Hi Norman
On Fri, Mar 20, 2015 at 4:10 PM, Norman Feske <norman.feske@...1...> wrote:
Hello Praveen,
We have developed a Genode device driver for USDHC card reader for Freescale i.MX6 procesor.
You may find the corresponding code in the repository, https://github.com/srinivasprv/genode
The specific driver code is available in usdhc directory of sd_card directory.
thank you for sharing your work with us! Your patch looks very nice.
Thank you.
Coincidentally, we just added an SD-card driver for the i.MX53 platform last week. See the following commit referenced at the following issue:
https://github.com/genodelabs/genode/issues/1458
Whereas the i.MX53 driver addresses the so-called ESDHC controller, your patch addresses the USDHC controller. Are both drivers complementary?
As Martin replied, there were some new register definitions in USDHC and some common registers differ. For example, the lower 16 bit-fields of CMD register(called XFER_TYPE in ESDHC), are defined in Mixer_Control register for USDHC.
Also USDHC returns CSD register shifted by 8 bits. That has to be handled in read_csd() function of the controller code.
Regards Praveen Srinivas IIT Madras
On another note, the mainline Genode version does not officially support i.MX6 yet. So I am afraid that including your driver without prior enabling i.MX6 would not be very sensible. As a precondition, we should enable at least one i.MX6-based platform (e.g., Wandboard?). Otherwise, we would not able to add your driver to our regular test infrastructure. What do you think about how to go about it?
Best regards Norman
-- Dr.-Ing. Norman Feske Genode Labs
http://www.genode-labs.com · http://genode.org
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