3 * Copyright (C) 2007 Hans de Goede <j.w.r.degoede@hhs.nl>
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.
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.
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.
21 * Merged Fujitsu Siemens hwmon driver, supporting the Poseidon, Hermes,
22 * Scylla, Heracles and Heimdall chips
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>
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>
46 /* Addresses to scan */
47 static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
49 /* Insmod parameters */
50 I2C_CLIENT_INSMOD_5(fscpos, fscher, fscscy, fschrc, fschmd);
53 * The FSCHMD registers and other defines
56 /* chip identification */
57 #define FSCHMD_REG_IDENT_0 0x00
58 #define FSCHMD_REG_IDENT_1 0x01
59 #define FSCHMD_REG_IDENT_2 0x02
60 #define FSCHMD_REG_REVISION 0x03
62 /* global control and status */
63 #define FSCHMD_REG_EVENT_STATE 0x04
64 #define FSCHMD_REG_CONTROL 0x05
66 #define FSCHMD_CONTROL_ALERT_LED_MASK 0x01
68 /* watchdog (support to be implemented) */
69 #define FSCHMD_REG_WDOG_PRESET 0x28
70 #define FSCHMD_REG_WDOG_STATE 0x23
71 #define FSCHMD_REG_WDOG_CONTROL 0x21
73 /* voltages, weird order is to keep the same order as the old drivers */
74 static const u8 FSCHMD_REG_VOLT[3] = { 0x45, 0x42, 0x48 };
76 /* minimum pwm at which the fan is driven (pwm can by increased depending on
77 the temp. Notice that for the scy some fans share there minimum speed.
78 Also notice that with the scy the sensor order is different than with the
79 other chips, this order was in the 2.4 driver and kept for consistency. */
80 static const u8 FSCHMD_REG_FAN_MIN[5][6] = {
81 { 0x55, 0x65 }, /* pos */
82 { 0x55, 0x65, 0xb5 }, /* her */
83 { 0x65, 0x65, 0x55, 0xa5, 0x55, 0xa5 }, /* scy */
84 { 0x55, 0x65, 0xa5, 0xb5 }, /* hrc */
85 { 0x55, 0x65, 0xa5, 0xb5, 0xc5 }, /* hmd */
88 /* actual fan speed */
89 static const u8 FSCHMD_REG_FAN_ACT[5][6] = {
90 { 0x0e, 0x6b, 0xab }, /* pos */
91 { 0x0e, 0x6b, 0xbb }, /* her */
92 { 0x6b, 0x6c, 0x0e, 0xab, 0x5c, 0xbb }, /* scy */
93 { 0x0e, 0x6b, 0xab, 0xbb }, /* hrc */
94 { 0x5b, 0x6b, 0xab, 0xbb, 0xcb }, /* hmd */
97 /* fan status registers */
98 static const u8 FSCHMD_REG_FAN_STATE[5][6] = {
99 { 0x0d, 0x62, 0xa2 }, /* pos */
100 { 0x0d, 0x62, 0xb2 }, /* her */
101 { 0x62, 0x61, 0x0d, 0xa2, 0x52, 0xb2 }, /* scy */
102 { 0x0d, 0x62, 0xa2, 0xb2 }, /* hrc */
103 { 0x52, 0x62, 0xa2, 0xb2, 0xc2 }, /* hmd */
106 /* fan ripple / divider registers */
107 static const u8 FSCHMD_REG_FAN_RIPPLE[5][6] = {
108 { 0x0f, 0x6f, 0xaf }, /* pos */
109 { 0x0f, 0x6f, 0xbf }, /* her */
110 { 0x6f, 0x6f, 0x0f, 0xaf, 0x0f, 0xbf }, /* scy */
111 { 0x0f, 0x6f, 0xaf, 0xbf }, /* hrc */
112 { 0x5f, 0x6f, 0xaf, 0xbf, 0xcf }, /* hmd */
115 static const int FSCHMD_NO_FAN_SENSORS[5] = { 3, 3, 6, 4, 5 };
117 /* Fan status register bitmasks */
118 #define FSCHMD_FAN_ALARM_MASK 0x04 /* called fault by FSC! */
119 #define FSCHMD_FAN_NOT_PRESENT_MASK 0x08 /* not documented */
122 /* actual temperature registers */
123 static const u8 FSCHMD_REG_TEMP_ACT[5][5] = {
124 { 0x64, 0x32, 0x35 }, /* pos */
