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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> | |
35 | #include <linux/i2c.h> | |
36 | #include <linux/i2c-sensor.h> | |
37 | #include <linux/init.h> | |
38 | ||
39 | /* | |
40 | * Addresses to scan | |
41 | */ | |
42 | static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END }; | |
43 | static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END }; | |
44 | ||
45 | /* | |
46 | * Insmod parameters | |
47 | */ | |
48 | SENSORS_INSMOD_1(fscpos); | |
49 | ||
50 | /* | |
51 | * The FSCPOS registers | |
52 | */ | |
53 | ||
54 | /* chip identification */ | |
55 | #define FSCPOS_REG_IDENT_0 0x00 | |
56 | #define FSCPOS_REG_IDENT_1 0x01 | |
57 | #define FSCPOS_REG_IDENT_2 0x02 | |
58 | #define FSCPOS_REG_REVISION 0x03 | |
59 | ||
60 | /* global control and status */ | |
61 | #define FSCPOS_REG_EVENT_STATE 0x04 | |
62 | #define FSCPOS_REG_CONTROL 0x05 | |
63 | ||
64 | /* watchdog */ | |
65 | #define FSCPOS_REG_WDOG_PRESET 0x28 | |
66 | #define FSCPOS_REG_WDOG_STATE 0x23 | |
67 | #define FSCPOS_REG_WDOG_CONTROL 0x21 | |
68 | ||
69 | /* voltages */ | |
70 | #define FSCPOS_REG_VOLT_12 0x45 | |
71 | #define FSCPOS_REG_VOLT_5 0x42 | |
72 | #define FSCPOS_REG_VOLT_BATT 0x48 | |
73 | ||
74 | /* fans - the chip does not support minimum speed for fan2 */ | |
75 | static u8 FSCPOS_REG_PWM[] = { 0x55, 0x65 }; | |
76 | static u8 FSCPOS_REG_FAN_ACT[] = { 0x0e, 0x6b, 0xab }; | |
77 | static u8 FSCPOS_REG_FAN_STATE[] = { 0x0d, 0x62, 0xa2 }; | |
78 | static u8 FSCPOS_REG_FAN_RIPPLE[] = { 0x0f, 0x6f, 0xaf }; | |
79 | ||
80 | /* temperatures */ | |
81 | static u8 FSCPOS_REG_TEMP_ACT[] = { 0x64, 0x32, 0x35 }; | |
82 | static u8 FSCPOS_REG_TEMP_STATE[] = { 0x71, 0x81, 0x91 }; | |
83 | ||
84 | /* | |
85 | * Functions declaration | |
86 | */ | |
87 | static int fscpos_attach_adapter(struct i2c_adapter *adapter); | |
88 | static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind); | |
89 | static int fscpos_detach_client(struct i2c_client *client); | |
90 | ||
91 | static int fscpos_read_value(struct i2c_client *client, u8 register); | |
92 | static int fscpos_write_value(struct i2c_client *client, u8 register, u8 value); | |
93 | static struct fscpos_data *fscpos_update_device(struct device *dev); | |
94 | static void fscpos_init_client(struct i2c_client *client); | |
95 | ||
96 | static void reset_fan_alarm(struct i2c_client *client, int nr); | |
97 | ||
98 | /* | |
99 | * Driver data (common to all clients) | |
100 | */ | |
101 | static struct i2c_driver fscpos_driver = { | |
102 | .owner = THIS_MODULE, | |
103 | .name = "fscpos", | |
104 | .id = I2C_DRIVERID_FSCPOS, | |
105 | .flags = I2C_DF_NOTIFY, | |
106 | .attach_adapter = fscpos_attach_adapter, | |
107 | .detach_client = fscpos_detach_client, | |
108 | }; | |
109 | ||
110 | /* | |
111 | * Client data (each client gets its own) | |
112 | */ | |
113 | struct fscpos_data { | |
114 | struct i2c_client client; | |
115 | struct semaphore update_lock; | |
116 | char valid; /* 0 until following fields are valid */ | |
117 | unsigned long last_updated; /* In jiffies */ | |
118 | ||
119 | /* register values */ | |
120 | u8 revision; /* revision of chip */ | |
121 | u8 global_event; /* global event status */ | |
122 | u8 global_control; /* global control register */ | |
123 | u8 wdog_control; /* watchdog control */ | |
124 | u8 wdog_state; /* watchdog status */ | |
125 | u8 wdog_preset; /* watchdog preset */ | |
