2 asb100.c - Part of lm_sensors, Linux kernel modules for hardware
5 Copyright (C) 2004 Mark M. Hoffman <mhoffman@lightlink.com>
7 (derived from w83781d.c)
9 Copyright (C) 1998 - 2003 Frodo Looijaard <frodol@dds.nl>,
10 Philip Edelbrock <phil@netroedge.com>, and
11 Mark Studebaker <mdsxyz123@yahoo.com>
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.
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.
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.
29 This driver supports the hardware sensor chips: Asus ASB100 and
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.
35 Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
36 asb100 7 3 1 4 0x31 0x0694 yes no
39 #include <linux/module.h>
40 #include <linux/slab.h>
41 #include <linux/i2c.h>
42 #include <linux/hwmon.h>
43 #include <linux/hwmon-vid.h>
44 #include <linux/err.h>
45 #include <linux/init.h>
46 #include <linux/jiffies.h>
47 #include <linux/mutex.h>
52 2003-12-29 1.0.0 Ported from lm_sensors project for kernel 2.6
54 #define ASB100_VERSION "1.0.0"
56 /* I2C addresses to scan */
57 static unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END };
59 /* Insmod parameters */
60 I2C_CLIENT_INSMOD_1(asb100);
61 I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
62 "{bus, clientaddr, subclientaddr1, subclientaddr2}");
64 /* Voltage IN registers 0-6 */
65 #define ASB100_REG_IN(nr) (0x20 + (nr))
66 #define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2))
67 #define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2))
69 /* FAN IN registers 1-3 */
70 #define ASB100_REG_FAN(nr) (0x28 + (nr))
71 #define ASB100_REG_FAN_MIN(nr) (0x3b + (nr))
73 /* TEMPERATURE registers 1-4 */
74 static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17};
75 static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18};
76 static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19};
78 #define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr])
79 #define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr])
80 #define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr])
82 #define ASB100_REG_TEMP2_CONFIG 0x0152
83 #define ASB100_REG_TEMP3_CONFIG 0x0252
86 #define ASB100_REG_CONFIG 0x40
87 #define ASB100_REG_ALARM1 0x41
88 #define ASB100_REG_ALARM2 0x42
89 #define ASB100_REG_SMIM1 0x43
90 #define ASB100_REG_SMIM2 0x44
91 #define ASB100_REG_VID_FANDIV 0x47
92 #define ASB100_REG_I2C_ADDR 0x48
93 #define ASB100_REG_CHIPID 0x49
94 #define ASB100_REG_I2C_SUBADDR 0x4a
95 #define ASB100_REG_PIN 0x4b
96 #define ASB100_REG_IRQ 0x4c
97 #define ASB100_REG_BANK 0x4e
98 #define ASB100_REG_CHIPMAN 0x4f
100 #define ASB100_REG_WCHIPID 0x58
102 /* bit 7 -> enable, bits 0-3 -> duty cycle */
103 #define ASB100_REG_PWM1 0x59
106 Rounding and limit checking is only done on the TO_REG variants. */
108 /* These constants are a guess, consistent w/ w83781d */
109 #define ASB100_IN_MIN ( 0)
110 #define ASB100_IN_MAX (4080)
112 /* IN: 1/1000 V (0V to 4.08V)
114 static u8 IN_TO_REG(unsigned val)
116 unsigned nval = SENSORS_LIMIT(val, ASB100_IN_MIN, ASB100_IN_MAX);
117 return (nval + 8) / 16;
120 static unsigned IN_FROM_REG(u8 reg)
125 static u8 FAN_TO_REG(long rpm, int div)
131 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
132 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
135 static int FAN_FROM_REG(u8 val, int div)
137 return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div);
140 /* These constants are a guess, consistent w/ w83781d */
141 #define ASB100_TEMP_MIN (-128000)
142 #define ASB100_TEMP_MAX ( 127000)
144 /* TEMP: 0.001C/bit (-128C to +127C)
145 REG: 1C/bit, two's complement */
146 static u8 TEMP_TO_REG(long temp)
148 int ntemp = SENSORS_LIMIT(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX);
149 ntemp += (ntemp<0 ? -500 : 500);
150 return (u8)(ntemp / 1000);
153 static int TEMP_FROM_REG(u8 reg)
155 return (s8)reg * 1000;
158 /* PWM: 0 - 255 per sensors documentation
159 REG: (6.25% duty cycle per bit) */
