projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
hwmon: (sht15) avoid CamelCase
[linux-2.6-block.git] / drivers / hwmon / asb100.c
CommitLineData
1da177e4 1/*
8c103696
GR		 2 * asb100.c - Part of lm_sensors, Linux kernel modules for hardware
3 * monitoring
4 *
5 * Copyright (C) 2004 Mark M. Hoffman <mhoffman@lightlink.com>
6 *
7 * (derived from w83781d.c)
8 *
9 * Copyright (C) 1998 - 2003 Frodo Looijaard <frodol@dds.nl>,
10 * Philip Edelbrock <phil@netroedge.com>, and
11 * Mark Studebaker <mdsxyz123@yahoo.com>
12 *
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.
17 *
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.
22 *
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.
26 */
1da177e4
LT		 27
28/*
8c103696
GR		 29 * This driver supports the hardware sensor chips: Asus ASB100 and
30 * ASB100-A "BACH".
31 *
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.
34 *
4101ece3 35 * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
8c103696
GR		 36 * asb100 7 3 1 4 0x31 0x0694 yes no
37 */
1da177e4 38
4d630e2b
JP		 39#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
40
1da177e4
LT		 41#include <linux/module.h>
42#include <linux/slab.h>
43#include <linux/i2c.h>
943b0830 44#include <linux/hwmon.h>
fad33c5f 45#include <linux/hwmon-sysfs.h>
303760b4 46#include <linux/hwmon-vid.h>
943b0830 47#include <linux/err.h>
1da177e4 48#include <linux/init.h>
ff324094 49#include <linux/jiffies.h>
9a61bf63 50#include <linux/mutex.h>
1da177e4
LT		 51#include "lm75.h"
52
1da177e4 53/* I2C addresses to scan */
25e9c86d 54static const unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END };
1da177e4 55
3aed198c
JD		 56static unsigned short force_subclients[4];
57module_param_array(force_subclients, short, NULL, 0);
58MODULE_PARM_DESC(force_subclients, "List of subclient addresses: "
1da177e4
LT		 59 "{bus, clientaddr, subclientaddr1, subclientaddr2}");
60
61/* Voltage IN registers 0-6 */
62#define ASB100_REG_IN(nr) (0x20 + (nr))
63#define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2))
64#define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2))
65
66/* FAN IN registers 1-3 */
67#define ASB100_REG_FAN(nr) (0x28 + (nr))
68#define ASB100_REG_FAN_MIN(nr) (0x3b + (nr))
69
70/* TEMPERATURE registers 1-4 */
71static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17};
72static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18};
73static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19};
74
75#define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr])
76#define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr])
77#define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr])
78
79#define ASB100_REG_TEMP2_CONFIG 0x0152
80#define ASB100_REG_TEMP3_CONFIG 0x0252
81
82
83#define ASB100_REG_CONFIG 0x40
84#define ASB100_REG_ALARM1 0x41
85#define ASB100_REG_ALARM2 0x42
86#define ASB100_REG_SMIM1 0x43
87#define ASB100_REG_SMIM2 0x44
88#define ASB100_REG_VID_FANDIV 0x47
89#define ASB100_REG_I2C_ADDR 0x48
90#define ASB100_REG_CHIPID 0x49
91#define ASB100_REG_I2C_SUBADDR 0x4a
92#define ASB100_REG_PIN 0x4b
93#define ASB100_REG_IRQ 0x4c
94#define ASB100_REG_BANK 0x4e
95#define ASB100_REG_CHIPMAN 0x4f
96
97#define ASB100_REG_WCHIPID 0x58
98
99/* bit 7 -> enable, bits 0-3 -> duty cycle */
100#define ASB100_REG_PWM1 0x59
101
8c103696
GR		 102/*
103 * CONVERSIONS
104 * Rounding and limit checking is only done on the TO_REG variants.
