V4 - Rename hcd phy flag "suspend_without_phy_exit" to
"phy_supplies_usb_clock" to more closely reflect
the actaual hardware. Add the device tree property
"suspend-without-phy-exit" to set the flag. Remove the code
that sets the flag in the OHCI, EHCI and XHCI drivers which
means that the ohci_platform.c driver can be used without
any modifications.
V3 - Based on feedback
- Patch 3/6
In xhci-brcm.h, fixed incorrect function name when
CONFIG_USB_XHCI_BRCM is not defined. Found by kbuild test robot.
- Patch 4/6
In ohci-platform.c, use devm_kmemdup() instead of demv_kzalloc().
- Patch 5/6
In ehci-platform.c, use dma_coerce_mask_and_coherent()
instead of dma_coerce_mask_and_coherent(). Remove unneeded
#ifdef CONFIG_OF.
V2 - Based on feedback, the functionality for XHCI and OHCI was
moved from Broadcom platform drivers into the standard XHCI
and OHCI platform drivers. The EHCI functionality still uses
a Broadcom EHCI driver because of the workarounds needed for
bugs in the EHCI controller.
This adds support for the XHCI, EHCI and OHCI host controllers found
in Broadcom STB SoC's. These drivers depend on getting access to the
new Broadcom STB USB PHY driver through a device-tree phandle and
will fail if the driver is not available.
Al Cooper (5):
dt-bindings: Add Broadcom STB USB support
usb: core: Add ability to skip phy exit on suspend and init on resume
usb: xhci: xhci-plat: Add support for Broadcom STB SoC's
usb: ehci: Add new EHCI driver for Broadcom STB SoC's
usb: host: Add ability to build new Broadcom STB USB drivers
.../devicetree/bindings/usb/brcm,bcm7445-ehci.txt | 24 ++
Documentation/devicetree/bindings/usb/usb-hcd.txt | 3 +
Documentation/devicetree/bindings/usb/usb-xhci.txt | 1 +
MAINTAINERS | 9 +
arch/arm/configs/multi_v7_defconfig | 1 +
arch/arm64/configs/defconfig | 1 +
drivers/usb/core/hcd.c | 8 +-
drivers/usb/core/phy.c | 28 +-
drivers/usb/core/phy.h | 9 +-
drivers/usb/host/Kconfig | 26 ++
drivers/usb/host/Makefile | 18 +-
drivers/usb/host/ehci-brcm.c | 286 +++++++++++++++++++++
drivers/usb/host/xhci-brcm.c | 16 ++
drivers/usb/host/xhci-brcm.h | 16 ++
drivers/usb/host/xhci-plat.c | 8 +
include/linux/usb/hcd.h | 6 +
16 files changed, 439 insertions(+), 21 deletions(-)
create mode 100644 Documentation/devicetree/bindings/usb/brcm,bcm7445-ehci.txt
create mode 100644 drivers/usb/host/ehci-brcm.c
create mode 100644 drivers/usb/host/xhci-brcm.c
create mode 100644 drivers/usb/host/xhci-brcm.h
--
1.9.0.138.g2de3478
Add a new EHCI driver for Broadcom STB SoC's. A new EHCI driver
was created instead of adding support to the existing ehci platform
driver because of the code required to workaround bugs in the EHCI
controller.
Signed-off-by: Al Cooper <[email protected]>
---
drivers/usb/host/ehci-brcm.c | 286 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 286 insertions(+)
create mode 100644 drivers/usb/host/ehci-brcm.c
diff --git a/drivers/usb/host/ehci-brcm.c b/drivers/usb/host/ehci-brcm.c
new file mode 100644
index 000000000000..eb0ea030a4c8
--- /dev/null
+++ b/drivers/usb/host/ehci-brcm.c
@@ -0,0 +1,286 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2018, Broadcom */
+
+#include <linux/acpi.h>
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+
+#include "ehci.h"
+
+#define BRCM_DRIVER_DESC "EHCI Broadcom STB driver"
+
+#define hcd_to_ehci_priv(h) ((struct brcm_priv *)hcd_to_ehci(h)->priv)
+
+struct brcm_priv {
+ struct clk *clk;
+};
+
+static const char brcm_hcd_name[] = "ehci-brcm";
+
+static int (*org_hub_control)(struct usb_hcd *hcd,
+ u16 typeReq, u16 wValue, u16 wIndex,
+ char *buf, u16 wLength);
+
+/* ehci_brcm_wait_for_sof
+ * Wait for start of next microframe, then wait extra delay microseconds
+ */
+static inline void ehci_brcm_wait_for_sof(struct ehci_hcd *ehci, u32 delay)
+{
+ int frame_idx = ehci_readl(ehci, &ehci->regs->frame_index);
+
+ while (frame_idx == ehci_readl(ehci, &ehci->regs->frame_index))
+ ;
+ udelay(delay);
+}
+
+/*
+ * ehci_brcm_hub_control
+ * Intercept echi-hcd request to complete RESUME and align it to the start
+ * of the next microframe.
