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_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
FAN_TO_REG(long rpm,int div)93 static 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 */
117 struct 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 */
gl518_read_value(struct i2c_client * client,u8 reg)147 static 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
gl518_write_value(struct i2c_client * client,u8 reg,u16 value)155 static 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
gl518_update_device(struct device * dev)163 static 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) \
240 static 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
247 show(TEMP, temp_input1, temp_in);
248 show(TEMP, temp_max1, temp_max);
249 show(TEMP, temp_hyst1, temp_hyst);
250 show(BOOL, fan_auto1, fan_auto1);
251 show(VDD, in_input0, voltage_in[0]);
252 show(IN, in_input1, voltage_in[1]);
253 show(IN, in_input2, voltage_in[2]);
254 show(IN, in_input3, voltage_in[3]);
255 show(VDD, in_min0, voltage_min[0]);
256 show(IN, in_min1, voltage_min[1]);
257 show(IN, in_min2, voltage_min[2]);
258 show(IN, in_min3, voltage_min[3]);
259 show(VDD, in_max0, voltage_max[0]);
260 show(IN, in_max1, voltage_max[1]);
261 show(IN, in_max2, voltage_max[2]);
262 show(IN, in_max3, voltage_max[3]);
263 show(RAW, alarms, alarms);
264 show(BOOL, beep_enable, beep_enable);
265 show(BEEP_MASK, beep_mask, beep_mask);
266
show_fan_input(struct device * dev,struct device_attribute * attr,char * buf)267 static ssize_t show_fan_input(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
show_fan_min(struct device * dev,struct device_attribute * attr,char * buf)276 static ssize_t show_fan_min(struct device *dev,
277 struct device_attribute *attr, 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
show_fan_div(struct device * dev,struct device_attribute * attr,char * buf)285 static ssize_t show_fan_div(struct device *dev,
286 struct device_attribute *attr, 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) \
294 static 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) \
313 static 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
339 set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX);
340 set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST);
341 set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3);
342 set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT);
343 set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT);
344 set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT);
345 set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT);
346 set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT);
347 set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT);
348 set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT);
349 set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT);
350 set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2);
351 set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM);
352
set_fan_min(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)353 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
354 const char *buf, size_t count)
355 {
356 struct gl518_data *data = dev_get_drvdata(dev);
357 struct i2c_client *client = data->client;
358 int nr = to_sensor_dev_attr(attr)->index;
359 int regvalue;
360 unsigned long val;
361 int err;
362
363 err = kstrtoul(buf, 10, &val);
364 if (err)
365 return err;
366
367 mutex_lock(&data->update_lock);
368 regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT);
369 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
370 regvalue = (regvalue & (0xff << (8 * nr)))
371 | (data->fan_min[nr] << (8 * (1 - nr)));
372 gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue);
373
374 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
375 if (data->fan_min[nr] == 0)
376 data->alarm_mask &= ~(0x20 << nr);
377 else
378 data->alarm_mask |= (0x20 << nr);
379 data->beep_mask &= data->alarm_mask;
380 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
381
382 mutex_unlock(&data->update_lock);
383 return count;
384 }
385
set_fan_div(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)386 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
387 const char *buf, size_t count)
388 {
389 struct gl518_data *data = dev_get_drvdata(dev);
390 struct i2c_client *client = data->client;
391 int nr = to_sensor_dev_attr(attr)->index;
392 int regvalue;
393 unsigned long val;
394 int err;
395
396 err = kstrtoul(buf, 10, &val);
397 if (err)
398 return err;
399
400 switch (val) {
401 case 1:
402 val = 0;
403 break;
404 case 2:
405 val = 1;
406 break;
407 case 4:
408 val = 2;
409 break;
410 case 8:
411 val = 3;
412 break;
413 default:
414 dev_err(dev,
415 "Invalid fan clock divider %lu, choose one of 1, 2, 4 or 8\n",
