On Tue, Jul 07, 2015 at 04:25:44PM +0300, Roger Quadros wrote:
> On 29/06/15 10:47, Li Jun wrote:
> >Init and update otg capabilities by DT, set gadget's otg capabilities
> >accordingly.
> >
> >Signed-off-by: Li Jun <[email protected]>
> >---
> > drivers/usb/chipidea/core.c | 10 ++++++++++
> > drivers/usb/chipidea/udc.c | 7 ++++++-
> > include/linux/usb/chipidea.h | 1 +
> > 3 files changed, 17 insertions(+), 1 deletion(-)
> >
> >diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
> >index 74fea4f..248f571 100644
> >--- a/drivers/usb/chipidea/core.c
> >+++ b/drivers/usb/chipidea/core.c
> >@@ -588,6 +588,16 @@ 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 of OTG 2.0 */
> >+ platdata->ci_otg_caps.otg_rev = 0x0200;
> >+ platdata->ci_otg_caps.hnp_support = true;
> >+ platdata->ci_otg_caps.srp_support = true;
> >+
> >+ /* Update otg capabilities by DT properties */
> >+ of_usb_update_otg_caps(dev->of_node, &platdata->ci_otg_caps);
>
> What if this function fails. e.g. DT contains unsupported OTG version?
Just an error print out, otg-rev will be the initial value(0x0200), it will
work as otg 2.0.
> I think we should error out in that case.
>
Disable all otg features? or even stop all usb initialization?
Li Jun
> >+ }
> >+
> > if (of_usb_get_maximum_speed(dev->of_node) == USB_SPEED_FULL)
> > platdata->flags |= CI_HDRC_FORCE_FULLSPEED;
>
> cheers,
> -roger
>
> >
> >diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
> >index 764f668..b7cca3e 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->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;
> > };
> >
> >
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