]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | adm1021.c - Part of lm_sensors, Linux kernel modules for hardware | |
3 | monitoring | |
4 | Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and | |
5 | Philip Edelbrock <phil@netroedge.com> | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
21 | ||
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 | /* Addresses to scan */ | |
34 | static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a, | |
35 | 0x29, 0x2a, 0x2b, | |
36 | 0x4c, 0x4d, 0x4e, | |
37 | I2C_CLIENT_END }; | |
38 | ||
39 | /* Insmod parameters */ | |
40 | I2C_CLIENT_INSMOD_8(adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm, | |
41 | mc1066); | |
42 | ||
43 | /* adm1021 constants specified below */ | |
44 | ||
45 | /* The adm1021 registers */ | |
46 | /* Read-only */ | |
47 | /* For nr in 0-1 */ | |
48 | #define ADM1021_REG_TEMP(nr) (nr) | |
49 | #define ADM1021_REG_STATUS 0x02 | |
50 | /* 0x41 = AD, 0x49 = TI, 0x4D = Maxim, 0x23 = Genesys , 0x54 = Onsemi */ | |
51 | #define ADM1021_REG_MAN_ID 0xFE | |
52 | /* ADM1021 = 0x0X, ADM1023 = 0x3X */ | |
53 | #define ADM1021_REG_DEV_ID 0xFF | |
54 | /* These use different addresses for reading/writing */ | |
55 | #define ADM1021_REG_CONFIG_R 0x03 | |
56 | #define ADM1021_REG_CONFIG_W 0x09 | |
57 | #define ADM1021_REG_CONV_RATE_R 0x04 | |
58 | #define ADM1021_REG_CONV_RATE_W 0x0A | |
59 | /* These are for the ADM1023's additional precision on the remote temp sensor */ | |
60 | #define ADM1023_REG_REM_TEMP_PREC 0x10 | |
61 | #define ADM1023_REG_REM_OFFSET 0x11 | |
62 | #define ADM1023_REG_REM_OFFSET_PREC 0x12 | |
63 | #define ADM1023_REG_REM_TOS_PREC 0x13 | |
64 | #define ADM1023_REG_REM_THYST_PREC 0x14 | |
65 | /* limits */ | |
66 | /* For nr in 0-1 */ | |
67 | #define ADM1021_REG_TOS_R(nr) (0x05 + 2 * (nr)) | |
68 | #define ADM1021_REG_TOS_W(nr) (0x0B + 2 * (nr)) | |
69 | #define ADM1021_REG_THYST_R(nr) (0x06 + 2 * (nr)) | |
70 | #define ADM1021_REG_THYST_W(nr) (0x0C + 2 * (nr)) | |
71 | /* write-only */ | |
72 | #define ADM1021_REG_ONESHOT 0x0F | |
73 | ||
74 | /* Initial values */ | |
75 | ||
76 | /* Note: Even though I left the low and high limits named os and hyst, | |
77 | they don't quite work like a thermostat the way the LM75 does. I.e., | |
78 | a lower temp than THYST actually triggers an alarm instead of | |
79 | clearing it. Weird, ey? --Phil */ | |
80 | ||
81 | /* Each client has this additional data */ | |
82 | struct adm1021_data { | |
83 | struct i2c_client client; | |
84 | struct device *hwmon_dev; | |
85 | enum chips type; | |
86 | ||
87 | struct mutex update_lock; | |
88 | char valid; /* !=0 if following fields are valid */ | |
89 | unsigned long last_updated; /* In jiffies */ | |
90 | ||
91 | s8 temp_max[2]; /* Register values */ | |
92 | s8 temp_min[2]; | |
93 | s8 temp[2]; | |
94 | u8 alarms; | |
95 | /* Special values for ADM1023 only */ | |
96 | u8 remote_temp_prec; | |
97 | u8 remote_temp_os_prec; | |
98 | u8 remote_temp_hyst_prec; | |
99 | u8 remote_temp_offset; | |
100 | u8 remote_temp_offset_prec; | |
101 | }; | |
102 | ||
103 | static int adm1021_attach_adapter(struct i2c_adapter *adapter); | |
104 | static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind); | |
105 | static void adm1021_init_client(struct i2c_client *client); | |
106 | static int adm1021_detach_client(struct i2c_client *client); | |
