[Arm-netbook] allwinner-v3.0-android-v2 boot up failure(SDCARD)

[Adam Jiang]

2012/6/5 Rosimildo DaSilva <rosimildo at gmail.com>:
> You MUST pass these options to the kernel.
>
> extra=rootfstype=ext4 rootwait

Thank you, Rosimildo. It works for me.

I have this patch on sun4i branch

diff --git a/include/configs/sun4i.h b/include/configs/sun4i.h
index 156dc10..2d997a8 100644
--- a/include/configs/sun4i.h
+++ b/include/configs/sun4i.h
@@ -161,7 +161,7 @@
        "console=ttyS0,115200\0" \
        "root=/dev/mmcblk0p2\0" \
        "panic=10\0" \
-       "extra=\0" \
+       "extra=rootfstype=ext4 rootwait\0" \
        "init=/init\0" \
        "loglevel=8\0" \
        "setargs=setenv bootargs console=${console} root=${root}" \

/Adam

>
> Rosimildo.
>
> On Mon, Jun 4, 2012 at 11:06 AM, Adam Jiang <jiang.adam at gmail.com> wrote:
>>
>> Hi, folks
>>
>> Finally, I got my A2000 board run with allwinner-v3.0-android-v2.
>> However, it failed before mount rootfs.
>>
>> [    4.400000] [mmc_pm]: No sdio card, please check your config !!
>> [    4.430000] Registering SWP/SWPB emulation handler
>> [    4.440000] registered taskstats version 1
>> [    4.440000] regulator_init_complete: axp20_buck3: incomplete
>> constraints, leaving on
>> [    4.460000] regulator_init_complete: axp20_buck2: incomplete
>> constraints, leaving on
>> [    4.470000] regulator_init_complete: axp20_ldo4: incomplete
>> constraints, leaving on
>> [    4.490000] regulator_init_complete: axp20_ldo3: incomplete
>> constraints, leaving on
>> [    4.500000] regulator_init_complete: axp20_ldo2: incomplete
>> constraints, leaving on
>> [    4.520000] regulator_init_complete: axp20_ldo1: incomplete
>> constraints, leaving on
>> [    4.530000] sunxi-rtc sunxi-rtc: sunxi_rtc_gettime
>> [    4.540000] sunxi-rtc sunxi-rtc: read time 2010-1-1 0:0:9
>> [    4.550000] sunxi-rtc sunxi-rtc: setting system clock to 2010-01-01
>> 00:00:09 UTC (1262304009)
>> [    4.570000] VFS: Cannot open root device "mmcblk0p2" or
>> unknown-block(0,0)
>> [    4.580000] Please append a correct "root=" boot option; here are
>> the available partitions:
>> [    4.670000] Kernel panic - not syncing: VFS: Unable to mount root
>> fs on unknown-block(0,0)
>> [    4.690000] [<c003c1fc>] (dump_backtrace+0x0/0x110) from
>> [<c05820dc>] (dump_stack+0x18/0x1c)
>> [    4.710000] [<c05820c4>] (dump_stack+0x0/0x1c) from [<c0582230>]
>> (panic+0x74/0x188)
>> [    4.730000] [<c05821bc>] (panic+0x0/0x188) from [<c0008ef8>]
>> (mount_block_root+0x214/0x2b8)
>> [    4.750000] [<c0008ce4>] (mount_block_root+0x0/0x2b8) from
>> [<c00090ec>] (mount_root+0x64/0x68)
>> [    4.770000] [<c0009088>] (mount_root+0x0/0x68) from [<c0009290>]
>> (prepare_namespace+0x1a0/0x1e8)
>> [    4.790000] [<c00090f0>] (prepare_namespace+0x0/0x1e8) from
>> [<c0008b84>] (kernel_init+0x154/0x158)
>> [    4.820000] [<c0008a30>] (kernel_init+0x0/0x158) from [<c006c1d0>]
>> (do_exit+0x0/0x748)
>>
>> It seems this problem is about sdmmc configuration in script.bin which
>> is generated by script.fex. I got the fex file by bin2fex utility from
>> the stock binary. Though I can get some sections in fex file about mmc
>> , it is very hard to guess the details about these values. Anybody
>> knows where could I get documentation about fex file? Anyone
>> experienced SD card boot could shed some light on the following
>> section? Thanks.
>>
>> [mmc0_para]
>> sdc_used        = 1
>> sdc_detmode     = 1
>> bus_width       = 4
>> sdc_d1  = port:PF00<2><1><2><default>
>> sdc_d0  = port:PF01<2><1><2><default>
>> sdc_clk = port:PF02<2><1><2><default>
>> sdc_cmd = port:PF03<2><1><2><default>
>> sdc_d3  = port:PF04<2><1><2><default>
>> sdc_d2  = port:PF05<2><1><2><default>
>> sdc_det = port:PH01<0><1><default><default>
>> sdc_use_wp      = 0
>> sdc_wp  =
>>
>> [mmc1_para]
>> sdc_used        = 1
>> sdc_detmode     = 1
>> bus_width       = 4
>> sdc_cmd = port:PH22<5><1><2><default>
>> sdc_clk = port:PH23<5><1><2><default>
>> sdc_d0  = port:PH24<5><1><2><default>
>> sdc_d1  = port:PH25<5><1><2><default>
>> sdc_d2  = port:PH26<5><1><2><default>
>> sdc_d3  = port:PH27<5><1><2><default>
>> sdc_det = port:PH02<0><1><default><default>
>> sdc_use_wp      = 0
>> sdc_wp  =
>>
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