linux-kernel - Re: [PATCH] usb: ehci: add pci device support for Aspeed platforms

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Date:   Tue, 8 Feb 2022 09:41:57 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Neal Liu <neal_liu@...eedtech.com>
Cc:     Alan Stern <stern@...land.harvard.edu>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        Tao Ren <rentao.bupt@...il.com>, BMC-SW <BMC-SW@...eedtech.com>
Subject: Re: [PATCH] usb: ehci: add pci device support for Aspeed platforms

On Tue, Feb 08, 2022 at 08:20:07AM +0000, Neal Liu wrote:
> > -----Original Message-----
> > From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > Sent: Tuesday, February 8, 2022 3:38 PM
> > To: Neal Liu <neal_liu@...eedtech.com>
> > Cc: Alan Stern <stern@...land.harvard.edu>; Bjorn Helgaas
> > <bhelgaas@...gle.com>; linux-usb@...r.kernel.org;
> > linux-kernel@...r.kernel.org; linux-pci@...r.kernel.org; Tao Ren
> > <rentao.bupt@...il.com>; BMC-SW <BMC-SW@...eedtech.com>
> > Subject: Re: [PATCH] usb: ehci: add pci device support for Aspeed platforms
> > 
> > On Tue, Feb 08, 2022 at 02:29:27PM +0800, Neal Liu wrote:
> > > Enable Aspeed quirks in commit 7f2d73788d90 ("usb: ehci:
> > > handshake CMD_RUN instead of STS_HALT") to support Aspeed ehci-pci
> > > device.
> > >
> > > Signed-off-by: Neal Liu <neal_liu@...eedtech.com>
> > > ---
> > >  drivers/usb/host/ehci-pci.c | 6 ++++++
> > >  include/linux/pci_ids.h     | 3 +++
> > >  2 files changed, 9 insertions(+)
> > >
> > > diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
> > > index e87cf3a00fa4..a91b25d216ae 100644
> > > --- a/drivers/usb/host/ehci-pci.c
> > > +++ b/drivers/usb/host/ehci-pci.c
> > > @@ -222,6 +222,12 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
> > >  			ehci->has_synopsys_hc_bug = 1;
> > >  		}
> > >  		break;
> > > +	case PCI_VENDOR_ID_ASPEED:
> > > +		if (pdev->device == PCI_DEVICE_ID_ASPEED_EHCI) {
> > > +			ehci_info(ehci, "applying Aspeed HC workaround\n");
> > > +			ehci->is_aspeed = 1;
> > > +		}
> > > +		break;
> > >  	}
> > >
> > >  	/* optional debug port, normally in the first BAR */ diff --git
> > > a/include/linux/pci_ids.h b/include/linux/pci_ids.h index
> > > aad54c666407..410b395fe56c 100644
> > > --- a/include/linux/pci_ids.h
> > > +++ b/include/linux/pci_ids.h
> > > @@ -3096,4 +3096,7 @@
> > >
> > >  #define PCI_VENDOR_ID_NCUBE		0x10ff
> > >
> > > +#define PCI_VENDOR_ID_ASPEED		0x1a03
> > > +#define PCI_DEVICE_ID_ASPEED_EHCI	0x2603
> > 
> > Please read the top of this file, this does not need to be added here.
> > 
> > thanks,
> > 
> > greg k-h
> 
> Are you suggesting to hard code vendor/device ID in driver instead?

Or put the define in the ehci-pci.c file like other drivers do.  Only
add to the pci_ids.h file if your define is needed in multiple drivers,
otherwise it is a merge nightmare.

thanks,

greg k-h