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Expand PMF_FN_* macros.
[netbsd-mini2440.git] / sys / dev / isa / itesio_isa.c
blob69f5f1bc5e0e13d4b97f207b619a7f2c41ef7230
1 /* $NetBSD: itesio_isa.c,v 1.16 2008/04/26 12:59:24 xtraeme Exp $ */
2 /* Derived from $OpenBSD: it.c,v 1.19 2006/04/10 00:57:54 deraadt Exp $ */
3
4 /*
5 * Copyright (c) 2006-2007 Juan Romero Pardines <xtraeme@netbsd.org>
6 * Copyright (c) 2003 Julien Bordet <zejames@greyhats.org>
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITD TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITD TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 /*
31 * Driver for the iTE IT87xxF Super I/O. Currently supporting
32 * the Environmental Controller to monitor the sensors and the
33 * Watchdog Timer.
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: itesio_isa.c,v 1.16 2008/04/26 12:59:24 xtraeme Exp $");
38
39 #include <sys/param.h>
40 #include <sys/kernel.h>
41 #include <sys/device.h>
42
43 #include <sys/bus.h>
44
45 #include <dev/isa/isareg.h>
46 #include <dev/isa/isavar.h>
47
48 #include <dev/sysmon/sysmonvar.h>
49
50 #include <dev/isa/itesio_isavar.h>
51
52 #define IT_VOLTSTART_IDX 3 /* voltage start index */
53 #define IT_FANSTART_IDX 12 /* fan start index */
54
55 #if defined(ITESIO_DEBUG)
56 #define DPRINTF(x) do { printf x; } while (0)
57 #else
58 #define DPRINTF(x)
59 #endif
60
61 /*
62 * IT87-compatible chips can typically measure voltages up to 4.096 V.
63 * To measure higher voltages the input is attenuated with (external)
64 * resistors. Negative voltages are measured using a reference
65 * voltage. So we have to convert the sensor values back to real
66 * voltages by applying the appropriate resistor factor.
67 */
68 #define RFACT_NONE 10000
69 #define RFACT(x, y) (RFACT_NONE * ((x) + (y)) / (y))
70
71 /* autoconf(9) functions */
72 static int itesio_isa_match(device_t, cfdata_t, void *);
73 static void itesio_isa_attach(device_t, device_t, void *);
74 static int itesio_isa_detach(device_t, int);
75
76 CFATTACH_DECL_NEW(itesio, sizeof(struct itesio_softc),
77 itesio_isa_match, itesio_isa_attach, itesio_isa_detach, NULL);
78
79 /* driver functions */
80 static uint8_t itesio_ecreadreg(struct itesio_softc *, int);
81 static void itesio_ecwritereg(struct itesio_softc *, int, int);
82 static uint8_t itesio_readreg(bus_space_tag_t, bus_space_handle_t, int);
83 static void itesio_writereg(bus_space_tag_t, bus_space_handle_t, int, int);
84 static void itesio_enter(bus_space_tag_t, bus_space_handle_t);
85 static void itesio_exit(bus_space_tag_t, bus_space_handle_t);
86
87 /* sysmon_envsys(9) glue */
88 static void itesio_setup_sensors(struct itesio_softc *);
89 static void itesio_refresh_temp(struct itesio_softc *, envsys_data_t *);
90 static void itesio_refresh_volts(struct itesio_softc *, envsys_data_t *);
91 static void itesio_refresh_fans(struct itesio_softc *, envsys_data_t *);
92 static void itesio_refresh(struct sysmon_envsys *, envsys_data_t *);
93
94 /* sysmon_wdog glue */
95 static int itesio_wdt_setmode(struct sysmon_wdog *);
96 static int itesio_wdt_tickle(struct sysmon_wdog *);
97
98 /* rfact values for voltage sensors */
99 static const int itesio_vrfact[] = {
100 RFACT_NONE, /* VCORE_A */
101 RFACT_NONE, /* VCORE_B */
102 RFACT_NONE, /* +3.3V */
103 RFACT(68, 100), /* +5V */
104 RFACT(30, 10), /* +12V */
105 RFACT(21, 10), /* -5V */
106 RFACT(83, 20), /* -12V */
107 RFACT(68, 100), /* STANDBY */
108 RFACT_NONE /* VBAT */
109 };
110
111 static int
