e9407acd72cbe2a12174e5caa6c41496d756e1f3
[linux-2.6.git] / drivers / hwmon / gl518sm.c
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 <khali@linux-fr.org>
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 /* Insmod parameters */
50 I2C_CLIENT_INSMOD_2(gl518sm_r00, gl518sm_r80);
51
52 /* Many GL518 constants specified below */
53
54 /* The GL518 registers */
55 #define GL518_REG_CHIP_ID       0x00
56 #define GL518_REG_REVISION      0x01
57 #define GL518_REG_VENDOR_ID     0x02
58 #define GL518_REG_CONF          0x03
59 #define GL518_REG_TEMP_IN       0x04
60 #define GL518_REG_TEMP_MAX      0x05
61 #define GL518_REG_TEMP_HYST     0x06
62 #define GL518_REG_FAN_COUNT     0x07
63 #define GL518_REG_FAN_LIMIT     0x08
64 #define GL518_REG_VIN1_LIMIT    0x09
65 #define GL518_REG_VIN2_LIMIT    0x0a
66 #define GL518_REG_VIN3_LIMIT    0x0b
67 #define GL518_REG_VDD_LIMIT     0x0c
68 #define GL518_REG_VIN3          0x0d
69 #define GL518_REG_MISC          0x0f
70 #define GL518_REG_ALARM         0x10
71 #define GL518_REG_MASK          0x11
72 #define GL518_REG_INT           0x12
73 #define GL518_REG_VIN2          0x13
74 #define GL518_REG_VIN1          0x14
75 #define GL518_REG_VDD           0x15
76
77
78 /*
79  * Conversions. Rounding and limit checking is only done on the TO_REG
80  * variants. Note that you should be a bit careful with which arguments
81  * these macros are called: arguments may be evaluated more than once.
82  * Fixing this is just not worth it.
83  */
84
85 #define RAW_FROM_REG(val)       val
86
87 #define BOOL_FROM_REG(val)      ((val)?0:1)
88 #define BOOL_TO_REG(val)        ((val)?0:1)
89
90 #define TEMP_TO_REG(val)        (SENSORS_LIMIT(((((val)<0? \
91                                 (val)-500:(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 = SENSORS_LIMIT(rpm, 1, 960000) * div;
100         return SENSORS_LIMIT((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)          (SENSORS_LIMIT((((val)+9)/19),0,255))
105 #define IN_FROM_REG(val)        ((val)*19)
106
107 #define VDD_TO_REG(val)         (SENSORS_LIMIT((((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 device *hwmon_dev;
118         enum chips type;
119
120         struct mutex update_lock;
121         char valid;             /* !=0 if following fields are valid */
122         unsigned long last_updated;     /* In jiffies */
123
124         u8 voltage_in[4];       /* Register values; [0] = VDD */
125         u8 voltage_min[4];      /* Register values; [0] = VDD */
126         u8 voltage_max[4];      /* Register values; [0] = VDD */
127         u8 fan_in[2];
128         u8 fan_min[2];
129         u8 fan_div[2];          /* Register encoding, shifted right */
130         u8 fan_auto1;           /* Boolean */
131         u8 temp_in;             /* Register values */
132         u8 temp_max;            /* Register values */
133         u8 temp_hyst;           /* Register values */
134         u8 alarms;              /* Register value */
135         u8 alarm_mask;
136         u8 beep_mask;           /* Register value */
137         u8 beep_enable;         /* Boolean */
138 };
139
140 static int gl518_probe(struct i2c_client *client,
141                        const struct i2c_device_id *id);
142 static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info);
143 static void gl518_init_client(struct i2c_client *client);
144 static int gl518_remove(struct i2c_client *client);
145 static int gl518_read_value(struct i2c_client *client, u8 reg);
146 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value);
147 static struct gl518_data *gl518_update_device(struct device *dev);
148
149 static const struct i2c_device_id gl518_id[] = {
150         { "gl518sm", 0 },
151         { }
152 };
153 MODULE_DEVICE_TABLE(i2c, gl518_id);
154
155 /* This is the driver that will be inserted */
156 static struct i2c_driver gl518_driver = {
157         .class          = I2C_CLASS_HWMON,
158         .driver = {
159                 .name   = "gl518sm",
160         },
161         .probe          = gl518_probe,
162         .remove         = gl518_remove,
163         .id_table       = gl518_id,
164         .detect         = gl518_detect,
165         .address_list   = normal_i2c,
166 };
167
168 /*
169  * Sysfs stuff
170  */
171
172 #define show(type, suffix, value)                                       \
173 static ssize_t show_##suffix(struct device *dev, struct device_attribute *attr, char *buf)              \
174 {                                                                       \
