g42xxeb_mci.c revision 1.2
1 /* $NetBSD: g42xxeb_mci.c,v 1.2 2010/06/26 07:51:45 bsh Exp $ */ 2 3 /*- 4 * Copyright (c) 2009 Genetec Corporation. All rights reserved. 5 * Written by Hiroyuki Bessho for Genetec Corporation. 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 13 * copyright notice, this list of conditions and the following 14 * disclaimer in the documentation and/or other materials provided 15 * with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 20 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS 21 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 24 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 27 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 /* derived from zaurus/dev/zmci.c */ 32 33 /*- 34 * Copyright (c) 2006-2008 NONAKA Kimihiro <nonaka (at) netbsd.org> 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 46 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' 47 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 48 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 49 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS 50 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 51 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 52 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 53 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 54 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 55 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 56 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 57 * SUCH DAMAGE. 58 */ 59 60 #include <sys/cdefs.h> 61 __KERNEL_RCSID(0, "$NetBSD: g42xxeb_mci.c,v 1.2 2010/06/26 07:51:45 bsh Exp $"); 62 63 #include <sys/param.h> 64 #include <sys/device.h> 65 #include <sys/systm.h> 66 #include <sys/bus.h> 67 #include <sys/pmf.h> 68 69 #include <machine/intr.h> 70 71 #include <arm/xscale/pxa2x0cpu.h> 72 #include <arm/xscale/pxa2x0reg.h> 73 #include <arm/xscale/pxa2x0var.h> 74 #include <arm/xscale/pxa2x0_gpio.h> 75 #include <arm/xscale/pxa2x0_mci.h> 76 77 #include <dev/sdmmc/sdmmcreg.h> 78 79 #include <arm/xscale/pxa2x0var.h> 80 #include <evbarm/g42xxeb/g42xxeb_var.h> 81 82 struct g42xxeb_mci_softc { 83 struct pxamci_softc sc_mci; 84 85 bus_space_tag_t sc_obio_iot; 86 bus_space_handle_t sc_obio_ioh; 87 88 void *sc_detect_ih; 89 }; 90 91 static int pxamci_match(device_t, cfdata_t, void *); 92 static void pxamci_attach(device_t, device_t, void *); 93 94 CFATTACH_DECL_NEW(pxamci_obio, sizeof(struct g42xxeb_mci_softc), 95 pxamci_match, pxamci_attach, NULL, NULL); 96 97 static int g42xxeb_mci_intr(void *arg); 98 99 static uint32_t g42xxeb_mci_get_ocr(void *); 100 static int g42xxeb_mci_set_power(void *, uint32_t); 101 static int g42xxeb_mci_card_detect(void *); 102 static int g42xxeb_mci_write_protect(void *); 103 104 static int 105 pxamci_match(device_t parent, cfdata_t cf, void *aux) 106 { 107 108 if (strcmp(cf->cf_name, "pxamci") == 0) 109 return 1; 110 return 0; 111 } 112 113 struct pxa2x0_gpioconf g42xxeb_pxamci_gpioconf[] = { 114 { 6, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCLK */ 115 { 8, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCS0 */ 116 { 9, GPIO_CLR | GPIO_ALT_FN_1_OUT }, /* MMCCS1 */ 117 { -1 } 118 }; 119 120 121 static void 122 pxamci_attach(device_t parent, device_t self, void *aux) 123 { 124 struct g42xxeb_mci_softc *sc = device_private(self); 125 struct obio_attach_args *oba = aux; 126 struct obio_softc *osc = device_private(parent); 127 struct pxaip_attach_args pxa; 128 struct pxa2x0_gpioconf *gpioconf[] = { 129 g42xxeb_pxamci_gpioconf, 130 NULL 131 }; 132 133 bus_space_tag_t iot = oba->oba_iot; 134 135 sc->sc_mci.sc_dev = self; 136 137 pxa2x0_gpio_config(gpioconf); 138 139 /* Establish card detect interrupt */ 140 sc->sc_detect_ih = obio_intr_establish(osc, G42XXEB_INT_MMCSD, 141 IPL_BIO, IST_EDGE_BOTH, g42xxeb_mci_intr, sc); 142 if (sc->sc_detect_ih == NULL) { 143 aprint_error_dev(self, 144 "unable to establish SD detect interrupt\n"); 145 return; 146 } 147 148 sc->sc_mci.sc_tag.cookie = sc; 149 sc->sc_mci.sc_tag.get_ocr = g42xxeb_mci_get_ocr; 150 sc->sc_mci.sc_tag.set_power = g42xxeb_mci_set_power; 151 sc->sc_mci.sc_tag.card_detect = g42xxeb_mci_card_detect; 152 sc->sc_mci.sc_tag.write_protect = g42xxeb_mci_write_protect; 153 sc->sc_mci.sc_caps = 0; 154 155 pxa.pxa_iot = iot; /* actually, here we want I/O tag for 156 pxaip, not for obio. */ 157 158 #if 0 159 /* pxamci_attach_sub() ignores following values and uses 160 * constants. */ 161 pxa.pxa_addr = PXA2X0_MMC_BASE; 162 pxa.pxa_size = PXA2X0_MMC_SIZE; 163 pxa.pxa_intr = PXA2X0_INT_MMC; 164 #endif 165 166 /* disable DMA for sdmmc for now. */ 167 SET(sc->sc_mci.sc_caps, PMC_CAPS_NO_DMA); 168 169 if (pxamci_attach_sub(self, &pxa)) { 170 aprint_error_dev(self, 171 "unable to attach MMC controller\n"); 172 goto free_intr; 173 } 174 175 if (!pmf_device_register(self, NULL, NULL)) { 176 aprint_error_dev(self, 177 "couldn't establish power handler\n"); 178 } 179 180 sc->sc_obio_iot = iot; 181 sc->sc_obio_ioh = osc->sc_obioreg_ioh; 182 183 return; 184 185 free_intr: 186 obio_intr_disestablish(osc, G42XXEB_INT_MMCSD, sc->sc_detect_ih); 187 sc->sc_detect_ih = NULL; 188 } 189 190 static int 191 g42xxeb_mci_intr(void *arg) 192 { 193 struct g42xxeb_mci_softc *sc = (struct g42xxeb_mci_softc *)arg; 194 195 pxamci_card_detect_event(&sc->sc_mci); 196 197 return 1; 198 } 199 200 static uint32_t 201 g42xxeb_mci_get_ocr(void *arg) 202 { 203 204 return MMC_OCR_3_2V_3_3V; 205 } 206 207 static int 208 g42xxeb_mci_set_power(void *arg, uint32_t ocr) 209 { 210 /* nothing to do */ 211 return 0; 212 } 213 214 /* 215 * Return non-zero if the card is currently inserted. 216 */ 217 static int 218 g42xxeb_mci_card_detect(void *arg) 219 { 220 struct g42xxeb_mci_softc *sc = (struct g42xxeb_mci_softc *)arg; 221 uint16_t reg; 222 223 reg = bus_space_read_2(sc->sc_obio_iot, sc->sc_obio_ioh, 224 G42XXEB_INTSTS2); 225 226 return !(reg & (1<<G42XXEB_INT_MMCSD)); 227 } 228 229 /* 230 * Return non-zero if the card is currently write-protected. 231 */ 232 static int 233 g42xxeb_mci_write_protect(void *arg) 234 { 235 struct g42xxeb_mci_softc *sc = (struct g42xxeb_mci_softc *)arg; 236 uint16_t reg; 237 238 reg = bus_space_read_2(sc->sc_obio_iot, sc->sc_obio_ioh, 239 G42XXEB_WP); 240 241 return reg & 1; 242 } 243
Indexes created Tue Sep 30 20:09:53 GMT 2025