         if (reg & (1 << nr))
462                 return sprintf(buf, "3\n");  /* thermal diode */
463         if (reg & (8 << nr))
464                 return sprintf(buf, "2\n");  /* thermistor */
465         return sprintf(buf, "0\n");      /* disabled */
466 }
467 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
468                 const char *buf, size_t count)
469 {
470         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
471         int nr = sensor_attr->index;
472
473         struct it87_data *data = dev_get_drvdata(dev);
474         int val = simple_strtol(buf, NULL, 10);
475
476         mutex_lock(&data->update_lock);
477
478         data->sensor &= ~(1 << nr);
479         data->sensor &= ~(8 << nr);
480         /* 3 = thermal diode; 2 = thermistor; 0 = disabled */
481         if (val == 3)
482             data->sensor |= 1 << nr;
483         else if (val == 2)
484             data->sensor |= 8 << nr;
485         else if (val != 0) {
486                 mutex_unlock(&data->update_lock);
487                 return -EINVAL;
488         }
489         it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
490         mutex_unlock(&data->update_lock);
491         return count;
492 }
493 #define show_sensor_offset(offset)                                      \
494 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR,       \
495                 show_sensor, set_sensor, offset - 1);
496
497 show_sensor_offset(1);
498 show_sensor_offset(2);
499 show_sensor_offset(3);
500
501 /* 3 Fans */
502 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
503                 char *buf)
504 {
505         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
506         int nr = sensor_attr->index;
507
508         struct it87_data *data = it87_update_device(dev);
509         return sprintf(buf,"%d\n", FAN_FROM_REG(data->fan[nr], 
510                                 DIV_FROM_REG(data->fan_div[nr])));
511 }
512 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
513                 char *buf)
514 {
515         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
516         int nr = sensor_attr->index;
517
518         struct it87_data *data = it87_update_device(dev);
519         return sprintf(buf,"%d\n",
520                 FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr])));
521 }
522 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
523                 char *buf)
524 {
525         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
526         int nr = sensor_attr->index;
527
528         struct it87_data *data = it87_update_device(dev);
529         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
530 }
531 static ssize_t show_pwm_enable(struct device *dev, struct device_attribute *attr,
532                 char *buf)
533 {
534         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
535         int nr = sensor_attr->index;
536
537         struct it87_data *data = it87_update_device(dev);
538         return sprintf(buf,"%d\n", (data->fan_main_ctrl & (1 << nr)) ? 1 : 0);
539 }
540 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
541                 char *buf)
542 {
543         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
544         int nr = sensor_attr->index;
545
546         struct it87_data *data = it87_update_device(dev);
547         return sprintf(buf,"%d\n", data->manual_pwm_ctl[nr]);
548 }
549 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
550                 char *buf)
551 {
552         struct it87_data *data = it87_update_device(dev);
553         int index = (data->fan_ctl >> 4) & 0x07;
554
555         return sprintf(buf, "%u\n", pwm_freq[index]);
556 }
557 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
558                 const char *buf, size_t count)
559 {
560         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
561         int nr = sensor_attr->index;
562
563         struct it87_data *data = dev_get_drvdata(dev);
564         int val = simple_strtol(buf, NULL, 10);
565         u8 reg;
566
567         mutex_lock(&data->update_lock);
568         reg = it87_read_value(data, IT87_REG_FAN_DIV);
569         switch (nr) {
570         case 0: data->fan_div[nr] = reg & 0x07; break;
571         case 1: data->fan_div[nr] = (reg >> 3) & 0x07; break;
572         case 2: data->fan_div[nr] = (reg & 0x40) ? 3 : 1; break;
573         }
574
575         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
576         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
577         mutex_unlock(&data->update_lock);
578         return count;
579 }
580 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
581                 const char *buf, size_t count)
582 {
583         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
584         int nr = sensor_attr->index;
585
586         struct it87_data *data = dev_get_drvdata(dev);
587         unsigned long val = simple_strtoul(buf, NULL, 10);
588         int min;
589         u8 old;
590
591         mutex_lock(&data->update_lock);
592         old = it87_read_value(data, IT87_REG_FAN_DIV);
593
594         /* Save fan min limit */
595         min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
596
597         switch (nr) {
598         case 0:
599         case 1:
600                 data->fan_div[nr] = DIV_TO_REG(val);
601                 break;
602         case 2:
603                 if (val < 8)
604                         data->fan_div[nr] = 1;
605                 else
606                         data->fan_div[nr] = 3;
607         }
608         val = old & 0x80;
609         val |= (data->fan_div[0] & 0x07);
610         val |= (data->fan_div[1] & 0x07) << 3;
611         if (data->fan_div[2] == 3)
612                 val |= 0x1 << 6;
613         it87_write_value(data, IT87_REG_FAN_DIV, val);
614
615         /* Restore fan min limit */
616         data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
617         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
618
