]> git.openfabrics.org - ~shefty/rdma-dev.git/blob - drivers/hwmon/it87.c
e0d1910c04d969c7dcd5e1a8faccf399e5d146c8
[~shefty/rdma-dev.git] / 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  *            IT8720F  Super I/O chip w/LPC interface
18  *            IT8721F  Super I/O chip w/LPC interface
19  *            IT8726F  Super I/O chip w/LPC interface
20  *            IT8728F  Super I/O chip w/LPC interface
21  *            IT8758E  Super I/O chip w/LPC interface
22  *            IT8782F  Super I/O chip w/LPC interface
23  *            IT8783E/F Super I/O chip w/LPC interface
24  *            Sis950   A clone of the IT8705F
25  *
26  *  Copyright (C) 2001 Chris Gauthron
27  *  Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org>
28  *
29  *  This program is free software; you can redistribute it and/or modify
30  *  it under the terms of the GNU General Public License as published by
31  *  the Free Software Foundation; either version 2 of the License, or
32  *  (at your option) any later version.
33  *
34  *  This program is distributed in the hope that it will be useful,
35  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
36  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
37  *  GNU General Public License for more details.
38  *
39  *  You should have received a copy of the GNU General Public License
40  *  along with this program; if not, write to the Free Software
41  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
42  */
43
44 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
45
46 #include <linux/module.h>
47 #include <linux/init.h>
48 #include <linux/slab.h>
49 #include <linux/jiffies.h>
50 #include <linux/platform_device.h>
51 #include <linux/hwmon.h>
52 #include <linux/hwmon-sysfs.h>
53 #include <linux/hwmon-vid.h>
54 #include <linux/err.h>
55 #include <linux/mutex.h>
56 #include <linux/sysfs.h>
57 #include <linux/string.h>
58 #include <linux/dmi.h>
59 #include <linux/acpi.h>
60 #include <linux/io.h>
61
62 #define DRVNAME "it87"
63
64 enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8782,
65              it8783 };
66
67 static unsigned short force_id;
68 module_param(force_id, ushort, 0);
69 MODULE_PARM_DESC(force_id, "Override the detected device ID");
70
71 static struct platform_device *pdev;
72
73 #define REG     0x2e    /* The register to read/write */
74 #define DEV     0x07    /* Register: Logical device select */
75 #define VAL     0x2f    /* The value to read/write */
76 #define PME     0x04    /* The device with the fan registers in it */
77
78 /* The device with the IT8718F/IT8720F VID value in it */
79 #define GPIO    0x07
80
81 #define DEVID   0x20    /* Register: Device ID */
82 #define DEVREV  0x22    /* Register: Device Revision */
83
84 static inline int superio_inb(int reg)
85 {
86         outb(reg, REG);
87         return inb(VAL);
88 }
89
90 static inline void superio_outb(int reg, int val)
91 {
92         outb(reg, REG);
93         outb(val, VAL);
94 }
95
96 static int superio_inw(int reg)
97 {
98         int val;
99         outb(reg++, REG);
100         val = inb(VAL) << 8;
101         outb(reg, REG);
102         val |= inb(VAL);
103         return val;
104 }
105
106 static inline void superio_select(int ldn)
107 {
108         outb(DEV, REG);
109         outb(ldn, VAL);
110 }
111
112 static inline int superio_enter(void)
113 {
114         /*
115          * Try to reserve REG and REG + 1 for exclusive access.
116          */
117         if (!request_muxed_region(REG, 2, DRVNAME))
118                 return -EBUSY;
119
120         outb(0x87, REG);
121         outb(0x01, REG);
122         outb(0x55, REG);
123         outb(0x55, REG);
124         return 0;
125 }
126
127 static inline void superio_exit(void)
128 {
129         outb(0x02, REG);
130         outb(0x02, VAL);
131         release_region(REG, 2);
132 }
133
134 /* Logical device 4 registers */
135 #define IT8712F_DEVID 0x8712
136 #define IT8705F_DEVID 0x8705
137 #define IT8716F_DEVID 0x8716
138 #define IT8718F_DEVID 0x8718
139 #define IT8720F_DEVID 0x8720
140 #define IT8721F_DEVID 0x8721
141 #define IT8726F_DEVID 0x8726
142 #define IT8728F_DEVID 0x8728
143 #define IT8782F_DEVID 0x8782
144 #define IT8783E_DEVID 0x8783
145 #define IT87_ACT_REG  0x30
146 #define IT87_BASE_REG 0x60
147
148 /* Logical device 7 registers (IT8712F and later) */
149 #define IT87_SIO_GPIO1_REG      0x25
150 #define IT87_SIO_GPIO3_REG      0x27
151 #define IT87_SIO_GPIO5_REG      0x29
152 #define IT87_SIO_PINX1_REG      0x2a    /* Pin selection */
153 #define IT87_SIO_PINX2_REG      0x2c    /* Pin selection */
154 #define IT87_SIO_SPI_REG        0xef    /* SPI function pin select */
155 #define IT87_SIO_VID_REG        0xfc    /* VID value */
156 #define IT87_SIO_BEEP_PIN_REG   0xf6    /* Beep pin mapping */
157
158 /* Update battery voltage after every reading if true */
159 static bool update_vbat;
160
161 /* Not all BIOSes properly configure the PWM registers */
162 static bool fix_pwm_polarity;
163
164 /* Many IT87 constants specified below */
165
166 /* Length of ISA address segment */
167 #define IT87_EXTENT 8
168
169 /* Length of ISA address segment for Environmental Controller */
170 #define IT87_EC_EXTENT 2
171
172 /* Offset of EC registers from ISA base address */
173 #define IT87_EC_OFFSET 5
174
175 /* Where are the ISA address/data registers relative to the EC base address */
176 #define IT87_ADDR_REG_OFFSET 0
177 #define IT87_DATA_REG_OFFSET 1
178
179 /*----- The IT87 registers -----*/
180
181 #define IT87_REG_CONFIG        0x00
182
183 #define IT87_REG_ALARM1        0x01
184 #define IT87_REG_ALARM2        0x02
185 #define IT87_REG_ALARM3        0x03
186
187 /*
188  * The IT8718F and IT8720F have the VID value in a different register, in
189  * Super-I/O configuration space.
190  */
191 #define IT87_REG_VID           0x0a
192 /*
193  * The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
194  * for fan divisors. Later IT8712F revisions must use 16-bit tachometer
195  * mode.
196  */
197 #define IT87_REG_FAN_DIV       0x0b
198 #define IT87_REG_FAN_16BIT     0x0c
199
200 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
201
202 static const u8 IT87_REG_FAN[]          = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
203 static const u8 IT87_REG_FAN_MIN[]      = { 0x10, 0x11, 0x12, 0x84, 0x86 };
204 static const u8 IT87_REG_FANX[]         = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
205 static const u8 IT87_REG_FANX_MIN[]     = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
206 static const u8 IT87_REG_TEMP_OFFSET[]  = { 0x56, 0x57, 0x59 };
207
208 #define IT87_REG_FAN_MAIN_CTRL 0x13
209 #define IT87_REG_FAN_CTL       0x14
210 #define IT87_REG_PWM(nr)       (0x15 + (nr))
211 #define IT87_REG_PWM_DUTY(nr)  (0x63 + (nr) * 8)
212
213 #define IT87_REG_VIN(nr)       (0x20 + (nr))
214 #define IT87_REG_TEMP(nr)      (0x29 + (nr))
215
216 #define IT87_REG_VIN_MAX(nr)   (0x30 + (nr) * 2)
217 #define IT87_REG_VIN_MIN(nr)   (0x31 + (nr) * 2)
218 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
219 #define IT87_REG_TEMP_LOW(nr)  (0x41 + (nr) * 2)
220
221 #define IT87_REG_VIN_ENABLE    0x50
222 #define IT87_REG_TEMP_ENABLE   0x51
223 #define IT87_REG_TEMP_EXTRA    0x55
224 #define IT87_REG_BEEP_ENABLE   0x5c
225
226 #define IT87_REG_CHIPID        0x58
227
228 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
229 #define IT87_REG_AUTO_PWM(nr, i)  (0x65 + (nr) * 8 + (i))
230
231
232 struct it87_sio_data {
233         enum chips type;
234         /* Values read from Super-I/O config space */
235         u8 revision;
236         u8 vid_value;
237         u8 beep_pin;
238         u8 internal;    /* Internal sensors can be labeled */
239         /* Features skipped based on config or DMI */
240         u16 skip_in;
241         u8 skip_vid;
242         u8 skip_fan;
243         u8 skip_pwm;
244         u8 skip_temp;
245 };
246
247 /*
248  * For each registered chip, we need to keep some data in memory.
249  * The structure is dynamically allocated.
250  */
251 struct it87_data {
252         struct device *hwmon_dev;
253         enum chips type;
254         u8 revision;
255
256         unsigned short addr;
257         const char *name;
258         struct mutex update_lock;
259         char valid;             /* !=0 if following fields are valid */
260         unsigned long last_updated;     /* In jiffies */
261
262         u16 in_scaled;          /* Internal voltage sensors are scaled */
263         u8 in[9][3];            /* [nr][0]=in, [1]=min, [2]=max */
264         u8 has_fan;             /* Bitfield, fans enabled */
265         u16 fan[5][2];          /* Register values, [nr][0]=fan, [1]=min */
266         u8 has_temp;            /* Bitfield, temp sensors enabled */
267         s8 temp[3][4];          /* [nr][0]=temp, [1]=min, [2]=max, [3]=offset */
268         u8 sensor;              /* Register value */
269         u8 fan_div[3];          /* Register encoding, shifted right */
270         u8 vid;                 /* Register encoding, combined */
271         u8 vrm;
272         u32 alarms;             /* Register encoding, combined */
273         u8 beeps;               /* Register encoding */
274         u8 fan_main_ctrl;       /* Register value */
275         u8 fan_ctl;             /* Register value */
276
277         /*
278          * The following 3 arrays correspond to the same registers up to
279          * the IT8720F. The meaning of bits 6-0 depends on the value of bit
280          * 7, and we want to preserve settings on mode changes, so we have
281          * to track all values separately.
282          * Starting with the IT8721F, the manual PWM duty cycles are stored
283          * in separate registers (8-bit values), so the separate tracking
284          * is no longer needed, but it is still done to keep the driver
285          * simple.
286          */
287         u8 pwm_ctrl[3];         /* Register value */
288         u8 pwm_duty[3];         /* Manual PWM value set by user */
289         u8 pwm_temp_map[3];     /* PWM to temp. chan. mapping (bits 1-0) */
290
291         /* Automatic fan speed control registers */
292         u8 auto_pwm[3][4];      /* [nr][3] is hard-coded */
293         s8 auto_temp[3][5];     /* [nr][0] is point1_temp_hyst */
294 };
295
296 static inline int has_12mv_adc(const struct it87_data *data)
297 {
298         /*
299          * IT8721F and later have a 12 mV ADC, also with internal scaling
300          * on selected inputs.
