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Commit f70d8216 authored by Mayank Rana's avatar Mayank Rana
Browse files

dwc3-msm: Add module param to override USB speed 



This change adds module param to override USB speed to force
USB enumeration into desired USB speed in USB device mode.

Change-Id: I01a4d1a6e3346fc340bca955c3dc3c976f2f8972
Signed-off-by: default avatarMayank Rana <mrana@codeaurora.org>
parent a3ba7da6

drivers/usb/dwc3/dwc3-msm.c

+20 −0
Original line number Original line Diff line number Diff line
@@ -69,6 +69,11 @@ static int cpu_to_affin; 
module_param(cpu_to_affin, int, S_IRUGO|S_IWUSR);

module_param(cpu_to_affin, int, S_IRUGO|S_IWUSR);

MODULE_PARM_DESC(cpu_to_affin, "affin usb irq to this cpu");

MODULE_PARM_DESC(cpu_to_affin, "affin usb irq to this cpu");





/* override for USB speed */

static int override_usb_speed;

module_param(override_usb_speed, int, 0644);

MODULE_PARM_DESC(override_usb_speed, "override for USB speed");



/* XHCI registers */

/* XHCI registers */

#define USB3_HCSPARAMS1		(0x4)

#define USB3_HCSPARAMS1		(0x4)

#define USB3_PORTSC		(0x420)

#define USB3_PORTSC		(0x420)
@@ -255,6 +260,15 @@ struct dwc3_msm { 
static void dwc3_pwr_event_handler(struct dwc3_msm *mdwc);

static void dwc3_pwr_event_handler(struct dwc3_msm *mdwc);

static int dwc3_msm_gadget_vbus_draw(struct dwc3_msm *mdwc, unsigned int mA);

static int dwc3_msm_gadget_vbus_draw(struct dwc3_msm *mdwc, unsigned int mA);

static void dwc3_msm_notify_event(struct dwc3 *dwc, unsigned int event);

static void dwc3_msm_notify_event(struct dwc3 *dwc, unsigned int event);



static inline bool is_valid_usb_speed(struct dwc3 *dwc, int speed)

{



	return (((speed == USB_SPEED_FULL) || (speed == USB_SPEED_HIGH) ||

		(speed == USB_SPEED_SUPER) || (speed == USB_SPEED_SUPER_PLUS))

		&& (speed <= dwc->maximum_speed));

}



/**

/**

 *

 *

 * Read register with debug info.

 * Read register with debug info.
@@ -2395,6 +2409,12 @@ static void dwc3_resume_work(struct work_struct *w) 
		if (dwc->maximum_speed > dwc->max_hw_supp_speed)

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

			dwc->maximum_speed = dwc->max_hw_supp_speed;

			dwc->maximum_speed = dwc->max_hw_supp_speed;





		if (override_usb_speed &&

				is_valid_usb_speed(dwc, override_usb_speed)) {

			dwc->maximum_speed = override_usb_speed;

			dbg_event(0xFF, "override_speed", override_usb_speed);

		}



		dbg_event(0xFF, "speed", dwc->maximum_speed);

		dbg_event(0xFF, "speed", dwc->maximum_speed);





		ret = extcon_get_property(edev, extcon_id,

		ret = extcon_get_property(edev, extcon_id,