Merge patch series "Implement ACPI on aarch64"

Patrick Rudolph <[email protected]> says:

Based on the existing work done by Simon Glass this series adds
support for booting aarch64 devices using ACPI only.
As first target QEMU SBSA support is added, which relies on ACPI
only to boot an OS. As secondary target the Raspberry Pi4 was used,
which is broadly available and allows easy testing of the proposed
solution.

The series is split into ACPI cleanups and code movements, adding
Arm specific ACPI tables and finally SoC and mainboard related
changes to boot a Linux on the QEMU SBSA and RPi4. Currently only the
mandatory ACPI tables are supported, allowing to boot into Linux
without errors.

The QEMU SBSA support is feature complete and provides the same
functionality as the EDK2 implementation.

The changes were tested on real hardware as well on QEMU v9.0:

qemu-system-aarch64 -machine sbsa-ref -nographic -cpu cortex-a57 \
                    -pflash secure-world.rom \
                    -pflash unsecure-world.rom

qemu-system-aarch64 -machine raspi4b -kernel u-boot.bin -cpu cortex-a72 \
-smp 4 -m 2G -drive file=raspbian.img,format=raw,index=0 \
-dtb bcm2711-rpi-4-b.dtb -nographic

Tested against FWTS V24.03.00.

Known issues:
- The QEMU rpi4 support is currently limited as it doesn't emulate PCI,
  USB or ethernet devices!
- The SMP bringup doesn't work on RPi4, but works in QEMU (Possibly
  cache related).
- PCI on RPI4 isn't working on real hardware since the pcie_brcmstb
  Linux kernel module doesn't support ACPI yet.

Link: https://lore.kernel.org/r/[email protected]

3 files changed, 84 insertions, 0 deletions

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 6e10b629a3c..bb5893d56db 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 792956e647a..301bb9fdee1 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 00000000000..355d4883176
--- /dev/null
+++ b/drivers/usb/host/xhci-generic.c
@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 9elements GmbH
+ *
+ * GENERIC USB HOST xHCI Controller
+ */
+#include <dm.h>
+#include <fdtdec.h>
+#include <log.h>
+#include <usb.h>
+#include <asm/io.h>
+#include <dm/device_compat.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;
+};
+
+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);
+
+	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) {
+		dev_dbg(dev, "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,
+};