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add77c64 | 1 | /* |
4d387df7 GR |
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 | */ | |
add77c64 KH |
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> | |
dcd8f392 | 31 | #include <linux/jiffies.h> |
add77c64 KH |
32 | |
33 | MODULE_LICENSE("GPL"); | |
34 | ||
35 | /* Addresses to scan */ | |
25e9c86d | 36 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; |
add77c64 KH |
37 | |
38 | /* Insmod parameters */ | |
e5e9f44c | 39 | enum chips { thmc50, adm1022 }; |
f95f0b4c JD |
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); | |
b55f3757 GR |
44 | MODULE_PARM_DESC(adm1022_temp3, |
45 | "List of adapter,address pairs to enable 3rd temperature (ADM1022 only)"); | |
add77c64 KH |
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 | |
dcf3b5fb | 54 | /* |
bba891c2 KH |
55 | * The mirror status register cannot be used as |
56 | * reading it does not clear alarms. | |
dcf3b5fb | 57 | */ |
bba891c2 | 58 | #define THMC50_REG_INTR 0x41 |
add77c64 | 59 | |
5910a9b2 TK |
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 }; | |
84f768c1 KH |
63 | static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 }; |
64 | static const u8 THMC50_REG_TEMP_DEFAULT[] = { 0x17, 0x18, 0x18 }; | |
add77c64 KH |
65 | |
66 | #define THMC50_REG_CONF_nFANOFF 0x20 | |
84f768c1 | 67 | #define THMC50_REG_CONF_PROGRAMMED 0x08 |
add77c64 KH |
68 | |
69 | /* Each client has this additional data */ | |
70 | struct thmc50_data { | |
86fd260e AL |
71 | struct i2c_client *client; |
72 | const struct attribute_group *groups[3]; | |
add77c64 KH |
73 | |
74 | struct mutex update_lock; | |
75 | enum chips type; | |
76 | unsigned long last_updated; /* In jiffies */ | |
77 | char has_temp3; /* !=0 if it is ADM1022 in temp3 mode */ | |
78 | char valid; /* !=0 if following fields are valid */ | |
79 | ||
80 | /* Register values */ | |
81 | s8 temp_input[3]; | |
82 | s8 temp_max[3]; | |
83 | s8 temp_min[3]; | |
84f768c1 | 84 | s8 temp_critical[3]; |
add77c64 | 85 | u8 analog_out; |
dcf3b5fb | 86 | u8 alarms; |
add77c64 KH |
87 | }; |
88 | ||
9b38a66e AL |
89 | static struct thmc50_data *thmc50_update_device(struct device *dev) |
90 | { | |
86fd260e AL |
91 | struct thmc50_data *data = dev_get_drvdata(dev); |
92 | struct i2c_client *client = data->client; | |
9b38a66e | 93 | int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0); |
add77c64 | 94 | |
9b38a66e | 95 | mutex_lock(&data->update_lock); |
ccf37488 | 96 | |
9b38a66e AL |
97 | if (time_after(jiffies, data->last_updated + timeout) |
98 | || !data->valid) { | |
99 | ||
100 | int temps = data->has_temp3 ? 3 : 2; | |
101 | int i; | |
102 | int prog = i2c_smbus_read_byte_data(client, THMC50_REG_CONF); | |
103 | ||
104 | prog &= THMC50_REG_CONF_PROGRAMMED; | |
105 | ||
106 | for (i = 0; i < temps; i++) { | |
107 | data->temp_input[i] = i2c_smbus_read_byte_data(client, | |
108 | THMC50_REG_TEMP[i]); | |
109 | data->temp_max[i] = i2c_smbus_read_byte_data(client, | |
110 | THMC50_REG_TEMP_MAX[i]); | |
111 | data->temp_min[i] = i2c_smbus_read_byte_data(client, | |
112 | THMC50_REG_TEMP_MIN[i]); | |
113 | data->temp_critical[i] = | |
114 | i2c_smbus_read_byte_data(client, | |
115 | prog ? THMC50_REG_TEMP_CRITICAL[i] | |
116 | : THMC50_REG_TEMP_DEFAULT[i]); | |
117 | } | |
118 | data->analog_out = | |
119 | i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT); | |
120 | data->alarms = | |
121 | i2c_smbus_read_byte_data(client, THMC50_REG_INTR); | |
122 | data->last_updated = jiffies; | |
123 | data->valid = 1; | |
124 | } | |
125 | ||
126 | mutex_unlock(&data->update_lock); | |
127 | ||
128 | return data; | |
129 | } | |
add77c64 KH |
130 | |
131 | static ssize_t show_analog_out(struct device *dev, | |
132 | struct device_attribute *attr, char *buf) | |
133 | { | |
134 | struct thmc50_data *data = thmc50_update_device(dev); | |
135 | return sprintf(buf, "%d\n", data->analog_out); | |
136 | } | |
137 | ||
138 | static ssize_t set_analog_out(struct device *dev, | |
139 | struct device_attribute *attr, | |
140 | const char *buf, size_t count) | |
