Commit | Line | Data |
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75722d39 BH |
1 | /* |
2 | * Windfarm PowerMac thermal control. SMU based 1 CPU desktop control loops | |
3 | * | |
4 | * (c) Copyright 2005 Benjamin Herrenschmidt, IBM Corp. | |
5 | * <benh@kernel.crashing.org> | |
6 | * | |
7 | * Released under the term of the GNU GPL v2. | |
8 | * | |
9 | * The algorithm used is the PID control algorithm, used the same | |
10 | * way the published Darwin code does, using the same values that | |
11 | * are present in the Darwin 8.2 snapshot property lists (note however | |
12 | * that none of the code has been re-used, it's a complete re-implementation | |
13 | * | |
14 | * The various control loops found in Darwin config file are: | |
15 | * | |
16 | * PowerMac9,1 | |
17 | * =========== | |
18 | * | |
19 | * Has 3 control loops: CPU fans is similar to PowerMac8,1 (though it doesn't | |
20 | * try to play with other control loops fans). Drive bay is rather basic PID | |
21 | * with one sensor and one fan. Slots area is a bit different as the Darwin | |
22 | * driver is supposed to be capable of working in a special "AGP" mode which | |
23 | * involves the presence of an AGP sensor and an AGP fan (possibly on the | |
24 | * AGP card itself). I can't deal with that special mode as I don't have | |
25 | * access to those additional sensor/fans for now (though ultimately, it would | |
26 | * be possible to add sensor objects for them) so I'm only implementing the | |
27 | * basic PCI slot control loop | |
28 | */ | |
29 | ||
30 | #include <linux/types.h> | |
31 | #include <linux/errno.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/delay.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/init.h> | |
36 | #include <linux/spinlock.h> | |
37 | #include <linux/wait.h> | |
38 | #include <linux/kmod.h> | |
39 | #include <linux/device.h> | |
40 | #include <linux/platform_device.h> | |
41 | #include <asm/prom.h> | |
42 | #include <asm/machdep.h> | |
43 | #include <asm/io.h> | |
75722d39 BH |
44 | #include <asm/sections.h> |
45 | #include <asm/smu.h> | |
46 | ||
47 | #include "windfarm.h" | |
48 | #include "windfarm_pid.h" | |
49 | ||
50 | #define VERSION "0.4" | |
51 | ||
52 | #undef DEBUG | |
53 | ||
54 | #ifdef DEBUG | |
55 | #define DBG(args...) printk(args) | |
56 | #else | |
57 | #define DBG(args...) do { } while(0) | |
58 | #endif | |
59 | ||
60 | /* define this to force CPU overtemp to 74 degree, useful for testing | |
61 | * the overtemp code | |
62 | */ | |
63 | #undef HACKED_OVERTEMP | |
64 | ||
75722d39 BH |
65 | /* Controls & sensors */ |
66 | static struct wf_sensor *sensor_cpu_power; | |
67 | static struct wf_sensor *sensor_cpu_temp; | |
68 | static struct wf_sensor *sensor_hd_temp; | |
69 | static struct wf_sensor *sensor_slots_power; | |
70 | static struct wf_control *fan_cpu_main; | |
71 | static struct wf_control *fan_cpu_second; | |
72 | static struct wf_control *fan_cpu_third; | |
73 | static struct wf_control *fan_hd; | |
74 | static struct wf_control *fan_slots; | |
75 | static struct wf_control *cpufreq_clamp; | |
76 | ||
77 | /* Set to kick the control loop into life */ | |
