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 LT |
57 | |
58 | /* | |
59 | * Insmod parameters | |
60 | */ | |
61 | ||
f4b50261 | 62 | I2C_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 | ||
d5957be2 JD |
131 | static int lm63_probe(struct i2c_client *client, |
132 | const struct i2c_device_id *id); | |
133 | static int lm63_remove(struct i2c_client *client); | |
1da177e4 LT |
134 | |
135 | static struct lm63_data *lm63_update_device(struct device *dev); | |
136 | ||
310ec792 | 137 | static int lm63_detect(struct i2c_client *client, struct i2c_board_info *info); |
1da177e4 LT |
138 | static void lm63_init_client(struct i2c_client *client); |
139 | ||
140 | /* | |
141 | * Driver data (common to all clients) | |
142 | */ | |
143 | ||
d5957be2 JD |
144 | static const struct i2c_device_id lm63_id[] = { |
145 | { "lm63", lm63 }, | |
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, | |
159 | .address_data = &addr_data, | |
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 */ | |
171 | ||
172 | /* registers values */ | |
173 | u8 config, config_fan; | |
bc51ae11 JD |
174 | u16 fan[2]; /* 0: input |
175 | 1: low limit */ | |
1da177e4 LT |
176 | u8 pwm1_freq; |
177 | u8 pwm1_value; | |
bc51ae11 JD |
178 | s8 temp8[3]; /* 0: local input |
179 | 1: local high limit | |
180 | 2: remote critical limit */ | |
181 | s16 temp11[3]; /* 0: remote input | |
182 | 1: remote low limit | |
183 | 2: remote high limit */ | |
1da177e4 LT |
184 | u8 temp2_crit_hyst; |
185 | u8 alarms; | |
186 | }; | |
187 | ||
188 | /* | |
189 | * Sysfs callback functions and files | |
190 | */ | |
191 | ||
bc51ae11 JD |
192 | static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, |
193 | char *buf) | |
194 | { | |
195 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
196 | struct lm63_data *data = lm63_update_device(dev); | |
197 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index])); | |
1da177e4 | 198 | } |
1da177e4 | 199 | |
bc51ae11 JD |
200 | static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, |
201 | const char *buf, size_t count) | |
1da177e4 LT |
202 | { |
203 | struct i2c_client *client = to_i2c_client(dev); | |
204 | struct lm63_data *data = i2c_get_clientdata(client); | |
205 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
206 | ||
9a61bf63 | 207 | mutex_lock(&data->update_lock); |
bc51ae11 | 208 | data->fan[1] = FAN_TO_REG(val); |
1da177e4 | 209 | i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, |
bc51ae11 | 210 | data->fan[1] & 0xFF); |
1da177e4 | 211 | i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, |
bc51ae11 | 212 | data->fan[1] >> 8); |
9a61bf63 | 213 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
214 | return count; |
215 | } | |
216 | ||
bc51ae11 JD |
217 | static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy, |
218 | char *buf) | |
1da177e4 LT |
219 | { |
220 | struct lm63_data *data = lm63_update_device(dev); | |
221 | return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ? | |
222 | 255 : (data->pwm1_value * 255 + data->pwm1_freq) / | |
223 | (2 * data->pwm1_freq)); | |
224 | } | |
225 | ||
bc51ae11 JD |
226 | static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy, |
227 | const char *buf, size_t count) | |
1da177e4 LT |
228 | { |
229 | struct i2c_client *client = to_i2c_client(dev); | |
230 | struct lm63_data *data = i2c_get_clientdata(client); | |
231 | unsigned long val; | |
232 | ||
233 | if (!(data->config_fan & 0x20)) /* register is read-only */ | |
234 | return -EPERM; | |
235 | ||
236 | val = simple_strtoul(buf, NULL, 10); | |
9a61bf63 | 237 | mutex_lock(&data->update_lock); |
1da177e4 LT |
238 | data->pwm1_value = val <= 0 ? 0 : |
239 | val >= 255 ? 2 * data->pwm1_freq : | |
240 | (val * data->pwm1_freq * 2 + 127) / 255; | |
241 | i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value); | |
9a61bf63 | 242 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
243 | return count; |
244 | } | |
245 | ||
bc51ae11 JD |
