FreeBSD/Linux Kernel Cross Reference
sys/isa/ppc.c
1 /*-
2 * Copyright (c) 2001 Alcove - Nicolas Souchu
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 *
28 */
29
30 #include "opt_ppc.h"
31
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/bus.h>
36 #include <sys/malloc.h>
37
38 #include <vm/vm.h>
39 #include <vm/pmap.h>
40 #include <machine/clock.h>
41 #include <machine/bus.h>
42 #include <machine/resource.h>
43 #include <machine/vmparam.h>
44 #include <sys/rman.h>
45
46 #include <isa/isareg.h>
47 #include <isa/isavar.h>
48
49 #include <dev/ppbus/ppbconf.h>
50 #include <dev/ppbus/ppb_msq.h>
51
52 #include <isa/ppcreg.h>
53
54 #include "ppbus_if.h"
55
56 #define LOG_PPC(function, ppc, string) \
57 if (bootverbose) printf("%s: %s\n", function, string)
58
59
60 #define DEVTOSOFTC(dev) ((struct ppc_data *)device_get_softc(dev))
61
62 devclass_t ppc_devclass;
63
64 static int ppc_probe(device_t dev);
65 static int ppc_attach(device_t dev);
66 static int ppc_read_ivar(device_t bus, device_t dev, int index, uintptr_t *val);
67
68 static void ppc_reset_epp(device_t);
69 static void ppc_ecp_sync(device_t);
70 static void ppcintr(void *arg);
71
72 static int ppc_exec_microseq(device_t, struct ppb_microseq **);
73 static int ppc_setmode(device_t, int);
74
75 static int ppc_read(device_t, char *, int, int);
76 static int ppc_write(device_t, char *, int, int);
77
78 static u_char ppc_io(device_t, int, u_char *, int, u_char);
79
80 static int ppc_setup_intr(device_t, device_t, struct resource *, int,
81 void (*)(void *), void *, void **);
82 static int ppc_teardown_intr(device_t, device_t, struct resource *, void *);
83
84 static device_method_t ppc_methods[] = {
85 /* device interface */
86 DEVMETHOD(device_probe, ppc_probe),
87 DEVMETHOD(device_attach, ppc_attach),
88
89 /* bus interface */
90 DEVMETHOD(bus_read_ivar, ppc_read_ivar),
91 DEVMETHOD(bus_setup_intr, ppc_setup_intr),
92 DEVMETHOD(bus_teardown_intr, ppc_teardown_intr),
93 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
94
95 /* ppbus interface */
96 DEVMETHOD(ppbus_io, ppc_io),
97 DEVMETHOD(ppbus_exec_microseq, ppc_exec_microseq),
98 DEVMETHOD(ppbus_reset_epp, ppc_reset_epp),
99 DEVMETHOD(ppbus_setmode, ppc_setmode),
100 DEVMETHOD(ppbus_ecp_sync, ppc_ecp_sync),
101 DEVMETHOD(ppbus_read, ppc_read),
102 DEVMETHOD(ppbus_write, ppc_write),
103
104 { 0, 0 }
105 };
106
107 static driver_t ppc_driver = {
108 "ppc",
109 ppc_methods,
110 sizeof(struct ppc_data),
111 };
112
113 static char *ppc_models[] = {
114 "SMC-like", "SMC FDC37C665GT", "SMC FDC37C666GT", "PC87332", "PC87306",
115 "82091AA", "Generic", "W83877F", "W83877AF", "Winbond", "PC87334",
116 "SMC FDC37C935", "PC87303", 0
117 };
118
119 /* list of available modes */
120 static char *ppc_avms[] = {
121 "COMPATIBLE", "NIBBLE-only", "PS2-only", "PS2/NIBBLE", "EPP-only",
122 "EPP/NIBBLE", "EPP/PS2", "EPP/PS2/NIBBLE", "ECP-only",
123 "ECP/NIBBLE", "ECP/PS2", "ECP/PS2/NIBBLE", "ECP/EPP",
124 "ECP/EPP/NIBBLE", "ECP/EPP/PS2", "ECP/EPP/PS2/NIBBLE", 0
125 };
126
127 /* list of current executing modes
128 * Note that few modes do not actually exist.
129 */
130 static char *ppc_modes[] = {
131 "COMPATIBLE", "NIBBLE", "PS/2", "PS/2", "EPP",
132 "EPP", "EPP", "EPP", "ECP",
133 "ECP", "ECP+PS2", "ECP+PS2", "ECP+EPP",
134 "ECP+EPP", "ECP+EPP", "ECP+EPP", 0
135 };
136
137 static char *ppc_epp_protocol[] = { " (EPP 1.9)", " (EPP 1.7)", 0 };
138
139 #ifdef __i386__
140 /*
141 * BIOS printer list - used by BIOS probe.
142 */
143 #define BIOS_PPC_PORTS 0x408
144 #define BIOS_PORTS (short *)(KERNBASE+BIOS_PPC_PORTS)
145 #define BIOS_MAX_PPC 4
146 #endif
147
148 /*
149 * ppc_ecp_sync() XXX
150 */
151 static void
152 ppc_ecp_sync(device_t dev) {
153
154 int i, r;
155 struct ppc_data *ppc = DEVTOSOFTC(dev);
156
157 if (!(ppc->ppc_avm & PPB_ECP) && !(ppc->ppc_dtm & PPB_ECP))
158 return;
159
160 r = r_ecr(ppc);
161 if ((r & 0xe0) != PPC_ECR_EPP)
162 return;
163
164 for (i = 0; i < 100; i++) {
165 r = r_ecr(ppc);
166 if (r & 0x1)
167 return;
168 DELAY(100);
169 }
170
171 printf("ppc%d: ECP sync failed as data still " \
172 "present in FIFO.\n", ppc->ppc_unit);
173
174 return;
175 }
176
177 /*
178 * ppc_detect_fifo()
179 *
180 * Detect parallel port FIFO
181 */
182 static int
183 ppc_detect_fifo(struct ppc_data *ppc)
184 {
185 char ecr_sav;
186 char ctr_sav, ctr, cc;
187 short i;
188
189 /* save registers */
190 ecr_sav = r_ecr(ppc);
191 ctr_sav = r_ctr(ppc);
192
193 /* enter ECP configuration mode, no interrupt, no DMA */
194 w_ecr(ppc, 0xf4);
195
196 /* read PWord size - transfers in FIFO mode must be PWord aligned */
197 ppc->ppc_pword = (r_cnfgA(ppc) & PPC_PWORD_MASK);
198
199 /* XXX 16 and 32 bits implementations not supported */
200 if (ppc->ppc_pword != PPC_PWORD_8) {
201 LOG_PPC(__FUNCTION__, ppc, "PWord not supported");
202 goto error;
203 }
204
205 w_ecr(ppc, 0x34); /* byte mode, no interrupt, no DMA */
206 ctr = r_ctr(ppc);
207 w_ctr(ppc, ctr | PCD); /* set direction to 1 */
208
209 /* enter ECP test mode, no interrupt, no DMA */
210 w_ecr(ppc, 0xd4);
211
212 /* flush the FIFO */
213 for (i=0; i<1024; i++) {
214 if (r_ecr(ppc) & PPC_FIFO_EMPTY)
215 break;
216 cc = r_fifo(ppc);
217 }
218
219 if (i >= 1024) {
220 LOG_PPC(__FUNCTION__, ppc, "can't flush FIFO");
221 goto error;
222 }
223
224 /* enable interrupts, no DMA */
225 w_ecr(ppc, 0xd0);
226
227 /* determine readIntrThreshold
228 * fill the FIFO until serviceIntr is set
229 */
230 for (i=0; i<1024; i++) {
231 w_fifo(ppc, (char)i);
232 if (!ppc->ppc_rthr && (r_ecr(ppc) & PPC_SERVICE_INTR)) {
233 /* readThreshold reached */
234 ppc->ppc_rthr = i+1;
235 }
236 if (r_ecr(ppc) & PPC_FIFO_FULL) {
237 ppc->ppc_fifo = i+1;
238 break;
239 }
240 }
241
242 if (i >= 1024) {
243 LOG_PPC(__FUNCTION__, ppc, "can't fill FIFO");
244 goto error;
245 }
246
247 w_ecr(ppc, 0xd4); /* test mode, no interrupt, no DMA */
248 w_ctr(ppc, ctr & ~PCD); /* set direction to 0 */
249 w_ecr(ppc, 0xd0); /* enable interrupts */
250
251 /* determine writeIntrThreshold
252 * empty the FIFO until serviceIntr is set
253 */
254 for (i=ppc->ppc_fifo; i>0; i--) {
255 if (r_fifo(ppc) != (char)(ppc->ppc_fifo-i)) {
256 LOG_PPC(__FUNCTION__, ppc, "invalid data in FIFO");
257 goto error;
258 }
259 if (r_ecr(ppc) & PPC_SERVICE_INTR) {
260 /* writeIntrThreshold reached */
261 ppc->ppc_wthr = ppc->ppc_fifo - i+1;
262 }
263 /* if FIFO empty before the last byte, error */
264 if (i>1 && (r_ecr(ppc) & PPC_FIFO_EMPTY)) {
265 LOG_PPC(__FUNCTION__, ppc, "data lost in FIFO");
266 goto error;
267 }
268 }
269
270 /* FIFO must be empty after the last byte */
271 if (!(r_ecr(ppc) & PPC_FIFO_EMPTY)) {
272 LOG_PPC(__FUNCTION__, ppc, "can't empty the FIFO");
273 goto error;
274 }
275
276 w_ctr(ppc, ctr_sav);
277 w_ecr(ppc, ecr_sav);
278
279 return (0);
280
281 error:
282 w_ctr(ppc, ctr_sav);
283 w_ecr(ppc, ecr_sav);
284
285 return (EINVAL);
286 }
287
288 static int
289 ppc_detect_port(struct ppc_data *ppc)
290 {
291
292 w_ctr(ppc, 0x0c); /* To avoid missing PS2 ports */
293 w_dtr(ppc, 0xaa);
294 if (r_dtr(ppc) != 0xaa)
295 return (0);
296
297 return (1);
298 }
299
300 /*
301 * EPP timeout, according to the PC87332 manual
302 * Semantics of clearing EPP timeout bit.
