1 /* $NetBSD: wzero3_mci.c,v 1.2 2010/05/23 11:53:18 nonaka Exp $ */ 2 3 /*- 4 * Copyright (c) 2009 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: wzero3_mci.c,v 1.2 2010/05/23 11:53:18 nonaka Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/device.h> 34 #include <sys/systm.h> 35 #include <sys/pmf.h> 36 37 #include <machine/bus.h> 38 #include <machine/bootinfo.h> 39 #include <machine/platid.h> 40 #include <machine/platid_mask.h> 41 42 #include <arm/xscale/pxa2x0cpu.h> 43 #include <arm/xscale/pxa2x0reg.h> 44 #include <arm/xscale/pxa2x0var.h> 45 #include <arm/xscale/pxa2x0_gpio.h> 46 #include <arm/xscale/pxa2x0_mci.h> 47 48 #include <dev/sdmmc/sdmmcreg.h> 49 50 #include <hpcarm/dev/wzero3_reg.h> 51 52 #if defined(PXAMCI_DEBUG) 53 #define DPRINTF(s) do { printf s; } while (0) 54 #else 55 #define DPRINTF(s) do {} while (0) 56 #endif 57 58 struct wzero3mci_softc { 59 struct pxamci_softc sc; 60 61 void *sc_detect_ih; 62 int sc_detect_pin; 63 int sc_power_pin; 64 }; 65 66 static int pxamci_match(device_t, cfdata_t, void *); 67 static void pxamci_attach(device_t, device_t, void *); 68 69 CFATTACH_DECL_NEW(wzero3mci, sizeof(struct wzero3mci_softc), 70 pxamci_match, pxamci_attach, NULL, NULL); 71 72 static int wzero3mci_intr(void *arg); 73 74 static uint32_t wzero3mci_get_ocr(void *); 75 static int wzero3mci_set_power(void *, uint32_t); 76 static int wzero3mci_card_detect(void *); 77 static int wzero3mci_write_protect(void *); 78 79 struct wzero3mci_model { 80 platid_mask_t *platid; 81 int detect_pin; /* card detect pin# */ 82 int power_pin; /* card power pin # */ 83 } wzero3mci_table[] = { 84 /* WS003SH */ 85 { 86 &platid_mask_MACH_SHARP_WZERO3_WS003SH, 87 GPIO_WS003SH_SD_DETECT, 88 GPIO_WS003SH_SD_POWER, 89 }, 90 /* WS004SH */ 91 { 92 &platid_mask_MACH_SHARP_WZERO3_WS004SH, 93 GPIO_WS003SH_SD_DETECT, 94 GPIO_WS003SH_SD_POWER, 95 }, 96 /* WS007SH */ 97 { 98 &platid_mask_MACH_SHARP_WZERO3_WS007SH, 99 GPIO_WS007SH_SD_DETECT, 100 GPIO_WS007SH_SD_POWER, 101 }, 102 /* WS011SH */ 103 { 104 &platid_mask_MACH_SHARP_WZERO3_WS011SH, 105 GPIO_WS011SH_SD_DETECT, 106 GPIO_WS011SH_SD_POWER, 107 }, 108 /* WS0020H */ 109 { 110 &platid_mask_MACH_SHARP_WZERO3_WS020SH, 111 GPIO_WS020SH_SD_DETECT, 112 GPIO_WS020SH_SD_POWER, 113 }, 114 115 { 116 NULL, -1, -1 117 }, 118 }; 119 120 121 static const struct wzero3mci_model * 122 wzero3mci_lookup(void) 123 { 124 const struct wzero3mci_model *model; 125 126 for (model = wzero3mci_table; model->platid != NULL; model++) { 127 if (platid_match(&platid, model->platid)) { 128 return model; 129 } 130 } 131 return NULL; 132 } 133 134 static int 135 pxamci_match(device_t parent, cfdata_t cf, void *aux) 136 { 137 138 if (strcmp(cf->cf_name, "pxamci") != 0) 139 return 0; 140 if (wzero3mci_lookup() == NULL) 141 return 0; 142 return 1; 143 } 144 145 static void 146 pxamci_attach(device_t parent, device_t self, void *aux) 147 { 148 