?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
n_tty: Reduce branching in canon_copy_from_read_buf()
[linux/fpc-iii.git] / drivers / hwmon / gl518sm.c
blob0212c8317bca5b33a7620b798e8052ff204af8af
1 /*
2 * gl518sm.c - Part of lm_sensors, Linux kernel modules for hardware
3 * monitoring
4 * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
5 * Kyosti Malkki <kmalkki@cc.hut.fi>
6 * Copyright (C) 2004 Hong-Gunn Chew <hglinux@gunnet.org> and
7 * Jean Delvare <jdelvare@suse.de>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 * Ported to Linux 2.6 by Hong-Gunn Chew with the help of Jean Delvare
24 * and advice of Greg Kroah-Hartman.
25 *
26 * Notes about the port:
27 * Release 0x00 of the GL518SM chipset doesn't support reading of in0,
28 * in1 nor in2. The original driver had an ugly workaround to get them
29 * anyway (changing limits and watching alarms trigger and wear off).
30 * We did not keep that part of the original driver in the Linux 2.6
31 * version, since it was making the driver significantly more complex
32 * with no real benefit.
33 */
34
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/slab.h>
38 #include <linux/jiffies.h>
39 #include <linux/i2c.h>
40 #include <linux/hwmon.h>
41 #include <linux/hwmon-sysfs.h>
42 #include <linux/err.h>
43 #include <linux/mutex.h>
44 #include <linux/sysfs.h>
45
46 /* Addresses to scan */
47 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
48
49 enum chips { gl518sm_r00, gl518sm_r80 };
50
51 /* Many GL518 constants specified below */
52
53 /* The GL518 registers */
54 #define GL518_REG_CHIP_ID 0x00
55 #define GL518_REG_REVISION 0x01
56 #define GL518_REG_VENDOR_ID 0x02
57 #define GL518_REG_CONF 0x03
58 #define GL518_REG_TEMP_IN 0x04
59 #define GL518_REG_TEMP_MAX 0x05
60 #define GL518_REG_TEMP_HYST 0x06
61 #define GL518_REG_FAN_COUNT 0x07
62 #define GL518_REG_FAN_LIMIT 0x08
63 #define GL518_REG_VIN1_LIMIT 0x09
64 #define GL518_REG_VIN2_LIMIT 0x0a
65 #define GL518_REG_VIN3_LIMIT 0x0b
66 #define GL518_REG_VDD_LIMIT 0x0c
67 #define GL518_REG_VIN3 0x0d
68 #define GL518_REG_MISC 0x0f
69 #define GL518_REG_ALARM 0x10
70 #define GL518_REG_MASK 0x11
71 #define GL518_REG_INT 0x12
72 #define GL518_REG_VIN2 0x13
73 #define GL518_REG_VIN1 0x14
74 #define GL518_REG_VDD 0x15
75
76
77 /*
78 * Conversions. Rounding and limit checking is only done on the TO_REG
79 * variants. Note that you should be a bit careful with which arguments
80 * these macros are called: arguments may be evaluated more than once.
81 * Fixing this is just not worth it.
