uninorth.c revision 179746 
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: head/sys/powerpc/powermac/uninorth.c 179746 2008-06-12 02:28:58Z kevlo $
26 */
27
28#include <sys/param.h>
29#include <sys/systm.h>
30#include <sys/module.h>
31#include <sys/bus.h>
32#include <sys/conf.h>
33#include <sys/kernel.h>
34
35#include <dev/ofw/openfirm.h>
36#include <dev/ofw/ofw_pci.h>
37
38#include <dev/pci/pcivar.h>
39#include <dev/pci/pcireg.h>
40
41#include <machine/bus.h>
42#include <machine/md_var.h>
43#include <machine/nexusvar.h>
44#include <machine/pio.h>
45#include <machine/resource.h>
46
47#include <sys/rman.h>
48
49#include <powerpc/ofw/ofw_pci.h>
50#include <powerpc/powermac/uninorthvar.h>
51
52#include <vm/vm.h>
53#include <vm/pmap.h>
54
55#include "pcib_if.h"
56
57#define	UNINORTH_DEBUG	0
58
59/*
60 * Device interface.
61 */
62static int		uninorth_probe(device_t);
63static int		uninorth_attach(device_t);
64
65/*
66 * Bus interface.
67 */
68static int		uninorth_read_ivar(device_t, device_t, int,
69			    uintptr_t *);
70static struct		resource * uninorth_alloc_resource(device_t bus,
71			    device_t child, int type, int *rid, u_long start,
72			    u_long end, u_long count, u_int flags);
73static int		uninorth_activate_resource(device_t bus, device_t child,
74			    int type, int rid, struct resource *res);
75
76/*
77 * pcib interface.
78 */
79static int		uninorth_maxslots(device_t);
80static u_int32_t	uninorth_read_config(device_t, u_int, u_int, u_int,
81			    u_int, int);
82static void		uninorth_write_config(device_t, u_int, u_int, u_int,
83			    u_int, u_int32_t, int);
84static int		uninorth_route_interrupt(device_t, device_t, int);
85
86/*
87 * Local routines.
88 */
89static int		uninorth_enable_config(struct uninorth_softc *, u_int,
90			    u_int, u_int, u_int);
91static void		unin_enable_gmac(void);
92
93/*
94 * Driver methods.
95 */
96static device_method_t	uninorth_methods[] = {
97	/* Device interface */
98	DEVMETHOD(device_probe,		uninorth_probe),
99	DEVMETHOD(device_attach,	uninorth_attach),
100
101	/* Bus interface */
102	DEVMETHOD(bus_print_child,	bus_generic_print_child),
103	DEVMETHOD(bus_read_ivar,	uninorth_read_ivar),
104	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
105	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
106	DEVMETHOD(bus_alloc_resource,	uninorth_alloc_resource),
107	DEVMETHOD(bus_activate_resource,	uninorth_activate_resource),
108
109	/* pcib interface */
110	DEVMETHOD(pcib_maxslots,	uninorth_maxslots),
111	DEVMETHOD(pcib_read_config,	uninorth_read_config),
112	DEVMETHOD(pcib_write_config,	uninorth_write_config),
113	DEVMETHOD(pcib_route_interrupt,	uninorth_route_interrupt),
114
115	{ 0, 0 }
116};
117
118static driver_t	uninorth_driver = {
119	"pcib",
120	uninorth_methods,
121	sizeof(struct uninorth_softc)
122};
123
124static devclass_t	uninorth_devclass;
125
126DRIVER_MODULE(uninorth, nexus, uninorth_driver, uninorth_devclass, 0, 0);
127
128static int
129uninorth_probe(device_t dev)
130{
131	char	*type, *compatible;
132
133	type = nexus_get_device_type(dev);
134	compatible = nexus_get_compatible(dev);
135
136	if (type == NULL || compatible == NULL)
137		return (ENXIO);
138
