hwmon: (adt7473) Remove unused defines
[linux-2.6.git] / drivers / hwmon / thmc50.c
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 */
35 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
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
49 /*
50  * The mirror status register cannot be used as
51  * reading it does not clear alarms.
52  */
53 #define THMC50_REG_INTR                         0x41
54
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 };
58
59 #define THMC50_REG_CONF_nFANOFF                 0x20
60
61 /* Each client has this additional data */
62 struct thmc50_data {
63         struct i2c_client client;
64         struct device *hwmon_dev;
65
66         struct mutex update_lock;
67         enum chips type;
68         unsigned long last_updated;     /* In jiffies */
69         char has_temp3;         /* !=0 if it is ADM1022 in temp3 mode */
70         char valid;             /* !=0 if following fields are valid */
71
72         /* Register values */
73         s8 temp_input[3];
74         s8 temp_max[3];
75         s8 temp_min[3];
76         u8 analog_out;
77         u8 alarms;
78 };
79
80 static int thmc50_attach_adapter(struct i2c_adapter *adapter);
81 static int thmc50_detach_client(struct i2c_client *client);
82 static void thmc50_init_client(struct i2c_client *client);
83 static struct thmc50_data *thmc50_update_device(struct device *dev);
84
85 static struct i2c_driver thmc50_driver = {
86         .driver = {
87                 .name = "thmc50",
88         },
89         .attach_adapter = thmc50_attach_adapter,
90         .detach_client = thmc50_detach_client,
91 };
92
93 static ssize_t show_analog_out(struct device *dev,
94                                struct device_attribute *attr, char *buf)
95 {
96         struct thmc50_data *data = thmc50_update_device(dev);
97         return sprintf(buf, "%d\n", data->analog_out);
98 }
99
100 static ssize_t set_analog_out(struct device *dev,
101                               struct device_attribute *attr,
102                               const char *buf, size_t count)
103 {
104         struct i2c_client *client = to_i2c_client(dev);
105         struct thmc50_data *data = i2c_get_clientdata(client);
106         int tmp = simple_strtoul(buf, NULL, 10);
107         int config;
108
109         mutex_lock(&data->update_lock);
110         data->analog_out = SENSORS_LIMIT(tmp, 0, 255);
111         i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
112                                   data->analog_out);
113
114         config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
115         if (data->analog_out == 0)
116                 config &= ~THMC50_REG_CONF_nFANOFF;
117         else
118                 config |= THMC50_REG_CONF_nFANOFF;
119         i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
120
121         mutex_unlock(&data->update_lock);
122         return count;
123 }
124
125 /* There is only one PWM mode = DC */
126 static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr,
127                              char *buf)
128 {
129         return sprintf(buf, "0\n");
130 }
131
132 /* Temperatures */
133 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
134                          char *buf)
135 {
136         int nr = to_sensor_dev_attr(attr)->index;
137         struct thmc50_data *data = thmc50_update_device(dev);
138         return sprintf(buf, "%d\n", data->temp_input[nr] * 1000);
139 }
140
141 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
142                              char *buf)
143 {
144         int nr = to_sensor_dev_attr(attr)->index;
145         struct thmc50_data *data = thmc50_update_device(dev);
146         return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
147 }
148
149 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
150                             const char *buf, size_t count)
151 {
152         int nr = to_sensor_dev_attr(attr)->index;
153         struct i2c_client *client = to_i2c_client(dev);
154         struct thmc50_data *data = i2c_get_clientdata(client);
155         int val = simple_strtol(buf, NULL, 10);
156
157         mutex_lock(&data->update_lock);
158         data->temp_min[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
159         i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
160                                   data->temp_min[nr]);
161         mutex_unlock(&data->update_lock);
162         return count;
163 }
164
165 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
166                              char *buf)
167 {
168         int nr = to_sensor_dev_attr(attr)->index;
169         struct thmc50_data *data = thmc50_update_device(dev);
170         return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
171 }
172
173 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
174                             const char *buf, size_t count)
175 {
176         int nr = to_sensor_dev_attr(attr)->index;
177         struct i2c_client *client = to_i2c_client(dev);
178         struct thmc50_data *data = i2c_get_clientdata(client);
179         int val = simple_strtol(buf, NULL, 10);
180
181         mutex_lock(&data->update_lock);
182         data->temp_max[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
183         i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
184                                   data->temp_max[nr]);
185         mutex_unlock(&data->update_lock);
186         return count;
187 }
188
189 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
