9168e983ca1d53b4a946316e22da7a362ca89c8e
[linux-2.6.git] / drivers / hwmon / adm1031.c
1 /*
2   adm1031.c - Part of lm_sensors, Linux kernel modules for hardware
3   monitoring
4   Based on lm75.c and lm85.c
5   Supports adm1030 / adm1031
6   Copyright (C) 2004 Alexandre d'Alton <alex@alexdalton.org>
7   Reworked by 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 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/slab.h>
27 #include <linux/jiffies.h>
28 #include <linux/i2c.h>
29 #include <linux/i2c-sensor.h>
30
31 /* Following macros takes channel parameter starting from 0 to 2 */
32 #define ADM1031_REG_FAN_SPEED(nr)       (0x08 + (nr))
33 #define ADM1031_REG_FAN_DIV(nr)         (0x20  + (nr))
34 #define ADM1031_REG_PWM                 (0x22)
35 #define ADM1031_REG_FAN_MIN(nr)         (0x10 + (nr))
36
37 #define ADM1031_REG_TEMP_MAX(nr)        (0x14  + 4*(nr))
38 #define ADM1031_REG_TEMP_MIN(nr)        (0x15  + 4*(nr))
39 #define ADM1031_REG_TEMP_CRIT(nr)       (0x16  + 4*(nr))
40
41 #define ADM1031_REG_TEMP(nr)            (0xa + (nr))
42 #define ADM1031_REG_AUTO_TEMP(nr)       (0x24 + (nr))
43
44 #define ADM1031_REG_STATUS(nr)          (0x2 + (nr))
45
46 #define ADM1031_REG_CONF1               0x0
47 #define ADM1031_REG_CONF2               0x1
48 #define ADM1031_REG_EXT_TEMP            0x6
49
50 #define ADM1031_CONF1_MONITOR_ENABLE    0x01    /* Monitoring enable */
51 #define ADM1031_CONF1_PWM_INVERT        0x08    /* PWM Invert */
52 #define ADM1031_CONF1_AUTO_MODE         0x80    /* Auto FAN */
53
54 #define ADM1031_CONF2_PWM1_ENABLE       0x01
55 #define ADM1031_CONF2_PWM2_ENABLE       0x02
56 #define ADM1031_CONF2_TACH1_ENABLE      0x04
57 #define ADM1031_CONF2_TACH2_ENABLE      0x08
58 #define ADM1031_CONF2_TEMP_ENABLE(chan) (0x10 << (chan))
59
60 /* Addresses to scan */
61 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
62 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
63
64 /* Insmod parameters */
65 SENSORS_INSMOD_2(adm1030, adm1031);
66
67 typedef u8 auto_chan_table_t[8][2];
68
69 /* Each client has this additional data */
70 struct adm1031_data {
71         struct i2c_client client;
72         struct semaphore update_lock;
73         int chip_type;
74         char valid;             /* !=0 if following fields are valid */
75         unsigned long last_updated;     /* In jiffies */
76         /* The chan_select_table contains the possible configurations for
77          * auto fan control.
78          */
79         auto_chan_table_t *chan_select_table;
80         u16 alarm;
81         u8 conf1;
82         u8 conf2;
83         u8 fan[2];
84         u8 fan_div[2];
85         u8 fan_min[2];
86         u8 pwm[2];
87         u8 old_pwm[2];
88         s8 temp[3];
89         u8 ext_temp[3];
90         u8 auto_temp[3];
91         u8 auto_temp_min[3];
92         u8 auto_temp_off[3];
93         u8 auto_temp_max[3];
94         s8 temp_min[3];
95         s8 temp_max[3];
96         s8 temp_crit[3];
97 };
98
99 static int adm1031_attach_adapter(struct i2c_adapter *adapter);
100 static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind);
101 static void adm1031_init_client(struct i2c_client *client);
102 static int adm1031_detach_client(struct i2c_client *client);
103 static struct adm1031_data *adm1031_update_device(struct device *dev);
104
105 /* This is the driver that will be inserted */
106 static struct i2c_driver adm1031_driver = {
107         .owner = THIS_MODULE,
108         .name = "adm1031",
109         .flags = I2C_DF_NOTIFY,
110         .attach_adapter = adm1031_attach_adapter,
