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9df7305b | 1 | /* |
bf0f3a04 GR |
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 | */ | |
9df7305b SG |
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 | ||
bf0f3a04 GR |
51 | /* |
52 | * 2103-2 and 2103-4's 3rd temperature sensor can be connected to two diodes | |
9df7305b SG |
53 | * in anti-parallel mode, and in this configuration both can be read |
54 | * independently (so we have 4 temperature inputs). The device can't | |
55 | * detect if it's connected in this mode, so we have to manually enable | |
56 | * it. Default is to leave the device in the state it's already in (-1). | |
bf0f3a04 GR |
57 | * This parameter allows APD mode to be optionally forced on or off |
58 | */ | |
9df7305b | 59 | static int apd = -1; |
69116f27 | 60 | module_param(apd, bint, 0); |
9df7305b SG |
61 | MODULE_PARM_DESC(init, "Set to zero to disable anti-parallel diode mode"); |
62 | ||
63 | struct temperature { | |
64 | s8 degrees; | |
65 | u8 fraction; /* 0-7 multiples of 0.125 */ | |
66 | }; | |
67 | ||
68 | struct emc2103_data { | |
69 | struct device *hwmon_dev; | |
70 | struct mutex update_lock; | |
71 | bool valid; /* registers are valid */ | |
72 | bool fan_rpm_control; | |
73 | int temp_count; /* num of temp sensors */ | |
74 | unsigned long last_updated; /* in jiffies */ | |
75 | struct temperature temp[4]; /* internal + 3 external */ | |
76 | s8 temp_min[4]; /* no fractional part */ | |
77 | s8 temp_max[4]; /* no fractional part */ | |
78 | u8 temp_min_alarm; | |
79 | u8 temp_max_alarm; | |
80 | u8 fan_multiplier; | |
81 | u16 fan_tach; | |
82 | u16 fan_target; | |
83 | }; | |
84 | ||
85 | static int read_u8_from_i2c(struct i2c_client *client, u8 i2c_reg, u8 *output) | |
86 | { | |
87 | int status = i2c_smbus_read_byte_data(client, i2c_reg); | |
88 | if (status < 0) { | |
89 | dev_warn(&client->dev, "reg 0x%02x, err %d\n", | |
90 | i2c_reg, status); | |
91 | } else { | |
92 | *output = status; | |
93 | } | |
94 | return status; | |
95 | } | |
96 | ||
97 | static void read_temp_from_i2c(struct i2c_client *client, u8 i2c_reg, | |
98 | struct temperature *temp) | |
99 | { | |
100 | u8 degrees, fractional; | |
101 | ||
102 | if (read_u8_from_i2c(client, i2c_reg, °rees) < 0) | |
103 | return; | |
104 | ||
105 | if (read_u8_from_i2c(client, i2c_reg + 1, &fractional) < 0) | |
106 | return; | |
107 | ||
108 | temp->degrees = degrees; | |
109 | temp->fraction = (fractional & 0xe0) >> 5; | |
110 | } | |
111 | ||
112 | static void read_fan_from_i2c(struct i2c_client *client, u16 *output, | |
113 | u8 hi_addr, u8 lo_addr) | |
114 | { | |
115 | u8 high_byte, lo_byte; | |
116 | ||
117 | if (read_u8_from_i2c(client, hi_addr, &high_byte) < 0) | |
118 | return; | |
119 | ||
120 | if (read_u8_from_i2c(client, lo_addr, &lo_byte) < 0) | |
121 | return; | |
122 | ||
123 | *output = ((u16)high_byte << 5) | (lo_byte >> 3); | |
124 | } | |
125 | ||
126 | static void write_fan_target_to_i2c(struct i2c_client *client, u16 new_target) | |
127 | { | |
128 | u8 high_byte = (new_target & 0x1fe0) >> 5; | |
129 | u8 low_byte = (new_target & 0x001f) << 3; | |
130 | i2c_smbus_write_byte_data(client, REG_FAN_TARGET_LO, low_byte); | |
131 | i2c_smbus_write_byte_data(client, REG_FAN_TARGET_HI, high_byte); | |
132 | } | |
133 | ||
134 | static void read_fan_config_from_i2c(struct i2c_client *client) | |
135 | ||
136 | { | |
137 | struct emc2103_data *data = i2c_get_clientdata(client); | |
138 | u8 conf1; | |
139 | ||
140 | if (read_u8_from_i2c(client, REG_FAN_CONF1, &conf1) < 0) | |
141 | return; | |
142 | ||
143 | data->fan_multiplier = 1 << ((conf1 & 0x60) >> 5); | |
144 | data->fan_rpm_control = (conf1 & 0x80) != 0; | |
145 | } | |
146 | ||
147 | static struct emc2103_data *emc2103_update_device(struct device *dev) | |
148 | { | |
149 | struct i2c_client *client = to_i2c_client(dev); | |
