/*      $NetBSD: ucb1200.c,v 1.21 2021/08/07 16:18:54 thorpej Exp $ */

/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by UCHIYAMA Yasushi.
*
* 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.
*/

/*
* Device driver for PHILIPS UCB1200 Advanced modem/audio analog front-end
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ucb1200.c,v 1.21 2021/08/07 16:18:54 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>

#include <machine/bus.h>
#include <machine/intr.h>

#include <hpcmips/tx/tx39var.h>
#include <hpcmips/tx/tx39sibvar.h>
#include <hpcmips/tx/tx39sibreg.h>

#include <hpcmips/dev/ucb1200var.h>
#include <hpcmips/dev/ucb1200reg.h>

#ifdef  UCB1200_DEBUG
#define DPRINTF_ENABLE
#define DPRINTF_DEBUG   ucb1200_debug
#endif
#include <machine/debug.h>

struct ucbchild_state {
       int (*cs_busy)(void *);
       void *cs_arg;
};

struct ucb1200_softc {
       device_t        sc_parent; /* parent (TX39 SIB module) */
       tx_chipset_tag_t sc_tc;

       int             sc_snd_rate; /* passed down from SIB module */
       int             sc_tel_rate;

       /* inquire child module state */
       struct ucbchild_state sc_child[UCB1200_MODULE_MAX];
};

int     ucb1200_match(device_t, cfdata_t, void *);
void    ucb1200_attach(device_t, device_t, void *);
int     ucb1200_print(void *, const char *);
int     ucb1200_search(device_t, cfdata_t, const int *, void *);
int     ucb1200_check_id(u_int16_t, int);

#ifdef UCB1200_DEBUG
void    ucb1200_dump(struct ucb1200_softc *);
#endif

CFATTACH_DECL_NEW(ucb, sizeof(struct ucb1200_softc),
   ucb1200_match, ucb1200_attach, NULL, NULL);

const struct ucb_id {
       u_int16_t       id;
       const char      *product;
} ucb_id[] = {
       { UCB1100_ID,   "PHILIPS UCB1100" },
       { UCB1200_ID,   "PHILIPS UCB1200" },
       { UCB1300_ID,   "PHILIPS UCB1300" },
       { TC35413F_ID,  "TOSHIBA TC35413F" },
       { 0, 0 }
};

int
ucb1200_match(device_t parent, cfdata_t cf, void *aux)
{
       struct txsib_attach_args *sa = aux;
       u_int16_t reg;

       if (sa->sa_slot != 0) /* UCB1200 must be subframe 0 */
               return (0);
       reg = txsibsf0_reg_read(sa->sa_tc, UCB1200_ID_REG);

       return (ucb1200_check_id(reg, 0));
}

void
ucb1200_attach(device_t parent, device_t self, void *aux)
{
       struct txsib_attach_args *sa = aux;
       struct ucb1200_softc *sc = device_private(self);
       u_int16_t reg;

       printf(": ");
       sc->sc_tc = sa->sa_tc;
       sc->sc_parent = parent;
       sc->sc_snd_rate = sa->sa_snd_rate;
       sc->sc_tel_rate = sa->sa_tel_rate;

       tx39sib_enable1(sc->sc_parent);
       tx39sib_enable2(sc->sc_parent);

#ifdef UCB1200_DEBUG
       if (ucb1200_debug)
               ucb1200_dump(sc);
#endif
       reg = txsibsf0_reg_read(sa->sa_tc, UCB1200_ID_REG);
       (void)ucb1200_check_id(reg, 1);
       printf("\n");

       config_search(self, NULL,
           CFARGS(.search = ucb1200_search));
}

int
ucb1200_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
{
       struct ucb1200_softc *sc = device_private(parent);
       struct ucb1200_attach_args ucba;

       ucba.ucba_tc = sc->sc_tc;
       ucba.ucba_snd_rate = sc->sc_snd_rate;
       ucba.ucba_tel_rate = sc->sc_tel_rate;
       ucba.ucba_sib      = sc->sc_parent;
       ucba.ucba_ucb      = parent;

       if (config_probe(parent, cf, &ucba))
               config_attach(parent, cf, &ucba, ucb1200_print, CFARGS_NONE);

       return (0);
}

int
ucb1200_print(void *aux, const char *pnp)
{

       return (pnp ? QUIET : UNCONF);
}

int
ucb1200_check_id(u_int16_t idreg, int print)
{
       int i;

       for (i = 0; ucb_id[i].product; i++) {
               if (ucb_id[i].id == idreg) {
                       if (print) {
                               printf("%s", ucb_id[i].product);
                       }

                       return (1);
               }
       }

       return (0);
}

void
ucb1200_state_install(device_t dev, int (*sfun)(void *), void *sarg,
   int sid)
{
       struct ucb1200_softc *sc = device_private(dev);

       sc->sc_child[sid].cs_busy = sfun;
       sc->sc_child[sid].cs_arg = sarg;
}

int
ucb1200_state_idle(device_t dev)
{
       struct ucb1200_softc *sc = device_private(dev);
       struct ucbchild_state *cs;
       int i;

       cs = sc->sc_child;
       for (i = 0; i < UCB1200_MODULE_MAX; i++, cs++)
               if (cs->cs_busy)
                       if ((*cs->cs_busy)(cs->cs_arg))
                               return (0);

       return (1); /* idle state */
}

#ifdef UCB1200_DEBUG
void
ucb1200_dump(struct ucb1200_softc *sc)
{
       static const char *const regname[] = {
               "IO_DATA        ",
               "IO_DIR         ",
               "POSINTEN       ",
               "NEGINTEN       ",
               "INTSTAT        ",
               "TELECOMCTRLA   ",
               "TELECOMCTRLB   ",
               "AUDIOCTRLA     ",
               "AUDIOCTRLB     ",
               "TOUCHSCREENCTRL",
               "ADCCTRL        ",
               "ADCDATA        ",
               "ID             ",
               "MODE           ",
               "RESERVED       ",
               "NULL           "
       };
       tx_chipset_tag_t tc;
       u_int16_t reg;
       int i;

       tc = sc->sc_tc;

       printf("\n\t[UCB1200 register]\n");
       for (i = 0; i < 16; i++) {
               reg = txsibsf0_reg_read(tc, i);
               printf("%s(%02d) 0x%04x ", regname[i], i, reg);
               dbg_bit_print(reg);
       }
}
#endif /* UCB1200_DEBUG */

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