pcmcia: CompactFlash driver for PA Semi Electra boards
[pv_ops_mirror.git] / drivers / hwmon / fscher.c
blobe67c36953b2d8d2f46c9af5825be753f16da1855
1 /*
2 * fscher.c - Part of lm_sensors, Linux kernel modules for hardware
3 * monitoring
4 * Copyright (C) 2003, 2004 Reinhard Nissl <rnissl@gmx.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 /*
22 * fujitsu siemens hermes chip,
23 * module based on fscpos.c
24 * Copyright (C) 2000 Hermann Jung <hej@odn.de>
25 * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
26 * and Philip Edelbrock <phil@netroedge.com>
29 #include <linux/module.h>
30 #include <linux/init.h>
31 #include <linux/slab.h>
32 #include <linux/jiffies.h>
33 #include <linux/i2c.h>
34 #include <linux/hwmon.h>
35 #include <linux/err.h>
36 #include <linux/mutex.h>
37 #include <linux/sysfs.h>
40 * Addresses to scan
43 static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
46 * Insmod parameters
49 I2C_CLIENT_INSMOD_1(fscher);
52 * The FSCHER registers
55 /* chip identification */
56 #define FSCHER_REG_IDENT_0 0x00
57 #define FSCHER_REG_IDENT_1 0x01
58 #define FSCHER_REG_IDENT_2 0x02
59 #define FSCHER_REG_REVISION 0x03
61 /* global control and status */
62 #define FSCHER_REG_EVENT_STATE 0x04
63 #define FSCHER_REG_CONTROL 0x05
65 /* watchdog */
66 #define FSCHER_REG_WDOG_PRESET 0x28
67 #define FSCHER_REG_WDOG_STATE 0x23
68 #define FSCHER_REG_WDOG_CONTROL 0x21
70 /* fan 0 */
71 #define FSCHER_REG_FAN0_MIN 0x55
72 #define FSCHER_REG_FAN0_ACT 0x0e
73 #define FSCHER_REG_FAN0_STATE 0x0d
74 #define FSCHER_REG_FAN0_RIPPLE 0x0f
76 /* fan 1 */
77 #define FSCHER_REG_FAN1_MIN 0x65
78 #define FSCHER_REG_FAN1_ACT 0x6b
79 #define FSCHER_REG_FAN1_STATE 0x62
80 #define FSCHER_REG_FAN1_RIPPLE 0x6f
82 /* fan 2 */
83 #define FSCHER_REG_FAN2_MIN 0xb5
84 #define FSCHER_REG_FAN2_ACT 0xbb
85 #define FSCHER_REG_FAN2_STATE 0xb2
86 #define FSCHER_REG_FAN2_RIPPLE 0xbf
88 /* voltage supervision */
89 #define FSCHER_REG_VOLT_12 0x45
90 #define FSCHER_REG_VOLT_5 0x42
91 #define FSCHER_REG_VOLT_BATT 0x48
93 /* temperature 0 */
94 #define FSCHER_REG_TEMP0_ACT 0x64
95 #define FSCHER_REG_TEMP0_STATE 0x71
97 /* temperature 1 */
98 #define FSCHER_REG_TEMP1_ACT 0x32
99 #define FSCHER_REG_TEMP1_STATE 0x81
101 /* temperature 2 */
102 #define FSCHER_REG_TEMP2_ACT 0x35
103 #define FSCHER_REG_TEMP2_STATE 0x91
106 * Functions declaration
109 static int fscher_attach_adapter(struct i2c_adapter *adapter);
110 static int fscher_detect(struct i2c_adapter *adapter, int address, int kind);
111 static int fscher_detach_client(struct i2c_client *client);
112 static struct fscher_data *fscher_update_device(struct device *dev);
113 static void fscher_init_client(struct i2c_client *client);
115 static int fscher_read_value(struct i2c_client *client, u8 reg);
116 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value);
119 * Driver data (common to all clients)
122 static struct i2c_driver fscher_driver = {
123 .driver = {
124 .name = "fscher",
126 .id = I2C_DRIVERID_FSCHER,
