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9df7305b SG |
1 | /* |
2 | emc2103.c - Support for SMSC EMC2103 | |
3 | Copyright (c) 2010 SMSC | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/jiffies.h> | |
24 | #include <linux/i2c.h> | |
25 | #include <linux/hwmon.h> | |
26 | #include <linux/hwmon-sysfs.h> | |
27 | #include <linux/err.h> | |
28 | #include <linux/mutex.h> | |
29 | ||
30 | /* Addresses scanned */ | |
31 | static const unsigned short normal_i2c[] = { 0x2E, I2C_CLIENT_END }; | |
32 | ||
33 | static const u8 REG_TEMP[4] = { 0x00, 0x02, 0x04, 0x06 }; | |
34 | static const u8 REG_TEMP_MIN[4] = { 0x3c, 0x38, 0x39, 0x3a }; | |
35 | static const u8 REG_TEMP_MAX[4] = { 0x34, 0x30, 0x31, 0x32 }; | |
36 | ||
37 | #define REG_CONF1 0x20 | |
38 | #define REG_TEMP_MAX_ALARM 0x24 | |
39 | #define REG_TEMP_MIN_ALARM 0x25 | |
40 | #define REG_FAN_CONF1 0x42 | |
41 | #define REG_FAN_TARGET_LO 0x4c | |
42 | #define REG_FAN_TARGET_HI 0x4d | |
43 | #define REG_FAN_TACH_HI 0x4e | |
44 | #define REG_FAN_TACH_LO 0x4f | |
45 | #define REG_PRODUCT_ID 0xfd | |
46 | #define REG_MFG_ID 0xfe | |
47 | ||
48 | /* equation 4 from datasheet: rpm = (3932160 * multipler) / count */ | |
49 | #define FAN_RPM_FACTOR 3932160 | |
50 | ||
51 | /* 2103-2 and 2103-4's 3rd temperature sensor can be connected to two diodes | |
52 | * in anti-parallel mode, and in this configuration both can be read | |
53 | * independently (so we have 4 temperature inputs). The device can't | |
54 | * detect if it's connected in this mode, so we have to manually enable | |
55 | * it. Default is to leave the device in the state it's already in (-1). | |
56 | * This parameter allows APD mode to be optionally forced on or off */ | |
57 | static int apd = -1; | |
58 | module_param(apd, bool, 0); | |
59 | MODULE_PARM_DESC(init, "Set to zero to disable anti-parallel diode mode"); | |
60 | ||
61 | struct temperature { | |
62 | s8 degrees; | |
63 | u8 fraction; /* 0-7 multiples of 0.125 */ | |
64 | }; | |
65 | ||
66 | struct emc2103_data { | |
67 | struct device *hwmon_dev; | |
68 | struct mutex update_lock; | |
69 | bool valid; /* registers are valid */ | |
70 | bool fan_rpm_control; | |
71 | int temp_count; /* num of temp sensors */ | |
72 | unsigned long last_updated; /* in jiffies */ | |
73 | struct temperature temp[4]; /* internal + 3 external */ | |
74 | s8 temp_min[4]; /* no fractional part */ | |
75 | s8 temp_max[4]; /* no fractional part */ | |
76 | u8 temp_min_alarm; | |
77 | u8 temp_max_alarm; | |
78 | u8 fan_multiplier; | |
79 | u16 fan_tach; | |
80 | u16 fan_target; | |
81 | }; | |
82 | ||
83 | static int read_u8_from_i2c(struct i2c_client *client, u8 i2c_reg, u8 *output) | |
84 | { | |
85 | int status = i2c_smbus_read_byte_data(client, i2c_reg); | |
86 | if (status < 0) { | |
87 | dev_warn(&client->dev, "reg 0x%02x, err %d\n", | |
88 | i2c_reg, status); | |
89 | } else { | |
90 | *output = status; | |
91 | } | |
92 | return status; | |
93 | } | |
94 | ||
95 | static void read_temp_from_i2c(struct i2c_client *client, u8 i2c_reg, | |
96 | struct temperature *temp) | |
97 | { | |
98 | u8 degrees, fractional; | |
99 | ||
100 | if (read_u8_from_i2c(client, i2c_reg, °rees) < 0) | |
101 | return; | |
102 | ||
103 | if (read_u8_from_i2c(client, i2c_reg + 1, &fractional) < 0) | |
104 | return; | |
105 | ||
106 | temp->degrees = degrees; | |
