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 | ||
d5957be2 JD |
137 | static int lm63_detect(struct i2c_client *client, int kind, |
138 | struct i2c_board_info *info); | |
1da177e4 LT |
139 | static void lm63_init_client(struct i2c_client *client); |
140 | ||
141 | /* | |
142 | * Driver data (common to all clients) | |
143 | */ | |
144 | ||
d5957be2 JD |
145 | static const struct i2c_device_id lm63_id[] = { |
146 | { "lm63", lm63 }, | |
147 | { } | |
148 | }; | |
149 | MODULE_DEVICE_TABLE(i2c, lm63_id); | |
150 | ||
1da177e4 | 151 | static struct i2c_driver lm63_driver = { |
d5957be2 | 152 | .class = I2C_CLASS_HWMON, |
cdaf7934 | 153 | .driver = { |
cdaf7934 LR |
154 | .name = "lm63", |
155 | }, | |
d5957be2 JD |
156 | .probe = lm63_probe, |
157 | .remove = lm63_remove, | |
158 | .id_table = lm63_id, | |
159 | .detect = lm63_detect, | |
160 | .address_data = &addr_data, | |
1da177e4 LT |
161 | }; |
162 | ||
163 | /* | |
164 | * Client data (each client gets its own) | |
165 | */ | |
166 | ||
167 | struct lm63_data { | |
1beeffe4 | 168 | struct device *hwmon_dev; |
9a61bf63 | 169 | struct mutex update_lock; |
1da177e4 LT |
170 | char valid; /* zero until following fields are valid */ |
171 | unsigned long last_updated; /* in jiffies */ | |
172 | ||
173 | /* registers values */ | |
174 | u8 config, config_fan; | |
bc51ae11 JD |
175 | u16 fan[2]; /* 0: input |
176 | 1: low limit */ | |
1da177e4 LT |
177 | u8 pwm1_freq; |
178 | u8 pwm1_value; | |
bc51ae11 JD |
179 | s8 temp8[3]; /* 0: local input |
180 | 1: local high limit | |
181 | 2: remote critical limit */ | |
182 | s16 temp11[3]; /* 0: remote input | |
183 | 1: remote low limit | |
184 | 2: remote high limit */ | |
1da177e4 LT |
185 | u8 temp2_crit_hyst; |
186 | u8 alarms; | |
187 | }; | |
188 | ||
189 | /* | |
190 | * Sysfs callback functions and files | |
191 | */ | |
192 | ||
bc51ae11 JD |
193 | static ssize_t show_fan(struct device *dev, struct device_attribute *devattr, |
194 | char *buf) | |
195 | { | |
196 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
197 | struct lm63_data *data = lm63_update_device(dev); | |
198 | return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[attr->index])); | |
1da177e4 | 199 | } |
1da177e4 | 200 | |
bc51ae11 JD |
201 | static ssize_t set_fan(struct device *dev, struct device_attribute *dummy, |
202 | const char *buf, size_t count) | |
1da177e4 LT |
203 | { |
204 | struct i2c_client *client = to_i2c_client(dev); | |
205 | struct lm63_data *data = i2c_get_clientdata(client); | |
206 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
207 | ||
9a61bf63 | 208 | mutex_lock(&data->update_lock); |
bc51ae11 | 209 | data->fan[1] = FAN_TO_REG(val); |
1da177e4 | 210 | i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_LSB, |
bc51ae11 | 211 | data->fan[1] & 0xFF); |
1da177e4 | 212 | i2c_smbus_write_byte_data(client, LM63_REG_TACH_LIMIT_MSB, |
bc51ae11 | 213 | data->fan[1] >> 8); |
9a61bf63 | 214 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
215 | return count; |
216 | } | |
217 | ||
bc51ae11 JD |
218 | static ssize_t show_pwm1(struct device *dev, struct device_attribute *dummy, |
219 | char *buf) | |
1da177e4 LT |
220 | { |
221 | struct lm63_data *data = lm63_update_device(dev); | |
222 | return sprintf(buf, "%d\n", data->pwm1_value >= 2 * data->pwm1_freq ? | |
223 | 255 : (data->pwm1_value * 255 + data->pwm1_freq) / | |
224 | (2 * data->pwm1_freq)); | |
225 | } | |
226 | ||
