| Message ID | 20170120185057.16206-3-stephen.boyd@linaro.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Delegated to: | Andy Gross |
| Headers | show |
On Fri, Jan 20, 2017 at 10:50:54AM -0800, Stephen Boyd wrote: > When the qcom chipidea controller is used with an extcon, we need > to signal device mode or host mode to the phy so it can configure > itself for the correct mode. This should be done after the phy is > powered up, so that the register writes work correctly. Add in > the appropriate phy_set_mode() call here. > > To signal the correct state to the qcom glue driver we need to > change the ci->role before we do the role switch. Make sure to > undo the change if the role switch fails, but otherwise update > the state before calling the role start function so that the glue > driver knows what state to configure for. > > Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org> > --- > > Made this msm specific because of how msm handles phy powerup. > > drivers/usb/chipidea/ci.h | 7 +++++-- > drivers/usb/chipidea/ci_hdrc_msm.c | 4 ++++ > 2 files changed, 9 insertions(+), 2 deletions(-) > > diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h > index 59e22389c10b..18348b0529af 100644 > --- a/drivers/usb/chipidea/ci.h > +++ b/drivers/usb/chipidea/ci.h > @@ -268,6 +268,7 @@ static inline struct ci_role_driver *ci_role(struct ci_hdrc *ci) > static inline int ci_role_start(struct ci_hdrc *ci, enum ci_role role) > { > int ret; > + enum ci_role prev_role; > > if (role >= CI_ROLE_END) > return -EINVAL; > @@ -275,9 +276,11 @@ static inline int ci_role_start(struct ci_hdrc *ci, enum ci_role role) > if (!ci->roles[role]) > return -ENXIO; > > + prev_role = ci->role; > + ci->role = role; > ret = ci->roles[role]->start(ci); > - if (!ret) > - ci->role = role; > + if (ret) > + ci->role = prev_role; > return ret; Sorry, this changes ci->role's life cycle. You may try to get coming role at your glue layer code (eg, through usbmode), or add your changes at ci_role_start directly if the sequence can make your requirement. Peter > } > > diff --git a/drivers/usb/chipidea/ci_hdrc_msm.c b/drivers/usb/chipidea/ci_hdrc_msm.c > index f1ede7909f54..9c58d13970ca 100644 > --- a/drivers/usb/chipidea/ci_hdrc_msm.c > +++ b/drivers/usb/chipidea/ci_hdrc_msm.c > @@ -125,6 +125,10 @@ static int ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event) > hw_write(ci, OP_USBCMD, HSPHY_SESS_VLD_CTRL, > HSPHY_SESS_VLD_CTRL); > > + if (ci->role == CI_ROLE_GADGET) > + phy_set_mode(ci->phy, PHY_MODE_USB_DEVICE); > + else if (ci->role == CI_ROLE_HOST) > + phy_set_mode(ci->phy, PHY_MODE_USB_HOST); > } > break; > case CI_HDRC_CONTROLLER_STOPPED_EVENT: > -- > 2.10.0.297.gf6727b0 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-usb" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h index 59e22389c10b..18348b0529af 100644 --- a/drivers/usb/chipidea/ci.h +++ b/drivers/usb/chipidea/ci.h @@ -268,6 +268,7 @@ static inline struct ci_role_driver *ci_role(struct ci_hdrc *ci) static inline int ci_role_start(struct ci_hdrc *ci, enum ci_role role) { int ret; + enum ci_role prev_role; if (role >= CI_ROLE_END) return -EINVAL; @@ -275,9 +276,11 @@ static inline int ci_role_start(struct ci_hdrc *ci, enum ci_role role) if (!ci->roles[role]) return -ENXIO; + prev_role = ci->role; + ci->role = role; ret = ci->roles[role]->start(ci); - if (!ret) - ci->role = role; + if (ret) + ci->role = prev_role; return ret; } diff --git a/drivers/usb/chipidea/ci_hdrc_msm.c b/drivers/usb/chipidea/ci_hdrc_msm.c index f1ede7909f54..9c58d13970ca 100644 --- a/drivers/usb/chipidea/ci_hdrc_msm.c +++ b/drivers/usb/chipidea/ci_hdrc_msm.c @@ -125,6 +125,10 @@ static int ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event) hw_write(ci, OP_USBCMD, HSPHY_SESS_VLD_CTRL, HSPHY_SESS_VLD_CTRL); + if (ci->role == CI_ROLE_GADGET) + phy_set_mode(ci->phy, PHY_MODE_USB_DEVICE); + else if (ci->role == CI_ROLE_HOST) + phy_set_mode(ci->phy, PHY_MODE_USB_HOST); } break; case CI_HDRC_CONTROLLER_STOPPED_EVENT:
When the qcom chipidea controller is used with an extcon, we need to signal device mode or host mode to the phy so it can configure itself for the correct mode. This should be done after the phy is powered up, so that the register writes work correctly. Add in the appropriate phy_set_mode() call here. To signal the correct state to the qcom glue driver we need to change the ci->role before we do the role switch. Make sure to undo the change if the role switch fails, but otherwise update the state before calling the role start function so that the glue driver knows what state to configure for. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org> --- Made this msm specific because of how msm handles phy powerup. drivers/usb/chipidea/ci.h | 7 +++++-- drivers/usb/chipidea/ci_hdrc_msm.c | 4 ++++ 2 files changed, 9 insertions(+), 2 deletions(-)