[PATCH] hwmon: hwmon vs i2c, second round (06/11)
[linux-3.10.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/hwmon.h>
30 #include <linux/err.h>
31
32 /* Following macros takes channel parameter starting from 0 to 2 */
33 #define ADM1031_REG_FAN_SPEED(nr)       (0x08 + (nr))
34 #define ADM1031_REG_FAN_DIV(nr)         (0x20  + (nr))
35 #define ADM1031_REG_PWM                 (0x22)
36 #define ADM1031_REG_FAN_MIN(nr)         (0x10 + (nr))
37
38 #define ADM1031_REG_TEMP_MAX(nr)        (0x14  + 4*(nr))
39 #define ADM1031_REG_TEMP_MIN(nr)        (0x15  + 4*(nr))
40 #define ADM1031_REG_TEMP_CRIT(nr)       (0x16  + 4*(nr))
41
42 #define ADM1031_REG_TEMP(nr)            (0xa + (nr))
43 #define ADM1031_REG_AUTO_TEMP(nr)       (0x24 + (nr))
44
45 #define ADM1031_REG_STATUS(nr)          (0x2 + (nr))
46
47 #define ADM1031_REG_CONF1               0x0
48 #define ADM1031_REG_CONF2               0x1
49 #define ADM1031_REG_EXT_TEMP            0x6
50
51 #define ADM1031_CONF1_MONITOR_ENABLE    0x01    /* Monitoring enable */
52 #define ADM1031_CONF1_PWM_INVERT        0x08    /* PWM Invert */
53 #define ADM1031_CONF1_AUTO_MODE         0x80    /* Auto FAN */
54
55 #define ADM1031_CONF2_PWM1_ENABLE       0x01
56 #define ADM1031_CONF2_PWM2_ENABLE       0x02
57 #define ADM1031_CONF2_TACH1_ENABLE      0x04
58 #define ADM1031_CONF2_TACH2_ENABLE      0x08
59 #define ADM1031_CONF2_TEMP_ENABLE(chan) (0x10 << (chan))
60
61 /* Addresses to scan */
62 static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
63
64 /* Insmod parameters */
65 I2C_CLIENT_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 class_device *class_dev;
73         struct semaphore update_lock;
74         int chip_type;
75         char valid;             /* !=0 if following fields are valid */
76         unsigned long last_updated;     /* In jiffies */
77         /* The chan_select_table contains the possible configurations for
78          * auto fan control.
79          */
80         auto_chan_table_t *chan_select_table;
81         u16 alarm;
82         u8 conf1;
83         u8 conf2;
84         u8 fan[2];
85         u8 fan_div[2];
86         u8 fan_min[2];
87         u8 pwm[2];
88         u8 old_pwm[2];
89         s8 temp[3];
90         u8 ext_temp[3];
91         u8 auto_temp[3];
92         u8 auto_temp_min[3];
93         u8 auto_temp_off[3];
94         u8 auto_temp_max[3];
95         s8 temp_min[3];
96         s8 temp_max[3];
97         s8 temp_crit[3];
98 };
99
100 static int adm1031_attach_adapter(struct i2c_adapter *adapter);
101 static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind);
102 static void adm1031_init_client(struct i2c_client *client);
103 static int adm1031_detach_client(struct i2c_client *client);
104 static struct adm1031_data *adm1031_update_device(struct device *dev);
105
106 /* This is the driver that will be inserted */
107 static struct i2c_driver adm1031_driver = {
108         .owner = THIS_MODULE,
109         .name = "adm1031",
110         .flags = I2C_DF_NOTIFY,
111         .attach_adapter = adm1031_attach_adapter,
112         .detach_client = adm1031_detach_client,
113 };
114
115 static inline u8 adm1031_read_value(struct i2c_client *client, u8 reg)
116 {
117         return i2c_smbus_read_byte_data(client, reg);
118 }
119
120 static inline int
121 adm1031_write_value(struct i2c_client *client, u8 reg, unsigned int value)
122 {
123         return i2c_smbus_write_byte_data(client, reg, value);
124 }
125
126
127 #define TEMP_TO_REG(val)                (((val) < 0 ? ((val - 500) / 1000) : \
128                                         ((val + 500) / 1000)))
129
130 #define TEMP_FROM_REG(val)              ((val) * 1000)
131
132 #define TEMP_FROM_REG_EXT(val, ext)     (TEMP_FROM_REG(val) + (ext) * 125)
133
134 #define FAN_FROM_REG(reg, div)          ((reg) ? (11250 * 60) / ((reg) * (div)) : 0)
135
136 static int FAN_TO_REG(int reg, int div)
137 {
138         int tmp;
139         tmp = FAN_FROM_REG(SENSORS_LIMIT(reg, 0, 65535), div);
140         return tmp > 255 ? 255 : tmp;
141 }
142
143 #define FAN_DIV_FROM_REG(reg)           (1<<(((reg)&0xc0)>>6))
144
145 #define PWM_TO_REG(val)                 (SENSORS_LIMIT((val), 0, 255) >> 4)
146 #define PWM_FROM_REG(val)               ((val) << 4)
147
148 #define FAN_CHAN_FROM_REG(reg)          (((reg) >> 5) & 7)
149 #define FAN_CHAN_TO_REG(val, reg)       \
150         (((reg) & 0x1F) | (((val) << 5) & 0xe0))
151
152 #define AUTO_TEMP_MIN_TO_REG(val, reg)  \
153         ((((val)/500) & 0xf8)|((reg) & 0x7))
154 #define AUTO_TEMP_RANGE_FROM_REG(reg)   (5000 * (1<< ((reg)&0x7)))
155 #define AUTO_TEMP_MIN_FROM_REG(reg)     (1000 * ((((reg) >> 3) & 0x1f) << 2))
156
157 #define AUTO_TEMP_MIN_FROM_REG_DEG(reg) ((((reg) >> 3) & 0x1f) << 2)
158
159 #define AUTO_TEMP_OFF_FROM_REG(reg)             \
160         (AUTO_TEMP_MIN_FROM_REG(reg) - 5000)
161
162 #define AUTO_TEMP_MAX_FROM_REG(reg)             \
163         (AUTO_TEMP_RANGE_FROM_REG(reg) +        \
164         AUTO_TEMP_MIN_FROM_REG(reg))
165
166 static int AUTO_TEMP_MAX_TO_REG(int val, int reg, int pwm)
167 {
168         int ret;
169         int range = val - AUTO_TEMP_MIN_FROM_REG(reg);
170
171         range = ((val - AUTO_TEMP_MIN_FROM_REG(reg))*10)/(16 - pwm);