125 { 0x64, 0x32, 0x35 }, /* her */
126 { 0x64, 0xD0, 0x32, 0x35 }, /* scy */
127 { 0x64, 0x32, 0x35 }, /* hrc */
128 { 0x70, 0x80, 0x90, 0xd0, 0xe0 }, /* hmd */
131 /* temperature state registers */
132 static const u8 FSCHMD_REG_TEMP_STATE[5][5] = {
133 { 0x71, 0x81, 0x91 }, /* pos */
134 { 0x71, 0x81, 0x91 }, /* her */
135 { 0x71, 0xd1, 0x81, 0x91 }, /* scy */
136 { 0x71, 0x81, 0x91 }, /* hrc */
137 { 0x71, 0x81, 0x91, 0xd1, 0xe1 }, /* hmd */
140 /* temperature high limit registers, FSC does not document these. Proven to be
141 there with field testing on the fscher and fschrc, already supported / used
142 in the fscscy 2.4 driver. FSC has confirmed that the fschmd has registers
143 at these addresses, but doesn't want to confirm they are the same as with
145 static const u8 FSCHMD_REG_TEMP_LIMIT[5][5] = {
146 { 0, 0, 0 }, /* pos */
147 { 0x76, 0x86, 0x96 }, /* her */
148 { 0x76, 0xd6, 0x86, 0x96 }, /* scy */
149 { 0x76, 0x86, 0x96 }, /* hrc */
150 { 0x76, 0x86, 0x96, 0xd6, 0xe6 }, /* hmd */
153 /* These were found through experimenting with an fscher, currently they are
154 not used, but we keep them around for future reference.
155 static const u8 FSCHER_REG_TEMP_AUTOP1[] = { 0x73, 0x83, 0x93 };
156 static const u8 FSCHER_REG_TEMP_AUTOP2[] = { 0x75, 0x85, 0x95 }; */
158 static const int FSCHMD_NO_TEMP_SENSORS[5] = { 3, 3, 4, 3, 5 };
160 /* temp status register bitmasks */
161 #define FSCHMD_TEMP_WORKING_MASK 0x01
162 #define FSCHMD_TEMP_ALERT_MASK 0x02
163 /* there only really is an alarm if the sensor is working and alert == 1 */
164 #define FSCHMD_TEMP_ALARM_MASK \
165 (FSCHMD_TEMP_WORKING_MASK | FSCHMD_TEMP_ALERT_MASK)
167 /* our driver name */
168 #define FSCHMD_NAME "fschmd"
171 * Functions declarations
174 static int fschmd_probe(struct i2c_client *client,
175 const struct i2c_device_id *id);
176 static int fschmd_detect(struct i2c_client *client, int kind,
177 struct i2c_board_info *info);
178 static int fschmd_remove(struct i2c_client *client);
179 static struct fschmd_data *fschmd_update_device(struct device *dev);
182 * Driver data (common to all clients)
185 static const struct i2c_device_id fschmd_id[] = {
186 { "fscpos", fscpos },
187 { "fscher", fscher },
188 { "fscscy", fscscy },
189 { "fschrc", fschrc },
190 { "fschmd", fschmd },
193 MODULE_DEVICE_TABLE(i2c, fschmd_id);
195 static struct i2c_driver fschmd_driver = {
196 .class = I2C_CLASS_HWMON,
200 .probe = fschmd_probe,
201 .remove = fschmd_remove,
202 .id_table = fschmd_id,
203 .detect = fschmd_detect,
204 .address_data = &addr_data,
208 * Client data (each client gets its own)
212 struct device *hwmon_dev;
213 struct mutex update_lock;
215 char valid; /* zero until following fields are valid */
216 unsigned long last_updated; /* in jiffies */
218 /* register values */
219 u8 global_control; /* global control register */
220 u8 volt[3]; /* 12, 5, battery voltage */
221 u8 temp_act[5]; /* temperature */
222 u8 temp_status[5]; /* status of sensor */
223 u8 temp_max[5]; /* high temp limit, notice: undocumented! */
224 u8 fan_act[6]; /* fans revolutions per second */
225 u8 fan_status[6]; /* fan status */
