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drivers: power: report battery voltage in AOSP compatible format
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / hwmon / w83781d.c
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,
68 "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}");
69
70 static bool reset;
71 module_param(reset, bool, 0);
72 MODULE_PARM_DESC(reset, "Set to one to reset chip on load");
73
74 static bool 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 /*
149 * The following are undocumented in the data sheets however we
150 * received the information in an email from Winbond tech support
151 */
152 /* Sensor selection - not on 781d */
153 #define W83781D_REG_SCFG1 0x5D
154 static const u8 BIT_SCFG1[] = { 0x02, 0x04, 0x08 };
155
156 #define W83781D_REG_SCFG2 0x59
157 static const u8 BIT_SCFG2[] = { 0x10, 0x20, 0x40 };
158
159 #define W83781D_DEFAULT_BETA 3435
160
161 /* Conversions */
162 #define IN_TO_REG(val) clamp_val(((val) + 8) / 16, 0, 255)
163 #define IN_FROM_REG(val) ((val) * 16)
164
165 static inline u8
166 FAN_TO_REG(long rpm, int div)
167 {
168 if (rpm == 0)
169 return 255;
170 rpm = clamp_val(rpm, 1, 1000000);
171 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
172 }
173
174 static inline long
175 FAN_FROM_REG(u8 val, int div)
176 {
177 if (val == 0)
178 return -1;
179 if (val == 255)
180 return 0;
181 return 1350000 / (val * div);
182 }
183
184 #define TEMP_TO_REG(val) clamp_val((val) / 1000, -127, 128)
185 #define TEMP_FROM_REG(val) ((val) * 1000)
186
187 #define BEEP_MASK_FROM_REG(val, type) ((type) == as99127f ? \
188 (~(val)) & 0x7fff : (val) & 0xff7fff)
189 #define BEEP_MASK_TO_REG(val, type) ((type) == as99127f ? \
190 (~(val)) & 0x7fff : (val) & 0xff7fff)
191
192 #define DIV_FROM_REG(val) (1 << (val))
193
194 static inline u8
195 DIV_TO_REG(long val, enum chips type)
196 {
197 int i;
198 val = clamp_val(val, 1,
199 ((type == w83781d || type == as99127f) ? 8 : 128)) >> 1;
200 for (i = 0; i < 7; i++) {
201 if (val == 0)
202 break;
203 val >>= 1;
204 }
205 return i;
206 }
207
208 struct w83781d_data {
209 struct i2c_client *client;
210 struct device *hwmon_dev;
211 struct mutex lock;
212 enum chips type;
213
214 /* For ISA device only */
215 const char *name;
216 int isa_addr;
217
218 struct mutex update_lock;
219 char valid; /* !=0 if following fields are valid */
220 unsigned long last_updated; /* In jiffies */
221
222 struct i2c_client *lm75[2]; /* for secondary I2C addresses */
223 /* array of 2 pointers to subclients */
224
225 u8 in[9]; /* Register value - 8 & 9 for 782D only */
226 u8 in_max[9]; /* Register value - 8 & 9 for 782D only */
227 u8 in_min[9]; /* Register value - 8 & 9 for 782D only */
228 u8 fan[3]; /* Register value */
229 u8 fan_min[3]; /* Register value */
230 s8 temp; /* Register value */
231 s8 temp_max; /* Register value */
232 s8 temp_max_hyst; /* Register value */
233 u16 temp_add[2]; /* Register value */
234 u16 temp_max_add[2]; /* Register value */
235 u16 temp_max_hyst_add[2]; /* Register value */
236 u8 fan_div[3]; /* Register encoding, shifted right */
237 u8 vid; /* Register encoding, combined */
238 u32 alarms; /* Register encoding, combined */
239 u32 beep_mask; /* Register encoding, combined */
240 u8 pwm[4]; /* Register value */
241 u8 pwm2_enable; /* Boolean */
242 u16 sens[3]; /*
243 * 782D/783S only.
244 * 1 = pentium diode; 2 = 3904 diode;
245 * 4 = thermistor
246 */
247 u8 vrm;
248 };
249
250 static struct w83781d_data *w83781d_data_if_isa(void);
251 static int w83781d_alias_detect(struct i2c_client *client, u8 chipid);
252
253 static int w83781d_read_value(struct w83781d_data *data, u16 reg);
254 static int w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value);
255 static struct w83781d_data *w83781d_update_device(struct device *dev);
256 static void w83781d_init_device(struct device *dev);
257
258 /* following are the sysfs callback functions */
259 #define show_in_reg(reg) \
260 static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \
261 char *buf) \
262 { \
263 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
264 struct w83781d_data *data = w83781d_update_device(dev); \
265 return sprintf(buf, "%ld\n", \
266 (long)IN_FROM_REG(data->reg[attr->index])); \
267 }
268 show_in_reg(in);
269 show_in_reg(in_min);
270 show_in_reg(in_max);
271
272 #define store_in_reg(REG, reg) \
273 static ssize_t store_in_##reg(struct device *dev, struct device_attribute \
274 *da, const char *buf, size_t count) \
275 { \
276 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
277 struct w83781d_data *data = dev_get_drvdata(dev); \
278 int nr = attr->index; \
279 unsigned long val; \
280 int err = kstrtoul(buf, 10, &val); \
281 if (err) \
282 return err; \
283 mutex_lock(&data->update_lock); \
284 data->in_##reg[nr] = IN_TO_REG(val); \
285 w83781d_write_value(data, W83781D_REG_IN_##REG(nr), \
286 data->in_##reg[nr]); \
287 \
288 mutex_unlock(&data->update_lock); \
289 return count; \
290 }
291 store_in_reg(MIN, min);
292 store_in_reg(MAX, max);
293
294 #define sysfs_in_offsets(offset) \
295 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
296 show_in, NULL, offset); \
297 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
298 show_in_min, store_in_min, offset); \
299 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
300 show_in_max, store_in_max, offset)
301
302 sysfs_in_offsets(0);
303 sysfs_in_offsets(1);
304 sysfs_in_offsets(2);
305 sysfs_in_offsets(3);
306 sysfs_in_offsets(4);
307 sysfs_in_offsets(5);
308 sysfs_in_offsets(6);
309 sysfs_in_offsets(7);
310 sysfs_in_offsets(8);
311
312 #define show_fan_reg(reg) \
313 static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \
314 char *buf) \
315 { \
316 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
317 struct w83781d_data *data = w83781d_update_device(dev); \
318 return sprintf(buf, "%ld\n", \
319 FAN_FROM_REG(data->reg[attr->index], \
320 DIV_FROM_REG(data->fan_div[attr->index]))); \
321 }
322 show_fan_reg(fan);
323 show_fan_reg(fan_min);
324
325 static ssize_t
326 store_fan_min(struct device *dev, struct device_attribute *da,
327 const char *buf, size_t count)
328 {
329 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
330 struct w83781d_data *data = dev_get_drvdata(dev);
331 int nr = attr->index;
332 unsigned long val;
333 int err;
334
335 err = kstrtoul(buf, 10, &val);
336 if (err)
337 return err;
338
339 mutex_lock(&data->update_lock);
340 data->fan_min[nr] =
341 FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
342 w83781d_write_value(data, W83781D_REG_FAN_MIN(nr),
343 data->fan_min[nr]);
344
345 mutex_unlock(&data->update_lock);
346 return count;
347 }
348
349 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
350 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
351 show_fan_min, store_fan_min, 0);
352 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
353 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO | S_IWUSR,
354 show_fan_min, store_fan_min, 1);
355 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
356 static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO | S_IWUSR,
357 show_fan_min, store_fan_min, 2);
358
359 #define show_temp_reg(reg) \
360 static ssize_t show_##reg(struct device *dev, struct device_attribute *da, \
361 char *buf) \
362 { \
363 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
364 struct w83781d_data *data = w83781d_update_device(dev); \
365 int nr = attr->index; \
366 if (nr >= 2) { /* TEMP2 and TEMP3 */ \
367 return sprintf(buf, "%d\n", \
368 LM75_TEMP_FROM_REG(data->reg##_add[nr-2])); \
369 } else { /* TEMP1 */ \
370 return sprintf(buf, "%ld\n", (long)TEMP_FROM_REG(data->reg)); \
371 } \
372 }
373 show_temp_reg(temp);
374 show_temp_reg(temp_max);
375 show_temp_reg(temp_max_hyst);
376
377 #define store_temp_reg(REG, reg) \
378 static ssize_t store_temp_##reg(struct device *dev, \
379 struct device_attribute *da, const char *buf, size_t count) \
380 { \
381 struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
382 struct w83781d_data *data = dev_get_drvdata(dev); \
383 int nr = attr->index; \
384 long val; \
385 int err = kstrtol(buf, 10, &val); \
386 if (err) \
387 return err; \
388 mutex_lock(&data->update_lock); \
389 \
390 if (nr >= 2) { /* TEMP2 and TEMP3 */ \
391 data->temp_##reg##_add[nr-2] = LM75_TEMP_TO_REG(val); \
392 w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \
393 data->temp_##reg##_add[nr-2]); \
394 } else { /* TEMP1 */ \
395 data->temp_##reg = TEMP_TO_REG(val); \
396 w83781d_write_value(data, W83781D_REG_TEMP_##REG(nr), \
397 data->temp_##reg); \
398 } \
399 \
