A bunch of miscellaneous debug messages to aid in working out USB issues.
Signed-off-by: Hector Martin marcan@marcan.st --- drivers/usb/host/xhci-ring.c | 29 ++++++++++++++++++++++++++--- 1 file changed, 26 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index b60661fe05e7..dabe6cf86af2 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -214,6 +214,9 @@ static dma_addr_t queue_trb(struct xhci_ctrl *ctrl, struct xhci_ring *ring,
addr = xhci_trb_virt_to_dma(ring->enq_seg, (union xhci_trb *)trb);
+ debug("trb @ %llx: %08x %08x %08x %08x\n", addr, + trb_fields[0], trb_fields[1], trb_fields[2], trb_fields[3]); + inc_enq(ctrl, ring, more_trbs_coming);
return addr; @@ -296,6 +299,8 @@ void xhci_queue_command(struct xhci_ctrl *ctrl, dma_addr_t addr, u32 slot_id, { u32 fields[4];
+ debug("CMD: %llx 0x%x 0x%x %d\n", addr, slot_id, ep_index, cmd); + BUG_ON(prepare_ring(ctrl, ctrl->cmd_ring, EP_STATE_RUNNING));
fields[0] = lower_32_bits(addr); @@ -471,8 +476,14 @@ union xhci_trb *xhci_wait_for_event(struct xhci_ctrl *ctrl, trb_type expected)
type = TRB_FIELD_TO_TYPE(le32_to_cpu(event->event_cmd.flags)); if (type == expected || - (expected == TRB_NONE && type != TRB_PORT_STATUS)) + (expected == TRB_NONE && type != TRB_PORT_STATUS)) { + debug("Event: %08x %08x %08x %08x\n", + le32_to_cpu(event->generic.field[0]), + le32_to_cpu(event->generic.field[1]), + le32_to_cpu(event->generic.field[2]), + le32_to_cpu(event->generic.field[3])); return event; + }
if (type == TRB_PORT_STATUS) /* TODO: remove this once enumeration has been reworked */ @@ -484,8 +495,9 @@ union xhci_trb *xhci_wait_for_event(struct xhci_ctrl *ctrl, trb_type expected) le32_to_cpu(event->generic.field[2])) != COMP_SUCCESS); else - printf("Unexpected XHCI event TRB, skipping... " + printf("Unexpected XHCI event TRB, expected %d... " "(%08x %08x %08x %08x)\n", + expected, le32_to_cpu(event->generic.field[0]), le32_to_cpu(event->generic.field[1]), le32_to_cpu(event->generic.field[2]), @@ -602,10 +614,13 @@ static void abort_td(struct usb_device *udev, int ep_index) static void record_transfer_result(struct usb_device *udev, union xhci_trb *event, int length) { + xhci_comp_code code = GET_COMP_CODE( + le32_to_cpu(event->trans_event.transfer_len)); + udev->act_len = min(length, length - (int)EVENT_TRB_LEN(le32_to_cpu(event->trans_event.transfer_len)));
- switch (GET_COMP_CODE(le32_to_cpu(event->trans_event.transfer_len))) { + switch (code) { case COMP_SUCCESS: BUG_ON(udev->act_len != length); /* fallthrough */ @@ -613,16 +628,23 @@ static void record_transfer_result(struct usb_device *udev, udev->status = 0; break; case COMP_STALL: + debug("Xfer STALL\n"); udev->status = USB_ST_STALLED; break; case COMP_DB_ERR: + debug("Xfer DB_ERR\n"); + udev->status = USB_ST_BUF_ERR; + break; case COMP_TRB_ERR: + debug("Xfer TRB_ERR\n"); udev->status = USB_ST_BUF_ERR; break; case COMP_BABBLE: + debug("Xfer BABBLE\n"); udev->status = USB_ST_BABBLE_DET; break; default: + debug("Xfer error: %d\n", code); udev->status = 0x80; /* USB_ST_TOO_LAZY_TO_MAKE_A_NEW_MACRO */ } } @@ -1016,6 +1038,7 @@ int xhci_ctrl_tx(struct usb_device *udev, unsigned long pipe, record_transfer_result(udev, event, length); xhci_acknowledge_event(ctrl); if (udev->status == USB_ST_STALLED) { + debug("EP %d stalled\n", ep_index); reset_ep(udev, ep_index); return -EPIPE; }