303 * PC87332 - reading SPP_STR does it...
304 * SMC - write 1 to EPP timeout bit XXX
305 * Others - (?) write 0 to EPP timeout bit
306 */
307 static void
308 ppc_reset_epp_timeout(struct ppc_data *ppc)
309 {
310 register char r;
311
312 r = r_str(ppc);
313 w_str(ppc, r | 0x1);
314 w_str(ppc, r & 0xfe);
315
316 return;
317 }
318
319 static int
320 ppc_check_epp_timeout(struct ppc_data *ppc)
321 {
322 ppc_reset_epp_timeout(ppc);
323
324 return (!(r_str(ppc) & TIMEOUT));
325 }
326
327 /*
328 * Configure current operating mode
329 */
330 static int
331 ppc_generic_setmode(struct ppc_data *ppc, int mode)
332 {
333 u_char ecr = 0;
334
335 /* check if mode is available */
336 if (mode && !(ppc->ppc_avm & mode))
337 return (EINVAL);
338
339 /* if ECP mode, configure ecr register */
340 if ((ppc->ppc_avm & PPB_ECP) || (ppc->ppc_dtm & PPB_ECP)) {
341 /* return to byte mode (keeping direction bit),
342 * no interrupt, no DMA to be able to change to
343 * ECP
344 */
345 w_ecr(ppc, PPC_ECR_RESET);
346 ecr = PPC_DISABLE_INTR;
347
348 if (mode & PPB_EPP)
349 return (EINVAL);
350 else if (mode & PPB_ECP)
351 /* select ECP mode */
352 ecr |= PPC_ECR_ECP;
353 else if (mode & PPB_PS2)
354 /* select PS2 mode with ECP */
355 ecr |= PPC_ECR_PS2;
356 else
357 /* select COMPATIBLE/NIBBLE mode */
358 ecr |= PPC_ECR_STD;
359
360 w_ecr(ppc, ecr);
361 }
362
363 ppc->ppc_mode = mode;
364
365 return (0);
366 }
367
368 /*
369 * The ppc driver is free to choose options like FIFO or DMA
370 * if ECP mode is available.
371 *
372 * The 'RAW' option allows the upper drivers to force the ppc mode
373 * even with FIFO, DMA available.
374 */
375 static int
376 ppc_smclike_setmode(struct ppc_data *ppc, int mode)
377 {
378 u_char ecr = 0;
379
380 /* check if mode is available */
381 if (mode && !(ppc->ppc_avm & mode))
382 return (EINVAL);
383
384 /* if ECP mode, configure ecr register */
385 if ((ppc->ppc_avm & PPB_ECP) || (ppc->ppc_dtm & PPB_ECP)) {
386 /* return to byte mode (keeping direction bit),
387 * no interrupt, no DMA to be able to change to
388 * ECP or EPP mode
389 */
390 w_ecr(ppc, PPC_ECR_RESET);
391 ecr = PPC_DISABLE_INTR;
392
393 if (mode & PPB_EPP)
394 /* select EPP mode */
395 ecr |= PPC_ECR_EPP;
396 else if (mode & PPB_ECP)
397 /* select ECP mode */
398 ecr |= PPC_ECR_ECP;
399 else if (mode & PPB_PS2)
400 /* select PS2 mode with ECP */
401 ecr |= PPC_ECR_PS2;
402 else
403 /* select COMPATIBLE/NIBBLE mode */
404 ecr |= PPC_ECR_STD;
405
406 w_ecr(ppc, ecr);
407 }
408
409 ppc->ppc_mode = mode;
410
411 return (0);
412 }
413
414 #ifdef PPC_PROBE_CHIPSET
415 /*
416 * ppc_pc873xx_detect
417 *
418 * Probe for a Natsemi PC873xx-family part.
419 *
420 * References in this function are to the National Semiconductor
421 * PC87332 datasheet TL/C/11930, May 1995 revision.
422 */
423 static int pc873xx_basetab[] = {0x0398, 0x026e, 0x015c, 0x002e, 0};
424 static int pc873xx_porttab[] = {0x0378, 0x03bc, 0x0278, 0};
425 static int pc873xx_irqtab[] = {5, 7, 5, 0};
426
427 static int pc873xx_regstab[] = {
428 PC873_FER, PC873_FAR, PC873_PTR,
429 PC873_FCR, PC873_PCR, PC873_PMC,
430 PC873_TUP, PC873_SID, PC873_PNP0,
431 PC873_PNP1, PC873_LPTBA, -1
432 };
433
434 static char *pc873xx_rnametab[] = {
435 "FER", "FAR", "PTR", "FCR", "PCR",
436 "PMC", "TUP", "SID", "PNP0", "PNP1",
437 "LPTBA", NULL
438 };
439
440 static int
441 ppc_pc873xx_detect(struct ppc_data *ppc, int chipset_mode) /* XXX mode never forced */
442 {
443 static int index = 0;
444 int idport, irq;
445 int ptr, pcr, val, i;
446
447 while ((idport = pc873xx_basetab[index++])) {
448
449 /* XXX should check first to see if this location is already claimed */
450
451 /*
452 * Pull the 873xx through the power-on ID cycle (2.2,1.).
453 * We can't use this to locate the chip as it may already have
454 * been used by the BIOS.
455 */
456 (void)inb(idport); (void)inb(idport);
457 (void)inb(idport); (void)inb(idport);
458
459 /*
460 * Read the SID byte. Possible values are :
461 *
462 * 01010xxx PC87334
463 * 0001xxxx PC87332
464 * 01110xxx PC87306
465 * 00110xxx PC87303
466 */
467 outb(idport, PC873_SID);
468 val = inb(idport + 1);
469 if ((val & 0xf0) == 0x10) {
470 ppc->ppc_model = NS_PC87332;
471 } else if ((val & 0xf8) == 0x70) {
472 ppc->ppc_model = NS_PC87306;
473 } else if ((val & 0xf8) == 0x50) {
474 ppc->ppc_model = NS_PC87334;
475 } else if ((val & 0xf8) == 0x40) { /* Should be 0x30 by the
476 documentation, but probing
477 yielded 0x40... */
478 ppc->ppc_model = NS_PC87303;
479 } else {
480 if (bootverbose && (val != 0xff))
481 printf("PC873xx probe at 0x%x got unknown ID 0x%x\n", idport, val);
482 continue ; /* not recognised */
483 }
484
485 /* print registers */
486 if (bootverbose) {
487 printf("PC873xx");
488 for (i=0; pc873xx_regstab[i] != -1; i++) {
489 outb(idport, pc873xx_regstab[i]);
490 printf(" %s=0x%x", pc873xx_rnametab[i],
491 inb(idport + 1) & 0xff);
492 }
493 printf("\n");
494 }
495
496 /*
497 * We think we have one. Is it enabled and where we want it to be?