226 u8 fan_min[6]; /* fan min value for rps */
227 u8 fan_ripple[6]; /* divider for rps */
230 /* Global variables to hold information read from special DMI tables, which are
231 available on FSC machines with an fscher or later chip. */
232 static int dmi_mult[3] = { 490, 200, 100 };
233 static int dmi_offset[3] = { 0, 0, 0 };
234 static int dmi_vref = -1;
238 * Sysfs attr show / store functions
241 static ssize_t show_in_value(struct device *dev,
242 struct device_attribute *devattr, char *buf)
244 const int max_reading[3] = { 14200, 6600, 3300 };
245 int index = to_sensor_dev_attr(devattr)->index;
246 struct fschmd_data *data = fschmd_update_device(dev);
248 /* fscher / fschrc - 1 as data->kind is an array index, not a chips */
249 if (data->kind == (fscher - 1) || data->kind >= (fschrc - 1))
250 return sprintf(buf, "%d\n", (data->volt[index] * dmi_vref *
251 dmi_mult[index]) / 255 + dmi_offset[index]);
253 return sprintf(buf, "%d\n", (data->volt[index] *
254 max_reading[index] + 128) / 255);
258 #define TEMP_FROM_REG(val) (((val) - 128) * 1000)
260 static ssize_t show_temp_value(struct device *dev,
261 struct device_attribute *devattr, char *buf)
263 int index = to_sensor_dev_attr(devattr)->index;
264 struct fschmd_data *data = fschmd_update_device(dev);
266 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[index]));
269 static ssize_t show_temp_max(struct device *dev,
270 struct device_attribute *devattr, char *buf)
272 int index = to_sensor_dev_attr(devattr)->index;
273 struct fschmd_data *data = fschmd_update_device(dev);
275 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index]));
278 static ssize_t store_temp_max(struct device *dev, struct device_attribute
279 *devattr, const char *buf, size_t count)
281 int index = to_sensor_dev_attr(devattr)->index;
282 struct fschmd_data *data = dev_get_drvdata(dev);
283 long v = simple_strtol(buf, NULL, 10) / 1000;
285 v = SENSORS_LIMIT(v, -128, 127) + 128;
287 mutex_lock(&data->update_lock);
288 i2c_smbus_write_byte_data(to_i2c_client(dev),
289 FSCHMD_REG_TEMP_LIMIT[data->kind][index], v);
290 data->temp_max[index] = v;
291 mutex_unlock(&data->update_lock);
296 static ssize_t show_temp_fault(struct device *dev,
297 struct device_attribute *devattr, char *buf)
299 int index = to_sensor_dev_attr(devattr)->index;
300 struct fschmd_data *data = fschmd_update_device(dev);
302 /* bit 0 set means sensor working ok, so no fault! */
303 if (data->temp_status[index] & FSCHMD_TEMP_WORKING_MASK)
304 return sprintf(buf, "0\n");
306 return sprintf(buf, "1\n");
309 static ssize_t show_temp_alarm(struct device *dev,
310 struct device_attribute *devattr, char *buf)
312 int index = to_sensor_dev_attr(devattr)->index;
313 struct fschmd_data *data = fschmd_update_device(dev);
315 if ((data->temp_status[index] & FSCHMD_TEMP_ALARM_MASK) ==
316 FSCHMD_TEMP_ALARM_MASK)
317 return sprintf(buf, "1\n");
319 return sprintf(buf, "0\n");
323 #define RPM_FROM_REG(val) ((val) * 60)
325 static ssize_t show_fan_value(struct device *dev,
326 struct device_attribute *devattr, char *buf)
328 int index = to_sensor_dev_attr(devattr)->index;
