xref: /freebsd/sys/powerpc/powermac/uninorth.c (revision 2357939bc239bd5334a169b62313806178dd8f30) 
1 /*
2  * Copyright (C) 2002 Benno Rice.
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 Benno Rice ``AS IS'' AND ANY EXPRESS OR
15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
18  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
20  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
21  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
22  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
23  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24  *
25  * $FreeBSD$
26  */
27 
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/bus.h>
31 #include <sys/conf.h>
32 #include <sys/kernel.h>
33 
34 #include <dev/ofw/openfirm.h>
35 #include <dev/ofw/ofw_pci.h>
36 
37 #include <dev/pci/pcivar.h>
38 #include <dev/pci/pcireg.h>
39 
40 #include <machine/bus.h>
41 #include <machine/md_var.h>
42 #include <machine/nexusvar.h>
43 #include <machine/resource.h>
44 
45 #include <sys/rman.h>
46 
47 #include <powerpc/ofw/ofw_pci.h>
48 #include <powerpc/powermac/uninorthvar.h>
49 
50 #include <vm/vm.h>
51 #include <vm/pmap.h>
52 
53 #include "pcib_if.h"
54 
55 #define	UNINORTH_DEBUG	0
56 
57 /*
58  * Device interface.
59  */
60 static int		uninorth_probe(device_t);
61 static int		uninorth_attach(device_t);
62 
63 /*
64  * Bus interface.
65  */
66 static int		uninorth_read_ivar(device_t, device_t, int,
67 			    uintptr_t *);
68 static struct		resource * uninorth_alloc_resource(device_t bus,
69 			    device_t child, int type, int *rid, u_long start,
70 			    u_long end, u_long count, u_int flags);
71 static int		uninorth_activate_resource(device_t bus, device_t child,
72 			    int type, int rid, struct resource *res);
73 
74 /*
75  * pcib interface.
76  */
77 static int		uninorth_maxslots(device_t);
78 static u_int32_t	uninorth_read_config(device_t, u_int, u_int, u_int,
79 			    u_int, int);
80 static void		uninorth_write_config(device_t, u_int, u_int, u_int,
81 			    u_int, u_int32_t, int);
82 static int		uninorth_route_interrupt(device_t, device_t, int);
83 
84 /*
85  * Local routines.
86  */
87 static int		uninorth_enable_config(struct uninorth_softc *, u_int,
88 			    u_int, u_int, u_int);
89 static void		unin_enable_gmac(void);
90 
91 /*
92  * Driver methods.
93  */
94 static device_method_t	uninorth_methods[] = {
95 	/* Device interface */
96 	DEVMETHOD(device_probe,		uninorth_probe),
97 	DEVMETHOD(device_attach,	uninorth_attach),
98 
99 	/* Bus interface */
100 	DEVMETHOD(bus_print_child,	bus_generic_print_child),
101 	DEVMETHOD(bus_read_ivar,	uninorth_read_ivar),
102 	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
103 	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
104 	DEVMETHOD(bus_alloc_resource,	uninorth_alloc_resource),
105 	DEVMETHOD(bus_activate_resource,	uninorth_activate_resource),
106 
107 	/* pcib interface */
108 	DEVMETHOD(pcib_maxslots,	uninorth_maxslots),
109 	DEVMETHOD(pcib_read_config,	uninorth_read_config),
110 	DEVMETHOD(pcib_write_config,	uninorth_write_config),
111 	DEVMETHOD(pcib_route_interrupt,	uninorth_route_interrupt),
112 
113 	{ 0, 0 }
114 };
115 
116 static driver_t	uninorth_driver = {
117 	"pcib",
118 	uninorth_methods,
119 	sizeof(struct uninorth_softc)
120 };
121 
122 static devclass_t	uninorth_devclass;
123 
124 DRIVER_MODULE(uninorth, nexus, uninorth_driver, uninorth_devclass, 0, 0);
125 
126 static int
127 uninorth_probe(device_t dev)
128 {