82 */
83
84 #define RAW_FROM_REG(val) val
85
86 #define BOOL_FROM_REG(val) ((val) ? 0 : 1)
87 #define BOOL_TO_REG(val) ((val) ? 0 : 1)
88
89 #define TEMP_TO_REG(val) clamp_val(((((val) < 0 ? \
90 (val) - 500 : \
91 (val) + 500) / 1000) + 119), 0, 255)
92 #define TEMP_FROM_REG(val) (((val) - 119) * 1000)
93
94 static inline u8 FAN_TO_REG(long rpm, int div)
95 {
96 long rpmdiv;
97 if (rpm == 0)
98 return 0;
99 rpmdiv = clamp_val(rpm, 1, 960000) * div;
100 return clamp_val((480000 + rpmdiv / 2) / rpmdiv, 1, 255);
101 }
102 #define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) * (div))))
103
104 #define IN_TO_REG(val) clamp_val((((val) + 9) / 19), 0, 255)
105 #define IN_FROM_REG(val) ((val) * 19)
106
107 #define VDD_TO_REG(val) clamp_val((((val) * 4 + 47) / 95), 0, 255)
108 #define VDD_FROM_REG(val) (((val) * 95 + 2) / 4)
109
110 #define DIV_FROM_REG(val) (1 << (val))
111
112 #define BEEP_MASK_TO_REG(val) ((val) & 0x7f & data->alarm_mask)
113 #define BEEP_MASK_FROM_REG(val) ((val) & 0x7f)
114
115 /* Each client has this additional data */
116 struct gl518_data {
117 struct i2c_client *client;
118 const struct attribute_group *groups[3];
119 enum chips type;
120
121 struct mutex update_lock;
122 char valid; /* !=0 if following fields are valid */
123 unsigned long last_updated; /* In jiffies */
124
125 u8 voltage_in[4]; /* Register values; [0] = VDD */
126 u8 voltage_min[4]; /* Register values; [0] = VDD */
127 u8 voltage_max[4]; /* Register values; [0] = VDD */
128 u8 fan_in[2];
129 u8 fan_min[2];
130 u8 fan_div[2]; /* Register encoding, shifted right */
131 u8 fan_auto1; /* Boolean */
132 u8 temp_in; /* Register values */
133 u8 temp_max; /* Register values */
134 u8 temp_hyst; /* Register values */
135 u8 alarms; /* Register value */
136 u8 alarm_mask;
137 u8 beep_mask; /* Register value */
138 u8 beep_enable; /* Boolean */
139 };
140
141 /*
142 * Registers 0x07 to 0x0c are word-sized, others are byte-sized
143 * GL518 uses a high-byte first convention, which is exactly opposite to
144 * the SMBus standard.
145 */
146 static int gl518_read_value(struct i2c_client *client, u8 reg)
147 {
148 if ((reg >= 0x07) && (reg <= 0x0c))
149 return i2c_smbus_read_word_swapped(client, reg);
150 else
151 return i2c_smbus_read_byte_data(client, reg);
152 }
153
154 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value)
155 {
156 if ((reg >= 0x07) && (reg <= 0x0c))
157 return i2c_smbus_write_word_swapped(client, reg, value);
158 else
159 return i2c_smbus_write_byte_data(client, reg, value);
160 }
161
162 static struct gl518_data *gl518_update_device(struct device *dev)
163 {
164 struct gl518_data *data = dev_get_drvdata(dev);
165 struct i2c_client *client = data->client;
166 int val;
167
168 mutex_lock(&data->update_lock);
169
170 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
171 || !data->valid) {
172 dev_dbg(&client->dev, "Starting gl518 update\n");
173
174 data->alarms = gl518_read_value(client, GL518_REG_INT);
175 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
176
177 val = gl518_read_value(client, GL518_REG_VDD_LIMIT);
178 data->voltage_min[0] = val & 0xff;
179 data->voltage_max[0] = (val >> 8) & 0xff;
180 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT);
181 data->voltage_min[1] = val & 0xff;
182 data->voltage_max[1] = (val >> 8) & 0xff;
183 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT);
184 data->voltage_min[2] = val & 0xff;
185 data->voltage_max[2] = (val >> 8) & 0xff;
186 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT);
187 data->voltage_min[3] = val & 0xff;
188 data->voltage_max[3] = (val >> 8) & 0xff;
189
190 val = gl518_read_value(client, GL518_REG_FAN_COUNT);
191 data->fan_in[0] = (val >> 8) & 0xff;
192 data->fan_in[1] = val & 0xff;
193
194 val = gl518_read_value(client, GL518_REG_FAN_LIMIT);
195 data->fan_min[0] = (val >> 8) & 0xff;
196 data->fan_min[1] = val & 0xff;
197
198 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN);
199 data->temp_max =
200 gl518_read_value(client, GL518_REG_TEMP_MAX);
