blob: 00f48484e54b6fdd1b120384b485de36d9de07a4 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 fscpos.c - Kernel module for hardware monitoring with FSC Poseidon chips
3 Copyright (C) 2004, 2005 Stefan Ott <stefan@desire.ch>
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18*/
19
20/*
21 fujitsu siemens poseidon chip,
22 module based on the old fscpos module by Hermann Jung <hej@odn.de> and
23 the fscher module by Reinhard Nissl <rnissl@gmx.de>
24
25 original module based on lm80.c
26 Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
27 and Philip Edelbrock <phil@netroedge.com>
28
29 Thanks to Jean Delvare for reviewing my code and suggesting a lot of
30 improvements.
31*/
32
33#include <linux/module.h>
34#include <linux/slab.h>
Jean Delvare0cacdf22005-07-29 12:15:12 -070035#include <linux/jiffies.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <linux/i2c.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <linux/init.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040038#include <linux/hwmon.h>
39#include <linux/err.h>
Ingo Molnar9a61bf62006-01-18 23:19:26 +010040#include <linux/mutex.h>
Jean Delvare87808be2006-09-24 21:17:13 +020041#include <linux/sysfs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
43/*
44 * Addresses to scan
45 */
Mark M. Hoffman25e9c862008-02-17 22:28:03 -050046static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48/*
49 * Insmod parameters
50 */
Jean Delvaref4b50262005-07-31 21:49:03 +020051I2C_CLIENT_INSMOD_1(fscpos);
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53/*
54 * The FSCPOS registers
55 */
56
57/* chip identification */
58#define FSCPOS_REG_IDENT_0 0x00
59#define FSCPOS_REG_IDENT_1 0x01
60#define FSCPOS_REG_IDENT_2 0x02
61#define FSCPOS_REG_REVISION 0x03
62
63/* global control and status */
64#define FSCPOS_REG_EVENT_STATE 0x04
65#define FSCPOS_REG_CONTROL 0x05
66
67/* watchdog */
68#define FSCPOS_REG_WDOG_PRESET 0x28
69#define FSCPOS_REG_WDOG_STATE 0x23
70#define FSCPOS_REG_WDOG_CONTROL 0x21
71
72/* voltages */
73#define FSCPOS_REG_VOLT_12 0x45
74#define FSCPOS_REG_VOLT_5 0x42
75#define FSCPOS_REG_VOLT_BATT 0x48
76
77/* fans - the chip does not support minimum speed for fan2 */
78static u8 FSCPOS_REG_PWM[] = { 0x55, 0x65 };
79static u8 FSCPOS_REG_FAN_ACT[] = { 0x0e, 0x6b, 0xab };
80static u8 FSCPOS_REG_FAN_STATE[] = { 0x0d, 0x62, 0xa2 };
81static u8 FSCPOS_REG_FAN_RIPPLE[] = { 0x0f, 0x6f, 0xaf };
82
83/* temperatures */
84static u8 FSCPOS_REG_TEMP_ACT[] = { 0x64, 0x32, 0x35 };
85static u8 FSCPOS_REG_TEMP_STATE[] = { 0x71, 0x81, 0x91 };
86
87/*
88 * Functions declaration
89 */
90static int fscpos_attach_adapter(struct i2c_adapter *adapter);
91static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind);
92static int fscpos_detach_client(struct i2c_client *client);
93
Darren Jenkinsf6c27fc2006-02-27 23:14:58 +010094static int fscpos_read_value(struct i2c_client *client, u8 reg);
95static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096static struct fscpos_data *fscpos_update_device(struct device *dev);
97static void fscpos_init_client(struct i2c_client *client);
98
99static void reset_fan_alarm(struct i2c_client *client, int nr);
100
101/*
102 * Driver data (common to all clients)
103 */
104static struct i2c_driver fscpos_driver = {
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100105 .driver = {
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100106 .name = "fscpos",
107 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 .attach_adapter = fscpos_attach_adapter,
109 .detach_client = fscpos_detach_client,
110};
111
112/*
113 * Client data (each client gets its own)
114 */
115struct fscpos_data {
116 struct i2c_client client;
Tony Jones1beeffe2007-08-20 13:46:20 -0700117 struct device *hwmon_dev;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100118 struct mutex update_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 char valid; /* 0 until following fields are valid */
120 unsigned long last_updated; /* In jiffies */
121
122 /* register values */
