j720ssp.c revision 1.33 1 1.33 thorpej /* $NetBSD: j720ssp.c,v 1.33 2021/04/24 23:36:37 thorpej Exp $ */
2 1.1 toshii
3 1.1 toshii /*-
4 1.29 peter * Copyright (c) 2001, 2006 The NetBSD Foundation, Inc.
5 1.1 toshii * All rights reserved.
6 1.1 toshii *
7 1.1 toshii * This code is derived from software contributed to The NetBSD Foundation
8 1.29 peter * by IWAMOTO Toshihiro.
9 1.1 toshii *
10 1.1 toshii * Redistribution and use in source and binary forms, with or without
11 1.1 toshii * modification, are permitted provided that the following conditions
12 1.1 toshii * are met:
13 1.1 toshii * 1. Redistributions of source code must retain the above copyright
14 1.1 toshii * notice, this list of conditions and the following disclaimer.
15 1.1 toshii * 2. Redistributions in binary form must reproduce the above copyright
16 1.1 toshii * notice, this list of conditions and the following disclaimer in the
17 1.1 toshii * documentation and/or other materials provided with the distribution.
18 1.1 toshii *
19 1.1 toshii * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 1.1 toshii * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 1.1 toshii * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 1.1 toshii * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 1.1 toshii * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 1.1 toshii * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 1.1 toshii * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 1.1 toshii * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 1.1 toshii * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 1.1 toshii * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 1.1 toshii * POSSIBILITY OF SUCH DAMAGE.
30 1.1 toshii */
31 1.1 toshii
32 1.29 peter /* Jornada 720 SSP port. */
33 1.18 lukem
34 1.18 lukem #include <sys/cdefs.h>
35 1.33 thorpej __KERNEL_RCSID(0, "$NetBSD: j720ssp.c,v 1.33 2021/04/24 23:36:37 thorpej Exp $");
36 1.10 manu
37 1.1 toshii #include <sys/param.h>
38 1.1 toshii #include <sys/systm.h>
39 1.1 toshii #include <sys/device.h>
40 1.7 ichiro
41 1.7 ichiro #include <arm/sa11x0/sa11x0_var.h>
42 1.7 ichiro #include <arm/sa11x0/sa11x0_gpioreg.h>
43 1.7 ichiro #include <arm/sa11x0/sa11x0_ppcreg.h>
44 1.7 ichiro #include <arm/sa11x0/sa11x0_sspreg.h>
45 1.1 toshii
46 1.29 peter #include <hpcarm/dev/j720sspvar.h>
47 1.10 manu
48 1.29 peter #ifdef DEBUG
49 1.32 rjs #define DPRINTF(arg) aprint_normal arg
50 1.1 toshii #else
51 1.29 peter #define DPRINTF(arg) /* nothing */
52 1.1 toshii #endif
53 1.1 toshii
54 1.30 peter #define BIT_INVERT(x) \
55 1.30 peter do { \
56 1.30 peter (x) = ((((x) & 0xf0) >> 4) | (((x) & 0x0f) << 4)); \
57 1.30 peter (x) = ((((x) & 0xcc) >> 2) | (((x) & 0x33) << 2)); \
58 1.30 peter (x) = ((((x) & 0xaa) >> 1) | (((x) & 0x55) << 1)); \
59 1.30 peter } while (0)
60 1.30 peter
61 1.32 rjs static int j720ssp_match(device_t, cfdata_t, void *);
62 1.32 rjs static void j720ssp_attach(device_t, device_t, void *);
63 1.32 rjs static int j720ssp_search(device_t, cfdata_t, const int *, void *);
64 1.29 peter static int j720ssp_print(void *, const char *);
65 1.6 toshii
66 1.32 rjs CFATTACH_DECL_NEW(j720ssp, sizeof(struct j720ssp_softc),