127 .attach_adapter = fscher_attach_adapter,
128 .detach_client = fscher_detach_client,
132 * Client data (each client gets its own)
135 struct fscher_data {
136 struct i2c_client client;
137 struct device *hwmon_dev;
138 struct mutex update_lock;
139 char valid; /* zero until following fields are valid */
140 unsigned long last_updated; /* in jiffies */
142 /* register values */
143 u8 revision; /* revision of chip */
144 u8 global_event; /* global event status */
145 u8 global_control; /* global control register */
146 u8 watchdog[3]; /* watchdog */
147 u8 volt[3]; /* 12, 5, battery voltage */
148 u8 temp_act[3]; /* temperature */
149 u8 temp_status[3]; /* status of sensor */
150 u8 fan_act[3]; /* fans revolutions per second */
151 u8 fan_status[3]; /* fan status */
152 u8 fan_min[3]; /* fan min value for rps */
153 u8 fan_ripple[3]; /* divider for rps */
157 * Sysfs stuff
160 #define sysfs_r(kind, sub, offset, reg) \
161 static ssize_t show_##kind##sub (struct fscher_data *, char *, int); \
162 static ssize_t show_##kind##offset##sub (struct device *, struct device_attribute *attr, char *); \
163 static ssize_t show_##kind##offset##sub (struct device *dev, struct device_attribute *attr, char *buf) \
165 struct fscher_data *data = fscher_update_device(dev); \
166 return show_##kind##sub(data, buf, (offset)); \
169 #define sysfs_w(kind, sub, offset, reg) \
170 static ssize_t set_##kind##sub (struct i2c_client *, struct fscher_data *, const char *, size_t, int, int); \
171 static ssize_t set_##kind##offset##sub (struct device *, struct device_attribute *attr, const char *, size_t); \
172 static ssize_t set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
174 struct i2c_client *client = to_i2c_client(dev); \
175 struct fscher_data *data = i2c_get_clientdata(client); \
176 return set_##kind##sub(client, data, buf, count, (offset), reg); \
179 #define sysfs_rw_n(kind, sub, offset, reg) \
180 sysfs_r(kind, sub, offset, reg) \
181 sysfs_w(kind, sub, offset, reg) \
182 static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, show_##kind##offset##sub, set_##kind##offset##sub);
184 #define sysfs_rw(kind, sub, reg) \
185 sysfs_r(kind, sub, 0, reg) \
186 sysfs_w(kind, sub, 0, reg) \
187 static DEVICE_ATTR(kind##sub, S_IRUGO | S_IWUSR, show_##kind##0##sub, set_##kind##0##sub);
189 #define sysfs_ro_n(kind, sub, offset, reg) \
190 sysfs_r(kind, sub, offset, reg) \
191 static DEVICE_ATTR(kind##offset##sub, S_IRUGO, show_##kind##offset##sub, NULL);
193 #define sysfs_ro(kind, sub, reg) \
194 sysfs_r(kind, sub, 0, reg) \
195 static DEVICE_ATTR(kind, S_IRUGO, show_##kind##0##sub, NULL);
197 #define sysfs_fan(offset, reg_status, reg_min, reg_ripple, reg_act) \
198 sysfs_rw_n(pwm, , offset, reg_min) \
199 sysfs_rw_n(fan, _status, offset, reg_status) \
200 sysfs_rw_n(fan, _div , offset, reg_ripple) \
201 sysfs_ro_n(fan, _input , offset, reg_act)
203 #define sysfs_temp(offset, reg_status, reg_act) \
204 sysfs_rw_n(temp, _status, offset, reg_status) \