400 mutex_unlock(&data->update_lock); \
401 return count; \
402 }
403 store_temp_reg(OVER, max);
404 store_temp_reg(HYST, max_hyst);
405
406 #define sysfs_temp_offsets(offset) \
407 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
408 show_temp, NULL, offset); \
409 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
410 show_temp_max, store_temp_max, offset); \
411 static SENSOR_DEVICE_ATTR(temp##offset##_max_hyst, S_IRUGO | S_IWUSR, \
412 show_temp_max_hyst, store_temp_max_hyst, offset);
413
414 sysfs_temp_offsets(1);
415 sysfs_temp_offsets(2);
416 sysfs_temp_offsets(3);
417
418 static ssize_t
419 show_vid_reg(struct device *dev, struct device_attribute *attr, char *buf)
420 {
421 struct w83781d_data *data = w83781d_update_device(dev);
422 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
423 }
424
425 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
426
427 static ssize_t
428 show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
429 {
430 struct w83781d_data *data = dev_get_drvdata(dev);
431 return sprintf(buf, "%ld\n", (long) data->vrm);
432 }
433
434 static ssize_t
435 store_vrm_reg(struct device *dev, struct device_attribute *attr,
436 const char *buf, size_t count)
437 {
438 struct w83781d_data *data = dev_get_drvdata(dev);
439 unsigned long val;
440 int err;
441
442 err = kstrtoul(buf, 10, &val);
443 if (err)
444 return err;
445 data->vrm = clamp_val(val, 0, 255);
446
447 return count;
448 }
449
450 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
451
452 static ssize_t
453 show_alarms_reg(struct device *dev, struct device_attribute *attr, char *buf)
454 {
455 struct w83781d_data *data = w83781d_update_device(dev);
456 return sprintf(buf, "%u\n", data->alarms);
457 }
458
459 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms_reg, NULL);
460
461 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
462 char *buf)
463 {
464 struct w83781d_data *data = w83781d_update_device(dev);
465 int bitnr = to_sensor_dev_attr(attr)->index;
466 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
467 }
468
469 /* The W83781D has a single alarm bit for temp2 and temp3 */
470 static ssize_t show_temp3_alarm(struct device *dev,
471 struct device_attribute *attr, char *buf)
472 {
473 struct w83781d_data *data = w83781d_update_device(dev);
474 int bitnr = (data->type == w83781d) ? 5 : 13;
475 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
476 }
477
478 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
479 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
480 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
481 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
482 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
483 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9);
484 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 10);
485 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 16);
486 static SENSOR_DEVICE_ATTR(in8_alarm, S_IRUGO, show_alarm, NULL, 17);
487 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
488 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
489 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11);
490 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
491 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
492 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_temp3_alarm, NULL, 0);
493
494 static ssize_t show_beep_mask(struct device *dev,
495 struct device_attribute *attr, char *buf)
496 {
497 struct w83781d_data *data = w83781d_update_device(dev);
498 return sprintf(buf, "%ld\n",
499 (long)BEEP_MASK_FROM_REG(data->beep_mask, data->type));
500 }
501
502 static ssize_t
503 store_beep_mask(struct device *dev, struct device_attribute *attr,
504 const char *buf, size_t count)
505 {
506 struct w83781d_data *data = dev_get_drvdata(dev);
507 unsigned long val;
508 int err;
509
510 err = kstrtoul(buf, 10, &val);
511 if (err)
512 return err;
513
514 mutex_lock(&data->update_lock);
515 data->beep_mask &= 0x8000; /* preserve beep enable */
516 data->beep_mask |= BEEP_MASK_TO_REG(val, data->type);
517 w83781d_write_value(data, W83781D_REG_BEEP_INTS1,
518 data->beep_mask & 0xff);
519 w83781d_write_value(data, W83781D_REG_BEEP_INTS2,
520 (data->beep_mask >> 8) & 0xff);
521 if (data->type != w83781d && data->type != as99127f) {
522 w83781d_write_value(data, W83781D_REG_BEEP_INTS3,
523 ((data->beep_mask) >> 16) & 0xff);
524 }
525 mutex_unlock(&data->update_lock);
526
527 return count;
528 }
529
530 static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR,
531 show_beep_mask, store_beep_mask);
532
533 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
534 char *buf)
535 {
536 struct w83781d_data *data = w83781d_update_device(dev);
537 int bitnr = to_sensor_dev_attr(attr)->index;
538 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
539 }
540
541 static ssize_t
542 store_beep(struct device *dev, struct device_attribute *attr,
543 const char *buf, size_t count)
544 {
545 struct w83781d_data *data = dev_get_drvdata(dev);
546 int bitnr = to_sensor_dev_attr(attr)->index;
547 u8 reg;
548 unsigned long bit;
549 int err;
550
551 err = kstrtoul(buf, 10, &bit);
552 if (err)
553 return err;
554
555 if (bit & ~1)
556 return -EINVAL;
557
558 mutex_lock(&data->update_lock);
559 if (bit)
560 data->beep_mask |= (1 << bitnr);
561 else
562 data->beep_mask &= ~(1 << bitnr);
563
564 if (bitnr < 8) {
565 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS1);
566 if (bit)
567 reg |= (1 << bitnr);
568 else
569 reg &= ~(1 << bitnr);
570 w83781d_write_value(data, W83781D_REG_BEEP_INTS1, reg);
571 } else if (bitnr < 16) {
572 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS2);
573 if (bit)
574 reg |= (1 << (bitnr - 8));
575 else
576 reg &= ~(1 << (bitnr - 8));
577 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, reg);
578 } else {
579 reg = w83781d_read_value(data, W83781D_REG_BEEP_INTS3);
580 if (bit)
581 reg |= (1 << (bitnr - 16));
582 else
583 reg &= ~(1 << (bitnr - 16));
584 w83781d_write_value(data, W83781D_REG_BEEP_INTS3, reg);
585 }
586 mutex_unlock(&data->update_lock);
587
588 return count;
589 }
590
591 /* The W83781D has a single beep bit for temp2 and temp3 */
592 static ssize_t show_temp3_beep(struct device *dev,
593 struct device_attribute *attr, char *buf)
594 {
595 struct w83781d_data *data = w83781d_update_device(dev);
596 int bitnr = (data->type == w83781d) ? 5 : 13;
597 return sprintf(buf, "%u\n", (data->beep_mask >> bitnr) & 1);
598 }
599
600 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
601 show_beep, store_beep, 0);
602 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO | S_IWUSR,
603 show_beep, store_beep, 1);
604 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO | S_IWUSR,
605 show_beep, store_beep, 2);
606 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO | S_IWUSR,
607 show_beep, store_beep, 3);
608 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO | S_IWUSR,
609 show_beep, store_beep, 8);
610 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO | S_IWUSR,
611 show_beep, store_beep, 9);
612 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO | S_IWUSR,
613 show_beep, store_beep, 10);
614 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO | S_IWUSR,
615 show_beep, store_beep, 16);
616 static SENSOR_DEVICE_ATTR(in8_beep, S_IRUGO | S_IWUSR,
617 show_beep, store_beep, 17);
618 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO | S_IWUSR,
619 show_beep, store_beep, 6);
620 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO | S_IWUSR,
621 show_beep, store_beep, 7);
622 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO | S_IWUSR,
623 show_beep, store_beep, 11);
624 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
625 show_beep, store_beep, 4);
626 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR,
627 show_beep, store_beep, 5);
628 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO,
629 show_temp3_beep, store_beep, 13);
630 static SENSOR_DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR,
631 show_beep, store_beep, 15);
632
633 static ssize_t
634 show_fan_div(struct device *dev, struct device_attribute *da, char *buf)
635 {
636 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
637 struct w83781d_data *data = w83781d_update_device(dev);
638 return sprintf(buf, "%ld\n",
639 (long) DIV_FROM_REG(data->fan_div[attr->index]));
640 }
641
642 /*
643 * Note: we save and restore the fan minimum here, because its value is
644 * determined in part by the fan divisor. This follows the principle of
645 * least surprise; the user doesn't expect the fan minimum to change just
646 * because the divisor changed.
