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md: don't reset curr_resync_completed after an interrupted resync
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / hwmon / fschmd.c
blob281829cd1533824b62b12d66d7c7e78c7c5b7623
1 /* fschmd.c
2 *
3 * Copyright (C) 2007 - 2009 Hans de Goede <hdegoede@redhat.com>
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 * Merged Fujitsu Siemens hwmon driver, supporting the Poseidon, Hermes,
22 * Scylla, Heracles, Heimdall, Hades and Syleus chips
23 *
24 * Based on the original 2.4 fscscy, 2.6 fscpos, 2.6 fscher and 2.6
25 * (candidate) fschmd drivers:
26 * Copyright (C) 2006 Thilo Cestonaro
27 * <thilo.cestonaro.external@fujitsu-siemens.com>
28 * Copyright (C) 2004, 2005 Stefan Ott <stefan@desire.ch>
29 * Copyright (C) 2003, 2004 Reinhard Nissl <rnissl@gmx.de>
30 * Copyright (c) 2001 Martin Knoblauch <mkn@teraport.de, knobi@knobisoft.de>
31 * Copyright (C) 2000 Hermann Jung <hej@odn.de>
32 */
33
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <linux/slab.h>
37 #include <linux/jiffies.h>
38 #include <linux/i2c.h>
39 #include <linux/hwmon.h>
40 #include <linux/hwmon-sysfs.h>
41 #include <linux/err.h>
42 #include <linux/mutex.h>
43 #include <linux/sysfs.h>
44 #include <linux/dmi.h>
45 #include <linux/fs.h>
46 #include <linux/watchdog.h>
47 #include <linux/miscdevice.h>
48 #include <linux/uaccess.h>
49 #include <linux/kref.h>
50
51 /* Addresses to scan */
52 static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
53
54 /* Insmod parameters */
55 static int nowayout = WATCHDOG_NOWAYOUT;
56 module_param(nowayout, int, 0);
57 MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
58 __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
59 I2C_CLIENT_INSMOD_7(fscpos, fscher, fscscy, fschrc, fschmd, fschds, fscsyl);
60
61 /*
62 * The FSCHMD registers and other defines
63 */
64
65 /* chip identification */
66 #define FSCHMD_REG_IDENT_0 0x00
67 #define FSCHMD_REG_IDENT_1 0x01
68 #define FSCHMD_REG_IDENT_2 0x02
69 #define FSCHMD_REG_REVISION 0x03
70
71 /* global control and status */
72 #define FSCHMD_REG_EVENT_STATE 0x04
73 #define FSCHMD_REG_CONTROL 0x05
74
75 #define FSCHMD_CONTROL_ALERT_LED 0x01
76
77 /* watchdog */
78 static const u8 FSCHMD_REG_WDOG_CONTROL[7] =
79 { 0x21, 0x21, 0x21, 0x21, 0x21, 0x28, 0x28 };
80 static const u8 FSCHMD_REG_WDOG_STATE[7] =
81 { 0x23, 0x23, 0x23, 0x23, 0x23, 0x29, 0x29 };
82 static const u8 FSCHMD_REG_WDOG_PRESET[7] =
83 { 0x28, 0x28, 0x28, 0x28, 0x28, 0x2a, 0x2a };
84
85 #define FSCHMD_WDOG_CONTROL_TRIGGER 0x10
86 #define FSCHMD_WDOG_CONTROL_STARTED 0x10 /* the same as trigger */
87 #define FSCHMD_WDOG_CONTROL_STOP 0x20
88 #define FSCHMD_WDOG_CONTROL_RESOLUTION 0x40
89
90 #define FSCHMD_WDOG_STATE_CARDRESET 0x02
91
92 /* voltages, weird order is to keep the same order as the old drivers */
93 static const u8 FSCHMD_REG_VOLT[7][6] = {
94 { 0x45, 0x42, 0x48 }, /* pos */
95 { 0x45, 0x42, 0x48 }, /* her */
96 { 0x45, 0x42, 0x48 }, /* scy */
97 { 0x45, 0x42, 0x48 }, /* hrc */
98 { 0x45, 0x42, 0x48 }, /* hmd */
99 { 0x21, 0x20, 0x22 }, /* hds */
100 { 0x21, 0x20, 0x22, 0x23, 0x24, 0x25 }, /* syl */
101 };
102
103 static const int FSCHMD_NO_VOLT_SENSORS[7] = { 3, 3, 3, 3, 3, 3, 6 };
104
105 /* minimum pwm at which the fan is driven (pwm can by increased depending on
106 the temp. Notice that for the scy some fans share there minimum speed.
107 Also notice that with the scy the sensor order is different than with the
108 other chips, this order was in the 2.4 driver and kept for consistency. */
109 static const u8 FSCHMD_REG_FAN_MIN[7][7] = {
110 { 0x55, 0x65 }, /* pos */
111 { 0x55, 0x65, 0xb5 }, /* her */
112 { 0x65, 0x65, 0x55, 0xa5, 0x55, 0xa5 }, /* scy */
113 { 0x55, 0x65, 0xa5, 0xb5 }, /* hrc */
114 { 0x55, 0x65, 0xa5, 0xb5, 0xc5 }, /* hmd */
115 { 0x55, 0x65, 0xa5, 0xb5, 0xc5 }, /* hds */
116 { 0x54, 0x64, 0x74, 0x84, 0x94, 0xa4, 0xb4 }, /* syl */
117 };
118
119 /* actual fan speed */
120 static const u8 FSCHMD_REG_FAN_ACT[7][7] = {
121 { 0x0e, 0x6b, 0xab }, /* pos */
122 { 0x0e, 0x6b, 0xbb }, /* her */
123 { 0x6b, 0x6c, 0x0e, 0xab, 0x5c, 0xbb }, /* scy */
124 { 0x0e, 0x6b, 0xab, 0xbb }, /* hrc */
125 { 0x5b, 0x6b, 0xab, 0xbb, 0xcb }, /* hmd */
126 { 0x5b, 0x6b, 0xab, 0xbb, 0xcb }, /* hds */
127 { 0x57, 0x67, 0x77, 0x87, 0x97, 0xa7, 0xb7 }, /* syl */
128 };
129
130 /* fan status registers */
131 static const u8 FSCHMD_REG_FAN_STATE[7][7] = {
132 { 0x0d, 0x62, 0xa2 }, /* pos */
133 { 0x0d, 0x62, 0xb2 }, /* her */
134 { 0x62, 0x61, 0x0d, 0xa2, 0x52, 0xb2 }, /* scy */
135 { 0x0d, 0x62, 0xa2, 0xb2 }, /* hrc */
136 { 0x52, 0x62, 0xa2, 0xb2, 0xc2 }, /* hmd */
137 { 0x52, 0x62, 0xa2, 0xb2, 0xc2 }, /* hds */
138 { 0x50, 0x60, 0x70, 0x80, 0x90, 0xa0, 0xb0 }, /* syl */
139 };
140
141 /* fan ripple / divider registers */
142 static const u8 FSCHMD_REG_FAN_RIPPLE[7][7] = {
143 { 0x0f, 0x6f, 0xaf }, /* pos */
144 { 0x0f, 0x6f, 0xbf }, /* her */
145 { 0x6f, 0x6f, 0x0f, 0xaf, 0x0f, 0xbf }, /* scy */
146 { 0x0f, 0x6f, 0xaf, 0xbf }, /* hrc */
147 { 0x5f, 0x6f, 0xaf, 0xbf, 0xcf }, /* hmd */
148 { 0x5f, 0x6f, 0xaf, 0xbf, 0xcf }, /* hds */
149 { 0x56, 0x66, 0x76, 0x86, 0x96, 0xa6, 0xb6 }, /* syl */
150 };
151
152 static const int FSCHMD_NO_FAN_SENSORS[7] = { 3, 3, 6, 4, 5, 5, 7 };
153
154 /* Fan status register bitmasks */
155 #define FSCHMD_FAN_ALARM 0x04 /* called fault by FSC! */
156 #define FSCHMD_FAN_NOT_PRESENT 0x08
157 #define FSCHMD_FAN_DISABLED 0x80
158
159
160 /* actual temperature registers */
161 static const u8 FSCHMD_REG_TEMP_ACT[7][11] = {
162 { 0x64, 0x32, 0x35 }, /* pos */
163 { 0x64, 0x32, 0x35 }, /* her */
