blob: 52c469722a6584ea622618dbd99c6c53ff43b329 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040042#include <linux/hwmon.h>
Jean Delvare303760b2005-07-31 21:52:01 +020043#include <linux/hwmon-vid.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040044#include <linux/err.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <linux/init.h>
Dominik Hacklff324092005-05-16 18:12:18 +020046#include <linux/jiffies.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include "lm75.h"
48
49/*
50 HISTORY:
51 2003-12-29 1.0.0 Ported from lm_sensors project for kernel 2.6
52*/
53#define ASB100_VERSION "1.0.0"
54
55/* I2C addresses to scan */
56static unsigned short normal_i2c[] = { 0x2d, I2C_CLIENT_END };
57
Linus Torvalds1da177e2005-04-16 15:20:36 -070058/* Insmod parameters */
Jean Delvaref4b50262005-07-31 21:49:03 +020059I2C_CLIENT_INSMOD_1(asb100);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
61 "{bus, clientaddr, subclientaddr1, subclientaddr2}");
62
63/* Voltage IN registers 0-6 */
64#define ASB100_REG_IN(nr) (0x20 + (nr))
65#define ASB100_REG_IN_MAX(nr) (0x2b + (nr * 2))
66#define ASB100_REG_IN_MIN(nr) (0x2c + (nr * 2))
67
68/* FAN IN registers 1-3 */
69#define ASB100_REG_FAN(nr) (0x28 + (nr))
70#define ASB100_REG_FAN_MIN(nr) (0x3b + (nr))
71
72/* TEMPERATURE registers 1-4 */
73static const u16 asb100_reg_temp[] = {0, 0x27, 0x150, 0x250, 0x17};
74static const u16 asb100_reg_temp_max[] = {0, 0x39, 0x155, 0x255, 0x18};
75static const u16 asb100_reg_temp_hyst[] = {0, 0x3a, 0x153, 0x253, 0x19};
76
77#define ASB100_REG_TEMP(nr) (asb100_reg_temp[nr])
78#define ASB100_REG_TEMP_MAX(nr) (asb100_reg_temp_max[nr])
79#define ASB100_REG_TEMP_HYST(nr) (asb100_reg_temp_hyst[nr])
80
81#define ASB100_REG_TEMP2_CONFIG 0x0152
82#define ASB100_REG_TEMP3_CONFIG 0x0252
83
84
85#define ASB100_REG_CONFIG 0x40
86#define ASB100_REG_ALARM1 0x41
87#define ASB100_REG_ALARM2 0x42
88#define ASB100_REG_SMIM1 0x43
89#define ASB100_REG_SMIM2 0x44
90#define ASB100_REG_VID_FANDIV 0x47
91#define ASB100_REG_I2C_ADDR 0x48
92#define ASB100_REG_CHIPID 0x49
93#define ASB100_REG_I2C_SUBADDR 0x4a
94#define ASB100_REG_PIN 0x4b
95#define ASB100_REG_IRQ 0x4c
96#define ASB100_REG_BANK 0x4e
97#define ASB100_REG_CHIPMAN 0x4f
98
99#define ASB100_REG_WCHIPID 0x58
100
101/* bit 7 -> enable, bits 0-3 -> duty cycle */
102#define ASB100_REG_PWM1 0x59
103
104/* CONVERSIONS
105 Rounding and limit checking is only done on the TO_REG variants. */
106
107/* These constants are a guess, consistent w/ w83781d */
108#define ASB100_IN_MIN ( 0)
109#define ASB100_IN_MAX (4080)
110
111/* IN: 1/1000 V (0V to 4.08V)
112 REG: 16mV/bit */
113static u8 IN_TO_REG(unsigned val)
114{
115 unsigned nval = SENSORS_LIMIT(val, ASB100_IN_MIN, ASB100_IN_MAX);
116 return (nval + 8) / 16;
117}
118
119static unsigned IN_FROM_REG(u8 reg)
120{
121 return reg * 16;
122}
123
124static u8 FAN_TO_REG(long rpm, int div)
125{
126 if (rpm == -1)
127 return 0;
128 if (rpm == 0)
129 return 255;
130 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
131 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
132}
133
134static int FAN_FROM_REG(u8 val, int div)
135{
136 return val==0 ? -1 : val==255 ? 0 : 1350000/(val*div);
137}
138
139/* These constants are a guess, consistent w/ w83781d */
140#define ASB100_TEMP_MIN (-128000)
141#define ASB100_TEMP_MAX ( 127000)
142
143/* TEMP: 0.001C/bit (-128C to +127C)
144 REG: 1C/bit, two's complement */
145static u8 TEMP_TO_REG(int temp)
146{
147 int ntemp = SENSORS_LIMIT(temp, ASB100_TEMP_MIN, ASB100_TEMP_MAX);
148 ntemp += (ntemp<0 ? -500 : 500);
149 return (u8)(ntemp / 1000);
150}
151
152static int TEMP_FROM_REG(u8 reg)
153{
154 return (s8)reg * 1000;
155}
156
157/* PWM: 0 - 255 per sensors documentation
158 REG: (6.25% duty cycle per bit) */
159static u8 ASB100_PWM_TO_REG(int pwm)
160{
161 pwm = SENSORS_LIMIT(pwm, 0, 255);
162 return (u8)(pwm / 16);
163}
164
165static int ASB100_PWM_FROM_REG(u8 reg)
166{
167 return reg * 16;
168}
169
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170#define DIV_FROM_REG(val) (1 << (val))
171
