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hwmon: VRM is not written to registers
[deliverable/linux.git] / drivers / hwmon / asb100.c
CommitLineData
1da177e4
LT		 1/*
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*/
27
28/*
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
35 Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
36 asb100 7 3 1 4 0x31 0x0694 yes no
37*/
38
39#include <linux/module.h>
40#include <linux/slab.h>
41#include <linux/i2c.h>
943b0830 42#include <linux/hwmon.h>
303760b4 43#include <linux/hwmon-vid.h>
943b0830 44#include <linux/err.h>
1da177e4 45#include <linux/init.h>
ff324094 46#include <linux/jiffies.h>
9a61bf63 47#include <linux/mutex.h>
1da177e4
LT		 48#include "lm75.h"
49
50/*
51 HISTORY:
52 2003-12-29 1.0.0 Ported from lm_sensors project for kernel 2.6
53*/
54#define ASB100_VERSION "1.0.0"
55
56/* I2C addresses to scan */
57static unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END };
58
1da177e4 59/* Insmod parameters */
f4b50261 60I2C_CLIENT_INSMOD_1(asb100);
1da177e4
LT		 61I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
62 "{bus, clientaddr, subclientaddr1, subclientaddr2}");
63
64/* Voltage IN registers 0-6 */
65#define ASB100_REG_IN(nr) (0x20 + (nr))
66#define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2))
67#define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2))
68
69/* FAN IN registers 1-3 */
70#define ASB100_REG_FAN(nr) (0x28 + (nr))
71#define ASB100_REG_FAN_MIN(nr) (0x3b + (nr))
72
73/* TEMPERATURE registers 1-4 */
74static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17};
75static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18};
76static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19};
77
78#define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr])
79#define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr])
80#define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr])
81
82#define ASB100_REG_TEMP2_CONFIG 0x0152
83#define ASB100_REG_TEMP3_CONFIG 0x0252
84
85
86#define ASB100_REG_CONFIG 0x40
87#define ASB100_REG_ALARM1 0x41
88#define ASB100_REG_ALARM2 0x42
89#define ASB100_REG_SMIM1 0x43
90#define ASB100_REG_SMIM2 0x44
91#define ASB100_REG_VID_FANDIV 0x47
92#define ASB100_REG_I2C_ADDR 0x48
93#define ASB100_REG_CHIPID 0x49
94#define ASB100_REG_I2C_SUBADDR 0x4a
95#define ASB100_REG_PIN 0x4b
96#define ASB100_REG_IRQ 0x4c
97#define ASB100_REG_BANK 0x4e
98#define ASB100_REG_CHIPMAN 0x4f
99
100#define ASB100_REG_WCHIPID 0x58
101
102/* bit 7 -> enable, bits 0-3 -> duty cycle */
103#define ASB100_REG_PWM1 0x59
104
105/* CONVERSIONS
106 Rounding and limit checking is only done on the TO_REG variants. */
107
108/* These constants are a guess, consistent w/ w83781d */
109#define ASB100_IN_MIN ( 0)
110#define ASB100_IN_MAX (4080)
111
112/* IN: 1/1000 V (0V to 4.08V)
113 REG: 16mV/bit */
114static u8 IN_TO_REG(unsigned val)
115{
116 unsigned nval = SENSORS_LIMIT(val, ASB100_IN_MIN, ASB100_IN_MAX);
117 return (nval + 8) / 16;
118}
119
120static unsigned IN_FROM_REG(u8 reg)
121{
122 return reg * 16;
123}
124
125static u8 FAN_TO_REG(long rpm, int div)
126{
127 if (rpm == -1)
128 return 0;
129 if (rpm == 0)
130 return 255;
131 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
132 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
133}
134
135static int FAN_FROM_REG(u8 val, int div)
136{
137 return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div);
138}
139
140/* These constants are a guess, consistent w/ w83781d */
141#define ASB100_TEMP_MIN (-128000)
142#define ASB100_TEMP_MAX ( 127000)
143
144/* TEMP: 0.001C/bit (-128C to +127C)
145 REG: 1C/bit, two's complement */
5bfedac0 146static u8 TEMP_TO_REG(long temp)
1da177e4
LT		 147{
148 int ntemp = SENSORS_LIMIT(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX);
149 ntemp += (ntemp<0 ? -500 : 500);
150 return (u8)(ntemp / 1000);
151}
152
153static int TEMP_FROM_REG(u8 reg)
154{
155 return (s8)reg * 1000;
156}
157
158/* PWM: 0 - 255 per sensors documentation
159 REG: (6.25% duty cycle per bit) */
160static u8 ASB100_PWM_TO_REG(int pwm)
161{
162 pwm = SENSORS_LIMIT(pwm, 0, 255);
163 return (u8)(pwm / 16);
164}
165
