/*      $NetBSD: irframe.c,v 1.46 2014/07/25 08:10:37 dholland Exp $    */

/*
 * Copyright (c) 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Lennart Augustsson (lennart@augustsson.net).
 *
 * 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: irframe.c,v 1.46 2014/07/25 08:10:37 dholland Exp $");

#include "irframe.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/malloc.h>
#include <sys/poll.h>
#include <sys/select.h>
#include <sys/vnode.h>

#include <dev/ir/ir.h>
#include <dev/ir/irdaio.h>
#include <dev/ir/irframevar.h>

#ifdef IRFRAME_DEBUG
#define DPRINTF(x)      if (irframedebug) printf x
#define Static
int irframedebug = 0;
#else
#define DPRINTF(x)
#define Static static
#endif

dev_type_open(irframeopen);
dev_type_close(irframeclose);
dev_type_read(irframeread);
dev_type_write(irframewrite);
dev_type_ioctl(irframeioctl);
dev_type_poll(irframepoll);
dev_type_kqfilter(irframekqfilter);

const struct cdevsw irframe_cdevsw = {
        .d_open = irframeopen,
        .d_close = irframeclose,
        .d_read = irframeread,
        .d_write = irframewrite,
        .d_ioctl = irframeioctl,
        .d_stop = nostop,
        .d_tty = notty,
        .d_poll = irframepoll,
        .d_mmap = nommap,
        .d_kqfilter = irframekqfilter,
        .d_discard = nodiscard,
        .d_flag = D_OTHER
};

int irframe_match(device_t parent, cfdata_t match, void *aux);

Static int irf_set_params(struct irframe_softc *sc, struct irda_params *p);
Static int irf_reset_params(struct irframe_softc *sc);

#if NIRFRAME == 0
/* In case we just have tty attachment. */
CFDRIVER_DECL(irframe, DV_DULL, NULL);
#endif

CFATTACH_DECL_NEW(irframe, sizeof(struct irframe_softc),
    irframe_match, irframe_attach, irframe_detach, NULL);

extern struct cfdriver irframe_cd;

#define IRFRAMEUNIT(dev) (minor(dev))

int
irframe_match(device_t parent, cfdata_t match, void *aux)
{
        struct ir_attach_args *ia = aux;

        return (ia->ia_type == IR_TYPE_IRFRAME);
}

void
irframe_attach(device_t parent, device_t self, void *aux)
{
        struct irframe_softc *sc = device_private(self);
        struct ir_attach_args *ia = aux;
        const char *delim;
        int speeds = 0;

        sc->sc_dev = self;
        sc->sc_methods = ia->ia_methods;
        sc->sc_handle = ia->ia_handle;

#ifdef DIAGNOSTIC
        if (sc->sc_methods->im_read == NULL ||
            sc->sc_methods->im_write == NULL ||
            sc->sc_methods->im_poll == NULL ||
            sc->sc_methods->im_kqfilter == NULL ||
            sc->sc_methods->im_set_params == NULL ||
            sc->sc_methods->im_get_speeds == NULL ||
            sc->sc_methods->im_get_turnarounds == NULL)
                panic("%s: missing methods", device_xname(self));
#endif

        (void)sc->sc_methods->im_get_speeds(sc->sc_handle, &speeds);
        sc->sc_speedmask = speeds;
        delim = ":";
        if (speeds & IRDA_SPEEDS_SIR) {
                printf("%s SIR", delim);
                delim = ",";
        }
        if (speeds & IRDA_SPEEDS_MIR) {
                printf("%s MIR", delim);
                delim = ",";
        }
        if (speeds & IRDA_SPEEDS_FIR) {
                printf("%s FIR", delim);
                delim = ",";
        }
        if (speeds & IRDA_SPEEDS_VFIR) {
                printf("%s VFIR", delim);
                delim = ",";
        }
        printf("\n");

        if (!pmf_device_register(self, NULL, NULL))
                aprint_error_dev(self, "couldn't establish power handler\n");
}

int
irframe_detach(device_t self, int flags)
{
        /*struct irframe_softc *sc = device_private(self);*/
        int maj, mn;

        pmf_device_deregister(self);

        /* XXX needs reference count */

        /* locate the major number */
        maj = cdevsw_lookup_major(&irframe_cdevsw);

        /* Nuke the vnodes for any open instances (calls close). */
        mn = device_unit(self);
        vdevgone(maj, mn, mn, VCHR);

        return (0);
}

int
irframeopen(dev_t dev, int flag, int mode, struct lwp *l)
{
        struct irframe_softc *sc;
        int error;

        sc = device_lookup_private(&irframe_cd, IRFRAMEUNIT(dev));
        if (sc == NULL)
                return (ENXIO);
        if (!device_is_active(sc->sc_dev))
                return (EIO);
        if (sc->sc_open)
                return (EBUSY);
        if (sc->sc_methods->im_open != NULL) {
                error = sc->sc_methods->im_open(sc->sc_handle, flag, mode, l);
                if (error)
                        return (error);
        }
        sc->sc_open = 1;
#ifdef DIAGNOSTIC
        sc->sc_speed = IRDA_DEFAULT_SPEED;
#endif
        (void)irf_reset_params(sc);
        return (0);
}

int
irframeclose(dev_t dev, int flag, int mode, struct lwp *l)
{
        struct irframe_softc *sc;
        int error;

        sc = device_lookup_private(&irframe_cd, IRFRAMEUNIT(dev));
        if (sc == NULL)
                return (ENXIO);
        sc->sc_open = 0;
        if (sc->sc_methods->im_close != NULL)
                error = sc->sc_methods->im_close(sc->sc_handle, flag, mode, l);
        else
                error = 0;
        return (error);
}

