tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * PReP pci functions.
3 * Originally by Gary Thomas
4 * rewritten and updated by Cort Dougan (cort@cs.nmt.edu)
5 *
6 * The motherboard routes/maps will disappear shortly. -- Cort
7 */
8
9#include <linux/types.h>
10#include <linux/pci.h>
11#include <linux/kernel.h>
12#include <linux/init.h>
13
14#include <asm/sections.h>
15#include <asm/byteorder.h>
16#include <asm/io.h>
17#include <asm/ptrace.h>
18#include <asm/prom.h>
19#include <asm/pci-bridge.h>
20#include <asm/residual.h>
21#include <asm/irq.h>
22#include <asm/machdep.h>
23#include <asm/open_pic.h>
24
25extern void (*setup_ibm_pci)(char *irq_lo, char *irq_hi);
26
27/* Which PCI interrupt line does a given device [slot] use? */
28/* Note: This really should be two dimensional based in slot/pin used */
29static unsigned char *Motherboard_map;
30unsigned char *Motherboard_map_name;
31
32/* How is the 82378 PIRQ mapping setup? */
33static unsigned char *Motherboard_routes;
34
35static void (*Motherboard_non0)(struct pci_dev *);
36
37static void Powerplus_Map_Non0(struct pci_dev *);
38
39/* Used for Motorola to store system config register */
40static unsigned long *ProcInfo;
41
42/* Tables for known hardware */
43
44/* Motorola PowerStackII - Utah */
45static char Utah_pci_IRQ_map[23] =
46{
47 0, /* Slot 0 - unused */
48 0, /* Slot 1 - unused */
49 5, /* Slot 2 - SCSI - NCR825A */
50 0, /* Slot 3 - unused */
51 3, /* Slot 4 - Ethernet - DEC2114x */
52 0, /* Slot 5 - unused */
53 2, /* Slot 6 - PCI Card slot #1 */
54 3, /* Slot 7 - PCI Card slot #2 */
55 5, /* Slot 8 - PCI Card slot #3 */
56 5, /* Slot 9 - PCI Bridge */
57 /* added here in case we ever support PCI bridges */
58 /* Secondary PCI bus cards are at slot-9,6 & slot-9,7 */
59 0, /* Slot 10 - unused */
60 0, /* Slot 11 - unused */
61 5, /* Slot 12 - SCSI - NCR825A */
62 0, /* Slot 13 - unused */
63 3, /* Slot 14 - enet */
64 0, /* Slot 15 - unused */
65 2, /* Slot 16 - unused */
66 3, /* Slot 17 - unused */
67 5, /* Slot 18 - unused */
68 0, /* Slot 19 - unused */
69 0, /* Slot 20 - unused */
70 0, /* Slot 21 - unused */
71 0, /* Slot 22 - unused */
72};
73
74static char Utah_pci_IRQ_routes[] =
75{
76 0, /* Line 0 - Unused */
77 9, /* Line 1 */
78 10, /* Line 2 */
79 11, /* Line 3 */
80 14, /* Line 4 */
81 15, /* Line 5 */
82};
83
84/* Motorola PowerStackII - Omaha */
85/* no integrated SCSI or ethernet */
86static char Omaha_pci_IRQ_map[23] =
87{
88 0, /* Slot 0 - unused */
89 0, /* Slot 1 - unused */
90 3, /* Slot 2 - Winbond EIDE */
91 0, /* Slot 3 - unused */
92 0, /* Slot 4 - unused */
93 0, /* Slot 5 - unused */
94 1, /* Slot 6 - PCI slot 1 */
95 2, /* Slot 7 - PCI slot 2 */
96 3, /* Slot 8 - PCI slot 3 */
97 4, /* Slot 9 - PCI slot 4 */ /* needs indirect access */
98 0, /* Slot 10 - unused */
99 0, /* Slot 11 - unused */
100 0, /* Slot 12 - unused */
101 0, /* Slot 13 - unused */
102 0, /* Slot 14 - unused */
103 0, /* Slot 15 - unused */
104 1, /* Slot 16 - PCI slot 1 */
105 2, /* Slot 17 - PCI slot 2 */
106 3, /* Slot 18 - PCI slot 3 */
107 4, /* Slot 19 - PCI slot 4 */ /* needs indirect access */
108 0,
109 0,
110 0,
111};
112
113static char Omaha_pci_IRQ_routes[] =
114{
115 0, /* Line 0 - Unused */
116 9, /* Line 1 */
117 11, /* Line 2 */
118 14, /* Line 3 */
119 15 /* Line 4 */
120};
121
122/* Motorola PowerStack */
123static char Blackhawk_pci_IRQ_map[19] =
124{
125 0, /* Slot 0 - unused */
126 0, /* Slot 1 - unused */
127 0, /* Slot 2 - unused */
128 0, /* Slot 3 - unused */
129 0, /* Slot 4 - unused */
130 0, /* Slot 5 - unused */
131 0, /* Slot 6 - unused */
132 0, /* Slot 7 - unused */
133 0, /* Slot 8 - unused */
134 0, /* Slot 9 - unused */
135 0, /* Slot 10 - unused */
136 0, /* Slot 11 - unused */
137 3, /* Slot 12 - SCSI */
138 0, /* Slot 13 - unused */
139 1, /* Slot 14 - Ethernet */
140 0, /* Slot 15 - unused */
141 1, /* Slot P7 */
142 2, /* Slot P6 */
143 3, /* Slot P5 */
144};
145
146static char Blackhawk_pci_IRQ_routes[] =
147{
148 0, /* Line 0 - Unused */
149 9, /* Line 1 */
150 11, /* Line 2 */
151 15, /* Line 3 */
152 15 /* Line 4 */
153};
154
155/* Motorola Mesquite */
156static char Mesquite_pci_IRQ_map[23] =
157{
158 0, /* Slot 0 - unused */
159 0, /* Slot 1 - unused */
160 0, /* Slot 2 - unused */
161 0, /* Slot 3 - unused */
162 0, /* Slot 4 - unused */
163 0, /* Slot 5 - unused */
164 0, /* Slot 6 - unused */
165 0, /* Slot 7 - unused */
166 0, /* Slot 8 - unused */
167 0, /* Slot 9 - unused */
168 0, /* Slot 10 - unused */
169 0, /* Slot 11 - unused */
170 0, /* Slot 12 - unused */
171 0, /* Slot 13 - unused */
172 2, /* Slot 14 - Ethernet */
173 0, /* Slot 15 - unused */
174 3, /* Slot 16 - PMC */
175 0, /* Slot 17 - unused */
176 0, /* Slot 18 - unused */
177 0, /* Slot 19 - unused */
178 0, /* Slot 20 - unused */
179 0, /* Slot 21 - unused */
180 0, /* Slot 22 - unused */
181};
182
183/* Motorola Sitka */
184static char Sitka_pci_IRQ_map[21] =
185{
186 0, /* Slot 0 - unused */
187 0, /* Slot 1 - unused */
188 0, /* Slot 2 - unused */
189 0, /* Slot 3 - unused */
190 0, /* Slot 4 - unused */
191 0, /* Slot 5 - unused */
192 0, /* Slot 6 - unused */
193 0, /* Slot 7 - unused */
194 0, /* Slot 8 - unused */
195 0, /* Slot 9 - unused */
196 0, /* Slot 10 - unused */
197 0, /* Slot 11 - unused */
