[PATCHv2 0/2] ARM: cfa10036: Store the barebox environment on the MMC

[PATCHv2 0/2] ARM: cfa10036: Store the barebox environment on the MMC

[Maxime Ripard]

Hi,

The cfa-10036 comes only with a SD slot, so there was previously no way to
store in a persistent way the environment we could have modified other than
by modifying the code source itself.

These two patches register a new partition on the SD card to store that
environment, and update the default environment to reflect these changes.

Thanks,
Maxime

Changes from v1:
  - Make use of the new common envfs_register_partition function

Maxime Ripard (2):
  cfa-10036: Use the second MMC partition to store the environment
  cfa10036: Update the environment

 arch/arm/boards/crystalfontz-cfa10036/cfa10036.c         |    8 +++++++-
 arch/arm/boards/crystalfontz-cfa10036/env/boot/mmc-ext3  |    6 +++---
 arch/arm/boards/crystalfontz-cfa10036/env/init/automount |    4 ++--
 3 files changed, 12 insertions(+), 6 deletions(-)

-- 
1.7.10.4


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[PATCH 1/2] cfa-10036: Use the second MMC partition to store the environment

[Maxime Ripard]

Since the only storage medium on the cfa-10036 is the MMC card, we need
to have a registered environment partition on it if we want to be able
to modify at runtime.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---
 arch/arm/boards/crystalfontz-cfa10036/cfa10036.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
index b59dbab..1bc20cf 100644
--- a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
+++ b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
@@ -17,6 +17,7 @@
 
 #include <common.h>
 #include <environment.h>
+#include <envfs.h>
 #include <errno.h>
 #include <fec.h>
 #include <gpio.h>
@@ -99,7 +100,7 @@ mem_initcall(cfa10036_mem_init);
 
 static int cfa10036_devices_init(void)
 {
-	int i;
+	int i, ret;
 
 	/* initizalize muxing */
 	for (i = 0; i < ARRAY_SIZE(cfa10036_pads); i++)
@@ -124,6 +125,11 @@ static int cfa10036_devices_init(void)
 
 	cfa10036_detect_hw();
 
+	ret = envfs_register_partition("disk0", 1);
+	if (ret != 0)
+		printf("Cannot create the 'env0' persistent "
+			 "environment storage (%d)\n", ret);
+
 	return 0;
 }
 device_initcall(cfa10036_devices_init);
-- 
1.7.10.4


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[PATCH 2/2] cfa10036: Update the environment

[Maxime Ripard]

Since we added a new partition in the board, the partitions number of
the boot and rootfs partition have changed as well.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---
 arch/arm/boards/crystalfontz-cfa10036/env/boot/mmc-ext3  |    6 +++---
 arch/arm/boards/crystalfontz-cfa10036/env/init/automount |    4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/arm/boards/crystalfontz-cfa10036/env/boot/mmc-ext3 b/arch/arm/boards/crystalfontz-cfa10036/env/boot/mmc-ext3
index 5e508f9..439d174 100644
--- a/arch/arm/boards/crystalfontz-cfa10036/env/boot/mmc-ext3
+++ b/arch/arm/boards/crystalfontz-cfa10036/env/boot/mmc-ext3
@@ -5,6 +5,6 @@ if [ "$1" = menu ]; then
 	exit
 fi
 
-global.bootm.image="/mnt/disk0.1/zImage-${global.hostname}"
-global.bootm.oftree="/mnt/disk0.1/oftree-${global.board.variant}"
-global.linux.bootargs.dyn.root="root=/dev/mmcblk0p3 rootfstype=ext3 rootwait"
+global.bootm.image="/mnt/disk0.2/zImage-${global.hostname}"
+global.bootm.oftree="/mnt/disk0.2/oftree-${global.board.variant}"
+global.linux.bootargs.dyn.root="root=/dev/mmcblk0p4 rootfstype=ext3 rootwait"
diff --git a/arch/arm/boards/crystalfontz-cfa10036/env/init/automount b/arch/arm/boards/crystalfontz-cfa10036/env/init/automount
index 668775d..8fdca7c 100644
--- a/arch/arm/boards/crystalfontz-cfa10036/env/init/automount
+++ b/arch/arm/boards/crystalfontz-cfa10036/env/init/automount
@@ -5,5 +5,5 @@ if [ "$1" = menu ]; then
 	exit
 fi
 
