usb: pci-quirks: handle HAS_IOPORT dependency for AMD quirk

In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
not being declared. In the pci-quirks case the I/O port acceses are
used in the quirks for several AMD south bridges, Add a config option
for the AMD quirks to depend on HAS_IOPORT and #ifdef the quirk code.

Co-developed-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>

5 files changed, 52 insertions, 10 deletions

diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 7f33bcc315f27b..abf8c6cdea9ea5 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -91,6 +91,16 @@ config USB_PCI
 	  If you have such a device you may say N here and PCI related code
 	  will not be built in the USB driver.
 
+config USB_PCI_AMD
+	bool "AMD PCI USB host support"
+	depends on USB_PCI && HAS_IOPORT
+	default X86 || MACH_LOONGSON64 || PPC_PASEMI
+	help
+	  Enable workarounds for USB implementation quirks in SB600/SB700/SB800
+	  and later south bridge implementations. These are common on x86 PCs
+	  with AMD CPUs but rarely used elsewhere, with the exception of a few
+	  powerpc and mips desktop machines.
+
 if USB
 
 source "drivers/usb/core/Kconfig"
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 990280688b254d..ee3156f4953387 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -206,8 +206,7 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct hc_driver *driver)
 		goto free_irq_vectors;
 	}
 
-	hcd->amd_resume_bug = (usb_hcd_amd_remote_wakeup_quirk(dev) &&
-			driver->flags & (HCD_USB11 | HCD_USB3)) ? 1 : 0;
+	hcd->amd_resume_bug = usb_hcd_amd_resume_bug(dev, driver);
 
 	if (driver->flags & HCD_MEMORY) {
 		/* EHCI, OHCI */
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index 5e06fad82a2281..10813096d00c63 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -76,6 +76,7 @@
 #define USB_INTEL_USB3_PSSEN   0xD8
 #define USB_INTEL_USB3PRM      0xDC
 
+#ifdef CONFIG_USB_PCI_AMD
 /* AMD quirk use */
 #define	AB_REG_BAR_LOW		0xe0
 #define	AB_REG_BAR_HIGH		0xe1
@@ -587,6 +588,7 @@ bool usb_amd_pt_check_port(struct device *device, int port)
 	return !(value & BIT(port_shift));
 }
 EXPORT_SYMBOL_GPL(usb_amd_pt_check_port);
+#endif /* CONFIG_USB_PCI_AMD */
 
 static int usb_asmedia_wait_write(struct pci_dev *pdev)
 {
diff --git a/drivers/usb/host/pci-quirks.h b/drivers/usb/host/pci-quirks.h
index cde2263a9d2e4c..a5230b0b9e913a 100644
--- a/drivers/usb/host/pci-quirks.h
+++ b/drivers/usb/host/pci-quirks.h
@@ -2,7 +2,7 @@
 #ifndef __LINUX_USB_PCI_QUIRKS_H
 #define __LINUX_USB_PCI_QUIRKS_H
 
-#ifdef CONFIG_USB_PCI
+#ifdef CONFIG_USB_PCI_AMD
 int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *pdev);
 bool usb_amd_hang_symptom_quirk(void);
 bool usb_amd_prefetch_quirk(void);
@@ -12,23 +12,37 @@ void usb_amd_quirk_pll_disable(void);
 void usb_amd_quirk_pll_enable(void);
 void sb800_prefetch(struct device *dev, int on);
 bool usb_amd_pt_check_port(struct device *device, int port);
-
-void uhci_reset_hc(struct pci_dev *pdev, unsigned long base);
-int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base);
-void usb_asmedia_modifyflowcontrol(struct pci_dev *pdev);
-void usb_enable_intel_xhci_ports(struct pci_dev *xhci_pdev);
-void usb_disable_xhci_ports(struct pci_dev *xhci_pdev);
 #else
-struct pci_dev;
+static inline bool usb_amd_hang_symptom_quirk(void)
+{
+	return false;
+};
+static inline bool usb_amd_prefetch_quirk(void)
+{
+	return false;
+}
 static inline void usb_amd_quirk_pll_disable(void) {}
 static inline void usb_amd_quirk_pll_enable(void) {}
 static inline void usb_amd_dev_put(void) {}
+static inline bool usb_amd_quirk_pll_check(void)
+{
+	return false;
+}
 static inline void sb800_prefetch(struct device *dev, int on) {}
 static inline bool usb_amd_pt_check_port(struct device *device, int port)
 {
 	return false;
 }
+#endif /* CONFIG_USB_PCI_AMD */
 
+#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);
+void usb_asmedia_modifyflowcontrol(struct pci_dev *pdev);
+void usb_enable_intel_xhci_ports(struct pci_dev *xhci_pdev);
+void usb_disable_xhci_ports(struct pci_dev *xhci_pdev);
+#else
+struct pci_dev;
 static inline void usb_asmedia_modifyflowcontrol(struct pci_dev *pdev) {}
 static inline void usb_disable_xhci_ports(struct pci_dev *xhci_pdev) {}
 #endif  /* CONFIG_USB_PCI */
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index 61d4f0b793dcdc..00724b4f6e122b 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -484,8 +484,25 @@ extern int usb_hcd_pci_probe(struct pci_dev *dev,
 extern void usb_hcd_pci_remove(struct pci_dev *dev);
 extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
 
+#ifdef CONFIG_USB_PCI_AMD
 extern int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *dev);
 
+static inline bool usb_hcd_amd_resume_bug(struct pci_dev *dev,
+					  const struct hc_driver *driver)
+{
+	if (!usb_hcd_amd_remote_wakeup_quirk(dev))
+		return false;
+	if (driver->flags & (HCD_USB11 | HCD_USB3))
+		return true;
+	return false;
+}
+#else /* CONFIG_USB_PCI_AMD */
+static inline bool usb_hcd_amd_resume_bug(struct pci_dev *dev,
+					  const struct hc_driver *driver)
+{
+	return false;
+}
+#endif
 extern const struct dev_pm_ops usb_hcd_pci_pm_ops;
 #endif /* CONFIG_USB_PCI */