647 */
648 static ssize_t
649 store_fan_div(struct device *dev, struct device_attribute *da,
650 const char *buf, size_t count)
651 {
652 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
653 struct w83781d_data *data = dev_get_drvdata(dev);
654 unsigned long min;
655 int nr = attr->index;
656 u8 reg;
657 unsigned long val;
658 int err;
659
660 err = kstrtoul(buf, 10, &val);
661 if (err)
662 return err;
663
664 mutex_lock(&data->update_lock);
665
666 /* Save fan_min */
667 min = FAN_FROM_REG(data->fan_min[nr],
668 DIV_FROM_REG(data->fan_div[nr]));
669
670 data->fan_div[nr] = DIV_TO_REG(val, data->type);
671
672 reg = (w83781d_read_value(data, nr == 2 ?
673 W83781D_REG_PIN : W83781D_REG_VID_FANDIV)
674 & (nr == 0 ? 0xcf : 0x3f))
675 | ((data->fan_div[nr] & 0x03) << (nr == 0 ? 4 : 6));
676 w83781d_write_value(data, nr == 2 ?
677 W83781D_REG_PIN : W83781D_REG_VID_FANDIV, reg);
678
679 /* w83781d and as99127f don't have extended divisor bits */
680 if (data->type != w83781d && data->type != as99127f) {
681 reg = (w83781d_read_value(data, W83781D_REG_VBAT)
682 & ~(1 << (5 + nr)))
683 | ((data->fan_div[nr] & 0x04) << (3 + nr));
684 w83781d_write_value(data, W83781D_REG_VBAT, reg);
685 }
686
687 /* Restore fan_min */
688 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
689 w83781d_write_value(data, W83781D_REG_FAN_MIN(nr), data->fan_min[nr]);
690
691 mutex_unlock(&data->update_lock);
692 return count;
693 }
694
695 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
696 show_fan_div, store_fan_div, 0);
697 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR,
698 show_fan_div, store_fan_div, 1);
699 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR,
700 show_fan_div, store_fan_div, 2);
701
702 static ssize_t
703 show_pwm(struct device *dev, struct device_attribute *da, char *buf)
704 {
705 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
706 struct w83781d_data *data = w83781d_update_device(dev);
707 return sprintf(buf, "%d\n", (int)data->pwm[attr->index]);
708 }
709
710 static ssize_t
711 show_pwm2_enable(struct device *dev, struct device_attribute *da, char *buf)
712 {
713 struct w83781d_data *data = w83781d_update_device(dev);
714 return sprintf(buf, "%d\n", (int)data->pwm2_enable);
715 }
716
717 static ssize_t
718 store_pwm(struct device *dev, struct device_attribute *da, const char *buf,
719 size_t count)
720 {
721 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
722 struct w83781d_data *data = dev_get_drvdata(dev);
723 int nr = attr->index;
724 unsigned long val;
725 int err;
726
727 err = kstrtoul(buf, 10, &val);
728 if (err)
729 return err;
730
731 mutex_lock(&data->update_lock);
732 data->pwm[nr] = clamp_val(val, 0, 255);
733 w83781d_write_value(data, W83781D_REG_PWM[nr], data->pwm[nr]);
734 mutex_unlock(&data->update_lock);
735 return count;
736 }
737
738 static ssize_t
739 store_pwm2_enable(struct device *dev, struct device_attribute *da,
740 const char *buf, size_t count)
741 {
742 struct w83781d_data *data = dev_get_drvdata(dev);
743 unsigned long val;
744 u32 reg;
745 int err;
746
747 err = kstrtoul(buf, 10, &val);
748 if (err)
749 return err;
750
751 mutex_lock(&data->update_lock);
752
753 switch (val) {
754 case 0:
755 case 1:
756 reg = w83781d_read_value(data, W83781D_REG_PWMCLK12);
757 w83781d_write_value(data, W83781D_REG_PWMCLK12,
758 (reg & 0xf7) | (val << 3));
759
760 reg = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
761 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG,
762 (reg & 0xef) | (!val << 4));
763
764 data->pwm2_enable = val;
765 break;
766
767 default:
768 mutex_unlock(&data->update_lock);
769 return -EINVAL;
770 }
771
772 mutex_unlock(&data->update_lock);
773 return count;
774 }
775
776 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0);
777 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 1);
778 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 2);
779 static SENSOR_DEVICE_ATTR(pwm4, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 3);
780 /* only PWM2 can be enabled/disabled */
781 static DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR,
782 show_pwm2_enable, store_pwm2_enable);
783
784 static ssize_t
785 show_sensor(struct device *dev, struct device_attribute *da, char *buf)
786 {
787 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
788 struct w83781d_data *data = w83781d_update_device(dev);
789 return sprintf(buf, "%d\n", (int)data->sens[attr->index]);
790 }
791
792 static ssize_t
793 store_sensor(struct device *dev, struct device_attribute *da,
794 const char *buf, size_t count)
795 {
796 struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
797 struct w83781d_data *data = dev_get_drvdata(dev);
798 int nr = attr->index;
799 unsigned long val;
800 u32 tmp;
801 int err;
802
803 err = kstrtoul(buf, 10, &val);
804 if (err)
805 return err;
806
807 mutex_lock(&data->update_lock);
808
809 switch (val) {
810 case 1: /* PII/Celeron diode */
811 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
812 w83781d_write_value(data, W83781D_REG_SCFG1,
813 tmp | BIT_SCFG1[nr]);
814 tmp = w83781d_read_value(data, W83781D_REG_SCFG2);
815 w83781d_write_value(data, W83781D_REG_SCFG2,
816 tmp | BIT_SCFG2[nr]);
817 data->sens[nr] = val;
818 break;
819 case 2: /* 3904 */
820 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
821 w83781d_write_value(data, W83781D_REG_SCFG1,
822 tmp | BIT_SCFG1[nr]);
823 tmp = w83781d_read_value(data, W83781D_REG_SCFG2);
824 w83781d_write_value(data, W83781D_REG_SCFG2,
825 tmp & ~BIT_SCFG2[nr]);
826 data->sens[nr] = val;
827 break;
828 case W83781D_DEFAULT_BETA:
829 dev_warn(dev,
830 "Sensor type %d is deprecated, please use 4 instead\n",
831 W83781D_DEFAULT_BETA);
832 /* fall through */
833 case 4: /* thermistor */
834 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
835 w83781d_write_value(data, W83781D_REG_SCFG1,
836 tmp & ~BIT_SCFG1[nr]);
837 data->sens[nr] = val;
838 break;
839 default:
840 dev_err(dev, "Invalid sensor type %ld; must be 1, 2, or 4\n",
841 (long) val);
842 break;
843 }
844
845 mutex_unlock(&data->update_lock);
846 return count;
847 }
848
849 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR,
850 show_sensor, store_sensor, 0);
851 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR,
852 show_sensor, store_sensor, 1);
853 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR,
854 show_sensor, store_sensor, 2);
855
856 /*
857 * Assumes that adapter is of I2C, not ISA variety.