126 | u8 volt[3]; /* 12, 5, battery current */ | |
127 | u8 temp_act[3]; /* temperature */ | |
128 | u8 temp_status[3]; /* status of sensor */ | |
129 | u8 fan_act[3]; /* fans revolutions per second */ | |
130 | u8 fan_status[3]; /* fan status */ | |
131 | u8 pwm[2]; /* fan min value for rps */ | |
132 | u8 fan_ripple[3]; /* divider for rps */ | |
133 | }; | |
134 | ||
135 | /* Temperature */ | |
136 | #define TEMP_FROM_REG(val) (((val) - 128) * 1000) | |
137 | ||
138 | static ssize_t show_temp_input(struct fscpos_data *data, char *buf, int nr) | |
139 | { | |
140 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[nr - 1])); | |
141 | } | |
142 | ||
143 | static ssize_t show_temp_status(struct fscpos_data *data, char *buf, int nr) | |
144 | { | |
145 | /* bits 2..7 reserved => mask with 0x03 */ | |
146 | return sprintf(buf, "%u\n", data->temp_status[nr - 1] & 0x03); | |
147 | } | |
148 | ||
149 | static ssize_t show_temp_reset(struct fscpos_data *data, char *buf, int nr) | |
150 | { | |
151 | return sprintf(buf, "1\n"); | |
152 | } | |
153 | ||
154 | static ssize_t set_temp_reset(struct i2c_client *client, struct fscpos_data | |
155 | *data, const char *buf, size_t count, int nr, int reg) | |
156 | { | |
157 | unsigned long v = simple_strtoul(buf, NULL, 10); | |
158 | if (v != 1) { | |
159 | dev_err(&client->dev, "temp_reset value %ld not supported. " | |
160 | "Use 1 to reset the alarm!\n", v); | |
161 | return -EINVAL; | |
162 | } | |
163 | ||
164 | dev_info(&client->dev, "You used the temp_reset feature which has not " | |
165 | "been proplerly tested. Please report your " | |
166 | "experience to the module author.\n"); | |
167 | ||
168 | /* Supported value: 2 (clears the status) */ | |
169 | fscpos_write_value(client, FSCPOS_REG_TEMP_STATE[nr], 2); | |
170 | return count; | |
171 | } | |
172 | ||
173 | /* Fans */ | |
174 | #define RPM_FROM_REG(val) ((val) * 60) | |
175 | ||
176 | static ssize_t show_fan_status(struct fscpos_data *data, char *buf, int nr) | |
177 | { | |
178 | /* bits 0..1, 3..7 reserved => mask with 0x04 */ | |
179 | return sprintf(buf, "%u\n", data->fan_status[nr - 1] & 0x04); | |
180 | } | |
181 | ||
182 | static ssize_t show_fan_input(struct fscpos_data *data, char *buf, int nr) | |
183 | { | |
184 | return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[nr - 1])); | |
185 | } | |
186 | ||
187 | static ssize_t show_fan_ripple(struct fscpos_data *data, char *buf, int nr) | |
188 | { | |
189 | /* bits 2..7 reserved => mask with 0x03 */ | |
190 | return sprintf(buf, "%u\n", data->fan_ripple[nr - 1] & 0x03); | |
191 | } | |
192 | ||
193 | static ssize_t set_fan_ripple(struct i2c_client *client, struct fscpos_data | |
194 | *data, const char *buf, size_t count, int nr, int reg) | |
195 | { | |
196 | /* supported values: 2, 4, 8 */ | |
197 | unsigned long v = simple_strtoul(buf, NULL, 10); | |
198 | ||
199 | switch (v) { | |
200 | case 2: v = 1; break; | |
201 | case 4: v = 2; break; | |
202 | case 8: v = 3; break; | |
203 | default: | |
204 | dev_err(&client->dev, "fan_ripple value %ld not supported. " | |
205 | "Must be one of 2, 4 or 8!\n", v); | |
206 | return -EINVAL; | |
207 | } | |
208 | ||
209 | down(&data->update_lock); | |
210 | /* bits 2..7 reserved => mask with 0x03 */ | |
211 | data->fan_ripple[nr - 1] &= ~0x03; | |
212 | data->fan_ripple[nr - 1] |= v; | |
213 | ||
214 | fscpos_write_value(client, reg, data->fan_ripple[nr - 1]); | |
