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Linux/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: IT8603E  Super I/O chip w/LPC interface
 14  *            IT8620E  Super I/O chip w/LPC interface
 15  *            IT8623E  Super I/O chip w/LPC interface
 16  *            IT8705F  Super I/O chip w/LPC interface
 17  *            IT8712F  Super I/O chip w/LPC interface
 18  *            IT8716F  Super I/O chip w/LPC interface
 19  *            IT8718F  Super I/O chip w/LPC interface
 20  *            IT8720F  Super I/O chip w/LPC interface
 21  *            IT8721F  Super I/O chip w/LPC interface
 22  *            IT8726F  Super I/O chip w/LPC interface
 23  *            IT8728F  Super I/O chip w/LPC interface
 24  *            IT8732F  Super I/O chip w/LPC interface
 25  *            IT8758E  Super I/O chip w/LPC interface
 26  *            IT8771E  Super I/O chip w/LPC interface
 27  *            IT8772E  Super I/O chip w/LPC interface
 28  *            IT8781F  Super I/O chip w/LPC interface
 29  *            IT8782F  Super I/O chip w/LPC interface
 30  *            IT8783E/F Super I/O chip w/LPC interface
 31  *            IT8786E  Super I/O chip w/LPC interface
 32  *            IT8790E  Super I/O chip w/LPC interface
 33  *            Sis950   A clone of the IT8705F
 34  *
 35  *  Copyright (C) 2001 Chris Gauthron
 36  *  Copyright (C) 2005-2010 Jean Delvare <jdelvare@suse.de>
 37  *
 38  *  This program is free software; you can redistribute it and/or modify
 39  *  it under the terms of the GNU General Public License as published by
 40  *  the Free Software Foundation; either version 2 of the License, or
 41  *  (at your option) any later version.
 42  *
 43  *  This program is distributed in the hope that it will be useful,
 44  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 45  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 46  *  GNU General Public License for more details.
 47  *
 48  *  You should have received a copy of the GNU General Public License
 49  *  along with this program; if not, write to the Free Software
 50  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 51  */
 52 
 53 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 54 
 55 #include <linux/module.h>
 56 #include <linux/init.h>
 57 #include <linux/slab.h>
 58 #include <linux/jiffies.h>
 59 #include <linux/platform_device.h>
 60 #include <linux/hwmon.h>
 61 #include <linux/hwmon-sysfs.h>
 62 #include <linux/hwmon-vid.h>
 63 #include <linux/err.h>
 64 #include <linux/mutex.h>
 65 #include <linux/sysfs.h>
 66 #include <linux/string.h>
 67 #include <linux/dmi.h>
 68 #include <linux/acpi.h>
 69 #include <linux/io.h>
 70 
 71 #define DRVNAME "it87"
 72 
 73 enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8732,
 74              it8771, it8772, it8781, it8782, it8783, it8786, it8790, it8603,
 75              it8620 };
 76 
 77 static unsigned short force_id;
 78 module_param(force_id, ushort, 0);
 79 MODULE_PARM_DESC(force_id, "Override the detected device ID");
 80 
 81 static struct platform_device *pdev;
 82 
 83 #define REG     0x2e    /* The register to read/write */
 84 #define DEV     0x07    /* Register: Logical device select */
 85 #define VAL     0x2f    /* The value to read/write */
 86 #define PME     0x04    /* The device with the fan registers in it */
 87 
 88 /* The device with the IT8718F/IT8720F VID value in it */
 89 #define GPIO    0x07
 90 
 91 #define DEVID   0x20    /* Register: Device ID */
 92 #define DEVREV  0x22    /* Register: Device Revision */
 93 
 94 static inline int superio_inb(int reg)
 95 {
 96         outb(reg, REG);
 97         return inb(VAL);
 98 }
 99 
100 static inline void superio_outb(int reg, int val)
101 {
102         outb(reg, REG);
103         outb(val, VAL);
104 }
105 
106 static int superio_inw(int reg)
107 {
108         int val;
109         outb(reg++, REG);
110         val = inb(VAL) << 8;
111         outb(reg, REG);
112         val |= inb(VAL);
113         return val;
114 }
115 
116 static inline void superio_select(int ldn)
117 {
118         outb(DEV, REG);
119         outb(ldn, VAL);
120 }
121 
122 static inline int superio_enter(void)
123 {
124         /*
125          * Try to reserve REG and REG + 1 for exclusive access.
126          */
127         if (!request_muxed_region(REG, 2, DRVNAME))
128                 return -EBUSY;
129 
130         outb(0x87, REG);
131         outb(0x01, REG);
132         outb(0x55, REG);
133         outb(0x55, REG);
134         return 0;
135 }
136 
137 static inline void superio_exit(void)
138 {
139         outb(0x02, REG);
140         outb(0x02, VAL);
141         release_region(REG, 2);
142 }
143 
144 /* Logical device 4 registers */
145 #define IT8712F_DEVID 0x8712
146 #define IT8705F_DEVID 0x8705
147 #define IT8716F_DEVID 0x8716
148 #define IT8718F_DEVID 0x8718
149 #define IT8720F_DEVID 0x8720
150 #define IT8721F_DEVID 0x8721
151 #define IT8726F_DEVID 0x8726
152 #define IT8728F_DEVID 0x8728
153 #define IT8732F_DEVID 0x8732
154 #define IT8771E_DEVID 0x8771
155 #define IT8772E_DEVID 0x8772
156 #define IT8781F_DEVID 0x8781
157 #define IT8782F_DEVID 0x8782
158 #define IT8783E_DEVID 0x8783
159 #define IT8786E_DEVID 0x8786
160 #define IT8790E_DEVID 0x8790
161 #define IT8603E_DEVID 0x8603
162 #define IT8620E_DEVID 0x8620
163 #define IT8623E_DEVID 0x8623
164 #define IT87_ACT_REG  0x30
165 #define IT87_BASE_REG 0x60
166 
167 /* Logical device 7 registers (IT8712F and later) */
168 #define IT87_SIO_GPIO1_REG      0x25
169 #define IT87_SIO_GPIO2_REG      0x26
170 #define IT87_SIO_GPIO3_REG      0x27
171 #define IT87_SIO_GPIO5_REG      0x29
172 #define IT87_SIO_PINX1_REG      0x2a    /* Pin selection */
173 #define IT87_SIO_PINX2_REG      0x2c    /* Pin selection */
174 #define IT87_SIO_SPI_REG        0xef    /* SPI function pin select */
175 #define IT87_SIO_VID_REG        0xfc    /* VID value */
176 #define IT87_SIO_BEEP_PIN_REG   0xf6    /* Beep pin mapping */
177 
178 /* Update battery voltage after every reading if true */
179 static bool update_vbat;
180 
181 /* Not all BIOSes properly configure the PWM registers */
182 static bool fix_pwm_polarity;
183 
184 /* Many IT87 constants specified below */
185 
186 /* Length of ISA address segment */
187 #define IT87_EXTENT 8
188 
189 /* Length of ISA address segment for Environmental Controller */
190 #define IT87_EC_EXTENT 2
191 
192 /* Offset of EC registers from ISA base address */
193 #define IT87_EC_OFFSET 5
194 
195 /* Where are the ISA address/data registers relative to the EC base address */
196 #define IT87_ADDR_REG_OFFSET 0
197 #define IT87_DATA_REG_OFFSET 1
198 
199 /*----- The IT87 registers -----*/
200 
201 #define IT87_REG_CONFIG        0x00
202 
203 #define IT87_REG_ALARM1        0x01
204 #define IT87_REG_ALARM2        0x02
205 #define IT87_REG_ALARM3        0x03
206 
207 /*
208  * The IT8718F and IT8720F have the VID value in a different register, in
209  * Super-I/O configuration space.
210  */
211 #define IT87_REG_VID           0x0a
212 /*
213  * The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
214  * for fan divisors. Later IT8712F revisions must use 16-bit tachometer
215  * mode.
216  */
217 #define IT87_REG_FAN_DIV       0x0b
218 #define IT87_REG_FAN_16BIT     0x0c
219 
220 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
221 
222 static const u8 IT87_REG_FAN[]         = { 0x0d, 0x0e, 0x0f, 0x80, 0x82, 0x4c };
223 static const u8 IT87_REG_FAN_MIN[]     = { 0x10, 0x11, 0x12, 0x84, 0x86, 0x4e };
224 static const u8 IT87_REG_FANX[]        = { 0x18, 0x19, 0x1a, 0x81, 0x83, 0x4d };
225 static const u8 IT87_REG_FANX_MIN[]    = { 0x1b, 0x1c, 0x1d, 0x85, 0x87, 0x4f };
226 static const u8 IT87_REG_TEMP_OFFSET[] = { 0x56, 0x57, 0x59 };
227 
228 #define IT87_REG_FAN_MAIN_CTRL 0x13
229 #define IT87_REG_FAN_CTL       0x14
230 #define IT87_REG_PWM(nr)       (0x15 + (nr))
231 #define IT87_REG_PWM_DUTY(nr)  (0x63 + (nr) * 8)
232 
233 #define IT87_REG_VIN(nr)       (0x20 + (nr))
234 #define IT87_REG_TEMP(nr)      (0x29 + (nr))
235 
236 #define IT87_REG_VIN_MAX(nr)   (0x30 + (nr) * 2)
237 #define IT87_REG_VIN_MIN(nr)   (0x31 + (nr) * 2)
238 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
239 #define IT87_REG_TEMP_LOW(nr)  (0x41 + (nr) * 2)
240 
241 #define IT87_REG_VIN_ENABLE    0x50
242 #define IT87_REG_TEMP_ENABLE   0x51
243 #define IT87_REG_TEMP_EXTRA    0x55
244 #define IT87_REG_BEEP_ENABLE   0x5c
245 
246 #define IT87_REG_CHIPID        0x58
247 
248 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
249 #define IT87_REG_AUTO_PWM(nr, i)  (0x65 + (nr) * 8 + (i))
250 
251 struct it87_devices {
252         const char *name;
253         const char * const suffix;
254         u16 features;
255         u8 peci_mask;
256         u8 old_peci_mask;
257 };
258 
259 #define FEAT_12MV_ADC           (1 << 0)
260 #define FEAT_NEWER_AUTOPWM      (1 << 1)
261 #define FEAT_OLD_AUTOPWM        (1 << 2)
262 #define FEAT_16BIT_FANS         (1 << 3)
263 #define FEAT_TEMP_OFFSET        (1 << 4)
264 #define FEAT_TEMP_PECI          (1 << 5)
265 #define FEAT_TEMP_OLD_PECI      (1 << 6)
266 #define FEAT_FAN16_CONFIG       (1 << 7)        /* Need to enable 16-bit fans */
267 #define FEAT_FIVE_FANS          (1 << 8)        /* Supports five fans */
268 #define FEAT_VID                (1 << 9)        /* Set if chip supports VID */
269 #define FEAT_IN7_INTERNAL       (1 << 10)       /* Set if in7 is internal */
270 #define FEAT_SIX_FANS           (1 << 11)       /* Supports six fans */
271 #define FEAT_10_9MV_ADC         (1 << 12)
272 
273 static const struct it87_devices it87_devices[] = {
274         [it87] = {
275                 .name = "it87",
276                 .suffix = "F",
277                 .features = FEAT_OLD_AUTOPWM,   /* may need to overwrite */
278         },
279         [it8712] = {
280                 .name = "it8712",
281                 .suffix = "F",
282                 .features = FEAT_OLD_AUTOPWM | FEAT_VID,
283                                                 /* may need to overwrite */
284         },
285         [it8716] = {
286                 .name = "it8716",
287                 .suffix = "F",
288                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
289                   | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
290         },
291         [it8718] = {
292                 .name = "it8718",
293                 .suffix = "F",
294                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
295                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
296                 .old_peci_mask = 0x4,
297         },
298         [it8720] = {
299                 .name = "it8720",
300                 .suffix = "F",
301                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
302                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
303                 .old_peci_mask = 0x4,
304         },
305         [it8721] = {
306                 .name = "it8721",
307                 .suffix = "F",
308                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
309                   | FEAT_TEMP_OFFSET | FEAT_TEMP_OLD_PECI | FEAT_TEMP_PECI
310                   | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS | FEAT_IN7_INTERNAL,
311                 .peci_mask = 0x05,
312                 .old_peci_mask = 0x02,  /* Actually reports PCH */
313         },
314         [it8728] = {
315                 .name = "it8728",
316                 .suffix = "F",
317                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
318                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_FIVE_FANS
319                   | FEAT_IN7_INTERNAL,
320                 .peci_mask = 0x07,
321         },
322         [it8732] = {
323                 .name = "it8732",
324                 .suffix = "F",
325                 .features = FEAT_NEWER_AUTOPWM | FEAT_16BIT_FANS
326                   | FEAT_TEMP_OFFSET | FEAT_TEMP_OLD_PECI | FEAT_TEMP_PECI
327                   | FEAT_10_9MV_ADC | FEAT_IN7_INTERNAL,
328                 .peci_mask = 0x07,
329                 .old_peci_mask = 0x02,  /* Actually reports PCH */
330         },
331         [it8771] = {
332                 .name = "it8771",
333                 .suffix = "E",
334                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
335                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
336                                 /* PECI: guesswork */
337                                 /* 12mV ADC (OHM) */
338                                 /* 16 bit fans (OHM) */
339                                 /* three fans, always 16 bit (guesswork) */
340                 .peci_mask = 0x07,
341         },
342         [it8772] = {
343                 .name = "it8772",
344                 .suffix = "E",
345                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
346                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
347                                 /* PECI (coreboot) */
348                                 /* 12mV ADC (HWSensors4, OHM) */
349                                 /* 16 bit fans (HWSensors4, OHM) */
350                                 /* three fans, always 16 bit (datasheet) */
351                 .peci_mask = 0x07,
352         },
353         [it8781] = {
354                 .name = "it8781",
355                 .suffix = "F",
356                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
357                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
358                 .old_peci_mask = 0x4,
359         },
360         [it8782] = {
361                 .name = "it8782",
362                 .suffix = "F",
363                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
364                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
365                 .old_peci_mask = 0x4,
366         },
367         [it8783] = {
368                 .name = "it8783",
369                 .suffix = "E/F",
370                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
371                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
372                 .old_peci_mask = 0x4,
373         },
374         [it8786] = {
375                 .name = "it8786",
376                 .suffix = "E",
377                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
378                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
379                 .peci_mask = 0x07,
380         },
381         [it8790] = {
382                 .name = "it8790",
383                 .suffix = "E",
384                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
