mirror of https://gitee.com/openkylin/qemu.git
147 lines
3.1 KiB
C
147 lines
3.1 KiB
C
/*
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* SD card bus interface code.
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*
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* Copyright (c) 2015 Linaro Limited
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*
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* Author:
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* Peter Maydell <peter.maydell@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2 or later, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "hw/qdev-core.h"
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#include "sysemu/block-backend.h"
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#include "hw/sd/sd.h"
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static SDState *get_card(SDBus *sdbus)
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{
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/* We only ever have one child on the bus so just return it */
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BusChild *kid = QTAILQ_FIRST(&sdbus->qbus.children);
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if (!kid) {
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return NULL;
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}
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return SD_CARD(kid->child);
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}
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int sdbus_do_command(SDBus *sdbus, SDRequest *req, uint8_t *response)
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{
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SDState *card = get_card(sdbus);
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if (card) {
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SDCardClass *sc = SD_CARD_GET_CLASS(card);
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return sc->do_command(card, req, response);
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}
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return 0;
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}
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void sdbus_write_data(SDBus *sdbus, uint8_t value)
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{
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SDState *card = get_card(sdbus);
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if (card) {
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SDCardClass *sc = SD_CARD_GET_CLASS(card);
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sc->write_data(card, value);
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}
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}
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uint8_t sdbus_read_data(SDBus *sdbus)
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{
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SDState *card = get_card(sdbus);
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if (card) {
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SDCardClass *sc = SD_CARD_GET_CLASS(card);
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return sc->read_data(card);
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}
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return 0;
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}
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bool sdbus_data_ready(SDBus *sdbus)
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{
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SDState *card = get_card(sdbus);
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if (card) {
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SDCardClass *sc = SD_CARD_GET_CLASS(card);
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return sc->data_ready(card);
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}
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return false;
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}
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bool sdbus_get_inserted(SDBus *sdbus)
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{
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SDState *card = get_card(sdbus);
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if (card) {
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SDCardClass *sc = SD_CARD_GET_CLASS(card);
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return sc->get_inserted(card);
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}
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return false;
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}
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bool sdbus_get_readonly(SDBus *sdbus)
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{
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SDState *card = get_card(sdbus);
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if (card) {
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SDCardClass *sc = SD_CARD_GET_CLASS(card);
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return sc->get_readonly(card);
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}
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return false;
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}
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void sdbus_set_inserted(SDBus *sdbus, bool inserted)
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{
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SDBusClass *sbc = SD_BUS_GET_CLASS(sdbus);
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BusState *qbus = BUS(sdbus);
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if (sbc->set_inserted) {
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sbc->set_inserted(qbus->parent, inserted);
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}
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}
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void sdbus_set_readonly(SDBus *sdbus, bool readonly)
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{
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SDBusClass *sbc = SD_BUS_GET_CLASS(sdbus);
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BusState *qbus = BUS(sdbus);
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if (sbc->set_readonly) {
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sbc->set_readonly(qbus->parent, readonly);
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}
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}
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static const TypeInfo sd_bus_info = {
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.name = TYPE_SD_BUS,
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.parent = TYPE_BUS,
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.instance_size = sizeof(SDBus),
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.class_size = sizeof(SDBusClass),
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};
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static void sd_bus_register_types(void)
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{
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type_register_static(&sd_bus_info);
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}
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type_init(sd_bus_register_types)
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