projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| d67b0d97 EN |
1 | U-Boot for the Boundary Devices Nitrogen6X and |
| 2 | Freescale i.MX6Q SabreLite boards | |
| 3 | ||
| 4 | This file contains information for the port of | |
| 5 | U-Boot to the Boundary Devices Nitrogen6X and | |
| 6 | Freescale i.MX6Q SabreLite boards. | |
| 7 | ||
| 8 | 1. Boot source, boot from SPI NOR | |
| 9 | --------------------------------- | |
| 10 | The configuration in this directory supports both the | |
| 11 | Nitrogen6X and Freescale SabreLite board, but in a | |
| 12 | different fashion from Freescale's implementation in | |
| 13 | board/freescale/mx6qsabrelite. | |
| 14 | ||
| 15 | In particular, this image supports booting from SPI NOR | |
| 16 | and saving the environment to SPI NOR. | |
| 17 | ||
| 18 | It does not support 'boot from SD' at offset 0x400 | |
| 19 | except through the 'bmode' command. | |
| 20 | http://lists.denx.de/pipermail/u-boot/2012-August/131151.html | |
| 21 | ||
| 22 | 2. Boots using 6x_bootscript on SATA or SD card | |
| 23 | ----------------------------------------------- | |
| 24 | The default bootcmd for these boards is configured | |
| 25 | to look for and source a boot script named '6x_bootscript' | |
| 26 | in the root of the first partition of the following | |
| 27 | devices: | |
| 28 | ||
| 29 | sata 0 | |
| 30 | mmc 0 | |
| 31 | mmc 1 | |
| 32 | ||
| 33 | They're searched in the order listed above, trying both the | |
| 34 | ext2 and fat filesystems. | |
| 35 | ||
| 36 | 2. Maintaining the SPI NOR | |
| 37 | -------------------------- | |
| 38 | A couple of convenience commands | |
| 39 | ||
| 40 | clearenv - clear environment to factory default | |
| 41 | upgradeu - look and source a boot script named | |
| 42 | '6x_upgrade' to upgrade the U-Boot version | |
| 43 | in SPI NOR. The search is the same as for | |
| 44 | 6x_bootscript described above. | |
| 45 | ||
| 46 | 3. Display support | |
| 47 | ------------------ | |
| 48 | U-Boot support for the following displays is configured by | |
| 49 | default: | |
| 50 | ||
| 51 | HDMI - 1024 x 768 for maximum compatibility | |
| 52 | Hannstar-XGA - 1024 x 768 LVDS (Freescale part number MCIMX-LVDS1) | |
| 53 | wsvga-lvds - 1024 x 600 LVDS (Boundary p/n Nit6X_1024x600) | |
| 54 | wvga-rgb - 800 x 480 RGB (Boundary p/n Nit6X_800x480) | |
| 55 | ||
| 56 | Since the ipuv3_fb display driver currently supports only a single display, | |
| 57 | this code auto-detects panel by probing the HDMI Phy for Hot Plug Detect | |
| 58 | or the I2C touch controller of the LVDS and RGB displays in the priority | |
| 59 | listed above. | |
| 60 | ||
| 61 | Setting 'panel' environment variable to one of the names above will | |
| 62 | override auto-detection and force activation of the specified panel. | |
| 63 | ||
| 64 | 4. Building | |
| 65 | ------------ | |
| 66 | ||
| 67 | To build U-Boot for one of the Nitrogen6x or SabreLite board: | |
| 68 | ||
| 69 | make nitrogen6x_config | |
| 7aa378ec | 70 | make |
| d67b0d97 EN |
71 | |
| 72 | Note that 'nitrogen6x' is a placeholder. The complete list of supported | |
| fd5cc218 | 73 | board configurations is shown in the boards.cfg file: |
| d67b0d97 EN |
74 | nitrogen6q i.MX6Q/6D 1GB |
| 75 | nitrogen6dl i.MX6DL 1GB | |
| 76 | nitrogen6s i.MX6S 512MB | |
| 77 | nitrogen6q2g i.MX6Q/6D 2GB | |
| 78 | nitrogen6dl2g i.MX6DL 2GB | |
| 79 | nitrogen6s1g i.MX6S 1GB | |
| 80 | ||
| 81 | The -6q variants support either the i.MX6Quad or i.MX6Dual processors | |
| 82 | and are configured for a 64-bit memory bus at 1066 MHz. | |
| 83 | ||
| 84 | The -6dl variants also use a 64-bit memory bus, operated at 800MHz. | |
| 85 | ||
| 86 | The -6s variants use a 32-bit memory bus at 800MHz. | |
| 87 | ||
| 88 | If you place the u-boot.imx into a single-partition SD card | |
| 89 | along with a binary version of the boot script 6x_upgrade.txt, | |
| 90 | you can program it using 'upgradeu': | |
| 91 | ||
| 92 | U-Boot> run upgradeu |