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1 | /* |
2 | * thmc50.c - Part of lm_sensors, Linux kernel modules for hardware |
3 | * monitoring |
4 | * Copyright (C) 2007 Krzysztof Helt <krzysztof.h1@wp.pl> |
5 | * Based on 2.4 driver by Frodo Looijaard <frodol@dds.nl> and |
6 | * Philip Edelbrock <phil@netroedge.com> |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License as published by |
10 | * the Free Software Foundation; either version 2 of the License, or |
11 | * (at your option) any later version. |
12 | * |
13 | * This program is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | * GNU General Public License for more details. |
17 | * |
18 | * You should have received a copy of the GNU General Public License |
19 | * along with this program; if not, write to the Free Software |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
21 | */ |
22 | |
23 | #include <linux/module.h> |
24 | #include <linux/init.h> |
25 | #include <linux/slab.h> |
26 | #include <linux/i2c.h> |
27 | #include <linux/hwmon.h> |
28 | #include <linux/hwmon-sysfs.h> |
29 | #include <linux/err.h> |
30 | #include <linux/mutex.h> |
31 | #include <linux/jiffies.h> |
32 | |
33 | MODULE_LICENSE("GPL"); |
34 | |
35 | /* Addresses to scan */ |
36 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; |
37 | |
38 | /* Insmod parameters */ |
39 | enum chips { thmc50, adm1022 }; |
40 | |
41 | static unsigned short adm1022_temp3[16]; |
42 | static unsigned int adm1022_temp3_num; |
43 | module_param_array(adm1022_temp3, ushort, &adm1022_temp3_num, 0); |
44 | MODULE_PARM_DESC(adm1022_temp3, |
45 | "List of adapter,address pairs to enable 3rd temperature (ADM1022 only)"); |
46 | |
47 | /* Many THMC50 constants specified below */ |
48 | |
49 | /* The THMC50 registers */ |
50 | #define THMC50_REG_CONF 0x40 |
51 | #define THMC50_REG_COMPANY_ID 0x3E |
52 | #define THMC50_REG_DIE_CODE 0x3F |
53 | #define THMC50_REG_ANALOG_OUT 0x19 |
54 | /* |
55 | * The mirror status register cannot be used as |
56 | * reading it does not clear alarms. |
57 | */ |
58 | #define THMC50_REG_INTR 0x41 |
59 | |
60 | static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 }; |
61 | static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C }; |
62 | static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B }; |
63 | static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 }; |
64 | static const u8 THMC50_REG_TEMP_DEFAULT[] = { 0x17, 0x18, 0x18 }; |
65 | |
66 | #define THMC50_REG_CONF_nFANOFF 0x20 |
67 | #define THMC50_REG_CONF_PROGRAMMED 0x08 |
68 | |
69 | /* Each client has this additional data */ |
70 | struct thmc50_data { |
71 | struct device *hwmon_dev; |
72 | |
73 | struct mutex update_lock; |
74 | enum chips type; |
75 | unsigned long last_updated; /* In jiffies */ |
76 | char has_temp3; /* !=0 if it is ADM1022 in temp3 mode */ |
77 | char valid; /* !=0 if following fields are valid */ |
78 | |
79 | /* Register values */ |
80 | s8 temp_input[3]; |
81 | s8 temp_max[3]; |
82 | s8 temp_min[3]; |
83 | s8 temp_critical[3]; |
84 | u8 analog_out; |
85 | u8 alarms; |
86 | }; |
87 | |
88 | static int thmc50_detect(struct i2c_client *client, |
89 | struct i2c_board_info *info); |
90 | static int thmc50_probe(struct i2c_client *client, |
91 | const struct i2c_device_id *id); |
92 | static int thmc50_remove(struct i2c_client *client); |
93 | static void thmc50_init_client(struct i2c_client *client); |
94 | static struct thmc50_data *thmc50_update_device(struct device *dev); |
95 | |
96 | static const struct i2c_device_id thmc50_id[] = { |
97 | { "adm1022", adm1022 }, |
98 | { "thmc50", thmc50 }, |
99 | { } |
100 | }; |
101 | MODULE_DEVICE_TABLE(i2c, thmc50_id); |
102 | |
103 | static struct i2c_driver thmc50_driver = { |
104 | .class = I2C_CLASS_HWMON, |
105 | .driver = { |
106 | .name = "thmc50", |
107 | }, |
108 | .probe = thmc50_probe, |
109 | .remove = thmc50_remove, |
110 | .id_table = thmc50_id, |
111 | .detect = thmc50_detect, |
112 | .address_list = normal_i2c, |
113 | }; |
114 | |
115 | static ssize_t show_analog_out(struct device *dev, |
116 | struct device_attribute *attr, char *buf) |
117 | { |
118 | struct thmc50_data *data = thmc50_update_device(dev); |
119 | return sprintf(buf, "%d\n", data->analog_out); |
