summaryrefslogtreecommitdiffstats
path: root/sys/dev/le/if_le_ledma.c
blob: 5ca435eb0cbc02707f9ac1f7396e12405ef0d827 (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
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
/*	$NetBSD: if_le_ledma.c,v 1.26 2005/12/11 12:23:44 christos Exp $	*/

/*-
 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Charles M. Hannum; Jason R. Thorpe of the Numerical Aerospace
 * Simulation Facility, NASA Ames Research Center; Paul Kranenburg.
 *
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the NetBSD
 *	Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``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 FOUNDATION OR CONTRIBUTORS
 * 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.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <sys/socket.h>

#include <dev/ofw/ofw_bus.h>

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

#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_media.h>

#include <sparc64/sbus/lsi64854reg.h>
#include <sparc64/sbus/lsi64854var.h>

#include <dev/le/lancereg.h>
#include <dev/le/lancevar.h>
#include <dev/le/am7990var.h>

#define	LEDMA_ALIGNMENT	8		/* ring desc. alignmet for NCR92C990 */
#define	LEDMA_BOUNDARY	(16*1024*1024)	/* must not cross 16MB boundary */
#define	LEDMA_MEMSIZE	(16*1024)	/* LANCE memory size */
#define	LEREG1_RDP	0		/* Register Data Port */
#define	LEREG1_RAP	2		/* Register Address Port */

struct le_dma_softc {
	struct am7990_softc	sc_am7990;	/* glue to MI code */

	int			sc_rrid;
	struct resource		*sc_rres;
	bus_space_tag_t		sc_regt;
	bus_space_handle_t	sc_regh;

	int			sc_irid;
	struct resource		*sc_ires;
	void			*sc_ih;

	bus_dma_tag_t		sc_dmat;
	bus_dmamap_t		sc_dmam;
	bus_addr_t		sc_laddr;	/* LANCE DMA address */

	struct lsi64854_softc	*sc_dma;	/* pointer to DMA engine */
};

static device_probe_t le_dma_probe;
static device_attach_t le_dma_attach;
static device_detach_t le_dma_detach;
static device_resume_t le_dma_resume;
static device_suspend_t le_dma_suspend;

static device_method_t le_dma_methods[] = {
	/* Device interface */
	DEVMETHOD(device_probe,		le_dma_probe),
	DEVMETHOD(device_attach,	le_dma_attach),
	DEVMETHOD(device_detach,	le_dma_detach),
	/* We can just use the suspend method here. */
	DEVMETHOD(device_shutdown,	le_dma_suspend),
	DEVMETHOD(device_suspend,	le_dma_suspend),
	DEVMETHOD(device_resume,	le_dma_resume),

	{ 0, 0 }
};

DEFINE_CLASS_0(le, le_dma_driver, le_dma_methods, sizeof(struct le_dma_softc));
DRIVER_MODULE(le, dma, le_dma_driver, le_devclass, 0, 0);
MODULE_DEPEND(le, ether, 1, 1, 1);

/*
 * Media types supported
 */
static const int le_dma_supmedia[] = {
	IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, 0),
	IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, 0),
	IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, 0)
};

static void le_dma_wrcsr(struct lance_softc *, uint16_t, uint16_t);
static uint16_t le_dma_rdcsr(struct lance_softc *, uint16_t);
static void le_dma_setutp(struct lance_softc *);
static void le_dma_setaui(struct lance_softc *);
static int le_dma_supmediachange(struct lance_softc *);
static void le_dma_supmediastatus(struct lance_softc *, struct ifmediareq *);
static void le_dma_hwreset(struct lance_softc *);
static int le_dma_hwintr(struct lance_softc *);
static void le_dma_nocarrier(struct lance_softc *);
static bus_dmamap_callback_t le_dma_dma_callback;

static void
le_dma_wrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
{
	struct le_dma_softc *lesc = (struct le_dma_softc *)sc;

