Merge git://git.denx.de/u-boot-usb

33 files changed, 112 insertions, 51 deletions

diff --git a/common/usb_storage.c b/common/usb_storage.c
index df0b0573087..a57570b73f3 100644
--- a/common/usb_storage.c
+++ b/common/usb_storage.c
@@ -98,19 +98,9 @@ struct us_data {
 	struct scsi_cmd	*srb;			/* current srb */
 	trans_reset	transport_reset;	/* reset routine */
 	trans_cmnd	transport;		/* transport routine */
+	unsigned short	max_xfer_blk;		/* maximum transfer blocks */
 };
 
-#ifdef CONFIG_USB_EHCI_HCD
-/*
- * The U-Boot EHCI driver can handle any transfer length as long as there is
- * enough free heap space left, but the SCSI READ(10) and WRITE(10) commands are
- * limited to 65535 blocks.
- */
-#define USB_MAX_XFER_BLK	65535
-#else
-#define USB_MAX_XFER_BLK	20
-#endif
-
 #ifndef CONFIG_BLK
 static struct us_data usb_stor[USB_MAX_STOR_DEV];
 #endif
@@ -949,6 +939,38 @@ do_retry:
 	return USB_STOR_TRANSPORT_FAILED;
 }
 
+static void usb_stor_set_max_xfer_blk(struct usb_device *udev,
+				      struct us_data *us)
+{
+	unsigned short blk;
+	size_t __maybe_unused size;
+	int __maybe_unused ret;
+
+#ifndef CONFIG_DM_USB
+#ifdef CONFIG_USB_EHCI_HCD
+	/*
+	 * The U-Boot EHCI driver can handle any transfer length as long as
+	 * there is enough free heap space left, but the SCSI READ(10) and
+	 * WRITE(10) commands are limited to 65535 blocks.
+	 */
+	blk = USHRT_MAX;
+#else
+	blk = 20;
+#endif
+#else
+	ret = usb_get_max_xfer_size(udev, (size_t *)&size);
+	if (ret < 0) {
+		/* unimplemented, let's use default 20 */
+		blk = 20;
+	} else {
+		if (size > USHRT_MAX * 512)
+			blk = USHRT_MAX;
+		blk = size / 512;
+	}
+#endif
+
+	us->max_xfer_blk = blk;
+}
 
 static int usb_inquiry(struct scsi_cmd *srb, struct us_data *ss)
 {
@@ -1150,12 +1172,12 @@ static unsigned long usb_stor_read(struct blk_desc *block_dev, lbaint_t blknr,
 		/* XXX need some comment here */
 		retry = 2;
 		srb->pdata = (unsigned char *)buf_addr;
-		if (blks > USB_MAX_XFER_BLK)
-			smallblks = USB_MAX_XFER_BLK;
+		if (blks > ss->max_xfer_blk)
+			smallblks = ss->max_xfer_blk;
 		else
 			smallblks = (unsigned short) blks;
 retry_it:
-		if (smallblks == USB_MAX_XFER_BLK)
+		if (smallblks == ss->max_xfer_blk)
 			usb_show_progress();
 		srb->datalen = block_dev->blksz * smallblks;
 		srb->pdata = (unsigned char *)buf_addr;
@@ -1178,7 +1200,7 @@ retry_it:
 	      start, smallblks, buf_addr);
 
 	usb_disable_asynch(0); /* asynch transfer allowed */
-	if (blkcnt >= USB_MAX_XFER_BLK)
+	if (blkcnt >= ss->max_xfer_blk)
 		debug("\n");
 	return blkcnt;
 }
@@ -1236,12 +1258,12 @@ static unsigned long usb_stor_write(struct blk_desc *block_dev, lbaint_t blknr,
 		 */
 		retry = 2;
 		srb->pdata = (unsigned char *)buf_addr;
-		if (blks > USB_MAX_XFER_BLK)
-			smallblks = USB_MAX_XFER_BLK;
+		if (blks > ss->max_xfer_blk)
+			smallblks = ss->max_xfer_blk;
 		else
 			smallblks = (unsigned short) blks;
 retry_it:
-		if (smallblks == USB_MAX_XFER_BLK)
+		if (smallblks == ss->max_xfer_blk)
 			usb_show_progress();
 		srb->datalen = block_dev->blksz * smallblks;
 		srb->pdata = (unsigned char *)buf_addr;
@@ -1263,7 +1285,7 @@ retry_it:
 	      PRIxPTR "\n", start, smallblks, buf_addr);
 
 	usb_disable_asynch(0); /* asynch transfer allowed */
-	if (blkcnt >= USB_MAX_XFER_BLK)
+	if (blkcnt >= ss->max_xfer_blk)
 		debug("\n");
 	return blkcnt;
 
