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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * asb100.c - Part of lm_sensors, Linux kernel modules for hardware
4 * monitoring
5 *
6 * Copyright (C) 2004 Mark M. Hoffman <mhoffman@lightlink.com>
7 *
8 * (derived from w83781d.c)
9 *
10 * Copyright (C) 1998 - 2003 Frodo Looijaard <frodol@dds.nl>,
11 * Philip Edelbrock <phil@netroedge.com>, and
12 * Mark Studebaker <mdsxyz123@yahoo.com>
13 */
14
15/*
16 * This driver supports the hardware sensor chips: Asus ASB100 and
17 * ASB100-A "BACH".
18 *
19 * ASB100-A supports pwm1, while plain ASB100 does not. There is no known
20 * way for the driver to tell which one is there.
21 *
22 * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
23 * asb100 7 3 1 4 0x31 0x0694 yes no
24 */
25
26#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
27
28#include <linux/module.h>
29#include <linux/slab.h>
30#include <linux/i2c.h>
31#include <linux/hwmon.h>
32#include <linux/hwmon-sysfs.h>
33#include <linux/hwmon-vid.h>
34#include <linux/err.h>
35#include <linux/init.h>
36#include <linux/jiffies.h>
37#include <linux/mutex.h>
38#include "lm75.h"
39
40/* I2C addresses to scan */
41static const unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END };
42
43static unsigned short force_subclients[4];
44module_param_array(force_subclients, short, NULL, 0);
45MODULE_PARM_DESC(force_subclients,
46 "List of subclient addresses: {bus, clientaddr, subclientaddr1, subclientaddr2}");
47
48/* Voltage IN registers 0-6 */
49#define ASB100_REG_IN(nr) (0x20 + (nr))
50#define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2))
51#define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2))
52
53/* FAN IN registers 1-3 */
54#define ASB100_REG_FAN(nr) (0x28 + (nr))
55#define ASB100_REG_FAN_MIN(nr) (0x3b + (nr))
56
57/* TEMPERATURE registers 1-4 */
58static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17};
59static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18};
60static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19};
61
62#define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr])
63#define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr])
64#define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr])
65
66#define ASB100_REG_TEMP2_CONFIG 0x0152
67#define ASB100_REG_TEMP3_CONFIG 0x0252
68
69
70#define ASB100_REG_CONFIG 0x40
71#define ASB100_REG_ALARM1 0x41
72#define ASB100_REG_ALARM2 0x42
73#define ASB100_REG_SMIM1 0x43
74#define ASB100_REG_SMIM2 0x44
75#define ASB100_REG_VID_FANDIV 0x47
76#define ASB100_REG_I2C_ADDR 0x48
77#define ASB100_REG_CHIPID 0x49
78#define ASB100_REG_I2C_SUBADDR 0x4a
79#define ASB100_REG_PIN 0x4b
80#define ASB100_REG_IRQ 0x4c
81#define ASB100_REG_BANK 0x4e
82#define ASB100_REG_CHIPMAN 0x4f
83
84#define ASB100_REG_WCHIPID 0x58
85
86/* bit 7 -> enable, bits 0-3 -> duty cycle */
87#define ASB100_REG_PWM1 0x59
88
89/*
90 * CONVERSIONS
91 * Rounding and limit checking is only done on the TO_REG variants.
92 */
93
94/* These constants are a guess, consistent w/ w83781d */
95#define ASB100_IN_MIN 0
96#define ASB100_IN_MAX 4080
97
98/*
99 * IN: 1/1000 V (0V to 4.08V)
100 * REG: 16mV/bit
101 */
102static u8 IN_TO_REG(unsigned val)
103{
104 unsigned nval = clamp_val(val, ASB100_IN_MIN, ASB100_IN_MAX);
105 return (nval + 8) / 16;
106}
107
108static unsigned IN_FROM_REG(u8 reg)
109{
110 return reg * 16;
111}
112
113static u8 FAN_TO_REG(long rpm, int div)
114{
115 if (rpm == -1)
116 return 0;
117 if (rpm == 0)
118 return 255;
119 rpm = clamp_val(rpm, 1, 1000000);
120 return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
121}
122
123static int FAN_FROM_REG(u8 val, int div)
124{
125 return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
126}
127
128/* These constants are a guess, consistent w/ w83781d */
129#define ASB100_TEMP_MIN -128000
130#define ASB100_TEMP_MAX 127000
131
132/*
133 * TEMP: 0.001C/bit (-128C to +127C)
134 * REG: 1C/bit, two's complement
135 */
136static u8 TEMP_TO_REG(long temp)
137{
138 int ntemp = clamp_val(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX);
139 ntemp += (ntemp < 0 ? -500 : 500);
140 return (u8)(ntemp / 1000);
141}
142
143static int TEMP_FROM_REG(u8 reg)
144{
145 return (s8)reg * 1000;
146}
147
148/*
149 * PWM: 0 - 255 per sensors documentation
150 * REG: (6.25% duty cycle per bit)
151 */
152static u8 ASB100_PWM_TO_REG(int pwm)
153{
154 pwm = clamp_val(pwm, 0, 255);
155 return (u8)(pwm / 16);
156}
157
158static int ASB100_PWM_FROM_REG(u8 reg)
159{
160 return reg * 16;
161}
162
163#define DIV_FROM_REG(val) (1 << (val))
164
165/*
166 * FAN DIV: 1, 2, 4, or 8 (defaults to 2)
167 * REG: 0, 1, 2, or 3 (respectively) (defaults to 1)
168 */
169static u8 DIV_TO_REG(long val)
170{
171 return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1;
172}
173
174/*
175 * For each registered client, we need to keep some data in memory. That
176 * data is pointed to by client->data. The structure itself is
177 * dynamically allocated, at the same time the client itself is allocated.
178 */
179struct asb100_data {
180 struct device *hwmon_dev;
181 struct mutex lock;
182
183 struct mutex update_lock;
184 unsigned long last_updated; /* In jiffies */
185
186 /* array of 2 pointers to subclients */
187 struct i2c_client *lm75[2];
188
189 char valid; /* !=0 if following fields are valid */
190 u8 in[7]; /* Register value */
191 u8 in_max[7]; /* Register value */
192 u8 in_min[7]; /* Register value */
193 u8 fan[3]; /* Register value */
194 u8 fan_min[3]; /* Register value */
195 u16 temp[4]; /* Register value (0 and 3 are u8 only) */
196 u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */
197 u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */
198 u8 fan_div[3]; /* Register encoding, right justified */
199 u8 pwm; /* Register encoding */
200 u8 vid; /* Register encoding, combined */
201 u32 alarms; /* Register encoding, combined */
202 u8 vrm;
203};
204
205static int asb100_read_value(struct i2c_client *client, u16 reg);
206static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val);
207
208static int asb100_probe(struct i2c_client *client,
209 const struct i2c_device_id *id);
210static int asb100_detect(struct i2c_client *client,
211 struct i2c_board_info *info);
212static int asb100_remove(struct i2c_client *client);
213static struct asb100_data *asb100_update_device(struct device *dev);
214static void asb100_init_client(struct i2c_client *client);
215
216static const struct i2c_device_id asb100_id[] = {
217 { "asb100", 0 },
218 { }
219};
220MODULE_DEVICE_TABLE(i2c, asb100_id);
221
222static struct i2c_driver asb100_driver = {
223 .class = I2C_CLASS_HWMON,
224 .driver = {
225 .name = "asb100",
226 },
227 .probe = asb100_probe,
228 .remove = asb100_remove,
229 .id_table = asb100_id,
230 .detect = asb100_detect,
231 .address_list = normal_i2c,
232};
233
234/* 7 Voltages */
235#define show_in_reg(reg) \
236static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
237 char *buf) \
238{ \
239 int nr = to_sensor_dev_attr(attr)->index; \
240 struct asb100_data *data = asb100_update_device(dev); \
241 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
242}
243
244show_in_reg(in)
245show_in_reg(in_min)
246show_in_reg(in_max)
247
248#define set_in_reg(REG, reg) \
249static ssize_t set_in_##reg(struct device *dev, struct device_attribute *attr, \
250 const char *buf, size_t count) \
251{ \
252 int nr = to_sensor_dev_attr(attr)->index; \
253 struct i2c_client *client = to_i2c_client(dev); \
254 struct asb100_data *data = i2c_get_clientdata(client); \
255 unsigned long val; \
256 int err = kstrtoul(buf, 10, &val); \
257 if (err) \
258 return err; \
259 mutex_lock(&data->update_lock); \
260 data->in_##reg[nr] = IN_TO_REG(val); \
261 asb100_write_value(client, ASB100_REG_IN_##REG(nr), \
262 data->in_##reg[nr]); \
263 mutex_unlock(&data->update_lock); \
264 return count; \
265}
266
267set_in_reg(MIN, min)
268set_in_reg(MAX, max)
269
270#define sysfs_in(offset) \
271static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
272 show_in, NULL, offset); \
273static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
274 show_in_min, set_in_min, offset); \
275static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
276 show_in_max, set_in_max, offset)
277
278sysfs_in(0);
279sysfs_in(1);
280sysfs_in(2);
281sysfs_in(3);
282sysfs_in(4);
283sysfs_in(5);
284sysfs_in(6);
285
286/* 3 Fans */
287static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
288 char *buf)
289{
290 int nr = to_sensor_dev_attr(attr)->index;
291 struct asb100_data *data = asb100_update_device(dev);
292 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
293 DIV_FROM_REG(data->fan_div[nr])));
294}
295
296static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
297 char *buf)
298{
299 int nr = to_sensor_dev_attr(attr)->index;
300 struct asb100_data *data = asb100_update_device(dev);
301 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
302 DIV_FROM_REG(data->fan_div[nr])));
303}
304
305static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
306 char *buf)
307{
308 int nr = to_sensor_dev_attr(attr)->index;
309 struct asb100_data *data = asb100_update_device(dev);
310 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
311}
312
313static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
314 const char *buf, size_t count)
315{
316 int nr = to_sensor_dev_attr(attr)->index;
317 struct i2c_client *client = to_i2c_client(dev);
318 struct asb100_data *data = i2c_get_clientdata(client);
319 unsigned long val;
320 int err;
321
322 err = kstrtoul(buf, 10, &val);
323 if (err)
324 return err;
325
326 mutex_lock(&data->update_lock);
327 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
328 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
329 mutex_unlock(&data->update_lock);
330 return count;
331}
332
333/*
334 * Note: we save and restore the fan minimum here, because its value is
335 * determined in part by the fan divisor. This follows the principle of
336 * least surprise; the user doesn't expect the fan minimum to change just
337 * because the divisor changed.
