[PATCH v2 0/2] add support for HiSilicon STB xHCI host controller

[PATCH v2 0/2] add support for HiSilicon STB xHCI host controller

[sunjg79]

From: Jianguo Sun <sunjianguo1@huawei.com>

This patch set adds bindings doc and xhci driver for xHCI host controller
on HiSilicon STB SoCs.

v2 changes:
  - add optional properties in bindings doc
  - assign the value of imod_interval
  - remove unnecessary codes

Jianguo Sun (2):
  dt-bindings: usb: add bindings doc for HiSilicon STB xHCI host
    controller
  xhci: hisilicon: support HiSilicon STB xHCI host controller

 .../bindings/usb/hisilicon,histb-xhci.txt          |  46 +++
 drivers/usb/host/Kconfig                           |   7 +
 drivers/usb/host/Makefile                          |   1 +
 drivers/usb/host/xhci-histb.c                      | 413 +++++++++++++++++++++
 4 files changed, 467 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
 create mode 100644 drivers/usb/host/xhci-histb.c

-- 
2.7.4

[PATCH v2 1/2] dt-bindings: usb: add bindings doc for HiSilicon STB xHCI host controller

[sunjg79]

From: Jianguo Sun <sunjianguo1@huawei.com>

This commit adds bindings doc for HiSilicon STB xHCI host controller.

Signed-off-by: Jianguo Sun <sunjianguo1@huawei.com>
---
 .../bindings/usb/hisilicon,histb-xhci.txt          | 46 ++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt

diff --git a/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt b/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
new file mode 100644
index 0000000..b1a06f1
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
@@ -0,0 +1,46 @@
+HiSilicon STB xHCI
+
+The device node for HiSilicon STB xHCI host controller
+
+Required properties:
+ - compatible: should be "hisilicon,hi3798cv200-xhci"
+ - reg: specifies physical base address and size of the registers
+ - interrupts : interrupt used by the controller
+ - clocks: a list of phandle + clock-specifier pairs, one for each
+	entry in clock-names
+ - clock-names: must contain
+	"bus": for bus clock
+	"utmi": for utmi clock
+	"pipe": for pipeE clock
+	"suspend": for suspend clock
+ - resets: a list of phandle and reset specifier pairs as listed in
+	reset-names property.
+ - reset-names: must contain
+	"soft": for soft reset
+ - phys: a list of phandle + phy specifier pairs
+ - phy-names: must contain at least one of following:
+	"inno": for inno phy
+	"combo": for combo phy
+
+Optional properties:
+  - usb2-lpm-disable: indicate if we don't want to enable USB2 HW LPM
+  - usb3-lpm-capable: determines if platform is USB3 LPM capable
+  - quirk-broken-port-ped: set if the controller has broken port disable mechanism
+  - imod-interval-ns: default interrupt moderation interval is 40000ns
+
+Example:
+
+xhci0: xchi@f98a0000 {
+	compatible = "hisilicon,hi3798cv200-xhci";
+	reg = <0xf98a0000 0x10000>;
+	interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
+	clocks = <&crg HISTB_USB3_BUS_CLK>,
+		 <&crg HISTB_USB3_UTMI_CLK>,
+		 <&crg HISTB_USB3_PIPE_CLK>,
+		 <&crg HISTB_USB3_SUSPEND_CLK>;
+	clock-names = "bus", "utmi", "pipe", "suspend";
+	resets = <&crg 0xb0 12>;
+	reset-names = "soft";
+	phys = <&usb2_phy1_port1 0>, <&combphy0 PHY_TYPE_USB3>;
+	phy-names = "inno", "combo";
+};
-- 
2.7.4

[v2,1/2] dt-bindings: usb: add bindings doc for HiSilicon STB xHCI host controller

[sunjg79]

From: Jianguo Sun <sunjianguo1@huawei.com>

This commit adds bindings doc for HiSilicon STB xHCI host controller.

Signed-off-by: Jianguo Sun <sunjianguo1@huawei.com>
---
 .../bindings/usb/hisilicon,histb-xhci.txt          | 46 ++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt

diff --git a/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt b/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
new file mode 100644
index 0000000..b1a06f1
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
@@ -0,0 +1,46 @@
+HiSilicon STB xHCI
+
+The device node for HiSilicon STB xHCI host controller
+
+Required properties:
+ - compatible: should be "hisilicon,hi3798cv200-xhci"
+ - reg: specifies physical base address and size of the registers
+ - interrupts : interrupt used by the controller
+ - clocks: a list of phandle + clock-specifier pairs, one for each
+	entry in clock-names
+ - clock-names: must contain
+	"bus": for bus clock
+	"utmi": for utmi clock
+	"pipe": for pipeE clock
+	"suspend": for suspend clock
+ - resets: a list of phandle and reset specifier pairs as listed in
+	reset-names property.
+ - reset-names: must contain
+	"soft": for soft reset
+ - phys: a list of phandle + phy specifier pairs
+ - phy-names: must contain at least one of following:
+	"inno": for inno phy
+	"combo": for combo phy
+
+Optional properties:
+  - usb2-lpm-disable: indicate if we don't want to enable USB2 HW LPM
+  - usb3-lpm-capable: determines if platform is USB3 LPM capable
+  - quirk-broken-port-ped: set if the controller has broken port disable mechanism
+  - imod-interval-ns: default interrupt moderation interval is 40000ns
+
+Example:
+
+xhci0: xchi@f98a0000 {
+	compatible = "hisilicon,hi3798cv200-xhci";
+	reg = <0xf98a0000 0x10000>;
+	interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
+	clocks = <&crg HISTB_USB3_BUS_CLK>,
+		 <&crg HISTB_USB3_UTMI_CLK>,
+		 <&crg HISTB_USB3_PIPE_CLK>,
+		 <&crg HISTB_USB3_SUSPEND_CLK>;
+	clock-names = "bus", "utmi", "pipe", "suspend";
+	resets = <&crg 0xb0 12>;
+	reset-names = "soft";
+	phys = <&usb2_phy1_port1 0>, <&combphy0 PHY_TYPE_USB3>;
+	phy-names = "inno", "combo";
+};

Re: [PATCH v2 1/2] dt-bindings: usb: add bindings doc for HiSilicon STB xHCI host controller

