diff options
| author | Fabrice Gasnier <fabrice.gasnier@foss.st.com> | 2021-12-06 18:56:42 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-17 18:52:51 +0300 |
| commit | e14acb8769850fedfbfc62a64998e34348442784 (patch) | |
| tree | 8e1c33126e0203b2708911084359de9f7f5ccdfa /drivers/usb/dwc2 | |
| parent | 942cdbc168d44730c5b3349198b16b4d6da3bb81 (diff) | |
| download | linux-e14acb8769850fedfbfc62a64998e34348442784.tar.xz | |
usb: dwc2: drd: add role-switch-default-node support
When using usb-role-switch, while the usb role is not yet define
(USB_ROLE_NONE), the user may want to configure the default mode to host
or device.
Use role-switch-default-mode for that purpose.
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://lore.kernel.org/r/1638806203-6624-3-git-send-email-fabrice.gasnier@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc2')
| -rw-r--r-- | drivers/usb/dwc2/core.h | 3 | ||||
| -rw-r--r-- | drivers/usb/dwc2/drd.c | 13 |
2 files changed, 16 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index 37185eb66ae4..e2fe64239328 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -869,6 +869,8 @@ struct dwc2_hregs_backup { * - USB_DR_MODE_HOST * - USB_DR_MODE_OTG * @role_sw: usb_role_switch handle + * @role_sw_default_mode: default operation mode of controller while usb role + * is USB_ROLE_NONE * @hcd_enabled: Host mode sub-driver initialization indicator. * @gadget_enabled: Peripheral mode sub-driver initialization indicator. * @ll_hw_enabled: Status of low-level hardware resources. @@ -1065,6 +1067,7 @@ struct dwc2_hsotg { enum usb_otg_state op_state; enum usb_dr_mode dr_mode; struct usb_role_switch *role_sw; + enum usb_dr_mode role_sw_default_mode; unsigned int hcd_enabled:1; unsigned int gadget_enabled:1; unsigned int ll_hw_enabled:1; diff --git a/drivers/usb/dwc2/drd.c b/drivers/usb/dwc2/drd.c index aa6eb76f64dd..4f453ecdd8d6 100644 --- a/drivers/usb/dwc2/drd.c +++ b/drivers/usb/dwc2/drd.c @@ -24,6 +24,10 @@ static void dwc2_ovr_init(struct dwc2_hsotg *hsotg) gotgctl |= GOTGCTL_BVALOEN | GOTGCTL_AVALOEN | GOTGCTL_VBVALOEN; gotgctl |= GOTGCTL_DBNCE_FLTR_BYPASS; gotgctl &= ~(GOTGCTL_BVALOVAL | GOTGCTL_AVALOVAL | GOTGCTL_VBVALOVAL); + if (hsotg->role_sw_default_mode == USB_DR_MODE_HOST) + gotgctl |= GOTGCTL_AVALOVAL | GOTGCTL_VBVALOVAL; + else if (hsotg->role_sw_default_mode == USB_DR_MODE_PERIPHERAL) + gotgctl |= GOTGCTL_BVALOVAL | GOTGCTL_VBVALOVAL; dwc2_writel(hsotg, gotgctl, GOTGCTL); spin_unlock_irqrestore(&hsotg->lock, flags); @@ -105,6 +109,14 @@ static int dwc2_drd_role_sw_set(struct usb_role_switch *sw, enum usb_role role) spin_lock_irqsave(&hsotg->lock, flags); + if (role == USB_ROLE_NONE) { + /* default operation mode when usb role is USB_ROLE_NONE */ + if (hsotg->role_sw_default_mode == USB_DR_MODE_HOST) + role = USB_ROLE_HOST; + else if (hsotg->role_sw_default_mode == USB_DR_MODE_PERIPHERAL) + role = USB_ROLE_DEVICE; + } + if (role == USB_ROLE_HOST) { already = dwc2_ovr_avalid(hsotg, true); } else if (role == USB_ROLE_DEVICE) { @@ -146,6 +158,7 @@ int dwc2_drd_init(struct dwc2_hsotg *hsotg) if (!device_property_read_bool(hsotg->dev, "usb-role-switch")) return 0; + hsotg->role_sw_default_mode = usb_get_role_switch_default_mode(hsotg->dev); role_sw_desc.driver_data = hsotg; role_sw_desc.fwnode = dev_fwnode(hsotg->dev); role_sw_desc.set = dwc2_drd_role_sw_set; |