bc51ae11 JD |
227 | static ssize_t set_pwm1(struct device *dev, struct device_attribute *dummy, |
228 | const char *buf, size_t count) | |
1da177e4 LT |
229 | { |
230 | struct i2c_client *client = to_i2c_client(dev); | |
231 | struct lm63_data *data = i2c_get_clientdata(client); | |
232 | unsigned long val; | |
233 | ||
234 | if (!(data->config_fan & 0x20)) /* register is read-only */ | |
235 | return -EPERM; | |
236 | ||
237 | val = simple_strtoul(buf, NULL, 10); | |
9a61bf63 | 238 | mutex_lock(&data->update_lock); |
1da177e4 LT |
239 | data->pwm1_value = val <= 0 ? 0 : |
240 | val >= 255 ? 2 * data->pwm1_freq : | |
241 | (val * data->pwm1_freq * 2 + 127) / 255; | |
242 | i2c_smbus_write_byte_data(client, LM63_REG_PWM_VALUE, data->pwm1_value); | |
9a61bf63 | 243 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
244 | return count; |
245 | } | |
246 | ||
bc51ae11 JD |
247 | static ssize_t show_pwm1_enable(struct device *dev, struct device_attribute *dummy, |
248 | char *buf) | |
1da177e4 LT |
249 | { |
250 | struct lm63_data *data = lm63_update_device(dev); | |
251 | return sprintf(buf, "%d\n", data->config_fan & 0x20 ? 1 : 2); | |
252 | } | |
253 | ||
bc51ae11 JD |
254 | static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr, |
255 | char *buf) | |
256 | { | |
257 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
258 | struct lm63_data *data = lm63_update_device(dev); | |
259 | return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[attr->index])); | |
1da177e4 | 260 | } |
bc51ae11 JD |
261 | |
262 | static ssize_t set_temp8(struct device *dev, struct device_attribute *dummy, | |
263 | const char *buf, size_t count) | |
264 | { | |
265 | struct i2c_client *client = to_i2c_client(dev); | |
266 | struct lm63_data *data = i2c_get_clientdata(client); | |
267 | long val = simple_strtol(buf, NULL, 10); | |
268 | ||
9a61bf63 | 269 | mutex_lock(&data->update_lock); |
bc51ae11 JD |
270 | data->temp8[1] = TEMP8_TO_REG(val); |
271 | i2c_smbus_write_byte_data(client, LM63_REG_LOCAL_HIGH, data->temp8[1]); | |
9a61bf63 | 272 | mutex_unlock(&data->update_lock); |
bc51ae11 | 273 | return count; |
1da177e4 | 274 | } |
bc51ae11 JD |
275 | |
276 | static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr, | |
277 | char *buf) | |
278 | { | |
279 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
280 | struct lm63_data *data = lm63_update_device(dev); | |
281 | return sprintf(buf, "%d\n", TEMP11_FROM_REG(data->temp11[attr->index])); | |
1da177e4 | 282 | } |
bc51ae11 JD |
283 | |
284 | static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr, | |
285 | const char *buf, size_t count) | |
286 | { | |
287 | static const u8 reg[4] = { | |
288 | LM63_REG_REMOTE_LOW_MSB, | |
289 | LM63_REG_REMOTE_LOW_LSB, | |
290 | LM63_REG_REMOTE_HIGH_MSB, | |
291 | LM63_REG_REMOTE_HIGH_LSB, | |
292 | }; | |
293 | ||
294 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
295 | struct i2c_client *client = to_i2c_client(dev); | |
296 | struct lm63_data *data = i2c_get_clientdata(client); | |
297 | long val = simple_strtol(buf, NULL, 10); | |
298 | int nr = attr->index; | |
299 | ||
9a61bf63 | 300 | mutex_lock(&data->update_lock); |
bc51ae11 JD |
301 | data->temp11[nr] = TEMP11_TO_REG(val); |
302 | i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2], | |
303 | data->temp11[nr] >> 8); | |
304 | i2c_smbus_write_byte_data(client, reg[(nr - 1) * 2 + 1], | |
305 | data->temp11[nr] & 0xff); | |