160 static u8 ASB100_PWM_TO_REG(int pwm)
162 pwm = SENSORS_LIMIT(pwm, 0, 255);
163 return (u8)(pwm / 16);
166 static int ASB100_PWM_FROM_REG(u8 reg)
171 #define DIV_FROM_REG(val) (1 << (val))
173 /* FAN DIV: 1, 2, 4, or 8 (defaults to 2)
174 REG: 0, 1, 2, or 3 (respectively) (defaults to 1) */
175 static u8 DIV_TO_REG(long val)
177 return val==8 ? 3 : val==4 ? 2 : val==1 ? 0 : 1;
180 /* For each registered client, we need to keep some data in memory. That
181 data is pointed to by client->data. The structure itself is
182 dynamically allocated, at the same time the client itself is allocated. */
184 struct i2c_client client;
185 struct device *hwmon_dev;
189 struct mutex update_lock;
190 unsigned long last_updated; /* In jiffies */
192 /* array of 2 pointers to subclients */
193 struct i2c_client *lm75[2];
195 char valid; /* !=0 if following fields are valid */
196 u8 in[7]; /* Register value */
197 u8 in_max[7]; /* Register value */
198 u8 in_min[7]; /* Register value */
199 u8 fan[3]; /* Register value */
200 u8 fan_min[3]; /* Register value */
201 u16 temp[4]; /* Register value (0 and 3 are u8 only) */
202 u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */
203 u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */
204 u8 fan_div[3]; /* Register encoding, right justified */
205 u8 pwm; /* Register encoding */
206 u8 vid; /* Register encoding, combined */
207 u32 alarms; /* Register encoding, combined */
211 static int asb100_read_value(struct i2c_client *client, u16 reg);
212 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val);
214 static int asb100_attach_adapter(struct i2c_adapter *adapter);
215 static int asb100_detect(struct i2c_adapter *adapter, int address, int kind);
216 static int asb100_detach_client(struct i2c_client *client);
217 static struct asb100_data *asb100_update_device(struct device *dev);
218 static void asb100_init_client(struct i2c_client *client);
220 static struct i2c_driver asb100_driver = {
224 .attach_adapter = asb100_attach_adapter,
225 .detach_client = asb100_detach_client,
229 #define show_in_reg(reg) \
230 static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
232 struct asb100_data *data = asb100_update_device(dev); \
233 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
240 #define set_in_reg(REG, reg) \
241 static ssize_t set_in_##reg(struct device *dev, const char *buf, \
242 size_t count, int nr) \
244 struct i2c_client *client = to_i2c_client(dev); \
245 struct asb100_data *data = i2c_get_clientdata(client); \
246 unsigned long val = simple_strtoul(buf, NULL, 10); \
248 mutex_lock(&data->update_lock); \
249 data->in_##reg[nr] = IN_TO_REG(val); \
250 asb100_write_value(client, ASB100_REG_IN_##REG(nr), \
251 data->in_##reg[nr]); \
252 mutex_unlock(&data->update_lock); \
259 #define sysfs_in(offset) \
261 show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \
263 return show_in(dev, buf, offset); \
265 static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
266 show_in##offset, NULL); \
268 show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
270 return show_in_min(dev, buf, offset); \
273 show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
275 return show_in_max(dev, buf, offset); \
277 static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \
278 const char *buf, size_t count) \
280 return set_in_min(dev, buf, count, offset); \
282 static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \
283 const char *buf, size_t count) \
285 return set_in_max(dev, buf, count, offset); \
287 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
288 show_in##offset##_min, set_in##offset##_min); \
289 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
290 show_in##offset##_max, set_in##offset##_max);
301 static ssize_t show_fan(struct device *dev, char *buf, int nr)
303 struct asb100_data *data = asb100_update_device(dev);
304 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
305 DIV_FROM_REG(data->fan_div[nr])));