105 */
1da177e4
LT		 106
107/* These constants are a guess, consistent w/ w83781d */
8c103696
GR		 108#define ASB100_IN_MIN 0
109#define ASB100_IN_MAX 4080
1da177e4 110
8c103696
GR		 111/*
112 * IN: 1/1000 V (0V to 4.08V)
113 * REG: 16mV/bit
114 */
1da177e4
LT		 115static u8 IN_TO_REG(unsigned val)
116{
117 unsigned nval = SENSORS_LIMIT(val, ASB100_IN_MIN, ASB100_IN_MAX);
118 return (nval + 8) / 16;
119}
120
121static unsigned IN_FROM_REG(u8 reg)
122{
123 return reg * 16;
124}
125
126static u8 FAN_TO_REG(long rpm, int div)
127{
128 if (rpm == -1)
129 return 0;
130 if (rpm == 0)
131 return 255;
132 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
133 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
134}
135
136static int FAN_FROM_REG(u8 val, int div)
137{
8c103696 138 return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
1da177e4
LT		 139}
140
141/* These constants are a guess, consistent w/ w83781d */
8c103696
GR		 142#define ASB100_TEMP_MIN -128000
143#define ASB100_TEMP_MAX 127000
1da177e4 144
8c103696
GR		 145/*
146 * TEMP: 0.001C/bit (-128C to +127C)
147 * REG: 1C/bit, two's complement
148 */
5bfedac0 149static u8 TEMP_TO_REG(long temp)
1da177e4
LT		 150{
151 int ntemp = SENSORS_LIMIT(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX);
8c103696 152 ntemp += (ntemp < 0 ? -500 : 500);
1da177e4
LT		 153 return (u8)(ntemp / 1000);
154}
155
156static int TEMP_FROM_REG(u8 reg)
157{
158 return (s8)reg * 1000;
159}
160
8c103696
GR		 161/*
162 * PWM: 0 - 255 per sensors documentation
163 * REG: (6.25% duty cycle per bit)
164 */
1da177e4
LT		 165static u8 ASB100_PWM_TO_REG(int pwm)
166{
167 pwm = SENSORS_LIMIT(pwm, 0, 255);
168 return (u8)(pwm / 16);
169}
170
171static int ASB100_PWM_FROM_REG(u8 reg)
172{
173 return reg * 16;
174}
175
1da177e4
LT		 176#define DIV_FROM_REG(val) (1 << (val))
177
8c103696
GR		 178/*
179 * FAN DIV: 1, 2, 4, or 8 (defaults to 2)
180 * REG: 0, 1, 2, or 3 (respectively) (defaults to 1)
181 */
1da177e4
LT		 182static u8 DIV_TO_REG(long val)
183{
8c103696 184 return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1;
1da177e4
LT		 185}
186
8c103696
GR		 187/*
188 * For each registered client, we need to keep some data in memory. That
189 * data is pointed to by client->data. The structure itself is
190 * dynamically allocated, at the same time the client itself is allocated.
191 */
1da177e4 192struct asb100_data {
1beeffe4 193 struct device *hwmon_dev;
9a61bf63 194 struct mutex lock;
1da177e4 195
9a61bf63 196 struct mutex update_lock;
1da177e4
LT		 197 unsigned long last_updated; /* In jiffies */
198
199 /* array of 2 pointers to subclients */
200 struct i2c_client *lm75[2];
201
202 char valid; /* !=0 if following fields are valid */
203 u8 in[7]; /* Register value */
204 u8 in_max[7]; /* Register value */
205 u8 in_min[7]; /* Register value */
206 u8 fan[3]; /* Register value */
207 u8 fan_min[3]; /* Register value */
208 u16 temp[4]; /* Register value (0 and 3 are u8 only) */
209 u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */
210 u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */
211 u8 fan_div[3]; /* Register encoding, right justified */
212 u8 pwm; /* Register encoding */
213 u8 vid; /* Register encoding, combined */
214 u32 alarms; /* Register encoding, combined */
215 u8 vrm;
216};
217
218static int asb100_read_value(struct i2c_client *client, u16 reg);
219static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val);
220
063675b1
JD		 221static int asb100_probe(struct i2c_client *client,
222 const struct i2c_device_id *id);
310ec792 223static int asb100_detect(struct i2c_client *client,
063675b1
JD		 224 struct i2c_board_info *info);
225static int asb100_remove(struct i2c_client *client);
1da177e4
LT		 226static struct asb100_data *asb100_update_device(struct device *dev);
227static void asb100_init_client(struct i2c_client *client);
228
063675b1 229static const struct i2c_device_id asb100_id[] = {
1f86df49 230 { "asb100", 0 },
063675b1
JD		 231 { }
232};
233MODULE_DEVICE_TABLE(i2c, asb100_id);
234
1da177e4 235static struct i2c_driver asb100_driver = {
063675b1 236 .class = I2C_CLASS_HWMON,
cdaf7934 237 .driver = {
cdaf7934
LR		 238 .name = "asb100",
239 },
063675b1
JD		 240 .probe = asb100_probe,
241 .remove = asb100_remove,
