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1da177e4 LT |
1 | /* |
2 | * Device driver for the i2c thermostat found on the iBook G4, Albook G4 | |
3 | * | |
4 | * Copyright (C) 2003, 2004 Colin Leroy, Rasmus Rohde, Benjamin Herrenschmidt | |
5 | * | |
6 | * Documentation from | |
7 | * http://www.analog.com/UploadedFiles/Data_Sheets/115254175ADT7467_pra.pdf | |
8 | * http://www.analog.com/UploadedFiles/Data_Sheets/3686221171167ADT7460_b.pdf | |
9 | * | |
10 | */ | |
11 | ||
12 | #include <linux/config.h> | |
13 | #include <linux/types.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/sched.h> | |
19 | #include <linux/i2c.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/spinlock.h> | |
23 | #include <linux/smp_lock.h> | |
24 | #include <linux/wait.h> | |
25 | #include <linux/suspend.h> | |
26 | #include <linux/kthread.h> | |
27 | #include <linux/moduleparam.h> | |
28 | ||
29 | #include <asm/prom.h> | |
30 | #include <asm/machdep.h> | |
31 | #include <asm/io.h> | |
32 | #include <asm/system.h> | |
33 | #include <asm/sections.h> | |
34 | #include <asm/of_device.h> | |
35 | ||
36 | #undef DEBUG | |
37 | ||
38 | #define CONFIG_REG 0x40 | |
39 | #define MANUAL_MASK 0xe0 | |
40 | #define AUTO_MASK 0x20 | |
41 | ||
d20c507f CL |
42 | static u8 TEMP_REG[3] = {0x26, 0x25, 0x27}; /* local, sensor1, sensor2 */ |
43 | static u8 LIMIT_REG[3] = {0x6b, 0x6a, 0x6c}; /* local, sensor1, sensor2 */ | |
1da177e4 LT |
44 | static u8 MANUAL_MODE[2] = {0x5c, 0x5d}; |
45 | static u8 REM_CONTROL[2] = {0x00, 0x40}; | |
46 | static u8 FAN_SPEED[2] = {0x28, 0x2a}; | |
47 | static u8 FAN_SPD_SET[2] = {0x30, 0x31}; | |
48 | ||
d20c507f CL |
49 | static u8 default_limits_local[3] = {70, 50, 70}; /* local, sensor1, sensor2 */ |
50 | static u8 default_limits_chip[3] = {80, 65, 80}; /* local, sensor1, sensor2 */ | |
51 | static char *sensor_location[3] = {NULL, NULL, NULL}; | |
1da177e4 LT |
52 | |
53 | static int limit_adjust = 0; | |
54 | static int fan_speed = -1; | |
55 | ||
56 | MODULE_AUTHOR("Colin Leroy <colin@colino.net>"); | |
57 | MODULE_DESCRIPTION("Driver for ADT746x thermostat in iBook G4 and " | |
58 | "Powerbook G4 Alu"); | |
59 | MODULE_LICENSE("GPL"); | |
60 | ||
61 | module_param(limit_adjust, int, 0644); | |
d20c507f | 62 | MODULE_PARM_DESC(limit_adjust,"Adjust maximum temperatures (50 sensor1, 70 sensor2) " |
1da177e4 LT |
63 | "by N degrees."); |
64 | ||
65 | module_param(fan_speed, int, 0644); | |
66 | MODULE_PARM_DESC(fan_speed,"Specify starting fan speed (0-255) " | |
67 | "(default 64)"); | |
68 | ||
69 | struct thermostat { | |
70 | struct i2c_client clt; | |
71 | u8 temps[3]; | |
72 | u8 cached_temp[3]; | |
73 | u8 initial_limits[3]; | |
74 | u8 limits[3]; | |
75 | int last_speed[2]; | |
76 | int last_var[2]; | |
77 | }; | |
78 | ||
79 | static enum {ADT7460, ADT7467} therm_type; | |
80 | static int therm_bus, therm_address; | |
81 | static struct of_device * of_dev; | |
82 | static struct thermostat* thermostat; | |
83 | static struct task_struct *thread_therm = NULL; | |
84 | ||
85 | static int attach_one_thermostat(struct i2c_adapter *adapter, int addr, | |
86 | int busno); | |
87 | ||
88 | static void write_both_fan_speed(struct thermostat *th, int speed); | |