-mkdir -p /mnt/disk0.1
-automount -d /mnt/disk0.1 '[ -e /dev/disk0.1 ] && mount /dev/disk0.1 /mnt/disk0.1'
+mkdir -p /mnt/disk0.2
+automount -d /mnt/disk0.2 '[ -e /dev/disk0.2 ] && mount /dev/disk0.2 /mnt/disk0.2'
-- 
1.7.10.4


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Re: [PATCHv2 0/2] ARM: cfa10036: Store the barebox environment on the MMC

[Sascha Hauer]

On Tue, Feb 26, 2013 at 05:50:19PM +0100, Maxime Ripard wrote:
> Hi,
> 
> The cfa-10036 comes only with a SD slot, so there was previously no way to
> store in a persistent way the environment we could have modified other than
> by modifying the code source itself.
> 
> These two patches register a new partition on the SD card to store that
> environment, and update the default environment to reflect these changes.
> 
> Thanks,
> Maxime

Applied, thanks

Sascha

> 
> Changes from v1:
>   - Make use of the new common envfs_register_partition function
> 
> Maxime Ripard (2):
>   cfa-10036: Use the second MMC partition to store the environment
>   cfa10036: Update the environment
> 
>  arch/arm/boards/crystalfontz-cfa10036/cfa10036.c         |    8 +++++++-
>  arch/arm/boards/crystalfontz-cfa10036/env/boot/mmc-ext3  |    6 +++---
>  arch/arm/boards/crystalfontz-cfa10036/env/init/automount |    4 ++--
>  3 files changed, 12 insertions(+), 6 deletions(-)
> 
> -- 
> 1.7.10.4
> 
> 
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> 

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Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
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Re: [PATCH 1/2] cfa-10036: Use the second MMC partition to store the environment

[Eric Bénard]

Le Thu, 14 Feb 2013 11:10:54 +0100,
Maxime Ripard <maxime.ripard@free-electrons.com> a écrit :

> Hi Juergen,
> 
> Le 14/02/2013 09:16, Juergen Beisert a écrit :
> > Maxime Ripard wrote:
> >> Since the only storage medium on the cfa-10036 is the MMC card, we need
> >> to have a registered environment partition on it if we want to be able
> >> to modify at runtime.
> >>
> >> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
> >> ---
> >>  arch/arm/boards/crystalfontz-cfa10036/cfa10036.c |   44
> >> +++++++++++++++++++++- 1 file changed, 43 insertions(+), 1 deletion(-)
> >>
> >> diff --git a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> >> index b59dbab..1821b10 100644 
> >> --- a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> >> +++ b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> >> @@ -97,9 +97,46 @@ static int cfa10036_mem_init(void)
> >>  }
> >>  mem_initcall(cfa10036_mem_init);
> >>
> >> +/**
> >> + * Try to register an environment storage on the attached MCI card
> >> + * @return 0 on success
> >> + *
> >> + * We rely on the existence of a usable SD card, already attached to
> >> + * our system, to get something like a persistent memory for our environment.
> >> + * If this SD card is also the boot media, we can use the second partition
> >> + * for our environment purpose (if present!). 
> >> + */
> >> +static int register_persistant_environment(void)
> > 
> > register_persist*e*nt_environment
> > 
> > Seems a copy from my typo in the falconwing. I really should fix it :))
> 
> Oops :)
> I will fix it, it will probably end up in a common function anyway.
> 
FWIW : I have cooked a patch for this common function, I will be
able to send it tonight.