172/* FAN DIV: 1, 2, 4, or 8 (defaults to 2)
173 REG: 0, 1, 2, or 3 (respectively) (defaults to 1) */
174static u8 DIV_TO_REG(long val)
175{
176 return val==8 ? 3 : val==4 ? 2 : val==1 ? 0 : 1;
177}
178
179/* For each registered client, we need to keep some data in memory. That
180 data is pointed to by client->data. The structure itself is
181 dynamically allocated, at the same time the client itself is allocated. */
182struct asb100_data {
183 struct i2c_client client;
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400184 struct class_device *class_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 struct semaphore lock;
186 enum chips type;
187
188 struct semaphore update_lock;
189 unsigned long last_updated; /* In jiffies */
190
191 /* array of 2 pointers to subclients */
192 struct i2c_client *lm75[2];
193
194 char valid; /* !=0 if following fields are valid */
195 u8 in[7]; /* Register value */
196 u8 in_max[7]; /* Register value */
197 u8 in_min[7]; /* Register value */
198 u8 fan[3]; /* Register value */
199 u8 fan_min[3]; /* Register value */
200 u16 temp[4]; /* Register value (0 and 3 are u8 only) */
201 u16 temp_max[4]; /* Register value (0 and 3 are u8 only) */
202 u16 temp_hyst[4]; /* Register value (0 and 3 are u8 only) */
203 u8 fan_div[3]; /* Register encoding, right justified */
204 u8 pwm; /* Register encoding */
205 u8 vid; /* Register encoding, combined */
206 u32 alarms; /* Register encoding, combined */
207 u8 vrm;
208};
209
210static int asb100_read_value(struct i2c_client *client, u16 reg);
211static void asb100_write_value(struct i2c_client *client, u16 reg, u16 val);
212
213static int asb100_attach_adapter(struct i2c_adapter *adapter);
214static int asb100_detect(struct i2c_adapter *adapter, int address, int kind);
215static int asb100_detach_client(struct i2c_client *client);
216static struct asb100_data *asb100_update_device(struct device *dev);
217static void asb100_init_client(struct i2c_client *client);
218
219static struct i2c_driver asb100_driver = {
220 .owner = THIS_MODULE,
221 .name = "asb100",
222 .id = I2C_DRIVERID_ASB100,
223 .flags = I2C_DF_NOTIFY,
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 \
248 down(&data->update_lock); \
249 data->in_##reg[nr] = IN_TO_REG(val); \
250 asb100_write_value(client, ASB100_REG_IN_##REG(nr), \
251 data->in_##reg[nr]); \
252 up(&data->update_lock); \
253 return count; \
254}
255
256set_in_reg(MIN, min)
257set_in_reg(MAX, max)
258
259#define sysfs_in(offset) \
260static ssize_t \
Yani Ioannou30f74292005-05-17 06:41:35 -0400261 show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262{ \
263 return show_in(dev, buf, offset); \
264} \
265static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
266 show_in##offset, NULL); \
267static ssize_t \
Yani Ioannou30f74292005-05-17 06:41:35 -0400268 show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269{ \
270 return show_in_min(dev, buf, offset); \
271} \
272static ssize_t \
Yani Ioannou30f74292005-05-17 06:41:35 -0400273 show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274{ \
275 return show_in_max(dev, buf, offset); \
276} \
Yani Ioannou30f74292005-05-17 06:41:35 -0400277static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 const char *buf, size_t count) \
279{ \
280 return set_in_min(dev, buf, count, offset); \
281} \
Yani Ioannou30f74292005-05-17 06:41:35 -0400282static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 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
300#define device_create_file_in(client, offset) do { \
301 device_create_file(&client->dev, &dev_attr_in##offset##_input); \
302 device_create_file(&client->dev, &dev_attr_in##offset##_min); \
303 device_create_file(&client->dev, &dev_attr_in##offset##_max); \
304} while (0)
305
306/* 3 Fans */
307static ssize_t show_fan(struct device *dev, char *buf, int nr)
308{
309 struct asb100_data *data = asb100_update_device(dev);
310 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
311 DIV_FROM_REG(data->fan_div[nr])));
312}
313
314static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
