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1/*
2 * lm63.c - driver for the National Semiconductor LM63 temperature sensor
3 * with integrated fan control
4 * Copyright (C) 2004-2008 Jean Delvare <jdelvare@suse.de>
5 * Based on the lm90 driver.
6 *
7 * The LM63 is a sensor chip made by National Semiconductor. It measures
8 * two temperatures (its own and one external one) and the speed of one
9 * fan, those speed it can additionally control. Complete datasheet can be
10 * obtained from National's website at:
11 * http://www.national.com/pf/LM/LM63.html
12 *
13 * The LM63 is basically an LM86 with fan speed monitoring and control
14 * capabilities added. It misses some of the LM86 features though:
15 * - No low limit for local temperature.
16 * - No critical limit for local temperature.
17 * - Critical limit for remote temperature can be changed only once. We
18 * will consider that the critical limit is read-only.
19 *
20 * The datasheet isn't very clear about what the tachometer reading is.
21 * I had a explanation from National Semiconductor though. The two lower
22 * bits of the read value have to be masked out. The value is still 16 bit
23 * in width.
24 *
25 * This program is free software; you can redistribute it and/or modify
26 * it under the terms of the GNU General Public License as published by
27 * the Free Software Foundation; either version 2 of the License, or
28 * (at your option) any later version.
29 *
30 * This program is distributed in the hope that it will be useful,
31 * but WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
33 * GNU General Public License for more details.
34 *
35 * You should have received a copy of the GNU General Public License
36 * along with this program; if not, write to the Free Software
37 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
38 */
39
40#include <linux/module.h>
41#include <linux/init.h>
42#include <linux/slab.h>
43#include <linux/jiffies.h>
44#include <linux/i2c.h>
45#include <linux/hwmon-sysfs.h>
46#include <linux/hwmon.h>
47#include <linux/err.h>
48#include <linux/mutex.h>
49#include <linux/sysfs.h>
50#include <linux/types.h>
51
52/*
53 * Addresses to scan
54 * Address is fully defined internally and cannot be changed except for
55 * LM64 which has one pin dedicated to address selection.
56 * LM63 and LM96163 have address 0x4c.
57 * LM64 can have address 0x18 or 0x4e.
58 */
59
60static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END };
61
62/*
63 * The LM63 registers
64 */
65
66#define LM63_REG_CONFIG1 0x03
67#define LM63_REG_CONVRATE 0x04
68#define LM63_REG_CONFIG2 0xBF
69#define LM63_REG_CONFIG_FAN 0x4A
70
71#define LM63_REG_TACH_COUNT_MSB 0x47
72#define LM63_REG_TACH_COUNT_LSB 0x46
73#define LM63_REG_TACH_LIMIT_MSB 0x49
74#define LM63_REG_TACH_LIMIT_LSB 0x48
75
76#define LM63_REG_PWM_VALUE 0x4C
77#define LM63_REG_PWM_FREQ 0x4D
78#define LM63_REG_LUT_TEMP_HYST 0x4F
79#define LM63_REG_LUT_TEMP(nr) (0x50 + 2 * (nr))
80#define LM63_REG_LUT_PWM(nr) (0x51 + 2 * (nr))
81
82#define LM63_REG_LOCAL_TEMP 0x00
83#define LM63_REG_LOCAL_HIGH 0x05
84
85#define LM63_REG_REMOTE_TEMP_MSB 0x01
86#define LM63_REG_REMOTE_TEMP_LSB 0x10
87#define LM63_REG_REMOTE_OFFSET_MSB 0x11
88#define LM63_REG_REMOTE_OFFSET_LSB 0x12
89#define LM63_REG_REMOTE_HIGH_MSB 0x07
90#define LM63_REG_REMOTE_HIGH_LSB 0x13
91#define LM63_REG_REMOTE_LOW_MSB 0x08
92#define LM63_REG_REMOTE_LOW_LSB 0x14
93#define LM63_REG_REMOTE_TCRIT 0x19
94#define LM63_REG_REMOTE_TCRIT_HYST 0x21
95
96#define LM63_REG_ALERT_STATUS 0x02
97#define LM63_REG_ALERT_MASK 0x16
98
99#define LM63_REG_MAN_ID 0xFE
100#define LM63_REG_CHIP_ID 0xFF
101
102#define LM96163_REG_TRUTHERM 0x30
103#define LM96163_REG_REMOTE_TEMP_U_MSB 0x31
104#define LM96163_REG_REMOTE_TEMP_U_LSB 0x32
105#define LM96163_REG_CONFIG_ENHANCED 0x45
106
107#define LM63_MAX_CONVRATE 9
108
109#define LM63_MAX_CONVRATE_HZ 32
110#define LM96163_MAX_CONVRATE_HZ 26
111
112/*
113 * Conversions and various macros
114 * For tachometer counts, the LM63 uses 16-bit values.
115 * For local temperature and high limit, remote critical limit and hysteresis
116 * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
117 * For remote temperature, low and high limits, it uses signed 11-bit values
118 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
119 * For LM64 the actual remote diode temperature is 16 degree Celsius higher
120 * than the register reading. Remote temperature setpoints have to be
121 * adapted accordingly.
122 */
123
124#define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
125 5400000 / (reg))
126#define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \
127 (5400000 / (val)) & 0xFFFC)
128#define TEMP8_FROM_REG(reg) ((reg) * 1000)
129#define TEMP8_TO_REG(val) ((val) <= -128000 ? -128 : \
130 (val) >= 127000 ? 127 : \
131 (val) < 0 ? ((val) - 500) / 1000 : \
132 ((val) + 500) / 1000)
133#define TEMP8U_TO_REG(val) ((val) <= 0 ? 0 : \
134 (val) >= 255000 ? 255 : \
135 ((val) + 500) / 1000)
136#define TEMP11_FROM_REG(reg) ((reg) / 32 * 125)
137#define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \
138 (val) >= 127875 ? 0x7FE0 : \
139 (val) < 0 ? ((val) - 62) / 125 * 32 : \
140 ((val) + 62) / 125 * 32)
141#define TEMP11U_TO_REG(val) ((val) <= 0 ? 0 : \
142 (val) >= 255875 ? 0xFFE0 : \
143 ((val) + 62) / 125 * 32)
144#define HYST_TO_REG(val) ((val) <= 0 ? 0 : \
145 (val) >= 127000 ? 127 : \
146 ((val) + 500) / 1000)
147
148#define UPDATE_INTERVAL(max, rate) \
149 ((1000 << (LM63_MAX_CONVRATE - (rate))) / (max))
150
151enum chips { lm63, lm64, lm96163 };
152
153/*
154 * Client data (each client gets its own)
155 */
156
157struct lm63_data {
158 struct i2c_client *client;
159 struct mutex update_lock;
160 const struct attribute_group *groups[5];
161 char valid; /* zero until following fields are valid */
162 char lut_valid; /* zero until lut fields are valid */
163 unsigned long last_updated; /* in jiffies */
164 unsigned long lut_last_updated; /* in jiffies */
165 enum chips kind;
166 int temp2_offset;
167
168 int update_interval; /* in milliseconds */
169 int max_convrate_hz;
170 int lut_size; /* 8 or 12 */
171
172 /* registers values */
173 u8 config, config_fan;
174 u16 fan[2]; /* 0: input
175 1: low limit */
176 u8 pwm1_freq;
177 u8 pwm1[13]; /* 0: current output
178 1-12: lookup table */
179 s8 temp8[15]; /* 0: local input
180 1: local high limit
181 2: remote critical limit
182 3-14: lookup table */
183 s16 temp11[4]; /* 0: remote input
184 1: remote low limit
185 2: remote high limit
186 3: remote offset */
187 u16 temp11u; /* remote input (unsigned) */
188 u8 temp2_crit_hyst;
189 u8 lut_temp_hyst;
190 u8 alarms;
191 bool pwm_highres;
192 bool lut_temp_highres;
193 bool remote_unsigned; /* true if unsigned remote upper limits */
194 bool trutherm;
195};
196
197static inline int temp8_from_reg(struct lm63_data *data, int nr)
198{
199 if (data->remote_unsigned)
200 return TEMP8_FROM_REG((u8)data->temp8[nr]);
201 return TEMP8_FROM_REG(data->temp8[nr]);
202}
203
204static inline int lut_temp_from_reg(struct lm63_data *data, int nr)
205{
206 return data->temp8[nr] * (data->lut_temp_highres ? 500 : 1000);
207}
208
209static inline int lut_temp_to_reg(struct lm63_data *data, long val)
210{
211 val -= data->temp2_offset;
212 if (data->lut_temp_highres)
213 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127500), 500);
214 else
215 return DIV_ROUND_CLOSEST(clamp_val(val, 0, 127000), 1000);
216}
217
218/*
219 * Update the lookup table register cache.