141 | { | |
86fd260e AL |
142 | struct thmc50_data *data = dev_get_drvdata(dev); |
143 | struct i2c_client *client = data->client; | |
add77c64 | 144 | int config; |
4d387df7 GR |
145 | unsigned long tmp; |
146 | int err; | |
147 | ||
148 | err = kstrtoul(buf, 10, &tmp); | |
149 | if (err) | |
150 | return err; | |
add77c64 KH |
151 | |
152 | mutex_lock(&data->update_lock); | |
2a844c14 | 153 | data->analog_out = clamp_val(tmp, 0, 255); |
add77c64 KH |
154 | i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT, |
155 | data->analog_out); | |
156 | ||
157 | config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF); | |
158 | if (data->analog_out == 0) | |
159 | config &= ~THMC50_REG_CONF_nFANOFF; | |
160 | else | |
161 | config |= THMC50_REG_CONF_nFANOFF; | |
162 | i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config); | |
163 | ||
164 | mutex_unlock(&data->update_lock); | |
165 | return count; | |
166 | } | |
167 | ||
168 | /* There is only one PWM mode = DC */ | |
169 | static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr, | |
170 | char *buf) | |
171 | { | |
172 | return sprintf(buf, "0\n"); | |
173 | } | |
174 | ||
175 | /* Temperatures */ | |
176 | static ssize_t show_temp(struct device *dev, struct device_attribute *attr, | |
177 | char *buf) | |
178 | { | |
179 | int nr = to_sensor_dev_attr(attr)->index; | |
180 | struct thmc50_data *data = thmc50_update_device(dev); | |
181 | return sprintf(buf, "%d\n", data->temp_input[nr] * 1000); | |
182 | } | |
183 | ||
184 | static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, | |
185 | char *buf) | |
186 | { | |
187 | int nr = to_sensor_dev_attr(attr)->index; | |
188 | struct thmc50_data *data = thmc50_update_device(dev); | |
189 | return sprintf(buf, "%d\n", data->temp_min[nr] * 1000); | |
190 | } | |
191 | ||
192 | static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, | |
193 | const char *buf, size_t count) | |
194 | { | |
195 | int nr = to_sensor_dev_attr(attr)->index; | |
86fd260e AL |
196 | struct thmc50_data *data = dev_get_drvdata(dev); |
197 | struct i2c_client *client = data->client; | |
4d387df7 GR |
198 | long val; |
199 | int err; | |
200 | ||
201 | err = kstrtol(buf, 10, &val); | |
202 | if (err) | |
203 | return err; | |
add77c64 KH |
204 | |
205 | mutex_lock(&data->update_lock); | |
2a844c14 | 206 | data->temp_min[nr] = clamp_val(val / 1000, -128, 127); |
add77c64 KH |
207 | i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr], |
208 | data->temp_min[nr]); | |
209 | mutex_unlock(&data->update_lock); | |
210 | return count; | |
211 | } | |
212 | ||
213 | static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, | |
214 | char *buf) | |
215 | { | |
216 | int nr = to_sensor_dev_attr(attr)->index; | |
217 | struct thmc50_data *data = thmc50_update_device(dev); | |
218 | return sprintf(buf, "%d\n", data->temp_max[nr] * 1000); | |
219 | } | |
220 | ||
221 | static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, | |
222 | const char *buf, size_t count) | |
223 | { | |
224 | int nr = to_sensor_dev_attr(attr)->index; | |
86fd260e AL |
225 | struct thmc50_data *data = dev_get_drvdata(dev); |
226 | struct i2c_client *client = data->client; | |
4d387df7 GR |
227 | long val; |
228 | int err; | |
229 | ||
230 | err = kstrtol(buf, 10, &val); | |
231 | if (err) | |
232 | return err; | |
add77c64 KH |
233 | |
234 | mutex_lock(&data->update_lock); | |
2a844c14 | 235 | data->temp_max[nr] = clamp_val(val / 1000, -128, 127); |
add77c64 KH |
236 | i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr], |
237 | data->temp_max[nr]); | |
238 | mutex_unlock(&data->update_lock); | |
239 | return count; | |
240 | } | |
241 | ||
84f768c1 KH |
242 | static ssize_t show_temp_critical(struct device *dev, |
243 | struct device_attribute *attr, | |
244 | char *buf) | |
245 | { | |
246 | int nr = to_sensor_dev_attr(attr)->index; | |
247 | struct thmc50_data *data = thmc50_update_device(dev); | |
248 | return sprintf(buf, "%d\n", data->temp_critical[nr] * 1000); | |
249 | } | |
250 | ||
dcf3b5fb KH |
