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

Andrew Lunn
2017-03-08T16:56:35Z

Hi Gregory

> - Add a new compatoble string for the Armada 3700 SoCs

compatible

>
> - 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 at free-electrons.com: - reword commit and comments
> - fix checkpatch warning]
> Signed-off-by: jinghua <jinghua@marvell.com>
> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
> ---
> .../devicetree/bindings/usb/ehci-orion.txt | 4 ++-
> drivers/usb/host/ehci-orion.c | 39 ++++++++++++++++++++++
> 2 files changed, 42 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/usb/ehci-orion.txt b/Documentation/devicetree/bindings/usb/ehci-orion.txt
> index 17c3bc858b86..9dfffc9dffec 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: could be one of the following

must, not could.

> + "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..cf778e166b90 100644
> --- a/drivers/usb/host/ehci-orion.c
> +++ b/drivers/usb/host/ehci-orion.c
> @@ -47,6 +47,21 @@
> #define USB_PHY_IVREF_CTRL 0x440
> #define USB_PHY_TST_GRP_CTRL 0x450
>
> +#define USB_SBUSCFG 0x90
> +#define USB_SBUSCFG_BAWR 0x6
> +#define USB_SBUSCFG_BARD 0x3
> +#define USB_SBUSCFG_AHBBRST 0x0

These three are all shifts. So i would suggest adding _SHIFT to the
end.

> +
> +/* BAWR = BARD = 3 : Align read/write bursts packets larger than 128 bytes */
> +#define USB_SBUSCFG_BAWR_ALIGN_128B 0x3
> +#define USB_SBUSCFG_BARD_ALIGN_128B 0x3
> +/* AHBBRST = 3 : Align AHB Burst to INCR16 (64 bytes) */
> +#define USB_SBUSCFG_AHBBRST_INCR16 0x3

You can then apply the shift here.

> +
> +#define USB_SBUSCFG_DEF_VAL ((USB_SBUSCFG_BAWR_ALIGN_128B << USB_SBUSCFG_BAWR) \
> + | (USB_SBUSCFG_BARD_ALIGN_128B << USB_SBUSCFG_BARD) \
> + | (USB_SBUSCFG_AHBBRST_INCR16 << USB_SBUSCFG_AHBBRST))

and this is then shorted.

Andrew