+ * If RESUME is complete too late in the microframe, host controller
+ * detects babble on suspended port and resets the port afterwards.
+ * This s/w workaround allows to avoid this problem.
+ * See SWLINUX-1909 for more details
+ */
+static int ehci_brcm_hub_control(
+ struct usb_hcd *hcd,
+ u16 typeReq,
+ u16 wValue,
+ u16 wIndex,
+ char *buf,
+ u16 wLength)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ int ports = HCS_N_PORTS(ehci->hcs_params);
+ u32 __iomem *status_reg = &ehci->regs->port_status[
+ (wIndex & 0xff) - 1];
+ unsigned long flags;
+ int retval, irq_disabled = 0;
+
+ /*
+ * RESUME is cleared when GetPortStatus() is called 20ms after start
+ * of RESUME
+ */
+ if ((typeReq == GetPortStatus) &&
+ (wIndex && wIndex <= ports) &&
+ ehci->reset_done[wIndex-1] &&
+ time_after_eq(jiffies, ehci->reset_done[wIndex-1]) &&
+ (ehci_readl(ehci, status_reg) & PORT_RESUME)) {
+
+ /*
+ * to make sure we are not interrupted until RESUME bit
+ * is cleared, disable interrupts on current CPU
+ */
+ ehci_dbg(ehci, "SOF alignment workaround\n");
+ irq_disabled = 1;
+ local_irq_save(flags);
+ ehci_brcm_wait_for_sof(ehci, 5);
+ }
+ retval = (*org_hub_control)(hcd, typeReq, wValue, wIndex, buf, wLength);
+ if (irq_disabled)
+ local_irq_restore(flags);
+ return retval;
+}
+
+static int ehci_brcm_reset(struct usb_hcd *hcd)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+
+ ehci->big_endian_mmio = 1;
+
+ ehci->caps = (struct ehci_caps *) hcd->regs;
+ ehci->regs = (struct ehci_regs *) (hcd->regs +
+ HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)));
+
+ /* This fixes the lockup during reboot due to prior interrupts */
+ ehci_writel(ehci, CMD_RESET, &ehci->regs->command);
+ mdelay(10);
+
+ /*
+ * SWLINUX-1705: Avoid OUT packet underflows during high memory
+ * bus usage
+ * port_status[0x0f] = Broadcom-proprietary USB_EHCI_INSNREG00 @ 0x90
+ */
+ ehci_writel(ehci, 0x00800040, &ehci->regs->port_status[0x10]);
+ ehci_writel(ehci, 0x00000001, &ehci->regs->port_status[0x12]);
+
+ return ehci_setup(hcd);
+}
+
+static struct hc_driver __read_mostly ehci_brcm_hc_driver;
+
+static const struct ehci_driver_overrides brcm_overrides __initconst = {
+
+ .reset = ehci_brcm_reset,
+ .extra_priv_size = sizeof(struct brcm_priv),
+};
+
+static int ehci_brcm_probe(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd;
+ struct resource *res_mem;
+ struct brcm_priv *priv;
+ int irq;
+ int err;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+ if (err)
+ return err;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "no irq provided");
+ return irq;
+ }
+
+ /* Hook the hub control routine to work around a bug */
+ if (org_hub_control == NULL)
+ org_hub_control = ehci_brcm_hc_driver.hub_control;
+ ehci_brcm_hc_driver.hub_control = ehci_brcm_hub_control;
+
+ /* initialize hcd */
+ hcd = usb_create_hcd(&ehci_brcm_hc_driver,
+ &pdev->dev, dev_name(&pdev->dev));
+ if (!hcd)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, hcd);
+ priv = hcd_to_ehci_priv(hcd);
+
+ priv->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(priv->clk)) {
+ dev_err(&pdev->dev, "Clock not found in Device Tree\n");
+ priv->clk = NULL;
+ }
+ err = clk_prepare_enable(priv->clk);
+ if (err)
+ goto err_hcd;
+
+ res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hcd->regs = devm_ioremap_resource(&pdev->dev, res_mem);
+ if (IS_ERR(hcd->regs)) {
+ err = PTR_ERR(hcd->regs);
+ goto err_clk;
+ }
+ hcd->rsrc_start = res_mem->start;
+ hcd->rsrc_len = resource_size(res_mem);
+ err = usb_add_hcd(hcd, irq, IRQF_SHARED);
+ if (err)
+ goto err_clk;
+
+ device_wakeup_enable(hcd->self.controller);
