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befs: Validate length of long symbolic links.
[linux-2.6/kvm.git] / drivers / hwmon / w83781d.c
blobeed43a008be1c7acaa45ea18a26f97ba27b5025f
1 /*
2 w83781d.c - Part of lm_sensors, Linux kernel modules for hardware
3 monitoring
4 Copyright (c) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>,
5 Philip Edelbrock <phil@netroedge.com>,
6 and Mark Studebaker <mdsxyz123@yahoo.com>
7 Copyright (c) 2007 - 2008 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
24 /*
25 Supports following chips:
26
27 Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
28 as99127f 7 3 0 3 0x31 0x12c3 yes no
29 as99127f rev.2 (type_name = as99127f) 0x31 0x5ca3 yes no
30 w83781d 7 3 0 3 0x10-1 0x5ca3 yes yes
31 w83782d 9 3 2-4 3 0x30 0x5ca3 yes yes
32 w83783s 5-6 3 2 1-2 0x40 0x5ca3 yes no
33
34 */
35
36 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
37
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/slab.h>
41 #include <linux/jiffies.h>
42 #include <linux/i2c.h>
43 #include <linux/hwmon.h>
44 #include <linux/hwmon-vid.h>
45 #include <linux/hwmon-sysfs.h>
46 #include <linux/sysfs.h>
47 #include <linux/err.h>
48 #include <linux/mutex.h>
49
50 #ifdef CONFIG_ISA
51 #include <linux/platform_device.h>
52 #include <linux/ioport.h>
53 #include <linux/io.h>
54 #endif
55
56 #include "lm75.h"
57
58 /* Addresses to scan */
59 static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
60 0x2e, 0x2f, I2C_CLIENT_END };
61
62 enum chips { w83781d, w83782d, w83783s, as99127f };
63
64 /* Insmod parameters */
65 static unsigned short force_subclients[4];
66 module_param_array(force_subclients, short, NULL, 0);
67 MODULE_PARM_DESC(force_subclients, "List of subclient addresses: "
68 "{bus, clientaddr, subclientaddr1, subclientaddr2}");
69
70 static int reset;
71 module_param(reset, bool, 0);
72 MODULE_PARM_DESC(reset, "Set to one to reset chip on load");
73
74 static int init = 1;
75 module_param(init, bool, 0);
76 MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization");
77
78 /* Constants specified below */
79
80 /* Length of ISA address segment */
81 #define W83781D_EXTENT 8
82
83 /* Where are the ISA address/data registers relative to the base address */
84 #define W83781D_ADDR_REG_OFFSET 5
85 #define W83781D_DATA_REG_OFFSET 6
86
87 /* The device registers */
88 /* in nr from 0 to 8 */
89 #define W83781D_REG_IN_MAX(nr) ((nr < 7) ? (0x2b + (nr) * 2) : \
90 (0x554 + (((nr) - 7) * 2)))
91 #define W83781D_REG_IN_MIN(nr) ((nr < 7) ? (0x2c + (nr) * 2) : \
92 (0x555 + (((nr) - 7) * 2)))
93 #define W83781D_REG_IN(nr) ((nr < 7) ? (0x20 + (nr)) : \
94 (0x550 + (nr) - 7))
95
96 /* fan nr from 0 to 2 */
97 #define W83781D_REG_FAN_MIN(nr) (0x3b + (nr))
98 #define W83781D_REG_FAN(nr) (0x28 + (nr))
99
100 #define W83781D_REG_BANK 0x4E
101 #define W83781D_REG_TEMP2_CONFIG 0x152
102 #define W83781D_REG_TEMP3_CONFIG 0x252
103 /* temp nr from 1 to 3 */
104 #define W83781D_REG_TEMP(nr) ((nr == 3) ? (0x0250) : \
105 ((nr == 2) ? (0x0150) : \
106 (0x27)))
107 #define W83781D_REG_TEMP_HYST(nr) ((nr == 3) ? (0x253) : \
108 ((nr == 2) ? (0x153) : \
109 (0x3A)))
110 #define W83781D_REG_TEMP_OVER(nr) ((nr == 3) ? (0x255) : \
111 ((nr == 2) ? (0x155) : \
112 (0x39)))
113
114 #define W83781D_REG_CONFIG 0x40
115
116 /* Interrupt status (W83781D, AS99127F) */
117 #define W83781D_REG_ALARM1 0x41
118 #define W83781D_REG_ALARM2 0x42
119
120 /* Real-time status (W83782D, W83783S) */
121 #define W83782D_REG_ALARM1 0x459
122 #define W83782D_REG_ALARM2 0x45A
123 #define W83782D_REG_ALARM3 0x45B
124
125 #define W83781D_REG_BEEP_CONFIG 0x4D
126 #define W83781D_REG_BEEP_INTS1 0x56
127 #define W83781D_REG_BEEP_INTS2 0x57
128 #define W83781D_REG_BEEP_INTS3 0x453 /* not on W83781D */
129
130 #define W83781D_REG_VID_FANDIV 0x47
131
132 #define W83781D_REG_CHIPID 0x49
133 #define W83781D_REG_WCHIPID 0x58
134 #define W83781D_REG_CHIPMAN 0x4F
135 #define W83781D_REG_PIN 0x4B
136
137 /* 782D/783S only */
138 #define W83781D_REG_VBAT 0x5D
139
140 /* PWM 782D (1-4) and 783S (1-2) only */
141 static const u8 W83781D_REG_PWM[] = { 0x5B, 0x5A, 0x5E, 0x5F };
142 #define W83781D_REG_PWMCLK12 0x5C
143 #define W83781D_REG_PWMCLK34 0x45C
144
145 #define W83781D_REG_I2C_ADDR 0x48
146 #define W83781D_REG_I2C_SUBADDR 0x4A
147
148 /* The following are undocumented in the data sheets however we
149 received the information in an email from Winbond tech support */
150 /* Sensor selection - not on 781d */
151 #define W83781D_REG_SCFG1 0x5D
152 static const u8 BIT_SCFG1[] = { 0x02, 0x04, 0x08 };
153
154 #define W83781D_REG_SCFG2 0x59
155 static const u8 BIT_SCFG2[] = { 0x10, 0x20, 0x40 };
156
157 #define W83781D_DEFAULT_BETA 3435
158
159 /* Conversions */
160 #define IN_TO_REG(val) SENSORS_LIMIT(((val) + 8) / 16, 0, 255)
161 #define IN_FROM_REG(val) ((val) * 16)
162
163 static inline u8
164 FAN_TO_REG(long rpm, int div)
165 {
166 if (rpm == 0)
167 return 255;
168 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
169 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
170 }
171
172 static inline long
173 FAN_FROM_REG(u8 val, int div)
174 {
175 if (val == 0)
176 return -1;
177 if (val == 255)
178 return 0;
179 return 1350000 / (val * div);
180 }
181
182 #define TEMP_TO_REG(val) SENSORS_LIMIT((val) / 1000, -127, 128)
183 #define TEMP_FROM_REG(val) ((val) * 1000)
184
185 #define BEEP_MASK_FROM_REG(val,type) ((type) == as99127f ? \
186 (~(val)) & 0x7fff : (val) & 0xff7fff)
187 #define BEEP_MASK_TO_REG(val,type) ((type) == as99127f ? \
188 (~(val)) & 0x7fff : (val) & 0xff7fff)
189
190 #define DIV_FROM_REG(val) (1 << (val))
191
192 static inline u8
193 DIV_TO_REG(long val, enum chips type)
194 {
195 int i;
196 val = SENSORS_LIMIT(val, 1,
197 ((type == w83781d
198 || type == as99127f) ? 8 : 128)) >> 1;
199 for (i = 0; i < 7; i++) {
200 if (val == 0)
201 break;
202 val >>= 1;
203 }
204 return i;
205 }
206
207 struct w83781d_data {
208 struct i2c_client *client;
209 struct device *hwmon_dev;
210 struct mutex lock;
211 enum chips type;
212
213 /* For ISA device only */
214 const char *name;
215 int isa_addr;
216
217 struct mutex update_lock;
218 char valid; /* !=0 if following fields are valid */
219 unsigned long last_updated; /* In jiffies */
220
221 struct i2c_client *lm75[2]; /* for secondary I2C addresses */
222 /* array of 2 pointers to subclients */
223
224 u8 in[9]; /* Register value - 8 & 9 for 782D only */
225 u8 in_max[9]; /* Register value - 8 & 9 for 782D only */
226 u8 in_min[9]; /* Register value - 8 & 9 for 782D only */
227 u8 fan[3]; /* Register value */
228 u8 fan_min[3]; /* Register value */
229 s8 temp; /* Register value */
230 s8 temp_max; /* Register value */
231 s8 temp_max_hyst; /* Register value */
232 u16 temp_add[2]; /* Register value */
233 u16 temp_max_add[2]; /* Register value */
234 u16 temp_max_hyst_add[2]; /* Register value */
235 u8 fan_div[3]; /* Register encoding, shifted right */
236 u8 vid; /* Register encoding, combined */
237 u32 alarms; /* Register encoding, combined */
238 u32 beep_mask; /* Register encoding, combined */
239 u8 pwm[4]; /* Register value */
240 u8 pwm2_enable; /* Boolean */
241 u16 sens[3]; /* 782D/783S only.
