]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | fscpos.c - Kernel module for hardware monitoring with FSC Poseidon chips | |
3 | Copyright (C) 2004, 2005 Stefan Ott <stefan@desire.ch> | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | */ | |
19 | ||
20 | /* | |
21 | fujitsu siemens poseidon chip, | |
22 | module based on the old fscpos module by Hermann Jung <hej@odn.de> and | |
23 | the fscher module by Reinhard Nissl <rnissl@gmx.de> | |
24 | ||
25 | original module based on lm80.c | |
26 | Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> | |
27 | and Philip Edelbrock <phil@netroedge.com> | |
28 | ||
29 | Thanks to Jean Delvare for reviewing my code and suggesting a lot of | |
30 | improvements. | |
31 | */ | |
32 | ||
33 | #include <linux/module.h> | |
34 | #include <linux/slab.h> | |
0cacdf29 | 35 | #include <linux/jiffies.h> |
1da177e4 LT |
36 | #include <linux/i2c.h> |
37 | #include <linux/i2c-sensor.h> | |
38 | #include <linux/init.h> | |
943b0830 MH |
39 | #include <linux/hwmon.h> |
40 | #include <linux/err.h> | |
1da177e4 LT |
41 | |
42 | /* | |
43 | * Addresses to scan | |
44 | */ | |
45 | static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END }; | |
1da177e4 LT |
46 | |
47 | /* | |
48 | * Insmod parameters | |
49 | */ | |
50 | SENSORS_INSMOD_1(fscpos); | |
51 | ||
52 | /* | |
53 | * The FSCPOS registers | |
54 | */ | |
55 | ||
56 | /* chip identification */ | |
57 | #define FSCPOS_REG_IDENT_0 0x00 | |
58 | #define FSCPOS_REG_IDENT_1 0x01 | |
59 | #define FSCPOS_REG_IDENT_2 0x02 | |
60 | #define FSCPOS_REG_REVISION 0x03 | |
61 | ||
62 | /* global control and status */ | |
63 | #define FSCPOS_REG_EVENT_STATE 0x04 | |
64 | #define FSCPOS_REG_CONTROL 0x05 | |
65 | ||
66 | /* watchdog */ | |
67 | #define FSCPOS_REG_WDOG_PRESET 0x28 | |
68 | #define FSCPOS_REG_WDOG_STATE 0x23 | |
69 | #define FSCPOS_REG_WDOG_CONTROL 0x21 | |
70 | ||
71 | /* voltages */ | |
72 | #define FSCPOS_REG_VOLT_12 0x45 | |
73 | #define FSCPOS_REG_VOLT_5 0x42 | |
74 | #define FSCPOS_REG_VOLT_BATT 0x48 | |
75 | ||
76 | /* fans - the chip does not support minimum speed for fan2 */ | |
77 | static u8 FSCPOS_REG_PWM[] = { 0x55, 0x65 }; | |
78 | static u8 FSCPOS_REG_FAN_ACT[] = { 0x0e, 0x6b, 0xab }; | |
79 | static u8 FSCPOS_REG_FAN_STATE[] = { 0x0d, 0x62, 0xa2 }; | |
80 | static u8 FSCPOS_REG_FAN_RIPPLE[] = { 0x0f, 0x6f, 0xaf }; | |
81 | ||
82 | /* temperatures */ | |
83 | static u8 FSCPOS_REG_TEMP_ACT[] = { 0x64, 0x32, 0x35 }; | |
84 | static u8 FSCPOS_REG_TEMP_STATE[] = { 0x71, 0x81, 0x91 }; | |
85 | ||
86 | /* | |
87 | * Functions declaration | |
88 | */ | |
89 | static int fscpos_attach_adapter(struct i2c_adapter *adapter); | |
90 | static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind); | |
91 | static int fscpos_detach_client(struct i2c_client *client); | |
92 | ||
93 | static int fscpos_read_value(struct i2c_client *client, u8 register); | |
94 | static int fscpos_write_value(struct i2c_client *client, u8 register, u8 value); | |
95 | static struct fscpos_data *fscpos_update_device(struct device *dev); | |
96 | static void fscpos_init_client(struct i2c_client *client); | |
97 | ||
