Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * lm63.c - driver for the National Semiconductor LM63 temperature sensor | |
3 | * with integrated fan control | |
d5957be2 | 4 | * Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.org> |
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 | 56 | static const unsigned short normal_i2c[] = { 0x4c, I2C_CLIENT_END }; |
1da177e4 | 57 | |
1da177e4 LT |
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 | |
44bbe87e | 98 | * value, it uses signed 8-bit values with LSB = 1 degree Celsius. |
1da177e4 | 99 | * For remote temperature, low and high limits, it uses signed 11-bit values |
44bbe87e | 100 | * with LSB = 0.125 degree Celsius, left-justified in 16-bit registers. |
1da177e4 LT |
101 | */ |
102 | ||
103 | #define FAN_FROM_REG(reg) ((reg) == 0xFFFC || (reg) == 0 ? 0 : \ | |
104 | 5400000 / (reg)) | |
105 | #define FAN_TO_REG(val) ((val) <= 82 ? 0xFFFC : \ | |
106 | (5400000 / (val)) & 0xFFFC) | |
107 | #define TEMP8_FROM_REG(reg) ((reg) * 1000) | |
108 | #define TEMP8_TO_REG(val) ((val) <= -128000 ? -128 : \ | |
109 | (val) >= 127000 ? 127 : \ | |
110 | (val) < 0 ? ((val) - 500) / 1000 : \ | |
111 | ((val) + 500) / 1000) | |
112 | #define TEMP11_FROM_REG(reg) ((reg) / 32 * 125) | |
113 | #define TEMP11_TO_REG(val) ((val) <= -128000 ? 0x8000 : \ | |
114 | (val) >= 127875 ? 0x7FE0 : \ | |
115 | (val) < 0 ? ((val) - 62) / 125 * 32 : \ | |
116 | ((val) + 62) / 125 * 32) | |
117 | #define HYST_TO_REG(val) ((val) <= 0 ? 0 : \ | |
118 | (val) >= 127000 ? 127 : \ | |
119 | ((val) + 500) / 1000) | |
120 | ||
121 | /* | |
122 | * Functions declaration | |
123 | */ | |
124 | ||
d5957be2 JD |
125 | static int lm63_probe(struct i2c_client *client, |
126 | const struct i2c_device_id *id); | |
127 | static int lm63_remove(struct i2c_client *client); | |
1da177e4 LT |
128 | |
129 | static struct lm63_data *lm63_update_device(struct device *dev); | |
130 | ||
310ec792 | 131 | static int lm63_detect(struct i2c_client *client, struct i2c_board_info *info); |
1da177e4 LT |
132 | static void lm63_init_client(struct i2c_client *client); |
133 | ||
134 | /* | |
135 | * Driver data (common to all clients) | |
136 | */ | |
137 | ||
d5957be2 | 138 | static const struct i2c_device_id lm63_id[] = { |
1f86df49 | 139 | { "lm63", 0 }, |
d5957be2 JD |
140 | { } |
141 | }; | |
142 | MODULE_DEVICE_TABLE(i2c, lm63_id); | |
143 | ||
1da177e4 | 144 | static struct i2c_driver lm63_driver = { |
d5957be2 | 145 | .class = I2C_CLASS_HWMON, |
cdaf7934 | 146 | .driver = { |
cdaf7934 LR |
147 | .name = "lm63", |
148 | }, | |
d5957be2 JD |
149 | .probe = lm63_probe, |
150 | .remove = lm63_remove, | |
151 | .id_table = lm63_id, | |
152 | .detect = lm63_detect, | |
c3813d6a | 153 | .address_list = normal_i2c, |
1da177e4 LT |
154 | }; |
155 | ||
156 | /* | |
157 | * Client data (each client gets its own) | |
158 | */ | |
159 | ||
160 | struct lm63_data { | |
1beeffe4 | 161 | struct device *hwmon_dev; |
9a61bf63 | 162 | struct mutex update_lock; |
1da177e4 LT |
163 | char valid; /* zero until following fields are valid */ |
164 | unsigned long last_updated; /* in jiffies */ | |
165 | ||
166 | /* registers values */ | |
167 | u8 config, config_fan; | |
bc51ae11 JD |
168 | u16 fan[2]; /* 0: input |
169 | 1: low limit */ | |
1da177e4 LT |
170 | u8 pwm1_freq; |
171 | u8 pwm1_value; | |
bc51ae11 JD |
172 | s8 temp8[3]; /* 0: local input |
173 | 1: local high limit | |
174 | 2: remote critical limit */ | |
175 | s16 temp11[3]; /* 0: remote input | |
176 | 1: remote low limit | |
177 | 2: remote high limit */ | |
1da177e4 LT |
178 | u8 temp2_crit_hyst; |
179 | u8 alarms; | |
180 | }; | |
181 | ||
182 | /* | |