172         ret = ((reg & 0xf8) |
173                (range < 10000 ? 0 :
174                 range < 20000 ? 1 :
175                 range < 40000 ? 2 : range < 80000 ? 3 : 4));
176         return ret;
177 }
178
179 /* FAN auto control */
180 #define GET_FAN_AUTO_BITFIELD(data, idx)        \
181         (*(data)->chan_select_table)[FAN_CHAN_FROM_REG((data)->conf1)][idx%2]
182
183 /* The tables below contains the possible values for the auto fan 
184  * control bitfields. the index in the table is the register value.
185  * MSb is the auto fan control enable bit, so the four first entries
186  * in the table disables auto fan control when both bitfields are zero.
187  */
188 static auto_chan_table_t auto_channel_select_table_adm1031 = {
189         {0, 0}, {0, 0}, {0, 0}, {0, 0},
190         {2 /*0b010 */ , 4 /*0b100 */ },
191         {2 /*0b010 */ , 2 /*0b010 */ },
192         {4 /*0b100 */ , 4 /*0b100 */ },
193         {7 /*0b111 */ , 7 /*0b111 */ },
194 };
195
196 static auto_chan_table_t auto_channel_select_table_adm1030 = {
197         {0, 0}, {0, 0}, {0, 0}, {0, 0},
198         {2 /*0b10 */            , 0},
199         {0xff /*invalid */      , 0},
200         {0xff /*invalid */      , 0},
201         {3 /*0b11 */            , 0},
202 };
203
204 /* That function checks if a bitfield is valid and returns the other bitfield
205  * nearest match if no exact match where found.
206  */
207 static int
208 get_fan_auto_nearest(struct adm1031_data *data,
209                      int chan, u8 val, u8 reg, u8 * new_reg)
210 {
211         int i;
212         int first_match = -1, exact_match = -1;
213         u8 other_reg_val =
214             (*data->chan_select_table)[FAN_CHAN_FROM_REG(reg)][chan ? 0 : 1];
215
216         if (val == 0) {
217                 *new_reg = 0;
218                 return 0;
219         }
220
221         for (i = 0; i < 8; i++) {
222                 if ((val == (*data->chan_select_table)[i][chan]) &&
223                     ((*data->chan_select_table)[i][chan ? 0 : 1] ==
224                      other_reg_val)) {
225                         /* We found an exact match */
226                         exact_match = i;
227                         break;
228                 } else if (val == (*data->chan_select_table)[i][chan] &&
229                            first_match == -1) {
230                         /* Save the first match in case of an exact match has not been
231                          * found 
232                          */
233                         first_match = i;
234                 }
235         }
236
237         if (exact_match >= 0) {
238                 *new_reg = exact_match;
239         } else if (first_match >= 0) {
240                 *new_reg = first_match;
241         } else {
242                 return -EINVAL;
243         }
244         return 0;
245 }
246
247 static ssize_t show_fan_auto_channel(struct device *dev, char *buf, int nr)
248 {
249         struct adm1031_data *data = adm1031_update_device(dev);
250         return sprintf(buf, "%d\n", GET_FAN_AUTO_BITFIELD(data, nr));
251 }
252
253 static ssize_t
254 set_fan_auto_channel(struct device *dev, const char *buf, size_t count, int nr)
255 {
256         struct i2c_client *client = to_i2c_client(dev);
257         struct adm1031_data *data = i2c_get_clientdata(client);
258         int val = simple_strtol(buf, NULL, 10);
259         u8 reg;
260         int ret;
261         u8 old_fan_mode;
262
263         old_fan_mode = data->conf1;
264
265         down(&data->update_lock);
266         
267         if ((ret = get_fan_auto_nearest(data, nr, val, data->conf1, &reg))) {
268                 up(&data->update_lock);
269                 return ret;
270         }
271         if (((data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1)) & ADM1031_CONF1_AUTO_MODE) ^ 
272             (old_fan_mode & ADM1031_CONF1_AUTO_MODE)) {
273                 if (data->conf1 & ADM1031_CONF1_AUTO_MODE){
274                         /* Switch to Auto Fan Mode 
275                          * Save PWM registers 
276                          * Set PWM registers to 33% Both */
277                         data->old_pwm[0] = data->pwm[0];
278                         data->old_pwm[1] = data->pwm[1];
279                         adm1031_write_value(client, ADM1031_REG_PWM, 0x55);
280                 } else {
281                         /* Switch to Manual Mode */
282                         data->pwm[0] = data->old_pwm[0];
283                         data->pwm[1] = data->old_pwm[1];
284                         /* Restore PWM registers */
285                         adm1031_write_value(client, ADM1031_REG_PWM, 
286                                             data->pwm[0] | (data->pwm[1] << 4));
287                 }
288         }
289         data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1);
290         adm1031_write_value(client, ADM1031_REG_CONF1, data->conf1);
291         up(&data->update_lock);
292         return count;
293 }
294
295 #define fan_auto_channel_offset(offset)                                         \
296 static ssize_t show_fan_auto_channel_##offset (struct device *dev, struct device_attribute *attr, char *buf)    \
