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/config.h>
40 #include <linux/module.h>
41 #include <linux/slab.h>
42 #include <linux/ioport.h>
43 #include <linux/types.h>
44 #include <linux/i2c.h>
45 #include <linux/i2c-sensor.h>
46 #include <linux/i2c-vid.h>
47 #include <linux/init.h>
48 #include <asm/errno.h>
54 2003-12-29 1.0.0 Ported from lm_sensors project for kernel 2.6
56 #define ASB100_VERSION "1.0.0"
58 /* I2C addresses to scan */
59 static unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END };
61 /* ISA addresses to scan (none) */
62 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
64 /* Insmod parameters */
65 SENSORS_INSMOD_1(asb100);
66 I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
67 "{bus, clientaddr, subclientaddr1, subclientaddr2}");
69 /* Voltage IN registers 0-6 */
70 #define ASB100_REG_IN(nr) (0x20 + (nr))
71 #define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2))
72 #define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2))
74 /* FAN IN registers 1-3 */
75 #define ASB100_REG_FAN(nr) (0x28 + (nr))
76 #define ASB100_REG_FAN_MIN(nr) (0x3b + (nr))
78 /* TEMPERATURE registers 1-4 */
79 static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17};
80 static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18};
81 static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19};
83 #define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr])
84 #define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr])
85 #define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr])
87 #define ASB100_REG_TEMP2_CONFIG 0x0152
88 #define ASB100_REG_TEMP3_CONFIG 0x0252
91 #define ASB100_REG_CONFIG 0x40
92 #define ASB100_REG_ALARM1 0x41
93 #define ASB100_REG_ALARM2 0x42
94 #define ASB100_REG_SMIM1 0x43
95 #define ASB100_REG_SMIM2 0x44
96 #define ASB100_REG_VID_FANDIV 0x47
97 #define ASB100_REG_I2C_ADDR 0x48
98 #define ASB100_REG_CHIPID 0x49
99 #define ASB100_REG_I2C_SUBADDR 0x4a
100 #define ASB100_REG_PIN 0x4b
101 #define ASB100_REG_IRQ 0x4c
102 #define ASB100_REG_BANK 0x4e
103 #define ASB100_REG_CHIPMAN 0x4f
105 #define ASB100_REG_WCHIPID 0x58
107 /* bit 7 -> enable, bits 0-3 -> duty cycle */
108 #define ASB100_REG_PWM1 0x59
111 Rounding and limit checking is only done on the TO_REG variants. */
113 /* These constants are a guess, consistent w/ w83781d */
114 #define ASB100_IN_MIN ( 0)
115 #define ASB100_IN_MAX (4080)
117 /* IN: 1/1000 V (0V to 4.08V)
119 static u8 IN_TO_REG(unsigned val)
121 unsigned nval = SENSORS_LIMIT(val, ASB100_IN_MIN, ASB100_IN_MAX);
122 return (nval + 8) / 16;
125 static unsigned IN_FROM_REG(u8 reg)
130 static u8 FAN_TO_REG(long rpm, int div)
136 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
137 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
140 static int FAN_FROM_REG(u8 val, int div)
142 return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div);
145 /* These constants are a guess, consistent w/ w83781d */
146 #define ASB100_TEMP_MIN (-128000)
147 #define ASB100_TEMP_MAX ( 127000)
149 /* TEMP: 0.001C/bit (-128C to +127C)
150 REG: 1C/bit, two's complement */
151 static u8 TEMP_TO_REG(int temp)
153 int ntemp = SENSORS_LIMIT(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX);
154 ntemp += (ntemp<0 ? -500 : 500);
155 return (u8)(ntemp / 1000);
158 static int TEMP_FROM_REG(u8 reg)
160 return (s8)reg * 1000;
163 /* PWM: 0 - 255 per sensors documentation
164 REG: (6.25% duty cycle per bit) */
165 static u8 ASB100_PWM_TO_REG(int pwm)