Eric

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Re: [PATCH 1/2] cfa-10036: Use the second MMC partition to store the environment

[Maxime Ripard]

Hi Juergen,

Le 14/02/2013 09:16, Juergen Beisert a écrit :
> Maxime Ripard wrote:
>> Since the only storage medium on the cfa-10036 is the MMC card, we need
>> to have a registered environment partition on it if we want to be able
>> to modify at runtime.
>>
>> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
>> ---
>>  arch/arm/boards/crystalfontz-cfa10036/cfa10036.c |   44
>> +++++++++++++++++++++- 1 file changed, 43 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
>> index b59dbab..1821b10 100644 
>> --- a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
>> +++ b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
>> @@ -97,9 +97,46 @@ static int cfa10036_mem_init(void)
>>  }
>>  mem_initcall(cfa10036_mem_init);
>>
>> +/**
>> + * Try to register an environment storage on the attached MCI card
>> + * @return 0 on success
>> + *
>> + * We rely on the existence of a usable SD card, already attached to
>> + * our system, to get something like a persistent memory for our environment.
>> + * If this SD card is also the boot media, we can use the second partition
>> + * for our environment purpose (if present!). 
>> + */
>> +static int register_persistant_environment(void)
> 
> register_persist*e*nt_environment
> 
> Seems a copy from my typo in the falconwing. I really should fix it :))

Oops :)
I will fix it, it will probably end up in a common function anyway.

Thanks,
Maxime

-- 
Maxime Ripard, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

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Re: [PATCH 1/2] cfa-10036: Use the second MMC partition to store the environment

[Maxime Ripard]

Hi Jean-Christophe,

Le 13/02/2013 18:12, Jean-Christophe PLAGNIOL-VILLARD a écrit :
> On 17:45 Wed 13 Feb     , Maxime Ripard wrote:
>> Since the only storage medium on the cfa-10036 is the MMC card, we need
>> to have a registered environment partition on it if we want to be able
>> to modify at runtime.
>>
>> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
>> ---
>>  arch/arm/boards/crystalfontz-cfa10036/cfa10036.c |   44 +++++++++++++++++++++-
>>  1 file changed, 43 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
>> index b59dbab..1821b10 100644
>> --- a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
>> +++ b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
>> @@ -97,9 +97,46 @@ static int cfa10036_mem_init(void)
>>  }
>>  mem_initcall(cfa10036_mem_init);
>>  
>> +/**
>> + * Try to register an environment storage on the attached MCI card
>> + * @return 0 on success
>> + *
>> + * We rely on the existence of a usable SD card, already attached to
>> + * our system, to get something like a persistent memory for our environment.
>> + * If this SD card is also the boot media, we can use the second partition
>> + * for our environment purpose (if present!).
>> + */
>> +static int register_persistant_environment(void)
>> +{
>> +	struct cdev *cdev;
>> +
>> +	/*
>> +	 * The CFA-10036 only has one MCI card socket.
>> +	 * So, we expect its name as "disk0".
>> +	 */
>> +	cdev = cdev_by_name("disk0");
>> +	if (cdev == NULL) {
>> +		pr_err("No SD card found\n");
>> +		return -ENODEV;
>> +	}
>> +
>> +	/* MCI card is present, also a useable partition on it? */
>> +	cdev = cdev_by_name("disk0.1");
>> +	if (cdev == NULL) {
>> +		pr_err("No second partition available\n");
>> +		pr_info("Please create at least a second partition with"
>> +			" 256 kiB...512 kiB in size (your choice)\n");
>> +		return -ENODEV;
>> +	}
>> +
>> +	/* use the full partition as our persistent environment storage */
>> +	return devfs_add_partition("disk0.1", 0, cdev->size,
>> +						DEVFS_PARTITION_FIXED, "env0");
>> +}
> it's time to have a common code

I'm ok with doing it, where should it be stored?

Maxime

-- 
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Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

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Re: [PATCH 1/2] cfa-10036: Use the second MMC partition to store the environment

[Juergen Beisert]

Maxime Ripard wrote:
> Since the only storage medium on the cfa-10036 is the MMC card, we need
> to have a registered environment partition on it if we want to be able
> to modify at runtime.
>
> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
> ---
>  arch/arm/boards/crystalfontz-cfa10036/cfa10036.c |   44
> +++++++++++++++++++++- 1 file changed, 43 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> index b59dbab..1821b10 100644 
> --- a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> +++ b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> @@ -97,9 +97,46 @@ static int cfa10036_mem_init(void)
>  }
>  mem_initcall(cfa10036_mem_init);
>
> +/**
> + * Try to register an environment storage on the attached MCI card
> + * @return 0 on success
> + *
> + * We rely on the existence of a usable SD card, already attached to
> + * our system, to get something like a persistent memory for our environment.
> + * If this SD card is also the boot media, we can use the second partition
> + * for our environment purpose (if present!). 
> + */
> +static int register_persistant_environment(void)

register_persist*e*nt_environment

Seems a copy from my typo in the falconwing. I really should fix it :))

