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