blob: ea506a77f9c9d25f701b5cc222c471439f56ca6a [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 */
46static 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 .id = I2C_DRIVERID_FSCPOS,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 .attach_adapter = fscpos_attach_adapter,
110 .detach_client = fscpos_detach_client,
111};
112
113/*
114 * Client data (each client gets its own)
115 */
116struct fscpos_data {
117 struct i2c_client client;
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400118 struct class_device *class_dev;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100119 struct mutex update_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 char valid; /* 0 until following fields are valid */
121 unsigned long last_updated; /* In jiffies */
122
123 /* register values */
124 u8 revision; /* revision of chip */
125 u8 global_event; /* global event status */
126 u8 global_control; /* global control register */
127 u8 wdog_control; /* watchdog control */
128 u8 wdog_state; /* watchdog status */
129 u8 wdog_preset; /* watchdog preset */
130 u8 volt[3]; /* 12, 5, battery current */
131 u8 temp_act[3]; /* temperature */
132 u8 temp_status[3]; /* status of sensor */
133 u8 fan_act[3]; /* fans revolutions per second */
134 u8 fan_status[3]; /* fan status */
135 u8 pwm[2]; /* fan min value for rps */
136 u8 fan_ripple[3]; /* divider for rps */
137};
138
139/* Temperature */
140#define TEMP_FROM_REG(val) (((val) - 128) * 1000)
141
142static ssize_t show_temp_input(struct fscpos_data *data, char *buf, int nr)
143{
144 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[nr - 1]));
145}
146
147static ssize_t show_temp_status(struct fscpos_data *data, char *buf, int nr)
148{
149 /* bits 2..7 reserved => mask with 0x03 */
150 return sprintf(buf, "%u\n", data->temp_status[nr - 1] & 0x03);
151}
152
153static ssize_t show_temp_reset(struct fscpos_data *data, char *buf, int nr)
154{
155 return sprintf(buf, "1\n");
156}
157
158static ssize_t set_temp_reset(struct i2c_client *client, struct fscpos_data
159 *data, const char *buf, size_t count, int nr, int reg)
160{
161 unsigned long v = simple_strtoul(buf, NULL, 10);
162 if (v != 1) {
163 dev_err(&client->dev, "temp_reset value %ld not supported. "
164 "Use 1 to reset the alarm!\n", v);
165 return -EINVAL;
166 }
167
168 dev_info(&client->dev, "You used the temp_reset feature which has not "
169 "been proplerly tested. Please report your "
170 "experience to the module author.\n");
171
172 /* Supported value: 2 (clears the status) */
Jean Delvare3fd1bb92005-08-25 18:43:37 +0200173 fscpos_write_value(client, FSCPOS_REG_TEMP_STATE[nr - 1], 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 return count;
175}
176
177/* Fans */
178#define RPM_FROM_REG(val) ((val) * 60)
179
180static ssize_t show_fan_status(struct fscpos_data *data, char *buf, int nr)
181{
182 /* bits 0..1, 3..7 reserved => mask with 0x04 */
183 return sprintf(buf, "%u\n", data->fan_status[nr - 1] & 0x04);
184}
185
186static ssize_t show_fan_input(struct fscpos_data *data, char *buf, int nr)
187{
188 return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[nr - 1]));
189}
190
191static ssize_t show_fan_ripple(struct fscpos_data *data, char *buf, int nr)
192{
193 /* bits 2..7 reserved => mask with 0x03 */
194 return sprintf(buf, "%u\n", data->fan_ripple[nr - 1] & 0x03);
195}
196
197static ssize_t set_fan_ripple(struct i2c_client *client, struct fscpos_data
198 *data, const char *buf, size_t count, int nr, int reg)
199{
200 /* supported values: 2, 4, 8 */
201 unsigned long v = simple_strtoul(buf, NULL, 10);
202
203 switch (v) {
204 case 2: v = 1; break;
205 case 4: v = 2; break;
206 case 8: v = 3; break;
207 default:
208 dev_err(&client->dev, "fan_ripple value %ld not supported. "
209 "Must be one of 2, 4 or 8!\n", v);
210 return -EINVAL;
211 }
212
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100213 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 /* bits 2..7 reserved => mask with 0x03 */
215 data->fan_ripple[nr - 1] &= ~0x03;
216 data->fan_ripple[nr - 1] |= v;
217
218 fscpos_write_value(client, reg, data->fan_ripple[nr - 1]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100219 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 return count;
