Commit | Line | Data |
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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 | * | |
631dd1a8 JM |
6 | * Documentation from 115254175ADT7467_pra.pdf and 3686221171167ADT7460_b.pdf |
7 | * http://www.onsemi.com/PowerSolutions/product.do?id=ADT7467 | |
8 | * http://www.onsemi.com/PowerSolutions/product.do?id=ADT7460 | |
1da177e4 LT |
9 | * |
10 | */ | |
11 | ||
1da177e4 LT |
12 | #include <linux/types.h> |
13 | #include <linux/module.h> | |
14 | #include <linux/errno.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/delay.h> | |
17 | #include <linux/sched.h> | |
18 | #include <linux/i2c.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/spinlock.h> | |
1da177e4 LT |
22 | #include <linux/wait.h> |
23 | #include <linux/suspend.h> | |
24 | #include <linux/kthread.h> | |
25 | #include <linux/moduleparam.h> | |
7dfb7103 | 26 | #include <linux/freezer.h> |
ad9e05ae | 27 | #include <linux/of_platform.h> |
1da177e4 LT |
28 | |
29 | #include <asm/prom.h> | |
30 | #include <asm/machdep.h> | |
31 | #include <asm/io.h> | |
1da177e4 | 32 | #include <asm/sections.h> |
1da177e4 LT |
33 | |
34 | #undef DEBUG | |
35 | ||
36 | #define CONFIG_REG 0x40 | |
37 | #define MANUAL_MASK 0xe0 | |
38 | #define AUTO_MASK 0x20 | |
0512a9a8 | 39 | #define INVERT_MASK 0x10 |
1da177e4 | 40 | |
d20c507f CL |
41 | static u8 TEMP_REG[3] = {0x26, 0x25, 0x27}; /* local, sensor1, sensor2 */ |
42 | static u8 LIMIT_REG[3] = {0x6b, 0x6a, 0x6c}; /* local, sensor1, sensor2 */ | |
1da177e4 LT |
43 | static u8 MANUAL_MODE[2] = {0x5c, 0x5d}; |
44 | static u8 REM_CONTROL[2] = {0x00, 0x40}; | |
45 | static u8 FAN_SPEED[2] = {0x28, 0x2a}; | |
46 | static u8 FAN_SPD_SET[2] = {0x30, 0x31}; | |
47 | ||
d20c507f CL |
48 | static u8 default_limits_local[3] = {70, 50, 70}; /* local, sensor1, sensor2 */ |
49 | static u8 default_limits_chip[3] = {80, 65, 80}; /* local, sensor1, sensor2 */ | |
7a4b15cd | 50 | static const char *sensor_location[3] = { "?", "?", "?" }; |
1da177e4 | 51 | |
87275856 | 52 | static int limit_adjust; |
1da177e4 | 53 | static int fan_speed = -1; |
90ab5ee9 | 54 | static bool verbose; |
1da177e4 LT |
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 | ||
9f6d4b0c BC |
69 | module_param(verbose, bool, 0); |
70 | MODULE_PARM_DESC(verbose,"Verbose log operations " | |
71 | "(default 0)"); | |
72 | ||
1da177e4 | 73 | struct thermostat { |
2e613e7f | 74 | struct i2c_client *clt; |
1da177e4 LT |
75 | u8 temps[3]; |
76 | u8 cached_temp[3]; | |
77 | u8 initial_limits[3]; | |
78 | u8 limits[3]; | |
79 | int last_speed[2]; | |
80 | int last_var[2]; | |
1496e89a | 81 | int pwm_inv[2]; |
7a4b15cd BH |
82 | struct task_struct *thread; |
83 | struct platform_device *pdev; | |
84 | enum { | |
85 | ADT7460, | |
86 | ADT7467 | |
87 | } type; | |
1da177e4 LT |
88 | }; |
89 | ||
1da177e4 LT |
90 | static void write_both_fan_speed(struct thermostat *th, int speed); |
91 | static void write_fan_speed(struct thermostat *th, int speed, int fan); | |
92 | ||
93 | static int | |
94 | write_reg(struct thermostat* th, int reg, u8 data) | |
95 | { | |
96 | u8 tmp[2]; | |
97 | int rc; | |
98 | ||
99 | tmp[0] = reg; | |
100 | tmp[1] = data; | |