201 data->temp_hyst =
202 gl518_read_value(client, GL518_REG_TEMP_HYST);
203
204 val = gl518_read_value(client, GL518_REG_MISC);
205 data->fan_div[0] = (val >> 6) & 0x03;
206 data->fan_div[1] = (val >> 4) & 0x03;
207 data->fan_auto1 = (val >> 3) & 0x01;
208
209 data->alarms &= data->alarm_mask;
210
211 val = gl518_read_value(client, GL518_REG_CONF);
212 data->beep_enable = (val >> 2) & 1;
213
214 if (data->type != gl518sm_r00) {
215 data->voltage_in[0] =
216 gl518_read_value(client, GL518_REG_VDD);
217 data->voltage_in[1] =
218 gl518_read_value(client, GL518_REG_VIN1);
219 data->voltage_in[2] =
220 gl518_read_value(client, GL518_REG_VIN2);
221 }
222 data->voltage_in[3] =
223 gl518_read_value(client, GL518_REG_VIN3);
224
225 data->last_updated = jiffies;
226 data->valid = 1;
227 }
228
229 mutex_unlock(&data->update_lock);
230
231 return data;
232 }
233
234 /*
235 * Sysfs stuff
236 */
237
238 #define show(type, suffix, value) \
239 static ssize_t show_##suffix(struct device *dev, \
240 struct device_attribute *attr, char *buf) \
241 { \
242 struct gl518_data *data = gl518_update_device(dev); \
243 return sprintf(buf, "%d\n", type##_FROM_REG(data->value)); \
244 }
245
246 show(TEMP, temp_input1, temp_in);
247 show(TEMP, temp_max1, temp_max);
248 show(TEMP, temp_hyst1, temp_hyst);
249 show(BOOL, fan_auto1, fan_auto1);
250 show(VDD, in_input0, voltage_in[0]);
251 show(IN, in_input1, voltage_in[1]);
252 show(IN, in_input2, voltage_in[2]);
253 show(IN, in_input3, voltage_in[3]);
254 show(VDD, in_min0, voltage_min[0]);
255 show(IN, in_min1, voltage_min[1]);
256 show(IN, in_min2, voltage_min[2]);
257 show(IN, in_min3, voltage_min[3]);
258 show(VDD, in_max0, voltage_max[0]);
259 show(IN, in_max1, voltage_max[1]);
260 show(IN, in_max2, voltage_max[2]);
261 show(IN, in_max3, voltage_max[3]);
262 show(RAW, alarms, alarms);
263 show(BOOL, beep_enable, beep_enable);
264 show(BEEP_MASK, beep_mask, beep_mask);
265
266 static ssize_t show_fan_input(struct device *dev,
267 struct device_attribute *attr, char *buf)
268 {
269 int nr = to_sensor_dev_attr(attr)->index;
270 struct gl518_data *data = gl518_update_device(dev);
271 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr],
272 DIV_FROM_REG(data->fan_div[nr])));
273 }
274
275 static ssize_t show_fan_min(struct device *dev,
276 struct device_attribute *attr, char *buf)
277 {
278 int nr = to_sensor_dev_attr(attr)->index;
279 struct gl518_data *data = gl518_update_device(dev);
280 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
281 DIV_FROM_REG(data->fan_div[nr])));
282 }
283
284 static ssize_t show_fan_div(struct device *dev,
285 struct device_attribute *attr, char *buf)
286 {
287 int nr = to_sensor_dev_attr(attr)->index;
288 struct gl518_data *data = gl518_update_device(dev);
289 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
290 }
291
292 #define set(type, suffix, value, reg) \
293 static ssize_t set_##suffix(struct device *dev, \
294 struct device_attribute *attr, \
295 const char *buf, size_t count) \
296 { \
297 struct gl518_data *data = dev_get_drvdata(dev); \
298 struct i2c_client *client = data->client; \
299 long val; \
300 int err = kstrtol(buf, 10, &val); \
301 if (err) \
302 return err; \
303 \
304 mutex_lock(&data->update_lock); \
305 data->value = type##_TO_REG(val); \
306 gl518_write_value(client, reg, data->value); \
307 mutex_unlock(&data->update_lock); \
308 return count; \
309 }
310
311 #define set_bits(type, suffix, value, reg, mask, shift) \
312 static ssize_t set_##suffix(struct device *dev, \
313 struct device_attribute *attr, \
314 const char *buf, size_t count) \
315 { \
316 struct gl518_data *data = dev_get_drvdata(dev); \
317 struct i2c_client *client = data->client; \
318 int regvalue; \
319 unsigned long val; \
320 int err = kstrtoul(buf, 10, &val); \
321 if (err) \
322 return err; \
323 \
324 mutex_lock(&data->update_lock); \
325 regvalue = gl518_read_value(client, reg); \
326 data->value = type##_TO_REG(val); \
327 regvalue = (regvalue & ~mask) | (data->value << shift); \