329 struct fschmd_data *data = fschmd_update_device(dev);
331 return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[index]));
334 static ssize_t show_fan_div(struct device *dev,
335 struct device_attribute *devattr, char *buf)
337 int index = to_sensor_dev_attr(devattr)->index;
338 struct fschmd_data *data = fschmd_update_device(dev);
340 /* bits 2..7 reserved => mask with 3 */
341 return sprintf(buf, "%d\n", 1 << (data->fan_ripple[index] & 3));
344 static ssize_t store_fan_div(struct device *dev, struct device_attribute
345 *devattr, const char *buf, size_t count)
348 int index = to_sensor_dev_attr(devattr)->index;
349 struct fschmd_data *data = dev_get_drvdata(dev);
350 /* supported values: 2, 4, 8 */
351 unsigned long v = simple_strtoul(buf, NULL, 10);
354 case 2: v = 1; break;
355 case 4: v = 2; break;
356 case 8: v = 3; break;
358 dev_err(dev, "fan_div value %lu not supported. "
359 "Choose one of 2, 4 or 8!\n", v);
363 mutex_lock(&data->update_lock);
365 reg = i2c_smbus_read_byte_data(to_i2c_client(dev),
366 FSCHMD_REG_FAN_RIPPLE[data->kind][index]);
368 /* bits 2..7 reserved => mask with 0x03 */
372 i2c_smbus_write_byte_data(to_i2c_client(dev),
373 FSCHMD_REG_FAN_RIPPLE[data->kind][index], reg);
375 data->fan_ripple[index] = reg;
377 mutex_unlock(&data->update_lock);
382 static ssize_t show_fan_alarm(struct device *dev,
383 struct device_attribute *devattr, char *buf)
385 int index = to_sensor_dev_attr(devattr)->index;
386 struct fschmd_data *data = fschmd_update_device(dev);
388 if (data->fan_status[index] & FSCHMD_FAN_ALARM_MASK)
389 return sprintf(buf, "1\n");
391 return sprintf(buf, "0\n");
394 static ssize_t show_fan_fault(struct device *dev,
395 struct device_attribute *devattr, char *buf)
397 int index = to_sensor_dev_attr(devattr)->index;
398 struct fschmd_data *data = fschmd_update_device(dev);
400 if (data->fan_status[index] & FSCHMD_FAN_NOT_PRESENT_MASK)
401 return sprintf(buf, "1\n");
403 return sprintf(buf, "0\n");
407 static ssize_t show_pwm_auto_point1_pwm(struct device *dev,
408 struct device_attribute *devattr, char *buf)
410 int index = to_sensor_dev_attr(devattr)->index;
411 int val = fschmd_update_device(dev)->fan_min[index];
413 /* 0 = allow turning off, 1-255 = 50-100% */
417 return sprintf(buf, "%d\n", val);
420 static ssize_t store_pwm_auto_point1_pwm(struct device *dev,
421 struct device_attribute *devattr, const char *buf, size_t count)
423 int index = to_sensor_dev_attr(devattr)->index;
424 struct fschmd_data *data = dev_get_drvdata(dev);
425 unsigned long v = simple_strtoul(buf, NULL, 10);
427 /* register: 0 = allow turning off, 1-255 = 50-100% */
429 v = SENSORS_LIMIT(v, 128, 255);
430 v = (v - 128) * 2 + 1;
433 mutex_lock(&data->update_lock);
435 i2c_smbus_write_byte_data(to_i2c_client(dev),
436 FSCHMD_REG_FAN_MIN[data->kind][index], v);
437 data->fan_min[index] = v;
439 mutex_unlock(&data->update_lock);
445 /* The FSC hwmon family has the ability to force an attached alert led to flash
446 from software, we export this as an alert_led sysfs attr */
447 static ssize_t show_alert_led(struct device *dev,
448 struct device_attribute *devattr, char *buf)