220 * client->update_lock must be held when calling this function.
221 */
222static void lm63_update_lut(struct lm63_data *data)
223{
224 struct i2c_client *client = data->client;
225 int i;
226
227 if (time_after(jiffies, data->lut_last_updated + 5 * HZ) ||
228 !data->lut_valid) {
229 for (i = 0; i < data->lut_size; i++) {
230 data->pwm1[1 + i] = i2c_smbus_read_byte_data(client,
231 LM63_REG_LUT_PWM(i));
232 data->temp8[3 + i] = i2c_smbus_read_byte_data(client,
233 LM63_REG_LUT_TEMP(i));
234 }
235 data->lut_temp_hyst = i2c_smbus_read_byte_data(client,
236 LM63_REG_LUT_TEMP_HYST);
237
238 data->lut_last_updated = jiffies;
239 data->lut_valid = 1;
240 }
241}
242
243static struct lm63_data *lm63_update_device(struct device *dev)
244{
245 struct lm63_data *data = dev_get_drvdata(dev);
246 struct i2c_client *client = data->client;
247 unsigned long next_update;
248
249 mutex_lock(&data->update_lock);
250
251 next_update = data->last_updated +
252 msecs_to_jiffies(data->update_interval);
253 if (time_after(jiffies, next_update) || !data->valid) {
254 if (data->config & 0x04) { /* tachometer enabled */
255 /* order matters for fan1_input */
256 data->fan[0] = i2c_smbus_read_byte_data(client,
257 LM63_REG_TACH_COUNT_LSB) & 0xFC;
258 data->fan[0] |= i2c_smbus_read_byte_data(client,
259 LM63_REG_TACH_COUNT_MSB) << 8;
260 data->fan[1] = (i2c_smbus_read_byte_data(client,
261 LM63_REG_TACH_LIMIT_LSB) & 0xFC)
262 | (i2c_smbus_read_byte_data(client,
263 LM63_REG_TACH_LIMIT_MSB) << 8);
264 }
265
266 data->pwm1_freq = i2c_smbus_read_byte_data(client,
267 LM63_REG_PWM_FREQ);
268 if (data->pwm1_freq == 0)
269 data->pwm1_freq = 1;
270 data->pwm1[0] = i2c_smbus_read_byte_data(client,
271 LM63_REG_PWM_VALUE);
272
273 data->temp8[0] = i2c_smbus_read_byte_data(client,
274 LM63_REG_LOCAL_TEMP);
275 data->temp8[1] = i2c_smbus_read_byte_data(client,
276 LM63_REG_LOCAL_HIGH);
277
278 /* order matters for temp2_input */
279 data->temp11[0] = i2c_smbus_read_byte_data(client,
280 LM63_REG_REMOTE_TEMP_MSB) << 8;
281 data->temp11[0] |= i2c_smbus_read_byte_data(client,
282 LM63_REG_REMOTE_TEMP_LSB);
283 data->temp11[1] = (i2c_smbus_read_byte_data(client,
284 LM63_REG_REMOTE_LOW_MSB) << 8)
285 | i2c_smbus_read_byte_data(client,
286 LM63_REG_REMOTE_LOW_LSB);
287 data->temp11[2] = (i2c_smbus_read_byte_data(client,
288 LM63_REG_REMOTE_HIGH_MSB) << 8)
289 | i2c_smbus_read_byte_data(client,
290 LM63_REG_REMOTE_HIGH_LSB);
291 data->temp11[3] = (i2c_smbus_read_byte_data(client,
292 LM63_REG_REMOTE_OFFSET_MSB) << 8)
293 | i2c_smbus_read_byte_data(client,
294 LM63_REG_REMOTE_OFFSET_LSB);
295
296 if (data->kind == lm96163)
297 data->temp11u = (i2c_smbus_read_byte_data(client,
298 LM96163_REG_REMOTE_TEMP_U_MSB) << 8)
299 | i2c_smbus_read_byte_data(client,
300 LM96163_REG_REMOTE_TEMP_U_LSB);
301
302 data->temp8[2] = i2c_smbus_read_byte_data(client,
303 LM63_REG_REMOTE_TCRIT);
304 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
305 LM63_REG_REMOTE_TCRIT_HYST);
306
307 data->alarms = i2c_smbus_read_byte_data(client,
308 LM63_REG_ALERT_STATUS) & 0x7F;
309
310 data->last_updated = jiffies;
311 data->valid = 1;
312 }
313
314 lm63_update_lut(data);
315
316 mutex_unlock(&data->update_lock);
317
318 return data;
319}
320
321/*
322 * Trip points in the lookup table should be in ascending order for both
323 * temperatures and PWM output values.
324 */
325static int lm63_lut_looks_bad(struct device *dev, struct lm63_data *data)
326{
327 int i;
328
329 mutex_lock(&data->update_lock);
330 lm63_update_lut(data);
331
332 for (i = 1; i < data->lut_size; i++) {
333 if (data->pwm1[1 + i - 1] > data->pwm1[1 + i]
334 || data->temp8[3 + i - 1] > data->temp8[3 + i]) {
335 dev_warn(dev,
336 "Lookup table doesn't look sane (check entries %d and %d)\n",
337 i, i + 1);
338 break;
339 }
340 }
341 mutex_unlock(&data->update_lock);
342
343 return i == data->lut_size ? 0 : 1;
344}
345
346/*
347 * Sysfs callback functions and files
348 */
349
350static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
351 char *buf)
352{
353 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
354 struct lm63_data *data = lm63_update_device(dev);
355 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
356}
357
358static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
359 const char *buf, size_t count)
360{
361 struct lm63_data *data = dev_get_drvdata(dev);
362 struct i2c_client *client = data->client;
363 unsigned long val;
364 int err;
365
366 err = kstrtoul(buf, 10, &val);
367 if (err)
368 return err;
369
370 mutex_lock(&data->update_lock);
371 data->fan[1] = FAN_TO_REG(val);
372 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
373 data->fan[1] & 0xFF);
374 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
375 data->fan[1] >> 8);
376 mutex_unlock(&data->update_lock);
377 return count;
378}
379
380static ssize_t show_pwm1(struct device *dev, struct device_attribute *devattr,
381 char *buf)
382{
383 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
384 struct lm63_data *data = lm63_update_device(dev);
385 int nr = attr->index;
386 int pwm;
387
388 if (data->pwm_highres)
389 pwm = data->pwm1[nr];
390 else
391 pwm = data->pwm1[nr] >= 2 * data->pwm1_freq ?
392 255 : (data->pwm1[nr] * 255 + data->pwm1_freq) /
393 (2 * data->pwm1_freq);
394
395 return sprintf(buf, "%d\n", pwm);
396}
397
398static ssize_t set_pwm1(struct device *dev, struct device_attribute *devattr,
399 const char *buf, size_t count)
400{
401 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
402 struct lm63_data *data = dev_get_drvdata(dev);
403 struct i2c_client *client = data->client;
404 int nr = attr->index;
405 unsigned long val;
406 int err;
407 u8 reg;
408
409 if (!(data->config_fan & 0x20)) /* register is read-only */
410 return -EPERM;
411
412 err = kstrtoul(buf, 10, &val);
413 if (err)
414 return err;
415
416 reg = nr ? LM63_REG_LUT_PWM(nr - 1) : LM63_REG_PWM_VALUE;
417 val = clamp_val(val, 0, 255);
418
419 mutex_lock(&data->update_lock);
420 data->pwm1[nr] = data->pwm_highres ? val :
421 (val * data->pwm1_freq * 2 + 127) / 255;
422 i2c_smbus_write_byte_data(client, reg, data->pwm1[nr]);
423 mutex_unlock(&data->update_lock);
424 return count;
425}
426
427static ssize_t show_pwm1_enable(struct device *dev,
428 struct device_attribute *dummy, char *buf)
429{
430 struct lm63_data *data = lm63_update_device(dev);
431 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
432}
433
434static ssize_t set_pwm1_enable(struct device *dev,
435 struct device_attribute *dummy,
436 const char *buf, size_t count)
437{
438 struct lm63_data *data = dev_get_drvdata(dev);
439 struct i2c_client *client = data->client;
440 unsigned long val;
441 int err;
442
443 err = kstrtoul(buf, 10, &val);
444 if (err)
445 return err;
446 if (val < 1 || val > 2)
447 return -EINVAL;
448
449 /*
450 * Only let the user switch to automatic mode if the lookup table
451 * looks sane.
