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authorWolfram Sang <wsa@the-dreams.de>2014-11-05 17:44:11 -0500
committerWolfram Sang <wsa@the-dreams.de>2014-12-19 13:32:47 -0500
commitb074cf80a7d40fefe1f4063c9841232171e8daea (patch)
tree6b4a8470f34578e1db3ab8cb22eab77fcc2e13de
parentf16ea4f0e1800a4449ffb2ddc0c01f4c4a5b504e (diff)
macintosh: therm_pm72: delete deprecated driver
The new driver is around for more than 2 years now, so the old one can go. Getting rid of it helps the removal of the legacy .attach_adapter callback of the I2C subsystem. Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat
-rw-r--r--drivers/macintosh/Kconfig10
-rw-r--r--drivers/macintosh/Makefile1
-rw-r--r--drivers/macintosh/therm_pm72.c2278
-rw-r--r--drivers/macintosh/therm_pm72.h326
4 files changed, 0 insertions, 2615 deletions
diff --git a/drivers/macintosh/Kconfig b/drivers/macintosh/Kconfig
index 3067d56b11a6..5844b80bd90e 100644
--- a/drivers/macintosh/Kconfig
+++ b/drivers/macintosh/Kconfig
@@ -204,16 +204,6 @@ config THERM_ADT746X
204 iBook G4, and the ATI based aluminium PowerBooks, allowing slightly 204 iBook G4, and the ATI based aluminium PowerBooks, allowing slightly
205 better fan behaviour by default, and some manual control. 205 better fan behaviour by default, and some manual control.
206 206
207config THERM_PM72
208 tristate "Support for thermal management on PowerMac G5 (AGP)"
209 depends on I2C && I2C_POWERMAC && PPC_PMAC64
210 default n
211 help
212 This driver provides thermostat and fan control for the desktop
213 G5 machines.
214
215 This is deprecated, use windfarm instead.
216
217config WINDFARM 207config WINDFARM
218 tristate "New PowerMac thermal control infrastructure" 208 tristate "New PowerMac thermal control infrastructure"
219 depends on PPC 209 depends on PPC
diff --git a/drivers/macintosh/Makefile b/drivers/macintosh/Makefile
index d2f0120bc878..383ba920085b 100644
--- a/drivers/macintosh/Makefile
+++ b/drivers/macintosh/Makefile
@@ -25,7 +25,6 @@ obj-$(CONFIG_ADB_IOP) += adb-iop.o
25obj-$(CONFIG_ADB_PMU68K) += via-pmu68k.o 25obj-$(CONFIG_ADB_PMU68K) += via-pmu68k.o
26obj-$(CONFIG_ADB_MACIO) += macio-adb.o 26obj-$(CONFIG_ADB_MACIO) += macio-adb.o
27 27
28obj-$(CONFIG_THERM_PM72) += therm_pm72.o
29obj-$(CONFIG_THERM_WINDTUNNEL) += therm_windtunnel.o 28obj-$(CONFIG_THERM_WINDTUNNEL) += therm_windtunnel.o
30obj-$(CONFIG_THERM_ADT746X) += therm_adt746x.o 29obj-$(CONFIG_THERM_ADT746X) += therm_adt746x.o
31obj-$(CONFIG_WINDFARM) += windfarm_core.o 30obj-$(CONFIG_WINDFARM) += windfarm_core.o
diff --git a/drivers/macintosh/therm_pm72.c b/drivers/macintosh/therm_pm72.c
deleted file mode 100644
index 7ed92582d2cf..000000000000
--- a/drivers/macintosh/therm_pm72.c
+++ /dev/null
@@ -1,2278 +0,0 @@
1/*
2 * Device driver for the thermostats & fan controller of the
3 * Apple G5 "PowerMac7,2" desktop machines.
4 *
5 * (c) Copyright IBM Corp. 2003-2004
6 *
7 * Maintained by: Benjamin Herrenschmidt
8 * <benh@kernel.crashing.org>
9 *
10 *
11 * The algorithm used is the PID control algorithm, used the same
12 * way the published Darwin code does, using the same values that
13 * are present in the Darwin 7.0 snapshot property lists.
14 *
15 * As far as the CPUs control loops are concerned, I use the
16 * calibration & PID constants provided by the EEPROM,
17 * I do _not_ embed any value from the property lists, as the ones
18 * provided by Darwin 7.0 seem to always have an older version that
19 * what I've seen on the actual computers.
20 * It would be interesting to verify that though. Darwin has a
21 * version code of 1.0.0d11 for all control loops it seems, while
22 * so far, the machines EEPROMs contain a dataset versioned 1.0.0f
23 *
24 * Darwin doesn't provide source to all parts, some missing
25 * bits like the AppleFCU driver or the actual scale of some
26 * of the values returned by sensors had to be "guessed" some
27 * way... or based on what Open Firmware does.
28 *
29 * I didn't yet figure out how to get the slots power consumption
30 * out of the FCU, so that part has not been implemented yet and
31 * the slots fan is set to a fixed 50% PWM, hoping this value is
32 * safe enough ...
33 *
34 * Note: I have observed strange oscillations of the CPU control
35 * loop on a dual G5 here. When idle, the CPU exhaust fan tend to
36 * oscillates slowly (over several minutes) between the minimum
37 * of 300RPMs and approx. 1000 RPMs. I don't know what is causing
38 * this, it could be some incorrect constant or an error in the
39 * way I ported the algorithm, or it could be just normal. I
40 * don't have full understanding on the way Apple tweaked the PID
41 * algorithm for the CPU control, it is definitely not a standard
42 * implementation...
43 *
44 * TODO: - Check MPU structure version/signature
45 * - Add things like /sbin/overtemp for non-critical
46 * overtemp conditions so userland can take some policy
47 * decisions, like slowing down CPUs
48 * - Deal with fan and i2c failures in a better way
49 * - Maybe do a generic PID based on params used for
50 * U3 and Drives ? Definitely need to factor code a bit
51 * better... also make sensor detection more robust using
52 * the device-tree to probe for them
53 * - Figure out how to get the slots consumption and set the
54 * slots fan accordingly
55 *
56 * History:
57 *
58 * Nov. 13, 2003 : 0.5
59 * - First release
60 *
61 * Nov. 14, 2003 : 0.6
62 * - Read fan speed from FCU, low level fan routines now deal
63 * with errors & check fan status, though higher level don't
64 * do much.
65 * - Move a bunch of definitions to .h file
66 *
67 * Nov. 18, 2003 : 0.7
68 * - Fix build on ppc64 kernel
69 * - Move back statics definitions to .c file
70 * - Avoid calling schedule_timeout with a negative number
71 *
72 * Dec. 18, 2003 : 0.8
73 * - Fix typo when reading back fan speed on 2 CPU machines
74 *
75 * Mar. 11, 2004 : 0.9
76 * - Rework code accessing the ADC chips, make it more robust and
77 * closer to the chip spec. Also make sure it is configured properly,
78 * I've seen yet unexplained cases where on startup, I would have stale
79 * values in the configuration register
80 * - Switch back to use of target fan speed for PID, thus lowering
81 * pressure on i2c
82 *
83 * Oct. 20, 2004 : 1.1
84 * - Add device-tree lookup for fan IDs, should detect liquid cooling
85 * pumps when present
86 * - Enable driver for PowerMac7,3 machines
87 * - Split the U3/Backside cooling on U3 & U3H versions as Darwin does
88 * - Add new CPU cooling algorithm for machines with liquid cooling
89 * - Workaround for some PowerMac7,3 with empty "fan" node in the devtree
90 * - Fix a signed/unsigned compare issue in some PID loops
91 *
92 * Mar. 10, 2005 : 1.2
93 * - Add basic support for Xserve G5
94 * - Retrieve pumps min/max from EEPROM image in device-tree (broken)
95 * - Use min/max macros here or there
96 * - Latest darwin updated U3H min fan speed to 20% PWM
97 *
98 * July. 06, 2006 : 1.3
99 * - Fix setting of RPM fans on Xserve G5 (they were going too fast)
100 * - Add missing slots fan control loop for Xserve G5
101 * - Lower fixed slots fan speed from 50% to 40% on desktop G5s. We
102 * still can't properly implement the control loop for these, so let's
103 * reduce the noise a little bit, it appears that 40% still gives us
104 * a pretty good air flow
105 * - Add code to "tickle" the FCU regulary so it doesn't think that
106 * we are gone while in fact, the machine just didn't need any fan
107 * speed change lately
108 *
109 */
110
111#include <linux/types.h>
112#include <linux/module.h>
113#include <linux/errno.h>
114#include <linux/kernel.h>
115#include <linux/delay.h>
116#include <linux/sched.h>
117#include <linux/init.h>
118#include <linux/spinlock.h>
119#include <linux/wait.h>
120#include <linux/reboot.h>
121#include <linux/kmod.h>
122#include <linux/i2c.h>
123#include <linux/kthread.h>
124#include <linux/mutex.h>
125#include <linux/of_device.h>
126#include <linux/of_platform.h>
127#include <asm/prom.h>
128#include <asm/machdep.h>
129#include <asm/io.h>
130#include <asm/sections.h>
131#include <asm/macio.h>
132
133#include "therm_pm72.h"
134
135#define VERSION "1.3"
136
137#undef DEBUG
138
139#ifdef DEBUG
140#define DBG(args...) printk(args)
141#else
142#define DBG(args...) do { } while(0)
143#endif
144
145
146/*
147 * Driver statics
148 */
149
150static struct platform_device * of_dev;
151static struct i2c_adapter * u3_0;
152static struct i2c_adapter * u3_1;
153static struct i2c_adapter * k2;
154static struct i2c_client * fcu;
155static struct cpu_pid_state processor_state[2];
156static struct basckside_pid_params backside_params;
157static struct backside_pid_state backside_state;
158static struct drives_pid_state drives_state;
159static struct dimm_pid_state dimms_state;
160static struct slots_pid_state slots_state;
161static int state;
162static int cpu_count;
163static int cpu_pid_type;
164static struct task_struct *ctrl_task;
165static struct completion ctrl_complete;
166static int critical_state;
167static int rackmac;
168static s32 dimm_output_clamp;
169static int fcu_rpm_shift;
170static int fcu_tickle_ticks;
171static DEFINE_MUTEX(driver_lock);
172
173/*
174 * We have 3 types of CPU PID control. One is "split" old style control
175 * for intake & exhaust fans, the other is "combined" control for both
176 * CPUs that also deals with the pumps when present. To be "compatible"
177 * with OS X at this point, we only use "COMBINED" on the machines that
178 * are identified as having the pumps (though that identification is at
179 * least dodgy). Ultimately, we could probably switch completely to this
180 * algorithm provided we hack it to deal with the UP case
181 */
182#define CPU_PID_TYPE_SPLIT 0
183#define CPU_PID_TYPE_COMBINED 1
184#define CPU_PID_TYPE_RACKMAC 2
185
186/*
187 * This table describes all fans in the FCU. The "id" and "type" values
188 * are defaults valid for all earlier machines. Newer machines will
189 * eventually override the table content based on the device-tree
190 */
191struct fcu_fan_table
192{
193 char* loc; /* location code */
194 int type; /* 0 = rpm, 1 = pwm, 2 = pump */
195 int id; /* id or -1 */
196};
197
198#define FCU_FAN_RPM 0
199#define FCU_FAN_PWM 1
200
201#define FCU_FAN_ABSENT_ID -1
202
203#define FCU_FAN_COUNT ARRAY_SIZE(fcu_fans)
204
205struct fcu_fan_table fcu_fans[] = {
206 [BACKSIDE_FAN_PWM_INDEX] = {
207 .loc = "BACKSIDE,SYS CTRLR FAN",
208 .type = FCU_FAN_PWM,
209 .id = BACKSIDE_FAN_PWM_DEFAULT_ID,
210 },
211 [DRIVES_FAN_RPM_INDEX] = {
212 .loc = "DRIVE BAY",
213 .type = FCU_FAN_RPM,
214 .id = DRIVES_FAN_RPM_DEFAULT_ID,
215 },
216 [SLOTS_FAN_PWM_INDEX] = {
217 .loc = "SLOT,PCI FAN",
218 .type = FCU_FAN_PWM,
219 .id = SLOTS_FAN_PWM_DEFAULT_ID,
220 },
221 [CPUA_INTAKE_FAN_RPM_INDEX] = {
222 .loc = "CPU A INTAKE",
223 .type = FCU_FAN_RPM,
224 .id = CPUA_INTAKE_FAN_RPM_DEFAULT_ID,
225 },
226 [CPUA_EXHAUST_FAN_RPM_INDEX] = {
227 .loc = "CPU A EXHAUST",
228 .type = FCU_FAN_RPM,
229 .id = CPUA_EXHAUST_FAN_RPM_DEFAULT_ID,
230 },
231 [CPUB_INTAKE_FAN_RPM_INDEX] = {
232 .loc = "CPU B INTAKE",
233 .type = FCU_FAN_RPM,
234 .id = CPUB_INTAKE_FAN_RPM_DEFAULT_ID,
235 },
236 [CPUB_EXHAUST_FAN_RPM_INDEX] = {
237 .loc = "CPU B EXHAUST",
238 .type = FCU_FAN_RPM,
239 .id = CPUB_EXHAUST_FAN_RPM_DEFAULT_ID,
240 },
241 /* pumps aren't present by default, have to be looked up in the
242 * device-tree
243 */
244 [CPUA_PUMP_RPM_INDEX] = {
245 .loc = "CPU A PUMP",
246 .type = FCU_FAN_RPM,
247 .id = FCU_FAN_ABSENT_ID,
248 },
249 [CPUB_PUMP_RPM_INDEX] = {
250 .loc = "CPU B PUMP",
251 .type = FCU_FAN_RPM,
252 .id = FCU_FAN_ABSENT_ID,
253 },
254 /* Xserve fans */
255 [CPU_A1_FAN_RPM_INDEX] = {
256 .loc = "CPU A 1",
257 .type = FCU_FAN_RPM,
258 .id = FCU_FAN_ABSENT_ID,
259 },
260 [CPU_A2_FAN_RPM_INDEX] = {
261 .loc = "CPU A 2",
262 .type = FCU_FAN_RPM,
263 .id = FCU_FAN_ABSENT_ID,
264 },
265 [CPU_A3_FAN_RPM_INDEX] = {
266 .loc = "CPU A 3",
267 .type = FCU_FAN_RPM,
268 .id = FCU_FAN_ABSENT_ID,
269 },
270 [CPU_B1_FAN_RPM_INDEX] = {
271 .loc = "CPU B 1",
272 .type = FCU_FAN_RPM,
273 .id = FCU_FAN_ABSENT_ID,
274 },
275 [CPU_B2_FAN_RPM_INDEX] = {
276 .loc = "CPU B 2",
277 .type = FCU_FAN_RPM,
278 .id = FCU_FAN_ABSENT_ID,
279 },
280 [CPU_B3_FAN_RPM_INDEX] = {
281 .loc = "CPU B 3",
282 .type = FCU_FAN_RPM,
283 .id = FCU_FAN_ABSENT_ID,
284 },
285};
286
287static struct i2c_driver therm_pm72_driver;
288
289/*
290 * Utility function to create an i2c_client structure and
291 * attach it to one of u3 adapters
292 */
293static struct i2c_client *attach_i2c_chip(int id, const char *name)
294{
295 struct i2c_client *clt;
296 struct i2c_adapter *adap;
297 struct i2c_board_info info;
298
299 if (id & 0x200)
300 adap = k2;
301 else if (id & 0x100)
302 adap = u3_1;
303 else
304 adap = u3_0;
305 if (adap == NULL)
306 return NULL;
307
308 memset(&info, 0, sizeof(struct i2c_board_info));
309 info.addr = (id >> 1) & 0x7f;
310 strlcpy(info.type, "therm_pm72", I2C_NAME_SIZE);
311 clt = i2c_new_device(adap, &info);
312 if (!clt) {
313 printk(KERN_ERR "therm_pm72: Failed to attach to i2c ID 0x%x\n", id);
314 return NULL;
315 }
316
317 /*
318 * Let i2c-core delete that device on driver removal.
