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Message-Id: <20230911125653.1393895-3-schnelle@linux.ibm.com>
Date: Mon, 11 Sep 2023 14:56:52 +0200
From: Niklas Schnelle <schnelle@...ux.ibm.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Mathias Nyman <mathias.nyman@...el.com>
Cc: Alan Stern <stern@...land.harvard.edu>,
Niklas Schnelle <schnelle@...ux.ibm.com>,
Basavaraj Natikar <Basavaraj.Natikar@....com>,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
Arnd Bergmann <arnd@...db.de>,
Heiko Carstens <hca@...ux.ibm.com>
Subject: [PATCH 2/3] 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@...nel.org>
Signed-off-by: Arnd Bergmann <arnd@...nel.org>
Signed-off-by: Niklas Schnelle <schnelle@...ux.ibm.com>
---
drivers/usb/Kconfig | 10 ++++++++++
drivers/usb/core/hcd-pci.c | 3 +--
drivers/usb/host/pci-quirks.c | 2 ++
drivers/usb/host/pci-quirks.h | 34 ++++++++++++++++++++++++----------
include/linux/usb/hcd.h | 17 +++++++++++++++++
5 files changed, 54 insertions(+), 12 deletions(-)
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 7f33bcc315f2..abf8c6cdea9e 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 990280688b25..ee3156f49533 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 5e06fad82a22..10813096d00c 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 cde2263a9d2e..a5230b0b9e91 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);
@@ -12,7 +12,30 @@ 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);
+#else
+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);
@@ -20,15 +43,6 @@ 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_amd_quirk_pll_disable(void) {}
-static inline void usb_amd_quirk_pll_enable(void) {}
-static inline void usb_amd_dev_put(void) {}
-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;
-}
-
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 61d4f0b793dc..00724b4f6e12 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 */
--
2.39.2
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