[PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[neal_liu]

Retitle.

For Aspeed, HCHalted status depends on not only Run/Stop but also
ASS/PSS status.
Handshake CMD_RUN on startup instead.

Signed-off-by: neal_liu <neal_liu@aspeedtech.com>
---
 drivers/usb/host/ehci-hcd.c      | 11 ++++++++++-
 drivers/usb/host/ehci-platform.c |  6 ++++++
 drivers/usb/host/ehci.h          |  1 +
 3 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 10b0365f3439..01c022e46aa2 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
 	/* Wait until HC become operational */
 	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes */
 	msleep(5);
-	rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
+
+	/* For Aspeed, STS_HALT also depends on ASS/PSS status.
+	 * Skip this check on startup.
+	 */
+	if (ehci->is_aspeed)
+		rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
+				    1, 100 * 1000);
+	else
+		rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
+				    0, 100 * 1000);
 
 	up_write(&ehci_cf_port_reset_rwsem);
 
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index c70f2d0b4aaf..c3dc906274d9 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -297,6 +297,12 @@ static int ehci_platform_probe(struct platform_device *dev)
 					  "has-transaction-translator"))
 			hcd->has_tt = 1;
 
+		if (of_device_is_compatible(dev->dev.of_node,
+					    "aspeed,ast2500-ehci") ||
+		    of_device_is_compatible(dev->dev.of_node,
+					    "aspeed,ast2600-ehci"))
+			ehci->is_aspeed = 1;
+
 		if (soc_device_match(quirk_poll_match))
 			priv->quirk_poll = true;
 
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 80bb823aa9fe..fdd073cc053b 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -219,6 +219,7 @@ struct ehci_hcd {			/* one per controller */
 	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
 	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
 	unsigned		spurious_oc:1;
+	unsigned		is_aspeed:1;
 
 	/* required for usb32 quirk */
 	#define OHCI_CTRL_HCFS          (3 << 6)
-- 
2.17.1

[PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[neal_liu]

Retitle.

For Aspeed, HCHalted status depends on not only Run/Stop but also
ASS/PSS status.
Handshake CMD_RUN on startup instead.

Signed-off-by: neal_liu <neal_liu@aspeedtech.com>
---
 drivers/usb/host/ehci-hcd.c      | 11 ++++++++++-
 drivers/usb/host/ehci-platform.c |  6 ++++++
 drivers/usb/host/ehci.h          |  1 +
 3 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 10b0365f3439..01c022e46aa2 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
 	/* Wait until HC become operational */
 	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes */
 	msleep(5);
-	rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
+
+	/* For Aspeed, STS_HALT also depends on ASS/PSS status.
+	 * Skip this check on startup.
+	 */
+	if (ehci->is_aspeed)
+		rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
+				    1, 100 * 1000);
+	else
+		rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
+				    0, 100 * 1000);
 
 	up_write(&ehci_cf_port_reset_rwsem);
 
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index c70f2d0b4aaf..c3dc906274d9 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -297,6 +297,12 @@ static int ehci_platform_probe(struct platform_device *dev)
 					  "has-transaction-translator"))
 			hcd->has_tt = 1;
 
+		if (of_device_is_compatible(dev->dev.of_node,
+					    "aspeed,ast2500-ehci") ||
+		    of_device_is_compatible(dev->dev.of_node,
+					    "aspeed,ast2600-ehci"))
+			ehci->is_aspeed = 1;
+
 		if (soc_device_match(quirk_poll_match))
 			priv->quirk_poll = true;
 
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 80bb823aa9fe..fdd073cc053b 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -219,6 +219,7 @@ struct ehci_hcd {			/* one per controller */
 	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
 	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
 	unsigned		spurious_oc:1;
+	unsigned		is_aspeed:1;
 
 	/* required for usb32 quirk */
 	#define OHCI_CTRL_HCFS          (3 << 6)
-- 
2.17.1


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Re: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[Greg Kroah-Hartman]

On Wed, Sep 01, 2021 at 11:50:41AM +0800, neal_liu wrote:
> Retitle.
> 
> For Aspeed, HCHalted status depends on not only Run/Stop but also
> ASS/PSS status.
> Handshake CMD_RUN on startup instead.
> 
> Signed-off-by: neal_liu <neal_liu@aspeedtech.com>
> ---
>  drivers/usb/host/ehci-hcd.c      | 11 ++++++++++-
>  drivers/usb/host/ehci-platform.c |  6 ++++++
>  drivers/usb/host/ehci.h          |  1 +
>  3 files changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
> index 10b0365f3439..01c022e46aa2 100644
> --- a/drivers/usb/host/ehci-hcd.c
> +++ b/drivers/usb/host/ehci-hcd.c
> @@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
>  	/* Wait until HC become operational */
>  	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes */
>  	msleep(5);
> -	rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
> +
> +	/* For Aspeed, STS_HALT also depends on ASS/PSS status.
> +	 * Skip this check on startup.
> +	 */
> +	if (ehci->is_aspeed)
> +		rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
> +				    1, 100 * 1000);
> +	else
> +		rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
> +				    0, 100 * 1000);
>  
>  	up_write(&ehci_cf_port_reset_rwsem);
>  
> diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
> index c70f2d0b4aaf..c3dc906274d9 100644
> --- a/drivers/usb/host/ehci-platform.c
> +++ b/drivers/usb/host/ehci-platform.c
> @@ -297,6 +297,12 @@ static int ehci_platform_probe(struct platform_device *dev)
>  					  "has-transaction-translator"))
>  			hcd->has_tt = 1;
>  
> +		if (of_device_is_compatible(dev->dev.of_node,
> +					    "aspeed,ast2500-ehci") ||
> +		    of_device_is_compatible(dev->dev.of_node,
> +					    "aspeed,ast2600-ehci"))
> +			ehci->is_aspeed = 1;
> +
>  		if (soc_device_match(quirk_poll_match))
>  			priv->quirk_poll = true;
>  
> diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
> index 80bb823aa9fe..fdd073cc053b 100644
> --- a/drivers/usb/host/ehci.h
> +++ b/drivers/usb/host/ehci.h
> @@ -219,6 +219,7 @@ struct ehci_hcd {			/* one per controller */
>  	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
>  	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
>  	unsigned		spurious_oc:1;
> +	unsigned		is_aspeed:1;
>  
>  	/* required for usb32 quirk */
>  	#define OHCI_CTRL_HCFS          (3 << 6)
> -- 
> 2.17.1
> 

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created.  Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.

You are receiving this message because of the following common error(s)
as indicated below:

- It looks like you did not use your "real" name for the patch on either
  the Signed-off-by: line, or the From: line (both of which have to
  match).  Please read the kernel file, Documentation/SubmittingPatches
  for how to do this correctly.

- This looks like a new version of a previously submitted patch, but you
  did not list below the --- line any changes from the previous version.
  Please read the section entitled "The canonical patch format" in the
  kernel file, Documentation/SubmittingPatches for what needs to be done
  here to properly describe this.

If you wish to discuss this problem further, or you have questions about
how to resolve this issue, please feel free to respond to this email and
Greg will reply once he has dug out from the pending patches received
from other developers.

thanks,

greg k-h's patch email bot

Re: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[Greg Kroah-Hartman]

