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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
32MODULE_LICENSE("GPL");
33
34/* Addresses to scan */
35static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
36
37/* Insmod parameters */
38enum chips { thmc50, adm1022 };
39
40static unsigned short adm1022_temp3[16];
41static unsigned int adm1022_temp3_num;
42module_param_array(adm1022_temp3, ushort, &adm1022_temp3_num, 0);
43MODULE_PARM_DESC(adm1022_temp3, "List of adapter,address pairs "
44 "to enable 3rd temperature (ADM1022 only)");
45
46/* Many THMC50 constants specified below */
47
48/* The THMC50 registers */
49#define THMC50_REG_CONF 0x40
50#define THMC50_REG_COMPANY_ID 0x3E
51#define THMC50_REG_DIE_CODE 0x3F
52#define THMC50_REG_ANALOG_OUT 0x19
53/*
54 * The mirror status register cannot be used as
55 * reading it does not clear alarms.
56 */
57#define THMC50_REG_INTR 0x41
58
59static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
60static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
61static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
62static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 };
63static const u8 THMC50_REG_TEMP_DEFAULT[] = { 0x17, 0x18, 0x18 };
64
65#define THMC50_REG_CONF_nFANOFF 0x20
66#define THMC50_REG_CONF_PROGRAMMED 0x08
67
68/* Each client has this additional data */
69struct thmc50_data {
70 struct device *hwmon_dev;
71
72 struct mutex update_lock;
73 enum chips type;
74 unsigned long last_updated; /* In jiffies */
75 char has_temp3; /* !=0 if it is ADM1022 in temp3 mode */
76 char valid; /* !=0 if following fields are valid */
77
78 /* Register values */
79 s8 temp_input[3];
80 s8 temp_max[3];
81 s8 temp_min[3];
82 s8 temp_critical[3];
83 u8 analog_out;
84 u8 alarms;
85};
86
87static int thmc50_detect(struct i2c_client *client,
88 struct i2c_board_info *info);
89static int thmc50_probe(struct i2c_client *client,
90 const struct i2c_device_id *id);
91static int thmc50_remove(struct i2c_client *client);
92static void thmc50_init_client(struct i2c_client *client);
93static struct thmc50_data *thmc50_update_device(struct device *dev);
94
95static const struct i2c_device_id thmc50_id[] = {
96 { "adm1022", adm1022 },
97 { "thmc50", thmc50 },
98 { }
99};
100MODULE_DEVICE_TABLE(i2c, thmc50_id);
101
102static struct i2c_driver thmc50_driver = {
103 .class = I2C_CLASS_HWMON,
104 .driver = {
105 .name = "thmc50",
106 },
107 .probe = thmc50_probe,
108 .remove = thmc50_remove,
109 .id_table = thmc50_id,
110 .detect = thmc50_detect,
111 .address_list = normal_i2c,
112};
113
114static ssize_t show_analog_out(struct device *dev,
115 struct device_attribute *attr, char *buf)
116{
117 struct thmc50_data *data = thmc50_update_device(dev);
118 return sprintf(buf, "%d\n", data->analog_out);
119}
120
121static ssize_t set_analog_out(struct device *dev,
122 struct device_attribute *attr,
123 const char *buf, size_t count)
124{
125 struct i2c_client *client = to_i2c_client(dev);
126 struct thmc50_data *data = i2c_get_clientdata(client);
127 int tmp = simple_strtoul(buf, NULL, 10);
128 int config;
129
130 mutex_lock(&data->update_lock);
131 data->analog_out = SENSORS_LIMIT(tmp, 0, 255);
132 i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
133 data->analog_out);
134
135 config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
136 if (data->analog_out == 0)
137 config &= ~THMC50_REG_CONF_nFANOFF;
138 else
139 config |= THMC50_REG_CONF_nFANOFF;
140 i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
141
142 mutex_unlock(&data->update_lock);
143 return count;
144}
145
146/* There is only one PWM mode = DC */
147static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr,
148 char *buf)
149{
150 return sprintf(buf, "0\n");
151}
152
153/* Temperatures */
154static ssize_t show_temp(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_input[nr] * 1000);
160}
161
162static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
163 char *buf)
164{
165 int nr = to_sensor_dev_attr(attr)->index;
166 struct thmc50_data *data = thmc50_update_device(dev);
167 return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
168}
169
170static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
171 const char *buf, size_t count)
172{
173 int nr = to_sensor_dev_attr(attr)->index;
174 struct i2c_client *client = to_i2c_client(dev);
175 struct thmc50_data *data = i2c_get_clientdata(client);
176 int val = simple_strtol(buf, NULL, 10);
177
178 mutex_lock(&data->update_lock);