246 | static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy, |
247 | char *buf) | |
1da177e4 LT |
248 | { |
249 | struct lm63_data *data = lm63_update_device(dev); | |
250 | return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); | |
251 | } | |
252 | ||
bc51ae11 JD |
253 | static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr, |
254 | char *buf) | |
255 | { | |
256 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
257 | struct lm63_data *data = lm63_update_device(dev); | |
258 | return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])); | |
1da177e4 | 259 | } |
bc51ae11 JD |
260 | |
261 | static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy, | |
262 | const char *buf, size_t count) | |
263 | { | |
264 | struct i2c_client *client = to_i2c_client(dev); | |
265 | struct lm63_data *data = i2c_get_clientdata(client); | |
266 | long val = simple_strtol(buf, NULL, 10); | |
267 | ||
9a61bf63 | 268 | mutex_lock(&data->update_lock); |
bc51ae11 JD |
269 | data->temp8[1] = TEMP8_TO_REG(val); |
270 | i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]); | |
9a61bf63 | 271 | mutex_unlock(&data->update_lock); |
bc51ae11 | 272 | return count; |
1da177e4 | 273 | } |
bc51ae11 JD |
274 | |
275 | static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, | |
276 | char *buf) | |
277 | { | |
278 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
279 | struct lm63_data *data = lm63_update_device(dev); | |
280 | return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index])); | |
1da177e4 | 281 | } |
bc51ae11 JD |
282 | |
283 | static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, | |
284 | const char *buf, size_t count) | |
285 | { | |
286 | static const u8 reg[4] = { | |
287 | LM63_REG_REMOTE_LOW_MSB, | |
288 | LM63_REG_REMOTE_LOW_LSB, | |
289 | LM63_REG_REMOTE_HIGH_MSB, | |
290 | LM63_REG_REMOTE_HIGH_LSB, | |
291 | }; | |
292 | ||
293 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
294 | struct i2c_client *client = to_i2c_client(dev); | |
295 | struct lm63_data *data = i2c_get_clientdata(client); | |
296 | long val = simple_strtol(buf, NULL, 10); | |
297 | int nr = attr->index; | |
298 | ||
9a61bf63 | 299 | mutex_lock(&data->update_lock); |
bc51ae11 JD |
300 | data->temp11[nr] = TEMP11_TO_REG(val); |
301 | i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], | |
302 | data->temp11[nr] >> 8); | |
303 | i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], | |
304 | data->temp11[nr] & 0xff); | |
9a61bf63 | 305 | mutex_unlock(&data->update_lock); |
bc51ae11 | 306 | return count; |
1da177e4 | 307 | } |
1da177e4 LT |
308 | |
309 | /* Hysteresis register holds a relative value, while we want to present | |
310 | an absolute to user-space */ | |
bc51ae11 JD |
311 | static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy, |
312 | char *buf) | |
1da177e4 LT |
313 | { |
314 | struct lm63_data *data = lm63_update_device(dev); | |
bc51ae11 | 315 | return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2]) |
1da177e4 LT |
316 | - TEMP8_FROM_REG(data->temp2_crit_hyst)); |
317 | } | |
318 | ||
319 | /* And now the other way around, user-space provides an absolute | |
320 | hysteresis value and we have to store a relative one */ | |
bc51ae11 JD |
321 | static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy, |
322 | const char *buf, size_t count) | |
1da177e4 LT |
323 | { |
324 | struct i2c_client *client = to_i2c_client(dev); | |
325 | struct lm63_data *data = i2c_get_clientdata(client); | |
326 | long val = simple_strtol(buf, NULL, 10); | |
327 | long hyst; | |
328 | ||
9a61bf63 | 329 | mutex_lock(&data->update_lock); |
bc51ae11 | 330 | hyst = TEMP8_FROM_REG(data->temp8[2]) - val; |
1da177e4 LT |
331 | i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, |
332 | HYST_TO_REG(hyst)); | |
9a61bf63 | 333 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
334 | return count; |
335 | } | |
336 | ||
bc51ae11 JD |
337 | static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, |