297 {                                                                               \
298         return show_fan_auto_channel(dev, buf, offset - 1);                     \
299 }                                                                               \
300 static ssize_t set_fan_auto_channel_##offset (struct device *dev, struct device_attribute *attr,                \
301         const char *buf, size_t count)                                          \
302 {                                                                               \
303         return set_fan_auto_channel(dev, buf, count, offset - 1);               \
304 }                                                                               \
305 static DEVICE_ATTR(auto_fan##offset##_channel, S_IRUGO | S_IWUSR,               \
306                    show_fan_auto_channel_##offset,                              \
307                    set_fan_auto_channel_##offset)
308
309 fan_auto_channel_offset(1);
310 fan_auto_channel_offset(2);
311
312 /* Auto Temps */
313 static ssize_t show_auto_temp_off(struct device *dev, char *buf, int nr)
314 {
315         struct adm1031_data *data = adm1031_update_device(dev);
316         return sprintf(buf, "%d\n", 
317                        AUTO_TEMP_OFF_FROM_REG(data->auto_temp[nr]));
318 }
319 static ssize_t show_auto_temp_min(struct device *dev, char *buf, int nr)
320 {
321         struct adm1031_data *data = adm1031_update_device(dev);
322         return sprintf(buf, "%d\n",
323                        AUTO_TEMP_MIN_FROM_REG(data->auto_temp[nr]));
324 }
325 static ssize_t
326 set_auto_temp_min(struct device *dev, const char *buf, size_t count, int nr)
327 {
328         struct i2c_client *client = to_i2c_client(dev);
329         struct adm1031_data *data = i2c_get_clientdata(client);
330         int val = simple_strtol(buf, NULL, 10);
331
332         down(&data->update_lock);
333         data->auto_temp[nr] = AUTO_TEMP_MIN_TO_REG(val, data->auto_temp[nr]);
334         adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
335                             data->auto_temp[nr]);
336         up(&data->update_lock);
337         return count;
338 }
339 static ssize_t show_auto_temp_max(struct device *dev, char *buf, int nr)
340 {
341         struct adm1031_data *data = adm1031_update_device(dev);
342         return sprintf(buf, "%d\n",
343                        AUTO_TEMP_MAX_FROM_REG(data->auto_temp[nr]));
344 }
345 static ssize_t
346 set_auto_temp_max(struct device *dev, const char *buf, size_t count, int nr)
347 {
348         struct i2c_client *client = to_i2c_client(dev);
349         struct adm1031_data *data = i2c_get_clientdata(client);
350         int val = simple_strtol(buf, NULL, 10);
351
352         down(&data->update_lock);
353         data->temp_max[nr] = AUTO_TEMP_MAX_TO_REG(val, data->auto_temp[nr], data->pwm[nr]);
354         adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
355                             data->temp_max[nr]);
356         up(&data->update_lock);
357         return count;
358 }
359
360 #define auto_temp_reg(offset)                                                   \
361 static ssize_t show_auto_temp_##offset##_off (struct device *dev, struct device_attribute *attr, char *buf)     \
362 {                                                                               \
363         return show_auto_temp_off(dev, buf, offset - 1);                        \
364 }                                                                               \
365 static ssize_t show_auto_temp_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf)     \
366 {                                                                               \
367         return show_auto_temp_min(dev, buf, offset - 1);                        \
368 }                                                                               \
369 static ssize_t show_auto_temp_##offset##_max (struct device *dev, struct device_attribute *attr, char *buf)     \
370 {                                                                               \
371         return show_auto_temp_max(dev, buf, offset - 1);                        \
372 }                                                                               \
373 static ssize_t set_auto_temp_##offset##_min (struct device *dev, struct device_attribute *attr,         \
374                                              const char *buf, size_t count)     \
375 {                                                                               \
376         return set_auto_temp_min(dev, buf, count, offset - 1);          \
377 }                                                                               \
378 static ssize_t set_auto_temp_##offset##_max (struct device *dev, struct device_attribute *attr,         \
379                                              const char *buf, size_t count)     \
380 {                                                                               \
381         return set_auto_temp_max(dev, buf, count, offset - 1);          \
382 }                                                                               \
383 static DEVICE_ATTR(auto_temp##offset##_off, S_IRUGO,                            \
