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 | ||
10f2ed31 | 56 | static const unsigned short normal_i2c[] = { 0x18, 0x4c, 0x4e, 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. |
2778fb13 DE |
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. | |
1da177e4 LT |
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 | ||
d5957be2 JD |
128 | static int lm63_probe(struct i2c_client *client, |
129 | const struct i2c_device_id *id); | |
130 | static int lm63_remove(struct i2c_client *client); | |
1da177e4 LT |
131 | |
132 | static struct lm63_data *lm63_update_device(struct device *dev); | |
133 | ||
310ec792 | 134 | static int lm63_detect(struct i2c_client *client, struct i2c_board_info *info); |
1da177e4 LT |
135 | static void lm63_init_client(struct i2c_client *client); |
136 | ||
10f2ed31 MG |
137 | enum chips { lm63, lm64 }; |
138 | ||
1da177e4 LT |
139 | /* |
140 | * Driver data (common to all clients) | |
141 | */ | |
142 | ||
d5957be2 | 143 | static const struct i2c_device_id lm63_id[] = { |
10f2ed31 MG |
144 | { "lm63", lm63 }, |
145 | { "lm64", lm64 }, | |
d5957be2 JD |
146 | { } |
147 | }; | |
148 | MODULE_DEVICE_TABLE(i2c, lm63_id); | |
149 | ||
1da177e4 | 150 | static struct i2c_driver lm63_driver = { |
d5957be2 | 151 | .class = I2C_CLASS_HWMON, |
cdaf7934 | 152 | .driver = { |
cdaf7934 LR |
153 | .name = "lm63", |
154 | }, | |
d5957be2 JD |
155 | .probe = lm63_probe, |
156 | .remove = lm63_remove, | |
157 | .id_table = lm63_id, | |
158 | .detect = lm63_detect, | |
c3813d6a | 159 | .address_list = normal_i2c, |
1da177e4 LT |
160 | }; |
161 | ||
162 | /* | |
163 | * Client data (each client gets its own) | |
164 | */ | |
165 | ||
166 | struct lm63_data { | |
1beeffe4 | 167 | struct device *hwmon_dev; |
9a61bf63 | 168 | struct mutex update_lock; |
1da177e4 LT |
169 | char valid; /* zero until following fields are valid */ |
170 | unsigned long last_updated; /* in jiffies */ | |
2778fb13 DE |
171 | int kind; |
172 | int temp2_offset; | |
1da177e4 LT |
173 | |
174 | /* registers values */ | |
175 | u8 config, config_fan; | |
bc51ae11 JD |
176 | u16 fan[2]; /* 0: input |
177 | 1: low limit */ | |
1da177e4 LT |
178 | u8 pwm1_freq; |
179 | u8 pwm1_value; | |
bc51ae11 JD |
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 */ | |
1da177e4 LT |
186 | u8 temp2_crit_hyst; |
187 | u8 alarms; | |
188 | }; | |
189 | ||
190 | /* | |
191 | * Sysfs callback functions and files | |
192 | */ | |
193 | ||
bc51ae11 JD |
194 | static 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])); | |
1da177e4 | 200 | } |
1da177e4 | 201 | |
bc51ae11 JD |
202 | static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, |
203 | const char *buf, size_t count) | |
1da177e4 LT |
204 | { |
205 | struct i2c_client *client = to_i2c_client(dev); | |
206 | struct lm63_data *data = i2c_get_clientdata(client); | |
662bda28 GR |
207 | unsigned long val; |
208 | int err; | |
209 | ||
210 | err = kstrtoul(buf, 10, &val); | |
211 | if (err) | |
212 | return err; | |
1da177e4 | 213 | |
9a61bf63 | 214 | mutex_lock(&data->update_lock); |
bc51ae11 | 215 | data->fan[1] = FAN_TO_REG(val); |
1da177e4 | 216 | i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, |
bc51ae11 | 217 | data->fan[1] & 0xFF); |
1da177e4 | 218 | i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, |
bc51ae11 | 219 | data->fan[1] >> 8); |
9a61bf63 | 220 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
221 | return count; |
222 | } | |
223 | ||
bc51ae11 JD |
224 | static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy, |
225 | char *buf) | |
1da177e4 LT |
226 | { |
227 | struct lm63_data *data = lm63_update_device(dev); | |
228 | return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ? | |
229 | 255 : (data->pwm1_value * 255 + data->pwm1_freq) / | |
