1 /* $NetBSD: wzero3_mci.c,v 1.4 2012/01/21 19:44:29 nonaka Exp $ */ 2 3 /*- 4 * Copyright (C) 2009 NONAKA Kimihiro <nonaka (at) 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: wzero3_mci.c,v 1.4 2012/01/21 19:44:29 nonaka Exp $"); 30 31 #include <sys/param.h> 32 #include <sys/device.h> 33 #include <sys/systm.h> 34 #include <sys/pmf.h> 35 #include <sys/bus.h> 36 37 #include <machine/bootinfo.h> 38 #include <machine/platid.h> 39 #include <machine/platid_mask.h> 40 41 #include <arm/xscale/pxa2x0cpu.h> 42 #include <arm/xscale/pxa2x0reg.h> 43 #include <arm/xscale/pxa2x0var.h> 44 #include <arm/xscale/pxa2x0_gpio.h> 45 #include <arm/xscale/pxa2x0_mci.h> 46 47 #include <dev/sdmmc/sdmmcreg.h> 48 49 #include <hpcarm/dev/wzero3_reg.h> 50 51 #if defined(PXAMCI_DEBUG) 52 #define DPRINTF(s) do { printf s; } while (0) 53 #else 54 #define DPRINTF(s) do {} while (0) 55 #endif 56 57 struct wzero3mci_softc { 58 struct pxamci_softc sc; 59 60 void *sc_detect_ih; 61 int sc_detect_pin; 62 int sc_power_pin; 63 }; 64 65 static int pxamci_match(device_t, cfdata_t, void *); 66 static void pxamci_attach(device_t, device_t, void *); 67 68 CFATTACH_DECL_NEW(wzero3mci, sizeof(struct wzero3mci_softc), 69 pxamci_match, pxamci_attach, NULL, NULL); 70 71 static int wzero3mci_intr(void *arg); 72 73 static uint32_t wzero3mci_get_ocr(void *); 74 static int wzero3mci_set_power(void *, uint32_t); 75 static int wzero3mci_card_detect(void *); 76 static int wzero3mci_write_protect(void *); 77 78 struct wzero3mci_model { 79 platid_mask_t *platid; 80 int detect_pin; /* card detect pin# */ 81 int power_pin; /* card power pin # */ 82 } wzero3mci_table[] = { 83 /* WS003SH */ 84 { 85 &platid_mask_MACH_SHARP_WZERO3_WS003SH, 86 GPIO_WS003SH_SD_DETECT, 87 GPIO_WS003SH_SD_POWER, 88 }, 89 /* WS004SH */ 90 { 91 &platid_mask_MACH_SHARP_WZERO3_WS004SH, 92 GPIO_WS003SH_SD_DETECT, 93 GPIO_WS003SH_SD_POWER, 94 }, 95 /* WS007SH */ 96 { 97 &platid_mask_MACH_SHARP_WZERO3_WS007SH, 98 GPIO_WS007SH_SD_DETECT, 99 GPIO_WS007SH_SD_POWER, 100 }, 101 /* WS011SH */ 102 { 103 &platid_mask_MACH_SHARP_WZERO3_WS011SH, 104 GPIO_WS011SH_SD_DETECT, 105 GPIO_WS011SH_SD_POWER, 106 }, 107 /* WS0020H */ 108 { 109 &platid_mask_MACH_SHARP_WZERO3_WS020SH, 110 GPIO_WS020SH_SD_DETECT, 111 GPIO_WS020SH_SD_POWER, 112 }, 113 114 { 115 NULL, -1, -1 116 }, 117 }; 118 119 120 static const struct wzero3mci_model * 121 wzero3mci_lookup(void) 122 { 123 const struct wzero3mci_model *model; 124 125 for (model = wzero3mci_table; model->platid != NULL; model++) { 126 if (platid_match(&platid, model->platid)) { 127 return model; 128 } 129 } 130 return NULL; 131 } 132 133 static int 134 pxamci_match(device_t parent, cfdata_t cf, void *aux) 135 { 136 137 if (strcmp(cf->cf_name, "pxamci") != 0) 138 return 0; 139 if (wzero3mci_lookup() == NULL) 140 return 0; 141 return 1; 142 } 143 144 static void 145 pxamci_attach(device_t parent, device_t self, void *aux) 146 { 147 struct