hwmon: (lm90) Restore configuration on exit
[linux-2.6.git] / drivers / hwmon / w83781d.c
1 /*
2     w83781d.c - Part of lm_sensors, Linux kernel modules for hardware
3                 monitoring
4     Copyright (c) 1998 - 2001  Frodo Looijaard <frodol@dds.nl>,
5                                Philip Edelbrock <phil@netroedge.com>,
6                                and Mark Studebaker <mdsxyz123@yahoo.com>
7     Copyright (c) 2007 - 2008  Jean Delvare <khali@linux-fr.org>
8
9     This program is free software; you can redistribute it and/or modify
10     it under the terms of the GNU General Public License as published by
11     the Free Software Foundation; either version 2 of the License, or
12     (at your option) any later version.
13
14     This program is distributed in the hope that it will be useful,
15     but WITHOUT ANY WARRANTY; without even the implied warranty of
16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17     GNU General Public License for more details.
18
19     You should have received a copy of the GNU General Public License
20     along with this program; if not, write to the Free Software
21     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24 /*
25     Supports following chips:
26
27     Chip        #vin    #fanin  #pwm    #temp   wchipid vendid  i2c     ISA
28     as99127f    7       3       0       3       0x31    0x12c3  yes     no
29     as99127f rev.2 (type_name = as99127f)       0x31    0x5ca3  yes     no
30     w83781d     7       3       0       3       0x10-1  0x5ca3  yes     yes
31     w83782d     9       3       2-4     3       0x30    0x5ca3  yes     yes
32     w83783s     5-6     3       2       1-2     0x40    0x5ca3  yes     no
33
34 */
35
36 #include <linux/module.h>
37 #include <linux/init.h>
38 #include <linux/slab.h>
39 #include <linux/jiffies.h>
40 #include <linux/i2c.h>
41 #include <linux/hwmon.h>
42 #include <linux/hwmon-vid.h>
43 #include <linux/hwmon-sysfs.h>
44 #include <linux/sysfs.h>
45 #include <linux/err.h>
46 #include <linux/mutex.h>
47
48 #ifdef CONFIG_ISA
49 #include <linux/platform_device.h>
50 #include <linux/ioport.h>
51 #include <linux/io.h>
52 #endif
53
54 #include "lm75.h"
55
56 /* Addresses to scan */
57 static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
58                                                 0x2e, 0x2f, I2C_CLIENT_END };
59
60 enum chips { w83781d, w83782d, w83783s, as99127f };
61
62 /* Insmod parameters */
63 static unsigned short force_subclients[4];
64 module_param_array(force_subclients, short, NULL, 0);
65 MODULE_PARM_DESC(force_subclients, "List of subclient addresses: "
66                     "{bus, clientaddr, subclientaddr1, subclientaddr2}");
67
68 static int reset;
69 module_param(reset, bool, 0);
70 MODULE_PARM_DESC(reset, "Set to one to reset chip on load");
71
72 static int init = 1;
73 module_param(init, bool, 0);
74 MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization");
75
76 /* Constants specified below */
77
78 /* Length of ISA address segment */
79 #define W83781D_EXTENT                  8
80
81 /* Where are the ISA address/data registers relative to the base address */
82 #define W83781D_ADDR_REG_OFFSET         5
83 #define W83781D_DATA_REG_OFFSET         6
84
85 /* The device registers */
86 /* in nr from 0 to 8 */
87 #define W83781D_REG_IN_MAX(nr)          ((nr < 7) ? (0x2b + (nr) * 2) : \
88                                                     (0x554 + (((nr) - 7) * 2)))
89 #define W83781D_REG_IN_MIN(nr)          ((nr < 7) ? (0x2c + (nr) * 2) : \
90                                                     (0x555 + (((nr) - 7) * 2)))
91 #define W83781D_REG_IN(nr)              ((nr < 7) ? (0x20 + (nr)) : \
92                                                     (0x550 + (nr) - 7))
93
94 /* fan nr from 0 to 2 */
95 #define W83781D_REG_FAN_MIN(nr)         (0x3b + (nr))
96 #define W83781D_REG_FAN(nr)             (0x28 + (nr))
97
98 #define W83781D_REG_BANK                0x4E
99 #define W83781D_REG_TEMP2_CONFIG        0x152
100 #define W83781D_REG_TEMP3_CONFIG        0x252
101 /* temp nr from 1 to 3 */
102 #define W83781D_REG_TEMP(nr)            ((nr == 3) ? (0x0250) : \
103                                         ((nr == 2) ? (0x0150) : \
104                                                      (0x27)))
105 #define W83781D_REG_TEMP_HYST(nr)       ((nr == 3) ? (0x253) : \
106                                         ((nr == 2) ? (0x153) : \
107                                                      (0x3A)))
108 #define W83781D_REG_TEMP_OVER(nr)       ((nr == 3) ? (0x255) : \
109                                         ((nr == 2) ? (0x155) : \
110                                                      (0x39)))
111
112 #define W83781D_REG_CONFIG              0x40
113
114 /* Interrupt status (W83781D, AS99127F) */
115 #define W83781D_REG_ALARM1              0x41
116 #define W83781D_REG_ALARM2              0x42
117
118 /* Real-time status (W83782D, W83783S) */
119 #define W83782D_REG_ALARM1              0x459
120 #define W83782D_REG_ALARM2              0x45A
121 #define W83782D_REG_ALARM3              0x45B
122
123 #define W83781D_REG_BEEP_CONFIG         0x4D
124 #define W83781D_REG_BEEP_INTS1          0x56
125 #define W83781D_REG_BEEP_INTS2          0x57
126 #define W83781D_REG_BEEP_INTS3          0x453   /* not on W83781D */
127
128 #define W83781D_REG_VID_FANDIV          0x47
129
130 #define W83781D_REG_CHIPID              0x49
131 #define W83781D_REG_WCHIPID             0x58
132 #define W83781D_REG_CHIPMAN             0x4F
133 #define W83781D_REG_PIN                 0x4B
134
135 /* 782D/783S only */
136 #define W83781D_REG_VBAT                0x5D
137
138 /* PWM 782D (1-4) and 783S (1-2) only */
139 static const u8 W83781D_REG_PWM[] = { 0x5B, 0x5A, 0x5E, 0x5F };
140 #define W83781D_REG_PWMCLK12            0x5C
141 #define W83781D_REG_PWMCLK34            0x45C
142
143 #define W83781D_REG_I2C_ADDR            0x48
144 #define W83781D_REG_I2C_SUBADDR         0x4A
145
146 /* The following are undocumented in the data sheets however we
147    received the information in an email from Winbond tech support */
148 /* Sensor selection - not on 781d */
149 #define W83781D_REG_SCFG1               0x5D
150 static const u8 BIT_SCFG1[] = { 0x02, 0x04, 0x08 };
151
152 #define W83781D_REG_SCFG2               0x59
153 static const u8 BIT_SCFG2[] = { 0x10, 0x20, 0x40 };
154
155 #define W83781D_DEFAULT_BETA            3435
156
157 /* Conversions */
158 #define IN_TO_REG(val)                  SENSORS_LIMIT(((val) + 8) / 16, 0, 255)
159 #define IN_FROM_REG(val)                ((val) * 16)
160
161 static inline u8
162 FAN_TO_REG(long rpm, int div)
163 {
164         if (rpm == 0)
165                 return 255;
166         rpm = SENSORS_LIMIT(rpm, 1, 1000000);
167         return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
168 }
169
170 static inline long
171 FAN_FROM_REG(u8 val, int div)
172 {
173         if (val == 0)
174                 return -1;
175         if (val == 255)
176                 return 0;
177         return 1350000 / (val * div);
178 }
179
180 #define TEMP_TO_REG(val)                SENSORS_LIMIT((val) / 1000, -127, 128)
181 #define TEMP_FROM_REG(val)              ((val) * 1000)
182
183 #define BEEP_MASK_FROM_REG(val,type)    ((type) == as99127f ? \
184                                          (~(val)) & 0x7fff : (val) & 0xff7fff)
185 #define BEEP_MASK_TO_REG(val,type)      ((type) == as99127f ? \
186                                          (~(val)) & 0x7fff : (val) & 0xff7fff)
187
188 #define DIV_FROM_REG(val)               (1 << (val))
189
190 static inline u8
191 DIV_TO_REG(long val, enum chips type)
192 {
193         int i;
194         val = SENSORS_LIMIT(val, 1,
195                             ((type == w83781d
196                               || type == as99127f) ? 8 : 128)) >> 1;
197         for (i = 0; i < 7; i++) {
198                 if (val == 0)
199                         break;
200                 val >>= 1;
201         }
202         return i;
203 }
204
205 struct w83781d_data {
206         struct i2c_client *client;
207         struct device *hwmon_dev;
208         struct mutex lock;
209         enum chips type;
210
211         /* For ISA device only */
212         const char *name;
213         int isa_addr;
214
215         struct mutex update_lock;
216         char valid;             /* !=0 if following fields are valid */
217         unsigned long last_updated;     /* In jiffies */
218
219         struct i2c_client *lm75[2];     /* for secondary I2C addresses */
220         /* array of 2 pointers to subclients */
221
222         u8 in[9];               /* Register value - 8 & 9 for 782D only */
223         u8 in_max[9];           /* Register value - 8 & 9 for 782D only */
224         u8 in_min[9];           /* Register value - 8 & 9 for 782D only */
225         u8 fan[3];              /* Register value */
226         u8 fan_min[3];          /* Register value */
227         s8 temp;                /* Register value */
228         s8 temp_max;            /* Register value */
229         s8 temp_max_hyst;       /* Register value */
230         u16 temp_add[2];        /* Register value */
231         u16 temp_max_add[2];    /* Register value */
232         u16 temp_max_hyst_add[2];       /* Register value */
233         u8 fan_div[3];          /* Register encoding, shifted right */
234         u8 vid;                 /* Register encoding, combined */
235         u32 alarms;             /* Register encoding, combined */
236         u32 beep_mask;          /* Register encoding, combined */
237         u8 pwm[4];              /* Register value */
238         u8 pwm2_enable;         /* Boolean */
239         u16 sens[3];            /* 782D/783S only.
