summaryrefslogtreecommitdiffstats
path: root/sys/sparc64/ebus/ebus.c
blob: 42d78c858c1e2920b7e9726aef891ad8bffcf8fb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
/*
 * Copyright (c) 1999, 2000 Matthew R. Green
 * Copyright (c) 2001 Thomas Moestl <tmm@FreeBSD.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	from: NetBSD: ebus.c,v 1.26 2001/09/10 16:27:53 eeh Exp
 *
 * $FreeBSD$
 */

#include "opt_ebus.h"

/*
 * UltraSPARC 5 and beyond ebus support.
 *
 * note that this driver is not complete:
 *	- ebus2 dma code is completely unwritten
 *	- interrupt establish is written and appears to work
 *	- bus map code is written and appears to work
 * XXX: This is PCI specific, however, there exist SBus-to-EBus bridges...
 * XXX: The EBus was designed to allow easy adaption of ISA devices to it - a
 * compatability layer for ISA devices might be nice, although probably not
 * easily possible because of some cruft (like in[bwl]/out[bwl] and friends).
 * Additionally, the existing ISA code is limited to one ISA bus, however,
 * there are machines with both ISA and EBus.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>

#include <ofw/openfirm.h>
#include <ofw/ofw_pci.h>

#include <machine/bus.h>
#include <machine/ofw_bus.h>
#include <machine/resource.h>

#include <pci/pcireg.h>
#include <pci/pcivar.h>

#include <sparc64/pci/ofw_pci.h>

/*
 * The register, ranges and interrupt map properties are identical to the ISA
 * ones.
 */
#include <sparc64/isa/ofw_isa.h>
#include <sparc64/ebus/ebusvar.h>

#ifdef EBUS_DEBUG
#define	EDB_PROM	0x01
#define EDB_CHILD	0x02
#define	EDB_INTRMAP	0x04
#define EDB_BUSMAP	0x08
#define EDB_BUSDMA	0x10
#define EDB_INTR	0x20
int ebus_debug = 0xff;
#define DPRINTF(l, s)   do { if (ebus_debug & l) printf s; } while (0)
#else
#define DPRINTF(l, s)
#endif

struct ebus_devinfo {
	char			*edi_name;	/* PROM name */
	char			*edi_compat;
	phandle_t		edi_node;	/* PROM node */

	struct resource_list	edi_rl;
};

struct ebus_softc {
	phandle_t		sc_node;

	struct isa_ranges	*sc_range;

	int			sc_nrange;
	int			sc_nimap;
};

static int ebus_probe(device_t);
static int ebus_print_child(device_t, device_t);
static void ebus_probe_nomatch(device_t, device_t);
static int ebus_read_ivar(device_t, device_t, int, uintptr_t *);
static int ebus_write_ivar(device_t, device_t, int, uintptr_t);
static struct resource *ebus_alloc_resource(device_t, device_t, int, int *,
    u_long, u_long, u_long, u_int);
static struct resource_list *ebus_get_resource_list(device_t, device_t);

static struct ebus_devinfo *ebus_setup_dinfo(struct ebus_softc *,
    phandle_t, char *);
static void ebus_destroy_dinfo(struct ebus_devinfo *);
static int ebus_print_res(struct ebus_devinfo *);

static device_method_t ebus_methods[] = {
	/* Device interface */
	DEVMETHOD(device_probe,		ebus_probe),
	DEVMETHOD(device_attach,	bus_generic_attach),

	/* Bus interface */
	DEVMETHOD(bus_print_child,	ebus_print_child),
	DEVMETHOD(bus_probe_nomatch,	ebus_probe_nomatch),
	DEVMETHOD(bus_read_ivar,	ebus_read_ivar),
	DEVMETHOD(bus_write_ivar,	ebus_write_ivar),
	DEVMETHOD(bus_setup_intr, 	bus_generic_setup_intr),
	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
	DEVMETHOD(bus_alloc_resource,	ebus_alloc_resource),
	DEVMETHOD(bus_get_resource_list, ebus_get_resource_list),
	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
	DEVMETHOD(bus_release_resource,	bus_generic_rl_release_resource),
	DEVMETHOD(bus_get_resource,	bus_generic_rl_get_resource),

	{ 0, 0 }
};

static driver_t ebus_driver = {
	"ebus",
	ebus_methods,
	sizeof(struct ebus_softc),
};

static devclass_t ebus_devclass;

