Hello, I'm experimenting with a tablet with an OMAP4460 SoC. It's not a development board with easy access to the sys_boot pins. It's factory defaults for sys_boot is 0x36 which defines a boot priority as follows: 1:MMC2(1) 2:USB(1) 3:UART 4:MMC1 scholbert from xda-developers identified some of the sys_boot pins: http://forum.xda-developers.com/attachment.php?attachmentid=1062421&d=1337087327 And now the tablet is modified with sys_boot = 0x16 1:USB(1) 2:UART 3:MMC1 4:MMC2(1) To check the modification: printf("sys_boot = 0x%08X\n", readl(0x4A0022C4)); sys_boot = 0x00000B16 Which confirms the modification is correct. for more information on this register see Table 18-178. CONTROL_STATUS on OMAP4460_1.x_TRM_vX Now the tablet has no cables connected (nor serial, nor usb), so what I expect is: 1) The SoC will detect there is no usb cable connected and will skip the 3 seconds timeout 2) The SoC will try to boot over serial port and will abort after a 300 ms timeout 3) A micro SD-card is inserted and is connected to the MMC1 controller so the SoC will detect and boot it. What really happens: 1) Don't know... 2) ... n) After less than a second MMC2(1) is booted. The contents of the SD-card are correct as I could make it boot on warm reset modifying accordingly the SAR memory. So the question is: why the SoC does not behave as expected? Has any body tried this? Does anybody has a development board in which testing this is easy? in such case, works? Thank you all, Vicente. _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