167 pwm = SENSORS_LIMIT(pwm, 0, 255);
168 return (u8)(pwm / 16);
171 static int ASB100_PWM_FROM_REG(u8 reg)
176 #define ALARMS_FROM_REG(val) (val)
178 #define DIV_FROM_REG(val) (1 << (val))
180 /* FAN DIV: 1, 2, 4, or 8 (defaults to 2)
181 REG: 0, 1, 2, or 3 (respectively) (defaults to 1) */
182 static u8 DIV_TO_REG(long val)
184 return val==8 ? 3 : val==4 ? 2 : val==1 ? 0 : 1;
187 /* For each registered client, we need to keep some data in memory. That
188 data is pointed to by client->data. The structure itself is
189 dynamically allocated, at the same time the client itself is allocated. */
191 struct i2c_client client;
192 struct semaphore lock;
195 struct semaphore update_lock;
196 unsigned long last_updated; /* In jiffies */
198 /* array of 2 pointers to subclients */
199 struct i2c_client *lm75[2];
201 char valid; /* !=0 if following fields are valid */
202 u8 in[7]; /* Register value */
203 u8 in_max[7]; /* Register value */
204 u8 in_min[7]; /* Register value */
205 u8 fan[3]; /* Register value */
206 u8 fan_min[3]; /* Register value */
207 u16 temp[4]; /* Register value (0 and 3 are u8 only) */
208 u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */
209 u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */
210 u8 fan_div[3]; /* Register encoding, right justified */
211 u8 pwm; /* Register encoding */
212 u8 vid; /* Register encoding, combined */
213 u32 alarms; /* Register encoding, combined */
217 static int asb100_read_value(struct i2c_client *client, u16 reg);
218 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val);
220 static int asb100_attach_adapter(struct i2c_adapter *adapter);
221 static int asb100_detect(struct i2c_adapter *adapter, int address, int kind);
222 static int asb100_detach_client(struct i2c_client *client);
223 static struct asb100_data *asb100_update_device(struct device *dev);
224 static void asb100_init_client(struct i2c_client *client);
226 static struct i2c_driver asb100_driver = {
227 .owner = THIS_MODULE,
229 .id = I2C_DRIVERID_ASB100,
230 .flags = I2C_DF_NOTIFY,
231 .attach_adapter = asb100_attach_adapter,
232 .detach_client = asb100_detach_client,
236 #define show_in_reg(reg) \
237 static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
239 struct asb100_data *data = asb100_update_device(dev); \
240 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
247 #define set_in_reg(REG, reg) \
248 static ssize_t set_in_##reg(struct device *dev, const char *buf, \
249 size_t count, int nr) \
251 struct i2c_client *client = to_i2c_client(dev); \
252 struct asb100_data *data = i2c_get_clientdata(client); \
253 unsigned long val = simple_strtoul(buf, NULL, 10); \
254 data->in_##reg[nr] = IN_TO_REG(val); \
255 asb100_write_value(client, ASB100_REG_IN_##REG(nr), \
256 data->in_##reg[nr]); \
263 #define sysfs_in(offset) \
265 show_in##offset (struct device *dev, 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, char *buf) \
274 return show_in_min(dev, buf, offset); \
277 show_in##offset##_max (struct device *dev, char *buf) \
279 return show_in_max(dev, buf, offset); \
281 static ssize_t set_in##offset##_min (struct device *dev, \
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, \
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);
337 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
338 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
342 /* Note: we save and restore the fan minimum here, because its value is
343 determined in part by the fan divisor. This follows the principle of
