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>
50 /* I2C addresses to scan */
51 static unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END };
53 /* Insmod parameters */
54 I2C_CLIENT_INSMOD_1(asb100);
55 I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
56 "{bus, clientaddr, subclientaddr1, subclientaddr2}");
58 /* Voltage IN registers 0-6 */
59 #define ASB100_REG_IN(nr) (0x20 + (nr))
60 #define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2))
61 #define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2))
63 /* FAN IN registers 1-3 */
64 #define ASB100_REG_FAN(nr) (0x28 + (nr))
65 #define ASB100_REG_FAN_MIN(nr) (0x3b + (nr))
67 /* TEMPERATURE registers 1-4 */
68 static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17};
69 static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18};
70 static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19};
72 #define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr])
73 #define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr])
74 #define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr])
76 #define ASB100_REG_TEMP2_CONFIG 0x0152
77 #define ASB100_REG_TEMP3_CONFIG 0x0252
80 #define ASB100_REG_CONFIG 0x40
81 #define ASB100_REG_ALARM1 0x41
82 #define ASB100_REG_ALARM2 0x42
83 #define ASB100_REG_SMIM1 0x43
84 #define ASB100_REG_SMIM2 0x44
85 #define ASB100_REG_VID_FANDIV 0x47
86 #define ASB100_REG_I2C_ADDR 0x48
87 #define ASB100_REG_CHIPID 0x49
88 #define ASB100_REG_I2C_SUBADDR 0x4a
89 #define ASB100_REG_PIN 0x4b
90 #define ASB100_REG_IRQ 0x4c
91 #define ASB100_REG_BANK 0x4e
92 #define ASB100_REG_CHIPMAN 0x4f
94 #define ASB100_REG_WCHIPID 0x58
96 /* bit 7 -> enable, bits 0-3 -> duty cycle */
97 #define ASB100_REG_PWM1 0x59
100 Rounding and limit checking is only done on the TO_REG variants. */
102 /* These constants are a guess, consistent w/ w83781d */
103 #define ASB100_IN_MIN ( 0)
104 #define ASB100_IN_MAX (4080)
106 /* IN: 1/1000 V (0V to 4.08V)
108 static u8 IN_TO_REG(unsigned val)
110 unsigned nval = SENSORS_LIMIT(val, ASB100_IN_MIN, ASB100_IN_MAX);
111 return (nval + 8) / 16;
114 static unsigned IN_FROM_REG(u8 reg)
119 static u8 FAN_TO_REG(long rpm, int div)
125 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
126 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
129 static int FAN_FROM_REG(u8 val, int div)
131 return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div);
134 /* These constants are a guess, consistent w/ w83781d */
135 #define ASB100_TEMP_MIN (-128000)
136 #define ASB100_TEMP_MAX ( 127000)
138 /* TEMP: 0.001C/bit (-128C to +127C)
139 REG: 1C/bit, two's complement */
140 static u8 TEMP_TO_REG(long temp)
142 int ntemp = SENSORS_LIMIT(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX);
143 ntemp += (ntemp<0 ? -500 : 500);
144 return (u8)(ntemp / 1000);
147 static int TEMP_FROM_REG(u8 reg)
149 return (s8)reg * 1000;
152 /* PWM: 0 - 255 per sensors documentation
153 REG: (6.25% duty cycle per bit) */
154 static u8 ASB100_PWM_TO_REG(int pwm)
156 pwm = SENSORS_LIMIT(pwm, 0, 255);
157 return (u8)(pwm / 16);
160 static int ASB100_PWM_FROM_REG(u8 reg)
165 #define DIV_FROM_REG(val) (1 << (val))
167 /* FAN DIV: 1, 2, 4, or 8 (defaults to 2)
168 REG: 0, 1, 2, or 3 (respectively) (defaults to 1) */
169 static u8 DIV_TO_REG(long val)
171 return val==8 ? 3 : val==4 ? 2 : val==1 ? 0 : 1;
174 /* For each registered client, we need to keep some data in memory. That
175 data is pointed to by client->data. The structure itself is
176 dynamically allocated, at the same time the client itself is allocated. */
178 struct i2c_client client;
179 struct device *hwmon_dev;
183 struct mutex update_lock;
184 unsigned long last_updated; /* In jiffies */
186 /* array of 2 pointers to subclients */
187 struct i2c_client *lm75[2];
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 */
205 static int asb100_read_value(struct i2c_client *client, u16 reg);
206 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val);
208 static int asb100_attach_adapter(struct i2c_adapter *adapter);