221}
222
223static ssize_t show_pwm(struct fscpos_data *data, char *buf, int nr)
224{
225 return sprintf(buf, "%u\n", data->pwm[nr - 1]);
226}
227
228static ssize_t set_pwm(struct i2c_client *client, struct fscpos_data *data,
229 const char *buf, size_t count, int nr, int reg)
230{
231 unsigned long v = simple_strtoul(buf, NULL, 10);
232
233 /* Range: 0..255 */
234 if (v < 0) v = 0;
235 if (v > 255) v = 255;
236
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100237 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 data->pwm[nr - 1] = v;
239 fscpos_write_value(client, reg, data->pwm[nr - 1]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100240 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 return count;
242}
243
244static void reset_fan_alarm(struct i2c_client *client, int nr)
245{
246 fscpos_write_value(client, FSCPOS_REG_FAN_STATE[nr], 4);
247}
248
249/* Volts */
250#define VOLT_FROM_REG(val, mult) ((val) * (mult) / 255)
251
Yani Ioannou30f74292005-05-17 06:41:35 -0400252static ssize_t show_volt_12(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253{
254 struct fscpos_data *data = fscpos_update_device(dev);
255 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[0], 14200));
256}
257
Yani Ioannou30f74292005-05-17 06:41:35 -0400258static ssize_t show_volt_5(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259{
260 struct fscpos_data *data = fscpos_update_device(dev);
261 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[1], 6600));
262}
263
Yani Ioannou30f74292005-05-17 06:41:35 -0400264static ssize_t show_volt_batt(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265{
266 struct fscpos_data *data = fscpos_update_device(dev);
267 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[2], 3300));
268}
269
270/* Watchdog */
271static ssize_t show_wdog_control(struct fscpos_data *data, char *buf)
272{
273 /* bits 0..3 reserved, bit 6 write only => mask with 0xb0 */
274 return sprintf(buf, "%u\n", data->wdog_control & 0xb0);
275}
276
277static ssize_t set_wdog_control(struct i2c_client *client, struct fscpos_data
278 *data, const char *buf, size_t count, int reg)
279{
280 /* bits 0..3 reserved => mask with 0xf0 */
281 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
282
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100283 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 data->wdog_control &= ~0xf0;
285 data->wdog_control |= v;
286 fscpos_write_value(client, reg, data->wdog_control);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100287 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 return count;
289}
290
291static ssize_t show_wdog_state(struct fscpos_data *data, char *buf)
292{
293 /* bits 0, 2..7 reserved => mask with 0x02 */
294 return sprintf(buf, "%u\n", data->wdog_state & 0x02);
295}
296
297static ssize_t set_wdog_state(struct i2c_client *client, struct fscpos_data
298 *data, const char *buf, size_t count, int reg)
299{
300 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
301
302 /* Valid values: 2 (clear) */
303 if (v != 2) {
304 dev_err(&client->dev, "wdog_state value %ld not supported. "
305 "Must be 2 to clear the state!\n", v);
306 return -EINVAL;
307 }
308
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100309 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 data->wdog_state &= ~v;
311 fscpos_write_value(client, reg, v);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100312 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 return count;
314}
315
316static ssize_t show_wdog_preset(struct fscpos_data *data, char *buf)
317{
318 return sprintf(buf, "%u\n", data->wdog_preset);
319}
320
321static ssize_t set_wdog_preset(struct i2c_client *client, struct fscpos_data
322 *data, const char *buf, size_t count, int reg)
323{
324 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
325
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100326 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 data->wdog_preset = v;
328 fscpos_write_value(client, reg, data->wdog_preset);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100329 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 return count;