251 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, |
252 | char *buf) | |
253 | { | |
254 | int index = to_sensor_dev_attr(attr)->index; | |
255 | struct thmc50_data *data = thmc50_update_device(dev); | |
256 | ||
257 | return sprintf(buf, "%u\n", (data->alarms >> index) & 1); | |
258 | } | |
259 | ||
add77c64 KH |
260 | #define temp_reg(offset) \ |
261 | static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp, \ | |
262 | NULL, offset - 1); \ | |
263 | static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \ | |
264 | show_temp_min, set_temp_min, offset - 1); \ | |
265 | static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \ | |
84f768c1 KH |
266 | show_temp_max, set_temp_max, offset - 1); \ |
267 | static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO, \ | |
268 | show_temp_critical, NULL, offset - 1); | |
add77c64 KH |
269 | |
270 | temp_reg(1); | |
271 | temp_reg(2); | |
272 | temp_reg(3); | |
273 | ||
dcf3b5fb KH |
274 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0); |
275 | static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5); | |
276 | static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1); | |
277 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7); | |
278 | static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2); | |
279 | ||
add77c64 KH |
280 | static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_analog_out, |
281 | set_analog_out, 0); | |
282 | static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0); | |
283 | ||
284 | static struct attribute *thmc50_attributes[] = { | |
285 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
286 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
287 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
84f768c1 | 288 | &sensor_dev_attr_temp1_crit.dev_attr.attr, |
dcf3b5fb | 289 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
add77c64 KH |
290 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
291 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
292 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
84f768c1 | 293 | &sensor_dev_attr_temp2_crit.dev_attr.attr, |
dcf3b5fb KH |
294 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, |
295 | &sensor_dev_attr_temp2_fault.dev_attr.attr, | |
add77c64 KH |
296 | &sensor_dev_attr_pwm1.dev_attr.attr, |
297 | &sensor_dev_attr_pwm1_mode.dev_attr.attr, | |
298 | NULL | |
299 | }; | |
300 | ||
301 | static const struct attribute_group thmc50_group = { | |
302 | .attrs = thmc50_attributes, | |
303 | }; | |
304 | ||
305 | /* for ADM1022 3rd temperature mode */ | |
894c00cf | 306 | static struct attribute *temp3_attributes[] = { |
add77c64 KH |
307 | &sensor_dev_attr_temp3_max.dev_attr.attr, |
308 | &sensor_dev_attr_temp3_min.dev_attr.attr, | |
309 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
84f768c1 | 310 | &sensor_dev_attr_temp3_crit.dev_attr.attr, |
dcf3b5fb KH |
311 | &sensor_dev_attr_temp3_alarm.dev_attr.attr, |
312 | &sensor_dev_attr_temp3_fault.dev_attr.attr, | |
add77c64 KH |
313 | NULL |
314 | }; | |
315 | ||
894c00cf JD |
316 | static const struct attribute_group temp3_group = { |
317 | .attrs = temp3_attributes, | |
add77c64 KH |
318 | }; |
319 | ||
ccf37488 | 320 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 321 | static int thmc50_detect(struct i2c_client *client, |
ccf37488 | 322 | struct i2c_board_info *info) |
add77c64 KH |
323 | { |
324 | unsigned company; | |
325 | unsigned revision; | |
326 | unsigned config; | |
ccf37488 | 327 | struct i2c_adapter *adapter = client->adapter; |
cc28a610 | 328 | const char *type_name; |
add77c64 KH |
329 | |
330 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { | |
b55f3757 | 331 | pr_debug("thmc50: detect failed, smbus byte data not supported!\n"); |
ccf37488 | 332 | return -ENODEV; |
add77c64 KH |
333 | } |
334 | ||
add77c64 KH |
335 | pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n", |
336 | client->addr, i2c_adapter_id(client->adapter)); | |
337 | ||
add77c64 KH |
338 | company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID); |
339 | revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE); | |
