if_fmv_isa.c revision 1.6 
1/*	$NetBSD: if_fmv_isa.c,v 1.6 2005/12/24 23:41:33 perry Exp $	*/
2
3/*
4 * All Rights Reserved, Copyright (C) Fujitsu Limited 1995
5 *
6 * This software may be used, modified, copied, distributed, and sold, in
7 * both source and binary form provided that the above copyright, these
8 * terms and the following disclaimer are retained.  The name of the author
9 * and/or the contributor may not be used to endorse or promote products
10 * derived from this software without specific prior written permission.
11 *
12 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND THE CONTRIBUTOR ``AS IS'' AND
13 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
14 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
15 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR THE CONTRIBUTOR BE LIABLE
16 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
17 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
18 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION.
19 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
20 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
21 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
22 * SUCH DAMAGE.
23 */
24
25/*
26 * Portions copyright (C) 1993, David Greenman.  This software may be used,
27 * modified, copied, distributed, and sold, in both source and binary form
28 * provided that the above copyright and these terms are retained.  Under no
29 * circumstances is the author responsible for the proper functioning of this
30 * software, nor does the author assume any responsibility for damages
31 * incurred with its use.
32 */
33
34#include <sys/cdefs.h>
35__KERNEL_RCSID(0, "$NetBSD: if_fmv_isa.c,v 1.6 2005/12/24 23:41:33 perry Exp $");
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/device.h>
40
41#include <net/if.h>
42#include <net/if_ether.h>
43#include <net/if_media.h>
44
45#include <machine/bus.h>
46#include <machine/intr.h>
47
48#include <dev/ic/mb86960reg.h>
49#include <dev/ic/mb86960var.h>
50#include <dev/ic/fmvreg.h>
51#include <dev/ic/fmvvar.h>
52
53#include <dev/isa/isavar.h>
54
55int	fmv_isa_match(struct device *, struct cfdata *, void *);
56void	fmv_isa_attach(struct device *, struct device *, void *);
57
58struct fmv_isa_softc {
59	struct	mb86960_softc sc_mb86960;	/* real "mb86960" softc */
60
61	/* ISA-specific goo. */
62	void	*sc_ih;				/* interrupt cookie */
63};
64
65CFATTACH_DECL(fmv_isa, sizeof(struct fmv_isa_softc),
66    fmv_isa_match, fmv_isa_attach, NULL, NULL);
67
68struct fe_simple_probe_struct {
69	uint8_t port;	/* Offset from the base I/O address. */
70	uint8_t mask;	/* Bits to be checked. */
71	uint8_t bits;	/* Values to be compared against. */
72};
73
74static inline int fe_simple_probe(bus_space_tag_t, bus_space_handle_t,
75    struct fe_simple_probe_struct const *);
76static int fmv_find(bus_space_tag_t, bus_space_handle_t, int *, int *);
77
78static int const fmv_iomap[8] = {
79	0x220, 0x240, 0x260, 0x280, 0x2A0, 0x2C0, 0x300, 0x340
80};
81#define NFMV_IOMAP (sizeof (fmv_iomap) / sizeof (fmv_iomap[0]))
82#define FMV_NPORTS 0x20
83
84#ifdef FMV_DEBUG
85#define DPRINTF	printf
86#else
87#define DPRINTF	while (/* CONSTCOND */0) printf
88#endif
89
90/*
91 * Hardware probe routines.
92 */
93
94/*
95 * Determine if the device is present.
96 */
97int
98fmv_isa_match(struct device *parent, struct cfdata *match, void *aux)
99{
100	struct isa_attach_args *ia = aux;
101	bus_space_tag_t iot = ia->ia_iot;
102	bus_space_handle_t ioh;
103	int i, iobase, irq, rv = 0;
104	uint8_t myea[ETHER_ADDR_LEN];
105
106	if (ia->ia_nio < 1)
107		return 0;
108	if (ia->ia_nirq < 1)
109		return 0;
110
111	if (ISA_DIRECT_CONFIG(ia))
112		return 0;
113
114	/* Disallow wildcarded values. */
115	if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
116		return 0;
117
118	/*
119	 * See if the sepcified address is valid for FMV-180 series.
120	 */
121	for (i = 0; i < NFMV_IOMAP; i++)
122		if (fmv_iomap[i] == ia->ia_io[0].ir_addr)
123			break;
124	if (i == NFMV_IOMAP) {
125		DPRINTF("fmv_match: unknown iobase 0x%x\n",
126		    ia->ia_io[0].ir_addr);
127		return 0;
128	}
129
130	/* Map i/o space. */
131	if (bus_space_map(iot, ia->ia_io[0].ir_addr, FMV_NPORTS, 0, &ioh)) {
132		DPRINTF("fmv_match: couldn't map iospace 0x%x\n",
133		    ia->ia_io[0].ir_addr);
134		return 0;
135	}
136
137	if (fmv_find(iot, ioh, &iobase, &irq) == 0) {
138		DPRINTF("fmv_match: fmv_find failed\n");
139		goto out;
140	}
141
142	if (iobase != ia->ia_io[0].ir_addr) {
143		DPRINTF("fmv_match: unexpected iobase in board: 0x%x\n",
144		    iobase);
145		goto out;
146	}
147
148	if (fmv_detect(iot, ioh, myea) == 0) { /* XXX necessary? */
149		DPRINTF("fmv_match: fmv_detect failed\n");
150		goto out;
151	}
152
153	if (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ) {
154		if (ia->ia_irq[0].ir_irq != irq) {
155			printf("fmv_match: irq mismatch; "
156			    "kernel configured %d != board configured %d\n",
157			    ia->ia_irq[0].ir_irq, irq);
158			goto out;
159		}
160	} else
161		ia->ia_irq[0].ir_irq = irq;
162
163	ia->ia_nio = 1;
164	ia->ia_io[0].ir_size = FMV_NPORTS;
165
166	ia->ia_nirq = 1;
167
168	ia->ia_niomem = 0;
169	ia->ia_ndrq = 0;
170
171	rv = 1;
172
173 out:
174	bus_space_unmap(iot, ioh, FMV_NPORTS);
175	return rv;
176}
177
178/*
179 * Check for specific bits in specific registers have specific values.