242 .id_table = asb100_id,
243 .detect = asb100_detect,
c3813d6a 244 .address_list = normal_i2c,
1da177e4
LT		 245};
246
247/* 7 Voltages */
248#define show_in_reg(reg) \
fad33c5f
JD		 249static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
250 char *buf) \
1da177e4 251{ \
fad33c5f 252 int nr = to_sensor_dev_attr(attr)->index; \
1da177e4
LT		 253 struct asb100_data *data = asb100_update_device(dev); \
254 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
255}
256
257show_in_reg(in)
258show_in_reg(in_min)
259show_in_reg(in_max)
260
261#define set_in_reg(REG, reg) \
fad33c5f
JD		 262static ssize_t set_in_##reg(struct device *dev, struct device_attribute *attr, \
263 const char *buf, size_t count) \
1da177e4 264{ \
fad33c5f 265 int nr = to_sensor_dev_attr(attr)->index; \
1da177e4
LT		 266 struct i2c_client *client = to_i2c_client(dev); \
267 struct asb100_data *data = i2c_get_clientdata(client); \
8c103696
GR		 268 unsigned long val; \
269 int err = kstrtoul(buf, 10, &val); \
270 if (err) \
271 return err; \
9a61bf63 272 mutex_lock(&data->update_lock); \
1da177e4
LT		 273 data->in_##reg[nr] = IN_TO_REG(val); \
274 asb100_write_value(client, ASB100_REG_IN_##REG(nr), \
275 data->in_##reg[nr]); \
9a61bf63 276 mutex_unlock(&data->update_lock); \
1da177e4
LT		 277 return count; \
278}
279
280set_in_reg(MIN, min)
281set_in_reg(MAX, max)
282
283#define sysfs_in(offset) \
fad33c5f
JD		 284static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
285 show_in, NULL, offset); \
286static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
287 show_in_min, set_in_min, offset); \
288static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
289 show_in_max, set_in_max, offset)
1da177e4
LT		 290
291sysfs_in(0);
292sysfs_in(1);
293sysfs_in(2);
294sysfs_in(3);
295sysfs_in(4);
296sysfs_in(5);
297sysfs_in(6);
298
1da177e4 299/* 3 Fans */
fad33c5f
JD		 300static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
301 char *buf)
1da177e4 302{
fad33c5f 303 int nr = to_sensor_dev_attr(attr)->index;
1da177e4
LT		 304 struct asb100_data *data = asb100_update_device(dev);
305 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
306 DIV_FROM_REG(data->fan_div[nr])));
307}
308
fad33c5f
JD		 309static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
310 char *buf)
1da177e4 311{
fad33c5f 312 int nr = to_sensor_dev_attr(attr)->index;
1da177e4
LT		 313 struct asb100_data *data = asb100_update_device(dev);
314 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
315 DIV_FROM_REG(data->fan_div[nr])));
316}
317
fad33c5f
JD		 318static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
319 char *buf)
1da177e4 320{
fad33c5f 321 int nr = to_sensor_dev_attr(attr)->index;
1da177e4
LT		 322 struct asb100_data *data = asb100_update_device(dev);
323 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
324}
325
fad33c5f
JD		 326static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
327 const char *buf, size_t count)
1da177e4 328{
fad33c5f 329 int nr = to_sensor_dev_attr(attr)->index;
1da177e4
LT		 330 struct i2c_client *client = to_i2c_client(dev);
331 struct asb100_data *data = i2c_get_clientdata(client);
8c103696
GR		 332 unsigned long val;
333 int err;
334
335 err = kstrtoul(buf, 10, &val);
336 if (err)
337 return err;
1da177e4 338
9a61bf63 339 mutex_lock(&data->update_lock);
1da177e4
LT		 340 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
341 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
9a61bf63 342 mutex_unlock(&data->update_lock);
1da177e4
LT		 343 return count;
344}
345
8c103696
GR		 346/*
347 * Note: we save and restore the fan minimum here, because its value is
348 * determined in part by the fan divisor. This follows the principle of
349 * least surprise; the user doesn't expect the fan minimum to change just
350 * because the divisor changed.
351 */
fad33c5f
JD		 352static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
353 const char *buf, size_t count)
1da177e4 354{
fad33c5f 355 int nr = to_sensor_dev_attr(attr)->index;
1da177e4
LT		 356 struct i2c_client *client = to_i2c_client(dev);
357 struct asb100_data *data = i2c_get_clientdata(client);
358 unsigned long min;
1da177e4 359 int reg;
8c103696
GR		 360 unsigned long val;
361 int err;
362
363 err = kstrtoul(buf, 10, &val);
364 if (err)
365 return err;
