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 */
47static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
48
49enum 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_CLAMP(val) clamp_val(val, -119000, 136000)
90#define TEMP_TO_REG(val) (DIV_ROUND_CLOSEST(TEMP_CLAMP(val), 1000) + 119)
91#define TEMP_FROM_REG(val) (((val) - 119) * 1000)
92
93static inline u8 FAN_TO_REG(long rpm, int div)
94{
95 long rpmdiv;
96 if (rpm == 0)
97 return 0;
98 rpmdiv = clamp_val(rpm, 1, 960000) * div;
99 return clamp_val((480000 + rpmdiv / 2) / rpmdiv, 1, 255);
100}
101#define FAN_FROM_REG(val, div) ((val) == 0 ? 0 : (480000 / ((val) * (div))))
102
103#define IN_CLAMP(val) clamp_val(val, 0, 255 * 19)
104#define IN_TO_REG(val) DIV_ROUND_CLOSEST(IN_CLAMP(val), 19)
105#define IN_FROM_REG(val) ((val) * 19)
106
107#define VDD_CLAMP(val) clamp_val(val, 0, 255 * 95 / 4)
108#define VDD_TO_REG(val) DIV_ROUND_CLOSEST(VDD_CLAMP(val) * 4, 95)
109#define VDD_FROM_REG(val) DIV_ROUND_CLOSEST((val) * 95, 4)
110
111#define DIV_FROM_REG(val) (1 << (val))
112
113#define BEEP_MASK_TO_REG(val) ((val) & 0x7f & data->alarm_mask)
114#define BEEP_MASK_FROM_REG(val) ((val) & 0x7f)
115
116/* Each client has this additional data */
117struct gl518_data {
118 struct i2c_client *client;
119 const struct attribute_group *groups[3];
120 enum chips type;
121
122 struct mutex update_lock;
123 char valid; /* !=0 if following fields are valid */
124 unsigned long last_updated; /* In jiffies */
125
126 u8 voltage_in[4]; /* Register values; [0] = VDD */
127 u8 voltage_min[4]; /* Register values; [0] = VDD */
128 u8 voltage_max[4]; /* Register values; [0] = VDD */
129 u8 fan_in[2];
130 u8 fan_min[2];
131 u8 fan_div[2]; /* Register encoding, shifted right */
132 u8 fan_auto1; /* Boolean */
133 u8 temp_in; /* Register values */
134 u8 temp_max; /* Register values */
135 u8 temp_hyst; /* Register values */
136 u8 alarms; /* Register value */
137 u8 alarm_mask;
138 u8 beep_mask; /* Register value */
139 u8 beep_enable; /* Boolean */
140};
141
142/*
143 * Registers 0x07 to 0x0c are word-sized, others are byte-sized
144 * GL518 uses a high-byte first convention, which is exactly opposite to
145 * the SMBus standard.
146 */
147static int gl518_read_value(struct i2c_client *client, u8 reg)
148{
149 if ((reg >= 0x07) && (reg <= 0x0c))
150 return i2c_smbus_read_word_swapped(client, reg);
151 else
152 return i2c_smbus_read_byte_data(client, reg);
153}
154
155static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value)
156{
157 if ((reg >= 0x07) && (reg <= 0x0c))
158 return i2c_smbus_write_word_swapped(client, reg, value);
159 else
160 return i2c_smbus_write_byte_data(client, reg, value);
161}
162
163static struct gl518_data *gl518_update_device(struct device *dev)
164{
165 struct gl518_data *data = dev_get_drvdata(dev);
166 struct i2c_client *client = data->client;
167 int val;
168
169 mutex_lock(&data->update_lock);
170
171 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
172 || !data->valid) {
173 dev_dbg(&client->dev, "Starting gl518 update\n");
174
175 data->alarms = gl518_read_value(client, GL518_REG_INT);
176 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
177
178 val = gl518_read_value(client, GL518_REG_VDD_LIMIT);
179 data->voltage_min[0] = val & 0xff;
180 data->voltage_max[0] = (val >> 8) & 0xff;
181 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT);
182 data->voltage_min[1] = val & 0xff;
183 data->voltage_max[1] = (val >> 8) & 0xff;
184 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT);
185 data->voltage_min[2] = val & 0xff;
186 data->voltage_max[2] = (val >> 8) & 0xff;
187 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT);
188 data->voltage_min[3] = val & 0xff;
189 data->voltage_max[3] = (val >> 8) & 0xff;
190
191 val = gl518_read_value(client, GL518_REG_FAN_COUNT);
192 data->fan_in[0] = (val >> 8) & 0xff;
193 data->fan_in[1] = val & 0xff;
194
195 val = gl518_read_value(client, GL518_REG_FAN_LIMIT);
196 data->fan_min[0] = (val >> 8) & 0xff;