	bus_space_write_2(lesc->sc_regt, lesc->sc_regh, LEREG1_RAP, port);
	bus_space_barrier(lesc->sc_regt, lesc->sc_regh, LEREG1_RAP, 2,
	    BUS_SPACE_BARRIER_WRITE);
	bus_space_write_2(lesc->sc_regt, lesc->sc_regh, LEREG1_RDP, val);
}

static uint16_t
le_dma_rdcsr(struct lance_softc *sc, uint16_t port)
{
	struct le_dma_softc *lesc = (struct le_dma_softc *)sc;

	bus_space_write_2(lesc->sc_regt, lesc->sc_regh, LEREG1_RAP, port);
	bus_space_barrier(lesc->sc_regt, lesc->sc_regh, LEREG1_RAP, 2,
	    BUS_SPACE_BARRIER_WRITE);
	return (bus_space_read_2(lesc->sc_regt, lesc->sc_regh, LEREG1_RDP));
}

static void
le_dma_setutp(struct lance_softc *sc)
{
	struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma;

	L64854_SCSR(dma, L64854_GCSR(dma) | E_TP_AUI);
	DELAY(20000);	/* We must not touch the LANCE chip for 20ms. */
}

static void
le_dma_setaui(struct lance_softc *sc)
{
	struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma;

	L64854_SCSR(dma, L64854_GCSR(dma) & ~E_TP_AUI);
	DELAY(20000);	/* We must not touch the LANCE chip for 20ms. */
}

static int
le_dma_supmediachange(struct lance_softc *sc)
{
	struct ifmedia *ifm = &sc->sc_media;

	if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
		return (EINVAL);

	/*
	 * Switch to the selected media. If autoselect is set, we don't
	 * really have to do anything. We'll switch to the other media
	 * when we detect loss of carrier.
	 */
	switch (IFM_SUBTYPE(ifm->ifm_media)) {
	case IFM_10_T:
		le_dma_setutp(sc);
		break;

	case IFM_10_5:
		le_dma_setaui(sc);
		break;

	case IFM_AUTO:
		break;

	default:
		return (EINVAL);
	}

	return (0);
}

static void
le_dma_supmediastatus(struct lance_softc *sc, struct ifmediareq *ifmr)
{
	struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma;

	/*
	 * Notify the world which media we're currently using.
	 */
	if (L64854_GCSR(dma) & E_TP_AUI)
		ifmr->ifm_active = IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, 0);
	else
		ifmr->ifm_active = IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, 0);
}

static void
le_dma_hwreset(struct lance_softc *sc)
{
	struct le_dma_softc *lesc = (struct le_dma_softc *)sc;
	struct lsi64854_softc *dma = lesc->sc_dma;
	uint32_t aui_bit, csr;

	/*
	 * Reset DMA channel.
	 */
	csr = L64854_GCSR(dma);
	aui_bit = csr & E_TP_AUI;
	DMA_RESET(dma);

	/* Write bits 24-31 of Lance address. */
	bus_space_write_4(dma->sc_regt, dma->sc_regh, L64854_REG_ENBAR,
	    lesc->sc_laddr & 0xff000000);

	DMA_ENINTR(dma);

	/*
	 * Disable E-cache invalidates on chip writes.
	 * Retain previous cable selection bit.
	 */
	csr = L64854_GCSR(dma);
	csr |= (E_DSBL_WR_INVAL | aui_bit);
	L64854_SCSR(dma, csr);
	DELAY(20000);	/* We must not touch the LANCE chip for 20ms. */
}

static int
le_dma_hwintr(struct lance_softc *sc)
{
	struct le_dma_softc *lesc = (struct le_dma_softc *)sc;
	struct lsi64854_softc *dma = lesc->sc_dma;

	return (DMA_INTR(dma));
}

static void
le_dma_nocarrier(struct lance_softc *sc)
{
	struct le_dma_softc *lesc = (struct le_dma_softc *)sc;

