linux-kernel - Re: [PATCH RFC] usb: dwc3: Set GCTL.PrtCapDir based on selected mode.

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Message-ID: <20130225091935.GF25749@arwen.pp.htv.fi>
Date:	Mon, 25 Feb 2013 11:19:35 +0200
From:	Felipe Balbi <balbi@...com>
To:	Vivek Gautam <gautamvivek1987@...il.com>
CC:	<balbi@...com>, Vivek Gautam <gautam.vivek@...sung.com>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-omap@...r.kernel.org>, <gregkh@...uxfoundation.org>,
	<kishon@...com>
Subject: Re: [PATCH RFC] usb: dwc3: Set GCTL.PrtCapDir based on selected mode.

Hi,

On Mon, Feb 25, 2013 at 02:21:46PM +0530, Vivek Gautam wrote:
> >> @@ -514,6 +511,14 @@ static int dwc3_probe(struct platform_device *pdev)
> >>       }
> >>       dwc->mode = mode;
> >>
> >> +#if IS_ENABLED(CONFIG_USB_DWC3_HOST)
> >> +     dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST);
> >> +#elif IS_ENABLED(CONFIG_USB_DWC3_GADGET)
> >> +     dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
> >> +#else
> >> +     dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG);
> >> +#endif
> >
> > you can actually use:
> >
> > if (IS_ENABLED(CONFIG_USB_DWC3_HOST))
> >         dwc3_set_mode(dwc...
> > else if (IS_ENABLED( ...
> >         ...
> > else
> >         ...
> >
> 
> I am actually hoping to change this to something like below (after
> of course changing the preprocessor conditionals) :
> 
> commit 9a62ed948dcb6ac5d78aff41f5355c0a5ea86475
> Author: Vivek Gautam <gautam.vivek@...sung.com>
> Date:   Thu Jan 24 11:58:05 2013 +0530
> 
>     usb: dwc3: Set GCTL.PrtCapDir based on selected mode.
> 
>     Now that machines may select the mode of working of DWC3,
>     we can set the Port capability direction based on selected mode.
> 
>     Signed-off-by: Vivek Gautam <gautam.vivek@...sung.com>
> 
> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> index 79f335f..9444fbe 100644
> --- a/drivers/usb/dwc3/core.c
> +++ b/drivers/usb/dwc3/core.c
> @@ -478,7 +478,13 @@ static int dwc3_probe(struct platform_device *pdev)
>                 goto err1;
>         }
> 
> -       mode = DWC3_MODE(dwc->hwparams.hwparams0);
> +#if IS_ENABLED(CONFIG_USB_DWC3_HOST)
> +       mode = DWC3_MODE_HOST;
> +#elif IS_ENABLED(CONFIG_USB_DWC3_GADGET)
> +       mode = DWC3_MODE_DEVICE;
> +#else
> +       mode = DWC3_MODE_DRD;

looks alright.

-- 
balbi

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