Interfacing eMMC Memory with OMAP4460

Rushi Gajjar

Other Parts Discussed in Thread: TWL6030, TWL6040

Hi,

I am interfacing the 8GB eMMC with OMAP4460. Basically I am referencing the Pandaboard ES schematics Design, As per the eMMC datasheet, I need to interface DAT[0:7], nRST, CMD, CLK with the OMAP processor. As per the OMAP TRM I have interfaced the eMMC with following pins:

I am connecting eMMC on SDMMC2 port.

Pin Mapping of OMAP4460 with eMMC
BALL	OMAP PIN	eMMC PIN
C12	sdmmc_dat0	DAT0
D12	sdmmc_dat1	DAT1
C13	sdmmc_dat2	DAT2
D13	sdmmc_dat3	DAT3
C15	sdmmc_dat4	DAT4
D15	sdmmc_dat5	DAT5
A16	sdmmc_dat6	DAT6
B16	sdmmc_dat7	DAT7
B11	sdmmc2_clk	CLK
B12	sdmmc2_cmd	CMD
B23	gpio_62	nRST

With this configuration, we can observe that eMMC is connected on SDMMC2 interface.

Coming to Hardware,

I have connected the [7:0] switch to SYSBOOT[7:0] pins without any signal inversion, so that I can setup any boot mode.

[Please Note: On my hardware, there is no Display Connection Facility.]

Now,

Is this the correct flow to follow?

1) Post OS on the SD card. (ubuntu/Angstrom)

2) Set these switches to boot from SD card.

3) Connect Board with ssh connection through Ethernet with PC.

4) Install the drivers of eMMC while connected with SD

5) Copying u-boot to eMMC (From SD)

6) Building the x-boot to eMMC (From SD)

7) Copying the Kernel to eMMC (From SD)

8) Poweroff
9) Set the Switches to boot from eMMC

10) Poweron

From where to get these eMMC drivers?

Is this the correct flow?

Please discuss.

Thanks.

over 10 years ago

Rushi Gajjar over 10 years ago

Intellectual 765 points

This post was somewhat useful,
http://omappedia.org/wiki/4AJ.2.5P2_OMAP4_Jelly_Bean_Release_Notes#Flashing_the_OMAP4_Hardware

But I need the proper procedure, as per I described in the question above.

Yanko Todorov-XID over 10 years ago in reply to Rushi Gajjar

TI__Mastermind 29520 points

Hello Rushi,

At first, I suggest you to see following threads:

http://e2e.ti.com/support/omap/f/885/p/322851/1126053.aspx

http://e2e.ti.com/support/omap/f/849/p/362153/1273918.aspx

http://e2e.ti.com/support/omap/f/849/p/360787/1270543.aspx

Could you explain more information about your software and hardware?

Do you use TI's software releases for OMAP4?

What is the eMMC devices on your board?

See eMMC patches - https://bugs.launchpad.net/ubuntu/+source/u-boot-linaro/+bug/867650

http://lists.denx.de/pipermail/u-boot/2013-August/160783.html

Best regards,

Yanko

Rushi Gajjar over 10 years ago in reply to Yanko Todorov-XID

Intellectual 765 points

Hi Yanko,

Thanks for the immediate reply.

A brief on Hardware.

OMAP4460, Audio Codec TWL6040, Power Management TWL6030, Interfaced 2GB LPDDR2, SDMMC Card on SDMMC1 Port, USB, Ethernet, NO DVI/HDMI Support, NO Display Driver IS and

8GB eMMC (Micron,MTFC8GLDDQ-4M IT) on SDMMC2 port of OMAP4460.

Except memory, rest of the hardware is similar to PandaBoard.

A note on Software:

I haven't started on the software yet, but I will mostly use the OS which has eMMC support. L24.9-Pandaboard minimal-rootfs or Ubuntu for Pandaboard or Linaro

With reference to your question "TI's Software Release", did you mean this or this?

I will dig more into these links provided by you, but meanwhile, please provide your insight on these configuration and the OS suitable for my needs. I know that there would be a need to develop or edit the drivers, I need to choose the OS which requires least efforts.

Yanko Todorov-XID over 10 years ago in reply to Rushi Gajjar

TI__Mastermind 29520 points

Hello Rushi,

If you intend to run Ubuntu on OMAP4, you must use the official GLP packed for OMAP4:

http://e2e.ti.com/support/omap/f/849/p/255962/896615.aspx#896615

Follow steps described in this tutorial: http://www.omappedia.com/wiki/Ubuntu_kernel_for_OMAP4

I suggest you to use u-boot in OMAP4 JB release - http://www.omappedia.com/wiki/4AJ.2.5P2_OMAP4_Jelly_Bean_Release_Notes

Test your system with this u-boot.

Best regards,

Yanko

Yanko Todorov-XID over 10 years ago in reply to Yanko Todorov-XID

TI__Mastermind 29520 points

Hello Rushi,

I would like to notice you that Panda board does not have emmc device.

For this reason, I suggest you to use Blaze board configurations for your custom board. Because, there is available emmc device.

See following links with information -

http://omappedia.org/wiki/Using_EMMC_on_OMAP4_devices

Check and apply uboot emmc support described in this link - https://bugs.launchpad.net/ubuntu/+source/u-boot-linaro/+bug/867650

Best regards,

Yanko

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Interfacing eMMC Memory with OMAP4460