315{
316 struct asb100_data *data = asb100_update_device(dev);
317 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
318 DIV_FROM_REG(data->fan_div[nr])));
319}
320
321static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
322{
323 struct asb100_data *data = asb100_update_device(dev);
324 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
325}
326
327static ssize_t set_fan_min(struct device *dev, const char *buf,
328 size_t count, int nr)
329{
330 struct i2c_client *client = to_i2c_client(dev);
331 struct asb100_data *data = i2c_get_clientdata(client);
332 u32 val = simple_strtoul(buf, NULL, 10);
333
334 down(&data->update_lock);
335 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
336 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
337 up(&data->update_lock);
338 return count;
339}
340
341/* Note: we save and restore the fan minimum here, because its value is
342 determined in part by the fan divisor. This follows the principle of
343 least suprise; the user doesn't expect the fan minimum to change just
344 because the divisor changed. */
345static ssize_t set_fan_div(struct device *dev, const char *buf,
346 size_t count, int nr)
347{
348 struct i2c_client *client = to_i2c_client(dev);
349 struct asb100_data *data = i2c_get_clientdata(client);
350 unsigned long min;
351 unsigned long val = simple_strtoul(buf, NULL, 10);
352 int reg;
353
354 down(&data->update_lock);
355
356 min = FAN_FROM_REG(data->fan_min[nr],
357 DIV_FROM_REG(data->fan_div[nr]));
358 data->fan_div[nr] = DIV_TO_REG(val);
359
360 switch(nr) {
361 case 0: /* fan 1 */
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);
365 break;
366
367 case 1: /* fan 2 */
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);
371 break;
372
373 case 2: /* fan 3 */
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);
377 break;
378 }
379
380 data->fan_min[nr] =
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]);
383
384 up(&data->update_lock);
385
386 return count;
387}
388
389#define sysfs_fan(offset) \
Yani Ioannou30f74292005-05-17 06:41:35 -0400390static ssize_t show_fan##offset(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391{ \
392 return show_fan(dev, buf, offset - 1); \
393} \
Yani Ioannou30f74292005-05-17 06:41:35 -0400394static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395{ \
396 return show_fan_min(dev, buf, offset - 1); \
397} \
Yani Ioannou30f74292005-05-17 06:41:35 -0400398static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399{ \
400 return show_fan_div(dev, buf, offset - 1); \
401} \
Yani Ioannou30f74292005-05-17 06:41:35 -0400402static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 size_t count) \
404{ \
405 return set_fan_min(dev, buf, count, offset - 1); \
406} \
Yani Ioannou30f74292005-05-17 06:41:35 -0400407static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 size_t count) \
409{ \
410 return set_fan_div(dev, buf, count, offset - 1); \
411} \
412static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
413 show_fan##offset, NULL); \
414static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
415 show_fan##offset##_min, set_fan##offset##_min); \
416static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
417 show_fan##offset##_div, set_fan##offset##_div);
418
419sysfs_fan(1);
420sysfs_fan(2);
421sysfs_fan(3);
422
423#define device_create_file_fan(client, offset) do { \
424 device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
425 device_create_file(&client->dev, &dev_attr_fan##offset##_min); \
426 device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
427} while (0)
428
429/* 4 Temp. Sensors */
430static int sprintf_temp_from_reg(u16 reg, char *buf, int nr)
431{
432 int ret = 0;
433
434 switch (nr) {
435 case 1: case 2:
436 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg));
437 break;
438 case 0: case 3: default:
439 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg));
440 break;
441 }
442 return ret;
443}
444
445#define show_temp_reg(reg) \
446static ssize_t show_##reg(struct device *dev, char *buf, int nr) \
447{ \