af221931 366
9a61bf63 367 mutex_lock(&data->update_lock);
1da177e4
LT		 368
369 min = FAN_FROM_REG(data->fan_min[nr],
370 DIV_FROM_REG(data->fan_div[nr]));
371 data->fan_div[nr] = DIV_TO_REG(val);
372
af221931 373 switch (nr) {
1da177e4
LT		 374 case 0: /* fan 1 */
375 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
376 reg = (reg & 0xcf) | (data->fan_div[0] << 4);
377 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
378 break;
379
380 case 1: /* fan 2 */
381 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
382 reg = (reg & 0x3f) | (data->fan_div[1] << 6);
383 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
384 break;
385
386 case 2: /* fan 3 */
387 reg = asb100_read_value(client, ASB100_REG_PIN);
388 reg = (reg & 0x3f) | (data->fan_div[2] << 6);
389 asb100_write_value(client, ASB100_REG_PIN, reg);
390 break;
391 }
392
393 data->fan_min[nr] =
394 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
395 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
396
9a61bf63 397 mutex_unlock(&data->update_lock);
1da177e4
LT		 398
399 return count;
400}
401
402#define sysfs_fan(offset) \
fad33c5f
JD		 403static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
404 show_fan, NULL, offset - 1); \
405static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
406 show_fan_min, set_fan_min, offset - 1); \
407static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
408 show_fan_div, set_fan_div, offset - 1)
1da177e4
LT		 409
410sysfs_fan(1);
411sysfs_fan(2);
412sysfs_fan(3);
413
1da177e4
LT		 414/* 4 Temp. Sensors */
415static int sprintf_temp_from_reg(u16 reg, char *buf, int nr)
416{
417 int ret = 0;
418
419 switch (nr) {
420 case 1: case 2:
421 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg));
422 break;
423 case 0: case 3: default:
424 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg));
425 break;
426 }
427 return ret;
428}
af221931 429
1da177e4 430#define show_temp_reg(reg) \
fad33c5f
JD		 431static ssize_t show_##reg(struct device *dev, struct device_attribute *attr, \
432 char *buf) \
1da177e4 433{ \
fad33c5f 434 int nr = to_sensor_dev_attr(attr)->index; \
1da177e4
LT		 435 struct asb100_data *data = asb100_update_device(dev); \
436 return sprintf_temp_from_reg(data->reg[nr], buf, nr); \
437}
438
439show_temp_reg(temp);
440show_temp_reg(temp_max);
441show_temp_reg(temp_hyst);
442
443#define set_temp_reg(REG, reg) \
fad33c5f
JD		 444static ssize_t set_##reg(struct device *dev, struct device_attribute *attr, \
445 const char *buf, size_t count) \
1da177e4 446{ \
fad33c5f 447 int nr = to_sensor_dev_attr(attr)->index; \
1da177e4
LT		 448 struct i2c_client *client = to_i2c_client(dev); \
449 struct asb100_data *data = i2c_get_clientdata(client); \
8c103696
GR		 450 long val; \
451 int err = kstrtol(buf, 10, &val); \
452 if (err) \
453 return err; \
9a61bf63 454 mutex_lock(&data->update_lock); \
1da177e4
LT		 455 switch (nr) { \
456 case 1: case 2: \
457 data->reg[nr] = LM75_TEMP_TO_REG(val); \
458 break; \
459 case 0: case 3: default: \
460 data->reg[nr] = TEMP_TO_REG(val); \
461 break; \
462 } \
463 asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \
464 data->reg[nr]); \
9a61bf63 465 mutex_unlock(&data->update_lock); \
1da177e4
LT		 466 return count; \
467}
468
469set_temp_reg(MAX, temp_max);
470set_temp_reg(HYST, temp_hyst);
471
472#define sysfs_temp(num) \
fad33c5f
JD		 473static SENSOR_DEVICE_ATTR(temp##num##_input, S_IRUGO, \
474 show_temp, NULL, num - 1); \
475static SENSOR_DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \
476 show_temp_max, set_temp_max, num - 1); \
477static SENSOR_DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \
478 show_temp_hyst, set_temp_hyst, num - 1)
1da177e4
LT		 479
480sysfs_temp(1);
481sysfs_temp(2);
482sysfs_temp(3);
483sysfs_temp(4);
484
485/* VID */
af221931
JD		 486static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
487 char *buf)
1da177e4
LT		 488{
489 struct asb100_data *data = asb100_update_device(dev);
490 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
491}
492
493static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
1da177e4
LT		 494
495/* VRM */
af221931
JD		 496static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
497 char *buf)
1da177e4 498{
90d6619a 499 struct asb100_data *data = dev_get_drvdata(dev);
