projects / people / ms / u-boot.git / blame
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1 | U-Boot for the Freescale i.MX6q SabreLite board |
| 2 | ||
| 3 | This file contains information for the port of U-Boot to the Freescale | |
| 4 | i.MX6q SabreLite board. | |
| 5 | ||
| 6 | 1. Boot source, boot from SD card | |
| 7 | --------------------------------- | |
| 8 | ||
| 9 | The recent mainline U-Boot for the Freescale i.MX6q SabreLite board supports | |
| 4e187fbc | 10 | boot from SD card only. However, by default, the SabreLite |
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11 | boards boot from the SPI NOR flash. These boards need to be reflashed with |
| 12 | a small SD card loader to support boot from SD card. This small SD card loader | |
| 13 | will be flashed into the SPI NOR. The board will still boot from SPI NOR, but | |
| 14 | the loader will in turn request the BootROM to load the U-Boot from SD card. | |
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15 | |
| 16 | The SD card loader is available from | |
| 17 | ||
| 18 | https://wiki.linaro.org/Boards/MX6QSabreLite | |
| 19 | ||
| 20 | under a open-source 3-clause BSD license. | |
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21 | |
| 22 | To update the SPI-NOR on the SabreLite board without the Freescale | |
| 23 | manufacturing tool use the following procedure: | |
| 24 | ||
| 25 | 1. Write this SD card loader onto a large SD card using: | |
| 26 | ||
| 4e187fbc | 27 | sudo dd if=iMX6DQ_SPI_to_uSDHC3.bin of=/dev/sXx |
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28 | |
| 29 | Note: Replace sXx with the device representing the SD card in your system. | |
| 30 | ||
| 31 | Note: This writes SD card loader at address 0 | |
| 32 | ||
| 33 | 2. Put this SD card into the slot for the large SD card (SD3 on the bottom of | |
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34 | the board). Make sure SW1 switch is at position "00", so that it can boot |
| 35 | from the fuses. | |
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36 | |
| 37 | 3. Power-up the SabreLite, press 'space' to enter command mode in the U-Boot | |
| 38 | (the default one the board is shipped with, starting from the SPI NOR) and | |
| 39 | enter the following commands: | |
| 40 | ||
| 41 | MX6Q SABRELITE U-Boot > mmc dev 0 | |
| 42 | MX6Q SABRELITE U-Boot > mmc read 0x10800000 0 200 | |
| 7a3f481c | 43 | MX6Q SABRELITE U-Boot > sf probe |
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44 | MX6Q SABRELITE U-Boot > sf erase 0 0x40000 |
| 45 | MX6Q SABRELITE U-Boot > sf write 0x10800000 0 0x40000 | |
| 46 | ||
| 47 | 4. done. | |
| 48 | ||
| 49 | In case you somehow do not succeed with this procedure you will have to use | |
| 50 | the Freescale manufacturing tool in order to reflash the SPI-NOR. | |
| 51 | ||
| 52 | Note: The board now boots from full size SD3 on the bottom of the board. NOT | |
| 53 | the micro SD4/BOOT slot on the top of the board. I.e. you have to use | |
| 54 | full size SD cards. | |
| 55 | ||
| 56 | This information is taken from | |
| 57 | ||
| 58 | https://wiki.linaro.org/Boards/MX6QSabreLite | |
| 59 | ||
| 60 | 2. Build | |
| 61 | -------- | |
| 62 | ||
| 63 | To build U-Boot for the SabreLite board: | |
| 64 | ||
| 65 | make mx6qsabrelite_config | |
| 55600288 | 66 | make |
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67 | |
| 68 | To copy the resulting u-boot.imx to the SD card: | |
| 69 | ||
| 70 | sudo dd if=u-boot.imx of=/dev/sXx bs=512 seek=2&&sudo sync | |
| 71 | ||
| 72 | Note: Replace sXx with the device representing the SD card in your system. |