179 data->temp_min[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
180 i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
181 data->temp_min[nr]);
182 mutex_unlock(&data->update_lock);
183 return count;
184}
185
186static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
187 char *buf)
188{
189 int nr = to_sensor_dev_attr(attr)->index;
190 struct thmc50_data *data = thmc50_update_device(dev);
191 return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
192}
193
194static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
195 const char *buf, size_t count)
196{
197 int nr = to_sensor_dev_attr(attr)->index;
198 struct i2c_client *client = to_i2c_client(dev);
199 struct thmc50_data *data = i2c_get_clientdata(client);
200 int val = simple_strtol(buf, NULL, 10);
201
202 mutex_lock(&data->update_lock);
203 data->temp_max[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
204 i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
205 data->temp_max[nr]);
206 mutex_unlock(&data->update_lock);
207 return count;
208}
209
210static ssize_t show_temp_critical(struct device *dev,
211 struct device_attribute *attr,
212 char *buf)
213{
214 int nr = to_sensor_dev_attr(attr)->index;
215 struct thmc50_data *data = thmc50_update_device(dev);
216 return sprintf(buf, "%d\n", data->temp_critical[nr] * 1000);
217}
218
219static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
220 char *buf)
221{
222 int index = to_sensor_dev_attr(attr)->index;
223 struct thmc50_data *data = thmc50_update_device(dev);
224
225 return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
226}
227
228#define temp_reg(offset) \
229static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp, \
230 NULL, offset - 1); \
231static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
232 show_temp_min, set_temp_min, offset - 1); \
233static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
234 show_temp_max, set_temp_max, offset - 1); \
235static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO, \
236 show_temp_critical, NULL, offset - 1);
237
238temp_reg(1);
239temp_reg(2);
240temp_reg(3);
241
242static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0);
243static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
244static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1);
245static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7);
246static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);
247
248static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_analog_out,
249 set_analog_out, 0);
250static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
251
252static struct attribute *thmc50_attributes[] = {
253 &sensor_dev_attr_temp1_max.dev_attr.attr,
254 &sensor_dev_attr_temp1_min.dev_attr.attr,
255 &sensor_dev_attr_temp1_input.dev_attr.attr,
256 &sensor_dev_attr_temp1_crit.dev_attr.attr,
257 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
258 &sensor_dev_attr_temp2_max.dev_attr.attr,
259 &sensor_dev_attr_temp2_min.dev_attr.attr,
260 &sensor_dev_attr_temp2_input.dev_attr.attr,
261 &sensor_dev_attr_temp2_crit.dev_attr.attr,
262 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
263 &sensor_dev_attr_temp2_fault.dev_attr.attr,
264 &sensor_dev_attr_pwm1.dev_attr.attr,
265 &sensor_dev_attr_pwm1_mode.dev_attr.attr,
266 NULL
267};
268
269static const struct attribute_group thmc50_group = {
270 .attrs = thmc50_attributes,
271};
272
273/* for ADM1022 3rd temperature mode */
274static struct attribute *temp3_attributes[] = {
275 &sensor_dev_attr_temp3_max.dev_attr.attr,
276 &sensor_dev_attr_temp3_min.dev_attr.attr,
277 &sensor_dev_attr_temp3_input.dev_attr.attr,
278 &sensor_dev_attr_temp3_crit.dev_attr.attr,
279 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
280 &sensor_dev_attr_temp3_fault.dev_attr.attr,
281 NULL
282};
283
284static const struct attribute_group temp3_group = {
285 .attrs = temp3_attributes,
286};
287
288/* Return 0 if detection is successful, -ENODEV otherwise */
289static int thmc50_detect(struct i2c_client *client,
290 struct i2c_board_info *info)
291{
292 unsigned company;
293 unsigned revision;
294 unsigned config;
295 struct i2c_adapter *adapter = client->adapter;
296 const char *type_name;
297
298 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
299 pr_debug("thmc50: detect failed, "
300 "smbus byte data not supported!\n");
301 return -ENODEV;
302 }
303
304 pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
305 client->addr, i2c_adapter_id(client->adapter));
306
307 company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