	/*
	 * Check if the user has requested a certain cable type, and
	 * if so, honor that request.
	 */

	if (L64854_GCSR(lesc->sc_dma) & E_TP_AUI) {
		switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) {
		case IFM_10_5:
		case IFM_AUTO:
			if_printf(sc->sc_ifp, "lost carrier on UTP port, "
			    "switching to AUI port\n");
			le_dma_setaui(sc);
		}
	} else {
		switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) {
		case IFM_10_T:
		case IFM_AUTO:
			if_printf(sc->sc_ifp, "lost carrier on AUI port, "
			    "switching to UTP port\n");
			le_dma_setutp(sc);
		}
	}
}

static void
le_dma_dma_callback(void *xsc, bus_dma_segment_t *segs, int nsegs, int error)
{
	struct le_dma_softc *lesc = (struct le_dma_softc *)xsc;

	if (error != 0)
		return;
	KASSERT(nsegs == 1, ("%s: bad DMA segment count", __func__));
	lesc->sc_laddr = segs[0].ds_addr;
}

static int
le_dma_probe(device_t dev)
{

	if (strcmp(ofw_bus_get_name(dev), "le") == 0) {
		device_set_desc(dev, "LANCE Ethernet");
		return (BUS_PROBE_DEFAULT);
	}
	return (ENXIO);
}

static int
le_dma_attach(device_t dev)
{
	struct le_dma_softc *lesc;
	struct lsi64854_softc *dma;
	struct lance_softc *sc;
	int error;

	lesc = device_get_softc(dev);
	sc = &lesc->sc_am7990.lsc;

	LE_LOCK_INIT(sc, device_get_nameunit(dev));

	/*
	 * Establish link to `ledma' device.
	 * XXX hackery.
	 */
	dma = (struct lsi64854_softc *)device_get_softc(device_get_parent(dev));
	lesc->sc_dma = dma;
	lesc->sc_dma->sc_client = lesc;

	lesc->sc_rrid = 0;
	lesc->sc_rres = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
	    &lesc->sc_rrid, RF_ACTIVE);
	if (lesc->sc_rres == NULL) {
		device_printf(dev, "cannot allocate registers\n");
		error = ENXIO;
		goto fail_mtx;
	}
	lesc->sc_regt = rman_get_bustag(lesc->sc_rres);
	lesc->sc_regh = rman_get_bushandle(lesc->sc_rres);

	lesc->sc_irid = 0;
	if ((lesc->sc_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ,
	    &lesc->sc_irid, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
		device_printf(dev, "cannot allocate interrupt\n");
		error = ENXIO;
		goto fail_rres;
	}

	sc->sc_memsize = LEDMA_MEMSIZE;
	error = bus_dma_tag_create(
	    dma->sc_parent_dmat,	/* parent */
	    LEDMA_ALIGNMENT,		/* alignment */
	    LEDMA_BOUNDARY,		/* boundary */
	    BUS_SPACE_MAXADDR_32BIT,	/* lowaddr */
	    BUS_SPACE_MAXADDR,		/* highaddr */
	    NULL, NULL,			/* filter, filterarg */
	    sc->sc_memsize,		/* maxsize */
	    1,				/* nsegments */
	    sc->sc_memsize,		/* maxsegsize */
	    0,				/* flags */
	    NULL, NULL,			/* lockfunc, lockarg */
	    &lesc->sc_dmat);
	if (error != 0) {
		device_printf(dev, "cannot allocate buffer DMA tag\n");
		goto fail_ires;
	}

	error = bus_dmamem_alloc(lesc->sc_dmat, (void **)&sc->sc_mem,
	    BUS_DMA_WAITOK | BUS_DMA_COHERENT, &lesc->sc_dmam);
	if (error != 0) {
		device_printf(dev, "cannot allocate DMA buffer memory\n");
		goto fail_dtag;
	}

	lesc->sc_laddr = 0;
	error = bus_dmamap_load(lesc->sc_dmat, lesc->sc_dmam, sc->sc_mem,
	    sc->sc_memsize, le_dma_dma_callback, lesc, 0);
	if (error != 0 || lesc->sc_laddr == 0) {
                device_printf(dev, "cannot load DMA buffer map\n");
		goto fail_dmem;
	}

	sc->sc_addr = lesc->sc_laddr & 0xffffff;
	sc->sc_flags = 0;
	sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON;

	sc->sc_mediachange = le_dma_supmediachange;
	sc->sc_mediastatus = le_dma_supmediastatus;
	sc->sc_supmedia = le_dma_supmedia;
	sc->sc_nsupmedia = sizeof(le_dma_supmedia) / sizeof(le_dma_supmedia[0]);
	sc->sc_defaultmedia = le_dma_supmedia[0];