[Rob Herring]

On Sat, May 05, 2018 at 06:09:49PM +0800, sunjg79@163.com wrote:
> From: Jianguo Sun <sunjianguo1@huawei.com>
> 
> This commit adds bindings doc for HiSilicon STB xHCI host controller.
> 
> Signed-off-by: Jianguo Sun <sunjianguo1@huawei.com>
> ---
>  .../bindings/usb/hisilicon,histb-xhci.txt          | 46 ++++++++++++++++++++++
>  1 file changed, 46 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
> 
> diff --git a/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt b/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
> new file mode 100644
> index 0000000..b1a06f1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
> @@ -0,0 +1,46 @@
> +HiSilicon STB xHCI
> +
> +The device node for HiSilicon STB xHCI host controller
> +
> +Required properties:
> + - compatible: should be "hisilicon,hi3798cv200-xhci"
> + - reg: specifies physical base address and size of the registers
> + - interrupts : interrupt used by the controller
> + - clocks: a list of phandle + clock-specifier pairs, one for each
> +	entry in clock-names
> + - clock-names: must contain
> +	"bus": for bus clock
> +	"utmi": for utmi clock
> +	"pipe": for pipeE clock
> +	"suspend": for suspend clock
> + - resets: a list of phandle and reset specifier pairs as listed in
> +	reset-names property.
> + - reset-names: must contain
> +	"soft": for soft reset
> + - phys: a list of phandle + phy specifier pairs
> + - phy-names: must contain at least one of following:
> +	"inno": for inno phy
> +	"combo": for combo phy
> +
> +Optional properties:
> +  - usb2-lpm-disable: indicate if we don't want to enable USB2 HW LPM
> +  - usb3-lpm-capable: determines if platform is USB3 LPM capable
> +  - quirk-broken-port-ped: set if the controller has broken port disable mechanism

This should either be true or not based on the compatible string.

> +  - imod-interval-ns: default interrupt moderation interval is 40000ns
> +
> +Example:
> +
> +xhci0: xchi@f98a0000 {
> +	compatible = "hisilicon,hi3798cv200-xhci";
> +	reg = <0xf98a0000 0x10000>;
> +	interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
> +	clocks = <&crg HISTB_USB3_BUS_CLK>,
> +		 <&crg HISTB_USB3_UTMI_CLK>,
> +		 <&crg HISTB_USB3_PIPE_CLK>,
> +		 <&crg HISTB_USB3_SUSPEND_CLK>;
> +	clock-names = "bus", "utmi", "pipe", "suspend";
> +	resets = <&crg 0xb0 12>;
> +	reset-names = "soft";
> +	phys = <&usb2_phy1_port1 0>, <&combphy0 PHY_TYPE_USB3>;
> +	phy-names = "inno", "combo";
> +};
> -- 
> 2.7.4
> 
> 
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[v2,1/2] dt-bindings: usb: add bindings doc for HiSilicon STB xHCI host controller

[Rob Herring]

On Sat, May 05, 2018 at 06:09:49PM +0800, sunjg79@163.com wrote:
> From: Jianguo Sun <sunjianguo1@huawei.com>
> 
> This commit adds bindings doc for HiSilicon STB xHCI host controller.
> 
> Signed-off-by: Jianguo Sun <sunjianguo1@huawei.com>
> ---
>  .../bindings/usb/hisilicon,histb-xhci.txt          | 46 ++++++++++++++++++++++
>  1 file changed, 46 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
> 
> diff --git a/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt b/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
> new file mode 100644
> index 0000000..b1a06f1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
> @@ -0,0 +1,46 @@
> +HiSilicon STB xHCI
> +
> +The device node for HiSilicon STB xHCI host controller
> +
> +Required properties:
> + - compatible: should be "hisilicon,hi3798cv200-xhci"
> + - reg: specifies physical base address and size of the registers
> + - interrupts : interrupt used by the controller
> + - clocks: a list of phandle + clock-specifier pairs, one for each
> +	entry in clock-names
> + - clock-names: must contain
> +	"bus": for bus clock
> +	"utmi": for utmi clock
> +	"pipe": for pipeE clock
> +	"suspend": for suspend clock
> + - resets: a list of phandle and reset specifier pairs as listed in
> +	reset-names property.
> + - reset-names: must contain
> +	"soft": for soft reset
> + - phys: a list of phandle + phy specifier pairs
> + - phy-names: must contain at least one of following:
> +	"inno": for inno phy
> +	"combo": for combo phy
> +
> +Optional properties:
> +  - usb2-lpm-disable: indicate if we don't want to enable USB2 HW LPM
> +  - usb3-lpm-capable: determines if platform is USB3 LPM capable
> +  - quirk-broken-port-ped: set if the controller has broken port disable mechanism

This should either be true or not based on the compatible string.

> +  - imod-interval-ns: default interrupt moderation interval is 40000ns
> +
> +Example:
> +
> +xhci0: xchi@f98a0000 {
> +	compatible = "hisilicon,hi3798cv200-xhci";
> +	reg = <0xf98a0000 0x10000>;
> +	interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
> +	clocks = <&crg HISTB_USB3_BUS_CLK>,
> +		 <&crg HISTB_USB3_UTMI_CLK>,
> +		 <&crg HISTB_USB3_PIPE_CLK>,
> +		 <&crg HISTB_USB3_SUSPEND_CLK>;
> +	clock-names = "bus", "utmi", "pipe", "suspend";
> +	resets = <&crg 0xb0 12>;
> +	reset-names = "soft";
> +	phys = <&usb2_phy1_port1 0>, <&combphy0 PHY_TYPE_USB3>;
> +	phy-names = "inno", "combo";
> +};
> -- 
> 2.7.4
> 
> 
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Re: [PATCH v2 1/2] dt-bindings: usb: add bindings doc for HiSilicon STB xHCI host controller

[Jianguo Sun]

