Line data Source code
1 : /* $OpenBSD: sdhc_acpi.c,v 1.13 2018/07/01 11:37:11 kettenis Exp $ */
2 : /*
3 : * Copyright (c) 2016 Mark Kettenis
4 : *
5 : * Permission to use, copy, modify, and distribute this software for any
6 : * purpose with or without fee is hereby granted, provided that the above
7 : * copyright notice and this permission notice appear in all copies.
8 : *
9 : * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 : * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 : * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 : * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 : * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 : * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 : * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 : */
17 :
18 : #include <sys/param.h>
19 : #include <sys/malloc.h>
20 : #include <sys/systm.h>
21 :
22 : #include <dev/acpi/acpireg.h>
23 : #include <dev/acpi/acpivar.h>
24 : #include <dev/acpi/acpidev.h>
25 : #include <dev/acpi/amltypes.h>
26 : #include <dev/acpi/dsdt.h>
27 : #undef DEVNAME
28 : #include <dev/sdmmc/sdhcreg.h>
29 : #include <dev/sdmmc/sdhcvar.h>
30 : #include <dev/sdmmc/sdmmcvar.h>
31 :
32 : struct sdhc_acpi_softc {
33 : struct sdhc_softc sc;
34 : struct acpi_softc *sc_acpi;
35 : struct aml_node *sc_node;
36 :
37 : bus_space_tag_t sc_memt;
38 : bus_space_handle_t sc_memh;
39 : bus_addr_t sc_addr;
40 : bus_size_t sc_size;
41 :
42 : int sc_irq;
43 : int sc_irq_flags;
44 : void *sc_ih;
45 :
46 : struct aml_node *sc_gpio_int_node;
47 : struct aml_node *sc_gpio_io_node;
48 : uint16_t sc_gpio_int_pin;
49 : uint16_t sc_gpio_int_flags;
50 : uint16_t sc_gpio_io_pin;
51 :
52 : struct sdhc_host *sc_host;
53 : };
54 :
55 : int sdhc_acpi_match(struct device *, void *, void *);
56 : void sdhc_acpi_attach(struct device *, struct device *, void *);
57 :
58 : struct cfattach sdhc_acpi_ca = {
59 : sizeof(struct sdhc_acpi_softc), sdhc_acpi_match, sdhc_acpi_attach
60 : };
61 :
62 : const char *sdhc_hids[] = {
63 : "PNP0D40",
64 : "INT33BB",
65 : "80860F14",
66 : "PNP0FFF",
67 : NULL
68 : };
69 :
70 : int sdhc_acpi_parse_resources(int, union acpi_resource *, void *);
71 : int sdhc_acpi_card_detect_nonremovable(struct sdhc_softc *);
72 : int sdhc_acpi_card_detect_gpio(struct sdhc_softc *);
73 : int sdhc_acpi_card_detect_intr(void *);
74 : void sdhc_acpi_power_on(struct sdhc_acpi_softc *, struct aml_node *);
75 : void sdhc_acpi_explore(struct sdhc_acpi_softc *);
76 :
77 : int
78 0 : sdhc_acpi_match(struct device *parent, void *match, void *aux)
79 : {
80 0 : struct acpi_attach_args *aaa = aux;
81 0 : struct cfdata *cf = match;
82 :
83 0 : return acpi_matchhids(aaa, sdhc_hids, cf->cf_driver->cd_name);
84 : }
85 :
86 : void
87 0 : sdhc_acpi_attach(struct device *parent, struct device *self, void *aux)
88 : {
89 0 : struct acpi_attach_args *aaa = aux;
90 0 : struct sdhc_acpi_softc *sc = (struct sdhc_acpi_softc *)self;
91 0 : struct aml_value res;
92 :
93 0 : sc->sc_acpi = (struct acpi_softc *)parent;
94 0 : sc->sc_node = aaa->aaa_node;
95 0 : printf(" %s", sc->sc_node->name);
96 :
97 0 : if (aml_evalname(sc->sc_acpi, sc->sc_node, "_CRS", 0, NULL, &res)) {
98 0 : printf(", can't find registers\n");
99 0 : return;
100 : }
101 :
102 0 : aml_parse_resource(&res, sdhc_acpi_parse_resources, sc);
103 0 : printf(" addr 0x%lx/0x%lx", sc->sc_addr, sc->sc_size);
104 0 : if (sc->sc_addr == 0 || sc->sc_size == 0) {
105 0 : printf("\n");
106 0 : return;
107 : }
108 :
109 0 : printf(" irq %d", sc->sc_irq);
110 :
111 0 : sc->sc_memt = aaa->aaa_memt;
112 0 : if (bus_space_map(sc->sc_memt, sc->sc_addr, sc->sc_size, 0,
113 0 : &sc->sc_memh)) {
114 0 : printf(", can't map registers\n");
115 0 : return;
116 : }
117 :
118 0 : sc->sc_ih = acpi_intr_establish(sc->sc_irq, sc->sc_irq_flags, IPL_BIO,
119 0 : sdhc_intr, sc, sc->sc.sc_dev.dv_xname);
120 0 : if (sc->sc_ih == NULL) {
121 0 : printf(", can't establish interrupt\n");
122 0 : return;
123 : }
124 :