319 * This is safe because i2c-core holds the core_lock mutex for us.
320 */
321 list_add_tail(&clt->detected, &therm_pm72_driver.clients);
322 return clt;
323}
324
325/*
326 * Here are the i2c chip access wrappers
327 */
328
329static void initialize_adc(struct cpu_pid_state *state)
330{
331 int rc;
332 u8 buf[2];
333
334 /* Read ADC the configuration register and cache it. We
335 * also make sure Config2 contains proper values, I've seen
336 * cases where we got stale grabage in there, thus preventing
337 * proper reading of conv. values
338 */
339
340 /* Clear Config2 */
341 buf[0] = 5;
342 buf[1] = 0;
343 i2c_master_send(state->monitor, buf, 2);
344
345 /* Read & cache Config1 */
346 buf[0] = 1;
347 rc = i2c_master_send(state->monitor, buf, 1);
348 if (rc > 0) {
349 rc = i2c_master_recv(state->monitor, buf, 1);
350 if (rc > 0) {
351 state->adc_config = buf[0];
352 DBG("ADC config reg: %02x\n", state->adc_config);
353 /* Disable shutdown mode */
354 state->adc_config &= 0xfe;
355 buf[0] = 1;
356 buf[1] = state->adc_config;
357 rc = i2c_master_send(state->monitor, buf, 2);
358 }
359 }
360 if (rc <= 0)
361 printk(KERN_ERR "therm_pm72: Error reading ADC config"
362 " register !\n");
363}
364
365static int read_smon_adc(struct cpu_pid_state *state, int chan)
366{
367 int rc, data, tries = 0;
368 u8 buf[2];
369
370 for (;;) {
371 /* Set channel */
372 buf[0] = 1;
373 buf[1] = (state->adc_config & 0x1f) | (chan << 5);
374 rc = i2c_master_send(state->monitor, buf, 2);
375 if (rc <= 0)
376 goto error;
377 /* Wait for conversion */
378 msleep(1);
379 /* Switch to data register */
380 buf[0] = 4;
381 rc = i2c_master_send(state->monitor, buf, 1);
382 if (rc <= 0)
383 goto error;
384 /* Read result */
385 rc = i2c_master_recv(state->monitor, buf, 2);
386 if (rc < 0)
387 goto error;
388 data = ((u16)buf[0]) << 8 | (u16)buf[1];
389 return data >> 6;
390 error:
391 DBG("Error reading ADC, retrying...\n");
392 if (++tries > 10) {
393 printk(KERN_ERR "therm_pm72: Error reading ADC !\n");
394 return -1;
395 }
396 msleep(10);
397 }
398}
399
400static int read_lm87_reg(struct i2c_client * chip, int reg)
401{
402 int rc, tries = 0;
403 u8 buf;
404
405 for (;;) {
406 /* Set address */
407 buf = (u8)reg;
408 rc = i2c_master_send(chip, &buf, 1);
409 if (rc <= 0)
410 goto error;
411 rc = i2c_master_recv(chip, &buf, 1);
412 if (rc <= 0)
413 goto error;
414 return (int)buf;
415 error:
416 DBG("Error reading LM87, retrying...\n");
417 if (++tries > 10) {
418 printk(KERN_ERR "therm_pm72: Error reading LM87 !\n");
419 return -1;
420 }
421 msleep(10);
422 }
423}
424
425static int fan_read_reg(int reg, unsigned char *buf, int nb)
426{
427 int tries, nr, nw;
428
429 buf[0] = reg;
430 tries = 0;
431 for (;;) {
432 nw = i2c_master_send(fcu, buf, 1);
433 if (nw > 0 || (nw < 0 && nw != -EIO) || tries >= 100)
434 break;
435 msleep(10);
436 ++tries;
437 }
438 if (nw <= 0) {
439 printk(KERN_ERR "Failure writing address to FCU: %d", nw);
440 return -EIO;
441 }
442 tries = 0;
443 for (;;) {
444 nr = i2c_master_recv(fcu, buf, nb);
445 if (nr > 0 || (nr < 0 && nr != -ENODEV) || tries >= 100)
446 break;
447 msleep(10);
448 ++tries;
449 }
450 if (nr <= 0)
451 printk(KERN_ERR "Failure reading data from FCU: %d", nw);
452 return nr;
453}
454
455static int fan_write_reg(int reg, const unsigned char *ptr, int nb)
456{
457 int tries, nw;
458 unsigned char buf[16];
459
460 buf[0] = reg;
461 memcpy(buf+1, ptr, nb);
462 ++nb;
463 tries = 0;
464 for (;;) {
465 nw = i2c_master_send(fcu, buf, nb);
466 if (nw > 0 || (nw < 0 && nw != -EIO) || tries >= 100)
467 break;
468 msleep(10);
469 ++tries;
470 }
471 if (nw < 0)
472 printk(KERN_ERR "Failure writing to FCU: %d", nw);
473 return nw;
474}
475
476static int start_fcu(void)
477{
478 unsigned char buf = 0xff;
479 int rc;
480
481 rc = fan_write_reg(0xe, &buf, 1);
482 if (rc < 0)
483 return -EIO;
484 rc = fan_write_reg(0x2e, &buf, 1);
485 if (rc < 0)
486 return -EIO;
487 rc = fan_read_reg(0, &buf, 1);
488 if (rc < 0)
489 return -EIO;
490 fcu_rpm_shift = (buf == 1) ? 2 : 3;
491 printk(KERN_DEBUG "FCU Initialized, RPM fan shift is %d\n",
492 fcu_rpm_shift);
493
494 return 0;
495}
496
497static int set_rpm_fan(int fan_index, int rpm)
498{
499 unsigned char buf[2];
500 int rc, id, min, max;
501
502 if (fcu_fans[fan_index].type != FCU_FAN_RPM)
503 return -EINVAL;
504 id = fcu_fans[fan_index].id;
505 if (id == FCU_FAN_ABSENT_ID)
506 return -EINVAL;
507
508 min = 2400 >> fcu_rpm_shift;
509 max = 56000 >> fcu_rpm_shift;
510
511 if (rpm < min)
512 rpm = min;
513 else if (rpm > max)
514 rpm = max;
515 buf[0] = rpm >> (8 - fcu_rpm_shift);
516 buf[1] = rpm << fcu_rpm_shift;
517 rc = fan_write_reg(0x10 + (id * 2), buf, 2);
518 if (rc < 0)
519 return -EIO;
520 return 0;
521}
522
523static int get_rpm_fan(int fan_index, int programmed)
524{
525 unsigned char failure;
526 unsigned char active;
527 unsigned char buf[2];
528 int rc, id, reg_base;
529
530 if (fcu_fans[fan_index].type != FCU_FAN_RPM)
531 return -EINVAL;
532 id = fcu_fans[fan_index].id;
533 if (id == FCU_FAN_ABSENT_ID)
534 return -EINVAL;
535
536 rc = fan_read_reg(0xb, &failure, 1);
537 if (rc != 1)
538 return -EIO;
539 if ((failure & (1 << id)) != 0)
540 return -EFAULT;
541 rc = fan_read_reg(0xd, &active, 1);
542 if (rc != 1)
543 return -EIO;
544 if ((active & (1 << id)) == 0)
545 return -ENXIO;
546
547 /* Programmed value or real current speed */
548 reg_base = programmed ? 0x10 : 0x11;
549 rc = fan_read_reg(reg_base + (id * 2), buf, 2);
550 if (rc != 2)
551 return -EIO;
552
553 return (buf[0] << (8 - fcu_rpm_shift)) | buf[1] >> fcu_rpm_shift;
554}
555
556static int set_pwm_fan(int fan_index, int pwm)
557{
558 unsigned char buf[2];
559 int rc, id;
560
561 if (fcu_fans[fan_index].type != FCU_FAN_PWM)
562 return -EINVAL;
563 id = fcu_fans[fan_index].id;
564 if (id == FCU_FAN_ABSENT_ID)
565 return -EINVAL;
566
567 if (pwm < 10)
568 pwm = 10;
569 else if (pwm > 100)
570 pwm = 100;
571 pwm = (pwm * 2559) / 1000;
572 buf[0] = pwm;
573 rc = fan_write_reg(0x30 + (id * 2), buf, 1);
574 if (rc < 0)
575 return rc;
576 return 0;
577}
578
579static int get_pwm_fan(int fan_index)
580{
581 unsigned char failure;
582 unsigned char active;
583 unsigned char buf[2];
584 int rc, id;
585
586 if (fcu_fans[fan_index].type != FCU_FAN_PWM)
587 return -EINVAL;
588 id = fcu_fans[fan_index].id;
589 if (id == FCU_FAN_ABSENT_ID)
590 return -EINVAL;
591
592 rc = fan_read_reg(0x2b, &failure, 1);
593 if (rc != 1)
594 return -EIO;
595 if ((failure & (1 << id)) != 0)
596 return -EFAULT;
597 rc = fan_read_reg(0x2d, &active, 1);
598 if (rc != 1)
599 return -EIO;
600 if ((active & (1 << id)) == 0)
601 return -ENXIO;
602
603 /* Programmed value or real current speed */
604 rc = fan_read_reg(0x30 + (id * 2), buf, 1);
605 if (rc != 1)
606 return -EIO;
607
608 return (buf[0] * 1000) / 2559;
609}
610
611static void tickle_fcu(void)
612{
613 int pwm;
614
615 pwm = get_pwm_fan(SLOTS_FAN_PWM_INDEX);
616
617 DBG("FCU Tickle, slots fan is: %d\n", pwm);
618 if (pwm < 0)
619 pwm = 100;
620
621 if (!rackmac) {
622 pwm = SLOTS_FAN_DEFAULT_PWM;
623 } else if (pwm < SLOTS_PID_OUTPUT_MIN)
624 pwm = SLOTS_PID_OUTPUT_MIN;
625
626 /* That is hopefully enough to make the FCU happy */
627 set_pwm_fan(SLOTS_FAN_PWM_INDEX, pwm);
628}
629
630
631/*
632 * Utility routine to read the CPU calibration EEPROM data
633 * from the device-tree
634 */
635static int read_eeprom(int cpu, struct mpu_data *out)
636{
637 struct device_node *np;
638 char nodename[64];
639 const u8 *data;
640 int len;
641
642 /* prom.c routine for finding a node by path is a bit brain dead
643 * and requires exact @xxx unit numbers. This is a bit ugly but
644 * will work for these machines
645 */
646 sprintf(nodename, "/u3@0,f8000000/i2c@f8001000/cpuid@a%d", cpu ? 2 : 0);
647 np = of_find_node_by_path(nodename);
648 if (np == NULL) {
649 printk(KERN_ERR "therm_pm72: Failed to retrieve cpuid node from device-tree\n");
650 return -ENODEV;
651 }
652 data = of_get_property(np, "cpuid", &len);
653 if (data == NULL) {
654 printk(KERN_ERR "therm_pm72: Failed to retrieve cpuid property from device-tree\n");
655 of_node_put(np);
656 return -ENODEV;
657 }
658 memcpy(out, data, sizeof(struct mpu_data));
659 of_node_put(np);
660
661 return 0;
662}
663
664static void fetch_cpu_pumps_minmax(void)
665{
666 struct cpu_pid_state *state0 = &processor_state[0];
667 struct cpu_pid_state *state1 = &processor_state[1];
668 u16 pump_min = 0, pump_max = 0xffff;
669 u16 tmp[4];
670
671 /* Try to fetch pumps min/max infos from eeprom */
672
673 memcpy(&tmp, &state0->mpu.processor_part_num, 8);
674 if (tmp[0] != 0xffff && tmp[1] != 0xffff) {
675 pump_min = max(pump_min, tmp[0]);
676 pump_max = min(pump_max, tmp[1]);
677 }
678 if (tmp[2] != 0xffff && tmp[3] != 0xffff) {
679 pump_min = max(pump_min, tmp[2]);
680 pump_max = min(pump_max, tmp[3]);
681 }
682
683 /* Double check the values, this _IS_ needed as the EEPROM on
684 * some dual 2.5Ghz G5s seem, at least, to have both min & max
685 * same to the same value ... (grrrr)
686 */
687 if (pump_min == pump_max || pump_min == 0 || pump_max == 0xffff) {
688 pump_min = CPU_PUMP_OUTPUT_MIN;
689 pump_max = CPU_PUMP_OUTPUT_MAX;
690 }
691
692 state0->pump_min = state1->pump_min = pump_min;
693 state0->pump_max = state1->pump_max = pump_max;
694}
695
696/*
697 * Now, unfortunately, sysfs doesn't give us a nice void * we could
698 * pass around to the attribute functions, so we don't really have
699 * choice but implement a bunch of them...
