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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 | 36 | #include <linux/i2c.h> |
1da177e4 | 37 | #include <linux/init.h> |
943b0830 MH |
38 | #include <linux/hwmon.h> |
39 | #include <linux/err.h> | |
1da177e4 LT |
40 | |
41 | /* | |
42 | * Addresses to scan | |
43 | */ | |
44 | static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END }; | |
1da177e4 LT |
45 | |
46 | /* | |
47 | * Insmod parameters | |
48 | */ | |
f4b50261 | 49 | I2C_CLIENT_INSMOD_1(fscpos); |
1da177e4 LT |
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 = { | |
cdaf7934 | 103 | .driver = { |
cdaf7934 LR |
104 | .name = "fscpos", |
105 | }, | |
1da177e4 | 106 | .id = I2C_DRIVERID_FSCPOS, |
1da177e4 LT |
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; | |
943b0830 | 116 | struct class_device *class_dev; |
1da177e4 LT |
117 | struct semaphore update_lock; |
118 | char valid; /* 0 until following fields are valid */ | |
119 | unsigned long last_updated; /* In jiffies */ | |
120 | ||
121 | /* register values */ | |
122 | u8 revision; /* revision of chip */ | |
123 | u8 global_event; /* global event status */ | |
124 | u8 global_control; /* global control register */ | |
125 | u8 wdog_control; /* watchdog control */ | |
126 | u8 wdog_state; /* watchdog status */ | |
127 | u8 wdog_preset; /* watchdog preset */ | |
128 | u8 volt[3]; /* 12, 5, battery current */ | |
129 | u8 temp_act[3]; /* temperature */ | |
130 | u8 temp_status[3]; /* status of sensor */ | |
131 | u8 fan_act[3]; /* fans revolutions per second */ | |
132 | u8 fan_status[3]; /* fan status */ | |
133 | u8 pwm[2]; /* fan min value for rps */ | |
134 | u8 fan_ripple[3]; /* divider for rps */ | |
135 | }; | |
136 | ||
137 | /* Temperature */ | |
138 | #define TEMP_FROM_REG(val) (((val) - 128) * 1000) | |
139 | ||
140 | static ssize_t show_temp_input(struct fscpos_data *data, char *buf, int nr) | |
141 | { | |
142 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[nr - 1])); | |
143 | } | |
144 | ||
145 | static ssize_t show_temp_status(struct fscpos_data *data, char *buf, int nr) | |
146 | { | |
147 | /* bits 2..7 reserved => mask with 0x03 */ | |
148 | return sprintf(buf, "%u\n", data->temp_status[nr - 1] & 0x03); | |
149 | } | |
150 | ||
151 | static ssize_t show_temp_reset(struct fscpos_data *data, char *buf, int nr) | |
152 | { | |
153 | return sprintf(buf, "1\n"); | |
154 | } | |
155 | ||
156 | static ssize_t set_temp_reset(struct i2c_client *client, struct fscpos_data | |
157 | *data, const char *buf, size_t count, int nr, int reg) | |
158 | { | |
159 | unsigned long v = simple_strtoul(buf, NULL, 10); | |
160 | if (v != 1) { | |
161 | dev_err(&client->dev, "temp_reset value %ld not supported. " | |
162 | "Use 1 to reset the alarm!\n", v); | |
163 | return -EINVAL; | |
164 | } | |
165 | ||
166 | dev_info(&client->dev, "You used the temp_reset feature which has not " | |
167 | "been proplerly tested. Please report your " | |
168 | "experience to the module author.\n"); | |
169 | ||
170 | /* Supported value: 2 (clears the status) */ | |
3fd1bb9b | 171 | fscpos_write_value(client, FSCPOS_REG_TEMP_STATE[nr - 1], 2); |
1da177e4 LT |
172 | return count; |
173 | } | |
174 | ||
175 | /* Fans */ | |
176 | #define RPM_FROM_REG(val) ((val) * 60) | |
177 | ||
178 | static ssize_t show_fan_status(struct fscpos_data *data, char *buf, int nr) | |
179 | { | |
180 | /* bits 0..1, 3..7 reserved => mask with 0x04 */ | |
181 | return sprintf(buf, "%u\n", data->fan_status[nr - 1] & 0x04); | |