164 { 0x64, 0xD0, 0x32, 0x35 }, /* scy */
165 { 0x64, 0x32, 0x35 }, /* hrc */
166 { 0x70, 0x80, 0x90, 0xd0, 0xe0 }, /* hmd */
167 { 0x70, 0x80, 0x90, 0xd0, 0xe0 }, /* hds */
168 { 0x58, 0x68, 0x78, 0x88, 0x98, 0xa8, /* syl */
169 0xb8, 0xc8, 0xd8, 0xe8, 0xf8 },
170 };
171
172 /* temperature state registers */
173 static const u8 FSCHMD_REG_TEMP_STATE[7][11] = {
174 { 0x71, 0x81, 0x91 }, /* pos */
175 { 0x71, 0x81, 0x91 }, /* her */
176 { 0x71, 0xd1, 0x81, 0x91 }, /* scy */
177 { 0x71, 0x81, 0x91 }, /* hrc */
178 { 0x71, 0x81, 0x91, 0xd1, 0xe1 }, /* hmd */
179 { 0x71, 0x81, 0x91, 0xd1, 0xe1 }, /* hds */
180 { 0x59, 0x69, 0x79, 0x89, 0x99, 0xa9, /* syl */
181 0xb9, 0xc9, 0xd9, 0xe9, 0xf9 },
182 };
183
184 /* temperature high limit registers, FSC does not document these. Proven to be
185 there with field testing on the fscher and fschrc, already supported / used
186 in the fscscy 2.4 driver. FSC has confirmed that the fschmd has registers
187 at these addresses, but doesn't want to confirm they are the same as with
188 the fscher?? */
189 static const u8 FSCHMD_REG_TEMP_LIMIT[7][11] = {
190 { 0, 0, 0 }, /* pos */
191 { 0x76, 0x86, 0x96 }, /* her */
192 { 0x76, 0xd6, 0x86, 0x96 }, /* scy */
193 { 0x76, 0x86, 0x96 }, /* hrc */
194 { 0x76, 0x86, 0x96, 0xd6, 0xe6 }, /* hmd */
195 { 0x76, 0x86, 0x96, 0xd6, 0xe6 }, /* hds */
196 { 0x5a, 0x6a, 0x7a, 0x8a, 0x9a, 0xaa, /* syl */
197 0xba, 0xca, 0xda, 0xea, 0xfa },
198 };
199
200 /* These were found through experimenting with an fscher, currently they are
201 not used, but we keep them around for future reference.
202 On the fscsyl AUTOP1 lives at 0x#c (so 0x5c for fan1, 0x6c for fan2, etc),
203 AUTOP2 lives at 0x#e, and 0x#1 is a bitmask defining which temps influence
204 the fan speed.
205 static const u8 FSCHER_REG_TEMP_AUTOP1[] = { 0x73, 0x83, 0x93 };
206 static const u8 FSCHER_REG_TEMP_AUTOP2[] = { 0x75, 0x85, 0x95 }; */
207
208 static const int FSCHMD_NO_TEMP_SENSORS[7] = { 3, 3, 4, 3, 5, 5, 11 };
209
210 /* temp status register bitmasks */
211 #define FSCHMD_TEMP_WORKING 0x01
212 #define FSCHMD_TEMP_ALERT 0x02
213 #define FSCHMD_TEMP_DISABLED 0x80
214 /* there only really is an alarm if the sensor is working and alert == 1 */
215 #define FSCHMD_TEMP_ALARM_MASK \
216 (FSCHMD_TEMP_WORKING | FSCHMD_TEMP_ALERT)
217
218 /*
219 * Functions declarations
220 */
221
222 static int fschmd_probe(struct i2c_client *client,
223 const struct i2c_device_id *id);
224 static int fschmd_detect(struct i2c_client *client, int kind,
225 struct i2c_board_info *info);
226 static int fschmd_remove(struct i2c_client *client);
227 static struct fschmd_data *fschmd_update_device(struct device *dev);
228
229 /*
230 * Driver data (common to all clients)
231 */
232
233 static const struct i2c_device_id fschmd_id[] = {
234 { "fscpos", fscpos },
235 { "fscher", fscher },
236 { "fscscy", fscscy },
237 { "fschrc", fschrc },
238 { "fschmd", fschmd },
239 { "fschds", fschds },
240 { "fscsyl", fscsyl },
241 { }
242 };
243 MODULE_DEVICE_TABLE(i2c, fschmd_id);
244
245 static struct i2c_driver fschmd_driver = {
246 .class = I2C_CLASS_HWMON,
247 .driver = {
248 .name = "fschmd",
249 },
250 .probe = fschmd_probe,
251 .remove = fschmd_remove,
252 .id_table = fschmd_id,
253 .detect = fschmd_detect,
254 .address_data = &addr_data,
255 };
256
257 /*
258 * Client data (each client gets its own)
259 */
260
261 struct fschmd_data {
262 struct i2c_client *client;
263 struct device *hwmon_dev;
264 struct mutex update_lock;
265 struct mutex watchdog_lock;
266 struct list_head list; /* member of the watchdog_data_list */
267 struct kref kref;
268 struct miscdevice watchdog_miscdev;
269 int kind;
270 unsigned long watchdog_is_open;
271 char watchdog_expect_close;
272 char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
273 char valid; /* zero until following fields are valid */
274 unsigned long last_updated; /* in jiffies */
275
276 /* register values */
277 u8 revision; /* chip revision */
278 u8 global_control; /* global control register */
279 u8 watchdog_control; /* watchdog control register */
280 u8 watchdog_state; /* watchdog status register */
281 u8 watchdog_preset; /* watchdog counter preset on trigger val */
282 u8 volt[6]; /* voltage */
283 u8 temp_act[11]; /* temperature */
284 u8 temp_status[11]; /* status of sensor */
285 u8 temp_max[11]; /* high temp limit, notice: undocumented! */
286 u8 fan_act[7]; /* fans revolutions per second */
287 u8 fan_status[7]; /* fan status */
288 u8 fan_min[7]; /* fan min value for rps */
289 u8 fan_ripple[7]; /* divider for rps */
290 };
291
292 /* Global variables to hold information read from special DMI tables, which are
293 available on FSC machines with an fscher or later chip. There is no need to
294 protect these with a lock as they are only modified from our attach function
295 which always gets called with the i2c-core lock held and never accessed
296 before the attach function is done with them. */
297 static int dmi_mult[6] = { 490, 200, 100, 100, 200, 100 };
298 static int dmi_offset[6] = { 0, 0, 0, 0, 0, 0 };
299 static int dmi_vref = -1;
300
301 /* Somewhat ugly :( global data pointer list with all fschmd devices, so that
302 we can find our device data as when using misc_register there is no other
303 method to get to ones device data from the open fop. */
304 static LIST_HEAD(watchdog_data_list);
305 /* Note this lock not only protect list access, but also data.kref access */
306 static DEFINE_MUTEX(watchdog_data_mutex);
307
308 /* Release our data struct when we're detached from the i2c client *and* all
309 references to our watchdog device are released */