9a61bf63 | 306 | mutex_unlock(&data->update_lock); |
bc51ae11 | 307 | return count; |
1da177e4 | 308 | } |
1da177e4 LT |
309 | |
310 | /* Hysteresis register holds a relative value, while we want to present | |
311 | an absolute to user-space */ | |
bc51ae11 JD |
312 | static ssize_t show_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy, |
313 | char *buf) | |
1da177e4 LT |
314 | { |
315 | struct lm63_data *data = lm63_update_device(dev); | |
bc51ae11 | 316 | return sprintf(buf, "%d\n", TEMP8_FROM_REG(data->temp8[2]) |
1da177e4 LT |
317 | - TEMP8_FROM_REG(data->temp2_crit_hyst)); |
318 | } | |
319 | ||
320 | /* And now the other way around, user-space provides an absolute | |
321 | hysteresis value and we have to store a relative one */ | |
bc51ae11 JD |
322 | static ssize_t set_temp2_crit_hyst(struct device *dev, struct device_attribute *dummy, |
323 | const char *buf, size_t count) | |
1da177e4 LT |
324 | { |
325 | struct i2c_client *client = to_i2c_client(dev); | |
326 | struct lm63_data *data = i2c_get_clientdata(client); | |
327 | long val = simple_strtol(buf, NULL, 10); | |
328 | long hyst; | |
329 | ||
9a61bf63 | 330 | mutex_lock(&data->update_lock); |
bc51ae11 | 331 | hyst = TEMP8_FROM_REG(data->temp8[2]) - val; |
1da177e4 LT |
332 | i2c_smbus_write_byte_data(client, LM63_REG_REMOTE_TCRIT_HYST, |
333 | HYST_TO_REG(hyst)); | |
9a61bf63 | 334 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
335 | return count; |
336 | } | |
337 | ||
bc51ae11 JD |
338 | static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, |
339 | char *buf) | |
1da177e4 LT |
340 | { |
341 | struct lm63_data *data = lm63_update_device(dev); | |
342 | return sprintf(buf, "%u\n", data->alarms); | |
343 | } | |
344 | ||
2d45771e JD |
345 | static ssize_t show_alarm(struct device *dev, struct device_attribute *devattr, |
346 | char *buf) | |
347 | { | |
348 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
349 | struct lm63_data *data = lm63_update_device(dev); | |
350 | int bitnr = attr->index; | |
351 | ||
352 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
353 | } | |
354 | ||
bc51ae11 JD |
355 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); |
356 | static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan, | |
357 | set_fan, 1); | |
1da177e4 LT |
358 | |
359 | static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm1, set_pwm1); | |
360 | static DEVICE_ATTR(pwm1_enable, S_IRUGO, show_pwm1_enable, NULL); | |
361 | ||
bc51ae11 JD |
362 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp8, NULL, 0); |
363 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8, | |
364 | set_temp8, 1); | |
1da177e4 | 365 | |
bc51ae11 JD |
366 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp11, NULL, 0); |
367 | static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp11, | |
368 | set_temp11, 1); | |
369 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp11, | |
370 | set_temp11, 2); | |
371 | static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp8, NULL, 2); | |
1da177e4 LT |
372 | static DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_temp2_crit_hyst, |
373 | set_temp2_crit_hyst); | |
374 | ||
2d45771e JD |
375 | /* Individual alarm files */ |
376 | static SENSOR_DEVICE_ATTR(fan1_min_alarm, S_IRUGO, show_alarm, NULL, 0); | |
377 | static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1); | |
7817a39e | 378 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); |
2d45771e JD |