129 	char	*type, *compatible;
130 
131 	type = nexus_get_device_type(dev);
132 	compatible = nexus_get_compatible(dev);
133 
134 	if (type == NULL || compatible == NULL)
135 		return (ENXIO);
136 
137 	if (strcmp(type, "pci") != 0 || strcmp(compatible, "uni-north") != 0)
138 		return (ENXIO);
139 
140 	device_set_desc(dev, "Apple UniNorth Host-PCI bridge");
141 	return (0);
142 }
143 
144 static int
145 uninorth_attach(device_t dev)
146 {
147 	struct		uninorth_softc *sc;
148 	phandle_t	node;
149 	phandle_t	child;
150 	u_int32_t	reg[2], busrange[2];
151 	struct		uninorth_range *rp, *io, *mem[2];
152 	int		nmem, i;
153 
154 	node = nexus_get_node(dev);
155 	sc = device_get_softc(dev);
156 
157 	if (OF_getprop(node, "reg", reg, sizeof(reg)) < 8)
158 		return (ENXIO);
159 
160 	if (OF_getprop(node, "bus-range", busrange, sizeof(busrange)) != 8)
161 		return (ENXIO);
162 
163 	sc->sc_dev = dev;
164 	sc->sc_node = node;
165 	sc->sc_addr = (vm_offset_t)pmap_mapdev(reg[0] + 0x800000, PAGE_SIZE);
166 	sc->sc_data = (vm_offset_t)pmap_mapdev(reg[0] + 0xc00000, PAGE_SIZE);
167 	sc->sc_bus = busrange[0];
168 
169 	bzero(sc->sc_range, sizeof(sc->sc_range));
170 	sc->sc_nrange = OF_getprop(node, "ranges", sc->sc_range,
171 	    sizeof(sc->sc_range));
172 
173 	if (sc->sc_nrange == -1) {
174 		device_printf(dev, "could not get ranges\n");
175 		return (ENXIO);
176 	}
177 
178 	sc->sc_range[6].pci_hi = 0;
179 	io = NULL;
180 	nmem = 0;
181 
182 	for (rp = sc->sc_range; rp->pci_hi != 0; rp++) {
183 		switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) {
184 		case OFW_PCI_PHYS_HI_SPACE_CONFIG:
185 			break;
186 		case OFW_PCI_PHYS_HI_SPACE_IO:
187 			io = rp;
188 			break;
189 		case OFW_PCI_PHYS_HI_SPACE_MEM32:
190 			mem[nmem] = rp;
191 			nmem++;
192 			break;
193 		case OFW_PCI_PHYS_HI_SPACE_MEM64:
194 			break;
195 		}
196 	}
197 
198 	if (io == NULL) {
199 		device_printf(dev, "can't find io range\n");
200 		return (ENXIO);
201 	}
202 	sc->sc_io_rman.rm_type = RMAN_ARRAY;
203 	sc->sc_io_rman.rm_descr = "UniNorth PCI I/O Ports";
204 	if (rman_init(&sc->sc_io_rman) != 0 ||
205 	    rman_manage_region(&sc->sc_io_rman, io->pci_lo,
206 	    io->pci_lo + io->size_lo) != 0) {
207 		device_printf(dev, "failed to set up io range management\n");
208 		return (ENXIO);
209 	}
210 
211 	if (nmem == 0) {
212 		device_printf(dev, "can't find mem ranges\n");
213 		return (ENXIO);
214 	}
215 	sc->sc_mem_rman.rm_type = RMAN_ARRAY;
216 	sc->sc_mem_rman.rm_descr = "UniNorth PCI Memory";
217 	if (rman_init(&sc->sc_mem_rman) != 0) {
218 		device_printf(dev,
219 		    "failed to init mem range resources\n");
220 		return (ENXIO);
221 	}
222 	for (i = 0; i < nmem; i++) {
223 		if (rman_manage_region(&sc->sc_mem_rman, mem[i]->pci_lo,
224 		    mem[i]->pci_lo + mem[i]->size_lo) != 0) {
225 			device_printf(dev,
226 			    "failed to set up memory range management\n");
227 			return (ENXIO);
228 		}
229 	}
230 
231 	/*
232 	 * Enable the GMAC ethernet cell if OpenFirmware says it is
233 	 * used
234 	 */
235 	for (child = OF_child(node); child; child = OF_peer(child)) {
236 		char compat[32];
237 
238 		memset(compat, 0, sizeof(compat));
239 		OF_getprop(child, "compatible", compat, sizeof(compat));
240 		if (strcmp(compat, "gmac") == 0) {
241 			unin_enable_gmac();
242 		}
243 	}
244 
245 	/*
246 	 * Write out the correct PIC interrupt values to config space
247 	 * of all devices on the bus. This has to be done after the GEM
248 	 * cell is enabled above.
