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[] = { I2C_CLIENT_END };
60 static unsigned short normal_i2c_range[] = { 0x28, 0x2f, I2C_CLIENT_END };
62 /* ISA addresses to scan (none) */
63 static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
64 static unsigned int normal_isa_range[] = { I2C_CLIENT_ISA_END };
66 /* Insmod parameters */
67 SENSORS_INSMOD_1(asb100);
68 I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
69 "{bus, clientaddr, subclientaddr1, subclientaddr2}");
71 /* Voltage IN registers 0-6 */
72 #define ASB100_REG_IN(nr) (0x20 + (nr))
73 #define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2))
74 #define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2))
76 /* FAN IN registers 1-3 */
77 #define ASB100_REG_FAN(nr) (0x28 + (nr))
78 #define ASB100_REG_FAN_MIN(nr) (0x3b + (nr))
80 /* TEMPERATURE registers 1-4 */
81 static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17};
82 static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18};
83 static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19};
85 #define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr])
86 #define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr])
87 #define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr])
89 #define ASB100_REG_TEMP2_CONFIG 0x0152
90 #define ASB100_REG_TEMP3_CONFIG 0x0252
93 #define ASB100_REG_CONFIG 0x40
94 #define ASB100_REG_ALARM1 0x41
95 #define ASB100_REG_ALARM2 0x42
96 #define ASB100_REG_SMIM1 0x43
97 #define ASB100_REG_SMIM2 0x44
98 #define ASB100_REG_VID_FANDIV 0x47
99 #define ASB100_REG_I2C_ADDR 0x48
100 #define ASB100_REG_CHIPID 0x49
101 #define ASB100_REG_I2C_SUBADDR 0x4a
102 #define ASB100_REG_PIN 0x4b
103 #define ASB100_REG_IRQ 0x4c
104 #define ASB100_REG_BANK 0x4e
105 #define ASB100_REG_CHIPMAN 0x4f
107 #define ASB100_REG_WCHIPID 0x58
109 /* bit 7 -> enable, bits 0-3 -> duty cycle */
110 #define ASB100_REG_PWM1 0x59
113 Rounding and limit checking is only done on the TO_REG variants. */
115 /* These constants are a guess, consistent w/ w83781d */
116 #define ASB100_IN_MIN ( 0)
117 #define ASB100_IN_MAX (4080)
119 /* IN: 1/1000 V (0V to 4.08V)
121 static u8 IN_TO_REG(unsigned val)
123 unsigned nval = SENSORS_LIMIT(val, ASB100_IN_MIN, ASB100_IN_MAX);
124 return (nval + 8) / 16;
127 static unsigned IN_FROM_REG(u8 reg)
132 static u8 FAN_TO_REG(long rpm, int div)
138 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
139 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
142 static int FAN_FROM_REG(u8 val, int div)
144 return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div);
147 /* These constants are a guess, consistent w/ w83781d */
148 #define ASB100_TEMP_MIN (-128000)
149 #define ASB100_TEMP_MAX ( 127000)
151 /* TEMP: 0.001C/bit (-128C to +127C)
152 REG: 1C/bit, two's complement */
153 static u8 TEMP_TO_REG(int temp)
155 int ntemp = SENSORS_LIMIT(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX);
156 ntemp += (ntemp<0 ? -500 : 500);
157 return (u8)(ntemp / 1000);
160 static int TEMP_FROM_REG(u8 reg)
162 return (s8)reg * 1000;
165 /* PWM: 0 - 255 per sensors documentation
166 REG: (6.25% duty cycle per bit) */
167 static u8 ASB100_PWM_TO_REG(int pwm)
169 pwm = SENSORS_LIMIT(pwm, 0, 255);
170 return (u8)(pwm / 16);
173 static int ASB100_PWM_FROM_REG(u8 reg)
178 #define ALARMS_FROM_REG(val) (val)
180 #define DIV_FROM_REG(val) (1 << (val))
182 /* FAN DIV: 1, 2, 4, or 8 (defaults to 2)
183 REG: 0, 1, 2, or 3 (respectively) (defaults to 1) */
184 static u8 DIV_TO_REG(long val)
186 return val==8 ? 3 : val==4 ? 2 : val==1 ? 0 : 1;
189 /* For each registered client, we need to keep some data in memory. That
190 data is pointed to by client->data. The structure itself is
191 dynamically allocated, at the same time the client itself is allocated. */
193 struct i2c_client client;
194 struct semaphore lock;
197 struct semaphore update_lock;
198 unsigned long last_updated; /* In jiffies */
200 /* array of 2 pointers to subclients */
201 struct i2c_client *lm75[2];