385                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
386                 .peci_mask = 0x07,
387         },
388         [it8603] = {
389                 .name = "it8603",
390                 .suffix = "E",
391                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
392                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
393                 .peci_mask = 0x07,
394         },
395         [it8620] = {
396                 .name = "it8620",
397                 .suffix = "E",
398                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
399                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_SIX_FANS
400                   | FEAT_IN7_INTERNAL,
401                 .peci_mask = 0x07,
402         },
403 };
404 
405 #define has_16bit_fans(data)    ((data)->features & FEAT_16BIT_FANS)
406 #define has_12mv_adc(data)      ((data)->features & FEAT_12MV_ADC)
407 #define has_10_9mv_adc(data)    ((data)->features & FEAT_10_9MV_ADC)
408 #define has_newer_autopwm(data) ((data)->features & FEAT_NEWER_AUTOPWM)
409 #define has_old_autopwm(data)   ((data)->features & FEAT_OLD_AUTOPWM)
410 #define has_temp_offset(data)   ((data)->features & FEAT_TEMP_OFFSET)
411 #define has_temp_peci(data, nr) (((data)->features & FEAT_TEMP_PECI) && \
412                                  ((data)->peci_mask & (1 << nr)))
413 #define has_temp_old_peci(data, nr) \
414                                 (((data)->features & FEAT_TEMP_OLD_PECI) && \
415                                  ((data)->old_peci_mask & (1 << nr)))
416 #define has_fan16_config(data)  ((data)->features & FEAT_FAN16_CONFIG)
417 #define has_five_fans(data)     ((data)->features & (FEAT_FIVE_FANS | \
418                                                      FEAT_SIX_FANS))
419 #define has_vid(data)           ((data)->features & FEAT_VID)
420 #define has_in7_internal(data)  ((data)->features & FEAT_IN7_INTERNAL)
421 #define has_six_fans(data)      ((data)->features & FEAT_SIX_FANS)
422 
423 struct it87_sio_data {
424         enum chips type;
425         /* Values read from Super-I/O config space */
426         u8 revision;
427         u8 vid_value;
428         u8 beep_pin;
429         u8 internal;    /* Internal sensors can be labeled */
430         /* Features skipped based on config or DMI */
431         u16 skip_in;
432         u8 skip_vid;
433         u8 skip_fan;
434         u8 skip_pwm;
435         u8 skip_temp;
436 };
437 
438 /*
439  * For each registered chip, we need to keep some data in memory.
440  * The structure is dynamically allocated.
441  */
442 struct it87_data {
443         struct device *hwmon_dev;
444         enum chips type;
445         u16 features;
446         u8 peci_mask;
447         u8 old_peci_mask;
448 
449         unsigned short addr;
450         const char *name;
451         struct mutex update_lock;
452         char valid;             /* !=0 if following fields are valid */
453         unsigned long last_updated;     /* In jiffies */
454 
455         u16 in_scaled;          /* Internal voltage sensors are scaled */
456         u8 in[10][3];           /* [nr][0]=in, [1]=min, [2]=max */
457         u8 has_fan;             /* Bitfield, fans enabled */
458         u16 fan[6][2];          /* Register values, [nr][0]=fan, [1]=min */
459         u8 has_temp;            /* Bitfield, temp sensors enabled */
460         s8 temp[3][4];          /* [nr][0]=temp, [1]=min, [2]=max, [3]=offset */
461         u8 sensor;              /* Register value (IT87_REG_TEMP_ENABLE) */
462         u8 extra;               /* Register value (IT87_REG_TEMP_EXTRA) */
463         u8 fan_div[3];          /* Register encoding, shifted right */
464         u8 vid;                 /* Register encoding, combined */
465         u8 vrm;
466         u32 alarms;             /* Register encoding, combined */
467         u8 beeps;               /* Register encoding */
468         u8 fan_main_ctrl;       /* Register value */
469         u8 fan_ctl;             /* Register value */
470 
471         /*
472          * The following 3 arrays correspond to the same registers up to
473          * the IT8720F. The meaning of bits 6-0 depends on the value of bit
474          * 7, and we want to preserve settings on mode changes, so we have
475          * to track all values separately.
476          * Starting with the IT8721F, the manual PWM duty cycles are stored
477          * in separate registers (8-bit values), so the separate tracking
478          * is no longer needed, but it is still done to keep the driver
479          * simple.
480          */
481         u8 pwm_ctrl[3];         /* Register value */
482         u8 pwm_duty[3];         /* Manual PWM value set by user */
483         u8 pwm_temp_map[3];     /* PWM to temp. chan. mapping (bits 1-0) */
484 
485         /* Automatic fan speed control registers */
486         u8 auto_pwm[3][4];      /* [nr][3] is hard-coded */
487         s8 auto_temp[3][5];     /* [nr][0] is point1_temp_hyst */
488 };
489 
490 static int adc_lsb(const struct it87_data *data, int nr)
491 {
492         int lsb;
493 
494         if (has_12mv_adc(data))
495                 lsb = 120;
496         else if (has_10_9mv_adc(data))
497                 lsb = 109;
498         else
499                 lsb = 160;
500         if (data->in_scaled & (1 << nr))
501                 lsb <<= 1;
502         return lsb;
503 }
504 
505 static u8 in_to_reg(const struct it87_data *data, int nr, long val)
506 {
507         val = DIV_ROUND_CLOSEST(val * 10, adc_lsb(data, nr));
508         return clamp_val(val, 0, 255);
509 }
510 
511 static int in_from_reg(const struct it87_data *data, int nr, int val)
512 {
513         return DIV_ROUND_CLOSEST(val * adc_lsb(data, nr), 10);
514 }
515 
516 static inline u8 FAN_TO_REG(long rpm, int div)
517 {
518         if (rpm == 0)
519                 return 255;
520         rpm = clamp_val(rpm, 1, 1000000);
521         return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
522 }
523 
524 static inline u16 FAN16_TO_REG(long rpm)
525 {
526         if (rpm == 0)
527                 return 0xffff;
528         return clamp_val((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
529 }
530 
531 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
532                                 1350000 / ((val) * (div)))
533 /* The divider is fixed to 2 in 16-bit mode */
534 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
535                              1350000 / ((val) * 2))
536 
537 #define TEMP_TO_REG(val) (clamp_val(((val) < 0 ? (((val) - 500) / 1000) : \
538                                     ((val) + 500) / 1000), -128, 127))
539 #define TEMP_FROM_REG(val) ((val) * 1000)
540 
541 static u8 pwm_to_reg(const struct it87_data *data, long val)
542 {
543         if (has_newer_autopwm(data))
544                 return val;
545         else
546                 return val >> 1;
547 }
548 
549 static int pwm_from_reg(const struct it87_data *data, u8 reg)
550 {
551         if (has_newer_autopwm(data))
552                 return reg;
553         else
554                 return (reg & 0x7f) << 1;
555 }
556 
557 
558 static int DIV_TO_REG(int val)
559 {
560         int answer = 0;
561         while (answer < 7 && (val >>= 1))
562                 answer++;
563         return answer;
564 }
565 #define DIV_FROM_REG(val) (1 << (val))
566 
567 /*
568  * PWM base frequencies. The frequency has to be divided by either 128 or 256,
569  * depending on the chip type, to calculate the actual PWM frequency.
570  *
571  * Some of the chip datasheets suggest a base frequency of 51 kHz instead
572  * of 750 kHz for the slowest base frequency, resulting in a PWM frequency
573  * of 200 Hz. Sometimes both PWM frequency select registers are affected,
574  * sometimes just one. It is unknown if this is a datasheet error or real,
575  * so this is ignored for now.
576  */
577 static const unsigned int pwm_freq[8] = {
578         48000000,
579         24000000,
580         12000000,
581         8000000,
582         6000000,
583         3000000,
584         1500000,
585         750000,
586 };
587 
588 static int it87_probe(struct platform_device *pdev);
589 static int it87_remove(struct platform_device *pdev);
590 
591 static int it87_read_value(struct it87_data *data, u8 reg);
592 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
593 static struct it87_data *it87_update_device(struct device *dev);
594 static int it87_check_pwm(struct device *dev);
595 static void it87_init_device(struct platform_device *pdev);
596 
597 
598 static struct platform_driver it87_driver = {
599         .driver = {
600                 .name   = DRVNAME,
601         },
602         .probe  = it87_probe,
603         .remove = it87_remove,
604 };
605 
606 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
607                        char *buf)
608 {
609         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
610         int nr = sattr->nr;
611         int index = sattr->index;
612 
613         struct it87_data *data = it87_update_device(dev);
614         return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr][index]));
615 }
616 
617 static ssize_t set_in(struct device *dev, struct device_attribute *attr,
618                       const char *buf, size_t count)
619 {
620         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
621         int nr = sattr->nr;
622         int index = sattr->index;
623 
624         struct it87_data *data = dev_get_drvdata(dev);
625         unsigned long val;
626 
627         if (kstrtoul(buf, 10, &val) < 0)
628                 return -EINVAL;
629 
630         mutex_lock(&data->update_lock);
631         data->in[nr][index] = in_to_reg(data, nr, val);
632         it87_write_value(data,
633                          index == 1 ? IT87_REG_VIN_MIN(nr)
634                                     : IT87_REG_VIN_MAX(nr),
635                          data->in[nr][index]);
636         mutex_unlock(&data->update_lock);
637         return count;
638 }
639 
640 static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0);
641 static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, set_in,
642                             0, 1);
643 static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, set_in,
644                             0, 2);
645 
646 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0);
647 static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_in, set_in,
648                             1, 1);
649 static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_in, set_in,
650                             1, 2);
651 
652 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0);
653 static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, set_in,
654                             2, 1);
655 static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, set_in,
656                             2, 2);
657 
658 static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0);
659 static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, set_in,
660                             3, 1);
661 static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, set_in,
662                             3, 2);
663 
664 static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0);
665 static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, set_in,
666                             4, 1);
667 static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, set_in,
668                             4, 2);
669 
670 static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, 5, 0);
671 static SENSOR_DEVICE_ATTR_2(in5_min, S_IRUGO | S_IWUSR, show_in, set_in,
672                             5, 1);
673 static SENSOR_DEVICE_ATTR_2(in5_max, S_IRUGO | S_IWUSR, show_in, set_in,
674                             5, 2);
675 
676 static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, 6, 0);
677 static SENSOR_DEVICE_ATTR_2(in6_min, S_IRUGO | S_IWUSR, show_in, set_in,
678                             6, 1);
679 static SENSOR_DEVICE_ATTR_2(in6_max, S_IRUGO | S_IWUSR, show_in, set_in,
680                             6, 2);
681 
682 static SENSOR_DEVICE_ATTR_2(in7_input, S_IRUGO, show_in, NULL, 7, 0);
683 static SENSOR_DEVICE_ATTR_2(in7_min, S_IRUGO | S_IWUSR, show_in, set_in,
684                             7, 1);
685 static SENSOR_DEVICE_ATTR_2(in7_max, S_IRUGO | S_IWUSR, show_in, set_in,
686                             7, 2);
687 
688 static SENSOR_DEVICE_ATTR_2(in8_input, S_IRUGO, show_in, NULL, 8, 0);
689 static SENSOR_DEVICE_ATTR_2(in9_input, S_IRUGO, show_in, NULL, 9, 0);
690 
691 /* 3 temperatures */
692 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
693                          char *buf)
694 {
695         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
696         int nr = sattr->nr;
697         int index = sattr->index;
698         struct it87_data *data = it87_update_device(dev);
699 
700         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
701 }
702 
703 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
704                         const char *buf, size_t count)
705 {
706         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
707         int nr = sattr->nr;
708         int index = sattr->index;
709         struct it87_data *data = dev_get_drvdata(dev);
710         long val;
711         u8 reg, regval;
712 
713         if (kstrtol(buf, 10, &val) < 0)
714                 return -EINVAL;
715 
716         mutex_lock(&data->update_lock);
717 
718         switch (index) {
719         default:
720         case 1:
721                 reg = IT87_REG_TEMP_LOW(nr);
722                 break;
723         case 2:
724                 reg = IT87_REG_TEMP_HIGH(nr);
725                 break;
726         case 3:
727                 regval = it87_read_value(data, IT87_REG_BEEP_ENABLE);
728                 if (!(regval & 0x80)) {
729                         regval |= 0x80;
730                         it87_write_value(data, IT87_REG_BEEP_ENABLE, regval);
731                 }
732                 data->valid = 0;
733                 reg = IT87_REG_TEMP_OFFSET[nr];
734                 break;
735         }
736 
737         data->temp[nr][index] = TEMP_TO_REG(val);
738         it87_write_value(data, reg, data->temp[nr][index]);
739         mutex_unlock(&data->update_lock);
740         return count;
741 }
742 
743 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
744 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
745                             0, 1);
746 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
747                             0, 2);
748 static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
749                             set_temp, 0, 3);