450 struct fschmd_data *data = fschmd_update_device(dev);
452 if (data->global_control & FSCHMD_CONTROL_ALERT_LED_MASK)
453 return sprintf(buf, "1\n");
455 return sprintf(buf, "0\n");
458 static ssize_t store_alert_led(struct device *dev,
459 struct device_attribute *devattr, const char *buf, size_t count)
462 struct fschmd_data *data = dev_get_drvdata(dev);
463 unsigned long v = simple_strtoul(buf, NULL, 10);
465 mutex_lock(&data->update_lock);
467 reg = i2c_smbus_read_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL);
470 reg |= FSCHMD_CONTROL_ALERT_LED_MASK;
472 reg &= ~FSCHMD_CONTROL_ALERT_LED_MASK;
474 i2c_smbus_write_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL, reg);
476 data->global_control = reg;
478 mutex_unlock(&data->update_lock);
483 static struct sensor_device_attribute fschmd_attr[] = {
484 SENSOR_ATTR(in0_input, 0444, show_in_value, NULL, 0),
485 SENSOR_ATTR(in1_input, 0444, show_in_value, NULL, 1),
486 SENSOR_ATTR(in2_input, 0444, show_in_value, NULL, 2),
487 SENSOR_ATTR(alert_led, 0644, show_alert_led, store_alert_led, 0),
490 static struct sensor_device_attribute fschmd_temp_attr[] = {
491 SENSOR_ATTR(temp1_input, 0444, show_temp_value, NULL, 0),
492 SENSOR_ATTR(temp1_max, 0644, show_temp_max, store_temp_max, 0),
493 SENSOR_ATTR(temp1_fault, 0444, show_temp_fault, NULL, 0),
494 SENSOR_ATTR(temp1_alarm, 0444, show_temp_alarm, NULL, 0),
495 SENSOR_ATTR(temp2_input, 0444, show_temp_value, NULL, 1),
496 SENSOR_ATTR(temp2_max, 0644, show_temp_max, store_temp_max, 1),
497 SENSOR_ATTR(temp2_fault, 0444, show_temp_fault, NULL, 1),
498 SENSOR_ATTR(temp2_alarm, 0444, show_temp_alarm, NULL, 1),
499 SENSOR_ATTR(temp3_input, 0444, show_temp_value, NULL, 2),
500 SENSOR_ATTR(temp3_max, 0644, show_temp_max, store_temp_max, 2),
501 SENSOR_ATTR(temp3_fault, 0444, show_temp_fault, NULL, 2),
502 SENSOR_ATTR(temp3_alarm, 0444, show_temp_alarm, NULL, 2),
503 SENSOR_ATTR(temp4_input, 0444, show_temp_value, NULL, 3),
504 SENSOR_ATTR(temp4_max, 0644, show_temp_max, store_temp_max, 3),
505 SENSOR_ATTR(temp4_fault, 0444, show_temp_fault, NULL, 3),
506 SENSOR_ATTR(temp4_alarm, 0444, show_temp_alarm, NULL, 3),
507 SENSOR_ATTR(temp5_input, 0444, show_temp_value, NULL, 4),
508 SENSOR_ATTR(temp5_max, 0644, show_temp_max, store_temp_max, 4),
509 SENSOR_ATTR(temp5_fault, 0444, show_temp_fault, NULL, 4),
510 SENSOR_ATTR(temp5_alarm, 0444, show_temp_alarm, NULL, 4),
513 static struct sensor_device_attribute fschmd_fan_attr[] = {
514 SENSOR_ATTR(fan1_input, 0444, show_fan_value, NULL, 0),
515 SENSOR_ATTR(fan1_div, 0644, show_fan_div, store_fan_div, 0),
516 SENSOR_ATTR(fan1_alarm, 0444, show_fan_alarm, NULL, 0),
517 SENSOR_ATTR(fan1_fault, 0444, show_fan_fault, NULL, 0),
518 SENSOR_ATTR(pwm1_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
519 store_pwm_auto_point1_pwm, 0),
520 SENSOR_ATTR(fan2_input, 0444, show_fan_value, NULL, 1),
521 SENSOR_ATTR(fan2_div, 0644, show_fan_div, store_fan_div, 1),
522 SENSOR_ATTR(fan2_alarm, 0444, show_fan_alarm, NULL, 1),
523 SENSOR_ATTR(fan2_fault, 0444, show_fan_fault, NULL, 1),
524 SENSOR_ATTR(pwm2_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
