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NetBSD/sys/dev/bluetooth/bthidev.c

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/* $NetBSD: bthidev.c,v 1.30 2017/12/10 17:03:07 bouyer Exp $ */
/*-
* Copyright (c) 2006 Itronix Inc.
* All rights reserved.
*
* Written by Iain Hibbert for Itronix Inc.
*
* 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. The name of Itronix Inc. may not be used to endorse
* or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``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 ITRONIX INC. 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: bthidev.c,v 1.30 2017/12/10 17:03:07 bouyer Exp $");
#include <sys/param.h>
#include <sys/condvar.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/fcntl.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/queue.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/socketvar.h>
#include <sys/systm.h>
#include <prop/proplib.h>
#include <netbt/bluetooth.h>
#include <netbt/l2cap.h>
#include <dev/hid/hid.h>
#include <dev/bluetooth/btdev.h>
#include <dev/bluetooth/bthid.h>
#include <dev/bluetooth/bthidev.h>
#include "locators.h"
/*****************************************************************************
*
* Bluetooth HID device
*/
#define MAX_DESCRIPTOR_LEN 1024 /* sanity check */
/* bthidev softc */
struct bthidev_softc {
uint16_t sc_state;
uint16_t sc_flags;
device_t sc_dev;
bdaddr_t sc_laddr; /* local address */
bdaddr_t sc_raddr; /* remote address */
struct sockopt sc_mode; /* link mode sockopt */
uint16_t sc_ctlpsm; /* control PSM */
struct l2cap_channel *sc_ctl; /* control channel */
struct l2cap_channel *sc_ctl_l; /* control listen */
uint16_t sc_intpsm; /* interrupt PSM */
struct l2cap_channel *sc_int; /* interrupt channel */
struct l2cap_channel *sc_int_l; /* interrupt listen */
MBUFQ_HEAD() sc_inq; /* input queue */
kmutex_t sc_lock; /* input queue lock */
kcondvar_t sc_cv; /* input queue trigger */
lwp_t *sc_lwp; /* input queue processor */
int sc_detach;
LIST_HEAD(,bthidev) sc_list; /* child list */
callout_t sc_reconnect;
int sc_attempts; /* connection attempts */
};
/* sc_flags */
#define BTHID_RECONNECT (1 << 0) /* reconnect on link loss */
#define BTHID_CONNECTING (1 << 1) /* we are connecting */
/* device state */
#define BTHID_CLOSED 0
#define BTHID_WAIT_CTL 1
#define BTHID_WAIT_INT 2
#define BTHID_OPEN 3
#define BTHID_RETRY_INTERVAL 5 /* seconds between connection attempts */
/* bthidev internals */
static void bthidev_timeout(void *);
static int bthidev_listen(struct bthidev_softc *);
static int bthidev_connect(struct bthidev_softc *);
static int bthidev_output(struct bthidev *, uint8_t *, int);
static void bthidev_null(struct bthidev *, uint8_t *, int);
static void bthidev_process(void *);
static void bthidev_process_one(struct bthidev_softc *, struct mbuf *);
/* autoconf(9) glue */
static int bthidev_match(device_t, cfdata_t, void *);
static void bthidev_attach(device_t, device_t, void *);
static int bthidev_detach(device_t, int);
static int bthidev_print(void *, const char *);
CFATTACH_DECL_NEW(bthidev, sizeof(struct bthidev_softc),
bthidev_match, bthidev_attach, bthidev_detach, NULL);
/* bluetooth(9) protocol methods for L2CAP */
static void bthidev_connecting(void *);
static void bthidev_ctl_connected(void *);
static void bthidev_int_connected(void *);
static void bthidev_ctl_disconnected(void *, int);
static void bthidev_int_disconnected(void *, int);
static void *bthidev_ctl_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *);
static void *bthidev_int_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *);
static void bthidev_complete(void *, int);