203 char valid; /* !=0 if following fields are valid */
204 u8 in[7]; /* Register value */
205 u8 in_max[7]; /* Register value */
206 u8 in_min[7]; /* Register value */
207 u8 fan[3]; /* Register value */
208 u8 fan_min[3]; /* Register value */
209 u16 temp[4]; /* Register value (0 and 3 are u8 only) */
210 u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */
211 u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */
212 u8 fan_div[3]; /* Register encoding, right justified */
213 u8 pwm; /* Register encoding */
214 u8 vid; /* Register encoding, combined */
215 u32 alarms; /* Register encoding, combined */
219 static int asb100_read_value(struct i2c_client *client, u16 reg);
220 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val);
222 static int asb100_attach_adapter(struct i2c_adapter *adapter);
223 static int asb100_detect(struct i2c_adapter *adapter, int address, int kind);
224 static int asb100_detach_client(struct i2c_client *client);
225 static struct asb100_data *asb100_update_device(struct device *dev);
226 static void asb100_init_client(struct i2c_client *client);
228 static struct i2c_driver asb100_driver = {
229 .owner = THIS_MODULE,
231 .id = I2C_DRIVERID_ASB100,
232 .flags = I2C_DF_NOTIFY,
233 .attach_adapter = asb100_attach_adapter,
234 .detach_client = asb100_detach_client,
238 #define show_in_reg(reg) \
239 static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
241 struct asb100_data *data = asb100_update_device(dev); \
242 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
249 #define set_in_reg(REG, reg) \
250 static ssize_t set_in_##reg(struct device *dev, const char *buf, \
251 size_t count, int nr) \
253 struct i2c_client *client = to_i2c_client(dev); \
254 struct asb100_data *data = i2c_get_clientdata(client); \
255 unsigned long val = simple_strtoul(buf, NULL, 10); \
256 data->in_##reg[nr] = IN_TO_REG(val); \
257 asb100_write_value(client, ASB100_REG_IN_##REG(nr), \
258 data->in_##reg[nr]); \
265 #define sysfs_in(offset) \
267 show_in##offset (struct device *dev, char *buf) \
269 return show_in(dev, buf, 0x##offset); \
271 static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
272 show_in##offset, NULL); \
274 show_in##offset##_min (struct device *dev, char *buf) \
276 return show_in_min(dev, buf, 0x##offset); \
279 show_in##offset##_max (struct device *dev, char *buf) \
281 return show_in_max(dev, buf, 0x##offset); \
283 static ssize_t set_in##offset##_min (struct device *dev, \
284 const char *buf, size_t count) \
286 return set_in_min(dev, buf, count, 0x##offset); \
288 static ssize_t set_in##offset##_max (struct device *dev, \
289 const char *buf, size_t count) \
291 return set_in_max(dev, buf, count, 0x##offset); \
293 static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
294 show_in##offset##_min, set_in##offset##_min); \
295 static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
296 show_in##offset##_max, set_in##offset##_max);
306 #define device_create_file_in(client, offset) do { \
307 device_create_file(&client->dev, &dev_attr_in##offset##_input); \
308 device_create_file(&client->dev, &dev_attr_in##offset##_min); \
309 device_create_file(&client->dev, &dev_attr_in##offset##_max); \
313 static ssize_t show_fan(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[nr],
317 DIV_FROM_REG(data->fan_div[nr])));
320 static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
322 struct asb100_data *data = asb100_update_device(dev);
323 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
324 DIV_FROM_REG(data->fan_div[nr])));
327 static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
329 struct asb100_data *data = asb100_update_device(dev);
330 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
333 static ssize_t set_fan_min(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);
338 u32 val = simple_strtoul(buf, NULL, 10);
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]);
344 /* Note: we save and restore the fan minimum here, because its value is
345 determined in part by the fan divisor. This follows the principle of