Hi Rob,


On 05/08/2018 01:09 AM, Rob Herring wrote:
> On Sat, May 05, 2018 at 06:09:49PM +0800, sunjg79@163.com wrote:
>> From: Jianguo Sun <sunjianguo1@huawei.com>
>>
>> This commit adds bindings doc for HiSilicon STB xHCI host controller.
>>
>> Signed-off-by: Jianguo Sun <sunjianguo1@huawei.com>
>> ---
>>   .../bindings/usb/hisilicon,histb-xhci.txt          | 46 ++++++++++++++++++++++
>>   1 file changed, 46 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
>>
>> diff --git a/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt b/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
>> new file mode 100644
>> index 0000000..b1a06f1
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
>> @@ -0,0 +1,46 @@
>> +HiSilicon STB xHCI
>> +
>> +The device node for HiSilicon STB xHCI host controller
>> +
>> +Required properties:
>> + - compatible: should be "hisilicon,hi3798cv200-xhci"
>> + - reg: specifies physical base address and size of the registers
>> + - interrupts : interrupt used by the controller
>> + - clocks: a list of phandle + clock-specifier pairs, one for each
>> +	entry in clock-names
>> + - clock-names: must contain
>> +	"bus": for bus clock
>> +	"utmi": for utmi clock
>> +	"pipe": for pipeE clock
>> +	"suspend": for suspend clock
>> + - resets: a list of phandle and reset specifier pairs as listed in
>> +	reset-names property.
>> + - reset-names: must contain
>> +	"soft": for soft reset
>> + - phys: a list of phandle + phy specifier pairs
>> + - phy-names: must contain at least one of following:
>> +	"inno": for inno phy
>> +	"combo": for combo phy
>> +
>> +Optional properties:
>> +  - usb2-lpm-disable: indicate if we don't want to enable USB2 HW LPM
>> +  - usb3-lpm-capable: determines if platform is USB3 LPM capable
>> +  - quirk-broken-port-ped: set if the controller has broken port disable mechanism
> This should either be true or not based on the compatible string.
This is borrowed from usb-xhci.txt, and I wasn't aware that it was a 
workaround.
Since this issue doesn't occur on Hi3798CV200 SoC, I will remove this 
property in v3.
Thanks.
>> +  - imod-interval-ns: default interrupt moderation interval is 40000ns
>> +
>> +Example:
>> +
>> +xhci0: xchi@f98a0000 {
>> +	compatible = "hisilicon,hi3798cv200-xhci";
>> +	reg = <0xf98a0000 0x10000>;
>> +	interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
>> +	clocks = <&crg HISTB_USB3_BUS_CLK>,
>> +		 <&crg HISTB_USB3_UTMI_CLK>,
>> +		 <&crg HISTB_USB3_PIPE_CLK>,
>> +		 <&crg HISTB_USB3_SUSPEND_CLK>;
>> +	clock-names = "bus", "utmi", "pipe", "suspend";
>> +	resets = <&crg 0xb0 12>;
>> +	reset-names = "soft";
>> +	phys = <&usb2_phy1_port1 0>, <&combphy0 PHY_TYPE_USB3>;
>> +	phy-names = "inno", "combo";
>> +};
>> -- 
>> 2.7.4
>>
>>
>> --
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>> the body of a message to majordomo@vger.kernel.org
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[v2,1/2] dt-bindings: usb: add bindings doc for HiSilicon STB xHCI host controller

[sunjg79]

Hi Rob,


On 05/08/2018 01:09 AM, Rob Herring wrote:
> On Sat, May 05, 2018 at 06:09:49PM +0800, sunjg79@163.com wrote:
>> From: Jianguo Sun <sunjianguo1@huawei.com>
>>
>> This commit adds bindings doc for HiSilicon STB xHCI host controller.
>>
>> Signed-off-by: Jianguo Sun <sunjianguo1@huawei.com>
>> ---
>>   .../bindings/usb/hisilicon,histb-xhci.txt          | 46 ++++++++++++++++++++++
>>   1 file changed, 46 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
>>
>> diff --git a/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt b/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
>> new file mode 100644
>> index 0000000..b1a06f1
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/usb/hisilicon,histb-xhci.txt
>> @@ -0,0 +1,46 @@
>> +HiSilicon STB xHCI
>> +
>> +The device node for HiSilicon STB xHCI host controller
>> +
>> +Required properties:
>> + - compatible: should be "hisilicon,hi3798cv200-xhci"
>> + - reg: specifies physical base address and size of the registers
>> + - interrupts : interrupt used by the controller
>> + - clocks: a list of phandle + clock-specifier pairs, one for each
>> +	entry in clock-names
>> + - clock-names: must contain
>> +	"bus": for bus clock
>> +	"utmi": for utmi clock
>> +	"pipe": for pipeE clock
>> +	"suspend": for suspend clock
>> + - resets: a list of phandle and reset specifier pairs as listed in
>> +	reset-names property.
>> + - reset-names: must contain
>> +	"soft": for soft reset
>> + - phys: a list of phandle + phy specifier pairs
>> + - phy-names: must contain at least one of following:
>> +	"inno": for inno phy
>> +	"combo": for combo phy
>> +
>> +Optional properties:
>> +  - usb2-lpm-disable: indicate if we don't want to enable USB2 HW LPM
>> +  - usb3-lpm-capable: determines if platform is USB3 LPM capable
>> +  - quirk-broken-port-ped: set if the controller has broken port disable mechanism
> This should either be true or not based on the compatible string.
This is borrowed from usb-xhci.txt, and I wasn't aware that it was a 
workaround.
Since this issue doesn't occur on Hi3798CV200 SoC, I will remove this 
property in v3.
Thanks.
>> +  - imod-interval-ns: default interrupt moderation interval is 40000ns
>> +
>> +Example:
>> +
>> +xhci0: xchi@f98a0000 {
>> +	compatible = "hisilicon,hi3798cv200-xhci";
>> +	reg = <0xf98a0000 0x10000>;
>> +	interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
>> +	clocks = <&crg HISTB_USB3_BUS_CLK>,
>> +		 <&crg HISTB_USB3_UTMI_CLK>,
>> +		 <&crg HISTB_USB3_PIPE_CLK>,
>> +		 <&crg HISTB_USB3_SUSPEND_CLK>;
>> +	clock-names = "bus", "utmi", "pipe", "suspend";
>> +	resets = <&crg 0xb0 12>;
>> +	reset-names = "soft";
>> +	phys = <&usb2_phy1_port1 0>, <&combphy0 PHY_TYPE_USB3>;
>> +	phy-names = "inno", "combo";
>> +};
>> -- 
>> 2.7.4
>>
>>
>> --
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>> the body of a message to majordomo@vger.kernel.org
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[PATCH v2 2/2] xhci: hisilicon: support HiSilicon STB xHCI host controller

[sunjg79]

From: Jianguo Sun <sunjianguo1@huawei.com>

This commit adds support for HiSilicon STB xHCI host controller.
There are two xHCI host controllers on HiSilicon STB SoCs. Each
one requires additional configuration before exposing interface
compliant with xHCI.

