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