166static int ASB100_PWM_FROM_REG(u8 reg)
167{
168 return reg * 16;
169}
170
1da177e4
LT		 171#define DIV_FROM_REG(val) (1 << (val))
172
173/* FAN DIV: 1, 2, 4, or 8 (defaults to 2)
174 REG: 0, 1, 2, or 3 (respectively) (defaults to 1) */
175static u8 DIV_TO_REG(long val)
176{
177 return val==8 ? 3 : val==4 ? 2 : val==1 ? 0 : 1;
178}
179
180/* For each registered client, we need to keep some data in memory. That
181 data is pointed to by client->data. The structure itself is
182 dynamically allocated, at the same time the client itself is allocated. */
183struct asb100_data {
184 struct i2c_client client;
1beeffe4 185 struct device *hwmon_dev;
9a61bf63 186 struct mutex lock;
1da177e4
LT		 187 enum chips type;
188
9a61bf63 189 struct mutex update_lock;
1da177e4
LT		 190 unsigned long last_updated; /* In jiffies */
191
192 /* array of 2 pointers to subclients */
193 struct i2c_client *lm75[2];
194
195 char valid; /* !=0 if following fields are valid */
196 u8 in[7]; /* Register value */
197 u8 in_max[7]; /* Register value */
198 u8 in_min[7]; /* Register value */
199 u8 fan[3]; /* Register value */
200 u8 fan_min[3]; /* Register value */
201 u16 temp[4]; /* Register value (0 and 3 are u8 only) */
202 u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */
203 u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */
204 u8 fan_div[3]; /* Register encoding, right justified */
205 u8 pwm; /* Register encoding */
206 u8 vid; /* Register encoding, combined */
207 u32 alarms; /* Register encoding, combined */
208 u8 vrm;
209};
210
211static int asb100_read_value(struct i2c_client *client, u16 reg);
212static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val);
213
214static int asb100_attach_adapter(struct i2c_adapter *adapter);
215static int asb100_detect(struct i2c_adapter *adapter, int address, int kind);
216static int asb100_detach_client(struct i2c_client *client);
217static struct asb100_data *asb100_update_device(struct device *dev);
218static void asb100_init_client(struct i2c_client *client);
219
220static struct i2c_driver asb100_driver = {
cdaf7934 221 .driver = {
cdaf7934
LR		 222 .name = "asb100",
223 },
1da177e4
LT		 224 .attach_adapter = asb100_attach_adapter,
225 .detach_client = asb100_detach_client,
226};
227
228/* 7 Voltages */
229#define show_in_reg(reg) \
230static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
231{ \
232 struct asb100_data *data = asb100_update_device(dev); \
233 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
234}
235
236show_in_reg(in)
237show_in_reg(in_min)
238show_in_reg(in_max)
239
240#define set_in_reg(REG, reg) \
241static ssize_t set_in_##reg(struct device *dev, const char *buf, \
242 size_t count, int nr) \
243{ \
244 struct i2c_client *client = to_i2c_client(dev); \
245 struct asb100_data *data = i2c_get_clientdata(client); \
246 unsigned long val = simple_strtoul(buf, NULL, 10); \
247 \
9a61bf63 248 mutex_lock(&data->update_lock); \
1da177e4
LT		 249 data->in_##reg[nr] = IN_TO_REG(val); \
250 asb100_write_value(client, ASB100_REG_IN_##REG(nr), \
251 data->in_##reg[nr]); \
9a61bf63 252 mutex_unlock(&data->update_lock); \
1da177e4
LT		 253 return count; \
254}
255
256set_in_reg(MIN, min)
257set_in_reg(MAX, max)
258
259#define sysfs_in(offset) \
260static ssize_t \
30f74292 261 show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 262{ \
263 return show_in(dev, buf, offset); \
264} \
265static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
266 show_in##offset, NULL); \
267static ssize_t \
30f74292 268 show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 269{ \
270 return show_in_min(dev, buf, offset); \
271} \
272static ssize_t \
30f74292 273 show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 274{ \
275 return show_in_max(dev, buf, offset); \
276} \
30f74292 277static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \
1da177e4
LT		 278 const char *buf, size_t count) \
279{ \
280 return set_in_min(dev, buf, count, offset); \
281} \
30f74292 282static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \
1da177e4
LT		 283 const char *buf, size_t count) \
284{ \
285 return set_in_max(dev, buf, count, offset); \
286} \