	OF_getetheraddr(dev, sc->sc_enaddr);

	sc->sc_copytodesc = lance_copytobuf_contig;
	sc->sc_copyfromdesc = lance_copyfrombuf_contig;
	sc->sc_copytobuf = lance_copytobuf_contig;
	sc->sc_copyfrombuf = lance_copyfrombuf_contig;
	sc->sc_zerobuf = lance_zerobuf_contig;

	sc->sc_rdcsr = le_dma_rdcsr;
	sc->sc_wrcsr = le_dma_wrcsr;
	sc->sc_hwreset = le_dma_hwreset;
	sc->sc_hwintr = le_dma_hwintr;
	sc->sc_nocarrier = le_dma_nocarrier;

	error = am7990_config(&lesc->sc_am7990, device_get_name(dev),
	    device_get_unit(dev));
	if (error != 0) {
		device_printf(dev, "cannot attach Am7990\n");
		goto fail_dmap;
	}

	error = bus_setup_intr(dev, lesc->sc_ires, INTR_TYPE_NET | INTR_MPSAFE,
	    am7990_intr, sc, &lesc->sc_ih);
	if (error != 0) {
		device_printf(dev, "cannot set up interrupt\n");
		goto fail_am7990;
	}

	return (0);

 fail_am7990:
	am7990_detach(&lesc->sc_am7990);
 fail_dmap:
	bus_dmamap_unload(lesc->sc_dmat, lesc->sc_dmam);
 fail_dmem:
	bus_dmamem_free(lesc->sc_dmat, sc->sc_mem, lesc->sc_dmam);
 fail_dtag:
	bus_dma_tag_destroy(lesc->sc_dmat);
 fail_ires:
	bus_release_resource(dev, SYS_RES_IRQ, lesc->sc_irid, lesc->sc_ires);
 fail_rres:
	bus_release_resource(dev, SYS_RES_MEMORY, lesc->sc_rrid, lesc->sc_rres);
 fail_mtx:
	LE_LOCK_DESTROY(sc);
	return (error);
}

static int
le_dma_detach(device_t dev)
{
	struct le_dma_softc *lesc;
	struct lance_softc *sc;

	lesc = device_get_softc(dev);
	sc = &lesc->sc_am7990.lsc;

	bus_teardown_intr(dev, lesc->sc_ires, lesc->sc_ih);
	am7990_detach(&lesc->sc_am7990);
	bus_dmamap_unload(lesc->sc_dmat, lesc->sc_dmam);
	bus_dmamem_free(lesc->sc_dmat, sc->sc_mem, lesc->sc_dmam);
	bus_dma_tag_destroy(lesc->sc_dmat);
	bus_release_resource(dev, SYS_RES_IRQ, lesc->sc_irid, lesc->sc_ires);
	bus_release_resource(dev, SYS_RES_MEMORY, lesc->sc_rrid, lesc->sc_rres);
	LE_LOCK_DESTROY(sc);

	return (0);
}

static int
le_dma_suspend(device_t dev)
{
	struct le_dma_softc *lesc;

	lesc = device_get_softc(dev);

	lance_suspend(&lesc->sc_am7990.lsc);

	return (0);
}

static int
le_dma_resume(device_t dev)
{
	struct le_dma_softc *lesc;

	lesc = device_get_softc(dev);

	lance_resume(&lesc->sc_am7990.lsc);

	return (0);
}
OpenPOWER on IntegriCloud