78 | static int wf_smu_all_controls_ok, wf_smu_all_sensors_ok, wf_smu_started; | |
79 | ||
80 | /* Failure handling.. could be nicer */ | |
81 | #define FAILURE_FAN 0x01 | |
82 | #define FAILURE_SENSOR 0x02 | |
83 | #define FAILURE_OVERTEMP 0x04 | |
84 | ||
85 | static unsigned int wf_smu_failure_state; | |
86 | static int wf_smu_readjust, wf_smu_skipping; | |
87 | ||
88 | /* | |
89 | * ****** CPU Fans Control Loop ****** | |
90 | * | |
91 | */ | |
92 | ||
93 | ||
94 | #define WF_SMU_CPU_FANS_INTERVAL 1 | |
95 | #define WF_SMU_CPU_FANS_MAX_HISTORY 16 | |
96 | ||
97 | /* State data used by the cpu fans control loop | |
98 | */ | |
99 | struct wf_smu_cpu_fans_state { | |
100 | int ticks; | |
101 | s32 cpu_setpoint; | |
102 | struct wf_cpu_pid_state pid; | |
103 | }; | |
104 | ||
105 | static struct wf_smu_cpu_fans_state *wf_smu_cpu_fans; | |
106 | ||
107 | ||
108 | ||
109 | /* | |
110 | * ****** Drive Fan Control Loop ****** | |
111 | * | |
112 | */ | |
113 | ||
114 | struct wf_smu_drive_fans_state { | |
115 | int ticks; | |
116 | s32 setpoint; | |
117 | struct wf_pid_state pid; | |
118 | }; | |
119 | ||
120 | static struct wf_smu_drive_fans_state *wf_smu_drive_fans; | |
121 | ||
122 | /* | |
123 | * ****** Slots Fan Control Loop ****** | |
124 | * | |
125 | */ | |
126 | ||
127 | struct wf_smu_slots_fans_state { | |
128 | int ticks; | |
129 | s32 setpoint; | |
130 | struct wf_pid_state pid; | |
131 | }; | |
132 | ||
133 | static struct wf_smu_slots_fans_state *wf_smu_slots_fans; | |
134 | ||
135 | /* | |
136 | * ***** Implementation ***** | |
137 | * | |
138 | */ | |
139 | ||
140 | ||
141 | static void wf_smu_create_cpu_fans(void) | |
142 | { | |
143 | struct wf_cpu_pid_param pid_param; | |
018a3d1d | 144 | const struct smu_sdbp_header *hdr; |
75722d39 BH |
145 | struct smu_sdbp_cpupiddata *piddata; |
146 | struct smu_sdbp_fvt *fvt; | |
147 | s32 tmax, tdelta, maxpow, powadj; | |
148 | ||
149 | /* First, locate the PID params in SMU SBD */ | |
150 | hdr = smu_get_sdb_partition(SMU_SDB_CPUPIDDATA_ID, NULL); | |
151 | if (hdr == 0) { | |
152 | printk(KERN_WARNING "windfarm: CPU PID fan config not found " | |
153 | "max fan speed\n"); | |
154 | goto fail; | |
155 | } | |
156 | piddata = (struct smu_sdbp_cpupiddata *)&hdr[1]; | |
157 | ||
158 | /* Get the FVT params for operating point 0 (the only supported one | |
159 | * for now) in order to get tmax | |
160 | */ | |
161 | hdr = smu_get_sdb_partition(SMU_SDB_FVT_ID, NULL); | |
162 | if (hdr) { | |
163 | fvt = (struct smu_sdbp_fvt *)&hdr[1]; | |
164 | tmax = ((s32)fvt->maxtemp) << 16; | |
165 | } else | |
166 | tmax = 0x5e0000; /* 94 degree default */ | |
167 | ||
168 | /* Alloc & initialize state */ | |
169 | wf_smu_cpu_fans = kmalloc(sizeof(struct wf_smu_cpu_fans_state), | |
170 | GFP_KERNEL); | |
171 | if (wf_smu_cpu_fans == NULL) | |
172 | goto fail; | |
173 | wf_smu_cpu_fans->ticks = 1; | |
174 | ||
175 | /* Fill PID params */ | |
176 | pid_param.interval = WF_SMU_CPU_FANS_INTERVAL; | |
177 | pid_param.history_len = piddata->history_len; | |
178 | if (pid_param.history_len > WF_CPU_PID_MAX_HISTORY) { | |
179 | printk(KERN_WARNING "windfarm: History size overflow on " | |
