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/i2c-sensor.h>
43 #include <linux/i2c-vid.h>
44 #include <linux/hwmon.h>
45 #include <linux/err.h>
46 #include <linux/init.h>
47 #include <linux/jiffies.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 /* ISA addresses to scan (none) */
60 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
62 /* Insmod parameters */
63 SENSORS_INSMOD_1(asb100);
64 I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
65 "{bus, clientaddr, subclientaddr1, subclientaddr2}");
67 /* Voltage IN registers 0-6 */
68 #define ASB100_REG_IN(nr) (0x20 + (nr))
69 #define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2))
70 #define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2))
72 /* FAN IN registers 1-3 */
73 #define ASB100_REG_FAN(nr) (0x28 + (nr))
74 #define ASB100_REG_FAN_MIN(nr) (0x3b + (nr))
76 /* TEMPERATURE registers 1-4 */
77 static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17};
78 static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18};
79 static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19};
81 #define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr])
82 #define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr])
83 #define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr])
85 #define ASB100_REG_TEMP2_CONFIG 0x0152
86 #define ASB100_REG_TEMP3_CONFIG 0x0252
89 #define ASB100_REG_CONFIG 0x40
90 #define ASB100_REG_ALARM1 0x41
91 #define ASB100_REG_ALARM2 0x42
92 #define ASB100_REG_SMIM1 0x43
93 #define ASB100_REG_SMIM2 0x44
94 #define ASB100_REG_VID_FANDIV 0x47
95 #define ASB100_REG_I2C_ADDR 0x48
96 #define ASB100_REG_CHIPID 0x49
97 #define ASB100_REG_I2C_SUBADDR 0x4a
98 #define ASB100_REG_PIN 0x4b
99 #define ASB100_REG_IRQ 0x4c
100 #define ASB100_REG_BANK 0x4e
101 #define ASB100_REG_CHIPMAN 0x4f
103 #define ASB100_REG_WCHIPID 0x58
105 /* bit 7 -> enable, bits 0-3 -> duty cycle */
106 #define ASB100_REG_PWM1 0x59
109 Rounding and limit checking is only done on the TO_REG variants. */
111 /* These constants are a guess, consistent w/ w83781d */
112 #define ASB100_IN_MIN ( 0)
113 #define ASB100_IN_MAX (4080)
115 /* IN: 1/1000 V (0V to 4.08V)
117 static u8 IN_TO_REG(unsigned val)
119 unsigned nval = SENSORS_LIMIT(val, ASB100_IN_MIN, ASB100_IN_MAX);
120 return (nval + 8) / 16;
123 static unsigned IN_FROM_REG(u8 reg)
128 static u8 FAN_TO_REG(long rpm, int div)
134 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
135 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
138 static int FAN_FROM_REG(u8 val, int div)
140 return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div);
143 /* These constants are a guess, consistent w/ w83781d */
144 #define ASB100_TEMP_MIN (-128000)
145 #define ASB100_TEMP_MAX ( 127000)
147 /* TEMP: 0.001C/bit (-128C to +127C)
148 REG: 1C/bit, two's complement */
149 static u8 TEMP_TO_REG(int temp)
151 int ntemp = SENSORS_LIMIT(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX);
152 ntemp += (ntemp<0 ? -500 : 500);
153 return (u8)(ntemp / 1000);
156 static int TEMP_FROM_REG(u8 reg)
158 return (s8)reg * 1000;
161 /* PWM: 0 - 255 per sensors documentation
162 REG: (6.25% duty cycle per bit) */
163 static u8 ASB100_PWM_TO_REG(int pwm)
165 pwm = SENSORS_LIMIT(pwm, 0, 255);
166 return (u8)(pwm / 16);
169 static int ASB100_PWM_FROM_REG(u8 reg)
174 #define DIV_FROM_REG(val) (1 << (val))
176 /* FAN DIV: 1, 2, 4, or 8 (defaults to 2)
177 REG: 0, 1, 2, or 3 (respectively) (defaults to 1) */
178 static u8 DIV_TO_REG(long val)
180 return val==8 ? 3 : val==4 ? 2 : val==1 ? 0 : 1;
183 /* For each registered client, we need to keep some data in memory. That
184 data is pointed to by client->data. The structure itself is
185 dynamically allocated, at the same time the client itself is allocated. */
187 struct i2c_client client;
188 struct class_device *class_dev;
189 struct semaphore lock;
