1 /* $NetBSD: sacc_hpcarm.c,v 1.15 2023/12/20 14:50:02 thorpej 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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Platform dependent part for SA-11[01]1 companion chip on hpcarm.
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: sacc_hpcarm.c,v 1.15 2023/12/20 14:50:02 thorpej Exp $");
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/types.h>
42 #include <sys/conf.h>
43 #include <sys/device.h>
44 #include <sys/kernel.h>
45 #include <sys/uio.h>
46 #include <sys/bus.h>
47
48 #include <machine/platid.h>
49 #include <machine/platid_mask.h>
50
51 #include <arm/sa11x0/sa11x0_reg.h>
52 #include <arm/sa11x0/sa11x0_var.h>
53 #include <arm/sa11x0/sa11x0_gpioreg.h>
54 #include <arm/sa11x0/sa1111_reg.h>
55 #include <arm/sa11x0/sa1111_var.h>
56
57 static void sacc_attach(device_t, device_t, void *);
58 static int sacc_intr(void *);
59
60 struct platid_data sacc_platid_table[] = {
61 { &platid_mask_MACH_HP_JORNADA_7XX, (void *)1 },
62 { NULL, NULL }
63 };
64
65 CFATTACH_DECL_NEW(sacc, sizeof(struct sacc_softc),
66 sacc_probe, sacc_attach, NULL, NULL);
67
68 #ifdef INTR_DEBUG
69 #define DPRINTF(arg) aprint_normal arg
70 #else
71 #define DPRINTF(arg)
72 #endif
73
74 static void
sacc_attach(device_t parent,device_t self,void * aux)75 sacc_attach(device_t parent, device_t self, void *aux)
76 {
77 int i, gpiopin;
78 uint32_t skid;
79 struct sacc_softc *sc = device_private(self);
80 struct sa11x0_softc *psc = device_private(parent);
81 struct sa11x0_attach_args *sa = aux;
82 struct platid_data *p;
83
84 aprint_normal("\n");
85
86 sc->sc_dev = self;
87 sc->sc_iot = sa->sa_iot;
88 sc->sc_piot = psc->sc_iot;
89 sc->sc_gpioh = psc->sc_gpioh;
90
91 p = platid_search_data(&platid, sacc_platid_table);
92 if (p == NULL)
93 return;
94
95 gpiopin = (int)p->data;
96 sc->sc_gpiomask = 1 << gpiopin;
97
98 if (bus_space_map(sa->sa_iot, sa->sa_addr, sa->sa_size, 0,
99 &sc->sc_ioh)) {
100 aprint_normal_dev(self, "unable to map registers\n");
101 return;
102 }
103
104 skid = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACCSBI_SKID);
105
106 aprint_normal_dev(self, "SA-1111 rev %d.%d\n",
107 (skid & 0xf0) >> 4, skid & 0xf);
108
109 for (i = 0; i < SACCIC_LEN; i++)
110 sc->sc_intrhand[i] = NULL;
111
112 /* initialize SA-1111 interrupt controller */
113 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTEN0, 0);
114 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTEN1, 0);
115 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTTSTSEL, 0);
116 bus_space_write_4(sc->sc_iot, sc->sc_ioh,
117 SACCIC_INTSTATCLR0, 0xffffffff);
118 bus_space_write_4(sc->sc_iot, sc->sc_ioh,
119 SACCIC_INTSTATCLR1, 0xffffffff);
120
121 /* connect to SA-1110's GPIO intr */
122 sa11x0_intr_establish(0, gpiopin, 1, IPL_SERIAL, sacc_intr, sc);
123
124 /* attach each devices */
125 config_search(self, NULL,
126 CFARGS(.search = sa1111_search));
127 }
128
129 static int
sacc_intr(void * arg)130 sacc_intr(void *arg)
131 {
132 int i;
133 uint32_t mask;
134 struct sacc_intrvec intstat;
135 struct sacc_softc *sc = arg;
136 struct sacc_intrhand *ih;
137
138 intstat.lo =
139 bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTSTATCLR0);
140 intstat.hi =
141 bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACCIC_INTSTATCLR1);
142 DPRINTF(("sacc_intr: %x %x\n", intstat.lo, intstat.hi));
143
144 /* clear SA-1110's GPIO intr status */
145 bus_space_write_4(sc->sc_piot, sc->sc_gpioh,
146 SAGPIO_EDR, sc->sc_gpiomask);
147
148 for (i = 0, mask = 1; i < 32; i++, mask <<= 1)
149 if (intstat.lo & mask) {
150 /*
151 * Clear intr status before calling intr handlers.
152 * This cause stray interrupts, but clearing
153 * after calling intr handlers cause intr lossage.
154 */
155 bus_space_write_4(sc->sc_iot, sc->sc_ioh,
156 SACCIC_INTSTATCLR0, 1 << i);
157
158 for (ih = sc->sc_intrhand[i]; ih; ih = ih->ih_next)
159 softint_schedule(ih->ih_soft);
160 }
161 for (i = 0, mask = 1; i < SACCIC_LEN - 32; i++, mask <<= 1)
162 if (intstat.hi & mask) {
163 bus_space_write_4(sc->sc_iot, sc->sc_ioh,
164 SACCIC_INTSTATCLR1, 1 << i);
165 for (ih = sc->sc_intrhand[i + 32]; ih; ih = ih->ih_next)
166 softint_schedule(ih->ih_soft);
167 }
168 return 1;
169 }
170