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>
51 2003-12-29 1.0.0 Ported from lm_sensors project for kernel 2.6
53 #define ASB100_VERSION "1.0.0"
55 /* I2C addresses to scan */
56 static unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END };
58 /* Insmod parameters */
59 I2C_CLIENT_INSMOD_1(asb100);
60 I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
61 "{bus, clientaddr, subclientaddr1, subclientaddr2}");
63 /* Voltage IN registers 0-6 */
64 #define ASB100_REG_IN(nr) (0x20 + (nr))
65 #define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2))
66 #define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2))
68 /* FAN IN registers 1-3 */
69 #define ASB100_REG_FAN(nr) (0x28 + (nr))
70 #define ASB100_REG_FAN_MIN(nr) (0x3b + (nr))
72 /* TEMPERATURE registers 1-4 */
73 static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17};
74 static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18};
75 static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19};
77 #define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr])
78 #define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr])
79 #define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr])
81 #define ASB100_REG_TEMP2_CONFIG 0x0152
82 #define ASB100_REG_TEMP3_CONFIG 0x0252
85 #define ASB100_REG_CONFIG 0x40
86 #define ASB100_REG_ALARM1 0x41
87 #define ASB100_REG_ALARM2 0x42
88 #define ASB100_REG_SMIM1 0x43
89 #define ASB100_REG_SMIM2 0x44
90 #define ASB100_REG_VID_FANDIV 0x47
91 #define ASB100_REG_I2C_ADDR 0x48
92 #define ASB100_REG_CHIPID 0x49
93 #define ASB100_REG_I2C_SUBADDR 0x4a
94 #define ASB100_REG_PIN 0x4b
95 #define ASB100_REG_IRQ 0x4c
96 #define ASB100_REG_BANK 0x4e
97 #define ASB100_REG_CHIPMAN 0x4f
99 #define ASB100_REG_WCHIPID 0x58
101 /* bit 7 -> enable, bits 0-3 -> duty cycle */
102 #define ASB100_REG_PWM1 0x59
105 Rounding and limit checking is only done on the TO_REG variants. */
107 /* These constants are a guess, consistent w/ w83781d */
108 #define ASB100_IN_MIN ( 0)
109 #define ASB100_IN_MAX (4080)
111 /* IN: 1/1000 V (0V to 4.08V)
113 static u8 IN_TO_REG(unsigned val)
115 unsigned nval = SENSORS_LIMIT(val, ASB100_IN_MIN, ASB100_IN_MAX);
116 return (nval + 8) / 16;
119 static unsigned IN_FROM_REG(u8 reg)
124 static u8 FAN_TO_REG(long rpm, int div)
130 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
131 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
134 static int FAN_FROM_REG(u8 val, int div)
136 return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div);
139 /* These constants are a guess, consistent w/ w83781d */
140 #define ASB100_TEMP_MIN (-128000)
141 #define ASB100_TEMP_MAX ( 127000)
143 /* TEMP: 0.001C/bit (-128C to +127C)
144 REG: 1C/bit, two's complement */
145 static u8 TEMP_TO_REG(int temp)
147 int ntemp = SENSORS_LIMIT(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX);
148 ntemp += (ntemp<0 ? -500 : 500);
149 return (u8)(ntemp / 1000);
152 static int TEMP_FROM_REG(u8 reg)
154 return (s8)reg * 1000;
157 /* PWM: 0 - 255 per sensors documentation
158 REG: (6.25% duty cycle per bit) */
159 static u8 ASB100_PWM_TO_REG(int pwm)
161 pwm = SENSORS_LIMIT(pwm, 0, 255);
162 return (u8)(pwm / 16);
165 static int ASB100_PWM_FROM_REG(u8 reg)
170 #define DIV_FROM_REG(val) (1 << (val))
172 /* FAN DIV: 1, 2, 4, or 8 (defaults to 2)
173 REG: 0, 1, 2, or 3 (respectively) (defaults to 1) */
174 static u8 DIV_TO_REG(long val)
176 return val==8 ? 3 : val==4 ? 2 : val==1 ? 0 : 1;
179 /* For each registered client, we need to keep some data in memory. That
180 data is pointed to by client->data. The structure itself is
181 dynamically allocated, at the same time the client itself is allocated. */
183 struct i2c_client client;
184 struct class_device *class_dev;
185 struct semaphore lock;