242 1 = pentium diode; 2 = 3904 diode;
243 4 = thermistor */
244 u8 vrm;
245 };
246
247 static struct w83781d_data *w83781d_data_if_isa(void);
248 static int w83781d_alias_detect(struct i2c_client *client, u8 chipid);
249
250 static int w83781d_read_value(struct w83781d_data *data, u16 reg);
251 static int w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value);
252 static struct w83781d_data *w83781d_update_device(struct device *dev);
253 static void w83781d_init_device(struct device *dev);
254
255 /* following are the sysfs callback functions */
256 #define show_in_reg(reg) \
257 static ssize_t show_##reg (struct device *dev, struct device_attribute *da, \
258 char *buf) \
259 { \
260 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
261 struct w83781d_data *data = w83781d_update_device(dev); \
262 return sprintf(buf, "%ld\n", \
263 (long)IN_FROM_REG(data->reg[attr->index])); \
264 }
265 show_in_reg(in);
266 show_in_reg(in_min);
267 show_in_reg(in_max);
268
269 #define store_in_reg(REG, reg) \
270 static ssize_t store_in_##reg (struct device *dev, struct device_attribute \
271 *da, const char *buf, size_t count) \
272 { \
273 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
274 struct w83781d_data *data = dev_get_drvdata(dev); \
275 int nr = attr->index; \
276 u32 val; \
277 \
278 val = simple_strtoul(buf, NULL, 10); \
279 \
280 mutex_lock(&data->update_lock); \
281 data->in_##reg[nr] = IN_TO_REG(val); \
282 w83781d_write_value(data, W83781D_REG_IN_##REG(nr), data->in_##reg[nr]); \
283 \
284 mutex_unlock(&data->update_lock); \
285 return count; \
286 }
287 store_in_reg(MIN, min);
288 store_in_reg(MAX, max);
289
290 #define sysfs_in_offsets(offset) \
291 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
292 show_in, NULL, offset); \
293 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
294 show_in_min, store_in_min, offset); \
295 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
296 show_in_max, store_in_max, offset)
297
298 sysfs_in_offsets(0);
299 sysfs_in_offsets(1);
300 sysfs_in_offsets(2);
301 sysfs_in_offsets(3);
302 sysfs_in_offsets(4);
303 sysfs_in_offsets(5);
304 sysfs_in_offsets(6);
305 sysfs_in_offsets(7);
306 sysfs_in_offsets(8);
307
308 #define show_fan_reg(reg) \
309 static ssize_t show_##reg (struct device *dev, struct device_attribute *da, \
310 char *buf) \
311 { \
312 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
313 struct w83781d_data *data = w83781d_update_device(dev); \
314 return sprintf(buf,"%ld\n", \
315 FAN_FROM_REG(data->reg[attr->index], \
316 DIV_FROM_REG(data->fan_div[attr->index]))); \
317 }
318 show_fan_reg(fan);
319 show_fan_reg(fan_min);
320
321 static ssize_t
322 store_fan_min(struct device *dev, struct device_attribute *da,
323 const char *buf, size_t count)
324 {
325 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
326 struct w83781d_data *data = dev_get_drvdata(dev);
327 int nr = attr->index;
328 u32 val;
329
330 val = simple_strtoul(buf, NULL, 10);
331
332 mutex_lock(&data->update_lock);
333 data->fan_min[nr] =
334 FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
335 w83781d_write_value(data, W83781D_REG_FAN_MIN(nr),
336 data->fan_min[nr]);
337
338 mutex_unlock(&data->update_lock);
339 return count;
340 }
341
342 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
343 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
344 show_fan_min, store_fan_min, 0);
345 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
346 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
347 show_fan_min, store_fan_min, 1);
348 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
349 static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO | S_IWUSR,
350 show_fan_min, store_fan_min, 2);
351
352 #define show_temp_reg(reg) \
353 static ssize_t show_##reg (struct device *dev, struct device_attribute *da, \
354 char *buf) \
355 { \
356 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
357 struct w83781d_data *data = w83781d_update_device(dev); \
358 int nr = attr->index; \
359 if (nr >= 2) { /* TEMP2 and TEMP3 */ \
360 return sprintf(buf,"%d\n", \
361 LM75_TEMP_FROM_REG(data->reg##_add[nr-2])); \
362 } else { /* TEMP1 */ \
363 return sprintf(buf,"%ld\n", (long)TEMP_FROM_REG(data->reg)); \
364 } \
365 }
366 show_temp_reg(temp);
367 show_temp_reg(temp_max);
368 show_temp_reg(temp_max_hyst);
369
370 #define store_temp_reg(REG, reg) \
371 static ssize_t store_temp_##reg (struct device *dev, \
372 struct device_attribute *da, const char *buf, size_t count) \
373 { \
374 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
375 struct w83781d_data *data = dev_get_drvdata(dev); \
376 int nr = attr->index; \
377 long val; \
378 \
379 val = simple_strtol(buf, NULL, 10); \
380 \
381 mutex_lock(&data->update_lock); \
382 \
383 if (nr >= 2) { /* TEMP2 and TEMP3 */ \
384 data->temp_##reg##_add[nr-2] = LM75_TEMP_TO_REG(val); \
385 w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \
386 data->temp_##reg##_add[nr-2]); \
387 } else { /* TEMP1 */ \
388 data->temp_##reg = TEMP_TO_REG(val); \
389 w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \
390 data->temp_##reg); \
391 } \
392 \
393 mutex_unlock(&data->update_lock); \
394 return count; \
395 }
396 store_temp_reg(OVER, max);
397 store_temp_reg(HYST, max_hyst);
398
399 #define sysfs_temp_offsets(offset) \
400 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
401 show_temp, NULL, offset); \
402 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
403 show_temp_max, store_temp_max, offset); \
404 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
405 show_temp_max_hyst, store_temp_max_hyst, offset);
406
407 sysfs_temp_offsets(1);
408 sysfs_temp_offsets(2);
409 sysfs_temp_offsets(3);
410
411 static ssize_t
412 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
413 {
414 struct w83781d_data *data = w83781d_update_device(dev);
415 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
416 }
417
418 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
419
420 static ssize_t
421 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
422 {
423 struct w83781d_data *data = dev_get_drvdata(dev);
424 return sprintf(buf, "%ld\n", (long) data->vrm);
425 }
426
427 static ssize_t
428 store_vrm_reg(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
429 {
430 struct w83781d_data *data = dev_get_drvdata(dev);
431 u32 val;
432
433 val = simple_strtoul(buf, NULL, 10);
434 data->vrm = val;
435
436 return count;
437 }
438
439 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
440
441 static ssize_t
442 show_alarms_reg(struct device *dev, struct device_attribute *attr, char *buf)
443 {
444 struct w83781d_data *data = w83781d_update_device(dev);
445 return sprintf(buf, "%u\n", data->alarms);
446 }
447
448 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
449
450 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
451 char *buf)
452 {
453 struct w83781d_data *data = w83781d_update_device(dev);
454 int bitnr = to_sensor_dev_attr(attr)->index;
455 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
456 }
457
458 /* The W83781D has a single alarm bit for temp2 and temp3 */
459 static ssize_t show_temp3_alarm(struct device *dev,
460 struct device_attribute *attr, char *buf)
461 {
462 struct w83781d_data *data = w83781d_update_device(dev);
463 int bitnr = (data->type == w83781d) ? 5 : 13;
464 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
465 }
466
467 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
468 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
469 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
470 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
471 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
472 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
473 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10);
474 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 16);
475 static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 17);
476 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
477 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
478 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11);
479 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
480 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
481 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_temp3_alarm, NULL, 0);
482
483 static ssize_t show_beep_mask (struct device *dev, struct device_attribute *attr, char *buf)
484 {
485 struct w83781d_data *data = w83781d_update_device(dev);
486 return sprintf(buf, "%ld\n",
487 (long)BEEP_MASK_FROM_REG(data->beep_mask, data->type));
488 }
489
490 static ssize_t
491 store_beep_mask(struct device *dev, struct device_attribute *attr,
492 const char *buf, size_t count)
493 {
494 struct w83781d_data *data = dev_get_drvdata(dev);
495 u32 val;
496
497 val = simple_strtoul(buf, NULL, 10);
498
499 mutex_lock(&data->update_lock);
500 data->beep_mask &= 0x8000; /* preserve beep enable */
501 data->beep_mask |= BEEP_MASK_TO_REG(val, data->type);
502 w83781d_write_value(data, W83781D_REG_BEEP_INTS1,
503 data->beep_mask & 0xff);
504 w83781d_write_value(data, W83781D_REG_BEEP_INTS2,
505 (data->beep_mask >> 8) & 0xff);
506 if (data->type != w83781d && data->type != as99127f) {
507 w83781d_write_value(data, W83781D_REG_BEEP_INTS3,
508 ((data->beep_mask) >> 16) & 0xff);
509 }
510 mutex_unlock(&data->update_lock);
511
512 return count;
513 }
514
515 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
516 show_beep_mask, store_beep_mask);
517
518 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
519 char *buf)
520 {
521 struct w83781d_data *data = w83781d_update_device(dev);
522 int bitnr = to_sensor_dev_attr(attr)->index;
523 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
524 }
525
526 static ssize_t
527 store_beep(struct device *dev, struct device_attribute *attr,