182 | } | |
183 | ||
184 | static ssize_t show_fan_input(struct fscpos_data *data, char *buf, int nr) | |
185 | { | |
186 | return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[nr - 1])); | |
187 | } | |
188 | ||
189 | static ssize_t show_fan_ripple(struct fscpos_data *data, char *buf, int nr) | |
190 | { | |
191 | /* bits 2..7 reserved => mask with 0x03 */ | |
192 | return sprintf(buf, "%u\n", data->fan_ripple[nr - 1] & 0x03); | |
193 | } | |
194 | ||
195 | static ssize_t set_fan_ripple(struct i2c_client *client, struct fscpos_data | |
196 | *data, const char *buf, size_t count, int nr, int reg) | |
197 | { | |
198 | /* supported values: 2, 4, 8 */ | |
199 | unsigned long v = simple_strtoul(buf, NULL, 10); | |
200 | ||
201 | switch (v) { | |
202 | case 2: v = 1; break; | |
203 | case 4: v = 2; break; | |
204 | case 8: v = 3; break; | |
205 | default: | |
206 | dev_err(&client->dev, "fan_ripple value %ld not supported. " | |
207 | "Must be one of 2, 4 or 8!\n", v); | |
208 | return -EINVAL; | |
209 | } | |
210 | ||
211 | down(&data->update_lock); | |
212 | /* bits 2..7 reserved => mask with 0x03 */ | |
213 | data->fan_ripple[nr - 1] &= ~0x03; | |
214 | data->fan_ripple[nr - 1] |= v; | |
215 | ||
216 | fscpos_write_value(client, reg, data->fan_ripple[nr - 1]); | |
217 | up(&data->update_lock); | |
218 | return count; | |
219 | } | |
220 | ||
221 | static ssize_t show_pwm(struct fscpos_data *data, char *buf, int nr) | |
222 | { | |
223 | return sprintf(buf, "%u\n", data->pwm[nr - 1]); | |
224 | } | |
225 | ||
226 | static ssize_t set_pwm(struct i2c_client *client, struct fscpos_data *data, | |
227 | const char *buf, size_t count, int nr, int reg) | |
228 | { | |
229 | unsigned long v = simple_strtoul(buf, NULL, 10); | |
230 | ||
231 | /* Range: 0..255 */ | |
232 | if (v < 0) v = 0; | |
233 | if (v > 255) v = 255; | |
234 | ||
235 | down(&data->update_lock); | |
236 | data->pwm[nr - 1] = v; | |
237 | fscpos_write_value(client, reg, data->pwm[nr - 1]); | |
238 | up(&data->update_lock); | |
239 | return count; | |
240 | } | |
241 | ||
242 | static void reset_fan_alarm(struct i2c_client *client, int nr) | |
243 | { | |
244 | fscpos_write_value(client, FSCPOS_REG_FAN_STATE[nr], 4); | |
245 | } | |
246 | ||
247 | /* Volts */ | |
248 | #define VOLT_FROM_REG(val, mult) ((val) * (mult) / 255) | |
249 | ||
30f74292 | 250 | static ssize_t show_volt_12(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
251 | { |
252 | struct fscpos_data *data = fscpos_update_device(dev); | |
253 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[0], 14200)); | |
254 | } | |
255 | ||
30f74292 | 256 | static ssize_t show_volt_5(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
257 | { |
258 | struct fscpos_data *data = fscpos_update_device(dev); | |
259 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[1], 6600)); | |
260 | } | |
261 | ||
30f74292 | 262 | static ssize_t show_volt_batt(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
263 | { |
264 | struct fscpos_data *data = fscpos_update_device(dev); | |
265 | return sprintf(buf, "%u\n", VOLT_FROM_REG(data->volt[2], 3300)); | |
266 | } | |
267 | ||
268 | /* Watchdog */ | |
269 | static ssize_t show_wdog_control(struct fscpos_data *data, char *buf) | |
270 | { | |
271 | /* bits 0..3 reserved, bit 6 write only => mask with 0xb0 */ | |
272 | return sprintf(buf, "%u\n", data->wdog_control & 0xb0); | |
273 | } | |
274 | ||
275 | static ssize_t set_wdog_control(struct i2c_client *client, struct fscpos_data | |
