[PATCH] musb: refresh nop transceiver support for musb

[PATCH] musb: refresh nop transceiver support for musb

[Ajay Kumar Gupta]

As the parent patch for NOP transceiver got modified which now does the
NOP device registration also so removing registration part from 
usb-musb.c file.

Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
---
Against latest linux-omap tree as on 6th April.

 arch/arm/mach-omap2/usb-musb.c |   20 ++------------------
 1 files changed, 2 insertions(+), 18 deletions(-)

diff --git a/arch/arm/mach-omap2/usb-musb.c b/arch/arm/mach-omap2/usb-musb.c
index 927c2d9..e932b8c 100644
--- a/arch/arm/mach-omap2/usb-musb.c
+++ b/arch/arm/mach-omap2/usb-musb.c
@@ -25,6 +25,7 @@
 #include <linux/io.h>
 
 #include <linux/usb/musb.h>
+#include <linux/usb/otg.h>
 
 #include <mach/hardware.h>
 #include <mach/irqs.h>
@@ -145,20 +146,6 @@ static struct platform_device musb_device = {
 	.resource	= musb_resources,
 };
 
-#ifdef CONFIG_NOP_USB_XCEIV
-static u64 nop_xceiv_dmamask = DMA_32BIT_MASK;
-
-static struct platform_device nop_xceiv_device = {
-	.name		= "nop_usb_xceiv",
-	.id		= -1,
-	.dev = {
-		.dma_mask		= &nop_xceiv_dmamask,
-		.coherent_dma_mask	= DMA_32BIT_MASK,
-		.platform_data		= NULL,
-	},
-};
-#endif
-
 void __init usb_musb_init(void)
 {
 	if (cpu_is_omap243x()) {
@@ -172,10 +159,7 @@ void __init usb_musb_init(void)
 	musb_resources[0].end = musb_resources[0].start + SZ_8K - 1;
 
 #ifdef CONFIG_NOP_USB_XCEIV
-	if (platform_device_register(&nop_xceiv_device) < 0) {
-		printk(KERN_ERR "Unable to register NOP-XCEIV device\n");
-		return;
-	}
+	usb_nop_xceiv_register();
 #endif
 
 	if (platform_device_register(&musb_device) < 0) {
-- 
1.6.0.3

Re: [PATCH] musb: refresh nop transceiver support for musb

[Felipe Balbi]

On Mon, Apr 06, 2009 at 03:34:49PM +0200, Ajay Kumar Gupta wrote:
> As the parent patch for NOP transceiver got modified which now does the
> NOP device registration also so removing registration part from 
> usb-musb.c file.
> 
> Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
> ---
> Against latest linux-omap tree as on 6th April.
> 
>  arch/arm/mach-omap2/usb-musb.c |   20 ++------------------
>  1 files changed, 2 insertions(+), 18 deletions(-)
> 
> diff --git a/arch/arm/mach-omap2/usb-musb.c b/arch/arm/mach-omap2/usb-musb.c
> index 927c2d9..e932b8c 100644
> --- a/arch/arm/mach-omap2/usb-musb.c
> +++ b/arch/arm/mach-omap2/usb-musb.c
> @@ -25,6 +25,7 @@
>  #include <linux/io.h>
>  
>  #include <linux/usb/musb.h>
> +#include <linux/usb/otg.h>
>  
>  #include <mach/hardware.h>
>  #include <mach/irqs.h>
> @@ -145,20 +146,6 @@ static struct platform_device musb_device = {
>  	.resource	= musb_resources,
>  };
>  
> -#ifdef CONFIG_NOP_USB_XCEIV
> -static u64 nop_xceiv_dmamask = DMA_32BIT_MASK;
> -
> -static struct platform_device nop_xceiv_device = {
> -	.name		= "nop_usb_xceiv",
> -	.id		= -1,
> -	.dev = {
> -		.dma_mask		= &nop_xceiv_dmamask,
> -		.coherent_dma_mask	= DMA_32BIT_MASK,
> -		.platform_data		= NULL,
> -	},
> -};
> -#endif
> -
>  void __init usb_musb_init(void)
>  {
>  	if (cpu_is_omap243x()) {
> @@ -172,10 +159,7 @@ void __init usb_musb_init(void)
>  	musb_resources[0].end = musb_resources[0].start + SZ_8K - 1;
>  
>  #ifdef CONFIG_NOP_USB_XCEIV
> -	if (platform_device_register(&nop_xceiv_device) < 0) {
> -		printk(KERN_ERR "Unable to register NOP-XCEIV device\n");
> -		return;
> -	}
> +	usb_nop_xceiv_register();

