/* $NetBSD: ioc.c,v 1.14 2023/12/20 15:29:07 thorpej Exp $       */

/*
* Copyright (c) 2003 Christopher Sekiya
* 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. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*          This product includes software developed for the
*          NetBSD Project.  See http://www.NetBSD.org/ for
*          information about NetBSD.
* 4. 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.
*/

/*
* ip20/22/24 I/O Controller (IOC)
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ioc.c,v 1.14 2023/12/20 15:29:07 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/callout.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/syslog.h>

#include <uvm/uvm_extern.h>

#include <sys/bus.h>
#include <machine/cpu.h>
#include <machine/locore.h>
#include <machine/autoconf.h>
#include <machine/machtype.h>

#include <sgimips/ioc/iocreg.h>
#include <sgimips/ioc/iocvar.h>

#include "locators.h"

struct ioc_softc {
       bus_space_tag_t sc_iot;
       bus_space_handle_t sc_ioh;
};

static int      ioc_match(device_t, cfdata_t, void *);
static void     ioc_attach(device_t, device_t, void *);
#if defined(notyet)
static int      ioc_print(void *, const char *);
static int      ioc_search(device_t, cfdata_t, const int *, void *);
#endif

CFATTACH_DECL_NEW(ioc, sizeof(struct ioc_softc),
             ioc_match, ioc_attach, NULL, NULL);

#if defined(BLINK)
static callout_t ioc_blink_ch;
static void     ioc_blink(void *);
#endif

static int
ioc_match(device_t parent, cfdata_t match, void *aux)
{
       if (mach_type == MACH_SGI_IP22)
               return 1;

       return 0;
}

static void
ioc_attach(device_t parent, device_t self, void *aux)
{
       struct ioc_softc *sc = device_private(self);
       struct mainbus_attach_args *maa = aux;
       u_int32_t       sysid;

#ifdef BLINK
       callout_init(&ioc_blink_ch, 0);
#endif

       sc->sc_iot = normal_memt;

       if (bus_space_map(sc->sc_iot, maa->ma_addr, 0x100,
                         BUS_SPACE_MAP_LINEAR, &sc->sc_ioh))
               panic("ioc_attach: could not allocate memory\n");

       sysid = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IOC_SYSID) & 0x01;

       if (sysid)
               mach_subtype = MACH_SGI_IP22_FULLHOUSE;
       else
               mach_subtype = MACH_SGI_IP22_GUINNESS;

       aprint_normal(": rev %d, machine %s, board rev %d\n",
                  ((sysid & IOC_SYSID_CHIPREV) >> IOC_SYSID_CHIPREV_SHIFT),
                   (sysid & IOC_SYSID_SYSTYPE) ? "Indigo2 (Fullhouse)" :
                   "Indy (Guinness)",
                  ((sysid & IOC_SYSID_BOARDREV) >> IOC_SYSID_BOARDREV_SHIFT));

       /* Reset IOC */
       bus_space_write_4(sc->sc_iot, sc->sc_ioh, IOC_RESET,
                         IOC_RESET_PARALLEL | IOC_RESET_PCKBC |
                         IOC_RESET_EISA | IOC_RESET_ISDN |
                         IOC_RESET_LED_GREEN );

       /*
        * Set the 10BaseT port to use UTP cable, set autoselect mode for
        * the ethernet interface (AUI vs. TP), set the two serial ports
        * to PC mode.
        */
       bus_space_write_4(sc->sc_iot, sc->sc_ioh, IOC_WRITE,
                         IOC_WRITE_ENET_AUTO | IOC_WRITE_ENET_UTP |
                         IOC_WRITE_PC_UART2 | IOC_WRITE_PC_UART1);

/* XXX: the firmware should have taken care of this already */
#if 0
       if (mach_subtype == MACH_SGI_IP22_GUINNESS) {
               bus_space_write_4(sc->sc_iot, sc->sc_ioh, IOC_GCSEL, 0xff);
               bus_space_write_4(sc->sc_iot, sc->sc_ioh, IOC_GCREG, 0xff);
       }
#endif

#if defined(BLINK)
       ioc_blink(sc);
#endif

#if defined(notyet)
       /*
        * pckbc, zstty, and lpt should attach under the IOC.  This begs the
        * question of how we sort things out with ip20, which has no IOC.
        * For now, we pretend that everything attaches at HPC and ignore
        * the IOC.
        */

       config_search(self, NULL,
           CFARGS(.search = ioc_search));
#endif
}

#if defined(notyet)
static int
ioc_print(void *aux, const char *pnp)
{
       struct ioc_attach_args *iaa = aux;

       if (pnp != 0)
               return QUIET;

       if (iaa->iaa_offset != IOCCF_OFFSET_DEFAULT)
               aprint_normal(" offset 0x%lx", iaa->iaa_offset);
       if (iaa->iaa_intr != IOCCF_INTR_DEFAULT)
               aprint_normal(" intr %d", iaa->iaa_intr);

       return UNCONF;
}

static int
ioc_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
{
       struct ioc_softc *sc = device_private(parent);
       struct ioc_attach_args iaa;
       int             tryagain;

       do {
               iaa.iaa_offset = cf->cf_loc[IOCCF_OFFSET];
               iaa.iaa_intr = cf->cf_loc[IOCCF_INTR];
               iaa.iaa_st = normal_memt;
               iaa.iaa_sh = sc->sc_ioh;        /* XXX */

               tryagain = 0;
               if (config_probe(parent, cf, &iaa)) {
                       config_attach(parent, cf, &iaa, ioc_print, CFARGS_NONE);
                       tryagain = (cf->cf_fstate == FSTATE_STAR);
               }
       } while (tryagain);

       return 0;
}
#endif

#if defined(BLINK)
static void
ioc_blink(void *self)
{
       struct ioc_softc *sc = device_private(self);
       register int    s;
       int             value;

       s = splhigh();

       /* This is a bit odd.  To strobe the green LED, we have to toggle the
          red control bit. */

       value = bus_space_read_4(sc->sc_iot, sc->sc_ioh, IOC_RESET) & 0xff;
       value ^= IOC_RESET_LED_RED;
       bus_space_write_4(sc->sc_iot, sc->sc_ioh, IOC_RESET, value);
       splx(s);
       /*
        * Blink rate is:
        *      full cycle every second if completely idle (loadav = 0)
        *      full cycle every 2 seconds if loadav = 1
        *      full cycle every 3 seconds if loadav = 2
        * etc.
        */
       s = (((averunnable.ldavg[0] + FSCALE) * hz) >> (FSHIFT + 1));
       callout_reset(&ioc_blink_ch, s, ioc_blink, sc);

}
#endif

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