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22#include <linux/module.h>
23#include <linux/init.h>
24#include <linux/slab.h>
25#include <linux/jiffies.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
33
34static const unsigned short normal_i2c[] = {
35 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };
36
37enum chips {
38 adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm, mc1066 };
39
40
41
42
43
44
45#define ADM1021_REG_TEMP(nr) (nr)
46#define ADM1021_REG_STATUS 0x02
47
48#define ADM1021_REG_MAN_ID 0xFE
49
50#define ADM1021_REG_DEV_ID 0xFF
51
52#define ADM1021_REG_CONFIG_R 0x03
53#define ADM1021_REG_CONFIG_W 0x09
54#define ADM1021_REG_CONV_RATE_R 0x04
55#define ADM1021_REG_CONV_RATE_W 0x0A
56
57#define ADM1023_REG_REM_TEMP_PREC 0x10
58#define ADM1023_REG_REM_OFFSET 0x11
59#define ADM1023_REG_REM_OFFSET_PREC 0x12
60#define ADM1023_REG_REM_TOS_PREC 0x13
61#define ADM1023_REG_REM_THYST_PREC 0x14
62
63
64#define ADM1021_REG_TOS_R(nr) (0x05 + 2 * (nr))
65#define ADM1021_REG_TOS_W(nr) (0x0B + 2 * (nr))
66#define ADM1021_REG_THYST_R(nr) (0x06 + 2 * (nr))
67#define ADM1021_REG_THYST_W(nr) (0x0C + 2 * (nr))
68
69#define ADM1021_REG_ONESHOT 0x0F
70
71
72
73
74
75
76
77
78
79struct adm1021_data {
80 struct device *hwmon_dev;
81 enum chips type;
82
83 struct mutex update_lock;
84 char valid;
85 char low_power;
86 unsigned long last_updated;
87
88 int temp_max[2];
89 int temp_min[2];
90 int temp[2];
91 u8 alarms;
92
93 u8 remote_temp_offset;
94 u8 remote_temp_offset_prec;
95};
96
97static int adm1021_probe(struct i2c_client *client,
98 const struct i2c_device_id *id);
99static int adm1021_detect(struct i2c_client *client,
100 struct i2c_board_info *info);
101static void adm1021_init_client(struct i2c_client *client);
102static int adm1021_remove(struct i2c_client *client);
103static struct adm1021_data *adm1021_update_device(struct device *dev);
104
105
106static int read_only;
107
108
109static const struct i2c_device_id adm1021_id[] = {
110 { "adm1021", adm1021 },
111 { "adm1023", adm1023 },
112 { "max1617", max1617 },
113 { "max1617a", max1617a },
114 { "thmc10", thmc10 },
115 { "lm84", lm84 },
116 { "gl523sm", gl523sm },
117 { "mc1066", mc1066 },
118 { }
119};
120MODULE_DEVICE_TABLE(i2c, adm1021_id);
121
122
123static struct i2c_driver adm1021_driver = {
124 .class = I2C_CLASS_HWMON,
125 .driver = {
126 .name = "adm1021",
127 },
128 .probe = adm1021_probe,
129 .remove = adm1021_remove,
130 .id_table = adm1021_id,
131 .detect = adm1021_detect,
132 .address_list = normal_i2c,
133};
134
135static ssize_t show_temp(struct device *dev,
136 struct device_attribute *devattr, char *buf)
137{
138 int index = to_sensor_dev_attr(devattr)->index;
139 struct adm1021_data *data = adm1021_update_device(dev);
140
141 return sprintf(buf, "%d\n", data->temp[index]);
142}
143
144static ssize_t show_temp_max(struct device *dev,
145 struct device_attribute *devattr, char *buf)
146{
147 int index = to_sensor_dev_attr(devattr)->index;
148 struct adm1021_data *data = adm1021_update_device(dev);
149
150 return sprintf(buf, "%d\n", data->temp_max[index]);
151}
152
153static ssize_t show_temp_min(struct device *dev,
154 struct device_attribute *devattr, char *buf)
155{
156 int index = to_sensor_dev_attr(devattr)->index;
157 struct adm1021_data *data = adm1021_update_device(dev);
158
159 return sprintf(buf, "%d\n", data->temp_min[index]);
160}
161
162static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
163 char *buf)
164{
165 int index = to_sensor_dev_attr(attr)->index;
166 struct adm1021_data *data = adm1021_update_device(dev);
167 return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
168}
169
170static ssize_t show_alarms(struct device *dev,
171 struct device_attribute *attr,
172 char *buf)
173{
174 struct adm1021_data *data = adm1021_update_device(dev);
175 return sprintf(buf, "%u\n", data->alarms);
176}
177
178static ssize_t set_temp_max(struct device *dev,
179 struct device_attribute *devattr,
180 const char *buf, size_t count)
181{
182 int index = to_sensor_dev_attr(devattr)->index;
183 struct i2c_client *client = to_i2c_client(dev);
184 struct adm1021_data *data = i2c_get_clientdata(client);
185 long temp = simple_strtol(buf, NULL, 10) / 1000;
186
187 mutex_lock(&data->update_lock);
188 data->temp_max[index] = SENSORS_LIMIT(temp, -128, 127);
