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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> | |
0cacdf29 | 35 | #include <linux/jiffies.h> |
1da177e4 LT |
36 | #include <linux/i2c.h> |
37 | #include <linux/i2c-sensor.h> | |
38 | #include <linux/init.h> | |
39 | ||
40 | /* | |
41 | * Addresses to scan | |
42 | */ | |
43 | static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END }; | |
44 | static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END }; | |
45 | ||
46 | /* | |
47 | * Insmod parameters | |
48 | */ | |
49 | SENSORS_INSMOD_1(fscpos); | |
50 | ||
51 | /* | |
52 | * The FSCPOS registers | |
53 | */ | |
54 | ||
55 | /* chip identification */ | |
56 | #define FSCPOS_REG_IDENT_0 0x00 | |
57 | #define FSCPOS_REG_IDENT_1 0x01 | |
58 | #define FSCPOS_REG_IDENT_2 0x02 | |
59 | #define FSCPOS_REG_REVISION 0x03 | |
60 | ||
61 | /* global control and status */ | |
62 | #define FSCPOS_REG_EVENT_STATE 0x04 | |
63 | #define FSCPOS_REG_CONTROL 0x05 | |
64 | ||
65 | /* watchdog */ | |
66 | #define FSCPOS_REG_WDOG_PRESET 0x28 | |
67 | #define FSCPOS_REG_WDOG_STATE 0x23 | |
68 | #define FSCPOS_REG_WDOG_CONTROL 0x21 | |
69 | ||
70 | /* voltages */ | |
71 | #define FSCPOS_REG_VOLT_12 0x45 | |
72 | #define FSCPOS_REG_VOLT_5 0x42 | |
73 | #define FSCPOS_REG_VOLT_BATT 0x48 | |
74 | ||
75 | /* fans - the chip does not support minimum speed for fan2 */ | |
76 | static u8 FSCPOS_REG_PWM[] = { 0x55, 0x65 }; | |
77 | static u8 FSCPOS_REG_FAN_ACT[] = { 0x0e, 0x6b, 0xab }; | |
78 | static u8 FSCPOS_REG_FAN_STATE[] = { 0x0d, 0x62, 0xa2 }; | |
79 | static u8 FSCPOS_REG_FAN_RIPPLE[] = { 0x0f, 0x6f, 0xaf }; | |
80 | ||
81 | /* temperatures */ | |
82 | static u8 FSCPOS_REG_TEMP_ACT[] = { 0x64, 0x32, 0x35 }; | |
83 | static u8 FSCPOS_REG_TEMP_STATE[] = { 0x71, 0x81, 0x91 }; | |
84 | ||
85 | /* | |
86 | * Functions declaration | |
87 | */ | |
88 | static int fscpos_attach_adapter(struct i2c_adapter *adapter); | |
89 | static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind); | |
90 | static int fscpos_detach_client(struct i2c_client *client); | |
91 | ||
92 | static int fscpos_read_value(struct i2c_client *client, u8 register); | |
93 | static int fscpos_write_value(struct i2c_client *client, u8 register, u8 value); | |
94 | static struct fscpos_data *fscpos_update_device(struct device *dev); | |
95 | static void fscpos_init_client(struct i2c_client *client); | |
96 | ||
97 | static void reset_fan_alarm(struct i2c_client *client, int nr); | |
98 | ||
99 | /* | |
100 | * Driver data (common to all clients) | |
101 | */ | |
102 | static struct i2c_driver fscpos_driver = { | |
103 | .owner = THIS_MODULE, | |
104 | .name = "fscpos", | |
105 | .id = I2C_DRIVERID_FSCPOS, | |
106 | .flags = I2C_DF_NOTIFY, | |
107 | .attach_adapter = fscpos_attach_adapter, | |
108 | .detach_client = fscpos_detach_client, | |
109 | }; | |
110 | ||
111 | /* | |
112 | * Client data (each client gets its own) | |
113 | */ | |
114 | struct fscpos_data { | |
115 | struct i2c_client client; | |
116 | struct semaphore update_lock; | |
117 | char valid; /* 0 until following fields are valid */ | |
118 | unsigned long last_updated; /* In jiffies */ | |
119 | ||
120 | /* register values */ | |
121 | u8 revision; /* revision of chip */ | |
122 | u8 global_event; /* global event status */ | |
123 | u8 global_control; /* global control register */ | |
124 | u8 wdog_control; /* watchdog control */ | |
125 | u8 wdog_state; /* watchdog status */ | |
126 | u8 wdog_preset; /* watchdog preset */ | |
127 | u8 volt[3]; /* 12, 5, battery current */ | |
128 | u8 temp_act[3]; /* temperature */ | |