276 | *data, const char *buf, size_t count, int reg) | |
277 | { | |
278 | /* bits 0..3 reserved => mask with 0xf0 */ | |
279 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0xf0; | |
280 | ||
281 | down(&data->update_lock); | |
282 | data->wdog_control &= ~0xf0; | |
283 | data->wdog_control |= v; | |
284 | fscpos_write_value(client, reg, data->wdog_control); | |
285 | up(&data->update_lock); | |
286 | return count; | |
287 | } | |
288 | ||
289 | static ssize_t show_wdog_state(struct fscpos_data *data, char *buf) | |
290 | { | |
291 | /* bits 0, 2..7 reserved => mask with 0x02 */ | |
292 | return sprintf(buf, "%u\n", data->wdog_state & 0x02); | |
293 | } | |
294 | ||
295 | static ssize_t set_wdog_state(struct i2c_client *client, struct fscpos_data | |
296 | *data, const char *buf, size_t count, int reg) | |
297 | { | |
298 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0x02; | |
299 | ||
300 | /* Valid values: 2 (clear) */ | |
301 | if (v != 2) { | |
302 | dev_err(&client->dev, "wdog_state value %ld not supported. " | |
303 | "Must be 2 to clear the state!\n", v); | |
304 | return -EINVAL; | |
305 | } | |
306 | ||
307 | down(&data->update_lock); | |
308 | data->wdog_state &= ~v; | |
309 | fscpos_write_value(client, reg, v); | |
310 | up(&data->update_lock); | |
311 | return count; | |
312 | } | |
313 | ||
314 | static ssize_t show_wdog_preset(struct fscpos_data *data, char *buf) | |
315 | { | |
316 | return sprintf(buf, "%u\n", data->wdog_preset); | |
317 | } | |
318 | ||
319 | static ssize_t set_wdog_preset(struct i2c_client *client, struct fscpos_data | |
320 | *data, const char *buf, size_t count, int reg) | |
321 | { | |
322 | unsigned long v = simple_strtoul(buf, NULL, 10) & 0xff; | |
323 | ||
324 | down(&data->update_lock); | |
325 | data->wdog_preset = v; | |
326 | fscpos_write_value(client, reg, data->wdog_preset); | |
327 | up(&data->update_lock); | |
328 | return count; | |
329 | } | |
330 | ||
331 | /* Event */ | |
30f74292 | 332 | static ssize_t show_event(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
333 | { |
334 | /* bits 5..7 reserved => mask with 0x1f */ | |
335 | struct fscpos_data *data = fscpos_update_device(dev); | |
336 | return sprintf(buf, "%u\n", data->global_event & 0x9b); | |
337 | } | |
338 | ||
339 | /* | |
340 | * Sysfs stuff | |
341 | */ | |
342 | #define create_getter(kind, sub) \ | |
30f74292 | 343 | static ssize_t sysfs_show_##kind##sub(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
344 | { \ |
345 | struct fscpos_data *data = fscpos_update_device(dev); \ | |
346 | return show_##kind##sub(data, buf); \ | |
347 | } | |
348 | ||
349 | #define create_getter_n(kind, offset, sub) \ | |
30f74292 | 350 | static ssize_t sysfs_show_##kind##offset##sub(struct device *dev, struct device_attribute *attr, char\ |
1da177e4 LT |
351 | *buf) \ |
352 | { \ | |
353 | struct fscpos_data *data = fscpos_update_device(dev); \ | |
354 | return show_##kind##sub(data, buf, offset); \ | |
355 | } | |
356 | ||
357 | #define create_setter(kind, sub, reg) \ | |
30f74292 | 358 | static ssize_t sysfs_set_##kind##sub (struct device *dev, struct device_attribute *attr, const char \ |
1da177e4 LT |
359 | *buf, size_t count) \ |
360 | { \ | |
361 | struct i2c_client *client = to_i2c_client(dev); \ | |
362 | struct fscpos_data *data = i2c_get_clientdata(client); \ | |
363 | return set_##kind##sub(client, data, buf, count, reg); \ | |
364 | } | |
365 | ||
366 | #define create_setter_n(kind, offset, sub, reg) \ | |
