uart_cpu_amd64.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 /*-
    2  * Copyright (c) 2003, 2004 Marcel Moolenaar
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  *
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/bus.h>
   33 
   34 #include <machine/bus.h>
   35 
   36 #include <dev/uart/uart.h>
   37 #include <dev/uart/uart_cpu.h>
   38 
   39 bus_space_tag_t uart_bus_space_io = AMD64_BUS_SPACE_IO;
   40 bus_space_tag_t uart_bus_space_mem = AMD64_BUS_SPACE_MEM;
   41 
   42 int
   43 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
   44 {
   45 
   46         return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
   47 }
   48 
   49 int
   50 uart_cpu_getdev(int devtype, struct uart_devinfo *di)
   51 {
   52         unsigned int i, ivar;
   53 
   54         /* Check the environment. */
   55         if (uart_getenv(devtype, di) == 0)
   56                 return (0);
   57 
   58         /*
   59          * Scan the hints. We only try units 0 to 3 (inclusive). This
   60          * covers the ISA legacy where 4 UARTs had their resources
   61          * predefined.
   62          */
   63         for (i = 0; i < 4; i++) {
   64                 if (resource_int_value("uart", i, "flags", &ivar))
   65                         continue;
   66                 if (devtype == UART_DEV_CONSOLE && !UART_FLAGS_CONSOLE(ivar))
   67                         continue;
   68                 if (devtype == UART_DEV_DBGPORT && !UART_FLAGS_DBGPORT(ivar))
   69                         continue;
   70                 /*
   71                  * We have a possible device. Make sure it's enabled and
   72                  * that we have an I/O port.
   73                  */
   74                 if (resource_int_value("uart", i, "disabled", &ivar) == 0 &&
   75                     ivar != 0)
   76                         continue;
   77                 if (resource_int_value("uart", i, "port", &ivar) != 0 ||
   78                     ivar == 0)
   79                         continue;
   80                 /*
   81                  * Got it. Fill in the instance and return it. We only have
   82                  * ns8250 and successors on i386.
   83                  */
   84                 di->ops = uart_ns8250_ops;
   85                 di->bas.chan = 0;
   86                 di->bas.bst = uart_bus_space_io;
   87                 if (bus_space_map(di->bas.bst, ivar, 8, 0, &di->bas.bsh) != 0)
   88                         continue;
   89                 di->bas.regshft = 0;
   90                 di->bas.rclk = 0;
   91                 if (resource_int_value("uart", i, "baud", &ivar) != 0)
   92                         ivar = 0;
   93                 di->baudrate = ivar;
   94                 di->databits = 8;
   95                 di->stopbits = 1;
   96                 di->parity = UART_PARITY_NONE;
   97                 return (0);
   98         }
   99 
  100         return (ENXIO);
  101 }
  102 
  103 void
  104 uart_cpu_identify(driver_t *driver, device_t parent)
  105 {
  106  
  107 }

Cache object: abb63a9e766210cea3ad1db18f531845

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/dev/uart/uart_cpu_amd64.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/uart/uart_cpu_amd64.c