diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/820-usb-0006-usb-dwc3-drd-add-usb-role-switch-class-support-for-d.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/820-usb-0006-usb-dwc3-drd-add-usb-role-switch-class-support-for-d.patch | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/820-usb-0006-usb-dwc3-drd-add-usb-role-switch-class-support-for-d.patch b/target/linux/layerscape/patches-5.4/820-usb-0006-usb-dwc3-drd-add-usb-role-switch-class-support-for-d.patch new file mode 100644 index 0000000000..aece52c6a4 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/820-usb-0006-usb-dwc3-drd-add-usb-role-switch-class-support-for-d.patch @@ -0,0 +1,103 @@ +From 8595748e58885439c7e18a11a94702378bff3b02 Mon Sep 17 00:00:00 2001 +From: Li Jun <jun.li@nxp.com> +Date: Sun, 27 Jan 2019 19:40:03 +0800 +Subject: [PATCH] usb: dwc3: drd: add usb role switch class support for dual + role swap + +Register a usb_role_switch for dual role swap if the property +"usb-role-switch" is present. + +Signed-off-by: Li Jun <jun.li@nxp.com> +--- + drivers/usb/dwc3/core.h | 2 ++ + drivers/usb/dwc3/drd.c | 47 ++++++++++++++++++++++++++++++++++++++++++++++- + 2 files changed, 48 insertions(+), 1 deletion(-) + +--- a/drivers/usb/dwc3/core.h ++++ b/drivers/usb/dwc3/core.h +@@ -25,6 +25,7 @@ + #include <linux/usb/ch9.h> + #include <linux/usb/gadget.h> + #include <linux/usb/otg.h> ++#include <linux/usb/role.h> + #include <linux/ulpi/interface.h> + + #include <linux/phy/phy.h> +@@ -1082,6 +1083,7 @@ struct dwc3 { + void __iomem *regs; + size_t regs_size; + ++ struct usb_role_switch *role_switch; + enum usb_dr_mode dr_mode; + u32 current_dr_role; + u32 desired_dr_role; +--- a/drivers/usb/dwc3/drd.c ++++ b/drivers/usb/dwc3/drd.c +@@ -476,6 +476,43 @@ static struct extcon_dev *dwc3_get_extco + return edev; + } + ++static int dwc3_usb_role_switch_set(struct device *dev, enum usb_role role) ++{ ++ u32 mode; ++ ++ switch (role) { ++ case USB_ROLE_HOST: ++ mode = DWC3_GCTL_PRTCAP_HOST; ++ break; ++ case USB_ROLE_DEVICE: ++ mode = DWC3_GCTL_PRTCAP_DEVICE; ++ break; ++ default: ++ return 0; ++ }; ++ ++ dwc3_set_mode(dev_get_drvdata(dev), mode); ++ return 0; ++} ++ ++static enum usb_role dwc3_usb_role_switch_get(struct device *dev) ++{ ++ struct dwc3 *dwc = dev_get_drvdata(dev); ++ unsigned long flags; ++ enum usb_role role; ++ ++ spin_lock_irqsave(&dwc->lock, flags); ++ role = dwc->current_dr_role; ++ spin_unlock_irqrestore(&dwc->lock, flags); ++ ++ return role; ++} ++ ++static const struct usb_role_switch_desc dwc3_role_switch = { ++ .set = dwc3_usb_role_switch_set, ++ .get = dwc3_usb_role_switch_get, ++}; ++ + int dwc3_drd_init(struct dwc3 *dwc) + { + int ret, irq; +@@ -484,7 +521,12 @@ int dwc3_drd_init(struct dwc3 *dwc) + if (IS_ERR(dwc->edev)) + return PTR_ERR(dwc->edev); + +- if (dwc->edev) { ++ if (device_property_read_bool(dwc->dev, "usb-role-switch")) { ++ dwc->role_switch = usb_role_switch_register(dwc->dev, ++ &dwc3_role_switch); ++ if (IS_ERR(dwc->role_switch)) ++ return PTR_ERR(dwc->role_switch); ++ } else if (dwc->edev) { + dwc->edev_nb.notifier_call = dwc3_drd_notifier; + ret = extcon_register_notifier(dwc->edev, EXTCON_USB_HOST, + &dwc->edev_nb); +@@ -531,6 +573,9 @@ void dwc3_drd_exit(struct dwc3 *dwc) + { + unsigned long flags; + ++ if (dwc->role_switch) ++ usb_role_switch_unregister(dwc->role_switch); ++ + if (dwc->edev) + extcon_unregister_notifier(dwc->edev, EXTCON_USB_HOST, + &dwc->edev_nb); |