107 | temp->fraction = (fractional & 0xe0) >> 5; | |
108 | } | |
109 | ||
110 | static void read_fan_from_i2c(struct i2c_client *client, u16 *output, | |
111 | u8 hi_addr, u8 lo_addr) | |
112 | { | |
113 | u8 high_byte, lo_byte; | |
114 | ||
115 | if (read_u8_from_i2c(client, hi_addr, &high_byte) < 0) | |
116 | return; | |
117 | ||
118 | if (read_u8_from_i2c(client, lo_addr, &lo_byte) < 0) | |
119 | return; | |
120 | ||
121 | *output = ((u16)high_byte << 5) | (lo_byte >> 3); | |
122 | } | |
123 | ||
124 | static void write_fan_target_to_i2c(struct i2c_client *client, u16 new_target) | |
125 | { | |
126 | u8 high_byte = (new_target & 0x1fe0) >> 5; | |
127 | u8 low_byte = (new_target & 0x001f) << 3; | |
128 | i2c_smbus_write_byte_data(client, REG_FAN_TARGET_LO, low_byte); | |
129 | i2c_smbus_write_byte_data(client, REG_FAN_TARGET_HI, high_byte); | |
130 | } | |
131 | ||
132 | static void read_fan_config_from_i2c(struct i2c_client *client) | |
133 | ||
134 | { | |
135 | struct emc2103_data *data = i2c_get_clientdata(client); | |
136 | u8 conf1; | |
137 | ||
138 | if (read_u8_from_i2c(client, REG_FAN_CONF1, &conf1) < 0) | |
139 | return; | |
140 | ||
141 | data->fan_multiplier = 1 << ((conf1 & 0x60) >> 5); | |
142 | data->fan_rpm_control = (conf1 & 0x80) != 0; | |
143 | } | |
144 | ||
145 | static struct emc2103_data *emc2103_update_device(struct device *dev) | |
146 | { | |
147 | struct i2c_client *client = to_i2c_client(dev); | |
148 | struct emc2103_data *data = i2c_get_clientdata(client); | |
149 | ||
150 | mutex_lock(&data->update_lock); | |
151 | ||
152 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
153 | || !data->valid) { | |
154 | int i; | |
155 | ||
156 | for (i = 0; i < data->temp_count; i++) { | |
157 | read_temp_from_i2c(client, REG_TEMP[i], &data->temp[i]); | |
158 | read_u8_from_i2c(client, REG_TEMP_MIN[i], | |
159 | &data->temp_min[i]); | |
160 | read_u8_from_i2c(client, REG_TEMP_MAX[i], | |
161 | &data->temp_max[i]); | |
162 | } | |
163 | ||
164 | read_u8_from_i2c(client, REG_TEMP_MIN_ALARM, | |
165 | &data->temp_min_alarm); | |
166 | read_u8_from_i2c(client, REG_TEMP_MAX_ALARM, | |
167 | &data->temp_max_alarm); | |
168 | ||
169 | read_fan_from_i2c(client, &data->fan_tach, | |
170 | REG_FAN_TACH_HI, REG_FAN_TACH_LO); | |
171 | read_fan_from_i2c(client, &data->fan_target, | |
172 | REG_FAN_TARGET_HI, REG_FAN_TARGET_LO); | |
173 | read_fan_config_from_i2c(client); | |
174 | ||
175 | data->last_updated = jiffies; | |
176 | data->valid = true; | |
177 | } | |
178 | ||
179 | mutex_unlock(&data->update_lock); | |
180 | ||
181 | return data; | |
182 | } | |
183 | ||
184 | static ssize_t | |
185 | show_temp(struct device *dev, struct device_attribute *da, char *buf) | |
186 | { | |
187 | int nr = to_sensor_dev_attr(da)->index; | |
188 | struct emc2103_data *data = emc2103_update_device(dev); | |
189 | int millidegrees = data->temp[nr].degrees * 1000 | |
190 | + data->temp[nr].fraction * 125; | |
191 | return sprintf(buf, "%d\n", millidegrees); | |
192 | } | |
193 | ||
194 | static ssize_t | |
195 | show_temp_min(struct device *dev, struct device_attribute *da, char *buf) | |
196 | { | |
197 | int nr = to_sensor_dev_attr(da)->index; | |
198 | struct emc2103_data *data = emc2103_update_device(dev); | |
199 | int millidegrees = data->temp_min[nr] * 1000; | |
200 | return sprintf(buf, "%d\n", millidegrees); | |
