Release 4.7 drivers/usb/host/xhci-mvebu.c

/*
 * Copyright (C) 2014 Marvell
 * Author: Gregory CLEMENT <gregory.clement@free-electrons.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 */

#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));
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
gregory clement
gregory clement
148
100.00%
1
100.00%
Total
148
100.00%
1
100.00%



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;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
gregory clement
gregory clement
89
79.46%
1
50.00%
felipe balbi
felipe balbi
23
20.54%
1
50.00%
Total
112
100.00%
2
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
gregory clement
gregory clement
271
90.33%
1
50.00%
felipe balbi
felipe balbi
29
9.67%
1
50.00%
Total
300
100.00%
2
100.00%
  
Directory: drivers/usb/host

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.