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add77c64 KH |
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 | ||
32 | MODULE_LICENSE("GPL"); | |
33 | ||
34 | /* Addresses to scan */ | |
25e9c86d | 35 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; |
add77c64 KH |
36 | |
37 | /* Insmod parameters */ | |
38 | I2C_CLIENT_INSMOD_2(thmc50, adm1022); | |
39 | I2C_CLIENT_MODULE_PARM(adm1022_temp3, "List of adapter,address pairs " | |
40 | "to enable 3rd temperature (ADM1022 only)"); | |
41 | ||
42 | /* Many THMC50 constants specified below */ | |
43 | ||
44 | /* The THMC50 registers */ | |
45 | #define THMC50_REG_CONF 0x40 | |
46 | #define THMC50_REG_COMPANY_ID 0x3E | |
47 | #define THMC50_REG_DIE_CODE 0x3F | |
48 | #define THMC50_REG_ANALOG_OUT 0x19 | |
dcf3b5fb | 49 | /* |
bba891c2 KH |
50 | * The mirror status register cannot be used as |
51 | * reading it does not clear alarms. | |
dcf3b5fb | 52 | */ |
bba891c2 | 53 | #define THMC50_REG_INTR 0x41 |
add77c64 | 54 | |
5910a9b2 TK |
55 | static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 }; |
56 | static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C }; | |
57 | static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B }; | |
add77c64 KH |
58 | |
59 | #define THMC50_REG_CONF_nFANOFF 0x20 | |
60 | ||
61 | /* Each client has this additional data */ | |
62 | struct thmc50_data { | |
1beeffe4 | 63 | struct device *hwmon_dev; |
add77c64 KH |
64 | |
65 | struct mutex update_lock; | |
66 | enum chips type; | |
67 | unsigned long last_updated; /* In jiffies */ | |
68 | char has_temp3; /* !=0 if it is ADM1022 in temp3 mode */ | |
69 | char valid; /* !=0 if following fields are valid */ | |
70 | ||
71 | /* Register values */ | |
72 | s8 temp_input[3]; | |
73 | s8 temp_max[3]; | |
74 | s8 temp_min[3]; | |
75 | u8 analog_out; | |
dcf3b5fb | 76 | u8 alarms; |
add77c64 KH |
77 | }; |
78 | ||
ccf37488 JD |
79 | static int thmc50_detect(struct i2c_client *client, int kind, |
80 | struct i2c_board_info *info); | |
81 | static int thmc50_probe(struct i2c_client *client, | |
82 | const struct i2c_device_id *id); | |
83 | static int thmc50_remove(struct i2c_client *client); | |
add77c64 KH |
84 | static void thmc50_init_client(struct i2c_client *client); |
85 | static struct thmc50_data *thmc50_update_device(struct device *dev); | |
86 | ||
ccf37488 JD |
87 | static const struct i2c_device_id thmc50_id[] = { |
88 | { "adm1022", adm1022 }, | |
89 | { "thmc50", thmc50 }, | |
90 | { } | |
91 | }; | |
92 | MODULE_DEVICE_TABLE(i2c, thmc50_id); | |
93 | ||
add77c64 | 94 | static struct i2c_driver thmc50_driver = { |
ccf37488 | 95 | .class = I2C_CLASS_HWMON, |
add77c64 KH |
96 | .driver = { |
97 | .name = "thmc50", | |
98 | }, | |
ccf37488 JD |
99 | .probe = thmc50_probe, |
100 | .remove = thmc50_remove, | |
101 | .id_table = thmc50_id, | |
102 | .detect = thmc50_detect, | |
103 | .address_data = &addr_data, | |
add77c64 KH |
104 | }; |
105 | ||
106 | static ssize_t show_analog_out(struct device *dev, | |
107 | struct device_attribute *attr, char *buf) | |
108 | { | |
109 | struct thmc50_data *data = thmc50_update_device(dev); | |
110 | return sprintf(buf, "%d\n", data->analog_out); | |
111 | } | |
112 | ||
113 | static ssize_t set_analog_out(struct device *dev, | |
114 | struct device_attribute *attr, | |
115 | const char *buf, size_t count) | |
116 | { | |
117 | struct i2c_client *client = to_i2c_client(dev); | |
118 | struct thmc50_data *data = i2c_get_clientdata(client); | |
119 | int tmp = simple_strtoul(buf, NULL, 10); | |
120 | int config; | |
121 | ||
122 | mutex_lock(&data->update_lock); | |
123 | data->analog_out = SENSORS_LIMIT(tmp, 0, 255); | |
124 | i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT, | |
125 | data->analog_out); | |
126 | ||
127 | config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF); | |
128 | if (data->analog_out == 0) | |
129 | config &= ~THMC50_REG_CONF_nFANOFF; | |
130 | else | |
131 | config |= THMC50_REG_CONF_nFANOFF; | |
132 | i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config); | |
133 | ||
134 | mutex_unlock(&data->update_lock); | |
135 | return count; | |
136 | } | |
137 | ||
138 | /* There is only one PWM mode = DC */ | |