416 val);
417 return -EINVAL;
418 }
419
420 mutex_lock(&data->update_lock);
421 regvalue = gl518_read_value(client, GL518_REG_MISC);
422 data->fan_div[nr] = val;
423 regvalue = (regvalue & ~(0xc0 >> (2 * nr)))
424 | (data->fan_div[nr] << (6 - 2 * nr));
425 gl518_write_value(client, GL518_REG_MISC, regvalue);
426 mutex_unlock(&data->update_lock);
427 return count;
428 }
429
430 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
431 static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1);
432 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO,
433 show_temp_hyst1, set_temp_hyst1);
434 static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1);
435 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
436 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
437 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO,
438 show_fan_min, set_fan_min, 0);
439 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO,
440 show_fan_min, set_fan_min, 1);
441 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO,
442 show_fan_div, set_fan_div, 0);
443 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO,
444 show_fan_div, set_fan_div, 1);
445 static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
446 static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
447 static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
448 static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
449 static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0);
450 static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1);
451 static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2);
452 static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3);
453 static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0);
454 static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1);
455 static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2);
456 static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3);
457 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
458 static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO,
459 show_beep_enable, set_beep_enable);
460 static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO,
461 show_beep_mask, set_beep_mask);
462
show_alarm(struct device * dev,struct device_attribute * attr,char * buf)463 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
464 char *buf)
465 {
466 int bitnr = to_sensor_dev_attr(attr)->index;
467 struct gl518_data *data = gl518_update_device(dev);
468 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
469 }
470
471 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
472 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
473 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
474 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
475 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
476 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5);
477 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6);
478
show_beep(struct device * dev,struct device_attribute * attr,char * buf)479 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
480 char *buf)
481 {
482 int bitnr = to_sensor_dev_attr(attr)->index;
483 struct gl518_data *data = gl518_update_device(dev);
484 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
485 }
486
set_beep(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)487 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
488 const char *buf, size_t count)
489 {
490 struct gl518_data *data = dev_get_drvdata(dev);
491 struct i2c_client *client = data->client;
492 int bitnr = to_sensor_dev_attr(attr)->index;
493 unsigned long bit;
494 int err;
495
496 err = kstrtoul(buf, 10, &bit);
497 if (err)
498 return err;
499
500 if (bit & ~1)
501 return -EINVAL;
502
503 mutex_lock(&data->update_lock);
504 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
505 if (bit)
506 data->beep_mask |= (1 << bitnr);
507 else
508 data->beep_mask &= ~(1 << bitnr);
509 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
510 mutex_unlock(&data->update_lock);
511 return count;
512 }
513
514 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0);
515 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1);
516 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2);
517 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3);
518 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4);
519 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5);
520 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6);
521
522 static struct attribute *gl518_attributes[] = {
523 &dev_attr_in3_input.attr,
524 &dev_attr_in0_min.attr,
525 &dev_attr_in1_min.attr,
526 &dev_attr_in2_min.attr,
527 &dev_attr_in3_min.attr,
528 &dev_attr_in0_max.attr,
529 &dev_attr_in1_max.attr,
530 &dev_attr_in2_max.attr,