On Wed, Sep 01, 2021 at 11:50:41AM +0800, neal_liu wrote:
> Retitle.
> 
> For Aspeed, HCHalted status depends on not only Run/Stop but also
> ASS/PSS status.
> Handshake CMD_RUN on startup instead.
> 
> Signed-off-by: neal_liu <neal_liu@aspeedtech.com>
> ---
>  drivers/usb/host/ehci-hcd.c      | 11 ++++++++++-
>  drivers/usb/host/ehci-platform.c |  6 ++++++
>  drivers/usb/host/ehci.h          |  1 +
>  3 files changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
> index 10b0365f3439..01c022e46aa2 100644
> --- a/drivers/usb/host/ehci-hcd.c
> +++ b/drivers/usb/host/ehci-hcd.c
> @@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
>  	/* Wait until HC become operational */
>  	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes */
>  	msleep(5);
> -	rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
> +
> +	/* For Aspeed, STS_HALT also depends on ASS/PSS status.
> +	 * Skip this check on startup.
> +	 */
> +	if (ehci->is_aspeed)
> +		rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
> +				    1, 100 * 1000);
> +	else
> +		rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
> +				    0, 100 * 1000);
>  
>  	up_write(&ehci_cf_port_reset_rwsem);
>  
> diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
> index c70f2d0b4aaf..c3dc906274d9 100644
> --- a/drivers/usb/host/ehci-platform.c
> +++ b/drivers/usb/host/ehci-platform.c
> @@ -297,6 +297,12 @@ static int ehci_platform_probe(struct platform_device *dev)
>  					  "has-transaction-translator"))
>  			hcd->has_tt = 1;
>  
> +		if (of_device_is_compatible(dev->dev.of_node,
> +					    "aspeed,ast2500-ehci") ||
> +		    of_device_is_compatible(dev->dev.of_node,
> +					    "aspeed,ast2600-ehci"))
> +			ehci->is_aspeed = 1;
> +
>  		if (soc_device_match(quirk_poll_match))
>  			priv->quirk_poll = true;
>  
> diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
> index 80bb823aa9fe..fdd073cc053b 100644
> --- a/drivers/usb/host/ehci.h
> +++ b/drivers/usb/host/ehci.h
> @@ -219,6 +219,7 @@ struct ehci_hcd {			/* one per controller */
>  	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
>  	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
>  	unsigned		spurious_oc:1;
> +	unsigned		is_aspeed:1;
>  
>  	/* required for usb32 quirk */
>  	#define OHCI_CTRL_HCFS          (3 << 6)
> -- 
> 2.17.1
> 

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created.  Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.

You are receiving this message because of the following common error(s)
as indicated below:

- It looks like you did not use your "real" name for the patch on either
  the Signed-off-by: line, or the From: line (both of which have to
  match).  Please read the kernel file, Documentation/SubmittingPatches
  for how to do this correctly.

- This looks like a new version of a previously submitted patch, but you
  did not list below the --- line any changes from the previous version.
  Please read the section entitled "The canonical patch format" in the
  kernel file, Documentation/SubmittingPatches for what needs to be done
  here to properly describe this.

If you wish to discuss this problem further, or you have questions about
how to resolve this issue, please feel free to respond to this email and
Greg will reply once he has dug out from the pending patches received
from other developers.

thanks,

greg k-h's patch email bot

_______________________________________________
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[Alan Stern]

On Wed, Sep 01, 2021 at 11:50:41AM +0800, neal_liu wrote:
> Retitle.
> 
> For Aspeed, HCHalted status depends on not only Run/Stop but also
> ASS/PSS status.
> Handshake CMD_RUN on startup instead.
> 
> Signed-off-by: neal_liu <neal_liu@aspeedtech.com>

I'm still a little doubtful about doing this, but if you guys say it works 
for your hardware then I guess it's okay.

Acked-by: Alan Stern <stern@rowland.harvard.edu>

> ---
>  drivers/usb/host/ehci-hcd.c      | 11 ++++++++++-
>  drivers/usb/host/ehci-platform.c |  6 ++++++
>  drivers/usb/host/ehci.h          |  1 +
>  3 files changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
> index 10b0365f3439..01c022e46aa2 100644
> --- a/drivers/usb/host/ehci-hcd.c
> +++ b/drivers/usb/host/ehci-hcd.c
> @@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
>  	/* Wait until HC become operational */
>  	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes */
>  	msleep(5);
> -	rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
> +
> +	/* For Aspeed, STS_HALT also depends on ASS/PSS status.
> +	 * Skip this check on startup.
> +	 */
> +	if (ehci->is_aspeed)
> +		rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
> +				    1, 100 * 1000);
> +	else
> +		rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
> +				    0, 100 * 1000);
>  
>  	up_write(&ehci_cf_port_reset_rwsem);
>  
> diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
> index c70f2d0b4aaf..c3dc906274d9 100644
> --- a/drivers/usb/host/ehci-platform.c
> +++ b/drivers/usb/host/ehci-platform.c
> @@ -297,6 +297,12 @@ static int ehci_platform_probe(struct platform_device *dev)
>  					  "has-transaction-translator"))
>  			hcd->has_tt = 1;
>  
> +		if (of_device_is_compatible(dev->dev.of_node,
> +					    "aspeed,ast2500-ehci") ||
> +		    of_device_is_compatible(dev->dev.of_node,
> +					    "aspeed,ast2600-ehci"))
> +			ehci->is_aspeed = 1;
> +
>  		if (soc_device_match(quirk_poll_match))
>  			priv->quirk_poll = true;
>  
> diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
> index 80bb823aa9fe..fdd073cc053b 100644
> --- a/drivers/usb/host/ehci.h
> +++ b/drivers/usb/host/ehci.h
> @@ -219,6 +219,7 @@ struct ehci_hcd {			/* one per controller */
>  	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
>  	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
>  	unsigned		spurious_oc:1;
> +	unsigned		is_aspeed:1;
>  
>  	/* required for usb32 quirk */
>  	#define OHCI_CTRL_HCFS          (3 << 6)
> -- 
> 2.17.1
> 

Re: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[Alan Stern]

On Wed, Sep 01, 2021 at 11:50:41AM +0800, neal_liu wrote:
> Retitle.
> 
> For Aspeed, HCHalted status depends on not only Run/Stop but also
> ASS/PSS status.
> Handshake CMD_RUN on startup instead.
> 
> Signed-off-by: neal_liu <neal_liu@aspeedtech.com>

I'm still a little doubtful about doing this, but if you guys say it works 
for your hardware then I guess it's okay.

Acked-by: Alan Stern <stern@rowland.harvard.edu>

> ---
>  drivers/usb/host/ehci-hcd.c      | 11 ++++++++++-
>  drivers/usb/host/ehci-platform.c |  6 ++++++
>  drivers/usb/host/ehci.h          |  1 +
>  3 files changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
> index 10b0365f3439..01c022e46aa2 100644
> --- a/drivers/usb/host/ehci-hcd.c
> +++ b/drivers/usb/host/ehci-hcd.c
> @@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
>  	/* Wait until HC become operational */
>  	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes */
>  	msleep(5);
> -	rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
> +
> +	/* For Aspeed, STS_HALT also depends on ASS/PSS status.
> +	 * Skip this check on startup.
> +	 */
> +	if (ehci->is_aspeed)
> +		rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
> +				    1, 100 * 1000);
> +	else
> +		rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
> +				    0, 100 * 1000);
>  
>  	up_write(&ehci_cf_port_reset_rwsem);
>  
> diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
> index c70f2d0b4aaf..c3dc906274d9 100644
> --- a/drivers/usb/host/ehci-platform.c
> +++ b/drivers/usb/host/ehci-platform.c
> @@ -297,6 +297,12 @@ static int ehci_platform_probe(struct platform_device *dev)
>  					  "has-transaction-translator"))
>  			hcd->has_tt = 1;
>  
> +		if (of_device_is_compatible(dev->dev.of_node,
> +					    "aspeed,ast2500-ehci") ||
> +		    of_device_is_compatible(dev->dev.of_node,
> +					    "aspeed,ast2600-ehci"))
> +			ehci->is_aspeed = 1;
> +
>  		if (soc_device_match(quirk_poll_match))
>  			priv->quirk_poll = true;
>  
> diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
> index 80bb823aa9fe..fdd073cc053b 100644
> --- a/drivers/usb/host/ehci.h
> +++ b/drivers/usb/host/ehci.h
> @@ -219,6 +219,7 @@ struct ehci_hcd {			/* one per controller */
>  	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
>  	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
>  	unsigned		spurious_oc:1;
> +	unsigned		is_aspeed:1;
>  
>  	/* required for usb32 quirk */
>  	#define OHCI_CTRL_HCFS          (3 << 6)
> -- 
> 2.17.1
> 

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RE: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[Neal Liu]

> -----Original Message-----
> From: Alan Stern <stern@rowland.harvard.edu>
> Sent: Thursday, September 2, 2021 12:41 AM
> To: Neal Liu <neal_liu@aspeedtech.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>; Tony Prisk
> <linux@prisktech.co.nz>; linux-usb@vger.kernel.org;
> linux-kernel@vger.kernel.org; linux-arm-kernel@lists.infradead.org; Tao Ren
> <rentao.bupt@gmail.com>; BMC-SW <BMC-SW@aspeedtech.com>
> Subject: Re: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT
> 
> On Wed, Sep 01, 2021 at 11:50:41AM +0800, neal_liu wrote:
> > Retitle.
> >
> > For Aspeed, HCHalted status depends on not only Run/Stop but also
> > ASS/PSS status.
> > Handshake CMD_RUN on startup instead.
> >
> > Signed-off-by: neal_liu <neal_liu@aspeedtech.com>
> 
> I'm still a little doubtful about doing this, but if you guys say it works for your
> hardware then I guess it's okay.
> 
> Acked-by: Alan Stern <stern@rowland.harvard.edu>
 
Thanks for your review.

