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dwc_otg: Don't issue traffic to LS devices in FS mode #390

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Merged
merged 1 commit into from
Oct 2, 2013
Merged

dwc_otg: Don't issue traffic to LS devices in FS mode #390

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11 changes: 11 additions & 0 deletions drivers/usb/host/dwc_otg/dwc_otg_hcd.c
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Original file line number Diff line number Diff line change
Expand Up @@ -501,6 +501,7 @@ int dwc_otg_hcd_urb_enqueue(dwc_otg_hcd_t * hcd,
dwc_otg_transaction_type_e tr_type;
dwc_otg_qtd_t *qtd;
gintmsk_data_t intr_mask = {.d32 = 0 };
hprt0_data_t hprt0 = { .d32 = 0 };

#ifdef DEBUG /* integrity checks (Broadcom) */
if (NULL == hcd->core_if) {
Expand All @@ -515,6 +516,16 @@ int dwc_otg_hcd_urb_enqueue(dwc_otg_hcd_t * hcd,
return -DWC_E_NO_DEVICE;
}

/* Some core configurations cannot support LS traffic on a FS root port */
if ((hcd->fops->speed(hcd, dwc_otg_urb->priv) == USB_SPEED_LOW) &&
(hcd->core_if->hwcfg2.b.fs_phy_type == 1) &&
(hcd->core_if->hwcfg2.b.hs_phy_type == 1)) {
hprt0.d32 = DWC_READ_REG32(hcd->core_if->host_if->hprt0);
if (hprt0.b.prtspd == DWC_HPRT0_PRTSPD_FULL_SPEED) {
return -DWC_E_NO_DEVICE;
}
}

qtd = dwc_otg_hcd_qtd_create(dwc_otg_urb, atomic_alloc);
if (qtd == NULL) {
DWC_ERROR("DWC OTG HCD URB Enqueue failed creating QTD\n");
Expand Down