192 struct semaphore update_lock;
193 unsigned long last_updated; /* In jiffies */
195 /* array of 2 pointers to subclients */
196 struct i2c_client *lm75[2];
198 char valid; /* !=0 if following fields are valid */
199 u8 in[7]; /* Register value */
200 u8 in_max[7]; /* Register value */
201 u8 in_min[7]; /* Register value */
202 u8 fan[3]; /* Register value */
203 u8 fan_min[3]; /* Register value */
204 u16 temp[4]; /* Register value (0 and 3 are u8 only) */
205 u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */
206 u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */
207 u8 fan_div[3]; /* Register encoding, right justified */
208 u8 pwm; /* Register encoding */
209 u8 vid; /* Register encoding, combined */
210 u32 alarms; /* Register encoding, combined */
214 static int asb100_read_value(struct i2c_client *client, u16 reg);
215 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val);
217 static int asb100_attach_adapter(struct i2c_adapter *adapter);
218 static int asb100_detect(struct i2c_adapter *adapter, int address, int kind);
219 static int asb100_detach_client(struct i2c_client *client);
220 static struct asb100_data *asb100_update_device(struct device *dev);
221 static void asb100_init_client(struct i2c_client *client);
223 static struct i2c_driver asb100_driver = {
224 .owner = THIS_MODULE,
226 .id = I2C_DRIVERID_ASB100,
227 .flags = I2C_DF_NOTIFY,
228 .attach_adapter = asb100_attach_adapter,
229 .detach_client = asb100_detach_client,
233 #define show_in_reg(reg) \
234 static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
236 struct asb100_data *data = asb100_update_device(dev); \
237 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
244 #define set_in_reg(REG, reg) \
245 static ssize_t set_in_##reg(struct device *dev, const char *buf, \
246 size_t count, int nr) \
248 struct i2c_client *client = to_i2c_client(dev); \
249 struct asb100_data *data = i2c_get_clientdata(client); \
250 unsigned long val = simple_strtoul(buf, NULL, 10); \
252 down(&data->update_lock); \
253 data->in_##reg[nr] = IN_TO_REG(val); \
254 asb100_write_value(client, ASB100_REG_IN_##REG(nr), \
255 data->in_##reg[nr]); \
256 up(&data->update_lock); \
263 #define sysfs_in(offset) \
265 show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \
267 return show_in(dev, buf, offset); \
269 static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
270 show_in##offset, NULL); \
272 show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
274 return show_in_min(dev, buf, offset); \
277 show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
279 return show_in_max(dev, buf, offset); \
281 static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \
282 const char *buf, size_t count) \
284 return set_in_min(dev, buf, count, offset); \
286 static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \
287 const char *buf, size_t count) \
289 return set_in_max(dev, buf, count, offset); \
291 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
292 show_in##offset##_min, set_in##offset##_min); \
293 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
294 show_in##offset##_max, set_in##offset##_max);
304 #define device_create_file_in(client, offset) do { \
305 device_create_file(&client->dev, &dev_attr_in##offset##_input); \
306 device_create_file(&client->dev, &dev_attr_in##offset##_min); \
307 device_create_file(&client->dev, &dev_attr_in##offset##_max); \
311 static ssize_t show_fan(struct device *dev, char *buf, int nr)
313 struct asb100_data *data = asb100_update_device(dev);
314 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
315 DIV_FROM_REG(data->fan_div[nr])));
318 static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
320 struct asb100_data *data = asb100_update_device(dev);
321 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
322 DIV_FROM_REG(data->fan_div[nr])));