308 revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
309 config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
310 if (revision < 0xc0 || (config & 0x10))
311 return -ENODEV;
312
313 if (company == 0x41) {
314 int id = i2c_adapter_id(client->adapter);
315 int i;
316
317 type_name = "adm1022";
318 for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
319 if (adm1022_temp3[i] == id &&
320 adm1022_temp3[i + 1] == client->addr) {
321 /* enable 2nd remote temp */
322 config |= (1 << 7);
323 i2c_smbus_write_byte_data(client,
324 THMC50_REG_CONF,
325 config);
326 break;
327 }
328 } else if (company == 0x49) {
329 type_name = "thmc50";
330 } else {
331 pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
332 return -ENODEV;
333 }
334
335 pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
336 type_name, (revision >> 4) - 0xc, revision & 0xf);
337
338 strlcpy(info->type, type_name, I2C_NAME_SIZE);
339
340 return 0;
341}
342
343static int thmc50_probe(struct i2c_client *client,
344 const struct i2c_device_id *id)
345{
346 struct thmc50_data *data;
347 int err;
348
349 data = kzalloc(sizeof(struct thmc50_data), GFP_KERNEL);
350 if (!data) {
351 pr_debug("thmc50: detect failed, kzalloc failed!\n");
352 err = -ENOMEM;
353 goto exit;
354 }
355
356 i2c_set_clientdata(client, data);
357 data->type = id->driver_data;
358 mutex_init(&data->update_lock);
359
360 thmc50_init_client(client);
361
362 /* Register sysfs hooks */
363 if ((err = sysfs_create_group(&client->dev.kobj, &thmc50_group)))
364 goto exit_free;
365
366 /* Register ADM1022 sysfs hooks */
367 if (data->has_temp3)
368 if ((err = sysfs_create_group(&client->dev.kobj,
369 &temp3_group)))
370 goto exit_remove_sysfs_thmc50;
371
372 /* Register a new directory entry with module sensors */
373 data->hwmon_dev = hwmon_device_register(&client->dev);
374 if (IS_ERR(data->hwmon_dev)) {
375 err = PTR_ERR(data->hwmon_dev);
376 goto exit_remove_sysfs;
377 }
378
379 return 0;
380
381exit_remove_sysfs:
382 if (data->has_temp3)
383 sysfs_remove_group(&client->dev.kobj, &temp3_group);
384exit_remove_sysfs_thmc50:
385 sysfs_remove_group(&client->dev.kobj, &thmc50_group);
386exit_free:
387 kfree(data);
388exit:
389 return err;
390}
391
392static int thmc50_remove(struct i2c_client *client)
393{
394 struct thmc50_data *data = i2c_get_clientdata(client);
395
396 hwmon_device_unregister(data->hwmon_dev);
397 sysfs_remove_group(&client->dev.kobj, &thmc50_group);
398 if (data->has_temp3)
399 sysfs_remove_group(&client->dev.kobj, &temp3_group);
400
401 kfree(data);
402
403 return 0;
404}
405
406static void thmc50_init_client(struct i2c_client *client)
407{
408 struct thmc50_data *data = i2c_get_clientdata(client);
409 int config;
410
411 data->analog_out = i2c_smbus_read_byte_data(client,
412 THMC50_REG_ANALOG_OUT);
413 /* set up to at least 1 */
414 if (data->analog_out == 0) {
415 data->analog_out = 1;
416 i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
417 data->analog_out);
418 }
419 config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
420 config |= 0x1; /* start the chip if it is in standby mode */
421 if (data->type == adm1022 && (config & (1 << 7)))
422 data->has_temp3 = 1;
423 i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
424}
425
426static struct thmc50_data *thmc50_update_device(struct device *dev)
427{
428 struct i2c_client *client = to_i2c_client(dev);
429 struct thmc50_data *data = i2c_get_clientdata(client);
430 int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);
431
432 mutex_lock(&data->update_lock);
433
434 if (time_after(jiffies, data->last_updated + timeout)
435 || !data->valid) {
436
437 int temps = data->has_temp3 ? 3 : 2;
438 int i;
439 int prog = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
440
441 prog &= THMC50_REG_CONF_PROGRAMMED;
442
443 for (i = 0; i < temps; i++) {
444 data->temp_input[i] = i2c_smbus_read_byte_data(client,
445 THMC50_REG_TEMP[i]);
446 data->temp_max[i] = i2c_smbus_read_byte_data(client,
447 THMC50_REG_TEMP_MAX[i]);
448 data->temp_min[i] = i2c_smbus_read_byte_data(client,
449 THMC50_REG_TEMP_MIN[i]);
450 data->temp_critical[i] =
451 i2c_smbus_read_byte_data(client,
452 prog ? THMC50_REG_TEMP_CRITICAL[i]
453 : THMC50_REG_TEMP_DEFAULT[i]);
454 }
455 data->analog_out =
456 i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
457 data->alarms =
458 i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
459 data->last_updated = jiffies;
460 data->valid = 1;
461 }
462
463 mutex_unlock(&data->update_lock);
464