379 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); |
380 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); | |
381 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); | |
382 | /* Raw alarm file for compatibility */ | |
1da177e4 LT |
383 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
384 | ||
0e39e01c JD |
385 | static struct attribute *lm63_attributes[] = { |
386 | &dev_attr_pwm1.attr, | |
387 | &dev_attr_pwm1_enable.attr, | |
388 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
389 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
390 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
391 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
392 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
393 | &sensor_dev_attr_temp2_crit.dev_attr.attr, | |
394 | &dev_attr_temp2_crit_hyst.attr, | |
395 | ||
396 | &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, | |
7817a39e | 397 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
0e39e01c JD |
398 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, |
399 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
400 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
401 | &dev_attr_alarms.attr, | |
402 | NULL | |
403 | }; | |
404 | ||
405 | static const struct attribute_group lm63_group = { | |
406 | .attrs = lm63_attributes, | |
407 | }; | |
408 | ||
409 | static struct attribute *lm63_attributes_fan1[] = { | |
410 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
411 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
412 | ||
413 | &sensor_dev_attr_fan1_min_alarm.dev_attr.attr, | |
414 | NULL | |
415 | }; | |
416 | ||
417 | static const struct attribute_group lm63_group_fan1 = { | |
418 | .attrs = lm63_attributes_fan1, | |
419 | }; | |
420 | ||
1da177e4 LT |
421 | /* |
422 | * Real code | |
423 | */ | |
424 | ||
d5957be2 JD |
425 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
426 | static int lm63_detect(struct i2c_client *new_client, int kind, | |
427 | struct i2c_board_info *info) | |
1da177e4 | 428 | { |
d5957be2 | 429 | struct i2c_adapter *adapter = new_client->adapter; |
1da177e4 LT |
430 | |
431 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
d5957be2 | 432 | return -ENODEV; |
1da177e4 LT |
433 | |
434 | if (kind < 0) { /* must identify */ | |
435 | u8 man_id, chip_id, reg_config1, reg_config2; | |
436 | u8 reg_alert_status, reg_alert_mask; | |
437 | ||
438 | man_id = i2c_smbus_read_byte_data(new_client, | |
439 | LM63_REG_MAN_ID); | |
440 | chip_id = i2c_smbus_read_byte_data(new_client, | |
441 | LM63_REG_CHIP_ID); | |
442 | reg_config1 = i2c_smbus_read_byte_data(new_client, | |
443 | LM63_REG_CONFIG1); | |
444 | reg_config2 = i2c_smbus_read_byte_data(new_client, | |
445 | LM63_REG_CONFIG2); | |
446 | reg_alert_status = i2c_smbus_read_byte_data(new_client, | |
447 | LM63_REG_ALERT_STATUS); | |
448 | reg_alert_mask = i2c_smbus_read_byte_data(new_client, | |
449 | LM63_REG_ALERT_MASK); | |
450 | ||
451 | if (man_id == 0x01 /* National Semiconductor */ | |
452 | && chip_id == 0x41 /* LM63 */ | |
453 | && (reg_config1 & 0x18) == 0x00 | |
454 | && (reg_config2 & 0xF8) == 0x00 | |
455 | && (reg_alert_status & 0x20) == 0x00 | |
456 | && (reg_alert_mask & 0xA4) == 0xA4) { | |
457 | kind = lm63; | |
458 | } else { /* failed */ | |
459 | dev_dbg(&adapter->dev, "Unsupported chip " | |
460 | "(man_id=0x%02X, chip_id=0x%02X).\n", | |
461 | man_id, chip_id); | |
d5957be2 | 462 | return -ENODEV; |
