summaryrefslogtreecommitdiff
path: root/sys/arch/hpcarm/dev/sacc_hpcarm.c
blob: 1720730b80de5747469b4a85ec56d379fc45caa4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
/*      $NetBSD: sacc_hpcarm.c,v 1.14 2021/08/07 16:18:53 thorpej Exp $	*/

/*-
 * Copyright (c) 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by IWAMOTO Toshihiro.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Platform dependent part for SA-11[01]1 companion chip on hpcarm.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sacc_hpcarm.c,v 1.14 2021/08/07 16:18:53 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/uio.h>
#include <sys/bus.h>

#include <machine/platid.h>
#include <machine/platid_mask.h>

#include <arm/sa11x0/sa11x0_reg.h>
#include <arm/sa11x0/sa11x0_var.h>
#include <arm/sa11x0/sa11x0_gpioreg.h>
#include <arm/sa11x0/sa1111_reg.h>
#include <arm/sa11x0/sa1111_var.h>

static void	sacc_attach(device_t, device_t, void *);
static int	sacc_intr(void *);

struct platid_data sacc_platid_table[] = {
	{ &platid_mask_MACH_HP_JORNADA_7XX, (void *)1 },
	{ NULL, NULL }
};

CFATTACH_DECL_NEW(sacc, sizeof(struct sacc_softc),
    sacc_probe, sacc_attach, NULL, NULL);

#ifdef INTR_DEBUG
#define DPRINTF(arg)	aprint_normal arg
#else
#define DPRINTF(arg)
#endif

static void
sacc_attach(device_t parent, device_t self, void *aux)
{
	int i, gpiopin;
	uint32_t skid;
	struct sacc_softc *sc = device_private(self);
	struct sa11x0_softc *psc = device_private(parent);
	struct sa11x0_attach_args *sa = aux;
	struct platid_data *p;

	aprint_normal("\n");

	sc->sc_dev = self;
	sc->sc_iot = sa->sa_iot;
	sc->sc_piot = psc->sc_iot;
	sc->sc_gpioh = psc->sc_gpioh;

	p = platid_search_data(&platid, sacc_platid_table);
	if (p == NULL)
		return;

	gpiopin = (int)p->data;
	sc->sc_gpiomask = 1 << gpiopin;

	if (bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0,
			  &sc->sc_ioh)) {
		aprint_normal_dev(self, "unable to map registers\n");
		return;
	}

	skid = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACCSBI_SKID);

	aprint_normal_dev(self, "SA-1111 rev %d.%d\n",
			  (skid & 0xf0) >> 4, skid & 0xf);

	for (i = 0; i < SACCIC_LEN; i++)
		sc->sc_intrhand[i] = NULL;

	/* initialize SA-1111 interrupt controller */
	bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTEN0, 0);
	bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTEN1, 0);
	bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTTSTSEL, 0);
	bus_space_write_4(sc->sc_iot, sc->sc_ioh,
			  SACCIC_INTSTATCLR0, 0xffffffff);
	bus_space_write_4(sc->sc_iot, sc->sc_ioh,
			  SACCIC_INTSTATCLR1, 0xffffffff);

	/* connect to SA-1110's GPIO intr */
	sa11x0_intr_establish(0, gpiopin, 1, IPL_SERIAL, sacc_intr, sc);

	/* attach each devices */
	config_search(self, NULL,
	    CFARGS(.search = sa1111_search));
}

static int
sacc_intr(void *arg)
{
	int i;
	uint32_t mask;
	struct sacc_intrvec intstat;
	struct sacc_softc *sc = arg;
	struct sacc_intrhand *ih;

	intstat.lo =
	    bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTSTATCLR0);
	intstat.hi =
	    bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTSTATCLR1);
	DPRINTF(("sacc_intr: %x %x\n", intstat.lo, intstat.hi));

	/* clear SA-1110's GPIO intr status */
	bus_space_write_4(sc->sc_piot, sc->sc_gpioh,
			  SAGPIO_EDR, sc->sc_gpiomask);

	for (i = 0, mask = 1; i < 32; i++, mask <<= 1)
		if (intstat.lo & mask) {
			/*
			 * Clear intr status before calling intr handlers.
			 * This cause stray interrupts, but clearing
			 * after calling intr handlers cause intr lossage.
			 */
			bus_space_write_4(sc->sc_iot, sc->sc_ioh,
					  SACCIC_INTSTATCLR0, 1 << i);

			for (ih = sc->sc_intrhand[i]; ih; ih = ih->ih_next)
				softint_schedule(ih->ih_soft);
		}
	for (i = 0, mask = 1; i < SACCIC_LEN - 32; i++, mask <<= 1)
		if (intstat.hi & mask) {
			bus_space_write_4(sc->sc_iot, sc->sc_ioh,
					  SACCIC_INTSTATCLR1, 1 << i);
			for (ih = sc->sc_intrhand[i + 32]; ih; ih = ih->ih_next)
				softint_schedule(ih->ih_soft);
		}
	return 1;
}