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[PATCH v4 1/3] usb: orion-echi: Add support for the Armada 3700

Started byGregory CLEMENT <gregory.clement@free-electrons.com>
First post2017-03-09 19:00 +0100
Last post2017-03-10 16:00 +0100
Articles 4 — 3 participants

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  [PATCH v4 1/3] usb: orion-echi: Add support for the Armada 3700 Gregory CLEMENT <gregory.clement@free-electrons.com> - 2017-03-09 19:00 +0100
    Re: [PATCH v4 1/3] usb: orion-echi: Add support for the Armada 3700 Alan Stern <stern@rowland.harvard.edu> - 2017-03-09 19:20 +0100
      Re: [PATCH v4 1/3] usb: orion-echi: Add support for the Armada 3700 Gregory CLEMENT <gregory.clement@free-electrons.com> - 2017-03-10 11:00 +0100
        Re: [PATCH v4 1/3] usb: orion-echi: Add support for the Armada 3700 Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-03-10 16:00 +0100

#1596263 — [PATCH v4 1/3] usb: orion-echi: Add support for the Armada 3700

FromGregory CLEMENT <gregory.clement@free-electrons.com>
Date2017-03-09 19:00 +0100
Subject[PATCH v4 1/3] usb: orion-echi: Add support for the Armada 3700
Message-ID<tjaw2-8vb-5@gated-at.bofh.it>
From: Hua Jing <jinghua@marvell.com>

- Add a new compatible string for the Armada 3700 SoCs

- add sbuscfg support for orion usb controller driver. For the SoCs
  without hlock, need to program BAWR/BARD/AHBBRST fields in the sbuscfg
  register to guarantee the AHB master's burst would not overrun or
  underrun the FIFO.

- the sbuscfg register has to be set after the usb controller reset,
  otherwise the value would be overridden to 0. In order to do this, the
  reset callback is registered.

[gregory.clement@free-electrons.com: - reword commit and comments
				     - fix error path in ehci_orion_drv_reset()
				     - fix checkpatch warning]
Signed-off-by: Hua Jing <jinghua@marvell.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
---
 .../devicetree/bindings/usb/ehci-orion.txt         |  4 ++-
 drivers/usb/host/ehci-orion.c                      | 36 ++++++++++++++++++++++
 2 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/usb/ehci-orion.txt b/Documentation/devicetree/bindings/usb/ehci-orion.txt
index 17c3bc858b86..2855bae79fda 100644
--- a/Documentation/devicetree/bindings/usb/ehci-orion.txt
+++ b/Documentation/devicetree/bindings/usb/ehci-orion.txt
@@ -1,7 +1,9 @@
 * EHCI controller, Orion Marvell variants
 
 Required properties:
-- compatible: must be "marvell,orion-ehci"
+- compatible: must be one of the following
+	"marvell,orion-ehci"
+	"marvell,armada-3700-ehci"
 - reg: physical base address of the controller and length of memory mapped
   region.
 - interrupts: The EHCI interrupt
diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
index ee8d5faa0194..1aec87ec68df 100644
--- a/drivers/usb/host/ehci-orion.c
+++ b/drivers/usb/host/ehci-orion.c
@@ -47,6 +47,18 @@
 #define USB_PHY_IVREF_CTRL	0x440
 #define USB_PHY_TST_GRP_CTRL	0x450
 
+#define USB_SBUSCFG		0x90
+
+/* BAWR = BARD = 3 : Align read/write bursts packets larger than 128 bytes */
+#define USB_SBUSCFG_BAWR_ALIGN_128B	(0x3 << 6)
+#define USB_SBUSCFG_BARD_ALIGN_128B	(0x3 << 3)
+/* AHBBRST = 3	   : Align AHB Burst to INCR16 (64 bytes) */
+#define USB_SBUSCFG_AHBBRST_INCR16	(0x3 << 0)
+
+#define USB_SBUSCFG_DEF_VAL (USB_SBUSCFG_BAWR_ALIGN_128B	\
+			     | USB_SBUSCFG_BARD_ALIGN_128B	\
+			     | USB_SBUSCFG_AHBBRST_INCR16)
+
 #define DRIVER_DESC "EHCI orion driver"
 
 #define hcd_to_orion_priv(h) ((struct orion_ehci_hcd *)hcd_to_ehci(h)->priv)
@@ -151,8 +163,31 @@ ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
 	}
 }
 