287static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
288 show_in##offset##_min, set_in##offset##_min); \
289static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
290 show_in##offset##_max, set_in##offset##_max);
291
292sysfs_in(0);
293sysfs_in(1);
294sysfs_in(2);
295sysfs_in(3);
296sysfs_in(4);
297sysfs_in(5);
298sysfs_in(6);
299
1da177e4
LT		 300/* 3 Fans */
301static ssize_t show_fan(struct device *dev, char *buf, int nr)
302{
303 struct asb100_data *data = asb100_update_device(dev);
304 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
305 DIV_FROM_REG(data->fan_div[nr])));
306}
307
308static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
309{
310 struct asb100_data *data = asb100_update_device(dev);
311 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
312 DIV_FROM_REG(data->fan_div[nr])));
313}
314
315static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
316{
317 struct asb100_data *data = asb100_update_device(dev);
318 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
319}
320
321static ssize_t set_fan_min(struct device *dev, const char *buf,
322 size_t count, int nr)
323{
324 struct i2c_client *client = to_i2c_client(dev);
325 struct asb100_data *data = i2c_get_clientdata(client);
326 u32 val = simple_strtoul(buf, NULL, 10);
327
9a61bf63 328 mutex_lock(&data->update_lock);
1da177e4
LT		 329 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
330 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
9a61bf63 331 mutex_unlock(&data->update_lock);
1da177e4
LT		 332 return count;
333}
334
335/* Note: we save and restore the fan minimum here, because its value is
336 determined in part by the fan divisor. This follows the principle of
d6e05edc 337 least surprise; the user doesn't expect the fan minimum to change just
1da177e4
LT		 338 because the divisor changed. */
339static ssize_t set_fan_div(struct device *dev, const char *buf,
340 size_t count, int nr)
341{
342 struct i2c_client *client = to_i2c_client(dev);
343 struct asb100_data *data = i2c_get_clientdata(client);
344 unsigned long min;
345 unsigned long val = simple_strtoul(buf, NULL, 10);
346 int reg;
347
9a61bf63 348 mutex_lock(&data->update_lock);
1da177e4
LT		 349
350 min = FAN_FROM_REG(data->fan_min[nr],
351 DIV_FROM_REG(data->fan_div[nr]));
352 data->fan_div[nr] = DIV_TO_REG(val);
353
354 switch(nr) {
355 case 0: /* fan 1 */
356 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
357 reg = (reg & 0xcf) | (data->fan_div[0] << 4);
358 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
359 break;
360
361 case 1: /* fan 2 */
362 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
363 reg = (reg & 0x3f) | (data->fan_div[1] << 6);
364 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
365 break;
366
367 case 2: /* fan 3 */
368 reg = asb100_read_value(client, ASB100_REG_PIN);
369 reg = (reg & 0x3f) | (data->fan_div[2] << 6);
370 asb100_write_value(client, ASB100_REG_PIN, reg);
371 break;
372 }
373
374 data->fan_min[nr] =
375 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
376 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
377
9a61bf63 378 mutex_unlock(&data->update_lock);
1da177e4
LT		 379
380 return count;
381}
382
383#define sysfs_fan(offset) \
30f74292 384static ssize_t show_fan##offset(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 385{ \
386 return show_fan(dev, buf, offset - 1); \
387} \
30f74292 388static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 389{ \
390 return show_fan_min(dev, buf, offset - 1); \
391} \
30f74292 392static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 393{ \
394 return show_fan_div(dev, buf, offset - 1); \
395} \
30f74292 396static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
1da177e4
LT		 397 size_t count) \
398{ \
399 return set_fan_min(dev, buf, count, offset - 1); \
400} \
30f74292 401static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
1da177e4
LT		 402 size_t count) \
403{ \
404 return set_fan_div(dev, buf, count, offset - 1); \
405} \
406static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
407 show_fan##offset, NULL); \
408static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
