/* $NetBSD: wzero3_mci.c,v 1.4 2012/01/21 19:44:29 nonaka Exp $ */ /*- * Copyright (C) 2009 NONAKA Kimihiro * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: wzero3_mci.c,v 1.4 2012/01/21 19:44:29 nonaka Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(PXAMCI_DEBUG) #define DPRINTF(s) do { printf s; } while (0) #else #define DPRINTF(s) do {} while (0) #endif struct wzero3mci_softc { struct pxamci_softc sc; void *sc_detect_ih; int sc_detect_pin; int sc_power_pin; }; static int pxamci_match(device_t, cfdata_t, void *); static void pxamci_attach(device_t, device_t, void *); CFATTACH_DECL_NEW(wzero3mci, sizeof(struct wzero3mci_softc), pxamci_match, pxamci_attach, NULL, NULL); static int wzero3mci_intr(void *arg); static uint32_t wzero3mci_get_ocr(void *); static int wzero3mci_set_power(void *, uint32_t); static int wzero3mci_card_detect(void *); static int wzero3mci_write_protect(void *); struct wzero3mci_model { platid_mask_t *platid; int detect_pin; /* card detect pin# */ int power_pin; /* card power pin # */ } wzero3mci_table[] = { /* WS003SH */ { &platid_mask_MACH_SHARP_WZERO3_WS003SH, GPIO_WS003SH_SD_DETECT, GPIO_WS003SH_SD_POWER, }, /* WS004SH */ { &platid_mask_MACH_SHARP_WZERO3_WS004SH, GPIO_WS003SH_SD_DETECT, GPIO_WS003SH_SD_POWER, }, /* WS007SH */ { &platid_mask_MACH_SHARP_WZERO3_WS007SH, GPIO_WS007SH_SD_DETECT, GPIO_WS007SH_SD_POWER, }, /* WS011SH */ { &platid_mask_MACH_SHARP_WZERO3_WS011SH, GPIO_WS011SH_SD_DETECT, GPIO_WS011SH_SD_POWER, }, /* WS0020H */ { &platid_mask_MACH_SHARP_WZERO3_WS020SH, GPIO_WS020SH_SD_DETECT, GPIO_WS020SH_SD_POWER, }, { NULL, -1, -1 }, }; static const struct wzero3mci_model * wzero3mci_lookup(void) { const struct wzero3mci_model *model; for (model = wzero3mci_table; model->platid != NULL; model++) { if (platid_match(&platid, model->platid)) { return model; } } return NULL; } static int pxamci_match(device_t parent, cfdata_t cf, void *aux) { if (strcmp(cf->cf_name, "pxamci") != 0) return 0; if (wzero3mci_lookup() == NULL) return 0; return 1; } static void pxamci_attach(device_t parent, device_t self, void *aux) { struct wzero3mci_softc *sc = device_private(self); struct pxaip_attach_args *pxa = aux; const struct wzero3mci_model *model; sc->sc.sc_dev = self; model = wzero3mci_lookup(); if (model == NULL) { aprint_error(": Unknown model."); return; } sc->sc_detect_pin = model->detect_pin; sc->sc_power_pin = model->power_pin; /* Establish SD detect interrupt */ if (sc->sc_detect_pin >= 0) { pxa2x0_gpio_set_function(sc->sc_detect_pin, GPIO_IN); sc->sc_detect_ih = pxa2x0_gpio_intr_establish(sc->sc_detect_pin, IST_EDGE_BOTH, IPL_BIO, wzero3mci_intr, sc); if (sc->sc_detect_ih == NULL) { aprint_error_dev(self, "unable to establish card detect interrupt\n"); return; } } sc->sc.sc_tag.cookie = sc; sc->sc.sc_tag.get_ocr = wzero3mci_get_ocr; sc->sc.sc_tag.set_power = wzero3mci_set_power; sc->sc.sc_tag.card_detect = wzero3mci_card_detect; sc->sc.sc_tag.write_protect = wzero3mci_write_protect; sc->sc.sc_caps = PMC_CAPS_4BIT; if (pxamci_attach_sub(self, pxa)) { aprint_error_dev(self, "unable to attach MMC controller\n"); goto free_intr; } if (!pmf_device_register(self, NULL, NULL)) { aprint_error_dev(self, "couldn't establish power handler\n"); } return; free_intr: pxa2x0_gpio_intr_disestablish(sc->sc_detect_ih); sc->sc_detect_ih = NULL; } static int wzero3mci_intr(void *arg) { struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg; pxa2x0_gpio_clear_intr(sc->sc_detect_pin); pxamci_card_detect_event(&sc->sc); return 1; } /*ARGSUSED*/ static uint32_t wzero3mci_get_ocr(void *arg) { return MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V; } static int wzero3mci_set_power(void *arg, uint32_t ocr) { struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg; int error = 0; if (sc->sc_power_pin >= 0) { if (ISSET(ocr, MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V)) { /* power on */ pxa2x0_gpio_set_bit(sc->sc_power_pin); } else if (ocr == 0) { /* power off */ pxa2x0_gpio_clear_bit(sc->sc_power_pin); } else { aprint_error_dev(sc->sc.sc_dev, "unsupported OCR (%#x)\n", ocr); error = EINVAL; } } return error; } /* * Return non-zero if the card is currently inserted. */ static int wzero3mci_card_detect(void *arg) { struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg; if (sc->sc_detect_pin >= 0) { if (pxa2x0_gpio_get_bit(sc->sc_detect_pin)) return 0; } return 1; } /* * Return non-zero if the card is currently write-protected. */ /*ARGSUSED*/ static int wzero3mci_write_protect(void *arg) { return 0; }