308 static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
310 struct asb100_data *data = asb100_update_device(dev);
311 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
312 DIV_FROM_REG(data->fan_div[nr])));
315 static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
317 struct asb100_data *data = asb100_update_device(dev);
318 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
321 static ssize_t set_fan_min(struct device *dev, const char *buf,
322 size_t count, int nr)
324 struct i2c_client *client = to_i2c_client(dev);
325 struct asb100_data *data = i2c_get_clientdata(client);
326 u32 val = simple_strtoul(buf, NULL, 10);
328 mutex_lock(&data->update_lock);
329 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
330 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
331 mutex_unlock(&data->update_lock);
335 /* Note: we save and restore the fan minimum here, because its value is
336 determined in part by the fan divisor. This follows the principle of
337 least surprise; the user doesn't expect the fan minimum to change just
338 because the divisor changed. */
339 static ssize_t set_fan_div(struct device *dev, const char *buf,
340 size_t count, int nr)
342 struct i2c_client *client = to_i2c_client(dev);
343 struct asb100_data *data = i2c_get_clientdata(client);
345 unsigned long val = simple_strtoul(buf, NULL, 10);
348 mutex_lock(&data->update_lock);
350 min = FAN_FROM_REG(data->fan_min[nr],
351 DIV_FROM_REG(data->fan_div[nr]));
352 data->fan_div[nr] = DIV_TO_REG(val);
356 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
357 reg = (reg & 0xcf) | (data->fan_div[0] << 4);
358 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
362 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
363 reg = (reg & 0x3f) | (data->fan_div[1] << 6);
364 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
368 reg = asb100_read_value(client, ASB100_REG_PIN);
369 reg = (reg & 0x3f) | (data->fan_div[2] << 6);
370 asb100_write_value(client, ASB100_REG_PIN, reg);
375 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
376 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
378 mutex_unlock(&data->update_lock);
383 #define sysfs_fan(offset) \
384 static ssize_t show_fan##offset(struct device *dev, struct device_attribute *attr, char *buf) \
386 return show_fan(dev, buf, offset - 1); \
388 static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
390 return show_fan_min(dev, buf, offset - 1); \
392 static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \
394 return show_fan_div(dev, buf, offset - 1); \
396 static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
399 return set_fan_min(dev, buf, count, offset - 1); \
401 static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
404 return set_fan_div(dev, buf, count, offset - 1); \
406 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
407 show_fan##offset, NULL); \
408 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
409 show_fan##offset##_min, set_fan##offset##_min); \
410 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
411 show_fan##offset##_div, set_fan##offset##_div);
417 /* 4 Temp. Sensors */
418 static int sprintf_temp_from_reg(u16 reg, char *buf, int nr)
424 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg));
426 case 0: case 3: default:
427 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg));
433 #define show_temp_reg(reg) \
434 static ssize_t show_##reg(struct device *dev, char *buf, int nr) \
436 struct asb100_data *data = asb100_update_device(dev); \
437 return sprintf_temp_from_reg(data->reg[nr], buf, nr); \
441 show_temp_reg(temp_max);
442 show_temp_reg(temp_hyst);
444 #define set_temp_reg(REG, reg) \
445 static ssize_t set_##reg(struct device *dev, const char *buf, \
446 size_t count, int nr) \
448 struct i2c_client *client = to_i2c_client(dev); \
449 struct asb100_data *data = i2c_get_clientdata(client); \
450 long val = simple_strtol(buf, NULL, 10); \
452 mutex_lock(&data->update_lock); \
