264 lines
6.3 KiB
C
264 lines
6.3 KiB
C
/* $NetBSD: wzero3_mci.c,v 1.4 2012/01/21 19:44:29 nonaka Exp $ */
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/*-
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* Copyright (C) 2009 NONAKA Kimihiro <nonaka@netbsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: wzero3_mci.c,v 1.4 2012/01/21 19:44:29 nonaka Exp $");
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#include <sys/param.h>
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#include <sys/device.h>
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#include <sys/systm.h>
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#include <sys/pmf.h>
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#include <sys/bus.h>
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#include <machine/bootinfo.h>
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#include <machine/platid.h>
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#include <machine/platid_mask.h>
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#include <arm/xscale/pxa2x0cpu.h>
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#include <arm/xscale/pxa2x0reg.h>
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#include <arm/xscale/pxa2x0var.h>
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#include <arm/xscale/pxa2x0_gpio.h>
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#include <arm/xscale/pxa2x0_mci.h>
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#include <dev/sdmmc/sdmmcreg.h>
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#include <hpcarm/dev/wzero3_reg.h>
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#if defined(PXAMCI_DEBUG)
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#define DPRINTF(s) do { printf s; } while (0)
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#else
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#define DPRINTF(s) do {} while (0)
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#endif
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struct wzero3mci_softc {
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struct pxamci_softc sc;
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void *sc_detect_ih;
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int sc_detect_pin;
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int sc_power_pin;
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};
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static int pxamci_match(device_t, cfdata_t, void *);
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static void pxamci_attach(device_t, device_t, void *);
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CFATTACH_DECL_NEW(wzero3mci, sizeof(struct wzero3mci_softc),
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pxamci_match, pxamci_attach, NULL, NULL);
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static int wzero3mci_intr(void *arg);
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static uint32_t wzero3mci_get_ocr(void *);
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static int wzero3mci_set_power(void *, uint32_t);
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static int wzero3mci_card_detect(void *);
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static int wzero3mci_write_protect(void *);
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struct wzero3mci_model {
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platid_mask_t *platid;
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int detect_pin; /* card detect pin# */
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int power_pin; /* card power pin # */
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} wzero3mci_table[] = {
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/* WS003SH */
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{
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&platid_mask_MACH_SHARP_WZERO3_WS003SH,
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GPIO_WS003SH_SD_DETECT,
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GPIO_WS003SH_SD_POWER,
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},
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/* WS004SH */
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{
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&platid_mask_MACH_SHARP_WZERO3_WS004SH,
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GPIO_WS003SH_SD_DETECT,
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GPIO_WS003SH_SD_POWER,
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},
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/* WS007SH */
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{
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&platid_mask_MACH_SHARP_WZERO3_WS007SH,
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GPIO_WS007SH_SD_DETECT,
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GPIO_WS007SH_SD_POWER,
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},
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/* WS011SH */
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{
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&platid_mask_MACH_SHARP_WZERO3_WS011SH,
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GPIO_WS011SH_SD_DETECT,
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GPIO_WS011SH_SD_POWER,
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},
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/* WS0020H */
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{
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&platid_mask_MACH_SHARP_WZERO3_WS020SH,
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GPIO_WS020SH_SD_DETECT,
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GPIO_WS020SH_SD_POWER,
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},
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{
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NULL, -1, -1
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},
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};
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static const struct wzero3mci_model *
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wzero3mci_lookup(void)
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{
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const struct wzero3mci_model *model;
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for (model = wzero3mci_table; model->platid != NULL; model++) {
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if (platid_match(&platid, model->platid)) {
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return model;
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}
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}
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return NULL;
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}
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static int
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pxamci_match(device_t parent, cfdata_t cf, void *aux)
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{
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if (strcmp(cf->cf_name, "pxamci") != 0)
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return 0;
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if (wzero3mci_lookup() == NULL)
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return 0;
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return 1;
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}
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static void
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pxamci_attach(device_t parent, device_t self, void *aux)
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{
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struct wzero3mci_softc *sc = device_private(self);
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struct pxaip_attach_args *pxa = aux;
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const struct wzero3mci_model *model;
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sc->sc.sc_dev = self;
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model = wzero3mci_lookup();
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if (model == NULL) {
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aprint_error(": Unknown model.");
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return;
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}
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sc->sc_detect_pin = model->detect_pin;
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sc->sc_power_pin = model->power_pin;
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/* Establish SD detect interrupt */
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if (sc->sc_detect_pin >= 0) {
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pxa2x0_gpio_set_function(sc->sc_detect_pin, GPIO_IN);
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sc->sc_detect_ih = pxa2x0_gpio_intr_establish(sc->sc_detect_pin,
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IST_EDGE_BOTH, IPL_BIO, wzero3mci_intr, sc);
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if (sc->sc_detect_ih == NULL) {
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aprint_error_dev(self,
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"unable to establish card detect interrupt\n");
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return;
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}
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}
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sc->sc.sc_tag.cookie = sc;
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sc->sc.sc_tag.get_ocr = wzero3mci_get_ocr;
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sc->sc.sc_tag.set_power = wzero3mci_set_power;
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sc->sc.sc_tag.card_detect = wzero3mci_card_detect;
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sc->sc.sc_tag.write_protect = wzero3mci_write_protect;
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sc->sc.sc_caps = PMC_CAPS_4BIT;
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if (pxamci_attach_sub(self, pxa)) {
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aprint_error_dev(self, "unable to attach MMC controller\n");
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goto free_intr;
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}
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if (!pmf_device_register(self, NULL, NULL)) {
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aprint_error_dev(self, "couldn't establish power handler\n");
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}
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return;
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free_intr:
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pxa2x0_gpio_intr_disestablish(sc->sc_detect_ih);
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sc->sc_detect_ih = NULL;
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}
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static int
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wzero3mci_intr(void *arg)
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{
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struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg;
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pxa2x0_gpio_clear_intr(sc->sc_detect_pin);
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pxamci_card_detect_event(&sc->sc);
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return 1;
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}
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/*ARGSUSED*/
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static uint32_t
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wzero3mci_get_ocr(void *arg)
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{
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return MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V;
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}
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static int
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wzero3mci_set_power(void *arg, uint32_t ocr)
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{
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struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg;
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int error = 0;
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if (sc->sc_power_pin >= 0) {
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if (ISSET(ocr, MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V)) {
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/* power on */
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pxa2x0_gpio_set_bit(sc->sc_power_pin);
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} else if (ocr == 0) {
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/* power off */
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pxa2x0_gpio_clear_bit(sc->sc_power_pin);
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} else {
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aprint_error_dev(sc->sc.sc_dev,
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"unsupported OCR (%#x)\n", ocr);
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error = EINVAL;
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}
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}
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return error;
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}
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/*
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* Return non-zero if the card is currently inserted.
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*/
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static int
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wzero3mci_card_detect(void *arg)
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{
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struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg;
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if (sc->sc_detect_pin >= 0) {
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if (pxa2x0_gpio_get_bit(sc->sc_detect_pin))
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return 0;
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}
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return 1;
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}
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/*
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* Return non-zero if the card is currently write-protected.
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*/
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/*ARGSUSED*/
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static int
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wzero3mci_write_protect(void *arg)
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{
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return 0;
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}
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