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24#include <linux/kernel.h>
25#include <linux/module.h>
26#include <linux/init.h>
27#include <linux/slab.h>
28#include <linux/jiffies.h>
29#include <linux/i2c.h>
30#include <linux/hwmon.h>
31#include <linux/hwmon-sysfs.h>
32#include <linux/err.h>
33#include <linux/mutex.h>
34
35
36
37
38
39static const unsigned short normal_i2c[] = {0x18, 0x19, 0x1a, 0x2c, 0x2d, 0x2e,
40 0x4c, 0x4d, 0x4e, I2C_CLIENT_END};
41
42
43
44
45
46static int pwminv;
47module_param(pwminv, int, S_IRUGO);
48
49static int init = 1;
50module_param(init, int, S_IRUGO);
51
52enum chips { amc6821 };
53
54#define AMC6821_REG_DEV_ID 0x3D
55#define AMC6821_REG_COMP_ID 0x3E
56#define AMC6821_REG_CONF1 0x00
57#define AMC6821_REG_CONF2 0x01
58#define AMC6821_REG_CONF3 0x3F
59#define AMC6821_REG_CONF4 0x04
60#define AMC6821_REG_STAT1 0x02
61#define AMC6821_REG_STAT2 0x03
62#define AMC6821_REG_TDATA_LOW 0x08
63#define AMC6821_REG_TDATA_HI 0x09
64#define AMC6821_REG_LTEMP_HI 0x0A
65#define AMC6821_REG_RTEMP_HI 0x0B
66#define AMC6821_REG_LTEMP_LIMIT_MIN 0x15
67#define AMC6821_REG_LTEMP_LIMIT_MAX 0x14
68#define AMC6821_REG_RTEMP_LIMIT_MIN 0x19
69#define AMC6821_REG_RTEMP_LIMIT_MAX 0x18
70#define AMC6821_REG_LTEMP_CRIT 0x1B
71#define AMC6821_REG_RTEMP_CRIT 0x1D
72#define AMC6821_REG_PSV_TEMP 0x1C
73#define AMC6821_REG_DCY 0x22
74#define AMC6821_REG_LTEMP_FAN_CTRL 0x24
75#define AMC6821_REG_RTEMP_FAN_CTRL 0x25
76#define AMC6821_REG_DCY_LOW_TEMP 0x21
77
78#define AMC6821_REG_TACH_LLIMITL 0x10
79#define AMC6821_REG_TACH_LLIMITH 0x11
80#define AMC6821_REG_TACH_HLIMITL 0x12
81#define AMC6821_REG_TACH_HLIMITH 0x13
82
83#define AMC6821_CONF1_START 0x01
84#define AMC6821_CONF1_FAN_INT_EN 0x02
85#define AMC6821_CONF1_FANIE 0x04
86#define AMC6821_CONF1_PWMINV 0x08
87#define AMC6821_CONF1_FAN_FAULT_EN 0x10
88#define AMC6821_CONF1_FDRC0 0x20
89#define AMC6821_CONF1_FDRC1 0x40
90#define AMC6821_CONF1_THERMOVIE 0x80
91
92#define AMC6821_CONF2_PWM_EN 0x01
93#define AMC6821_CONF2_TACH_MODE 0x02
94#define AMC6821_CONF2_TACH_EN 0x04
95#define AMC6821_CONF2_RTFIE 0x08
96#define AMC6821_CONF2_LTOIE 0x10
97#define AMC6821_CONF2_RTOIE 0x20
98#define AMC6821_CONF2_PSVIE 0x40
99#define AMC6821_CONF2_RST 0x80
100
101#define AMC6821_CONF3_THERM_FAN_EN 0x80
102#define AMC6821_CONF3_REV_MASK 0x0F
103
104#define AMC6821_CONF4_OVREN 0x10
105#define AMC6821_CONF4_TACH_FAST 0x20
106#define AMC6821_CONF4_PSPR 0x40
107#define AMC6821_CONF4_MODE 0x80
108
109#define AMC6821_STAT1_RPM_ALARM 0x01
110#define AMC6821_STAT1_FANS 0x02
111#define AMC6821_STAT1_RTH 0x04
112#define AMC6821_STAT1_RTL 0x08
113#define AMC6821_STAT1_R_THERM 0x10
114#define AMC6821_STAT1_RTF 0x20
115#define AMC6821_STAT1_LTH 0x40
116#define AMC6821_STAT1_LTL 0x80
117
118#define AMC6821_STAT2_RTC 0x08
119#define AMC6821_STAT2_LTC 0x10
120#define AMC6821_STAT2_LPSV 0x20
121#define AMC6821_STAT2_L_THERM 0x40
122#define AMC6821_STAT2_THERM_IN 0x80
123
124enum {IDX_TEMP1_INPUT = 0, IDX_TEMP1_MIN, IDX_TEMP1_MAX,
125 IDX_TEMP1_CRIT, IDX_TEMP2_INPUT, IDX_TEMP2_MIN,
126 IDX_TEMP2_MAX, IDX_TEMP2_CRIT,
127 TEMP_IDX_LEN, };
128
129static const u8 temp_reg[] = {AMC6821_REG_LTEMP_HI,
130 AMC6821_REG_LTEMP_LIMIT_MIN,
131 AMC6821_REG_LTEMP_LIMIT_MAX,
132 AMC6821_REG_LTEMP_CRIT,
133 AMC6821_REG_RTEMP_HI,
134 AMC6821_REG_RTEMP_LIMIT_MIN,
135 AMC6821_REG_RTEMP_LIMIT_MAX,
136 AMC6821_REG_RTEMP_CRIT, };
137
138enum {IDX_FAN1_INPUT = 0, IDX_FAN1_MIN, IDX_FAN1_MAX,
139 FAN1_IDX_LEN, };
140
141static const u8 fan_reg_low[] = {AMC6821_REG_TDATA_LOW,
142 AMC6821_REG_TACH_LLIMITL,
143 AMC6821_REG_TACH_HLIMITL, };