175         struct gl518_data *data = gl518_update_device(dev);             \
176         return sprintf(buf, "%d\n", type##_FROM_REG(data->value));      \
177 }
178
179 show(TEMP, temp_input1, temp_in);
180 show(TEMP, temp_max1, temp_max);
181 show(TEMP, temp_hyst1, temp_hyst);
182 show(BOOL, fan_auto1, fan_auto1);
183 show(VDD, in_input0, voltage_in[0]);
184 show(IN, in_input1, voltage_in[1]);
185 show(IN, in_input2, voltage_in[2]);
186 show(IN, in_input3, voltage_in[3]);
187 show(VDD, in_min0, voltage_min[0]);
188 show(IN, in_min1, voltage_min[1]);
189 show(IN, in_min2, voltage_min[2]);
190 show(IN, in_min3, voltage_min[3]);
191 show(VDD, in_max0, voltage_max[0]);
192 show(IN, in_max1, voltage_max[1]);
193 show(IN, in_max2, voltage_max[2]);
194 show(IN, in_max3, voltage_max[3]);
195 show(RAW, alarms, alarms);
196 show(BOOL, beep_enable, beep_enable);
197 show(BEEP_MASK, beep_mask, beep_mask);
198
199 static ssize_t show_fan_input(struct device *dev,
200                               struct device_attribute *attr, char *buf)
201 {
202         int nr = to_sensor_dev_attr(attr)->index;
203         struct gl518_data *data = gl518_update_device(dev);
204         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_in[nr],
205                                         DIV_FROM_REG(data->fan_div[nr])));
206 }
207
208 static ssize_t show_fan_min(struct device *dev,
209                             struct device_attribute *attr, char *buf)
210 {
211         int nr = to_sensor_dev_attr(attr)->index;
212         struct gl518_data *data = gl518_update_device(dev);
213         return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
214                                         DIV_FROM_REG(data->fan_div[nr])));
215 }
216
217 static ssize_t show_fan_div(struct device *dev,
218                             struct device_attribute *attr, char *buf)
219 {
220         int nr = to_sensor_dev_attr(attr)->index;
221         struct gl518_data *data = gl518_update_device(dev);
222         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
223 }
224
225 #define set(type, suffix, value, reg)                                   \
226 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
227         size_t count)                                                   \
228 {                                                                       \
229         struct i2c_client *client = to_i2c_client(dev);                 \
230         struct gl518_data *data = i2c_get_clientdata(client);           \
231         long val = simple_strtol(buf, NULL, 10);                        \
232                                                                         \
233         mutex_lock(&data->update_lock);                                 \
234         data->value = type##_TO_REG(val);                               \
235         gl518_write_value(client, reg, data->value);                    \
236         mutex_unlock(&data->update_lock);                               \
237         return count;                                                   \
238 }
239
240 #define set_bits(type, suffix, value, reg, mask, shift)                 \
241 static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
242         size_t count)                                                   \
243 {                                                                       \
244         struct i2c_client *client = to_i2c_client(dev);                 \
245         struct gl518_data *data = i2c_get_clientdata(client);           \
246         int regvalue;                                                   \
247         unsigned long val = simple_strtoul(buf, NULL, 10);              \
248                                                                         \
249         mutex_lock(&data->update_lock);                                 \
250         regvalue = gl518_read_value(client, reg);                       \
251         data->value = type##_TO_REG(val);                               \
252         regvalue = (regvalue & ~mask) | (data->value << shift);         \
253         gl518_write_value(client, reg, regvalue);                       \
254         mutex_unlock(&data->update_lock);                               \
255         return count;                                                   \
256 }
257
258 #define set_low(type, suffix, value, reg)                               \
259         set_bits(type, suffix, value, reg, 0x00ff, 0)
260 #define set_high(type, suffix, value, reg)                              \
