summaryrefslogtreecommitdiffstats
path: root/arch/mips/netlogic/xlp/usb-init.c
blob: ef3897ef0dc711d05ea06383b2080f17d2eaa643 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
/*
 * Copyright (c) 2003-2012 Broadcom Corporation
 * All Rights Reserved
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the Broadcom
 * license below:
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY BROADCOM ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/dma-mapping.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/platform_device.h>

#include <asm/netlogic/haldefs.h>
#include <asm/netlogic/xlp-hal/iomap.h>
#include <asm/netlogic/xlp-hal/xlp.h>

/*
 * USB glue logic registers, used only during initialization
 */
#define USB_CTL_0			0x01
#define USB_PHY_0			0x0A
#define USB_PHY_RESET			0x01
#define USB_PHY_PORT_RESET_0		0x10
#define USB_PHY_PORT_RESET_1		0x20
#define USB_CONTROLLER_RESET		0x01
#define USB_INT_STATUS			0x0E
#define USB_INT_EN			0x0F
#define USB_PHY_INTERRUPT_EN		0x01
#define USB_OHCI_INTERRUPT_EN		0x02
#define USB_OHCI_INTERRUPT1_EN		0x04
#define USB_OHCI_INTERRUPT2_EN		0x08
#define USB_CTRL_INTERRUPT_EN		0x10

#define nlm_read_usb_reg(b, r)			nlm_read_reg(b, r)
#define nlm_write_usb_reg(b, r, v)		nlm_write_reg(b, r, v)
#define nlm_get_usb_pcibase(node, inst)		\
	nlm_pcicfg_base(XLP_IO_USB_OFFSET(node, inst))
#define nlm_get_usb_regbase(node, inst)		\
	(nlm_get_usb_pcibase(node, inst) + XLP_IO_PCI_HDRSZ)

static void nlm_usb_intr_en(int node, int port)
{
	uint32_t val;
	uint64_t port_addr;

	port_addr = nlm_get_usb_regbase(node, port);
	val = nlm_read_usb_reg(port_addr, USB_INT_EN);
	val = USB_CTRL_INTERRUPT_EN  | USB_OHCI_INTERRUPT_EN |
		USB_OHCI_INTERRUPT1_EN | USB_CTRL_INTERRUPT_EN	|
		USB_OHCI_INTERRUPT_EN | USB_OHCI_INTERRUPT2_EN;
	nlm_write_usb_reg(port_addr, USB_INT_EN, val);
}

static void nlm_usb_hw_reset(int node, int port)
{
	uint64_t port_addr;
	uint32_t val;

	/* reset USB phy */
	port_addr = nlm_get_usb_regbase(node, port);
	val = nlm_read_usb_reg(port_addr, USB_PHY_0);
	val &= ~(USB_PHY_RESET | USB_PHY_PORT_RESET_0 | USB_PHY_PORT_RESET_1);
	nlm_write_usb_reg(port_addr, USB_PHY_0, val);

	mdelay(100);
	val = nlm_read_usb_reg(port_addr, USB_CTL_0);
	val &= ~(USB_CONTROLLER_RESET);
	val |= 0x4;
	nlm_write_usb_reg(port_addr, USB_CTL_0, val);
}

static int __init nlm_platform_usb_init(void)
{
	pr_info("Initializing USB Interface\n");
	nlm_usb_hw_reset(0, 0);
	nlm_usb_hw_reset(0, 3);

	/* Enable PHY interrupts */
	nlm_usb_intr_en(0, 0);
	nlm_usb_intr_en(0, 3);

	return 0;
}

arch_initcall(nlm_platform_usb_init);

static u64 xlp_usb_dmamask = ~(u32)0;

/* Fixup the IRQ for USB devices which is exist on XLP SOC PCIE bus */
static void nlm_usb_fixup_final(struct pci_dev *dev)
{
	dev->dev.dma_mask		= &xlp_usb_dmamask;
	dev->dev.coherent_dma_mask	= DMA_BIT_MASK(32);
	switch (dev->devfn) {
	case 0x10:
		dev->irq = PIC_EHCI_0_IRQ;
		break;
	case 0x11:
		dev->irq = PIC_OHCI_0_IRQ;
		break;
	case 0x12:
		dev->irq = PIC_OHCI_1_IRQ;
		break;
	case 0x13:
		dev->irq = PIC_EHCI_1_IRQ;
		break;
	case 0x14:
		dev->irq = PIC_OHCI_2_IRQ;
		break;
	case 0x15:
		dev->irq = PIC_OHCI_3_IRQ;
		break;
	}
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_NETLOGIC, PCI_DEVICE_ID_NLM_EHCI,
		nlm_usb_fixup_final);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_NETLOGIC, PCI_DEVICE_ID_NLM_OHCI,
		nlm_usb_fixup_final);