/*      $NetBSD: consinit.c,v 1.9 2012/08/10 14:52:26 tsutsui Exp $     */

/*-
 * Copyright (c) 2001 Matthew Fredette
 * Copyright (c) 1999 Eduardo E. Horvath
 * 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * 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>
__KERNEL_RCSID(0, "$NetBSD: consinit.c,v 1.9 2012/08/10 14:52:26 tsutsui Exp $");

#include "opt_ddb.h"
#include "opt_kgdb.h"
#include "pcons.h"
#include "kbd.h"
#include "zs.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/tty.h>
#include <sys/time.h>
#include <sys/syslog.h>
#include <sys/kgdb.h>

#include <machine/autoconf.h>
#include <machine/promlib.h>
#include <machine/cpu.h>
#include <machine/eeprom.h>
#include <machine/psl.h>
#include <machine/z8530var.h>

#include <dev/cons.h>

#include <sun2/dev/cons.h>

static void prom_cnprobe(struct consdev *);
static void prom_cninit(struct consdev *);
int  prom_cngetc(dev_t);
static void prom_cnputc(dev_t, int);
static void prom_cnpollc(dev_t, int);
static void prom_cnputc(dev_t, int);

#ifdef  PROM_OBP_V2
/*    
 * The following several variables are related to
 * the configuration process, and are used in initializing 
 * the machine.
 */     
int     prom_stdin_node;        /* node ID of ROM's console input device */
int     prom_stdout_node;       /* node ID of ROM's console output device */
char    prom_stdin_args[16];
char    prom_stdout_args[16];
#endif  /* PROM_OBP_V2 */

/*
 * The console is set to this one initially,
 * which lets us use the PROM until consinit()
 * is called to select a real console.
 */
struct consdev consdev_prom = {
        prom_cnprobe,
        prom_cninit,
        prom_cngetc,
        prom_cnputc,
        prom_cnpollc,
        NULL,
};

void 
prom_cnprobe(struct consdev *cd)
{
#if NPCONS > 0
        extern const struct cdevsw pcons_cdevsw;

        cd->cn_dev = makedev(cdevsw_lookup_major(&pcons_cdevsw), 0);
        cd->cn_pri = CN_INTERNAL;
#endif
}

int 
prom_cngetc(dev_t dev)
{
        int ch;
#ifdef DDB
        static int nplus = 0;
#endif
        
        ch = prom_getchar();
#ifdef DDB
        if (ch == '+') {
                if (nplus++ > 3) Debugger();
        } else nplus = 0;
#endif
        return ch;
}

static void 
prom_cninit(struct consdev *cn)
{
}

/*
 * PROM console output putchar.
 */
static void 
prom_cnputc(dev_t dev, int c)
{
        int s;

        s = splhigh();
        prom_putchar(c);
        splx(s);
}

void 
prom_cnpollc(dev_t dev, int on)
{
        if (on) {
                /* Entering debugger. */
#if NFB > 0
                fb_unblank();
#endif  
        } else {
                /* Resuming kernel. */
        }
#if NPCONS > 0
        pcons_cnpollc(dev, on);
#endif  
}

/*****************************************************************/

#ifdef  DEBUG
#define DBPRINT(x)      prom_printf x
#else
#define DBPRINT(x)
#endif

#ifdef notyet /* PROM_OBP_V2 */
void 
prom_get_device_args(const char *prop, char *dev, unsigned int dev_sz,
    char *args, unsigned int args_sz)
{
        char *cp, buffer[128];
                
        getpropstringA(prom_findroot(), (char *)prop, buffer, sizeof buffer);
        
        /*
        * Extract device-specific arguments from a PROM device path (if any)
        */
        cp = buffer + strlen(buffer);
        while (cp >= buffer) {
                if (*cp == ':') {
                        strncpy(args, cp+1, args_sz);
                        *cp = '\0';
                        strncpy(dev, buffer, dev_sz);
                        break;
                }
                cp--;
        }
}
#endif  /* PROM_OBP_V2 */

/*
 * This function replaces sys/dev/cninit.c
 * Determine which device is the console using
 * the PROM "input source" and "output sink".
 */
void 
consinit(void)
{
#ifdef  notyet /* PROM_OBP_V2 */
        char buffer[128];
#endif  /* PROM_OBP_V2 */
        const char *consname = "unknown";
#if KGDB
#if NZS > 0
        extern const struct cdevsw zstty_cdevsw;
#endif
#endif
        
        DBPRINT(("consinit()\r\n"));
        if (cn_tab != &consdev_prom) return;

        switch(prom_version()) {
#ifdef  PROM_OLDMON
        case PROM_OLDMON:
        case PROM_OBP_V0:
                switch(prom_stdin()) {
                case PROMDEV_KBD:
                        consname = "keyboard/display";
                        break;
                case PROMDEV_TTYA:
                        consname = "ttya";
                        break;
                case PROMDEV_TTYB:
                        consname = "ttyb";
                        break;
                }
                break;
#endif  /* PROM_OLDMON */
        
#ifdef  notyet /* PROM_OBP_V2 */
        case PROM_OBP_V2:
        case PROM_OBP_V3:
        case PROM_OPENFIRM:
        
                /* Save PROM arguments for device matching */
                prom_get_device_args("stdin-path", 
                                     buffer, 
                                     sizeof(buffer),
                                     prom_stdin_args,
                                     sizeof(prom_stdin_args));
                prom_get_device_args("stdout-path",
                                     buffer,
                                     sizeof(buffer),
                                     prom_stdout_args,
                                     sizeof(prom_stdout_args));

                /*
                 * Translate the STDIO package instance (`ihandle') -- that
                 * the PROM has already opened for us -- to a device tree
                 * node (i.e. a `phandle'). 
                 */
                DBPRINT(("stdin instance = %x\r\n", prom_stdin()));
                if ((prom_stdin_node = prom_instance_to_package(prom_stdin())) == 0) {
                        printf("WARNING: no PROM stdin\n");
                } 
                DBPRINT(("stdin package = %x\r\n", prom_stdin_node));
                
                DBPRINT(("stdout instance = %x\r\n", prom_stdout()));
                if ((prom_stdout_node = prom_instance_to_package(prom_stdout())) == 0) {
                        printf("WARNING: no PROM stdout\n");
                }
                DBPRINT(("stdout package = %x\r\n", prom_stdout_node));
                DBPRINT(("buffer @ %p\r\n", buffer));
        
                if (prom_stdin_node && prom_node_has_property(prom_stdin_node, "keyboard")) {
#if NKBD == 0           
                        printf("cninit: kdb/display not configured\n");
#endif
                        consname = "keyboard/display";
                } else if (prom_stdout_node)
                        consname = buffer;
#endif  /* PROM_OBP_V2 */
        }
        printf("console is %s\n", consname);
 
        /* Initialize PROM console */
        (*cn_tab->cn_probe)(cn_tab);
        (*cn_tab->cn_init)(cn_tab);

#ifdef  KGDB
        /* Set up KGDB */
#if NZS > 0
        if (cdevsw_lookup(kgdb_dev) == &zstty_cdevsw)
                zs_kgdb_init();
#endif  /* NZS > 0 */
#endif  /* KGDB */
}