if_fmv_isa.c revision 1.3 
1/*	$NetBSD: if_fmv_isa.c,v 1.3 2004/09/14 20:20:47 drochner 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 1.3 2004/09/14 20:20:47 drochner 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 __P((struct device *, struct cfdata *, void *));
56void	fmv_isa_attach __P((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	u_int8_t port;	/* Offset from the base I/O address. */
70	u_int8_t mask;	/* Bits to be checked. */
71	u_int8_t bits;	/* Values to be compared against. */
72};
73
74static __inline__ int fe_simple_probe __P((bus_space_tag_t,
75    bus_space_handle_t, struct fe_simple_probe_struct const *));
76static int fmv_find __P((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/*
85 * Hardware probe routines.
86 */
87
88/*
89 * Determine if the device is present.
90 */
91int
92fmv_isa_match(parent, match, aux)
93	struct device *parent;
94	struct cfdata *match;
95	void *aux;
96{
97	struct isa_attach_args *ia = aux;
98	bus_space_tag_t iot = ia->ia_iot;
99	bus_space_handle_t ioh;
100	int i, iobase, irq, rv = 0;
101	u_int8_t myea[ETHER_ADDR_LEN];
102
103	if (ia->ia_nio < 1)
104		return (0);
105	if (ia->ia_nirq < 1)
106		return (0);
107
108	if (ISA_DIRECT_CONFIG(ia))
109		return (0);
110
111	/* Disallow wildcarded values. */
112	if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
113		return (0);
114
115	/*
116	 * See if the sepcified address is valid for FMV-180 series.
117	 */
118	for (i = 0; i < NFMV_IOMAP; i++)
119		if (fmv_iomap[i] == ia->ia_io[0].ir_addr)
120			break;
121	if (i == NFMV_IOMAP) {
122#ifdef FMV_DEBUG
123		printf("fmv_match: unknown iobase 0x%x\n",
124		    ia->ia_io[0].ir_addr);
125#endif
126		return (0);
127	}
128
129	/* Map i/o space. */
130	if (bus_space_map(iot, ia->ia_io[0].ir_addr, FMV_NPORTS, 0, &ioh)) {
131#ifdef FMV_DEBUG
132		printf("fmv_match: couldn't map iospace 0x%x\n",
133		    ia->ia_io[0].ir_addr);
134#endif
135		return (0);
136	}
137
138	if (fmv_find(iot, ioh, &iobase, &irq) == 0) {
139#ifdef FMV_DEBUG
140		printf("fmv_match: fmv_find failed\n");
141#endif
142		goto out;
143	}
144
145	if (iobase != ia->ia_io[0].ir_addr) {
146#ifdef FMV_DEBUG
147		printf("fmv_match: unexpected iobase in board: 0x%x\n",
148		    iobase);
149#endif
150		goto out;
151	}
152
153	if (fmv_detect(iot, ioh, myea) == 0) { /* XXX necessary? */
154#ifdef FMV_DEBUG
155		printf("fmv_match: fmv_detect failed\n");
156#endif
157		goto out;
158	}
159
160	if (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ) {
161		if (ia->ia_irq[0].ir_irq != irq) {
162			printf("fmv_match: irq mismatch; "
163			    "kernel configured %d != board configured %d\n",
164			    ia->ia_irq[0].ir_irq, irq);
165			goto out;
166		}
167	} else
168		ia->ia_irq[0].ir_irq = irq;
169
170	ia->ia_nio = 1;
171	ia->ia_io[0].ir_size = FMV_NPORTS;
172
173	ia->ia_nirq = 1;
174
175	ia->ia_niomem = 0;
176	ia->ia_ndrq = 0;
177
178	rv = 1;
179
180 out:
181	bus_space_unmap(iot, ioh, FMV_NPORTS);
182	return (rv);
183}
184
185/*
186 * Check for specific bits in specific registers have specific values.