+static int ehci_orion_drv_reset(struct usb_hcd *hcd)
+{
+	struct device *dev = hcd->self.controller;
+	int ret;
+
+	ret = ehci_setup(hcd);
+	if (ret)
+		return ret;
+
+	/*
+	 * For SoC without hlock, need to program sbuscfg value to guarantee
+	 * AHB master's burst would not overrun or underrun FIFO.
+	 *
+	 * sbuscfg reg has to be set after usb controller reset, otherwise
+	 * the value would be override to 0.
+	 */
+	if (of_device_is_compatible(dev->of_node, "marvell,armada-3700-ehci"))
+		wrl(USB_SBUSCFG, USB_SBUSCFG_DEF_VAL);
+
+	return ret;
+}
+
 static const struct ehci_driver_overrides orion_overrides __initconst = {
 	.extra_priv_size =	sizeof(struct orion_ehci_hcd),
+	.reset = ehci_orion_drv_reset,
 };
 
 static int ehci_orion_drv_probe(struct platform_device *pdev)
@@ -310,6 +345,7 @@ static int ehci_orion_drv_remove(struct platform_device *pdev)
 
 static const struct of_device_id ehci_orion_dt_ids[] = {
 	{ .compatible = "marvell,orion-ehci", },
+	{ .compatible = "marvell,armada-3700-ehci", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, ehci_orion_dt_ids);
-- 
2.11.0

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#1596283

FromAlan Stern <stern@rowland.harvard.edu>
Date2017-03-09 19:20 +0100
Message-ID<tjaPo-rT-5@gated-at.bofh.it>
In reply to#1596263
On Thu, 9 Mar 2017, Gregory CLEMENT wrote:

> From: Hua Jing <jinghua@marvell.com>
> 
> - Add a new compatible string for the Armada 3700 SoCs
> 
> - add sbuscfg support for orion usb controller driver. For the SoCs
>   without hlock, need to program BAWR/BARD/AHBBRST fields in the sbuscfg
>   register to guarantee the AHB master's burst would not overrun or
>   underrun the FIFO.
> 
> - the sbuscfg register has to be set after the usb controller reset,
>   otherwise the value would be overridden to 0. In order to do this, the
>   reset callback is registered.
> 
> [gregory.clement@free-electrons.com: - reword commit and comments
> 				     - fix error path in ehci_orion_drv_reset()
> 				     - fix checkpatch warning]
> Signed-off-by: Hua Jing <jinghua@marvell.com>
> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>

Acked-by: Alan Stern <stern@rowland.harvard.edu>

> ---
>  .../devicetree/bindings/usb/ehci-orion.txt         |  4 ++-
>  drivers/usb/host/ehci-orion.c                      | 36 ++++++++++++++++++++++
>  2 files changed, 39 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/usb/ehci-orion.txt b/Documentation/devicetree/bindings/usb/ehci-orion.txt
> index 17c3bc858b86..2855bae79fda 100644
> --- a/Documentation/devicetree/bindings/usb/ehci-orion.txt
> +++ b/Documentation/devicetree/bindings/usb/ehci-orion.txt
> @@ -1,7 +1,9 @@
>  * EHCI controller, Orion Marvell variants
>  
>  Required properties:
> -- compatible: must be "marvell,orion-ehci"
> +- compatible: must be one of the following
> +	"marvell,orion-ehci"
> +	"marvell,armada-3700-ehci"
>  - reg: physical base address of the controller and length of memory mapped
>    region.
>  - interrupts: The EHCI interrupt
> diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
> index ee8d5faa0194..1aec87ec68df 100644
> --- a/drivers/usb/host/ehci-orion.c
> +++ b/drivers/usb/host/ehci-orion.c
> @@ -47,6 +47,18 @@
>  #define USB_PHY_IVREF_CTRL	0x440
>  #define USB_PHY_TST_GRP_CTRL	0x450
>  
> +#define USB_SBUSCFG		0x90
> +
> +/* BAWR = BARD = 3 : Align read/write bursts packets larger than 128 bytes */
> +#define USB_SBUSCFG_BAWR_ALIGN_128B	(0x3 << 6)
> +#define USB_SBUSCFG_BARD_ALIGN_128B	(0x3 << 3)
> +/* AHBBRST = 3	   : Align AHB Burst to INCR16 (64 bytes) */
> +#define USB_SBUSCFG_AHBBRST_INCR16	(0x3 << 0)
> +
> +#define USB_SBUSCFG_DEF_VAL (USB_SBUSCFG_BAWR_ALIGN_128B	\
> +			     | USB_SBUSCFG_BARD_ALIGN_128B	\
> +			     | USB_SBUSCFG_AHBBRST_INCR16)
> +
>  #define DRIVER_DESC "EHCI orion driver"
>  
>  #define hcd_to_orion_priv(h) ((struct orion_ehci_hcd *)hcd_to_ehci(h)->priv)
> @@ -151,8 +163,31 @@ ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
>  	}
>  }
>  
> +static int ehci_orion_drv_reset(struct usb_hcd *hcd)
> +{
> +	struct device *dev = hcd->self.controller;
> +	int ret;
> +
> +	ret = ehci_setup(hcd);
> +	if (ret)
> +		return ret;
> +
> +	/*
> +	 * For SoC without hlock, need to program sbuscfg value to guarantee
> +	 * AHB master's burst would not overrun or underrun FIFO.
> +	 *
> +	 * sbuscfg reg has to be set after usb controller reset, otherwise
> +	 * the value would be override to 0.
> +	 */
> +	if (of_device_is_compatible(dev->of_node, "marvell,armada-3700-ehci"))
> +		wrl(USB_SBUSCFG, USB_SBUSCFG_DEF_VAL);
> +
> +	return ret;
> +}
> +
>  static const struct ehci_driver_overrides orion_overrides __initconst = {
>  	.extra_priv_size =	sizeof(struct orion_ehci_hcd),
> +	.reset = ehci_orion_drv_reset,
>  };
>  
>  static int ehci_orion_drv_probe(struct platform_device *pdev)
> @@ -310,6 +345,7 @@ static int ehci_orion_drv_remove(struct platform_device *pdev)
>  
>  static const struct of_device_id ehci_orion_dt_ids[] = {
>  	{ .compatible = "marvell,orion-ehci", },
> +	{ .compatible = "marvell,armada-3700-ehci", },
>  	{},
>  };
>  MODULE_DEVICE_TABLE(of, ehci_orion_dt_ids);
>