858 * OTHERWISE DON'T CALL THIS
859 */
860 static int
861 w83781d_detect_subclients(struct i2c_client *new_client)
862 {
863 int i, val1 = 0, id;
864 int err;
865 int address = new_client->addr;
866 unsigned short sc_addr[2];
867 struct i2c_adapter *adapter = new_client->adapter;
868 struct w83781d_data *data = i2c_get_clientdata(new_client);
869 enum chips kind = data->type;
870 int num_sc = 1;
871
872 id = i2c_adapter_id(adapter);
873
874 if (force_subclients[0] == id && force_subclients[1] == address) {
875 for (i = 2; i <= 3; i++) {
876 if (force_subclients[i] < 0x48 ||
877 force_subclients[i] > 0x4f) {
878 dev_err(&new_client->dev,
879 "Invalid subclient address %d; must be 0x48-0x4f\n",
880 force_subclients[i]);
881 err = -EINVAL;
882 goto ERROR_SC_1;
883 }
884 }
885 w83781d_write_value(data, W83781D_REG_I2C_SUBADDR,
886 (force_subclients[2] & 0x07) |
887 ((force_subclients[3] & 0x07) << 4));
888 sc_addr[0] = force_subclients[2];
889 } else {
890 val1 = w83781d_read_value(data, W83781D_REG_I2C_SUBADDR);
891 sc_addr[0] = 0x48 + (val1 & 0x07);
892 }
893
894 if (kind != w83783s) {
895 num_sc = 2;
896 if (force_subclients[0] == id &&
897 force_subclients[1] == address) {
898 sc_addr[1] = force_subclients[3];
899 } else {
900 sc_addr[1] = 0x48 + ((val1 >> 4) & 0x07);
901 }
902 if (sc_addr[0] == sc_addr[1]) {
903 dev_err(&new_client->dev,
904 "Duplicate addresses 0x%x for subclients.\n",
905 sc_addr[0]);
906 err = -EBUSY;
907 goto ERROR_SC_2;
908 }
909 }
910
911 for (i = 0; i < num_sc; i++) {
912 data->lm75[i] = i2c_new_dummy(adapter, sc_addr[i]);
913 if (!data->lm75[i]) {
914 dev_err(&new_client->dev,
915 "Subclient %d registration at address 0x%x failed.\n",
916 i, sc_addr[i]);
917 err = -ENOMEM;
918 if (i == 1)
919 goto ERROR_SC_3;
920 goto ERROR_SC_2;
921 }
922 }
923
924 return 0;
925
926 /* Undo inits in case of errors */
927 ERROR_SC_3:
928 i2c_unregister_device(data->lm75[0]);
929 ERROR_SC_2:
930 ERROR_SC_1:
931 return err;
932 }
933
934 #define IN_UNIT_ATTRS(X) \
935 &sensor_dev_attr_in##X##_input.dev_attr.attr, \
936 &sensor_dev_attr_in##X##_min.dev_attr.attr, \
937 &sensor_dev_attr_in##X##_max.dev_attr.attr, \
938 &sensor_dev_attr_in##X##_alarm.dev_attr.attr, \
939 &sensor_dev_attr_in##X##_beep.dev_attr.attr
940
941 #define FAN_UNIT_ATTRS(X) \
942 &sensor_dev_attr_fan##X##_input.dev_attr.attr, \
943 &sensor_dev_attr_fan##X##_min.dev_attr.attr, \
944 &sensor_dev_attr_fan##X##_div.dev_attr.attr, \
945 &sensor_dev_attr_fan##X##_alarm.dev_attr.attr, \
946 &sensor_dev_attr_fan##X##_beep.dev_attr.attr
947
948 #define TEMP_UNIT_ATTRS(X) \
949 &sensor_dev_attr_temp##X##_input.dev_attr.attr, \
950 &sensor_dev_attr_temp##X##_max.dev_attr.attr, \
951 &sensor_dev_attr_temp##X##_max_hyst.dev_attr.attr, \
952 &sensor_dev_attr_temp##X##_alarm.dev_attr.attr, \
953 &sensor_dev_attr_temp##X##_beep.dev_attr.attr
954
955 static struct attribute *w83781d_attributes[] = {
956 IN_UNIT_ATTRS(0),
957 IN_UNIT_ATTRS(2),
958 IN_UNIT_ATTRS(3),
959 IN_UNIT_ATTRS(4),
960 IN_UNIT_ATTRS(5),
961 IN_UNIT_ATTRS(6),
962 FAN_UNIT_ATTRS(1),
963 FAN_UNIT_ATTRS(2),
964 FAN_UNIT_ATTRS(3),
965 TEMP_UNIT_ATTRS(1),
966 TEMP_UNIT_ATTRS(2),
967 &dev_attr_cpu0_vid.attr,
968 &dev_attr_vrm.attr,
969 &dev_attr_alarms.attr,
970 &dev_attr_beep_mask.attr,
971 &sensor_dev_attr_beep_enable.dev_attr.attr,
972 NULL
973 };
974 static const struct attribute_group w83781d_group = {
975 .attrs = w83781d_attributes,
976 };
977
978 static struct attribute *w83781d_attributes_in1[] = {
979 IN_UNIT_ATTRS(1),
980 NULL
981 };
982 static const struct attribute_group w83781d_group_in1 = {
983 .attrs = w83781d_attributes_in1,
984 };
985
986 static struct attribute *w83781d_attributes_in78[] = {
987 IN_UNIT_ATTRS(7),
988 IN_UNIT_ATTRS(8),
989 NULL
990 };
991 static const struct attribute_group w83781d_group_in78 = {
992 .attrs = w83781d_attributes_in78,
993 };
994
995 static struct attribute *w83781d_attributes_temp3[] = {
996 TEMP_UNIT_ATTRS(3),
997 NULL
998 };
999 static const struct attribute_group w83781d_group_temp3 = {
1000 .attrs = w83781d_attributes_temp3,
1001 };
1002
1003 static struct attribute *w83781d_attributes_pwm12[] = {
1004 &sensor_dev_attr_pwm1.dev_attr.attr,
1005 &sensor_dev_attr_pwm2.dev_attr.attr,
1006 &dev_attr_pwm2_enable.attr,
1007 NULL
1008 };
1009 static const struct attribute_group w83781d_group_pwm12 = {
1010 .attrs = w83781d_attributes_pwm12,
1011 };
1012
1013 static struct attribute *w83781d_attributes_pwm34[] = {
1014 &sensor_dev_attr_pwm3.dev_attr.attr,
1015 &sensor_dev_attr_pwm4.dev_attr.attr,
1016 NULL
1017 };
1018 static const struct attribute_group w83781d_group_pwm34 = {
1019 .attrs = w83781d_attributes_pwm34,
1020 };
1021
1022 static struct attribute *w83781d_attributes_other[] = {
1023 &sensor_dev_attr_temp1_type.dev_attr.attr,
1024 &sensor_dev_attr_temp2_type.dev_attr.attr,
1025 &sensor_dev_attr_temp3_type.dev_attr.attr,
1026 NULL
1027 };
1028 static const struct attribute_group w83781d_group_other = {
1029 .attrs = w83781d_attributes_other,
1030 };
1031
1032 /* No clean up is done on error, it's up to the caller */
1033 static int
1034 w83781d_create_files(struct device *dev, int kind, int is_isa)
1035 {
1036 int err;
1037
1038 err = sysfs_create_group(&dev->kobj, &w83781d_group);
1039 if (err)
1040 return err;
1041
1042 if (kind != w83783s) {
1043 err = sysfs_create_group(&dev->kobj, &w83781d_group_in1);
1044 if (err)
1045 return err;
1046 }
1047 if (kind != as99127f && kind != w83781d && kind != w83783s) {
1048 err = sysfs_create_group(&dev->kobj, &w83781d_group_in78);
1049 if (err)
1050 return err;
1051 }
1052 if (kind != w83783s) {
1053 err = sysfs_create_group(&dev->kobj, &w83781d_group_temp3);
1054 if (err)
1055 return err;
1056
1057 if (kind != w83781d) {
1058 err = sysfs_chmod_file(&dev->kobj,
1059 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1060 S_IRUGO | S_IWUSR);
1061 if (err)
1062 return err;
1063 }
1064 }
1065
1066 if (kind != w83781d && kind != as99127f) {
1067 err = sysfs_create_group(&dev->kobj, &w83781d_group_pwm12);
1068 if (err)
1069 return err;
1070 }
1071 if (kind == w83782d && !is_isa) {
1072 err = sysfs_create_group(&dev->kobj, &w83781d_group_pwm34);
1073 if (err)
1074 return err;
1075 }
1076
1077 if (kind != as99127f && kind != w83781d) {
1078 err = device_create_file(dev,
1079 &sensor_dev_attr_temp1_type.dev_attr);
1080 if (err)
1081 return err;
1082 err = device_create_file(dev,
1083 &sensor_dev_attr_temp2_type.dev_attr);
1084 if (err)
1085 return err;
1086 if (kind != w83783s) {
1087 err = device_create_file(dev,
1088 &sensor_dev_attr_temp3_type.dev_attr);
1089 if (err)
1090 return err;
1091 }
1092 }
1093
1094 return 0;
1095 }
1096
1097 /* Return 0 if detection is successful, -ENODEV otherwise */
1098 static int
1099 w83781d_detect(struct i2c_client *client, struct i2c_board_info *info)
1100 {
1101 int val1, val2;
1102 struct w83781d_data *isa = w83781d_data_if_isa();
1103 struct i2c_adapter *adapter = client->adapter;
1104 int address = client->addr;
1105 const char *client_name;
1106 enum vendor { winbond, asus } vendid;
1107
1108 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1109 return -ENODEV;
1110
1111 /*
1112 * We block updates of the ISA device to minimize the risk of
1113 * concurrent access to the same W83781D chip through different
1114 * interfaces.
1115 */
1116 if (isa)
1117 mutex_lock(&isa->update_lock);
1118
1119 if (i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG) & 0x80) {
1120 dev_dbg(&adapter->dev,
1121 "Detection of w83781d chip failed at step 3\n");
1122 goto err_nodev;
1123 }
1124
1125 val1 = i2c_smbus_read_byte_data(client, W83781D_REG_BANK);
1126 val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
1127 /* Check for Winbond or Asus ID if in bank 0 */
1128 if (!(val1 & 0x07) &&
1129 ((!(val1 & 0x80) && val2 != 0xa3 && val2 != 0xc3) ||
1130 ((val1 & 0x80) && val2 != 0x5c && val2 != 0x12))) {
1131 dev_dbg(&adapter->dev,
1132 "Detection of w83781d chip failed at step 4\n");
1133 goto err_nodev;
1134 }
1135 /*
1136 * If Winbond SMBus, check address at 0x48.
