beaglebone sd card driver belongs to platform driver or linux device driver

Baskaran Balachandran

Hi,

I am Baskar, bought Beaglebone board a longtime back. But only now i got time to work on that. I am quite new to embedded linux device driver development. My question when i power on the beaglebone, the linux image taken from SD card. Where the sd card drivers will be loaded from during boot? will uboot have the support? How the SD card viewed after linux boot completd? Sorry if this already answered and post link will be great helpful. Basically i my doubt is SD card will be looked as block device, but while booting how it is detected and image is copied?

Thank you,

Baskar

over 11 years ago

0 Biser Gatchev-XID over 11 years ago

TI__Guru**** 393215 points

Hi Baskar,

There is ROM code inside the AM335X which takes care of this. You can find more information in the AM335X Technical Reference Manual, Rev. J (http://www.ti.com/lit/ug/spruh73j/spruh73j.pdf ). Check section 26. MMC boot is described in subsection 26.1.7.5.

0 Baskaran Balachandran over 11 years ago in reply to Biser Gatchev-XID

Prodigy 90 points

Hi Biser,

Thank you for the quick reply. It helped to understand about the initialization. One more question. After the OS is loaded, can we access the SD card?

Thank you,

Baskar

0 Biser Gatchev-XID over 11 years ago in reply to Baskaran Balachandran

TI__Guru**** 393215 points

Yes, the driver should be loaded by the OS.

0 Robinson lei over 9 years ago in reply to Biser Gatchev-XID

Intellectual 600 points

hello Biser Gatchev-XID

OS contain what content ?

Processors

Processors forum

beaglebone sd card driver belongs to platform driver or linux device driver