if_tlp_eisa.c revision 1.3 
1/*	$NetBSD: if_tlp_eisa.c,v 1.3 1999/11/19 18:22:42 thorpej Exp $	*/
2
3/*-
4 * Copyright (c) 1999 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
9 * NASA Ames Research Center.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *	This product includes software developed by the NetBSD
22 *	Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 *    contributors may be used to endorse or promote products derived
25 *    from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40/*
41 * EISA bus front-end for the Digital Semiconductor ``Tulip'' (21x4x)
42 * Ethernet controller family driver.
43 */
44
45#include "opt_inet.h"
46#include "opt_ns.h"
47#include "bpfilter.h"
48
49#include <sys/param.h>
50#include <sys/systm.h>
51#include <sys/mbuf.h>
52#include <sys/malloc.h>
53#include <sys/kernel.h>
54#include <sys/socket.h>
55#include <sys/ioctl.h>
56#include <sys/errno.h>
57#include <sys/device.h>
58
59#include <net/if.h>
60#include <net/if_dl.h>
61#include <net/if_media.h>
62#include <net/if_ether.h>
63
64#if NBPFILTER > 0
65#include <net/bpf.h>
66#endif
67
68#ifdef INET
69#include <netinet/in.h>
70#include <netinet/if_inarp.h>
71#endif
72
73#ifdef NS
74#include <netns/ns.h>
75#include <netns/ns_if.h>
76#endif
77
78#include <machine/bus.h>
79#include <machine/intr.h>
80
81#include <dev/mii/miivar.h>
82#include <dev/mii/mii_bitbang.h>
83
84#include <dev/ic/tulipreg.h>
85#include <dev/ic/tulipvar.h>
86
87#include <dev/eisa/eisareg.h>
88#include <dev/eisa/eisavar.h>
89#include <dev/eisa/eisadevs.h>
90
91#include <dev/pci/pcireg.h>
92
93/*
94 * DE425 configuration registers; literal offsets from CSR base.
95 * This is effectively the 21040 PCI configuration space interleaved
96 * into the CSR space (CSRs are space 16 bytes on the DE425).
97 *
98 * What a cool address decoder hack they must have on that board...
99 */
100#define	DE425_CFID		0x08	/* Configuration ID */
101#define	DE425_CFCS		0x0c	/* Configuration Command-Status */
102#define	DE425_CFRV		0x18	/* Configuration Revision */
103#define	DE425_CFLT		0x1c	/* Configuration Latency Timer */
104#define	DE425_CBIO		0x28	/* Configuration Base I/O Address */
105#define	DE425_CFDA		0x2c	/* Configuration Driver Area */
106#define	DE425_ENETROM		0xc90	/* Offset in I/O space for ENETROM */
107#define	DE425_CFG0		0xc88	/* IRQ Configuration Register */
108
109struct tulip_eisa_softc {
110	struct tulip_softc sc_tulip;	/* real Tulip softc */
111
112	/* EISA-specific goo. */
113	void	*sc_ih;			/* interrupt handle */
114};
115
116int	tlp_eisa_match __P((struct device *, struct cfdata *, void *));
117void	tlp_eisa_attach __P((struct device *, struct device *, void *));
118
119struct cfattach tlp_eisa_ca = {
120	sizeof(struct tulip_eisa_softc), tlp_eisa_match, tlp_eisa_attach,
121};
122
123const int tlp_eisa_irqs[] = { 5, 9, 10, 11 };
124
125const struct tulip_eisa_product {
126	const char	*tep_eisaid;	/* EISA ID */
127	const char	*tep_name;	/* device name */
128	tulip_chip_t	tep_chip;	/* base Tulip chip type */
129} tlp_eisa_products[] = {
130	{ "DEC4250",			"DEC DE425",
131	  TULIP_CHIP_DE425 },
132
133	{ NULL,				NULL,
134	  TULIP_CHIP_INVALID },
135};
136
137const struct tulip_eisa_product *tlp_eisa_lookup
138    __P((const struct eisa_attach_args *));
139
140const struct tulip_eisa_product *
141tlp_eisa_lookup(ea)
142	const struct eisa_attach_args *ea;
143{
144	const struct tulip_eisa_product *tep;
145
146	for (tep = tlp_eisa_products;
147	     tep->tep_chip != TULIP_CHIP_INVALID; tep++)
148		if (strcmp(ea->ea_idstring, tep->tep_eisaid) == 0)
149			return (tep);
150	return (NULL);
151}
152
153int
154tlp_eisa_match(parent, match, aux)
155	struct device *parent;
156	struct cfdata *match;
157	void *aux;
158{
159	struct eisa_attach_args *ea = aux;
160
161	if (tlp_eisa_lookup(ea) != NULL)
162		return (1);
163
164	return (0);
165}
166
167void
168tlp_eisa_attach(parent, self, aux)
169	struct device *parent, *self;
170	void *aux;
171{
172	static const u_int8_t testpat[] =
173	    { 0xff, 0, 0x55, 0xaa, 0xff, 0, 0x55, 0xaa };
174	struct tulip_eisa_softc *esc = (void *) self;
175	struct tulip_softc *sc = &esc->sc_tulip;
176	struct eisa_attach_args *ea = aux;
177	eisa_chipset_tag_t ec = ea->ea_ec;
178	eisa_intr_handle_t ih;
179	bus_space_tag_t iot = ea->ea_iot;
180	bus_space_handle_t ioh;
181	const char *intrstr;
182	const struct tulip_eisa_product *tep;
183	u_int8_t enaddr[ETHER_ADDR_LEN], tmpbuf[sizeof(testpat)];
184	u_int32_t val;
185	int irq, i, cnt;
186
187	/*
188	 * Map the device.