700 *
701 * That sucks a bit, we take the lock because FIX32TOPRINT evaluates
702 * the input twice... I accept patches :)
703 */
704#define BUILD_SHOW_FUNC_FIX(name, data) \
705static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
706{ \
707 ssize_t r; \
708 mutex_lock(&driver_lock); \
709 r = sprintf(buf, "%d.%03d", FIX32TOPRINT(data)); \
710 mutex_unlock(&driver_lock); \
711 return r; \
712}
713#define BUILD_SHOW_FUNC_INT(name, data) \
714static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
715{ \
716 return sprintf(buf, "%d", data); \
717}
718
719BUILD_SHOW_FUNC_FIX(cpu0_temperature, processor_state[0].last_temp)
720BUILD_SHOW_FUNC_FIX(cpu0_voltage, processor_state[0].voltage)
721BUILD_SHOW_FUNC_FIX(cpu0_current, processor_state[0].current_a)
722BUILD_SHOW_FUNC_INT(cpu0_exhaust_fan_rpm, processor_state[0].rpm)
723BUILD_SHOW_FUNC_INT(cpu0_intake_fan_rpm, processor_state[0].intake_rpm)
724
725BUILD_SHOW_FUNC_FIX(cpu1_temperature, processor_state[1].last_temp)
726BUILD_SHOW_FUNC_FIX(cpu1_voltage, processor_state[1].voltage)
727BUILD_SHOW_FUNC_FIX(cpu1_current, processor_state[1].current_a)
728BUILD_SHOW_FUNC_INT(cpu1_exhaust_fan_rpm, processor_state[1].rpm)
729BUILD_SHOW_FUNC_INT(cpu1_intake_fan_rpm, processor_state[1].intake_rpm)
730
731BUILD_SHOW_FUNC_FIX(backside_temperature, backside_state.last_temp)
732BUILD_SHOW_FUNC_INT(backside_fan_pwm, backside_state.pwm)
733
734BUILD_SHOW_FUNC_FIX(drives_temperature, drives_state.last_temp)
735BUILD_SHOW_FUNC_INT(drives_fan_rpm, drives_state.rpm)
736
737BUILD_SHOW_FUNC_FIX(slots_temperature, slots_state.last_temp)
738BUILD_SHOW_FUNC_INT(slots_fan_pwm, slots_state.pwm)
739
740BUILD_SHOW_FUNC_FIX(dimms_temperature, dimms_state.last_temp)
741
742static DEVICE_ATTR(cpu0_temperature,S_IRUGO,show_cpu0_temperature,NULL);
743static DEVICE_ATTR(cpu0_voltage,S_IRUGO,show_cpu0_voltage,NULL);
744static DEVICE_ATTR(cpu0_current,S_IRUGO,show_cpu0_current,NULL);
745static DEVICE_ATTR(cpu0_exhaust_fan_rpm,S_IRUGO,show_cpu0_exhaust_fan_rpm,NULL);
746static DEVICE_ATTR(cpu0_intake_fan_rpm,S_IRUGO,show_cpu0_intake_fan_rpm,NULL);
747
748static DEVICE_ATTR(cpu1_temperature,S_IRUGO,show_cpu1_temperature,NULL);
749static DEVICE_ATTR(cpu1_voltage,S_IRUGO,show_cpu1_voltage,NULL);
750static DEVICE_ATTR(cpu1_current,S_IRUGO,show_cpu1_current,NULL);
751static DEVICE_ATTR(cpu1_exhaust_fan_rpm,S_IRUGO,show_cpu1_exhaust_fan_rpm,NULL);
752static DEVICE_ATTR(cpu1_intake_fan_rpm,S_IRUGO,show_cpu1_intake_fan_rpm,NULL);
753
754static DEVICE_ATTR(backside_temperature,S_IRUGO,show_backside_temperature,NULL);
755static DEVICE_ATTR(backside_fan_pwm,S_IRUGO,show_backside_fan_pwm,NULL);
756
757static DEVICE_ATTR(drives_temperature,S_IRUGO,show_drives_temperature,NULL);
758static DEVICE_ATTR(drives_fan_rpm,S_IRUGO,show_drives_fan_rpm,NULL);
759
760static DEVICE_ATTR(slots_temperature,S_IRUGO,show_slots_temperature,NULL);
761static DEVICE_ATTR(slots_fan_pwm,S_IRUGO,show_slots_fan_pwm,NULL);
762
763static DEVICE_ATTR(dimms_temperature,S_IRUGO,show_dimms_temperature,NULL);
764
765/*
766 * CPUs fans control loop
767 */
768
769static int do_read_one_cpu_values(struct cpu_pid_state *state, s32 *temp, s32 *power)
770{
771 s32 ltemp, volts, amps;
772 int index, rc = 0;
773
774 /* Default (in case of error) */
775 *temp = state->cur_temp;
776 *power = state->cur_power;
777
778 if (cpu_pid_type == CPU_PID_TYPE_RACKMAC)
779 index = (state->index == 0) ?
780 CPU_A1_FAN_RPM_INDEX : CPU_B1_FAN_RPM_INDEX;
781 else
782 index = (state->index == 0) ?
783 CPUA_EXHAUST_FAN_RPM_INDEX : CPUB_EXHAUST_FAN_RPM_INDEX;
784
785 /* Read current fan status */
786 rc = get_rpm_fan(index, !RPM_PID_USE_ACTUAL_SPEED);
787 if (rc < 0) {
788 /* XXX What do we do now ? Nothing for now, keep old value, but
789 * return error upstream
790 */
791 DBG(" cpu %d, fan reading error !\n", state->index);
792 } else {
793 state->rpm = rc;
794 DBG(" cpu %d, exhaust RPM: %d\n", state->index, state->rpm);
795 }
796
797 /* Get some sensor readings and scale it */
798 ltemp = read_smon_adc(state, 1);
799 if (ltemp == -1) {
800 /* XXX What do we do now ? */
801 state->overtemp++;
802 if (rc == 0)
803 rc = -EIO;
804 DBG(" cpu %d, temp reading error !\n", state->index);
805 } else {
806 /* Fixup temperature according to diode calibration
807 */
808 DBG(" cpu %d, temp raw: %04x, m_diode: %04x, b_diode: %04x\n",
809 state->index,
810 ltemp, state->mpu.mdiode, state->mpu.bdiode);
811 *temp = ((s32)ltemp * (s32)state->mpu.mdiode + ((s32)state->mpu.bdiode << 12)) >> 2;
812 state->last_temp = *temp;
813 DBG(" temp: %d.%03d\n", FIX32TOPRINT((*temp)));
814 }
815
816 /*
817 * Read voltage & current and calculate power
818 */
819 volts = read_smon_adc(state, 3);
820 amps = read_smon_adc(state, 4);
821
822 /* Scale voltage and current raw sensor values according to fixed scales
823 * obtained in Darwin and calculate power from I and V
824 */
825 volts *= ADC_CPU_VOLTAGE_SCALE;
826 amps *= ADC_CPU_CURRENT_SCALE;
827 *power = (((u64)volts) * ((u64)amps)) >> 16;
828 state->voltage = volts;
829 state->current_a = amps;
830 state->last_power = *power;
831
832 DBG(" cpu %d, current: %d.%03d, voltage: %d.%03d, power: %d.%03d W\n",
833 state->index, FIX32TOPRINT(state->current_a),
834 FIX32TOPRINT(state->voltage), FIX32TOPRINT(*power));
835
836 return 0;
837}
838
839static void do_cpu_pid(struct cpu_pid_state *state, s32 temp, s32 power)
840{
841 s32 power_target, integral, derivative, proportional, adj_in_target, sval;
842 s64 integ_p, deriv_p, prop_p, sum;
843 int i;
844
845 /* Calculate power target value (could be done once for all)
846 * and convert to a 16.16 fp number
847 */
848 power_target = ((u32)(state->mpu.pmaxh - state->mpu.padjmax)) << 16;
849 DBG(" power target: %d.%03d, error: %d.%03d\n",
850 FIX32TOPRINT(power_target), FIX32TOPRINT(power_target - power));
851
852 /* Store temperature and power in history array */
853 state->cur_temp = (state->cur_temp + 1) % CPU_TEMP_HISTORY_SIZE;
854 state->temp_history[state->cur_temp] = temp;
855 state->cur_power = (state->cur_power + 1) % state->count_power;
856 state->power_history[state->cur_power] = power;
857 state->error_history[state->cur_power] = power_target - power;
858
859 /* If first loop, fill the history table */
860 if (state->first) {
861 for (i = 0; i < (state->count_power - 1); i++) {
862 state->cur_power = (state->cur_power + 1) % state->count_power;
863 state->power_history[state->cur_power] = power;
864 state->error_history[state->cur_power] = power_target - power;
865 }
866 for (i = 0; i < (CPU_TEMP_HISTORY_SIZE - 1); i++) {
867 state->cur_temp = (state->cur_temp + 1) % CPU_TEMP_HISTORY_SIZE;
868 state->temp_history[state->cur_temp] = temp;
869 }
870 state->first = 0;
871 }
872
873 /* Calculate the integral term normally based on the "power" values */
874 sum = 0;
875 integral = 0;
876 for (i = 0; i < state->count_power; i++)
877 integral += state->error_history[i];
878 integral *= CPU_PID_INTERVAL;
879 DBG(" integral: %08x\n", integral);
880
881 /* Calculate the adjusted input (sense value).
882 * G_r is 12.20
883 * integ is 16.16
884 * so the result is 28.36
885 *
886 * input target is mpu.ttarget, input max is mpu.tmax
887 */
888 integ_p = ((s64)state->mpu.pid_gr) * (s64)integral;
889 DBG(" integ_p: %d\n", (int)(integ_p >> 36));
890 sval = (state->mpu.tmax << 16) - ((integ_p >> 20) & 0xffffffff);
891 adj_in_target = (state->mpu.ttarget << 16);
892 if (adj_in_target > sval)
893 adj_in_target = sval;
894 DBG(" adj_in_target: %d.%03d, ttarget: %d\n", FIX32TOPRINT(adj_in_target),
895 state->mpu.ttarget);
896
897 /* Calculate the derivative term */
898 derivative = state->temp_history[state->cur_temp] -
899 state->temp_history[(state->cur_temp + CPU_TEMP_HISTORY_SIZE - 1)
900 % CPU_TEMP_HISTORY_SIZE];
901 derivative /= CPU_PID_INTERVAL;
902 deriv_p = ((s64)state->mpu.pid_gd) * (s64)derivative;
903 DBG(" deriv_p: %d\n", (int)(deriv_p >> 36));
904 sum += deriv_p;
905
906 /* Calculate the proportional term */
907 proportional = temp - adj_in_target;
908 prop_p = ((s64)state->mpu.pid_gp) * (s64)proportional;
909 DBG(" prop_p: %d\n", (int)(prop_p >> 36));
910 sum += prop_p;
911
912 /* Scale sum */
913 sum >>= 36;
914
915 DBG(" sum: %d\n", (int)sum);
916 state->rpm += (s32)sum;
917}
918
919static void do_monitor_cpu_combined(void)
920{
921 struct cpu_pid_state *state0 = &processor_state[0];
922 struct cpu_pid_state *state1 = &processor_state[1];
923 s32 temp0, power0, temp1, power1;
924 s32 temp_combi, power_combi;
925 int rc, intake, pump;
926
927 rc = do_read_one_cpu_values(state0, &temp0, &power0);
928 if (rc < 0) {
929 /* XXX What do we do now ? */
930 }
931 state1->overtemp = 0;
932 rc = do_read_one_cpu_values(state1, &temp1, &power1);
933 if (rc < 0) {
934 /* XXX What do we do now ? */
935 }
936 if (state1->overtemp)
937 state0->overtemp++;
938
939 temp_combi = max(temp0, temp1);
940 power_combi = max(power0, power1);
941
942 /* Check tmax, increment overtemp if we are there. At tmax+8, we go
943 * full blown immediately and try to trigger a shutdown
944 */
945 if (temp_combi >= ((state0->mpu.tmax + 8) << 16)) {
946 printk(KERN_WARNING "Warning ! Temperature way above maximum (%d) !\n",
947 temp_combi >> 16);
948 state0->overtemp += CPU_MAX_OVERTEMP / 4;
949 } else if (temp_combi > (state0->mpu.tmax << 16)) {
950 state0->overtemp++;
951 printk(KERN_WARNING "Temperature %d above max %d. overtemp %d\n",
952 temp_combi >> 16, state0->mpu.tmax, state0->overtemp);
953 } else {
954 if (state0->overtemp)
955 printk(KERN_WARNING "Temperature back down to %d\n",
956 temp_combi >> 16);
957 state0->overtemp = 0;
958 }
959 if (state0->overtemp >= CPU_MAX_OVERTEMP)
960 critical_state = 1;
961 if (state0->overtemp > 0) {
962 state0->rpm = state0->mpu.rmaxn_exhaust_fan;
963 state0->intake_rpm = intake = state0->mpu.rmaxn_intake_fan;
964 pump = state0->pump_max;
965 goto do_set_fans;
966 }
967
968 /* Do the PID */
969 do_cpu_pid(state0, temp_combi, power_combi);
970
971 /* Range check */
972 state0->rpm = max(state0->rpm, (int)state0->mpu.rminn_exhaust_fan);
973 state0->rpm = min(state0->rpm, (int)state0->mpu.rmaxn_exhaust_fan);
974
975 /* Calculate intake fan speed */
976 intake = (state0->rpm * CPU_INTAKE_SCALE) >> 16;
977 intake = max(intake, (int)state0->mpu.rminn_intake_fan);
978 intake = min(intake, (int)state0->mpu.rmaxn_intake_fan);
979 state0->intake_rpm = intake;
980
981 /* Calculate pump speed */
982 pump = (state0->rpm * state0->pump_max) /
983 state0->mpu.rmaxn_exhaust_fan;
984 pump = min(pump, state0->pump_max);
985 pump = max(pump, state0->pump_min);
986
987 do_set_fans:
988 /* We copy values from state 0 to state 1 for /sysfs */
989 state1->rpm = state0->rpm;
990 state1->intake_rpm = state0->intake_rpm;
991
992 DBG("** CPU %d RPM: %d Ex, %d, Pump: %d, In, overtemp: %d\n",
993 state1->index, (int)state1->rpm, intake, pump, state1->overtemp);
994
995 /* We should check for errors, shouldn't we ? But then, what
996 * do we do once the error occurs ? For FCU notified fan
997 * failures (-EFAULT) we probably want to notify userland
998 * some way...