328 gl518_write_value(client, reg, regvalue); \
329 mutex_unlock(&data->update_lock); \
330 return count; \
331 }
332
333 #define set_low(type, suffix, value, reg) \
334 set_bits(type, suffix, value, reg, 0x00ff, 0)
335 #define set_high(type, suffix, value, reg) \
336 set_bits(type, suffix, value, reg, 0xff00, 8)
337
338 set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX);
339 set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST);
340 set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3);
341 set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT);
342 set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT);
343 set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT);
344 set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT);
345 set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT);
346 set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT);
347 set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT);
348 set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT);
349 set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2);
350 set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM);
351
352 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
353 const char *buf, size_t count)
354 {
355 struct gl518_data *data = dev_get_drvdata(dev);
356 struct i2c_client *client = data->client;
357 int nr = to_sensor_dev_attr(attr)->index;
358 int regvalue;
359 unsigned long val;
360 int err;
361
362 err = kstrtoul(buf, 10, &val);
363 if (err)
364 return err;
365
366 mutex_lock(&data->update_lock);
367 regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT);
368 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
369 regvalue = (regvalue & (0xff << (8 * nr)))
370 | (data->fan_min[nr] << (8 * (1 - nr)));
371 gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue);
372
373 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
374 if (data->fan_min[nr] == 0)
375 data->alarm_mask &= ~(0x20 << nr);
376 else
377 data->alarm_mask |= (0x20 << nr);
378 data->beep_mask &= data->alarm_mask;
379 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
380
381 mutex_unlock(&data->update_lock);
382 return count;
383 }
384
385 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
386 const char *buf, size_t count)
387 {
388 struct gl518_data *data = dev_get_drvdata(dev);
389 struct i2c_client *client = data->client;
390 int nr = to_sensor_dev_attr(attr)->index;
391 int regvalue;
392 unsigned long val;
393 int err;
394
395 err = kstrtoul(buf, 10, &val);
396 if (err)
397 return err;
398
399 switch (val) {
400 case 1:
401 val = 0;
402 break;
403 case 2:
404 val = 1;
405 break;
406 case 4:
407 val = 2;
408 break;
409 case 8:
410 val = 3;
411 break;
412 default:
413 dev_err(dev,
414 "Invalid fan clock divider %lu, choose one of 1, 2, 4 or 8\n",
415 val);
416 return -EINVAL;
417 }
418
419 mutex_lock(&data->update_lock);
420 regvalue = gl518_read_value(client, GL518_REG_MISC);
421 data->fan_div[nr] = val;
422 regvalue = (regvalue & ~(0xc0 >> (2 * nr)))
423 | (data->fan_div[nr] << (6 - 2 * nr));
424 gl518_write_value(client, GL518_REG_MISC, regvalue);
425 mutex_unlock(&data->update_lock);
426 return count;
427 }
428
429 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
430 static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1);
431 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO,
432 show_temp_hyst1, set_temp_hyst1);
433 static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1);
434 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
435 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
436 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO,
437 show_fan_min, set_fan_min, 0);
438 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO,
439 show_fan_min, set_fan_min, 1);
440 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO,
441 show_fan_div, set_fan_div, 0);
442 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO,
443 show_fan_div, set_fan_div, 1);
