40 lines
1.5 KiB
Diff
40 lines
1.5 KiB
Diff
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From 0dd387f3d3d1184fe45b57afbe73796e2ebe8d39 Mon Sep 17 00:00:00 2001
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From: P33M <P33M@github.com>
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Date: Fri, 27 Sep 2013 14:42:24 +0100
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Subject: [PATCH 095/174] dwc_otg: Don't issue traffic to LS devices in FS mode
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Issuing low-speed packets when the root port is in full-speed mode
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causes the root port to stop responding. Explicitly fail when
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enqueuing URBs to a LS endpoint on a FS bus.
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---
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drivers/usb/host/dwc_otg/dwc_otg_hcd.c | 11 +++++++++++
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1 file changed, 11 insertions(+)
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--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd.c
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+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd.c
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@@ -501,6 +501,7 @@ int dwc_otg_hcd_urb_enqueue(dwc_otg_hcd_
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dwc_otg_transaction_type_e tr_type;
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dwc_otg_qtd_t *qtd;
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gintmsk_data_t intr_mask = {.d32 = 0 };
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+ hprt0_data_t hprt0 = { .d32 = 0 };
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#ifdef DEBUG /* integrity checks (Broadcom) */
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if (NULL == hcd->core_if) {
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@@ -515,6 +516,16 @@ int dwc_otg_hcd_urb_enqueue(dwc_otg_hcd_
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return -DWC_E_NO_DEVICE;
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}
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+ /* Some core configurations cannot support LS traffic on a FS root port */
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+ if ((hcd->fops->speed(hcd, dwc_otg_urb->priv) == USB_SPEED_LOW) &&
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+ (hcd->core_if->hwcfg2.b.fs_phy_type == 1) &&
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+ (hcd->core_if->hwcfg2.b.hs_phy_type == 1)) {
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+ hprt0.d32 = DWC_READ_REG32(hcd->core_if->host_if->hprt0);
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+ if (hprt0.b.prtspd == DWC_HPRT0_PRTSPD_FULL_SPEED) {
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+ return -DWC_E_NO_DEVICE;
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+ }
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+ }
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+
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qtd = dwc_otg_hcd_qtd_create(dwc_otg_urb, atomic_alloc);
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if (qtd == NULL) {
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DWC_ERROR("DWC OTG HCD URB Enqueue failed creating QTD\n");
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