999 */
1000 set_rpm_fan(CPUA_INTAKE_FAN_RPM_INDEX, intake);
1001 set_rpm_fan(CPUA_EXHAUST_FAN_RPM_INDEX, state0->rpm);
1002 set_rpm_fan(CPUB_INTAKE_FAN_RPM_INDEX, intake);
1003 set_rpm_fan(CPUB_EXHAUST_FAN_RPM_INDEX, state0->rpm);
1004
1005 if (fcu_fans[CPUA_PUMP_RPM_INDEX].id != FCU_FAN_ABSENT_ID)
1006 set_rpm_fan(CPUA_PUMP_RPM_INDEX, pump);
1007 if (fcu_fans[CPUB_PUMP_RPM_INDEX].id != FCU_FAN_ABSENT_ID)
1008 set_rpm_fan(CPUB_PUMP_RPM_INDEX, pump);
1009}
1010
1011static void do_monitor_cpu_split(struct cpu_pid_state *state)
1012{
1013 s32 temp, power;
1014 int rc, intake;
1015
1016 /* Read current fan status */
1017 rc = do_read_one_cpu_values(state, &temp, &power);
1018 if (rc < 0) {
1019 /* XXX What do we do now ? */
1020 }
1021
1022 /* Check tmax, increment overtemp if we are there. At tmax+8, we go
1023 * full blown immediately and try to trigger a shutdown
1024 */
1025 if (temp >= ((state->mpu.tmax + 8) << 16)) {
1026 printk(KERN_WARNING "Warning ! CPU %d temperature way above maximum"
1027 " (%d) !\n",
1028 state->index, temp >> 16);
1029 state->overtemp += CPU_MAX_OVERTEMP / 4;
1030 } else if (temp > (state->mpu.tmax << 16)) {
1031 state->overtemp++;
1032 printk(KERN_WARNING "CPU %d temperature %d above max %d. overtemp %d\n",
1033 state->index, temp >> 16, state->mpu.tmax, state->overtemp);
1034 } else {
1035 if (state->overtemp)
1036 printk(KERN_WARNING "CPU %d temperature back down to %d\n",
1037 state->index, temp >> 16);
1038 state->overtemp = 0;
1039 }
1040 if (state->overtemp >= CPU_MAX_OVERTEMP)
1041 critical_state = 1;
1042 if (state->overtemp > 0) {
1043 state->rpm = state->mpu.rmaxn_exhaust_fan;
1044 state->intake_rpm = intake = state->mpu.rmaxn_intake_fan;
1045 goto do_set_fans;
1046 }
1047
1048 /* Do the PID */
1049 do_cpu_pid(state, temp, power);
1050
1051 /* Range check */
1052 state->rpm = max(state->rpm, (int)state->mpu.rminn_exhaust_fan);
1053 state->rpm = min(state->rpm, (int)state->mpu.rmaxn_exhaust_fan);
1054
1055 /* Calculate intake fan */
1056 intake = (state->rpm * CPU_INTAKE_SCALE) >> 16;
1057 intake = max(intake, (int)state->mpu.rminn_intake_fan);
1058 intake = min(intake, (int)state->mpu.rmaxn_intake_fan);
1059 state->intake_rpm = intake;
1060
1061 do_set_fans:
1062 DBG("** CPU %d RPM: %d Ex, %d In, overtemp: %d\n",
1063 state->index, (int)state->rpm, intake, state->overtemp);
1064
1065 /* We should check for errors, shouldn't we ? But then, what
1066 * do we do once the error occurs ? For FCU notified fan
1067 * failures (-EFAULT) we probably want to notify userland
1068 * some way...
1069 */
1070 if (state->index == 0) {
1071 set_rpm_fan(CPUA_INTAKE_FAN_RPM_INDEX, intake);
1072 set_rpm_fan(CPUA_EXHAUST_FAN_RPM_INDEX, state->rpm);
1073 } else {
1074 set_rpm_fan(CPUB_INTAKE_FAN_RPM_INDEX, intake);
1075 set_rpm_fan(CPUB_EXHAUST_FAN_RPM_INDEX, state->rpm);
1076 }
1077}
1078
1079static void do_monitor_cpu_rack(struct cpu_pid_state *state)
1080{
1081 s32 temp, power, fan_min;
1082 int rc;
1083
1084 /* Read current fan status */
1085 rc = do_read_one_cpu_values(state, &temp, &power);
1086 if (rc < 0) {
1087 /* XXX What do we do now ? */
1088 }
1089
1090 /* Check tmax, increment overtemp if we are there. At tmax+8, we go
1091 * full blown immediately and try to trigger a shutdown
1092 */
1093 if (temp >= ((state->mpu.tmax + 8) << 16)) {
1094 printk(KERN_WARNING "Warning ! CPU %d temperature way above maximum"
1095 " (%d) !\n",
1096 state->index, temp >> 16);
1097 state->overtemp = CPU_MAX_OVERTEMP / 4;
1098 } else if (temp > (state->mpu.tmax << 16)) {
1099 state->overtemp++;
1100 printk(KERN_WARNING "CPU %d temperature %d above max %d. overtemp %d\n",
1101 state->index, temp >> 16, state->mpu.tmax, state->overtemp);
1102 } else {
1103 if (state->overtemp)
1104 printk(KERN_WARNING "CPU %d temperature back down to %d\n",
1105 state->index, temp >> 16);
1106 state->overtemp = 0;
1107 }
1108 if (state->overtemp >= CPU_MAX_OVERTEMP)
1109 critical_state = 1;
1110 if (state->overtemp > 0) {
1111 state->rpm = state->intake_rpm = state->mpu.rmaxn_intake_fan;
1112 goto do_set_fans;
1113 }
1114
1115 /* Do the PID */
1116 do_cpu_pid(state, temp, power);
1117
1118 /* Check clamp from dimms */
1119 fan_min = dimm_output_clamp;
1120 fan_min = max(fan_min, (int)state->mpu.rminn_intake_fan);
1121
1122 DBG(" CPU min mpu = %d, min dimm = %d\n",
1123 state->mpu.rminn_intake_fan, dimm_output_clamp);
1124
1125 state->rpm = max(state->rpm, (int)fan_min);
1126 state->rpm = min(state->rpm, (int)state->mpu.rmaxn_intake_fan);
1127 state->intake_rpm = state->rpm;
1128
1129 do_set_fans:
1130 DBG("** CPU %d RPM: %d overtemp: %d\n",
1131 state->index, (int)state->rpm, state->overtemp);
1132
1133 /* We should check for errors, shouldn't we ? But then, what
1134 * do we do once the error occurs ? For FCU notified fan
1135 * failures (-EFAULT) we probably want to notify userland
1136 * some way...
1137 */
1138 if (state->index == 0) {
1139 set_rpm_fan(CPU_A1_FAN_RPM_INDEX, state->rpm);
1140 set_rpm_fan(CPU_A2_FAN_RPM_INDEX, state->rpm);
1141 set_rpm_fan(CPU_A3_FAN_RPM_INDEX, state->rpm);
1142 } else {
1143 set_rpm_fan(CPU_B1_FAN_RPM_INDEX, state->rpm);
1144 set_rpm_fan(CPU_B2_FAN_RPM_INDEX, state->rpm);
1145 set_rpm_fan(CPU_B3_FAN_RPM_INDEX, state->rpm);
1146 }
1147}
1148
1149/*
1150 * Initialize the state structure for one CPU control loop
1151 */
1152static int init_processor_state(struct cpu_pid_state *state, int index)
1153{
1154 int err;
1155
1156 state->index = index;
1157 state->first = 1;
1158 state->rpm = (cpu_pid_type == CPU_PID_TYPE_RACKMAC) ? 4000 : 1000;
1159 state->overtemp = 0;
1160 state->adc_config = 0x00;
1161
1162
1163 if (index == 0)
1164 state->monitor = attach_i2c_chip(SUPPLY_MONITOR_ID, "CPU0_monitor");
1165 else if (index == 1)
1166 state->monitor = attach_i2c_chip(SUPPLY_MONITORB_ID, "CPU1_monitor");
1167 if (state->monitor == NULL)
1168 goto fail;
1169
1170 if (read_eeprom(index, &state->mpu))
1171 goto fail;
1172
1173 state->count_power = state->mpu.tguardband;
1174 if (state->count_power > CPU_POWER_HISTORY_SIZE) {
1175 printk(KERN_WARNING "Warning ! too many power history slots\n");
1176 state->count_power = CPU_POWER_HISTORY_SIZE;
1177 }
1178 DBG("CPU %d Using %d power history entries\n", index, state->count_power);
1179
1180 if (index == 0) {
1181 err = device_create_file(&of_dev->dev, &dev_attr_cpu0_temperature);
1182 err |= device_create_file(&of_dev->dev, &dev_attr_cpu0_voltage);
1183 err |= device_create_file(&of_dev->dev, &dev_attr_cpu0_current);
1184 err |= device_create_file(&of_dev->dev, &dev_attr_cpu0_exhaust_fan_rpm);
1185 err |= device_create_file(&of_dev->dev, &dev_attr_cpu0_intake_fan_rpm);
1186 } else {
1187 err = device_create_file(&of_dev->dev, &dev_attr_cpu1_temperature);
1188 err |= device_create_file(&of_dev->dev, &dev_attr_cpu1_voltage);
1189 err |= device_create_file(&of_dev->dev, &dev_attr_cpu1_current);
1190 err |= device_create_file(&of_dev->dev, &dev_attr_cpu1_exhaust_fan_rpm);
1191 err |= device_create_file(&of_dev->dev, &dev_attr_cpu1_intake_fan_rpm);
1192 }
1193 if (err)
1194 printk(KERN_WARNING "Failed to create some of the attribute"
1195 "files for CPU %d\n", index);
1196
1197 return 0;
1198 fail:
1199 state->monitor = NULL;
1200
1201 return -ENODEV;
1202}
1203
1204/*
1205 * Dispose of the state data for one CPU control loop
1206 */
1207static void dispose_processor_state(struct cpu_pid_state *state)
1208{
1209 if (state->monitor == NULL)
1210 return;
1211
1212 if (state->index == 0) {
1213 device_remove_file(&of_dev->dev, &dev_attr_cpu0_temperature);
1214 device_remove_file(&of_dev->dev, &dev_attr_cpu0_voltage);
1215 device_remove_file(&of_dev->dev, &dev_attr_cpu0_current);
1216 device_remove_file(&of_dev->dev, &dev_attr_cpu0_exhaust_fan_rpm);
1217 device_remove_file(&of_dev->dev, &dev_attr_cpu0_intake_fan_rpm);
1218 } else {
1219 device_remove_file(&of_dev->dev, &dev_attr_cpu1_temperature);
1220 device_remove_file(&of_dev->dev, &dev_attr_cpu1_voltage);
1221 device_remove_file(&of_dev->dev, &dev_attr_cpu1_current);
1222 device_remove_file(&of_dev->dev, &dev_attr_cpu1_exhaust_fan_rpm);
1223 device_remove_file(&of_dev->dev, &dev_attr_cpu1_intake_fan_rpm);
1224 }
1225
1226 state->monitor = NULL;
1227}
1228
1229/*
1230 * Motherboard backside & U3 heatsink fan control loop
1231 */
1232static void do_monitor_backside(struct backside_pid_state *state)
1233{
1234 s32 temp, integral, derivative, fan_min;
1235 s64 integ_p, deriv_p, prop_p, sum;
1236 int i, rc;
1237
1238 if (--state->ticks != 0)
1239 return;
1240 state->ticks = backside_params.interval;
1241
1242 DBG("backside:\n");
1243
1244 /* Check fan status */
1245 rc = get_pwm_fan(BACKSIDE_FAN_PWM_INDEX);
1246 if (rc < 0) {
1247 printk(KERN_WARNING "Error %d reading backside fan !\n", rc);
1248 /* XXX What do we do now ? */
1249 } else
1250 state->pwm = rc;
1251 DBG(" current pwm: %d\n", state->pwm);
1252
1253 /* Get some sensor readings */
1254 temp = i2c_smbus_read_byte_data(state->monitor, MAX6690_EXT_TEMP) << 16;
1255 state->last_temp = temp;
1256 DBG(" temp: %d.%03d, target: %d.%03d\n", FIX32TOPRINT(temp),
1257 FIX32TOPRINT(backside_params.input_target));
1258
1259 /* Store temperature and error in history array */
1260 state->cur_sample = (state->cur_sample + 1) % BACKSIDE_PID_HISTORY_SIZE;
1261 state->sample_history[state->cur_sample] = temp;
1262 state->error_history[state->cur_sample] = temp - backside_params.input_target;
1263
1264 /* If first loop, fill the history table */
1265 if (state->first) {
1266 for (i = 0; i < (BACKSIDE_PID_HISTORY_SIZE - 1); i++) {
1267 state->cur_sample = (state->cur_sample + 1) %
1268 BACKSIDE_PID_HISTORY_SIZE;
1269 state->sample_history[state->cur_sample] = temp;
1270 state->error_history[state->cur_sample] =
1271 temp - backside_params.input_target;
1272 }
1273 state->first = 0;
1274 }
1275
1276 /* Calculate the integral term */
1277 sum = 0;
1278 integral = 0;
1279 for (i = 0; i < BACKSIDE_PID_HISTORY_SIZE; i++)
1280 integral += state->error_history[i];
1281 integral *= backside_params.interval;
1282 DBG(" integral: %08x\n", integral);
1283 integ_p = ((s64)backside_params.G_r) * (s64)integral;
1284 DBG(" integ_p: %d\n", (int)(integ_p >> 36));
1285 sum += integ_p;
1286
1287 /* Calculate the derivative term */
1288 derivative = state->error_history[state->cur_sample] -
1289 state->error_history[(state->cur_sample + BACKSIDE_PID_HISTORY_SIZE - 1)
1290 % BACKSIDE_PID_HISTORY_SIZE];
1291 derivative /= backside_params.interval;
1292 deriv_p = ((s64)backside_params.G_d) * (s64)derivative;
1293 DBG(" deriv_p: %d\n", (int)(deriv_p >> 36));
1294 sum += deriv_p;
1295
1296 /* Calculate the proportional term */
1297 prop_p = ((s64)backside_params.G_p) * (s64)(state->error_history[state->cur_sample]);