DRIVER_MODULE(ebus, pci, ebus_driver, ebus_devclass, 0, 0);

static int
ebus_probe(device_t dev)
{
	struct ebus_softc *sc;
	struct ebus_devinfo *edi;
	char name[10];
	device_t cdev;
	phandle_t node;
	char *cname;

	/*
	 * XXX: PCI specific! There should be a common cookie IVAR value for all
	 * buses! Does not really matter much here though...
	 */
	node = ofw_pci_find_node(pci_get_bus(dev), pci_get_slot(dev),
	    pci_get_function(dev));
	if (node == 0)
		return (ENXIO);

	/* Match a real ebus */
	OF_getprop(node, "name", &name, sizeof(name));
	if (pci_get_class(dev) != PCIC_BRIDGE ||
	    pci_get_vendor(dev) != 0x108e ||
	    strcmp(name, "ebus") != 0)
		return (ENXIO);

	if (pci_get_device(dev) == 0x1000)
		device_set_desc(dev, "PCI-EBus2 bridge");
	else if (pci_get_device(dev) == 0x1100)
		device_set_desc(dev, "PCI-EBus3 bridge");
	else
		return (ENXIO);

	device_printf(dev, "revision 0x%02x\n", pci_get_revid(dev));

	sc = device_get_softc(dev);
	sc->sc_node = node;

	sc->sc_nrange = OF_getprop_alloc(node, "ranges",
	    sizeof(*sc->sc_range), (void **)&sc->sc_range);
	if (sc->sc_nrange == -1)
		panic("ebus_attach: could not get ranges property");

	/*
	 * now attach all our children
	 */
	DPRINTF(EDB_CHILD, ("ebus node %08x, searching children...\n", node));
	for (node = OF_child(node); node > 0; node = OF_peer(node)) {
		if ((OF_getprop_alloc(node, "name", 1, (void **)&cname)) == -1)
			continue;

		if ((edi = ebus_setup_dinfo(sc, node, cname)) == NULL) {
			device_printf(dev, "<%s>: incomplete\n", cname);
			free(cname, M_OFWPROP);
			continue;
		}
		if ((cdev = device_add_child(dev, NULL, -1)) == NULL)
			panic("ebus_attach: device_add_child failed");
		device_set_ivars(cdev, edi);
	}
	return (0);
}

static int
ebus_print_child(device_t dev, device_t child)
{
	struct ebus_devinfo *edi;
	int retval;

	edi = device_get_ivars(child);
	retval = bus_print_child_header(dev, child);
	retval += ebus_print_res(edi);
	retval += bus_print_child_footer(dev, child);
	return (retval);
}

static void
ebus_probe_nomatch(device_t dev, device_t child)
{
	struct ebus_devinfo *edi;

	edi = device_get_ivars(child);
	device_printf(dev, "<%s>", edi->edi_name);
	ebus_print_res(edi);
	printf(" (no driver attached)\n");
}

static int
ebus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
	struct ebus_devinfo *dinfo;

	if ((dinfo = device_get_ivars(child)) == NULL)
		return (ENOENT);
	switch (which) {
	case EBUS_IVAR_COMPAT:
		*result = (uintptr_t)dinfo->edi_compat;
		break;
	case EBUS_IVAR_NAME:
		*result = (uintptr_t)dinfo->edi_name;
		break;
	case EBUS_IVAR_NODE:
		*result = dinfo->edi_node;
		break;
	default:
		return (ENOENT);
	}
	return 0;
}

static int
ebus_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
{
	struct ebus_devinfo *dinfo;

	if ((dinfo = device_get_ivars(child)) == NULL)
		return (ENOENT);
	switch (which) {
	case EBUS_IVAR_COMPAT:
	case EBUS_IVAR_NAME:
	case EBUS_IVAR_NODE:
		return (EINVAL);
	default:
		return (ENOENT);
	}
	return 0;
}

static struct resource *
ebus_alloc_resource(device_t bus, device_t child, int type, int *rid,
    u_long start, u_long end, u_long count, u_int flags)
{
	struct ebus_softc *sc;
	struct resource_list *rl;
	struct resource_list_entry *rle;
	struct ebus_devinfo *edi;
	int passthrough = (device_get_parent(child) != bus);
	int isdefault = (start == 0UL && end == ~0UL);
	u_long nstart, nend;
	int ptype;

	sc = (struct ebus_softc *)device_get_softc(bus);
	edi = device_get_ivars(child);
	rl = &edi->edi_rl;
	/*
	 * Map ebus ranges to PCI ranges. This may include changing the
	 * allocation type.
	 */
	ptype = type;
	nstart = start;
	nend = end;
	switch (type) {
	case SYS_RES_IOPORT:
		if (!isdefault && !passthrough) {
			ptype = ofw_isa_map_iorange(sc->sc_range, sc->sc_nrange,
			    &nstart, &nend);
		}
		if (isdefault && passthrough) {
			panic("ebus_alloc_resource: passthrough of default "
			    "allocation not supported");
		}
		break;
	case SYS_RES_IRQ:
		break;
	default:
		panic("ebus_alloc_resource: unsupported resource type %d",
		    type);
	}

