* [PATCH] usb: musb: core: add common method of getting vbus status
@ 2015-10-12 13:59 Roman Alyautdin
2015-10-12 14:13 ` Roman Alyautdin
2015-10-12 14:14 ` Roman Alyautdin
0 siblings, 2 replies; 4+ messages in thread
From: Roman Alyautdin @ 2015-10-12 13:59 UTC (permalink / raw)
To: balbi; +Cc: linux-usb, linux-kernel, sergei.shtylyov, Roman Alyautdin
Fix musb_platform_get_vbus_status return value in case of platform
implementation is not defined, bringing expected behaviour of
musb_platform_get wrapper. Add musb_vbus_show default method to determine
VBUS status in case platform method is not defined.
Signed-off-by: Roman Alyautdin <ralyautdin@dev.rtsoft.ru>
---
drivers/usb/musb/musb_core.c | 13 ++++++++++---
drivers/usb/musb/musb_core.h | 2 +-
2 files changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 4a518ff..3551540 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1771,13 +1771,20 @@ musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf)
unsigned long flags;
unsigned long val;
int vbus;
+ u8 devctl;
spin_lock_irqsave(&musb->lock, flags);
val = musb->a_wait_bcon;
- /* FIXME get_vbus_status() is normally #defined as false...
- * and is effectively TUSB-specific.
- */
vbus = musb_platform_get_vbus_status(musb);
+ if (vbus < 0) {
+ /* Use default MUSB method by means of DEVCTL register */
+ devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
+ if ((devctl & MUSB_DEVCTL_VBUS)
+ != (3 << MUSB_DEVCTL_VBUS_SHIFT))
+ vbus = 1;
+ else
+ vbus = 0;
+ }
spin_unlock_irqrestore(&musb->lock, flags);
return sprintf(buf, "Vbus %s, timeout %lu msec\n",
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index 4b886d0..2337d7a 100644
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -579,7 +579,7 @@ static inline int musb_platform_recover(struct musb *musb)
static inline int musb_platform_get_vbus_status(struct musb *musb)
{
if (!musb->ops->vbus_status)
- return 0;
+ return -EINVAL;
return musb->ops->vbus_status(musb);
}
--
1.7.9.5
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] usb: musb: core: add common method of getting vbus status
2015-10-12 13:59 [PATCH] usb: musb: core: add common method of getting vbus status Roman Alyautdin
@ 2015-10-12 14:13 ` Roman Alyautdin
2015-10-12 14:14 ` Roman Alyautdin
1 sibling, 0 replies; 4+ messages in thread
From: Roman Alyautdin @ 2015-10-12 14:13 UTC (permalink / raw)
To: Roman Alyautdin; +Cc: balbi, linux-usb, linux-kernel, sergei.shtylyov
On 12/10/15 16:59, Roman Alyautdin wrote:
> Fix musb_platform_get_vbus_status return value in case of platform
> implementation is not defined, bringing expected behaviour of
> musb_platform_get wrapper. Add musb_vbus_show default method to determine
> VBUS status in case platform method is not defined.
>
> Signed-off-by: Roman Alyautdin <ralyautdin@dev.rtsoft.ru>
> ---
> drivers/usb/musb/musb_core.c | 13 ++++++++++---
> drivers/usb/musb/musb_core.h | 2 +-
> 2 files changed, 11 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
> index 4a518ff..3551540 100644
> --- a/drivers/usb/musb/musb_core.c
> +++ b/drivers/usb/musb/musb_core.c
> @@ -1771,13 +1771,20 @@ musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf)
> unsigned long flags;
> unsigned long val;
> int vbus;
> + u8 devctl;
>
> spin_lock_irqsave(&musb->lock, flags);
> val = musb->a_wait_bcon;
> - /* FIXME get_vbus_status() is normally #defined as false...
> - * and is effectively TUSB-specific.