89 | static void write_fan_speed(struct thermostat *th, int speed, int fan); | |
90 | ||
91 | static int | |
92 | write_reg(struct thermostat* th, int reg, u8 data) | |
93 | { | |
94 | u8 tmp[2]; | |
95 | int rc; | |
96 | ||
97 | tmp[0] = reg; | |
98 | tmp[1] = data; | |
99 | rc = i2c_master_send(&th->clt, (const char *)tmp, 2); | |
100 | if (rc < 0) | |
101 | return rc; | |
102 | if (rc != 2) | |
103 | return -ENODEV; | |
104 | return 0; | |
105 | } | |
106 | ||
107 | static int | |
108 | read_reg(struct thermostat* th, int reg) | |
109 | { | |
110 | u8 reg_addr, data; | |
111 | int rc; | |
112 | ||
113 | reg_addr = (u8)reg; | |
114 | rc = i2c_master_send(&th->clt, ®_addr, 1); | |
115 | if (rc < 0) | |
116 | return rc; | |
117 | if (rc != 1) | |
118 | return -ENODEV; | |
119 | rc = i2c_master_recv(&th->clt, (char *)&data, 1); | |
120 | if (rc < 0) | |
121 | return rc; | |
122 | return data; | |
123 | } | |
124 | ||
125 | static int | |
126 | attach_thermostat(struct i2c_adapter *adapter) | |
127 | { | |
128 | unsigned long bus_no; | |
129 | ||
130 | if (strncmp(adapter->name, "uni-n", 5)) | |
131 | return -ENODEV; | |
132 | bus_no = simple_strtoul(adapter->name + 6, NULL, 10); | |
133 | if (bus_no != therm_bus) | |
134 | return -ENODEV; | |
135 | return attach_one_thermostat(adapter, therm_address, bus_no); | |
136 | } | |
137 | ||
138 | static int | |
139 | detach_thermostat(struct i2c_adapter *adapter) | |
140 | { | |
141 | struct thermostat* th; | |
142 | int i; | |
143 | ||
144 | if (thermostat == NULL) | |
145 | return 0; | |
146 | ||
147 | th = thermostat; | |
148 | ||
149 | if (thread_therm != NULL) { | |
150 | kthread_stop(thread_therm); | |
151 | } | |
152 | ||
153 | printk(KERN_INFO "adt746x: Putting max temperatures back from " | |
154 | "%d, %d, %d to %d, %d, %d\n", | |
155 | th->limits[0], th->limits[1], th->limits[2], | |
156 | th->initial_limits[0], th->initial_limits[1], | |
157 | th->initial_limits[2]); | |
158 | ||
159 | for (i = 0; i < 3; i++) | |
160 | write_reg(th, LIMIT_REG[i], th->initial_limits[i]); | |
161 | ||
162 | write_both_fan_speed(th, -1); | |
163 | ||
164 | i2c_detach_client(&th->clt); | |
165 | ||
166 | thermostat = NULL; | |
167 | ||
168 | kfree(th); | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | static struct i2c_driver thermostat_driver = { | |
174 | .owner = THIS_MODULE, | |
175 | .name = "therm_adt746x", | |
176 | .flags = I2C_DF_NOTIFY, | |
177 | .attach_adapter = attach_thermostat, | |
178 | .detach_adapter = detach_thermostat, | |
179 | }; | |
180 | ||
181 | static int read_fan_speed(struct thermostat *th, u8 addr) | |
182 | { | |
183 | u8 tmp[2]; | |
184 | u16 res; | |
185 | ||
186 | /* should start with low byte */ | |
187 | tmp[1] = read_reg(th, addr); | |
188 | tmp[0] = read_reg(th, addr + 1); | |
189 | ||
190 | res = tmp[1] + (tmp[0] << 8); | |
191 | /* "a value of 0xffff means that the fan has stopped" */ | |
192 | return (res == 0xffff ? 0 : (90000*60)/res); | |
193 | } | |
194 | ||
195 | static void write_both_fan_speed(struct thermostat *th, int speed) | |
196 | { | |
197 | write_fan_speed(th, speed, 0); | |
198 | if (therm_type == ADT7460) | |
199 | write_fan_speed(th, speed, 1); | |
200 | } | |
201 | ||
202 | static void write_fan_speed(struct thermostat *th, int speed, int fan) | |