455 data->reg[nr] = LM75_TEMP_TO_REG(val); \
457 case 0: case 3: default: \
458 data->reg[nr] = TEMP_TO_REG(val); \
461 asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \
463 mutex_unlock(&data->update_lock); \
467 set_temp_reg(MAX, temp_max);
468 set_temp_reg(HYST, temp_hyst);
470 #define sysfs_temp(num) \
471 static ssize_t show_temp##num(struct device *dev, struct device_attribute *attr, char *buf) \
473 return show_temp(dev, buf, num-1); \
475 static DEVICE_ATTR(temp##num##_input, S_IRUGO, show_temp##num, NULL); \
476 static ssize_t show_temp_max##num(struct device *dev, struct device_attribute *attr, char *buf) \
478 return show_temp_max(dev, buf, num-1); \
480 static ssize_t set_temp_max##num(struct device *dev, struct device_attribute *attr, const char *buf, \
483 return set_temp_max(dev, buf, count, num-1); \
485 static DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \
486 show_temp_max##num, set_temp_max##num); \
487 static ssize_t show_temp_hyst##num(struct device *dev, struct device_attribute *attr, char *buf) \
489 return show_temp_hyst(dev, buf, num-1); \
491 static ssize_t set_temp_hyst##num(struct device *dev, struct device_attribute *attr, const char *buf, \
494 return set_temp_hyst(dev, buf, count, num-1); \
496 static DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \
497 show_temp_hyst##num, set_temp_hyst##num);
505 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
507 struct asb100_data *data = asb100_update_device(dev);
508 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
511 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
514 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
516 struct asb100_data *data = dev_get_drvdata(dev);
517 return sprintf(buf, "%d\n", data->vrm);
520 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
522 struct asb100_data *data = dev_get_drvdata(dev);
523 data->vrm = simple_strtoul(buf, NULL, 10);
528 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
530 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
532 struct asb100_data *data = asb100_update_device(dev);
533 return sprintf(buf, "%u\n", data->alarms);
536 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
539 static ssize_t show_pwm1(struct device *dev, struct device_attribute *attr, char *buf)
541 struct asb100_data *data = asb100_update_device(dev);
542 return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f));
545 static ssize_t set_pwm1(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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);
551 mutex_lock(&data->update_lock);
552 data->pwm &= 0x80; /* keep the enable bit */
553 data->pwm |= (0x0f & ASB100_PWM_TO_REG(val));
554 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
555 mutex_unlock(&data->update_lock);
559 static ssize_t show_pwm_enable1(struct device *dev, struct device_attribute *attr, char *buf)
561 struct asb100_data *data = asb100_update_device(dev);
562 return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0);
565 static ssize_t set_pwm_enable1(struct device *dev, struct device_attribute *attr, const char *buf,
568 struct i2c_client *client = to_i2c_client(dev);
569 struct asb100_data *data = i2c_get_clientdata(client);
570 unsigned long val = simple_strtoul(buf, NULL, 10);
572 mutex_lock(&data->update_lock);
573 data->pwm &= 0x0f; /* keep the duty cycle bits */
574 data->pwm |= (val ? 0x80 : 0x00);
575 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
576 mutex_unlock(&data->update_lock);
580 static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1);
581 static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
582 show_pwm_enable1, set_pwm_enable1);
584 static struct attribute *asb100_attributes[] = {
585 &dev_attr_in0_input.attr,
586 &dev_attr_in0_min.attr,
587 &dev_attr_in0_max.attr,
588 &dev_attr_in1_input.attr,
589 &dev_attr_in1_min.attr,
590 &dev_attr_in1_max.attr,
591 &dev_attr_in2_input.attr,
592 &dev_attr_in2_min.attr,