230 | (2 * data->pwm1_freq)); | |
231 | } | |
232 | ||
bc51ae11 JD |
233 | static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy, |
234 | const char *buf, size_t count) | |
1da177e4 LT |
235 | { |
236 | struct i2c_client *client = to_i2c_client(dev); | |
237 | struct lm63_data *data = i2c_get_clientdata(client); | |
238 | unsigned long val; | |
662bda28 GR |
239 | int err; |
240 | ||
1da177e4 LT |
241 | if (!(data->config_fan & 0x20)) /* register is read-only */ |
242 | return -EPERM; | |
243 | ||
662bda28 GR |
244 | err = kstrtoul(buf, 10, &val); |
245 | if (err) | |
246 | return err; | |
247 | ||
9a61bf63 | 248 | mutex_lock(&data->update_lock); |
1da177e4 LT |
249 | data->pwm1_value = val <= 0 ? 0 : |
250 | val >= 255 ? 2 * data->pwm1_freq : | |
251 | (val * data->pwm1_freq * 2 + 127) / 255; | |
252 | i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value); | |
9a61bf63 | 253 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
254 | return count; |
255 | } | |
256 | ||
662bda28 GR |
257 | static ssize_t show_pwm1_enable(struct device *dev, |
258 | struct device_attribute *dummy, char *buf) | |
1da177e4 LT |
259 | { |
260 | struct lm63_data *data = lm63_update_device(dev); | |
261 | return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); | |
262 | } | |
263 | ||
2778fb13 DE |
264 | /* |
265 | * There are 8bit registers for both local(temp1) and remote(temp2) sensor. | |
266 | * For remote sensor registers temp2_offset has to be considered, | |
267 | * for local sensor it must not. | |
268 | * So we need separate 8bit accessors for local and remote sensor. | |
269 | */ | |
270 | static ssize_t show_local_temp8(struct device *dev, | |
271 | struct device_attribute *devattr, | |
272 | char *buf) | |
bc51ae11 JD |
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])); | |
1da177e4 | 277 | } |
bc51ae11 | 278 | |
2778fb13 DE |
279 | static ssize_t show_remote_temp8(struct device *dev, |
280 | struct device_attribute *devattr, | |
281 | char *buf) | |
282 | { | |
283 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
284 | struct lm63_data *data = lm63_update_device(dev); | |
285 | return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index]) | |
286 | + data->temp2_offset); | |
287 | } | |
288 | ||
289 | static ssize_t set_local_temp8(struct device *dev, | |
290 | struct device_attribute *dummy, | |
291 | const char *buf, size_t count) | |
bc51ae11 JD |
292 | { |
293 | struct i2c_client *client = to_i2c_client(dev); | |
294 | struct lm63_data *data = i2c_get_clientdata(client); | |
662bda28 GR |
295 | long val; |
296 | int err; | |
297 | ||
298 | err = kstrtol(buf, 10, &val); | |
299 | if (err) | |
300 | return err; | |
bc51ae11 | 301 | |
9a61bf63 | 302 | mutex_lock(&data->update_lock); |
bc51ae11 JD |
303 | data->temp8[1] = TEMP8_TO_REG(val); |
304 | i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]); | |
9a61bf63 | 305 | mutex_unlock(&data->update_lock); |
bc51ae11 | 306 | return count; |
1da177e4 | 307 | } |
bc51ae11 JD |
308 | |
309 | static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, | |
310 | char *buf) | |
311 | { | |
312 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
313 | struct lm63_data *data = lm63_update_device(dev); | |
2778fb13 DE |
314 | return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index]) |
315 | + data->temp2_offset); | |
1da177e4 | 316 | } |
bc51ae11 JD |
317 | |
318 | static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, | |
319 | const char *buf, size_t count) | |
320 | { | |
321 | static const u8 reg[4] = { | |
322 | LM63_REG_REMOTE_LOW_MSB, | |
323 | LM63_REG_REMOTE_LOW_LSB, | |
324 | LM63_REG_REMOTE_HIGH_MSB, | |
325 | LM63_REG_REMOTE_HIGH_LSB, | |
326 | }; | |
327 | ||
328 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