338 */
339static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
340 const char *buf, size_t count)
341{
342 int nr = to_sensor_dev_attr(attr)->index;
343 struct i2c_client *client = to_i2c_client(dev);
344 struct asb100_data *data = i2c_get_clientdata(client);
345 unsigned long min;
346 int reg;
347 unsigned long val;
348 int err;
349
350 err = kstrtoul(buf, 10, &val);
351 if (err)
352 return err;
353
354 mutex_lock(&data->update_lock);
355
356 min = FAN_FROM_REG(data->fan_min[nr],
357 DIV_FROM_REG(data->fan_div[nr]));
358 data->fan_div[nr] = DIV_TO_REG(val);
359
360 switch (nr) {
361 case 0: /* fan 1 */
362 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
363 reg = (reg & 0xcf) | (data->fan_div[0] << 4);
364 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
365 break;
366
367 case 1: /* fan 2 */
368 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
369 reg = (reg & 0x3f) | (data->fan_div[1] << 6);
370 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
371 break;
372
373 case 2: /* fan 3 */
374 reg = asb100_read_value(client, ASB100_REG_PIN);
375 reg = (reg & 0x3f) | (data->fan_div[2] << 6);
376 asb100_write_value(client, ASB100_REG_PIN, reg);
377 break;
378 }
379
380 data->fan_min[nr] =
381 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
382 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
383
384 mutex_unlock(&data->update_lock);
385
386 return count;
387}
388
389#define sysfs_fan(offset) \
390static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
391 show_fan, NULL, offset - 1); \
392static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
393 show_fan_min, set_fan_min, offset - 1); \
394static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
395 show_fan_div, set_fan_div, offset - 1)
396
397sysfs_fan(1);
398sysfs_fan(2);
399sysfs_fan(3);
400
401/* 4 Temp. Sensors */
402static int sprintf_temp_from_reg(u16 reg, char *buf, int nr)
403{
404 int ret = 0;
405
406 switch (nr) {
407 case 1: case 2:
408 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg));
409 break;
410 case 0: case 3: default:
411 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg));
412 break;
413 }
414 return ret;
415}
416
417#define show_temp_reg(reg) \
418static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
419 char *buf) \
420{ \
421 int nr = to_sensor_dev_attr(attr)->index; \
422 struct asb100_data *data = asb100_update_device(dev); \
423 return sprintf_temp_from_reg(data->reg[nr], buf, nr); \
424}
425
426show_temp_reg(temp);
427show_temp_reg(temp_max);
428show_temp_reg(temp_hyst);
429
430#define set_temp_reg(REG, reg) \
431static ssize_t set_##reg(struct device *dev, struct device_attribute *attr, \
432 const char *buf, size_t count) \
433{ \
434 int nr = to_sensor_dev_attr(attr)->index; \
435 struct i2c_client *client = to_i2c_client(dev); \
436 struct asb100_data *data = i2c_get_clientdata(client); \
437 long val; \
438 int err = kstrtol(buf, 10, &val); \
439 if (err) \
440 return err; \
441 mutex_lock(&data->update_lock); \
442 switch (nr) { \
443 case 1: case 2: \
444 data->reg[nr] = LM75_TEMP_TO_REG(val); \
445 break; \
446 case 0: case 3: default: \
447 data->reg[nr] = TEMP_TO_REG(val); \
448 break; \
449 } \
450 asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \
451 data->reg[nr]); \
452 mutex_unlock(&data->update_lock); \
453 return count; \
454}
455
456set_temp_reg(MAX, temp_max);
457set_temp_reg(HYST, temp_hyst);
458
459#define sysfs_temp(num) \
460static SENSOR_DEVICE_ATTR(temp##num##_input, S_IRUGO, \
461 show_temp, NULL, num - 1); \
462static SENSOR_DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \
463 show_temp_max, set_temp_max, num - 1); \
464static SENSOR_DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \
465 show_temp_hyst, set_temp_hyst, num - 1)
466
467sysfs_temp(1);
468sysfs_temp(2);
469sysfs_temp(3);
470sysfs_temp(4);
471
472/* VID */
473static ssize_t cpu0_vid_show(struct device *dev,
474 struct device_attribute *attr, char *buf)
475{
476 struct asb100_data *data = asb100_update_device(dev);
477 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
478}
479
480static DEVICE_ATTR_RO(cpu0_vid);
481
482/* VRM */
483static ssize_t vrm_show(struct device *dev, struct device_attribute *attr,
484 char *buf)
485{
486 struct asb100_data *data = dev_get_drvdata(dev);
487 return sprintf(buf, "%d\n", data->vrm);
488}
489
490static ssize_t vrm_store(struct device *dev, struct device_attribute *attr,
491 const char *buf, size_t count)
492{
493 struct asb100_data *data = dev_get_drvdata(dev);
494 unsigned long val;
495 int err;
496
497 err = kstrtoul(buf, 10, &val);
498 if (err)
499 return err;
500
501 if (val > 255)
502 return -EINVAL;
503
504 data->vrm = val;
505 return count;
506}
507
508/* Alarms */
509static DEVICE_ATTR_RW(vrm);
510
511static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
512 char *buf)
513{
514 struct asb100_data *data = asb100_update_device(dev);
515 return sprintf(buf, "%u\n", data->alarms);
516}
517
518static DEVICE_ATTR_RO(alarms);
519
520static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
521 char *buf)
522{
523 int bitnr = to_sensor_dev_attr(attr)->index;
524 struct asb100_data *data = asb100_update_device(dev);
525 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
526}
527static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
528static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
529static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
530static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
531static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
532static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
533static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
534static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11);
535static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
536static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
537static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13);
538
539/* 1 PWM */
540static ssize_t pwm1_show(struct device *dev, struct device_attribute *attr,
541 char *buf)
542{
543 struct asb100_data *data = asb100_update_device(dev);
544 return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f));
545}
546
547static ssize_t pwm1_store(struct device *dev, struct device_attribute *attr,
548 const char *buf, size_t count)
549{
550 struct i2c_client *client = to_i2c_client(dev);
551 struct asb100_data *data = i2c_get_clientdata(client);
552 unsigned long val;
553 int err;
554
555 err = kstrtoul(buf, 10, &val);
556 if (err)
557 return err;
558
559 mutex_lock(&data->update_lock);
560 data->pwm &= 0x80; /* keep the enable bit */
561 data->pwm |= (0x0f & ASB100_PWM_TO_REG(val));
562 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
563 mutex_unlock(&data->update_lock);
564 return count;
565}
566
567static ssize_t pwm1_enable_show(struct device *dev,
568 struct device_attribute *attr, char *buf)
569{