525 store_pwm_auto_point1_pwm, 1),
526 SENSOR_ATTR(fan3_input, 0444, show_fan_value, NULL, 2),
527 SENSOR_ATTR(fan3_div, 0644, show_fan_div, store_fan_div, 2),
528 SENSOR_ATTR(fan3_alarm, 0444, show_fan_alarm, NULL, 2),
529 SENSOR_ATTR(fan3_fault, 0444, show_fan_fault, NULL, 2),
530 SENSOR_ATTR(pwm3_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
531 store_pwm_auto_point1_pwm, 2),
532 SENSOR_ATTR(fan4_input, 0444, show_fan_value, NULL, 3),
533 SENSOR_ATTR(fan4_div, 0644, show_fan_div, store_fan_div, 3),
534 SENSOR_ATTR(fan4_alarm, 0444, show_fan_alarm, NULL, 3),
535 SENSOR_ATTR(fan4_fault, 0444, show_fan_fault, NULL, 3),
536 SENSOR_ATTR(pwm4_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
537 store_pwm_auto_point1_pwm, 3),
538 SENSOR_ATTR(fan5_input, 0444, show_fan_value, NULL, 4),
539 SENSOR_ATTR(fan5_div, 0644, show_fan_div, store_fan_div, 4),
540 SENSOR_ATTR(fan5_alarm, 0444, show_fan_alarm, NULL, 4),
541 SENSOR_ATTR(fan5_fault, 0444, show_fan_fault, NULL, 4),
542 SENSOR_ATTR(pwm5_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
543 store_pwm_auto_point1_pwm, 4),
544 SENSOR_ATTR(fan6_input, 0444, show_fan_value, NULL, 5),
545 SENSOR_ATTR(fan6_div, 0644, show_fan_div, store_fan_div, 5),
546 SENSOR_ATTR(fan6_alarm, 0444, show_fan_alarm, NULL, 5),
547 SENSOR_ATTR(fan6_fault, 0444, show_fan_fault, NULL, 5),
548 SENSOR_ATTR(pwm6_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
549 store_pwm_auto_point1_pwm, 5),
557 /* DMI decode routine to read voltage scaling factors from special DMI tables,
558 which are available on FSC machines with an fscher or later chip. */
559 static void fschmd_dmi_decode(const struct dmi_header *header)
561 int i, mult[3] = { 0 }, offset[3] = { 0 }, vref = 0, found = 0;
563 /* dmi code ugliness, we get passed the address of the contents of
564 a complete DMI record, but in the form of a dmi_header pointer, in
565 reality this address holds header->length bytes of which the header
566 are the first 4 bytes */
567 u8 *dmi_data = (u8 *)header;
569 /* We are looking for OEM-specific type 185 */
570 if (header->type != 185)
573 /* we are looking for what Siemens calls "subtype" 19, the subtype
574 is stored in byte 5 of the dmi block */
575 if (header->length < 5 || dmi_data[4] != 19)
578 /* After the subtype comes 1 unknown byte and then blocks of 5 bytes,
579 consisting of what Siemens calls an "Entity" number, followed by
580 2 16-bit words in LSB first order */
581 for (i = 6; (i + 4) < header->length; i += 5) {
582 /* entity 1 - 3: voltage multiplier and offset */
583 if (dmi_data[i] >= 1 && dmi_data[i] <= 3) {
584 /* Our in sensors order and the DMI order differ */
585 const int shuffle[3] = { 1, 0, 2 };
586 int in = shuffle[dmi_data[i] - 1];
588 /* Check for twice the same entity */
589 if (found & (1 << in))
592 mult[in] = dmi_data[i + 1] | (dmi_data[i + 2] << 8);
593 offset[in] = dmi_data[i + 3] | (dmi_data[i + 4] << 8);
598 /* entity 7: reference voltage */
599 if (dmi_data[i] == 7) {
600 /* Check for twice the same entity */
604 vref = dmi_data[i + 1] | (dmi_data[i + 2] << 8);
611 for (i = 0; i < 3; i++) {