452 */
453 if (val == 2 && lm63_lut_looks_bad(dev, data))
454 return -EPERM;
455
456 mutex_lock(&data->update_lock);
457 data->config_fan = i2c_smbus_read_byte_data(client,
458 LM63_REG_CONFIG_FAN);
459 if (val == 1)
460 data->config_fan |= 0x20;
461 else
462 data->config_fan &= ~0x20;
463 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG_FAN,
464 data->config_fan);
465 mutex_unlock(&data->update_lock);
466 return count;
467}
468
469/*
470 * There are 8bit registers for both local(temp1) and remote(temp2) sensor.
471 * For remote sensor registers temp2_offset has to be considered,
472 * for local sensor it must not.
473 * So we need separate 8bit accessors for local and remote sensor.
474 */
475static ssize_t show_local_temp8(struct device *dev,
476 struct device_attribute *devattr,
477 char *buf)
478{
479 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
480 struct lm63_data *data = lm63_update_device(dev);
481 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
482}
483
484static ssize_t show_remote_temp8(struct device *dev,
485 struct device_attribute *devattr,
486 char *buf)
487{
488 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
489 struct lm63_data *data = lm63_update_device(dev);
490 return sprintf(buf, "%d\n", temp8_from_reg(data, attr->index)
491 + data->temp2_offset);
492}
493
494static ssize_t show_lut_temp(struct device *dev,
495 struct device_attribute *devattr,
496 char *buf)
497{
498 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
499 struct lm63_data *data = lm63_update_device(dev);
500 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
501 + data->temp2_offset);
502}
503
504static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
505 const char *buf, size_t count)
506{
507 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
508 struct lm63_data *data = dev_get_drvdata(dev);
509 struct i2c_client *client = data->client;
510 int nr = attr->index;
511 long val;
512 int err;
513 int temp;
514 u8 reg;
515
516 err = kstrtol(buf, 10, &val);
517 if (err)
518 return err;
519
520 mutex_lock(&data->update_lock);
521 switch (nr) {
522 case 2:
523 reg = LM63_REG_REMOTE_TCRIT;
524 if (data->remote_unsigned)
525 temp = TEMP8U_TO_REG(val - data->temp2_offset);
526 else
527 temp = TEMP8_TO_REG(val - data->temp2_offset);
528 break;
529 case 1:
530 reg = LM63_REG_LOCAL_HIGH;
531 temp = TEMP8_TO_REG(val);
532 break;
533 default: /* lookup table */
534 reg = LM63_REG_LUT_TEMP(nr - 3);
535 temp = lut_temp_to_reg(data, val);
536 }
537 data->temp8[nr] = temp;
538 i2c_smbus_write_byte_data(client, reg, temp);
539 mutex_unlock(&data->update_lock);
540 return count;
541}
542
543static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
544 char *buf)
545{
546 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
547 struct lm63_data *data = lm63_update_device(dev);
548 int nr = attr->index;
549 int temp;
550
551 if (!nr) {
552 /*
553 * Use unsigned temperature unless its value is zero.
554 * If it is zero, use signed temperature.
555 */
556 if (data->temp11u)
557 temp = TEMP11_FROM_REG(data->temp11u);
558 else
559 temp = TEMP11_FROM_REG(data->temp11[nr]);
560 } else {
561 if (data->remote_unsigned && nr == 2)
562 temp = TEMP11_FROM_REG((u16)data->temp11[nr]);
563 else
564 temp = TEMP11_FROM_REG(data->temp11[nr]);
565 }
566 return sprintf(buf, "%d\n", temp + data->temp2_offset);
567}
568
569static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
570 const char *buf, size_t count)
571{
572 static const u8 reg[6] = {
573 LM63_REG_REMOTE_LOW_MSB,
574 LM63_REG_REMOTE_LOW_LSB,
575 LM63_REG_REMOTE_HIGH_MSB,
576 LM63_REG_REMOTE_HIGH_LSB,
577 LM63_REG_REMOTE_OFFSET_MSB,
578 LM63_REG_REMOTE_OFFSET_LSB,
579 };
580
581 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
582 struct lm63_data *data = dev_get_drvdata(dev);
583 struct i2c_client *client = data->client;
584 long val;
585 int err;
586 int nr = attr->index;
587
588 err = kstrtol(buf, 10, &val);
589 if (err)
590 return err;
591
592 mutex_lock(&data->update_lock);
593 if (data->remote_unsigned && nr == 2)
594 data->temp11[nr] = TEMP11U_TO_REG(val - data->temp2_offset);
595 else
596 data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset);
597
598 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
599 data->temp11[nr] >> 8);
600 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
601 data->temp11[nr] & 0xff);
602 mutex_unlock(&data->update_lock);
603 return count;
604}
605
606/*
607 * Hysteresis register holds a relative value, while we want to present
608 * an absolute to user-space
609 */
610static ssize_t show_temp2_crit_hyst(struct device *dev,
611 struct device_attribute *dummy, char *buf)
612{
613 struct lm63_data *data = lm63_update_device(dev);
614 return sprintf(buf, "%d\n", temp8_from_reg(data, 2)
615 + data->temp2_offset
616 - TEMP8_FROM_REG(data->temp2_crit_hyst));
617}
618
619static ssize_t show_lut_temp_hyst(struct device *dev,
620 struct device_attribute *devattr, char *buf)
621{
622 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
623 struct lm63_data *data = lm63_update_device(dev);
624
625 return sprintf(buf, "%d\n", lut_temp_from_reg(data, attr->index)
626 + data->temp2_offset
627 - TEMP8_FROM_REG(data->lut_temp_hyst));
628}
629
630/*
631 * And now the other way around, user-space provides an absolute
632 * hysteresis value and we have to store a relative one
633 */
634static ssize_t set_temp2_crit_hyst(struct device *dev,
635 struct device_attribute *dummy,
636 const char *buf, size_t count)
637{
638 struct lm63_data *data = dev_get_drvdata(dev);
639 struct i2c_client *client = data->client;
640 long val;
641 int err;
642 long hyst;
643
644 err = kstrtol(buf, 10, &val);
645 if (err)
646 return err;
647
648 mutex_lock(&data->update_lock);
649 hyst = temp8_from_reg(data, 2) + data->temp2_offset - val;
650 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
651 HYST_TO_REG(hyst));
652 mutex_unlock(&data->update_lock);
653 return count;
654}
655
656/*
657 * Set conversion rate.
658 * client->update_lock must be held when calling this function.
