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// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Copyright (C) 2014 Marvell
 4 * Author: Gregory CLEMENT <gregory.clement@free-electrons.com>
 
 
 
 
 5 */
 6
 7#include <linux/io.h>
 8#include <linux/mbus.h>
 9#include <linux/of.h>
10#include <linux/platform_device.h>
11
12#include <linux/usb.h>
13#include <linux/usb/hcd.h>
14
15#include "xhci-mvebu.h"
16#include "xhci.h"
17
18#define USB3_MAX_WINDOWS	4
19#define USB3_WIN_CTRL(w)	(0x0 + ((w) * 8))
20#define USB3_WIN_BASE(w)	(0x4 + ((w) * 8))
21
22static void xhci_mvebu_mbus_config(void __iomem *base,
23			const struct mbus_dram_target_info *dram)
24{
25	int win;
26
27	/* Clear all existing windows */
28	for (win = 0; win < USB3_MAX_WINDOWS; win++) {
29		writel(0, base + USB3_WIN_CTRL(win));
30		writel(0, base + USB3_WIN_BASE(win));
31	}
32
33	/* Program each DRAM CS in a seperate window */
34	for (win = 0; win < dram->num_cs; win++) {
35		const struct mbus_dram_window *cs = dram->cs + win;
36
37		writel(((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) |
38		       (dram->mbus_dram_target_id << 4) | 1,
39		       base + USB3_WIN_CTRL(win));
40
41		writel((cs->base & 0xffff0000), base + USB3_WIN_BASE(win));
42	}
43}
44
45int xhci_mvebu_mbus_init_quirk(struct usb_hcd *hcd)
46{
47	struct device *dev = hcd->self.controller;
48	struct platform_device *pdev = to_platform_device(dev);
49	struct resource	*res;
50	void __iomem *base;
51	const struct mbus_dram_target_info *dram;
52
53	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
54	if (!res)
55		return -ENODEV;
56
57	/*
58	 * We don't use devm_ioremap() because this mapping should
59	 * only exists for the duration of this probe function.
60	 */
61	base = ioremap(res->start, resource_size(res));
62	if (!base)
63		return -ENODEV;
64
65	dram = mv_mbus_dram_info();
66	xhci_mvebu_mbus_config(base, dram);
67
68	/*
69	 * This memory area was only needed to configure the MBus
70	 * windows, and is therefore no longer useful.
71	 */
72	iounmap(base);
73
74	return 0;
75}
76
77int xhci_mvebu_a3700_init_quirk(struct usb_hcd *hcd)
78{
79	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
80
81	/* Without reset on resume, the HC won't work at all */
82	xhci->quirks |= XHCI_RESET_ON_RESUME;
83
84	return 0;
85}