111         .detach_client = adm1031_detach_client,
112 };
113
114 static inline u8 adm1031_read_value(struct i2c_client *client, u8 reg)
115 {
116         return i2c_smbus_read_byte_data(client, reg);
117 }
118
119 static inline int
120 adm1031_write_value(struct i2c_client *client, u8 reg, unsigned int value)
121 {
122         return i2c_smbus_write_byte_data(client, reg, value);
123 }
124
125
126 #define TEMP_TO_REG(val)                (((val) < 0 ? ((val - 500) / 1000) : \
127                                         ((val + 500) / 1000)))
128
129 #define TEMP_FROM_REG(val)              ((val) * 1000)
130
131 #define TEMP_FROM_REG_EXT(val, ext)     (TEMP_FROM_REG(val) + (ext) * 125)
132
133 #define FAN_FROM_REG(reg, div)          ((reg) ? (11250 * 60) / ((reg) * (div)) : 0)
134
135 static int FAN_TO_REG(int reg, int div)
136 {
137         int tmp;
138         tmp = FAN_FROM_REG(SENSORS_LIMIT(reg, 0, 65535), div);
139         return tmp > 255 ? 255 : tmp;
140 }
141
142 #define FAN_DIV_FROM_REG(reg)           (1<<(((reg)&0xc0)>>6))
143
144 #define PWM_TO_REG(val)                 (SENSORS_LIMIT((val), 0, 255) >> 4)
145 #define PWM_FROM_REG(val)               ((val) << 4)
146
147 #define FAN_CHAN_FROM_REG(reg)          (((reg) >> 5) & 7)
148 #define FAN_CHAN_TO_REG(val, reg)       \
149         (((reg) & 0x1F) | (((val) << 5) & 0xe0))
150
151 #define AUTO_TEMP_MIN_TO_REG(val, reg)  \
152         ((((val)/500) & 0xf8)|((reg) & 0x7))
153 #define AUTO_TEMP_RANGE_FROM_REG(reg)   (5000 * (1<< ((reg)&0x7)))
154 #define AUTO_TEMP_MIN_FROM_REG(reg)     (1000 * ((((reg) >> 3) & 0x1f) << 2))
155
156 #define AUTO_TEMP_MIN_FROM_REG_DEG(reg) ((((reg) >> 3) & 0x1f) << 2)
157
158 #define AUTO_TEMP_OFF_FROM_REG(reg)             \
159         (AUTO_TEMP_MIN_FROM_REG(reg) - 5000)
160
161 #define AUTO_TEMP_MAX_FROM_REG(reg)             \
162         (AUTO_TEMP_RANGE_FROM_REG(reg) +        \
163         AUTO_TEMP_MIN_FROM_REG(reg))
164
165 static int AUTO_TEMP_MAX_TO_REG(int val, int reg, int pwm)
166 {
167         int ret;
168         int range = val - AUTO_TEMP_MIN_FROM_REG(reg);
169
170         range = ((val - AUTO_TEMP_MIN_FROM_REG(reg))*10)/(16 - pwm);
171         ret = ((reg & 0xf8) |
172                (range < 10000 ? 0 :
173                 range < 20000 ? 1 :
174                 range < 40000 ? 2 : range < 80000 ? 3 : 4));
175         return ret;
176 }
177
178 /* FAN auto control */
179 #define GET_FAN_AUTO_BITFIELD(data, idx)        \
180         (*(data)->chan_select_table)[FAN_CHAN_FROM_REG((data)->conf1)][idx%2]
181
182 /* The tables below contains the possible values for the auto fan 
183  * control bitfields. the index in the table is the register value.
184  * MSb is the auto fan control enable bit, so the four first entries
185  * in the table disables auto fan control when both bitfields are zero.
186  */
187 static auto_chan_table_t auto_channel_select_table_adm1031 = {
188         {0, 0}, {0, 0}, {0, 0}, {0, 0},
189         {2 /*0b010 */ , 4 /*0b100 */ },
190         {2 /*0b010 */ , 2 /*0b010 */ },
191         {4 /*0b100 */ , 4 /*0b100 */ },
192         {7 /*0b111 */ , 7 /*0b111 */ },
193 };
194
195 static auto_chan_table_t auto_channel_select_table_adm1030 = {
196         {0, 0}, {0, 0}, {0, 0}, {0, 0},
197         {2 /*0b10 */            , 0},
198         {0xff /*invalid */      , 0},
199         {0xff /*invalid */      , 0},
200         {3 /*0b11 */            , 0},
201 };
202
203 /* That function checks if a bitfield is valid and returns the other bitfield
204  * nearest match if no exact match where found.