531 &dev_attr_in3_max.attr,
532 &sensor_dev_attr_in0_alarm.dev_attr.attr,
533 &sensor_dev_attr_in1_alarm.dev_attr.attr,
534 &sensor_dev_attr_in2_alarm.dev_attr.attr,
535 &sensor_dev_attr_in3_alarm.dev_attr.attr,
536 &sensor_dev_attr_in0_beep.dev_attr.attr,
537 &sensor_dev_attr_in1_beep.dev_attr.attr,
538 &sensor_dev_attr_in2_beep.dev_attr.attr,
539 &sensor_dev_attr_in3_beep.dev_attr.attr,
540
541 &dev_attr_fan1_auto.attr,
542 &sensor_dev_attr_fan1_input.dev_attr.attr,
543 &sensor_dev_attr_fan2_input.dev_attr.attr,
544 &sensor_dev_attr_fan1_min.dev_attr.attr,
545 &sensor_dev_attr_fan2_min.dev_attr.attr,
546 &sensor_dev_attr_fan1_div.dev_attr.attr,
547 &sensor_dev_attr_fan2_div.dev_attr.attr,
548 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
549 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
550 &sensor_dev_attr_fan1_beep.dev_attr.attr,
551 &sensor_dev_attr_fan2_beep.dev_attr.attr,
552
553 &dev_attr_temp1_input.attr,
554 &dev_attr_temp1_max.attr,
555 &dev_attr_temp1_max_hyst.attr,
556 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
557 &sensor_dev_attr_temp1_beep.dev_attr.attr,
558
559 &dev_attr_alarms.attr,
560 &dev_attr_beep_enable.attr,
561 &dev_attr_beep_mask.attr,
562 NULL
563 };
564
565 static const struct attribute_group gl518_group = {
566 .attrs = gl518_attributes,
567 };
568
569 static struct attribute *gl518_attributes_r80[] = {
570 &dev_attr_in0_input.attr,
571 &dev_attr_in1_input.attr,
572 &dev_attr_in2_input.attr,
573 NULL
574 };
575
576 static const struct attribute_group gl518_group_r80 = {
577 .attrs = gl518_attributes_r80,
578 };
579
580 /*
581 * Real code
582 */
583
584 /* Return 0 if detection is successful, -ENODEV otherwise */
gl518_detect(struct i2c_client * client,struct i2c_board_info * info)585 static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info)
586 {
587 struct i2c_adapter *adapter = client->adapter;
588 int rev;
589
590 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
591 I2C_FUNC_SMBUS_WORD_DATA))
592 return -ENODEV;
593
594 /* Now, we do the remaining detection. */
595 if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80)
596 || (gl518_read_value(client, GL518_REG_CONF) & 0x80))
597 return -ENODEV;
598
599 /* Determine the chip type. */
600 rev = gl518_read_value(client, GL518_REG_REVISION);
601 if (rev != 0x00 && rev != 0x80)
602 return -ENODEV;
603
604 strlcpy(info->type, "gl518sm", I2C_NAME_SIZE);
605
606 return 0;
607 }
608
609 /*
610 * Called when we have found a new GL518SM.
611 * Note that we preserve D4:NoFan2 and D2:beep_enable.
612 */
gl518_init_client(struct i2c_client * client)613 static void gl518_init_client(struct i2c_client *client)
614 {
615 /* Make sure we leave D7:Reset untouched */
616 u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f;
617
618 /* Comparator mode (D3=0), standby mode (D6=0) */
619 gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37));
620
621 /* Never interrupts */
622 gl518_write_value(client, GL518_REG_MASK, 0x00);
623
624 /* Clear status register (D5=1), start (D6=1) */
625 gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue);
626 gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue);
627 }
628
gl518_probe(struct i2c_client * client,const struct i2c_device_id * id)629 static int gl518_probe(struct i2c_client *client,
630 const struct i2c_device_id *id)
631 {
632 struct device *dev = &client->dev;
633 struct device *hwmon_dev;
634 struct gl518_data *data;
635 int revision;
636
637 data = devm_kzalloc(dev, sizeof(struct gl518_data), GFP_KERNEL);
638 if (!data)
639 return -ENOMEM;
640
641 data->client = client;
642 revision = gl518_read_value(client, GL518_REG_REVISION);
643 data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00;
644 mutex_init(&data->update_lock);
645
646 /* Initialize the GL518SM chip */
647 data->alarm_mask = 0xff;
648 gl518_init_client(client);
649
650 /* sysfs hooks */
651 data->groups[0] = &gl518_group;
652 if (data->type == gl518sm_r80)
653 data->groups[1] = &gl518_group_r80;
654
655 hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
656 data, data->groups);
657 return PTR_ERR_OR_ZERO(hwmon_dev);
658 }
659
660 static const struct i2c_device_id gl518_id[] = {
661 { "gl518sm", 0 },
662 { }
663 };
664 MODULE_DEVICE_TABLE(i2c, gl518_id);
665
666 static struct i2c_driver gl518_driver = {
667 .class = I2C_CLASS_HWMON,
668 .driver = {
669 .name = "gl518sm",
670 },
671 .probe = gl518_probe,
672 .id_table = gl518_id,
673 .detect = gl518_detect,
674 .address_list = normal_i2c,
675 };
676
677 module_i2c_driver(gl518_driver);
678
679 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
680 "Kyosti Malkki <kmalkki@cc.hut.fi> and "
681 "Hong-Gunn Chew <hglinux@gunnet.org>");
682 MODULE_DESCRIPTION("GL518SM driver");
683 MODULE_LICENSE("GPL");
684
