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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>
42#include <linux/i2c-sensor.h>
43#include <linux/i2c-vid.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040044#include <linux/hwmon.h>
45#include <linux/err.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <linux/init.h>
Dominik Hacklff324092005-05-16 18:12:18 +020047#include <linux/jiffies.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070059/* Insmod parameters */
60SENSORS_INSMOD_1(asb100);
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 */
146static u8 TEMP_TO_REG(int temp)
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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171#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;
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400185 struct class_device *class_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 struct semaphore lock;
187 enum chips type;
188
189 struct semaphore update_lock;
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 = {
221 .owner = THIS_MODULE,
222 .name = "asb100",
223 .id = I2C_DRIVERID_ASB100,
224 .flags = I2C_DF_NOTIFY,
225 .attach_adapter = asb100_attach_adapter,
226 .detach_client = asb100_detach_client,
227};
228
229/* 7 Voltages */
230#define show_in_reg(reg) \
231static ssize_t show_##reg (struct device *dev, char *buf, int nr) \
232{ \
233 struct asb100_data *data = asb100_update_device(dev); \
234 return sprintf(buf, "%d\n", IN_FROM_REG(data->reg[nr])); \
235}
236
237show_in_reg(in)
238show_in_reg(in_min)
239show_in_reg(in_max)
240
241#define set_in_reg(REG, reg) \
242static ssize_t set_in_##reg(struct device *dev, const char *buf, \
243 size_t count, int nr) \
244{ \
245 struct i2c_client *client = to_i2c_client(dev); \
246 struct asb100_data *data = i2c_get_clientdata(client); \
247 unsigned long val = simple_strtoul(buf, NULL, 10); \
248 \
249 down(&data->update_lock); \
250 data->in_##reg[nr] = IN_TO_REG(val); \
251 asb100_write_value(client, ASB100_REG_IN_##REG(nr), \
252 data->in_##reg[nr]); \
253 up(&data->update_lock); \
254 return count; \
255}
256
257set_in_reg(MIN, min)
258set_in_reg(MAX, max)
259
260#define sysfs_in(offset) \
261static ssize_t \
Yani Ioannou30f74292005-05-17 06:41:35 -0400262 show_in##offset (struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263{ \
264 return show_in(dev, buf, offset); \
265} \
266static DEVICE_ATTR(in##offset##_input, S_IRUGO, \
267 show_in##offset, NULL); \
268static ssize_t \
Yani Ioannou30f74292005-05-17 06:41:35 -0400269 show_in##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270{ \
271 return show_in_min(dev, buf, offset); \
272} \
273static ssize_t \
Yani Ioannou30f74292005-05-17 06:41:35 -0400274 show_in##offset##_max (struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275{ \
276 return show_in_max(dev, buf, offset); \
277} \
Yani Ioannou30f74292005-05-17 06:41:35 -0400278static ssize_t set_in##offset##_min (struct device *dev, struct device_attribute *attr, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 const char *buf, size_t count) \
280{ \
281 return set_in_min(dev, buf, count, offset); \
282} \
Yani Ioannou30f74292005-05-17 06:41:35 -0400283static ssize_t set_in##offset##_max (struct device *dev, struct device_attribute *attr, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 const char *buf, size_t count) \
285{ \
286 return set_in_max(dev, buf, count, offset); \
287} \
288static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
289 show_in##offset##_min, set_in##offset##_min); \
290static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
291 show_in##offset##_max, set_in##offset##_max);
292
293sysfs_in(0);
294sysfs_in(1);
295sysfs_in(2);
296sysfs_in(3);
