[v2,3/4] usb: musb: Extract set toggle as a separate interface
diff mbox series

Message ID 1547516626-5084-4-git-send-email-min.guo@mediatek.com
State New
Headers show
Series
  • Add MediaTek MUSB Controller Driver
Related show

Commit Message

Min Guo Jan. 15, 2019, 1:43 a.m. UTC
From: Min Guo <min.guo@mediatek.com>

Add a common interface for set data toggle

Signed-off-by: Min Guo <min.guo@mediatek.com>
---
 drivers/usb/musb/musb_host.c | 37 +++++++++++++++++++++++--------------
 1 file changed, 23 insertions(+), 14 deletions(-)

Comments

Matthias Brugger Jan. 15, 2019, 3:19 p.m. UTC | #1
On 15/01/2019 02:43, min.guo@mediatek.com wrote:
> From: Min Guo <min.guo@mediatek.com>
> 
> Add a common interface for set data toggle
> 
> Signed-off-by: Min Guo <min.guo@mediatek.com>
> ---
>  drivers/usb/musb/musb_host.c | 37 +++++++++++++++++++++++--------------
>  1 file changed, 23 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
> index b59ce9a..16d0ba4 100644
> --- a/drivers/usb/musb/musb_host.c
> +++ b/drivers/usb/musb/musb_host.c
> @@ -306,6 +306,25 @@ static inline void musb_save_toggle(struct musb_qh *qh, int is_in,
>  	usb_settoggle(urb->dev, qh->epnum, !is_in, csr ? 1 : 0);
>  }
>  
> +static inline u16 musb_set_toggle(struct musb_qh *qh, int is_in,
> +	struct urb *urb)
> +{
> +	u16 csr = 0;
> +	u16 toggle = 0;
> +
> +	toggle = usb_gettoggle(urb->dev, qh->epnum, !is_in);
> +
> +	if (is_in)
> +		csr = toggle ? (MUSB_RXCSR_H_WR_DATATOGGLE
> +				| MUSB_RXCSR_H_DATATOGGLE) : 0;
> +	else
> +		csr = toggle ? (MUSB_TXCSR_H_WR_DATATOGGLE
> +				| MUSB_TXCSR_H_DATATOGGLE)
> +				: MUSB_TXCSR_CLRDATATOG;

Can we switch the if and use is_out logic as function parameter. This would make
the code easier to understand.

Regards,
Matthias

> +
> +	return csr;
> +}
> +
>  /*
>   * Advance this hardware endpoint's queue, completing the specified URB and
>   * advancing to either the next URB queued to that qh, or else invalidating
> @@ -772,13 +791,8 @@ static void musb_ep_program(struct musb *musb, u8 epnum,
>  					);
>  			csr |= MUSB_TXCSR_MODE;
>  
> -			if (!hw_ep->tx_double_buffered) {
> -				if (usb_gettoggle(urb->dev, qh->epnum, 1))
> -					csr |= MUSB_TXCSR_H_WR_DATATOGGLE
> -						| MUSB_TXCSR_H_DATATOGGLE;
> -				else
> -					csr |= MUSB_TXCSR_CLRDATATOG;
> -			}
> +			if (!hw_ep->tx_double_buffered)
> +				csr |= musb_set_toggle(qh, !is_out, urb);
>  
>  			musb_writew(epio, MUSB_TXCSR, csr);
>  			/* REVISIT may need to clear FLUSHFIFO ... */
> @@ -860,17 +874,12 @@ static void musb_ep_program(struct musb *musb, u8 epnum,
>  
>  	/* IN/receive */
>  	} else {
> -		u16	csr;
> +		u16 csr = 0;
>  
>  		if (hw_ep->rx_reinit) {
>  			musb_rx_reinit(musb, qh, epnum);
> +			csr |= musb_set_toggle(qh, !is_out, urb);
>  
> -			/* init new state: toggle and NYET, maybe DMA later */
> -			if (usb_gettoggle(urb->dev, qh->epnum, 0))
> -				csr = MUSB_RXCSR_H_WR_DATATOGGLE
> -					| MUSB_RXCSR_H_DATATOGGLE;
> -			else
> -				csr = 0;
>  			if (qh->type == USB_ENDPOINT_XFER_INT)
>  				csr |= MUSB_RXCSR_DISNYET;
>  
>
Bin Liu Jan. 15, 2019, 8:40 p.m. UTC | #2
Hi Min,

