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Date: Thu, 7 Jan 2016 16:04:51 -0800 From: Babu Moger <babu.moger@...cle.com> To: mathias.nyman@...el.com Cc: gregkh@...uxfoundation.org, linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org, babu.moger@...cle.com Subject: [PATCH v2] drivers/usb: Skip auto handoff for TI and RENESAS usb controllers I have never seen auto handoff working on TI and RENESAS cards. Eventually, we force handoff. This code forces the handoff unconditionally. It saves 5 seconds boot time for each card. Changes v0 -> v1 Made changes per comments from Greg KH. Extra space removal in assignment Added both vendor and device id checks. Signed-off-by: Babu Moger <babu.moger@...cle.com> --- drivers/usb/host/pci-quirks.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c index f940056..0915f44 100644 --- a/drivers/usb/host/pci-quirks.c +++ b/drivers/usb/host/pci-quirks.c @@ -1003,6 +1003,14 @@ static void quirk_usb_handoff_xhci(struct pci_dev *pdev) ext_cap_offset = xhci_find_next_cap_offset(base, ext_cap_offset); } while (1); + /* Auto handoff never worked for these devices. Force it and continue */ + if ((pdev->vendor == PCI_VENDOR_ID_TI && pdev->device == 0x8241) || + (pdev->vendor == PCI_VENDOR_ID_RENESAS + && pdev->device == 0x0014)) { + val = (val | XHCI_HC_OS_OWNED) & ~XHCI_HC_BIOS_OWNED; + writel(val, base + ext_cap_offset); + } + /* If the BIOS owns the HC, signal that the OS wants it, and wait */ if (val & XHCI_HC_BIOS_OWNED) { writel(val | XHCI_HC_OS_OWNED, base + ext_cap_offset); -- 1.7.1
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