Reviewed-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Jianguo Sun <sunjianguo1@huawei.com>
---
 drivers/usb/host/Kconfig      |   7 +
 drivers/usb/host/Makefile     |   1 +
 drivers/usb/host/xhci-histb.c | 413 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 421 insertions(+)
 create mode 100644 drivers/usb/host/xhci-histb.c

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 5d958da..c813fc4 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -52,6 +52,13 @@ config USB_XHCI_PLATFORM
 
 	  If unsure, say N.
 
+config USB_XHCI_HISTB
+	tristate "xHCI support for HiSilicon STB SoCs"
+	depends on USB_XHCI_PLATFORM && (ARCH_HISI || COMPILE_TEST)
+	help
+	  Say 'Y' to enable the support for the xHCI host controller
+	  found in HiSilicon STB SoCs.
+
 config USB_XHCI_MTK
 	tristate "xHCI support for MediaTek SoCs"
 	select MFD_SYSCON
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 8a8cffe..9b669c9 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -74,6 +74,7 @@ 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
diff --git a/drivers/usb/host/xhci-histb.c b/drivers/usb/host/xhci-histb.c
new file mode 100644
index 0000000..dda547e
--- /dev/null
+++ b/drivers/usb/host/xhci-histb.c
@@ -0,0 +1,413 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * xHCI host controller driver for HiSilicon STB SoCs
+ *
+ * Copyright (C) 2017-2018 HiSilicon Co., Ltd. http://www.hisilicon.com
+ *
+ * Authors: Jianguo Sun <sunjianguo1@huawei.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#include "xhci.h"
+
+#define GTXTHRCFG		0xc108
+#define GRXTHRCFG		0xc10c
+#define REG_GUSB2PHYCFG0	0xc200
+#define BIT_UTMI_8_16		BIT(3)
+#define BIT_UTMI_ULPI		BIT(4)
+#define BIT_FREECLK_EXIST	BIT(30)
+
+#define REG_GUSB3PIPECTL0	0xc2c0
+#define USB3_DEEMPHASIS_MASK	GENMASK(2, 1)
+#define USB3_DEEMPHASIS0	BIT(1)
+#define USB3_TX_MARGIN1		BIT(4)
+
+struct xhci_hcd_histb {
+	struct device		*dev;
+	struct usb_hcd		*hcd;
+	void __iomem		*ctrl;
+	struct clk		*bus_clk;
+	struct clk		*utmi_clk;
+	struct clk		*pipe_clk;
+	struct clk		*suspend_clk;
+	struct reset_control	*soft_reset;
+};
+
+static inline struct xhci_hcd_histb *hcd_to_histb(struct usb_hcd *hcd)
+{
+	return dev_get_drvdata(hcd->self.controller);
+}
+
+static int xhci_histb_config(struct xhci_hcd_histb *histb)
+{
+	struct device_node *np = histb->dev->of_node;
+	u32 regval;
+
+	if (of_property_match_string(np, "phys-names", "inno") >= 0) {
+		/* USB2 PHY chose ulpi 8bit interface */
+		regval = readl(histb->ctrl + REG_GUSB2PHYCFG0);
+		regval &= ~BIT_UTMI_ULPI;
+		regval &= ~(BIT_UTMI_8_16);
+		regval &= ~BIT_FREECLK_EXIST;
+		writel(regval, histb->ctrl + REG_GUSB2PHYCFG0);
+	}
+
+	if (of_property_match_string(np, "phys-names", "combo") >= 0) {
+		/*
+		 * write 0x010c0012 to GUSB3PIPECTL0
+		 * GUSB3PIPECTL0[5:3] = 010 : Tx Margin = 900mV ,
+		 * decrease TX voltage
+		 * GUSB3PIPECTL0[2:1] = 01 : Tx Deemphasis = -3.5dB,
+		 * refer to xHCI spec
+		 */
+		regval = readl(histb->ctrl + REG_GUSB3PIPECTL0);
+		regval &= ~USB3_DEEMPHASIS_MASK;
+		regval |= USB3_DEEMPHASIS0;
+		regval |= USB3_TX_MARGIN1;
+		writel(regval, histb->ctrl + REG_GUSB3PIPECTL0);
+	}
+
+	writel(0x23100000, histb->ctrl + GTXTHRCFG);
+	writel(0x23100000, histb->ctrl + GRXTHRCFG);
+
+	return 0;
+}
+
+static int xhci_histb_clks_get(struct xhci_hcd_histb *histb)
+{
+	struct device *dev = histb->dev;
+
+	histb->bus_clk = devm_clk_get(dev, "bus");
+	if (IS_ERR(histb->bus_clk)) {
+		dev_err(dev, "fail to get bus clk\n");
+		return PTR_ERR(histb->bus_clk);
+	}
+
+	histb->utmi_clk = devm_clk_get(dev, "utmi");
+	if (IS_ERR(histb->utmi_clk)) {
+		dev_err(dev, "fail to get utmi clk\n");
+		return PTR_ERR(histb->utmi_clk);
+	}
+
+	histb->pipe_clk = devm_clk_get(dev, "pipe");
+	if (IS_ERR(histb->pipe_clk)) {
+		dev_err(dev, "fail to get pipe clk\n");
+		return PTR_ERR(histb->pipe_clk);
+	}
+
+	histb->suspend_clk = devm_clk_get(dev, "suspend");
+	if (IS_ERR(histb->suspend_clk)) {
+		dev_err(dev, "fail to get suspend clk\n");
+		return PTR_ERR(histb->suspend_clk);
+	}
+
+	return 0;
+}
+
+static int xhci_histb_host_enable(struct xhci_hcd_histb *histb)
+{
+	int ret;
+
+	ret = clk_prepare_enable(histb->bus_clk);
+	if (ret) {
+		dev_err(histb->dev, "failed to enable bus clk\n");
+		return ret;
+	}
+
+	ret = clk_prepare_enable(histb->utmi_clk);
+	if (ret) {
+		dev_err(histb->dev, "failed to enable utmi clk\n");
+		goto err_utmi_clk;
+	}
+
+	ret = clk_prepare_enable(histb->pipe_clk);
+	if (ret) {
+		dev_err(histb->dev, "failed to enable pipe clk\n");
+		goto err_pipe_clk;
+	}
+
+	ret = clk_prepare_enable(histb->suspend_clk);
+	if (ret) {
+		dev_err(histb->dev, "failed to enable suspend clk\n");
+		goto err_suspend_clk;
+	}
+
+	reset_control_deassert(histb->soft_reset);
+
+	return 0;
+
+err_suspend_clk:
+	clk_disable_unprepare(histb->pipe_clk);
+err_pipe_clk:
+	clk_disable_unprepare(histb->utmi_clk);
+err_utmi_clk:
+	clk_disable_unprepare(histb->bus_clk);
+
+	return ret;
+}
+
+static void xhci_histb_host_disable(struct xhci_hcd_histb *histb)
+{
+	reset_control_assert(histb->soft_reset);
+
+	clk_disable_unprepare(histb->suspend_clk);
+	clk_disable_unprepare(histb->pipe_clk);
+	clk_disable_unprepare(histb->utmi_clk);
+	clk_disable_unprepare(histb->bus_clk);
+}
+
+static void xhci_histb_quirks(struct device *dev, struct xhci_hcd *xhci)
+{
+	/*
+	 * As of now platform drivers don't provide MSI support so we ensure
+	 * here that the generic code does not try to make a pci_dev from our
+	 * dev struct in order to setup MSI
+	 */
+	xhci->quirks |= XHCI_PLAT;
+}
+
+/* called during probe() after chip reset completes */
+static int xhci_histb_setup(struct usb_hcd *hcd)
+{
+	struct xhci_hcd_histb *histb = hcd_to_histb(hcd);
