From 97fb87cc5db87d449f16336226f71232a2054ff4 Mon Sep 17 00:00:00 2001 From: Clement Deschamps Date: Tue, 28 Feb 2017 14:55:09 +0000 Subject: hw/sd: add card-reparenting function Provide a new function sdbus_reparent_card() in sd core for reparenting a card from a SDBus to another one. This function is required by the raspi platform, where the two SD controllers can be dynamically switched. Signed-off-by: Clement Deschamps Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell Message-id: 1488293711-14195-3-git-send-email-peter.maydell@linaro.org Message-id: 20170224164021.9066-3-clement.deschamps@antfield.fr Reviewed-by: Peter Maydell [PMM: added a doc comment to the header file; changed to use new behaviour of qdev_set_parent_bus()] Signed-off-by: Peter Maydell --- hw/sd/core.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'hw/sd/core.c') diff --git a/hw/sd/core.c b/hw/sd/core.c index 14c2bdf27b..295dc44ab7 100644 --- a/hw/sd/core.c +++ b/hw/sd/core.c @@ -131,6 +131,33 @@ void sdbus_set_readonly(SDBus *sdbus, bool readonly) } } +void sdbus_reparent_card(SDBus *from, SDBus *to) +{ + SDState *card = get_card(from); + SDCardClass *sc; + bool readonly; + + /* We directly reparent the card object rather than implementing this + * as a hotpluggable connection because we don't want to expose SD cards + * to users as being hotpluggable, and we can get away with it in this + * limited use case. This could perhaps be implemented more cleanly in + * future by adding support to the hotplug infrastructure for "device + * can be hotplugged only via code, not by user". + */ + + if (!card) { + return; + } + + sc = SD_CARD_GET_CLASS(card); + readonly = sc->get_readonly(card); + + sdbus_set_inserted(from, false); + qdev_set_parent_bus(DEVICE(card), &to->qbus); + sdbus_set_inserted(to, true); + sdbus_set_readonly(to, readonly); +} + static const TypeInfo sd_bus_info = { .name = TYPE_SD_BUS, .parent = TYPE_BUS, -- cgit v1.2.3-55-g7522