I have a board that's got A20 with Samsung's SDRAM 'K4B1G1646G BCK0'. The problem I'm facing now is that I'm not able to get it to boot. I keep getting the following on debug UART:
U-Boot SPL 2014.04-10706-g36080eb (Aug 19 2014 - 16:42:16) DRAM:Timeout initialising DRAM resetting ... .... (Repeats infinitely) I suspected that the (old) '[dram_para]' in my FEX file was causing this, as it was configured for 'K4B4G1646D' (which is widely used). So, I edited the FEX file based on the info I could gather from the SDRAM's datasheet. It now looks like this: [dram_para] dram_baseaddr = 0x40000000 dram_clk = 384 dram_type = 3 dram_rank_num = 1 dram_chip_density = 1024 dram_io_width = 16 dram_bus_width = 32 dram_cas = 9 dram_zq = 0x7f dram_odt_en = 0 dram_size = 256 dram_tpr0 = 0x42d899b7 dram_tpr1 = 0xa090 dram_tpr2 = 0x22a00 dram_tpr3 = 0x0 dram_tpr4 = 0x0 dram_tpr5 = 0x0 dram_emr1 = 0x4 dram_emr2 = 0x10 dram_emr3 = 0x0 I tried booting with this but to no avail. The problem persists (same error). I looked for ways to get the DRAM info directly from the hardware and found meminfo in sunxi tools. I was able to compile (and run) it (on a A20 based commercial board), but I just can't figure out how to get it running on my board. Now, I'm confused- whether just setting the correct values in my FEX would suffice or would I have to rebuild U-Boot. I would appreciate if someone could point me in the right direction to solve this problem. Thanks. -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