325 static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
327 struct asb100_data *data = asb100_update_device(dev);
328 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
331 static ssize_t set_fan_min(struct device *dev, const char *buf,
332 size_t count, int nr)
334 struct i2c_client *client = to_i2c_client(dev);
335 struct asb100_data *data = i2c_get_clientdata(client);
336 u32 val = simple_strtoul(buf, NULL, 10);
338 down(&data->update_lock);
339 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
340 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
341 up(&data->update_lock);
345 /* Note: we save and restore the fan minimum here, because its value is
346 determined in part by the fan divisor. This follows the principle of
347 least suprise; the user doesn't expect the fan minimum to change just
348 because the divisor changed. */
349 static ssize_t set_fan_div(struct device *dev, const char *buf,
350 size_t count, int nr)
352 struct i2c_client *client = to_i2c_client(dev);
353 struct asb100_data *data = i2c_get_clientdata(client);
355 unsigned long val = simple_strtoul(buf, NULL, 10);
358 down(&data->update_lock);
360 min = FAN_FROM_REG(data->fan_min[nr],
361 DIV_FROM_REG(data->fan_div[nr]));
362 data->fan_div[nr] = DIV_TO_REG(val);
366 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
367 reg = (reg & 0xcf) | (data->fan_div[0] << 4);
368 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
372 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
373 reg = (reg & 0x3f) | (data->fan_div[1] << 6);
374 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
378 reg = asb100_read_value(client, ASB100_REG_PIN);
379 reg = (reg & 0x3f) | (data->fan_div[2] << 6);
380 asb100_write_value(client, ASB100_REG_PIN, reg);
385 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
386 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
388 up(&data->update_lock);
393 #define sysfs_fan(offset) \
394 static ssize_t show_fan##offset(struct device *dev, struct device_attribute *attr, char *buf) \
396 return show_fan(dev, buf, offset - 1); \
398 static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
400 return show_fan_min(dev, buf, offset - 1); \
402 static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \
404 return show_fan_div(dev, buf, offset - 1); \
406 static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
409 return set_fan_min(dev, buf, count, offset - 1); \
411 static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
414 return set_fan_div(dev, buf, count, offset - 1); \
416 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
417 show_fan##offset, NULL); \
418 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
419 show_fan##offset##_min, set_fan##offset##_min); \
420 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
421 show_fan##offset##_div, set_fan##offset##_div);
427 #define device_create_file_fan(client, offset) do { \
428 device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
429 device_create_file(&client->dev, &dev_attr_fan##offset##_min); \
430 device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
433 /* 4 Temp. Sensors */
434 static int sprintf_temp_from_reg(u16 reg, char *buf, int nr)
440 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg));
442 case 0: case 3: default:
443 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg));
449 #define show_temp_reg(reg) \
450 static ssize_t show_##reg(struct device *dev, char *buf, int nr) \
452 struct asb100_data *data = asb100_update_device(dev); \
453 return sprintf_temp_from_reg(data->reg[nr], buf, nr); \
457 show_temp_reg(temp_max);
458 show_temp_reg(temp_hyst);
460 #define set_temp_reg(REG, reg) \
461 static ssize_t set_##reg(struct device *dev, const char *buf, \
462 size_t count, int nr) \
464 struct i2c_client *client = to_i2c_client(dev); \
465 struct asb100_data *data = i2c_get_clientdata(client); \