198 0, /* Slot 12 - unused */
199 0, /* Slot 13 - unused */
200 2, /* Slot 14 - Ethernet */
201 0, /* Slot 15 - unused */
202 9, /* Slot 16 - PMC 1 */
203 12, /* Slot 17 - PMC 2 */
204 0, /* Slot 18 - unused */
205 0, /* Slot 19 - unused */
206 4, /* Slot 20 - NT P2P bridge */
207};
208
209/* Motorola MTX */
210static char MTX_pci_IRQ_map[23] =
211{
212 0, /* Slot 0 - unused */
213 0, /* Slot 1 - unused */
214 0, /* Slot 2 - unused */
215 0, /* Slot 3 - unused */
216 0, /* Slot 4 - unused */
217 0, /* Slot 5 - unused */
218 0, /* Slot 6 - unused */
219 0, /* Slot 7 - unused */
220 0, /* Slot 8 - unused */
221 0, /* Slot 9 - unused */
222 0, /* Slot 10 - unused */
223 0, /* Slot 11 - unused */
224 3, /* Slot 12 - SCSI */
225 0, /* Slot 13 - unused */
226 2, /* Slot 14 - Ethernet */
227 0, /* Slot 15 - unused */
228 9, /* Slot 16 - PCI/PMC slot 1 */
229 10, /* Slot 17 - PCI/PMC slot 2 */
230 11, /* Slot 18 - PCI slot 3 */
231 0, /* Slot 19 - unused */
232 0, /* Slot 20 - unused */
233 0, /* Slot 21 - unused */
234 0, /* Slot 22 - unused */
235};
236
237/* Motorola MTX Plus */
238/* Secondary bus interrupt routing is not supported yet */
239static char MTXplus_pci_IRQ_map[23] =
240{
241 0, /* Slot 0 - unused */
242 0, /* Slot 1 - unused */
243 0, /* Slot 2 - unused */
244 0, /* Slot 3 - unused */
245 0, /* Slot 4 - unused */
246 0, /* Slot 5 - unused */
247 0, /* Slot 6 - unused */
248 0, /* Slot 7 - unused */
249 0, /* Slot 8 - unused */
250 0, /* Slot 9 - unused */
251 0, /* Slot 10 - unused */
252 0, /* Slot 11 - unused */
253 3, /* Slot 12 - SCSI */
254 0, /* Slot 13 - unused */
255 2, /* Slot 14 - Ethernet 1 */
256 0, /* Slot 15 - unused */
257 9, /* Slot 16 - PCI slot 1P */
258 10, /* Slot 17 - PCI slot 2P */
259 11, /* Slot 18 - PCI slot 3P */
260 10, /* Slot 19 - Ethernet 2 */
261 0, /* Slot 20 - P2P Bridge */
262 0, /* Slot 21 - unused */
263 0, /* Slot 22 - unused */
264};
265
266static char Raven_pci_IRQ_routes[] =
267{
268 0, /* This is a dummy structure */
269};
270
271/* Motorola MVME16xx */
272static char Genesis_pci_IRQ_map[16] =
273{
274 0, /* Slot 0 - unused */
275 0, /* Slot 1 - unused */
276 0, /* Slot 2 - unused */
277 0, /* Slot 3 - unused */
278 0, /* Slot 4 - unused */
279 0, /* Slot 5 - unused */
280 0, /* Slot 6 - unused */
281 0, /* Slot 7 - unused */
282 0, /* Slot 8 - unused */
283 0, /* Slot 9 - unused */
284 0, /* Slot 10 - unused */
285 0, /* Slot 11 - unused */
286 3, /* Slot 12 - SCSI */
287 0, /* Slot 13 - unused */
288 1, /* Slot 14 - Ethernet */
289 0, /* Slot 15 - unused */
290};
291
292static char Genesis_pci_IRQ_routes[] =
293{
294 0, /* Line 0 - Unused */
295 10, /* Line 1 */
296 11, /* Line 2 */
297 14, /* Line 3 */
298 15 /* Line 4 */
299};
300
301static char Genesis2_pci_IRQ_map[23] =
302{
303 0, /* Slot 0 - unused */
304 0, /* Slot 1 - unused */
305 0, /* Slot 2 - unused */
306 0, /* Slot 3 - unused */
307 0, /* Slot 4 - unused */
308 0, /* Slot 5 - unused */
309 0, /* Slot 6 - unused */
310 0, /* Slot 7 - unused */
311 0, /* Slot 8 - unused */
312 0, /* Slot 9 - unused */
313 0, /* Slot 10 - unused */
314 0, /* Slot 11 - IDE */
315 3, /* Slot 12 - SCSI */
316 5, /* Slot 13 - Universe PCI - VME Bridge */
317 2, /* Slot 14 - Ethernet */
318 0, /* Slot 15 - unused */
319 9, /* Slot 16 - PMC 1 */
320 12, /* Slot 17 - pci */
321 11, /* Slot 18 - pci */
322 10, /* Slot 19 - pci */
323 0, /* Slot 20 - pci */
324 0, /* Slot 21 - unused */
325 0, /* Slot 22 - unused */
326};
327
328/* Motorola Series-E */
329static char Comet_pci_IRQ_map[23] =
330{
331 0, /* Slot 0 - unused */
332 0, /* Slot 1 - unused */
333 0, /* Slot 2 - unused */
334 0, /* Slot 3 - unused */
335 0, /* Slot 4 - unused */
336 0, /* Slot 5 - unused */
337 0, /* Slot 6 - unused */
338 0, /* Slot 7 - unused */
339 0, /* Slot 8 - unused */
340 0, /* Slot 9 - unused */
341 0, /* Slot 10 - unused */
342 0, /* Slot 11 - unused */
343 3, /* Slot 12 - SCSI */
344 0, /* Slot 13 - unused */
345 1, /* Slot 14 - Ethernet */
346 0, /* Slot 15 - unused */
347 1, /* Slot 16 - PCI slot 1 */
348 2, /* Slot 17 - PCI slot 2 */
349 3, /* Slot 18 - PCI slot 3 */
350 4, /* Slot 19 - PCI bridge */
351 0,
352 0,
353 0,
354};
355
356static char Comet_pci_IRQ_routes[] =
357{
358 0, /* Line 0 - Unused */
359 10, /* Line 1 */
360 11, /* Line 2 */
361 14, /* Line 3 */
362 15 /* Line 4 */
363};
364
365/* Motorola Series-EX */
366static char Comet2_pci_IRQ_map[23] =
367{
368 0, /* Slot 0 - unused */
369 0, /* Slot 1 - unused */
370 3, /* Slot 2 - SCSI - NCR825A */
371 0, /* Slot 3 - unused */
372 1, /* Slot 4 - Ethernet - DEC2104X */
373 0, /* Slot 5 - unused */
374 1, /* Slot 6 - PCI slot 1 */
375 2, /* Slot 7 - PCI slot 2 */
376 3, /* Slot 8 - PCI slot 3 */
377 4, /* Slot 9 - PCI bridge */
378 0, /* Slot 10 - unused */
379 0, /* Slot 11 - unused */
380 3, /* Slot 12 - SCSI - NCR825A */
381 0, /* Slot 13 - unused */
382 1, /* Slot 14 - Ethernet - DEC2104X */
383 0, /* Slot 15 - unused */
384 1, /* Slot 16 - PCI slot 1 */
385 2, /* Slot 17 - PCI slot 2 */
386 3, /* Slot 18 - PCI slot 3 */
387 4, /* Slot 19 - PCI bridge */
388 0,
389 0,
390 0,
391};
392
393static char Comet2_pci_IRQ_routes[] =
394{
395 0, /* Line 0 - Unused */
396 10, /* Line 1 */
397 11, /* Line 2 */
398 14, /* Line 3 */
399 15, /* Line 4 */
400};
401
402/*
403 * ibm 830 (and 850?).
