diff options
| author |   Huang Rui <ray.huang@amd.com> | 2013-10-03 23:37:12 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-03 15:44:50 -0700 |
| commit | 3ad145b62a15c86150dd0cc229a39a3120d462f9 (patch) | |
| tree | 2b0a5f63b7dd1cf5269dde34406861ebd5e8526c /drivers/usb | |
| parent | usb: wusbcore: fix build warning on 64-bit builds (diff) | |
| download | linux-dev-3ad145b62a15c86150dd0cc229a39a3120d462f9.tar.xz linux-dev-3ad145b62a15c86150dd0cc229a39a3120d462f9.zip | |
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>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/ehci-pci.c | 24 | ||||
| -rw-r--r-- | drivers/usb/host/pci-quirks.c | 13 | ||||
| -rw-r--r-- | drivers/usb/host/pci-quirks.h | 1 |
3 files changed, 20 insertions, 18 deletions
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c index 854c2ec7b699..3e86bf4371b3 100644 --- a/drivers/usb/host/ehci-pci.c +++ b/drivers/usb/host/ehci-pci.c @@ -58,8 +58,6 @@ static int ehci_pci_setup(struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); struct pci_dev *pdev = to_pci_dev(hcd->self.controller); - struct pci_dev *p_smbus; - u8 rev; u32 temp; int retval; @@ -175,22 +173,12 @@ static int ehci_pci_setup(struct usb_hcd *hcd) /* SB600 and old version of SB700 have a bug in EHCI controller, * which causes usb devices lose response in some cases. */ - if ((pdev->device == 0x4386) || (pdev->device == 0x4396)) { - p_smbus = pci_get_device(PCI_VENDOR_ID_ATI, - PCI_DEVICE_ID_ATI_SBX00_SMBUS, - NULL); - if (!p_smbus) - break; - rev = p_smbus->revision; - if ((pdev->device == 0x4386) || (rev == 0x3a) - || (rev == 0x3b)) { - u8 tmp; - ehci_info(ehci, "applying AMD SB600/SB700 USB " - "freeze workaround\n"); - pci_read_config_byte(pdev, 0x53, &tmp); - pci_write_config_byte(pdev, 0x53, tmp | (1<<3)); - } - pci_dev_put(p_smbus); + if ((pdev->device == 0x4386 || pdev->device == 0x4396) && + usb_amd_hang_symptom_quirk()) { + u8 tmp; + ehci_info(ehci, "applying AMD SB600/SB700 USB freeze workaround\n"); + pci_read_config_byte(pdev, 0x53, &tmp); + pci_write_config_byte(pdev, 0x53, tmp | (1<<3)); } break; case PCI_VENDOR_ID_NETMOS: diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c index 9eec463c73c5..138a55536d97 100644 --- a/drivers/usb/host/pci-quirks.c +++ b/drivers/usb/host/pci-quirks.c @@ -262,6 +262,19 @@ int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *pdev) } EXPORT_SYMBOL_GPL(usb_hcd_amd_remote_wakeup_quirk); +bool usb_amd_hang_symptom_quirk(void) +{ + u8 rev; + + usb_amd_find_chipset_info(); + rev = amd_chipset.sb_type.rev; + /* SB600 and old version of SB700 have hang symptom bug */ + return amd_chipset.sb_type.gen == AMD_CHIPSET_SB600 || + (amd_chipset.sb_type.gen == AMD_CHIPSET_SB700 && + rev >= 0x3a && rev <= 0x3b); +} +EXPORT_SYMBOL_GPL(usb_amd_hang_symptom_quirk); + /* * The hardware normally enables the A-link power management feature, which * lets the system lower the power consumption in idle states. diff --git a/drivers/usb/host/pci-quirks.h b/drivers/usb/host/pci-quirks.h index ed6700d00fe6..820f532f7c1c 100644 --- a/drivers/usb/host/pci-quirks.h +++ b/drivers/usb/host/pci-quirks.h @@ -5,6 +5,7 @@ void uhci_reset_hc(struct pci_dev *pdev, unsigned long base); int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base); int usb_amd_find_chipset_info(void); +bool usb_amd_hang_symptom_quirk(void); void usb_amd_dev_put(void); void usb_amd_quirk_pll_disable(void); void usb_amd_quirk_pll_enable(void); |