205  */
206 static int
207 get_fan_auto_nearest(struct adm1031_data *data,
208                      int chan, u8 val, u8 reg, u8 * new_reg)
209 {
210         int i;
211         int first_match = -1, exact_match = -1;
212         u8 other_reg_val =
213             (*data->chan_select_table)[FAN_CHAN_FROM_REG(reg)][chan ? 0 : 1];
214
215         if (val == 0) {
216                 *new_reg = 0;
217                 return 0;
218         }
219
220         for (i = 0; i < 8; i++) {
221                 if ((val == (*data->chan_select_table)[i][chan]) &&
222                     ((*data->chan_select_table)[i][chan ? 0 : 1] ==
223                      other_reg_val)) {
224                         /* We found an exact match */
225                         exact_match = i;
226                         break;
227                 } else if (val == (*data->chan_select_table)[i][chan] &&
228                            first_match == -1) {
229                         /* Save the first match in case of an exact match has not been
230                          * found 
231                          */
232                         first_match = i;
233                 }
234         }
235
236         if (exact_match >= 0) {
237                 *new_reg = exact_match;
238         } else if (first_match >= 0) {
239                 *new_reg = first_match;
240         } else {
241                 return -EINVAL;
242         }
243         return 0;
244 }
245
246 static ssize_t show_fan_auto_channel(struct device *dev, char *buf, int nr)
247 {
248         struct adm1031_data *data = adm1031_update_device(dev);
249         return sprintf(buf, "%d\n", GET_FAN_AUTO_BITFIELD(data, nr));
250 }
251
252 static ssize_t
253 set_fan_auto_channel(struct device *dev, const char *buf, size_t count, int nr)
254 {
255         struct i2c_client *client = to_i2c_client(dev);
256         struct adm1031_data *data = i2c_get_clientdata(client);
257         int val = simple_strtol(buf, NULL, 10);
258         u8 reg;
259         int ret;
260         u8 old_fan_mode;
261
262         old_fan_mode = data->conf1;
263
264         down(&data->update_lock);
265         
266         if ((ret = get_fan_auto_nearest(data, nr, val, data->conf1, &reg))) {
267                 up(&data->update_lock);
268                 return ret;
269         }
270         if (((data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1)) & ADM1031_CONF1_AUTO_MODE) ^ 
271             (old_fan_mode & ADM1031_CONF1_AUTO_MODE)) {
272                 if (data->conf1 & ADM1031_CONF1_AUTO_MODE){
273                         /* Switch to Auto Fan Mode 
274                          * Save PWM registers 
275                          * Set PWM registers to 33% Both */
276                         data->old_pwm[0] = data->pwm[0];
277                         data->old_pwm[1] = data->pwm[1];
278                         adm1031_write_value(client, ADM1031_REG_PWM, 0x55);
279                 } else {
280                         /* Switch to Manual Mode */
281                         data->pwm[0] = data->old_pwm[0];
282                         data->pwm[1] = data->old_pwm[1];
283                         /* Restore PWM registers */
284                         adm1031_write_value(client, ADM1031_REG_PWM, 
285                                             data->pwm[0] | (data->pwm[1] << 4));
286                 }
287         }
288         data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1);
289         adm1031_write_value(client, ADM1031_REG_CONF1, data->conf1);
290         up(&data->update_lock);
291         return count;
292 }
293
294 #define fan_auto_channel_offset(offset)                                         \
295 static ssize_t show_fan_auto_channel_##offset (struct device *dev, struct device_attribute *attr, char *buf)    \
296 {                                                                               \
297         return show_fan_auto_channel(dev, buf, offset - 1);                     \
298 }                                                                               \
299 static ssize_t set_fan_auto_channel_##offset (struct device *dev, struct device_attribute *attr,                \
300         const char *buf, size_t count)                                          \
301 {                                                                               \
302         return set_fan_auto_channel(dev, buf, count, offset - 1);               \
303 }                                                                               \
304 static DEVICE_ATTR(auto_fan##offset##_channel, S_IRUGO | S_IWUSR,               \
305                    show_fan_auto_channel_##offset,                              \
306                    set_fan_auto_channel_##offset)
307
308 fan_auto_channel_offset(1);
309 fan_auto_channel_offset(2);
310
311 /* Auto Temps */
312 static ssize_t show_auto_temp_off(struct device *dev, char *buf, int nr)
313 {
314         struct adm1031_data *data = adm1031_update_device(dev);
315         return sprintf(buf, "%d\n", 
316                        AUTO_TEMP_OFF_FROM_REG(data->auto_temp[nr]));
317 }
318 static ssize_t show_auto_temp_min(struct device *dev, char *buf, int nr)
319 {
320         struct adm1031_data *data = adm1031_update_device(dev);
321         return sprintf(buf, "%d\n",
322                        AUTO_TEMP_MIN_FROM_REG(data->auto_temp[nr]));
323 }
324 static ssize_t
325 set_auto_temp_min(struct device *dev, const char *buf, size_t count, int nr)
326 {
327         struct i2c_client *client = to_i2c_client(dev);
328         struct adm1031_data *data = i2c_get_clientdata(client);
329         int val = simple_strtol(buf, NULL, 10);
330
331         down(&data->update_lock);
332         data->auto_temp[nr] = AUTO_TEMP_MIN_TO_REG(val, data->auto_temp[nr]);
333         adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
334                             data->auto_temp[nr]);
335         up(&data->update_lock);
336         return count;
337 }
338 static ssize_t show_auto_temp_max(struct device *dev, char *buf, int nr)
339 {
340         struct adm1031_data *data = adm1031_update_device(dev);
341         return sprintf(buf, "%d\n",
342                        AUTO_TEMP_MAX_FROM_REG(data->auto_temp[nr]));
343 }
344 static ssize_t
345 set_auto_temp_max(struct device *dev, const char *buf, size_t count, int nr)
346 {
347         struct i2c_client *client = to_i2c_client(dev);
348         struct adm1031_data *data = i2c_get_clientdata(client);