144
145
146static const u8 fan_reg_hi[] = {AMC6821_REG_TDATA_HI,
147 AMC6821_REG_TACH_LLIMITH,
148 AMC6821_REG_TACH_HLIMITH, };
149
150
151
152
153
154struct amc6821_data {
155 struct i2c_client *client;
156 struct mutex update_lock;
157 char valid;
158 unsigned long last_updated;
159
160
161 int temp[TEMP_IDX_LEN];
162
163 u16 fan[FAN1_IDX_LEN];
164 u8 fan1_div;
165
166 u8 pwm1;
167 u8 temp1_auto_point_temp[3];
168 u8 temp2_auto_point_temp[3];
169 u8 pwm1_auto_point_pwm[3];
170 u8 pwm1_enable;
171 u8 pwm1_auto_channels_temp;
172
173 u8 stat1;
174 u8 stat2;
175};
176
177static struct amc6821_data *amc6821_update_device(struct device *dev)
178{
179 struct amc6821_data *data = dev_get_drvdata(dev);
180 struct i2c_client *client = data->client;
181 int timeout = HZ;
182 u8 reg;
183 int i;
184
185 mutex_lock(&data->update_lock);
186
187 if (time_after(jiffies, data->last_updated + timeout) ||
188 !data->valid) {
189
190 for (i = 0; i < TEMP_IDX_LEN; i++)
191 data->temp[i] = i2c_smbus_read_byte_data(client,
192 temp_reg[i]);
193
194 data->stat1 = i2c_smbus_read_byte_data(client,
195 AMC6821_REG_STAT1);
196 data->stat2 = i2c_smbus_read_byte_data(client,
197 AMC6821_REG_STAT2);
198
199 data->pwm1 = i2c_smbus_read_byte_data(client,
200 AMC6821_REG_DCY);
201 for (i = 0; i < FAN1_IDX_LEN; i++) {
202 data->fan[i] = i2c_smbus_read_byte_data(
203 client,
204 fan_reg_low[i]);
205 data->fan[i] += i2c_smbus_read_byte_data(
206 client,
207 fan_reg_hi[i]) << 8;
208 }
209 data->fan1_div = i2c_smbus_read_byte_data(client,
210 AMC6821_REG_CONF4);
211 data->fan1_div = data->fan1_div & AMC6821_CONF4_PSPR ? 4 : 2;
212
213 data->pwm1_auto_point_pwm[0] = 0;
214 data->pwm1_auto_point_pwm[2] = 255;
215 data->pwm1_auto_point_pwm[1] = i2c_smbus_read_byte_data(client,
216 AMC6821_REG_DCY_LOW_TEMP);
217
218 data->temp1_auto_point_temp[0] =
219 i2c_smbus_read_byte_data(client,
220 AMC6821_REG_PSV_TEMP);
221 data->temp2_auto_point_temp[0] =
222 data->temp1_auto_point_temp[0];
223 reg = i2c_smbus_read_byte_data(client,
224 AMC6821_REG_LTEMP_FAN_CTRL);
225 data->temp1_auto_point_temp[1] = (reg & 0xF8) >> 1;
226 reg &= 0x07;
227 reg = 0x20 >> reg;
228 if (reg > 0)
229 data->temp1_auto_point_temp[2] =
230 data->temp1_auto_point_temp[1] +
231 (data->pwm1_auto_point_pwm[2] -
232 data->pwm1_auto_point_pwm[1]) / reg;
233 else
234 data->temp1_auto_point_temp[2] = 255;
235
236 reg = i2c_smbus_read_byte_data(client,
237 AMC6821_REG_RTEMP_FAN_CTRL);
238 data->temp2_auto_point_temp[1] = (reg & 0xF8) >> 1;
239 reg &= 0x07;
240 reg = 0x20 >> reg;
241 if (reg > 0)
242 data->temp2_auto_point_temp[2] =
243 data->temp2_auto_point_temp[1] +
244 (data->pwm1_auto_point_pwm[2] -
245 data->pwm1_auto_point_pwm[1]) / reg;
246 else
247 data->temp2_auto_point_temp[2] = 255;
248
249 reg = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1);
250 reg = (reg >> 5) & 0x3;
251 switch (reg) {
252 case 0:
253 data->pwm1_auto_channels_temp = 0;
254 data->pwm1_enable = 1;
255 break;
256 case 2:
257 data->pwm1_auto_channels_temp = 2;
258 data->pwm1_enable = 2;
259 break;
260 case 3:
261 data->pwm1_auto_channels_temp = 3;
262 data->pwm1_enable = 3;
263 break;
264 case 1:
265
266
267
268 data->pwm1_auto_channels_temp = 0;
269 data->pwm1_enable = 0;
270 break;
271 }
272
273 data->last_updated = jiffies;
274 data->valid = 1;
275 }
276 mutex_unlock(&data->update_lock);
277 return data;
278}
279
280static ssize_t get_temp(
281 struct device *dev,
282 struct device_attribute *devattr,
283 char *buf)
284{
285 struct amc6821_data *data = amc6821_update_device(dev);
286 int ix = to_sensor_dev_attr(devattr)->index;