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#1596943

FromGregory CLEMENT <gregory.clement@free-electrons.com>
Date2017-03-10 11:00 +0100
Message-ID<tjpv4-27X-23@gated-at.bofh.it>
In reply to#1596283
Hi Alan,
 
 On jeu., mars 09 2017, Alan Stern <stern@rowland.harvard.edu> wrote:

> On Thu, 9 Mar 2017, Gregory CLEMENT wrote:
>
>> From: Hua Jing <jinghua@marvell.com>
>> 
>> - Add a new compatible string for the Armada 3700 SoCs
>> 
>> - add sbuscfg support for orion usb controller driver. For the SoCs
>>   without hlock, need to program BAWR/BARD/AHBBRST fields in the sbuscfg
>>   register to guarantee the AHB master's burst would not overrun or
>>   underrun the FIFO.
>> 
>> - the sbuscfg register has to be set after the usb controller reset,
>>   otherwise the value would be overridden to 0. In order to do this, the
>>   reset callback is registered.
>> 
>> [gregory.clement@free-electrons.com: - reword commit and comments
>> 				     - fix error path in ehci_orion_drv_reset()
>> 				     - fix checkpatch warning]
>> Signed-off-by: Hua Jing <jinghua@marvell.com>
>> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
>> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
>
> Acked-by: Alan Stern <stern@rowland.harvard.edu>

Thanks!

And what about the second patch "usb: host: Allow to build ehci orion
with mvebu SoCs " ?

I don't remember what is the workflow for the usb subsystem. Will you do
a pull request to GKH? Or maybe he collects himself the patch once you
give your acked-by.

I will take care of the third patch and apply on the mvebu/dt64 branch
now that you agree the extension for the driver.