int
irframeread(dev_t dev, struct uio *uio, int flag)
{
        struct irframe_softc *sc;

        sc = device_lookup_private(&irframe_cd, IRFRAMEUNIT(dev));
        if (sc == NULL)
                return (ENXIO);
        if (!device_is_active(sc->sc_dev) || !sc->sc_open)
                return (EIO);
        if (uio->uio_resid < sc->sc_params.maxsize) {
#ifdef DIAGNOSTIC
                printf("irframeread: short read %ld < %d\n",
                       (long)uio->uio_resid, sc->sc_params.maxsize);
#endif
                return (EINVAL);
        }
        return (sc->sc_methods->im_read(sc->sc_handle, uio, flag));
}

int
irframewrite(dev_t dev, struct uio *uio, int flag)
{
        struct irframe_softc *sc;

        sc = device_lookup_private(&irframe_cd, IRFRAMEUNIT(dev));
        if (sc == NULL)
                return (ENXIO);
        if (!device_is_active(sc->sc_dev) || !sc->sc_open)
                return (EIO);
        if (uio->uio_resid > sc->sc_params.maxsize) {
#ifdef DIAGNOSTIC
                printf("irframeread: long write %ld > %d\n",
                       (long)uio->uio_resid, sc->sc_params.maxsize);
#endif
                return (EINVAL);
        }
        return (sc->sc_methods->im_write(sc->sc_handle, uio, flag));
}

int
irf_set_params(struct irframe_softc *sc, struct irda_params *p)
{
        int error;

        DPRINTF(("irf_set_params: set params speed=%u ebofs=%u maxsize=%u "
                 "speedmask=0x%x\n", p->speed, p->ebofs, p->maxsize,
                 sc->sc_speedmask));

        if (p->maxsize > IRDA_MAX_FRAME_SIZE) {
#ifdef IRFRAME_DEBUG
                printf("irf_set_params: bad maxsize=%u\n", p->maxsize);
#endif
                return (EINVAL);
        }

        if (p->ebofs > IRDA_MAX_EBOFS) {
#ifdef IRFRAME_DEBUG
                printf("irf_set_params: bad maxsize=%u\n", p->maxsize);
#endif
                return (EINVAL);
        }

#define CONC(x,y) x##y
#define CASE(s) case s: if (!(sc->sc_speedmask & CONC(IRDA_SPEED_,s))) return (EINVAL); break
        switch (p->speed) {
        CASE(2400);
        CASE(9600);
        CASE(19200);
        CASE(38400);
        CASE(57600);
        CASE(115200);
        CASE(576000);
        CASE(1152000);
        CASE(4000000);
        CASE(16000000);
        default: return (EINVAL);
        }
#undef CONC
#undef CASE

        error = sc->sc_methods->im_set_params(sc->sc_handle, p);
        if (!error) {
                sc->sc_params = *p;
                DPRINTF(("irf_set_params: ok\n"));
#ifdef DIAGNOSTIC
                if (p->speed != sc->sc_speed) {
                        sc->sc_speed = p->speed;
                        aprint_verbose_dev(sc->sc_dev, "set speed %u\n",
                               sc->sc_speed);
                }
#endif
        } else {
#ifdef IRFRAME_DEBUG
                printf("irf_set_params: error=%d\n", error);
#endif
        }
        return (error);
}

int
irf_reset_params(struct irframe_softc *sc)
{
        struct irda_params params;

        params.speed = IRDA_DEFAULT_SPEED;
        params.ebofs = IRDA_DEFAULT_EBOFS;
        params.maxsize = IRDA_DEFAULT_SIZE;
        return (irf_set_params(sc, &params));
}

int
irframeioctl(dev_t dev, u_long cmd, void *addr, int flag,
    struct lwp *l)
{
        struct irframe_softc *sc;
        void *vaddr = addr;
        int error;

        sc = device_lookup_private(&irframe_cd, IRFRAMEUNIT(dev));
        if (sc == NULL)
                return (ENXIO);
        if (!device_is_active(sc->sc_dev) || !sc->sc_open)
                return (EIO);

        switch (cmd) {
        case FIONBIO:
                /* All handled in the upper FS layer. */
                error = 0;
                break;

        case IRDA_SET_PARAMS:
                error = irf_set_params(sc, vaddr);
                break;

        case IRDA_RESET_PARAMS:
                error = irf_reset_params(sc);
                break;

        case IRDA_GET_SPEEDMASK:
                error = sc->sc_methods->im_get_speeds(sc->sc_handle, vaddr);
                break;

        case IRDA_GET_TURNAROUNDMASK:
                error = sc->sc_methods->im_get_turnarounds(sc->sc_handle,vaddr);
                break;

        default:
                error = EINVAL;
                break;
        }
        return (error);
}

int
irframepoll(dev_t dev, int events, struct lwp *l)
{
        struct irframe_softc *sc;

        sc = device_lookup_private(&irframe_cd, IRFRAMEUNIT(dev));
        if (sc == NULL)
                return (POLLHUP);
        if (!device_is_active(sc->sc_dev) || !sc->sc_open)
                return (POLLHUP);

        return (sc->sc_methods->im_poll(sc->sc_handle, events, l));
}

int
irframekqfilter(dev_t dev, struct knote *kn)
{
        struct irframe_softc *sc;

        sc = device_lookup_private(&irframe_cd, IRFRAMEUNIT(dev));
        if (!device_is_active(sc->sc_dev) || !sc->sc_open)
                return (1);

        return (sc->sc_methods->im_kqfilter(sc->sc_handle, kn));
}