if_tlp_eisa.c revision 1.20 
1/*	$NetBSD: if_tlp_eisa.c,v 1.20 2008/04/06 08:54:43 cegger Exp $	*/
2
3/*-
4 * Copyright (c) 1999, 2000 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 <sys/cdefs.h>
46__KERNEL_RCSID(0, "$NetBSD: if_tlp_eisa.c,v 1.20 2008/04/06 08:54:43 cegger Exp $");
47
48#include "opt_inet.h"
49#include "bpfilter.h"
50
51#include <sys/param.h>
52#include <sys/systm.h>
53#include <sys/mbuf.h>
54#include <sys/malloc.h>
55#include <sys/kernel.h>
56#include <sys/socket.h>
57#include <sys/ioctl.h>
58#include <sys/errno.h>
59#include <sys/device.h>
60
61#include <machine/endian.h>
62
63#include <net/if.h>
64#include <net/if_dl.h>
65#include <net/if_media.h>
66#include <net/if_ether.h>
67
68#if NBPFILTER > 0
69#include <net/bpf.h>
70#endif
71
72#ifdef INET
73#include <netinet/in.h>
74#include <netinet/if_inarp.h>
75#endif
76
77
78#include <sys/bus.h>
79#include <sys/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
116static int	tlp_eisa_match(struct device *, struct cfdata *, void *);
117static void	tlp_eisa_attach(struct device *, struct device *, void *);
118
119CFATTACH_DECL(tlp_eisa, sizeof(struct tulip_eisa_softc),
120    tlp_eisa_match, tlp_eisa_attach, NULL, NULL);
121
122static const int tlp_eisa_irqs[] = { 5, 9, 10, 11 };
123
124static const struct tulip_eisa_product {
125	const char	*tep_eisaid;	/* EISA ID */
126	const char	*tep_name;	/* device name */
127	tulip_chip_t	tep_chip;	/* base Tulip chip type */
128} tlp_eisa_products[] = {
129	{ "DEC4250",			"DEC DE425",
130	  TULIP_CHIP_DE425 },
131
132	{ NULL,				NULL,
133	  TULIP_CHIP_INVALID },
134};
135
136static const struct tulip_eisa_product *
137tlp_eisa_lookup(const struct eisa_attach_args *ea)
138{
139	const struct tulip_eisa_product *tep;
140
141	for (tep = tlp_eisa_products;
142	     tep->tep_chip != TULIP_CHIP_INVALID; tep++)
143		if (strcmp(ea->ea_idstring, tep->tep_eisaid) == 0)
144			return (tep);
145	return (NULL);
146}
147
148static int
149tlp_eisa_match(struct device *parent, struct cfdata *match,
150    void *aux)
151{
152	struct eisa_attach_args *ea = aux;
153
154	if (tlp_eisa_lookup(ea) != NULL)
155		return (1);
156
157	return (0);
158}
159
160static void
161tlp_eisa_attach(struct device *parent, struct device *self, void *aux)
162{
163	static const u_int8_t testpat[] =
164	    { 0xff, 0, 0x55, 0xaa, 0xff, 0, 0x55, 0xaa };
165	struct tulip_eisa_softc *esc = device_private(self);
166	struct tulip_softc *sc = &esc->sc_tulip;
167	struct eisa_attach_args *ea = aux;
168	eisa_chipset_tag_t ec = ea->ea_ec;
169	eisa_intr_handle_t ih;
170	bus_space_tag_t iot = ea->ea_iot;
171	bus_space_handle_t ioh;
172	const char *intrstr;
173	const struct tulip_eisa_product *tep;
174	u_int8_t enaddr[ETHER_ADDR_LEN], tmpbuf[sizeof(testpat)];
175	u_int32_t val;
176	int irq, i, cnt;
177
178	/*
179	 * Map the device.
