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[linux.git] / drivers / hwmon / lm63.c
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1da177e4
LT		 1/*
2 * lm63.c - driver for the National Semiconductor LM63 temperature sensor
3 * with integrated fan control
2d45771e 4 * Copyright (C) 2004-2006 Jean Delvare <[email protected]>
1da177e4
LT		 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
1da177e4
LT		 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>
10c08f81 45#include <linux/hwmon-sysfs.h>
943b0830
MH		 46#include <linux/hwmon.h>
47#include <linux/err.h>
9a61bf63 48#include <linux/mutex.h>
0e39e01c 49#include <linux/sysfs.h>
1da177e4
LT		 50
51/*
52 * Addresses to scan
53 * Address is fully defined internally and cannot be changed.
54 */
55
25e9c86d 56static const unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END };
1da177e4
LT		 57
58/*
59 * Insmod parameters
60 */
61
f4b50261 62I2C_CLIENT_INSMOD_1(lm63);
1da177e4
LT		 63
64/*
65 * The LM63 registers
66 */
67
68#define LM63_REG_CONFIG1 0x03
69#define LM63_REG_CONFIG2 0xBF
70#define LM63_REG_CONFIG_FAN 0x4A
71
72#define LM63_REG_TACH_COUNT_MSB 0x47
73#define LM63_REG_TACH_COUNT_LSB 0x46
74#define LM63_REG_TACH_LIMIT_MSB 0x49
75#define LM63_REG_TACH_LIMIT_LSB 0x48
76
77#define LM63_REG_PWM_VALUE 0x4C
78#define LM63_REG_PWM_FREQ 0x4D
79
80#define LM63_REG_LOCAL_TEMP 0x00
81#define LM63_REG_LOCAL_HIGH 0x05
82
83#define LM63_REG_REMOTE_TEMP_MSB 0x01
84#define LM63_REG_REMOTE_TEMP_LSB 0x10
85#define LM63_REG_REMOTE_OFFSET_MSB 0x11
86#define LM63_REG_REMOTE_OFFSET_LSB 0x12
87#define LM63_REG_REMOTE_HIGH_MSB 0x07
88#define LM63_REG_REMOTE_HIGH_LSB 0x13
89#define LM63_REG_REMOTE_LOW_MSB 0x08
90#define LM63_REG_REMOTE_LOW_LSB 0x14
91#define LM63_REG_REMOTE_TCRIT 0x19
92#define LM63_REG_REMOTE_TCRIT_HYST 0x21
93
94#define LM63_REG_ALERT_STATUS 0x02
95#define LM63_REG_ALERT_MASK 0x16
96
97#define LM63_REG_MAN_ID 0xFE
98#define LM63_REG_CHIP_ID 0xFF
99
100/*
101 * Conversions and various macros
102 * For tachometer counts, the LM63 uses 16-bit values.
103 * For local temperature and high limit, remote critical limit and hysteresis
44bbe87e 104 * value, it uses signed 8-bit values with LSB = 1 degree Celsius.
1da177e4 105 * For remote temperature, low and high limits, it uses signed 11-bit values
44bbe87e 106 * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers.
