diff options
Diffstat (limited to 'drivers/usb/host/dwc2.c')
| -rw-r--r-- | drivers/usb/host/dwc2.c | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c index 413845c..291e4a5 100644 --- a/drivers/usb/host/dwc2.c +++ b/drivers/usb/host/dwc2.c @@ -776,7 +776,7 @@ static int dwc2_eptype[] = { static int transfer_chunk(struct dwc2_hc_regs *hc_regs, void *aligned_buffer, int *pid, int in, void *buffer, int num_packets, - int xfer_len, int *actual_len) + int xfer_len, int *actual_len, int odd_frame) { int ret = 0; uint32_t sub; @@ -804,8 +804,10 @@ static int transfer_chunk(struct dwc2_hc_regs *hc_regs, void *aligned_buffer, /* Set host channel enable after all other setup is complete. */ clrsetbits_le32(&hc_regs->hcchar, DWC2_HCCHAR_MULTICNT_MASK | - DWC2_HCCHAR_CHEN | DWC2_HCCHAR_CHDIS, + DWC2_HCCHAR_CHEN | DWC2_HCCHAR_CHDIS | + DWC2_HCCHAR_ODDFRM, (1 << DWC2_HCCHAR_MULTICNT_OFFSET) | + (odd_frame << DWC2_HCCHAR_ODDFRM_OFFSET) | DWC2_HCCHAR_CHEN); ret = wait_for_chhltd(hc_regs, &sub, pid); @@ -831,6 +833,7 @@ int chunk_msg(struct dwc2_priv *priv, struct usb_device *dev, { struct dwc2_core_regs *regs = priv->regs; struct dwc2_hc_regs *hc_regs = ®s->hc_regs[DWC2_HC_CHANNEL]; + struct dwc2_host_regs *host_regs = ®s->host_regs; int devnum = usb_pipedevice(pipe); int ep = usb_pipeendpoint(pipe); int max = usb_maxpacket(dev, pipe); @@ -843,6 +846,7 @@ int chunk_msg(struct dwc2_priv *priv, struct usb_device *dev, uint32_t num_packets; int stop_transfer = 0; uint32_t max_xfer_len; + int ssplit_frame_num = 0; debug("%s: msg: pipe %lx pid %d in %d len %d\n", __func__, pipe, *pid, in, len); @@ -881,6 +885,7 @@ int chunk_msg(struct dwc2_priv *priv, struct usb_device *dev, do { int actual_len = 0; uint32_t hcint; + int odd_frame = 0; xfer_len = len - done; if (xfer_len > max_xfer_len) @@ -895,19 +900,32 @@ int chunk_msg(struct dwc2_priv *priv, struct usb_device *dev, else if (do_split) clrbits_le32(&hc_regs->hcsplt, DWC2_HCSPLT_COMPSPLT); + if (eptype == DWC2_HCCHAR_EPTYPE_INTR) { + int uframe_num = readl(&host_regs->hfnum); + if (!(uframe_num & 0x1)) + odd_frame = 1; + } + ret = transfer_chunk(hc_regs, priv->aligned_buffer, pid, in, (char *)buffer + done, num_packets, - xfer_len, &actual_len); + xfer_len, &actual_len, odd_frame); hcint = readl(&hc_regs->hcint); if (complete_split) { stop_transfer = 0; - if (hcint & DWC2_HCINT_NYET) + if (hcint & DWC2_HCINT_NYET) { ret = 0; - else + int frame_num = DWC2_HFNUM_MAX_FRNUM & + readl(&host_regs->hfnum); + if (((frame_num - ssplit_frame_num) & + DWC2_HFNUM_MAX_FRNUM) > 4) + ret = -EAGAIN; + } else complete_split = 0; } else if (do_split) { if (hcint & DWC2_HCINT_ACK) { + ssplit_frame_num = DWC2_HFNUM_MAX_FRNUM & + readl(&host_regs->hfnum); ret = 0; complete_split = 1; } |