[U-Boot] iMX31 nand driver

Hi,

I'm designing a board that uses a i.MX31 and a Nand Flash conected to the Nand Flash controller of i.MX31. I use git to get latest revision of u-boot code, and apply the patches to get mx31 nand drivers from *Magnus Lilja *posted at *Wed Aug 6 14:19:20 CEST 2008* mailing list. I got u-boot + nand drivers compiled, but when I run it I got weird results when reading flash, like data is reading in reverse order in buffer. I think that, in a blank Flash, I would get 0xffffffff on starting addresses (0x00000000), but i was getting 0x30303030. More strange is that if I read address 0xB8000000 after 'nand read', I'll get same content of buffer memory where I put the result of nand read. Below I put some capture what I did.

Could you know told me if it is ok? Sincerely I suspect that is inverted on buffer. 0x30303030 code would must be on spare area of NANDFC.

Regards,

Fabio

---- Nand chip is a Micron MT29F2G08AACWP: Page size x8: 2,112 bytes (2,048 + 64 bytes), Block size: 64 pages (128K + 4K bytes), Device size: 2Gb: 2,048 blocks;

---

nand info Device 0: NAND 256MiB 3,3V 8-bit, sector size 128 KiB uboot> nand device 0 Device 0: NAND 256MiB 3,3V 8-bit... is now current device uboot> nand read 0x80000000 0x0 0x20000 NAND read: device 0 offset 0x0, size 0x20000 131072 bytes read: OK uboot> md 0x80000000 80000000: 30303030 30303030 30303030 30303030 0000000000000000 80000010: 30303030 30303030 30303030 30303030 0000000000000000 80000020: 30303030 30303030 30303030 30303030 0000000000000000 80000030: 30303030 30303030 30303030 30303030 0000000000000000 80000040: 30303030 30303030 ffffffff ffffffff 00000000........ 80000050: ffffffff ffffffff ffffffff ffffffff ................ 80000060: ffffffff ffffffff ffffffff ffffffff ................ 80000070: ffffffff ffffffff ffffffff ffffffff ................ 80000080: ffffffff ffffffff ffffffff ffffffff ................ 80000090: ffffffff ffffffff ffffffff ffffffff ................ 800000a0: ffffffff ffffffff ffffffff ffffffff ................ 800000b0: ffffffff ffffffff ffffffff ffffffff ................ 800000c0: ffffffff ffffffff ffffffff ffffffff ................ 800000d0: ffffffff ffffffff ffffffff ffffffff ................ 800000e0: ffffffff ffffffff ffffffff ffffffff ................ 800000f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> 80000100: ffffffff ffffffff ffffffff ffffffff ................ 80000110: ffffffff ffffffff ffffffff ffffffff ................ 80000120: ffffffff ffffffff ffffffff ffffffff ................ 80000130: ffffffff ffffffff ffffffff ffffffff ................ 80000140: ffffffff ffffffff ffffffff ffffffff ................ 80000150: ffffffff ffffffff ffffffff ffffffff ................ 80000160: ffffffff ffffffff ffffffff ffffffff ................ 80000170: ffffffff ffffffff ffffffff ffffffff ................ 80000180: ffffffff ffffffff ffffffff ffffffff ................ 80000190: ffffffff ffffffff ffffffff ffffffff ................ 800001a0: ffffffff ffffffff ffffffff ffffffff ................ 800001b0: ffffffff ffffffff ffffffff ffffffff ................ 800001c0: ffffffff ffffffff ffffffff ffffffff ................ 800001d0: ffffffff ffffffff ffffffff ffffffff ................ 800001e0: ffffffff ffffffff ffffffff ffffffff ................ 800001f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> 80000200: ffffffff ffffffff ffffffff ffffffff ................ 80000210: ffffffff ffffffff ffffffff ffffffff ................ 80000220: ffffffff ffffffff ffffffff ffffffff ................ 80000230: ffffffff ffffffff ffffffff ffffffff ................ 80000240: ffffffff ffffffff ffffffff ffffffff ................ 80000250: ffffffff ffffffff ffffffff ffffffff ................ 80000260: ffffffff ffffffff ffffffff ffffffff ................ 80000270: ffffffff ffffffff ffffffff ffffffff ................ 