98 | static void reset_fan_alarm(struct i2c_client *client, int nr); | |
99 | ||
100 | /* | |
101 | * Driver data (common to all clients) | |
102 | */ | |
103 | static struct i2c_driver fscpos_driver = { | |
104 | .owner = THIS_MODULE, | |
105 | .name = "fscpos", | |
106 | .id = I2C_DRIVERID_FSCPOS, | |
107 | .flags = I2C_DF_NOTIFY, | |
108 | .attach_adapter = fscpos_attach_adapter, | |
109 | .detach_client = fscpos_detach_client, | |
110 | }; | |
111 | ||
112 | /* | |
113 | * Client data (each client gets its own) | |
114 | */ | |
115 | struct fscpos_data { | |
116 | struct i2c_client client; | |
943b0830 | 117 | struct class_device *class_dev; |
1da177e4 LT |
118 | struct semaphore update_lock; |
119 | char valid; /* 0 until following fields are valid */ | |
120 | unsigned long last_updated; /* In jiffies */ | |
121 | ||
122 | /* register values */ | |
123 | u8 revision; /* revision of chip */ | |
124 | u8 global_event; /* global event status */ | |
125 | u8 global_control; /* global control register */ | |
126 | u8 wdog_control; /* watchdog control */ | |
127 | u8 wdog_state; /* watchdog status */ | |
128 | u8 wdog_preset; /* watchdog preset */ | |
129 | u8 volt[3]; /* 12, 5, battery current */ | |
130 | u8 temp_act[3]; /* temperature */ | |
131 | u8 temp_status[3]; /* status of sensor */ | |
132 | u8 fan_act[3]; /* fans revolutions per second */ | |
133 | u8 fan_status[3]; /* fan status */ | |
134 | u8 pwm[2]; /* fan min value for rps */ | |
135 | u8 fan_ripple[3]; /* divider for rps */ | |
136 | }; | |
137 | ||
138 | /* Temperature */ | |
139 | #define TEMP_FROM_REG(val) (((val) - 128) * 1000) | |
140 | ||
141 | static ssize_t show_temp_input(struct fscpos_data *data, char *buf, int nr) | |
142 | { | |
143 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[nr - 1])); | |
144 | } | |
145 | ||
146 | static ssize_t show_temp_status(struct fscpos_data *data, char *buf, int nr) | |
147 | { | |
148 | /* bits 2..7 reserved => mask with 0x03 */ | |
149 | return sprintf(buf, "%u\n", data->temp_status[nr - 1] & 0x03); | |
150 | } | |
151 | ||
152 | static ssize_t show_temp_reset(struct fscpos_data *data, char *buf, int nr) | |
153 | { | |
154 | return sprintf(buf, "1\n"); | |
155 | } | |
156 | ||
157 | static ssize_t set_temp_reset(struct i2c_client *client, struct fscpos_data | |
158 | *data, const char *buf, size_t count, int nr, int reg) | |
159 | { | |
160 | unsigned long v = simple_strtoul(buf, NULL, 10); | |
161 | if (v != 1) { | |
162 | dev_err(&client->dev, "temp_reset value %ld not supported. " | |
163 | "Use 1 to reset the alarm!\n", v); | |
164 | return -EINVAL; | |
165 | } | |
166 | ||
167 | dev_info(&client->dev, "You used the temp_reset feature which has not " | |
168 | "been proplerly tested. Please report your " | |
169 | "experience to the module author.\n"); | |
170 | ||
171 | /* Supported value: 2 (clears the status) */ | |
3fd1bb9b | 172 | fscpos_write_value(client, FSCPOS_REG_TEMP_STATE[nr - 1], 2); |
1da177e4 LT |
173 | return count; |
174 | } | |
175 | ||
176 | /* Fans */ | |
177 | #define RPM_FROM_REG(val) ((val) * 60) | |
178 | ||
179 | static ssize_t show_fan_status(struct fscpos_data *data, char *buf, int nr) | |
180 | { | |