331}
332
333/* Event */
Yani Ioannou30f74292005-05-17 06:41:35 -0400334static ssize_t show_event(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335{
336 /* bits 5..7 reserved => mask with 0x1f */
337 struct fscpos_data *data = fscpos_update_device(dev);
338 return sprintf(buf, "%u\n", data->global_event & 0x9b);
339}
340
341/*
342 * Sysfs stuff
343 */
344#define create_getter(kind, sub) \
Yani Ioannou30f74292005-05-17 06:41:35 -0400345 static ssize_t sysfs_show_##kind##sub(struct device *dev, struct device_attribute *attr, char *buf) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 { \
347 struct fscpos_data *data = fscpos_update_device(dev); \
348 return show_##kind##sub(data, buf); \
349 }
350
351#define create_getter_n(kind, offset, sub) \
Yani Ioannou30f74292005-05-17 06:41:35 -0400352 static ssize_t sysfs_show_##kind##offset##sub(struct device *dev, struct device_attribute *attr, char\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 *buf) \
354 { \
355 struct fscpos_data *data = fscpos_update_device(dev); \
356 return show_##kind##sub(data, buf, offset); \
357 }
358
359#define create_setter(kind, sub, reg) \
Yani Ioannou30f74292005-05-17 06:41:35 -0400360 static ssize_t sysfs_set_##kind##sub (struct device *dev, struct device_attribute *attr, const char \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 *buf, size_t count) \
362 { \
363 struct i2c_client *client = to_i2c_client(dev); \
364 struct fscpos_data *data = i2c_get_clientdata(client); \
365 return set_##kind##sub(client, data, buf, count, reg); \
366 }
367
368#define create_setter_n(kind, offset, sub, reg) \
Yani Ioannou30f74292005-05-17 06:41:35 -0400369 static ssize_t sysfs_set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 const char *buf, size_t count) \
371 { \
372 struct i2c_client *client = to_i2c_client(dev); \
373 struct fscpos_data *data = i2c_get_clientdata(client); \
374 return set_##kind##sub(client, data, buf, count, offset, reg);\
375 }
376
377#define create_sysfs_device_ro(kind, sub, offset) \
378 static DEVICE_ATTR(kind##offset##sub, S_IRUGO, \
379 sysfs_show_##kind##offset##sub, NULL);
380
381#define create_sysfs_device_rw(kind, sub, offset) \
382 static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, \
383 sysfs_show_##kind##offset##sub, sysfs_set_##kind##offset##sub);
384
385#define sysfs_ro_n(kind, sub, offset) \
386 create_getter_n(kind, offset, sub); \
387 create_sysfs_device_ro(kind, sub, offset);
388
389#define sysfs_rw_n(kind, sub, offset, reg) \
390 create_getter_n(kind, offset, sub); \
391 create_setter_n(kind, offset, sub, reg); \
392 create_sysfs_device_rw(kind, sub, offset);
393
394#define sysfs_rw(kind, sub, reg) \
395 create_getter(kind, sub); \
396 create_setter(kind, sub, reg); \
397 create_sysfs_device_rw(kind, sub,);
398
399#define sysfs_fan_with_min(offset, reg_status, reg_ripple, reg_min) \
400 sysfs_fan(offset, reg_status, reg_ripple); \
401 sysfs_rw_n(pwm,, offset, reg_min);
402
403#define sysfs_fan(offset, reg_status, reg_ripple) \
404 sysfs_ro_n(fan, _input, offset); \
405 sysfs_ro_n(fan, _status, offset); \
406 sysfs_rw_n(fan, _ripple, offset, reg_ripple);
407
408#define sysfs_temp(offset, reg_status) \
409 sysfs_ro_n(temp, _input, offset); \
410 sysfs_ro_n(temp, _status, offset); \
411 sysfs_rw_n(temp, _reset, offset, reg_status);
412
413#define sysfs_watchdog(reg_wdog_preset, reg_wdog_state, reg_wdog_control) \
414 sysfs_rw(wdog, _control, reg_wdog_control); \
415 sysfs_rw(wdog, _preset, reg_wdog_preset); \
416 sysfs_rw(wdog, _state, reg_wdog_state);
417
418sysfs_fan_with_min(1, FSCPOS_REG_FAN_STATE[0], FSCPOS_REG_FAN_RIPPLE[0],
419 FSCPOS_REG_PWM[0]);
420sysfs_fan_with_min(2, FSCPOS_REG_FAN_STATE[1], FSCPOS_REG_FAN_RIPPLE[1],
421 FSCPOS_REG_PWM[1]);
422sysfs_fan(3, FSCPOS_REG_FAN_STATE[2], FSCPOS_REG_FAN_RIPPLE[2]);
423
424sysfs_temp(1, FSCPOS_REG_TEMP_STATE[0]);
425sysfs_temp(2, FSCPOS_REG_TEMP_STATE[1]);
426sysfs_temp(3, FSCPOS_REG_TEMP_STATE[2]);
427
428sysfs_watchdog(FSCPOS_REG_WDOG_PRESET, FSCPOS_REG_WDOG_STATE,
429 FSCPOS_REG_WDOG_CONTROL);
430
431static DEVICE_ATTR(event, S_IRUGO, show_event, NULL);
432static DEVICE_ATTR(in0_input, S_IRUGO, show_volt_12, NULL);
