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hwmon: (gl518sm) Various cleanups
[mirror_ubuntu-kernels.git] / drivers / hwmon / gl518sm.c
CommitLineData
1da177e4
LT		 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.
1da177e4
LT		 33 */
34
1da177e4
LT		 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>
943b0830
MH		 40#include <linux/hwmon.h>
41#include <linux/err.h>
9a61bf63 42#include <linux/mutex.h>
87808be4 43#include <linux/sysfs.h>
1da177e4
LT		 44
45/* Addresses to scan */
46static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
1da177e4
LT		 47
48/* Insmod parameters */
f4b50261 49I2C_CLIENT_INSMOD_2(gl518sm_r00, gl518sm_r80);
1da177e4
LT		 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) (SENSORS_LIMIT(((((val)<0? \
90 (val)-500:(val)+500)/1000)+119),0,255))
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 = SENSORS_LIMIT(rpm, 1, 1920000) * div;
99 return SENSORS_LIMIT((960000 + rpmdiv / 2) / rpmdiv, 1, 255);
100}
101#define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (960000/((val)*(div))))
102
103#define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
104#define IN_FROM_REG(val) ((val)*19)
105
106#define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
107#define VDD_FROM_REG(val) (((val)*95+2)/4)
108
109#define DIV_TO_REG(val) ((val)==4?2:(val)==2?1:(val)==1?0:3)
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 */
116struct gl518_data {
117 struct i2c_client client;
1beeffe4 118 struct device *hwmon_dev;
1da177e4
LT		 119 enum chips type;
120
9a61bf63 121 struct mutex update_lock;
1da177e4
LT		 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 */
1da177e4
LT		 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 */
a5955ed2 136 u8 alarm_mask;
1da177e4
LT		 137 u8 beep_mask; /* Register value */
138 u8 beep_enable; /* Boolean */
139};
140
141static int gl518_attach_adapter(struct i2c_adapter *adapter);
142static int gl518_detect(struct i2c_adapter *adapter, int address, int kind);
143static void gl518_init_client(struct i2c_client *client);
144static int gl518_detach_client(struct i2c_client *client);
145static int gl518_read_value(struct i2c_client *client, u8 reg);
146static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value);
147static struct gl518_data *gl518_update_device(struct device *dev);
148
149/* This is the driver that will be inserted */
150static struct i2c_driver gl518_driver = {
cdaf7934 151 .driver = {
cdaf7934
LR		 152 .name = "gl518sm",
153 },
1da177e4
LT		 154 .attach_adapter = gl518_attach_adapter,
155 .detach_client = gl518_detach_client,
156};
157
158/*
159 * Sysfs stuff
160 */
161
162#define show(type, suffix, value) \
30f74292 163static ssize_t show_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 164{ \
165 struct gl518_data *data = gl518_update_device(dev); \
166 return sprintf(buf, "%d\n", type##_FROM_REG(data->value)); \
167}
168
169#define show_fan(suffix, value, index) \
30f74292 170static ssize_t show_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 171{ \
172 struct gl518_data *data = gl518_update_device(dev); \
173 return sprintf(buf, "%d\n", FAN_FROM_REG(data->value[index], \
174 DIV_FROM_REG(data->fan_div[index]))); \
175}