619         mutex_unlock(&data->update_lock);
620         return count;
621 }
622 static ssize_t set_pwm_enable(struct device *dev,
623                 struct device_attribute *attr, const char *buf, size_t count)
624 {
625         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
626         int nr = sensor_attr->index;
627
628         struct it87_data *data = dev_get_drvdata(dev);
629         int val = simple_strtol(buf, NULL, 10);
630
631         mutex_lock(&data->update_lock);
632
633         if (val == 0) {
634                 int tmp;
635                 /* make sure the fan is on when in on/off mode */
636                 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
637                 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
638                 /* set on/off mode */
639                 data->fan_main_ctrl &= ~(1 << nr);
640                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
641         } else if (val == 1) {
642                 /* set SmartGuardian mode */
643                 data->fan_main_ctrl |= (1 << nr);
644                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
645                 /* set saved pwm value, clear FAN_CTLX PWM mode bit */
646                 it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
647         } else {
648                 mutex_unlock(&data->update_lock);
649                 return -EINVAL;
650         }
651
652         mutex_unlock(&data->update_lock);
653         return count;
654 }
655 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
656                 const char *buf, size_t count)
657 {
658         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
659         int nr = sensor_attr->index;
660
661         struct it87_data *data = dev_get_drvdata(dev);
662         int val = simple_strtol(buf, NULL, 10);
663
664         if (val < 0 || val > 255)
665                 return -EINVAL;
666
667         mutex_lock(&data->update_lock);
668         data->manual_pwm_ctl[nr] = val;
669         if (data->fan_main_ctrl & (1 << nr))
670                 it87_write_value(data, IT87_REG_PWM(nr), PWM_TO_REG(data->manual_pwm_ctl[nr]));
671         mutex_unlock(&data->update_lock);
672         return count;
673 }
674 static ssize_t set_pwm_freq(struct device *dev,
675                 struct device_attribute *attr, const char *buf, size_t count)
676 {
677         struct it87_data *data = dev_get_drvdata(dev);
678         unsigned long val = simple_strtoul(buf, NULL, 10);
679         int i;
680
681         /* Search for the nearest available frequency */
682         for (i = 0; i < 7; i++) {
683                 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
684                         break;
685         }
686
687         mutex_lock(&data->update_lock);
688         data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
689         data->fan_ctl |= i << 4;
690         it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
691         mutex_unlock(&data->update_lock);
692
693         return count;
694 }
695
696 #define show_fan_offset(offset)                                 \
697 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO,         \
698                 show_fan, NULL, offset - 1);                    \
699 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
700                 show_fan_min, set_fan_min, offset - 1);         \
701 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
702                 show_fan_div, set_fan_div, offset - 1);
703
704 show_fan_offset(1);
705 show_fan_offset(2);
706 show_fan_offset(3);
707
708 #define show_pwm_offset(offset)                                         \
709 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR,      \
710                 show_pwm_enable, set_pwm_enable, offset - 1);           \
711 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR,               \
712                 show_pwm, set_pwm, offset - 1);                         \
713 static DEVICE_ATTR(pwm##offset##_freq,                                  \
714                 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO),            \
715                 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL));
716
717 show_pwm_offset(1);
718 show_pwm_offset(2);
719 show_pwm_offset(3);
720
721 /* A different set of callbacks for 16-bit fans */
722 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
723                 char *buf)
724 {
725         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
726         int nr = sensor_attr->index;
727         struct it87_data *data = it87_update_device(dev);
728         return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
729 }
730
731 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
732                 char *buf)
733 {
734         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
735         int nr = sensor_attr->index;
736         struct it87_data *data = it87_update_device(dev);
737         return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
738 }
739
740 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
741                 const char *buf, size_t count)
742 {
743         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
744         int nr = sensor_attr->index;
745         struct it87_data *data = dev_get_drvdata(dev);
746         int val = simple_strtol(buf, NULL, 10);
747
748         mutex_lock(&data->update_lock);
749         data->fan_min[nr] = FAN16_TO_REG(val);
750         it87_write_value(data, IT87_REG_FAN_MIN[nr],
751                          data->fan_min[nr] & 0xff);
752         it87_write_value(data, IT87_REG_FANX_MIN[nr],
753                          data->fan_min[nr] >> 8);
754         mutex_unlock(&data->update_lock);
755         return count;
756 }
757
758 /* We want to use the same sysfs file names as 8-bit fans, but we need
759    different variable names, so we have to use SENSOR_ATTR instead of
760    SENSOR_DEVICE_ATTR. */
761 #define show_fan16_offset(offset) \
762 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