1da177e4 LT |
463 | } |
464 | } | |
465 | ||
d5957be2 JD |
466 | strlcpy(info->type, "lm63", I2C_NAME_SIZE); |
467 | ||
468 | return 0; | |
469 | } | |
470 | ||
471 | static int lm63_probe(struct i2c_client *new_client, | |
472 | const struct i2c_device_id *id) | |
473 | { | |
474 | struct lm63_data *data; | |
475 | int err; | |
476 | ||
477 | data = kzalloc(sizeof(struct lm63_data), GFP_KERNEL); | |
478 | if (!data) { | |
479 | err = -ENOMEM; | |
480 | goto exit; | |
481 | } | |
482 | ||
483 | i2c_set_clientdata(new_client, data); | |
1da177e4 | 484 | data->valid = 0; |
9a61bf63 | 485 | mutex_init(&data->update_lock); |
1da177e4 | 486 | |
1da177e4 LT |
487 | /* Initialize the LM63 chip */ |
488 | lm63_init_client(new_client); | |
489 | ||
490 | /* Register sysfs hooks */ | |
0e39e01c JD |
491 | if ((err = sysfs_create_group(&new_client->dev.kobj, |
492 | &lm63_group))) | |
d5957be2 | 493 | goto exit_free; |
0e39e01c JD |
494 | if (data->config & 0x04) { /* tachometer enabled */ |
495 | if ((err = sysfs_create_group(&new_client->dev.kobj, | |
496 | &lm63_group_fan1))) | |
497 | goto exit_remove_files; | |
943b0830 MH |
498 | } |
499 | ||
1beeffe4 TJ |
500 | data->hwmon_dev = hwmon_device_register(&new_client->dev); |
501 | if (IS_ERR(data->hwmon_dev)) { | |
502 | err = PTR_ERR(data->hwmon_dev); | |
0e39e01c | 503 | goto exit_remove_files; |
1da177e4 | 504 | } |
1da177e4 LT |
505 | |
506 | return 0; | |
507 | ||
0e39e01c JD |
508 | exit_remove_files: |
509 | sysfs_remove_group(&new_client->dev.kobj, &lm63_group); | |
510 | sysfs_remove_group(&new_client->dev.kobj, &lm63_group_fan1); | |
1da177e4 LT |
511 | exit_free: |
512 | kfree(data); | |
513 | exit: | |
514 | return err; | |
515 | } | |
516 | ||
517 | /* Idealy we shouldn't have to initialize anything, since the BIOS | |
518 | should have taken care of everything */ | |
519 | static void lm63_init_client(struct i2c_client *client) | |
520 | { | |
521 | struct lm63_data *data = i2c_get_clientdata(client); | |
522 | ||
523 | data->config = i2c_smbus_read_byte_data(client, LM63_REG_CONFIG1); | |
524 | data->config_fan = i2c_smbus_read_byte_data(client, | |
525 | LM63_REG_CONFIG_FAN); | |
526 | ||
527 | /* Start converting if needed */ | |
528 | if (data->config & 0x40) { /* standby */ | |
898eb71c | 529 | dev_dbg(&client->dev, "Switching to operational mode\n"); |
1da177e4 LT |
530 | data->config &= 0xA7; |
531 | i2c_smbus_write_byte_data(client, LM63_REG_CONFIG1, | |
532 | data->config); | |
533 | } | |
534 | ||
535 | /* We may need pwm1_freq before ever updating the client data */ | |
536 | data->pwm1_freq = i2c_smbus_read_byte_data(client, LM63_REG_PWM_FREQ); | |
537 | if (data->pwm1_freq == 0) | |
538 | data->pwm1_freq = 1; | |
539 | ||
540 | /* Show some debug info about the LM63 configuration */ | |
541 | dev_dbg(&client->dev, "Alert/tach pin configured for %s\n", | |
542 | (data->config & 0x04) ? "tachometer input" : | |
543 | "alert output"); | |
544 | dev_dbg(&client->dev, "PWM clock %s kHz, output frequency %u Hz\n", | |
545 | (data->config_fan & 0x08) ? "1.4" : "360", | |
546 | ((data->config_fan & 0x08) ? 700 : 180000) / data->pwm1_freq); | |
547 | dev_dbg(&client->dev, "PWM output active %s, %s mode\n", | |
548 | (data->config_fan & 0x10) ? "low" : "high", | |
549 | (data->config_fan & 0x20) ? "manual" : "auto"); | |
550 | } | |
551 | ||
d5957be2 | 552 | static int lm63_remove(struct i2c_client *client) |
1da177e4 | 553 | { |