338 | char *buf) | |
1da177e4 LT |
339 | { |
340 | struct lm63_data *data = lm63_update_device(dev); | |
341 | return sprintf(buf, "%u\n", data->alarms); | |
342 | } | |
343 | ||
2d45771e JD |
344 | static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr, |
345 | char *buf) | |
346 | { | |
347 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
348 | struct lm63_data *data = lm63_update_device(dev); | |
349 | int bitnr = attr->index; | |
350 | ||
351 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
352 | } | |
353 | ||
bc51ae11 JD |
354 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); |
355 | static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, | |
356 | set_fan, 1); | |
1da177e4 LT |
357 | |
358 | static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1); | |
359 | static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL); | |
360 | ||
bc51ae11 JD |
361 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0); |
362 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8, | |
363 | set_temp8, 1); | |
1da177e4 | 364 | |
bc51ae11 JD |
365 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); |
366 | static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, | |
367 | set_temp11, 1); | |
368 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, | |
369 | set_temp11, 2); | |
370 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2); | |
1da177e4 LT |
371 | static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst, |
372 | set_temp2_crit_hyst); | |
373 | ||
2d45771e JD |
374 | /* Individual alarm files */ |
375 | static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0); | |
376 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); | |
7817a39e | 377 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); |
2d45771e JD |
378 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); |
379 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); | |
380 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); | |
381 | /* Raw alarm file for compatibility */ | |
1da177e4 LT |
382 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
383 | ||
0e39e01c JD |
384 | static struct attribute *lm63_attributes[] = { |
385 | &dev_attr_pwm1.attr, | |
386 | &dev_attr_pwm1_enable.attr, | |
387 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
388 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
389 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
390 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
391 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
392 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
393 | &dev_attr_temp2_crit_hyst.attr, | |
394 | ||
395 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
7817a39e | 396 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
0e39e01c JD |
397 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
398 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
399 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
400 | &dev_attr_alarms.attr, | |
401 | NULL | |
402 | }; | |
403 | ||
404 | static const struct attribute_group lm63_group = { | |
405 | .attrs = lm63_attributes, | |
406 | }; | |
407 | ||
408 | static struct attribute *lm63_attributes_fan1[] = { | |
409 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
410 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
411 | ||
412 | &sensor_dev_attr_fan1_min_alarm.dev_attr.attr, | |
413 | NULL | |
414 | }; | |
415 | ||
416 | static const struct attribute_group lm63_group_fan1 = { | |
417 | .attrs = lm63_attributes_fan1, | |
418 | }; | |
419 | ||
1da177e4 LT |
420 | /* |
421 | * Real code | |
422 | */ | |
423 | ||
d5957be2 | 424 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 425 | static int lm63_detect(struct i2c_client *new_client, |
d5957be2 | 426 | struct i2c_board_info *info) |
1da177e4 | 427 | { |
d5957be2 | 428 | struct i2c_adapter *adapter = new_client->adapter; |
52df6440 JD |
429 | u8 man_id, chip_id, reg_config1, reg_config2; |
430 | u8 reg_alert_status, reg_alert_mask; | |