346 least suprise; the user doesn't expect the fan minimum to change just
347 because the divisor changed. */
348 static ssize_t set_fan_div(struct device *dev, const char *buf,
349 size_t count, int nr)
351 struct i2c_client *client = to_i2c_client(dev);
352 struct asb100_data *data = i2c_get_clientdata(client);
353 unsigned long min = FAN_FROM_REG(data->fan_min[nr],
354 DIV_FROM_REG(data->fan_div[nr]));
355 unsigned long val = simple_strtoul(buf, NULL, 10);
358 data->fan_div[nr] = DIV_TO_REG(val);
362 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
363 reg = (reg & 0xcf) | (data->fan_div[0] << 4);
364 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
368 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
369 reg = (reg & 0x3f) | (data->fan_div[1] << 6);
370 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
374 reg = asb100_read_value(client, ASB100_REG_PIN);
375 reg = (reg & 0x3f) | (data->fan_div[2] << 6);
376 asb100_write_value(client, ASB100_REG_PIN, reg);
381 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
382 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
386 #define sysfs_fan(offset) \
387 static ssize_t show_fan##offset(struct device *dev, char *buf) \
389 return show_fan(dev, buf, offset - 1); \
391 static ssize_t show_fan##offset##_min(struct device *dev, char *buf) \
393 return show_fan_min(dev, buf, offset - 1); \
395 static ssize_t show_fan##offset##_div(struct device *dev, char *buf) \
397 return show_fan_div(dev, buf, offset - 1); \
399 static ssize_t set_fan##offset##_min(struct device *dev, const char *buf, \
402 return set_fan_min(dev, buf, count, offset - 1); \
404 static ssize_t set_fan##offset##_div(struct device *dev, const char *buf, \
407 return set_fan_div(dev, buf, count, offset - 1); \
409 static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
410 show_fan##offset, NULL); \
411 static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
412 show_fan##offset##_min, set_fan##offset##_min); \
413 static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
414 show_fan##offset##_div, set_fan##offset##_div);
420 #define device_create_file_fan(client, offset) do { \
421 device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
422 device_create_file(&client->dev, &dev_attr_fan##offset##_min); \
423 device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
426 /* 4 Temp. Sensors */
427 static int sprintf_temp_from_reg(u16 reg, char *buf, int nr)
433 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg));
435 case 0: case 3: default:
436 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg));
442 #define show_temp_reg(reg) \
443 static ssize_t show_##reg(struct device *dev, char *buf, int nr) \
445 struct asb100_data *data = asb100_update_device(dev); \
446 return sprintf_temp_from_reg(data->reg[nr], buf, nr); \
450 show_temp_reg(temp_max);
451 show_temp_reg(temp_hyst);
453 #define set_temp_reg(REG, reg) \
454 static ssize_t set_##reg(struct device *dev, const char *buf, \
455 size_t count, int nr) \
457 struct i2c_client *client = to_i2c_client(dev); \
458 struct asb100_data *data = i2c_get_clientdata(client); \
459 unsigned long val = simple_strtoul(buf, NULL, 10); \
462 data->reg[nr] = LM75_TEMP_TO_REG(val); \
464 case 0: case 3: default: \
465 data->reg[nr] = TEMP_TO_REG(val); \
468 asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \
473 set_temp_reg(MAX, temp_max);
474 set_temp_reg(HYST, temp_hyst);
476 #define sysfs_temp(num) \
477 static ssize_t show_temp##num(struct device *dev, char *buf) \
479 return show_temp(dev, buf, num-1); \
481 static DEVICE_ATTR(temp##num##_input, S_IRUGO, show_temp##num, NULL); \
482 static ssize_t show_temp_max##num(struct device *dev, char *buf) \
484 return show_temp_max(dev, buf, num-1); \
486 static ssize_t set_temp_max##num(struct device *dev, const char *buf, \
489 return set_temp_max(dev, buf, count, num-1); \
491 static DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \
492 show_temp_max##num, set_temp_max##num); \