349         int val = simple_strtol(buf, NULL, 10);
350
351         down(&data->update_lock);
352         data->temp_max[nr] = AUTO_TEMP_MAX_TO_REG(val, data->auto_temp[nr], data->pwm[nr]);
353         adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
354                             data->temp_max[nr]);
355         up(&data->update_lock);
356         return count;
357 }
358
359 #define auto_temp_reg(offset)                                                   \
360 static ssize_t show_auto_temp_##offset##_off (struct device *dev, struct device_attribute *attr, char *buf)     \
361 {                                                                               \
362         return show_auto_temp_off(dev, buf, offset - 1);                        \
363 }                                                                               \
364 static ssize_t show_auto_temp_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf)     \
365 {                                                                               \
366         return show_auto_temp_min(dev, buf, offset - 1);                        \
367 }                                                                               \
368 static ssize_t show_auto_temp_##offset##_max (struct device *dev, struct device_attribute *attr, char *buf)     \
369 {                                                                               \
370         return show_auto_temp_max(dev, buf, offset - 1);                        \
371 }                                                                               \
372 static ssize_t set_auto_temp_##offset##_min (struct device *dev, struct device_attribute *attr,         \
373                                              const char *buf, size_t count)     \
374 {                                                                               \
375         return set_auto_temp_min(dev, buf, count, offset - 1);          \
376 }                                                                               \
377 static ssize_t set_auto_temp_##offset##_max (struct device *dev, struct device_attribute *attr,         \
378                                              const char *buf, size_t count)     \
379 {                                                                               \
380         return set_auto_temp_max(dev, buf, count, offset - 1);          \
381 }                                                                               \
382 static DEVICE_ATTR(auto_temp##offset##_off, S_IRUGO,                            \
383                    show_auto_temp_##offset##_off, NULL);                        \
384 static DEVICE_ATTR(auto_temp##offset##_min, S_IRUGO | S_IWUSR,                  \
385                    show_auto_temp_##offset##_min, set_auto_temp_##offset##_min);\
386 static DEVICE_ATTR(auto_temp##offset##_max, S_IRUGO | S_IWUSR,                  \
387                    show_auto_temp_##offset##_max, set_auto_temp_##offset##_max)
388
389 auto_temp_reg(1);
390 auto_temp_reg(2);
391 auto_temp_reg(3);
392
393 /* pwm */
394 static ssize_t show_pwm(struct device *dev, char *buf, int nr)
395 {
396         struct adm1031_data *data = adm1031_update_device(dev);
397         return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
398 }
399 static ssize_t
400 set_pwm(struct device *dev, const char *buf, size_t count, int nr)
401 {
402         struct i2c_client *client = to_i2c_client(dev);
403         struct adm1031_data *data = i2c_get_clientdata(client);
404         int val = simple_strtol(buf, NULL, 10);
405         int reg;
406
407         down(&data->update_lock);
408         if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) && 
409             (((val>>4) & 0xf) != 5)) {
410                 /* In automatic mode, the only PWM accepted is 33% */
411                 up(&data->update_lock);
412                 return -EINVAL;
413         }
414         data->pwm[nr] = PWM_TO_REG(val);
415         reg = adm1031_read_value(client, ADM1031_REG_PWM);
416         adm1031_write_value(client, ADM1031_REG_PWM,
417                             nr ? ((data->pwm[nr] << 4) & 0xf0) | (reg & 0xf)
418                             : (data->pwm[nr] & 0xf) | (reg & 0xf0));
419         up(&data->update_lock);
420         return count;
421 }
422
423 #define pwm_reg(offset)                                                 \
424 static ssize_t show_pwm_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
425 {                                                                       \
426         return show_pwm(dev, buf, offset - 1);                  \
427 }                                                                       \
428 static ssize_t set_pwm_##offset (struct device *dev, struct device_attribute *attr,                     \
429                                  const char *buf, size_t count)         \
430 {                                                                       \
431         return set_pwm(dev, buf, count, offset - 1);            \
432 }                                                                       \
433 static DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR,                      \
434                    show_pwm_##offset, set_pwm_##offset)
435
436 pwm_reg(1);
437 pwm_reg(2);
438
439 /* Fans */
440
441 /*
442  * That function checks the cases where the fan reading is not
443  * relevant.  It is used to provide 0 as fan reading when the fan is
444  * not supposed to run
445  */
446 static int trust_fan_readings(struct adm1031_data *data, int chan)
447 {
448         int res = 0;
449
450         if (data->conf1 & ADM1031_CONF1_AUTO_MODE) {
451                 switch (data->conf1 & 0x60) {
452                 case 0x00:      /* remote temp1 controls fan1 remote temp2 controls fan2 */
453                         res = data->temp[chan+1] >=
454                               AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[chan+1]);
455                         break;
456                 case 0x20:      /* remote temp1 controls both fans */
457                         res =
458                             data->temp[1] >=
459                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1]);
460                         break;
461                 case 0x40:      /* remote temp2 controls both fans */
462                         res =
463                             data->temp[2] >=
464                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]);
