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56 lines
2.0 KiB
Diff
56 lines
2.0 KiB
Diff
From 0c988aed71773be4481b886ccf03c40a52f57cdb Mon Sep 17 00:00:00 2001
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From: P33M <p33m@github.com>
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Date: Mon, 8 Apr 2019 12:45:23 +0100
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Subject: [PATCH] dwc_otg: only do_split when we actually need to do a
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split
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The previous test would fail if the root port was in fullspeed mode
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and there was a hub between the FS device and the root port. While
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the transfer worked, the schedule mangling performed for high-speed
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split transfers would break leading to an 8ms polling interval.
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---
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drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c | 9 ++++-----
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1 file changed, 4 insertions(+), 5 deletions(-)
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--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c
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+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c
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@@ -167,8 +167,10 @@ void qh_init(dwc_otg_hcd_t * hcd, dwc_ot
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char *speed, *type;
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int dev_speed;
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uint32_t hub_addr, hub_port;
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+ hprt0_data_t hprt;
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dwc_memset(qh, 0, sizeof(dwc_otg_qh_t));
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+ hprt.d32 = DWC_READ_REG32(hcd->core_if->host_if->hprt0);
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/* Initialize QH */
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qh->ep_type = dwc_otg_hcd_get_pipe_type(&urb->pipe_info);
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@@ -191,9 +193,8 @@ void qh_init(dwc_otg_hcd_t * hcd, dwc_ot
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qh->nak_frame = 0xffff;
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- if (((dev_speed == USB_SPEED_LOW) ||
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- (dev_speed == USB_SPEED_FULL)) &&
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- (hub_addr != 0 && hub_addr != 1)) {
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+ if (hprt.b.prtspd == DWC_HPRT0_PRTSPD_HIGH_SPEED &&
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+ dev_speed != USB_SPEED_HIGH) {
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DWC_DEBUGPL(DBG_HCD,
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"QH init: EP %d: TT found at hub addr %d, for port %d\n",
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dwc_otg_hcd_get_ep_num(&urb->pipe_info), hub_addr,
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@@ -204,7 +205,6 @@ void qh_init(dwc_otg_hcd_t * hcd, dwc_ot
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if (qh->ep_type == UE_INTERRUPT || qh->ep_type == UE_ISOCHRONOUS) {
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/* Compute scheduling parameters once and save them. */
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- hprt0_data_t hprt;
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/** @todo Account for split transfers in the bus time. */
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int bytecount =
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@@ -219,7 +219,6 @@ void qh_init(dwc_otg_hcd_t * hcd, dwc_ot
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SCHEDULE_SLOP);
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qh->interval = urb->interval;
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- hprt.d32 = DWC_READ_REG32(hcd->core_if->host_if->hprt0);
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if (hprt.b.prtspd == DWC_HPRT0_PRTSPD_HIGH_SPEED) {
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if (dev_speed == USB_SPEED_LOW ||
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dev_speed == USB_SPEED_FULL) {
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