240                                    1 = pentium diode; 2 = 3904 diode;
241                                    4 = thermistor */
242         u8 vrm;
243 };
244
245 static struct w83781d_data *w83781d_data_if_isa(void);
246 static int w83781d_alias_detect(struct i2c_client *client, u8 chipid);
247
248 static int w83781d_read_value(struct w83781d_data *data, u16 reg);
249 static int w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value);
250 static struct w83781d_data *w83781d_update_device(struct device *dev);
251 static void w83781d_init_device(struct device *dev);
252
253 /* following are the sysfs callback functions */
254 #define show_in_reg(reg) \
255 static ssize_t show_##reg (struct device *dev, struct device_attribute *da, \
256                 char *buf) \
257 { \
258         struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
259         struct w83781d_data *data = w83781d_update_device(dev); \
260         return sprintf(buf, "%ld\n", \
261                        (long)IN_FROM_REG(data->reg[attr->index])); \
262 }
263 show_in_reg(in);
264 show_in_reg(in_min);
265 show_in_reg(in_max);
266
267 #define store_in_reg(REG, reg) \
268 static ssize_t store_in_##reg (struct device *dev, struct device_attribute \
269                 *da, const char *buf, size_t count) \
270 { \
271         struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
272         struct w83781d_data *data = dev_get_drvdata(dev); \
273         int nr = attr->index; \
274         u32 val; \
275          \
276         val = simple_strtoul(buf, NULL, 10); \
277          \
278         mutex_lock(&data->update_lock); \
279         data->in_##reg[nr] = IN_TO_REG(val); \
280         w83781d_write_value(data, W83781D_REG_IN_##REG(nr), data->in_##reg[nr]); \
281          \
282         mutex_unlock(&data->update_lock); \
283         return count; \
284 }
285 store_in_reg(MIN, min);
286 store_in_reg(MAX, max);
287
288 #define sysfs_in_offsets(offset) \
289 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
290                 show_in, NULL, offset); \
291 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
292                 show_in_min, store_in_min, offset); \
293 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
294                 show_in_max, store_in_max, offset)
295
296 sysfs_in_offsets(0);
297 sysfs_in_offsets(1);
298 sysfs_in_offsets(2);
299 sysfs_in_offsets(3);
300 sysfs_in_offsets(4);
301 sysfs_in_offsets(5);
302 sysfs_in_offsets(6);
303 sysfs_in_offsets(7);
304 sysfs_in_offsets(8);
305
306 #define show_fan_reg(reg) \
307 static ssize_t show_##reg (struct device *dev, struct device_attribute *da, \
308                 char *buf) \
309 { \
310         struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
311         struct w83781d_data *data = w83781d_update_device(dev); \
312         return sprintf(buf,"%ld\n", \
313                 FAN_FROM_REG(data->reg[attr->index], \
314                         DIV_FROM_REG(data->fan_div[attr->index]))); \
315 }
316 show_fan_reg(fan);
317 show_fan_reg(fan_min);
318
319 static ssize_t
320 store_fan_min(struct device *dev, struct device_attribute *da,
321                 const char *buf, size_t count)
322 {
323         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
324         struct w83781d_data *data = dev_get_drvdata(dev);
325         int nr = attr->index;
326         u32 val;
327
328         val = simple_strtoul(buf, NULL, 10);
329
330         mutex_lock(&data->update_lock);
331         data->fan_min[nr] =
332             FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
333         w83781d_write_value(data, W83781D_REG_FAN_MIN(nr),
334                             data->fan_min[nr]);
335
336         mutex_unlock(&data->update_lock);
337         return count;
338 }
339
340 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
341 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
342                 show_fan_min, store_fan_min, 0);
343 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
344 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
345                 show_fan_min, store_fan_min, 1);
346 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
347 static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO | S_IWUSR,
348                 show_fan_min, store_fan_min, 2);
349
350 #define show_temp_reg(reg) \
351 static ssize_t show_##reg (struct device *dev, struct device_attribute *da, \
352                 char *buf) \
353 { \
354         struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
355         struct w83781d_data *data = w83781d_update_device(dev); \
356         int nr = attr->index; \
357         if (nr >= 2) {  /* TEMP2 and TEMP3 */ \
358                 return sprintf(buf,"%d\n", \
359                         LM75_TEMP_FROM_REG(data->reg##_add[nr-2])); \
360         } else {        /* TEMP1 */ \
361                 return sprintf(buf,"%ld\n", (long)TEMP_FROM_REG(data->reg)); \
362         } \
363 }
364 show_temp_reg(temp);
365 show_temp_reg(temp_max);
366 show_temp_reg(temp_max_hyst);
367
368 #define store_temp_reg(REG, reg) \
369 static ssize_t store_temp_##reg (struct device *dev, \
370                 struct device_attribute *da, const char *buf, size_t count) \
371 { \
372         struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
373         struct w83781d_data *data = dev_get_drvdata(dev); \
374         int nr = attr->index; \
375         long val; \
376          \
377         val = simple_strtol(buf, NULL, 10); \
378          \
379         mutex_lock(&data->update_lock); \
380          \
381         if (nr >= 2) {  /* TEMP2 and TEMP3 */ \
382                 data->temp_##reg##_add[nr-2] = LM75_TEMP_TO_REG(val); \
383                 w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \
384                                 data->temp_##reg##_add[nr-2]); \
385         } else {        /* TEMP1 */ \
386                 data->temp_##reg = TEMP_TO_REG(val); \
387                 w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \
388                         data->temp_##reg); \
389         } \
390          \
391         mutex_unlock(&data->update_lock); \
392         return count; \
393 }
394 store_temp_reg(OVER, max);
395 store_temp_reg(HYST, max_hyst);
396
397 #define sysfs_temp_offsets(offset) \
398 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
399                 show_temp, NULL, offset); \
400 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
401                 show_temp_max, store_temp_max, offset); \
402 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
403                 show_temp_max_hyst, store_temp_max_hyst, offset);
404
405 sysfs_temp_offsets(1);
406 sysfs_temp_offsets(2);
407 sysfs_temp_offsets(3);
408
409 static ssize_t
410 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
411 {
412         struct w83781d_data *data = w83781d_update_device(dev);
413         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
414 }
415
416 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
417
418 static ssize_t
419 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
420 {
421         struct w83781d_data *data = dev_get_drvdata(dev);
422         return sprintf(buf, "%ld\n", (long) data->vrm);
423 }
424
425 static ssize_t
426 store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
427 {
428         struct w83781d_data *data = dev_get_drvdata(dev);
429         u32 val;
430
431         val = simple_strtoul(buf, NULL, 10);
432         data->vrm = val;
433
434         return count;
435 }
436
437 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
438
439 static ssize_t
440 show_alarms_reg(struct device *dev, struct device_attribute *attr, char *buf)
441 {
442         struct w83781d_data *data = w83781d_update_device(dev);
443         return sprintf(buf, "%u\n", data->alarms);
444 }
445
446 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
447
448 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
449                 char *buf)
450 {
451         struct w83781d_data *data = w83781d_update_device(dev);
452         int bitnr = to_sensor_dev_attr(attr)->index;
453         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
454 }
455
456 /* The W83781D has a single alarm bit for temp2 and temp3 */
457 static ssize_t show_temp3_alarm(struct device *dev,
458                 struct device_attribute *attr, char *buf)
459 {
460         struct w83781d_data *data = w83781d_update_device(dev);
461         int bitnr = (data->type == w83781d) ? 5 : 13;
462         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
463 }
464
465 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
466 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
467 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
468 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
469 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
470 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
471 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10);
472 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 16);
473 static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 17);
474 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
475 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
476 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11);
477 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
478 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
479 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_temp3_alarm, NULL, 0);
480
481 static ssize_t show_beep_mask (struct device *dev, struct device_attribute *attr, char *buf)
482 {
483         struct w83781d_data *data = w83781d_update_device(dev);
484         return sprintf(buf, "%ld\n",
485                        (long)BEEP_MASK_FROM_REG(data->beep_mask, data->type));
486 }
487
488 static ssize_t
489 store_beep_mask(struct device *dev, struct device_attribute *attr,
490                 const char *buf, size_t count)
491 {
492         struct w83781d_data *data = dev_get_drvdata(dev);
493         u32 val;
494
495         val = simple_strtoul(buf, NULL, 10);
496
497         mutex_lock(&data->update_lock);
498         data->beep_mask &= 0x8000; /* preserve beep enable */
499         data->beep_mask |= BEEP_MASK_TO_REG(val, data->type);
500         w83781d_write_value(data, W83781D_REG_BEEP_INTS1,
501                             data->beep_mask & 0xff);
502         w83781d_write_value(data, W83781D_REG_BEEP_INTS2,
503                             (data->beep_mask >> 8) & 0xff);
504         if (data->type != w83781d && data->type != as99127f) {
505                 w83781d_write_value(data, W83781D_REG_BEEP_INTS3,
506                                     ((data->beep_mask) >> 16) & 0xff);
507         }
508         mutex_unlock(&data->update_lock);
509
510         return count;
511 }
512
513 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
514                 show_beep_mask, store_beep_mask);
515
516 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
517                 char *buf)
518 {
519         struct w83781d_data *data = w83781d_update_device(dev);
520         int bitnr = to_sensor_dev_attr(attr)->index;
521         return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
522 }
523
524 static ssize_t
525 store_beep(struct device *dev, struct device_attribute *attr,
526                 const char *buf, size_t count)
527 {
528         struct w83781d_data *data = dev_get_drvdata(dev);
529         int bitnr = to_sensor_dev_attr(attr)->index;
530         unsigned long bit;
531         u8 reg;
532
533         bit = simple_strtoul(buf, NULL, 10);
534         if (bit & ~1)
535                 return -EINVAL;
536
537         mutex_lock(&data->update_lock);
538         if (bit)
539                 data->beep_mask |= (1 << bitnr);
540         else
541                 data->beep_mask &= ~(1 << bitnr);