80000280: ffffffff ffffffff ffffffff ffffffff ................ 80000290: ffffffff ffffffff ffffffff ffffffff ................ 800002a0: ffffffff ffffffff ffffffff ffffffff ................ 800002b0: ffffffff ffffffff ffffffff ffffffff ................ 800002c0: ffffffff ffffffff ffffffff ffffffff ................ 800002d0: ffffffff ffffffff ffffffff ffffffff ................ 800002e0: ffffffff ffffffff ffffffff ffffffff ................ 800002f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> 80000300: ffffffff ffffffff ffffffff ffffffff ................ 80000310: ffffffff ffffffff ffffffff ffffffff ................ 80000320: ffffffff ffffffff ffffffff ffffffff ................ 80000330: ffffffff ffffffff ffffffff ffffffff ................ 80000340: ffffffff ffffffff ffffffff ffffffff ................ 80000350: ffffffff ffffffff ffffffff ffffffff ................ 80000360: ffffffff ffffffff ffffffff ffffffff ................ 80000370: ffffffff ffffffff ffffffff ffffffff ................ 80000380: ffffffff ffffffff ffffffff ffffffff ................ 80000390: ffffffff ffffffff ffffffff ffffffff ................ 800003a0: ffffffff ffffffff ffffffff ffffffff ................ 800003b0: ffffffff ffffffff ffffffff ffffffff ................ 800003c0: ffffffff ffffffff ffffffff ffffffff ................ 800003d0: ffffffff ffffffff ffffffff ffffffff ................ 800003e0: ffffffff ffffffff ffffffff ffffffff ................ 800003f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> 80000400: ffffffff ffffffff ffffffff ffffffff ................ 80000410: ffffffff ffffffff ffffffff ffffffff ................ 80000420: ffffffff ffffffff ffffffff ffffffff ................ 80000430: ffffffff ffffffff ffffffff ffffffff ................ 80000440: ffffffff ffffffff ffffffff ffffffff ................ 80000450: ffffffff ffffffff ffffffff ffffffff ................ 80000460: ffffffff ffffffff ffffffff ffffffff ................ 80000470: ffffffff ffffffff ffffffff ffffffff ................ 80000480: ffffffff ffffffff ffffffff ffffffff ................ 80000490: ffffffff ffffffff ffffffff ffffffff ................ 800004a0: ffffffff ffffffff ffffffff ffffffff ................ 800004b0: ffffffff ffffffff ffffffff ffffffff ................ 800004c0: ffffffff ffffffff ffffffff ffffffff ................ 800004d0: ffffffff ffffffff ffffffff ffffffff ................ 800004e0: ffffffff ffffffff ffffffff ffffffff ................ 800004f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> 80000500: ffffffff ffffffff ffffffff ffffffff ................ 80000510: ffffffff ffffffff ffffffff ffffffff ................ 80000520: ffffffff ffffffff ffffffff ffffffff ................ 80000530: ffffffff ffffffff ffffffff ffffffff ................ 80000540: ffffffff ffffffff ffffffff ffffffff ................ 80000550: ffffffff ffffffff ffffffff ffffffff ................ 80000560: ffffffff ffffffff ffffffff ffffffff ................ 80000570: ffffffff ffffffff ffffffff ffffffff ................ 80000580: ffffffff ffffffff ffffffff ffffffff ................ 80000590: ffffffff ffffffff ffffffff ffffffff ................ 800005a0: ffffffff ffffffff ffffffff ffffffff ................ 800005b0: ffffffff ffffffff ffffffff ffffffff ................ 800005c0: ffffffff ffffffff ffffffff ffffffff ................ 800005d0: ffffffff ffffffff ffffffff ffffffff ................ 800005e0: ffffffff ffffffff ffffffff ffffffff ................ 800005f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> 80000600: ffffffff ffffffff ffffffff ffffffff ................ 80000610: ffffffff ffffffff ffffffff ffffffff ................ 80000620: ffffffff ffffffff ffffffff ffffffff ................ 80000630: ffffffff ffffffff ffffffff ffffffff ................ 80000640: ffffffff ffffffff ffffffff ffffffff ................ 80000650: ffffffff ffffffff ffffffff ffffffff ................ 