404 * This is actually based on the Carolina motherboard
405 * -- Cort
406 */
407static char ibm8xx_pci_IRQ_map[23] = {
408 0, /* Slot 0 - unused */
409 0, /* Slot 1 - unused */
410 0, /* Slot 2 - unused */
411 0, /* Slot 3 - unused */
412 0, /* Slot 4 - unused */
413 0, /* Slot 5 - unused */
414 0, /* Slot 6 - unused */
415 0, /* Slot 7 - unused */
416 0, /* Slot 8 - unused */
417 0, /* Slot 9 - unused */
418 0, /* Slot 10 - unused */
419 0, /* Slot 11 - FireCoral */
420 4, /* Slot 12 - Ethernet PCIINTD# */
421 2, /* Slot 13 - PCI Slot #2 */
422 2, /* Slot 14 - S3 Video PCIINTD# */
423 0, /* Slot 15 - onboard SCSI (INDI) [1] */
424 3, /* Slot 16 - NCR58C810 RS6000 Only PCIINTC# */
425 0, /* Slot 17 - unused */
426 2, /* Slot 18 - PCI Slot 2 PCIINTx# (See below) */
427 0, /* Slot 19 - unused */
428 0, /* Slot 20 - unused */
429 0, /* Slot 21 - unused */
430 2, /* Slot 22 - PCI slot 1 PCIINTx# (See below) */
431};
432
433static char ibm8xx_pci_IRQ_routes[] = {
434 0, /* Line 0 - unused */
435 15, /* Line 1 */
436 15, /* Line 2 */
437 15, /* Line 3 */
438 15, /* Line 4 */
439};
440
441/*
442 * a 6015 ibm board
443 * -- Cort
444 */
445static char ibm6015_pci_IRQ_map[23] = {
446 0, /* Slot 0 - unused */
447 0, /* Slot 1 - unused */
448 0, /* Slot 2 - unused */
449 0, /* Slot 3 - unused */
450 0, /* Slot 4 - unused */
451 0, /* Slot 5 - unused */
452 0, /* Slot 6 - unused */
453 0, /* Slot 7 - unused */
454 0, /* Slot 8 - unused */
455 0, /* Slot 9 - unused */
456 0, /* Slot 10 - unused */
457 0, /* Slot 11 - */
458 1, /* Slot 12 - SCSI */
459 2, /* Slot 13 - */
460 2, /* Slot 14 - */
461 1, /* Slot 15 - */
462 1, /* Slot 16 - */
463 0, /* Slot 17 - */
464 2, /* Slot 18 - */
465 0, /* Slot 19 - */
466 0, /* Slot 20 - */
467 0, /* Slot 21 - */
468 2, /* Slot 22 - */
469};
470
471static char ibm6015_pci_IRQ_routes[] = {
472 0, /* Line 0 - unused */
473 13, /* Line 1 */
474 15, /* Line 2 */
475 15, /* Line 3 */
476 15, /* Line 4 */
477};
478
479
480/* IBM Nobis and Thinkpad 850 */
481static char Nobis_pci_IRQ_map[23] ={
482 0, /* Slot 0 - unused */
483 0, /* Slot 1 - unused */
484 0, /* Slot 2 - unused */
485 0, /* Slot 3 - unused */
486 0, /* Slot 4 - unused */
487 0, /* Slot 5 - unused */
488 0, /* Slot 6 - unused */
489 0, /* Slot 7 - unused */
490 0, /* Slot 8 - unused */
491 0, /* Slot 9 - unused */
492 0, /* Slot 10 - unused */
493 0, /* Slot 11 - unused */
494 3, /* Slot 12 - SCSI */
495 0, /* Slot 13 - unused */
496 0, /* Slot 14 - unused */
497 0, /* Slot 15 - unused */
498};
499
500static char Nobis_pci_IRQ_routes[] = {
501 0, /* Line 0 - Unused */
502 13, /* Line 1 */
503 13, /* Line 2 */
504 13, /* Line 3 */
505 13 /* Line 4 */
506};
507
508/*
509 * IBM RS/6000 43p/140 -- paulus
510 * XXX we should get all this from the residual data
511 */
512static char ibm43p_pci_IRQ_map[23] = {
513 0, /* Slot 0 - unused */
514 0, /* Slot 1 - unused */
515 0, /* Slot 2 - unused */
516 0, /* Slot 3 - unused */
517 0, /* Slot 4 - unused */
518 0, /* Slot 5 - unused */
519 0, /* Slot 6 - unused */
520 0, /* Slot 7 - unused */
521 0, /* Slot 8 - unused */
522 0, /* Slot 9 - unused */
523 0, /* Slot 10 - unused */
524 0, /* Slot 11 - FireCoral ISA bridge */
525 6, /* Slot 12 - Ethernet */
526 0, /* Slot 13 - openpic */
527 0, /* Slot 14 - unused */
528 0, /* Slot 15 - unused */
529 7, /* Slot 16 - NCR58C825a onboard scsi */
530 0, /* Slot 17 - unused */
531 2, /* Slot 18 - PCI Slot 2 PCIINTx# (See below) */
532 0, /* Slot 19 - unused */
533 0, /* Slot 20 - unused */
534 0, /* Slot 21 - unused */
535 1, /* Slot 22 - PCI slot 1 PCIINTx# (See below) */
536};
537
538static char ibm43p_pci_IRQ_routes[] = {
539 0, /* Line 0 - unused */
540 15, /* Line 1 */
541 15, /* Line 2 */
542 15, /* Line 3 */
543 15, /* Line 4 */
544};
545
546/* Motorola PowerPlus architecture PCI IRQ tables */
547/* Interrupt line values for INTA-D on primary/secondary MPIC inputs */
548
549struct powerplus_irq_list
550{
551 unsigned char primary[4]; /* INT A-D */
552 unsigned char secondary[4]; /* INT A-D */
553};
554
555/*
556 * For standard PowerPlus boards, bus 0 PCI INTs A-D are routed to
557 * OpenPIC inputs 9-12. PCI INTs A-D from the on board P2P bridge
558 * are routed to OpenPIC inputs 5-8. These values are offset by
559 * 16 in the table to reflect the Linux kernel interrupt value.