433static DEVICE_ATTR(in1_input, S_IRUGO, show_volt_5, NULL);
434static DEVICE_ATTR(in2_input, S_IRUGO, show_volt_batt, NULL);
435
Jean Delvare87808be2006-09-24 21:17:13 +0200436static struct attribute *fscpos_attributes[] = {
437 &dev_attr_event.attr,
438 &dev_attr_in0_input.attr,
439 &dev_attr_in1_input.attr,
440 &dev_attr_in2_input.attr,
441
442 &dev_attr_wdog_control.attr,
443 &dev_attr_wdog_preset.attr,
444 &dev_attr_wdog_state.attr,
445
446 &dev_attr_temp1_input.attr,
447 &dev_attr_temp1_status.attr,
448 &dev_attr_temp1_reset.attr,
449 &dev_attr_temp2_input.attr,
450 &dev_attr_temp2_status.attr,
451 &dev_attr_temp2_reset.attr,
452 &dev_attr_temp3_input.attr,
453 &dev_attr_temp3_status.attr,
454 &dev_attr_temp3_reset.attr,
455
456 &dev_attr_fan1_input.attr,
457 &dev_attr_fan1_status.attr,
458 &dev_attr_fan1_ripple.attr,
459 &dev_attr_pwm1.attr,
460 &dev_attr_fan2_input.attr,
461 &dev_attr_fan2_status.attr,
462 &dev_attr_fan2_ripple.attr,
463 &dev_attr_pwm2.attr,
464 &dev_attr_fan3_input.attr,
465 &dev_attr_fan3_status.attr,
466 &dev_attr_fan3_ripple.attr,
467 NULL
468};
469
470static const struct attribute_group fscpos_group = {
471 .attrs = fscpos_attributes,
472};
473
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474static int fscpos_attach_adapter(struct i2c_adapter *adapter)
475{
476 if (!(adapter->class & I2C_CLASS_HWMON))
477 return 0;
Jean Delvare2ed2dc32005-07-31 21:42:02 +0200478 return i2c_probe(adapter, &addr_data, fscpos_detect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479}
480
Ben Dooksc49efce2005-10-26 21:07:25 +0200481static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482{
483 struct i2c_client *new_client;
484 struct fscpos_data *data;
485 int err = 0;
486
487 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
488 goto exit;
489
490 /*
491 * OK. For now, we presume we have a valid client. We now create the
492 * client structure, even though we cannot fill it completely yet.
493 * But it allows us to access fscpos_{read,write}_value.
494 */
495
Deepak Saxenaba9c2e82005-10-17 23:08:32 +0200496 if (!(data = kzalloc(sizeof(struct fscpos_data), GFP_KERNEL))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 err = -ENOMEM;
498 goto exit;
499 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500
501 new_client = &data->client;
502 i2c_set_clientdata(new_client, data);
503 new_client->addr = address;
504 new_client->adapter = adapter;
505 new_client->driver = &fscpos_driver;
506 new_client->flags = 0;
507
508 /* Do the remaining detection unless force or force_fscpos parameter */
509 if (kind < 0) {
510 if ((fscpos_read_value(new_client, FSCPOS_REG_IDENT_0)
511 != 0x50) /* 'P' */
512 || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_1)
513 != 0x45) /* 'E' */
514 || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_2)
515 != 0x47))/* 'G' */
516 {
517 dev_dbg(&new_client->dev, "fscpos detection failed\n");
518 goto exit_free;
519 }
520 }
521
522 /* Fill in the remaining client fields and put it in the global list */
523 strlcpy(new_client->name, "fscpos", I2C_NAME_SIZE);
524
525 data->valid = 0;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100526 mutex_init(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527
528 /* Tell the I2C layer a new client has arrived */
529 if ((err = i2c_attach_client(new_client)))
530 goto exit_free;
531
532 /* Inizialize the fscpos chip */
533 fscpos_init_client(new_client);
534
535 /* Announce that the chip was found */
536 dev_info(&new_client->dev, "Found fscpos chip, rev %u\n", data->revision);
537
538 /* Register sysfs hooks */
Jean Delvare87808be2006-09-24 21:17:13 +0200539 if ((err = sysfs_create_group(&new_client->dev.kobj, &fscpos_group)))
540 goto exit_detach;
541
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400542 data->class_dev = hwmon_device_register(&new_client->dev);
543 if (IS_ERR(data->class_dev)) {
544 err = PTR_ERR(data->class_dev);
Jean Delvare87808be2006-09-24 21:17:13 +0200545 goto exit_remove_files;
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400546 }
547
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 return 0;
549
Jean Delvare87808be2006-09-24 21:17:13 +0200550exit_remove_files:
551 sysfs_remove_group(&new_client->dev.kobj, &fscpos_group);