750 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0);
751 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
752                             1, 1);
753 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
754                             1, 2);
755 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
756                             set_temp, 1, 3);
757 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 2, 0);
758 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
759                             2, 1);
760 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
761                             2, 2);
762 static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
763                             set_temp, 2, 3);
764 
765 static ssize_t show_temp_type(struct device *dev, struct device_attribute *attr,
766                               char *buf)
767 {
768         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
769         int nr = sensor_attr->index;
770         struct it87_data *data = it87_update_device(dev);
771         u8 reg = data->sensor;      /* In case value is updated while used */
772         u8 extra = data->extra;
773 
774         if ((has_temp_peci(data, nr) && (reg >> 6 == nr + 1))
775             || (has_temp_old_peci(data, nr) && (extra & 0x80)))
776                 return sprintf(buf, "6\n");  /* Intel PECI */
777         if (reg & (1 << nr))
778                 return sprintf(buf, "3\n");  /* thermal diode */
779         if (reg & (8 << nr))
780                 return sprintf(buf, "4\n");  /* thermistor */
781         return sprintf(buf, "\n");      /* disabled */
782 }
783 
784 static ssize_t set_temp_type(struct device *dev, struct device_attribute *attr,
785                              const char *buf, size_t count)
786 {
787         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
788         int nr = sensor_attr->index;
789 
790         struct it87_data *data = dev_get_drvdata(dev);
791         long val;
792         u8 reg, extra;
793 
794         if (kstrtol(buf, 10, &val) < 0)
795                 return -EINVAL;
796 
797         reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
798         reg &= ~(1 << nr);
799         reg &= ~(8 << nr);
800         if (has_temp_peci(data, nr) && (reg >> 6 == nr + 1 || val == 6))
801                 reg &= 0x3f;
802         extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
803         if (has_temp_old_peci(data, nr) && ((extra & 0x80) || val == 6))
804                 extra &= 0x7f;
805         if (val == 2) { /* backwards compatibility */
806                 dev_warn(dev,
807                          "Sensor type 2 is deprecated, please use 4 instead\n");
808                 val = 4;
809         }
810         /* 3 = thermal diode; 4 = thermistor; 6 = Intel PECI; 0 = disabled */
811         if (val == 3)
812                 reg |= 1 << nr;
813         else if (val == 4)
814                 reg |= 8 << nr;
815         else if (has_temp_peci(data, nr) && val == 6)
816                 reg |= (nr + 1) << 6;
817         else if (has_temp_old_peci(data, nr) && val == 6)
818                 extra |= 0x80;
819         else if (val != 0)
820                 return -EINVAL;
821 
822         mutex_lock(&data->update_lock);
823         data->sensor = reg;
824         data->extra = extra;
825         it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
826         if (has_temp_old_peci(data, nr))
827                 it87_write_value(data, IT87_REG_TEMP_EXTRA, data->extra);
828         data->valid = 0;        /* Force cache refresh */
829         mutex_unlock(&data->update_lock);
830         return count;
831 }
832 
833 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, show_temp_type,
834                           set_temp_type, 0);
835 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, show_temp_type,
836                           set_temp_type, 1);
837 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, show_temp_type,
838                           set_temp_type, 2);
839 
840 /* 3 Fans */
841 
842 static int pwm_mode(const struct it87_data *data, int nr)
843 {
844         int ctrl = data->fan_main_ctrl & (1 << nr);
845 
846         if (ctrl == 0 && data->type != it8603)          /* Full speed */
847                 return 0;
848         if (data->pwm_ctrl[nr] & 0x80)                  /* Automatic mode */
849                 return 2;
850         else                                            /* Manual mode */
851                 return 1;
852 }
853 
854 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
855                         char *buf)
856 {
857         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
858         int nr = sattr->nr;
859         int index = sattr->index;
860         int speed;
861         struct it87_data *data = it87_update_device(dev);
862 
863         speed = has_16bit_fans(data) ?
864                 FAN16_FROM_REG(data->fan[nr][index]) :
865                 FAN_FROM_REG(data->fan[nr][index],
866                              DIV_FROM_REG(data->fan_div[nr]));
867         return sprintf(buf, "%d\n", speed);
868 }
869 
870 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
871                 char *buf)
872 {
873         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
874         int nr = sensor_attr->index;
875 
876         struct it87_data *data = it87_update_device(dev);
877         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
878 }
879 static ssize_t show_pwm_enable(struct device *dev,
880                 struct device_attribute *attr, char *buf)
881 {
882         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
883         int nr = sensor_attr->index;
884 
885         struct it87_data *data = it87_update_device(dev);
886         return sprintf(buf, "%d\n", pwm_mode(data, nr));
887 }
888 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
889                 char *buf)
890 {
891         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
892         int nr = sensor_attr->index;
893 
894         struct it87_data *data = it87_update_device(dev);
895         return sprintf(buf, "%d\n",
896                        pwm_from_reg(data, data->pwm_duty[nr]));
897 }
898 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
899                 char *buf)
900 {
901         struct it87_data *data = it87_update_device(dev);
902         int index = (data->fan_ctl >> 4) & 0x07;
903         unsigned int freq;
904 
905         freq = pwm_freq[index] / (has_newer_autopwm(data) ? 256 : 128);
906 
907         return sprintf(buf, "%u\n", freq);
908 }
909 
910 static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
911                        const char *buf, size_t count)
912 {
913         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
914         int nr = sattr->nr;
915         int index = sattr->index;
916 
917         struct it87_data *data = dev_get_drvdata(dev);
918         long val;
919         u8 reg;
920 
921         if (kstrtol(buf, 10, &val) < 0)
922                 return -EINVAL;
923 
924         mutex_lock(&data->update_lock);
925 
926         if (has_16bit_fans(data)) {
927                 data->fan[nr][index] = FAN16_TO_REG(val);
928                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
929                                  data->fan[nr][index] & 0xff);
930                 it87_write_value(data, IT87_REG_FANX_MIN[nr],
931                                  data->fan[nr][index] >> 8);
932         } else {
933                 reg = it87_read_value(data, IT87_REG_FAN_DIV);
934                 switch (nr) {
935                 case 0:
936                         data->fan_div[nr] = reg & 0x07;
937                         break;
938                 case 1:
939                         data->fan_div[nr] = (reg >> 3) & 0x07;
940                         break;
941                 case 2:
942                         data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
943                         break;
944                 }
945                 data->fan[nr][index] =
946                   FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
947                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
948                                  data->fan[nr][index]);
949         }
950 
951         mutex_unlock(&data->update_lock);
952         return count;
953 }
954 
955 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
956                 const char *buf, size_t count)
957 {
958         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
959         int nr = sensor_attr->index;
960 
961         struct it87_data *data = dev_get_drvdata(dev);
962         unsigned long val;
963         int min;
964         u8 old;
965 
966         if (kstrtoul(buf, 10, &val) < 0)
967                 return -EINVAL;
968 
969         mutex_lock(&data->update_lock);
970         old = it87_read_value(data, IT87_REG_FAN_DIV);
971 
972         /* Save fan min limit */
973         min = FAN_FROM_REG(data->fan[nr][1], DIV_FROM_REG(data->fan_div[nr]));
974 
975         switch (nr) {
976         case 0:
977         case 1:
978                 data->fan_div[nr] = DIV_TO_REG(val);
979                 break;
980         case 2:
981                 if (val < 8)
982                         data->fan_div[nr] = 1;
983                 else
984                         data->fan_div[nr] = 3;
985         }
986         val = old & 0x80;
987         val |= (data->fan_div[0] & 0x07);
988         val |= (data->fan_div[1] & 0x07) << 3;
989         if (data->fan_div[2] == 3)
990                 val |= 0x1 << 6;
991         it87_write_value(data, IT87_REG_FAN_DIV, val);
992 
993         /* Restore fan min limit */
994         data->fan[nr][1] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
995         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan[nr][1]);
996 
997         mutex_unlock(&data->update_lock);
998         return count;
999 }
1000 
1001 /* Returns 0 if OK, -EINVAL otherwise */
1002 static int check_trip_points(struct device *dev, int nr)
1003 {
1004         const struct it87_data *data = dev_get_drvdata(dev);
1005         int i, err = 0;
1006 
1007         if (has_old_autopwm(data)) {
1008                 for (i = 0; i < 3; i++) {
1009                         if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
1010                                 err = -EINVAL;
1011                 }
1012                 for (i = 0; i < 2; i++) {
1013                         if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
1014                                 err = -EINVAL;
1015                 }
1016         }
1017 
1018         if (err) {
1019                 dev_err(dev,
1020                         "Inconsistent trip points, not switching to automatic mode\n");
1021                 dev_err(dev, "Adjust the trip points and try again\n");
1022         }
1023         return err;
1024 }
1025 
1026 static ssize_t set_pwm_enable(struct device *dev,
1027                 struct device_attribute *attr, const char *buf, size_t count)
1028 {
1029         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1030         int nr = sensor_attr->index;
1031 
1032         struct it87_data *data = dev_get_drvdata(dev);
1033         long val;
1034 
1035         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 2)
1036                 return -EINVAL;
1037 
1038         /* Check trip points before switching to automatic mode */
1039         if (val == 2) {
1040                 if (check_trip_points(dev, nr) < 0)
1041                         return -EINVAL;
1042         }
1043 
1044         /* IT8603E does not have on/off mode */
1045         if (val == 0 && data->type == it8603)
1046                 return -EINVAL;
1047 
1048         mutex_lock(&data->update_lock);
1049 
1050         if (val == 0) {
1051                 int tmp;
1052                 /* make sure the fan is on when in on/off mode */
1053                 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1054                 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
1055                 /* set on/off mode */
1056                 data->fan_main_ctrl &= ~(1 << nr);
1057                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1058                                  data->fan_main_ctrl);
1059         } else {
1060                 if (val == 1)                           /* Manual mode */
1061                         data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
1062                                              data->pwm_temp_map[nr] :
1063                                              data->pwm_duty[nr];
1064                 else                                    /* Automatic mode */
1065                         data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1066                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1067 
1068                 if (data->type != it8603) {
1069                         /* set SmartGuardian mode */
1070                         data->fan_main_ctrl |= (1 << nr);
1071                         it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1072                                          data->fan_main_ctrl);
1073                 }
1074         }
1075 
1076         mutex_unlock(&data->update_lock);
1077         return count;
1078 }
1079 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
1080                 const char *buf, size_t count)
1081 {
1082         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1083         int nr = sensor_attr->index;
1084 
1085         struct it87_data *data = dev_get_drvdata(dev);
1086         long val;
1087 
1088         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1089                 return -EINVAL;
1090 
1091         mutex_lock(&data->update_lock);
1092         if (has_newer_autopwm(data)) {
1093                 /*
1094                  * If we are in automatic mode, the PWM duty cycle register
1095                  * is read-only so we can't write the value.
1096                  */
1097                 if (data->pwm_ctrl[nr] & 0x80) {
1098                         mutex_unlock(&data->update_lock);
1099                         return -EBUSY;
1100                 }
1101                 data->pwm_duty[nr] = pwm_to_reg(data, val);
1102                 it87_write_value(data, IT87_REG_PWM_DUTY(nr),
1103                                  data->pwm_duty[nr]);
1104         } else {
1105                 data->pwm_duty[nr] = pwm_to_reg(data, val);
1106                 /*
1107                  * If we are in manual mode, write the duty cycle immediately;
1108                  * otherwise, just store it for later use.