1298 DBG(" prop_p: %d\n", (int)(prop_p >> 36));
1299 sum += prop_p;
1300
1301 /* Scale sum */
1302 sum >>= 36;
1303
1304 DBG(" sum: %d\n", (int)sum);
1305 if (backside_params.additive)
1306 state->pwm += (s32)sum;
1307 else
1308 state->pwm = sum;
1309
1310 /* Check for clamp */
1311 fan_min = (dimm_output_clamp * 100) / 14000;
1312 fan_min = max(fan_min, backside_params.output_min);
1313
1314 state->pwm = max(state->pwm, fan_min);
1315 state->pwm = min(state->pwm, backside_params.output_max);
1316
1317 DBG("** BACKSIDE PWM: %d\n", (int)state->pwm);
1318 set_pwm_fan(BACKSIDE_FAN_PWM_INDEX, state->pwm);
1319}
1320
1321/*
1322 * Initialize the state structure for the backside fan control loop
1323 */
1324static int init_backside_state(struct backside_pid_state *state)
1325{
1326 struct device_node *u3;
1327 int u3h = 1; /* conservative by default */
1328 int err;
1329
1330 /*
1331 * There are different PID params for machines with U3 and machines
1332 * with U3H, pick the right ones now
1333 */
1334 u3 = of_find_node_by_path("/u3@0,f8000000");
1335 if (u3 != NULL) {
1336 const u32 *vers = of_get_property(u3, "device-rev", NULL);
1337 if (vers)
1338 if (((*vers) & 0x3f) < 0x34)
1339 u3h = 0;
1340 of_node_put(u3);
1341 }
1342
1343 if (rackmac) {
1344 backside_params.G_d = BACKSIDE_PID_RACK_G_d;
1345 backside_params.input_target = BACKSIDE_PID_RACK_INPUT_TARGET;
1346 backside_params.output_min = BACKSIDE_PID_U3H_OUTPUT_MIN;
1347 backside_params.interval = BACKSIDE_PID_RACK_INTERVAL;
1348 backside_params.G_p = BACKSIDE_PID_RACK_G_p;
1349 backside_params.G_r = BACKSIDE_PID_G_r;
1350 backside_params.output_max = BACKSIDE_PID_OUTPUT_MAX;
1351 backside_params.additive = 0;
1352 } else if (u3h) {
1353 backside_params.G_d = BACKSIDE_PID_U3H_G_d;
1354 backside_params.input_target = BACKSIDE_PID_U3H_INPUT_TARGET;
1355 backside_params.output_min = BACKSIDE_PID_U3H_OUTPUT_MIN;
1356 backside_params.interval = BACKSIDE_PID_INTERVAL;
1357 backside_params.G_p = BACKSIDE_PID_G_p;
1358 backside_params.G_r = BACKSIDE_PID_G_r;
1359 backside_params.output_max = BACKSIDE_PID_OUTPUT_MAX;
1360 backside_params.additive = 1;
1361 } else {
1362 backside_params.G_d = BACKSIDE_PID_U3_G_d;
1363 backside_params.input_target = BACKSIDE_PID_U3_INPUT_TARGET;
1364 backside_params.output_min = BACKSIDE_PID_U3_OUTPUT_MIN;
1365 backside_params.interval = BACKSIDE_PID_INTERVAL;
1366 backside_params.G_p = BACKSIDE_PID_G_p;
1367 backside_params.G_r = BACKSIDE_PID_G_r;
1368 backside_params.output_max = BACKSIDE_PID_OUTPUT_MAX;
1369 backside_params.additive = 1;
1370 }
1371
1372 state->ticks = 1;
1373 state->first = 1;
1374 state->pwm = 50;
1375
1376 state->monitor = attach_i2c_chip(BACKSIDE_MAX_ID, "backside_temp");
1377 if (state->monitor == NULL)
1378 return -ENODEV;
1379
1380 err = device_create_file(&of_dev->dev, &dev_attr_backside_temperature);
1381 err |= device_create_file(&of_dev->dev, &dev_attr_backside_fan_pwm);
1382 if (err)
1383 printk(KERN_WARNING "Failed to create attribute file(s)"
1384 " for backside fan\n");
1385
1386 return 0;
1387}
1388
1389/*
1390 * Dispose of the state data for the backside control loop
1391 */
1392static void dispose_backside_state(struct backside_pid_state *state)
1393{
1394 if (state->monitor == NULL)
1395 return;
1396
1397 device_remove_file(&of_dev->dev, &dev_attr_backside_temperature);
1398 device_remove_file(&of_dev->dev, &dev_attr_backside_fan_pwm);
1399
1400 state->monitor = NULL;
1401}
1402
1403/*
1404 * Drives bay fan control loop
1405 */
1406static void do_monitor_drives(struct drives_pid_state *state)
1407{
1408 s32 temp, integral, derivative;
1409 s64 integ_p, deriv_p, prop_p, sum;
1410 int i, rc;
1411
1412 if (--state->ticks != 0)
1413 return;
1414 state->ticks = DRIVES_PID_INTERVAL;
1415
1416 DBG("drives:\n");
1417
1418 /* Check fan status */
1419 rc = get_rpm_fan(DRIVES_FAN_RPM_INDEX, !RPM_PID_USE_ACTUAL_SPEED);
1420 if (rc < 0) {
1421 printk(KERN_WARNING "Error %d reading drives fan !\n", rc);
1422 /* XXX What do we do now ? */
1423 } else
1424 state->rpm = rc;
1425 DBG(" current rpm: %d\n", state->rpm);
1426
1427 /* Get some sensor readings */
1428 temp = le16_to_cpu(i2c_smbus_read_word_data(state->monitor,
1429 DS1775_TEMP)) << 8;
1430 state->last_temp = temp;
1431 DBG(" temp: %d.%03d, target: %d.%03d\n", FIX32TOPRINT(temp),
1432 FIX32TOPRINT(DRIVES_PID_INPUT_TARGET));
1433
1434 /* Store temperature and error in history array */
1435 state->cur_sample = (state->cur_sample + 1) % DRIVES_PID_HISTORY_SIZE;
1436 state->sample_history[state->cur_sample] = temp;
1437 state->error_history[state->cur_sample] = temp - DRIVES_PID_INPUT_TARGET;
1438
1439 /* If first loop, fill the history table */
1440 if (state->first) {
1441 for (i = 0; i < (DRIVES_PID_HISTORY_SIZE - 1); i++) {
1442 state->cur_sample = (state->cur_sample + 1) %
1443 DRIVES_PID_HISTORY_SIZE;
1444 state->sample_history[state->cur_sample] = temp;
1445 state->error_history[state->cur_sample] =
1446 temp - DRIVES_PID_INPUT_TARGET;
1447 }
1448 state->first = 0;
1449 }
1450
1451 /* Calculate the integral term */
1452 sum = 0;
1453 integral = 0;
1454 for (i = 0; i < DRIVES_PID_HISTORY_SIZE; i++)
1455 integral += state->error_history[i];
1456 integral *= DRIVES_PID_INTERVAL;
1457 DBG(" integral: %08x\n", integral);
1458 integ_p = ((s64)DRIVES_PID_G_r) * (s64)integral;
1459 DBG(" integ_p: %d\n", (int)(integ_p >> 36));
1460 sum += integ_p;
1461
1462 /* Calculate the derivative term */
1463 derivative = state->error_history[state->cur_sample] -
1464 state->error_history[(state->cur_sample + DRIVES_PID_HISTORY_SIZE - 1)
1465 % DRIVES_PID_HISTORY_SIZE];
1466 derivative /= DRIVES_PID_INTERVAL;
1467 deriv_p = ((s64)DRIVES_PID_G_d) * (s64)derivative;
1468 DBG(" deriv_p: %d\n", (int)(deriv_p >> 36));
1469 sum += deriv_p;
1470
1471 /* Calculate the proportional term */
1472 prop_p = ((s64)DRIVES_PID_G_p) * (s64)(state->error_history[state->cur_sample]);
1473 DBG(" prop_p: %d\n", (int)(prop_p >> 36));
1474 sum += prop_p;
1475
1476 /* Scale sum */
1477 sum >>= 36;
1478
1479 DBG(" sum: %d\n", (int)sum);
1480 state->rpm += (s32)sum;
1481
1482 state->rpm = max(state->rpm, DRIVES_PID_OUTPUT_MIN);
1483 state->rpm = min(state->rpm, DRIVES_PID_OUTPUT_MAX);
1484
1485 DBG("** DRIVES RPM: %d\n", (int)state->rpm);
1486 set_rpm_fan(DRIVES_FAN_RPM_INDEX, state->rpm);
1487}
1488
1489/*
1490 * Initialize the state structure for the drives bay fan control loop
1491 */
1492static int init_drives_state(struct drives_pid_state *state)
1493{
1494 int err;
1495
1496 state->ticks = 1;
1497 state->first = 1;
1498 state->rpm = 1000;
1499
1500 state->monitor = attach_i2c_chip(DRIVES_DALLAS_ID, "drives_temp");
1501 if (state->monitor == NULL)
1502 return -ENODEV;
1503
1504 err = device_create_file(&of_dev->dev, &dev_attr_drives_temperature);
1505 err |= device_create_file(&of_dev->dev, &dev_attr_drives_fan_rpm);
1506 if (err)
1507 printk(KERN_WARNING "Failed to create attribute file(s)"
1508 " for drives bay fan\n");
1509
1510 return 0;
1511}
1512
1513/*
1514 * Dispose of the state data for the drives control loop
1515 */
1516static void dispose_drives_state(struct drives_pid_state *state)
1517{
1518 if (state->monitor == NULL)
1519 return;
1520
1521 device_remove_file(&of_dev->dev, &dev_attr_drives_temperature);
1522 device_remove_file(&of_dev->dev, &dev_attr_drives_fan_rpm);
1523
1524 state->monitor = NULL;
1525}
1526
1527/*
1528 * DIMMs temp control loop
1529 */
1530static void do_monitor_dimms(struct dimm_pid_state *state)
1531{
1532 s32 temp, integral, derivative, fan_min;
1533 s64 integ_p, deriv_p, prop_p, sum;
1534 int i;
1535
1536 if (--state->ticks != 0)
1537 return;
1538 state->ticks = DIMM_PID_INTERVAL;
1539
1540 DBG("DIMM:\n");
1541
1542 DBG(" current value: %d\n", state->output);
1543
1544 temp = read_lm87_reg(state->monitor, LM87_INT_TEMP);
1545 if (temp < 0)
1546 return;
1547 temp <<= 16;
1548 state->last_temp = temp;
1549 DBG(" temp: %d.%03d, target: %d.%03d\n", FIX32TOPRINT(temp),
1550 FIX32TOPRINT(DIMM_PID_INPUT_TARGET));
1551
1552 /* Store temperature and error in history array */
1553 state->cur_sample = (state->cur_sample + 1) % DIMM_PID_HISTORY_SIZE;
1554 state->sample_history[state->cur_sample] = temp;
1555 state->error_history[state->cur_sample] = temp - DIMM_PID_INPUT_TARGET;
1556
1557 /* If first loop, fill the history table */
1558 if (state->first) {
1559 for (i = 0; i < (DIMM_PID_HISTORY_SIZE - 1); i++) {
1560 state->cur_sample = (state->cur_sample + 1) %
1561 DIMM_PID_HISTORY_SIZE;
1562 state->sample_history[state->cur_sample] = temp;
1563 state->error_history[state->cur_sample] =
1564 temp - DIMM_PID_INPUT_TARGET;
1565 }
1566 state->first = 0;
1567 }
1568
1569 /* Calculate the integral term */
1570 sum = 0;
1571 integral = 0;
1572 for (i = 0; i < DIMM_PID_HISTORY_SIZE; i++)
1573 integral += state->error_history[i];
1574 integral *= DIMM_PID_INTERVAL;
1575 DBG(" integral: %08x\n", integral);
1576 integ_p = ((s64)DIMM_PID_G_r) * (s64)integral;
1577 DBG(" integ_p: %d\n", (int)(integ_p >> 36));
1578 sum += integ_p;
1579
1580 /* Calculate the derivative term */
1581 derivative = state->error_history[state->cur_sample] -
1582 state->error_history[(state->cur_sample + DIMM_PID_HISTORY_SIZE - 1)
1583 % DIMM_PID_HISTORY_SIZE];
1584 derivative /= DIMM_PID_INTERVAL;
1585 deriv_p = ((s64)DIMM_PID_G_d) * (s64)derivative;
1586 DBG(" deriv_p: %d\n", (int)(deriv_p >> 36));
1587 sum += deriv_p;
1588
1589 /* Calculate the proportional term */
1590 prop_p = ((s64)DIMM_PID_G_p) * (s64)(state->error_history[state->cur_sample]);
1591 DBG(" prop_p: %d\n", (int)(prop_p >> 36));
1592 sum += prop_p;
1593
1594 /* Scale sum */
1595 sum >>= 36;
1596
1597 DBG(" sum: %d\n", (int)sum);
1598 state->output = (s32)sum;
1599 state->output = max(state->output, DIMM_PID_OUTPUT_MIN);
1600 state->output = min(state->output, DIMM_PID_OUTPUT_MAX);
1601 dimm_output_clamp = state->output;
1602
1603 DBG("** DIMM clamp value: %d\n", (int)state->output);
1604
1605 /* Backside PID is only every 5 seconds, force backside fan clamping now */
1606 fan_min = (dimm_output_clamp * 100) / 14000;
1607 fan_min = max(fan_min, backside_params.output_min);
1608 if (backside_state.pwm < fan_min) {
1609 backside_state.pwm = fan_min;
1610 DBG(" -> applying clamp to backside fan now: %d !\n", fan_min);
1611 set_pwm_fan(BACKSIDE_FAN_PWM_INDEX, fan_min);
1612 }
1613}
1614
1615/*
1616 * Initialize the state structure for the DIMM temp control loop
1617 */
1618static int init_dimms_state(struct dimm_pid_state *state)
1619{
1620 state->ticks = 1;
1621 state->first = 1;
1622 state->output = 4000;
1623
1624 state->monitor = attach_i2c_chip(XSERVE_DIMMS_LM87, "dimms_temp");