465                         break;
466                 case 0x60:      /* max controls both fans */
467                         res =
468                             data->temp[0] >=
469                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[0])
470                             || data->temp[1] >=
471                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1])
472                             || (data->chip_type == adm1031 
473                                 && data->temp[2] >=
474                                 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]));
475                         break;
476                 }
477         } else {
478                 res = data->pwm[chan] > 0;
479         }
480         return res;
481 }
482
483
484 static ssize_t show_fan(struct device *dev, char *buf, int nr)
485 {
486         struct adm1031_data *data = adm1031_update_device(dev);
487         int value;
488
489         value = trust_fan_readings(data, nr) ? FAN_FROM_REG(data->fan[nr],
490                                  FAN_DIV_FROM_REG(data->fan_div[nr])) : 0;
491         return sprintf(buf, "%d\n", value);
492 }
493
494 static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
495 {
496         struct adm1031_data *data = adm1031_update_device(dev);
497         return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[nr]));
498 }
499 static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
500 {
501         struct adm1031_data *data = adm1031_update_device(dev);
502         return sprintf(buf, "%d\n",
503                        FAN_FROM_REG(data->fan_min[nr],
504                                     FAN_DIV_FROM_REG(data->fan_div[nr])));
505 }
506 static ssize_t
507 set_fan_min(struct device *dev, const char *buf, size_t count, int nr)
508 {
509         struct i2c_client *client = to_i2c_client(dev);
510         struct adm1031_data *data = i2c_get_clientdata(client);
511         int val = simple_strtol(buf, NULL, 10);
512
513         down(&data->update_lock);
514         if (val) {
515                 data->fan_min[nr] = 
516                         FAN_TO_REG(val, FAN_DIV_FROM_REG(data->fan_div[nr]));
517         } else {
518                 data->fan_min[nr] = 0xff;
519         }
520         adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), data->fan_min[nr]);
521         up(&data->update_lock);
522         return count;
523 }
524 static ssize_t
525 set_fan_div(struct device *dev, const char *buf, size_t count, int nr)
526 {
527         struct i2c_client *client = to_i2c_client(dev);
528         struct adm1031_data *data = i2c_get_clientdata(client);
529         int val = simple_strtol(buf, NULL, 10);
530         u8 tmp;
531         int old_div;
532         int new_min;
533
534         tmp = val == 8 ? 0xc0 :
535               val == 4 ? 0x80 :
536               val == 2 ? 0x40 : 
537               val == 1 ? 0x00 :  
538               0xff;
539         if (tmp == 0xff)
540                 return -EINVAL;
541         
542         down(&data->update_lock);
543         old_div = FAN_DIV_FROM_REG(data->fan_div[nr]);
544         data->fan_div[nr] = (tmp & 0xC0) | (0x3f & data->fan_div[nr]);
545         new_min = data->fan_min[nr] * old_div / 
546                 FAN_DIV_FROM_REG(data->fan_div[nr]);
547         data->fan_min[nr] = new_min > 0xff ? 0xff : new_min;
548         data->fan[nr] = data->fan[nr] * old_div / 
549                 FAN_DIV_FROM_REG(data->fan_div[nr]);
550
551         adm1031_write_value(client, ADM1031_REG_FAN_DIV(nr), 
552                             data->fan_div[nr]);
553         adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), 
554                             data->fan_min[nr]);
555         up(&data->update_lock);
556         return count;
557 }
558
559 #define fan_offset(offset)                                              \
560 static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
561 {                                                                       \
562         return show_fan(dev, buf, offset - 1);                  \
563 }                                                                       \
564 static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf)   \
565 {                                                                       \
566         return show_fan_min(dev, buf, offset - 1);                      \
567 }                                                                       \
568 static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf)   \
569 {                                                                       \
570         return show_fan_div(dev, buf, offset - 1);                      \
571 }                                                                       \
572 static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr,               \
573         const char *buf, size_t count)                                  \
574 {                                                                       \
575         return set_fan_min(dev, buf, count, offset - 1);                \
576 }                                                                       \
577 static ssize_t set_fan_##offset##_div (struct device *dev, struct device_attribute *attr,               \
578         const char *buf, size_t count)                                  \
579 {                                                                       \
580         return set_fan_div(dev, buf, count, offset - 1);                \
581 }                                                                       \
582 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset,     \
583                    NULL);                                               \
584 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,                \
585                    show_fan_##offset##_min, set_fan_##offset##_min);    \
586 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR,                \
587                    show_fan_##offset##_div, set_fan_##offset##_div);    \
588 static DEVICE_ATTR(auto_fan##offset##_min_pwm, S_IRUGO | S_IWUSR,       \
589                    show_pwm_##offset, set_pwm_##offset)
590
591 fan_offset(1);
592 fan_offset(2);
593
594
595 /* Temps */
596 static ssize_t show_temp(struct device *dev, char *buf, int nr)
597 {
598         struct adm1031_data *data = adm1031_update_device(dev);
599         int ext;
600         ext = nr == 0 ?
