@@ -2351,6 +2351,7 @@ static int dwc3_probe(struct platform_device *pdev)
return -ENOMEM;
dwc->dev = &pdev->dev;
+ dwc->glue_ops = NULL;
probe_data.dwc = dwc;
probe_data.res = res;
@@ -992,6 +992,17 @@ struct dwc3_scratchpad_array {
__le64 dma_adr[DWC3_MAX_HIBER_SCRATCHBUFS];
};
+/*
+ * struct dwc3_glue_ops - The ops indicate the notifications that
+ * need to be passed on to glue layer
+ * @notify_set_role: Notify glue of role switch notifications
+ * @notify_run_stop: Notify run stop enable/disable information to glue
+ */
+struct dwc3_glue_ops {
+ void (*notify_set_role)(struct dwc3 *dwc, enum usb_role role);
+ void (*notify_run_stop)(struct dwc3 *dwc, bool is_on);
+};
+
/**
* struct dwc3 - representation of our controller
* @drd_work: workqueue used for role swapping
@@ -1168,6 +1179,7 @@ struct dwc3_scratchpad_array {
* @wakeup_pending_funcs: Indicates whether any interface has requested for
* function wakeup in bitmap format where bit position
* represents interface_id.
+ * @glue_ops: Vendor callbacks for flattened device implementations.
*/
struct dwc3 {
struct work_struct drd_work;
@@ -1400,6 +1412,8 @@ struct dwc3 {
struct dentry *debug_root;
u32 gsbuscfg0_reqinfo;
u32 wakeup_pending_funcs;
+
+ struct dwc3_glue_ops *glue_ops;
};
#define INCRX_BURST_MODE 0
@@ -1614,6 +1628,18 @@ void dwc3_event_buffers_cleanup(struct dwc3 *dwc);
int dwc3_core_soft_reset(struct dwc3 *dwc);
void dwc3_enable_susphy(struct dwc3 *dwc, bool enable);
+static inline void dwc3_notify_set_role(struct dwc3 *dwc, enum usb_role role)
+{
+ if (dwc->glue_ops && dwc->glue_ops->notify_set_role)
+ dwc->glue_ops->notify_set_role(dwc, role);
+}
+
+static inline void dwc3_notify_run_stop(struct dwc3 *dwc, bool is_on)
+{
+ if (dwc->glue_ops && dwc->glue_ops->notify_run_stop)
+ dwc->glue_ops->notify_run_stop(dwc, is_on);
+}
+
#if IS_ENABLED(CONFIG_USB_DWC3_HOST) || IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)
int dwc3_host_init(struct dwc3 *dwc);
void dwc3_host_exit(struct dwc3 *dwc);
@@ -464,6 +464,7 @@ static int dwc3_usb_role_switch_set(struct usb_role_switch *sw,
break;
}
+ dwc3_notify_set_role(dwc, role);
dwc3_set_mode(dwc, mode);
return 0;
}
@@ -2641,6 +2641,7 @@ static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on)
if (saved_config)
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
+ dwc3_notify_run_stop(dwc, is_on);
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
if (is_on) {
if (DWC3_VER_IS_WITHIN(DWC3, ANY, 187A)) {
In certain situations like role switching, the glue layers need to be informed of these events, so that they can take any necessary action. But in non-flattened implementations, the glue drivers have no data on when the core driver probe was successful post invoking of_platform_ populate. Now that the core driver supports flattened implementations as well, introduce vendor callbacks that can be passed on from glue to core before invoking dwc3_core_probe. Introduce callbacks to notify glue layer of role_switch and run_stop changes. These can be used by flattened implementation of Qualcomm glue layer to generate connect/disconnect events in controller during cable connect and run stop modifications by udc in device mode. Signed-off-by: Krishna Kurapati <krishna.kurapati@oss.qualcomm.com> --- drivers/usb/dwc3/core.c | 1 + drivers/usb/dwc3/core.h | 26 ++++++++++++++++++++++++++ drivers/usb/dwc3/drd.c | 1 + drivers/usb/dwc3/gadget.c | 1 + 4 files changed, 29 insertions(+)