[PATCH 6.6 073/158] usb: pci-quirks: handle HAS_IOPORT dependency for AMD quirk

Greg Kroah-Hartman
2024-04-23T21:43:49Z

From: Niklas Schnelle <schnelle@linux.ibm.com>

[ Upstream commit 52e24f8c0a102ac76649c6b71224fadcc82bd5da ]

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>
Link: https://lore.kernel.org/r/20230911125653.1393895-3-schnelle@linux.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/usb/Kconfig | 10 ++++++++++
drivers/usb/core/hcd-pci.c | 3 +--
drivers/usb/host/pci-quirks.c | 2 ++
drivers/usb/host/pci-quirks.h | 30 ++++++++++++++++++++++--------
include/linux/usb/hcd.h | 17 +++++++++++++++++
5 files changed, 52 insertions(+), 10 deletions(-)

diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 7f33bcc315f27..abf8c6cdea9ea 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 990280688b254..ee3156f495338 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 5e06fad82a228..10813096d00c6 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 cde2263a9d2e4..a5230b0b9e913 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 61d4f0b793dcd..00724b4f6e122 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 */

--
2.43.0