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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>
This commit is contained in:
Grigor Tovmasyan 2018-08-29 21:01:59 +04:00 committed by Felipe Balbi
parent f3a61e4e03
commit 15d9dbf8cb
2 changed files with 25 additions and 0 deletions
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2
drivers/usb/dwc2/core.h
View File

@ -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)

23
drivers/usb/dwc2/gadget.c
View File

@ -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.
*