176
177show(TEMP, temp_input1, temp_in);
178show(TEMP, temp_max1, temp_max);
179show(TEMP, temp_hyst1, temp_hyst);
180show(BOOL, fan_auto1, fan_auto1);
181show_fan(fan_input1, fan_in, 0);
182show_fan(fan_input2, fan_in, 1);
183show_fan(fan_min1, fan_min, 0);
184show_fan(fan_min2, fan_min, 1);
185show(DIV, fan_div1, fan_div[0]);
186show(DIV, fan_div2, fan_div[1]);
187show(VDD, in_input0, voltage_in[0]);
188show(IN, in_input1, voltage_in[1]);
189show(IN, in_input2, voltage_in[2]);
190show(IN, in_input3, voltage_in[3]);
191show(VDD, in_min0, voltage_min[0]);
192show(IN, in_min1, voltage_min[1]);
193show(IN, in_min2, voltage_min[2]);
194show(IN, in_min3, voltage_min[3]);
195show(VDD, in_max0, voltage_max[0]);
196show(IN, in_max1, voltage_max[1]);
197show(IN, in_max2, voltage_max[2]);
198show(IN, in_max3, voltage_max[3]);
199show(RAW, alarms, alarms);
200show(BOOL, beep_enable, beep_enable);
201show(BEEP_MASK, beep_mask, beep_mask);
202
203#define set(type, suffix, value, reg) \
30f74292 204static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
1da177e4
LT		 205 size_t count) \
206{ \
207 struct i2c_client *client = to_i2c_client(dev); \
208 struct gl518_data *data = i2c_get_clientdata(client); \
209 long val = simple_strtol(buf, NULL, 10); \
210 \
9a61bf63 211 mutex_lock(&data->update_lock); \
1da177e4
LT		 212 data->value = type##_TO_REG(val); \
213 gl518_write_value(client, reg, data->value); \
9a61bf63 214 mutex_unlock(&data->update_lock); \
1da177e4
LT		 215 return count; \
216}
217
218#define set_bits(type, suffix, value, reg, mask, shift) \
30f74292 219static ssize_t set_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
1da177e4
LT		 220 size_t count) \
221{ \
222 struct i2c_client *client = to_i2c_client(dev); \
223 struct gl518_data *data = i2c_get_clientdata(client); \
224 int regvalue; \
225 unsigned long val = simple_strtoul(buf, NULL, 10); \
226 \
9a61bf63 227 mutex_lock(&data->update_lock); \
1da177e4
LT		 228 regvalue = gl518_read_value(client, reg); \
229 data->value = type##_TO_REG(val); \
230 regvalue = (regvalue & ~mask) | (data->value << shift); \
231 gl518_write_value(client, reg, regvalue); \
9a61bf63 232 mutex_unlock(&data->update_lock); \
1da177e4
LT		 233 return count; \
234}
235
236#define set_low(type, suffix, value, reg) \
237 set_bits(type, suffix, value, reg, 0x00ff, 0)
238#define set_high(type, suffix, value, reg) \
239 set_bits(type, suffix, value, reg, 0xff00, 8)
240
241set(TEMP, temp_max1, temp_max, GL518_REG_TEMP_MAX);
242set(TEMP, temp_hyst1, temp_hyst, GL518_REG_TEMP_HYST);
243set_bits(BOOL, fan_auto1, fan_auto1, GL518_REG_MISC, 0x08, 3);
244set_bits(DIV, fan_div1, fan_div[0], GL518_REG_MISC, 0xc0, 6);
245set_bits(DIV, fan_div2, fan_div[1], GL518_REG_MISC, 0x30, 4);
246set_low(VDD, in_min0, voltage_min[0], GL518_REG_VDD_LIMIT);
247set_low(IN, in_min1, voltage_min[1], GL518_REG_VIN1_LIMIT);
248set_low(IN, in_min2, voltage_min[2], GL518_REG_VIN2_LIMIT);
249set_low(IN, in_min3, voltage_min[3], GL518_REG_VIN3_LIMIT);
250set_high(VDD, in_max0, voltage_max[0], GL518_REG_VDD_LIMIT);
251set_high(IN, in_max1, voltage_max[1], GL518_REG_VIN1_LIMIT);
252set_high(IN, in_max2, voltage_max[2], GL518_REG_VIN2_LIMIT);