+ device_enable_async_suspend(hcd->self.controller);
+ platform_set_drvdata(pdev, hcd);
+
+ return err;
+
+err_clk:
+ clk_disable_unprepare(priv->clk);
+err_hcd:
+ usb_put_hcd(hcd);
+
+ return err;
+}
+
+static int ehci_brcm_remove(struct platform_device *dev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
+ struct brcm_priv *priv = hcd_to_ehci_priv(hcd);
+
+ usb_remove_hcd(hcd);
+ clk_disable_unprepare(priv->clk);
+ usb_put_hcd(hcd);
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+
+static int ehci_brcm_suspend(struct device *dev)
+{
+ int ret;
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct brcm_priv *priv = hcd_to_ehci_priv(hcd);
+ bool do_wakeup = device_may_wakeup(dev);
+
+ ret = ehci_suspend(hcd, do_wakeup);
+ clk_disable_unprepare(priv->clk);
+ return ret;
+}
+
+static int ehci_brcm_resume(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ struct brcm_priv *priv = hcd_to_ehci_priv(hcd);
+ int err;
+
+ err = clk_prepare_enable(priv->clk);
+ if (err)
+ return err;
+ /*
+ * SWLINUX-1705: Avoid OUT packet underflows during high memory
+ * bus usage
+ * port_status[0x0f] = Broadcom-proprietary USB_EHCI_INSNREG00
+ * @ 0x90
+ */
+ ehci_writel(ehci, 0x00800040, &ehci->regs->port_status[0x10]);
+ ehci_writel(ehci, 0x00000001, &ehci->regs->port_status[0x12]);
+
+ ehci_resume(hcd, false);
+ return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static SIMPLE_DEV_PM_OPS(ehci_brcm_pm_ops, ehci_brcm_suspend,
+ ehci_brcm_resume);
+
+static const struct of_device_id brcm_ehci_of_match[] = {
+ { .compatible = "brcm,bcm7445-ehci", },
+ {}
+};
+
+static struct platform_driver ehci_brcm_driver = {
+ .probe = ehci_brcm_probe,
+ .remove = ehci_brcm_remove,
+ .shutdown = usb_hcd_platform_shutdown,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "ehci-brcm",
+ .pm = &ehci_brcm_pm_ops,
+ .of_match_table = brcm_ehci_of_match,
+ }
+};
+
+static int __init ehci_brcm_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ pr_info("%s: " BRCM_DRIVER_DESC "\n", brcm_hcd_name);
+
+ ehci_init_driver(&ehci_brcm_hc_driver, &brcm_overrides);
+ return platform_driver_register(&ehci_brcm_driver);
+}
+module_init(ehci_brcm_init);
+
+static void __exit ehci_brcm_exit(void)
+{
+ platform_driver_unregister(&ehci_brcm_driver);
+}
+module_exit(ehci_brcm_exit);
+
+MODULE_ALIAS("platform:ehci-brcm");
+MODULE_DESCRIPTION(BRCM_DRIVER_DESC);
+MODULE_AUTHOR("Al Cooper");
+MODULE_LICENSE("GPL");
--
1.9.0.138.g2de3478
Add DT bindings for Broadcom STB USB EHCI and XHCI drivers.
Add "phy-supplies-usb-clock" property description to usb-hcd.txt
NOTE: The OHCI driver is not included because it uses the generic
platform driver.
Signed-off-by: Al Cooper <[email protected]>
---
.../devicetree/bindings/usb/brcm,bcm7445-ehci.txt | 24 ++++++++++++++++++++++
Documentation/devicetree/bindings/usb/usb-hcd.txt | 3 +++
Documentation/devicetree/bindings/usb/usb-xhci.txt | 1 +
3 files changed, 28 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/brcm,bcm7445-ehci.txt
diff --git a/Documentation/devicetree/bindings/usb/brcm,bcm7445-ehci.txt b/Documentation/devicetree/bindings/usb/brcm,bcm7445-ehci.txt
new file mode 100644
index 000000000000..4dea956f2705
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/brcm,bcm7445-ehci.txt
@@ -0,0 +1,24 @@
+Broadcom STB USB EHCI controller
+
+Required properties:
+- compatible: should be "brcm,bcm7445-ehci"
+- reg: should contain one register range i.e. start and length
+- interrupts: description of the interrupt line
+- phys: phandle + phy specifier pair
+ The specifier should be 0 for the OHCI/EHCI PHY
+- phy-supplies-usb-clock: See usb-hcd.txt for details.
