* pcmcia vs. MECR on pxa25x/sa1111
@ 2011-02-01 12:03 Pavel Machek
2011-02-01 12:59 ` Russell King
0 siblings, 1 reply; 4+ messages in thread
From: Pavel Machek @ 2011-02-01 12:03 UTC (permalink / raw)
To: kernel list; +Cc: cko, rmk+kernel, linux, eric.miao
After 2.6.34 changes, __pxa2xx_drv_pcmcia_probe() was replaced by
sa1111_pcmcia_add(). That unfortunately means that configure_sockets()
is not called, leading to MECR not being set properly, leading to
strange crashes.
Tested on pxa255+sa1111, I do not have lubbock board nearby. Perhaps
cleaner solution exists?
Signed-off-by: Pavel Machek <pma@sysgo.com>
--- a/drivers/pcmcia/pxa2xx_base.c
+++ b/drivers/pcmcia/pxa2xx_base.c
@@ -204,10 +204,10 @@ pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
}
#endif
-static void pxa2xx_configure_sockets(struct device *dev)
+void pxa2xx_configure_sockets(struct device *dev)
{
struct pcmcia_low_level *ops = dev->platform_data;
/*
* We have at least one socket, so set MECR:CIT
* (Card Is There)
diff --git a/drivers/pcmcia/pxa2xx_lubbock.c b/drivers/pcmcia/pxa2xx_lubbock.c
--- a/drivers/pcmcia/pxa2xx_lubbock.c
+++ b/drivers/pcmcia/pxa2xx_lubbock.c
@@ -209,6 +209,8 @@ static struct pcmcia_low_level lubbock_pcmcia_ops = {
#include "pxa2xx_base.h"
+extern void pxa2xx_configure_sockets(struct device *dev);
+
int pcmcia_lubbock_init(struct sa1111_dev *sadev)
{
int ret = -ENODEV;
@@ -228,6 +230,7 @@ int pcmcia_lubbock_init(struct sa1111_dev *sadev)
pxa2xx_drv_pcmcia_ops(&lubbock_pcmcia_ops);
ret = sa1111_pcmcia_add(sadev, &lubbock_pcmcia_ops,
pxa2xx_drv_pcmcia_add_one);
+ pxa2xx_configure_sockets(&(sadev->dev));
}
return ret;
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: pcmcia vs. MECR on pxa25x/sa1111
2011-02-01 12:03 pcmcia vs. MECR on pxa25x/sa1111 Pavel Machek
@ 2011-02-01 12:59 ` Russell King
2011-02-04 8:03 ` Pavel Machek
0 siblings, 1 reply; 4+ messages in thread
From: Russell King @ 2011-02-01 12:59 UTC (permalink / raw)
To: Pavel Machek; +Cc: kernel list, cko, linux, eric.miao
On Tue, Feb 01, 2011 at 01:03:03PM +0100, Pavel Machek wrote:
>
> After 2.6.34 changes, __pxa2xx_drv_pcmcia_probe() was replaced by
> sa1111_pcmcia_add(). That unfortunately means that configure_sockets()
> is not called, leading to MECR not being set properly, leading to
> strange crashes.
>
> Tested on pxa255+sa1111, I do not have lubbock board nearby. Perhaps
> cleaner solution exists?
>
> Signed-off-by: Pavel Machek <pma@sysgo.com>
>
>
> --- a/drivers/pcmcia/pxa2xx_base.c
> +++ b/drivers/pcmcia/pxa2xx_base.c
> @@ -204,10 +204,10 @@ pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
> }
> #endif
>
> -static void pxa2xx_configure_sockets(struct device *dev)
> +void pxa2xx_configure_sockets(struct device *dev)
> {
> struct pcmcia_low_level *ops = dev->platform_data;
>
> /*
> * We have at least one socket, so set MECR:CIT
> * (Card Is There)
> diff --git a/drivers/pcmcia/pxa2xx_lubbock.c b/drivers/pcmcia/pxa2xx_lubbock.c
> --- a/drivers/pcmcia/pxa2xx_lubbock.c
> +++ b/drivers/pcmcia/pxa2xx_lubbock.c
> @@ -209,6 +209,8 @@ static struct pcmcia_low_level lubbock_pcmcia_ops = {
>
> #include "pxa2xx_base.h"
>
> +extern void pxa2xx_configure_sockets(struct device *dev);
> +
Please put function prototypes in header files.