612 dmi_mult[i] = mult[i] * 10;
613 dmi_offset[i] = offset[i] * 10;
619 static int fschmd_detect(struct i2c_client *client, int kind,
620 struct i2c_board_info *info)
622 struct i2c_adapter *adapter = client->adapter;
623 const char * const client_names[5] = { "fscpos", "fscher", "fscscy",
624 "fschrc", "fschmd" };
626 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
629 /* Detect & Identify the chip */
633 id[0] = i2c_smbus_read_byte_data(client,
635 id[1] = i2c_smbus_read_byte_data(client,
637 id[2] = i2c_smbus_read_byte_data(client,
641 if (!strcmp(id, "PEG"))
643 else if (!strcmp(id, "HER"))
645 else if (!strcmp(id, "SCY"))
647 else if (!strcmp(id, "HRC"))
649 else if (!strcmp(id, "HMD"))
655 strlcpy(info->type, client_names[kind - 1], I2C_NAME_SIZE);
660 static int fschmd_probe(struct i2c_client *client,
661 const struct i2c_device_id *id)
663 struct fschmd_data *data;
665 const char * const names[5] = { "Poseidon", "Hermes", "Scylla",
666 "Heracles", "Heimdall" };
668 enum chips kind = id->driver_data;
670 data = kzalloc(sizeof(struct fschmd_data), GFP_KERNEL);
674 i2c_set_clientdata(client, data);
675 mutex_init(&data->update_lock);
677 if (kind == fscpos) {
678 /* The Poseidon has hardwired temp limits, fill these
679 in for the alarm resetting code */
680 data->temp_max[0] = 70 + 128;
681 data->temp_max[1] = 50 + 128;
682 data->temp_max[2] = 50 + 128;
685 /* Read the special DMI table for fscher and newer chips */
686 if (kind == fscher || kind >= fschrc) {
687 dmi_walk(fschmd_dmi_decode);
688 if (dmi_vref == -1) {
689 printk(KERN_WARNING FSCHMD_NAME
690 ": Couldn't get voltage scaling factors from "
691 "BIOS DMI table, using builtin defaults\n");
696 /* i2c kind goes from 1-5, we want from 0-4 to address arrays */
697 data->kind = kind - 1;
699 for (i = 0; i < ARRAY_SIZE(fschmd_attr); i++) {
700 err = device_create_file(&client->dev,
701 &fschmd_attr[i].dev_attr);
706 for (i = 0; i < (FSCHMD_NO_TEMP_SENSORS[data->kind] * 4); i++) {
707 /* Poseidon doesn't have TEMP_LIMIT registers */
708 if (kind == fscpos && fschmd_temp_attr[i].dev_attr.show ==
712 err = device_create_file(&client->dev,
713 &fschmd_temp_attr[i].dev_attr);
718 for (i = 0; i < (FSCHMD_NO_FAN_SENSORS[data->kind] * 5); i++) {
719 /* Poseidon doesn't have a FAN_MIN register for its 3rd fan */
720 if (kind == fscpos &&
721 !strcmp(fschmd_fan_attr[i].dev_attr.attr.name,
722 "pwm3_auto_point1_pwm"))
725 err = device_create_file(&client->dev,
726 &fschmd_fan_attr[i].dev_attr);
731 data->hwmon_dev = hwmon_device_register(&client->dev);
732 if (IS_ERR(data->hwmon_dev)) {
733 err = PTR_ERR(data->hwmon_dev);
734 data->hwmon_dev = NULL;
738 revision = i2c_smbus_read_byte_data(client, FSCHMD_REG_REVISION);
739 printk(KERN_INFO FSCHMD_NAME ": Detected FSC %s chip, revision: %d\n",
740 names[data->kind], (int) revision);
745 fschmd_remove(client); /* will also free data for us */
749 static int fschmd_remove(struct i2c_client *client)
751 struct fschmd_data *data = i2c_get_clientdata(client);
754 /* Check if registered in case we're called from fschmd_detect
755 to cleanup after an error */
757 hwmon_device_unregister(data->hwmon_dev);
