* [PATCH 1/3] usb: pci-quirks: group AMD specific quirk code together
[not found] <20230911101149.4113303-1-schnelle@linux.ibm.com>
@ 2023-09-11 10:11 ` Niklas Schnelle
2023-09-11 10:11 ` [PATCH 2/3] usb: pci-quirks: handle HAS_IOPORT dependency for AMD quirk Niklas Schnelle
2023-09-11 10:11 ` [PATCH 3/3] usb: pci-quirks: handle HAS_IOPORT dependency for UHCI handoff Niklas Schnelle
2 siblings, 0 replies; 4+ messages in thread
From: Niklas Schnelle @ 2023-09-11 10:11 UTC (permalink / raw)
To: Arnd Bergmann, Mathias Nyman, Greg Kroah-Hartman
Cc: Heiko Carstens, Arnd Bergmann, linux-usb, linux-kernel
A follow on patch will introduce CONFIG_USB_PCI_AMD governing the AMD
quirk and adding its compile time dependency on HAS_IOPORT. In order to
minimize the number of #ifdefs in C files and make that patch easier
to read first group the code together. This is pure code movement
no functional change is intended.
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>
---
drivers/usb/host/pci-quirks.c | 119 +++++++++++++++++-----------------
drivers/usb/host/pci-quirks.h | 14 ++--
2 files changed, 68 insertions(+), 65 deletions(-)
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index 2665832f9add..5e06fad82a22 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -60,6 +60,22 @@
#define EHCI_USBLEGCTLSTS 4 /* legacy control/status */
#define EHCI_USBLEGCTLSTS_SOOE (1 << 13) /* SMI on ownership change */
+/* ASMEDIA quirk use */
+#define ASMT_DATA_WRITE0_REG 0xF8
+#define ASMT_DATA_WRITE1_REG 0xFC
+#define ASMT_CONTROL_REG 0xE0
+#define ASMT_CONTROL_WRITE_BIT 0x02
+#define ASMT_WRITEREG_CMD 0x10423
+#define ASMT_FLOWCTL_ADDR 0xFA30
+#define ASMT_FLOWCTL_DATA 0xBA
+#define ASMT_PSEUDO_DATA 0
+
+/* Intel quirk use */
+#define USB_INTEL_XUSB2PR 0xD0
+#define USB_INTEL_USB2PRM 0xD4
+#define USB_INTEL_USB3_PSSEN 0xD8
+#define USB_INTEL_USB3PRM 0xDC
+
/* AMD quirk use */
#define AB_REG_BAR_LOW 0xe0
#define AB_REG_BAR_HIGH 0xe1
@@ -93,21 +109,6 @@
#define NB_PIF0_PWRDOWN_0 0x01100012
#define NB_PIF0_PWRDOWN_1 0x01100013
-#define USB_INTEL_XUSB2PR 0xD0
-#define USB_INTEL_USB2PRM 0xD4
-#define USB_INTEL_USB3_PSSEN 0xD8
-#define USB_INTEL_USB3PRM 0xDC
-
-/* ASMEDIA quirk use */
-#define ASMT_DATA_WRITE0_REG 0xF8
-#define ASMT_DATA_WRITE1_REG 0xFC
-#define ASMT_CONTROL_REG 0xE0
-#define ASMT_CONTROL_WRITE_BIT 0x02
-#define ASMT_WRITEREG_CMD 0x10423
-#define ASMT_FLOWCTL_ADDR 0xFA30
-#define ASMT_FLOWCTL_DATA 0xBA
-#define ASMT_PSEUDO_DATA 0
-
/*
* amd_chipset_gen values represent AMD different chipset generations
*/
@@ -458,50 +459,6 @@ void usb_amd_quirk_pll_disable(void)
}
EXPORT_SYMBOL_GPL(usb_amd_quirk_pll_disable);
-static int usb_asmedia_wait_write(struct pci_dev *pdev)