123 u8 revision; /* revision of chip */
124 u8 global_event; /* global event status */
125 u8 global_control; /* global control register */
126 u8 wdog_control; /* watchdog control */
127 u8 wdog_state; /* watchdog status */
128 u8 wdog_preset; /* watchdog preset */
129 u8 volt[3]; /* 12, 5, battery current */
130 u8 temp_act[3]; /* temperature */
131 u8 temp_status[3]; /* status of sensor */
132 u8 fan_act[3]; /* fans revolutions per second */
133 u8 fan_status[3]; /* fan status */
134 u8 pwm[2]; /* fan min value for rps */
135 u8 fan_ripple[3]; /* divider for rps */
136};
137
138/* Temperature */
139#define TEMP_FROM_REG(val) (((val) - 128) * 1000)
140
141static ssize_t show_temp_input(struct fscpos_data *data, char *buf, int nr)
142{
143 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[nr - 1]));
144}
145
146static ssize_t show_temp_status(struct fscpos_data *data, char *buf, int nr)
147{
148 /* bits 2..7 reserved => mask with 0x03 */
149 return sprintf(buf, "%u\n", data->temp_status[nr - 1] & 0x03);
150}
151
152static ssize_t show_temp_reset(struct fscpos_data *data, char *buf, int nr)
153{
154 return sprintf(buf, "1\n");
155}
156
157static ssize_t set_temp_reset(struct i2c_client *client, struct fscpos_data
158 *data, const char *buf, size_t count, int nr, int reg)
159{
160 unsigned long v = simple_strtoul(buf, NULL, 10);
161 if (v != 1) {
162 dev_err(&client->dev, "temp_reset value %ld not supported. "
163 "Use 1 to reset the alarm!\n", v);
164 return -EINVAL;
165 }
166
167 dev_info(&client->dev, "You used the temp_reset feature which has not "
168 "been proplerly tested. Please report your "
169 "experience to the module author.\n");
170
171 /* Supported value: 2 (clears the status) */
Jean Delvare3fd1bb92005-08-25 18:43:37 +0200172 fscpos_write_value(client, FSCPOS_REG_TEMP_STATE[nr - 1], 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 return count;
174}
175
176/* Fans */
177#define RPM_FROM_REG(val) ((val) * 60)
178
179static ssize_t show_fan_status(struct fscpos_data *data, char *buf, int nr)
180{
181 /* bits 0..1, 3..7 reserved => mask with 0x04 */
182 return sprintf(buf, "%u\n", data->fan_status[nr - 1] & 0x04);
183}
184
185static ssize_t show_fan_input(struct fscpos_data *data, char *buf, int nr)
186{
187 return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[nr - 1]));
188}
189
190static ssize_t show_fan_ripple(struct fscpos_data *data, char *buf, int nr)
191{
192 /* bits 2..7 reserved => mask with 0x03 */
193 return sprintf(buf, "%u\n", data->fan_ripple[nr - 1] & 0x03);
194}
195
196static ssize_t set_fan_ripple(struct i2c_client *client, struct fscpos_data
197 *data, const char *buf, size_t count, int nr, int reg)
198{
199 /* supported values: 2, 4, 8 */
200 unsigned long v = simple_strtoul(buf, NULL, 10);
201
202 switch (v) {
203 case 2: v = 1; break;
204 case 4: v = 2; break;
205 case 8: v = 3; break;
206 default:
207 dev_err(&client->dev, "fan_ripple value %ld not supported. "
208 "Must be one of 2, 4 or 8!\n", v);
209 return -EINVAL;
210 }
211
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100212 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 /* bits 2..7 reserved => mask with 0x03 */
214 data->fan_ripple[nr - 1] &= ~0x03;
215 data->fan_ripple[nr - 1] |= v;
216
217 fscpos_write_value(client, reg, data->fan_ripple[nr - 1]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100218 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 return count;
220}
221
222static ssize_t show_pwm(struct fscpos_data *data, char *buf, int nr)
223{
224 return sprintf(buf, "%u\n", data->pwm[nr - 1]);
225}
226
227static ssize_t set_pwm(struct i2c_client *client, struct fscpos_data *data,
228 const char *buf, size_t count, int nr, int reg)
229{
230 unsigned long v = simple_strtoul(buf, NULL, 10);
231
232 /* Range: 0..255 */
233 if (v < 0) v = 0;
234 if (v > 255) v = 255;
235
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100236 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 data->pwm[nr - 1] = v;
