uart_bus_puc.c

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    1 /*-
    2  * Copyright (c) 2002 JF Hay.  All rights reserved.
    3  * Copyright (c) 2001 M. Warner Losh.  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  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   24  */
   25 
   26 #include <sys/cdefs.h>
   27 __FBSDID("$FreeBSD$");
   28 
   29 #include <sys/param.h>
   30 #include <sys/systm.h>
   31 #include <sys/bus.h>
   32 #include <sys/conf.h>
   33 #include <sys/kernel.h>
   34 #include <sys/module.h>
   35 #include <machine/bus.h>
   36 #include <sys/rman.h>
   37 #include <machine/resource.h>
   38 
   39 #include <dev/pci/pcivar.h>
   40 #include <dev/puc/pucvar.h>
   41 
   42 #include <dev/uart/uart.h>
   43 #include <dev/uart/uart_bus.h>
   44 
   45 static int uart_puc_probe(device_t dev);
   46 
   47 static device_method_t uart_puc_methods[] = {
   48         /* Device interface */
   49         DEVMETHOD(device_probe,         uart_puc_probe),
   50         DEVMETHOD(device_attach,        uart_bus_attach),
   51         DEVMETHOD(device_detach,        uart_bus_detach),
   52         { 0, 0 }
   53 };
   54 
   55 static driver_t uart_puc_driver = {
   56         uart_driver_name,
   57         uart_puc_methods,
   58         sizeof(struct uart_softc),
   59 };
   60 
   61 static int
   62 uart_puc_probe(device_t dev)
   63 {
   64         device_t parent;
   65         struct uart_softc *sc;
   66         uintptr_t port, rclk, regshft, type;
   67 
   68         parent = device_get_parent(dev);
   69         sc = device_get_softc(dev);
   70 
   71         if (BUS_READ_IVAR(parent, dev, PUC_IVAR_SUBTYPE, &type))
   72                 return (ENXIO);
   73         switch (type) {
   74         case PUC_PORT_UART_NS8250:
   75                 sc->sc_class = &uart_ns8250_class;
   76                 port = 0;
   77                 break;
   78         case PUC_PORT_UART_SAB82532:
   79                 sc->sc_class = &uart_sab82532_class;
   80                 if (BUS_READ_IVAR(parent, dev, PUC_IVAR_PORT, &port))
   81                         port = 0;
   82                 break;
   83         case PUC_PORT_UART_Z8530:
   84                 sc->sc_class = &uart_z8530_class;
   85                 if (BUS_READ_IVAR(parent, dev, PUC_IVAR_PORT, &port))
   86                         port = 0;
   87                 break;
   88         default:
   89                 return (ENXIO);
   90         }
   91 
   92         if (BUS_READ_IVAR(parent, dev, PUC_IVAR_FREQ, &rclk))
   93                 rclk = 0;
   94         if (BUS_READ_IVAR(parent, dev, PUC_IVAR_REGSHFT, &regshft))
   95                 regshft = 0;
   96         return (uart_bus_probe(dev, regshft, rclk, 0, port));
   97 }
   98 
   99 DRIVER_MODULE(uart, puc, uart_puc_driver, uart_devclass, 0, 0);

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

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