2e613e7f | 101 | rc = i2c_master_send(th->clt, (const char *)tmp, 2); |
1da177e4 LT |
102 | if (rc < 0) |
103 | return rc; | |
104 | if (rc != 2) | |
105 | return -ENODEV; | |
106 | return 0; | |
107 | } | |
108 | ||
109 | static int | |
110 | read_reg(struct thermostat* th, int reg) | |
111 | { | |
112 | u8 reg_addr, data; | |
113 | int rc; | |
114 | ||
115 | reg_addr = (u8)reg; | |
2e613e7f | 116 | rc = i2c_master_send(th->clt, ®_addr, 1); |
1da177e4 LT |
117 | if (rc < 0) |
118 | return rc; | |
119 | if (rc != 1) | |
120 | return -ENODEV; | |
2e613e7f | 121 | rc = i2c_master_recv(th->clt, (char *)&data, 1); |
1da177e4 LT |
122 | if (rc < 0) |
123 | return rc; | |
124 | return data; | |
125 | } | |
126 | ||
1da177e4 LT |
127 | static int read_fan_speed(struct thermostat *th, u8 addr) |
128 | { | |
129 | u8 tmp[2]; | |
130 | u16 res; | |
131 | ||
132 | /* should start with low byte */ | |
133 | tmp[1] = read_reg(th, addr); | |
134 | tmp[0] = read_reg(th, addr + 1); | |
135 | ||
136 | res = tmp[1] + (tmp[0] << 8); | |
137 | /* "a value of 0xffff means that the fan has stopped" */ | |
138 | return (res == 0xffff ? 0 : (90000*60)/res); | |
139 | } | |
140 | ||
141 | static void write_both_fan_speed(struct thermostat *th, int speed) | |
142 | { | |
143 | write_fan_speed(th, speed, 0); | |
7a4b15cd | 144 | if (th->type == ADT7460) |
1da177e4 LT |
145 | write_fan_speed(th, speed, 1); |
146 | } | |
147 | ||
148 | static void write_fan_speed(struct thermostat *th, int speed, int fan) | |
149 | { | |
150 | u8 manual; | |
151 | ||
152 | if (speed > 0xff) | |
153 | speed = 0xff; | |
154 | else if (speed < -1) | |
155 | speed = 0; | |
156 | ||
7a4b15cd | 157 | if (th->type == ADT7467 && fan == 1) |
1da177e4 LT |
158 | return; |
159 | ||
160 | if (th->last_speed[fan] != speed) { | |
9f6d4b0c BC |
161 | if (verbose) { |
162 | if (speed == -1) | |
163 | printk(KERN_DEBUG "adt746x: Setting speed to automatic " | |
164 | "for %s fan.\n", sensor_location[fan+1]); | |
165 | else | |
166 | printk(KERN_DEBUG "adt746x: Setting speed to %d " | |
167 | "for %s fan.\n", speed, sensor_location[fan+1]); | |
168 | } | |
1da177e4 LT |
169 | } else |
170 | return; | |
171 | ||
172 | if (speed >= 0) { | |
173 | manual = read_reg(th, MANUAL_MODE[fan]); | |
1496e89a | 174 | manual &= ~INVERT_MASK; |
0512a9a8 | 175 | write_reg(th, MANUAL_MODE[fan], |
1496e89a | 176 | manual | MANUAL_MASK | th->pwm_inv[fan]); |
1da177e4 LT |
177 | write_reg(th, FAN_SPD_SET[fan], speed); |
178 | } else { | |
179 | /* back to automatic */ | |
7a4b15cd | 180 | if(th->type == ADT7460) { |
1da177e4 LT |
181 | manual = read_reg(th, |
182 | MANUAL_MODE[fan]) & (~MANUAL_MASK); | |
1496e89a DW |
183 | manual &= ~INVERT_MASK; |
184 | manual |= th->pwm_inv[fan]; | |
1da177e4 LT |
185 | write_reg(th, |
186 | MANUAL_MODE[fan], manual|REM_CONTROL[fan]); | |
187 | } else { | |
188 | manual = read_reg(th, MANUAL_MODE[fan]); | |
1496e89a DW |
189 | manual &= ~INVERT_MASK; |
190 | manual |= th->pwm_inv[fan]; | |
1da177e4 LT |
191 | write_reg(th, MANUAL_MODE[fan], manual&(~AUTO_MASK)); |
192 | } | |
193 | } | |
194 | ||
195 | th->last_speed[fan] = speed; | |
196 | } | |
197 | ||
198 | static void read_sensors(struct thermostat *th) | |
199 | { | |
