IMX7 Dual and solo - RAM porting in u-boot

gopinathsriniva — Tue, 19 Dec 2017 12:20:00 GMT

Hello All,

I am working on porting two custom boards which uses IMX7 dual and solo with LPDDR3. I am following i.MX7D DRAM Register Programming Aid document for porting u-boot for LPDDR3. I have downloaded MX7D_LPDDR3_register_programming_aid_v1_4.xlsx document and configured the settings from my DRAM data sheets. Now I have the updated dstream.ds file.

Now below are my questions.

1. u-boot requires imximage.cfg as DCD structure for DRAM configuration. How to port this file (imximage.cfg) from dstream.ds file? Any tools available ? or I need to do it manually?

2. It seems MX7D_LPDDR3_register_programming_aid_v1_4.xlsx file is only for IMX7 Dual.(not sure). Why because when I referred warp7 development board which uses IMX7 solo, the imximage.cfg address values are different. For example, please refer difference between dual and solo cfg files. But when I checked the .ds file all the addresses are matching with IMX7 dual cfg files from sabreSD. So shall I use the same programming aid tool for solo ? or do I need a different one?

IMX7 Dual cfg file from SabreSD

/*
* Device Configuration Data (DCD)
*
* Each entry must have the format:
* Addr-type Address Value
*
* where:
* Addr-type register length (1,2 or 4 bytes)
* Address absolute address of the register
* value value to be stored in the register
*/

DATA 4 0x30340004 0x4F400005
/* Clear then set bit30 to ensure exit from DDR retention */
DATA 4 0x30360388 0x40000000
DATA 4 0x30360384 0x40000000

DATA 4 0x30391000 0x00000002
DATA 4 0x307a0000 0x01040001
DATA 4 0x307a01a0 0x80400003
DATA 4 0x307a01a4 0x00100020
DATA 4 0x307a01a8 0x80100004
............

DATA 4 0x307900c0 0x0e407304

DATA 4 0x30384130 0x00000000
DATA 4 0x30340020 0x00000178
DATA 4 0x30384130 0x00000002
DATA 4 0x30790018 0x0000000f

CHECK_BITS_SET 4 0x307a0004 0x

#endif

In case of warp7 board (IMX7 Solo)

DATA 4 0x020c4068 0xffffffff
DATA 4 0x020c406c 0xffffffff
DATA 4 0x020c4070 0xffffffff
DATA 4 0x020c4074 0xffffffff
DATA 4 0x020c4078 0xffffffff
DATA 4 0x020c407c 0xffffffff
DATA 4 0x020c4080 0xffffffff

DATA 4 0x020e0344 0x00003030
DATA 4 0x020e0348 0x00003030
DATA 4 0x020e034c 0x00003030
DATA 4 0x020e0350 0x00003030
DATA 4 0x020e030c 0x00000030

DATA 4 0x021b0004 0x00025564
DATA 4 0x021b0404 0x00011006
DATA 4 0x021b001c 0x0000000

Please give me your valuable suggestions.

Regards,

Gopinath S

Re: IMX7 Dual and solo - RAM porting in u-boot

igorpadykov — Tue, 19 Dec 2017 23:29:11 GMT

Hi Gopinath

1. changing file is performed manually, unfortunately there is no tool for that

2. yes one can use the same programming aid tool for solo

Best regards
igor
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i.MX ProcessorsのトピックRe: IMX7 Dual and solo - RAM porting in u-boot

IMX7 Dual and solo - RAM porting in u-boot

Re: IMX7 Dual and solo - RAM porting in u-boot