static void bthidev_linkmode(void *, int);
static void bthidev_input(void *, struct mbuf *);
static const struct btproto bthidev_ctl_proto = {
bthidev_connecting,
bthidev_ctl_connected,
bthidev_ctl_disconnected,
bthidev_ctl_newconn,
bthidev_complete,
bthidev_linkmode,
bthidev_input,
};
static const struct btproto bthidev_int_proto = {
bthidev_connecting,
bthidev_int_connected,
bthidev_int_disconnected,
bthidev_int_newconn,
bthidev_complete,
bthidev_linkmode,
bthidev_input,
};
/*****************************************************************************
*
* bthidev autoconf(9) routines
*/
static int
bthidev_match(device_t self, cfdata_t cfdata, void *aux)
{
prop_dictionary_t dict = aux;
prop_object_t obj;
obj = prop_dictionary_get(dict, BTDEVservice);
if (prop_string_equals_cstring(obj, "HID"))
return 1;
return 0;
}
static void
bthidev_attach(device_t parent, device_t self, void *aux)
{
struct bthidev_softc *sc = device_private(self);
prop_dictionary_t dict = aux;
prop_object_t obj;
device_t dev;
struct bthidev_attach_args bha;
struct bthidev *hidev;
struct hid_data *d;
struct hid_item h;
const void *desc;
int locs[BTHIDBUSCF_NLOCS];
int maxid, rep, dlen;
int vendor, product;
int err;
/*
* Init softc
*/
sc->sc_dev = self;
LIST_INIT(&sc->sc_list);
MBUFQ_INIT(&sc->sc_inq);
callout_init(&sc->sc_reconnect, 0);
callout_setfunc(&sc->sc_reconnect, bthidev_timeout, sc);
sc->sc_state = BTHID_CLOSED;
sc->sc_flags = BTHID_CONNECTING;
sc->sc_ctlpsm = L2CAP_PSM_HID_CNTL;
sc->sc_intpsm = L2CAP_PSM_HID_INTR;
sockopt_init(&sc->sc_mode, BTPROTO_L2CAP, SO_L2CAP_LM, 0);
mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
cv_init(&sc->sc_cv, device_xname(self));
/*
* extract config from proplist
*/
obj = prop_dictionary_get(dict, BTDEVladdr);
bdaddr_copy(&sc->sc_laddr, prop_data_data_nocopy(obj));
obj = prop_dictionary_get(dict, BTDEVraddr);
bdaddr_copy(&sc->sc_raddr, prop_data_data_nocopy(obj));
obj = prop_dictionary_get(dict, BTDEVvendor);
vendor = (int)prop_number_integer_value(obj);
obj = prop_dictionary_get(dict, BTDEVproduct);
product = (int)prop_number_integer_value(obj);
obj = prop_dictionary_get(dict, BTDEVmode);
if (prop_object_type(obj) == PROP_TYPE_STRING) {
if (prop_string_equals_cstring(obj, BTDEVauth))
sockopt_setint(&sc->sc_mode, L2CAP_LM_AUTH);
else if (prop_string_equals_cstring(obj, BTDEVencrypt))
sockopt_setint(&sc->sc_mode, L2CAP_LM_ENCRYPT);
else if (prop_string_equals_cstring(obj, BTDEVsecure))
sockopt_setint(&sc->sc_mode, L2CAP_LM_SECURE);
else {
aprint_error(" unknown %s\n", BTDEVmode);
return;
}
aprint_verbose(" %s %s", BTDEVmode,
prop_string_cstring_nocopy(obj));
} else
sockopt_setint(&sc->sc_mode, 0);
obj = prop_dictionary_get(dict, BTHIDEVcontrolpsm);
if (prop_object_type(obj) == PROP_TYPE_NUMBER) {
sc->sc_ctlpsm = prop_number_integer_value(obj);
if (L2CAP_PSM_INVALID(sc->sc_ctlpsm)) {
aprint_error(" invalid %s\n", BTHIDEVcontrolpsm);
return;
}
}
obj = prop_dictionary_get(dict, BTHIDEVinterruptpsm);
if (prop_object_type(obj) == PROP_TYPE_NUMBER) {
sc->sc_intpsm = prop_number_integer_value(obj);
if (L2CAP_PSM_INVALID(sc->sc_intpsm)) {
aprint_error(" invalid %s\n", BTHIDEVinterruptpsm);
return;
}
}
obj = prop_dictionary_get(dict, BTHIDEVdescriptor);
if (prop_object_type(obj) == PROP_TYPE_DATA) {
dlen = prop_data_size(obj);
desc = prop_data_data_nocopy(obj);
} else {
aprint_error(" no %s\n", BTHIDEVdescriptor);
return;
}
obj = prop_dictionary_get(dict, BTHIDEVreconnect);
if (prop_object_type(obj) == PROP_TYPE_BOOL
&& !prop_bool_true(obj))
sc->sc_flags |= BTHID_RECONNECT;
/*
* Parse the descriptor and attach child devices, one per report.