560 */
561struct powerplus_irq_list Powerplus_pci_IRQ_list =
562{
563 {25, 26, 27, 28},
564 {21, 22, 23, 24}
565};
566
567/*
568 * For the MCP750 (system slot board), cPCI INTs A-D are routed to
569 * OpenPIC inputs 8-11 and the PMC INTs A-D are routed to OpenPIC
570 * input 3. On a hot swap MCP750, the companion card PCI INTs A-D
571 * are routed to OpenPIC inputs 12-15. These values are offset by
572 * 16 in the table to reflect the Linux kernel interrupt value.
573 */
574struct powerplus_irq_list Mesquite_pci_IRQ_list =
575{
576 {24, 25, 26, 27},
577 {28, 29, 30, 31}
578};
579
580/*
581 * This table represents the standard PCI swizzle defined in the
582 * PCI bus specification.
583 */
584static unsigned char prep_pci_intpins[4][4] =
585{
586 { 1, 2, 3, 4}, /* Buses 0, 4, 8, ... */
587 { 2, 3, 4, 1}, /* Buses 1, 5, 9, ... */
588 { 3, 4, 1, 2}, /* Buses 2, 6, 10 ... */
589 { 4, 1, 2, 3}, /* Buses 3, 7, 11 ... */
590};
591
592/* We have to turn on LEVEL mode for changed IRQ's */
593/* All PCI IRQ's need to be level mode, so this should be something
594 * other than hard-coded as well... IRQ's are individually mappable
595 * to either edge or level.
596 */
597
598/*
599 * 8259 edge/level control definitions
600 */
601#define ISA8259_M_ELCR 0x4d0
602#define ISA8259_S_ELCR 0x4d1
603
604#define ELCRS_INT15_LVL 0x80
605#define ELCRS_INT14_LVL 0x40
606#define ELCRS_INT12_LVL 0x10
607#define ELCRS_INT11_LVL 0x08
608#define ELCRS_INT10_LVL 0x04
609#define ELCRS_INT9_LVL 0x02
610#define ELCRS_INT8_LVL 0x01
611#define ELCRM_INT7_LVL 0x80
612#define ELCRM_INT5_LVL 0x20
613
614#if 0
615/*
616 * PCI config space access.
617 */
618#define CFGADDR(dev) ((1<<(dev>>3)) | ((dev&7)<<8))
619#define DEVNO(dev) (dev>>3)
620
621#define MIN_DEVNR 11
622#define MAX_DEVNR 22
623
624static int
625prep_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
626 int len, u32 *val)
627{
628 struct pci_controller *hose = bus->sysdata;
629 volatile void __iomem *cfg_data;
630
631 if (bus->number != 0 || DEVNO(devfn) < MIN_DEVNR
632 || DEVNO(devfn) > MAX_DEVNR)
633 return PCIBIOS_DEVICE_NOT_FOUND;
634
635 /*
636 * Note: the caller has already checked that offset is
637 * suitably aligned and that len is 1, 2 or 4.
638 */
639 cfg_data = hose->cfg_data + CFGADDR(devfn) + offset;
640 switch (len) {
641 case 1:
642 *val = in_8(cfg_data);
643 break;
644 case 2:
645 *val = in_le16(cfg_data);
646 break;
647 default:
648 *val = in_le32(cfg_data);
649 break;
650 }
651 return PCIBIOS_SUCCESSFUL;
652}
653
654static int
655prep_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
656 int len, u32 val)
657{
658 struct pci_controller *hose = bus->sysdata;
659 volatile void __iomem *cfg_data;
660
661 if (bus->number != 0 || DEVNO(devfn) < MIN_DEVNR
662 || DEVNO(devfn) > MAX_DEVNR)
663 return PCIBIOS_DEVICE_NOT_FOUND;
664
665 /*
666 * Note: the caller has already checked that offset is
667 * suitably aligned and that len is 1, 2 or 4.
668 */
669 cfg_data = hose->cfg_data + CFGADDR(devfn) + offset;
670 switch (len) {
671 case 1:
672 out_8(cfg_data, val);
673 break;
674 case 2:
675 out_le16(cfg_data, val);
676 break;
677 default:
678 out_le32(cfg_data, val);
679 break;
680 }
681 return PCIBIOS_SUCCESSFUL;
682}
683
684static struct pci_ops prep_pci_ops =
685{
686 prep_read_config,
687 prep_write_config
688};
689#endif
690
691#define MOTOROLA_CPUTYPE_REG 0x800
692#define MOTOROLA_BASETYPE_REG 0x803
693#define MPIC_RAVEN_ID 0x48010000
694#define MPIC_HAWK_ID 0x48030000
695#define MOT_PROC2_BIT 0x800
696
697static u_char prep_openpic_initsenses[] __initdata = {
698 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* MVME2600_INT_SIO */
699 (IRQ_SENSE_EDGE | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_FALCN_ECC_ERR */
700 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_ETHERNET */
701 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_SCSI */
702 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_GRAPHICS */
703 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_VME0 */
704 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_VME1 */
705 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_VME2 */
706 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_VME3 */
707 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_INTA */
708 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_INTB */
709 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_INTC */
710 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_PCI_INTD */
711 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_LM_SIG0 */
712 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* MVME2600_INT_LM_SIG1 */
713};
714
715#define MOT_RAVEN_PRESENT 0x1
716#define MOT_HAWK_PRESENT 0x2
717
718int mot_entry = -1;
719int prep_keybd_present = 1;
720int MotMPIC;
721int mot_multi;
722
723int __init
724raven_init(void)
725{
726 unsigned int devid;
727 unsigned int pci_membase;
728 unsigned char base_mod;
729
730 /* Check to see if the Raven chip exists. */
731 if ( _prep_type != _PREP_Motorola) {
732 OpenPIC_Addr = NULL;
733 return 0;
734 }
735
736 /* Check to see if this board is a type that might have a Raven. */
737 if ((inb(MOTOROLA_CPUTYPE_REG) & 0xF0) != 0xE0) {
738 OpenPIC_Addr = NULL;
739 return 0;
740 }
741
742 /* Check the first PCI device to see if it is a Raven. */
743 early_read_config_dword(NULL, 0, 0, PCI_VENDOR_ID, &devid);
744
745 switch (devid & 0xffff0000) {
746 case MPIC_RAVEN_ID:
747 MotMPIC = MOT_RAVEN_PRESENT;
748 break;
749 case MPIC_HAWK_ID:
750 MotMPIC = MOT_HAWK_PRESENT;
751 break;
752 default:
753 OpenPIC_Addr = NULL;
754 return 0;
755 }
756
757
758 /* Read the memory base register. */
759 early_read_config_dword(NULL, 0, 0, PCI_BASE_ADDRESS_1, &pci_membase);
760
761 if (pci_membase == 0) {
762 OpenPIC_Addr = NULL;
763 return 0;
764 }
765
766 /* Map the Raven MPIC registers to virtual memory. */
767 OpenPIC_Addr = ioremap(pci_membase+0xC0000000, 0x22000);
768
769 OpenPIC_InitSenses = prep_openpic_initsenses;
770 OpenPIC_NumInitSenses = sizeof(prep_openpic_initsenses);
771
772 ppc_md.get_irq = openpic_get_irq;
773
774 /* If raven is present on Motorola store the system config register
775 * for later use.