493 static ssize_t show_temp_hyst##num(struct device *dev, char *buf) \
495 return show_temp_hyst(dev, buf, num-1); \
497 static ssize_t set_temp_hyst##num(struct device *dev, const char *buf, \
500 return set_temp_hyst(dev, buf, count, num-1); \
502 static DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \
503 show_temp_hyst##num, set_temp_hyst##num);
511 #define device_create_file_temp(client, num) do { \
512 device_create_file(&client->dev, &dev_attr_temp##num##_input); \
513 device_create_file(&client->dev, &dev_attr_temp##num##_max); \
514 device_create_file(&client->dev, &dev_attr_temp##num##_max_hyst); \
517 static ssize_t show_vid(struct device *dev, char *buf)
519 struct asb100_data *data = asb100_update_device(dev);
520 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
523 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
524 #define device_create_file_vid(client) \
525 device_create_file(&client->dev, &dev_attr_cpu0_vid)
528 static ssize_t show_vrm(struct device *dev, char *buf)
530 struct asb100_data *data = asb100_update_device(dev);
531 return sprintf(buf, "%d\n", data->vrm);
534 static ssize_t set_vrm(struct device *dev, const char *buf, size_t count)
536 struct i2c_client *client = to_i2c_client(dev);
537 struct asb100_data *data = i2c_get_clientdata(client);
538 unsigned long val = simple_strtoul(buf, NULL, 10);
544 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
545 #define device_create_file_vrm(client) \
546 device_create_file(&client->dev, &dev_attr_vrm);
548 static ssize_t show_alarms(struct device *dev, char *buf)
550 struct asb100_data *data = asb100_update_device(dev);
551 return sprintf(buf, "%d\n", ALARMS_FROM_REG(data->alarms));
554 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
555 #define device_create_file_alarms(client) \
556 device_create_file(&client->dev, &dev_attr_alarms)
559 static ssize_t show_pwm1(struct device *dev, char *buf)
561 struct asb100_data *data = asb100_update_device(dev);
562 return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f));
565 static ssize_t set_pwm1(struct device *dev, const char *buf, size_t count)
567 struct i2c_client *client = to_i2c_client(dev);
568 struct asb100_data *data = i2c_get_clientdata(client);
569 unsigned long val = simple_strtoul(buf, NULL, 10);
570 data->pwm &= 0x80; /* keep the enable bit */
571 data->pwm |= (0x0f & ASB100_PWM_TO_REG(val));
572 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
576 static ssize_t show_pwm_enable1(struct device *dev, char *buf)
578 struct asb100_data *data = asb100_update_device(dev);
579 return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0);
582 static ssize_t set_pwm_enable1(struct device *dev, const char *buf,
585 struct i2c_client *client = to_i2c_client(dev);
586 struct asb100_data *data = i2c_get_clientdata(client);
587 unsigned long val = simple_strtoul(buf, NULL, 10);
588 data->pwm &= 0x0f; /* keep the duty cycle bits */
589 data->pwm |= (val ? 0x80 : 0x00);
590 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
594 static DEVICE_ATTR(fan1_pwm, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1);
595 static DEVICE_ATTR(fan1_pwm_enable, S_IRUGO | S_IWUSR,
596 show_pwm_enable1, set_pwm_enable1);
597 #define device_create_file_pwm1(client) do { \
598 device_create_file(&new_client->dev, &dev_attr_fan1_pwm); \
599 device_create_file(&new_client->dev, &dev_attr_fan1_pwm_enable); \
602 /* This function is called when:
603 asb100_driver is inserted (when this module is loaded), for each
605 when a new adapter is inserted (and asb100_driver is still present)
607 static int asb100_attach_adapter(struct i2c_adapter *adapter)
609 if (!(adapter->class & I2C_CLASS_HWMON))
611 return i2c_detect(adapter, &addr_data, asb100_detect);
614 static int asb100_detect_subclients(struct i2c_adapter *adapter, int address,
615 int kind, struct i2c_client *new_client)
618 struct asb100_data *data = i2c_get_clientdata(new_client);
620 data->lm75[0] = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
