[U-Boot] [PATCH] usb: dwc3: add UniPhier specific glue layer

[Marek Vasut]

On 09/28/2017 03:01 PM, Masahiro Yamada wrote:
> Add UniPhier platform specific glue layer to support USB3 Host mode
> on Synopsys DWC3 IP.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
> Reviewed-by: Marek Vasut <marex at denx.de>

[...]

> +static int uniphier_pro4_dwc3_init(void __iomem *regs)
> +{
> +	u32 tmp;
> +
> +	tmp = readl(regs + UNIPHIER_PRO4_DWC3_RESET);
> +	tmp &= ~UNIPHIER_PRO4_DWC3_RESET_PHY_SS;
> +	tmp |= UNIPHIER_PRO4_DWC3_RESET_XIOMMU | UNIPHIER_PRO4_DWC3_RESET_XLINK;
> +	writel(tmp, regs + UNIPHIER_PRO4_DWC3_RESET);

Do I even want to nag you about clrsetbits_le32() or not ?
What do you think?

> +	return 0;
> +}
> +
> +static int uniphier_pro5_dwc3_init(void __iomem *regs)
> +{
> +	u32 tmp;
> +
> +	tmp = readl(regs + UNIPHIER_PRO5_DWC3_RESET);
> +	tmp &= ~(UNIPHIER_PRO5_DWC3_RESET_PHY_S1 |
> +		 UNIPHIER_PRO5_DWC3_RESET_PHY_S0);
> +	tmp |= UNIPHIER_PRO5_DWC3_RESET_XLINK | UNIPHIER_PRO5_DWC3_RESET_XIOMMU;
> +	writel(tmp, regs + UNIPHIER_PRO5_DWC3_RESET);
> +
> +	return 0;
> +}
> +
> +static int uniphier_pxs2_dwc3_init(void __iomem *regs)
> +{
> +	u32 tmp;
> +
> +	tmp = readl(regs + UNIPHIER_PXS2_DWC3_RESET);
> +	tmp |= UNIPHIER_PXS2_DWC3_RESET_XLINK;
> +	writel(tmp, regs + UNIPHIER_PXS2_DWC3_RESET);
> +
> +	return 0;
> +}
> +
> +static int uniphier_dwc3_probe(struct udevice *dev)
> +{
> +	fdt_addr_t base;
> +	void __iomem *regs;
> +	int (*init)(void __iomem *regs);
> +	int ret;
> +
> +	base = devfdt_get_addr(dev);
> +	if (base == FDT_ADDR_T_NONE)
> +		return -EINVAL;
> +
> +	regs = ioremap(base, SZ_32K);
> +	if (!regs)
> +		return -ENOMEM;
> +
> +	init = (typeof(init))dev_get_driver_data(dev);
> +	ret = init(regs);
> +	if (ret)
> +		dev_err(dev, "failed to init glue layer\n");
> +
> +	iounmap(regs);
> +
> +	return ret;
> +}
> +
> +static const struct udevice_id uniphier_dwc3_match[] = {
> +	{
> +		.compatible = "socionext,uniphier-pro4-dwc3",
> +		.data = (ulong)uniphier_pro4_dwc3_init,
> +	},
> +	{
> +		.compatible = "socionext,uniphier-pro5-dwc3",
> +		.data = (ulong)uniphier_pro5_dwc3_init,
> +	},
> +	{
> +		.compatible = "socionext,uniphier-pxs2-dwc3",
> +		.data = (ulong)uniphier_pxs2_dwc3_init,
> +	},
> +	{
> +		.compatible = "socionext,uniphier-ld20-dwc3",
> +		.data = (ulong)uniphier_pxs2_dwc3_init,
> +	},
> +	{
> +		.compatible = "socionext,uniphier-pxs3-dwc3",
> +		.data = (ulong)uniphier_pxs2_dwc3_init,
> +	},
> +	{ /* sentinel */ }
> +};
> +
> +U_BOOT_DRIVER(usb_xhci) = {
> +	.name = "uniphier-dwc3",
> +	.id = UCLASS_SIMPLE_BUS,
> +	.of_match = uniphier_dwc3_match,
> +	.probe = uniphier_dwc3_probe,
> +};
> 


-- 
Best regards,
Marek Vasut