RE: [PATCH v2 4/4] usb: aspeed-vhub: support test mode feature

Neal Liu
2021-12-01T03:37:05Z

> -----Original Message-----
> From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Sent: Tuesday, November 30, 2021 7:47 PM
> To: Neal Liu <neal_liu@aspeedtech.com>
> Cc: Felipe Balbi <balbi@kernel.org>; Joel Stanley <joel@jms.id.au>; Andrew
> Jeffery <andrew@aj.id.au>; Cai Huoqing <caihuoqing@baidu.com>; Tao Ren
> <rentao.bupt@gmail.com>; Julia Lawall <julia.lawall@inria.fr>; kernel test
> robot <lkp@intel.com>; Sasha Levin <sashal@kernel.org>;
> linux-usb@vger.kernel.org; linux-kernel@vger.kernel.org;
> linux-arm-kernel@lists.infradead.org; linux-aspeed@lists.ozlabs.org; BMC-SW
> <BMC-SW@aspeedtech.com>
> Subject: Re: [PATCH v2 4/4] usb: aspeed-vhub: support test mode feature
>
> On Tue, Nov 30, 2021 at 06:42:56PM +0800, Neal Liu wrote:
> > Support aspeed usb vhub set feature to test mode.
> >
> > Signed-off-by: Neal Liu <neal_liu@aspeedtech.com>
> > ---
> > drivers/usb/gadget/udc/aspeed-vhub/dev.c | 18 ++++++++++++++----
> > drivers/usb/gadget/udc/aspeed-vhub/hub.c | 22 ++++++++++++++++------
> > 2 files changed, 30 insertions(+), 10 deletions(-)
> >
> > diff --git a/drivers/usb/gadget/udc/aspeed-vhub/dev.c
> > b/drivers/usb/gadget/udc/aspeed-vhub/dev.c
> > index d918e8b2af3c..4462f4b73b04 100644
> > --- a/drivers/usb/gadget/udc/aspeed-vhub/dev.c
> > +++ b/drivers/usb/gadget/udc/aspeed-vhub/dev.c
> > @@ -110,15 +110,25 @@ static int ast_vhub_dev_feature(struct
> ast_vhub_dev *d,
> > u16 wIndex, u16 wValue,
> > bool is_set)
> > {
> > + u32 val;
> > +
> > DDBG(d, "%s_FEATURE(dev val=%02x)\n",
> > is_set ? "SET" : "CLEAR", wValue);
> >
> > - if (wValue != USB_DEVICE_REMOTE_WAKEUP)
> > - return std_req_driver;
> > + if (wValue == USB_DEVICE_REMOTE_WAKEUP) {
> > + d->wakeup_en = is_set;
> > + return std_req_complete;
> >
> > - d->wakeup_en = is_set;
> > + } else if (wValue == USB_DEVICE_TEST_MODE) {
>
> If you return, no need for an else statement, right?
>
>
> > + val = readl(d->vhub->regs + AST_VHUB_CTRL);
> > + val &= ~GENMASK(10, 8);
> > + val |= VHUB_CTRL_SET_TEST_MODE((wIndex >> 8) & 0x7);
> > + writel(val, d->vhub->regs + AST_VHUB_CTRL);
> >
> > - return std_req_complete;
> > + return std_req_complete;
> > + }
> > +
> > + return std_req_driver;
> > }
> >
> > static int ast_vhub_ep_feature(struct ast_vhub_dev *d, diff --git
> > a/drivers/usb/gadget/udc/aspeed-vhub/hub.c
> > b/drivers/usb/gadget/udc/aspeed-vhub/hub.c
> > index 93f27a745760..e52805fbdebd 100644
> > --- a/drivers/usb/gadget/udc/aspeed-vhub/hub.c
> > +++ b/drivers/usb/gadget/udc/aspeed-vhub/hub.c
> > @@ -212,17 +212,27 @@ static int ast_vhub_hub_dev_feature(struct
> ast_vhub_ep *ep,
> > u16 wIndex, u16 wValue,
> > bool is_set)
> > {
> > + u32 val;
> > +
> > EPDBG(ep, "%s_FEATURE(dev val=%02x)\n",
> > is_set ? "SET" : "CLEAR", wValue);
> >
> > - if (wValue != USB_DEVICE_REMOTE_WAKEUP)
> > - return std_req_stall;
> > + if (wValue == USB_DEVICE_REMOTE_WAKEUP) {
> > + ep->vhub->wakeup_en = is_set;
> > + EPDBG(ep, "Hub remote wakeup %s\n",
> > + is_set ? "enabled" : "disabled");
> > + return std_req_complete;
> >
> > - ep->vhub->wakeup_en = is_set;
> > - EPDBG(ep, "Hub remote wakeup %s\n",
> > - is_set ? "enabled" : "disabled");
> > + } else if (wValue == USB_DEVICE_TEST_MODE) {
>
> Same here, no need for else.
>
> thanks,
>
> greg k-h

Okay, I'll fix it in next patch. Thanks

-Neal