384                    show_auto_temp_##offset##_off, NULL);                        \
385 static DEVICE_ATTR(auto_temp##offset##_min, S_IRUGO | S_IWUSR,                  \
386                    show_auto_temp_##offset##_min, set_auto_temp_##offset##_min);\
387 static DEVICE_ATTR(auto_temp##offset##_max, S_IRUGO | S_IWUSR,                  \
388                    show_auto_temp_##offset##_max, set_auto_temp_##offset##_max)
389
390 auto_temp_reg(1);
391 auto_temp_reg(2);
392 auto_temp_reg(3);
393
394 /* pwm */
395 static ssize_t show_pwm(struct device *dev, char *buf, int nr)
396 {
397         struct adm1031_data *data = adm1031_update_device(dev);
398         return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
399 }
400 static ssize_t
401 set_pwm(struct device *dev, const char *buf, size_t count, int nr)
402 {
403         struct i2c_client *client = to_i2c_client(dev);
404         struct adm1031_data *data = i2c_get_clientdata(client);
405         int val = simple_strtol(buf, NULL, 10);
406         int reg;
407
408         down(&data->update_lock);
409         if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) && 
410             (((val>>4) & 0xf) != 5)) {
411                 /* In automatic mode, the only PWM accepted is 33% */
412                 up(&data->update_lock);
413                 return -EINVAL;
414         }
415         data->pwm[nr] = PWM_TO_REG(val);
416         reg = adm1031_read_value(client, ADM1031_REG_PWM);
417         adm1031_write_value(client, ADM1031_REG_PWM,
418                             nr ? ((data->pwm[nr] << 4) & 0xf0) | (reg & 0xf)
419                             : (data->pwm[nr] & 0xf) | (reg & 0xf0));
420         up(&data->update_lock);
421         return count;
422 }
423
424 #define pwm_reg(offset)                                                 \
425 static ssize_t show_pwm_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
426 {                                                                       \
427         return show_pwm(dev, buf, offset - 1);                  \
428 }                                                                       \
429 static ssize_t set_pwm_##offset (struct device *dev, struct device_attribute *attr,                     \
430                                  const char *buf, size_t count)         \
431 {                                                                       \
432         return set_pwm(dev, buf, count, offset - 1);            \
433 }                                                                       \
434 static DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR,                      \
435                    show_pwm_##offset, set_pwm_##offset)
436
437 pwm_reg(1);
438 pwm_reg(2);
439
440 /* Fans */
441
442 /*
443  * That function checks the cases where the fan reading is not
444  * relevant.  It is used to provide 0 as fan reading when the fan is
445  * not supposed to run
446  */
447 static int trust_fan_readings(struct adm1031_data *data, int chan)
448 {
449         int res = 0;
450
451         if (data->conf1 & ADM1031_CONF1_AUTO_MODE) {
452                 switch (data->conf1 & 0x60) {
453                 case 0x00:      /* remote temp1 controls fan1 remote temp2 controls fan2 */
454                         res = data->temp[chan+1] >=
455                               AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[chan+1]);
456                         break;
457                 case 0x20:      /* remote temp1 controls both fans */
458                         res =
459                             data->temp[1] >=
460                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1]);
461                         break;
462                 case 0x40:      /* remote temp2 controls both fans */
463                         res =
464                             data->temp[2] >=
465                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]);
466                         break;
467                 case 0x60:      /* max controls both fans */
468                         res =
469                             data->temp[0] >=
470                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[0])
471                             || data->temp[1] >=
472                             AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1])
473                             || (data->chip_type == adm1031 
474                                 && data->temp[2] >=
475                                 AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]));
476                         break;
477                 }
478         } else {
479                 res = data->pwm[chan] > 0;
480         }
481         return res;
482 }
483
484
485 static ssize_t show_fan(struct device *dev, char *buf, int nr)
486 {
487         struct adm1031_data *data = adm1031_update_device(dev);
488         int value;
489
490         value = trust_fan_readings(data, nr) ? FAN_FROM_REG(data->fan[nr],
491                                  FAN_DIV_FROM_REG(data->fan_div[nr])) : 0;
492         return sprintf(buf, "%d\n", value);
493 }
494
495 static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
496 {
497         struct adm1031_data *data = adm1031_update_device(dev);