763         = SENSOR_ATTR(fan##offset##_input, S_IRUGO,             \
764                 show_fan16, NULL, offset - 1);                  \
765 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
766         = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,     \
767                 show_fan16_min, set_fan16_min, offset - 1)
768
769 show_fan16_offset(1);
770 show_fan16_offset(2);
771 show_fan16_offset(3);
772 show_fan16_offset(4);
773 show_fan16_offset(5);
774
775 /* Alarms */
776 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
777 {
778         struct it87_data *data = it87_update_device(dev);
779         return sprintf(buf, "%u\n", data->alarms);
780 }
781 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
782
783 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
784                 char *buf)
785 {
786         int bitnr = to_sensor_dev_attr(attr)->index;
787         struct it87_data *data = it87_update_device(dev);
788         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
789 }
790 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
791 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
792 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
793 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
794 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
795 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
796 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
797 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
798 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
799 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
800 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
801 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
802 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
803 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
804 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
805 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
806
807 static ssize_t
808 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
809 {
810         struct it87_data *data = dev_get_drvdata(dev);
811         return sprintf(buf, "%u\n", data->vrm);
812 }
813 static ssize_t
814 store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
815 {
816         struct it87_data *data = dev_get_drvdata(dev);
817         u32 val;
818
819         val = simple_strtoul(buf, NULL, 10);
820         data->vrm = val;
821
822         return count;
823 }
824 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
825
826 static ssize_t
827 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
828 {
829         struct it87_data *data = it87_update_device(dev);
830         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
831 }
832 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
833
834 static ssize_t show_name(struct device *dev, struct device_attribute
835                          *devattr, char *buf)
836 {
837         struct it87_data *data = dev_get_drvdata(dev);
838         return sprintf(buf, "%s\n", data->name);
839 }
840 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
841
842 static struct attribute *it87_attributes[] = {
843         &sensor_dev_attr_in0_input.dev_attr.attr,
844         &sensor_dev_attr_in1_input.dev_attr.attr,
845         &sensor_dev_attr_in2_input.dev_attr.attr,
846         &sensor_dev_attr_in3_input.dev_attr.attr,
847         &sensor_dev_attr_in4_input.dev_attr.attr,
848         &sensor_dev_attr_in5_input.dev_attr.attr,
849         &sensor_dev_attr_in6_input.dev_attr.attr,
850         &sensor_dev_attr_in7_input.dev_attr.attr,
851         &sensor_dev_attr_in8_input.dev_attr.attr,
852         &sensor_dev_attr_in0_min.dev_attr.attr,
853         &sensor_dev_attr_in1_min.dev_attr.attr,
854         &sensor_dev_attr_in2_min.dev_attr.attr,
855         &sensor_dev_attr_in3_min.dev_attr.attr,
856         &sensor_dev_attr_in4_min.dev_attr.attr,
857         &sensor_dev_attr_in5_min.dev_attr.attr,
858         &sensor_dev_attr_in6_min.dev_attr.attr,
859         &sensor_dev_attr_in7_min.dev_attr.attr,
860         &sensor_dev_attr_in0_max.dev_attr.attr,
861         &sensor_dev_attr_in1_max.dev_attr.attr,
862         &sensor_dev_attr_in2_max.dev_attr.attr,
863         &sensor_dev_attr_in3_max.dev_attr.attr,
864         &sensor_dev_attr_in4_max.dev_attr.attr,
865         &sensor_dev_attr_in5_max.dev_attr.attr,
866         &sensor_dev_attr_in6_max.dev_attr.attr,
867         &sensor_dev_attr_in7_max.dev_attr.attr,
868         &sensor_dev_attr_in0_alarm.dev_attr.attr,
869         &sensor_dev_attr_in1_alarm.dev_attr.attr,
870         &sensor_dev_attr_in2_alarm.dev_attr.attr,
871         &sensor_dev_attr_in3_alarm.dev_attr.attr,
872         &sensor_dev_attr_in4_alarm.dev_attr.attr,
873         &sensor_dev_attr_in5_alarm.dev_attr.attr,
874         &sensor_dev_attr_in6_alarm.dev_attr.attr,
875         &sensor_dev_attr_in7_alarm.dev_attr.attr,
876
877         &sensor_dev_attr_temp1_input.dev_attr.attr,
878         &sensor_dev_attr_temp2_input.dev_attr.attr,
879         &sensor_dev_attr_temp3_input.dev_attr.attr,
880         &sensor_dev_attr_temp1_max.dev_attr.attr,
881         &sensor_dev_attr_temp2_max.dev_attr.attr,
882         &sensor_dev_attr_temp3_max.dev_attr.attr,
883         &sensor_dev_attr_temp1_min.dev_attr.attr,
884         &sensor_dev_attr_temp2_min.dev_attr.attr,
885         &sensor_dev_attr_temp3_min.dev_attr.attr,
886         &sensor_dev_attr_temp1_type.dev_attr.attr,
887         &sensor_dev_attr_temp2_type.dev_attr.attr,
888         &sensor_dev_attr_temp3_type.dev_attr.attr,
889         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
890         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
891         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
892
893         &dev_attr_alarms.attr,
894         &dev_attr_name.attr,
895         NULL
896 };
897
898 static const struct attribute_group it87_group = {
899         .attrs = it87_attributes,
900 };
901