112 itesio_isa_match(device_t parent, cfdata_t match, void *aux)
113 {
114 struct isa_attach_args *ia = aux;
115 bus_space_handle_t ioh;
116 uint16_t cr;
117
118 /* Must supply an address */
119 if (ia->ia_nio < 1)
120 return 0;
121
122 if (ISA_DIRECT_CONFIG(ia))
123 return 0;
124
125 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
126 return 0;
127
128 if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 2, 0, &ioh))
129 return 0;
130
131 itesio_enter(ia->ia_iot, ioh);
132 cr = (itesio_readreg(ia->ia_iot, ioh, ITESIO_CHIPID1) << 8);
133 cr |= itesio_readreg(ia->ia_iot, ioh, ITESIO_CHIPID2);
134 itesio_exit(ia->ia_iot, ioh);
135 bus_space_unmap(ia->ia_iot, ioh, 2);
136
137 switch (cr) {
138 case ITESIO_ID8705:
139 case ITESIO_ID8712:
140 case ITESIO_ID8716:
141 case ITESIO_ID8718:
142 case ITESIO_ID8726:
143 ia->ia_nio = 1;
144 ia->ia_io[0].ir_size = 2;
145 ia->ia_niomem = 0;
146 ia->ia_nirq = 0;
147 ia->ia_ndrq = 0;
148 return 1;
149 default:
150 return 0;
151 }
152 }
153
154 static void
155 itesio_isa_attach(device_t parent, device_t self, void *aux)
156 {
157 struct itesio_softc *sc = device_private(self);
158 struct isa_attach_args *ia = aux;
159 int i;
160 uint8_t cr;
161
162 sc->sc_iot = ia->ia_iot;
163
164 if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, 2, 0,
165 &sc->sc_ioh)) {
166 aprint_error(": can't map i/o space\n");
167 return;
168 }
169
170 aprint_naive("\n");
171
172 /*
173 * Enter to the Super I/O MB PNP mode.
174 */
175 itesio_enter(sc->sc_iot, sc->sc_ioh);
176 /*
177 * Get info from the Super I/O Global Configuration Registers:
178 * Chip IDs and Device Revision.
179 */
180 sc->sc_chipid = (itesio_readreg(sc->sc_iot, sc->sc_ioh,
181 ITESIO_CHIPID1) << 8);
182 sc->sc_chipid |= itesio_readreg(sc->sc_iot, sc->sc_ioh,
183 ITESIO_CHIPID2);
184 sc->sc_devrev = (itesio_readreg(sc->sc_iot, sc->sc_ioh,
185 ITESIO_DEVREV) & 0x0f);
186 /*
187 * Select the EC LDN to get the Base Address.
188 */
189 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_LDNSEL, ITESIO_EC_LDN);
190 sc->sc_hwmon_baseaddr =
191 (itesio_readreg(sc->sc_iot, sc->sc_ioh, ITESIO_EC_MSB) << 8);
192 sc->sc_hwmon_baseaddr |= itesio_readreg(sc->sc_iot, sc->sc_ioh,
193 ITESIO_EC_LSB);
194 /*
195 * We are done, exit MB PNP mode.
196 */
197 itesio_exit(sc->sc_iot, sc->sc_ioh);
198
199 aprint_normal(": iTE IT%4xF Super I/O (rev %d)\n",
200 sc->sc_chipid, sc->sc_devrev);
201 aprint_normal_dev(self, "Hardware Monitor registers at 0x%x\n",
202 sc->sc_hwmon_baseaddr);
203
204 if (bus_space_map(sc->sc_ec_iot, sc->sc_hwmon_baseaddr, 8, 0,
205 &sc->sc_ec_ioh)) {
206 aprint_error_dev(self, "cannot map hwmon i/o space\n");
207 goto out2;
208 }
209
210 sc->sc_hwmon_mapped = true;
211
212 /* Activate monitoring */
213 cr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG);
214 SET(cr, 0x01);
215 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, cr);
216
217 #ifdef notyet
218 /* Enable beep alarms */
219 cr = itesio_ecreadreg(sc, ITESIO_EC_BEEPEER);
220 SET(cr, 0x02); /* Voltage exceeds limit */
221 SET(cr, 0x04); /* Temperature exceeds limit */
222 itesio_ecwritereg(sc, ITESIO_EC_BEEPEER, cr);
223 #endif
224
225 /*
226 * Initialize and attach sensors.
227 */
228 itesio_setup_sensors(sc);
229 sc->sc_sme = sysmon_envsys_create();
230 for (i = 0; i < IT_NUM_SENSORS; i++) {
231 if (sysmon_envsys_sensor_attach(sc->sc_sme,
232 &sc->sc_sensor[i])) {
233 sysmon_envsys_destroy(sc->sc_sme);
234 goto out;
235 }
236 }
237 /*
238 * Hook into the system monitor.