67 1.29 peter j720ssp_match, j720ssp_attach, NULL, NULL);
68 1.1 toshii
69 1.1 toshii
70 1.29 peter static int
71 1.32 rjs j720ssp_match(device_t parent, cfdata_t cf, void *aux)
72 1.29 peter {
73 1.1 toshii
74 1.29 peter if (strcmp(cf->cf_name, "j720ssp") != 0)
75 1.29 peter return 0;
76 1.1 toshii
77 1.29 peter return 1;
78 1.1 toshii }
79 1.1 toshii
80 1.29 peter static void
81 1.32 rjs j720ssp_attach(device_t parent, device_t self, void *aux)
82 1.1 toshii {
83 1.32 rjs struct j720ssp_softc *sc = device_private(self);
84 1.32 rjs struct sa11x0_softc *psc = device_private(parent);
85 1.1 toshii struct sa11x0_attach_args *sa = aux;
86 1.1 toshii
87 1.32 rjs sc->sc_dev = self;
88 1.1 toshii sc->sc_iot = psc->sc_iot;
89 1.1 toshii sc->sc_gpioh = psc->sc_gpioh;
90 1.29 peter sc->sc_parent = psc;
91 1.29 peter
92 1.1 toshii if (bus_space_map(sc->sc_iot, sa->sa_addr, sa->sa_size, 0,
93 1.29 peter &sc->sc_ssph)) {
94 1.32 rjs aprint_normal(": unable to map SSP registers\n");
95 1.1 toshii return;
96 1.1 toshii }
97 1.1 toshii
98 1.32 rjs aprint_normal("\n");
99 1.3 toshii
100 1.33 thorpej config_search(self, NULL,
101 1.33 thorpej CFARG_SEARCH, j720ssp_search,
102 1.33 thorpej CFARG_EOL);
103 1.1 toshii }
104 1.1 toshii
105 1.29 peter static int
106 1.32 rjs j720ssp_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
107 1.6 toshii {
108 1.6 toshii
109 1.33 thorpej if (config_probe(parent, cf, NULL))
110 1.33 thorpej config_attach(parent, cf, NULL, j720ssp_print, CFARG_EOL);
111 1.6 toshii
112 1.9 manu return 0;
113 1.6 toshii }
114 1.6 toshii
115 1.6 toshii static int
116 1.29 peter j720ssp_print(void *aux, const char *pnp)
117 1.10 manu {
118 1.6 toshii
119 1.29 peter return pnp ? QUIET : UNCONF;
120 1.1 toshii }
121 1.1 toshii
122 1.1 toshii int
123 1.29 peter j720ssp_readwrite(struct j720ssp_softc *sc, int drainfifo, int in,
124 1.29 peter int *out, int wait)
125 1.1 toshii {
126 1.29 peter int timeout;
127 1.1 toshii
128 1.29 peter while (!(bus_space_read_4(sc->sc_iot, sc->sc_ssph, SASSP_SR) & SR_TNF))
129 1.29 peter continue;
130 1.1 toshii
131 1.29 peter timeout = 400000;
132 1.29 peter while (bus_space_read_4(sc->sc_iot, sc->sc_gpioh, SAGPIO_PLR) & 0x400)
133 1.29 peter if (--timeout == 0) {
134 1.29 peter DPRINTF(("j720ssp_readwrite: timeout 0\n"));
135 1.1 toshii return -1;
136 1.1 toshii }
137 1.1 toshii if (drainfifo) {
138 1.29 peter while (bus_space_read_4(sc->sc_iot, sc->sc_ssph, SASSP_SR) &
139 1.1 toshii SR_RNE)
140 1.1 toshii bus_space_read_4(sc->sc_iot, sc->sc_ssph, SASSP_DR);
141 1.9 manu delay(wait);
142 1.1 toshii }
143 1.1 toshii
144 1.30 peter BIT_INVERT(in);
145 1.30 peter bus_space_write_4(sc->sc_iot, sc->sc_ssph, SASSP_DR, in << 8);
146 1.1 toshii
147 1.9 manu delay(wait);
148 1.29 peter timeout = 100000;
149 1.29 peter while (!(bus_space_read_4(sc->sc_iot, sc->sc_ssph, SASSP_SR) & SR_RNE))
150 1.29 peter if (--timeout == 0) {
151 1.29 peter DPRINTF(("j720ssp_readwrite: timeout 1\n"));
152 1.1 toshii return -1;
153 1.1 toshii }
154 1.1 toshii
155 1.1 toshii *out = bus_space_read_4(sc->sc_iot, sc->sc_ssph, SASSP_DR);
156 1.30 peter BIT_INVERT(*out);
157 1.1 toshii
158 1.1 toshii return 0;
159 1.1 toshii }
160