528 const char *buf, size_t count)
529 {
530 struct w83781d_data *data = dev_get_drvdata(dev);
531 int bitnr = to_sensor_dev_attr(attr)->index;
532 unsigned long bit;
533 u8 reg;
534
535 bit = simple_strtoul(buf, NULL, 10);
536 if (bit & ~1)
537 return -EINVAL;
538
539 mutex_lock(&data->update_lock);
540 if (bit)
541 data->beep_mask |= (1 << bitnr);
542 else
543 data->beep_mask &= ~(1 << bitnr);
544
545 if (bitnr < 8) {
546 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS1);
547 if (bit)
548 reg |= (1 << bitnr);
549 else
550 reg &= ~(1 << bitnr);
551 w83781d_write_value(data, W83781D_REG_BEEP_INTS1, reg);
552 } else if (bitnr < 16) {
553 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS2);
554 if (bit)
555 reg |= (1 << (bitnr - 8));
556 else
557 reg &= ~(1 << (bitnr - 8));
558 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, reg);
559 } else {
560 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS3);
561 if (bit)
562 reg |= (1 << (bitnr - 16));
563 else
564 reg &= ~(1 << (bitnr - 16));
565 w83781d_write_value(data, W83781D_REG_BEEP_INTS3, reg);
566 }
567 mutex_unlock(&data->update_lock);
568
569 return count;
570 }
571
572 /* The W83781D has a single beep bit for temp2 and temp3 */
573 static ssize_t show_temp3_beep(struct device *dev,
574 struct device_attribute *attr, char *buf)
575 {
576 struct w83781d_data *data = w83781d_update_device(dev);
577 int bitnr = (data->type == w83781d) ? 5 : 13;
578 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
579 }
580
581 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
582 show_beep, store_beep, 0);
583 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR,
584 show_beep, store_beep, 1);
585 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR,
586 show_beep, store_beep, 2);
587 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR,
588 show_beep, store_beep, 3);
589 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR,
590 show_beep, store_beep, 8);
591 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO | S_IWUSR,
592 show_beep, store_beep, 9);
593 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO | S_IWUSR,
594 show_beep, store_beep, 10);
595 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO | S_IWUSR,
596 show_beep, store_beep, 16);
597 static SENSOR_DEVICE_ATTR(in8_beep, S_IRUGO | S_IWUSR,
598 show_beep, store_beep, 17);
599 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR,
600 show_beep, store_beep, 6);
601 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR,
602 show_beep, store_beep, 7);
603 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO | S_IWUSR,
604 show_beep, store_beep, 11);
605 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
606 show_beep, store_beep, 4);
607 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR,
608 show_beep, store_beep, 5);
609 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO,
610 show_temp3_beep, store_beep, 13);
611 static SENSOR_DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
612 show_beep, store_beep, 15);
613
614 static ssize_t
615 show_fan_div(struct device *dev, struct device_attribute *da, char *buf)
616 {
617 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
618 struct w83781d_data *data = w83781d_update_device(dev);
619 return sprintf(buf, "%ld\n",
620 (long) DIV_FROM_REG(data->fan_div[attr->index]));
621 }
622
623 /* Note: we save and restore the fan minimum here, because its value is
624 determined in part by the fan divisor. This follows the principle of
625 least surprise; the user doesn't expect the fan minimum to change just
626 because the divisor changed. */
627 static ssize_t
628 store_fan_div(struct device *dev, struct device_attribute *da,
629 const char *buf, size_t count)
630 {
631 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
632 struct w83781d_data *data = dev_get_drvdata(dev);
633 unsigned long min;
634 int nr = attr->index;
635 u8 reg;
636 unsigned long val = simple_strtoul(buf, NULL, 10);
637
638 mutex_lock(&data->update_lock);
639
640 /* Save fan_min */
641 min = FAN_FROM_REG(data->fan_min[nr],
642 DIV_FROM_REG(data->fan_div[nr]));
643
644 data->fan_div[nr] = DIV_TO_REG(val, data->type);
645
646 reg = (w83781d_read_value(data, nr==2 ? W83781D_REG_PIN : W83781D_REG_VID_FANDIV)
647 & (nr==0 ? 0xcf : 0x3f))
648 | ((data->fan_div[nr] & 0x03) << (nr==0 ? 4 : 6));
649 w83781d_write_value(data, nr==2 ? W83781D_REG_PIN : W83781D_REG_VID_FANDIV, reg);
650
651 /* w83781d and as99127f don't have extended divisor bits */
652 if (data->type != w83781d && data->type != as99127f) {
653 reg = (w83781d_read_value(data, W83781D_REG_VBAT)
654 & ~(1 << (5 + nr)))
655 | ((data->fan_div[nr] & 0x04) << (3 + nr));
656 w83781d_write_value(data, W83781D_REG_VBAT, reg);
657 }
658
659 /* Restore fan_min */
660 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
661 w83781d_write_value(data, W83781D_REG_FAN_MIN(nr), data->fan_min[nr]);
662
663 mutex_unlock(&data->update_lock);
664 return count;
665 }
666
667 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
668 show_fan_div, store_fan_div, 0);
669 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
670 show_fan_div, store_fan_div, 1);
671 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR,
672 show_fan_div, store_fan_div, 2);
673
674 static ssize_t
675 show_pwm(struct device *dev, struct device_attribute *da, char *buf)
676 {
677 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
678 struct w83781d_data *data = w83781d_update_device(dev);
679 return sprintf(buf, "%d\n", (int)data->pwm[attr->index]);
680 }
681
682 static ssize_t
683 show_pwm2_enable(struct device *dev, struct device_attribute *da, char *buf)
684 {
685 struct w83781d_data *data = w83781d_update_device(dev);
686 return sprintf(buf, "%d\n", (int)data->pwm2_enable);
687 }
688
689 static ssize_t
690 store_pwm(struct device *dev, struct device_attribute *da, const char *buf,
691 size_t count)
692 {
693 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
694 struct w83781d_data *data = dev_get_drvdata(dev);
695 int nr = attr->index;
696 u32 val;
697
698 val = simple_strtoul(buf, NULL, 10);
699
700 mutex_lock(&data->update_lock);
701 data->pwm[nr] = SENSORS_LIMIT(val, 0, 255);
702 w83781d_write_value(data, W83781D_REG_PWM[nr], data->pwm[nr]);
703 mutex_unlock(&data->update_lock);
704 return count;
705 }
706
707 static ssize_t
708 store_pwm2_enable(struct device *dev, struct device_attribute *da,
709 const char *buf, size_t count)
710 {
711 struct w83781d_data *data = dev_get_drvdata(dev);
712 u32 val, reg;
713
714 val = simple_strtoul(buf, NULL, 10);
715
716 mutex_lock(&data->update_lock);
717
718 switch (val) {
719 case 0:
720 case 1:
721 reg = w83781d_read_value(data, W83781D_REG_PWMCLK12);
722 w83781d_write_value(data, W83781D_REG_PWMCLK12,
723 (reg & 0xf7) | (val << 3));
724
725 reg = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
726 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG,
727 (reg & 0xef) | (!val << 4));
728
729 data->pwm2_enable = val;
730 break;
731
732 default:
733 mutex_unlock(&data->update_lock);
734 return -EINVAL;
735 }
736
737 mutex_unlock(&data->update_lock);
738 return count;
739 }
740
741 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0);
742 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 1);
743 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 2);
744 static SENSOR_DEVICE_ATTR(pwm4, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 3);
745 /* only PWM2 can be enabled/disabled */
746 static DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR,
747 show_pwm2_enable, store_pwm2_enable);
748
749 static ssize_t
750 show_sensor(struct device *dev, struct device_attribute *da, char *buf)
751 {
752 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
753 struct w83781d_data *data = w83781d_update_device(dev);
754 return sprintf(buf, "%d\n", (int)data->sens[attr->index]);
755 }
756
757 static ssize_t
758 store_sensor(struct device *dev, struct device_attribute *da,
759 const char *buf, size_t count)
760 {
761 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
762 struct w83781d_data *data = dev_get_drvdata(dev);
763 int nr = attr->index;
764 u32 val, tmp;
765
766 val = simple_strtoul(buf, NULL, 10);
767
768 mutex_lock(&data->update_lock);
769
770 switch (val) {
771 case 1: /* PII/Celeron diode */
772 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
773 w83781d_write_value(data, W83781D_REG_SCFG1,
774 tmp | BIT_SCFG1[nr]);
775 tmp = w83781d_read_value(data, W83781D_REG_SCFG2);
776 w83781d_write_value(data, W83781D_REG_SCFG2,
777 tmp | BIT_SCFG2[nr]);
778 data->sens[nr] = val;
779 break;
780 case 2: /* 3904 */
781 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
782 w83781d_write_value(data, W83781D_REG_SCFG1,
783 tmp | BIT_SCFG1[nr]);
784 tmp = w83781d_read_value(data, W83781D_REG_SCFG2);
785 w83781d_write_value(data, W83781D_REG_SCFG2,
786 tmp & ~BIT_SCFG2[nr]);
787 data->sens[nr] = val;
788 break;
789 case W83781D_DEFAULT_BETA:
790 dev_warn(dev, "Sensor type %d is deprecated, please use 4 "
791 "instead\n", W83781D_DEFAULT_BETA);
792 /* fall through */
793 case 4: /* thermistor */
794 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
795 w83781d_write_value(data, W83781D_REG_SCFG1,
796 tmp & ~BIT_SCFG1[nr]);
797 data->sens[nr] = val;
798 break;
799 default:
800 dev_err(dev, "Invalid sensor type %ld; must be 1, 2, or 4\n",
801 (long) val);
802 break;
803 }
804
805 mutex_unlock(&data->update_lock);
806 return count;
807 }
808
809 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR,
810 show_sensor, store_sensor, 0);
811 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR,
812 show_sensor, store_sensor, 1);
813 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR,
814 show_sensor, store_sensor, 2);
815
816 /* Assumes that adapter is of I2C, not ISA variety.