*/
maxid = -1;
h.report_ID = 0;
d = hid_start_parse(desc, dlen, hid_none);
while (hid_get_item(d, &h)) {
if (h.report_ID > maxid)
maxid = h.report_ID;
}
hid_end_parse(d);
if (maxid < 0) {
aprint_error(" no reports found\n");
return;
}
aprint_normal("\n");
if (kthread_create(PRI_NONE, KTHREAD_MUSTJOIN, NULL, bthidev_process,
sc, &sc->sc_lwp, "%s", device_xname(self)) != 0) {
aprint_error_dev(self, "failed to create input thread\n");
return;
}
for (rep = 0 ; rep <= maxid ; rep++) {
if (hid_report_size(desc, dlen, hid_feature, rep) == 0
&& hid_report_size(desc, dlen, hid_input, rep) == 0
&& hid_report_size(desc, dlen, hid_output, rep) == 0)
continue;
bha.ba_vendor = vendor;
bha.ba_product = product;
bha.ba_desc = desc;
bha.ba_dlen = dlen;
bha.ba_input = bthidev_null;
bha.ba_feature = bthidev_null;
bha.ba_output = bthidev_output;
bha.ba_id = rep;
locs[BTHIDBUSCF_REPORTID] = rep;
dev = config_found_sm_loc(self, "bthidbus",
locs, &bha, bthidev_print, config_stdsubmatch);
if (dev != NULL) {
hidev = device_private(dev);
hidev->sc_dev = dev;
hidev->sc_parent = self;
hidev->sc_id = rep;
hidev->sc_input = bha.ba_input;
hidev->sc_feature = bha.ba_feature;
LIST_INSERT_HEAD(&sc->sc_list, hidev, sc_next);
}
}
pmf_device_register(self, NULL, NULL);
/*
* start bluetooth connections
*/
mutex_enter(bt_lock);
if ((sc->sc_flags & BTHID_RECONNECT) == 0
&& (err = bthidev_listen(sc)) != 0)
aprint_error_dev(self, "failed to listen (%d)\n", err);
if (sc->sc_flags & BTHID_CONNECTING)
bthidev_connect(sc);
mutex_exit(bt_lock);
}
static int
bthidev_detach(device_t self, int flags)
{
struct bthidev_softc *sc = device_private(self);
struct bthidev *hidev;
mutex_enter(bt_lock);
sc->sc_flags = 0; /* disable reconnecting */
/* release interrupt listen */
if (sc->sc_int_l != NULL) {
l2cap_detach_pcb(&sc->sc_int_l);
sc->sc_int_l = NULL;
}
/* release control listen */
if (sc->sc_ctl_l != NULL) {
l2cap_detach_pcb(&sc->sc_ctl_l);
sc->sc_ctl_l = NULL;
}
/* close interrupt channel */
if (sc->sc_int != NULL) {
l2cap_disconnect_pcb(sc->sc_int, 0);
l2cap_detach_pcb(&sc->sc_int);
sc->sc_int = NULL;
}
/* close control channel */
if (sc->sc_ctl != NULL) {
l2cap_disconnect_pcb(sc->sc_ctl, 0);
l2cap_detach_pcb(&sc->sc_ctl);
sc->sc_ctl = NULL;
}
callout_halt(&sc->sc_reconnect, bt_lock);
callout_destroy(&sc->sc_reconnect);
mutex_exit(bt_lock);
pmf_device_deregister(self);
/* kill off the input processor */
if (sc->sc_lwp != NULL) {
mutex_enter(&sc->sc_lock);
sc->sc_detach = 1;
cv_signal(&sc->sc_cv);
mutex_exit(&sc->sc_lock);
kthread_join(sc->sc_lwp);
sc->sc_lwp = NULL;
}
/* detach children */
while ((hidev = LIST_FIRST(&sc->sc_list)) != NULL) {
LIST_REMOVE(hidev, sc_next);
config_detach(hidev->sc_dev, flags);
}
MBUFQ_DRAIN(&sc->sc_inq);
cv_destroy(&sc->sc_cv);
mutex_destroy(&sc->sc_lock);
sockopt_destroy(&sc->sc_mode);
return 0;
}
/*
* bthidev config print
*/
static int
bthidev_print(void *aux, const char *pnp)
{
struct bthidev_attach_args *ba = aux;
if (pnp != NULL)
aprint_normal("%s:", pnp);
if (ba->ba_id > 0)
aprint_normal(" reportid %d", ba->ba_id);
return UNCONF;
}
/*****************************************************************************
*
* bluetooth(4) HID attach/detach routines
*/
/*
* callouts are scheduled after connections have been lost, in order
* to clean up and reconnect.