301          */
302         return data->type == it8721
303             || data->type == it8728;
304 }
305
306 static inline int has_newer_autopwm(const struct it87_data *data)
307 {
308         /*
309          * IT8721F and later have separate registers for the temperature
310          * mapping and the manual duty cycle.
311          */
312         return data->type == it8721
313             || data->type == it8728;
314 }
315
316 static inline int has_temp_offset(const struct it87_data *data)
317 {
318         return data->type == it8716
319             || data->type == it8718
320             || data->type == it8720
321             || data->type == it8721
322             || data->type == it8728
323             || data->type == it8782
324             || data->type == it8783;
325 }
326
327 static int adc_lsb(const struct it87_data *data, int nr)
328 {
329         int lsb = has_12mv_adc(data) ? 12 : 16;
330         if (data->in_scaled & (1 << nr))
331                 lsb <<= 1;
332         return lsb;
333 }
334
335 static u8 in_to_reg(const struct it87_data *data, int nr, long val)
336 {
337         val = DIV_ROUND_CLOSEST(val, adc_lsb(data, nr));
338         return SENSORS_LIMIT(val, 0, 255);
339 }
340
341 static int in_from_reg(const struct it87_data *data, int nr, int val)
342 {
343         return val * adc_lsb(data, nr);
344 }
345
346 static inline u8 FAN_TO_REG(long rpm, int div)
347 {
348         if (rpm == 0)
349                 return 255;
350         rpm = SENSORS_LIMIT(rpm, 1, 1000000);
351         return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
352                              254);
353 }
354
355 static inline u16 FAN16_TO_REG(long rpm)
356 {
357         if (rpm == 0)
358                 return 0xffff;
359         return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
360 }
361
362 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
363                                 1350000 / ((val) * (div)))
364 /* The divider is fixed to 2 in 16-bit mode */
365 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
366                              1350000 / ((val) * 2))
367
368 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val) < 0 ? (((val) - 500) / 1000) : \
369                                         ((val) + 500) / 1000), -128, 127))
370 #define TEMP_FROM_REG(val) ((val) * 1000)
371
372 static u8 pwm_to_reg(const struct it87_data *data, long val)
373 {
374         if (has_newer_autopwm(data))
375                 return val;
376         else
377                 return val >> 1;
378 }
379
380 static int pwm_from_reg(const struct it87_data *data, u8 reg)
381 {
382         if (has_newer_autopwm(data))
383                 return reg;
384         else
385                 return (reg & 0x7f) << 1;
386 }
387
388
389 static int DIV_TO_REG(int val)
390 {
391         int answer = 0;
392         while (answer < 7 && (val >>= 1))
393                 answer++;
394         return answer;
395 }
396 #define DIV_FROM_REG(val) (1 << (val))
397
398 static const unsigned int pwm_freq[8] = {
399         48000000 / 128,
400         24000000 / 128,
401         12000000 / 128,
402         8000000 / 128,
403         6000000 / 128,
404         3000000 / 128,
405         1500000 / 128,
406         750000 / 128,
407 };
408
409 static inline int has_16bit_fans(const struct it87_data *data)
410 {
411         /*
412          * IT8705F Datasheet 0.4.1, 3h == Version G.
413          * IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
414          * These are the first revisions with 16-bit tachometer support.
415          */
416         return (data->type == it87 && data->revision >= 0x03)
417             || (data->type == it8712 && data->revision >= 0x08)
418             || data->type == it8716
419             || data->type == it8718
420             || data->type == it8720
421             || data->type == it8721
422             || data->type == it8728
423             || data->type == it8782
424             || data->type == it8783;
425 }
426
427 static inline int has_old_autopwm(const struct it87_data *data)
428 {
429         /*
430          * The old automatic fan speed control interface is implemented
431          * by IT8705F chips up to revision F and IT8712F chips up to
432          * revision G.
433          */
434         return (data->type == it87 && data->revision < 0x03)
435             || (data->type == it8712 && data->revision < 0x08);
436 }
437
438 static int it87_probe(struct platform_device *pdev);
439 static int it87_remove(struct platform_device *pdev);
440
441 static int it87_read_value(struct it87_data *data, u8 reg);
442 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
443 static struct it87_data *it87_update_device(struct device *dev);
444 static int it87_check_pwm(struct device *dev);
445 static void it87_init_device(struct platform_device *pdev);
446
447
448 static struct platform_driver it87_driver = {
449         .driver = {
450                 .owner  = THIS_MODULE,
451                 .name   = DRVNAME,
452         },
453         .probe  = it87_probe,
454         .remove = it87_remove,
455 };
456
457 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
458                        char *buf)
459 {
460         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
461         int nr = sattr->nr;
462         int index = sattr->index;
463
464         struct it87_data *data = it87_update_device(dev);
465         return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr][index]));
466 }
467
468 static ssize_t set_in(struct device *dev, struct device_attribute *attr,
469                       const char *buf, size_t count)
470 {
471         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
472         int nr = sattr->nr;
473         int index = sattr->index;
474
475         struct it87_data *data = dev_get_drvdata(dev);
476         unsigned long val;
477
478         if (kstrtoul(buf, 10, &val) < 0)
479                 return -EINVAL;
480
481         mutex_lock(&data->update_lock);
482         data->in[nr][index] = in_to_reg(data, nr, val);
483         it87_write_value(data,
484                          index == 1 ? IT87_REG_VIN_MIN(nr)
485                                     : IT87_REG_VIN_MAX(nr),
486                          data->in[nr][index]);
487         mutex_unlock(&data->update_lock);
488         return count;
489 }
490
491 static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0);
492 static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, set_in,
493                             0, 1);
494 static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, set_in,
495                             0, 2);
496
497 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0);
498 static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_in, set_in,
499                             1, 1);
500 static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_in, set_in,
501                             1, 2);
502
503 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0);
504 static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, set_in,
505                             2, 1);
506 static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, set_in,
507                             2, 2);
508
509 static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0);
510 static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, set_in,
511                             3, 1);
512 static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, set_in,
513                             3, 2);
514
515 static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0);
516 static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, set_in,
517                             4, 1);
518 static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, set_in,
519                             4, 2);
520
521 static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, 5, 0);
522 static SENSOR_DEVICE_ATTR_2(in5_min, S_IRUGO | S_IWUSR, show_in, set_in,
523                             5, 1);
524 static SENSOR_DEVICE_ATTR_2(in5_max, S_IRUGO | S_IWUSR, show_in, set_in,
525                             5, 2);
526
527 static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, 6, 0);
528 static SENSOR_DEVICE_ATTR_2(in6_min, S_IRUGO | S_IWUSR, show_in, set_in,
529                             6, 1);
530 static SENSOR_DEVICE_ATTR_2(in6_max, S_IRUGO | S_IWUSR, show_in, set_in,
531                             6, 2);
532
533 static SENSOR_DEVICE_ATTR_2(in7_input, S_IRUGO, show_in, NULL, 7, 0);
534 static SENSOR_DEVICE_ATTR_2(in7_min, S_IRUGO | S_IWUSR, show_in, set_in,
535                             7, 1);
536 static SENSOR_DEVICE_ATTR_2(in7_max, S_IRUGO | S_IWUSR, show_in, set_in,
537                             7, 2);
538
539 static SENSOR_DEVICE_ATTR_2(in8_input, S_IRUGO, show_in, NULL, 8, 0);
540
541 /* 3 temperatures */
542 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
543                          char *buf)
544 {
545         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
546         int nr = sattr->nr;
547         int index = sattr->index;
548         struct it87_data *data = it87_update_device(dev);
549
550         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
551 }
552
553 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
554                         const char *buf, size_t count)
555 {
556         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
557         int nr = sattr->nr;
558         int index = sattr->index;
559         struct it87_data *data = dev_get_drvdata(dev);
560         long val;
561         u8 reg, regval;
562
563         if (kstrtol(buf, 10, &val) < 0)
564                 return -EINVAL;
565
566         mutex_lock(&data->update_lock);
567
568         switch (index) {
569         default:
570         case 1:
571                 reg = IT87_REG_TEMP_LOW(nr);
572                 break;
573         case 2:
574                 reg = IT87_REG_TEMP_HIGH(nr);
575                 break;
576         case 3:
577                 regval = it87_read_value(data, IT87_REG_BEEP_ENABLE);
578                 if (!(regval & 0x80)) {
579                         regval |= 0x80;
580                         it87_write_value(data, IT87_REG_BEEP_ENABLE, regval);
581                 }
582                 data->valid = 0;
583                 reg = IT87_REG_TEMP_OFFSET[nr];
584                 break;
585         }
586
587         data->temp[nr][index] = TEMP_TO_REG(val);
588         it87_write_value(data, reg, data->temp[nr][index]);
589         mutex_unlock(&data->update_lock);
590         return count;
591 }
592
593 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
594 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
595                             0, 1);
596 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
597                             0, 2);
598 static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
599                             set_temp, 0, 3);
600 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0);
601 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
602                             1, 1);
603 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
604                             1, 2);
605 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
606                             set_temp, 1, 3);
607 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 2, 0);
608 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
609                             2, 1);
610 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
611                             2, 2);
612 static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
613                             set_temp, 2, 3);
614
615 static ssize_t show_temp_type(struct device *dev, struct device_attribute *attr,
616                               char *buf)
617 {
618         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
619         int nr = sensor_attr->index;
620         struct it87_data *data = it87_update_device(dev);
621         u8 reg = data->sensor;      /* In case value is updated while used */
622
623         if (reg & (1 << nr))
624                 return sprintf(buf, "3\n");  /* thermal diode */
625         if (reg & (8 << nr))
626                 return sprintf(buf, "4\n");  /* thermistor */
627         return sprintf(buf, "0\n");      /* disabled */
628 }
629
630 static ssize_t set_temp_type(struct device *dev, struct device_attribute *attr,
631                              const char *buf, size_t count)
632 {
633         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
634         int nr = sensor_attr->index;
635
636         struct it87_data *data = dev_get_drvdata(dev);
637         long val;
638         u8 reg;
639
640         if (kstrtol(buf, 10, &val) < 0)
641                 return -EINVAL;
642
643         reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
644         reg &= ~(1 << nr);
645         reg &= ~(8 << nr);
646         if (val == 2) { /* backwards compatibility */
647                 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
648                          "instead\n");
649                 val = 4;
650         }
651         /* 3 = thermal diode; 4 = thermistor; 0 = disabled */
652         if (val == 3)
653                 reg |= 1 << nr;
654         else if (val == 4)
655                 reg |= 8 << nr;
656         else if (val != 0)
657                 return -EINVAL;
658
659         mutex_lock(&data->update_lock);
660         data->sensor = reg;
661         it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
662         data->valid = 0;        /* Force cache refresh */
663         mutex_unlock(&data->update_lock);
664         return count;
665 }
666
667 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, show_temp_type,
668                           set_temp_type, 0);
669 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, show_temp_type,
670                           set_temp_type, 1);
671 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, show_temp_type,
672                           set_temp_type, 2);
673
674 /* 3 Fans */
675
676 static int pwm_mode(const struct it87_data *data, int nr)
677 {
678         int ctrl = data->fan_main_ctrl & (1 << nr);
679
680         if (ctrl == 0)                                  /* Full speed */
681                 return 0;
682         if (data->pwm_ctrl[nr] & 0x80)                  /* Automatic mode */
683                 return 2;
684         else                                            /* Manual mode */
685                 return 1;
686 }
687
688 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
689                         char *buf)
690 {
691         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
692         int nr = sattr->nr;
693         int index = sattr->index;
694         int speed;
695         struct it87_data *data = it87_update_device(dev);
696
697         speed = has_16bit_fans(data) ?