659 */
660static void lm63_set_convrate(struct lm63_data *data, unsigned int interval)
661{
662 struct i2c_client *client = data->client;
663 unsigned int update_interval;
664 int i;
665
666 /* Shift calculations to avoid rounding errors */
667 interval <<= 6;
668
669 /* find the nearest update rate */
670 update_interval = (1 << (LM63_MAX_CONVRATE + 6)) * 1000
671 / data->max_convrate_hz;
672 for (i = 0; i < LM63_MAX_CONVRATE; i++, update_interval >>= 1)
673 if (interval >= update_interval * 3 / 4)
674 break;
675
676 i2c_smbus_write_byte_data(client, LM63_REG_CONVRATE, i);
677 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz, i);
678}
679
680static ssize_t show_update_interval(struct device *dev,
681 struct device_attribute *attr, char *buf)
682{
683 struct lm63_data *data = dev_get_drvdata(dev);
684
685 return sprintf(buf, "%u\n", data->update_interval);
686}
687
688static ssize_t set_update_interval(struct device *dev,
689 struct device_attribute *attr,
690 const char *buf, size_t count)
691{
692 struct lm63_data *data = dev_get_drvdata(dev);
693 unsigned long val;
694 int err;
695
696 err = kstrtoul(buf, 10, &val);
697 if (err)
698 return err;
699
700 mutex_lock(&data->update_lock);
701 lm63_set_convrate(data, clamp_val(val, 0, 100000));
702 mutex_unlock(&data->update_lock);
703
704 return count;
705}
706
707static ssize_t show_type(struct device *dev, struct device_attribute *attr,
708 char *buf)
709{
710 struct lm63_data *data = dev_get_drvdata(dev);
711
712 return sprintf(buf, data->trutherm ? "1\n" : "2\n");
713}
714
715static ssize_t set_type(struct device *dev, struct device_attribute *attr,
716 const char *buf, size_t count)
717{
718 struct lm63_data *data = dev_get_drvdata(dev);
719 struct i2c_client *client = data->client;
720 unsigned long val;
721 int ret;
722 u8 reg;
723
724 ret = kstrtoul(buf, 10, &val);
725 if (ret < 0)
726 return ret;
727 if (val != 1 && val != 2)
728 return -EINVAL;
729
730 mutex_lock(&data->update_lock);
731 data->trutherm = val == 1;
732 reg = i2c_smbus_read_byte_data(client, LM96163_REG_TRUTHERM) & ~0x02;
733 i2c_smbus_write_byte_data(client, LM96163_REG_TRUTHERM,
734 reg | (data->trutherm ? 0x02 : 0x00));
735 data->valid = 0;
736 mutex_unlock(&data->update_lock);
737
738 return count;
739}
740
741static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
742 char *buf)
743{
744 struct lm63_data *data = lm63_update_device(dev);
745 return sprintf(buf, "%u\n", data->alarms);
746}
747
748static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
749 char *buf)
750{
751 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
752 struct lm63_data *data = lm63_update_device(dev);
753 int bitnr = attr->index;
754
755 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
756}
757
758static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
759static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
760 set_fan, 1);
761
762static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1, 0);
763static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
764 show_pwm1_enable, set_pwm1_enable);
765static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
766 show_pwm1, set_pwm1, 1);
767static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
768 show_lut_temp, set_temp8, 3);
769static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp_hyst, S_IRUGO,
770 show_lut_temp_hyst, NULL, 3);
771static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
772 show_pwm1, set_pwm1, 2);
773static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IWUSR | S_IRUGO,
774 show_lut_temp, set_temp8, 4);
775static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp_hyst, S_IRUGO,
776 show_lut_temp_hyst, NULL, 4);
777static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IWUSR | S_IRUGO,
778 show_pwm1, set_pwm1, 3);
779static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp, S_IWUSR | S_IRUGO,
780 show_lut_temp, set_temp8, 5);
781static SENSOR_DEVICE_ATTR(pwm1_auto_point3_temp_hyst, S_IRUGO,
782 show_lut_temp_hyst, NULL, 5);
783static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IWUSR | S_IRUGO,
784 show_pwm1, set_pwm1, 4);
785static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp, S_IWUSR | S_IRUGO,
786 show_lut_temp, set_temp8, 6);
787static SENSOR_DEVICE_ATTR(pwm1_auto_point4_temp_hyst, S_IRUGO,
788 show_lut_temp_hyst, NULL, 6);
789static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IWUSR | S_IRUGO,
790 show_pwm1, set_pwm1, 5);
791static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp, S_IWUSR | S_IRUGO,
792 show_lut_temp, set_temp8, 7);
793static SENSOR_DEVICE_ATTR(pwm1_auto_point5_temp_hyst, S_IRUGO,
794 show_lut_temp_hyst, NULL, 7);
795static SENSOR_DEVICE_ATTR(pwm1_auto_point6_pwm, S_IWUSR | S_IRUGO,
796 show_pwm1, set_pwm1, 6);
797static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp, S_IWUSR | S_IRUGO,
798 show_lut_temp, set_temp8, 8);
799static SENSOR_DEVICE_ATTR(pwm1_auto_point6_temp_hyst, S_IRUGO,
800 show_lut_temp_hyst, NULL, 8);
801static SENSOR_DEVICE_ATTR(pwm1_auto_point7_pwm, S_IWUSR | S_IRUGO,
802 show_pwm1, set_pwm1, 7);
803static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp, S_IWUSR | S_IRUGO,
804 show_lut_temp, set_temp8, 9);
805static SENSOR_DEVICE_ATTR(pwm1_auto_point7_temp_hyst, S_IRUGO,
806 show_lut_temp_hyst, NULL, 9);
807static SENSOR_DEVICE_ATTR(pwm1_auto_point8_pwm, S_IWUSR | S_IRUGO,
808 show_pwm1, set_pwm1, 8);
809static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp, S_IWUSR | S_IRUGO,
810 show_lut_temp, set_temp8, 10);
811static SENSOR_DEVICE_ATTR(pwm1_auto_point8_temp_hyst, S_IRUGO,
812 show_lut_temp_hyst, NULL, 10);
813static SENSOR_DEVICE_ATTR(pwm1_auto_point9_pwm, S_IWUSR | S_IRUGO,
814 show_pwm1, set_pwm1, 9);
815static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp, S_IWUSR | S_IRUGO,
816 show_lut_temp, set_temp8, 11);
817static SENSOR_DEVICE_ATTR(pwm1_auto_point9_temp_hyst, S_IRUGO,
818 show_lut_temp_hyst, NULL, 11);
819static SENSOR_DEVICE_ATTR(pwm1_auto_point10_pwm, S_IWUSR | S_IRUGO,
820 show_pwm1, set_pwm1, 10);
821static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp, S_IWUSR | S_IRUGO,
822 show_lut_temp, set_temp8, 12);
823static SENSOR_DEVICE_ATTR(pwm1_auto_point10_temp_hyst, S_IRUGO,
824 show_lut_temp_hyst, NULL, 12);
825static SENSOR_DEVICE_ATTR(pwm1_auto_point11_pwm, S_IWUSR | S_IRUGO,
826 show_pwm1, set_pwm1, 11);
827static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp, S_IWUSR | S_IRUGO,
828 show_lut_temp, set_temp8, 13);
829static SENSOR_DEVICE_ATTR(pwm1_auto_point11_temp_hyst, S_IRUGO,
830 show_lut_temp_hyst, NULL, 13);
831static SENSOR_DEVICE_ATTR(pwm1_auto_point12_pwm, S_IWUSR | S_IRUGO,
832 show_pwm1, set_pwm1, 12);
833static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp, S_IWUSR | S_IRUGO,
834 show_lut_temp, set_temp8, 14);
835static SENSOR_DEVICE_ATTR(pwm1_auto_point12_temp_hyst, S_IRUGO,
836 show_lut_temp_hyst, NULL, 14);
837
838static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0);
839static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8,
840 set_temp8, 1);
841
842static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
843static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
844 set_temp11, 1);
845static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
846 set_temp11, 2);
847static SENSOR_DEVICE_ATTR(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
848 set_temp11, 3);
849static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8,
850 set_temp8, 2);
851static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
852 set_temp2_crit_hyst);
853
854static DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, set_type);
855
856/* Individual alarm files */
857static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
858static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
859static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
860static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
861static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
862static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