466 unsigned long val = simple_strtoul(buf, NULL, 10); \
468 down(&data->update_lock); \
471 data->reg[nr] = LM75_TEMP_TO_REG(val); \
473 case 0: case 3: default: \
474 data->reg[nr] = TEMP_TO_REG(val); \
477 asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \
479 up(&data->update_lock); \
483 set_temp_reg(MAX, temp_max);
484 set_temp_reg(HYST, temp_hyst);
486 #define sysfs_temp(num) \
487 static ssize_t show_temp##num(struct device *dev, struct device_attribute *attr, char *buf) \
489 return show_temp(dev, buf, num-1); \
491 static DEVICE_ATTR(temp##num##_input, S_IRUGO, show_temp##num, NULL); \
492 static ssize_t show_temp_max##num(struct device *dev, struct device_attribute *attr, char *buf) \
494 return show_temp_max(dev, buf, num-1); \
496 static ssize_t set_temp_max##num(struct device *dev, struct device_attribute *attr, const char *buf, \
499 return set_temp_max(dev, buf, count, num-1); \
501 static DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \
502 show_temp_max##num, set_temp_max##num); \
503 static ssize_t show_temp_hyst##num(struct device *dev, struct device_attribute *attr, char *buf) \
505 return show_temp_hyst(dev, buf, num-1); \
507 static ssize_t set_temp_hyst##num(struct device *dev, struct device_attribute *attr, const char *buf, \
510 return set_temp_hyst(dev, buf, count, num-1); \
512 static DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \
513 show_temp_hyst##num, set_temp_hyst##num);
521 #define device_create_file_temp(client, num) do { \
522 device_create_file(&client->dev, &dev_attr_temp##num##_input); \
523 device_create_file(&client->dev, &dev_attr_temp##num##_max); \
524 device_create_file(&client->dev, &dev_attr_temp##num##_max_hyst); \
527 static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
529 struct asb100_data *data = asb100_update_device(dev);
530 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
533 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
534 #define device_create_file_vid(client) \
535 device_create_file(&client->dev, &dev_attr_cpu0_vid)
538 static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
540 struct asb100_data *data = asb100_update_device(dev);
541 return sprintf(buf, "%d\n", data->vrm);
544 static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
546 struct i2c_client *client = to_i2c_client(dev);
547 struct asb100_data *data = i2c_get_clientdata(client);
548 unsigned long val = simple_strtoul(buf, NULL, 10);
554 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
555 #define device_create_file_vrm(client) \
556 device_create_file(&client->dev, &dev_attr_vrm);
558 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
560 struct asb100_data *data = asb100_update_device(dev);
561 return sprintf(buf, "%u\n", data->alarms);
564 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
565 #define device_create_file_alarms(client) \
566 device_create_file(&client->dev, &dev_attr_alarms)
569 static ssize_t show_pwm1(struct device *dev, struct device_attribute *attr, char *buf)
571 struct asb100_data *data = asb100_update_device(dev);
572 return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f));
575 static ssize_t set_pwm1(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
577 struct i2c_client *client = to_i2c_client(dev);
578 struct asb100_data *data = i2c_get_clientdata(client);
579 unsigned long val = simple_strtoul(buf, NULL, 10);
581 down(&data->update_lock);
582 data->pwm &= 0x80; /* keep the enable bit */
583 data->pwm |= (0x0f & ASB100_PWM_TO_REG(val));
584 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
585 up(&data->update_lock);
589 static ssize_t show_pwm_enable1(struct device *dev, struct device_attribute *attr, char *buf)
591 struct asb100_data *data = asb100_update_device(dev);
592 return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0);