621 if (!(data->lm75[0])) {
625 memset(data->lm75[0], 0x00, sizeof(struct i2c_client));
627 data->lm75[1] = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
628 if (!(data->lm75[1])) {
632 memset(data->lm75[1], 0x00, sizeof(struct i2c_client));
634 id = i2c_adapter_id(adapter);
636 if (force_subclients[0] == id && force_subclients[1] == address) {
637 for (i = 2; i <= 3; i++) {
638 if (force_subclients[i] < 0x48 ||
639 force_subclients[i] > 0x4f) {
640 dev_err(&new_client->dev, "invalid subclient "
641 "address %d; must be 0x48-0x4f\n",
642 force_subclients[i]);
647 asb100_write_value(new_client, ASB100_REG_I2C_SUBADDR,
648 (force_subclients[2] & 0x07) |
649 ((force_subclients[3] & 0x07) <<4));
650 data->lm75[0]->addr = force_subclients[2];
651 data->lm75[1]->addr = force_subclients[3];
653 int val = asb100_read_value(new_client, ASB100_REG_I2C_SUBADDR);
654 data->lm75[0]->addr = 0x48 + (val & 0x07);
655 data->lm75[1]->addr = 0x48 + ((val >> 4) & 0x07);
658 if(data->lm75[0]->addr == data->lm75[1]->addr) {
659 dev_err(&new_client->dev, "duplicate addresses 0x%x "
660 "for subclients\n", data->lm75[0]->addr);
665 for (i = 0; i <= 1; i++) {
666 i2c_set_clientdata(data->lm75[i], NULL);
667 data->lm75[i]->adapter = adapter;
668 data->lm75[i]->driver = &asb100_driver;
669 data->lm75[i]->flags = 0;
670 strlcpy(data->lm75[i]->name, "asb100 subclient", I2C_NAME_SIZE);
673 if ((err = i2c_attach_client(data->lm75[0]))) {
674 dev_err(&new_client->dev, "subclient %d registration "
675 "at address 0x%x failed.\n", i, data->lm75[0]->addr);
679 if ((err = i2c_attach_client(data->lm75[1]))) {
680 dev_err(&new_client->dev, "subclient %d registration "
681 "at address 0x%x failed.\n", i, data->lm75[1]->addr);
687 /* Undo inits in case of errors */
689 i2c_detach_client(data->lm75[0]);
691 kfree(data->lm75[1]);
693 kfree(data->lm75[0]);
698 static int asb100_detect(struct i2c_adapter *adapter, int address, int kind)
701 struct i2c_client *new_client;
702 struct asb100_data *data;
704 /* asb100 is SMBus only */
705 if (i2c_is_isa_adapter(adapter)) {
706 pr_debug("asb100.o: detect failed, "
707 "cannot attach to legacy adapter!\n");
712 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
713 pr_debug("asb100.o: detect failed, "
714 "smbus byte data not supported!\n");
719 /* OK. For now, we presume we have a valid client. We now create the
720 client structure, even though we cannot fill it completely yet.
721 But it allows us to access asb100_{read,write}_value. */
723 if (!(data = kmalloc(sizeof(struct asb100_data), GFP_KERNEL))) {
724 pr_debug("asb100.o: detect failed, kmalloc failed!\n");
728 memset(data, 0, sizeof(struct asb100_data));
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 device_create_file_in(new_client, 0);
812 device_create_file_in(new_client, 1);
813 device_create_file_in(new_client, 2);
814 device_create_file_in(new_client, 3);
815 device_create_file_in(new_client, 4);
816 device_create_file_in(new_client, 5);
817 device_create_file_in(new_client, 6);
819 device_create_file_fan(new_client, 1);
820 device_create_file_fan(new_client, 2);
821 device_create_file_fan(new_client, 3);
823 device_create_file_temp(new_client, 1);
824 device_create_file_temp(new_client, 2);
825 device_create_file_temp(new_client, 3);
826 device_create_file_temp(new_client, 4);
828 device_create_file_vid(new_client);
829 device_create_file_vrm(new_client);
831 device_create_file_alarms(new_client);
833 device_create_file_pwm1(new_client);
838 i2c_detach_client(new_client);
845 static int asb100_detach_client(struct i2c_client *client)
849 if ((err = i2c_detach_client(client))) {
850 dev_err(&client->dev, "client deregistration failed; "
851 "client not detached.\n");
855 if (i2c_get_clientdata(client)==NULL) {
860 kfree(i2c_get_clientdata(client));
866 /* The SMBus locks itself, usually, but nothing may access the chip between
868 static int asb100_read_value(struct i2c_client *client, u16 reg)
870 struct asb100_data *data = i2c_get_clientdata(client);
871 struct i2c_client *cl;