465 return data;
466}
467
468static int __init sm_thmc50_init(void)
469{
470 return i2c_add_driver(&thmc50_driver);
471}
472
473static void __exit sm_thmc50_exit(void)
474{
475 i2c_del_driver(&thmc50_driver);
476}
477
478MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
479MODULE_DESCRIPTION("THMC50 driver");
480
481module_init(sm_thmc50_init);
482module_exit(sm_thmc50_exit);
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
33MODULE_LICENSE("GPL");
34
35/* Addresses to scan */
36static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
37
38/* Insmod parameters */
39enum chips { thmc50, adm1022 };
40
41static unsigned short adm1022_temp3[16];
42static unsigned int adm1022_temp3_num;
43module_param_array(adm1022_temp3, ushort, &adm1022_temp3_num, 0);
44MODULE_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
60static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
61static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
62static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
63static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 };
64static 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 */
70struct 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
88static int thmc50_detect(struct i2c_client *client,
89 struct i2c_board_info *info);
90static int thmc50_probe(struct i2c_client *client,
91 const struct i2c_device_id *id);
92static int thmc50_remove(struct i2c_client *client);
93static void thmc50_init_client(struct i2c_client *client);
94static struct thmc50_data *thmc50_update_device(struct device *dev);
95
96static const struct i2c_device_id thmc50_id[] = {
97 { "adm1022", adm1022 },
98 { "thmc50", thmc50 },
99 { }
100};
101MODULE_DEVICE_TABLE(i2c, thmc50_id);
102
103static 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
115static 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
122static 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 */
153static 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 */
160static 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
168static 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
176static 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
197static 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
205static 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
226static 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
235static 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) \
245static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp, \
246 NULL, offset - 1); \
247static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
248 show_temp_min, set_temp_min, offset - 1); \
249static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
250 show_temp_max, set_temp_max, offset - 1); \
251static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO, \
252 show_temp_critical, NULL, offset - 1);
253
254temp_reg(1);
255temp_reg(2);
256temp_reg(3);
257
258static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0);
259static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
260static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1);
261static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7);
262static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);
263
264static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_analog_out,
265 set_analog_out, 0);
266static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
267
268static 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
285static const struct attribute_group thmc50_group = {
286 .attrs = thmc50_attributes,
287};
288
289/* for ADM1022 3rd temperature mode */
290static 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
300static const struct attribute_group temp3_group = {
301 .attrs = temp3_attributes,
302};
303
304/* Return 0 if detection is successful, -ENODEV otherwise */
305static 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
358static 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
396exit_remove_sysfs:
397 if (data->has_temp3)
398 sysfs_remove_group(&client->dev.kobj, &temp3_group);
399exit_remove_sysfs_thmc50:
400 sysfs_remove_group(&client->dev.kobj, &thmc50_group);
401 return err;
402}
403
404static 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
416static 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
436static 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
478module_i2c_driver(thmc50_driver);
479
480MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
481MODULE_DESCRIPTION("THMC50 driver");