902 static struct attribute *it87_attributes_opt[] = {
903         &sensor_dev_attr_fan1_input16.dev_attr.attr,
904         &sensor_dev_attr_fan1_min16.dev_attr.attr,
905         &sensor_dev_attr_fan2_input16.dev_attr.attr,
906         &sensor_dev_attr_fan2_min16.dev_attr.attr,
907         &sensor_dev_attr_fan3_input16.dev_attr.attr,
908         &sensor_dev_attr_fan3_min16.dev_attr.attr,
909         &sensor_dev_attr_fan4_input16.dev_attr.attr,
910         &sensor_dev_attr_fan4_min16.dev_attr.attr,
911         &sensor_dev_attr_fan5_input16.dev_attr.attr,
912         &sensor_dev_attr_fan5_min16.dev_attr.attr,
913
914         &sensor_dev_attr_fan1_input.dev_attr.attr,
915         &sensor_dev_attr_fan1_min.dev_attr.attr,
916         &sensor_dev_attr_fan1_div.dev_attr.attr,
917         &sensor_dev_attr_fan2_input.dev_attr.attr,
918         &sensor_dev_attr_fan2_min.dev_attr.attr,
919         &sensor_dev_attr_fan2_div.dev_attr.attr,
920         &sensor_dev_attr_fan3_input.dev_attr.attr,
921         &sensor_dev_attr_fan3_min.dev_attr.attr,
922         &sensor_dev_attr_fan3_div.dev_attr.attr,
923
924         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
925         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
926         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
927         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
928         &sensor_dev_attr_fan5_alarm.dev_attr.attr,
929
930         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
931         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
932         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
933         &sensor_dev_attr_pwm1.dev_attr.attr,
934         &sensor_dev_attr_pwm2.dev_attr.attr,
935         &sensor_dev_attr_pwm3.dev_attr.attr,
936         &dev_attr_pwm1_freq.attr,
937         &dev_attr_pwm2_freq.attr,
938         &dev_attr_pwm3_freq.attr,
939
940         &dev_attr_vrm.attr,
941         &dev_attr_cpu0_vid.attr,
942         NULL
943 };
944
945 static const struct attribute_group it87_group_opt = {
946         .attrs = it87_attributes_opt,
947 };
948
949 /* SuperIO detection - will change isa_address if a chip is found */
950 static int __init it87_find(unsigned short *address,
951         struct it87_sio_data *sio_data)
952 {
953         int err = -ENODEV;
954         u16 chip_type;
955
956         superio_enter();
957         chip_type = force_id ? force_id : superio_inw(DEVID);
958
959         switch (chip_type) {
960         case IT8705F_DEVID:
961                 sio_data->type = it87;
962                 break;
963         case IT8712F_DEVID:
964                 sio_data->type = it8712;
965                 break;
966         case IT8716F_DEVID:
967         case IT8726F_DEVID:
968                 sio_data->type = it8716;
969                 break;
970         case IT8718F_DEVID:
971                 sio_data->type = it8718;
972                 break;
973         case 0xffff:    /* No device at all */
974                 goto exit;
975         default:
976                 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n",
977                          chip_type);
978                 goto exit;
979         }
980
981         superio_select(PME);
982         if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
983                 pr_info("it87: Device not activated, skipping\n");
984                 goto exit;
985         }
986
987         *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
988         if (*address == 0) {
989                 pr_info("it87: Base address not set, skipping\n");
990                 goto exit;
991         }
992
993         err = 0;
994         pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
995                 chip_type, *address, superio_inb(DEVREV) & 0x0f);
996
997         /* Read GPIO config and VID value from LDN 7 (GPIO) */
998         if (chip_type != IT8705F_DEVID) {
999                 int reg;
1000
1001                 superio_select(GPIO);
1002                 if (chip_type == it8718)
1003                         sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1004
1005                 reg = superio_inb(IT87_SIO_PINX2_REG);
1006                 if (reg & (1 << 0))
1007                         pr_info("it87: in3 is VCC (+5V)\n");
1008                 if (reg & (1 << 1))
1009                         pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
1010         }
1011
1012 exit:
1013         superio_exit();
1014         return err;
1015 }
1016
1017 static int __devinit it87_probe(struct platform_device *pdev)
1018 {
1019         struct it87_data *data;
1020         struct resource *res;
1021         struct device *dev = &pdev->dev;
1022         struct it87_sio_data *sio_data = dev->platform_data;
1023         int err = 0;
1024         int enable_pwm_interface;
1025         static const char *names[] = {
1026                 "it87",
1027                 "it8712",
1028                 "it8716",
1029                 "it8718",
1030         };
1031
1032         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1033         if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
1034                 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1035                         (unsigned long)res->start,
1036                         (unsigned long)(res->start + IT87_EC_EXTENT - 1));
1037                 err = -EBUSY;
1038                 goto ERROR0;
1039         }
1040
1041         if (!(data = kzalloc(sizeof(struct it87_data), GFP_KERNEL))) {
1042                 err = -ENOMEM;
1043                 goto ERROR1;
1044         }
1045
1046         data->addr = res->start;
1047         data->type = sio_data->type;
1048         data->name = names[sio_data->type];
1049
1050         /* Now, we do the remaining detection. */
1051         if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1052          || it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
1053                 err = -ENODEV;
1054                 goto ERROR2;
1055         }
1056