570 struct asb100_data *data = asb100_update_device(dev);
571 return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0);
572}
573
574static ssize_t pwm1_enable_store(struct device *dev,
575 struct device_attribute *attr,
576 const char *buf, size_t count)
577{
578 struct i2c_client *client = to_i2c_client(dev);
579 struct asb100_data *data = i2c_get_clientdata(client);
580 unsigned long val;
581 int err;
582
583 err = kstrtoul(buf, 10, &val);
584 if (err)
585 return err;
586
587 mutex_lock(&data->update_lock);
588 data->pwm &= 0x0f; /* keep the duty cycle bits */
589 data->pwm |= (val ? 0x80 : 0x00);
590 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
591 mutex_unlock(&data->update_lock);
592 return count;
593}
594
595static DEVICE_ATTR_RW(pwm1);
596static DEVICE_ATTR_RW(pwm1_enable);
597
598static struct attribute *asb100_attributes[] = {
599 &sensor_dev_attr_in0_input.dev_attr.attr,
600 &sensor_dev_attr_in0_min.dev_attr.attr,
601 &sensor_dev_attr_in0_max.dev_attr.attr,
602 &sensor_dev_attr_in1_input.dev_attr.attr,
603 &sensor_dev_attr_in1_min.dev_attr.attr,
604 &sensor_dev_attr_in1_max.dev_attr.attr,
605 &sensor_dev_attr_in2_input.dev_attr.attr,
606 &sensor_dev_attr_in2_min.dev_attr.attr,
607 &sensor_dev_attr_in2_max.dev_attr.attr,
608 &sensor_dev_attr_in3_input.dev_attr.attr,
609 &sensor_dev_attr_in3_min.dev_attr.attr,
610 &sensor_dev_attr_in3_max.dev_attr.attr,
611 &sensor_dev_attr_in4_input.dev_attr.attr,
612 &sensor_dev_attr_in4_min.dev_attr.attr,
613 &sensor_dev_attr_in4_max.dev_attr.attr,
614 &sensor_dev_attr_in5_input.dev_attr.attr,
615 &sensor_dev_attr_in5_min.dev_attr.attr,
616 &sensor_dev_attr_in5_max.dev_attr.attr,
617 &sensor_dev_attr_in6_input.dev_attr.attr,
618 &sensor_dev_attr_in6_min.dev_attr.attr,
619 &sensor_dev_attr_in6_max.dev_attr.attr,
620
621 &sensor_dev_attr_fan1_input.dev_attr.attr,
622 &sensor_dev_attr_fan1_min.dev_attr.attr,
623 &sensor_dev_attr_fan1_div.dev_attr.attr,
624 &sensor_dev_attr_fan2_input.dev_attr.attr,
625 &sensor_dev_attr_fan2_min.dev_attr.attr,
626 &sensor_dev_attr_fan2_div.dev_attr.attr,
627 &sensor_dev_attr_fan3_input.dev_attr.attr,
628 &sensor_dev_attr_fan3_min.dev_attr.attr,
629 &sensor_dev_attr_fan3_div.dev_attr.attr,
630
631 &sensor_dev_attr_temp1_input.dev_attr.attr,
632 &sensor_dev_attr_temp1_max.dev_attr.attr,
633 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
634 &sensor_dev_attr_temp2_input.dev_attr.attr,
635 &sensor_dev_attr_temp2_max.dev_attr.attr,
636 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
637 &sensor_dev_attr_temp3_input.dev_attr.attr,
638 &sensor_dev_attr_temp3_max.dev_attr.attr,
639 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
640 &sensor_dev_attr_temp4_input.dev_attr.attr,
641 &sensor_dev_attr_temp4_max.dev_attr.attr,
642 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
643
644 &sensor_dev_attr_in0_alarm.dev_attr.attr,
645 &sensor_dev_attr_in1_alarm.dev_attr.attr,
646 &sensor_dev_attr_in2_alarm.dev_attr.attr,
647 &sensor_dev_attr_in3_alarm.dev_attr.attr,
648 &sensor_dev_attr_in4_alarm.dev_attr.attr,
649 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
650 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
651 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
652 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
653 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
654 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
655
656 &dev_attr_cpu0_vid.attr,
657 &dev_attr_vrm.attr,
658 &dev_attr_alarms.attr,
659 &dev_attr_pwm1.attr,
660 &dev_attr_pwm1_enable.attr,
661
662 NULL
663};
664
665static const struct attribute_group asb100_group = {
666 .attrs = asb100_attributes,
667};
668
669static int asb100_detect_subclients(struct i2c_client *client)
670{
671 int i, id, err;
672 int address = client->addr;
673 unsigned short sc_addr[2];
674 struct asb100_data *data = i2c_get_clientdata(client);
675 struct i2c_adapter *adapter = client->adapter;
676
677 id = i2c_adapter_id(adapter);
678
679 if (force_subclients[0] == id && force_subclients[1] == address) {
680 for (i = 2; i <= 3; i++) {
681 if (force_subclients[i] < 0x48 ||
682 force_subclients[i] > 0x4f) {
683 dev_err(&client->dev,
684 "invalid subclient address %d; must be 0x48-0x4f\n",
685 force_subclients[i]);
686 err = -ENODEV;
687 goto ERROR_SC_2;
688 }
689 }
690 asb100_write_value(client, ASB100_REG_I2C_SUBADDR,
691 (force_subclients[2] & 0x07) |
692 ((force_subclients[3] & 0x07) << 4));
693 sc_addr[0] = force_subclients[2];
694 sc_addr[1] = force_subclients[3];
695 } else {
696 int val = asb100_read_value(client, ASB100_REG_I2C_SUBADDR);
697 sc_addr[0] = 0x48 + (val & 0x07);
698 sc_addr[1] = 0x48 + ((val >> 4) & 0x07);
699 }
700
701 if (sc_addr[0] == sc_addr[1]) {
702 dev_err(&client->dev,
703 "duplicate addresses 0x%x for subclients\n",
704 sc_addr[0]);
705 err = -ENODEV;
706 goto ERROR_SC_2;
707 }
708
709 data->lm75[0] = i2c_new_dummy_device(adapter, sc_addr[0]);
710 if (IS_ERR(data->lm75[0])) {
711 dev_err(&client->dev,
712 "subclient %d registration at address 0x%x failed.\n",
713 1, sc_addr[0]);
714 err = PTR_ERR(data->lm75[0]);
715 goto ERROR_SC_2;
716 }
717
718 data->lm75[1] = i2c_new_dummy_device(adapter, sc_addr[1]);
719 if (IS_ERR(data->lm75[1])) {
720 dev_err(&client->dev,
721 "subclient %d registration at address 0x%x failed.\n",
722 2, sc_addr[1]);
723 err = PTR_ERR(data->lm75[1]);
724 goto ERROR_SC_3;
725 }
726
727 return 0;
728
729/* Undo inits in case of errors */
730ERROR_SC_3:
731 i2c_unregister_device(data->lm75[0]);
732ERROR_SC_2:
733 return err;
734}
735
736/* Return 0 if detection is successful, -ENODEV otherwise */
737static int asb100_detect(struct i2c_client *client,
738 struct i2c_board_info *info)
739{
740 struct i2c_adapter *adapter = client->adapter;
741 int val1, val2;
742
743 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
744 pr_debug("detect failed, smbus byte data not supported!\n");
745 return -ENODEV;
746 }
747
748 val1 = i2c_smbus_read_byte_data(client, ASB100_REG_BANK);
749 val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN);
750
751 /* If we're in bank 0 */
752 if ((!(val1 & 0x07)) &&
753 /* Check for ASB100 ID (low byte) */
754 (((!(val1 & 0x80)) && (val2 != 0x94)) ||
755 /* Check for ASB100 ID (high byte ) */
756 ((val1 & 0x80) && (val2 != 0x06)))) {
757 pr_debug("detect failed, bad chip id 0x%02x!\n", val2);
758 return -ENODEV;
759 }
760
761 /* Put it now into bank 0 and Vendor ID High Byte */
762 i2c_smbus_write_byte_data(client, ASB100_REG_BANK,
763 (i2c_smbus_read_byte_data(client, ASB100_REG_BANK) & 0x78)
764 | 0x80);
765
766 /* Determine the chip type. */
767 val1 = i2c_smbus_read_byte_data(client, ASB100_REG_WCHIPID);
768 val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN);
769
770 if (val1 != 0x31 || val2 != 0x06)
771 return -ENODEV;
772
773 strlcpy(info->type, "asb100", I2C_NAME_SIZE);
774
775 return 0;
776}
777
778static int asb100_probe(struct i2c_client *client,
779 const struct i2c_device_id *id)
780{