190                           char *buf)
191 {
192         int index = to_sensor_dev_attr(attr)->index;
193         struct thmc50_data *data = thmc50_update_device(dev);
194
195         return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
196 }
197
198 #define temp_reg(offset)                                                \
199 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp,     \
200                         NULL, offset - 1);                              \
201 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR,        \
202                         show_temp_min, set_temp_min, offset - 1);       \
203 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR,        \
204                         show_temp_max, set_temp_max, offset - 1);
205
206 temp_reg(1);
207 temp_reg(2);
208 temp_reg(3);
209
210 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0);
211 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
212 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1);
213 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7);
214 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);
215
216 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_analog_out,
217                           set_analog_out, 0);
218 static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
219
220 static struct attribute *thmc50_attributes[] = {
221         &sensor_dev_attr_temp1_max.dev_attr.attr,
222         &sensor_dev_attr_temp1_min.dev_attr.attr,
223         &sensor_dev_attr_temp1_input.dev_attr.attr,
224         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
225         &sensor_dev_attr_temp2_max.dev_attr.attr,
226         &sensor_dev_attr_temp2_min.dev_attr.attr,
227         &sensor_dev_attr_temp2_input.dev_attr.attr,
228         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
229         &sensor_dev_attr_temp2_fault.dev_attr.attr,
230         &sensor_dev_attr_pwm1.dev_attr.attr,
231         &sensor_dev_attr_pwm1_mode.dev_attr.attr,
232         NULL
233 };
234
235 static const struct attribute_group thmc50_group = {
236         .attrs = thmc50_attributes,
237 };
238
239 /* for ADM1022 3rd temperature mode */
240 static struct attribute *temp3_attributes[] = {
241         &sensor_dev_attr_temp3_max.dev_attr.attr,
242         &sensor_dev_attr_temp3_min.dev_attr.attr,
243         &sensor_dev_attr_temp3_input.dev_attr.attr,
244         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
245         &sensor_dev_attr_temp3_fault.dev_attr.attr,
246         NULL
247 };
248
249 static const struct attribute_group temp3_group = {
250         .attrs = temp3_attributes,
251 };
252
253 static int thmc50_detect(struct i2c_adapter *adapter, int address, int kind)
254 {
255         unsigned company;
256         unsigned revision;
257         unsigned config;
258         struct i2c_client *client;
259         struct thmc50_data *data;
260         struct device *dev;
261         int err = 0;
262         const char *type_name;
263
264         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
265                 pr_debug("thmc50: detect failed, "
266                          "smbus byte data not supported!\n");
267                 goto exit;
268         }
269
270         /* OK. For now, we presume we have a valid client. We now create the
271            client structure, even though we cannot fill it completely yet.
272            But it allows us to access thmc50 registers. */
273         if (!(data = kzalloc(sizeof(struct thmc50_data), GFP_KERNEL))) {
274                 pr_debug("thmc50: detect failed, kzalloc failed!\n");
275                 err = -ENOMEM;
276                 goto exit;
277         }
278
279         client = &data->client;
280         i2c_set_clientdata(client, data);
281         client->addr = address;
282         client->adapter = adapter;
283         client->driver = &thmc50_driver;
284         dev = &client->dev;
285
286         pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
287                  client->addr, i2c_adapter_id(client->adapter));
288
289         /* Now, we do the remaining detection. */
290         company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
291         revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
292         config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
293
294         if (kind == 0)
295                 kind = thmc50;
296         else if (kind < 0) {
297                 err = -ENODEV;
298                 if (revision >= 0xc0 && ((config & 0x10) == 0)) {
299                         if (company == 0x49) {
300                                 kind = thmc50;
301                                 err = 0;
302                         } else if (company == 0x41) {
303                                 kind = adm1022;
304                                 err = 0;
305                         }
306                 }
307         }
308         if (err == -ENODEV) {
309                 pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
310                 goto exit_free;
311         }
312         data->type = kind;
313
314         if (kind == adm1022) {
315                 int id = i2c_adapter_id(client->adapter);
316                 int i;
317
318                 type_name = "adm1022";
319                 data->has_temp3 = (config >> 7) & 1;    /* config MSB */
320                 for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
321                         if (adm1022_temp3[i] == id &&