593 &dev_attr_in2_max.attr,
594 &dev_attr_in3_input.attr,
595 &dev_attr_in3_min.attr,
596 &dev_attr_in3_max.attr,
597 &dev_attr_in4_input.attr,
598 &dev_attr_in4_min.attr,
599 &dev_attr_in4_max.attr,
600 &dev_attr_in5_input.attr,
601 &dev_attr_in5_min.attr,
602 &dev_attr_in5_max.attr,
603 &dev_attr_in6_input.attr,
604 &dev_attr_in6_min.attr,
605 &dev_attr_in6_max.attr,
607 &dev_attr_fan1_input.attr,
608 &dev_attr_fan1_min.attr,
609 &dev_attr_fan1_div.attr,
610 &dev_attr_fan2_input.attr,
611 &dev_attr_fan2_min.attr,
612 &dev_attr_fan2_div.attr,
613 &dev_attr_fan3_input.attr,
614 &dev_attr_fan3_min.attr,
615 &dev_attr_fan3_div.attr,
617 &dev_attr_temp1_input.attr,
618 &dev_attr_temp1_max.attr,
619 &dev_attr_temp1_max_hyst.attr,
620 &dev_attr_temp2_input.attr,
621 &dev_attr_temp2_max.attr,
622 &dev_attr_temp2_max_hyst.attr,
623 &dev_attr_temp3_input.attr,
624 &dev_attr_temp3_max.attr,
625 &dev_attr_temp3_max_hyst.attr,
626 &dev_attr_temp4_input.attr,
627 &dev_attr_temp4_max.attr,
628 &dev_attr_temp4_max_hyst.attr,
630 &dev_attr_cpu0_vid.attr,
632 &dev_attr_alarms.attr,
634 &dev_attr_pwm1_enable.attr,
639 static const struct attribute_group asb100_group = {
640 .attrs = asb100_attributes,
643 /* This function is called when:
644 asb100_driver is inserted (when this module is loaded), for each
646 when a new adapter is inserted (and asb100_driver is still present)
648 static int asb100_attach_adapter(struct i2c_adapter *adapter)
650 if (!(adapter->class & I2C_CLASS_HWMON))
652 return i2c_probe(adapter, &addr_data, asb100_detect);
655 static int asb100_detect_subclients(struct i2c_adapter *adapter, int address,
656 int kind, struct i2c_client *new_client)
659 struct asb100_data *data = i2c_get_clientdata(new_client);
661 data->lm75[0] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
662 if (!(data->lm75[0])) {
667 data->lm75[1] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
668 if (!(data->lm75[1])) {
673 id = i2c_adapter_id(adapter);
675 if (force_subclients[0] == id && force_subclients[1] == address) {
676 for (i = 2; i <= 3; i++) {
677 if (force_subclients[i] < 0x48 ||
678 force_subclients[i] > 0x4f) {
679 dev_err(&new_client->dev, "invalid subclient "
680 "address %d; must be 0x48-0x4f\n",
681 force_subclients[i]);
686 asb100_write_value(new_client, ASB100_REG_I2C_SUBADDR,
687 (force_subclients[2] & 0x07) |
688 ((force_subclients[3] & 0x07) <<4));
689 data->lm75[0]->addr = force_subclients[2];
690 data->lm75[1]->addr = force_subclients[3];
692 int val = asb100_read_value(new_client, ASB100_REG_I2C_SUBADDR);
693 data->lm75[0]->addr = 0x48 + (val & 0x07);
694 data->lm75[1]->addr = 0x48 + ((val >> 4) & 0x07);
697 if(data->lm75[0]->addr == data->lm75[1]->addr) {
698 dev_err(&new_client->dev, "duplicate addresses 0x%x "
699 "for subclients\n", data->lm75[0]->addr);
704 for (i = 0; i <= 1; i++) {
705 i2c_set_clientdata(data->lm75[i], NULL);
706 data->lm75[i]->adapter = adapter;
707 data->lm75[i]->driver = &asb100_driver;
708 data->lm75[i]->flags = 0;
709 strlcpy(data->lm75[i]->name, "asb100 subclient", I2C_NAME_SIZE);
712 if ((err = i2c_attach_client(data->lm75[0]))) {
713 dev_err(&new_client->dev, "subclient %d registration "
714 "at address 0x%x failed.\n", i, data->lm75[0]->addr);
718 if ((err = i2c_attach_client(data->lm75[1]))) {
719 dev_err(&new_client->dev, "subclient %d registration "
720 "at address 0x%x failed.\n", i, data->lm75[1]->addr);
726 /* Undo inits in case of errors */
728 i2c_detach_client(data->lm75[0]);
730 kfree(data->lm75[1]);
732 kfree(data->lm75[0]);
737 static int asb100_detect(struct i2c_adapter *adapter, int address, int kind)
740 struct i2c_client *new_client;
741 struct asb100_data *data;
743 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
744 pr_debug("asb100.o: detect failed, "
745 "smbus byte data not supported!\n");
750 /* OK. For now, we presume we have a valid client. We now create the
751 client structure, even though we cannot fill it completely yet.