1da177e4
LT		 107 */
108
109#define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \
110 5400000 / (reg))
111#define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \
112 (5400000 / (val)) & 0xFFFC)
113#define TEMP8_FROM_REG(reg) ((reg) * 1000)
114#define TEMP8_TO_REG(val) ((val) <= -128000 ? -128 : \
115 (val) >= 127000 ? 127 : \
116 (val) < 0 ? ((val) - 500) / 1000 : \
117 ((val) + 500) / 1000)
118#define TEMP11_FROM_REG(reg) ((reg) / 32 * 125)
119#define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \
120 (val) >= 127875 ? 0x7FE0 : \
121 (val) < 0 ? ((val) - 62) / 125 * 32 : \
122 ((val) + 62) / 125 * 32)
123#define HYST_TO_REG(val) ((val) <= 0 ? 0 : \
124 (val) >= 127000 ? 127 : \
125 ((val) + 500) / 1000)
126
127/*
128 * Functions declaration
129 */
130
131static int lm63_attach_adapter(struct i2c_adapter *adapter);
132static int lm63_detach_client(struct i2c_client *client);
133
134static struct lm63_data *lm63_update_device(struct device *dev);
135
136static int lm63_detect(struct i2c_adapter *adapter, int address, int kind);
137static void lm63_init_client(struct i2c_client *client);
138
139/*
140 * Driver data (common to all clients)
141 */
142
143static struct i2c_driver lm63_driver = {
cdaf7934 144 .driver = {
cdaf7934
LR		 145 .name = "lm63",
146 },
1da177e4
LT		 147 .attach_adapter = lm63_attach_adapter,
148 .detach_client = lm63_detach_client,
149};
150
151/*
152 * Client data (each client gets its own)
153 */
154
155struct lm63_data {
156 struct i2c_client client;
1beeffe4 157 struct device *hwmon_dev;
9a61bf63 158 struct mutex update_lock;
1da177e4
LT		 159 char valid; /* zero until following fields are valid */
160 unsigned long last_updated; /* in jiffies */
161
162 /* registers values */
163 u8 config, config_fan;
bc51ae11
JD		 164 u16 fan[2]; /* 0: input
165 1: low limit */
1da177e4
LT		 166 u8 pwm1_freq;
167 u8 pwm1_value;
bc51ae11
JD		 168 s8 temp8[3]; /* 0: local input
169 1: local high limit
170 2: remote critical limit */
171 s16 temp11[3]; /* 0: remote input
172 1: remote low limit
173 2: remote high limit */
1da177e4
LT		 174 u8 temp2_crit_hyst;
175 u8 alarms;
176};
177
178/*
179 * Sysfs callback functions and files
180 */
181
bc51ae11
JD		 182static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
183 char *buf)
184{
185 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
186 struct lm63_data *data = lm63_update_device(dev);
187 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index]));
1da177e4 188}
1da177e4 189
bc51ae11
JD		 190static ssize_t set_fan(struct device *dev, struct device_attribute *dummy,
191 const char *buf, size_t count)
1da177e4
LT		 192{
193 struct i2c_client *client = to_i2c_client(dev);
194 struct lm63_data *data = i2c_get_clientdata(client);
195 unsigned long val = simple_strtoul(buf, NULL, 10);
196
9a61bf63 197 mutex_lock(&data->update_lock);
bc51ae11 198 data->fan[1] = FAN_TO_REG(val);
1da177e4 199 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB,
bc51ae11 200 data->fan[1] & 0xFF);
1da177e4 201 i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB,
bc51ae11 202 data->fan[1] >> 8);
9a61bf63 203 mutex_unlock(&data->update_lock);
1da177e4
LT		 204 return count;
205}
206
bc51ae11
JD		 207static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy,
208 char *buf)
1da177e4
LT		 209{
210 struct lm63_data *data = lm63_update_device(dev);
211 return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ?
