sa1111.c revision 1.16 
1/*      $NetBSD: sa1111.c,v 1.16 2006/03/04 17:22:06 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 1.16 2006/03/04 17:22:06 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(struct device *parent, struct cfdata *match, void *aux)
85{
86	struct sa11x0_attach_args *sa = aux;
87	bus_space_handle_t ioh;
88	u_int32_t skid;
89
90	if (bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0, &ioh))
91		return (0);
92
93	skid = bus_space_read_4(sa->sa_iot, ioh, SACCSBI_SKID);
94	bus_space_unmap(sa->sa_iot, ioh, sa->sa_size);
95
96	if ((skid & 0xffffff00) != 0x690cc200)
97		return (0);
98
99	return (1);
100}
101
102
103int
104sa1111_search(struct device *parent, struct cfdata *cf, const int *ldesc,
105    void *aux)
106{
107	struct sa1111_attach_args aa;
108
109	aa.sa_addr = cf->cf_loc[SACCCF_ADDR];
110	aa.sa_size = cf->cf_loc[SACCCF_SIZE];
111	aa.sa_intr = cf->cf_loc[SACCCF_INTR];
112#if 0
113	aa.sa_membase = cf->cf_loc[SACCCF_MEMBASE];
114	aa.sa_memsize = cf->cf_loc[SACCCF_MEMSIZE];
115#endif
116
117        if (config_match(parent, cf, &aa) > 0)
118                config_attach(parent, cf, &aa, sa1111_print);
119
120        return 0;
121}
122
123static int
124sa1111_print(void *aux, const char *name)
125{
126	return (UNCONF);
127}
128
129
130void *
131sacc_intr_establish(sacc_chipset_tag_t *ic, int irq, int type, int level,
132    int (*ih_fun)(void *), void *ih_arg)
133{
134	int s;
135	struct sacc_softc *sc = (struct sacc_softc *)ic;
136	struct sacc_intrhand **p, *ih;
137
138	/* no point in sleeping unless someone can free memory. */
139	ih = malloc(sizeof *ih, M_DEVBUF, cold ? M_NOWAIT : M_WAITOK);
140	if (ih == NULL)
141		panic("sacc_intr_establish: can't malloc handler info");
142
143	if (irq < 0 || irq > SACCIC_LEN ||
144	    ! (type == IST_EDGE_RAISE || type == IST_EDGE_FALL))
145		panic("sacc_intr_establish: bogus irq or type");
146
147	if (sc->sc_intrhand[irq] == NULL) {
148		sacc_intr_setpolarity(ic, irq, type);
149		sc->sc_intrtype[irq] = type;
150	} else if (sc->sc_intrtype[irq] != type)
151		/* XXX we should be able to share raising and
152		 * falling edge intrs */
153		panic("sacc_intr_establish: type must be unique");
154
155	/* install intr handler */
156#if defined(__GENERIC_SOFT_INTERRUPTS_ALL_LEVELS) || \
157	!defined(__HAVE_GENERIC_SOFT_INTERRUPTS)
158
159	ih->ih_soft = softintr_establish(level, (void (*)(void *)) ih_fun,
160					 ih_arg);
161#else
162	/* map interrupt level to appropriate softinterrupt level */
163	if (level >= IPL_SOFTSERIAL)
164		level = IPL_SOFTSERIAL;
165	else if(level >= IPL_SOFTNET)
166		level = IPL_SOFTNET;
167	ih->ih_soft = softintr_establish(level, (void (*)(void *)) ih_fun,
168					 ih_arg);
169#endif
170	ih->ih_irq = irq;
171	ih->ih_next = NULL;
172
173	s = splhigh();
174	for(p = &sc->sc_intrhand[irq]; *p; p = &(*p)->ih_next)
175		;
176
177	*p = ih;
178
179	sacc_intr_calculatemasks(sc);
180	splx(s);
181
182	return(ih);
183}
184
185void
186sacc_intr_disestablish(sacc_chipset_tag_t *ic, void *arg)
187{
188	int irq, s;
189	struct sacc_softc *sc = (struct sacc_softc *)ic;
190	struct sacc_intrhand *ih, **p;
191
192	ih = (struct sacc_intrhand *)arg;
193	irq = ih->ih_irq;
194
195#ifdef DIAGNOSTIC
196	if (irq < 0 || irq > SACCIC_LEN)
197		panic("sacc_intr_disestablish: bogus irq");
198#endif
199
200	s = splhigh();
201
202	for(p = &sc->sc_intrhand[irq];; p = &(*p)->ih_next) {
203		if (*p == NULL)
204			panic("sacc_intr_disestablish: handler not registered");
205		if (*p == ih)
206			break;
207	}
208	*p = (*p)->ih_next;
209
210	sacc_intr_calculatemasks(sc);
211	splx(s);
212
213	free(ih, M_DEVBUF);
214}
215
216void
217sacc_intr_setpolarity(sacc_chipset_tag_t *ic, int irq, int type)
218{
219	struct sacc_softc *sc = (struct sacc_softc *)ic;
220	int s;
221	u_int32_t pol, mask;
222	int addr;
223
224	if (irq >= 32) {
225		addr = SACCIC_INTPOL1;
226		irq -= 32;
227	} else
228		addr = SACCIC_INTPOL0;
229
230	mask = (1 << irq);
231
232	s = splhigh();
233	pol = bus_space_read_4(sc->sc_iot, sc->sc_ioh, addr);
234	if (type == IST_EDGE_RAISE)
235		pol &= ~mask;
236	else
237		pol |= mask;
238	bus_space_write_4(sc->sc_iot, sc->sc_ioh, addr, pol);
239	splx(s);
240}
241
242void
243sacc_intr_calculatemasks(struct sacc_softc *sc)
244{
245	int irq;
246
247	sc->sc_imask.lo = 0;
248	sc->sc_imask.hi = 0;
249	for(irq = 0; irq < 32; irq++)
250		if (sc->sc_intrhand[irq])
251			sc->sc_imask.lo |= (1 << irq);
252	for(irq = 0; irq < SACCIC_LEN - 32; irq++)
253		if (sc->sc_intrhand[irq + 32])
254			sc->sc_imask.hi |= (1 << irq);
255
256
257	/* XXX this should not be done here */
258	bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTEN0,
259			  sc->sc_imask.lo);
260	bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTEN1,
261			  sc->sc_imask.hi);
262	DPRINTF(("sacc_intr_calculatemasks: %x %x\n", sc->sc_imask.lo,
263	    sc->sc_imask.hi));
264}
265