876 bank = (reg >> 8) & 0x0f;
879 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
881 if (bank == 0 || bank > 2) {
882 res = i2c_smbus_read_byte_data(client, reg & 0xff);
884 /* switch to subclient */
885 cl = data->lm75[bank - 1];
887 /* convert from ISA to LM75 I2C addresses */
888 switch (reg & 0xff) {
889 case 0x50: /* TEMP */
890 res = swab16(i2c_smbus_read_word_data (cl, 0));
892 case 0x52: /* CONFIG */
893 res = i2c_smbus_read_byte_data(cl, 1);
895 case 0x53: /* HYST */
896 res = swab16(i2c_smbus_read_word_data (cl, 2));
900 res = swab16(i2c_smbus_read_word_data (cl, 3));
906 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
913 static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value)
915 struct asb100_data *data = i2c_get_clientdata(client);
916 struct i2c_client *cl;
921 bank = (reg >> 8) & 0x0f;
924 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
926 if (bank == 0 || bank > 2) {
927 i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff);
929 /* switch to subclient */
930 cl = data->lm75[bank - 1];
932 /* convert from ISA to LM75 I2C addresses */
933 switch (reg & 0xff) {
934 case 0x52: /* CONFIG */
935 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
937 case 0x53: /* HYST */
938 i2c_smbus_write_word_data(cl, 2, swab16(value));
941 i2c_smbus_write_word_data(cl, 3, swab16(value));
947 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
952 static void asb100_init_client(struct i2c_client *client)
954 struct asb100_data *data = i2c_get_clientdata(client);
957 vid = asb100_read_value(client, ASB100_REG_VID_FANDIV) & 0x0f;
958 vid |= (asb100_read_value(client, ASB100_REG_CHIPID) & 0x01) << 4;
959 data->vrm = i2c_which_vrm();
960 vid = vid_from_reg(vid, data->vrm);
962 /* Start monitoring */
963 asb100_write_value(client, ASB100_REG_CONFIG,
964 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01);
967 static struct asb100_data *asb100_update_device(struct device *dev)
969 struct i2c_client *client = to_i2c_client(dev);
970 struct asb100_data *data = i2c_get_clientdata(client);
973 down(&data->update_lock);
975 if (time_after(jiffies - data->last_updated, (unsigned long)(HZ+HZ/2))
976 || time_before(jiffies, data->last_updated) || !data->valid) {
978 dev_dbg(&client->dev, "starting device update...\n");
980 /* 7 voltage inputs */
981 for (i = 0; i < 7; i++) {
982 data->in[i] = asb100_read_value(client,
984 data->in_min[i] = asb100_read_value(client,
985 ASB100_REG_IN_MIN(i));
986 data->in_max[i] = asb100_read_value(client,
987 ASB100_REG_IN_MAX(i));
991 for (i = 0; i < 3; i++) {
992 data->fan[i] = asb100_read_value(client,
994 data->fan_min[i] = asb100_read_value(client,
995 ASB100_REG_FAN_MIN(i));
998 /* 4 temperature inputs */
999 for (i = 1; i <= 4; i++) {
1000 data->temp[i-1] = asb100_read_value(client,
1001 ASB100_REG_TEMP(i));
1002 data->temp_max[i-1] = asb100_read_value(client,
1003 ASB100_REG_TEMP_MAX(i));
1004 data->temp_hyst[i-1] = asb100_read_value(client,
1005 ASB100_REG_TEMP_HYST(i));
1008 /* VID and fan divisors */
1009 i = asb100_read_value(client, ASB100_REG_VID_FANDIV);
1010 data->vid = i & 0x0f;
1011 data->vid |= (asb100_read_value(client,
1012 ASB100_REG_CHIPID) & 0x01) << 4;
1013 data->fan_div[0] = (i >> 4) & 0x03;
1014 data->fan_div[1] = (i >> 6) & 0x03;
1015 data->fan_div[2] = (asb100_read_value(client,
1016 ASB100_REG_PIN) >> 6) & 0x03;
1019 data->pwm = asb100_read_value(client, ASB100_REG_PWM1);
1022 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) +
1023 (asb100_read_value(client, ASB100_REG_ALARM2) << 8);
1025 data->last_updated = jiffies;
1028 dev_dbg(&client->dev, "... device update complete\n");
1031 up(&data->update_lock);
1036 static int __init asb100_init(void)
1038 return i2c_add_driver(&asb100_driver);
1041 static void __exit asb100_exit(void)
1043 i2c_del_driver(&asb100_driver);
1046 MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
1047 MODULE_DESCRIPTION("ASB100 Bach driver");
1048 MODULE_LICENSE("GPL");
1050 module_init(asb100_init);
1051 module_exit(asb100_exit);