1057         platform_set_drvdata(pdev, data);
1058
1059         mutex_init(&data->update_lock);
1060
1061         /* Check PWM configuration */
1062         enable_pwm_interface = it87_check_pwm(dev);
1063
1064         /* Initialize the IT87 chip */
1065         it87_init_device(pdev);
1066
1067         /* Register sysfs hooks */
1068         if ((err = sysfs_create_group(&dev->kobj, &it87_group)))
1069                 goto ERROR2;
1070
1071         /* Do not create fan files for disabled fans */
1072         if (data->type == it8716 || data->type == it8718) {
1073                 /* 16-bit tachometers */
1074                 if (data->has_fan & (1 << 0)) {
1075                         if ((err = device_create_file(dev,
1076                              &sensor_dev_attr_fan1_input16.dev_attr))
1077                          || (err = device_create_file(dev,
1078                              &sensor_dev_attr_fan1_min16.dev_attr))
1079                          || (err = device_create_file(dev,
1080                              &sensor_dev_attr_fan1_alarm.dev_attr)))
1081                                 goto ERROR4;
1082                 }
1083                 if (data->has_fan & (1 << 1)) {
1084                         if ((err = device_create_file(dev,
1085                              &sensor_dev_attr_fan2_input16.dev_attr))
1086                          || (err = device_create_file(dev,
1087                              &sensor_dev_attr_fan2_min16.dev_attr))
1088                          || (err = device_create_file(dev,
1089                              &sensor_dev_attr_fan2_alarm.dev_attr)))
1090                                 goto ERROR4;
1091                 }
1092                 if (data->has_fan & (1 << 2)) {
1093                         if ((err = device_create_file(dev,
1094                              &sensor_dev_attr_fan3_input16.dev_attr))
1095                          || (err = device_create_file(dev,
1096                              &sensor_dev_attr_fan3_min16.dev_attr))
1097                          || (err = device_create_file(dev,
1098                              &sensor_dev_attr_fan3_alarm.dev_attr)))
1099                                 goto ERROR4;
1100                 }
1101                 if (data->has_fan & (1 << 3)) {
1102                         if ((err = device_create_file(dev,
1103                              &sensor_dev_attr_fan4_input16.dev_attr))
1104                          || (err = device_create_file(dev,
1105                              &sensor_dev_attr_fan4_min16.dev_attr))
1106                          || (err = device_create_file(dev,
1107                              &sensor_dev_attr_fan4_alarm.dev_attr)))
1108                                 goto ERROR4;
1109                 }
1110                 if (data->has_fan & (1 << 4)) {
1111                         if ((err = device_create_file(dev,
1112                              &sensor_dev_attr_fan5_input16.dev_attr))
1113                          || (err = device_create_file(dev,
1114                              &sensor_dev_attr_fan5_min16.dev_attr))
1115                          || (err = device_create_file(dev,
1116                              &sensor_dev_attr_fan5_alarm.dev_attr)))
1117                                 goto ERROR4;
1118                 }
1119         } else {
1120                 /* 8-bit tachometers with clock divider */
1121                 if (data->has_fan & (1 << 0)) {
1122                         if ((err = device_create_file(dev,
1123                              &sensor_dev_attr_fan1_input.dev_attr))
1124                          || (err = device_create_file(dev,
1125                              &sensor_dev_attr_fan1_min.dev_attr))
1126                          || (err = device_create_file(dev,
1127                              &sensor_dev_attr_fan1_div.dev_attr))
1128                          || (err = device_create_file(dev,
1129                              &sensor_dev_attr_fan1_alarm.dev_attr)))
1130                                 goto ERROR4;
1131                 }
1132                 if (data->has_fan & (1 << 1)) {
1133                         if ((err = device_create_file(dev,
1134                              &sensor_dev_attr_fan2_input.dev_attr))
1135                          || (err = device_create_file(dev,
1136                              &sensor_dev_attr_fan2_min.dev_attr))
1137                          || (err = device_create_file(dev,
1138                              &sensor_dev_attr_fan2_div.dev_attr))
1139                          || (err = device_create_file(dev,
1140                              &sensor_dev_attr_fan2_alarm.dev_attr)))
1141                                 goto ERROR4;
1142                 }
1143                 if (data->has_fan & (1 << 2)) {
1144                         if ((err = device_create_file(dev,
1145                              &sensor_dev_attr_fan3_input.dev_attr))
1146                          || (err = device_create_file(dev,
1147                              &sensor_dev_attr_fan3_min.dev_attr))
1148                          || (err = device_create_file(dev,
1149                              &sensor_dev_attr_fan3_div.dev_attr))
1150                          || (err = device_create_file(dev,
1151                              &sensor_dev_attr_fan3_alarm.dev_attr)))
1152                                 goto ERROR4;
1153                 }
1154         }
1155
1156         if (enable_pwm_interface) {
1157                 if ((err = device_create_file(dev,
1158                      &sensor_dev_attr_pwm1_enable.dev_attr))
1159                  || (err = device_create_file(dev,
1160                      &sensor_dev_attr_pwm2_enable.dev_attr))
1161                  || (err = device_create_file(dev,
1162                      &sensor_dev_attr_pwm3_enable.dev_attr))
1163                  || (err = device_create_file(dev,
1164                      &sensor_dev_attr_pwm1.dev_attr))
1165                  || (err = device_create_file(dev,