@@ -1384,6 +1406,10 @@ int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
 		ss->irqmaxp = usb_maxpacket(dev, ss->irqpipe);
 		dev->irq_handle = usb_stor_irq;
 	}
+
+	/* Set the maximum transfer size per host controller setting */
+	usb_stor_set_max_xfer_blk(dev, ss);
+
 	dev->privptr = (void *)ss;
 	return 1;
 }
diff --git a/configs/Cyrus_P5020_defconfig b/configs/Cyrus_P5020_defconfig
index 82da8543864..37f78a4811b 100644
--- a/configs/Cyrus_P5020_defconfig
+++ b/configs/Cyrus_P5020_defconfig
@@ -34,5 +34,4 @@ CONFIG_FSL_ESPI=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_OF_LIBFDT=y
diff --git a/configs/Cyrus_P5040_defconfig b/configs/Cyrus_P5040_defconfig
index 0fc9a075489..d33b514ee0e 100644
--- a/configs/Cyrus_P5040_defconfig
+++ b/configs/Cyrus_P5040_defconfig
@@ -34,5 +34,4 @@ CONFIG_FSL_ESPI=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_OF_LIBFDT=y
diff --git a/configs/MPC8610HPCD_defconfig b/configs/MPC8610HPCD_defconfig
index fde837c0115..c71d5b18e1c 100644
--- a/configs/MPC8610HPCD_defconfig
+++ b/configs/MPC8610HPCD_defconfig
@@ -22,5 +22,4 @@ CONFIG_SCSI=y
 CONFIG_SYS_NS16550=y
 CONFIG_USB=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_OF_LIBFDT=y
diff --git a/configs/MPC8641HPCN_36BIT_defconfig b/configs/MPC8641HPCN_36BIT_defconfig
index 7318e723a8e..9949e8b6994 100644
--- a/configs/MPC8641HPCN_36BIT_defconfig
+++ b/configs/MPC8641HPCN_36BIT_defconfig
@@ -21,5 +21,4 @@ CONFIG_PHYLIB=y
 CONFIG_SYS_NS16550=y
 CONFIG_USB=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_OF_LIBFDT=y
diff --git a/configs/MPC8641HPCN_defconfig b/configs/MPC8641HPCN_defconfig
index def36e41712..c8440d25846 100644
--- a/configs/MPC8641HPCN_defconfig
+++ b/configs/MPC8641HPCN_defconfig
@@ -21,5 +21,4 @@ CONFIG_PHYLIB=y
 CONFIG_SYS_NS16550=y
 CONFIG_USB=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_OF_LIBFDT=y
diff --git a/configs/apalis_imx6_defconfig b/configs/apalis_imx6_defconfig
index b2284acc34a..13f2a3b8493 100644
--- a/configs/apalis_imx6_defconfig
+++ b/configs/apalis_imx6_defconfig
@@ -54,7 +54,6 @@ CONFIG_NETDEVICES=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_GADGET=y
 CONFIG_CI_UDC=y
 CONFIG_USB_GADGET_DOWNLOAD=y
diff --git a/configs/apalis_imx6_nospl_com_defconfig b/configs/apalis_imx6_nospl_com_defconfig
index 239605dadfa..7165749cfb3 100644
--- a/configs/apalis_imx6_nospl_com_defconfig
+++ b/configs/apalis_imx6_nospl_com_defconfig
@@ -43,7 +43,6 @@ CONFIG_NETDEVICES=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_GADGET=y
 CONFIG_CI_UDC=y
 CONFIG_USB_GADGET_DOWNLOAD=y
diff --git a/configs/apalis_imx6_nospl_it_defconfig b/configs/apalis_imx6_nospl_it_defconfig
index 1bc05d7266d..0ad7674ee5d 100644
--- a/configs/apalis_imx6_nospl_it_defconfig
+++ b/configs/apalis_imx6_nospl_it_defconfig
@@ -43,7 +43,6 @@ CONFIG_NETDEVICES=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_GADGET=y
 CONFIG_CI_UDC=y
 CONFIG_USB_GADGET_DOWNLOAD=y
diff --git a/configs/colibri_imx6_defconfig b/configs/colibri_imx6_defconfig
index 7d1e709d4c4..7e100869a4d 100644
--- a/configs/colibri_imx6_defconfig
+++ b/configs/colibri_imx6_defconfig
@@ -52,7 +52,6 @@ CONFIG_PHY_MICREL=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_GADGET=y
 CONFIG_CI_UDC=y
 CONFIG_USB_GADGET_DOWNLOAD=y
diff --git a/configs/colibri_imx6_nospl_defconfig b/configs/colibri_imx6_nospl_defconfig
index 6877993088f..ba4b2dd9d42 100644
--- a/configs/colibri_imx6_nospl_defconfig
+++ b/configs/colibri_imx6_nospl_defconfig
@@ -41,7 +41,6 @@ CONFIG_PHY_MICREL=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_GADGET=y
 CONFIG_CI_UDC=y
 CONFIG_USB_GADGET_DOWNLOAD=y
diff --git a/configs/firefly-rk3288_defconfig b/configs/firefly-rk3288_defconfig
index 82da6016e65..178c879e265 100644
--- a/configs/firefly-rk3288_defconfig
+++ b/configs/firefly-rk3288_defconfig
@@ -73,7 +73,6 @@ CONFIG_USB=y