601             ((data->ext_temp[nr] >> 6) & 0x3) * 2 :
602             (((data->ext_temp[nr] >> ((nr - 1) * 3)) & 7));
603         return sprintf(buf, "%d\n", TEMP_FROM_REG_EXT(data->temp[nr], ext));
604 }
605 static ssize_t show_temp_min(struct device *dev, char *buf, int nr)
606 {
607         struct adm1031_data *data = adm1031_update_device(dev);
608         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
609 }
610 static ssize_t show_temp_max(struct device *dev, char *buf, int nr)
611 {
612         struct adm1031_data *data = adm1031_update_device(dev);
613         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
614 }
615 static ssize_t show_temp_crit(struct device *dev, char *buf, int nr)
616 {
617         struct adm1031_data *data = adm1031_update_device(dev);
618         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit[nr]));
619 }
620 static ssize_t
621 set_temp_min(struct device *dev, const char *buf, size_t count, int nr)
622 {
623         struct i2c_client *client = to_i2c_client(dev);
624         struct adm1031_data *data = i2c_get_clientdata(client);
625         int val;
626
627         val = simple_strtol(buf, NULL, 10);
628         val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
629         down(&data->update_lock);
630         data->temp_min[nr] = TEMP_TO_REG(val);
631         adm1031_write_value(client, ADM1031_REG_TEMP_MIN(nr),
632                             data->temp_min[nr]);
633         up(&data->update_lock);
634         return count;
635 }
636 static ssize_t
637 set_temp_max(struct device *dev, const char *buf, size_t count, int nr)
638 {
639         struct i2c_client *client = to_i2c_client(dev);
640         struct adm1031_data *data = i2c_get_clientdata(client);
641         int val;
642
643         val = simple_strtol(buf, NULL, 10);
644         val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
645         down(&data->update_lock);
646         data->temp_max[nr] = TEMP_TO_REG(val);
647         adm1031_write_value(client, ADM1031_REG_TEMP_MAX(nr),
648                             data->temp_max[nr]);
649         up(&data->update_lock);
650         return count;
651 }
652 static ssize_t
653 set_temp_crit(struct device *dev, const char *buf, size_t count, int nr)
654 {
655         struct i2c_client *client = to_i2c_client(dev);
656         struct adm1031_data *data = i2c_get_clientdata(client);
657         int val;
658
659         val = simple_strtol(buf, NULL, 10);
660         val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
661         down(&data->update_lock);
662         data->temp_crit[nr] = TEMP_TO_REG(val);
663         adm1031_write_value(client, ADM1031_REG_TEMP_CRIT(nr),
664                             data->temp_crit[nr]);
665         up(&data->update_lock);
666         return count;
667 }
668
669 #define temp_reg(offset)                                                        \
670 static ssize_t show_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf)                \
671 {                                                                               \
672         return show_temp(dev, buf, offset - 1);                         \
673 }                                                                               \
674 static ssize_t show_temp_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf)          \
675 {                                                                               \
676         return show_temp_min(dev, buf, offset - 1);                             \
677 }                                                                               \
678 static ssize_t show_temp_##offset##_max (struct device *dev, struct device_attribute *attr, char *buf)          \
679 {                                                                               \
680         return show_temp_max(dev, buf, offset - 1);                             \
681 }                                                                               \
682 static ssize_t show_temp_##offset##_crit (struct device *dev, struct device_attribute *attr, char *buf) \
683 {                                                                               \
684         return show_temp_crit(dev, buf, offset - 1);                    \
685 }                                                                               \
686 static ssize_t set_temp_##offset##_min (struct device *dev, struct device_attribute *attr,                      \
687                                         const char *buf, size_t count)          \
688 {                                                                               \
689         return set_temp_min(dev, buf, count, offset - 1);                       \
690 }                                                                               \
691 static ssize_t set_temp_##offset##_max (struct device *dev, struct device_attribute *attr,                      \
692                                         const char *buf, size_t count)          \
693 {                                                                               \
694         return set_temp_max(dev, buf, count, offset - 1);                       \
695 }                                                                               \
696 static ssize_t set_temp_##offset##_crit (struct device *dev, struct device_attribute *attr,                     \
697                                          const char *buf, size_t count)         \
698 {                                                                               \
699         return set_temp_crit(dev, buf, count, offset - 1);                      \
700 }                                                                               \
701 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset,           \
702                    NULL);                                                       \
703 static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,                       \