189 if (!read_only)
190 i2c_smbus_write_byte_data(client, ADM1021_REG_TOS_W(index),
191 data->temp_max[index]);
192 mutex_unlock(&data->update_lock);
193
194 return count;
195}
196
197static ssize_t set_temp_min(struct device *dev,
198 struct device_attribute *devattr,
199 const char *buf, size_t count)
200{
201 int index = to_sensor_dev_attr(devattr)->index;
202 struct i2c_client *client = to_i2c_client(dev);
203 struct adm1021_data *data = i2c_get_clientdata(client);
204 long temp = simple_strtol(buf, NULL, 10) / 1000;
205
206 mutex_lock(&data->update_lock);
207 data->temp_min[index] = SENSORS_LIMIT(temp, -128, 127);
208 if (!read_only)
209 i2c_smbus_write_byte_data(client, ADM1021_REG_THYST_W(index),
210 data->temp_min[index]);
211 mutex_unlock(&data->update_lock);
212
213 return count;
214}
215
216static ssize_t show_low_power(struct device *dev,
217 struct device_attribute *devattr, char *buf)
218{
219 struct adm1021_data *data = adm1021_update_device(dev);
220 return sprintf(buf, "%d\n", data->low_power);
221}
222
223static ssize_t set_low_power(struct device *dev,
224 struct device_attribute *devattr,
225 const char *buf, size_t count)
226{
227 struct i2c_client *client = to_i2c_client(dev);
228 struct adm1021_data *data = i2c_get_clientdata(client);
229 int low_power = simple_strtol(buf, NULL, 10) != 0;
230
231 mutex_lock(&data->update_lock);
232 if (low_power != data->low_power) {
233 int config = i2c_smbus_read_byte_data(
234 client, ADM1021_REG_CONFIG_R);
235 data->low_power = low_power;
236 i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W,
237 (config & 0xBF) | (low_power << 6));
238 }
239 mutex_unlock(&data->update_lock);
240
241 return count;
242}
243
244
245static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
246static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
247 set_temp_max, 0);
248static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
249 set_temp_min, 0);
250static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
251static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
252 set_temp_max, 1);
253static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
254 set_temp_min, 1);
255static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
256static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5);
257static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
258static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
259static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
260
261static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
262static DEVICE_ATTR(low_power, S_IWUSR | S_IRUGO, show_low_power, set_low_power);
263
264static struct attribute *adm1021_attributes[] = {
265 &sensor_dev_attr_temp1_max.dev_attr.attr,
266 &sensor_dev_attr_temp1_min.dev_attr.attr,
267 &sensor_dev_attr_temp1_input.dev_attr.attr,
268 &sensor_dev_attr_temp2_max.dev_attr.attr,
269 &sensor_dev_attr_temp2_min.dev_attr.attr,
270 &sensor_dev_attr_temp2_input.dev_attr.attr,
271 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
272 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
273 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
274 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
275 &sensor_dev_attr_temp2_fault.dev_attr.attr,
276 &dev_attr_alarms.attr,
277 &dev_attr_low_power.attr,
278 NULL
279};
280
281static const struct attribute_group adm1021_group = {
282 .attrs = adm1021_attributes,
283};
284
285
286static int adm1021_detect(struct i2c_client *client,
287 struct i2c_board_info *info)
288{
289 struct i2c_adapter *adapter = client->adapter;
290 const char *type_name;
291 int conv_rate, status, config, man_id, dev_id;
292
293 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
294 pr_debug("adm1021: detect failed, "
295 "smbus byte data not supported!\n");
296 return -ENODEV;
297 }
298
299 status = i2c_smbus_read_byte_data(client, ADM1021_REG_STATUS);
300 conv_rate = i2c_smbus_read_byte_data(client,
301 ADM1021_REG_CONV_RATE_R);
302 config = i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R);
303
304
305 if ((status & 0x03) || (config & 0x3F) || (conv_rate & 0xF8)) {
306 pr_debug("adm1021: detect failed, chip not detected!\n");
307 return -ENODEV;
308 }
309
310
311 man_id = i2c_smbus_read_byte_data(client, ADM1021_REG_MAN_ID);
312 dev_id = i2c_smbus_read_byte_data(client, ADM1021_REG_DEV_ID);