239 */
240 sc->sc_sme->sme_name = device_xname(self);
241 sc->sc_sme->sme_cookie = sc;
242 sc->sc_sme->sme_refresh = itesio_refresh;
243
244 if ((i = sysmon_envsys_register(sc->sc_sme))) {
245 aprint_error_dev(self,
246 "unable to register with sysmon (%d)\n", i);
247 sysmon_envsys_destroy(sc->sc_sme);
248 goto out;
249 }
250 sc->sc_hwmon_enabled = true;
251
252 if (!pmf_device_register(self, NULL, NULL))
253 aprint_error_dev(self, "couldn't establish power handler\n");
254
255 /* The IT8705 doesn't support the WDT */
256 if (sc->sc_chipid == ITESIO_ID8705)
257 goto out2;
258
259 /*
260 * Initialize the watchdog timer.
261 */
262 sc->sc_smw.smw_name = device_xname(self);
263 sc->sc_smw.smw_cookie = sc;
264 sc->sc_smw.smw_setmode = itesio_wdt_setmode;
265 sc->sc_smw.smw_tickle = itesio_wdt_tickle;
266 sc->sc_smw.smw_period = 60;
267
268 if (sysmon_wdog_register(&sc->sc_smw)) {
269 aprint_error_dev(self, "unable to register watchdog timer\n");
270 goto out2;
271 }
272 sc->sc_wdt_enabled = true;
273 aprint_normal_dev(self, "Watchdog Timer present\n");
274 return;
275
276 out:
277 bus_space_unmap(sc->sc_ec_iot, sc->sc_ec_ioh, 8);
278 out2:
279 bus_space_unmap(sc->sc_iot, sc->sc_ioh, 2);
280 }
281
282 static int
283 itesio_isa_detach(device_t self, int flags)
284 {
285 struct itesio_softc *sc = device_private(self);
286
287 if (sc->sc_hwmon_enabled)
288 sysmon_envsys_unregister(sc->sc_sme);
289 if (sc->sc_hwmon_mapped)
290 bus_space_unmap(sc->sc_ec_iot, sc->sc_ec_ioh, 8);
291 if (sc->sc_wdt_enabled) {
292 sysmon_wdog_unregister(&sc->sc_smw);
293 bus_space_unmap(sc->sc_iot, sc->sc_ioh, 2);
294 }
295
296 return 0;
297 }
298
299 /*
300 * Functions to read/write to the Environmental Controller.
301 */
302 static uint8_t
303 itesio_ecreadreg(struct itesio_softc *sc, int reg)
304 {
305 bus_space_write_1(sc->sc_ec_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg);
306 return bus_space_read_1(sc->sc_ec_iot, sc->sc_ec_ioh, ITESIO_EC_DATA);
307 }
308
309 static void
310 itesio_ecwritereg(struct itesio_softc *sc, int reg, int val)
311 {
312 bus_space_write_1(sc->sc_ec_iot, sc->sc_ec_ioh, ITESIO_EC_ADDR, reg);
313 bus_space_write_1(sc->sc_ec_iot, sc->sc_ec_ioh, ITESIO_EC_DATA, val);
314 }
315
316 /*
317 * Functions to enter/exit/read/write to the Super I/O.
318 */
319 static uint8_t
320 itesio_readreg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg)
321 {
322 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg);
323 return bus_space_read_1(iot, ioh, ITESIO_DATA);
324 }
325
326 static void
327 itesio_writereg(bus_space_tag_t iot, bus_space_handle_t ioh, int reg, int val)
328 {
329 bus_space_write_1(iot, ioh, ITESIO_ADDR, reg);
330 bus_space_write_1(iot, ioh, ITESIO_DATA, val);
331 }
332
333 static void
334 itesio_enter(bus_space_tag_t iot, bus_space_handle_t ioh)
335 {
336 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x87);
337 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x01);
338 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55);
339 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x55);
340 }
341
342 static void
343 itesio_exit(bus_space_tag_t iot, bus_space_handle_t ioh)
344 {
345 bus_space_write_1(iot, ioh, ITESIO_ADDR, 0x02);
346 bus_space_write_1(iot, ioh, ITESIO_DATA, 0x02);
347 }
348
349
350 #define COPYDESCR(x, y) \
351 do { \
352 strlcpy((x), (y), sizeof(x)); \
353 } while (0)
354 /*
355 * sysmon_envsys(9) glue.