595 static ssize_t set_pwm_enable1(struct device *dev, struct device_attribute *attr, const char *buf,
598 struct i2c_client *client = to_i2c_client(dev);
599 struct asb100_data *data = i2c_get_clientdata(client);
600 unsigned long val = simple_strtoul(buf, NULL, 10);
602 down(&data->update_lock);
603 data->pwm &= 0x0f; /* keep the duty cycle bits */
604 data->pwm |= (val ? 0x80 : 0x00);
605 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
606 up(&data->update_lock);
610 static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1);
611 static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
612 show_pwm_enable1, set_pwm_enable1);
613 #define device_create_file_pwm1(client) do { \
614 device_create_file(&new_client->dev, &dev_attr_pwm1); \
615 device_create_file(&new_client->dev, &dev_attr_pwm1_enable); \
618 /* This function is called when:
619 asb100_driver is inserted (when this module is loaded), for each
621 when a new adapter is inserted (and asb100_driver is still present)
623 static int asb100_attach_adapter(struct i2c_adapter *adapter)
625 if (!(adapter->class & I2C_CLASS_HWMON))
627 return i2c_detect(adapter, &addr_data, asb100_detect);
630 static int asb100_detect_subclients(struct i2c_adapter *adapter, int address,
631 int kind, struct i2c_client *new_client)
634 struct asb100_data *data = i2c_get_clientdata(new_client);
636 data->lm75[0] = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
637 if (!(data->lm75[0])) {
641 memset(data->lm75[0], 0x00, sizeof(struct i2c_client));
643 data->lm75[1] = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
644 if (!(data->lm75[1])) {
648 memset(data->lm75[1], 0x00, sizeof(struct i2c_client));
650 id = i2c_adapter_id(adapter);
652 if (force_subclients[0] == id && force_subclients[1] == address) {
653 for (i = 2; i <= 3; i++) {
654 if (force_subclients[i] < 0x48 ||
655 force_subclients[i] > 0x4f) {
656 dev_err(&new_client->dev, "invalid subclient "
657 "address %d; must be 0x48-0x4f\n",
658 force_subclients[i]);
663 asb100_write_value(new_client, ASB100_REG_I2C_SUBADDR,
664 (force_subclients[2] & 0x07) |
665 ((force_subclients[3] & 0x07) <<4));
666 data->lm75[0]->addr = force_subclients[2];
667 data->lm75[1]->addr = force_subclients[3];
669 int val = asb100_read_value(new_client, ASB100_REG_I2C_SUBADDR);
670 data->lm75[0]->addr = 0x48 + (val & 0x07);
671 data->lm75[1]->addr = 0x48 + ((val >> 4) & 0x07);
674 if(data->lm75[0]->addr == data->lm75[1]->addr) {
675 dev_err(&new_client->dev, "duplicate addresses 0x%x "
676 "for subclients\n", data->lm75[0]->addr);
681 for (i = 0; i <= 1; i++) {
682 i2c_set_clientdata(data->lm75[i], NULL);
683 data->lm75[i]->adapter = adapter;
684 data->lm75[i]->driver = &asb100_driver;
685 data->lm75[i]->flags = 0;
686 strlcpy(data->lm75[i]->name, "asb100 subclient", I2C_NAME_SIZE);
689 if ((err = i2c_attach_client(data->lm75[0]))) {
690 dev_err(&new_client->dev, "subclient %d registration "
691 "at address 0x%x failed.\n", i, data->lm75[0]->addr);
695 if ((err = i2c_attach_client(data->lm75[1]))) {
696 dev_err(&new_client->dev, "subclient %d registration "
697 "at address 0x%x failed.\n", i, data->lm75[1]->addr);
703 /* Undo inits in case of errors */
705 i2c_detach_client(data->lm75[0]);
707 kfree(data->lm75[1]);
709 kfree(data->lm75[0]);
714 static int asb100_detect(struct i2c_adapter *adapter, int address, int kind)
717 struct i2c_client *new_client;
718 struct asb100_data *data;
720 /* asb100 is SMBus only */
721 if (i2c_is_isa_adapter(adapter)) {
722 pr_debug("asb100.o: detect failed, "
723 "cannot attach to legacy adapter!\n");
728 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
729 pr_debug("asb100.o: detect failed, "
730 "smbus byte data not supported!\n");
735 /* OK. For now, we presume we have a valid client. We now create the
736 client structure, even though we cannot fill it completely yet.
