[PATCH v2 16/28] drivers: usb: Add generic XHCI

[Tom Rini]

On Fri, Sep 06, 2024 at 09:22:18AM +0200, Patrick Rudolph wrote:

> Add support for the generic XHCI driver that contains no SoC
> specific code. It can be used on platforms that simply work out
> of the box, like on emulated platforms.
> 
> TEST: Booted on QEMU sbsa machine using the generic xhci driver.
> 
> Signed-off-by: Patrick Rudolph <patrick.rudolph at 9elements.com>
> Cc: Tom Rini <trini at konsulko.com>

Adding Marek..

> ---
>  drivers/usb/host/Kconfig        |  8 +++
>  drivers/usb/host/Makefile       |  1 +
>  drivers/usb/host/xhci-generic.c | 88 +++++++++++++++++++++++++++++++++
>  3 files changed, 97 insertions(+)
>  create mode 100644 drivers/usb/host/xhci-generic.c
> 
> diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
> index 6e10b629a3..bb5893d56d 100644
> --- a/drivers/usb/host/Kconfig
> +++ b/drivers/usb/host/Kconfig
> @@ -68,6 +68,14 @@ config USB_XHCI_MVEBU
>  	  SoCs, which includes Armada8K, Armada3700 and other Armada
>  	  family SoCs.
>  
> +config USB_XHCI_GENERIC
> +	bool "Generic SoC USB 3.0 support"
> +	depends on OF_CONTROL
> +	default n
> +	help
> +	  Choose this option to add support for USB 3.0 driver for SoCs
> +	  that do not need platform specific code, like on emulated targets.
> +
>  config USB_XHCI_OCTEON
>  	bool "Support for Marvell Octeon family on-chip xHCI USB controller"
>  	depends on ARCH_OCTEON
> diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
> index 8dad36f936..9e880195ec 100644
> --- a/drivers/usb/host/Makefile
> +++ b/drivers/usb/host/Makefile
> @@ -50,6 +50,7 @@ obj-$(CONFIG_USB_XHCI_EXYNOS) += xhci-exynos5.o
>  obj-$(CONFIG_USB_XHCI_FSL) += xhci-fsl.o
>  obj-$(CONFIG_USB_XHCI_MTK) += xhci-mtk.o
>  obj-$(CONFIG_USB_XHCI_MVEBU) += xhci-mvebu.o
> +obj-$(CONFIG_USB_XHCI_GENERIC) += xhci-generic.o
>  obj-$(CONFIG_USB_XHCI_OMAP) += xhci-omap.o
>  obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o
>  obj-$(CONFIG_USB_XHCI_RCAR) += xhci-rcar.o
> diff --git a/drivers/usb/host/xhci-generic.c b/drivers/usb/host/xhci-generic.c
> new file mode 100644
> index 0000000000..8c0341d0c4
> --- /dev/null
> +++ b/drivers/usb/host/xhci-generic.c
> @@ -0,0 +1,88 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Copyright (C) 2024 9elements GmbH
> + *
> + * GENERIC USB HOST xHCI Controller
> + */
> +
> +#include <asm/io.h>
> +#include <dm.h>
> +#include <fdtdec.h>
> +#include <log.h>
> +#include <usb.h>
> +
> +#include <usb/xhci.h>
> +
> +struct generic_xhci_plat {
> +	fdt_addr_t hcd_base;
> +};
> +
> +/**
> + * Contains pointers to register base addresses
> + * for the usb controller.
> + */
> +struct generic_xhci {
> +	struct xhci_ctrl ctrl;	/* Needs to come first in this struct! */
> +	struct usb_plat usb_plat;
> +	struct xhci_hccr *hcd;
> +};
> +
> +/*
> + * Dummy implementation that can be overwritten by a board
> + * specific function
> + */
> +__weak int board_xhci_enable(fdt_addr_t base)
> +{
> +	return 0;
> +}
> +
> +static int xhci_usb_probe(struct udevice *dev)
> +{
> +	struct generic_xhci_plat *plat = dev_get_plat(dev);
> +	struct generic_xhci *ctx = dev_get_priv(dev);
> +	struct xhci_hcor *hcor;
> +	int len;
> +
> +	ctx->hcd = (struct xhci_hccr *)phys_to_virt(plat->hcd_base);
> +	len = HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase));
> +	hcor = (struct xhci_hcor *)((uintptr_t)ctx->hcd + len);
> +
> +	/* Enable USB xHCI in board specific code */
> +	board_xhci_enable(devfdt_get_addr_index(dev, 1));
> +
> +	return xhci_register(dev, ctx->hcd, hcor);
> +}
> +
> +static int xhci_usb_of_to_plat(struct udevice *dev)
> +{
> +	struct generic_xhci_plat *plat = dev_get_plat(dev);
> +
> +	/*
> +	 * Get the base address for XHCI controller from the device node
> +	 */
> +	plat->hcd_base = dev_read_addr(dev);
> +	if (plat->hcd_base == FDT_ADDR_T_NONE) {
> +		debug("Can't get the XHCI register base address\n");
> +		return -ENXIO;
> +	}
> +
> +	return 0;
> +}
> +
> +static const struct udevice_id xhci_usb_ids[] = {
> +	{ .compatible = "generic-xhci" },
> +	{ }
> +};
> +
> +U_BOOT_DRIVER(usb_xhci) = {
> +	.name	= "xhci_generic",
> +	.id	= UCLASS_USB,
> +	.of_match = xhci_usb_ids,
> +	.of_to_plat = xhci_usb_of_to_plat,
> +	.probe = xhci_usb_probe,
> +	.remove = xhci_deregister,
> +	.ops	= &xhci_usb_ops,
> +	.plat_auto	= sizeof(struct generic_xhci_plat),
> +	.priv_auto	= sizeof(struct generic_xhci),
> +	.flags	= DM_FLAG_ALLOC_PRIV_DMA,
> +};
> -- 
> 2.45.2
> 

-- 
Tom
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 659 bytes
Desc: not available
URL: <https://lists.denx.de/pipermail/u-boot/attachments/20240906/6d78cde4/attachment.sig>