181 | /* bits 0..1, 3..7 reserved => mask with 0x04 */ | |
182 | return sprintf(buf, "%u\n", data->fan_status[nr - 1] & 0x04); | |
183 | } | |
184 | ||
185 | static ssize_t show_fan_input(struct fscpos_data *data, char *buf, int nr) | |
186 | { | |
187 | return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[nr - 1])); | |
188 | } | |
189 | ||
190 | static ssize_t show_fan_ripple(struct fscpos_data *data, char *buf, int nr) | |
191 | { | |
192 | /* bits 2..7 reserved => mask with 0x03 */ | |
193 | return sprintf(buf, "%u\n", data->fan_ripple[nr - 1] & 0x03); | |
194 | } | |
195 | ||
196 | static ssize_t set_fan_ripple(struct i2c_client *client, struct fscpos_data | |
197 | *data, const char *buf, size_t count, int nr, int reg) | |
198 | { | |
199 | /* supported values: 2, 4, 8 */ | |
200 | unsigned long v = simple_strtoul(buf, NULL, 10); | |
201 | ||
202 | switch (v) { | |
203 | case 2: v = 1; break; | |
204 | case 4: v = 2; break; | |
205 | case 8: v = 3; break; | |
206 | default: | |
207 | dev_err(&client->dev, "fan_ripple value %ld not supported. " | |
208 | "Must be one of 2, 4 or 8!\n", v); | |
209 | return -EINVAL; | |
210 | } | |
211 | ||
212 | down(&data->update_lock); | |
213 | /* bits 2..7 reserved => mask with 0x03 */ | |
214 | data->fan_ripple[nr - 1] &= ~0x03; | |
215 | data->fan_ripple[nr - 1] |= v; | |
216 | ||
217 | fscpos_write_value(client, reg, data->fan_ripple[nr - 1]); | |
218 | up(&data->update_lock); | |
219 | return count; | |
220 | } | |
221 | ||
222 | static ssize_t show_pwm(struct fscpos_data *data, char *buf, int nr) | |
223 | { | |
224 | return sprintf(buf, "%u\n", data->pwm[nr - 1]); | |
225 | } | |
226 | ||
227 | static ssize_t set_pwm(struct i2c_client *client, struct fscpos_data *data, | |
228 | const char *buf, size_t count, int nr, int reg) | |
229 | { | |
230 | unsigned long v = simple_strtoul(buf, NULL, 10); | |
231 | ||
232 | /* Range: 0..255 */ | |
233 | if (v < 0) v = 0; | |
234 | if (v > 255) v = 255; | |
235 | ||
236 | down(&data->update_lock); | |
237 | data->pwm[nr - 1] = v; | |
238 | fscpos_write_value(client, reg, data->pwm[nr - 1]); | |
239 | up(&data->update_lock); | |
240 | return count; | |
241 | } | |
242 | ||
243 | static void reset_fan_alarm(struct i2c_client *client, int nr) | |
244 | { | |
245 | fscpos_write_value(client, FSCPOS_REG_FAN_STATE[nr], 4); | |
246 | } | |
247 | ||
248 | /* Volts */ | |
249 | #define VOLT_FROM_REG(val, mult) ((val) * (mult) / 255) | |
250 | ||
30f74292 | 251 | static ssize_t show_volt_12(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
252 | { |
253 | struct fscpos_data *data = fscpos_update_device(dev); | |
254 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[0], 14200)); | |
255 | } | |
256 | ||
30f74292 | 257 | static ssize_t show_volt_5(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
258 | { |
259 | struct fscpos_data *data = fscpos_update_device(dev); | |
260 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[1], 6600)); | |
261 | } | |
262 | ||
30f74292 | 263 | static ssize_t show_volt_batt(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
264 | { |
265 | struct fscpos_data *data = fscpos_update_device(dev); | |