310 static void fschmd_release_resources(struct kref *ref)
311 {
312 struct fschmd_data *data = container_of(ref, struct fschmd_data, kref);
313 kfree(data);
314 }
315
316 /*
317 * Sysfs attr show / store functions
318 */
319
320 static ssize_t show_in_value(struct device *dev,
321 struct device_attribute *devattr, char *buf)
322 {
323 const int max_reading[3] = { 14200, 6600, 3300 };
324 int index = to_sensor_dev_attr(devattr)->index;
325 struct fschmd_data *data = fschmd_update_device(dev);
326
327 /* fscher / fschrc - 1 as data->kind is an array index, not a chips */
328 if (data->kind == (fscher - 1) || data->kind >= (fschrc - 1))
329 return sprintf(buf, "%d\n", (data->volt[index] * dmi_vref *
330 dmi_mult[index]) / 255 + dmi_offset[index]);
331 else
332 return sprintf(buf, "%d\n", (data->volt[index] *
333 max_reading[index] + 128) / 255);
334 }
335
336
337 #define TEMP_FROM_REG(val) (((val) - 128) * 1000)
338
339 static ssize_t show_temp_value(struct device *dev,
340 struct device_attribute *devattr, char *buf)
341 {
342 int index = to_sensor_dev_attr(devattr)->index;
343 struct fschmd_data *data = fschmd_update_device(dev);
344
345 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[index]));
346 }
347
348 static ssize_t show_temp_max(struct device *dev,
349 struct device_attribute *devattr, char *buf)
350 {
351 int index = to_sensor_dev_attr(devattr)->index;
352 struct fschmd_data *data = fschmd_update_device(dev);
353
354 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index]));
355 }
356
357 static ssize_t store_temp_max(struct device *dev, struct device_attribute
358 *devattr, const char *buf, size_t count)
359 {
360 int index = to_sensor_dev_attr(devattr)->index;
361 struct fschmd_data *data = dev_get_drvdata(dev);
362 long v = simple_strtol(buf, NULL, 10) / 1000;
363
364 v = SENSORS_LIMIT(v, -128, 127) + 128;
365
366 mutex_lock(&data->update_lock);
367 i2c_smbus_write_byte_data(to_i2c_client(dev),
368 FSCHMD_REG_TEMP_LIMIT[data->kind][index], v);
369 data->temp_max[index] = v;
370 mutex_unlock(&data->update_lock);
371
372 return count;
373 }
374
375 static ssize_t show_temp_fault(struct device *dev,
376 struct device_attribute *devattr, char *buf)
377 {
378 int index = to_sensor_dev_attr(devattr)->index;
379 struct fschmd_data *data = fschmd_update_device(dev);
380
381 /* bit 0 set means sensor working ok, so no fault! */
382 if (data->temp_status[index] & FSCHMD_TEMP_WORKING)
383 return sprintf(buf, "0\n");
384 else
385 return sprintf(buf, "1\n");
386 }
387
388 static ssize_t show_temp_alarm(struct device *dev,
389 struct device_attribute *devattr, char *buf)
390 {
391 int index = to_sensor_dev_attr(devattr)->index;
392 struct fschmd_data *data = fschmd_update_device(dev);
393
394 if ((data->temp_status[index] & FSCHMD_TEMP_ALARM_MASK) ==
395 FSCHMD_TEMP_ALARM_MASK)
396 return sprintf(buf, "1\n");
397 else
398 return sprintf(buf, "0\n");
399 }
400
401
402 #define RPM_FROM_REG(val) ((val) * 60)
403
404 static ssize_t show_fan_value(struct device *dev,
405 struct device_attribute *devattr, char *buf)
406 {
407 int index = to_sensor_dev_attr(devattr)->index;
408 struct fschmd_data *data = fschmd_update_device(dev);
409
410 return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[index]));
411 }
412
413 static ssize_t show_fan_div(struct device *dev,
414 struct device_attribute *devattr, char *buf)
415 {
416 int index = to_sensor_dev_attr(devattr)->index;
417 struct fschmd_data *data = fschmd_update_device(dev);
418
419 /* bits 2..7 reserved => mask with 3 */
420 return sprintf(buf, "%d\n", 1 << (data->fan_ripple[index] & 3));
421 }
422
423 static ssize_t store_fan_div(struct device *dev, struct device_attribute
424 *devattr, const char *buf, size_t count)
425 {
426 u8 reg;
427 int index = to_sensor_dev_attr(devattr)->index;
428 struct fschmd_data *data = dev_get_drvdata(dev);
429 /* supported values: 2, 4, 8 */
430 unsigned long v = simple_strtoul(buf, NULL, 10);
431
432 switch (v) {
433 case 2: v = 1; break;
434 case 4: v = 2; break;
435 case 8: v = 3; break;
436 default:
437 dev_err(dev, "fan_div value %lu not supported. "
438 "Choose one of 2, 4 or 8!\n", v);
439 return -EINVAL;
440 }
441
442 mutex_lock(&data->update_lock);
443
444 reg = i2c_smbus_read_byte_data(to_i2c_client(dev),
445 FSCHMD_REG_FAN_RIPPLE[data->kind][index]);
446
447 /* bits 2..7 reserved => mask with 0x03 */
448 reg &= ~0x03;
449 reg |= v;
450
451 i2c_smbus_write_byte_data(to_i2c_client(dev),
452 FSCHMD_REG_FAN_RIPPLE[data->kind][index], reg);
453
454 data->fan_ripple[index] = reg;
455
456 mutex_unlock(&data->update_lock);
457
458 return count;
459 }
460
461 static ssize_t show_fan_alarm(struct device *dev,
462 struct device_attribute *devattr, char *buf)
463 {
464 int index = to_sensor_dev_attr(devattr)->index;
465 struct fschmd_data *data = fschmd_update_device(dev);
466
467 if (data->fan_status[index] & FSCHMD_FAN_ALARM)
468 return sprintf(buf, "1\n");
469 else
470 return sprintf(buf, "0\n");
471 }
472
473 static ssize_t show_fan_fault(struct device *dev,
474 struct device_attribute *devattr, char *buf)
475 {
476 int index = to_sensor_dev_attr(devattr)->index;
477 struct fschmd_data *data = fschmd_update_device(dev);
478
479 if (data->fan_status[index] & FSCHMD_FAN_NOT_PRESENT)
480 return sprintf(buf, "1\n");
481 else
482 return sprintf(buf, "0\n");
483 }
484
485
486 static ssize_t show_pwm_auto_point1_pwm(struct device *dev,
487 struct device_attribute *devattr, char *buf)
488 {
489 int index = to_sensor_dev_attr(devattr)->index;
490 struct fschmd_data *data = fschmd_update_device(dev);
