1 /* $NetBSD: dwcmmc_acpi.c,v 1.3 2024/02/09 16:53:15 skrll Exp $ */
2
3 /*-
4 * Copyright (c) 2022 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. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: dwcmmc_acpi.c,v 1.3 2024/02/09 16:53:15 skrll Exp $");
31
32 #include <sys/param.h>
33 #include <sys/bus.h>
34 #include <sys/cpu.h>
35 #include <sys/device.h>
36
37 #include <dev/ic/dwc_mmc_var.h>
38 #include <dev/ic/dwc_mmc_reg.h>
39 #include <dev/sdmmc/sdmmcchip.h>
40
41 #include <dev/acpi/acpireg.h>
42 #include <dev/acpi/acpivar.h>
43 #include <dev/acpi/acpi_intr.h>
44
45 /*
46 * FIXME: Remove separate compat_data arrays once acpi_compatible_lookup
47 * grows support for DT link devices.
48 */
49 static const struct device_compatible_entry rockchip_compat_data[] = {
50 { .compat = "rockchip,rk3288-dw-mshc" },
51 DEVICE_COMPAT_EOL
52 };
53 static const struct device_compatible_entry compat_data[] = {
54 { .compat = "snps,dw-mshc" },
55 DEVICE_COMPAT_EOL
56 };
57
58 static int dwcmmc_acpi_match(device_t, cfdata_t, void *);
59 static void dwcmmc_acpi_attach(device_t, device_t, void *);
60
61 static int dwcmmc_acpi_init_props(struct dwc_mmc_softc *, ACPI_HANDLE);
62
63 CFATTACH_DECL_NEW(dwcmmc_acpi, sizeof(struct dwc_mmc_softc),
64 dwcmmc_acpi_match, dwcmmc_acpi_attach, NULL, NULL);
65
66 static int
dwcmmc_acpi_match(device_t parent,cfdata_t cf,void * aux)67 dwcmmc_acpi_match(device_t parent, cfdata_t cf, void *aux)
68 {
69 struct acpi_attach_args *aa = aux;
70 int match;
71
72 match = acpi_compatible_match(aa, rockchip_compat_data);
73 if (!match) {
74 match = acpi_compatible_match(aa, compat_data);
75 }
76
77 return match;
78 }
79
80 static void
dwcmmc_acpi_attach(device_t parent,device_t self,void * aux)81 dwcmmc_acpi_attach(device_t parent, device_t self, void *aux)
82 {
83 struct dwc_mmc_softc * const sc = device_private(self);
84 struct acpi_attach_args *aa = aux;
85 ACPI_HANDLE handle = aa->aa_node->ad_handle;
86 struct acpi_resources res;
87 struct acpi_mem *mem;
88 struct acpi_irq *irq;
89 ACPI_STATUS rv;
90 int error;
91 void *ih;
92
93 sc->sc_dev = self;
94
95 rv = acpi_resource_parse(sc->sc_dev, handle, "_CRS",
96 &res, &acpi_resource_parse_ops_default);
97 if (ACPI_FAILURE(rv)) {
98 return;
99 }
100
101 sc->sc_flags = DWC_MMC_F_USE_HOLD_REG | DWC_MMC_F_DMA;
102
103 if (acpi_compatible_match(aa, rockchip_compat_data)) {
104 sc->sc_ciu_div = 2;
105 sc->sc_intr_cardmask = DWC_MMC_INT_SDIO_INT(8);
106 }
107
108 mem = acpi_res_mem(&res, 0);
109 if (mem == NULL) {
110 aprint_error_dev(self, "couldn't find mem resource\n");
111 goto done;
112 }
113
114 irq = acpi_res_irq(&res, 0);
115 if (irq == NULL) {
116 aprint_error_dev(self, "couldn't find irq resource\n");
117 goto done;
118 }
119
120 sc->sc_bst = aa->aa_memt;
121 error = bus_space_map(sc->sc_bst, mem->ar_base, mem->ar_length,
122 0, &sc->sc_bsh);
123 if (error != 0) {
124 aprint_error_dev(self, "couldn't map registers\n");
125 goto done;
126 }
127 sc->sc_dmat = aa->aa_dmat;
128
129 if (dwcmmc_acpi_init_props(sc, handle) != 0) {
130 goto done;
131 }
132
133 if (dwc_mmc_init(sc) != 0) {
134 goto done;
135 }
136
137 ih = acpi_intr_establish(self, (uint64_t)(uintptr_t)handle, IPL_NET,
138 false, dwc_mmc_intr, sc, device_xname(self));
139 if (ih == NULL) {
140 aprint_error_dev(self, "couldn't establish interrupt\n");
141 goto done;
142 }
143
144 done:
145 acpi_resource_cleanup(&res);
146 }
147
148 static int
dwcmmc_acpi_init_props(struct dwc_mmc_softc * sc,ACPI_HANDLE handle)149 dwcmmc_acpi_init_props(struct dwc_mmc_softc *sc, ACPI_HANDLE handle)
150 {
151 ACPI_INTEGER ival;
152 bool bval;
153
154 /* Defaults */
155 sc->sc_fifo_depth = 0;
156 sc->sc_clock_freq = UINT_MAX;
157 sc->sc_bus_width = 4;
158
159 /* Get settings from DSD properties */
160 if (ACPI_SUCCESS(acpi_dsd_integer(handle, "fifo-depth", &ival))) {
161 sc->sc_fifo_depth = ival;
162 }
163 if (ACPI_SUCCESS(acpi_dsd_integer(handle, "max-frequency", &ival))) {
164 sc->sc_clock_freq = ival;
165 }
166 if (ACPI_SUCCESS(acpi_dsd_integer(handle, "bus-width", &ival))) {
167 sc->sc_bus_width = ival;
168 }
169 bval = false;
170 acpi_dsd_bool(handle, "non-removable", &bval);
171 if (bval) {
172 sc->sc_flags |= DWC_MMC_F_NON_REMOVABLE;
173 }
174 bval = false;
175 acpi_dsd_bool(handle, "broken-cd", &bval);
176 if (bval) {
177 sc->sc_flags |= DWC_MMC_F_BROKEN_CD;
178 }
179
180 if (sc->sc_clock_freq == 0 || sc->sc_clock_freq == UINT_MAX) {
181 aprint_error_dev(sc->sc_dev, "clock frequency not specified\n");
182 return ENXIO;
183 }
184
185 return 0;
186 }
187