+
+Optional properties:
+- clocks: A phandle for the EHCI clock
+
+Example:
+
+ehci@f0b00300 {
+ compatible = "brcm,bcm7445-ehci";
+ reg = <0xf0b00300 0xa8>;
+ interrupts = <0x0 0x5a 0x0>;
+ interrupt-names = "usb0_ehci_0";
+ phys = <&usbphy_0 0x0>;
+ clocks = <&usb20>;
+ phy-supplies-usb-clock;
+};
diff --git a/Documentation/devicetree/bindings/usb/usb-hcd.txt b/Documentation/devicetree/bindings/usb/usb-hcd.txt
index 50529b838c9c..6b4755924b15 100644
--- a/Documentation/devicetree/bindings/usb/usb-hcd.txt
+++ b/Documentation/devicetree/bindings/usb/usb-hcd.txt
@@ -2,6 +2,9 @@ Generic USB HCD (Host Controller Device) Properties
Optional properties:
- phys: a list of all USB PHYs on this HCD
+- phy-supplies-usb-clock: boolean, used for SoCs where the PHY supplies
+ the usb controller clock. This will prevent the PHY exit from being
+ called on suspend.
Example:
&usb1 {
diff --git a/Documentation/devicetree/bindings/usb/usb-xhci.txt b/Documentation/devicetree/bindings/usb/usb-xhci.txt
index fea8b1545751..f58e617ee54c 100644
--- a/Documentation/devicetree/bindings/usb/usb-xhci.txt
+++ b/Documentation/devicetree/bindings/usb/usb-xhci.txt
@@ -21,6 +21,7 @@ Required properties:
device
- "renesas,rcar-gen3-xhci" for a generic R-Car Gen3 or RZ/G2 compatible
device
+ - "brcm,bcm7445-xhci" for Broadcom STB SoCs
- "xhci-platform" (deprecated)
When compatible with the generic version, nodes must list the
--
1.9.0.138.g2de3478
Add the build system changes needed to get the Broadcom STB XHCI,
EHCI and OHCI functionality working. The link order for XHCI was
changed in the Makefile because of the way STB XHCI, EHCI and OHCI
controllers share a port which requires that the XHCI driver be
initialized first. Also update MAINTAINERS.
Signed-off-by: Al Cooper <[email protected]>
---
MAINTAINERS | 9 +++++++++
arch/arm/configs/multi_v7_defconfig | 1 +
arch/arm64/configs/defconfig | 1 +
drivers/usb/host/Kconfig | 26 ++++++++++++++++++++++++++
drivers/usb/host/Makefile | 18 ++++++++++++------
5 files changed, 49 insertions(+), 6 deletions(-)
diff --git a/MAINTAINERS b/MAINTAINERS
index 2f3eba4484aa..932fcc6f8ff5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2998,6 +2998,15 @@ S: Supported
F: drivers/i2c/busses/i2c-brcmstb.c
F: Documentation/devicetree/bindings/i2c/i2c-brcmstb.txt
+BROADCOM BRCMSTB USB XHCI, EHCI and OHCI DRIVERS
+M: Al Cooper <[email protected]>
+L: [email protected]
+L: [email protected]
+S: Maintained
+F: drivers/usb/host/ehci-brcm.*
+F: drivers/usb/host/xhci-brcm.*
+F: Documentation/devicetree/bindings/usb/brcm,bcm7445-*.txt
+
BROADCOM BRCMSTB USB2 and USB3 PHY DRIVER
M: Al Cooper <[email protected]>
L: [email protected]
diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 63af6234c1b6..64ca0edb43ed 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -726,6 +726,7 @@ CONFIG_USB_CHIPIDEA_UDC=y
CONFIG_USB_CHIPIDEA_HOST=y
CONFIG_USB_ISP1760=y
CONFIG_USB_HSIC_USB3503=y
+CONFIG_USB_BRCM=y
CONFIG_AB8500_USB=y
CONFIG_KEYSTONE_USB_PHY=m
CONFIG_NOP_USB_XCEIV=m
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index c9a57d11330b..89637256e7bf 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -520,6 +520,7 @@ CONFIG_USB_GADGET=y
CONFIG_USB_RENESAS_USBHS_UDC=m
CONFIG_USB_RENESAS_USB3=m