261         set_bits(type, suffix, value, reg, 0xff00, 8)
262
263 set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX);
264 set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST);
265 set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3);
266 set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT);
267 set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT);
268 set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT);
269 set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT);
270 set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT);
271 set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT);
272 set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT);
273 set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT);
274 set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2);
275 set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM);
276
277 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
278                            const char *buf, size_t count)
279 {
280         struct i2c_client *client = to_i2c_client(dev);
281         struct gl518_data *data = i2c_get_clientdata(client);
282         int nr = to_sensor_dev_attr(attr)->index;
283         int regvalue;
284         unsigned long val = simple_strtoul(buf, NULL, 10);
285
286         mutex_lock(&data->update_lock);
287         regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT);
288         data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
289         regvalue = (regvalue & (0xff << (8 * nr)))
290                  | (data->fan_min[nr] << (8 * (1 - nr)));
291         gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue);
292
293         data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
294         if (data->fan_min[nr] == 0)
295                 data->alarm_mask &= ~(0x20 << nr);
296         else
297                 data->alarm_mask |= (0x20 << nr);
298         data->beep_mask &= data->alarm_mask;
299         gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
300
301         mutex_unlock(&data->update_lock);
302         return count;
303 }
304
305 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
306                            const char *buf, size_t count)
307 {
308         struct i2c_client *client = to_i2c_client(dev);
309         struct gl518_data *data = i2c_get_clientdata(client);
310         int nr = to_sensor_dev_attr(attr)->index;
311         int regvalue;
312         unsigned long val = simple_strtoul(buf, NULL, 10);
313
314         switch (val) {
315         case 1: val = 0; break;
316         case 2: val = 1; break;
317         case 4: val = 2; break;
318         case 8: val = 3; break;
319         default:
320                 dev_err(dev, "Invalid fan clock divider %lu, choose one "
321                         "of 1, 2, 4 or 8\n", val);
322                 return -EINVAL;
323         }
324
325         mutex_lock(&data->update_lock);
326         regvalue = gl518_read_value(client, GL518_REG_MISC);
327         data->fan_div[nr] = val;
328         regvalue = (regvalue & ~(0xc0 >> (2 * nr)))
329                  | (data->fan_div[nr] << (6 - 2 * nr));
330         gl518_write_value(client, GL518_REG_MISC, regvalue);
331         mutex_unlock(&data->update_lock);
332         return count;
333 }
334
335 static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
336 static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1);
337 static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO,
338         show_temp_hyst1, set_temp_hyst1);
339 static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1);
340 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
341 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
342 static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO,
343         show_fan_min, set_fan_min, 0);
344 static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO,
345         show_fan_min, set_fan_min, 1);
346 static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO,
347         show_fan_div, set_fan_div, 0);
348 static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO,
349         show_fan_div, set_fan_div, 1);
350 static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
351 static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
352 static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
353 static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
354 static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0);
355 static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1);