698                 FAN16_FROM_REG(data->fan[nr][index]) :
699                 FAN_FROM_REG(data->fan[nr][index],
700                              DIV_FROM_REG(data->fan_div[nr]));
701         return sprintf(buf, "%d\n", speed);
702 }
703
704 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
705                 char *buf)
706 {
707         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
708         int nr = sensor_attr->index;
709
710         struct it87_data *data = it87_update_device(dev);
711         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
712 }
713 static ssize_t show_pwm_enable(struct device *dev,
714                 struct device_attribute *attr, char *buf)
715 {
716         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
717         int nr = sensor_attr->index;
718
719         struct it87_data *data = it87_update_device(dev);
720         return sprintf(buf, "%d\n", pwm_mode(data, nr));
721 }
722 static ssize_t show_pwm(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
728         struct it87_data *data = it87_update_device(dev);
729         return sprintf(buf, "%d\n",
730                        pwm_from_reg(data, data->pwm_duty[nr]));
731 }
732 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
733                 char *buf)
734 {
735         struct it87_data *data = it87_update_device(dev);
736         int index = (data->fan_ctl >> 4) & 0x07;
737
738         return sprintf(buf, "%u\n", pwm_freq[index]);
739 }
740
741 static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
742                        const char *buf, size_t count)
743 {
744         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
745         int nr = sattr->nr;
746         int index = sattr->index;
747
748         struct it87_data *data = dev_get_drvdata(dev);
749         long val;
750         u8 reg;
751
752         if (kstrtol(buf, 10, &val) < 0)
753                 return -EINVAL;
754
755         mutex_lock(&data->update_lock);
756
757         if (has_16bit_fans(data)) {
758                 data->fan[nr][index] = FAN16_TO_REG(val);
759                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
760                                  data->fan[nr][index] & 0xff);
761                 it87_write_value(data, IT87_REG_FANX_MIN[nr],
762                                  data->fan[nr][index] >> 8);
763         } else {
764                 reg = it87_read_value(data, IT87_REG_FAN_DIV);
765                 switch (nr) {
766                 case 0:
767                         data->fan_div[nr] = reg & 0x07;
768                         break;
769                 case 1:
770                         data->fan_div[nr] = (reg >> 3) & 0x07;
771                         break;
772                 case 2:
773                         data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
774                         break;
775                 }
776                 data->fan[nr][index] =
777                   FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
778                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
779                                  data->fan[nr][index]);
780         }
781
782         mutex_unlock(&data->update_lock);
783         return count;
784 }
785
786 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
787                 const char *buf, size_t count)
788 {
789         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
790         int nr = sensor_attr->index;
791
792         struct it87_data *data = dev_get_drvdata(dev);
793         unsigned long val;
794         int min;
795         u8 old;
796
797         if (kstrtoul(buf, 10, &val) < 0)
798                 return -EINVAL;
799
800         mutex_lock(&data->update_lock);
801         old = it87_read_value(data, IT87_REG_FAN_DIV);
802
803         /* Save fan min limit */
804         min = FAN_FROM_REG(data->fan[nr][1], DIV_FROM_REG(data->fan_div[nr]));
805
806         switch (nr) {
807         case 0:
808         case 1:
809                 data->fan_div[nr] = DIV_TO_REG(val);
810                 break;
811         case 2:
812                 if (val < 8)
813                         data->fan_div[nr] = 1;
814                 else
815                         data->fan_div[nr] = 3;
816         }
817         val = old & 0x80;
818         val |= (data->fan_div[0] & 0x07);
819         val |= (data->fan_div[1] & 0x07) << 3;
820         if (data->fan_div[2] == 3)
821                 val |= 0x1 << 6;
822         it87_write_value(data, IT87_REG_FAN_DIV, val);
823
824         /* Restore fan min limit */
825         data->fan[nr][1] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
826         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan[nr][1]);
827
828         mutex_unlock(&data->update_lock);
829         return count;
830 }
831
832 /* Returns 0 if OK, -EINVAL otherwise */
833 static int check_trip_points(struct device *dev, int nr)
834 {
835         const struct it87_data *data = dev_get_drvdata(dev);
836         int i, err = 0;
837
838         if (has_old_autopwm(data)) {
839                 for (i = 0; i < 3; i++) {
840                         if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
841                                 err = -EINVAL;
842                 }
843                 for (i = 0; i < 2; i++) {
844                         if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
845                                 err = -EINVAL;
846                 }
847         }
848
849         if (err) {
850                 dev_err(dev, "Inconsistent trip points, not switching to "
851                         "automatic mode\n");
852                 dev_err(dev, "Adjust the trip points and try again\n");
853         }
854         return err;
855 }
856
857 static ssize_t set_pwm_enable(struct device *dev,
858                 struct device_attribute *attr, const char *buf, size_t count)
859 {
860         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
861         int nr = sensor_attr->index;
862
863         struct it87_data *data = dev_get_drvdata(dev);
864         long val;
865
866         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 2)
867                 return -EINVAL;
868
869         /* Check trip points before switching to automatic mode */
870         if (val == 2) {
871                 if (check_trip_points(dev, nr) < 0)
872                         return -EINVAL;
873         }
874
875         mutex_lock(&data->update_lock);
876
877         if (val == 0) {
878                 int tmp;
879                 /* make sure the fan is on when in on/off mode */
880                 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
881                 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
882                 /* set on/off mode */
883                 data->fan_main_ctrl &= ~(1 << nr);
884                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
885                                  data->fan_main_ctrl);
886         } else {
887                 if (val == 1)                           /* Manual mode */
888                         data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
889                                              data->pwm_temp_map[nr] :
890                                              data->pwm_duty[nr];
891                 else                                    /* Automatic mode */
892                         data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
893                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
894                 /* set SmartGuardian mode */
895                 data->fan_main_ctrl |= (1 << nr);
896                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
897                                  data->fan_main_ctrl);
898         }
899
900         mutex_unlock(&data->update_lock);
901         return count;
902 }
903 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
904                 const char *buf, size_t count)
905 {
906         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
907         int nr = sensor_attr->index;
908
909         struct it87_data *data = dev_get_drvdata(dev);
910         long val;
911
912         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
913                 return -EINVAL;
914
915         mutex_lock(&data->update_lock);
916         if (has_newer_autopwm(data)) {
917                 /*
918                  * If we are in automatic mode, the PWM duty cycle register
919                  * is read-only so we can't write the value.
920                  */
921                 if (data->pwm_ctrl[nr] & 0x80) {
922                         mutex_unlock(&data->update_lock);
923                         return -EBUSY;
924                 }
925                 data->pwm_duty[nr] = pwm_to_reg(data, val);
926                 it87_write_value(data, IT87_REG_PWM_DUTY(nr),
927                                  data->pwm_duty[nr]);
928         } else {
929                 data->pwm_duty[nr] = pwm_to_reg(data, val);
930                 /*
931                  * If we are in manual mode, write the duty cycle immediately;
932                  * otherwise, just store it for later use.
933                  */
934                 if (!(data->pwm_ctrl[nr] & 0x80)) {
935                         data->pwm_ctrl[nr] = data->pwm_duty[nr];
936                         it87_write_value(data, IT87_REG_PWM(nr),
937                                          data->pwm_ctrl[nr]);
938                 }
939         }
940         mutex_unlock(&data->update_lock);
941         return count;
942 }
943 static ssize_t set_pwm_freq(struct device *dev,
944                 struct device_attribute *attr, const char *buf, size_t count)
945 {
946         struct it87_data *data = dev_get_drvdata(dev);
947         unsigned long val;
948         int i;
949
950         if (kstrtoul(buf, 10, &val) < 0)
951                 return -EINVAL;
952
953         /* Search for the nearest available frequency */
954         for (i = 0; i < 7; i++) {
955                 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
956                         break;
957         }
958
959         mutex_lock(&data->update_lock);
960         data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
961         data->fan_ctl |= i << 4;
962         it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
963         mutex_unlock(&data->update_lock);
964
965         return count;
966 }
967 static ssize_t show_pwm_temp_map(struct device *dev,
968                 struct device_attribute *attr, char *buf)
969 {
970         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
971         int nr = sensor_attr->index;
972
973         struct it87_data *data = it87_update_device(dev);
974         int map;
975
976         if (data->pwm_temp_map[nr] < 3)
977                 map = 1 << data->pwm_temp_map[nr];
978         else
979                 map = 0;                        /* Should never happen */
980         return sprintf(buf, "%d\n", map);
981 }
982 static ssize_t set_pwm_temp_map(struct device *dev,
983                 struct device_attribute *attr, const char *buf, size_t count)
984 {
985         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
986         int nr = sensor_attr->index;
987
988         struct it87_data *data = dev_get_drvdata(dev);
989         long val;
990         u8 reg;
991
992         /*
993          * This check can go away if we ever support automatic fan speed
994          * control on newer chips.
995          */
996         if (!has_old_autopwm(data)) {
997                 dev_notice(dev, "Mapping change disabled for safety reasons\n");
998                 return -EINVAL;
999         }
1000
1001         if (kstrtol(buf, 10, &val) < 0)
1002                 return -EINVAL;
1003
1004         switch (val) {
1005         case (1 << 0):
1006                 reg = 0x00;
1007                 break;
1008         case (1 << 1):
1009                 reg = 0x01;
1010                 break;
1011         case (1 << 2):
1012                 reg = 0x02;
1013                 break;
1014         default:
1015                 return -EINVAL;
1016         }
1017
1018         mutex_lock(&data->update_lock);
1019         data->pwm_temp_map[nr] = reg;
1020         /*
1021          * If we are in automatic mode, write the temp mapping immediately;
1022          * otherwise, just store it for later use.