1166                      &sensor_dev_attr_pwm2.dev_attr))
1167                  || (err = device_create_file(dev,
1168                      &sensor_dev_attr_pwm3.dev_attr))
1169                  || (err = device_create_file(dev,
1170                      &dev_attr_pwm1_freq))
1171                  || (err = device_create_file(dev,
1172                      &dev_attr_pwm2_freq))
1173                  || (err = device_create_file(dev,
1174                      &dev_attr_pwm3_freq)))
1175                         goto ERROR4;
1176         }
1177
1178         if (data->type == it8712 || data->type == it8716
1179          || data->type == it8718) {
1180                 data->vrm = vid_which_vrm();
1181                 /* VID reading from Super-I/O config space if available */
1182                 data->vid = sio_data->vid_value;
1183                 if ((err = device_create_file(dev,
1184                      &dev_attr_vrm))
1185                  || (err = device_create_file(dev,
1186                      &dev_attr_cpu0_vid)))
1187                         goto ERROR4;
1188         }
1189
1190         data->hwmon_dev = hwmon_device_register(dev);
1191         if (IS_ERR(data->hwmon_dev)) {
1192                 err = PTR_ERR(data->hwmon_dev);
1193                 goto ERROR4;
1194         }
1195
1196         return 0;
1197
1198 ERROR4:
1199         sysfs_remove_group(&dev->kobj, &it87_group);
1200         sysfs_remove_group(&dev->kobj, &it87_group_opt);
1201 ERROR2:
1202         platform_set_drvdata(pdev, NULL);
1203         kfree(data);
1204 ERROR1:
1205         release_region(res->start, IT87_EC_EXTENT);
1206 ERROR0:
1207         return err;
1208 }
1209
1210 static int __devexit it87_remove(struct platform_device *pdev)
1211 {
1212         struct it87_data *data = platform_get_drvdata(pdev);
1213
1214         hwmon_device_unregister(data->hwmon_dev);
1215         sysfs_remove_group(&pdev->dev.kobj, &it87_group);
1216         sysfs_remove_group(&pdev->dev.kobj, &it87_group_opt);
1217
1218         release_region(data->addr, IT87_EC_EXTENT);
1219         platform_set_drvdata(pdev, NULL);
1220         kfree(data);
1221
1222         return 0;
1223 }
1224
1225 /* Must be called with data->update_lock held, except during initialization.
1226    We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1227    would slow down the IT87 access and should not be necessary. */
1228 static int it87_read_value(struct it87_data *data, u8 reg)
1229 {
1230         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1231         return inb_p(data->addr + IT87_DATA_REG_OFFSET);
1232 }
1233
1234 /* Must be called with data->update_lock held, except during initialization.
1235    We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1236    would slow down the IT87 access and should not be necessary. */
1237 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
1238 {
1239         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1240         outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
1241 }
1242
1243 /* Return 1 if and only if the PWM interface is safe to use */
1244 static int __devinit it87_check_pwm(struct device *dev)
1245 {
1246         struct it87_data *data = dev_get_drvdata(dev);
1247         /* Some BIOSes fail to correctly configure the IT87 fans. All fans off
1248          * and polarity set to active low is sign that this is the case so we
1249          * disable pwm control to protect the user. */
1250         int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1251         if ((tmp & 0x87) == 0) {
1252                 if (fix_pwm_polarity) {
1253                         /* The user asks us to attempt a chip reconfiguration.
1254                          * This means switching to active high polarity and
1255                          * inverting all fan speed values. */
1256                         int i;
1257                         u8 pwm[3];
1258
1259                         for (i = 0; i < 3; i++)
1260                                 pwm[i] = it87_read_value(data,
1261                                                          IT87_REG_PWM(i));
1262
1263                         /* If any fan is in automatic pwm mode, the polarity
1264                          * might be correct, as suspicious as it seems, so we
1265                          * better don't change anything (but still disable the
1266                          * PWM interface). */
1267                         if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
1268                                 dev_info(dev, "Reconfiguring PWM to "
1269                                          "active high polarity\n");
1270                                 it87_write_value(data, IT87_REG_FAN_CTL,
1271                                                  tmp | 0x87);
1272                                 for (i = 0; i < 3; i++)
1273                                         it87_write_value(data,
1274                                                          IT87_REG_PWM(i),
1275                                                          0x7f & ~pwm[i]);
1276                                 return 1;
1277                         }
1278
1279                         dev_info(dev, "PWM configuration is "
1280                                  "too broken to be fixed\n");
1281                 }
1282
1283                 dev_info(dev, "Detected broken BIOS "
1284                          "defaults, disabling PWM interface\n");
1285                 return 0;
1286         } else if (fix_pwm_polarity) {
1287                 dev_info(dev, "PWM configuration looks "
1288                          "sane, won't touch\n");
1289         }
1290
1291         return 1;
1292 }
1293
1294 /* Called when we have found a new IT87. */
1295 static void __devinit it87_init_device(struct platform_device *pdev)
1296 {
1297         struct it87_data *data = platform_get_drvdata(pdev);
1298         int tmp, i;
1299
1300         /* initialize to sane defaults:
