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Old 03-31-2010, 03:42 AM   #1
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Registered: Mar 2010
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Unable to auto detect SD card connected to USB2640 hub controller


I am working on a custom board which has TI Davinci Processor running Linux 2.6.10 as the host processor to which we have a USB2640 hub controller connected on the USB bus. This hub controller has a built in SD card controller. So basically this hub supports two USB devices and one SD card.
The problem I am facing right now is that if the SD card is connected during kernel boot up, the SD card gets detected and also enumerated. After this I am able to mount the SD card.
But in case I plug in the SD card after kernel boot up, the SD card does not get detected.
The USB devices conected to the USB ports are detected when they are hot plugged.

So how do I enable hot plugging for the SD card?

Old 04-02-2010, 10:37 AM   #2
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Registered: Jan 2009
Location: Brazil
Distribution: debian
Posts: 16

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Ok, try this.
1 - Boot your linux box with a SD card connected.
2 - execute lsmod all modules loaded in the sistem will be displayed, try to find out the name of the module that your card is using, supose usb-storage
3 - re-boot again without the SD and try to load the module manually, the one you think you found in the previous step, using: modprobe module_name
I hope it works, and if does, you may put the command in /etc/rc.local, so then the module loads on boot time.

Last edited by tiekookeit; 04-02-2010 at 10:39 AM.


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