1da177e4
LT		 500 return sprintf(buf, "%d\n", data->vrm);
501}
502
af221931
JD		 503static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
504 const char *buf, size_t count)
1da177e4 505{
8f74efe8 506 struct asb100_data *data = dev_get_drvdata(dev);
8c103696
GR		 507 unsigned long val;
508 int err;
509
510 err = kstrtoul(buf, 10, &val);
511 if (err)
512 return err;
513 data->vrm = val;
1da177e4
LT		 514 return count;
515}
516
517/* Alarms */
518static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
1da177e4 519
af221931
JD		 520static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
521 char *buf)
1da177e4
LT		 522{
523 struct asb100_data *data = asb100_update_device(dev);
68188ba7 524 return sprintf(buf, "%u\n", data->alarms);
1da177e4
LT		 525}
526
527static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1da177e4 528
636866b9
JD		 529static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
530 char *buf)
531{
532 int bitnr = to_sensor_dev_attr(attr)->index;
533 struct asb100_data *data = asb100_update_device(dev);
534 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
535}
536static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0);
537static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1);
538static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2);
539static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3);
540static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8);
541static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 6);
542static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 7);
543static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 11);
544static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 4);
545static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
546static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 13);
547
1da177e4 548/* 1 PWM */
af221931
JD		 549static ssize_t show_pwm1(struct device *dev, struct device_attribute *attr,
550 char *buf)
1da177e4
LT		 551{
552 struct asb100_data *data = asb100_update_device(dev);
553 return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f));
554}
555
af221931
JD		 556static ssize_t set_pwm1(struct device *dev, struct device_attribute *attr,
557 const char *buf, size_t count)
1da177e4
LT		 558{
559 struct i2c_client *client = to_i2c_client(dev);
560 struct asb100_data *data = i2c_get_clientdata(client);
8c103696
GR		 561 unsigned long val;
562 int err;
563
564 err = kstrtoul(buf, 10, &val);
565 if (err)
566 return err;
1da177e4 567
9a61bf63 568 mutex_lock(&data->update_lock);
1da177e4
LT		 569 data->pwm &= 0x80; /* keep the enable bit */
570 data->pwm |= (0x0f & ASB100_PWM_TO_REG(val));
571 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
9a61bf63 572 mutex_unlock(&data->update_lock);
1da177e4
LT		 573 return count;
574}
575
af221931
JD		 576static ssize_t show_pwm_enable1(struct device *dev,
577 struct device_attribute *attr, char *buf)
1da177e4
LT		 578{
579 struct asb100_data *data = asb100_update_device(dev);
580 return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0);
581}
582
af221931
JD		 583static ssize_t set_pwm_enable1(struct device *dev,
584 struct device_attribute *attr, const char *buf, size_t count)
1da177e4
LT		 585{
586 struct i2c_client *client = to_i2c_client(dev);
587 struct asb100_data *data = i2c_get_clientdata(client);
8c103696
GR		 588 unsigned long val;
589 int err;
590
591 err = kstrtoul(buf, 10, &val);
592 if (err)
593 return err;
1da177e4 594
9a61bf63 595 mutex_lock(&data->update_lock);
1da177e4
LT		 596 data->pwm &= 0x0f; /* keep the duty cycle bits */
597 data->pwm |= (val ? 0x80 : 0x00);
598 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
9a61bf63 599 mutex_unlock(&data->update_lock);
1da177e4
LT		 600 return count;
601}
602
603static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1);
604static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
605 show_pwm_enable1, set_pwm_enable1);
c1685f61
MH		 606
607static struct attribute *asb100_attributes[] = {
fad33c5f
JD		 608 &sensor_dev_attr_in0_input.dev_attr.attr,
609 &sensor_dev_attr_in0_min.dev_attr.attr,
610 &sensor_dev_attr_in0_max.dev_attr.attr,
611 &sensor_dev_attr_in1_input.dev_attr.attr,
612 &sensor_dev_attr_in1_min.dev_attr.attr,