209 static int asb100_detect(struct i2c_adapter *adapter, int address, int kind);
210 static int asb100_detach_client(struct i2c_client *client);
211 static struct asb100_data *asb100_update_device(struct device *dev);
212 static void asb100_init_client(struct i2c_client *client);
214 static struct i2c_driver asb100_driver = {
218 .attach_adapter = asb100_attach_adapter,
219 .detach_client = asb100_detach_client,
223 #define show_in_reg(reg) \
224 static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
226 struct asb100_data *data = asb100_update_device(dev); \
227 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
234 #define set_in_reg(REG, reg) \
235 static ssize_t set_in_##reg(struct device *dev, const char *buf, \
236 size_t count, int nr) \
238 struct i2c_client *client = to_i2c_client(dev); \
239 struct asb100_data *data = i2c_get_clientdata(client); \
240 unsigned long val = simple_strtoul(buf, NULL, 10); \
242 mutex_lock(&data->update_lock); \
243 data->in_##reg[nr] = IN_TO_REG(val); \
244 asb100_write_value(client, ASB100_REG_IN_##REG(nr), \
245 data->in_##reg[nr]); \
246 mutex_unlock(&data->update_lock); \
253 #define sysfs_in(offset) \
255 show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \
257 return show_in(dev, buf, offset); \
259 static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
260 show_in##offset, NULL); \
262 show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
264 return show_in_min(dev, buf, offset); \
267 show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
269 return show_in_max(dev, buf, offset); \
271 static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \
272 const char *buf, size_t count) \
274 return set_in_min(dev, buf, count, offset); \
276 static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \
277 const char *buf, size_t count) \
279 return set_in_max(dev, buf, count, offset); \
281 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
282 show_in##offset##_min, set_in##offset##_min); \
283 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
284 show_in##offset##_max, set_in##offset##_max);
295 static ssize_t show_fan(struct device *dev, char *buf, int nr)
297 struct asb100_data *data = asb100_update_device(dev);
298 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
299 DIV_FROM_REG(data->fan_div[nr])));
302 static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
304 struct asb100_data *data = asb100_update_device(dev);
305 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
306 DIV_FROM_REG(data->fan_div[nr])));
309 static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
311 struct asb100_data *data = asb100_update_device(dev);
312 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
315 static ssize_t set_fan_min(struct device *dev, const char *buf,
316 size_t count, int nr)
318 struct i2c_client *client = to_i2c_client(dev);
319 struct asb100_data *data = i2c_get_clientdata(client);
320 u32 val = simple_strtoul(buf, NULL, 10);
322 mutex_lock(&data->update_lock);
323 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
324 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
325 mutex_unlock(&data->update_lock);
329 /* Note: we save and restore the fan minimum here, because its value is
330 determined in part by the fan divisor. This follows the principle of
331 least surprise; the user doesn't expect the fan minimum to change just
332 because the divisor changed. */
333 static ssize_t set_fan_div(struct device *dev, const char *buf,
334 size_t count, int nr)
336 struct i2c_client *client = to_i2c_client(dev);
337 struct asb100_data *data = i2c_get_clientdata(client);
339 unsigned long val = simple_strtoul(buf, NULL, 10);
342 mutex_lock(&data->update_lock);
344 min = FAN_FROM_REG(data->fan_min[nr],
345 DIV_FROM_REG(data->fan_div[nr]));
346 data->fan_div[nr] = DIV_TO_REG(val);
350 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
351 reg = (reg & 0xcf) | (data->fan_div[0] << 4);
352 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
356 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
357 reg = (reg & 0x3f) | (data->fan_div[1] << 6);
