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Commit 411ce1fd authored by Pratham Pratap's avatar Pratham Pratap
Browse files

usb: dwc3: Enable multiple UDC support 



Allow binding between UDC and gadget driver to take
place based on usb-core-id.Since only one instance of
USB power-supply can exist, user can pass qcom,psy-not-used
with other instances of dwc3 which will be by default in
host mode. User can change the mode later using sysfs.
Eg:
 echo peripheral > /sys/devices/soc/7600000.hsusb/mode (Device)
 echo host > /sys/devices/soc/7600000.hsusb/mode (Host)
 echo none > /sys/devices/soc/7600000.hsusb/mode (Disconnect)

Change-Id: I965ba0950e9ef647d8e8fec0b2f4e0c7987329a6
Signed-off-by: default avatarPratham Pratap <prathampratap@codeaurora.org>
parent 79459f1b

Documentation/devicetree/bindings/usb/msm-ssusb.txt

+1 −0
Original line number Diff line number Diff line
@@ -52,6 +52,7 @@ Optional properties : 
  runtimePM state of host.

- qcom,psy-not-used: If present then driver won't be registering usb power_supply.

  Without usb_psy, user should be able to change modes using sysfs.

- qcom,usb-core-id: Differentiates between primary and secondary controller.



Sub nodes:

- Sub node for "DWC3- USB3 controller".

drivers/usb/dwc3/core.c

+6 −0
Original line number Diff line number Diff line
@@ -783,6 +783,7 @@ static int dwc3_probe(struct platform_device *pdev) 
	u8			lpm_nyet_threshold;

	u8			hird_threshold;

	u32			num_evt_buffs;

	u32			core_id;

	int			irq;



	int			ret;
@@ -896,6 +897,11 @@ static int dwc3_probe(struct platform_device *pdev) 
		if (!ret)

			dwc->num_gsi_event_buffers = num_evt_buffs;



		ret = of_property_read_u32(node,

				"qcom,usb-core-id", &core_id);

		if (!ret)

			dwc->core_id = core_id;



		if (dwc->enable_bus_suspend) {

			pm_runtime_set_autosuspend_delay(dev, 500);

			pm_runtime_use_autosuspend(dev);

drivers/usb/dwc3/core.h

+1 −0
Original line number Diff line number Diff line
@@ -881,6 +881,7 @@ struct dwc3 { 
	u32			num_event_buffers;

	u32			num_normal_event_buffers;

	u32			num_gsi_event_buffers;

	u32			core_id;



	u32			u1;

	u32			u1u2;

drivers/usb/dwc3/dwc3-msm.c

+10 −0
Original line number Diff line number Diff line
@@ -3249,6 +3249,16 @@ static int dwc3_msm_probe(struct platform_device *pdev) 
		dwc3_ext_event_notify(mdwc);

	}



	/* If the controller is in DRD mode and USB power supply

	 * is not used make the default mode of contoller as HOST

	 * mode. User can change it later using sysfs

	 */

	if (dwc->is_drd && mdwc->psy_not_used) {

		dev_dbg(&pdev->dev, "DWC3 in host mode\n");

		mdwc->id_state = DWC3_ID_GROUND;

		dwc3_ext_event_notify(mdwc);

	}



	return 0;



put_dwc3:

drivers/usb/dwc3/gadget.c

+3 −0
Original line number Diff line number Diff line
@@ -3690,6 +3690,9 @@ int dwc3_gadget_init(struct dwc3 *dwc) 
	 * sure we're starting from a well known location.

	 */



	dwc->gadget.usb_core_id = dwc->core_id;

	dev_dbg(dwc->dev, "%s core_id : %d\n", __func__, dwc->core_id);



	ret = dwc3_gadget_init_endpoints(dwc);

	if (ret)

		goto err4;