1137 * Asus doesn't support, except for as99127f rev.2
1138 */
1139 if ((!(val1 & 0x80) && val2 == 0xa3) ||
1140 ((val1 & 0x80) && val2 == 0x5c)) {
1141 if (i2c_smbus_read_byte_data(client, W83781D_REG_I2C_ADDR)
1142 != address) {
1143 dev_dbg(&adapter->dev,
1144 "Detection of w83781d chip failed at step 5\n");
1145 goto err_nodev;
1146 }
1147 }
1148
1149 /* Put it now into bank 0 and Vendor ID High Byte */
1150 i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1151 (i2c_smbus_read_byte_data(client, W83781D_REG_BANK)
1152 & 0x78) | 0x80);
1153
1154 /* Get the vendor ID */
1155 val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN);
1156 if (val2 == 0x5c)
1157 vendid = winbond;
1158 else if (val2 == 0x12)
1159 vendid = asus;
1160 else {
1161 dev_dbg(&adapter->dev,
1162 "w83781d chip vendor is neither Winbond nor Asus\n");
1163 goto err_nodev;
1164 }
1165
1166 /* Determine the chip type. */
1167 val1 = i2c_smbus_read_byte_data(client, W83781D_REG_WCHIPID);
1168 if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond)
1169 client_name = "w83781d";
1170 else if (val1 == 0x30 && vendid == winbond)
1171 client_name = "w83782d";
1172 else if (val1 == 0x40 && vendid == winbond && address == 0x2d)
1173 client_name = "w83783s";
1174 else if (val1 == 0x31)
1175 client_name = "as99127f";
1176 else
1177 goto err_nodev;
1178
1179 if (val1 <= 0x30 && w83781d_alias_detect(client, val1)) {
1180 dev_dbg(&adapter->dev,
1181 "Device at 0x%02x appears to be the same as ISA device\n",
1182 address);
1183 goto err_nodev;
1184 }
1185
1186 if (isa)
1187 mutex_unlock(&isa->update_lock);
1188
1189 strlcpy(info->type, client_name, I2C_NAME_SIZE);
1190
1191 return 0;
1192
1193 err_nodev:
1194 if (isa)
1195 mutex_unlock(&isa->update_lock);
1196 return -ENODEV;
1197 }
1198
1199 static void w83781d_remove_files(struct device *dev)
1200 {
1201 sysfs_remove_group(&dev->kobj, &w83781d_group);
1202 sysfs_remove_group(&dev->kobj, &w83781d_group_in1);
1203 sysfs_remove_group(&dev->kobj, &w83781d_group_in78);
1204 sysfs_remove_group(&dev->kobj, &w83781d_group_temp3);
1205 sysfs_remove_group(&dev->kobj, &w83781d_group_pwm12);
1206 sysfs_remove_group(&dev->kobj, &w83781d_group_pwm34);
1207 sysfs_remove_group(&dev->kobj, &w83781d_group_other);
1208 }
1209
1210 static int
1211 w83781d_probe(struct i2c_client *client, const struct i2c_device_id *id)
1212 {
1213 struct device *dev = &client->dev;
1214 struct w83781d_data *data;
1215 int err;
1216
1217 data = devm_kzalloc(dev, sizeof(struct w83781d_data), GFP_KERNEL);
1218 if (!data)
1219 return -ENOMEM;
1220
1221 i2c_set_clientdata(client, data);
1222 mutex_init(&data->lock);
1223 mutex_init(&data->update_lock);
1224
1225 data->type = id->driver_data;
1226 data->client = client;
1227
1228 /* attach secondary i2c lm75-like clients */
1229 err = w83781d_detect_subclients(client);
1230 if (err)
1231 return err;
1232
1233 /* Initialize the chip */
1234 w83781d_init_device(dev);
1235
1236 /* Register sysfs hooks */
1237 err = w83781d_create_files(dev, data->type, 0);
1238 if (err)
1239 goto exit_remove_files;
1240
1241 data->hwmon_dev = hwmon_device_register(dev);
1242 if (IS_ERR(data->hwmon_dev)) {
1243 err = PTR_ERR(data->hwmon_dev);
1244 goto exit_remove_files;
1245 }
1246
1247 return 0;
1248
1249 exit_remove_files:
1250 w83781d_remove_files(dev);
1251 if (data->lm75[0])
1252 i2c_unregister_device(data->lm75[0]);
1253 if (data->lm75[1])
1254 i2c_unregister_device(data->lm75[1]);
1255 return err;
1256 }
1257
1258 static int
1259 w83781d_remove(struct i2c_client *client)
1260 {
1261 struct w83781d_data *data = i2c_get_clientdata(client);
1262 struct device *dev = &client->dev;
1263
1264 hwmon_device_unregister(data->hwmon_dev);
1265 w83781d_remove_files(dev);
1266
1267 if (data->lm75[0])
1268 i2c_unregister_device(data->lm75[0]);
1269 if (data->lm75[1])
1270 i2c_unregister_device(data->lm75[1]);
1271
1272 return 0;
1273 }
1274
1275 static int
1276 w83781d_read_value_i2c(struct w83781d_data *data, u16 reg)
1277 {
1278 struct i2c_client *client = data->client;
1279 int res, bank;
1280 struct i2c_client *cl;
1281
1282 bank = (reg >> 8) & 0x0f;
1283 if (bank > 2)
1284 /* switch banks */
1285 i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1286 bank);
1287 if (bank == 0 || bank > 2) {
1288 res = i2c_smbus_read_byte_data(client, reg & 0xff);
1289 } else {
1290 /* switch to subclient */
1291 cl = data->lm75[bank - 1];
1292 /* convert from ISA to LM75 I2C addresses */
1293 switch (reg & 0xff) {
1294 case 0x50: /* TEMP */
1295 res = i2c_smbus_read_word_swapped(cl, 0);
1296 break;
1297 case 0x52: /* CONFIG */
1298 res = i2c_smbus_read_byte_data(cl, 1);
1299 break;
1300 case 0x53: /* HYST */
1301 res = i2c_smbus_read_word_swapped(cl, 2);
1302 break;
1303 case 0x55: /* OVER */
1304 default:
1305 res = i2c_smbus_read_word_swapped(cl, 3);
1306 break;
1307 }
1308 }
1309 if (bank > 2)
1310 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1311
1312 return res;
1313 }
1314
1315 static int
1316 w83781d_write_value_i2c(struct w83781d_data *data, u16 reg, u16 value)
1317 {
1318 struct i2c_client *client = data->client;
1319 int bank;
1320 struct i2c_client *cl;
1321
1322 bank = (reg >> 8) & 0x0f;
1323 if (bank > 2)
1324 /* switch banks */
1325 i2c_smbus_write_byte_data(client, W83781D_REG_BANK,
1326 bank);
1327 if (bank == 0 || bank > 2) {
1328 i2c_smbus_write_byte_data(client, reg & 0xff,
1329 value & 0xff);
1330 } else {
1331 /* switch to subclient */
1332 cl = data->lm75[bank - 1];
1333 /* convert from ISA to LM75 I2C addresses */
1334 switch (reg & 0xff) {
1335 case 0x52: /* CONFIG */
1336 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
1337 break;
1338 case 0x53: /* HYST */
1339 i2c_smbus_write_word_swapped(cl, 2, value);
1340 break;
1341 case 0x55: /* OVER */
1342 i2c_smbus_write_word_swapped(cl, 3, value);
1343 break;
1344 }
1345 }
1346 if (bank > 2)
1347 i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
1348
1349 return 0;
1350 }
1351
1352 static void
1353 w83781d_init_device(struct device *dev)
1354 {
1355 struct w83781d_data *data = dev_get_drvdata(dev);
1356 int i, p;
1357 int type = data->type;
1358 u8 tmp;
1359
1360 if (reset && type != as99127f) { /*
1361 * this resets registers we don't have
1362 * documentation for on the as99127f
1363 */
1364 /*
1365 * Resetting the chip has been the default for a long time,
1366 * but it causes the BIOS initializations (fan clock dividers,
1367 * thermal sensor types...) to be lost, so it is now optional.
1368 * It might even go away if nobody reports it as being useful,
1369 * as I see very little reason why this would be needed at
1370 * all.
1371 */
1372 dev_info(dev,
1373 "If reset=1 solved a problem you were having, please report!\n");
1374
1375 /* save these registers */
1376 i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
1377 p = w83781d_read_value(data, W83781D_REG_PWMCLK12);
1378 /*
1379 * Reset all except Watchdog values and last conversion values
1380 * This sets fan-divs to 2, among others
1381 */
1382 w83781d_write_value(data, W83781D_REG_CONFIG, 0x80);
1383 /*
1384 * Restore the registers and disable power-on abnormal beep.