*/
static void
bthidev_timeout(void *arg)
{
struct bthidev_softc *sc = arg;
mutex_enter(bt_lock);
callout_ack(&sc->sc_reconnect);
switch (sc->sc_state) {
case BTHID_CLOSED:
if (sc->sc_int != NULL) {
l2cap_disconnect_pcb(sc->sc_int, 0);
break;
}
if (sc->sc_ctl != NULL) {
l2cap_disconnect_pcb(sc->sc_ctl, 0);
break;
}
if (sc->sc_flags & BTHID_RECONNECT) {
sc->sc_flags |= BTHID_CONNECTING;
bthidev_connect(sc);
break;
}
break;
case BTHID_WAIT_CTL:
break;
case BTHID_WAIT_INT:
break;
case BTHID_OPEN:
break;
default:
break;
}
mutex_exit(bt_lock);
}
/*
* listen for our device
*/
static int
bthidev_listen(struct bthidev_softc *sc)
{
struct sockaddr_bt sa;
int err;
memset(&sa, 0, sizeof(sa));
sa.bt_len = sizeof(sa);
sa.bt_family = AF_BLUETOOTH;
bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr);
/*
* Listen on control PSM
*/
err = l2cap_attach_pcb(&sc->sc_ctl_l, &bthidev_ctl_proto, sc);
if (err)
return err;
err = l2cap_setopt(sc->sc_ctl_l, &sc->sc_mode);
if (err)
return err;
sa.bt_psm = sc->sc_ctlpsm;
err = l2cap_bind_pcb(sc->sc_ctl_l, &sa);
if (err)
return err;
err = l2cap_listen_pcb(sc->sc_ctl_l);
if (err)
return err;
/*
* Listen on interrupt PSM
*/
err = l2cap_attach_pcb(&sc->sc_int_l, &bthidev_int_proto, sc);
if (err)
return err;
err = l2cap_setopt(sc->sc_int_l, &sc->sc_mode);
if (err)
return err;
sa.bt_psm = sc->sc_intpsm;
err = l2cap_bind_pcb(sc->sc_int_l, &sa);
if (err)
return err;
err = l2cap_listen_pcb(sc->sc_int_l);
if (err)
return err;
sc->sc_state = BTHID_WAIT_CTL;
return 0;
}
/*
* start connecting to our device
*/
static int
bthidev_connect(struct bthidev_softc *sc)
{
struct sockaddr_bt sa;
int err;
if (sc->sc_attempts++ > 0)
aprint_verbose_dev(sc->sc_dev, "connect (#%d)\n", sc->sc_attempts);
memset(&sa, 0, sizeof(sa));
sa.bt_len = sizeof(sa);
sa.bt_family = AF_BLUETOOTH;
err = l2cap_attach_pcb(&sc->sc_ctl, &bthidev_ctl_proto, sc);
if (err) {
aprint_error_dev(sc->sc_dev, "l2cap_attach failed (%d)\n", err);
return err;
}
err = l2cap_setopt(sc->sc_ctl, &sc->sc_mode);
if (err) {
aprint_error_dev(sc->sc_dev, "l2cap_setopt failed (%d)\n", err);
return err;
}
bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr);
err = l2cap_bind_pcb(sc->sc_ctl, &sa);
if (err) {
aprint_error_dev(sc->sc_dev, "l2cap_bind_pcb failed (%d)\n", err);
return err;
}
sa.bt_psm = sc->sc_ctlpsm;
bdaddr_copy(&sa.bt_bdaddr, &sc->sc_raddr);
err = l2cap_connect_pcb(sc->sc_ctl, &sa);
if (err) {
aprint_error_dev(sc->sc_dev, "l2cap_connect_pcb failed (%d)\n", err);
return err;
}
sc->sc_state = BTHID_WAIT_CTL;
return 0;
}
/*
* The LWP which processes input reports, forwarding to child devices.