215 | up(&data->update_lock); | |
216 | return count; | |
217 | } | |
218 | ||
219 | static ssize_t show_pwm(struct fscpos_data *data, char *buf, int nr) | |
220 | { | |
221 | return sprintf(buf, "%u\n", data->pwm[nr - 1]); | |
222 | } | |
223 | ||
224 | static ssize_t set_pwm(struct i2c_client *client, struct fscpos_data *data, | |
225 | const char *buf, size_t count, int nr, int reg) | |
226 | { | |
227 | unsigned long v = simple_strtoul(buf, NULL, 10); | |
228 | ||
229 | /* Range: 0..255 */ | |
230 | if (v < 0) v = 0; | |
231 | if (v > 255) v = 255; | |
232 | ||
233 | down(&data->update_lock); | |
234 | data->pwm[nr - 1] = v; | |
235 | fscpos_write_value(client, reg, data->pwm[nr - 1]); | |
236 | up(&data->update_lock); | |
237 | return count; | |
238 | } | |
239 | ||
240 | static void reset_fan_alarm(struct i2c_client *client, int nr) | |
241 | { | |
242 | fscpos_write_value(client, FSCPOS_REG_FAN_STATE[nr], 4); | |
243 | } | |
244 | ||
245 | /* Volts */ | |
246 | #define VOLT_FROM_REG(val, mult) ((val) * (mult) / 255) | |
247 | ||
30f74292 | 248 | static ssize_t show_volt_12(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
249 | { |
250 | struct fscpos_data *data = fscpos_update_device(dev); | |
251 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[0], 14200)); | |
252 | } | |
253 | ||
30f74292 | 254 | static ssize_t show_volt_5(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
255 | { |
256 | struct fscpos_data *data = fscpos_update_device(dev); | |
257 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[1], 6600)); | |
258 | } | |
259 | ||
30f74292 | 260 | static ssize_t show_volt_batt(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
261 | { |
262 | struct fscpos_data *data = fscpos_update_device(dev); | |
263 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[2], 3300)); | |
264 | } | |
265 | ||
266 | /* Watchdog */ | |
267 | static ssize_t show_wdog_control(struct fscpos_data *data, char *buf) | |
268 | { | |
269 | /* bits 0..3 reserved, bit 6 write only => mask with 0xb0 */ | |
270 | return sprintf(buf, "%u\n", data->wdog_control & 0xb0); | |
271 | } | |
272 | ||
273 | static ssize_t set_wdog_control(struct i2c_client *client, struct fscpos_data | |
274 | *data, const char *buf, size_t count, int reg) | |
275 | { | |
276 | /* bits 0..3 reserved => mask with 0xf0 */ | |
277 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0; | |
278 | ||
279 | down(&data->update_lock); | |
280 | data->wdog_control &= ~0xf0; | |
281 | data->wdog_control |= v; | |
282 | fscpos_write_value(client, reg, data->wdog_control); | |
283 | up(&data->update_lock); | |
284 | return count; | |
285 | } | |
286 | ||
287 | static ssize_t show_wdog_state(struct fscpos_data *data, char *buf) | |
288 | { | |
289 | /* bits 0, 2..7 reserved => mask with 0x02 */ | |
290 | return sprintf(buf, "%u\n", data->wdog_state & 0x02); | |
291 | } | |
292 | ||
293 | static ssize_t set_wdog_state(struct i2c_client *client, struct fscpos_data | |
294 | *data, const char *buf, size_t count, int reg) | |
295 | { | |
296 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02; | |
297 | ||
298 | /* Valid values: 2 (clear) */ | |
299 | if (v != 2) { | |
300 | dev_err(&client->dev, "wdog_state value %ld not supported. " | |
301 | "Must be 2 to clear the state!\n", v); | |
302 | return -EINVAL; | |
303 | } | |
304 | ||
305 | down(&data->update_lock); | |
306 | data->wdog_state &= ~v; | |