1385 * This saves FAN 1/2/3 input/output values set by BIOS.
1386 */
1387 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80);
1388 w83781d_write_value(data, W83781D_REG_PWMCLK12, p);
1389 /*
1390 * Disable master beep-enable (reset turns it on).
1391 * Individual beep_mask should be reset to off but for some
1392 * reason disabling this bit helps some people not get beeped
1393 */
1394 w83781d_write_value(data, W83781D_REG_BEEP_INTS2, 0);
1395 }
1396
1397 /*
1398 * Disable power-on abnormal beep, as advised by the datasheet.
1399 * Already done if reset=1.
1400 */
1401 if (init && !reset && type != as99127f) {
1402 i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
1403 w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80);
1404 }
1405
1406 data->vrm = vid_which_vrm();
1407
1408 if ((type != w83781d) && (type != as99127f)) {
1409 tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
1410 for (i = 1; i <= 3; i++) {
1411 if (!(tmp & BIT_SCFG1[i - 1])) {
1412 data->sens[i - 1] = 4;
1413 } else {
1414 if (w83781d_read_value
1415 (data,
1416 W83781D_REG_SCFG2) & BIT_SCFG2[i - 1])
1417 data->sens[i - 1] = 1;
1418 else
1419 data->sens[i - 1] = 2;
1420 }
1421 if (type == w83783s && i == 2)
1422 break;
1423 }
1424 }
1425
1426 if (init && type != as99127f) {
1427 /* Enable temp2 */
1428 tmp = w83781d_read_value(data, W83781D_REG_TEMP2_CONFIG);
1429 if (tmp & 0x01) {
1430 dev_warn(dev,
1431 "Enabling temp2, readings might not make sense\n");
1432 w83781d_write_value(data, W83781D_REG_TEMP2_CONFIG,
1433 tmp & 0xfe);
1434 }
1435
1436 /* Enable temp3 */
1437 if (type != w83783s) {
1438 tmp = w83781d_read_value(data,
1439 W83781D_REG_TEMP3_CONFIG);
1440 if (tmp & 0x01) {
1441 dev_warn(dev,
1442 "Enabling temp3, readings might not make sense\n");
1443 w83781d_write_value(data,
1444 W83781D_REG_TEMP3_CONFIG, tmp & 0xfe);
1445 }
1446 }
1447 }
1448
1449 /* Start monitoring */
1450 w83781d_write_value(data, W83781D_REG_CONFIG,
1451 (w83781d_read_value(data,
1452 W83781D_REG_CONFIG) & 0xf7)
1453 | 0x01);
1454
1455 /* A few vars need to be filled upon startup */
1456 for (i = 0; i < 3; i++) {
1457 data->fan_min[i] = w83781d_read_value(data,
1458 W83781D_REG_FAN_MIN(i));
1459 }
1460
1461 mutex_init(&data->update_lock);
1462 }
1463
1464 static struct w83781d_data *w83781d_update_device(struct device *dev)
1465 {
1466 struct w83781d_data *data = dev_get_drvdata(dev);
1467 struct i2c_client *client = data->client;
1468 int i;
1469
1470 mutex_lock(&data->update_lock);
1471
1472 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1473 || !data->valid) {
1474 dev_dbg(dev, "Starting device update\n");
1475
1476 for (i = 0; i <= 8; i++) {
1477 if (data->type == w83783s && i == 1)
1478 continue; /* 783S has no in1 */
1479 data->in[i] =
1480 w83781d_read_value(data, W83781D_REG_IN(i));
1481 data->in_min[i] =
1482 w83781d_read_value(data, W83781D_REG_IN_MIN(i));
1483 data->in_max[i] =
1484 w83781d_read_value(data, W83781D_REG_IN_MAX(i));
1485 if ((data->type != w83782d) && (i == 6))
1486 break;
1487 }
1488 for (i = 0; i < 3; i++) {
1489 data->fan[i] =
1490 w83781d_read_value(data, W83781D_REG_FAN(i));
1491 data->fan_min[i] =
1492 w83781d_read_value(data, W83781D_REG_FAN_MIN(i));
1493 }
1494 if (data->type != w83781d && data->type != as99127f) {
1495 for (i = 0; i < 4; i++) {
1496 data->pwm[i] =
1497 w83781d_read_value(data,
1498 W83781D_REG_PWM[i]);
1499 /* Only W83782D on SMBus has PWM3 and PWM4 */
1500 if ((data->type != w83782d || !client)
1501 && i == 1)
1502 break;
1503 }
1504 /* Only PWM2 can be disabled */
1505 data->pwm2_enable = (w83781d_read_value(data,
1506 W83781D_REG_PWMCLK12) & 0x08) >> 3;
1507 }
1508
1509 data->temp = w83781d_read_value(data, W83781D_REG_TEMP(1));
1510 data->temp_max =
1511 w83781d_read_value(data, W83781D_REG_TEMP_OVER(1));
1512 data->temp_max_hyst =
1513 w83781d_read_value(data, W83781D_REG_TEMP_HYST(1));
1514 data->temp_add[0] =
1515 w83781d_read_value(data, W83781D_REG_TEMP(2));
1516 data->temp_max_add[0] =
1517 w83781d_read_value(data, W83781D_REG_TEMP_OVER(2));
1518 data->temp_max_hyst_add[0] =
1519 w83781d_read_value(data, W83781D_REG_TEMP_HYST(2));
1520 if (data->type != w83783s) {
1521 data->temp_add[1] =
1522 w83781d_read_value(data, W83781D_REG_TEMP(3));
1523 data->temp_max_add[1] =
1524 w83781d_read_value(data,
1525 W83781D_REG_TEMP_OVER(3));
1526 data->temp_max_hyst_add[1] =
1527 w83781d_read_value(data,
1528 W83781D_REG_TEMP_HYST(3));
1529 }
1530 i = w83781d_read_value(data, W83781D_REG_VID_FANDIV);
1531 data->vid = i & 0x0f;
1532 data->vid |= (w83781d_read_value(data,
1533 W83781D_REG_CHIPID) & 0x01) << 4;
1534 data->fan_div[0] = (i >> 4) & 0x03;
1535 data->fan_div[1] = (i >> 6) & 0x03;
1536 data->fan_div[2] = (w83781d_read_value(data,
1537 W83781D_REG_PIN) >> 6) & 0x03;
1538 if ((data->type != w83781d) && (data->type != as99127f)) {
1539 i = w83781d_read_value(data, W83781D_REG_VBAT);
1540 data->fan_div[0] |= (i >> 3) & 0x04;
1541 data->fan_div[1] |= (i >> 4) & 0x04;
1542 data->fan_div[2] |= (i >> 5) & 0x04;
1543 }
1544 if (data->type == w83782d) {
1545 data->alarms = w83781d_read_value(data,
1546 W83782D_REG_ALARM1)
1547 | (w83781d_read_value(data,
1548 W83782D_REG_ALARM2) << 8)
1549 | (w83781d_read_value(data,
1550 W83782D_REG_ALARM3) << 16);
1551 } else if (data->type == w83783s) {
1552 data->alarms = w83781d_read_value(data,
1553 W83782D_REG_ALARM1)
1554 | (w83781d_read_value(data,
1555 W83782D_REG_ALARM2) << 8);
1556 } else {
1557 /*
1558 * No real-time status registers, fall back to
1559 * interrupt status registers
1560 */
1561 data->alarms = w83781d_read_value(data,
1562 W83781D_REG_ALARM1)
1563 | (w83781d_read_value(data,
1564 W83781D_REG_ALARM2) << 8);
1565 }
1566 i = w83781d_read_value(data, W83781D_REG_BEEP_INTS2);
1567 data->beep_mask = (i << 8) +
1568 w83781d_read_value(data, W83781D_REG_BEEP_INTS1);
1569 if ((data->type != w83781d) && (data->type != as99127f)) {
1570 data->beep_mask |=
1571 w83781d_read_value(data,
1572 W83781D_REG_BEEP_INTS3) << 16;
1573 }
1574 data->last_updated = jiffies;
1575 data->valid = 1;
1576 }
1577
1578 mutex_unlock(&data->update_lock);
1579
1580 return data;
1581 }
1582
1583 static const struct i2c_device_id w83781d_ids[] = {
1584 { "w83781d", w83781d, },
1585 { "w83782d", w83782d, },
1586 { "w83783s", w83783s, },
1587 { "as99127f", as99127f },
1588 { /* LIST END */ }
1589 };
1590 MODULE_DEVICE_TABLE(i2c, w83781d_ids);
1591
1592 static struct i2c_driver w83781d_driver = {
1593 .class = I2C_CLASS_HWMON,
1594 .driver = {
1595 .name = "w83781d",
1596 },
1597 .probe = w83781d_probe,
1598 .remove = w83781d_remove,
1599 .id_table = w83781d_ids,
1600 .detect = w83781d_detect,
1601 .address_list = normal_i2c,
1602 };
1603
1604 /*
1605 * ISA related code
1606 */
1607 #ifdef CONFIG_ISA
1608
1609 /* ISA device, if found */
1610 static struct platform_device *pdev;
1611
1612 static unsigned short isa_address = 0x290;
1613
1614 /*
1615 * I2C devices get this name attribute automatically, but for ISA devices
1616 * we must create it by ourselves.