+	int ret;
+
+	if (usb_hcd_is_primary_hcd(hcd)) {
+		ret = xhci_histb_config(histb);
+		if (ret)
+			return ret;
+	}
+
+	return xhci_gen_setup(hcd, xhci_histb_quirks);
+}
+
+static const struct xhci_driver_overrides xhci_histb_overrides __initconst = {
+	.reset = xhci_histb_setup,
+};
+
+static struct hc_driver __read_mostly xhci_histb_hc_driver;
+static int xhci_histb_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct xhci_hcd_histb *histb;
+	const struct hc_driver *driver;
+	struct usb_hcd *hcd;
+	struct xhci_hcd *xhci;
+	struct resource *res;
+	int irq;
+	int ret = -ENODEV;
+
+	if (usb_disabled())
+		return -ENODEV;
+
+	driver = &xhci_histb_hc_driver;
+	histb = devm_kzalloc(dev, sizeof(*histb), GFP_KERNEL);
+	if (!histb)
+		return -ENOMEM;
+
+	histb->dev = dev;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	histb->ctrl = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(histb->ctrl))
+		return PTR_ERR(histb->ctrl);
+
+	ret = xhci_histb_clks_get(histb);
+	if (ret)
+		return ret;
+
+	histb->soft_reset = devm_reset_control_get(dev, "soft");
+	if (IS_ERR(histb->soft_reset)) {
+		dev_err(dev, "failed to get soft reset\n");
+		return PTR_ERR(histb->soft_reset);
+	}
+
+	pm_runtime_enable(dev);
+	pm_runtime_get_sync(dev);
+	device_enable_async_suspend(dev);
+
+	/* Initialize dma_mask and coherent_dma_mask to 32-bits */
+	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
+	if (ret)
+		return ret;
+
+	hcd = usb_create_hcd(driver, dev, dev_name(dev));
+	if (!hcd) {
+		ret = -ENOMEM;
+		goto disable_pm;
+	}
+
+	hcd->regs = histb->ctrl;
+	hcd->rsrc_start = res->start;
+	hcd->rsrc_len = resource_size(res);
+
+	histb->hcd = hcd;
+	dev_set_drvdata(hcd->self.controller, histb);
+
+	ret = xhci_histb_host_enable(histb);
+	if (ret)
+		goto put_hcd;
+
+	xhci = hcd_to_xhci(hcd);
+
+	device_wakeup_enable(hcd->self.controller);
+
+	xhci->main_hcd = hcd;
+	xhci->shared_hcd = usb_create_shared_hcd(driver, dev, dev_name(dev),
+						 hcd);
+	if (!xhci->shared_hcd) {
+		ret = -ENOMEM;
+		goto disable_host;
+	}
+
+	if (device_property_read_bool(dev, "usb2-lpm-disable"))
+		xhci->quirks |= XHCI_HW_LPM_DISABLE;
+
+	if (device_property_read_bool(dev, "usb3-lpm-capable"))
+		xhci->quirks |= XHCI_LPM_SUPPORT;
+
+	if (device_property_read_bool(dev, "quirk-broken-port-ped"))
+		xhci->quirks |= XHCI_BROKEN_PORT_PED;
+
+	/* imod_interval is the interrupt moderation value in nanoseconds. */
+	xhci->imod_interval = 40000;
+	device_property_read_u32(dev, "imod-interval-ns",
+				 &xhci->imod_interval);
+
+	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
+	if (ret)
+		goto put_usb3_hcd;
+
+	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
+		xhci->shared_hcd->can_do_streams = 1;
+
+	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
+	if (ret)
+		goto dealloc_usb2_hcd;
+
+	device_enable_async_suspend(dev);
+	pm_runtime_put_noidle(dev);
+
+	/*
+	 * Prevent runtime pm from being on as default, users should enable
+	 * runtime pm using power/control in sysfs.
+	 */
+	pm_runtime_forbid(dev);
+
+	return 0;
+
+dealloc_usb2_hcd:
+	usb_remove_hcd(hcd);
+put_usb3_hcd:
+	usb_put_hcd(xhci->shared_hcd);
+disable_host:
+	xhci_histb_host_disable(histb);
+put_hcd:
+	usb_put_hcd(hcd);
+disable_pm:
+	pm_runtime_put_sync(dev);
+	pm_runtime_disable(dev);
+
+	return ret;
+}
+
+static int xhci_histb_remove(struct platform_device *dev)
+{
+	struct xhci_hcd_histb *histb = platform_get_drvdata(dev);
+	struct usb_hcd *hcd = histb->hcd;
+	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
+
+	xhci->xhc_state |= XHCI_STATE_REMOVING;
+
+	usb_remove_hcd(xhci->shared_hcd);
+	device_wakeup_disable(&dev->dev);
+
+	usb_remove_hcd(hcd);
+	usb_put_hcd(xhci->shared_hcd);
+
+	xhci_histb_host_disable(histb);
+	usb_put_hcd(hcd);
+	pm_runtime_put_sync(&dev->dev);
+	pm_runtime_disable(&dev->dev);
+
+	return 0;
+}
+
+static int __maybe_unused xhci_histb_suspend(struct device *dev)
+{
+	struct xhci_hcd_histb *histb = dev_get_drvdata(dev);
+	struct usb_hcd *hcd = histb->hcd;
+	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
+	int ret;
+
+	ret = xhci_suspend(xhci, device_may_wakeup(dev));
+
+	if (!device_may_wakeup(dev))
+		xhci_histb_host_disable(histb);
+
+	return ret;
+}
+
+static int __maybe_unused xhci_histb_resume(struct device *dev)
+{
+	struct xhci_hcd_histb *histb = dev_get_drvdata(dev);
+	struct usb_hcd *hcd = histb->hcd;
+	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+	if (!device_may_wakeup(dev))
+		xhci_histb_host_enable(histb);
+
+	return xhci_resume(xhci, 0);
+}
+
+static const struct dev_pm_ops xhci_histb_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(xhci_histb_suspend, xhci_histb_resume)
+};
+#define DEV_PM_OPS (IS_ENABLED(CONFIG_PM) ? &xhci_histb_pm_ops : NULL)
+
+#ifdef CONFIG_OF
+static const struct of_device_id histb_xhci_of_match[] = {
+	{ .compatible = "hisilicon,hi3798cv200-xhci"},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, histb_xhci_of_match);
+#endif
+
+static struct platform_driver histb_xhci_driver = {
+	.probe	= xhci_histb_probe,
+	.remove	= xhci_histb_remove,
+	.driver	= {
+		.name = "xhci-histb",
+		.pm = DEV_PM_OPS,
+		.of_match_table = of_match_ptr(histb_xhci_of_match),
+	},
+};
+MODULE_ALIAS("platform:xhci-histb");
+
+static int __init xhci_histb_init(void)
+{
+	xhci_init_driver(&xhci_histb_hc_driver, &xhci_histb_overrides);
+	return platform_driver_register(&histb_xhci_driver);
+}
+module_init(xhci_histb_init);
+
+static void __exit xhci_histb_exit(void)
+{
+	platform_driver_unregister(&histb_xhci_driver);
+}
+module_exit(xhci_histb_exit);
+
+MODULE_DESCRIPTION("HiSilicon STB xHCI Host Controller Driver");
+MODULE_LICENSE("GPL v2");
-- 
2.7.4