200 | int i = 0; | |
201 | ||
202 | for (i = 0; i < 3; i++) | |
203 | th->temps[i] = read_reg(th, TEMP_REG[i]); | |
204 | } | |
205 | ||
206 | #ifdef DEBUG | |
207 | static void display_stats(struct thermostat *th) | |
208 | { | |
209 | if (th->temps[0] != th->cached_temp[0] | |
210 | || th->temps[1] != th->cached_temp[1] | |
211 | || th->temps[2] != th->cached_temp[2]) { | |
212 | printk(KERN_INFO "adt746x: Temperature infos:" | |
213 | " thermostats: %d,%d,%d;" | |
214 | " limits: %d,%d,%d;" | |
215 | " fan speed: %d RPM\n", | |
216 | th->temps[0], th->temps[1], th->temps[2], | |
217 | th->limits[0], th->limits[1], th->limits[2], | |
218 | read_fan_speed(th, FAN_SPEED[0])); | |
219 | } | |
220 | th->cached_temp[0] = th->temps[0]; | |
221 | th->cached_temp[1] = th->temps[1]; | |
222 | th->cached_temp[2] = th->temps[2]; | |
223 | } | |
224 | #endif | |
225 | ||
226 | static void update_fans_speed (struct thermostat *th) | |
227 | { | |
228 | int lastvar = 0; /* last variation, for iBook */ | |
229 | int i = 0; | |
230 | ||
231 | /* we don't care about local sensor, so we start at sensor 1 */ | |
232 | for (i = 1; i < 3; i++) { | |
233 | int started = 0; | |
7a4b15cd | 234 | int fan_number = (th->type == ADT7460 && i == 2); |
1da177e4 LT |
235 | int var = th->temps[i] - th->limits[i]; |
236 | ||
237 | if (var > -1) { | |
238 | int step = (255 - fan_speed) / 7; | |
239 | int new_speed = 0; | |
240 | ||
241 | /* hysteresis : change fan speed only if variation is | |
242 | * more than two degrees */ | |
243 | if (abs(var - th->last_var[fan_number]) < 2) | |
244 | continue; | |
245 | ||
246 | started = 1; | |
247 | new_speed = fan_speed + ((var-1)*step); | |
248 | ||
249 | if (new_speed < fan_speed) | |
250 | new_speed = fan_speed; | |
251 | if (new_speed > 255) | |
252 | new_speed = 255; | |
253 | ||
9f6d4b0c BC |
254 | if (verbose) |
255 | printk(KERN_DEBUG "adt746x: Setting fans speed to %d " | |
8354be9c | 256 | "(limit exceeded by %d on %s)\n", |
9f6d4b0c BC |
257 | new_speed, var, |
258 | sensor_location[fan_number+1]); | |
1da177e4 LT |
259 | write_both_fan_speed(th, new_speed); |
260 | th->last_var[fan_number] = var; | |
261 | } else if (var < -2) { | |
d20c507f | 262 | /* don't stop fan if sensor2 is cold and sensor1 is not |
1da177e4 LT |
263 | * so cold (lastvar >= -1) */ |
264 | if (i == 2 && lastvar < -1) { | |
265 | if (th->last_speed[fan_number] != 0) | |
9f6d4b0c BC |
266 | if (verbose) |
267 | printk(KERN_DEBUG "adt746x: Stopping " | |
268 | "fans.\n"); | |
1da177e4 LT |
269 | write_both_fan_speed(th, 0); |
270 | } | |
271 | } | |
272 | ||
273 | lastvar = var; | |
274 | ||
275 | if (started) | |
276 | return; /* we don't want to re-stop the fan | |
d20c507f | 277 | * if sensor1 is heating and sensor2 is not */ |
1da177e4 LT |
278 | } |
279 | } | |
280 | ||
281 | static int monitor_task(void *arg) | |
282 | { | |
283 | struct thermostat* th = arg; | |
284 | ||
83144186 | 285 | set_freezable(); |
1da177e4 | 286 | while(!kthread_should_stop()) { |
3e1d1d28 | 287 | try_to_freeze(); |
1da177e4 LT |
288 | msleep_interruptible(2000); |
289 | ||
290 | #ifndef DEBUG | |
291 | if (fan_speed != -1) | |
292 | read_sensors(th); | |
293 | #else | |