1023          */
1024         if (data->pwm_ctrl[nr] & 0x80) {
1025                 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1026                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1027         }
1028         mutex_unlock(&data->update_lock);
1029         return count;
1030 }
1031
1032 static ssize_t show_auto_pwm(struct device *dev,
1033                 struct device_attribute *attr, char *buf)
1034 {
1035         struct it87_data *data = it87_update_device(dev);
1036         struct sensor_device_attribute_2 *sensor_attr =
1037                         to_sensor_dev_attr_2(attr);
1038         int nr = sensor_attr->nr;
1039         int point = sensor_attr->index;
1040
1041         return sprintf(buf, "%d\n",
1042                        pwm_from_reg(data, data->auto_pwm[nr][point]));
1043 }
1044
1045 static ssize_t set_auto_pwm(struct device *dev,
1046                 struct device_attribute *attr, const char *buf, size_t count)
1047 {
1048         struct it87_data *data = dev_get_drvdata(dev);
1049         struct sensor_device_attribute_2 *sensor_attr =
1050                         to_sensor_dev_attr_2(attr);
1051         int nr = sensor_attr->nr;
1052         int point = sensor_attr->index;
1053         long val;
1054
1055         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1056                 return -EINVAL;
1057
1058         mutex_lock(&data->update_lock);
1059         data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1060         it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1061                          data->auto_pwm[nr][point]);
1062         mutex_unlock(&data->update_lock);
1063         return count;
1064 }
1065
1066 static ssize_t show_auto_temp(struct device *dev,
1067                 struct device_attribute *attr, char *buf)
1068 {
1069         struct it87_data *data = it87_update_device(dev);
1070         struct sensor_device_attribute_2 *sensor_attr =
1071                         to_sensor_dev_attr_2(attr);
1072         int nr = sensor_attr->nr;
1073         int point = sensor_attr->index;
1074
1075         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1076 }
1077
1078 static ssize_t set_auto_temp(struct device *dev,
1079                 struct device_attribute *attr, const char *buf, size_t count)
1080 {
1081         struct it87_data *data = dev_get_drvdata(dev);
1082         struct sensor_device_attribute_2 *sensor_attr =
1083                         to_sensor_dev_attr_2(attr);
1084         int nr = sensor_attr->nr;
1085         int point = sensor_attr->index;
1086         long val;
1087
1088         if (kstrtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1089                 return -EINVAL;
1090
1091         mutex_lock(&data->update_lock);
1092         data->auto_temp[nr][point] = TEMP_TO_REG(val);
1093         it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1094                          data->auto_temp[nr][point]);
1095         mutex_unlock(&data->update_lock);
1096         return count;
1097 }
1098
1099 static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_fan, NULL, 0, 0);
1100 static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1101                             0, 1);
1102 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, show_fan_div,
1103                           set_fan_div, 0);
1104
1105 static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_fan, NULL, 1, 0);
1106 static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1107                             1, 1);
1108 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, show_fan_div,
1109                           set_fan_div, 1);
1110
1111 static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_fan, NULL, 2, 0);
1112 static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1113                             2, 1);
1114 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR, show_fan_div,
1115                           set_fan_div, 2);
1116
1117 static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_fan, NULL, 3, 0);
1118 static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1119                             3, 1);
1120
1121 static SENSOR_DEVICE_ATTR_2(fan5_input, S_IRUGO, show_fan, NULL, 4, 0);
1122 static SENSOR_DEVICE_ATTR_2(fan5_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1123                             4, 1);
1124
1125 #define show_pwm_offset(offset)                                         \
1126 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR,      \
1127                 show_pwm_enable, set_pwm_enable, offset - 1);           \
1128 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR,               \
1129                 show_pwm, set_pwm, offset - 1);                         \
1130 static DEVICE_ATTR(pwm##offset##_freq,                                  \
1131                 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO),            \
1132                 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL));    \
1133 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp,             \
1134                 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \
1135                 offset - 1);                                            \
1136 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm,              \
1137                 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,         \
1138                 offset - 1, 0);                                         \
1139 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm,              \
1140                 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,         \
1141                 offset - 1, 1);                                         \
1142 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm,              \
1143                 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm,         \
1144                 offset - 1, 2);                                         \
1145 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm,              \
1146                 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3);           \
1147 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp,             \
1148                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1149                 offset - 1, 1);                                         \
1150 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst,        \
1151                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1152                 offset - 1, 0);                                         \
1153 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp,             \
1154                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1155                 offset - 1, 2);                                         \
1156 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp,             \
1157                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1158                 offset - 1, 3);                                         \
1159 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp,             \
1160                 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp,       \
1161                 offset - 1, 4);
1162
1163 show_pwm_offset(1);
1164 show_pwm_offset(2);
1165 show_pwm_offset(3);
1166
1167 /* Alarms */
1168 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1169                 char *buf)
1170 {
1171         struct it87_data *data = it87_update_device(dev);
1172         return sprintf(buf, "%u\n", data->alarms);
1173 }
1174 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1175
1176 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1177                 char *buf)
1178 {
1179         int bitnr = to_sensor_dev_attr(attr)->index;
1180         struct it87_data *data = it87_update_device(dev);
1181         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1182 }
1183
1184 static ssize_t clear_intrusion(struct device *dev, struct device_attribute
1185                 *attr, const char *buf, size_t count)
1186 {
1187         struct it87_data *data = dev_get_drvdata(dev);
1188         long val;
1189         int config;
1190
1191         if (kstrtol(buf, 10, &val) < 0 || val != 0)
1192                 return -EINVAL;
1193
1194         mutex_lock(&data->update_lock);
1195         config = it87_read_value(data, IT87_REG_CONFIG);
1196         if (config < 0) {
1197                 count = config;
1198         } else {
1199                 config |= 1 << 5;
1200                 it87_write_value(data, IT87_REG_CONFIG, config);
1201                 /* Invalidate cache to force re-read */
1202                 data->valid = 0;
1203         }
1204         mutex_unlock(&data->update_lock);
1205
1206         return count;
1207 }
1208
1209 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1210 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1211 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1212 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1213 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1214 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1215 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1216 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1217 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1218 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1219 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1220 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1221 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1222 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1223 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1224 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1225 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1226                           show_alarm, clear_intrusion, 4);
1227
1228 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1229                 char *buf)
1230 {
1231         int bitnr = to_sensor_dev_attr(attr)->index;
1232         struct it87_data *data = it87_update_device(dev);
1233         return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1234 }
1235 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1236                 const char *buf, size_t count)
1237 {
1238         int bitnr = to_sensor_dev_attr(attr)->index;
1239         struct it87_data *data = dev_get_drvdata(dev);
1240         long val;
1241
1242         if (kstrtol(buf, 10, &val) < 0
1243          || (val != 0 && val != 1))
1244                 return -EINVAL;
1245
1246         mutex_lock(&data->update_lock);
1247         data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1248         if (val)
1249                 data->beeps |= (1 << bitnr);
1250         else
1251                 data->beeps &= ~(1 << bitnr);
1252         it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1253         mutex_unlock(&data->update_lock);
1254         return count;
1255 }
1256
1257 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1258                           show_beep, set_beep, 1);
1259 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1260 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1261 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1262 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1263 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1264 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1265 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1266 /* fanX_beep writability is set later */
1267 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1268 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1269 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1270 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1271 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1272 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1273                           show_beep, set_beep, 2);
1274 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1275 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1276
1277 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1278                 char *buf)
1279 {
1280         struct it87_data *data = dev_get_drvdata(dev);
1281         return sprintf(buf, "%u\n", data->vrm);
1282 }
1283 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1284                 const char *buf, size_t count)
1285 {
1286         struct it87_data *data = dev_get_drvdata(dev);
1287         unsigned long val;
1288
1289         if (kstrtoul(buf, 10, &val) < 0)
1290                 return -EINVAL;
1291
1292         data->vrm = val;
1293
1294         return count;
1295 }
1296 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1297
1298 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1299                 char *buf)
1300 {
1301         struct it87_data *data = it87_update_device(dev);
1302         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1303 }
1304 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1305
1306 static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1307                 char *buf)
1308 {
1309         static const char * const labels[] = {
1310                 "+5V",
1311                 "5VSB",
1312                 "Vbat",
1313         };
1314         static const char * const labels_it8721[] = {
1315                 "+3.3V",
1316                 "3VSB",
1317                 "Vbat",
1318         };
1319         struct it87_data *data = dev_get_drvdata(dev);
1320         int nr = to_sensor_dev_attr(attr)->index;
1321
1322         return sprintf(buf, "%s\n", has_12mv_adc(data) ? labels_it8721[nr]
1323                                                        : labels[nr]);
1324 }
1325 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1326 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1327 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1328
1329 static ssize_t show_name(struct device *dev, struct device_attribute
1330                          *devattr, char *buf)
1331 {
1332         struct it87_data *data = dev_get_drvdata(dev);
1333         return sprintf(buf, "%s\n", data->name);
1334 }
1335 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1336
1337 static struct attribute *it87_attributes_in[9][5] = {
1338 {
1339         &sensor_dev_attr_in0_input.dev_attr.attr,
1340         &sensor_dev_attr_in0_min.dev_attr.attr,
1341         &sensor_dev_attr_in0_max.dev_attr.attr,
1342         &sensor_dev_attr_in0_alarm.dev_attr.attr,
1343         NULL
1344 }, {
1345         &sensor_dev_attr_in1_input.dev_attr.attr,
1346         &sensor_dev_attr_in1_min.dev_attr.attr,
1347         &sensor_dev_attr_in1_max.dev_attr.attr,
1348         &sensor_dev_attr_in1_alarm.dev_attr.attr,
1349         NULL
1350 }, {
1351         &sensor_dev_attr_in2_input.dev_attr.attr,
1352         &sensor_dev_attr_in2_min.dev_attr.attr,
1353         &sensor_dev_attr_in2_max.dev_attr.attr,
1354         &sensor_dev_attr_in2_alarm.dev_attr.attr,
