[U-Boot] [PATCH v2 07/10] usb: dwc3: Add phy interface for dwc3_uboot

[Kever Yang]

On 2019/11/19 下午4:26, Jagan Teki wrote:
> U-Boot has two different variants of dwc3 initializations,
> - with dm variant gadget, so the respective dm driver would
>    call the dwc3_init in core.
> - with non-dm variant gadget, so the usage board file would
>    call dwc3_uboot_init in core.
>
> The driver probe would handle all respective gadget properties
> including phy interface via phy_type property and then trigger
> dwc3_init for dm-variant gadgets.
>
> So, to support the phy interface for non-dm variant gadgets,
> the better option is dwc3_uboot_init since there is no
> dedicated controller for non-dm variant gadgets.
>
> This patch support for adding phy interface like 8/16-bit UTMI+
> code for dwc3_uboot.
>
> This change used Linux phy.h enum list, to make proper code
> compatibility.
>
> Cc: Marek Vasut <marex at denx.de>
> Tested-by: Levin Du <djw at t-chip.com.cn>
> Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>

Reviewed-by: Kever Yang <kever.yang at rock-chips.com>

Thanks,
- Kever
> ---
>   drivers/usb/dwc3/core.c | 27 +++++++++++++++++++++++++++
>   drivers/usb/dwc3/core.h | 12 ++++++++++++
>   include/dwc3-uboot.h    |  2 ++
>   include/linux/usb/phy.h | 19 +++++++++++++++++++
>   4 files changed, 60 insertions(+)
>   create mode 100644 include/linux/usb/phy.h
>
> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> index 23af60c98d..f779562de2 100644
> --- a/drivers/usb/dwc3/core.c
> +++ b/drivers/usb/dwc3/core.c
> @@ -613,6 +613,31 @@ static void dwc3_core_exit_mode(struct dwc3 *dwc)
>   	dwc3_gadget_run(dwc);
>   }
>   
> +static void dwc3_uboot_hsphy_mode(struct dwc3_device *dwc3_dev,
> +				  struct dwc3 *dwc)
> +{
> +	enum usb_phy_interface hsphy_mode = dwc3_dev->hsphy_mode;
> +	u32 reg;
> +
> +	/* Set dwc3 usb2 phy config */
> +	reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
> +	reg |= DWC3_GUSB2PHYCFG_PHYIF;
> +	reg &= ~DWC3_GUSB2PHYCFG_USBTRDTIM_MASK;
> +
> +	switch (hsphy_mode) {
> +	case USBPHY_INTERFACE_MODE_UTMI:
> +		reg |= DWC3_GUSB2PHYCFG_USBTRDTIM_8BIT;
> +		break;
> +	case USBPHY_INTERFACE_MODE_UTMIW:
> +		reg |= DWC3_GUSB2PHYCFG_USBTRDTIM_16BIT;
> +		break;
> +	default:
> +		break;
> +	}
> +
> +	dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
> +}
> +
>   #define DWC3_ALIGN_MASK		(16 - 1)
>   
>   /**
> @@ -721,6 +746,8 @@ int dwc3_uboot_init(struct dwc3_device *dwc3_dev)
>   		goto err0;
>   	}
>   
> +	dwc3_uboot_hsphy_mode(dwc3_dev, dwc);
> +
>   	ret = dwc3_event_buffers_setup(dwc);
>   	if (ret) {
>   		dev_err(dwc->dev, "failed to setup event buffers\n");
> diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
> index be9672266a..bff53e072b 100644
> --- a/drivers/usb/dwc3/core.h
> +++ b/drivers/usb/dwc3/core.h
> @@ -162,6 +162,18 @@
>   /* Global USB2 PHY Configuration Register */
>   #define DWC3_GUSB2PHYCFG_PHYSOFTRST	(1 << 31)
>   #define DWC3_GUSB2PHYCFG_SUSPHY		(1 << 6)
> +#define DWC3_GUSB2PHYCFG_PHYIF		BIT(3)
> +
> +/* Global USB2 PHY Configuration Mask */
> +#define DWC3_GUSB2PHYCFG_USBTRDTIM_MASK		(0xf << 10)
> +
> +/* Global USB2 PHY Configuration Offset */
> +#define DWC3_GUSB2PHYCFG_USBTRDTIM_OFFSET	10
> +
> +#define DWC3_GUSB2PHYCFG_USBTRDTIM_16BIT	(0x5 << \
> +		DWC3_GUSB2PHYCFG_USBTRDTIM_OFFSET)
> +#define DWC3_GUSB2PHYCFG_USBTRDTIM_8BIT		(0x9 << \
> +		DWC3_GUSB2PHYCFG_USBTRDTIM_OFFSET)
>   
>   /* Global USB3 PIPE Control Register */
>   #define DWC3_GUSB3PIPECTL_PHYSOFTRST	(1 << 31)
> diff --git a/include/dwc3-uboot.h b/include/dwc3-uboot.h
> index 9941cc37a3..3c9e204cf0 100644
> --- a/include/dwc3-uboot.h
> +++ b/include/dwc3-uboot.h
> @@ -10,10 +10,12 @@
>   #define __DWC3_UBOOT_H_
>   
>   #include <linux/usb/otg.h>
> +#include <linux/usb/phy.h>
>   
>   struct dwc3_device {
>   	unsigned long base;
>   	enum usb_dr_mode dr_mode;
> +	enum usb_phy_interface hsphy_mode;
>   	u32 maximum_speed;
>   	unsigned tx_fifo_resize:1;
>   	unsigned has_lpm_erratum;
> diff --git a/include/linux/usb/phy.h b/include/linux/usb/phy.h
> new file mode 100644
> index 0000000000..158ca9cd85
> --- /dev/null
> +++ b/include/linux/usb/phy.h
> @@ -0,0 +1,19 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * USB PHY defines
> + *
> + * These APIs may be used between USB controllers.  USB device drivers
> + * (for either host or peripheral roles) don't use these calls; they
> + * continue to use just usb_device and usb_gadget.
> + */
> +
> +#ifndef __LINUX_USB_PHY_H
> +#define __LINUX_USB_PHY_H
> +
> +enum usb_phy_interface {
> +	USBPHY_INTERFACE_MODE_UNKNOWN,
> +	USBPHY_INTERFACE_MODE_UTMI,
> +	USBPHY_INTERFACE_MODE_UTMIW,
> +};
> +
> +#endif /* __LINUX_USB_PHY_H */