287
288 return sprintf(buf, "%d\n", data->temp[ix] * 1000);
289}
290
291static ssize_t set_temp(
292 struct device *dev,
293 struct device_attribute *attr,
294 const char *buf,
295 size_t count)
296{
297 struct amc6821_data *data = dev_get_drvdata(dev);
298 struct i2c_client *client = data->client;
299 int ix = to_sensor_dev_attr(attr)->index;
300 long val;
301
302 int ret = kstrtol(buf, 10, &val);
303 if (ret)
304 return ret;
305 val = clamp_val(val / 1000, -128, 127);
306
307 mutex_lock(&data->update_lock);
308 data->temp[ix] = val;
309 if (i2c_smbus_write_byte_data(client, temp_reg[ix], data->temp[ix])) {
310 dev_err(&client->dev, "Register write error, aborting.\n");
311 count = -EIO;
312 }
313 mutex_unlock(&data->update_lock);
314 return count;
315}
316
317static ssize_t get_temp_alarm(
318 struct device *dev,
319 struct device_attribute *devattr,
320 char *buf)
321{
322 struct amc6821_data *data = amc6821_update_device(dev);
323 int ix = to_sensor_dev_attr(devattr)->index;
324 u8 flag;
325
326 switch (ix) {
327 case IDX_TEMP1_MIN:
328 flag = data->stat1 & AMC6821_STAT1_LTL;
329 break;
330 case IDX_TEMP1_MAX:
331 flag = data->stat1 & AMC6821_STAT1_LTH;
332 break;
333 case IDX_TEMP1_CRIT:
334 flag = data->stat2 & AMC6821_STAT2_LTC;
335 break;
336 case IDX_TEMP2_MIN:
337 flag = data->stat1 & AMC6821_STAT1_RTL;
338 break;
339 case IDX_TEMP2_MAX:
340 flag = data->stat1 & AMC6821_STAT1_RTH;
341 break;
342 case IDX_TEMP2_CRIT:
343 flag = data->stat2 & AMC6821_STAT2_RTC;
344 break;
345 default:
346 dev_dbg(dev, "Unknown attr->index (%d).\n", ix);
347 return -EINVAL;
348 }
349 if (flag)
350 return sprintf(buf, "1");
351 else
352 return sprintf(buf, "0");
353}
354
355static ssize_t get_temp2_fault(
356 struct device *dev,
357 struct device_attribute *devattr,
358 char *buf)
359{
360 struct amc6821_data *data = amc6821_update_device(dev);
361 if (data->stat1 & AMC6821_STAT1_RTF)
362 return sprintf(buf, "1");
363 else
364 return sprintf(buf, "0");
365}
366
367static ssize_t get_pwm1(
368 struct device *dev,
369 struct device_attribute *devattr,
370 char *buf)
371{
372 struct amc6821_data *data = amc6821_update_device(dev);
373 return sprintf(buf, "%d\n", data->pwm1);
374}
375
376static ssize_t set_pwm1(
377 struct device *dev,
378 struct device_attribute *devattr,
379 const char *buf,
380 size_t count)
381{
382 struct amc6821_data *data = dev_get_drvdata(dev);
383 struct i2c_client *client = data->client;
384 long val;
385 int ret = kstrtol(buf, 10, &val);
386 if (ret)
387 return ret;
388
389 mutex_lock(&data->update_lock);
390 data->pwm1 = clamp_val(val , 0, 255);
391 i2c_smbus_write_byte_data(client, AMC6821_REG_DCY, data->pwm1);
392 mutex_unlock(&data->update_lock);
393 return count;
394}
395
396static ssize_t get_pwm1_enable(
397 struct device *dev,
398 struct device_attribute *devattr,
399 char *buf)
400{
401 struct amc6821_data *data = amc6821_update_device(dev);
402 return sprintf(buf, "%d\n", data->pwm1_enable);
403}
404
405static ssize_t set_pwm1_enable(
406 struct device *dev,
407 struct device_attribute *attr,
408 const char *buf,
409 size_t count)
410{
411 struct amc6821_data *data = dev_get_drvdata(dev);
412 struct i2c_client *client = data->client;
413 long val;
414 int config = kstrtol(buf, 10, &val);
415 if (config)
416 return config;
417
418 mutex_lock(&data->update_lock);
419 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1);
420 if (config < 0) {
421 dev_err(&client->dev,
422 "Error reading configuration register, aborting.\n");
423 count = config;
424 goto unlock;
425 }
426
427 switch (val) {
428 case 1:
429 config &= ~AMC6821_CONF1_FDRC0;
430 config &= ~AMC6821_CONF1_FDRC1;
431 break;
432 case 2:
433 config &= ~AMC6821_CONF1_FDRC0;
434 config |= AMC6821_CONF1_FDRC1;
435 break;
436 case 3:
437 config |= AMC6821_CONF1_FDRC0;
438 config |= AMC6821_CONF1_FDRC1;
439 break;
440 default:
441 count = -EINVAL;
442 goto unlock;
443 }
444 if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF1, config)) {
445 dev_err(&client->dev,
446 "Configuration register write error, aborting.\n");
447 count = -EIO;
448 }
449unlock:
450 mutex_unlock(&data->update_lock);
451 return count;
452}
453
454static ssize_t get_pwm1_auto_channels_temp(
455 struct device *dev,
456 struct device_attribute *devattr,
457 char *buf)
458{
459 struct amc6821_data *data = amc6821_update_device(dev);
460 return sprintf(buf, "%d\n", data->pwm1_auto_channels_temp);
461}
462
463static ssize_t get_temp_auto_point_temp(
464 struct device *dev,
465 struct device_attribute *devattr,
466 char *buf)
467{
468 int ix = to_sensor_dev_attr_2(devattr)->index;
469 int nr = to_sensor_dev_attr_2(devattr)->nr;
470 struct amc6821_data *data = amc6821_update_device(dev);
471 switch (nr) {
472 case 1:
473 return sprintf(buf, "%d\n",
474 data->temp1_auto_point_temp[ix] * 1000);
475 case 2:
476 return sprintf(buf, "%d\n",
477 data->temp2_auto_point_temp[ix] * 1000);
478 default:
479 dev_dbg(dev, "Unknown attr->nr (%d).\n", nr);
480 return -EINVAL;
481 }
482}
483
484static ssize_t get_pwm1_auto_point_pwm(
485 struct device *dev,
486 struct device_attribute *devattr,
487 char *buf)
488{
489 int ix = to_sensor_dev_attr(devattr)->index;
490 struct amc6821_data *data = amc6821_update_device(dev);
491 return sprintf(buf, "%d\n", data->pwm1_auto_point_pwm[ix]);
492}
493
494static inline ssize_t set_slope_register(struct i2c_client *client,
495 u8 reg,
496 u8 dpwm,
497 u8 *ptemp)
498{
499 int dt;
500 u8 tmp;
501
502 dt = ptemp[2]-ptemp[1];
503 for (tmp = 4; tmp > 0; tmp--) {
504 if (dt * (0x20 >> tmp) >= dpwm)
505 break;
506 }
507 tmp |= (ptemp[1] & 0x7C) << 1;
508 if (i2c_smbus_write_byte_data(client,
509 reg, tmp)) {
510 dev_err(&client->dev, "Register write error, aborting.\n");
511 return -EIO;
512 }
513 return 0;
514}
515
516static ssize_t set_temp_auto_point_temp(
517 struct device *dev,
518 struct device_attribute *attr,
519 const char *buf,
520 size_t count)
521{
522 struct amc6821_data *data = amc6821_update_device(dev);
523 struct i2c_client *client = data->client;
524 int ix = to_sensor_dev_attr_2(attr)->index;
525 int nr = to_sensor_dev_attr_2(attr)->nr;
526 u8 *ptemp;
527 u8 reg;
528 int dpwm;
529 long val;
530 int ret = kstrtol(buf, 10, &val);
531 if (ret)
532 return ret;
533
534 switch (nr) {
535 case 1:
536 ptemp = data->temp1_auto_point_temp;
537 reg = AMC6821_REG_LTEMP_FAN_CTRL;
538 break;
539 case 2:
540 ptemp = data->temp2_auto_point_temp;
541 reg = AMC6821_REG_RTEMP_FAN_CTRL;
542 break;
543 default:
544 dev_dbg(dev, "Unknown attr->nr (%d).\n", nr);
545 return -EINVAL;
546 }
547
548 mutex_lock(&data->update_lock);
549 data->valid = 0;
550
551 switch (ix) {
552 case 0:
553 ptemp[0] = clamp_val(val / 1000, 0,
554 data->temp1_auto_point_temp[1]);
555 ptemp[0] = clamp_val(ptemp[0], 0,
556 data->temp2_auto_point_temp[1]);
557 ptemp[0] = clamp_val(ptemp[0], 0, 63);
558 if (i2c_smbus_write_byte_data(
559 client,
560 AMC6821_REG_PSV_TEMP,
561 ptemp[0])) {
562 dev_err(&client->dev,
563 "Register write error, aborting.\n");
564 count = -EIO;
565 }
566 goto EXIT;
567 case 1:
568 ptemp[1] = clamp_val(val / 1000, (ptemp[0] & 0x7C) + 4, 124);
569 ptemp[1] &= 0x7C;