30f74292 | 367 | static ssize_t sysfs_set_##kind##offset##sub (struct device *dev, struct device_attribute *attr, \ |
1da177e4 LT |
368 | const char *buf, size_t count) \ |
369 | { \ | |
370 | struct i2c_client *client = to_i2c_client(dev); \ | |
371 | struct fscpos_data *data = i2c_get_clientdata(client); \ | |
372 | return set_##kind##sub(client, data, buf, count, offset, reg);\ | |
373 | } | |
374 | ||
375 | #define create_sysfs_device_ro(kind, sub, offset) \ | |
376 | static DEVICE_ATTR(kind##offset##sub, S_IRUGO, \ | |
377 | sysfs_show_##kind##offset##sub, NULL); | |
378 | ||
379 | #define create_sysfs_device_rw(kind, sub, offset) \ | |
380 | static DEVICE_ATTR(kind##offset##sub, S_IRUGO | S_IWUSR, \ | |
381 | sysfs_show_##kind##offset##sub, sysfs_set_##kind##offset##sub); | |
382 | ||
383 | #define sysfs_ro_n(kind, sub, offset) \ | |
384 | create_getter_n(kind, offset, sub); \ | |
385 | create_sysfs_device_ro(kind, sub, offset); | |
386 | ||
387 | #define sysfs_rw_n(kind, sub, offset, reg) \ | |
388 | create_getter_n(kind, offset, sub); \ | |
389 | create_setter_n(kind, offset, sub, reg); \ | |
390 | create_sysfs_device_rw(kind, sub, offset); | |
391 | ||
392 | #define sysfs_rw(kind, sub, reg) \ | |
393 | create_getter(kind, sub); \ | |
394 | create_setter(kind, sub, reg); \ | |
395 | create_sysfs_device_rw(kind, sub,); | |
396 | ||
397 | #define sysfs_fan_with_min(offset, reg_status, reg_ripple, reg_min) \ | |
398 | sysfs_fan(offset, reg_status, reg_ripple); \ | |
399 | sysfs_rw_n(pwm,, offset, reg_min); | |
400 | ||
401 | #define sysfs_fan(offset, reg_status, reg_ripple) \ | |
402 | sysfs_ro_n(fan, _input, offset); \ | |
403 | sysfs_ro_n(fan, _status, offset); \ | |
404 | sysfs_rw_n(fan, _ripple, offset, reg_ripple); | |
405 | ||
406 | #define sysfs_temp(offset, reg_status) \ | |
407 | sysfs_ro_n(temp, _input, offset); \ | |
408 | sysfs_ro_n(temp, _status, offset); \ | |
409 | sysfs_rw_n(temp, _reset, offset, reg_status); | |
410 | ||
411 | #define sysfs_watchdog(reg_wdog_preset, reg_wdog_state, reg_wdog_control) \ | |
412 | sysfs_rw(wdog, _control, reg_wdog_control); \ | |
413 | sysfs_rw(wdog, _preset, reg_wdog_preset); \ | |
414 | sysfs_rw(wdog, _state, reg_wdog_state); | |
415 | ||
416 | sysfs_fan_with_min(1, FSCPOS_REG_FAN_STATE[0], FSCPOS_REG_FAN_RIPPLE[0], | |
417 | FSCPOS_REG_PWM[0]); | |
418 | sysfs_fan_with_min(2, FSCPOS_REG_FAN_STATE[1], FSCPOS_REG_FAN_RIPPLE[1], | |
419 | FSCPOS_REG_PWM[1]); | |
420 | sysfs_fan(3, FSCPOS_REG_FAN_STATE[2], FSCPOS_REG_FAN_RIPPLE[2]); | |
421 | ||
422 | sysfs_temp(1, FSCPOS_REG_TEMP_STATE[0]); | |
423 | sysfs_temp(2, FSCPOS_REG_TEMP_STATE[1]); | |
424 | sysfs_temp(3, FSCPOS_REG_TEMP_STATE[2]); | |
425 | ||
426 | sysfs_watchdog(FSCPOS_REG_WDOG_PRESET, FSCPOS_REG_WDOG_STATE, | |
427 | FSCPOS_REG_WDOG_CONTROL); | |
428 | ||
429 | static DEVICE_ATTR(event, S_IRUGO, show_event, NULL); | |
430 | static DEVICE_ATTR(in0_input, S_IRUGO, show_volt_12, NULL); | |
431 | static DEVICE_ATTR(in1_input, S_IRUGO, show_volt_5, NULL); | |
432 | static DEVICE_ATTR(in2_input, S_IRUGO, show_volt_batt, NULL); | |
433 | ||
434 | static int fscpos_attach_adapter(struct i2c_adapter *adapter) | |
435 | { | |
436 | if (!(adapter->class & I2C_CLASS_HWMON)) | |
437 | return 0; | |
2ed2dc3c | 438 | return i2c_probe(adapter, &addr_data, fscpos_detect); |
1da177e4 LT |
439 | } |
440 | ||
c49efcef | 441 | static int fscpos_detect(struct i2c_adapter *adapter, int address, int kind) |
1da177e4 LT |
442 | { |