80000660: ffffffff ffffffff ffffffff ffffffff ................ 80000670: ffffffff ffffffff ffffffff ffffffff ................ 80000680: ffffffff ffffffff ffffffff ffffffff ................ 80000690: ffffffff ffffffff ffffffff ffffffff ................ 800006a0: ffffffff ffffffff ffffffff ffffffff ................ 800006b0: ffffffff ffffffff ffffffff ffffffff ................ 800006c0: ffffffff ffffffff ffffffff ffffffff ................ 800006d0: ffffffff ffffffff ffffffff ffffffff ................ 800006e0: ffffffff ffffffff ffffffff ffffffff ................ 800006f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> 80000700: ffffffff ffffffff ffffffff ffffffff ................ 80000710: ffffffff ffffffff ffffffff ffffffff ................ 80000720: ffffffff ffffffff ffffffff ffffffff ................ 80000730: ffffffff ffffffff ffffffff ffffffff ................ 80000740: ffffffff ffffffff ffffffff ffffffff ................ 80000750: ffffffff ffffffff ffffffff ffffffff ................ 80000760: ffffffff ffffffff ffffffff ffffffff ................ 80000770: ffffffff ffffffff ffffffff ffffffff ................ 80000780: ffffffff ffffffff ffffffff ffffffff ................ 80000790: ffffffff ffffffff ffffffff ffffffff ................ 800007a0: ffffffff ffffffff ffffffff ffffffff ................ 800007b0: ffffffff ffffffff ffffffff ffffffff ................ 800007c0: ffffffff ffffffff ffffffff ffffffff ................ 800007d0: ffffffff ffffffff ffffffff ffffffff ................ 800007e0: ffffffff ffffffff ffffffff ffffffff ................ 800007f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> 80000800: 30303030 30303030 30303030 30303030 0000000000000000 80000810: 30303030 30303030 30303030 30303030 0000000000000000 80000820: 30303030 30303030 30303030 30303030 0000000000000000 80000830: 30303030 30303030 30303030 30303030 0000000000000000 80000840: 30303030 30303030 ffffffff ffffffff 00000000........ 80000850: ffffffff ffffffff ffffffff ffffffff ................ 80000860: ffffffff ffffffff ffffffff ffffffff ................ 80000870: ffffffff ffffffff ffffffff ffffffff ................ 80000880: ffffffff ffffffff ffffffff ffffffff ................ 80000890: ffffffff ffffffff ffffffff ffffffff ................ 800008a0: ffffffff ffffffff ffffffff ffffffff ................ 800008b0: ffffffff ffffffff ffffffff ffffffff ................ 800008c0: ffffffff ffffffff ffffffff ffffffff ................ 800008d0: ffffffff ffffffff ffffffff ffffffff ................ 800008e0: ffffffff ffffffff ffffffff ffffffff ................ 800008f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> md 0xb8000000 b8000000: 30303030 30303030 30303030 30303030 0000000000000000 b8000010: 30303030 30303030 30303030 30303030 0000000000000000 b8000020: 30303030 30303030 30303030 30303030 0000000000000000 b8000030: 30303030 30303030 30303030 30303030 0000000000000000 b8000040: 30303030 30303030 ffffffff ffffffff 00000000........ b8000050: ffffffff ffffffff ffffffff ffffffff ................ b8000060: ffffffff ffffffff ffffffff ffffffff ................ b8000070: ffffffff ffffffff ffffffff ffffffff ................ b8000080: ffffffff ffffffff ffffffff ffffffff ................ b8000090: ffffffff ffffffff ffffffff ffffffff ................ b80000a0: ffffffff ffffffff ffffffff ffffffff ................ b80000b0: ffffffff ffffffff ffffffff ffffffff ................ b80000c0: ffffffff ffffffff ffffffff ffffffff ................ b80000d0: ffffffff ffffffff ffffffff ffffffff ................ b80000e0: ffffffff ffffffff ffffffff ffffffff ................ b80000f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> b8000100: ffffffff ffffffff ffffffff ffffffff ................ b8000110: ffffffff ffffffff ffffffff ffffffff ................ b8000120: ffffffff ffffffff ffffffff ffffffff ................ b8000130: ffffffff ffffffff ffffffff ffffffff ................ b8000140: ffffffff ffffffff ffffffff ffffffff ................ b8000150: ffffffff ffffffff ffffffff ffffffff ................ b8000160: ffffffff ffffffff ffffffff ffffffff ................ b8000170: ffffffff ffffffff ffffffff ffffffff ................ b8000180: ffffffff ffffffff ffffffff ffffffff ................ b8000190: ffffffff ffffffff ffffffff ffffffff ................ b80001a0: ffffffff ffffffff ffffffff ffffffff ................ b80001b0: ffffffff ffffffff ffffffff ffffffff ................ b80001c0: ffffffff ffffffff ffffffff ffffffff ................ b80001d0: ffffffff ffffffff ffffffff ffffffff ................ b80001e0: ffffffff ffffffff ffffffff ffffffff ................ b80001f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> b8000200: ffffffff ffffffff ffffffff ffffffff ................ b8000210: ffffffff ffffffff ffffffff ffffffff ................ b8000220: ffffffff ffffffff ffffffff ffffffff ................ b8000230: ffffffff ffffffff ffffffff ffffffff ................ b8000240: ffffffff ffffffff ffffffff ffffffff ................ b8000250: ffffffff ffffffff ffffffff ffffffff ................ b8000260: ffffffff ffffffff ffffffff ffffffff ................ b8000270: ffffffff ffffffff ffffffff ffffffff ................ b8000280: ffffffff ffffffff ffffffff ffffffff ................ b8000290: ffffffff ffffffff ffffffff ffffffff ................ b80002a0: ffffffff ffffffff ffffffff ffffffff ................ b80002b0: ffffffff ffffffff ffffffff ffffffff ................ b80002c0: ffffffff ffffffff ffffffff ffffffff ................ b80002d0: ffffffff ffffffff ffffffff ffffffff ................ b80002e0: ffffffff ffffffff ffffffff ffffffff ................ b80002f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> b8000300: ffffffff ffffffff ffffffff ffffffff ................ b8000310: ffffffff ffffffff ffffffff ffffffff ................ b8000320: ffffffff ffffffff ffffffff ffffffff ................ b8000330: ffffffff ffffffff ffffffff ffffffff ................ b8000340: ffffffff ffffffff ffffffff ffffffff ................ b8000350: ffffffff ffffffff ffffffff ffffffff ................ b8000360: ffffffff ffffffff ffffffff ffffffff ................ b8000370: ffffffff ffffffff ffffffff ffffffff ................ b8000380: ffffffff ffffffff ffffffff ffffffff ................ b8000390: ffffffff ffffffff ffffffff ffffffff ................ b80003a0: ffffffff ffffffff ffffffff ffffffff ................ b80003b0: ffffffff ffffffff ffffffff ffffffff ................ b80003c0: ffffffff ffffffff ffffffff ffffffff ................ b80003d0: ffffffff ffffffff ffffffff ffffffff ................ b80003e0: ffffffff ffffffff ffffffff ffffffff ................ b80003f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> b8000400: ffffffff ffffffff ffffffff ffffffff ................ b8000410: ffffffff ffffffff ffffffff ffffffff ................ b8000420: ffffffff ffffffff ffffffff ffffffff ................ b8000430: ffffffff ffffffff ffffffff ffffffff ................ b8000440: ffffffff ffffffff ffffffff ffffffff ................ b8000450: ffffffff ffffffff ffffffff ffffffff ................ b8000460: ffffffff ffffffff ffffffff ffffffff ................ b8000470: ffffffff ffffffff ffffffff ffffffff ................ b8000480: ffffffff ffffffff ffffffff ffffffff ................ b8000490: ffffffff ffffffff ffffffff ffffffff ................ b80004a0: ffffffff ffffffff ffffffff ffffffff ................ b80004b0: ffffffff ffffffff ffffffff ffffffff ................ b80004c0: ffffffff ffffffff ffffffff ffffffff ................ b80004d0: ffffffff ffffffff ffffffff ffffffff ................ b80004e0: ffffffff ffffffff ffffffff ffffffff ................ b80004f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> b8000500: ffffffff ffffffff ffffffff ffffffff ................ b8000510: ffffffff ffffffff ffffffff ffffffff ................ b8000520: ffffffff ffffffff ffffffff ffffffff ................ b8000530: ffffffff ffffffff ffffffff ffffffff ................ b8000540: ffffffff ffffffff ffffffff ffffffff ................ b8000550: ffffffff ffffffff ffffffff ffffffff ................ b8000560: ffffffff ffffffff ffffffff ffffffff ................ b8000570: ffffffff ffffffff ffffffff ffffffff ................ b8000580: ffffffff ffffffff ffffffff ffffffff ................ b8000590: ffffffff ffffffff ffffffff ffffffff ................ b80005a0: ffffffff ffffffff ffffffff ffffffff ................ b80005b0: ffffffff ffffffff ffffffff ffffffff ................ b80005c0: ffffffff ffffffff ffffffff ffffffff ................ b80005d0: ffffffff ffffffff ffffffff ffffffff ................ b80005e0: ffffffff ffffffff ffffffff ffffffff ................ b80005f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> b8000600: ffffffff ffffffff ffffffff ffffffff ................ b8000610: ffffffff ffffffff ffffffff ffffffff ................ b8000620: ffffffff ffffffff ffffffff ffffffff ................ b8000630: ffffffff ffffffff ffffffff ffffffff ................ b8000640: ffffffff ffffffff ffffffff ffffffff ................ b8000650: ffffffff ffffffff ffffffff ffffffff ................ b8000660: ffffffff ffffffff ffffffff ffffffff ................ b8000670: ffffffff ffffffff ffffffff ffffffff ................ b8000680: ffffffff ffffffff ffffffff ffffffff ................ b8000690: ffffffff ffffffff ffffffff ffffffff ................ b80006a0: ffffffff ffffffff ffffffff ffffffff ................ b80006b0: ffffffff ffffffff ffffffff ffffffff ................ b80006c0: ffffffff ffffffff ffffffff ffffffff ................ b80006d0: ffffffff ffffffff ffffffff ffffffff ................ b80006e0: ffffffff ffffffff ffffffff ffffffff ................ b80006f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> b8000700: ffffffff ffffffff ffffffff ffffffff ................ b8000710: ffffffff ffffffff ffffffff ffffffff ................ b8000720: ffffffff ffffffff ffffffff ffffffff ................ b8000730: ffffffff ffffffff ffffffff ffffffff ................ b8000740: ffffffff ffffffff ffffffff ffffffff ................ b8000750: ffffffff ffffffff ffffffff ffffffff ................ b8000760: ffffffff ffffffff ffffffff ffffffff ................ b8000770: ffffffff ffffffff ffffffff ffffffff ................ b8000780: ffffffff ffffffff ffffffff ffffffff ................ b8000790: ffffffff ffffffff ffffffff ffffffff ................ b80007a0: ffffffff ffffffff ffffffff ffffffff ................ b80007b0: ffffffff ffffffff ffffffff ffffffff ................ b80007c0: ffffffff ffffffff ffffffff ffffffff ................ b80007d0: ffffffff ffffffff ffffffff ffffffff ................ b80007e0: ffffffff ffffffff ffffffff ffffffff ................ b80007f0: ffffffff ffffffff ffffffff ffffffff ................ uboot> b8000800: ffffffff ffffffff ffffffff ffffffff ................ b8000810: ffffffff ffffffff ffffffff ffffffff ................ b8000820: ffffffff ffffffff ffffffff ffffffff ................ b8000830: ffffffff ffffffff ffffffff ffffffff ................ b8000840: ffffffff ffffffff ffffffff ffffffff ................ b8000850: ffffffff ffffffff ffffffff ffffffff ................ b8000860: ffffffff ffffffff ffffffff ffffffff ................ b8000870: ffffffff ffffffff ffffffff ffffffff ................ b8000880: ffffffff ffffffff ffffffff ffffffff ................ b8000890: ffffffff ffffffff ffffffff ffffffff ................ b80008a0: ffffffff ffffffff ffffffff ffffffff ................ b80008b0: ffffffff ffffffff ffffffff ffffffff ................ b80008c0: ffffffff ffffffff ffffffff ffffffff ................ b80008d0: ffffffff ffffffff ffffffff ffffffff ................ b80008e0: ffffffff ffffffff ffffffff ffffffff ................ b80008f0: ffffffff ffffffff ffffffff ffffffff ................ uboot>