297sysfs_in(4);
298sysfs_in(5);
299sysfs_in(6);
300
301#define device_create_file_in(client, offset) do { \
302 device_create_file(&client->dev, &dev_attr_in##offset##_input); \
303 device_create_file(&client->dev, &dev_attr_in##offset##_min); \
304 device_create_file(&client->dev, &dev_attr_in##offset##_max); \
305} while (0)
306
307/* 3 Fans */
308static ssize_t show_fan(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[nr],
312 DIV_FROM_REG(data->fan_div[nr])));
313}
314
315static ssize_t show_fan_min(struct device *dev, char *buf, int nr)
316{
317 struct asb100_data *data = asb100_update_device(dev);
318 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
319 DIV_FROM_REG(data->fan_div[nr])));
320}
321
322static ssize_t show_fan_div(struct device *dev, char *buf, int nr)
323{
324 struct asb100_data *data = asb100_update_device(dev);
325 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
326}
327
328static ssize_t set_fan_min(struct device *dev, const char *buf,
329 size_t count, int nr)
330{
331 struct i2c_client *client = to_i2c_client(dev);
332 struct asb100_data *data = i2c_get_clientdata(client);
333 u32 val = simple_strtoul(buf, NULL, 10);
334
335 down(&data->update_lock);
336 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
337 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
338 up(&data->update_lock);
339 return count;
340}
341
342/* Note: we save and restore the fan minimum here, because its value is
343 determined in part by the fan divisor. This follows the principle of
344 least suprise; the user doesn't expect the fan minimum to change just
345 because the divisor changed. */
346static ssize_t set_fan_div(struct device *dev, const char *buf,
347 size_t count, int nr)
348{
349 struct i2c_client *client = to_i2c_client(dev);
350 struct asb100_data *data = i2c_get_clientdata(client);
351 unsigned long min;
352 unsigned long val = simple_strtoul(buf, NULL, 10);
353 int reg;
354
355 down(&data->update_lock);
356
357 min = FAN_FROM_REG(data->fan_min[nr],
358 DIV_FROM_REG(data->fan_div[nr]));
359 data->fan_div[nr] = DIV_TO_REG(val);
360
361 switch(nr) {
362 case 0: /* fan 1 */
363 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
364 reg = (reg & 0xcf) | (data->fan_div[0] << 4);
365 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
366 break;
367
368 case 1: /* fan 2 */
369 reg = asb100_read_value(client, ASB100_REG_VID_FANDIV);
370 reg = (reg & 0x3f) | (data->fan_div[1] << 6);
371 asb100_write_value(client, ASB100_REG_VID_FANDIV, reg);
372 break;
373
374 case 2: /* fan 3 */
375 reg = asb100_read_value(client, ASB100_REG_PIN);
376 reg = (reg & 0x3f) | (data->fan_div[2] << 6);
377 asb100_write_value(client, ASB100_REG_PIN, reg);
378 break;
379 }
380
381 data->fan_min[nr] =
382 FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
383 asb100_write_value(client, ASB100_REG_FAN_MIN(nr), data->fan_min[nr]);
384
385 up(&data->update_lock);
386
387 return count;
388}
389
390#define sysfs_fan(offset) \
Yani Ioannou30f74292005-05-17 06:41:35 -0400391static ssize_t show_fan##offset(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392{ \
393 return show_fan(dev, buf, offset - 1); \
394} \
Yani Ioannou30f74292005-05-17 06:41:35 -0400395static ssize_t show_fan##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396{ \
397 return show_fan_min(dev, buf, offset - 1); \
398} \
Yani Ioannou30f74292005-05-17 06:41:35 -0400399static ssize_t show_fan##offset##_div(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400{ \
401 return show_fan_div(dev, buf, offset - 1); \
402} \
Yani Ioannou30f74292005-05-17 06:41:35 -0400403static ssize_t set_fan##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 size_t count) \
405{ \
406 return set_fan_min(dev, buf, count, offset - 1); \
