[PATCH 1/4] GPMI-NAND: Define ecc.strength

[Marek Vasut]

Dear Shawn Guo,

> So non-DT probe has the same issue?  Or this is a DT probe only issue?

I started using DT, so I'm now fixing everything to work like it used to. Damn 
this DT conversion broke about everything.

> 
> Copy linux-mtd list and Artem Bityutskiy on this.
> 
> > The ecc.strength wasn't set, resulting in the following crash:
> > [    2.550000] kernel BUG at drivers/mtd/nand/nand_base.c:3347!
> > [    2.550000] Internal error: Oops - BUG: 0 [#1] ARM
> > [    2.550000] Modules linked in:
> > [    2.550000] CPU: 0    Not tainted  (3.4.0-rc7-next-20120518-dirty
> > #1211) [    2.550000] PC is at nand_scan_tail+0x328/0x650
> > [    2.550000] LR is at nand_scan_tail+0x328/0x650
> > [    2.550000] pc : [<c020841c>]    lr : [<c020841c>]    psr: 20000013
> > [    2.550000] sp : c7443ea8  ip : c7448000  fp : c043dc70
> > [    2.550000] r10: 00000000  r9 : c059dd20  r8 : c7526300
> > [    2.550000] r7 : 00000001  r6 : c7479c08  r5 : c7526300  r4 : c7526098
> > [    2.550000] r3 : c7448000  r2 : 00000000  r1 : 00000001  r0 : 00000034
> > [    2.550000] Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM 
> > Segment kernel [    2.550000] Control: 0005317f  Table: 40004000  DAC:
> > 00000017 [    2.550000] Process swapper (pid: 1, stack limit =
> > 0xc7442270) [    2.550000] Stack: (0xc7443ea8 to 0xc7444000)
> > [    2.550000] 3ea0:                   c7526000 00000000 c7479c08
> > c02f68e0 c03d50ec c7526000 [    2.550000] 3ec0: c747c6e0 00000000
> > c0ae7720 00000004 00000000 00000000 c7479c08 c0ae7720 [    2.550000]
> > 3ee0: c7479c3c c0593e20 c7572200 c01f6618 c01f6604 c01f55b0 c7479c08
> > c0593e20 [    2.550000] 3f00: c7479c3c c059dd20 c7572200 c01f57cc
> > 00000000 c0593e20 c01f5738 c01f3d40 [    2.550000] 3f20: c74038a8
> > c74767d0 c0593e20 c04475ec c05901b8 c01f4e18 c03d50e0 c019d438 [   
> > 2.550000] 3f40: c7403800 c0593e20 c04475ec 00000000 c059dd20 c04475f8
> > c7442000 c01f5a70 [    2.550000] 3f60: 00000000 c044e98c c04475ec
> > 00000000 c059dd20 c04475f8 c7442000 c043dc7c [    2.550000] 3f80:
> > c044e98c c0008824 c03d6c30 c040c4e4 00000006 00000006 c03b0ce4 c0bf54e0
> > [    2.550000] 3fa0: c044e98c c04475ec 00000006 c04475f8 0000004c
> > c042a21c 00000000 c042a8b8 [    2.550000] 3fc0: 00000006 00000006
> > c042a21c 00000000 00000000 00000000 00000000 c042a7bc [    2.550000]
> > 3fe0: c000fab4 00000013 00000000 00000000 00000000 c000fab4 efbbfaa5
> > eaeafefe [    2.550000] [<c020841c>] (nand_scan_tail+0x328/0x650) from
> > [<c02f68e0>] (gpmi_nand_probe+0x43c/0x5a4) [    2.550000] [<c02f68e0>]
> > (gpmi_nand_probe+0x43c/0x5a4) from [<c01f6618>]
> > (platform_drv_probe+0x14/0x18) [    2.550000] [<c01f6618>]
> > (platform_drv_probe+0x14/0x18) from [<c01f55b0>]
> > (driver_probe_device+0x74/0x1fc) [    2.550000] [<c01f55b0>]
> > (driver_probe_device+0x74/0x1fc) from [<c01f57cc>]
> > (__driver_attach+0x94/0x98) [    2.550000] [<c01f57cc>]
> > (__driver_attach+0x94/0x98) from [<c01f3d40>]
> > (bus_for_each_dev+0x50/0x80) [    2.550000] [<c01f3d40>]
> > (bus_for_each_dev+0x50/0x80) from [<c01f4e18>]
> > (bus_add_driver+0x188/0x25c) [    2.550000] [<c01f4e18>]
> > (bus_add_driver+0x188/0x25c) from [<c01f5a70>]
> > (driver_register+0x78/0x138) [    2.550000] [<c01f5a70>]
> > (driver_register+0x78/0x138) from [<c043dc7c>] (gpmi_nand_init+0xc/0x30)
> > [    2.550000] [<c043dc7c>] (gpmi_nand_init+0xc/0x30) from [<c0008824>]
> > (do_one_initcall+0x108/0x17c) [    2.550000] [<c0008824>]
> > (do_one_initcall+0x108/0x17c) from [<c042a8b8>] (kernel_init+0xfc/0x1bc)
> > [    2.550000] [<c042a8b8>] (kernel_init+0xfc/0x1bc) from [<c000fab4>]
> > (kernel_thread_exit+0x0/0x8) [    2.550000] Code: e3530000 1affff76
> > e59f02d0 eb03c16a (e7f001f2) [    2.830000] ---[ end trace
> > 3f05d4c0039432f1 ]---
> > [    2.840000] Kernel panic - not syncing: Attempted to kill init!
> > exitcode=0x0000000b
> > 
> > Signed-off-by: Marek Vasut <marex at denx.de>
> > Cc: Huang Shijie <b32955 at freescale.com>
> > Cc: Shawn Guo <shawn.guo at linaro.org>
> > Cc: Fabio Estevam <fabio.estevam at freescale.com>
> > ---
> > 
> >  drivers/mtd/nand/gpmi-nand/gpmi-nand.c |    4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
> > b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c index 9b4c109..f5f3d761 100644
> > --- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
> > +++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
> > @@ -1436,6 +1436,9 @@ static int gpmi_pre_bbt_scan(struct gpmi_nand_data 
> > *this)
> > 
> >  	if (ret)
> >  	
> >  		return ret;
> > 
> > +	/* Adjust the ECC strength according to the chip. */
> > +	this->nand.ecc.strength = this->bch_geometry.ecc_strength;
> > +
> > 
> >  	/* NAND boot init, depends on the gpmi_set_geometry(). */
> >  	return nand_boot_init(this);
> >  
> >  }
> > 
> > @@ -1494,6 +1497,7 @@ static int __devinit gpmi_nfc_init(struct
> > gpmi_nand_data *this)
> > 
> >  	chip->options		|= NAND_NO_SUBPAGE_WRITE;
> >  	chip->ecc.mode		= NAND_ECC_HW;
> >  	chip->ecc.size		= 1;
> > 
> > +	chip->ecc.strength	= 8;
> > 
> >  	chip->ecc.layout	= &gpmi_hw_ecclayout;
> >  	
> >  	/* Allocate a temporary DMA buffer for reading ID in the nand_scan() */

Best regards,
Marek Vasut