1617 */
1618 static ssize_t
1619 show_name(struct device *dev, struct device_attribute *devattr, char *buf)
1620 {
1621 struct w83781d_data *data = dev_get_drvdata(dev);
1622 return sprintf(buf, "%s\n", data->name);
1623 }
1624 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1625
1626 static struct w83781d_data *w83781d_data_if_isa(void)
1627 {
1628 return pdev ? platform_get_drvdata(pdev) : NULL;
1629 }
1630
1631 /* Returns 1 if the I2C chip appears to be an alias of the ISA chip */
1632 static int w83781d_alias_detect(struct i2c_client *client, u8 chipid)
1633 {
1634 struct w83781d_data *isa;
1635 int i;
1636
1637 if (!pdev) /* No ISA chip */
1638 return 0;
1639
1640 isa = platform_get_drvdata(pdev);
1641
1642 if (w83781d_read_value(isa, W83781D_REG_I2C_ADDR) != client->addr)
1643 return 0; /* Address doesn't match */
1644 if (w83781d_read_value(isa, W83781D_REG_WCHIPID) != chipid)
1645 return 0; /* Chip type doesn't match */
1646
1647 /*
1648 * We compare all the limit registers, the config register and the
1649 * interrupt mask registers
1650 */
1651 for (i = 0x2b; i <= 0x3d; i++) {
1652 if (w83781d_read_value(isa, i) !=
1653 i2c_smbus_read_byte_data(client, i))
1654 return 0;
1655 }
1656 if (w83781d_read_value(isa, W83781D_REG_CONFIG) !=
1657 i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG))
1658 return 0;
1659 for (i = 0x43; i <= 0x46; i++) {
1660 if (w83781d_read_value(isa, i) !=
1661 i2c_smbus_read_byte_data(client, i))
1662 return 0;
1663 }
1664
1665 return 1;
1666 }
1667
1668 static int
1669 w83781d_read_value_isa(struct w83781d_data *data, u16 reg)
1670 {
1671 int word_sized, res;
1672
1673 word_sized = (((reg & 0xff00) == 0x100)
1674 || ((reg & 0xff00) == 0x200))
1675 && (((reg & 0x00ff) == 0x50)
1676 || ((reg & 0x00ff) == 0x53)
1677 || ((reg & 0x00ff) == 0x55));
1678 if (reg & 0xff00) {
1679 outb_p(W83781D_REG_BANK,
1680 data->isa_addr + W83781D_ADDR_REG_OFFSET);
1681 outb_p(reg >> 8,
1682 data->isa_addr + W83781D_DATA_REG_OFFSET);
1683 }
1684 outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET);
1685 res = inb_p(data->isa_addr + W83781D_DATA_REG_OFFSET);
1686 if (word_sized) {
1687 outb_p((reg & 0xff) + 1,
1688 data->isa_addr + W83781D_ADDR_REG_OFFSET);
1689 res =
1690 (res << 8) + inb_p(data->isa_addr +
1691 W83781D_DATA_REG_OFFSET);
1692 }
1693 if (reg & 0xff00) {
1694 outb_p(W83781D_REG_BANK,
1695 data->isa_addr + W83781D_ADDR_REG_OFFSET);
1696 outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET);
1697 }
1698 return res;
1699 }
1700
1701 static void
1702 w83781d_write_value_isa(struct w83781d_data *data, u16 reg, u16 value)
1703 {
1704 int word_sized;
1705
1706 word_sized = (((reg & 0xff00) == 0x100)
1707 || ((reg & 0xff00) == 0x200))
1708 && (((reg & 0x00ff) == 0x53)
1709 || ((reg & 0x00ff) == 0x55));
1710 if (reg & 0xff00) {
1711 outb_p(W83781D_REG_BANK,
1712 data->isa_addr + W83781D_ADDR_REG_OFFSET);
1713 outb_p(reg >> 8,
1714 data->isa_addr + W83781D_DATA_REG_OFFSET);
1715 }
1716 outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET);
1717 if (word_sized) {
1718 outb_p(value >> 8,
1719 data->isa_addr + W83781D_DATA_REG_OFFSET);
1720 outb_p((reg & 0xff) + 1,
1721 data->isa_addr + W83781D_ADDR_REG_OFFSET);
1722 }
1723 outb_p(value & 0xff, data->isa_addr + W83781D_DATA_REG_OFFSET);
1724 if (reg & 0xff00) {
1725 outb_p(W83781D_REG_BANK,
1726 data->isa_addr + W83781D_ADDR_REG_OFFSET);
1727 outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET);
1728 }
1729 }
1730
1731 /*
1732 * The SMBus locks itself, usually, but nothing may access the Winbond between
1733 * bank switches. ISA access must always be locked explicitly!
1734 * We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks,
1735 * would slow down the W83781D access and should not be necessary.
1736 * There are some ugly typecasts here, but the good news is - they should
1737 * nowhere else be necessary!
1738 */
1739 static int
1740 w83781d_read_value(struct w83781d_data *data, u16 reg)
1741 {
1742 struct i2c_client *client = data->client;
1743 int res;
1744
1745 mutex_lock(&data->lock);
1746 if (client)
1747 res = w83781d_read_value_i2c(data, reg);
1748 else
1749 res = w83781d_read_value_isa(data, reg);
1750 mutex_unlock(&data->lock);
1751 return res;
1752 }
1753
1754 static int
1755 w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
1756 {
1757 struct i2c_client *client = data->client;
1758
1759 mutex_lock(&data->lock);
1760 if (client)
1761 w83781d_write_value_i2c(data, reg, value);
1762 else
1763 w83781d_write_value_isa(data, reg, value);
1764 mutex_unlock(&data->lock);
1765 return 0;
1766 }
1767
1768 static int
1769 w83781d_isa_probe(struct platform_device *pdev)
1770 {
1771 int err, reg;
1772 struct w83781d_data *data;
1773 struct resource *res;
1774
1775 /* Reserve the ISA region */
1776 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1777 if (!devm_request_region(&pdev->dev,
1778 res->start + W83781D_ADDR_REG_OFFSET, 2,
1779 "w83781d"))
1780 return -EBUSY;
1781
1782 data = devm_kzalloc(&pdev->dev, sizeof(struct w83781d_data),
1783 GFP_KERNEL);
1784 if (!data)
1785 return -ENOMEM;
1786
1787 mutex_init(&data->lock);
1788 data->isa_addr = res->start;
1789 platform_set_drvdata(pdev, data);
1790
1791 reg = w83781d_read_value(data, W83781D_REG_WCHIPID);
1792 switch (reg) {
1793 case 0x30:
1794 data->type = w83782d;
1795 data->name = "w83782d";
1796 break;
1797 default:
1798 data->type = w83781d;
1799 data->name = "w83781d";
1800 }
1801
1802 /* Initialize the W83781D chip */
1803 w83781d_init_device(&pdev->dev);
1804
1805 /* Register sysfs hooks */
1806 err = w83781d_create_files(&pdev->dev, data->type, 1);
1807 if (err)
1808 goto exit_remove_files;
1809
1810 err = device_create_file(&pdev->dev, &dev_attr_name);
1811 if (err)
1812 goto exit_remove_files;
1813
1814 data->hwmon_dev = hwmon_device_register(&pdev->dev);
1815 if (IS_ERR(data->hwmon_dev)) {
1816 err = PTR_ERR(data->hwmon_dev);
1817 goto exit_remove_files;
1818 }
1819
1820 return 0;
1821
1822 exit_remove_files:
1823 w83781d_remove_files(&pdev->dev);
1824 device_remove_file(&pdev->dev, &dev_attr_name);
1825 return err;
1826 }
1827
1828 static int
1829 w83781d_isa_remove(struct platform_device *pdev)
1830 {
1831 struct w83781d_data *data = platform_get_drvdata(pdev);
1832
1833 hwmon_device_unregister(data->hwmon_dev);
1834 w83781d_remove_files(&pdev->dev);
1835 device_remove_file(&pdev->dev, &dev_attr_name);
1836
1837 return 0;
1838 }
1839
1840 static struct platform_driver w83781d_isa_driver = {
1841 .driver = {
1842 .owner = THIS_MODULE,
1843 .name = "w83781d",
1844 },
1845 .probe = w83781d_isa_probe,
1846 .remove = w83781d_isa_remove,
1847 };
1848
1849 /* return 1 if a supported chip is found, 0 otherwise */
1850 static int __init
1851 w83781d_isa_found(unsigned short address)
1852 {
1853 int val, save, found = 0;
1854 int port;
1855
1856 /*
1857 * Some boards declare base+0 to base+7 as a PNP device, some base+4
1858 * to base+7 and some base+5 to base+6. So we better request each port
1859 * individually for the probing phase.