129 | u8 temp_status[3]; /* status of sensor */ | |
130 | u8 fan_act[3]; /* fans revolutions per second */ | |
131 | u8 fan_status[3]; /* fan status */ | |
132 | u8 pwm[2]; /* fan min value for rps */ | |
133 | u8 fan_ripple[3]; /* divider for rps */ | |
134 | }; | |
135 | ||
136 | /* Temperature */ | |
137 | #define TEMP_FROM_REG(val) (((val) - 128) * 1000) | |
138 | ||
139 | static ssize_t show_temp_input(struct fscpos_data *data, char *buf, int nr) | |
140 | { | |
141 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[nr - 1])); | |
142 | } | |
143 | ||
144 | static ssize_t show_temp_status(struct fscpos_data *data, char *buf, int nr) | |
145 | { | |
146 | /* bits 2..7 reserved => mask with 0x03 */ | |
147 | return sprintf(buf, "%u\n", data->temp_status[nr - 1] & 0x03); | |
148 | } | |
149 | ||
150 | static ssize_t show_temp_reset(struct fscpos_data *data, char *buf, int nr) | |
151 | { | |
152 | return sprintf(buf, "1\n"); | |
153 | } | |
154 | ||
155 | static ssize_t set_temp_reset(struct i2c_client *client, struct fscpos_data | |
156 | *data, const char *buf, size_t count, int nr, int reg) | |
157 | { | |
158 | unsigned long v = simple_strtoul(buf, NULL, 10); | |
159 | if (v != 1) { | |
160 | dev_err(&client->dev, "temp_reset value %ld not supported. " | |
161 | "Use 1 to reset the alarm!\n", v); | |
162 | return -EINVAL; | |
163 | } | |
164 | ||
165 | dev_info(&client->dev, "You used the temp_reset feature which has not " | |
166 | "been proplerly tested. Please report your " | |
167 | "experience to the module author.\n"); | |
168 | ||
169 | /* Supported value: 2 (clears the status) */ | |
170 | fscpos_write_value(client, FSCPOS_REG_TEMP_STATE[nr], 2); | |
171 | return count; | |
172 | } | |
173 | ||
174 | /* Fans */ | |
175 | #define RPM_FROM_REG(val) ((val) * 60) | |
176 | ||
177 | static ssize_t show_fan_status(struct fscpos_data *data, char *buf, int nr) | |
178 | { | |
179 | /* bits 0..1, 3..7 reserved => mask with 0x04 */ | |
180 | return sprintf(buf, "%u\n", data->fan_status[nr - 1] & 0x04); | |
181 | } | |
182 | ||
183 | static ssize_t show_fan_input(struct fscpos_data *data, char *buf, int nr) | |
184 | { | |
185 | return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[nr - 1])); | |
186 | } | |
187 | ||
188 | static ssize_t show_fan_ripple(struct fscpos_data *data, char *buf, int nr) | |
189 | { | |
190 | /* bits 2..7 reserved => mask with 0x03 */ | |
191 | return sprintf(buf, "%u\n", data->fan_ripple[nr - 1] & 0x03); | |
192 | } | |
193 | ||
194 | static ssize_t set_fan_ripple(struct i2c_client *client, struct fscpos_data | |
195 | *data, const char *buf, size_t count, int nr, int reg) | |
196 | { | |
197 | /* supported values: 2, 4, 8 */ | |
198 | unsigned long v = simple_strtoul(buf, NULL, 10); | |
199 | ||
200 | switch (v) { | |
201 | case 2: v = 1; break; | |
202 | case 4: v = 2; break; | |
203 | case 8: v = 3; break; | |
204 | default: | |
205 | dev_err(&client->dev, "fan_ripple value %ld not supported. " | |
206 | "Must be one of 2, 4 or 8!\n", v); | |
207 | return -EINVAL; | |
208 | } | |
209 | ||
210 | down(&data->update_lock); | |
211 | /* bits 2..7 reserved => mask with 0x03 */ | |
212 | data->fan_ripple[nr - 1] &= ~0x03; | |
213 | data->fan_ripple[nr - 1] |= v; | |
214 | ||
215 | fscpos_write_value(client, reg, data->fan_ripple[nr - 1]); | |
216 | up(&data->update_lock); | |
217 | return count; | |
218 | } | |
219 | ||
220 | static ssize_t show_pwm(struct fscpos_data *data, char *buf, int nr) | |
221 | { | |
222 | return sprintf(buf, "%u\n", data->pwm[nr - 1]); | |
223 | } | |
224 | ||
225 | static ssize_t set_pwm(struct i2c_client *client, struct fscpos_data *data, | |
