gxmci.c revision 1.2 
1/*	$NetBSD: gxmci.c,v 1.2 2009/08/09 06:12:34 kiyohara 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 1.2 2009/08/09 06:12:34 kiyohara 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 match, void *aux)
70{
71	struct pxaip_attach_args *pxa = aux;
72	static struct pxa2x0_gpioconf pxa25x_gxmci_gpioconf[] = {
73		{  8, GPIO_ALT_FN_1_OUT },	/* MMCCS0 */
74		{ 53, GPIO_ALT_FN_1_OUT },	/* MMCLK */
75		{ -1 }
76	};
77	struct pxa2x0_gpioconf *gpioconf;
78	u_int reg;
79	int i;
80
81	if (strcmp(pxa->pxa_name, match->cf_name) != 0)
82		return 0;
83
84	/*
85	 * Check GPIO configuration.  If you use these, it is sure already
86	 * to have been set by gxio.
87	 */
88	gpioconf =
89	    CPU_IS_PXA250 ? pxa25x_gxmci_gpioconf : pxa27x_pxamci_gpioconf;
90	for (i = 0; gpioconf[i].pin != -1; i++) {
91		reg = pxa2x0_gpio_get_function(gpioconf[i].pin);
92		if (GPIO_FN(reg) != GPIO_FN(gpioconf[i].value) ||
93		    GPIO_FN_IS_OUT(reg) != GPIO_FN_IS_OUT(gpioconf[i].value))
94		return 0;
95	}
96	pxa->pxa_size = PXA2X0_MMC_SIZE;
97
98	return 1;
99}
100
101static void
102pxamci_attach(device_t parent, device_t self, void *aux)
103{
104	struct gxmci_softc *sc = device_private(self);
105	struct pxaip_attach_args *pxa = aux;
106
107	sc->sc.sc_tag.cookie = sc;
108	sc->sc.sc_tag.get_ocr = gxmci_get_ocr;
109	sc->sc.sc_tag.set_power = gxmci_set_power;
110	sc->sc.sc_tag.card_detect = gxmci_card_detect;
111	sc->sc.sc_tag.write_protect = gxmci_write_protect;
112	sc->sc.sc_caps = 0;
113
114	if (pxamci_attach_sub(self, pxa)) {
115		aprint_error_dev(self, "unable to attach MMC controller\n");
116	}
117
118	if (!pmf_device_register(self, NULL, NULL)) {
119		aprint_error_dev(self, "couldn't establish power handler\n");
120	}
121}
122
123static uint32_t
124gxmci_get_ocr(void *arg)
125{
126
127	return MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V;
128}
129
130static int
131gxmci_set_power(void *arg, uint32_t ocr)
132{
133
134	return 0;
135}
136
137/*
138 * Return non-zero if the card is currently inserted.
139 */
140static int
141gxmci_card_detect(void *arg)
142{
143
144	return 1;
145}
146
147/*
148 * Return non-zero if the card is currently write-protected.
149 */
150static int
151gxmci_write_protect(void *arg)
152{
153
154	return 0;
155}
156