SD/MMC driver to support additional feature

NTDEV
1

Hi,

Our Target device is eMMC 4.5 device in Windows 8 PC/Tab.
eMMC device is connnected to PCIe based SD/MMC host controller.
Drivers for eMMC is Microsoft SD card driver stack (Sdstor.sys, sdbus.lib and Sdbus.sys).

Our device works fine with microsoft driver stack.
Our device supports a feature called packed command.
We want to implement this packed command feature at driver level.

As read from MSDN, Sdstor driver invokes call exported from sdbus library. Sdbus library converts request to SD/MMC commands and send to sdbus driver.

Whether we need to write upper filter driver for sdbus.sys. I don’t know whether it is feasible to do.

Kindly suggest a method to implement this.

Thanks,
Raphel

2

I think you were already told 8.1 supports this command and honestly I don’t think there will be too many 8.0 machines in a year, they will all be 8.1

d

Bent from my phone

From: xxxxx@gmail.commailto:xxxxx
Sent: ?10/?23/?2013 9:43 PM
To: Windows System Software Devs Interest Listmailto:xxxxx
Subject: [ntdev] SD/MMC driver to support additional feature

Hi,

Our Target device is eMMC 4.5 device in Windows 8 PC/Tab.
eMMC device is connnected to PCIe based SD/MMC host controller.
Drivers for eMMC is Microsoft SD card driver stack (Sdstor.sys, sdbus.lib and Sdbus.sys).

Our device works fine with microsoft driver stack.
Our device supports a feature called packed command.
We want to implement this packed command feature at driver level.

As read from MSDN, Sdstor driver invokes call exported from sdbus library. Sdbus library converts request to SD/MMC commands and send to sdbus driver.

Whether we need to write upper filter driver for sdbus.sys. I don’t know whether it is feasible to do.

Kindly suggest a method to implement this.

Thanks,
Raphel

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3

Thanks Doron.

You clarified that Windows 8.1 supports packed command.
It will be good if 8.1 will replace all Win 8 OS.

But what can be done in case if we want to support this on *Windows 8 or
Windows 7*?
what are the possible ways to implement.

Thanks in advance.
Regards,
Raphel

On Thu, Oct 24, 2013 at 10:59 AM, Doron Holan wrote:

> I think you were already told 8.1 supports this command and honestly I
> don’t think there will be too many 8.0 machines in a year, they will all be
> 8.1
>
> d
>
> Bent from my phone
> ------------------------------
> From: xxxxx@gmail.com
> Sent: 10/23/2013 9:43 PM
> To: Windows System Software Devs Interest List
> Subject: [ntdev] SD/MMC driver to support additional feature
>
> Hi,
>
> Our Target device is eMMC 4.5 device in Windows 8 PC/Tab.
> eMMC device is connnected to PCIe based SD/MMC host controller.
> Drivers for eMMC is Microsoft SD card driver stack (Sdstor.sys, sdbus.lib
> and Sdbus.sys).
>
> Our device works fine with microsoft driver stack.
> Our device supports a feature called packed command.
> We want to implement this packed command feature at driver level.
>
> As read from MSDN, Sdstor driver invokes call exported from sdbus library.
> Sdbus library converts request to SD/MMC commands and send to sdbus driver.
>
> Whether we need to write upper filter driver for sdbus.sys. I don’t know
> whether it is feasible to do.
>
> Kindly suggest a method to implement this.
>
> Thanks,
> Raphel
>
> —
> NTDEV is sponsored by OSR
>
> Visit the list at: http://www.osronline.com/showlists.cfm?list=ntdev
>
> OSR is HIRING!! See http://www.osr.com/careers
>
> For our schedule of WDF, WDM, debugging and other seminars visit:
> http://www.osr.com/seminars
>
> To unsubscribe, visit the List Server section of OSR Online at
> http://www.osronline.com/page.cfm?name=ListServer
>
> —
> NTDEV is sponsored by OSR
>
> Visit the list at: http://www.osronline.com/showlists.cfm?list=ntdev
>
> OSR is HIRING!! See http://www.osr.com/careers
>
> For our schedule of WDF, WDM, debugging and other seminars visit:
> http://www.osr.com/seminars
>
> To unsubscribe, visit the List Server section of OSR Online at
> http://www.osronline.com/page.cfm?name=ListServer
>