1da177e4 LT |
431 | |
432 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
d5957be2 | 433 | return -ENODEV; |
1da177e4 | 434 | |
52df6440 JD |
435 | man_id = i2c_smbus_read_byte_data(new_client, LM63_REG_MAN_ID); |
436 | chip_id = i2c_smbus_read_byte_data(new_client, LM63_REG_CHIP_ID); | |
437 | ||
438 | reg_config1 = i2c_smbus_read_byte_data(new_client, | |
439 | LM63_REG_CONFIG1); | |
440 | reg_config2 = i2c_smbus_read_byte_data(new_client, | |
441 | LM63_REG_CONFIG2); | |
442 | reg_alert_status = i2c_smbus_read_byte_data(new_client, | |
443 | LM63_REG_ALERT_STATUS); | |
444 | reg_alert_mask = i2c_smbus_read_byte_data(new_client, | |
445 | LM63_REG_ALERT_MASK); | |
446 | ||
447 | if (man_id != 0x01 /* National Semiconductor */ | |
448 | || chip_id != 0x41 /* LM63 */ | |
449 | || (reg_config1 & 0x18) != 0x00 | |
450 | || (reg_config2 & 0xF8) != 0x00 | |
451 | || (reg_alert_status & 0x20) != 0x00 | |
452 | || (reg_alert_mask & 0xA4) != 0xA4) { | |
453 | dev_dbg(&adapter->dev, | |
454 | "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n", | |
455 | man_id, chip_id); | |
456 | return -ENODEV; | |
1da177e4 LT |
457 | } |
458 | ||
d5957be2 JD |
459 | strlcpy(info->type, "lm63", I2C_NAME_SIZE); |
460 | ||
461 | return 0; | |
462 | } | |
463 | ||
464 | static int lm63_probe(struct i2c_client *new_client, | |
465 | const struct i2c_device_id *id) | |
466 | { | |
467 | struct lm63_data *data; | |
468 | int err; | |
469 | ||
470 | data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL); | |
471 | if (!data) { | |
472 | err = -ENOMEM; | |
473 | goto exit; | |
474 | } | |
475 | ||
476 | i2c_set_clientdata(new_client, data); | |
1da177e4 | 477 | data->valid = 0; |
9a61bf63 | 478 | mutex_init(&data->update_lock); |
1da177e4 | 479 | |
1da177e4 LT |
480 | /* Initialize the LM63 chip */ |
481 | lm63_init_client(new_client); | |
482 | ||
483 | /* Register sysfs hooks */ | |
0e39e01c JD |
484 | if ((err = sysfs_create_group(&new_client->dev.kobj, |
485 | &lm63_group))) | |
d5957be2 | 486 | goto exit_free; |
0e39e01c JD |
487 | if (data->config & 0x04) { /* tachometer enabled */ |
488 | if ((err = sysfs_create_group(&new_client->dev.kobj, | |
489 | &lm63_group_fan1))) | |
490 | goto exit_remove_files; | |
943b0830 MH |
491 | } |
492 | ||
1beeffe4 TJ |
493 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
494 | if (IS_ERR(data->hwmon_dev)) { | |
495 | err = PTR_ERR(data->hwmon_dev); | |
0e39e01c | 496 | goto exit_remove_files; |
1da177e4 | 497 | } |
1da177e4 LT |
498 | |
499 | return 0; | |
500 | ||
0e39e01c JD |
501 | exit_remove_files: |
502 | sysfs_remove_group(&new_client->dev.kobj, &lm63_group); | |
503 | sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1); | |
1da177e4 LT |
504 | exit_free: |
505 | kfree(data); | |
506 | exit: | |
507 | return err; | |
508 | } | |
509 | ||
510 | /* Idealy we shouldn't have to initialize anything, since the BIOS | |
511 | should have taken care of everything */ | |
512 | static void lm63_init_client(struct i2c_client *client) | |
513 | { | |
514 | struct lm63_data *data = i2c_get_clientdata(client); | |
515 | ||
516 | data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); | |
517 | data->config_fan = i2c_smbus_read_byte_data(client, | |
518 | LM63_REG_CONFIG_FAN); | |
519 | ||
520 | /* Start converting if needed */ | |
521 | if (data->config & 0x40) { /* standby */ | |
898eb71c | 522 | dev_dbg(&client->dev, "Switching to operational mode\n"); |
1da177e4 LT |
523 | data->config &= 0xA7; |
524 | i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, | |
525 | data->config); | |
526 | } | |
527 | ||
528 | /* We may need pwm1_freq before ever updating the client data */ | |
529 | data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); | |
530 | if (data->pwm1_freq == 0) | |
531 | data->pwm1_freq = 1; | |
532 | ||
533 | /* Show some debug info about the LM63 configuration */ | |
534 | dev_dbg(&client->dev, "Alert/tach pin configured for %s\n", | |