704                    show_temp_##offset##_min, set_temp_##offset##_min);          \
705 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,                       \
706                    show_temp_##offset##_max, set_temp_##offset##_max);          \
707 static DEVICE_ATTR(temp##offset##_crit, S_IRUGO | S_IWUSR,                      \
708                    show_temp_##offset##_crit, set_temp_##offset##_crit)
709
710 temp_reg(1);
711 temp_reg(2);
712 temp_reg(3);
713
714 /* Alarms */
715 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
716 {
717         struct adm1031_data *data = adm1031_update_device(dev);
718         return sprintf(buf, "%d\n", data->alarm);
719 }
720
721 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
722
723
724 static int adm1031_attach_adapter(struct i2c_adapter *adapter)
725 {
726         if (!(adapter->class & I2C_CLASS_HWMON))
727                 return 0;
728         return i2c_detect(adapter, &addr_data, adm1031_detect);
729 }
730
731 /* This function is called by i2c_detect */
732 static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind)
733 {
734         struct i2c_client *new_client;
735         struct adm1031_data *data;
736         int err = 0;
737         const char *name = "";
738
739         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
740                 goto exit;
741
742         if (!(data = kmalloc(sizeof(struct adm1031_data), GFP_KERNEL))) {
743                 err = -ENOMEM;
744                 goto exit;
745         }
746         memset(data, 0, sizeof(struct adm1031_data));
747
748         new_client = &data->client;
749         i2c_set_clientdata(new_client, data);
750         new_client->addr = address;
751         new_client->adapter = adapter;
752         new_client->driver = &adm1031_driver;
753         new_client->flags = 0;
754
755         if (kind < 0) {
756                 int id, co;
757                 id = i2c_smbus_read_byte_data(new_client, 0x3d);
758                 co = i2c_smbus_read_byte_data(new_client, 0x3e);
759
760                 if (!((id == 0x31 || id == 0x30) && co == 0x41))
761                         goto exit_free;
762                 kind = (id == 0x30) ? adm1030 : adm1031;
763         }
764
765         if (kind <= 0)
766                 kind = adm1031;
767
768         /* Given the detected chip type, set the chip name and the
769          * auto fan control helper table. */
770         if (kind == adm1030) {
771                 name = "adm1030";
772                 data->chan_select_table = &auto_channel_select_table_adm1030;
773         } else if (kind == adm1031) {
774                 name = "adm1031";
775                 data->chan_select_table = &auto_channel_select_table_adm1031;
776         }
777         data->chip_type = kind;
778
779         strlcpy(new_client->name, name, I2C_NAME_SIZE);
780         data->valid = 0;
781         init_MUTEX(&data->update_lock);
782
783         /* Tell the I2C layer a new client has arrived */
784         if ((err = i2c_attach_client(new_client)))
785                 goto exit_free;
786
787         /* Initialize the ADM1031 chip */
788         adm1031_init_client(new_client);
789
790         /* Register sysfs hooks */
791         device_create_file(&new_client->dev, &dev_attr_fan1_input);
792         device_create_file(&new_client->dev, &dev_attr_fan1_div);
793         device_create_file(&new_client->dev, &dev_attr_fan1_min);
794         device_create_file(&new_client->dev, &dev_attr_pwm1);
795         device_create_file(&new_client->dev, &dev_attr_auto_fan1_channel);
796         device_create_file(&new_client->dev, &dev_attr_temp1_input);
797         device_create_file(&new_client->dev, &dev_attr_temp1_min);
798         device_create_file(&new_client->dev, &dev_attr_temp1_max);
799         device_create_file(&new_client->dev, &dev_attr_temp1_crit);
800         device_create_file(&new_client->dev, &dev_attr_temp2_input);
801         device_create_file(&new_client->dev, &dev_attr_temp2_min);
802         device_create_file(&new_client->dev, &dev_attr_temp2_max);
803         device_create_file(&new_client->dev, &dev_attr_temp2_crit);
804
805         device_create_file(&new_client->dev, &dev_attr_auto_temp1_off);
806         device_create_file(&new_client->dev, &dev_attr_auto_temp1_min);
807         device_create_file(&new_client->dev, &dev_attr_auto_temp1_max);
808
809         device_create_file(&new_client->dev, &dev_attr_auto_temp2_off);
810         device_create_file(&new_client->dev, &dev_attr_auto_temp2_min);
811         device_create_file(&new_client->dev, &dev_attr_auto_temp2_max);
812
813         device_create_file(&new_client->dev, &dev_attr_auto_fan1_min_pwm);
814
815         device_create_file(&new_client->dev, &dev_attr_alarms);
816
817         if (kind == adm1031) {
818                 device_create_file(&new_client->dev, &dev_attr_fan2_input);
819                 device_create_file(&new_client->dev, &dev_attr_fan2_div);
820                 device_create_file(&new_client->dev, &dev_attr_fan2_min);
821                 device_create_file(&new_client->dev, &dev_attr_pwm2);
822                 device_create_file(&new_client->dev,
823                                    &dev_attr_auto_fan2_channel);
824                 device_create_file(&new_client->dev, &dev_attr_temp3_input);
825                 device_create_file(&new_client->dev, &dev_attr_temp3_min);
826                 device_create_file(&new_client->dev, &dev_attr_temp3_max);
827                 device_create_file(&new_client->dev, &dev_attr_temp3_crit);
828                 device_create_file(&new_client->dev, &dev_attr_auto_temp3_off);
829                 device_create_file(&new_client->dev, &dev_attr_auto_temp3_min);
830                 device_create_file(&new_client->dev, &dev_attr_auto_temp3_max);
831                 device_create_file(&new_client->dev, &dev_attr_auto_fan2_min_pwm);
832         }
833
834         return 0;
