1 /* $NetBSD: bcm2838_emmc2_acpi.c,v 1.3 2022/02/06 15:52:20 jmcneill Exp $ */
2
3 /*
4 * Copyright (c) 2021 Jared McNeill <jmcneill@invisible.ca>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: bcm2838_emmc2_acpi.c,v 1.3 2022/02/06 15:52:20 jmcneill Exp $");
30
31 #include <sys/param.h>
32 #include <sys/device.h>
33 #include <sys/systm.h>
34 #include <sys/kmem.h>
35
36 #include <dev/acpi/acpireg.h>
37 #include <dev/acpi/acpivar.h>
38 #include <dev/acpi/acpi_intr.h>
39
40 #include <dev/sdmmc/sdhcreg.h>
41 #include <dev/sdmmc/sdhcvar.h>
42 #include <dev/sdmmc/sdmmcvar.h>
43
44 #define _COMPONENT ACPI_RESOURCE_COMPONENT
45 ACPI_MODULE_NAME ("bcmemmc2_acpi")
46
47 static int bcmemmc2_acpi_match(device_t, cfdata_t, void *);
48 static void bcmemmc2_acpi_attach(device_t, device_t, void *);
49 static void bcmemmc2_acpi_attach1(device_t);
50
51 static const char * const compatible[] = {
52 "BRCME88C",
53 NULL
54 };
55
56 struct bcmemmc2_acpi_softc {
57 struct sdhc_softc sc;
58 bus_space_tag_t sc_memt;
59 bus_space_handle_t sc_memh;
60 bus_size_t sc_memsize;
61 void *sc_ih;
62 struct sdhc_host *sc_hosts[1];
63 };
64
65 CFATTACH_DECL_NEW(bcmemmc2_acpi, sizeof(struct bcmemmc2_acpi_softc),
66 bcmemmc2_acpi_match, bcmemmc2_acpi_attach, NULL, NULL);
67
68 static int
bcmemmc2_acpi_match(device_t parent,cfdata_t match,void * opaque)69 bcmemmc2_acpi_match(device_t parent, cfdata_t match, void *opaque)
70 {
71 struct acpi_attach_args *aa = opaque;
72
73 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
74 return 0;
75
76 return acpi_match_hid(aa->aa_node->ad_devinfo, compatible);
77 }
78
79 static void
bcmemmc2_acpi_attach(device_t parent,device_t self,void * opaque)80 bcmemmc2_acpi_attach(device_t parent, device_t self, void *opaque)
81 {
82 struct bcmemmc2_acpi_softc *sc = device_private(self);
83 struct acpi_attach_args *aa = opaque;
84 struct acpi_resources res;
85 struct acpi_mem *mem;
86 struct acpi_irq *irq;
87 ACPI_STATUS rv;
88
89 sc->sc.sc_dev = self;
90 sc->sc.sc_dmat = aa->aa_dmat;
91 sc->sc.sc_host = sc->sc_hosts;
92 sc->sc_memt = aa->aa_memt;
93
94 rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS",
95 &res, &acpi_resource_parse_ops_default);
96 if (ACPI_FAILURE(rv))
97 return;
98
99 mem = acpi_res_mem(&res, 0);
100 irq = acpi_res_irq(&res, 0);
101 if (mem == NULL || irq == NULL) {
102 aprint_error_dev(self, "incomplete resources\n");
103 goto cleanup;
104 }
105 if (mem->ar_length == 0) {
106 aprint_error_dev(self, "zero length memory resource\n");
107 goto cleanup;
108 }
109 sc->sc_memsize = mem->ar_length;
110
111 if (bus_space_map(sc->sc_memt, mem->ar_base, sc->sc_memsize, 0,
112 &sc->sc_memh)) {
113 aprint_error_dev(self, "couldn't map registers\n");
114 goto cleanup;
115 }
116
117 /*
118 * The controller doesn't honour standard SDHCI voltage registers, so
119 * disable UHS modes.
120 */
121 sc->sc.sc_flags = SDHC_FLAG_32BIT_ACCESS |
122 #if notyet
123 SDHC_FLAG_USE_DMA |
124 #endif
125 SDHC_FLAG_NO_1_8_V;
126
127 sc->sc_ih = acpi_intr_establish(self,
128 (uint64_t)(uintptr_t)aa->aa_node->ad_handle,
129 IPL_BIO, true, sdhc_intr, &sc->sc, device_xname(self));
130 if (sc->sc_ih == NULL) {
131 aprint_error_dev(self,
132 "couldn't establish interrupt handler\n");
133 goto unmap;
134 }
135
136 config_defer(self, bcmemmc2_acpi_attach1);
137
138 acpi_resource_cleanup(&res);
139 return;
140
141 unmap:
142 bus_space_unmap(sc->sc_memt, sc->sc_memh, sc->sc_memsize);
143 sc->sc_memsize = 0;
144 cleanup:
145 acpi_resource_cleanup(&res);
146 }
147
148 static void
bcmemmc2_acpi_attach1(device_t self)149 bcmemmc2_acpi_attach1(device_t self)
150 {
151 struct bcmemmc2_acpi_softc *sc = device_private(self);
152
153 if (sdhc_host_found(&sc->sc, sc->sc_memt, sc->sc_memh,
154 sc->sc_memsize) != 0) {
155 aprint_error_dev(self, "couldn't initialize host\n");
156 goto fail;
157 }
158
159 return;
160
161 fail:
162 if (sc->sc_ih != NULL)
163 acpi_intr_disestablish(sc->sc_ih);
164 sc->sc_ih = NULL;
165 }
166