diff options
| author | Huang Rui <ray.huang@amd.com> | 2013-10-03 17:37:13 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-04 00:44:51 +0200 |
| commit | 02c123ee99c793f65af2dbda17d5fe87d448f808 (patch) | |
| tree | b162941b0c565ec3119438c778e1ed32a81842fe /drivers | |
| parent | usb: ehci: use amd_chipset_type to filter for usb subsystem hang bug (diff) | |
| download | linux-02c123ee99c793f65af2dbda17d5fe87d448f808.tar.xz linux-02c123ee99c793f65af2dbda17d5fe87d448f808.zip | |
usb: ohci: use amd_chipset_type to filter for SB800 prefetch
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 SB800 prefetch routine
in AMD PLL quirk. And make it use the new chipset type to represent SB800
generation.
[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')
| -rw-r--r-- | drivers/usb/host/ohci-pci.c | 14 | ||||
| -rw-r--r-- | drivers/usb/host/pci-quirks.c | 8 | ||||
| -rw-r--r-- | drivers/usb/host/pci-quirks.h | 1 |
3 files changed, 10 insertions, 13 deletions
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c index eedf97c1790e..90879e9ccbec 100644 --- a/drivers/usb/host/ohci-pci.c +++ b/drivers/usb/host/ohci-pci.c @@ -150,28 +150,16 @@ static int ohci_quirk_nec(struct usb_hcd *hcd) static int ohci_quirk_amd700(struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci(hcd); - struct pci_dev *amd_smbus_dev; - u8 rev; if (usb_amd_find_chipset_info()) ohci->flags |= OHCI_QUIRK_AMD_PLL; - amd_smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI, - PCI_DEVICE_ID_ATI_SBX00_SMBUS, NULL); - if (!amd_smbus_dev) - return 0; - - rev = amd_smbus_dev->revision; - /* SB800 needs pre-fetch fix */ - if ((rev >= 0x40) && (rev <= 0x4f)) { + if (usb_amd_prefetch_quirk()) { ohci->flags |= OHCI_QUIRK_AMD_PREFETCH; ohci_dbg(ohci, "enabled AMD prefetch quirk\n"); } - pci_dev_put(amd_smbus_dev); - amd_smbus_dev = NULL; - return 0; } diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c index 138a55536d97..8c6c6d9036d1 100644 --- a/drivers/usb/host/pci-quirks.c +++ b/drivers/usb/host/pci-quirks.c @@ -275,6 +275,14 @@ bool usb_amd_hang_symptom_quirk(void) } EXPORT_SYMBOL_GPL(usb_amd_hang_symptom_quirk); +bool usb_amd_prefetch_quirk(void) +{ + usb_amd_find_chipset_info(); + /* SB800 needs pre-fetch fix */ + return amd_chipset.sb_type.gen == AMD_CHIPSET_SB800; +} +EXPORT_SYMBOL_GPL(usb_amd_prefetch_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 820f532f7c1c..638e88f7a28b 100644 --- a/drivers/usb/host/pci-quirks.h +++ b/drivers/usb/host/pci-quirks.h @@ -6,6 +6,7 @@ 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); +bool usb_amd_prefetch_quirk(void); void usb_amd_dev_put(void); void usb_amd_quirk_pll_disable(void); void usb_amd_quirk_pll_enable(void); |