542
543         if (bitnr < 8) {
544                 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS1);
545                 if (bit)
546                         reg |= (1 << bitnr);
547                 else
548                         reg &= ~(1 << bitnr);
549                 w83781d_write_value(data, W83781D_REG_BEEP_INTS1, reg);
550         } else if (bitnr < 16) {
551                 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS2);
552                 if (bit)
553                         reg |= (1 << (bitnr - 8));
554                 else
555                         reg &= ~(1 << (bitnr - 8));
556                 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, reg);
557         } else {
558                 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS3);
559                 if (bit)
560                         reg |= (1 << (bitnr - 16));
561                 else
562                         reg &= ~(1 << (bitnr - 16));
563                 w83781d_write_value(data, W83781D_REG_BEEP_INTS3, reg);
564         }
565         mutex_unlock(&data->update_lock);
566
567         return count;
568 }
569
570 /* The W83781D has a single beep bit for temp2 and temp3 */
571 static ssize_t show_temp3_beep(struct device *dev,
572                 struct device_attribute *attr, char *buf)
573 {
574         struct w83781d_data *data = w83781d_update_device(dev);
575         int bitnr = (data->type == w83781d) ? 5 : 13;
576         return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
577 }
578
579 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
580                         show_beep, store_beep, 0);
581 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR,
582                         show_beep, store_beep, 1);
583 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR,
584                         show_beep, store_beep, 2);
585 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR,
586                         show_beep, store_beep, 3);
587 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR,
588                         show_beep, store_beep, 8);
589 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO | S_IWUSR,
590                         show_beep, store_beep, 9);
591 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO | S_IWUSR,
592                         show_beep, store_beep, 10);
593 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO | S_IWUSR,
594                         show_beep, store_beep, 16);
595 static SENSOR_DEVICE_ATTR(in8_beep, S_IRUGO | S_IWUSR,
596                         show_beep, store_beep, 17);
597 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR,
598                         show_beep, store_beep, 6);
599 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR,
600                         show_beep, store_beep, 7);
601 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO | S_IWUSR,
602                         show_beep, store_beep, 11);
603 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
604                         show_beep, store_beep, 4);
605 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR,
606                         show_beep, store_beep, 5);
607 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO,
608                         show_temp3_beep, store_beep, 13);
609 static SENSOR_DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
610                         show_beep, store_beep, 15);
611
612 static ssize_t
613 show_fan_div(struct device *dev, struct device_attribute *da, char *buf)
614 {
615         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
616         struct w83781d_data *data = w83781d_update_device(dev);
617         return sprintf(buf, "%ld\n",
618                        (long) DIV_FROM_REG(data->fan_div[attr->index]));
619 }
620
621 /* Note: we save and restore the fan minimum here, because its value is
622    determined in part by the fan divisor.  This follows the principle of
623    least surprise; the user doesn't expect the fan minimum to change just
624    because the divisor changed. */
625 static ssize_t
626 store_fan_div(struct device *dev, struct device_attribute *da,
627                 const char *buf, size_t count)
628 {
629         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
630         struct w83781d_data *data = dev_get_drvdata(dev);
631         unsigned long min;
632         int nr = attr->index;
633         u8 reg;
634         unsigned long val = simple_strtoul(buf, NULL, 10);
635
636         mutex_lock(&data->update_lock);
637
638         /* Save fan_min */
639         min = FAN_FROM_REG(data->fan_min[nr],
640                            DIV_FROM_REG(data->fan_div[nr]));
641
642         data->fan_div[nr] = DIV_TO_REG(val, data->type);
643
644         reg = (w83781d_read_value(data, nr==2 ? W83781D_REG_PIN : W83781D_REG_VID_FANDIV)
645                & (nr==0 ? 0xcf : 0x3f))
646             | ((data->fan_div[nr] & 0x03) << (nr==0 ? 4 : 6));
647         w83781d_write_value(data, nr==2 ? W83781D_REG_PIN : W83781D_REG_VID_FANDIV, reg);
648
649         /* w83781d and as99127f don't have extended divisor bits */
650         if (data->type != w83781d && data->type != as99127f) {
651                 reg = (w83781d_read_value(data, W83781D_REG_VBAT)
652                        & ~(1 << (5 + nr)))
653                     | ((data->fan_div[nr] & 0x04) << (3 + nr));
654                 w83781d_write_value(data, W83781D_REG_VBAT, reg);
655         }
656
657         /* Restore fan_min */
658         data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
659         w83781d_write_value(data, W83781D_REG_FAN_MIN(nr), data->fan_min[nr]);
660
661         mutex_unlock(&data->update_lock);
662         return count;
663 }
664
665 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
666                 show_fan_div, store_fan_div, 0);
667 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
668                 show_fan_div, store_fan_div, 1);
669 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR,
670                 show_fan_div, store_fan_div, 2);
671
672 static ssize_t
673 show_pwm(struct device *dev, struct device_attribute *da, char *buf)
674 {
675         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
676         struct w83781d_data *data = w83781d_update_device(dev);
677         return sprintf(buf, "%d\n", (int)data->pwm[attr->index]);
678 }
679
680 static ssize_t
681 show_pwm2_enable(struct device *dev, struct device_attribute *da, char *buf)
682 {
683         struct w83781d_data *data = w83781d_update_device(dev);
684         return sprintf(buf, "%d\n", (int)data->pwm2_enable);
685 }
686
687 static ssize_t
688 store_pwm(struct device *dev, struct device_attribute *da, const char *buf,
689                 size_t count)
690 {
691         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
692         struct w83781d_data *data = dev_get_drvdata(dev);
693         int nr = attr->index;
694         u32 val;
695
696         val = simple_strtoul(buf, NULL, 10);
697
698         mutex_lock(&data->update_lock);
699         data->pwm[nr] = SENSORS_LIMIT(val, 0, 255);
700         w83781d_write_value(data, W83781D_REG_PWM[nr], data->pwm[nr]);
701         mutex_unlock(&data->update_lock);
702         return count;
703 }
704
705 static ssize_t
706 store_pwm2_enable(struct device *dev, struct device_attribute *da,
707                 const char *buf, size_t count)
708 {
709         struct w83781d_data *data = dev_get_drvdata(dev);
710         u32 val, reg;
711
712         val = simple_strtoul(buf, NULL, 10);
713
714         mutex_lock(&data->update_lock);
715
716         switch (val) {
717         case 0:
718         case 1:
719                 reg = w83781d_read_value(data, W83781D_REG_PWMCLK12);
720                 w83781d_write_value(data, W83781D_REG_PWMCLK12,
721                                     (reg & 0xf7) | (val << 3));
722
723                 reg = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
724                 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG,
725                                     (reg & 0xef) | (!val << 4));
726
727                 data->pwm2_enable = val;
728                 break;
729
730         default:
731                 mutex_unlock(&data->update_lock);
732                 return -EINVAL;
733         }
734
735         mutex_unlock(&data->update_lock);
736         return count;
737 }
738
739 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0);
740 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 1);
741 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 2);
742 static SENSOR_DEVICE_ATTR(pwm4, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 3);
743 /* only PWM2 can be enabled/disabled */
744 static DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR,
745                 show_pwm2_enable, store_pwm2_enable);
746
747 static ssize_t
748 show_sensor(struct device *dev, struct device_attribute *da, char *buf)
749 {
750         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
751         struct w83781d_data *data = w83781d_update_device(dev);
752         return sprintf(buf, "%d\n", (int)data->sens[attr->index]);
753 }
754
755 static ssize_t
756 store_sensor(struct device *dev, struct device_attribute *da,
757                 const char *buf, size_t count)
758 {
759         struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
760         struct w83781d_data *data = dev_get_drvdata(dev);
761         int nr = attr->index;
762         u32 val, tmp;
763
764         val = simple_strtoul(buf, NULL, 10);
765
766         mutex_lock(&data->update_lock);
767
768         switch (val) {
769         case 1:         /* PII/Celeron diode */
770                 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
771                 w83781d_write_value(data, W83781D_REG_SCFG1,
772                                     tmp | BIT_SCFG1[nr]);
773                 tmp = w83781d_read_value(data, W83781D_REG_SCFG2);
774                 w83781d_write_value(data, W83781D_REG_SCFG2,
775                                     tmp | BIT_SCFG2[nr]);
776                 data->sens[nr] = val;
777                 break;
778         case 2:         /* 3904 */
779                 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
780                 w83781d_write_value(data, W83781D_REG_SCFG1,
781                                     tmp | BIT_SCFG1[nr]);
782                 tmp = w83781d_read_value(data, W83781D_REG_SCFG2);
783                 w83781d_write_value(data, W83781D_REG_SCFG2,
784                                     tmp & ~BIT_SCFG2[nr]);
785                 data->sens[nr] = val;
786                 break;
787         case W83781D_DEFAULT_BETA:
788                 dev_warn(dev, "Sensor type %d is deprecated, please use 4 "
789                          "instead\n", W83781D_DEFAULT_BETA);
790                 /* fall through */
791         case 4:         /* thermistor */
792                 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
793                 w83781d_write_value(data, W83781D_REG_SCFG1,
794                                     tmp & ~BIT_SCFG1[nr]);
795                 data->sens[nr] = val;
796                 break;
797         default:
798                 dev_err(dev, "Invalid sensor type %ld; must be 1, 2, or 4\n",
799                        (long) val);
800                 break;
801         }
802
803         mutex_unlock(&data->update_lock);
804         return count;
805 }
806
807 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR,
808         show_sensor, store_sensor, 0);
809 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR,
810         show_sensor, store_sensor, 1);
811 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR,
812         show_sensor, store_sensor, 2);
813
814 /* Assumes that adapter is of I2C, not ISA variety.