443 | struct i2c_client *new_client; | |
444 | struct fscpos_data *data; | |
445 | int err = 0; | |
446 | ||
447 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
448 | goto exit; | |
449 | ||
450 | /* | |
451 | * OK. For now, we presume we have a valid client. We now create the | |
452 | * client structure, even though we cannot fill it completely yet. | |
453 | * But it allows us to access fscpos_{read,write}_value. | |
454 | */ | |
455 | ||
ba9c2e8d | 456 | if (!(data = kzalloc(sizeof(struct fscpos_data), GFP_KERNEL))) { |
1da177e4 LT |
457 | err = -ENOMEM; |
458 | goto exit; | |
459 | } | |
1da177e4 LT |
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 */ | |
943b0830 MH |
499 | data->class_dev = hwmon_device_register(&new_client->dev); |
500 | if (IS_ERR(data->class_dev)) { | |
501 | err = PTR_ERR(data->class_dev); | |
502 | goto exit_detach; | |
503 | } | |
504 | ||
1da177e4 LT |
505 | device_create_file(&new_client->dev, &dev_attr_event); |
506 | device_create_file(&new_client->dev, &dev_attr_in0_input); | |
507 | device_create_file(&new_client->dev, &dev_attr_in1_input); | |
508 | device_create_file(&new_client->dev, &dev_attr_in2_input); | |
509 | device_create_file(&new_client->dev, &dev_attr_wdog_control); | |
510 | device_create_file(&new_client->dev, &dev_attr_wdog_preset); | |
511 | device_create_file(&new_client->dev, &dev_attr_wdog_state); | |
512 | device_create_file(&new_client->dev, &dev_attr_temp1_input); | |
513 | device_create_file(&new_client->dev, &dev_attr_temp1_status); | |
514 | device_create_file(&new_client->dev, &dev_attr_temp1_reset); | |
515 | device_create_file(&new_client->dev, &dev_attr_temp2_input); | |
516 | device_create_file(&new_client->dev, &dev_attr_temp2_status); | |
517 | device_create_file(&new_client->dev, &dev_attr_temp2_reset); | |
518 | device_create_file(&new_client->dev, &dev_attr_temp3_input); | |
519 | device_create_file(&new_client->dev, &dev_attr_temp3_status); | |
520 | device_create_file(&new_client->dev, &dev_attr_temp3_reset); | |
521 | device_create_file(&new_client->dev, &dev_attr_fan1_input); | |
522 | device_create_file(&new_client->dev, &dev_attr_fan1_status); | |
523 | device_create_file(&new_client->dev, &dev_attr_fan1_ripple); | |
524 | device_create_file(&new_client->dev, &dev_attr_pwm1); | |
525 | device_create_file(&new_client->dev, &dev_attr_fan2_input); | |
526 | device_create_file(&new_client->dev, &dev_attr_fan2_status); | |
527 | device_create_file(&new_client->dev, &dev_attr_fan2_ripple); | |
528 | device_create_file(&new_client->dev, &dev_attr_pwm2); | |
529 | device_create_file(&new_client->dev, &dev_attr_fan3_input); | |
530 | device_create_file(&new_client->dev, &dev_attr_fan3_status); | |
531 | device_create_file(&new_client->dev, &dev_attr_fan3_ripple); | |
532 | ||
533 | return 0; | |
534 | ||
943b0830 MH |
535 | exit_detach: |
536 | i2c_detach_client(new_client); | |
1da177e4 LT |
537 | exit_free: |
538 | kfree(data); | |
539 | exit: | |
540 | return err; | |
541 | } | |
542 | ||
543 | static int fscpos_detach_client(struct i2c_client *client) | |
544 | { | |
943b0830 | 545 | struct fscpos_data *data = i2c_get_clientdata(client); |
1da177e4 LT |
546 | int err; |
547 | ||
943b0830 MH |
548 | hwmon_device_unregister(data->class_dev); |
549 | ||
7bef5594 | 550 | if ((err = i2c_detach_client(client))) |
1da177e4 | 551 | return err; |
943b0830 | 552 | kfree(data); |
1da177e4 LT |
553 | return 0; |
554 | } | |
555 | ||
556 | static int fscpos_read_value(struct i2c_client *client, u8 reg) | |