107 | static struct adm1021_data *adm1021_update_device(struct device *dev); | |
108 | ||
109 | /* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */ | |
110 | static int read_only; | |
111 | ||
112 | ||
113 | /* This is the driver that will be inserted */ | |
114 | static struct i2c_driver adm1021_driver = { | |
115 | .driver = { | |
116 | .name = "adm1021", | |
117 | }, | |
118 | .attach_adapter = adm1021_attach_adapter, | |
119 | .detach_client = adm1021_detach_client, | |
120 | }; | |
121 | ||
122 | static ssize_t show_temp(struct device *dev, | |
123 | struct device_attribute *devattr, char *buf) | |
124 | { | |
125 | int index = to_sensor_dev_attr(devattr)->index; | |
126 | struct adm1021_data *data = adm1021_update_device(dev); | |
127 | ||
128 | return sprintf(buf, "%d\n", 1000 * data->temp[index]); | |
129 | } | |
130 | ||
131 | static ssize_t show_temp_max(struct device *dev, | |
132 | struct device_attribute *devattr, char *buf) | |
133 | { | |
134 | int index = to_sensor_dev_attr(devattr)->index; | |
135 | struct adm1021_data *data = adm1021_update_device(dev); | |
136 | ||
137 | return sprintf(buf, "%d\n", 1000 * data->temp_max[index]); | |
138 | } | |
139 | ||
140 | static ssize_t show_temp_min(struct device *dev, | |
141 | struct device_attribute *devattr, char *buf) | |
142 | { | |
143 | int index = to_sensor_dev_attr(devattr)->index; | |
144 | struct adm1021_data *data = adm1021_update_device(dev); | |
145 | ||
146 | return sprintf(buf, "%d\n", 1000 * data->temp_min[index]); | |
147 | } | |
148 | ||
149 | static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, | |
150 | char *buf) | |
151 | { | |
152 | int index = to_sensor_dev_attr(attr)->index; | |
153 | struct adm1021_data *data = adm1021_update_device(dev); | |
154 | return sprintf(buf, "%u\n", (data->alarms >> index) & 1); | |
155 | } | |
156 | ||
157 | static ssize_t show_alarms(struct device *dev, | |
158 | struct device_attribute *attr, | |
159 | char *buf) | |
160 | { | |
161 | struct adm1021_data *data = adm1021_update_device(dev); | |
162 | return sprintf(buf, "%u\n", data->alarms); | |
163 | } | |
164 | ||
165 | static ssize_t set_temp_max(struct device *dev, | |
166 | struct device_attribute *devattr, | |
167 | const char *buf, size_t count) | |
168 | { | |
169 | int index = to_sensor_dev_attr(devattr)->index; | |
170 | struct i2c_client *client = to_i2c_client(dev); | |
171 | struct adm1021_data *data = i2c_get_clientdata(client); | |
172 | long temp = simple_strtol(buf, NULL, 10) / 1000; | |
173 | ||
174 | mutex_lock(&data->update_lock); | |
175 | data->temp_max[index] = SENSORS_LIMIT(temp, -128, 127); | |
176 | if (!read_only) | |
177 | i2c_smbus_write_byte_data(client, ADM1021_REG_TOS_W(index), | |
178 | data->temp_max[index]); | |
179 | mutex_unlock(&data->update_lock); | |
180 | ||
181 | return count; | |
182 | } | |
183 | ||
184 | static ssize_t set_temp_min(struct device *dev, | |
185 | struct device_attribute *devattr, | |
186 | const char *buf, size_t count) | |
187 | { | |
188 | int index = to_sensor_dev_attr(devattr)->index; | |
189 | struct i2c_client *client = to_i2c_client(dev); | |
190 | struct adm1021_data *data = i2c_get_clientdata(client); | |
191 | long temp = simple_strtol(buf, NULL, 10) / 1000; | |
192 | ||
193 | mutex_lock(&data->update_lock); | |
194 | data->temp_min[index] = SENSORS_LIMIT(temp, -128, 127); | |
