使用fel，下面的代码可以调通dram:

sunxi-fel writel 0x1C2015C 0x0 sunxi-fel writel 0x1C200FC 0x0 sunxi-fel writel 0x1C20060 0x1000000 sunxi-fel writel 0x1C202C0 0x1000000 sunxi-fel writel 0x1C20020 0x1000 10 sunxi-fel writel 0x1C20100 0x0 1000 sunxi-fel writel 0x1C20020 0x80101D00 5500 sunxi-fel writel 0x1C200F4 0x10000 sunxi-fel writel 0x1C202C0 0x1004000 sunxi-fel writel 0x1C20060 0x1004000 sunxi-fel writel 0x1C2015C 0x80000000 sunxi-fel writel 0x1C200FC 0x80000000 sunxi-fel writel 0x1C200F4 0x80000000 10 sunxi-fel writel 0x1C6300C 0xC00E 500 sunxi-fel writel 0x1C62000 0x4219E4 sunxi-fel writel 0x1C63030 0x263 sunxi-fel writel 0x1C63034 0x4 sunxi-fel writel 0x1C63038 0 sunxi-fel writel 0x1C6303C 0 sunxi-fel writel 0x1C63058 0x8091B09 sunxi-fel writel 0x1C6305C 0x2020C sunxi-fel writel 0x1C63060 0x3030307 sunxi-fel writel 0x1C63064 0x200C sunxi-fel writel 0x1C63068 0x4010203 sunxi-fel writel 0x1C6306C 0x5050403 sunxi-fel writel 0x1C63078 0x90006610 sunxi-fel writel 0x1C63080 0x2010101 sunxi-fel writel 0x1C63050 0xB523281 sunxi-fel writel 0x1C63054 0x16911941 sunxi-fel writel 0x1C63090 0x2B003C sunxi-fel writel 0x1C62090 0x10190 sunxi-fel writel 0x1C62098 0x1 sunxi-fel writel 0x1C62010 0x200000D sunxi-fel writel 0x1C62014 0x800100 sunxi-fel writel 0x1C62018 0x6000009 sunxi-fel writel 0x1C6201C 0x1000400 sunxi-fel writel 0x1C62020 0x200000D sunxi-fel writel 0x1C62024 0x600100 sunxi-fel writel 0x1C62028 0x100000D sunxi-fel writel 0x1C6202C 0x200080 sunxi-fel writel 0x1C62030 0x7000009 sunxi-fel writel 0x1C62034 0x1000640 sunxi-fel writel 0x1C62038 0x100000D sunxi-fel writel 0x1C6203C 0x200080 sunxi-fel writel 0x1C62040 0x1000009 sunxi-fel writel 0x1C62044 0x400080 sunxi-fel writel 0x1C62048 0x100000D sunxi-fel writel 0x1C6204C 0x400080 sunxi-fel writel 0x1C62050 0x100000D sunxi-fel writel 0x1C62054 0x400080 sunxi-fel writel 0x1C62058 0x4000009 sunxi-fel writel 0x1C6205C 0x400100 sunxi-fel writel 0x1C62060 0x2000030D sunxi-fel writel 0x1C62064 0x4001800 sunxi-fel writel 0x1C62068 0x4000009 sunxi-fel writel 0x1C6206C 0x400120 sunxi-fel writel 0x1C63100 0x4005400 sunxi-fel writel 0x1C63104 0x4680C620 sunxi-fel writel 0x1C62800 0x94BE6FA3 100 sunxi-fel writel 0x1C63888 0x80500010 sunxi-fel writel 0x1C62800 0x0 100 sunxi-fel writel 0x1C63344 0x7C0002A1 sunxi-fel writel 0x1C633C4 0x7C0002A1 sunxi-fel writel 0x1C63444 0x20 sunxi-fel writel 0x1C634C4 0x20 sunxi-fel writel 0x1C63208 0x34A sunxi-fel writel 0x1C63108 0x2CC0 sunxi-fel writel 0x1C63100 0x4000400 sunxi-fel writel 0x1C63108 0x26C0 sunxi-fel writel 0x1C630C0 0x81003087 sunxi-fel writel 0x1C63310 0x10 sunxi-fel writel 0x1C63314 0x10 sunxi-fel writel 0x1C63318 0x10 l sunxi-fel writel 0x1C6331C 0x10 sunxi-fel writel 0x1C63320 0x10 sunxi-fel writel 0x1C63324 0x10 sunxi-fel writel 0x1C63328 0x10 sunxi-fel writel 0x1C6332C 0x10 sunxi-fel writel 0x1C63330 0x10 sunxi-fel writel 0x1C63390 0xE sunxi-fel writel 0x1C63394 0xE sunxi-fel writel 0x1C63398 0xE