344 least suprise; the user doesn't expect the fan minimum to change just
345 because the divisor changed. */
346 static ssize_t set_fan_div(struct device *dev, const char *buf,
347 size_t count, int nr)
349 struct i2c_client *client = to_i2c_client(dev);
350 struct asb100_data *data = i2c_get_clientdata(client);
351 unsigned long min = FAN_FROM_REG(data->fan_min[nr],
352 DIV_FROM_REG(data->fan_div[nr]));
353 unsigned long val = simple_strtoul(buf, NULL, 10);
356 data->fan_div[nr] = DIV_TO_REG(val);
360 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
361 reg = (reg & 0xcf) | (data->fan_div[0] << 4);
362 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
366 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
367 reg = (reg & 0x3f) | (data->fan_div[1] << 6);
368 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
372 reg = asb100_read_value(client, ASB100_REG_PIN);
373 reg = (reg & 0x3f) | (data->fan_div[2] << 6);
374 asb100_write_value(client, ASB100_REG_PIN, reg);
379 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
380 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
384 #define sysfs_fan(offset) \
385 static ssize_t show_fan##offset(struct device *dev, char *buf) \
387 return show_fan(dev, buf, offset - 1); \
389 static ssize_t show_fan##offset##_min(struct device *dev, char *buf) \
391 return show_fan_min(dev, buf, offset - 1); \
393 static ssize_t show_fan##offset##_div(struct device *dev, char *buf) \
395 return show_fan_div(dev, buf, offset - 1); \
397 static ssize_t set_fan##offset##_min(struct device *dev, const char *buf, \
400 return set_fan_min(dev, buf, count, offset - 1); \
402 static ssize_t set_fan##offset##_div(struct device *dev, const char *buf, \
405 return set_fan_div(dev, buf, count, offset - 1); \
407 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
408 show_fan##offset, NULL); \
409 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
410 show_fan##offset##_min, set_fan##offset##_min); \
411 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
412 show_fan##offset##_div, set_fan##offset##_div);
418 #define device_create_file_fan(client, offset) do { \
419 device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
420 device_create_file(&client->dev, &dev_attr_fan##offset##_min); \
421 device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
424 /* 4 Temp. Sensors */
425 static int sprintf_temp_from_reg(u16 reg, char *buf, int nr)
431 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg));
433 case 0: case 3: default:
434 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg));
440 #define show_temp_reg(reg) \
441 static ssize_t show_##reg(struct device *dev, char *buf, int nr) \
443 struct asb100_data *data = asb100_update_device(dev); \
444 return sprintf_temp_from_reg(data->reg[nr], buf, nr); \
448 show_temp_reg(temp_max);
449 show_temp_reg(temp_hyst);
451 #define set_temp_reg(REG, reg) \
452 static ssize_t set_##reg(struct device *dev, const char *buf, \
453 size_t count, int nr) \
455 struct i2c_client *client = to_i2c_client(dev); \
456 struct asb100_data *data = i2c_get_clientdata(client); \
457 unsigned long val = simple_strtoul(buf, NULL, 10); \
460 data->reg[nr] = LM75_TEMP_TO_REG(val); \
462 case 0: case 3: default: \
463 data->reg[nr] = TEMP_TO_REG(val); \
466 asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \
471 set_temp_reg(MAX, temp_max);
472 set_temp_reg(HYST, temp_hyst);
474 #define sysfs_temp(num) \