201 | } | |
202 | ||
203 | static ssize_t | |
204 | show_temp_max(struct device *dev, struct device_attribute *da, char *buf) | |
205 | { | |
206 | int nr = to_sensor_dev_attr(da)->index; | |
207 | struct emc2103_data *data = emc2103_update_device(dev); | |
208 | int millidegrees = data->temp_max[nr] * 1000; | |
209 | return sprintf(buf, "%d\n", millidegrees); | |
210 | } | |
211 | ||
212 | static ssize_t | |
213 | show_temp_fault(struct device *dev, struct device_attribute *da, char *buf) | |
214 | { | |
215 | int nr = to_sensor_dev_attr(da)->index; | |
216 | struct emc2103_data *data = emc2103_update_device(dev); | |
217 | bool fault = (data->temp[nr].degrees == -128); | |
218 | return sprintf(buf, "%d\n", fault ? 1 : 0); | |
219 | } | |
220 | ||
221 | static ssize_t | |
222 | show_temp_min_alarm(struct device *dev, struct device_attribute *da, char *buf) | |
223 | { | |
224 | int nr = to_sensor_dev_attr(da)->index; | |
225 | struct emc2103_data *data = emc2103_update_device(dev); | |
226 | bool alarm = data->temp_min_alarm & (1 << nr); | |
227 | return sprintf(buf, "%d\n", alarm ? 1 : 0); | |
228 | } | |
229 | ||
230 | static ssize_t | |
231 | show_temp_max_alarm(struct device *dev, struct device_attribute *da, char *buf) | |
232 | { | |
233 | int nr = to_sensor_dev_attr(da)->index; | |
234 | struct emc2103_data *data = emc2103_update_device(dev); | |
235 | bool alarm = data->temp_max_alarm & (1 << nr); | |
236 | return sprintf(buf, "%d\n", alarm ? 1 : 0); | |
237 | } | |
238 | ||
239 | static ssize_t set_temp_min(struct device *dev, struct device_attribute *da, | |
240 | const char *buf, size_t count) | |
241 | { | |
242 | int nr = to_sensor_dev_attr(da)->index; | |
243 | struct i2c_client *client = to_i2c_client(dev); | |
244 | struct emc2103_data *data = i2c_get_clientdata(client); | |
245 | long val; | |
246 | ||
247 | int result = strict_strtol(buf, 10, &val); | |
248 | if (result < 0) | |
249 | return -EINVAL; | |
250 | ||
251 | val = DIV_ROUND_CLOSEST(val, 1000); | |
252 | if ((val < -63) || (val > 127)) | |
253 | return -EINVAL; | |
254 | ||
255 | mutex_lock(&data->update_lock); | |
256 | data->temp_min[nr] = val; | |
257 | i2c_smbus_write_byte_data(client, REG_TEMP_MIN[nr], val); | |
258 | mutex_unlock(&data->update_lock); | |
259 | ||
260 | return count; | |
261 | } | |
262 | ||
263 | static ssize_t set_temp_max(struct device *dev, struct device_attribute *da, | |
264 | const char *buf, size_t count) | |
265 | { | |
266 | int nr = to_sensor_dev_attr(da)->index; | |
267 | struct i2c_client *client = to_i2c_client(dev); | |
268 | struct emc2103_data *data = i2c_get_clientdata(client); | |
269 | long val; | |
270 | ||
271 | int result = strict_strtol(buf, 10, &val); | |
272 | if (result < 0) | |
273 | return -EINVAL; | |
274 | ||
275 | val = DIV_ROUND_CLOSEST(val, 1000); | |
276 | if ((val < -63) || (val > 127)) | |
277 | return -EINVAL; | |
278 | ||
279 | mutex_lock(&data->update_lock); | |
280 | data->temp_max[nr] = val; | |
281 | i2c_smbus_write_byte_data(client, REG_TEMP_MAX[nr], val); | |
282 | mutex_unlock(&data->update_lock); | |
283 | ||
284 | return count; | |
285 | } | |
286 | ||
287 | static ssize_t | |
288 | show_fan(struct device *dev, struct device_attribute *da, char *buf) | |
289 | { | |
290 | struct emc2103_data *data = emc2103_update_device(dev); | |