329 | struct i2c_client *client = to_i2c_client(dev); | |
330 | struct lm63_data *data = i2c_get_clientdata(client); | |
662bda28 GR |
331 | long val; |
332 | int err; | |
bc51ae11 JD |
333 | int nr = attr->index; |
334 | ||
662bda28 GR |
335 | err = kstrtol(buf, 10, &val); |
336 | if (err) | |
337 | return err; | |
338 | ||
9a61bf63 | 339 | mutex_lock(&data->update_lock); |
2778fb13 | 340 | data->temp11[nr] = TEMP11_TO_REG(val - data->temp2_offset); |
bc51ae11 JD |
341 | i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], |
342 | data->temp11[nr] >> 8); | |
343 | i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], | |
344 | data->temp11[nr] & 0xff); | |
9a61bf63 | 345 | mutex_unlock(&data->update_lock); |
bc51ae11 | 346 | return count; |
1da177e4 | 347 | } |
1da177e4 | 348 | |
662bda28 GR |
349 | /* |
350 | * Hysteresis register holds a relative value, while we want to present | |
351 | * an absolute to user-space | |
352 | */ | |
353 | static ssize_t show_temp2_crit_hyst(struct device *dev, | |
354 | struct device_attribute *dummy, char *buf) | |
1da177e4 LT |
355 | { |
356 | struct lm63_data *data = lm63_update_device(dev); | |
bc51ae11 | 357 | return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2]) |
2778fb13 | 358 | + data->temp2_offset |
1da177e4 LT |
359 | - TEMP8_FROM_REG(data->temp2_crit_hyst)); |
360 | } | |
361 | ||
662bda28 GR |
362 | /* |
363 | * And now the other way around, user-space provides an absolute | |
364 | * hysteresis value and we have to store a relative one | |
365 | */ | |
366 | static ssize_t set_temp2_crit_hyst(struct device *dev, | |
367 | struct device_attribute *dummy, | |
bc51ae11 | 368 | const char *buf, size_t count) |
1da177e4 LT |
369 | { |
370 | struct i2c_client *client = to_i2c_client(dev); | |
371 | struct lm63_data *data = i2c_get_clientdata(client); | |
662bda28 GR |
372 | long val; |
373 | int err; | |
1da177e4 LT |
374 | long hyst; |
375 | ||
662bda28 GR |
376 | err = kstrtol(buf, 10, &val); |
377 | if (err) | |
378 | return err; | |
379 | ||
9a61bf63 | 380 | mutex_lock(&data->update_lock); |
2778fb13 | 381 | hyst = TEMP8_FROM_REG(data->temp8[2]) + data->temp2_offset - val; |
1da177e4 LT |
382 | i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, |
383 | HYST_TO_REG(hyst)); | |
9a61bf63 | 384 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
385 | return count; |
386 | } | |
387 | ||
bc51ae11 JD |
388 | static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, |
389 | char *buf) | |
1da177e4 LT |
390 | { |
391 | struct lm63_data *data = lm63_update_device(dev); | |
392 | return sprintf(buf, "%u\n", data->alarms); | |
393 | } | |
394 | ||
2d45771e JD |
395 | static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr, |
396 | char *buf) | |
397 | { | |
398 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
399 | struct lm63_data *data = lm63_update_device(dev); | |
400 | int bitnr = attr->index; | |
401 | ||
402 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
403 | } | |
404 | ||
bc51ae11 JD |
405 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); |
406 | static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, | |
407 | set_fan, 1); | |
1da177e4 LT |
408 | |
409 | static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1); | |
410 | static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL); | |
411 | ||
2778fb13 DE |
412 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_local_temp8, NULL, 0); |
413 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_local_temp8, | |
414 | set_local_temp8, 1); | |
1da177e4 | 415 | |
bc51ae11 JD |
416 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); |
417 | static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, | |
418 | set_temp11, 1); | |
419 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, | |