 CONFIG_USB_DWC2=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_DWC2_OTG=y
 CONFIG_USB_GADGET_DOWNLOAD=y
diff --git a/configs/mx6cuboxi_defconfig b/configs/mx6cuboxi_defconfig
index 5490e3546ba..27171fbddf5 100644
--- a/configs/mx6cuboxi_defconfig
+++ b/configs/mx6cuboxi_defconfig
@@ -34,6 +34,5 @@ CONFIG_DM_THERMAL=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 # CONFIG_VIDEO_SW_CURSOR is not set
 CONFIG_OF_LIBFDT=y
diff --git a/configs/rpi_2_defconfig b/configs/rpi_2_defconfig
index 23456977011..03705975bf2 100644
--- a/configs/rpi_2_defconfig
+++ b/configs/rpi_2_defconfig
@@ -26,7 +26,6 @@ CONFIG_DM_USB=y
 CONFIG_USB_DWC2=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_SMSC95XX=y
 CONFIG_DM_VIDEO=y
diff --git a/configs/rpi_3_32b_defconfig b/configs/rpi_3_32b_defconfig
index bb56a9e4e10..31d67ccdc99 100644
--- a/configs/rpi_3_32b_defconfig
+++ b/configs/rpi_3_32b_defconfig
@@ -28,7 +28,6 @@ CONFIG_DM_USB=y
 CONFIG_USB_DWC2=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_SMSC95XX=y
 CONFIG_DM_VIDEO=y
diff --git a/configs/rpi_3_defconfig b/configs/rpi_3_defconfig
index 6edacd69a2b..1ac3a96e250 100644
--- a/configs/rpi_3_defconfig
+++ b/configs/rpi_3_defconfig
@@ -28,7 +28,6 @@ CONFIG_DM_USB=y
 CONFIG_USB_DWC2=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_SMSC95XX=y
 CONFIG_DM_VIDEO=y
diff --git a/configs/rpi_defconfig b/configs/rpi_defconfig
index 2e81966c146..87e88223ee6 100644
--- a/configs/rpi_defconfig
+++ b/configs/rpi_defconfig
@@ -26,7 +26,6 @@ CONFIG_DM_USB=y
 CONFIG_USB_DWC2=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_SMSC95XX=y
 CONFIG_DM_VIDEO=y
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 310b8acc293..632e0aa0ee3 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -175,7 +175,6 @@ CONFIG_DM_USB=y
 CONFIG_USB_EMUL=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_DM_VIDEO=y
 CONFIG_CONSOLE_ROTATION=y
 CONFIG_CONSOLE_TRUETYPE=y
diff --git a/configs/sandbox_flattree_defconfig b/configs/sandbox_flattree_defconfig
index 50ea35e64bc..b1a341551f9 100644
--- a/configs/sandbox_flattree_defconfig
+++ b/configs/sandbox_flattree_defconfig
@@ -160,7 +160,6 @@ CONFIG_DM_USB=y
 CONFIG_USB_EMUL=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_DM_VIDEO=y
 CONFIG_CONSOLE_ROTATION=y
 CONFIG_CONSOLE_TRUETYPE=y
diff --git a/configs/sandbox_noblk_defconfig b/configs/sandbox_noblk_defconfig
index 693c14bc600..39101741b16 100644
--- a/configs/sandbox_noblk_defconfig
+++ b/configs/sandbox_noblk_defconfig
@@ -168,7 +168,6 @@ CONFIG_DM_USB=y
 CONFIG_USB_EMUL=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_DM_VIDEO=y
 CONFIG_CONSOLE_ROTATION=y
 CONFIG_CONSOLE_TRUETYPE=y
diff --git a/configs/sandbox_spl_defconfig b/configs/sandbox_spl_defconfig
index db9129456bf..7f03c6ed031 100644
--- a/configs/sandbox_spl_defconfig
+++ b/configs/sandbox_spl_defconfig
@@ -178,7 +178,6 @@ CONFIG_DM_USB=y
 CONFIG_USB_EMUL=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_DM_VIDEO=y
 CONFIG_CONSOLE_ROTATION=y
 CONFIG_CONSOLE_TRUETYPE=y
diff --git a/configs/seaboard_defconfig b/configs/seaboard_defconfig
index ea4546bce4a..810cfaa498f 100644
--- a/configs/seaboard_defconfig
+++ b/configs/seaboard_defconfig
@@ -36,7 +36,6 @@ CONFIG_USB_ULPI_VIEWPORT=y
 CONFIG_USB_ULPI=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_ASIX=y
 CONFIG_DM_VIDEO=y
diff --git a/configs/ventana_defconfig b/configs/ventana_defconfig
index 42353f034ed..b11dab11960 100644
--- a/configs/ventana_defconfig
+++ b/configs/ventana_defconfig
@@ -34,7 +34,6 @@ CONFIG_USB_ULPI_VIEWPORT=y
 CONFIG_USB_ULPI=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
-CONFIG_SYS_USB_EVENT_POLL=y
 CONFIG_USB_HOST_ETHER=y
 CONFIG_USB_ETHER_ASIX=y
 CONFIG_DM_VIDEO=y
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 62126aad2fb..e7658b4d95c 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -75,7 +75,7 @@ if USB_KEYBOARD
 