188 struct semaphore update_lock;
189 unsigned long last_updated; /* In jiffies */
191 /* array of 2 pointers to subclients */
192 struct i2c_client *lm75[2];
194 char valid; /* !=0 if following fields are valid */
195 u8 in[7]; /* Register value */
196 u8 in_max[7]; /* Register value */
197 u8 in_min[7]; /* Register value */
198 u8 fan[3]; /* Register value */
199 u8 fan_min[3]; /* Register value */
200 u16 temp[4]; /* Register value (0 and 3 are u8 only) */
201 u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */
202 u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */
203 u8 fan_div[3]; /* Register encoding, right justified */
204 u8 pwm; /* Register encoding */
205 u8 vid; /* Register encoding, combined */
206 u32 alarms; /* Register encoding, combined */
210 static int asb100_read_value(struct i2c_client *client, u16 reg);
211 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val);
213 static int asb100_attach_adapter(struct i2c_adapter *adapter);
214 static int asb100_detect(struct i2c_adapter *adapter, int address, int kind);
215 static int asb100_detach_client(struct i2c_client *client);
216 static struct asb100_data *asb100_update_device(struct device *dev);
217 static void asb100_init_client(struct i2c_client *client);
219 static struct i2c_driver asb100_driver = {
220 .owner = THIS_MODULE,
222 .id = I2C_DRIVERID_ASB100,
223 .attach_adapter = asb100_attach_adapter,
224 .detach_client = asb100_detach_client,
228 #define show_in_reg(reg) \
229 static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
231 struct asb100_data *data = asb100_update_device(dev); \
232 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
239 #define set_in_reg(REG, reg) \
240 static ssize_t set_in_##reg(struct device *dev, const char *buf, \
241 size_t count, int nr) \
243 struct i2c_client *client = to_i2c_client(dev); \
244 struct asb100_data *data = i2c_get_clientdata(client); \
245 unsigned long val = simple_strtoul(buf, NULL, 10); \
247 down(&data->update_lock); \
248 data->in_##reg[nr] = IN_TO_REG(val); \
249 asb100_write_value(client, ASB100_REG_IN_##REG(nr), \
250 data->in_##reg[nr]); \
251 up(&data->update_lock); \
258 #define sysfs_in(offset) \
260 show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \
262 return show_in(dev, buf, offset); \
264 static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
265 show_in##offset, NULL); \
267 show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
269 return show_in_min(dev, buf, offset); \
272 show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
274 return show_in_max(dev, buf, offset); \
276 static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \
277 const char *buf, size_t count) \
279 return set_in_min(dev, buf, count, offset); \
281 static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \
282 const char *buf, size_t count) \
284 return set_in_max(dev, buf, count, offset); \
286 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
287 show_in##offset##_min, set_in##offset##_min); \
288 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
289 show_in##offset##_max, set_in##offset##_max);
299 #define device_create_file_in(client, offset) do { \
300 device_create_file(&client->dev, &dev_attr_in##offset##_input); \
301 device_create_file(&client->dev, &dev_attr_in##offset##_min); \
302 device_create_file(&client->dev, &dev_attr_in##offset##_max); \
306 static ssize_t show_fan(struct device *dev, char *buf, int nr)
308 struct asb100_data *data = asb100_update_device(dev);
309 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
310 DIV_FROM_REG(data->fan_div[nr])));
313 static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
315 struct asb100_data *data = asb100_update_device(dev);
316 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