420 | set_temp11, 2); | |
2778fb13 DE |
421 | /* |
422 | * On LM63, temp2_crit can be set only once, which should be job | |
423 | * of the bootloader. | |
424 | */ | |
425 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_remote_temp8, | |
426 | NULL, 2); | |
1da177e4 LT |
427 | static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst, |
428 | set_temp2_crit_hyst); | |
429 | ||
2d45771e JD |
430 | /* Individual alarm files */ |
431 | static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0); | |
432 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); | |
7817a39e | 433 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); |
2d45771e JD |
434 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); |
435 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); | |
436 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); | |
437 | /* Raw alarm file for compatibility */ | |
1da177e4 LT |
438 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
439 | ||
0e39e01c JD |
440 | static struct attribute *lm63_attributes[] = { |
441 | &dev_attr_pwm1.attr, | |
442 | &dev_attr_pwm1_enable.attr, | |
443 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
444 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
445 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
446 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
447 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
448 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
449 | &dev_attr_temp2_crit_hyst.attr, | |
450 | ||
451 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
7817a39e | 452 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
0e39e01c JD |
453 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
454 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
455 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
456 | &dev_attr_alarms.attr, | |
457 | NULL | |
458 | }; | |
459 | ||
460 | static const struct attribute_group lm63_group = { | |
461 | .attrs = lm63_attributes, | |
462 | }; | |
463 | ||
464 | static struct attribute *lm63_attributes_fan1[] = { | |
465 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
466 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
467 | ||
468 | &sensor_dev_attr_fan1_min_alarm.dev_attr.attr, | |
469 | NULL | |
470 | }; | |
471 | ||
472 | static const struct attribute_group lm63_group_fan1 = { | |
473 | .attrs = lm63_attributes_fan1, | |
474 | }; | |
475 | ||
1da177e4 LT |
476 | /* |
477 | * Real code | |
478 | */ | |
479 | ||
d5957be2 | 480 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 481 | static int lm63_detect(struct i2c_client *new_client, |
d5957be2 | 482 | struct i2c_board_info *info) |
1da177e4 | 483 | { |
d5957be2 | 484 | struct i2c_adapter *adapter = new_client->adapter; |
52df6440 JD |
485 | u8 man_id, chip_id, reg_config1, reg_config2; |
486 | u8 reg_alert_status, reg_alert_mask; | |
10f2ed31 | 487 | int address = new_client->addr; |
1da177e4 LT |
488 | |
489 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
d5957be2 | 490 | return -ENODEV; |
1da177e4 | 491 | |
52df6440 JD |
492 | man_id = i2c_smbus_read_byte_data(new_client, LM63_REG_MAN_ID); |
493 | chip_id = i2c_smbus_read_byte_data(new_client, LM63_REG_CHIP_ID); | |
494 | ||
495 | reg_config1 = i2c_smbus_read_byte_data(new_client, | |
496 | LM63_REG_CONFIG1); | |
497 | reg_config2 = i2c_smbus_read_byte_data(new_client, | |
498 | LM63_REG_CONFIG2); | |
499 | reg_alert_status = i2c_smbus_read_byte_data(new_client, | |
500 | LM63_REG_ALERT_STATUS); | |
501 | reg_alert_mask = i2c_smbus_read_byte_data(new_client, | |
502 | LM63_REG_ALERT_MASK); | |
503 | ||
504 | if (man_id != 0x01 /* National Semiconductor */ | |
52df6440 JD |
505 | || (reg_config1 & 0x18) != 0x00 |
506 | || (reg_config2 & 0xF8) != 0x00 | |