498 */
499 outb(idport, PC873_FER);
500 val = inb(idport + 1);
501 if (!(val & PC873_PPENABLE)) {
502 if (bootverbose)
503 printf("PC873xx parallel port disabled\n");
504 continue;
505 }
506 outb(idport, PC873_FAR);
507 val = inb(idport + 1);
508 /* XXX we should create a driver instance for every port found */
509 if (pc873xx_porttab[val & 0x3] != ppc->ppc_base) {
510
511 /* First try to change the port address to that requested... */
512
513 switch(ppc->ppc_base) {
514 case 0x378:
515 val &= 0xfc;
516 break;
517
518 case 0x3bc:
519 val &= 0xfd;
520 break;
521
522 case 0x278:
523 val &= 0xfe;
524 break;
525
526 default:
527 val &= 0xfd;
528 break;
529 }
530
531 outb(idport, PC873_FAR);
532 outb(idport + 1, val);
533 outb(idport + 1, val);
534
535 /* Check for success by reading back the value we supposedly
536 wrote and comparing...*/
537
538 outb(idport, PC873_FAR);
539 val = inb(idport + 1) & 0x3;
540
541 /* If we fail, report the failure... */
542
543 if (pc873xx_porttab[val] != ppc->ppc_base) {
544 if (bootverbose)
545 printf("PC873xx at 0x%x not for driver at port 0x%x\n",
546 pc873xx_porttab[val], ppc->ppc_base);
547 }
548 continue;
549 }
550
551 outb(idport, PC873_PTR);
552 ptr = inb(idport + 1);
553
554 /* get irq settings */
555 if (ppc->ppc_base == 0x378)
556 irq = (ptr & PC873_LPTBIRQ7) ? 7 : 5;
557 else
558 irq = pc873xx_irqtab[val];
559
560 if (bootverbose)
561 printf("PC873xx irq %d at 0x%x\n", irq, ppc->ppc_base);
562
563 /*
564 * Check if irq settings are correct
565 */
566 if (irq != ppc->ppc_irq) {
567 /*
568 * If the chipset is not locked and base address is 0x378,
569 * we have another chance
570 */
571 if (ppc->ppc_base == 0x378 && !(ptr & PC873_CFGLOCK)) {
572 if (ppc->ppc_irq == 7) {
573 outb(idport + 1, (ptr | PC873_LPTBIRQ7));
574 outb(idport + 1, (ptr | PC873_LPTBIRQ7));
575 } else {
576 outb(idport + 1, (ptr & ~PC873_LPTBIRQ7));
577 outb(idport + 1, (ptr & ~PC873_LPTBIRQ7));
578 }
579 if (bootverbose)
580 printf("PC873xx irq set to %d\n", ppc->ppc_irq);
581 } else {
582 if (bootverbose)
583 printf("PC873xx sorry, can't change irq setting\n");
584 }
585 } else {
586 if (bootverbose)
587 printf("PC873xx irq settings are correct\n");
588 }
589
590 outb(idport, PC873_PCR);
591 pcr = inb(idport + 1);
592
593 if ((ptr & PC873_CFGLOCK) || !chipset_mode) {
594 if (bootverbose)
595 printf("PC873xx %s", (ptr & PC873_CFGLOCK)?"locked":"unlocked");
596
597 ppc->ppc_avm |= PPB_NIBBLE;
598 if (bootverbose)
599 printf(", NIBBLE");
600
601 if (pcr & PC873_EPPEN) {
602 ppc->ppc_avm |= PPB_EPP;
603
604 if (bootverbose)
605 printf(", EPP");
606
607 if (pcr & PC873_EPP19)
608 ppc->ppc_epp = EPP_1_9;
609 else
610 ppc->ppc_epp = EPP_1_7;
611
612 if ((ppc->ppc_model == NS_PC87332) && bootverbose) {
613 outb(idport, PC873_PTR);
614 ptr = inb(idport + 1);
615 if (ptr & PC873_EPPRDIR)
616 printf(", Regular mode");
617 else
618 printf(", Automatic mode");
619 }
620 } else if (pcr & PC873_ECPEN) {
621 ppc->ppc_avm |= PPB_ECP;
622 if (bootverbose)
623 printf(", ECP");
624
625 if (pcr & PC873_ECPCLK) { /* XXX */
626 ppc->ppc_avm |= PPB_PS2;
627 if (bootverbose)
628 printf(", PS/2");
629 }
630 } else {
631 outb(idport, PC873_PTR);
632 ptr = inb(idport + 1);
633 if (ptr & PC873_EXTENDED) {
634 ppc->ppc_avm |= PPB_SPP;
635 if (bootverbose)
636 printf(", SPP");
637 }
638 }
639 } else {
640 if (bootverbose)
641 printf("PC873xx unlocked");
642
643 if (chipset_mode & PPB_ECP) {
644 if ((chipset_mode & PPB_EPP) && bootverbose)
645 printf(", ECP+EPP not supported");
646
647 pcr &= ~PC873_EPPEN;
648 pcr |= (PC873_ECPEN | PC873_ECPCLK); /* XXX */
649 outb(idport + 1, pcr);
650 outb(idport + 1, pcr);
651
652 if (bootverbose)
653 printf(", ECP");
654
655 } else if (chipset_mode & PPB_EPP) {
656 pcr &= ~(PC873_ECPEN | PC873_ECPCLK);
657 pcr |= (PC873_EPPEN | PC873_EPP19);
658 outb(idport + 1, pcr);
659 outb(idport + 1, pcr);
660
661 ppc->ppc_epp = EPP_1_9; /* XXX */
662
663 if (bootverbose)
664 printf(", EPP1.9");
665
666 /* enable automatic direction turnover */
667 if (ppc->ppc_model == NS_PC87332) {
668 outb(idport, PC873_PTR);
669 ptr = inb(idport + 1);
670 ptr &= ~PC873_EPPRDIR;
671 outb(idport + 1, ptr);
672 outb(idport + 1, ptr);
673
674 if (bootverbose)
675 printf(", Automatic mode");
676 }
677 } else {
678 pcr &= ~(PC873_ECPEN | PC873_ECPCLK | PC873_EPPEN);
679 outb(idport + 1, pcr);
680 outb(idport + 1, pcr);
681
682 /* configure extended bit in PTR */
683 outb(idport, PC873_PTR);
684 ptr = inb(idport + 1);
685
686 if (chipset_mode & PPB_PS2) {
687 ptr |= PC873_EXTENDED;
688
689 if (bootverbose)
690 printf(", PS/2");
691
692 } else {
693 /* default to NIBBLE mode */
694 ptr &= ~PC873_EXTENDED;
695
696 if (bootverbose)
697 printf(", NIBBLE");
698 }
699 outb(idport + 1, ptr);
700 outb(idport + 1, ptr);
701 }
702
703 ppc->ppc_avm = chipset_mode;
704 }
705
706 if (bootverbose)
707 printf("\n");
708
709 ppc->ppc_type = PPC_TYPE_GENERIC;
710 ppc_generic_setmode(ppc, chipset_mode);
711
712 return(chipset_mode);
713 }
714 return(-1);
715 }
716
717 /*
718 * ppc_smc37c66xgt_detect
719 *
720 * SMC FDC37C66xGT configuration.
721 */
722 static int
723 ppc_smc37c66xgt_detect(struct ppc_data *ppc, int chipset_mode)
724 {
725 int s, i;
726 u_char r;
727 int type = -1;
728 int csr = SMC66x_CSR; /* initial value is 0x3F0 */
729
730 int port_address[] = { -1 /* disabled */ , 0x3bc, 0x378, 0x278 };
731
732
733 #define cio csr+1 /* config IO port is either 0x3F1 or 0x371 */
734
735 /*
736 * Detection: enter configuration mode and read CRD register.
737 */
738
739 s = splhigh();
740 outb(csr, SMC665_iCODE);
741 outb(csr, SMC665_iCODE);
742 splx(s);
743
744 outb(csr, 0xd);
745 if (inb(cio) == 0x65) {
746 type = SMC_37C665GT;
747 goto config;
748 }
749
750 for (i = 0; i < 2; i++) {
751 s = splhigh();
752 outb(csr, SMC666_iCODE);
753 outb(csr, SMC666_iCODE);
754 splx(s);
755
756 outb(csr, 0xd);
757 if (inb(cio) == 0x66) {
758 type = SMC_37C666GT;
759 break;
760 }
761
762 /* Another chance, CSR may be hard-configured to be at 0x370 */
763 csr = SMC666_CSR;
764 }
765
766 config:
767 /*
768 * If chipset not found, do not continue.
769 */
770 if (type == -1)
771 return (-1);
772
773 /* select CR1 */
774 outb(csr, 0x1);
775
776 /* read the port's address: bits 0 and 1 of CR1 */
777 r = inb(cio) & SMC_CR1_ADDR;
778 if (port_address[(int)r] != ppc->ppc_base)
779 return (-1);
780
781 ppc->ppc_model = type;
782
783 /*
784 * CR1 and CR4 registers bits 3 and 0/1 for mode configuration
785 * If SPP mode is detected, try to set ECP+EPP mode
786 */
787
788 if (bootverbose) {
789 outb(csr, 0x1);
790 printf("ppc%d: SMC registers CR1=0x%x", ppc->ppc_unit,
791 inb(cio) & 0xff);
792
793 outb(csr, 0x4);
794 printf(" CR4=0x%x", inb(cio) & 0xff);
795 }
796
797 /* select CR1 */
798 outb(csr, 0x1);
799
800 if (!chipset_mode) {
801 /* autodetect mode */
802
803 /* 666GT is ~certainly~ hardwired to an extended ECP+EPP mode */
804 if (type == SMC_37C666GT) {
805 ppc->ppc_avm |= PPB_ECP | PPB_EPP | PPB_SPP;
806 if (bootverbose)
807 printf(" configuration hardwired, supposing " \
808 "ECP+EPP SPP");
809
810 } else
811 if ((inb(cio) & SMC_CR1_MODE) == 0) {
812 /* already in extended parallel port mode, read CR4 */
813 outb(csr, 0x4);
814 r = (inb(cio) & SMC_CR4_EMODE);
815
816 switch (r) {
817 case SMC_SPP:
818 ppc->ppc_avm |= PPB_SPP;
819 if (bootverbose)
820 printf(" SPP");
821 break;
822
823 case SMC_EPPSPP:
824 ppc->ppc_avm |= PPB_EPP | PPB_SPP;
825 if (bootverbose)
826 printf(" EPP SPP");
827 break;
828
829 case SMC_ECP:
830 ppc->ppc_avm |= PPB_ECP | PPB_SPP;
831 if (bootverbose)
832 printf(" ECP SPP");
833 break;
834
835 case SMC_ECPEPP:
836 ppc->ppc_avm |= PPB_ECP | PPB_EPP | PPB_SPP;
837 if (bootverbose)
838 printf(" ECP+EPP SPP");
839 break;
840 }
841 } else {
842 /* not an extended port mode */
843 ppc->ppc_avm |= PPB_SPP;
844 if (bootverbose)
845 printf(" SPP");
846 }
847
848 } else {
849 /* mode forced */
850 ppc->ppc_avm = chipset_mode;
851
852 /* 666GT is ~certainly~ hardwired to an extended ECP+EPP mode */
853 if (type == SMC_37C666GT)
854 goto end_detect;
855
856 r = inb(cio);
857 if ((chipset_mode & (PPB_ECP | PPB_EPP)) == 0) {
858 /* do not use ECP when the mode is not forced to */
859 outb(cio, r | SMC_CR1_MODE);
860 if (bootverbose)
861 printf(" SPP");
862 } else {
863 /* an extended mode is selected */
864 outb(cio, r & ~SMC_CR1_MODE);
865
866 /* read CR4 register and reset mode field */
867 outb(csr, 0x4);
868 r = inb(cio) & ~SMC_CR4_EMODE;
869
870 if (chipset_mode & PPB_ECP) {
871 if (chipset_mode & PPB_EPP) {
872 outb(cio, r | SMC_ECPEPP);
873 if (bootverbose)
874 printf(" ECP+EPP");
875 } else {
876 outb(cio, r | SMC_ECP);
877 if (bootverbose)
878 printf(" ECP");
879 }
880 } else {
881 /* PPB_EPP is set */
882 outb(cio, r | SMC_EPPSPP);
883 if (bootverbose)
884 printf(" EPP SPP");
885 }
886 }
887 ppc->ppc_avm = chipset_mode;
888 }
889
890 /* set FIFO threshold to 16 */
891 if (ppc->ppc_avm & PPB_ECP) {
892 /* select CRA */
893 outb(csr, 0xa);
894 outb(cio, 16);
895 }
896
897 end_detect:
898
899 if (bootverbose)
900 printf ("\n");
901
902 if (ppc->ppc_avm & PPB_EPP) {
903 /* select CR4 */
904 outb(csr, 0x4);
905 r = inb(cio);
906
907 /*
908 * Set the EPP protocol...