253set_high(IN, in_max3, voltage_max[3], GL518_REG_VIN3_LIMIT);
254set_bits(BOOL, beep_enable, beep_enable, GL518_REG_CONF, 0x04, 2);
255set(BEEP_MASK, beep_mask, beep_mask, GL518_REG_ALARM);
256
30f74292 257static ssize_t set_fan_min1(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1da177e4
LT		 258{
259 struct i2c_client *client = to_i2c_client(dev);
260 struct gl518_data *data = i2c_get_clientdata(client);
261 int regvalue;
262 unsigned long val = simple_strtoul(buf, NULL, 10);
263
9a61bf63 264 mutex_lock(&data->update_lock);
1da177e4
LT		 265 regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT);
266 data->fan_min[0] = FAN_TO_REG(val,
267 DIV_FROM_REG(data->fan_div[0]));
268 regvalue = (regvalue & 0x00ff) | (data->fan_min[0] << 8);
269 gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue);
270
271 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
272 if (data->fan_min[0] == 0)
273 data->alarm_mask &= ~0x20;
274 else
275 data->alarm_mask |= 0x20;
276 data->beep_mask &= data->alarm_mask;
277 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
278
9a61bf63 279 mutex_unlock(&data->update_lock);
1da177e4
LT		 280 return count;
281}
282
30f74292 283static ssize_t set_fan_min2(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1da177e4
LT		 284{
285 struct i2c_client *client = to_i2c_client(dev);
286 struct gl518_data *data = i2c_get_clientdata(client);
287 int regvalue;
288 unsigned long val = simple_strtoul(buf, NULL, 10);
289
9a61bf63 290 mutex_lock(&data->update_lock);
1da177e4
LT		 291 regvalue = gl518_read_value(client, GL518_REG_FAN_LIMIT);
292 data->fan_min[1] = FAN_TO_REG(val,
293 DIV_FROM_REG(data->fan_div[1]));
294 regvalue = (regvalue & 0xff00) | data->fan_min[1];
295 gl518_write_value(client, GL518_REG_FAN_LIMIT, regvalue);
296
297 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
298 if (data->fan_min[1] == 0)
299 data->alarm_mask &= ~0x40;
300 else
301 data->alarm_mask |= 0x40;
302 data->beep_mask &= data->alarm_mask;
303 gl518_write_value(client, GL518_REG_ALARM, data->beep_mask);
304
9a61bf63 305 mutex_unlock(&data->update_lock);
1da177e4
LT		 306 return count;
307}
308
309static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
310static DEVICE_ATTR(temp1_max, S_IWUSR|S_IRUGO, show_temp_max1, set_temp_max1);
311static DEVICE_ATTR(temp1_max_hyst, S_IWUSR|S_IRUGO,
312 show_temp_hyst1, set_temp_hyst1);
313static DEVICE_ATTR(fan1_auto, S_IWUSR|S_IRUGO, show_fan_auto1, set_fan_auto1);
314static DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input1, NULL);
315static DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input2, NULL);
316static DEVICE_ATTR(fan1_min, S_IWUSR|S_IRUGO, show_fan_min1, set_fan_min1);
317static DEVICE_ATTR(fan2_min, S_IWUSR|S_IRUGO, show_fan_min2, set_fan_min2);
318static DEVICE_ATTR(fan1_div, S_IWUSR|S_IRUGO, show_fan_div1, set_fan_div1);
319static DEVICE_ATTR(fan2_div, S_IWUSR|S_IRUGO, show_fan_div2, set_fan_div2);
320static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
321static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
322static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
323static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