how about you move the ifdef also to the definition of
usb_nop_xceiv_register(). It's probably in a header file somewhere so
you:

#ifdef CONFIG_NOP_USB_XCEIV
extern void usb_nop_xceiv_register();
#else
static inline void usb_nop_xceiv_register(void) {}
#endif

then you can remove the ifdef from usb-musb.c

-- 
balbi

RE: [PATCH] musb: refresh nop transceiver support for musb

[Gupta, Ajay Kumar]

> >  void __init usb_musb_init(void)
> >  {
> >  	if (cpu_is_omap243x()) {
> > @@ -172,10 +159,7 @@ void __init usb_musb_init(void)
> >  	musb_resources[0].end = musb_resources[0].start + SZ_8K - 1;
> >
> >  #ifdef CONFIG_NOP_USB_XCEIV
> > -	if (platform_device_register(&nop_xceiv_device) < 0) {
> > -		printk(KERN_ERR "Unable to register NOP-XCEIV device\n");
> > -		return;
> > -	}
> > +	usb_nop_xceiv_register();
> 
> how about you move the ifdef also to the definition of
> usb_nop_xceiv_register(). It's probably in a header file somewhere so
> you:

It is at: include/linux/usb/otg.h,
==============
#ifdef CONFIG_NOP_USB_XCEIV
extern void usb_nop_xceiv_register(void);
extern void usb_nop_xceiv_unregister(void);
#endif
================
But one of the David's queued patch [1] removes the #ifdef part.
[1] http://marc.info/?l=linux-usb&m=123852883820097&w=2

Is it ok to add it back in this patch?

David, what's your comment on this?

-Ajay

> 
> #ifdef CONFIG_NOP_USB_XCEIV
> extern void usb_nop_xceiv_register();
> #else
> static inline void usb_nop_xceiv_register(void) {}
> #endif
> 
> then you can remove the ifdef from usb-musb.c
> 
> --
> balbi

Re: [PATCH] musb: refresh nop transceiver support for musb

[Felipe Balbi]

On Mon, Apr 06, 2009 at 04:08:01PM +0200, Ajay Kumar Gupta wrote:
> > >  void __init usb_musb_init(void)
> > >  {
> > >  	if (cpu_is_omap243x()) {
> > > @@ -172,10 +159,7 @@ void __init usb_musb_init(void)
> > >  	musb_resources[0].end = musb_resources[0].start + SZ_8K - 1;
> > >
> > >  #ifdef CONFIG_NOP_USB_XCEIV
> > > -	if (platform_device_register(&nop_xceiv_device) < 0) {
> > > -		printk(KERN_ERR "Unable to register NOP-XCEIV device\n");
> > > -		return;
> > > -	}
> > > +	usb_nop_xceiv_register();
> > 
> > how about you move the ifdef also to the definition of
> > usb_nop_xceiv_register(). It's probably in a header file somewhere so
> > you:
> 
> It is at: include/linux/usb/otg.h,
> ==============
> #ifdef CONFIG_NOP_USB_XCEIV
> extern void usb_nop_xceiv_register(void);
> extern void usb_nop_xceiv_unregister(void);
> #endif
> ================
> But one of the David's queued patch [1] removes the #ifdef part.
> [1] http://marc.info/?l=linux-usb&m=123852883820097&w=2
> 
> Is it ok to add it back in this patch?
> 
> David, what's your comment on this?

if the user doesn't select the nop transceiver, I guess that symbol
should become a static inline doing nothing.