212 255 : (data->pwm1_value * 255 + data->pwm1_freq) /
213 (2 * data->pwm1_freq));
214}
215
bc51ae11
JD		 216static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy,
217 const char *buf, size_t count)
1da177e4
LT		 218{
219 struct i2c_client *client = to_i2c_client(dev);
220 struct lm63_data *data = i2c_get_clientdata(client);
221 unsigned long val;
222
223 if (!(data->config_fan & 0x20)) /* register is read-only */
224 return -EPERM;
225
226 val = simple_strtoul(buf, NULL, 10);
9a61bf63 227 mutex_lock(&data->update_lock);
1da177e4
LT		 228 data->pwm1_value = val <= 0 ? 0 :
229 val >= 255 ? 2 * data->pwm1_freq :
230 (val * data->pwm1_freq * 2 + 127) / 255;
231 i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value);
9a61bf63 232 mutex_unlock(&data->update_lock);
1da177e4
LT		 233 return count;
234}
235
bc51ae11
JD		 236static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy,
237 char *buf)
1da177e4
LT		 238{
239 struct lm63_data *data = lm63_update_device(dev);
240 return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2);
241}
242
bc51ae11
JD		 243static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
244 char *buf)
245{
246 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
247 struct lm63_data *data = lm63_update_device(dev);
248 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]));
1da177e4 249}
bc51ae11
JD		 250
251static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy,
252 const char *buf, size_t count)
253{
254 struct i2c_client *client = to_i2c_client(dev);
255 struct lm63_data *data = i2c_get_clientdata(client);
256 long val = simple_strtol(buf, NULL, 10);
257
9a61bf63 258 mutex_lock(&data->update_lock);
bc51ae11
JD		 259 data->temp8[1] = TEMP8_TO_REG(val);
260 i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]);
9a61bf63 261 mutex_unlock(&data->update_lock);
bc51ae11 262 return count;
1da177e4 263}
bc51ae11
JD		 264
265static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
266 char *buf)
267{
268 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
269 struct lm63_data *data = lm63_update_device(dev);
270 return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index]));
1da177e4 271}
bc51ae11
JD		 272
273static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
274 const char *buf, size_t count)
275{
276 static const u8 reg[4] = {
277 LM63_REG_REMOTE_LOW_MSB,
278 LM63_REG_REMOTE_LOW_LSB,
279 LM63_REG_REMOTE_HIGH_MSB,
280 LM63_REG_REMOTE_HIGH_LSB,
281 };
282
283 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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 int nr = attr->index;
288
9a61bf63 289 mutex_lock(&data->update_lock);
bc51ae11
JD		 290 data->temp11[nr] = TEMP11_TO_REG(val);
291 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2],
292 data->temp11[nr] >> 8);
293 i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1],
294 data->temp11[nr] & 0xff);
9a61bf63 295 mutex_unlock(&data->update_lock);
bc51ae11 296 return count;
1da177e4 297}
1da177e4
LT		 298
299/* Hysteresis register holds a relative value, while we want to present
300 an absolute to user-space */
bc51ae11
JD		 301static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
302 char *buf)
1da177e4
LT		 303{
304 struct lm63_data *data = lm63_update_device(dev);
bc51ae11 305 return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2])
1da177e4
LT		 306 - TEMP8_FROM_REG(data->temp2_crit_hyst));
307}
308
309/* And now the other way around, user-space provides an absolute
310 hysteresis value and we have to store a relative one */
bc51ae11
JD		 311static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy,
312 const char *buf, size_t count)
1da177e4
LT		 313{
314 struct i2c_client *client = to_i2c_client(dev);
315 struct lm63_data *data = i2c_get_clientdata(client);
316 long val = simple_strtol(buf, NULL, 10);
317 long hyst;
318