815  * OTHERWISE DON'T CALL THIS
816  */
817 static int
818 w83781d_detect_subclients(struct i2c_client *new_client)
819 {
820         int i, val1 = 0, id;
821         int err;
822         int address = new_client->addr;
823         unsigned short sc_addr[2];
824         struct i2c_adapter *adapter = new_client->adapter;
825         struct w83781d_data *data = i2c_get_clientdata(new_client);
826         enum chips kind = data->type;
827
828         id = i2c_adapter_id(adapter);
829
830         if (force_subclients[0] == id && force_subclients[1] == address) {
831                 for (i = 2; i <= 3; i++) {
832                         if (force_subclients[i] < 0x48 ||
833                             force_subclients[i] > 0x4f) {
834                                 dev_err(&new_client->dev, "Invalid subclient "
835                                         "address %d; must be 0x48-0x4f\n",
836                                         force_subclients[i]);
837                                 err = -EINVAL;
838                                 goto ERROR_SC_1;
839                         }
840                 }
841                 w83781d_write_value(data, W83781D_REG_I2C_SUBADDR,
842                                 (force_subclients[2] & 0x07) |
843                                 ((force_subclients[3] & 0x07) << 4));
844                 sc_addr[0] = force_subclients[2];
845         } else {
846                 val1 = w83781d_read_value(data, W83781D_REG_I2C_SUBADDR);
847                 sc_addr[0] = 0x48 + (val1 & 0x07);
848         }
849
850         if (kind != w83783s) {
851                 if (force_subclients[0] == id &&
852                     force_subclients[1] == address) {
853                         sc_addr[1] = force_subclients[3];
854                 } else {
855                         sc_addr[1] = 0x48 + ((val1 >> 4) & 0x07);
856                 }
857                 if (sc_addr[0] == sc_addr[1]) {
858                         dev_err(&new_client->dev,
859                                "Duplicate addresses 0x%x for subclients.\n",
860                                sc_addr[0]);
861                         err = -EBUSY;
862                         goto ERROR_SC_2;
863                 }
864         }
865
866         for (i = 0; i <= 1; i++) {
867                 data->lm75[i] = i2c_new_dummy(adapter, sc_addr[i]);
868                 if (!data->lm75[i]) {
869                         dev_err(&new_client->dev, "Subclient %d "
870                                 "registration at address 0x%x "
871                                 "failed.\n", i, sc_addr[i]);
872                         err = -ENOMEM;
873                         if (i == 1)
874                                 goto ERROR_SC_3;
875                         goto ERROR_SC_2;
876                 }
877                 if (kind == w83783s)
878                         break;
879         }
880
881         return 0;
882
883 /* Undo inits in case of errors */
884 ERROR_SC_3:
885         i2c_unregister_device(data->lm75[0]);
886 ERROR_SC_2:
887 ERROR_SC_1:
888         return err;
889 }
890
891 #define IN_UNIT_ATTRS(X)                                        \
892         &sensor_dev_attr_in##X##_input.dev_attr.attr,           \
893         &sensor_dev_attr_in##X##_min.dev_attr.attr,             \
894         &sensor_dev_attr_in##X##_max.dev_attr.attr,             \
895         &sensor_dev_attr_in##X##_alarm.dev_attr.attr,           \
896         &sensor_dev_attr_in##X##_beep.dev_attr.attr
897
898 #define FAN_UNIT_ATTRS(X)                                       \
899         &sensor_dev_attr_fan##X##_input.dev_attr.attr,          \
900         &sensor_dev_attr_fan##X##_min.dev_attr.attr,            \
901         &sensor_dev_attr_fan##X##_div.dev_attr.attr,            \
902         &sensor_dev_attr_fan##X##_alarm.dev_attr.attr,          \
903         &sensor_dev_attr_fan##X##_beep.dev_attr.attr
904
905 #define TEMP_UNIT_ATTRS(X)                                      \
906         &sensor_dev_attr_temp##X##_input.dev_attr.attr,         \
907         &sensor_dev_attr_temp##X##_max.dev_attr.attr,           \
908         &sensor_dev_attr_temp##X##_max_hyst.dev_attr.attr,      \
909         &sensor_dev_attr_temp##X##_alarm.dev_attr.attr,         \
910         &sensor_dev_attr_temp##X##_beep.dev_attr.attr
911
912 static struct attribute* w83781d_attributes[] = {
913         IN_UNIT_ATTRS(0),
914         IN_UNIT_ATTRS(2),
915         IN_UNIT_ATTRS(3),
916         IN_UNIT_ATTRS(4),
917         IN_UNIT_ATTRS(5),
918         IN_UNIT_ATTRS(6),
919         FAN_UNIT_ATTRS(1),
920         FAN_UNIT_ATTRS(2),
921         FAN_UNIT_ATTRS(3),
922         TEMP_UNIT_ATTRS(1),
923         TEMP_UNIT_ATTRS(2),
924         &dev_attr_cpu0_vid.attr,
925         &dev_attr_vrm.attr,
926         &dev_attr_alarms.attr,
927         &dev_attr_beep_mask.attr,
928         &sensor_dev_attr_beep_enable.dev_attr.attr,
929         NULL
930 };
931 static const struct attribute_group w83781d_group = {
932         .attrs = w83781d_attributes,
933 };
934
935 static struct attribute *w83781d_attributes_opt[] = {
936         IN_UNIT_ATTRS(1),
937         IN_UNIT_ATTRS(7),
938         IN_UNIT_ATTRS(8),
939         TEMP_UNIT_ATTRS(3),
940         &sensor_dev_attr_pwm1.dev_attr.attr,
941         &sensor_dev_attr_pwm2.dev_attr.attr,
942         &sensor_dev_attr_pwm3.dev_attr.attr,
943         &sensor_dev_attr_pwm4.dev_attr.attr,
944         &dev_attr_pwm2_enable.attr,
945         &sensor_dev_attr_temp1_type.dev_attr.attr,
946         &sensor_dev_attr_temp2_type.dev_attr.attr,
947         &sensor_dev_attr_temp3_type.dev_attr.attr,
948         NULL
949 };
950 static const struct attribute_group w83781d_group_opt = {
951         .attrs = w83781d_attributes_opt,
952 };
953
954 /* No clean up is done on error, it's up to the caller */
955 static int
956 w83781d_create_files(struct device *dev, int kind, int is_isa)
957 {
958         int err;
959
960         if ((err = sysfs_create_group(&dev->kobj, &w83781d_group)))
961                 return err;
962
963         if (kind != w83783s) {
964                 if ((err = device_create_file(dev,
965                                 &sensor_dev_attr_in1_input.dev_attr))
966                     || (err = device_create_file(dev,
967                                 &sensor_dev_attr_in1_min.dev_attr))
968                     || (err = device_create_file(dev,
969                                 &sensor_dev_attr_in1_max.dev_attr))
970                     || (err = device_create_file(dev,
971                                 &sensor_dev_attr_in1_alarm.dev_attr))
972                     || (err = device_create_file(dev,
973                                 &sensor_dev_attr_in1_beep.dev_attr)))
974                         return err;
975         }
976         if (kind != as99127f && kind != w83781d && kind != w83783s) {
977                 if ((err = device_create_file(dev,
978                                 &sensor_dev_attr_in7_input.dev_attr))
979                     || (err = device_create_file(dev,
980                                 &sensor_dev_attr_in7_min.dev_attr))
981                     || (err = device_create_file(dev,
982                                 &sensor_dev_attr_in7_max.dev_attr))
983                     || (err = device_create_file(dev,
984                                 &sensor_dev_attr_in7_alarm.dev_attr))
985                     || (err = device_create_file(dev,
986                                 &sensor_dev_attr_in7_beep.dev_attr))
987                     || (err = device_create_file(dev,
988                                 &sensor_dev_attr_in8_input.dev_attr))
989                     || (err = device_create_file(dev,
990                                 &sensor_dev_attr_in8_min.dev_attr))
991                     || (err = device_create_file(dev,
992                                 &sensor_dev_attr_in8_max.dev_attr))
993                     || (err = device_create_file(dev,
994                                 &sensor_dev_attr_in8_alarm.dev_attr))
995                     || (err = device_create_file(dev,
996                                 &sensor_dev_attr_in8_beep.dev_attr)))
997                         return err;
998         }
999         if (kind != w83783s) {
1000                 if ((err = device_create_file(dev,
1001                                 &sensor_dev_attr_temp3_input.dev_attr))
1002                     || (err = device_create_file(dev,
1003                                 &sensor_dev_attr_temp3_max.dev_attr))
1004                     || (err = device_create_file(dev,
1005                                 &sensor_dev_attr_temp3_max_hyst.dev_attr))
1006                     || (err = device_create_file(dev,
1007                                 &sensor_dev_attr_temp3_alarm.dev_attr))
1008                     || (err = device_create_file(dev,
1009                                 &sensor_dev_attr_temp3_beep.dev_attr)))
1010                         return err;
1011
1012                 if (kind != w83781d) {
1013                         err = sysfs_chmod_file(&dev->kobj,
1014                                 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1015                                 S_IRUGO | S_IWUSR);
1016                         if (err)
1017                                 return err;
1018                 }
1019         }
1020
1021         if (kind != w83781d && kind != as99127f) {
1022                 if ((err = device_create_file(dev,
1023                                 &sensor_dev_attr_pwm1.dev_attr))
1024                     || (err = device_create_file(dev,
1025                                 &sensor_dev_attr_pwm2.dev_attr))
1026                     || (err = device_create_file(dev, &dev_attr_pwm2_enable)))
1027                         return err;
1028         }
1029         if (kind == w83782d && !is_isa) {
1030                 if ((err = device_create_file(dev,
1031                                 &sensor_dev_attr_pwm3.dev_attr))
1032                     || (err = device_create_file(dev,
1033                                 &sensor_dev_attr_pwm4.dev_attr)))
1034                         return err;
1035         }
1036
1037         if (kind != as99127f && kind != w83781d) {
1038                 if ((err = device_create_file(dev,
1039                                 &sensor_dev_attr_temp1_type.dev_attr))
1040                     || (err = device_create_file(dev,
1041                                 &sensor_dev_attr_temp2_type.dev_attr)))
1042                         return err;
1043                 if (kind != w83783s) {