120 | } |
121 | |
122 | static ssize_t set_analog_out(struct device *dev, |
123 | struct device_attribute *attr, |
124 | const char *buf, size_t count) |
125 | { |
126 | struct i2c_client *client = to_i2c_client(dev); |
127 | struct thmc50_data *data = i2c_get_clientdata(client); |
128 | int config; |
129 | unsigned long tmp; |
130 | int err; |
131 | |
132 | err = kstrtoul(buf, 10, &tmp); |
133 | if (err) |
134 | return err; |
135 | |
136 | mutex_lock(&data->update_lock); |
137 | data->analog_out = clamp_val(tmp, 0, 255); |
138 | i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT, |
139 | data->analog_out); |
140 | |
141 | config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF); |
142 | if (data->analog_out == 0) |
143 | config &= ~THMC50_REG_CONF_nFANOFF; |
144 | else |
145 | config |= THMC50_REG_CONF_nFANOFF; |
146 | i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config); |
147 | |
148 | mutex_unlock(&data->update_lock); |
149 | return count; |
150 | } |
151 | |
152 | /* There is only one PWM mode = DC */ |
153 | static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr, |
154 | char *buf) |
155 | { |
156 | return sprintf(buf, "0\n"); |
157 | } |
158 | |
159 | /* Temperatures */ |
160 | static ssize_t show_temp(struct device *dev, struct device_attribute *attr, |
161 | char *buf) |
162 | { |
163 | int nr = to_sensor_dev_attr(attr)->index; |
164 | struct thmc50_data *data = thmc50_update_device(dev); |
165 | return sprintf(buf, "%d\n", data->temp_input[nr] * 1000); |
166 | } |
167 | |
168 | static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, |
169 | char *buf) |
170 | { |
171 | int nr = to_sensor_dev_attr(attr)->index; |
172 | struct thmc50_data *data = thmc50_update_device(dev); |
173 | return sprintf(buf, "%d\n", data->temp_min[nr] * 1000); |
174 | } |
175 | |
176 | static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, |
177 | const char *buf, size_t count) |
178 | { |
179 | int nr = to_sensor_dev_attr(attr)->index; |
180 | struct i2c_client *client = to_i2c_client(dev); |
181 | struct thmc50_data *data = i2c_get_clientdata(client); |
182 | long val; |
183 | int err; |
184 | |
185 | err = kstrtol(buf, 10, &val); |
186 | if (err) |
187 | return err; |
188 | |
189 | mutex_lock(&data->update_lock); |
190 | data->temp_min[nr] = clamp_val(val / 1000, -128, 127); |
191 | i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr], |
192 | data->temp_min[nr]); |
193 | mutex_unlock(&data->update_lock); |
194 | return count; |
195 | } |
196 | |
197 | static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, |
198 | char *buf) |
199 | { |
200 | int nr = to_sensor_dev_attr(attr)->index; |
201 | struct thmc50_data *data = thmc50_update_device(dev); |
202 | return sprintf(buf, "%d\n", data->temp_max[nr] * 1000); |
203 | } |
204 | |
205 | static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, |
206 | const char *buf, size_t count) |
207 | { |
208 | int nr = to_sensor_dev_attr(attr)->index; |
209 | struct i2c_client *client = to_i2c_client(dev); |
210 | struct thmc50_data *data = i2c_get_clientdata(client); |
211 | long val; |
212 | int err; |
213 | |
214 | err = kstrtol(buf, 10, &val); |
215 | if (err) |
216 | return err; |
217 | |
218 | mutex_lock(&data->update_lock); |
219 | data->temp_max[nr] = clamp_val(val / 1000, -128, 127); |
220 | i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr], |
221 | data->temp_max[nr]); |
222 | mutex_unlock(&data->update_lock); |
223 | return count; |
224 | } |
225 | |
226 | static ssize_t show_temp_critical(struct device *dev, |
227 | struct device_attribute *attr, |
228 | char *buf) |
229 | { |
230 | int nr = to_sensor_dev_attr(attr)->index; |
231 | struct thmc50_data *data = thmc50_update_device(dev); |
232 | return sprintf(buf, "%d\n", data->temp_critical[nr] * 1000); |
233 | } |
234 | |
235 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, |
236 | char *buf) |
237 | { |
238 | int index = to_sensor_dev_attr(attr)->index; |
239 | struct thmc50_data *data = thmc50_update_device(dev); |
240 | |
241 | return sprintf(buf, "%u\n", (data->alarms >> index) & 1); |
242 | } |
243 | |
244 | #define temp_reg(offset) \ |
245 | static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp, \ |