9a61bf63 319 mutex_lock(&data->update_lock);
bc51ae11 320 hyst = TEMP8_FROM_REG(data->temp8[2]) - val;
1da177e4
LT		 321 i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST,
322 HYST_TO_REG(hyst));
9a61bf63 323 mutex_unlock(&data->update_lock);
1da177e4
LT		 324 return count;
325}
326
bc51ae11
JD		 327static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
328 char *buf)
1da177e4
LT		 329{
330 struct lm63_data *data = lm63_update_device(dev);
331 return sprintf(buf, "%u\n", data->alarms);
332}
333
2d45771e
JD		 334static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr,
335 char *buf)
336{
337 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
338 struct lm63_data *data = lm63_update_device(dev);
339 int bitnr = attr->index;
340
341 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
342}
343
bc51ae11
JD		 344static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
345static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan,
346 set_fan, 1);
1da177e4
LT		 347
348static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1);
349static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL);
350
bc51ae11
JD		 351static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0);
352static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
353 set_temp8, 1);
1da177e4 354
bc51ae11
JD		 355static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0);
356static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
357 set_temp11, 1);
358static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
359 set_temp11, 2);
360static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2);
1da177e4
LT		 361static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst,
362 set_temp2_crit_hyst);
363
2d45771e
JD		 364/* Individual alarm files */
365static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0);
366static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
7817a39e 367static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
2d45771e
JD		 368static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
369static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
370static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
371/* Raw alarm file for compatibility */
1da177e4
LT		 372static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
373
0e39e01c
JD		 374static struct attribute *lm63_attributes[] = {
375 &dev_attr_pwm1.attr,
376 &dev_attr_pwm1_enable.attr,
377 &sensor_dev_attr_temp1_input.dev_attr.attr,
378 &sensor_dev_attr_temp2_input.dev_attr.attr,
379 &sensor_dev_attr_temp2_min.dev_attr.attr,
380 &sensor_dev_attr_temp1_max.dev_attr.attr,
381 &sensor_dev_attr_temp2_max.dev_attr.attr,
382 &sensor_dev_attr_temp2_crit.dev_attr.attr,
383 &dev_attr_temp2_crit_hyst.attr,
384
385 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
7817a39e 386 &sensor_dev_attr_temp2_fault.dev_attr.attr,
0e39e01c
JD		 387 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
388 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
389 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
390 &dev_attr_alarms.attr,
391 NULL
392};
393
394static const struct attribute_group lm63_group = {
395 .attrs = lm63_attributes,
396};
397
398static struct attribute *lm63_attributes_fan1[] = {
399 &sensor_dev_attr_fan1_input.dev_attr.attr,
400 &sensor_dev_attr_fan1_min.dev_attr.attr,
401
402 &sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
403 NULL
404};
405
406static const struct attribute_group lm63_group_fan1 = {
407 .attrs = lm63_attributes_fan1,
408};
409
1da177e4
LT		 410/*
411 * Real code
412 */
413
414static int lm63_attach_adapter(struct i2c_adapter *adapter)
415{
416 if (!(adapter->class & I2C_CLASS_HWMON))
417 return 0;
2ed2dc3c 418 return i2c_probe(adapter, &addr_data, lm63_detect);
1da177e4
LT		 419}
420
421/*
422 * The following function does more than just detection. If detection