781 int err;
782 struct asb100_data *data;
783
784 data = devm_kzalloc(&client->dev, sizeof(struct asb100_data),
785 GFP_KERNEL);
786 if (!data)
787 return -ENOMEM;
788
789 i2c_set_clientdata(client, data);
790 mutex_init(&data->lock);
791 mutex_init(&data->update_lock);
792
793 /* Attach secondary lm75 clients */
794 err = asb100_detect_subclients(client);
795 if (err)
796 return err;
797
798 /* Initialize the chip */
799 asb100_init_client(client);
800
801 /* A few vars need to be filled upon startup */
802 data->fan_min[0] = asb100_read_value(client, ASB100_REG_FAN_MIN(0));
803 data->fan_min[1] = asb100_read_value(client, ASB100_REG_FAN_MIN(1));
804 data->fan_min[2] = asb100_read_value(client, ASB100_REG_FAN_MIN(2));
805
806 /* Register sysfs hooks */
807 err = sysfs_create_group(&client->dev.kobj, &asb100_group);
808 if (err)
809 goto ERROR3;
810
811 data->hwmon_dev = hwmon_device_register(&client->dev);
812 if (IS_ERR(data->hwmon_dev)) {
813 err = PTR_ERR(data->hwmon_dev);
814 goto ERROR4;
815 }
816
817 return 0;
818
819ERROR4:
820 sysfs_remove_group(&client->dev.kobj, &asb100_group);
821ERROR3:
822 i2c_unregister_device(data->lm75[1]);
823 i2c_unregister_device(data->lm75[0]);
824 return err;
825}
826
827static int asb100_remove(struct i2c_client *client)
828{
829 struct asb100_data *data = i2c_get_clientdata(client);
830
831 hwmon_device_unregister(data->hwmon_dev);
832 sysfs_remove_group(&client->dev.kobj, &asb100_group);
833
834 i2c_unregister_device(data->lm75[1]);
835 i2c_unregister_device(data->lm75[0]);
836
837 return 0;
838}
839
840/*
841 * The SMBus locks itself, usually, but nothing may access the chip between
842 * bank switches.
843 */
844static int asb100_read_value(struct i2c_client *client, u16 reg)
845{
846 struct asb100_data *data = i2c_get_clientdata(client);
847 struct i2c_client *cl;
848 int res, bank;
849
850 mutex_lock(&data->lock);
851
852 bank = (reg >> 8) & 0x0f;
853 if (bank > 2)
854 /* switch banks */
855 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
856
857 if (bank == 0 || bank > 2) {
858 res = i2c_smbus_read_byte_data(client, reg & 0xff);
859 } else {
860 /* switch to subclient */
861 cl = data->lm75[bank - 1];
862
863 /* convert from ISA to LM75 I2C addresses */
864 switch (reg & 0xff) {
865 case 0x50: /* TEMP */
866 res = i2c_smbus_read_word_swapped(cl, 0);
867 break;
868 case 0x52: /* CONFIG */
869 res = i2c_smbus_read_byte_data(cl, 1);
870 break;
871 case 0x53: /* HYST */
872 res = i2c_smbus_read_word_swapped(cl, 2);
873 break;
874 case 0x55: /* MAX */
875 default:
876 res = i2c_smbus_read_word_swapped(cl, 3);
877 break;
878 }
879 }
880
881 if (bank > 2)
882 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
883
884 mutex_unlock(&data->lock);
885
886 return res;
887}
888
889static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value)
890{
891 struct asb100_data *data = i2c_get_clientdata(client);
892 struct i2c_client *cl;
893 int bank;
894
895 mutex_lock(&data->lock);
896
897 bank = (reg >> 8) & 0x0f;
898 if (bank > 2)
899 /* switch banks */
900 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
901
902 if (bank == 0 || bank > 2) {
903 i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff);
904 } else {
905 /* switch to subclient */
906 cl = data->lm75[bank - 1];
907
908 /* convert from ISA to LM75 I2C addresses */
909 switch (reg & 0xff) {
910 case 0x52: /* CONFIG */
911 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
912 break;
913 case 0x53: /* HYST */
914 i2c_smbus_write_word_swapped(cl, 2, value);
915 break;
916 case 0x55: /* MAX */
917 i2c_smbus_write_word_swapped(cl, 3, value);
918 break;
919 }
920 }
921
922 if (bank > 2)
923 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
924
925 mutex_unlock(&data->lock);
926}
927
928static void asb100_init_client(struct i2c_client *client)
929{
930 struct asb100_data *data = i2c_get_clientdata(client);
931
932 data->vrm = vid_which_vrm();
933
934 /* Start monitoring */
935 asb100_write_value(client, ASB100_REG_CONFIG,
936 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01);
937}
938
939static struct asb100_data *asb100_update_device(struct device *dev)
940{
941 struct i2c_client *client = to_i2c_client(dev);
942 struct asb100_data *data = i2c_get_clientdata(client);
943 int i;
944
945 mutex_lock(&data->update_lock);
946
947 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
948 || !data->valid) {
949
950 dev_dbg(&client->dev, "starting device update...\n");
951
952 /* 7 voltage inputs */
953 for (i = 0; i < 7; i++) {
954 data->in[i] = asb100_read_value(client,
955 ASB100_REG_IN(i));
956 data->in_min[i] = asb100_read_value(client,
957 ASB100_REG_IN_MIN(i));
958 data->in_max[i] = asb100_read_value(client,
959 ASB100_REG_IN_MAX(i));
960 }
961
962 /* 3 fan inputs */
963 for (i = 0; i < 3; i++) {
964 data->fan[i] = asb100_read_value(client,
965 ASB100_REG_FAN(i));
966 data->fan_min[i] = asb100_read_value(client,
967 ASB100_REG_FAN_MIN(i));
968 }
969
970 /* 4 temperature inputs */
971 for (i = 1; i <= 4; i++) {
972 data->temp[i-1] = asb100_read_value(client,
973 ASB100_REG_TEMP(i));
974 data->temp_max[i-1] = asb100_read_value(client,
975 ASB100_REG_TEMP_MAX(i));
976 data->temp_hyst[i-1] = asb100_read_value(client,
977 ASB100_REG_TEMP_HYST(i));
978 }
979
980 /* VID and fan divisors */
981 i = asb100_read_value(client, ASB100_REG_VID_FANDIV);
982 data->vid = i & 0x0f;
983 data->vid |= (asb100_read_value(client,
984 ASB100_REG_CHIPID) & 0x01) << 4;
985 data->fan_div[0] = (i >> 4) & 0x03;
986 data->fan_div[1] = (i >> 6) & 0x03;
987 data->fan_div[2] = (asb100_read_value(client,
988 ASB100_REG_PIN) >> 6) & 0x03;
989
990 /* PWM */
991 data->pwm = asb100_read_value(client, ASB100_REG_PWM1);
992
993 /* alarms */
994 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) +
995 (asb100_read_value(client, ASB100_REG_ALARM2) << 8);
996
997 data->last_updated = jiffies;
998 data->valid = 1;
999
1000 dev_dbg(&client->dev, "... device update complete\n");
1001 }
1002
1003 mutex_unlock(&data->update_lock);
1004
1005 return data;
1006}
1007
1008module_i2c_driver(asb100_driver);
1009
1010MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
1011MODULE_DESCRIPTION("ASB100 Bach driver");
1012MODULE_LICENSE("GPL");
1/*
2 asb100.c - Part of lm_sensors, Linux kernel modules for hardware
3 monitoring
4
5 Copyright (C) 2004 Mark M. Hoffman <mhoffman@lightlink.com>
6
7 (derived from w83781d.c)
8
9 Copyright (C) 1998 - 2003 Frodo Looijaard <frodol@dds.nl>,
10 Philip Edelbrock <phil@netroedge.com>, and
11 Mark Studebaker <mdsxyz123@yahoo.com>
12
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
17
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
22
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26*/
27
28/*
29 This driver supports the hardware sensor chips: Asus ASB100 and
30 ASB100-A "BACH".
31
32 ASB100-A supports pwm1, while plain ASB100 does not. There is no known
33 way for the driver to tell which one is there.