195 | if (!read_only) | |
196 | i2c_smbus_write_byte_data(client, ADM1021_REG_THYST_W(index), | |
197 | data->temp_min[index]); | |
198 | mutex_unlock(&data->update_lock); | |
199 | ||
200 | return count; | |
201 | } | |
202 | ||
203 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); | |
204 | static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, | |
205 | set_temp_max, 0); | |
206 | static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min, | |
207 | set_temp_min, 0); | |
208 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); | |
209 | static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max, | |
210 | set_temp_max, 1); | |
211 | static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min, | |
212 | set_temp_min, 1); | |
213 | static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); | |
214 | static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5); | |
215 | static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4); | |
216 | static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3); | |
217 | static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); | |
218 | ||
219 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); | |
220 | ||
221 | static int adm1021_attach_adapter(struct i2c_adapter *adapter) | |
222 | { | |
223 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
224 | return 0; | |
225 | return i2c_probe(adapter, &addr_data, adm1021_detect); | |
226 | } | |
227 | ||
228 | static struct attribute *adm1021_attributes[] = { | |
229 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
230 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
231 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
232 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
233 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
234 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
235 | &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, | |
236 | &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, | |
237 | &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, | |
238 | &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, | |
239 | &sensor_dev_attr_temp2_fault.dev_attr.attr, | |
240 | &dev_attr_alarms.attr, | |
241 | NULL | |
242 | }; | |
243 | ||
244 | static const struct attribute_group adm1021_group = { | |
245 | .attrs = adm1021_attributes, | |
246 | }; | |
247 | ||
248 | static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind) | |
249 | { | |
250 | int i; | |
251 | struct i2c_client *client; | |
252 | struct adm1021_data *data; | |
253 | int err = 0; | |
254 | const char *type_name = ""; | |
255 | int conv_rate, status, config; | |
256 | ||
257 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { | |
258 | pr_debug("adm1021: detect failed, " | |
259 | "smbus byte data not supported!\n"); | |
260 | goto error0; | |
261 | } | |
262 | ||
263 | /* OK. For now, we presume we have a valid client. We now create the | |
264 | client structure, even though we cannot fill it completely yet. | |
265 | But it allows us to access adm1021 register values. */ | |
266 | ||
267 | if (!(data = kzalloc(sizeof(struct adm1021_data), GFP_KERNEL))) { | |
268 | pr_debug("adm1021: detect failed, kzalloc failed!\n"); | |
269 | err = -ENOMEM; | |
270 | goto error0; | |
271 | } | |
272 | ||
273 | client = &data->client; | |
274 | i2c_set_clientdata(client, data); | |