491 int val = data->fan_min[index];
492
493 /* 0 = allow turning off (except on the syl), 1-255 = 50-100% */
494 if (val || data->kind == fscsyl - 1)
495 val = val / 2 + 128;
496
497 return sprintf(buf, "%d\n", val);
498 }
499
500 static ssize_t store_pwm_auto_point1_pwm(struct device *dev,
501 struct device_attribute *devattr, const char *buf, size_t count)
502 {
503 int index = to_sensor_dev_attr(devattr)->index;
504 struct fschmd_data *data = dev_get_drvdata(dev);
505 unsigned long v = simple_strtoul(buf, NULL, 10);
506
507 /* reg: 0 = allow turning off (except on the syl), 1-255 = 50-100% */
508 if (v || data->kind == fscsyl - 1) {
509 v = SENSORS_LIMIT(v, 128, 255);
510 v = (v - 128) * 2 + 1;
511 }
512
513 mutex_lock(&data->update_lock);
514
515 i2c_smbus_write_byte_data(to_i2c_client(dev),
516 FSCHMD_REG_FAN_MIN[data->kind][index], v);
517 data->fan_min[index] = v;
518
519 mutex_unlock(&data->update_lock);
520
521 return count;
522 }
523
524
525 /* The FSC hwmon family has the ability to force an attached alert led to flash
526 from software, we export this as an alert_led sysfs attr */
527 static ssize_t show_alert_led(struct device *dev,
528 struct device_attribute *devattr, char *buf)
529 {
530 struct fschmd_data *data = fschmd_update_device(dev);
531
532 if (data->global_control & FSCHMD_CONTROL_ALERT_LED)
533 return sprintf(buf, "1\n");
534 else
535 return sprintf(buf, "0\n");
536 }
537
538 static ssize_t store_alert_led(struct device *dev,
539 struct device_attribute *devattr, const char *buf, size_t count)
540 {
541 u8 reg;
542 struct fschmd_data *data = dev_get_drvdata(dev);
543 unsigned long v = simple_strtoul(buf, NULL, 10);
544
545 mutex_lock(&data->update_lock);
546
547 reg = i2c_smbus_read_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL);
548
549 if (v)
550 reg |= FSCHMD_CONTROL_ALERT_LED;
551 else
552 reg &= ~FSCHMD_CONTROL_ALERT_LED;
553
554 i2c_smbus_write_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL, reg);
555
556 data->global_control = reg;
557
558 mutex_unlock(&data->update_lock);
559
560 return count;
561 }
562
563 static DEVICE_ATTR(alert_led, 0644, show_alert_led, store_alert_led);
564
565 static struct sensor_device_attribute fschmd_attr[] = {
566 SENSOR_ATTR(in0_input, 0444, show_in_value, NULL, 0),
567 SENSOR_ATTR(in1_input, 0444, show_in_value, NULL, 1),
568 SENSOR_ATTR(in2_input, 0444, show_in_value, NULL, 2),
569 SENSOR_ATTR(in3_input, 0444, show_in_value, NULL, 3),
570 SENSOR_ATTR(in4_input, 0444, show_in_value, NULL, 4),
571 SENSOR_ATTR(in5_input, 0444, show_in_value, NULL, 5),
572 };
573
574 static struct sensor_device_attribute fschmd_temp_attr[] = {
575 SENSOR_ATTR(temp1_input, 0444, show_temp_value, NULL, 0),
576 SENSOR_ATTR(temp1_max, 0644, show_temp_max, store_temp_max, 0),
577 SENSOR_ATTR(temp1_fault, 0444, show_temp_fault, NULL, 0),
578 SENSOR_ATTR(temp1_alarm, 0444, show_temp_alarm, NULL, 0),
579 SENSOR_ATTR(temp2_input, 0444, show_temp_value, NULL, 1),
580 SENSOR_ATTR(temp2_max, 0644, show_temp_max, store_temp_max, 1),
581 SENSOR_ATTR(temp2_fault, 0444, show_temp_fault, NULL, 1),
582 SENSOR_ATTR(temp2_alarm, 0444, show_temp_alarm, NULL, 1),
583 SENSOR_ATTR(temp3_input, 0444, show_temp_value, NULL, 2),
584 SENSOR_ATTR(temp3_max, 0644, show_temp_max, store_temp_max, 2),
585 SENSOR_ATTR(temp3_fault, 0444, show_temp_fault, NULL, 2),
586 SENSOR_ATTR(temp3_alarm, 0444, show_temp_alarm, NULL, 2),
587 SENSOR_ATTR(temp4_input, 0444, show_temp_value, NULL, 3),
588 SENSOR_ATTR(temp4_max, 0644, show_temp_max, store_temp_max, 3),
589 SENSOR_ATTR(temp4_fault, 0444, show_temp_fault, NULL, 3),
590 SENSOR_ATTR(temp4_alarm, 0444, show_temp_alarm, NULL, 3),
591 SENSOR_ATTR(temp5_input, 0444, show_temp_value, NULL, 4),
592 SENSOR_ATTR(temp5_max, 0644, show_temp_max, store_temp_max, 4),
593 SENSOR_ATTR(temp5_fault, 0444, show_temp_fault, NULL, 4),
594 SENSOR_ATTR(temp5_alarm, 0444, show_temp_alarm, NULL, 4),
595 SENSOR_ATTR(temp6_input, 0444, show_temp_value, NULL, 5),
596 SENSOR_ATTR(temp6_max, 0644, show_temp_max, store_temp_max, 5),
597 SENSOR_ATTR(temp6_fault, 0444, show_temp_fault, NULL, 5),
598 SENSOR_ATTR(temp6_alarm, 0444, show_temp_alarm, NULL, 5),
599 SENSOR_ATTR(temp7_input, 0444, show_temp_value, NULL, 6),
600 SENSOR_ATTR(temp7_max, 0644, show_temp_max, store_temp_max, 6),
601 SENSOR_ATTR(temp7_fault, 0444, show_temp_fault, NULL, 6),
602 SENSOR_ATTR(temp7_alarm, 0444, show_temp_alarm, NULL, 6),
603 SENSOR_ATTR(temp8_input, 0444, show_temp_value, NULL, 7),
604 SENSOR_ATTR(temp8_max, 0644, show_temp_max, store_temp_max, 7),
605 SENSOR_ATTR(temp8_fault, 0444, show_temp_fault, NULL, 7),
606 SENSOR_ATTR(temp8_alarm, 0444, show_temp_alarm, NULL, 7),
607 SENSOR_ATTR(temp9_input, 0444, show_temp_value, NULL, 8),
608 SENSOR_ATTR(temp9_max, 0644, show_temp_max, store_temp_max, 8),
609 SENSOR_ATTR(temp9_fault, 0444, show_temp_fault, NULL, 8),
610 SENSOR_ATTR(temp9_alarm, 0444, show_temp_alarm, NULL, 8),
611 SENSOR_ATTR(temp10_input, 0444, show_temp_value, NULL, 9),
612 SENSOR_ATTR(temp10_max, 0644, show_temp_max, store_temp_max, 9),
613 SENSOR_ATTR(temp10_fault, 0444, show_temp_fault, NULL, 9),
614 SENSOR_ATTR(temp10_alarm, 0444, show_temp_alarm, NULL, 9),
615 SENSOR_ATTR(temp11_input, 0444, show_temp_value, NULL, 10),
616 SENSOR_ATTR(temp11_max, 0644, show_temp_max, store_temp_max, 10),
617 SENSOR_ATTR(temp11_fault, 0444, show_temp_fault, NULL, 10),
618 SENSOR_ATTR(temp11_alarm, 0444, show_temp_alarm, NULL, 10),
619 };
620
621 static struct sensor_device_attribute fschmd_fan_attr[] = {
622 SENSOR_ATTR(fan1_input, 0444, show_fan_value, NULL, 0),