150 | struct emc2103_data *data = i2c_get_clientdata(client); | |
151 | ||
152 | mutex_lock(&data->update_lock); | |
153 | ||
154 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
155 | || !data->valid) { | |
156 | int i; | |
157 | ||
158 | for (i = 0; i < data->temp_count; i++) { | |
159 | read_temp_from_i2c(client, REG_TEMP[i], &data->temp[i]); | |
160 | read_u8_from_i2c(client, REG_TEMP_MIN[i], | |
161 | &data->temp_min[i]); | |
162 | read_u8_from_i2c(client, REG_TEMP_MAX[i], | |
163 | &data->temp_max[i]); | |
164 | } | |
165 | ||
166 | read_u8_from_i2c(client, REG_TEMP_MIN_ALARM, | |
167 | &data->temp_min_alarm); | |
168 | read_u8_from_i2c(client, REG_TEMP_MAX_ALARM, | |
169 | &data->temp_max_alarm); | |
170 | ||
171 | read_fan_from_i2c(client, &data->fan_tach, | |
172 | REG_FAN_TACH_HI, REG_FAN_TACH_LO); | |
173 | read_fan_from_i2c(client, &data->fan_target, | |
174 | REG_FAN_TARGET_HI, REG_FAN_TARGET_LO); | |
175 | read_fan_config_from_i2c(client); | |
176 | ||
177 | data->last_updated = jiffies; | |
178 | data->valid = true; | |
179 | } | |
180 | ||
181 | mutex_unlock(&data->update_lock); | |
182 | ||
183 | return data; | |
184 | } | |
185 | ||
186 | static ssize_t | |
187 | show_temp(struct device *dev, struct device_attribute *da, char *buf) | |
188 | { | |
189 | int nr = to_sensor_dev_attr(da)->index; | |
190 | struct emc2103_data *data = emc2103_update_device(dev); | |
191 | int millidegrees = data->temp[nr].degrees * 1000 | |
192 | + data->temp[nr].fraction * 125; | |
193 | return sprintf(buf, "%d\n", millidegrees); | |
194 | } | |
195 | ||
196 | static ssize_t | |
197 | show_temp_min(struct device *dev, struct device_attribute *da, char *buf) | |
198 | { | |
199 | int nr = to_sensor_dev_attr(da)->index; | |
200 | struct emc2103_data *data = emc2103_update_device(dev); | |
201 | int millidegrees = data->temp_min[nr] * 1000; | |
202 | return sprintf(buf, "%d\n", millidegrees); | |
203 | } | |
204 | ||
205 | static ssize_t | |
206 | show_temp_max(struct device *dev, struct device_attribute *da, char *buf) | |
207 | { | |
208 | int nr = to_sensor_dev_attr(da)->index; | |
209 | struct emc2103_data *data = emc2103_update_device(dev); | |
210 | int millidegrees = data->temp_max[nr] * 1000; | |
211 | return sprintf(buf, "%d\n", millidegrees); | |
212 | } | |
213 | ||
214 | static ssize_t | |
215 | show_temp_fault(struct device *dev, struct device_attribute *da, char *buf) | |
216 | { | |
217 | int nr = to_sensor_dev_attr(da)->index; | |
218 | struct emc2103_data *data = emc2103_update_device(dev); | |
219 | bool fault = (data->temp[nr].degrees == -128); | |
220 | return sprintf(buf, "%d\n", fault ? 1 : 0); | |
221 | } | |
222 | ||
223 | static ssize_t | |
224 | show_temp_min_alarm(struct device *dev, struct device_attribute *da, char *buf) | |
225 | { | |
226 | int nr = to_sensor_dev_attr(da)->index; | |
227 | struct emc2103_data *data = emc2103_update_device(dev); | |
228 | bool alarm = data->temp_min_alarm & (1 << nr); | |
229 | return sprintf(buf, "%d\n", alarm ? 1 : 0); | |
230 | } | |
231 | ||
232 | static ssize_t | |
233 | show_temp_max_alarm(struct device *dev, struct device_attribute *da, char *buf) | |
234 | { | |
235 | int nr = to_sensor_dev_attr(da)->index; | |
236 | struct emc2103_data *data = emc2103_update_device(dev); | |
237 | bool alarm = data->temp_max_alarm & (1 << nr); | |
238 | return sprintf(buf, "%d\n", alarm ? 1 : 0); | |
239 | } | |
240 | ||
241 | static ssize_t set_temp_min(struct device *dev, struct device_attribute *da, | |
242 | const char *buf, size_t count) | |
243 | { | |
244 | int nr = to_sensor_dev_attr(da)->index; | |
245 | struct i2c_client *client = to_i2c_client(dev); | |
246 | struct emc2103_data *data = i2c_get_clientdata(client); | |
247 | long val; | |
248 | ||
179c4fdb | 249 | int result = kstrtol(buf, 10, &val); |