863/* Raw alarm file for compatibility */
864static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
865
866static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
867 set_update_interval);
868
869static struct attribute *lm63_attributes[] = {
870 &sensor_dev_attr_pwm1.dev_attr.attr,
871 &dev_attr_pwm1_enable.attr,
872 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
873 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
874 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
875 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
876 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
877 &sensor_dev_attr_pwm1_auto_point2_temp_hyst.dev_attr.attr,
878 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
879 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
880 &sensor_dev_attr_pwm1_auto_point3_temp_hyst.dev_attr.attr,
881 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
882 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
883 &sensor_dev_attr_pwm1_auto_point4_temp_hyst.dev_attr.attr,
884 &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
885 &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
886 &sensor_dev_attr_pwm1_auto_point5_temp_hyst.dev_attr.attr,
887 &sensor_dev_attr_pwm1_auto_point6_pwm.dev_attr.attr,
888 &sensor_dev_attr_pwm1_auto_point6_temp.dev_attr.attr,
889 &sensor_dev_attr_pwm1_auto_point6_temp_hyst.dev_attr.attr,
890 &sensor_dev_attr_pwm1_auto_point7_pwm.dev_attr.attr,
891 &sensor_dev_attr_pwm1_auto_point7_temp.dev_attr.attr,
892 &sensor_dev_attr_pwm1_auto_point7_temp_hyst.dev_attr.attr,
893 &sensor_dev_attr_pwm1_auto_point8_pwm.dev_attr.attr,
894 &sensor_dev_attr_pwm1_auto_point8_temp.dev_attr.attr,
895 &sensor_dev_attr_pwm1_auto_point8_temp_hyst.dev_attr.attr,
896
897 &sensor_dev_attr_temp1_input.dev_attr.attr,
898 &sensor_dev_attr_temp2_input.dev_attr.attr,
899 &sensor_dev_attr_temp2_min.dev_attr.attr,
900 &sensor_dev_attr_temp1_max.dev_attr.attr,
901 &sensor_dev_attr_temp2_max.dev_attr.attr,
902 &sensor_dev_attr_temp2_offset.dev_attr.attr,
903 &sensor_dev_attr_temp2_crit.dev_attr.attr,
904 &dev_attr_temp2_crit_hyst.attr,
905
906 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
907 &sensor_dev_attr_temp2_fault.dev_attr.attr,
908 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
909 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
910 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
911 &dev_attr_alarms.attr,
912 &dev_attr_update_interval.attr,
913 NULL
914};
915
916static struct attribute *lm63_attributes_temp2_type[] = {
917 &dev_attr_temp2_type.attr,
918 NULL
919};
920
921static const struct attribute_group lm63_group_temp2_type = {
922 .attrs = lm63_attributes_temp2_type,
923};
924
925static struct attribute *lm63_attributes_extra_lut[] = {
926 &sensor_dev_attr_pwm1_auto_point9_pwm.dev_attr.attr,
927 &sensor_dev_attr_pwm1_auto_point9_temp.dev_attr.attr,
928 &sensor_dev_attr_pwm1_auto_point9_temp_hyst.dev_attr.attr,
929 &sensor_dev_attr_pwm1_auto_point10_pwm.dev_attr.attr,
930 &sensor_dev_attr_pwm1_auto_point10_temp.dev_attr.attr,
931 &sensor_dev_attr_pwm1_auto_point10_temp_hyst.dev_attr.attr,
932 &sensor_dev_attr_pwm1_auto_point11_pwm.dev_attr.attr,
933 &sensor_dev_attr_pwm1_auto_point11_temp.dev_attr.attr,
934 &sensor_dev_attr_pwm1_auto_point11_temp_hyst.dev_attr.attr,
935 &sensor_dev_attr_pwm1_auto_point12_pwm.dev_attr.attr,
936 &sensor_dev_attr_pwm1_auto_point12_temp.dev_attr.attr,
937 &sensor_dev_attr_pwm1_auto_point12_temp_hyst.dev_attr.attr,
938 NULL
939};
940
941static const struct attribute_group lm63_group_extra_lut = {
942 .attrs = lm63_attributes_extra_lut,
943};
944
945/*
946 * On LM63, temp2_crit can be set only once, which should be job
947 * of the bootloader.
948 * On LM64, temp2_crit can always be set.
949 * On LM96163, temp2_crit can be set if bit 1 of the configuration
950 * register is true.
951 */
952static umode_t lm63_attribute_mode(struct kobject *kobj,
953 struct attribute *attr, int index)
954{
955 struct device *dev = container_of(kobj, struct device, kobj);
956 struct lm63_data *data = dev_get_drvdata(dev);
957
958 if (attr == &sensor_dev_attr_temp2_crit.dev_attr.attr
959 && (data->kind == lm64 ||
960 (data->kind == lm96163 && (data->config & 0x02))))
961 return attr->mode | S_IWUSR;
962
963 return attr->mode;
964}
965
966static const struct attribute_group lm63_group = {
967 .is_visible = lm63_attribute_mode,
968 .attrs = lm63_attributes,
969};
970
971static struct attribute *lm63_attributes_fan1[] = {
972 &sensor_dev_attr_fan1_input.dev_attr.attr,
973 &sensor_dev_attr_fan1_min.dev_attr.attr,
974
975 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
976 NULL
977};
978
979static const struct attribute_group lm63_group_fan1 = {
980 .attrs = lm63_attributes_fan1,
981};
982
983/*
984 * Real code
985 */
986
987/* Return 0 if detection is successful, -ENODEV otherwise */
988static int lm63_detect(struct i2c_client *client,
989 struct i2c_board_info *info)
990{
991 struct i2c_adapter *adapter = client->adapter;
992 u8 man_id, chip_id, reg_config1, reg_config2;
993 u8 reg_alert_status, reg_alert_mask;
994 int address = client->addr;
995
996 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
997 return -ENODEV;
998
999 man_id = i2c_smbus_read_byte_data(client, LM63_REG_MAN_ID);
1000 chip_id = i2c_smbus_read_byte_data(client, LM63_REG_CHIP_ID);
1001
1002 reg_config1 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
1003 reg_config2 = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG2);
1004 reg_alert_status = i2c_smbus_read_byte_data(client,
1005 LM63_REG_ALERT_STATUS);
1006 reg_alert_mask = i2c_smbus_read_byte_data(client, LM63_REG_ALERT_MASK);
1007
1008 if (man_id != 0x01 /* National Semiconductor */
1009 || (reg_config1 & 0x18) != 0x00
1010 || (reg_config2 & 0xF8) != 0x00
1011 || (reg_alert_status & 0x20) != 0x00
1012 || (reg_alert_mask & 0xA4) != 0xA4) {
1013 dev_dbg(&adapter->dev,
1014 "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
1015 man_id, chip_id);
1016 return -ENODEV;
1017 }
1018
1019 if (chip_id == 0x41 && address == 0x4c)
1020 strlcpy(info->type, "lm63", I2C_NAME_SIZE);
1021 else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))
1022 strlcpy(info->type, "lm64", I2C_NAME_SIZE);
1023 else if (chip_id == 0x49 && address == 0x4c)
1024 strlcpy(info->type, "lm96163", I2C_NAME_SIZE);
1025 else
1026 return -ENODEV;
1027
1028 return 0;
1029}
1030
1031/*
1032 * Ideally we shouldn't have to initialize anything, since the BIOS
1033 * should have taken care of everything
1034 */
1035static void lm63_init_client(struct lm63_data *data)
1036{
1037 struct i2c_client *client = data->client;
1038 struct device *dev = &client->dev;
1039 u8 convrate;
1040
1041 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
1042 data->config_fan = i2c_smbus_read_byte_data(client,
1043 LM63_REG_CONFIG_FAN);
1044
1045 /* Start converting if needed */
1046 if (data->config & 0x40) { /* standby */
1047 dev_dbg(dev, "Switching to operational mode\n");
1048 data->config &= 0xA7;
1049 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
1050 data->config);
1051 }
1052 /* Tachometer is always enabled on LM64 */
1053 if (data->kind == lm64)
1054 data->config |= 0x04;
1055
1056 /* We may need pwm1_freq before ever updating the client data */
1057 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
1058 if (data->pwm1_freq == 0)
1059 data->pwm1_freq = 1;
1060
1061 switch (data->kind) {
1062 case lm63:
1063 case lm64:
1064 data->max_convrate_hz = LM63_MAX_CONVRATE_HZ;
1065 data->lut_size = 8;
1066 break;
1067 case lm96163:
1068 data->max_convrate_hz = LM96163_MAX_CONVRATE_HZ;
1069 data->lut_size = 12;
1070 data->trutherm
1071 = i2c_smbus_read_byte_data(client,
1072 LM96163_REG_TRUTHERM) & 0x02;
1073 break;
1074 }
1075 convrate = i2c_smbus_read_byte_data(client, LM63_REG_CONVRATE);
1076 if (unlikely(convrate > LM63_MAX_CONVRATE))
1077 convrate = LM63_MAX_CONVRATE;
1078 data->update_interval = UPDATE_INTERVAL(data->max_convrate_hz,
1079 convrate);
1080
1081 /*
1082 * For LM96163, check if high resolution PWM
1083 * and unsigned temperature format is enabled.