356 */
357 static void
358 itesio_setup_sensors(struct itesio_softc *sc)
359 {
360 int i;
361
362 /* temperatures */
363 for (i = 0; i < IT_VOLTSTART_IDX; i++)
364 sc->sc_sensor[i].units = ENVSYS_STEMP;
365
366 COPYDESCR(sc->sc_sensor[0].desc, "CPU Temp");
367 COPYDESCR(sc->sc_sensor[1].desc, "System Temp");
368 COPYDESCR(sc->sc_sensor[2].desc, "Aux Temp");
369
370 /* voltages */
371 for (i = IT_VOLTSTART_IDX; i < IT_FANSTART_IDX; i++) {
372 sc->sc_sensor[i].units = ENVSYS_SVOLTS_DC;
373 sc->sc_sensor[i].flags = ENVSYS_FCHANGERFACT;
374 }
375
376 COPYDESCR(sc->sc_sensor[3].desc, "VCORE_A");
377 COPYDESCR(sc->sc_sensor[4].desc, "VCORE_B");
378 COPYDESCR(sc->sc_sensor[5].desc, "+3.3V");
379 COPYDESCR(sc->sc_sensor[6].desc, "+5V");
380 COPYDESCR(sc->sc_sensor[7].desc, "+12V");
381 COPYDESCR(sc->sc_sensor[8].desc, "-5V");
382 COPYDESCR(sc->sc_sensor[9].desc, "-12V");
383 COPYDESCR(sc->sc_sensor[10].desc, "STANDBY");
384 COPYDESCR(sc->sc_sensor[11].desc, "VBAT");
385
386 /* fans */
387 for (i = IT_FANSTART_IDX; i < IT_NUM_SENSORS; i++)
388 sc->sc_sensor[i].units = ENVSYS_SFANRPM;
389
390 COPYDESCR(sc->sc_sensor[12].desc, "CPU Fan");
391 COPYDESCR(sc->sc_sensor[13].desc, "System Fan");
392 COPYDESCR(sc->sc_sensor[14].desc, "Aux Fan");
393 }
394 #undef COPYDESCR
395
396 static void
397 itesio_refresh_temp(struct itesio_softc *sc, envsys_data_t *edata)
398 {
399 int sdata;
400
401 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORTEMPBASE + edata->sensor);
402 /* sensor is not connected or reporting invalid data */
403 if (sdata == 0 || sdata >= 0xfa) {
404 edata->state = ENVSYS_SINVALID;
405 return;
406 }
407
408 DPRINTF(("%s: sdata[temp%d] 0x%x\n", __func__, edata->sensor, sdata));
409 /* Convert temperature to uK */
410 edata->value_cur = sdata * 1000000 + 273150000;
411 edata->state = ENVSYS_SVALID;
412 }
413
414 static void
415 itesio_refresh_volts(struct itesio_softc *sc, envsys_data_t *edata)
416 {
417 uint8_t vbatcr = 0;
418 int i, sdata;
419
420 i = edata->sensor - IT_VOLTSTART_IDX;
421
422 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORVOLTBASE + i);
423 /* not connected */
424 if (sdata == 0 || sdata == 0xff) {
425 edata->state = ENVSYS_SINVALID;
426 return;
427 }
428
429 /*
430 * update VBAT voltage reading every time we read it, to get
431 * latest value.
432 */
433 if (i == 8) {
434 vbatcr = itesio_ecreadreg(sc, ITESIO_EC_CONFIG);
435 SET(vbatcr, ITESIO_EC_UPDATEVBAT);
436 itesio_ecwritereg(sc, ITESIO_EC_CONFIG, vbatcr);
437 }
438
439 DPRINTF(("%s: sdata[volt%d] 0x%x\n", __func__, i, sdata));
440
441 /* voltage returned as (mV << 4) */
442 edata->value_cur = (sdata << 4);
443 /* negative values */
444 if (i == 5 || i == 6)
445 edata->value_cur -= ITESIO_EC_VREF;
446 /* rfact is (factor * 10^4) */
447 edata->value_cur *= itesio_vrfact[i];
448 if (edata->rfact)
449 edata->value_cur += edata->rfact;
450 /* division by 10 gets us back to uVDC */
451 edata->value_cur /= 10;
452 if (i == 5 || i == 6)
453 edata->value_cur += ITESIO_EC_VREF * 1000;
454
455 edata->state = ENVSYS_SVALID;
456 }
457
458 static void
459 itesio_refresh_fans(struct itesio_softc *sc, envsys_data_t *edata)
460 {
461 uint8_t mode = 0;
462 uint16_t sdata = 0;
463 int i, divisor, odivisor, ndivisor;
464
465 i = edata->sensor - IT_FANSTART_IDX;
466 divisor = odivisor = ndivisor = 0;
467
468 if (sc->sc_chipid == ITESIO_ID8705 || sc->sc_chipid == ITESIO_ID8712) {
469 /*
470 * Use the Fan Tachometer Divisor Register for
471 * IT8705F and IT8712F.