317 DIV_FROM_REG(data->fan_div[nr])));
320 static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
322 struct asb100_data *data = asb100_update_device(dev);
323 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
326 static ssize_t set_fan_min(struct device *dev, const char *buf,
327 size_t count, int nr)
329 struct i2c_client *client = to_i2c_client(dev);
330 struct asb100_data *data = i2c_get_clientdata(client);
331 u32 val = simple_strtoul(buf, NULL, 10);
333 down(&data->update_lock);
334 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
335 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
336 up(&data->update_lock);
340 /* Note: we save and restore the fan minimum here, because its value is
341 determined in part by the fan divisor. This follows the principle of
342 least suprise; the user doesn't expect the fan minimum to change just
343 because the divisor changed. */
344 static ssize_t set_fan_div(struct device *dev, const char *buf,
345 size_t count, int nr)
347 struct i2c_client *client = to_i2c_client(dev);
348 struct asb100_data *data = i2c_get_clientdata(client);
350 unsigned long val = simple_strtoul(buf, NULL, 10);
353 down(&data->update_lock);
355 min = FAN_FROM_REG(data->fan_min[nr],
356 DIV_FROM_REG(data->fan_div[nr]));
357 data->fan_div[nr] = DIV_TO_REG(val);
361 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
362 reg = (reg & 0xcf) | (data->fan_div[0] << 4);
363 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
367 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
368 reg = (reg & 0x3f) | (data->fan_div[1] << 6);
369 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
373 reg = asb100_read_value(client, ASB100_REG_PIN);
374 reg = (reg & 0x3f) | (data->fan_div[2] << 6);
375 asb100_write_value(client, ASB100_REG_PIN, reg);
380 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
381 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
383 up(&data->update_lock);
388 #define sysfs_fan(offset) \
389 static ssize_t show_fan##offset(struct device *dev, struct device_attribute *attr, char *buf) \
391 return show_fan(dev, buf, offset - 1); \
393 static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
395 return show_fan_min(dev, buf, offset - 1); \
397 static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \
399 return show_fan_div(dev, buf, offset - 1); \
401 static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
404 return set_fan_min(dev, buf, count, offset - 1); \
406 static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
409 return set_fan_div(dev, buf, count, offset - 1); \
411 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
412 show_fan##offset, NULL); \
413 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
414 show_fan##offset##_min, set_fan##offset##_min); \
415 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
416 show_fan##offset##_div, set_fan##offset##_div);
422 #define device_create_file_fan(client, offset) do { \
423 device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
424 device_create_file(&client->dev, &dev_attr_fan##offset##_min); \
425 device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
428 /* 4 Temp. Sensors */
429 static int sprintf_temp_from_reg(u16 reg, char *buf, int nr)
435 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg));
437 case 0: case 3: default:
438 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg));
444 #define show_temp_reg(reg) \
445 static ssize_t show_##reg(struct device *dev, char *buf, int nr) \
447 struct asb100_data *data = asb100_update_device(dev); \
448 return sprintf_temp_from_reg(data->reg[nr], buf, nr); \
452 show_temp_reg(temp_max);
453 show_temp_reg(temp_hyst);
455 #define set_temp_reg(REG, reg) \
456 static ssize_t set_##reg(struct device *dev, const char *buf, \
