linux-kernel - Re: [PATCH v3] EHCI bus glue for on-chip PMC MSP USB controller.

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Date:	Wed, 09 Feb 2011 21:14:56 +0530
From:	Anoop P A <anoop.pa@...il.com>
To:	Matthieu CASTET <matthieu.castet@...rot.com>
Cc:	"gregkh@...e.de" <gregkh@...e.de>,
	"dbrownell@...rs.sourceforge.net" <dbrownell@...rs.sourceforge.net>,
	"ust@...x.de" <ust@...x.de>,
	"pkondeti@...eaurora.org" <pkondeti@...eaurora.org>,
	"stern@...land.harvard.edu" <stern@...land.harvard.edu>,
	"gadiyar@...com" <gadiyar@...com>,
	"alek.du@...el.com" <alek.du@...el.com>,
	"jacob.jun.pan@...el.com" <jacob.jun.pan@...el.com>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mips@...ux-mips.org" <linux-mips@...ux-mips.org>,
	"ralf@...ux-mips.org" <ralf@...ux-mips.org>
Subject: Re: [PATCH v3] EHCI bus glue for on-chip PMC MSP USB controller.

On Wed, 2011-02-09 at 16:10 +0100, Matthieu CASTET wrote:
> Anoop P.A a écrit :
> 
> >  config XPS_USB_HCD_XILINX
> > diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
> > index 6fee3cd..a591890 100644
> > --- a/drivers/usb/host/ehci-hcd.c
> > +++ b/drivers/usb/host/ehci-hcd.c
> > @@ -262,6 +262,8 @@ static void tdi_reset (struct ehci_hcd *ehci)
> >         if (ehci_big_endian_mmio(ehci))
> >                 tmp |= USBMODE_BE;
> >         ehci_writel(ehci, tmp, reg_ptr);
> > +       if (ehci->pmc_msp_tdi)
> > +               usb_hcd_tdi_set_mode(ehci);
> >  }
> This is ugly to add callback to your driver here.
> How this will build on other platform, usb_hcd_tdi_set_mode is only 
> defined on ehci-pmcmsp.c

I got that will remove it from patch and resend.the patch got carried
from an older kernel :( .

Thanks

> 
> 
> > +void usb_hcd_tdi_set_mode(struct ehci_hcd *ehci)
> > +{
> > +	u8 *base;
> > +	u8 *statreg;
> > +	u8 *fiforeg;
> > +	u32 val;
> > +	struct ehci_regs *reg_base = ehci->regs;
> > +
> > +	/* get register base */
> > +	base = (u8 *)reg_base + USB_EHCI_REG_USB_MODE;
> > +	statreg = (u8 *)reg_base + USB_EHCI_REG_USB_STATUS;
> > +	fiforeg = (u8 *)reg_base + USB_EHCI_REG_USB_FIFO;
> > +
> > +	/* set the controller to host mode and BIG ENDIAN */
> > +	ehci_writel(ehci, (USB_CTRL_MODE_HOST | USB_CTRL_MODE_BIG_ENDIAN
> > +		| USB_CTRL_MODE_STREAM_DISABLE), (u32 *)base);
> > +
> We have done that in tdi_reset, why do you do it again ?
> 
> 
> Matthieu


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