535 | (data->config & 0x04) ? "tachometer input" : | |
536 | "alert output"); | |
537 | dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n", | |
538 | (data->config_fan & 0x08) ? "1.4" : "360", | |
539 | ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); | |
540 | dev_dbg(&client->dev, "PWM output active %s, %s mode\n", | |
541 | (data->config_fan & 0x10) ? "low" : "high", | |
542 | (data->config_fan & 0x20) ? "manual" : "auto"); | |
543 | } | |
544 | ||
d5957be2 | 545 | static int lm63_remove(struct i2c_client *client) |
1da177e4 | 546 | { |
943b0830 | 547 | struct lm63_data *data = i2c_get_clientdata(client); |
1da177e4 | 548 | |
1beeffe4 | 549 | hwmon_device_unregister(data->hwmon_dev); |
0e39e01c JD |
550 | sysfs_remove_group(&client->dev.kobj, &lm63_group); |
551 | sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1); | |
943b0830 | 552 | |
943b0830 | 553 | kfree(data); |
1da177e4 LT |
554 | return 0; |
555 | } | |
556 | ||
557 | static struct lm63_data *lm63_update_device(struct device *dev) | |
558 | { | |
559 | struct i2c_client *client = to_i2c_client(dev); | |
560 | struct lm63_data *data = i2c_get_clientdata(client); | |
561 | ||
9a61bf63 | 562 | mutex_lock(&data->update_lock); |
1da177e4 LT |
563 | |
564 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
565 | if (data->config & 0x04) { /* tachometer enabled */ | |
566 | /* order matters for fan1_input */ | |
bc51ae11 JD |
567 | data->fan[0] = i2c_smbus_read_byte_data(client, |
568 | LM63_REG_TACH_COUNT_LSB) & 0xFC; | |
569 | data->fan[0] |= i2c_smbus_read_byte_data(client, | |
570 | LM63_REG_TACH_COUNT_MSB) << 8; | |
571 | data->fan[1] = (i2c_smbus_read_byte_data(client, | |
572 | LM63_REG_TACH_LIMIT_LSB) & 0xFC) | |
573 | | (i2c_smbus_read_byte_data(client, | |
574 | LM63_REG_TACH_LIMIT_MSB) << 8); | |
1da177e4 LT |
575 | } |
576 | ||
577 | data->pwm1_freq = i2c_smbus_read_byte_data(client, | |
578 | LM63_REG_PWM_FREQ); | |
579 | if (data->pwm1_freq == 0) | |
580 | data->pwm1_freq = 1; | |
581 | data->pwm1_value = i2c_smbus_read_byte_data(client, | |
582 | LM63_REG_PWM_VALUE); | |
583 | ||
bc51ae11 JD |
584 | data->temp8[0] = i2c_smbus_read_byte_data(client, |
585 | LM63_REG_LOCAL_TEMP); | |
586 | data->temp8[1] = i2c_smbus_read_byte_data(client, | |
587 | LM63_REG_LOCAL_HIGH); | |
1da177e4 LT |
588 | |
589 | /* order matters for temp2_input */ | |
bc51ae11 JD |
590 | data->temp11[0] = i2c_smbus_read_byte_data(client, |
591 | LM63_REG_REMOTE_TEMP_MSB) << 8; | |
592 | data->temp11[0] |= i2c_smbus_read_byte_data(client, | |
593 | LM63_REG_REMOTE_TEMP_LSB); | |
594 | data->temp11[1] = (i2c_smbus_read_byte_data(client, | |
1da177e4 LT |
595 | LM63_REG_REMOTE_LOW_MSB) << 8) |
596 | | i2c_smbus_read_byte_data(client, | |
597 | LM63_REG_REMOTE_LOW_LSB); | |
bc51ae11 JD |
598 | data->temp11[2] = (i2c_smbus_read_byte_data(client, |
599 | LM63_REG_REMOTE_HIGH_MSB) << 8) | |
600 | | i2c_smbus_read_byte_data(client, | |
601 | LM63_REG_REMOTE_HIGH_LSB); | |
602 | data->temp8[2] = i2c_smbus_read_byte_data(client, | |
603 | LM63_REG_REMOTE_TCRIT); | |
1da177e4 LT |
604 | data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, |
605 | LM63_REG_REMOTE_TCRIT_HYST); | |
606 | ||
607 | data->alarms = i2c_smbus_read_byte_data(client, | |
608 | LM63_REG_ALERT_STATUS) & 0x7F; | |
609 | ||
610 | data->last_updated = jiffies; | |
611 | data->valid = 1; | |
612 | } | |
613 | ||
9a61bf63 | 614 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
615 | |
616 | return data; | |
617 | } | |
618 | ||
619 | static int __init sensors_lm63_init(void) | |
620 | { | |
621 | return i2c_add_driver(&lm63_driver); | |
622 | } | |
623 | ||
624 | static void __exit sensors_lm63_exit(void) | |
625 | { | |
626 | i2c_del_driver(&lm63_driver); | |
627 | } | |
628 | ||
629 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); | |
630 | MODULE_DESCRIPTION("LM63 driver"); | |
631 | MODULE_LICENSE("GPL"); | |
632 | ||
633 | module_init(sensors_lm63_init); | |
634 | module_exit(sensors_lm63_exit); |