1044                         if ((err = device_create_file(dev,
1045                                         &sensor_dev_attr_temp3_type.dev_attr)))
1046                                 return err;
1047                 }
1048         }
1049
1050         return 0;
1051 }
1052
1053 /* Return 0 if detection is successful, -ENODEV otherwise */
1054 static int
1055 w83781d_detect(struct i2c_client *client, struct i2c_board_info *info)
1056 {
1057         int val1, val2;
1058         struct w83781d_data *isa = w83781d_data_if_isa();
1059         struct i2c_adapter *adapter = client->adapter;
1060         int address = client->addr;
1061         const char *client_name;
1062         enum vendor { winbond, asus } vendid;
1063
1064         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1065                 return -ENODEV;
1066
1067         /* We block updates of the ISA device to minimize the risk of
1068            concurrent access to the same W83781D chip through different
1069            interfaces. */
1070         if (isa)
1071                 mutex_lock(&isa->update_lock);
1072
1073         if (i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG) & 0x80) {
1074                 dev_dbg(&adapter->dev,
1075                         "Detection of w83781d chip failed at step 3\n");
1076                 goto err_nodev;
1077         }
1078
1079         val1 = i2c_smbus_read_byte_data(client, W83781D_REG_BANK);
1080         val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
1081         /* Check for Winbond or Asus ID if in bank 0 */
1082         if (!(val1 & 0x07) &&
1083             ((!(val1 & 0x80) && val2 != 0xa3 && val2 != 0xc3) ||
1084              ( (val1 & 0x80) && val2 != 0x5c && val2 != 0x12))) {
1085                 dev_dbg(&adapter->dev,
1086                         "Detection of w83781d chip failed at step 4\n");
1087                 goto err_nodev;
1088         }
1089         /* If Winbond SMBus, check address at 0x48.
1090            Asus doesn't support, except for as99127f rev.2 */
1091         if ((!(val1 & 0x80) && val2 == 0xa3) ||
1092             ( (val1 & 0x80) && val2 == 0x5c)) {
1093                 if (i2c_smbus_read_byte_data(client, W83781D_REG_I2C_ADDR)
1094                     != address) {
1095                         dev_dbg(&adapter->dev,
1096                                 "Detection of w83781d chip failed at step 5\n");
1097                         goto err_nodev;
1098                 }
1099         }
1100
1101         /* Put it now into bank 0 and Vendor ID High Byte */
1102         i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1103                 (i2c_smbus_read_byte_data(client, W83781D_REG_BANK)
1104                  & 0x78) | 0x80);
1105
1106         /* Get the vendor ID */
1107         val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
1108         if (val2 == 0x5c)
1109                 vendid = winbond;
1110         else if (val2 == 0x12)
1111                 vendid = asus;
1112         else {
1113                 dev_dbg(&adapter->dev,
1114                         "w83781d chip vendor is neither Winbond nor Asus\n");
1115                 goto err_nodev;
1116         }
1117
1118         /* Determine the chip type. */
1119         val1 = i2c_smbus_read_byte_data(client, W83781D_REG_WCHIPID);
1120         if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond)
1121                 client_name = "w83781d";
1122         else if (val1 == 0x30 && vendid == winbond)
1123                 client_name = "w83782d";
1124         else if (val1 == 0x40 && vendid == winbond && address == 0x2d)
1125                 client_name = "w83783s";
1126         else if (val1 == 0x31)
1127                 client_name = "as99127f";
1128         else
1129                 goto err_nodev;
1130
1131         if (val1 <= 0x30 && w83781d_alias_detect(client, val1)) {
1132                 dev_dbg(&adapter->dev, "Device at 0x%02x appears to "
1133                         "be the same as ISA device\n", address);
1134                 goto err_nodev;
1135         }
1136
1137         if (isa)
1138                 mutex_unlock(&isa->update_lock);
1139
1140         strlcpy(info->type, client_name, I2C_NAME_SIZE);
1141
1142         return 0;
1143
1144  err_nodev:
1145         if (isa)
1146                 mutex_unlock(&isa->update_lock);
1147         return -ENODEV;
1148 }
1149
1150 static int
1151 w83781d_probe(struct i2c_client *client, const struct i2c_device_id *id)
1152 {
1153         struct device *dev = &client->dev;
1154         struct w83781d_data *data;
1155         int err;
1156
1157         data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL);
1158         if (!data) {
1159                 err = -ENOMEM;
1160                 goto ERROR1;
1161         }
1162
1163         i2c_set_clientdata(client, data);
1164         mutex_init(&data->lock);
1165         mutex_init(&data->update_lock);
1166
1167         data->type = id->driver_data;
1168         data->client = client;
1169
1170         /* attach secondary i2c lm75-like clients */
1171         err = w83781d_detect_subclients(client);
1172         if (err)
1173                 goto ERROR3;
1174
1175         /* Initialize the chip */
1176         w83781d_init_device(dev);
1177
1178         /* Register sysfs hooks */
1179         err = w83781d_create_files(dev, data->type, 0);
1180         if (err)
1181                 goto ERROR4;
1182
1183         data->hwmon_dev = hwmon_device_register(dev);
1184         if (IS_ERR(data->hwmon_dev)) {
1185                 err = PTR_ERR(data->hwmon_dev);
1186                 goto ERROR4;
1187         }
1188
1189         return 0;
1190
1191 ERROR4:
1192         sysfs_remove_group(&dev->kobj, &w83781d_group);
1193         sysfs_remove_group(&dev->kobj, &w83781d_group_opt);
1194
1195         if (data->lm75[0])
1196                 i2c_unregister_device(data->lm75[0]);
1197         if (data->lm75[1])
1198                 i2c_unregister_device(data->lm75[1]);
1199 ERROR3:
1200         i2c_set_clientdata(client, NULL);
1201         kfree(data);
1202 ERROR1:
1203         return err;
1204 }
1205
1206 static int
1207 w83781d_remove(struct i2c_client *client)
1208 {
1209         struct w83781d_data *data = i2c_get_clientdata(client);
1210         struct device *dev = &client->dev;
1211
1212         hwmon_device_unregister(data->hwmon_dev);
1213
1214         sysfs_remove_group(&dev->kobj, &w83781d_group);
1215         sysfs_remove_group(&dev->kobj, &w83781d_group_opt);
1216
1217         if (data->lm75[0])
1218                 i2c_unregister_device(data->lm75[0]);
1219         if (data->lm75[1])
1220                 i2c_unregister_device(data->lm75[1]);
1221
1222         i2c_set_clientdata(client, NULL);
1223         kfree(data);
1224
1225         return 0;
1226 }
1227
1228 static int
1229 w83781d_read_value_i2c(struct w83781d_data *data, u16 reg)
1230 {
1231         struct i2c_client *client = data->client;
1232         int res, bank;
1233         struct i2c_client *cl;
1234
1235         bank = (reg >> 8) & 0x0f;
1236         if (bank > 2)
1237                 /* switch banks */
1238                 i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1239                                           bank);
1240         if (bank == 0 || bank > 2) {
1241                 res = i2c_smbus_read_byte_data(client, reg & 0xff);
1242         } else {
1243                 /* switch to subclient */
1244                 cl = data->lm75[bank - 1];
1245                 /* convert from ISA to LM75 I2C addresses */
1246                 switch (reg & 0xff) {
1247                 case 0x50:      /* TEMP */
1248                         res = swab16(i2c_smbus_read_word_data(cl, 0));
1249                         break;
1250                 case 0x52:      /* CONFIG */
1251                         res = i2c_smbus_read_byte_data(cl, 1);
1252                         break;
1253                 case 0x53:      /* HYST */
1254                         res = swab16(i2c_smbus_read_word_data(cl, 2));
1255                         break;
1256                 case 0x55:      /* OVER */
1257                 default:
1258                         res = swab16(i2c_smbus_read_word_data(cl, 3));
1259                         break;
1260                 }
1261         }
1262         if (bank > 2)
1263                 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1264
1265         return res;
1266 }
1267
1268 static int
1269 w83781d_write_value_i2c(struct w83781d_data *data, u16 reg, u16 value)
1270 {
1271         struct i2c_client *client = data->client;
1272         int bank;
1273         struct i2c_client *cl;
1274
1275         bank = (reg >> 8) & 0x0f;
1276         if (bank > 2)
1277                 /* switch banks */
1278                 i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1279                                           bank);
1280         if (bank == 0 || bank > 2) {
1281                 i2c_smbus_write_byte_data(client, reg & 0xff,
1282                                           value & 0xff);
1283         } else {
1284                 /* switch to subclient */
1285                 cl = data->lm75[bank - 1];
1286                 /* convert from ISA to LM75 I2C addresses */
1287                 switch (reg & 0xff) {
1288                 case 0x52:      /* CONFIG */
1289                         i2c_smbus_write_byte_data(cl, 1, value & 0xff);
1290                         break;
1291                 case 0x53:      /* HYST */
1292                         i2c_smbus_write_word_data(cl, 2, swab16(value));
1293                         break;
1294                 case 0x55:      /* OVER */
1295                         i2c_smbus_write_word_data(cl, 3, swab16(value));
1296                         break;
1297                 }
1298         }
1299         if (bank > 2)
1300                 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1301
1302         return 0;
1303 }
1304
1305 static void
1306 w83781d_init_device(struct device *dev)
1307 {
1308         struct w83781d_data *data = dev_get_drvdata(dev);
1309         int i, p;
1310         int type = data->type;
1311         u8 tmp;
1312
1313         if (reset && type != as99127f) { /* this resets registers we don't have
1314                                            documentation for on the as99127f */
1315                 /* Resetting the chip has been the default for a long time,
1316                    but it causes the BIOS initializations (fan clock dividers,
1317                    thermal sensor types...) to be lost, so it is now optional.