776 */
777 ProcInfo = (unsigned long *)ioremap(0xfef80400, 4);
778
779 /* Indicate to system if this is a multiprocessor board */
780 if (!(*ProcInfo & MOT_PROC2_BIT)) {
781 mot_multi = 1;
782 }
783
784 /* This is a hack. If this is a 2300 or 2400 mot board then there is
785 * no keyboard controller and we have to indicate that.
786 */
787 base_mod = inb(MOTOROLA_BASETYPE_REG);
788 if ((MotMPIC == MOT_HAWK_PRESENT) || (base_mod == 0xF9) ||
789 (base_mod == 0xFA) || (base_mod == 0xE1))
790 prep_keybd_present = 0;
791
792 return 1;
793}
794
795struct mot_info {
796 int cpu_type; /* 0x100 mask assumes for Raven and Hawk boards that the level/edge are set */
797 /* 0x200 if this board has a Hawk chip. */
798 int base_type;
799 int max_cpu; /* ored with 0x80 if this board should be checked for multi CPU */
800 const char *name;
801 unsigned char *map;
802 unsigned char *routes;
803 void (*map_non0_bus)(struct pci_dev *); /* For boards with more than bus 0 devices. */
804 struct powerplus_irq_list *pci_irq_list; /* List of PCI MPIC inputs */
805 unsigned char secondary_bridge_devfn; /* devfn of secondary bus transparent bridge */
806} mot_info[] = {
807 {0x300, 0x00, 0x00, "MVME 2400", Genesis2_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0xFF},
808 {0x010, 0x00, 0x00, "Genesis", Genesis_pci_IRQ_map, Genesis_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0x00},
809 {0x020, 0x00, 0x00, "Powerstack (Series E)", Comet_pci_IRQ_map, Comet_pci_IRQ_routes, NULL, NULL, 0x00},
810 {0x040, 0x00, 0x00, "Blackhawk (Powerstack)", Blackhawk_pci_IRQ_map, Blackhawk_pci_IRQ_routes, NULL, NULL, 0x00},
811 {0x050, 0x00, 0x00, "Omaha (PowerStack II Pro3000)", Omaha_pci_IRQ_map, Omaha_pci_IRQ_routes, NULL, NULL, 0x00},
812 {0x060, 0x00, 0x00, "Utah (Powerstack II Pro4000)", Utah_pci_IRQ_map, Utah_pci_IRQ_routes, NULL, NULL, 0x00},
813 {0x0A0, 0x00, 0x00, "Powerstack (Series EX)", Comet2_pci_IRQ_map, Comet2_pci_IRQ_routes, NULL, NULL, 0x00},
814 {0x1E0, 0xE0, 0x00, "Mesquite cPCI (MCP750)", Mesquite_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Mesquite_pci_IRQ_list, 0xFF},
815 {0x1E0, 0xE1, 0x00, "Sitka cPCI (MCPN750)", Sitka_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0xFF},
816 {0x1E0, 0xE2, 0x00, "Mesquite cPCI (MCP750) w/ HAC", Mesquite_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Mesquite_pci_IRQ_list, 0xC0},
817 {0x1E0, 0xF6, 0x80, "MTX Plus", MTXplus_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0xA0},
818 {0x1E0, 0xF6, 0x81, "Dual MTX Plus", MTXplus_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0xA0},
819 {0x1E0, 0xF7, 0x80, "MTX wo/ Parallel Port", MTX_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0x00},
820 {0x1E0, 0xF7, 0x81, "Dual MTX wo/ Parallel Port", MTX_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0x00},
821 {0x1E0, 0xF8, 0x80, "MTX w/ Parallel Port", MTX_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0x00},
822 {0x1E0, 0xF8, 0x81, "Dual MTX w/ Parallel Port", MTX_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0x00},
823 {0x1E0, 0xF9, 0x00, "MVME 2300", Genesis2_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0xFF},
824 {0x1E0, 0xFA, 0x00, "MVME 2300SC/2600", Genesis2_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0xFF},
825 {0x1E0, 0xFB, 0x00, "MVME 2600 with MVME712M", Genesis2_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0xFF},
826 {0x1E0, 0xFC, 0x00, "MVME 2600/2700 with MVME761", Genesis2_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0xFF},
827 {0x1E0, 0xFD, 0x80, "MVME 3600 with MVME712M", Genesis2_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0x00},
828 {0x1E0, 0xFD, 0x81, "MVME 4600 with MVME712M", Genesis2_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0xFF},
829 {0x1E0, 0xFE, 0x80, "MVME 3600 with MVME761", Genesis2_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0xFF},
830 {0x1E0, 0xFE, 0x81, "MVME 4600 with MVME761", Genesis2_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0xFF},
831 {0x1E0, 0xFF, 0x00, "MVME 1600-001 or 1600-011", Genesis2_pci_IRQ_map, Raven_pci_IRQ_routes, Powerplus_Map_Non0, &Powerplus_pci_IRQ_list, 0xFF},
832 {0x000, 0x00, 0x00, "", NULL, NULL, NULL, NULL, 0x00}
833};
834
835void __init
836ibm_prep_init(void)
837{
838 if (have_residual_data) {
839 u32 addr, real_addr, len, offset;
840 PPC_DEVICE *mpic;
841 PnP_TAG_PACKET *pkt;
842
843 /* Use the PReP residual data to determine if an OpenPIC is
844 * present. If so, get the large vendor packet which will
845 * tell us the base address and length in memory.