613 &sensor_dev_attr_in1_max.dev_attr.attr,
614 &sensor_dev_attr_in2_input.dev_attr.attr,
615 &sensor_dev_attr_in2_min.dev_attr.attr,
616 &sensor_dev_attr_in2_max.dev_attr.attr,
617 &sensor_dev_attr_in3_input.dev_attr.attr,
618 &sensor_dev_attr_in3_min.dev_attr.attr,
619 &sensor_dev_attr_in3_max.dev_attr.attr,
620 &sensor_dev_attr_in4_input.dev_attr.attr,
621 &sensor_dev_attr_in4_min.dev_attr.attr,
622 &sensor_dev_attr_in4_max.dev_attr.attr,
623 &sensor_dev_attr_in5_input.dev_attr.attr,
624 &sensor_dev_attr_in5_min.dev_attr.attr,
625 &sensor_dev_attr_in5_max.dev_attr.attr,
626 &sensor_dev_attr_in6_input.dev_attr.attr,
627 &sensor_dev_attr_in6_min.dev_attr.attr,
628 &sensor_dev_attr_in6_max.dev_attr.attr,
629
630 &sensor_dev_attr_fan1_input.dev_attr.attr,
631 &sensor_dev_attr_fan1_min.dev_attr.attr,
632 &sensor_dev_attr_fan1_div.dev_attr.attr,
633 &sensor_dev_attr_fan2_input.dev_attr.attr,
634 &sensor_dev_attr_fan2_min.dev_attr.attr,
635 &sensor_dev_attr_fan2_div.dev_attr.attr,
636 &sensor_dev_attr_fan3_input.dev_attr.attr,
637 &sensor_dev_attr_fan3_min.dev_attr.attr,
638 &sensor_dev_attr_fan3_div.dev_attr.attr,
639
640 &sensor_dev_attr_temp1_input.dev_attr.attr,
641 &sensor_dev_attr_temp1_max.dev_attr.attr,
642 &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
643 &sensor_dev_attr_temp2_input.dev_attr.attr,
644 &sensor_dev_attr_temp2_max.dev_attr.attr,
645 &sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
646 &sensor_dev_attr_temp3_input.dev_attr.attr,
647 &sensor_dev_attr_temp3_max.dev_attr.attr,
648 &sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
649 &sensor_dev_attr_temp4_input.dev_attr.attr,
650 &sensor_dev_attr_temp4_max.dev_attr.attr,
651 &sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
c1685f61 652
636866b9
JD		 653 &sensor_dev_attr_in0_alarm.dev_attr.attr,
654 &sensor_dev_attr_in1_alarm.dev_attr.attr,
655 &sensor_dev_attr_in2_alarm.dev_attr.attr,
656 &sensor_dev_attr_in3_alarm.dev_attr.attr,
657 &sensor_dev_attr_in4_alarm.dev_attr.attr,
658 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
659 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
660 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
661 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
662 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
663 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
664
c1685f61
MH		 665 &dev_attr_cpu0_vid.attr,
666 &dev_attr_vrm.attr,
667 &dev_attr_alarms.attr,
668 &dev_attr_pwm1.attr,
669 &dev_attr_pwm1_enable.attr,
670
671 NULL
672};
673
674static const struct attribute_group asb100_group = {
675 .attrs = asb100_attributes,
676};
1da177e4 677
063675b1 678static int asb100_detect_subclients(struct i2c_client *client)
1da177e4
LT		 679{
680 int i, id, err;
063675b1
JD		 681 int address = client->addr;
682 unsigned short sc_addr[2];
af221931 683 struct asb100_data *data = i2c_get_clientdata(client);
063675b1 684 struct i2c_adapter *adapter = client->adapter;
1da177e4
LT		 685
686 id = i2c_adapter_id(adapter);
687
688 if (force_subclients[0] == id && force_subclients[1] == address) {
689 for (i = 2; i <= 3; i++) {
690 if (force_subclients[i] < 0x48 ||
691 force_subclients[i] > 0x4f) {
af221931 692 dev_err(&client->dev, "invalid subclient "
1da177e4
LT		 693 "address %d; must be 0x48-0x4f\n",
694 force_subclients[i]);
695 err = -ENODEV;
696 goto ERROR_SC_2;
697 }
698 }
af221931 699 asb100_write_value(client, ASB100_REG_I2C_SUBADDR,
1da177e4 700 (force_subclients[2] & 0x07) |
af221931 701 ((force_subclients[3] & 0x07) << 4));
063675b1
JD		 702 sc_addr[0] = force_subclients[2];
703 sc_addr[1] = force_subclients[3];
1da177e4 704 } else {
af221931 705 int val = asb100_read_value(client, ASB100_REG_I2C_SUBADDR);
063675b1
JD		 706 sc_addr[0] = 0x48 + (val & 0x07);
707 sc_addr[1] = 0x48 + ((val >> 4) & 0x07);
1da177e4
LT		 708 }
709
063675b1 710 if (sc_addr[0] == sc_addr[1]) {
af221931 711 dev_err(&client->dev, "duplicate addresses 0x%x "
063675b1 712 "for subclients\n", sc_addr[0]);
1da177e4
LT		 713 err = -ENODEV;
714 goto ERROR_SC_2;
715 }
716
063675b1
JD		 717 data->lm75[0] = i2c_new_dummy(adapter, sc_addr[0]);
718 if (!data->lm75[0]) {
af221931 719 dev_err(&client->dev, "subclient %d registration "
063675b1
JD		 720 "at address 0x%x failed.\n", 1, sc_addr[0]);