125 0 : if (sc->sc_gpio_io_node && sc->sc_gpio_io_node->gpio) {
126 0 : sc->sc.sc_card_detect = sdhc_acpi_card_detect_gpio;
127 0 : printf(", gpio");
128 0 : }
129 :
130 0 : printf("\n");
131 :
132 0 : if (sc->sc_gpio_int_node && sc->sc_gpio_int_node->gpio) {
133 : struct acpi_gpio *gpio = sc->sc_gpio_int_node->gpio;
134 :
135 0 : gpio->intr_establish(gpio->cookie, sc->sc_gpio_int_pin,
136 0 : sc->sc_gpio_int_flags, sdhc_acpi_card_detect_intr, sc);
137 0 : }
138 :
139 0 : sdhc_acpi_power_on(sc, sc->sc_node);
140 0 : sdhc_acpi_explore(sc);
141 :
142 0 : sc->sc.sc_host = &sc->sc_host;
143 0 : sc->sc.sc_dmat = aaa->aaa_dmat;
144 0 : sdhc_host_found(&sc->sc, sc->sc_memt, sc->sc_memh, sc->sc_size, 1, 0);
145 0 : }
146 :
147 : int
148 0 : sdhc_acpi_parse_resources(int crsidx, union acpi_resource *crs, void *arg)
149 : {
150 0 : struct sdhc_acpi_softc *sc = arg;
151 0 : int type = AML_CRSTYPE(crs);
152 : struct aml_node *node;
153 : uint16_t pin;
154 :
155 0 : switch (type) {
156 : case LR_MEM32FIXED:
157 0 : sc->sc_addr = crs->lr_m32fixed._bas;
158 0 : sc->sc_size = crs->lr_m32fixed._len;
159 0 : break;
160 : case LR_EXTIRQ:
161 0 : sc->sc_irq = crs->lr_extirq.irq[0];
162 0 : sc->sc_irq_flags = crs->lr_extirq.flags;
163 0 : break;
164 : case LR_GPIO:
165 0 : node = aml_searchname(sc->sc_node, (char *)&crs->pad[crs->lr_gpio.res_off]);
166 0 : pin = *(uint16_t *)&crs->pad[crs->lr_gpio.pin_off];
167 0 : if (crs->lr_gpio.type == LR_GPIO_INT) {
168 0 : sc->sc_gpio_int_node = node;
169 0 : sc->sc_gpio_int_pin = pin;
170 0 : sc->sc_gpio_int_flags = crs->lr_gpio.tflags;
171 0 : } else if (crs->lr_gpio.type == LR_GPIO_IO) {
172 0 : sc->sc_gpio_io_node = node;
173 0 : sc->sc_gpio_io_pin = pin;
174 0 : }
175 : break;
176 : }
177 :
178 0 : return 0;
179 : }
180 :
181 : int
182 0 : sdhc_acpi_card_detect_nonremovable(struct sdhc_softc *ssc)
183 : {
184 0 : return 1;
185 : }
186 :
187 : int
188 0 : sdhc_acpi_card_detect_gpio(struct sdhc_softc *ssc)
189 : {
190 0 : struct sdhc_acpi_softc *sc = (struct sdhc_acpi_softc *)ssc;
191 0 : struct acpi_gpio *gpio = sc->sc_gpio_io_node->gpio;
192 0 : uint16_t pin = sc->sc_gpio_io_pin;
193 :
194 : /* Card detect GPIO signal is active-low. */
195 0 : return !gpio->read_pin(gpio->cookie, pin);
196 : }
197 :
198 : int
199 0 : sdhc_acpi_card_detect_intr(void *arg)
200 : {
201 0 : struct sdhc_acpi_softc *sc = arg;
202 :
203 0 : sdhc_needs_discover(&sc->sc);
204 :
205 0 : return (1);
206 : }
207 :
208 : void
209 0 : sdhc_acpi_power_on(struct sdhc_acpi_softc *sc, struct aml_node *node)
210 : {
211 0 : node = aml_searchname(node, "_PS0");
212 0 : if (node && aml_evalnode(sc->sc_acpi, node, 0, NULL, NULL))
213 0 : printf("%s: _PS0 failed\n", sc->sc.sc_dev.dv_xname);
214 0 : }
215 :
216 : int
217 0 : sdhc_acpi_do_explore(struct aml_node *node, void *arg)
218 : {
219 0 : struct sdhc_acpi_softc *sc = arg;
220 0 : int64_t sta, rmv;
221 :
222 : /* We're only interested in our children. */
223 0 : if (node == sc->sc_node)
224 0 : return 0;
225 :
226 : /* Only consider devices that are actually present. */
227 0 : if (node->value == NULL ||
228 0 : node->value->type != AML_OBJTYPE_DEVICE)
229 0 : return 1;
230 0 : if (aml_evalinteger(sc->sc_acpi, node, "_STA", 0, NULL, &sta))
231 0 : sta = STA_PRESENT | STA_ENABLED | STA_DEV_OK | 0x1000;
232 0 : if ((sta & STA_PRESENT) == 0)
233 0 : return 1;
234 :
235 0 : acpi_attach_deps(sc->sc_acpi, node);
236 :
237 : /* Override card detect if we have non-removable devices. */
238 0 : if (aml_evalinteger(sc->sc_acpi, node, "_RMV", 0, NULL, &rmv))
239 0 : rmv = 1;
240 0 : if (rmv == 0 && sc->sc.sc_card_detect == NULL)
241 0 : sc->sc.sc_card_detect = sdhc_acpi_card_detect_nonremovable;
242 :
243 0 : sdhc_acpi_power_on(sc, node);
244 :
245 0 : return 1;
246 0 : }
247 :
248 : void
249 0 : sdhc_acpi_explore(struct sdhc_acpi_softc *sc)
250 : {
251 0 : aml_walknodes(sc->sc_node, AML_WALK_PRE, sdhc_acpi_do_explore, sc);
252 0 : }
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