203 | { | |
204 | u8 manual; | |
205 | ||
206 | if (speed > 0xff) | |
207 | speed = 0xff; | |
208 | else if (speed < -1) | |
209 | speed = 0; | |
210 | ||
211 | if (therm_type == ADT7467 && fan == 1) | |
212 | return; | |
213 | ||
214 | if (th->last_speed[fan] != speed) { | |
215 | if (speed == -1) | |
216 | printk(KERN_DEBUG "adt746x: Setting speed to automatic " | |
d20c507f | 217 | "for %s fan.\n", sensor_location[fan+1]); |
1da177e4 LT |
218 | else |
219 | printk(KERN_DEBUG "adt746x: Setting speed to %d " | |
d20c507f | 220 | "for %s fan.\n", speed, sensor_location[fan+1]); |
1da177e4 LT |
221 | } else |
222 | return; | |
223 | ||
224 | if (speed >= 0) { | |
225 | manual = read_reg(th, MANUAL_MODE[fan]); | |
226 | write_reg(th, MANUAL_MODE[fan], manual|MANUAL_MASK); | |
227 | write_reg(th, FAN_SPD_SET[fan], speed); | |
228 | } else { | |
229 | /* back to automatic */ | |
230 | if(therm_type == ADT7460) { | |
231 | manual = read_reg(th, | |
232 | MANUAL_MODE[fan]) & (~MANUAL_MASK); | |
233 | ||
234 | write_reg(th, | |
235 | MANUAL_MODE[fan], manual|REM_CONTROL[fan]); | |
236 | } else { | |
237 | manual = read_reg(th, MANUAL_MODE[fan]); | |
238 | write_reg(th, MANUAL_MODE[fan], manual&(~AUTO_MASK)); | |
239 | } | |
240 | } | |
241 | ||
242 | th->last_speed[fan] = speed; | |
243 | } | |
244 | ||
245 | static void read_sensors(struct thermostat *th) | |
246 | { | |
247 | int i = 0; | |
248 | ||
249 | for (i = 0; i < 3; i++) | |
250 | th->temps[i] = read_reg(th, TEMP_REG[i]); | |
251 | } | |
252 | ||
253 | #ifdef DEBUG | |
254 | static void display_stats(struct thermostat *th) | |
255 | { | |
256 | if (th->temps[0] != th->cached_temp[0] | |
257 | || th->temps[1] != th->cached_temp[1] | |
258 | || th->temps[2] != th->cached_temp[2]) { | |
259 | printk(KERN_INFO "adt746x: Temperature infos:" | |
260 | " thermostats: %d,%d,%d;" | |
261 | " limits: %d,%d,%d;" | |
262 | " fan speed: %d RPM\n", | |
263 | th->temps[0], th->temps[1], th->temps[2], | |
264 | th->limits[0], th->limits[1], th->limits[2], | |
265 | read_fan_speed(th, FAN_SPEED[0])); | |
266 | } | |
267 | th->cached_temp[0] = th->temps[0]; | |
268 | th->cached_temp[1] = th->temps[1]; | |
269 | th->cached_temp[2] = th->temps[2]; | |
270 | } | |
271 | #endif | |
272 | ||
273 | static void update_fans_speed (struct thermostat *th) | |
274 | { | |
275 | int lastvar = 0; /* last variation, for iBook */ | |
276 | int i = 0; | |
277 | ||
278 | /* we don't care about local sensor, so we start at sensor 1 */ | |
279 | for (i = 1; i < 3; i++) { | |
280 | int started = 0; | |
281 | int fan_number = (therm_type == ADT7460 && i == 2); | |
282 | int var = th->temps[i] - th->limits[i]; | |
283 | ||
284 | if (var > -1) { | |
285 | int step = (255 - fan_speed) / 7; | |
286 | int new_speed = 0; | |
287 | ||
288 | /* hysteresis : change fan speed only if variation is | |
289 | * more than two degrees */ | |
290 | if (abs(var - th->last_var[fan_number]) < 2) | |
291 | continue; | |
292 | ||
293 | started = 1; | |
294 | new_speed = fan_speed + ((var-1)*step); | |
295 | ||
296 | if (new_speed < fan_speed) | |
297 | new_speed = fan_speed; | |
298 | if (new_speed > 255) | |
299 | new_speed = 255; | |
300 | ||