1625 if (state->monitor == NULL)
1626 return -ENODEV;
1627
1628 if (device_create_file(&of_dev->dev, &dev_attr_dimms_temperature))
1629 printk(KERN_WARNING "Failed to create attribute file"
1630 " for DIMM temperature\n");
1631
1632 return 0;
1633}
1634
1635/*
1636 * Dispose of the state data for the DIMM control loop
1637 */
1638static void dispose_dimms_state(struct dimm_pid_state *state)
1639{
1640 if (state->monitor == NULL)
1641 return;
1642
1643 device_remove_file(&of_dev->dev, &dev_attr_dimms_temperature);
1644
1645 state->monitor = NULL;
1646}
1647
1648/*
1649 * Slots fan control loop
1650 */
1651static void do_monitor_slots(struct slots_pid_state *state)
1652{
1653 s32 temp, integral, derivative;
1654 s64 integ_p, deriv_p, prop_p, sum;
1655 int i, rc;
1656
1657 if (--state->ticks != 0)
1658 return;
1659 state->ticks = SLOTS_PID_INTERVAL;
1660
1661 DBG("slots:\n");
1662
1663 /* Check fan status */
1664 rc = get_pwm_fan(SLOTS_FAN_PWM_INDEX);
1665 if (rc < 0) {
1666 printk(KERN_WARNING "Error %d reading slots fan !\n", rc);
1667 /* XXX What do we do now ? */
1668 } else
1669 state->pwm = rc;
1670 DBG(" current pwm: %d\n", state->pwm);
1671
1672 /* Get some sensor readings */
1673 temp = le16_to_cpu(i2c_smbus_read_word_data(state->monitor,
1674 DS1775_TEMP)) << 8;
1675 state->last_temp = temp;
1676 DBG(" temp: %d.%03d, target: %d.%03d\n", FIX32TOPRINT(temp),
1677 FIX32TOPRINT(SLOTS_PID_INPUT_TARGET));
1678
1679 /* Store temperature and error in history array */
1680 state->cur_sample = (state->cur_sample + 1) % SLOTS_PID_HISTORY_SIZE;
1681 state->sample_history[state->cur_sample] = temp;
1682 state->error_history[state->cur_sample] = temp - SLOTS_PID_INPUT_TARGET;
1683
1684 /* If first loop, fill the history table */
1685 if (state->first) {
1686 for (i = 0; i < (SLOTS_PID_HISTORY_SIZE - 1); i++) {
1687 state->cur_sample = (state->cur_sample + 1) %
1688 SLOTS_PID_HISTORY_SIZE;
1689 state->sample_history[state->cur_sample] = temp;
1690 state->error_history[state->cur_sample] =
1691 temp - SLOTS_PID_INPUT_TARGET;
1692 }
1693 state->first = 0;
1694 }
1695
1696 /* Calculate the integral term */
1697 sum = 0;
1698 integral = 0;
1699 for (i = 0; i < SLOTS_PID_HISTORY_SIZE; i++)
1700 integral += state->error_history[i];
1701 integral *= SLOTS_PID_INTERVAL;
1702 DBG(" integral: %08x\n", integral);
1703 integ_p = ((s64)SLOTS_PID_G_r) * (s64)integral;
1704 DBG(" integ_p: %d\n", (int)(integ_p >> 36));
1705 sum += integ_p;
1706
1707 /* Calculate the derivative term */
1708 derivative = state->error_history[state->cur_sample] -
1709 state->error_history[(state->cur_sample + SLOTS_PID_HISTORY_SIZE - 1)
1710 % SLOTS_PID_HISTORY_SIZE];
1711 derivative /= SLOTS_PID_INTERVAL;
1712 deriv_p = ((s64)SLOTS_PID_G_d) * (s64)derivative;
1713 DBG(" deriv_p: %d\n", (int)(deriv_p >> 36));
1714 sum += deriv_p;
1715
1716 /* Calculate the proportional term */
1717 prop_p = ((s64)SLOTS_PID_G_p) * (s64)(state->error_history[state->cur_sample]);
1718 DBG(" prop_p: %d\n", (int)(prop_p >> 36));
1719 sum += prop_p;
1720
1721 /* Scale sum */
1722 sum >>= 36;
1723
1724 DBG(" sum: %d\n", (int)sum);
1725 state->pwm = (s32)sum;
1726
1727 state->pwm = max(state->pwm, SLOTS_PID_OUTPUT_MIN);
1728 state->pwm = min(state->pwm, SLOTS_PID_OUTPUT_MAX);
1729
1730 DBG("** DRIVES PWM: %d\n", (int)state->pwm);
1731 set_pwm_fan(SLOTS_FAN_PWM_INDEX, state->pwm);
1732}
1733
1734/*
1735 * Initialize the state structure for the slots bay fan control loop
1736 */
1737static int init_slots_state(struct slots_pid_state *state)
1738{
1739 int err;
1740
1741 state->ticks = 1;
1742 state->first = 1;
1743 state->pwm = 50;
1744
1745 state->monitor = attach_i2c_chip(XSERVE_SLOTS_LM75, "slots_temp");
1746 if (state->monitor == NULL)
1747 return -ENODEV;
1748
1749 err = device_create_file(&of_dev->dev, &dev_attr_slots_temperature);
1750 err |= device_create_file(&of_dev->dev, &dev_attr_slots_fan_pwm);
1751 if (err)
1752 printk(KERN_WARNING "Failed to create attribute file(s)"
1753 " for slots bay fan\n");
1754
1755 return 0;
1756}
1757
1758/*
1759 * Dispose of the state data for the slots control loop
1760 */
1761static void dispose_slots_state(struct slots_pid_state *state)
1762{
1763 if (state->monitor == NULL)
1764 return;
1765
1766 device_remove_file(&of_dev->dev, &dev_attr_slots_temperature);
1767 device_remove_file(&of_dev->dev, &dev_attr_slots_fan_pwm);
1768
1769 state->monitor = NULL;
1770}
1771
1772
1773static int call_critical_overtemp(void)
1774{
1775 char *argv[] = { critical_overtemp_path, NULL };
1776 static char *envp[] = { "HOME=/",
1777 "TERM=linux",
1778 "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
1779 NULL };
1780
1781 return call_usermodehelper(critical_overtemp_path,
1782 argv, envp, UMH_WAIT_EXEC);
1783}
1784
1785
1786/*
1787 * Here's the kernel thread that calls the various control loops
1788 */
1789static int main_control_loop(void *x)
1790{
1791 DBG("main_control_loop started\n");
1792
1793 mutex_lock(&driver_lock);
1794
1795 if (start_fcu() < 0) {
1796 printk(KERN_ERR "kfand: failed to start FCU\n");
1797 mutex_unlock(&driver_lock);
1798 goto out;
1799 }
1800
1801 /* Set the PCI fan once for now on non-RackMac */
1802 if (!rackmac)
1803 set_pwm_fan(SLOTS_FAN_PWM_INDEX, SLOTS_FAN_DEFAULT_PWM);
1804
1805 /* Initialize ADCs */
1806 initialize_adc(&processor_state[0]);
1807 if (processor_state[1].monitor != NULL)
1808 initialize_adc(&processor_state[1]);
1809
1810 fcu_tickle_ticks = FCU_TICKLE_TICKS;
1811
1812 mutex_unlock(&driver_lock);
1813
1814 while (state == state_attached) {
1815 unsigned long elapsed, start;
1816
1817 start = jiffies;
1818
1819 mutex_lock(&driver_lock);
1820
1821 /* Tickle the FCU just in case */
1822 if (--fcu_tickle_ticks < 0) {
1823 fcu_tickle_ticks = FCU_TICKLE_TICKS;
1824 tickle_fcu();
1825 }
1826
1827 /* First, we always calculate the new DIMMs state on an Xserve */
1828 if (rackmac)
1829 do_monitor_dimms(&dimms_state);
1830
1831 /* Then, the CPUs */
1832 if (cpu_pid_type == CPU_PID_TYPE_COMBINED)
1833 do_monitor_cpu_combined();
1834 else if (cpu_pid_type == CPU_PID_TYPE_RACKMAC) {
1835 do_monitor_cpu_rack(&processor_state[0]);
1836 if (processor_state[1].monitor != NULL)
1837 do_monitor_cpu_rack(&processor_state[1]);
1838 // better deal with UP
1839 } else {
1840 do_monitor_cpu_split(&processor_state[0]);
1841 if (processor_state[1].monitor != NULL)
1842 do_monitor_cpu_split(&processor_state[1]);
1843 // better deal with UP
1844 }
1845 /* Then, the rest */
1846 do_monitor_backside(&backside_state);
1847 if (rackmac)
1848 do_monitor_slots(&slots_state);
1849 else
1850 do_monitor_drives(&drives_state);
1851 mutex_unlock(&driver_lock);
1852
1853 if (critical_state == 1) {
1854 printk(KERN_WARNING "Temperature control detected a critical condition\n");
1855 printk(KERN_WARNING "Attempting to shut down...\n");
1856 if (call_critical_overtemp()) {
1857 printk(KERN_WARNING "Can't call %s, power off now!\n",
1858 critical_overtemp_path);
1859 machine_power_off();
1860 }
1861 }
1862 if (critical_state > 0)
1863 critical_state++;
1864 if (critical_state > MAX_CRITICAL_STATE) {
1865 printk(KERN_WARNING "Shutdown timed out, power off now !\n");
1866 machine_power_off();
1867 }
1868
1869 // FIXME: Deal with signals
1870 elapsed = jiffies - start;
1871 if (elapsed < HZ)
1872 schedule_timeout_interruptible(HZ - elapsed);
1873 }
1874
1875 out:
1876 DBG("main_control_loop ended\n");
1877
1878 ctrl_task = 0;
1879 complete_and_exit(&ctrl_complete, 0);
1880}
1881
1882/*
1883 * Dispose the control loops when tearing down
1884 */
1885static void dispose_control_loops(void)
1886{
1887 dispose_processor_state(&processor_state[0]);
1888 dispose_processor_state(&processor_state[1]);
1889 dispose_backside_state(&backside_state);
1890 dispose_drives_state(&drives_state);
1891 dispose_slots_state(&slots_state);
1892 dispose_dimms_state(&dimms_state);
1893}
1894
1895/*
1896 * Create the control loops. U3-0 i2c bus is up, so we can now
1897 * get to the various sensors
1898 */
1899static int create_control_loops(void)
1900{
1901 struct device_node *np;
1902
1903 /* Count CPUs from the device-tree, we don't care how many are
1904 * actually used by Linux
1905 */
1906 cpu_count = 0;
1907 for (np = NULL; NULL != (np = of_find_node_by_type(np, "cpu"));)
1908 cpu_count++;
1909
1910 DBG("counted %d CPUs in the device-tree\n", cpu_count);
1911
1912 /* Decide the type of PID algorithm to use based on the presence of
1913 * the pumps, though that may not be the best way, that is good enough
1914 * for now
1915 */
1916 if (rackmac)
1917 cpu_pid_type = CPU_PID_TYPE_RACKMAC;
1918 else if (of_machine_is_compatible("PowerMac7,3")
1919 && (cpu_count > 1)
1920 && fcu_fans[CPUA_PUMP_RPM_INDEX].id != FCU_FAN_ABSENT_ID
1921 && fcu_fans[CPUB_PUMP_RPM_INDEX].id != FCU_FAN_ABSENT_ID) {
1922 printk(KERN_INFO "Liquid cooling pumps detected, using new algorithm !\n");
1923 cpu_pid_type = CPU_PID_TYPE_COMBINED;
1924 } else
1925 cpu_pid_type = CPU_PID_TYPE_SPLIT;
1926
1927 /* Create control loops for everything. If any fail, everything
1928 * fails
1929 */
1930 if (init_processor_state(&processor_state[0], 0))
1931 goto fail;
1932 if (cpu_pid_type == CPU_PID_TYPE_COMBINED)
1933 fetch_cpu_pumps_minmax();
1934
1935 if (cpu_count > 1 && init_processor_state(&processor_state[1], 1))
1936 goto fail;
1937 if (init_backside_state(&backside_state))
1938 goto fail;
1939 if (rackmac && init_dimms_state(&dimms_state))
1940 goto fail;
1941 if (rackmac && init_slots_state(&slots_state))
1942 goto fail;
1943 if (!rackmac && init_drives_state(&drives_state))
1944 goto fail;
1945
1946 DBG("all control loops up !\n");
1947
1948 return 0;
1949
1950 fail:
1951 DBG("failure creating control loops, disposing\n");
1952
1953 dispose_control_loops();
1954
1955 return -ENODEV;
1956}
1957
1958/*
1959 * Start the control loops after everything is up, that is create
1960 * the thread that will make them run
1961 */
1962static void start_control_loops(void)
1963{
1964 init_completion(&ctrl_complete);
1965
1966 ctrl_task = kthread_run(main_control_loop, NULL, "kfand");
1967}
1968
1969/*
1970 * Stop the control loops when tearing down
1971 */
1972static void stop_control_loops(void)
1973{
1974 if (ctrl_task)
1975 wait_for_completion(&ctrl_complete);
1976}
1977
1978/*
1979 * Attach to the i2c FCU after detecting U3-1 bus
1980 */
1981static int attach_fcu(void)
1982{
1983 fcu = attach_i2c_chip(FAN_CTRLER_ID, "fcu");
1984 if (fcu == NULL)
1985 return -ENODEV;
1986
1987 DBG("FCU attached\n");
1988
1989 return 0;
1990}
1991
1992/*
1993 * Detach from the i2c FCU when tearing down
1994 */
1995static void detach_fcu(void)
1996{
1997 fcu = NULL;
1998}
1999
2000/*
2001 * Attach to the i2c controller. We probe the various chips based