180	 */
181	if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot),
182	    EISA_SLOT_SIZE, 0, &ioh)) {
183		printf(": unable to map I/O space\n");
184		return;
185	}
186
187	sc->sc_st = iot;
188	sc->sc_sh = ioh;
189
190	tep = tlp_eisa_lookup(ea);
191	if (tep == NULL) {
192		printf("\n");
193		panic("tlp_eisa_attach: impossible");
194	}
195	sc->sc_chip = tep->tep_chip;
196
197	/*
198	 * DE425's registers are 16 bytes long; the PCI configuration
199	 * space registers are interleaved in the I/O space.
200	 */
201	sc->sc_regshift = 4;
202
203	/*
204	 * No power management hooks.
205	 */
206	sc->sc_flags |= TULIPF_ENABLED;
207
208	/*
209	 * CBIO must map the EISA slot, and I/O access and Bus Mastering
210	 * must be enabled.
211	 */
212	bus_space_write_4(iot, ioh, DE425_CBIO, EISA_SLOT_ADDR(ea->ea_slot));
213	bus_space_write_4(iot, ioh, DE425_CFCS,
214	    bus_space_read_4(iot, ioh, DE425_CFCS) |
215	    PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MASTER_ENABLE);
216
217	/*
218	 * Get revision info.
219	 */
220	sc->sc_rev = bus_space_read_4(iot, ioh, DE425_CFRV) & 0xff;
221
222	printf(": %s Ethernet, pass %d.%d\n",
223	    tep->tep_name, (sc->sc_rev >> 4) & 0xf, sc->sc_rev & 0xf);
224
225	sc->sc_dmat = ea->ea_dmat;
226
227	/*
228	 * EISA doesn't have a cache line register.
229	 */
230	sc->sc_cacheline = 0;
231
232	/*
233	 * Find the beginning of the Ethernet Address ROM.
234	 */
235	for (i = 0, cnt = 0; i < sizeof(testpat) && cnt < 32; cnt++) {
236		tmpbuf[i] = bus_space_read_1(iot, ioh, DE425_ENETROM);
237		if (tmpbuf[i] == testpat[i])
238			i++;
239		else
240			i = 0;
241	}
242
243	/*
244	 * ...and now read the contents of the Ethernet Address ROM.
245	 */
246	sc->sc_srom = malloc(32, M_DEVBUF, M_WAITOK|M_ZERO);
247	for (i = 0; i < 32; i++)
248		sc->sc_srom[i] = bus_space_read_1(iot, ioh, DE425_ENETROM);
249
250	/*
251	 * None of the DE425 boards have the new-style SROMs.
252	 */
253	if (tlp_parse_old_srom(sc, enaddr) == 0) {
254		aprint_error_dev(&sc->sc_dev, "unable to decode old-style SROM\n");
255		return;
256	}
257
258	/*
259	 * All DE425 boards use the 21040 media switch.
260	 */
261	sc->sc_mediasw = &tlp_21040_mediasw;
262
263	/*
264	 * Figure out which IRQ we want to use, and determine of it's
265	 * edge- or level-triggered.
266	 */
267	val = bus_space_read_4(iot, ioh, DE425_CFG0);
268	irq = tlp_eisa_irqs[(val >> 1) & 0x03];
269
270	/*
271	 * Map and establish our interrupt.
272	 */
273	if (eisa_intr_map(ec, irq, &ih)) {
274		aprint_error_dev(&sc->sc_dev, "unable to map interrupt (%u)\n",
275		    irq);
276		return;
277	}
278	intrstr = eisa_intr_string(ec, ih);
279	esc->sc_ih = eisa_intr_establish(ec, ih,
280	    (val & 0x01) ? IST_EDGE : IST_LEVEL, IPL_NET, tlp_intr, sc);
281	if (esc->sc_ih == NULL) {
282		aprint_error_dev(&sc->sc_dev, "unable to establish interrupt");
283		if (intrstr != NULL)
284			printf(" at %s", intrstr);
285		printf("\n");
286		return;
287	}
288	if (intrstr != NULL)
289		printf("%s: interrupting at %s\n", device_xname(&sc->sc_dev),
290		    intrstr);
291
292	/*
293	 * Finish off the attach.
294	 */
295	tlp_attach(sc, enaddr);
296}
297