// SPDX-License-Identifier: GPL-2.0
|
/*
|
* Copyright (C) 2014 Marvell
|
* Author: Gregory CLEMENT <gregory.clement@free-electrons.com>
|
*/
|
|
#include <linux/io.h>
|
#include <linux/mbus.h>
|
#include <linux/of.h>
|
#include <linux/platform_device.h>
|
|
#include <linux/usb.h>
|
#include <linux/usb/hcd.h>
|
|
#include "xhci-mvebu.h"
|
|
#define USB3_MAX_WINDOWS 4
|
#define USB3_WIN_CTRL(w) (0x0 + ((w) * 8))
|
#define USB3_WIN_BASE(w) (0x4 + ((w) * 8))
|
|
static void xhci_mvebu_mbus_config(void __iomem *base,
|
const struct mbus_dram_target_info *dram)
|
{
|
int win;
|
|
/* Clear all existing windows */
|
for (win = 0; win < USB3_MAX_WINDOWS; win++) {
|
writel(0, base + USB3_WIN_CTRL(win));
|
writel(0, base + USB3_WIN_BASE(win));
|
}
|
|
/* Program each DRAM CS in a seperate window */
|
for (win = 0; win < dram->num_cs; win++) {
|
const struct mbus_dram_window *cs = dram->cs + win;
|
|
writel(((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) |
|
(dram->mbus_dram_target_id << 4) | 1,
|
base + USB3_WIN_CTRL(win));
|
|
writel((cs->base & 0xffff0000), base + USB3_WIN_BASE(win));
|
}
|
}
|
|
int xhci_mvebu_mbus_init_quirk(struct usb_hcd *hcd)
|
{
|
struct device *dev = hcd->self.controller;
|
struct platform_device *pdev = to_platform_device(dev);
|
struct resource *res;
|
void __iomem *base;
|
const struct mbus_dram_target_info *dram;
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
if (!res)
|
return -ENODEV;
|
|
/*
|
* We don't use devm_ioremap() because this mapping should
|
* only exists for the duration of this probe function.
|
*/
|
base = ioremap(res->start, resource_size(res));
|
if (!base)
|
return -ENODEV;
|
|
dram = mv_mbus_dram_info();
|
xhci_mvebu_mbus_config(base, dram);
|
|
/*
|
* This memory area was only needed to configure the MBus
|
* windows, and is therefore no longer useful.
|
*/
|
iounmap(base);
|
|
return 0;
|
}
|