1301          * - if the chip is in manual pwm mode, this will be overwritten with
1302          *   the actual settings on the chip (so in this case, initialization
1303          *   is not needed)
1304          * - if in automatic or on/off mode, we could switch to manual mode,
1305          *   read the registers and set manual_pwm_ctl accordingly, but currently
1306          *   this is not implemented, so we initialize to something sane */
1307         for (i = 0; i < 3; i++) {
1308                 data->manual_pwm_ctl[i] = 0xff;
1309         }
1310
1311         /* Some chips seem to have default value 0xff for all limit
1312          * registers. For low voltage limits it makes no sense and triggers
1313          * alarms, so change to 0 instead. For high temperature limits, it
1314          * means -1 degree C, which surprisingly doesn't trigger an alarm,
1315          * but is still confusing, so change to 127 degrees C. */
1316         for (i = 0; i < 8; i++) {
1317                 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
1318                 if (tmp == 0xff)
1319                         it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
1320         }
1321         for (i = 0; i < 3; i++) {
1322                 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1323                 if (tmp == 0xff)
1324                         it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
1325         }
1326
1327         /* Check if temperature channnels are reset manually or by some reason */
1328         tmp = it87_read_value(data, IT87_REG_TEMP_ENABLE);
1329         if ((tmp & 0x3f) == 0) {
1330                 /* Temp1,Temp3=thermistor; Temp2=thermal diode */
1331                 tmp = (tmp & 0xc0) | 0x2a;
1332                 it87_write_value(data, IT87_REG_TEMP_ENABLE, tmp);
1333         }
1334         data->sensor = tmp;
1335
1336         /* Check if voltage monitors are reset manually or by some reason */
1337         tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
1338         if ((tmp & 0xff) == 0) {
1339                 /* Enable all voltage monitors */
1340                 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
1341         }
1342
1343         /* Check if tachometers are reset manually or by some reason */
1344         data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
1345         if ((data->fan_main_ctrl & 0x70) == 0) {
1346                 /* Enable all fan tachometers */
1347                 data->fan_main_ctrl |= 0x70;
1348                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
1349         }
1350         data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
1351
1352         /* Set tachometers to 16-bit mode if needed */
1353         if (data->type == it8716 || data->type == it8718) {
1354                 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
1355                 if (~tmp & 0x07 & data->has_fan) {
1356                         dev_dbg(&pdev->dev,
1357                                 "Setting fan1-3 to 16-bit mode\n");
1358                         it87_write_value(data, IT87_REG_FAN_16BIT,
1359                                          tmp | 0x07);
1360                 }
1361                 if (tmp & (1 << 4))
1362                         data->has_fan |= (1 << 3);      /* fan4 enabled */
1363                 if (tmp & (1 << 5))
1364                         data->has_fan |= (1 << 4);      /* fan5 enabled */
1365         }
1366
1367         /* Set current fan mode registers and the default settings for the
1368          * other mode registers */
1369         for (i = 0; i < 3; i++) {
1370                 if (data->fan_main_ctrl & (1 << i)) {
1371                         /* pwm mode */
1372                         tmp = it87_read_value(data, IT87_REG_PWM(i));
1373                         if (tmp & 0x80) {
1374                                 /* automatic pwm - not yet implemented, but
1375                                  * leave the settings made by the BIOS alone
1376                                  * until a change is requested via the sysfs
1377                                  * interface */
1378                         } else {
1379                                 /* manual pwm */
1380                                 data->manual_pwm_ctl[i] = PWM_FROM_REG(tmp);
1381                         }
1382                 }
1383         }
1384
1385         /* Start monitoring */
1386         it87_write_value(data, IT87_REG_CONFIG,
1387                          (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
1388                          | (update_vbat ? 0x41 : 0x01));
1389 }
1390
1391 static struct it87_data *it87_update_device(struct device *dev)
1392 {
1393         struct it87_data *data = dev_get_drvdata(dev);
1394         int i;
1395
1396         mutex_lock(&data->update_lock);
1397
1398         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1399             || !data->valid) {
1400
1401                 if (update_vbat) {
1402                         /* Cleared after each update, so reenable.  Value
1403                           returned by this read will be previous value */       
1404                         it87_write_value(data, IT87_REG_CONFIG,
1405                            it87_read_value(data, IT87_REG_CONFIG) | 0x40);
1406                 }
1407                 for (i = 0; i <= 7; i++) {
1408                         data->in[i] =
1409                             it87_read_value(data, IT87_REG_VIN(i));
1410                         data->in_min[i] =
1411                             it87_read_value(data, IT87_REG_VIN_MIN(i));
1412                         data->in_max[i] =
1413                             it87_read_value(data, IT87_REG_VIN_MAX(i));
1414                 }
1415                 /* in8 (battery) has no limit registers */
1416                 data->in[8] =
1417                     it87_read_value(data, IT87_REG_VIN(8));
1418
1419                 for (i = 0; i < 5; i++) {