266 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[2], 3300)); | |
267 | } | |
268 | ||
269 | /* Watchdog */ | |
270 | static ssize_t show_wdog_control(struct fscpos_data *data, char *buf) | |
271 | { | |
272 | /* bits 0..3 reserved, bit 6 write only => mask with 0xb0 */ | |
273 | return sprintf(buf, "%u\n", data->wdog_control & 0xb0); | |
274 | } | |
275 | ||
276 | static ssize_t set_wdog_control(struct i2c_client *client, struct fscpos_data | |
277 | *data, const char *buf, size_t count, int reg) | |
278 | { | |
279 | /* bits 0..3 reserved => mask with 0xf0 */ | |
280 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0; | |
281 | ||
282 | down(&data->update_lock); | |
283 | data->wdog_control &= ~0xf0; | |
284 | data->wdog_control |= v; | |
285 | fscpos_write_value(client, reg, data->wdog_control); | |
286 | up(&data->update_lock); | |
287 | return count; | |
288 | } | |
289 | ||
290 | static ssize_t show_wdog_state(struct fscpos_data *data, char *buf) | |
291 | { | |
292 | /* bits 0, 2..7 reserved => mask with 0x02 */ | |
293 | return sprintf(buf, "%u\n", data->wdog_state & 0x02); | |
294 | } | |
295 | ||
296 | static ssize_t set_wdog_state(struct i2c_client *client, struct fscpos_data | |
297 | *data, const char *buf, size_t count, int reg) | |
298 | { | |
299 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02; | |
300 | ||
301 | /* Valid values: 2 (clear) */ | |
302 | if (v != 2) { | |
303 | dev_err(&client->dev, "wdog_state value %ld not supported. " | |
304 | "Must be 2 to clear the state!\n", v); | |
305 | return -EINVAL; | |
306 | } | |
307 | ||
308 | down(&data->update_lock); | |
309 | data->wdog_state &= ~v; | |
310 | fscpos_write_value(client, reg, v); | |
311 | up(&data->update_lock); | |
312 | return count; | |
313 | } | |
314 | ||
315 | static ssize_t show_wdog_preset(struct fscpos_data *data, char *buf) | |
316 | { | |
317 | return sprintf(buf, "%u\n", data->wdog_preset); | |
318 | } | |
319 | ||
320 | static ssize_t set_wdog_preset(struct i2c_client *client, struct fscpos_data | |
321 | *data, const char *buf, size_t count, int reg) | |
322 | { | |
323 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff; | |
324 | ||
325 | down(&data->update_lock); | |
326 | data->wdog_preset = v; | |
327 | fscpos_write_value(client, reg, data->wdog_preset); | |
328 | up(&data->update_lock); | |
329 | return count; | |
330 | } | |
331 | ||
332 | /* Event */ | |
30f74292 | 333 | static ssize_t show_event(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
334 | { |
335 | /* bits 5..7 reserved => mask with 0x1f */ | |
336 | struct fscpos_data *data = fscpos_update_device(dev); | |
337 | return sprintf(buf, "%u\n", data->global_event & 0x9b); | |
338 | } | |
339 | ||
340 | /* | |
341 | * Sysfs stuff | |
342 | */ | |
343 | #define create_getter(kind, sub) \ | |
30f74292 | 344 | static ssize_t sysfs_show_##kind##sub(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
345 | { \ |
346 | struct fscpos_data *data = fscpos_update_device(dev); \ | |
347 | return show_##kind##sub(data, buf); \ | |
348 | } | |
349 | ||
350 | #define create_getter_n(kind, offset, sub) \ | |
