c759a790b6
Add a QOM bus for SD cards to plug in to. Note that since sd_enable() is used only by one board and there only as part of a broken implementation, we do not provide it in the SDBus API (but instead add a warning comment about the old function). Whoever converts OMAP and the nseries boards to QOM will need to either implement the card switch properly or move the enable hack into the OMAP MMC controller model. In the SDBus API, the old-style use of sd_set_cb to register some qemu_irqs for notification of card insertion and write-protect toggling is replaced with methods in the SDBusClass which the card calls on status changes and methods in the SDClass which the controller can call to find out the current status. The query methods will allow us to remove the abuse of the 'register irqs' API by controllers in their reset methods to trigger the card to tell them about the current status again. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Alistair Francis <alistair.francis@xilinx.com> Message-id: 1455646193-13238-5-git-send-email-peter.maydell@linaro.org
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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