9df7305b | 250 | if (result < 0) |
1a3abbd0 | 251 | return result; |
9df7305b | 252 | |
f6c2dd20 | 253 | val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), -63, 127); |
9df7305b SG |
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 | ||
179c4fdb | 271 | int result = kstrtol(buf, 10, &val); |
9df7305b | 272 | if (result < 0) |
1a3abbd0 | 273 | return result; |
9df7305b | 274 | |
f6c2dd20 | 275 | val = clamp_val(DIV_ROUND_CLOSEST(val, 1000), -63, 127); |
9df7305b SG |
276 | |
277 | mutex_lock(&data->update_lock); | |
278 | data->temp_max[nr] = val; | |
279 | i2c_smbus_write_byte_data(client, REG_TEMP_MAX[nr], val); | |
280 | mutex_unlock(&data->update_lock); | |
281 | ||
282 | return count; | |
283 | } | |
284 | ||
285 | static ssize_t | |
286 | show_fan(struct device *dev, struct device_attribute *da, char *buf) | |
287 | { | |
288 | struct emc2103_data *data = emc2103_update_device(dev); | |
289 | int rpm = 0; | |
290 | if (data->fan_tach != 0) | |
291 | rpm = (FAN_RPM_FACTOR * data->fan_multiplier) / data->fan_tach; | |
292 | return sprintf(buf, "%d\n", rpm); | |
293 | } | |
294 | ||
295 | static ssize_t | |
296 | show_fan_div(struct device *dev, struct device_attribute *da, char *buf) | |
297 | { | |
298 | struct emc2103_data *data = emc2103_update_device(dev); | |
299 | int fan_div = 8 / data->fan_multiplier; | |
300 | return sprintf(buf, "%d\n", fan_div); | |
301 | } | |
302 | ||
bf0f3a04 GR |
303 | /* |
304 | * Note: we also update the fan target here, because its value is | |
305 | * determined in part by the fan clock divider. This follows the principle | |
306 | * of least surprise; the user doesn't expect the fan target to change just | |
307 | * because the divider changed. | |
308 | */ | |
9df7305b SG |
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 | ||
179c4fdb | 317 | int status = kstrtol(buf, 10, &new_div); |
9df7305b | 318 | if (status < 0) |
1a3abbd0 | 319 | return status; |
9df7305b SG |
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); | |
9bf3babf | 348 | return status; |
9df7305b SG |
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); | |
f6c2dd20 | 389 | unsigned long rpm_target; |
9df7305b | 390 | |
f6c2dd20 | 391 | int result = kstrtoul(buf, 10, &rpm_target); |
9df7305b | 392 | if (result < 0) |
1a3abbd0 | 393 | return result; |
9df7305b SG |
394 | |
395 | /* Datasheet states 16384 as maximum RPM target (table 3.2) */ | |
f6c2dd20 | 396 | rpm_target = clamp_val(rpm_target, 0, 16384); |
9df7305b SG |
397 | |
398 | mutex_lock(&data->update_lock); | |
399 | ||
400 | if (rpm_target == 0) | |
401 | data->fan_target = 0x1fff; | |
402 | else | |
2a844c14 | 403 | data->fan_target = clamp_val( |
9df7305b SG |
404 | (FAN_RPM_FACTOR * data->fan_multiplier) / rpm_target, |
405 | 0, 0x1fff); | |
406 | ||
407 | write_fan_target_to_i2c(client, data->fan_target); | |
408 | ||
409 | mutex_unlock(&data->update_lock); | |
410 | return count; | |
411 | } | |
412 | ||
413 | static ssize_t | |
414 | show_fan_fault(struct device *dev, struct device_attribute *da, char *buf) | |
415 | { | |
416 | struct emc2103_data *data = emc2103_update_device(dev); | |
417 | bool fault = ((data->fan_tach & 0x1fe0) == 0x1fe0); | |
418 | return sprintf(buf, "%d\n", fault ? 1 : 0); | |
419 | } | |
420 | ||
421 | static ssize_t | |
422 | show_pwm_enable(struct device *dev, struct device_attribute *da, char *buf) | |
423 | { | |
424 | struct emc2103_data *data = emc2103_update_device(dev); | |
425 | return sprintf(buf, "%d\n", data->fan_rpm_control ? 3 : 0); | |
426 | } | |
427 | ||
428 | static ssize_t set_pwm_enable(struct device *dev, struct device_attribute *da, | |
429 | const char *buf, size_t count) | |
430 | { | |
431 | struct i2c_client *client = to_i2c_client(dev); | |
432 | struct emc2103_data *data = i2c_get_clientdata(client); | |
433 | long new_value; | |