448 struct asb100_data *data = asb100_update_device(dev); \
449 return sprintf_temp_from_reg(data->reg[nr], buf, nr); \
450}
451
452show_temp_reg(temp);
453show_temp_reg(temp_max);
454show_temp_reg(temp_hyst);
455
456#define set_temp_reg(REG, reg) \
457static ssize_t set_##reg(struct device *dev, const char *buf, \
458 size_t count, int nr) \
459{ \
460 struct i2c_client *client = to_i2c_client(dev); \
461 struct asb100_data *data = i2c_get_clientdata(client); \
462 unsigned long val = simple_strtoul(buf, NULL, 10); \
463 \
464 down(&data->update_lock); \
465 switch (nr) { \
466 case 1: case 2: \
467 data->reg[nr] = LM75_TEMP_TO_REG(val); \
468 break; \
469 case 0: case 3: default: \
470 data->reg[nr] = TEMP_TO_REG(val); \
471 break; \
472 } \
473 asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \
474 data->reg[nr]); \
475 up(&data->update_lock); \
476 return count; \
477}
478
479set_temp_reg(MAX, temp_max);
480set_temp_reg(HYST, temp_hyst);
481
482#define sysfs_temp(num) \
Yani Ioannou30f74292005-05-17 06:41:35 -0400483static ssize_t show_temp##num(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484{ \
485 return show_temp(dev, buf, num-1); \
486} \
487static DEVICE_ATTR(temp##num##_input, S_IRUGO, show_temp##num, NULL); \
Yani Ioannou30f74292005-05-17 06:41:35 -0400488static ssize_t show_temp_max##num(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489{ \
490 return show_temp_max(dev, buf, num-1); \
491} \
Yani Ioannou30f74292005-05-17 06:41:35 -0400492static ssize_t set_temp_max##num(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 size_t count) \
494{ \
495 return set_temp_max(dev, buf, count, num-1); \
496} \
497static DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \
498 show_temp_max##num, set_temp_max##num); \
Yani Ioannou30f74292005-05-17 06:41:35 -0400499static ssize_t show_temp_hyst##num(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500{ \
501 return show_temp_hyst(dev, buf, num-1); \
502} \
Yani Ioannou30f74292005-05-17 06:41:35 -0400503static ssize_t set_temp_hyst##num(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 size_t count) \
505{ \
506 return set_temp_hyst(dev, buf, count, num-1); \
507} \
508static DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \
509 show_temp_hyst##num, set_temp_hyst##num);
510
511sysfs_temp(1);
512sysfs_temp(2);
513sysfs_temp(3);
514sysfs_temp(4);
515
516/* VID */
517#define device_create_file_temp(client, num) do { \
518 device_create_file(&client->dev, &dev_attr_temp##num##_input); \
519 device_create_file(&client->dev, &dev_attr_temp##num##_max); \
520 device_create_file(&client->dev, &dev_attr_temp##num##_max_hyst); \
521} while (0)
522
Yani Ioannou30f74292005-05-17 06:41:35 -0400523static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524{
525 struct asb100_data *data = asb100_update_device(dev);
526 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
527}
528
529static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
530#define device_create_file_vid(client) \
531device_create_file(&client->dev, &dev_attr_cpu0_vid)
532
533/* VRM */
Yani Ioannou30f74292005-05-17 06:41:35 -0400534static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535{
536 struct asb100_data *data = asb100_update_device(dev);
537 return sprintf(buf, "%d\n", data->vrm);
538}
539
Yani Ioannou30f74292005-05-17 06:41:35 -0400540static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541{
542 struct i2c_client *client = to_i2c_client(dev);
543 struct asb100_data *data = i2c_get_clientdata(client);
544 unsigned long val = simple_strtoul(buf, NULL, 10);
545 data->vrm = val;
546 return count;
547}
548
549/* Alarms */
550static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
551#define device_create_file_vrm(client) \
552device_create_file(&client->dev, &dev_attr_vrm);
553
Yani Ioannou30f74292005-05-17 06:41:35 -0400554static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555{
556 struct asb100_data *data = asb100_update_device(dev);
Jean Delvare68188ba2005-05-16 18:52:38 +0200557 return sprintf(buf, "%u\n", data->alarms);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558}