180 | "CPU control loop (%d)\n", piddata->history_len); | |
181 | pid_param.history_len = WF_CPU_PID_MAX_HISTORY; | |
182 | } | |
183 | pid_param.gd = piddata->gd; | |
184 | pid_param.gp = piddata->gp; | |
185 | pid_param.gr = piddata->gr / pid_param.history_len; | |
186 | ||
187 | tdelta = ((s32)piddata->target_temp_delta) << 16; | |
188 | maxpow = ((s32)piddata->max_power) << 16; | |
189 | powadj = ((s32)piddata->power_adj) << 16; | |
190 | ||
191 | pid_param.tmax = tmax; | |
192 | pid_param.ttarget = tmax - tdelta; | |
193 | pid_param.pmaxadj = maxpow - powadj; | |
194 | ||
33e6820b BH |
195 | pid_param.min = wf_control_get_min(fan_cpu_main); |
196 | pid_param.max = wf_control_get_max(fan_cpu_main); | |
75722d39 BH |
197 | |
198 | wf_cpu_pid_init(&wf_smu_cpu_fans->pid, &pid_param); | |
199 | ||
200 | DBG("wf: CPU Fan control initialized.\n"); | |
201 | DBG(" ttarged=%d.%03d, tmax=%d.%03d, min=%d RPM, max=%d RPM\n", | |
202 | FIX32TOPRINT(pid_param.ttarget), FIX32TOPRINT(pid_param.tmax), | |
203 | pid_param.min, pid_param.max); | |
204 | ||
205 | return; | |
206 | ||
207 | fail: | |
208 | printk(KERN_WARNING "windfarm: CPU fan config not found\n" | |
209 | "for this machine model, max fan speed\n"); | |
210 | ||
211 | if (cpufreq_clamp) | |
212 | wf_control_set_max(cpufreq_clamp); | |
213 | if (fan_cpu_main) | |
214 | wf_control_set_max(fan_cpu_main); | |
215 | } | |
216 | ||
217 | static void wf_smu_cpu_fans_tick(struct wf_smu_cpu_fans_state *st) | |
218 | { | |
219 | s32 new_setpoint, temp, power; | |
220 | int rc; | |
221 | ||
222 | if (--st->ticks != 0) { | |
223 | if (wf_smu_readjust) | |
224 | goto readjust; | |
225 | return; | |
226 | } | |
227 | st->ticks = WF_SMU_CPU_FANS_INTERVAL; | |
228 | ||
33e6820b | 229 | rc = wf_sensor_get(sensor_cpu_temp, &temp); |
75722d39 BH |
230 | if (rc) { |
231 | printk(KERN_WARNING "windfarm: CPU temp sensor error %d\n", | |
232 | rc); | |
233 | wf_smu_failure_state |= FAILURE_SENSOR; | |
234 | return; | |
235 | } | |
236 | ||
ca7d593e | 237 | rc = wf_sensor_get(sensor_cpu_power, &power); |
75722d39 BH |
238 | if (rc) { |
239 | printk(KERN_WARNING "windfarm: CPU power sensor error %d\n", | |
240 | rc); | |
241 | wf_smu_failure_state |= FAILURE_SENSOR; | |
242 | return; | |
243 | } | |
244 | ||
245 | DBG("wf_smu: CPU Fans tick ! CPU temp: %d.%03d, power: %d.%03d\n", | |
246 | FIX32TOPRINT(temp), FIX32TOPRINT(power)); | |
247 | ||
248 | #ifdef HACKED_OVERTEMP | |
249 | if (temp > 0x4a0000) | |
250 | wf_smu_failure_state |= FAILURE_OVERTEMP; | |
251 | #else | |
252 | if (temp > st->pid.param.tmax) | |
253 | wf_smu_failure_state |= FAILURE_OVERTEMP; | |
254 | #endif | |
255 | new_setpoint = wf_cpu_pid_run(&st->pid, power, temp); | |
256 | ||
257 | DBG("wf_smu: new_setpoint: %d RPM\n", (int)new_setpoint); | |
258 | ||
259 | if (st->cpu_setpoint == new_setpoint) | |
260 | return; | |
261 | st->cpu_setpoint = new_setpoint; | |
262 | readjust: | |
263 | if (fan_cpu_main && wf_smu_failure_state == 0) { | |
33e6820b | 264 | rc = wf_control_set(fan_cpu_main, st->cpu_setpoint); |
75722d39 BH |
265 | if (rc) { |
266 | printk(KERN_WARNING "windfarm: CPU main fan" | |
267 | " error %d\n", rc); | |
268 | wf_smu_failure_state |= FAILURE_FAN; | |