183 | * Sysfs callback functions and files | |
184 | */ | |
185 | ||
bc51ae11 JD |
186 | static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, |
187 | char *buf) | |
188 | { | |
189 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
190 | struct lm63_data *data = lm63_update_device(dev); | |
191 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index])); | |
1da177e4 | 192 | } |
1da177e4 | 193 | |
bc51ae11 JD |
194 | static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, |
195 | const char *buf, size_t count) | |
1da177e4 LT |
196 | { |
197 | struct i2c_client *client = to_i2c_client(dev); | |
198 | struct lm63_data *data = i2c_get_clientdata(client); | |
199 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
200 | ||
9a61bf63 | 201 | mutex_lock(&data->update_lock); |
bc51ae11 | 202 | data->fan[1] = FAN_TO_REG(val); |
1da177e4 | 203 | i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, |
bc51ae11 | 204 | data->fan[1] & 0xFF); |
1da177e4 | 205 | i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, |
bc51ae11 | 206 | data->fan[1] >> 8); |
9a61bf63 | 207 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
208 | return count; |
209 | } | |
210 | ||
bc51ae11 JD |
211 | static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy, |
212 | char *buf) | |
1da177e4 LT |
213 | { |
214 | struct lm63_data *data = lm63_update_device(dev); | |
215 | return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ? | |
216 | 255 : (data->pwm1_value * 255 + data->pwm1_freq) / | |
217 | (2 * data->pwm1_freq)); | |
218 | } | |
219 | ||
bc51ae11 JD |
220 | static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy, |
221 | const char *buf, size_t count) | |
1da177e4 LT |
222 | { |
223 | struct i2c_client *client = to_i2c_client(dev); | |
224 | struct lm63_data *data = i2c_get_clientdata(client); | |
225 | unsigned long val; | |
226 | ||
227 | if (!(data->config_fan & 0x20)) /* register is read-only */ | |
228 | return -EPERM; | |
229 | ||
230 | val = simple_strtoul(buf, NULL, 10); | |
9a61bf63 | 231 | mutex_lock(&data->update_lock); |
1da177e4 LT |
232 | data->pwm1_value = val <= 0 ? 0 : |
233 | val >= 255 ? 2 * data->pwm1_freq : | |
234 | (val * data->pwm1_freq * 2 + 127) / 255; | |
235 | i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value); | |
9a61bf63 | 236 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
237 | return count; |
238 | } | |
239 | ||
bc51ae11 JD |
240 | static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy, |
241 | char *buf) | |
1da177e4 LT |
242 | { |
243 | struct lm63_data *data = lm63_update_device(dev); | |
244 | return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); | |
245 | } | |
246 | ||
bc51ae11 JD |
247 | static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr, |
248 | char *buf) | |
249 | { | |
250 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
251 | struct lm63_data *data = lm63_update_device(dev); | |
252 | return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])); | |
1da177e4 | 253 | } |
bc51ae11 JD |
254 | |
255 | static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy, | |
256 | const char *buf, size_t count) | |
257 | { | |
258 | struct i2c_client *client = to_i2c_client(dev); | |
259 | struct lm63_data *data = i2c_get_clientdata(client); | |
260 | long val = simple_strtol(buf, NULL, 10); | |
261 | ||
9a61bf63 | 262 | mutex_lock(&data->update_lock); |
bc51ae11 JD |
263 | data->temp8[1] = TEMP8_TO_REG(val); |
264 | i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]); | |
9a61bf63 | 265 | mutex_unlock(&data->update_lock); |
bc51ae11 | 266 | return count; |
1da177e4 | 267 | } |
bc51ae11 JD |
268 | |