307 | fscpos_write_value(client, reg, v); | |
308 | up(&data->update_lock); | |
309 | return count; | |
310 | } | |
311 | ||
312 | static ssize_t show_wdog_preset(struct fscpos_data *data, char *buf) | |
313 | { | |
314 | return sprintf(buf, "%u\n", data->wdog_preset); | |
315 | } | |
316 | ||
317 | static ssize_t set_wdog_preset(struct i2c_client *client, struct fscpos_data | |
318 | *data, const char *buf, size_t count, int reg) | |
319 | { | |
320 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff; | |
321 | ||
322 | down(&data->update_lock); | |
323 | data->wdog_preset = v; | |
324 | fscpos_write_value(client, reg, data->wdog_preset); | |
325 | up(&data->update_lock); | |
326 | return count; | |
327 | } | |
328 | ||
329 | /* Event */ | |
30f74292 | 330 | static ssize_t show_event(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
331 | { |
332 | /* bits 5..7 reserved => mask with 0x1f */ | |
333 | struct fscpos_data *data = fscpos_update_device(dev); | |
334 | return sprintf(buf, "%u\n", data->global_event & 0x9b); | |
335 | } | |
336 | ||
337 | /* | |
338 | * Sysfs stuff | |
339 | */ | |
340 | #define create_getter(kind, sub) \ | |
30f74292 | 341 | static ssize_t sysfs_show_##kind##sub(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
342 | { \ |
343 | struct fscpos_data *data = fscpos_update_device(dev); \ | |
344 | return show_##kind##sub(data, buf); \ | |
345 | } | |
346 | ||
347 | #define create_getter_n(kind, offset, sub) \ | |
30f74292 | 348 | static ssize_t sysfs_show_##kind##offset##sub(struct device *dev, struct device_attribute *attr, char\ |
1da177e4 LT |
349 | *buf) \ |
350 | { \ | |
351 | struct fscpos_data *data = fscpos_update_device(dev); \ | |
352 | return show_##kind##sub(data, buf, offset); \ | |
353 | } | |
354 | ||
355 | #define create_setter(kind, sub, reg) \ | |
30f74292 | 356 | static ssize_t sysfs_set_##kind##sub (struct device *dev, struct device_attribute *attr, const char \ |
1da177e4 LT |
357 | *buf, size_t count) \ |
358 | { \ | |
359 | struct i2c_client *client = to_i2c_client(dev); \ | |
360 | struct fscpos_data *data = i2c_get_clientdata(client); \ | |
361 | return set_##kind##sub(client, data, buf, count, reg); \ | |
362 | } | |
363 | ||
364 | #define create_setter_n(kind, offset, sub, reg) \ | |
30f74292 | 365 | static ssize_t sysfs_set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
366 | const char *buf, size_t count) \ |
367 | { \ | |
368 | struct i2c_client *client = to_i2c_client(dev); \ | |
369 | struct fscpos_data *data = i2c_get_clientdata(client); \ | |
370 | return set_##kind##sub(client, data, buf, count, offset, reg);\ | |
371 | } | |
372 | ||
373 | #define create_sysfs_device_ro(kind, sub, offset) \ | |
374 | static DEVICE_ATTR(kind##offset##sub, S_IRUGO, \ | |
375 | sysfs_show_##kind##offset##sub, NULL); | |
376 | ||
377 | #define create_sysfs_device_rw(kind, sub, offset) \ | |
378 | static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, \ | |
379 | sysfs_show_##kind##offset##sub, sysfs_set_##kind##offset##sub); | |
380 | ||
381 | #define sysfs_ro_n(kind, sub, offset) \ | |
382 | create_getter_n(kind, offset, sub); \ | |
383 | create_sysfs_device_ro(kind, sub, offset); | |
384 | ||
385 | #define sysfs_rw_n(kind, sub, offset, reg) \ | |
386 | create_getter_n(kind, offset, sub); \ | |
387 | create_setter_n(kind, offset, sub, reg); \ | |
388 | create_sysfs_device_rw(kind, sub, offset); | |
389 | ||