407} \
Yani Ioannou30f74292005-05-17 06:41:35 -0400408static ssize_t set_fan##offset##_div(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 size_t count) \
410{ \
411 return set_fan_div(dev, buf, count, offset - 1); \
412} \
413static DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
414 show_fan##offset, NULL); \
415static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
416 show_fan##offset##_min, set_fan##offset##_min); \
417static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
418 show_fan##offset##_div, set_fan##offset##_div);
419
420sysfs_fan(1);
421sysfs_fan(2);
422sysfs_fan(3);
423
424#define device_create_file_fan(client, offset) do { \
425 device_create_file(&client->dev, &dev_attr_fan##offset##_input); \
426 device_create_file(&client->dev, &dev_attr_fan##offset##_min); \
427 device_create_file(&client->dev, &dev_attr_fan##offset##_div); \
428} while (0)
429
430/* 4 Temp. Sensors */
431static int sprintf_temp_from_reg(u16 reg, char *buf, int nr)
432{
433 int ret = 0;
434
435 switch (nr) {
436 case 1: case 2:
437 ret = sprintf(buf, "%d\n", LM75_TEMP_FROM_REG(reg));
438 break;
439 case 0: case 3: default:
440 ret = sprintf(buf, "%d\n", TEMP_FROM_REG(reg));
441 break;
442 }
443 return ret;
444}
445
446#define show_temp_reg(reg) \
447static ssize_t show_##reg(struct device *dev, char *buf, int nr) \
448{ \
449 struct asb100_data *data = asb100_update_device(dev); \
450 return sprintf_temp_from_reg(data->reg[nr], buf, nr); \
451}
452
453show_temp_reg(temp);
454show_temp_reg(temp_max);
455show_temp_reg(temp_hyst);
456
457#define set_temp_reg(REG, reg) \
458static ssize_t set_##reg(struct device *dev, const char *buf, \
459 size_t count, int nr) \
460{ \
461 struct i2c_client *client = to_i2c_client(dev); \
462 struct asb100_data *data = i2c_get_clientdata(client); \
463 unsigned long val = simple_strtoul(buf, NULL, 10); \
464 \
465 down(&data->update_lock); \
466 switch (nr) { \
467 case 1: case 2: \
468 data->reg[nr] = LM75_TEMP_TO_REG(val); \
469 break; \
470 case 0: case 3: default: \
471 data->reg[nr] = TEMP_TO_REG(val); \
472 break; \
473 } \
474 asb100_write_value(client, ASB100_REG_TEMP_##REG(nr+1), \
475 data->reg[nr]); \
476 up(&data->update_lock); \
477 return count; \
478}
479
480set_temp_reg(MAX, temp_max);
481set_temp_reg(HYST, temp_hyst);
482
483#define sysfs_temp(num) \
Yani Ioannou30f74292005-05-17 06:41:35 -0400484static ssize_t show_temp##num(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485{ \
486 return show_temp(dev, buf, num-1); \
487} \
488static DEVICE_ATTR(temp##num##_input, S_IRUGO, show_temp##num, NULL); \
Yani Ioannou30f74292005-05-17 06:41:35 -0400489static ssize_t show_temp_max##num(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490{ \
491 return show_temp_max(dev, buf, num-1); \
492} \
Yani Ioannou30f74292005-05-17 06:41:35 -0400493static ssize_t set_temp_max##num(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 size_t count) \
495{ \
496 return set_temp_max(dev, buf, count, num-1); \
497} \
498static DEVICE_ATTR(temp##num##_max, S_IRUGO | S_IWUSR, \
499 show_temp_max##num, set_temp_max##num); \
Yani Ioannou30f74292005-05-17 06:41:35 -0400500static ssize_t show_temp_hyst##num(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501{ \
502 return show_temp_hyst(dev, buf, num-1); \
503} \
Yani Ioannou30f74292005-05-17 06:41:35 -0400504static ssize_t set_temp_hyst##num(struct device *dev, struct device_attribute *attr, const char *buf, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 size_t count) \
506{ \
507 return set_temp_hyst(dev, buf, count, num-1); \
508} \
509static DEVICE_ATTR(temp##num##_max_hyst, S_IRUGO | S_IWUSR, \
510 show_temp_hyst##num, set_temp_hyst##num);
511
512sysfs_temp(1);