> > ---
> >  drivers/usb/host/ehci-hcd.c      | 11 ++++++++++-
> >  drivers/usb/host/ehci-platform.c |  6 ++++++
> >  drivers/usb/host/ehci.h          |  1 +
> >  3 files changed, 17 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
> > index 10b0365f3439..01c022e46aa2 100644
> > --- a/drivers/usb/host/ehci-hcd.c
> > +++ b/drivers/usb/host/ehci-hcd.c
> > @@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
> >  	/* Wait until HC become operational */
> >  	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes */
> >  	msleep(5);
> > -	rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
> > +
> > +	/* For Aspeed, STS_HALT also depends on ASS/PSS status.
> > +	 * Skip this check on startup.
> > +	 */
> > +	if (ehci->is_aspeed)
> > +		rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
> > +				    1, 100 * 1000);
> > +	else
> > +		rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
> > +				    0, 100 * 1000);
> >
> >  	up_write(&ehci_cf_port_reset_rwsem);
> >
> > diff --git a/drivers/usb/host/ehci-platform.c
> > b/drivers/usb/host/ehci-platform.c
> > index c70f2d0b4aaf..c3dc906274d9 100644
> > --- a/drivers/usb/host/ehci-platform.c
> > +++ b/drivers/usb/host/ehci-platform.c
> > @@ -297,6 +297,12 @@ static int ehci_platform_probe(struct
> platform_device *dev)
> >  					  "has-transaction-translator"))
> >  			hcd->has_tt = 1;
> >
> > +		if (of_device_is_compatible(dev->dev.of_node,
> > +					    "aspeed,ast2500-ehci") ||
> > +		    of_device_is_compatible(dev->dev.of_node,
> > +					    "aspeed,ast2600-ehci"))
> > +			ehci->is_aspeed = 1;
> > +
> >  		if (soc_device_match(quirk_poll_match))
> >  			priv->quirk_poll = true;
> >
> > diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index
> > 80bb823aa9fe..fdd073cc053b 100644
> > --- a/drivers/usb/host/ehci.h
> > +++ b/drivers/usb/host/ehci.h
> > @@ -219,6 +219,7 @@ struct ehci_hcd {			/* one per controller */
> >  	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
> >  	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
> >  	unsigned		spurious_oc:1;
> > +	unsigned		is_aspeed:1;
> >
> >  	/* required for usb32 quirk */
> >  	#define OHCI_CTRL_HCFS          (3 << 6)
> > --
> > 2.17.1
> >

RE: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[Neal Liu]

> -----Original Message-----
> From: Alan Stern <stern@rowland.harvard.edu>
> Sent: Thursday, September 2, 2021 12:41 AM
> To: Neal Liu <neal_liu@aspeedtech.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>; Tony Prisk
> <linux@prisktech.co.nz>; linux-usb@vger.kernel.org;
> linux-kernel@vger.kernel.org; linux-arm-kernel@lists.infradead.org; Tao Ren
> <rentao.bupt@gmail.com>; BMC-SW <BMC-SW@aspeedtech.com>
> Subject: Re: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT
> 
> On Wed, Sep 01, 2021 at 11:50:41AM +0800, neal_liu wrote:
> > Retitle.
> >
> > For Aspeed, HCHalted status depends on not only Run/Stop but also
> > ASS/PSS status.
> > Handshake CMD_RUN on startup instead.
> >
> > Signed-off-by: neal_liu <neal_liu@aspeedtech.com>
> 
> I'm still a little doubtful about doing this, but if you guys say it works for your
> hardware then I guess it's okay.
> 
> Acked-by: Alan Stern <stern@rowland.harvard.edu>
 
Thanks for your review.

> > ---
> >  drivers/usb/host/ehci-hcd.c      | 11 ++++++++++-
> >  drivers/usb/host/ehci-platform.c |  6 ++++++
> >  drivers/usb/host/ehci.h          |  1 +
> >  3 files changed, 17 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
> > index 10b0365f3439..01c022e46aa2 100644
> > --- a/drivers/usb/host/ehci-hcd.c
> > +++ b/drivers/usb/host/ehci-hcd.c
> > @@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
> >  	/* Wait until HC become operational */
> >  	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes */
> >  	msleep(5);
> > -	rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
> > +
> > +	/* For Aspeed, STS_HALT also depends on ASS/PSS status.
> > +	 * Skip this check on startup.
> > +	 */
> > +	if (ehci->is_aspeed)
> > +		rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
> > +				    1, 100 * 1000);
> > +	else
> > +		rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
> > +				    0, 100 * 1000);
> >
> >  	up_write(&ehci_cf_port_reset_rwsem);
> >
> > diff --git a/drivers/usb/host/ehci-platform.c
> > b/drivers/usb/host/ehci-platform.c
> > index c70f2d0b4aaf..c3dc906274d9 100644
> > --- a/drivers/usb/host/ehci-platform.c
> > +++ b/drivers/usb/host/ehci-platform.c
> > @@ -297,6 +297,12 @@ static int ehci_platform_probe(struct
> platform_device *dev)
> >  					  "has-transaction-translator"))
> >  			hcd->has_tt = 1;
> >
> > +		if (of_device_is_compatible(dev->dev.of_node,
> > +					    "aspeed,ast2500-ehci") ||
> > +		    of_device_is_compatible(dev->dev.of_node,
> > +					    "aspeed,ast2600-ehci"))
> > +			ehci->is_aspeed = 1;
> > +
> >  		if (soc_device_match(quirk_poll_match))
> >  			priv->quirk_poll = true;
> >
> > diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index
> > 80bb823aa9fe..fdd073cc053b 100644
> > --- a/drivers/usb/host/ehci.h
> > +++ b/drivers/usb/host/ehci.h
> > @@ -219,6 +219,7 @@ struct ehci_hcd {			/* one per controller */
> >  	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
> >  	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
> >  	unsigned		spurious_oc:1;
> > +	unsigned		is_aspeed:1;
> >
> >  	/* required for usb32 quirk */
> >  	#define OHCI_CTRL_HCFS          (3 << 6)
> > --
> > 2.17.1
> >

_______________________________________________
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Re: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[Tao Ren]

