diff options
| author | Roger Quadros <rogerq@ti.com> | 2017-04-05 13:39:31 +0300 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2017-04-11 10:58:31 +0300 |
| commit | 9840354ff429d4a392a96dff5ab6b5df609b8dc1 (patch) | |
| tree | 27cfaad3e008de499e821bf9ddf0d824345b06c0 /drivers/usb/dwc3/core.h | |
| parent | 41ce1456e1dbbc7355d0fcc10cf7c337c13def24 (diff) | |
usb: dwc3: Add dual-role support
If dr_mode is "otg" then support dual role mode of operation.
Currently this mode is only supported when an extcon handle is
present in the dwc3 device tree node. This is needed to
get the ID status events of the port.
We're using a workqueue to manage the dual-role state transitions
as the extcon notifier (dwc3_drd_notifier) is called in an atomic
context by extcon_sync() and this doesn't go well with
usb_del_gadget_udc() causing a lockdep and softirq warning.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc3/core.h')
| -rw-r--r-- | drivers/usb/dwc3/core.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 1fe23e36485f..981c77f5628e 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -785,6 +785,8 @@ struct dwc3_scratchpad_array { * @dr_mode: requested mode of operation * @current_dr_role: current role of operation when in dual-role mode * @desired_dr_role: desired role of operation when in dual-role mode + * @edev: extcon handle + * @edev_nb: extcon notifier * @hsphy_mode: UTMI phy mode, one of following: * - USBPHY_INTERFACE_MODE_UTMI * - USBPHY_INTERFACE_MODE_UTMIW @@ -898,6 +900,8 @@ struct dwc3 { enum usb_dr_mode dr_mode; u32 current_dr_role; u32 desired_dr_role; + struct extcon_dev *edev; + struct notifier_block edev_nb; enum usb_phy_interface hsphy_mode; u32 fladj; @@ -1218,6 +1222,16 @@ static inline int dwc3_send_gadget_generic_command(struct dwc3 *dwc, { return 0; } #endif +#if IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) +int dwc3_drd_init(struct dwc3 *dwc); +void dwc3_drd_exit(struct dwc3 *dwc); +#else +static inline int dwc3_drd_init(struct dwc3 *dwc) +{ return 0; } +static inline void dwc3_drd_exit(struct dwc3 *dwc) +{ } +#endif + /* power management interface */ #if !IS_ENABLED(CONFIG_USB_DWC3_HOST) int dwc3_gadget_suspend(struct dwc3 *dwc); |