269 | } | |
270 | } | |
271 | if (fan_cpu_second && wf_smu_failure_state == 0) { | |
33e6820b | 272 | rc = wf_control_set(fan_cpu_second, st->cpu_setpoint); |
75722d39 BH |
273 | if (rc) { |
274 | printk(KERN_WARNING "windfarm: CPU second fan" | |
275 | " error %d\n", rc); | |
276 | wf_smu_failure_state |= FAILURE_FAN; | |
277 | } | |
278 | } | |
279 | if (fan_cpu_third && wf_smu_failure_state == 0) { | |
33e6820b | 280 | rc = wf_control_set(fan_cpu_third, st->cpu_setpoint); |
75722d39 BH |
281 | if (rc) { |
282 | printk(KERN_WARNING "windfarm: CPU third fan" | |
283 | " error %d\n", rc); | |
284 | wf_smu_failure_state |= FAILURE_FAN; | |
285 | } | |
286 | } | |
287 | } | |
288 | ||
289 | static void wf_smu_create_drive_fans(void) | |
290 | { | |
291 | struct wf_pid_param param = { | |
292 | .interval = 5, | |
293 | .history_len = 2, | |
294 | .gd = 0x01e00000, | |
295 | .gp = 0x00500000, | |
296 | .gr = 0x00000000, | |
297 | .itarget = 0x00200000, | |
298 | }; | |
299 | ||
300 | /* Alloc & initialize state */ | |
301 | wf_smu_drive_fans = kmalloc(sizeof(struct wf_smu_drive_fans_state), | |
302 | GFP_KERNEL); | |
303 | if (wf_smu_drive_fans == NULL) { | |
304 | printk(KERN_WARNING "windfarm: Memory allocation error" | |
305 | " max fan speed\n"); | |
306 | goto fail; | |
307 | } | |
308 | wf_smu_drive_fans->ticks = 1; | |
309 | ||
310 | /* Fill PID params */ | |
311 | param.additive = (fan_hd->type == WF_CONTROL_RPM_FAN); | |
33e6820b BH |
312 | param.min = wf_control_get_min(fan_hd); |
313 | param.max = wf_control_get_max(fan_hd); | |
75722d39 BH |
314 | wf_pid_init(&wf_smu_drive_fans->pid, ¶m); |
315 | ||
316 | DBG("wf: Drive Fan control initialized.\n"); | |
317 | DBG(" itarged=%d.%03d, min=%d RPM, max=%d RPM\n", | |
318 | FIX32TOPRINT(param.itarget), param.min, param.max); | |
319 | return; | |
320 | ||
321 | fail: | |
322 | if (fan_hd) | |
323 | wf_control_set_max(fan_hd); | |
324 | } | |
325 | ||
326 | static void wf_smu_drive_fans_tick(struct wf_smu_drive_fans_state *st) | |
327 | { | |
328 | s32 new_setpoint, temp; | |
329 | int rc; | |
330 | ||
331 | if (--st->ticks != 0) { | |
332 | if (wf_smu_readjust) | |
333 | goto readjust; | |
334 | return; | |
335 | } | |
336 | st->ticks = st->pid.param.interval; | |
337 | ||
33e6820b | 338 | rc = wf_sensor_get(sensor_hd_temp, &temp); |
75722d39 BH |
339 | if (rc) { |
340 | printk(KERN_WARNING "windfarm: HD temp sensor error %d\n", | |
341 | rc); | |
342 | wf_smu_failure_state |= FAILURE_SENSOR; | |
343 | return; | |
344 | } | |
345 | ||
346 | DBG("wf_smu: Drive Fans tick ! HD temp: %d.%03d\n", | |
347 | FIX32TOPRINT(temp)); | |
348 | ||
349 | if (temp > (st->pid.param.itarget + 0x50000)) | |
350 | wf_smu_failure_state |= FAILURE_OVERTEMP; | |
351 | ||
352 | new_setpoint = wf_pid_run(&st->pid, temp); | |
353 | ||
354 | DBG("wf_smu: new_setpoint: %d\n", (int)new_setpoint); | |
355 | ||
356 | if (st->setpoint == new_setpoint) | |
357 | return; | |
358 | st->setpoint = new_setpoint; | |
359 | readjust: | |
360 | if (fan_hd && wf_smu_failure_state == 0) { | |
33e6820b | 361 | rc = wf_control_set(fan_hd, st->setpoint); |
75722d39 BH |
362 | if (rc) { |