570 ptemp[2] = clamp_val(ptemp[2], ptemp[1] + 1, 255);
571 break;
572 case 2:
573 ptemp[2] = clamp_val(val / 1000, ptemp[1]+1, 255);
574 break;
575 default:
576 dev_dbg(dev, "Unknown attr->index (%d).\n", ix);
577 count = -EINVAL;
578 goto EXIT;
579 }
580 dpwm = data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1];
581 if (set_slope_register(client, reg, dpwm, ptemp))
582 count = -EIO;
583
584EXIT:
585 mutex_unlock(&data->update_lock);
586 return count;
587}
588
589static ssize_t set_pwm1_auto_point_pwm(
590 struct device *dev,
591 struct device_attribute *attr,
592 const char *buf,
593 size_t count)
594{
595 struct amc6821_data *data = dev_get_drvdata(dev);
596 struct i2c_client *client = data->client;
597 int dpwm;
598 long val;
599 int ret = kstrtol(buf, 10, &val);
600 if (ret)
601 return ret;
602
603 mutex_lock(&data->update_lock);
604 data->pwm1_auto_point_pwm[1] = clamp_val(val, 0, 254);
605 if (i2c_smbus_write_byte_data(client, AMC6821_REG_DCY_LOW_TEMP,
606 data->pwm1_auto_point_pwm[1])) {
607 dev_err(&client->dev, "Register write error, aborting.\n");
608 count = -EIO;
609 goto EXIT;
610 }
611 dpwm = data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1];
612 if (set_slope_register(client, AMC6821_REG_LTEMP_FAN_CTRL, dpwm,
613 data->temp1_auto_point_temp)) {
614 count = -EIO;
615 goto EXIT;
616 }
617 if (set_slope_register(client, AMC6821_REG_RTEMP_FAN_CTRL, dpwm,
618 data->temp2_auto_point_temp)) {
619 count = -EIO;
620 goto EXIT;
621 }
622
623EXIT:
624 data->valid = 0;
625 mutex_unlock(&data->update_lock);
626 return count;
627}
628
629static ssize_t get_fan(
630 struct device *dev,
631 struct device_attribute *devattr,
632 char *buf)
633{
634 struct amc6821_data *data = amc6821_update_device(dev);
635 int ix = to_sensor_dev_attr(devattr)->index;
636 if (0 == data->fan[ix])
637 return sprintf(buf, "0");
638 return sprintf(buf, "%d\n", (int)(6000000 / data->fan[ix]));
639}
640
641static ssize_t get_fan1_fault(
642 struct device *dev,
643 struct device_attribute *devattr,
644 char *buf)
645{
646 struct amc6821_data *data = amc6821_update_device(dev);
647 if (data->stat1 & AMC6821_STAT1_FANS)
648 return sprintf(buf, "1");
649 else
650 return sprintf(buf, "0");
651}
652
653static ssize_t set_fan(
654 struct device *dev,
655 struct device_attribute *attr,
656 const char *buf, size_t count)
657{
658 struct amc6821_data *data = dev_get_drvdata(dev);
659 struct i2c_client *client = data->client;
660 long val;
661 int ix = to_sensor_dev_attr(attr)->index;
662 int ret = kstrtol(buf, 10, &val);
663 if (ret)
664 return ret;
665 val = 1 > val ? 0xFFFF : 6000000/val;
666
667 mutex_lock(&data->update_lock);
668 data->fan[ix] = (u16) clamp_val(val, 1, 0xFFFF);
669 if (i2c_smbus_write_byte_data(client, fan_reg_low[ix],
670 data->fan[ix] & 0xFF)) {
671 dev_err(&client->dev, "Register write error, aborting.\n");
672 count = -EIO;
673 goto EXIT;
674 }
675 if (i2c_smbus_write_byte_data(client,
676 fan_reg_hi[ix], data->fan[ix] >> 8)) {
677 dev_err(&client->dev, "Register write error, aborting.\n");
678 count = -EIO;
679 }
680EXIT:
681 mutex_unlock(&data->update_lock);
682 return count;
683}
684
685static ssize_t get_fan1_div(
686 struct device *dev,
687 struct device_attribute *devattr,
688 char *buf)
689{
690 struct amc6821_data *data = amc6821_update_device(dev);
691 return sprintf(buf, "%d\n", data->fan1_div);
692}
693
694static ssize_t set_fan1_div(
695 struct device *dev,
696 struct device_attribute *attr,
697 const char *buf, size_t count)
698{
699 struct amc6821_data *data = dev_get_drvdata(dev);
700 struct i2c_client *client = data->client;