[v2,2/2] xhci: hisilicon: support HiSilicon STB xHCI host controller

[sunjg79]

From: Jianguo Sun <sunjianguo1@huawei.com>

This commit adds support for HiSilicon STB xHCI host controller.
There are two xHCI host controllers on HiSilicon STB SoCs. Each
one requires additional configuration before exposing interface
compliant with xHCI.

Reviewed-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Jianguo Sun <sunjianguo1@huawei.com>
---
 drivers/usb/host/Kconfig      |   7 +
 drivers/usb/host/Makefile     |   1 +
 drivers/usb/host/xhci-histb.c | 413 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 421 insertions(+)
 create mode 100644 drivers/usb/host/xhci-histb.c

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 5d958da..c813fc4 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -52,6 +52,13 @@ config USB_XHCI_PLATFORM
 
 	  If unsure, say N.
 
+config USB_XHCI_HISTB
+	tristate "xHCI support for HiSilicon STB SoCs"
+	depends on USB_XHCI_PLATFORM && (ARCH_HISI || COMPILE_TEST)
+	help
+	  Say 'Y' to enable the support for the xHCI host controller
+	  found in HiSilicon STB SoCs.
+
 config USB_XHCI_MTK
 	tristate "xHCI support for MediaTek SoCs"
 	select MFD_SYSCON
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 8a8cffe..9b669c9 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -74,6 +74,7 @@ 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
diff --git a/drivers/usb/host/xhci-histb.c b/drivers/usb/host/xhci-histb.c
new file mode 100644
index 0000000..dda547e
--- /dev/null
+++ b/drivers/usb/host/xhci-histb.c
@@ -0,0 +1,413 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * xHCI host controller driver for HiSilicon STB SoCs
+ *
+ * Copyright (C) 2017-2018 HiSilicon Co., Ltd. http://www.hisilicon.com
+ *
+ * Authors: Jianguo Sun <sunjianguo1@huawei.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#include "xhci.h"
+
+#define GTXTHRCFG		0xc108
+#define GRXTHRCFG		0xc10c
+#define REG_GUSB2PHYCFG0	0xc200
+#define BIT_UTMI_8_16		BIT(3)
+#define BIT_UTMI_ULPI		BIT(4)
+#define BIT_FREECLK_EXIST	BIT(30)
+
+#define REG_GUSB3PIPECTL0	0xc2c0
+#define USB3_DEEMPHASIS_MASK	GENMASK(2, 1)
+#define USB3_DEEMPHASIS0	BIT(1)
+#define USB3_TX_MARGIN1		BIT(4)
+
+struct xhci_hcd_histb {
+	struct device		*dev;
+	struct usb_hcd		*hcd;
+	void __iomem		*ctrl;
+	struct clk		*bus_clk;
+	struct clk		*utmi_clk;
+	struct clk		*pipe_clk;
+	struct clk		*suspend_clk;
+	struct reset_control	*soft_reset;
+};
+
+static inline struct xhci_hcd_histb *hcd_to_histb(struct usb_hcd *hcd)
+{
+	return dev_get_drvdata(hcd->self.controller);
+}
+
+static int xhci_histb_config(struct xhci_hcd_histb *histb)
+{
+	struct device_node *np = histb->dev->of_node;
+	u32 regval;
+
+	if (of_property_match_string(np, "phys-names", "inno") >= 0) {
+		/* USB2 PHY chose ulpi 8bit interface */
+		regval = readl(histb->ctrl + REG_GUSB2PHYCFG0);
+		regval &= ~BIT_UTMI_ULPI;
+		regval &= ~(BIT_UTMI_8_16);
+		regval &= ~BIT_FREECLK_EXIST;
+		writel(regval, histb->ctrl + REG_GUSB2PHYCFG0);
+	}
+
+	if (of_property_match_string(np, "phys-names", "combo") >= 0) {
+		/*
+		 * write 0x010c0012 to GUSB3PIPECTL0
+		 * GUSB3PIPECTL0[5:3] = 010 : Tx Margin = 900mV ,
+		 * decrease TX voltage
+		 * GUSB3PIPECTL0[2:1] = 01 : Tx Deemphasis = -3.5dB,
+		 * refer to xHCI spec
+		 */
+		regval = readl(histb->ctrl + REG_GUSB3PIPECTL0);
+		regval &= ~USB3_DEEMPHASIS_MASK;
+		regval |= USB3_DEEMPHASIS0;
+		regval |= USB3_TX_MARGIN1;
+		writel(regval, histb->ctrl + REG_GUSB3PIPECTL0);
+	}
+
+	writel(0x23100000, histb->ctrl + GTXTHRCFG);
+	writel(0x23100000, histb->ctrl + GRXTHRCFG);
+
+	return 0;
+}
+
+static int xhci_histb_clks_get(struct xhci_hcd_histb *histb)
+{
+	struct device *dev = histb->dev;
+
+	histb->bus_clk = devm_clk_get(dev, "bus");
+	if (IS_ERR(histb->bus_clk)) {
+		dev_err(dev, "fail to get bus clk\n");
+		return PTR_ERR(histb->bus_clk);
+	}
+
+	histb->utmi_clk = devm_clk_get(dev, "utmi");