409 show_fan##offset##_min, set_fan##offset##_min); \
410static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
411 show_fan##offset##_div, set_fan##offset##_div);
412
413sysfs_fan(1);
414sysfs_fan(2);
415sysfs_fan(3);
416
1da177e4
LT		 417/* 4 Temp. Sensors */
418static int sprintf_temp_from_reg(u16 reg, char *buf, int nr)
419{
420 int ret = 0;
421
422 switch (nr) {
423 case 1: case 2:
424 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg));
425 break;
426 case 0: case 3: default:
427 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg));
428 break;
429 }
430 return ret;
431}
432
433#define show_temp_reg(reg) \
434static ssize_t show_##reg(struct device *dev, char *buf, int nr) \
435{ \
436 struct asb100_data *data = asb100_update_device(dev); \
437 return sprintf_temp_from_reg(data->reg[nr], buf, nr); \
438}
439
440show_temp_reg(temp);
441show_temp_reg(temp_max);
442show_temp_reg(temp_hyst);
443
444#define set_temp_reg(REG, reg) \
445static ssize_t set_##reg(struct device *dev, const char *buf, \
446 size_t count, int nr) \
447{ \
448 struct i2c_client *client = to_i2c_client(dev); \
449 struct asb100_data *data = i2c_get_clientdata(client); \
5bfedac0 450 long val = simple_strtol(buf, NULL, 10); \
1da177e4 451 \
9a61bf63 452 mutex_lock(&data->update_lock); \
1da177e4
LT		 453 switch (nr) { \
454 case 1: case 2: \
455 data->reg[nr] = LM75_TEMP_TO_REG(val); \
456 break; \
457 case 0: case 3: default: \
458 data->reg[nr] = TEMP_TO_REG(val); \
459 break; \
460 } \
461 asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \
462 data->reg[nr]); \
9a61bf63 463 mutex_unlock(&data->update_lock); \
1da177e4
LT		 464 return count; \
465}
466
467set_temp_reg(MAX, temp_max);
468set_temp_reg(HYST, temp_hyst);
469
470#define sysfs_temp(num) \
30f74292 471static ssize_t show_temp##num(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 472{ \
473 return show_temp(dev, buf, num-1); \
474} \
475static DEVICE_ATTR(temp##num##_input, S_IRUGO, show_temp##num, NULL); \
30f74292 476static ssize_t show_temp_max##num(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 477{ \
478 return show_temp_max(dev, buf, num-1); \
479} \
30f74292 480static ssize_t set_temp_max##num(struct device *dev, struct device_attribute *attr, const char *buf, \
1da177e4
LT		 481 size_t count) \
482{ \
483 return set_temp_max(dev, buf, count, num-1); \
484} \
485static DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \
486 show_temp_max##num, set_temp_max##num); \
30f74292 487static ssize_t show_temp_hyst##num(struct device *dev, struct device_attribute *attr, char *buf) \
1da177e4
LT		 488{ \
489 return show_temp_hyst(dev, buf, num-1); \
490} \
30f74292 491static ssize_t set_temp_hyst##num(struct device *dev, struct device_attribute *attr, const char *buf, \
1da177e4
LT		 492 size_t count) \
493{ \
494 return set_temp_hyst(dev, buf, count, num-1); \
495} \
496static DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \
497 show_temp_hyst##num, set_temp_hyst##num);
498
499sysfs_temp(1);
500sysfs_temp(2);
501sysfs_temp(3);
502sysfs_temp(4);
503
504/* VID */
30f74292 505static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 506{
507 struct asb100_data *data = asb100_update_device(dev);
508 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
509}
510
511static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
1da177e4
LT		 512
513/* VRM */
30f74292 514static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4 515{
90d6619a 516 struct asb100_data *data = dev_get_drvdata(dev);
1da177e4
LT		 517 return sprintf(buf, "%d\n", data->vrm);
518}
519
30f74292 520static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1da177e4 521{
8f74efe8
JD		 522 struct asb100_data *data = dev_get_drvdata(dev);
523 data->vrm = simple_strtoul(buf, NULL, 10);
1da177e4
LT		 524 return count;
525}
526
527/* Alarms */
528static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
1da177e4 529
30f74292 530static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 531{
532 struct asb100_data *data = asb100_update_device(dev);
68188ba7 533 return sprintf(buf, "%u\n", data->alarms);
1da177e4
LT		 534}
535