1318                    It might even go away if nobody reports it as being useful,
1319                    as I see very little reason why this would be needed at
1320                    all. */
1321                 dev_info(dev, "If reset=1 solved a problem you were "
1322                          "having, please report!\n");
1323
1324                 /* save these registers */
1325                 i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
1326                 p = w83781d_read_value(data, W83781D_REG_PWMCLK12);
1327                 /* Reset all except Watchdog values and last conversion values
1328                    This sets fan-divs to 2, among others */
1329                 w83781d_write_value(data, W83781D_REG_CONFIG, 0x80);
1330                 /* Restore the registers and disable power-on abnormal beep.
1331                    This saves FAN 1/2/3 input/output values set by BIOS. */
1332                 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80);
1333                 w83781d_write_value(data, W83781D_REG_PWMCLK12, p);
1334                 /* Disable master beep-enable (reset turns it on).
1335                    Individual beep_mask should be reset to off but for some reason
1336                    disabling this bit helps some people not get beeped */
1337                 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, 0);
1338         }
1339
1340         /* Disable power-on abnormal beep, as advised by the datasheet.
1341            Already done if reset=1. */
1342         if (init && !reset && type != as99127f) {
1343                 i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
1344                 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80);
1345         }
1346
1347         data->vrm = vid_which_vrm();
1348
1349         if ((type != w83781d) && (type != as99127f)) {
1350                 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
1351                 for (i = 1; i <= 3; i++) {
1352                         if (!(tmp & BIT_SCFG1[i - 1])) {
1353                                 data->sens[i - 1] = 4;
1354                         } else {
1355                                 if (w83781d_read_value
1356                                     (data,
1357                                      W83781D_REG_SCFG2) & BIT_SCFG2[i - 1])
1358                                         data->sens[i - 1] = 1;
1359                                 else
1360                                         data->sens[i - 1] = 2;
1361                         }
1362                         if (type == w83783s && i == 2)
1363                                 break;
1364                 }
1365         }
1366
1367         if (init && type != as99127f) {
1368                 /* Enable temp2 */
1369                 tmp = w83781d_read_value(data, W83781D_REG_TEMP2_CONFIG);
1370                 if (tmp & 0x01) {
1371                         dev_warn(dev, "Enabling temp2, readings "
1372                                  "might not make sense\n");
1373                         w83781d_write_value(data, W83781D_REG_TEMP2_CONFIG,
1374                                 tmp & 0xfe);
1375                 }
1376
1377                 /* Enable temp3 */
1378                 if (type != w83783s) {
1379                         tmp = w83781d_read_value(data,
1380                                 W83781D_REG_TEMP3_CONFIG);
1381                         if (tmp & 0x01) {
1382                                 dev_warn(dev, "Enabling temp3, "
1383                                          "readings might not make sense\n");
1384                                 w83781d_write_value(data,
1385                                         W83781D_REG_TEMP3_CONFIG, tmp & 0xfe);
1386                         }
1387                 }
1388         }
1389
1390         /* Start monitoring */
1391         w83781d_write_value(data, W83781D_REG_CONFIG,
1392                             (w83781d_read_value(data,
1393                                                 W83781D_REG_CONFIG) & 0xf7)
1394                             | 0x01);
1395
1396         /* A few vars need to be filled upon startup */
1397         for (i = 0; i < 3; i++) {
1398                 data->fan_min[i] = w83781d_read_value(data,
1399                                         W83781D_REG_FAN_MIN(i));
1400         }
1401
1402         mutex_init(&data->update_lock);
1403 }
1404
1405 static struct w83781d_data *w83781d_update_device(struct device *dev)
1406 {
1407         struct w83781d_data *data = dev_get_drvdata(dev);
1408         struct i2c_client *client = data->client;
1409         int i;
1410
1411         mutex_lock(&data->update_lock);
1412
1413         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1414             || !data->valid) {
1415                 dev_dbg(dev, "Starting device update\n");
1416
1417                 for (i = 0; i <= 8; i++) {
1418                         if (data->type == w83783s && i == 1)
1419                                 continue;       /* 783S has no in1 */
1420                         data->in[i] =
1421                             w83781d_read_value(data, W83781D_REG_IN(i));
1422                         data->in_min[i] =
1423                             w83781d_read_value(data, W83781D_REG_IN_MIN(i));
1424                         data->in_max[i] =
1425                             w83781d_read_value(data, W83781D_REG_IN_MAX(i));
1426                         if ((data->type != w83782d) && (i == 6))
1427                                 break;
1428                 }
1429                 for (i = 0; i < 3; i++) {
1430                         data->fan[i] =
1431                             w83781d_read_value(data, W83781D_REG_FAN(i));
1432                         data->fan_min[i] =
1433                             w83781d_read_value(data, W83781D_REG_FAN_MIN(i));
1434                 }
1435                 if (data->type != w83781d && data->type != as99127f) {
1436                         for (i = 0; i < 4; i++) {
1437                                 data->pwm[i] =
1438                                     w83781d_read_value(data,
1439                                                        W83781D_REG_PWM[i]);
1440                                 /* Only W83782D on SMBus has PWM3 and PWM4 */
1441                                 if ((data->type != w83782d || !client)
1442                                     && i == 1)
1443                                         break;
1444                         }
1445                         /* Only PWM2 can be disabled */
1446                         data->pwm2_enable = (w83781d_read_value(data,
1447                                               W83781D_REG_PWMCLK12) & 0x08) >> 3;
1448                 }
1449
1450                 data->temp = w83781d_read_value(data, W83781D_REG_TEMP(1));
1451                 data->temp_max =
1452                     w83781d_read_value(data, W83781D_REG_TEMP_OVER(1));
1453                 data->temp_max_hyst =
1454                     w83781d_read_value(data, W83781D_REG_TEMP_HYST(1));
1455                 data->temp_add[0] =
1456                     w83781d_read_value(data, W83781D_REG_TEMP(2));
1457                 data->temp_max_add[0] =
1458                     w83781d_read_value(data, W83781D_REG_TEMP_OVER(2));
1459                 data->temp_max_hyst_add[0] =
1460                     w83781d_read_value(data, W83781D_REG_TEMP_HYST(2));
1461                 if (data->type != w83783s) {
1462                         data->temp_add[1] =
1463                             w83781d_read_value(data, W83781D_REG_TEMP(3));
1464                         data->temp_max_add[1] =
1465                             w83781d_read_value(data,
1466                                                W83781D_REG_TEMP_OVER(3));
1467                         data->temp_max_hyst_add[1] =
1468                             w83781d_read_value(data,
1469                                                W83781D_REG_TEMP_HYST(3));
1470                 }
1471                 i = w83781d_read_value(data, W83781D_REG_VID_FANDIV);
1472                 data->vid = i & 0x0f;
1473                 data->vid |= (w83781d_read_value(data,
1474                                         W83781D_REG_CHIPID) & 0x01) << 4;
1475                 data->fan_div[0] = (i >> 4) & 0x03;
1476                 data->fan_div[1] = (i >> 6) & 0x03;
1477                 data->fan_div[2] = (w83781d_read_value(data,
1478                                         W83781D_REG_PIN) >> 6) & 0x03;
1479                 if ((data->type != w83781d) && (data->type != as99127f)) {
1480                         i = w83781d_read_value(data, W83781D_REG_VBAT);
1481                         data->fan_div[0] |= (i >> 3) & 0x04;
1482                         data->fan_div[1] |= (i >> 4) & 0x04;
1483                         data->fan_div[2] |= (i >> 5) & 0x04;
1484                 }
1485                 if (data->type == w83782d) {
1486                         data->alarms = w83781d_read_value(data,
1487                                                 W83782D_REG_ALARM1)
1488                                      | (w83781d_read_value(data,
1489                                                 W83782D_REG_ALARM2) << 8)
1490                                      | (w83781d_read_value(data,
1491                                                 W83782D_REG_ALARM3) << 16);
1492                 } else if (data->type == w83783s) {
1493                         data->alarms = w83781d_read_value(data,
1494                                                 W83782D_REG_ALARM1)
1495                                      | (w83781d_read_value(data,
1496                                                 W83782D_REG_ALARM2) << 8);
1497                 } else {
1498                         /* No real-time status registers, fall back to