139 | static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr, | |
140 | char *buf) | |
141 | { | |
142 | return sprintf(buf, "0\n"); | |
143 | } | |
144 | ||
145 | /* Temperatures */ | |
146 | static ssize_t show_temp(struct device *dev, struct device_attribute *attr, | |
147 | char *buf) | |
148 | { | |
149 | int nr = to_sensor_dev_attr(attr)->index; | |
150 | struct thmc50_data *data = thmc50_update_device(dev); | |
151 | return sprintf(buf, "%d\n", data->temp_input[nr] * 1000); | |
152 | } | |
153 | ||
154 | static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, | |
155 | char *buf) | |
156 | { | |
157 | int nr = to_sensor_dev_attr(attr)->index; | |
158 | struct thmc50_data *data = thmc50_update_device(dev); | |
159 | return sprintf(buf, "%d\n", data->temp_min[nr] * 1000); | |
160 | } | |
161 | ||
162 | static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, | |
163 | const char *buf, size_t count) | |
164 | { | |
165 | int nr = to_sensor_dev_attr(attr)->index; | |
166 | struct i2c_client *client = to_i2c_client(dev); | |
167 | struct thmc50_data *data = i2c_get_clientdata(client); | |
168 | int val = simple_strtol(buf, NULL, 10); | |
169 | ||
170 | mutex_lock(&data->update_lock); | |
171 | data->temp_min[nr] = SENSORS_LIMIT(val / 1000, -128, 127); | |
172 | i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr], | |
173 | data->temp_min[nr]); | |
174 | mutex_unlock(&data->update_lock); | |
175 | return count; | |
176 | } | |
177 | ||
178 | static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, | |
179 | char *buf) | |
180 | { | |
181 | int nr = to_sensor_dev_attr(attr)->index; | |
182 | struct thmc50_data *data = thmc50_update_device(dev); | |
183 | return sprintf(buf, "%d\n", data->temp_max[nr] * 1000); | |
184 | } | |
185 | ||
186 | static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, | |
187 | const char *buf, size_t count) | |
188 | { | |
189 | int nr = to_sensor_dev_attr(attr)->index; | |
190 | struct i2c_client *client = to_i2c_client(dev); | |
191 | struct thmc50_data *data = i2c_get_clientdata(client); | |
192 | int val = simple_strtol(buf, NULL, 10); | |
193 | ||
194 | mutex_lock(&data->update_lock); | |
195 | data->temp_max[nr] = SENSORS_LIMIT(val / 1000, -128, 127); | |
196 | i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr], | |
197 | data->temp_max[nr]); | |
198 | mutex_unlock(&data->update_lock); | |
199 | return count; | |
200 | } | |
201 | ||
dcf3b5fb KH |
202 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, |
203 | char *buf) | |
204 | { | |
205 | int index = to_sensor_dev_attr(attr)->index; | |
206 | struct thmc50_data *data = thmc50_update_device(dev); | |
207 | ||
208 | return sprintf(buf, "%u\n", (data->alarms >> index) & 1); | |
209 | } | |
210 | ||
add77c64 KH |
211 | #define temp_reg(offset) \ |
212 | static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp, \ | |
213 | NULL, offset - 1); \ | |
214 | static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ | |
215 | show_temp_min, set_temp_min, offset - 1); \ | |
216 | static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ | |
217 | show_temp_max, set_temp_max, offset - 1); | |
218 | ||
219 | temp_reg(1); | |
220 | temp_reg(2); | |
221 | temp_reg(3); | |
222 | ||
dcf3b5fb KH |
223 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0); |
224 | static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); | |
225 | static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1); | |
226 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7); | |
227 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2); | |
228 | ||
add77c64 KH |
229 | static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_analog_out, |
230 | set_analog_out, 0); | |
231 | static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0); | |
232 | ||
233 | static struct attribute *thmc50_attributes[] = { | |
234 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
235 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
236 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
dcf3b5fb | 237 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
add77c64 KH |
238 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