513sysfs_temp(2);
514sysfs_temp(3);
515sysfs_temp(4);
516
517/* VID */
518#define device_create_file_temp(client, num) do { \
519 device_create_file(&client->dev, &dev_attr_temp##num##_input); \
520 device_create_file(&client->dev, &dev_attr_temp##num##_max); \
521 device_create_file(&client->dev, &dev_attr_temp##num##_max_hyst); \
522} while (0)
523
Yani Ioannou30f74292005-05-17 06:41:35 -0400524static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525{
526 struct asb100_data *data = asb100_update_device(dev);
527 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
528}
529
530static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
531#define device_create_file_vid(client) \
532device_create_file(&client->dev, &dev_attr_cpu0_vid)
533
534/* VRM */
Yani Ioannou30f74292005-05-17 06:41:35 -0400535static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536{
537 struct asb100_data *data = asb100_update_device(dev);
538 return sprintf(buf, "%d\n", data->vrm);
539}
540
Yani Ioannou30f74292005-05-17 06:41:35 -0400541static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542{
543 struct i2c_client *client = to_i2c_client(dev);
544 struct asb100_data *data = i2c_get_clientdata(client);
545 unsigned long val = simple_strtoul(buf, NULL, 10);
546 data->vrm = val;
547 return count;
548}
549
550/* Alarms */
551static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
552#define device_create_file_vrm(client) \
553device_create_file(&client->dev, &dev_attr_vrm);
554
Yani Ioannou30f74292005-05-17 06:41:35 -0400555static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556{
557 struct asb100_data *data = asb100_update_device(dev);
Jean Delvare68188ba2005-05-16 18:52:38 +0200558 return sprintf(buf, "%u\n", data->alarms);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559}
560
561static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
562#define device_create_file_alarms(client) \
563device_create_file(&client->dev, &dev_attr_alarms)
564
565/* 1 PWM */
Yani Ioannou30f74292005-05-17 06:41:35 -0400566static ssize_t show_pwm1(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567{
568 struct asb100_data *data = asb100_update_device(dev);
569 return sprintf(buf, "%d\n", ASB100_PWM_FROM_REG(data->pwm & 0x0f));
570}
571
Yani Ioannou30f74292005-05-17 06:41:35 -0400572static ssize_t set_pwm1(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573{
574 struct i2c_client *client = to_i2c_client(dev);
575 struct asb100_data *data = i2c_get_clientdata(client);
576 unsigned long val = simple_strtoul(buf, NULL, 10);
577
578 down(&data->update_lock);
579 data->pwm &= 0x80; /* keep the enable bit */
580 data->pwm |= (0x0f & ASB100_PWM_TO_REG(val));
581 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
582 up(&data->update_lock);
583 return count;
584}
585
Yani Ioannou30f74292005-05-17 06:41:35 -0400586static ssize_t show_pwm_enable1(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587{
588 struct asb100_data *data = asb100_update_device(dev);
589 return sprintf(buf, "%d\n", (data->pwm & 0x80) ? 1 : 0);
590}
591
Yani Ioannou30f74292005-05-17 06:41:35 -0400592static ssize_t set_pwm_enable1(struct device *dev, struct device_attribute *attr, const char *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 size_t count)
594{
595 struct i2c_client *client = to_i2c_client(dev);
596 struct asb100_data *data = i2c_get_clientdata(client);
597 unsigned long val = simple_strtoul(buf, NULL, 10);
598
599 down(&data->update_lock);
600 data->pwm &= 0x0f; /* keep the duty cycle bits */
601 data->pwm |= (val ? 0x80 : 0x00);
602 asb100_write_value(client, ASB100_REG_PWM1, data->pwm);
603 up(&data->update_lock);
604 return count;
605}
606
607static DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm1, set_pwm1);