291 | int rpm = 0; | |
292 | if (data->fan_tach != 0) | |
293 | rpm = (FAN_RPM_FACTOR * data->fan_multiplier) / data->fan_tach; | |
294 | return sprintf(buf, "%d\n", rpm); | |
295 | } | |
296 | ||
297 | static ssize_t | |
298 | show_fan_div(struct device *dev, struct device_attribute *da, char *buf) | |
299 | { | |
300 | struct emc2103_data *data = emc2103_update_device(dev); | |
301 | int fan_div = 8 / data->fan_multiplier; | |
302 | return sprintf(buf, "%d\n", fan_div); | |
303 | } | |
304 | ||
305 | /* Note: we also update the fan target here, because its value is | |
306 | determined in part by the fan clock divider. This follows the principle | |
307 | of least surprise; the user doesn't expect the fan target to change just | |
308 | because the divider changed. */ | |
309 | static ssize_t set_fan_div(struct device *dev, struct device_attribute *da, | |
310 | const char *buf, size_t count) | |
311 | { | |
312 | struct emc2103_data *data = emc2103_update_device(dev); | |
313 | struct i2c_client *client = to_i2c_client(dev); | |
314 | int new_range_bits, old_div = 8 / data->fan_multiplier; | |
315 | long new_div; | |
316 | ||
317 | int status = strict_strtol(buf, 10, &new_div); | |
318 | if (status < 0) | |
319 | return -EINVAL; | |
320 | ||
321 | if (new_div == old_div) /* No change */ | |
322 | return count; | |
323 | ||
324 | switch (new_div) { | |
325 | case 1: | |
326 | new_range_bits = 3; | |
327 | break; | |
328 | case 2: | |
329 | new_range_bits = 2; | |
330 | break; | |
331 | case 4: | |
332 | new_range_bits = 1; | |
333 | break; | |
334 | case 8: | |
335 | new_range_bits = 0; | |
336 | break; | |
337 | default: | |
338 | return -EINVAL; | |
339 | } | |
340 | ||
341 | mutex_lock(&data->update_lock); | |
342 | ||
343 | status = i2c_smbus_read_byte_data(client, REG_FAN_CONF1); | |
344 | if (status < 0) { | |
345 | dev_dbg(&client->dev, "reg 0x%02x, err %d\n", | |
346 | REG_FAN_CONF1, status); | |
347 | mutex_unlock(&data->update_lock); | |
348 | return -EIO; | |
349 | } | |
350 | status &= 0x9F; | |
351 | status |= (new_range_bits << 5); | |
352 | i2c_smbus_write_byte_data(client, REG_FAN_CONF1, status); | |
353 | ||
354 | data->fan_multiplier = 8 / new_div; | |
355 | ||
356 | /* update fan target if high byte is not disabled */ | |
357 | if ((data->fan_target & 0x1fe0) != 0x1fe0) { | |
358 | u16 new_target = (data->fan_target * old_div) / new_div; | |
359 | data->fan_target = min(new_target, (u16)0x1fff); | |
360 | write_fan_target_to_i2c(client, data->fan_target); | |
361 | } | |
362 | ||
363 | /* invalidate data to force re-read from hardware */ | |
364 | data->valid = false; | |
365 | ||
366 | mutex_unlock(&data->update_lock); | |
367 | return count; | |
368 | } | |
369 | ||
370 | static ssize_t | |
371 | show_fan_target(struct device *dev, struct device_attribute *da, char *buf) | |
372 | { | |
373 | struct emc2103_data *data = emc2103_update_device(dev); | |
374 | int rpm = 0; | |
375 | ||
376 | /* high byte of 0xff indicates disabled so return 0 */ | |
377 | if ((data->fan_target != 0) && ((data->fan_target & 0x1fe0) != 0x1fe0)) | |
378 | rpm = (FAN_RPM_FACTOR * data->fan_multiplier) | |
379 | / data->fan_target; | |
380 | ||
381 | return sprintf(buf, "%d\n", rpm); | |
382 | } | |
383 | ||
384 | static ssize_t set_fan_target(struct device *dev, struct device_attribute *da, | |