909 * Low=EPP 1.9 (1284 standard) and High=EPP 1.7
910 */
911 if (ppc->ppc_epp == EPP_1_9)
912 outb(cio, (r & ~SMC_CR4_EPPTYPE));
913 else
914 outb(cio, (r | SMC_CR4_EPPTYPE));
915 }
916
917 /* end config mode */
918 outb(csr, 0xaa);
919
920 ppc->ppc_type = PPC_TYPE_SMCLIKE;
921 ppc_smclike_setmode(ppc, chipset_mode);
922
923 return (chipset_mode);
924 }
925
926 /*
927 * SMC FDC37C935 configuration
928 * Found on many Alpha machines
929 */
930 static int
931 ppc_smc37c935_detect(struct ppc_data *ppc, int chipset_mode)
932 {
933 int s;
934 int type = -1;
935
936 s = splhigh();
937 outb(SMC935_CFG, 0x55); /* enter config mode */
938 outb(SMC935_CFG, 0x55);
939 splx(s);
940
941 outb(SMC935_IND, SMC935_ID); /* check device id */
942 if (inb(SMC935_DAT) == 0x2)
943 type = SMC_37C935;
944
945 if (type == -1) {
946 outb(SMC935_CFG, 0xaa); /* exit config mode */
947 return (-1);
948 }
949
950 ppc->ppc_model = type;
951
952 outb(SMC935_IND, SMC935_LOGDEV); /* select parallel port, */
953 outb(SMC935_DAT, 3); /* which is logical device 3 */
954
955 /* set io port base */
956 outb(SMC935_IND, SMC935_PORTHI);
957 outb(SMC935_DAT, (u_char)((ppc->ppc_base & 0xff00) >> 8));
958 outb(SMC935_IND, SMC935_PORTLO);
959 outb(SMC935_DAT, (u_char)(ppc->ppc_base & 0xff));
960
961 if (!chipset_mode)
962 ppc->ppc_avm = PPB_COMPATIBLE; /* default mode */
963 else {
964 ppc->ppc_avm = chipset_mode;
965 outb(SMC935_IND, SMC935_PPMODE);
966 outb(SMC935_DAT, SMC935_CENT); /* start in compatible mode */
967
968 /* SPP + EPP or just plain SPP */
969 if (chipset_mode & (PPB_SPP)) {
970 if (chipset_mode & PPB_EPP) {
971 if (ppc->ppc_epp == EPP_1_9) {
972 outb(SMC935_IND, SMC935_PPMODE);
973 outb(SMC935_DAT, SMC935_EPP19SPP);
974 }
975 if (ppc->ppc_epp == EPP_1_7) {
976 outb(SMC935_IND, SMC935_PPMODE);
977 outb(SMC935_DAT, SMC935_EPP17SPP);
978 }
979 } else {
980 outb(SMC935_IND, SMC935_PPMODE);
981 outb(SMC935_DAT, SMC935_SPP);
982 }
983 }
984
985 /* ECP + EPP or just plain ECP */
986 if (chipset_mode & PPB_ECP) {
987 if (chipset_mode & PPB_EPP) {
988 if (ppc->ppc_epp == EPP_1_9) {
989 outb(SMC935_IND, SMC935_PPMODE);
990 outb(SMC935_DAT, SMC935_ECPEPP19);
991 }
992 if (ppc->ppc_epp == EPP_1_7) {
993 outb(SMC935_IND, SMC935_PPMODE);
994 outb(SMC935_DAT, SMC935_ECPEPP17);
995 }
996 } else {
997 outb(SMC935_IND, SMC935_PPMODE);
998 outb(SMC935_DAT, SMC935_ECP);
999 }
1000 }
1001 }
1002
1003 outb(SMC935_CFG, 0xaa); /* exit config mode */
1004
1005 ppc->ppc_type = PPC_TYPE_SMCLIKE;
1006 ppc_smclike_setmode(ppc, chipset_mode);
1007
1008 return (chipset_mode);
1009 }
1010
1011 /*
1012 * Winbond W83877F stuff
1013 *
1014 * EFER: extended function enable register
1015 * EFIR: extended function index register
1016 * EFDR: extended function data register
1017 */
1018 #define efir ((efer == 0x250) ? 0x251 : 0x3f0)
1019 #define efdr ((efer == 0x250) ? 0x252 : 0x3f1)
1020
1021 static int w83877f_efers[] = { 0x250, 0x3f0, 0x3f0, 0x250 };
1022 static int w83877f_keys[] = { 0x89, 0x86, 0x87, 0x88 };
1023 static int w83877f_keyiter[] = { 1, 2, 2, 1 };
1024 static int w83877f_hefs[] = { WINB_HEFERE, WINB_HEFRAS, WINB_HEFERE | WINB_HEFRAS, 0 };
1025
1026 static int
1027 ppc_w83877f_detect(struct ppc_data *ppc, int chipset_mode)
1028 {
1029 int i, j, efer;
1030 unsigned char r, hefere, hefras;
1031
1032 for (i = 0; i < 4; i ++) {
1033 /* first try to enable configuration registers */
1034 efer = w83877f_efers[i];
1035
1036 /* write the key to the EFER */
1037 for (j = 0; j < w83877f_keyiter[i]; j ++)
1038 outb (efer, w83877f_keys[i]);
1039
1040 /* then check HEFERE and HEFRAS bits */
1041 outb (efir, 0x0c);
1042 hefere = inb(efdr) & WINB_HEFERE;
1043
1044 outb (efir, 0x16);
1045 hefras = inb(efdr) & WINB_HEFRAS;
1046
1047 /*
1048 * HEFRAS HEFERE
1049 * 0 1 write 89h to 250h (power-on default)
1050 * 1 0 write 86h twice to 3f0h
1051 * 1 1 write 87h twice to 3f0h
1052 * 0 0 write 88h to 250h
1053 */
1054 if ((hefere | hefras) == w83877f_hefs[i])
1055 goto found;
1056 }
1057
1058 return (-1); /* failed */
1059
1060 found:
1061 /* check base port address - read from CR23 */
1062 outb(efir, 0x23);
1063 if (ppc->ppc_base != inb(efdr) * 4) /* 4 bytes boundaries */
1064 return (-1);
1065
1066 /* read CHIP ID from CR9/bits0-3 */
1067 outb(efir, 0x9);
1068
1069 switch (inb(efdr) & WINB_CHIPID) {
1070 case WINB_W83877F_ID:
1071 ppc->ppc_model = WINB_W83877F;
1072 break;
1073
1074 case WINB_W83877AF_ID:
1075 ppc->ppc_model = WINB_W83877AF;
1076 break;
1077
1078 default:
1079 ppc->ppc_model = WINB_UNKNOWN;
1080 }
1081
1082 if (bootverbose) {
1083 /* dump of registers */
1084 printf("ppc%d: 0x%x - ", ppc->ppc_unit, w83877f_keys[i]);
1085 for (i = 0; i <= 0xd; i ++) {
1086 outb(efir, i);
1087 printf("0x%x ", inb(efdr));
1088 }
1089 for (i = 0x10; i <= 0x17; i ++) {
1090 outb(efir, i);
1091 printf("0x%x ", inb(efdr));
1092 }
1093 outb(efir, 0x1e);
1094 printf("0x%x ", inb(efdr));
1095 for (i = 0x20; i <= 0x29; i ++) {
1096 outb(efir, i);
1097 printf("0x%x ", inb(efdr));
1098 }
1099 printf("\n");
1100 printf("ppc%d:", ppc->ppc_unit);
1101 }
1102
1103 ppc->ppc_type = PPC_TYPE_GENERIC;
1104
1105 if (!chipset_mode) {
1106 /* autodetect mode */
1107
1108 /* select CR0 */
1109 outb(efir, 0x0);
1110 r = inb(efdr) & (WINB_PRTMODS0 | WINB_PRTMODS1);
1111
1112 /* select CR9 */
1113 outb(efir, 0x9);
1114 r |= (inb(efdr) & WINB_PRTMODS2);