608static DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
609 show_pwm_enable1, set_pwm_enable1);
610#define device_create_file_pwm1(client) do { \
611 device_create_file(&new_client->dev, &dev_attr_pwm1); \
612 device_create_file(&new_client->dev, &dev_attr_pwm1_enable); \
613} while (0)
614
615/* This function is called when:
616 asb100_driver is inserted (when this module is loaded), for each
617 available adapter
618 when a new adapter is inserted (and asb100_driver is still present)
619 */
620static int asb100_attach_adapter(struct i2c_adapter *adapter)
621{
622 if (!(adapter->class & I2C_CLASS_HWMON))
623 return 0;
624 return i2c_detect(adapter, &addr_data, asb100_detect);
625}
626
627static int asb100_detect_subclients(struct i2c_adapter *adapter, int address,
628 int kind, struct i2c_client *new_client)
629{
630 int i, id, err;
631 struct asb100_data *data = i2c_get_clientdata(new_client);
632
633 data->lm75[0] = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
634 if (!(data->lm75[0])) {
635 err = -ENOMEM;
636 goto ERROR_SC_0;
637 }
638 memset(data->lm75[0], 0x00, sizeof(struct i2c_client));
639
640 data->lm75[1] = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
641 if (!(data->lm75[1])) {
642 err = -ENOMEM;
643 goto ERROR_SC_1;
644 }
645 memset(data->lm75[1], 0x00, sizeof(struct i2c_client));
646
647 id = i2c_adapter_id(adapter);
648
649 if (force_subclients[0] == id && force_subclients[1] == address) {
650 for (i = 2; i <= 3; i++) {
651 if (force_subclients[i] < 0x48 ||
652 force_subclients[i] > 0x4f) {
653 dev_err(&new_client->dev, "invalid subclient "
654 "address %d; must be 0x48-0x4f\n",
655 force_subclients[i]);
656 err = -ENODEV;
657 goto ERROR_SC_2;
658 }
659 }
660 asb100_write_value(new_client, ASB100_REG_I2C_SUBADDR,
661 (force_subclients[2] & 0x07) |
662 ((force_subclients[3] & 0x07) <<4));
663 data->lm75[0]->addr = force_subclients[2];
664 data->lm75[1]->addr = force_subclients[3];
665 } else {
666 int val = asb100_read_value(new_client, ASB100_REG_I2C_SUBADDR);
667 data->lm75[0]->addr = 0x48 + (val & 0x07);
668 data->lm75[1]->addr = 0x48 + ((val >> 4) & 0x07);
669 }
670
671 if(data->lm75[0]->addr == data->lm75[1]->addr) {
672 dev_err(&new_client->dev, "duplicate addresses 0x%x "
673 "for subclients\n", data->lm75[0]->addr);
674 err = -ENODEV;
675 goto ERROR_SC_2;
676 }
677
678 for (i = 0; i <= 1; i++) {
679 i2c_set_clientdata(data->lm75[i], NULL);
680 data->lm75[i]->adapter = adapter;
681 data->lm75[i]->driver = &asb100_driver;
682 data->lm75[i]->flags = 0;
683 strlcpy(data->lm75[i]->name, "asb100 subclient", I2C_NAME_SIZE);
684 }
685
686 if ((err = i2c_attach_client(data->lm75[0]))) {
687 dev_err(&new_client->dev, "subclient %d registration "
688 "at address 0x%x failed.\n", i, data->lm75[0]->addr);
689 goto ERROR_SC_2;
690 }
691
692 if ((err = i2c_attach_client(data->lm75[1]))) {
693 dev_err(&new_client->dev, "subclient %d registration "
694 "at address 0x%x failed.\n", i, data->lm75[1]->addr);
695 goto ERROR_SC_3;
696 }
697
698 return 0;
699
700/* Undo inits in case of errors */
701ERROR_SC_3:
702 i2c_detach_client(data->lm75[0]);
703ERROR_SC_2:
704 kfree(data->lm75[1]);
705ERROR_SC_1:
706 kfree(data->lm75[0]);
707ERROR_SC_0:
708 return err;
709}
710
711static int asb100_detect(struct i2c_adapter *adapter, int address, int kind)
712{
713 int err;
714 struct i2c_client *new_client;
715 struct asb100_data *data;
716
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
718 pr_debug("asb100.o: detect failed, "
719 "smbus byte data not supported!\n");
720 err = -ENODEV;
721 goto ERROR0;
722 }
723
724 /* OK. For now, we presume we have a valid client. We now create the
725 client structure, even though we cannot fill it completely yet.