 choice
 	prompt "USB keyboard polling"
-	optional
+	default SYS_USB_EVENT_POLL
 	---help---
 	  Enable a polling mechanism for USB keyboard.
 
diff --git a/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c b/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c
index 0d6d2fba8a0..b6164afa924 100644
--- a/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c
+++ b/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c
@@ -111,7 +111,8 @@ static int setdma_rx(struct dwc2_ep *ep, struct dwc2_request *req)
 	ctrl =  readl(&reg->out_endp[ep_num].doepctl);
 
 	invalidate_dcache_range((unsigned long) ep->dma_buf,
-				(unsigned long) ep->dma_buf + ep->len);
+				(unsigned long) ep->dma_buf +
+				ROUND(ep->len, CONFIG_SYS_CACHELINE_SIZE));
 
 	writel((unsigned int) ep->dma_buf, &reg->out_endp[ep_num].doepdma);
 	writel(DOEPT_SIZ_PKT_CNT(pktcnt) | DOEPT_SIZ_XFER_SIZE(length),
diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c
index 64c42ac4715..0ed72d5ae71 100644
--- a/drivers/usb/host/dwc2.c
+++ b/drivers/usb/host/dwc2.c
@@ -1245,7 +1245,7 @@ static int dwc2_usb_ofdata_to_platdata(struct udevice *dev)
 	struct dwc2_priv *priv = dev_get_priv(dev);
 	fdt_addr_t addr;
 