Hi Neal,

On Wed, Sep 01, 2021 at 08:07:53AM +0200, Greg Kroah-Hartman wrote:
> On Wed, Sep 01, 2021 at 11:50:41AM +0800, neal_liu wrote:
> > Retitle.
> > 
> > For Aspeed, HCHalted status depends on not only Run/Stop but also
> > ASS/PSS status.
> > Handshake CMD_RUN on startup instead.
> > 
> > Signed-off-by: neal_liu <neal_liu@aspeedtech.com>
> > ---
> >  drivers/usb/host/ehci-hcd.c      | 11 ++++++++++-
> >  drivers/usb/host/ehci-platform.c |  6 ++++++
> >  drivers/usb/host/ehci.h          |  1 +
> >  3 files changed, 17 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
> > index 10b0365f3439..01c022e46aa2 100644
> > --- a/drivers/usb/host/ehci-hcd.c
> > +++ b/drivers/usb/host/ehci-hcd.c
> > @@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
> >  	/* Wait until HC become operational */
> >  	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes */
> >  	msleep(5);
> > -	rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
> > +
> > +	/* For Aspeed, STS_HALT also depends on ASS/PSS status.
> > +	 * Skip this check on startup.
> > +	 */
> > +	if (ehci->is_aspeed)
> > +		rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
> > +				    1, 100 * 1000);
> > +	else
> > +		rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
> > +				    0, 100 * 1000);
> >  
> >  	up_write(&ehci_cf_port_reset_rwsem);
> >  
> > diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
> > index c70f2d0b4aaf..c3dc906274d9 100644
> > --- a/drivers/usb/host/ehci-platform.c
> > +++ b/drivers/usb/host/ehci-platform.c
> > @@ -297,6 +297,12 @@ static int ehci_platform_probe(struct platform_device *dev)
> >  					  "has-transaction-translator"))
> >  			hcd->has_tt = 1;
> >  
> > +		if (of_device_is_compatible(dev->dev.of_node,
> > +					    "aspeed,ast2500-ehci") ||
> > +		    of_device_is_compatible(dev->dev.of_node,
> > +					    "aspeed,ast2600-ehci"))
> > +			ehci->is_aspeed = 1;
> > +
> >  		if (soc_device_match(quirk_poll_match))
> >  			priv->quirk_poll = true;
> >  
> > diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
> > index 80bb823aa9fe..fdd073cc053b 100644
> > --- a/drivers/usb/host/ehci.h
> > +++ b/drivers/usb/host/ehci.h
> > @@ -219,6 +219,7 @@ struct ehci_hcd {			/* one per controller */
> >  	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
> >  	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
> >  	unsigned		spurious_oc:1;
> > +	unsigned		is_aspeed:1;
> >  
> >  	/* required for usb32 quirk */
> >  	#define OHCI_CTRL_HCFS          (3 << 6)
> > -- 
> > 2.17.1
> > 
> 
> Hi,
> 
> This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
> a patch that has triggered this response.  He used to manually respond
> to these common problems, but in order to save his sanity (he kept
> writing the same thing over and over, yet to different people), I was
> created.  Hopefully you will not take offence and will fix the problem
> in your patch and resubmit it so that it can be accepted into the Linux
> kernel tree.
> 
> You are receiving this message because of the following common error(s)
> as indicated below:
> 
> - It looks like you did not use your "real" name for the patch on either
>   the Signed-off-by: line, or the From: line (both of which have to
>   match).  Please read the kernel file, Documentation/SubmittingPatches
>   for how to do this correctly.
> 
> - This looks like a new version of a previously submitted patch, but you
>   did not list below the --- line any changes from the previous version.
>   Please read the section entitled "The canonical patch format" in the
>   kernel file, Documentation/SubmittingPatches for what needs to be done
>   here to properly describe this.
> 
> If you wish to discuss this problem further, or you have questions about
> how to resolve this issue, please feel free to respond to this email and
> Greg will reply once he has dug out from the pending patches received
> from other developers.
> 
> thanks,
> 
> greg k-h's patch email bot

Thank you Neal for the patch. I tried the fix on my CMM (AST2500) and
Fuji (AST2600) BMC and it works on both platforms.

Can you please address Greg's comments above and send out a new version?
BTW, please don't forget to include Alan's Acked-by in the new version.

Reviewed-by: Tao Ren <rentao.bupt@gmail.com>
Tested-by: Tao Ren <rentao.bupt@gmail.com>


Cheers,

Tao

Re: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[Tao Ren]

Hi Neal,

On Wed, Sep 01, 2021 at 08:07:53AM +0200, Greg Kroah-Hartman wrote:
> On Wed, Sep 01, 2021 at 11:50:41AM +0800, neal_liu wrote:
> > Retitle.
> > 
> > For Aspeed, HCHalted status depends on not only Run/Stop but also
> > ASS/PSS status.
> > Handshake CMD_RUN on startup instead.
> > 
> > Signed-off-by: neal_liu <neal_liu@aspeedtech.com>
> > ---
> >  drivers/usb/host/ehci-hcd.c      | 11 ++++++++++-
> >  drivers/usb/host/ehci-platform.c |  6 ++++++
> >  drivers/usb/host/ehci.h          |  1 +
> >  3 files changed, 17 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
> > index 10b0365f3439..01c022e46aa2 100644
> > --- a/drivers/usb/host/ehci-hcd.c
> > +++ b/drivers/usb/host/ehci-hcd.c
> > @@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
> >  	/* Wait until HC become operational */
> >  	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes */
> >  	msleep(5);
> > -	rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
> > +
> > +	/* For Aspeed, STS_HALT also depends on ASS/PSS status.
> > +	 * Skip this check on startup.
> > +	 */
> > +	if (ehci->is_aspeed)
> > +		rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
> > +				    1, 100 * 1000);
> > +	else
> > +		rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
> > +				    0, 100 * 1000);
> >  
> >  	up_write(&ehci_cf_port_reset_rwsem);
> >  
> > diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
> > index c70f2d0b4aaf..c3dc906274d9 100644
> > --- a/drivers/usb/host/ehci-platform.c
> > +++ b/drivers/usb/host/ehci-platform.c
> > @@ -297,6 +297,12 @@ static int ehci_platform_probe(struct platform_device *dev)
> >  					  "has-transaction-translator"))
> >  			hcd->has_tt = 1;
> >  
> > +		if (of_device_is_compatible(dev->dev.of_node,
> > +					    "aspeed,ast2500-ehci") ||
> > +		    of_device_is_compatible(dev->dev.of_node,
> > +					    "aspeed,ast2600-ehci"))
> > +			ehci->is_aspeed = 1;
> > +
> >  		if (soc_device_match(quirk_poll_match))
> >  			priv->quirk_poll = true;
> >  
> > diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
> > index 80bb823aa9fe..fdd073cc053b 100644
> > --- a/drivers/usb/host/ehci.h
> > +++ b/drivers/usb/host/ehci.h
> > @@ -219,6 +219,7 @@ struct ehci_hcd {			/* one per controller */
> >  	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
> >  	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
> >  	unsigned		spurious_oc:1;
> > +	unsigned		is_aspeed:1;
> >  
> >  	/* required for usb32 quirk */
> >  	#define OHCI_CTRL_HCFS          (3 << 6)
> > -- 
> > 2.17.1
> > 
> 
> Hi,
> 
> This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
> a patch that has triggered this response.  He used to manually respond
> to these common problems, but in order to save his sanity (he kept
> writing the same thing over and over, yet to different people), I was
> created.  Hopefully you will not take offence and will fix the problem
> in your patch and resubmit it so that it can be accepted into the Linux
> kernel tree.
> 
> You are receiving this message because of the following common error(s)
> as indicated below:
> 
> - It looks like you did not use your "real" name for the patch on either
>   the Signed-off-by: line, or the From: line (both of which have to
>   match).  Please read the kernel file, Documentation/SubmittingPatches
>   for how to do this correctly.
> 
> - This looks like a new version of a previously submitted patch, but you
>   did not list below the --- line any changes from the previous version.
>   Please read the section entitled "The canonical patch format" in the
>   kernel file, Documentation/SubmittingPatches for what needs to be done
>   here to properly describe this.
> 
> If you wish to discuss this problem further, or you have questions about
> how to resolve this issue, please feel free to respond to this email and
> Greg will reply once he has dug out from the pending patches received
> from other developers.
> 
> thanks,
> 
> greg k-h's patch email bot

Thank you Neal for the patch. I tried the fix on my CMM (AST2500) and
Fuji (AST2600) BMC and it works on both platforms.

Can you please address Greg's comments above and send out a new version?
BTW, please don't forget to include Alan's Acked-by in the new version.

Reviewed-by: Tao Ren <rentao.bupt@gmail.com>
Tested-by: Tao Ren <rentao.bupt@gmail.com>


Cheers,

Tao

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

RE: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[Neal Liu]

