xref: /netbsd-src/sys/arch/zaurus/dev/zmci.c (revision 533071c4dd860f30eaf5ea090a8f9ea80de94634)
1 /*	$NetBSD: zmci.c,v 1.5 2012/01/29 10:12:42 tsutsui Exp $	*/
2 
3 /*-
4  * Copyright (C) 2006-2008 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: zmci.c,v 1.5 2012/01/29 10:12:42 tsutsui Exp $");
30 
31 #include <sys/param.h>
32 #include <sys/device.h>
33 #include <sys/systm.h>
34 #include <sys/bus.h>
35 #include <sys/pmf.h>
36 
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 #include <zaurus/dev/scoopreg.h>
48 #include <zaurus/dev/scoopvar.h>
49 
50 #include <zaurus/zaurus/zaurus_reg.h>
51 #include <zaurus/zaurus/zaurus_var.h>
52 
53 #if defined(PXAMCI_DEBUG)
54 #define	DPRINTF(s)	do { printf s; } while (0)
55 #else
56 #define	DPRINTF(s)	do {} while (0)
57 #endif
58 
59 struct zmci_softc {
60 	struct pxamci_softc sc;
61 
62 	void *sc_detect_ih;
63 	int sc_detect_pin;
64 	int sc_wp_pin;
65 	int sc_power_pin;
66 };
67 
68 static int pxamci_match(device_t, cfdata_t, void *);
69 static void pxamci_attach(device_t, device_t, void *);
70 
71 CFATTACH_DECL_NEW(zmci, sizeof(struct zmci_softc),
72     pxamci_match, pxamci_attach, NULL, NULL);
73 
74 static int zmci_intr(void *arg);
75 
76 static uint32_t	zmci_get_ocr(void *);
77 static int zmci_set_power(void *, uint32_t);
78 static int zmci_card_detect(void *);
79 static int zmci_write_protect(void *);
80 
81 static int
pxamci_match(device_t parent,cfdata_t cf,void * aux)82 pxamci_match(device_t parent, cfdata_t cf, void *aux)
83 {
84 
85 	return 1;
86 }
87 
88 static void
pxamci_attach(device_t parent,device_t self,void * aux)89 pxamci_attach(device_t parent, device_t self, void *aux)
90 {
91 	struct zmci_softc *sc = device_private(self);
92 	struct pxaip_attach_args *pxa = aux;
93 
94 	sc->sc.sc_dev = self;
95 
96 	if (ZAURUS_ISC1000 || ZAURUS_ISC3000) {
97 		sc->sc_detect_pin = C3000_GPIO_SD_DETECT_PIN;
98 		sc->sc_wp_pin = C3000_GPIO_SD_WP_PIN;
99 		pxa2x0_gpio_set_function(sc->sc_detect_pin, GPIO_IN);
100 		pxa2x0_gpio_set_function(sc->sc_wp_pin, GPIO_IN);
101 	} else {
102 		/* C7x0/C860 */
103 		sc->sc_detect_pin = C860_GPIO_SD_DETECT_PIN;
104 		sc->sc_wp_pin = C860_GPIO_SD_WP_PIN;
105 		sc->sc_power_pin = C860_GPIO_SD_POWER_PIN;
106 		pxa2x0_gpio_set_function(sc->sc_detect_pin, GPIO_IN);
107 		pxa2x0_gpio_set_function(sc->sc_wp_pin, GPIO_IN);
108 		pxa2x0_gpio_set_function(sc->sc_power_pin, GPIO_OUT|GPIO_SET);
109 	}
110 
111 	/* Establish SD detect interrupt */
112 	sc->sc_detect_ih = pxa2x0_gpio_intr_establish(sc->sc_detect_pin,
113 	    IST_EDGE_BOTH, IPL_BIO, zmci_intr, sc);
114 	if (sc->sc_detect_ih == NULL) {
115 		aprint_error_dev(self,
116 		    "unable to establish nSD_DETECT interrupt\n");
117 		return;
118 	}
119 
120 	sc->sc.sc_tag.cookie = sc;
121 	sc->sc.sc_tag.get_ocr = zmci_get_ocr;
122 	sc->sc.sc_tag.set_power = zmci_set_power;
123 	sc->sc.sc_tag.card_detect = zmci_card_detect;
124 	sc->sc.sc_tag.write_protect = zmci_write_protect;
125 	sc->sc.sc_caps = PMC_CAPS_4BIT;
126 
127 	if (pxamci_attach_sub(self, pxa)) {
128 		aprint_error_dev(self, "unable to attach MMC controller\n");
129 		goto free_intr;
130 	}
131 
132 	if (!pmf_device_register(self, NULL, NULL)) {
133 		aprint_error_dev(self, "couldn't establish power handler\n");
134 	}
135 
136 	return;
137 
138 free_intr:
139 	pxa2x0_gpio_intr_disestablish(sc->sc_detect_ih);
140 	sc->sc_detect_ih = NULL;
141 }
142 
143 static int
zmci_intr(void * arg)144 zmci_intr(void *arg)
145 {
146 	struct zmci_softc *sc = (struct zmci_softc *)arg;
147 
148 	pxa2x0_gpio_clear_intr(sc->sc_detect_pin);
149 
150 	pxamci_card_detect_event(&sc->sc);
151 
152 	return 1;
153 }
154 
155 static uint32_t
zmci_get_ocr(void * arg)156 zmci_get_ocr(void *arg)
157 {
158 
159 	return MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V;
160 }
161 
162 static int
zmci_set_power(void * arg,uint32_t ocr)163 zmci_set_power(void *arg, uint32_t ocr)
164 {
165 	struct zmci_softc *sc = (struct zmci_softc *)arg;
166 
167 	if (ISSET(ocr, MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V)) {
168 		if (ZAURUS_ISC3000 || ZAURUS_ISC1000)
169 			scoop_set_sdmmc_power(1);
170 		else if (ZAURUS_ISC860)
171 			pxa2x0_gpio_set_bit(sc->sc_power_pin);
172 		return 0;
173 	}
174 
175 	if (ocr != 0) {
176 		printf("%s: zmci_set_power(): unsupported OCR (%#x)\n",
177 		    device_xname(sc->sc.sc_dev), ocr);
178 		return EINVAL;
179 	}
180 
181 	/* power off */
182 	if (ZAURUS_ISC3000 || ZAURUS_ISC1000)
183 		scoop_set_sdmmc_power(0);
184 	else if(ZAURUS_ISC860)
185 		pxa2x0_gpio_clear_bit(sc->sc_power_pin);
186 	return 0;
187 }
188 
189 /*
190  * Return non-zero if the card is currently inserted.
191  */
192 static int
zmci_card_detect(void * arg)193 zmci_card_detect(void *arg)
194 {
195 	struct zmci_softc *sc = (struct zmci_softc *)arg;
196 
197 	if (!pxa2x0_gpio_get_bit(sc->sc_detect_pin))
198 		return 1;
199 	return 0;
200 }
201 
202 /*
203  * Return non-zero if the card is currently write-protected.
204  */
205 static int
zmci_write_protect(void * arg)206 zmci_write_protect(void *arg)
207 {
208 	struct zmci_softc *sc = (struct zmci_softc *)arg;
209 
210 	if (pxa2x0_gpio_get_bit(sc->sc_wp_pin))
211 		return 1;
212 	return 0;
213 }
214