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Commit 15d9dbf8 authored by Grigor Tovmasyan's avatar Grigor Tovmasyan Committed by Felipe Balbi
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usb: dwc2: gadget: Program GREFCLK register 



Added dwc2_gadget_program_ref_clk function to program GREFCLK
register in device mode.

Acked-by: default avatarMinas Harutyunyan <hminas@synopsys.com>
Signed-off-by: default avatarGrigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
parent f3a61e4e

drivers/usb/dwc2/core.h

+2 −0
Original line number Diff line number Diff line
@@ -1381,6 +1381,7 @@ int dwc2_hsotg_tx_fifo_count(struct dwc2_hsotg *hsotg); 
int dwc2_hsotg_tx_fifo_total_depth(struct dwc2_hsotg *hsotg);

int dwc2_hsotg_tx_fifo_average_depth(struct dwc2_hsotg *hsotg);

void dwc2_gadget_init_lpm(struct dwc2_hsotg *hsotg);

void dwc2_gadget_program_ref_clk(struct dwc2_hsotg *hsotg);

#else

static inline int dwc2_hsotg_remove(struct dwc2_hsotg *dwc2)

{ return 0; }
@@ -1415,6 +1416,7 @@ static inline int dwc2_hsotg_tx_fifo_total_depth(struct dwc2_hsotg *hsotg) 
static inline int dwc2_hsotg_tx_fifo_average_depth(struct dwc2_hsotg *hsotg)

{ return 0; }

static inline void dwc2_gadget_init_lpm(struct dwc2_hsotg *hsotg) {}

static inline void dwc2_gadget_program_ref_clk(struct dwc2_hsotg *hsotg) {}

#endif



#if IS_ENABLED(CONFIG_USB_DWC2_HOST) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)

drivers/usb/dwc2/gadget.c

+23 −0
Original line number Diff line number Diff line
@@ -3418,6 +3418,10 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg, 
	/* configure the core to support LPM */

	dwc2_gadget_init_lpm(hsotg);



	/* program GREFCLK register if needed */

	if (using_desc_dma(hsotg) && hsotg->params.service_interval)

		dwc2_gadget_program_ref_clk(hsotg);



	/* must be at-least 3ms to allow bus to see disconnect */

	mdelay(3);
@@ -5001,6 +5005,25 @@ void dwc2_gadget_init_lpm(struct dwc2_hsotg *hsotg) 
	dev_dbg(hsotg->dev, "GLPMCFG=0x%08x\n", dwc2_readl(hsotg, GLPMCFG));

}



/**

 * dwc2_gadget_program_ref_clk - Program GREFCLK register in device mode

 *

 * @hsotg: Programming view of DWC_otg controller

 *

 */

void dwc2_gadget_program_ref_clk(struct dwc2_hsotg *hsotg)

{

	u32 val = 0;



	val |= GREFCLK_REF_CLK_MODE;

	val |= hsotg->params.ref_clk_per << GREFCLK_REFCLKPER_SHIFT;

	val |= hsotg->params.sof_cnt_wkup_alert <<

	       GREFCLK_SOF_CNT_WKUP_ALERT_SHIFT;



	dwc2_writel(hsotg, val, GREFCLK);

	dev_dbg(hsotg->dev, "GREFCLK=0x%08x\n", dwc2_readl(hsotg, GREFCLK));

}



/**

 * dwc2_gadget_enter_hibernation() - Put controller in Hibernation.

 *