238 fscpos_write_value(client, reg, data->pwm[nr - 1]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100239 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 return count;
241}
242
243static void reset_fan_alarm(struct i2c_client *client, int nr)
244{
245 fscpos_write_value(client, FSCPOS_REG_FAN_STATE[nr], 4);
246}
247
248/* Volts */
249#define VOLT_FROM_REG(val, mult) ((val) * (mult) / 255)
250
Yani Ioannou30f74292005-05-17 06:41:35 -0400251static ssize_t show_volt_12(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252{
253 struct fscpos_data *data = fscpos_update_device(dev);
254 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[0], 14200));
255}
256
Yani Ioannou30f74292005-05-17 06:41:35 -0400257static ssize_t show_volt_5(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258{
259 struct fscpos_data *data = fscpos_update_device(dev);
260 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[1], 6600));
261}
262
Yani Ioannou30f74292005-05-17 06:41:35 -0400263static ssize_t show_volt_batt(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264{
265 struct fscpos_data *data = fscpos_update_device(dev);
266 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[2], 3300));
267}
268
269/* Watchdog */
270static ssize_t show_wdog_control(struct fscpos_data *data, char *buf)
271{
272 /* bits 0..3 reserved, bit 6 write only => mask with 0xb0 */
273 return sprintf(buf, "%u\n", data->wdog_control & 0xb0);
274}
275
276static ssize_t set_wdog_control(struct i2c_client *client, struct fscpos_data
277 *data, const char *buf, size_t count, int reg)
278{
279 /* bits 0..3 reserved => mask with 0xf0 */
280 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
281
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100282 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 data->wdog_control &= ~0xf0;
284 data->wdog_control |= v;
285 fscpos_write_value(client, reg, data->wdog_control);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100286 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 return count;
288}
289
290static ssize_t show_wdog_state(struct fscpos_data *data, char *buf)
291{
292 /* bits 0, 2..7 reserved => mask with 0x02 */
293 return sprintf(buf, "%u\n", data->wdog_state & 0x02);
294}
295
296static ssize_t set_wdog_state(struct i2c_client *client, struct fscpos_data
297 *data, const char *buf, size_t count, int reg)
298{
299 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
300
301 /* Valid values: 2 (clear) */
302 if (v != 2) {
303 dev_err(&client->dev, "wdog_state value %ld not supported. "
304 "Must be 2 to clear the state!\n", v);
305 return -EINVAL;
306 }
307
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100308 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 data->wdog_state &= ~v;
310 fscpos_write_value(client, reg, v);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100311 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 return count;
313}
314
315static ssize_t show_wdog_preset(struct fscpos_data *data, char *buf)
316{
317 return sprintf(buf, "%u\n", data->wdog_preset);
318}
319
320static ssize_t set_wdog_preset(struct i2c_client *client, struct fscpos_data
321 *data, const char *buf, size_t count, int reg)
322{
323 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
324
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100325 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 data->wdog_preset = v;
327 fscpos_write_value(client, reg, data->wdog_preset);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100328 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 return count;
330}
331
332/* Event */
Yani Ioannou30f74292005-05-17 06:41:35 -0400333static ssize_t show_event(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334{
335 /* bits 5..7 reserved => mask with 0x1f */
336 struct fscpos_data *data = fscpos_update_device(dev);
337 return sprintf(buf, "%u\n", data->global_event & 0x9b);
338}
339
340/*
341 * Sysfs stuff
342 */
343#define create_getter(kind, sub) \