269 | static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, | |
270 | char *buf) | |
271 | { | |
272 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
273 | struct lm63_data *data = lm63_update_device(dev); | |
274 | return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index])); | |
1da177e4 | 275 | } |
bc51ae11 JD |
276 | |
277 | static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, | |
278 | const char *buf, size_t count) | |
279 | { | |
280 | static const u8 reg[4] = { | |
281 | LM63_REG_REMOTE_LOW_MSB, | |
282 | LM63_REG_REMOTE_LOW_LSB, | |
283 | LM63_REG_REMOTE_HIGH_MSB, | |
284 | LM63_REG_REMOTE_HIGH_LSB, | |
285 | }; | |
286 | ||
287 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
288 | struct i2c_client *client = to_i2c_client(dev); | |
289 | struct lm63_data *data = i2c_get_clientdata(client); | |
290 | long val = simple_strtol(buf, NULL, 10); | |
291 | int nr = attr->index; | |
292 | ||
9a61bf63 | 293 | mutex_lock(&data->update_lock); |
bc51ae11 JD |
294 | data->temp11[nr] = TEMP11_TO_REG(val); |
295 | i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], | |
296 | data->temp11[nr] >> 8); | |
297 | i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], | |
298 | data->temp11[nr] & 0xff); | |
9a61bf63 | 299 | mutex_unlock(&data->update_lock); |
bc51ae11 | 300 | return count; |
1da177e4 | 301 | } |
1da177e4 LT |
302 | |
303 | /* Hysteresis register holds a relative value, while we want to present | |
304 | an absolute to user-space */ | |
bc51ae11 JD |
305 | static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy, |
306 | char *buf) | |
1da177e4 LT |
307 | { |
308 | struct lm63_data *data = lm63_update_device(dev); | |
bc51ae11 | 309 | return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2]) |
1da177e4 LT |
310 | - TEMP8_FROM_REG(data->temp2_crit_hyst)); |
311 | } | |
312 | ||
313 | /* And now the other way around, user-space provides an absolute | |
314 | hysteresis value and we have to store a relative one */ | |
bc51ae11 JD |
315 | static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy, |
316 | const char *buf, size_t count) | |
1da177e4 LT |
317 | { |
318 | struct i2c_client *client = to_i2c_client(dev); | |
319 | struct lm63_data *data = i2c_get_clientdata(client); | |
320 | long val = simple_strtol(buf, NULL, 10); | |
321 | long hyst; | |
322 | ||
9a61bf63 | 323 | mutex_lock(&data->update_lock); |
bc51ae11 | 324 | hyst = TEMP8_FROM_REG(data->temp8[2]) - val; |
1da177e4 LT |
325 | i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, |
326 | HYST_TO_REG(hyst)); | |
9a61bf63 | 327 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
328 | return count; |
329 | } | |
330 | ||
bc51ae11 JD |
331 | static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, |
332 | char *buf) | |
1da177e4 LT |
333 | { |
334 | struct lm63_data *data = lm63_update_device(dev); | |
335 | return sprintf(buf, "%u\n", data->alarms); | |
336 | } | |
337 | ||
2d45771e JD |
338 | static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr, |
339 | char *buf) | |
340 | { | |
341 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
342 | struct lm63_data *data = lm63_update_device(dev); | |
343 | int bitnr = attr->index; | |
344 | ||
345 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
346 | } | |
347 | ||
bc51ae11 JD |
348 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); |
349 | static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, | |
350 | set_fan, 1); | |
1da177e4 LT |
351 | |
352 | static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1); | |
353 | static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL); | |
354 | ||
bc51ae11 JD |
355 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0); |