475 static ssize_t show_temp##num(struct device *dev, char *buf) \
477 return show_temp(dev, buf, num-1); \
479 static DEVICE_ATTR(temp##num##_input, S_IRUGO, show_temp##num, NULL); \
480 static ssize_t show_temp_max##num(struct device *dev, char *buf) \
482 return show_temp_max(dev, buf, num-1); \
484 static ssize_t set_temp_max##num(struct device *dev, const char *buf, \
487 return set_temp_max(dev, buf, count, num-1); \
489 static DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \
490 show_temp_max##num, set_temp_max##num); \
491 static ssize_t show_temp_hyst##num(struct device *dev, char *buf) \
493 return show_temp_hyst(dev, buf, num-1); \
495 static ssize_t set_temp_hyst##num(struct device *dev, const char *buf, \
498 return set_temp_hyst(dev, buf, count, num-1); \
500 static DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \
501 show_temp_hyst##num, set_temp_hyst##num);
509 #define device_create_file_temp(client, num) do { \
510 device_create_file(&client->dev, &dev_attr_temp##num##_input); \
511 device_create_file(&client->dev, &dev_attr_temp##num##_max); \
512 device_create_file(&client->dev, &dev_attr_temp##num##_max_hyst); \
515 static ssize_t show_vid(struct device *dev, char *buf)
517 struct asb100_data *data = asb100_update_device(dev);
518 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
521 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
522 #define device_create_file_vid(client) \
523 device_create_file(&client->dev, &dev_attr_cpu0_vid)
526 static ssize_t show_vrm(struct device *dev, char *buf)
528 struct asb100_data *data = asb100_update_device(dev);
529 return sprintf(buf, "%d\n", data->vrm);
532 static ssize_t set_vrm(struct device *dev, const char *buf, size_t count)
534 struct i2c_client *client = to_i2c_client(dev);
535 struct asb100_data *data = i2c_get_clientdata(client);
536 unsigned long val = simple_strtoul(buf, NULL, 10);
542 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
543 #define device_create_file_vrm(client) \
544 device_create_file(&client->dev, &dev_attr_vrm);
546 static ssize_t show_alarms(struct device *dev, char *buf)
548 struct asb100_data *data = asb100_update_device(dev);
549 return sprintf(buf, "%d\n", ALARMS_FROM_REG(data->alarms));
552 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
553 #define device_create_file_alarms(client) \
554 device_create_file(&client->dev, &dev_attr_alarms)
557 static ssize_t show_pwm1(struct device *dev, char *buf)
559 struct asb100_data *data = asb100_update_device(dev);
560 return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f));
563 static ssize_t set_pwm1(struct device *dev, const char *buf, size_t count)
565 struct i2c_client *client = to_i2c_client(dev);
566 struct asb100_data *data = i2c_get_clientdata(client);
567 unsigned long val = simple_strtoul(buf, NULL, 10);
568 data->pwm &= 0x80; /* keep the enable bit */
569 data->pwm |= (0x0f & ASB100_PWM_TO_REG(val));
570 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
574 static ssize_t show_pwm_enable1(struct device *dev, char *buf)
576 struct asb100_data *data = asb100_update_device(dev);
577 return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0);
580 static ssize_t set_pwm_enable1(struct device *dev, const char *buf,
583 struct i2c_client *client = to_i2c_client(dev);
584 struct asb100_data *data = i2c_get_clientdata(client);
585 unsigned long val = simple_strtoul(buf, NULL, 10);
586 data->pwm &= 0x0f; /* keep the duty cycle bits */