> - */
> vbus = musb_platform_get_vbus_status(musb);
> + if (vbus < 0) {
> + /* Use default MUSB method by means of DEVCTL register */
> + devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
> + if ((devctl & MUSB_DEVCTL_VBUS)
> + != (3 << MUSB_DEVCTL_VBUS_SHIFT))
> + vbus = 1;
> + else
> + vbus = 0;
> + }
> spin_unlock_irqrestore(&musb->lock, flags);
>
> return sprintf(buf, "Vbus %s, timeout %lu msec\n",
> diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
> index 4b886d0..2337d7a 100644
> --- a/drivers/usb/musb/musb_core.h
> +++ b/drivers/usb/musb/musb_core.h
> @@ -579,7 +579,7 @@ static inline int musb_platform_recover(struct musb *musb)
> static inline int musb_platform_get_vbus_status(struct musb *musb)
> {
> if (!musb->ops->vbus_status)
> - return 0;
> + return -EINVAL;
>
> return musb->ops->vbus_status(musb);
> }
Sorry, looks like logic inversion, will update soon
Regards,
Roman
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH] usb: musb: core: add common method of getting vbus status
2015-10-12 13:59 [PATCH] usb: musb: core: add common method of getting vbus status Roman Alyautdin
2015-10-12 14:13 ` Roman Alyautdin
@ 2015-10-12 14:14 ` Roman Alyautdin
2015-10-12 16:44 ` Sergei Shtylyov
1 sibling, 1 reply; 4+ messages in thread
From: Roman Alyautdin @ 2015-10-12 14:14 UTC (permalink / raw)
To: balbi; +Cc: linux-usb, linux-kernel, sergei.shtylyov, Roman Alyautdin
Fix musb_platform_get_vbus_status return value in case of platform
implementation is not defined, bringing expected behaviour of
musb_platform_get wrapper. Add musb_vbus_show default method to determine
VBUS status in case platform method is not defined.
Signed-off-by: Roman Alyautdin <ralyautdin@dev.rtsoft.ru>
---
drivers/usb/musb/musb_core.c | 13 ++++++++++---
drivers/usb/musb/musb_core.h | 2 +-
2 files changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 4a518ff..3551540 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1771,13 +1771,20 @@ musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf)
unsigned long flags;
unsigned long val;
int vbus;
+ u8 devctl;
spin_lock_irqsave(&musb->lock, flags);
val = musb->a_wait_bcon;
- /* FIXME get_vbus_status() is normally #defined as false...
- * and is effectively TUSB-specific.
- */
vbus = musb_platform_get_vbus_status(musb);
+ if (vbus < 0) {
+ /* Use default MUSB method by means of DEVCTL register */
+ devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
+ if ((devctl & MUSB_DEVCTL_VBUS)
+ == (3 << MUSB_DEVCTL_VBUS_SHIFT))
+ vbus = 1;
+ else
+ vbus = 0;
+ }
spin_unlock_irqrestore(&musb->lock, flags);
return sprintf(buf, "Vbus %s, timeout %lu msec\n",
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index 4b886d0..2337d7a 100644
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -579,7 +579,7 @@ static inline int musb_platform_recover(struct musb *musb)
static inline int musb_platform_get_vbus_status(struct musb *musb)
{
if (!musb->ops->vbus_status)
- return 0;
+ return -EINVAL;
return musb->ops->vbus_status(musb);
}
--
1.7.9.5
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] usb: musb: core: add common method of getting vbus status
2015-10-12 14:14 ` Roman Alyautdin
@ 2015-10-12 16:44 ` Sergei Shtylyov
0 siblings, 0 replies; 4+ messages in thread
From: Sergei Shtylyov @ 2015-10-12 16:44 UTC (permalink / raw)
To: Roman Alyautdin, balbi; +Cc: linux-usb, linux-kernel
Hello.
On 10/12/2015 05:14 PM, Roman Alyautdin wrote:
> Fix musb_platform_get_vbus_status return value in case of platform
> implementation is not defined, bringing expected behaviour of
> musb_platform_get wrapper. Add musb_vbus_show default method to determine
> VBUS status in case platform method is not defined.
>
> Signed-off-by: Roman Alyautdin <ralyautdin@dev.rtsoft.ru>
> ---
> drivers/usb/musb/musb_core.c | 13 ++++++++++---
> drivers/usb/musb/musb_core.h | 2 +-
> 2 files changed, 11 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
> index 4a518ff..3551540 100644
> --- a/drivers/usb/musb/musb_core.c
> +++ b/drivers/usb/musb/musb_core.c
> @@ -1771,13 +1771,20 @@ musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf)
> unsigned long flags;
> unsigned long val;
> int vbus;
> + u8 devctl;
I'd add the variable to the block it's used in but this way is OK too.
[...]
MBR, Sergei
^ permalink raw reply [flat|nested] 4+ messages in thread
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2015-10-12 13:59 [PATCH] usb: musb: core: add common method of getting vbus status Roman Alyautdin
2015-10-12 14:13 ` Roman Alyautdin
2015-10-12 14:14 ` Roman Alyautdin
2015-10-12 16:44 ` Sergei Shtylyov
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