226 | const char *buf, size_t count, int nr, int reg) | |
227 | { | |
228 | unsigned long v = simple_strtoul(buf, NULL, 10); | |
229 | ||
230 | /* Range: 0..255 */ | |
231 | if (v < 0) v = 0; | |
232 | if (v > 255) v = 255; | |
233 | ||
234 | down(&data->update_lock); | |
235 | data->pwm[nr - 1] = v; | |
236 | fscpos_write_value(client, reg, data->pwm[nr - 1]); | |
237 | up(&data->update_lock); | |
238 | return count; | |
239 | } | |
240 | ||
241 | static void reset_fan_alarm(struct i2c_client *client, int nr) | |
242 | { | |
243 | fscpos_write_value(client, FSCPOS_REG_FAN_STATE[nr], 4); | |
244 | } | |
245 | ||
246 | /* Volts */ | |
247 | #define VOLT_FROM_REG(val, mult) ((val) * (mult) / 255) | |
248 | ||
30f74292 | 249 | static ssize_t show_volt_12(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
250 | { |
251 | struct fscpos_data *data = fscpos_update_device(dev); | |
252 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[0], 14200)); | |
253 | } | |
254 | ||
30f74292 | 255 | static ssize_t show_volt_5(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
256 | { |
257 | struct fscpos_data *data = fscpos_update_device(dev); | |
258 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[1], 6600)); | |
259 | } | |
260 | ||
30f74292 | 261 | static ssize_t show_volt_batt(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
262 | { |
263 | struct fscpos_data *data = fscpos_update_device(dev); | |
264 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[2], 3300)); | |
265 | } | |
266 | ||
267 | /* Watchdog */ | |
268 | static ssize_t show_wdog_control(struct fscpos_data *data, char *buf) | |
269 | { | |
270 | /* bits 0..3 reserved, bit 6 write only => mask with 0xb0 */ | |
271 | return sprintf(buf, "%u\n", data->wdog_control & 0xb0); | |
272 | } | |
273 | ||
274 | static ssize_t set_wdog_control(struct i2c_client *client, struct fscpos_data | |
275 | *data, const char *buf, size_t count, int reg) | |
276 | { | |
277 | /* bits 0..3 reserved => mask with 0xf0 */ | |
278 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0; | |
279 | ||
280 | down(&data->update_lock); | |
281 | data->wdog_control &= ~0xf0; | |
282 | data->wdog_control |= v; | |
283 | fscpos_write_value(client, reg, data->wdog_control); | |
284 | up(&data->update_lock); | |
285 | return count; | |
286 | } | |
287 | ||
288 | static ssize_t show_wdog_state(struct fscpos_data *data, char *buf) | |
289 | { | |
290 | /* bits 0, 2..7 reserved => mask with 0x02 */ | |
291 | return sprintf(buf, "%u\n", data->wdog_state & 0x02); | |
292 | } | |
293 | ||
294 | static ssize_t set_wdog_state(struct i2c_client *client, struct fscpos_data | |
295 | *data, const char *buf, size_t count, int reg) | |
296 | { | |
297 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02; | |
298 | ||
299 | /* Valid values: 2 (clear) */ | |
300 | if (v != 2) { | |
301 | dev_err(&client->dev, "wdog_state value %ld not supported. " | |
302 | "Must be 2 to clear the state!\n", v); | |
303 | return -EINVAL; | |
304 | } | |
305 | ||
306 | down(&data->update_lock); | |
307 | data->wdog_state &= ~v; | |
308 | fscpos_write_value(client, reg, v); | |
309 | up(&data->update_lock); | |
310 | return count; | |
311 | } | |
312 | ||
313 | static ssize_t show_wdog_preset(struct fscpos_data *data, char *buf) | |
314 | { | |
315 | return sprintf(buf, "%u\n", data->wdog_preset); | |
316 | } | |
317 | ||
318 | static ssize_t set_wdog_preset(struct i2c_client *client, struct fscpos_data | |
319 | *data, const char *buf, size_t count, int reg) | |
320 | { | |
321 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff; | |
322 | ||