587 data->pwm |= (val ? 0x80 : 0x00);
588 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
592 static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1);
593 static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
594 show_pwm_enable1, set_pwm_enable1);
595 #define device_create_file_pwm1(client) do { \
596 device_create_file(&new_client->dev, &dev_attr_pwm1); \
597 device_create_file(&new_client->dev, &dev_attr_pwm1_enable); \
600 /* This function is called when:
601 asb100_driver is inserted (when this module is loaded), for each
603 when a new adapter is inserted (and asb100_driver is still present)
605 static int asb100_attach_adapter(struct i2c_adapter *adapter)
607 if (!(adapter->class & I2C_CLASS_HWMON))
609 return i2c_detect(adapter, &addr_data, asb100_detect);
612 static int asb100_detect_subclients(struct i2c_adapter *adapter, int address,
613 int kind, struct i2c_client *new_client)
616 struct asb100_data *data = i2c_get_clientdata(new_client);
618 data->lm75[0] = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
619 if (!(data->lm75[0])) {
623 memset(data->lm75[0], 0x00, sizeof(struct i2c_client));
625 data->lm75[1] = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
626 if (!(data->lm75[1])) {
630 memset(data->lm75[1], 0x00, sizeof(struct i2c_client));
632 id = i2c_adapter_id(adapter);
634 if (force_subclients[0] == id && force_subclients[1] == address) {
635 for (i = 2; i <= 3; i++) {
636 if (force_subclients[i] < 0x48 ||
637 force_subclients[i] > 0x4f) {
638 dev_err(&new_client->dev, "invalid subclient "
639 "address %d; must be 0x48-0x4f\n",
640 force_subclients[i]);
645 asb100_write_value(new_client, ASB100_REG_I2C_SUBADDR,
646 (force_subclients[2] & 0x07) |
647 ((force_subclients[3] & 0x07) <<4));
648 data->lm75[0]->addr = force_subclients[2];
649 data->lm75[1]->addr = force_subclients[3];
651 int val = asb100_read_value(new_client, ASB100_REG_I2C_SUBADDR);
652 data->lm75[0]->addr = 0x48 + (val & 0x07);
653 data->lm75[1]->addr = 0x48 + ((val >> 4) & 0x07);
656 if(data->lm75[0]->addr == data->lm75[1]->addr) {
657 dev_err(&new_client->dev, "duplicate addresses 0x%x "
658 "for subclients\n", data->lm75[0]->addr);
663 for (i = 0; i <= 1; i++) {
664 i2c_set_clientdata(data->lm75[i], NULL);
665 data->lm75[i]->adapter = adapter;
666 data->lm75[i]->driver = &asb100_driver;
667 data->lm75[i]->flags = 0;
668 strlcpy(data->lm75[i]->name, "asb100 subclient", I2C_NAME_SIZE);
671 if ((err = i2c_attach_client(data->lm75[0]))) {
672 dev_err(&new_client->dev, "subclient %d registration "
673 "at address 0x%x failed.\n", i, data->lm75[0]->addr);
677 if ((err = i2c_attach_client(data->lm75[1]))) {
678 dev_err(&new_client->dev, "subclient %d registration "
679 "at address 0x%x failed.\n", i, data->lm75[1]->addr);
685 /* Undo inits in case of errors */
687 i2c_detach_client(data->lm75[0]);
689 kfree(data->lm75[1]);
691 kfree(data->lm75[0]);
696 static int asb100_detect(struct i2c_adapter *adapter, int address, int kind)
699 struct i2c_client *new_client;
700 struct asb100_data *data;
702 /* asb100 is SMBus only */
703 if (i2c_is_isa_adapter(adapter)) {
704 pr_debug("asb100.o: detect failed, "
705 "cannot attach to legacy adapter!\n");
710 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
711 pr_debug("asb100.o: detect failed, "
712 "smbus byte data not supported!\n");
717 /* OK. For now, we presume we have a valid client. We now create the
718 client structure, even though we cannot fill it completely yet.