623 SENSOR_ATTR(fan1_div, 0644, show_fan_div, store_fan_div, 0),
624 SENSOR_ATTR(fan1_alarm, 0444, show_fan_alarm, NULL, 0),
625 SENSOR_ATTR(fan1_fault, 0444, show_fan_fault, NULL, 0),
626 SENSOR_ATTR(pwm1_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
627 store_pwm_auto_point1_pwm, 0),
628 SENSOR_ATTR(fan2_input, 0444, show_fan_value, NULL, 1),
629 SENSOR_ATTR(fan2_div, 0644, show_fan_div, store_fan_div, 1),
630 SENSOR_ATTR(fan2_alarm, 0444, show_fan_alarm, NULL, 1),
631 SENSOR_ATTR(fan2_fault, 0444, show_fan_fault, NULL, 1),
632 SENSOR_ATTR(pwm2_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
633 store_pwm_auto_point1_pwm, 1),
634 SENSOR_ATTR(fan3_input, 0444, show_fan_value, NULL, 2),
635 SENSOR_ATTR(fan3_div, 0644, show_fan_div, store_fan_div, 2),
636 SENSOR_ATTR(fan3_alarm, 0444, show_fan_alarm, NULL, 2),
637 SENSOR_ATTR(fan3_fault, 0444, show_fan_fault, NULL, 2),
638 SENSOR_ATTR(pwm3_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
639 store_pwm_auto_point1_pwm, 2),
640 SENSOR_ATTR(fan4_input, 0444, show_fan_value, NULL, 3),
641 SENSOR_ATTR(fan4_div, 0644, show_fan_div, store_fan_div, 3),
642 SENSOR_ATTR(fan4_alarm, 0444, show_fan_alarm, NULL, 3),
643 SENSOR_ATTR(fan4_fault, 0444, show_fan_fault, NULL, 3),
644 SENSOR_ATTR(pwm4_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
645 store_pwm_auto_point1_pwm, 3),
646 SENSOR_ATTR(fan5_input, 0444, show_fan_value, NULL, 4),
647 SENSOR_ATTR(fan5_div, 0644, show_fan_div, store_fan_div, 4),
648 SENSOR_ATTR(fan5_alarm, 0444, show_fan_alarm, NULL, 4),
649 SENSOR_ATTR(fan5_fault, 0444, show_fan_fault, NULL, 4),
650 SENSOR_ATTR(pwm5_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
651 store_pwm_auto_point1_pwm, 4),
652 SENSOR_ATTR(fan6_input, 0444, show_fan_value, NULL, 5),
653 SENSOR_ATTR(fan6_div, 0644, show_fan_div, store_fan_div, 5),
654 SENSOR_ATTR(fan6_alarm, 0444, show_fan_alarm, NULL, 5),
655 SENSOR_ATTR(fan6_fault, 0444, show_fan_fault, NULL, 5),
656 SENSOR_ATTR(pwm6_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
657 store_pwm_auto_point1_pwm, 5),
658 SENSOR_ATTR(fan7_input, 0444, show_fan_value, NULL, 6),
659 SENSOR_ATTR(fan7_div, 0644, show_fan_div, store_fan_div, 6),
660 SENSOR_ATTR(fan7_alarm, 0444, show_fan_alarm, NULL, 6),
661 SENSOR_ATTR(fan7_fault, 0444, show_fan_fault, NULL, 6),
662 SENSOR_ATTR(pwm7_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
663 store_pwm_auto_point1_pwm, 6),
664 };
665
666
667 /*
668 * Watchdog routines
669 */
670
671 static int watchdog_set_timeout(struct fschmd_data *data, int timeout)
672 {
673 int ret, resolution;
674 int kind = data->kind + 1; /* 0-x array index -> 1-x module param */
675
676 /* 2 second or 60 second resolution? */
677 if (timeout <= 510 || kind == fscpos || kind == fscscy)
678 resolution = 2;
679 else
680 resolution = 60;
681
682 if (timeout < resolution || timeout > (resolution * 255))
683 return -EINVAL;
684
685 mutex_lock(&data->watchdog_lock);
686 if (!data->client) {
687 ret = -ENODEV;
688 goto leave;
689 }
690
691 if (resolution == 2)
692 data->watchdog_control &= ~FSCHMD_WDOG_CONTROL_RESOLUTION;
693 else
694 data->watchdog_control |= FSCHMD_WDOG_CONTROL_RESOLUTION;
695
696 data->watchdog_preset = DIV_ROUND_UP(timeout, resolution);
697
698 /* Write new timeout value */
699 i2c_smbus_write_byte_data(data->client,
700 FSCHMD_REG_WDOG_PRESET[data->kind], data->watchdog_preset);
701 /* Write new control register, do not trigger! */
702 i2c_smbus_write_byte_data(data->client,
703 FSCHMD_REG_WDOG_CONTROL[data->kind],
704 data->watchdog_control & ~FSCHMD_WDOG_CONTROL_TRIGGER);
705
706 ret = data->watchdog_preset * resolution;
707
708 leave:
709 mutex_unlock(&data->watchdog_lock);
710 return ret;
711 }
712
713 static int watchdog_get_timeout(struct fschmd_data *data)
714 {
715 int timeout;
716
717 mutex_lock(&data->watchdog_lock);
718 if (data->watchdog_control & FSCHMD_WDOG_CONTROL_RESOLUTION)
719 timeout = data->watchdog_preset * 60;
720 else
721 timeout = data->watchdog_preset * 2;
722 mutex_unlock(&data->watchdog_lock);
723
724 return timeout;
725 }
726
727 static int watchdog_trigger(struct fschmd_data *data)
728 {
729 int ret = 0;
730
731 mutex_lock(&data->watchdog_lock);
732 if (!data->client) {
733 ret = -ENODEV;
734 goto leave;
735 }
736
737 data->watchdog_control |= FSCHMD_WDOG_CONTROL_TRIGGER;
738 i2c_smbus_write_byte_data(data->client,
739 FSCHMD_REG_WDOG_CONTROL[data->kind],
740 data->watchdog_control);
741 leave:
742 mutex_unlock(&data->watchdog_lock);
743 return ret;
744 }
745
746 static int watchdog_stop(struct fschmd_data *data)
747 {
748 int ret = 0;
749
750 mutex_lock(&data->watchdog_lock);
751 if (!data->client) {
752 ret = -ENODEV;
753 goto leave;
754 }
755
756 data->watchdog_control &= ~FSCHMD_WDOG_CONTROL_STARTED;
757 /* Don't store the stop flag in our watchdog control register copy, as
758 its a write only bit (read always returns 0) */
759 i2c_smbus_write_byte_data(data->client,
760 FSCHMD_REG_WDOG_CONTROL[data->kind],
761 data->watchdog_control | FSCHMD_WDOG_CONTROL_STOP);
762 leave:
763 mutex_unlock(&data->watchdog_lock);
764 return ret;
765 }
766
767 static int watchdog_open(struct inode *inode, struct file *filp)
768 {
769 struct fschmd_data *pos, *data = NULL;
770
771 /* We get called from drivers/char/misc.c with misc_mtx hold, and we
772 call misc_register() from fschmd_probe() with watchdog_data_mutex
773 hold, as misc_register() takes the misc_mtx lock, this is a possible
774 deadlock, so we use mutex_trylock here. */
775 if (!mutex_trylock(&watchdog_data_mutex))
776 return -ERESTARTSYS;
777 list_for_each_entry(pos, &watchdog_data_list, list) {