323 | down(&data->update_lock); | |
324 | data->wdog_preset = v; | |
325 | fscpos_write_value(client, reg, data->wdog_preset); | |
326 | up(&data->update_lock); | |
327 | return count; | |
328 | } | |
329 | ||
330 | /* Event */ | |
30f74292 | 331 | static ssize_t show_event(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
332 | { |
333 | /* bits 5..7 reserved => mask with 0x1f */ | |
334 | struct fscpos_data *data = fscpos_update_device(dev); | |
335 | return sprintf(buf, "%u\n", data->global_event & 0x9b); | |
336 | } | |
337 | ||
338 | /* | |
339 | * Sysfs stuff | |
340 | */ | |
341 | #define create_getter(kind, sub) \ | |
30f74292 | 342 | static ssize_t sysfs_show_##kind##sub(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
343 | { \ |
344 | struct fscpos_data *data = fscpos_update_device(dev); \ | |
345 | return show_##kind##sub(data, buf); \ | |
346 | } | |
347 | ||
348 | #define create_getter_n(kind, offset, sub) \ | |
30f74292 | 349 | static ssize_t sysfs_show_##kind##offset##sub(struct device *dev, struct device_attribute *attr, char\ |
1da177e4 LT |
350 | *buf) \ |
351 | { \ | |
352 | struct fscpos_data *data = fscpos_update_device(dev); \ | |
353 | return show_##kind##sub(data, buf, offset); \ | |
354 | } | |
355 | ||
356 | #define create_setter(kind, sub, reg) \ | |
30f74292 | 357 | static ssize_t sysfs_set_##kind##sub (struct device *dev, struct device_attribute *attr, const char \ |
1da177e4 LT |
358 | *buf, size_t count) \ |
359 | { \ | |
360 | struct i2c_client *client = to_i2c_client(dev); \ | |
361 | struct fscpos_data *data = i2c_get_clientdata(client); \ | |
362 | return set_##kind##sub(client, data, buf, count, reg); \ | |
363 | } | |
364 | ||
365 | #define create_setter_n(kind, offset, sub, reg) \ | |
30f74292 | 366 | static ssize_t sysfs_set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
367 | const char *buf, size_t count) \ |
368 | { \ | |
369 | struct i2c_client *client = to_i2c_client(dev); \ | |
370 | struct fscpos_data *data = i2c_get_clientdata(client); \ | |
371 | return set_##kind##sub(client, data, buf, count, offset, reg);\ | |
372 | } | |
373 | ||
374 | #define create_sysfs_device_ro(kind, sub, offset) \ | |
375 | static DEVICE_ATTR(kind##offset##sub, S_IRUGO, \ | |
376 | sysfs_show_##kind##offset##sub, NULL); | |
377 | ||
378 | #define create_sysfs_device_rw(kind, sub, offset) \ | |
379 | static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, \ | |
380 | sysfs_show_##kind##offset##sub, sysfs_set_##kind##offset##sub); | |
381 | ||
382 | #define sysfs_ro_n(kind, sub, offset) \ | |
383 | create_getter_n(kind, offset, sub); \ | |
384 | create_sysfs_device_ro(kind, sub, offset); | |
385 | ||
386 | #define sysfs_rw_n(kind, sub, offset, reg) \ | |
387 | create_getter_n(kind, offset, sub); \ | |
388 | create_setter_n(kind, offset, sub, reg); \ | |
389 | create_sysfs_device_rw(kind, sub, offset); | |
390 | ||
391 | #define sysfs_rw(kind, sub, reg) \ | |
392 | create_getter(kind, sub); \ | |
393 | create_setter(kind, sub, reg); \ | |
394 | create_sysfs_device_rw(kind, sub,); | |
395 | ||
396 | #define sysfs_fan_with_min(offset, reg_status, reg_ripple, reg_min) \ | |
397 | sysfs_fan(offset, reg_status, reg_ripple); \ | |
398 | sysfs_rw_n(pwm,, offset, reg_min); | |
399 | ||
400 | #define sysfs_fan(offset, reg_status, reg_ripple) \ | |
401 | sysfs_ro_n(fan, _input, offset); \ | |
402 | sysfs_ro_n(fan, _status, offset); \ | |
403 | sysfs_rw_n(fan, _ripple, offset, reg_ripple); | |
404 | ||
405 | #define sysfs_temp(offset, reg_status) \ | |
406 | sysfs_ro_n(temp, _input, offset); \ | |
407 | sysfs_ro_n(temp, _status, offset); \ | |
