| Message ID | 20191128051001.18995-4-john.stultz@linaro.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | HiKey960 USB support | expand |
On 28/11/2019 05:09, John Stultz wrote: > Support the new role-switch-default-mode binding for configuring > the default role the controller assumes as when the usb role is > USB_ROLE_NONE > > This patch was split out from a larger patch originally by > Yu Chen <chenyu56@huawei.com> > > Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > Cc: Rob Herring <robh+dt@kernel.org> > Cc: Mark Rutland <mark.rutland@arm.com> > CC: ShuFan Lee <shufan_lee@richtek.com> > Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com> > Cc: Suzuki K Poulose <suzuki.poulose@arm.com> > Cc: Chunfeng Yun <chunfeng.yun@mediatek.com> > Cc: Yu Chen <chenyu56@huawei.com> > Cc: Felipe Balbi <balbi@kernel.org> > Cc: Hans de Goede <hdegoede@redhat.com> > Cc: Andy Shevchenko <andy.shevchenko@gmail.com> > Cc: Jun Li <lijun.kernel@gmail.com> > Cc: Valentin Schneider <valentin.schneider@arm.com> > Cc: Jack Pham <jackp@codeaurora.org> > Cc: linux-usb@vger.kernel.org > Cc: devicetree@vger.kernel.org > Signed-off-by: John Stultz <john.stultz@linaro.org> > Change-Id: Ic6e4df1109b350deaecdc69f667d49ce91d599f3 > --- > v3: Split this patch out from addition of usb-role-switch > handling > v5: Reworked to use string based role-switch-default-mode > --- > drivers/usb/dwc3/core.h | 3 +++ > drivers/usb/dwc3/drd.c | 25 ++++++++++++++++++++++--- > 2 files changed, 25 insertions(+), 3 deletions(-) > > diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h > index 6f19e9891767..3c879c9ab1aa 100644 > --- a/drivers/usb/dwc3/core.h > +++ b/drivers/usb/dwc3/core.h > @@ -953,6 +953,8 @@ struct dwc3_scratchpad_array { > * - USBPHY_INTERFACE_MODE_UTMI > * - USBPHY_INTERFACE_MODE_UTMIW > * @role_sw: usb_role_switch handle > + * @role_switch_default_mode: default operation mode of controller while > + * usb role is USB_ROLE_NONE. > * @usb2_phy: pointer to USB2 PHY > * @usb3_phy: pointer to USB3 PHY > * @usb2_generic_phy: pointer to USB2 PHY > @@ -1087,6 +1089,7 @@ struct dwc3 { > struct notifier_block edev_nb; > enum usb_phy_interface hsphy_mode; > struct usb_role_switch *role_sw; > + enum usb_dr_mode role_switch_default_mode; > > u32 fladj; > u32 irq_gadget; > diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c > index 3b57d2ddda93..865341facece 100644 > --- a/drivers/usb/dwc3/drd.c > +++ b/drivers/usb/dwc3/drd.c > @@ -491,7 +491,10 @@ static int dwc3_usb_role_switch_set(struct device *dev, enum usb_role role) > mode = DWC3_GCTL_PRTCAP_DEVICE; > break; > default: > - mode = DWC3_GCTL_PRTCAP_DEVICE; > + if (dwc->role_switch_default_mode == USB_DR_MODE_HOST) > + mode = DWC3_GCTL_PRTCAP_HOST; > + else > + mode = DWC3_GCTL_PRTCAP_DEVICE; > break; > } > > @@ -517,7 +520,10 @@ static enum usb_role dwc3_usb_role_switch_get(struct device *dev) > role = dwc->current_otg_role; > break; > default: > - role = USB_ROLE_DEVICE; > + if (dwc->role_switch_default_mode == USB_DR_MODE_HOST) > + role = USB_ROLE_HOST; > + else > + role = USB_ROLE_DEVICE; > break; > } > spin_unlock_irqrestore(&dwc->lock, flags); > @@ -527,6 +533,19 @@ static enum usb_role dwc3_usb_role_switch_get(struct device *dev) > static int dwc3_setup_role_switch(struct dwc3 *dwc) > { > struct usb_role_switch_desc dwc3_role_switch = {NULL}; > + const char *str; > + u32 mode; > + int ret; > + > + ret = device_property_read_string(dwc->dev, "role-switch-default-mode", > + &str); > + if (ret >= 0 && !strncmp(str, "host", strlen("host"))) { > + dwc->role_switch_default_mode = USB_DR_MODE_HOST; > + mode = DWC3_GCTL_PRTCAP_HOST; > + } else { > + dwc->role_switch_default_mode = USB_DR_MODE_PERIPHERAL; > + mode = DWC3_GCTL_PRTCAP_DEVICE; > + } > > dwc3_role_switch.fwnode = dev_fwnode(dwc->dev); > dwc3_role_switch.set = dwc3_usb_role_switch_set; > @@ -535,7 +554,7 @@ static int dwc3_setup_role_switch(struct dwc3 *dwc) > if (IS_ERR(dwc->role_sw)) > return PTR_ERR(dwc->role_sw); > > - dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE); > + dwc3_set_mode(dwc, mode); > return 0; > } > #else > Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 6f19e9891767..3c879c9ab1aa 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -953,6 +953,8 @@ struct dwc3_scratchpad_array { * - USBPHY_INTERFACE_MODE_UTMI * - USBPHY_INTERFACE_MODE_UTMIW * @role_sw: usb_role_switch handle + * @role_switch_default_mode: default operation mode of controller while + * usb role is USB_ROLE_NONE. * @usb2_phy: pointer to USB2 PHY * @usb3_phy: pointer to USB3 PHY * @usb2_generic_phy: pointer to USB2 PHY @@ -1087,6 +1089,7 @@ struct dwc3 { struct notifier_block edev_nb; enum usb_phy_interface hsphy_mode; struct usb_role_switch *role_sw; + enum usb_dr_mode role_switch_default_mode; u32 fladj; u32 irq_gadget; diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c index 3b57d2ddda93..865341facece 100644 --- a/drivers/usb/dwc3/drd.c +++ b/drivers/usb/dwc3/drd.c @@ -491,7 +491,10 @@ static int dwc3_usb_role_switch_set(struct device *dev, enum usb_role role) mode = DWC3_GCTL_PRTCAP_DEVICE; break; default: - mode = DWC3_GCTL_PRTCAP_DEVICE; + if (dwc->role_switch_default_mode == USB_DR_MODE_HOST) + mode = DWC3_GCTL_PRTCAP_HOST; + else + mode = DWC3_GCTL_PRTCAP_DEVICE; break; } @@ -517,7 +520,10 @@ static enum usb_role dwc3_usb_role_switch_get(struct device *dev) role = dwc->current_otg_role; break; default: - role = USB_ROLE_DEVICE; + if (dwc->role_switch_default_mode == USB_DR_MODE_HOST) + role = USB_ROLE_HOST; + else + role = USB_ROLE_DEVICE; break; } spin_unlock_irqrestore(&dwc->lock, flags); @@ -527,6 +533,19 @@ static enum usb_role dwc3_usb_role_switch_get(struct device *dev) static int dwc3_setup_role_switch(struct dwc3 *dwc) { struct usb_role_switch_desc dwc3_role_switch = {NULL}; + const char *str; + u32 mode; + int ret; + + ret = device_property_read_string(dwc->dev, "role-switch-default-mode", + &str); + if (ret >= 0 && !strncmp(str, "host", strlen("host"))) { + dwc->role_switch_default_mode = USB_DR_MODE_HOST; + mode = DWC3_GCTL_PRTCAP_HOST; + } else { + dwc->role_switch_default_mode = USB_DR_MODE_PERIPHERAL; + mode = DWC3_GCTL_PRTCAP_DEVICE; + } dwc3_role_switch.fwnode = dev_fwnode(dwc->dev); dwc3_role_switch.set = dwc3_usb_role_switch_set; @@ -535,7 +554,7 @@ static int dwc3_setup_role_switch(struct dwc3 *dwc) if (IS_ERR(dwc->role_sw)) return PTR_ERR(dwc->role_sw); - dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE); + dwc3_set_mode(dwc, mode); return 0; } #else
Support the new role-switch-default-mode binding for configuring the default role the controller assumes as when the usb role is USB_ROLE_NONE This patch was split out from a larger patch originally by Yu Chen <chenyu56@huawei.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> CC: ShuFan Lee <shufan_lee@richtek.com> Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Cc: Chunfeng Yun <chunfeng.yun@mediatek.com> Cc: Yu Chen <chenyu56@huawei.com> Cc: Felipe Balbi <balbi@kernel.org> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: Jun Li <lijun.kernel@gmail.com> Cc: Valentin Schneider <valentin.schneider@arm.com> Cc: Jack Pham <jackp@codeaurora.org> Cc: linux-usb@vger.kernel.org Cc: devicetree@vger.kernel.org Signed-off-by: John Stultz <john.stultz@linaro.org> Change-Id: Ic6e4df1109b350deaecdc69f667d49ce91d599f3 --- v3: Split this patch out from addition of usb-role-switch handling v5: Reworked to use string based role-switch-default-mode --- drivers/usb/dwc3/core.h | 3 +++ drivers/usb/dwc3/drd.c | 25 ++++++++++++++++++++++--- 2 files changed, 25 insertions(+), 3 deletions(-) -- 2.17.1