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// SPDX-License-Identifier: GPL-2.0+
/*
* UniPhier Specific Glue Layer for DWC3
*
* Copyright (C) 2016-2017 Socionext Inc.
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
* Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
*/
#include <dm.h>
#include <dm/lists.h>
#include <linux/bitops.h>
#include <linux/usb/gadget.h>
#include "core.h"
#include "gadget.h"
#include "dwc3-generic.h"
#define UNIPHIER_PRO4_DWC3_RESET 0x40
#define UNIPHIER_PRO4_DWC3_RESET_XIOMMU BIT(5)
#define UNIPHIER_PRO4_DWC3_RESET_XLINK BIT(4)
#define UNIPHIER_PRO4_DWC3_RESET_PHY_SS BIT(2)
#define UNIPHIER_PRO5_DWC3_RESET 0x00
#define UNIPHIER_PRO5_DWC3_RESET_PHY_S1 BIT(17)
#define UNIPHIER_PRO5_DWC3_RESET_PHY_S0 BIT(16)
#define UNIPHIER_PRO5_DWC3_RESET_XLINK BIT(15)
#define UNIPHIER_PRO5_DWC3_RESET_XIOMMU BIT(14)
#define UNIPHIER_PXS2_DWC3_RESET 0x00
#define UNIPHIER_PXS2_DWC3_RESET_XLINK BIT(15)
static void uniphier_pro4_dwc3_init(struct udevice *dev, int index,
enum usb_dr_mode mode)
{
struct dwc3_glue_data *glue = dev_get_plat(dev);
void *regs = map_physmem(glue->regs, glue->size, MAP_NOCACHE);
u32 tmp;
tmp = readl(regs + UNIPHIER_PRO4_DWC3_RESET);
tmp &= ~UNIPHIER_PRO4_DWC3_RESET_PHY_SS;
tmp |= UNIPHIER_PRO4_DWC3_RESET_XIOMMU | UNIPHIER_PRO4_DWC3_RESET_XLINK;
writel(tmp, regs + UNIPHIER_PRO4_DWC3_RESET);
unmap_physmem(regs, MAP_NOCACHE);
}
static void uniphier_pro5_dwc3_init(struct udevice *dev, int index,
enum usb_dr_mode mode)
{
struct dwc3_glue_data *glue = dev_get_plat(dev);
void *regs = map_physmem(glue->regs, glue->size, MAP_NOCACHE);
u32 tmp;
tmp = readl(regs + UNIPHIER_PRO5_DWC3_RESET);
tmp &= ~(UNIPHIER_PRO5_DWC3_RESET_PHY_S1 |
UNIPHIER_PRO5_DWC3_RESET_PHY_S0);
tmp |= UNIPHIER_PRO5_DWC3_RESET_XLINK | UNIPHIER_PRO5_DWC3_RESET_XIOMMU;
writel(tmp, regs + UNIPHIER_PRO5_DWC3_RESET);
unmap_physmem(regs, MAP_NOCACHE);
}
static void uniphier_pxs2_dwc3_init(struct udevice *dev, int index,
enum usb_dr_mode mode)
{
struct dwc3_glue_data *glue = dev_get_plat(dev);
void *regs = map_physmem(glue->regs, glue->size, MAP_NOCACHE);
u32 tmp;
tmp = readl(regs + UNIPHIER_PXS2_DWC3_RESET);
tmp |= UNIPHIER_PXS2_DWC3_RESET_XLINK;
writel(tmp, regs + UNIPHIER_PXS2_DWC3_RESET);
unmap_physmem(regs, MAP_NOCACHE);
}
static int dwc3_uniphier_glue_get_ctrl_dev(struct udevice *dev, ofnode *node)
{
struct udevice *child;
const char *name;
ofnode subnode;
/*
* "controller reset" belongs to glue logic, and it should be
* accessible in .glue_configure() before access to the controller
* begins.
*/
ofnode_for_each_subnode(subnode, dev_ofnode(dev)) {
name = ofnode_get_name(subnode);
if (!strncmp(name, "reset", 5))
device_bind_driver_to_node(dev, "uniphier-reset",
name, subnode, &child);
}
/* Get controller node that is placed separately from the glue node */
*node = ofnode_by_compatible(dev_ofnode(dev->parent),
"socionext,uniphier-dwc3");
return 0;
}
static const struct dwc3_glue_ops uniphier_pro4_dwc3_ops = {
.glue_get_ctrl_dev = dwc3_uniphier_glue_get_ctrl_dev,
.glue_configure = uniphier_pro4_dwc3_init,
};
static const struct dwc3_glue_ops uniphier_pro5_dwc3_ops = {
.glue_get_ctrl_dev = dwc3_uniphier_glue_get_ctrl_dev,
.glue_configure = uniphier_pro5_dwc3_init,
};
static const struct dwc3_glue_ops uniphier_pxs2_dwc3_ops = {
.glue_get_ctrl_dev = dwc3_uniphier_glue_get_ctrl_dev,
.glue_configure = uniphier_pxs2_dwc3_init,
};
static const struct udevice_id uniphier_dwc3_match[] = {
{
.compatible = "socionext,uniphier-pro4-dwc3-glue",
.data = (ulong)&uniphier_pro4_dwc3_ops,
},
{
.compatible = "socionext,uniphier-pro5-dwc3-glue",
.data = (ulong)&uniphier_pro5_dwc3_ops,
},
{
.compatible = "socionext,uniphier-pxs2-dwc3-glue",
.data = (ulong)&uniphier_pxs2_dwc3_ops,
},
{
.compatible = "socionext,uniphier-ld20-dwc3-glue",
.data = (ulong)&uniphier_pxs2_dwc3_ops,
},
{
.compatible = "socionext,uniphier-pxs3-dwc3-glue",
.data = (ulong)&uniphier_pxs2_dwc3_ops,
},
{
.compatible = "socionext,uniphier-nx1-dwc3-glue",
.data = (ulong)&uniphier_pxs2_dwc3_ops,
},
{ /* sentinel */ }
};
U_BOOT_DRIVER(dwc3_uniphier_wrapper) = {
.name = "uniphier-dwc3",
.id = UCLASS_SIMPLE_BUS,
.of_match = uniphier_dwc3_match,
.bind = dwc3_glue_bind,
.probe = dwc3_glue_probe,
.remove = dwc3_glue_remove,
.plat_auto = sizeof(struct dwc3_glue_data),
};
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