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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: Minas Harutyunyan <hminas@synopsys.com> Signed-off-by: Grigor Tovmasyan <tovmasya@synopsys.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
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2 changed files with 25 additions and 0 deletions
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@ -1381,6 +1381,7 @@ int dwc2_hsotg_tx_fifo_count(struct dwc2_hsotg *hsotg);
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int dwc2_hsotg_tx_fifo_total_depth(struct dwc2_hsotg *hsotg);
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int dwc2_hsotg_tx_fifo_average_depth(struct dwc2_hsotg *hsotg);
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void dwc2_gadget_init_lpm(struct dwc2_hsotg *hsotg);
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void dwc2_gadget_program_ref_clk(struct dwc2_hsotg *hsotg);
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#else
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static inline int dwc2_hsotg_remove(struct dwc2_hsotg *dwc2)
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{ return 0; }
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@ -1415,6 +1416,7 @@ static inline int dwc2_hsotg_tx_fifo_total_depth(struct dwc2_hsotg *hsotg)
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static inline int dwc2_hsotg_tx_fifo_average_depth(struct dwc2_hsotg *hsotg)
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{ return 0; }
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static inline void dwc2_gadget_init_lpm(struct dwc2_hsotg *hsotg) {}
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static inline void dwc2_gadget_program_ref_clk(struct dwc2_hsotg *hsotg) {}
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#endif
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#if IS_ENABLED(CONFIG_USB_DWC2_HOST) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
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@ -3418,6 +3418,10 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
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/* configure the core to support LPM */
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dwc2_gadget_init_lpm(hsotg);
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/* program GREFCLK register if needed */
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if (using_desc_dma(hsotg) && hsotg->params.service_interval)
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dwc2_gadget_program_ref_clk(hsotg);
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/* must be at-least 3ms to allow bus to see disconnect */
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mdelay(3);
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@ -5001,6 +5005,25 @@ void dwc2_gadget_init_lpm(struct dwc2_hsotg *hsotg)
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dev_dbg(hsotg->dev, "GLPMCFG=0x%08x\n", dwc2_readl(hsotg, GLPMCFG));
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}
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/**
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* dwc2_gadget_program_ref_clk - Program GREFCLK register in device mode
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*
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* @hsotg: Programming view of DWC_otg controller
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*
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*/
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void dwc2_gadget_program_ref_clk(struct dwc2_hsotg *hsotg)
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{
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u32 val = 0;
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val |= GREFCLK_REF_CLK_MODE;
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val |= hsotg->params.ref_clk_per << GREFCLK_REFCLKPER_SHIFT;
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val |= hsotg->params.sof_cnt_wkup_alert <<
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GREFCLK_SOF_CNT_WKUP_ALERT_SHIFT;
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dwc2_writel(hsotg, val, GREFCLK);
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dev_dbg(hsotg->dev, "GREFCLK=0x%08x\n", dwc2_readl(hsotg, GREFCLK));
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}
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/**
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* dwc2_gadget_enter_hibernation() - Put controller in Hibernation.
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*
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