275 | client->addr = address; | |
276 | client->adapter = adapter; | |
277 | client->driver = &adm1021_driver; | |
278 | status = i2c_smbus_read_byte_data(client, ADM1021_REG_STATUS); | |
279 | conv_rate = i2c_smbus_read_byte_data(client, | |
280 | ADM1021_REG_CONV_RATE_R); | |
281 | config = i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R); | |
282 | ||
283 | /* Now, we do the remaining detection. */ | |
284 | if (kind < 0) { | |
285 | if ((status & 0x03) != 0x00 || (config & 0x3F) != 0x00 | |
286 | || (conv_rate & 0xF8) != 0x00) { | |
287 | pr_debug("adm1021: detect failed, " | |
288 | "chip not detected!\n"); | |
289 | err = -ENODEV; | |
290 | goto error1; | |
291 | } | |
292 | } | |
293 | ||
294 | /* Determine the chip type. */ | |
295 | if (kind <= 0) { | |
296 | i = i2c_smbus_read_byte_data(client, ADM1021_REG_MAN_ID); | |
297 | if (i == 0x41) | |
298 | if ((i2c_smbus_read_byte_data(client, | |
299 | ADM1021_REG_DEV_ID) & 0xF0) == 0x30) | |
300 | kind = adm1023; | |
301 | else | |
302 | kind = adm1021; | |
303 | else if (i == 0x49) | |
304 | kind = thmc10; | |
305 | else if (i == 0x23) | |
306 | kind = gl523sm; | |
307 | else if ((i == 0x4d) && | |
308 | (i2c_smbus_read_byte_data(client, | |
309 | ADM1021_REG_DEV_ID) == 0x01)) | |
310 | kind = max1617a; | |
311 | else if (i == 0x54) | |
312 | kind = mc1066; | |
313 | /* LM84 Mfr ID in a different place, and it has more unused bits */ | |
314 | else if (conv_rate == 0x00 | |
315 | && (kind == 0 /* skip extra detection */ | |
316 | || ((config & 0x7F) == 0x00 | |
317 | && (status & 0xAB) == 0x00))) | |
318 | kind = lm84; | |
319 | else | |
320 | kind = max1617; | |
321 | } | |
322 | ||
323 | if (kind == max1617) { | |
324 | type_name = "max1617"; | |
325 | } else if (kind == max1617a) { | |
326 | type_name = "max1617a"; | |
327 | } else if (kind == adm1021) { | |
328 | type_name = "adm1021"; | |
329 | } else if (kind == adm1023) { | |
330 | type_name = "adm1023"; | |
331 | } else if (kind == thmc10) { | |
332 | type_name = "thmc10"; | |
333 | } else if (kind == lm84) { | |
334 | type_name = "lm84"; | |
335 | } else if (kind == gl523sm) { | |
336 | type_name = "gl523sm"; | |
337 | } else if (kind == mc1066) { | |
338 | type_name = "mc1066"; | |
339 | } | |
340 | pr_debug("adm1021: Detected chip %s at adapter %d, address 0x%02x.\n", | |
341 | type_name, i2c_adapter_id(adapter), address); | |
342 | ||
343 | /* Fill in the remaining client fields */ | |
344 | strlcpy(client->name, type_name, I2C_NAME_SIZE); | |
345 | data->type = kind; | |
346 | mutex_init(&data->update_lock); | |
347 | ||
348 | /* Tell the I2C layer a new client has arrived */ | |
349 | if ((err = i2c_attach_client(client))) | |
350 | goto error1; | |
351 | ||
352 | /* Initialize the ADM1021 chip */ | |
353 | if (kind != lm84 && !read_only) | |
354 | adm1021_init_client(client); | |
355 | ||
356 | /* Register sysfs hooks */ | |
357 | if ((err = sysfs_create_group(&client->dev.kobj, &adm1021_group))) | |
358 | goto error2; | |
359 | ||
360 | data->hwmon_dev = hwmon_device_register(&client->dev); | |
361 | if (IS_ERR(data->hwmon_dev)) { | |
362 | err = PTR_ERR(data->hwmon_dev); | |
363 | goto error3; | |
364 | } | |
365 | ||
366 | return 0; | |
367 | ||
368 | error3: | |
369 | sysfs_remove_group(&client->dev.kobj, &adm1021_group); | |
370 | error2: | |
371 | i2c_detach_client(client); | |
372 | error1: | |
