diff options
| author | Vardan Mikayelyan <mvardan@synopsys.com> | 2016-05-26 04:07:05 +0300 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-06-21 10:49:21 +0300 |
| commit | 92d1635d781ac17fc7d886b0c126838083f3c2b9 (patch) | |
| tree | 3ac16508dc525f1eb41fd4114a848ebe350de8c5 /drivers | |
| parent | 6b58cb07a850f9b6d348feb2455b2c264a515f4a (diff) | |
| download | linux-92d1635d781ac17fc7d886b0c126838083f3c2b9.tar.xz | |
usb: dwc2: gadget: Add dwc2_gadget_incr_frame_num()
Increases and checks targeted frame number of current ep
if overrun happened, sets flag and masks with DSTS_SOFFN_LIMIT
Added following fields to struct dwc2_hsotg_ep
-target_frame: Targeted frame num to setup next ISOC transfer
-frame_overrun: Indicates SOF number overrun in DSTS
Tested-by: John Keeping <john@metanate.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/dwc2/core.h | 5 | ||||
| -rw-r--r-- | drivers/usb/dwc2/gadget.c | 19 |
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index dec0b21fc626..55160992b181 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -177,6 +177,8 @@ struct dwc2_hsotg_req; * @fifo_load: The amount of data loaded into the FIFO (periodic IN) * @last_load: The offset of data for the last start of request. * @size_loaded: The last loaded size for DxEPTSIZE for periodic IN + * @target_frame: Targeted frame num to setup next ISOC transfer + * @frame_overrun: Indicates SOF number overrun in DSTS * * This is the driver's state for each registered enpoint, allowing it * to keep track of transactions that need doing. Each endpoint has a @@ -214,6 +216,9 @@ struct dwc2_hsotg_ep { unsigned int isochronous:1; unsigned int send_zlp:1; unsigned int has_correct_parity:1; + unsigned int target_frame; +#define TARGET_FRAME_INITIAL 0xFFFFFFFF + bool frame_overrun; char name[10]; }; diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 54d242b6d2aa..b8f3661771f0 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -97,6 +97,25 @@ static inline bool using_dma(struct dwc2_hsotg *hsotg) } /** + * dwc2_gadget_incr_frame_num - Increments the targeted frame number. + * @hs_ep: The endpoint + * @increment: The value to increment by + * + * This function will also check if the frame number overruns DSTS_SOFFN_LIMIT. + * If an overrun occurs it will wrap the value and set the frame_overrun flag. + */ +static inline void dwc2_gadget_incr_frame_num(struct dwc2_hsotg_ep *hs_ep) +{ + hs_ep->target_frame += hs_ep->interval; + if (hs_ep->target_frame > DSTS_SOFFN_LIMIT) { + hs_ep->frame_overrun = 1; + hs_ep->target_frame &= DSTS_SOFFN_LIMIT; + } else { + hs_ep->frame_overrun = 0; + } +} + +/** * dwc2_hsotg_en_gsint - enable one or more of the general interrupt * @hsotg: The device state * @ints: A bitmask of the interrupts to enable |