249 	 */
250 	ofw_pci_fixup(dev, sc->sc_bus, node);
251 
252 	device_add_child(dev, "pci", device_get_unit(dev));
253 	return (bus_generic_attach(dev));
254 }
255 
256 static int
257 uninorth_maxslots(device_t dev)
258 {
259 
260 	return (PCI_SLOTMAX);
261 }
262 
263 static u_int32_t
264 uninorth_read_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,
265     int width)
266 {
267 	struct		uninorth_softc *sc;
268 	vm_offset_t	caoff;
269 
270 	sc = device_get_softc(dev);
271 	caoff = sc->sc_data + (reg & 0x07);
272 
273 	if (uninorth_enable_config(sc, bus, slot, func, reg) != 0) {
274 		switch (width) {
275 		case 1:
276 			return (in8rb(caoff));
277 			break;
278 		case 2:
279 			return (in16rb(caoff));
280 			break;
281 		case 4:
282 			return (in32rb(caoff));
283 			break;
284 		}
285 	}
286 
287 	return (0xffffffff);
288 }
289 
290 static void
291 uninorth_write_config(device_t dev, u_int bus, u_int slot, u_int func,
292     u_int reg, u_int32_t val, int width)
293 {
294 	struct		uninorth_softc *sc;
295 	vm_offset_t	caoff;
296 
297 	sc = device_get_softc(dev);
298 	caoff = sc->sc_data + (reg & 0x07);
299 
300 	if (uninorth_enable_config(sc, bus, slot, func, reg)) {
301 		switch (width) {
302 		case 1:
303 			out8rb(caoff, val);
304 			(void)in8rb(caoff);
305 			break;
306 		case 2:
307 			out16rb(caoff, val);
308 			(void)in16rb(caoff);
309 			break;
310 		case 4:
311 			out32rb(caoff, val);
312 			(void)in32rb(caoff);
313 			break;
314 		}
315 	}
316 }
317 
318 static int
319 uninorth_route_interrupt(device_t bus, device_t dev, int pin)
320 {
321 
322 	return (0);
323 }
324 
325 static int
326 uninorth_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
327 {
328 	struct	uninorth_softc *sc;
329 
330 	sc = device_get_softc(dev);
331 
332 	switch (which) {
333 	case PCIB_IVAR_BUS:
334 		*result = sc->sc_bus;
335 		return (0);
336 		break;
337 	}
338 
339 	return (ENOENT);
340 }
341 
342 static struct resource *
343 uninorth_alloc_resource(device_t bus, device_t child, int type, int *rid,
344     u_long start, u_long end, u_long count, u_int flags)
345 {
346 	struct			uninorth_softc *sc;
347 	struct			resource *rv;
348 	struct			rman *rm;
349 	bus_space_tag_t		bt;
350 	int			needactivate;
351 
352 	needactivate = flags & RF_ACTIVE;
353 	flags &= ~RF_ACTIVE;
354 
355 	sc = device_get_softc(bus);
356 
357 	switch (type) {
358 	case SYS_RES_MEMORY:
359 		rm = &sc->sc_mem_rman;
360 		bt = PPC_BUS_SPACE_MEM;
361 		break;
362 	case SYS_RES_IRQ:
363 		return (bus_alloc_resource(bus, type, rid, start, end, count,
364 		    flags));
365 		break;
366 	default:
367 		device_printf(bus, "unknown resource request from %s\n",
368 		    device_get_nameunit(child));
369 		return (NULL);
370 	}
371 
372 	rv = rman_reserve_resource(rm, start, end, count, flags, child);
373 	if (rv == NULL) {
374 		device_printf(bus, "failed to reserve resource for %s\n",
375 		    device_get_nameunit(child));
376 		return (NULL);
377 	}
378 
379 	rman_set_bustag(rv, bt);
380 	rman_set_bushandle(rv, rman_get_start(rv));
381 
382 	if (needactivate) {
383 		if (bus_activate_resource(child, type, *rid, rv) != 0) {
384 			device_printf(bus,
385 			    "failed to activate resource for %s\n",
386 			    device_get_nameunit(child));
387 			rman_release_resource(rv);
388 			return (NULL);
389 		}
390 	}
391 
392 	return (rv);
393 }
394 
395 static int
396 uninorth_activate_resource(device_t bus, device_t child, int type, int rid,
397     struct resource *res)
398 {
399 	void	*p;
400 
401 	if (type == SYS_RES_IRQ)
402 		return (bus_activate_resource(bus, type, rid, res));
403 
404 	if (type == SYS_RES_MEMORY) {
405 		p = pmap_mapdev((vm_offset_t)rman_get_start(res),
406 		    (vm_size_t)rman_get_size(res));
407 		if (p == NULL)
408 			return (ENOMEM);
409 		rman_set_virtual(res, p);
410 		rman_set_bushandle(res, (u_long)p);
411 	}
412 
413 	return (rman_activate_resource(res));
414 }
415 
416 static int
417 uninorth_enable_config(struct uninorth_softc *sc, u_int bus, u_int slot,
418     u_int func, u_int reg)
419 {
420 	u_int32_t	cfgval;
421 
422 	if (sc->sc_bus == bus) {
423 		/*
424 		 * No slots less than 11 on the primary bus
425 		 */
426 		if (slot < 11)
427 			return (0);
428 
429 		cfgval = (1 << slot) | (func << 8) | (reg & 0xfc);
430 	} else {
431 		cfgval = (bus << 16) | (slot << 11) | (func << 8) |
432 		    (reg & 0xfc) | 1;
433 	}
434 
435 	do {
436 		out32rb(sc->sc_addr, cfgval);
437 	} while (in32rb(sc->sc_addr) != cfgval);
438 
439 	return (1);
440 }
441 
442 /*
443  * Driver to swallow UniNorth host bridges from the PCI bus side.