536static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1da177e4
LT		 537
538/* 1 PWM */
30f74292 539static ssize_t show_pwm1(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 540{
541 struct asb100_data *data = asb100_update_device(dev);
542 return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f));
543}
544
30f74292 545static ssize_t set_pwm1(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1da177e4
LT		 546{
547 struct i2c_client *client = to_i2c_client(dev);
548 struct asb100_data *data = i2c_get_clientdata(client);
549 unsigned long val = simple_strtoul(buf, NULL, 10);
550
9a61bf63 551 mutex_lock(&data->update_lock);
1da177e4
LT		 552 data->pwm &= 0x80; /* keep the enable bit */
553 data->pwm |= (0x0f & ASB100_PWM_TO_REG(val));
554 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
9a61bf63 555 mutex_unlock(&data->update_lock);
1da177e4
LT		 556 return count;
557}
558
30f74292 559static ssize_t show_pwm_enable1(struct device *dev, struct device_attribute *attr, char *buf)
1da177e4
LT		 560{
561 struct asb100_data *data = asb100_update_device(dev);
562 return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0);
563}
564
30f74292 565static ssize_t set_pwm_enable1(struct device *dev, struct device_attribute *attr, const char *buf,
1da177e4
LT		 566 size_t count)
567{
568 struct i2c_client *client = to_i2c_client(dev);
569 struct asb100_data *data = i2c_get_clientdata(client);
570 unsigned long val = simple_strtoul(buf, NULL, 10);
571
9a61bf63 572 mutex_lock(&data->update_lock);
1da177e4
LT		 573 data->pwm &= 0x0f; /* keep the duty cycle bits */
574 data->pwm |= (val ? 0x80 : 0x00);
575 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
9a61bf63 576 mutex_unlock(&data->update_lock);
1da177e4
LT		 577 return count;
578}
579
580static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1);
581static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
582 show_pwm_enable1, set_pwm_enable1);
c1685f61
MH		 583
584static struct attribute *asb100_attributes[] = {
585 &dev_attr_in0_input.attr,
586 &dev_attr_in0_min.attr,
587 &dev_attr_in0_max.attr,
588 &dev_attr_in1_input.attr,
589 &dev_attr_in1_min.attr,
590 &dev_attr_in1_max.attr,
591 &dev_attr_in2_input.attr,
592 &dev_attr_in2_min.attr,
593 &dev_attr_in2_max.attr,
594 &dev_attr_in3_input.attr,
595 &dev_attr_in3_min.attr,
596 &dev_attr_in3_max.attr,
597 &dev_attr_in4_input.attr,
598 &dev_attr_in4_min.attr,
599 &dev_attr_in4_max.attr,
600 &dev_attr_in5_input.attr,
601 &dev_attr_in5_min.attr,
602 &dev_attr_in5_max.attr,
603 &dev_attr_in6_input.attr,
604 &dev_attr_in6_min.attr,
605 &dev_attr_in6_max.attr,
606
607 &dev_attr_fan1_input.attr,
608 &dev_attr_fan1_min.attr,
609 &dev_attr_fan1_div.attr,
610 &dev_attr_fan2_input.attr,
611 &dev_attr_fan2_min.attr,
612 &dev_attr_fan2_div.attr,
613 &dev_attr_fan3_input.attr,
614 &dev_attr_fan3_min.attr,
615 &dev_attr_fan3_div.attr,
616
617 &dev_attr_temp1_input.attr,
618 &dev_attr_temp1_max.attr,
619 &dev_attr_temp1_max_hyst.attr,
620 &dev_attr_temp2_input.attr,
621 &dev_attr_temp2_max.attr,
622 &dev_attr_temp2_max_hyst.attr,
623 &dev_attr_temp3_input.attr,
624 &dev_attr_temp3_max.attr,
625 &dev_attr_temp3_max_hyst.attr,
626 &dev_attr_temp4_input.attr,
627 &dev_attr_temp4_max.attr,
628 &dev_attr_temp4_max_hyst.attr,
629
630 &dev_attr_cpu0_vid.attr,
631 &dev_attr_vrm.attr,
632 &dev_attr_alarms.attr,
633 &dev_attr_pwm1.attr,
634 &dev_attr_pwm1_enable.attr,
635
636 NULL
637};
638
639static const struct attribute_group asb100_group = {
640 .attrs = asb100_attributes,
641};
1da177e4
LT		 642
643/* This function is called when:
644 asb100_driver is inserted (when this module is loaded), for each
645 available adapter
646 when a new adapter is inserted (and asb100_driver is still present)
647 */
648static int asb100_attach_adapter(struct i2c_adapter *adapter)
649{
650 if (!(adapter->class & I2C_CLASS_HWMON))
651 return 0;
2ed2dc3c 652 return i2c_probe(adapter, &addr_data, asb100_detect);
1da177e4
LT		 653}
654
655static int asb100_detect_subclients(struct i2c_adapter *adapter, int address,
656 int kind, struct i2c_client *new_client)
657{
658 int i, id, err;
659 struct asb100_data *data = i2c_get_clientdata(new_client);
660