301 | printk(KERN_DEBUG "adt746x: setting fans speed to %d " | |
302 | "(limit exceeded by %d on %s) \n", | |
303 | new_speed, var, | |
d20c507f | 304 | sensor_location[fan_number+1]); |
1da177e4 LT |
305 | write_both_fan_speed(th, new_speed); |
306 | th->last_var[fan_number] = var; | |
307 | } else if (var < -2) { | |
d20c507f | 308 | /* don't stop fan if sensor2 is cold and sensor1 is not |
1da177e4 LT |
309 | * so cold (lastvar >= -1) */ |
310 | if (i == 2 && lastvar < -1) { | |
311 | if (th->last_speed[fan_number] != 0) | |
312 | printk(KERN_DEBUG "adt746x: Stopping " | |
313 | "fans.\n"); | |
314 | write_both_fan_speed(th, 0); | |
315 | } | |
316 | } | |
317 | ||
318 | lastvar = var; | |
319 | ||
320 | if (started) | |
321 | return; /* we don't want to re-stop the fan | |
d20c507f | 322 | * if sensor1 is heating and sensor2 is not */ |
1da177e4 LT |
323 | } |
324 | } | |
325 | ||
326 | static int monitor_task(void *arg) | |
327 | { | |
328 | struct thermostat* th = arg; | |
329 | ||
330 | while(!kthread_should_stop()) { | |
3e1d1d28 | 331 | try_to_freeze(); |
1da177e4 LT |
332 | msleep_interruptible(2000); |
333 | ||
334 | #ifndef DEBUG | |
335 | if (fan_speed != -1) | |
336 | read_sensors(th); | |
337 | #else | |
338 | read_sensors(th); | |
339 | #endif | |
340 | ||
341 | if (fan_speed != -1) | |
342 | update_fans_speed(th); | |
343 | ||
344 | #ifdef DEBUG | |
345 | display_stats(th); | |
346 | #endif | |
347 | ||
348 | } | |
349 | ||
350 | return 0; | |
351 | } | |
352 | ||
353 | static void set_limit(struct thermostat *th, int i) | |
354 | { | |
d20c507f | 355 | /* Set sensor1 limit higher to avoid powerdowns */ |
1da177e4 LT |
356 | th->limits[i] = default_limits_chip[i] + limit_adjust; |
357 | write_reg(th, LIMIT_REG[i], th->limits[i]); | |
358 | ||
359 | /* set our limits to normal */ | |
360 | th->limits[i] = default_limits_local[i] + limit_adjust; | |
361 | } | |
362 | ||
363 | static int attach_one_thermostat(struct i2c_adapter *adapter, int addr, | |
364 | int busno) | |
365 | { | |
366 | struct thermostat* th; | |
367 | int rc; | |
368 | int i; | |
369 | ||
370 | if (thermostat) | |
371 | return 0; | |
372 | ||
373 | th = (struct thermostat *) | |
374 | kmalloc(sizeof(struct thermostat), GFP_KERNEL); | |
375 | ||
376 | if (!th) | |
377 | return -ENOMEM; | |
378 | ||
379 | memset(th, 0, sizeof(*th)); | |
380 | th->clt.addr = addr; | |
381 | th->clt.adapter = adapter; | |
382 | th->clt.driver = &thermostat_driver; | |
383 | strcpy(th->clt.name, "thermostat"); | |
384 | ||
385 | rc = read_reg(th, 0); | |
386 | if (rc < 0) { | |
387 | printk(KERN_ERR "adt746x: Thermostat failed to read config " | |
388 | "from bus %d !\n", | |
389 | busno); | |
390 | kfree(th); | |
391 | return -ENODEV; | |
392 | } | |
393 | ||
394 | /* force manual control to start the fan quieter */ | |
395 | if (fan_speed == -1) | |
396 | fan_speed = 64; | |
397 | ||
398 | if(therm_type == ADT7460) { | |
399 | printk(KERN_INFO "adt746x: ADT7460 initializing\n"); | |
400 | /* The 7460 needs to be started explicitly */ | |
401 | write_reg(th, CONFIG_REG, 1); | |
402 | } else | |
403 | printk(KERN_INFO "adt746x: ADT7467 initializing\n"); | |
404 | ||
405 | for (i = 0; i < 3; i++) { | |
406 | th->initial_limits[i] = read_reg(th, LIMIT_REG[i]); | |