1084 */
1085 if (data->kind == lm96163) {
1086 u8 config_enhanced
1087 = i2c_smbus_read_byte_data(client,
1088 LM96163_REG_CONFIG_ENHANCED);
1089 if (config_enhanced & 0x20)
1090 data->lut_temp_highres = true;
1091 if ((config_enhanced & 0x10)
1092 && !(data->config_fan & 0x08) && data->pwm1_freq == 8)
1093 data->pwm_highres = true;
1094 if (config_enhanced & 0x08)
1095 data->remote_unsigned = true;
1096 }
1097
1098 /* Show some debug info about the LM63 configuration */
1099 if (data->kind == lm63)
1100 dev_dbg(dev, "Alert/tach pin configured for %s\n",
1101 (data->config & 0x04) ? "tachometer input" :
1102 "alert output");
1103 dev_dbg(dev, "PWM clock %s kHz, output frequency %u Hz\n",
1104 (data->config_fan & 0x08) ? "1.4" : "360",
1105 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
1106 dev_dbg(dev, "PWM output active %s, %s mode\n",
1107 (data->config_fan & 0x10) ? "low" : "high",
1108 (data->config_fan & 0x20) ? "manual" : "auto");
1109}
1110
1111static int lm63_probe(struct i2c_client *client,
1112 const struct i2c_device_id *id)
1113{
1114 struct device *dev = &client->dev;
1115 struct device *hwmon_dev;
1116 struct lm63_data *data;
1117 int groups = 0;
1118
1119 data = devm_kzalloc(dev, sizeof(struct lm63_data), GFP_KERNEL);
1120 if (!data)
1121 return -ENOMEM;
1122
1123 data->client = client;
1124 mutex_init(&data->update_lock);
1125
1126 /* Set the device type */
1127 data->kind = id->driver_data;
1128 if (data->kind == lm64)
1129 data->temp2_offset = 16000;
1130
1131 /* Initialize chip */
1132 lm63_init_client(data);
1133
1134 /* Register sysfs hooks */
1135 data->groups[groups++] = &lm63_group;
1136 if (data->config & 0x04) /* tachometer enabled */
1137 data->groups[groups++] = &lm63_group_fan1;
1138
1139 if (data->kind == lm96163) {
1140 data->groups[groups++] = &lm63_group_temp2_type;
1141 data->groups[groups++] = &lm63_group_extra_lut;
1142 }
1143
1144 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
1145 data, data->groups);
1146 return PTR_ERR_OR_ZERO(hwmon_dev);
1147}
1148
1149/*
1150 * Driver data (common to all clients)
1151 */
1152
1153static const struct i2c_device_id lm63_id[] = {
1154 { "lm63", lm63 },
1155 { "lm64", lm64 },
1156 { "lm96163", lm96163 },
1157 { }
1158};
1159MODULE_DEVICE_TABLE(i2c, lm63_id);
1160
1161static struct i2c_driver lm63_driver = {
1162 .class = I2C_CLASS_HWMON,
1163 .driver = {
1164 .name = "lm63",
1165 },
1166 .probe = lm63_probe,
1167 .id_table = lm63_id,
1168 .detect = lm63_detect,
1169 .address_list = normal_i2c,
1170};
1171
1172module_i2c_driver(lm63_driver);
1173
1174MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
1175MODULE_DESCRIPTION("LM63 driver");
1176MODULE_LICENSE("GPL");
1/*
2 * lm63.c - driver for the National Semiconductor LM63 temperature sensor
3 * with integrated fan control
4 * Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.org>
5 * Based on the lm90 driver.
6 *
7 * The LM63 is a sensor chip made by National Semiconductor. It measures
8 * two temperatures (its own and one external one) and the speed of one
9 * fan, those speed it can additionally control. Complete datasheet can be
10 * obtained from National's website at:
11 * http://www.national.com/pf/LM/LM63.html
12 *
13 * The LM63 is basically an LM86 with fan speed monitoring and control
14 * capabilities added. It misses some of the LM86 features though:
15 * - No low limit for local temperature.
16 * - No critical limit for local temperature.
17 * - Critical limit for remote temperature can be changed only once. We
18 * will consider that the critical limit is read-only.
19 *
20 * The datasheet isn't very clear about what the tachometer reading is.
21 * I had a explanation from National Semiconductor though. The two lower
22 * bits of the read value have to be masked out. The value is still 16 bit
23 * in width.
24 *
25 * This program is free software; you can redistribute it and/or modify
26 * it under the terms of the GNU General Public License as published by
27 * the Free Software Foundation; either version 2 of the License, or
28 * (at your option) any later version.
29 *
30 * This program is distributed in the hope that it will be useful,
31 * but WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
33 * GNU General Public License for more details.
34 *
35 * You should have received a copy of the GNU General Public License
36 * along with this program; if not, write to the Free Software
37 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
38 */
39
40#include <linux/module.h>
41#include <linux/init.h>
42#include <linux/slab.h>
43#include <linux/jiffies.h>
44#include <linux/i2c.h>
45#include <linux/hwmon-sysfs.h>
46#include <linux/hwmon.h>
47#include <linux/err.h>
48#include <linux/mutex.h>
49#include <linux/sysfs.h>
50
51/*
52 * Addresses to scan
53 * Address is fully defined internally and cannot be changed.
54 */
55
56static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, I2C_CLIENT_END };
57
58/*
59 * The LM63 registers
60 */
61
62#define LM63_REG_CONFIG1 0x03
63#define LM63_REG_CONFIG2 0xBF
64#define LM63_REG_CONFIG_FAN 0x4A
65
66#define LM63_REG_TACH_COUNT_MSB 0x47
67#define LM63_REG_TACH_COUNT_LSB 0x46
68#define LM63_REG_TACH_LIMIT_MSB 0x49
69#define LM63_REG_TACH_LIMIT_LSB 0x48
70
71#define LM63_REG_PWM_VALUE 0x4C
72#define LM63_REG_PWM_FREQ 0x4D
73
74#define LM63_REG_LOCAL_TEMP 0x00
75#define LM63_REG_LOCAL_HIGH 0x05
76
77#define LM63_REG_REMOTE_TEMP_MSB 0x01
78#define LM63_REG_REMOTE_TEMP_LSB 0x10
79#define LM63_REG_REMOTE_OFFSET_MSB 0x11
80#define LM63_REG_REMOTE_OFFSET_LSB 0x12
81#define LM63_REG_REMOTE_HIGH_MSB 0x07
82#define LM63_REG_REMOTE_HIGH_LSB 0x13
83#define LM63_REG_REMOTE_LOW_MSB 0x08
84#define LM63_REG_REMOTE_LOW_LSB 0x14
85#define LM63_REG_REMOTE_TCRIT 0x19
86#define LM63_REG_REMOTE_TCRIT_HYST 0x21
87
88#define LM63_REG_ALERT_STATUS 0x02
89#define LM63_REG_ALERT_MASK 0x16
90
91#define LM63_REG_MAN_ID 0xFE
92#define LM63_REG_CHIP_ID 0xFF
93
94/*
95 * Conversions and various macros
96 * For tachometer counts, the LM63 uses 16-bit values.
97 * For local temperature and high limit, remote critical limit and hysteresis
98 * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
99 * For remote temperature, low and high limits, it uses signed 11-bit values
100 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
101 * For LM64 the actual remote diode temperature is 16 degree Celsius higher
102 * than the register reading. Remote temperature setpoints have to be
103 * adapted accordingly.