ba9c2e8d 661 data->lm75[0] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
1da177e4
LT		 662 if (!(data->lm75[0])) {
663 err = -ENOMEM;
664 goto ERROR_SC_0;
665 }
1da177e4 666
ba9c2e8d 667 data->lm75[1] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
1da177e4
LT		 668 if (!(data->lm75[1])) {
669 err = -ENOMEM;
670 goto ERROR_SC_1;
671 }
1da177e4
LT		 672
673 id = i2c_adapter_id(adapter);
674
675 if (force_subclients[0] == id && force_subclients[1] == address) {
676 for (i = 2; i <= 3; i++) {
677 if (force_subclients[i] < 0x48 ||
678 force_subclients[i] > 0x4f) {
679 dev_err(&new_client->dev, "invalid subclient "
680 "address %d; must be 0x48-0x4f\n",
681 force_subclients[i]);
682 err = -ENODEV;
683 goto ERROR_SC_2;
684 }
685 }
686 asb100_write_value(new_client, ASB100_REG_I2C_SUBADDR,
687 (force_subclients[2] & 0x07) |
688 ((force_subclients[3] & 0x07) <<4));
689 data->lm75[0]->addr = force_subclients[2];
690 data->lm75[1]->addr = force_subclients[3];
691 } else {
692 int val = asb100_read_value(new_client, ASB100_REG_I2C_SUBADDR);
693 data->lm75[0]->addr = 0x48 + (val & 0x07);
694 data->lm75[1]->addr = 0x48 + ((val >> 4) & 0x07);
695 }
696
697 if(data->lm75[0]->addr == data->lm75[1]->addr) {
698 dev_err(&new_client->dev, "duplicate addresses 0x%x "
699 "for subclients\n", data->lm75[0]->addr);
700 err = -ENODEV;
701 goto ERROR_SC_2;
702 }
703
704 for (i = 0; i <= 1; i++) {
705 i2c_set_clientdata(data->lm75[i], NULL);
706 data->lm75[i]->adapter = adapter;
707 data->lm75[i]->driver = &asb100_driver;
708 data->lm75[i]->flags = 0;
709 strlcpy(data->lm75[i]->name, "asb100 subclient", I2C_NAME_SIZE);
710 }
711
712 if ((err = i2c_attach_client(data->lm75[0]))) {
713 dev_err(&new_client->dev, "subclient %d registration "
714 "at address 0x%x failed.\n", i, data->lm75[0]->addr);
715 goto ERROR_SC_2;
716 }
717
718 if ((err = i2c_attach_client(data->lm75[1]))) {
719 dev_err(&new_client->dev, "subclient %d registration "
720 "at address 0x%x failed.\n", i, data->lm75[1]->addr);
721 goto ERROR_SC_3;
722 }
723
724 return 0;
725
726/* Undo inits in case of errors */
727ERROR_SC_3:
728 i2c_detach_client(data->lm75[0]);
729ERROR_SC_2:
730 kfree(data->lm75[1]);
731ERROR_SC_1:
732 kfree(data->lm75[0]);
733ERROR_SC_0:
734 return err;
735}
736
737static int asb100_detect(struct i2c_adapter *adapter, int address, int kind)
738{
739 int err;
740 struct i2c_client *new_client;
741 struct asb100_data *data;
742
1da177e4
LT		 743 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
744 pr_debug("asb100.o: detect failed, "
745 "smbus byte data not supported!\n");
746 err = -ENODEV;
747 goto ERROR0;
748 }
749
750 /* OK. For now, we presume we have a valid client. We now create the
751 client structure, even though we cannot fill it completely yet.
752 But it allows us to access asb100_{read,write}_value. */
753
ba9c2e8d
DS		 754 if (!(data = kzalloc(sizeof(struct asb100_data), GFP_KERNEL))) {
755 pr_debug("asb100.o: detect failed, kzalloc failed!\n");
1da177e4
LT		 756 err = -ENOMEM;
757 goto ERROR0;
758 }
1da177e4
LT		 759
760 new_client = &data->client;
9a61bf63 761 mutex_init(&data->lock);
1da177e4
LT		 762 i2c_set_clientdata(new_client, data);
763 new_client->addr = address;
764 new_client->adapter = adapter;
765 new_client->driver = &asb100_driver;
766 new_client->flags = 0;
767
768 /* Now, we do the remaining detection. */
769
770 /* The chip may be stuck in some other bank than bank 0. This may
771 make reading other information impossible. Specify a force=... or
772 force_*=... parameter, and the chip will be reset to the right
773 bank. */
774 if (kind < 0) {
775
776 int val1 = asb100_read_value(new_client, ASB100_REG_BANK);
777 int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
778
779 /* If we're in bank 0 */
780 if ( (!(val1 & 0x07)) &&
781 /* Check for ASB100 ID (low byte) */
782 ( ((!(val1 & 0x80)) && (val2 != 0x94)) ||
783 /* Check for ASB100 ID (high byte ) */
784 ((val1 & 0x80) && (val2 != 0x06)) ) ) {
785 pr_debug("asb100.o: detect failed, "
786 "bad chip id 0x%02x!\n", val2);
787 err = -ENODEV;
788 goto ERROR1;
789 }
790
791 } /* kind < 0 */
792
793 /* We have either had a force parameter, or we have already detected