> [...]

jbe

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Re: [PATCH 1/2] cfa-10036: Use the second MMC partition to store the environment

[Jean-Christophe PLAGNIOL-VILLARD]

On 17:45 Wed 13 Feb     , Maxime Ripard wrote:
> Since the only storage medium on the cfa-10036 is the MMC card, we need
> to have a registered environment partition on it if we want to be able
> to modify at runtime.
> 
> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
> ---
>  arch/arm/boards/crystalfontz-cfa10036/cfa10036.c |   44 +++++++++++++++++++++-
>  1 file changed, 43 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> index b59dbab..1821b10 100644
> --- a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> +++ b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> @@ -97,9 +97,46 @@ static int cfa10036_mem_init(void)
>  }
>  mem_initcall(cfa10036_mem_init);
>  
> +/**
> + * Try to register an environment storage on the attached MCI card
> + * @return 0 on success
> + *
> + * We rely on the existence of a usable SD card, already attached to
> + * our system, to get something like a persistent memory for our environment.
> + * If this SD card is also the boot media, we can use the second partition
> + * for our environment purpose (if present!).
> + */
> +static int register_persistant_environment(void)
> +{
> +	struct cdev *cdev;
> +
> +	/*
> +	 * The CFA-10036 only has one MCI card socket.
> +	 * So, we expect its name as "disk0".
> +	 */
> +	cdev = cdev_by_name("disk0");
> +	if (cdev == NULL) {
> +		pr_err("No SD card found\n");
> +		return -ENODEV;
> +	}
> +
> +	/* MCI card is present, also a useable partition on it? */
> +	cdev = cdev_by_name("disk0.1");
> +	if (cdev == NULL) {
> +		pr_err("No second partition available\n");
> +		pr_info("Please create at least a second partition with"
> +			" 256 kiB...512 kiB in size (your choice)\n");
> +		return -ENODEV;
> +	}
> +
> +	/* use the full partition as our persistent environment storage */
> +	return devfs_add_partition("disk0.1", 0, cdev->size,
> +						DEVFS_PARTITION_FIXED, "env0");
> +}
it's time to have a common code

Best Regards,
J.
> +
>  static int cfa10036_devices_init(void)
>  {
> -	int i;
> +	int i, ret;
>  
>  	/* initizalize muxing */
>  	for (i = 0; i < ARRAY_SIZE(cfa10036_pads); i++)
> @@ -124,6 +161,11 @@ static int cfa10036_devices_init(void)
>  
>  	cfa10036_detect_hw();
>  
> +	ret = register_persistant_environment();
> +	if (ret != 0)
> +		printf("Cannot create the 'env0' persistant "
> +			 "environment storage (%d)\n", ret);
> +
>  	return 0;
>  }
>  device_initcall(cfa10036_devices_init);
> -- 
> 1.7.10.4
> 
> 
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Re: [PATCH 1/2] cfa-10036: Use the second MMC partition to store the environment

[Eric Bénard]

Hi Maxime,

Le Wed, 13 Feb 2013 17:45:17 +0100,
Maxime Ripard <maxime.ripard@free-electrons.com> a écrit :

> Since the only storage medium on the cfa-10036 is the MMC card, we need
> to have a registered environment partition on it if we want to be able
> to modify at runtime.
> 
maybe you could add :
code copied from imx23-olinuxino.c