726 But it allows us to access asb100_{read,write}_value. */
727
728 if (!(data = kmalloc(sizeof(struct asb100_data), GFP_KERNEL))) {
729 pr_debug("asb100.o: detect failed, kmalloc failed!\n");
730 err = -ENOMEM;
731 goto ERROR0;
732 }
733 memset(data, 0, sizeof(struct asb100_data));
734
735 new_client = &data->client;
736 init_MUTEX(&data->lock);
737 i2c_set_clientdata(new_client, data);
738 new_client->addr = address;
739 new_client->adapter = adapter;
740 new_client->driver = &asb100_driver;
741 new_client->flags = 0;
742
743 /* Now, we do the remaining detection. */
744
745 /* The chip may be stuck in some other bank than bank 0. This may
746 make reading other information impossible. Specify a force=... or
747 force_*=... parameter, and the chip will be reset to the right
748 bank. */
749 if (kind < 0) {
750
751 int val1 = asb100_read_value(new_client, ASB100_REG_BANK);
752 int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
753
754 /* If we're in bank 0 */
755 if ( (!(val1 & 0x07)) &&
756 /* Check for ASB100 ID (low byte) */
757 ( ((!(val1 & 0x80)) && (val2 != 0x94)) ||
758 /* Check for ASB100 ID (high byte ) */
759 ((val1 & 0x80) && (val2 != 0x06)) ) ) {
760 pr_debug("asb100.o: detect failed, "
761 "bad chip id 0x%02x!\n", val2);
762 err = -ENODEV;
763 goto ERROR1;
764 }
765
766 } /* kind < 0 */
767
768 /* We have either had a force parameter, or we have already detected
769 Winbond. Put it now into bank 0 and Vendor ID High Byte */
770 asb100_write_value(new_client, ASB100_REG_BANK,
771 (asb100_read_value(new_client, ASB100_REG_BANK) & 0x78) | 0x80);
772
773 /* Determine the chip type. */
774 if (kind <= 0) {
775 int val1 = asb100_read_value(new_client, ASB100_REG_WCHIPID);
776 int val2 = asb100_read_value(new_client, ASB100_REG_CHIPMAN);
777
778 if ((val1 == 0x31) && (val2 == 0x06))
779 kind = asb100;
780 else {
781 if (kind == 0)
782 dev_warn(&new_client->dev, "ignoring "
783 "'force' parameter for unknown chip "
784 "at adapter %d, address 0x%02x.\n",
785 i2c_adapter_id(adapter), address);
786 err = -ENODEV;
787 goto ERROR1;
788 }
789 }
790
791 /* Fill in remaining client fields and put it into the global list */
792 strlcpy(new_client->name, "asb100", I2C_NAME_SIZE);
793 data->type = kind;
794
795 data->valid = 0;
796 init_MUTEX(&data->update_lock);
797
798 /* Tell the I2C layer a new client has arrived */
799 if ((err = i2c_attach_client(new_client)))
800 goto ERROR1;
801
802 /* Attach secondary lm75 clients */
803 if ((err = asb100_detect_subclients(adapter, address, kind,
804 new_client)))
805 goto ERROR2;
806
807 /* Initialize the chip */
808 asb100_init_client(new_client);
809
810 /* A few vars need to be filled upon startup */
811 data->fan_min[0] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(0));
812 data->fan_min[1] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(1));
813 data->fan_min[2] = asb100_read_value(new_client, ASB100_REG_FAN_MIN(2));
814
815 /* Register sysfs hooks */
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400816 data->class_dev = hwmon_device_register(&new_client->dev);
817 if (IS_ERR(data->class_dev)) {
818 err = PTR_ERR(data->class_dev);
819 goto ERROR3;
820 }
821
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 device_create_file_in(new_client, 0);
823 device_create_file_in(new_client, 1);
824 device_create_file_in(new_client, 2);
825 device_create_file_in(new_client, 3);