> Hi Neal,
> 
> On Wed, Sep 01, 2021 at 08:07:53AM +0200, Greg Kroah-Hartman wrote:
> > On Wed, Sep 01, 2021 at 11:50:41AM +0800, neal_liu wrote:
> > > Retitle.
> > >
> > > For Aspeed, HCHalted status depends on not only Run/Stop but also
> > > ASS/PSS status.
> > > Handshake CMD_RUN on startup instead.
> > >
> > > Signed-off-by: neal_liu <neal_liu@aspeedtech.com>
> > > ---
> > >  drivers/usb/host/ehci-hcd.c      | 11 ++++++++++-
> > >  drivers/usb/host/ehci-platform.c |  6 ++++++
> > >  drivers/usb/host/ehci.h          |  1 +
> > >  3 files changed, 17 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/usb/host/ehci-hcd.c
> > > b/drivers/usb/host/ehci-hcd.c index 10b0365f3439..01c022e46aa2
> > > 100644
> > > --- a/drivers/usb/host/ehci-hcd.c
> > > +++ b/drivers/usb/host/ehci-hcd.c
> > > @@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
> > >  	/* Wait until HC become operational */
> > >  	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes
> */
> > >  	msleep(5);
> > > -	rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
> > > +
> > > +	/* For Aspeed, STS_HALT also depends on ASS/PSS status.
> > > +	 * Skip this check on startup.
> > > +	 */
> > > +	if (ehci->is_aspeed)
> > > +		rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
> > > +				    1, 100 * 1000);
> > > +	else
> > > +		rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
> > > +				    0, 100 * 1000);
> > >
> > >  	up_write(&ehci_cf_port_reset_rwsem);
> > >
> > > diff --git a/drivers/usb/host/ehci-platform.c
> > > b/drivers/usb/host/ehci-platform.c
> > > index c70f2d0b4aaf..c3dc906274d9 100644
> > > --- a/drivers/usb/host/ehci-platform.c
> > > +++ b/drivers/usb/host/ehci-platform.c
> > > @@ -297,6 +297,12 @@ static int ehci_platform_probe(struct
> platform_device *dev)
> > >  					  "has-transaction-translator"))
> > >  			hcd->has_tt = 1;
> > >
> > > +		if (of_device_is_compatible(dev->dev.of_node,
> > > +					    "aspeed,ast2500-ehci") ||
> > > +		    of_device_is_compatible(dev->dev.of_node,
> > > +					    "aspeed,ast2600-ehci"))
> > > +			ehci->is_aspeed = 1;
> > > +
> > >  		if (soc_device_match(quirk_poll_match))
> > >  			priv->quirk_poll = true;
> > >
> > > diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index
> > > 80bb823aa9fe..fdd073cc053b 100644
> > > --- a/drivers/usb/host/ehci.h
> > > +++ b/drivers/usb/host/ehci.h
> > > @@ -219,6 +219,7 @@ struct ehci_hcd {			/* one per
> controller */
> > >  	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
> > >  	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
> > >  	unsigned		spurious_oc:1;
> > > +	unsigned		is_aspeed:1;
> > >
> > >  	/* required for usb32 quirk */
> > >  	#define OHCI_CTRL_HCFS          (3 << 6)
> > > --
> > > 2.17.1
> > >
> >
> > Hi,
> >
> > This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent
> > him a patch that has triggered this response.  He used to manually
> > respond to these common problems, but in order to save his sanity (he
> > kept writing the same thing over and over, yet to different people), I
> > was created.  Hopefully you will not take offence and will fix the
> > problem in your patch and resubmit it so that it can be accepted into
> > the Linux kernel tree.
> >
> > You are receiving this message because of the following common
> > error(s) as indicated below:
> >
> > - It looks like you did not use your "real" name for the patch on either
> >   the Signed-off-by: line, or the From: line (both of which have to
> >   match).  Please read the kernel file, Documentation/SubmittingPatches
> >   for how to do this correctly.
> >
> > - This looks like a new version of a previously submitted patch, but you
> >   did not list below the --- line any changes from the previous version.
> >   Please read the section entitled "The canonical patch format" in the
> >   kernel file, Documentation/SubmittingPatches for what needs to be done
> >   here to properly describe this.
> >
> > If you wish to discuss this problem further, or you have questions
> > about how to resolve this issue, please feel free to respond to this
> > email and Greg will reply once he has dug out from the pending patches
> > received from other developers.
> >
> > thanks,
> >
> > greg k-h's patch email bot
> 
> Thank you Neal for the patch. I tried the fix on my CMM (AST2500) and Fuji
> (AST2600) BMC and it works on both platforms.
> 
> Can you please address Greg's comments above and send out a new version?
> BTW, please don't forget to include Alan's Acked-by in the new version.
> 
> Reviewed-by: Tao Ren <rentao.bupt@gmail.com>
> Tested-by: Tao Ren <rentao.bupt@gmail.com>
> 
> 
> Cheers,
> 
> Tao

Sure! I'll try to fix Greg's comments on next patch. I think the problem is the first one.
And thanks for your review & test.

-Neal

RE: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[Neal Liu]

> Hi Neal,
> 
> On Wed, Sep 01, 2021 at 08:07:53AM +0200, Greg Kroah-Hartman wrote:
> > On Wed, Sep 01, 2021 at 11:50:41AM +0800, neal_liu wrote:
> > > Retitle.
> > >
> > > For Aspeed, HCHalted status depends on not only Run/Stop but also
> > > ASS/PSS status.
> > > Handshake CMD_RUN on startup instead.
> > >
> > > Signed-off-by: neal_liu <neal_liu@aspeedtech.com>
> > > ---
> > >  drivers/usb/host/ehci-hcd.c      | 11 ++++++++++-
> > >  drivers/usb/host/ehci-platform.c |  6 ++++++
> > >  drivers/usb/host/ehci.h          |  1 +
> > >  3 files changed, 17 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/usb/host/ehci-hcd.c
> > > b/drivers/usb/host/ehci-hcd.c index 10b0365f3439..01c022e46aa2
> > > 100644
> > > --- a/drivers/usb/host/ehci-hcd.c
> > > +++ b/drivers/usb/host/ehci-hcd.c
> > > @@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
> > >  	/* Wait until HC become operational */
> > >  	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes
> */
> > >  	msleep(5);
> > > -	rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
> > > +
> > > +	/* For Aspeed, STS_HALT also depends on ASS/PSS status.
> > > +	 * Skip this check on startup.
> > > +	 */
> > > +	if (ehci->is_aspeed)
> > > +		rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
> > > +				    1, 100 * 1000);
> > > +	else
> > > +		rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
> > > +				    0, 100 * 1000);
> > >
> > >  	up_write(&ehci_cf_port_reset_rwsem);
> > >
> > > diff --git a/drivers/usb/host/ehci-platform.c
> > > b/drivers/usb/host/ehci-platform.c
> > > index c70f2d0b4aaf..c3dc906274d9 100644
> > > --- a/drivers/usb/host/ehci-platform.c
> > > +++ b/drivers/usb/host/ehci-platform.c
> > > @@ -297,6 +297,12 @@ static int ehci_platform_probe(struct
> platform_device *dev)
> > >  					  "has-transaction-translator"))
> > >  			hcd->has_tt = 1;
> > >
> > > +		if (of_device_is_compatible(dev->dev.of_node,
> > > +					    "aspeed,ast2500-ehci") ||
> > > +		    of_device_is_compatible(dev->dev.of_node,
> > > +					    "aspeed,ast2600-ehci"))
> > > +			ehci->is_aspeed = 1;
> > > +
> > >  		if (soc_device_match(quirk_poll_match))
> > >  			priv->quirk_poll = true;
> > >
> > > diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index
> > > 80bb823aa9fe..fdd073cc053b 100644
> > > --- a/drivers/usb/host/ehci.h
> > > +++ b/drivers/usb/host/ehci.h
> > > @@ -219,6 +219,7 @@ struct ehci_hcd {			/* one per
> controller */
> > >  	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
> > >  	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
> > >  	unsigned		spurious_oc:1;
> > > +	unsigned		is_aspeed:1;
> > >
> > >  	/* required for usb32 quirk */
> > >  	#define OHCI_CTRL_HCFS          (3 << 6)
> > > --
> > > 2.17.1
> > >
> >
> > Hi,
> >
> > This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent
> > him a patch that has triggered this response.  He used to manually
> > respond to these common problems, but in order to save his sanity (he
> > kept writing the same thing over and over, yet to different people), I
> > was created.  Hopefully you will not take offence and will fix the
> > problem in your patch and resubmit it so that it can be accepted into
> > the Linux kernel tree.
> >
> > You are receiving this message because of the following common
> > error(s) as indicated below:
> >
> > - It looks like you did not use your "real" name for the patch on either
> >   the Signed-off-by: line, or the From: line (both of which have to
> >   match).  Please read the kernel file, Documentation/SubmittingPatches
> >   for how to do this correctly.
> >
> > - This looks like a new version of a previously submitted patch, but you
> >   did not list below the --- line any changes from the previous version.
> >   Please read the section entitled "The canonical patch format" in the
> >   kernel file, Documentation/SubmittingPatches for what needs to be done
> >   here to properly describe this.
> >
> > If you wish to discuss this problem further, or you have questions
> > about how to resolve this issue, please feel free to respond to this
> > email and Greg will reply once he has dug out from the pending patches
> > received from other developers.
> >
> > thanks,
> >
> > greg k-h's patch email bot
> 
> Thank you Neal for the patch. I tried the fix on my CMM (AST2500) and Fuji
> (AST2600) BMC and it works on both platforms.
> 
> Can you please address Greg's comments above and send out a new version?
> BTW, please don't forget to include Alan's Acked-by in the new version.
> 
> Reviewed-by: Tao Ren <rentao.bupt@gmail.com>
> Tested-by: Tao Ren <rentao.bupt@gmail.com>
> 
> 
> Cheers,
> 
> Tao

Sure! I'll try to fix Greg's comments on next patch. I think the problem is the first one.
And thanks for your review & test.