104 */
105
106#define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
107 5400000 / (reg))
108#define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \
109 (5400000 / (val)) & 0xFFFC)
110#define TEMP8_FROM_REG(reg) ((reg) * 1000)
111#define TEMP8_TO_REG(val) ((val) <= -128000 ? -128 : \
112 (val) >= 127000 ? 127 : \
113 (val) < 0 ? ((val) - 500) / 1000 : \
114 ((val) + 500) / 1000)
115#define TEMP11_FROM_REG(reg) ((reg) / 32 * 125)
116#define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \
117 (val) >= 127875 ? 0x7FE0 : \
118 (val) < 0 ? ((val) - 62) / 125 * 32 : \
119 ((val) + 62) / 125 * 32)
120#define HYST_TO_REG(val) ((val) <= 0 ? 0 : \
121 (val) >= 127000 ? 127 : \
122 ((val) + 500) / 1000)
123
124/*
125 * Functions declaration
126 */
127
128static int lm63_probe(struct i2c_client *client,
129 const struct i2c_device_id *id);
130static int lm63_remove(struct i2c_client *client);
131
132static struct lm63_data *lm63_update_device(struct device *dev);
133
134static int lm63_detect(struct i2c_client *client, struct i2c_board_info *info);
135static void lm63_init_client(struct i2c_client *client);
136
137enum chips { lm63, lm64 };
138
139/*
140 * Driver data (common to all clients)
141 */
142
143static const struct i2c_device_id lm63_id[] = {
144 { "lm63", lm63 },
145 { "lm64", lm64 },
146 { }
147};
148MODULE_DEVICE_TABLE(i2c, lm63_id);
149
150static struct i2c_driver lm63_driver = {
151 .class = I2C_CLASS_HWMON,
152 .driver = {
153 .name = "lm63",
154 },
155 .probe = lm63_probe,
156 .remove = lm63_remove,
157 .id_table = lm63_id,
158 .detect = lm63_detect,
159 .address_list = normal_i2c,
160};
161
162/*
163 * Client data (each client gets its own)
164 */
165
166struct lm63_data {
167 struct device *hwmon_dev;
168 struct mutex update_lock;
169 char valid; /* zero until following fields are valid */
170 unsigned long last_updated; /* in jiffies */
171 int kind;
172 int temp2_offset;
173
174 /* registers values */
175 u8 config, config_fan;
176 u16 fan[2]; /* 0: input
177 1: low limit */
178 u8 pwm1_freq;
179 u8 pwm1_value;
180 s8 temp8[3]; /* 0: local input
181 1: local high limit
182 2: remote critical limit */
183 s16 temp11[3]; /* 0: remote input
184 1: remote low limit
185 2: remote high limit */
186 u8 temp2_crit_hyst;
187 u8 alarms;
188};
189
190/*
191 * Sysfs callback functions and files
192 */
193
194static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
195 char *buf)
196{
197 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
198 struct lm63_data *data = lm63_update_device(dev);
199 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
200}
201
202static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
203 const char *buf, size_t count)
204{
205 struct i2c_client *client = to_i2c_client(dev);
206 struct lm63_data *data = i2c_get_clientdata(client);
207 unsigned long val = simple_strtoul(buf, NULL, 10);
208
209 mutex_lock(&data->update_lock);
210 data->fan[1] = FAN_TO_REG(val);
211 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
212 data->fan[1] & 0xFF);
213 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
214 data->fan[1] >> 8);
215 mutex_unlock(&data->update_lock);
216 return count;
217}
218
219static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,
220 char *buf)
221{
222 struct lm63_data *data = lm63_update_device(dev);
223 return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ?
224 255 : (data->pwm1_value * 255 + data->pwm1_freq) /
225 (2 * data->pwm1_freq));
226}
227
228static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
229 const char *buf, size_t count)
230{
231 struct i2c_client *client = to_i2c_client(dev);
232 struct lm63_data *data = i2c_get_clientdata(client);
233 unsigned long val;
234
235 if (!(data->config_fan & 0x20)) /* register is read-only */
236 return -EPERM;
237
238 val = simple_strtoul(buf, NULL, 10);
239 mutex_lock(&data->update_lock);
240 data->pwm1_value = val <= 0 ? 0 :
241 val >= 255 ? 2 * data->pwm1_freq :
242 (val * data->pwm1_freq * 2 + 127) / 255;
243 i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);
244 mutex_unlock(&data->update_lock);
245 return count;
246}
247
248static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy,
249 char *buf)
250{
251 struct lm63_data *data = lm63_update_device(dev);
252 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
253}
254
255/*
256 * There are 8bit registers for both local(temp1) and remote(temp2) sensor.
257 * For remote sensor registers temp2_offset has to be considered,
258 * for local sensor it must not.
259 * So we need separate 8bit accessors for local and remote sensor.
260 */
261static ssize_t show_local_temp8(struct device *dev,
262 struct device_attribute *devattr,
263 char *buf)
264{
265 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
266 struct lm63_data *data = lm63_update_device(dev);
267 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
268}
269
270static ssize_t show_remote_temp8(struct device *dev,
271 struct device_attribute *devattr,
272 char *buf)
273{
274 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
275 struct lm63_data *data = lm63_update_device(dev);
276 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])
277 + data->temp2_offset);
278}
279
280static ssize_t set_local_temp8(struct device *dev,
281 struct device_attribute *dummy,
282 const char *buf, size_t count)
283{
284 struct i2c_client *client = to_i2c_client(dev);
285 struct lm63_data *data = i2c_get_clientdata(client);
286 long val = simple_strtol(buf, NULL, 10);
287
288 mutex_lock(&data->update_lock);
289 data->temp8[1] = TEMP8_TO_REG(val);
290 i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]);
291 mutex_unlock(&data->update_lock);
292 return count;
293}
294
295static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
296 char *buf)
297{
298 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
299 struct lm63_data *data = lm63_update_device(dev);
300 return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index])
301 + data->temp2_offset);
302}
303
304static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
305 const char *buf, size_t count)
306{
307 static const u8 reg[4] = {
308 LM63_REG_REMOTE_LOW_MSB,
309 LM63_REG_REMOTE_LOW_LSB,
310 LM63_REG_REMOTE_HIGH_MSB,
311 LM63_REG_REMOTE_HIGH_LSB,
312 };
313
314 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
315 struct i2c_client *client = to_i2c_client(dev);
316 struct lm63_data *data = i2c_get_clientdata(client);
317 long val = simple_strtol(buf, NULL, 10);
318 int nr = attr->index;
319
320 mutex_lock(&data->update_lock);
321 data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset);
322 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
323 data->temp11[nr] >> 8);
324 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
325 data->temp11[nr] & 0xff);
326 mutex_unlock(&data->update_lock);
327 return count;
328}
329
330/* Hysteresis register holds a relative value, while we want to present
331 an absolute to user-space */
332static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
333 char *buf)
334{
335 struct lm63_data *data = lm63_update_device(dev);
336 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2])
337 + data->temp2_offset
338 - TEMP8_FROM_REG(data->temp2_crit_hyst));
339}
340
341/* And now the other way around, user-space provides an absolute
342 hysteresis value and we have to store a relative one */
343static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
344 const char *buf, size_t count)
345{
346 struct i2c_client *client = to_i2c_client(dev);
347 struct lm63_data *data = i2c_get_clientdata(client);
348 long val = simple_strtol(buf, NULL, 10);
349 long hyst;
350
351 mutex_lock(&data->update_lock);
352 hyst = TEMP8_FROM_REG(data->temp8[2]) + data->temp2_offset - val;
353 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
354 HYST_TO_REG(hyst));
355 mutex_unlock(&data->update_lock);
356 return count;
357}
358
359static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
360 char *buf)
361{
362 struct lm63_data *data = lm63_update_device(dev);
363 return sprintf(buf, "%u\n", data->alarms);
364}
365
366static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
367 char *buf)
368{
369 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
370 struct lm63_data *data = lm63_update_device(dev);
371 int bitnr = attr->index;
372
373 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
374}
375
376static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
377static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
378 set_fan, 1);
379
380static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1);
381static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL);
382
383static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0);
384static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8,
385 set_local_temp8, 1);
386
387static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
388static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
389 set_temp11, 1);
390static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
391 set_temp11, 2);
392/*
393 * On LM63, temp2_crit can be set only once, which should be job
394 * of the bootloader.