826 device_create_file_in(new_client, 4);
827 device_create_file_in(new_client, 5);
828 device_create_file_in(new_client, 6);
829
830 device_create_file_fan(new_client, 1);
831 device_create_file_fan(new_client, 2);
832 device_create_file_fan(new_client, 3);
833
834 device_create_file_temp(new_client, 1);
835 device_create_file_temp(new_client, 2);
836 device_create_file_temp(new_client, 3);
837 device_create_file_temp(new_client, 4);
838
839 device_create_file_vid(new_client);
840 device_create_file_vrm(new_client);
841
842 device_create_file_alarms(new_client);
843
844 device_create_file_pwm1(new_client);
845
846 return 0;
847
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400848ERROR3:
849 i2c_detach_client(data->lm75[1]);
850 i2c_detach_client(data->lm75[0]);
851 kfree(data->lm75[1]);
852 kfree(data->lm75[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853ERROR2:
854 i2c_detach_client(new_client);
855ERROR1:
856 kfree(data);
857ERROR0:
858 return err;
859}
860
861static int asb100_detach_client(struct i2c_client *client)
862{
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400863 struct asb100_data *data = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 int err;
865
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400866 /* main client */
867 if (data)
868 hwmon_device_unregister(data->class_dev);
869
Jean Delvare7bef5592005-07-27 22:14:49 +0200870 if ((err = i2c_detach_client(client)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400873 /* main client */
874 if (data)
875 kfree(data);
876
877 /* subclient */
878 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 kfree(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880
881 return 0;
882}
883
884/* The SMBus locks itself, usually, but nothing may access the chip between
885 bank switches. */
886static int asb100_read_value(struct i2c_client *client, u16 reg)
887{
888 struct asb100_data *data = i2c_get_clientdata(client);
889 struct i2c_client *cl;
890 int res, bank;
891
892 down(&data->lock);
893
894 bank = (reg >> 8) & 0x0f;
895 if (bank > 2)
896 /* switch banks */
897 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
898
899 if (bank == 0 || bank > 2) {
900 res = i2c_smbus_read_byte_data(client, reg & 0xff);
901 } else {
902 /* switch to subclient */
903 cl = data->lm75[bank - 1];
904
905 /* convert from ISA to LM75 I2C addresses */
906 switch (reg & 0xff) {
907 case 0x50: /* TEMP */
908 res = swab16(i2c_smbus_read_word_data (cl, 0));
909 break;
910 case 0x52: /* CONFIG */
911 res = i2c_smbus_read_byte_data(cl, 1);
912 break;
913 case 0x53: /* HYST */
914 res = swab16(i2c_smbus_read_word_data (cl, 2));
915 break;
916 case 0x55: /* MAX */
917 default:
918 res = swab16(i2c_smbus_read_word_data (cl, 3));
919 break;
920 }
921 }
922
923 if (bank > 2)
924 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
925
926 up(&data->lock);
927
928 return res;
929}
930
931static void asb100_write_value(struct i2c_client *client, u16 reg, u16 value)
932{
933 struct asb100_data *data = i2c_get_clientdata(client);
934 struct i2c_client *cl;
935 int bank;
936
937 down(&data->lock);
938
939 bank = (reg >> 8) & 0x0f;
940 if (bank > 2)
941 /* switch banks */
942 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, bank);
943
944 if (bank == 0 || bank > 2) {
945 i2c_smbus_write_byte_data(client, reg & 0xff, value & 0xff);
946 } else {
947 /* switch to subclient */
948 cl = data->lm75[bank - 1];