701 long val;
702 int config = kstrtol(buf, 10, &val);
703 if (config)
704 return config;
705
706 mutex_lock(&data->update_lock);
707 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4);
708 if (config < 0) {
709 dev_err(&client->dev,
710 "Error reading configuration register, aborting.\n");
711 count = config;
712 goto EXIT;
713 }
714 switch (val) {
715 case 2:
716 config &= ~AMC6821_CONF4_PSPR;
717 data->fan1_div = 2;
718 break;
719 case 4:
720 config |= AMC6821_CONF4_PSPR;
721 data->fan1_div = 4;
722 break;
723 default:
724 count = -EINVAL;
725 goto EXIT;
726 }
727 if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF4, config)) {
728 dev_err(&client->dev,
729 "Configuration register write error, aborting.\n");
730 count = -EIO;
731 }
732EXIT:
733 mutex_unlock(&data->update_lock);
734 return count;
735}
736
737static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
738 get_temp, NULL, IDX_TEMP1_INPUT);
739static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO | S_IWUSR, get_temp,
740 set_temp, IDX_TEMP1_MIN);
741static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, get_temp,
742 set_temp, IDX_TEMP1_MAX);
743static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO | S_IWUSR, get_temp,
744 set_temp, IDX_TEMP1_CRIT);
745static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO,
746 get_temp_alarm, NULL, IDX_TEMP1_MIN);
747static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO,
748 get_temp_alarm, NULL, IDX_TEMP1_MAX);
749static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO,
750 get_temp_alarm, NULL, IDX_TEMP1_CRIT);
751static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
752 get_temp, NULL, IDX_TEMP2_INPUT);
753static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO | S_IWUSR, get_temp,
754 set_temp, IDX_TEMP2_MIN);
755static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR, get_temp,
756 set_temp, IDX_TEMP2_MAX);
757static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO | S_IWUSR, get_temp,
758 set_temp, IDX_TEMP2_CRIT);
759static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO,
760 get_temp2_fault, NULL, 0);
761static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO,
762 get_temp_alarm, NULL, IDX_TEMP2_MIN);
763static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO,
764 get_temp_alarm, NULL, IDX_TEMP2_MAX);
765static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO,
766 get_temp_alarm, NULL, IDX_TEMP2_CRIT);
767static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan, NULL, IDX_FAN1_INPUT);
768static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
769 get_fan, set_fan, IDX_FAN1_MIN);
770static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO | S_IWUSR,
771 get_fan, set_fan, IDX_FAN1_MAX);
772static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, get_fan1_fault, NULL, 0);
773static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
774 get_fan1_div, set_fan1_div, 0);
775
776static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, get_pwm1, set_pwm1, 0);
777static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
778 get_pwm1_enable, set_pwm1_enable, 0);
779static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IRUGO,
780 get_pwm1_auto_point_pwm, NULL, 0);
781static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
782 get_pwm1_auto_point_pwm, set_pwm1_auto_point_pwm, 1);
783static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IRUGO,
784 get_pwm1_auto_point_pwm, NULL, 2);
785static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IRUGO,
786 get_pwm1_auto_channels_temp, NULL, 0);