835
836 exit_free:
837         kfree(new_client);
838 exit:
839         return err;
840 }
841
842 static int adm1031_detach_client(struct i2c_client *client)
843 {
844         int ret;
845         if ((ret = i2c_detach_client(client)) != 0) {
846                 return ret;
847         }
848         kfree(client);
849         return 0;
850 }
851
852 static void adm1031_init_client(struct i2c_client *client)
853 {
854         unsigned int read_val;
855         unsigned int mask;
856         struct adm1031_data *data = i2c_get_clientdata(client);
857
858         mask = (ADM1031_CONF2_PWM1_ENABLE | ADM1031_CONF2_TACH1_ENABLE);
859         if (data->chip_type == adm1031) {
860                 mask |= (ADM1031_CONF2_PWM2_ENABLE |
861                         ADM1031_CONF2_TACH2_ENABLE);
862         } 
863         /* Initialize the ADM1031 chip (enables fan speed reading ) */
864         read_val = adm1031_read_value(client, ADM1031_REG_CONF2);
865         if ((read_val | mask) != read_val) {
866             adm1031_write_value(client, ADM1031_REG_CONF2, read_val | mask);
867         }
868
869         read_val = adm1031_read_value(client, ADM1031_REG_CONF1);
870         if ((read_val | ADM1031_CONF1_MONITOR_ENABLE) != read_val) {
871             adm1031_write_value(client, ADM1031_REG_CONF1, read_val |
872                                 ADM1031_CONF1_MONITOR_ENABLE);
873         }
874
875 }
876
877 static struct adm1031_data *adm1031_update_device(struct device *dev)
878 {
879         struct i2c_client *client = to_i2c_client(dev);
880         struct adm1031_data *data = i2c_get_clientdata(client);
881         int chan;
882
883         down(&data->update_lock);
884
885         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
886             || !data->valid) {
887
888                 dev_dbg(&client->dev, "Starting adm1031 update\n");
889                 for (chan = 0;
890                      chan < ((data->chip_type == adm1031) ? 3 : 2); chan++) {
891                         u8 oldh, newh;
892
893                         oldh =
894                             adm1031_read_value(client, ADM1031_REG_TEMP(chan));
895                         data->ext_temp[chan] =
896                             adm1031_read_value(client, ADM1031_REG_EXT_TEMP);
897                         newh =
898                             adm1031_read_value(client, ADM1031_REG_TEMP(chan));
899                         if (newh != oldh) {
900                                 data->ext_temp[chan] =
901                                     adm1031_read_value(client,
902                                                        ADM1031_REG_EXT_TEMP);
903 #ifdef DEBUG
904                                 oldh =
905                                     adm1031_read_value(client,
906                                                        ADM1031_REG_TEMP(chan));
907
908                                 /* oldh is actually newer */
909                                 if (newh != oldh)
910                                         dev_warn(&client->dev,
911                                                  "Remote temperature may be "
912                                                  "wrong.\n");
913 #endif
914                         }
915                         data->temp[chan] = newh;
916
917                         data->temp_min[chan] =
918                             adm1031_read_value(client,
919                                                ADM1031_REG_TEMP_MIN(chan));
920                         data->temp_max[chan] =
921                             adm1031_read_value(client,
922                                                ADM1031_REG_TEMP_MAX(chan));
923                         data->temp_crit[chan] =
924                             adm1031_read_value(client,
925                                                ADM1031_REG_TEMP_CRIT(chan));
926                         data->auto_temp[chan] =
927                             adm1031_read_value(client,
928                                                ADM1031_REG_AUTO_TEMP(chan));
929
930                 }
931
932                 data->conf1 = adm1031_read_value(client, ADM1031_REG_CONF1);
933                 data->conf2 = adm1031_read_value(client, ADM1031_REG_CONF2);
934
935                 data->alarm = adm1031_read_value(client, ADM1031_REG_STATUS(0))
936                              | (adm1031_read_value(client, ADM1031_REG_STATUS(1))
937                                 << 8);
938                 if (data->chip_type == adm1030) {
939                         data->alarm &= 0xc0ff;
940                 }
941                 
942                 for (chan=0; chan<(data->chip_type == adm1030 ? 1 : 2); chan++) {
943                         data->fan_div[chan] =
944                             adm1031_read_value(client, ADM1031_REG_FAN_DIV(chan));
945                         data->fan_min[chan] =
946                             adm1031_read_value(client, ADM1031_REG_FAN_MIN(chan));
947                         data->fan[chan] =
948                             adm1031_read_value(client, ADM1031_REG_FAN_SPEED(chan));
949                         data->pwm[chan] =
950                             0xf & (adm1031_read_value(client, ADM1031_REG_PWM) >> 
951                                    (4*chan));
952                 }
953                 data->last_updated = jiffies;
954                 data->valid = 1;
955         }
956
957         up(&data->update_lock);
958
959         return data;
960 }
961
962 static int __init sensors_adm1031_init(void)
963 {
964         return i2c_add_driver(&adm1031_driver);
965 }
966
967 static void __exit sensors_adm1031_exit(void)
968 {
969         i2c_del_driver(&adm1031_driver);
970 }
971
972 MODULE_AUTHOR("Alexandre d'Alton <alex@alexdalton.org>");
973 MODULE_DESCRIPTION("ADM1031/ADM1030 driver");
974 MODULE_LICENSE("GPL");
975
976 module_init(sensors_adm1031_init);
977 module_exit(sensors_adm1031_exit);