752 But it allows us to access asb100_{read,write}_value. */
754 if (!(data = kzalloc(sizeof(struct asb100_data), GFP_KERNEL))) {
755 pr_debug("asb100.o: detect failed, kzalloc failed!\n");
760 new_client = &data->client;
761 mutex_init(&data->lock);
762 i2c_set_clientdata(new_client, data);
763 new_client->addr = address;
764 new_client->adapter = adapter;
765 new_client->driver = &asb100_driver;
766 new_client->flags = 0;
768 /* Now, we do the remaining detection. */
770 /* The chip may be stuck in some other bank than bank 0. This may
771 make reading other information impossible. Specify a force=... or
772 force_*=... parameter, and the chip will be reset to the right
776 int val1 = asb100_read_value(new_client, ASB100_REG_BANK);
777 int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
779 /* If we're in bank 0 */
780 if ( (!(val1 & 0x07)) &&
781 /* Check for ASB100 ID (low byte) */
782 ( ((!(val1 & 0x80)) && (val2 != 0x94)) ||
783 /* Check for ASB100 ID (high byte ) */
784 ((val1 & 0x80) && (val2 != 0x06)) ) ) {
785 pr_debug("asb100.o: detect failed, "
786 "bad chip id 0x%02x!\n", val2);
793 /* We have either had a force parameter, or we have already detected
794 Winbond. Put it now into bank 0 and Vendor ID High Byte */
795 asb100_write_value(new_client, ASB100_REG_BANK,
796 (asb100_read_value(new_client, ASB100_REG_BANK) & 0x78) | 0x80);
798 /* Determine the chip type. */
800 int val1 = asb100_read_value(new_client, ASB100_REG_WCHIPID);
801 int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
803 if ((val1 == 0x31) && (val2 == 0x06))
807 dev_warn(&new_client->dev, "ignoring "
808 "'force' parameter for unknown chip "
809 "at adapter %d, address 0x%02x.\n",
810 i2c_adapter_id(adapter), address);
816 /* Fill in remaining client fields and put it into the global list */
817 strlcpy(new_client->name, "asb100", I2C_NAME_SIZE);
821 mutex_init(&data->update_lock);
823 /* Tell the I2C layer a new client has arrived */
824 if ((err = i2c_attach_client(new_client)))
827 /* Attach secondary lm75 clients */
828 if ((err = asb100_detect_subclients(adapter, address, kind,
832 /* Initialize the chip */
833 asb100_init_client(new_client);
835 /* A few vars need to be filled upon startup */
836 data->fan_min[0] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(0));
837 data->fan_min[1] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(1));
838 data->fan_min[2] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(2));
840 /* Register sysfs hooks */
841 if ((err = sysfs_create_group(&new_client->dev.kobj, &asb100_group)))
844 data->hwmon_dev = hwmon_device_register(&new_client->dev);
845 if (IS_ERR(data->hwmon_dev)) {
846 err = PTR_ERR(data->hwmon_dev);
853 sysfs_remove_group(&new_client->dev.kobj, &asb100_group);
855 i2c_detach_client(data->lm75[1]);
856 i2c_detach_client(data->lm75[0]);
857 kfree(data->lm75[1]);
858 kfree(data->lm75[0]);
860 i2c_detach_client(new_client);
867 static int asb100_detach_client(struct i2c_client *client)
869 struct asb100_data *data = i2c_get_clientdata(client);
874 hwmon_device_unregister(data->hwmon_dev);
875 sysfs_remove_group(&client->dev.kobj, &asb100_group);
878 if ((err = i2c_detach_client(client)))
892 /* The SMBus locks itself, usually, but nothing may access the chip between
894 static int asb100_read_value(struct i2c_client *client, u16 reg)
896 struct asb100_data *data = i2c_get_clientdata(client);
897 struct i2c_client *cl;
900 mutex_lock(&data->lock);
902 bank = (reg >> 8) & 0x0f;
905 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
907 if (bank == 0 || bank > 2) {
908 res = i2c_smbus_read_byte_data(client, reg & 0xff);
910 /* switch to subclient */
911 cl = data->lm75[bank - 1];
913 /* convert from ISA to LM75 I2C addresses */