1115
1116 switch (r) {
1117 case WINB_W83757:
1118 if (bootverbose)
1119 printf("ppc%d: W83757 compatible mode\n",
1120 ppc->ppc_unit);
1121 return (-1); /* generic or SMC-like */
1122
1123 case WINB_EXTFDC:
1124 case WINB_EXTADP:
1125 case WINB_EXT2FDD:
1126 case WINB_JOYSTICK:
1127 if (bootverbose)
1128 printf(" not in parallel port mode\n");
1129 return (-1);
1130
1131 case (WINB_PARALLEL | WINB_EPP_SPP):
1132 ppc->ppc_avm |= PPB_EPP | PPB_SPP;
1133 if (bootverbose)
1134 printf(" EPP SPP");
1135 break;
1136
1137 case (WINB_PARALLEL | WINB_ECP):
1138 ppc->ppc_avm |= PPB_ECP | PPB_SPP;
1139 if (bootverbose)
1140 printf(" ECP SPP");
1141 break;
1142
1143 case (WINB_PARALLEL | WINB_ECP_EPP):
1144 ppc->ppc_avm |= PPB_ECP | PPB_EPP | PPB_SPP;
1145 ppc->ppc_type = PPC_TYPE_SMCLIKE;
1146
1147 if (bootverbose)
1148 printf(" ECP+EPP SPP");
1149 break;
1150 default:
1151 printf("%s: unknown case (0x%x)!\n", __FUNCTION__, r);
1152 }
1153
1154 } else {
1155 /* mode forced */
1156
1157 /* select CR9 and set PRTMODS2 bit */
1158 outb(efir, 0x9);
1159 outb(efdr, inb(efdr) & ~WINB_PRTMODS2);
1160
1161 /* select CR0 and reset PRTMODSx bits */
1162 outb(efir, 0x0);
1163 outb(efdr, inb(efdr) & ~(WINB_PRTMODS0 | WINB_PRTMODS1));
1164
1165 if (chipset_mode & PPB_ECP) {
1166 if (chipset_mode & PPB_EPP) {
1167 outb(efdr, inb(efdr) | WINB_ECP_EPP);
1168 if (bootverbose)
1169 printf(" ECP+EPP");
1170
1171 ppc->ppc_type = PPC_TYPE_SMCLIKE;
1172
1173 } else {
1174 outb(efdr, inb(efdr) | WINB_ECP);
1175 if (bootverbose)
1176 printf(" ECP");
1177 }
1178 } else {
1179 /* select EPP_SPP otherwise */
1180 outb(efdr, inb(efdr) | WINB_EPP_SPP);
1181 if (bootverbose)
1182 printf(" EPP SPP");
1183 }
1184 ppc->ppc_avm = chipset_mode;
1185 }
1186
1187 if (bootverbose)
1188 printf("\n");
1189
1190 /* exit configuration mode */
1191 outb(efer, 0xaa);
1192
1193 switch (ppc->ppc_type) {
1194 case PPC_TYPE_SMCLIKE:
1195 ppc_smclike_setmode(ppc, chipset_mode);
1196 break;
1197 default:
1198 ppc_generic_setmode(ppc, chipset_mode);
1199 break;
1200 }
1201
1202 return (chipset_mode);
1203 }
1204 #endif
1205
1206 /*
1207 * ppc_generic_detect
1208 */
1209 static int
1210 ppc_generic_detect(struct ppc_data *ppc, int chipset_mode)
1211 {
1212 /* default to generic */
1213 ppc->ppc_type = PPC_TYPE_GENERIC;
1214
1215 if (bootverbose)
1216 printf("ppc%d:", ppc->ppc_unit);
1217
1218 /* first, check for ECP */
1219 w_ecr(ppc, PPC_ECR_PS2);
1220 if ((r_ecr(ppc) & 0xe0) == PPC_ECR_PS2) {
1221 ppc->ppc_dtm |= PPB_ECP | PPB_SPP;
1222 if (bootverbose)
1223 printf(" ECP SPP");
1224
1225 /* search for SMC style ECP+EPP mode */
1226 w_ecr(ppc, PPC_ECR_EPP);
1227 }
1228
1229 /* try to reset EPP timeout bit */
1230 if (ppc_check_epp_timeout(ppc)) {
1231 ppc->ppc_dtm |= PPB_EPP;
1232
1233 if (ppc->ppc_dtm & PPB_ECP) {
1234 /* SMC like chipset found */
1235 ppc->ppc_model = SMC_LIKE;
1236 ppc->ppc_type = PPC_TYPE_SMCLIKE;
1237
1238 if (bootverbose)
1239 printf(" ECP+EPP");
1240 } else {
1241 if (bootverbose)
1242 printf(" EPP");
1243 }
1244 } else {
1245 /* restore to standard mode */
1246 w_ecr(ppc, PPC_ECR_STD);
1247 }
1248
1249 /* XXX try to detect NIBBLE and PS2 modes */
1250 ppc->ppc_dtm |= PPB_NIBBLE;
1251
1252 if (bootverbose)
1253 printf(" SPP");
1254
1255 if (chipset_mode)
1256 ppc->ppc_avm = chipset_mode;
1257 else
1258 ppc->ppc_avm = ppc->ppc_dtm;
1259
1260 if (bootverbose)
1261 printf("\n");
1262
1263 switch (ppc->ppc_type) {
1264 case PPC_TYPE_SMCLIKE:
1265 ppc_smclike_setmode(ppc, chipset_mode);
1266 break;
1267 default:
1268 ppc_generic_setmode(ppc, chipset_mode);
1269 break;
1270 }
1271
1272 return (chipset_mode);
1273 }
1274
1275 /*
1276 * ppc_detect()
1277 *
1278 * mode is the mode suggested at boot
1279 */
1280 static int
1281 ppc_detect(struct ppc_data *ppc, int chipset_mode) {
1282
1283 #ifdef PPC_PROBE_CHIPSET
1284 int i, mode;
1285
1286 /* list of supported chipsets */
1287 int (*chipset_detect[])(struct ppc_data *, int) = {
1288 ppc_pc873xx_detect,
1289 ppc_smc37c66xgt_detect,
1290 ppc_w83877f_detect,
1291 ppc_smc37c935_detect,
1292 ppc_generic_detect,
1293 NULL
1294 };
1295 #endif
1296
1297 /* if can't find the port and mode not forced return error */
1298 if (!ppc_detect_port(ppc) && chipset_mode == 0)
1299 return (EIO); /* failed, port not present */
1300
1301 /* assume centronics compatible mode is supported */
1302 ppc->ppc_avm = PPB_COMPATIBLE;
1303
1304 #ifdef PPC_PROBE_CHIPSET
1305 /* we have to differenciate available chipset modes,
1306 * chipset running modes and IEEE-1284 operating modes
1307 *
1308 * after detection, the port must support running in compatible mode
1309 */
1310 if (ppc->ppc_flags & 0x40) {
1311 if (bootverbose)
1312 printf("ppc: chipset forced to generic\n");
1313 #endif
1314
1315 ppc->ppc_mode = ppc_generic_detect(ppc, chipset_mode);
1316
1317 #ifdef PPC_PROBE_CHIPSET
1318 } else {
1319 for (i=0; chipset_detect[i] != NULL; i++) {
1320 if ((mode = chipset_detect[i](ppc, chipset_mode)) != -1) {
1321 ppc->ppc_mode = mode;
1322 break;
1323 }
1324 }
1325 }
1326 #endif
1327
1328 /* configure/detect ECP FIFO */
1329 if ((ppc->ppc_avm & PPB_ECP) && !(ppc->ppc_flags & 0x80))
1330 ppc_detect_fifo(ppc);
1331
1332 return (0);
1333 }
1334
1335 /*
1336 * ppc_exec_microseq()
1337 *
1338 * Execute a microsequence.
1339 * Microsequence mechanism is supposed to handle fast I/O operations.
