text: /*-
   * Copyright (c) 2006 Benno Rice.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: release/9.1.0/sys/arm/xscale/pxa/uart_bus_pxa.c 179595 2008-06-06 05:08:09Z benno $");
  
  #include <sys/param.h>
  #include <sys/systm.h>
  #include <sys/bus.h>
  #include <sys/conf.h>
  #include <sys/kernel.h>
  #include <sys/module.h>
  #include <machine/bus.h>
  #include <sys/rman.h>
  #include <machine/resource.h>
  
  #include <dev/pci/pcivar.h>
  
  #include <dev/uart/uart.h>
  #include <dev/uart/uart_bus.h>
  #include <dev/uart/uart_cpu.h>
  
  #include <dev/ic/ns16550.h>
  
  #include <arm/xscale/pxa/pxavar.h>
  #include <arm/xscale/pxa/pxareg.h>
  
  #include "uart_if.h"
  
  #define	PXA_UART_UUE	0x40	/* UART Unit Enable */
  
  static int uart_pxa_probe(device_t dev);
  
  static device_method_t uart_pxa_methods[] = {
  	/* Device interface */
  	DEVMETHOD(device_probe,		uart_pxa_probe),
  	DEVMETHOD(device_attach,	uart_bus_attach),
  	DEVMETHOD(device_detach,	uart_bus_detach),
  	{ 0, 0 }
  };
  
  static driver_t uart_pxa_driver = {
  	uart_driver_name,
  	uart_pxa_methods,
  	sizeof(struct uart_softc),
  };
  
  static int
  uart_pxa_probe(device_t dev)
  {
  	bus_space_handle_t	base;
  	struct			uart_softc *sc;
  
  	/* Check to see if the enable bit's on. */
  	base = (bus_space_handle_t)pxa_get_base(dev);
  	if ((bus_space_read_4(obio_tag, base,
  	    (REG_IER << 2)) & PXA_UART_UUE) == 0)
  		return (ENXIO);
  
  	sc = device_get_softc(dev);
  	sc->sc_class = &uart_ns8250_class;
  
  	return(uart_bus_probe(dev, 2, PXA2X0_COM_FREQ, 0, 0));
  }
  
  DRIVER_MODULE(uart, pxa, uart_pxa_driver, uart_devclass, 0, 0);
  