1 files changed, 98 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/usb/host/xhci-brcm.c b/roms/u-boot/drivers/usb/host/xhci-brcm.c
new file mode 100644
index 000000000..27c4bbfcb
--- /dev/null
+++ b/roms/u-boot/drivers/usb/host/xhci-brcm.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Broadcom.
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <usb.h>
+#include <asm/io.h>
+#include <usb/xhci.h>
+
+#define DRD2U3H_XHC_REGS_AXIWRA	0xC08
+#define DRD2U3H_XHC_REGS_AXIRDA	0xC0C
+
+#define USBAXI_CACHE		0xF
+#define USBAXI_PROT		0x8
+#define USBAXI_SA_MASK		0x1FF
+#define USBAXI_UA_MASK		(0x1FF << 16)
+#define USBAXI_SA_VAL		((USBAXI_CACHE << 4) | USBAXI_PROT)
+#define USBAXI_UA_VAL		(USBAXI_SA_VAL << 16)
+#define USBAXI_SA_UA_MASK	(USBAXI_UA_MASK | USBAXI_SA_MASK)
+#define USBAXI_SA_UA_VAL	(USBAXI_UA_VAL | USBAXI_SA_VAL)
+
+struct brcm_xhci_plat {
+	unsigned int arcache;
+	unsigned int awcache;
+	void __iomem *hc_base;
+};
+
+static int xhci_brcm_probe(struct udevice *dev)
+{
+	struct brcm_xhci_plat *plat = dev_get_plat(dev);
+	struct xhci_hcor *hcor;
+	struct xhci_hccr *hcd;
+	int len, ret = 0;
+
+	if (!plat) {
+		dev_err(dev, "Can't get xHCI Plat data\n");
+		return -ENOMEM;
+	}
+
+	hcd = dev_read_addr_ptr(dev);
+	if (!hcd) {
+		dev_err(dev, "Can't get the xHCI register base address\n");
+		return -ENXIO;
+	}
+
+	plat->hc_base = hcd;
+	len = HC_LENGTH(xhci_readl(&hcd->cr_capbase));
+	hcor = (struct xhci_hcor *)(plat->hc_base + len);
+
+	/* Save the default values of AXI read and write attributes */
+	plat->awcache = readl(plat->hc_base + DRD2U3H_XHC_REGS_AXIWRA);
+	plat->arcache = readl(plat->hc_base + DRD2U3H_XHC_REGS_AXIRDA);
+
+	/* Enable AXI write attributes */
+	clrsetbits_le32(plat->hc_base + DRD2U3H_XHC_REGS_AXIWRA,
+			USBAXI_SA_UA_MASK, USBAXI_SA_UA_VAL);
+
+	/* Enable AXI read attributes */
+	clrsetbits_le32(plat->hc_base + DRD2U3H_XHC_REGS_AXIRDA,
+			USBAXI_SA_UA_MASK, USBAXI_SA_UA_VAL);
+
+	ret = xhci_register(dev, hcd, hcor);
+	if (ret)
+		dev_err(dev, "Failed to register xHCI\n");
+
+	return ret;
+}
+
+static int xhci_brcm_deregister(struct udevice *dev)
+{
+	struct brcm_xhci_plat *plat = dev_get_plat(dev);
+
+	/* Restore the default values for AXI read and write attributes */
+	writel(plat->awcache, plat->hc_base + DRD2U3H_XHC_REGS_AXIWRA);
+	writel(plat->arcache, plat->hc_base + DRD2U3H_XHC_REGS_AXIRDA);
+
+	return xhci_deregister(dev);
+}
+
+static const struct udevice_id xhci_brcm_ids[] = {
+	{ .compatible = "brcm,generic-xhci" },
+	{ }
+};
+
+U_BOOT_DRIVER(usb_xhci) = {
+	.name				= "xhci_brcm",
+	.id				= UCLASS_USB,
+	.probe				= xhci_brcm_probe,
+	.remove				= xhci_brcm_deregister,
+	.ops				= &xhci_usb_ops,
+	.of_match			= xhci_brcm_ids,
+	.plat_auto	= sizeof(struct brcm_xhci_plat),
+	.priv_auto		= sizeof(struct xhci_ctrl),
+	.flags				= DM_FLAG_ALLOC_PRIV_DMA,
+};