On Tue, Jan 15, 2019 at 04:19:42PM +0100, Matthias Brugger wrote:
> 
> 
> On 15/01/2019 02:43, min.guo@mediatek.com wrote:
> > From: Min Guo <min.guo@mediatek.com>
> > 
> > Add a common interface for set data toggle
> > 
> > Signed-off-by: Min Guo <min.guo@mediatek.com>
> > ---
> >  drivers/usb/musb/musb_host.c | 37 +++++++++++++++++++++++--------------
> >  1 file changed, 23 insertions(+), 14 deletions(-)
> > 
> > diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
> > index b59ce9a..16d0ba4 100644
> > --- a/drivers/usb/musb/musb_host.c
> > +++ b/drivers/usb/musb/musb_host.c
> > @@ -306,6 +306,25 @@ static inline void musb_save_toggle(struct musb_qh *qh, int is_in,
> >  	usb_settoggle(urb->dev, qh->epnum, !is_in, csr ? 1 : 0);
> >  }
> >  
> > +static inline u16 musb_set_toggle(struct musb_qh *qh, int is_in,
> > +	struct urb *urb)
> > +{
> > +	u16 csr = 0;
> > +	u16 toggle = 0;
> > +
> > +	toggle = usb_gettoggle(urb->dev, qh->epnum, !is_in);
> > +
> > +	if (is_in)
> > +		csr = toggle ? (MUSB_RXCSR_H_WR_DATATOGGLE
> > +				| MUSB_RXCSR_H_DATATOGGLE) : 0;
> > +	else
> > +		csr = toggle ? (MUSB_TXCSR_H_WR_DATATOGGLE
> > +				| MUSB_TXCSR_H_DATATOGGLE)
> > +				: MUSB_TXCSR_CLRDATATOG;
> 
> Can we switch the if and use is_out logic as function parameter. This would make
> the code easier to understand.

based on the current implementation in patch 4/4, I don't think we need
this separate patch any more, but Matthias' comments still apply.

Regards,
-Bin.
Min Guo Jan. 16, 2019, 2:43 a.m. UTC | #3
Hi Bin,

On Tue, 2019-01-15 at 14:40 -0600, Bin Liu wrote:
> Hi Min,
> 
> On Tue, Jan 15, 2019 at 04:19:42PM +0100, Matthias Brugger wrote:
> > 
> > 
> > On 15/01/2019 02:43, min.guo@mediatek.com wrote:
> > > From: Min Guo <min.guo@mediatek.com>
> > > 
> > > Add a common interface for set data toggle
> > > 
> > > Signed-off-by: Min Guo <min.guo@mediatek.com>
> > > ---
> > >  drivers/usb/musb/musb_host.c | 37 +++++++++++++++++++++++--------------
> > >  1 file changed, 23 insertions(+), 14 deletions(-)
> > > 
> > > diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
> > > index b59ce9a..16d0ba4 100644
> > > --- a/drivers/usb/musb/musb_host.c
> > > +++ b/drivers/usb/musb/musb_host.c
> > > @@ -306,6 +306,25 @@ static inline void musb_save_toggle(struct musb_qh *qh, int is_in,
> > >  	usb_settoggle(urb->dev, qh->epnum, !is_in, csr ? 1 : 0);
> > >  }
> > >  
> > > +static inline u16 musb_set_toggle(struct musb_qh *qh, int is_in,
> > > +	struct urb *urb)
> > > +{
> > > +	u16 csr = 0;
> > > +	u16 toggle = 0;
> > > +
> > > +	toggle = usb_gettoggle(urb->dev, qh->epnum, !is_in);
> > > +
> > > +	if (is_in)
> > > +		csr = toggle ? (MUSB_RXCSR_H_WR_DATATOGGLE
> > > +				| MUSB_RXCSR_H_DATATOGGLE) : 0;
> > > +	else
> > > +		csr = toggle ? (MUSB_TXCSR_H_WR_DATATOGGLE
> > > +				| MUSB_TXCSR_H_DATATOGGLE)
> > > +				: MUSB_TXCSR_CLRDATATOG;
> > 
> > Can we switch the if and use is_out logic as function parameter. This would make
> > the code easier to understand.
> 
> based on the current implementation in patch 4/4, I don't think we need
> this separate patch any more, but Matthias' comments still apply.