817 * OTHERWISE DON'T CALL THIS
818 */
819 static int
820 w83781d_detect_subclients(struct i2c_client *new_client)
821 {
822 int i, val1 = 0, id;
823 int err;
824 int address = new_client->addr;
825 unsigned short sc_addr[2];
826 struct i2c_adapter *adapter = new_client->adapter;
827 struct w83781d_data *data = i2c_get_clientdata(new_client);
828 enum chips kind = data->type;
829
830 id = i2c_adapter_id(adapter);
831
832 if (force_subclients[0] == id && force_subclients[1] == address) {
833 for (i = 2; i <= 3; i++) {
834 if (force_subclients[i] < 0x48 ||
835 force_subclients[i] > 0x4f) {
836 dev_err(&new_client->dev, "Invalid subclient "
837 "address %d; must be 0x48-0x4f\n",
838 force_subclients[i]);
839 err = -EINVAL;
840 goto ERROR_SC_1;
841 }
842 }
843 w83781d_write_value(data, W83781D_REG_I2C_SUBADDR,
844 (force_subclients[2] & 0x07) |
845 ((force_subclients[3] & 0x07) << 4));
846 sc_addr[0] = force_subclients[2];
847 } else {
848 val1 = w83781d_read_value(data, W83781D_REG_I2C_SUBADDR);
849 sc_addr[0] = 0x48 + (val1 & 0x07);
850 }
851
852 if (kind != w83783s) {
853 if (force_subclients[0] == id &&
854 force_subclients[1] == address) {
855 sc_addr[1] = force_subclients[3];
856 } else {
857 sc_addr[1] = 0x48 + ((val1 >> 4) & 0x07);
858 }
859 if (sc_addr[0] == sc_addr[1]) {
860 dev_err(&new_client->dev,
861 "Duplicate addresses 0x%x for subclients.\n",
862 sc_addr[0]);
863 err = -EBUSY;
864 goto ERROR_SC_2;
865 }
866 }
867
868 for (i = 0; i <= 1; i++) {
869 data->lm75[i] = i2c_new_dummy(adapter, sc_addr[i]);
870 if (!data->lm75[i]) {
871 dev_err(&new_client->dev, "Subclient %d "
872 "registration at address 0x%x "
873 "failed.\n", i, sc_addr[i]);
874 err = -ENOMEM;
875 if (i == 1)
876 goto ERROR_SC_3;
877 goto ERROR_SC_2;
878 }
879 if (kind == w83783s)
880 break;
881 }
882
883 return 0;
884
885 /* Undo inits in case of errors */
886 ERROR_SC_3:
887 i2c_unregister_device(data->lm75[0]);
888 ERROR_SC_2:
889 ERROR_SC_1:
890 return err;
891 }
892
893 #define IN_UNIT_ATTRS(X) \
894 &sensor_dev_attr_in##X##_input.dev_attr.attr, \
895 &sensor_dev_attr_in##X##_min.dev_attr.attr, \
896 &sensor_dev_attr_in##X##_max.dev_attr.attr, \
897 &sensor_dev_attr_in##X##_alarm.dev_attr.attr, \
898 &sensor_dev_attr_in##X##_beep.dev_attr.attr
899
900 #define FAN_UNIT_ATTRS(X) \
901 &sensor_dev_attr_fan##X##_input.dev_attr.attr, \
902 &sensor_dev_attr_fan##X##_min.dev_attr.attr, \
903 &sensor_dev_attr_fan##X##_div.dev_attr.attr, \
904 &sensor_dev_attr_fan##X##_alarm.dev_attr.attr, \
905 &sensor_dev_attr_fan##X##_beep.dev_attr.attr
906
907 #define TEMP_UNIT_ATTRS(X) \
908 &sensor_dev_attr_temp##X##_input.dev_attr.attr, \
909 &sensor_dev_attr_temp##X##_max.dev_attr.attr, \
910 &sensor_dev_attr_temp##X##_max_hyst.dev_attr.attr, \
911 &sensor_dev_attr_temp##X##_alarm.dev_attr.attr, \
912 &sensor_dev_attr_temp##X##_beep.dev_attr.attr
913
914 static struct attribute* w83781d_attributes[] = {
915 IN_UNIT_ATTRS(0),
916 IN_UNIT_ATTRS(2),
917 IN_UNIT_ATTRS(3),
918 IN_UNIT_ATTRS(4),
919 IN_UNIT_ATTRS(5),
920 IN_UNIT_ATTRS(6),
921 FAN_UNIT_ATTRS(1),
922 FAN_UNIT_ATTRS(2),
923 FAN_UNIT_ATTRS(3),
924 TEMP_UNIT_ATTRS(1),
925 TEMP_UNIT_ATTRS(2),
926 &dev_attr_cpu0_vid.attr,
927 &dev_attr_vrm.attr,
928 &dev_attr_alarms.attr,
929 &dev_attr_beep_mask.attr,
930 &sensor_dev_attr_beep_enable.dev_attr.attr,
931 NULL
932 };
933 static const struct attribute_group w83781d_group = {
934 .attrs = w83781d_attributes,
935 };
936
937 static struct attribute *w83781d_attributes_opt[] = {
938 IN_UNIT_ATTRS(1),
939 IN_UNIT_ATTRS(7),
940 IN_UNIT_ATTRS(8),
941 TEMP_UNIT_ATTRS(3),
942 &sensor_dev_attr_pwm1.dev_attr.attr,
943 &sensor_dev_attr_pwm2.dev_attr.attr,
944 &sensor_dev_attr_pwm3.dev_attr.attr,
945 &sensor_dev_attr_pwm4.dev_attr.attr,
946 &dev_attr_pwm2_enable.attr,
947 &sensor_dev_attr_temp1_type.dev_attr.attr,
948 &sensor_dev_attr_temp2_type.dev_attr.attr,
949 &sensor_dev_attr_temp3_type.dev_attr.attr,
950 NULL
951 };
952 static const struct attribute_group w83781d_group_opt = {
953 .attrs = w83781d_attributes_opt,
954 };
955
956 /* No clean up is done on error, it's up to the caller */
957 static int
958 w83781d_create_files(struct device *dev, int kind, int is_isa)
959 {
960 int err;
961
962 if ((err = sysfs_create_group(&dev->kobj, &w83781d_group)))
963 return err;
964
965 if (kind != w83783s) {
966 if ((err = device_create_file(dev,
967 &sensor_dev_attr_in1_input.dev_attr))
968 || (err = device_create_file(dev,
969 &sensor_dev_attr_in1_min.dev_attr))
970 || (err = device_create_file(dev,
971 &sensor_dev_attr_in1_max.dev_attr))
972 || (err = device_create_file(dev,
973 &sensor_dev_attr_in1_alarm.dev_attr))
974 || (err = device_create_file(dev,
975 &sensor_dev_attr_in1_beep.dev_attr)))
976 return err;
977 }
978 if (kind != as99127f && kind != w83781d && kind != w83783s) {
979 if ((err = device_create_file(dev,
980 &sensor_dev_attr_in7_input.dev_attr))
981 || (err = device_create_file(dev,
982 &sensor_dev_attr_in7_min.dev_attr))
983 || (err = device_create_file(dev,
984 &sensor_dev_attr_in7_max.dev_attr))
985 || (err = device_create_file(dev,
986 &sensor_dev_attr_in7_alarm.dev_attr))
987 || (err = device_create_file(dev,
988 &sensor_dev_attr_in7_beep.dev_attr))
989 || (err = device_create_file(dev,
990 &sensor_dev_attr_in8_input.dev_attr))
991 || (err = device_create_file(dev,
992 &sensor_dev_attr_in8_min.dev_attr))
993 || (err = device_create_file(dev,
994 &sensor_dev_attr_in8_max.dev_attr))
995 || (err = device_create_file(dev,
996 &sensor_dev_attr_in8_alarm.dev_attr))
997 || (err = device_create_file(dev,
998 &sensor_dev_attr_in8_beep.dev_attr)))
999 return err;
1000 }
1001 if (kind != w83783s) {
1002 if ((err = device_create_file(dev,
1003 &sensor_dev_attr_temp3_input.dev_attr))
1004 || (err = device_create_file(dev,
1005 &sensor_dev_attr_temp3_max.dev_attr))
1006 || (err = device_create_file(dev,
1007 &sensor_dev_attr_temp3_max_hyst.dev_attr))
1008 || (err = device_create_file(dev,
1009 &sensor_dev_attr_temp3_alarm.dev_attr))
1010 || (err = device_create_file(dev,
1011 &sensor_dev_attr_temp3_beep.dev_attr)))
1012 return err;
1013
1014 if (kind != w83781d) {
1015 err = sysfs_chmod_file(&dev->kobj,
1016 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1017 S_IRUGO | S_IWUSR);
1018 if (err)
1019 return err;
1020 }
1021 }
1022
1023 if (kind != w83781d && kind != as99127f) {
1024 if ((err = device_create_file(dev,
1025 &sensor_dev_attr_pwm1.dev_attr))
1026 || (err = device_create_file(dev,
1027 &sensor_dev_attr_pwm2.dev_attr))
1028 || (err = device_create_file(dev, &dev_attr_pwm2_enable)))
1029 return err;
1030 }
1031 if (kind == w83782d && !is_isa) {
1032 if ((err = device_create_file(dev,
1033 &sensor_dev_attr_pwm3.dev_attr))
1034 || (err = device_create_file(dev,
1035 &sensor_dev_attr_pwm4.dev_attr)))
1036 return err;
1037 }
1038
1039 if (kind != as99127f && kind != w83781d) {
1040 if ((err = device_create_file(dev,
1041 &sensor_dev_attr_temp1_type.dev_attr))
1042 || (err = device_create_file(dev,
1043 &sensor_dev_attr_temp2_type.dev_attr)))
1044 return err;
1045 if (kind != w83783s) {
1046 if ((err = device_create_file(dev,
1047 &sensor_dev_attr_temp3_type.dev_attr)))
1048 return err;
1049 }
1050 }
1051
1052 return 0;
1053 }
1054
1055 /* Return 0 if detection is successful, -ENODEV otherwise */
1056 static int
1057 w83781d_detect(struct i2c_client *client, struct i2c_board_info *info)
1058 {
1059 int val1, val2;