914 switch (reg & 0xff) {
915 case 0x50: /* TEMP */
916 res = swab16(i2c_smbus_read_word_data (cl, 0));
918 case 0x52: /* CONFIG */
919 res = i2c_smbus_read_byte_data(cl, 1);
921 case 0x53: /* HYST */
922 res = swab16(i2c_smbus_read_word_data (cl, 2));
926 res = swab16(i2c_smbus_read_word_data (cl, 3));
932 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
934 mutex_unlock(&data->lock);
939 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value)
941 struct asb100_data *data = i2c_get_clientdata(client);
942 struct i2c_client *cl;
945 mutex_lock(&data->lock);
947 bank = (reg >> 8) & 0x0f;
950 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
952 if (bank == 0 || bank > 2) {
953 i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff);
955 /* switch to subclient */
956 cl = data->lm75[bank - 1];
958 /* convert from ISA to LM75 I2C addresses */
959 switch (reg & 0xff) {
960 case 0x52: /* CONFIG */
961 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
963 case 0x53: /* HYST */
964 i2c_smbus_write_word_data(cl, 2, swab16(value));
967 i2c_smbus_write_word_data(cl, 3, swab16(value));
973 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
975 mutex_unlock(&data->lock);
978 static void asb100_init_client(struct i2c_client *client)
980 struct asb100_data *data = i2c_get_clientdata(client);
983 vid = asb100_read_value(client, ASB100_REG_VID_FANDIV) & 0x0f;
984 vid |= (asb100_read_value(client, ASB100_REG_CHIPID) & 0x01) << 4;
985 data->vrm = vid_which_vrm();
986 vid = vid_from_reg(vid, data->vrm);
988 /* Start monitoring */
989 asb100_write_value(client, ASB100_REG_CONFIG,
990 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01);
993 static struct asb100_data *asb100_update_device(struct device *dev)
995 struct i2c_client *client = to_i2c_client(dev);
996 struct asb100_data *data = i2c_get_clientdata(client);
999 mutex_lock(&data->update_lock);
1001 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1004 dev_dbg(&client->dev, "starting device update...\n");
1006 /* 7 voltage inputs */
1007 for (i = 0; i < 7; i++) {
1008 data->in[i] = asb100_read_value(client,
1010 data->in_min[i] = asb100_read_value(client,
1011 ASB100_REG_IN_MIN(i));
1012 data->in_max[i] = asb100_read_value(client,
1013 ASB100_REG_IN_MAX(i));
1017 for (i = 0; i < 3; i++) {
1018 data->fan[i] = asb100_read_value(client,
1020 data->fan_min[i] = asb100_read_value(client,
1021 ASB100_REG_FAN_MIN(i));
1024 /* 4 temperature inputs */
1025 for (i = 1; i <= 4; i++) {
1026 data->temp[i-1] = asb100_read_value(client,
1027 ASB100_REG_TEMP(i));
1028 data->temp_max[i-1] = asb100_read_value(client,
1029 ASB100_REG_TEMP_MAX(i));
1030 data->temp_hyst[i-1] = asb100_read_value(client,
1031 ASB100_REG_TEMP_HYST(i));
1034 /* VID and fan divisors */
1035 i = asb100_read_value(client, ASB100_REG_VID_FANDIV);
1036 data->vid = i & 0x0f;
1037 data->vid |= (asb100_read_value(client,
1038 ASB100_REG_CHIPID) & 0x01) << 4;
1039 data->fan_div[0] = (i >> 4) & 0x03;
1040 data->fan_div[1] = (i >> 6) & 0x03;
1041 data->fan_div[2] = (asb100_read_value(client,
1042 ASB100_REG_PIN) >> 6) & 0x03;
1045 data->pwm = asb100_read_value(client, ASB100_REG_PWM1);
1048 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) +
1049 (asb100_read_value(client, ASB100_REG_ALARM2) << 8);
1051 data->last_updated = jiffies;
1054 dev_dbg(&client->dev, "... device update complete\n");
1057 mutex_unlock(&data->update_lock);
1062 static int __init asb100_init(void)
1064 return i2c_add_driver(&asb100_driver);
1067 static void __exit asb100_exit(void)
1069 i2c_del_driver(&asb100_driver);
1072 MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
1073 MODULE_DESCRIPTION("ASB100 Bach driver");
1074 MODULE_LICENSE("GPL");
1076 module_init(asb100_init);
1077 module_exit(asb100_exit);