diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/dwc2/core.h | 4 | ||||
| -rw-r--r-- | drivers/usb/dwc2/hcd.c | 29 |
2 files changed, 33 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index 64d45a2053bb..52cbea28d0e9 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -1235,12 +1235,16 @@ static inline int dwc2_hsotg_set_test_mode(struct dwc2_hsotg *hsotg, #if IS_ENABLED(CONFIG_USB_DWC2_HOST) || IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE) extern int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg); +extern int dwc2_hcd_get_future_frame_number(struct dwc2_hsotg *hsotg, int us); extern void dwc2_hcd_connect(struct dwc2_hsotg *hsotg); extern void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg, bool force); extern void dwc2_hcd_start(struct dwc2_hsotg *hsotg); #else static inline int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg) { return 0; } +static inline int dwc2_hcd_get_future_frame_number(struct dwc2_hsotg *hsotg, + int us) +{ return 0; } static inline void dwc2_hcd_connect(struct dwc2_hsotg *hsotg) {} static inline void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg, bool force) {} static inline void dwc2_hcd_start(struct dwc2_hsotg *hsotg) {} diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index f48da015fa5e..8edd0b45f41c 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -1947,6 +1947,35 @@ int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg) return (hfnum & HFNUM_FRNUM_MASK) >> HFNUM_FRNUM_SHIFT; } +int dwc2_hcd_get_future_frame_number(struct dwc2_hsotg *hsotg, int us) +{ + u32 hprt = dwc2_readl(hsotg->regs + HPRT0); + u32 hfir = dwc2_readl(hsotg->regs + HFIR); + u32 hfnum = dwc2_readl(hsotg->regs + HFNUM); + unsigned int us_per_frame; + unsigned int frame_number; + unsigned int remaining; + unsigned int interval; + unsigned int phy_clks; + + /* High speed has 125 us per (micro) frame; others are 1 ms per */ + us_per_frame = (hprt & HPRT0_SPD_MASK) ? 1000 : 125; + + /* Extract fields */ + frame_number = (hfnum & HFNUM_FRNUM_MASK) >> HFNUM_FRNUM_SHIFT; + remaining = (hfnum & HFNUM_FRREM_MASK) >> HFNUM_FRREM_SHIFT; + interval = (hfir & HFIR_FRINT_MASK) >> HFIR_FRINT_SHIFT; + + /* + * Number of phy clocks since the last tick of the frame number after + * "us" has passed. + */ + phy_clks = (interval - remaining) + + DIV_ROUND_UP(interval * us, us_per_frame); + + return dwc2_frame_num_inc(frame_number, phy_clks / interval); +} + int dwc2_hcd_is_b_host(struct dwc2_hsotg *hsotg) { return hsotg->op_state == OTG_STATE_B_HOST; |