322                             adm1022_temp3[i + 1] == address) {
323                                 /* enable 2nd remote temp */
324                                 data->has_temp3 = 1;
325                                 break;
326                         }
327         } else {
328                 type_name = "thmc50";
329         }
330         pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
331                  type_name, (revision >> 4) - 0xc, revision & 0xf);
332
333         /* Fill in the remaining client fields & put it into the global list */
334         strlcpy(client->name, type_name, I2C_NAME_SIZE);
335         mutex_init(&data->update_lock);
336
337         /* Tell the I2C layer a new client has arrived */
338         if ((err = i2c_attach_client(client)))
339                 goto exit_free;
340
341         thmc50_init_client(client);
342
343         /* Register sysfs hooks */
344         if ((err = sysfs_create_group(&client->dev.kobj, &thmc50_group)))
345                 goto exit_detach;
346
347         /* Register ADM1022 sysfs hooks */
348         if (data->has_temp3)
349                 if ((err = sysfs_create_group(&client->dev.kobj,
350                                               &temp3_group)))
351                         goto exit_remove_sysfs_thmc50;
352
353         /* Register a new directory entry with module sensors */
354         data->hwmon_dev = hwmon_device_register(&client->dev);
355         if (IS_ERR(data->hwmon_dev)) {
356                 err = PTR_ERR(data->hwmon_dev);
357                 goto exit_remove_sysfs;
358         }
359
360         return 0;
361
362 exit_remove_sysfs:
363         if (data->has_temp3)
364                 sysfs_remove_group(&client->dev.kobj, &temp3_group);
365 exit_remove_sysfs_thmc50:
366         sysfs_remove_group(&client->dev.kobj, &thmc50_group);
367 exit_detach:
368         i2c_detach_client(client);
369 exit_free:
370         kfree(data);
371 exit:
372         return err;
373 }
374
375 static int thmc50_attach_adapter(struct i2c_adapter *adapter)
376 {
377         if (!(adapter->class & I2C_CLASS_HWMON))
378                 return 0;
379         return i2c_probe(adapter, &addr_data, thmc50_detect);
380 }
381
382 static int thmc50_detach_client(struct i2c_client *client)
383 {
384         struct thmc50_data *data = i2c_get_clientdata(client);
385         int err;
386
387         hwmon_device_unregister(data->hwmon_dev);
388         sysfs_remove_group(&client->dev.kobj, &thmc50_group);
389         if (data->has_temp3)
390                 sysfs_remove_group(&client->dev.kobj, &temp3_group);
391
392         if ((err = i2c_detach_client(client)))
393                 return err;
394
395         kfree(data);
396
397         return 0;
398 }
399
400 static void thmc50_init_client(struct i2c_client *client)
401 {
402         struct thmc50_data *data = i2c_get_clientdata(client);
403         int config;
404
405         data->analog_out = i2c_smbus_read_byte_data(client,
406                                                     THMC50_REG_ANALOG_OUT);
407         /* set up to at least 1 */
408         if (data->analog_out == 0) {
409                 data->analog_out = 1;
410                 i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
411                                           data->analog_out);
412         }
413         config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
414         config |= 0x1;  /* start the chip if it is in standby mode */
415         if (data->has_temp3)
416                 config |= 0x80;         /* enable 2nd remote temp */
417         i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
418 }
419
420 static struct thmc50_data *thmc50_update_device(struct device *dev)
421 {
422         struct i2c_client *client = to_i2c_client(dev);
423         struct thmc50_data *data = i2c_get_clientdata(client);
424         int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);
425
426         mutex_lock(&data->update_lock);
427
428         if (time_after(jiffies, data->last_updated + timeout)
429             || !data->valid) {
430
431                 int temps = data->has_temp3 ? 3 : 2;
432                 int i;
433                 for (i = 0; i < temps; i++) {
434                         data->temp_input[i] = i2c_smbus_read_byte_data(client,
435                                                 THMC50_REG_TEMP[i]);
436                         data->temp_max[i] = i2c_smbus_read_byte_data(client,
437                                                 THMC50_REG_TEMP_MAX[i]);
438                         data->temp_min[i] = i2c_smbus_read_byte_data(client,
439                                                 THMC50_REG_TEMP_MIN[i]);
440                 }
441                 data->analog_out =
442                     i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
443                 data->alarms =
444                     i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
445                 data->last_updated = jiffies;
446                 data->valid = 1;
447         }
448
449         mutex_unlock(&data->update_lock);
450
451         return data;
452 }
453
454 static int __init sm_thmc50_init(void)
455 {
456         return i2c_add_driver(&thmc50_driver);
457 }
458
459 static void __exit sm_thmc50_exit(void)
460 {
461         i2c_del_driver(&thmc50_driver);
462 }
463
464 MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
465 MODULE_DESCRIPTION("THMC50 driver");
466
467 module_init(sm_thmc50_init);
468 module_exit(sm_thmc50_exit);