423 * succeeds, it also registers the new chip.
424 */
425static int lm63_detect(struct i2c_adapter *adapter, int address, int kind)
426{
427 struct i2c_client *new_client;
428 struct lm63_data *data;
429 int err = 0;
430
431 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
432 goto exit;
433
ba9c2e8d 434 if (!(data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL))) {
1da177e4
LT		 435 err = -ENOMEM;
436 goto exit;
437 }
1da177e4
LT		 438
439 /* The common I2C client data is placed right before the
440 LM63-specific data. */
441 new_client = &data->client;
442 i2c_set_clientdata(new_client, data);
443 new_client->addr = address;
444 new_client->adapter = adapter;
445 new_client->driver = &lm63_driver;
446 new_client->flags = 0;
447
448 /* Default to an LM63 if forced */
449 if (kind == 0)
450 kind = lm63;
451
452 if (kind < 0) { /* must identify */
453 u8 man_id, chip_id, reg_config1, reg_config2;
454 u8 reg_alert_status, reg_alert_mask;
455
456 man_id = i2c_smbus_read_byte_data(new_client,
457 LM63_REG_MAN_ID);
458 chip_id = i2c_smbus_read_byte_data(new_client,
459 LM63_REG_CHIP_ID);
460 reg_config1 = i2c_smbus_read_byte_data(new_client,
461 LM63_REG_CONFIG1);
462 reg_config2 = i2c_smbus_read_byte_data(new_client,
463 LM63_REG_CONFIG2);
464 reg_alert_status = i2c_smbus_read_byte_data(new_client,
465 LM63_REG_ALERT_STATUS);
466 reg_alert_mask = i2c_smbus_read_byte_data(new_client,
467 LM63_REG_ALERT_MASK);
468
469 if (man_id == 0x01 /* National Semiconductor */
470 && chip_id == 0x41 /* LM63 */
471 && (reg_config1 & 0x18) == 0x00
472 && (reg_config2 & 0xF8) == 0x00
473 && (reg_alert_status & 0x20) == 0x00
474 && (reg_alert_mask & 0xA4) == 0xA4) {
475 kind = lm63;
476 } else { /* failed */
477 dev_dbg(&adapter->dev, "Unsupported chip "
478 "(man_id=0x%02X, chip_id=0x%02X).\n",
479 man_id, chip_id);
480 goto exit_free;
481 }
482 }
483
484 strlcpy(new_client->name, "lm63", I2C_NAME_SIZE);
485 data->valid = 0;
9a61bf63 486 mutex_init(&data->update_lock);
1da177e4
LT		 487
488 /* Tell the I2C layer a new client has arrived */
489 if ((err = i2c_attach_client(new_client)))
490 goto exit_free;
491
492 /* Initialize the LM63 chip */
493 lm63_init_client(new_client);
494
495 /* Register sysfs hooks */
0e39e01c
JD		 496 if ((err = sysfs_create_group(&new_client->dev.kobj,
497 &lm63_group)))
943b0830 498 goto exit_detach;
0e39e01c
JD		 499 if (data->config & 0x04) { /* tachometer enabled */
500 if ((err = sysfs_create_group(&new_client->dev.kobj,
501 &lm63_group_fan1)))
502 goto exit_remove_files;
943b0830
MH		 503 }
504
1beeffe4
TJ		 505 data->hwmon_dev = hwmon_device_register(&new_client->dev);
506 if (IS_ERR(data->hwmon_dev)) {
507 err = PTR_ERR(data->hwmon_dev);
0e39e01c 508 goto exit_remove_files;
1da177e4 509 }
1da177e4
LT		 510
511 return 0;
512
0e39e01c
JD		 513exit_remove_files:
514 sysfs_remove_group(&new_client->dev.kobj, &lm63_group);
515 sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1);
943b0830
MH		 516exit_detach:
517 i2c_detach_client(new_client);
1da177e4
LT		 518exit_free:
519 kfree(data);
520exit:
521 return err;
522}
523
524/* Idealy we shouldn't have to initialize anything, since the BIOS
525 should have taken care of everything */
526static void lm63_init_client(struct i2c_client *client)
527{
528 struct lm63_data *data = i2c_get_clientdata(client);
529
530 data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1);
531 data->config_fan = i2c_smbus_read_byte_data(client,
532 LM63_REG_CONFIG_FAN);
533
534 /* Start converting if needed */
535 if (data->config & 0x40) { /* standby */
898eb71c 536 dev_dbg(&client->dev, "Switching to operational mode\n");
1da177e4
LT		 537 data->config &= 0xA7;
538 i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1,
539 data->config);
540 }
541
542 /* We may need pwm1_freq before ever updating the client data */