1340 */
1341 static int
1342 ppc_exec_microseq(device_t dev, struct ppb_microseq **p_msq)
1343 {
1344 struct ppc_data *ppc = DEVTOSOFTC(dev);
1345 struct ppb_microseq *mi;
1346 char cc, *p;
1347 int i, iter, len;
1348 int error;
1349
1350 register int reg;
1351 register char mask;
1352 register int accum = 0;
1353 register char *ptr = 0;
1354
1355 struct ppb_microseq *stack = 0;
1356
1357 /* microsequence registers are equivalent to PC-like port registers */
1358
1359 #define r_reg(register,ppc) (bus_space_read_1((ppc)->bst, (ppc)->bsh, register))
1360 #define w_reg(register, ppc, byte) (bus_space_write_1((ppc)->bst, (ppc)->bsh, register, byte))
1361
1362 #define INCR_PC (mi ++) /* increment program counter */
1363
1364 mi = *p_msq;
1365 for (;;) {
1366 switch (mi->opcode) {
1367 case MS_OP_RSET:
1368 cc = r_reg(mi->arg[0].i, ppc);
1369 cc &= (char)mi->arg[2].i; /* clear mask */
1370 cc |= (char)mi->arg[1].i; /* assert mask */
1371 w_reg(mi->arg[0].i, ppc, cc);
1372 INCR_PC;
1373 break;
1374
1375 case MS_OP_RASSERT_P:
1376 reg = mi->arg[1].i;
1377 ptr = ppc->ppc_ptr;
1378
1379 if ((len = mi->arg[0].i) == MS_ACCUM) {
1380 accum = ppc->ppc_accum;
1381 for (; accum; accum--)
1382 w_reg(reg, ppc, *ptr++);
1383 ppc->ppc_accum = accum;
1384 } else
1385 for (i=0; i<len; i++)
1386 w_reg(reg, ppc, *ptr++);
1387 ppc->ppc_ptr = ptr;
1388
1389 INCR_PC;
1390 break;
1391
1392 case MS_OP_RFETCH_P:
1393 reg = mi->arg[1].i;
1394 mask = (char)mi->arg[2].i;
1395 ptr = ppc->ppc_ptr;
1396
1397 if ((len = mi->arg[0].i) == MS_ACCUM) {
1398 accum = ppc->ppc_accum;
1399 for (; accum; accum--)
1400 *ptr++ = r_reg(reg, ppc) & mask;
1401 ppc->ppc_accum = accum;
1402 } else
1403 for (i=0; i<len; i++)
1404 *ptr++ = r_reg(reg, ppc) & mask;
1405 ppc->ppc_ptr = ptr;
1406
1407 INCR_PC;
1408 break;
1409
1410 case MS_OP_RFETCH:
1411 *((char *) mi->arg[2].p) = r_reg(mi->arg[0].i, ppc) &
1412 (char)mi->arg[1].i;
1413 INCR_PC;
1414 break;
1415
1416 case MS_OP_RASSERT:
1417 case MS_OP_DELAY:
1418
1419 /* let's suppose the next instr. is the same */
1420 prefetch:
1421 for (;mi->opcode == MS_OP_RASSERT; INCR_PC)
1422 w_reg(mi->arg[0].i, ppc, (char)mi->arg[1].i);
1423
1424 if (mi->opcode == MS_OP_DELAY) {
1425 DELAY(mi->arg[0].i);
1426 INCR_PC;
1427 goto prefetch;
1428 }
1429 break;
1430
1431 case MS_OP_ADELAY:
1432 if (mi->arg[0].i)
1433 tsleep(NULL, PPBPRI, "ppbdelay",
1434 mi->arg[0].i * (hz/1000));
1435 INCR_PC;
1436 break;
1437
1438 case MS_OP_TRIG:
1439 reg = mi->arg[0].i;
1440 iter = mi->arg[1].i;
1441 p = (char *)mi->arg[2].p;
1442
1443 /* XXX delay limited to 255 us */
1444 for (i=0; i<iter; i++) {
1445 w_reg(reg, ppc, *p++);
1446 DELAY((unsigned char)*p++);
1447 }
1448 INCR_PC;
1449 break;
1450
1451 case MS_OP_SET:
1452 ppc->ppc_accum = mi->arg[0].i;
1453 INCR_PC;
1454 break;
1455
1456 case MS_OP_DBRA:
1457 if (--ppc->ppc_accum > 0)
1458 mi += mi->arg[0].i;
1459 INCR_PC;
1460 break;
1461
1462 case MS_OP_BRSET:
1463 cc = r_str(ppc);
1464 if ((cc & (char)mi->arg[0].i) == (char)mi->arg[0].i)
1465 mi += mi->arg[1].i;
1466 INCR_PC;
1467 break;
1468
1469 case MS_OP_BRCLEAR:
1470 cc = r_str(ppc);
1471 if ((cc & (char)mi->arg[0].i) == 0)
1472 mi += mi->arg[1].i;
1473 INCR_PC;
1474 break;
1475
1476 case MS_OP_BRSTAT:
1477 cc = r_str(ppc);
1478 if ((cc & ((char)mi->arg[0].i | (char)mi->arg[1].i)) ==
1479 (char)mi->arg[0].i)
1480 mi += mi->arg[2].i;
1481 INCR_PC;
1482 break;
1483
1484 case MS_OP_C_CALL:
1485 /*
1486 * If the C call returns !0 then end the microseq.
1487 * The current state of ptr is passed to the C function
1488 */
1489 if ((error = mi->arg[0].f(mi->arg[1].p, ppc->ppc_ptr)))
1490 return (error);
1491
1492 INCR_PC;
1493 break;
1494
1495 case MS_OP_PTR:
1496 ppc->ppc_ptr = (char *)mi->arg[0].p;
1497 INCR_PC;
1498 break;
1499
1500 case MS_OP_CALL:
1501 if (stack)
1502 panic("%s: too much calls", __FUNCTION__);
1503
1504 if (mi->arg[0].p) {
1505 /* store the state of the actual
1506 * microsequence
1507 */
1508 stack = mi;
1509
1510 /* jump to the new microsequence */
1511 mi = (struct ppb_microseq *)mi->arg[0].p;
1512 } else
1513 INCR_PC;
1514
1515 break;
1516
1517 case MS_OP_SUBRET:
1518 /* retrieve microseq and pc state before the call */
1519 mi = stack;
1520
1521 /* reset the stack */
1522 stack = 0;
1523
1524 /* XXX return code */
1525
1526 INCR_PC;
1527 break;
1528
1529 case MS_OP_PUT:
1530 case MS_OP_GET:
1531 case MS_OP_RET:
1532 /* can't return to ppb level during the execution
1533 * of a submicrosequence */
1534 if (stack)
1535 panic("%s: can't return to ppb level",
1536 __FUNCTION__);
1537
1538 /* update pc for ppb level of execution */
1539 *p_msq = mi;
1540
1541 /* return to ppb level of execution */
1542 return (0);
1543
1544 default:
1545 panic("%s: unknown microsequence opcode 0x%x",
1546 __FUNCTION__, mi->opcode);
1547 }
1548 }
1549
1550 /* unreached */
1551 }
1552
1553 static void
1554 ppcintr(void *arg)
1555 {
1556 device_t dev = (device_t)arg;
1557 struct ppc_data *ppc = (struct ppc_data *)device_get_softc(dev);
1558 u_char ctr, ecr, str;
1559
1560 str = r_str(ppc);
1561 ctr = r_ctr(ppc);
1562 ecr = r_ecr(ppc);
1563
1564 #if PPC_DEBUG > 1
1565 printf("![%x/%x/%x]", ctr, ecr, str);
1566 #endif
1567
1568 /* don't use ecp mode with IRQENABLE set */
1569 if (ctr & IRQENABLE) {
1570 return;
1571 }
1572
1573 /* interrupts are generated by nFault signal
1574 * only in ECP mode */
1575 if ((str & nFAULT) && (ppc->ppc_mode & PPB_ECP)) {
1576 /* check if ppc driver has programmed the
1577 * nFault interrupt */
1578 if (ppc->ppc_irqstat & PPC_IRQ_nFAULT) {
1579
1580 w_ecr(ppc, ecr | PPC_nFAULT_INTR);
1581 ppc->ppc_irqstat &= ~PPC_IRQ_nFAULT;
1582 } else {
1583 /* shall be handled by underlying layers XXX */
1584 return;
1585 }
1586 }
1587
1588 if (ppc->ppc_irqstat & PPC_IRQ_DMA) {
1589 /* disable interrupts (should be done by hardware though) */
1590 w_ecr(ppc, ecr | PPC_SERVICE_INTR);
1591 ppc->ppc_irqstat &= ~PPC_IRQ_DMA;
1592 ecr = r_ecr(ppc);
1593
1594 /* check if DMA completed */
1595 if ((ppc->ppc_avm & PPB_ECP) && (ecr & PPC_ENABLE_DMA)) {
1596 #ifdef PPC_DEBUG
1597 printf("a");
1598 #endif
1599 /* stop DMA */
1600 w_ecr(ppc, ecr & ~PPC_ENABLE_DMA);
1601 ecr = r_ecr(ppc);
1602
1603 if (ppc->ppc_dmastat == PPC_DMA_STARTED) {
1604 #ifdef PPC_DEBUG
1605 printf("d");
1606 #endif
1607 isa_dmadone(
1608 ppc->ppc_dmaflags,
1609 ppc->ppc_dmaddr,
1610 ppc->ppc_dmacnt,
1611 ppc->ppc_dmachan);
1612
1613 ppc->ppc_dmastat = PPC_DMA_COMPLETE;
1614
1615 /* wakeup the waiting process */
1616 wakeup((caddr_t)ppc);
1617 }
1618 }
1619 } else if (ppc->ppc_irqstat & PPC_IRQ_FIFO) {
1620
1621 /* classic interrupt I/O */
1622 ppc->ppc_irqstat &= ~PPC_IRQ_FIFO;
1623 }
1624
1625 return;
1626 }
1627
1628 static int
1629 ppc_read(device_t dev, char *buf, int len, int mode)
1630 {
1631 return (EINVAL);
1632 }
1633
1634 /*
1635 * Call this function if you want to send data in any advanced mode
1636 * of your parallel port: FIFO, DMA
1637 *
1638 * If what you want is not possible (no ECP, no DMA...),
1639 * EINVAL is returned
1640 */
1641 static int
1642 ppc_write(device_t dev, char *buf, int len, int how)
1643 {
1644 struct ppc_data *ppc = DEVTOSOFTC(dev);
1645 char ecr, ecr_sav, ctr, ctr_sav;
1646 int s, error = 0;
1647 int spin;
1648
1649 #ifdef PPC_DEBUG
1650 printf("w");
1651 #endif
1652
1653 ecr_sav = r_ecr(ppc);
1654 ctr_sav = r_ctr(ppc);
1655
1656 /*
1657 * Send buffer with DMA, FIFO and interrupts
1658 */
1659 if ((ppc->ppc_avm & PPB_ECP) && (ppc->ppc_registered)) {
1660
1661 if (ppc->ppc_dmachan > 0) {
1662
1663 /* byte mode, no intr, no DMA, dir=0, flush fifo
1664 */
1665 ecr = PPC_ECR_STD | PPC_DISABLE_INTR;
1666 w_ecr(ppc, ecr);
1667
1668 /* disable nAck interrupts */
1669 ctr = r_ctr(ppc);
1670 ctr &= ~IRQENABLE;
1671 w_ctr(ppc, ctr);
1672
1673 ppc->ppc_dmaflags = 0;
1674 ppc->ppc_dmaddr = (caddr_t)buf;
1675 ppc->ppc_dmacnt = (u_int)len;
1676
1677 switch (ppc->ppc_mode) {
1678 case PPB_COMPATIBLE:
1679 /* compatible mode with FIFO, no intr, DMA, dir=0 */
1680 ecr = PPC_ECR_FIFO | PPC_DISABLE_INTR | PPC_ENABLE_DMA;
1681 break;
1682 case PPB_ECP:
1683 ecr = PPC_ECR_ECP | PPC_DISABLE_INTR | PPC_ENABLE_DMA;
1684 break;
1685 default:
1686 error = EINVAL;
1687 goto error;
1688 }
1689
1690 w_ecr(ppc, ecr);
1691 ecr = r_ecr(ppc);
1692
1693 /* enter splhigh() not to be preempted
1694 * by the dma interrupt, we may miss
1695 * the wakeup otherwise
1696 */
1697 s = splhigh();
1698
1699 ppc->ppc_dmastat = PPC_DMA_INIT;
1700
1701 /* enable interrupts */
1702 ecr &= ~PPC_SERVICE_INTR;
1703 ppc->ppc_irqstat = PPC_IRQ_DMA;
1704 w_ecr(ppc, ecr);
1705
1706 isa_dmastart(
1707 ppc->ppc_dmaflags,
1708 ppc->ppc_dmaddr,
1709 ppc->ppc_dmacnt,
1710 ppc->ppc_dmachan);
1711 #ifdef PPC_DEBUG
1712 printf("s%d", ppc->ppc_dmacnt);
1713 #endif
1714 ppc->ppc_dmastat = PPC_DMA_STARTED;
1715
1716 /* Wait for the DMA completed interrupt. We hope we won't
1717 * miss it, otherwise a signal will be necessary to unlock the
1718 * process.