+	if (IS_ERR(histb->utmi_clk)) {
+		dev_err(dev, "fail to get utmi clk\n");
+		return PTR_ERR(histb->utmi_clk);
+	}
+
+	histb->pipe_clk = devm_clk_get(dev, "pipe");
+	if (IS_ERR(histb->pipe_clk)) {
+		dev_err(dev, "fail to get pipe clk\n");
+		return PTR_ERR(histb->pipe_clk);
+	}
+
+	histb->suspend_clk = devm_clk_get(dev, "suspend");
+	if (IS_ERR(histb->suspend_clk)) {
+		dev_err(dev, "fail to get suspend clk\n");
+		return PTR_ERR(histb->suspend_clk);
+	}
+
+	return 0;
+}
+
+static int xhci_histb_host_enable(struct xhci_hcd_histb *histb)
+{
+	int ret;
+
+	ret = clk_prepare_enable(histb->bus_clk);
+	if (ret) {
+		dev_err(histb->dev, "failed to enable bus clk\n");
+		return ret;
+	}
+
+	ret = clk_prepare_enable(histb->utmi_clk);
+	if (ret) {
+		dev_err(histb->dev, "failed to enable utmi clk\n");
+		goto err_utmi_clk;
+	}
+
+	ret = clk_prepare_enable(histb->pipe_clk);
+	if (ret) {
+		dev_err(histb->dev, "failed to enable pipe clk\n");
+		goto err_pipe_clk;
+	}
+
+	ret = clk_prepare_enable(histb->suspend_clk);
+	if (ret) {
+		dev_err(histb->dev, "failed to enable suspend clk\n");
+		goto err_suspend_clk;
+	}
+
+	reset_control_deassert(histb->soft_reset);
+
+	return 0;
+
+err_suspend_clk:
+	clk_disable_unprepare(histb->pipe_clk);
+err_pipe_clk:
+	clk_disable_unprepare(histb->utmi_clk);
+err_utmi_clk:
+	clk_disable_unprepare(histb->bus_clk);
+
+	return ret;
+}
+
+static void xhci_histb_host_disable(struct xhci_hcd_histb *histb)
+{
+	reset_control_assert(histb->soft_reset);
+
+	clk_disable_unprepare(histb->suspend_clk);
+	clk_disable_unprepare(histb->pipe_clk);
+	clk_disable_unprepare(histb->utmi_clk);
+	clk_disable_unprepare(histb->bus_clk);
+}
+
+static void xhci_histb_quirks(struct device *dev, struct xhci_hcd *xhci)
+{
+	/*
+	 * As of now platform drivers don't provide MSI support so we ensure
+	 * here that the generic code does not try to make a pci_dev from our
+	 * dev struct in order to setup MSI
+	 */
+	xhci->quirks |= XHCI_PLAT;
+}
+
+/* called during probe() after chip reset completes */
+static int xhci_histb_setup(struct usb_hcd *hcd)
+{
+	struct xhci_hcd_histb *histb = hcd_to_histb(hcd);
+	int ret;
+
+	if (usb_hcd_is_primary_hcd(hcd)) {
+		ret = xhci_histb_config(histb);
+		if (ret)
+			return ret;
+	}
+
+	return xhci_gen_setup(hcd, xhci_histb_quirks);
+}
+
+static const struct xhci_driver_overrides xhci_histb_overrides __initconst = {
+	.reset = xhci_histb_setup,
+};
+
+static struct hc_driver __read_mostly xhci_histb_hc_driver;
+static int xhci_histb_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct xhci_hcd_histb *histb;
+	const struct hc_driver *driver;
+	struct usb_hcd *hcd;
+	struct xhci_hcd *xhci;
+	struct resource *res;
+	int irq;
+	int ret = -ENODEV;
+
+	if (usb_disabled())
+		return -ENODEV;
+
+	driver = &xhci_histb_hc_driver;
+	histb = devm_kzalloc(dev, sizeof(*histb), GFP_KERNEL);
+	if (!histb)
+		return -ENOMEM;
+
+	histb->dev = dev;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	histb->ctrl = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(histb->ctrl))
+		return PTR_ERR(histb->ctrl);
+
+	ret = xhci_histb_clks_get(histb);
+	if (ret)
+		return ret;
+
+	histb->soft_reset = devm_reset_control_get(dev, "soft");
+	if (IS_ERR(histb->soft_reset)) {
+		dev_err(dev, "failed to get soft reset\n");
+		return PTR_ERR(histb->soft_reset);
+	}
+
+	pm_runtime_enable(dev);
+	pm_runtime_get_sync(dev);
+	device_enable_async_suspend(dev);
+
+	/* Initialize dma_mask and coherent_dma_mask to 32-bits */
+	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
+	if (ret)
+		return ret;
+
+	hcd = usb_create_hcd(driver, dev, dev_name(dev));
+	if (!hcd) {
+		ret = -ENOMEM;
+		goto disable_pm;
+	}
+
+	hcd->regs = histb->ctrl;
+	hcd->rsrc_start = res->start;
+	hcd->rsrc_len = resource_size(res);
+
+	histb->hcd = hcd;
+	dev_set_drvdata(hcd->self.controller, histb);
+
+	ret = xhci_histb_host_enable(histb);