1060 struct w83781d_data *isa = w83781d_data_if_isa();
1061 struct i2c_adapter *adapter = client->adapter;
1062 int address = client->addr;
1063 const char *client_name;
1064 enum vendor { winbond, asus } vendid;
1065
1066 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1067 return -ENODEV;
1068
1069 /* We block updates of the ISA device to minimize the risk of
1070 concurrent access to the same W83781D chip through different
1071 interfaces. */
1072 if (isa)
1073 mutex_lock(&isa->update_lock);
1074
1075 if (i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG) & 0x80) {
1076 dev_dbg(&adapter->dev,
1077 "Detection of w83781d chip failed at step 3\n");
1078 goto err_nodev;
1079 }
1080
1081 val1 = i2c_smbus_read_byte_data(client, W83781D_REG_BANK);
1082 val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
1083 /* Check for Winbond or Asus ID if in bank 0 */
1084 if (!(val1 & 0x07) &&
1085 ((!(val1 & 0x80) && val2 != 0xa3 && val2 != 0xc3) ||
1086 ( (val1 & 0x80) && val2 != 0x5c && val2 != 0x12))) {
1087 dev_dbg(&adapter->dev,
1088 "Detection of w83781d chip failed at step 4\n");
1089 goto err_nodev;
1090 }
1091 /* If Winbond SMBus, check address at 0x48.
1092 Asus doesn't support, except for as99127f rev.2 */
1093 if ((!(val1 & 0x80) && val2 == 0xa3) ||
1094 ( (val1 & 0x80) && val2 == 0x5c)) {
1095 if (i2c_smbus_read_byte_data(client, W83781D_REG_I2C_ADDR)
1096 != address) {
1097 dev_dbg(&adapter->dev,
1098 "Detection of w83781d chip failed at step 5\n");
1099 goto err_nodev;
1100 }
1101 }
1102
1103 /* Put it now into bank 0 and Vendor ID High Byte */
1104 i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1105 (i2c_smbus_read_byte_data(client, W83781D_REG_BANK)
1106 & 0x78) | 0x80);
1107
1108 /* Get the vendor ID */
1109 val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
1110 if (val2 == 0x5c)
1111 vendid = winbond;
1112 else if (val2 == 0x12)
1113 vendid = asus;
1114 else {
1115 dev_dbg(&adapter->dev,
1116 "w83781d chip vendor is neither Winbond nor Asus\n");
1117 goto err_nodev;
1118 }
1119
1120 /* Determine the chip type. */
1121 val1 = i2c_smbus_read_byte_data(client, W83781D_REG_WCHIPID);
1122 if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond)
1123 client_name = "w83781d";
1124 else if (val1 == 0x30 && vendid == winbond)
1125 client_name = "w83782d";
1126 else if (val1 == 0x40 && vendid == winbond && address == 0x2d)
1127 client_name = "w83783s";
1128 else if (val1 == 0x31)
1129 client_name = "as99127f";
1130 else
1131 goto err_nodev;
1132
1133 if (val1 <= 0x30 && w83781d_alias_detect(client, val1)) {
1134 dev_dbg(&adapter->dev, "Device at 0x%02x appears to "
1135 "be the same as ISA device\n", address);
1136 goto err_nodev;
1137 }
1138
1139 if (isa)
1140 mutex_unlock(&isa->update_lock);
1141
1142 strlcpy(info->type, client_name, I2C_NAME_SIZE);
1143
1144 return 0;
1145
1146 err_nodev:
1147 if (isa)
1148 mutex_unlock(&isa->update_lock);
1149 return -ENODEV;
1150 }
1151
1152 static int
1153 w83781d_probe(struct i2c_client *client, const struct i2c_device_id *id)
1154 {
1155 struct device *dev = &client->dev;
1156 struct w83781d_data *data;
1157 int err;
1158
1159 data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL);
1160 if (!data) {
1161 err = -ENOMEM;
1162 goto ERROR1;
1163 }
1164
1165 i2c_set_clientdata(client, data);
1166 mutex_init(&data->lock);
1167 mutex_init(&data->update_lock);
1168
1169 data->type = id->driver_data;
1170 data->client = client;
1171
1172 /* attach secondary i2c lm75-like clients */
1173 err = w83781d_detect_subclients(client);
1174 if (err)
1175 goto ERROR3;
1176
1177 /* Initialize the chip */
1178 w83781d_init_device(dev);
1179
1180 /* Register sysfs hooks */
1181 err = w83781d_create_files(dev, data->type, 0);
1182 if (err)
1183 goto ERROR4;
1184
1185 data->hwmon_dev = hwmon_device_register(dev);
1186 if (IS_ERR(data->hwmon_dev)) {
1187 err = PTR_ERR(data->hwmon_dev);
1188 goto ERROR4;
1189 }
1190
1191 return 0;
1192
1193 ERROR4:
1194 sysfs_remove_group(&dev->kobj, &w83781d_group);
1195 sysfs_remove_group(&dev->kobj, &w83781d_group_opt);
1196
1197 if (data->lm75[0])
1198 i2c_unregister_device(data->lm75[0]);
1199 if (data->lm75[1])
1200 i2c_unregister_device(data->lm75[1]);
1201 ERROR3:
1202 kfree(data);
1203 ERROR1:
1204 return err;
1205 }
1206
1207 static int
1208 w83781d_remove(struct i2c_client *client)
1209 {
1210 struct w83781d_data *data = i2c_get_clientdata(client);
1211 struct device *dev = &client->dev;
1212
1213 hwmon_device_unregister(data->hwmon_dev);
1214
1215 sysfs_remove_group(&dev->kobj, &w83781d_group);
1216 sysfs_remove_group(&dev->kobj, &w83781d_group_opt);
1217
1218 if (data->lm75[0])
1219 i2c_unregister_device(data->lm75[0]);
1220 if (data->lm75[1])
1221 i2c_unregister_device(data->lm75[1]);
1222
1223 kfree(data);
1224
1225 return 0;
1226 }
1227
1228 static int
1229 w83781d_read_value_i2c(struct w83781d_data *data, u16 reg)
1230 {
1231 struct i2c_client *client = data->client;
1232 int res, bank;
1233 struct i2c_client *cl;
1234
1235 bank = (reg >> 8) & 0x0f;
1236 if (bank > 2)
1237 /* switch banks */
1238 i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1239 bank);
1240 if (bank == 0 || bank > 2) {
1241 res = i2c_smbus_read_byte_data(client, reg & 0xff);
1242 } else {
1243 /* switch to subclient */
1244 cl = data->lm75[bank - 1];
1245 /* convert from ISA to LM75 I2C addresses */
1246 switch (reg & 0xff) {
1247 case 0x50: /* TEMP */
1248 res = swab16(i2c_smbus_read_word_data(cl, 0));
1249 break;
1250 case 0x52: /* CONFIG */
1251 res = i2c_smbus_read_byte_data(cl, 1);
1252 break;
1253 case 0x53: /* HYST */
1254 res = swab16(i2c_smbus_read_word_data(cl, 2));
1255 break;
1256 case 0x55: /* OVER */
1257 default:
1258 res = swab16(i2c_smbus_read_word_data(cl, 3));
1259 break;
1260 }
1261 }
1262 if (bank > 2)
1263 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1264
1265 return res;
1266 }
1267
1268 static int
1269 w83781d_write_value_i2c(struct w83781d_data *data, u16 reg, u16 value)
1270 {
1271 struct i2c_client *client = data->client;
1272 int bank;
1273 struct i2c_client *cl;
1274
1275 bank = (reg >> 8) & 0x0f;
1276 if (bank > 2)
1277 /* switch banks */
1278 i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1279 bank);
1280 if (bank == 0 || bank > 2) {
1281 i2c_smbus_write_byte_data(client, reg & 0xff,
1282 value & 0xff);
1283 } else {
1284 /* switch to subclient */
1285 cl = data->lm75[bank - 1];
1286 /* convert from ISA to LM75 I2C addresses */
1287 switch (reg & 0xff) {
1288 case 0x52: /* CONFIG */
1289 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
1290 break;
1291 case 0x53: /* HYST */
1292 i2c_smbus_write_word_data(cl, 2, swab16(value));
1293 break;
1294 case 0x55: /* OVER */
1295 i2c_smbus_write_word_data(cl, 3, swab16(value));
1296 break;
1297 }
1298 }
1299 if (bank > 2)
1300 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1301
1302 return 0;
1303 }
1304
1305 static void
1306 w83781d_init_device(struct device *dev)
1307 {
1308 struct w83781d_data *data = dev_get_drvdata(dev);
1309 int i, p;
1310 int type = data->type;
1311 u8 tmp;
1312
1313 if (reset && type != as99127f) { /* this resets registers we don't have
1314 documentation for on the as99127f */
1315 /* Resetting the chip has been the default for a long time,
1316 but it causes the BIOS initializations (fan clock dividers,
1317 thermal sensor types...) to be lost, so it is now optional.