34
35 Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
36 asb100 7 3 1 4 0x31 0x0694 yes no
37*/
38
39#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
40
41#include <linux/module.h>
42#include <linux/slab.h>
43#include <linux/i2c.h>
44#include <linux/hwmon.h>
45#include <linux/hwmon-sysfs.h>
46#include <linux/hwmon-vid.h>
47#include <linux/err.h>
48#include <linux/init.h>
49#include <linux/jiffies.h>
50#include <linux/mutex.h>
51#include "lm75.h"
52
53/* I2C addresses to scan */
54static const unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END };
55
56static unsigned short force_subclients[4];
57module_param_array(force_subclients, short, NULL, 0);
58MODULE_PARM_DESC(force_subclients, "List of subclient addresses: "
59 "{bus, clientaddr, subclientaddr1, subclientaddr2}");
60
61/* Voltage IN registers 0-6 */
62#define ASB100_REG_IN(nr) (0x20 + (nr))
63#define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2))
64#define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2))
65
66/* FAN IN registers 1-3 */
67#define ASB100_REG_FAN(nr) (0x28 + (nr))
68#define ASB100_REG_FAN_MIN(nr) (0x3b + (nr))
69
70/* TEMPERATURE registers 1-4 */
71static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17};
72static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18};
73static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19};
74
75#define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr])
76#define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr])
77#define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr])
78
79#define ASB100_REG_TEMP2_CONFIG 0x0152
80#define ASB100_REG_TEMP3_CONFIG 0x0252
81
82
83#define ASB100_REG_CONFIG 0x40
84#define ASB100_REG_ALARM1 0x41
85#define ASB100_REG_ALARM2 0x42
86#define ASB100_REG_SMIM1 0x43
87#define ASB100_REG_SMIM2 0x44
88#define ASB100_REG_VID_FANDIV 0x47
89#define ASB100_REG_I2C_ADDR 0x48
90#define ASB100_REG_CHIPID 0x49
91#define ASB100_REG_I2C_SUBADDR 0x4a
92#define ASB100_REG_PIN 0x4b
93#define ASB100_REG_IRQ 0x4c
94#define ASB100_REG_BANK 0x4e
95#define ASB100_REG_CHIPMAN 0x4f
96
97#define ASB100_REG_WCHIPID 0x58
98
99/* bit 7 -> enable, bits 0-3 -> duty cycle */
100#define ASB100_REG_PWM1 0x59
101
102/* CONVERSIONS
103 Rounding and limit checking is only done on the TO_REG variants. */
104
105/* These constants are a guess, consistent w/ w83781d */
106#define ASB100_IN_MIN ( 0)
107#define ASB100_IN_MAX (4080)
108
109/* IN: 1/1000 V (0V to 4.08V)
110 REG: 16mV/bit */
111static u8 IN_TO_REG(unsigned val)
112{
113 unsigned nval = SENSORS_LIMIT(val, ASB100_IN_MIN, ASB100_IN_MAX);
114 return (nval + 8) / 16;
115}
116
117static unsigned IN_FROM_REG(u8 reg)
118{
119 return reg * 16;
120}
121
122static u8 FAN_TO_REG(long rpm, int div)
123{
124 if (rpm == -1)
125 return 0;
126 if (rpm == 0)
127 return 255;
128 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
129 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
130}
131
132static int FAN_FROM_REG(u8 val, int div)
133{
134 return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div);
135}
136
137/* These constants are a guess, consistent w/ w83781d */
138#define ASB100_TEMP_MIN (-128000)
139#define ASB100_TEMP_MAX ( 127000)
140
141/* TEMP: 0.001C/bit (-128C to +127C)
142 REG: 1C/bit, two's complement */
143static u8 TEMP_TO_REG(long temp)
144{
145 int ntemp = SENSORS_LIMIT(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX);
146 ntemp += (ntemp<0 ? -500 : 500);
147 return (u8)(ntemp / 1000);
148}
149
150static int TEMP_FROM_REG(u8 reg)
151{
152 return (s8)reg * 1000;
153}
154
155/* PWM: 0 - 255 per sensors documentation
156 REG: (6.25% duty cycle per bit) */
157static u8 ASB100_PWM_TO_REG(int pwm)
158{
159 pwm = SENSORS_LIMIT(pwm, 0, 255);
160 return (u8)(pwm / 16);
161}
162
163static int ASB100_PWM_FROM_REG(u8 reg)
164{
165 return reg * 16;
166}
167
168#define DIV_FROM_REG(val) (1 << (val))
169
170/* FAN DIV: 1, 2, 4, or 8 (defaults to 2)
171 REG: 0, 1, 2, or 3 (respectively) (defaults to 1) */
172static u8 DIV_TO_REG(long val)
173{
174 return val==8 ? 3 : val==4 ? 2 : val==1 ? 0 : 1;
175}
176
177/* For each registered client, we need to keep some data in memory. That
178 data is pointed to by client->data. The structure itself is
179 dynamically allocated, at the same time the client itself is allocated. */
180struct asb100_data {
181 struct device *hwmon_dev;
182 struct mutex lock;
183
184 struct mutex update_lock;
185 unsigned long last_updated; /* In jiffies */
186
187 /* array of 2 pointers to subclients */
188 struct i2c_client *lm75[2];
189
190 char valid; /* !=0 if following fields are valid */
191 u8 in[7]; /* Register value */
192 u8 in_max[7]; /* Register value */
193 u8 in_min[7]; /* Register value */
194 u8 fan[3]; /* Register value */
195 u8 fan_min[3]; /* Register value */
196 u16 temp[4]; /* Register value (0 and 3 are u8 only) */
197 u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */
198 u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */
199 u8 fan_div[3]; /* Register encoding, right justified */
200 u8 pwm; /* Register encoding */
201 u8 vid; /* Register encoding, combined */
202 u32 alarms; /* Register encoding, combined */
203 u8 vrm;
204};
205
206static int asb100_read_value(struct i2c_client *client, u16 reg);
207static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val);
208
209static int asb100_probe(struct i2c_client *client,
210 const struct i2c_device_id *id);
211static int asb100_detect(struct i2c_client *client,
212 struct i2c_board_info *info);
213static int asb100_remove(struct i2c_client *client);
214static struct asb100_data *asb100_update_device(struct device *dev);
215static void asb100_init_client(struct i2c_client *client);
216
217static const struct i2c_device_id asb100_id[] = {
218 { "asb100", 0 },
219 { }
220};
221MODULE_DEVICE_TABLE(i2c, asb100_id);
222
223static struct i2c_driver asb100_driver = {
224 .class = I2C_CLASS_HWMON,
225 .driver = {
226 .name = "asb100",
227 },
228 .probe = asb100_probe,
229 .remove = asb100_remove,
230 .id_table = asb100_id,
231 .detect = asb100_detect,
232 .address_list = normal_i2c,
233};
234
235/* 7 Voltages */
236#define show_in_reg(reg) \
237static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
238 char *buf) \
239{ \
240 int nr = to_sensor_dev_attr(attr)->index; \
241 struct asb100_data *data = asb100_update_device(dev); \
242 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
243}
244
245show_in_reg(in)
246show_in_reg(in_min)
247show_in_reg(in_max)
248
249#define set_in_reg(REG, reg) \
250static ssize_t set_in_##reg(struct device *dev, struct device_attribute *attr, \
251 const char *buf, size_t count) \
252{ \
253 int nr = to_sensor_dev_attr(attr)->index; \
254 struct i2c_client *client = to_i2c_client(dev); \
255 struct asb100_data *data = i2c_get_clientdata(client); \
256 unsigned long val = simple_strtoul(buf, NULL, 10); \
257 \
258 mutex_lock(&data->update_lock); \
259 data->in_##reg[nr] = IN_TO_REG(val); \
260 asb100_write_value(client, ASB100_REG_IN_##REG(nr), \
261 data->in_##reg[nr]); \
262 mutex_unlock(&data->update_lock); \
263 return count; \
264}
265
266set_in_reg(MIN, min)
267set_in_reg(MAX, max)
268
269#define sysfs_in(offset) \
270static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
271 show_in, NULL, offset); \
272static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
