Booting from OSPI / QSPI¶

• Table of contents
• Booting from OSPI / QSPI
  • XSPI Boot Mode for OSPI/QSPI
    • Steps
    • Flashing in u-boot from sdcard

See Boot_options for more details about the boot select pins

*NOTE: The XSPI boot mode can auto detect and boot the OSPI/QSPI NOR

XSPI Boot Mode for OSPI/QSPI¶

To boot the Dev Kit from OSPI/QSPI using a CL supplied image, set the boot pins as follows:

B3	B4	B5	B6	B7		B8	B9
0	1	1	1	Mode (0)		ReadCmd (0)	SFDP (1)

Steps¶

• boot to linux (i.e. from SD card).
• Check that the spi nor was detected
  Make note of the mtd# for tiboot3/tispl/u-boot as newer kernels are changing up the order...
  

  root@mitysom-am62x:~# cat /proc/mtd 
  dev:    size   erasesize  name
  mtd0: 00080000 00020000 "ospi.tiboot3" 
  mtd1: 00200000 00020000 "ospi.tispl" 
  mtd2: 00400000 00020000 "ospi.u-boot" 
  mtd3: 00040000 00020000 "ospi.env" 
  mtd4: 00040000 00020000 "ospi.env.backup" 
  mtd5: 0f7c0000 00020000 "ospi.rootfs" 
  mtd6: 00040000 00020000 "ospi.phypattern" 
  

• cd to boot partition (the directory containing tibot3.bin, etc.../run/media/mmcblk1p1 in my case.)
• Erase the NOR partitions
  

  root@mitysom-am62x:~# flash_erase /dev/mtd0 0 0
  root@mitysom-am62x:~# flash_erase /dev/mtd1 0 0
  root@mitysom-am62x:~# flash_erase /dev/mtd2 0 0
  

• copy the boot files to their respective locations in SPI NOR
  

  root@mitysom-am62x:~# cp tiboot3.bin /dev/mtd0
  root@mitysom-am62x:~# cp tispl.bin /dev/mtd1
  root@mitysom-am62x:~# cp u-boot.img /dev/mtd2
  

      0x0 +----------------------------+
          |     ospi.tiboot3(512k)     |
          |                            |
  0x80000 +----------------------------+
          |     ospi.tispl(2m)         |
          |                            |
 0x280000 +----------------------------+
          |     ospi.u-boot(4m)        |
          |                            |
 0x680000 +----------------------------+
          |     ospi.env(128k)         |
          |                            |
 0x6c0000 +----------------------------+
          |   ospi.env.backup(128k)    |
          |                            |
 0x740000 +----------------------------+
          |      padding (768k)        |
 0x800000 +----------------------------+
          |     ospi.rootfs(ubifs)     |
          |                            |
0xffc0000 +----------------------------+
          |   ospi.phypattern (256k)   |
          |                            |
          +----------------------------+

Flashing in u-boot from sdcard¶

sf update command erases before writing data

=> mmc rescan
=> sf probe
SF: Detected mt35xu02g with page size 256 Bytes, erase size 128 KiB, total 256 MiB
=> sf update $loadaddr 0x0 $filesize         
device 0 offset 0x0, size 0x4e172
319858 bytes written, 0 bytes skipped in 0.880s, speed 370933 B/s
=> fatload mmc 1 $loadaddr tispl.bin         
1554491 bytes read in 68 ms (21.8 MiB/s)
=> sf update $loadaddr 0x80000 $filesize
device 0 offset 0x80000, size 0x17b83b
1554491 bytes written, 0 bytes skipped in 3.735s, speed 425842 B/s
=> fatload mmc 1 $loadaddr u-boot.img   
1159387 bytes read in 51 ms (21.7 MiB/s)
=> sf update $loadaddr 0x280000 $filesize
device 0 offset 0x280000, size 0x11b0db
1159387 bytes written, 0 bytes skipped in 2.803s, speed 423097 B/s