324static DEVICE_ATTR(in0_min, S_IWUSR|S_IRUGO, show_in_min0, set_in_min0);
325static DEVICE_ATTR(in1_min, S_IWUSR|S_IRUGO, show_in_min1, set_in_min1);
326static DEVICE_ATTR(in2_min, S_IWUSR|S_IRUGO, show_in_min2, set_in_min2);
327static DEVICE_ATTR(in3_min, S_IWUSR|S_IRUGO, show_in_min3, set_in_min3);
328static DEVICE_ATTR(in0_max, S_IWUSR|S_IRUGO, show_in_max0, set_in_max0);
329static DEVICE_ATTR(in1_max, S_IWUSR|S_IRUGO, show_in_max1, set_in_max1);
330static DEVICE_ATTR(in2_max, S_IWUSR|S_IRUGO, show_in_max2, set_in_max2);
331static DEVICE_ATTR(in3_max, S_IWUSR|S_IRUGO, show_in_max3, set_in_max3);
332static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
333static DEVICE_ATTR(beep_enable, S_IWUSR|S_IRUGO,
334 show_beep_enable, set_beep_enable);
335static DEVICE_ATTR(beep_mask, S_IWUSR|S_IRUGO,
336 show_beep_mask, set_beep_mask);
337
87808be4
JD		 338static struct attribute *gl518_attributes[] = {
339 &dev_attr_in0_input.attr,
340 &dev_attr_in1_input.attr,
341 &dev_attr_in2_input.attr,
342 &dev_attr_in3_input.attr,
343 &dev_attr_in0_min.attr,
344 &dev_attr_in1_min.attr,
345 &dev_attr_in2_min.attr,
346 &dev_attr_in3_min.attr,
347 &dev_attr_in0_max.attr,
348 &dev_attr_in1_max.attr,
349 &dev_attr_in2_max.attr,
350 &dev_attr_in3_max.attr,
351
352 &dev_attr_fan1_auto.attr,
353 &dev_attr_fan1_input.attr,
354 &dev_attr_fan2_input.attr,
355 &dev_attr_fan1_min.attr,
356 &dev_attr_fan2_min.attr,
357 &dev_attr_fan1_div.attr,
358 &dev_attr_fan2_div.attr,
359
360 &dev_attr_temp1_input.attr,
361 &dev_attr_temp1_max.attr,
362 &dev_attr_temp1_max_hyst.attr,
363
364 &dev_attr_alarms.attr,
365 &dev_attr_beep_enable.attr,
366 &dev_attr_beep_mask.attr,
367 NULL
368};
369
370static const struct attribute_group gl518_group = {
371 .attrs = gl518_attributes,
372};
373
1da177e4
LT		 374/*
375 * Real code
376 */
377
378static int gl518_attach_adapter(struct i2c_adapter *adapter)
379{
380 if (!(adapter->class & I2C_CLASS_HWMON))
381 return 0;
2ed2dc3c 382 return i2c_probe(adapter, &addr_data, gl518_detect);
1da177e4
LT		 383}
384
385static int gl518_detect(struct i2c_adapter *adapter, int address, int kind)
386{
387 int i;
a5955ed2 388 struct i2c_client *client;
1da177e4
LT		 389 struct gl518_data *data;
390 int err = 0;
391
392 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
393 I2C_FUNC_SMBUS_WORD_DATA))
394 goto exit;
395
396 /* OK. For now, we presume we have a valid client. We now create the
397 client structure, even though we cannot fill it completely yet.
398 But it allows us to access gl518_{read,write}_value. */
399
ba9c2e8d 400 if (!(data = kzalloc(sizeof(struct gl518_data), GFP_KERNEL))) {
1da177e4
LT		 401 err = -ENOMEM;
402 goto exit;
403 }
1da177e4 404
a5955ed2
JD		 405 client = &data->client;
406 i2c_set_clientdata(client, data);
1da177e4 407
a5955ed2
JD		 408 client->addr = address;
409 client->adapter = adapter;
410 client->driver = &gl518_driver;
1da177e4
LT		 411
412 /* Now, we do the remaining detection. */
413
414 if (kind < 0) {
a5955ed2
JD		 415 if ((gl518_read_value(client, GL518_REG_CHIP_ID) != 0x80)
416 || (gl518_read_value(client, GL518_REG_CONF) & 0x80))
1da177e4
LT		 417 goto exit_free;
418 }
419
420 /* Determine the chip type. */