356 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8, | |
357 | set_temp8, 1); | |
1da177e4 | 358 | |
bc51ae11 JD |
359 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); |
360 | static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, | |
361 | set_temp11, 1); | |
362 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, | |
363 | set_temp11, 2); | |
364 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2); | |
1da177e4 LT |
365 | static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst, |
366 | set_temp2_crit_hyst); | |
367 | ||
2d45771e JD |
368 | /* Individual alarm files */ |
369 | static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0); | |
370 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); | |
7817a39e | 371 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); |
2d45771e JD |
372 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); |
373 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); | |
374 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); | |
375 | /* Raw alarm file for compatibility */ | |
1da177e4 LT |
376 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
377 | ||
0e39e01c JD |
378 | static struct attribute *lm63_attributes[] = { |
379 | &dev_attr_pwm1.attr, | |
380 | &dev_attr_pwm1_enable.attr, | |
381 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
382 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
383 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
384 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
385 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
386 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
387 | &dev_attr_temp2_crit_hyst.attr, | |
388 | ||
389 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
7817a39e | 390 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
0e39e01c JD |
391 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
392 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
393 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
394 | &dev_attr_alarms.attr, | |
395 | NULL | |
396 | }; | |
397 | ||
398 | static const struct attribute_group lm63_group = { | |
399 | .attrs = lm63_attributes, | |
400 | }; | |
401 | ||
402 | static struct attribute *lm63_attributes_fan1[] = { | |
403 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
404 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
405 | ||
406 | &sensor_dev_attr_fan1_min_alarm.dev_attr.attr, | |
407 | NULL | |
408 | }; | |
409 | ||
410 | static const struct attribute_group lm63_group_fan1 = { | |
411 | .attrs = lm63_attributes_fan1, | |
412 | }; | |
413 | ||
1da177e4 LT |
414 | /* |
415 | * Real code | |
416 | */ | |
417 | ||
d5957be2 | 418 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 419 | static int lm63_detect(struct i2c_client *new_client, |
d5957be2 | 420 | struct i2c_board_info *info) |
1da177e4 | 421 | { |
d5957be2 | 422 | struct i2c_adapter *adapter = new_client->adapter; |
52df6440 JD |
423 | u8 man_id, chip_id, reg_config1, reg_config2; |
424 | u8 reg_alert_status, reg_alert_mask; | |
1da177e4 LT |
425 | |
426 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
d5957be2 | 427 | return -ENODEV; |
1da177e4 | 428 | |
52df6440 JD |
429 | man_id = i2c_smbus_read_byte_data(new_client, LM63_REG_MAN_ID); |
430 | chip_id = i2c_smbus_read_byte_data(new_client, LM63_REG_CHIP_ID); | |
431 | ||
432 | reg_config1 = i2c_smbus_read_byte_data(new_client, | |
433 | LM63_REG_CONFIG1); | |
434 | reg_config2 = i2c_smbus_read_byte_data(new_client, | |
435 | LM63_REG_CONFIG2); | |
436 | reg_alert_status = i2c_smbus_read_byte_data(new_client, | |
437 | LM63_REG_ALERT_STATUS); | |
