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/cavium/obio.c

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    1 /*      $NetBSD: obio.c,v 1.11 2003/07/15 00:25:05 lukem Exp $  */
    2 
    3 /*-
    4  * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
    5  * All rights reserved.
    6  *
    7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. All advertising materials mentioning features or use of this software
   18  *    must display the following acknowledgement:
   19  *      This product includes software developed for the NetBSD Project by
   20  *      Wasabi Systems, Inc.
   21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
   22  *    or promote products derived from this software without specific prior
   23  *    written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
   26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
   29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   35  * POSSIBILITY OF SUCH DAMAGE.
   36  */
   37 
   38 /*
   39  * On-board device autoconfiguration support for Cavium OCTEON 1 family of
   40  * SoC devices.
   41  */
   42 
   43 #include <sys/cdefs.h>
   44 __FBSDID("$FreeBSD: releng/8.4/sys/mips/cavium/obio.c 215938 2010-11-27 12:26:40Z jchandra $");
   45 
   46 #include <sys/param.h>
   47 #include <sys/systm.h>
   48 #include <sys/bus.h>
   49 #include <sys/kernel.h>
   50 #include <sys/module.h>
   51 #include <sys/rman.h>
   52 #include <sys/malloc.h>
   53 
   54 #include <machine/bus.h>
   55 
   56 #include <mips/cavium/octeon_pcmap_regs.h>
   57 #include <mips/cavium/obiovar.h>
   58 
   59 #include <contrib/octeon-sdk/cvmx.h>
   60 #include <contrib/octeon-sdk/cvmx-interrupt.h>
   61 
   62 extern struct bus_space octeon_uart_tag;
   63 
   64 static void     obio_identify(driver_t *, device_t);
   65 static int      obio_probe(device_t);
   66 static int      obio_attach(device_t);
   67 
   68 static void
   69 obio_identify(driver_t *drv, device_t parent)
   70 {
   71         BUS_ADD_CHILD(parent, 0, "obio", 0);
   72 }
   73 
   74 static int
   75 obio_probe(device_t dev)
   76 {
   77         if (device_get_unit(dev) != 0)
   78                 return (ENXIO);
   79         return (0);
   80 }
   81 
   82 static int
   83 obio_attach(device_t dev)
   84 {
   85         struct obio_softc *sc = device_get_softc(dev);
   86 
   87         sc->oba_st = mips_bus_space_generic;
   88         /*
   89          * XXX
   90          * Here and elsewhere using RBR as a base address because it kind of
   91          * is, but that feels pretty sloppy.  Should consider adding a define
   92          * that's more semantic, at least.
   93          */
   94         sc->oba_addr = CVMX_MIO_UARTX_RBR(0);
   95         sc->oba_size = 0x10000;
   96         sc->oba_rman.rm_type = RMAN_ARRAY;
   97         sc->oba_rman.rm_descr = "OBIO I/O";
   98         if (rman_init(&sc->oba_rman) != 0 ||
   99             rman_manage_region(&sc->oba_rman,
  100             sc->oba_addr, sc->oba_addr + sc->oba_size) != 0)
  101                 panic("obio_attach: failed to set up I/O rman");
  102         sc->oba_irq_rman.rm_type = RMAN_ARRAY;
  103         sc->oba_irq_rman.rm_descr = "OBIO IRQ";
  104 
  105         /* 
  106          * This module is intended for UART purposes only and
  107          * manages IRQs for UART0 and UART1.
  108          */
  109         if (rman_init(&sc->oba_irq_rman) != 0 ||
  110             rman_manage_region(&sc->oba_irq_rman, CVMX_IRQ_UART0, CVMX_IRQ_UART1) != 0)
  111                 panic("obio_attach: failed to set up IRQ rman");
  112 
  113         device_add_child(dev, "uart", 1);  /* Setup Uart-1 first. */
  114         device_add_child(dev, "uart", 0);  /* Uart-0 next. So it is first in console list */
  115         bus_generic_probe(dev);
  116         bus_generic_attach(dev);
  117         return (0);
  118 }
  119 
  120 static struct resource *
  121 obio_alloc_resource(device_t bus, device_t child, int type, int *rid,
  122     u_long start, u_long end, u_long count, u_int flags)
  123 {
  124         struct resource *rv;
  125         struct rman *rm;
  126         bus_space_tag_t bt = 0;
  127         bus_space_handle_t bh = 0;
  128         struct obio_softc *sc = device_get_softc(bus);
  129 
  130         switch (type) {
  131         case SYS_RES_IRQ:
  132                 switch (device_get_unit(child)) {
  133                 case 0:
  134                         start = end = CVMX_IRQ_UART0;
  135                         break;
  136                 case 1:
  137                         start = end = CVMX_IRQ_UART1;
  138                         break;
  139                 default:
  140                         return (NULL);
  141                 }
  142                 rm = &sc->oba_irq_rman;
  143                 break;
  144         case SYS_RES_MEMORY:
  145                 return (NULL);
  146         case SYS_RES_IOPORT:
  147                 rm = &sc->oba_rman;
  148                 bt = &octeon_uart_tag;
  149                 bh = CVMX_MIO_UARTX_RBR(device_get_unit(child));
  150                 start = bh;
  151                 break;
  152         default:
  153                 return (NULL);
  154         }
  155 
  156         rv = rman_reserve_resource(rm, start, end, count, flags, child);
  157         if (rv == NULL)  {
  158                 return (NULL);
  159         }
  160         if (type == SYS_RES_IRQ) {
  161                 return (rv);
  162         }
  163         rman_set_rid(rv, *rid);
  164         rman_set_bustag(rv, bt);
  165         rman_set_bushandle(rv, bh);
  166         
  167         if (0) {
  168                 if (bus_activate_resource(child, type, *rid, rv)) {
  169                         rman_release_resource(rv);
  170                         return (NULL);
  171                 }
  172         }
  173         return (rv);
  174 
  175 }
  176 
  177 static int
  178 obio_activate_resource(device_t bus, device_t child, int type, int rid,
  179     struct resource *r)
  180 {
  181         return (0);
  182 }
  183 static device_method_t obio_methods[] = {
  184         /* Device methods */
  185         DEVMETHOD(device_identify,      obio_identify),
  186         DEVMETHOD(device_probe,         obio_probe),
  187         DEVMETHOD(device_attach,        obio_attach),
  188 
  189         /* Bus methods */
  190         DEVMETHOD(bus_alloc_resource,   obio_alloc_resource),
  191         DEVMETHOD(bus_activate_resource,obio_activate_resource),
  192         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  193         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  194 
  195         DEVMETHOD(bus_add_child,        bus_generic_add_child),
  196 
  197         {0, 0},
  198 };
  199 
  200 static driver_t obio_driver = {
  201         "obio",
  202         obio_methods,
  203         sizeof(struct obio_softc),
  204 };
  205 static devclass_t obio_devclass;
  206 
  207 DRIVER_MODULE(obio, ciu, obio_driver, obio_devclass, 0, 0);

Cache object: e0abe55d77f06e0e3deaa602bb01ceb7


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