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Ultra Capacity SD cards (SDUC) was already introduced in SD7.0. Those cards support capacity larger than 2TB and up to including 128TB. ACMD41 was extended to support the host-card handshake during initialization. The card expects that the HCS & HO2T bits to be set in the command argument, and sets the applicable bits in the R3 returned response. On the contrary, if a SDUC card is inserted to a non-supporting host, it will never respond to this ACMD41 until eventually, the host will timed out and give up. Also, add SD CSD version 3.0 - designated for SDUC, and properly parse the csd register as the c_size field got expanded to 28 bits. Do not enable SDUC for now - leave it to the last patch in the series. Tested-by: Ricky WU <ricky_wu@realtek.com> Reviewed-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Avri Altman <avri.altman@wdc.com> Link: https://lore.kernel.org/r/20241006051148.160278-2-avri.altman@wdc.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.