-Neal


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[Greg Kroah-Hartman]

On Thu, Sep 09, 2021 at 06:23:10AM +0000, Neal Liu wrote:
> 
> > Hi Neal,
> > 
> > On Wed, Sep 01, 2021 at 08:07:53AM +0200, Greg Kroah-Hartman wrote:
> > > On Wed, Sep 01, 2021 at 11:50:41AM +0800, neal_liu wrote:
> > > > Retitle.
> > > >
> > > > For Aspeed, HCHalted status depends on not only Run/Stop but also
> > > > ASS/PSS status.
> > > > Handshake CMD_RUN on startup instead.
> > > >
> > > > Signed-off-by: neal_liu <neal_liu@aspeedtech.com>
> > > > ---
> > > >  drivers/usb/host/ehci-hcd.c      | 11 ++++++++++-
> > > >  drivers/usb/host/ehci-platform.c |  6 ++++++
> > > >  drivers/usb/host/ehci.h          |  1 +
> > > >  3 files changed, 17 insertions(+), 1 deletion(-)
> > > >
> > > > diff --git a/drivers/usb/host/ehci-hcd.c
> > > > b/drivers/usb/host/ehci-hcd.c index 10b0365f3439..01c022e46aa2
> > > > 100644
> > > > --- a/drivers/usb/host/ehci-hcd.c
> > > > +++ b/drivers/usb/host/ehci-hcd.c
> > > > @@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
> > > >  	/* Wait until HC become operational */
> > > >  	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes
> > */
> > > >  	msleep(5);
> > > > -	rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
> > > > +
> > > > +	/* For Aspeed, STS_HALT also depends on ASS/PSS status.
> > > > +	 * Skip this check on startup.
> > > > +	 */
> > > > +	if (ehci->is_aspeed)
> > > > +		rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
> > > > +				    1, 100 * 1000);
> > > > +	else
> > > > +		rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
> > > > +				    0, 100 * 1000);
> > > >
> > > >  	up_write(&ehci_cf_port_reset_rwsem);
> > > >
> > > > diff --git a/drivers/usb/host/ehci-platform.c
> > > > b/drivers/usb/host/ehci-platform.c
> > > > index c70f2d0b4aaf..c3dc906274d9 100644
> > > > --- a/drivers/usb/host/ehci-platform.c
> > > > +++ b/drivers/usb/host/ehci-platform.c
> > > > @@ -297,6 +297,12 @@ static int ehci_platform_probe(struct
> > platform_device *dev)
> > > >  					  "has-transaction-translator"))
> > > >  			hcd->has_tt = 1;
> > > >
> > > > +		if (of_device_is_compatible(dev->dev.of_node,
> > > > +					    "aspeed,ast2500-ehci") ||
> > > > +		    of_device_is_compatible(dev->dev.of_node,
> > > > +					    "aspeed,ast2600-ehci"))
> > > > +			ehci->is_aspeed = 1;
> > > > +
> > > >  		if (soc_device_match(quirk_poll_match))
> > > >  			priv->quirk_poll = true;
> > > >
> > > > diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index
> > > > 80bb823aa9fe..fdd073cc053b 100644
> > > > --- a/drivers/usb/host/ehci.h
> > > > +++ b/drivers/usb/host/ehci.h
> > > > @@ -219,6 +219,7 @@ struct ehci_hcd {			/* one per
> > controller */
> > > >  	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
> > > >  	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
> > > >  	unsigned		spurious_oc:1;
> > > > +	unsigned		is_aspeed:1;
> > > >
> > > >  	/* required for usb32 quirk */
> > > >  	#define OHCI_CTRL_HCFS          (3 << 6)
> > > > --
> > > > 2.17.1
> > > >
> > >
> > > Hi,
> > >
> > > This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent
> > > him a patch that has triggered this response.  He used to manually
> > > respond to these common problems, but in order to save his sanity (he
> > > kept writing the same thing over and over, yet to different people), I
> > > was created.  Hopefully you will not take offence and will fix the
> > > problem in your patch and resubmit it so that it can be accepted into
> > > the Linux kernel tree.
> > >
> > > You are receiving this message because of the following common
> > > error(s) as indicated below:
> > >
> > > - It looks like you did not use your "real" name for the patch on either
> > >   the Signed-off-by: line, or the From: line (both of which have to
> > >   match).  Please read the kernel file, Documentation/SubmittingPatches
> > >   for how to do this correctly.
> > >
> > > - This looks like a new version of a previously submitted patch, but you
> > >   did not list below the --- line any changes from the previous version.
> > >   Please read the section entitled "The canonical patch format" in the
> > >   kernel file, Documentation/SubmittingPatches for what needs to be done
> > >   here to properly describe this.
> > >
> > > If you wish to discuss this problem further, or you have questions
> > > about how to resolve this issue, please feel free to respond to this
> > > email and Greg will reply once he has dug out from the pending patches
> > > received from other developers.
> > >
> > > thanks,
> > >
> > > greg k-h's patch email bot
> > 
> > Thank you Neal for the patch. I tried the fix on my CMM (AST2500) and Fuji
> > (AST2600) BMC and it works on both platforms.
> > 
> > Can you please address Greg's comments above and send out a new version?
> > BTW, please don't forget to include Alan's Acked-by in the new version.
> > 
> > Reviewed-by: Tao Ren <rentao.bupt@gmail.com>
> > Tested-by: Tao Ren <rentao.bupt@gmail.com>
> > 
> > 
> > Cheers,
> > 
> > Tao
> 
> Sure! I'll try to fix Greg's comments on next patch. I think the problem is the first one.
> And thanks for your review & test.

Both problems are real, please fix them.

Re: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[Greg Kroah-Hartman]