-	addr = devfdt_get_addr(dev);
+	addr = dev_read_addr(dev);
 	if (addr == FDT_ADDR_T_NONE)
 		return -EINVAL;
 	priv->regs = (struct dwc2_core_regs *)addr;
diff --git a/drivers/usb/host/ehci-generic.c b/drivers/usb/host/ehci-generic.c
index 03f8d321af1..18e1e0ee885 100644
--- a/drivers/usb/host/ehci-generic.c
+++ b/drivers/usb/host/ehci-generic.c
@@ -108,7 +108,7 @@ static int ehci_usb_probe(struct udevice *dev)
 		}
 	}
 
-	hccr = map_physmem(devfdt_get_addr(dev), 0x100, MAP_NOCACHE);
+	hccr = map_physmem(dev_read_addr(dev), 0x100, MAP_NOCACHE);
 	hcor = (struct ehci_hcor *)((uintptr_t)hccr +
 				    HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
 
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 3243c1d1cf2..be3e842dcc3 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1596,6 +1596,17 @@ static int ehci_destroy_int_queue(struct udevice *dev, struct usb_device *udev,
 	return _ehci_destroy_int_queue(udev, queue);
 }
 
+static int ehci_get_max_xfer_size(struct udevice *dev, size_t *size)
+{
+	/*
+	 * EHCD can handle any transfer length as long as there is enough
+	 * free heap space left, hence set the theoretical max number here.
+	 */
+	*size = SIZE_MAX;
+
+	return 0;
+}
+
 int ehci_register(struct udevice *dev, struct ehci_hccr *hccr,
 		  struct ehci_hcor *hcor, const struct ehci_ops *ops,
 		  uint tweaks, enum usb_init_type init)
@@ -1658,6 +1669,7 @@ struct dm_usb_ops ehci_usb_ops = {
 	.create_int_queue = ehci_create_int_queue,
 	.poll_int_queue = ehci_poll_int_queue,
 	.destroy_int_queue = ehci_destroy_int_queue,
+	.get_max_xfer_size  = ehci_get_max_xfer_size,
 };
 
 #endif
diff --git a/drivers/usb/host/usb-uclass.c b/drivers/usb/host/usb-uclass.c
index 0b8a501ce88..bc44fc3394d 100644
--- a/drivers/usb/host/usb-uclass.c
+++ b/drivers/usb/host/usb-uclass.c
@@ -150,6 +150,17 @@ int usb_update_hub_device(struct usb_device *udev)
 	return ops->update_hub_device(bus, udev);
 }
 
+int usb_get_max_xfer_size(struct usb_device *udev, size_t *size)
+{
+	struct udevice *bus = udev->controller_dev;
+	struct dm_usb_ops *ops = usb_get_ops(bus);
+
+	if (!ops->get_max_xfer_size)
+		return -ENOSYS;
+
+	return ops->get_max_xfer_size(bus, size);
+}
+
 int usb_stop(void)
 {
 	struct udevice *bus;
diff --git a/drivers/usb/host/xhci-rockchip.c b/drivers/usb/host/xhci-rockchip.c
index ec55f4e59f7..ca3abffba07 100644
--- a/drivers/usb/host/xhci-rockchip.c
+++ b/drivers/usb/host/xhci-rockchip.c
@@ -6,8 +6,6 @@
  */
 #include <common.h>
 #include <dm.h>
-#include <fdtdec.h>
-#include <libfdt.h>
 #include <malloc.h>
 #include <usb.h>
 #include <watchdog.h>
@@ -46,7 +44,7 @@ static int xhci_usb_ofdata_to_platdata(struct udevice *dev)
 	/*
 	 * Get the base address for XHCI controller from the device node
 	 */
-	plat->hcd_base = devfdt_get_addr(dev);
+	plat->hcd_base = dev_read_addr(dev);
 	if (plat->hcd_base == FDT_ADDR_T_NONE) {
 		error("Can't get the XHCI register base address\n");
 		return -ENXIO;
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 9b82ee5c602..04eb1eb14d1 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1228,6 +1228,20 @@ static int xhci_update_hub_device(struct udevice *dev, struct usb_device *udev)
 	return xhci_configure_endpoints(udev, false);
 }
 