559
560static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
561#define device_create_file_alarms(client) \
562device_create_file(&client->dev, &dev_attr_alarms)
563
564/* 1 PWM */
Yani Ioannou30f74292005-05-17 06:41:35 -0400565static ssize_t show_pwm1(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566{
567 struct asb100_data *data = asb100_update_device(dev);
568 return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f));
569}
570
Yani Ioannou30f74292005-05-17 06:41:35 -0400571static ssize_t set_pwm1(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572{
573 struct i2c_client *client = to_i2c_client(dev);
574 struct asb100_data *data = i2c_get_clientdata(client);
575 unsigned long val = simple_strtoul(buf, NULL, 10);
576
577 down(&data->update_lock);
578 data->pwm &= 0x80; /* keep the enable bit */
579 data->pwm |= (0x0f & ASB100_PWM_TO_REG(val));
580 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
581 up(&data->update_lock);
582 return count;
583}
584
Yani Ioannou30f74292005-05-17 06:41:35 -0400585static ssize_t show_pwm_enable1(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586{
587 struct asb100_data *data = asb100_update_device(dev);
588 return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0);
589}
590
Yani Ioannou30f74292005-05-17 06:41:35 -0400591static ssize_t set_pwm_enable1(struct device *dev, struct device_attribute *attr, const char *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 size_t count)
593{
594 struct i2c_client *client = to_i2c_client(dev);
595 struct asb100_data *data = i2c_get_clientdata(client);
596 unsigned long val = simple_strtoul(buf, NULL, 10);
597
598 down(&data->update_lock);
599 data->pwm &= 0x0f; /* keep the duty cycle bits */
600 data->pwm |= (val ? 0x80 : 0x00);
601 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
602 up(&data->update_lock);
603 return count;
604}
605
606static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1);
607static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
608 show_pwm_enable1, set_pwm_enable1);
609#define device_create_file_pwm1(client) do { \
610 device_create_file(&new_client->dev, &dev_attr_pwm1); \
611 device_create_file(&new_client->dev, &dev_attr_pwm1_enable); \
612} while (0)
613
614/* This function is called when:
615 asb100_driver is inserted (when this module is loaded), for each
616 available adapter
617 when a new adapter is inserted (and asb100_driver is still present)
618 */
619static int asb100_attach_adapter(struct i2c_adapter *adapter)
620{
621 if (!(adapter->class & I2C_CLASS_HWMON))
622 return 0;
Jean Delvare2ed2dc32005-07-31 21:42:02 +0200623 return i2c_probe(adapter, &addr_data, asb100_detect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624}
625
626static int asb100_detect_subclients(struct i2c_adapter *adapter, int address,
627 int kind, struct i2c_client *new_client)
628{
629 int i, id, err;
630 struct asb100_data *data = i2c_get_clientdata(new_client);
631
Deepak Saxenaba9c2e82005-10-17 23:08:32 +0200632 data->lm75[0] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 if (!(data->lm75[0])) {
634 err = -ENOMEM;
635 goto ERROR_SC_0;
636 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637
Deepak Saxenaba9c2e82005-10-17 23:08:32 +0200638 data->lm75[1] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 if (!(data->lm75[1])) {
640 err = -ENOMEM;
641 goto ERROR_SC_1;
642 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643
644 id = i2c_adapter_id(adapter);
645
646 if (force_subclients[0] == id && force_subclients[1] == address) {
647 for (i = 2; i <= 3; i++) {
648 if (force_subclients[i] < 0x48 ||
649 force_subclients[i] > 0x4f) {
650 dev_err(&new_client->dev, "invalid subclient "
651 "address %d; must be 0x48-0x4f\n",
652 force_subclients[i]);
653 err = -ENODEV;
654 goto ERROR_SC_2;
655 }
656 }
657 asb100_write_value(new_client, ASB100_REG_I2C_SUBADDR,
658 (force_subclients[2] & 0x07) |
659 ((force_subclients[3] & 0x07) <<4));
660 data->lm75[0]->addr = force_subclients[2];