273 show_in_min, set_in_min, offset); \
274static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
275 show_in_max, set_in_max, offset)
276
277sysfs_in(0);
278sysfs_in(1);
279sysfs_in(2);
280sysfs_in(3);
281sysfs_in(4);
282sysfs_in(5);
283sysfs_in(6);
284
285/* 3 Fans */
286static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
287 char *buf)
288{
289 int nr = to_sensor_dev_attr(attr)->index;
290 struct asb100_data *data = asb100_update_device(dev);
291 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
292 DIV_FROM_REG(data->fan_div[nr])));
293}
294
295static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
296 char *buf)
297{
298 int nr = to_sensor_dev_attr(attr)->index;
299 struct asb100_data *data = asb100_update_device(dev);
300 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
301 DIV_FROM_REG(data->fan_div[nr])));
302}
303
304static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
305 char *buf)
306{
307 int nr = to_sensor_dev_attr(attr)->index;
308 struct asb100_data *data = asb100_update_device(dev);
309 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
310}
311
312static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
313 const char *buf, size_t count)
314{
315 int nr = to_sensor_dev_attr(attr)->index;
316 struct i2c_client *client = to_i2c_client(dev);
317 struct asb100_data *data = i2c_get_clientdata(client);
318 u32 val = simple_strtoul(buf, NULL, 10);
319
320 mutex_lock(&data->update_lock);
321 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
322 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
323 mutex_unlock(&data->update_lock);
324 return count;
325}
326
327/* Note: we save and restore the fan minimum here, because its value is
328 determined in part by the fan divisor. This follows the principle of
329 least surprise; the user doesn't expect the fan minimum to change just
330 because the divisor changed. */
331static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
332 const char *buf, size_t count)
333{
334 int nr = to_sensor_dev_attr(attr)->index;
335 struct i2c_client *client = to_i2c_client(dev);
336 struct asb100_data *data = i2c_get_clientdata(client);
337 unsigned long min;
338 unsigned long val = simple_strtoul(buf, NULL, 10);
339 int reg;
340
341 mutex_lock(&data->update_lock);
342
343 min = FAN_FROM_REG(data->fan_min[nr],
344 DIV_FROM_REG(data->fan_div[nr]));
345 data->fan_div[nr] = DIV_TO_REG(val);
346
347 switch (nr) {
348 case 0: /* fan 1 */
349 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
350 reg = (reg & 0xcf) | (data->fan_div[0] << 4);
351 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
352 break;
353
354 case 1: /* fan 2 */
355 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
356 reg = (reg & 0x3f) | (data->fan_div[1] << 6);
357 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
358 break;
359
360 case 2: /* fan 3 */
361 reg = asb100_read_value(client, ASB100_REG_PIN);
362 reg = (reg & 0x3f) | (data->fan_div[2] << 6);
363 asb100_write_value(client, ASB100_REG_PIN, reg);
364 break;
365 }
366
367 data->fan_min[nr] =
368 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
369 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
370
371 mutex_unlock(&data->update_lock);
372
373 return count;
374}
375
376#define sysfs_fan(offset) \
377static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
378 show_fan, NULL, offset - 1); \
379static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
380 show_fan_min, set_fan_min, offset - 1); \
381static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
382 show_fan_div, set_fan_div, offset - 1)
383
384sysfs_fan(1);
385sysfs_fan(2);
386sysfs_fan(3);
387
388/* 4 Temp. Sensors */
389static int sprintf_temp_from_reg(u16 reg, char *buf, int nr)
390{
391 int ret = 0;
392
393 switch (nr) {
394 case 1: case 2:
395 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg));
396 break;
397 case 0: case 3: default:
398 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg));
399 break;
400 }
401 return ret;
402}
403
404#define show_temp_reg(reg) \
405static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
406 char *buf) \
407{ \
408 int nr = to_sensor_dev_attr(attr)->index; \
409 struct asb100_data *data = asb100_update_device(dev); \
410 return sprintf_temp_from_reg(data->reg[nr], buf, nr); \
411}
412
413show_temp_reg(temp);
414show_temp_reg(temp_max);
415show_temp_reg(temp_hyst);
416
417#define set_temp_reg(REG, reg) \
418static ssize_t set_##reg(struct device *dev, struct device_attribute *attr, \
419 const char *buf, size_t count) \
420{ \
421 int nr = to_sensor_dev_attr(attr)->index; \
422 struct i2c_client *client = to_i2c_client(dev); \
423 struct asb100_data *data = i2c_get_clientdata(client); \
424 long val = simple_strtol(buf, NULL, 10); \
425 \
426 mutex_lock(&data->update_lock); \
427 switch (nr) { \
428 case 1: case 2: \
429 data->reg[nr] = LM75_TEMP_TO_REG(val); \
430 break; \
431 case 0: case 3: default: \
432 data->reg[nr] = TEMP_TO_REG(val); \
433 break; \
434 } \
435 asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \
436 data->reg[nr]); \
437 mutex_unlock(&data->update_lock); \
438 return count; \
439}
440
441set_temp_reg(MAX, temp_max);
442set_temp_reg(HYST, temp_hyst);
443
444#define sysfs_temp(num) \
445static SENSOR_DEVICE_ATTR(temp##num##_input, S_IRUGO, \
446 show_temp, NULL, num - 1); \
447static SENSOR_DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \
448 show_temp_max, set_temp_max, num - 1); \
449static SENSOR_DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \
450 show_temp_hyst, set_temp_hyst, num - 1)
451
452sysfs_temp(1);
453sysfs_temp(2);
454sysfs_temp(3);
455sysfs_temp(4);
456
457/* VID */
458static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
459 char *buf)
460{
461 struct asb100_data *data = asb100_update_device(dev);
462 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
463}
464
465static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
466
467/* VRM */
468static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
469 char *buf)
470{
471 struct asb100_data *data = dev_get_drvdata(dev);
472 return sprintf(buf, "%d\n", data->vrm);
473}
474
475static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
476 const char *buf, size_t count)
477{
478 struct asb100_data *data = dev_get_drvdata(dev);
479 data->vrm = simple_strtoul(buf, NULL, 10);
480 return count;
481}
482
483/* Alarms */
484static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
485
486static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
487 char *buf)
488{
489 struct asb100_data *data = asb100_update_device(dev);
490 return sprintf(buf, "%u\n", data->alarms);
491}
492
493static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
494
495static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
496 char *buf)
497{
498 int bitnr = to_sensor_dev_attr(attr)->index;
499 struct asb100_data *data = asb100_update_device(dev);
500 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
501}
502static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
503static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
504static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
505static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
506static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
507static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