363 | printk(KERN_WARNING "windfarm: HD fan error %d\n", | |
364 | rc); | |
365 | wf_smu_failure_state |= FAILURE_FAN; | |
366 | } | |
367 | } | |
368 | } | |
369 | ||
370 | static void wf_smu_create_slots_fans(void) | |
371 | { | |
372 | struct wf_pid_param param = { | |
373 | .interval = 1, | |
374 | .history_len = 8, | |
375 | .gd = 0x00000000, | |
376 | .gp = 0x00000000, | |
377 | .gr = 0x00020000, | |
378 | .itarget = 0x00000000 | |
379 | }; | |
380 | ||
381 | /* Alloc & initialize state */ | |
382 | wf_smu_slots_fans = kmalloc(sizeof(struct wf_smu_slots_fans_state), | |
383 | GFP_KERNEL); | |
384 | if (wf_smu_slots_fans == NULL) { | |
385 | printk(KERN_WARNING "windfarm: Memory allocation error" | |
386 | " max fan speed\n"); | |
387 | goto fail; | |
388 | } | |
389 | wf_smu_slots_fans->ticks = 1; | |
390 | ||
391 | /* Fill PID params */ | |
392 | param.additive = (fan_slots->type == WF_CONTROL_RPM_FAN); | |
33e6820b BH |
393 | param.min = wf_control_get_min(fan_slots); |
394 | param.max = wf_control_get_max(fan_slots); | |
75722d39 BH |
395 | wf_pid_init(&wf_smu_slots_fans->pid, ¶m); |
396 | ||
397 | DBG("wf: Slots Fan control initialized.\n"); | |
398 | DBG(" itarged=%d.%03d, min=%d RPM, max=%d RPM\n", | |
399 | FIX32TOPRINT(param.itarget), param.min, param.max); | |
400 | return; | |
401 | ||
402 | fail: | |
403 | if (fan_slots) | |
404 | wf_control_set_max(fan_slots); | |
405 | } | |
406 | ||
407 | static void wf_smu_slots_fans_tick(struct wf_smu_slots_fans_state *st) | |
408 | { | |
409 | s32 new_setpoint, power; | |
410 | int rc; | |
411 | ||
412 | if (--st->ticks != 0) { | |
413 | if (wf_smu_readjust) | |
414 | goto readjust; | |
415 | return; | |
416 | } | |
417 | st->ticks = st->pid.param.interval; | |
418 | ||
33e6820b | 419 | rc = wf_sensor_get(sensor_slots_power, &power); |
75722d39 BH |
420 | if (rc) { |
421 | printk(KERN_WARNING "windfarm: Slots power sensor error %d\n", | |
422 | rc); | |
423 | wf_smu_failure_state |= FAILURE_SENSOR; | |
424 | return; | |
425 | } | |
426 | ||
427 | DBG("wf_smu: Slots Fans tick ! Slots power: %d.%03d\n", | |
428 | FIX32TOPRINT(power)); | |
429 | ||
430 | #if 0 /* Check what makes a good overtemp condition */ | |
431 | if (power > (st->pid.param.itarget + 0x50000)) | |
432 | wf_smu_failure_state |= FAILURE_OVERTEMP; | |
433 | #endif | |
434 | ||
435 | new_setpoint = wf_pid_run(&st->pid, power); | |
436 | ||
437 | DBG("wf_smu: new_setpoint: %d\n", (int)new_setpoint); | |
438 | ||
439 | if (st->setpoint == new_setpoint) | |
440 | return; | |
441 | st->setpoint = new_setpoint; | |
442 | readjust: | |
443 | if (fan_slots && wf_smu_failure_state == 0) { | |
33e6820b | 444 | rc = wf_control_set(fan_slots, st->setpoint); |
75722d39 BH |
445 | if (rc) { |
446 | printk(KERN_WARNING "windfarm: Slots fan error %d\n", | |
447 | rc); | |
448 | wf_smu_failure_state |= FAILURE_FAN; | |
449 | } | |
450 | } | |
451 | } | |
452 | ||
453 | ||
75722d39 BH |
454 | /* |
455 | * ****** Setup / Init / Misc ... ****** | |
456 | * | |
457 | */ | |
458 | ||
459 | static void wf_smu_tick(void) | |
460 | { | |
461 | unsigned int last_failure = wf_smu_failure_state; | |
462 | unsigned int new_failure; | |
463 | ||