358 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
362 reg = asb100_read_value(client, ASB100_REG_PIN);
363 reg = (reg & 0x3f) | (data->fan_div[2] << 6);
364 asb100_write_value(client, ASB100_REG_PIN, reg);
369 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
370 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
372 mutex_unlock(&data->update_lock);
377 #define sysfs_fan(offset) \
378 static ssize_t show_fan##offset(struct device *dev, struct device_attribute *attr, char *buf) \
380 return show_fan(dev, buf, offset - 1); \
382 static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
384 return show_fan_min(dev, buf, offset - 1); \
386 static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \
388 return show_fan_div(dev, buf, offset - 1); \
390 static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
393 return set_fan_min(dev, buf, count, offset - 1); \
395 static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
398 return set_fan_div(dev, buf, count, offset - 1); \
400 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
401 show_fan##offset, NULL); \
402 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
403 show_fan##offset##_min, set_fan##offset##_min); \
404 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
405 show_fan##offset##_div, set_fan##offset##_div);
411 /* 4 Temp. Sensors */
412 static int sprintf_temp_from_reg(u16 reg, char *buf, int nr)
418 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg));
420 case 0: case 3: default:
421 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg));
427 #define show_temp_reg(reg) \
428 static ssize_t show_##reg(struct device *dev, char *buf, int nr) \
430 struct asb100_data *data = asb100_update_device(dev); \
431 return sprintf_temp_from_reg(data->reg[nr], buf, nr); \
435 show_temp_reg(temp_max);
436 show_temp_reg(temp_hyst);
438 #define set_temp_reg(REG, reg) \
439 static ssize_t set_##reg(struct device *dev, const char *buf, \
440 size_t count, int nr) \
442 struct i2c_client *client = to_i2c_client(dev); \
443 struct asb100_data *data = i2c_get_clientdata(client); \
444 long val = simple_strtol(buf, NULL, 10); \
446 mutex_lock(&data->update_lock); \
449 data->reg[nr] = LM75_TEMP_TO_REG(val); \
451 case 0: case 3: default: \
452 data->reg[nr] = TEMP_TO_REG(val); \
455 asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \
457 mutex_unlock(&data->update_lock); \
461 set_temp_reg(MAX, temp_max);
462 set_temp_reg(HYST, temp_hyst);
464 #define sysfs_temp(num) \
465 static ssize_t show_temp##num(struct device *dev, struct device_attribute *attr, char *buf) \
467 return show_temp(dev, buf, num-1); \
469 static DEVICE_ATTR(temp##num##_input, S_IRUGO, show_temp##num, NULL); \
470 static ssize_t show_temp_max##num(struct device *dev, struct device_attribute *attr, char *buf) \
472 return show_temp_max(dev, buf, num-1); \
474 static ssize_t set_temp_max##num(struct device *dev, struct device_attribute *attr, const char *buf, \
477 return set_temp_max(dev, buf, count, num-1); \
479 static DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \
480 show_temp_max##num, set_temp_max##num); \
481 static ssize_t show_temp_hyst##num(struct device *dev, struct device_attribute *attr, char *buf) \
483 return show_temp_hyst(dev, buf, num-1); \
485 static ssize_t set_temp_hyst##num(struct device *dev, struct device_attribute *attr, const char *buf, \
488 return set_temp_hyst(dev, buf, count, num-1); \
490 static DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \
491 show_temp_hyst##num, set_temp_hyst##num);
499 static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
502 struct asb100_data *data = asb100_update_device(dev);
503 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
506 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
509 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
512 struct asb100_data *data = dev_get_drvdata(dev);
513 return sprintf(buf, "%d\n", data->vrm);
516 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
517 const char *buf, size_t count)
519 struct asb100_data *data = dev_get_drvdata(dev);