508static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
509static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11);
510static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
511static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
512static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13);
513
514/* 1 PWM */
515static ssize_t show_pwm1(struct device *dev, struct device_attribute *attr,
516 char *buf)
517{
518 struct asb100_data *data = asb100_update_device(dev);
519 return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f));
520}
521
522static ssize_t set_pwm1(struct device *dev, struct device_attribute *attr,
523 const char *buf, size_t count)
524{
525 struct i2c_client *client = to_i2c_client(dev);
526 struct asb100_data *data = i2c_get_clientdata(client);
527 unsigned long val = simple_strtoul(buf, NULL, 10);
528
529 mutex_lock(&data->update_lock);
530 data->pwm &= 0x80; /* keep the enable bit */
531 data->pwm |= (0x0f & ASB100_PWM_TO_REG(val));
532 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
533 mutex_unlock(&data->update_lock);
534 return count;
535}
536
537static ssize_t show_pwm_enable1(struct device *dev,
538 struct device_attribute *attr, char *buf)
539{
540 struct asb100_data *data = asb100_update_device(dev);
541 return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0);
542}
543
544static ssize_t set_pwm_enable1(struct device *dev,
545 struct device_attribute *attr, const char *buf, size_t count)
546{
547 struct i2c_client *client = to_i2c_client(dev);
548 struct asb100_data *data = i2c_get_clientdata(client);
549 unsigned long val = simple_strtoul(buf, NULL, 10);
550
551 mutex_lock(&data->update_lock);
552 data->pwm &= 0x0f; /* keep the duty cycle bits */
553 data->pwm |= (val ? 0x80 : 0x00);
554 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
555 mutex_unlock(&data->update_lock);
556 return count;
557}
558
559static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1);
560static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
561 show_pwm_enable1, set_pwm_enable1);
562
563static struct attribute *asb100_attributes[] = {
564 &sensor_dev_attr_in0_input.dev_attr.attr,
565 &sensor_dev_attr_in0_min.dev_attr.attr,
566 &sensor_dev_attr_in0_max.dev_attr.attr,
567 &sensor_dev_attr_in1_input.dev_attr.attr,
568 &sensor_dev_attr_in1_min.dev_attr.attr,
569 &sensor_dev_attr_in1_max.dev_attr.attr,
570 &sensor_dev_attr_in2_input.dev_attr.attr,
571 &sensor_dev_attr_in2_min.dev_attr.attr,
572 &sensor_dev_attr_in2_max.dev_attr.attr,
573 &sensor_dev_attr_in3_input.dev_attr.attr,
574 &sensor_dev_attr_in3_min.dev_attr.attr,
575 &sensor_dev_attr_in3_max.dev_attr.attr,
576 &sensor_dev_attr_in4_input.dev_attr.attr,
577 &sensor_dev_attr_in4_min.dev_attr.attr,
578 &sensor_dev_attr_in4_max.dev_attr.attr,
579 &sensor_dev_attr_in5_input.dev_attr.attr,
580 &sensor_dev_attr_in5_min.dev_attr.attr,
581 &sensor_dev_attr_in5_max.dev_attr.attr,
582 &sensor_dev_attr_in6_input.dev_attr.attr,
583 &sensor_dev_attr_in6_min.dev_attr.attr,
584 &sensor_dev_attr_in6_max.dev_attr.attr,
585
586 &sensor_dev_attr_fan1_input.dev_attr.attr,
587 &sensor_dev_attr_fan1_min.dev_attr.attr,
588 &sensor_dev_attr_fan1_div.dev_attr.attr,
589 &sensor_dev_attr_fan2_input.dev_attr.attr,
590 &sensor_dev_attr_fan2_min.dev_attr.attr,
591 &sensor_dev_attr_fan2_div.dev_attr.attr,
592 &sensor_dev_attr_fan3_input.dev_attr.attr,
593 &sensor_dev_attr_fan3_min.dev_attr.attr,
594 &sensor_dev_attr_fan3_div.dev_attr.attr,
595
596 &sensor_dev_attr_temp1_input.dev_attr.attr,
597 &sensor_dev_attr_temp1_max.dev_attr.attr,
598 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
599 &sensor_dev_attr_temp2_input.dev_attr.attr,
600 &sensor_dev_attr_temp2_max.dev_attr.attr,
601 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
602 &sensor_dev_attr_temp3_input.dev_attr.attr,
603 &sensor_dev_attr_temp3_max.dev_attr.attr,
604 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
605 &sensor_dev_attr_temp4_input.dev_attr.attr,
606 &sensor_dev_attr_temp4_max.dev_attr.attr,
607 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
608
609 &sensor_dev_attr_in0_alarm.dev_attr.attr,
610 &sensor_dev_attr_in1_alarm.dev_attr.attr,
611 &sensor_dev_attr_in2_alarm.dev_attr.attr,
612 &sensor_dev_attr_in3_alarm.dev_attr.attr,
613 &sensor_dev_attr_in4_alarm.dev_attr.attr,
614 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
615 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
616 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
617 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
618 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
619 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
620
621 &dev_attr_cpu0_vid.attr,
622 &dev_attr_vrm.attr,
623 &dev_attr_alarms.attr,
624 &dev_attr_pwm1.attr,
625 &dev_attr_pwm1_enable.attr,
626
627 NULL
628};
629
630static const struct attribute_group asb100_group = {
631 .attrs = asb100_attributes,
632};
633
634static int asb100_detect_subclients(struct i2c_client *client)
635{
636 int i, id, err;
637 int address = client->addr;
638 unsigned short sc_addr[2];
639 struct asb100_data *data = i2c_get_clientdata(client);
640 struct i2c_adapter *adapter = client->adapter;
641
642 id = i2c_adapter_id(adapter);
643
644 if (force_subclients[0] == id && force_subclients[1] == address) {
645 for (i = 2; i <= 3; i++) {
646 if (force_subclients[i] < 0x48 ||
647 force_subclients[i] > 0x4f) {
648 dev_err(&client->dev, "invalid subclient "
649 "address %d; must be 0x48-0x4f\n",
650 force_subclients[i]);
651 err = -ENODEV;
652 goto ERROR_SC_2;
653 }
654 }
655 asb100_write_value(client, ASB100_REG_I2C_SUBADDR,
656 (force_subclients[2] & 0x07) |
657 ((force_subclients[3] & 0x07) << 4));
658 sc_addr[0] = force_subclients[2];
659 sc_addr[1] = force_subclients[3];
660 } else {
661 int val = asb100_read_value(client, ASB100_REG_I2C_SUBADDR);
662 sc_addr[0] = 0x48 + (val & 0x07);
663 sc_addr[1] = 0x48 + ((val >> 4) & 0x07);
664 }
665
666 if (sc_addr[0] == sc_addr[1]) {
667 dev_err(&client->dev, "duplicate addresses 0x%x "
668 "for subclients\n", sc_addr[0]);
669 err = -ENODEV;
670 goto ERROR_SC_2;
671 }
672
673 data->lm75[0] = i2c_new_dummy(adapter, sc_addr[0]);
674 if (!data->lm75[0]) {
675 dev_err(&client->dev, "subclient %d registration "
676 "at address 0x%x failed.\n", 1, sc_addr[0]);
677 err = -ENOMEM;
678 goto ERROR_SC_2;
679 }
680
681 data->lm75[1] = i2c_new_dummy(adapter, sc_addr[1]);
682 if (!data->lm75[1]) {
683 dev_err(&client->dev, "subclient %d registration "
684 "at address 0x%x failed.\n", 2, sc_addr[1]);
685 err = -ENOMEM;
686 goto ERROR_SC_3;
687 }
688
689 return 0;
690
691/* Undo inits in case of errors */
692ERROR_SC_3:
693 i2c_unregister_device(data->lm75[0]);
694ERROR_SC_2:
695 return err;
696}
697
698/* Return 0 if detection is successful, -ENODEV otherwise */
699static int asb100_detect(struct i2c_client *client,
700 struct i2c_board_info *info)
701{
702 struct i2c_adapter *adapter = client->adapter;
703 int val1, val2;
704
705 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
706 pr_debug("detect failed, smbus byte data not supported!\n");
707 return -ENODEV;
708 }
709
710 val1 = i2c_smbus_read_byte_data(client, ASB100_REG_BANK);
711 val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN);
712
713 /* If we're in bank 0 */
714 if ((!(val1 & 0x07)) &&
715 /* Check for ASB100 ID (low byte) */
