1/*
 2 * Copyright (C) 2014 Marvell
 3 * Author: Gregory CLEMENT <gregory.clement@free-electrons.com>
 4 *
 5 * This program is free software; you can redistribute it and/or
 6 * modify it under the terms of the GNU General Public License
 7 * version 2 as published by the Free Software Foundation.
 8 */
 9
10#include <linux/io.h>
11#include <linux/mbus.h>
12#include <linux/of.h>
13#include <linux/platform_device.h>
14
 
 
 
15#include "xhci-mvebu.h"
16
17#define USB3_MAX_WINDOWS	4
18#define USB3_WIN_CTRL(w)	(0x0 + ((w) * 8))
19#define USB3_WIN_BASE(w)	(0x4 + ((w) * 8))
20
21static void xhci_mvebu_mbus_config(void __iomem *base,
22			const struct mbus_dram_target_info *dram)
23{
24	int win;
25
26	/* Clear all existing windows */
27	for (win = 0; win < USB3_MAX_WINDOWS; win++) {
28		writel(0, base + USB3_WIN_CTRL(win));
29		writel(0, base + USB3_WIN_BASE(win));
30	}
31
32	/* Program each DRAM CS in a seperate window */
33	for (win = 0; win < dram->num_cs; win++) {
34		const struct mbus_dram_window *cs = dram->cs + win;
35
36		writel(((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) |
37		       (dram->mbus_dram_target_id << 4) | 1,
38		       base + USB3_WIN_CTRL(win));
39
40		writel((cs->base & 0xffff0000), base + USB3_WIN_BASE(win));
41	}
42}
43
44int xhci_mvebu_mbus_init_quirk(struct platform_device *pdev)
45{
 
 
46	struct resource	*res;
47	void __iomem *base;
48	const struct mbus_dram_target_info *dram;
49
50	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
51	if (!res)
52		return -ENODEV;
53
54	/*
55	 * We don't use devm_ioremap() because this mapping should
56	 * only exists for the duration of this probe function.
57	 */
58	base = ioremap(res->start, resource_size(res));
59	if (!base)
60		return -ENODEV;
61
62	dram = mv_mbus_dram_info();
63	xhci_mvebu_mbus_config(base, dram);
64
65	/*
66	 * This memory area was only needed to configure the MBus
67	 * windows, and is therefore no longer useful.
68	 */
69	iounmap(base);
70
71	return 0;
72}

 1/*
 2 * Copyright (C) 2014 Marvell
 3 * Author: Gregory CLEMENT <gregory.clement@free-electrons.com>
 4 *
 5 * This program is free software; you can redistribute it and/or
 6 * modify it under the terms of the GNU General Public License
 7 * version 2 as published by the Free Software Foundation.
 8 */
 9
10#include <linux/io.h>
11#include <linux/mbus.h>
12#include <linux/of.h>
13#include <linux/platform_device.h>
14
15#include <linux/usb.h>
16#include <linux/usb/hcd.h>
17
18#include "xhci-mvebu.h"
19
20#define USB3_MAX_WINDOWS	4
21#define USB3_WIN_CTRL(w)	(0x0 + ((w) * 8))
22#define USB3_WIN_BASE(w)	(0x4 + ((w) * 8))
23
24static void xhci_mvebu_mbus_config(void __iomem *base,
25			const struct mbus_dram_target_info *dram)
26{
27	int win;
28
29	/* Clear all existing windows */
30	for (win = 0; win < USB3_MAX_WINDOWS; win++) {
31		writel(0, base + USB3_WIN_CTRL(win));
32		writel(0, base + USB3_WIN_BASE(win));
33	}
34
35	/* Program each DRAM CS in a seperate window */
36	for (win = 0; win < dram->num_cs; win++) {
37		const struct mbus_dram_window *cs = dram->cs + win;
38
39		writel(((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) |
40		       (dram->mbus_dram_target_id << 4) | 1,
41		       base + USB3_WIN_CTRL(win));
42
43		writel((cs->base & 0xffff0000), base + USB3_WIN_BASE(win));
44	}
45}
46
47int xhci_mvebu_mbus_init_quirk(struct usb_hcd *hcd)
48{
49	struct device *dev = hcd->self.controller;
50	struct platform_device *pdev = to_platform_device(dev);
51	struct resource	*res;
52	void __iomem *base;
53	const struct mbus_dram_target_info *dram;
54
55	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
56	if (!res)
57		return -ENODEV;
58
59	/*
60	 * We don't use devm_ioremap() because this mapping should
61	 * only exists for the duration of this probe function.
62	 */
63	base = ioremap(res->start, resource_size(res));
64	if (!base)
65		return -ENODEV;
66
67	dram = mv_mbus_dram_info();
68	xhci_mvebu_mbus_config(base, dram);
69
70	/*
71	 * This memory area was only needed to configure the MBus
72	 * windows, and is therefore no longer useful.
73	 */
74	iounmap(base);
75
76	return 0;
77}