	/*
	 * This inlines a modified resource_list_alloc(); this is needed
	 * because the resources need to be mapped into the bus space.
	 * This could be done when the resources are added to the resource
	 * lists, however doing it here is slightly more flexible.
	 */
	if (passthrough) {
		return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
		    ptype, rid, nstart, nend, count, flags));
	}

	rle = resource_list_find(rl, type, *rid);
	if (rle == NULL)
		return (NULL);		/* no resource of that type/rid */

	if (rle->res != NULL)
		panic("ebus_alloc_resource: resource entry is busy");

	if (isdefault) {
		nstart = rle->start;
		count = ulmax(count, rle->count);
		nend = ulmax(rle->end, nstart + count - 1);
		if (type == SYS_RES_IOPORT) {
			ptype = ofw_isa_map_iorange(sc->sc_range, sc->sc_nrange,
			    &nstart, &nend);
		}
	}

	rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
	    ptype, rid, nstart, nend, count, flags);

	return (rle->res);

}

static struct resource_list *
ebus_get_resource_list(device_t dev, device_t child)
{
	struct ebus_devinfo *edi;

	edi = device_get_ivars(child);
	return (&edi->edi_rl);
}

static struct ebus_devinfo *
ebus_setup_dinfo(struct ebus_softc *sc, phandle_t node, char *name)
{
	struct ebus_devinfo *edi;
	struct isa_regs *reg;
	u_int32_t *intrs, intr;
	u_int64_t start;
	int nreg, nintr, i;

	edi = malloc(sizeof(*edi), M_DEVBUF, M_ZERO | M_WAITOK);
	if (edi == NULL)
		return (NULL);
	resource_list_init(&edi->edi_rl);
	edi->edi_name = name;
	edi->edi_node = node;

	OF_getprop_alloc(node, "compat", 1, (void **)&edi->edi_compat);
	nreg = OF_getprop_alloc(node, "reg", sizeof(*reg), (void **)&reg);
	if (nreg == -1) {
		ebus_destroy_dinfo(edi);
		return (NULL);
	}
	for (i = 0; i < nreg; i++) {
		start = ISA_REG_PHYS(reg + i);
		/*
		 * XXX: use SYS_RES_IOPORT for compatability with ISA drivers -
		 * probably, SYS_RES_MEMORY would be more apporpriate, although
		 * that does not really matter.
		 */
		resource_list_add(&edi->edi_rl, SYS_RES_IOPORT, i,
		    start, start + reg[i].size - 1, reg[i].size);
	}

	nintr = OF_getprop_alloc(node, "interrupts",  sizeof(*intrs),
	    (void **)&intrs);
	for (i = 0; i < nintr; i++) {
		intr = ofw_bus_route_intr(node, intrs[i], ofw_pci_orb_callback);
		if (intr == ORIR_NOTFOUND) {
			panic("ebus_setup_dinfo: could not map ebus "
			    "interrupt %d", intrs[i]);
		}
		resource_list_add(&edi->edi_rl, SYS_RES_IRQ, i,
		    intr, intr, 1);
	}
	free(reg, M_OFWPROP);

	return (edi);
}

/*
 * NOTE: This does not free the name member (it is needed afterwards in some
 * cases).
 */
static void
ebus_destroy_dinfo(struct ebus_devinfo *edi)
{

	resource_list_free(&edi->edi_rl);
	free(edi, M_DEVBUF);
}


static int
ebus_print_res(struct ebus_devinfo *edi)
{
	int retval;

	retval = 0;
	retval += resource_list_print_type(&edi->edi_rl, "addr", SYS_RES_IOPORT,
	    "%#lx");
	retval += resource_list_print_type(&edi->edi_rl, "irq", SYS_RES_IRQ,
	    "%ld");
	return (retval);
}
OpenPOWER on IntegriCloud