uart_cpu_powerpc.c

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    1 /*-
    2  * Copyright (c) 2006 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: releng/8.4/sys/dev/uart/uart_cpu_powerpc.c 195831 2009-07-23 12:51:27Z nwhitehorn $");
   29 
   30 #include "opt_platform.h"
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <vm/vm.h>
   35 #include <vm/pmap.h>
   36 
   37 #include <machine/bus.h>
   38 
   39 #ifndef MPC85XX
   40 #include <dev/ofw/openfirm.h>
   41 #include <machine/ofw_machdep.h>
   42 #endif
   43 
   44 #include <dev/uart/uart.h>
   45 #include <dev/uart/uart_cpu.h>
   46 
   47 #ifdef MPC85XX
   48 bus_space_tag_t uart_bus_space_io = &bs_be_tag;
   49 bus_space_tag_t uart_bus_space_mem = &bs_be_tag;
   50 #else
   51 bus_space_tag_t uart_bus_space_io = &bs_le_tag;
   52 bus_space_tag_t uart_bus_space_mem = &bs_le_tag;
   53 #endif
   54 
   55 int
   56 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
   57 {
   58 #ifdef MPC85XX
   59         return ((b1->bsh == b2->bsh) ? 1 : 0);
   60 #else
   61         return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0);
   62 #endif
   63 }
   64 
   65 #ifdef MPC85XX
   66 int
   67 uart_cpu_getdev(int devtype, struct uart_devinfo *di)
   68 {
   69         struct uart_class *class;
   70 
   71         class = &uart_ns8250_class;
   72         if (class == NULL)
   73                 class = &uart_quicc_class;
   74         if (class == NULL)
   75                 return (ENXIO);
   76 
   77         /* Check the environment. */
   78         return (uart_getenv(devtype, di, class));
   79 }
   80 #else
   81 static int
   82 ofw_get_uart_console(phandle_t opts, phandle_t *result, const char *inputdev,
   83     const char *outputdev)
   84 {
   85         char buf[64];
   86         phandle_t input;
   87 
   88         if (OF_getprop(opts, inputdev, buf, sizeof(buf)) == -1)
   89                 return (ENXIO);
   90         input = OF_finddevice(buf);
   91         if (input == -1)
   92                 return (ENXIO);
   93         if (OF_getprop(opts, outputdev, buf, sizeof(buf)) == -1)
   94                 return (ENXIO);
   95         if (OF_finddevice(buf) != input)
   96                 return (ENXIO);
   97 
   98         *result = input;
   99         return (0);
  100 }
  101 
  102 int
  103 uart_cpu_getdev(int devtype, struct uart_devinfo *di)
  104 {
  105         char buf[64];
  106         struct uart_class *class;
  107         phandle_t input, opts;
  108         int error;
  109 
  110         class = &uart_z8530_class;
  111         if (class == NULL)
  112                 return (ENXIO);
  113 
  114         if ((opts = OF_finddevice("/options")) == -1)
  115                 return (ENXIO);
  116         switch (devtype) {
  117         case UART_DEV_CONSOLE:
  118                 if (ofw_get_uart_console(opts, &input, "input-device",
  119                     "output-device")) {
  120                         /*
  121                          * At least some G5 Xserves require that we
  122                          * probe input-device-1 as well
  123                          */
  124         
  125                         if (ofw_get_uart_console(opts, &input, "input-device-1",
  126                             "output-device-1"))
  127                                 return (ENXIO);
  128                 }
  129                 break;
  130         case UART_DEV_DBGPORT:
  131                 if (!getenv_string("hw.uart.dbgport", buf, sizeof(buf)))
  132                         return (ENXIO);
  133                 input = OF_finddevice(buf);
  134                 if (input == -1)
  135                         return (ENXIO);
  136                 break;
  137         default:
  138                 return (EINVAL);
  139         }
  140 
  141         if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1)
  142                 return (ENXIO);
  143         if (strcmp(buf, "serial") != 0)
  144                 return (ENXIO);
  145         if (OF_getprop(input, "name", buf, sizeof(buf)) == -1)
  146                 return (ENXIO);
  147 
  148         if (strcmp(buf, "ch-a") == 0) {
  149                 class = &uart_z8530_class;
  150                 di->bas.regshft = 4;
  151                 di->bas.chan = 1;
  152         } else if (strcmp(buf,"serial") == 0) {
  153                 class = &uart_ns8250_class;
  154                 di->bas.regshft = 0;
  155                 di->bas.chan = 0;
  156         } else
  157                 return (ENXIO);
  158 
  159         error = OF_decode_addr(input, 0, &di->bas.bst, &di->bas.bsh);
  160         if (error)
  161                 return (error);
  162 
  163         di->ops = uart_getops(class);
  164 
  165         if (OF_getprop(input, "clock-frequency", &di->bas.rclk, 
  166             sizeof(di->bas.rclk)) == -1)
  167                 di->bas.rclk = 230400;
  168         if (OF_getprop(input, "current-speed", &di->baudrate, 
  169             sizeof(di->baudrate)) == -1)
  170                 di->baudrate = 0;
  171 
  172         di->databits = 8;
  173         di->stopbits = 1;
  174         di->parity = UART_PARITY_NONE;
  175         return (0);
  176 }
  177 #endif

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

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