CONFIG_USB_ULPI_BUS=y
+CONFIG_USB_BRCM=y
CONFIG_MMC=y
CONFIG_MMC_BLOCK_MINORS=32
CONFIG_MMC_ARMMMCI=y
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 16758b12a5e9..2d0b3060ad05 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -96,6 +96,32 @@ config USB_XHCI_TEGRA
endif # USB_XHCI_HCD
+config USB_OHCI_BRCM
+ tristate
+
+config USB_EHCI_BRCM
+ tristate
+
+config USB_XHCI_BRCM
+ tristate
+
+config BRCM_USB_PHY
+ tristate
+
+config USB_BRCM
+ tristate "Broadcom STB USB support"
+ depends on ARCH_BRCMSTB || COMPILE_TEST
+ select USB_OHCI_HCD_PLATFORM if USB_OHCI_HCD
+ select USB_EHCI_BRCM if USB_EHCI_HCD
+ select USB_XHCI_BRCM if USB_XHCI_HCD
+ select USB_XHCI_PLATFORM if USB_XHCI_HCD
+ help
+ Say Y to enable support for XHCI, EHCI and OHCI host controllers
+ found in Broadcom STB SoC's.
+
+ Disabling this will keep the controllers and corresponding
+ PHYs powered down.
+
config USB_EHCI_HCD
tristate "EHCI HCD (USB 2.0) support"
depends on HAS_DMA && HAS_IOMEM
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 84514f71ae44..9bdd64b710ee 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -31,6 +31,10 @@ ifneq ($(CONFIG_USB_XHCI_RCAR), )
xhci-plat-hcd-y += xhci-rcar.o
endif
+ifneq ($(CONFIG_USB_XHCI_BRCM), )
+ xhci-plat-hcd-y += xhci-brcm.o
+endif
+
ifneq ($(CONFIG_DEBUG_FS),)
xhci-hcd-y += xhci-debugfs.o
endif
@@ -39,6 +43,13 @@ obj-$(CONFIG_USB_WHCI_HCD) += whci/
obj-$(CONFIG_USB_PCI) += pci-quirks.o
+obj-$(CONFIG_USB_XHCI_HCD) += xhci-hcd.o
+obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o
+obj-$(CONFIG_USB_XHCI_PLATFORM) += xhci-plat-hcd.o
+obj-$(CONFIG_USB_XHCI_HISTB) += xhci-histb.o
+obj-$(CONFIG_USB_XHCI_MTK) += xhci-mtk.o
+obj-$(CONFIG_USB_XHCI_TEGRA) += xhci-tegra.o
+
obj-$(CONFIG_USB_EHCI_HCD) += ehci-hcd.o
obj-$(CONFIG_USB_EHCI_PCI) += ehci-pci.o
obj-$(CONFIG_USB_EHCI_HCD_PLATFORM) += ehci-platform.o
@@ -52,6 +63,7 @@ obj-$(CONFIG_USB_EHCI_EXYNOS) += ehci-exynos.o
obj-$(CONFIG_USB_EHCI_HCD_AT91) += ehci-atmel.o
obj-$(CONFIG_USB_EHCI_TEGRA) += ehci-tegra.o
obj-$(CONFIG_USB_W90X900_EHCI) += ehci-w90x900.o
+obj-$(CONFIG_USB_EHCI_BRCM) += ehci-brcm.o
obj-$(CONFIG_USB_OXU210HP_HCD) += oxu210hp-hcd.o
obj-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o
@@ -72,12 +84,6 @@ obj-$(CONFIG_USB_OHCI_HCD_DAVINCI) += ohci-da8xx.o
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o
obj-$(CONFIG_USB_FHCI_HCD) += fhci.o
-obj-$(CONFIG_USB_XHCI_HCD) += xhci-hcd.o
-obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o
-obj-$(CONFIG_USB_XHCI_PLATFORM) += xhci-plat-hcd.o
-obj-$(CONFIG_USB_XHCI_HISTB) += xhci-histb.o
-obj-$(CONFIG_USB_XHCI_MTK) += xhci-mtk.o
-obj-$(CONFIG_USB_XHCI_TEGRA) += xhci-tegra.o
obj-$(CONFIG_USB_SL811_HCD) += sl811-hcd.o
obj-$(CONFIG_USB_SL811_CS) += sl811_cs.o
obj-$(CONFIG_USB_U132_HCD) += u132-hcd.o
--
1.9.0.138.g2de3478
Add the ability to skip calling the PHY's exit routine on suspend
and the PHY's init routine on resume. This is to handle a USB PHY
that should have it's power_off function called on suspend but cannot
have it's exit function called because on exit it will disable the
PHY to the point where all USB clocks are stopped and register
accesses to the Host Controllers using the PHY will be disabled
and the host drivers will crash.