457 size_t count, int nr) \
459 struct i2c_client *client = to_i2c_client(dev); \
460 struct asb100_data *data = i2c_get_clientdata(client); \
461 unsigned long val = simple_strtoul(buf, NULL, 10); \
463 down(&data->update_lock); \
466 data->reg[nr] = LM75_TEMP_TO_REG(val); \
468 case 0: case 3: default: \
469 data->reg[nr] = TEMP_TO_REG(val); \
472 asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \
474 up(&data->update_lock); \
478 set_temp_reg(MAX, temp_max);
479 set_temp_reg(HYST, temp_hyst);
481 #define sysfs_temp(num) \
482 static ssize_t show_temp##num(struct device *dev, struct device_attribute *attr, char *buf) \
484 return show_temp(dev, buf, num-1); \
486 static DEVICE_ATTR(temp##num##_input, S_IRUGO, show_temp##num, NULL); \
487 static ssize_t show_temp_max##num(struct device *dev, struct device_attribute *attr, char *buf) \
489 return show_temp_max(dev, buf, num-1); \
491 static ssize_t set_temp_max##num(struct device *dev, struct device_attribute *attr, const char *buf, \
494 return set_temp_max(dev, buf, count, num-1); \
496 static DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \
497 show_temp_max##num, set_temp_max##num); \
498 static ssize_t show_temp_hyst##num(struct device *dev, struct device_attribute *attr, char *buf) \
500 return show_temp_hyst(dev, buf, num-1); \
502 static ssize_t set_temp_hyst##num(struct device *dev, struct device_attribute *attr, const char *buf, \
505 return set_temp_hyst(dev, buf, count, num-1); \
507 static DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \
508 show_temp_hyst##num, set_temp_hyst##num);
516 #define device_create_file_temp(client, num) do { \
517 device_create_file(&client->dev, &dev_attr_temp##num##_input); \
518 device_create_file(&client->dev, &dev_attr_temp##num##_max); \
519 device_create_file(&client->dev, &dev_attr_temp##num##_max_hyst); \
522 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
524 struct asb100_data *data = asb100_update_device(dev);
525 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
528 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
529 #define device_create_file_vid(client) \
530 device_create_file(&client->dev, &dev_attr_cpu0_vid)
533 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
535 struct asb100_data *data = asb100_update_device(dev);
536 return sprintf(buf, "%d\n", data->vrm);
539 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
541 struct i2c_client *client = to_i2c_client(dev);
542 struct asb100_data *data = i2c_get_clientdata(client);
543 unsigned long val = simple_strtoul(buf, NULL, 10);
549 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
550 #define device_create_file_vrm(client) \
551 device_create_file(&client->dev, &dev_attr_vrm);
553 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
555 struct asb100_data *data = asb100_update_device(dev);
556 return sprintf(buf, "%u\n", data->alarms);
559 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
560 #define device_create_file_alarms(client) \
561 device_create_file(&client->dev, &dev_attr_alarms)
564 static ssize_t show_pwm1(struct device *dev, struct device_attribute *attr, char *buf)
566 struct asb100_data *data = asb100_update_device(dev);
567 return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f));
570 static ssize_t set_pwm1(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
572 struct i2c_client *client = to_i2c_client(dev);
573 struct asb100_data *data = i2c_get_clientdata(client);
574 unsigned long val = simple_strtoul(buf, NULL, 10);
576 down(&data->update_lock);
577 data->pwm &= 0x80; /* keep the enable bit */
578 data->pwm |= (0x0f & ASB100_PWM_TO_REG(val));
579 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
580 up(&data->update_lock);