180 */
181static inline int
182fe_simple_probe(bus_space_tag_t iot, bus_space_handle_t ioh,
183    struct fe_simple_probe_struct const *sp)
184{
185	uint8_t val;
186	struct fe_simple_probe_struct const *p;
187
188	for (p = sp; p->mask != 0; p++) {
189		val = bus_space_read_1(iot, ioh, p->port);
190		if ((val & p->mask) != p->bits) {
191			DPRINTF("fe_simple_probe: %x & %x != %x\n",
192			    val, p->mask, p->bits);
193			return 0;
194		}
195	}
196
197	return 1;
198}
199
200/*
201 * Hardware (vendor) specific probe routines.
202 */
203
204/*
205 * Probe Fujitsu FMV-180 series boards and get iobase and irq from
206 * board.
207 */
208static int
209fmv_find(bus_space_tag_t iot, bus_space_handle_t ioh, int *iobase, int *irq)
210{
211	uint8_t config;
212	static int const fmv_irqmap[4] = { 3, 7, 10, 15 };
213	static struct fe_simple_probe_struct const probe_table[] = {
214		{ FE_DLCR2, 0x70, 0x00 },
215		{ FE_DLCR4, 0x08, 0x00 },
216	    /*	{ FE_DLCR5, 0x80, 0x00 },	Doesn't work. */
217
218		{ FE_FMV0, FE_FMV0_MAGIC_MASK, FE_FMV0_MAGIC_VALUE },
219		{ FE_FMV1, FE_FMV1_MAGIC_MASK, FE_FMV1_MAGIC_VALUE },
220		{ FE_FMV3, FE_FMV3_EXTRA_MASK, FE_FMV3_EXTRA_VALUE },
221#if 1
222	/*
223	 * Test *vendor* part of the station address for Fujitsu.
224	 * The test will gain reliability of probe process, but
225	 * it rejects FMV-180 clone boards manufactured by other vendors.
226	 * We have to turn the test off when such cards are made available.
227	 */
228		{ FE_FMV4, 0xFF, 0x00 },
229		{ FE_FMV5, 0xFF, 0x00 },
230		{ FE_FMV6, 0xFF, 0x0E },
231#else
232	/*
233	 * We can always verify the *first* 2 bits (in Ehternet
234	 * bit order) are "no multicast" and "no local" even for
235	 * unknown vendors.
236	 */
237		{ FE_FMV4, 0x03, 0x00 },
238#endif
239		{ 0 }
240	};
241
242	/* Simple probe. */
243	if (fe_simple_probe(iot, ioh, probe_table) != 0)
244		return 0;
245
246	/* Check if our I/O address matches config info on EEPROM. */
247	config = bus_space_read_1(iot, ioh, FE_FMV2);
248	*iobase = fmv_iomap[(config & FE_FMV2_ADDR) >> FE_FMV2_ADDR_SHIFT];
249
250	/*
251	 * Determine which IRQ to be used.
252	 *
253	 * In this version, we always get an IRQ assignment from the
254	 * FMV-180's configuration EEPROM, ignoring that specified in
255	 * config file.
256	 */
257	*irq = fmv_irqmap[(config & FE_FMV2_IRQ) >> FE_FMV2_IRQ_SHIFT];
258
259	return 1;
260}
261
262void
263fmv_isa_attach(struct device *parent, struct device *self, void *aux)
264{
265	struct fmv_isa_softc *isc = (struct fmv_isa_softc *)self;
266	struct mb86960_softc *sc = &isc->sc_mb86960;
267	struct isa_attach_args *ia = aux;
268	bus_space_tag_t iot = ia->ia_iot;
269	bus_space_handle_t ioh;
270
271	/* Map i/o space. */
272	if (bus_space_map(iot, ia->ia_io[0].ir_addr, FMV_NPORTS, 0, &ioh)) {
273		printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname);
274		return;
275	}
276
277	sc->sc_bst = iot;
278	sc->sc_bsh = ioh;
279
280	fmv_attach(sc);
281
282	/* Establish the interrupt handler. */
283	isc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
284	    IST_EDGE, IPL_NET, mb86960_intr, sc);
285	if (isc->sc_ih == NULL)
286		printf("%s: couldn't establish interrupt handler\n",
287		    sc->sc_dev.dv_xname);
288}
289