sa1111.c revision 1.15 
1/*      $NetBSD: sa1111.c,v 1.15 2006/01/03 23:14:23 peter Exp $	*/
2
3/*-
4 * Copyright (c) 2001 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by IWAMOTO Toshihiro.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *        This product includes software developed by the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39/*
40 * TODO:
41 *   - introduce bus abstraction to support SA1101
42 */
43
44#include <sys/cdefs.h>
45__KERNEL_RCSID(0, "$NetBSD: sa1111.c,v 1.15 2006/01/03 23:14:23 peter Exp $");
46
47#include <sys/param.h>
48#include <sys/systm.h>
49#include <sys/types.h>
50#include <sys/conf.h>
51#include <sys/device.h>
52#include <sys/kernel.h>
53#include <sys/malloc.h>
54#include <sys/uio.h>
55
56#include <machine/bus.h>
57
58#include <arm/sa11x0/sa11x0_reg.h>
59#include <arm/sa11x0/sa11x0_var.h>
60#include <arm/sa11x0/sa11x0_gpioreg.h>
61#include <arm/sa11x0/sa1111_reg.h>
62#include <arm/sa11x0/sa1111_var.h>
63
64#include "locators.h"
65
66static	int	sa1111_print(void *, const char *);
67
68static void	sacc_intr_calculatemasks(struct sacc_softc *);
69static void	sacc_intr_setpolarity(sacc_chipset_tag_t *, int , int);
70int		sacc_intr(void *);
71
72#if !defined(__HAVE_GENERIC_SOFT_INTERRUPTS)
73void *softintr_establish(int, int (*)(void *), void *);
74void softintr_schedule(void *);
75#endif
76
77#ifdef INTR_DEBUG
78#define DPRINTF(arg)	printf arg
79#else
80#define DPRINTF(arg)
81#endif
82
83int
84sacc_probe(parent, match, aux)
85	struct device *parent;
86	struct cfdata *match;
87	void *aux;
88{
89	struct sa11x0_attach_args *sa = aux;
90	bus_space_handle_t ioh;
91	u_int32_t skid;
92
93	if (bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, &ioh))
94		return (0);
95
96	skid = bus_space_read_4(sa->sa_iot, ioh, SACCSBI_SKID);
97	bus_space_unmap(sa->sa_iot, ioh, sa->sa_size);
98
99	if ((skid & 0xffffff00) != 0x690cc200)
100		return (0);
101
102	return (1);
103}
104
105
106int
107sa1111_search(parent, cf, ldesc, aux)
108	struct device *parent;
109	struct cfdata *cf;
110	const int *ldesc;
111	void *aux;
112{
113	struct sa1111_attach_args aa;
114
115	aa.sa_addr = cf->cf_loc[SACCCF_ADDR];
116	aa.sa_size = cf->cf_loc[SACCCF_SIZE];
117	aa.sa_intr = cf->cf_loc[SACCCF_INTR];
118#if 0
119	aa.sa_membase = cf->cf_loc[SACCCF_MEMBASE];
120	aa.sa_memsize = cf->cf_loc[SACCCF_MEMSIZE];
121#endif
122
123        if (config_match(parent, cf, &aa) > 0)
124                config_attach(parent, cf, &aa, sa1111_print);
125
126        return 0;
127}
128
129static int
130sa1111_print(aux, name)
131	void *aux;
132	const char *name;
133{
134	return (UNCONF);
135}
136
137
138void *
139sacc_intr_establish(ic, irq, type, level, ih_fun, ih_arg)
140	sacc_chipset_tag_t *ic;
141	int irq, type, level;
142	int (*ih_fun)(void *);
143	void *ih_arg;
144{
145	int s;
146	struct sacc_softc *sc = (struct sacc_softc *)ic;
147	struct sacc_intrhand **p, *ih;
148
149	/* no point in sleeping unless someone can free memory. */
150	ih = malloc(sizeof *ih, M_DEVBUF, cold ? M_NOWAIT : M_WAITOK);
151	if (ih == NULL)
152		panic("sacc_intr_establish: can't malloc handler info");
153
154	if (irq < 0 || irq > SACCIC_LEN ||
