text: /*-
   * Copyright (c) 2006 Marcel Moolenaar
   * 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: soc2013/dpl/head/sys/dev/uart/uart_cpu_powerpc.c 209951 2010-07-11 21:08:29Z raj $");
  
  #include <sys/param.h>
  #include <sys/systm.h>
  #include <vm/vm.h>
  #include <vm/pmap.h>
  
  #include <machine/bus.h>
  #include <machine/ofw_machdep.h>
  
  #include <dev/ofw/openfirm.h>
  #include <dev/uart/uart.h>
  #include <dev/uart/uart_cpu.h>
  
  bus_space_tag_t uart_bus_space_io = &bs_le_tag;
  bus_space_tag_t uart_bus_space_mem = &bs_le_tag;
  
  int
  uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
  {
  
  	return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0);
  }
  
  static int
  ofw_get_uart_console(phandle_t opts, phandle_t *result, const char *inputdev,
      const char *outputdev)
  {
  	char buf[64];
  	phandle_t input;
  
  	if (OF_getprop(opts, inputdev, buf, sizeof(buf)) == -1)
  		return (ENXIO);
  	input = OF_finddevice(buf);
  	if (input == -1)
  		return (ENXIO);
  	if (OF_getprop(opts, outputdev, buf, sizeof(buf)) == -1)
  		return (ENXIO);
  	if (OF_finddevice(buf) != input)
  		return (ENXIO);
  
  	*result = input;
  	return (0);
  }
  
  int
  uart_cpu_getdev(int devtype, struct uart_devinfo *di)
  {
  	char buf[64];
  	struct uart_class *class;
  	phandle_t input, opts;
  	int error;
  
  	class = &uart_z8530_class;
  	if (class == NULL)
  		return (ENXIO);
  
  	if ((opts = OF_finddevice("/options")) == -1)
  		return (ENXIO);
  	switch (devtype) {
  	case UART_DEV_CONSOLE:
  		if (ofw_get_uart_console(opts, &input, "input-device",
  		    "output-device")) {
  			/*
  			 * At least some G5 Xserves require that we
  			 * probe input-device-1 as well
  			 */
  	
  			if (ofw_get_uart_console(opts, &input, "input-device-1",
  			    "output-device-1"))
  				return (ENXIO);
  		}
  		break;
  	case UART_DEV_DBGPORT:
  		if (!getenv_string("hw.uart.dbgport", buf, sizeof(buf)))
  			return (ENXIO);
  		input = OF_finddevice(buf);
  		if (input == -1)
  			return (ENXIO);
  		break;
  	default:
  		return (EINVAL);
  	}
  
  	if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1)
  		return (ENXIO);
  	if (strcmp(buf, "serial") != 0)
  		return (ENXIO);
  	if (OF_getprop(input, "name", buf, sizeof(buf)) == -1)
  		return (ENXIO);
  
  	if (strcmp(buf, "ch-a") == 0) {
  		class = &uart_z8530_class;
  		di->bas.regshft = 4;
  		di->bas.chan = 1;
  	} else if (strcmp(buf,"serial") == 0) {
  		class = &uart_ns8250_class;
  		di->bas.regshft = 0;
  		di->bas.chan = 0;
  	} else
  		return (ENXIO);
  
  	error = OF_decode_addr(input, 0, &di->bas.bst, &di->bas.bsh);
  	if (error)
  		return (error);
  
  	di->ops = uart_getops(class);
  
  	if (OF_getprop(input, "clock-frequency", &di->bas.rclk, 
  	    sizeof(di->bas.rclk)) == -1)
  		di->bas.rclk = 230400;
  	if (OF_getprop(input, "current-speed", &di->baudrate, 
  	    sizeof(di->baudrate)) == -1)
  		di->baudrate = 0;
  
  	di->databits = 8;
  	di->stopbits = 1;
  	di->parity = UART_PARITY_NONE;
  	return (0);
  }
  