This is enabled with the HCD flag "phy_supplies_usb_clock" which
can be set from any HCD driver or with the device tree property
"phy-supplies-usb-clock".
Signed-off-by: Al Cooper <[email protected]>
---
drivers/usb/core/hcd.c | 8 ++++----
drivers/usb/core/phy.c | 28 ++++++++++++++++++++--------
drivers/usb/core/phy.h | 9 ++++++---
include/linux/usb/hcd.h | 6 ++++++
4 files changed, 36 insertions(+), 15 deletions(-)
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 487025d31d44..5ebc82a69403 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -2249,7 +2249,7 @@ int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg)
hcd->state = HC_STATE_SUSPENDED;
if (!PMSG_IS_AUTO(msg))
- usb_phy_roothub_suspend(hcd->self.sysdev,
+ usb_phy_roothub_suspend(hcd,
hcd->phy_roothub);
/* Did we race with a root-hub wakeup event? */
@@ -2290,7 +2290,7 @@ int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg)
}
if (!PMSG_IS_AUTO(msg)) {
- status = usb_phy_roothub_resume(hcd->self.sysdev,
+ status = usb_phy_roothub_resume(hcd,
hcd->phy_roothub);
if (status)
return status;
@@ -2333,7 +2333,7 @@ int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg)
}
} else {
hcd->state = old_state;
- usb_phy_roothub_suspend(hcd->self.sysdev, hcd->phy_roothub);
+ usb_phy_roothub_suspend(hcd, hcd->phy_roothub);
dev_dbg(&rhdev->dev, "bus %s fail, err %d\n",
"resume", status);
if (status != -ESHUTDOWN)
@@ -2730,7 +2730,7 @@ int usb_add_hcd(struct usb_hcd *hcd,
struct usb_device *rhdev;
if (!hcd->skip_phy_initialization && usb_hcd_is_primary_hcd(hcd)) {
- hcd->phy_roothub = usb_phy_roothub_alloc(hcd->self.sysdev);
+ hcd->phy_roothub = usb_phy_roothub_alloc(hcd);
if (IS_ERR(hcd->phy_roothub))
return PTR_ERR(hcd->phy_roothub);
diff --git a/drivers/usb/core/phy.c b/drivers/usb/core/phy.c
index 38b2c776c4b4..8bfbacb52a7b 100644
--- a/drivers/usb/core/phy.c
+++ b/drivers/usb/core/phy.c
@@ -46,10 +46,11 @@ static int usb_phy_roothub_add_phy(struct device *dev, int index,
return 0;
}
-struct usb_phy_roothub *usb_phy_roothub_alloc(struct device *dev)
+struct usb_phy_roothub *usb_phy_roothub_alloc(struct usb_hcd *hcd)
{
struct usb_phy_roothub *phy_roothub;
int i, num_phys, err;
+ struct device *dev = hcd->self.sysdev;
if (!IS_ENABLED(CONFIG_GENERIC_PHY))
return NULL;
@@ -59,6 +60,9 @@ struct usb_phy_roothub *usb_phy_roothub_alloc(struct device *dev)
if (num_phys <= 0)
return NULL;
+ if (device_property_read_bool(dev, "phy-supplies-usb-clock"))
+ hcd->phy_supplies_usb_clock = 1;
+
phy_roothub = devm_kzalloc(dev, sizeof(*phy_roothub), GFP_KERNEL);
if (!phy_roothub)
return ERR_PTR(-ENOMEM);
@@ -162,26 +166,33 @@ void usb_phy_roothub_power_off(struct usb_phy_roothub *phy_roothub)
}
EXPORT_SYMBOL_GPL(usb_phy_roothub_power_off);
-int usb_phy_roothub_suspend(struct device *controller_dev,
+int usb_phy_roothub_suspend(struct usb_hcd *hcd,
struct usb_phy_roothub *phy_roothub)
{
+ struct device *controller_dev = hcd->self.sysdev;
+
usb_phy_roothub_power_off(phy_roothub);
- /* keep the PHYs initialized so the device can wake up the system */
- if (device_may_wakeup(controller_dev))
+ /*
+ * keep the PHYs initialized so the device can wake up the system
+ * or if needed to keep the USB clocks enabled.