794 Winbond. Put it now into bank 0 and Vendor ID High Byte */
795 asb100_write_value(new_client, ASB100_REG_BANK,
796 (asb100_read_value(new_client, ASB100_REG_BANK) & 0x78) | 0x80);
797
798 /* Determine the chip type. */
799 if (kind <= 0) {
800 int val1 = asb100_read_value(new_client, ASB100_REG_WCHIPID);
801 int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
802
803 if ((val1 == 0x31) && (val2 == 0x06))
804 kind = asb100;
805 else {
806 if (kind == 0)
807 dev_warn(&new_client->dev, "ignoring "
808 "'force' parameter for unknown chip "
809 "at adapter %d, address 0x%02x.\n",
810 i2c_adapter_id(adapter), address);
811 err = -ENODEV;
812 goto ERROR1;
813 }
814 }
815
816 /* Fill in remaining client fields and put it into the global list */
817 strlcpy(new_client->name, "asb100", I2C_NAME_SIZE);
818 data->type = kind;
819
820 data->valid = 0;
9a61bf63 821 mutex_init(&data->update_lock);
1da177e4
LT		 822
823 /* Tell the I2C layer a new client has arrived */
824 if ((err = i2c_attach_client(new_client)))
825 goto ERROR1;
826
827 /* Attach secondary lm75 clients */
828 if ((err = asb100_detect_subclients(adapter, address, kind,
829 new_client)))
830 goto ERROR2;
831
832 /* Initialize the chip */
833 asb100_init_client(new_client);
834
835 /* A few vars need to be filled upon startup */
836 data->fan_min[0] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(0));
837 data->fan_min[1] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(1));
838 data->fan_min[2] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(2));
839
840 /* Register sysfs hooks */
c1685f61
MH		 841 if ((err = sysfs_create_group(&new_client->dev.kobj, &asb100_group)))
842 goto ERROR3;
843
1beeffe4
TJ		 844 data->hwmon_dev = hwmon_device_register(&new_client->dev);
845 if (IS_ERR(data->hwmon_dev)) {
846 err = PTR_ERR(data->hwmon_dev);
c1685f61 847 goto ERROR4;
943b0830
MH		 848 }
849
1da177e4
LT		 850 return 0;
851
c1685f61
MH		 852ERROR4:
853 sysfs_remove_group(&new_client->dev.kobj, &asb100_group);
943b0830
MH		 854ERROR3:
855 i2c_detach_client(data->lm75[1]);
856 i2c_detach_client(data->lm75[0]);
857 kfree(data->lm75[1]);
858 kfree(data->lm75[0]);
1da177e4
LT		 859ERROR2:
860 i2c_detach_client(new_client);
861ERROR1:
862 kfree(data);
863ERROR0:
864 return err;
865}
866
867static int asb100_detach_client(struct i2c_client *client)
868{
943b0830 869 struct asb100_data *data = i2c_get_clientdata(client);
1da177e4
LT		 870 int err;
871
943b0830 872 /* main client */
c1685f61 873 if (data) {
1beeffe4 874 hwmon_device_unregister(data->hwmon_dev);
c1685f61
MH		 875 sysfs_remove_group(&client->dev.kobj, &asb100_group);
876 }
943b0830 877
7bef5594 878 if ((err = i2c_detach_client(client)))
1da177e4 879 return err;
1da177e4 880
943b0830
MH		 881 /* main client */
882 if (data)
883 kfree(data);
884
885 /* subclient */
886 else
1da177e4 887 kfree(client);
1da177e4
LT		 888
889 return 0;
890}
891
892/* The SMBus locks itself, usually, but nothing may access the chip between
893 bank switches. */
894static int asb100_read_value(struct i2c_client *client, u16 reg)
895{
896 struct asb100_data *data = i2c_get_clientdata(client);
897 struct i2c_client *cl;
898 int res, bank;
899
9a61bf63 900 mutex_lock(&data->lock);
1da177e4
LT		 901
902 bank = (reg >> 8) & 0x0f;
903 if (bank > 2)
904 /* switch banks */
905 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
906
907 if (bank == 0 || bank > 2) {
908 res = i2c_smbus_read_byte_data(client, reg & 0xff);
909 } else {
910 /* switch to subclient */
911 cl = data->lm75[bank - 1];
912
913 /* convert from ISA to LM75 I2C addresses */
914 switch (reg & 0xff) {
915 case 0x50: /* TEMP */
916 res = swab16(i2c_smbus_read_word_data (cl, 0));
917 break;
918 case 0x52: /* CONFIG */
919 res = i2c_smbus_read_byte_data(cl, 1);
920 break;
921 case 0x53: /* HYST */
922 res = swab16(i2c_smbus_read_word_data (cl, 2));
923 break;
924 case 0x55: /* MAX */
925 default:
926 res = swab16(i2c_smbus_read_word_data (cl, 3));
927 break;
928 }
929 }
930
931 if (bank > 2)
932 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
933
9a61bf63 934 mutex_unlock(&data->lock);
1da177e4