205 sysfs_ro_n(temp, _input , offset, reg_act)
207 #define sysfs_in(offset, reg_act) \
208 sysfs_ro_n(in, _input, offset, reg_act)
210 #define sysfs_revision(reg_revision) \
211 sysfs_ro(revision, , reg_revision)
213 #define sysfs_alarms(reg_events) \
214 sysfs_ro(alarms, , reg_events)
216 #define sysfs_control(reg_control) \
217 sysfs_rw(control, , reg_control)
219 #define sysfs_watchdog(reg_control, reg_status, reg_preset) \
220 sysfs_rw(watchdog, _control, reg_control) \
221 sysfs_rw(watchdog, _status , reg_status) \
222 sysfs_rw(watchdog, _preset , reg_preset)
224 sysfs_fan(1, FSCHER_REG_FAN0_STATE, FSCHER_REG_FAN0_MIN,
225 FSCHER_REG_FAN0_RIPPLE, FSCHER_REG_FAN0_ACT)
226 sysfs_fan(2, FSCHER_REG_FAN1_STATE, FSCHER_REG_FAN1_MIN,
227 FSCHER_REG_FAN1_RIPPLE, FSCHER_REG_FAN1_ACT)
228 sysfs_fan(3, FSCHER_REG_FAN2_STATE, FSCHER_REG_FAN2_MIN,
229 FSCHER_REG_FAN2_RIPPLE, FSCHER_REG_FAN2_ACT)
231 sysfs_temp(1, FSCHER_REG_TEMP0_STATE, FSCHER_REG_TEMP0_ACT)
232 sysfs_temp(2, FSCHER_REG_TEMP1_STATE, FSCHER_REG_TEMP1_ACT)
233 sysfs_temp(3, FSCHER_REG_TEMP2_STATE, FSCHER_REG_TEMP2_ACT)
235 sysfs_in(0, FSCHER_REG_VOLT_12)
236 sysfs_in(1, FSCHER_REG_VOLT_5)
237 sysfs_in(2, FSCHER_REG_VOLT_BATT)
239 sysfs_revision(FSCHER_REG_REVISION)
240 sysfs_alarms(FSCHER_REG_EVENTS)
241 sysfs_control(FSCHER_REG_CONTROL)
242 sysfs_watchdog(FSCHER_REG_WDOG_CONTROL, FSCHER_REG_WDOG_STATE, FSCHER_REG_WDOG_PRESET)
244 static struct attribute *fscher_attributes[] = {
245 &dev_attr_revision.attr,
246 &dev_attr_alarms.attr,
247 &dev_attr_control.attr,
249 &dev_attr_watchdog_status.attr,
250 &dev_attr_watchdog_control.attr,
251 &dev_attr_watchdog_preset.attr,
253 &dev_attr_in0_input.attr,
254 &dev_attr_in1_input.attr,
255 &dev_attr_in2_input.attr,
257 &dev_attr_fan1_status.attr,
258 &dev_attr_fan1_div.attr,
259 &dev_attr_fan1_input.attr,
260 &dev_attr_pwm1.attr,
261 &dev_attr_fan2_status.attr,
262 &dev_attr_fan2_div.attr,
263 &dev_attr_fan2_input.attr,
264 &dev_attr_pwm2.attr,
265 &dev_attr_fan3_status.attr,
266 &dev_attr_fan3_div.attr,
267 &dev_attr_fan3_input.attr,
268 &dev_attr_pwm3.attr,
270 &dev_attr_temp1_status.attr,
271 &dev_attr_temp1_input.attr,
272 &dev_attr_temp2_status.attr,
273 &dev_attr_temp2_input.attr,
274 &dev_attr_temp3_status.attr,
275 &dev_attr_temp3_input.attr,
276 NULL
279 static const struct attribute_group fscher_group = {
280 .attrs = fscher_attributes,
284 * Real code
287 static int fscher_attach_adapter(struct i2c_adapter *adapter)
289 if (!(adapter->class & I2C_CLASS_HWMON))
290 return 0;
291 return i2c_probe(adapter, &addr_data, fscher_detect);
294 static int fscher_detect(struct i2c_adapter *adapter, int address, int kind)
296 struct i2c_client *new_client;
297 struct fscher_data *data;
298 int err = 0;
300 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
301 goto exit;
303 /* OK. For now, we presume we have a valid client. We now create the
304 * client structure, even though we cannot fill it completely yet.