246 | NULL, offset - 1); \ |
247 | static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ |
248 | show_temp_min, set_temp_min, offset - 1); \ |
249 | static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ |
250 | show_temp_max, set_temp_max, offset - 1); \ |
251 | static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO, \ |
252 | show_temp_critical, NULL, offset - 1); |
253 | |
254 | temp_reg(1); |
255 | temp_reg(2); |
256 | temp_reg(3); |
257 | |
258 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0); |
259 | static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); |
260 | static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1); |
261 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7); |
262 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2); |
263 | |
264 | static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_analog_out, |
265 | set_analog_out, 0); |
266 | static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0); |
267 | |
268 | static struct attribute *thmc50_attributes[] = { |
269 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
270 | &sensor_dev_attr_temp1_min.dev_attr.attr, |
271 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
272 | &sensor_dev_attr_temp1_crit.dev_attr.attr, |
273 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
274 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
275 | &sensor_dev_attr_temp2_min.dev_attr.attr, |
276 | &sensor_dev_attr_temp2_input.dev_attr.attr, |
277 | &sensor_dev_attr_temp2_crit.dev_attr.attr, |
278 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, |
279 | &sensor_dev_attr_temp2_fault.dev_attr.attr, |
280 | &sensor_dev_attr_pwm1.dev_attr.attr, |
281 | &sensor_dev_attr_pwm1_mode.dev_attr.attr, |
282 | NULL |
283 | }; |
284 | |
285 | static const struct attribute_group thmc50_group = { |
286 | .attrs = thmc50_attributes, |
287 | }; |
288 | |
289 | /* for ADM1022 3rd temperature mode */ |
290 | static struct attribute *temp3_attributes[] = { |
291 | &sensor_dev_attr_temp3_max.dev_attr.attr, |
292 | &sensor_dev_attr_temp3_min.dev_attr.attr, |
293 | &sensor_dev_attr_temp3_input.dev_attr.attr, |
294 | &sensor_dev_attr_temp3_crit.dev_attr.attr, |
295 | &sensor_dev_attr_temp3_alarm.dev_attr.attr, |
296 | &sensor_dev_attr_temp3_fault.dev_attr.attr, |
297 | NULL |
298 | }; |
299 | |
300 | static const struct attribute_group temp3_group = { |
301 | .attrs = temp3_attributes, |
302 | }; |
303 | |
304 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
305 | static int thmc50_detect(struct i2c_client *client, |
306 | struct i2c_board_info *info) |
307 | { |
308 | unsigned company; |
309 | unsigned revision; |
310 | unsigned config; |
311 | struct i2c_adapter *adapter = client->adapter; |
312 | const char *type_name; |
313 | |
314 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { |
315 | pr_debug("thmc50: detect failed, smbus byte data not supported!\n"); |
316 | return -ENODEV; |
317 | } |
318 | |
319 | pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n", |
320 | client->addr, i2c_adapter_id(client->adapter)); |
321 | |
322 | company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID); |
323 | revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE); |
324 | config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF); |
325 | if (revision < 0xc0 || (config & 0x10)) |
326 | return -ENODEV; |
327 | |
328 | if (company == 0x41) { |
329 | int id = i2c_adapter_id(client->adapter); |
330 | int i; |
331 | |
332 | type_name = "adm1022"; |
333 | for (i = 0; i + 1 < adm1022_temp3_num; i += 2) |
334 | if (adm1022_temp3[i] == id && |
335 | adm1022_temp3[i + 1] == client->addr) { |
336 | /* enable 2nd remote temp */ |
337 | config |= (1 << 7); |
338 | i2c_smbus_write_byte_data(client, |
339 | THMC50_REG_CONF, |
340 | config); |
341 | break; |
342 | } |
343 | } else if (company == 0x49) { |
344 | type_name = "thmc50"; |
345 | } else { |
346 | pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n"); |
347 | return -ENODEV; |
348 | } |
349 | |
350 | pr_debug("thmc50: Detected %s (version %x, revision %x)\n", |
351 | type_name, (revision >> 4) - 0xc, revision & 0xf); |
352 | |
353 | strlcpy(info->type, type_name, I2C_NAME_SIZE); |
354 | |
