1 /* $NetBSD: gxmci.c,v 1.4 2012/01/21 19:44:28 nonaka Exp $ */
2
3 /*-
4 * Copyright (C) 2007 NONAKA Kimihiro <nonaka@netbsd.org>
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, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: gxmci.c,v 1.4 2012/01/21 19:44:28 nonaka Exp $");
30
31 #include <sys/param.h>
32 #include <sys/device.h>
33 #include <sys/systm.h>
34
35 #include <sys/bus.h>
36 #include <machine/intr.h>
37
38 #include <arm/xscale/pxa2x0cpu.h>
39 #include <arm/xscale/pxa2x0reg.h>
40 #include <arm/xscale/pxa2x0var.h>
41 #include <arm/xscale/pxa2x0_gpio.h>
42 #include <arm/xscale/pxa2x0_mci.h>
43
44 #include <dev/sdmmc/sdmmcreg.h>
45
46 #if defined(PXAMCI_DEBUG)
47 #define DPRINTF(s) printf s
48 #else
49 #define DPRINTF(s)
50 #endif
51
52 struct gxmci_softc {
53 struct pxamci_softc sc;
54 };
55
56 static int pxamci_match(device_t, cfdata_t, void *);
57 static void pxamci_attach(device_t, device_t, void *);
58
59 CFATTACH_DECL_NEW(gxmci, sizeof(struct gxmci_softc),
60 pxamci_match, pxamci_attach, NULL, NULL);
61
62 static uint32_t gxmci_get_ocr(void *);
63 static int gxmci_set_power(void *, uint32_t);
64 static int gxmci_card_detect(void *);
65 static int gxmci_write_protect(void *);
66
67 static int
pxamci_match(device_t parent,cfdata_t match,void * aux)68 pxamci_match(device_t parent, cfdata_t match, void *aux)
69 {
70 struct pxaip_attach_args *pxa = aux;
71 static struct pxa2x0_gpioconf pxa25x_gxmci_gpioconf[] = {
72 { 8, GPIO_ALT_FN_1_OUT }, /* MMCCS0 */
73 { 53, GPIO_ALT_FN_1_OUT }, /* MMCLK */
74 { -1 }
75 };
76 struct pxa2x0_gpioconf *gpioconf;
77 u_int reg;
78 int i;
79
80 if (strcmp(pxa->pxa_name, match->cf_name) != 0)
81 return 0;
82
83 /*
84 * Check GPIO configuration. If you use these, it is sure already
85 * to have been set by gxio.
86 */
87 gpioconf =
88 CPU_IS_PXA250 ? pxa25x_gxmci_gpioconf : pxa27x_pxamci_gpioconf;
89 for (i = 0; gpioconf[i].pin != -1; i++) {
90 reg = pxa2x0_gpio_get_function(gpioconf[i].pin);
91 if (GPIO_FN(reg) != GPIO_FN(gpioconf[i].value) ||
92 GPIO_FN_IS_OUT(reg) != GPIO_FN_IS_OUT(gpioconf[i].value))
93 return 0;
94 }
95 pxa->pxa_size = PXA2X0_MMC_SIZE;
96
97 return 1;
98 }
99
100 static void
pxamci_attach(device_t parent,device_t self,void * aux)101 pxamci_attach(device_t parent, device_t self, void *aux)
102 {
103 struct gxmci_softc *sc = device_private(self);
104 struct pxaip_attach_args *pxa = aux;
105
106 sc->sc.sc_tag.cookie = sc;
107 sc->sc.sc_tag.get_ocr = gxmci_get_ocr;
108 sc->sc.sc_tag.set_power = gxmci_set_power;
109 sc->sc.sc_tag.card_detect = gxmci_card_detect;
110 sc->sc.sc_tag.write_protect = gxmci_write_protect;
111 sc->sc.sc_caps = 0;
112
113 if (pxamci_attach_sub(self, pxa)) {
114 aprint_error_dev(self, "unable to attach MMC controller\n");
115 }
116
117 if (!pmf_device_register(self, NULL, NULL)) {
118 aprint_error_dev(self, "couldn't establish power handler\n");
119 }
120 }
121
122 static uint32_t
gxmci_get_ocr(void * arg)123 gxmci_get_ocr(void *arg)
124 {
125
126 return MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V;
127 }
128
129 static int
gxmci_set_power(void * arg,uint32_t ocr)130 gxmci_set_power(void *arg, uint32_t ocr)
131 {
132
133 return 0;
134 }
135
136 /*
137 * Return non-zero if the card is currently inserted.
138 */
139 static int
gxmci_card_detect(void * arg)140 gxmci_card_detect(void *arg)
141 {
142
143 return 1;
144 }
145
146 /*
147 * Return non-zero if the card is currently write-protected.
148 */
149 static int
gxmci_write_protect(void * arg)150 gxmci_write_protect(void *arg)
151 {
152
153 return 0;
154 }
155