498         return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[nr]));
499 }
500 static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
501 {
502         struct adm1031_data *data = adm1031_update_device(dev);
503         return sprintf(buf, "%d\n",
504                        FAN_FROM_REG(data->fan_min[nr],
505                                     FAN_DIV_FROM_REG(data->fan_div[nr])));
506 }
507 static ssize_t
508 set_fan_min(struct device *dev, const char *buf, size_t count, int nr)
509 {
510         struct i2c_client *client = to_i2c_client(dev);
511         struct adm1031_data *data = i2c_get_clientdata(client);
512         int val = simple_strtol(buf, NULL, 10);
513
514         down(&data->update_lock);
515         if (val) {
516                 data->fan_min[nr] = 
517                         FAN_TO_REG(val, FAN_DIV_FROM_REG(data->fan_div[nr]));
518         } else {
519                 data->fan_min[nr] = 0xff;
520         }
521         adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), data->fan_min[nr]);
522         up(&data->update_lock);
523         return count;
524 }
525 static ssize_t
526 set_fan_div(struct device *dev, const char *buf, size_t count, int nr)
527 {
528         struct i2c_client *client = to_i2c_client(dev);
529         struct adm1031_data *data = i2c_get_clientdata(client);
530         int val = simple_strtol(buf, NULL, 10);
531         u8 tmp;
532         int old_div;
533         int new_min;
534
535         tmp = val == 8 ? 0xc0 :
536               val == 4 ? 0x80 :
537               val == 2 ? 0x40 : 
538               val == 1 ? 0x00 :  
539               0xff;
540         if (tmp == 0xff)
541                 return -EINVAL;
542         
543         down(&data->update_lock);
544         old_div = FAN_DIV_FROM_REG(data->fan_div[nr]);
545         data->fan_div[nr] = (tmp & 0xC0) | (0x3f & data->fan_div[nr]);
546         new_min = data->fan_min[nr] * old_div / 
547                 FAN_DIV_FROM_REG(data->fan_div[nr]);
548         data->fan_min[nr] = new_min > 0xff ? 0xff : new_min;
549         data->fan[nr] = data->fan[nr] * old_div / 
550                 FAN_DIV_FROM_REG(data->fan_div[nr]);
551
552         adm1031_write_value(client, ADM1031_REG_FAN_DIV(nr), 
553                             data->fan_div[nr]);
554         adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), 
555                             data->fan_min[nr]);
556         up(&data->update_lock);
557         return count;
558 }
559
560 #define fan_offset(offset)                                              \
561 static ssize_t show_fan_##offset (struct device *dev, struct device_attribute *attr, char *buf) \
562 {                                                                       \
563         return show_fan(dev, buf, offset - 1);                  \
564 }                                                                       \
565 static ssize_t show_fan_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf)   \
566 {                                                                       \
567         return show_fan_min(dev, buf, offset - 1);                      \
568 }                                                                       \
569 static ssize_t show_fan_##offset##_div (struct device *dev, struct device_attribute *attr, char *buf)   \
570 {                                                                       \
571         return show_fan_div(dev, buf, offset - 1);                      \
572 }                                                                       \
573 static ssize_t set_fan_##offset##_min (struct device *dev, struct device_attribute *attr,               \
574         const char *buf, size_t count)                                  \
575 {                                                                       \
576         return set_fan_min(dev, buf, count, offset - 1);                \
577 }                                                                       \
578 static ssize_t set_fan_##offset##_div (struct device *dev, struct device_attribute *attr,               \
579         const char *buf, size_t count)                                  \
580 {                                                                       \
581         return set_fan_div(dev, buf, count, offset - 1);                \
582 }                                                                       \
583 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset,     \
584                    NULL);                                               \
585 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR,                \
586                    show_fan_##offset##_min, set_fan_##offset##_min);    \
587 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR,                \
588                    show_fan_##offset##_div, set_fan_##offset##_div);    \
589 static DEVICE_ATTR(auto_fan##offset##_min_pwm, S_IRUGO | S_IWUSR,       \
590                    show_pwm_##offset, set_pwm_##offset)
591
592 fan_offset(1);
593 fan_offset(2);
594
595
596 /* Temps */
597 static ssize_t show_temp(struct device *dev, char *buf, int nr)
598 {
599         struct adm1031_data *data = adm1031_update_device(dev);
600         int ext;
601         ext = nr == 0 ?
