usb/hubd/hubd.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */


/*
 * skeleton hub driver, the actual code is in hubdi.c
 * as it is shared between the root hub and the other hub instances
 */
#if defined(lint) && !defined(DEBUG)
#define DEBUG   1
#endif

#include <sys/usb/usba/usbai_version.h>
#include <sys/usb/usba.h>
#include <sys/usb/usba/hubdi.h>
#include <sys/usb/hubd/hub.h>
#include <sys/usb/hubd/hubdvar.h>

static int hubd_open(dev_t *devp, int flags, int otyp, cred_t *credp);
static int hubd_close(dev_t dev, int flag, int otyp, cred_t *credp);
static int hubd_ioctl(dev_t dev, int cmd, intptr_t arg, int mode,
    cred_t *credp, int *rvalp);
static int hubd_info(dev_info_t *dip, ddi_info_cmd_t infocmd,
    void *arg, void **result);
extern int usba_hubdi_power(dev_info_t *dip, int comp, int level);


static struct cb_ops hubd_cb_ops = {
    hubd_open,          /* open */
    hubd_close,         /* close */
    nodev,              /* strategy */
    nodev,              /* print */
    nodev,              /* dump */
    nodev,              /* read */
    nodev,              /* write */
    hubd_ioctl,         /* ioctl */
    nodev,              /* devmap */
    nodev,              /* mmap */
    nodev,              /* segmap */
    nochpoll,           /* poll */
    ddi_prop_op,            /* cb_prop_op */
    NULL,               /* streamtab */
    D_MP                /* Driver compatibility flag */
};

static struct dev_ops hubd_ops = {
    DEVO_REV,       /* devo_rev, */
    0,          /* refcnt  */
    hubd_info,      /* info */
    nulldev,        /* identify */
    nulldev,        /* probe */
    usba_hubdi_attach,  /* attach */
    usba_hubdi_detach,  /* detach */
    nodev,          /* reset */
    &hubd_cb_ops,       /* driver operations */
    &usba_hubdi_busops, /* bus operations */
    usba_hubdi_power,   /* power */
    ddi_quiesce_not_needed,     /* quiesce */
};

static struct modldrv modldrv = {
    &mod_driverops, /* Type of module. This one is a driver */
    "USB Hub Driver", /* Name of the module. */
    &hubd_ops,  /* driver ops */
};

static struct modlinkage modlinkage = {
    MODREV_1, (void *)&modldrv, NULL
};


extern void *hubd_statep;

int
_init(void)
{
    int rval;

    /* Initialize the soft state structures */
    if ((rval = ddi_soft_state_init(&hubd_statep,
        sizeof (hubd_t), HUBD_INITIAL_SOFT_SPACE)) != 0) {
        return (rval);
    }

    if ((rval = mod_install(&modlinkage)) != 0) {
        ddi_soft_state_fini(&hubd_statep);

        return (rval);
    }

    return (rval);
}


int
_fini(void)
{
    int rval = mod_remove(&modlinkage);
    if (rval == 0) {
        ddi_soft_state_fini(&hubd_statep);
    }

    return (rval);
}


int
_info(struct modinfo *modinfop)
{
    return (mod_info(&modlinkage, modinfop));
}


static dev_info_t *
hubd_get_dip(dev_t dev)
{
    minor_t minor = getminor(dev);
    int instance = (int)minor & ~HUBD_IS_ROOT_HUB;
    hubd_t *hubd = ddi_get_soft_state(hubd_statep, instance);

    if (hubd) {
        return (hubd->h_dip);
    } else {
        return (NULL);
    }
}

/*
 * info handler
 */
/*ARGSUSED*/
int
hubd_info(dev_info_t *dip, ddi_info_cmd_t infocmd,
    void *arg, void **result)
{
    dev_t dev;
    int instance;
    int error = DDI_FAILURE;

    switch (infocmd) {
    case DDI_INFO_DEVT2DEVINFO:
        *result = (void *)hubd_get_dip((dev_t)arg);
        if (*result != NULL) {
            error = DDI_SUCCESS;
        }
        break;
    case DDI_INFO_DEVT2INSTANCE:
        dev = (dev_t)arg;
        instance = HUBD_UNIT(dev);
        *result = (void *)(intptr_t)instance;
        error = DDI_SUCCESS;
        break;
    default:
        break;
    }
    return (error);
}

static int
hubd_open(dev_t *devp, int flags, int otyp, cred_t *credp)
{
    dev_info_t *dip = hubd_get_dip(*devp);

    return (usba_hubdi_open(dip, devp, flags, otyp, credp));
}


static int
hubd_close(dev_t dev, int flag, int otyp, cred_t *credp)
{
    dev_info_t *dip = hubd_get_dip(dev);

    return (usba_hubdi_close(dip, dev, flag, otyp, credp));
}


static int
hubd_ioctl(dev_t dev, int cmd, intptr_t arg, int mode,
    cred_t *credp, int *rvalp)
{
    dev_info_t *dip = hubd_get_dip(dev);

    return (usba_hubdi_ioctl(dip, dev, cmd, arg, mode,
        credp, rvalp));
}