diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/dwc3/ep0.c | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index b13912d5fa99..5c5086694438 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -55,20 +55,13 @@ static const char *dwc3_ep0_state_string(enum dwc3_ep0_state state) } } -static int dwc3_ep0_start_trans(struct dwc3 *dwc, u8 epnum, dma_addr_t buf_dma, - u32 len, u32 type, bool chain) +static void dwc3_ep0_prepare_one_trb(struct dwc3 *dwc, u8 epnum, + dma_addr_t buf_dma, u32 len, u32 type, bool chain) { - struct dwc3_gadget_ep_cmd_params params; struct dwc3_trb *trb; struct dwc3_ep *dep; - int ret; - dep = dwc->eps[epnum]; - if (dep->flags & DWC3_EP_BUSY) { - dwc3_trace(trace_dwc3_ep0, "%s still busy", dep->name); - return 0; - } trb = &dwc->ep0_trb[dep->free_slot]; @@ -89,15 +82,28 @@ static int dwc3_ep0_start_trans(struct dwc3 *dwc, u8 epnum, dma_addr_t buf_dma, trb->ctrl |= (DWC3_TRB_CTRL_IOC | DWC3_TRB_CTRL_LST); - if (chain) + trace_dwc3_prepare_trb(dep, trb); +} + +static int dwc3_ep0_start_trans(struct dwc3 *dwc, u8 epnum, dma_addr_t buf_dma, + u32 len, u32 type, bool chain) +{ + struct dwc3_gadget_ep_cmd_params params; + struct dwc3_ep *dep; + int ret; + + dep = dwc->eps[epnum]; + if (dep->flags & DWC3_EP_BUSY) { + dwc3_trace(trace_dwc3_ep0, "%s still busy", dep->name); return 0; + } + + dwc3_ep0_prepare_one_trb(dwc, epnum, buf_dma, len, type, chain); memset(¶ms, 0, sizeof(params)); params.param0 = upper_32_bits(dwc->ep0_trb_addr); params.param1 = lower_32_bits(dwc->ep0_trb_addr); - trace_dwc3_prepare_trb(dep, trb); - ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, DWC3_DEPCMD_STARTTRANSFER, ¶ms); if (ret < 0) { |