778 if (pos->watchdog_miscdev.minor == iminor(inode)) {
779 data = pos;
780 break;
781 }
782 }
783 /* Note we can never not have found data, so we don't check for this */
784 kref_get(&data->kref);
785 mutex_unlock(&watchdog_data_mutex);
786
787 if (test_and_set_bit(0, &data->watchdog_is_open))
788 return -EBUSY;
789
790 /* Start the watchdog */
791 watchdog_trigger(data);
792 filp->private_data = data;
793
794 return nonseekable_open(inode, filp);
795 }
796
797 static int watchdog_release(struct inode *inode, struct file *filp)
798 {
799 struct fschmd_data *data = filp->private_data;
800
801 if (data->watchdog_expect_close) {
802 watchdog_stop(data);
803 data->watchdog_expect_close = 0;
804 } else {
805 watchdog_trigger(data);
806 dev_crit(&data->client->dev,
807 "unexpected close, not stopping watchdog!\n");
808 }
809
810 clear_bit(0, &data->watchdog_is_open);
811
812 mutex_lock(&watchdog_data_mutex);
813 kref_put(&data->kref, fschmd_release_resources);
814 mutex_unlock(&watchdog_data_mutex);
815
816 return 0;
817 }
818
819 static ssize_t watchdog_write(struct file *filp, const char __user *buf,
820 size_t count, loff_t *offset)
821 {
822 int ret;
823 struct fschmd_data *data = filp->private_data;
824
825 if (count) {
826 if (!nowayout) {
827 size_t i;
828
829 /* Clear it in case it was set with a previous write */
830 data->watchdog_expect_close = 0;
831
832 for (i = 0; i != count; i++) {
833 char c;
834 if (get_user(c, buf + i))
835 return -EFAULT;
836 if (c == 'V')
837 data->watchdog_expect_close = 1;
838 }
839 }
840 ret = watchdog_trigger(data);
841 if (ret < 0)
842 return ret;
843 }
844 return count;
845 }
846
847 static int watchdog_ioctl(struct inode *inode, struct file *filp,
848 unsigned int cmd, unsigned long arg)
849 {
850 static struct watchdog_info ident = {
851 .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
852 WDIOF_CARDRESET,
853 .identity = "FSC watchdog"
854 };
855 int i, ret = 0;
856 struct fschmd_data *data = filp->private_data;
857
858 switch (cmd) {
859 case WDIOC_GETSUPPORT:
860 ident.firmware_version = data->revision;
861 if (!nowayout)
862 ident.options |= WDIOF_MAGICCLOSE;
863 if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
864 ret = -EFAULT;
865 break;
866
867 case WDIOC_GETSTATUS:
868 ret = put_user(0, (int __user *)arg);
869 break;
870
871 case WDIOC_GETBOOTSTATUS:
872 if (data->watchdog_state & FSCHMD_WDOG_STATE_CARDRESET)
873 ret = put_user(WDIOF_CARDRESET, (int __user *)arg);
874 else
875 ret = put_user(0, (int __user *)arg);
876 break;
877
878 case WDIOC_KEEPALIVE:
879 ret = watchdog_trigger(data);
880 break;
881
882 case WDIOC_GETTIMEOUT:
883 i = watchdog_get_timeout(data);
884 ret = put_user(i, (int __user *)arg);
885 break;
886
887 case WDIOC_SETTIMEOUT:
888 if (get_user(i, (int __user *)arg)) {
889 ret = -EFAULT;
890 break;
891 }
892 ret = watchdog_set_timeout(data, i);
893 if (ret > 0)
894 ret = put_user(ret, (int __user *)arg);
895 break;
896
897 case WDIOC_SETOPTIONS:
898 if (get_user(i, (int __user *)arg)) {
899 ret = -EFAULT;
900 break;
901 }
902
903 if (i & WDIOS_DISABLECARD)
904 ret = watchdog_stop(data);
905 else if (i & WDIOS_ENABLECARD)
906 ret = watchdog_trigger(data);
907 else
908 ret = -EINVAL;
909
910 break;
911 default:
912 ret = -ENOTTY;
913 }
914
915 return ret;
916 }
917
918 static const struct file_operations watchdog_fops = {
919 .owner = THIS_MODULE,
920 .llseek = no_llseek,
921 .open = watchdog_open,
922 .release = watchdog_release,
923 .write = watchdog_write,
924 .ioctl = watchdog_ioctl,
925 };
926
927
928 /*
929 * Detect, register, unregister and update device functions
930 */
931
932 /* DMI decode routine to read voltage scaling factors from special DMI tables,
933 which are available on FSC machines with an fscher or later chip. */
934 static void fschmd_dmi_decode(const struct dmi_header *header, void *dummy)
935 {
936 int i, mult[3] = { 0 }, offset[3] = { 0 }, vref = 0, found = 0;
937
938 /* dmi code ugliness, we get passed the address of the contents of
939 a complete DMI record, but in the form of a dmi_header pointer, in
940 reality this address holds header->length bytes of which the header
941 are the first 4 bytes */
942 u8 *dmi_data = (u8 *)header;
943
944 /* We are looking for OEM-specific type 185 */
945 if (header->type != 185)
946 return;
947
948 /* we are looking for what Siemens calls "subtype" 19, the subtype
949 is stored in byte 5 of the dmi block */
950 if (header->length < 5 || dmi_data[4] != 19)
951 return;
952
953 /* After the subtype comes 1 unknown byte and then blocks of 5 bytes,
954 consisting of what Siemens calls an "Entity" number, followed by
955 2 16-bit words in LSB first order */
956 for (i = 6; (i + 4) < header->length; i += 5) {
957 /* entity 1 - 3: voltage multiplier and offset */
958 if (dmi_data[i] >= 1 && dmi_data[i] <= 3) {
959 /* Our in sensors order and the DMI order differ */
960 const int shuffle[3] = { 1, 0, 2 };
961 int in = shuffle[dmi_data[i] - 1];
962
963 /* Check for twice the same entity */
964 if (found & (1 << in))
965 return;
966
967 mult[in] = dmi_data[i + 1] | (dmi_data[i + 2] << 8);
968 offset[in] = dmi_data[i + 3] | (dmi_data[i + 4] << 8);
969
970 found |= 1 << in;
971 }
972
973 /* entity 7: reference voltage */
974 if (dmi_data[i] == 7) {
975 /* Check for twice the same entity */
976 if (found & 0x08)
977 return;
978
979 vref = dmi_data[i + 1] | (dmi_data[i + 2] << 8);
980
981 found |= 0x08;
982 }
983 }
984
985 if (found == 0x0F) {
986 for (i = 0; i < 3; i++) {
987 dmi_mult[i] = mult[i] * 10;
988 dmi_offset[i] = offset[i] * 10;
989 }
990 /* According to the docs there should be separate dmi entries