1355         NULL
1356 }, {
1357         &sensor_dev_attr_in3_input.dev_attr.attr,
1358         &sensor_dev_attr_in3_min.dev_attr.attr,
1359         &sensor_dev_attr_in3_max.dev_attr.attr,
1360         &sensor_dev_attr_in3_alarm.dev_attr.attr,
1361         NULL
1362 }, {
1363         &sensor_dev_attr_in4_input.dev_attr.attr,
1364         &sensor_dev_attr_in4_min.dev_attr.attr,
1365         &sensor_dev_attr_in4_max.dev_attr.attr,
1366         &sensor_dev_attr_in4_alarm.dev_attr.attr,
1367         NULL
1368 }, {
1369         &sensor_dev_attr_in5_input.dev_attr.attr,
1370         &sensor_dev_attr_in5_min.dev_attr.attr,
1371         &sensor_dev_attr_in5_max.dev_attr.attr,
1372         &sensor_dev_attr_in5_alarm.dev_attr.attr,
1373         NULL
1374 }, {
1375         &sensor_dev_attr_in6_input.dev_attr.attr,
1376         &sensor_dev_attr_in6_min.dev_attr.attr,
1377         &sensor_dev_attr_in6_max.dev_attr.attr,
1378         &sensor_dev_attr_in6_alarm.dev_attr.attr,
1379         NULL
1380 }, {
1381         &sensor_dev_attr_in7_input.dev_attr.attr,
1382         &sensor_dev_attr_in7_min.dev_attr.attr,
1383         &sensor_dev_attr_in7_max.dev_attr.attr,
1384         &sensor_dev_attr_in7_alarm.dev_attr.attr,
1385         NULL
1386 }, {
1387         &sensor_dev_attr_in8_input.dev_attr.attr,
1388         NULL
1389 } };
1390
1391 static const struct attribute_group it87_group_in[9] = {
1392         { .attrs = it87_attributes_in[0] },
1393         { .attrs = it87_attributes_in[1] },
1394         { .attrs = it87_attributes_in[2] },
1395         { .attrs = it87_attributes_in[3] },
1396         { .attrs = it87_attributes_in[4] },
1397         { .attrs = it87_attributes_in[5] },
1398         { .attrs = it87_attributes_in[6] },
1399         { .attrs = it87_attributes_in[7] },
1400         { .attrs = it87_attributes_in[8] },
1401 };
1402
1403 static struct attribute *it87_attributes_temp[3][6] = {
1404 {
1405         &sensor_dev_attr_temp1_input.dev_attr.attr,
1406         &sensor_dev_attr_temp1_max.dev_attr.attr,
1407         &sensor_dev_attr_temp1_min.dev_attr.attr,
1408         &sensor_dev_attr_temp1_type.dev_attr.attr,
1409         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1410         NULL
1411 } , {
1412         &sensor_dev_attr_temp2_input.dev_attr.attr,
1413         &sensor_dev_attr_temp2_max.dev_attr.attr,
1414         &sensor_dev_attr_temp2_min.dev_attr.attr,
1415         &sensor_dev_attr_temp2_type.dev_attr.attr,
1416         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1417         NULL
1418 } , {
1419         &sensor_dev_attr_temp3_input.dev_attr.attr,
1420         &sensor_dev_attr_temp3_max.dev_attr.attr,
1421         &sensor_dev_attr_temp3_min.dev_attr.attr,
1422         &sensor_dev_attr_temp3_type.dev_attr.attr,
1423         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1424         NULL
1425 } };
1426
1427 static const struct attribute_group it87_group_temp[3] = {
1428         { .attrs = it87_attributes_temp[0] },
1429         { .attrs = it87_attributes_temp[1] },
1430         { .attrs = it87_attributes_temp[2] },
1431 };
1432
1433 static struct attribute *it87_attributes_temp_offset[] = {
1434         &sensor_dev_attr_temp1_offset.dev_attr.attr,
1435         &sensor_dev_attr_temp2_offset.dev_attr.attr,
1436         &sensor_dev_attr_temp3_offset.dev_attr.attr,
1437 };
1438
1439 static struct attribute *it87_attributes[] = {
1440         &dev_attr_alarms.attr,
1441         &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
1442         &dev_attr_name.attr,
1443         NULL
1444 };
1445
1446 static const struct attribute_group it87_group = {
1447         .attrs = it87_attributes,
1448 };
1449
1450 static struct attribute *it87_attributes_in_beep[] = {
1451         &sensor_dev_attr_in0_beep.dev_attr.attr,
1452         &sensor_dev_attr_in1_beep.dev_attr.attr,
1453         &sensor_dev_attr_in2_beep.dev_attr.attr,
1454         &sensor_dev_attr_in3_beep.dev_attr.attr,
1455         &sensor_dev_attr_in4_beep.dev_attr.attr,
1456         &sensor_dev_attr_in5_beep.dev_attr.attr,
1457         &sensor_dev_attr_in6_beep.dev_attr.attr,
1458         &sensor_dev_attr_in7_beep.dev_attr.attr,
1459         NULL
1460 };
1461
1462 static struct attribute *it87_attributes_temp_beep[] = {
1463         &sensor_dev_attr_temp1_beep.dev_attr.attr,
1464         &sensor_dev_attr_temp2_beep.dev_attr.attr,
1465         &sensor_dev_attr_temp3_beep.dev_attr.attr,
1466 };
1467
1468 static struct attribute *it87_attributes_fan[5][3+1] = { {
1469         &sensor_dev_attr_fan1_input.dev_attr.attr,
1470         &sensor_dev_attr_fan1_min.dev_attr.attr,
1471         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1472         NULL
1473 }, {
1474         &sensor_dev_attr_fan2_input.dev_attr.attr,
1475         &sensor_dev_attr_fan2_min.dev_attr.attr,
1476         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1477         NULL
1478 }, {
1479         &sensor_dev_attr_fan3_input.dev_attr.attr,
1480         &sensor_dev_attr_fan3_min.dev_attr.attr,
1481         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1482         NULL
1483 }, {
1484         &sensor_dev_attr_fan4_input.dev_attr.attr,
1485         &sensor_dev_attr_fan4_min.dev_attr.attr,
1486         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1487         NULL
1488 }, {
1489         &sensor_dev_attr_fan5_input.dev_attr.attr,
1490         &sensor_dev_attr_fan5_min.dev_attr.attr,
1491         &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1492         NULL
1493 } };
1494
1495 static const struct attribute_group it87_group_fan[5] = {
1496         { .attrs = it87_attributes_fan[0] },
1497         { .attrs = it87_attributes_fan[1] },
1498         { .attrs = it87_attributes_fan[2] },
1499         { .attrs = it87_attributes_fan[3] },
1500         { .attrs = it87_attributes_fan[4] },
1501 };
1502
1503 static const struct attribute *it87_attributes_fan_div[] = {
1504         &sensor_dev_attr_fan1_div.dev_attr.attr,
1505         &sensor_dev_attr_fan2_div.dev_attr.attr,
1506         &sensor_dev_attr_fan3_div.dev_attr.attr,
1507 };
1508
1509 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1510         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1511         &sensor_dev_attr_pwm1.dev_attr.attr,
1512         &dev_attr_pwm1_freq.attr,
1513         &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1514         NULL
1515 }, {
1516         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1517         &sensor_dev_attr_pwm2.dev_attr.attr,
1518         &dev_attr_pwm2_freq.attr,
1519         &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1520         NULL
1521 }, {
1522         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1523         &sensor_dev_attr_pwm3.dev_attr.attr,
1524         &dev_attr_pwm3_freq.attr,
1525         &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1526         NULL
1527 } };
1528
1529 static const struct attribute_group it87_group_pwm[3] = {
1530         { .attrs = it87_attributes_pwm[0] },
1531         { .attrs = it87_attributes_pwm[1] },
1532         { .attrs = it87_attributes_pwm[2] },
1533 };
1534
1535 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1536         &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1537         &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1538         &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1539         &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1540         &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1541         &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1542         &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1543         &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1544         &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1545         NULL
1546 }, {
1547         &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1548         &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1549         &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1550         &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1551         &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1552         &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1553         &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1554         &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1555         &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1556         NULL
1557 }, {
1558         &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1559         &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1560         &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1561         &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1562         &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1563         &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1564         &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1565         &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1566         &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1567         NULL
1568 } };
1569
1570 static const struct attribute_group it87_group_autopwm[3] = {
1571         { .attrs = it87_attributes_autopwm[0] },
1572         { .attrs = it87_attributes_autopwm[1] },
1573         { .attrs = it87_attributes_autopwm[2] },
1574 };
1575
1576 static struct attribute *it87_attributes_fan_beep[] = {
1577         &sensor_dev_attr_fan1_beep.dev_attr.attr,
1578         &sensor_dev_attr_fan2_beep.dev_attr.attr,
1579         &sensor_dev_attr_fan3_beep.dev_attr.attr,
1580         &sensor_dev_attr_fan4_beep.dev_attr.attr,
1581         &sensor_dev_attr_fan5_beep.dev_attr.attr,
1582 };
1583
1584 static struct attribute *it87_attributes_vid[] = {
1585         &dev_attr_vrm.attr,
1586         &dev_attr_cpu0_vid.attr,
1587         NULL
1588 };
1589
1590 static const struct attribute_group it87_group_vid = {
1591         .attrs = it87_attributes_vid,
1592 };
1593
1594 static struct attribute *it87_attributes_label[] = {
1595         &sensor_dev_attr_in3_label.dev_attr.attr,
1596         &sensor_dev_attr_in7_label.dev_attr.attr,
1597         &sensor_dev_attr_in8_label.dev_attr.attr,
1598         NULL
1599 };
1600
1601 static const struct attribute_group it87_group_label = {
1602         .attrs = it87_attributes_label,
1603 };
1604
1605 /* SuperIO detection - will change isa_address if a chip is found */
1606 static int __init it87_find(unsigned short *address,
1607         struct it87_sio_data *sio_data)
1608 {
1609         int err;
1610         u16 chip_type;
1611         const char *board_vendor, *board_name;
1612
1613         err = superio_enter();
1614         if (err)
1615                 return err;
1616
1617         err = -ENODEV;
1618         chip_type = force_id ? force_id : superio_inw(DEVID);
1619
1620         switch (chip_type) {
1621         case IT8705F_DEVID:
1622                 sio_data->type = it87;
1623                 break;
1624         case IT8712F_DEVID:
1625                 sio_data->type = it8712;
1626                 break;
1627         case IT8716F_DEVID:
1628         case IT8726F_DEVID:
1629                 sio_data->type = it8716;
1630                 break;
1631         case IT8718F_DEVID:
1632                 sio_data->type = it8718;
1633                 break;
1634         case IT8720F_DEVID:
1635                 sio_data->type = it8720;
1636                 break;
1637         case IT8721F_DEVID:
1638                 sio_data->type = it8721;
1639                 break;
1640         case IT8728F_DEVID:
1641                 sio_data->type = it8728;
1642                 break;
1643         case IT8782F_DEVID:
1644                 sio_data->type = it8782;
1645                 break;
1646         case IT8783E_DEVID:
1647                 sio_data->type = it8783;
1648                 break;
1649         case 0xffff:    /* No device at all */
1650                 goto exit;
1651         default:
1652                 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1653                 goto exit;
1654         }
1655
1656         superio_select(PME);
1657         if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1658                 pr_info("Device not activated, skipping\n");
1659                 goto exit;
1660         }
1661
1662         *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1663         if (*address == 0) {
1664                 pr_info("Base address not set, skipping\n");
1665                 goto exit;
1666         }
1667
1668         err = 0;
1669         sio_data->revision = superio_inb(DEVREV) & 0x0f;
1670         pr_info("Found IT%04xF chip at 0x%x, revision %d\n",
1671                 chip_type, *address, sio_data->revision);
1672
1673         /* in8 (Vbat) is always internal */
1674         sio_data->internal = (1 << 2);
1675
1676         /* Read GPIO config and VID value from LDN 7 (GPIO) */
1677         if (sio_data->type == it87) {
1678                 /* The IT8705F doesn't have VID pins at all */
1679                 sio_data->skip_vid = 1;
1680
1681                 /* The IT8705F has a different LD number for GPIO */
1682                 superio_select(5);
1683                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1684         } else if (sio_data->type == it8783) {
1685                 int reg25, reg27, reg2A, reg2C, regEF;
1686
1687                 sio_data->skip_vid = 1; /* No VID */
1688
1689                 superio_select(GPIO);
1690
1691                 reg25 = superio_inb(IT87_SIO_GPIO1_REG);
1692                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1693                 reg2A = superio_inb(IT87_SIO_PINX1_REG);
1694                 reg2C = superio_inb(IT87_SIO_PINX2_REG);
1695                 regEF = superio_inb(IT87_SIO_SPI_REG);
1696
1697                 /* Check if fan3 is there or not */
1698                 if ((reg27 & (1 << 0)) || !(reg2C & (1 << 2)))
1699                         sio_data->skip_fan |= (1 << 2);
1700                 if ((reg25 & (1 << 4))
1701                     || (!(reg2A & (1 << 1)) && (regEF & (1 << 0))))
1702                         sio_data->skip_pwm |= (1 << 2);
1703
1704                 /* Check if fan2 is there or not */
1705                 if (reg27 & (1 << 7))
1706                         sio_data->skip_fan |= (1 << 1);
1707                 if (reg27 & (1 << 3))
1708                         sio_data->skip_pwm |= (1 << 1);
1709
1710                 /* VIN5 */
1711                 if ((reg27 & (1 << 0)) || (reg2C & (1 << 2)))
1712                         sio_data->skip_in |= (1 << 5); /* No VIN5 */
1713
1714                 /* VIN6 */
1715                 if (reg27 & (1 << 1))
1716                         sio_data->skip_in |= (1 << 6); /* No VIN6 */
1717
1718                 /*
1719                  * VIN7
1720                  * Does not depend on bit 2 of Reg2C, contrary to datasheet.