721 err = -ENOMEM;
1da177e4
LT		 722 goto ERROR_SC_2;
723 }
724
063675b1
JD		 725 data->lm75[1] = i2c_new_dummy(adapter, sc_addr[1]);
726 if (!data->lm75[1]) {
af221931 727 dev_err(&client->dev, "subclient %d registration "
063675b1
JD		 728 "at address 0x%x failed.\n", 2, sc_addr[1]);
729 err = -ENOMEM;
1da177e4
LT		 730 goto ERROR_SC_3;
731 }
732
733 return 0;
734
735/* Undo inits in case of errors */
736ERROR_SC_3:
063675b1 737 i2c_unregister_device(data->lm75[0]);
1da177e4 738ERROR_SC_2:
1da177e4
LT		 739 return err;
740}
741
063675b1 742/* Return 0 if detection is successful, -ENODEV otherwise */
310ec792 743static int asb100_detect(struct i2c_client *client,
063675b1 744 struct i2c_board_info *info)
1da177e4 745{
063675b1 746 struct i2c_adapter *adapter = client->adapter;
52df6440 747 int val1, val2;
1da177e4 748
1da177e4 749 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
4d630e2b 750 pr_debug("detect failed, smbus byte data not supported!\n");
063675b1 751 return -ENODEV;
1da177e4
LT		 752 }
753
52df6440
JD		 754 val1 = i2c_smbus_read_byte_data(client, ASB100_REG_BANK);
755 val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN);
1da177e4 756
52df6440
JD		 757 /* If we're in bank 0 */
758 if ((!(val1 & 0x07)) &&
759 /* Check for ASB100 ID (low byte) */
760 (((!(val1 & 0x80)) && (val2 != 0x94)) ||
761 /* Check for ASB100 ID (high byte ) */
762 ((val1 & 0x80) && (val2 != 0x06)))) {
4d630e2b 763 pr_debug("detect failed, bad chip id 0x%02x!\n", val2);
52df6440
JD		 764 return -ENODEV;
765 }
1da177e4 766
52df6440 767 /* Put it now into bank 0 and Vendor ID High Byte */
063675b1
JD		 768 i2c_smbus_write_byte_data(client, ASB100_REG_BANK,
769 (i2c_smbus_read_byte_data(client, ASB100_REG_BANK) & 0x78)
770 | 0x80);
1da177e4
LT		 771
772 /* Determine the chip type. */
52df6440
JD		 773 val1 = i2c_smbus_read_byte_data(client, ASB100_REG_WCHIPID);
774 val2 = i2c_smbus_read_byte_data(client, ASB100_REG_CHIPMAN);
775
776 if (val1 != 0x31 || val2 != 0x06)
777 return -ENODEV;
1da177e4 778
063675b1 779 strlcpy(info->type, "asb100", I2C_NAME_SIZE);
1da177e4 780
063675b1
JD		 781 return 0;
782}
783
784static int asb100_probe(struct i2c_client *client,
785 const struct i2c_device_id *id)
786{
787 int err;
788 struct asb100_data *data;
789
64adf398
GR		 790 data = devm_kzalloc(&client->dev, sizeof(struct asb100_data),
791 GFP_KERNEL);
792 if (!data)
793 return -ENOMEM;
063675b1
JD		 794
795 i2c_set_clientdata(client, data);
796 mutex_init(&data->lock);
797 mutex_init(&data->update_lock);
1da177e4
LT		 798
799 /* Attach secondary lm75 clients */
063675b1
JD		 800 err = asb100_detect_subclients(client);
801 if (err)
64adf398 802 return err;
1da177e4
LT		 803
804 /* Initialize the chip */
af221931 805 asb100_init_client(client);
1da177e4
LT		 806
807 /* A few vars need to be filled upon startup */
af221931
JD		 808 data->fan_min[0] = asb100_read_value(client, ASB100_REG_FAN_MIN(0));
809 data->fan_min[1] = asb100_read_value(client, ASB100_REG_FAN_MIN(1));
810 data->fan_min[2] = asb100_read_value(client, ASB100_REG_FAN_MIN(2));
1da177e4
LT		 811
812 /* Register sysfs hooks */
8c103696
GR		 813 err = sysfs_create_group(&client->dev.kobj, &asb100_group);
814 if (err)
c1685f61
MH		 815 goto ERROR3;
816
af221931 817 data->hwmon_dev = hwmon_device_register(&client->dev);
1beeffe4
TJ		 818 if (IS_ERR(data->hwmon_dev)) {
819 err = PTR_ERR(data->hwmon_dev);
c1685f61 820 goto ERROR4;
943b0830
MH		 821 }
822
1da177e4
LT		 823 return 0;
824
c1685f61 825ERROR4:
af221931 826 sysfs_remove_group(&client->dev.kobj, &asb100_group);
943b0830 827ERROR3:
063675b1
JD		 828 i2c_unregister_device(data->lm75[1]);
829 i2c_unregister_device(data->lm75[0]);
1da177e4
LT		 830 return err;
831}
832
063675b1 833static int asb100_remove(struct i2c_client *client)
1da177e4 834{
943b0830 835 struct asb100_data *data = i2c_get_clientdata(client);
943b0830 836
063675b1
JD		 837 hwmon_device_unregister(data->hwmon_dev);
838 sysfs_remove_group(&client->dev.kobj, &asb100_group);
1da177e4 839
063675b1
JD		 840 i2c_unregister_device(data->lm75[1]);
841 i2c_unregister_device(data->lm75[0]);
943b0830 842
1da177e4
LT		 843 return 0;
844}
845
8c103696
GR		 846/*
847 * The SMBus locks itself, usually, but nothing may access the chip between
848 * bank switches.