356 static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2);
357 static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3);
358 static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0);
359 static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1);
360 static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2);
361 static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3);
362 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
363 static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO,
364         show_beep_enable, set_beep_enable);
365 static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO,
366         show_beep_mask, set_beep_mask);
367
368 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
369                           char *buf)
370 {
371         int bitnr = to_sensor_dev_attr(attr)->index;
372         struct gl518_data *data = gl518_update_device(dev);
373         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
374 }
375
376 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
377 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
378 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
379 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
380 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
381 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 5);
382 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 6);
383
384 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
385                           char *buf)
386 {
387         int bitnr = to_sensor_dev_attr(attr)->index;
388         struct gl518_data *data = gl518_update_device(dev);
389         return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
390 }
391
392 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
393                         const char *buf, size_t count)
394 {
395         struct i2c_client *client = to_i2c_client(dev);
396         struct gl518_data *data = i2c_get_clientdata(client);
397         int bitnr = to_sensor_dev_attr(attr)->index;
398         unsigned long bit;
399
400         bit = simple_strtoul(buf, NULL, 10);
401         if (bit & ~1)
402                 return -EINVAL;
403
404         mutex_lock(&data->update_lock);
405         data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
406         if (bit)
407                 data->beep_mask |= (1 << bitnr);
408         else
409                 data->beep_mask &= ~(1 << bitnr);
410         gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
411         mutex_unlock(&data->update_lock);
412         return count;
413 }
414
415 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 0);
416 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 1);
417 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 2);
418 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 3);
419 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 4);
420 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 5);
421 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO|S_IWUSR, show_beep, set_beep, 6);
422
423 static struct attribute *gl518_attributes[] = {
424         &dev_attr_in3_input.attr,
425         &dev_attr_in0_min.attr,
426         &dev_attr_in1_min.attr,
427         &dev_attr_in2_min.attr,
428         &dev_attr_in3_min.attr,
429         &dev_attr_in0_max.attr,
430         &dev_attr_in1_max.attr,
431         &dev_attr_in2_max.attr,
432         &dev_attr_in3_max.attr,
433         &sensor_dev_attr_in0_alarm.dev_attr.attr,
434         &sensor_dev_attr_in1_alarm.dev_attr.attr,
435         &sensor_dev_attr_in2_alarm.dev_attr.attr,
436         &sensor_dev_attr_in3_alarm.dev_attr.attr,
437         &sensor_dev_attr_in0_beep.dev_attr.attr,
438         &sensor_dev_attr_in1_beep.dev_attr.attr,
439         &sensor_dev_attr_in2_beep.dev_attr.attr,
440         &sensor_dev_attr_in3_beep.dev_attr.attr,
441
442         &dev_attr_fan1_auto.attr,
443         &sensor_dev_attr_fan1_input.dev_attr.attr,
444         &sensor_dev_attr_fan2_input.dev_attr.attr,
445         &sensor_dev_attr_fan1_min.dev_attr.attr,
446         &sensor_dev_attr_fan2_min.dev_attr.attr,
447         &sensor_dev_attr_fan1_div.dev_attr.attr,
448         &sensor_dev_attr_fan2_div.dev_attr.attr,
449         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
450         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
451         &sensor_dev_attr_fan1_beep.dev_attr.attr,
452         &sensor_dev_attr_fan2_beep.dev_attr.attr,
453
454         &dev_attr_temp1_input.attr,
455         &dev_attr_temp1_max.attr,