846 * If we are successful, ioremap the memory area and set
847 * OpenPIC_Addr (this indicates that the OpenPIC was found).
848 */
849 mpic = residual_find_device(-1, NULL, SystemPeripheral,
850 ProgrammableInterruptController, MPIC, 0);
851 if (!mpic)
852 return;
853
854 pkt = PnP_find_large_vendor_packet(res->DevicePnPHeap +
855 mpic->AllocatedOffset, 9, 0);
856
857 if (!pkt)
858 return;
859
860#define p pkt->L4_Pack.L4_Data.L4_PPCPack
861 if (p.PPCData[1] == 32) {
862 switch (p.PPCData[0]) {
863 case 1: offset = PREP_ISA_IO_BASE; break;
864 case 2: offset = PREP_ISA_MEM_BASE; break;
865 default: return; /* Not I/O or memory?? */
866 }
867 }
868 else
869 return; /* Not a 32-bit address */
870
871 real_addr = ld_le32((unsigned int *) (p.PPCData + 4));
872 if (real_addr == 0xffffffff)
873 return;
874
875 /* Adjust address to be as seen by CPU */
876 addr = real_addr + offset;
877
878 len = ld_le32((unsigned int *) (p.PPCData + 12));
879 if (!len)
880 return;
881#undef p
882 OpenPIC_Addr = ioremap(addr, len);
883 ppc_md.get_irq = openpic_get_irq;
884
885 OpenPIC_InitSenses = prep_openpic_initsenses;
886 OpenPIC_NumInitSenses = sizeof(prep_openpic_initsenses);
887
888 printk(KERN_INFO "MPIC at 0x%08x (0x%08x), length 0x%08x "
889 "mapped to 0x%p\n", addr, real_addr, len, OpenPIC_Addr);
890 }
891}
892
893static void __init
894ibm43p_pci_map_non0(struct pci_dev *dev)
895{
896 unsigned char intpin;
897 static unsigned char bridge_intrs[4] = { 3, 4, 5, 8 };
898
899 if (dev == NULL)
900 return;
901 pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &intpin);
902 if (intpin < 1 || intpin > 4)
903 return;
904 intpin = (PCI_SLOT(dev->devfn) + intpin - 1) & 3;
905 dev->irq = openpic_to_irq(bridge_intrs[intpin]);
906 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
907}
908
909void __init
910prep_residual_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi)
911{
912 if (have_residual_data) {
913 Motherboard_map_name = res->VitalProductData.PrintableModel;
914 Motherboard_map = NULL;
915 Motherboard_routes = NULL;
916 residual_irq_mask(irq_edge_mask_lo, irq_edge_mask_hi);
917 }
918}
919
920void __init
921prep_sandalfoot_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi)
922{
923 Motherboard_map_name = "IBM 6015/7020 (Sandalfoot/Sandalbow)";
924 Motherboard_map = ibm6015_pci_IRQ_map;
925 Motherboard_routes = ibm6015_pci_IRQ_routes;
926 *irq_edge_mask_lo = 0x00; /* irq's 0-7 all edge-triggered */
927 *irq_edge_mask_hi = 0xA0; /* irq's 13, 15 level-triggered */
928}
929
930void __init
931prep_thinkpad_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi)
932{
933 Motherboard_map_name = "IBM Thinkpad 850/860";
934 Motherboard_map = Nobis_pci_IRQ_map;
935 Motherboard_routes = Nobis_pci_IRQ_routes;
936 *irq_edge_mask_lo = 0x00; /* irq's 0-7 all edge-triggered */
937 *irq_edge_mask_hi = 0xA0; /* irq's 13, 15 level-triggered */
938}
939
940void __init
941prep_carolina_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi)
942{
943 Motherboard_map_name = "IBM 7248, PowerSeries 830/850 (Carolina)";
944 Motherboard_map = ibm8xx_pci_IRQ_map;
945 Motherboard_routes = ibm8xx_pci_IRQ_routes;
946 *irq_edge_mask_lo = 0x00; /* irq's 0-7 all edge-triggered */
947 *irq_edge_mask_hi = 0xA4; /* irq's 10, 13, 15 level-triggered */
948}
949
950void __init
951prep_tiger1_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi)
952{
953 Motherboard_map_name = "IBM 43P-140 (Tiger1)";
954 Motherboard_map = ibm43p_pci_IRQ_map;
955 Motherboard_routes = ibm43p_pci_IRQ_routes;
956 Motherboard_non0 = ibm43p_pci_map_non0;
957 *irq_edge_mask_lo = 0x00; /* irq's 0-7 all edge-triggered */
958 *irq_edge_mask_hi = 0xA0; /* irq's 13, 15 level-triggered */
959}
960
961void __init
962prep_route_pci_interrupts(void)
963{
964 unsigned char *ibc_pirq = (unsigned char *)0x80800860;
965 unsigned char *ibc_pcicon = (unsigned char *)0x80800840;
966 int i;
967
968 if ( _prep_type == _PREP_Motorola)
969 {
970 unsigned short irq_mode;
971 unsigned char cpu_type;
972 unsigned char base_mod;
973 int entry;
974
975 cpu_type = inb(MOTOROLA_CPUTYPE_REG) & 0xF0;
976 base_mod = inb(MOTOROLA_BASETYPE_REG);
977
978 for (entry = 0; mot_info[entry].cpu_type != 0; entry++) {
979 if (mot_info[entry].cpu_type & 0x200) { /* Check for Hawk chip */
980 if (!(MotMPIC & MOT_HAWK_PRESENT))
981 continue;
982 } else { /* Check non hawk boards */
983 if ((mot_info[entry].cpu_type & 0xff) != cpu_type)
984 continue;
985
986 if (mot_info[entry].base_type == 0) {
987 mot_entry = entry;
988 break;
989 }
990
991 if (mot_info[entry].base_type != base_mod)
992 continue;
993 }
994
995 if (!(mot_info[entry].max_cpu & 0x80)) {
996 mot_entry = entry;
997 break;
998 }
999
1000 /* processor 1 not present and max processor zero indicated */
1001 if ((*ProcInfo & MOT_PROC2_BIT) && !(mot_info[entry].max_cpu & 0x7f)) {
1002 mot_entry = entry;
1003 break;
1004 }
1005
1006 /* processor 1 present and max processor zero indicated */
1007 if (!(*ProcInfo & MOT_PROC2_BIT) && (mot_info[entry].max_cpu & 0x7f)) {