444  */
445 static int
446 unhb_probe(device_t dev)
447 {
448 
449 	if (pci_get_class(dev) == PCIC_BRIDGE &&
450 	    pci_get_subclass(dev) == PCIS_BRIDGE_HOST) {
451 		device_set_desc(dev, "Host to PCI bridge");
452 		device_quiet(dev);
453 		return (-10000);
454 	}
455 
456 	return (ENXIO);
457 }
458 
459 static int
460 unhb_attach(device_t dev)
461 {
462 
463 	return (0);
464 }
465 
466 static device_method_t unhb_methods[] = {
467 	/* Device interface */
468 	DEVMETHOD(device_probe,         unhb_probe),
469 	DEVMETHOD(device_attach,        unhb_attach),
470 
471 	{ 0, 0 }
472 };
473 
474 static driver_t unhb_driver = {
475 	"unhb",
476 	unhb_methods,
477 	1,
478 };
479 static devclass_t unhb_devclass;
480 
481 DRIVER_MODULE(unhb, pci, unhb_driver, unhb_devclass, 0, 0);
482 
483 
484 /*
485  * Small stub driver for the Uninorth chip itself, to allow setting
486  * of various parameters and cell enables
487  */
488 static struct unin_chip_softc *uncsc;
489 
490 static void
491 unin_enable_gmac(void)
492 {
493 	volatile u_int *clkreg;
494 	u_int32_t tmpl;
495 
496 	if (uncsc == NULL)
497 		panic("unin_enable_gmac: device not found");
498 
499 	clkreg = (void *)(uncsc->sc_addr + UNIN_CLOCKCNTL);
500 	tmpl = inl(clkreg);
501 	tmpl |= UNIN_CLOCKCNTL_GMAC;
502 	outl(clkreg, tmpl);
503 }
504 
505 static int
506 unin_chip_probe(device_t dev)
507 {
508 	char	*name;
509 
510 	name = nexus_get_name(dev);
511 
512 	if (name == NULL)
513 		return (ENXIO);
514 
515 	if (strcmp(name, "uni-n") != 0)
516 		return (ENXIO);
517 
518 	device_set_desc(dev, "Apple UniNorth System Controller");
519 	return (0);
520 }
521 
522 static int
523 unin_chip_attach(device_t dev)
524 {
525 	phandle_t node;
526 	u_int reg[2];
527 
528 	uncsc = device_get_softc(dev);
529 	node = nexus_get_node(dev);
530 
531 	if (OF_getprop(node, "reg", reg, sizeof(reg)) < 8)
532 		return (ENXIO);
533 
534 	uncsc->sc_physaddr = reg[0];
535 	uncsc->sc_size = reg[1];
536 
537 	/*
538 	 * Only map the first page, since that is where the registers
539 	 * of interest lie.
540 	 */
541 	uncsc->sc_addr = (vm_offset_t) pmap_mapdev(reg[0], PAGE_SIZE);
542 
543 	uncsc->sc_version = *(u_int *)uncsc->sc_addr;
544 	device_printf(dev, "Version %d\n", uncsc->sc_version);
545 
546 	return (0);
547 }
548 
549 static device_method_t unin_chip_methods[] = {
550 	/* Device interface */
551 	DEVMETHOD(device_probe,         unin_chip_probe),
552 	DEVMETHOD(device_attach,        unin_chip_attach),
553 
554 	{ 0, 0 }
555 };
556 
557 static driver_t	unin_chip_driver = {
558 	"unin",
559 	unin_chip_methods,
560 	sizeof(struct unin_chip_softc)
561 };
562 
563 static devclass_t	unin_chip_devclass;
564 
565 DRIVER_MODULE(unin, nexus, unin_chip_driver, unin_chip_devclass, 0, 0);
566 
567 
568 
569 
570