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Commit e8869713 authored by Vamsi Krishna Samavedam's avatar Vamsi Krishna Samavedam
Browse files

usb: dwc3: Add maximum hw supported speed flag 



Maximum hardware supported speed flag limits the maximum speed
of the usb controller to high or super. Adding this additional
flag as maximum_speed flag can be changed from different sources
such as power delivery stack.

Change-Id: I18f414e822b5525fe848a48384fac102cdae7b03
Signed-off-by: default avatarVamsi Krishna Samavedam <vskrishn@codeaurora.org>
parent a874c160

drivers/usb/dwc3/core.c

+7 −3
Original line number Diff line number Diff line
@@ -659,8 +659,10 @@ int dwc3_core_init(struct dwc3 *dwc) 
	/* Handle USB2.0-only core configuration */

	if (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) ==

			DWC3_GHWPARAMS3_SSPHY_IFC_DIS) {

		if (dwc->maximum_speed == USB_SPEED_SUPER)

			dwc->maximum_speed = USB_SPEED_HIGH;

		if (dwc->max_hw_supp_speed == USB_SPEED_SUPER) {

			dwc->max_hw_supp_speed = USB_SPEED_HIGH;

			dwc->maximum_speed = dwc->max_hw_supp_speed;

		}

	}



	ret = dwc3_core_reset(dwc);
@@ -1084,6 +1086,7 @@ static int dwc3_probe(struct platform_device *pdev) 
	hird_threshold = 12;



	dwc->maximum_speed = usb_get_maximum_speed(dev);

	dwc->max_hw_supp_speed = dwc->maximum_speed;

	dwc->dr_mode = usb_get_dr_mode(dev);



	dwc->has_lpm_erratum = device_property_read_bool(dev,
@@ -1157,6 +1160,7 @@ static int dwc3_probe(struct platform_device *pdev) 


	if (pdata) {

		dwc->maximum_speed = pdata->maximum_speed;

		dwc->max_hw_supp_speed = dwc->maximum_speed;

		dwc->has_lpm_erratum = pdata->has_lpm_erratum;

		if (pdata->lpm_nyet_threshold)

			lpm_nyet_threshold = pdata->lpm_nyet_threshold;
@@ -1190,7 +1194,7 @@ static int dwc3_probe(struct platform_device *pdev) 


	/* default to superspeed if no maximum_speed passed */

	if (dwc->maximum_speed == USB_SPEED_UNKNOWN)

		dwc->maximum_speed = USB_SPEED_SUPER;

		dwc->max_hw_supp_speed = dwc->maximum_speed = USB_SPEED_SUPER;



	dwc->lpm_nyet_threshold = lpm_nyet_threshold;

	dwc->tx_de_emphasis = tx_de_emphasis;

drivers/usb/dwc3/core.h

+3 −1
Original line number Diff line number Diff line
@@ -757,7 +757,8 @@ struct dwc3_scratchpad_array { 
 * @nr_scratch: number of scratch buffers

 * @num_event_buffers: calculated number of event buffers

 * @u1u2: only used on revisions <1.83a for workaround

 * @maximum_speed: maximum speed requested (mainly for testing purposes)

 * @maximum_speed: maximum speed to operate as requested by sw

 * @max_hw_supp_speed: maximum speed supported by hw design

 * @revision: revision register contents

 * @dr_mode: requested mode of operation

 * @usb2_phy: pointer to USB2 PHY
@@ -888,6 +889,7 @@ struct dwc3 { 
	u32			u1;

	u32			u1u2;

	u32			maximum_speed;

	u32			max_hw_supp_speed;



	/*

	 * All 3.1 IP version constants are greater than the 3.0 IP

drivers/usb/dwc3/dwc3-msm.c

+4 −0
Original line number Diff line number Diff line
@@ -2608,6 +2608,8 @@ static int dwc3_msm_id_notifier(struct notifier_block *nb, 


	speed = extcon_get_cable_state_(edev, EXTCON_USB_SPEED);

	dwc->maximum_speed = (speed <= 0) ? USB_SPEED_HIGH : USB_SPEED_SUPER;

	if (dwc->maximum_speed > dwc->max_hw_supp_speed)

		dwc->maximum_speed = dwc->max_hw_supp_speed;



	if (mdwc->id_state != id) {

		mdwc->id_state = id;
@@ -2649,6 +2651,8 @@ static int dwc3_msm_vbus_notifier(struct notifier_block *nb, 


	speed = extcon_get_cable_state_(edev, EXTCON_USB_SPEED);

	dwc->maximum_speed = (speed <= 0) ? USB_SPEED_HIGH : USB_SPEED_SUPER;

	if (dwc->maximum_speed > dwc->max_hw_supp_speed)

		dwc->maximum_speed = dwc->max_hw_supp_speed;



	mdwc->vbus_active = event;

	if (dwc->is_drd && !mdwc->in_restart) {