434 | u8 conf_reg; | |
435 | ||
179c4fdb | 436 | int result = kstrtol(buf, 10, &new_value); |
9df7305b | 437 | if (result < 0) |
1a3abbd0 | 438 | return result; |
9df7305b SG |
439 | |
440 | mutex_lock(&data->update_lock); | |
441 | switch (new_value) { | |
442 | case 0: | |
443 | data->fan_rpm_control = false; | |
444 | break; | |
445 | case 3: | |
446 | data->fan_rpm_control = true; | |
447 | break; | |
448 | default: | |
2355375e GR |
449 | count = -EINVAL; |
450 | goto err; | |
9df7305b SG |
451 | } |
452 | ||
2355375e GR |
453 | result = read_u8_from_i2c(client, REG_FAN_CONF1, &conf_reg); |
454 | if (result) { | |
455 | count = result; | |
456 | goto err; | |
457 | } | |
9df7305b SG |
458 | |
459 | if (data->fan_rpm_control) | |
460 | conf_reg |= 0x80; | |
461 | else | |
462 | conf_reg &= ~0x80; | |
463 | ||
464 | i2c_smbus_write_byte_data(client, REG_FAN_CONF1, conf_reg); | |
2355375e | 465 | err: |
9df7305b SG |
466 | mutex_unlock(&data->update_lock); |
467 | return count; | |
468 | } | |
469 | ||
470 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); | |
471 | static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO | S_IWUSR, show_temp_min, | |
472 | set_temp_min, 0); | |
473 | static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, show_temp_max, | |
474 | set_temp_max, 0); | |
475 | static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0); | |
476 | static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_temp_min_alarm, | |
477 | NULL, 0); | |
478 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_temp_max_alarm, | |
479 | NULL, 0); | |
480 | ||
481 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); | |
482 | static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO | S_IWUSR, show_temp_min, | |
483 | set_temp_min, 1); | |
484 | static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR, show_temp_max, | |
485 | set_temp_max, 1); | |
486 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1); | |
487 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_temp_min_alarm, | |
488 | NULL, 1); | |
489 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_temp_max_alarm, | |
490 | NULL, 1); | |
491 | ||
492 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); | |
493 | static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO | S_IWUSR, show_temp_min, | |
494 | set_temp_min, 2); | |
495 | static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO | S_IWUSR, show_temp_max, | |
496 | set_temp_max, 2); | |
497 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2); | |
498 | static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_temp_min_alarm, | |
499 | NULL, 2); | |
500 | static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_temp_max_alarm, | |
501 | NULL, 2); | |
502 | ||
503 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); | |
504 | static SENSOR_DEVICE_ATTR(temp4_min, S_IRUGO | S_IWUSR, show_temp_min, | |
505 | set_temp_min, 3); | |
506 | static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO | S_IWUSR, show_temp_max, | |
507 | set_temp_max, 3); | |
508 | static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3); | |
509 | static SENSOR_DEVICE_ATTR(temp4_min_alarm, S_IRUGO, show_temp_min_alarm, | |
510 | NULL, 3); | |
511 | static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_temp_max_alarm, | |
512 | NULL, 3); | |
513 | ||
514 | static DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL); | |
515 | static DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, show_fan_div, set_fan_div); | |
516 | static DEVICE_ATTR(fan1_target, S_IRUGO | S_IWUSR, show_fan_target, | |
517 | set_fan_target); | |
518 | static DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL); | |
519 | ||
520 | static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, show_pwm_enable, | |
521 | set_pwm_enable); | |
522 | ||