584 static ssize_t show_pwm_enable1(struct device *dev, struct device_attribute *attr, char *buf)
586 struct asb100_data *data = asb100_update_device(dev);
587 return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0);
590 static ssize_t set_pwm_enable1(struct device *dev, struct device_attribute *attr, const char *buf,
593 struct i2c_client *client = to_i2c_client(dev);
594 struct asb100_data *data = i2c_get_clientdata(client);
595 unsigned long val = simple_strtoul(buf, NULL, 10);
597 down(&data->update_lock);
598 data->pwm &= 0x0f; /* keep the duty cycle bits */
599 data->pwm |= (val ? 0x80 : 0x00);
600 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
601 up(&data->update_lock);
605 static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1);
606 static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
607 show_pwm_enable1, set_pwm_enable1);
608 #define device_create_file_pwm1(client) do { \
609 device_create_file(&new_client->dev, &dev_attr_pwm1); \
610 device_create_file(&new_client->dev, &dev_attr_pwm1_enable); \
613 /* This function is called when:
614 asb100_driver is inserted (when this module is loaded), for each
616 when a new adapter is inserted (and asb100_driver is still present)
618 static int asb100_attach_adapter(struct i2c_adapter *adapter)
620 if (!(adapter->class & I2C_CLASS_HWMON))
622 return i2c_probe(adapter, &addr_data, asb100_detect);
625 static int asb100_detect_subclients(struct i2c_adapter *adapter, int address,
626 int kind, struct i2c_client *new_client)
629 struct asb100_data *data = i2c_get_clientdata(new_client);
631 data->lm75[0] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
632 if (!(data->lm75[0])) {
637 data->lm75[1] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
638 if (!(data->lm75[1])) {
643 id = i2c_adapter_id(adapter);
645 if (force_subclients[0] == id && force_subclients[1] == address) {
646 for (i = 2; i <= 3; i++) {
647 if (force_subclients[i] < 0x48 ||
648 force_subclients[i] > 0x4f) {
649 dev_err(&new_client->dev, "invalid subclient "
650 "address %d; must be 0x48-0x4f\n",
651 force_subclients[i]);
656 asb100_write_value(new_client, ASB100_REG_I2C_SUBADDR,
657 (force_subclients[2] & 0x07) |
658 ((force_subclients[3] & 0x07) <<4));
659 data->lm75[0]->addr = force_subclients[2];
660 data->lm75[1]->addr = force_subclients[3];
662 int val = asb100_read_value(new_client, ASB100_REG_I2C_SUBADDR);
663 data->lm75[0]->addr = 0x48 + (val & 0x07);
664 data->lm75[1]->addr = 0x48 + ((val >> 4) & 0x07);
667 if(data->lm75[0]->addr == data->lm75[1]->addr) {
668 dev_err(&new_client->dev, "duplicate addresses 0x%x "
669 "for subclients\n", data->lm75[0]->addr);
674 for (i = 0; i <= 1; i++) {
675 i2c_set_clientdata(data->lm75[i], NULL);
676 data->lm75[i]->adapter = adapter;
677 data->lm75[i]->driver = &asb100_driver;
678 data->lm75[i]->flags = 0;
679 strlcpy(data->lm75[i]->name, "asb100 subclient", I2C_NAME_SIZE);
682 if ((err = i2c_attach_client(data->lm75[0]))) {
683 dev_err(&new_client->dev, "subclient %d registration "
684 "at address 0x%x failed.\n", i, data->lm75[0]->addr);
688 if ((err = i2c_attach_client(data->lm75[1]))) {
689 dev_err(&new_client->dev, "subclient %d registration "
690 "at address 0x%x failed.\n", i, data->lm75[1]->addr);
696 /* Undo inits in case of errors */
698 i2c_detach_client(data->lm75[0]);
700 kfree(data->lm75[1]);
702 kfree(data->lm75[0]);
707 static int asb100_detect(struct i2c_adapter *adapter, int address, int kind)
710 struct i2c_client *new_client;
711 struct asb100_data *data;
713 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
714 pr_debug("asb100.o: detect failed, "
715 "smbus byte data not supported!\n");
720 /* OK. For now, we presume we have a valid client. We now create the
721 client structure, even though we cannot fill it completely yet.