Okay.

> Regards,
> -Bin.
Min Guo Jan. 16, 2019, 2:44 a.m. UTC | #4
Hi Matthias,

On Tue, 2019-01-15 at 16:19 +0100, Matthias Brugger wrote:
> 
> On 15/01/2019 02:43, min.guo@mediatek.com wrote:
> > From: Min Guo <min.guo@mediatek.com>
> > 
> > Add a common interface for set data toggle
> > 
> > Signed-off-by: Min Guo <min.guo@mediatek.com>
> > ---
> >  drivers/usb/musb/musb_host.c | 37 +++++++++++++++++++++++--------------
> >  1 file changed, 23 insertions(+), 14 deletions(-)
> > 
> > diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
> > index b59ce9a..16d0ba4 100644
> > --- a/drivers/usb/musb/musb_host.c
> > +++ b/drivers/usb/musb/musb_host.c
> > @@ -306,6 +306,25 @@ static inline void musb_save_toggle(struct musb_qh *qh, int is_in,
> >  	usb_settoggle(urb->dev, qh->epnum, !is_in, csr ? 1 : 0);
> >  }
> >  
> > +static inline u16 musb_set_toggle(struct musb_qh *qh, int is_in,
> > +	struct urb *urb)
> > +{
> > +	u16 csr = 0;
> > +	u16 toggle = 0;
> > +
> > +	toggle = usb_gettoggle(urb->dev, qh->epnum, !is_in);
> > +
> > +	if (is_in)
> > +		csr = toggle ? (MUSB_RXCSR_H_WR_DATATOGGLE
> > +				| MUSB_RXCSR_H_DATATOGGLE) : 0;
> > +	else
> > +		csr = toggle ? (MUSB_TXCSR_H_WR_DATATOGGLE
> > +				| MUSB_TXCSR_H_DATATOGGLE)
> > +				: MUSB_TXCSR_CLRDATATOG;
> 
> Can we switch the if and use is_out logic as function parameter. This would make
> the code easier to understand.

Okay.