1008 mot_entry = entry;
1009 break;
1010 }
1011 }
1012
1013 if (mot_entry == -1) /* No particular cpu type found - assume Blackhawk */
1014 mot_entry = 3;
1015
1016 Motherboard_map_name = (unsigned char *)mot_info[mot_entry].name;
1017 Motherboard_map = mot_info[mot_entry].map;
1018 Motherboard_routes = mot_info[mot_entry].routes;
1019 Motherboard_non0 = mot_info[mot_entry].map_non0_bus;
1020
1021 if (!(mot_info[entry].cpu_type & 0x100)) {
1022 /* AJF adjust level/edge control according to routes */
1023 irq_mode = 0;
1024 for (i = 1; i <= 4; i++)
1025 irq_mode |= ( 1 << Motherboard_routes[i] );
1026 outb( irq_mode & 0xff, 0x4d0 );
1027 outb( (irq_mode >> 8) & 0xff, 0x4d1 );
1028 }
1029 } else if ( _prep_type == _PREP_IBM ) {
1030 unsigned char irq_edge_mask_lo, irq_edge_mask_hi;
1031 unsigned short irq_edge_mask;
1032 int i;
1033
1034 setup_ibm_pci(&irq_edge_mask_lo, &irq_edge_mask_hi);
1035
1036 outb(inb(0x04d0)|irq_edge_mask_lo, 0x4d0); /* primary 8259 */
1037 outb(inb(0x04d1)|irq_edge_mask_hi, 0x4d1); /* cascaded 8259 */
1038
1039 irq_edge_mask = (irq_edge_mask_hi << 8) | irq_edge_mask_lo;
1040 for (i = 0; i < 16; ++i, irq_edge_mask >>= 1)
1041 if (irq_edge_mask & 1)
1042 irq_desc[i].status |= IRQ_LEVEL;
1043 } else {
1044 printk("No known machine pci routing!\n");
1045 return;
1046 }
1047
1048 /* Set up mapping from slots */
1049 if (Motherboard_routes) {
1050 for (i = 1; i <= 4; i++)
1051 ibc_pirq[i-1] = Motherboard_routes[i];
1052
1053 /* Enable PCI interrupts */
1054 *ibc_pcicon |= 0x20;
1055 }
1056}
1057
1058void __init
1059prep_pib_init(void)
1060{
1061 unsigned char reg;
1062 unsigned short short_reg;
1063
1064 struct pci_dev *dev = NULL;
1065
1066 if (( _prep_type == _PREP_Motorola) && (OpenPIC_Addr)) {
1067 /*
1068 * Perform specific configuration for the Via Tech or
1069 * or Winbond PCI-ISA-Bridge part.
1070 */
1071 if ((dev = pci_get_device(PCI_VENDOR_ID_VIA,
1072 PCI_DEVICE_ID_VIA_82C586_1, dev))) {
1073 /*
1074 * PPCBUG does not set the enable bits
1075 * for the IDE device. Force them on here.
1076 */
1077 pci_read_config_byte(dev, 0x40, ®);
1078
1079 reg |= 0x03; /* IDE: Chip Enable Bits */
1080 pci_write_config_byte(dev, 0x40, reg);
1081 }
1082 if ((dev = pci_get_device(PCI_VENDOR_ID_VIA,
1083 PCI_DEVICE_ID_VIA_82C586_2,
1084 dev)) && (dev->devfn = 0x5a)) {
1085 /* Force correct USB interrupt */
1086 dev->irq = 11;
1087 pci_write_config_byte(dev,
1088 PCI_INTERRUPT_LINE,
1089 dev->irq);
1090 }
1091 if ((dev = pci_get_device(PCI_VENDOR_ID_WINBOND,
1092 PCI_DEVICE_ID_WINBOND_83C553, dev))) {
1093 /* Clear PCI Interrupt Routing Control Register. */
1094 short_reg = 0x0000;
1095 pci_write_config_word(dev, 0x44, short_reg);
1096 if (OpenPIC_Addr){
1097 /* Route IDE interrupts to IRQ 14 */
1098 reg = 0xEE;
1099 pci_write_config_byte(dev, 0x43, reg);
1100 }
1101 }
1102 pci_dev_put(dev);
1103 }
1104
1105 if ((dev = pci_get_device(PCI_VENDOR_ID_WINBOND,
1106 PCI_DEVICE_ID_WINBOND_82C105, dev))){
1107 if (OpenPIC_Addr){
1108 /*
1109 * Disable LEGIRQ mode so PCI INTS are routed
1110 * directly to the 8259 and enable both channels
1111 */
1112 pci_write_config_dword(dev, 0x40, 0x10ff0033);
1113
1114 /* Force correct IDE interrupt */
1115 dev->irq = 14;
1116 pci_write_config_byte(dev,
1117 PCI_INTERRUPT_LINE,
1118 dev->irq);
1119 } else {
1120 /* Enable LEGIRQ for PCI INT -> 8259 IRQ routing */
1121 pci_write_config_dword(dev, 0x40, 0x10ff08a1);
1122 }
1123 }
1124 pci_dev_put(dev);
1125}
1126
1127static void __init
1128Powerplus_Map_Non0(struct pci_dev *dev)
1129{
1130 struct pci_bus *pbus; /* Parent bus structure pointer */
1131 struct pci_dev *tdev = dev; /* Temporary device structure */
1132 unsigned int devnum; /* Accumulated device number */
1133 unsigned char intline; /* Linux interrupt value */
1134 unsigned char intpin; /* PCI interrupt pin */
1135
1136 /* Check for valid PCI dev pointer */
1137 if (dev == NULL) return;
1138
1139 /* Initialize bridge IDSEL variable */
1140 devnum = PCI_SLOT(tdev->devfn);
1141
1142 /* Read the interrupt pin of the device and adjust for indexing */
1143 pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &intpin);
1144
1145 /* If device doesn't request an interrupt, return */
1146 if ( (intpin < 1) || (intpin > 4) )
1147 return;
1148
1149 intpin--;
1150
1151 /*
1152 * Walk up to bus 0, adjusting the interrupt pin for the standard
1153 * PCI bus swizzle.
1154 */
1155 do {
1156 intpin = (prep_pci_intpins[devnum % 4][intpin]) - 1;
1157 pbus = tdev->bus; /* up one level */
1158 tdev = pbus->self;
1159 devnum = PCI_SLOT(tdev->devfn);
1160 } while(tdev->bus->number);
1161
1162 /* Use the primary interrupt inputs by default */
1163 intline = mot_info[mot_entry].pci_irq_list->primary[intpin];
1164
1165 /*
1166 * If the board has secondary interrupt inputs, walk the bus and
1167 * note the devfn of the bridge from bus 0. If it is the same as
1168 * the devfn of the bus bridge with secondary inputs, use those.