Yani Ioannou30f74292005-05-17 06:41:35 -0400344 static ssize_t sysfs_show_##kind##sub(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 { \
346 struct fscpos_data *data = fscpos_update_device(dev); \
347 return show_##kind##sub(data, buf); \
348 }
349
350#define create_getter_n(kind, offset, sub) \
Yani Ioannou30f74292005-05-17 06:41:35 -0400351 static ssize_t sysfs_show_##kind##offset##sub(struct device *dev, struct device_attribute *attr, char\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 *buf) \
353 { \
354 struct fscpos_data *data = fscpos_update_device(dev); \
355 return show_##kind##sub(data, buf, offset); \
356 }
357
358#define create_setter(kind, sub, reg) \
Yani Ioannou30f74292005-05-17 06:41:35 -0400359 static ssize_t sysfs_set_##kind##sub (struct device *dev, struct device_attribute *attr, const char \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 *buf, size_t count) \
361 { \
362 struct i2c_client *client = to_i2c_client(dev); \
363 struct fscpos_data *data = i2c_get_clientdata(client); \
364 return set_##kind##sub(client, data, buf, count, reg); \
365 }
366
367#define create_setter_n(kind, offset, sub, reg) \
Yani Ioannou30f74292005-05-17 06:41:35 -0400368 static ssize_t sysfs_set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 const char *buf, size_t count) \
370 { \
371 struct i2c_client *client = to_i2c_client(dev); \
372 struct fscpos_data *data = i2c_get_clientdata(client); \
373 return set_##kind##sub(client, data, buf, count, offset, reg);\
374 }
375
376#define create_sysfs_device_ro(kind, sub, offset) \
377 static DEVICE_ATTR(kind##offset##sub, S_IRUGO, \
378 sysfs_show_##kind##offset##sub, NULL);
379
380#define create_sysfs_device_rw(kind, sub, offset) \
381 static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, \
382 sysfs_show_##kind##offset##sub, sysfs_set_##kind##offset##sub);
383
384#define sysfs_ro_n(kind, sub, offset) \
385 create_getter_n(kind, offset, sub); \
386 create_sysfs_device_ro(kind, sub, offset);
387
388#define sysfs_rw_n(kind, sub, offset, reg) \
389 create_getter_n(kind, offset, sub); \
390 create_setter_n(kind, offset, sub, reg); \
391 create_sysfs_device_rw(kind, sub, offset);
392
393#define sysfs_rw(kind, sub, reg) \
394 create_getter(kind, sub); \
395 create_setter(kind, sub, reg); \
396 create_sysfs_device_rw(kind, sub,);
397
398#define sysfs_fan_with_min(offset, reg_status, reg_ripple, reg_min) \
399 sysfs_fan(offset, reg_status, reg_ripple); \
400 sysfs_rw_n(pwm,, offset, reg_min);
401
402#define sysfs_fan(offset, reg_status, reg_ripple) \
403 sysfs_ro_n(fan, _input, offset); \
404 sysfs_ro_n(fan, _status, offset); \
405 sysfs_rw_n(fan, _ripple, offset, reg_ripple);
406
407#define sysfs_temp(offset, reg_status) \
408 sysfs_ro_n(temp, _input, offset); \
409 sysfs_ro_n(temp, _status, offset); \
410 sysfs_rw_n(temp, _reset, offset, reg_status);
411
412#define sysfs_watchdog(reg_wdog_preset, reg_wdog_state, reg_wdog_control) \
413 sysfs_rw(wdog, _control, reg_wdog_control); \
414 sysfs_rw(wdog, _preset, reg_wdog_preset); \
415 sysfs_rw(wdog, _state, reg_wdog_state);
416
417sysfs_fan_with_min(1, FSCPOS_REG_FAN_STATE[0], FSCPOS_REG_FAN_RIPPLE[0],
418 FSCPOS_REG_PWM[0]);
419sysfs_fan_with_min(2, FSCPOS_REG_FAN_STATE[1], FSCPOS_REG_FAN_RIPPLE[1],
420 FSCPOS_REG_PWM[1]);
421sysfs_fan(3, FSCPOS_REG_FAN_STATE[2], FSCPOS_REG_FAN_RIPPLE[2]);
422
423sysfs_temp(1, FSCPOS_REG_TEMP_STATE[0]);
424sysfs_temp(2, FSCPOS_REG_TEMP_STATE[1]);
425sysfs_temp(3, FSCPOS_REG_TEMP_STATE[2]);
426
427sysfs_watchdog(FSCPOS_REG_WDOG_PRESET, FSCPOS_REG_WDOG_STATE,
428 FSCPOS_REG_WDOG_CONTROL);
429
430static DEVICE_ATTR(event, S_IRUGO, show_event, NULL);
431static DEVICE_ATTR(in0_input, S_IRUGO, show_volt_12, NULL);
432static DEVICE_ATTR(in1_input, S_IRUGO, show_volt_5, NULL);
433static DEVICE_ATTR(in2_input, S_IRUGO, show_volt_batt, NULL);
434
Jean Delvare87808be2006-09-24 21:17:13 +0200435static struct attribute *fscpos_attributes[] = {
436 &dev_attr_event.attr,
437 &dev_attr_in0_input.attr,
438 &dev_attr_in1_input.attr,
439 &dev_attr_in2_input.attr,