421 if (kind <= 0) {
a5955ed2 422 i = gl518_read_value(client, GL518_REG_REVISION);
1da177e4
LT		 423 if (i == 0x00) {
424 kind = gl518sm_r00;
425 } else if (i == 0x80) {
426 kind = gl518sm_r80;
427 } else {
428 if (kind <= 0)
429 dev_info(&adapter->dev,
430 "Ignoring 'force' parameter for unknown "
431 "chip at adapter %d, address 0x%02x\n",
432 i2c_adapter_id(adapter), address);
433 goto exit_free;
434 }
435 }
436
437 /* Fill in the remaining client fields */
a5955ed2 438 strlcpy(client->name, "gl518sm", I2C_NAME_SIZE);
1da177e4 439 data->type = kind;
9a61bf63 440 mutex_init(&data->update_lock);
1da177e4
LT		 441
442 /* Tell the I2C layer a new client has arrived */
a5955ed2 443 if ((err = i2c_attach_client(client)))
1da177e4
LT		 444 goto exit_free;
445
446 /* Initialize the GL518SM chip */
447 data->alarm_mask = 0xff;
448 data->voltage_in[0]=data->voltage_in[1]=data->voltage_in[2]=0;
a5955ed2 449 gl518_init_client(client);
1da177e4
LT		 450
451 /* Register sysfs hooks */
a5955ed2 452 if ((err = sysfs_create_group(&client->dev.kobj, &gl518_group)))
87808be4
JD		 453 goto exit_detach;
454
a5955ed2 455 data->hwmon_dev = hwmon_device_register(&client->dev);
1beeffe4
TJ		 456 if (IS_ERR(data->hwmon_dev)) {
457 err = PTR_ERR(data->hwmon_dev);
87808be4 458 goto exit_remove_files;
943b0830
MH		 459 }
460
1da177e4
LT		 461 return 0;
462
87808be4 463exit_remove_files:
a5955ed2 464 sysfs_remove_group(&client->dev.kobj, &gl518_group);
943b0830 465exit_detach:
a5955ed2 466 i2c_detach_client(client);
1da177e4
LT		 467exit_free:
468 kfree(data);
469exit:
470 return err;
471}
472
473
474/* Called when we have found a new GL518SM.
475 Note that we preserve D4:NoFan2 and D2:beep_enable. */
476static void gl518_init_client(struct i2c_client *client)
477{
478 /* Make sure we leave D7:Reset untouched */
479 u8 regvalue = gl518_read_value(client, GL518_REG_CONF) & 0x7f;
480
481 /* Comparator mode (D3=0), standby mode (D6=0) */
482 gl518_write_value(client, GL518_REG_CONF, (regvalue &= 0x37));
483
484 /* Never interrupts */
485 gl518_write_value(client, GL518_REG_MASK, 0x00);
486
487 /* Clear status register (D5=1), start (D6=1) */
488 gl518_write_value(client, GL518_REG_CONF, 0x20 | regvalue);
489 gl518_write_value(client, GL518_REG_CONF, 0x40 | regvalue);
490}
491
492static int gl518_detach_client(struct i2c_client *client)
493{
943b0830 494 struct gl518_data *data = i2c_get_clientdata(client);
1da177e4
LT		 495 int err;
496
1beeffe4 497 hwmon_device_unregister(data->hwmon_dev);
87808be4 498 sysfs_remove_group(&client->dev.kobj, &gl518_group);
943b0830 499
7bef5594 500 if ((err = i2c_detach_client(client)))
1da177e4 501 return err;
1da177e4 502
943b0830 503 kfree(data);
1da177e4
LT		 504 return 0;
505}
506
a5955ed2 507/* Registers 0x07 to 0x0c are word-sized, others are byte-sized
1da177e4 508 GL518 uses a high-byte first convention, which is exactly opposite to
a5955ed2 509 the SMBus standard. */
1da177e4
LT		 510static int gl518_read_value(struct i2c_client *client, u8 reg)
511{
512 if ((reg >= 0x07) && (reg <= 0x0c))
513 return swab16(i2c_smbus_read_word_data(client, reg));
514 else
515 return i2c_smbus_read_byte_data(client, reg);
516}
517
1da177e4