305 * But it allows us to access i2c_smbus_read_byte_data. */
306 if (!(data = kzalloc(sizeof(struct fscher_data), GFP_KERNEL))) {
307 err = -ENOMEM;
308 goto exit;
311 /* The common I2C client data is placed right before the
312 * Hermes-specific data. */
313 new_client = &data->client;
314 i2c_set_clientdata(new_client, data);
315 new_client->addr = address;
316 new_client->adapter = adapter;
317 new_client->driver = &fscher_driver;
318 new_client->flags = 0;
320 /* Do the remaining detection unless force or force_fscher parameter */
321 if (kind < 0) {
322 if ((i2c_smbus_read_byte_data(new_client,
323 FSCHER_REG_IDENT_0) != 0x48) /* 'H' */
324 || (i2c_smbus_read_byte_data(new_client,
325 FSCHER_REG_IDENT_1) != 0x45) /* 'E' */
326 || (i2c_smbus_read_byte_data(new_client,
327 FSCHER_REG_IDENT_2) != 0x52)) /* 'R' */
328 goto exit_free;
331 /* Fill in the remaining client fields and put it into the
332 * global list */
333 strlcpy(new_client->name, "fscher", I2C_NAME_SIZE);
334 data->valid = 0;
335 mutex_init(&data->update_lock);
337 /* Tell the I2C layer a new client has arrived */
338 if ((err = i2c_attach_client(new_client)))
339 goto exit_free;
341 fscher_init_client(new_client);
343 /* Register sysfs hooks */
344 if ((err = sysfs_create_group(&new_client->dev.kobj, &fscher_group)))
345 goto exit_detach;
347 data->hwmon_dev = hwmon_device_register(&new_client->dev);
348 if (IS_ERR(data->hwmon_dev)) {
349 err = PTR_ERR(data->hwmon_dev);
350 goto exit_remove_files;
353 return 0;
355 exit_remove_files:
356 sysfs_remove_group(&new_client->dev.kobj, &fscher_group);
357 exit_detach:
358 i2c_detach_client(new_client);
359 exit_free:
360 kfree(data);
361 exit:
362 return err;
365 static int fscher_detach_client(struct i2c_client *client)
367 struct fscher_data *data = i2c_get_clientdata(client);
368 int err;
370 hwmon_device_unregister(data->hwmon_dev);
371 sysfs_remove_group(&client->dev.kobj, &fscher_group);
373 if ((err = i2c_detach_client(client)))
374 return err;
376 kfree(data);
377 return 0;
380 static int fscher_read_value(struct i2c_client *client, u8 reg)
382 dev_dbg(&client->dev, "read reg 0x%02x\n", reg);
384 return i2c_smbus_read_byte_data(client, reg);
387 static int fscher_write_value(struct i2c_client *client, u8 reg, u8 value)
389 dev_dbg(&client->dev, "write reg 0x%02x, val 0x%02x\n",
390 reg, value);
392 return i2c_smbus_write_byte_data(client, reg, value);
395 /* Called when we have found a new FSC Hermes. */
396 static void fscher_init_client(struct i2c_client *client)
398 struct fscher_data *data = i2c_get_clientdata(client);
400 /* Read revision from chip */
401 data->revision = fscher_read_value(client, FSCHER_REG_REVISION);
404 static struct fscher_data *fscher_update_device(struct device *dev)
406 struct i2c_client *client = to_i2c_client(dev);
407 struct fscher_data *data = i2c_get_clientdata(client);
409 mutex_lock(&data->update_lock);
411 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
413 dev_dbg(&client->dev, "Starting fscher update\n");
415 data->temp_act[0] = fscher_read_value(client, FSCHER_REG_TEMP0_ACT);
416 data->temp_act[1] = fscher_read_value(client, FSCHER_REG_TEMP1_ACT);
417 data->temp_act[2] = fscher_read_value(client, FSCHER_REG_TEMP2_ACT);
418 data->temp_status[0] = fscher_read_value(client, FSCHER_REG_TEMP0_STATE);
419 data->temp_status[1] = fscher_read_value(client, FSCHER_REG_TEMP1_STATE);
420 data->temp_status[2] = fscher_read_value(client, FSCHER_REG_TEMP2_STATE);
422 data->volt[0] = fscher_read_value(client, FSCHER_REG_VOLT_12);
423 data->volt[1] = fscher_read_value(client, FSCHER_REG_VOLT_5);
424 data->volt[2] = fscher_read_value(client, FSCHER_REG_VOLT_BATT);
426 data->fan_act[0] = fscher_read_value(client, FSCHER_REG_FAN0_ACT);
427 data->fan_act[1] = fscher_read_value(client, FSCHER_REG_FAN1_ACT);
428 data->fan_act[2] = fscher_read_value(client, FSCHER_REG_FAN2_ACT);
429 data->fan_status[0] = fscher_read_value(client, FSCHER_REG_FAN0_STATE);
430 data->fan_status[1] = fscher_read_value(client, FSCHER_REG_FAN1_STATE);
431 data->fan_status[2] = fscher_read_value(client, FSCHER_REG_FAN2_STATE);
432 data->fan_min[0] = fscher_read_value(client, FSCHER_REG_FAN0_MIN);
433 data->fan_min[1] = fscher_read_value(client, FSCHER_REG_FAN1_MIN);
434 data->fan_min[2] = fscher_read_value(client, FSCHER_REG_FAN2_MIN);
435 data->fan_ripple[0] = fscher_read_value(client, FSCHER_REG_FAN0_RIPPLE);
