linux-kernel - [PATCH v2 4/4] usb: host: Add ability to build new Broadcom STB USB drivers

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Message-Id: <20200327204711.10614-5-alcooperx@gmail.com>
Date:   Fri, 27 Mar 2020 16:47:11 -0400
From:   Al Cooper <alcooperx@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     andriy.shevchenko@...ux.intel.com, Al Cooper <alcooperx@...il.com>,
        Alan Stern <stern@...land.harvard.edu>,
        bcm-kernel-feedback-list@...adcom.com,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        devicetree@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jonathan Neuschäfer <j.neuschaefer@....net>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-usb@...r.kernel.org, Mark Rutland <mark.rutland@....com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Rob Herring <robh+dt@...nel.org>
Subject: [PATCH v2 4/4] usb: host: Add ability to build new Broadcom STB USB drivers

Add the build system changes needed to get the Broadcom STB XHCI,
EHCI and OHCI functionality working. The OHCI support does not
require anything unique to Broadcom so the standard ohci-platform
driver is being used. 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 <alcooperx@...il.com>
---
 MAINTAINERS               |  9 +++++++++
 drivers/usb/host/Kconfig  | 20 ++++++++++++++++++++
 drivers/usb/host/Makefile | 20 ++++++++++++++------
 3 files changed, 43 insertions(+), 6 deletions(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index 5a5332b3591d..978f3a574f64 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3433,6 +3433,15 @@ S:	Supported
 F:	drivers/i2c/busses/i2c-brcmstb.c
 F:	Documentation/devicetree/bindings/i2c/i2c-brcmstb.txt
 
+BROADCOM BRCMSTB USB XHCI and EHCI DRIVERS
+M:	Al Cooper <alcooperx@...il.com>
+L:	linux-usb@...r.kernel.org
+L:	bcm-kernel-feedback-list@...adcom.com
+S:	Maintained
+F:	drivers/usb/host/ehci-brcm.*
+F:	drivers/usb/host/xhci-brcm.*
+F:	Documentation/devicetree/bindings/usb/brcm,bcm7445-ehci.yaml
+
 BROADCOM BRCMSTB USB2 and USB3 PHY DRIVER
 M:	Al Cooper <alcooperx@...il.com>
 L:	linux-kernel@...r.kernel.org
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 55bdfdf11e4c..bc582ab6c5c8 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -97,6 +97,26 @@ config USB_XHCI_TEGRA
 
 endif # USB_XHCI_HCD
 
+config USB_EHCI_BRCMSTB
+       tristate
+
+config USB_XHCI_BRCMSTB
+       tristate
+
+config USB_BRCMSTB
+	tristate "Broadcom STB USB support"
+	depends on (ARCH_BRCMSTB && PHY_BRCM_USB) || COMPILE_TEST
+	select USB_OHCI_HCD_PLATFORM if USB_OHCI_HCD
+	select USB_EHCI_BRCMSTB if USB_EHCI_HCD
+	select USB_XHCI_BRCMSTB 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 b191361257cc..2a9a16047684 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -31,12 +31,25 @@ ifneq ($(CONFIG_USB_XHCI_RCAR), )
 	xhci-plat-hcd-y		+= xhci-rcar.o
 endif
 
+ifneq ($(CONFIG_USB_XHCI_BRCMSTB), )
+	xhci-plat-hcd-y		+= xhci-brcm.o
+endif
+
 ifneq ($(CONFIG_DEBUG_FS),)
 	xhci-hcd-y		+= xhci-debugfs.o
 endif
 
 obj-$(CONFIG_USB_PCI)	+= pci-quirks.o
 
+# NOTE: BRCMSTB systems require that xhci driver be linked before the
+# ehci/ohci drivers.
+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-$(CONFIG_USB_EHCI_HCD_PLATFORM)	+= ehci-platform.o
@@ -49,6 +62,7 @@ obj-$(CONFIG_USB_EHCI_HCD_STI)	+= ehci-st.o
 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_EHCI_BRCMSTB)	+= ehci-brcm.o
 
 obj-$(CONFIG_USB_OXU210HP_HCD)	+= oxu210hp-hcd.o
 obj-$(CONFIG_USB_ISP116X_HCD)	+= isp116x-hcd.o
@@ -69,12 +83,6 @@ 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
-- 
2.17.1