1721                  */
1722                 if (reg27 & (1 << 2)) {
1723                         /*
1724                          * The data sheet is a bit unclear regarding the
1725                          * internal voltage divider for VCCH5V. It says
1726                          * "This bit enables and switches VIN7 (pin 91) to the
1727                          * internal voltage divider for VCCH5V".
1728                          * This is different to other chips, where the internal
1729                          * voltage divider would connect VIN7 to an internal
1730                          * voltage source. Maybe that is the case here as well.
1731                          *
1732                          * Since we don't know for sure, re-route it if that is
1733                          * not the case, and ask the user to report if the
1734                          * resulting voltage is sane.
1735                          */
1736                         if (!(reg2C & (1 << 1))) {
1737                                 reg2C |= (1 << 1);
1738                                 superio_outb(IT87_SIO_PINX2_REG, reg2C);
1739                                 pr_notice("Routing internal VCCH5V to in7.\n");
1740                         }
1741                         pr_notice("in7 routed to internal voltage divider, with external pin disabled.\n");
1742                         pr_notice("Please report if it displays a reasonable voltage.\n");
1743                 }
1744
1745                 if (reg2C & (1 << 0))
1746                         sio_data->internal |= (1 << 0);
1747                 if (reg2C & (1 << 1))
1748                         sio_data->internal |= (1 << 1);
1749
1750                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1751
1752         } else {
1753                 int reg;
1754                 bool uart6;
1755
1756                 superio_select(GPIO);
1757
1758                 reg = superio_inb(IT87_SIO_GPIO3_REG);
1759                 if (sio_data->type == it8721 || sio_data->type == it8728 ||
1760                     sio_data->type == it8782) {
1761                         /*
1762                          * IT8721F/IT8758E, and IT8782F don't have VID pins
1763                          * at all, not sure about the IT8728F.
1764                          */
1765                         sio_data->skip_vid = 1;
1766                 } else {
1767                         /* We need at least 4 VID pins */
1768                         if (reg & 0x0f) {
1769                                 pr_info("VID is disabled (pins used for GPIO)\n");
1770                                 sio_data->skip_vid = 1;
1771                         }
1772                 }
1773
1774                 /* Check if fan3 is there or not */
1775                 if (reg & (1 << 6))
1776                         sio_data->skip_pwm |= (1 << 2);
1777                 if (reg & (1 << 7))
1778                         sio_data->skip_fan |= (1 << 2);
1779
1780                 /* Check if fan2 is there or not */
1781                 reg = superio_inb(IT87_SIO_GPIO5_REG);
1782                 if (reg & (1 << 1))
1783                         sio_data->skip_pwm |= (1 << 1);
1784                 if (reg & (1 << 2))
1785                         sio_data->skip_fan |= (1 << 1);
1786
1787                 if ((sio_data->type == it8718 || sio_data->type == it8720)
1788                  && !(sio_data->skip_vid))
1789                         sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1790
1791                 reg = superio_inb(IT87_SIO_PINX2_REG);
1792
1793                 uart6 = sio_data->type == it8782 && (reg & (1 << 2));
1794
1795                 /*
1796                  * The IT8720F has no VIN7 pin, so VCCH should always be
1797                  * routed internally to VIN7 with an internal divider.
1798                  * Curiously, there still is a configuration bit to control
1799                  * this, which means it can be set incorrectly. And even
1800                  * more curiously, many boards out there are improperly
1801                  * configured, even though the IT8720F datasheet claims
1802                  * that the internal routing of VCCH to VIN7 is the default
1803                  * setting. So we force the internal routing in this case.
1804                  *
1805                  * On IT8782F, VIN7 is multiplexed with one of the UART6 pins.
1806                  * If UART6 is enabled, re-route VIN7 to the internal divider
1807                  * if that is not already the case.
1808                  */
1809                 if ((sio_data->type == it8720 || uart6) && !(reg & (1 << 1))) {
1810                         reg |= (1 << 1);
1811                         superio_outb(IT87_SIO_PINX2_REG, reg);
1812                         pr_notice("Routing internal VCCH to in7\n");
1813                 }
1814                 if (reg & (1 << 0))
1815                         sio_data->internal |= (1 << 0);
1816                 if ((reg & (1 << 1)) || sio_data->type == it8721 ||
1817                     sio_data->type == it8728)
1818                         sio_data->internal |= (1 << 1);
1819
1820                 /*
1821                  * On IT8782F, UART6 pins overlap with VIN5, VIN6, and VIN7.
1822                  * While VIN7 can be routed to the internal voltage divider,
1823                  * VIN5 and VIN6 are not available if UART6 is enabled.
1824                  *
1825                  * Also, temp3 is not available if UART6 is enabled and TEMPIN3
1826                  * is the temperature source. Since we can not read the
1827                  * temperature source here, skip_temp is preliminary.
1828                  */
1829                 if (uart6) {
1830                         sio_data->skip_in |= (1 << 5) | (1 << 6);
1831                         sio_data->skip_temp |= (1 << 2);
1832                 }
1833
1834                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1835         }
1836         if (sio_data->beep_pin)
1837                 pr_info("Beeping is supported\n");
1838
1839         /* Disable specific features based on DMI strings */
1840         board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1841         board_name = dmi_get_system_info(DMI_BOARD_NAME);
1842         if (board_vendor && board_name) {
1843                 if (strcmp(board_vendor, "nVIDIA") == 0
1844                  && strcmp(board_name, "FN68PT") == 0) {
1845                         /*
1846                          * On the Shuttle SN68PT, FAN_CTL2 is apparently not
1847                          * connected to a fan, but to something else. One user
1848                          * has reported instant system power-off when changing
1849                          * the PWM2 duty cycle, so we disable it.
1850                          * I use the board name string as the trigger in case
1851                          * the same board is ever used in other systems.
