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| author | Clement Deschamps | 2017-02-28 15:55:09 +0100 |
|---|---|---|
| committer | Peter Maydell | 2017-02-28 18:10:00 +0100 |
| commit | 97fb87cc5db87d449f16336226f71232a2054ff4 (patch) | |
| tree | 3ed43e208ef0916826a68596068adb9fc850b285 /include/hw/sd | |
| parent | qdev: Have qdev_set_parent_bus() handle devices already on a bus (diff) | |
| download | qemu-97fb87cc5db87d449f16336226f71232a2054ff4.tar.gz qemu-97fb87cc5db87d449f16336226f71232a2054ff4.tar.xz qemu-97fb87cc5db87d449f16336226f71232a2054ff4.zip | |
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 <clement.deschamps@antfield.fr>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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 <peter.maydell@linaro.org>
[PMM: added a doc comment to the header file; changed to
use new behaviour of qdev_set_parent_bus()]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'include/hw/sd')
| -rw-r--r-- | include/hw/sd/sd.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/hw/sd/sd.h b/include/hw/sd/sd.h index 79909b2478..96caefe373 100644 --- a/include/hw/sd/sd.h +++ b/include/hw/sd/sd.h @@ -140,6 +140,17 @@ uint8_t sdbus_read_data(SDBus *sd); bool sdbus_data_ready(SDBus *sd); bool sdbus_get_inserted(SDBus *sd); bool sdbus_get_readonly(SDBus *sd); +/** + * sdbus_reparent_card: Reparent an SD card from one controller to another + * @from: controller bus to remove card from + * @to: controller bus to move card to + * + * Reparent an SD card, effectively unplugging it from one controller + * and inserting it into another. This is useful for SoCs like the + * bcm2835 which have two SD controllers and connect a single SD card + * to them, selected by the guest reprogramming GPIO line routing. + */ +void sdbus_reparent_card(SDBus *from, SDBus *to); /* Functions to be used by SD devices to report back to qdevified controllers */ void sdbus_set_inserted(SDBus *sd, bool inserted); |