239 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
240 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
dcf3b5fb KH |
241 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, |
242 | &sensor_dev_attr_temp2_fault.dev_attr.attr, | |
add77c64 KH |
243 | &sensor_dev_attr_pwm1.dev_attr.attr, |
244 | &sensor_dev_attr_pwm1_mode.dev_attr.attr, | |
245 | NULL | |
246 | }; | |
247 | ||
248 | static const struct attribute_group thmc50_group = { | |
249 | .attrs = thmc50_attributes, | |
250 | }; | |
251 | ||
252 | /* for ADM1022 3rd temperature mode */ | |
894c00cf | 253 | static struct attribute *temp3_attributes[] = { |
add77c64 KH |
254 | &sensor_dev_attr_temp3_max.dev_attr.attr, |
255 | &sensor_dev_attr_temp3_min.dev_attr.attr, | |
256 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
dcf3b5fb KH |
257 | &sensor_dev_attr_temp3_alarm.dev_attr.attr, |
258 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
add77c64 KH |
259 | NULL |
260 | }; | |
261 | ||
894c00cf JD |
262 | static const struct attribute_group temp3_group = { |
263 | .attrs = temp3_attributes, | |
add77c64 KH |
264 | }; |
265 | ||
ccf37488 JD |
266 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
267 | static int thmc50_detect(struct i2c_client *client, int kind, | |
268 | struct i2c_board_info *info) | |
add77c64 KH |
269 | { |
270 | unsigned company; | |
271 | unsigned revision; | |
272 | unsigned config; | |
ccf37488 | 273 | struct i2c_adapter *adapter = client->adapter; |
add77c64 | 274 | int err = 0; |
cc28a610 | 275 | const char *type_name; |
add77c64 KH |
276 | |
277 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { | |
278 | pr_debug("thmc50: detect failed, " | |
279 | "smbus byte data not supported!\n"); | |
ccf37488 | 280 | return -ENODEV; |
add77c64 KH |
281 | } |
282 | ||
add77c64 KH |
283 | pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n", |
284 | client->addr, i2c_adapter_id(client->adapter)); | |
285 | ||
286 | /* Now, we do the remaining detection. */ | |
287 | company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID); | |
288 | revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE); | |
289 | config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF); | |
290 | ||
291 | if (kind == 0) | |
292 | kind = thmc50; | |
293 | else if (kind < 0) { | |
294 | err = -ENODEV; | |
295 | if (revision >= 0xc0 && ((config & 0x10) == 0)) { | |
296 | if (company == 0x49) { | |
297 | kind = thmc50; | |
298 | err = 0; | |
299 | } else if (company == 0x41) { | |
300 | kind = adm1022; | |
301 | err = 0; | |
302 | } | |
303 | } | |
304 | } | |
305 | if (err == -ENODEV) { | |
306 | pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n"); | |
ccf37488 | 307 | return err; |
add77c64 | 308 | } |
add77c64 | 309 | |
cc28a610 | 310 | if (kind == adm1022) { |
add77c64 KH |
311 | int id = i2c_adapter_id(client->adapter); |
312 | int i; | |
313 | ||
314 | type_name = "adm1022"; | |
add77c64 KH |
315 | for (i = 0; i + 1 < adm1022_temp3_num; i += 2) |
316 | if (adm1022_temp3[i] == id && | |
ccf37488 | 317 | adm1022_temp3[i + 1] == client->addr) { |
add77c64 | 318 | /* enable 2nd remote temp */ |
ccf37488 JD |
319 | config |= (1 << 7); |
320 | i2c_smbus_write_byte_data(client, | |
321 | THMC50_REG_CONF, | |
322 | config); | |
add77c64 KH |
323 | break; |
324 | } | |
cc28a610 JD |
325 | } else { |
326 | type_name = "thmc50"; | |
add77c64 | 327 | } |
cc28a610 JD |
328 | pr_debug("thmc50: Detected %s (version %x, revision %x)\n", |
329 | type_name, (revision >> 4) - 0xc, revision & 0xf); | |
add77c64 | 330 | |
ccf37488 | 331 | strlcpy(info->type, type_name, I2C_NAME_SIZE); |
add77c64 | 332 | |
ccf37488 JD |
333 | return 0; |
334 | } | |
335 | ||
336 | static int thmc50_probe(struct i2c_client *client, | |
337 | const struct i2c_device_id *id) | |
338 | { | |
339 | struct thmc50_data *data; | |
340 | int err; | |
341 | ||
342 | data = kzalloc(sizeof(struct thmc50_data), GFP_KERNEL); | |
343 | if (!data) { | |
344 | pr_debug("thmc50: detect failed, kzalloc failed!\n"); | |
345 | err = -ENOMEM; | |
346 | goto exit; | |
347 | } | |
348 | ||
349 | i2c_set_clientdata(client, data); | |
350 | data->type = id->driver_data; | |
351 | mutex_init(&data->update_lock); | |
add77c64 KH |
352 | |