722 But it allows us to access asb100_{read,write}_value. */
724 if (!(data = kzalloc(sizeof(struct asb100_data), GFP_KERNEL))) {
725 pr_debug("asb100.o: detect failed, kzalloc failed!\n");
730 new_client = &data->client;
731 init_MUTEX(&data->lock);
732 i2c_set_clientdata(new_client, data);
733 new_client->addr = address;
734 new_client->adapter = adapter;
735 new_client->driver = &asb100_driver;
736 new_client->flags = 0;
738 /* Now, we do the remaining detection. */
740 /* The chip may be stuck in some other bank than bank 0. This may
741 make reading other information impossible. Specify a force=... or
742 force_*=... parameter, and the chip will be reset to the right
746 int val1 = asb100_read_value(new_client, ASB100_REG_BANK);
747 int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
749 /* If we're in bank 0 */
750 if ( (!(val1 & 0x07)) &&
751 /* Check for ASB100 ID (low byte) */
752 ( ((!(val1 & 0x80)) && (val2 != 0x94)) ||
753 /* Check for ASB100 ID (high byte ) */
754 ((val1 & 0x80) && (val2 != 0x06)) ) ) {
755 pr_debug("asb100.o: detect failed, "
756 "bad chip id 0x%02x!\n", val2);
763 /* We have either had a force parameter, or we have already detected
764 Winbond. Put it now into bank 0 and Vendor ID High Byte */
765 asb100_write_value(new_client, ASB100_REG_BANK,
766 (asb100_read_value(new_client, ASB100_REG_BANK) & 0x78) | 0x80);
768 /* Determine the chip type. */
770 int val1 = asb100_read_value(new_client, ASB100_REG_WCHIPID);
771 int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
773 if ((val1 == 0x31) && (val2 == 0x06))
777 dev_warn(&new_client->dev, "ignoring "
778 "'force' parameter for unknown chip "
779 "at adapter %d, address 0x%02x.\n",
780 i2c_adapter_id(adapter), address);
786 /* Fill in remaining client fields and put it into the global list */
787 strlcpy(new_client->name, "asb100", I2C_NAME_SIZE);
791 init_MUTEX(&data->update_lock);
793 /* Tell the I2C layer a new client has arrived */
794 if ((err = i2c_attach_client(new_client)))
797 /* Attach secondary lm75 clients */
798 if ((err = asb100_detect_subclients(adapter, address, kind,
802 /* Initialize the chip */
803 asb100_init_client(new_client);
805 /* A few vars need to be filled upon startup */
806 data->fan_min[0] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(0));
807 data->fan_min[1] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(1));
808 data->fan_min[2] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(2));
810 /* Register sysfs hooks */
811 data->class_dev = hwmon_device_register(&new_client->dev);
812 if (IS_ERR(data->class_dev)) {
813 err = PTR_ERR(data->class_dev);
817 device_create_file_in(new_client, 0);
818 device_create_file_in(new_client, 1);
819 device_create_file_in(new_client, 2);
820 device_create_file_in(new_client, 3);
821 device_create_file_in(new_client, 4);
822 device_create_file_in(new_client, 5);
823 device_create_file_in(new_client, 6);
825 device_create_file_fan(new_client, 1);
826 device_create_file_fan(new_client, 2);
827 device_create_file_fan(new_client, 3);
829 device_create_file_temp(new_client, 1);
830 device_create_file_temp(new_client, 2);
831 device_create_file_temp(new_client, 3);
832 device_create_file_temp(new_client, 4);
834 device_create_file_vid(new_client);
835 device_create_file_vrm(new_client);
837 device_create_file_alarms(new_client);
839 device_create_file_pwm1(new_client);
844 i2c_detach_client(data->lm75[1]);
845 i2c_detach_client(data->lm75[0]);
846 kfree(data->lm75[1]);
847 kfree(data->lm75[0]);
849 i2c_detach_client(new_client);
856 static int asb100_detach_client(struct i2c_client *client)
858 struct asb100_data *data = i2c_get_clientdata(client);
863 hwmon_device_unregister(data->class_dev);
865 if ((err = i2c_detach_client(client)))
879 /* The SMBus locks itself, usually, but nothing may access the chip between
881 static int asb100_read_value(struct i2c_client *client, u16 reg)
883 struct asb100_data *data = i2c_get_clientdata(client);
