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