719 But it allows us to access asb100_{read,write}_value. */
721 if (!(data = kmalloc(sizeof(struct asb100_data), GFP_KERNEL))) {
722 pr_debug("asb100.o: detect failed, kmalloc failed!\n");
726 memset(data, 0, sizeof(struct asb100_data));
728 new_client = &data->client;
729 init_MUTEX(&data->lock);
730 i2c_set_clientdata(new_client, data);
731 new_client->addr = address;
732 new_client->adapter = adapter;
733 new_client->driver = &asb100_driver;
734 new_client->flags = 0;
736 /* Now, we do the remaining detection. */
738 /* The chip may be stuck in some other bank than bank 0. This may
739 make reading other information impossible. Specify a force=... or
740 force_*=... parameter, and the chip will be reset to the right
744 int val1 = asb100_read_value(new_client, ASB100_REG_BANK);
745 int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
747 /* If we're in bank 0 */
748 if ( (!(val1 & 0x07)) &&
749 /* Check for ASB100 ID (low byte) */
750 ( ((!(val1 & 0x80)) && (val2 != 0x94)) ||
751 /* Check for ASB100 ID (high byte ) */
752 ((val1 & 0x80) && (val2 != 0x06)) ) ) {
753 pr_debug("asb100.o: detect failed, "
754 "bad chip id 0x%02x!\n", val2);
761 /* We have either had a force parameter, or we have already detected
762 Winbond. Put it now into bank 0 and Vendor ID High Byte */
763 asb100_write_value(new_client, ASB100_REG_BANK,
764 (asb100_read_value(new_client, ASB100_REG_BANK) & 0x78) | 0x80);
766 /* Determine the chip type. */
768 int val1 = asb100_read_value(new_client, ASB100_REG_WCHIPID);
769 int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
771 if ((val1 == 0x31) && (val2 == 0x06))
775 dev_warn(&new_client->dev, "ignoring "
776 "'force' parameter for unknown chip "
777 "at adapter %d, address 0x%02x.\n",
778 i2c_adapter_id(adapter), address);
784 /* Fill in remaining client fields and put it into the global list */
785 strlcpy(new_client->name, "asb100", I2C_NAME_SIZE);
789 init_MUTEX(&data->update_lock);
791 /* Tell the I2C layer a new client has arrived */
792 if ((err = i2c_attach_client(new_client)))
795 /* Attach secondary lm75 clients */
796 if ((err = asb100_detect_subclients(adapter, address, kind,
800 /* Initialize the chip */
801 asb100_init_client(new_client);
803 /* A few vars need to be filled upon startup */
804 data->fan_min[0] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(0));
805 data->fan_min[1] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(1));
806 data->fan_min[2] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(2));
808 /* Register sysfs hooks */
809 device_create_file_in(new_client, 0);
810 device_create_file_in(new_client, 1);
811 device_create_file_in(new_client, 2);
812 device_create_file_in(new_client, 3);
813 device_create_file_in(new_client, 4);
814 device_create_file_in(new_client, 5);
815 device_create_file_in(new_client, 6);
817 device_create_file_fan(new_client, 1);
818 device_create_file_fan(new_client, 2);
819 device_create_file_fan(new_client, 3);
821 device_create_file_temp(new_client, 1);
822 device_create_file_temp(new_client, 2);
823 device_create_file_temp(new_client, 3);
824 device_create_file_temp(new_client, 4);
826 device_create_file_vid(new_client);
827 device_create_file_vrm(new_client);
829 device_create_file_alarms(new_client);
831 device_create_file_pwm1(new_client);
836 i2c_detach_client(new_client);
843 static int asb100_detach_client(struct i2c_client *client)
847 if ((err = i2c_detach_client(client))) {
848 dev_err(&client->dev, "client deregistration failed; "
849 "client not detached.\n");
853 if (i2c_get_clientdata(client)==NULL) {
858 kfree(i2c_get_clientdata(client));
864 /* The SMBus locks itself, usually, but nothing may access the chip between
866 static int asb100_read_value(struct i2c_client *client, u16 reg)
868 struct asb100_data *data = i2c_get_clientdata(client);
869 struct i2c_client *cl;
874 bank = (reg >> 8) & 0x0f;
877 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