155	    ! (type == IST_EDGE_RAISE || type == IST_EDGE_FALL))
156		panic("sacc_intr_establish: bogus irq or type");
157
158	if (sc->sc_intrhand[irq] == NULL) {
159		sacc_intr_setpolarity(ic, irq, type);
160		sc->sc_intrtype[irq] = type;
161	} else if (sc->sc_intrtype[irq] != type)
162		/* XXX we should be able to share raising and
163		 * falling edge intrs */
164		panic("sacc_intr_establish: type must be unique");
165
166	/* install intr handler */
167#if defined(__GENERIC_SOFT_INTERRUPTS_ALL_LEVELS) || \
168	!defined(__HAVE_GENERIC_SOFT_INTERRUPTS)
169
170	ih->ih_soft = softintr_establish(level, (void (*)(void *)) ih_fun,
171					 ih_arg);
172#else
173	/* map interrupt level to appropriate softinterrupt level */
174	if (level >= IPL_SOFTSERIAL)
175		level = IPL_SOFTSERIAL;
176	else if(level >= IPL_SOFTNET)
177		level = IPL_SOFTNET;
178	ih->ih_soft = softintr_establish(level, (void (*)(void *)) ih_fun,
179					 ih_arg);
180#endif
181	ih->ih_irq = irq;
182	ih->ih_next = NULL;
183
184	s = splhigh();
185	for(p = &sc->sc_intrhand[irq]; *p; p = &(*p)->ih_next)
186		;
187
188	*p = ih;
189
190	sacc_intr_calculatemasks(sc);
191	splx(s);
192
193	return(ih);
194}
195
196void
197sacc_intr_disestablish(ic, arg)
198	sacc_chipset_tag_t *ic;
199	void *arg;
200{
201	int irq, s;
202	struct sacc_softc *sc = (struct sacc_softc *)ic;
203	struct sacc_intrhand *ih, **p;
204
205	ih = (struct sacc_intrhand *)arg;
206	irq = ih->ih_irq;
207
208#ifdef DIAGNOSTIC
209	if (irq < 0 || irq > SACCIC_LEN)
210		panic("sacc_intr_disestablish: bogus irq");
211#endif
212
213	s = splhigh();
214
215	for(p = &sc->sc_intrhand[irq];; p = &(*p)->ih_next) {
216		if (*p == NULL)
217			panic("sacc_intr_disestablish: handler not registered");
218		if (*p == ih)
219			break;
220	}
221	*p = (*p)->ih_next;
222
223	sacc_intr_calculatemasks(sc);
224	splx(s);
225
226	free(ih, M_DEVBUF);
227}
228
229void
230sacc_intr_setpolarity(ic, irq, type)
231	sacc_chipset_tag_t *ic;
232	int irq;
233	int type;
234{
235	struct sacc_softc *sc = (struct sacc_softc *)ic;
236	int s;
237	u_int32_t pol, mask;
238	int addr;
239
240	if (irq >= 32) {
241		addr = SACCIC_INTPOL1;
242		irq -= 32;
243	} else
244		addr = SACCIC_INTPOL0;
245
246	mask = (1 << irq);
247
248	s = splhigh();
249	pol = bus_space_read_4(sc->sc_iot, sc->sc_ioh, addr);
250	if (type == IST_EDGE_RAISE)
251		pol &= ~mask;
252	else
253		pol |= mask;
254	bus_space_write_4(sc->sc_iot, sc->sc_ioh, addr, pol);
255	splx(s);
256}
257
258void
259sacc_intr_calculatemasks(sc)
260	struct sacc_softc *sc;
261{
262	int irq;
263
264	sc->sc_imask.lo = 0;
265	sc->sc_imask.hi = 0;
266	for(irq = 0; irq < 32; irq++)
267		if (sc->sc_intrhand[irq])
268			sc->sc_imask.lo |= (1 << irq);
269	for(irq = 0; irq < SACCIC_LEN - 32; irq++)
270		if (sc->sc_intrhand[irq + 32])
271			sc->sc_imask.hi |= (1 << irq);
272
273
274	/* XXX this should not be done here */
275	bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTEN0,
276			  sc->sc_imask.lo);
277	bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTEN1,
278			  sc->sc_imask.hi);
279	DPRINTF(("sacc_intr_calculatemasks: %x %x\n", sc->sc_imask.lo,
280	    sc->sc_imask.hi));
281}
282