1318 It might even go away if nobody reports it as being useful,
1319 as I see very little reason why this would be needed at
1320 all. */
1321 dev_info(dev, "If reset=1 solved a problem you were "
1322 "having, please report!\n");
1323
1324 /* save these registers */
1325 i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
1326 p = w83781d_read_value(data, W83781D_REG_PWMCLK12);
1327 /* Reset all except Watchdog values and last conversion values
1328 This sets fan-divs to 2, among others */
1329 w83781d_write_value(data, W83781D_REG_CONFIG, 0x80);
1330 /* Restore the registers and disable power-on abnormal beep.
1331 This saves FAN 1/2/3 input/output values set by BIOS. */
1332 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80);
1333 w83781d_write_value(data, W83781D_REG_PWMCLK12, p);
1334 /* Disable master beep-enable (reset turns it on).
1335 Individual beep_mask should be reset to off but for some reason
1336 disabling this bit helps some people not get beeped */
1337 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, 0);
1338 }
1339
1340 /* Disable power-on abnormal beep, as advised by the datasheet.
1341 Already done if reset=1. */
1342 if (init && !reset && type != as99127f) {
1343 i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
1344 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80);
1345 }
1346
1347 data->vrm = vid_which_vrm();
1348
1349 if ((type != w83781d) && (type != as99127f)) {
1350 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
1351 for (i = 1; i <= 3; i++) {
1352 if (!(tmp & BIT_SCFG1[i - 1])) {
1353 data->sens[i - 1] = 4;
1354 } else {
1355 if (w83781d_read_value
1356 (data,
1357 W83781D_REG_SCFG2) & BIT_SCFG2[i - 1])
1358 data->sens[i - 1] = 1;
1359 else
1360 data->sens[i - 1] = 2;
1361 }
1362 if (type == w83783s && i == 2)
1363 break;
1364 }
1365 }
1366
1367 if (init && type != as99127f) {
1368 /* Enable temp2 */
1369 tmp = w83781d_read_value(data, W83781D_REG_TEMP2_CONFIG);
1370 if (tmp & 0x01) {
1371 dev_warn(dev, "Enabling temp2, readings "
1372 "might not make sense\n");
1373 w83781d_write_value(data, W83781D_REG_TEMP2_CONFIG,
1374 tmp & 0xfe);
1375 }
1376
1377 /* Enable temp3 */
1378 if (type != w83783s) {
1379 tmp = w83781d_read_value(data,
1380 W83781D_REG_TEMP3_CONFIG);
1381 if (tmp & 0x01) {
1382 dev_warn(dev, "Enabling temp3, "
1383 "readings might not make sense\n");
1384 w83781d_write_value(data,
1385 W83781D_REG_TEMP3_CONFIG, tmp & 0xfe);
1386 }
1387 }
1388 }
1389
1390 /* Start monitoring */
1391 w83781d_write_value(data, W83781D_REG_CONFIG,
1392 (w83781d_read_value(data,
1393 W83781D_REG_CONFIG) & 0xf7)
1394 | 0x01);
1395
1396 /* A few vars need to be filled upon startup */
1397 for (i = 0; i < 3; i++) {
1398 data->fan_min[i] = w83781d_read_value(data,
1399 W83781D_REG_FAN_MIN(i));
1400 }
1401
1402 mutex_init(&data->update_lock);
1403 }
1404
1405 static struct w83781d_data *w83781d_update_device(struct device *dev)
1406 {
1407 struct w83781d_data *data = dev_get_drvdata(dev);
1408 struct i2c_client *client = data->client;
1409 int i;
1410
1411 mutex_lock(&data->update_lock);
1412
1413 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1414 || !data->valid) {
1415 dev_dbg(dev, "Starting device update\n");
1416
1417 for (i = 0; i <= 8; i++) {
1418 if (data->type == w83783s && i == 1)
1419 continue; /* 783S has no in1 */
1420 data->in[i] =
1421 w83781d_read_value(data, W83781D_REG_IN(i));
1422 data->in_min[i] =
1423 w83781d_read_value(data, W83781D_REG_IN_MIN(i));
1424 data->in_max[i] =
1425 w83781d_read_value(data, W83781D_REG_IN_MAX(i));
1426 if ((data->type != w83782d) && (i == 6))
1427 break;
1428 }
1429 for (i = 0; i < 3; i++) {
1430 data->fan[i] =
1431 w83781d_read_value(data, W83781D_REG_FAN(i));
1432 data->fan_min[i] =
1433 w83781d_read_value(data, W83781D_REG_FAN_MIN(i));
1434 }
1435 if (data->type != w83781d && data->type != as99127f) {
1436 for (i = 0; i < 4; i++) {
1437 data->pwm[i] =
1438 w83781d_read_value(data,
1439 W83781D_REG_PWM[i]);
1440 /* Only W83782D on SMBus has PWM3 and PWM4 */
1441 if ((data->type != w83782d || !client)
1442 && i == 1)
1443 break;
1444 }
1445 /* Only PWM2 can be disabled */
1446 data->pwm2_enable = (w83781d_read_value(data,
1447 W83781D_REG_PWMCLK12) & 0x08) >> 3;
1448 }
1449
1450 data->temp = w83781d_read_value(data, W83781D_REG_TEMP(1));
1451 data->temp_max =
1452 w83781d_read_value(data, W83781D_REG_TEMP_OVER(1));
1453 data->temp_max_hyst =
1454 w83781d_read_value(data, W83781D_REG_TEMP_HYST(1));
1455 data->temp_add[0] =
1456 w83781d_read_value(data, W83781D_REG_TEMP(2));
1457 data->temp_max_add[0] =
1458 w83781d_read_value(data, W83781D_REG_TEMP_OVER(2));
1459 data->temp_max_hyst_add[0] =
1460 w83781d_read_value(data, W83781D_REG_TEMP_HYST(2));
1461 if (data->type != w83783s) {
1462 data->temp_add[1] =
1463 w83781d_read_value(data, W83781D_REG_TEMP(3));
1464 data->temp_max_add[1] =
1465 w83781d_read_value(data,
1466 W83781D_REG_TEMP_OVER(3));
1467 data->temp_max_hyst_add[1] =
1468 w83781d_read_value(data,
1469 W83781D_REG_TEMP_HYST(3));
1470 }
1471 i = w83781d_read_value(data, W83781D_REG_VID_FANDIV);
1472 data->vid = i & 0x0f;
1473 data->vid |= (w83781d_read_value(data,
1474 W83781D_REG_CHIPID) & 0x01) << 4;
1475 data->fan_div[0] = (i >> 4) & 0x03;
1476 data->fan_div[1] = (i >> 6) & 0x03;
1477 data->fan_div[2] = (w83781d_read_value(data,
1478 W83781D_REG_PIN) >> 6) & 0x03;
1479 if ((data->type != w83781d) && (data->type != as99127f)) {
1480 i = w83781d_read_value(data, W83781D_REG_VBAT);
1481 data->fan_div[0] |= (i >> 3) & 0x04;
1482 data->fan_div[1] |= (i >> 4) & 0x04;
1483 data->fan_div[2] |= (i >> 5) & 0x04;
1484 }
1485 if (data->type == w83782d) {
1486 data->alarms = w83781d_read_value(data,
1487 W83782D_REG_ALARM1)
1488 | (w83781d_read_value(data,
1489 W83782D_REG_ALARM2) << 8)
1490 | (w83781d_read_value(data,
1491 W83782D_REG_ALARM3) << 16);
1492 } else if (data->type == w83783s) {
1493 data->alarms = w83781d_read_value(data,
1494 W83782D_REG_ALARM1)
1495 | (w83781d_read_value(data,
1496 W83782D_REG_ALARM2) << 8);
1497 } else {
1498 /* No real-time status registers, fall back to
1499 interrupt status registers */
1500 data->alarms = w83781d_read_value(data,
1501 W83781D_REG_ALARM1)
1502 | (w83781d_read_value(data,
1503 W83781D_REG_ALARM2) << 8);
1504 }
1505 i = w83781d_read_value(data, W83781D_REG_BEEP_INTS2);
1506 data->beep_mask = (i << 8) +
1507 w83781d_read_value(data, W83781D_REG_BEEP_INTS1);
1508 if ((data->type != w83781d) && (data->type != as99127f)) {
1509 data->beep_mask |=
1510 w83781d_read_value(data,
1511 W83781D_REG_BEEP_INTS3) << 16;
1512 }
1513 data->last_updated = jiffies;
1514 data->valid = 1;
1515 }
1516
1517 mutex_unlock(&data->update_lock);
1518
1519 return data;
1520 }
1521
1522 static const struct i2c_device_id w83781d_ids[] = {
1523 { "w83781d", w83781d, },
1524 { "w83782d", w83782d, },
1525 { "w83783s", w83783s, },
1526 { "as99127f", as99127f },
1527 { /* LIST END */ }
1528 };
1529 MODULE_DEVICE_TABLE(i2c, w83781d_ids);
1530
1531 static struct i2c_driver w83781d_driver = {
1532 .class = I2C_CLASS_HWMON,
1533 .driver = {
1534 .name = "w83781d",
1535 },
1536 .probe = w83781d_probe,