1109                  */
1110                 if (!(data->pwm_ctrl[nr] & 0x80)) {
1111                         data->pwm_ctrl[nr] = data->pwm_duty[nr];
1112                         it87_write_value(data, IT87_REG_PWM(nr),
1113                                          data->pwm_ctrl[nr]);
1114                 }
1115         }
1116         mutex_unlock(&data->update_lock);
1117         return count;
1118 }
1119 static ssize_t set_pwm_freq(struct device *dev,
1120                 struct device_attribute *attr, const char *buf, size_t count)
1121 {
1122         struct it87_data *data = dev_get_drvdata(dev);
1123         unsigned long val;
1124         int i;
1125 
1126         if (kstrtoul(buf, 10, &val) < 0)
1127                 return -EINVAL;
1128 
1129         val = clamp_val(val, 0, 1000000);
1130         val *= has_newer_autopwm(data) ? 256 : 128;
1131 
1132         /* Search for the nearest available frequency */
1133         for (i = 0; i < 7; i++) {
1134                 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
1135                         break;
1136         }
1137 
1138         mutex_lock(&data->update_lock);
1139         data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
1140         data->fan_ctl |= i << 4;
1141         it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
1142         mutex_unlock(&data->update_lock);
1143 
1144         return count;
1145 }
1146 static ssize_t show_pwm_temp_map(struct device *dev,
1147                 struct device_attribute *attr, char *buf)
1148 {
1149         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1150         int nr = sensor_attr->index;
1151 
1152         struct it87_data *data = it87_update_device(dev);
1153         int map;
1154 
1155         if (data->pwm_temp_map[nr] < 3)
1156                 map = 1 << data->pwm_temp_map[nr];
1157         else
1158                 map = 0;                        /* Should never happen */
1159         return sprintf(buf, "%d\n", map);
1160 }
1161 static ssize_t set_pwm_temp_map(struct device *dev,
1162                 struct device_attribute *attr, const char *buf, size_t count)
1163 {
1164         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1165         int nr = sensor_attr->index;
1166 
1167         struct it87_data *data = dev_get_drvdata(dev);
1168         long val;
1169         u8 reg;
1170 
1171         /*
1172          * This check can go away if we ever support automatic fan speed
1173          * control on newer chips.
1174          */
1175         if (!has_old_autopwm(data)) {
1176                 dev_notice(dev, "Mapping change disabled for safety reasons\n");
1177                 return -EINVAL;
1178         }
1179 
1180         if (kstrtol(buf, 10, &val) < 0)
1181                 return -EINVAL;
1182 
1183         switch (val) {
1184         case (1 << 0):
1185                 reg = 0x00;
1186                 break;
1187         case (1 << 1):
1188                 reg = 0x01;
1189                 break;
1190         case (1 << 2):
1191                 reg = 0x02;
1192                 break;
1193         default:
1194                 return -EINVAL;
1195         }
1196 
1197         mutex_lock(&data->update_lock);
1198         data->pwm_temp_map[nr] = reg;
1199         /*
1200          * If we are in automatic mode, write the temp mapping immediately;
1201          * otherwise, just store it for later use.
1202          */
1203         if (data->pwm_ctrl[nr] & 0x80) {
1204                 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1205                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1206         }
1207         mutex_unlock(&data->update_lock);
1208         return count;
1209 }
1210 
1211 static ssize_t show_auto_pwm(struct device *dev,
1212                 struct device_attribute *attr, char *buf)
1213 {
1214         struct it87_data *data = it87_update_device(dev);
1215         struct sensor_device_attribute_2 *sensor_attr =
1216                         to_sensor_dev_attr_2(attr);
1217         int nr = sensor_attr->nr;
1218         int point = sensor_attr->index;
1219 
1220         return sprintf(buf, "%d\n",
1221                        pwm_from_reg(data, data->auto_pwm[nr][point]));
1222 }
1223 
1224 static ssize_t set_auto_pwm(struct device *dev,
1225                 struct device_attribute *attr, const char *buf, size_t count)
1226 {
1227         struct it87_data *data = dev_get_drvdata(dev);
1228         struct sensor_device_attribute_2 *sensor_attr =
1229                         to_sensor_dev_attr_2(attr);
1230         int nr = sensor_attr->nr;
1231         int point = sensor_attr->index;
1232         long val;
1233 
1234         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1235                 return -EINVAL;
1236 
1237         mutex_lock(&data->update_lock);
1238         data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1239         it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1240                          data->auto_pwm[nr][point]);
1241         mutex_unlock(&data->update_lock);
1242         return count;
1243 }
1244 
1245 static ssize_t show_auto_temp(struct device *dev,
1246                 struct device_attribute *attr, char *buf)
1247 {
1248         struct it87_data *data = it87_update_device(dev);
1249         struct sensor_device_attribute_2 *sensor_attr =
1250                         to_sensor_dev_attr_2(attr);
1251         int nr = sensor_attr->nr;
1252         int point = sensor_attr->index;
1253 
1254         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1255 }
1256 
1257 static ssize_t set_auto_temp(struct device *dev,
1258                 struct device_attribute *attr, const char *buf, size_t count)
1259 {
1260         struct it87_data *data = dev_get_drvdata(dev);
1261         struct sensor_device_attribute_2 *sensor_attr =
1262                         to_sensor_dev_attr_2(attr);
1263         int nr = sensor_attr->nr;
1264         int point = sensor_attr->index;
1265         long val;
1266 
1267         if (kstrtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1268                 return -EINVAL;
1269 
1270         mutex_lock(&data->update_lock);
1271         data->auto_temp[nr][point] = TEMP_TO_REG(val);
1272         it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1273                          data->auto_temp[nr][point]);
1274         mutex_unlock(&data->update_lock);
1275         return count;
1276 }
1277 
1278 static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_fan, NULL, 0, 0);
1279 static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1280                             0, 1);
1281 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, show_fan_div,
1282                           set_fan_div, 0);
1283 
1284 static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_fan, NULL, 1, 0);
1285 static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1286                             1, 1);
1287 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, show_fan_div,
1288                           set_fan_div, 1);
1289 
1290 static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_fan, NULL, 2, 0);
1291 static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1292                             2, 1);
1293 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR, show_fan_div,
1294                           set_fan_div, 2);
1295 
1296 static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_fan, NULL, 3, 0);
1297 static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1298                             3, 1);
1299 
1300 static SENSOR_DEVICE_ATTR_2(fan5_input, S_IRUGO, show_fan, NULL, 4, 0);
1301 static SENSOR_DEVICE_ATTR_2(fan5_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1302                             4, 1);
1303 
1304 static SENSOR_DEVICE_ATTR_2(fan6_input, S_IRUGO, show_fan, NULL, 5, 0);
1305 static SENSOR_DEVICE_ATTR_2(fan6_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1306                             5, 1);
1307 
1308 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
1309                           show_pwm_enable, set_pwm_enable, 0);
1310 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 0);
1311 static DEVICE_ATTR(pwm1_freq, S_IRUGO | S_IWUSR, show_pwm_freq, set_pwm_freq);
1312 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IRUGO | S_IWUSR,
1313                           show_pwm_temp_map, set_pwm_temp_map, 0);
1314 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR,
1315                             show_auto_pwm, set_auto_pwm, 0, 0);
1316 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR,
1317                             show_auto_pwm, set_auto_pwm, 0, 1);
1318 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_pwm, S_IRUGO | S_IWUSR,
1319                             show_auto_pwm, set_auto_pwm, 0, 2);
1320 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_pwm, S_IRUGO,
1321                             show_auto_pwm, NULL, 0, 3);
1322 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
1323                             show_auto_temp, set_auto_temp, 0, 1);
1324 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1325                             show_auto_temp, set_auto_temp, 0, 0);
1326 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
1327                             show_auto_temp, set_auto_temp, 0, 2);
1328 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
1329                             show_auto_temp, set_auto_temp, 0, 3);
1330 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_temp, S_IRUGO | S_IWUSR,
1331                             show_auto_temp, set_auto_temp, 0, 4);
1332 
1333 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR,
1334                           show_pwm_enable, set_pwm_enable, 1);
1335 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 1);
1336 static DEVICE_ATTR(pwm2_freq, S_IRUGO, show_pwm_freq, NULL);
1337 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IRUGO | S_IWUSR,
1338                           show_pwm_temp_map, set_pwm_temp_map, 1);
1339 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR,
1340                             show_auto_pwm, set_auto_pwm, 1, 0);
1341 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR,
1342                             show_auto_pwm, set_auto_pwm, 1, 1);
1343 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_pwm, S_IRUGO | S_IWUSR,
1344                             show_auto_pwm, set_auto_pwm, 1, 2);
1345 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_pwm, S_IRUGO,
1346                             show_auto_pwm, NULL, 1, 3);
1347 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
1348                             show_auto_temp, set_auto_temp, 1, 1);
1349 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1350                             show_auto_temp, set_auto_temp, 1, 0);
1351 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
1352                             show_auto_temp, set_auto_temp, 1, 2);
1353 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
1354                             show_auto_temp, set_auto_temp, 1, 3);
1355 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_temp, S_IRUGO | S_IWUSR,
1356                             show_auto_temp, set_auto_temp, 1, 4);
1357 
1358 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR,
1359                           show_pwm_enable, set_pwm_enable, 2);
1360 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 2);
1361 static DEVICE_ATTR(pwm3_freq, S_IRUGO, show_pwm_freq, NULL);
1362 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IRUGO | S_IWUSR,
1363                           show_pwm_temp_map, set_pwm_temp_map, 2);
1364 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR,
1365                             show_auto_pwm, set_auto_pwm, 2, 0);
1366 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR,
1367                             show_auto_pwm, set_auto_pwm, 2, 1);
1368 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_pwm, S_IRUGO | S_IWUSR,
1369                             show_auto_pwm, set_auto_pwm, 2, 2);
1370 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_pwm, S_IRUGO,
1371                             show_auto_pwm, NULL, 2, 3);
1372 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
1373                             show_auto_temp, set_auto_temp, 2, 1);
1374 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1375                             show_auto_temp, set_auto_temp, 2, 0);
1376 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
1377                             show_auto_temp, set_auto_temp, 2, 2);
1378 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
1379                             show_auto_temp, set_auto_temp, 2, 3);
1380 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_temp, S_IRUGO | S_IWUSR,
1381                             show_auto_temp, set_auto_temp, 2, 4);
1382 
1383 /* Alarms */
1384 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1385                 char *buf)
1386 {
1387         struct it87_data *data = it87_update_device(dev);
1388         return sprintf(buf, "%u\n", data->alarms);
1389 }
1390 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1391 
1392 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1393                 char *buf)
1394 {
1395         int bitnr = to_sensor_dev_attr(attr)->index;
1396         struct it87_data *data = it87_update_device(dev);
1397         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1398 }
1399 
1400 static ssize_t clear_intrusion(struct device *dev, struct device_attribute
1401                 *attr, const char *buf, size_t count)
1402 {
1403         struct it87_data *data = dev_get_drvdata(dev);
1404         long val;
1405         int config;
1406 
1407         if (kstrtol(buf, 10, &val) < 0 || val != 0)
1408                 return -EINVAL;
1409 
1410         mutex_lock(&data->update_lock);
1411         config = it87_read_value(data, IT87_REG_CONFIG);
1412         if (config < 0) {
1413                 count = config;
1414         } else {
1415                 config |= 1 << 5;
1416                 it87_write_value(data, IT87_REG_CONFIG, config);
1417                 /* Invalidate cache to force re-read */
1418                 data->valid = 0;
1419         }
1420         mutex_unlock(&data->update_lock);
1421 
1422         return count;
1423 }
1424 
1425 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1426 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1427 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1428 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1429 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1430 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1431 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1432 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1433 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1434 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1435 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1436 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1437 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1438 static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO, show_alarm, NULL, 7);
1439 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1440 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1441 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1442 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1443                           show_alarm, clear_intrusion, 4);