-{
- unsigned long retry_count;
- unsigned char value;
-
- for (retry_count = 1000; retry_count > 0; --retry_count) {
-
- pci_read_config_byte(pdev, ASMT_CONTROL_REG, &value);
-
- if (value == 0xff) {
- dev_err(&pdev->dev, "%s: check_ready ERROR", __func__);
- return -EIO;
- }
-
- if ((value & ASMT_CONTROL_WRITE_BIT) == 0)
- return 0;
-
- udelay(50);
- }
-
- dev_warn(&pdev->dev, "%s: check_write_ready timeout", __func__);
- return -ETIMEDOUT;
-}
-
-void usb_asmedia_modifyflowcontrol(struct pci_dev *pdev)
-{
- if (usb_asmedia_wait_write(pdev) != 0)
- return;
-
- /* send command and address to device */
- pci_write_config_dword(pdev, ASMT_DATA_WRITE0_REG, ASMT_WRITEREG_CMD);
- pci_write_config_dword(pdev, ASMT_DATA_WRITE1_REG, ASMT_FLOWCTL_ADDR);
- pci_write_config_byte(pdev, ASMT_CONTROL_REG, ASMT_CONTROL_WRITE_BIT);
-
- if (usb_asmedia_wait_write(pdev) != 0)
- return;
-
- /* send data to device */
- pci_write_config_dword(pdev, ASMT_DATA_WRITE0_REG, ASMT_FLOWCTL_DATA);
- pci_write_config_dword(pdev, ASMT_DATA_WRITE1_REG, ASMT_PSEUDO_DATA);
- pci_write_config_byte(pdev, ASMT_CONTROL_REG, ASMT_CONTROL_WRITE_BIT);
-}
-EXPORT_SYMBOL_GPL(usb_asmedia_modifyflowcontrol);
-
void usb_amd_quirk_pll_enable(void)
{
usb_amd_quirk_pll(0);
@@ -631,6 +588,50 @@ bool usb_amd_pt_check_port(struct device *device, int port)
}
EXPORT_SYMBOL_GPL(usb_amd_pt_check_port);
+static int usb_asmedia_wait_write(struct pci_dev *pdev)
+{
+ unsigned long retry_count;
+ unsigned char value;
+
+ for (retry_count = 1000; retry_count > 0; --retry_count) {
+
+ pci_read_config_byte(pdev, ASMT_CONTROL_REG, &value);
+
+ if (value == 0xff) {
+ dev_err(&pdev->dev, "%s: check_ready ERROR", __func__);
+ return -EIO;
+ }
+
+ if ((value & ASMT_CONTROL_WRITE_BIT) == 0)
+ return 0;
+
+ udelay(50);
+ }
+
+ dev_warn(&pdev->dev, "%s: check_write_ready timeout", __func__);
+ return -ETIMEDOUT;
+}
+
+void usb_asmedia_modifyflowcontrol(struct pci_dev *pdev)
+{
+ if (usb_asmedia_wait_write(pdev) != 0)
+ return;
+
+ /* send command and address to device */
+ pci_write_config_dword(pdev, ASMT_DATA_WRITE0_REG, ASMT_WRITEREG_CMD);
+ pci_write_config_dword(pdev, ASMT_DATA_WRITE1_REG, ASMT_FLOWCTL_ADDR);
+ pci_write_config_byte(pdev, ASMT_CONTROL_REG, ASMT_CONTROL_WRITE_BIT);
+
+ if (usb_asmedia_wait_write(pdev) != 0)
+ return;
+
+ /* send data to device */
+ pci_write_config_dword(pdev, ASMT_DATA_WRITE0_REG, ASMT_FLOWCTL_DATA);
+ pci_write_config_dword(pdev, ASMT_DATA_WRITE1_REG, ASMT_PSEUDO_DATA);
+ pci_write_config_byte(pdev, ASMT_CONTROL_REG, ASMT_CONTROL_WRITE_BIT);
+}
+EXPORT_SYMBOL_GPL(usb_asmedia_modifyflowcontrol);
+
/*
* Make sure the controller is completely inactive, unable to
* generate interrupts or do DMA.