759 for (i = 0; i < ARRAY_SIZE(fschmd_attr); i++)
760 device_remove_file(&client->dev, &fschmd_attr[i].dev_attr);
761 for (i = 0; i < (FSCHMD_NO_TEMP_SENSORS[data->kind] * 4); i++)
762 device_remove_file(&client->dev,
763 &fschmd_temp_attr[i].dev_attr);
764 for (i = 0; i < (FSCHMD_NO_FAN_SENSORS[data->kind] * 5); i++)
765 device_remove_file(&client->dev,
766 &fschmd_fan_attr[i].dev_attr);
772 static struct fschmd_data *fschmd_update_device(struct device *dev)
774 struct i2c_client *client = to_i2c_client(dev);
775 struct fschmd_data *data = i2c_get_clientdata(client);
778 mutex_lock(&data->update_lock);
780 if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
782 for (i = 0; i < FSCHMD_NO_TEMP_SENSORS[data->kind]; i++) {
783 data->temp_act[i] = i2c_smbus_read_byte_data(client,
784 FSCHMD_REG_TEMP_ACT[data->kind][i]);
785 data->temp_status[i] = i2c_smbus_read_byte_data(client,
786 FSCHMD_REG_TEMP_STATE[data->kind][i]);
788 /* The fscpos doesn't have TEMP_LIMIT registers */
789 if (FSCHMD_REG_TEMP_LIMIT[data->kind][i])
790 data->temp_max[i] = i2c_smbus_read_byte_data(
792 FSCHMD_REG_TEMP_LIMIT[data->kind][i]);
794 /* reset alarm if the alarm condition is gone,
795 the chip doesn't do this itself */
796 if ((data->temp_status[i] & FSCHMD_TEMP_ALARM_MASK) ==
797 FSCHMD_TEMP_ALARM_MASK &&
798 data->temp_act[i] < data->temp_max[i])
799 i2c_smbus_write_byte_data(client,
800 FSCHMD_REG_TEMP_STATE[data->kind][i],
801 FSCHMD_TEMP_ALERT_MASK);
804 for (i = 0; i < FSCHMD_NO_FAN_SENSORS[data->kind]; i++) {
805 data->fan_act[i] = i2c_smbus_read_byte_data(client,
806 FSCHMD_REG_FAN_ACT[data->kind][i]);
807 data->fan_status[i] = i2c_smbus_read_byte_data(client,
808 FSCHMD_REG_FAN_STATE[data->kind][i]);
809 data->fan_ripple[i] = i2c_smbus_read_byte_data(client,
810 FSCHMD_REG_FAN_RIPPLE[data->kind][i]);
812 /* The fscpos third fan doesn't have a fan_min */
813 if (FSCHMD_REG_FAN_MIN[data->kind][i])
814 data->fan_min[i] = i2c_smbus_read_byte_data(
816 FSCHMD_REG_FAN_MIN[data->kind][i]);
818 /* reset fan status if speed is back to > 0 */
819 if ((data->fan_status[i] & FSCHMD_FAN_ALARM_MASK) &&
821 i2c_smbus_write_byte_data(client,
822 FSCHMD_REG_FAN_STATE[data->kind][i],
823 FSCHMD_FAN_ALARM_MASK);
826 for (i = 0; i < 3; i++)
827 data->volt[i] = i2c_smbus_read_byte_data(client,
830 data->global_control = i2c_smbus_read_byte_data(client,
833 /* To be implemented in the future
834 data->watchdog[0] = i2c_smbus_read_byte_data(client,
835 FSCHMD_REG_WDOG_PRESET);
836 data->watchdog[1] = i2c_smbus_read_byte_data(client,
837 FSCHMD_REG_WDOG_STATE);
838 data->watchdog[2] = i2c_smbus_read_byte_data(client,
839 FSCHMD_REG_WDOG_CONTROL); */
841 data->last_updated = jiffies;
845 mutex_unlock(&data->update_lock);
850 static int __init fschmd_init(void)
852 return i2c_add_driver(&fschmd_driver);
855 static void __exit fschmd_exit(void)
857 i2c_del_driver(&fschmd_driver);
860 MODULE_AUTHOR("Hans de Goede <j.w.r.degoede@hhs.nl>");
861 MODULE_DESCRIPTION("FSC Poseidon, Hermes, Scylla, Heracles and "
863 MODULE_LICENSE("GPL");
865 module_init(fschmd_init);
866 module_exit(fschmd_exit);