523 | /* sensors present on all models */ | |
524 | static struct attribute *emc2103_attributes[] = { | |
525 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
526 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
527 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
528 | &sensor_dev_attr_temp1_fault.dev_attr.attr, | |
529 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, | |
530 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
531 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
532 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
533 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
534 | &sensor_dev_attr_temp2_fault.dev_attr.attr, | |
535 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, | |
536 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
537 | &dev_attr_fan1_input.attr, | |
538 | &dev_attr_fan1_div.attr, | |
539 | &dev_attr_fan1_target.attr, | |
540 | &dev_attr_fan1_fault.attr, | |
541 | &dev_attr_pwm1_enable.attr, | |
542 | NULL | |
543 | }; | |
544 | ||
545 | /* extra temperature sensors only present on 2103-2 and 2103-4 */ | |
546 | static struct attribute *emc2103_attributes_temp3[] = { | |
547 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
548 | &sensor_dev_attr_temp3_min.dev_attr.attr, | |
549 | &sensor_dev_attr_temp3_max.dev_attr.attr, | |
550 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
551 | &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, | |
552 | &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, | |
553 | NULL | |
554 | }; | |
555 | ||
556 | /* extra temperature sensors only present on 2103-2 and 2103-4 in APD mode */ | |
557 | static struct attribute *emc2103_attributes_temp4[] = { | |
558 | &sensor_dev_attr_temp4_input.dev_attr.attr, | |
559 | &sensor_dev_attr_temp4_min.dev_attr.attr, | |
560 | &sensor_dev_attr_temp4_max.dev_attr.attr, | |
561 | &sensor_dev_attr_temp4_fault.dev_attr.attr, | |
562 | &sensor_dev_attr_temp4_min_alarm.dev_attr.attr, | |
563 | &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, | |
564 | NULL | |
565 | }; | |
566 | ||
567 | static const struct attribute_group emc2103_group = { | |
568 | .attrs = emc2103_attributes, | |
569 | }; | |
570 | ||
571 | static const struct attribute_group emc2103_temp3_group = { | |
572 | .attrs = emc2103_attributes_temp3, | |
573 | }; | |
574 | ||
575 | static const struct attribute_group emc2103_temp4_group = { | |
576 | .attrs = emc2103_attributes_temp4, | |
577 | }; | |
578 | ||
579 | static int | |
580 | emc2103_probe(struct i2c_client *client, const struct i2c_device_id *id) | |
581 | { | |
582 | struct emc2103_data *data; | |
583 | int status; | |
584 | ||
585 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
586 | return -EIO; | |
587 | ||
59da32d8 GR |
588 | data = devm_kzalloc(&client->dev, sizeof(struct emc2103_data), |
589 | GFP_KERNEL); | |
9df7305b SG |
590 | if (!data) |
591 | return -ENOMEM; | |
592 | ||
593 | i2c_set_clientdata(client, data); | |
594 | mutex_init(&data->update_lock); | |
595 | ||
596 | /* 2103-2 and 2103-4 have 3 external diodes, 2103-1 has 1 */ | |
597 | status = i2c_smbus_read_byte_data(client, REG_PRODUCT_ID); | |
598 | if (status == 0x24) { | |
599 | /* 2103-1 only has 1 external diode */ | |
600 | data->temp_count = 2; | |
601 | } else { | |
602 | /* 2103-2 and 2103-4 have 3 or 4 external diodes */ | |
603 | status = i2c_smbus_read_byte_data(client, REG_CONF1); | |
604 | if (status < 0) { | |
605 | dev_dbg(&client->dev, "reg 0x%02x, err %d\n", REG_CONF1, | |
606 | status); | |
59da32d8 | 607 | return status; |
9df7305b SG |
608 | } |
609 | ||
610 | /* detect current state of hardware */ | |
611 | data->temp_count = (status & 0x01) ? 4 : 3; | |
612 | ||
613 | /* force APD state if module parameter is set */ | |
614 | if (apd == 0) { | |
615 | /* force APD mode off */ | |
616 | data->temp_count = 3; | |