787static SENSOR_DEVICE_ATTR_2(temp1_auto_point1_temp, S_IRUGO,
788 get_temp_auto_point_temp, NULL, 1, 0);
789static SENSOR_DEVICE_ATTR_2(temp1_auto_point2_temp, S_IWUSR | S_IRUGO,
790 get_temp_auto_point_temp, set_temp_auto_point_temp, 1, 1);
791static SENSOR_DEVICE_ATTR_2(temp1_auto_point3_temp, S_IWUSR | S_IRUGO,
792 get_temp_auto_point_temp, set_temp_auto_point_temp, 1, 2);
793
794static SENSOR_DEVICE_ATTR_2(temp2_auto_point1_temp, S_IWUSR | S_IRUGO,
795 get_temp_auto_point_temp, set_temp_auto_point_temp, 2, 0);
796static SENSOR_DEVICE_ATTR_2(temp2_auto_point2_temp, S_IWUSR | S_IRUGO,
797 get_temp_auto_point_temp, set_temp_auto_point_temp, 2, 1);
798static SENSOR_DEVICE_ATTR_2(temp2_auto_point3_temp, S_IWUSR | S_IRUGO,
799 get_temp_auto_point_temp, set_temp_auto_point_temp, 2, 2);
800
801static struct attribute *amc6821_attrs[] = {
802 &sensor_dev_attr_temp1_input.dev_attr.attr,
803 &sensor_dev_attr_temp1_min.dev_attr.attr,
804 &sensor_dev_attr_temp1_max.dev_attr.attr,
805 &sensor_dev_attr_temp1_crit.dev_attr.attr,
806 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
807 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
808 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
809 &sensor_dev_attr_temp2_input.dev_attr.attr,
810 &sensor_dev_attr_temp2_min.dev_attr.attr,
811 &sensor_dev_attr_temp2_max.dev_attr.attr,
812 &sensor_dev_attr_temp2_crit.dev_attr.attr,
813 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
814 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
815 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
816 &sensor_dev_attr_temp2_fault.dev_attr.attr,
817 &sensor_dev_attr_fan1_input.dev_attr.attr,
818 &sensor_dev_attr_fan1_min.dev_attr.attr,
819 &sensor_dev_attr_fan1_max.dev_attr.attr,
820 &sensor_dev_attr_fan1_fault.dev_attr.attr,
821 &sensor_dev_attr_fan1_div.dev_attr.attr,
822 &sensor_dev_attr_pwm1.dev_attr.attr,
823 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
824 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
825 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
826 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
827 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
828 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
829 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
830 &sensor_dev_attr_temp1_auto_point3_temp.dev_attr.attr,
831 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
832 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
833 &sensor_dev_attr_temp2_auto_point3_temp.dev_attr.attr,
834 NULL
835};
836
837ATTRIBUTE_GROUPS(amc6821);
838
839
840static int amc6821_detect(
841 struct i2c_client *client,
842 struct i2c_board_info *info)
843{
844 struct i2c_adapter *adapter = client->adapter;
845 int address = client->addr;
846 int dev_id, comp_id;
847
848 dev_dbg(&adapter->dev, "amc6821_detect called.\n");
849
850 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
851 dev_dbg(&adapter->dev,
852 "amc6821: I2C bus doesn't support byte mode, "
853 "skipping.\n");
854 return -ENODEV;
855 }
856
857 dev_id = i2c_smbus_read_byte_data(client, AMC6821_REG_DEV_ID);
858 comp_id = i2c_smbus_read_byte_data(client, AMC6821_REG_COMP_ID);
859 if (dev_id != 0x21 || comp_id != 0x49) {
860 dev_dbg(&adapter->dev,
861 "amc6821: detection failed at 0x%02x.\n",
862 address);
863 return -ENODEV;
864 }
865
866
867
868
869
870 dev_id = i2c_smbus_read_byte_data(client, 0x80 | AMC6821_REG_DEV_ID);
871 comp_id = i2c_smbus_read_byte_data(client, 0x80 | AMC6821_REG_COMP_ID);
872 if (dev_id != 0x21 || comp_id != 0x49) {
873 dev_dbg(&adapter->dev,
874 "amc6821: detection failed at 0x%02x.\n",