> Regards,
> Matthias
> 
> > +
> > +	return csr;
> > +}
> > +
> >  /*
> >   * Advance this hardware endpoint's queue, completing the specified URB and
> >   * advancing to either the next URB queued to that qh, or else invalidating
> > @@ -772,13 +791,8 @@ static void musb_ep_program(struct musb *musb, u8 epnum,
> >  					);
> >  			csr |= MUSB_TXCSR_MODE;
> >  
> > -			if (!hw_ep->tx_double_buffered) {
> > -				if (usb_gettoggle(urb->dev, qh->epnum, 1))
> > -					csr |= MUSB_TXCSR_H_WR_DATATOGGLE
> > -						| MUSB_TXCSR_H_DATATOGGLE;
> > -				else
> > -					csr |= MUSB_TXCSR_CLRDATATOG;
> > -			}
> > +			if (!hw_ep->tx_double_buffered)
> > +				csr |= musb_set_toggle(qh, !is_out, urb);
> >  
> >  			musb_writew(epio, MUSB_TXCSR, csr);
> >  			/* REVISIT may need to clear FLUSHFIFO ... */
> > @@ -860,17 +874,12 @@ static void musb_ep_program(struct musb *musb, u8 epnum,
> >  
> >  	/* IN/receive */
> >  	} else {
> > -		u16	csr;
> > +		u16 csr = 0;
> >  
> >  		if (hw_ep->rx_reinit) {
> >  			musb_rx_reinit(musb, qh, epnum);
> > +			csr |= musb_set_toggle(qh, !is_out, urb);
> >  
> > -			/* init new state: toggle and NYET, maybe DMA later */
> > -			if (usb_gettoggle(urb->dev, qh->epnum, 0))
> > -				csr = MUSB_RXCSR_H_WR_DATATOGGLE
> > -					| MUSB_RXCSR_H_DATATOGGLE;
> > -			else
> > -				csr = 0;
> >  			if (qh->type == USB_ENDPOINT_XFER_INT)
> >  				csr |= MUSB_RXCSR_DISNYET;
> >  
> >

Patch
diff mbox series

diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index b59ce9a..16d0ba4 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -306,6 +306,25 @@  static inline void musb_save_toggle(struct musb_qh *qh, int is_in,
 	usb_settoggle(urb->dev, qh->epnum, !is_in, csr ? 1 : 0);
 }
 
+static inline u16 musb_set_toggle(struct musb_qh *qh, int is_in,
+	struct urb *urb)
+{
+	u16 csr = 0;
+	u16 toggle = 0;
+
+	toggle = usb_gettoggle(urb->dev, qh->epnum, !is_in);
+
+	if (is_in)
+		csr = toggle ? (MUSB_RXCSR_H_WR_DATATOGGLE
+				| MUSB_RXCSR_H_DATATOGGLE) : 0;
+	else
+		csr = toggle ? (MUSB_TXCSR_H_WR_DATATOGGLE
+				| MUSB_TXCSR_H_DATATOGGLE)
+				: MUSB_TXCSR_CLRDATATOG;
+
+	return csr;
+}
+
 /*
  * Advance this hardware endpoint's queue, completing the specified URB and
  * advancing to either the next URB queued to that qh, or else invalidating
@@ -772,13 +791,8 @@  static void musb_ep_program(struct musb *musb, u8 epnum,
 					);
 			csr |= MUSB_TXCSR_MODE;
 
-			if (!hw_ep->tx_double_buffered) {
-				if (usb_gettoggle(urb->dev, qh->epnum, 1))
-					csr |= MUSB_TXCSR_H_WR_DATATOGGLE
-						| MUSB_TXCSR_H_DATATOGGLE;
-				else
-					csr |= MUSB_TXCSR_CLRDATATOG;
-			}
+			if (!hw_ep->tx_double_buffered)
+				csr |= musb_set_toggle(qh, !is_out, urb);
 
 			musb_writew(epio, MUSB_TXCSR, csr);
 			/* REVISIT may need to clear FLUSHFIFO ... */
@@ -860,17 +874,12 @@  static void musb_ep_program(struct musb *musb, u8 epnum,
 
 	/* IN/receive */
 	} else {
-		u16	csr;
+		u16 csr = 0;
 
 		if (hw_ep->rx_reinit) {
 			musb_rx_reinit(musb, qh, epnum);
+			csr |= musb_set_toggle(qh, !is_out, urb);
 
-			/* init new state: toggle and NYET, maybe DMA later */
-			if (usb_gettoggle(urb->dev, qh->epnum, 0))
-				csr = MUSB_RXCSR_H_WR_DATATOGGLE
-					| MUSB_RXCSR_H_DATATOGGLE;
-			else
-				csr = 0;
 			if (qh->type == USB_ENDPOINT_XFER_INT)
 				csr |= MUSB_RXCSR_DISNYET;