444 static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
445 static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
446 static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
447 static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
448 static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0);
449 static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1);
450 static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2);
451 static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3);
452 static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0);
453 static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1);
454 static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2);
455 static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3);
456 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
457 static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO,
458 show_beep_enable, set_beep_enable);
459 static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO,
460 show_beep_mask, set_beep_mask);
461
462 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
463 char *buf)
464 {
465 int bitnr = to_sensor_dev_attr(attr)->index;
466 struct gl518_data *data = gl518_update_device(dev);
467 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
468 }
469
470 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
471 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
472 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
473 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
474 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
475 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5);
476 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6);
477
478 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
479 char *buf)
480 {
481 int bitnr = to_sensor_dev_attr(attr)->index;
482 struct gl518_data *data = gl518_update_device(dev);
483 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
484 }
485
486 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
487 const char *buf, size_t count)
488 {
489 struct gl518_data *data = dev_get_drvdata(dev);
490 struct i2c_client *client = data->client;
491 int bitnr = to_sensor_dev_attr(attr)->index;
492 unsigned long bit;
493 int err;
494
495 err = kstrtoul(buf, 10, &bit);
496 if (err)
497 return err;
498
499 if (bit & ~1)
500 return -EINVAL;
501
502 mutex_lock(&data->update_lock);
503 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
504 if (bit)
505 data->beep_mask |= (1 << bitnr);
506 else
507 data->beep_mask &= ~(1 << bitnr);
508 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
509 mutex_unlock(&data->update_lock);
510 return count;
511 }
512
513 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0);
514 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1);
515 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2);
516 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3);
517 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4);
518 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5);
519 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6);
520
521 static struct attribute *gl518_attributes[] = {
522 &dev_attr_in3_input.attr,
523 &dev_attr_in0_min.attr,
524 &dev_attr_in1_min.attr,
525 &dev_attr_in2_min.attr,
526 &dev_attr_in3_min.attr,
527 &dev_attr_in0_max.attr,
528 &dev_attr_in1_max.attr,
529 &dev_attr_in2_max.attr,
530 &dev_attr_in3_max.attr,
531 &sensor_dev_attr_in0_alarm.dev_attr.attr,
532 &sensor_dev_attr_in1_alarm.dev_attr.attr,
533 &sensor_dev_attr_in2_alarm.dev_attr.attr,
534 &sensor_dev_attr_in3_alarm.dev_attr.attr,
535 &sensor_dev_attr_in0_beep.dev_attr.attr,
536 &sensor_dev_attr_in1_beep.dev_attr.attr,
537 &sensor_dev_attr_in2_beep.dev_attr.attr,
538 &sensor_dev_attr_in3_beep.dev_attr.attr,
539
540 &dev_attr_fan1_auto.attr,
541 &sensor_dev_attr_fan1_input.dev_attr.attr,
542 &sensor_dev_attr_fan2_input.dev_attr.attr,
543 &sensor_dev_attr_fan1_min.dev_attr.attr,
544 &sensor_dev_attr_fan2_min.dev_attr.attr,