+ */
+ if (device_may_wakeup(controller_dev) || hcd->phy_supplies_usb_clock)
return 0;
return usb_phy_roothub_exit(phy_roothub);
}
EXPORT_SYMBOL_GPL(usb_phy_roothub_suspend);
-int usb_phy_roothub_resume(struct device *controller_dev,
+int usb_phy_roothub_resume(struct usb_hcd *hcd,
struct usb_phy_roothub *phy_roothub)
{
+ struct device *controller_dev = hcd->self.sysdev;
int err;
- /* if the device can't wake up the system _exit was called */
- if (!device_may_wakeup(controller_dev)) {
+ /* if _exit was called on suspend */
+ if (!device_may_wakeup(controller_dev) &&
+ !hcd->phy_supplies_usb_clock) {
err = usb_phy_roothub_init(phy_roothub);
if (err)
return err;
@@ -190,7 +201,8 @@ int usb_phy_roothub_resume(struct device *controller_dev,
err = usb_phy_roothub_power_on(phy_roothub);
/* undo _init if _power_on failed */
- if (err && !device_may_wakeup(controller_dev))
+ if (err && !device_may_wakeup(controller_dev)
+ && !hcd->phy_supplies_usb_clock)
usb_phy_roothub_exit(phy_roothub);
return err;
diff --git a/drivers/usb/core/phy.h b/drivers/usb/core/phy.h
index 88a3c037e9df..34293e11a917 100644
--- a/drivers/usb/core/phy.h
+++ b/drivers/usb/core/phy.h
@@ -5,13 +5,16 @@
* Copyright (C) 2018 Martin Blumenstingl <[email protected]>
*/
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+
#ifndef __USB_CORE_PHY_H_
#define __USB_CORE_PHY_H_
struct device;
struct usb_phy_roothub;
-struct usb_phy_roothub *usb_phy_roothub_alloc(struct device *dev);
+struct usb_phy_roothub *usb_phy_roothub_alloc(struct usb_hcd *hcd);
int usb_phy_roothub_init(struct usb_phy_roothub *phy_roothub);
int usb_phy_roothub_exit(struct usb_phy_roothub *phy_roothub);
@@ -19,9 +22,9 @@
int usb_phy_roothub_power_on(struct usb_phy_roothub *phy_roothub);
void usb_phy_roothub_power_off(struct usb_phy_roothub *phy_roothub);
-int usb_phy_roothub_suspend(struct device *controller_dev,
+int usb_phy_roothub_suspend(struct usb_hcd *hcd,
struct usb_phy_roothub *phy_roothub);
-int usb_phy_roothub_resume(struct device *controller_dev,
+int usb_phy_roothub_resume(struct usb_hcd *hcd,
struct usb_phy_roothub *phy_roothub);
#endif /* __USB_CORE_PHY_H_ */
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index 97e2ddec18b1..7c42cf0f6835 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -157,6 +157,12 @@ struct usb_hcd {
*/
unsigned skip_phy_initialization:1;
+ /*
+ * Some phys supply the USB controller clocks and should not
+ * have exit called on suspend.
