gxmci.c revision 1.1 
1/*	$NetBSD: gxmci.c,v 1.1 2009/04/21 03:00:30 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 REGENTS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, 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: gxmci.c,v 1.1 2009/04/21 03:00:30 nonaka Exp $");
31
32#include <sys/param.h>
33#include <sys/device.h>
34#include <sys/systm.h>
35
36#include <machine/bus.h>
37#include <machine/intr.h>
38
39#include <arm/xscale/pxa2x0cpu.h>
40#include <arm/xscale/pxa2x0reg.h>
41#include <arm/xscale/pxa2x0var.h>
42#include <arm/xscale/pxa2x0_gpio.h>
43#include <arm/xscale/pxa2x0_mci.h>
44
45#include <dev/sdmmc/sdmmcreg.h>
46
47#if defined(PXAMCI_DEBUG)
48#define	DPRINTF(s)	printf s
49#else
50#define	DPRINTF(s)
51#endif
52
53struct gxmci_softc {
54	struct pxamci_softc sc;
55};
56
57static int pxamci_match(device_t, cfdata_t, void *);
58static void pxamci_attach(device_t, device_t, void *);
59
60CFATTACH_DECL_NEW(gxmci, sizeof(struct gxmci_softc),
61    pxamci_match, pxamci_attach, NULL, NULL);
62
63static uint32_t gxmci_get_ocr(void *);
64static int gxmci_set_power(void *, uint32_t);
65static int gxmci_card_detect(void *);
66static int gxmci_write_protect(void *);
67
68static int
69pxamci_match(device_t parent, cfdata_t cf, void *aux)
70{
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	/*
81	 * Check GPIO configuration.  If you use these, it is sure already
82	 * to have been set by gxio.
83	 */
84	gpioconf =
85	    CPU_IS_PXA250 ? pxa25x_gxmci_gpioconf : pxa27x_pxamci_gpioconf;
86	for (i = 0; gpioconf[i].pin != -1; i++) {
87		reg = pxa2x0_gpio_get_function(gpioconf[i].pin);
88		if (GPIO_FN(reg) != GPIO_FN(gpioconf[i].value) ||
89		    GPIO_FN_IS_OUT(reg) != GPIO_FN_IS_OUT(gpioconf[i].value))
90		return 0;
91	}
92
93	return 1;
94}
95
96static void
97pxamci_attach(device_t parent, device_t self, void *aux)
98{
99	struct gxmci_softc *sc = device_private(self);
100	struct pxaip_attach_args *pxa = aux;
101
102	sc->sc.sc_tag.cookie = sc;
103	sc->sc.sc_tag.get_ocr = gxmci_get_ocr;
104	sc->sc.sc_tag.set_power = gxmci_set_power;
105	sc->sc.sc_tag.card_detect = gxmci_card_detect;
106	sc->sc.sc_tag.write_protect = gxmci_write_protect;
107	sc->sc.sc_caps = 0;
108
109	if (pxamci_attach_sub(self, pxa)) {
110		aprint_error_dev(self, "unable to attach MMC controller\n");
111	}
112
113	if (!pmf_device_register(self, NULL, NULL)) {
114		aprint_error_dev(self, "couldn't establish power handler\n");
115	}
116}
117
118static uint32_t
119gxmci_get_ocr(void *arg)
120{
121
122	return MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V;
123}
124
125static int
126gxmci_set_power(void *arg, uint32_t ocr)
127{
128
129	return 0;
130}
131
132/*
133 * Return non-zero if the card is currently inserted.
134 */
135static int
136gxmci_card_detect(void *arg)
137{
138
139	return 1;
140}
141
142/*
143 * Return non-zero if the card is currently write-protected.
144 */
145static int
146gxmci_write_protect(void *arg)
147{
148
149	return 0;
150}
151