737 But it allows us to access asb100_{read,write}_value. */
739 if (!(data = kmalloc(sizeof(struct asb100_data), GFP_KERNEL))) {
740 pr_debug("asb100.o: detect failed, kmalloc failed!\n");
744 memset(data, 0, sizeof(struct asb100_data));
746 new_client = &data->client;
747 init_MUTEX(&data->lock);
748 i2c_set_clientdata(new_client, data);
749 new_client->addr = address;
750 new_client->adapter = adapter;
751 new_client->driver = &asb100_driver;
752 new_client->flags = 0;
754 /* Now, we do the remaining detection. */
756 /* The chip may be stuck in some other bank than bank 0. This may
757 make reading other information impossible. Specify a force=... or
758 force_*=... parameter, and the chip will be reset to the right
762 int val1 = asb100_read_value(new_client, ASB100_REG_BANK);
763 int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
765 /* If we're in bank 0 */
766 if ( (!(val1 & 0x07)) &&
767 /* Check for ASB100 ID (low byte) */
768 ( ((!(val1 & 0x80)) && (val2 != 0x94)) ||
769 /* Check for ASB100 ID (high byte ) */
770 ((val1 & 0x80) && (val2 != 0x06)) ) ) {
771 pr_debug("asb100.o: detect failed, "
772 "bad chip id 0x%02x!\n", val2);
779 /* We have either had a force parameter, or we have already detected
780 Winbond. Put it now into bank 0 and Vendor ID High Byte */
781 asb100_write_value(new_client, ASB100_REG_BANK,
782 (asb100_read_value(new_client, ASB100_REG_BANK) & 0x78) | 0x80);
784 /* Determine the chip type. */
786 int val1 = asb100_read_value(new_client, ASB100_REG_WCHIPID);
787 int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
789 if ((val1 == 0x31) && (val2 == 0x06))
793 dev_warn(&new_client->dev, "ignoring "
794 "'force' parameter for unknown chip "
795 "at adapter %d, address 0x%02x.\n",
796 i2c_adapter_id(adapter), address);
802 /* Fill in remaining client fields and put it into the global list */
803 strlcpy(new_client->name, "asb100", I2C_NAME_SIZE);
807 init_MUTEX(&data->update_lock);
809 /* Tell the I2C layer a new client has arrived */
810 if ((err = i2c_attach_client(new_client)))
813 /* Attach secondary lm75 clients */
814 if ((err = asb100_detect_subclients(adapter, address, kind,
818 /* Initialize the chip */
819 asb100_init_client(new_client);
821 /* A few vars need to be filled upon startup */
822 data->fan_min[0] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(0));
823 data->fan_min[1] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(1));
824 data->fan_min[2] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(2));
826 /* Register sysfs hooks */
827 data->class_dev = hwmon_device_register(&new_client->dev);
828 if (IS_ERR(data->class_dev)) {
829 err = PTR_ERR(data->class_dev);
833 device_create_file_in(new_client, 0);
834 device_create_file_in(new_client, 1);
835 device_create_file_in(new_client, 2);
836 device_create_file_in(new_client, 3);
837 device_create_file_in(new_client, 4);
838 device_create_file_in(new_client, 5);
839 device_create_file_in(new_client, 6);
841 device_create_file_fan(new_client, 1);
842 device_create_file_fan(new_client, 2);
843 device_create_file_fan(new_client, 3);
845 device_create_file_temp(new_client, 1);
846 device_create_file_temp(new_client, 2);
847 device_create_file_temp(new_client, 3);
848 device_create_file_temp(new_client, 4);
850 device_create_file_vid(new_client);
851 device_create_file_vrm(new_client);
853 device_create_file_alarms(new_client);
855 device_create_file_pwm1(new_client);
860 i2c_detach_client(data->lm75[1]);
861 i2c_detach_client(data->lm75[0]);
862 kfree(data->lm75[1]);
863 kfree(data->lm75[0]);
865 i2c_detach_client(new_client);
872 static int asb100_detach_client(struct i2c_client *client)
874 struct asb100_data *data = i2c_get_clientdata(client);
879 hwmon_device_unregister(data->class_dev);
881 if ((err = i2c_detach_client(client))) {
882 dev_err(&client->dev, "client deregistration failed; "
883 "client not detached.\n");
898 /* The SMBus locks itself, usually, but nothing may access the chip between
900 static int asb100_read_value(struct i2c_client *client, u16 reg)