464 | if (!wf_smu_started) { | |
465 | DBG("wf: creating control loops !\n"); | |
466 | wf_smu_create_drive_fans(); | |
467 | wf_smu_create_slots_fans(); | |
468 | wf_smu_create_cpu_fans(); | |
469 | wf_smu_started = 1; | |
470 | } | |
471 | ||
472 | /* Skipping ticks */ | |
473 | if (wf_smu_skipping && --wf_smu_skipping) | |
474 | return; | |
475 | ||
476 | wf_smu_failure_state = 0; | |
477 | if (wf_smu_drive_fans) | |
478 | wf_smu_drive_fans_tick(wf_smu_drive_fans); | |
479 | if (wf_smu_slots_fans) | |
480 | wf_smu_slots_fans_tick(wf_smu_slots_fans); | |
481 | if (wf_smu_cpu_fans) | |
482 | wf_smu_cpu_fans_tick(wf_smu_cpu_fans); | |
483 | ||
484 | wf_smu_readjust = 0; | |
485 | new_failure = wf_smu_failure_state & ~last_failure; | |
486 | ||
487 | /* If entering failure mode, clamp cpufreq and ramp all | |
488 | * fans to full speed. | |
489 | */ | |
490 | if (wf_smu_failure_state && !last_failure) { | |
491 | if (cpufreq_clamp) | |
492 | wf_control_set_max(cpufreq_clamp); | |
493 | if (fan_cpu_main) | |
494 | wf_control_set_max(fan_cpu_main); | |
495 | if (fan_cpu_second) | |
496 | wf_control_set_max(fan_cpu_second); | |
497 | if (fan_cpu_third) | |
498 | wf_control_set_max(fan_cpu_third); | |
499 | if (fan_hd) | |
500 | wf_control_set_max(fan_hd); | |
501 | if (fan_slots) | |
502 | wf_control_set_max(fan_slots); | |
503 | } | |
504 | ||
505 | /* If leaving failure mode, unclamp cpufreq and readjust | |
506 | * all fans on next iteration | |
507 | */ | |
508 | if (!wf_smu_failure_state && last_failure) { | |
509 | if (cpufreq_clamp) | |
510 | wf_control_set_min(cpufreq_clamp); | |
511 | wf_smu_readjust = 1; | |
512 | } | |
513 | ||
514 | /* Overtemp condition detected, notify and start skipping a couple | |
515 | * ticks to let the temperature go down | |
516 | */ | |
517 | if (new_failure & FAILURE_OVERTEMP) { | |
518 | wf_set_overtemp(); | |
519 | wf_smu_skipping = 2; | |
520 | } | |
521 | ||
522 | /* We only clear the overtemp condition if overtemp is cleared | |
523 | * _and_ no other failure is present. Since a sensor error will | |
524 | * clear the overtemp condition (can't measure temperature) at | |
525 | * the control loop levels, but we don't want to keep it clear | |
526 | * here in this case | |
527 | */ | |
528 | if (new_failure == 0 && last_failure & FAILURE_OVERTEMP) | |
529 | wf_clear_overtemp(); | |
530 | } | |
531 | ||
532 | ||
533 | static void wf_smu_new_control(struct wf_control *ct) | |
534 | { | |
535 | if (wf_smu_all_controls_ok) | |
536 | return; | |
537 | ||
538 | if (fan_cpu_main == NULL && !strcmp(ct->name, "cpu-rear-fan-0")) { | |
ac171c46 | 539 | if (wf_get_control(ct) == 0) |
75722d39 | 540 | fan_cpu_main = ct; |
75722d39 BH |
541 | } |
542 | ||
543 | if (fan_cpu_second == NULL && !strcmp(ct->name, "cpu-rear-fan-1")) { | |
544 | if (wf_get_control(ct) == 0) | |
545 | fan_cpu_second = ct; | |
546 | } | |
547 | ||
548 | if (fan_cpu_third == NULL && !strcmp(ct->name, "cpu-front-fan-0")) { | |
549 | if (wf_get_control(ct) == 0) | |
550 | fan_cpu_third = ct; | |
551 | } | |
552 | ||
553 | if (cpufreq_clamp == NULL && !strcmp(ct->name, "cpufreq-clamp")) { | |
554 | if (wf_get_control(ct) == 0) | |