385 | const char *buf, size_t count) | |
386 | { | |
387 | struct emc2103_data *data = emc2103_update_device(dev); | |
388 | struct i2c_client *client = to_i2c_client(dev); | |
389 | long rpm_target; | |
390 | ||
391 | int result = strict_strtol(buf, 10, &rpm_target); | |
392 | if (result < 0) | |
393 | return -EINVAL; | |
394 | ||
395 | /* Datasheet states 16384 as maximum RPM target (table 3.2) */ | |
396 | if ((rpm_target < 0) || (rpm_target > 16384)) | |
397 | return -EINVAL; | |
398 | ||
399 | mutex_lock(&data->update_lock); | |
400 | ||
401 | if (rpm_target == 0) | |
402 | data->fan_target = 0x1fff; | |
403 | else | |
404 | data->fan_target = SENSORS_LIMIT( | |
405 | (FAN_RPM_FACTOR * data->fan_multiplier) / rpm_target, | |
406 | 0, 0x1fff); | |
407 | ||
408 | write_fan_target_to_i2c(client, data->fan_target); | |
409 | ||
410 | mutex_unlock(&data->update_lock); | |
411 | return count; | |
412 | } | |
413 | ||
414 | static ssize_t | |
415 | show_fan_fault(struct device *dev, struct device_attribute *da, char *buf) | |
416 | { | |
417 | struct emc2103_data *data = emc2103_update_device(dev); | |
418 | bool fault = ((data->fan_tach & 0x1fe0) == 0x1fe0); | |
419 | return sprintf(buf, "%d\n", fault ? 1 : 0); | |
420 | } | |
421 | ||
422 | static ssize_t | |
423 | show_pwm_enable(struct device *dev, struct device_attribute *da, char *buf) | |
424 | { | |
425 | struct emc2103_data *data = emc2103_update_device(dev); | |
426 | return sprintf(buf, "%d\n", data->fan_rpm_control ? 3 : 0); | |
427 | } | |
428 | ||
429 | static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *da, | |
430 | const char *buf, size_t count) | |
431 | { | |
432 | struct i2c_client *client = to_i2c_client(dev); | |
433 | struct emc2103_data *data = i2c_get_clientdata(client); | |
434 | long new_value; | |
435 | u8 conf_reg; | |
436 | ||
437 | int result = strict_strtol(buf, 10, &new_value); | |
438 | if (result < 0) | |
439 | return -EINVAL; | |
440 | ||
441 | mutex_lock(&data->update_lock); | |
442 | switch (new_value) { | |
443 | case 0: | |
444 | data->fan_rpm_control = false; | |
445 | break; | |
446 | case 3: | |
447 | data->fan_rpm_control = true; | |
448 | break; | |
449 | default: | |
450 | mutex_unlock(&data->update_lock); | |
451 | return -EINVAL; | |
452 | } | |
453 | ||
454 | read_u8_from_i2c(client, REG_FAN_CONF1, &conf_reg); | |
455 | ||
456 | if (data->fan_rpm_control) | |
457 | conf_reg |= 0x80; | |
458 | else | |
459 | conf_reg &= ~0x80; | |
460 | ||
461 | i2c_smbus_write_byte_data(client, REG_FAN_CONF1, conf_reg); | |
462 | ||
463 | mutex_unlock(&data->update_lock); | |
464 | return count; | |
465 | } | |
466 | ||
467 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); | |
468 | static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO | S_IWUSR, show_temp_min, | |
469 | set_temp_min, 0); | |
470 | static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp_max, | |
471 | set_temp_max, 0); | |
472 | static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0); | |
473 | static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_temp_min_alarm, | |
474 | NULL, 0); | |
475 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_temp_max_alarm, | |
476 | NULL, 0); | |
477 | ||
478 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); | |
479 | static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO | S_IWUSR, show_temp_min, | |