1444 
1445 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1446                 char *buf)
1447 {
1448         int bitnr = to_sensor_dev_attr(attr)->index;
1449         struct it87_data *data = it87_update_device(dev);
1450         return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1451 }
1452 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1453                 const char *buf, size_t count)
1454 {
1455         int bitnr = to_sensor_dev_attr(attr)->index;
1456         struct it87_data *data = dev_get_drvdata(dev);
1457         long val;
1458 
1459         if (kstrtol(buf, 10, &val) < 0
1460          || (val != 0 && val != 1))
1461                 return -EINVAL;
1462 
1463         mutex_lock(&data->update_lock);
1464         data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1465         if (val)
1466                 data->beeps |= (1 << bitnr);
1467         else
1468                 data->beeps &= ~(1 << bitnr);
1469         it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1470         mutex_unlock(&data->update_lock);
1471         return count;
1472 }
1473 
1474 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1475                           show_beep, set_beep, 1);
1476 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1477 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1478 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1479 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1480 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1481 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1482 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1483 /* fanX_beep writability is set later */
1484 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1485 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1486 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1487 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1488 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1489 static SENSOR_DEVICE_ATTR(fan6_beep, S_IRUGO, show_beep, set_beep, 0);
1490 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1491                           show_beep, set_beep, 2);
1492 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1493 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1494 
1495 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1496                 char *buf)
1497 {
1498         struct it87_data *data = dev_get_drvdata(dev);
1499         return sprintf(buf, "%u\n", data->vrm);
1500 }
1501 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1502                 const char *buf, size_t count)
1503 {
1504         struct it87_data *data = dev_get_drvdata(dev);
1505         unsigned long val;
1506 
1507         if (kstrtoul(buf, 10, &val) < 0)
1508                 return -EINVAL;
1509 
1510         data->vrm = val;
1511 
1512         return count;
1513 }
1514 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1515 
1516 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1517                 char *buf)
1518 {
1519         struct it87_data *data = it87_update_device(dev);
1520         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1521 }
1522 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1523 
1524 static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1525                 char *buf)
1526 {
1527         static const char * const labels[] = {
1528                 "+5V",
1529                 "5VSB",
1530                 "Vbat",
1531         };
1532         static const char * const labels_it8721[] = {
1533                 "+3.3V",
1534                 "3VSB",
1535                 "Vbat",
1536         };
1537         struct it87_data *data = dev_get_drvdata(dev);
1538         int nr = to_sensor_dev_attr(attr)->index;
1539         const char *label;
1540 
1541         if (has_12mv_adc(data) || has_10_9mv_adc(data))
1542                 label = labels_it8721[nr];
1543         else
1544                 label = labels[nr];
1545 
1546         return sprintf(buf, "%s\n", label);
1547 }
1548 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1549 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1550 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1551 /* special AVCC3 IT8603E in9 */
1552 static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL, 0);
1553 
1554 static ssize_t show_name(struct device *dev, struct device_attribute
1555                          *devattr, char *buf)
1556 {
1557         struct it87_data *data = dev_get_drvdata(dev);
1558         return sprintf(buf, "%s\n", data->name);
1559 }
1560 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1561 
1562 static struct attribute *it87_attributes_in[10][5] = {
1563 {
1564         &sensor_dev_attr_in0_input.dev_attr.attr,
1565         &sensor_dev_attr_in0_min.dev_attr.attr,
1566         &sensor_dev_attr_in0_max.dev_attr.attr,
1567         &sensor_dev_attr_in0_alarm.dev_attr.attr,
1568         NULL
1569 }, {
1570         &sensor_dev_attr_in1_input.dev_attr.attr,
1571         &sensor_dev_attr_in1_min.dev_attr.attr,
1572         &sensor_dev_attr_in1_max.dev_attr.attr,
1573         &sensor_dev_attr_in1_alarm.dev_attr.attr,
1574         NULL
1575 }, {
1576         &sensor_dev_attr_in2_input.dev_attr.attr,
1577         &sensor_dev_attr_in2_min.dev_attr.attr,
1578         &sensor_dev_attr_in2_max.dev_attr.attr,
1579         &sensor_dev_attr_in2_alarm.dev_attr.attr,
1580         NULL
1581 }, {
1582         &sensor_dev_attr_in3_input.dev_attr.attr,
1583         &sensor_dev_attr_in3_min.dev_attr.attr,
1584         &sensor_dev_attr_in3_max.dev_attr.attr,
1585         &sensor_dev_attr_in3_alarm.dev_attr.attr,
1586         NULL
1587 }, {
1588         &sensor_dev_attr_in4_input.dev_attr.attr,
1589         &sensor_dev_attr_in4_min.dev_attr.attr,
1590         &sensor_dev_attr_in4_max.dev_attr.attr,
1591         &sensor_dev_attr_in4_alarm.dev_attr.attr,
1592         NULL
1593 }, {
1594         &sensor_dev_attr_in5_input.dev_attr.attr,
1595         &sensor_dev_attr_in5_min.dev_attr.attr,
1596         &sensor_dev_attr_in5_max.dev_attr.attr,
1597         &sensor_dev_attr_in5_alarm.dev_attr.attr,
1598         NULL
1599 }, {
1600         &sensor_dev_attr_in6_input.dev_attr.attr,
1601         &sensor_dev_attr_in6_min.dev_attr.attr,
1602         &sensor_dev_attr_in6_max.dev_attr.attr,
1603         &sensor_dev_attr_in6_alarm.dev_attr.attr,
1604         NULL
1605 }, {
1606         &sensor_dev_attr_in7_input.dev_attr.attr,
1607         &sensor_dev_attr_in7_min.dev_attr.attr,
1608         &sensor_dev_attr_in7_max.dev_attr.attr,
1609         &sensor_dev_attr_in7_alarm.dev_attr.attr,
1610         NULL
1611 }, {
1612         &sensor_dev_attr_in8_input.dev_attr.attr,
1613         NULL
1614 }, {
1615         &sensor_dev_attr_in9_input.dev_attr.attr,
1616         NULL
1617 } };
1618 
1619 static const struct attribute_group it87_group_in[10] = {
1620         { .attrs = it87_attributes_in[0] },
1621         { .attrs = it87_attributes_in[1] },
1622         { .attrs = it87_attributes_in[2] },
1623         { .attrs = it87_attributes_in[3] },
1624         { .attrs = it87_attributes_in[4] },
1625         { .attrs = it87_attributes_in[5] },
1626         { .attrs = it87_attributes_in[6] },
1627         { .attrs = it87_attributes_in[7] },
1628         { .attrs = it87_attributes_in[8] },
1629         { .attrs = it87_attributes_in[9] },
1630 };
1631 
1632 static struct attribute *it87_attributes_temp[3][6] = {
1633 {
1634         &sensor_dev_attr_temp1_input.dev_attr.attr,
1635         &sensor_dev_attr_temp1_max.dev_attr.attr,
1636         &sensor_dev_attr_temp1_min.dev_attr.attr,
1637         &sensor_dev_attr_temp1_type.dev_attr.attr,
1638         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1639         NULL
1640 } , {
1641         &sensor_dev_attr_temp2_input.dev_attr.attr,
1642         &sensor_dev_attr_temp2_max.dev_attr.attr,
1643         &sensor_dev_attr_temp2_min.dev_attr.attr,
1644         &sensor_dev_attr_temp2_type.dev_attr.attr,
1645         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1646         NULL
1647 } , {
1648         &sensor_dev_attr_temp3_input.dev_attr.attr,
1649         &sensor_dev_attr_temp3_max.dev_attr.attr,
1650         &sensor_dev_attr_temp3_min.dev_attr.attr,
1651         &sensor_dev_attr_temp3_type.dev_attr.attr,
1652         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1653         NULL
1654 } };
1655 
1656 static const struct attribute_group it87_group_temp[3] = {
1657         { .attrs = it87_attributes_temp[0] },
1658         { .attrs = it87_attributes_temp[1] },
1659         { .attrs = it87_attributes_temp[2] },
1660 };
1661 
1662 static struct attribute *it87_attributes_temp_offset[] = {
1663         &sensor_dev_attr_temp1_offset.dev_attr.attr,
1664         &sensor_dev_attr_temp2_offset.dev_attr.attr,
1665         &sensor_dev_attr_temp3_offset.dev_attr.attr,
1666 };
1667 
1668 static struct attribute *it87_attributes[] = {
1669         &dev_attr_alarms.attr,
1670         &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
1671         &dev_attr_name.attr,
1672         NULL
1673 };
1674 
1675 static const struct attribute_group it87_group = {
1676         .attrs = it87_attributes,
1677 };
1678 
1679 static struct attribute *it87_attributes_in_beep[] = {
1680         &sensor_dev_attr_in0_beep.dev_attr.attr,
1681         &sensor_dev_attr_in1_beep.dev_attr.attr,
1682         &sensor_dev_attr_in2_beep.dev_attr.attr,
1683         &sensor_dev_attr_in3_beep.dev_attr.attr,
1684         &sensor_dev_attr_in4_beep.dev_attr.attr,
1685         &sensor_dev_attr_in5_beep.dev_attr.attr,
1686         &sensor_dev_attr_in6_beep.dev_attr.attr,
1687         &sensor_dev_attr_in7_beep.dev_attr.attr,
1688         NULL,
1689         NULL,
1690 };
1691 
1692 static struct attribute *it87_attributes_temp_beep[] = {
1693         &sensor_dev_attr_temp1_beep.dev_attr.attr,
1694         &sensor_dev_attr_temp2_beep.dev_attr.attr,
1695         &sensor_dev_attr_temp3_beep.dev_attr.attr,
1696 };
1697 
1698 static struct attribute *it87_attributes_fan[6][3+1] = { {
1699         &sensor_dev_attr_fan1_input.dev_attr.attr,
1700         &sensor_dev_attr_fan1_min.dev_attr.attr,
1701         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1702         NULL
1703 }, {
1704         &sensor_dev_attr_fan2_input.dev_attr.attr,
1705         &sensor_dev_attr_fan2_min.dev_attr.attr,
1706         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1707         NULL
1708 }, {
1709         &sensor_dev_attr_fan3_input.dev_attr.attr,
1710         &sensor_dev_attr_fan3_min.dev_attr.attr,
1711         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1712         NULL
1713 }, {
1714         &sensor_dev_attr_fan4_input.dev_attr.attr,
1715         &sensor_dev_attr_fan4_min.dev_attr.attr,
1716         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1717         NULL
1718 }, {
1719         &sensor_dev_attr_fan5_input.dev_attr.attr,
1720         &sensor_dev_attr_fan5_min.dev_attr.attr,
1721         &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1722         NULL
1723 }, {
1724         &sensor_dev_attr_fan6_input.dev_attr.attr,
1725         &sensor_dev_attr_fan6_min.dev_attr.attr,
1726         &sensor_dev_attr_fan6_alarm.dev_attr.attr,
1727         NULL
1728 } };
1729 
1730 static const struct attribute_group it87_group_fan[6] = {
1731         { .attrs = it87_attributes_fan[0] },
1732         { .attrs = it87_attributes_fan[1] },
1733         { .attrs = it87_attributes_fan[2] },
1734         { .attrs = it87_attributes_fan[3] },
1735         { .attrs = it87_attributes_fan[4] },
1736         { .attrs = it87_attributes_fan[5] },
1737 };
1738 
1739 static const struct attribute *it87_attributes_fan_div[] = {
1740         &sensor_dev_attr_fan1_div.dev_attr.attr,
1741         &sensor_dev_attr_fan2_div.dev_attr.attr,
1742         &sensor_dev_attr_fan3_div.dev_attr.attr,
1743 };
1744 
1745 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1746         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1747         &sensor_dev_attr_pwm1.dev_attr.attr,
1748         &dev_attr_pwm1_freq.attr,
1749         &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1750         NULL
1751 }, {
1752         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1753         &sensor_dev_attr_pwm2.dev_attr.attr,
1754         &dev_attr_pwm2_freq.attr,
1755         &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1756         NULL
1757 }, {
1758         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1759         &sensor_dev_attr_pwm3.dev_attr.attr,
1760         &dev_attr_pwm3_freq.attr,
1761         &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1762         NULL
1763 } };
1764 
1765 static const struct attribute_group it87_group_pwm[3] = {
1766         { .attrs = it87_attributes_pwm[0] },
1767         { .attrs = it87_attributes_pwm[1] },
1768         { .attrs = it87_attributes_pwm[2] },
1769 };
1770 
1771 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1772         &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1773         &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1774         &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1775         &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1776         &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1777         &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1778         &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1779         &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1780         &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1781         NULL
1782 }, {
1783         &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1784         &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1785         &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1786         &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1787         &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1788         &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1789         &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1790         &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1791         &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1792         NULL
1793 }, {
1794         &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1795         &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1796         &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1797         &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1798         &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1799         &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1800         &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1801         &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1802         &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1803         NULL
1804 } };
1805 
1806 static const struct attribute_group it87_group_autopwm[3] = {
1807         { .attrs = it87_attributes_autopwm[0] },
1808         { .attrs = it87_attributes_autopwm[1] },
1809         { .attrs = it87_attributes_autopwm[2] },
1810 };
1811 
1812 static struct attribute *it87_attributes_fan_beep[] = {
1813         &sensor_dev_attr_fan1_beep.dev_attr.attr,
1814         &sensor_dev_attr_fan2_beep.dev_attr.attr,
1815         &sensor_dev_attr_fan3_beep.dev_attr.attr,