Gregory


>
>> ---
>>  .../devicetree/bindings/usb/ehci-orion.txt         |  4 ++-
>>  drivers/usb/host/ehci-orion.c                      | 36 ++++++++++++++++++++++
>>  2 files changed, 39 insertions(+), 1 deletion(-)
>> 
>> diff --git a/Documentation/devicetree/bindings/usb/ehci-orion.txt b/Documentation/devicetree/bindings/usb/ehci-orion.txt
>> index 17c3bc858b86..2855bae79fda 100644
>> --- a/Documentation/devicetree/bindings/usb/ehci-orion.txt
>> +++ b/Documentation/devicetree/bindings/usb/ehci-orion.txt
>> @@ -1,7 +1,9 @@
>>  * EHCI controller, Orion Marvell variants
>>  
>>  Required properties:
>> -- compatible: must be "marvell,orion-ehci"
>> +- compatible: must be one of the following
>> +	"marvell,orion-ehci"
>> +	"marvell,armada-3700-ehci"
>>  - reg: physical base address of the controller and length of memory mapped
>>    region.
>>  - interrupts: The EHCI interrupt
>> diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
>> index ee8d5faa0194..1aec87ec68df 100644
>> --- a/drivers/usb/host/ehci-orion.c
>> +++ b/drivers/usb/host/ehci-orion.c
>> @@ -47,6 +47,18 @@
>>  #define USB_PHY_IVREF_CTRL	0x440
>>  #define USB_PHY_TST_GRP_CTRL	0x450
>>  
>> +#define USB_SBUSCFG		0x90
>> +
>> +/* BAWR = BARD = 3 : Align read/write bursts packets larger than 128 bytes */
>> +#define USB_SBUSCFG_BAWR_ALIGN_128B	(0x3 << 6)
>> +#define USB_SBUSCFG_BARD_ALIGN_128B	(0x3 << 3)
>> +/* AHBBRST = 3	   : Align AHB Burst to INCR16 (64 bytes) */
>> +#define USB_SBUSCFG_AHBBRST_INCR16	(0x3 << 0)
>> +
>> +#define USB_SBUSCFG_DEF_VAL (USB_SBUSCFG_BAWR_ALIGN_128B	\
>> +			     | USB_SBUSCFG_BARD_ALIGN_128B	\
>> +			     | USB_SBUSCFG_AHBBRST_INCR16)
>> +
>>  #define DRIVER_DESC "EHCI orion driver"
>>  
>>  #define hcd_to_orion_priv(h) ((struct orion_ehci_hcd *)hcd_to_ehci(h)->priv)
>> @@ -151,8 +163,31 @@ ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
>>  	}
>>  }
>>  
>> +static int ehci_orion_drv_reset(struct usb_hcd *hcd)
>> +{
>> +	struct device *dev = hcd->self.controller;
>> +	int ret;
>> +
>> +	ret = ehci_setup(hcd);
>> +	if (ret)
>> +		return ret;
>> +
>> +	/*
>> +	 * For SoC without hlock, need to program sbuscfg value to guarantee
>> +	 * AHB master's burst would not overrun or underrun FIFO.
>> +	 *
>> +	 * sbuscfg reg has to be set after usb controller reset, otherwise
>> +	 * the value would be override to 0.
>> +	 */
>> +	if (of_device_is_compatible(dev->of_node, "marvell,armada-3700-ehci"))
>> +		wrl(USB_SBUSCFG, USB_SBUSCFG_DEF_VAL);
>> +
>> +	return ret;
>> +}
>> +
>>  static const struct ehci_driver_overrides orion_overrides __initconst = {
>>  	.extra_priv_size =	sizeof(struct orion_ehci_hcd),
>> +	.reset = ehci_orion_drv_reset,
>>  };
>>  
>>  static int ehci_orion_drv_probe(struct platform_device *pdev)
>> @@ -310,6 +345,7 @@ static int ehci_orion_drv_remove(struct platform_device *pdev)
>>  
>>  static const struct of_device_id ehci_orion_dt_ids[] = {
>>  	{ .compatible = "marvell,orion-ehci", },
>> +	{ .compatible = "marvell,armada-3700-ehci", },
>>  	{},
>>  };
>>  MODULE_DEVICE_TABLE(of, ehci_orion_dt_ids);
>> 
>

-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

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#1597904

FromGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Date2017-03-10 16:00 +0100
Message-ID<tjubo-5v7-19@gated-at.bofh.it>
In reply to#1596943
On Fri, Mar 10, 2017 at 10:55:23AM +0100, Gregory CLEMENT wrote:
> Hi Alan,
>  
>  On jeu., mars 09 2017, Alan Stern <stern@rowland.harvard.edu> wrote:
> 
> > On Thu, 9 Mar 2017, Gregory CLEMENT wrote:
> >
> >> From: Hua Jing <jinghua@marvell.com>
> >> 
> >> - Add a new compatible string for the Armada 3700 SoCs
> >> 
> >> - add sbuscfg support for orion usb controller driver. For the SoCs
> >>   without hlock, need to program BAWR/BARD/AHBBRST fields in the sbuscfg
> >>   register to guarantee the AHB master's burst would not overrun or
> >>   underrun the FIFO.
> >> 
> >> - the sbuscfg register has to be set after the usb controller reset,
> >>   otherwise the value would be overridden to 0. In order to do this, the
> >>   reset callback is registered.
> >> 
> >> [gregory.clement@free-electrons.com: - reword commit and comments
> >> 				     - fix error path in ehci_orion_drv_reset()
> >> 				     - fix checkpatch warning]
> >> Signed-off-by: Hua Jing <jinghua@marvell.com>
> >> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
> >> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
> >
> > Acked-by: Alan Stern <stern@rowland.harvard.edu>
> 
> Thanks!
> 
> And what about the second patch "usb: host: Allow to build ehci orion
> with mvebu SoCs " ?
> 
> I don't remember what is the workflow for the usb subsystem. Will you do
> a pull request to GKH? Or maybe he collects himself the patch once you
> give your acked-by.
> 
> I will take care of the third patch and apply on the mvebu/dt64 branch
> now that you agree the extension for the driver.

I'll take all of these once they look "good enough".  Give me a week or
so to get to all of the pending patches in my queue...

thanks,

greg k-h

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