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usb: pci-quirks: Minor cleanup for AMD PLL quirk

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usb_amd_find_chipset_info() is used for chipset detection for
several quirks. It is strange that its return value indicates
the need for the PLL quirk, which means it is often ignored.
This patch adds a function specifically for checking the PLL
quirk like the other ones. Additionally, rename probe_result to
something more appropriate.

Signed-off-by: Ryan Kennedy <ryan5544@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20190704153529.9429-3-ryan5544@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ryan Kennedy 2019-07-04 11:35:29 -04:00 committed by Greg Kroah-Hartman
parent f3dccdaade
commit 4fbb8aa758
5 changed files with 21 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/usb/host/ehci-pci.c
View File

@ -149,7 +149,7 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
break;
case PCI_VENDOR_ID_AMD:
/* AMD PLL quirk */
if (usb_amd_find_chipset_info())
if (usb_amd_quirk_pll_check())
ehci->amd_pll_fix = 1;
/* AMD8111 EHCI doesn't work, according to AMD errata */
if (pdev->device == 0x7463) {
@ -186,7 +186,7 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
break;
case PCI_VENDOR_ID_ATI:
/* AMD PLL quirk */
if (usb_amd_find_chipset_info())
if (usb_amd_quirk_pll_check())
ehci->amd_pll_fix = 1;
/*

2
drivers/usb/host/ohci-pci.c
View File

@ -152,7 +152,7 @@ static int ohci_quirk_amd700(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
if (usb_amd_find_chipset_info())
if (usb_amd_quirk_pll_check())
ohci->flags |= OHCI_QUIRK_AMD_PLL;
/* SB800 needs pre-fetch fix */

30
drivers/usb/host/pci-quirks.c
View File

@ -132,7 +132,7 @@ static struct amd_chipset_info {
struct amd_chipset_type sb_type;
int isoc_reqs;
int probe_count;
int probe_result;
bool need_pll_quirk;
} amd_chipset;
static DEFINE_SPINLOCK(amd_lock);
@ -201,11 +201,11 @@ void sb800_prefetch(struct device *dev, int on)
}
EXPORT_SYMBOL_GPL(sb800_prefetch);
int usb_amd_find_chipset_info(void)
static void usb_amd_find_chipset_info(void)
{
unsigned long flags;
struct amd_chipset_info info;
int need_pll_quirk = 0;
info.need_pll_quirk = 0;
spin_lock_irqsave(&amd_lock, flags);
@ -213,7 +213,7 @@ int usb_amd_find_chipset_info(void)
if (amd_chipset.probe_count > 0) {
amd_chipset.probe_count++;
spin_unlock_irqrestore(&amd_lock, flags);
return amd_chipset.probe_result;
return;
}
memset(&info, 0, sizeof(info));
spin_unlock_irqrestore(&amd_lock, flags);
@ -224,19 +224,19 @@ int usb_amd_find_chipset_info(void)
switch (info.sb_type.gen) {
case AMD_CHIPSET_SB700:
need_pll_quirk = info.sb_type.rev <= 0x3B;
info.need_pll_quirk = info.sb_type.rev <= 0x3B;
break;
case AMD_CHIPSET_SB800:
case AMD_CHIPSET_HUDSON2:
case AMD_CHIPSET_BOLTON:
need_pll_quirk = 1;
info.need_pll_quirk = 1;
break;
default:
need_pll_quirk = 0;
info.need_pll_quirk = 0;
break;
}
if (!need_pll_quirk) {
if (!info.need_pll_quirk) {
if (info.smbus_dev) {
pci_dev_put(info.smbus_dev);
info.smbus_dev = NULL;
@ -259,7 +259,6 @@ int usb_amd_find_chipset_info(void)
}
}
need_pll_quirk = info.probe_result = 1;
printk(KERN_DEBUG "QUIRK: Enable AMD PLL fix\n");
commit:
@ -270,7 +269,6 @@ commit:
/* Mark that we where here */
amd_chipset.probe_count++;
need_pll_quirk = amd_chipset.probe_result;
spin_unlock_irqrestore(&amd_lock, flags);
@ -283,10 +281,7 @@ commit:
amd_chipset = info;
spin_unlock_irqrestore(&amd_lock, flags);
}
return need_pll_quirk;
}
EXPORT_SYMBOL_GPL(usb_amd_find_chipset_info);
int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *pdev)
{
@ -322,6 +317,13 @@ bool usb_amd_prefetch_quirk(void)
}
EXPORT_SYMBOL_GPL(usb_amd_prefetch_quirk);
bool usb_amd_quirk_pll_check(void)
{
usb_amd_find_chipset_info();
return amd_chipset.need_pll_quirk;
}
EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_check);
/*
* The hardware normally enables the A-link power management feature, which
* lets the system lower the power consumption in idle states.
@ -527,7 +529,7 @@ void usb_amd_dev_put(void)
amd_chipset.nb_type = 0;
memset(&amd_chipset.sb_type, 0, sizeof(amd_chipset.sb_type));
amd_chipset.isoc_reqs = 0;
amd_chipset.probe_result = 0;
amd_chipset.need_pll_quirk = 0;
spin_unlock_irqrestore(&amd_lock, flags);

2
drivers/usb/host/pci-quirks.h
View File

@ -5,11 +5,11 @@
#ifdef CONFIG_USB_PCI
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);
int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *pdev);
bool usb_amd_hang_symptom_quirk(void);
bool usb_amd_prefetch_quirk(void);
void usb_amd_dev_put(void);
bool usb_amd_quirk_pll_check(void);
void usb_amd_quirk_pll_disable(void);
void usb_amd_quirk_pll_enable(void);
void usb_asmedia_modifyflowcontrol(struct pci_dev *pdev);

2
drivers/usb/host/xhci-pci.c
View File

@ -130,7 +130,7 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
xhci->quirks |= XHCI_AMD_0x96_HOST;
/* AMD PLL quirk */
if (pdev->vendor == PCI_VENDOR_ID_AMD && usb_amd_find_chipset_info())
if (pdev->vendor == PCI_VENDOR_ID_AMD && usb_amd_quirk_pll_check())
xhci->quirks |= XHCI_AMD_PLL_FIX;
if (pdev->vendor == PCI_VENDOR_ID_AMD &&