849 */
1da177e4
LT		 850static int asb100_read_value(struct i2c_client *client, u16 reg)
851{
852 struct asb100_data *data = i2c_get_clientdata(client);
853 struct i2c_client *cl;
854 int res, bank;
855
9a61bf63 856 mutex_lock(&data->lock);
1da177e4
LT		 857
858 bank = (reg >> 8) & 0x0f;
859 if (bank > 2)
860 /* switch banks */
861 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
862
863 if (bank == 0 || bank > 2) {
864 res = i2c_smbus_read_byte_data(client, reg & 0xff);
865 } else {
866 /* switch to subclient */
867 cl = data->lm75[bank - 1];
868
869 /* convert from ISA to LM75 I2C addresses */
870 switch (reg & 0xff) {
871 case 0x50: /* TEMP */
90f4102c 872 res = i2c_smbus_read_word_swapped(cl, 0);
1da177e4
LT		 873 break;
874 case 0x52: /* CONFIG */
875 res = i2c_smbus_read_byte_data(cl, 1);
876 break;
877 case 0x53: /* HYST */
90f4102c 878 res = i2c_smbus_read_word_swapped(cl, 2);
1da177e4
LT		 879 break;
880 case 0x55: /* MAX */
881 default:
90f4102c 882 res = i2c_smbus_read_word_swapped(cl, 3);
1da177e4
LT		 883 break;
884 }
885 }
886
887 if (bank > 2)
888 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
889
9a61bf63 890 mutex_unlock(&data->lock);
1da177e4
LT		 891
892 return res;
893}
894
895static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value)
896{
897 struct asb100_data *data = i2c_get_clientdata(client);
898 struct i2c_client *cl;
899 int bank;
900
9a61bf63 901 mutex_lock(&data->lock);
1da177e4
LT		 902
903 bank = (reg >> 8) & 0x0f;
904 if (bank > 2)
905 /* switch banks */
906 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
907
908 if (bank == 0 || bank > 2) {
909 i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff);
910 } else {
911 /* switch to subclient */
912 cl = data->lm75[bank - 1];
913
914 /* convert from ISA to LM75 I2C addresses */
915 switch (reg & 0xff) {
916 case 0x52: /* CONFIG */
917 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
918 break;
919 case 0x53: /* HYST */
90f4102c 920 i2c_smbus_write_word_swapped(cl, 2, value);
1da177e4
LT		 921 break;
922 case 0x55: /* MAX */
90f4102c 923 i2c_smbus_write_word_swapped(cl, 3, value);
1da177e4
LT		 924 break;
925 }
926 }
927
928 if (bank > 2)
929 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
930
9a61bf63 931 mutex_unlock(&data->lock);
1da177e4
LT		 932}
933
934static void asb100_init_client(struct i2c_client *client)
935{
936 struct asb100_data *data = i2c_get_clientdata(client);
1da177e4 937
303760b4 938 data->vrm = vid_which_vrm();
1da177e4
LT		 939
940 /* Start monitoring */
af221931 941 asb100_write_value(client, ASB100_REG_CONFIG,
1da177e4
LT		 942 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01);
943}
944
945static struct asb100_data *asb100_update_device(struct device *dev)
946{
947 struct i2c_client *client = to_i2c_client(dev);
948 struct asb100_data *data = i2c_get_clientdata(client);
949 int i;
950
9a61bf63 951 mutex_lock(&data->update_lock);
1da177e4
LT		 952
953 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
954 || !data->valid) {
955
956 dev_dbg(&client->dev, "starting device update...\n");
957
958 /* 7 voltage inputs */
959 for (i = 0; i < 7; i++) {
960 data->in[i] = asb100_read_value(client,
961 ASB100_REG_IN(i));
962 data->in_min[i] = asb100_read_value(client,
963 ASB100_REG_IN_MIN(i));
964 data->in_max[i] = asb100_read_value(client,
965 ASB100_REG_IN_MAX(i));
966 }
967
968 /* 3 fan inputs */
969 for (i = 0; i < 3; i++) {
970 data->fan[i] = asb100_read_value(client,
971 ASB100_REG_FAN(i));
972 data->fan_min[i] = asb100_read_value(client,
973 ASB100_REG_FAN_MIN(i));
974 }
975
976 /* 4 temperature inputs */
977 for (i = 1; i <= 4; i++) {
978 data->temp[i-1] = asb100_read_value(client,
979 ASB100_REG_TEMP(i));
980 data->temp_max[i-1] = asb100_read_value(client,
981 ASB100_REG_TEMP_MAX(i));
982 data->temp_hyst[i-1] = asb100_read_value(client,
983 ASB100_REG_TEMP_HYST(i));
984 }
985
986 /* VID and fan divisors */
987 i = asb100_read_value(client, ASB100_REG_VID_FANDIV);
988 data->vid = i & 0x0f;
989 data->vid |= (asb100_read_value(client,
990 ASB100_REG_CHIPID) & 0x01) << 4;
991 data->fan_div[0] = (i >> 4) & 0x03;
992 data->fan_div[1] = (i >> 6) & 0x03;
993 data->fan_div[2] = (asb100_read_value(client,
994 ASB100_REG_PIN) >> 6) & 0x03;
995
996 /* PWM */
997 data->pwm = asb100_read_value(client, ASB100_REG_PWM1);
998
999 /* alarms */
1000 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) +
1001 (asb100_read_value(client, ASB100_REG_ALARM2) << 8);
1002
1003 data->last_updated = jiffies;
1004 data->valid = 1;
1005
1006 dev_dbg(&client->dev, "... device update complete\n");
1007 }
1008
9a61bf63 1009 mutex_unlock(&data->update_lock);
1da177e4
LT		 1010
1011 return data;
1012}
1013
f0967eea 1014module_i2c_driver(asb100_driver);
1da177e4
LT		 1015
1016MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
1017MODULE_DESCRIPTION("ASB100 Bach driver");
1018MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)