MTK Smart Device Gen1 NAND Driver - Testing on MT7623
John Crispin
blogic at openwrt.org
Tue Apr 26 23:36:21 PDT 2016
Hi Jorge,
I have been testing version 3 of the driver on the MT7623 with limited
success and was hoping you could shed some light on the problems I am seeing
the driver loads
[ 1.924633] nand: device found, Manufacturer ID: 0xef, Chip ID: 0xda
[ 1.930941] nand: Unknown W29N02GV
[ 1.934386] nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048,
OOB size: 64
[ 1.942869] Bad block table not found for chip 0
[ 1.948320] Bad block table not found for chip 0
[ 1.952926] Scanning device for bad blocks
[ 2.411339] Bad eraseblock 2046 at 0x00000ffc0000
[ 2.416251] Bad eraseblock 2047 at 0x00000ffe0000
[ 2.422096] Bad block table written to 0x00000ffa0000, version 0x01
[ 2.429426] Bad block table written to 0x00000ff80000, version 0x01
[ 2.435966] 6 ofpart partitions found on MTD device mtk-nand
[ 2.441578] Creating 6 MTD partitions on "mtk-nand":
[ 2.446523] 0x000000000000-0x000000400000 : "pl"
[ 2.452256] 0x0000000c0000-0x000000100000 : "uboot-env"
[ 2.458381] 0x000000100000-0x000000140000 : "factory"
[ 2.464300] 0x000000140000-0x000002140000 : "kernel"
[ 2.470419] 0x000002140000-0x000004140000 : "recovery"
[ 2.476780] 0x000004140000-0x000005140000 : "rootfs"
but when i try to access the mtd devices i get an error
root at OpenWrt:/# hexdump -C /dev/mtd1
[ 165.752134] mtk-ecc 1100e000.ecc: decoder NOT idle
[ 166.251999] mtk-nand 1100d000.nfi: read ahb/dma done timeout
[ 166.757624] mtk-nand 1100d000.nfi: subpage done timeout
[ 167.262834] mtk-ecc 1100e000.ecc: decoder NOT idle
hexdump: /dev/mtd1: I/O error
the devicetree i am using is this
&nandc {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&nand_pins_default>;
nand at 0 {
reg = <0>;
spare_per_sector = <64>;
nand-on-flash-bbt;
nand-ecc-mode = "hw";
nand-ecc-strength = <12>;
nand-ecc-step-size = <1024>;
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
partition at C0000 {
label = "uboot-env";
reg = <0xC0000 0x40000>;
};
partition at 100000 {
label = "factory";
reg = <0x100000 0x40000>;
};
partition at 140000 {
label = "kernel";
reg = <0x140000 0x2000000>;
};
partition at 2140000 {
label = "recovery";
reg = <0x2140000 0x2000000>;
};
partition at 4140000 {
label = "rootfs";
reg = <0x4140000 0x1000000>;
};
};
};
};
&bch {
status = "okay";
};
and the relevant part of the bootlog from the SDK kernel is this one
[ 7.387419] (3)[1:swapper/0]flash_number: 0xb ,then print the flashtable
[ 7.394249] (3)[1:swapper/0]gen_FlashTable_p[0].devciename: W29N01GV
[ 7.400541] (3)[1:swapper/0]gen_FlashTable_p[1].devciename: W29N02GV
[ 7.406890] (3)[1:swapper/0]gen_FlashTable_p[2].devciename: W29N04GV
[ 7.413276] (3)[1:swapper/0]gen_FlashTable_p[3].devciename: MX30LF1G18AC
[ 7.419985] (3)[1:swapper/0]gen_FlashTable_p[4].devciename: MX30LF2G18AC
[ 7.426716] (3)[1:swapper/0]gen_FlashTable_p[5].devciename: MX30LF4G18AC
[ 7.433436] (3)[1:swapper/0]gen_FlashTable_p[6].devciename: MX60LF8G18AC
[ 7.440145] (3)[1:swapper/0]gen_FlashTable_p[7].devciename:
S34ML01G200TFI
[ 7.447048] (3)[1:swapper/0]gen_FlashTable_p[8].devciename:
S34ML02G200TFI
[ 7.453940] (3)[1:swapper/0]gen_FlashTable_p[9].devciename:
S34ML04G200TFI
[ 7.460833] (3)[1:swapper/0]gen_FlashTable_p[10].devciename:
S34ML08G201TFI
[ 7.467797]Recognize NAND: ID [ef da 90 95 4 ], Device Name
[W29N02GV], Page Size [2048]B Spare Size [64]B Total Size [256]MB