480 | set_temp_min, 1); | |
481 | static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR, show_temp_max, | |
482 | set_temp_max, 1); | |
483 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1); | |
484 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_temp_min_alarm, | |
485 | NULL, 1); | |
486 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_temp_max_alarm, | |
487 | NULL, 1); | |
488 | ||
489 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); | |
490 | static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO | S_IWUSR, show_temp_min, | |
491 | set_temp_min, 2); | |
492 | static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO | S_IWUSR, show_temp_max, | |
493 | set_temp_max, 2); | |
494 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2); | |
495 | static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_temp_min_alarm, | |
496 | NULL, 2); | |
497 | static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_temp_max_alarm, | |
498 | NULL, 2); | |
499 | ||
500 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); | |
501 | static SENSOR_DEVICE_ATTR(temp4_min, S_IRUGO | S_IWUSR, show_temp_min, | |
502 | set_temp_min, 3); | |
503 | static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO | S_IWUSR, show_temp_max, | |
504 | set_temp_max, 3); | |
505 | static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3); | |
506 | static SENSOR_DEVICE_ATTR(temp4_min_alarm, S_IRUGO, show_temp_min_alarm, | |
507 | NULL, 3); | |
508 | static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_temp_max_alarm, | |
509 | NULL, 3); | |
510 | ||
511 | static DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL); | |
512 | static DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, show_fan_div, set_fan_div); | |
513 | static DEVICE_ATTR(fan1_target, S_IRUGO | S_IWUSR, show_fan_target, | |
514 | set_fan_target); | |
515 | static DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL); | |
516 | ||
517 | static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, show_pwm_enable, | |
518 | set_pwm_enable); | |
519 | ||
520 | /* sensors present on all models */ | |
521 | static struct attribute *emc2103_attributes[] = { | |
522 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
523 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
524 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
525 | &sensor_dev_attr_temp1_fault.dev_attr.attr, | |
526 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, | |
527 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
528 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
529 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
530 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
531 | &sensor_dev_attr_temp2_fault.dev_attr.attr, | |
532 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, | |
533 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
534 | &dev_attr_fan1_input.attr, | |
535 | &dev_attr_fan1_div.attr, | |
536 | &dev_attr_fan1_target.attr, | |
537 | &dev_attr_fan1_fault.attr, | |
538 | &dev_attr_pwm1_enable.attr, | |
539 | NULL | |
540 | }; | |
541 | ||
542 | /* extra temperature sensors only present on 2103-2 and 2103-4 */ | |
543 | static struct attribute *emc2103_attributes_temp3[] = { | |
544 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
