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// SPDX-License-Identifier: GPL-2.0
/*
* Layerscape DWC3 Glue layer
*
* Copyright (C) 2021 Michael Walle <michael@walle.cc>
*
* Based on dwc3-generic.c.
*/
#include <common.h>
#include <dm.h>
#include <dm/device_compat.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dwc3-uboot.h>
#include <linux/usb/gadget.h>
#include <usb.h>
#include "core.h"
#include "gadget.h"
#include <usb/xhci.h>
struct dwc3_layerscape_plat {
fdt_addr_t base;
u32 maximum_speed;
enum usb_dr_mode dr_mode;
};
struct dwc3_layerscape_priv {
void *base;
struct dwc3 dwc3;
struct phy_bulk phys;
};
struct dwc3_layerscape_host_priv {
struct xhci_ctrl xhci_ctrl;
struct dwc3_layerscape_priv gen_priv;
};
static int dwc3_layerscape_probe(struct udevice *dev,
struct dwc3_layerscape_priv *priv)
{
int rc;
struct dwc3_layerscape_plat *plat = dev_get_plat(dev);
struct dwc3 *dwc3 = &priv->dwc3;
dwc3->dev = dev;
dwc3->maximum_speed = plat->maximum_speed;
dwc3->dr_mode = plat->dr_mode;
if (CONFIG_IS_ENABLED(OF_CONTROL))
dwc3_of_parse(dwc3);
rc = dwc3_setup_phy(dev, &priv->phys);
if (rc && rc != -ENOTSUPP)
return rc;
priv->base = map_physmem(plat->base, DWC3_OTG_REGS_END, MAP_NOCACHE);
dwc3->regs = priv->base + DWC3_GLOBALS_REGS_START;
rc = dwc3_init(dwc3);
if (rc) {
unmap_physmem(priv->base, MAP_NOCACHE);
return rc;
}
return 0;
}
static int dwc3_layerscape_remove(struct udevice *dev,
struct dwc3_layerscape_priv *priv)
{
struct dwc3 *dwc3 = &priv->dwc3;
dwc3_remove(dwc3);
dwc3_shutdown_phy(dev, &priv->phys);
unmap_physmem(dwc3->regs, MAP_NOCACHE);
return 0;
}
static int dwc3_layerscape_of_to_plat(struct udevice *dev)
{
struct dwc3_layerscape_plat *plat = dev_get_plat(dev);
ofnode node = dev_ofnode(dev);
plat->base = dev_read_addr(dev);
plat->maximum_speed = usb_get_maximum_speed(node);
if (plat->maximum_speed == USB_SPEED_UNKNOWN) {
dev_dbg(dev, "No USB maximum speed specified. Using super speed\n");
plat->maximum_speed = USB_SPEED_SUPER;
}
plat->dr_mode = usb_get_dr_mode(node);
if (plat->dr_mode == USB_DR_MODE_UNKNOWN) {
dev_err(dev, "Invalid usb mode setup\n");
return -ENODEV;
}
return 0;
}
#if CONFIG_IS_ENABLED(DM_USB_GADGET)
int dm_usb_gadget_handle_interrupts(struct udevice *dev)
{
struct dwc3_layerscape_priv *priv = dev_get_priv(dev);
dwc3_gadget_uboot_handle_interrupt(&priv->dwc3);
return 0;
}
static int dwc3_layerscape_peripheral_probe(struct udevice *dev)
{
struct dwc3_layerscape_priv *priv = dev_get_priv(dev);
return dwc3_layerscape_probe(dev, priv);
}
static int dwc3_layerscape_peripheral_remove(struct udevice *dev)
{
struct dwc3_layerscape_priv *priv = dev_get_priv(dev);
return dwc3_layerscape_remove(dev, priv);
}
U_BOOT_DRIVER(dwc3_layerscape_peripheral) = {
.name = "dwc3-layerscape-peripheral",
.id = UCLASS_USB_GADGET_GENERIC,
.of_to_plat = dwc3_layerscape_of_to_plat,
.probe = dwc3_layerscape_peripheral_probe,
.remove = dwc3_layerscape_peripheral_remove,
.priv_auto = sizeof(struct dwc3_layerscape_priv),
.plat_auto = sizeof(struct dwc3_layerscape_plat),
};
#endif
#if defined(CONFIG_SPL_USB_HOST_SUPPORT) || \
!defined(CONFIG_SPL_BUILD) && defined(CONFIG_USB_HOST)
static int dwc3_layerscape_host_probe(struct udevice *dev)
{
struct xhci_hcor *hcor;
struct xhci_hccr *hccr;
struct dwc3_layerscape_host_priv *priv = dev_get_priv(dev);
int rc;
rc = dwc3_layerscape_probe(dev, &priv->gen_priv);
if (rc)
return rc;
hccr = priv->gen_priv.base;
hcor = priv->gen_priv.base + HC_LENGTH(xhci_readl(&hccr->cr_capbase));
return xhci_register(dev, hccr, hcor);
}
static int dwc3_layerscape_host_remove(struct udevice *dev)
{
struct dwc3_layerscape_host_priv *priv = dev_get_priv(dev);
int rc;
rc = xhci_deregister(dev);
if (rc)
return rc;
return dwc3_layerscape_remove(dev, &priv->gen_priv);
}
U_BOOT_DRIVER(dwc3_layerscape_host) = {
.name = "dwc3-layerscape-host",
.id = UCLASS_USB,
.of_to_plat = dwc3_layerscape_of_to_plat,
.probe = dwc3_layerscape_host_probe,
.remove = dwc3_layerscape_host_remove,
.priv_auto = sizeof(struct dwc3_layerscape_host_priv),
.plat_auto = sizeof(struct dwc3_layerscape_plat),
.ops = &xhci_usb_ops,
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};
#endif
static int dwc3_layerscape_bind(struct udevice *dev)
{
ofnode node = dev_ofnode(dev);
const char *name = ofnode_get_name(node);
enum usb_dr_mode dr_mode;
char *driver;
dr_mode = usb_get_dr_mode(node);
switch (dr_mode) {
#if CONFIG_IS_ENABLED(DM_USB_GADGET)
case USB_DR_MODE_PERIPHERAL:
dev_dbg(dev, "Using peripheral mode\n");
driver = "dwc3-layerscape-peripheral";
break;
#endif
#if defined(CONFIG_SPL_USB_HOST_SUPPORT) || !defined(CONFIG_SPL_BUILD)
case USB_DR_MODE_HOST:
dev_dbg(dev, "Using host mode\n");
driver = "dwc3-layerscape-host";
break;
#endif
default:
dev_dbg(dev, "Unsupported dr_mode\n");
return -ENODEV;
};
return device_bind_driver_to_node(dev, driver, name, node, NULL);
}
static const struct udevice_id dwc3_layerscape_ids[] = {
{ .compatible = "fsl,layerscape-dwc3" },
{ .compatible = "fsl,ls1028a-dwc3" },
{ }
};
U_BOOT_DRIVER(dwc3_layerscape_wrapper) = {
.name = "dwc3-layerscape-wrapper",
.id = UCLASS_NOP,
.of_match = dwc3_layerscape_ids,
.bind = dwc3_layerscape_bind,
};
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