294 | read_sensors(th); | |
295 | #endif | |
296 | ||
297 | if (fan_speed != -1) | |
298 | update_fans_speed(th); | |
299 | ||
300 | #ifdef DEBUG | |
301 | display_stats(th); | |
302 | #endif | |
303 | ||
304 | } | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
309 | static void set_limit(struct thermostat *th, int i) | |
310 | { | |
7a4b15cd BH |
311 | /* Set sensor1 limit higher to avoid powerdowns */ |
312 | th->limits[i] = default_limits_chip[i] + limit_adjust; | |
313 | write_reg(th, LIMIT_REG[i], th->limits[i]); | |
1da177e4 | 314 | |
7a4b15cd BH |
315 | /* set our limits to normal */ |
316 | th->limits[i] = default_limits_local[i] + limit_adjust; | |
1da177e4 LT |
317 | } |
318 | ||
7a4b15cd BH |
319 | #define BUILD_SHOW_FUNC_INT(name, data) \ |
320 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ | |
321 | { \ | |
322 | struct thermostat *th = dev_get_drvdata(dev); \ | |
323 | return sprintf(buf, "%d\n", data); \ | |
1da177e4 LT |
324 | } |
325 | ||
7a4b15cd | 326 | #define BUILD_SHOW_FUNC_INT_LITE(name, data) \ |
e404e274 | 327 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
328 | { \ |
329 | return sprintf(buf, "%d\n", data); \ | |
330 | } | |
331 | ||
d20c507f | 332 | #define BUILD_SHOW_FUNC_STR(name, data) \ |
e404e274 | 333 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
d20c507f CL |
334 | { \ |
335 | return sprintf(buf, "%s\n", data); \ | |
336 | } | |
337 | ||
1da177e4 | 338 | #define BUILD_SHOW_FUNC_FAN(name, data) \ |
e404e274 | 339 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 | 340 | { \ |
7a4b15cd | 341 | struct thermostat *th = dev_get_drvdata(dev); \ |
1da177e4 | 342 | return sprintf(buf, "%d (%d rpm)\n", \ |
7a4b15cd BH |
343 | th->last_speed[data], \ |
344 | read_fan_speed(th, FAN_SPEED[data]) \ | |
1da177e4 LT |
345 | ); \ |
346 | } | |
347 | ||
348 | #define BUILD_STORE_FUNC_DEG(name, data) \ | |
e404e274 | 349 | static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \ |
1da177e4 | 350 | { \ |
7a4b15cd | 351 | struct thermostat *th = dev_get_drvdata(dev); \ |
1da177e4 LT |
352 | int val; \ |
353 | int i; \ | |
354 | val = simple_strtol(buf, NULL, 10); \ | |
d20c507f | 355 | printk(KERN_INFO "Adjusting limits by %d degrees\n", val); \ |
1da177e4 LT |
356 | limit_adjust = val; \ |
357 | for (i=0; i < 3; i++) \ | |
7a4b15cd | 358 | set_limit(th, i); \ |
1da177e4 LT |
359 | return n; \ |
360 | } | |
361 | ||
362 | #define BUILD_STORE_FUNC_INT(name, data) \ | |
e404e274 | 363 | static ssize_t store_##name(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) \ |
1da177e4 | 364 | { \ |
2e74778c | 365 | int val; \ |
366 | val = simple_strtol(buf, NULL, 10); \ | |
1da177e4 LT |
367 | if (val < 0 || val > 255) \ |
368 | return -EINVAL; \ | |
369 | printk(KERN_INFO "Setting specified fan speed to %d\n", val); \ | |
370 | data = val; \ | |
371 | return n; \ | |
372 | } | |
373 | ||
7a4b15cd BH |
374 | BUILD_SHOW_FUNC_INT(sensor1_temperature, (read_reg(th, TEMP_REG[1]))) |
375 | BUILD_SHOW_FUNC_INT(sensor2_temperature, (read_reg(th, TEMP_REG[2]))) | |
376 | BUILD_SHOW_FUNC_INT(sensor1_limit, th->limits[1]) | |
377 | BUILD_SHOW_FUNC_INT(sensor2_limit, th->limits[2]) | |
d20c507f CL |