555 | cpufreq_clamp = ct; | |
556 | } | |
557 | ||
558 | if (fan_hd == NULL && !strcmp(ct->name, "drive-bay-fan")) { | |
ac171c46 | 559 | if (wf_get_control(ct) == 0) |
75722d39 | 560 | fan_hd = ct; |
75722d39 BH |
561 | } |
562 | ||
563 | if (fan_slots == NULL && !strcmp(ct->name, "slots-fan")) { | |
ac171c46 | 564 | if (wf_get_control(ct) == 0) |
75722d39 | 565 | fan_slots = ct; |
75722d39 BH |
566 | } |
567 | ||
568 | if (fan_cpu_main && (fan_cpu_second || fan_cpu_third) && fan_hd && | |
569 | fan_slots && cpufreq_clamp) | |
570 | wf_smu_all_controls_ok = 1; | |
571 | } | |
572 | ||
573 | static void wf_smu_new_sensor(struct wf_sensor *sr) | |
574 | { | |
575 | if (wf_smu_all_sensors_ok) | |
576 | return; | |
577 | ||
578 | if (sensor_cpu_power == NULL && !strcmp(sr->name, "cpu-power")) { | |
ac171c46 | 579 | if (wf_get_sensor(sr) == 0) |
75722d39 | 580 | sensor_cpu_power = sr; |
75722d39 BH |
581 | } |
582 | ||
583 | if (sensor_cpu_temp == NULL && !strcmp(sr->name, "cpu-temp")) { | |
ac171c46 | 584 | if (wf_get_sensor(sr) == 0) |
75722d39 | 585 | sensor_cpu_temp = sr; |
75722d39 BH |
586 | } |
587 | ||
588 | if (sensor_hd_temp == NULL && !strcmp(sr->name, "hd-temp")) { | |
ac171c46 | 589 | if (wf_get_sensor(sr) == 0) |
75722d39 | 590 | sensor_hd_temp = sr; |
75722d39 BH |
591 | } |
592 | ||
593 | if (sensor_slots_power == NULL && !strcmp(sr->name, "slots-power")) { | |
ac171c46 | 594 | if (wf_get_sensor(sr) == 0) |
75722d39 | 595 | sensor_slots_power = sr; |
75722d39 BH |
596 | } |
597 | ||
598 | if (sensor_cpu_power && sensor_cpu_temp && | |
599 | sensor_hd_temp && sensor_slots_power) | |
600 | wf_smu_all_sensors_ok = 1; | |
601 | } | |
602 | ||
603 | ||
604 | static int wf_smu_notify(struct notifier_block *self, | |
605 | unsigned long event, void *data) | |
606 | { | |
607 | switch(event) { | |
608 | case WF_EVENT_NEW_CONTROL: | |
609 | DBG("wf: new control %s detected\n", | |
610 | ((struct wf_control *)data)->name); | |
611 | wf_smu_new_control(data); | |
612 | wf_smu_readjust = 1; | |
613 | break; | |
614 | case WF_EVENT_NEW_SENSOR: | |
615 | DBG("wf: new sensor %s detected\n", | |
616 | ((struct wf_sensor *)data)->name); | |
617 | wf_smu_new_sensor(data); | |
618 | break; | |
619 | case WF_EVENT_TICK: | |
620 | if (wf_smu_all_controls_ok && wf_smu_all_sensors_ok) | |
621 | wf_smu_tick(); | |
622 | } | |
623 | ||
624 | return 0; | |
625 | } | |
626 | ||
627 | static struct notifier_block wf_smu_events = { | |
628 | .notifier_call = wf_smu_notify, | |
629 | }; | |
630 | ||
631 | static int wf_init_pm(void) | |
632 | { | |
633 | printk(KERN_INFO "windfarm: Initializing for Desktop G5 model\n"); | |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
10270613 | 638 | static int wf_smu_probe(struct platform_device *ddev) |
75722d39 | 639 | { |
75722d39 BH |
640 | wf_register_client(&wf_smu_events); |
641 | ||
642 | return 0; | |
643 | } | |
644 | ||
10270613 | 645 | static int __devexit wf_smu_remove(struct platform_device *ddev) |
75722d39 BH |
646 | { |
647 | wf_unregister_client(&wf_smu_events); | |
648 | ||
649 | /* XXX We don't have yet a guarantee that our callback isn't | |
650 | * in progress when returning from wf_unregister_client, so | |