407 | set_limit(th, i); | |
408 | } | |
409 | ||
410 | printk(KERN_INFO "adt746x: Lowering max temperatures from %d, %d, %d" | |
411 | " to %d, %d, %d\n", | |
412 | th->initial_limits[0], th->initial_limits[1], | |
413 | th->initial_limits[2], th->limits[0], th->limits[1], | |
414 | th->limits[2]); | |
415 | ||
416 | thermostat = th; | |
417 | ||
418 | if (i2c_attach_client(&th->clt)) { | |
419 | printk(KERN_INFO "adt746x: Thermostat failed to attach " | |
420 | "client !\n"); | |
421 | thermostat = NULL; | |
422 | kfree(th); | |
423 | return -ENODEV; | |
424 | } | |
425 | ||
426 | /* be sure to really write fan speed the first time */ | |
427 | th->last_speed[0] = -2; | |
428 | th->last_speed[1] = -2; | |
429 | th->last_var[0] = -80; | |
430 | th->last_var[1] = -80; | |
431 | ||
432 | if (fan_speed != -1) { | |
433 | /* manual mode, stop fans */ | |
434 | write_both_fan_speed(th, 0); | |
435 | } else { | |
436 | /* automatic mode */ | |
437 | write_both_fan_speed(th, -1); | |
438 | } | |
439 | ||
440 | thread_therm = kthread_run(monitor_task, th, "kfand"); | |
441 | ||
442 | if (thread_therm == ERR_PTR(-ENOMEM)) { | |
443 | printk(KERN_INFO "adt746x: Kthread creation failed\n"); | |
444 | thread_therm = NULL; | |
445 | return -ENOMEM; | |
446 | } | |
447 | ||
448 | return 0; | |
449 | } | |
450 | ||
451 | /* | |
452 | * Now, unfortunately, sysfs doesn't give us a nice void * we could | |
453 | * pass around to the attribute functions, so we don't really have | |
454 | * choice but implement a bunch of them... | |
455 | * | |
e404e274 | 456 | * FIXME, it does now... |
1da177e4 LT |
457 | */ |
458 | #define BUILD_SHOW_FUNC_INT(name, data) \ | |
e404e274 | 459 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
460 | { \ |
461 | return sprintf(buf, "%d\n", data); \ | |
462 | } | |
463 | ||
d20c507f | 464 | #define BUILD_SHOW_FUNC_STR(name, data) \ |
e404e274 | 465 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
d20c507f CL |
466 | { \ |
467 | return sprintf(buf, "%s\n", data); \ | |
468 | } | |
469 | ||
1da177e4 | 470 | #define BUILD_SHOW_FUNC_FAN(name, data) \ |
e404e274 | 471 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
472 | { \ |
473 | return sprintf(buf, "%d (%d rpm)\n", \ | |
474 | thermostat->last_speed[data], \ | |
475 | read_fan_speed(thermostat, FAN_SPEED[data]) \ | |
476 | ); \ | |
477 | } | |
478 | ||
479 | #define BUILD_STORE_FUNC_DEG(name, data) \ | |
e404e274 | 480 | static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \ |
1da177e4 LT |
481 | { \ |
482 | int val; \ | |
483 | int i; \ | |
484 | val = simple_strtol(buf, NULL, 10); \ | |
d20c507f | 485 | printk(KERN_INFO "Adjusting limits by %d degrees\n", val); \ |
1da177e4 LT |
486 | limit_adjust = val; \ |
487 | for (i=0; i < 3; i++) \ | |
488 | set_limit(thermostat, i); \ | |
489 | return n; \ | |
490 | } | |
491 | ||
492 | #define BUILD_STORE_FUNC_INT(name, data) \ | |
e404e274 | 493 | static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \ |
1da177e4 LT |
494 | { \ |
495 | u32 val; \ | |
496 | val = simple_strtoul(buf, NULL, 10); \ | |
497 | if (val < 0 || val > 255) \ | |
498 | return -EINVAL; \ | |
499 | printk(KERN_INFO "Setting specified fan speed to %d\n", val); \ | |
500 | data = val; \ | |