661 data->lm75[1]->addr = force_subclients[3];
662 } else {
663 int val = asb100_read_value(new_client, ASB100_REG_I2C_SUBADDR);
664 data->lm75[0]->addr = 0x48 + (val & 0x07);
665 data->lm75[1]->addr = 0x48 + ((val >> 4) & 0x07);
666 }
667
668 if(data->lm75[0]->addr == data->lm75[1]->addr) {
669 dev_err(&new_client->dev, "duplicate addresses 0x%x "
670 "for subclients\n", data->lm75[0]->addr);
671 err = -ENODEV;
672 goto ERROR_SC_2;
673 }
674
675 for (i = 0; i <= 1; i++) {
676 i2c_set_clientdata(data->lm75[i], NULL);
677 data->lm75[i]->adapter = adapter;
678 data->lm75[i]->driver = &asb100_driver;
679 data->lm75[i]->flags = 0;
680 strlcpy(data->lm75[i]->name, "asb100 subclient", I2C_NAME_SIZE);
681 }
682
683 if ((err = i2c_attach_client(data->lm75[0]))) {
684 dev_err(&new_client->dev, "subclient %d registration "
685 "at address 0x%x failed.\n", i, data->lm75[0]->addr);
686 goto ERROR_SC_2;
687 }
688
689 if ((err = i2c_attach_client(data->lm75[1]))) {
690 dev_err(&new_client->dev, "subclient %d registration "
691 "at address 0x%x failed.\n", i, data->lm75[1]->addr);
692 goto ERROR_SC_3;
693 }
694
695 return 0;
696
697/* Undo inits in case of errors */
698ERROR_SC_3:
699 i2c_detach_client(data->lm75[0]);
700ERROR_SC_2:
701 kfree(data->lm75[1]);
702ERROR_SC_1:
703 kfree(data->lm75[0]);
704ERROR_SC_0:
705 return err;
706}
707
708static int asb100_detect(struct i2c_adapter *adapter, int address, int kind)
709{
710 int err;
711 struct i2c_client *new_client;
712 struct asb100_data *data;
713
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
715 pr_debug("asb100.o: detect failed, "
716 "smbus byte data not supported!\n");
717 err = -ENODEV;
718 goto ERROR0;
719 }
720
721 /* OK. For now, we presume we have a valid client. We now create the
722 client structure, even though we cannot fill it completely yet.
723 But it allows us to access asb100_{read,write}_value. */
724
Deepak Saxenaba9c2e82005-10-17 23:08:32 +0200725 if (!(data = kzalloc(sizeof(struct asb100_data), GFP_KERNEL))) {
726 pr_debug("asb100.o: detect failed, kzalloc failed!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 err = -ENOMEM;
728 goto ERROR0;
729 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730
731 new_client = &data->client;
732 init_MUTEX(&data->lock);
733 i2c_set_clientdata(new_client, data);
734 new_client->addr = address;
735 new_client->adapter = adapter;
736 new_client->driver = &asb100_driver;
737 new_client->flags = 0;
738
739 /* Now, we do the remaining detection. */
740
741 /* The chip may be stuck in some other bank than bank 0. This may
742 make reading other information impossible. Specify a force=... or
743 force_*=... parameter, and the chip will be reset to the right
744 bank. */
745 if (kind < 0) {
746
747 int val1 = asb100_read_value(new_client, ASB100_REG_BANK);
748 int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
749
750 /* If we're in bank 0 */
751 if ( (!(val1 & 0x07)) &&
752 /* Check for ASB100 ID (low byte) */
753 ( ((!(val1 & 0x80)) && (val2 != 0x94)) ||
754 /* Check for ASB100 ID (high byte ) */
755 ((val1 & 0x80) && (val2 != 0x06)) ) ) {
756 pr_debug("asb100.o: detect failed, "
757 "bad chip id 0x%02x!\n", val2);
758 err = -ENODEV;
759 goto ERROR1;
760 }
761
762 } /* kind < 0 */
763
764 /* We have either had a force parameter, or we have already detected
765 Winbond. Put it now into bank 0 and Vendor ID High Byte */
766 asb100_write_value(new_client, ASB100_REG_BANK,
767 (asb100_read_value(new_client, ASB100_REG_BANK) & 0x78) | 0x80);
768
769 /* Determine the chip type. */
770 if (kind <= 0) {
771 int val1 = asb100_read_value(new_client, ASB100_REG_WCHIPID);
772 int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
773
774 if ((val1 == 0x31) && (val2 == 0x06))
775 kind = asb100;
776 else {
777 if (kind == 0)
778 dev_warn(&new_client->dev, "ignoring "
779 "'force' parameter for unknown chip "
780 "at adapter %d, address 0x%02x.\n",
781 i2c_adapter_id(adapter), address);
782 err = -ENODEV;
783 goto ERROR1;
784 }
785 }
786
787 /* Fill in remaining client fields and put it into the global list */