1816         &sensor_dev_attr_fan4_beep.dev_attr.attr,
1817         &sensor_dev_attr_fan5_beep.dev_attr.attr,
1818         &sensor_dev_attr_fan6_beep.dev_attr.attr,
1819 };
1820 
1821 static struct attribute *it87_attributes_vid[] = {
1822         &dev_attr_vrm.attr,
1823         &dev_attr_cpu0_vid.attr,
1824         NULL
1825 };
1826 
1827 static const struct attribute_group it87_group_vid = {
1828         .attrs = it87_attributes_vid,
1829 };
1830 
1831 static struct attribute *it87_attributes_label[] = {
1832         &sensor_dev_attr_in3_label.dev_attr.attr,
1833         &sensor_dev_attr_in7_label.dev_attr.attr,
1834         &sensor_dev_attr_in8_label.dev_attr.attr,
1835         &sensor_dev_attr_in9_label.dev_attr.attr,
1836         NULL
1837 };
1838 
1839 static const struct attribute_group it87_group_label = {
1840         .attrs = it87_attributes_label,
1841 };
1842 
1843 /* SuperIO detection - will change isa_address if a chip is found */
1844 static int __init it87_find(unsigned short *address,
1845         struct it87_sio_data *sio_data)
1846 {
1847         int err;
1848         u16 chip_type;
1849         const char *board_vendor, *board_name;
1850         const struct it87_devices *config;
1851 
1852         err = superio_enter();
1853         if (err)
1854                 return err;
1855 
1856         err = -ENODEV;
1857         chip_type = force_id ? force_id : superio_inw(DEVID);
1858 
1859         switch (chip_type) {
1860         case IT8705F_DEVID:
1861                 sio_data->type = it87;
1862                 break;
1863         case IT8712F_DEVID:
1864                 sio_data->type = it8712;
1865                 break;
1866         case IT8716F_DEVID:
1867         case IT8726F_DEVID:
1868                 sio_data->type = it8716;
1869                 break;
1870         case IT8718F_DEVID:
1871                 sio_data->type = it8718;
1872                 break;
1873         case IT8720F_DEVID:
1874                 sio_data->type = it8720;
1875                 break;
1876         case IT8721F_DEVID:
1877                 sio_data->type = it8721;
1878                 break;
1879         case IT8728F_DEVID:
1880                 sio_data->type = it8728;
1881                 break;
1882         case IT8732F_DEVID:
1883                 sio_data->type = it8732;
1884                 break;
1885         case IT8771E_DEVID:
1886                 sio_data->type = it8771;
1887                 break;
1888         case IT8772E_DEVID:
1889                 sio_data->type = it8772;
1890                 break;
1891         case IT8781F_DEVID:
1892                 sio_data->type = it8781;
1893                 break;
1894         case IT8782F_DEVID:
1895                 sio_data->type = it8782;
1896                 break;
1897         case IT8783E_DEVID:
1898                 sio_data->type = it8783;
1899                 break;
1900         case IT8786E_DEVID:
1901                 sio_data->type = it8786;
1902                 break;
1903         case IT8790E_DEVID:
1904                 sio_data->type = it8790;
1905                 break;
1906         case IT8603E_DEVID:
1907         case IT8623E_DEVID:
1908                 sio_data->type = it8603;
1909                 break;
1910         case IT8620E_DEVID:
1911                 sio_data->type = it8620;
1912                 break;
1913         case 0xffff:    /* No device at all */
1914                 goto exit;
1915         default:
1916                 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1917                 goto exit;
1918         }
1919 
1920         superio_select(PME);
1921         if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1922                 pr_info("Device not activated, skipping\n");
1923                 goto exit;
1924         }
1925 
1926         *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1927         if (*address == 0) {
1928                 pr_info("Base address not set, skipping\n");
1929                 goto exit;
1930         }
1931 
1932         err = 0;
1933         sio_data->revision = superio_inb(DEVREV) & 0x0f;
1934         pr_info("Found IT%04x%s chip at 0x%x, revision %d\n", chip_type,
1935                 it87_devices[sio_data->type].suffix,
1936                 *address, sio_data->revision);
1937 
1938         config = &it87_devices[sio_data->type];
1939 
1940         /* in7 (VSB or VCCH5V) is always internal on some chips */
1941         if (has_in7_internal(config))
1942                 sio_data->internal |= (1 << 1);
1943 
1944         /* in8 (Vbat) is always internal */
1945         sio_data->internal |= (1 << 2);
1946 
1947         /* Only the IT8603E has in9 */
1948         if (sio_data->type != it8603)
1949                 sio_data->skip_in |= (1 << 9);
1950 
1951         if (!has_vid(config))
1952                 sio_data->skip_vid = 1;
1953 
1954         /* Read GPIO config and VID value from LDN 7 (GPIO) */
1955         if (sio_data->type == it87) {
1956                 /* The IT8705F has a different LD number for GPIO */
1957                 superio_select(5);
1958                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1959         } else if (sio_data->type == it8783) {
1960                 int reg25, reg27, reg2a, reg2c, regef;
1961 
1962                 superio_select(GPIO);
1963 
1964                 reg25 = superio_inb(IT87_SIO_GPIO1_REG);
1965                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1966                 reg2a = superio_inb(IT87_SIO_PINX1_REG);
1967                 reg2c = superio_inb(IT87_SIO_PINX2_REG);
1968                 regef = superio_inb(IT87_SIO_SPI_REG);
1969 
1970                 /* Check if fan3 is there or not */
1971                 if ((reg27 & (1 << 0)) || !(reg2c & (1 << 2)))
1972                         sio_data->skip_fan |= (1 << 2);
1973                 if ((reg25 & (1 << 4))
1974                     || (!(reg2a & (1 << 1)) && (regef & (1 << 0))))
1975                         sio_data->skip_pwm |= (1 << 2);
1976 
1977                 /* Check if fan2 is there or not */
1978                 if (reg27 & (1 << 7))
1979                         sio_data->skip_fan |= (1 << 1);
1980                 if (reg27 & (1 << 3))
1981                         sio_data->skip_pwm |= (1 << 1);
1982 
1983                 /* VIN5 */
1984                 if ((reg27 & (1 << 0)) || (reg2c & (1 << 2)))
1985                         sio_data->skip_in |= (1 << 5); /* No VIN5 */
1986 
1987                 /* VIN6 */
1988                 if (reg27 & (1 << 1))
1989                         sio_data->skip_in |= (1 << 6); /* No VIN6 */
1990 
1991                 /*
1992                  * VIN7
1993                  * Does not depend on bit 2 of Reg2C, contrary to datasheet.
1994                  */
1995                 if (reg27 & (1 << 2)) {
1996                         /*
1997                          * The data sheet is a bit unclear regarding the
1998                          * internal voltage divider for VCCH5V. It says
1999                          * "This bit enables and switches VIN7 (pin 91) to the
2000                          * internal voltage divider for VCCH5V".
2001                          * This is different to other chips, where the internal
2002                          * voltage divider would connect VIN7 to an internal
2003                          * voltage source. Maybe that is the case here as well.
2004                          *
2005                          * Since we don't know for sure, re-route it if that is
2006                          * not the case, and ask the user to report if the
2007                          * resulting voltage is sane.
2008                          */
2009                         if (!(reg2c & (1 << 1))) {
2010                                 reg2c |= (1 << 1);
2011                                 superio_outb(IT87_SIO_PINX2_REG, reg2c);
2012                                 pr_notice("Routing internal VCCH5V to in7.\n");
2013                         }
2014                         pr_notice("in7 routed to internal voltage divider, with external pin disabled.\n");
2015                         pr_notice("Please report if it displays a reasonable voltage.\n");
2016                 }
2017 
2018                 if (reg2c & (1 << 0))
2019                         sio_data->internal |= (1 << 0);
2020                 if (reg2c & (1 << 1))
2021                         sio_data->internal |= (1 << 1);
2022 
2023                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
2024         } else if (sio_data->type == it8603) {
2025                 int reg27, reg29;
2026 
2027                 superio_select(GPIO);
2028 
2029                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
2030 
2031                 /* Check if fan3 is there or not */
2032                 if (reg27 & (1 << 6))
2033                         sio_data->skip_pwm |= (1 << 2);
2034                 if (reg27 & (1 << 7))
2035                         sio_data->skip_fan |= (1 << 2);
2036 
2037                 /* Check if fan2 is there or not */
2038                 reg29 = superio_inb(IT87_SIO_GPIO5_REG);
2039                 if (reg29 & (1 << 1))
2040                         sio_data->skip_pwm |= (1 << 1);
2041                 if (reg29 & (1 << 2))
2042                         sio_data->skip_fan |= (1 << 1);
2043 
2044                 sio_data->skip_in |= (1 << 5); /* No VIN5 */
2045                 sio_data->skip_in |= (1 << 6); /* No VIN6 */
2046 
2047                 sio_data->internal |= (1 << 3); /* in9 is AVCC */
2048 
2049                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
2050         } else if (sio_data->type == it8620) {
2051                 int reg;
2052 
2053                 superio_select(GPIO);
2054 
2055                 /* Check for fan4, fan5 */
2056                 reg = superio_inb(IT87_SIO_GPIO2_REG);
2057                 if (!(reg & (1 << 5)))
2058                         sio_data->skip_fan |= (1 << 3);
2059                 if (!(reg & (1 << 4)))
2060                         sio_data->skip_fan |= (1 << 4);
2061 
2062                 /* Check for pwm3, fan3 */
2063                 reg = superio_inb(IT87_SIO_GPIO3_REG);
2064                 if (reg & (1 << 6))
2065                         sio_data->skip_pwm |= (1 << 2);
2066                 if (reg & (1 << 7))
2067                         sio_data->skip_fan |= (1 << 2);
2068 
2069                 /* Check for pwm2, fan2 */
2070                 reg = superio_inb(IT87_SIO_GPIO5_REG);
2071                 if (reg & (1 << 1))
2072                         sio_data->skip_pwm |= (1 << 1);
2073                 if (reg & (1 << 2))
2074                         sio_data->skip_fan |= (1 << 1);
2075 
2076                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
2077         } else {
2078                 int reg;
2079                 bool uart6;
2080 
2081                 superio_select(GPIO);
2082 
2083                 reg = superio_inb(IT87_SIO_GPIO3_REG);
2084                 if (!sio_data->skip_vid) {
2085                         /* We need at least 4 VID pins */
2086                         if (reg & 0x0f) {
2087                                 pr_info("VID is disabled (pins used for GPIO)\n");
2088                                 sio_data->skip_vid = 1;
2089                         }
2090                 }
2091 
2092                 /* Check if fan3 is there or not */
2093                 if (reg & (1 << 6))
2094                         sio_data->skip_pwm |= (1 << 2);
2095                 if (reg & (1 << 7))
2096                         sio_data->skip_fan |= (1 << 2);
2097 
2098                 /* Check if fan2 is there or not */
2099                 reg = superio_inb(IT87_SIO_GPIO5_REG);
2100                 if (reg & (1 << 1))
2101                         sio_data->skip_pwm |= (1 << 1);
2102                 if (reg & (1 << 2))
2103                         sio_data->skip_fan |= (1 << 1);
2104 
2105                 if ((sio_data->type == it8718 || sio_data->type == it8720)
2106                  && !(sio_data->skip_vid))
2107                         sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
2108 
2109                 reg = superio_inb(IT87_SIO_PINX2_REG);
2110 
2111                 uart6 = sio_data->type == it8782 && (reg & (1 << 2));
2112 
2113                 /*
2114                  * The IT8720F has no VIN7 pin, so VCCH should always be
2115                  * routed internally to VIN7 with an internal divider.
2116                  * Curiously, there still is a configuration bit to control
2117                  * this, which means it can be set incorrectly. And even
2118                  * more curiously, many boards out there are improperly
2119                  * configured, even though the IT8720F datasheet claims
2120                  * that the internal routing of VCCH to VIN7 is the default
2121                  * setting. So we force the internal routing in this case.
2122                  *
2123                  * On IT8782F, VIN7 is multiplexed with one of the UART6 pins.
2124                  * If UART6 is enabled, re-route VIN7 to the internal divider
2125                  * if that is not already the case.
2126                  */
2127                 if ((sio_data->type == it8720 || uart6) && !(reg & (1 << 1))) {
2128                         reg |= (1 << 1);
2129                         superio_outb(IT87_SIO_PINX2_REG, reg);
2130                         pr_notice("Routing internal VCCH to in7\n");
2131                 }
2132                 if (reg & (1 << 0))
2133                         sio_data->internal |= (1 << 0);
2134                 if (reg & (1 << 1))
2135                         sio_data->internal |= (1 << 1);
2136 
2137                 /*
2138                  * On IT8782F, UART6 pins overlap with VIN5, VIN6, and VIN7.
2139                  * While VIN7 can be routed to the internal voltage divider,
2140                  * VIN5 and VIN6 are not available if UART6 is enabled.
2141                  *
2142                  * Also, temp3 is not available if UART6 is enabled and TEMPIN3
2143                  * is the temperature source. Since we can not read the
2144                  * temperature source here, skip_temp is preliminary.
2145                  */
2146                 if (uart6) {
2147                         sio_data->skip_in |= (1 << 5) | (1 << 6);
2148                         sio_data->skip_temp |= (1 << 2);
2149                 }
2150 
2151                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
2152         }
2153         if (sio_data->beep_pin)
2154                 pr_info("Beeping is supported\n");
2155 
2156         /* Disable specific features based on DMI strings */
2157         board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
2158         board_name = dmi_get_system_info(DMI_BOARD_NAME);
2159         if (board_vendor && board_name) {
2160                 if (strcmp(board_vendor, "nVIDIA") == 0
2161                  && strcmp(board_name, "FN68PT") == 0) {
2162                         /*
2163                          * On the Shuttle SN68PT, FAN_CTL2 is apparently not
2164                          * connected to a fan, but to something else. One user
2165                          * has reported instant system power-off when changing
2166                          * the PWM2 duty cycle, so we disable it.