2002 * on the device-tree nodes and build everything for the driver to
2003 * run, we then kick the driver monitoring thread
2004 */
2005static int therm_pm72_attach(struct i2c_adapter *adapter)
2006{
2007 mutex_lock(&driver_lock);
2008
2009 /* Check state */
2010 if (state == state_detached)
2011 state = state_attaching;
2012 if (state != state_attaching) {
2013 mutex_unlock(&driver_lock);
2014 return 0;
2015 }
2016
2017 /* Check if we are looking for one of these */
2018 if (u3_0 == NULL && !strcmp(adapter->name, "u3 0")) {
2019 u3_0 = adapter;
2020 DBG("found U3-0\n");
2021 if (k2 || !rackmac)
2022 if (create_control_loops())
2023 u3_0 = NULL;
2024 } else if (u3_1 == NULL && !strcmp(adapter->name, "u3 1")) {
2025 u3_1 = adapter;
2026 DBG("found U3-1, attaching FCU\n");
2027 if (attach_fcu())
2028 u3_1 = NULL;
2029 } else if (k2 == NULL && !strcmp(adapter->name, "mac-io 0")) {
2030 k2 = adapter;
2031 DBG("Found K2\n");
2032 if (u3_0 && rackmac)
2033 if (create_control_loops())
2034 k2 = NULL;
2035 }
2036 /* We got all we need, start control loops */
2037 if (u3_0 != NULL && u3_1 != NULL && (k2 || !rackmac)) {
2038 DBG("everything up, starting control loops\n");
2039 state = state_attached;
2040 start_control_loops();
2041 }
2042 mutex_unlock(&driver_lock);
2043
2044 return 0;
2045}
2046
2047static int therm_pm72_probe(struct i2c_client *client,
2048 const struct i2c_device_id *id)
2049{
2050 /* Always succeed, the real work was done in therm_pm72_attach() */
2051 return 0;
2052}
2053
2054/*
2055 * Called when any of the devices which participates into thermal management
2056 * is going away.
2057 */
2058static int therm_pm72_remove(struct i2c_client *client)
2059{
2060 struct i2c_adapter *adapter = client->adapter;
2061
2062 mutex_lock(&driver_lock);
2063
2064 if (state != state_detached)
2065 state = state_detaching;
2066
2067 /* Stop control loops if any */
2068 DBG("stopping control loops\n");
2069 mutex_unlock(&driver_lock);
2070 stop_control_loops();
2071 mutex_lock(&driver_lock);
2072
2073 if (u3_0 != NULL && !strcmp(adapter->name, "u3 0")) {
2074 DBG("lost U3-0, disposing control loops\n");
2075 dispose_control_loops();
2076 u3_0 = NULL;
2077 }
2078
2079 if (u3_1 != NULL && !strcmp(adapter->name, "u3 1")) {
2080 DBG("lost U3-1, detaching FCU\n");
2081 detach_fcu();
2082 u3_1 = NULL;
2083 }
2084 if (u3_0 == NULL && u3_1 == NULL)
2085 state = state_detached;
2086
2087 mutex_unlock(&driver_lock);
2088
2089 return 0;
2090}
2091
2092/*
2093 * i2c_driver structure to attach to the host i2c controller
2094 */
2095
2096static const struct i2c_device_id therm_pm72_id[] = {
2097 /*
2098 * Fake device name, thermal management is done by several
2099 * chips but we don't need to differentiate between them at
2100 * this point.
2101 */
2102 { "therm_pm72", 0 },
2103 { }
2104};
2105
2106static struct i2c_driver therm_pm72_driver = {
2107 .driver = {
2108 .name = "therm_pm72",
2109 },
2110 .attach_adapter = therm_pm72_attach,
2111 .probe = therm_pm72_probe,
2112 .remove = therm_pm72_remove,
2113 .id_table = therm_pm72_id,
2114};
2115
2116static int fan_check_loc_match(const char *loc, int fan)
2117{
2118 char tmp[64];
2119 char *c, *e;
2120
2121 strlcpy(tmp, fcu_fans[fan].loc, 64);
2122
2123 c = tmp;
2124 for (;;) {
2125 e = strchr(c, ',');
2126 if (e)
2127 *e = 0;
2128 if (strcmp(loc, c) == 0)
2129 return 1;
2130 if (e == NULL)
2131 break;
2132 c = e + 1;
2133 }
2134 return 0;
2135}
2136
2137static void fcu_lookup_fans(struct device_node *fcu_node)
2138{
2139 struct device_node *np = NULL;
2140 int i;
2141
2142 /* The table is filled by default with values that are suitable
2143 * for the old machines without device-tree informations. We scan
2144 * the device-tree and override those values with whatever is
2145 * there
2146 */
2147
2148 DBG("Looking up FCU controls in device-tree...\n");
2149
2150 while ((np = of_get_next_child(fcu_node, np)) != NULL) {
2151 int type = -1;
2152 const char *loc;
2153 const u32 *reg;
2154
2155 DBG(" control: %s, type: %s\n", np->name, np->type);
2156
2157 /* Detect control type */
2158 if (!strcmp(np->type, "fan-rpm-control") ||
2159 !strcmp(np->type, "fan-rpm"))
2160 type = FCU_FAN_RPM;
2161 if (!strcmp(np->type, "fan-pwm-control") ||
2162 !strcmp(np->type, "fan-pwm"))
2163 type = FCU_FAN_PWM;
2164 /* Only care about fans for now */
2165 if (type == -1)
2166 continue;
2167
2168 /* Lookup for a matching location */
2169 loc = of_get_property(np, "location", NULL);
2170 reg = of_get_property(np, "reg", NULL);
2171 if (loc == NULL || reg == NULL)
2172 continue;
2173 DBG(" matching location: %s, reg: 0x%08x\n", loc, *reg);
2174
2175 for (i = 0; i < FCU_FAN_COUNT; i++) {
2176 int fan_id;
2177
2178 if (!fan_check_loc_match(loc, i))
2179 continue;
2180 DBG(" location match, index: %d\n", i);
2181 fcu_fans[i].id = FCU_FAN_ABSENT_ID;
2182 if (type != fcu_fans[i].type) {
2183 printk(KERN_WARNING "therm_pm72: Fan type mismatch "
2184 "in device-tree for %s\n", np->full_name);
2185 break;
2186 }
2187 if (type == FCU_FAN_RPM)
2188 fan_id = ((*reg) - 0x10) / 2;
2189 else
2190 fan_id = ((*reg) - 0x30) / 2;
2191 if (fan_id > 7) {
2192 printk(KERN_WARNING "therm_pm72: Can't parse "
2193 "fan ID in device-tree for %s\n", np->full_name);
2194 break;
2195 }
2196 DBG(" fan id -> %d, type -> %d\n", fan_id, type);
2197 fcu_fans[i].id = fan_id;
2198 }
2199 }
2200
2201 /* Now dump the array */
2202 printk(KERN_INFO "Detected fan controls:\n");
2203 for (i = 0; i < FCU_FAN_COUNT; i++) {
2204 if (fcu_fans[i].id == FCU_FAN_ABSENT_ID)
2205 continue;
2206 printk(KERN_INFO " %d: %s fan, id %d, location: %s\n", i,
2207 fcu_fans[i].type == FCU_FAN_RPM ? "RPM" : "PWM",
2208 fcu_fans[i].id, fcu_fans[i].loc);
2209 }
2210}
2211
2212static int fcu_of_probe(struct platform_device* dev)
2213{
2214 state = state_detached;
2215 of_dev = dev;
2216
2217 dev_info(&dev->dev, "PowerMac G5 Thermal control driver %s\n", VERSION);
2218
2219 /* Lookup the fans in the device tree */
2220 fcu_lookup_fans(dev->dev.of_node);
2221
2222 /* Add the driver */
2223 return i2c_add_driver(&therm_pm72_driver);
2224}
2225
2226static int fcu_of_remove(struct platform_device* dev)
2227{
2228 i2c_del_driver(&therm_pm72_driver);
2229
2230 return 0;
2231}
2232
2233static const struct of_device_id fcu_match[] =
2234{
2235 {
2236 .type = "fcu",
2237 },
2238 {},
2239};
2240MODULE_DEVICE_TABLE(of, fcu_match);
2241
2242static struct platform_driver fcu_of_platform_driver =
2243{
2244 .driver = {
2245 .name = "temperature",
2246 .of_match_table = fcu_match,
2247 },
2248 .probe = fcu_of_probe,
2249 .remove = fcu_of_remove
2250};
2251
2252/*
2253 * Check machine type, attach to i2c controller
2254 */
2255static int __init therm_pm72_init(void)
2256{
2257 rackmac = of_machine_is_compatible("RackMac3,1");
2258
2259 if (!of_machine_is_compatible("PowerMac7,2") &&
2260 !of_machine_is_compatible("PowerMac7,3") &&
2261 !rackmac)
2262 return -ENODEV;
2263
2264 return platform_driver_register(&fcu_of_platform_driver);
2265}
2266
2267static void __exit therm_pm72_exit(void)
2268{
2269 platform_driver_unregister(&fcu_of_platform_driver);
2270}
2271
2272module_init(therm_pm72_init);
2273module_exit(therm_pm72_exit);
2274
2275MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>");
2276MODULE_DESCRIPTION("Driver for Apple's PowerMac G5 thermal control");
2277MODULE_LICENSE("GPL");
2278
diff --git a/drivers/macintosh/therm_pm72.h b/drivers/macintosh/therm_pm72.h
deleted file mode 100644
index df3680e2a22f..000000000000
--- a/drivers/macintosh/therm_pm72.h
+++ /dev/null
@@ -1,326 +0,0 @@
1#ifndef __THERM_PMAC_7_2_H__
2#define __THERM_PMAC_7_2_H__
3
4typedef unsigned short fu16;
5typedef int fs32;
6typedef short fs16;
7
8struct mpu_data
9{
10 u8 signature; /* 0x00 - EEPROM sig. */
11 u8 bytes_used; /* 0x01 - Bytes used in eeprom (160 ?) */
12 u8 size; /* 0x02 - EEPROM size (256 ?) */
13 u8 version; /* 0x03 - EEPROM version */
14 u32 data_revision; /* 0x04 - Dataset revision */
15 u8 processor_bin_code[3]; /* 0x08 - Processor BIN code */
16 u8 bin_code_expansion; /* 0x0b - ??? (padding ?) */
17 u8 processor_num; /* 0x0c - Number of CPUs on this MPU */
18 u8 input_mul_bus_div; /* 0x0d - Clock input multiplier/bus divider */
19 u8 reserved1[2]; /* 0x0e - */
20 u32 input_clk_freq_high; /* 0x10 - Input clock frequency high */
21 u8 cpu_nb_target_cycles; /* 0x14 - ??? */
22 u8 cpu_statlat; /* 0x15 - ??? */
23 u8 cpu_snooplat; /* 0x16 - ??? */
24 u8 cpu_snoopacc; /* 0x17 - ??? */
25 u8 nb_paamwin; /* 0x18 - ??? */
26 u8 nb_statlat; /* 0x19 - ??? */
27 u8 nb_snooplat; /* 0x1a - ??? */
28 u8 nb_snoopwin; /* 0x1b - ??? */
29 u8 api_bus_mode; /* 0x1c - ??? */
30 u8 reserved2[3]; /* 0x1d - */
31 u32 input_clk_freq_low; /* 0x20 - Input clock frequency low */
32 u8 processor_card_slot; /* 0x24 - Processor card slot number */
33 u8 reserved3[2]; /* 0x25 - */
34 u8 padjmax; /* 0x27 - Max power adjustment (Not in OF!) */
35 u8 ttarget; /* 0x28 - Target temperature */
36 u8 tmax; /* 0x29 - Max temperature */
37 u8 pmaxh; /* 0x2a - Max power */
38 u8 tguardband; /* 0x2b - Guardband temp ??? Hist. len in OSX */
39 fs32 pid_gp; /* 0x2c - PID proportional gain */
40 fs32 pid_gr; /* 0x30 - PID reset gain */
41 fs32 pid_gd; /* 0x34 - PID derivative gain */
42 fu16 voph; /* 0x38 - Vop High */
43 fu16 vopl; /* 0x3a - Vop Low */
44 fs16 nactual_die; /* 0x3c - nActual Die */
45 fs16 nactual_heatsink; /* 0x3e - nActual Heatsink */
46 fs16 nactual_system; /* 0x40 - nActual System */
47 u16 calibration_flags; /* 0x42 - Calibration flags */
48 fu16 mdiode; /* 0x44 - Diode M value (scaling factor) */
49 fs16 bdiode; /* 0x46 - Diode B value (offset) */
50 fs32 theta_heat_sink; /* 0x48 - Theta heat sink */
51 u16 rminn_intake_fan; /* 0x4c - Intake fan min RPM */
52 u16 rmaxn_intake_fan; /* 0x4e - Intake fan max RPM */
53 u16 rminn_exhaust_fan; /* 0x50 - Exhaust fan min RPM */
54 u16 rmaxn_exhaust_fan; /* 0x52 - Exhaust fan max RPM */
55 u8 processor_part_num[8]; /* 0x54 - Processor part number XX pumps min/max */
56 u32 processor_lot_num; /* 0x5c - Processor lot number */
57 u8 orig_card_sernum[0x10]; /* 0x60 - Card original serial number */
58 u8 curr_card_sernum[0x10]; /* 0x70 - Card current serial number */
59 u8 mlb_sernum[0x18]; /* 0x80 - MLB serial number */
60 u32 checksum1; /* 0x98 - */
61 u32 checksum2; /* 0x9c - */
62}; /* Total size = 0xa0 */
63
64/* Display a 16.16 fixed point value */
65#define FIX32TOPRINT(f) ((f) >> 16),((((f) & 0xffff) * 1000) >> 16)
66
67/*
68 * Maximum number of seconds to be in critical state (after a
69 * normal shutdown attempt). If the machine isn't down after
70 * this counter elapses, we force an immediate machine power
71 * off.
