On Wed, Jun 24, 2015 at 11:04:43AM +0800, Peter Chen wrote:
> On Wed, Jun 17, 2015 at 07:40:15PM +0800, Li Jun wrote:
> > Set gadget's otg capabilities according to controller's capability and otg
> > properties in device tree.
> >
> > Signed-off-by: Li Jun <jun.li@xxxxxxxxxxxxx>
> > ---
> > drivers/usb/chipidea/core.c | 8 ++++++++
> > drivers/usb/chipidea/udc.c | 7 ++++++-
> > include/linux/usb/chipidea.h | 1 +
> > 3 files changed, 15 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
> > index 74fea4f..2abecbc 100644
> > --- a/drivers/usb/chipidea/core.c
> > +++ b/drivers/usb/chipidea/core.c
> > @@ -588,6 +588,14 @@ static int ci_get_platdata(struct device *dev,
> > of_usb_host_tpl_support(dev->of_node);
> > }
> >
> > + if (platdata->dr_mode == USB_DR_MODE_OTG) {
> > + /* We can support HNP and SRP */
> > + platdata->ci_otg_caps.hnp_support = true;
> > + platdata->ci_otg_caps.srp_support = true;
> > + /* Update otg capabilities by DT properties */
> > + of_usb_set_otg_caps(dev->of_node, &platdata->ci_otg_caps);
> > + }
> > +
>
> For current dual-role supported platforms (through ID pin), their dts has nothing
> with otg capabilities, what will happen if we set .hnp_support as true?
>
No impact for them, those platforms will continue work as before(i.e.
otg descriptor with HNP&SRP enabled if CONFIG_USB_OTG is selected,
no otg fsm if CONFIG_USB_OTG_FSM is not selected).
> For non-dt platform (eg i686), how it changes otg capabilities through
> their platform data?
>
Directly override platdata->ci_otg_caps in its platform driver after
ci_hdrc_add_device().
> Peter
> > if (of_usb_get_maximum_speed(dev->of_node) == USB_SPEED_FULL)
> > platdata->flags |= CI_HDRC_FORCE_FULLSPEED;
> >
> > diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
> > index 764f668..858bd21 100644
> > --- a/drivers/usb/chipidea/udc.c
> > +++ b/drivers/usb/chipidea/udc.c
> > @@ -1827,6 +1827,7 @@ static irqreturn_t udc_irq(struct ci_hdrc *ci)
> > static int udc_start(struct ci_hdrc *ci)
> > {
> > struct device *dev = ci->dev;
> > + struct usb_otg_caps *otg_caps = &ci->platdata->ci_otg_caps;
> > int retval = 0;
> >
> > spin_lock_init(&ci->lock);
> > @@ -1834,8 +1835,12 @@ static int udc_start(struct ci_hdrc *ci)
> > ci->gadget.ops = &usb_gadget_ops;
> > ci->gadget.speed = USB_SPEED_UNKNOWN;
> > ci->gadget.max_speed = USB_SPEED_HIGH;
> > - ci->gadget.is_otg = ci->is_otg ? 1 : 0;
> > ci->gadget.name = ci->platdata->name;
> > + ci->gadget.otg_caps = otg_caps;
> > +
> > + if (otg_caps->otg_rev && (otg_caps->hnp_support ||
> > + otg_caps->srp_support || otg_caps->adp_support))
> > + ci->gadget.is_otg = 1;
> >
> > INIT_LIST_HEAD(&ci->gadget.ep_list);
> >
> > diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h
> > index ab94f78..e10cefc 100644
> > --- a/include/linux/usb/chipidea.h
> > +++ b/include/linux/usb/chipidea.h
> > @@ -34,6 +34,7 @@ struct ci_hdrc_platform_data {
> > #define CI_HDRC_CONTROLLER_STOPPED_EVENT 1
> > void (*notify_event) (struct ci_hdrc *ci, unsigned event);
> > struct regulator *reg_vbus;
> > + struct usb_otg_caps ci_otg_caps;
> > bool tpl_support;
> > };
> >
> > --
> > 1.9.1
> >
>
> --
>
> Best Regards,
> Peter Chen
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