390 | #define sysfs_rw(kind, sub, reg) \ | |
391 | create_getter(kind, sub); \ | |
392 | create_setter(kind, sub, reg); \ | |
393 | create_sysfs_device_rw(kind, sub,); | |
394 | ||
395 | #define sysfs_fan_with_min(offset, reg_status, reg_ripple, reg_min) \ | |
396 | sysfs_fan(offset, reg_status, reg_ripple); \ | |
397 | sysfs_rw_n(pwm,, offset, reg_min); | |
398 | ||
399 | #define sysfs_fan(offset, reg_status, reg_ripple) \ | |
400 | sysfs_ro_n(fan, _input, offset); \ | |
401 | sysfs_ro_n(fan, _status, offset); \ | |
402 | sysfs_rw_n(fan, _ripple, offset, reg_ripple); | |
403 | ||
404 | #define sysfs_temp(offset, reg_status) \ | |
405 | sysfs_ro_n(temp, _input, offset); \ | |
406 | sysfs_ro_n(temp, _status, offset); \ | |
407 | sysfs_rw_n(temp, _reset, offset, reg_status); | |
408 | ||
409 | #define sysfs_watchdog(reg_wdog_preset, reg_wdog_state, reg_wdog_control) \ | |
410 | sysfs_rw(wdog, _control, reg_wdog_control); \ | |
411 | sysfs_rw(wdog, _preset, reg_wdog_preset); \ | |
412 | sysfs_rw(wdog, _state, reg_wdog_state); | |
413 | ||
414 | sysfs_fan_with_min(1, FSCPOS_REG_FAN_STATE[0], FSCPOS_REG_FAN_RIPPLE[0], | |
415 | FSCPOS_REG_PWM[0]); | |
416 | sysfs_fan_with_min(2, FSCPOS_REG_FAN_STATE[1], FSCPOS_REG_FAN_RIPPLE[1], | |
417 | FSCPOS_REG_PWM[1]); | |
418 | sysfs_fan(3, FSCPOS_REG_FAN_STATE[2], FSCPOS_REG_FAN_RIPPLE[2]); | |
419 | ||
420 | sysfs_temp(1, FSCPOS_REG_TEMP_STATE[0]); | |
421 | sysfs_temp(2, FSCPOS_REG_TEMP_STATE[1]); | |
422 | sysfs_temp(3, FSCPOS_REG_TEMP_STATE[2]); | |
423 | ||
424 | sysfs_watchdog(FSCPOS_REG_WDOG_PRESET, FSCPOS_REG_WDOG_STATE, | |
425 | FSCPOS_REG_WDOG_CONTROL); | |
426 | ||
427 | static DEVICE_ATTR(event, S_IRUGO, show_event, NULL); | |
428 | static DEVICE_ATTR(in0_input, S_IRUGO, show_volt_12, NULL); | |
429 | static DEVICE_ATTR(in1_input, S_IRUGO, show_volt_5, NULL); | |
430 | static DEVICE_ATTR(in2_input, S_IRUGO, show_volt_batt, NULL); | |
431 | ||
432 | static int fscpos_attach_adapter(struct i2c_adapter *adapter) | |
433 | { | |
434 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
435 | return 0; | |
436 | return i2c_detect(adapter, &addr_data, fscpos_detect); | |
437 | } | |
438 | ||
439 | int fscpos_detect(struct i2c_adapter *adapter, int address, int kind) | |
440 | { | |
441 | struct i2c_client *new_client; | |
442 | struct fscpos_data *data; | |
443 | int err = 0; | |
444 | ||
445 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
446 | goto exit; | |
447 | ||
448 | /* | |
449 | * OK. For now, we presume we have a valid client. We now create the | |
450 | * client structure, even though we cannot fill it completely yet. | |
451 | * But it allows us to access fscpos_{read,write}_value. | |
452 | */ | |
453 | ||
454 | if (!(data = kmalloc(sizeof(struct fscpos_data), GFP_KERNEL))) { | |
455 | err = -ENOMEM; | |
456 | goto exit; | |
457 | } | |
458 | memset(data, 0, sizeof(struct fscpos_data)); | |
459 | ||
460 | new_client = &data->client; | |
461 | i2c_set_clientdata(new_client, data); | |
462 | new_client->addr = address; | |
463 | new_client->adapter = adapter; | |
464 | new_client->driver = &fscpos_driver; | |
465 | new_client->flags = 0; | |
466 | ||
467 | /* Do the remaining detection unless force or force_fscpos parameter */ | |
468 | if (kind < 0) { | |
469 | if ((fscpos_read_value(new_client, FSCPOS_REG_IDENT_0) | |
470 | != 0x50) /* 'P' */ | |
471 | || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_1) | |
472 | != 0x45) /* 'E' */ | |