879 if (bank == 0 || bank > 2) {
880 res = i2c_smbus_read_byte_data(client, reg & 0xff);
882 /* switch to subclient */
883 cl = data->lm75[bank - 1];
885 /* convert from ISA to LM75 I2C addresses */
886 switch (reg & 0xff) {
887 case 0x50: /* TEMP */
888 res = swab16(i2c_smbus_read_word_data (cl, 0));
890 case 0x52: /* CONFIG */
891 res = i2c_smbus_read_byte_data(cl, 1);
893 case 0x53: /* HYST */
894 res = swab16(i2c_smbus_read_word_data (cl, 2));
898 res = swab16(i2c_smbus_read_word_data (cl, 3));
904 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
911 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value)
913 struct asb100_data *data = i2c_get_clientdata(client);
914 struct i2c_client *cl;
919 bank = (reg >> 8) & 0x0f;
922 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
924 if (bank == 0 || bank > 2) {
925 i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff);
927 /* switch to subclient */
928 cl = data->lm75[bank - 1];
930 /* convert from ISA to LM75 I2C addresses */
931 switch (reg & 0xff) {
932 case 0x52: /* CONFIG */
933 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
935 case 0x53: /* HYST */
936 i2c_smbus_write_word_data(cl, 2, swab16(value));
939 i2c_smbus_write_word_data(cl, 3, swab16(value));
945 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
950 static void asb100_init_client(struct i2c_client *client)
952 struct asb100_data *data = i2c_get_clientdata(client);
955 vid = asb100_read_value(client, ASB100_REG_VID_FANDIV) & 0x0f;
956 vid |= (asb100_read_value(client, ASB100_REG_CHIPID) & 0x01) << 4;
957 data->vrm = i2c_which_vrm();
958 vid = vid_from_reg(vid, data->vrm);
960 /* Start monitoring */
961 asb100_write_value(client, ASB100_REG_CONFIG,
962 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01);
965 static struct asb100_data *asb100_update_device(struct device *dev)
967 struct i2c_client *client = to_i2c_client(dev);
968 struct asb100_data *data = i2c_get_clientdata(client);
971 down(&data->update_lock);
973 if (time_after(jiffies - data->last_updated, (unsigned long)(HZ+HZ/2))
974 || time_before(jiffies, data->last_updated) || !data->valid) {
976 dev_dbg(&client->dev, "starting device update...\n");
978 /* 7 voltage inputs */
979 for (i = 0; i < 7; i++) {
980 data->in[i] = asb100_read_value(client,
982 data->in_min[i] = asb100_read_value(client,
983 ASB100_REG_IN_MIN(i));
984 data->in_max[i] = asb100_read_value(client,
985 ASB100_REG_IN_MAX(i));
989 for (i = 0; i < 3; i++) {
990 data->fan[i] = asb100_read_value(client,
992 data->fan_min[i] = asb100_read_value(client,
993 ASB100_REG_FAN_MIN(i));
996 /* 4 temperature inputs */
997 for (i = 1; i <= 4; i++) {
998 data->temp[i-1] = asb100_read_value(client,
1000 data->temp_max[i-1] = asb100_read_value(client,
1001 ASB100_REG_TEMP_MAX(i));
1002 data->temp_hyst[i-1] = asb100_read_value(client,
1003 ASB100_REG_TEMP_HYST(i));
1006 /* VID and fan divisors */
1007 i = asb100_read_value(client, ASB100_REG_VID_FANDIV);
1008 data->vid = i & 0x0f;
1009 data->vid |= (asb100_read_value(client,
1010 ASB100_REG_CHIPID) & 0x01) << 4;
1011 data->fan_div[0] = (i >> 4) & 0x03;
1012 data->fan_div[1] = (i >> 6) & 0x03;
1013 data->fan_div[2] = (asb100_read_value(client,
1014 ASB100_REG_PIN) >> 6) & 0x03;
1017 data->pwm = asb100_read_value(client, ASB100_REG_PWM1);
1020 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) +
1021 (asb100_read_value(client, ASB100_REG_ALARM2) << 8);
1023 data->last_updated = jiffies;
1026 dev_dbg(&client->dev, "... device update complete\n");
1029 up(&data->update_lock);
1034 static int __init asb100_init(void)
1036 return i2c_add_driver(&asb100_driver);
1039 static void __exit asb100_exit(void)
1041 i2c_del_driver(&asb100_driver);
1044 MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
1045 MODULE_DESCRIPTION("ASB100 Bach driver");
1046 MODULE_LICENSE("GPL");
1048 module_init(asb100_init);
1049 module_exit(asb100_exit);