1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2014, Xilinx, Inc
4 *
5 * USB Low level initialization(Specific to zynq)
6 */
7
8 #include <common.h>
9 #include <dm.h>
10 #include <usb.h>
11 #include <asm/arch/hardware.h>
12 #include <asm/arch/sys_proto.h>
13 #include <asm/io.h>
14 #include <usb/ehci-ci.h>
15 #include <usb/ulpi.h>
16
17 #include "ehci.h"
18
19 struct zynq_ehci_priv {
20 struct ehci_ctrl ehcictrl;
21 struct usb_ehci *ehci;
22 };
23
ehci_zynq_of_to_plat(struct udevice * dev)24 static int ehci_zynq_of_to_plat(struct udevice *dev)
25 {
26 struct zynq_ehci_priv *priv = dev_get_priv(dev);
27
28 priv->ehci = dev_read_addr_ptr(dev);
29 if (!priv->ehci)
30 return -EINVAL;
31
32 return 0;
33 }
34
ehci_zynq_probe(struct udevice * dev)35 static int ehci_zynq_probe(struct udevice *dev)
36 {
37 struct usb_plat *plat = dev_get_plat(dev);
38 struct zynq_ehci_priv *priv = dev_get_priv(dev);
39 struct ehci_hccr *hccr;
40 struct ehci_hcor *hcor;
41 struct ulpi_viewport ulpi_vp;
42 /* Used for writing the ULPI data address */
43 struct ulpi_regs *ulpi = (struct ulpi_regs *)0;
44 int ret;
45
46 hccr = (struct ehci_hccr *)((uint32_t)&priv->ehci->caplength);
47 hcor = (struct ehci_hcor *)((uint32_t) hccr +
48 HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
49
50 ulpi_vp.viewport_addr = (u32)&priv->ehci->ulpi_viewpoint;
51 ulpi_vp.port_num = 0;
52
53 ret = ulpi_init(&ulpi_vp);
54 if (ret) {
55 puts("zynq ULPI viewport init failed\n");
56 return -1;
57 }
58
59 /* ULPI set flags */
60 ulpi_write(&ulpi_vp, &ulpi->otg_ctrl,
61 ULPI_OTG_DP_PULLDOWN | ULPI_OTG_DM_PULLDOWN |
62 ULPI_OTG_EXTVBUSIND);
63 ulpi_write(&ulpi_vp, &ulpi->function_ctrl,
64 ULPI_FC_FULL_SPEED | ULPI_FC_OPMODE_NORMAL |
65 ULPI_FC_SUSPENDM);
66 ulpi_write(&ulpi_vp, &ulpi->iface_ctrl, 0);
67
68 /* Set VBus */
69 ulpi_write(&ulpi_vp, &ulpi->otg_ctrl_set,
70 ULPI_OTG_DRVVBUS | ULPI_OTG_DRVVBUS_EXT);
71
72 return ehci_register(dev, hccr, hcor, NULL, 0, plat->init_type);
73 }
74
75 static const struct udevice_id ehci_zynq_ids[] = {
76 { .compatible = "xlnx,zynq-usb-2.20a" },
77 { }
78 };
79
80 U_BOOT_DRIVER(ehci_zynq) = {
81 .name = "ehci_zynq",
82 .id = UCLASS_USB,
83 .of_match = ehci_zynq_ids,
84 .of_to_plat = ehci_zynq_of_to_plat,
85 .probe = ehci_zynq_probe,
86 .remove = ehci_deregister,
87 .ops = &ehci_usb_ops,
88 .plat_auto = sizeof(struct usb_plat),
89 .priv_auto = sizeof(struct zynq_ehci_priv),
90 .flags = DM_FLAG_ALLOC_PRIV_DMA,
91 };
92