545 | &sensor_dev_attr_temp3_min.dev_attr.attr, | |
546 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
547 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
548 | &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, | |
549 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, | |
550 | NULL | |
551 | }; | |
552 | ||
553 | /* extra temperature sensors only present on 2103-2 and 2103-4 in APD mode */ | |
554 | static struct attribute *emc2103_attributes_temp4[] = { | |
555 | &sensor_dev_attr_temp4_input.dev_attr.attr, | |
556 | &sensor_dev_attr_temp4_min.dev_attr.attr, | |
557 | &sensor_dev_attr_temp4_max.dev_attr.attr, | |
558 | &sensor_dev_attr_temp4_fault.dev_attr.attr, | |
559 | &sensor_dev_attr_temp4_min_alarm.dev_attr.attr, | |
560 | &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, | |
561 | NULL | |
562 | }; | |
563 | ||
564 | static const struct attribute_group emc2103_group = { | |
565 | .attrs = emc2103_attributes, | |
566 | }; | |
567 | ||
568 | static const struct attribute_group emc2103_temp3_group = { | |
569 | .attrs = emc2103_attributes_temp3, | |
570 | }; | |
571 | ||
572 | static const struct attribute_group emc2103_temp4_group = { | |
573 | .attrs = emc2103_attributes_temp4, | |
574 | }; | |
575 | ||
576 | static int | |
577 | emc2103_probe(struct i2c_client *client, const struct i2c_device_id *id) | |
578 | { | |
579 | struct emc2103_data *data; | |
580 | int status; | |
581 | ||
582 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
583 | return -EIO; | |
584 | ||
585 | data = kzalloc(sizeof(struct emc2103_data), GFP_KERNEL); | |
586 | if (!data) | |
587 | return -ENOMEM; | |
588 | ||
589 | i2c_set_clientdata(client, data); | |
590 | mutex_init(&data->update_lock); | |
591 | ||
592 | /* 2103-2 and 2103-4 have 3 external diodes, 2103-1 has 1 */ | |
593 | status = i2c_smbus_read_byte_data(client, REG_PRODUCT_ID); | |
594 | if (status == 0x24) { | |
595 | /* 2103-1 only has 1 external diode */ | |
596 | data->temp_count = 2; | |
597 | } else { | |
598 | /* 2103-2 and 2103-4 have 3 or 4 external diodes */ | |
599 | status = i2c_smbus_read_byte_data(client, REG_CONF1); | |
600 | if (status < 0) { | |
601 | dev_dbg(&client->dev, "reg 0x%02x, err %d\n", REG_CONF1, | |
602 | status); | |
603 | goto exit_free; | |
604 | } | |
605 | ||
606 | /* detect current state of hardware */ | |
607 | data->temp_count = (status & 0x01) ? 4 : 3; | |
608 | ||
609 | /* force APD state if module parameter is set */ | |
610 | if (apd == 0) { | |
611 | /* force APD mode off */ | |
612 | data->temp_count = 3; | |
613 | status &= ~(0x01); | |
614 | i2c_smbus_write_byte_data(client, REG_CONF1, status); | |
615 | } else if (apd == 1) { | |
616 | /* force APD mode on */ | |
617 | data->temp_count = 4; | |
618 | status |= 0x01; | |
619 | i2c_smbus_write_byte_data(client, REG_CONF1, status); | |
620 | } | |
621 | } | |
622 | ||
623 | /* Register sysfs hooks */ | |
624 | status = sysfs_create_group(&client->dev.kobj, &emc2103_group); | |
625 | if (status) | |
626 | goto exit_free; | |
627 | ||
628 | if (data->temp_count >= 3) { | |
629 | status = sysfs_create_group(&client->dev.kobj, | |
630 | &emc2103_temp3_group); | |
631 | if (status) | |
632 | goto exit_remove; | |
633 | } | |
634 | ||
635 | if (data->temp_count == 4) { | |
636 | status = sysfs_create_group(&client->dev.kobj, | |
637 | &emc2103_temp4_group); | |
