1 /* $NetBSD: g42xxeb_mci.c,v 1.3 2012/01/21 19:44:28 nonaka Exp $ */
2
3 /*-
4 * Copyright (c) 2009 Genetec Corporation. All rights reserved.
5 * Written by Hiroyuki Bessho for Genetec Corporation.
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
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials provided
15 * with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS''
18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
20 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS
21 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
24 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
27 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 /* derived from zaurus/dev/zmci.c */
32
33 /*-
34 * Copyright (C) 2006-2008 NONAKA Kimihiro <nonaka@netbsd.org>
35 * All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 *
46 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
47 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
48 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
49 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
50 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
51 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
52 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
53 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
54 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
55 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
56 */
57
58 #include <sys/cdefs.h>
59 __KERNEL_RCSID(0, "$NetBSD: g42xxeb_mci.c,v 1.3 2012/01/21 19:44:28 nonaka Exp $");
60
61 #include <sys/param.h>
62 #include <sys/device.h>
63 #include <sys/systm.h>
64 #include <sys/bus.h>
65 #include <sys/pmf.h>
66
67 #include <machine/intr.h>
68
69 #include <arm/xscale/pxa2x0cpu.h>
70 #include <arm/xscale/pxa2x0reg.h>
71 #include <arm/xscale/pxa2x0var.h>
72 #include <arm/xscale/pxa2x0_gpio.h>
73 #include <arm/xscale/pxa2x0_mci.h>
74
75 #include <dev/sdmmc/sdmmcreg.h>
76
77 #include <arm/xscale/pxa2x0var.h>
78 #include <evbarm/g42xxeb/g42xxeb_var.h>
79
80 struct g42xxeb_mci_softc {
81 struct pxamci_softc sc_mci;
82
83 bus_space_tag_t sc_obio_iot;
84 bus_space_handle_t sc_obio_ioh;
85
86 void *sc_detect_ih;
87 };
88
89 static int pxamci_match(device_t, cfdata_t, void *);
90 static void pxamci_attach(device_t, device_t, void *);
91
92 CFATTACH_DECL_NEW(pxamci_obio, sizeof(struct g42xxeb_mci_softc),
93 pxamci_match, pxamci_attach, NULL, NULL);
94
95 static int g42xxeb_mci_intr(void *arg);
96
97 static uint32_t g42xxeb_mci_get_ocr(void *);
98 static int g42xxeb_mci_set_power(void *, uint32_t);
99 static int g42xxeb_mci_card_detect(void *);
100 static int g42xxeb_mci_write_protect(void *);
101
102 static int
pxamci_match(device_t parent,cfdata_t cf,void * aux)103 pxamci_match(device_t parent, cfdata_t cf, void *aux)
104 {
105
106 if (strcmp(cf->cf_name, "pxamci") == 0)
107 return 1;
108 return 0;
109 }
110
111 struct pxa2x0_gpioconf g42xxeb_pxamci_gpioconf[] = {
112 { 6, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCLK */
113 { 8, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCS0 */
114 { 9, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCS1 */
115 { -1 }
116 };
117
118
119 static void