1537 .remove = w83781d_remove,
1538 .id_table = w83781d_ids,
1539 .detect = w83781d_detect,
1540 .address_list = normal_i2c,
1541 };
1542
1543 /*
1544 * ISA related code
1545 */
1546 #ifdef CONFIG_ISA
1547
1548 /* ISA device, if found */
1549 static struct platform_device *pdev;
1550
1551 static unsigned short isa_address = 0x290;
1552
1553 /* I2C devices get this name attribute automatically, but for ISA devices
1554 we must create it by ourselves. */
1555 static ssize_t
1556 show_name(struct device *dev, struct device_attribute *devattr, char *buf)
1557 {
1558 struct w83781d_data *data = dev_get_drvdata(dev);
1559 return sprintf(buf, "%s\n", data->name);
1560 }
1561 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1562
1563 static struct w83781d_data *w83781d_data_if_isa(void)
1564 {
1565 return pdev ? platform_get_drvdata(pdev) : NULL;
1566 }
1567
1568 /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */
1569 static int w83781d_alias_detect(struct i2c_client *client, u8 chipid)
1570 {
1571 struct w83781d_data *isa;
1572 int i;
1573
1574 if (!pdev) /* No ISA chip */
1575 return 0;
1576
1577 isa = platform_get_drvdata(pdev);
1578
1579 if (w83781d_read_value(isa, W83781D_REG_I2C_ADDR) != client->addr)
1580 return 0; /* Address doesn't match */
1581 if (w83781d_read_value(isa, W83781D_REG_WCHIPID) != chipid)
1582 return 0; /* Chip type doesn't match */
1583
1584 /* We compare all the limit registers, the config register and the
1585 * interrupt mask registers */
1586 for (i = 0x2b; i <= 0x3d; i++) {
1587 if (w83781d_read_value(isa, i) !=
1588 i2c_smbus_read_byte_data(client, i))
1589 return 0;
1590 }
1591 if (w83781d_read_value(isa, W83781D_REG_CONFIG) !=
1592 i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG))
1593 return 0;
1594 for (i = 0x43; i <= 0x46; i++) {
1595 if (w83781d_read_value(isa, i) !=
1596 i2c_smbus_read_byte_data(client, i))
1597 return 0;
1598 }
1599
1600 return 1;
1601 }
1602
1603 static int
1604 w83781d_read_value_isa(struct w83781d_data *data, u16 reg)
1605 {
1606 int word_sized, res;
1607
1608 word_sized = (((reg & 0xff00) == 0x100)
1609 || ((reg & 0xff00) == 0x200))
1610 && (((reg & 0x00ff) == 0x50)
1611 || ((reg & 0x00ff) == 0x53)
1612 || ((reg & 0x00ff) == 0x55));
1613 if (reg & 0xff00) {
1614 outb_p(W83781D_REG_BANK,
1615 data->isa_addr + W83781D_ADDR_REG_OFFSET);
1616 outb_p(reg >> 8,
1617 data->isa_addr + W83781D_DATA_REG_OFFSET);
1618 }
1619 outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET);
1620 res = inb_p(data->isa_addr + W83781D_DATA_REG_OFFSET);
1621 if (word_sized) {
1622 outb_p((reg & 0xff) + 1,
1623 data->isa_addr + W83781D_ADDR_REG_OFFSET);
1624 res =
1625 (res << 8) + inb_p(data->isa_addr +
1626 W83781D_DATA_REG_OFFSET);
1627 }
1628 if (reg & 0xff00) {
1629 outb_p(W83781D_REG_BANK,
1630 data->isa_addr + W83781D_ADDR_REG_OFFSET);
1631 outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET);
1632 }
1633 return res;
1634 }
1635
1636 static void
1637 w83781d_write_value_isa(struct w83781d_data *data, u16 reg, u16 value)
1638 {
1639 int word_sized;
1640
1641 word_sized = (((reg & 0xff00) == 0x100)
1642 || ((reg & 0xff00) == 0x200))
1643 && (((reg & 0x00ff) == 0x53)
1644 || ((reg & 0x00ff) == 0x55));
1645 if (reg & 0xff00) {
1646 outb_p(W83781D_REG_BANK,
1647 data->isa_addr + W83781D_ADDR_REG_OFFSET);
1648 outb_p(reg >> 8,
1649 data->isa_addr + W83781D_DATA_REG_OFFSET);
1650 }
1651 outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET);
1652 if (word_sized) {
1653 outb_p(value >> 8,
1654 data->isa_addr + W83781D_DATA_REG_OFFSET);
1655 outb_p((reg & 0xff) + 1,
1656 data->isa_addr + W83781D_ADDR_REG_OFFSET);
1657 }
1658 outb_p(value & 0xff, data->isa_addr + W83781D_DATA_REG_OFFSET);
1659 if (reg & 0xff00) {
1660 outb_p(W83781D_REG_BANK,
1661 data->isa_addr + W83781D_ADDR_REG_OFFSET);
1662 outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET);
1663 }
1664 }
1665
1666 /* The SMBus locks itself, usually, but nothing may access the Winbond between
1667 bank switches. ISA access must always be locked explicitly!
1668 We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks,
1669 would slow down the W83781D access and should not be necessary.
1670 There are some ugly typecasts here, but the good news is - they should
1671 nowhere else be necessary! */
1672 static int
1673 w83781d_read_value(struct w83781d_data *data, u16 reg)
1674 {
1675 struct i2c_client *client = data->client;
1676 int res;
1677
1678 mutex_lock(&data->lock);
1679 if (client)
1680 res = w83781d_read_value_i2c(data, reg);
1681 else
1682 res = w83781d_read_value_isa(data, reg);
1683 mutex_unlock(&data->lock);
1684 return res;
1685 }
1686
1687 static int
1688 w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
1689 {
1690 struct i2c_client *client = data->client;
1691
1692 mutex_lock(&data->lock);
1693 if (client)
1694 w83781d_write_value_i2c(data, reg, value);
1695 else
1696 w83781d_write_value_isa(data, reg, value);
1697 mutex_unlock(&data->lock);
1698 return 0;
1699 }
1700
1701 static int __devinit
1702 w83781d_isa_probe(struct platform_device *pdev)
1703 {
1704 int err, reg;
1705 struct w83781d_data *data;
1706 struct resource *res;
1707
1708 /* Reserve the ISA region */
1709 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1710 if (!request_region(res->start + W83781D_ADDR_REG_OFFSET, 2,
1711 "w83781d")) {
1712 err = -EBUSY;
1713 goto exit;
1714 }
1715
1716 data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL);
1717 if (!data) {
1718 err = -ENOMEM;
1719 goto exit_release_region;
1720 }
1721 mutex_init(&data->lock);
1722 data->isa_addr = res->start;
1723 platform_set_drvdata(pdev, data);
1724
1725 reg = w83781d_read_value(data, W83781D_REG_WCHIPID);
1726 switch (reg) {
1727 case 0x30:
1728 data->type = w83782d;
1729 data->name = "w83782d";
1730 break;
1731 default:
1732 data->type = w83781d;
1733 data->name = "w83781d";
1734 }
1735
1736 /* Initialize the W83781D chip */
1737 w83781d_init_device(&pdev->dev);
1738
1739 /* Register sysfs hooks */
1740 err = w83781d_create_files(&pdev->dev, data->type, 1);
1741 if (err)
1742 goto exit_remove_files;
1743
1744 err = device_create_file(&pdev->dev, &dev_attr_name);
1745 if (err)
1746 goto exit_remove_files;
1747
1748 data->hwmon_dev = hwmon_device_register(&pdev->dev);
1749 if (IS_ERR(data->hwmon_dev)) {
1750 err = PTR_ERR(data->hwmon_dev);
1751 goto exit_remove_files;
1752 }
1753
1754 return 0;
1755
1756 exit_remove_files:
1757 sysfs_remove_group(&pdev->dev.kobj, &w83781d_group);
1758 sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt);
1759 device_remove_file(&pdev->dev, &dev_attr_name);
1760 kfree(data);
1761 exit_release_region:
1762 release_region(res->start + W83781D_ADDR_REG_OFFSET, 2);
1763 exit:
1764 return err;
1765 }
1766
1767 static int __devexit
1768 w83781d_isa_remove(struct platform_device *pdev)
1769 {
1770 struct w83781d_data *data = platform_get_drvdata(pdev);
1771
1772 hwmon_device_unregister(data->hwmon_dev);
1773 sysfs_remove_group(&pdev->dev.kobj, &w83781d_group);
1774 sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt);
1775 device_remove_file(&pdev->dev, &dev_attr_name);