1499                            interrupt status registers */
1500                         data->alarms = w83781d_read_value(data,
1501                                                 W83781D_REG_ALARM1)
1502                                      | (w83781d_read_value(data,
1503                                                 W83781D_REG_ALARM2) << 8);
1504                 }
1505                 i = w83781d_read_value(data, W83781D_REG_BEEP_INTS2);
1506                 data->beep_mask = (i << 8) +
1507                     w83781d_read_value(data, W83781D_REG_BEEP_INTS1);
1508                 if ((data->type != w83781d) && (data->type != as99127f)) {
1509                         data->beep_mask |=
1510                             w83781d_read_value(data,
1511                                                W83781D_REG_BEEP_INTS3) << 16;
1512                 }
1513                 data->last_updated = jiffies;
1514                 data->valid = 1;
1515         }
1516
1517         mutex_unlock(&data->update_lock);
1518
1519         return data;
1520 }
1521
1522 static const struct i2c_device_id w83781d_ids[] = {
1523         { "w83781d", w83781d, },
1524         { "w83782d", w83782d, },
1525         { "w83783s", w83783s, },
1526         { "as99127f", as99127f },
1527         { /* LIST END */ }
1528 };
1529 MODULE_DEVICE_TABLE(i2c, w83781d_ids);
1530
1531 static struct i2c_driver w83781d_driver = {
1532         .class          = I2C_CLASS_HWMON,
1533         .driver = {
1534                 .name = "w83781d",
1535         },
1536         .probe          = w83781d_probe,
1537         .remove         = w83781d_remove,
1538         .id_table       = w83781d_ids,
1539         .detect         = w83781d_detect,
1540         .address_list   = normal_i2c,
1541 };
1542
1543 /*
1544  * ISA related code
1545  */
1546 #ifdef CONFIG_ISA
1547
1548 /* ISA device, if found */
1549 static struct platform_device *pdev;
1550
1551 static unsigned short isa_address = 0x290;
1552
1553 /* I2C devices get this name attribute automatically, but for ISA devices
1554    we must create it by ourselves. */
1555 static ssize_t
1556 show_name(struct device *dev, struct device_attribute *devattr, char *buf)
1557 {
1558         struct w83781d_data *data = dev_get_drvdata(dev);
1559         return sprintf(buf, "%s\n", data->name);
1560 }
1561 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1562
1563 static struct w83781d_data *w83781d_data_if_isa(void)
1564 {
1565         return pdev ? platform_get_drvdata(pdev) : NULL;
1566 }
1567
1568 /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */
1569 static int w83781d_alias_detect(struct i2c_client *client, u8 chipid)
1570 {
1571         struct w83781d_data *isa;
1572         int i;
1573
1574         if (!pdev)      /* No ISA chip */
1575                 return 0;
1576
1577         isa = platform_get_drvdata(pdev);
1578
1579         if (w83781d_read_value(isa, W83781D_REG_I2C_ADDR) != client->addr)
1580                 return 0;       /* Address doesn't match */
1581         if (w83781d_read_value(isa, W83781D_REG_WCHIPID) != chipid)
1582                 return 0;       /* Chip type doesn't match */
1583
1584         /* We compare all the limit registers, the config register and the
1585          * interrupt mask registers */
1586         for (i = 0x2b; i <= 0x3d; i++) {
1587                 if (w83781d_read_value(isa, i) !=
1588                     i2c_smbus_read_byte_data(client, i))
1589                         return 0;
1590         }
1591         if (w83781d_read_value(isa, W83781D_REG_CONFIG) !=
1592             i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG))
1593                 return 0;
1594         for (i = 0x43; i <= 0x46; i++) {
1595                 if (w83781d_read_value(isa, i) !=
1596                     i2c_smbus_read_byte_data(client, i))
1597                         return 0;
1598         }
1599
1600         return 1;
1601 }
1602
1603 static int
1604 w83781d_read_value_isa(struct w83781d_data *data, u16 reg)
1605 {
1606         int word_sized, res;
1607
1608         word_sized = (((reg & 0xff00) == 0x100)
1609                       || ((reg & 0xff00) == 0x200))
1610             && (((reg & 0x00ff) == 0x50)
1611                 || ((reg & 0x00ff) == 0x53)
1612                 || ((reg & 0x00ff) == 0x55));
1613         if (reg & 0xff00) {
1614                 outb_p(W83781D_REG_BANK,
1615                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1616                 outb_p(reg >> 8,
1617                        data->isa_addr + W83781D_DATA_REG_OFFSET);
1618         }
1619         outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET);
1620         res = inb_p(data->isa_addr + W83781D_DATA_REG_OFFSET);
1621         if (word_sized) {
1622                 outb_p((reg & 0xff) + 1,
1623                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1624                 res =
1625                     (res << 8) + inb_p(data->isa_addr +
1626                                        W83781D_DATA_REG_OFFSET);
1627         }
1628         if (reg & 0xff00) {
1629                 outb_p(W83781D_REG_BANK,
1630                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1631                 outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET);
1632         }
1633         return res;
1634 }
1635
1636 static void
1637 w83781d_write_value_isa(struct w83781d_data *data, u16 reg, u16 value)
1638 {
1639         int word_sized;
1640
1641         word_sized = (((reg & 0xff00) == 0x100)
1642                       || ((reg & 0xff00) == 0x200))
1643             && (((reg & 0x00ff) == 0x53)
1644                 || ((reg & 0x00ff) == 0x55));
1645         if (reg & 0xff00) {
1646                 outb_p(W83781D_REG_BANK,
1647                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1648                 outb_p(reg >> 8,
1649                        data->isa_addr + W83781D_DATA_REG_OFFSET);
1650         }
1651         outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET);
1652         if (word_sized) {
1653                 outb_p(value >> 8,
1654                        data->isa_addr + W83781D_DATA_REG_OFFSET);
1655                 outb_p((reg & 0xff) + 1,
1656                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1657         }
1658         outb_p(value & 0xff, data->isa_addr + W83781D_DATA_REG_OFFSET);
1659         if (reg & 0xff00) {
1660                 outb_p(W83781D_REG_BANK,
1661                        data->isa_addr + W83781D_ADDR_REG_OFFSET);
1662                 outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET);
1663         }
1664 }
1665
1666 /* The SMBus locks itself, usually, but nothing may access the Winbond between
1667    bank switches. ISA access must always be locked explicitly!
1668    We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks,
1669    would slow down the W83781D access and should not be necessary.
1670    There are some ugly typecasts here, but the good news is - they should
1671    nowhere else be necessary! */
1672 static int
1673 w83781d_read_value(struct w83781d_data *data, u16 reg)
1674 {
1675         struct i2c_client *client = data->client;
1676         int res;
1677
1678         mutex_lock(&data->lock);
1679         if (client)
1680                 res = w83781d_read_value_i2c(data, reg);
1681         else
1682                 res = w83781d_read_value_isa(data, reg);
1683         mutex_unlock(&data->lock);
1684         return res;
1685 }
1686
1687 static int
1688 w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
1689 {
1690         struct i2c_client *client = data->client;
1691
1692         mutex_lock(&data->lock);
1693         if (client)
1694                 w83781d_write_value_i2c(data, reg, value);
1695         else
1696                 w83781d_write_value_isa(data, reg, value);
1697         mutex_unlock(&data->lock);
1698         return 0;
1699 }
1700
1701 static int __devinit
1702 w83781d_isa_probe(struct platform_device *pdev)
1703 {
1704         int err, reg;
1705         struct w83781d_data *data;
1706         struct resource *res;
1707
1708         /* Reserve the ISA region */
1709         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1710         if (!request_region(res->start + W83781D_ADDR_REG_OFFSET, 2,
1711                             "w83781d")) {
1712                 err = -EBUSY;
1713                 goto exit;
1714         }
1715
1716         data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL);
1717         if (!data) {
1718                 err = -ENOMEM;
1719                 goto exit_release_region;
1720         }
1721         mutex_init(&data->lock);
1722         data->isa_addr = res->start;
1723         platform_set_drvdata(pdev, data);
1724
1725         reg = w83781d_read_value(data, W83781D_REG_WCHIPID);
1726         switch (reg) {
1727         case 0x30:
1728                 data->type = w83782d;
1729                 data->name = "w83782d";
1730                 break;
1731         default:
1732                 data->type = w83781d;
1733                 data->name = "w83781d";
1734         }
1735
1736         /* Initialize the W83781D chip */
1737         w83781d_init_device(&pdev->dev);
1738
1739         /* Register sysfs hooks */
1740         err = w83781d_create_files(&pdev->dev, data->type, 1);
1741         if (err)
1742                 goto exit_remove_files;
1743
1744         err = device_create_file(&pdev->dev, &dev_attr_name);
1745         if (err)
1746                 goto exit_remove_files;
1747
1748         data->hwmon_dev = hwmon_device_register(&pdev->dev);
1749         if (IS_ERR(data->hwmon_dev)) {
1750                 err = PTR_ERR(data->hwmon_dev);
1751                 goto exit_remove_files;
1752         }
1753
1754         return 0;
1755
1756  exit_remove_files:
1757         sysfs_remove_group(&pdev->dev.kobj, &w83781d_group);
1758         sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt);
1759         device_remove_file(&pdev->dev, &dev_attr_name);
1760         kfree(data);
1761  exit_release_region:
1762         release_region(res->start + W83781D_ADDR_REG_OFFSET, 2);
1763  exit:
1764         return err;
1765 }
1766
1767 static int __devexit
1768 w83781d_isa_remove(struct platform_device *pdev)
1769 {
1770         struct w83781d_data *data = platform_get_drvdata(pdev);
1771
1772         hwmon_device_unregister(data->hwmon_dev);
1773         sysfs_remove_group(&pdev->dev.kobj, &w83781d_group);
1774         sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt);
1775         device_remove_file(&pdev->dev, &dev_attr_name);
1776         release_region(data->isa_addr + W83781D_ADDR_REG_OFFSET, 2);
1777         kfree(data);
1778
1779         return 0;
1780 }
1781
1782 static struct platform_driver w83781d_isa_driver = {
1783         .driver = {
1784                 .owner = THIS_MODULE,
1785                 .name = "w83781d",
1786         },
1787         .probe = w83781d_isa_probe,
1788         .remove = __devexit_p(w83781d_isa_remove),
1789 };
1790
1791 /* return 1 if a supported chip is found, 0 otherwise */
1792 static int __init
1793 w83781d_isa_found(unsigned short address)
1794 {
1795         int val, save, found = 0;
1796         int port;
1797
1798         /* Some boards declare base+0 to base+7 as a PNP device, some base+4
1799          * to base+7 and some base+5 to base+6. So we better request each port
1800          * individually for the probing phase. */
1801         for (port = address; port < address + W83781D_EXTENT; port++) {
1802                 if (!request_region(port, 1, "w83781d")) {
1803                         pr_debug("w83781d: Failed to request port 0x%x\n",
1804                                  port);
1805                         goto release;
1806                 }
1807         }
1808
1809 #define REALLY_SLOW_IO
1810         /* We need the timeouts for at least some W83781D-like
1811            chips. But only if we read 'undefined' registers. */
1812         val = inb_p(address + 1);
1813         if (inb_p(address + 2) != val
1814          || inb_p(address + 3) != val
1815          || inb_p(address + 7) != val) {
1816                 pr_debug("w83781d: Detection failed at step 1\n");
1817                 goto release;
1818         }
1819 #undef REALLY_SLOW_IO
1820
1821         /* We should be able to change the 7 LSB of the address port. The
1822            MSB (busy flag) should be clear initially, set after the write. */
1823         save = inb_p(address + W83781D_ADDR_REG_OFFSET);
1824         if (save & 0x80) {
1825                 pr_debug("w83781d: Detection failed at step 2\n");
1826                 goto release;
1827         }
1828         val = ~save & 0x7f;
1829         outb_p(val, address + W83781D_ADDR_REG_OFFSET);
1830         if (inb_p(address + W83781D_ADDR_REG_OFFSET) != (val | 0x80)) {
1831                 outb_p(save, address + W83781D_ADDR_REG_OFFSET);
1832                 pr_debug("w83781d: Detection failed at step 3\n");
1833                 goto release;
1834         }
1835
1836         /* We found a device, now see if it could be a W83781D */
1837         outb_p(W83781D_REG_CONFIG, address + W83781D_ADDR_REG_OFFSET);
1838         val = inb_p(address + W83781D_DATA_REG_OFFSET);
1839         if (val & 0x80) {
1840                 pr_debug("w83781d: Detection failed at step 4\n");
1841                 goto release;
1842         }
1843         outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET);
1844         save = inb_p(address + W83781D_DATA_REG_OFFSET);
1845         outb_p(W83781D_REG_CHIPMAN, address + W83781D_ADDR_REG_OFFSET);
1846         val = inb_p(address + W83781D_DATA_REG_OFFSET);
1847         if ((!(save & 0x80) && (val != 0xa3))
1848          || ((save & 0x80) && (val != 0x5c))) {
1849                 pr_debug("w83781d: Detection failed at step 5\n");
1850                 goto release;
1851         }
1852         outb_p(W83781D_REG_I2C_ADDR, address + W83781D_ADDR_REG_OFFSET);
1853         val = inb_p(address + W83781D_DATA_REG_OFFSET);
1854         if (val < 0x03 || val > 0x77) { /* Not a valid I2C address */
1855                 pr_debug("w83781d: Detection failed at step 6\n");
1856                 goto release;
1857         }
1858
1859         /* The busy flag should be clear again */
1860         if (inb_p(address + W83781D_ADDR_REG_OFFSET) & 0x80) {
1861                 pr_debug("w83781d: Detection failed at step 7\n");
1862                 goto release;
1863         }
1864
1865         /* Determine the chip type */
1866         outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET);
1867         save = inb_p(address + W83781D_DATA_REG_OFFSET);
1868         outb_p(save & 0xf8, address + W83781D_DATA_REG_OFFSET);
1869         outb_p(W83781D_REG_WCHIPID, address + W83781D_ADDR_REG_OFFSET);
1870         val = inb_p(address + W83781D_DATA_REG_OFFSET);
1871         if ((val & 0xfe) == 0x10        /* W83781D */
1872          || val == 0x30)                /* W83782D */
1873                 found = 1;
1874
1875         if (found)
1876                 pr_info("w83781d: Found a %s chip at %#x\n",
1877                         val == 0x30 ? "W83782D" : "W83781D", (int)address);
1878
1879  release:
1880         for (port--; port >= address; port--)
1881                 release_region(port, 1);
1882         return found;
1883 }
1884
1885 static int __init
1886 w83781d_isa_device_add(unsigned short address)
1887 {
1888         struct resource res = {
1889                 .start  = address,
1890                 .end    = address + W83781D_EXTENT - 1,
1891                 .name   = "w83781d",
1892                 .flags  = IORESOURCE_IO,
1893         };
1894         int err;
1895
1896         pdev = platform_device_alloc("w83781d", address);
1897         if (!pdev) {
1898                 err = -ENOMEM;
1899                 printk(KERN_ERR "w83781d: Device allocation failed\n");
1900                 goto exit;
1901         }
1902
1903         err = platform_device_add_resources(pdev, &res, 1);
1904         if (err) {
1905                 printk(KERN_ERR "w83781d: Device resource addition failed "
1906                        "(%d)\n", err);
1907                 goto exit_device_put;
1908         }
1909
1910         err = platform_device_add(pdev);
1911         if (err) {
1912                 printk(KERN_ERR "w83781d: Device addition failed (%d)\n",
1913                        err);
1914                 goto exit_device_put;
1915         }
1916
1917         return 0;
1918
1919  exit_device_put:
1920         platform_device_put(pdev);
1921  exit:
1922         pdev = NULL;
1923         return err;
1924 }
1925
1926 static int __init
1927 w83781d_isa_register(void)
1928 {
1929         int res;
1930
1931         if (w83781d_isa_found(isa_address)) {
1932                 res = platform_driver_register(&w83781d_isa_driver);
1933                 if (res)
1934                         goto exit;
1935
1936                 /* Sets global pdev as a side effect */
1937                 res = w83781d_isa_device_add(isa_address);
1938                 if (res)
1939                         goto exit_unreg_isa_driver;
1940         }
1941
1942         return 0;
1943
1944 exit_unreg_isa_driver:
1945         platform_driver_unregister(&w83781d_isa_driver);
1946 exit:
1947         return res;
1948 }
1949
1950 static void
1951 w83781d_isa_unregister(void)
1952 {
1953         if (pdev) {
1954                 platform_device_unregister(pdev);
1955                 platform_driver_unregister(&w83781d_isa_driver);
1956         }
1957 }
1958 #else /* !CONFIG_ISA */
1959
1960 static struct w83781d_data *w83781d_data_if_isa(void)
1961 {
1962         return NULL;
1963 }
1964
1965 static int
1966 w83781d_alias_detect(struct i2c_client *client, u8 chipid)
1967 {
1968         return 0;
1969 }
1970
1971 static int
1972 w83781d_read_value(struct w83781d_data *data, u16 reg)
1973 {
1974         int res;
1975
1976         mutex_lock(&data->lock);
1977         res = w83781d_read_value_i2c(data, reg);
1978         mutex_unlock(&data->lock);
1979
1980         return res;
1981 }
1982
1983 static int
1984 w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
1985 {
1986         mutex_lock(&data->lock);
1987         w83781d_write_value_i2c(data, reg, value);
1988         mutex_unlock(&data->lock);
1989
1990         return 0;
1991 }
1992
1993 static int __init
1994 w83781d_isa_register(void)
1995 {
1996         return 0;
1997 }
1998
1999 static void
2000 w83781d_isa_unregister(void)
2001 {
2002 }
2003 #endif /* CONFIG_ISA */
2004
2005 static int __init
2006 sensors_w83781d_init(void)
2007 {
2008         int res;
2009
2010         /* We register the ISA device first, so that we can skip the
2011          * registration of an I2C interface to the same device. */
2012         res = w83781d_isa_register();
2013         if (res)
2014                 goto exit;
2015
2016         res = i2c_add_driver(&w83781d_driver);
2017         if (res)
2018                 goto exit_unreg_isa;
2019
2020         return 0;
2021
2022  exit_unreg_isa:
2023         w83781d_isa_unregister();
2024  exit:
2025         return res;
2026 }
2027
2028 static void __exit
2029 sensors_w83781d_exit(void)
2030 {
2031         w83781d_isa_unregister();
2032         i2c_del_driver(&w83781d_driver);
2033 }
2034
2035 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
2036               "Philip Edelbrock <phil@netroedge.com>, "
2037               "and Mark Studebaker <mdsxyz123@yahoo.com>");
2038 MODULE_DESCRIPTION("W83781D driver");
2039 MODULE_LICENSE("GPL");
2040
2041 module_init(sensors_w83781d_init);
2042 module_exit(sensors_w83781d_exit);