139	if (strcmp(type, "pci") != 0 || strcmp(compatible, "uni-north") != 0)
140		return (ENXIO);
141
142	device_set_desc(dev, "Apple UniNorth Host-PCI bridge");
143	return (0);
144}
145
146static int
147uninorth_attach(device_t dev)
148{
149	struct		uninorth_softc *sc;
150	phandle_t	node;
151	phandle_t	child;
152	u_int32_t	reg[2], busrange[2];
153	struct		uninorth_range *rp, *io, *mem[2];
154	int		nmem, i, error;
155
156	node = nexus_get_node(dev);
157	sc = device_get_softc(dev);
158
159	if (OF_getprop(node, "reg", reg, sizeof(reg)) < 8)
160		return (ENXIO);
161
162	if (OF_getprop(node, "bus-range", busrange, sizeof(busrange)) != 8)
163		return (ENXIO);
164
165	sc->sc_dev = dev;
166	sc->sc_node = node;
167	sc->sc_addr = (vm_offset_t)pmap_mapdev(reg[0] + 0x800000, PAGE_SIZE);
168	sc->sc_data = (vm_offset_t)pmap_mapdev(reg[0] + 0xc00000, PAGE_SIZE);
169	sc->sc_bus = busrange[0];
170
171	bzero(sc->sc_range, sizeof(sc->sc_range));
172	sc->sc_nrange = OF_getprop(node, "ranges", sc->sc_range,
173	    sizeof(sc->sc_range));
174
175	if (sc->sc_nrange == -1) {
176		device_printf(dev, "could not get ranges\n");
177		return (ENXIO);
178	}
179
180	sc->sc_range[6].pci_hi = 0;
181	io = NULL;
182	nmem = 0;
183
184	for (rp = sc->sc_range; rp->pci_hi != 0; rp++) {
185		switch (rp->pci_hi & OFW_PCI_PHYS_HI_SPACEMASK) {
186		case OFW_PCI_PHYS_HI_SPACE_CONFIG:
187			break;
188		case OFW_PCI_PHYS_HI_SPACE_IO:
189			io = rp;
190			break;
191		case OFW_PCI_PHYS_HI_SPACE_MEM32:
192			mem[nmem] = rp;
193			nmem++;
194			break;
195		case OFW_PCI_PHYS_HI_SPACE_MEM64:
196			break;
197		}
198	}
199
200	if (io == NULL) {
201		device_printf(dev, "can't find io range\n");
202		return (ENXIO);
203	}
204	sc->sc_io_rman.rm_type = RMAN_ARRAY;
205	sc->sc_io_rman.rm_descr = "UniNorth PCI I/O Ports";
206	sc->sc_iostart = io->host;
207	if (rman_init(&sc->sc_io_rman) != 0 ||
208	    rman_manage_region(&sc->sc_io_rman, io->pci_lo,
209	    io->pci_lo + io->size_lo - 1) != 0) {
210		panic("uninorth_attach: failed to set up I/O rman");
211	}
212
213	if (nmem == 0) {
214		device_printf(dev, "can't find mem ranges\n");
215		return (ENXIO);
216	}
217	sc->sc_mem_rman.rm_type = RMAN_ARRAY;
218	sc->sc_mem_rman.rm_descr = "UniNorth PCI Memory";
219	error = rman_init(&sc->sc_mem_rman);
220	if (error) {
221		device_printf(dev, "rman_init() failed. error = %d\n", error);
222		return (error);
223	}
224	for (i = 0; i < nmem; i++) {
225		error = rman_manage_region(&sc->sc_mem_rman, mem[i]->pci_lo,
226		    mem[i]->pci_lo + mem[i]->size_lo - 1);
227		if (error) {
228			device_printf(dev,
229			    "rman_manage_region() failed. error = %d\n", error);
230			return (error);
231		}
232	}
233
234	/*
235	 * Enable the GMAC Ethernet cell if Open Firmware says it is
236	 * used.
237	 */
238	for (child = OF_child(node); child; child = OF_peer(child)) {
239		char compat[32];
240
241		memset(compat, 0, sizeof(compat));
242		OF_getprop(child, "compatible", compat, sizeof(compat));
243		if (strcmp(compat, "gmac") == 0) {
244			unin_enable_gmac();
245		}
246	}
247
248	/*
249	 * Write out the correct PIC interrupt values to config space
250	 * of all devices on the bus. This has to be done after the GEM
251	 * cell is enabled above.
