Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933401AbbDIIyp (ORCPT ); Thu, 9 Apr 2015 04:54:45 -0400 Received: from mail.kernel.org ([198.145.29.136]:42410 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755307AbbDIIyi (ORCPT ); Thu, 9 Apr 2015 04:54:38 -0400 From: lizf@kernel.org To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Arseny Solokha , Greg Kroah-Hartman , Zefan Li Subject: [PATCH 3.4 096/176] OHCI: add a quirk for ULi M5237 blocking on reset Date: Thu, 9 Apr 2015 16:45:44 +0800 Message-Id: <1428569224-23820-96-git-send-email-lizf@kernel.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1428569028-23762-1-git-send-email-lizf@kernel.org> References: <1428569028-23762-1-git-send-email-lizf@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2967 Lines: 90 From: Arseny Solokha 3.4.107-rc1 review patch. If anyone has any objections, please let me know. ------------------ commit 56abcab833fafcfaeb2f5b25e0364c1dec45f53e upstream. Commit 8dccddbc2368 ("OHCI: final fix for NVIDIA problems (I hope)") introduced into 3.1.9 broke boot on e.g. Freescale P2020DS development board. The code path that was previously specific to NVIDIA controllers had then become taken for all chips. However, the M5237 installed on the board wedges solid when accessing its base+OHCI_FMINTERVAL register, making it impossible to boot any kernel newer than 3.1.8 on this particular and apparently other similar machines. Don't readl() and writel() base+OHCI_FMINTERVAL on PCI ID 10b9:5237. The patch is suitable for the -next tree as well as all maintained kernels up to 3.2 inclusive. Signed-off-by: Arseny Solokha Acked-by: Alan Stern Signed-off-by: Greg Kroah-Hartman Signed-off-by: Zefan Li --- drivers/usb/host/pci-quirks.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c index 90dcf54..1f230ed 100644 --- a/drivers/usb/host/pci-quirks.c +++ b/drivers/usb/host/pci-quirks.c @@ -470,7 +470,8 @@ static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev) { void __iomem *base; u32 control; - u32 fminterval; + u32 fminterval = 0; + bool no_fminterval = false; int cnt; if (!mmio_resource_enabled(pdev, 0)) @@ -480,6 +481,13 @@ static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev) if (base == NULL) return; + /* + * ULi M5237 OHCI controller locks the whole system when accessing + * the OHCI_FMINTERVAL offset. + */ + if (pdev->vendor == PCI_VENDOR_ID_AL && pdev->device == 0x5237) + no_fminterval = true; + control = readl(base + OHCI_CONTROL); /* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */ @@ -518,7 +526,9 @@ static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev) } /* software reset of the controller, preserving HcFmInterval */ - fminterval = readl(base + OHCI_FMINTERVAL); + if (!no_fminterval) + fminterval = readl(base + OHCI_FMINTERVAL); + writel(OHCI_HCR, base + OHCI_CMDSTATUS); /* reset requires max 10 us delay */ @@ -527,7 +537,9 @@ static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev) break; udelay(1); } - writel(fminterval, base + OHCI_FMINTERVAL); + + if (!no_fminterval) + writel(fminterval, base + OHCI_FMINTERVAL); /* Now the controller is safely in SUSPEND and nothing can wake it up */ iounmap(base); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/