507 | || (reg_alert_status & 0x20) != 0x00 | |
508 | || (reg_alert_mask & 0xA4) != 0xA4) { | |
509 | dev_dbg(&adapter->dev, | |
510 | "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n", | |
511 | man_id, chip_id); | |
512 | return -ENODEV; | |
1da177e4 LT |
513 | } |
514 | ||
10f2ed31 MG |
515 | if (chip_id == 0x41 && address == 0x4c) |
516 | strlcpy(info->type, "lm63", I2C_NAME_SIZE); | |
517 | else if (chip_id == 0x51 && (address == 0x18 || address == 0x4e)) | |
518 | strlcpy(info->type, "lm64", I2C_NAME_SIZE); | |
519 | else | |
520 | return -ENODEV; | |
d5957be2 JD |
521 | |
522 | return 0; | |
523 | } | |
524 | ||
525 | static int lm63_probe(struct i2c_client *new_client, | |
526 | const struct i2c_device_id *id) | |
527 | { | |
528 | struct lm63_data *data; | |
529 | int err; | |
530 | ||
531 | data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL); | |
532 | if (!data) { | |
533 | err = -ENOMEM; | |
534 | goto exit; | |
535 | } | |
536 | ||
537 | i2c_set_clientdata(new_client, data); | |
1da177e4 | 538 | data->valid = 0; |
9a61bf63 | 539 | mutex_init(&data->update_lock); |
1da177e4 | 540 | |
2778fb13 DE |
541 | /* Set the device type */ |
542 | data->kind = id->driver_data; | |
543 | if (data->kind == lm64) | |
544 | data->temp2_offset = 16000; | |
545 | ||
546 | /* Initialize chip */ | |
1da177e4 LT |
547 | lm63_init_client(new_client); |
548 | ||
549 | /* Register sysfs hooks */ | |
662bda28 GR |
550 | err = sysfs_create_group(&new_client->dev.kobj, &lm63_group); |
551 | if (err) | |
d5957be2 | 552 | goto exit_free; |
0e39e01c | 553 | if (data->config & 0x04) { /* tachometer enabled */ |
662bda28 GR |
554 | err = sysfs_create_group(&new_client->dev.kobj, |
555 | &lm63_group_fan1); | |
556 | if (err) | |
0e39e01c | 557 | goto exit_remove_files; |
943b0830 MH |
558 | } |
559 | ||
1beeffe4 TJ |
560 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
561 | if (IS_ERR(data->hwmon_dev)) { | |
562 | err = PTR_ERR(data->hwmon_dev); | |
0e39e01c | 563 | goto exit_remove_files; |
1da177e4 | 564 | } |
1da177e4 LT |
565 | |
566 | return 0; | |
567 | ||
0e39e01c JD |
568 | exit_remove_files: |
569 | sysfs_remove_group(&new_client->dev.kobj, &lm63_group); | |
570 | sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1); | |
1da177e4 LT |
571 | exit_free: |
572 | kfree(data); | |
573 | exit: | |
574 | return err; | |
575 | } | |
576 | ||
662bda28 GR |
577 | /* |
578 | * Ideally we shouldn't have to initialize anything, since the BIOS | |
579 | * should have taken care of everything | |
580 | */ | |
1da177e4 LT |
581 | static void lm63_init_client(struct i2c_client *client) |
582 | { | |
583 | struct lm63_data *data = i2c_get_clientdata(client); | |
584 | ||
585 | data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); | |
586 | data->config_fan = i2c_smbus_read_byte_data(client, | |
587 | LM63_REG_CONFIG_FAN); | |
588 | ||
589 | /* Start converting if needed */ | |
590 | if (data->config & 0x40) { /* standby */ | |
898eb71c | 591 | dev_dbg(&client->dev, "Switching to operational mode\n"); |
1da177e4 LT |
592 | data->config &= 0xA7; |
593 | i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, | |
594 | data->config); | |
595 | } | |
596 | ||
597 | /* We may need pwm1_freq before ever updating the client data */ | |
598 | data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); | |
599 | if (data->pwm1_freq == 0) | |
600 | data->pwm1_freq = 1; | |
601 | ||
602 | /* Show some debug info about the LM63 configuration */ | |
603 | dev_dbg(&client->dev, "Alert/tach pin configured for %s\n", | |
604 | (data->config & 0x04) ? "tachometer input" : | |
605 | "alert output"); | |
606 | dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n", | |
607 | (data->config_fan & 0x08) ? "1.4" : "360", | |