436 data->fan_ripple[1] = fscher_read_value(client, FSCHER_REG_FAN1_RIPPLE);
437 data->fan_ripple[2] = fscher_read_value(client, FSCHER_REG_FAN2_RIPPLE);
439 data->watchdog[0] = fscher_read_value(client, FSCHER_REG_WDOG_PRESET);
440 data->watchdog[1] = fscher_read_value(client, FSCHER_REG_WDOG_STATE);
441 data->watchdog[2] = fscher_read_value(client, FSCHER_REG_WDOG_CONTROL);
443 data->global_event = fscher_read_value(client, FSCHER_REG_EVENT_STATE);
444 data->global_control = fscher_read_value(client,
445 FSCHER_REG_CONTROL);
447 data->last_updated = jiffies;
448 data->valid = 1;
451 mutex_unlock(&data->update_lock);
453 return data;
458 #define FAN_INDEX_FROM_NUM(nr) ((nr) - 1)
460 static ssize_t set_fan_status(struct i2c_client *client, struct fscher_data *data,
461 const char *buf, size_t count, int nr, int reg)
463 /* bits 0..1, 3..7 reserved => mask with 0x04 */
464 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x04;
466 mutex_lock(&data->update_lock);
467 data->fan_status[FAN_INDEX_FROM_NUM(nr)] &= ~v;
468 fscher_write_value(client, reg, v);
469 mutex_unlock(&data->update_lock);
470 return count;
473 static ssize_t show_fan_status(struct fscher_data *data, char *buf, int nr)
475 /* bits 0..1, 3..7 reserved => mask with 0x04 */
476 return sprintf(buf, "%u\n", data->fan_status[FAN_INDEX_FROM_NUM(nr)] & 0x04);
479 static ssize_t set_pwm(struct i2c_client *client, struct fscher_data *data,
480 const char *buf, size_t count, int nr, int reg)
482 unsigned long v = simple_strtoul(buf, NULL, 10);
484 mutex_lock(&data->update_lock);
485 data->fan_min[FAN_INDEX_FROM_NUM(nr)] = v > 0xff ? 0xff : v;
486 fscher_write_value(client, reg, data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
487 mutex_unlock(&data->update_lock);
488 return count;
491 static ssize_t show_pwm(struct fscher_data *data, char *buf, int nr)
493 return sprintf(buf, "%u\n", data->fan_min[FAN_INDEX_FROM_NUM(nr)]);
496 static ssize_t set_fan_div(struct i2c_client *client, struct fscher_data *data,
497 const char *buf, size_t count, int nr, int reg)
499 /* supported values: 2, 4, 8 */
500 unsigned long v = simple_strtoul(buf, NULL, 10);
502 switch (v) {
503 case 2: v = 1; break;
504 case 4: v = 2; break;
505 case 8: v = 3; break;
506 default:
507 dev_err(&client->dev, "fan_div value %ld not "
508 "supported. Choose one of 2, 4 or 8!\n", v);
509 return -EINVAL;
512 mutex_lock(&data->update_lock);
514 /* bits 2..7 reserved => mask with 0x03 */
515 data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] &= ~0x03;
516 data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] |= v;
518 fscher_write_value(client, reg, data->fan_ripple[FAN_INDEX_FROM_NUM(nr)]);
519 mutex_unlock(&data->update_lock);
520 return count;
523 static ssize_t show_fan_div(struct fscher_data *data, char *buf, int nr)
525 /* bits 2..7 reserved => mask with 0x03 */
526 return sprintf(buf, "%u\n", 1 << (data->fan_ripple[FAN_INDEX_FROM_NUM(nr)] & 0x03));
529 #define RPM_FROM_REG(val) (val*60)
531 static ssize_t show_fan_input (struct fscher_data *data, char *buf, int nr)
533 return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[FAN_INDEX_FROM_NUM(nr)]));
538 #define TEMP_INDEX_FROM_NUM(nr) ((nr) - 1)
540 static ssize_t set_temp_status(struct i2c_client *client, struct fscher_data *data,
541 const char *buf, size_t count, int nr, int reg)
543 /* bits 2..7 reserved, 0 read only => mask with 0x02 */
544 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
546 mutex_lock(&data->update_lock);
547 data->temp_status[TEMP_INDEX_FROM_NUM(nr)] &= ~v;
548 fscher_write_value(client, reg, v);
549 mutex_unlock(&data->update_lock);
550 return count;
553 static ssize_t show_temp_status(struct fscher_data *data, char *buf, int nr)
555 /* bits 2..7 reserved => mask with 0x03 */
556 return sprintf(buf, "%u\n", data->temp_status[TEMP_INDEX_FROM_NUM(nr)] & 0x03);
559 #define TEMP_FROM_REG(val) (((val) - 128) * 1000)
561 static ssize_t show_temp_input(struct fscher_data *data, char *buf, int nr)
563 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[TEMP_INDEX_FROM_NUM(nr)]));
567 * The final conversion is specified in sensors.conf, as it depends on
568 * mainboard specific values. We export the registers contents as
569 * pseudo-hundredths-of-Volts (range 0V - 2.55V). Not that it makes much
570 * sense per se, but it minimizes the conversions count and keeps the
571 * values within a usual range.