456         &dev_attr_temp1_max_hyst.attr,
457         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
458         &sensor_dev_attr_temp1_beep.dev_attr.attr,
459
460         &dev_attr_alarms.attr,
461         &dev_attr_beep_enable.attr,
462         &dev_attr_beep_mask.attr,
463         NULL
464 };
465
466 static const struct attribute_group gl518_group = {
467         .attrs = gl518_attributes,
468 };
469
470 static struct attribute *gl518_attributes_r80[] = {
471         &dev_attr_in0_input.attr,
472         &dev_attr_in1_input.attr,
473         &dev_attr_in2_input.attr,
474         NULL
475 };
476
477 static const struct attribute_group gl518_group_r80 = {
478         .attrs = gl518_attributes_r80,
479 };
480
481 /*
482  * Real code
483  */
484
485 /* Return 0 if detection is successful, -ENODEV otherwise */
486 static int gl518_detect(struct i2c_client *client, struct i2c_board_info *info)
487 {
488         struct i2c_adapter *adapter = client->adapter;
489         int rev;
490
491         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
492                                      I2C_FUNC_SMBUS_WORD_DATA))
493                 return -ENODEV;
494
495         /* Now, we do the remaining detection. */
496         if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80)
497          || (gl518_read_value(client, GL518_REG_CONF) & 0x80))
498                 return -ENODEV;
499
500         /* Determine the chip type. */
501         rev = gl518_read_value(client, GL518_REG_REVISION);
502         if (rev != 0x00 && rev != 0x80)
503                 return -ENODEV;
504
505         strlcpy(info->type, "gl518sm", I2C_NAME_SIZE);
506
507         return 0;
508 }
509
510 static int gl518_probe(struct i2c_client *client,
511                        const struct i2c_device_id *id)
512 {
513         struct gl518_data *data;
514         int err, revision;
515
516         data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL);
517         if (!data) {
518                 err = -ENOMEM;
519                 goto exit;
520         }
521
522         i2c_set_clientdata(client, data);
523         revision = gl518_read_value(client, GL518_REG_REVISION);
524         data->type = revision == 0x80 ? gl518sm_r80 : gl518sm_r00;
525         mutex_init(&data->update_lock);
526
527         /* Initialize the GL518SM chip */
528         data->alarm_mask = 0xff;
529         gl518_init_client(client);
530
531         /* Register sysfs hooks */
532         if ((err = sysfs_create_group(&client->dev.kobj, &gl518_group)))
533                 goto exit_free;
534         if (data->type == gl518sm_r80)
535                 if ((err = sysfs_create_group(&client->dev.kobj,
536                                               &gl518_group_r80)))
537                         goto exit_remove_files;
538
539         data->hwmon_dev = hwmon_device_register(&client->dev);
540         if (IS_ERR(data->hwmon_dev)) {
541                 err = PTR_ERR(data->hwmon_dev);
542                 goto exit_remove_files;
543         }
544
545         return 0;
546
547 exit_remove_files:
548         sysfs_remove_group(&client->dev.kobj, &gl518_group);
549         if (data->type == gl518sm_r80)
550                 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80);
551 exit_free:
552         kfree(data);
553 exit:
554         return err;
555 }
556
557
558 /* Called when we have found a new GL518SM.
559    Note that we preserve D4:NoFan2 and D2:beep_enable. */
560 static void gl518_init_client(struct i2c_client *client)
561 {
562         /* Make sure we leave D7:Reset untouched */
563         u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f;
564
565         /* Comparator mode (D3=0), standby mode (D6=0) */
566         gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37));
567
568         /* Never interrupts */
569         gl518_write_value(client, GL518_REG_MASK, 0x00);
570
571         /* Clear status register (D5=1), start (D6=1) */
572         gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue);
573         gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue);
574 }
575
576 static int gl518_remove(struct i2c_client *client)
577 {
578         struct gl518_data *data = i2c_get_clientdata(client);
579
580         hwmon_device_unregister(data->hwmon_dev);
581         sysfs_remove_group(&client->dev.kobj, &gl518_group);
582         if (data->type == gl518sm_r80)
583                 sysfs_remove_group(&client->dev.kobj, &gl518_group_r80);
584
585         kfree(data);
586         return 0;
