[PATCH 1/2] mtd/nand: fixup for fmr initialization of Freescale NAND controller

[PATCH 1/2] mtd/nand: fixup for fmr initialization of Freescale NAND controller

[Shengzhou Liu]

There was a bug for fmr initialization, which lead to  fmr was always 0x100
in fsl_elbc_chip_init() and caused FCM command timeout before calling
fsl_elbc_chip_init_tail().

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
---
 drivers/mtd/nand/fsl_elbc_nand.c |    8 +++-----
 1 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c
index eedd8ee..742bf73 100644
--- a/drivers/mtd/nand/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/fsl_elbc_nand.c
@@ -659,9 +659,7 @@ static int fsl_elbc_chip_init_tail(struct mtd_info *mtd)
 	if (chip->pagemask & 0xff000000)
 		al++;
 
-	/* add to ECCM mode set in fsl_elbc_init */
-	priv->fmr |= (12 << FMR_CWTO_SHIFT) |  /* Timeout > 12 ms */
-	             (al << FMR_AL_SHIFT);
+	priv->fmr |= al << FMR_AL_SHIFT;
 
 	dev_dbg(priv->dev, "fsl_elbc_init: nand->numchips = %d\n",
 	        chip->numchips);
@@ -764,8 +762,8 @@ static int fsl_elbc_chip_init(struct fsl_elbc_mtd *priv)
 	priv->mtd.priv = chip;
 	priv->mtd.owner = THIS_MODULE;
 
-	/* Set the ECCM according to the settings in bootloader.*/
-	priv->fmr = in_be32(&lbc->fmr) & FMR_ECCM;
+	/* Set fmr according to the settings in bootloader.*/
+	priv->fmr = in_be32(&lbc->fmr);
 
 	/* fill in nand_chip structure */
 	/* set up function call table */
-- 
1.6.4

[PATCH 2/2] mtd/nand: Add ONFI support for FSL NAND controller

[Shengzhou Liu]

- fix NAND_CMD_READID command for ONFI detect.
- add NAND_CMD_PARAM command to read the ONFI parameter page.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
---
 drivers/mtd/nand/fsl_elbc_nand.c |   19 ++++++++++++-------
 1 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c
index 742bf73..08a3aba 100644
--- a/drivers/mtd/nand/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/fsl_elbc_nand.c
@@ -349,19 +349,24 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
 		fsl_elbc_run_command(mtd);
 		return;
 
-	/* READID must read all 5 possible bytes while CEB is active */
 	case NAND_CMD_READID:
-		dev_vdbg(priv->dev, "fsl_elbc_cmdfunc: NAND_CMD_READID.\n");
+	case NAND_CMD_PARAM:
+		dev_vdbg(priv->dev, "fsl_elbc_cmdfunc: NAND_CMD %x\n", command);
 
 		out_be32(&lbc->fir, (FIR_OP_CM0 << FIR_OP0_SHIFT) |
 		                    (FIR_OP_UA  << FIR_OP1_SHIFT) |
 		                    (FIR_OP_RBW << FIR_OP2_SHIFT));
-		out_be32(&lbc->fcr, NAND_CMD_READID << FCR_CMD0_SHIFT);
-		/* nand_get_flash_type() reads 8 bytes of entire ID string */
-		out_be32(&lbc->fbcr, 8);
-		elbc_fcm_ctrl->read_bytes = 8;
+		out_be32(&lbc->fcr, command << FCR_CMD0_SHIFT);
+		/* reads 8 bytes of entire ID string */
+		if (NAND_CMD_READID == command) {
+			out_be32(&lbc->fbcr, 8);
+			elbc_fcm_ctrl->read_bytes = 8;
+		} else {
+			out_be32(&lbc->fbcr, 256);
+			elbc_fcm_ctrl->read_bytes = 256;
+		}
 		elbc_fcm_ctrl->use_mdr = 1;
-		elbc_fcm_ctrl->mdr = 0;
+		elbc_fcm_ctrl->mdr = column;
 
 		set_addr(mtd, 0, 0, 0);
 		fsl_elbc_run_command(mtd);
-- 
1.6.4

Re: [PATCH 1/2] mtd/nand: fixup for fmr initialization of Freescale NAND controller

[Scott Wood]

On 12/05/2011 04:54 AM, Shengzhou Liu wrote:
> There was a bug for fmr initialization, which lead to  fmr was always 0x100
> in fsl_elbc_chip_init() and caused FCM command timeout before calling
> fsl_elbc_chip_init_tail().
> 
> Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
> ---
>  drivers/mtd/nand/fsl_elbc_nand.c |    8 +++-----
>  1 files changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c
> index eedd8ee..742bf73 100644
> --- a/drivers/mtd/nand/fsl_elbc_nand.c
> +++ b/drivers/mtd/nand/fsl_elbc_nand.c
> @@ -659,9 +659,7 @@ static int fsl_elbc_chip_init_tail(struct mtd_info *mtd)
>  	if (chip->pagemask & 0xff000000)
>  		al++;
>  
> -	/* add to ECCM mode set in fsl_elbc_init */
> -	priv->fmr |= (12 << FMR_CWTO_SHIFT) |  /* Timeout > 12 ms */
> -	             (al << FMR_AL_SHIFT);
> +	priv->fmr |= al << FMR_AL_SHIFT;
>  
>  	dev_dbg(priv->dev, "fsl_elbc_init: nand->numchips = %d\n",
>  	        chip->numchips);
> @@ -764,8 +762,8 @@ static int fsl_elbc_chip_init(struct fsl_elbc_mtd *priv)
>  	priv->mtd.priv = chip;
>  	priv->mtd.owner = THIS_MODULE;
>  
> -	/* Set the ECCM according to the settings in bootloader.*/
> -	priv->fmr = in_be32(&lbc->fmr) & FMR_ECCM;
> +	/* Set fmr according to the settings in bootloader.*/
> +	priv->fmr = in_be32(&lbc->fmr);
>  
>  	/* fill in nand_chip structure */
>  	/* set up function call table */

We shouldn't be relying on the bootloader to provide a sane value here
-- the bootloader may not have used/initialized NAND at all.