197 data->fan_min[1] = val & 0xff;
198
199 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN);
200 data->temp_max =
201 gl518_read_value(client, GL518_REG_TEMP_MAX);
202 data->temp_hyst =
203 gl518_read_value(client, GL518_REG_TEMP_HYST);
204
205 val = gl518_read_value(client, GL518_REG_MISC);
206 data->fan_div[0] = (val >> 6) & 0x03;
207 data->fan_div[1] = (val >> 4) & 0x03;
208 data->fan_auto1 = (val >> 3) & 0x01;
209
210 data->alarms &= data->alarm_mask;
211
212 val = gl518_read_value(client, GL518_REG_CONF);
213 data->beep_enable = (val >> 2) & 1;
214
215 if (data->type != gl518sm_r00) {
216 data->voltage_in[0] =
217 gl518_read_value(client, GL518_REG_VDD);
218 data->voltage_in[1] =
219 gl518_read_value(client, GL518_REG_VIN1);
220 data->voltage_in[2] =
221 gl518_read_value(client, GL518_REG_VIN2);
222 }
223 data->voltage_in[3] =
224 gl518_read_value(client, GL518_REG_VIN3);
225
226 data->last_updated = jiffies;
227 data->valid = 1;
228 }
229
230 mutex_unlock(&data->update_lock);
231
232 return data;
233}
234
235/*
236 * Sysfs stuff
237 */
238
239#define show(type, suffix, value) \
240static ssize_t show_##suffix(struct device *dev, \
241 struct device_attribute *attr, char *buf) \
242{ \
243 struct gl518_data *data = gl518_update_device(dev); \
244 return sprintf(buf, "%d\n", type##_FROM_REG(data->value)); \
245}
246
247show(TEMP, temp_input1, temp_in);
248show(TEMP, temp_max1, temp_max);
249show(TEMP, temp_hyst1, temp_hyst);
250show(BOOL, fan_auto1, fan_auto1);
251show(VDD, in_input0, voltage_in[0]);
252show(IN, in_input1, voltage_in[1]);
253show(IN, in_input2, voltage_in[2]);
254show(IN, in_input3, voltage_in[3]);
255show(VDD, in_min0, voltage_min[0]);
256show(IN, in_min1, voltage_min[1]);
257show(IN, in_min2, voltage_min[2]);
258show(IN, in_min3, voltage_min[3]);
259show(VDD, in_max0, voltage_max[0]);
260show(IN, in_max1, voltage_max[1]);
261show(IN, in_max2, voltage_max[2]);
262show(IN, in_max3, voltage_max[3]);
263show(RAW, alarms, alarms);
264show(BOOL, beep_enable, beep_enable);
265show(BEEP_MASK, beep_mask, beep_mask);
266
267static ssize_t fan_input_show(struct device *dev,
268 struct device_attribute *attr, char *buf)
269{
270 int nr = to_sensor_dev_attr(attr)->index;
271 struct gl518_data *data = gl518_update_device(dev);
272 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr],
273 DIV_FROM_REG(data->fan_div[nr])));
274}
275
276static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr,
277 char *buf)
278{
279 int nr = to_sensor_dev_attr(attr)->index;
280 struct gl518_data *data = gl518_update_device(dev);
281 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
282 DIV_FROM_REG(data->fan_div[nr])));
283}
284
285static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr,
286 char *buf)
287{
288 int nr = to_sensor_dev_attr(attr)->index;
289 struct gl518_data *data = gl518_update_device(dev);
290 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
291}
292
293#define set(type, suffix, value, reg) \
294static ssize_t set_##suffix(struct device *dev, \
295 struct device_attribute *attr, \
296 const char *buf, size_t count) \
297{ \
298 struct gl518_data *data = dev_get_drvdata(dev); \
299 struct i2c_client *client = data->client; \
300 long val; \
301 int err = kstrtol(buf, 10, &val); \
302 if (err) \
303 return err; \
304 \
305 mutex_lock(&data->update_lock); \
306 data->value = type##_TO_REG(val); \
307 gl518_write_value(client, reg, data->value); \
308 mutex_unlock(&data->update_lock); \
309 return count; \
310}
311
312#define set_bits(type, suffix, value, reg, mask, shift) \
313static ssize_t set_##suffix(struct device *dev, \
314 struct device_attribute *attr, \
315 const char *buf, size_t count) \
316{ \
317 struct gl518_data *data = dev_get_drvdata(dev); \
318 struct i2c_client *client = data->client; \
319 int regvalue; \
320 unsigned long val; \
321 int err = kstrtoul(buf, 10, &val); \
322 if (err) \
323 return err; \
324 \
325 mutex_lock(&data->update_lock); \