2167                          * I use the board name string as the trigger in case
2168                          * the same board is ever used in other systems.
2169                          */
2170                         pr_info("Disabling pwm2 due to hardware constraints\n");
2171                         sio_data->skip_pwm = (1 << 1);
2172                 }
2173         }
2174 
2175 exit:
2176         superio_exit();
2177         return err;
2178 }
2179 
2180 static void it87_remove_files(struct device *dev)
2181 {
2182         struct it87_data *data = platform_get_drvdata(pdev);
2183         struct it87_sio_data *sio_data = dev_get_platdata(dev);
2184         int i;
2185 
2186         sysfs_remove_group(&dev->kobj, &it87_group);
2187         for (i = 0; i < 10; i++) {
2188                 if (sio_data->skip_in & (1 << i))
2189                         continue;
2190                 sysfs_remove_group(&dev->kobj, &it87_group_in[i]);
2191                 if (it87_attributes_in_beep[i])
2192                         sysfs_remove_file(&dev->kobj,
2193                                           it87_attributes_in_beep[i]);
2194         }
2195         for (i = 0; i < 3; i++) {
2196                 if (!(data->has_temp & (1 << i)))
2197                         continue;
2198                 sysfs_remove_group(&dev->kobj, &it87_group_temp[i]);
2199                 if (has_temp_offset(data))
2200                         sysfs_remove_file(&dev->kobj,
2201                                           it87_attributes_temp_offset[i]);
2202                 if (sio_data->beep_pin)
2203                         sysfs_remove_file(&dev->kobj,
2204                                           it87_attributes_temp_beep[i]);
2205         }
2206         for (i = 0; i < 6; i++) {
2207                 if (!(data->has_fan & (1 << i)))
2208                         continue;
2209                 sysfs_remove_group(&dev->kobj, &it87_group_fan[i]);
2210                 if (sio_data->beep_pin)
2211                         sysfs_remove_file(&dev->kobj,
2212                                           it87_attributes_fan_beep[i]);
2213                 if (i < 3 && !has_16bit_fans(data))
2214                         sysfs_remove_file(&dev->kobj,
2215                                           it87_attributes_fan_div[i]);
2216         }
2217         for (i = 0; i < 3; i++) {
2218                 if (sio_data->skip_pwm & (1 << i))
2219                         continue;
2220                 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
2221                 if (has_old_autopwm(data))
2222                         sysfs_remove_group(&dev->kobj,
2223                                            &it87_group_autopwm[i]);
2224         }
2225         if (!sio_data->skip_vid)
2226                 sysfs_remove_group(&dev->kobj, &it87_group_vid);
2227         sysfs_remove_group(&dev->kobj, &it87_group_label);
2228 }
2229 
2230 static int it87_probe(struct platform_device *pdev)
2231 {
2232         struct it87_data *data;
2233         struct resource *res;
2234         struct device *dev = &pdev->dev;
2235         struct it87_sio_data *sio_data = dev_get_platdata(dev);
2236         int err = 0, i;
2237         int enable_pwm_interface;
2238         int fan_beep_need_rw;
2239 
2240         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
2241         if (!devm_request_region(&pdev->dev, res->start, IT87_EC_EXTENT,
2242                                  DRVNAME)) {
2243                 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
2244                         (unsigned long)res->start,
2245                         (unsigned long)(res->start + IT87_EC_EXTENT - 1));
2246                 return -EBUSY;
2247         }
2248 
2249         data = devm_kzalloc(&pdev->dev, sizeof(struct it87_data), GFP_KERNEL);
2250         if (!data)
2251                 return -ENOMEM;
2252 
2253         data->addr = res->start;
2254         data->type = sio_data->type;
2255         data->features = it87_devices[sio_data->type].features;
2256         data->peci_mask = it87_devices[sio_data->type].peci_mask;
2257         data->old_peci_mask = it87_devices[sio_data->type].old_peci_mask;
2258         data->name = it87_devices[sio_data->type].name;
2259         /*
2260          * IT8705F Datasheet 0.4.1, 3h == Version G.
2261          * IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
2262          * These are the first revisions with 16-bit tachometer support.
2263          */
2264         switch (data->type) {
2265         case it87:
2266                 if (sio_data->revision >= 0x03) {
2267                         data->features &= ~FEAT_OLD_AUTOPWM;
2268                         data->features |= FEAT_FAN16_CONFIG | FEAT_16BIT_FANS;
2269                 }
2270                 break;
2271         case it8712:
2272                 if (sio_data->revision >= 0x08) {
2273                         data->features &= ~FEAT_OLD_AUTOPWM;
2274                         data->features |= FEAT_FAN16_CONFIG | FEAT_16BIT_FANS |
2275                                           FEAT_FIVE_FANS;
2276                 }
2277                 break;
2278         default:
2279                 break;
2280         }
2281 
2282         /* Now, we do the remaining detection. */
2283         if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
2284          || it87_read_value(data, IT87_REG_CHIPID) != 0x90)
2285                 return -ENODEV;
2286 
2287         platform_set_drvdata(pdev, data);
2288 
2289         mutex_init(&data->update_lock);
2290 
2291         /* Check PWM configuration */
2292         enable_pwm_interface = it87_check_pwm(dev);
2293 
2294         /* Starting with IT8721F, we handle scaling of internal voltages */
2295         if (has_12mv_adc(data)) {
2296                 if (sio_data->internal & (1 << 0))
2297                         data->in_scaled |= (1 << 3);    /* in3 is AVCC */
2298                 if (sio_data->internal & (1 << 1))
2299                         data->in_scaled |= (1 << 7);    /* in7 is VSB */
2300                 if (sio_data->internal & (1 << 2))
2301                         data->in_scaled |= (1 << 8);    /* in8 is Vbat */
2302                 if (sio_data->internal & (1 << 3))
2303                         data->in_scaled |= (1 << 9);    /* in9 is AVCC */
2304         } else if (sio_data->type == it8781 || sio_data->type == it8782 ||
2305                    sio_data->type == it8783) {
2306                 if (sio_data->internal & (1 << 0))
2307                         data->in_scaled |= (1 << 3);    /* in3 is VCC5V */
2308                 if (sio_data->internal & (1 << 1))
2309                         data->in_scaled |= (1 << 7);    /* in7 is VCCH5V */
2310         }
2311 
2312         data->has_temp = 0x07;
2313         if (sio_data->skip_temp & (1 << 2)) {
2314                 if (sio_data->type == it8782
2315                     && !(it87_read_value(data, IT87_REG_TEMP_EXTRA) & 0x80))
2316                         data->has_temp &= ~(1 << 2);
2317         }
2318 
2319         /* Initialize the IT87 chip */
2320         it87_init_device(pdev);
2321 
2322         /* Register sysfs hooks */
2323         err = sysfs_create_group(&dev->kobj, &it87_group);
2324         if (err)
2325                 return err;
2326 
2327         for (i = 0; i < 10; i++) {
2328                 if (sio_data->skip_in & (1 << i))
2329                         continue;
2330                 err = sysfs_create_group(&dev->kobj, &it87_group_in[i]);
2331                 if (err)
2332                         goto error;
2333                 if (sio_data->beep_pin && it87_attributes_in_beep[i]) {
2334                         err = sysfs_create_file(&dev->kobj,
2335                                                 it87_attributes_in_beep[i]);
2336                         if (err)
2337                                 goto error;
2338                 }
2339         }
2340 
2341         for (i = 0; i < 3; i++) {
2342                 if (!(data->has_temp & (1 << i)))
2343                         continue;
2344                 err = sysfs_create_group(&dev->kobj, &it87_group_temp[i]);
2345                 if (err)
2346                         goto error;
2347                 if (has_temp_offset(data)) {
2348                         err = sysfs_create_file(&dev->kobj,
2349                                                 it87_attributes_temp_offset[i]);
2350                         if (err)
2351                                 goto error;
2352                 }
2353                 if (sio_data->beep_pin) {
2354                         err = sysfs_create_file(&dev->kobj,
2355                                                 it87_attributes_temp_beep[i]);
2356                         if (err)
2357                                 goto error;
2358                 }
2359         }
2360 
2361         /* Do not create fan files for disabled fans */
2362         fan_beep_need_rw = 1;
2363         for (i = 0; i < 6; i++) {
2364                 if (!(data->has_fan & (1 << i)))
2365                         continue;
2366                 err = sysfs_create_group(&dev->kobj, &it87_group_fan[i]);
2367                 if (err)
2368                         goto error;
2369 
2370                 if (i < 3 && !has_16bit_fans(data)) {
2371                         err = sysfs_create_file(&dev->kobj,
2372                                                 it87_attributes_fan_div[i]);
2373                         if (err)
2374                                 goto error;
2375                 }
2376 
2377                 if (sio_data->beep_pin) {
2378                         err = sysfs_create_file(&dev->kobj,
2379                                                 it87_attributes_fan_beep[i]);
2380                         if (err)
2381                                 goto error;
2382                         if (!fan_beep_need_rw)
2383                                 continue;
2384 
2385                         /*
2386                          * As we have a single beep enable bit for all fans,
2387                          * only the first enabled fan has a writable attribute
2388                          * for it.
2389                          */
2390                         if (sysfs_chmod_file(&dev->kobj,
2391                                              it87_attributes_fan_beep[i],
2392                                              S_IRUGO | S_IWUSR))
2393                                 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
2394                                         i + 1);
2395                         fan_beep_need_rw = 0;
2396                 }
2397         }
2398 
2399         if (enable_pwm_interface) {
2400                 for (i = 0; i < 3; i++) {
2401                         if (sio_data->skip_pwm & (1 << i))
2402                                 continue;
2403                         err = sysfs_create_group(&dev->kobj,
2404                                                  &it87_group_pwm[i]);
2405                         if (err)
2406                                 goto error;
2407 
2408                         if (!has_old_autopwm(data))
2409                                 continue;
2410                         err = sysfs_create_group(&dev->kobj,
2411                                                  &it87_group_autopwm[i]);
2412                         if (err)
2413                                 goto error;
2414                 }
2415         }
2416 
2417         if (!sio_data->skip_vid) {
2418                 data->vrm = vid_which_vrm();
2419                 /* VID reading from Super-I/O config space if available */
2420                 data->vid = sio_data->vid_value;
2421                 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
2422                 if (err)
2423                         goto error;
2424         }
2425 
2426         /* Export labels for internal sensors */
2427         for (i = 0; i < 4; i++) {
2428                 if (!(sio_data->internal & (1 << i)))
2429                         continue;
2430                 err = sysfs_create_file(&dev->kobj,
2431                                         it87_attributes_label[i]);
2432                 if (err)
2433                         goto error;
2434         }
2435 
2436         data->hwmon_dev = hwmon_device_register(dev);
2437         if (IS_ERR(data->hwmon_dev)) {
2438                 err = PTR_ERR(data->hwmon_dev);
2439                 goto error;
2440         }
2441 
2442         return 0;
2443 
2444 error:
2445         it87_remove_files(dev);
2446         return err;
2447 }
2448 
2449 static int it87_remove(struct platform_device *pdev)
2450 {
2451         struct it87_data *data = platform_get_drvdata(pdev);
2452 
2453         hwmon_device_unregister(data->hwmon_dev);
2454         it87_remove_files(&pdev->dev);
2455 
2456         return 0;
2457 }
2458 
2459 /*
2460  * Must be called with data->update_lock held, except during initialization.
2461  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2462  * would slow down the IT87 access and should not be necessary.
2463  */
2464 static int it87_read_value(struct it87_data *data, u8 reg)
2465 {
2466         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2467         return inb_p(data->addr + IT87_DATA_REG_OFFSET);
2468 }
2469 
2470 /*
2471  * Must be called with data->update_lock held, except during initialization.
2472  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2473  * would slow down the IT87 access and should not be necessary.
2474  */
2475 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
2476 {
2477         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2478         outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
2479 }
2480 
2481 /* Return 1 if and only if the PWM interface is safe to use */
2482 static int it87_check_pwm(struct device *dev)
2483 {
2484         struct it87_data *data = dev_get_drvdata(dev);
2485         /*
2486          * Some BIOSes fail to correctly configure the IT87 fans. All fans off
2487          * and polarity set to active low is sign that this is the case so we
2488          * disable pwm control to protect the user.
2489          */
2490         int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
2491         if ((tmp & 0x87) == 0) {
2492                 if (fix_pwm_polarity) {
2493                         /*
2494                          * The user asks us to attempt a chip reconfiguration.
2495                          * This means switching to active high polarity and
2496                          * inverting all fan speed values.
2497                          */
2498                         int i;
2499                         u8 pwm[3];
2500 
2501                         for (i = 0; i < 3; i++)
2502                                 pwm[i] = it87_read_value(data,
2503                                                          IT87_REG_PWM(i));
2504 
2505                         /*
2506                          * If any fan is in automatic pwm mode, the polarity
2507                          * might be correct, as suspicious as it seems, so we
2508                          * better don't change anything (but still disable the
2509                          * PWM interface).