It's sort of OK for ECCM, since unless you're trying to match an
externally programmed flash, or the bootloader uses the flash, all we
really care about is that the value stay consistent.  The timeout, OTOH,
must not be set too low or things won't work.

We should just set a value that we believe to be high enough for all uses.

-Scott

[PATCH 1/2] mtd/nand: fixup for fmr initialization of Freescale NAND controller

[Shengzhou Liu]

There was a bug for fmr initialization, which lead to  fmr was always 0x100
in fsl_elbc_chip_init() and caused FCM command timeout before calling
fsl_elbc_chip_init_tail(), now we initialize CWTO to maximum timeout value
and not relying on the setting of bootloader.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
---
v3: add more descriptions.
v2: make fmr not relying on the setting of bootloader.

 drivers/mtd/nand/fsl_elbc_nand.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c
index eedd8ee..4f405a0 100644
--- a/drivers/mtd/nand/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/fsl_elbc_nand.c
@@ -659,9 +659,7 @@ static int fsl_elbc_chip_init_tail(struct mtd_info *mtd)
 	if (chip->pagemask & 0xff000000)
 		al++;
 
-	/* add to ECCM mode set in fsl_elbc_init */
-	priv->fmr |= (12 << FMR_CWTO_SHIFT) |  /* Timeout > 12 ms */
-	             (al << FMR_AL_SHIFT);
+	priv->fmr |= al << FMR_AL_SHIFT;
 
 	dev_dbg(priv->dev, "fsl_elbc_init: nand->numchips = %d\n",
 	        chip->numchips);
@@ -764,8 +762,10 @@ static int fsl_elbc_chip_init(struct fsl_elbc_mtd *priv)
 	priv->mtd.priv = chip;
 	priv->mtd.owner = THIS_MODULE;
 
-	/* Set the ECCM according to the settings in bootloader.*/
-	priv->fmr = in_be32(&lbc->fmr) & FMR_ECCM;
+	/* set timeout to maximum */
+	priv->fmr = 15 << FMR_CWTO_SHIFT;
+	if (in_be32(&lbc->bank[priv->bank].or) & OR_FCM_PGS)
+		priv->fmr |= FMR_ECCM;
 
 	/* fill in nand_chip structure */
 	/* set up function call table */
-- 
1.6.4

Re: [PATCH 1/2] mtd/nand: fixup for fmr initialization of Freescale NAND controller

[Artem Bityutskiy]

[-- Attachment #1: Type: text/plain, Size: 484 bytes --]

On Mon, 2011-12-12 at 17:40 +0800, Shengzhou Liu wrote:
> There was a bug for fmr initialization, which lead to  fmr was always 0x100
> in fsl_elbc_chip_init() and caused FCM command timeout before calling
> fsl_elbc_chip_init_tail(), now we initialize CWTO to maximum timeout value
> and not relying on the setting of bootloader.
> 
> Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>

Pushed both to l2-mtd-2.6.git, thanks!

-- 
Best Regards,
Artem Bityutskiy

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 836 bytes --]

RE: [PATCH 1/2] mtd/nand: fixup for fmr initialization of Freescale NAND controller

[Liu Shengzhou-B36685]
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RE: [PATCH 1/2] mtd/nand: fixup for fmr initialization of Freescale NAND controller

[Artem Bityutskiy]

[-- Attachment #1: Type: text/plain, Size: 1370 bytes --]

On Tue, 2011-12-20 at 06:40 +0000, Liu Shengzhou-B36685 wrote:
> > -----Original Message-----
> > From: Artem Bityutskiy [mailto:dedekind1@gmail.com]
> > Sent: Saturday, December 17, 2011 10:45 PM
> > To: Liu Shengzhou-B36685
> > Cc: linuxppc-dev@lists.ozlabs.org; Wood Scott-B07421;
> > dwmw2@infradead.org; Gala Kumar-B11780; linux-mtd@lists.infradead.org
> > Subject: Re: [PATCH 1/2] mtd/nand: fixup for fmr initialization of
> > Freescale NAND controller
> > 
> > On Mon, 2011-12-12 at 17:40 +0800, Shengzhou Liu wrote:
> > > There was a bug for fmr initialization, which lead to  fmr was always
> > > 0x100 in fsl_elbc_chip_init() and caused FCM command timeout before
> > > calling fsl_elbc_chip_init_tail(), now we initialize CWTO to maximum
> > > timeout value and not relying on the setting of bootloader.
> > >
> > > Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
> > 
> > Pushed both to l2-mtd-2.6.git, thanks!
> > 
> > --
> > Best Regards,
> > Artem Bityutskiy
> 
> I noted it had been applied in linux-next.git tree.
> Does it still need to l2-mtd-2.6.git? 
> Thanks.

It is in linux-next because it is pulled there from l2-mtd-2.6.git.
Thanks for head up, but no, it should stay in the l2-mtd-2.6.git.
David Woodhouse then should take care of merging the l2 tree upstream.

-- 
Best Regards,
Artem Bityutskiy

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 836 bytes --]