/*      $NetBSD: clmpcc_pcctwo.c,v 1.20 2014/03/25 15:52:16 christos Exp $      */

/*-
* Copyright (c) 1999, 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Steve C. Woodford.
*
* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/

/*
* Cirrus Logic CD2401 4-channel serial chip. PCCchip2 Front-end.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: clmpcc_pcctwo.c,v 1.20 2014/03/25 15:52:16 christos Exp $");

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

#include <dev/cons.h>

#include <sys/cpu.h>
#include <sys/bus.h>
#include <sys/intr.h>

#include <dev/ic/clmpccvar.h>

#include <dev/mvme/pcctwovar.h>
#include <dev/mvme/pcctworeg.h>

/* XXXXSCW: Fixme */
#ifdef MVME68K
#include <mvme68k/dev/mainbus.h>
#else
#error Need consiack hook
#endif


/* Definition of the driver for autoconfig. */
int clmpcc_pcctwo_match(device_t, cfdata_t, void *);
void clmpcc_pcctwo_attach(device_t, device_t, void *);
void clmpcc_pcctwo_iackhook(struct clmpcc_softc *, int);
void clmpcc_pcctwo_consiackhook(struct clmpcc_softc *, int);

CFATTACH_DECL_NEW(clmpcc_pcctwo, sizeof(struct clmpcc_softc),
   clmpcc_pcctwo_match, clmpcc_pcctwo_attach, NULL, NULL);

extern struct cfdriver clmpcc_cd;

extern const struct cdevsw clmpcc_cdevsw;

/*
* For clmpcccn*()
*/
cons_decl(clmpcc);


/*
* Is the CD2401 chip present?
*/
int
clmpcc_pcctwo_match(device_t parent, cfdata_t cf, void *aux)
{
       struct pcctwo_attach_args *pa;

       pa = aux;

       if (strcmp(pa->pa_name, clmpcc_cd.cd_name))
               return (0);

       pa->pa_ipl = cf->pcctwocf_ipl;

       return (1);
}

/*
* Attach a found CD2401.
*/
void
clmpcc_pcctwo_attach(device_t parent, device_t self, void *aux)
{
       struct clmpcc_softc *sc;
       struct pcctwo_attach_args *pa = aux;
       int level = pa->pa_ipl;

       sc = device_private(self);
       sc->sc_dev = self;
       level = pa->pa_ipl;
       sc->sc_iot = pa->pa_bust;
       bus_space_map(pa->pa_bust, pa->pa_offset, 0x100, 0, &sc->sc_ioh);

       sc->sc_clk = 20000000;
       sc->sc_byteswap = CLMPCC_BYTESWAP_LOW;
       sc->sc_swaprtsdtr = 1;
       sc->sc_iackhook = clmpcc_pcctwo_iackhook;
       sc->sc_vector_base = PCCTWO_SCC_VECBASE;
       sc->sc_rpilr = 0x03;
       sc->sc_tpilr = 0x02;
       sc->sc_mpilr = 0x01;
       sc->sc_evcnt = pcctwointr_evcnt(level);

       /* Do common parts of CD2401 configuration. */
       clmpcc_attach(sc);

       /* Hook the interrupts */
       pcctwointr_establish(PCCTWOV_SCC_RX, clmpcc_rxintr, level, sc, NULL);
       pcctwointr_establish(PCCTWOV_SCC_RX_EXCEP, clmpcc_rxintr, level, sc,
           NULL);
       pcctwointr_establish(PCCTWOV_SCC_TX, clmpcc_txintr, level, sc, NULL);
       pcctwointr_establish(PCCTWOV_SCC_MODEM, clmpcc_mdintr, level, sc, NULL);
}

void
clmpcc_pcctwo_iackhook(struct clmpcc_softc *sc, int which)
{
       bus_size_t offset;
       volatile u_char foo;

       switch (which) {
       case CLMPCC_IACK_MODEM:
               offset = PCC2REG_SCC_MODEM_PIACK;
               break;

       case CLMPCC_IACK_RX:
               offset = PCC2REG_SCC_RX_PIACK;
               break;

       case CLMPCC_IACK_TX:
               offset = PCC2REG_SCC_TX_PIACK;
               break;
       default:
#ifdef DEBUG
               printf("%s: Invalid IACK number '%d'\n",
                   device_xname(sc->sc_dev), which);
#endif
               panic("clmpcc_pcctwo_iackhook %d", which);
       }

       foo = pcc2_reg_read(sys_pcctwo, offset);
       __USE(foo);
}

/*
* This routine is only used prior to clmpcc_attach() being called
*/
void
clmpcc_pcctwo_consiackhook(struct clmpcc_softc *sc, int which)
{
       bus_space_handle_t bush;
       bus_size_t offset;
       volatile u_char foo;

       switch (which) {
       case CLMPCC_IACK_MODEM:
               offset = PCC2REG_SCC_MODEM_PIACK;
               break;

       case CLMPCC_IACK_RX:
               offset = PCC2REG_SCC_RX_PIACK;
               break;

       case CLMPCC_IACK_TX:
               offset = PCC2REG_SCC_TX_PIACK;
               break;
       default:
#ifdef DEBUG
               printf("%s: Invalid IACK number '%d'\n",
                   device_xname(sc->sc_dev), which);
               panic("clmpcc_pcctwo_consiackhook");
#endif
               panic("clmpcc_pcctwo_iackhook %d", which);
       }

#ifdef MVME68K
       /*
        * We need to fake the tag and handle since 'sys_pcctwo' will
        * be NULL during early system startup...
        */
       bush = (bus_space_handle_t) & (intiobase[MAINBUS_PCCTWO_OFFSET +
               PCCTWO_REG_OFF]);

       foo = bus_space_read_1(&_mainbus_space_tag, bush, offset);
       __USE(foo);
#else
#error Need consiack hook
#endif
}


/****************************************************************
* Console support functions (MVME PCCchip2 specific!)
****************************************************************/

/*
* Check for CD2401 console.
*/
void
clmpcccnprobe(struct consdev *cp)
{
       int maj;

#if defined(MVME68K)
       if (machineid != MVME_167 && machineid != MVME_177)
#elif defined(MVME88K)
       if (machineid != MVME_187)
#endif
       {
               cp->cn_pri = CN_DEAD;
               return;
       }

       /*
        * Locate the major number
        */
       maj = cdevsw_lookup_major(&clmpcc_cdevsw);

       /* Initialize required fields. */
       cp->cn_dev = makedev(maj, 0);
       cp->cn_pri = CN_NORMAL;
}

void
clmpcccninit(struct consdev *cp)
{
       static struct clmpcc_softc cons_sc;

       cons_sc.sc_iot = &_mainbus_space_tag;
       bus_space_map(&_mainbus_space_tag,
           intiobase_phys + MAINBUS_PCCTWO_OFFSET + PCCTWO_SCC_OFF,
           PCC2REG_SIZE, 0, &cons_sc.sc_ioh);
       cons_sc.sc_clk = 20000000;
       cons_sc.sc_byteswap = CLMPCC_BYTESWAP_LOW;
       cons_sc.sc_swaprtsdtr = 1;
       cons_sc.sc_iackhook = clmpcc_pcctwo_consiackhook;
       cons_sc.sc_vector_base = PCCTWO_SCC_VECBASE;
       cons_sc.sc_rpilr = 0x03;
       cons_sc.sc_tpilr = 0x02;
       cons_sc.sc_mpilr = 0x01;

       clmpcc_cnattach(&cons_sc, 0, 9600);
}

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