Eric

> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
> ---
>  arch/arm/boards/crystalfontz-cfa10036/cfa10036.c |   44 +++++++++++++++++++++-
>  1 file changed, 43 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> index b59dbab..1821b10 100644
> --- a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> +++ b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
> @@ -97,9 +97,46 @@ static int cfa10036_mem_init(void)
>  }
>  mem_initcall(cfa10036_mem_init);
>  
> +/**
> + * Try to register an environment storage on the attached MCI card
> + * @return 0 on success
> + *
> + * We rely on the existence of a usable SD card, already attached to
> + * our system, to get something like a persistent memory for our environment.
> + * If this SD card is also the boot media, we can use the second partition
> + * for our environment purpose (if present!).
> + */
> +static int register_persistant_environment(void)
> +{
> +	struct cdev *cdev;
> +
> +	/*
> +	 * The CFA-10036 only has one MCI card socket.
> +	 * So, we expect its name as "disk0".
> +	 */
> +	cdev = cdev_by_name("disk0");
> +	if (cdev == NULL) {
> +		pr_err("No SD card found\n");
> +		return -ENODEV;
> +	}
> +
> +	/* MCI card is present, also a useable partition on it? */
> +	cdev = cdev_by_name("disk0.1");
> +	if (cdev == NULL) {
> +		pr_err("No second partition available\n");
> +		pr_info("Please create at least a second partition with"
> +			" 256 kiB...512 kiB in size (your choice)\n");
> +		return -ENODEV;
> +	}
> +
> +	/* use the full partition as our persistent environment storage */
> +	return devfs_add_partition("disk0.1", 0, cdev->size,
> +						DEVFS_PARTITION_FIXED, "env0");
> +}
> +
>  static int cfa10036_devices_init(void)
>  {
> -	int i;
> +	int i, ret;
>  
>  	/* initizalize muxing */
>  	for (i = 0; i < ARRAY_SIZE(cfa10036_pads); i++)
> @@ -124,6 +161,11 @@ static int cfa10036_devices_init(void)
>  
>  	cfa10036_detect_hw();
>  
> +	ret = register_persistant_environment();
> +	if (ret != 0)
> +		printf("Cannot create the 'env0' persistant "
> +			 "environment storage (%d)\n", ret);
> +
>  	return 0;
>  }
>  device_initcall(cfa10036_devices_init);


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[PATCH 1/2] cfa-10036: Use the second MMC partition to store the environment

[Maxime Ripard]

Since the only storage medium on the cfa-10036 is the MMC card, we need
to have a registered environment partition on it if we want to be able
to modify at runtime.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---
 arch/arm/boards/crystalfontz-cfa10036/cfa10036.c |   44 +++++++++++++++++++++-
 1 file changed, 43 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
index b59dbab..1821b10 100644
--- a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
+++ b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
@@ -97,9 +97,46 @@ static int cfa10036_mem_init(void)
 }
 mem_initcall(cfa10036_mem_init);
 
+/**
+ * Try to register an environment storage on the attached MCI card
+ * @return 0 on success
+ *
+ * We rely on the existence of a usable SD card, already attached to
+ * our system, to get something like a persistent memory for our environment.
+ * If this SD card is also the boot media, we can use the second partition
+ * for our environment purpose (if present!).
+ */
+static int register_persistant_environment(void)
+{
+	struct cdev *cdev;
+
+	/*
+	 * The CFA-10036 only has one MCI card socket.
+	 * So, we expect its name as "disk0".
+	 */
+	cdev = cdev_by_name("disk0");
+	if (cdev == NULL) {
+		pr_err("No SD card found\n");
+		return -ENODEV;
+	}
+
+	/* MCI card is present, also a useable partition on it? */
+	cdev = cdev_by_name("disk0.1");
+	if (cdev == NULL) {
+		pr_err("No second partition available\n");
+		pr_info("Please create at least a second partition with"
+			" 256 kiB...512 kiB in size (your choice)\n");
+		return -ENODEV;
+	}
+
+	/* use the full partition as our persistent environment storage */
+	return devfs_add_partition("disk0.1", 0, cdev->size,
+						DEVFS_PARTITION_FIXED, "env0");
+}
+
 static int cfa10036_devices_init(void)
 {
-	int i;
+	int i, ret;
 
 	/* initizalize muxing */
 	for (i = 0; i < ARRAY_SIZE(cfa10036_pads); i++)
@@ -124,6 +161,11 @@ static int cfa10036_devices_init(void)
 
 	cfa10036_detect_hw();
 
+	ret = register_persistant_environment();
+	if (ret != 0)
+		printf("Cannot create the 'env0' persistant "
+			 "environment storage (%d)\n", ret);
+
 	return 0;
 }
 device_initcall(cfa10036_devices_init);
-- 
1.7.10.4


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