1852                          */
1853                         pr_info("Disabling pwm2 due to hardware constraints\n");
1854                         sio_data->skip_pwm = (1 << 1);
1855                 }
1856         }
1857
1858 exit:
1859         superio_exit();
1860         return err;
1861 }
1862
1863 static void it87_remove_files(struct device *dev)
1864 {
1865         struct it87_data *data = platform_get_drvdata(pdev);
1866         struct it87_sio_data *sio_data = dev->platform_data;
1867         int i;
1868
1869         sysfs_remove_group(&dev->kobj, &it87_group);
1870         for (i = 0; i < 9; i++) {
1871                 if (sio_data->skip_in & (1 << i))
1872                         continue;
1873                 sysfs_remove_group(&dev->kobj, &it87_group_in[i]);
1874                 if (it87_attributes_in_beep[i])
1875                         sysfs_remove_file(&dev->kobj,
1876                                           it87_attributes_in_beep[i]);
1877         }
1878         for (i = 0; i < 3; i++) {
1879                 if (!(data->has_temp & (1 << i)))
1880                         continue;
1881                 sysfs_remove_group(&dev->kobj, &it87_group_temp[i]);
1882                 if (has_temp_offset(data))
1883                         sysfs_remove_file(&dev->kobj,
1884                                           it87_attributes_temp_offset[i]);
1885                 if (sio_data->beep_pin)
1886                         sysfs_remove_file(&dev->kobj,
1887                                           it87_attributes_temp_beep[i]);
1888         }
1889         for (i = 0; i < 5; i++) {
1890                 if (!(data->has_fan & (1 << i)))
1891                         continue;
1892                 sysfs_remove_group(&dev->kobj, &it87_group_fan[i]);
1893                 if (sio_data->beep_pin)
1894                         sysfs_remove_file(&dev->kobj,
1895                                           it87_attributes_fan_beep[i]);
1896                 if (i < 3 && !has_16bit_fans(data))
1897                         sysfs_remove_file(&dev->kobj,
1898                                           it87_attributes_fan_div[i]);
1899         }
1900         for (i = 0; i < 3; i++) {
1901                 if (sio_data->skip_pwm & (1 << 0))
1902                         continue;
1903                 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
1904                 if (has_old_autopwm(data))
1905                         sysfs_remove_group(&dev->kobj,
1906                                            &it87_group_autopwm[i]);
1907         }
1908         if (!sio_data->skip_vid)
1909                 sysfs_remove_group(&dev->kobj, &it87_group_vid);
1910         sysfs_remove_group(&dev->kobj, &it87_group_label);
1911 }
1912
1913 static int it87_probe(struct platform_device *pdev)
1914 {
1915         struct it87_data *data;
1916         struct resource *res;
1917         struct device *dev = &pdev->dev;
1918         struct it87_sio_data *sio_data = dev->platform_data;
1919         int err = 0, i;
1920         int enable_pwm_interface;
1921         int fan_beep_need_rw;
1922         static const char * const names[] = {
1923                 "it87",
1924                 "it8712",
1925                 "it8716",
1926                 "it8718",
1927                 "it8720",
1928                 "it8721",
1929                 "it8728",
1930                 "it8782",
1931                 "it8783",
1932         };
1933
1934         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1935         if (!devm_request_region(&pdev->dev, res->start, IT87_EC_EXTENT,
1936                                  DRVNAME)) {
1937                 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1938                         (unsigned long)res->start,
1939                         (unsigned long)(res->start + IT87_EC_EXTENT - 1));
1940                 return -EBUSY;
1941         }
1942
1943         data = devm_kzalloc(&pdev->dev, sizeof(struct it87_data), GFP_KERNEL);
1944         if (!data)
1945                 return -ENOMEM;
1946
1947         data->addr = res->start;
1948         data->type = sio_data->type;
1949         data->revision = sio_data->revision;
1950         data->name = names[sio_data->type];
1951
1952         /* Now, we do the remaining detection. */
1953         if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1954          || it87_read_value(data, IT87_REG_CHIPID) != 0x90)
1955                 return -ENODEV;
1956
1957         platform_set_drvdata(pdev, data);
1958
1959         mutex_init(&data->update_lock);
1960
1961         /* Check PWM configuration */
1962         enable_pwm_interface = it87_check_pwm(dev);
1963
1964         /* Starting with IT8721F, we handle scaling of internal voltages */
1965         if (has_12mv_adc(data)) {
1966                 if (sio_data->internal & (1 << 0))
1967                         data->in_scaled |= (1 << 3);    /* in3 is AVCC */
1968                 if (sio_data->internal & (1 << 1))
1969                         data->in_scaled |= (1 << 7);    /* in7 is VSB */
1970                 if (sio_data->internal & (1 << 2))
1971                         data->in_scaled |= (1 << 8);    /* in8 is Vbat */
1972         } else if (sio_data->type == it8782 || sio_data->type == it8783) {
1973                 if (sio_data->internal & (1 << 0))
1974                         data->in_scaled |= (1 << 3);    /* in3 is VCC5V */
1975                 if (sio_data->internal & (1 << 1))
1976                         data->in_scaled |= (1 << 7);    /* in7 is VCCH5V */
1977         }
1978
1979         data->has_temp = 0x07;
1980         if (sio_data->skip_temp & (1 << 2)) {
1981                 if (sio_data->type == it8782
1982                     && !(it87_read_value(data, IT87_REG_TEMP_EXTRA) & 0x80))
1983                         data->has_temp &= ~(1 << 2);
1984         }
1985
1986         /* Initialize the IT87 chip */
1987         it87_init_device(pdev);
1988
1989         /* Register sysfs hooks */
1990         err = sysfs_create_group(&dev->kobj, &it87_group);
1991         if (err)
1992                 return err;
1993
1994         for (i = 0; i < 9; i++) {
1995                 if (sio_data->skip_in & (1 << i))
1996                         continue;
1997                 err = sysfs_create_group(&dev->kobj, &it87_group_in[i]);
1998                 if (err)
1999                         goto error;
2000                 if (sio_data->beep_pin && it87_attributes_in_beep[i]) {
2001                         err = sysfs_create_file(&dev->kobj,
2002                                                 it87_attributes_in_beep[i]);
2003                         if (err)
2004                                 goto error;
2005                 }
2006         }
2007
2008         for (i = 0; i < 3; i++) {
2009                 if (!(data->has_temp & (1 << i)))
2010                         continue;
2011                 err = sysfs_create_group(&dev->kobj, &it87_group_temp[i]);
2012                 if (err)
2013                         goto error;
2014                 if (has_temp_offset(data)) {
2015                         err = sysfs_create_file(&dev->kobj,
2016                                                 it87_attributes_temp_offset[i]);
2017                         if (err)
2018                                 goto error;
2019                 }
2020                 if (sio_data->beep_pin) {
2021                         err = sysfs_create_file(&dev->kobj,
2022                                                 it87_attributes_temp_beep[i]);
2023                         if (err)
2024                                 goto error;
2025                 }
2026         }
2027
2028         /* Do not create fan files for disabled fans */
2029         fan_beep_need_rw = 1;
2030         for (i = 0; i < 5; i++) {
2031                 if (!(data->has_fan & (1 << i)))
2032                         continue;
2033                 err = sysfs_create_group(&dev->kobj, &it87_group_fan[i]);
2034                 if (err)
2035                         goto error;
2036
2037                 if (i < 3 && !has_16bit_fans(data)) {
2038                         err = sysfs_create_file(&dev->kobj,
2039                                                 it87_attributes_fan_div[i]);
2040                         if (err)
2041                                 goto error;
2042                 }
2043
2044                 if (sio_data->beep_pin) {
2045                         err = sysfs_create_file(&dev->kobj,
2046                                                 it87_attributes_fan_beep[i]);
2047                         if (err)
2048                                 goto error;
2049                         if (!fan_beep_need_rw)
2050                                 continue;
2051
2052                         /*
2053                          * As we have a single beep enable bit for all fans,
2054                          * only the first enabled fan has a writable attribute
2055                          * for it.
2056                          */
2057                         if (sysfs_chmod_file(&dev->kobj,
2058                                              it87_attributes_fan_beep[i],
2059                                              S_IRUGO | S_IWUSR))
2060                                 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
2061                                         i + 1);
2062                         fan_beep_need_rw = 0;
2063                 }
2064         }
2065
2066         if (enable_pwm_interface) {
2067                 for (i = 0; i < 3; i++) {
2068                         if (sio_data->skip_pwm & (1 << i))
2069                                 continue;
2070                         err = sysfs_create_group(&dev->kobj,
2071                                                  &it87_group_pwm[i]);
2072                         if (err)
2073                                 goto error;
2074
2075                         if (!has_old_autopwm(data))
2076                                 continue;
2077                         err = sysfs_create_group(&dev->kobj,
2078                                                  &it87_group_autopwm[i]);
2079                         if (err)
2080                                 goto error;
2081                 }
2082         }
2083
2084         if (!sio_data->skip_vid) {
2085                 data->vrm = vid_which_vrm();
2086                 /* VID reading from Super-I/O config space if available */
2087                 data->vid = sio_data->vid_value;
2088                 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
2089                 if (err)
2090                         goto error;
2091         }
2092
2093         /* Export labels for internal sensors */
2094         for (i = 0; i < 3; i++) {
2095                 if (!(sio_data->internal & (1 << i)))
2096                         continue;
2097                 err = sysfs_create_file(&dev->kobj,
2098                                         it87_attributes_label[i]);
2099                 if (err)
2100                         goto error;
2101         }
2102
2103         data->hwmon_dev = hwmon_device_register(dev);
2104         if (IS_ERR(data->hwmon_dev)) {
2105                 err = PTR_ERR(data->hwmon_dev);
2106                 goto error;
2107         }
2108
2109         return 0;
2110
2111 error:
2112         it87_remove_files(dev);
2113         return err;
2114 }
2115
2116 static int it87_remove(struct platform_device *pdev)
2117 {
2118         struct it87_data *data = platform_get_drvdata(pdev);
2119
2120         hwmon_device_unregister(data->hwmon_dev);
2121         it87_remove_files(&pdev->dev);
2122
2123         return 0;
2124 }
2125
2126 /*
2127  * Must be called with data->update_lock held, except during initialization.
2128  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2129  * would slow down the IT87 access and should not be necessary.
2130  */
2131 static int it87_read_value(struct it87_data *data, u8 reg)
2132 {
2133         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2134         return inb_p(data->addr + IT87_DATA_REG_OFFSET);
2135 }
2136
2137 /*
2138  * Must be called with data->update_lock held, except during initialization.
2139  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2140  * would slow down the IT87 access and should not be necessary.
2141  */
2142 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
2143 {
2144         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2145         outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
2146 }
2147
2148 /* Return 1 if and only if the PWM interface is safe to use */
2149 static int it87_check_pwm(struct device *dev)
2150 {
2151         struct it87_data *data = dev_get_drvdata(dev);
2152         /*
2153          * Some BIOSes fail to correctly configure the IT87 fans. All fans off
2154          * and polarity set to active low is sign that this is the case so we
2155          * disable pwm control to protect the user.
2156          */
2157         int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
2158         if ((tmp & 0x87) == 0) {
2159                 if (fix_pwm_polarity) {
2160                         /*
2161                          * The user asks us to attempt a chip reconfiguration.
2162                          * This means switching to active high polarity and
2163                          * inverting all fan speed values.
2164                          */
2165                         int i;
2166                         u8 pwm[3];
2167
2168                         for (i = 0; i < 3; i++)
2169                                 pwm[i] = it87_read_value(data,
2170                                                          IT87_REG_PWM(i));
2171
2172                         /*
2173                          * If any fan is in automatic pwm mode, the polarity
2174                          * might be correct, as suspicious as it seems, so we
2175                          * better don't change anything (but still disable the
2176                          * PWM interface).
2177                          */
2178                         if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
2179                                 dev_info(dev, "Reconfiguring PWM to "
2180                                          "active high polarity\n");
2181                                 it87_write_value(data, IT87_REG_FAN_CTL,
2182                                                  tmp | 0x87);
2183                                 for (i = 0; i < 3; i++)
2184                                         it87_write_value(data,
2185                                                          IT87_REG_PWM(i),
2186                                                          0x7f & ~pwm[i]);
2187                                 return 1;
2188                         }
2189
2190                         dev_info(dev, "PWM configuration is "
2191                                  "too broken to be fixed\n");
2192                 }
2193
2194                 dev_info(dev, "Detected broken BIOS "
2195                          "defaults, disabling PWM interface\n");
2196                 return 0;
2197         } else if (fix_pwm_polarity) {
2198                 dev_info(dev, "PWM configuration looks "
2199                          "sane, won't touch\n");
2200         }
2201
2202         return 1;
2203 }
2204
2205 /* Called when we have found a new IT87. */
2206 static void it87_init_device(struct platform_device *pdev)
2207 {
2208         struct it87_sio_data *sio_data = pdev->dev.platform_data;
2209         struct it87_data *data = platform_get_drvdata(pdev);
2210         int tmp, i;
2211         u8 mask;
2212
2213         /*
2214          * For each PWM channel:
2215          * - If it is in automatic mode, setting to manual mode should set
2216          *   the fan to full speed by default.
2217          * - If it is in manual mode, we need a mapping to temperature
2218          *   channels to use when later setting to automatic mode later.
2219          *   Use a 1:1 mapping by default (we are clueless.)
2220          * In both cases, the value can (and should) be changed by the user
2221          * prior to switching to a different mode.
2222          * Note that this is no longer needed for the IT8721F and later, as
2223          * these have separate registers for the temperature mapping and the
2224          * manual duty cycle.