2510                          */
2511                         if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
2512                                 dev_info(dev,
2513                                          "Reconfiguring PWM to active high polarity\n");
2514                                 it87_write_value(data, IT87_REG_FAN_CTL,
2515                                                  tmp | 0x87);
2516                                 for (i = 0; i < 3; i++)
2517                                         it87_write_value(data,
2518                                                          IT87_REG_PWM(i),
2519                                                          0x7f & ~pwm[i]);
2520                                 return 1;
2521                         }
2522 
2523                         dev_info(dev,
2524                                  "PWM configuration is too broken to be fixed\n");
2525                 }
2526 
2527                 dev_info(dev,
2528                          "Detected broken BIOS defaults, disabling PWM interface\n");
2529                 return 0;
2530         } else if (fix_pwm_polarity) {
2531                 dev_info(dev,
2532                          "PWM configuration looks sane, won't touch\n");
2533         }
2534 
2535         return 1;
2536 }
2537 
2538 /* Called when we have found a new IT87. */
2539 static void it87_init_device(struct platform_device *pdev)
2540 {
2541         struct it87_sio_data *sio_data = dev_get_platdata(&pdev->dev);
2542         struct it87_data *data = platform_get_drvdata(pdev);
2543         int tmp, i;
2544         u8 mask;
2545 
2546         /*
2547          * For each PWM channel:
2548          * - If it is in automatic mode, setting to manual mode should set
2549          *   the fan to full speed by default.
2550          * - If it is in manual mode, we need a mapping to temperature
2551          *   channels to use when later setting to automatic mode later.
2552          *   Use a 1:1 mapping by default (we are clueless.)
2553          * In both cases, the value can (and should) be changed by the user
2554          * prior to switching to a different mode.
2555          * Note that this is no longer needed for the IT8721F and later, as
2556          * these have separate registers for the temperature mapping and the
2557          * manual duty cycle.
2558          */
2559         for (i = 0; i < 3; i++) {
2560                 data->pwm_temp_map[i] = i;
2561                 data->pwm_duty[i] = 0x7f;       /* Full speed */
2562                 data->auto_pwm[i][3] = 0x7f;    /* Full speed, hard-coded */
2563         }
2564 
2565         /*
2566          * Some chips seem to have default value 0xff for all limit
2567          * registers. For low voltage limits it makes no sense and triggers
2568          * alarms, so change to 0 instead. For high temperature limits, it
2569          * means -1 degree C, which surprisingly doesn't trigger an alarm,
2570          * but is still confusing, so change to 127 degrees C.
2571          */
2572         for (i = 0; i < 8; i++) {
2573                 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
2574                 if (tmp == 0xff)
2575                         it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2576         }
2577         for (i = 0; i < 3; i++) {
2578                 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2579                 if (tmp == 0xff)
2580                         it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2581         }
2582 
2583         /*
2584          * Temperature channels are not forcibly enabled, as they can be
2585          * set to two different sensor types and we can't guess which one
2586          * is correct for a given system. These channels can be enabled at
2587          * run-time through the temp{1-3}_type sysfs accessors if needed.
2588          */
2589 
2590         /* Check if voltage monitors are reset manually or by some reason */
2591         tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2592         if ((tmp & 0xff) == 0) {
2593                 /* Enable all voltage monitors */
2594                 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2595         }
2596 
2597         /* Check if tachometers are reset manually or by some reason */
2598         mask = 0x70 & ~(sio_data->skip_fan << 4);
2599         data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2600         if ((data->fan_main_ctrl & mask) == 0) {
2601                 /* Enable all fan tachometers */
2602                 data->fan_main_ctrl |= mask;
2603                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2604                                  data->fan_main_ctrl);
2605         }
2606         data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2607 
2608         tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2609 
2610         /* Set tachometers to 16-bit mode if needed */
2611         if (has_fan16_config(data)) {
2612                 if (~tmp & 0x07 & data->has_fan) {
2613                         dev_dbg(&pdev->dev,
2614                                 "Setting fan1-3 to 16-bit mode\n");
2615                         it87_write_value(data, IT87_REG_FAN_16BIT,
2616                                          tmp | 0x07);
2617                 }
2618         }
2619 
2620         /* Check for additional fans */
2621         if (has_five_fans(data)) {
2622                 if (tmp & (1 << 4))
2623                         data->has_fan |= (1 << 3); /* fan4 enabled */
2624                 if (tmp & (1 << 5))
2625                         data->has_fan |= (1 << 4); /* fan5 enabled */
2626                 if (has_six_fans(data) && (tmp & (1 << 2)))
2627                         data->has_fan |= (1 << 5); /* fan6 enabled */
2628         }
2629 
2630         /* Fan input pins may be used for alternative functions */
2631         data->has_fan &= ~sio_data->skip_fan;
2632 
2633         /* Start monitoring */
2634         it87_write_value(data, IT87_REG_CONFIG,
2635                          (it87_read_value(data, IT87_REG_CONFIG) & 0x3e)
2636                          | (update_vbat ? 0x41 : 0x01));
2637 }
2638 
2639 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2640 {
2641         data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2642         if (has_newer_autopwm(data)) {
2643                 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2644                 data->pwm_duty[nr] = it87_read_value(data,
2645                                                      IT87_REG_PWM_DUTY(nr));
2646         } else {
2647                 if (data->pwm_ctrl[nr] & 0x80)  /* Automatic mode */
2648                         data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2649                 else                            /* Manual mode */
2650                         data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2651         }
2652 
2653         if (has_old_autopwm(data)) {
2654                 int i;
2655 
2656                 for (i = 0; i < 5 ; i++)
2657                         data->auto_temp[nr][i] = it87_read_value(data,
2658                                                 IT87_REG_AUTO_TEMP(nr, i));
2659                 for (i = 0; i < 3 ; i++)
2660                         data->auto_pwm[nr][i] = it87_read_value(data,
2661                                                 IT87_REG_AUTO_PWM(nr, i));
2662         }
2663 }
2664 
2665 static struct it87_data *it87_update_device(struct device *dev)
2666 {
2667         struct it87_data *data = dev_get_drvdata(dev);
2668         int i;
2669 
2670         mutex_lock(&data->update_lock);
2671 
2672         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2673             || !data->valid) {
2674                 if (update_vbat) {
2675                         /*
2676                          * Cleared after each update, so reenable.  Value
2677                          * returned by this read will be previous value
2678                          */
2679                         it87_write_value(data, IT87_REG_CONFIG,
2680                                 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2681                 }
2682                 for (i = 0; i <= 7; i++) {
2683                         data->in[i][0] =
2684                                 it87_read_value(data, IT87_REG_VIN(i));
2685                         data->in[i][1] =
2686                                 it87_read_value(data, IT87_REG_VIN_MIN(i));
2687                         data->in[i][2] =
2688                                 it87_read_value(data, IT87_REG_VIN_MAX(i));
2689                 }
2690                 /* in8 (battery) has no limit registers */
2691                 data->in[8][0] = it87_read_value(data, IT87_REG_VIN(8));
2692                 if (data->type == it8603)
2693                         data->in[9][0] = it87_read_value(data, 0x2f);
2694 
2695                 for (i = 0; i < 6; i++) {
2696                         /* Skip disabled fans */
2697                         if (!(data->has_fan & (1 << i)))
2698                                 continue;
2699 
2700                         data->fan[i][1] =
2701                                 it87_read_value(data, IT87_REG_FAN_MIN[i]);
2702                         data->fan[i][0] = it87_read_value(data,
2703                                        IT87_REG_FAN[i]);
2704                         /* Add high byte if in 16-bit mode */
2705                         if (has_16bit_fans(data)) {
2706                                 data->fan[i][0] |= it87_read_value(data,
2707                                                 IT87_REG_FANX[i]) << 8;
2708                                 data->fan[i][1] |= it87_read_value(data,
2709                                                 IT87_REG_FANX_MIN[i]) << 8;
2710                         }
2711                 }
2712                 for (i = 0; i < 3; i++) {
2713                         if (!(data->has_temp & (1 << i)))
2714                                 continue;
2715                         data->temp[i][0] =
2716                                 it87_read_value(data, IT87_REG_TEMP(i));
2717                         data->temp[i][1] =
2718                                 it87_read_value(data, IT87_REG_TEMP_LOW(i));
2719                         data->temp[i][2] =
2720                                 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2721                         if (has_temp_offset(data))
2722                                 data->temp[i][3] =
2723                                   it87_read_value(data,
2724                                                   IT87_REG_TEMP_OFFSET[i]);
2725                 }
2726 
2727                 /* Newer chips don't have clock dividers */
2728                 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2729                         i = it87_read_value(data, IT87_REG_FAN_DIV);
2730                         data->fan_div[0] = i & 0x07;
2731                         data->fan_div[1] = (i >> 3) & 0x07;
2732                         data->fan_div[2] = (i & 0x40) ? 3 : 1;
2733                 }
2734 
2735                 data->alarms =
2736                         it87_read_value(data, IT87_REG_ALARM1) |
2737                         (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2738                         (it87_read_value(data, IT87_REG_ALARM3) << 16);
2739                 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2740 
2741                 data->fan_main_ctrl = it87_read_value(data,
2742                                 IT87_REG_FAN_MAIN_CTRL);
2743                 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2744                 for (i = 0; i < 3; i++)
2745                         it87_update_pwm_ctrl(data, i);
2746 
2747                 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2748                 data->extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
2749                 /*
2750                  * The IT8705F does not have VID capability.
2751                  * The IT8718F and later don't use IT87_REG_VID for the
2752                  * same purpose.
2753                  */
2754                 if (data->type == it8712 || data->type == it8716) {
2755                         data->vid = it87_read_value(data, IT87_REG_VID);
2756                         /*
2757                          * The older IT8712F revisions had only 5 VID pins,
2758                          * but we assume it is always safe to read 6 bits.
2759                          */
2760                         data->vid &= 0x3f;
2761                 }
2762                 data->last_updated = jiffies;
2763                 data->valid = 1;
2764         }
2765 
2766         mutex_unlock(&data->update_lock);
2767 
2768         return data;
2769 }
2770 
2771 static int __init it87_device_add(unsigned short address,
2772                                   const struct it87_sio_data *sio_data)
2773 {
2774         struct resource res = {
2775                 .start  = address + IT87_EC_OFFSET,
2776                 .end    = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2777                 .name   = DRVNAME,
2778                 .flags  = IORESOURCE_IO,
2779         };
2780         int err;
2781 
2782         err = acpi_check_resource_conflict(&res);
2783         if (err)
2784                 goto exit;
2785 
2786         pdev = platform_device_alloc(DRVNAME, address);
2787         if (!pdev) {
2788                 err = -ENOMEM;
2789                 pr_err("Device allocation failed\n");
2790                 goto exit;
2791         }
2792 
2793         err = platform_device_add_resources(pdev, &res, 1);
2794         if (err) {
2795                 pr_err("Device resource addition failed (%d)\n", err);
2796                 goto exit_device_put;
2797         }
2798 
2799         err = platform_device_add_data(pdev, sio_data,
2800                                        sizeof(struct it87_sio_data));
2801         if (err) {
2802                 pr_err("Platform data allocation failed\n");
2803                 goto exit_device_put;
2804         }
2805 
2806         err = platform_device_add(pdev);
2807         if (err) {
2808                 pr_err("Device addition failed (%d)\n", err);
2809                 goto exit_device_put;
2810         }
2811 
2812         return 0;
2813 
2814 exit_device_put:
2815         platform_device_put(pdev);
2816 exit:
2817         return err;
2818 }
2819 
2820 static int __init sm_it87_init(void)
2821 {
2822         int err;
2823         unsigned short isa_address = 0;
2824         struct it87_sio_data sio_data;
2825 
2826         memset(&sio_data, 0, sizeof(struct it87_sio_data));
2827         err = it87_find(&isa_address, &sio_data);
2828         if (err)
2829                 return err;
2830         err = platform_driver_register(&it87_driver);
2831         if (err)
2832                 return err;
2833 
2834         err = it87_device_add(isa_address, &sio_data);
2835         if (err) {
2836                 platform_driver_unregister(&it87_driver);
2837                 return err;
2838         }
2839 
2840         return 0;
2841 }
2842 
2843 static void __exit sm_it87_exit(void)
2844 {
2845         platform_device_unregister(pdev);
2846         platform_driver_unregister(&it87_driver);
2847 }
2848 
2849 
2850 MODULE_AUTHOR("Chris Gauthron, Jean Delvare <jdelvare@suse.de>");
2851 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2852 module_param(update_vbat, bool, 0);
2853 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2854 module_param(fix_pwm_polarity, bool, 0);
2855 MODULE_PARM_DESC(fix_pwm_polarity,
2856                  "Force PWM polarity to active high (DANGEROUS)");
2857 MODULE_LICENSE("GPL");
2858 
2859 module_init(sm_it87_init);
2860 module_exit(sm_it87_exit);
2861 

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