* [PATCH] board: ti: j721e: README: Add documentation for eMMC boot
@ 2021-06-30 6:04 Aswath Govindraju
2021-06-30 22:46 ` Tom Rini
0 siblings, 1 reply; 2+ messages in thread
From: Aswath Govindraju @ 2021-06-30 6:04 UTC (permalink / raw)
Cc: u-boot, Lokesh Vutla, Vignesh Raghavendra,
Kishon Vijay Abraham I, Aswath Govindraju
Add instructions for flashing eMMC with bootloader images from SD.
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
---
board/ti/j721e/README | 59 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 59 insertions(+)
diff --git a/board/ti/j721e/README b/board/ti/j721e/README
index c33afa496e7d..edb26c38ae01 100644
--- a/board/ti/j721e/README
+++ b/board/ti/j721e/README
@@ -226,6 +226,65 @@ Image formats:
| +-------------------+ |
+-----------------------+
+eMMC:
+-----
+ROM supports booting from eMMC from boot0 partition offset 0x0
+
+Flashing images to eMMC:
+
+The following commands can be used to download tiboot3.bin, tispl.bin,
+u-boot.img, and sysfw.itb from an SD card and write them to the eMMC boot0
+partition at respective addresses.
+
+=> mmc dev 0 1
+=> fatload mmc 1 ${loadaddr} tiboot3.bin
+=> mmc write ${loadaddr} 0x0 0x400
+=> fatload mmc 1 ${loadaddr} tispl.bin
+=> mmc write ${loadaddr} 0x400 0x1000
+=> fatload mmc 1 ${loadaddr} u-boot.img
+=> mmc write ${loadaddr} 0x1400 0x2000
+=> fatload mmc 1 ${loadaddr} sysfw.itb
+=> mmc write ${loadaddr} 0x3600 0x800
+
+To give the ROM access to the boot partition, the following command must be
+used for the first time:
+
+=> mmc partconf 0 1 1 1
+
+To set bus width, reset bus width and data rate during boot, the following
+command must be used for the first time:
+
+=> mmc bootbus 0 2 0 0
+
+To create a software partition for the rootfs, the following command can be
+used:
+
+=> gpt write mmc 0 ${partitions}
+
+eMMC layout:
+
+ boot0 partition (8 MB) user partition
+ 0x0+----------------------------------+ 0x0+-------------------------+
+ | tiboot3.bin (512 KB) | | |
+ 0x400+----------------------------------+ | |
+ | tispl.bin (2 MB) | | |
+0x1400+----------------------------------+ | rootfs |
+ | u-boot.img (4 MB) | | |
+0x3400+----------------------------------+ | |
+ | environment (128 KB) | | |
+0x3500+----------------------------------+ | |
+ | backup environment (128 KB) | | |
+0x3600+----------------------------------+ | |
+ | sysfw (1 MB) | | |
+0x3E00+----------------------------------+ +-------------------------+
+
+Kernel image and DT are expected to be present in the /boot folder of rootfs.
+To boot kernel from eMMC, use the following commands:
+
+=> setenv mmcdev 0
+=> setenv bootpart 0
+=> boot
+
OSPI:
-----
ROM supports booting from OSPI from offset 0x0.
--
2.17.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] board: ti: j721e: README: Add documentation for eMMC boot
2021-06-30 6:04 [PATCH] board: ti: j721e: README: Add documentation for eMMC boot Aswath Govindraju
@ 2021-06-30 22:46 ` Tom Rini
0 siblings, 0 replies; 2+ messages in thread
From: Tom Rini @ 2021-06-30 22:46 UTC (permalink / raw)
To: Aswath Govindraju
Cc: u-boot, Lokesh Vutla, Vignesh Raghavendra, Kishon Vijay Abraham I
[-- Attachment #1: Type: text/plain, Size: 416 bytes --]
On Wed, Jun 30, 2021 at 11:34:29AM +0530, Aswath Govindraju wrote:
> Add instructions for flashing eMMC with bootloader images from SD.
>
> Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
> ---
> board/ti/j721e/README | 59 +++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 59 insertions(+)
This really needs to be converted to rST and moved under doc/board/ti/
thanks!
--
Tom
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2021-06-30 6:04 [PATCH] board: ti: j721e: README: Add documentation for eMMC boot Aswath Govindraju
2021-06-30 22:46 ` Tom Rini
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