252	 */
253	ofw_pci_fixup(dev, sc->sc_bus, node);
254
255	device_add_child(dev, "pci", device_get_unit(dev));
256	return (bus_generic_attach(dev));
257}
258
259static int
260uninorth_maxslots(device_t dev)
261{
262
263	return (PCI_SLOTMAX);
264}
265
266static u_int32_t
267uninorth_read_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,
268    int width)
269{
270	struct		uninorth_softc *sc;
271	vm_offset_t	caoff;
272
273	sc = device_get_softc(dev);
274	caoff = sc->sc_data + (reg & 0x07);
275
276	if (uninorth_enable_config(sc, bus, slot, func, reg) != 0) {
277		switch (width) {
278		case 1:
279			return (in8rb(caoff));
280			break;
281		case 2:
282			return (in16rb(caoff));
283			break;
284		case 4:
285			return (in32rb(caoff));
286			break;
287		}
288	}
289
290	return (0xffffffff);
291}
292
293static void
294uninorth_write_config(device_t dev, u_int bus, u_int slot, u_int func,
295    u_int reg, u_int32_t val, int width)
296{
297	struct		uninorth_softc *sc;
298	vm_offset_t	caoff;
299
300	sc = device_get_softc(dev);
301	caoff = sc->sc_data + (reg & 0x07);
302
303	if (uninorth_enable_config(sc, bus, slot, func, reg)) {
304		switch (width) {
305		case 1:
306			out8rb(caoff, val);
307			break;
308		case 2:
309			out16rb(caoff, val);
310			break;
311		case 4:
312			out32rb(caoff, val);
313			break;
314		}
315	}
316}
317
318static int
319uninorth_route_interrupt(device_t bus, device_t dev, int pin)
320{
321
322	return (0);
323}
324
325static int
326uninorth_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_DOMAIN:
334		*result = device_get_unit(dev);
335		return (0);
336	case PCIB_IVAR_BUS:
337		*result = sc->sc_bus;
338		return (0);
339	}
340
341	return (ENOENT);
342}
343
344static struct resource *
345uninorth_alloc_resource(device_t bus, device_t child, int type, int *rid,
346    u_long start, u_long end, u_long count, u_int flags)
347{
348	struct			uninorth_softc *sc;
349	struct			resource *rv;
350	struct			rman *rm;
351	int			needactivate;
352
353	needactivate = flags & RF_ACTIVE;
354	flags &= ~RF_ACTIVE;
355
356	sc = device_get_softc(bus);
357
358	switch (type) {
359	case SYS_RES_MEMORY:
360		rm = &sc->sc_mem_rman;
361		break;
362
363	case SYS_RES_IOPORT:
364		rm = &sc->sc_io_rman;
365		break;
366
367	case SYS_RES_IRQ:
368		return (bus_alloc_resource(bus, type, rid, start, end, count,
369		    flags));
370
371	default:
372		device_printf(bus, "unknown resource request from %s\n",
373		    device_get_nameunit(child));
374		return (NULL);
375	}
376
377	rv = rman_reserve_resource(rm, start, end, count, flags, child);
378	if (rv == NULL) {
379		device_printf(bus, "failed to reserve resource for %s\n",
380		    device_get_nameunit(child));
381		return (NULL);
382	}
383
384	rman_set_rid(rv, *rid);
385
386	if (needactivate) {
387		if (bus_activate_resource(child, type, *rid, rv) != 0) {
388			device_printf(bus,
389			    "failed to activate resource for %s\n",
390			    device_get_nameunit(child));
391			rman_release_resource(rv);
392			return (NULL);
393		}
394	}
395
396	return (rv);
397}
398
399static int
400uninorth_activate_resource(device_t bus, device_t child, int type, int rid,
401    struct resource *res)
402{
403	void	*p;
404	struct	uninorth_softc *sc;
405
406	sc = device_get_softc(bus);
407
408	if (type == SYS_RES_IRQ)
409		return (bus_activate_resource(bus, type, rid, res));
410
411	if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
412		vm_offset_t start;
413
414		start = (vm_offset_t)rman_get_start(res);
415		/*
416		 * For i/o-ports, convert the start address to the
417		 * uninorth PCI i/o window
418		 */
419		if (type == SYS_RES_IOPORT)
420			start += sc->sc_iostart;
421
422		if (bootverbose)
423			printf("uninorth mapdev: start %x, len %ld\n", start,
424			    rman_get_size(res));
425
426		p = pmap_mapdev(start, (vm_size_t)rman_get_size(res));
427		if (p == NULL)
428			return (ENOMEM);
429		rman_set_virtual(res, p);
430		rman_set_bustag(res, &bs_le_tag);
431		rman_set_bushandle(res, (u_long)p);
432	}
433
434	return (rman_activate_resource(res));
435}
436
437static int
438uninorth_enable_config(struct uninorth_softc *sc, u_int bus, u_int slot,
439    u_int func, u_int reg)
440{
441	uint32_t	cfgval;
442	uint32_t	pass;
443
444	if (resource_int_value(device_get_name(sc->sc_dev),
445	        device_get_unit(sc->sc_dev), "skipslot", &pass) == 0) {
446		if (pass == slot)
447			return (0);
448	}
449
450	if (sc->sc_bus == bus) {
451		/*
452		 * No slots less than 11 on the primary bus
453		 */
454		if (slot < 11)
455			return (0);
456
457		cfgval = (1 << slot) | (func << 8) | (reg & 0xfc);
458	} else {
459		cfgval = (bus << 16) | (slot << 11) | (func << 8) |
460		    (reg & 0xfc) | 1;
461	}
462
463	do {
464		out32rb(sc->sc_addr, cfgval);
465	} while (in32rb(sc->sc_addr) != cfgval);
466
467	return (1);
468}
469
470/*
471 * Driver to swallow UniNorth host bridges from the PCI bus side.