LT		 518static int gl518_write_value(struct i2c_client *client, u8 reg, u16 value)
519{
520 if ((reg >= 0x07) && (reg <= 0x0c))
521 return i2c_smbus_write_word_data(client, reg, swab16(value));
522 else
523 return i2c_smbus_write_byte_data(client, reg, value);
524}
525
526static struct gl518_data *gl518_update_device(struct device *dev)
527{
528 struct i2c_client *client = to_i2c_client(dev);
529 struct gl518_data *data = i2c_get_clientdata(client);
530 int val;
531
9a61bf63 532 mutex_lock(&data->update_lock);
1da177e4
LT		 533
534 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
535 || !data->valid) {
536 dev_dbg(&client->dev, "Starting gl518 update\n");
537
538 data->alarms = gl518_read_value(client, GL518_REG_INT);
539 data->beep_mask = gl518_read_value(client, GL518_REG_ALARM);
540
541 val = gl518_read_value(client, GL518_REG_VDD_LIMIT);
542 data->voltage_min[0] = val & 0xff;
543 data->voltage_max[0] = (val >> 8) & 0xff;
544 val = gl518_read_value(client, GL518_REG_VIN1_LIMIT);
545 data->voltage_min[1] = val & 0xff;
546 data->voltage_max[1] = (val >> 8) & 0xff;
547 val = gl518_read_value(client, GL518_REG_VIN2_LIMIT);
548 data->voltage_min[2] = val & 0xff;
549 data->voltage_max[2] = (val >> 8) & 0xff;
550 val = gl518_read_value(client, GL518_REG_VIN3_LIMIT);
551 data->voltage_min[3] = val & 0xff;
552 data->voltage_max[3] = (val >> 8) & 0xff;
553
554 val = gl518_read_value(client, GL518_REG_FAN_COUNT);
555 data->fan_in[0] = (val >> 8) & 0xff;
556 data->fan_in[1] = val & 0xff;
557
558 val = gl518_read_value(client, GL518_REG_FAN_LIMIT);
559 data->fan_min[0] = (val >> 8) & 0xff;
560 data->fan_min[1] = val & 0xff;
561
562 data->temp_in = gl518_read_value(client, GL518_REG_TEMP_IN);
563 data->temp_max =
564 gl518_read_value(client, GL518_REG_TEMP_MAX);
565 data->temp_hyst =
566 gl518_read_value(client, GL518_REG_TEMP_HYST);
567
568 val = gl518_read_value(client, GL518_REG_MISC);
569 data->fan_div[0] = (val >> 6) & 0x03;
570 data->fan_div[1] = (val >> 4) & 0x03;
571 data->fan_auto1 = (val >> 3) & 0x01;
572
573 data->alarms &= data->alarm_mask;
574
575 val = gl518_read_value(client, GL518_REG_CONF);
576 data->beep_enable = (val >> 2) & 1;
577
578 if (data->type != gl518sm_r00) {
579 data->voltage_in[0] =
580 gl518_read_value(client, GL518_REG_VDD);
581 data->voltage_in[1] =
582 gl518_read_value(client, GL518_REG_VIN1);
583 data->voltage_in[2] =
584 gl518_read_value(client, GL518_REG_VIN2);
585 }
586 data->voltage_in[3] =
587 gl518_read_value(client, GL518_REG_VIN3);
588
589 data->last_updated = jiffies;
590 data->valid = 1;
591 }
592
9a61bf63 593 mutex_unlock(&data->update_lock);
1da177e4
LT		 594
595 return data;
596}
597
598static int __init sensors_gl518sm_init(void)
599{
600 return i2c_add_driver(&gl518_driver);
601}
602
603static void __exit sensors_gl518sm_exit(void)
604{
605 i2c_del_driver(&gl518_driver);
606}
607
608MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
609 "Kyosti Malkki <kmalkki@cc.hut.fi> and "
610 "Hong-Gunn Chew <hglinux@gunnet.org>");
611MODULE_DESCRIPTION("GL518SM driver");
612MODULE_LICENSE("GPL");
613
614module_init(sensors_gl518sm_init);
615module_exit(sensors_gl518sm_exit);
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