1776 release_region(data->isa_addr + W83781D_ADDR_REG_OFFSET, 2);
1777 kfree(data);
1778
1779 return 0;
1780 }
1781
1782 static struct platform_driver w83781d_isa_driver = {
1783 .driver = {
1784 .owner = THIS_MODULE,
1785 .name = "w83781d",
1786 },
1787 .probe = w83781d_isa_probe,
1788 .remove = __devexit_p(w83781d_isa_remove),
1789 };
1790
1791 /* return 1 if a supported chip is found, 0 otherwise */
1792 static int __init
1793 w83781d_isa_found(unsigned short address)
1794 {
1795 int val, save, found = 0;
1796 int port;
1797
1798 /* Some boards declare base+0 to base+7 as a PNP device, some base+4
1799 * to base+7 and some base+5 to base+6. So we better request each port
1800 * individually for the probing phase. */
1801 for (port = address; port < address + W83781D_EXTENT; port++) {
1802 if (!request_region(port, 1, "w83781d")) {
1803 pr_debug("Failed to request port 0x%x\n", port);
1804 goto release;
1805 }
1806 }
1807
1808 #define REALLY_SLOW_IO
1809 /* We need the timeouts for at least some W83781D-like
1810 chips. But only if we read 'undefined' registers. */
1811 val = inb_p(address + 1);
1812 if (inb_p(address + 2) != val
1813 || inb_p(address + 3) != val
1814 || inb_p(address + 7) != val) {
1815 pr_debug("Detection failed at step %d\n", 1);
1816 goto release;
1817 }
1818 #undef REALLY_SLOW_IO
1819
1820 /* We should be able to change the 7 LSB of the address port. The
1821 MSB (busy flag) should be clear initially, set after the write. */
1822 save = inb_p(address + W83781D_ADDR_REG_OFFSET);
1823 if (save & 0x80) {
1824 pr_debug("Detection failed at step %d\n", 2);
1825 goto release;
1826 }
1827 val = ~save & 0x7f;
1828 outb_p(val, address + W83781D_ADDR_REG_OFFSET);
1829 if (inb_p(address + W83781D_ADDR_REG_OFFSET) != (val | 0x80)) {
1830 outb_p(save, address + W83781D_ADDR_REG_OFFSET);
1831 pr_debug("Detection failed at step %d\n", 3);
1832 goto release;
1833 }
1834
1835 /* We found a device, now see if it could be a W83781D */
1836 outb_p(W83781D_REG_CONFIG, address + W83781D_ADDR_REG_OFFSET);
1837 val = inb_p(address + W83781D_DATA_REG_OFFSET);
1838 if (val & 0x80) {
1839 pr_debug("Detection failed at step %d\n", 4);
1840 goto release;
1841 }
1842 outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET);
1843 save = inb_p(address + W83781D_DATA_REG_OFFSET);
1844 outb_p(W83781D_REG_CHIPMAN, address + W83781D_ADDR_REG_OFFSET);
1845 val = inb_p(address + W83781D_DATA_REG_OFFSET);
1846 if ((!(save & 0x80) && (val != 0xa3))
1847 || ((save & 0x80) && (val != 0x5c))) {
1848 pr_debug("Detection failed at step %d\n", 5);
1849 goto release;
1850 }
1851 outb_p(W83781D_REG_I2C_ADDR, address + W83781D_ADDR_REG_OFFSET);
1852 val = inb_p(address + W83781D_DATA_REG_OFFSET);
1853 if (val < 0x03 || val > 0x77) { /* Not a valid I2C address */
1854 pr_debug("Detection failed at step %d\n", 6);
1855 goto release;
1856 }
1857
1858 /* The busy flag should be clear again */
1859 if (inb_p(address + W83781D_ADDR_REG_OFFSET) & 0x80) {
1860 pr_debug("Detection failed at step %d\n", 7);
1861 goto release;
1862 }
1863
1864 /* Determine the chip type */
1865 outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET);
1866 save = inb_p(address + W83781D_DATA_REG_OFFSET);
1867 outb_p(save & 0xf8, address + W83781D_DATA_REG_OFFSET);
1868 outb_p(W83781D_REG_WCHIPID, address + W83781D_ADDR_REG_OFFSET);
1869 val = inb_p(address + W83781D_DATA_REG_OFFSET);
1870 if ((val & 0xfe) == 0x10 /* W83781D */
1871 || val == 0x30) /* W83782D */
1872 found = 1;
1873
1874 if (found)
1875 pr_info("Found a %s chip at %#x\n",
1876 val == 0x30 ? "W83782D" : "W83781D", (int)address);
1877
1878 release:
1879 for (port--; port >= address; port--)
1880 release_region(port, 1);
1881 return found;
1882 }
1883
1884 static int __init
1885 w83781d_isa_device_add(unsigned short address)
1886 {
1887 struct resource res = {
1888 .start = address,
1889 .end = address + W83781D_EXTENT - 1,
1890 .name = "w83781d",
1891 .flags = IORESOURCE_IO,
1892 };
1893 int err;
1894
1895 pdev = platform_device_alloc("w83781d", address);
1896 if (!pdev) {
1897 err = -ENOMEM;
1898 pr_err("Device allocation failed\n");
1899 goto exit;
1900 }
1901
1902 err = platform_device_add_resources(pdev, &res, 1);
1903 if (err) {
1904 pr_err("Device resource addition failed (%d)\n", err);
1905 goto exit_device_put;
1906 }
1907
1908 err = platform_device_add(pdev);
1909 if (err) {
1910 pr_err("Device addition failed (%d)\n", err);
1911 goto exit_device_put;
1912 }
1913
1914 return 0;
1915
1916 exit_device_put:
1917 platform_device_put(pdev);
1918 exit:
1919 pdev = NULL;
1920 return err;
1921 }
1922
1923 static int __init
1924 w83781d_isa_register(void)
1925 {
1926 int res;
1927
1928 if (w83781d_isa_found(isa_address)) {
1929 res = platform_driver_register(&w83781d_isa_driver);
1930 if (res)
1931 goto exit;
1932
1933 /* Sets global pdev as a side effect */
1934 res = w83781d_isa_device_add(isa_address);
1935 if (res)
1936 goto exit_unreg_isa_driver;
1937 }
1938
1939 return 0;
1940
1941 exit_unreg_isa_driver:
1942 platform_driver_unregister(&w83781d_isa_driver);
1943 exit:
1944 return res;
1945 }
1946
1947 static void
1948 w83781d_isa_unregister(void)
1949 {
1950 if (pdev) {
1951 platform_device_unregister(pdev);
1952 platform_driver_unregister(&w83781d_isa_driver);
1953 }
1954 }
1955 #else /* !CONFIG_ISA */
1956
1957 static struct w83781d_data *w83781d_data_if_isa(void)
1958 {
1959 return NULL;
1960 }
1961
1962 static int
1963 w83781d_alias_detect(struct i2c_client *client, u8 chipid)
1964 {
1965 return 0;
1966 }
1967
1968 static int
1969 w83781d_read_value(struct w83781d_data *data, u16 reg)
1970 {
1971 int res;
1972
1973 mutex_lock(&data->lock);
1974 res = w83781d_read_value_i2c(data, reg);
1975 mutex_unlock(&data->lock);
1976
1977 return res;
1978 }
1979
1980 static int
1981 w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
1982 {
1983 mutex_lock(&data->lock);
1984 w83781d_write_value_i2c(data, reg, value);
1985 mutex_unlock(&data->lock);
1986
1987 return 0;
1988 }
1989
1990 static int __init
1991 w83781d_isa_register(void)
1992 {
1993 return 0;
1994 }
1995
1996 static void
1997 w83781d_isa_unregister(void)
1998 {
1999 }
2000 #endif /* CONFIG_ISA */
2001
2002 static int __init
2003 sensors_w83781d_init(void)
2004 {
2005 int res;
2006
2007 /* We register the ISA device first, so that we can skip the
2008 * registration of an I2C interface to the same device. */
2009 res = w83781d_isa_register();
2010 if (res)
2011 goto exit;
2012
2013 res = i2c_add_driver(&w83781d_driver);
2014 if (res)
2015 goto exit_unreg_isa;
2016
2017 return 0;
2018
2019 exit_unreg_isa:
2020 w83781d_isa_unregister();
2021 exit:
2022 return res;
2023 }
2024
2025 static void __exit
2026 sensors_w83781d_exit(void)
2027 {
2028 w83781d_isa_unregister();
2029 i2c_del_driver(&w83781d_driver);
2030 }
2031
2032 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
2033 "Philip Edelbrock <phil@netroedge.com>, "
2034 "and Mark Studebaker <mdsxyz123@yahoo.com>");
2035 MODULE_DESCRIPTION("W83781D driver");
2036 MODULE_LICENSE("GPL");
2037
2038 module_init(sensors_w83781d_init);
2039 module_exit(sensors_w83781d_exit);
kernel-based virtual machine