602             ((data->ext_temp[nr] >> 6) & 0x3) * 2 :
603             (((data->ext_temp[nr] >> ((nr - 1) * 3)) & 7));
604         return sprintf(buf, "%d\n", TEMP_FROM_REG_EXT(data->temp[nr], ext));
605 }
606 static ssize_t show_temp_min(struct device *dev, char *buf, int nr)
607 {
608         struct adm1031_data *data = adm1031_update_device(dev);
609         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
610 }
611 static ssize_t show_temp_max(struct device *dev, char *buf, int nr)
612 {
613         struct adm1031_data *data = adm1031_update_device(dev);
614         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
615 }
616 static ssize_t show_temp_crit(struct device *dev, char *buf, int nr)
617 {
618         struct adm1031_data *data = adm1031_update_device(dev);
619         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit[nr]));
620 }
621 static ssize_t
622 set_temp_min(struct device *dev, const char *buf, size_t count, int nr)
623 {
624         struct i2c_client *client = to_i2c_client(dev);
625         struct adm1031_data *data = i2c_get_clientdata(client);
626         int val;
627
628         val = simple_strtol(buf, NULL, 10);
629         val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
630         down(&data->update_lock);
631         data->temp_min[nr] = TEMP_TO_REG(val);
632         adm1031_write_value(client, ADM1031_REG_TEMP_MIN(nr),
633                             data->temp_min[nr]);
634         up(&data->update_lock);
635         return count;
636 }
637 static ssize_t
638 set_temp_max(struct device *dev, const char *buf, size_t count, int nr)
639 {
640         struct i2c_client *client = to_i2c_client(dev);
641         struct adm1031_data *data = i2c_get_clientdata(client);
642         int val;
643
644         val = simple_strtol(buf, NULL, 10);
645         val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
646         down(&data->update_lock);
647         data->temp_max[nr] = TEMP_TO_REG(val);
648         adm1031_write_value(client, ADM1031_REG_TEMP_MAX(nr),
649                             data->temp_max[nr]);
650         up(&data->update_lock);
651         return count;
652 }
653 static ssize_t
654 set_temp_crit(struct device *dev, const char *buf, size_t count, int nr)
655 {
656         struct i2c_client *client = to_i2c_client(dev);
657         struct adm1031_data *data = i2c_get_clientdata(client);
658         int val;
659
660         val = simple_strtol(buf, NULL, 10);
661         val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
662         down(&data->update_lock);
663         data->temp_crit[nr] = TEMP_TO_REG(val);
664         adm1031_write_value(client, ADM1031_REG_TEMP_CRIT(nr),
665                             data->temp_crit[nr]);
666         up(&data->update_lock);
667         return count;
668 }
669
670 #define temp_reg(offset)                                                        \
671 static ssize_t show_temp_##offset (struct device *dev, struct device_attribute *attr, char *buf)                \
672 {                                                                               \
673         return show_temp(dev, buf, offset - 1);                         \
674 }                                                                               \
675 static ssize_t show_temp_##offset##_min (struct device *dev, struct device_attribute *attr, char *buf)          \
676 {                                                                               \
677         return show_temp_min(dev, buf, offset - 1);                             \
678 }                                                                               \
679 static ssize_t show_temp_##offset##_max (struct device *dev, struct device_attribute *attr, char *buf)          \
680 {                                                                               \
681         return show_temp_max(dev, buf, offset - 1);                             \
682 }                                                                               \
683 static ssize_t show_temp_##offset##_crit (struct device *dev, struct device_attribute *attr, char *buf) \
684 {                                                                               \
685         return show_temp_crit(dev, buf, offset - 1);                    \
686 }                                                                               \
687 static ssize_t set_temp_##offset##_min (struct device *dev, struct device_attribute *attr,                      \
688                                         const char *buf, size_t count)          \
689 {                                                                               \
690         return set_temp_min(dev, buf, count, offset - 1);                       \
691 }                                                                               \
692 static ssize_t set_temp_##offset##_max (struct device *dev, struct device_attribute *attr,                      \
693                                         const char *buf, size_t count)          \
694 {                                                                               \
695         return set_temp_max(dev, buf, count, offset - 1);                       \
696 }                                                                               \
697 static ssize_t set_temp_##offset##_crit (struct device *dev, struct device_attribute *attr,                     \
698                                          const char *buf, size_t count)         \
699 {                                                                               \
700         return set_temp_crit(dev, buf, count, offset - 1);                      \
701 }                                                                               \
702 static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset,           \
703                    NULL);                                                       \
704 static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,                       \
705                    show_temp_##offset##_min, set_temp_##offset##_min);          \