What do you think Dave ?

-- 
balbi

Re: [PATCH] musb: refresh nop transceiver support for musb

[David Brownell]

On Monday 06 April 2009, Gupta, Ajay Kumar wrote:
> David, what's your comment on this?

It was wrong to try registering the transceiver in
the mach-map2/usb2.c file in any case.  That's a
board-specific issue for OMAP3; and TUSB60x0 chips
have an integrated one.  See

 http://marc.info/?l=linux-usb&m=123852898920405&w=2

So for example the RX51 board support (nyet in mainline)
needs to register the NOP transceiver; and I think one
more board, maybe the OMAP3 EVM, does too.

- Dave

p.s. This issue is *only* for the OMAP tree.


  

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Re: [PATCH] musb: refresh nop transceiver support for musb

[David Brownell]

On Monday 06 April 2009, Ajay Kumar Gupta wrote:
> As the parent patch for NOP transceiver got modified which now does the
> NOP device registration also so removing registration part from 
> usb-musb.c file.
> 
> Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
> ---
> Against latest linux-omap tree as on 6th April.

NAK -- see earlier comment

> 
>  arch/arm/mach-omap2/usb-musb.c |   20 ++------------------
>  1 files changed, 2 insertions(+), 18 deletions(-)
> 
> diff --git a/arch/arm/mach-omap2/usb-musb.c b/arch/arm/mach-omap2/usb-musb.c
> index 927c2d9..e932b8c 100644
> --- a/arch/arm/mach-omap2/usb-musb.c
> +++ b/arch/arm/mach-omap2/usb-musb.c
> @@ -25,6 +25,7 @@
>  #include <linux/io.h>
>  
>  #include <linux/usb/musb.h>
> +#include <linux/usb/otg.h>
>  
>  #include <mach/hardware.h>
>  #include <mach/irqs.h>
> @@ -145,20 +146,6 @@ static struct platform_device musb_device = {
>  	.resource	= musb_resources,
>  };
>  
> -#ifdef CONFIG_NOP_USB_XCEIV
> -static u64 nop_xceiv_dmamask = DMA_32BIT_MASK;
> -
> -static struct platform_device nop_xceiv_device = {
> -	.name		= "nop_usb_xceiv",
> -	.id		= -1,
> -	.dev = {
> -		.dma_mask		= &nop_xceiv_dmamask,
> -		.coherent_dma_mask	= DMA_32BIT_MASK,
> -		.platform_data		= NULL,
> -	},
> -};
> -#endif
> -
>  void __init usb_musb_init(void)
>  {
>  	if (cpu_is_omap243x()) {
> @@ -172,10 +159,7 @@ void __init usb_musb_init(void)
>  	musb_resources[0].end = musb_resources[0].start + SZ_8K - 1;
>  
>  #ifdef CONFIG_NOP_USB_XCEIV
> -	if (platform_device_register(&nop_xceiv_device) < 0) {
> -		printk(KERN_ERR "Unable to register NOP-XCEIV device\n");
> -		return;
> -	}
> +	usb_nop_xceiv_register();
>  #endif
>  
>  	if (platform_device_register(&musb_device) < 0) {
> -- 
> 1.6.0.3
> 
> 

RE: [PATCH] musb: refresh nop transceiver support for musb

[Gupta, Ajay Kumar]

> -----Original Message-----
> From: David Brownell [mailto:david-b@pacbell.net]
> Sent: Tuesday, April 07, 2009 12:01 AM
> To: Gupta, Ajay Kumar
> Cc: felipe.balbi@nokia.com; linux-usb@vger.kernel.org; linux-omap@vger.kernel.org; tony@atomide.com
> Subject: Re: [PATCH] musb: refresh nop transceiver support for musb
> 
> On Monday 06 April 2009, Gupta, Ajay Kumar wrote:
> > David, what's your comment on this?
> 
> It was wrong to try registering the transceiver in
> the mach-map2/usb2.c file in any case.  That's a
> board-specific issue for OMAP3; and TUSB60x0 chips
> have an integrated one.  See