408 | sysfs_rw_n(temp, _reset, offset, reg_status); | |
409 | ||
410 | #define sysfs_watchdog(reg_wdog_preset, reg_wdog_state, reg_wdog_control) \ | |
411 | sysfs_rw(wdog, _control, reg_wdog_control); \ | |
412 | sysfs_rw(wdog, _preset, reg_wdog_preset); \ | |
413 | sysfs_rw(wdog, _state, reg_wdog_state); | |
414 | ||
415 | sysfs_fan_with_min(1, FSCPOS_REG_FAN_STATE[0], FSCPOS_REG_FAN_RIPPLE[0], | |
416 | FSCPOS_REG_PWM[0]); | |
417 | sysfs_fan_with_min(2, FSCPOS_REG_FAN_STATE[1], FSCPOS_REG_FAN_RIPPLE[1], | |
418 | FSCPOS_REG_PWM[1]); | |
419 | sysfs_fan(3, FSCPOS_REG_FAN_STATE[2], FSCPOS_REG_FAN_RIPPLE[2]); | |
420 | ||
421 | sysfs_temp(1, FSCPOS_REG_TEMP_STATE[0]); | |
422 | sysfs_temp(2, FSCPOS_REG_TEMP_STATE[1]); | |
423 | sysfs_temp(3, FSCPOS_REG_TEMP_STATE[2]); | |
424 | ||
425 | sysfs_watchdog(FSCPOS_REG_WDOG_PRESET, FSCPOS_REG_WDOG_STATE, | |
426 | FSCPOS_REG_WDOG_CONTROL); | |
427 | ||
428 | static DEVICE_ATTR(event, S_IRUGO, show_event, NULL); | |
429 | static DEVICE_ATTR(in0_input, S_IRUGO, show_volt_12, NULL); | |
430 | static DEVICE_ATTR(in1_input, S_IRUGO, show_volt_5, NULL); | |
431 | static DEVICE_ATTR(in2_input, S_IRUGO, show_volt_batt, NULL); | |
432 | ||
433 | static int fscpos_attach_adapter(struct i2c_adapter *adapter) | |
434 | { | |
435 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
436 | return 0; | |
437 | return i2c_detect(adapter, &addr_data, fscpos_detect); | |
438 | } | |
439 | ||
440 | int fscpos_detect(struct i2c_adapter *adapter, int address, int kind) | |
441 | { | |
442 | struct i2c_client *new_client; | |
443 | struct fscpos_data *data; | |
444 | int err = 0; | |
445 | ||
446 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
447 | goto exit; | |
448 | ||
449 | /* | |
450 | * OK. For now, we presume we have a valid client. We now create the | |
451 | * client structure, even though we cannot fill it completely yet. | |
452 | * But it allows us to access fscpos_{read,write}_value. | |
453 | */ | |
454 | ||
455 | if (!(data = kmalloc(sizeof(struct fscpos_data), GFP_KERNEL))) { | |
456 | err = -ENOMEM; | |
457 | goto exit; | |
458 | } | |
459 | memset(data, 0, sizeof(struct fscpos_data)); | |
460 | ||
461 | new_client = &data->client; | |
462 | i2c_set_clientdata(new_client, data); | |
463 | new_client->addr = address; | |
464 | new_client->adapter = adapter; | |
465 | new_client->driver = &fscpos_driver; | |
466 | new_client->flags = 0; | |
467 | ||
468 | /* Do the remaining detection unless force or force_fscpos parameter */ | |
469 | if (kind < 0) { | |
470 | if ((fscpos_read_value(new_client, FSCPOS_REG_IDENT_0) | |
471 | != 0x50) /* 'P' */ | |
472 | || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_1) | |
473 | != 0x45) /* 'E' */ | |
474 | || (fscpos_read_value(new_client, FSCPOS_REG_IDENT_2) | |
475 | != 0x47))/* 'G' */ | |
476 | { | |
477 | dev_dbg(&new_client->dev, "fscpos detection failed\n"); | |
478 | goto exit_free; | |
479 | } | |
480 | } | |
481 | ||
482 | /* Fill in the remaining client fields and put it in the global list */ | |
483 | strlcpy(new_client->name, "fscpos", I2C_NAME_SIZE); | |
484 | ||
485 | data->valid = 0; | |
486 | init_MUTEX(&data->update_lock); | |
487 | ||
488 | /* Tell the I2C layer a new client has arrived */ | |
489 | if ((err = i2c_attach_client(new_client))) | |
490 | goto exit_free; | |
491 | ||
492 | /* Inizialize the fscpos chip */ | |
493 | fscpos_init_client(new_client); | |
494 | ||
495 | /* Announce that the chip was found */ | |
496 | dev_info(&new_client->dev, "Found fscpos chip, rev %u\n", data->revision); | |
497 | ||
498 | /* Register sysfs hooks */ | |