313
314 if (man_id == 0x4d && dev_id == 0x01)
315 type_name = "max1617a";
316 else if (man_id == 0x41) {
317 if ((dev_id & 0xF0) == 0x30)
318 type_name = "adm1023";
319 else
320 type_name = "adm1021";
321 } else if (man_id == 0x49)
322 type_name = "thmc10";
323 else if (man_id == 0x23)
324 type_name = "gl523sm";
325 else if (man_id == 0x54)
326 type_name = "mc1066";
327
328 else if (conv_rate == 0x00
329 && (config & 0x7F) == 0x00
330 && (status & 0xAB) == 0x00)
331 type_name = "lm84";
332 else
333 type_name = "max1617";
334
335 pr_debug("adm1021: Detected chip %s at adapter %d, address 0x%02x.\n",
336 type_name, i2c_adapter_id(adapter), client->addr);
337 strlcpy(info->type, type_name, I2C_NAME_SIZE);
338
339 return 0;
340}
341
342static int adm1021_probe(struct i2c_client *client,
343 const struct i2c_device_id *id)
344{
345 struct adm1021_data *data;
346 int err;
347
348 data = kzalloc(sizeof(struct adm1021_data), GFP_KERNEL);
349 if (!data) {
350 pr_debug("adm1021: detect failed, kzalloc failed!\n");
351 err = -ENOMEM;
352 goto error0;
353 }
354
355 i2c_set_clientdata(client, data);
356 data->type = id->driver_data;
357 mutex_init(&data->update_lock);
358
359
360 if (data->type != lm84 && !read_only)
361 adm1021_init_client(client);
362
363
364 if ((err = sysfs_create_group(&client->dev.kobj, &adm1021_group)))
365 goto error1;
366
367 data->hwmon_dev = hwmon_device_register(&client->dev);
368 if (IS_ERR(data->hwmon_dev)) {
369 err = PTR_ERR(data->hwmon_dev);
370 goto error3;
371 }
372
373 return 0;
374
375error3:
376 sysfs_remove_group(&client->dev.kobj, &adm1021_group);
377error1:
378 kfree(data);
379error0:
380 return err;
381}
382
383static void adm1021_init_client(struct i2c_client *client)
384{
385
386 i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W,
387 i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R) & 0xBF);
388
389 i2c_smbus_write_byte_data(client, ADM1021_REG_CONV_RATE_W, 0x04);
390}
391
392static int adm1021_remove(struct i2c_client *client)
393{
394 struct adm1021_data *data = i2c_get_clientdata(client);
395
396 hwmon_device_unregister(data->hwmon_dev);
397 sysfs_remove_group(&client->dev.kobj, &adm1021_group);
398
399 kfree(data);
400 return 0;
401}
402
403static struct adm1021_data *adm1021_update_device(struct device *dev)
404{
405 struct i2c_client *client = to_i2c_client(dev);
406 struct adm1021_data *data = i2c_get_clientdata(client);
407
408 mutex_lock(&data->update_lock);
409
410 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
411 || !data->valid) {
412 int i;
413
414 dev_dbg(&client->dev, "Starting adm1021 update\n");
415
416 for (i = 0; i < 2; i++) {
417 data->temp[i] = 1000 *
418 (s8) i2c_smbus_read_byte_data(
419 client, ADM1021_REG_TEMP(i));
420 data->temp_max[i] = 1000 *
421 (s8) i2c_smbus_read_byte_data(
422 client, ADM1021_REG_TOS_R(i));
423 data->temp_min[i] = 1000 *
424 (s8) i2c_smbus_read_byte_data(
425 client, ADM1021_REG_THYST_R(i));
426 }
427 data->alarms = i2c_smbus_read_byte_data(client,
428 ADM1021_REG_STATUS) & 0x7c;
429 if (data->type == adm1023) {
430
431
432 data->temp[1] += 125 * (i2c_smbus_read_byte_data(
433 client, ADM1023_REG_REM_TEMP_PREC) >> 5);
434 data->temp_max[1] += 125 * (i2c_smbus_read_byte_data(
435 client, ADM1023_REG_REM_TOS_PREC) >> 5);
436 data->temp_min[1] += 125 * (i2c_smbus_read_byte_data(
437 client, ADM1023_REG_REM_THYST_PREC) >> 5);
438 data->remote_temp_offset =
439 i2c_smbus_read_byte_data(client,
440 ADM1023_REG_REM_OFFSET);
441 data->remote_temp_offset_prec =
442 i2c_smbus_read_byte_data(client,
443 ADM1023_REG_REM_OFFSET_PREC);
444 }
445 data->last_updated = jiffies;
446 data->valid = 1;
447 }
448
449 mutex_unlock(&data->update_lock);
450
451 return data;
452}
453
454static int __init sensors_adm1021_init(void)
455{
456 return i2c_add_driver(&adm1021_driver);
457}
458
459static void __exit sensors_adm1021_exit(void)
460{
461 i2c_del_driver(&adm1021_driver);
462}
463
464MODULE_AUTHOR ("Frodo Looijaard <frodol@dds.nl> and "
465 "Philip Edelbrock <phil@netroedge.com>");
466MODULE_DESCRIPTION("adm1021 driver");
467MODULE_LICENSE("GPL");
468
469module_param(read_only, bool, 0);
470MODULE_PARM_DESC(read_only, "Don't set any values, read only mode");
471
472module_init(sensors_adm1021_init)
473module_exit(sensors_adm1021_exit)
474