949
950 /* convert from ISA to LM75 I2C addresses */
951 switch (reg & 0xff) {
952 case 0x52: /* CONFIG */
953 i2c_smbus_write_byte_data(cl, 1, value & 0xff);
954 break;
955 case 0x53: /* HYST */
956 i2c_smbus_write_word_data(cl, 2, swab16(value));
957 break;
958 case 0x55: /* MAX */
959 i2c_smbus_write_word_data(cl, 3, swab16(value));
960 break;
961 }
962 }
963
964 if (bank > 2)
965 i2c_smbus_write_byte_data(client, ASB100_REG_BANK, 0);
966
967 up(&data->lock);
968}
969
970static void asb100_init_client(struct i2c_client *client)
971{
972 struct asb100_data *data = i2c_get_clientdata(client);
973 int vid = 0;
974
975 vid = asb100_read_value(client, ASB100_REG_VID_FANDIV) & 0x0f;
976 vid |= (asb100_read_value(client, ASB100_REG_CHIPID) & 0x01) << 4;
977 data->vrm = i2c_which_vrm();
978 vid = vid_from_reg(vid, data->vrm);
979
980 /* Start monitoring */
981 asb100_write_value(client, ASB100_REG_CONFIG,
982 (asb100_read_value(client, ASB100_REG_CONFIG) & 0xf7) | 0x01);
983}
984
985static struct asb100_data *asb100_update_device(struct device *dev)
986{
987 struct i2c_client *client = to_i2c_client(dev);
988 struct asb100_data *data = i2c_get_clientdata(client);
989 int i;
990
991 down(&data->update_lock);
992
993 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
994 || !data->valid) {
995
996 dev_dbg(&client->dev, "starting device update...\n");
997
998 /* 7 voltage inputs */
999 for (i = 0; i < 7; i++) {
1000 data->in[i] = asb100_read_value(client,
1001 ASB100_REG_IN(i));
1002 data->in_min[i] = asb100_read_value(client,
1003 ASB100_REG_IN_MIN(i));
1004 data->in_max[i] = asb100_read_value(client,
1005 ASB100_REG_IN_MAX(i));
1006 }
1007
1008 /* 3 fan inputs */
1009 for (i = 0; i < 3; i++) {
1010 data->fan[i] = asb100_read_value(client,
1011 ASB100_REG_FAN(i));
1012 data->fan_min[i] = asb100_read_value(client,
1013 ASB100_REG_FAN_MIN(i));
1014 }
1015
1016 /* 4 temperature inputs */
1017 for (i = 1; i <= 4; i++) {
1018 data->temp[i-1] = asb100_read_value(client,
1019 ASB100_REG_TEMP(i));
1020 data->temp_max[i-1] = asb100_read_value(client,
1021 ASB100_REG_TEMP_MAX(i));
1022 data->temp_hyst[i-1] = asb100_read_value(client,
1023 ASB100_REG_TEMP_HYST(i));
1024 }
1025
1026 /* VID and fan divisors */
1027 i = asb100_read_value(client, ASB100_REG_VID_FANDIV);
1028 data->vid = i & 0x0f;
1029 data->vid |= (asb100_read_value(client,
1030 ASB100_REG_CHIPID) & 0x01) << 4;
1031 data->fan_div[0] = (i >> 4) & 0x03;
1032 data->fan_div[1] = (i >> 6) & 0x03;
1033 data->fan_div[2] = (asb100_read_value(client,
1034 ASB100_REG_PIN) >> 6) & 0x03;
1035
1036 /* PWM */
1037 data->pwm = asb100_read_value(client, ASB100_REG_PWM1);
1038
1039 /* alarms */
1040 data->alarms = asb100_read_value(client, ASB100_REG_ALARM1) +
1041 (asb100_read_value(client, ASB100_REG_ALARM2) << 8);
1042
1043 data->last_updated = jiffies;
1044 data->valid = 1;
1045
1046 dev_dbg(&client->dev, "... device update complete\n");
1047 }
1048
1049 up(&data->update_lock);
1050
1051 return data;
1052}
1053
1054static int __init asb100_init(void)
1055{
1056 return i2c_add_driver(&asb100_driver);
1057}
1058
1059static void __exit asb100_exit(void)
1060{
1061 i2c_del_driver(&asb100_driver);
1062}
1063
1064MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
1065MODULE_DESCRIPTION("ASB100 Bach driver");
1066MODULE_LICENSE("GPL");
1067
1068module_init(asb100_init);
1069module_exit(asb100_exit);
1070