706 static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,                       \
707                    show_temp_##offset##_max, set_temp_##offset##_max);          \
708 static DEVICE_ATTR(temp##offset##_crit, S_IRUGO | S_IWUSR,                      \
709                    show_temp_##offset##_crit, set_temp_##offset##_crit)
710
711 temp_reg(1);
712 temp_reg(2);
713 temp_reg(3);
714
715 /* Alarms */
716 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
717 {
718         struct adm1031_data *data = adm1031_update_device(dev);
719         return sprintf(buf, "%d\n", data->alarm);
720 }
721
722 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
723
724
725 static int adm1031_attach_adapter(struct i2c_adapter *adapter)
726 {
727         if (!(adapter->class & I2C_CLASS_HWMON))
728                 return 0;
729         return i2c_probe(adapter, &addr_data, adm1031_detect);
730 }
731
732 /* This function is called by i2c_probe */
733 static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind)
734 {
735         struct i2c_client *new_client;
736         struct adm1031_data *data;
737         int err = 0;
738         const char *name = "";
739
740         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
741                 goto exit;
742
743         if (!(data = kmalloc(sizeof(struct adm1031_data), GFP_KERNEL))) {
744                 err = -ENOMEM;
745                 goto exit;
746         }
747         memset(data, 0, sizeof(struct adm1031_data));
748
749         new_client = &data->client;
750         i2c_set_clientdata(new_client, data);
751         new_client->addr = address;
752         new_client->adapter = adapter;
753         new_client->driver = &adm1031_driver;
754         new_client->flags = 0;
755
756         if (kind < 0) {
757                 int id, co;
758                 id = i2c_smbus_read_byte_data(new_client, 0x3d);
759                 co = i2c_smbus_read_byte_data(new_client, 0x3e);
760
761                 if (!((id == 0x31 || id == 0x30) && co == 0x41))
762                         goto exit_free;
763                 kind = (id == 0x30) ? adm1030 : adm1031;
764         }
765
766         if (kind <= 0)
767                 kind = adm1031;
768
769         /* Given the detected chip type, set the chip name and the
770          * auto fan control helper table. */
771         if (kind == adm1030) {
772                 name = "adm1030";
773                 data->chan_select_table = &auto_channel_select_table_adm1030;
774         } else if (kind == adm1031) {
775                 name = "adm1031";
776                 data->chan_select_table = &auto_channel_select_table_adm1031;
777         }
778         data->chip_type = kind;
779
780         strlcpy(new_client->name, name, I2C_NAME_SIZE);
781         data->valid = 0;
782         init_MUTEX(&data->update_lock);
783
784         /* Tell the I2C layer a new client has arrived */
785         if ((err = i2c_attach_client(new_client)))
786                 goto exit_free;
787
788         /* Initialize the ADM1031 chip */
789         adm1031_init_client(new_client);
790
791         /* Register sysfs hooks */
792         data->class_dev = hwmon_device_register(&new_client->dev);
793         if (IS_ERR(data->class_dev)) {
794                 err = PTR_ERR(data->class_dev);
795                 goto exit_detach;
796         }
797
798         device_create_file(&new_client->dev, &dev_attr_fan1_input);
799         device_create_file(&new_client->dev, &dev_attr_fan1_div);
800         device_create_file(&new_client->dev, &dev_attr_fan1_min);
801         device_create_file(&new_client->dev, &dev_attr_pwm1);
802         device_create_file(&new_client->dev, &dev_attr_auto_fan1_channel);
803         device_create_file(&new_client->dev, &dev_attr_temp1_input);
804         device_create_file(&new_client->dev, &dev_attr_temp1_min);
805         device_create_file(&new_client->dev, &dev_attr_temp1_max);
806         device_create_file(&new_client->dev, &dev_attr_temp1_crit);
807         device_create_file(&new_client->dev, &dev_attr_temp2_input);
808         device_create_file(&new_client->dev, &dev_attr_temp2_min);
809         device_create_file(&new_client->dev, &dev_attr_temp2_max);
810         device_create_file(&new_client->dev, &dev_attr_temp2_crit);
811
812         device_create_file(&new_client->dev, &dev_attr_auto_temp1_off);
813         device_create_file(&new_client->dev, &dev_attr_auto_temp1_min);
814         device_create_file(&new_client->dev, &dev_attr_auto_temp1_max);
815
816         device_create_file(&new_client->dev, &dev_attr_auto_temp2_off);
817         device_create_file(&new_client->dev, &dev_attr_auto_temp2_min);
818         device_create_file(&new_client->dev, &dev_attr_auto_temp2_max);
819
820         device_create_file(&new_client->dev, &dev_attr_auto_fan1_min_pwm);
821
822         device_create_file(&new_client->dev, &dev_attr_alarms);
823
824         if (kind == adm1031) {
825                 device_create_file(&new_client->dev, &dev_attr_fan2_input);
826                 device_create_file(&new_client->dev, &dev_attr_fan2_div);
827                 device_create_file(&new_client->dev, &dev_attr_fan2_min);
828                 device_create_file(&new_client->dev, &dev_attr_pwm2);
829                 device_create_file(&new_client->dev,
830                                    &dev_attr_auto_fan2_channel);
831                 device_create_file(&new_client->dev, &dev_attr_temp3_input);
832                 device_create_file(&new_client->dev, &dev_attr_temp3_min);
833                 device_create_file(&new_client->dev, &dev_attr_temp3_max);
834                 device_create_file(&new_client->dev, &dev_attr_temp3_crit);
835                 device_create_file(&new_client->dev, &dev_attr_auto_temp3_off);
836                 device_create_file(&new_client->dev, &dev_attr_auto_temp3_min);
837                 device_create_file(&new_client->dev, &dev_attr_auto_temp3_max);
838                 device_create_file(&new_client->dev, &dev_attr_auto_fan2_min_pwm);
839         }
840
841         return 0;
842
843 exit_detach:
844         i2c_detach_client(new_client);
845 exit_free:
846         kfree(data);
847 exit:
848         return err;
849 }
850
851 static int adm1031_detach_client(struct i2c_client *client)
852 {
853         struct adm1031_data *data = i2c_get_clientdata(client);
854         int ret;
855
856         hwmon_device_unregister(data->class_dev);
857         if ((ret = i2c_detach_client(client)) != 0) {
858                 return ret;
859         }
860         kfree(data);
861         return 0;
862 }
863
864 static void adm1031_init_client(struct i2c_client *client)
865 {
866         unsigned int read_val;
867         unsigned int mask;
868         struct adm1031_data *data = i2c_get_clientdata(client);
869
870         mask = (ADM1031_CONF2_PWM1_ENABLE | ADM1031_CONF2_TACH1_ENABLE);
871         if (data->chip_type == adm1031) {
872                 mask |= (ADM1031_CONF2_PWM2_ENABLE |
873                         ADM1031_CONF2_TACH2_ENABLE);
874         } 
875         /* Initialize the ADM1031 chip (enables fan speed reading ) */
876         read_val = adm1031_read_value(client, ADM1031_REG_CONF2);
877         if ((read_val | mask) != read_val) {
878             adm1031_write_value(client, ADM1031_REG_CONF2, read_val | mask);
879         }
880
881         read_val = adm1031_read_value(client, ADM1031_REG_CONF1);
882         if ((read_val | ADM1031_CONF1_MONITOR_ENABLE) != read_val) {
883             adm1031_write_value(client, ADM1031_REG_CONF1, read_val |
884                                 ADM1031_CONF1_MONITOR_ENABLE);
885         }
886
887 }
888
889 static struct adm1031_data *adm1031_update_device(struct device *dev)
890 {
891         struct i2c_client *client = to_i2c_client(dev);
892         struct adm1031_data *data = i2c_get_clientdata(client);
893         int chan;
894
895         down(&data->update_lock);
896
897         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
898             || !data->valid) {
899
900                 dev_dbg(&client->dev, "Starting adm1031 update\n");
901                 for (chan = 0;
902                      chan < ((data->chip_type == adm1031) ? 3 : 2); chan++) {
903                         u8 oldh, newh;
904
905                         oldh =
906                             adm1031_read_value(client, ADM1031_REG_TEMP(chan));
907                         data->ext_temp[chan] =
908                             adm1031_read_value(client, ADM1031_REG_EXT_TEMP);
909                         newh =
910                             adm1031_read_value(client, ADM1031_REG_TEMP(chan));
911                         if (newh != oldh) {
912                                 data->ext_temp[chan] =
913                                     adm1031_read_value(client,
914                                                        ADM1031_REG_EXT_TEMP);
915 #ifdef DEBUG
916                                 oldh =
917                                     adm1031_read_value(client,
918                                                        ADM1031_REG_TEMP(chan));
919
920                                 /* oldh is actually newer */
921                                 if (newh != oldh)
922                                         dev_warn(&client->dev,
923                                                  "Remote temperature may be "
924                                                  "wrong.\n");
925 #endif
926                         }
927                         data->temp[chan] = newh;
928
929                         data->temp_min[chan] =
930                             adm1031_read_value(client,
931                                                ADM1031_REG_TEMP_MIN(chan));
932                         data->temp_max[chan] =
933                             adm1031_read_value(client,
934                                                ADM1031_REG_TEMP_MAX(chan));
935                         data->temp_crit[chan] =
936                             adm1031_read_value(client,
937                                                ADM1031_REG_TEMP_CRIT(chan));
938                         data->auto_temp[chan] =
939                             adm1031_read_value(client,
940                                                ADM1031_REG_AUTO_TEMP(chan));
941
942                 }
943
944                 data->conf1 = adm1031_read_value(client, ADM1031_REG_CONF1);
945                 data->conf2 = adm1031_read_value(client, ADM1031_REG_CONF2);
946
947                 data->alarm = adm1031_read_value(client, ADM1031_REG_STATUS(0))
948                              | (adm1031_read_value(client, ADM1031_REG_STATUS(1))
949                                 << 8);
950                 if (data->chip_type == adm1030) {
951                         data->alarm &= 0xc0ff;
952                 }
953                 
954                 for (chan=0; chan<(data->chip_type == adm1030 ? 1 : 2); chan++) {
955                         data->fan_div[chan] =
956                             adm1031_read_value(client, ADM1031_REG_FAN_DIV(chan));
957                         data->fan_min[chan] =
958                             adm1031_read_value(client, ADM1031_REG_FAN_MIN(chan));
959                         data->fan[chan] =
960                             adm1031_read_value(client, ADM1031_REG_FAN_SPEED(chan));
961                         data->pwm[chan] =
962                             0xf & (adm1031_read_value(client, ADM1031_REG_PWM) >> 
963                                    (4*chan));
964                 }
965                 data->last_updated = jiffies;
966                 data->valid = 1;
967         }
968
969         up(&data->update_lock);
970
971         return data;
972 }
973
974 static int __init sensors_adm1031_init(void)
975 {
976         return i2c_add_driver(&adm1031_driver);
977 }
978
979 static void __exit sensors_adm1031_exit(void)
980 {
981         i2c_del_driver(&adm1031_driver);
982 }
983
984 MODULE_AUTHOR("Alexandre d'Alton <alex@alexdalton.org>");
985 MODULE_DESCRIPTION("ADM1031/ADM1030 driver");
986 MODULE_LICENSE("GPL");
987
988 module_init(sensors_adm1031_init);
989 module_exit(sensors_adm1031_exit);