884 struct i2c_client *cl;
889 bank = (reg >> 8) & 0x0f;
892 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
894 if (bank == 0 || bank > 2) {
895 res = i2c_smbus_read_byte_data(client, reg & 0xff);
897 /* switch to subclient */
898 cl = data->lm75[bank - 1];
900 /* convert from ISA to LM75 I2C addresses */
901 switch (reg & 0xff) {
902 case 0x50: /* TEMP */
903 res = swab16(i2c_smbus_read_word_data (cl, 0));
905 case 0x52: /* CONFIG */
906 res = i2c_smbus_read_byte_data(cl, 1);
908 case 0x53: /* HYST */
909 res = swab16(i2c_smbus_read_word_data (cl, 2));
913 res = swab16(i2c_smbus_read_word_data (cl, 3));
919 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
926 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value)
928 struct asb100_data *data = i2c_get_clientdata(client);
929 struct i2c_client *cl;
934 bank = (reg >> 8) & 0x0f;
937 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
939 if (bank == 0 || bank > 2) {
940 i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff);
942 /* switch to subclient */
943 cl = data->lm75[bank - 1];
945 /* convert from ISA to LM75 I2C addresses */
946 switch (reg & 0xff) {
947 case 0x52: /* CONFIG */
948 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
950 case 0x53: /* HYST */
951 i2c_smbus_write_word_data(cl, 2, swab16(value));
954 i2c_smbus_write_word_data(cl, 3, swab16(value));
960 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
965 static void asb100_init_client(struct i2c_client *client)
967 struct asb100_data *data = i2c_get_clientdata(client);
970 vid = asb100_read_value(client, ASB100_REG_VID_FANDIV) & 0x0f;
971 vid |= (asb100_read_value(client, ASB100_REG_CHIPID) & 0x01) << 4;
972 data->vrm = vid_which_vrm();
973 vid = vid_from_reg(vid, data->vrm);
975 /* Start monitoring */
976 asb100_write_value(client, ASB100_REG_CONFIG,
977 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01);
980 static struct asb100_data *asb100_update_device(struct device *dev)
982 struct i2c_client *client = to_i2c_client(dev);
983 struct asb100_data *data = i2c_get_clientdata(client);
986 down(&data->update_lock);
988 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
991 dev_dbg(&client->dev, "starting device update...\n");
993 /* 7 voltage inputs */
994 for (i = 0; i < 7; i++) {
995 data->in[i] = asb100_read_value(client,
997 data->in_min[i] = asb100_read_value(client,
998 ASB100_REG_IN_MIN(i));
999 data->in_max[i] = asb100_read_value(client,
1000 ASB100_REG_IN_MAX(i));
1004 for (i = 0; i < 3; i++) {
1005 data->fan[i] = asb100_read_value(client,
1007 data->fan_min[i] = asb100_read_value(client,
1008 ASB100_REG_FAN_MIN(i));
1011 /* 4 temperature inputs */
1012 for (i = 1; i <= 4; i++) {
1013 data->temp[i-1] = asb100_read_value(client,
1014 ASB100_REG_TEMP(i));
1015 data->temp_max[i-1] = asb100_read_value(client,
1016 ASB100_REG_TEMP_MAX(i));
1017 data->temp_hyst[i-1] = asb100_read_value(client,
1018 ASB100_REG_TEMP_HYST(i));
1021 /* VID and fan divisors */
1022 i = asb100_read_value(client, ASB100_REG_VID_FANDIV);
1023 data->vid = i & 0x0f;
1024 data->vid |= (asb100_read_value(client,
1025 ASB100_REG_CHIPID) & 0x01) << 4;
1026 data->fan_div[0] = (i >> 4) & 0x03;
1027 data->fan_div[1] = (i >> 6) & 0x03;
1028 data->fan_div[2] = (asb100_read_value(client,
1029 ASB100_REG_PIN) >> 6) & 0x03;
1032 data->pwm = asb100_read_value(client, ASB100_REG_PWM1);
1035 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) +
1036 (asb100_read_value(client, ASB100_REG_ALARM2) << 8);
1038 data->last_updated = jiffies;
1041 dev_dbg(&client->dev, "... device update complete\n");
1044 up(&data->update_lock);
1049 static int __init asb100_init(void)
1051 return i2c_add_driver(&asb100_driver);
1054 static void __exit asb100_exit(void)
1056 i2c_del_driver(&asb100_driver);
1059 MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
1060 MODULE_DESCRIPTION("ASB100 Bach driver");
1061 MODULE_LICENSE("GPL");
1063 module_init(asb100_init);
1064 module_exit(asb100_exit);