1719 */
1720 do {
1721 /* release CPU */
1722 error = tsleep((caddr_t)ppc,
1723 PPBPRI | PCATCH, "ppcdma", 0);
1724
1725 } while (error == EWOULDBLOCK);
1726
1727 splx(s);
1728
1729 if (error) {
1730 #ifdef PPC_DEBUG
1731 printf("i");
1732 #endif
1733 /* stop DMA */
1734 isa_dmadone(
1735 ppc->ppc_dmaflags, ppc->ppc_dmaddr,
1736 ppc->ppc_dmacnt, ppc->ppc_dmachan);
1737
1738 /* no dma, no interrupt, flush the fifo */
1739 w_ecr(ppc, PPC_ECR_RESET);
1740
1741 ppc->ppc_dmastat = PPC_DMA_INTERRUPTED;
1742 goto error;
1743 }
1744
1745 /* wait for an empty fifo */
1746 while (!(r_ecr(ppc) & PPC_FIFO_EMPTY)) {
1747
1748 for (spin=100; spin; spin--)
1749 if (r_ecr(ppc) & PPC_FIFO_EMPTY)
1750 goto fifo_empty;
1751 #ifdef PPC_DEBUG
1752 printf("Z");
1753 #endif
1754 error = tsleep((caddr_t)ppc, PPBPRI | PCATCH, "ppcfifo", hz/100);
1755 if (error != EWOULDBLOCK) {
1756 #ifdef PPC_DEBUG
1757 printf("I");
1758 #endif
1759 /* no dma, no interrupt, flush the fifo */
1760 w_ecr(ppc, PPC_ECR_RESET);
1761
1762 ppc->ppc_dmastat = PPC_DMA_INTERRUPTED;
1763 error = EINTR;
1764 goto error;
1765 }
1766 }
1767
1768 fifo_empty:
1769 /* no dma, no interrupt, flush the fifo */
1770 w_ecr(ppc, PPC_ECR_RESET);
1771
1772 } else
1773 error = EINVAL; /* XXX we should FIFO and
1774 * interrupts */
1775 } else
1776 error = EINVAL;
1777
1778 error:
1779
1780 /* PDRQ must be kept unasserted until nPDACK is
1781 * deasserted for a minimum of 350ns (SMC datasheet)
1782 *
1783 * Consequence may be a FIFO that never empty
1784 */
1785 DELAY(1);
1786
1787 w_ecr(ppc, ecr_sav);
1788 w_ctr(ppc, ctr_sav);
1789
1790 return (error);
1791 }
1792
1793 static void
1794 ppc_reset_epp(device_t dev)
1795 {
1796 struct ppc_data *ppc = DEVTOSOFTC(dev);
1797
1798 ppc_reset_epp_timeout(ppc);
1799
1800 return;
1801 }
1802
1803 static int
1804 ppc_setmode(device_t dev, int mode)
1805 {
1806 struct ppc_data *ppc = DEVTOSOFTC(dev);
1807
1808 switch (ppc->ppc_type) {
1809 case PPC_TYPE_SMCLIKE:
1810 return (ppc_smclike_setmode(ppc, mode));
1811 break;
1812
1813 case PPC_TYPE_GENERIC:
1814 default:
1815 return (ppc_generic_setmode(ppc, mode));
1816 break;
1817 }
1818
1819 /* not reached */
1820 return (ENXIO);
1821 }
1822
1823 static struct isa_pnp_id lpc_ids[] = {
1824 { 0x0004d041, "Standard parallel printer port" }, /* PNP0400 */
1825 { 0x0104d041, "ECP parallel printer port" }, /* PNP0401 */
1826 { 0 }
1827 };
1828
1829 static int
1830 ppc_probe(device_t dev)
1831 {
1832 #ifdef __i386__
1833 static short next_bios_ppc = 0;
1834 #endif
1835 struct ppc_data *ppc;
1836 device_t parent;
1837 int error;
1838 u_long port;
1839
1840 parent = device_get_parent(dev);
1841
1842 error = ISA_PNP_PROBE(parent, dev, lpc_ids);
1843 if (error == ENXIO)
1844 return (ENXIO);
1845 else if (error != 0) /* XXX shall be set after detection */
1846 device_set_desc(dev, "Parallel port");
1847
1848 /*
1849 * Allocate the ppc_data structure.
1850 */
1851 ppc = DEVTOSOFTC(dev);
1852 bzero(ppc, sizeof(struct ppc_data));
1853
1854 ppc->rid_irq = ppc->rid_drq = ppc->rid_ioport = 0;
1855 ppc->res_irq = ppc->res_drq = ppc->res_ioport = 0;
1856
1857 /* retrieve ISA parameters */
1858 error = bus_get_resource(dev, SYS_RES_IOPORT, 0, &port, NULL);
1859
1860 #ifdef __i386__
1861 /*
1862 * If port not specified, use bios list.
1863 */
1864 if (error) {
1865 if((next_bios_ppc < BIOS_MAX_PPC) &&
1866 (*(BIOS_PORTS+next_bios_ppc) != 0) ) {
1867 port = *(BIOS_PORTS+next_bios_ppc++);
1868 if (bootverbose)
1869 device_printf(dev, "parallel port found at 0x%x\n",
1870 (int) port);
1871 } else {
1872 device_printf(dev, "parallel port not found.\n");
1873 return ENXIO;
1874 }
1875 bus_set_resource(dev, SYS_RES_IOPORT, 0, port,
1876 IO_LPTSIZE_EXTENDED);
1877 }
1878 #endif
1879 #ifdef __alpha__
1880 /*
1881 * There isn't a bios list on alpha. Put it in the usual place.
1882 */
1883 if (error) {
1884 bus_set_resource(dev, SYS_RES_IOPORT, 0, 0x3bc,
1885 IO_LPTSIZE_NORMAL);
1886 }
1887 #endif
1888
1889 /* IO port is mandatory */
1890
1891 /* Try "extended" IO port range...*/
1892 ppc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
1893 &ppc->rid_ioport, 0, ~0,
1894 IO_LPTSIZE_EXTENDED, RF_ACTIVE);
1895
1896 if (ppc->res_ioport != 0) {
1897 if (bootverbose)
1898 device_printf(dev, "using extended I/O port range\n");
1899 } else {
1900 /* Failed? If so, then try the "normal" IO port range... */
1901 ppc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
1902 &ppc->rid_ioport, 0, ~0,
1903 IO_LPTSIZE_NORMAL,
1904 RF_ACTIVE);
1905 if (ppc->res_ioport != 0) {
1906 if (bootverbose)
1907 device_printf(dev, "using normal I/O port range\n");
1908 } else {
1909 device_printf(dev, "cannot reserve I/O port range\n");
1910 goto error;
1911 }
1912 }
1913
1914 ppc->ppc_base = rman_get_start(ppc->res_ioport);
1915
1916 ppc->bsh = rman_get_bushandle(ppc->res_ioport);
1917 ppc->bst = rman_get_bustag(ppc->res_ioport);
1918
1919 ppc->ppc_flags = device_get_flags(dev);
1920
1921 if (!(ppc->ppc_flags & 0x20)) {
1922 ppc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &ppc->rid_irq,
1923 0ul, ~0ul, 1, RF_SHAREABLE);
1924 ppc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, &ppc->rid_drq,
1925 0ul, ~0ul, 1, RF_ACTIVE);
1926 }
1927
1928 if (ppc->res_irq)
1929 ppc->ppc_irq = rman_get_start(ppc->res_irq);
1930 if (ppc->res_drq)
1931 ppc->ppc_dmachan = rman_get_start(ppc->res_drq);
1932
1933 ppc->ppc_unit = device_get_unit(dev);
1934 ppc->ppc_model = GENERIC;
1935
1936 ppc->ppc_mode = PPB_COMPATIBLE;
1937 ppc->ppc_epp = (ppc->ppc_flags & 0x10) >> 4;
1938
1939 ppc->ppc_type = PPC_TYPE_GENERIC;
1940
1941 /*
1942 * Try to detect the chipset and its mode.