* We are always either processing input reports, holding the lock, or
* waiting for a signal on condvar.
*/
static void
bthidev_process(void *arg)
{
struct bthidev_softc *sc = arg;
struct mbuf *m;
mutex_enter(&sc->sc_lock);
while (sc->sc_detach == 0) {
MBUFQ_DEQUEUE(&sc->sc_inq, m);
if (m == NULL) {
cv_wait(&sc->sc_cv, &sc->sc_lock);
continue;
}
mutex_exit(&sc->sc_lock);
bthidev_process_one(sc, m);
m_freem(m);
mutex_enter(&sc->sc_lock);
}
mutex_exit(&sc->sc_lock);
kthread_exit(0);
}
static void
bthidev_process_one(struct bthidev_softc *sc, struct mbuf *m)
{
struct bthidev *hidev;
uint8_t *data;
int len;
if (sc->sc_state != BTHID_OPEN)
return;
if (m->m_pkthdr.len > m->m_len)
aprint_error_dev(sc->sc_dev, "truncating HID report\n");
len = m->m_len;
data = mtod(m, uint8_t *);
switch (BTHID_TYPE(data[0])) {
case BTHID_DATA:
/*
* data[0] == type / parameter
* data[1] == id
* data[2..len] == report
*/
if (len < 3)
break;
LIST_FOREACH(hidev, &sc->sc_list, sc_next)
if (data[1] == hidev->sc_id)
break;
if (hidev == NULL) {
aprint_error_dev(sc->sc_dev,
"report id %d, len = %d ignored\n", data[1], len - 2);
break;
}
switch (BTHID_DATA_PARAM(data[0])) {
case BTHID_DATA_INPUT:
(*hidev->sc_input)(hidev, data + 2, len - 2);
break;
case BTHID_DATA_FEATURE:
(*hidev->sc_feature)(hidev, data + 2, len - 2);
break;
default:
break;
}
break;
case BTHID_CONTROL:
if (len < 1)
break;
switch (BTHID_DATA_PARAM(data[0])) {
case BTHID_CONTROL_UNPLUG:
aprint_normal_dev(sc->sc_dev, "unplugged\n");
mutex_enter(bt_lock);
/* close interrupt channel */
if (sc->sc_int != NULL) {
l2cap_disconnect_pcb(sc->sc_int, 0);
l2cap_detach_pcb(&sc->sc_int);
sc->sc_int = NULL;
}
/* close control channel */
if (sc->sc_ctl != NULL) {
l2cap_disconnect_pcb(sc->sc_ctl, 0);
l2cap_detach_pcb(&sc->sc_ctl);
sc->sc_ctl = NULL;
}
mutex_exit(bt_lock);
break;
default:
break;
}
break;
default:
break;
}
}
/*****************************************************************************
*
* bluetooth(9) callback methods for L2CAP
*
* All these are called from Bluetooth Protocol code, in a soft
* interrupt context at IPL_SOFTNET.