651 | * we add an arbitrary delay. I'll have to fix that in the core | |
652 | */ | |
653 | msleep(1000); | |
654 | ||
655 | /* Release all sensors */ | |
656 | /* One more crappy race: I don't think we have any guarantee here | |
657 | * that the attribute callback won't race with the sensor beeing | |
658 | * disposed of, and I'm not 100% certain what best way to deal | |
659 | * with that except by adding locks all over... I'll do that | |
660 | * eventually but heh, who ever rmmod this module anyway ? | |
661 | */ | |
ac171c46 | 662 | if (sensor_cpu_power) |
75722d39 | 663 | wf_put_sensor(sensor_cpu_power); |
ac171c46 | 664 | if (sensor_cpu_temp) |
75722d39 | 665 | wf_put_sensor(sensor_cpu_temp); |
ac171c46 | 666 | if (sensor_hd_temp) |
75722d39 | 667 | wf_put_sensor(sensor_hd_temp); |
ac171c46 | 668 | if (sensor_slots_power) |
75722d39 | 669 | wf_put_sensor(sensor_slots_power); |
75722d39 BH |
670 | |
671 | /* Release all controls */ | |
ac171c46 | 672 | if (fan_cpu_main) |
75722d39 | 673 | wf_put_control(fan_cpu_main); |
75722d39 BH |
674 | if (fan_cpu_second) |
675 | wf_put_control(fan_cpu_second); | |
676 | if (fan_cpu_third) | |
677 | wf_put_control(fan_cpu_third); | |
ac171c46 | 678 | if (fan_hd) |
75722d39 | 679 | wf_put_control(fan_hd); |
ac171c46 | 680 | if (fan_slots) |
75722d39 | 681 | wf_put_control(fan_slots); |
75722d39 BH |
682 | if (cpufreq_clamp) |
683 | wf_put_control(cpufreq_clamp); | |
684 | ||
685 | /* Destroy control loops state structures */ | |
ab30f78c JL |
686 | kfree(wf_smu_slots_fans); |
687 | kfree(wf_smu_drive_fans); | |
688 | kfree(wf_smu_cpu_fans); | |
75722d39 | 689 | |
75722d39 BH |
690 | return 0; |
691 | } | |
692 | ||
10270613 | 693 | static struct platform_driver wf_smu_driver = { |
75722d39 | 694 | .probe = wf_smu_probe, |
10270613 BH |
695 | .remove = __devexit_p(wf_smu_remove), |
696 | .driver = { | |
697 | .name = "windfarm", | |
23386fe5 | 698 | .owner = THIS_MODULE, |
10270613 | 699 | }, |
75722d39 BH |
700 | }; |
701 | ||
702 | ||
703 | static int __init wf_smu_init(void) | |
704 | { | |
705 | int rc = -ENODEV; | |
706 | ||
71a157e8 | 707 | if (of_machine_is_compatible("PowerMac9,1")) |
75722d39 BH |
708 | rc = wf_init_pm(); |
709 | ||
710 | if (rc == 0) { | |
711 | #ifdef MODULE | |
712 | request_module("windfarm_smu_controls"); | |
713 | request_module("windfarm_smu_sensors"); | |
714 | request_module("windfarm_lm75_sensor"); | |
d31e8171 | 715 | request_module("windfarm_cpufreq_clamp"); |
75722d39 BH |
716 | |
717 | #endif /* MODULE */ | |
10270613 | 718 | platform_driver_register(&wf_smu_driver); |
75722d39 BH |
719 | } |
720 | ||
721 | return rc; | |
722 | } | |
723 | ||
724 | static void __exit wf_smu_exit(void) | |
725 | { | |
726 | ||
10270613 | 727 | platform_driver_unregister(&wf_smu_driver); |
75722d39 BH |
728 | } |
729 | ||
730 | ||
731 | module_init(wf_smu_init); | |
732 | module_exit(wf_smu_exit); | |
733 | ||
734 | MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>"); | |
735 | MODULE_DESCRIPTION("Thermal control logic for PowerMac9,1"); | |
736 | MODULE_LICENSE("GPL"); | |
737 | ||
23386fe5 | 738 | MODULE_ALIAS("platform:windfarm"); |