30f74292 | 351 | static ssize_t sysfs_show_##kind##offset##sub(struct device *dev, struct device_attribute *attr, char\ |
1da177e4 LT |
352 | *buf) \ |
353 | { \ | |
354 | struct fscpos_data *data = fscpos_update_device(dev); \ | |
355 | return show_##kind##sub(data, buf, offset); \ | |
356 | } | |
357 | ||
358 | #define create_setter(kind, sub, reg) \ | |
30f74292 | 359 | static ssize_t sysfs_set_##kind##sub (struct device *dev, struct device_attribute *attr, const char \ |
1da177e4 LT |
360 | *buf, size_t count) \ |
361 | { \ | |
362 | struct i2c_client *client = to_i2c_client(dev); \ | |
363 | struct fscpos_data *data = i2c_get_clientdata(client); \ | |
364 | return set_##kind##sub(client, data, buf, count, reg); \ | |
365 | } | |
366 | ||
367 | #define create_setter_n(kind, offset, sub, reg) \ | |
30f74292 | 368 | static ssize_t sysfs_set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
369 | const char *buf, size_t count) \ |
370 | { \ | |
371 | struct i2c_client *client = to_i2c_client(dev); \ | |
372 | struct fscpos_data *data = i2c_get_clientdata(client); \ | |
373 | return set_##kind##sub(client, data, buf, count, offset, reg);\ | |
374 | } | |
375 | ||
376 | #define create_sysfs_device_ro(kind, sub, offset) \ | |
377 | static DEVICE_ATTR(kind##offset##sub, S_IRUGO, \ | |
378 | sysfs_show_##kind##offset##sub, NULL); | |
379 | ||
380 | #define create_sysfs_device_rw(kind, sub, offset) \ | |
381 | static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, \ | |
382 | sysfs_show_##kind##offset##sub, sysfs_set_##kind##offset##sub); | |
383 | ||
384 | #define sysfs_ro_n(kind, sub, offset) \ | |
385 | create_getter_n(kind, offset, sub); \ | |
386 | create_sysfs_device_ro(kind, sub, offset); | |
387 | ||
388 | #define sysfs_rw_n(kind, sub, offset, reg) \ | |
389 | create_getter_n(kind, offset, sub); \ | |
390 | create_setter_n(kind, offset, sub, reg); \ | |
391 | create_sysfs_device_rw(kind, sub, offset); | |
392 | ||
393 | #define sysfs_rw(kind, sub, reg) \ | |
394 | create_getter(kind, sub); \ | |
395 | create_setter(kind, sub, reg); \ | |
396 | create_sysfs_device_rw(kind, sub,); | |
397 | ||
398 | #define sysfs_fan_with_min(offset, reg_status, reg_ripple, reg_min) \ | |
399 | sysfs_fan(offset, reg_status, reg_ripple); \ | |
400 | sysfs_rw_n(pwm,, offset, reg_min); | |
401 | ||
402 | #define sysfs_fan(offset, reg_status, reg_ripple) \ | |
403 | sysfs_ro_n(fan, _input, offset); \ | |
404 | sysfs_ro_n(fan, _status, offset); \ | |
405 | sysfs_rw_n(fan, _ripple, offset, reg_ripple); | |
406 | ||
407 | #define sysfs_temp(offset, reg_status) \ | |
408 | sysfs_ro_n(temp, _input, offset); \ | |
409 | sysfs_ro_n(temp, _status, offset); \ | |
410 | sysfs_rw_n(temp, _reset, offset, reg_status); | |
411 | ||
412 | #define sysfs_watchdog(reg_wdog_preset, reg_wdog_state, reg_wdog_control) \ | |
413 | sysfs_rw(wdog, _control, reg_wdog_control); \ | |
414 | sysfs_rw(wdog, _preset, reg_wdog_preset); \ | |
415 | sysfs_rw(wdog, _state, reg_wdog_state); | |
416 | ||
417 | sysfs_fan_with_min(1, FSCPOS_REG_FAN_STATE[0], FSCPOS_REG_FAN_RIPPLE[0], | |
418 | FSCPOS_REG_PWM[0]); | |
419 | sysfs_fan_with_min(2, FSCPOS_REG_FAN_STATE[1], FSCPOS_REG_FAN_RIPPLE[1], | |
420 | FSCPOS_REG_PWM[1]); | |
