uha_eisa.c revision 1.3 
1/*	$OpenBSD: uha_eisa.c,v 1.3 2001/02/03 07:29:29 mickey Exp $	*/
2/*	$NetBSD: uha_eisa.c,v 1.5 1996/10/21 22:31:07 thorpej Exp $	*/
3
4/*
5 * Copyright (c) 1994, 1996 Charles M. Hannum.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by Charles M. Hannum.
18 * 4. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include <sys/types.h>
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/device.h>
37#include <sys/kernel.h>
38#include <sys/proc.h>
39#include <sys/user.h>
40
41#include <machine/bus.h>
42#include <machine/intr.h>
43
44#include <scsi/scsi_all.h>
45#include <scsi/scsiconf.h>
46
47#include <dev/eisa/eisavar.h>
48#include <dev/eisa/eisadevs.h>
49
50#include <dev/ic/uhareg.h>
51#include <dev/ic/uhavar.h>
52
53#define	UHA_EISA_SLOT_OFFSET	0xc80
54#define	UHA_EISA_IOSIZE		0x020
55
56#ifndef DDB
57#define	Debugger() panic("should call debugger here (uha_eisa.c)")
58#endif
59
60int	uha_eisa_match __P((struct device *, void *, void *));
61void	uha_eisa_attach __P((struct device *, struct device *, void *));
62
63struct cfattach uha_eisa_ca = {
64	sizeof(struct uha_softc), uha_eisa_match, uha_eisa_attach
65};
66
67#define KVTOPHYS(x)	vtophys(x)
68
69int u24_find __P((bus_space_tag_t, bus_space_handle_t, struct uha_softc *));
70void u24_start_mbox __P((struct uha_softc *, struct uha_mscp *));
71int u24_poll __P((struct uha_softc *, struct scsi_xfer *, int));
72int u24_intr __P((void *));
73void u24_init __P((struct uha_softc *));
74
75/*
76 * Check the slots looking for a board we recognise
77 * If we find one, note it's address (slot) and call
78 * the actual probe routine to check it out.
79 */
80int
81uha_eisa_match(parent, match, aux)
82	struct device *parent;
83	void *match, *aux;
84{
85	struct eisa_attach_args *ea = aux;
86	bus_space_tag_t iot = ea->ea_iot;
87	bus_space_handle_t ioh;
88	int rv;
89
90	/* must match one of our known ID strings */
91	if (strncmp(ea->ea_idstring, "USC024", 6))
92		return (0);
93
94	if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
95	    UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh))
96		return (0);
97
98	rv = u24_find(iot, ioh, NULL);
99
100	bus_space_unmap(iot, ioh, UHA_EISA_IOSIZE);
101
102	return (rv);
103}
104
105/*
106 * Attach all the sub-devices we can find
107 */
108void
109uha_eisa_attach(parent, self, aux)
110	struct device *parent, *self;
111	void *aux;
112{
113	struct eisa_attach_args *ea = aux;
114	struct uha_softc *sc = (void *)self;
115	bus_space_tag_t iot = ea->ea_iot;
116	bus_space_handle_t ioh;
117	eisa_chipset_tag_t ec = ea->ea_ec;
118	eisa_intr_handle_t ih;
119	const char *model, *intrstr;
120
121	if (!strncmp(ea->ea_idstring, "USC024", 6))
122		model = EISA_PRODUCT_USC0240;
123	else
124		model = "unknown model!";
125	printf(": %s\n", model);
126
127	if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
128	    UHA_EISA_SLOT_OFFSET, UHA_EISA_IOSIZE, 0, &ioh))
129		panic("uha_attach: could not map I/O addresses");
130
131	sc->sc_iot = iot;
132	sc->sc_ioh = ioh;
133	if (!u24_find(iot, ioh, sc))
134		panic("uha_attach: u24_find failed!");
135
136	if (eisa_intr_map(ec, sc->sc_irq, &ih)) {
137		printf("%s: couldn't map interrupt (%d)\n",
138		    sc->sc_dev.dv_xname, sc->sc_irq);
139		return;
140	}
141	intrstr = eisa_intr_string(ec, ih);
142	sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO,
143	    u24_intr, sc, sc->sc_dev.dv_xname);
144	if (sc->sc_ih == NULL) {
145		printf("%s: couldn't establish interrupt",
146		    sc->sc_dev.dv_xname);
147		if (intrstr != NULL)
148			printf(" at %s", intrstr);
149		printf("\n");
150		return;
151	}
152	printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
153
154	/* Save function pointers for later use. */
155	sc->start_mbox = u24_start_mbox;
156	sc->poll = u24_poll;
157	sc->init = u24_init;
158
159	uha_attach(sc);
160}
161
162int
163u24_find(iot, ioh, sc)
164	bus_space_tag_t iot;
165	bus_space_handle_t ioh;
166	struct uha_softc *sc;
167{
168	u_int8_t config0, config1, config2;
169	int irq, drq;
170	int resetcount = 4000;	/* 4 secs? */
171
172	config0 = bus_space_read_1(iot, ioh, U24_CONFIG + 0);
173	config1 = bus_space_read_1(iot, ioh, U24_CONFIG + 1);
174	config2 = bus_space_read_1(iot, ioh, U24_CONFIG + 2);
