text: /*
   * Copyright (c) 2003 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: src/sys/dev/uart/uart_cpu_sparc64.c,v 1.7 2003/11/11 06:52:04 jake Exp $");
  
  #include <sys/param.h>
  #include <sys/systm.h>
  
  #include <machine/bus.h>
  #include <machine/bus_private.h>
  
  #include <dev/ofw/openfirm.h>
  #include <machine/ofw_machdep.h>
  
  #include <dev/uart/uart.h>
  #include <dev/uart/uart_cpu.h>
  
  static phandle_t uart_cpu_getdev_keyboard(phandle_t root);
  
  static struct bus_space_tag bst_store[3];
  
  static int
  uart_cpu_channel(char *dev)
  {
  	char alias[64];
  	phandle_t aliases;
  	int len;
  
  	strcpy(alias, dev);
  	if ((aliases = OF_finddevice("/aliases")) != -1)
  		OF_getprop(aliases, dev, alias, sizeof(alias));
  	len = strlen(alias);
  	if (len < 2 || alias[len - 2] != ':' || alias[len - 1] < 'a' ||
  	    alias[len - 1] > 'b')
  		return (0);
  	return (alias[len - 1] - 'a' + 1);
  }
  
  int
  uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
  {
  
  	return ((b1->bsh == b2->bsh) ? 1 : 0);
  }
  
  static phandle_t
  uart_cpu_getdev_keyboard(phandle_t root)
  {
  	phandle_t child;
  	phandle_t node;
  	char buf[32];
  
  	for (child = OF_child(root); child != 0 && child != -1;
  	    child = OF_peer(child)) {
  		if (OF_getprop(child, "device_type", buf, sizeof(buf)) != -1 &&
  		    !strcmp(buf, "serial") &&
  		    OF_getprop(child, "keyboard", buf, sizeof(buf)) != -1)
  			return (child);
  		if ((node = uart_cpu_getdev_keyboard(child)) != -1)
  			return (node);
  	}
  	return (-1);
  }
  
  int
  uart_cpu_getdev(int devtype, struct uart_devinfo *di)
  {
  	char buf[32], dev[32], compat[32];
  	phandle_t input, options, output;
  	bus_addr_t addr;
  	int baud, bits, error, space, stop;
  	char flag, par;
  
  	/*
  	 * Get the address of the UART that is selected as the console, if
  	 * the console is an UART of course. Note that we enforce that both
  	 * stdin and stdout are selected. For weird configurations, use
  	 * ofw_console(4).
  	 * Note that the currently active console (ie /chosen/stdout and
  	 * /chosen/stdin) may not be the same as the device selected in the
  	 * environment (ie /options/output-device and /options/input-device)
  	 * because the user may have changed the environment. In that case
  	 * I would assume that the user expects that FreeBSD uses the new
  	 * console setting. There's choice choice, really.
  	 */
  	 if ((options = OF_finddevice("/options")) == -1)
  		 return (ENXIO);
  	if (devtype == UART_DEV_CONSOLE) {
  		if (OF_getprop(options, "input-device", dev, sizeof(dev)) == -1)
  			return (ENXIO);
  		if ((input = OF_finddevice(dev)) == -1)
  			return (ENXIO);
  		if (OF_getprop(input, "device_type", buf, sizeof(buf)) == -1)
  			return (ENXIO);
  		if (strcmp(buf, "serial"))
  			return (ENODEV);
  		if (OF_getprop(options, "output-device", buf, sizeof(buf))
  		    == -1)
  			return (ENXIO);
  		if ((output = OF_finddevice(buf)) == -1)
  			return (ENXIO);
  		if (input != output)
  			return (ENXIO);
  	} else if (devtype == UART_DEV_KEYBOARD) {
  		if ((input = uart_cpu_getdev_keyboard(OF_peer(0))) == -1)
  			return (ENXIO);
  	} else
  		return (ENODEV);
  
  	error = OF_decode_addr(input, &space, &addr);
  	if (error)
  		return (error);
  
  	/* Get the device class. */
  	if (OF_getprop(input, "name", buf, sizeof(buf)) == -1)
  		return (ENXIO);
  	if (OF_getprop(input, "compatible", compat, sizeof(compat)) == -1)
  		compat[0] = '\0';
  	di->bas.regshft = 0;
  	di->bas.rclk = 0;
  	if (!strcmp(buf, "se")) {
  		di->ops = uart_sab82532_ops;
  		di->bas.chan = uart_cpu_channel(dev);
  		addr += 64 * (di->bas.chan - 1);
  	} else if (!strcmp(buf, "zs")) {
  		di->ops = uart_z8530_ops;
  		di->bas.chan = uart_cpu_channel(dev);
  		di->bas.regshft = 1;
  		addr += 4 - 4 * (di->bas.chan - 1);
  	} else if (!strcmp(buf, "su") || !strcmp(buf, "su_pnp") ||
  	    !strcmp(compat, "su") || !strcmp(compat, "su16550")) {
  		di->ops = uart_ns8250_ops;
  		di->bas.chan = 0;
  	} else
  		return (ENXIO);
  
  	/* Fill in the device info. */
  	di->bas.bst = &bst_store[devtype];
  	di->bas.bsh = sparc64_fake_bustag(space, addr, di->bas.bst);
  
  	/* Get the line settings. */
  	if (devtype == UART_DEV_KEYBOARD)
  		di->baudrate = 1200;
  	else
  		di->baudrate = 9600;
  	di->databits = 8;
  	di->stopbits = 1;
  	di->parity = UART_PARITY_NONE;
  	snprintf(buf, sizeof(buf), "%s-mode", dev);
  	if (OF_getprop(options, buf, buf, sizeof(buf)) == -1)
  		return (0);
  	if (sscanf(buf, "%d,%d,%c,%d,%c", &baud, &bits, &par, &stop, &flag)
  	    != 5)
  		return (0);
  	di->baudrate = baud;
  	di->databits = bits;
  	di->stopbits = stop;
  	di->parity = (par == 'n') ? UART_PARITY_NONE :
  	    (par == 'o') ? UART_PARITY_ODD : UART_PARITY_EVEN;
  	return (0);
  }
  