Linux Kernel  3.7.1
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usb-init.c
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1 /*
2  * Copyright (c) 2003-2012 Broadcom Corporation
3  * All Rights Reserved
4  *
5  * This software is available to you under a choice of one of two
6  * licenses. You may choose to be licensed under the terms of the GNU
7  * General Public License (GPL) Version 2, available from the file
8  * COPYING in the main directory of this source tree, or the Broadcom
9  * license below:
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  *
15  * 1. Redistributions of source code must retain the above copyright
16  * notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  * notice, this list of conditions and the following disclaimer in
19  * the documentation and/or other materials provided with the
20  * distribution.
21  *
22  * THIS SOFTWARE IS PROVIDED BY BROADCOM ``AS IS'' AND ANY EXPRESS OR
23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
29  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
31  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
32  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33  */
34 
35 #include <linux/dma-mapping.h>
36 #include <linux/kernel.h>
37 #include <linux/delay.h>
38 #include <linux/init.h>
39 #include <linux/pci.h>
40 #include <linux/platform_device.h>
41 
42 #include <asm/netlogic/haldefs.h>
46 
47 static void nlm_usb_intr_en(int node, int port)
48 {
49  uint32_t val;
51 
52  port_addr = nlm_get_usb_regbase(node, port);
53  val = nlm_read_usb_reg(port_addr, USB_INT_EN);
57  nlm_write_usb_reg(port_addr, USB_INT_EN, val);
58 }
59 
60 static void nlm_usb_hw_reset(int node, int port)
61 {
63  uint32_t val;
64 
65  /* reset USB phy */
66  port_addr = nlm_get_usb_regbase(node, port);
67  val = nlm_read_usb_reg(port_addr, USB_PHY_0);
69  nlm_write_usb_reg(port_addr, USB_PHY_0, val);
70 
71  mdelay(100);
72  val = nlm_read_usb_reg(port_addr, USB_CTL_0);
73  val &= ~(USB_CONTROLLER_RESET);
74  val |= 0x4;
75  nlm_write_usb_reg(port_addr, USB_CTL_0, val);
76 }
77 
78 static int __init nlm_platform_usb_init(void)
79 {
80  pr_info("Initializing USB Interface\n");
81  nlm_usb_hw_reset(0, 0);
82  nlm_usb_hw_reset(0, 3);
83 
84  /* Enable PHY interrupts */
85  nlm_usb_intr_en(0, 0);
86  nlm_usb_intr_en(0, 3);
87 
88  return 0;
89 }
90 
91 arch_initcall(nlm_platform_usb_init);
92 
93 static u64 xlp_usb_dmamask = ~(u32)0;
94 
95 /* Fixup the IRQ for USB devices which is exist on XLP SOC PCIE bus */
96 static void nlm_usb_fixup_final(struct pci_dev *dev)
97 {
98  dev->dev.dma_mask = &xlp_usb_dmamask;
99  dev->dev.coherent_dma_mask = DMA_BIT_MASK(64);
100  switch (dev->devfn) {
101  case 0x10:
102  dev->irq = PIC_EHCI_0_IRQ;
103  break;
104  case 0x11:
105  dev->irq = PIC_OHCI_0_IRQ;
106  break;
107  case 0x12:
108  dev->irq = PIC_OHCI_1_IRQ;
109  break;
110  case 0x13:
111  dev->irq = PIC_EHCI_1_IRQ;
112  break;
113  case 0x14:
114  dev->irq = PIC_OHCI_2_IRQ;
115  break;
116  case 0x15:
117  dev->irq = PIC_OHCI_3_IRQ;
118  break;
119  }
120 }
122  nlm_usb_fixup_final);
124  nlm_usb_fixup_final);