440
441 &dev_attr_wdog_control.attr,
442 &dev_attr_wdog_preset.attr,
443 &dev_attr_wdog_state.attr,
444
445 &dev_attr_temp1_input.attr,
446 &dev_attr_temp1_status.attr,
447 &dev_attr_temp1_reset.attr,
448 &dev_attr_temp2_input.attr,
449 &dev_attr_temp2_status.attr,
450 &dev_attr_temp2_reset.attr,
451 &dev_attr_temp3_input.attr,
452 &dev_attr_temp3_status.attr,
453 &dev_attr_temp3_reset.attr,
454
455 &dev_attr_fan1_input.attr,
456 &dev_attr_fan1_status.attr,
457 &dev_attr_fan1_ripple.attr,
458 &dev_attr_pwm1.attr,
459 &dev_attr_fan2_input.attr,
460 &dev_attr_fan2_status.attr,
461 &dev_attr_fan2_ripple.attr,
462 &dev_attr_pwm2.attr,
463 &dev_attr_fan3_input.attr,
464 &dev_attr_fan3_status.attr,
465 &dev_attr_fan3_ripple.attr,
466 NULL
467};
468
469static const struct attribute_group fscpos_group = {
470 .attrs = fscpos_attributes,
471};
472
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473static int fscpos_attach_adapter(struct i2c_adapter *adapter)
474{
475 if (!(adapter->class & I2C_CLASS_HWMON))
476 return 0;
Jean Delvare2ed2dc32005-07-31 21:42:02 +0200477 return i2c_probe(adapter, &addr_data, fscpos_detect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478}
479
Ben Dooksc49efce2005-10-26 21:07:25 +0200480static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481{
482 struct i2c_client *new_client;
483 struct fscpos_data *data;
484 int err = 0;
485
486 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
487 goto exit;
488
489 /*
490 * OK. For now, we presume we have a valid client. We now create the
491 * client structure, even though we cannot fill it completely yet.
492 * But it allows us to access fscpos_{read,write}_value.
493 */
494
Deepak Saxenaba9c2e82005-10-17 23:08:32 +0200495 if (!(data = kzalloc(sizeof(struct fscpos_data), GFP_KERNEL))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 err = -ENOMEM;
497 goto exit;
498 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499
500 new_client = &data->client;
501 i2c_set_clientdata(new_client, data);
502 new_client->addr = address;
503 new_client->adapter = adapter;
504 new_client->driver = &fscpos_driver;
505 new_client->flags = 0;
506
507 /* Do the remaining detection unless force or force_fscpos parameter */
508 if (kind < 0) {
509 if ((fscpos_read_value(new_client, FSCPOS_REG_IDENT_0)
510 != 0x50) /* 'P' */
511 || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_1)
512 != 0x45) /* 'E' */
513 || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_2)
514 != 0x47))/* 'G' */
515 {
516 dev_dbg(&new_client->dev, "fscpos detection failed\n");
517 goto exit_free;
518 }
519 }
520
521 /* Fill in the remaining client fields and put it in the global list */
522 strlcpy(new_client->name, "fscpos", I2C_NAME_SIZE);
523
524 data->valid = 0;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100525 mutex_init(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526
527 /* Tell the I2C layer a new client has arrived */
528 if ((err = i2c_attach_client(new_client)))
529 goto exit_free;
530
531 /* Inizialize the fscpos chip */
532 fscpos_init_client(new_client);
533
534 /* Announce that the chip was found */
535 dev_info(&new_client->dev, "Found fscpos chip, rev %u\n", data->revision);
536
537 /* Register sysfs hooks */
Jean Delvare87808be2006-09-24 21:17:13 +0200538 if ((err = sysfs_create_group(&new_client->dev.kobj, &fscpos_group)))
539 goto exit_detach;
540
Tony Jones1beeffe2007-08-20 13:46:20 -0700541 data->hwmon_dev = hwmon_device_register(&new_client->dev);
542 if (IS_ERR(data->hwmon_dev)) {
543 err = PTR_ERR(data->hwmon_dev);
Jean Delvare87808be2006-09-24 21:17:13 +0200544 goto exit_remove_files;
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400545 }
546
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 return 0;
548
Jean Delvare87808be2006-09-24 21:17:13 +0200549exit_remove_files:
550 sysfs_remove_group(&new_client->dev.kobj, &fscpos_group);
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400551exit_detach:
552 i2c_detach_client(new_client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553exit_free:
554 kfree(data);
555exit:
556 return err;
557}
558
559static int fscpos_detach_client(struct i2c_client *client)
560{
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400561 struct fscpos_data *data = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 int err;
563
Tony Jones1beeffe2007-08-20 13:46:20 -0700564 hwmon_device_unregister(data->hwmon_dev);
Jean Delvare87808be2006-09-24 21:17:13 +0200565 sysfs_remove_group(&client->dev.kobj, &fscpos_group);
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400566
Jean Delvare7bef5592005-07-27 22:14:49 +0200567 if ((err = i2c_detach_client(client)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 return err;
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400569 kfree(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 return 0;
571}
572
573static int fscpos_read_value(struct i2c_client *client, u8 reg)
574{
575 dev_dbg(&client->dev, "Read reg 0x%02x\n", reg);
576 return i2c_smbus_read_byte_data(client, reg);
577}
578
579static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value)
580{
581 dev_dbg(&client->dev, "Write reg 0x%02x, val 0x%02x\n", reg, value);
582 return i2c_smbus_write_byte_data(client, reg, value);
583}
584
585/* Called when we have found a new FSCPOS chip */
586static void fscpos_init_client(struct i2c_client *client)
587{
588 struct fscpos_data *data = i2c_get_clientdata(client);
589
590 /* read revision from chip */
591 data->revision = fscpos_read_value(client, FSCPOS_REG_REVISION);
592}
593
594static struct fscpos_data *fscpos_update_device(struct device *dev)
595{
596 struct i2c_client *client = to_i2c_client(dev);
597 struct fscpos_data *data = i2c_get_clientdata(client);
598
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100599 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600
Jean Delvare0cacdf22005-07-29 12:15:12 -0700601 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 int i;
603
604 dev_dbg(&client->dev, "Starting fscpos update\n");
605
606 for (i = 0; i < 3; i++) {
607 data->temp_act[i] = fscpos_read_value(client,
608 FSCPOS_REG_TEMP_ACT[i]);
609 data->temp_status[i] = fscpos_read_value(client,
610 FSCPOS_REG_TEMP_STATE[i]);
611 data->fan_act[i] = fscpos_read_value(client,
612 FSCPOS_REG_FAN_ACT[i]);
613 data->fan_status[i] = fscpos_read_value(client,
614 FSCPOS_REG_FAN_STATE[i]);
615 data->fan_ripple[i] = fscpos_read_value(client,
616 FSCPOS_REG_FAN_RIPPLE[i]);
617 if (i < 2) {
618 /* fan2_min is not supported by the chip */
619 data->pwm[i] = fscpos_read_value(client,
620 FSCPOS_REG_PWM[i]);
621 }
622 /* reset fan status if speed is back to > 0 */
623 if (data->fan_status[i] != 0 && data->fan_act[i] > 0) {
624 reset_fan_alarm(client, i);
625 }
626 }
627
628 data->volt[0] = fscpos_read_value(client, FSCPOS_REG_VOLT_12);
629 data->volt[1] = fscpos_read_value(client, FSCPOS_REG_VOLT_5);
630 data->volt[2] = fscpos_read_value(client, FSCPOS_REG_VOLT_BATT);
631
632 data->wdog_preset = fscpos_read_value(client,
633 FSCPOS_REG_WDOG_PRESET);
634 data->wdog_state = fscpos_read_value(client,
635 FSCPOS_REG_WDOG_STATE);
636 data->wdog_control = fscpos_read_value(client,
637 FSCPOS_REG_WDOG_CONTROL);
638
639 data->global_event = fscpos_read_value(client,
640 FSCPOS_REG_EVENT_STATE);
641
642 data->last_updated = jiffies;
643 data->valid = 1;
644 }
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100645 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646 return data;
647}
648
649static int __init sm_fscpos_init(void)
650{
651 return i2c_add_driver(&fscpos_driver);
652}
653
654static void __exit sm_fscpos_exit(void)
655{
656 i2c_del_driver(&fscpos_driver);
657}
658
659MODULE_AUTHOR("Stefan Ott <stefan@desire.ch> based on work from Hermann Jung "
660 "<hej@odn.de>, Frodo Looijaard <frodol@dds.nl>"
661 " and Philip Edelbrock <phil@netroedge.com>");
662MODULE_DESCRIPTION("fujitsu siemens poseidon chip driver");
663MODULE_LICENSE("GPL");
664
665module_init(sm_fscpos_init);
666module_exit(sm_fscpos_exit);