353 | thmc50_init_client(client); | |
354 | ||
355 | /* Register sysfs hooks */ | |
356 | if ((err = sysfs_create_group(&client->dev.kobj, &thmc50_group))) | |
ccf37488 | 357 | goto exit_free; |
add77c64 KH |
358 | |
359 | /* Register ADM1022 sysfs hooks */ | |
894c00cf | 360 | if (data->has_temp3) |
add77c64 | 361 | if ((err = sysfs_create_group(&client->dev.kobj, |
894c00cf | 362 | &temp3_group))) |
add77c64 KH |
363 | goto exit_remove_sysfs_thmc50; |
364 | ||
365 | /* Register a new directory entry with module sensors */ | |
1beeffe4 TJ |
366 | data->hwmon_dev = hwmon_device_register(&client->dev); |
367 | if (IS_ERR(data->hwmon_dev)) { | |
368 | err = PTR_ERR(data->hwmon_dev); | |
add77c64 KH |
369 | goto exit_remove_sysfs; |
370 | } | |
371 | ||
372 | return 0; | |
373 | ||
374 | exit_remove_sysfs: | |
894c00cf JD |
375 | if (data->has_temp3) |
376 | sysfs_remove_group(&client->dev.kobj, &temp3_group); | |
add77c64 KH |
377 | exit_remove_sysfs_thmc50: |
378 | sysfs_remove_group(&client->dev.kobj, &thmc50_group); | |
add77c64 KH |
379 | exit_free: |
380 | kfree(data); | |
381 | exit: | |
382 | return err; | |
383 | } | |
384 | ||
ccf37488 | 385 | static int thmc50_remove(struct i2c_client *client) |
add77c64 KH |
386 | { |
387 | struct thmc50_data *data = i2c_get_clientdata(client); | |
add77c64 | 388 | |
1beeffe4 | 389 | hwmon_device_unregister(data->hwmon_dev); |
add77c64 | 390 | sysfs_remove_group(&client->dev.kobj, &thmc50_group); |
894c00cf JD |
391 | if (data->has_temp3) |
392 | sysfs_remove_group(&client->dev.kobj, &temp3_group); | |
add77c64 | 393 | |
add77c64 KH |
394 | kfree(data); |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
399 | static void thmc50_init_client(struct i2c_client *client) | |
400 | { | |
401 | struct thmc50_data *data = i2c_get_clientdata(client); | |
402 | int config; | |
403 | ||
404 | data->analog_out = i2c_smbus_read_byte_data(client, | |
405 | THMC50_REG_ANALOG_OUT); | |
406 | /* set up to at least 1 */ | |
407 | if (data->analog_out == 0) { | |
408 | data->analog_out = 1; | |
409 | i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT, | |
410 | data->analog_out); | |
411 | } | |
412 | config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF); | |
413 | config |= 0x1; /* start the chip if it is in standby mode */ | |
ccf37488 JD |
414 | if (data->type == adm1022 && (config & (1 << 7))) |
415 | data->has_temp3 = 1; | |
add77c64 KH |
416 | i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config); |
417 | } | |
418 | ||
419 | static struct thmc50_data *thmc50_update_device(struct device *dev) | |
420 | { | |
421 | struct i2c_client *client = to_i2c_client(dev); | |
422 | struct thmc50_data *data = i2c_get_clientdata(client); | |
423 | int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0); | |
424 | ||
425 | mutex_lock(&data->update_lock); | |
426 | ||
427 | if (time_after(jiffies, data->last_updated + timeout) | |
428 | || !data->valid) { | |
429 | ||
430 | int temps = data->has_temp3 ? 3 : 2; | |
431 | int i; | |
432 | for (i = 0; i < temps; i++) { | |
433 | data->temp_input[i] = i2c_smbus_read_byte_data(client, | |
434 | THMC50_REG_TEMP[i]); | |
435 | data->temp_max[i] = i2c_smbus_read_byte_data(client, | |
436 | THMC50_REG_TEMP_MAX[i]); | |
437 | data->temp_min[i] = i2c_smbus_read_byte_data(client, | |
438 | THMC50_REG_TEMP_MIN[i]); | |
439 | } | |
440 | data->analog_out = | |
441 | i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT); | |
dcf3b5fb | 442 | data->alarms = |
bba891c2 | 443 | i2c_smbus_read_byte_data(client, THMC50_REG_INTR); |
add77c64 KH |
444 | data->last_updated = jiffies; |
445 | data->valid = 1; | |
446 | } | |
447 | ||
448 | mutex_unlock(&data->update_lock); | |
449 | ||
450 | return data; | |
451 | } | |
452 | ||
453 | static int __init sm_thmc50_init(void) | |
454 | { | |
455 | return i2c_add_driver(&thmc50_driver); | |
456 | } | |
457 | ||
458 | static void __exit sm_thmc50_exit(void) | |
459 | { | |
460 | i2c_del_driver(&thmc50_driver); | |
461 | } | |
462 | ||
463 | MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>"); | |
464 | MODULE_DESCRIPTION("THMC50 driver"); | |
465 | ||
466 | module_init(sm_thmc50_init); | |
467 | module_exit(sm_thmc50_exit); |