991 for the mult's and offsets of in3-5 of the syl, but on
992 my test machine these are not present */
993 dmi_mult[3] = dmi_mult[2];
994 dmi_mult[4] = dmi_mult[1];
995 dmi_mult[5] = dmi_mult[2];
996 dmi_offset[3] = dmi_offset[2];
997 dmi_offset[4] = dmi_offset[1];
998 dmi_offset[5] = dmi_offset[2];
999 dmi_vref = vref;
1000 }
1001 }
1002
1003 static int fschmd_detect(struct i2c_client *client, int _kind,
1004 struct i2c_board_info *info)
1005 {
1006 enum chips kind;
1007 struct i2c_adapter *adapter = client->adapter;
1008 char id[4];
1009
1010 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1011 return -ENODEV;
1012
1013 /* Detect & Identify the chip */
1014 id[0] = i2c_smbus_read_byte_data(client, FSCHMD_REG_IDENT_0);
1015 id[1] = i2c_smbus_read_byte_data(client, FSCHMD_REG_IDENT_1);
1016 id[2] = i2c_smbus_read_byte_data(client, FSCHMD_REG_IDENT_2);
1017 id[3] = '\0';
1018
1019 if (!strcmp(id, "PEG"))
1020 kind = fscpos;
1021 else if (!strcmp(id, "HER"))
1022 kind = fscher;
1023 else if (!strcmp(id, "SCY"))
1024 kind = fscscy;
1025 else if (!strcmp(id, "HRC"))
1026 kind = fschrc;
1027 else if (!strcmp(id, "HMD"))
1028 kind = fschmd;
1029 else if (!strcmp(id, "HDS"))
1030 kind = fschds;
1031 else if (!strcmp(id, "SYL"))
1032 kind = fscsyl;
1033 else
1034 return -ENODEV;
1035
1036 strlcpy(info->type, fschmd_id[kind - 1].name, I2C_NAME_SIZE);
1037
1038 return 0;
1039 }
1040
1041 static int fschmd_probe(struct i2c_client *client,
1042 const struct i2c_device_id *id)
1043 {
1044 struct fschmd_data *data;
1045 const char * const names[7] = { "Poseidon", "Hermes", "Scylla",
1046 "Heracles", "Heimdall", "Hades", "Syleus" };
1047 const int watchdog_minors[] = { WATCHDOG_MINOR, 212, 213, 214, 215 };
1048 int i, err;
1049 enum chips kind = id->driver_data;
1050
1051 data = kzalloc(sizeof(struct fschmd_data), GFP_KERNEL);
1052 if (!data)
1053 return -ENOMEM;
1054
1055 i2c_set_clientdata(client, data);
1056 mutex_init(&data->update_lock);
1057 mutex_init(&data->watchdog_lock);
1058 INIT_LIST_HEAD(&data->list);
1059 kref_init(&data->kref);
1060 /* Store client pointer in our data struct for watchdog usage
1061 (where the client is found through a data ptr instead of the
1062 otherway around) */
1063 data->client = client;
1064
1065 if (kind == fscpos) {
1066 /* The Poseidon has hardwired temp limits, fill these
1067 in for the alarm resetting code */
1068 data->temp_max[0] = 70 + 128;
1069 data->temp_max[1] = 50 + 128;
1070 data->temp_max[2] = 50 + 128;
1071 }
1072
1073 /* Read the special DMI table for fscher and newer chips */
1074 if ((kind == fscher || kind >= fschrc) && dmi_vref == -1) {
1075 dmi_walk(fschmd_dmi_decode, NULL);
1076 if (dmi_vref == -1) {
1077 dev_warn(&client->dev,
1078 "Couldn't get voltage scaling factors from "
1079 "BIOS DMI table, using builtin defaults\n");
1080 dmi_vref = 33;
1081 }
1082 }
1083
1084 /* i2c kind goes from 1-6, we want from 0-5 to address arrays */
1085 data->kind = kind - 1;
1086
1087 /* Read in some never changing registers */
1088 data->revision = i2c_smbus_read_byte_data(client, FSCHMD_REG_REVISION);
1089 data->global_control = i2c_smbus_read_byte_data(client,
1090 FSCHMD_REG_CONTROL);
1091 data->watchdog_control = i2c_smbus_read_byte_data(client,
1092 FSCHMD_REG_WDOG_CONTROL[data->kind]);
1093 data->watchdog_state = i2c_smbus_read_byte_data(client,
1094 FSCHMD_REG_WDOG_STATE[data->kind]);
1095 data->watchdog_preset = i2c_smbus_read_byte_data(client,
1096 FSCHMD_REG_WDOG_PRESET[data->kind]);
1097
1098 err = device_create_file(&client->dev, &dev_attr_alert_led);
1099 if (err)
1100 goto exit_detach;
1101
1102 for (i = 0; i < FSCHMD_NO_VOLT_SENSORS[data->kind]; i++) {
1103 err = device_create_file(&client->dev,
1104 &fschmd_attr[i].dev_attr);
1105 if (err)
1106 goto exit_detach;
1107 }
1108
1109 for (i = 0; i < (FSCHMD_NO_TEMP_SENSORS[data->kind] * 4); i++) {
1110 /* Poseidon doesn't have TEMP_LIMIT registers */
1111 if (kind == fscpos && fschmd_temp_attr[i].dev_attr.show ==
1112 show_temp_max)
1113 continue;
1114
1115 if (kind == fscsyl) {
1116 if (i % 4 == 0)
1117 data->temp_status[i / 4] =
1118 i2c_smbus_read_byte_data(client,
1119 FSCHMD_REG_TEMP_STATE
1120 [data->kind][i / 4]);
1121 if (data->temp_status[i / 4] & FSCHMD_TEMP_DISABLED)
1122 continue;
1123 }
1124
1125 err = device_create_file(&client->dev,
1126 &fschmd_temp_attr[i].dev_attr);
1127 if (err)
1128 goto exit_detach;
1129 }
1130
1131 for (i = 0; i < (FSCHMD_NO_FAN_SENSORS[data->kind] * 5); i++) {
1132 /* Poseidon doesn't have a FAN_MIN register for its 3rd fan */
1133 if (kind == fscpos &&
1134 !strcmp(fschmd_fan_attr[i].dev_attr.attr.name,
1135 "pwm3_auto_point1_pwm"))
1136 continue;
1137
1138 if (kind == fscsyl) {
1139 if (i % 5 == 0)
1140 data->fan_status[i / 5] =
1141 i2c_smbus_read_byte_data(client,
1142 FSCHMD_REG_FAN_STATE
1143 [data->kind][i / 5]);
1144 if (data->fan_status[i / 5] & FSCHMD_FAN_DISABLED)
1145 continue;
1146 }
1147
1148 err = device_create_file(&client->dev,
1149 &fschmd_fan_attr[i].dev_attr);
1150 if (err)
1151 goto exit_detach;
1152 }
1153
1154 data->hwmon_dev = hwmon_device_register(&client->dev);
1155 if (IS_ERR(data->hwmon_dev)) {
1156 err = PTR_ERR(data->hwmon_dev);
1157 data->hwmon_dev = NULL;
1158 goto exit_detach;
1159 }
1160
1161 /* We take the data_mutex lock early so that watchdog_open() cannot
1162 run when misc_register() has completed, but we've not yet added
1163 our data to the watchdog_data_list (and set the default timeout) */
1164 mutex_lock(&watchdog_data_mutex);
1165 for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