pxamci_attach(device_t parent,device_t self,void * aux)120 pxamci_attach(device_t parent, device_t self, void *aux)
121 {
122 struct g42xxeb_mci_softc *sc = device_private(self);
123 struct obio_attach_args *oba = aux;
124 struct obio_softc *osc = device_private(parent);
125 struct pxaip_attach_args pxa;
126 struct pxa2x0_gpioconf *gpioconf[] = {
127 g42xxeb_pxamci_gpioconf,
128 NULL
129 };
130
131 bus_space_tag_t iot = oba->oba_iot;
132
133 sc->sc_mci.sc_dev = self;
134
135 pxa2x0_gpio_config(gpioconf);
136
137 /* Establish card detect interrupt */
138 sc->sc_detect_ih = obio_intr_establish(osc, G42XXEB_INT_MMCSD,
139 IPL_BIO, IST_EDGE_BOTH, g42xxeb_mci_intr, sc);
140 if (sc->sc_detect_ih == NULL) {
141 aprint_error_dev(self,
142 "unable to establish SD detect interrupt\n");
143 return;
144 }
145
146 sc->sc_mci.sc_tag.cookie = sc;
147 sc->sc_mci.sc_tag.get_ocr = g42xxeb_mci_get_ocr;
148 sc->sc_mci.sc_tag.set_power = g42xxeb_mci_set_power;
149 sc->sc_mci.sc_tag.card_detect = g42xxeb_mci_card_detect;
150 sc->sc_mci.sc_tag.write_protect = g42xxeb_mci_write_protect;
151 sc->sc_mci.sc_caps = 0;
152
153 pxa.pxa_iot = iot; /* actually, here we want I/O tag for
154 pxaip, not for obio. */
155
156 #if 0
157 /* pxamci_attach_sub() ignores following values and uses
158 * constants. */
159 pxa.pxa_addr = PXA2X0_MMC_BASE;
160 pxa.pxa_size = PXA2X0_MMC_SIZE;
161 pxa.pxa_intr = PXA2X0_INT_MMC;
162 #endif
163
164 /* disable DMA for sdmmc for now. */
165 SET(sc->sc_mci.sc_caps, PMC_CAPS_NO_DMA);
166
167 if (pxamci_attach_sub(self, &pxa)) {
168 aprint_error_dev(self,
169 "unable to attach MMC controller\n");
170 goto free_intr;
171 }
172
173 if (!pmf_device_register(self, NULL, NULL)) {
174 aprint_error_dev(self,
175 "couldn't establish power handler\n");
176 }
177
178 sc->sc_obio_iot = iot;
179 sc->sc_obio_ioh = osc->sc_obioreg_ioh;
180
181 return;
182
183 free_intr:
184 obio_intr_disestablish(osc, G42XXEB_INT_MMCSD, sc->sc_detect_ih);
185 sc->sc_detect_ih = NULL;
186 }
187
188 static int
g42xxeb_mci_intr(void * arg)189 g42xxeb_mci_intr(void *arg)
190 {
191 struct g42xxeb_mci_softc *sc = (struct g42xxeb_mci_softc *)arg;
192
193 pxamci_card_detect_event(&sc->sc_mci);
194
195 return 1;
196 }
197
198 static uint32_t
g42xxeb_mci_get_ocr(void * arg)199 g42xxeb_mci_get_ocr(void *arg)
200 {
201
202 return MMC_OCR_3_2V_3_3V;
203 }
204
205 static int
g42xxeb_mci_set_power(void * arg,uint32_t ocr)206 g42xxeb_mci_set_power(void *arg, uint32_t ocr)
207 {
208 /* nothing to do */
209 return 0;
210 }
211
212 /*
213 * Return non-zero if the card is currently inserted.
214 */
215 static int
g42xxeb_mci_card_detect(void * arg)216 g42xxeb_mci_card_detect(void *arg)
217 {
218 struct g42xxeb_mci_softc *sc = (struct g42xxeb_mci_softc *)arg;
219 uint16_t reg;
220
221 reg = bus_space_read_2(sc->sc_obio_iot, sc->sc_obio_ioh,
222 G42XXEB_INTSTS2);
223
224 return !(reg & (1<<G42XXEB_INT_MMCSD));
225 }
226
227 /*
228 * Return non-zero if the card is currently write-protected.
229 */
230 static int
g42xxeb_mci_write_protect(void * arg)231 g42xxeb_mci_write_protect(void *arg)
232 {
233 struct g42xxeb_mci_softc *sc = (struct g42xxeb_mci_softc *)arg;
234 uint16_t reg;
235
236 reg = bus_space_read_2(sc->sc_obio_iot, sc->sc_obio_ioh,
237 G42XXEB_WP);
238
239 return reg & 1;
240 }
241