421 | sysfs_fan(3, FSCPOS_REG_FAN_STATE[2], FSCPOS_REG_FAN_RIPPLE[2]); | |
422 | ||
423 | sysfs_temp(1, FSCPOS_REG_TEMP_STATE[0]); | |
424 | sysfs_temp(2, FSCPOS_REG_TEMP_STATE[1]); | |
425 | sysfs_temp(3, FSCPOS_REG_TEMP_STATE[2]); | |
426 | ||
427 | sysfs_watchdog(FSCPOS_REG_WDOG_PRESET, FSCPOS_REG_WDOG_STATE, | |
428 | FSCPOS_REG_WDOG_CONTROL); | |
429 | ||
430 | static DEVICE_ATTR(event, S_IRUGO, show_event, NULL); | |
431 | static DEVICE_ATTR(in0_input, S_IRUGO, show_volt_12, NULL); | |
432 | static DEVICE_ATTR(in1_input, S_IRUGO, show_volt_5, NULL); | |
433 | static DEVICE_ATTR(in2_input, S_IRUGO, show_volt_batt, NULL); | |
434 | ||
435 | static int fscpos_attach_adapter(struct i2c_adapter *adapter) | |
436 | { | |
437 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
438 | return 0; | |
439 | return i2c_detect(adapter, &addr_data, fscpos_detect); | |
440 | } | |
441 | ||
442 | int fscpos_detect(struct i2c_adapter *adapter, int address, int kind) | |
443 | { | |
444 | struct i2c_client *new_client; | |
445 | struct fscpos_data *data; | |
446 | int err = 0; | |
447 | ||
448 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
449 | goto exit; | |
450 | ||
451 | /* | |
452 | * OK. For now, we presume we have a valid client. We now create the | |
453 | * client structure, even though we cannot fill it completely yet. | |
454 | * But it allows us to access fscpos_{read,write}_value. | |
455 | */ | |
456 | ||
457 | if (!(data = kmalloc(sizeof(struct fscpos_data), GFP_KERNEL))) { | |
458 | err = -ENOMEM; | |
459 | goto exit; | |
460 | } | |
461 | memset(data, 0, sizeof(struct fscpos_data)); | |
462 | ||
463 | new_client = &data->client; | |
464 | i2c_set_clientdata(new_client, data); | |
465 | new_client->addr = address; | |
466 | new_client->adapter = adapter; | |
467 | new_client->driver = &fscpos_driver; | |
468 | new_client->flags = 0; | |
469 | ||
470 | /* Do the remaining detection unless force or force_fscpos parameter */ | |
471 | if (kind < 0) { | |
472 | if ((fscpos_read_value(new_client, FSCPOS_REG_IDENT_0) | |
473 | != 0x50) /* 'P' */ | |
474 | || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_1) | |
475 | != 0x45) /* 'E' */ | |
476 | || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_2) | |
477 | != 0x47))/* 'G' */ | |
478 | { | |
479 | dev_dbg(&new_client->dev, "fscpos detection failed\n"); | |
480 | goto exit_free; | |
481 | } | |
482 | } | |
483 | ||
484 | /* Fill in the remaining client fields and put it in the global list */ | |
485 | strlcpy(new_client->name, "fscpos", I2C_NAME_SIZE); | |
486 | ||
487 | data->valid = 0; | |
488 | init_MUTEX(&data->update_lock); | |
489 | ||
490 | /* Tell the I2C layer a new client has arrived */ | |
491 | if ((err = i2c_attach_client(new_client))) | |
492 | goto exit_free; | |
493 | ||
494 | /* Inizialize the fscpos chip */ | |
495 | fscpos_init_client(new_client); | |
496 | ||
497 | /* Announce that the chip was found */ | |
498 | dev_info(&new_client->dev, "Found fscpos chip, rev %u\n", data->revision); | |
499 | ||
500 | /* Register sysfs hooks */ | |
943b0830 MH |
501 | data->class_dev = hwmon_device_register(&new_client->dev); |