*/
static void
bthidev_connecting(void *arg)
{
/* dont care */
}
static void
bthidev_ctl_connected(void *arg)
{
struct sockaddr_bt sa;
struct bthidev_softc *sc = arg;
int err;
if (sc->sc_state != BTHID_WAIT_CTL)
return;
KASSERT(sc->sc_ctl != NULL);
KASSERT(sc->sc_int == NULL);
if (sc->sc_flags & BTHID_CONNECTING) {
/* initiate connect on interrupt PSM */
err = l2cap_attach_pcb(&sc->sc_int, &bthidev_int_proto, sc);
if (err)
goto fail;
err = l2cap_setopt(sc->sc_int, &sc->sc_mode);
if (err)
goto fail;
memset(&sa, 0, sizeof(sa));
sa.bt_len = sizeof(sa);
sa.bt_family = AF_BLUETOOTH;
bdaddr_copy(&sa.bt_bdaddr, &sc->sc_laddr);
err = l2cap_bind_pcb(sc->sc_int, &sa);
if (err)
goto fail;
sa.bt_psm = sc->sc_intpsm;
bdaddr_copy(&sa.bt_bdaddr, &sc->sc_raddr);
err = l2cap_connect_pcb(sc->sc_int, &sa);
if (err)
goto fail;
}
sc->sc_state = BTHID_WAIT_INT;
return;
fail:
l2cap_detach_pcb(&sc->sc_ctl);
sc->sc_ctl = NULL;
aprint_error_dev(sc->sc_dev, "connect failed (%d)\n", err);
}
static void
bthidev_int_connected(void *arg)
{
struct bthidev_softc *sc = arg;
if (sc->sc_state != BTHID_WAIT_INT)
return;
KASSERT(sc->sc_ctl != NULL);
KASSERT(sc->sc_int != NULL);
sc->sc_attempts = 0;
sc->sc_flags &= ~BTHID_CONNECTING;
sc->sc_state = BTHID_OPEN;
aprint_normal_dev(sc->sc_dev, "connected\n");
}
/*
* Disconnected
*
* Depending on our state, this could mean several things, but essentially
* we are lost. If both channels are closed, and we are marked to reconnect,
* schedule another try otherwise just give up. They will contact us.
*/
static void
bthidev_ctl_disconnected(void *arg, int err)
{
struct bthidev_softc *sc = arg;
if (sc->sc_ctl != NULL) {
l2cap_detach_pcb(&sc->sc_ctl);
sc->sc_ctl = NULL;
}
sc->sc_state = BTHID_CLOSED;
if (sc->sc_int == NULL) {
aprint_normal_dev(sc->sc_dev, "disconnected (%d)\n", err);
sc->sc_flags &= ~BTHID_CONNECTING;
if (sc->sc_flags & BTHID_RECONNECT)
callout_schedule(&sc->sc_reconnect,
BTHID_RETRY_INTERVAL * hz);
else
sc->sc_state = BTHID_WAIT_CTL;
} else {
/*
* The interrupt channel should have been closed first,
* but its potentially unsafe to detach that from here.
* Give them a second to do the right thing or let the
* callout handle it.
*/
callout_schedule(&sc->sc_reconnect, hz);
}
}
static void
bthidev_int_disconnected(void *arg, int err)
{
struct bthidev_softc *sc = arg;
if (sc->sc_int != NULL) {
l2cap_detach_pcb(&sc->sc_int);
sc->sc_int = NULL;
}
sc->sc_state = BTHID_CLOSED;
if (sc->sc_ctl == NULL) {
aprint_normal_dev(sc->sc_dev, "disconnected (%d)\n", err);
sc->sc_flags &= ~BTHID_CONNECTING;
if (sc->sc_flags & BTHID_RECONNECT)
callout_schedule(&sc->sc_reconnect,
BTHID_RETRY_INTERVAL * hz);
else
sc->sc_state = BTHID_WAIT_CTL;
} else {
/*
* The control channel should be closing also, allow
* them a chance to do that before we force it.
*/
callout_schedule(&sc->sc_reconnect, hz);
}
}
/*
* New Connections
*
* We give a new L2CAP handle back if this matches the BDADDR we are
* listening for and we are in the right state. bthidev_connected will
* be called when the connection is open, so nothing else to do here
*/
static void *
bthidev_ctl_newconn(void *arg, struct sockaddr_bt *laddr,
struct sockaddr_bt *raddr)
{
struct bthidev_softc *sc = arg;
if (bdaddr_same(&raddr->bt_bdaddr, &sc->sc_raddr) == 0)
return NULL;
if ((sc->sc_flags & BTHID_CONNECTING)
|| sc->sc_state != BTHID_WAIT_CTL