326 regvalue = gl518_read_value(client, reg); \
327 data->value = type##_TO_REG(val); \
328 regvalue = (regvalue & ~mask) | (data->value << shift); \
329 gl518_write_value(client, reg, regvalue); \
330 mutex_unlock(&data->update_lock); \
331 return count; \
332}
333
334#define set_low(type, suffix, value, reg) \
335 set_bits(type, suffix, value, reg, 0x00ff, 0)
336#define set_high(type, suffix, value, reg) \
337 set_bits(type, suffix, value, reg, 0xff00, 8)
338
339set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX);
340set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST);
341set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3);
342set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT);
343set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT);
344set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT);
345set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT);
346set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT);
347set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT);
348set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT);
349set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT);
350set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2);
351set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM);
352
353static ssize_t fan_min_store(struct device *dev,
354 struct device_attribute *attr, const char *buf,
355 size_t count)
356{
357 struct gl518_data *data = dev_get_drvdata(dev);
358 struct i2c_client *client = data->client;
359 int nr = to_sensor_dev_attr(attr)->index;
360 int regvalue;
361 unsigned long val;
362 int err;
363
364 err = kstrtoul(buf, 10, &val);
365 if (err)
366 return err;
367
368 mutex_lock(&data->update_lock);
369 regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT);
370 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
371 regvalue = (regvalue & (0xff << (8 * nr)))
372 | (data->fan_min[nr] << (8 * (1 - nr)));
373 gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue);
374
375 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
376 if (data->fan_min[nr] == 0)
377 data->alarm_mask &= ~(0x20 << nr);
378 else
379 data->alarm_mask |= (0x20 << nr);
380 data->beep_mask &= data->alarm_mask;
381 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
382
383 mutex_unlock(&data->update_lock);
384 return count;
385}
386
387static ssize_t fan_div_store(struct device *dev,
388 struct device_attribute *attr, const char *buf,
389 size_t count)
390{
391 struct gl518_data *data = dev_get_drvdata(dev);
392 struct i2c_client *client = data->client;
393 int nr = to_sensor_dev_attr(attr)->index;
394 int regvalue;
395 unsigned long val;
396 int err;
397
398 err = kstrtoul(buf, 10, &val);
399 if (err)
400 return err;
401
402 switch (val) {
403 case 1:
404 val = 0;
405 break;
406 case 2:
407 val = 1;
408 break;
409 case 4:
410 val = 2;
411 break;
412 case 8:
413 val = 3;
414 break;
415 default:
416 dev_err(dev,
417 "Invalid fan clock divider %lu, choose one of 1, 2, 4 or 8\n",
418 val);
419 return -EINVAL;
420 }
421
422 mutex_lock(&data->update_lock);
423 regvalue = gl518_read_value(client, GL518_REG_MISC);
424 data->fan_div[nr] = val;
425 regvalue = (regvalue & ~(0xc0 >> (2 * nr)))
426 | (data->fan_div[nr] << (6 - 2 * nr));
427 gl518_write_value(client, GL518_REG_MISC, regvalue);
428 mutex_unlock(&data->update_lock);
429 return count;
430}
431
432static DEVICE_ATTR(temp1_input, 0444, show_temp_input1, NULL);
433static DEVICE_ATTR(temp1_max, 0644, show_temp_max1, set_temp_max1);
434static DEVICE_ATTR(temp1_max_hyst, 0644,
435 show_temp_hyst1, set_temp_hyst1);
436static DEVICE_ATTR(fan1_auto, 0644, show_fan_auto1, set_fan_auto1);
437static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0);
438static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1);
439static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
440static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
441static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