502 | if (IS_ERR(data->class_dev)) { | |
503 | err = PTR_ERR(data->class_dev); | |
504 | goto exit_detach; | |
505 | } | |
506 | ||
1da177e4 LT |
507 | device_create_file(&new_client->dev, &dev_attr_event); |
508 | device_create_file(&new_client->dev, &dev_attr_in0_input); | |
509 | device_create_file(&new_client->dev, &dev_attr_in1_input); | |
510 | device_create_file(&new_client->dev, &dev_attr_in2_input); | |
511 | device_create_file(&new_client->dev, &dev_attr_wdog_control); | |
512 | device_create_file(&new_client->dev, &dev_attr_wdog_preset); | |
513 | device_create_file(&new_client->dev, &dev_attr_wdog_state); | |
514 | device_create_file(&new_client->dev, &dev_attr_temp1_input); | |
515 | device_create_file(&new_client->dev, &dev_attr_temp1_status); | |
516 | device_create_file(&new_client->dev, &dev_attr_temp1_reset); | |
517 | device_create_file(&new_client->dev, &dev_attr_temp2_input); | |
518 | device_create_file(&new_client->dev, &dev_attr_temp2_status); | |
519 | device_create_file(&new_client->dev, &dev_attr_temp2_reset); | |
520 | device_create_file(&new_client->dev, &dev_attr_temp3_input); | |
521 | device_create_file(&new_client->dev, &dev_attr_temp3_status); | |
522 | device_create_file(&new_client->dev, &dev_attr_temp3_reset); | |
523 | device_create_file(&new_client->dev, &dev_attr_fan1_input); | |
524 | device_create_file(&new_client->dev, &dev_attr_fan1_status); | |
525 | device_create_file(&new_client->dev, &dev_attr_fan1_ripple); | |
526 | device_create_file(&new_client->dev, &dev_attr_pwm1); | |
527 | device_create_file(&new_client->dev, &dev_attr_fan2_input); | |
528 | device_create_file(&new_client->dev, &dev_attr_fan2_status); | |
529 | device_create_file(&new_client->dev, &dev_attr_fan2_ripple); | |
530 | device_create_file(&new_client->dev, &dev_attr_pwm2); | |
531 | device_create_file(&new_client->dev, &dev_attr_fan3_input); | |
532 | device_create_file(&new_client->dev, &dev_attr_fan3_status); | |
533 | device_create_file(&new_client->dev, &dev_attr_fan3_ripple); | |
534 | ||
535 | return 0; | |
536 | ||
943b0830 MH |
537 | exit_detach: |
538 | i2c_detach_client(new_client); | |
1da177e4 LT |
539 | exit_free: |
540 | kfree(data); | |
541 | exit: | |
542 | return err; | |
543 | } | |
544 | ||
545 | static int fscpos_detach_client(struct i2c_client *client) | |
546 | { | |
943b0830 | 547 | struct fscpos_data *data = i2c_get_clientdata(client); |
1da177e4 LT |
548 | int err; |
549 | ||
943b0830 MH |
550 | hwmon_device_unregister(data->class_dev); |
551 | ||
1da177e4 LT |
552 | if ((err = i2c_detach_client(client))) { |
553 | dev_err(&client->dev, "Client deregistration failed, client" | |
554 | " not detached.\n"); | |
555 | return err; | |
556 | } | |
943b0830 | 557 | kfree(data); |
1da177e4 LT |
558 | return 0; |
559 | } | |
560 | ||
561 | static int fscpos_read_value(struct i2c_client *client, u8 reg) | |
562 | { | |
563 | dev_dbg(&client->dev, "Read reg 0x%02x\n", reg); | |
564 | return i2c_smbus_read_byte_data(client, reg); | |
565 | } | |
566 | ||
567 | static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value) | |
568 | { | |
569 | dev_dbg(&client->dev, "Write reg 0x%02x, val 0x%02x\n", reg, value); | |