501 | return n; \ | |
502 | } | |
503 | ||
d20c507f CL |
504 | BUILD_SHOW_FUNC_INT(sensor1_temperature, (read_reg(thermostat, TEMP_REG[1]))) |
505 | BUILD_SHOW_FUNC_INT(sensor2_temperature, (read_reg(thermostat, TEMP_REG[2]))) | |
506 | BUILD_SHOW_FUNC_INT(sensor1_limit, thermostat->limits[1]) | |
507 | BUILD_SHOW_FUNC_INT(sensor2_limit, thermostat->limits[2]) | |
508 | BUILD_SHOW_FUNC_STR(sensor1_location, sensor_location[1]) | |
509 | BUILD_SHOW_FUNC_STR(sensor2_location, sensor_location[2]) | |
1da177e4 LT |
510 | |
511 | BUILD_SHOW_FUNC_INT(specified_fan_speed, fan_speed) | |
d20c507f CL |
512 | BUILD_SHOW_FUNC_FAN(sensor1_fan_speed, 0) |
513 | BUILD_SHOW_FUNC_FAN(sensor2_fan_speed, 1) | |
1da177e4 LT |
514 | |
515 | BUILD_STORE_FUNC_INT(specified_fan_speed,fan_speed) | |
516 | BUILD_SHOW_FUNC_INT(limit_adjust, limit_adjust) | |
517 | BUILD_STORE_FUNC_DEG(limit_adjust, thermostat) | |
518 | ||
d20c507f CL |
519 | static DEVICE_ATTR(sensor1_temperature, S_IRUGO, |
520 | show_sensor1_temperature,NULL); | |
521 | static DEVICE_ATTR(sensor2_temperature, S_IRUGO, | |
522 | show_sensor2_temperature,NULL); | |
523 | static DEVICE_ATTR(sensor1_limit, S_IRUGO, | |
524 | show_sensor1_limit, NULL); | |
525 | static DEVICE_ATTR(sensor2_limit, S_IRUGO, | |
526 | show_sensor2_limit, NULL); | |
527 | static DEVICE_ATTR(sensor1_location, S_IRUGO, | |
528 | show_sensor1_location, NULL); | |
529 | static DEVICE_ATTR(sensor2_location, S_IRUGO, | |
530 | show_sensor2_location, NULL); | |
1da177e4 LT |
531 | |
532 | static DEVICE_ATTR(specified_fan_speed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, | |
533 | show_specified_fan_speed,store_specified_fan_speed); | |
534 | ||
d20c507f CL |
535 | static DEVICE_ATTR(sensor1_fan_speed, S_IRUGO, |
536 | show_sensor1_fan_speed, NULL); | |
537 | static DEVICE_ATTR(sensor2_fan_speed, S_IRUGO, | |
538 | show_sensor2_fan_speed, NULL); | |
1da177e4 LT |
539 | |
540 | static DEVICE_ATTR(limit_adjust, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, | |
541 | show_limit_adjust, store_limit_adjust); | |
542 | ||
543 | ||
544 | static int __init | |
545 | thermostat_init(void) | |
546 | { | |
547 | struct device_node* np; | |
548 | u32 *prop; | |
d20c507f | 549 | int i = 0, offset = 0; |
1da177e4 LT |
550 | |
551 | np = of_find_node_by_name(NULL, "fan"); | |
552 | if (!np) | |
553 | return -ENODEV; | |
554 | if (device_is_compatible(np, "adt7460")) | |
555 | therm_type = ADT7460; | |
556 | else if (device_is_compatible(np, "adt7467")) | |
557 | therm_type = ADT7467; | |
558 | else | |
559 | return -ENODEV; | |
a8bacec0 CL |
560 | |
561 | prop = (u32 *)get_property(np, "hwsensor-params-version", NULL); | |
562 | printk(KERN_INFO "adt746x: version %d (%ssupported)\n", *prop, | |
563 | (*prop == 1)?"":"un"); | |
564 | if (*prop != 1) | |
565 | return -ENODEV; | |
1da177e4 LT |
566 | |
567 | prop = (u32 *)get_property(np, "reg", NULL); | |
568 | if (!prop) | |
569 | return -ENODEV; | |
570 | ||
571 | /* look for bus either by path or using "reg" */ | |
572 | if (strstr(np->full_name, "/i2c-bus@") != NULL) { | |
573 | const char *tmp_bus = (strstr(np->full_name, "/i2c-bus@") + 9); | |
574 | therm_bus = tmp_bus[0]-'0'; | |
575 | } else { | |
576 | therm_bus = ((*prop) >> 8) & 0x0f; | |