545 &sensor_dev_attr_fan1_div.dev_attr.attr,
546 &sensor_dev_attr_fan2_div.dev_attr.attr,
547 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
548 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
549 &sensor_dev_attr_fan1_beep.dev_attr.attr,
550 &sensor_dev_attr_fan2_beep.dev_attr.attr,
551
552 &dev_attr_temp1_input.attr,
553 &dev_attr_temp1_max.attr,
554 &dev_attr_temp1_max_hyst.attr,
555 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
556 &sensor_dev_attr_temp1_beep.dev_attr.attr,
557
558 &dev_attr_alarms.attr,
559 &dev_attr_beep_enable.attr,
560 &dev_attr_beep_mask.attr,
561 NULL
562 };
563
564 static const struct attribute_group gl518_group = {
565 .attrs = gl518_attributes,
566 };
567
568 static struct attribute *gl518_attributes_r80[] = {
569 &dev_attr_in0_input.attr,
570 &dev_attr_in1_input.attr,
571 &dev_attr_in2_input.attr,
572 NULL
573 };
574
575 static const struct attribute_group gl518_group_r80 = {
576 .attrs = gl518_attributes_r80,
577 };
578
579 /*
580 * Real code
581 */
582
583 /* Return 0 if detection is successful, -ENODEV otherwise */
584 static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info)
585 {
586 struct i2c_adapter *adapter = client->adapter;
587 int rev;
588
589 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
590 I2C_FUNC_SMBUS_WORD_DATA))
591 return -ENODEV;
592
593 /* Now, we do the remaining detection. */
594 if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80)
595 || (gl518_read_value(client, GL518_REG_CONF) & 0x80))
596 return -ENODEV;
597
598 /* Determine the chip type. */
599 rev = gl518_read_value(client, GL518_REG_REVISION);
600 if (rev != 0x00 && rev != 0x80)
601 return -ENODEV;
602
603 strlcpy(info->type, "gl518sm", I2C_NAME_SIZE);
604
605 return 0;
606 }
607
608 /*
609 * Called when we have found a new GL518SM.
610 * Note that we preserve D4:NoFan2 and D2:beep_enable.
611 */
612 static void gl518_init_client(struct i2c_client *client)
613 {
614 /* Make sure we leave D7:Reset untouched */
615 u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f;
616
617 /* Comparator mode (D3=0), standby mode (D6=0) */
618 gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37));
619
620 /* Never interrupts */
621 gl518_write_value(client, GL518_REG_MASK, 0x00);
622
623 /* Clear status register (D5=1), start (D6=1) */
624 gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue);
625 gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue);
626 }
627
628 static int gl518_probe(struct i2c_client *client,
629 const struct i2c_device_id *id)
630 {
631 struct device *dev = &client->dev;
632 struct device *hwmon_dev;
633 struct gl518_data *data;
634 int revision;
635
636 data = devm_kzalloc(dev, sizeof(struct gl518_data), GFP_KERNEL);
637 if (!data)
638 return -ENOMEM;
639
640 data->client = client;
641 revision = gl518_read_value(client, GL518_REG_REVISION);
642 data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00;
643 mutex_init(&data->update_lock);
644
645 /* Initialize the GL518SM chip */
646 data->alarm_mask = 0xff;
647 gl518_init_client(client);
648
649 /* sysfs hooks */
650 data->groups[0] = &gl518_group;
651 if (data->type == gl518sm_r80)
652 data->groups[1] = &gl518_group_r80;
653
654 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
655 data, data->groups);
656 return PTR_ERR_OR_ZERO(hwmon_dev);
657 }
658
659 static const struct i2c_device_id gl518_id[] = {
660 { "gl518sm", 0 },
661 { }
662 };
663 MODULE_DEVICE_TABLE(i2c, gl518_id);
664
665 static struct i2c_driver gl518_driver = {
666 .class = I2C_CLASS_HWMON,
667 .driver = {
668 .name = "gl518sm",
669 },
670 .probe = gl518_probe,
671 .id_table = gl518_id,
672 .detect = gl518_detect,
673 .address_list = normal_i2c,
674 };
675
676 module_i2c_driver(gl518_driver);
677
678 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
679 "Kyosti Malkki <kmalkki@cc.hut.fi> and "
680 "Hong-Gunn Chew <hglinux@gunnet.org>");
681 MODULE_DESCRIPTION("GL518SM driver");
682 MODULE_LICENSE("GPL");
Linux with added FPC-III support