+static int xhci_get_max_xfer_size(struct udevice *dev, size_t *size)
+{
+	/*
+	 * xHCD allocates one segment which includes 64 TRBs for each endpoint
+	 * and the last TRB in this segment is configured as a link TRB to form
+	 * a TRB ring. Each TRB can transfer up to 64K bytes, however data
+	 * buffers referenced by transfer TRBs shall not span 64KB boundaries.
+	 * Hence the maximum number of TRBs we can use in one transfer is 62.
+	 */
+	*size = (TRBS_PER_SEGMENT - 2) * TRB_MAX_BUFF_SIZE;
+
+	return 0;
+}
+
 int xhci_register(struct udevice *dev, struct xhci_hccr *hccr,
 		  struct xhci_hcor *hcor)
 {
@@ -1281,6 +1295,7 @@ struct dm_usb_ops xhci_usb_ops = {
 	.interrupt = xhci_submit_int_msg,
 	.alloc_device = xhci_alloc_device,
 	.update_hub_device = xhci_update_hub_device,
+	.get_max_xfer_size  = xhci_get_max_xfer_size,
 };
 
 #endif
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index a497d9d830f..3377450fcad 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1045,9 +1045,9 @@ struct xhci_scratchpad {
  * (1K bytes * 8bytes/bit) / (4*32 bits) = 64 segment entries in the table,
  * meaning 64 ring segments.
  * Initial allocated size of the ERST, in number of entries */
-#define	ERST_NUM_SEGS	3
+#define	ERST_NUM_SEGS	1
 /* Initial number of event segment rings allocated */
-#define	ERST_ENTRIES	3
+#define	ERST_ENTRIES	1
 /* Initial allocated size of the ERST, in number of entries */
 #define	ERST_SIZE	64
 /* Poll every 60 seconds */
diff --git a/include/usb.h b/include/usb.h
index fad04016a34..0ddc0822b41 100644
--- a/include/usb.h
+++ b/include/usb.h
@@ -766,6 +766,14 @@ struct dm_usb_ops {
 	 * representation of this hub can be updated (xHCI)
 	 */
 	int (*update_hub_device)(struct udevice *bus, struct usb_device *udev);
+
+	/**
+	 * get_max_xfer_size() - Get HCD's maximum transfer bytes
+	 *
+	 * The HCD may have limitation on the maximum bytes to be transferred
+	 * in a USB transfer. USB class driver needs to be aware of this.
+	 */
+	int (*get_max_xfer_size)(struct udevice *bus, size_t *size);
 };
 
 #define usb_get_ops(dev)	((struct dm_usb_ops *)(dev)->driver->ops)
@@ -939,7 +947,7 @@ int usb_new_device(struct usb_device *dev);
 int usb_alloc_device(struct usb_device *dev);
 
 /**
- * update_hub_device() - Update HCD's internal representation of hub
+ * usb_update_hub_device() - Update HCD's internal representation of hub
  *
  * After a hub descriptor is fetched, notify HCD so that its internal
  * representation of this hub can be updated.
@@ -950,6 +958,18 @@ int usb_alloc_device(struct usb_device *dev);
 int usb_update_hub_device(struct usb_device *dev);
 
 /**
+ * usb_get_max_xfer_size() - Get HCD's maximum transfer bytes
+ *
+ * The HCD may have limitation on the maximum bytes to be transferred
+ * in a USB transfer. USB class driver needs to be aware of this.
+ *
+ * @dev:		USB device
+ * @size:		maximum transfer bytes
+ * @return 0 if OK, -ve on error
+ */
+int usb_get_max_xfer_size(struct usb_device *dev, size_t *size);
+
+/**
  * usb_emul_setup_device() - Set up a new USB device emulation
  *
  * This is normally called when a new emulation device is bound. It tells