577 | } | |
578 | ||
579 | therm_address = ((*prop) & 0xff) >> 1; | |
580 | ||
581 | printk(KERN_INFO "adt746x: Thermostat bus: %d, address: 0x%02x, " | |
582 | "limit_adjust: %d, fan_speed: %d\n", | |
583 | therm_bus, therm_address, limit_adjust, fan_speed); | |
584 | ||
d20c507f CL |
585 | if (get_property(np, "hwsensor-location", NULL)) { |
586 | for (i = 0; i < 3; i++) { | |
587 | sensor_location[i] = get_property(np, | |
588 | "hwsensor-location", NULL) + offset; | |
589 | ||
590 | if (sensor_location[i] == NULL) | |
591 | sensor_location[i] = ""; | |
592 | ||
593 | printk(KERN_INFO "sensor %d: %s\n", i, sensor_location[i]); | |
594 | offset += strlen(sensor_location[i]) + 1; | |
595 | } | |
596 | } else { | |
597 | sensor_location[0] = "?"; | |
598 | sensor_location[1] = "?"; | |
599 | sensor_location[2] = "?"; | |
600 | } | |
601 | ||
1da177e4 LT |
602 | of_dev = of_platform_device_create(np, "temperatures"); |
603 | ||
604 | if (of_dev == NULL) { | |
605 | printk(KERN_ERR "Can't register temperatures device !\n"); | |
606 | return -ENODEV; | |
607 | } | |
608 | ||
d20c507f CL |
609 | device_create_file(&of_dev->dev, &dev_attr_sensor1_temperature); |
610 | device_create_file(&of_dev->dev, &dev_attr_sensor2_temperature); | |
611 | device_create_file(&of_dev->dev, &dev_attr_sensor1_limit); | |
612 | device_create_file(&of_dev->dev, &dev_attr_sensor2_limit); | |
613 | device_create_file(&of_dev->dev, &dev_attr_sensor1_location); | |
614 | device_create_file(&of_dev->dev, &dev_attr_sensor2_location); | |
1da177e4 LT |
615 | device_create_file(&of_dev->dev, &dev_attr_limit_adjust); |
616 | device_create_file(&of_dev->dev, &dev_attr_specified_fan_speed); | |
d20c507f | 617 | device_create_file(&of_dev->dev, &dev_attr_sensor1_fan_speed); |
1da177e4 | 618 | if(therm_type == ADT7460) |
d20c507f | 619 | device_create_file(&of_dev->dev, &dev_attr_sensor2_fan_speed); |
1da177e4 LT |
620 | |
621 | #ifndef CONFIG_I2C_KEYWEST | |
622 | request_module("i2c-keywest"); | |
623 | #endif | |
624 | ||
625 | return i2c_add_driver(&thermostat_driver); | |
626 | } | |
627 | ||
628 | static void __exit | |
629 | thermostat_exit(void) | |
630 | { | |
631 | if (of_dev) { | |
d20c507f CL |
632 | device_remove_file(&of_dev->dev, &dev_attr_sensor1_temperature); |
633 | device_remove_file(&of_dev->dev, &dev_attr_sensor2_temperature); | |
634 | device_remove_file(&of_dev->dev, &dev_attr_sensor1_limit); | |
635 | device_remove_file(&of_dev->dev, &dev_attr_sensor2_limit); | |
636 | device_remove_file(&of_dev->dev, &dev_attr_sensor1_location); | |
637 | device_remove_file(&of_dev->dev, &dev_attr_sensor2_location); | |
1da177e4 LT |
638 | device_remove_file(&of_dev->dev, &dev_attr_limit_adjust); |
639 | device_remove_file(&of_dev->dev, &dev_attr_specified_fan_speed); | |
d20c507f | 640 | device_remove_file(&of_dev->dev, &dev_attr_sensor1_fan_speed); |
1da177e4 LT |
641 | |
642 | if(therm_type == ADT7460) | |
643 | device_remove_file(&of_dev->dev, | |
d20c507f | 644 | &dev_attr_sensor2_fan_speed); |
1da177e4 LT |
645 | |
646 | of_device_unregister(of_dev); | |
647 | } | |
648 | i2c_del_driver(&thermostat_driver); | |
649 | } | |
650 | ||
651 | module_init(thermostat_init); | |
652 | module_exit(thermostat_exit); |