Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/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 <jdelvare@suse.de>
  8  *
  9  * This program is free software; you can redistribute it and/or modify
 10  * it under the terms of the GNU General Public License as published by
 11  * the Free Software Foundation; either version 2 of the License, or
 12  * (at your option) any later version.
 13  *
 14  * This program is distributed in the hope that it will be useful,
 15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 17  * GNU General Public License for more details.
 18  *
 19  * You should have received a copy of the GNU General Public License
 20  * along with this program; if not, write to the Free Software
 21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 22  */
 23 
 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);
2106 

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