520 data->vrm = simple_strtoul(buf, NULL, 10);
525 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
527 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
530 struct asb100_data *data = asb100_update_device(dev);
531 return sprintf(buf, "%u\n", data->alarms);
534 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
537 static ssize_t show_pwm1(struct device *dev, struct device_attribute *attr,
540 struct asb100_data *data = asb100_update_device(dev);
541 return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f));
544 static ssize_t set_pwm1(struct device *dev, struct device_attribute *attr,
545 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,
560 struct device_attribute *attr, char *buf)
562 struct asb100_data *data = asb100_update_device(dev);
563 return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0);
566 static ssize_t set_pwm_enable1(struct device *dev,
567 struct device_attribute *attr, const char *buf, size_t count)
569 struct i2c_client *client = to_i2c_client(dev);
570 struct asb100_data *data = i2c_get_clientdata(client);
571 unsigned long val = simple_strtoul(buf, NULL, 10);
573 mutex_lock(&data->update_lock);
574 data->pwm &= 0x0f; /* keep the duty cycle bits */
575 data->pwm |= (val ? 0x80 : 0x00);
576 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
577 mutex_unlock(&data->update_lock);
581 static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1);
582 static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
583 show_pwm_enable1, set_pwm_enable1);
585 static struct attribute *asb100_attributes[] = {
586 &dev_attr_in0_input.attr,
587 &dev_attr_in0_min.attr,
588 &dev_attr_in0_max.attr,
589 &dev_attr_in1_input.attr,
590 &dev_attr_in1_min.attr,
591 &dev_attr_in1_max.attr,
592 &dev_attr_in2_input.attr,
593 &dev_attr_in2_min.attr,
594 &dev_attr_in2_max.attr,
595 &dev_attr_in3_input.attr,
596 &dev_attr_in3_min.attr,
597 &dev_attr_in3_max.attr,
598 &dev_attr_in4_input.attr,
599 &dev_attr_in4_min.attr,
600 &dev_attr_in4_max.attr,
601 &dev_attr_in5_input.attr,
602 &dev_attr_in5_min.attr,
603 &dev_attr_in5_max.attr,
604 &dev_attr_in6_input.attr,
605 &dev_attr_in6_min.attr,
606 &dev_attr_in6_max.attr,
608 &dev_attr_fan1_input.attr,
609 &dev_attr_fan1_min.attr,
610 &dev_attr_fan1_div.attr,
611 &dev_attr_fan2_input.attr,
612 &dev_attr_fan2_min.attr,
613 &dev_attr_fan2_div.attr,
614 &dev_attr_fan3_input.attr,
615 &dev_attr_fan3_min.attr,
616 &dev_attr_fan3_div.attr,
618 &dev_attr_temp1_input.attr,
619 &dev_attr_temp1_max.attr,
620 &dev_attr_temp1_max_hyst.attr,
621 &dev_attr_temp2_input.attr,
622 &dev_attr_temp2_max.attr,
623 &dev_attr_temp2_max_hyst.attr,
624 &dev_attr_temp3_input.attr,
625 &dev_attr_temp3_max.attr,
626 &dev_attr_temp3_max_hyst.attr,
627 &dev_attr_temp4_input.attr,
628 &dev_attr_temp4_max.attr,
629 &dev_attr_temp4_max_hyst.attr,
631 &dev_attr_cpu0_vid.attr,
633 &dev_attr_alarms.attr,
635 &dev_attr_pwm1_enable.attr,
640 static const struct attribute_group asb100_group = {
641 .attrs = asb100_attributes,
644 /* This function is called when:
645 asb100_driver is inserted (when this module is loaded), for each
647 when a new adapter is inserted (and asb100_driver is still present)
649 static int asb100_attach_adapter(struct i2c_adapter *adapter)
651 if (!(adapter->class & I2C_CLASS_HWMON))
653 return i2c_probe(adapter, &addr_data, asb100_detect);
656 static int asb100_detect_subclients(struct i2c_adapter *adapter, int address,
657 int kind, struct i2c_client *client)
660 struct asb100_data *data = i2c_get_clientdata(client);
662 data->lm75[0] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
663 if (!(data->lm75[0])) {
668 data->lm75[1] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
669 if (!(data->lm75[1])) {
674 id = i2c_adapter_id(adapter);
676 if (force_subclients[0] == id && force_subclients[1] == address) {
677 for (i = 2; i <= 3; i++) {
678 if (force_subclients[i] < 0x48 ||
679 force_subclients[i] > 0x4f) {
680 dev_err(&client->dev, "invalid subclient "
681 "address %d; must be 0x48-0x4f\n",
682 force_subclients[i]);
687 asb100_write_value(client, ASB100_REG_I2C_SUBADDR,