788 strlcpy(new_client->name, "asb100", I2C_NAME_SIZE);
789 data->type = kind;
790
791 data->valid = 0;
792 init_MUTEX(&data->update_lock);
793
794 /* Tell the I2C layer a new client has arrived */
795 if ((err = i2c_attach_client(new_client)))
796 goto ERROR1;
797
798 /* Attach secondary lm75 clients */
799 if ((err = asb100_detect_subclients(adapter, address, kind,
800 new_client)))
801 goto ERROR2;
802
803 /* Initialize the chip */
804 asb100_init_client(new_client);
805
806 /* A few vars need to be filled upon startup */
807 data->fan_min[0] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(0));
808 data->fan_min[1] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(1));
809 data->fan_min[2] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(2));
810
811 /* Register sysfs hooks */
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400812 data->class_dev = hwmon_device_register(&new_client->dev);
813 if (IS_ERR(data->class_dev)) {
814 err = PTR_ERR(data->class_dev);
815 goto ERROR3;
816 }
817
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 device_create_file_in(new_client, 0);
819 device_create_file_in(new_client, 1);
820 device_create_file_in(new_client, 2);
821 device_create_file_in(new_client, 3);
822 device_create_file_in(new_client, 4);
823 device_create_file_in(new_client, 5);
824 device_create_file_in(new_client, 6);
825
826 device_create_file_fan(new_client, 1);
827 device_create_file_fan(new_client, 2);
828 device_create_file_fan(new_client, 3);
829
830 device_create_file_temp(new_client, 1);
831 device_create_file_temp(new_client, 2);
832 device_create_file_temp(new_client, 3);
833 device_create_file_temp(new_client, 4);
834
835 device_create_file_vid(new_client);
836 device_create_file_vrm(new_client);
837
838 device_create_file_alarms(new_client);
839
840 device_create_file_pwm1(new_client);
841
842 return 0;
843
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400844ERROR3:
845 i2c_detach_client(data->lm75[1]);
846 i2c_detach_client(data->lm75[0]);
847 kfree(data->lm75[1]);
848 kfree(data->lm75[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849ERROR2:
850 i2c_detach_client(new_client);
851ERROR1:
852 kfree(data);
853ERROR0:
854 return err;
855}
856
857static int asb100_detach_client(struct i2c_client *client)
858{
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400859 struct asb100_data *data = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860 int err;
861
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400862 /* main client */
863 if (data)
864 hwmon_device_unregister(data->class_dev);
865
Jean Delvare7bef5592005-07-27 22:14:49 +0200866 if ((err = i2c_detach_client(client)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400869 /* main client */
870 if (data)
871 kfree(data);
872
873 /* subclient */
874 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 kfree(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876
877 return 0;
878}
879
880/* The SMBus locks itself, usually, but nothing may access the chip between
881 bank switches. */
882static int asb100_read_value(struct i2c_client *client, u16 reg)
883{
884 struct asb100_data *data = i2c_get_clientdata(client);
885 struct i2c_client *cl;
886 int res, bank;
887
888 down(&data->lock);
889
890 bank = (reg >> 8) & 0x0f;
891 if (bank > 2)
892 /* switch banks */
893 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
894
895 if (bank == 0 || bank > 2) {
896 res = i2c_smbus_read_byte_data(client, reg & 0xff);
897 } else {
898 /* switch to subclient */
899 cl = data->lm75[bank - 1];
900
901 /* convert from ISA to LM75 I2C addresses */
902 switch (reg & 0xff) {
903 case 0x50: /* TEMP */
904 res = swab16(i2c_smbus_read_word_data (cl, 0));
905 break;
906 case 0x52: /* CONFIG */
907 res = i2c_smbus_read_byte_data(cl, 1);
908 break;
909 case 0x53: /* HYST */
910 res = swab16(i2c_smbus_read_word_data (cl, 2));
911 break;
912 case 0x55: /* MAX */
913 default:
914 res = swab16(i2c_smbus_read_word_data (cl, 3));
915 break;
916 }
917 }
918
919 if (bank > 2)
920 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