On Thu, Sep 09, 2021 at 06:23:10AM +0000, Neal Liu wrote:
> 
> > Hi Neal,
> > 
> > On Wed, Sep 01, 2021 at 08:07:53AM +0200, Greg Kroah-Hartman wrote:
> > > On Wed, Sep 01, 2021 at 11:50:41AM +0800, neal_liu wrote:
> > > > Retitle.
> > > >
> > > > For Aspeed, HCHalted status depends on not only Run/Stop but also
> > > > ASS/PSS status.
> > > > Handshake CMD_RUN on startup instead.
> > > >
> > > > Signed-off-by: neal_liu <neal_liu@aspeedtech.com>
> > > > ---
> > > >  drivers/usb/host/ehci-hcd.c      | 11 ++++++++++-
> > > >  drivers/usb/host/ehci-platform.c |  6 ++++++
> > > >  drivers/usb/host/ehci.h          |  1 +
> > > >  3 files changed, 17 insertions(+), 1 deletion(-)
> > > >
> > > > diff --git a/drivers/usb/host/ehci-hcd.c
> > > > b/drivers/usb/host/ehci-hcd.c index 10b0365f3439..01c022e46aa2
> > > > 100644
> > > > --- a/drivers/usb/host/ehci-hcd.c
> > > > +++ b/drivers/usb/host/ehci-hcd.c
> > > > @@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
> > > >  	/* Wait until HC become operational */
> > > >  	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes
> > */
> > > >  	msleep(5);
> > > > -	rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000);
> > > > +
> > > > +	/* For Aspeed, STS_HALT also depends on ASS/PSS status.
> > > > +	 * Skip this check on startup.
> > > > +	 */
> > > > +	if (ehci->is_aspeed)
> > > > +		rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
> > > > +				    1, 100 * 1000);
> > > > +	else
> > > > +		rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
> > > > +				    0, 100 * 1000);
> > > >
> > > >  	up_write(&ehci_cf_port_reset_rwsem);
> > > >
> > > > diff --git a/drivers/usb/host/ehci-platform.c
> > > > b/drivers/usb/host/ehci-platform.c
> > > > index c70f2d0b4aaf..c3dc906274d9 100644
> > > > --- a/drivers/usb/host/ehci-platform.c
> > > > +++ b/drivers/usb/host/ehci-platform.c
> > > > @@ -297,6 +297,12 @@ static int ehci_platform_probe(struct
> > platform_device *dev)
> > > >  					  "has-transaction-translator"))
> > > >  			hcd->has_tt = 1;
> > > >
> > > > +		if (of_device_is_compatible(dev->dev.of_node,
> > > > +					    "aspeed,ast2500-ehci") ||
> > > > +		    of_device_is_compatible(dev->dev.of_node,
> > > > +					    "aspeed,ast2600-ehci"))
> > > > +			ehci->is_aspeed = 1;
> > > > +
> > > >  		if (soc_device_match(quirk_poll_match))
> > > >  			priv->quirk_poll = true;
> > > >
> > > > diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index
> > > > 80bb823aa9fe..fdd073cc053b 100644
> > > > --- a/drivers/usb/host/ehci.h
> > > > +++ b/drivers/usb/host/ehci.h
> > > > @@ -219,6 +219,7 @@ struct ehci_hcd {			/* one per
> > controller */
> > > >  	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
> > > >  	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
> > > >  	unsigned		spurious_oc:1;
> > > > +	unsigned		is_aspeed:1;
> > > >
> > > >  	/* required for usb32 quirk */
> > > >  	#define OHCI_CTRL_HCFS          (3 << 6)
> > > > --
> > > > 2.17.1
> > > >
> > >
> > > Hi,
> > >
> > > This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent
> > > him a patch that has triggered this response.  He used to manually
> > > respond to these common problems, but in order to save his sanity (he
> > > kept writing the same thing over and over, yet to different people), I
> > > was created.  Hopefully you will not take offence and will fix the
> > > problem in your patch and resubmit it so that it can be accepted into
> > > the Linux kernel tree.
> > >
> > > You are receiving this message because of the following common
> > > error(s) as indicated below:
> > >
> > > - It looks like you did not use your "real" name for the patch on either
> > >   the Signed-off-by: line, or the From: line (both of which have to
> > >   match).  Please read the kernel file, Documentation/SubmittingPatches
> > >   for how to do this correctly.
> > >
> > > - This looks like a new version of a previously submitted patch, but you
> > >   did not list below the --- line any changes from the previous version.
> > >   Please read the section entitled "The canonical patch format" in the
> > >   kernel file, Documentation/SubmittingPatches for what needs to be done
> > >   here to properly describe this.
> > >
> > > If you wish to discuss this problem further, or you have questions
> > > about how to resolve this issue, please feel free to respond to this
> > > email and Greg will reply once he has dug out from the pending patches
> > > received from other developers.
> > >
> > > thanks,
> > >
> > > greg k-h's patch email bot
> > 
> > Thank you Neal for the patch. I tried the fix on my CMM (AST2500) and Fuji
> > (AST2600) BMC and it works on both platforms.
> > 
> > Can you please address Greg's comments above and send out a new version?
> > BTW, please don't forget to include Alan's Acked-by in the new version.
> > 
> > Reviewed-by: Tao Ren <rentao.bupt@gmail.com>
> > Tested-by: Tao Ren <rentao.bupt@gmail.com>
> > 
> > 
> > Cheers,
> > 
> > Tao
> 
> Sure! I'll try to fix Greg's comments on next patch. I think the problem is the first one.
> And thanks for your review & test.

Both problems are real, please fix them.

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

RE: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[Neal Liu]

> -----Original Message-----
> From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Sent: Thursday, September 9, 2021 2:39 PM
> To: Neal Liu <neal_liu@aspeedtech.com>
> Cc: Tao Ren <rentao.bupt@gmail.com>; Alan Stern
> <stern@rowland.harvard.edu>; Tony Prisk <linux@prisktech.co.nz>;
> linux-usb@vger.kernel.org; linux-kernel@vger.kernel.org;
> linux-arm-kernel@lists.infradead.org; BMC-SW <BMC-SW@aspeedtech.com>
> Subject: Re: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT
> 
> On Thu, Sep 09, 2021 at 06:23:10AM +0000, Neal Liu wrote:
> >
> > > Hi Neal,
> > >
> > > On Wed, Sep 01, 2021 at 08:07:53AM +0200, Greg Kroah-Hartman wrote:
> > > > On Wed, Sep 01, 2021 at 11:50:41AM +0800, neal_liu wrote:
> > > > > Retitle.
> > > > >
> > > > > For Aspeed, HCHalted status depends on not only Run/Stop but
> > > > > also ASS/PSS status.
> > > > > Handshake CMD_RUN on startup instead.
> > > > >
> > > > > Signed-off-by: neal_liu <neal_liu@aspeedtech.com>
> > > > > ---
> > > > >  drivers/usb/host/ehci-hcd.c      | 11 ++++++++++-
> > > > >  drivers/usb/host/ehci-platform.c |  6 ++++++
> > > > >  drivers/usb/host/ehci.h          |  1 +
> > > > >  3 files changed, 17 insertions(+), 1 deletion(-)
> > > > >
> > > > > diff --git a/drivers/usb/host/ehci-hcd.c
> > > > > b/drivers/usb/host/ehci-hcd.c index 10b0365f3439..01c022e46aa2
> > > > > 100644
> > > > > --- a/drivers/usb/host/ehci-hcd.c
> > > > > +++ b/drivers/usb/host/ehci-hcd.c
> > > > > @@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
> > > > >  	/* Wait until HC become operational */
> > > > >  	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes
> > > */
> > > > >  	msleep(5);
> > > > > -	rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 *
> 1000);
> > > > > +
> > > > > +	/* For Aspeed, STS_HALT also depends on ASS/PSS status.
> > > > > +	 * Skip this check on startup.
> > > > > +	 */
> > > > > +	if (ehci->is_aspeed)
> > > > > +		rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
> > > > > +				    1, 100 * 1000);
> > > > > +	else
> > > > > +		rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
> > > > > +				    0, 100 * 1000);
> > > > >
> > > > >  	up_write(&ehci_cf_port_reset_rwsem);
> > > > >
> > > > > diff --git a/drivers/usb/host/ehci-platform.c
> > > > > b/drivers/usb/host/ehci-platform.c
> > > > > index c70f2d0b4aaf..c3dc906274d9 100644
> > > > > --- a/drivers/usb/host/ehci-platform.c
> > > > > +++ b/drivers/usb/host/ehci-platform.c
> > > > > @@ -297,6 +297,12 @@ static int ehci_platform_probe(struct
> > > platform_device *dev)
> > > > >  					  "has-transaction-translator"))
> > > > >  			hcd->has_tt = 1;
> > > > >
> > > > > +		if (of_device_is_compatible(dev->dev.of_node,
> > > > > +					    "aspeed,ast2500-ehci") ||
> > > > > +		    of_device_is_compatible(dev->dev.of_node,
> > > > > +					    "aspeed,ast2600-ehci"))
> > > > > +			ehci->is_aspeed = 1;
> > > > > +
> > > > >  		if (soc_device_match(quirk_poll_match))
> > > > >  			priv->quirk_poll = true;
> > > > >
> > > > > diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
> > > > > index 80bb823aa9fe..fdd073cc053b 100644
> > > > > --- a/drivers/usb/host/ehci.h
> > > > > +++ b/drivers/usb/host/ehci.h
> > > > > @@ -219,6 +219,7 @@ struct ehci_hcd {			/* one per
> > > controller */
> > > > >  	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
> > > > >  	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
> > > > >  	unsigned		spurious_oc:1;
> > > > > +	unsigned		is_aspeed:1;
> > > > >
> > > > >  	/* required for usb32 quirk */
> > > > >  	#define OHCI_CTRL_HCFS          (3 << 6)
> > > > > --
> > > > > 2.17.1
> > > > >
> > > >
> > > > Hi,
> > > >
> > > > This is the friendly patch-bot of Greg Kroah-Hartman.  You have
> > > > sent him a patch that has triggered this response.  He used to
> > > > manually respond to these common problems, but in order to save
> > > > his sanity (he kept writing the same thing over and over, yet to
> > > > different people), I was created.  Hopefully you will not take
> > > > offence and will fix the problem in your patch and resubmit it so
> > > > that it can be accepted into the Linux kernel tree.
> > > >
> > > > You are receiving this message because of the following common
> > > > error(s) as indicated below:
> > > >
> > > > - It looks like you did not use your "real" name for the patch on either
> > > >   the Signed-off-by: line, or the From: line (both of which have to
> > > >   match).  Please read the kernel file,
> Documentation/SubmittingPatches
> > > >   for how to do this correctly.
> > > >
> > > > - This looks like a new version of a previously submitted patch, but you
> > > >   did not list below the --- line any changes from the previous version.
> > > >   Please read the section entitled "The canonical patch format" in the
> > > >   kernel file, Documentation/SubmittingPatches for what needs to be
> done
> > > >   here to properly describe this.
> > > >
> > > > If you wish to discuss this problem further, or you have questions
> > > > about how to resolve this issue, please feel free to respond to
> > > > this email and Greg will reply once he has dug out from the
> > > > pending patches received from other developers.
> > > >
> > > > thanks,
> > > >
> > > > greg k-h's patch email bot
> > >
> > > Thank you Neal for the patch. I tried the fix on my CMM (AST2500)
> > > and Fuji
> > > (AST2600) BMC and it works on both platforms.
> > >
> > > Can you please address Greg's comments above and send out a new
> version?
> > > BTW, please don't forget to include Alan's Acked-by in the new version.
> > >
> > > Reviewed-by: Tao Ren <rentao.bupt@gmail.com>
> > > Tested-by: Tao Ren <rentao.bupt@gmail.com>
> > >
> > >
> > > Cheers,
> > >
> > > Tao
> >
> > Sure! I'll try to fix Greg's comments on next patch. I think the problem is the
> first one.
> > And thanks for your review & test.
> 
> Both problems are real, please fix them.