sunxi-fel writel 0x1C6339C 0xE sunxi-fel writel 0x1C633A0 0xE sunxi-fel writel 0x1C633A4 0xE sunxi-fel writel 0x1C633A8 0xE sunxi-fel writel 0x1C633AC 0xE sunxi-fel writel 0x1C633B0 0xE sunxi-fel writel 0x1C63410 0x10 sunxi-fel writel 0x1C63414 0x10 sunxi-fel writel 0x1C63418 0x10 sunxi-fel writel 0x1C6341C 0x10 sunxi-fel writel 0x1C63420 0x10 sunxi-fel writel 0x1C63424 0x10 sunxi-fel writel 0x1C63428 0x10 sunxi-fel writel 0x1C6342C 0x10 sunxi-fel writel 0x1C63430 0x10 sunxi-fel writel 0x1C63490 0xE sunxi-fel writel 0x1C63494 0xE sunxi-fel writel 0x1C63498 0xE sunxi-fel writel 0x1C6349C 0xE sunxi-fel writel 0x1C634A0 0xE sunxi-fel writel 0x1C634A4 0xE sunxi-fel writel 0x1C634A8 0xE sunxi-fel writel 0x1C634AC 0xE sunxi-fel writel 0x1C634B0 0xE sunxi-fel writel 0x1C63100 0x400 sunxi-fel writel 0x1C63334 0x400 sunxi-fel writel 0x1C63338 0x400 sunxi-fel writel 0x1C633B4 0x400 sunxi-fel writel 0x1C633B8 0x400 sunxi-fel writel 0x1C63434 0xA00 sunxi-fel writel 0x1C63438 0xA00 sunxi-fel writel 0x1C634B4 0x600 sunxi-fel writel 0x1C634B8 0x600 sunxi-fel writel 0x1C63100 0x4000400 1 50 sunxi-fel writel 0x1C63150 0xA0A0A0A sunxi-fel writel 0x1C63140 0xBBBBBB sunxi-fel writel 0x1C63000 0x8000000 sunxi-fel writel 0x1C63000 0x3 sunxi-fel writel 0x1C63150 0xA0A0A0A sunxi-fel writel 0x1C63000 0x8000000 sunxi-fel writel 0x1C63000 0x3 sunxi-fel writel 0x1C63140 0xBBBBBB sunxi-fel writel 0x1C63000 0x8000000 sunxi-fel writel 0x1C63000 0x3 sunxi-fel writel 0x1C63150 0xA0A0A0A sunxi-fel writel 0x1C63000 0x8000000 sunxi-fel writel 0x1C63000 0x3 sunxi-fel writel 0x1C63140 0x999999 sunxi-fel writel 0x1C63000 0x8000000 sunxi-fel writel 0x1C63000 0x3 sunxi-fel writel 0x1C63150 0xE0E0E0E sunxi-fel writel 0x1C63000 0x8000000 sunxi-fel writel 0x1C63000 0x3 sunxi-fel writel 0x1C63140 0x333333 sunxi-fel writel 0x1C63000 0x8000000 sunxi-fel writel 0x1C63000 0x3 sunxi-fel writel 0x1C63150 0x7070707 sunxi-fel writel 0x1C63000 0x8000000 sunxi-fel writel 0x1C63000 0x3 sunxi-fel writel 0x1C63148 0xA0A0A0A sunxi-fel writel 0x1C6314C 0x7070E0E sunxi-fel writel 0x1C63000 0x571 sunxi-fel writel 0x1C6308C 0x80200010 10 sunxi-fel writel 0x1C6308C 0x200010 10 sunxi-fel writel 0x1C6310C 0xAA0060 sunxi-fel writel 0x1C63140 0x80333333 sunxi-fel writel 0x1C62094 0xFFFFFFFF sunxi-fel writel 0x1C63120 0x201 1 sunxi-fel writel 0x1C6307C 0x4000400 sunxi-fel writel 0x1C63108 0x6C0 sunxi-fel writel 0x1C620D0 0x80103040 10 sunxi-fel writel 0x1C62000 0x4216F0 sunxi-fel writel 0x40000000 0x0 sunxi-fel writel 0x40400000 0xAA55AA55 sunxi-fel writel 0x40000000 0x0 sunxi-fel writel 0x40800000 0xAA55AA55 sunxi-fel writel 0x40000000 0x0 sunxi-fel writel 0x41000000 0xAA55AA55 sunxi-fel writel 0x1C62000 0x421AC0 sunxi-fel writel 0x40000000 0x0 sunxi-fel writel 0x40000200 0xAA55AA55 sunxi-fel writel 0x40000000 0x0 sunxi-fel writel 0x40000400 0xAA55AA55 sunxi-fel writel 0x40000000 0 sunxi-fel writel 0x40000800 0xAA55AA55 sunxi-fel writel 0x1C62000 0x4218C0