189	 */
190	if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot),
191	    EISA_SLOT_SIZE, 0, &ioh)) {
192		printf(": unable to map I/O space\n");
193		return;
194	}
195
196	sc->sc_st = iot;
197	sc->sc_sh = ioh;
198
199	tep = tlp_eisa_lookup(ea);
200	if (tep == NULL) {
201		printf("\n");
202		panic("tlp_eisa_attach: impossible");
203	}
204	sc->sc_chip = tep->tep_chip;
205
206	/*
207	 * DE425's registers are 16 bytes long; the PCI configuration
208	 * space registers are interleaved in the I/O space.
209	 */
210	sc->sc_regshift = 4;
211
212	/*
213	 * CBIO must map the EISA slot, and I/O access and Bus Mastering
214	 * must be enabled.
215	 */
216	bus_space_write_4(iot, ioh, DE425_CBIO, EISA_SLOT_ADDR(ea->ea_slot));
217	bus_space_write_4(iot, ioh, DE425_CFCS,
218	    bus_space_read_4(iot, ioh, DE425_CFCS) |
219	    PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MASTER_ENABLE);
220
221	/*
222	 * Get revision info.
223	 */
224	sc->sc_rev = bus_space_read_4(iot, ioh, DE425_CFRV) & 0xff;
225
226	printf(": %s Ethernet, pass %d.%d\n",
227	    tep->tep_name, (sc->sc_rev >> 4) & 0xf, sc->sc_rev & 0xf);
228
229	sc->sc_dmat = ea->ea_dmat;
230
231	/*
232	 * EISA doesn't have a cache line register.
233	 */
234	sc->sc_cacheline = 0;
235
236	/*
237	 * Find the beginning of the Ethernet Address ROM.
238	 */
239	for (i = 0, cnt = 0; i < sizeof(testpat) && cnt < 32; cnt++) {
240		tmpbuf[i] = bus_space_read_1(iot, ioh, DE425_ENETROM);
241		if (tmpbuf[i] == testpat[i])
242			i++;
243		else
244			i = 0;
245	}
246
247	/*
248	 * ...and now read the contents of the Ethernet Address ROM.
249	 */
250	memset(sc->sc_srom, 0, sizeof(sc->sc_srom));
251	for (i = 0; i < 32; i++)
252		sc->sc_srom[i] = bus_space_read_1(iot, ioh, DE425_ENETROM);
253
254	/*
255	 * None of the DE425 boards have the new-style SROMs.
256	 */
257	if (tlp_parse_old_srom(sc, enaddr) == 0) {
258		printf("%s: unable to decode old-style SROM\n",
259		    sc->sc_dev.dv_xname);
260		return;
261	}
262
263	/*
264	 * All DE425 boards use the 21040 media switch.
265	 */
266	sc->sc_mediasw = &tlp_21040_mediasw;
267
268	/*
269	 * Figure out which IRQ we want to use, and determine of it's
270	 * edge- or level-triggered.
271	 */
272	val = bus_space_read_4(iot, ioh, DE425_CFG0);
273	irq = tlp_eisa_irqs[(val >> 1) & 0x03];
274
275	/*
276	 * Map and establish our interrupt.
277	 */
278	if (eisa_intr_map(ec, irq, &ih)) {
279		printf("%s: unable to map interrupt (%u)\n",
280		    sc->sc_dev.dv_xname, irq);
281		return;
282	}
283	intrstr = eisa_intr_string(ec, ih);
284	esc->sc_ih = eisa_intr_establish(ec, ih,
285	    (val & 0x01) ? IST_EDGE : IST_LEVEL, IPL_NET, tlp_intr, sc);
286	if (esc->sc_ih == NULL) {
287		printf("%s: unable to establish interrupt",
288		    sc->sc_dev.dv_xname);
289		if (intrstr != NULL)
290			printf(" at %s", intrstr);
291		printf("\n");
292		return;
293	}
294	if (intrstr != NULL)
295		printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname,
296		    intrstr);
297
298	/*
299	 * Finish off the attach.
300	 */
301	tlp_attach(sc, enaddr);
302}
303