587 }
588
589 /* Registers 0x07 to 0x0c are word-sized, others are byte-sized
590    GL518 uses a high-byte first convention, which is exactly opposite to
591    the SMBus standard. */
592 static int gl518_read_value(struct i2c_client *client, u8 reg)
593 {
594         if ((reg >= 0x07) && (reg <= 0x0c))
595                 return swab16(i2c_smbus_read_word_data(client, reg));
596         else
597                 return i2c_smbus_read_byte_data(client, reg);
598 }
599
600 static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value)
601 {
602         if ((reg >= 0x07) && (reg <= 0x0c))
603                 return i2c_smbus_write_word_data(client, reg, swab16(value));
604         else
605                 return i2c_smbus_write_byte_data(client, reg, value);
606 }
607
608 static struct gl518_data *gl518_update_device(struct device *dev)
609 {
610         struct i2c_client *client = to_i2c_client(dev);
611         struct gl518_data *data = i2c_get_clientdata(client);
612         int val;
613
614         mutex_lock(&data->update_lock);
615
616         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
617             || !data->valid) {
618                 dev_dbg(&client->dev, "Starting gl518 update\n");
619
620                 data->alarms = gl518_read_value(client, GL518_REG_INT);
621                 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
622
623                 val = gl518_read_value(client, GL518_REG_VDD_LIMIT);
624                 data->voltage_min[0] = val & 0xff;
625                 data->voltage_max[0] = (val >> 8) & 0xff;
626                 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT);
627                 data->voltage_min[1] = val & 0xff;
628                 data->voltage_max[1] = (val >> 8) & 0xff;
629                 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT);
630                 data->voltage_min[2] = val & 0xff;
631                 data->voltage_max[2] = (val >> 8) & 0xff;
632                 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT);
633                 data->voltage_min[3] = val & 0xff;
634                 data->voltage_max[3] = (val >> 8) & 0xff;
635
636                 val = gl518_read_value(client, GL518_REG_FAN_COUNT);
637                 data->fan_in[0] = (val >> 8) & 0xff;
638                 data->fan_in[1] = val & 0xff;
639
640                 val = gl518_read_value(client, GL518_REG_FAN_LIMIT);
641                 data->fan_min[0] = (val >> 8) & 0xff;
642                 data->fan_min[1] = val & 0xff;
643
644                 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN);
645                 data->temp_max =
646                     gl518_read_value(client, GL518_REG_TEMP_MAX);
647                 data->temp_hyst =
648                     gl518_read_value(client, GL518_REG_TEMP_HYST);
649
650                 val = gl518_read_value(client, GL518_REG_MISC);
651                 data->fan_div[0] = (val >> 6) & 0x03;
652                 data->fan_div[1] = (val >> 4) & 0x03;
653                 data->fan_auto1  = (val >> 3) & 0x01;
654
655                 data->alarms &= data->alarm_mask;
656
657                 val = gl518_read_value(client, GL518_REG_CONF);
658                 data->beep_enable = (val >> 2) & 1;
659
660                 if (data->type != gl518sm_r00) {
661                         data->voltage_in[0] =
662                             gl518_read_value(client, GL518_REG_VDD);
663                         data->voltage_in[1] =
664                             gl518_read_value(client, GL518_REG_VIN1);
665                         data->voltage_in[2] =
666                             gl518_read_value(client, GL518_REG_VIN2);
667                 }
668                 data->voltage_in[3] =
669                     gl518_read_value(client, GL518_REG_VIN3);
670
671                 data->last_updated = jiffies;
672                 data->valid = 1;
673         }
674
675         mutex_unlock(&data->update_lock);
676
677         return data;
678 }
679
680 static int __init sensors_gl518sm_init(void)
681 {
682         return i2c_add_driver(&gl518_driver);
683 }
684
685 static void __exit sensors_gl518sm_exit(void)
686 {
687         i2c_del_driver(&gl518_driver);
688 }
689
690 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
691         "Kyosti Malkki <kmalkki@cc.hut.fi> and "
692         "Hong-Gunn Chew <hglinux@gunnet.org>");
693 MODULE_DESCRIPTION("GL518SM driver");
694 MODULE_LICENSE("GPL");
695
696 module_init(sensors_gl518sm_init);
697 module_exit(sensors_gl518sm_exit);