hrev54886 adds 1 changeset to branch 'master'
old head: f8650bc2db0e87d9577f109bf92d6256ebafff0a
new head: 2aa5a0353de1a64683667938553cd01dc8706ddc
overview:
https://git.haiku-os.org/haiku/log/?qt=range&q=2aa5a0353de1+%5Ef8650bc2db0e
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2aa5a0353de1: mmc_disk: disable currently non working code
Switching to 4 bit mode requires some more coordination as the host
controller must also be switched, right after sending this command.
I will revisit this, but the previous commit was accidentally pushed to
master.
At least we get the 25MHz clock instead of 400kHz, that should already
be quite a performance improvement.
[ Adrien Destugues <pulkomandy@xxxxxxxxxxxxx> ]
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Revision: hrev54886
Commit: 2aa5a0353de1a64683667938553cd01dc8706ddc
URL: https://git.haiku-os.org/haiku/commit/?id=2aa5a0353de1
Author: Adrien Destugues <pulkomandy@xxxxxxxxxxxxx>
Date: Tue Jan 12 21:47:58 2021 UTC
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1 file changed, 2 insertions(+)
src/add-ons/kernel/drivers/disk/mmc/mmc_disk.cpp | 2 ++
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diff --git a/src/add-ons/kernel/drivers/disk/mmc/mmc_disk.cpp
b/src/add-ons/kernel/drivers/disk/mmc/mmc_disk.cpp
index 8fc2ca49f0..c80d7fc444 100644
--- a/src/add-ons/kernel/drivers/disk/mmc/mmc_disk.cpp
+++ b/src/add-ons/kernel/drivers/disk/mmc/mmc_disk.cpp
@@ -170,6 +170,7 @@ mmc_block_get_geometry(mmc_disk_driver_info* info,
device_geometry* geometry)
geometry->read_only = false; // TODO check write protect switch?
geometry->write_once = false;
+#if 0
// This function will be called before all data transfers, so we use
this
// opportunity to switch the card to 4-bit data transfers (instead of
the
// default 1 bit mode)
@@ -179,6 +180,7 @@ mmc_block_get_geometry(mmc_disk_driver_info* info,
device_geometry* geometry)
info->rca << 16, &cardStatus);
info->mmc->execute_command(info->parent, info->rca, SD_SET_BUS_WIDTH,
k4BitMode, &cardStatus);
+#endif
return B_OK;
}