175	if ((config0 & U24_MAGIC1) == 0 ||
176	    (config1 & U24_MAGIC2) == 0)
177		return (0);
178
179	drq = -1;
180
181	switch (config0 & U24_IRQ_MASK) {
182	case U24_IRQ10:
183		irq = 10;
184		break;
185	case U24_IRQ11:
186		irq = 11;
187		break;
188	case U24_IRQ14:
189		irq = 14;
190		break;
191	case U24_IRQ15:
192		irq = 15;
193		break;
194	default:
195		printf("u24_find: illegal irq setting %x\n",
196		    config0 & U24_IRQ_MASK);
197		return (0);
198	}
199
200	bus_space_write_1(iot, ioh, U24_LINT, UHA_ASRST);
201
202	while (--resetcount) {
203		if (bus_space_read_1(iot, ioh, U24_LINT))
204			break;
205		delay(1000);	/* 1 mSec per loop */
206	}
207	if (!resetcount) {
208		printf("u24_find: board timed out during reset\n");
209		return (0);
210	}
211
212	/* if we want to fill in softc, do so now */
213	if (sc != NULL) {
214		sc->sc_irq = irq;
215		sc->sc_drq = drq;
216		sc->sc_scsi_dev = config2 & U24_HOSTID_MASK;
217	}
218
219	return (1);
220}
221
222void
223u24_start_mbox(sc, mscp)
224	struct uha_softc *sc;
225	struct uha_mscp *mscp;
226{
227	bus_space_tag_t iot = sc->sc_iot;
228	bus_space_handle_t ioh = sc->sc_ioh;
229	int spincount = 100000;	/* 1s should be enough */
230
231	while (--spincount) {
232		if ((bus_space_read_1(iot, ioh, U24_LINT) & U24_LDIP) == 0)
233			break;
234		delay(100);
235	}
236	if (!spincount) {
237		printf("%s: uha_start_mbox, board not responding\n",
238		    sc->sc_dev.dv_xname);
239		Debugger();
240	}
241
242	bus_space_write_4(iot, ioh, U24_OGMPTR, KVTOPHYS(mscp));
243	if (mscp->flags & MSCP_ABORT)
244		bus_space_write_1(iot, ioh, U24_OGMCMD, 0x80);
245	else
246		bus_space_write_1(iot, ioh, U24_OGMCMD, 0x01);
247	bus_space_write_1(iot, ioh, U24_LINT, U24_OGMFULL);
248
249	if ((mscp->xs->flags & SCSI_POLL) == 0)
250		timeout_add(&mscp->xs->stimeout, (mscp->timeout * hz) / 1000);
251}
252
253int
254u24_poll(sc, xs, count)
255	struct uha_softc *sc;
256	struct scsi_xfer *xs;
257	int count;
258{
259	bus_space_tag_t iot = sc->sc_iot;
260	bus_space_handle_t ioh = sc->sc_ioh;
261
262	while (count) {
263		/*
264		 * If we had interrupts enabled, would we
265		 * have got an interrupt?
266		 */
267		if (bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP)
268			u24_intr(sc);
269		if (xs->flags & ITSDONE)
270			return (0);
271		delay(1000);
272		count--;
273	}
274	return (1);
275}
276
277int
278u24_intr(arg)
279	void *arg;
280{
281	struct uha_softc *sc = arg;
282	bus_space_tag_t iot = sc->sc_iot;
283	bus_space_handle_t ioh = sc->sc_ioh;
284	struct uha_mscp *mscp;
285	u_char uhastat;
286	u_long mboxval;
287
288#ifdef	UHADEBUG
289	printf("%s: uhaintr ", sc->sc_dev.dv_xname);
290#endif /*UHADEBUG */
291
292	if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0)
293		return (0);
294
295	for (;;) {
296		/*
297		 * First get all the information and then
298		 * acknowledge the interrupt
299		 */
300		uhastat = bus_space_read_1(iot, ioh, U24_SINT);
301		mboxval = bus_space_read_4(iot, ioh, U24_ICMPTR);
302		bus_space_write_1(iot, ioh, U24_SINT, U24_ICM_ACK);
303		bus_space_write_1(iot, ioh, U24_ICMCMD, 0);
304
305#ifdef	UHADEBUG
306		printf("status = 0x%x ", uhastat);
307#endif /*UHADEBUG*/
308
309		/*
310		 * Process the completed operation
311		 */
312		mscp = uha_mscp_phys_kv(sc, mboxval);
313		if (!mscp) {
314			printf("%s: BAD MSCP RETURNED!\n",
315			    sc->sc_dev.dv_xname);
316			continue;	/* whatever it was, it'll timeout */
317		}
318		timeout_del(&mscp->xs->stimeout);
319		uha_done(sc, mscp);
320
321		if ((bus_space_read_1(iot, ioh, U24_SINT) & U24_SDIP) == 0)
322			return (1);
323	}
324}
325
326void
327u24_init(sc)
328	struct uha_softc *sc;
329{
330	bus_space_tag_t iot = sc->sc_iot;
331	bus_space_handle_t ioh = sc->sc_ioh;
332
333	/* free OGM and ICM */
334	bus_space_write_1(iot, ioh, U24_OGMCMD, 0);
335	bus_space_write_1(iot, ioh, U24_ICMCMD, 0);
336	/* make sure interrupts are enabled */
337#ifdef UHADEBUG
338	printf("u24_init: lmask=%02x, smask=%02x\n",
339	    bus_space_read_1(iot, ioh, U24_LMASK),
340	    bus_space_read_1(iot, ioh, U24_SMASK));
341#endif
342	bus_space_write_1(iot, ioh, U24_LMASK, 0xd2);	/* XXX */
343	bus_space_write_1(iot, ioh, U24_SMASK, 0x92);	/* XXX */
344}
345