473 | || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_2) | |
474 | != 0x47))/* 'G' */ | |
475 | { | |
476 | dev_dbg(&new_client->dev, "fscpos detection failed\n"); | |
477 | goto exit_free; | |
478 | } | |
479 | } | |
480 | ||
481 | /* Fill in the remaining client fields and put it in the global list */ | |
482 | strlcpy(new_client->name, "fscpos", I2C_NAME_SIZE); | |
483 | ||
484 | data->valid = 0; | |
485 | init_MUTEX(&data->update_lock); | |
486 | ||
487 | /* Tell the I2C layer a new client has arrived */ | |
488 | if ((err = i2c_attach_client(new_client))) | |
489 | goto exit_free; | |
490 | ||
491 | /* Inizialize the fscpos chip */ | |
492 | fscpos_init_client(new_client); | |
493 | ||
494 | /* Announce that the chip was found */ | |
495 | dev_info(&new_client->dev, "Found fscpos chip, rev %u\n", data->revision); | |
496 | ||
497 | /* Register sysfs hooks */ | |
498 | device_create_file(&new_client->dev, &dev_attr_event); | |
499 | device_create_file(&new_client->dev, &dev_attr_in0_input); | |
500 | device_create_file(&new_client->dev, &dev_attr_in1_input); | |
501 | device_create_file(&new_client->dev, &dev_attr_in2_input); | |
502 | device_create_file(&new_client->dev, &dev_attr_wdog_control); | |
503 | device_create_file(&new_client->dev, &dev_attr_wdog_preset); | |
504 | device_create_file(&new_client->dev, &dev_attr_wdog_state); | |
505 | device_create_file(&new_client->dev, &dev_attr_temp1_input); | |
506 | device_create_file(&new_client->dev, &dev_attr_temp1_status); | |
507 | device_create_file(&new_client->dev, &dev_attr_temp1_reset); | |
508 | device_create_file(&new_client->dev, &dev_attr_temp2_input); | |
509 | device_create_file(&new_client->dev, &dev_attr_temp2_status); | |
510 | device_create_file(&new_client->dev, &dev_attr_temp2_reset); | |
511 | device_create_file(&new_client->dev, &dev_attr_temp3_input); | |
512 | device_create_file(&new_client->dev, &dev_attr_temp3_status); | |
513 | device_create_file(&new_client->dev, &dev_attr_temp3_reset); | |
514 | device_create_file(&new_client->dev, &dev_attr_fan1_input); | |
515 | device_create_file(&new_client->dev, &dev_attr_fan1_status); | |
516 | device_create_file(&new_client->dev, &dev_attr_fan1_ripple); | |
517 | device_create_file(&new_client->dev, &dev_attr_pwm1); | |
518 | device_create_file(&new_client->dev, &dev_attr_fan2_input); | |
519 | device_create_file(&new_client->dev, &dev_attr_fan2_status); | |
520 | device_create_file(&new_client->dev, &dev_attr_fan2_ripple); | |
521 | device_create_file(&new_client->dev, &dev_attr_pwm2); | |
522 | device_create_file(&new_client->dev, &dev_attr_fan3_input); | |
523 | device_create_file(&new_client->dev, &dev_attr_fan3_status); | |
524 | device_create_file(&new_client->dev, &dev_attr_fan3_ripple); | |
525 | ||
526 | return 0; | |
527 | ||
528 | exit_free: | |
529 | kfree(data); | |
530 | exit: | |
531 | return err; | |
532 | } | |
533 | ||
534 | static int fscpos_detach_client(struct i2c_client *client) | |
535 | { | |
536 | int err; | |
537 | ||
538 | if ((err = i2c_detach_client(client))) { | |
539 | dev_err(&client->dev, "Client deregistration failed, client" | |
540 | " not detached.\n"); | |
541 | return err; | |
542 | } | |
543 | kfree(i2c_get_clientdata(client)); | |
544 | return 0; | |
545 | } | |
546 | ||
547 | static int fscpos_read_value(struct i2c_client *client, u8 reg) | |
548 | { | |
549 | dev_dbg(&client->dev, "Read reg 0x%02x\n", reg); | |