543 data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ);
544 if (data->pwm1_freq == 0)
545 data->pwm1_freq = 1;
546
547 /* Show some debug info about the LM63 configuration */
548 dev_dbg(&client->dev, "Alert/tach pin configured for %s\n",
549 (data->config & 0x04) ? "tachometer input" :
550 "alert output");
551 dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n",
552 (data->config_fan & 0x08) ? "1.4" : "360",
553 ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq);
554 dev_dbg(&client->dev, "PWM output active %s, %s mode\n",
555 (data->config_fan & 0x10) ? "low" : "high",
556 (data->config_fan & 0x20) ? "manual" : "auto");
557}
558
559static int lm63_detach_client(struct i2c_client *client)
560{
943b0830 561 struct lm63_data *data = i2c_get_clientdata(client);
1da177e4
LT		 562 int err;
563
1beeffe4 564 hwmon_device_unregister(data->hwmon_dev);
0e39e01c
JD		 565 sysfs_remove_group(&client->dev.kobj, &lm63_group);
566 sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1);
943b0830 567
7bef5594 568 if ((err = i2c_detach_client(client)))
1da177e4 569 return err;
1da177e4 570
943b0830 571 kfree(data);
1da177e4
LT		 572 return 0;
573}
574
575static struct lm63_data *lm63_update_device(struct device *dev)
576{
577 struct i2c_client *client = to_i2c_client(dev);
578 struct lm63_data *data = i2c_get_clientdata(client);
579
9a61bf63 580 mutex_lock(&data->update_lock);
1da177e4
LT		 581
582 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
583 if (data->config & 0x04) { /* tachometer enabled */
584 /* order matters for fan1_input */
bc51ae11
JD		 585 data->fan[0] = i2c_smbus_read_byte_data(client,
586 LM63_REG_TACH_COUNT_LSB) & 0xFC;
587 data->fan[0] |= i2c_smbus_read_byte_data(client,
588 LM63_REG_TACH_COUNT_MSB) << 8;
589 data->fan[1] = (i2c_smbus_read_byte_data(client,
590 LM63_REG_TACH_LIMIT_LSB) & 0xFC)
591 | (i2c_smbus_read_byte_data(client,
592 LM63_REG_TACH_LIMIT_MSB) << 8);
1da177e4
LT		 593 }
594
595 data->pwm1_freq = i2c_smbus_read_byte_data(client,
596 LM63_REG_PWM_FREQ);
597 if (data->pwm1_freq == 0)
598 data->pwm1_freq = 1;
599 data->pwm1_value = i2c_smbus_read_byte_data(client,
600 LM63_REG_PWM_VALUE);
601
bc51ae11
JD		 602 data->temp8[0] = i2c_smbus_read_byte_data(client,
603 LM63_REG_LOCAL_TEMP);
604 data->temp8[1] = i2c_smbus_read_byte_data(client,
605 LM63_REG_LOCAL_HIGH);
1da177e4
LT		 606
607 /* order matters for temp2_input */
bc51ae11
JD		 608 data->temp11[0] = i2c_smbus_read_byte_data(client,
609 LM63_REG_REMOTE_TEMP_MSB) << 8;
610 data->temp11[0] |= i2c_smbus_read_byte_data(client,
611 LM63_REG_REMOTE_TEMP_LSB);
612 data->temp11[1] = (i2c_smbus_read_byte_data(client,
1da177e4
LT		 613 LM63_REG_REMOTE_LOW_MSB) << 8)
614 | i2c_smbus_read_byte_data(client,
615 LM63_REG_REMOTE_LOW_LSB);
bc51ae11
JD		 616 data->temp11[2] = (i2c_smbus_read_byte_data(client,
617 LM63_REG_REMOTE_HIGH_MSB) << 8)
618 | i2c_smbus_read_byte_data(client,
619 LM63_REG_REMOTE_HIGH_LSB);
620 data->temp8[2] = i2c_smbus_read_byte_data(client,
621 LM63_REG_REMOTE_TCRIT);
1da177e4
LT		 622 data->temp2_crit_hyst = i2c_smbus_read_byte_data(client,
623 LM63_REG_REMOTE_TCRIT_HYST);
624
625 data->alarms = i2c_smbus_read_byte_data(client,
626 LM63_REG_ALERT_STATUS) & 0x7F;
627
628 data->last_updated = jiffies;
629 data->valid = 1;
630 }
631
9a61bf63 632 mutex_unlock(&data->update_lock);
1da177e4
LT		 633
634 return data;
635}
636
637static int __init sensors_lm63_init(void)
638{
639 return i2c_add_driver(&lm63_driver);
640}
641
642static void __exit sensors_lm63_exit(void)
643{
644 i2c_del_driver(&lm63_driver);
645}
646
647MODULE_AUTHOR("Jean Delvare <[email protected]>");
648MODULE_DESCRIPTION("LM63 driver");
649MODULE_LICENSE("GPL");
650
651module_init(sensors_lm63_init);
652module_exit(sensors_lm63_exit);
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