1420                         /* Skip disabled fans */
1421                         if (!(data->has_fan & (1 << i)))
1422                                 continue;
1423
1424                         data->fan_min[i] =
1425                             it87_read_value(data, IT87_REG_FAN_MIN[i]);
1426                         data->fan[i] = it87_read_value(data,
1427                                        IT87_REG_FAN[i]);
1428                         /* Add high byte if in 16-bit mode */
1429                         if (data->type == it8716 || data->type == it8718) {
1430                                 data->fan[i] |= it87_read_value(data,
1431                                                 IT87_REG_FANX[i]) << 8;
1432                                 data->fan_min[i] |= it87_read_value(data,
1433                                                 IT87_REG_FANX_MIN[i]) << 8;
1434                         }
1435                 }
1436                 for (i = 0; i < 3; i++) {
1437                         data->temp[i] =
1438                             it87_read_value(data, IT87_REG_TEMP(i));
1439                         data->temp_high[i] =
1440                             it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1441                         data->temp_low[i] =
1442                             it87_read_value(data, IT87_REG_TEMP_LOW(i));
1443                 }
1444
1445                 /* Newer chips don't have clock dividers */
1446                 if ((data->has_fan & 0x07) && data->type != it8716
1447                  && data->type != it8718) {
1448                         i = it87_read_value(data, IT87_REG_FAN_DIV);
1449                         data->fan_div[0] = i & 0x07;
1450                         data->fan_div[1] = (i >> 3) & 0x07;
1451                         data->fan_div[2] = (i & 0x40) ? 3 : 1;
1452                 }
1453
1454                 data->alarms =
1455                         it87_read_value(data, IT87_REG_ALARM1) |
1456                         (it87_read_value(data, IT87_REG_ALARM2) << 8) |
1457                         (it87_read_value(data, IT87_REG_ALARM3) << 16);
1458                 data->fan_main_ctrl = it87_read_value(data,
1459                                 IT87_REG_FAN_MAIN_CTRL);
1460                 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
1461
1462                 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
1463                 /* The 8705 does not have VID capability */
1464                 if (data->type == it8712 || data->type == it8716) {
1465                         data->vid = it87_read_value(data, IT87_REG_VID);
1466                         /* The older IT8712F revisions had only 5 VID pins,
1467                            but we assume it is always safe to read 6 bits. */
1468                         data->vid &= 0x3f;
1469                 }
1470                 data->last_updated = jiffies;
1471                 data->valid = 1;
1472         }
1473
1474         mutex_unlock(&data->update_lock);
1475
1476         return data;
1477 }
1478
1479 static int __init it87_device_add(unsigned short address,
1480                                   const struct it87_sio_data *sio_data)
1481 {
1482         struct resource res = {
1483                 .start  = address + IT87_EC_OFFSET,
1484                 .end    = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
1485                 .name   = DRVNAME,
1486                 .flags  = IORESOURCE_IO,
1487         };
1488         int err;
1489
1490         pdev = platform_device_alloc(DRVNAME, address);
1491         if (!pdev) {
1492                 err = -ENOMEM;
1493                 printk(KERN_ERR DRVNAME ": Device allocation failed\n");
1494                 goto exit;
1495         }
1496
1497         err = platform_device_add_resources(pdev, &res, 1);
1498         if (err) {
1499                 printk(KERN_ERR DRVNAME ": Device resource addition failed "
1500                        "(%d)\n", err);
1501                 goto exit_device_put;
1502         }
1503
1504         err = platform_device_add_data(pdev, sio_data,
1505                                        sizeof(struct it87_sio_data));
1506         if (err) {
1507                 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n");
1508                 goto exit_device_put;
1509         }
1510
1511         err = platform_device_add(pdev);
1512         if (err) {
1513                 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
1514                        err);
1515                 goto exit_device_put;
1516         }
1517
1518         return 0;
1519
1520 exit_device_put:
1521         platform_device_put(pdev);
1522 exit:
1523         return err;
1524 }
1525
1526 static int __init sm_it87_init(void)
1527 {
1528         int err;
1529         unsigned short isa_address=0;
1530         struct it87_sio_data sio_data;
1531
1532         err = it87_find(&isa_address, &sio_data);
1533         if (err)
1534                 return err;
1535         err = platform_driver_register(&it87_driver);
1536         if (err)
1537                 return err;
1538
1539         err = it87_device_add(isa_address, &sio_data);
1540         if (err){
1541                 platform_driver_unregister(&it87_driver);
1542                 return err;
1543         }
1544
1545         return 0;
1546 }
1547
1548 static void __exit sm_it87_exit(void)
1549 {
1550         platform_device_unregister(pdev);
1551         platform_driver_unregister(&it87_driver);
1552 }
1553
1554
1555 MODULE_AUTHOR("Chris Gauthron, "
1556               "Jean Delvare <khali@linux-fr.org>");
1557 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8726F, SiS950 driver");
1558 module_param(update_vbat, bool, 0);
1559 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
1560 module_param(fix_pwm_polarity, bool, 0);
1561 MODULE_PARM_DESC(fix_pwm_polarity, "Force PWM polarity to active high (DANGEROUS)");
1562 MODULE_LICENSE("GPL");
1563
1564 module_init(sm_it87_init);
1565 module_exit(sm_it87_exit);