struct wzero3mci_softc *sc = device_private(self); 149 struct pxaip_attach_args *pxa = aux; 150 const struct wzero3mci_model *model; 151 152 sc->sc.sc_dev = self; 153 154 model = wzero3mci_lookup(); 155 if (model == NULL) { 156 aprint_error(": Unknown model."); 157 return; 158 } 159 160 sc->sc_detect_pin = model->detect_pin; 161 sc->sc_power_pin = model->power_pin; 162 163 /* Establish SD detect interrupt */ 164 if (sc->sc_detect_pin >= 0) { 165 pxa2x0_gpio_set_function(sc->sc_detect_pin, GPIO_IN); 166 sc->sc_detect_ih = pxa2x0_gpio_intr_establish(sc->sc_detect_pin, 167 IST_EDGE_BOTH, IPL_BIO, wzero3mci_intr, sc); 168 if (sc->sc_detect_ih == NULL) { 169 aprint_error_dev(self, 170 "unable to establish card detect interrupt\n"); 171 return; 172 } 173 } 174 175 sc->sc.sc_tag.cookie = sc; 176 sc->sc.sc_tag.get_ocr = wzero3mci_get_ocr; 177 sc->sc.sc_tag.set_power = wzero3mci_set_power; 178 sc->sc.sc_tag.card_detect = wzero3mci_card_detect; 179 sc->sc.sc_tag.write_protect = wzero3mci_write_protect; 180 sc->sc.sc_caps = PMC_CAPS_4BIT; 181 182 if (pxamci_attach_sub(self, pxa)) { 183 aprint_error_dev(self, "unable to attach MMC controller\n"); 184 goto free_intr; 185 } 186 187 if (!pmf_device_register(self, NULL, NULL)) { 188 aprint_error_dev(self, "couldn't establish power handler\n"); 189 } 190 191 return; 192 193 free_intr: 194 pxa2x0_gpio_intr_disestablish(sc->sc_detect_ih); 195 sc->sc_detect_ih = NULL; 196 } 197 198 static int 199 wzero3mci_intr(void *arg) 200 { 201 struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg; 202 203 pxa2x0_gpio_clear_intr(sc->sc_detect_pin); 204 205 pxamci_card_detect_event(&sc->sc); 206 207 return 1; 208 } 209 210 /*ARGSUSED*/ 211 static uint32_t 212 wzero3mci_get_ocr(void *arg) 213 { 214 215 return MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V; 216 } 217 218 static int 219 wzero3mci_set_power(void *arg, uint32_t ocr) 220 { 221 struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg; 222 int error = 0; 223 224 if (sc->sc_power_pin >= 0) { 225 if (ISSET(ocr, MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V)) { 226 /* power on */ 227 pxa2x0_gpio_set_bit(sc->sc_power_pin); 228 } else if (ocr == 0) { 229 /* power off */ 230 pxa2x0_gpio_clear_bit(sc->sc_power_pin); 231 } else { 232 aprint_error_dev(sc->sc.sc_dev, 233 "unsupported OCR (%#x)\n", ocr); 234 error = EINVAL; 235 } 236 } 237 return error; 238 } 239 240 /* 241 * Return non-zero if the card is currently inserted. 242 */ 243 static int 244 wzero3mci_card_detect(void *arg) 245 { 246 struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg; 247 248 if (sc->sc_detect_pin >= 0) { 249 if (pxa2x0_gpio_get_bit(sc->sc_detect_pin)) 250 return 0; 251 } 252 return 1; 253 } 254 255 /* 256 * Return non-zero if the card is currently write-protected. 257 */ 258 /*ARGSUSED*/ 259 static int 260 wzero3mci_write_protect(void *arg) 261 { 262 263 return 0; 264 } 265