716 (((!(val1 & 0x80)) && (val2 != 0x94)) ||
717 /* Check for ASB100 ID (high byte ) */
718 ((val1 & 0x80) && (val2 != 0x06)))) {
719 pr_debug("detect failed, bad chip id 0x%02x!\n", val2);
720 return -ENODEV;
721 }
722
723 /* Put it now into bank 0 and Vendor ID High Byte */
724 i2c_smbus_write_byte_data(client, ASB100_REG_BANK,
725 (i2c_smbus_read_byte_data(client, ASB100_REG_BANK) & 0x78)
726 | 0x80);
727
728 /* Determine the chip type. */
729 val1 = i2c_smbus_read_byte_data(client, ASB100_REG_WCHIPID);
730 val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN);
731
732 if (val1 != 0x31 || val2 != 0x06)
733 return -ENODEV;
734
735 strlcpy(info->type, "asb100", I2C_NAME_SIZE);
736
737 return 0;
738}
739
740static int asb100_probe(struct i2c_client *client,
741 const struct i2c_device_id *id)
742{
743 int err;
744 struct asb100_data *data;
745
746 data = kzalloc(sizeof(struct asb100_data), GFP_KERNEL);
747 if (!data) {
748 pr_debug("probe failed, kzalloc failed!\n");
749 err = -ENOMEM;
750 goto ERROR0;
751 }
752
753 i2c_set_clientdata(client, data);
754 mutex_init(&data->lock);
755 mutex_init(&data->update_lock);
756
757 /* Attach secondary lm75 clients */
758 err = asb100_detect_subclients(client);
759 if (err)
760 goto ERROR1;
761
762 /* Initialize the chip */
763 asb100_init_client(client);
764
765 /* A few vars need to be filled upon startup */
766 data->fan_min[0] = asb100_read_value(client, ASB100_REG_FAN_MIN(0));
767 data->fan_min[1] = asb100_read_value(client, ASB100_REG_FAN_MIN(1));
768 data->fan_min[2] = asb100_read_value(client, ASB100_REG_FAN_MIN(2));
769
770 /* Register sysfs hooks */
771 if ((err = sysfs_create_group(&client->dev.kobj, &asb100_group)))
772 goto ERROR3;
773
774 data->hwmon_dev = hwmon_device_register(&client->dev);
775 if (IS_ERR(data->hwmon_dev)) {
776 err = PTR_ERR(data->hwmon_dev);
777 goto ERROR4;
778 }
779
780 return 0;
781
782ERROR4:
783 sysfs_remove_group(&client->dev.kobj, &asb100_group);
784ERROR3:
785 i2c_unregister_device(data->lm75[1]);
786 i2c_unregister_device(data->lm75[0]);
787ERROR1:
788 kfree(data);
789ERROR0:
790 return err;
791}
792
793static int asb100_remove(struct i2c_client *client)
794{
795 struct asb100_data *data = i2c_get_clientdata(client);
796
797 hwmon_device_unregister(data->hwmon_dev);
798 sysfs_remove_group(&client->dev.kobj, &asb100_group);
799
800 i2c_unregister_device(data->lm75[1]);
801 i2c_unregister_device(data->lm75[0]);
802
803 kfree(data);
804
805 return 0;
806}
807
808/* The SMBus locks itself, usually, but nothing may access the chip between
809 bank switches. */
810static int asb100_read_value(struct i2c_client *client, u16 reg)
811{
812 struct asb100_data *data = i2c_get_clientdata(client);
813 struct i2c_client *cl;
814 int res, bank;
815
816 mutex_lock(&data->lock);
817
818 bank = (reg >> 8) & 0x0f;
819 if (bank > 2)
820 /* switch banks */
821 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
822
823 if (bank == 0 || bank > 2) {
824 res = i2c_smbus_read_byte_data(client, reg & 0xff);
825 } else {
826 /* switch to subclient */
827 cl = data->lm75[bank - 1];
828
829 /* convert from ISA to LM75 I2C addresses */
830 switch (reg & 0xff) {
831 case 0x50: /* TEMP */
832 res = swab16(i2c_smbus_read_word_data(cl, 0));
833 break;
834 case 0x52: /* CONFIG */
835 res = i2c_smbus_read_byte_data(cl, 1);
836 break;
837 case 0x53: /* HYST */
838 res = swab16(i2c_smbus_read_word_data(cl, 2));
839 break;
840 case 0x55: /* MAX */
841 default:
842 res = swab16(i2c_smbus_read_word_data(cl, 3));
843 break;
844 }
845 }
846
847 if (bank > 2)
848 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
849
850 mutex_unlock(&data->lock);
851
852 return res;
853}
854
855static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value)
856{
857 struct asb100_data *data = i2c_get_clientdata(client);
858 struct i2c_client *cl;
859 int bank;
860
861 mutex_lock(&data->lock);
862
863 bank = (reg >> 8) & 0x0f;
864 if (bank > 2)
865 /* switch banks */
866 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
867
868 if (bank == 0 || bank > 2) {
869 i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff);
870 } else {
871 /* switch to subclient */
872 cl = data->lm75[bank - 1];
873
874 /* convert from ISA to LM75 I2C addresses */
875 switch (reg & 0xff) {
876 case 0x52: /* CONFIG */
877 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
878 break;
879 case 0x53: /* HYST */
880 i2c_smbus_write_word_data(cl, 2, swab16(value));
881 break;
882 case 0x55: /* MAX */
883 i2c_smbus_write_word_data(cl, 3, swab16(value));
884 break;
885 }
886 }
887
888 if (bank > 2)
889 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
890
891 mutex_unlock(&data->lock);
892}
893
894static void asb100_init_client(struct i2c_client *client)
895{
896 struct asb100_data *data = i2c_get_clientdata(client);
897
898 data->vrm = vid_which_vrm();
899
900 /* Start monitoring */
901 asb100_write_value(client, ASB100_REG_CONFIG,
902 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01);
903}
904
905static struct asb100_data *asb100_update_device(struct device *dev)
906{
907 struct i2c_client *client = to_i2c_client(dev);
908 struct asb100_data *data = i2c_get_clientdata(client);
909 int i;
910
911 mutex_lock(&data->update_lock);
912
913 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
914 || !data->valid) {
915
916 dev_dbg(&client->dev, "starting device update...\n");
917
918 /* 7 voltage inputs */
919 for (i = 0; i < 7; i++) {
920 data->in[i] = asb100_read_value(client,
921 ASB100_REG_IN(i));
922 data->in_min[i] = asb100_read_value(client,
923 ASB100_REG_IN_MIN(i));
924 data->in_max[i] = asb100_read_value(client,
925 ASB100_REG_IN_MAX(i));
926 }
927
928 /* 3 fan inputs */
929 for (i = 0; i < 3; i++) {
930 data->fan[i] = asb100_read_value(client,
931 ASB100_REG_FAN(i));
932 data->fan_min[i] = asb100_read_value(client,
933 ASB100_REG_FAN_MIN(i));
934 }
935
936 /* 4 temperature inputs */
937 for (i = 1; i <= 4; i++) {
938 data->temp[i-1] = asb100_read_value(client,
939 ASB100_REG_TEMP(i));
940 data->temp_max[i-1] = asb100_read_value(client,
941 ASB100_REG_TEMP_MAX(i));
942 data->temp_hyst[i-1] = asb100_read_value(client,
943 ASB100_REG_TEMP_HYST(i));
944 }
945
946 /* VID and fan divisors */
947 i = asb100_read_value(client, ASB100_REG_VID_FANDIV);
948 data->vid = i & 0x0f;
949 data->vid |= (asb100_read_value(client,
950 ASB100_REG_CHIPID) & 0x01) << 4;
951 data->fan_div[0] = (i >> 4) & 0x03;
952 data->fan_div[1] = (i >> 6) & 0x03;
953 data->fan_div[2] = (asb100_read_value(client,
954 ASB100_REG_PIN) >> 6) & 0x03;
955
956 /* PWM */
957 data->pwm = asb100_read_value(client, ASB100_REG_PWM1);
958
959 /* alarms */
960 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) +
961 (asb100_read_value(client, ASB100_REG_ALARM2) << 8);
962
963 data->last_updated = jiffies;
964 data->valid = 1;
965
966 dev_dbg(&client->dev, "... device update complete\n");
967 }
968
969 mutex_unlock(&data->update_lock);
970
971 return data;
972}
973
974static int __init asb100_init(void)
975{
976 return i2c_add_driver(&asb100_driver);
977}
978
979static void __exit asb100_exit(void)
980{
981 i2c_del_driver(&asb100_driver);
982}
983
984MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
985MODULE_DESCRIPTION("ASB100 Bach driver");
986MODULE_LICENSE("GPL");
987
988module_init(asb100_init);
989module_exit(asb100_exit);