688 (force_subclients[2] & 0x07) |
689 ((force_subclients[3] & 0x07) << 4));
690 data->lm75[0]->addr = force_subclients[2];
691 data->lm75[1]->addr = force_subclients[3];
693 int val = asb100_read_value(client, ASB100_REG_I2C_SUBADDR);
694 data->lm75[0]->addr = 0x48 + (val & 0x07);
695 data->lm75[1]->addr = 0x48 + ((val >> 4) & 0x07);
698 if (data->lm75[0]->addr == data->lm75[1]->addr) {
699 dev_err(&client->dev, "duplicate addresses 0x%x "
700 "for subclients\n", data->lm75[0]->addr);
705 for (i = 0; i <= 1; i++) {
706 i2c_set_clientdata(data->lm75[i], NULL);
707 data->lm75[i]->adapter = adapter;
708 data->lm75[i]->driver = &asb100_driver;
709 strlcpy(data->lm75[i]->name, "asb100 subclient", I2C_NAME_SIZE);
712 if ((err = i2c_attach_client(data->lm75[0]))) {
713 dev_err(&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(&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 *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 client = &data->client;
761 mutex_init(&data->lock);
762 i2c_set_clientdata(client, data);
763 client->addr = address;
764 client->adapter = adapter;
765 client->driver = &asb100_driver;
767 /* Now, we do the remaining detection. */
769 /* The chip may be stuck in some other bank than bank 0. This may
770 make reading other information impossible. Specify a force=... or
771 force_*=... parameter, and the chip will be reset to the right
775 int val1 = asb100_read_value(client, ASB100_REG_BANK);
776 int val2 = asb100_read_value(client, ASB100_REG_CHIPMAN);
778 /* If we're in bank 0 */
779 if ((!(val1 & 0x07)) &&
780 /* Check for ASB100 ID (low byte) */
781 (((!(val1 & 0x80)) && (val2 != 0x94)) ||
782 /* Check for ASB100 ID (high byte ) */
783 ((val1 & 0x80) && (val2 != 0x06)))) {
784 pr_debug("asb100.o: detect failed, "
785 "bad chip id 0x%02x!\n", val2);
792 /* We have either had a force parameter, or we have already detected
793 Winbond. Put it now into bank 0 and Vendor ID High Byte */
794 asb100_write_value(client, ASB100_REG_BANK,
795 (asb100_read_value(client, ASB100_REG_BANK) & 0x78) | 0x80);
797 /* Determine the chip type. */
799 int val1 = asb100_read_value(client, ASB100_REG_WCHIPID);
800 int val2 = asb100_read_value(client, ASB100_REG_CHIPMAN);
802 if ((val1 == 0x31) && (val2 == 0x06))
806 dev_warn(&client->dev, "ignoring "
807 "'force' parameter for unknown chip "
808 "at adapter %d, address 0x%02x.\n",
809 i2c_adapter_id(adapter), address);
815 /* Fill in remaining client fields and put it into the global list */
816 strlcpy(client->name, "asb100", I2C_NAME_SIZE);
818 mutex_init(&data->update_lock);
820 /* Tell the I2C layer a new client has arrived */
821 if ((err = i2c_attach_client(client)))
824 /* Attach secondary lm75 clients */
825 if ((err = asb100_detect_subclients(adapter, address, kind,
829 /* Initialize the chip */
830 asb100_init_client(client);
832 /* A few vars need to be filled upon startup */
833 data->fan_min[0] = asb100_read_value(client, ASB100_REG_FAN_MIN(0));
834 data->fan_min[1] = asb100_read_value(client, ASB100_REG_FAN_MIN(1));
835 data->fan_min[2] = asb100_read_value(client, ASB100_REG_FAN_MIN(2));
837 /* Register sysfs hooks */
838 if ((err = sysfs_create_group(&client->dev.kobj, &asb100_group)))
841 data->hwmon_dev = hwmon_device_register(&client->dev);
842 if (IS_ERR(data->hwmon_dev)) {
843 err = PTR_ERR(data->hwmon_dev);
850 sysfs_remove_group(&client->dev.kobj, &asb100_group);
852 i2c_detach_client(data->lm75[1]);
853 i2c_detach_client(data->lm75[0]);
854 kfree(data->lm75[1]);
855 kfree(data->lm75[0]);
857 i2c_detach_client(client);
864 static int asb100_detach_client(struct i2c_client *client)
866 struct asb100_data *data = i2c_get_clientdata(client);
871 hwmon_device_unregister(data->hwmon_dev);
872 sysfs_remove_group(&client->dev.kobj, &asb100_group);
875 if ((err = i2c_detach_client(client)))
889 /* The SMBus locks itself, usually, but nothing may access the chip between
891 static int asb100_read_value(struct i2c_client *client, u16 reg)
893 struct asb100_data *data = i2c_get_clientdata(client);
894 struct i2c_client *cl;