438 | reg_alert_mask = i2c_smbus_read_byte_data(new_client, | |
439 | LM63_REG_ALERT_MASK); | |
440 | ||
441 | if (man_id != 0x01 /* National Semiconductor */ | |
442 | || chip_id != 0x41 /* LM63 */ | |
443 | || (reg_config1 & 0x18) != 0x00 | |
444 | || (reg_config2 & 0xF8) != 0x00 | |
445 | || (reg_alert_status & 0x20) != 0x00 | |
446 | || (reg_alert_mask & 0xA4) != 0xA4) { | |
447 | dev_dbg(&adapter->dev, | |
448 | "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n", | |
449 | man_id, chip_id); | |
450 | return -ENODEV; | |
1da177e4 LT |
451 | } |
452 | ||
d5957be2 JD |
453 | strlcpy(info->type, "lm63", I2C_NAME_SIZE); |
454 | ||
455 | return 0; | |
456 | } | |
457 | ||
458 | static int lm63_probe(struct i2c_client *new_client, | |
459 | const struct i2c_device_id *id) | |
460 | { | |
461 | struct lm63_data *data; | |
462 | int err; | |
463 | ||
464 | data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL); | |
465 | if (!data) { | |
466 | err = -ENOMEM; | |
467 | goto exit; | |
468 | } | |
469 | ||
470 | i2c_set_clientdata(new_client, data); | |
1da177e4 | 471 | data->valid = 0; |
9a61bf63 | 472 | mutex_init(&data->update_lock); |
1da177e4 | 473 | |
1da177e4 LT |
474 | /* Initialize the LM63 chip */ |
475 | lm63_init_client(new_client); | |
476 | ||
477 | /* Register sysfs hooks */ | |
0e39e01c JD |
478 | if ((err = sysfs_create_group(&new_client->dev.kobj, |
479 | &lm63_group))) | |
d5957be2 | 480 | goto exit_free; |
0e39e01c JD |
481 | if (data->config & 0x04) { /* tachometer enabled */ |
482 | if ((err = sysfs_create_group(&new_client->dev.kobj, | |
483 | &lm63_group_fan1))) | |
484 | goto exit_remove_files; | |
943b0830 MH |
485 | } |
486 | ||
1beeffe4 TJ |
487 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
488 | if (IS_ERR(data->hwmon_dev)) { | |
489 | err = PTR_ERR(data->hwmon_dev); | |
0e39e01c | 490 | goto exit_remove_files; |
1da177e4 | 491 | } |
1da177e4 LT |
492 | |
493 | return 0; | |
494 | ||
0e39e01c JD |
495 | exit_remove_files: |
496 | sysfs_remove_group(&new_client->dev.kobj, &lm63_group); | |
497 | sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1); | |
1da177e4 LT |
498 | exit_free: |
499 | kfree(data); | |
500 | exit: | |
501 | return err; | |
502 | } | |
503 | ||
504 | /* Idealy we shouldn't have to initialize anything, since the BIOS | |
505 | should have taken care of everything */ | |
506 | static void lm63_init_client(struct i2c_client *client) | |
507 | { | |
508 | struct lm63_data *data = i2c_get_clientdata(client); | |
509 | ||
510 | data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); | |
511 | data->config_fan = i2c_smbus_read_byte_data(client, | |
512 | LM63_REG_CONFIG_FAN); | |
513 | ||
514 | /* Start converting if needed */ | |
515 | if (data->config & 0x40) { /* standby */ | |
898eb71c | 516 | dev_dbg(&client->dev, "Switching to operational mode\n"); |
1da177e4 LT |
517 | data->config &= 0xA7; |
518 | i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, | |
519 | data->config); | |
520 | } | |
521 | ||
522 | /* We may need pwm1_freq before ever updating the client data */ | |
523 | data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); | |
524 | if (data->pwm1_freq == 0) | |
525 | data->pwm1_freq = 1; | |
526 | ||
527 | /* Show some debug info about the LM63 configuration */ | |
528 | dev_dbg(&client->dev, "Alert/tach pin configured for %s\n", | |
529 | (data->config & 0x04) ? "tachometer input" : | |
530 | "alert output"); | |
531 | dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n", | |
532 | (data->config_fan & 0x08) ? "1.4" : "360", | |
533 | ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); | |
534 | dev_dbg(&client->dev, "PWM output active %s, %s mode\n", | |