442static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
443static DEVICE_ATTR(in0_input, 0444, show_in_input0, NULL);
444static DEVICE_ATTR(in1_input, 0444, show_in_input1, NULL);
445static DEVICE_ATTR(in2_input, 0444, show_in_input2, NULL);
446static DEVICE_ATTR(in3_input, 0444, show_in_input3, NULL);
447static DEVICE_ATTR(in0_min, 0644, show_in_min0, set_in_min0);
448static DEVICE_ATTR(in1_min, 0644, show_in_min1, set_in_min1);
449static DEVICE_ATTR(in2_min, 0644, show_in_min2, set_in_min2);
450static DEVICE_ATTR(in3_min, 0644, show_in_min3, set_in_min3);
451static DEVICE_ATTR(in0_max, 0644, show_in_max0, set_in_max0);
452static DEVICE_ATTR(in1_max, 0644, show_in_max1, set_in_max1);
453static DEVICE_ATTR(in2_max, 0644, show_in_max2, set_in_max2);
454static DEVICE_ATTR(in3_max, 0644, show_in_max3, set_in_max3);
455static DEVICE_ATTR(alarms, 0444, show_alarms, NULL);
456static DEVICE_ATTR(beep_enable, 0644,
457 show_beep_enable, set_beep_enable);
458static DEVICE_ATTR(beep_mask, 0644,
459 show_beep_mask, set_beep_mask);
460
461static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
462 char *buf)
463{
464 int bitnr = to_sensor_dev_attr(attr)->index;
465 struct gl518_data *data = gl518_update_device(dev);
466 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
467}
468
469static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
470static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
471static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
472static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
473static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 4);
474static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 5);
475static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 6);
476
477static ssize_t beep_show(struct device *dev, struct device_attribute *attr,
478 char *buf)
479{
480 int bitnr = to_sensor_dev_attr(attr)->index;
481 struct gl518_data *data = gl518_update_device(dev);
482 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
483}
484
485static ssize_t beep_store(struct device *dev, struct device_attribute *attr,
486 const char *buf, size_t count)
487{
488 struct gl518_data *data = dev_get_drvdata(dev);
489 struct i2c_client *client = data->client;
490 int bitnr = to_sensor_dev_attr(attr)->index;
491 unsigned long bit;
492 int err;
493
494 err = kstrtoul(buf, 10, &bit);
495 if (err)
496 return err;
497
498 if (bit & ~1)
499 return -EINVAL;
500
501 mutex_lock(&data->update_lock);
502 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
503 if (bit)
504 data->beep_mask |= (1 << bitnr);
505 else
506 data->beep_mask &= ~(1 << bitnr);
507 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
508 mutex_unlock(&data->update_lock);
509 return count;
510}
511
512static SENSOR_DEVICE_ATTR_RW(in0_beep, beep, 0);
513static SENSOR_DEVICE_ATTR_RW(in1_beep, beep, 1);
514static SENSOR_DEVICE_ATTR_RW(in2_beep, beep, 2);
515static SENSOR_DEVICE_ATTR_RW(in3_beep, beep, 3);
516static SENSOR_DEVICE_ATTR_RW(temp1_beep, beep, 4);
517static SENSOR_DEVICE_ATTR_RW(fan1_beep, beep, 5);
518static SENSOR_DEVICE_ATTR_RW(fan2_beep, beep, 6);
519
520static struct attribute *gl518_attributes[] = {
521 &dev_attr_in3_input.attr,
522 &dev_attr_in0_min.attr,
523 &dev_attr_in1_min.attr,
524 &dev_attr_in2_min.attr,
525 &dev_attr_in3_min.attr,
526 &dev_attr_in0_max.attr,
527 &dev_attr_in1_max.attr,
528 &dev_attr_in2_max.attr,
529 &dev_attr_in3_max.attr,
530 &sensor_dev_attr_in0_alarm.dev_attr.attr,
531 &sensor_dev_attr_in1_alarm.dev_attr.attr,
532 &sensor_dev_attr_in2_alarm.dev_attr.attr,
533 &sensor_dev_attr_in3_alarm.dev_attr.attr,
534 &sensor_dev_attr_in0_beep.dev_attr.attr,
535 &sensor_dev_attr_in1_beep.dev_attr.attr,
536 &sensor_dev_attr_in2_beep.dev_attr.attr,
537 &sensor_dev_attr_in3_beep.dev_attr.attr,
538
539 &dev_attr_fan1_auto.attr,
540 &sensor_dev_attr_fan1_input.dev_attr.attr,
541 &sensor_dev_attr_fan2_input.dev_attr.attr,
542 &sensor_dev_attr_fan1_min.dev_attr.attr,