378 | BUILD_SHOW_FUNC_STR(sensor1_location, sensor_location[1]) |
379 | BUILD_SHOW_FUNC_STR(sensor2_location, sensor_location[2]) | |
1da177e4 | 380 | |
7a4b15cd BH |
381 | BUILD_SHOW_FUNC_INT_LITE(specified_fan_speed, fan_speed) |
382 | BUILD_STORE_FUNC_INT(specified_fan_speed,fan_speed) | |
383 | ||
d20c507f CL |
384 | BUILD_SHOW_FUNC_FAN(sensor1_fan_speed, 0) |
385 | BUILD_SHOW_FUNC_FAN(sensor2_fan_speed, 1) | |
1da177e4 | 386 | |
7a4b15cd BH |
387 | BUILD_SHOW_FUNC_INT_LITE(limit_adjust, limit_adjust) |
388 | BUILD_STORE_FUNC_DEG(limit_adjust, th) | |
1da177e4 | 389 | |
d20c507f CL |
390 | static DEVICE_ATTR(sensor1_temperature, S_IRUGO, |
391 | show_sensor1_temperature,NULL); | |
392 | static DEVICE_ATTR(sensor2_temperature, S_IRUGO, | |
393 | show_sensor2_temperature,NULL); | |
394 | static DEVICE_ATTR(sensor1_limit, S_IRUGO, | |
395 | show_sensor1_limit, NULL); | |
396 | static DEVICE_ATTR(sensor2_limit, S_IRUGO, | |
397 | show_sensor2_limit, NULL); | |
398 | static DEVICE_ATTR(sensor1_location, S_IRUGO, | |
399 | show_sensor1_location, NULL); | |
400 | static DEVICE_ATTR(sensor2_location, S_IRUGO, | |
401 | show_sensor2_location, NULL); | |
1da177e4 LT |
402 | |
403 | static DEVICE_ATTR(specified_fan_speed, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, | |
404 | show_specified_fan_speed,store_specified_fan_speed); | |
405 | ||
d20c507f CL |
406 | static DEVICE_ATTR(sensor1_fan_speed, S_IRUGO, |
407 | show_sensor1_fan_speed, NULL); | |
408 | static DEVICE_ATTR(sensor2_fan_speed, S_IRUGO, | |
409 | show_sensor2_fan_speed, NULL); | |
1da177e4 LT |
410 | |
411 | static DEVICE_ATTR(limit_adjust, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH, | |
412 | show_limit_adjust, store_limit_adjust); | |
413 | ||
7a4b15cd | 414 | static void thermostat_create_files(struct thermostat *th) |
1da177e4 | 415 | { |
7a4b15cd BH |
416 | struct device_node *np = th->clt->dev.of_node; |
417 | struct device *dev; | |
418 | int err; | |
44ea9c80 | 419 | |
7a4b15cd BH |
420 | /* To maintain ABI compatibility with userspace, create |
421 | * the old style platform driver and attach the attributes | |
422 | * to it here | |
423 | */ | |
424 | th->pdev = of_platform_device_create(np, "temperatures", NULL); | |
425 | if (!th->pdev) | |
426 | return; | |
427 | dev = &th->pdev->dev; | |
428 | dev_set_drvdata(dev, th); | |
429 | err = device_create_file(dev, &dev_attr_sensor1_temperature); | |
430 | err |= device_create_file(dev, &dev_attr_sensor2_temperature); | |
431 | err |= device_create_file(dev, &dev_attr_sensor1_limit); | |
432 | err |= device_create_file(dev, &dev_attr_sensor2_limit); | |
433 | err |= device_create_file(dev, &dev_attr_sensor1_location); | |
434 | err |= device_create_file(dev, &dev_attr_sensor2_location); | |
435 | err |= device_create_file(dev, &dev_attr_limit_adjust); | |
436 | err |= device_create_file(dev, &dev_attr_specified_fan_speed); | |
437 | err |= device_create_file(dev, &dev_attr_sensor1_fan_speed); | |
438 | if(th->type == ADT7460) | |
439 | err |= device_create_file(dev, &dev_attr_sensor2_fan_speed); | |
440 | if (err) | |
441 | printk(KERN_WARNING | |
442 | "Failed to create temperature attribute file(s).\n"); | |
443 | } | |
a8bacec0 | 444 | |
7a4b15cd BH |