943b0830 | 554 | struct lm63_data *data = i2c_get_clientdata(client); |
1da177e4 | 555 | |
1beeffe4 | 556 | hwmon_device_unregister(data->hwmon_dev); |
0e39e01c JD |
557 | sysfs_remove_group(&client->dev.kobj, &lm63_group); |
558 | sysfs_remove_group(&client->dev.kobj, &lm63_group_fan1); | |
943b0830 | 559 | |
943b0830 | 560 | kfree(data); |
1da177e4 LT |
561 | return 0; |
562 | } | |
563 | ||
564 | static struct lm63_data *lm63_update_device(struct device *dev) | |
565 | { | |
566 | struct i2c_client *client = to_i2c_client(dev); | |
567 | struct lm63_data *data = i2c_get_clientdata(client); | |
568 | ||
9a61bf63 | 569 | mutex_lock(&data->update_lock); |
1da177e4 LT |
570 | |
571 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
572 | if (data->config & 0x04) { /* tachometer enabled */ | |
573 | /* order matters for fan1_input */ | |
bc51ae11 JD |
574 | data->fan[0] = i2c_smbus_read_byte_data(client, |
575 | LM63_REG_TACH_COUNT_LSB) & 0xFC; | |
576 | data->fan[0] |= i2c_smbus_read_byte_data(client, | |
577 | LM63_REG_TACH_COUNT_MSB) << 8; | |
578 | data->fan[1] = (i2c_smbus_read_byte_data(client, | |
579 | LM63_REG_TACH_LIMIT_LSB) & 0xFC) | |
580 | | (i2c_smbus_read_byte_data(client, | |
581 | LM63_REG_TACH_LIMIT_MSB) << 8); | |
1da177e4 LT |
582 | } |
583 | ||
584 | data->pwm1_freq = i2c_smbus_read_byte_data(client, | |
585 | LM63_REG_PWM_FREQ); | |
586 | if (data->pwm1_freq == 0) | |
587 | data->pwm1_freq = 1; | |
588 | data->pwm1_value = i2c_smbus_read_byte_data(client, | |
589 | LM63_REG_PWM_VALUE); | |
590 | ||
bc51ae11 JD |
591 | data->temp8[0] = i2c_smbus_read_byte_data(client, |
592 | LM63_REG_LOCAL_TEMP); | |
593 | data->temp8[1] = i2c_smbus_read_byte_data(client, | |
594 | LM63_REG_LOCAL_HIGH); | |
1da177e4 LT |
595 | |
596 | /* order matters for temp2_input */ | |
bc51ae11 JD |
597 | data->temp11[0] = i2c_smbus_read_byte_data(client, |
598 | LM63_REG_REMOTE_TEMP_MSB) << 8; | |
599 | data->temp11[0] |= i2c_smbus_read_byte_data(client, | |
600 | LM63_REG_REMOTE_TEMP_LSB); | |
601 | data->temp11[1] = (i2c_smbus_read_byte_data(client, | |
1da177e4 LT |
602 | LM63_REG_REMOTE_LOW_MSB) << 8) |
603 | | i2c_smbus_read_byte_data(client, | |
604 | LM63_REG_REMOTE_LOW_LSB); | |
bc51ae11 JD |
605 | data->temp11[2] = (i2c_smbus_read_byte_data(client, |
606 | LM63_REG_REMOTE_HIGH_MSB) << 8) | |
607 | | i2c_smbus_read_byte_data(client, | |
608 | LM63_REG_REMOTE_HIGH_LSB); | |
609 | data->temp8[2] = i2c_smbus_read_byte_data(client, | |
610 | LM63_REG_REMOTE_TCRIT); | |
1da177e4 LT |
611 | data->temp2_crit_hyst = i2c_smbus_read_byte_data(client, |
612 | LM63_REG_REMOTE_TCRIT_HYST); | |
613 | ||
614 | data->alarms = i2c_smbus_read_byte_data(client, | |
615 | LM63_REG_ALERT_STATUS) & 0x7F; | |
616 | ||
617 | data->last_updated = jiffies; | |
618 | data->valid = 1; | |
619 | } | |
620 | ||
9a61bf63 | 621 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
622 | |
623 | return data; | |
624 | } | |
625 | ||
626 | static int __init sensors_lm63_init(void) | |
627 | { | |
628 | return i2c_add_driver(&lm63_driver); | |
629 | } | |
630 | ||
631 | static void __exit sensors_lm63_exit(void) | |
632 | { | |
633 | i2c_del_driver(&lm63_driver); | |
634 | } | |
635 | ||
636 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); | |
637 | MODULE_DESCRIPTION("LM63 driver"); | |
638 | MODULE_LICENSE("GPL"); | |
639 | ||
640 | module_init(sensors_lm63_init); | |
641 | module_exit(sensors_lm63_exit); |