395 */
396static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8,
397 NULL, 2);
398static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
399 set_temp2_crit_hyst);
400
401/* Individual alarm files */
402static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
403static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
404static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
405static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
406static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
407static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
408/* Raw alarm file for compatibility */
409static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
410
411static struct attribute *lm63_attributes[] = {
412 &dev_attr_pwm1.attr,
413 &dev_attr_pwm1_enable.attr,
414 &sensor_dev_attr_temp1_input.dev_attr.attr,
415 &sensor_dev_attr_temp2_input.dev_attr.attr,
416 &sensor_dev_attr_temp2_min.dev_attr.attr,
417 &sensor_dev_attr_temp1_max.dev_attr.attr,
418 &sensor_dev_attr_temp2_max.dev_attr.attr,
419 &sensor_dev_attr_temp2_crit.dev_attr.attr,
420 &dev_attr_temp2_crit_hyst.attr,
421
422 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
423 &sensor_dev_attr_temp2_fault.dev_attr.attr,
424 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
425 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
426 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
427 &dev_attr_alarms.attr,
428 NULL
429};
430
431static const struct attribute_group lm63_group = {
432 .attrs = lm63_attributes,
433};
434
435static struct attribute *lm63_attributes_fan1[] = {
436 &sensor_dev_attr_fan1_input.dev_attr.attr,
437 &sensor_dev_attr_fan1_min.dev_attr.attr,
438
439 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
440 NULL
441};
442
443static const struct attribute_group lm63_group_fan1 = {
444 .attrs = lm63_attributes_fan1,
445};
446
447/*
448 * Real code
449 */
450
451/* Return 0 if detection is successful, -ENODEV otherwise */
452static int lm63_detect(struct i2c_client *new_client,
453 struct i2c_board_info *info)
454{
455 struct i2c_adapter *adapter = new_client->adapter;
456 u8 man_id, chip_id, reg_config1, reg_config2;
457 u8 reg_alert_status, reg_alert_mask;
458 int address = new_client->addr;
459
460 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
461 return -ENODEV;
462
463 man_id = i2c_smbus_read_byte_data(new_client, LM63_REG_MAN_ID);
464 chip_id = i2c_smbus_read_byte_data(new_client, LM63_REG_CHIP_ID);
465
466 reg_config1 = i2c_smbus_read_byte_data(new_client,
467 LM63_REG_CONFIG1);
468 reg_config2 = i2c_smbus_read_byte_data(new_client,
469 LM63_REG_CONFIG2);
470 reg_alert_status = i2c_smbus_read_byte_data(new_client,
471 LM63_REG_ALERT_STATUS);
472 reg_alert_mask = i2c_smbus_read_byte_data(new_client,
473 LM63_REG_ALERT_MASK);
474
475 if (man_id != 0x01 /* National Semiconductor */
476 || (reg_config1 & 0x18) != 0x00
477 || (reg_config2 & 0xF8) != 0x00
478 || (reg_alert_status & 0x20) != 0x00
479 || (reg_alert_mask & 0xA4) != 0xA4) {
480 dev_dbg(&adapter->dev,
481 "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n",
482 man_id, chip_id);
483 return -ENODEV;
484 }
485
486 if (chip_id == 0x41 && address == 0x4c)
487 strlcpy(info->type, "lm63", I2C_NAME_SIZE);
488 else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e))
489 strlcpy(info->type, "lm64", I2C_NAME_SIZE);
490 else
491 return -ENODEV;
492
493 return 0;
494}
495
496static int lm63_probe(struct i2c_client *new_client,
497 const struct i2c_device_id *id)
498{
499 struct lm63_data *data;
500 int err;
501
502 data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL);
503 if (!data) {
504 err = -ENOMEM;
505 goto exit;
506 }
507
508 i2c_set_clientdata(new_client, data);
509 data->valid = 0;
510 mutex_init(&data->update_lock);
511
512 /* Set the device type */
513 data->kind = id->driver_data;
514 if (data->kind == lm64)
515 data->temp2_offset = 16000;
516
517 /* Initialize chip */
518 lm63_init_client(new_client);
519
520 /* Register sysfs hooks */
521 if ((err = sysfs_create_group(&new_client->dev.kobj,
522 &lm63_group)))
523 goto exit_free;
524 if (data->config & 0x04) { /* tachometer enabled */
525 if ((err = sysfs_create_group(&new_client->dev.kobj,
526 &lm63_group_fan1)))
527 goto exit_remove_files;
528 }
529
530 data->hwmon_dev = hwmon_device_register(&new_client->dev);
531 if (IS_ERR(data->hwmon_dev)) {
532 err = PTR_ERR(data->hwmon_dev);
533 goto exit_remove_files;
534 }
535
536 return 0;
537
538exit_remove_files:
539 sysfs_remove_group(&new_client->dev.kobj, &lm63_group);
540 sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1);
541exit_free:
542 kfree(data);
543exit:
544 return err;
545}
546
547/* Idealy we shouldn't have to initialize anything, since the BIOS
548 should have taken care of everything */
549static void lm63_init_client(struct i2c_client *client)
550{
551 struct lm63_data *data = i2c_get_clientdata(client);
552
553 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
554 data->config_fan = i2c_smbus_read_byte_data(client,
555 LM63_REG_CONFIG_FAN);
556
557 /* Start converting if needed */
558 if (data->config & 0x40) { /* standby */
559 dev_dbg(&client->dev, "Switching to operational mode\n");
560 data->config &= 0xA7;
561 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
562 data->config);
563 }
564
565 /* We may need pwm1_freq before ever updating the client data */
566 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
567 if (data->pwm1_freq == 0)
568 data->pwm1_freq = 1;
569
570 /* Show some debug info about the LM63 configuration */
571 dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
572 (data->config & 0x04) ? "tachometer input" :
573 "alert output");
574 dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
575 (data->config_fan & 0x08) ? "1.4" : "360",
576 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
577 dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
578 (data->config_fan & 0x10) ? "low" : "high",
579 (data->config_fan & 0x20) ? "manual" : "auto");
580}
581
582static int lm63_remove(struct i2c_client *client)
583{
584 struct lm63_data *data = i2c_get_clientdata(client);
585
586 hwmon_device_unregister(data->hwmon_dev);
587 sysfs_remove_group(&client->dev.kobj, &lm63_group);
588 sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
589
590 kfree(data);
591 return 0;
592}
593
594static struct lm63_data *lm63_update_device(struct device *dev)
595{
596 struct i2c_client *client = to_i2c_client(dev);
597 struct lm63_data *data = i2c_get_clientdata(client);
598
599 mutex_lock(&data->update_lock);
600
601 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
602 if (data->config & 0x04) { /* tachometer enabled */
603 /* order matters for fan1_input */
604 data->fan[0] = i2c_smbus_read_byte_data(client,
605 LM63_REG_TACH_COUNT_LSB) & 0xFC;
606 data->fan[0] |= i2c_smbus_read_byte_data(client,
607 LM63_REG_TACH_COUNT_MSB) << 8;
608 data->fan[1] = (i2c_smbus_read_byte_data(client,
609 LM63_REG_TACH_LIMIT_LSB) & 0xFC)
610 | (i2c_smbus_read_byte_data(client,
611 LM63_REG_TACH_LIMIT_MSB) << 8);
612 }
613
614 data->pwm1_freq = i2c_smbus_read_byte_data(client,
615 LM63_REG_PWM_FREQ);
616 if (data->pwm1_freq == 0)
617 data->pwm1_freq = 1;
618 data->pwm1_value = i2c_smbus_read_byte_data(client,
619 LM63_REG_PWM_VALUE);
620
621 data->temp8[0] = i2c_smbus_read_byte_data(client,
622 LM63_REG_LOCAL_TEMP);
623 data->temp8[1] = i2c_smbus_read_byte_data(client,
624 LM63_REG_LOCAL_HIGH);
625
626 /* order matters for temp2_input */
627 data->temp11[0] = i2c_smbus_read_byte_data(client,
628 LM63_REG_REMOTE_TEMP_MSB) << 8;
629 data->temp11[0] |= i2c_smbus_read_byte_data(client,
630 LM63_REG_REMOTE_TEMP_LSB);
631 data->temp11[1] = (i2c_smbus_read_byte_data(client,
632 LM63_REG_REMOTE_LOW_MSB) << 8)
633 | i2c_smbus_read_byte_data(client,
634 LM63_REG_REMOTE_LOW_LSB);
635 data->temp11[2] = (i2c_smbus_read_byte_data(client,
636 LM63_REG_REMOTE_HIGH_MSB) << 8)
637 | i2c_smbus_read_byte_data(client,
638 LM63_REG_REMOTE_HIGH_LSB);
639 data->temp8[2] = i2c_smbus_read_byte_data(client,
640 LM63_REG_REMOTE_TCRIT);
641 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
642 LM63_REG_REMOTE_TCRIT_HYST);
643
644 data->alarms = i2c_smbus_read_byte_data(client,
645 LM63_REG_ALERT_STATUS) & 0x7F;
646
647 data->last_updated = jiffies;
648 data->valid = 1;
649 }
650
651 mutex_unlock(&data->update_lock);
652
653 return data;
654}
655
656static int __init sensors_lm63_init(void)
657{
658 return i2c_add_driver(&lm63_driver);
659}
660
661static void __exit sensors_lm63_exit(void)
662{
663 i2c_del_driver(&lm63_driver);
664}
665
666MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
667MODULE_DESCRIPTION("LM63 driver");
668MODULE_LICENSE("GPL");
669
670module_init(sensors_lm63_init);
671module_exit(sensors_lm63_exit);