921
922 up(&data->lock);
923
924 return res;
925}
926
927static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value)
928{
929 struct asb100_data *data = i2c_get_clientdata(client);
930 struct i2c_client *cl;
931 int bank;
932
933 down(&data->lock);
934
935 bank = (reg >> 8) & 0x0f;
936 if (bank > 2)
937 /* switch banks */
938 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
939
940 if (bank == 0 || bank > 2) {
941 i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff);
942 } else {
943 /* switch to subclient */
944 cl = data->lm75[bank - 1];
945
946 /* convert from ISA to LM75 I2C addresses */
947 switch (reg & 0xff) {
948 case 0x52: /* CONFIG */
949 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
950 break;
951 case 0x53: /* HYST */
952 i2c_smbus_write_word_data(cl, 2, swab16(value));
953 break;
954 case 0x55: /* MAX */
955 i2c_smbus_write_word_data(cl, 3, swab16(value));
956 break;
957 }
958 }
959
960 if (bank > 2)
961 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
962
963 up(&data->lock);
964}
965
966static void asb100_init_client(struct i2c_client *client)
967{
968 struct asb100_data *data = i2c_get_clientdata(client);
969 int vid = 0;
970
971 vid = asb100_read_value(client, ASB100_REG_VID_FANDIV) & 0x0f;
972 vid |= (asb100_read_value(client, ASB100_REG_CHIPID) & 0x01) << 4;
Jean Delvare303760b2005-07-31 21:52:01 +0200973 data->vrm = vid_which_vrm();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 vid = vid_from_reg(vid, data->vrm);
975
976 /* Start monitoring */
977 asb100_write_value(client, ASB100_REG_CONFIG,
978 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01);
979}
980
981static struct asb100_data *asb100_update_device(struct device *dev)
982{
983 struct i2c_client *client = to_i2c_client(dev);
984 struct asb100_data *data = i2c_get_clientdata(client);
985 int i;
986
987 down(&data->update_lock);
988
989 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
990 || !data->valid) {
991
992 dev_dbg(&client->dev, "starting device update...\n");
993
994 /* 7 voltage inputs */
995 for (i = 0; i < 7; i++) {
996 data->in[i] = asb100_read_value(client,
997 ASB100_REG_IN(i));
998 data->in_min[i] = asb100_read_value(client,
999 ASB100_REG_IN_MIN(i));
1000 data->in_max[i] = asb100_read_value(client,
1001 ASB100_REG_IN_MAX(i));
1002 }
1003
1004 /* 3 fan inputs */
1005 for (i = 0; i < 3; i++) {
1006 data->fan[i] = asb100_read_value(client,
1007 ASB100_REG_FAN(i));
1008 data->fan_min[i] = asb100_read_value(client,
1009 ASB100_REG_FAN_MIN(i));
1010 }
1011
1012 /* 4 temperature inputs */
1013 for (i = 1; i <= 4; i++) {
1014 data->temp[i-1] = asb100_read_value(client,
1015 ASB100_REG_TEMP(i));
1016 data->temp_max[i-1] = asb100_read_value(client,
1017 ASB100_REG_TEMP_MAX(i));
1018 data->temp_hyst[i-1] = asb100_read_value(client,
1019 ASB100_REG_TEMP_HYST(i));
1020 }
1021
1022 /* VID and fan divisors */
1023 i = asb100_read_value(client, ASB100_REG_VID_FANDIV);
1024 data->vid = i & 0x0f;
1025 data->vid |= (asb100_read_value(client,
1026 ASB100_REG_CHIPID) & 0x01) << 4;
1027 data->fan_div[0] = (i >> 4) & 0x03;
1028 data->fan_div[1] = (i >> 6) & 0x03;
1029 data->fan_div[2] = (asb100_read_value(client,
1030 ASB100_REG_PIN) >> 6) & 0x03;
1031
1032 /* PWM */
1033 data->pwm = asb100_read_value(client, ASB100_REG_PWM1);
1034
1035 /* alarms */
1036 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) +
1037 (asb100_read_value(client, ASB100_REG_ALARM2) << 8);
1038
1039 data->last_updated = jiffies;
1040 data->valid = 1;
1041
1042 dev_dbg(&client->dev, "... device update complete\n");
1043 }
1044
1045 up(&data->update_lock);
1046
1047 return data;
1048}
1049
1050static int __init asb100_init(void)
1051{
1052 return i2c_add_driver(&asb100_driver);
1053}
1054
1055static void __exit asb100_exit(void)
1056{
1057 i2c_del_driver(&asb100_driver);
1058}
1059
1060MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
1061MODULE_DESCRIPTION("ASB100 Bach driver");
1062MODULE_LICENSE("GPL");
1063
1064module_init(asb100_init);
1065module_exit(asb100_exit);
1066