875 address);
876 return -ENODEV;
877 }
878
879 dev_info(&adapter->dev, "amc6821: chip found at 0x%02x.\n", address);
880 strlcpy(info->type, "amc6821", I2C_NAME_SIZE);
881
882 return 0;
883}
884
885static int amc6821_init_client(struct i2c_client *client)
886{
887 int config;
888 int err = -EIO;
889
890 if (init) {
891 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4);
892
893 if (config < 0) {
894 dev_err(&client->dev,
895 "Error reading configuration register, aborting.\n");
896 return err;
897 }
898
899 config |= AMC6821_CONF4_MODE;
900
901 if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF4,
902 config)) {
903 dev_err(&client->dev,
904 "Configuration register write error, aborting.\n");
905 return err;
906 }
907
908 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF3);
909
910 if (config < 0) {
911 dev_err(&client->dev,
912 "Error reading configuration register, aborting.\n");
913 return err;
914 }
915
916 dev_info(&client->dev, "Revision %d\n", config & 0x0f);
917
918 config &= ~AMC6821_CONF3_THERM_FAN_EN;
919
920 if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF3,
921 config)) {
922 dev_err(&client->dev,
923 "Configuration register write error, aborting.\n");
924 return err;
925 }
926
927 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF2);
928
929 if (config < 0) {
930 dev_err(&client->dev,
931 "Error reading configuration register, aborting.\n");
932 return err;
933 }
934
935 config &= ~AMC6821_CONF2_RTFIE;
936 config &= ~AMC6821_CONF2_LTOIE;
937 config &= ~AMC6821_CONF2_RTOIE;
938 if (i2c_smbus_write_byte_data(client,
939 AMC6821_REG_CONF2, config)) {
940 dev_err(&client->dev,
941 "Configuration register write error, aborting.\n");
942 return err;
943 }
944
945 config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1);
946
947 if (config < 0) {
948 dev_err(&client->dev,
949 "Error reading configuration register, aborting.\n");
950 return err;
951 }
952
953 config &= ~AMC6821_CONF1_THERMOVIE;
954 config &= ~AMC6821_CONF1_FANIE;
955 config |= AMC6821_CONF1_START;
956 if (pwminv)
957 config |= AMC6821_CONF1_PWMINV;
958 else
959 config &= ~AMC6821_CONF1_PWMINV;
960
961 if (i2c_smbus_write_byte_data(
962 client, AMC6821_REG_CONF1, config)) {
963 dev_err(&client->dev,
964 "Configuration register write error, aborting.\n");
965 return err;
966 }
967 }
968 return 0;
969}
970
971static int amc6821_probe(struct i2c_client *client,
972 const struct i2c_device_id *id)
973{
974 struct device *dev = &client->dev;
975 struct amc6821_data *data;
976 struct device *hwmon_dev;
977 int err;
978
979 data = devm_kzalloc(dev, sizeof(struct amc6821_data), GFP_KERNEL);
980 if (!data)
981 return -ENOMEM;
982
983 data->client = client;
984 mutex_init(&data->update_lock);
985
986
987
988
989 err = amc6821_init_client(client);
990 if (err)
991 return err;
992
993 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
994 data,
995 amc6821_groups);
996 return PTR_ERR_OR_ZERO(hwmon_dev);
997}
998
999static const struct i2c_device_id amc6821_id[] = {
1000 { "amc6821", amc6821 },
1001 { }
1002};
1003
1004MODULE_DEVICE_TABLE(i2c, amc6821_id);
1005
1006static struct i2c_driver amc6821_driver = {
1007 .class = I2C_CLASS_HWMON,
1008 .driver = {
1009 .name = "amc6821",
1010 },
1011 .probe = amc6821_probe,
1012 .id_table = amc6821_id,
1013 .detect = amc6821_detect,
1014 .address_list = normal_i2c,
1015};
1016
1017module_i2c_driver(amc6821_driver);
1018
1019MODULE_LICENSE("GPL");
1020MODULE_AUTHOR("T. Mertelj <tomaz.mertelj@guest.arnes.si>");
1021MODULE_DESCRIPTION("Texas Instruments amc6821 hwmon driver");
1022