187 */
188static __inline__ int
189fe_simple_probe (iot, ioh, sp)
190	bus_space_tag_t iot;
191	bus_space_handle_t ioh;
192	struct fe_simple_probe_struct const *sp;
193{
194	u_int8_t val;
195	struct fe_simple_probe_struct const *p;
196
197	for (p = sp; p->mask != 0; p++) {
198		val = bus_space_read_1(iot, ioh, p->port);
199		if ((val & p->mask) != p->bits) {
200#ifdef FMV_DEBUG
201			printf("fe_simple_probe: %x & %x != %x\n",
202			    val, p->mask, p->bits);
203#endif
204			return (0);
205		}
206	}
207
208	return (1);
209}
210
211/*
212 * Hardware (vendor) specific probe routines.
213 */
214
215/*
216 * Probe Fujitsu FMV-180 series boards and get iobase and irq from
217 * board.
218 */
219static int
220fmv_find(iot, ioh, iobase, irq)
221	bus_space_tag_t iot;
222	bus_space_handle_t ioh;
223	int *iobase, *irq;
224{
225	u_int8_t config;
226	static int const fmv_irqmap[4] = { 3, 7, 10, 15 };
227	static struct fe_simple_probe_struct const probe_table[] = {
228		{ FE_DLCR2, 0x70, 0x00 },
229		{ FE_DLCR4, 0x08, 0x00 },
230	    /*	{ FE_DLCR5, 0x80, 0x00 },	Doesn't work. */
231
232		{ FE_FMV0, FE_FMV0_MAGIC_MASK, FE_FMV0_MAGIC_VALUE },
233		{ FE_FMV1, FE_FMV1_MAGIC_MASK, FE_FMV1_MAGIC_VALUE },
234		{ FE_FMV3, FE_FMV3_EXTRA_MASK, FE_FMV3_EXTRA_VALUE },
235#if 1
236	/*
237	 * Test *vendor* part of the station address for Fujitsu.
238	 * The test will gain reliability of probe process, but
239	 * it rejects FMV-180 clone boards manufactured by other vendors.
240	 * We have to turn the test off when such cards are made available.
241	 */
242		{ FE_FMV4, 0xFF, 0x00 },
243		{ FE_FMV5, 0xFF, 0x00 },
244		{ FE_FMV6, 0xFF, 0x0E },
245#else
246	/*
247	 * We can always verify the *first* 2 bits (in Ehternet
248	 * bit order) are "no multicast" and "no local" even for
249	 * unknown vendors.
250	 */
251		{ FE_FMV4, 0x03, 0x00 },
252#endif
253		{ 0 }
254	};
255
256	/* Simple probe. */
257	if (!fe_simple_probe(iot, ioh, probe_table))
258		return (0);
259
260	/* Check if our I/O address matches config info on EEPROM. */
261	config = bus_space_read_1(iot, ioh, FE_FMV2);
262	*iobase = fmv_iomap[(config & FE_FMV2_ADDR) >> FE_FMV2_ADDR_SHIFT];
263
264	/*
265	 * Determine which IRQ to be used.
266	 *
267	 * In this version, we always get an IRQ assignment from the
268	 * FMV-180's configuration EEPROM, ignoring that specified in
269	 * config file.
270	 */
271	*irq = fmv_irqmap[(config & FE_FMV2_IRQ) >> FE_FMV2_IRQ_SHIFT];
272
273	return (1);
274}
275
276void
277fmv_isa_attach(parent, self, aux)
278	struct device *parent, *self;
279	void *aux;
280{
281	struct fmv_isa_softc *isc = (struct fmv_isa_softc *)self;
282	struct mb86960_softc *sc = &isc->sc_mb86960;
283	struct isa_attach_args *ia = aux;
284	bus_space_tag_t iot = ia->ia_iot;
285	bus_space_handle_t ioh;
286
287	/* Map i/o space. */
288	if (bus_space_map(iot, ia->ia_io[0].ir_addr, FMV_NPORTS, 0, &ioh)) {
289		printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname);
290		return;
291	}
292
293	sc->sc_bst = iot;
294	sc->sc_bsh = ioh;
295
296	fmv_attach(sc);
297
298	/* Establish the interrupt handler. */
299	isc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
300	    IST_EDGE, IPL_NET, mb86960_intr, sc);
301	if (isc->sc_ih == NULL)
302		printf("%s: couldn't establish interrupt handler\n",
303		    sc->sc_dev.dv_xname);
304}
305