2225          */
2226         for (i = 0; i < 3; i++) {
2227                 data->pwm_temp_map[i] = i;
2228                 data->pwm_duty[i] = 0x7f;       /* Full speed */
2229                 data->auto_pwm[i][3] = 0x7f;    /* Full speed, hard-coded */
2230         }
2231
2232         /*
2233          * Some chips seem to have default value 0xff for all limit
2234          * registers. For low voltage limits it makes no sense and triggers
2235          * alarms, so change to 0 instead. For high temperature limits, it
2236          * means -1 degree C, which surprisingly doesn't trigger an alarm,
2237          * but is still confusing, so change to 127 degrees C.
2238          */
2239         for (i = 0; i < 8; i++) {
2240                 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
2241                 if (tmp == 0xff)
2242                         it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2243         }
2244         for (i = 0; i < 3; i++) {
2245                 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2246                 if (tmp == 0xff)
2247                         it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2248         }
2249
2250         /*
2251          * Temperature channels are not forcibly enabled, as they can be
2252          * set to two different sensor types and we can't guess which one
2253          * is correct for a given system. These channels can be enabled at
2254          * run-time through the temp{1-3}_type sysfs accessors if needed.
2255          */
2256
2257         /* Check if voltage monitors are reset manually or by some reason */
2258         tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2259         if ((tmp & 0xff) == 0) {
2260                 /* Enable all voltage monitors */
2261                 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2262         }
2263
2264         /* Check if tachometers are reset manually or by some reason */
2265         mask = 0x70 & ~(sio_data->skip_fan << 4);
2266         data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2267         if ((data->fan_main_ctrl & mask) == 0) {
2268                 /* Enable all fan tachometers */
2269                 data->fan_main_ctrl |= mask;
2270                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2271                                  data->fan_main_ctrl);
2272         }
2273         data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2274
2275         /* Set tachometers to 16-bit mode if needed */
2276         if (has_16bit_fans(data)) {
2277                 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2278                 if (~tmp & 0x07 & data->has_fan) {
2279                         dev_dbg(&pdev->dev,
2280                                 "Setting fan1-3 to 16-bit mode\n");
2281                         it87_write_value(data, IT87_REG_FAN_16BIT,
2282                                          tmp | 0x07);
2283                 }
2284                 /* IT8705F, IT8782F, and IT8783E/F only support three fans. */
2285                 if (data->type != it87 && data->type != it8782 &&
2286                     data->type != it8783) {
2287                         if (tmp & (1 << 4))
2288                                 data->has_fan |= (1 << 3); /* fan4 enabled */
2289                         if (tmp & (1 << 5))
2290                                 data->has_fan |= (1 << 4); /* fan5 enabled */
2291                 }
2292         }
2293
2294         /* Fan input pins may be used for alternative functions */
2295         data->has_fan &= ~sio_data->skip_fan;
2296
2297         /* Start monitoring */
2298         it87_write_value(data, IT87_REG_CONFIG,
2299                          (it87_read_value(data, IT87_REG_CONFIG) & 0x3e)
2300                          | (update_vbat ? 0x41 : 0x01));
2301 }
2302
2303 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2304 {
2305         data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2306         if (has_newer_autopwm(data)) {
2307                 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2308                 data->pwm_duty[nr] = it87_read_value(data,
2309                                                      IT87_REG_PWM_DUTY(nr));
2310         } else {
2311                 if (data->pwm_ctrl[nr] & 0x80)  /* Automatic mode */
2312                         data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2313                 else                            /* Manual mode */
2314                         data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2315         }
2316
2317         if (has_old_autopwm(data)) {
2318                 int i;
2319
2320                 for (i = 0; i < 5 ; i++)
2321                         data->auto_temp[nr][i] = it87_read_value(data,
2322                                                 IT87_REG_AUTO_TEMP(nr, i));
2323                 for (i = 0; i < 3 ; i++)
2324                         data->auto_pwm[nr][i] = it87_read_value(data,
2325                                                 IT87_REG_AUTO_PWM(nr, i));
2326         }
2327 }
2328
2329 static struct it87_data *it87_update_device(struct device *dev)
2330 {
2331         struct it87_data *data = dev_get_drvdata(dev);
2332         int i;
2333
2334         mutex_lock(&data->update_lock);
2335
2336         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2337             || !data->valid) {
2338                 if (update_vbat) {
2339                         /*
2340                          * Cleared after each update, so reenable.  Value
2341                          * returned by this read will be previous value
2342                          */
2343                         it87_write_value(data, IT87_REG_CONFIG,
2344                                 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2345                 }
2346                 for (i = 0; i <= 7; i++) {
2347                         data->in[i][0] =
2348                                 it87_read_value(data, IT87_REG_VIN(i));
2349                         data->in[i][1] =
2350                                 it87_read_value(data, IT87_REG_VIN_MIN(i));
2351                         data->in[i][2] =
2352                                 it87_read_value(data, IT87_REG_VIN_MAX(i));
2353                 }
2354                 /* in8 (battery) has no limit registers */
2355                 data->in[8][0] = it87_read_value(data, IT87_REG_VIN(8));
2356
2357                 for (i = 0; i < 5; i++) {
2358                         /* Skip disabled fans */
2359                         if (!(data->has_fan & (1 << i)))
2360                                 continue;
2361
2362                         data->fan[i][1] =
2363                                 it87_read_value(data, IT87_REG_FAN_MIN[i]);
2364                         data->fan[i][0] = it87_read_value(data,
2365                                        IT87_REG_FAN[i]);
2366                         /* Add high byte if in 16-bit mode */
2367                         if (has_16bit_fans(data)) {
2368                                 data->fan[i][0] |= it87_read_value(data,
2369                                                 IT87_REG_FANX[i]) << 8;
2370                                 data->fan[i][1] |= it87_read_value(data,
2371                                                 IT87_REG_FANX_MIN[i]) << 8;
2372                         }
2373                 }
2374                 for (i = 0; i < 3; i++) {
2375                         if (!(data->has_temp & (1 << i)))
2376                                 continue;
2377                         data->temp[i][0] =
2378                                 it87_read_value(data, IT87_REG_TEMP(i));
2379                         data->temp[i][1] =
2380                                 it87_read_value(data, IT87_REG_TEMP_LOW(i));
2381                         data->temp[i][2] =
2382                                 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2383                         if (has_temp_offset(data))
2384                                 data->temp[i][3] =
2385                                   it87_read_value(data,
2386                                                   IT87_REG_TEMP_OFFSET[i]);
2387                 }
2388
2389                 /* Newer chips don't have clock dividers */
2390                 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2391                         i = it87_read_value(data, IT87_REG_FAN_DIV);
2392                         data->fan_div[0] = i & 0x07;
2393                         data->fan_div[1] = (i >> 3) & 0x07;
2394                         data->fan_div[2] = (i & 0x40) ? 3 : 1;
2395                 }
2396
2397                 data->alarms =
2398                         it87_read_value(data, IT87_REG_ALARM1) |
2399                         (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2400                         (it87_read_value(data, IT87_REG_ALARM3) << 16);
2401                 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2402
2403                 data->fan_main_ctrl = it87_read_value(data,
2404                                 IT87_REG_FAN_MAIN_CTRL);
2405                 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2406                 for (i = 0; i < 3; i++)
2407                         it87_update_pwm_ctrl(data, i);
2408
2409                 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2410                 /*
2411                  * The IT8705F does not have VID capability.
2412                  * The IT8718F and later don't use IT87_REG_VID for the
2413                  * same purpose.
2414                  */
2415                 if (data->type == it8712 || data->type == it8716) {
2416                         data->vid = it87_read_value(data, IT87_REG_VID);
2417                         /*
2418                          * The older IT8712F revisions had only 5 VID pins,
2419                          * but we assume it is always safe to read 6 bits.
2420                          */
2421                         data->vid &= 0x3f;
2422                 }
2423                 data->last_updated = jiffies;
2424                 data->valid = 1;
2425         }
2426
2427         mutex_unlock(&data->update_lock);
2428
2429         return data;
2430 }
2431
2432 static int __init it87_device_add(unsigned short address,
2433                                   const struct it87_sio_data *sio_data)
2434 {
2435         struct resource res = {
2436                 .start  = address + IT87_EC_OFFSET,
2437                 .end    = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2438                 .name   = DRVNAME,
2439                 .flags  = IORESOURCE_IO,
2440         };
2441         int err;
2442
2443         err = acpi_check_resource_conflict(&res);
2444         if (err)
2445                 goto exit;
2446
2447         pdev = platform_device_alloc(DRVNAME, address);
2448         if (!pdev) {
2449                 err = -ENOMEM;
2450                 pr_err("Device allocation failed\n");
2451                 goto exit;
2452         }
2453
2454         err = platform_device_add_resources(pdev, &res, 1);
2455         if (err) {
2456                 pr_err("Device resource addition failed (%d)\n", err);
2457                 goto exit_device_put;
2458         }
2459
2460         err = platform_device_add_data(pdev, sio_data,
2461                                        sizeof(struct it87_sio_data));
2462         if (err) {
2463                 pr_err("Platform data allocation failed\n");
2464                 goto exit_device_put;
2465         }
2466
2467         err = platform_device_add(pdev);
2468         if (err) {
2469                 pr_err("Device addition failed (%d)\n", err);
2470                 goto exit_device_put;
2471         }
2472
2473         return 0;
2474
2475 exit_device_put:
2476         platform_device_put(pdev);
2477 exit:
2478         return err;
2479 }
2480
2481 static int __init sm_it87_init(void)
2482 {
2483         int err;
2484         unsigned short isa_address = 0;
2485         struct it87_sio_data sio_data;
2486
2487         memset(&sio_data, 0, sizeof(struct it87_sio_data));
2488         err = it87_find(&isa_address, &sio_data);
2489         if (err)
2490                 return err;
2491         err = platform_driver_register(&it87_driver);
2492         if (err)
2493                 return err;
2494
2495         err = it87_device_add(isa_address, &sio_data);
2496         if (err) {
2497                 platform_driver_unregister(&it87_driver);
2498                 return err;
2499         }
2500
2501         return 0;
2502 }
2503
2504 static void __exit sm_it87_exit(void)
2505 {
2506         platform_device_unregister(pdev);
2507         platform_driver_unregister(&it87_driver);
2508 }
2509
2510
2511 MODULE_AUTHOR("Chris Gauthron, "
2512               "Jean Delvare <khali@linux-fr.org>");
2513 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2514 module_param(update_vbat, bool, 0);
2515 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2516 module_param(fix_pwm_polarity, bool, 0);
2517 MODULE_PARM_DESC(fix_pwm_polarity,
2518                  "Force PWM polarity to active high (DANGEROUS)");
2519 MODULE_LICENSE("GPL");
2520
2521 module_init(sm_it87_init);
2522 module_exit(sm_it87_exit);