> int pcmcia_lubbock_init(struct sa1111_dev *sadev)
> {
> int ret = -ENODEV;
> @@ -228,6 +230,7 @@ int pcmcia_lubbock_init(struct sa1111_dev *sadev)
> pxa2xx_drv_pcmcia_ops(&lubbock_pcmcia_ops);
> ret = sa1111_pcmcia_add(sadev, &lubbock_pcmcia_ops,
> pxa2xx_drv_pcmcia_add_one);
> + pxa2xx_configure_sockets(&(sadev->dev));
Additional parens not required.
While making this a visible function, it may also make sense to
change it from taking a struct device pointer to taking the
struct pcmcia_low_level pointer which is really what its after.
Lastly the ordering of pxa2xx_configure_sockets() is wrong - doing
setup after adding sockets is racy. That's probably something which
should fixed in the pxa2xx code too.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of:
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: pcmcia vs. MECR on pxa25x/sa1111
2011-02-01 12:59 ` Russell King
@ 2011-02-04 8:03 ` Pavel Machek
2011-02-16 7:25 ` Dominik Brodowski
0 siblings, 1 reply; 4+ messages in thread
From: Pavel Machek @ 2011-02-04 8:03 UTC (permalink / raw)
To: Russell King; +Cc: kernel list, cko, linux, eric.miao, Andrew Morton
After 2.6.34 changes, __pxa2xx_drv_pcmcia_probe() was replaced by
sa1111_pcmcia_add(). That unfortunately means that configure_sockets()
is not called, leading to MECR not being set properly, leading to
strange crashes.
Tested on pxa255+sa1111, I do not have lubbock board nearby. Perhaps
cleaner solution exists?
Signed-off-by: Pavel Machek <pma@sysgo.com>
---
Here's updated version. I'd prefer not to do too extensive changes as
I do not have lubbock nearby.
--- a/drivers/pcmcia/pxa2xx_base.c
+++ b/drivers/pcmcia/pxa2xx_base.c
@@ -204,7 +204,7 @@ pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
}
#endif
-static void pxa2xx_configure_sockets(struct device *dev)
+void pxa2xx_configure_sockets(struct device *dev)
{
struct pcmcia_low_level *ops = dev->platform_data;
--- a/drivers/pcmcia/pxa2xx_base.h
+++ b/drivers/pcmcia/pxa2xx_base.h
@@ -1,3 +1,4 @@
int pxa2xx_drv_pcmcia_add_one(struct soc_pcmcia_socket *skt);
void pxa2xx_drv_pcmcia_ops(struct pcmcia_low_level *ops);
+void pxa2xx_configure_sockets(struct device *dev);
--- a/drivers/pcmcia/pxa2xx_lubbock.c
+++ b/drivers/pcmcia/pxa2xx_lubbock.c
@@ -226,6 +226,7 @@ int pcmcia_lubbock_init(struct sa1111_dev *sadev)
lubbock_set_misc_wr((1 << 15) | (1 << 14), 0);
pxa2xx_drv_pcmcia_ops(&lubbock_pcmcia_ops);
+ pxa2xx_configure_sockets(&sadev->dev);
ret = sa1111_pcmcia_add(sadev, &lubbock_pcmcia_ops,
pxa2xx_drv_pcmcia_add_one);
}
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: pcmcia vs. MECR on pxa25x/sa1111
2011-02-04 8:03 ` Pavel Machek
@ 2011-02-16 7:25 ` Dominik Brodowski
0 siblings, 0 replies; 4+ messages in thread
From: Dominik Brodowski @ 2011-02-16 7:25 UTC (permalink / raw)
To: Pavel Machek; +Cc: Russell King, kernel list, cko, eric.miao, Andrew Morton
Russell,
On Fri, Feb 04, 2011 at 09:03:43AM +0100, Pavel Machek wrote:
>
> After 2.6.34 changes, __pxa2xx_drv_pcmcia_probe() was replaced by
> sa1111_pcmcia_add(). That unfortunately means that configure_sockets()
> is not called, leading to MECR not being set properly, leading to
> strange crashes.
>
> Tested on pxa255+sa1111, I do not have lubbock board nearby. Perhaps
> cleaner solution exists?
>
> Signed-off-by: Pavel Machek <pma@sysgo.com>
>
> ---
>
> Here's updated version. I'd prefer not to do too extensive changes as
> I do not have lubbock nearby.
will you pick this up, or shall I?
Best,
Dominik
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2011-02-16 7:49 UTC | newest]
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2011-02-01 12:59 ` Russell King
2011-02-04 8:03 ` Pavel Machek
2011-02-16 7:25 ` Dominik Brodowski
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