1166 /* Register our watchdog part */
1167 snprintf(data->watchdog_name, sizeof(data->watchdog_name),
1168 "watchdog%c", (i == 0) ? '\0' : ('0' + i));
1169 data->watchdog_miscdev.name = data->watchdog_name;
1170 data->watchdog_miscdev.fops = &watchdog_fops;
1171 data->watchdog_miscdev.minor = watchdog_minors[i];
1172 err = misc_register(&data->watchdog_miscdev);
1173 if (err == -EBUSY)
1174 continue;
1175 if (err) {
1176 data->watchdog_miscdev.minor = 0;
1177 dev_err(&client->dev,
1178 "Registering watchdog chardev: %d\n", err);
1179 break;
1180 }
1181
1182 list_add(&data->list, &watchdog_data_list);
1183 watchdog_set_timeout(data, 60);
1184 dev_info(&client->dev,
1185 "Registered watchdog chardev major 10, minor: %d\n",
1186 watchdog_minors[i]);
1187 break;
1188 }
1189 if (i == ARRAY_SIZE(watchdog_minors)) {
1190 data->watchdog_miscdev.minor = 0;
1191 dev_warn(&client->dev, "Couldn't register watchdog chardev "
1192 "(due to no free minor)\n");
1193 }
1194 mutex_unlock(&watchdog_data_mutex);
1195
1196 dev_info(&client->dev, "Detected FSC %s chip, revision: %d\n",
1197 names[data->kind], (int) data->revision);
1198
1199 return 0;
1200
1201 exit_detach:
1202 fschmd_remove(client); /* will also free data for us */
1203 return err;
1204 }
1205
1206 static int fschmd_remove(struct i2c_client *client)
1207 {
1208 struct fschmd_data *data = i2c_get_clientdata(client);
1209 int i;
1210
1211 /* Unregister the watchdog (if registered) */
1212 if (data->watchdog_miscdev.minor) {
1213 misc_deregister(&data->watchdog_miscdev);
1214 if (data->watchdog_is_open) {
1215 dev_warn(&client->dev,
1216 "i2c client detached with watchdog open! "
1217 "Stopping watchdog.\n");
1218 watchdog_stop(data);
1219 }
1220 mutex_lock(&watchdog_data_mutex);
1221 list_del(&data->list);
1222 mutex_unlock(&watchdog_data_mutex);
1223 /* Tell the watchdog code the client is gone */
1224 mutex_lock(&data->watchdog_lock);
1225 data->client = NULL;
1226 mutex_unlock(&data->watchdog_lock);
1227 }
1228
1229 /* Check if registered in case we're called from fschmd_detect
1230 to cleanup after an error */
1231 if (data->hwmon_dev)
1232 hwmon_device_unregister(data->hwmon_dev);
1233
1234 device_remove_file(&client->dev, &dev_attr_alert_led);
1235 for (i = 0; i < (FSCHMD_NO_VOLT_SENSORS[data->kind]); i++)
1236 device_remove_file(&client->dev, &fschmd_attr[i].dev_attr);
1237 for (i = 0; i < (FSCHMD_NO_TEMP_SENSORS[data->kind] * 4); i++)
1238 device_remove_file(&client->dev,
1239 &fschmd_temp_attr[i].dev_attr);
1240 for (i = 0; i < (FSCHMD_NO_FAN_SENSORS[data->kind] * 5); i++)
1241 device_remove_file(&client->dev,
1242 &fschmd_fan_attr[i].dev_attr);
1243
1244 mutex_lock(&watchdog_data_mutex);
1245 kref_put(&data->kref, fschmd_release_resources);
1246 mutex_unlock(&watchdog_data_mutex);
1247
1248 return 0;
1249 }
1250
1251 static struct fschmd_data *fschmd_update_device(struct device *dev)
1252 {
1253 struct i2c_client *client = to_i2c_client(dev);
1254 struct fschmd_data *data = i2c_get_clientdata(client);
1255 int i;
1256
1257 mutex_lock(&data->update_lock);
1258
1259 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
1260
1261 for (i = 0; i < FSCHMD_NO_TEMP_SENSORS[data->kind]; i++) {
1262 data->temp_act[i] = i2c_smbus_read_byte_data(client,
1263 FSCHMD_REG_TEMP_ACT[data->kind][i]);
1264 data->temp_status[i] = i2c_smbus_read_byte_data(client,
1265 FSCHMD_REG_TEMP_STATE[data->kind][i]);
1266
1267 /* The fscpos doesn't have TEMP_LIMIT registers */
1268 if (FSCHMD_REG_TEMP_LIMIT[data->kind][i])
1269 data->temp_max[i] = i2c_smbus_read_byte_data(
1270 client,
1271 FSCHMD_REG_TEMP_LIMIT[data->kind][i]);
1272
1273 /* reset alarm if the alarm condition is gone,
1274 the chip doesn't do this itself */
1275 if ((data->temp_status[i] & FSCHMD_TEMP_ALARM_MASK) ==
1276 FSCHMD_TEMP_ALARM_MASK &&
1277 data->temp_act[i] < data->temp_max[i])
1278 i2c_smbus_write_byte_data(client,
1279 FSCHMD_REG_TEMP_STATE[data->kind][i],
1280 data->temp_status[i]);
1281 }
1282
1283 for (i = 0; i < FSCHMD_NO_FAN_SENSORS[data->kind]; i++) {
1284 data->fan_act[i] = i2c_smbus_read_byte_data(client,
1285 FSCHMD_REG_FAN_ACT[data->kind][i]);
1286 data->fan_status[i] = i2c_smbus_read_byte_data(client,
1287 FSCHMD_REG_FAN_STATE[data->kind][i]);
1288 data->fan_ripple[i] = i2c_smbus_read_byte_data(client,
1289 FSCHMD_REG_FAN_RIPPLE[data->kind][i]);
1290
1291 /* The fscpos third fan doesn't have a fan_min */
1292 if (FSCHMD_REG_FAN_MIN[data->kind][i])
1293 data->fan_min[i] = i2c_smbus_read_byte_data(
1294 client,
1295 FSCHMD_REG_FAN_MIN[data->kind][i]);
1296
1297 /* reset fan status if speed is back to > 0 */
1298 if ((data->fan_status[i] & FSCHMD_FAN_ALARM) &&
1299 data->fan_act[i])
1300 i2c_smbus_write_byte_data(client,
1301 FSCHMD_REG_FAN_STATE[data->kind][i],
1302 data->fan_status[i]);
1303 }
1304
1305 for (i = 0; i < FSCHMD_NO_VOLT_SENSORS[data->kind]; i++)
1306 data->volt[i] = i2c_smbus_read_byte_data(client,
1307 FSCHMD_REG_VOLT[data->kind][i]);
1308
1309 data->last_updated = jiffies;
1310 data->valid = 1;
1311 }
1312
1313 mutex_unlock(&data->update_lock);
1314
1315 return data;
1316 }
1317
1318 static int __init fschmd_init(void)
1319 {
1320 return i2c_add_driver(&fschmd_driver);
1321 }
1322
1323 static void __exit fschmd_exit(void)
1324 {
1325 i2c_del_driver(&fschmd_driver);
1326 }
1327
1328 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
1329 MODULE_DESCRIPTION("FSC Poseidon, Hermes, Scylla, Heracles, Heimdall, Hades "
1330 "and Syleus driver");
1331 MODULE_LICENSE("GPL");
1332
1333 module_init(fschmd_init);
1334 module_exit(fschmd_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree