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