+	if (ret)
+		goto put_hcd;
+
+	xhci = hcd_to_xhci(hcd);
+
+	device_wakeup_enable(hcd->self.controller);
+
+	xhci->main_hcd = hcd;
+	xhci->shared_hcd = usb_create_shared_hcd(driver, dev, dev_name(dev),
+						 hcd);
+	if (!xhci->shared_hcd) {
+		ret = -ENOMEM;
+		goto disable_host;
+	}
+
+	if (device_property_read_bool(dev, "usb2-lpm-disable"))
+		xhci->quirks |= XHCI_HW_LPM_DISABLE;
+
+	if (device_property_read_bool(dev, "usb3-lpm-capable"))
+		xhci->quirks |= XHCI_LPM_SUPPORT;
+
+	if (device_property_read_bool(dev, "quirk-broken-port-ped"))
+		xhci->quirks |= XHCI_BROKEN_PORT_PED;
+
+	/* imod_interval is the interrupt moderation value in nanoseconds. */
+	xhci->imod_interval = 40000;
+	device_property_read_u32(dev, "imod-interval-ns",
+				 &xhci->imod_interval);
+
+	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
+	if (ret)
+		goto put_usb3_hcd;
+
+	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
+		xhci->shared_hcd->can_do_streams = 1;
+
+	ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
+	if (ret)
+		goto dealloc_usb2_hcd;
+
+	device_enable_async_suspend(dev);
+	pm_runtime_put_noidle(dev);
+
+	/*
+	 * Prevent runtime pm from being on as default, users should enable
+	 * runtime pm using power/control in sysfs.
+	 */
+	pm_runtime_forbid(dev);
+
+	return 0;
+
+dealloc_usb2_hcd:
+	usb_remove_hcd(hcd);
+put_usb3_hcd:
+	usb_put_hcd(xhci->shared_hcd);
+disable_host:
+	xhci_histb_host_disable(histb);
+put_hcd:
+	usb_put_hcd(hcd);
+disable_pm:
+	pm_runtime_put_sync(dev);
+	pm_runtime_disable(dev);
+
+	return ret;
+}
+
+static int xhci_histb_remove(struct platform_device *dev)
+{
+	struct xhci_hcd_histb *histb = platform_get_drvdata(dev);
+	struct usb_hcd *hcd = histb->hcd;
+	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
+
+	xhci->xhc_state |= XHCI_STATE_REMOVING;
+
+	usb_remove_hcd(xhci->shared_hcd);
+	device_wakeup_disable(&dev->dev);
+
+	usb_remove_hcd(hcd);
+	usb_put_hcd(xhci->shared_hcd);
+
+	xhci_histb_host_disable(histb);
+	usb_put_hcd(hcd);
+	pm_runtime_put_sync(&dev->dev);
+	pm_runtime_disable(&dev->dev);
+
+	return 0;
+}
+
+static int __maybe_unused xhci_histb_suspend(struct device *dev)
+{
+	struct xhci_hcd_histb *histb = dev_get_drvdata(dev);
+	struct usb_hcd *hcd = histb->hcd;
+	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
+	int ret;
+
+	ret = xhci_suspend(xhci, device_may_wakeup(dev));
+
+	if (!device_may_wakeup(dev))
+		xhci_histb_host_disable(histb);
+
+	return ret;
+}
+
+static int __maybe_unused xhci_histb_resume(struct device *dev)
+{
+	struct xhci_hcd_histb *histb = dev_get_drvdata(dev);
+	struct usb_hcd *hcd = histb->hcd;
+	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+	if (!device_may_wakeup(dev))
+		xhci_histb_host_enable(histb);
+
+	return xhci_resume(xhci, 0);
+}
+
+static const struct dev_pm_ops xhci_histb_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(xhci_histb_suspend, xhci_histb_resume)
+};
+#define DEV_PM_OPS (IS_ENABLED(CONFIG_PM) ? &xhci_histb_pm_ops : NULL)
+
+#ifdef CONFIG_OF
+static const struct of_device_id histb_xhci_of_match[] = {
+	{ .compatible = "hisilicon,hi3798cv200-xhci"},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, histb_xhci_of_match);
+#endif
+
+static struct platform_driver histb_xhci_driver = {
+	.probe	= xhci_histb_probe,
+	.remove	= xhci_histb_remove,
+	.driver	= {
+		.name = "xhci-histb",
+		.pm = DEV_PM_OPS,
+		.of_match_table = of_match_ptr(histb_xhci_of_match),
+	},
+};
+MODULE_ALIAS("platform:xhci-histb");
+
+static int __init xhci_histb_init(void)
+{
+	xhci_init_driver(&xhci_histb_hc_driver, &xhci_histb_overrides);
+	return platform_driver_register(&histb_xhci_driver);
+}
+module_init(xhci_histb_init);
+
+static void __exit xhci_histb_exit(void)
+{
+	platform_driver_unregister(&histb_xhci_driver);
+}
+module_exit(xhci_histb_exit);
+
+MODULE_DESCRIPTION("HiSilicon STB xHCI Host Controller Driver");
+MODULE_LICENSE("GPL v2");