2 * (C) Copyright 2014, Xilinx, Inc
4 * USB Low level initialization(Specific to zynq)
6 * SPDX-License-Identifier: GPL-2.0+
12 #include <asm/arch/hardware.h>
13 #include <asm/arch/sys_proto.h>
15 #include <usb/ehci-ci.h>
20 struct zynq_ehci_priv {
21 struct ehci_ctrl ehcictrl;
22 struct usb_ehci *ehci;
25 static int ehci_zynq_ofdata_to_platdata(struct udevice *dev)
27 struct zynq_ehci_priv *priv = dev_get_priv(dev);
29 priv->ehci = (struct usb_ehci *)dev_get_addr_ptr(dev);
36 static int ehci_zynq_probe(struct udevice *dev)
38 struct usb_platdata *plat = dev_get_platdata(dev);
39 struct zynq_ehci_priv *priv = dev_get_priv(dev);
40 struct ehci_hccr *hccr;
41 struct ehci_hcor *hcor;
42 struct ulpi_viewport ulpi_vp;
43 /* Used for writing the ULPI data address */
44 struct ulpi_regs *ulpi = (struct ulpi_regs *)0;
47 hccr = (struct ehci_hccr *)((uint32_t)&priv->ehci->caplength);
48 hcor = (struct ehci_hcor *)((uint32_t) hccr +
49 HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
51 ulpi_vp.viewport_addr = (u32)&priv->ehci->ulpi_viewpoint;
54 ret = ulpi_init(&ulpi_vp);
56 puts("zynq ULPI viewport init failed\n");
61 ulpi_write(&ulpi_vp, &ulpi->otg_ctrl,
62 ULPI_OTG_DP_PULLDOWN | ULPI_OTG_DM_PULLDOWN |
64 ulpi_write(&ulpi_vp, &ulpi->function_ctrl,
65 ULPI_FC_FULL_SPEED | ULPI_FC_OPMODE_NORMAL |
67 ulpi_write(&ulpi_vp, &ulpi->iface_ctrl, 0);
70 ulpi_write(&ulpi_vp, &ulpi->otg_ctrl_set,
71 ULPI_OTG_DRVVBUS | ULPI_OTG_DRVVBUS_EXT);
73 return ehci_register(dev, hccr, hcor, NULL, 0, plat->init_type);
76 static const struct udevice_id ehci_zynq_ids[] = {
77 { .compatible = "xlnx,zynq-usb-2.20a" },
81 U_BOOT_DRIVER(ehci_zynq) = {
84 .of_match = ehci_zynq_ids,
85 .ofdata_to_platdata = ehci_zynq_ofdata_to_platdata,
86 .probe = ehci_zynq_probe,
87 .remove = ehci_deregister,
89 .platdata_auto_alloc_size = sizeof(struct usb_platdata),
90 .priv_auto_alloc_size = sizeof(struct zynq_ehci_priv),
91 .flags = DM_FLAG_ALLOC_PRIV_DMA,