573 #define VOLT_FROM_REG(val) ((val) * 10)
575 static ssize_t show_in_input(struct fscher_data *data, char *buf, int nr)
577 return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[nr]));
582 static ssize_t show_revision(struct fscher_data *data, char *buf, int nr)
584 return sprintf(buf, "%u\n", data->revision);
589 static ssize_t show_alarms(struct fscher_data *data, char *buf, int nr)
591 /* bits 2, 5..6 reserved => mask with 0x9b */
592 return sprintf(buf, "%u\n", data->global_event & 0x9b);
597 static ssize_t set_control(struct i2c_client *client, struct fscher_data *data,
598 const char *buf, size_t count, int nr, int reg)
600 /* bits 1..7 reserved => mask with 0x01 */
601 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x01;
603 mutex_lock(&data->update_lock);
604 data->global_control = v;
605 fscher_write_value(client, reg, v);
606 mutex_unlock(&data->update_lock);
607 return count;
610 static ssize_t show_control(struct fscher_data *data, char *buf, int nr)
612 /* bits 1..7 reserved => mask with 0x01 */
613 return sprintf(buf, "%u\n", data->global_control & 0x01);
618 static ssize_t set_watchdog_control(struct i2c_client *client, struct
619 fscher_data *data, const char *buf, size_t count,
620 int nr, int reg)
622 /* bits 0..3 reserved => mask with 0xf0 */
623 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0;
625 mutex_lock(&data->update_lock);
626 data->watchdog[2] &= ~0xf0;
627 data->watchdog[2] |= v;
628 fscher_write_value(client, reg, data->watchdog[2]);
629 mutex_unlock(&data->update_lock);
630 return count;
633 static ssize_t show_watchdog_control(struct fscher_data *data, char *buf, int nr)
635 /* bits 0..3 reserved, bit 5 write only => mask with 0xd0 */
636 return sprintf(buf, "%u\n", data->watchdog[2] & 0xd0);
639 static ssize_t set_watchdog_status(struct i2c_client *client, struct fscher_data *data,
640 const char *buf, size_t count, int nr, int reg)
642 /* bits 0, 2..7 reserved => mask with 0x02 */
643 unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02;
645 mutex_lock(&data->update_lock);
646 data->watchdog[1] &= ~v;
647 fscher_write_value(client, reg, v);
648 mutex_unlock(&data->update_lock);
649 return count;
652 static ssize_t show_watchdog_status(struct fscher_data *data, char *buf, int nr)
654 /* bits 0, 2..7 reserved => mask with 0x02 */
655 return sprintf(buf, "%u\n", data->watchdog[1] & 0x02);
658 static ssize_t set_watchdog_preset(struct i2c_client *client, struct fscher_data *data,
659 const char *buf, size_t count, int nr, int reg)
661 unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff;
663 mutex_lock(&data->update_lock);
664 data->watchdog[0] = v;
665 fscher_write_value(client, reg, data->watchdog[0]);
666 mutex_unlock(&data->update_lock);
667 return count;
670 static ssize_t show_watchdog_preset(struct fscher_data *data, char *buf, int nr)
672 return sprintf(buf, "%u\n", data->watchdog[0]);
675 static int __init sensors_fscher_init(void)
677 return i2c_add_driver(&fscher_driver);
680 static void __exit sensors_fscher_exit(void)
682 i2c_del_driver(&fscher_driver);
685 MODULE_AUTHOR("Reinhard Nissl <rnissl@gmx.de>");
686 MODULE_DESCRIPTION("FSC Hermes driver");
687 MODULE_LICENSE("GPL");
689 module_init(sensors_fscher_init);
690 module_exit(sensors_fscher_exit);