897 mutex_lock(&data->lock);
899 bank = (reg >> 8) & 0x0f;
902 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
904 if (bank == 0 || bank > 2) {
905 res = i2c_smbus_read_byte_data(client, reg & 0xff);
907 /* switch to subclient */
908 cl = data->lm75[bank - 1];
910 /* convert from ISA to LM75 I2C addresses */
911 switch (reg & 0xff) {
912 case 0x50: /* TEMP */
913 res = swab16(i2c_smbus_read_word_data(cl, 0));
915 case 0x52: /* CONFIG */
916 res = i2c_smbus_read_byte_data(cl, 1);
918 case 0x53: /* HYST */
919 res = swab16(i2c_smbus_read_word_data(cl, 2));
923 res = swab16(i2c_smbus_read_word_data(cl, 3));
929 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
931 mutex_unlock(&data->lock);
936 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value)
938 struct asb100_data *data = i2c_get_clientdata(client);
939 struct i2c_client *cl;
942 mutex_lock(&data->lock);
944 bank = (reg >> 8) & 0x0f;
947 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
949 if (bank == 0 || bank > 2) {
950 i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff);
952 /* switch to subclient */
953 cl = data->lm75[bank - 1];
955 /* convert from ISA to LM75 I2C addresses */
956 switch (reg & 0xff) {
957 case 0x52: /* CONFIG */
958 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
960 case 0x53: /* HYST */
961 i2c_smbus_write_word_data(cl, 2, swab16(value));
964 i2c_smbus_write_word_data(cl, 3, swab16(value));
970 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
972 mutex_unlock(&data->lock);
975 static void asb100_init_client(struct i2c_client *client)
977 struct asb100_data *data = i2c_get_clientdata(client);
980 vid = asb100_read_value(client, ASB100_REG_VID_FANDIV) & 0x0f;
981 vid |= (asb100_read_value(client, ASB100_REG_CHIPID) & 0x01) << 4;
982 data->vrm = vid_which_vrm();
983 vid = vid_from_reg(vid, data->vrm);
985 /* Start monitoring */
986 asb100_write_value(client, ASB100_REG_CONFIG,
987 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01);
990 static struct asb100_data *asb100_update_device(struct device *dev)
992 struct i2c_client *client = to_i2c_client(dev);
993 struct asb100_data *data = i2c_get_clientdata(client);
996 mutex_lock(&data->update_lock);
998 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1001 dev_dbg(&client->dev, "starting device update...\n");
1003 /* 7 voltage inputs */
1004 for (i = 0; i < 7; i++) {
1005 data->in[i] = asb100_read_value(client,
1007 data->in_min[i] = asb100_read_value(client,
1008 ASB100_REG_IN_MIN(i));
1009 data->in_max[i] = asb100_read_value(client,
1010 ASB100_REG_IN_MAX(i));
1014 for (i = 0; i < 3; i++) {
1015 data->fan[i] = asb100_read_value(client,
1017 data->fan_min[i] = asb100_read_value(client,
1018 ASB100_REG_FAN_MIN(i));
1021 /* 4 temperature inputs */
1022 for (i = 1; i <= 4; i++) {
1023 data->temp[i-1] = asb100_read_value(client,
1024 ASB100_REG_TEMP(i));
1025 data->temp_max[i-1] = asb100_read_value(client,
1026 ASB100_REG_TEMP_MAX(i));
1027 data->temp_hyst[i-1] = asb100_read_value(client,
1028 ASB100_REG_TEMP_HYST(i));
1031 /* VID and fan divisors */
1032 i = asb100_read_value(client, ASB100_REG_VID_FANDIV);
1033 data->vid = i & 0x0f;
1034 data->vid |= (asb100_read_value(client,
1035 ASB100_REG_CHIPID) & 0x01) << 4;
1036 data->fan_div[0] = (i >> 4) & 0x03;
1037 data->fan_div[1] = (i >> 6) & 0x03;
1038 data->fan_div[2] = (asb100_read_value(client,
1039 ASB100_REG_PIN) >> 6) & 0x03;
1042 data->pwm = asb100_read_value(client, ASB100_REG_PWM1);
1045 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) +
1046 (asb100_read_value(client, ASB100_REG_ALARM2) << 8);
1048 data->last_updated = jiffies;
1051 dev_dbg(&client->dev, "... device update complete\n");
1054 mutex_unlock(&data->update_lock);
1059 static int __init asb100_init(void)
1061 return i2c_add_driver(&asb100_driver);
1064 static void __exit asb100_exit(void)
1066 i2c_del_driver(&asb100_driver);
1069 MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
1070 MODULE_DESCRIPTION("ASB100 Bach driver");
1071 MODULE_LICENSE("GPL");
1073 module_init(asb100_init);
1074 module_exit(asb100_exit);