LT		 935
936 return res;
937}
938
939static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value)
940{
941 struct asb100_data *data = i2c_get_clientdata(client);
942 struct i2c_client *cl;
943 int bank;
944
9a61bf63 945 mutex_lock(&data->lock);
1da177e4
LT		 946
947 bank = (reg >> 8) & 0x0f;
948 if (bank > 2)
949 /* switch banks */
950 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
951
952 if (bank == 0 || bank > 2) {
953 i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff);
954 } else {
955 /* switch to subclient */
956 cl = data->lm75[bank - 1];
957
958 /* convert from ISA to LM75 I2C addresses */
959 switch (reg & 0xff) {
960 case 0x52: /* CONFIG */
961 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
962 break;
963 case 0x53: /* HYST */
964 i2c_smbus_write_word_data(cl, 2, swab16(value));
965 break;
966 case 0x55: /* MAX */
967 i2c_smbus_write_word_data(cl, 3, swab16(value));
968 break;
969 }
970 }
971
972 if (bank > 2)
973 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
974
9a61bf63 975 mutex_unlock(&data->lock);
1da177e4
LT		 976}
977
978static void asb100_init_client(struct i2c_client *client)
979{
980 struct asb100_data *data = i2c_get_clientdata(client);
981 int vid = 0;
982
983 vid = asb100_read_value(client, ASB100_REG_VID_FANDIV) & 0x0f;
984 vid |= (asb100_read_value(client, ASB100_REG_CHIPID) & 0x01) << 4;
303760b4 985 data->vrm = vid_which_vrm();
1da177e4
LT		 986 vid = vid_from_reg(vid, data->vrm);
987
988 /* Start monitoring */
989 asb100_write_value(client, ASB100_REG_CONFIG,
990 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01);
991}
992
993static struct asb100_data *asb100_update_device(struct device *dev)
994{
995 struct i2c_client *client = to_i2c_client(dev);
996 struct asb100_data *data = i2c_get_clientdata(client);
997 int i;
998
9a61bf63 999 mutex_lock(&data->update_lock);
1da177e4
LT		 1000
1001 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1002 || !data->valid) {
1003
1004 dev_dbg(&client->dev, "starting device update...\n");
1005
1006 /* 7 voltage inputs */
1007 for (i = 0; i < 7; i++) {
1008 data->in[i] = asb100_read_value(client,
1009 ASB100_REG_IN(i));
1010 data->in_min[i] = asb100_read_value(client,
1011 ASB100_REG_IN_MIN(i));
1012 data->in_max[i] = asb100_read_value(client,
1013 ASB100_REG_IN_MAX(i));
1014 }
1015
1016 /* 3 fan inputs */
1017 for (i = 0; i < 3; i++) {
1018 data->fan[i] = asb100_read_value(client,
1019 ASB100_REG_FAN(i));
1020 data->fan_min[i] = asb100_read_value(client,
1021 ASB100_REG_FAN_MIN(i));
1022 }
1023
1024 /* 4 temperature inputs */
1025 for (i = 1; i <= 4; i++) {
1026 data->temp[i-1] = asb100_read_value(client,
1027 ASB100_REG_TEMP(i));
1028 data->temp_max[i-1] = asb100_read_value(client,
1029 ASB100_REG_TEMP_MAX(i));
1030 data->temp_hyst[i-1] = asb100_read_value(client,
1031 ASB100_REG_TEMP_HYST(i));
1032 }
1033
1034 /* VID and fan divisors */
1035 i = asb100_read_value(client, ASB100_REG_VID_FANDIV);
1036 data->vid = i & 0x0f;
1037 data->vid |= (asb100_read_value(client,
1038 ASB100_REG_CHIPID) & 0x01) << 4;
1039 data->fan_div[0] = (i >> 4) & 0x03;
1040 data->fan_div[1] = (i >> 6) & 0x03;
1041 data->fan_div[2] = (asb100_read_value(client,
1042 ASB100_REG_PIN) >> 6) & 0x03;
1043
1044 /* PWM */
1045 data->pwm = asb100_read_value(client, ASB100_REG_PWM1);
1046
1047 /* alarms */
1048 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) +
1049 (asb100_read_value(client, ASB100_REG_ALARM2) << 8);
1050
1051 data->last_updated = jiffies;
1052 data->valid = 1;
1053
1054 dev_dbg(&client->dev, "... device update complete\n");
1055 }
1056
9a61bf63 1057 mutex_unlock(&data->update_lock);
1da177e4
LT		 1058
1059 return data;
1060}
1061
1062static int __init asb100_init(void)
1063{
1064 return i2c_add_driver(&asb100_driver);
1065}
1066
1067static void __exit asb100_exit(void)
1068{
1069 i2c_del_driver(&asb100_driver);
1070}
1071
1072MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
1073MODULE_DESCRIPTION("ASB100 Bach driver");
1074MODULE_LICENSE("GPL");
1075
1076module_init(asb100_init);
1077module_exit(asb100_exit);
1078
Linux kernel - Deliverables
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