638 | if (status) | |
639 | goto exit_remove_temp3; | |
640 | } | |
641 | ||
642 | data->hwmon_dev = hwmon_device_register(&client->dev); | |
643 | if (IS_ERR(data->hwmon_dev)) { | |
644 | status = PTR_ERR(data->hwmon_dev); | |
645 | goto exit_remove_temp4; | |
646 | } | |
647 | ||
648 | dev_info(&client->dev, "%s: sensor '%s'\n", | |
649 | dev_name(data->hwmon_dev), client->name); | |
650 | ||
651 | return 0; | |
652 | ||
653 | exit_remove_temp4: | |
654 | if (data->temp_count == 4) | |
655 | sysfs_remove_group(&client->dev.kobj, &emc2103_temp4_group); | |
656 | exit_remove_temp3: | |
657 | if (data->temp_count >= 3) | |
658 | sysfs_remove_group(&client->dev.kobj, &emc2103_temp3_group); | |
659 | exit_remove: | |
660 | sysfs_remove_group(&client->dev.kobj, &emc2103_group); | |
661 | exit_free: | |
662 | kfree(data); | |
663 | return status; | |
664 | } | |
665 | ||
666 | static int emc2103_remove(struct i2c_client *client) | |
667 | { | |
668 | struct emc2103_data *data = i2c_get_clientdata(client); | |
669 | ||
670 | hwmon_device_unregister(data->hwmon_dev); | |
671 | ||
672 | if (data->temp_count == 4) | |
673 | sysfs_remove_group(&client->dev.kobj, &emc2103_temp4_group); | |
674 | ||
675 | if (data->temp_count >= 3) | |
676 | sysfs_remove_group(&client->dev.kobj, &emc2103_temp3_group); | |
677 | ||
678 | sysfs_remove_group(&client->dev.kobj, &emc2103_group); | |
679 | ||
680 | kfree(data); | |
681 | return 0; | |
682 | } | |
683 | ||
684 | static const struct i2c_device_id emc2103_ids[] = { | |
685 | { "emc2103", 0, }, | |
686 | { /* LIST END */ } | |
687 | }; | |
688 | MODULE_DEVICE_TABLE(i2c, emc2103_ids); | |
689 | ||
690 | /* Return 0 if detection is successful, -ENODEV otherwise */ | |
691 | static int | |
692 | emc2103_detect(struct i2c_client *new_client, struct i2c_board_info *info) | |
693 | { | |
694 | struct i2c_adapter *adapter = new_client->adapter; | |
695 | int manufacturer, product; | |
696 | ||
697 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
698 | return -ENODEV; | |
699 | ||
700 | manufacturer = i2c_smbus_read_byte_data(new_client, REG_MFG_ID); | |
701 | if (manufacturer != 0x5D) | |
702 | return -ENODEV; | |
703 | ||
704 | product = i2c_smbus_read_byte_data(new_client, REG_PRODUCT_ID); | |
705 | if ((product != 0x24) && (product != 0x26)) | |
706 | return -ENODEV; | |
707 | ||
708 | strlcpy(info->type, "emc2103", I2C_NAME_SIZE); | |
709 | ||
710 | return 0; | |
711 | } | |
712 | ||
713 | static struct i2c_driver emc2103_driver = { | |
714 | .class = I2C_CLASS_HWMON, | |
715 | .driver = { | |
716 | .name = "emc2103", | |
717 | }, | |
718 | .probe = emc2103_probe, | |
719 | .remove = emc2103_remove, | |
720 | .id_table = emc2103_ids, | |
721 | .detect = emc2103_detect, | |
722 | .address_list = normal_i2c, | |
723 | }; | |
724 | ||
725 | static int __init sensors_emc2103_init(void) | |
726 | { | |
727 | return i2c_add_driver(&emc2103_driver); | |
728 | } | |
729 | ||
730 | static void __exit sensors_emc2103_exit(void) | |
731 | { | |
732 | i2c_del_driver(&emc2103_driver); | |
733 | } | |
734 | ||
735 | MODULE_AUTHOR("Steve Glendinning <steve.glendinning@smsc.com>"); | |
736 | MODULE_DESCRIPTION("SMSC EMC2103 hwmon driver"); | |
737 | MODULE_LICENSE("GPL"); | |
738 | ||
739 | module_init(sensors_emc2103_init); | |
740 | module_exit(sensors_emc2103_exit); |