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usb: ehci: use amd_chipset_type to filter for usb subsystem hang bug
Commit "usb: pci-quirks: refactor AMD quirk to abstract AMD chipset types" introduced a new AMD chipset type to filter AMD platforms with different chipsets. According to a recent thread [1], this patch updates USB subsystem hang symptom quirk which is observed on AMD all SB600 and SB700 revision 0x3a/0x3b. And make it use the new chipset type to represent. [1] http://marc.info/?l=linux-usb&m=138012321616452&w=2 Signed-off-by: Huang Rui <ray.huang@amd.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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cccd3a258e
commit
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3 changed files with 20 additions and 18 deletions
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@ -58,8 +58,6 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
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struct pci_dev *p_smbus;
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u8 rev;
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u32 temp;
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int retval;
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@ -175,23 +173,13 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
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/* SB600 and old version of SB700 have a bug in EHCI controller,
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* which causes usb devices lose response in some cases.
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*/
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if ((pdev->device == 0x4386) || (pdev->device == 0x4396)) {
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p_smbus = pci_get_device(PCI_VENDOR_ID_ATI,
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PCI_DEVICE_ID_ATI_SBX00_SMBUS,
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NULL);
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if (!p_smbus)
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break;
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rev = p_smbus->revision;
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if ((pdev->device == 0x4386) || (rev == 0x3a)
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|| (rev == 0x3b)) {
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if ((pdev->device == 0x4386 || pdev->device == 0x4396) &&
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usb_amd_hang_symptom_quirk()) {
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u8 tmp;
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ehci_info(ehci, "applying AMD SB600/SB700 USB "
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"freeze workaround\n");
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ehci_info(ehci, "applying AMD SB600/SB700 USB freeze workaround\n");
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pci_read_config_byte(pdev, 0x53, &tmp);
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pci_write_config_byte(pdev, 0x53, tmp | (1<<3));
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}
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pci_dev_put(p_smbus);
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}
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break;
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case PCI_VENDOR_ID_NETMOS:
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/* MosChip frame-index-register bug */
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@ -262,6 +262,19 @@ int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *pdev)
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}
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EXPORT_SYMBOL_GPL(usb_hcd_amd_remote_wakeup_quirk);
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bool usb_amd_hang_symptom_quirk(void)
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{
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u8 rev;
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usb_amd_find_chipset_info();
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rev = amd_chipset.sb_type.rev;
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/* SB600 and old version of SB700 have hang symptom bug */
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return amd_chipset.sb_type.gen == AMD_CHIPSET_SB600 ||
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(amd_chipset.sb_type.gen == AMD_CHIPSET_SB700 &&
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rev >= 0x3a && rev <= 0x3b);
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}
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EXPORT_SYMBOL_GPL(usb_amd_hang_symptom_quirk);
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/*
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* The hardware normally enables the A-link power management feature, which
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* lets the system lower the power consumption in idle states.
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@ -5,6 +5,7 @@
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void uhci_reset_hc(struct pci_dev *pdev, unsigned long base);
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int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base);
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int usb_amd_find_chipset_info(void);
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bool usb_amd_hang_symptom_quirk(void);
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void usb_amd_dev_put(void);
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void usb_amd_quirk_pll_disable(void);
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void usb_amd_quirk_pll_enable(void);
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