543 &sensor_dev_attr_fan2_min.dev_attr.attr,
544 &sensor_dev_attr_fan1_div.dev_attr.attr,
545 &sensor_dev_attr_fan2_div.dev_attr.attr,
546 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
547 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
548 &sensor_dev_attr_fan1_beep.dev_attr.attr,
549 &sensor_dev_attr_fan2_beep.dev_attr.attr,
550
551 &dev_attr_temp1_input.attr,
552 &dev_attr_temp1_max.attr,
553 &dev_attr_temp1_max_hyst.attr,
554 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
555 &sensor_dev_attr_temp1_beep.dev_attr.attr,
556
557 &dev_attr_alarms.attr,
558 &dev_attr_beep_enable.attr,
559 &dev_attr_beep_mask.attr,
560 NULL
561};
562
563static const struct attribute_group gl518_group = {
564 .attrs = gl518_attributes,
565};
566
567static struct attribute *gl518_attributes_r80[] = {
568 &dev_attr_in0_input.attr,
569 &dev_attr_in1_input.attr,
570 &dev_attr_in2_input.attr,
571 NULL
572};
573
574static const struct attribute_group gl518_group_r80 = {
575 .attrs = gl518_attributes_r80,
576};
577
578/*
579 * Real code
580 */
581
582/* Return 0 if detection is successful, -ENODEV otherwise */
583static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info)
584{
585 struct i2c_adapter *adapter = client->adapter;
586 int rev;
587
588 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
589 I2C_FUNC_SMBUS_WORD_DATA))
590 return -ENODEV;
591
592 /* Now, we do the remaining detection. */
593 if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80)
594 || (gl518_read_value(client, GL518_REG_CONF) & 0x80))
595 return -ENODEV;
596
597 /* Determine the chip type. */
598 rev = gl518_read_value(client, GL518_REG_REVISION);
599 if (rev != 0x00 && rev != 0x80)
600 return -ENODEV;
601
602 strlcpy(info->type, "gl518sm", I2C_NAME_SIZE);
603
604 return 0;
605}
606
607/*
608 * Called when we have found a new GL518SM.
609 * Note that we preserve D4:NoFan2 and D2:beep_enable.
610 */
611static void gl518_init_client(struct i2c_client *client)
612{
613 /* Make sure we leave D7:Reset untouched */
614 u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f;
615
616 /* Comparator mode (D3=0), standby mode (D6=0) */
617 gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37));
618
619 /* Never interrupts */
620 gl518_write_value(client, GL518_REG_MASK, 0x00);
621
622 /* Clear status register (D5=1), start (D6=1) */
623 gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue);
624 gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue);
625}
626
627static int gl518_probe(struct i2c_client *client,
628 const struct i2c_device_id *id)
629{
630 struct device *dev = &client->dev;
631 struct device *hwmon_dev;
632 struct gl518_data *data;
633 int revision;
634
635 data = devm_kzalloc(dev, sizeof(struct gl518_data), GFP_KERNEL);
636 if (!data)
637 return -ENOMEM;
638
639 data->client = client;
640 revision = gl518_read_value(client, GL518_REG_REVISION);
641 data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00;
642 mutex_init(&data->update_lock);
643
644 /* Initialize the GL518SM chip */
645 data->alarm_mask = 0xff;
646 gl518_init_client(client);
647
648 /* sysfs hooks */
649 data->groups[0] = &gl518_group;
650 if (data->type == gl518sm_r80)
651 data->groups[1] = &gl518_group_r80;
652
653 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
654 data, data->groups);
655 return PTR_ERR_OR_ZERO(hwmon_dev);
656}
657
658static const struct i2c_device_id gl518_id[] = {
659 { "gl518sm", 0 },
660 { }
661};
662MODULE_DEVICE_TABLE(i2c, gl518_id);
663
664static struct i2c_driver gl518_driver = {
665 .class = I2C_CLASS_HWMON,
666 .driver = {
667 .name = "gl518sm",
668 },
669 .probe = gl518_probe,
670 .id_table = gl518_id,
671 .detect = gl518_detect,
672 .address_list = normal_i2c,
673};
674
675module_i2c_driver(gl518_driver);
676
677MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
678 "Kyosti Malkki <kmalkki@cc.hut.fi> and "
679 "Hong-Gunn Chew <hglinux@gunnet.org>");
680MODULE_DESCRIPTION("GL518SM driver");
681MODULE_LICENSE("GPL");
682