Merge "dwc3-msm: Add dwc3_msm_release_ss_lane() API" (b74745b4) · Commits · e / devices / android_kernel_fairphone_FP5

drivers/usb/dwc3/dwc3-msm.c

+60 −0

Original line number	Diff line number	Diff line
		@@ -150,6 +150,9 @@
		#define DWC3_GEVNTADRHI_EVNTADRHI_GSI_IDX(n) (n << 16)
		#define DWC3_GEVENT_TYPE_GSI 0x3

		/* BAM pipe mask */
		#define MSM_PIPE_ID_MASK (0x1F)

		enum dbm_reg {
		DBM_EP_CFG,
		DBM_DATA_FIFO,
		@@ -3738,6 +3741,63 @@ static void dwc3_init_dbm(struct dwc3_msm *mdwc)
		"qcom,reset-ep-after-lpm-resume");
		}

		static void dwc3_start_stop_host(struct dwc3_msm *mdwc, bool start)
		{
		struct dwc3 *dwc = platform_get_drvdata(mdwc->dwc3);

		if (start) {
		dbg_log_string("start host mode");
		mdwc->id_state = DWC3_ID_GROUND;
		mdwc->vbus_active = false;
		} else {
		dbg_log_string("stop_host_mode started");
		mdwc->id_state = DWC3_ID_FLOAT;
		mdwc->vbus_active = false;
		}

		dwc3_ext_event_notify(mdwc);
		dbg_event(0xFF, "flush_work", 0);
		flush_work(&mdwc->resume_work);
		drain_workqueue(mdwc->sm_usb_wq);
		if (start)
		dbg_log_string("host mode started");
		else
		dbg_log_string("stop_host_mode completed");
		}

		int dwc3_msm_release_ss_lane(struct device *dev)
		{
		struct dwc3_msm *mdwc = dev_get_drvdata(dev);
		struct dwc3 *dwc = NULL;

		if (mdwc == NULL) {
		dev_err(dev, "dwc3-msm is not initialized yet.\n");
		return -EAGAIN;
		}

		dwc = platform_get_drvdata(mdwc->dwc3);
		if (dwc == NULL) {
		dev_err(dev, "dwc3 controller is not initialized yet.\n");
		return -EAGAIN;
		}

		dbg_event(0xFF, "ss_lane_release", 0);
		if (mdwc->id_state != DWC3_ID_GROUND) {
		dbg_log_string("USB host mode is not active");
		return 0;
		}

		/* stop USB host mode */
		dwc3_start_stop_host(mdwc, false);

		/* restart USB host mode into high speed */
		dwc->maximum_speed = USB_SPEED_HIGH;
		dwc3_start_stop_host(mdwc, true);

		return 0;
		}
		EXPORT_SYMBOL(dwc3_msm_release_ss_lane);

		static int dwc3_msm_probe(struct platform_device *pdev)
		{
		struct device_node node = pdev->dev.of_node, dwc3_node;

include/linux/usb/dwc3-msm.h

+3 −1

Original line number	Diff line number	Diff line
		@@ -22,7 +22,6 @@
		* These bit fields are set by function drivers that wish to queue
		* usb_requests with sps/bam parameters.
		*/
		#define MSM_PIPE_ID_MASK (0x1F)
		#define MSM_TX_PIPE_ID_OFS (16)
		#define MSM_SPS_MODE BIT(5)
		#define MSM_IS_FINITE_TRANSFER BIT(6)
		@@ -121,6 +120,7 @@ int msm_data_fifo_config(struct usb_ep *ep, unsigned long addr, u32 size,
		u8 dst_pipe_idx);
		bool msm_dwc3_reset_ep_after_lpm(struct usb_gadget *gadget);
		int msm_dwc3_reset_dbm_ep(struct usb_ep *ep);
		int dwc3_msm_release_ss_lane(struct device *dev);
		#else
		static inline struct usb_ep *usb_ep_autoconfig_by_name(
		struct usb_gadget gadget, struct usb_endpoint_descriptor desc,
		@@ -146,6 +146,8 @@ static inline bool msm_dwc3_reset_ep_after_lpm(struct usb_gadget *gadget)
		{ return false; }
		static inline int msm_dwc3_reset_dbm_ep(struct usb_ep *ep)
		{ return -ENODEV; }
		static inline int dwc3_msm_release_ss_lane(struct device *dev)
		{ return -ENODEV; }
		#endif

		#endif /* __LINUX_USB_DWC3_MSM_H */