535 | (data->config_fan & 0x10) ? "low" : "high", | |
536 | (data->config_fan & 0x20) ? "manual" : "auto"); | |
537 | } | |
538 | ||
d5957be2 | 539 | static int lm63_remove(struct i2c_client *client) |
1da177e4 | 540 | { |
943b0830 | 541 | struct lm63_data *data = i2c_get_clientdata(client); |
1da177e4 | 542 | |
1beeffe4 | 543 | hwmon_device_unregister(data->hwmon_dev); |
0e39e01c JD |
544 | sysfs_remove_group(&client->dev.kobj, &lm63_group); |
545 | sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1); | |
943b0830 | 546 | |
943b0830 | 547 | kfree(data); |
1da177e4 LT |
548 | return 0; |
549 | } | |
550 | ||
551 | static struct lm63_data *lm63_update_device(struct device *dev) | |
552 | { | |
553 | struct i2c_client *client = to_i2c_client(dev); | |
554 | struct lm63_data *data = i2c_get_clientdata(client); | |
555 | ||
9a61bf63 | 556 | mutex_lock(&data->update_lock); |
1da177e4 LT |
557 | |
558 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
559 | if (data->config & 0x04) { /* tachometer enabled */ | |
560 | /* order matters for fan1_input */ | |
bc51ae11 JD |
561 | data->fan[0] = i2c_smbus_read_byte_data(client, |
562 | LM63_REG_TACH_COUNT_LSB) & 0xFC; | |
563 | data->fan[0] |= i2c_smbus_read_byte_data(client, | |
564 | LM63_REG_TACH_COUNT_MSB) << 8; | |
565 | data->fan[1] = (i2c_smbus_read_byte_data(client, | |
566 | LM63_REG_TACH_LIMIT_LSB) & 0xFC) | |
567 | | (i2c_smbus_read_byte_data(client, | |
568 | LM63_REG_TACH_LIMIT_MSB) << 8); | |
1da177e4 LT |
569 | } |
570 | ||
571 | data->pwm1_freq = i2c_smbus_read_byte_data(client, | |
572 | LM63_REG_PWM_FREQ); | |
573 | if (data->pwm1_freq == 0) | |
574 | data->pwm1_freq = 1; | |
575 | data->pwm1_value = i2c_smbus_read_byte_data(client, | |
576 | LM63_REG_PWM_VALUE); | |
577 | ||
bc51ae11 JD |
578 | data->temp8[0] = i2c_smbus_read_byte_data(client, |
579 | LM63_REG_LOCAL_TEMP); | |
580 | data->temp8[1] = i2c_smbus_read_byte_data(client, | |
581 | LM63_REG_LOCAL_HIGH); | |
1da177e4 LT |
582 | |
583 | /* order matters for temp2_input */ | |
bc51ae11 JD |
584 | data->temp11[0] = i2c_smbus_read_byte_data(client, |
585 | LM63_REG_REMOTE_TEMP_MSB) << 8; | |
586 | data->temp11[0] |= i2c_smbus_read_byte_data(client, | |
587 | LM63_REG_REMOTE_TEMP_LSB); | |
588 | data->temp11[1] = (i2c_smbus_read_byte_data(client, | |
1da177e4 LT |
589 | LM63_REG_REMOTE_LOW_MSB) << 8) |
590 | | i2c_smbus_read_byte_data(client, | |
591 | LM63_REG_REMOTE_LOW_LSB); | |
bc51ae11 JD |
592 | data->temp11[2] = (i2c_smbus_read_byte_data(client, |
593 | LM63_REG_REMOTE_HIGH_MSB) << 8) | |
594 | | i2c_smbus_read_byte_data(client, | |
595 | LM63_REG_REMOTE_HIGH_LSB); | |
596 | data->temp8[2] = i2c_smbus_read_byte_data(client, | |
597 | LM63_REG_REMOTE_TCRIT); | |
1da177e4 LT |
598 | data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, |
599 | LM63_REG_REMOTE_TCRIT_HYST); | |
600 | ||
601 | data->alarms = i2c_smbus_read_byte_data(client, | |
602 | LM63_REG_ALERT_STATUS) & 0x7F; | |
603 | ||
604 | data->last_updated = jiffies; | |
605 | data->valid = 1; | |
606 | } | |
607 | ||
9a61bf63 | 608 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
609 | |
610 | return data; | |
611 | } | |
612 | ||
613 | static int __init sensors_lm63_init(void) | |
614 | { | |
615 | return i2c_add_driver(&lm63_driver); | |
616 | } | |
617 | ||
618 | static void __exit sensors_lm63_exit(void) | |
619 | { | |
620 | i2c_del_driver(&lm63_driver); | |
621 | } | |
622 | ||
623 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); | |
624 | MODULE_DESCRIPTION("LM63 driver"); | |
625 | MODULE_LICENSE("GPL"); | |
626 | ||
627 | module_init(sensors_lm63_init); | |
628 | module_exit(sensors_lm63_exit); |