445 | static void thermostat_remove_files(struct thermostat *th) |
446 | { | |
447 | struct device *dev; | |
1da177e4 | 448 | |
7a4b15cd BH |
449 | if (!th->pdev) |
450 | return; | |
451 | dev = &th->pdev->dev; | |
452 | device_remove_file(dev, &dev_attr_sensor1_temperature); | |
453 | device_remove_file(dev, &dev_attr_sensor2_temperature); | |
454 | device_remove_file(dev, &dev_attr_sensor1_limit); | |
455 | device_remove_file(dev, &dev_attr_sensor2_limit); | |
456 | device_remove_file(dev, &dev_attr_sensor1_location); | |
457 | device_remove_file(dev, &dev_attr_sensor2_location); | |
458 | device_remove_file(dev, &dev_attr_limit_adjust); | |
459 | device_remove_file(dev, &dev_attr_specified_fan_speed); | |
460 | device_remove_file(dev, &dev_attr_sensor1_fan_speed); | |
461 | if (th->type == ADT7460) | |
462 | device_remove_file(dev, &dev_attr_sensor2_fan_speed); | |
463 | of_device_unregister(th->pdev); | |
1da177e4 | 464 | |
7a4b15cd | 465 | } |
1da177e4 | 466 | |
7a4b15cd BH |
467 | static int probe_thermostat(struct i2c_client *client, |
468 | const struct i2c_device_id *id) | |
469 | { | |
470 | struct device_node *np = client->dev.of_node; | |
471 | struct thermostat* th; | |
472 | const __be32 *prop; | |
473 | int i, rc, vers, offset = 0; | |
1da177e4 | 474 | |
7a4b15cd BH |
475 | if (!np) |
476 | return -ENXIO; | |
477 | prop = of_get_property(np, "hwsensor-params-version", NULL); | |
478 | if (!prop) | |
479 | return -ENXIO; | |
480 | vers = be32_to_cpup(prop); | |
481 | printk(KERN_INFO "adt746x: version %d (%ssupported)\n", | |
482 | vers, vers == 1 ? "" : "un"); | |
483 | if (vers != 1) | |
484 | return -ENXIO; | |
1da177e4 | 485 | |
01b2726d | 486 | if (of_get_property(np, "hwsensor-location", NULL)) { |
d20c507f | 487 | for (i = 0; i < 3; i++) { |
01b2726d | 488 | sensor_location[i] = of_get_property(np, |
d20c507f CL |
489 | "hwsensor-location", NULL) + offset; |
490 | ||
491 | if (sensor_location[i] == NULL) | |
492 | sensor_location[i] = ""; | |
493 | ||
494 | printk(KERN_INFO "sensor %d: %s\n", i, sensor_location[i]); | |
495 | offset += strlen(sensor_location[i]) + 1; | |
496 | } | |
d20c507f CL |
497 | } |
498 | ||
7a4b15cd BH |
499 | th = kzalloc(sizeof(struct thermostat), GFP_KERNEL); |
500 | if (!th) | |
501 | return -ENOMEM; | |
502 | ||
503 | i2c_set_clientdata(client, th); | |
504 | th->clt = client; | |
505 | th->type = id->driver_data; | |
44ea9c80 | 506 | |
7a4b15cd BH |
507 | rc = read_reg(th, CONFIG_REG); |
508 | if (rc < 0) { | |
509 | dev_err(&client->dev, "Thermostat failed to read config!\n"); | |
510 | kfree(th); | |
1da177e4 LT |
511 | return -ENODEV; |
512 | } | |
44ea9c80 | 513 | |
7a4b15cd BH |
514 | /* force manual control to start the fan quieter */ |
515 | if (fan_speed == -1) | |
516 | fan_speed = 64; | |
517 | ||
518 | if (th->type == ADT7460) { | |
519 | printk(KERN_INFO "adt746x: ADT7460 initializing\n"); | |
520 | /* The 7460 needs to be started explicitly */ | |
521 | write_reg(th, CONFIG_REG, 1); | |
522 | } else | |
523 | printk(KERN_INFO "adt746x: ADT7467 initializing\n"); | |
33a470f6 | 524 | |
7a4b15cd BH |
525 | for (i = 0; i < 3; i++) { |
526 | th->initial_limits[i] = read_reg(th, LIMIT_REG[i]); | |