570 | return i2c_smbus_write_byte_data(client, reg, value); | |
571 | } | |
572 | ||
573 | /* Called when we have found a new FSCPOS chip */ | |
574 | static void fscpos_init_client(struct i2c_client *client) | |
575 | { | |
576 | struct fscpos_data *data = i2c_get_clientdata(client); | |
577 | ||
578 | /* read revision from chip */ | |
579 | data->revision = fscpos_read_value(client, FSCPOS_REG_REVISION); | |
580 | } | |
581 | ||
582 | static struct fscpos_data *fscpos_update_device(struct device *dev) | |
583 | { | |
584 | struct i2c_client *client = to_i2c_client(dev); | |
585 | struct fscpos_data *data = i2c_get_clientdata(client); | |
586 | ||
587 | down(&data->update_lock); | |
588 | ||
0cacdf29 | 589 | if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { |
1da177e4 LT |
590 | int i; |
591 | ||
592 | dev_dbg(&client->dev, "Starting fscpos update\n"); | |
593 | ||
594 | for (i = 0; i < 3; i++) { | |
595 | data->temp_act[i] = fscpos_read_value(client, | |
596 | FSCPOS_REG_TEMP_ACT[i]); | |
597 | data->temp_status[i] = fscpos_read_value(client, | |
598 | FSCPOS_REG_TEMP_STATE[i]); | |
599 | data->fan_act[i] = fscpos_read_value(client, | |
600 | FSCPOS_REG_FAN_ACT[i]); | |
601 | data->fan_status[i] = fscpos_read_value(client, | |
602 | FSCPOS_REG_FAN_STATE[i]); | |
603 | data->fan_ripple[i] = fscpos_read_value(client, | |
604 | FSCPOS_REG_FAN_RIPPLE[i]); | |
605 | if (i < 2) { | |
606 | /* fan2_min is not supported by the chip */ | |
607 | data->pwm[i] = fscpos_read_value(client, | |
608 | FSCPOS_REG_PWM[i]); | |
609 | } | |
610 | /* reset fan status if speed is back to > 0 */ | |
611 | if (data->fan_status[i] != 0 && data->fan_act[i] > 0) { | |
612 | reset_fan_alarm(client, i); | |
613 | } | |
614 | } | |
615 | ||
616 | data->volt[0] = fscpos_read_value(client, FSCPOS_REG_VOLT_12); | |
617 | data->volt[1] = fscpos_read_value(client, FSCPOS_REG_VOLT_5); | |
618 | data->volt[2] = fscpos_read_value(client, FSCPOS_REG_VOLT_BATT); | |
619 | ||
620 | data->wdog_preset = fscpos_read_value(client, | |
621 | FSCPOS_REG_WDOG_PRESET); | |
622 | data->wdog_state = fscpos_read_value(client, | |
623 | FSCPOS_REG_WDOG_STATE); | |
624 | data->wdog_control = fscpos_read_value(client, | |
625 | FSCPOS_REG_WDOG_CONTROL); | |
626 | ||
627 | data->global_event = fscpos_read_value(client, | |
628 | FSCPOS_REG_EVENT_STATE); | |
629 | ||
630 | data->last_updated = jiffies; | |
631 | data->valid = 1; | |
632 | } | |
633 | up(&data->update_lock); | |
634 | return data; | |
635 | } | |
636 | ||
637 | static int __init sm_fscpos_init(void) | |
638 | { | |
639 | return i2c_add_driver(&fscpos_driver); | |
640 | } | |
641 | ||
642 | static void __exit sm_fscpos_exit(void) | |
643 | { | |
644 | i2c_del_driver(&fscpos_driver); | |
645 | } | |
646 | ||
647 | MODULE_AUTHOR("Stefan Ott <stefan@desire.ch> based on work from Hermann Jung " | |
648 | "<hej@odn.de>, Frodo Looijaard <frodol@dds.nl>" | |
649 | " and Philip Edelbrock <phil@netroedge.com>"); | |
650 | MODULE_DESCRIPTION("fujitsu siemens poseidon chip driver"); | |
651 | MODULE_LICENSE("GPL"); | |
652 | ||
653 | module_init(sm_fscpos_init); | |
654 | module_exit(sm_fscpos_exit); |