1943 */
1944 if (ppc_detect(ppc, ppc->ppc_flags & 0xf))
1945 goto error;
1946
1947 return (0);
1948
1949 error:
1950 if (ppc->res_irq != 0) {
1951 bus_release_resource(dev, SYS_RES_IRQ, ppc->rid_irq,
1952 ppc->res_irq);
1953 }
1954 if (ppc->res_ioport != 0) {
1955 bus_deactivate_resource(dev, SYS_RES_IOPORT, ppc->rid_ioport,
1956 ppc->res_ioport);
1957 bus_release_resource(dev, SYS_RES_IOPORT, ppc->rid_ioport,
1958 ppc->res_ioport);
1959 }
1960 if (ppc->res_drq != 0) {
1961 bus_deactivate_resource(dev, SYS_RES_DRQ, ppc->rid_drq,
1962 ppc->res_drq);
1963 bus_release_resource(dev, SYS_RES_DRQ, ppc->rid_drq,
1964 ppc->res_drq);
1965 }
1966 return (ENXIO);
1967 }
1968
1969 static int
1970 ppc_attach(device_t dev)
1971 {
1972 struct ppc_data *ppc = DEVTOSOFTC(dev);
1973
1974 device_t ppbus;
1975 device_t parent = device_get_parent(dev);
1976
1977 device_printf(dev, "%s chipset (%s) in %s mode%s\n",
1978 ppc_models[ppc->ppc_model], ppc_avms[ppc->ppc_avm],
1979 ppc_modes[ppc->ppc_mode], (PPB_IS_EPP(ppc->ppc_mode)) ?
1980 ppc_epp_protocol[ppc->ppc_epp] : "");
1981
1982 if (ppc->ppc_fifo)
1983 device_printf(dev, "FIFO with %d/%d/%d bytes threshold\n",
1984 ppc->ppc_fifo, ppc->ppc_wthr, ppc->ppc_rthr);
1985
1986 if ((ppc->ppc_avm & PPB_ECP) && (ppc->ppc_dmachan > 0)) {
1987 /* acquire the DMA channel forever */ /* XXX */
1988 isa_dma_acquire(ppc->ppc_dmachan);
1989 isa_dmainit(ppc->ppc_dmachan, 1024); /* nlpt.BUFSIZE */
1990 }
1991
1992 /* add ppbus as a child of this isa to parallel bridge */
1993 ppbus = device_add_child(dev, "ppbus", -1);
1994
1995 /*
1996 * Probe the ppbus and attach devices found.
1997 */
1998 device_probe_and_attach(ppbus);
1999
2000 /* register the ppc interrupt handler as default */
2001 if (ppc->res_irq) {
2002 /* default to the tty mask for registration */ /* XXX */
2003 if (BUS_SETUP_INTR(parent, dev, ppc->res_irq, INTR_TYPE_TTY,
2004 ppcintr, dev, &ppc->intr_cookie) == 0) {
2005
2006 /* remember the ppcintr is registered */
2007 ppc->ppc_registered = 1;
2008 }
2009 }
2010
2011 return (0);
2012 }
2013
2014 static u_char
2015 ppc_io(device_t ppcdev, int iop, u_char *addr, int cnt, u_char byte)
2016 {
2017 struct ppc_data *ppc = DEVTOSOFTC(ppcdev);
2018 switch (iop) {
2019 case PPB_OUTSB_EPP:
2020 bus_space_write_multi_1(ppc->bst, ppc->bsh, PPC_EPP_DATA, addr, cnt);
2021 break;
2022 case PPB_OUTSW_EPP:
2023 bus_space_write_multi_2(ppc->bst, ppc->bsh, PPC_EPP_DATA, (u_int16_t *)addr, cnt);
2024 break;
2025 case PPB_OUTSL_EPP:
2026 bus_space_write_multi_4(ppc->bst, ppc->bsh, PPC_EPP_DATA, (u_int32_t *)addr, cnt);
2027 break;
2028 case PPB_INSB_EPP:
2029 bus_space_read_multi_1(ppc->bst, ppc->bsh, PPC_EPP_DATA, addr, cnt);
2030 break;
2031 case PPB_INSW_EPP:
2032 bus_space_read_multi_2(ppc->bst, ppc->bsh, PPC_EPP_DATA, (u_int16_t *)addr, cnt);
2033 break;
2034 case PPB_INSL_EPP:
2035 bus_space_read_multi_4(ppc->bst, ppc->bsh, PPC_EPP_DATA, (u_int32_t *)addr, cnt);
2036 break;
2037 case PPB_RDTR:
2038 return (r_dtr(ppc));
2039 break;
2040 case PPB_RSTR:
2041 return (r_str(ppc));
2042 break;
2043 case PPB_RCTR:
2044 return (r_ctr(ppc));
2045 break;
2046 case PPB_REPP_A:
2047 return (r_epp_A(ppc));
2048 break;
2049 case PPB_REPP_D:
2050 return (r_epp_D(ppc));
2051 break;
2052 case PPB_RECR:
2053 return (r_ecr(ppc));
2054 break;
2055 case PPB_RFIFO:
2056 return (r_fifo(ppc));
2057 break;
2058 case PPB_WDTR:
2059 w_dtr(ppc, byte);
2060 break;
2061 case PPB_WSTR:
2062 w_str(ppc, byte);
2063 break;
2064 case PPB_WCTR:
2065 w_ctr(ppc, byte);
2066 break;
2067 case PPB_WEPP_A:
2068 w_epp_A(ppc, byte);
2069 break;
2070 case PPB_WEPP_D:
2071 w_epp_D(ppc, byte);
2072 break;
2073 case PPB_WECR:
2074 w_ecr(ppc, byte);
2075 break;
2076 case PPB_WFIFO:
2077 w_fifo(ppc, byte);
2078 break;
2079 default:
2080 panic("%s: unknown I/O operation", __FUNCTION__);
2081 break;
2082 }
2083
2084 return (0); /* not significative */
2085 }
2086
2087 static int
2088 ppc_read_ivar(device_t bus, device_t dev, int index, uintptr_t *val)
2089 {
2090 struct ppc_data *ppc = (struct ppc_data *)device_get_softc(bus);
2091
2092 switch (index) {
2093 case PPC_IVAR_EPP_PROTO:
2094 *val = (u_long)ppc->ppc_epp;
2095 break;
2096 case PPC_IVAR_IRQ:
2097 *val = (u_long)ppc->ppc_irq;
2098 break;
2099 default:
2100 return (ENOENT);
2101 }
2102
2103 return (0);
2104 }
2105
2106 /*
2107 * Resource is useless here since ppbus devices' interrupt handlers are
2108 * multiplexed to the same resource initially allocated by ppc
2109 */
2110 static int
2111 ppc_setup_intr(device_t bus, device_t child, struct resource *r, int flags,
2112 void (*ihand)(void *), void *arg, void **cookiep)
2113 {
2114 int error;
2115 struct ppc_data *ppc = DEVTOSOFTC(bus);
2116
2117 if (ppc->ppc_registered) {
2118 /* XXX refuse registration if DMA is in progress */
2119
2120 /* first, unregister the default interrupt handler */
2121 if ((error = BUS_TEARDOWN_INTR(device_get_parent(bus),
2122 bus, ppc->res_irq, ppc->intr_cookie)))
2123 return (error);
2124
2125 /* bus_deactivate_resource(bus, SYS_RES_IRQ, ppc->rid_irq, */
2126 /* ppc->res_irq); */
2127
2128 /* DMA/FIFO operation won't be possible anymore */
2129 ppc->ppc_registered = 0;
2130 }
2131
2132 /* pass registration to the upper layer, ignore the incoming resource */
2133 return (BUS_SETUP_INTR(device_get_parent(bus), child,
2134 r, flags, ihand, arg, cookiep));
2135 }
2136
2137 /*
2138 * When no underlying device has a registered interrupt, register the ppc
2139 * layer one
2140 */
2141 static int
2142 ppc_teardown_intr(device_t bus, device_t child, struct resource *r, void *ih)
2143 {
2144 int error;
2145 struct ppc_data *ppc = DEVTOSOFTC(bus);
2146 device_t parent = device_get_parent(bus);
2147
2148 /* pass unregistration to the upper layer */
2149 if ((error = BUS_TEARDOWN_INTR(parent, child, r, ih)))
2150 return (error);
2151
2152 /* default to the tty mask for registration */ /* XXX */
2153 if (ppc->ppc_irq &&
2154 !(error = BUS_SETUP_INTR(parent, bus, ppc->res_irq,
2155 INTR_TYPE_TTY, ppcintr, bus, &ppc->intr_cookie))) {
2156
2157 /* remember the ppcintr is registered */
2158 ppc->ppc_registered = 1;
2159 }
2160
2161 return (error);
2162 }
2163
2164 DRIVER_MODULE(ppc, isa, ppc_driver, ppc_devclass, 0, 0);
Cache object: d2db2ff7b4bacfcb280a986009748045
|