The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/nlm/usb_init.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright 2003-2011 Netlogic Microsystems (Netlogic). All rights
    5  * reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions are
    9  * met:
   10  *
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in
   15  *    the documentation and/or other materials provided with the
   16  *    distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY Netlogic Microsystems ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   21  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE
   22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   28  * THE POSSIBILITY OF SUCH DAMAGE.
   29  *
   30  * NETLOGIC_BSD */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD: stable/12/sys/mips/nlm/usb_init.c 343709 2019-02-03 08:53:03Z gonzo $");
   34 #include <sys/types.h>
   35 #include <sys/systm.h>
   36 #include <sys/param.h>
   37 #include <sys/kernel.h>
   38 
   39 #include <mips/nlm/hal/haldefs.h>
   40 #include <mips/nlm/hal/iomap.h>
   41 #include <mips/nlm/hal/usb.h>
   42 
   43 #include <mips/nlm/xlp.h>
   44 
   45 
   46 static void
   47 nlm_usb_intr_en(int node, int port)
   48 {
   49         uint32_t val;
   50         uint64_t port_addr;
   51 
   52         port_addr = nlm_get_usb_regbase(node, port);
   53         val = nlm_read_usb_reg(port_addr, USB_INT_EN);
   54         val = USB_CTRL_INTERRUPT_EN  | USB_OHCI_INTERRUPT_EN |
   55                 USB_OHCI_INTERRUPT1_EN | USB_OHCI_INTERRUPT2_EN;
   56         nlm_write_usb_reg(port_addr, USB_INT_EN, val);
   57 }
   58 
   59 static void
   60 nlm_usb_hw_reset(int node, int port)
   61 {
   62         uint64_t port_addr;
   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);
   68         val &= ~(USB_PHY_RESET | USB_PHY_PORT_RESET_0 | USB_PHY_PORT_RESET_1);
   69         nlm_write_usb_reg(port_addr, USB_PHY_0, val);
   70 
   71         DELAY(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 void
   79 nlm_usb_init(void)
   80 {
   81         /* XXX: should be checking if these are in Device mode here */
   82         printf("Initialize USB Interface\n");
   83         nlm_usb_hw_reset(0, 0);
   84         nlm_usb_hw_reset(0, 3);
   85 
   86         /* Enable PHY interrupts */
   87         nlm_usb_intr_en(0, 0);
   88         nlm_usb_intr_en(0, 3);
   89 }
   90 
   91 SYSINIT(nlm_usb_init, SI_SUB_CPU, SI_ORDER_MIDDLE,
   92     nlm_usb_init, NULL);

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