902 struct asb100_data *data = i2c_get_clientdata(client);
903 struct i2c_client *cl;
908 bank = (reg >> 8) & 0x0f;
911 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
913 if (bank == 0 || bank > 2) {
914 res = i2c_smbus_read_byte_data(client, reg & 0xff);
916 /* switch to subclient */
917 cl = data->lm75[bank - 1];
919 /* convert from ISA to LM75 I2C addresses */
920 switch (reg & 0xff) {
921 case 0x50: /* TEMP */
922 res = swab16(i2c_smbus_read_word_data (cl, 0));
924 case 0x52: /* CONFIG */
925 res = i2c_smbus_read_byte_data(cl, 1);
927 case 0x53: /* HYST */
928 res = swab16(i2c_smbus_read_word_data (cl, 2));
932 res = swab16(i2c_smbus_read_word_data (cl, 3));
938 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
945 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value)
947 struct asb100_data *data = i2c_get_clientdata(client);
948 struct i2c_client *cl;
953 bank = (reg >> 8) & 0x0f;
956 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
958 if (bank == 0 || bank > 2) {
959 i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff);
961 /* switch to subclient */
962 cl = data->lm75[bank - 1];
964 /* convert from ISA to LM75 I2C addresses */
965 switch (reg & 0xff) {
966 case 0x52: /* CONFIG */
967 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
969 case 0x53: /* HYST */
970 i2c_smbus_write_word_data(cl, 2, swab16(value));
973 i2c_smbus_write_word_data(cl, 3, swab16(value));
979 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
984 static void asb100_init_client(struct i2c_client *client)
986 struct asb100_data *data = i2c_get_clientdata(client);
989 vid = asb100_read_value(client, ASB100_REG_VID_FANDIV) & 0x0f;
990 vid |= (asb100_read_value(client, ASB100_REG_CHIPID) & 0x01) << 4;
991 data->vrm = i2c_which_vrm();
992 vid = vid_from_reg(vid, data->vrm);
994 /* Start monitoring */
995 asb100_write_value(client, ASB100_REG_CONFIG,
996 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01);
999 static struct asb100_data *asb100_update_device(struct device *dev)
1001 struct i2c_client *client = to_i2c_client(dev);
1002 struct asb100_data *data = i2c_get_clientdata(client);
1005 down(&data->update_lock);
1007 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1010 dev_dbg(&client->dev, "starting device update...\n");
1012 /* 7 voltage inputs */
1013 for (i = 0; i < 7; i++) {
1014 data->in[i] = asb100_read_value(client,
1016 data->in_min[i] = asb100_read_value(client,
1017 ASB100_REG_IN_MIN(i));
1018 data->in_max[i] = asb100_read_value(client,
1019 ASB100_REG_IN_MAX(i));
1023 for (i = 0; i < 3; i++) {
1024 data->fan[i] = asb100_read_value(client,
1026 data->fan_min[i] = asb100_read_value(client,
1027 ASB100_REG_FAN_MIN(i));
1030 /* 4 temperature inputs */
1031 for (i = 1; i <= 4; i++) {
1032 data->temp[i-1] = asb100_read_value(client,
1033 ASB100_REG_TEMP(i));
1034 data->temp_max[i-1] = asb100_read_value(client,
1035 ASB100_REG_TEMP_MAX(i));
1036 data->temp_hyst[i-1] = asb100_read_value(client,
1037 ASB100_REG_TEMP_HYST(i));
1040 /* VID and fan divisors */
1041 i = asb100_read_value(client, ASB100_REG_VID_FANDIV);
1042 data->vid = i & 0x0f;
1043 data->vid |= (asb100_read_value(client,
1044 ASB100_REG_CHIPID) & 0x01) << 4;
1045 data->fan_div[0] = (i >> 4) & 0x03;
1046 data->fan_div[1] = (i >> 6) & 0x03;
1047 data->fan_div[2] = (asb100_read_value(client,
1048 ASB100_REG_PIN) >> 6) & 0x03;
1051 data->pwm = asb100_read_value(client, ASB100_REG_PWM1);
1054 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) +
1055 (asb100_read_value(client, ASB100_REG_ALARM2) << 8);
1057 data->last_updated = jiffies;
1060 dev_dbg(&client->dev, "... device update complete\n");
1063 up(&data->update_lock);
1068 static int __init asb100_init(void)
1070 return i2c_add_driver(&asb100_driver);
1073 static void __exit asb100_exit(void)
1075 i2c_del_driver(&asb100_driver);
1078 MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
1079 MODULE_DESCRIPTION("ASB100 Bach driver");
1080 MODULE_LICENSE("GPL");
1082 module_init(asb100_init);
1083 module_exit(asb100_exit);