1169 * Otherwise, assume it's a PMC site and get the interrupt line
1170 * value from the interrupt routing table.
1171 */
1172 if (mot_info[mot_entry].secondary_bridge_devfn) {
1173 pbus = dev->bus;
1174
1175 while (pbus->primary != 0)
1176 pbus = pbus->parent;
1177
1178 if ((pbus->self)->devfn != 0xA0) {
1179 if ((pbus->self)->devfn == mot_info[mot_entry].secondary_bridge_devfn)
1180 intline = mot_info[mot_entry].pci_irq_list->secondary[intpin];
1181 else {
1182 if ((char *)(mot_info[mot_entry].map) == (char *)Mesquite_pci_IRQ_map)
1183 intline = mot_info[mot_entry].map[((pbus->self)->devfn)/8] + 16;
1184 else {
1185 int i;
1186 for (i=0;i<3;i++)
1187 intpin = (prep_pci_intpins[devnum % 4][intpin]) - 1;
1188 intline = mot_info[mot_entry].pci_irq_list->primary[intpin];
1189 }
1190 }
1191 }
1192 }
1193
1194 /* Write calculated interrupt value to header and device list */
1195 dev->irq = intline;
1196 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, (u8)dev->irq);
1197}
1198
1199void __init
1200prep_pcibios_fixup(void)
1201{
1202 struct pci_dev *dev = NULL;
1203 int irq;
1204 int have_openpic = (OpenPIC_Addr != NULL);
1205
1206 prep_route_pci_interrupts();
1207
1208 printk("Setting PCI interrupts for a \"%s\"\n", Motherboard_map_name);
1209
1210 /* Iterate through all the PCI devices, setting the IRQ */
1211 for_each_pci_dev(dev) {
1212 /*
1213 * If we have residual data, then this is easy: query the
1214 * residual data for the IRQ line allocated to the device.
1215 * This works the same whether we have an OpenPic or not.
1216 */
1217 if (have_residual_data) {
1218 irq = residual_pcidev_irq(dev);
1219 dev->irq = have_openpic ? openpic_to_irq(irq) : irq;
1220 }
1221 /*
1222 * If we don't have residual data, then we need to use
1223 * tables to determine the IRQ. The table organisation
1224 * is different depending on whether there is an OpenPIC
1225 * or not. The tables are only used for bus 0, so check
1226 * this first.
1227 */
1228 else if (dev->bus->number == 0) {
1229 irq = Motherboard_map[PCI_SLOT(dev->devfn)];
1230 dev->irq = have_openpic ? openpic_to_irq(irq)
1231 : Motherboard_routes[irq];
1232 }
1233 /*
1234 * Finally, if we don't have residual data and the bus is
1235 * non-zero, use the callback (if provided)
1236 */
1237 else {
1238 if (Motherboard_non0 != NULL)
1239 Motherboard_non0(dev);
1240
1241 continue;
1242 }
1243
1244 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
1245 }
1246
1247 /* Setup the Winbond or Via PIB - prep_pib_init() is coded for
1248 * the non-openpic case, but it breaks (at least) the Utah
1249 * (Powerstack II Pro4000), so only call it if we have an
1250 * openpic.
1251 */
1252 if (have_openpic)
1253 prep_pib_init();
1254}
1255
1256static void __init
1257prep_pcibios_after_init(void)
1258{
1259#if 0
1260 struct pci_dev *dev;
1261
1262 /* If there is a WD 90C, reset the IO BAR to 0x0 (it started that
1263 * way, but the PCI layer relocated it because it thought 0x0 was
1264 * invalid for a BAR).
1265 * If you don't do this, the card's VGA base will be <IO BAR>+0xc0000
1266 * instead of 0xc0000. vgacon.c (for example) is completely unaware of
1267 * this little quirk.
1268 */
1269 dev = pci_get_device(PCI_VENDOR_ID_WD, PCI_DEVICE_ID_WD_90C, NULL);
1270 if (dev) {
1271 dev->resource[1].end -= dev->resource[1].start;
1272 dev->resource[1].start = 0;
1273 /* tell the hardware */
1274 pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, 0x0);
1275 pci_dev_put(dev);
1276 }
1277#endif
1278}
1279
1280static void __init
1281prep_init_resource(struct resource *res, unsigned long start,
1282 unsigned long end, int flags)
1283{
1284 res->flags = flags;
1285 res->start = start;
1286 res->end = end;
1287 res->name = "PCI host bridge";
1288 res->parent = NULL;
1289 res->sibling = NULL;
1290 res->child = NULL;
1291}
1292
1293void __init
1294prep_find_bridges(void)
1295{
1296 struct pci_controller* hose;
1297
1298 hose = pcibios_alloc_controller();
1299 if (!hose)
1300 return;
1301
1302 hose->first_busno = 0;
1303 hose->last_busno = 0xff;
1304 hose->pci_mem_offset = PREP_ISA_MEM_BASE;
1305 hose->io_base_phys = PREP_ISA_IO_BASE;
1306 hose->io_base_virt = ioremap(PREP_ISA_IO_BASE, 0x800000);
1307 prep_init_resource(&hose->io_resource, 0, 0x007fffff, IORESOURCE_IO);
1308 prep_init_resource(&hose->mem_resources[0], 0xc0000000, 0xfeffffff,
1309 IORESOURCE_MEM);
1310 setup_indirect_pci(hose, PREP_ISA_IO_BASE + 0xcf8,
1311 PREP_ISA_IO_BASE + 0xcfc);
1312
1313 printk("PReP architecture\n");
1314
1315 if (have_residual_data) {
1316 PPC_DEVICE *hostbridge;
1317
1318 hostbridge = residual_find_device(PROCESSORDEVICE, NULL,
1319 BridgeController, PCIBridge, -1, 0);
1320 if (hostbridge &&
1321 ((hostbridge->DeviceId.Interface == PCIBridgeIndirect) ||
1322 (hostbridge->DeviceId.Interface == PCIBridgeRS6K))) {
1323 PnP_TAG_PACKET * pkt;
1324 pkt = PnP_find_large_vendor_packet(
1325 res->DevicePnPHeap+hostbridge->AllocatedOffset,
1326 3, 0);
1327 if(pkt) {
1328#define p pkt->L4_Pack.L4_Data.L4_PPCPack
1329 setup_indirect_pci(hose,
1330 ld_le32((unsigned *) (p.PPCData)),
1331 ld_le32((unsigned *) (p.PPCData+8)));
1332#undef p
1333 } else
1334 setup_indirect_pci(hose, 0x80000cf8, 0x80000cfc);
1335 }
1336 }
1337
1338 ppc_md.pcibios_fixup = prep_pcibios_fixup;
1339 ppc_md.pcibios_after_init = prep_pcibios_after_init;
1340}