550 | return i2c_smbus_read_byte_data(client, reg); | |
551 | } | |
552 | ||
553 | static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value) | |
554 | { | |
555 | dev_dbg(&client->dev, "Write reg 0x%02x, val 0x%02x\n", reg, value); | |
556 | return i2c_smbus_write_byte_data(client, reg, value); | |
557 | } | |
558 | ||
559 | /* Called when we have found a new FSCPOS chip */ | |
560 | static void fscpos_init_client(struct i2c_client *client) | |
561 | { | |
562 | struct fscpos_data *data = i2c_get_clientdata(client); | |
563 | ||
564 | /* read revision from chip */ | |
565 | data->revision = fscpos_read_value(client, FSCPOS_REG_REVISION); | |
566 | } | |
567 | ||
568 | static struct fscpos_data *fscpos_update_device(struct device *dev) | |
569 | { | |
570 | struct i2c_client *client = to_i2c_client(dev); | |
571 | struct fscpos_data *data = i2c_get_clientdata(client); | |
572 | ||
573 | down(&data->update_lock); | |
574 | ||
575 | if ((jiffies - data->last_updated > 2 * HZ) || | |
576 | (jiffies < data->last_updated) || !data->valid) { | |
577 | int i; | |
578 | ||
579 | dev_dbg(&client->dev, "Starting fscpos update\n"); | |
580 | ||
581 | for (i = 0; i < 3; i++) { | |
582 | data->temp_act[i] = fscpos_read_value(client, | |
583 | FSCPOS_REG_TEMP_ACT[i]); | |
584 | data->temp_status[i] = fscpos_read_value(client, | |
585 | FSCPOS_REG_TEMP_STATE[i]); | |
586 | data->fan_act[i] = fscpos_read_value(client, | |
587 | FSCPOS_REG_FAN_ACT[i]); | |
588 | data->fan_status[i] = fscpos_read_value(client, | |
589 | FSCPOS_REG_FAN_STATE[i]); | |
590 | data->fan_ripple[i] = fscpos_read_value(client, | |
591 | FSCPOS_REG_FAN_RIPPLE[i]); | |
592 | if (i < 2) { | |
593 | /* fan2_min is not supported by the chip */ | |
594 | data->pwm[i] = fscpos_read_value(client, | |
595 | FSCPOS_REG_PWM[i]); | |
596 | } | |
597 | /* reset fan status if speed is back to > 0 */ | |
598 | if (data->fan_status[i] != 0 && data->fan_act[i] > 0) { | |
599 | reset_fan_alarm(client, i); | |
600 | } | |
601 | } | |
602 | ||
603 | data->volt[0] = fscpos_read_value(client, FSCPOS_REG_VOLT_12); | |
604 | data->volt[1] = fscpos_read_value(client, FSCPOS_REG_VOLT_5); | |
605 | data->volt[2] = fscpos_read_value(client, FSCPOS_REG_VOLT_BATT); | |
606 | ||
607 | data->wdog_preset = fscpos_read_value(client, | |
608 | FSCPOS_REG_WDOG_PRESET); | |
609 | data->wdog_state = fscpos_read_value(client, | |
610 | FSCPOS_REG_WDOG_STATE); | |
611 | data->wdog_control = fscpos_read_value(client, | |
612 | FSCPOS_REG_WDOG_CONTROL); | |
613 | ||
614 | data->global_event = fscpos_read_value(client, | |
615 | FSCPOS_REG_EVENT_STATE); | |
616 | ||
617 | data->last_updated = jiffies; | |
618 | data->valid = 1; | |
619 | } | |
620 | up(&data->update_lock); | |
621 | return data; | |
622 | } | |
623 | ||
624 | static int __init sm_fscpos_init(void) | |
625 | { | |
626 | return i2c_add_driver(&fscpos_driver); | |
627 | } | |
628 | ||
629 | static void __exit sm_fscpos_exit(void) | |
630 | { | |
631 | i2c_del_driver(&fscpos_driver); | |
632 | } | |
633 | ||
634 | MODULE_AUTHOR("Stefan Ott <stefan@desire.ch> based on work from Hermann Jung " | |
635 | "<hej@odn.de>, Frodo Looijaard <frodol@dds.nl>" | |
636 | " and Philip Edelbrock <phil@netroedge.com>"); | |
637 | MODULE_DESCRIPTION("fujitsu siemens poseidon chip driver"); | |
638 | MODULE_LICENSE("GPL"); | |
639 | ||
640 | module_init(sm_fscpos_init); | |
641 | module_exit(sm_fscpos_exit); |