linux-kernel - Re: [PATCH 10/14] USB: gadget: mv-udc: use phy-pxa-usb

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Date:   Mon, 5 Nov 2018 10:20:00 +0100
From:   Pavel Machek <pavel@....cz>
To:     Lubomir Rintel <lkundrak@...sk>
Cc:     linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Eric Miao <eric.y.miao@...il.com>,
        Haojian Zhuang <haojian.zhuang@...il.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Alan Stern <stern@...land.harvard.edu>
Subject: Re: [PATCH 10/14] USB: gadget: mv-udc: use phy-pxa-usb

On Wed 2018-08-22 22:43:03, Lubomir Rintel wrote:
> Use a proper PHY driver, instead of hooks to a board support package.
> 
> Signed-off-by: Lubomir Rintel <lkundrak@...sk>

Acked-by: Pavel Machek <pavel@....cz>

> ---
>  arch/arm/mach-mmp/devices.c          | 11 +-------
>  drivers/usb/gadget/udc/mv_udc.h      |  7 ++++-
>  drivers/usb/gadget/udc/mv_udc_core.c | 38 ++++++++--------------------
>  3 files changed, 17 insertions(+), 39 deletions(-)
> 
> diff --git a/arch/arm/mach-mmp/devices.c b/arch/arm/mach-mmp/devices.c
> index eb9b3c34e90a..d925be9f14a9 100644
> --- a/arch/arm/mach-mmp/devices.c
> +++ b/arch/arm/mach-mmp/devices.c
> @@ -263,21 +263,12 @@ struct platform_device pxa168_device_usb_phy = {
>  
>  #if IS_ENABLED(CONFIG_USB_MV_UDC)
>  struct resource pxa168_u2o_resources[] = {
> -	/* regbase */
>  	[0] = {
> -		.start	= PXA168_U2O_REGBASE + U2x_CAPREGS_OFFSET,
> +		.start	= PXA168_U2O_REGBASE,
>  		.end	= PXA168_U2O_REGBASE + USB_REG_RANGE,
>  		.flags	= IORESOURCE_MEM,
> -		.name	= "capregs",
>  	},
> -	/* phybase */
>  	[1] = {
> -		.start	= PXA168_U2O_PHYBASE,
> -		.end	= PXA168_U2O_PHYBASE + USB_PHY_RANGE,
> -		.flags	= IORESOURCE_MEM,
> -		.name	= "phyregs",
> -	},
> -	[2] = {
>  		.start	= IRQ_PXA168_USB1,
>  		.end	= IRQ_PXA168_USB1,
>  		.flags	= IORESOURCE_IRQ,
> diff --git a/drivers/usb/gadget/udc/mv_udc.h b/drivers/usb/gadget/udc/mv_udc.h
> index b3f759c0962c..6f04f432964d 100644
> --- a/drivers/usb/gadget/udc/mv_udc.h
> +++ b/drivers/usb/gadget/udc/mv_udc.h
> @@ -6,6 +6,9 @@
>  #ifndef __MV_UDC_H
>  #define __MV_UDC_H
>  
> +/* registers */
> +#define U2x_CAPREGS_OFFSET	0x100
> +
>  #define VUSBHS_MAX_PORTS	8
>  
>  #define DQH_ALIGNMENT		2048
> @@ -174,9 +177,9 @@ struct mv_udc {
>  	struct platform_device		*dev;
>  	int				irq;
>  
> +	void __iomem                    *base;
>  	struct mv_cap_regs __iomem	*cap_regs;
>  	struct mv_op_regs __iomem	*op_regs;
> -	void __iomem                    *phy_regs;
>  	unsigned int			max_eps;
>  	struct mv_dqh			*ep_dqh;
>  	size_t				ep_dqh_size;
> @@ -219,6 +222,8 @@ struct mv_udc {
>  
>  	/* some SOC has mutiple clock sources for USB*/
>  	struct clk      *clk;
> +
> +	struct phy	*phy;
>  };
>  
>  /* endpoint data structure */
> diff --git a/drivers/usb/gadget/udc/mv_udc_core.c b/drivers/usb/gadget/udc/mv_udc_core.c
> index 95f52232493b..c701c83d3af5 100644
> --- a/drivers/usb/gadget/udc/mv_udc_core.c
> +++ b/drivers/usb/gadget/udc/mv_udc_core.c
> @@ -1069,14 +1069,11 @@ static int mv_udc_enable_internal(struct mv_udc *udc)
>  	if (retval)
>  		return retval;
>  
> -	if (udc->pdata->phy_init) {
> -		retval = udc->pdata->phy_init(udc->phy_regs);
> -		if (retval) {
> -			dev_err(&udc->dev->dev,
> -				"init phy error %d\n", retval);
> -			udc_clock_disable(udc);
> -			return retval;
> -		}
> +	retval = phy_init(udc->phy);
> +	if (retval) {
> +		dev_err(&udc->dev->dev, "init phy error %d\n", retval);
> +		udc_clock_disable(udc);
> +		return retval;
>  	}
>  	udc->active = 1;
>  
> @@ -1095,8 +1092,7 @@ static void mv_udc_disable_internal(struct mv_udc *udc)
>  {
>  	if (udc->active) {
>  		dev_dbg(&udc->dev->dev, "disable udc\n");
> -		if (udc->pdata->phy_deinit)
> -			udc->pdata->phy_deinit(udc->phy_regs);
> +		phy_exit(udc->phy);
>  		udc_clock_disable(udc);
>  		udc->active = 0;
>  	}
> @@ -2147,30 +2143,16 @@ static int mv_udc_probe(struct platform_device *pdev)
>  	if (IS_ERR(udc->clk))
>  		return PTR_ERR(udc->clk);
>  
> -	r = platform_get_resource_byname(udc->dev, IORESOURCE_MEM, "capregs");
> +	r = platform_get_resource(udc->dev, IORESOURCE_MEM, 0);
>  	if (r == NULL) {
>  		dev_err(&pdev->dev, "no I/O memory resource defined\n");
>  		return -ENODEV;
>  	}
>  
> -	udc->cap_regs = (struct mv_cap_regs __iomem *)
> -		devm_ioremap(&pdev->dev, r->start, resource_size(r));
> -	if (udc->cap_regs == NULL) {
> -		dev_err(&pdev->dev, "failed to map I/O memory\n");
> -		return -EBUSY;
> -	}
> -
> -	r = platform_get_resource_byname(udc->dev, IORESOURCE_MEM, "phyregs");
> -	if (r == NULL) {
> -		dev_err(&pdev->dev, "no phy I/O memory resource defined\n");
> -		return -ENODEV;
> -	}
> +	udc->base = devm_ioremap(&pdev->dev, r->start, resource_size(r));
>  
> -	udc->phy_regs = devm_ioremap(&pdev->dev, r->start, resource_size(r));
> -	if (udc->phy_regs == NULL) {
> -		dev_err(&pdev->dev, "failed to map phy I/O memory\n");
> -		return -EBUSY;
> -	}
> +	udc->cap_regs =
> +		(void __iomem *) ((unsigned long)udc->base + U2x_CAPREGS_OFFSET);
>  
>  	/* we will acces controller register, so enable the clk */
>  	retval = mv_udc_enable_internal(udc);

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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