+ */
+ unsigned phy_supplies_usb_clock:1;
+
/* The next flag is a stopgap, to be removed when all the HCDs
* support the new root-hub polling mechanism. */
unsigned uses_new_polling:1;
--
1.9.0.138.g2de3478
Add support for Broadcom STB SoC's to the xhci platform driver
Signed-off-by: Al Cooper <[email protected]>
---
drivers/usb/host/xhci-brcm.c | 16 ++++++++++++++++
drivers/usb/host/xhci-brcm.h | 16 ++++++++++++++++
drivers/usb/host/xhci-plat.c | 8 ++++++++
3 files changed, 40 insertions(+)
create mode 100644 drivers/usb/host/xhci-brcm.c
create mode 100644 drivers/usb/host/xhci-brcm.h
diff --git a/drivers/usb/host/xhci-brcm.c b/drivers/usb/host/xhci-brcm.c
new file mode 100644
index 000000000000..bf8c0bfd1780
--- /dev/null
+++ b/drivers/usb/host/xhci-brcm.c
@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2018, Broadcom */
+
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+
+#include "xhci.h"
+
+int xhci_plat_brcm_init_quirk(struct usb_hcd *hcd)
+{
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ xhci->quirks |= XHCI_RESET_ON_RESUME;
+ return 0;
+}
+
diff --git a/drivers/usb/host/xhci-brcm.h b/drivers/usb/host/xhci-brcm.h
new file mode 100644
index 000000000000..e64800fae4d5
--- /dev/null
+++ b/drivers/usb/host/xhci-brcm.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (c) 2018, Broadcom */
+
+#ifndef _XHCI_BRCM_H
+#define _XHCI_BRCM_H
+
+#if IS_ENABLED(CONFIG_USB_XHCI_BRCM)
+int xhci_plat_brcm_init_quirk(struct usb_hcd *hcd);
+#else
+static inline int xhci_plat_brcm_init_quirk(struct usb_hcd *hcd)
+{
+ return 0;
+}
+#endif
+#endif /* _XHCI_BRCM_H */
+
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 32b5574ad5c5..5372d4040be6 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -24,6 +24,7 @@
#include "xhci-plat.h"
#include "xhci-mvebu.h"
#include "xhci-rcar.h"
+#include "xhci-brcm.h"
static struct hc_driver __read_mostly xhci_plat_hc_driver;
@@ -112,6 +113,10 @@ static int xhci_plat_start(struct usb_hcd *hcd)
.resume_quirk = xhci_rcar_resume_quirk,
};
+static const struct xhci_plat_priv xhci_plat_brcm = {
+ .init_quirk = xhci_plat_brcm_init_quirk
+};
+
static const struct of_device_id usb_xhci_of_match[] = {
{
.compatible = "generic-xhci",
@@ -144,6 +149,9 @@ static int xhci_plat_start(struct usb_hcd *hcd)
}, {
.compatible = "renesas,rcar-gen3-xhci",
.data = &xhci_plat_renesas_rcar_gen3,
+ }, {
+ .compatible = "brcm,bcm7445-xhci",
+ .data = &xhci_plat_brcm,
},
{},
};
--
1.9.0.138.g2de3478
From: kbuild test robot <[email protected]>
drivers/usb/host/ehci-brcm.c:258:3-8: No need to set .owner here. The core will do it.
Remove .owner field if calls are used which set it automatically
Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci
Fixes: 51b4c79a49f1 ("usb: host: Add ability to build new Broadcom STB USB drivers")
CC: Al Cooper <[email protected]>
Signed-off-by: kbuild test robot <[email protected]>
---
url: https://github.com/0day-ci/linux/commits/Al-Cooper/Add-XHCI-EHCI-and-OHCI-support-for-Broadcom-STB-SoS-s/20181110-065441
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
ehci-brcm.c | 1 -
1 file changed, 1 deletion(-)
--- a/drivers/usb/host/ehci-brcm.c
+++ b/drivers/usb/host/ehci-brcm.c
@@ -255,7 +255,6 @@ static struct platform_driver ehci_brcm_
.remove = ehci_brcm_remove,
.shutdown = usb_hcd_platform_shutdown,
.driver = {
- .owner = THIS_MODULE,
.name = "ehci-brcm",
.pm = &ehci_brcm_pm_ops,
.of_match_table = brcm_ehci_of_match,
Hi Al,
I love your patch! Perhaps something to improve:
[auto build test WARNING on usb/usb-testing]
[also build test WARNING on v4.20-rc1 next-20181109]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Al-Cooper/Add-XHCI-EHCI-and-OHCI-support-for-Broadcom-STB-SoS-s/20181110-065441
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
coccinelle warnings: (new ones prefixed by >>)
>> drivers/usb/host/ehci-brcm.c:258:3-8: No need to set .owner here. The core will do it.
Please review and possibly fold the followup patch.
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
On Fri, 9 Nov 2018 09:01:56 -0500, Al Cooper wrote:
> Add DT bindings for Broadcom STB USB EHCI and XHCI drivers.
> Add "phy-supplies-usb-clock" property description to usb-hcd.txt
>
> NOTE: The OHCI driver is not included because it uses the generic
> platform driver.
>
> Signed-off-by: Al Cooper <[email protected]>
> ---
> .../devicetree/bindings/usb/brcm,bcm7445-ehci.txt | 24 ++++++++++++++++++++++
> Documentation/devicetree/bindings/usb/usb-hcd.txt | 3 +++
> Documentation/devicetree/bindings/usb/usb-xhci.txt | 1 +
> 3 files changed, 28 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/usb/brcm,bcm7445-ehci.txt
>
Reviewed-by: Rob Herring <[email protected]>