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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2014, Xilinx, Inc
*
* USB Low level initialization(Specific to zynq)
*/
#include <common.h>
#include <dm.h>
#include <usb.h>
#include <asm/arch/hardware.h>
#include <asm/arch/sys_proto.h>
#include <asm/io.h>
#include <usb/ehci-ci.h>
#include <usb/ulpi.h>
#include "ehci.h"
struct zynq_ehci_priv {
struct ehci_ctrl ehcictrl;
struct usb_ehci *ehci;
};
static int ehci_zynq_of_to_plat(struct udevice *dev)
{
struct zynq_ehci_priv *priv = dev_get_priv(dev);
priv->ehci = dev_read_addr_ptr(dev);
if (!priv->ehci)
return -EINVAL;
return 0;
}
static int ehci_zynq_probe(struct udevice *dev)
{
struct usb_plat *plat = dev_get_plat(dev);
struct zynq_ehci_priv *priv = dev_get_priv(dev);
struct ehci_hccr *hccr;
struct ehci_hcor *hcor;
struct ulpi_viewport ulpi_vp;
/* Used for writing the ULPI data address */
struct ulpi_regs *ulpi = (struct ulpi_regs *)0;
int ret;
hccr = (struct ehci_hccr *)((uint32_t)&priv->ehci->caplength);
hcor = (struct ehci_hcor *)((uint32_t) hccr +
HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
ulpi_vp.viewport_addr = (u32)&priv->ehci->ulpi_viewpoint;
ulpi_vp.port_num = 0;
ret = ulpi_init(&ulpi_vp);
if (ret) {
puts("zynq ULPI viewport init failed\n");
return -1;
}
/* ULPI set flags */
ulpi_write(&ulpi_vp, &ulpi->otg_ctrl,
ULPI_OTG_DP_PULLDOWN | ULPI_OTG_DM_PULLDOWN |
ULPI_OTG_EXTVBUSIND);
ulpi_write(&ulpi_vp, &ulpi->function_ctrl,
ULPI_FC_FULL_SPEED | ULPI_FC_OPMODE_NORMAL |
ULPI_FC_SUSPENDM);
ulpi_write(&ulpi_vp, &ulpi->iface_ctrl, 0);
/* Set VBus */
ulpi_write(&ulpi_vp, &ulpi->otg_ctrl_set,
ULPI_OTG_DRVVBUS | ULPI_OTG_DRVVBUS_EXT);
return ehci_register(dev, hccr, hcor, NULL, 0, plat->init_type);
}
static const struct udevice_id ehci_zynq_ids[] = {
{ .compatible = "xlnx,zynq-usb-2.20a" },
{ }
};
U_BOOT_DRIVER(ehci_zynq) = {
.name = "ehci_zynq",
.id = UCLASS_USB,
.of_match = ehci_zynq_ids,
.of_to_plat = ehci_zynq_of_to_plat,
.probe = ehci_zynq_probe,
.remove = ehci_deregister,
.ops = &ehci_usb_ops,
.plat_auto = sizeof(struct usb_plat),
.priv_auto = sizeof(struct zynq_ehci_priv),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};
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