499 | device_create_file(&new_client->dev, &dev_attr_event); | |
500 | device_create_file(&new_client->dev, &dev_attr_in0_input); | |
501 | device_create_file(&new_client->dev, &dev_attr_in1_input); | |
502 | device_create_file(&new_client->dev, &dev_attr_in2_input); | |
503 | device_create_file(&new_client->dev, &dev_attr_wdog_control); | |
504 | device_create_file(&new_client->dev, &dev_attr_wdog_preset); | |
505 | device_create_file(&new_client->dev, &dev_attr_wdog_state); | |
506 | device_create_file(&new_client->dev, &dev_attr_temp1_input); | |
507 | device_create_file(&new_client->dev, &dev_attr_temp1_status); | |
508 | device_create_file(&new_client->dev, &dev_attr_temp1_reset); | |
509 | device_create_file(&new_client->dev, &dev_attr_temp2_input); | |
510 | device_create_file(&new_client->dev, &dev_attr_temp2_status); | |
511 | device_create_file(&new_client->dev, &dev_attr_temp2_reset); | |
512 | device_create_file(&new_client->dev, &dev_attr_temp3_input); | |
513 | device_create_file(&new_client->dev, &dev_attr_temp3_status); | |
514 | device_create_file(&new_client->dev, &dev_attr_temp3_reset); | |
515 | device_create_file(&new_client->dev, &dev_attr_fan1_input); | |
516 | device_create_file(&new_client->dev, &dev_attr_fan1_status); | |
517 | device_create_file(&new_client->dev, &dev_attr_fan1_ripple); | |
518 | device_create_file(&new_client->dev, &dev_attr_pwm1); | |
519 | device_create_file(&new_client->dev, &dev_attr_fan2_input); | |
520 | device_create_file(&new_client->dev, &dev_attr_fan2_status); | |
521 | device_create_file(&new_client->dev, &dev_attr_fan2_ripple); | |
522 | device_create_file(&new_client->dev, &dev_attr_pwm2); | |
523 | device_create_file(&new_client->dev, &dev_attr_fan3_input); | |
524 | device_create_file(&new_client->dev, &dev_attr_fan3_status); | |
525 | device_create_file(&new_client->dev, &dev_attr_fan3_ripple); | |
526 | ||
527 | return 0; | |
528 | ||
529 | exit_free: | |
530 | kfree(data); | |
531 | exit: | |
532 | return err; | |
533 | } | |
534 | ||
535 | static int fscpos_detach_client(struct i2c_client *client) | |
536 | { | |
537 | int err; | |
538 | ||
539 | if ((err = i2c_detach_client(client))) { | |
540 | dev_err(&client->dev, "Client deregistration failed, client" | |
541 | " not detached.\n"); | |
542 | return err; | |
543 | } | |
544 | kfree(i2c_get_clientdata(client)); | |
545 | return 0; | |
546 | } | |
547 | ||
548 | static int fscpos_read_value(struct i2c_client *client, u8 reg) | |
549 | { | |
550 | dev_dbg(&client->dev, "Read reg 0x%02x\n", reg); | |
551 | return i2c_smbus_read_byte_data(client, reg); | |
552 | } | |
553 | ||
554 | static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value) | |
555 | { | |
556 | dev_dbg(&client->dev, "Write reg 0x%02x, val 0x%02x\n", reg, value); | |
557 | return i2c_smbus_write_byte_data(client, reg, value); | |
558 | } | |
559 | ||
560 | /* Called when we have found a new FSCPOS chip */ | |
561 | static void fscpos_init_client(struct i2c_client *client) | |
562 | { | |
563 | struct fscpos_data *data = i2c_get_clientdata(client); | |
564 | ||
565 | /* read revision from chip */ | |
566 | data->revision = fscpos_read_value(client, FSCPOS_REG_REVISION); | |
567 | } | |
568 | ||
569 | static struct fscpos_data *fscpos_update_device(struct device *dev) | |
570 | { | |
571 | struct i2c_client *client = to_i2c_client(dev); | |
572 | struct fscpos_data *data = i2c_get_clientdata(client); | |
573 | ||
574 | down(&data->update_lock); | |
575 | ||
0cacdf29 | 576 | if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { |
1da177e4 LT |
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); |