I have updated the patch with below changes,
	-removed NOP transceiver code from arch/arm/mach-omap2/usb-musb.c
	-Added NOP transceiver at drivers/usb/musb/omap2430.c in musb_platform_init()
	 same as done in davinci/BlackFin/tusb6010 in your queued patch.
	-Modified include/linux/usb/otg.h with Felipe's suggestion which removes the #ifdef
	 from drivers/usb/musb/omap2430.c file.
Please review this one attached below. 
====== cut here ==============
[PATCH] musb: refresh NOP transceiver support for OMAP35x EVM

Removing NOP support code from usb-musb.c and adding its support at
Drivers/usb/musb/omap2430.c.

Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
---
It is against latest l-o tree + Queued patches from David (21 patches).

 arch/arm/mach-omap2/usb-musb.c |   21 ---------------------
 drivers/usb/musb/omap2430.c    |    4 ++++
 include/linux/usb/otg.h        |    6 +++++-
 3 files changed, 9 insertions(+), 22 deletions(-)

diff --git a/arch/arm/mach-omap2/usb-musb.c b/arch/arm/mach-omap2/usb-musb.c
index 927c2d9..6f768d6 100644
--- a/arch/arm/mach-omap2/usb-musb.c
+++ b/arch/arm/mach-omap2/usb-musb.c
@@ -145,20 +145,6 @@ static struct platform_device musb_device = {
 	.resource	= musb_resources,
 };
 
-#ifdef CONFIG_NOP_USB_XCEIV
-static u64 nop_xceiv_dmamask = DMA_32BIT_MASK;
-
-static struct platform_device nop_xceiv_device = {
-	.name		= "nop_usb_xceiv",
-	.id		= -1,
-	.dev = {
-		.dma_mask		= &nop_xceiv_dmamask,
-		.coherent_dma_mask	= DMA_32BIT_MASK,
-		.platform_data		= NULL,
-	},
-};
-#endif
-
 void __init usb_musb_init(void)
 {
 	if (cpu_is_omap243x()) {
@@ -171,13 +157,6 @@ void __init usb_musb_init(void)
 
 	musb_resources[0].end = musb_resources[0].start + SZ_8K - 1;
 
-#ifdef CONFIG_NOP_USB_XCEIV
-	if (platform_device_register(&nop_xceiv_device) < 0) {
-		printk(KERN_ERR "Unable to register NOP-XCEIV device\n");
-		return;
-	}
-#endif
-
 	if (platform_device_register(&musb_device) < 0) {
 		printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n");
 		return;
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index 3fbc807..abfe061 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -209,6 +209,9 @@ int __init musb_platform_init(struct musb *musb)
 	omap_cfg_reg(AE5_2430_USB0HS_STP);
 #endif
 
+	/* OMAP35x EVM needs to regsiter NOP transceiver */
+	usb_nop_xceiv_register();
+
 	/* We require some kind of external transceiver, hooked
 	 * up through ULPI.  TWL4030-family PMICs include one,
 	 * which needs a driver, drivers aren't always needed.
@@ -313,5 +316,6 @@ int musb_platform_exit(struct musb *musb)
 	clk_put(musb->clock);
 	musb->clock = 0;
 
+	usb_nop_xceiv_unregister();
 	return 0;
 }
diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
index 2443c0e..9778268 100644
--- a/include/linux/usb/otg.h
+++ b/include/linux/usb/otg.h
@@ -82,9 +82,13 @@ struct otg_transceiver {
 extern int otg_set_transceiver(struct otg_transceiver *);
 
 /* sometimes transceivers are accessed only through e.g. ULPI */
+#ifdef CONFIG_NOP_USB_XCEIV
 extern void usb_nop_xceiv_register(void);
 extern void usb_nop_xceiv_unregister(void);
-
+#else
+static inline void usb_nop_xceiv_register(void) {}
+static inline void usb_nop_xceiv_unregister(void) {}
+#endif
 
 /* for usb host and peripheral controller drivers */
 extern struct otg_transceiver *otg_get_transceiver(void);
-- 
1.6.0.3
==============================