617 | status &= ~(0x01); | |
618 | i2c_smbus_write_byte_data(client, REG_CONF1, status); | |
619 | } else if (apd == 1) { | |
620 | /* force APD mode on */ | |
621 | data->temp_count = 4; | |
622 | status |= 0x01; | |
623 | i2c_smbus_write_byte_data(client, REG_CONF1, status); | |
624 | } | |
625 | } | |
626 | ||
627 | /* Register sysfs hooks */ | |
628 | status = sysfs_create_group(&client->dev.kobj, &emc2103_group); | |
629 | if (status) | |
59da32d8 | 630 | return status; |
9df7305b SG |
631 | |
632 | if (data->temp_count >= 3) { | |
633 | status = sysfs_create_group(&client->dev.kobj, | |
634 | &emc2103_temp3_group); | |
635 | if (status) | |
636 | goto exit_remove; | |
637 | } | |
638 | ||
639 | if (data->temp_count == 4) { | |
640 | status = sysfs_create_group(&client->dev.kobj, | |
641 | &emc2103_temp4_group); | |
642 | if (status) | |
643 | goto exit_remove_temp3; | |
644 | } | |
645 | ||
646 | data->hwmon_dev = hwmon_device_register(&client->dev); | |
647 | if (IS_ERR(data->hwmon_dev)) { | |
648 | status = PTR_ERR(data->hwmon_dev); | |
649 | goto exit_remove_temp4; | |
650 | } | |
651 | ||
652 | dev_info(&client->dev, "%s: sensor '%s'\n", | |
653 | dev_name(data->hwmon_dev), client->name); | |
654 | ||
655 | return 0; | |
656 | ||
657 | exit_remove_temp4: | |
658 | if (data->temp_count == 4) | |
659 | sysfs_remove_group(&client->dev.kobj, &emc2103_temp4_group); | |
660 | exit_remove_temp3: | |
661 | if (data->temp_count >= 3) | |
662 | sysfs_remove_group(&client->dev.kobj, &emc2103_temp3_group); | |
663 | exit_remove: | |
664 | sysfs_remove_group(&client->dev.kobj, &emc2103_group); | |
9df7305b SG |
665 | return status; |
666 | } | |
667 | ||
668 | static int emc2103_remove(struct i2c_client *client) | |
669 | { | |
670 | struct emc2103_data *data = i2c_get_clientdata(client); | |
671 | ||
672 | hwmon_device_unregister(data->hwmon_dev); | |
673 | ||
674 | if (data->temp_count == 4) | |
675 | sysfs_remove_group(&client->dev.kobj, &emc2103_temp4_group); | |
676 | ||
677 | if (data->temp_count >= 3) | |
678 | sysfs_remove_group(&client->dev.kobj, &emc2103_temp3_group); | |
679 | ||
680 | sysfs_remove_group(&client->dev.kobj, &emc2103_group); | |
681 | ||
9df7305b SG |
682 | return 0; |
683 | } | |
684 | ||
685 | static const struct i2c_device_id emc2103_ids[] = { | |
686 | { "emc2103", 0, }, | |
687 | { /* LIST END */ } | |
688 | }; | |
689 | MODULE_DEVICE_TABLE(i2c, emc2103_ids); | |
690 | ||
691 | /* Return 0 if detection is successful, -ENODEV otherwise */ | |
692 | static int | |
693 | emc2103_detect(struct i2c_client *new_client, struct i2c_board_info *info) | |
694 | { | |
695 | struct i2c_adapter *adapter = new_client->adapter; | |
696 | int manufacturer, product; | |
697 | ||
698 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
699 | return -ENODEV; | |
700 | ||
701 | manufacturer = i2c_smbus_read_byte_data(new_client, REG_MFG_ID); | |
702 | if (manufacturer != 0x5D) | |
703 | return -ENODEV; | |
704 | ||
705 | product = i2c_smbus_read_byte_data(new_client, REG_PRODUCT_ID); | |
706 | if ((product != 0x24) && (product != 0x26)) | |
707 | return -ENODEV; | |
708 | ||
709 | strlcpy(info->type, "emc2103", I2C_NAME_SIZE); | |
710 | ||
711 | return 0; | |
712 | } | |
713 | ||
714 | static struct i2c_driver emc2103_driver = { | |
715 | .class = I2C_CLASS_HWMON, | |
716 | .driver = { | |
717 | .name = "emc2103", | |
718 | }, | |
719 | .probe = emc2103_probe, | |
720 | .remove = emc2103_remove, | |
721 | .id_table = emc2103_ids, | |
722 | .detect = emc2103_detect, | |
723 | .address_list = normal_i2c, | |
724 | }; | |
725 | ||
f0967eea | 726 | module_i2c_driver(emc2103_driver); |
9df7305b | 727 | |
90b24cfb | 728 | MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); |
9df7305b SG |
729 | MODULE_DESCRIPTION("SMSC EMC2103 hwmon driver"); |
730 | MODULE_LICENSE("GPL"); |