|| sc->sc_ctl != NULL
|| sc->sc_int != NULL) {
aprint_verbose_dev(sc->sc_dev, "reject ctl newconn %s%s%s%s\n",
(sc->sc_flags & BTHID_CONNECTING) ? " (CONNECTING)" : "",
(sc->sc_state == BTHID_WAIT_CTL) ? " (WAITING)": "",
(sc->sc_ctl != NULL) ? " (GOT CONTROL)" : "",
(sc->sc_int != NULL) ? " (GOT INTERRUPT)" : "");
return NULL;
}
l2cap_attach_pcb(&sc->sc_ctl, &bthidev_ctl_proto, sc);
return sc->sc_ctl;
}
static void *
bthidev_int_newconn(void *arg, struct sockaddr_bt *laddr,
struct sockaddr_bt *raddr)
{
struct bthidev_softc *sc = arg;
if (bdaddr_same(&raddr->bt_bdaddr, &sc->sc_raddr) == 0)
return NULL;
if ((sc->sc_flags & BTHID_CONNECTING)
|| sc->sc_state != BTHID_WAIT_INT
|| sc->sc_ctl == NULL
|| sc->sc_int != NULL) {
aprint_verbose_dev(sc->sc_dev, "reject int newconn %s%s%s%s\n",
(sc->sc_flags & BTHID_CONNECTING) ? " (CONNECTING)" : "",
(sc->sc_state == BTHID_WAIT_INT) ? " (WAITING)": "",
(sc->sc_ctl == NULL) ? " (NO CONTROL)" : "",
(sc->sc_int != NULL) ? " (GOT INTERRUPT)" : "");
return NULL;
}
l2cap_attach_pcb(&sc->sc_int, &bthidev_int_proto, sc);
return sc->sc_int;
}
static void
bthidev_complete(void *arg, int count)
{
/* dont care */
}
static void
bthidev_linkmode(void *arg, int new)
{
struct bthidev_softc *sc = arg;
int mode;
(void)sockopt_getint(&sc->sc_mode, &mode);
if ((mode & L2CAP_LM_AUTH) && !(new & L2CAP_LM_AUTH))
aprint_error_dev(sc->sc_dev, "auth failed\n");
else if ((mode & L2CAP_LM_ENCRYPT) && !(new & L2CAP_LM_ENCRYPT))
aprint_error_dev(sc->sc_dev, "encrypt off\n");
else if ((mode & L2CAP_LM_SECURE) && !(new & L2CAP_LM_SECURE))
aprint_error_dev(sc->sc_dev, "insecure\n");
else
return;
if (sc->sc_int != NULL)
l2cap_disconnect_pcb(sc->sc_int, 0);
if (sc->sc_ctl != NULL)
l2cap_disconnect_pcb(sc->sc_ctl, 0);
}
/*
* Receive reports from the protocol stack. Because this will be called
* with bt_lock held, we queue the mbuf and process it with a kernel thread
*/
static void
bthidev_input(void *arg, struct mbuf *m)
{
struct bthidev_softc *sc = arg;
if (sc->sc_state != BTHID_OPEN) {
m_freem(m);
return;
}
mutex_enter(&sc->sc_lock);
MBUFQ_ENQUEUE(&sc->sc_inq, m);
cv_signal(&sc->sc_cv);
mutex_exit(&sc->sc_lock);
}
/*****************************************************************************
*
* IO routines
*/
static void
bthidev_null(struct bthidev *hidev, uint8_t *report, int len)
{
/*
* empty routine just in case the device
* provided no method to handle this report
*/
}
static int
bthidev_output(struct bthidev *hidev, uint8_t *report, int rlen)
{
struct bthidev_softc *sc = device_private(hidev->sc_parent);
struct mbuf *m;
int err;
if (sc == NULL || sc->sc_state != BTHID_OPEN)
return ENOTCONN;
KASSERT(sc->sc_ctl != NULL);
KASSERT(sc->sc_int != NULL);
if (rlen == 0 || report == NULL)
return 0;
if (rlen > MHLEN - 2) {
aprint_error_dev(sc->sc_dev,
"output report too long (%d)!\n", rlen);
return EMSGSIZE;
}
m = m_gethdr(M_DONTWAIT, MT_DATA);
if (m == NULL)
return ENOMEM;
/*
* data[0] = type / parameter
* data[1] = id
* data[2..N] = report
*/
mtod(m, uint8_t *)[0] = (uint8_t)((BTHID_DATA << 4) | BTHID_DATA_OUTPUT);
mtod(m, uint8_t *)[1] = hidev->sc_id;
memcpy(mtod(m, uint8_t *) + 2, report, rlen);
m->m_pkthdr.len = m->m_len = rlen + 2;
mutex_enter(bt_lock);
err = l2cap_send_pcb(sc->sc_int, m);
mutex_exit(bt_lock);
return err;
}
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