340 | config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF); | |
52df6440 JD |
341 | if (revision < 0xc0 || (config & 0x10)) |
342 | return -ENODEV; | |
add77c64 | 343 | |
52df6440 | 344 | if (company == 0x41) { |
add77c64 KH |
345 | int id = i2c_adapter_id(client->adapter); |
346 | int i; | |
347 | ||
348 | type_name = "adm1022"; | |
add77c64 KH |
349 | for (i = 0; i + 1 < adm1022_temp3_num; i += 2) |
350 | if (adm1022_temp3[i] == id && | |
ccf37488 | 351 | adm1022_temp3[i + 1] == client->addr) { |
add77c64 | 352 | /* enable 2nd remote temp */ |
ccf37488 JD |
353 | config |= (1 << 7); |
354 | i2c_smbus_write_byte_data(client, | |
355 | THMC50_REG_CONF, | |
356 | config); | |
add77c64 KH |
357 | break; |
358 | } | |
52df6440 | 359 | } else if (company == 0x49) { |
cc28a610 | 360 | type_name = "thmc50"; |
52df6440 JD |
361 | } else { |
362 | pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n"); | |
363 | return -ENODEV; | |
add77c64 | 364 | } |
52df6440 | 365 | |
cc28a610 JD |
366 | pr_debug("thmc50: Detected %s (version %x, revision %x)\n", |
367 | type_name, (revision >> 4) - 0xc, revision & 0xf); | |
add77c64 | 368 | |
ccf37488 | 369 | strlcpy(info->type, type_name, I2C_NAME_SIZE); |
add77c64 | 370 | |
ccf37488 JD |
371 | return 0; |
372 | } | |
373 | ||
86fd260e | 374 | static void thmc50_init_client(struct thmc50_data *data) |
9b38a66e | 375 | { |
86fd260e | 376 | struct i2c_client *client = data->client; |
9b38a66e AL |
377 | int config; |
378 | ||
379 | data->analog_out = i2c_smbus_read_byte_data(client, | |
380 | THMC50_REG_ANALOG_OUT); | |
381 | /* set up to at least 1 */ | |
382 | if (data->analog_out == 0) { | |
383 | data->analog_out = 1; | |
384 | i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT, | |
385 | data->analog_out); | |
386 | } | |
387 | config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF); | |
388 | config |= 0x1; /* start the chip if it is in standby mode */ | |
389 | if (data->type == adm1022 && (config & (1 << 7))) | |
390 | data->has_temp3 = 1; | |
391 | i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config); | |
392 | } | |
393 | ||
ccf37488 JD |
394 | static int thmc50_probe(struct i2c_client *client, |
395 | const struct i2c_device_id *id) | |
396 | { | |
86fd260e | 397 | struct device *dev = &client->dev; |
ccf37488 | 398 | struct thmc50_data *data; |
86fd260e AL |
399 | struct device *hwmon_dev; |
400 | int idx = 0; | |
ccf37488 | 401 | |
86fd260e | 402 | data = devm_kzalloc(dev, sizeof(struct thmc50_data), GFP_KERNEL); |
bd91d3ba GR |
403 | if (!data) |
404 | return -ENOMEM; | |
ccf37488 | 405 | |
86fd260e | 406 | data->client = client; |
ccf37488 JD |
407 | data->type = id->driver_data; |
408 | mutex_init(&data->update_lock); | |
add77c64 | 409 | |
86fd260e | 410 | thmc50_init_client(data); |
add77c64 | 411 | |
86fd260e AL |
412 | /* sysfs hooks */ |
413 | data->groups[idx++] = &thmc50_group; | |
add77c64 | 414 | |
86fd260e | 415 | /* Register additional ADM1022 sysfs hooks */ |
894c00cf | 416 | if (data->has_temp3) |
86fd260e | 417 | data->groups[idx++] = &temp3_group; |
add77c64 | 418 | |
86fd260e AL |
419 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
420 | data, data->groups); | |
421 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
add77c64 KH |
422 | } |
423 | ||
9b38a66e AL |
424 | static const struct i2c_device_id thmc50_id[] = { |
425 | { "adm1022", adm1022 }, | |
426 | { "thmc50", thmc50 }, | |
427 | { } | |
428 | }; | |
429 | MODULE_DEVICE_TABLE(i2c, thmc50_id); | |
add77c64 | 430 | |
9b38a66e AL |
431 | static struct i2c_driver thmc50_driver = { |
432 | .class = I2C_CLASS_HWMON, | |
433 | .driver = { | |
434 | .name = "thmc50", | |
435 | }, | |
436 | .probe = thmc50_probe, | |
9b38a66e AL |
437 | .id_table = thmc50_id, |
438 | .detect = thmc50_detect, | |
439 | .address_list = normal_i2c, | |
440 | }; | |
add77c64 | 441 | |
f0967eea | 442 | module_i2c_driver(thmc50_driver); |
add77c64 KH |
443 | |
444 | MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>"); | |
445 | MODULE_DESCRIPTION("THMC50 driver"); |