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usb: ohci: use amd_chipset_type to filter for SB800 prefetch

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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>
This commit is contained in:
Huang Rui 2013-10-03 23:37:13 +08:00 committed by Greg Kroah-Hartman
parent 3ad145b62a
commit 02c123ee99
3 changed files with 10 additions and 13 deletions
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14
drivers/usb/host/ohci-pci.c
View File

@ -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;
}

8
drivers/usb/host/pci-quirks.c
View File

@ -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.

1
drivers/usb/host/pci-quirks.h
View File

@ -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);