[ 7.479008] (3)[1:swapper/0]Nand cs[1] not support(0,0)
[ 7.484204] (3)[1:swapper/0][NAND]EFUSE RANDOM CFG is OFF
[ 7.489511] (3)[1:swapper/0]SLC NAND
[ 7.493137] (3)[1:swapper/0][NAND]select ecc bit:12, sparesize :64
[ 7.499175] (3)[1:swapper/0][NSS] idx: 0, buf: 0xC25F7000
[ 7.504525] (3)[1:swapper/0][NSS] idx: 1, buf: 0xC4541000
[ 7.509849] (3)[1:swapper/0][NSS] idx: 2, buf: 0xC4542000
[ 7.515199] (3)[1:swapper/0][NSS] idx: 3, buf: 0xC4543000
[ 7.520550] (3)[1:swapper/0][NSS] Init OK, cnt: 4, aligned size: 64
[ 7.526739] (3)[1:swapper/0][Bean]nand_chip->chipsize : 256MB
[ 7.532429] (3)[1:swapper/0][bayi]0x78
[ 7.536207] (3)[1:swapper/0][mtk_nand_interface_config] legacy interface
[ 7.542938] (3)[1:swapper/0]Init bmt table, size: 120
[ 7.547924] (3)[1:swapper/0]mtd_bmt: c4540a40, nand_chip_bmt: c4540800
[ 7.554395] (3)[1:swapper/0]bmt count: 120, system count: 1928
[ 7.560161] (3)[1:swapper/0][load_bmt_data]: begin to search BMT from
block 0x7ff
[ 7.568168] (3)[1:swapper/0]Bad block detected at 0x1ffc0, oob_buf[0]
is 0xaa
[ 7.575096] (3)[1:swapper/0]Skip bad block: 2047
[ 7.580213] (3)[1:swapper/0]Bad block detected at 0x1ff80, oob_buf[0]
is 0x0
[ 7.587052] (3)[1:swapper/0]Skip bad block: 2046
[ 7.593258] (3)[1:swapper/0]Match bmt signature @ block: 0x7fd
[ 7.598883] (3)[1:swapper/0]BMT Checksum is: 0x1
[ 7.603458] (3)[1:swapper/0]Valid BMT, version v1
[ 7.608098] (3)[1:swapper/0]bmt found at block: 2045, mapped block: 0
[ 7.614484] (3)[1:swapper/0]Load bmt data success @ block 0x7fd
[ 7.620331] (3)[1:swapper/0]BMT v1. total 0 mapping:
[ 7.626402] (3)[1:swapper/0]partition PRELOADER Preloader size 0
[ 7.632213] (3)[1:swapper/0]partition UBOOT Uboot size 40000
[ 7.637795] (3)[1:swapper/0]partition CONFIG Config size c0000
[ 7.643580] (3)[1:swapper/0]partition FACTORY Factory size 100000
[ 7.649599] (3)[1:swapper/0]partition BOOTIMG Bootimg size 140000
[ 7.655640] (3)[1:swapper/0]partition RECOVERY Recovery size 2140000
[ 7.661929] (3)[1:swapper/0]partition ROOTFS Rootfs size 4140000
[ 7.667863] (3)[1:swapper/0]partition USRDATA Usrdata size 5140000
[ 7.674651] (3)[1:swapper/0]Creating 8 MTD partitions on "MTK-Nand":
[ 7.680817] (3)[1:swapper/0]0x000000000000-0x000000040000 : "Preloader"
[ 7.689127] (3)[1:swapper/0]0x000000040000-0x0000000c0000 : "Uboot"
[ 7.698060] (3)[1:swapper/0]0x0000000c0000-0x000000100000 : "Config"
[ 7.705942] (3)[1:swapper/0]0x000000100000-0x000000140000 : "Factory"
[ 7.713858] (3)[1:swapper/0]0x000000140000-0x000002140000 : "boot"
[ 7.867105] (3)[1:swapper/0]0x000002140000-0x000004140000 : "Recovery"
[ 8.022024] (3)[1:swapper/0]0x000004140000-0x000005140000 : "Rootfs"
[ 8.102713] (3)[1:swapper/0]0x000005140000-0x00000f0c0000 : "userdata"
[ 8.847181] (3)[1:swapper/0][mtk_nand] probe successfully!
looking at the code, it seems that the ecc core is not idle, and this is
also what the error messges tell us. I compared the registers between
the driver and those present on the MT7623 and they are identical by the
look of things. I am told by MTK that the core is identical to MT2701 in
regards to NAND, even IRQ, clocks, pins are the same.
i had to fiddle with nand-ecc-strength and spare_per_sector to make the
driver load and am not sure if the changes are correct and might be
causing these issues.
do you have any idea what might be wrong ?
John
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