72 */
73#define MAX_CRITICAL_STATE 30
74static char * critical_overtemp_path = "/sbin/critical_overtemp";
75
76/*
77 * This option is "weird" :) Basically, if you define this to 1
78 * the control loop for the RPMs fans (not PWMs) will apply the
79 * correction factor obtained from the PID to the _actual_ RPM
80 * speed read from the FCU.
81 * If you define the below constant to 0, then it will be
82 * applied to the setpoint RPM speed, that is basically the
83 * speed we proviously "asked" for.
84 *
85 * I'm not sure which of these Apple's algorithm is supposed
86 * to use
87 */
88#define RPM_PID_USE_ACTUAL_SPEED 0
89
90/*
91 * i2c IDs. Currently, we hard code those and assume that
92 * the FCU is on U3 bus 1 while all sensors are on U3 bus
93 * 0. This appear to be safe enough for this first version
94 * of the driver, though I would accept any clean patch
95 * doing a better use of the device-tree without turning the
96 * while i2c registration mechanism into a racy mess
97 *
98 * Note: Xserve changed this. We have some bits on the K2 bus,
99 * which I arbitrarily set to 0x200. Ultimately, we really want
100 * too lookup these in the device-tree though
101 */
102#define FAN_CTRLER_ID 0x15e
103#define SUPPLY_MONITOR_ID 0x58
104#define SUPPLY_MONITORB_ID 0x5a
105#define DRIVES_DALLAS_ID 0x94
106#define BACKSIDE_MAX_ID 0x98
107#define XSERVE_DIMMS_LM87 0x25a
108#define XSERVE_SLOTS_LM75 0x290
109
110/*
111 * Some MAX6690, DS1775, LM87 register definitions
112 */
113#define MAX6690_INT_TEMP 0
114#define MAX6690_EXT_TEMP 1
115#define DS1775_TEMP 0
116#define LM87_INT_TEMP 0x27
117
118/*
119 * Scaling factors for the AD7417 ADC converters (except
120 * for the CPU diode which is obtained from the EEPROM).
121 * Those values are obtained from the property list of
122 * the darwin driver
123 */
124#define ADC_12V_CURRENT_SCALE 0x0320 /* _AD2 */
125#define ADC_CPU_VOLTAGE_SCALE 0x00a0 /* _AD3 */
126#define ADC_CPU_CURRENT_SCALE 0x1f40 /* _AD4 */
127
128/*
129 * PID factors for the U3/Backside fan control loop. We have 2 sets
130 * of values here, one set for U3 and one set for U3H
131 */
132#define BACKSIDE_FAN_PWM_DEFAULT_ID 1
133#define BACKSIDE_FAN_PWM_INDEX 0
134#define BACKSIDE_PID_U3_G_d 0x02800000
135#define BACKSIDE_PID_U3H_G_d 0x01400000
136#define BACKSIDE_PID_RACK_G_d 0x00500000
137#define BACKSIDE_PID_G_p 0x00500000
138#define BACKSIDE_PID_RACK_G_p 0x0004cccc
139#define BACKSIDE_PID_G_r 0x00000000
140#define BACKSIDE_PID_U3_INPUT_TARGET 0x00410000
141#define BACKSIDE_PID_U3H_INPUT_TARGET 0x004b0000
142#define BACKSIDE_PID_RACK_INPUT_TARGET 0x00460000
143#define BACKSIDE_PID_INTERVAL 5
144#define BACKSIDE_PID_RACK_INTERVAL 1
145#define BACKSIDE_PID_OUTPUT_MAX 100
146#define BACKSIDE_PID_U3_OUTPUT_MIN 20
147#define BACKSIDE_PID_U3H_OUTPUT_MIN 20
148#define BACKSIDE_PID_HISTORY_SIZE 2
149
150struct basckside_pid_params
151{
152 s32 G_d;
153 s32 G_p;
154 s32 G_r;
155 s32 input_target;
156 s32 output_min;
157 s32 output_max;
158 s32 interval;
159 int additive;
160};
161
162struct backside_pid_state
163{
164 int ticks;
165 struct i2c_client * monitor;
166 s32 sample_history[BACKSIDE_PID_HISTORY_SIZE];
167 s32 error_history[BACKSIDE_PID_HISTORY_SIZE];
168 int cur_sample;
169 s32 last_temp;
170 int pwm;
171 int first;
172};
173
174/*
175 * PID factors for the Drive Bay fan control loop
176 */
177#define DRIVES_FAN_RPM_DEFAULT_ID 2
178#define DRIVES_FAN_RPM_INDEX 1
179#define DRIVES_PID_G_d 0x01e00000
180#define DRIVES_PID_G_p 0x00500000
181#define DRIVES_PID_G_r 0x00000000
182#define DRIVES_PID_INPUT_TARGET 0x00280000
183#define DRIVES_PID_INTERVAL 5
184#define DRIVES_PID_OUTPUT_MAX 4000
185#define DRIVES_PID_OUTPUT_MIN 300
186#define DRIVES_PID_HISTORY_SIZE 2
187
188struct drives_pid_state
189{
190 int ticks;
191 struct i2c_client * monitor;
192 s32 sample_history[BACKSIDE_PID_HISTORY_SIZE];
193 s32 error_history[BACKSIDE_PID_HISTORY_SIZE];
194 int cur_sample;
195 s32 last_temp;
196 int rpm;
197 int first;
198};
199
200#define SLOTS_FAN_PWM_DEFAULT_ID 2
201#define SLOTS_FAN_PWM_INDEX 2
202#define SLOTS_FAN_DEFAULT_PWM 40 /* Do better here ! */
203
204
205/*
206 * PID factors for the Xserve DIMM control loop
207 */
208#define DIMM_PID_G_d 0
209#define DIMM_PID_G_p 0
210#define DIMM_PID_G_r 0x06553600
211#define DIMM_PID_INPUT_TARGET 3276800
212#define DIMM_PID_INTERVAL 1
213#define DIMM_PID_OUTPUT_MAX 14000
214#define DIMM_PID_OUTPUT_MIN 4000
215#define DIMM_PID_HISTORY_SIZE 20
216
217struct dimm_pid_state
218{
219 int ticks;
220 struct i2c_client * monitor;
221 s32 sample_history[DIMM_PID_HISTORY_SIZE];
222 s32 error_history[DIMM_PID_HISTORY_SIZE];
223 int cur_sample;
224 s32 last_temp;
225 int first;
226 int output;
227};
228
229
230/*
231 * PID factors for the Xserve Slots control loop
232 */
233#define SLOTS_PID_G_d 0
234#define SLOTS_PID_G_p 0
235#define SLOTS_PID_G_r 0x00100000
236#define SLOTS_PID_INPUT_TARGET 3200000
237#define SLOTS_PID_INTERVAL 1
238#define SLOTS_PID_OUTPUT_MAX 100
239#define SLOTS_PID_OUTPUT_MIN 20
240#define SLOTS_PID_HISTORY_SIZE 20
241
242struct slots_pid_state
243{
244 int ticks;
245 struct i2c_client * monitor;
246 s32 sample_history[SLOTS_PID_HISTORY_SIZE];
247 s32 error_history[SLOTS_PID_HISTORY_SIZE];
248 int cur_sample;
249 s32 last_temp;
250 int first;
251 int pwm;
252};
253
254
255
256/* Desktops */
257
258#define CPUA_INTAKE_FAN_RPM_DEFAULT_ID 3
259#define CPUA_EXHAUST_FAN_RPM_DEFAULT_ID 4
260#define CPUB_INTAKE_FAN_RPM_DEFAULT_ID 5
261#define CPUB_EXHAUST_FAN_RPM_DEFAULT_ID 6
262
263#define CPUA_INTAKE_FAN_RPM_INDEX 3
264#define CPUA_EXHAUST_FAN_RPM_INDEX 4
265#define CPUB_INTAKE_FAN_RPM_INDEX 5
266#define CPUB_EXHAUST_FAN_RPM_INDEX 6
267
268#define CPU_INTAKE_SCALE 0x0000f852
269#define CPU_TEMP_HISTORY_SIZE 2
270#define CPU_POWER_HISTORY_SIZE 10
271#define CPU_PID_INTERVAL 1
272#define CPU_MAX_OVERTEMP 90
273
274#define CPUA_PUMP_RPM_INDEX 7
275#define CPUB_PUMP_RPM_INDEX 8
276#define CPU_PUMP_OUTPUT_MAX 3200
277#define CPU_PUMP_OUTPUT_MIN 1250
278
279/* Xserve */
280#define CPU_A1_FAN_RPM_INDEX 9
281#define CPU_A2_FAN_RPM_INDEX 10
282#define CPU_A3_FAN_RPM_INDEX 11
283#define CPU_B1_FAN_RPM_INDEX 12
284#define CPU_B2_FAN_RPM_INDEX 13
285#define CPU_B3_FAN_RPM_INDEX 14
286
287
288struct cpu_pid_state
289{
290 int index;
291 struct i2c_client * monitor;
292 struct mpu_data mpu;
293 int overtemp;
294 s32 temp_history[CPU_TEMP_HISTORY_SIZE];
295 int cur_temp;
296 s32 power_history[CPU_POWER_HISTORY_SIZE];
297 s32 error_history[CPU_POWER_HISTORY_SIZE];
298 int cur_power;
299 int count_power;
300 int rpm;
301 int intake_rpm;
302 s32 voltage;
303 s32 current_a;
304 s32 last_temp;
305 s32 last_power;
306 int first;
307 u8 adc_config;
308 s32 pump_min;
309 s32 pump_max;
310};
311
312/* Tickle FCU every 10 seconds */
313#define FCU_TICKLE_TICKS 10
314
315/*
316 * Driver state
317 */
318enum {
319 state_detached,
320 state_attaching,
321 state_attached,
322 state_detaching,
323};
324
325
326#endif /* __THERM_PMAC_7_2_H__ */
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