diff --git a/drivers/usb/host/pci-quirks.h b/drivers/usb/host/pci-quirks.h
index e729de21fad7..cde2263a9d2e 100644
--- a/drivers/usb/host/pci-quirks.h
+++ b/drivers/usb/host/pci-quirks.h
@@ -3,8 +3,6 @@
#define __LINUX_USB_PCI_QUIRKS_H
#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_hcd_amd_remote_wakeup_quirk(struct pci_dev *pdev);
bool usb_amd_hang_symptom_quirk(void);
bool usb_amd_prefetch_quirk(void);
@@ -12,23 +10,27 @@ 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 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);
-void sb800_prefetch(struct device *dev, int on);
-bool usb_amd_pt_check_port(struct device *device, int port);
#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_asmedia_modifyflowcontrol(struct pci_dev *pdev) {}
static inline void usb_amd_dev_put(void) {}
-static inline void usb_disable_xhci_ports(struct pci_dev *xhci_pdev) {}
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 */
#endif /* __LINUX_USB_PCI_QUIRKS_H */
--
2.39.2
^ permalink raw reply [flat|nested] 4+ messages in thread* [PATCH 2/3] usb: pci-quirks: handle HAS_IOPORT dependency for AMD quirk
[not found] <20230911101149.4113303-1-schnelle@linux.ibm.com>
2023-09-11 10:11 ` [PATCH 1/3] usb: pci-quirks: group AMD specific quirk code together Niklas Schnelle
@ 2023-09-11 10:11 ` Niklas Schnelle
2023-09-11 10:11 ` [PATCH 3/3] usb: pci-quirks: handle HAS_IOPORT dependency for UHCI handoff Niklas Schnelle
2 siblings, 0 replies; 4+ messages in thread
From: Niklas Schnelle @ 2023-09-11 10:11 UTC (permalink / raw)
To: Arnd Bergmann, Greg Kroah-Hartman, Mathias Nyman
Cc: Heiko Carstens, Arnd Bergmann, linux-usb, linux-kernel
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>
---
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
^ permalink raw reply [flat|nested] 4+ messages in thread* [PATCH 3/3] usb: pci-quirks: handle HAS_IOPORT dependency for UHCI handoff
[not found] <20230911101149.4113303-1-schnelle@linux.ibm.com>
2023-09-11 10:11 ` [PATCH 1/3] usb: pci-quirks: group AMD specific quirk code together Niklas Schnelle
2023-09-11 10:11 ` [PATCH 2/3] usb: pci-quirks: handle HAS_IOPORT dependency for AMD quirk Niklas Schnelle
@ 2023-09-11 10:11 ` Niklas Schnelle
2 siblings, 0 replies; 4+ messages in thread
From: Niklas Schnelle @ 2023-09-11 10:11 UTC (permalink / raw)
To: Arnd Bergmann, Mathias Nyman, Greg Kroah-Hartman
Cc: Heiko Carstens, Arnd Bergmann, linux-usb, linux-kernel
In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
not being declared. With the AMD quirk handled USB PCI quirks still use
inw() in uhci_check_and_reset_hc() and thus indirectly in
quirk_usb_handoff_uhci(). Handle this by conditionally compiling
uhci_check_and_reset_hc() and stubbing out quirk_usb_handoff_uhci() when
HAS_IOPORT is not available.
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>
---
drivers/usb/host/pci-quirks.c | 23 ++++++++++++++++-------
1 file changed, 16 insertions(+), 7 deletions(-)
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index 10813096d00c..1f9c1b1435d8 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -634,6 +634,16 @@ void usb_asmedia_modifyflowcontrol(struct pci_dev *pdev)
}
EXPORT_SYMBOL_GPL(usb_asmedia_modifyflowcontrol);
+static inline int io_type_enabled(struct pci_dev *pdev, unsigned int mask)
+{
+ u16 cmd;
+
+ return !pci_read_config_word(pdev, PCI_COMMAND, &cmd) && (cmd & mask);
+}
+
+#define mmio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_MEMORY)
+
+#if defined(CONFIG_HAS_IOPORT) && IS_ENABLED(CONFIG_USB_UHCI_HCD)
/*
* Make sure the controller is completely inactive, unable to
* generate interrupts or do DMA.
@@ -715,14 +725,7 @@ int uhci_check_and_reset_hc(struct pci_dev *pdev, unsigned long base)
}
EXPORT_SYMBOL_GPL(uhci_check_and_reset_hc);
-static inline int io_type_enabled(struct pci_dev *pdev, unsigned int mask)
-{
- u16 cmd;
- return !pci_read_config_word(pdev, PCI_COMMAND, &cmd) && (cmd & mask);
-}
-
#define pio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_IO)
-#define mmio_enabled(dev) io_type_enabled(dev, PCI_COMMAND_MEMORY)
static void quirk_usb_handoff_uhci(struct pci_dev *pdev)
{
@@ -742,6 +745,12 @@ static void quirk_usb_handoff_uhci(struct pci_dev *pdev)
uhci_check_and_reset_hc(pdev, base);
}
+#else /* defined(CONFIG_HAS_IOPORT && IS_ENABLED(CONFIG_USB_UHCI_HCD) */
+
+static void quirk_usb_handoff_uhci(struct pci_dev *pdev) {}
+
+#endif /* defined(CONFIG_HAS_IOPORT && IS_ENABLED(CONFIG_USB_UHCI_HCD) */
+
static int mmio_resource_enabled(struct pci_dev *pdev, int idx)
{
return pci_resource_start(pdev, idx) && mmio_enabled(pdev);
--
2.39.2
^ permalink raw reply [flat|nested] 4+ messages in thread