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400552exit_detach:
553 i2c_detach_client(new_client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554exit_free:
555 kfree(data);
556exit:
557 return err;
558}
559
560static int fscpos_detach_client(struct i2c_client *client)
561{
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400562 struct fscpos_data *data = i2c_get_clientdata(client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 int err;
564
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400565 hwmon_device_unregister(data->class_dev);
Jean Delvare87808be2006-09-24 21:17:13 +0200566 sysfs_remove_group(&client->dev.kobj, &fscpos_group);
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400567
Jean Delvare7bef5592005-07-27 22:14:49 +0200568 if ((err = i2c_detach_client(client)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 return err;
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400570 kfree(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 return 0;
572}
573
574static int fscpos_read_value(struct i2c_client *client, u8 reg)
575{
576 dev_dbg(&client->dev, "Read reg 0x%02x\n", reg);
577 return i2c_smbus_read_byte_data(client, reg);
578}
579
580static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value)
581{
582 dev_dbg(&client->dev, "Write reg 0x%02x, val 0x%02x\n", reg, value);
583 return i2c_smbus_write_byte_data(client, reg, value);
584}
585
586/* Called when we have found a new FSCPOS chip */
587static void fscpos_init_client(struct i2c_client *client)
588{
589 struct fscpos_data *data = i2c_get_clientdata(client);
590
591 /* read revision from chip */
592 data->revision = fscpos_read_value(client, FSCPOS_REG_REVISION);
593}
594
595static struct fscpos_data *fscpos_update_device(struct device *dev)
596{
597 struct i2c_client *client = to_i2c_client(dev);
598 struct fscpos_data *data = i2c_get_clientdata(client);
599
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100600 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
Jean Delvare0cacdf22005-07-29 12:15:12 -0700602 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 int i;
604
605 dev_dbg(&client->dev, "Starting fscpos update\n");
606
607 for (i = 0; i < 3; i++) {
608 data->temp_act[i] = fscpos_read_value(client,
609 FSCPOS_REG_TEMP_ACT[i]);
610 data->temp_status[i] = fscpos_read_value(client,
611 FSCPOS_REG_TEMP_STATE[i]);
612 data->fan_act[i] = fscpos_read_value(client,
613 FSCPOS_REG_FAN_ACT[i]);
614 data->fan_status[i] = fscpos_read_value(client,
615 FSCPOS_REG_FAN_STATE[i]);
616 data->fan_ripple[i] = fscpos_read_value(client,
617 FSCPOS_REG_FAN_RIPPLE[i]);
618 if (i < 2) {
619 /* fan2_min is not supported by the chip */
620 data->pwm[i] = fscpos_read_value(client,
621 FSCPOS_REG_PWM[i]);
622 }
623 /* reset fan status if speed is back to > 0 */
624 if (data->fan_status[i] != 0 && data->fan_act[i] > 0) {
625 reset_fan_alarm(client, i);
626 }
627 }
628
629 data->volt[0] = fscpos_read_value(client, FSCPOS_REG_VOLT_12);
630 data->volt[1] = fscpos_read_value(client, FSCPOS_REG_VOLT_5);
631 data->volt[2] = fscpos_read_value(client, FSCPOS_REG_VOLT_BATT);
632
633 data->wdog_preset = fscpos_read_value(client,
634 FSCPOS_REG_WDOG_PRESET);
635 data->wdog_state = fscpos_read_value(client,
636 FSCPOS_REG_WDOG_STATE);
637 data->wdog_control = fscpos_read_value(client,
638 FSCPOS_REG_WDOG_CONTROL);
639
640 data->global_event = fscpos_read_value(client,
641 FSCPOS_REG_EVENT_STATE);
642
643 data->last_updated = jiffies;
644 data->valid = 1;
645 }
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100646 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 return data;
648}
649
650static int __init sm_fscpos_init(void)
651{
652 return i2c_add_driver(&fscpos_driver);
653}
654
655static void __exit sm_fscpos_exit(void)
656{
657 i2c_del_driver(&fscpos_driver);
658}
659
660MODULE_AUTHOR("Stefan Ott <stefan@desire.ch> based on work from Hermann Jung "
661 "<hej@odn.de>, Frodo Looijaard <frodol@dds.nl>"
662 " and Philip Edelbrock <phil@netroedge.com>");
663MODULE_DESCRIPTION("fujitsu siemens poseidon chip driver");
664MODULE_LICENSE("GPL");
665
666module_init(sm_fscpos_init);
667module_exit(sm_fscpos_exit);