527 | set_limit(th, i); | |
528 | } | |
529 | ||
530 | printk(KERN_INFO "adt746x: Lowering max temperatures from %d, %d, %d" | |
531 | " to %d, %d, %d\n", | |
532 | th->initial_limits[0], th->initial_limits[1], | |
533 | th->initial_limits[2], th->limits[0], th->limits[1], | |
534 | th->limits[2]); | |
535 | ||
536 | /* record invert bit status because fw can corrupt it after suspend */ | |
537 | th->pwm_inv[0] = read_reg(th, MANUAL_MODE[0]) & INVERT_MASK; | |
538 | th->pwm_inv[1] = read_reg(th, MANUAL_MODE[1]) & INVERT_MASK; | |
539 | ||
540 | /* be sure to really write fan speed the first time */ | |
541 | th->last_speed[0] = -2; | |
542 | th->last_speed[1] = -2; | |
543 | th->last_var[0] = -80; | |
544 | th->last_var[1] = -80; | |
545 | ||
546 | if (fan_speed != -1) { | |
547 | /* manual mode, stop fans */ | |
548 | write_both_fan_speed(th, 0); | |
549 | } else { | |
550 | /* automatic mode */ | |
551 | write_both_fan_speed(th, -1); | |
552 | } | |
553 | ||
554 | th->thread = kthread_run(monitor_task, th, "kfand"); | |
555 | if (th->thread == ERR_PTR(-ENOMEM)) { | |
556 | printk(KERN_INFO "adt746x: Kthread creation failed\n"); | |
557 | th->thread = NULL; | |
558 | return -ENOMEM; | |
559 | } | |
560 | ||
561 | thermostat_create_files(th); | |
562 | ||
563 | return 0; | |
33a470f6 JD |
564 | } |
565 | ||
7a4b15cd | 566 | static int remove_thermostat(struct i2c_client *client) |
33a470f6 | 567 | { |
7a4b15cd BH |
568 | struct thermostat *th = i2c_get_clientdata(client); |
569 | int i; | |
570 | ||
571 | thermostat_remove_files(th); | |
33a470f6 | 572 | |
7a4b15cd BH |
573 | if (th->thread != NULL) |
574 | kthread_stop(th->thread); | |
575 | ||
576 | printk(KERN_INFO "adt746x: Putting max temperatures back from " | |
577 | "%d, %d, %d to %d, %d, %d\n", | |
578 | th->limits[0], th->limits[1], th->limits[2], | |
579 | th->initial_limits[0], th->initial_limits[1], | |
580 | th->initial_limits[2]); | |
581 | ||
582 | for (i = 0; i < 3; i++) | |
583 | write_reg(th, LIMIT_REG[i], th->initial_limits[i]); | |
584 | ||
585 | write_both_fan_speed(th, -1); | |
586 | ||
587 | kfree(th); | |
588 | ||
589 | return 0; | |
1da177e4 LT |
590 | } |
591 | ||
7a4b15cd BH |
592 | static const struct i2c_device_id therm_adt746x_id[] = { |
593 | { "MAC,adt7460", ADT7460 }, | |
594 | { "MAC,adt7467", ADT7467 }, | |
595 | { } | |
596 | }; | |
597 | MODULE_DEVICE_TABLE(i2c, therm_adt746x_id); | |
598 | ||
599 | static struct i2c_driver thermostat_driver = { | |
600 | .driver = { | |
601 | .name = "therm_adt746x", | |
602 | }, | |
603 | .probe = probe_thermostat, | |
604 | .remove = remove_thermostat, | |
605 | .id_table = therm_adt746x_id, | |
606 | }; | |
607 | ||
608 | static int __init thermostat_init(void) | |
1da177e4 | 609 | { |
7a4b15cd BH |
610 | #ifndef CONFIG_I2C_POWERMAC |
611 | request_module("i2c-powermac"); | |
612 | #endif | |
1da177e4 | 613 | |
7a4b15cd | 614 | return i2c_add_driver(&thermostat_driver); |
33a470f6 JD |
615 | } |
616 | ||
7a4b15cd | 617 | static void __exit thermostat_exit(void) |
33a470f6 | 618 | { |
1da177e4 LT |
619 | i2c_del_driver(&thermostat_driver); |
620 | } | |
621 | ||
622 | module_init(thermostat_init); | |
623 | module_exit(thermostat_exit); |