Thanks for pointing out.

RE: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT

[Neal Liu]

> -----Original Message-----
> From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Sent: Thursday, September 9, 2021 2:39 PM
> To: Neal Liu <neal_liu@aspeedtech.com>
> Cc: Tao Ren <rentao.bupt@gmail.com>; Alan Stern
> <stern@rowland.harvard.edu>; Tony Prisk <linux@prisktech.co.nz>;
> linux-usb@vger.kernel.org; linux-kernel@vger.kernel.org;
> linux-arm-kernel@lists.infradead.org; BMC-SW <BMC-SW@aspeedtech.com>
> Subject: Re: [PATCH v2] usb: ehci: handshake CMD_RUN instead of STS_HALT
> 
> On Thu, Sep 09, 2021 at 06:23:10AM +0000, Neal Liu wrote:
> >
> > > Hi Neal,
> > >
> > > On Wed, Sep 01, 2021 at 08:07:53AM +0200, Greg Kroah-Hartman wrote:
> > > > On Wed, Sep 01, 2021 at 11:50:41AM +0800, neal_liu wrote:
> > > > > Retitle.
> > > > >
> > > > > For Aspeed, HCHalted status depends on not only Run/Stop but
> > > > > also ASS/PSS status.
> > > > > Handshake CMD_RUN on startup instead.
> > > > >
> > > > > Signed-off-by: neal_liu <neal_liu@aspeedtech.com>
> > > > > ---
> > > > >  drivers/usb/host/ehci-hcd.c      | 11 ++++++++++-
> > > > >  drivers/usb/host/ehci-platform.c |  6 ++++++
> > > > >  drivers/usb/host/ehci.h          |  1 +
> > > > >  3 files changed, 17 insertions(+), 1 deletion(-)
> > > > >
> > > > > diff --git a/drivers/usb/host/ehci-hcd.c
> > > > > b/drivers/usb/host/ehci-hcd.c index 10b0365f3439..01c022e46aa2
> > > > > 100644
> > > > > --- a/drivers/usb/host/ehci-hcd.c
> > > > > +++ b/drivers/usb/host/ehci-hcd.c
> > > > > @@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd)
> > > > >  	/* Wait until HC become operational */
> > > > >  	ehci_readl(ehci, &ehci->regs->command);	/* unblock posted writes
> > > */
> > > > >  	msleep(5);
> > > > > -	rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 *
> 1000);
> > > > > +
> > > > > +	/* For Aspeed, STS_HALT also depends on ASS/PSS status.
> > > > > +	 * Skip this check on startup.
> > > > > +	 */
> > > > > +	if (ehci->is_aspeed)
> > > > > +		rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN,
> > > > > +				    1, 100 * 1000);
> > > > > +	else
> > > > > +		rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT,
> > > > > +				    0, 100 * 1000);
> > > > >
> > > > >  	up_write(&ehci_cf_port_reset_rwsem);
> > > > >
> > > > > diff --git a/drivers/usb/host/ehci-platform.c
> > > > > b/drivers/usb/host/ehci-platform.c
> > > > > index c70f2d0b4aaf..c3dc906274d9 100644
> > > > > --- a/drivers/usb/host/ehci-platform.c
> > > > > +++ b/drivers/usb/host/ehci-platform.c
> > > > > @@ -297,6 +297,12 @@ static int ehci_platform_probe(struct
> > > platform_device *dev)
> > > > >  					  "has-transaction-translator"))
> > > > >  			hcd->has_tt = 1;
> > > > >
> > > > > +		if (of_device_is_compatible(dev->dev.of_node,
> > > > > +					    "aspeed,ast2500-ehci") ||
> > > > > +		    of_device_is_compatible(dev->dev.of_node,
> > > > > +					    "aspeed,ast2600-ehci"))
> > > > > +			ehci->is_aspeed = 1;
> > > > > +
> > > > >  		if (soc_device_match(quirk_poll_match))
> > > > >  			priv->quirk_poll = true;
> > > > >
> > > > > diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
> > > > > index 80bb823aa9fe..fdd073cc053b 100644
> > > > > --- a/drivers/usb/host/ehci.h
> > > > > +++ b/drivers/usb/host/ehci.h
> > > > > @@ -219,6 +219,7 @@ struct ehci_hcd {			/* one per
> > > controller */
> > > > >  	unsigned		need_oc_pp_cycle:1; /* MPC834X port power */
> > > > >  	unsigned		imx28_write_fix:1; /* For Freescale i.MX28 */
> > > > >  	unsigned		spurious_oc:1;
> > > > > +	unsigned		is_aspeed:1;
> > > > >
> > > > >  	/* required for usb32 quirk */
> > > > >  	#define OHCI_CTRL_HCFS          (3 << 6)
> > > > > --
> > > > > 2.17.1
> > > > >
> > > >
> > > > Hi,
> > > >
> > > > This is the friendly patch-bot of Greg Kroah-Hartman.  You have
> > > > sent him a patch that has triggered this response.  He used to
> > > > manually respond to these common problems, but in order to save
> > > > his sanity (he kept writing the same thing over and over, yet to
> > > > different people), I was created.  Hopefully you will not take
> > > > offence and will fix the problem in your patch and resubmit it so
> > > > that it can be accepted into the Linux kernel tree.
> > > >
> > > > You are receiving this message because of the following common
> > > > error(s) as indicated below:
> > > >
> > > > - It looks like you did not use your "real" name for the patch on either
> > > >   the Signed-off-by: line, or the From: line (both of which have to
> > > >   match).  Please read the kernel file,
> Documentation/SubmittingPatches
> > > >   for how to do this correctly.
> > > >
> > > > - This looks like a new version of a previously submitted patch, but you
> > > >   did not list below the --- line any changes from the previous version.
> > > >   Please read the section entitled "The canonical patch format" in the
> > > >   kernel file, Documentation/SubmittingPatches for what needs to be
> done
> > > >   here to properly describe this.
> > > >
> > > > If you wish to discuss this problem further, or you have questions
> > > > about how to resolve this issue, please feel free to respond to
> > > > this email and Greg will reply once he has dug out from the
> > > > pending patches received from other developers.
> > > >
> > > > thanks,
> > > >
> > > > greg k-h's patch email bot
> > >
> > > Thank you Neal for the patch. I tried the fix on my CMM (AST2500)
> > > and Fuji
> > > (AST2600) BMC and it works on both platforms.
> > >
> > > Can you please address Greg's comments above and send out a new
> version?
> > > BTW, please don't forget to include Alan's Acked-by in the new version.
> > >
> > > Reviewed-by: Tao Ren <rentao.bupt@gmail.com>
> > > Tested-by: Tao Ren <rentao.bupt@gmail.com>
> > >
> > >
> > > Cheers,
> > >
> > > Tao
> >
> > Sure! I'll try to fix Greg's comments on next patch. I think the problem is the
> first one.
> > And thanks for your review & test.
> 
> Both problems are real, please fix them.

Thanks for pointing out.

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