557 | { | |
558 | dev_dbg(&client->dev, "Read reg 0x%02x\n", reg); | |
559 | return i2c_smbus_read_byte_data(client, reg); | |
560 | } | |
561 | ||
562 | static int fscpos_write_value(struct i2c_client *client, u8 reg, u8 value) | |
563 | { | |
564 | dev_dbg(&client->dev, "Write reg 0x%02x, val 0x%02x\n", reg, value); | |
565 | return i2c_smbus_write_byte_data(client, reg, value); | |
566 | } | |
567 | ||
568 | /* Called when we have found a new FSCPOS chip */ | |
569 | static void fscpos_init_client(struct i2c_client *client) | |
570 | { | |
571 | struct fscpos_data *data = i2c_get_clientdata(client); | |
572 | ||
573 | /* read revision from chip */ | |
574 | data->revision = fscpos_read_value(client, FSCPOS_REG_REVISION); | |
575 | } | |
576 | ||
577 | static struct fscpos_data *fscpos_update_device(struct device *dev) | |
578 | { | |
579 | struct i2c_client *client = to_i2c_client(dev); | |
580 | struct fscpos_data *data = i2c_get_clientdata(client); | |
581 | ||
582 | down(&data->update_lock); | |
583 | ||
0cacdf29 | 584 | if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { |
1da177e4 LT |
585 | int i; |
586 | ||
587 | dev_dbg(&client->dev, "Starting fscpos update\n"); | |
588 | ||
589 | for (i = 0; i < 3; i++) { | |
590 | data->temp_act[i] = fscpos_read_value(client, | |
591 | FSCPOS_REG_TEMP_ACT[i]); | |
592 | data->temp_status[i] = fscpos_read_value(client, | |
593 | FSCPOS_REG_TEMP_STATE[i]); | |
594 | data->fan_act[i] = fscpos_read_value(client, | |
595 | FSCPOS_REG_FAN_ACT[i]); | |
596 | data->fan_status[i] = fscpos_read_value(client, | |
597 | FSCPOS_REG_FAN_STATE[i]); | |
598 | data->fan_ripple[i] = fscpos_read_value(client, | |
599 | FSCPOS_REG_FAN_RIPPLE[i]); | |
600 | if (i < 2) { | |
601 | /* fan2_min is not supported by the chip */ | |
602 | data->pwm[i] = fscpos_read_value(client, | |
603 | FSCPOS_REG_PWM[i]); | |
604 | } | |
605 | /* reset fan status if speed is back to > 0 */ | |
606 | if (data->fan_status[i] != 0 && data->fan_act[i] > 0) { | |
607 | reset_fan_alarm(client, i); | |
608 | } | |
609 | } | |
610 | ||
611 | data->volt[0] = fscpos_read_value(client, FSCPOS_REG_VOLT_12); | |
612 | data->volt[1] = fscpos_read_value(client, FSCPOS_REG_VOLT_5); | |
613 | data->volt[2] = fscpos_read_value(client, FSCPOS_REG_VOLT_BATT); | |
614 | ||
615 | data->wdog_preset = fscpos_read_value(client, | |
616 | FSCPOS_REG_WDOG_PRESET); | |
617 | data->wdog_state = fscpos_read_value(client, | |
618 | FSCPOS_REG_WDOG_STATE); | |
619 | data->wdog_control = fscpos_read_value(client, | |
620 | FSCPOS_REG_WDOG_CONTROL); | |
621 | ||
622 | data->global_event = fscpos_read_value(client, | |
623 | FSCPOS_REG_EVENT_STATE); | |
624 | ||
625 | data->last_updated = jiffies; | |
626 | data->valid = 1; | |
627 | } | |
628 | up(&data->update_lock); | |
629 | return data; | |
630 | } | |
631 | ||
632 | static int __init sm_fscpos_init(void) | |
633 | { | |
634 | return i2c_add_driver(&fscpos_driver); | |
635 | } | |
636 | ||
637 | static void __exit sm_fscpos_exit(void) | |
638 | { | |
639 | i2c_del_driver(&fscpos_driver); | |
640 | } | |
641 | ||
642 | MODULE_AUTHOR("Stefan Ott <stefan@desire.ch> based on work from Hermann Jung " | |
643 | "<hej@odn.de>, Frodo Looijaard <frodol@dds.nl>" | |
644 | " and Philip Edelbrock <phil@netroedge.com>"); | |
645 | MODULE_DESCRIPTION("fujitsu siemens poseidon chip driver"); | |
646 | MODULE_LICENSE("GPL"); | |
647 | ||
648 | module_init(sm_fscpos_init); | |
649 | module_exit(sm_fscpos_exit); |