1860 */
1861 for (port = address; port < address + W83781D_EXTENT; port++) {
1862 if (!request_region(port, 1, "w83781d")) {
1863 pr_debug("Failed to request port 0x%x\n", port);
1864 goto release;
1865 }
1866 }
1867
1868 #define REALLY_SLOW_IO
1869 /*
1870 * We need the timeouts for at least some W83781D-like
1871 * chips. But only if we read 'undefined' registers.
1872 */
1873 val = inb_p(address + 1);
1874 if (inb_p(address + 2) != val
1875 || inb_p(address + 3) != val
1876 || inb_p(address + 7) != val) {
1877 pr_debug("Detection failed at step %d\n", 1);
1878 goto release;
1879 }
1880 #undef REALLY_SLOW_IO
1881
1882 /*
1883 * We should be able to change the 7 LSB of the address port. The
1884 * MSB (busy flag) should be clear initially, set after the write.
1885 */
1886 save = inb_p(address + W83781D_ADDR_REG_OFFSET);
1887 if (save & 0x80) {
1888 pr_debug("Detection failed at step %d\n", 2);
1889 goto release;
1890 }
1891 val = ~save & 0x7f;
1892 outb_p(val, address + W83781D_ADDR_REG_OFFSET);
1893 if (inb_p(address + W83781D_ADDR_REG_OFFSET) != (val | 0x80)) {
1894 outb_p(save, address + W83781D_ADDR_REG_OFFSET);
1895 pr_debug("Detection failed at step %d\n", 3);
1896 goto release;
1897 }
1898
1899 /* We found a device, now see if it could be a W83781D */
1900 outb_p(W83781D_REG_CONFIG, address + W83781D_ADDR_REG_OFFSET);
1901 val = inb_p(address + W83781D_DATA_REG_OFFSET);
1902 if (val & 0x80) {
1903 pr_debug("Detection failed at step %d\n", 4);
1904 goto release;
1905 }
1906 outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET);
1907 save = inb_p(address + W83781D_DATA_REG_OFFSET);
1908 outb_p(W83781D_REG_CHIPMAN, address + W83781D_ADDR_REG_OFFSET);
1909 val = inb_p(address + W83781D_DATA_REG_OFFSET);
1910 if ((!(save & 0x80) && (val != 0xa3))
1911 || ((save & 0x80) && (val != 0x5c))) {
1912 pr_debug("Detection failed at step %d\n", 5);
1913 goto release;
1914 }
1915 outb_p(W83781D_REG_I2C_ADDR, address + W83781D_ADDR_REG_OFFSET);
1916 val = inb_p(address + W83781D_DATA_REG_OFFSET);
1917 if (val < 0x03 || val > 0x77) { /* Not a valid I2C address */
1918 pr_debug("Detection failed at step %d\n", 6);
1919 goto release;
1920 }
1921
1922 /* The busy flag should be clear again */
1923 if (inb_p(address + W83781D_ADDR_REG_OFFSET) & 0x80) {
1924 pr_debug("Detection failed at step %d\n", 7);
1925 goto release;
1926 }
1927
1928 /* Determine the chip type */
1929 outb_p(W83781D_REG_BANK, address + W83781D_ADDR_REG_OFFSET);
1930 save = inb_p(address + W83781D_DATA_REG_OFFSET);
1931 outb_p(save & 0xf8, address + W83781D_DATA_REG_OFFSET);
1932 outb_p(W83781D_REG_WCHIPID, address + W83781D_ADDR_REG_OFFSET);
1933 val = inb_p(address + W83781D_DATA_REG_OFFSET);
1934 if ((val & 0xfe) == 0x10 /* W83781D */
1935 || val == 0x30) /* W83782D */
1936 found = 1;
1937
1938 if (found)
1939 pr_info("Found a %s chip at %#x\n",
1940 val == 0x30 ? "W83782D" : "W83781D", (int)address);
1941
1942 release:
1943 for (port--; port >= address; port--)
1944 release_region(port, 1);
1945 return found;
1946 }
1947
1948 static int __init
1949 w83781d_isa_device_add(unsigned short address)
1950 {
1951 struct resource res = {
1952 .start = address,
1953 .end = address + W83781D_EXTENT - 1,
1954 .name = "w83781d",
1955 .flags = IORESOURCE_IO,
1956 };
1957 int err;
1958
1959 pdev = platform_device_alloc("w83781d", address);
1960 if (!pdev) {
1961 err = -ENOMEM;
1962 pr_err("Device allocation failed\n");
1963 goto exit;
1964 }
1965
1966 err = platform_device_add_resources(pdev, &res, 1);
1967 if (err) {
1968 pr_err("Device resource addition failed (%d)\n", err);
1969 goto exit_device_put;
1970 }
1971
1972 err = platform_device_add(pdev);
1973 if (err) {
1974 pr_err("Device addition failed (%d)\n", err);
1975 goto exit_device_put;
1976 }
1977
1978 return 0;
1979
1980 exit_device_put:
1981 platform_device_put(pdev);
1982 exit:
1983 pdev = NULL;
1984 return err;
1985 }
1986
1987 static int __init
1988 w83781d_isa_register(void)
1989 {
1990 int res;
1991
1992 if (w83781d_isa_found(isa_address)) {
1993 res = platform_driver_register(&w83781d_isa_driver);
1994 if (res)
1995 goto exit;
1996
1997 /* Sets global pdev as a side effect */
1998 res = w83781d_isa_device_add(isa_address);
1999 if (res)
2000 goto exit_unreg_isa_driver;
2001 }
2002
2003 return 0;
2004
2005 exit_unreg_isa_driver:
2006 platform_driver_unregister(&w83781d_isa_driver);
2007 exit:
2008 return res;
2009 }
2010
2011 static void
2012 w83781d_isa_unregister(void)
2013 {
2014 if (pdev) {
2015 platform_device_unregister(pdev);
2016 platform_driver_unregister(&w83781d_isa_driver);
2017 }
2018 }
2019 #else /* !CONFIG_ISA */
2020
2021 static struct w83781d_data *w83781d_data_if_isa(void)
2022 {
2023 return NULL;
2024 }
2025
2026 static int
2027 w83781d_alias_detect(struct i2c_client *client, u8 chipid)
2028 {
2029 return 0;
2030 }
2031
2032 static int
2033 w83781d_read_value(struct w83781d_data *data, u16 reg)
2034 {
2035 int res;
2036
2037 mutex_lock(&data->lock);
2038 res = w83781d_read_value_i2c(data, reg);
2039 mutex_unlock(&data->lock);
2040
2041 return res;
2042 }
2043
2044 static int
2045 w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value)
2046 {
2047 mutex_lock(&data->lock);
2048 w83781d_write_value_i2c(data, reg, value);
2049 mutex_unlock(&data->lock);
2050
2051 return 0;
2052 }
2053
2054 static int __init
2055 w83781d_isa_register(void)
2056 {
2057 return 0;
2058 }
2059
2060 static void
2061 w83781d_isa_unregister(void)
2062 {
2063 }
2064 #endif /* CONFIG_ISA */
2065
2066 static int __init
2067 sensors_w83781d_init(void)
2068 {
2069 int res;
2070
2071 /*
2072 * We register the ISA device first, so that we can skip the
2073 * registration of an I2C interface to the same device.
2074 */
2075 res = w83781d_isa_register();
2076 if (res)
2077 goto exit;
2078
2079 res = i2c_add_driver(&w83781d_driver);
2080 if (res)
2081 goto exit_unreg_isa;
2082
2083 return 0;
2084
2085 exit_unreg_isa:
2086 w83781d_isa_unregister();
2087 exit:
2088 return res;
2089 }
2090
2091 static void __exit
2092 sensors_w83781d_exit(void)
2093 {
2094 w83781d_isa_unregister();
2095 i2c_del_driver(&w83781d_driver);
2096 }
2097
2098 MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
2099 "Philip Edelbrock <phil@netroedge.com>, "
2100 "and Mark Studebaker <mdsxyz123@yahoo.com>");
2101 MODULE_DESCRIPTION("W83781D driver");
2102 MODULE_LICENSE("GPL");
2103
2104 module_init(sensors_w83781d_init);
2105 module_exit(sensors_w83781d_exit);
kernel source for telekom puls (alcatel/mediatek)