355 | return 0; |
356 | } |
357 | |
358 | static int thmc50_probe(struct i2c_client *client, |
359 | const struct i2c_device_id *id) |
360 | { |
361 | struct thmc50_data *data; |
362 | int err; |
363 | |
364 | data = devm_kzalloc(&client->dev, sizeof(struct thmc50_data), |
365 | GFP_KERNEL); |
366 | if (!data) |
367 | return -ENOMEM; |
368 | |
369 | i2c_set_clientdata(client, data); |
370 | data->type = id->driver_data; |
371 | mutex_init(&data->update_lock); |
372 | |
373 | thmc50_init_client(client); |
374 | |
375 | /* Register sysfs hooks */ |
376 | err = sysfs_create_group(&client->dev.kobj, &thmc50_group); |
377 | if (err) |
378 | return err; |
379 | |
380 | /* Register ADM1022 sysfs hooks */ |
381 | if (data->has_temp3) { |
382 | err = sysfs_create_group(&client->dev.kobj, &temp3_group); |
383 | if (err) |
384 | goto exit_remove_sysfs_thmc50; |
385 | } |
386 | |
387 | /* Register a new directory entry with module sensors */ |
388 | data->hwmon_dev = hwmon_device_register(&client->dev); |
389 | if (IS_ERR(data->hwmon_dev)) { |
390 | err = PTR_ERR(data->hwmon_dev); |
391 | goto exit_remove_sysfs; |
392 | } |
393 | |
394 | return 0; |
395 | |
396 | exit_remove_sysfs: |
397 | if (data->has_temp3) |
398 | sysfs_remove_group(&client->dev.kobj, &temp3_group); |
399 | exit_remove_sysfs_thmc50: |
400 | sysfs_remove_group(&client->dev.kobj, &thmc50_group); |
401 | return err; |
402 | } |
403 | |
404 | static int thmc50_remove(struct i2c_client *client) |
405 | { |
406 | struct thmc50_data *data = i2c_get_clientdata(client); |
407 | |
408 | hwmon_device_unregister(data->hwmon_dev); |
409 | sysfs_remove_group(&client->dev.kobj, &thmc50_group); |
410 | if (data->has_temp3) |
411 | sysfs_remove_group(&client->dev.kobj, &temp3_group); |
412 | |
413 | return 0; |
414 | } |
415 | |
416 | static void thmc50_init_client(struct i2c_client *client) |
417 | { |
418 | struct thmc50_data *data = i2c_get_clientdata(client); |
419 | int config; |
420 | |
421 | data->analog_out = i2c_smbus_read_byte_data(client, |
422 | THMC50_REG_ANALOG_OUT); |
423 | /* set up to at least 1 */ |
424 | if (data->analog_out == 0) { |
425 | data->analog_out = 1; |
426 | i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT, |
427 | data->analog_out); |
428 | } |
429 | config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF); |
430 | config |= 0x1; /* start the chip if it is in standby mode */ |
431 | if (data->type == adm1022 && (config & (1 << 7))) |
432 | data->has_temp3 = 1; |
433 | i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config); |
434 | } |
435 | |
436 | static struct thmc50_data *thmc50_update_device(struct device *dev) |
437 | { |
438 | struct i2c_client *client = to_i2c_client(dev); |
439 | struct thmc50_data *data = i2c_get_clientdata(client); |
440 | int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0); |
441 | |
442 | mutex_lock(&data->update_lock); |
443 | |
444 | if (time_after(jiffies, data->last_updated + timeout) |
445 | || !data->valid) { |
446 | |
447 | int temps = data->has_temp3 ? 3 : 2; |
448 | int i; |
449 | int prog = i2c_smbus_read_byte_data(client, THMC50_REG_CONF); |
450 | |
451 | prog &= THMC50_REG_CONF_PROGRAMMED; |
452 | |
453 | for (i = 0; i < temps; i++) { |
454 | data->temp_input[i] = i2c_smbus_read_byte_data(client, |
455 | THMC50_REG_TEMP[i]); |
456 | data->temp_max[i] = i2c_smbus_read_byte_data(client, |
457 | THMC50_REG_TEMP_MAX[i]); |
458 | data->temp_min[i] = i2c_smbus_read_byte_data(client, |
459 | THMC50_REG_TEMP_MIN[i]); |
460 | data->temp_critical[i] = |
461 | i2c_smbus_read_byte_data(client, |
462 | prog ? THMC50_REG_TEMP_CRITICAL[i] |
463 | : THMC50_REG_TEMP_DEFAULT[i]); |
464 | } |
465 | data->analog_out = |
466 | i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT); |
467 | data->alarms = |
468 | i2c_smbus_read_byte_data(client, THMC50_REG_INTR); |
469 | data->last_updated = jiffies; |
470 | data->valid = 1; |
471 | } |
472 | |
473 | mutex_unlock(&data->update_lock); |
474 | |
475 | return data; |
476 | } |
477 | |
478 | module_i2c_driver(thmc50_driver); |
479 | |
480 | MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>"); |
481 | MODULE_DESCRIPTION("THMC50 driver"); |
482 |
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