472 */
473static int
474unhb_probe(device_t dev)
475{
476
477	if (pci_get_class(dev) == PCIC_BRIDGE &&
478	    pci_get_subclass(dev) == PCIS_BRIDGE_HOST) {
479		device_set_desc(dev, "Host to PCI bridge");
480		device_quiet(dev);
481		return (-10000);
482	}
483
484	return (ENXIO);
485}
486
487static int
488unhb_attach(device_t dev)
489{
490
491	return (0);
492}
493
494static device_method_t unhb_methods[] = {
495	/* Device interface */
496	DEVMETHOD(device_probe,         unhb_probe),
497	DEVMETHOD(device_attach,        unhb_attach),
498
499	{ 0, 0 }
500};
501
502static driver_t unhb_driver = {
503	"unhb",
504	unhb_methods,
505	1,
506};
507static devclass_t unhb_devclass;
508
509DRIVER_MODULE(unhb, pci, unhb_driver, unhb_devclass, 0, 0);
510
511
512/*
513 * Small stub driver for the Uninorth chip itself, to allow setting
514 * of various parameters and cell enables
515 */
516static struct unin_chip_softc *uncsc;
517
518static void
519unin_enable_gmac(void)
520{
521	volatile u_int *clkreg;
522	u_int32_t tmpl;
523
524	if (uncsc == NULL)
525		panic("unin_enable_gmac: device not found");
526
527	clkreg = (void *)(uncsc->sc_addr + UNIN_CLOCKCNTL);
528	tmpl = inl(clkreg);
529	tmpl |= UNIN_CLOCKCNTL_GMAC;
530	outl(clkreg, tmpl);
531}
532
533static int
534unin_chip_probe(device_t dev)
535{
536	char	*name;
537
538	name = nexus_get_name(dev);
539
540	if (name == NULL)
541		return (ENXIO);
542
543	if (strcmp(name, "uni-n") != 0)
544		return (ENXIO);
545
546	device_set_desc(dev, "Apple UniNorth System Controller");
547	return (0);
548}
549
550static int
551unin_chip_attach(device_t dev)
552{
553	phandle_t node;
554	u_int reg[2];
555
556	uncsc = device_get_softc(dev);
557	node = nexus_get_node(dev);
558
559	if (OF_getprop(node, "reg", reg, sizeof(reg)) < 8)
560		return (ENXIO);
561
562	uncsc->sc_physaddr = reg[0];
563	uncsc->sc_size = reg[1];
564
565	/*
566	 * Only map the first page, since that is where the registers
567	 * of interest lie.
568	 */
569	uncsc->sc_addr = (vm_offset_t) pmap_mapdev(reg[0], PAGE_SIZE);
570
571	uncsc->sc_version = *(u_int *)uncsc->sc_addr;
572	device_printf(dev, "Version %d\n", uncsc->sc_version);
573
574	return (0);
575}
576
577static device_method_t unin_chip_methods[] = {
578	/* Device interface */
579	DEVMETHOD(device_probe,         unin_chip_probe),
580	DEVMETHOD(device_attach,        unin_chip_attach),
581
582	{ 0, 0 }
583};
584
585static driver_t	unin_chip_driver = {
586	"unin",
587	unin_chip_methods,
588	sizeof(struct unin_chip_softc)
589};
590
591static devclass_t	unin_chip_devclass;
592
593DRIVER_MODULE(unin, nexus, unin_chip_driver, unin_chip_devclass, 0, 0);
594
595
596
597
598