472 */
473 divisor = odivisor = ndivisor =
474 itesio_ecreadreg(sc, ITESIO_EC_FAN_TDR);
475 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i);
476 if (sdata == 0xff) {
477 edata->state = ENVSYS_SINVALID;
478 if (i == 2)
479 ndivisor |= 0x40;
480 else {
481 ndivisor &= ~(7 << (i * 3));
482 ndivisor |= ((divisor + 1) & 7) << (i * 3);
483 }
484 } else {
485 if (i == 2)
486 divisor = divisor & 1 ? 3 : 1;
487
488 if ((sdata << (divisor & 7)) == 0)
489 edata->state = ENVSYS_SINVALID;
490 else {
491 edata->value_cur =
492 1350000 / (sdata << (divisor & 7));
493 edata->state = ENVSYS_SVALID;
494 }
495 }
496 DPRINTF(("%s: 8bit sdata[fan%d] 0x%x div: 0x%x\n", __func__,
497 i, sdata, divisor));
498 if (ndivisor != odivisor)
499 itesio_ecwritereg(sc, ITESIO_EC_FAN_TDR, ndivisor);
500 } else {
501 mode = itesio_ecreadreg(sc, ITESIO_EC_FAN16_CER);
502 sdata = itesio_ecreadreg(sc, ITESIO_EC_SENSORFANBASE + i);
503 if (mode & (1 << i))
504 sdata += (itesio_ecreadreg(sc,
505 ITESIO_EC_SENSORFANEXTBASE + i) << 8);
506 edata->state = ENVSYS_SVALID;
507 if (sdata == 0 ||
508 sdata == ((mode & (1 << i)) ? 0xffff : 0xff))
509 edata->state = ENVSYS_SINVALID;
510 else {
511 edata->value_cur = 1350000 / 2 / sdata;
512 edata->state = ENVSYS_SVALID;
513 }
514 DPRINTF(("%s: 16bit sdata[fan%d] 0x%x\n", __func__, i, sdata));
515 }
516 }
517
518 static void
519 itesio_refresh(struct sysmon_envsys *sme, struct envsys_data *edata)
520 {
521 struct itesio_softc *sc = sme->sme_cookie;
522
523 if (edata->sensor < IT_VOLTSTART_IDX)
524 itesio_refresh_temp(sc, edata);
525 else if (edata->sensor >= IT_VOLTSTART_IDX &&
526 edata->sensor < IT_FANSTART_IDX)
527 itesio_refresh_volts(sc, edata);
528 else
529 itesio_refresh_fans(sc, edata);
530 }
531
532 static int
533 itesio_wdt_setmode(struct sysmon_wdog *smw)
534 {
535 struct itesio_softc *sc = smw->smw_cookie;
536 int period = smw->smw_period;
537
538 /* Enter MB PNP mode and select the WDT LDN */
539 itesio_enter(sc->sc_iot, sc->sc_ioh);
540 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_LDNSEL, ITESIO_WDT_LDN);
541
542 if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) {
543 /* Disable the watchdog */
544 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_CTL, 0);
545 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_CNF, 0);
546 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_MSB, 0);
547 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_LSB, 0);
548 } else {
549 /* Enable the watchdog */
550 if (period > ITESIO_WDT_MAXTIMO || period < 1)
551 period = smw->smw_period = ITESIO_WDT_MAXTIMO;
552
553 period *= 2;
554
555 /* set the timeout and start the watchdog */
556 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_MSB,
557 period >> 8);
558 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_LSB,
559 period & 0xff);
560 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_CNF,
561 ITESIO_WDT_CNF_SECS | ITESIO_WDT_CNF_KRST |
562 ITESIO_WDT_CNF_PWROK);
563 }
564 /* we are done, exit MB PNP mode */
565 itesio_exit(sc->sc_iot, sc->sc_ioh);
566
567 return 0;
568 }
569
570 static int
571 itesio_wdt_tickle(struct sysmon_wdog *smw)
572 {
573 struct itesio_softc *sc = smw->smw_cookie;
574 int period = smw->smw_period * 2;
575
576 /* refresh timeout value and exit */
577 itesio_enter(sc->sc_iot, sc->sc_ioh);
578 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_LDNSEL, ITESIO_WDT_LDN);
579 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_MSB,
580 period >> 8);
581 itesio_writereg(sc->sc_iot, sc->sc_ioh, ITESIO_WDT_TMO_LSB,
582 period & 0xff);
583 itesio_exit(sc->sc_iot, sc->sc_ioh);
584
585 return 0;
586 }
NetBSD on the FriendlyARM MINI2440