wzero3mci_softc *sc = device_private(self); 148 struct pxaip_attach_args *pxa = aux; 149 const struct wzero3mci_model *model; 150 151 sc->sc.sc_dev = self; 152 153 model = wzero3mci_lookup(); 154 if (model == NULL) { 155 aprint_error(": Unknown model."); 156 return; 157 } 158 159 sc->sc_detect_pin = model->detect_pin; 160 sc->sc_power_pin = model->power_pin; 161 162 /* Establish SD detect interrupt */ 163 if (sc->sc_detect_pin >= 0) { 164 pxa2x0_gpio_set_function(sc->sc_detect_pin, GPIO_IN); 165 sc->sc_detect_ih = pxa2x0_gpio_intr_establish(sc->sc_detect_pin, 166 IST_EDGE_BOTH, IPL_BIO, wzero3mci_intr, sc); 167 if (sc->sc_detect_ih == NULL) { 168 aprint_error_dev(self, 169 "unable to establish card detect interrupt\n"); 170 return; 171 } 172 } 173 174 sc->sc.sc_tag.cookie = sc; 175 sc->sc.sc_tag.get_ocr = wzero3mci_get_ocr; 176 sc->sc.sc_tag.set_power = wzero3mci_set_power; 177 sc->sc.sc_tag.card_detect = wzero3mci_card_detect; 178 sc->sc.sc_tag.write_protect = wzero3mci_write_protect; 179 sc->sc.sc_caps = PMC_CAPS_4BIT; 180 181 if (pxamci_attach_sub(self, pxa)) { 182 aprint_error_dev(self, "unable to attach MMC controller\n"); 183 goto free_intr; 184 } 185 186 if (!pmf_device_register(self, NULL, NULL)) { 187 aprint_error_dev(self, "couldn't establish power handler\n"); 188 } 189 190 return; 191 192 free_intr: 193 pxa2x0_gpio_intr_disestablish(sc->sc_detect_ih); 194 sc->sc_detect_ih = NULL; 195 } 196 197 static int 198 wzero3mci_intr(void *arg) 199 { 200 struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg; 201 202 pxa2x0_gpio_clear_intr(sc->sc_detect_pin); 203 204 pxamci_card_detect_event(&sc->sc); 205 206 return 1; 207 } 208 209 /*ARGSUSED*/ 210 static uint32_t 211 wzero3mci_get_ocr(void *arg) 212 { 213 214 return MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V; 215 } 216 217 static int 218 wzero3mci_set_power(void *arg, uint32_t ocr) 219 { 220 struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg; 221 int error = 0; 222 223 if (sc->sc_power_pin >= 0) { 224 if (ISSET(ocr, MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V)) { 225 /* power on */ 226 pxa2x0_gpio_set_bit(sc->sc_power_pin); 227 } else if (ocr == 0) { 228 /* power off */ 229 pxa2x0_gpio_clear_bit(sc->sc_power_pin); 230 } else { 231 aprint_error_dev(sc->sc.sc_dev, 232 "unsupported OCR (%#x)\n", ocr); 233 error = EINVAL; 234 } 235 } 236 return error; 237 } 238 239 /* 240 * Return non-zero if the card is currently inserted. 241 */ 242 static int 243 wzero3mci_card_detect(void *arg) 244 { 245 struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg; 246 247 if (sc->sc_detect_pin >= 0) { 248 if (pxa2x0_gpio_get_bit(sc->sc_detect_pin)) 249 return 0; 250 } 251 return 1; 252 } 253 254 /* 255 * Return non-zero if the card is currently write-protected. 256 */ 257 /*ARGSUSED*/ 258 static int 259 wzero3mci_write_protect(void *arg) 260 { 261 262 return 0; 263 } 264
Indexes created Sat Sep 20 22:09:52 GMT 2025