608 | ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); | |
609 | dev_dbg(&client->dev, "PWM output active %s, %s mode\n", | |
610 | (data->config_fan & 0x10) ? "low" : "high", | |
611 | (data->config_fan & 0x20) ? "manual" : "auto"); | |
612 | } | |
613 | ||
d5957be2 | 614 | static int lm63_remove(struct i2c_client *client) |
1da177e4 | 615 | { |
943b0830 | 616 | struct lm63_data *data = i2c_get_clientdata(client); |
1da177e4 | 617 | |
1beeffe4 | 618 | hwmon_device_unregister(data->hwmon_dev); |
0e39e01c JD |
619 | sysfs_remove_group(&client->dev.kobj, &lm63_group); |
620 | sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1); | |
943b0830 | 621 | |
943b0830 | 622 | kfree(data); |
1da177e4 LT |
623 | return 0; |
624 | } | |
625 | ||
626 | static struct lm63_data *lm63_update_device(struct device *dev) | |
627 | { | |
628 | struct i2c_client *client = to_i2c_client(dev); | |
629 | struct lm63_data *data = i2c_get_clientdata(client); | |
630 | ||
9a61bf63 | 631 | mutex_lock(&data->update_lock); |
1da177e4 LT |
632 | |
633 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
634 | if (data->config & 0x04) { /* tachometer enabled */ | |
635 | /* order matters for fan1_input */ | |
bc51ae11 JD |
636 | data->fan[0] = i2c_smbus_read_byte_data(client, |
637 | LM63_REG_TACH_COUNT_LSB) & 0xFC; | |
638 | data->fan[0] |= i2c_smbus_read_byte_data(client, | |
639 | LM63_REG_TACH_COUNT_MSB) << 8; | |
640 | data->fan[1] = (i2c_smbus_read_byte_data(client, | |
641 | LM63_REG_TACH_LIMIT_LSB) & 0xFC) | |
642 | | (i2c_smbus_read_byte_data(client, | |
643 | LM63_REG_TACH_LIMIT_MSB) << 8); | |
1da177e4 LT |
644 | } |
645 | ||
646 | data->pwm1_freq = i2c_smbus_read_byte_data(client, | |
647 | LM63_REG_PWM_FREQ); | |
648 | if (data->pwm1_freq == 0) | |
649 | data->pwm1_freq = 1; | |
650 | data->pwm1_value = i2c_smbus_read_byte_data(client, | |
651 | LM63_REG_PWM_VALUE); | |
652 | ||
bc51ae11 JD |
653 | data->temp8[0] = i2c_smbus_read_byte_data(client, |
654 | LM63_REG_LOCAL_TEMP); | |
655 | data->temp8[1] = i2c_smbus_read_byte_data(client, | |
656 | LM63_REG_LOCAL_HIGH); | |
1da177e4 LT |
657 | |
658 | /* order matters for temp2_input */ | |
bc51ae11 JD |
659 | data->temp11[0] = i2c_smbus_read_byte_data(client, |
660 | LM63_REG_REMOTE_TEMP_MSB) << 8; | |
661 | data->temp11[0] |= i2c_smbus_read_byte_data(client, | |
662 | LM63_REG_REMOTE_TEMP_LSB); | |
663 | data->temp11[1] = (i2c_smbus_read_byte_data(client, | |
1da177e4 LT |
664 | LM63_REG_REMOTE_LOW_MSB) << 8) |
665 | | i2c_smbus_read_byte_data(client, | |
666 | LM63_REG_REMOTE_LOW_LSB); | |
bc51ae11 JD |
667 | data->temp11[2] = (i2c_smbus_read_byte_data(client, |
668 | LM63_REG_REMOTE_HIGH_MSB) << 8) | |
669 | | i2c_smbus_read_byte_data(client, | |
670 | LM63_REG_REMOTE_HIGH_LSB); | |
671 | data->temp8[2] = i2c_smbus_read_byte_data(client, | |
672 | LM63_REG_REMOTE_TCRIT); | |
1da177e4 LT |
673 | data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, |
674 | LM63_REG_REMOTE_TCRIT_HYST); | |
675 | ||
676 | data->alarms = i2c_smbus_read_byte_data(client, | |
677 | LM63_REG_ALERT_STATUS) & 0x7F; | |
678 | ||
679 | data->last_updated = jiffies; | |
680 | data->valid = 1; | |
681 | } | |
682 | ||
9a61bf63 | 683 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
684 | |
685 | return data; | |
686 | } | |
687 | ||
688 | static int __init sensors_lm63_init(void) | |
689 | { | |
690 | return i2c_add_driver(&lm63_driver); | |
691 | } | |
692 | ||
693 | static void __exit sensors_lm63_exit(void) | |
694 | { | |
695 | i2c_del_driver(&lm63_driver); | |
696 | } | |
697 | ||
698 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); | |
699 | MODULE_DESCRIPTION("LM63 driver"); | |
700 | MODULE_LICENSE("GPL"); | |
701 | ||
702 | module_init(sensors_lm63_init); | |
703 | module_exit(sensors_lm63_exit); |