373 | kfree(data); | |
374 | error0: | |
375 | return err; | |
376 | } | |
377 | ||
378 | static void adm1021_init_client(struct i2c_client *client) | |
379 | { | |
380 | /* Enable ADC and disable suspend mode */ | |
381 | i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W, | |
382 | i2c_smbus_read_byte_data(client, ADM1021_REG_CONFIG_R) & 0xBF); | |
383 | /* Set Conversion rate to 1/sec (this can be tinkered with) */ | |
384 | i2c_smbus_write_byte_data(client, ADM1021_REG_CONV_RATE_W, 0x04); | |
385 | } | |
386 | ||
387 | static int adm1021_detach_client(struct i2c_client *client) | |
388 | { | |
389 | struct adm1021_data *data = i2c_get_clientdata(client); | |
390 | int err; | |
391 | ||
392 | hwmon_device_unregister(data->hwmon_dev); | |
393 | sysfs_remove_group(&client->dev.kobj, &adm1021_group); | |
394 | ||
395 | if ((err = i2c_detach_client(client))) | |
396 | return err; | |
397 | ||
398 | kfree(data); | |
399 | return 0; | |
400 | } | |
401 | ||
402 | static struct adm1021_data *adm1021_update_device(struct device *dev) | |
403 | { | |
404 | struct i2c_client *client = to_i2c_client(dev); | |
405 | struct adm1021_data *data = i2c_get_clientdata(client); | |
406 | ||
407 | mutex_lock(&data->update_lock); | |
408 | ||
409 | if (time_after(jiffies, data->last_updated + HZ + HZ / 2) | |
410 | || !data->valid) { | |
411 | int i; | |
412 | ||
413 | dev_dbg(&client->dev, "Starting adm1021 update\n"); | |
414 | ||
415 | for (i = 0; i < 2; i++) { | |
416 | data->temp[i] = i2c_smbus_read_byte_data(client, | |
417 | ADM1021_REG_TEMP(i)); | |
418 | data->temp_max[i] = i2c_smbus_read_byte_data(client, | |
419 | ADM1021_REG_TOS_R(i)); | |
420 | data->temp_min[i] = i2c_smbus_read_byte_data(client, | |
421 | ADM1021_REG_THYST_R(i)); | |
422 | } | |
423 | data->alarms = i2c_smbus_read_byte_data(client, | |
424 | ADM1021_REG_STATUS) & 0x7c; | |
425 | if (data->type == adm1023) { | |
426 | data->remote_temp_prec = | |
427 | i2c_smbus_read_byte_data(client, | |
428 | ADM1023_REG_REM_TEMP_PREC); | |
429 | data->remote_temp_os_prec = | |
430 | i2c_smbus_read_byte_data(client, | |
431 | ADM1023_REG_REM_TOS_PREC); | |
432 | data->remote_temp_hyst_prec = | |
433 | i2c_smbus_read_byte_data(client, | |
434 | ADM1023_REG_REM_THYST_PREC); | |
435 | data->remote_temp_offset = | |
436 | i2c_smbus_read_byte_data(client, | |
437 | ADM1023_REG_REM_OFFSET); | |
438 | data->remote_temp_offset_prec = | |
439 | i2c_smbus_read_byte_data(client, | |
440 | ADM1023_REG_REM_OFFSET_PREC); | |
441 | } | |
442 | data->last_updated = jiffies; | |
443 | data->valid = 1; | |
444 | } | |
445 | ||
446 | mutex_unlock(&data->update_lock); | |
447 | ||
448 | return data; | |
449 | } | |
450 | ||
451 | static int __init sensors_adm1021_init(void) | |
452 | { | |
453 | return i2c_add_driver(&adm1021_driver); | |
454 | } | |
455 | ||
456 | static void __exit sensors_adm1021_exit(void) | |
457 | { | |
458 | i2c_del_driver(&adm1021_driver); | |
459 | } | |
460 | ||
461 | MODULE_AUTHOR ("Frodo Looijaard <frodol@dds.nl> and " | |
462 | "Philip Edelbrock <phil@netroedge.com>"); | |
463 | MODULE_DESCRIPTION("adm1021 driver"); | |
464 | MODULE_LICENSE("GPL"); | |
465 | ||
466 | module_param(read_only, bool, 0); | |
467 | MODULE_PARM_DESC(read_only, "Don't set any values, read only mode"); | |
468 | ||
469 | module_init(sensors_adm1021_init) | |
470 | module_exit(sensors_adm1021_exit) |