static int
vaudio_thread (void* data)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
daemonize();
#else
daemonize("vaudio-fe");
#endif
data = (void*) vaudio;
while (!vaudio_thread_aborted) {
down (&vaudio_thread_sem);
if ( (vaudio_thread_init_now & 2) ) {
vaudio_thread_init_now &= ~2;
snd_card_free(vaudio_card);
if (vaudio_snd_probe() < 0) {
ETRACE ("virtual audio ALSA card initialization failed\n");
}
}
if ( (vaudio_thread_init_now & 1) ) {
vaudio_thread_init_now &= ~1;
vaudio_snd_init_card(data);
}
}
complete_and_exit(&vaudio_thread_completion, 0);
/*NOTREACHED*/
return 0;
}
static int __init
vaudio_init (void)
{
ADEBUG();
sema_init(&vaudio_thread_sem, 0);
if (vaudio_snd_probe() < 0) {
ETRACE ("virtual audio ALSA card initialization failed\n");
return -ENODEV;
}
vaudio_thread_id = kernel_thread(vaudio_thread, 0, 0);
if (vaudio_thread_id < 0) {
ETRACE ("virtual audio kernel thread creation failure \n");
return vaudio_thread_id;
}
#if VAUDIO_PROC_SYNC
vaudio_proc_create("close");
#endif
return 0;
}
static int
vaudio_thread (void* data)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
daemonize();
#else
daemonize("vaudio-fe");
#endif
data = (void*) vaudio;
while (!vaudio_thread_aborted) {
down (&vaudio_thread_sem);
#if 0
if ( (vaudio_thread_init_now & 2) ) {
vaudio_thread_init_now &= ~2;
#else
if ( test_and_clear_bit(1, &vaudio_thread_init_now) ) {
#endif
snd_card_free(vaudio_card);
if (vaudio_snd_probe() < 0) {
ETRACE ("virtual audio ALSA card initialization failed\n");
}
}
#if 0
if ( (vaudio_thread_init_now & 1) ) {
vaudio_thread_init_now &= ~1;
#else
if ( test_and_clear_bit(0, &vaudio_thread_init_now) ) {
#endif
data= vaudio_card->private_data;
vaudio_snd_init_card(data);
}
}
complete_and_exit(&vaudio_thread_completion, 0);
/*NOTREACHED*/
return 0;
}
static void
vaudio_sysconf_trigger (NkVaudio dev)
{
DTRACE ("Sending sysconf OS#%d(%d)->OS#%d(%d)\n",
dev->vlink->c_id, dev->vlink->c_state,
dev->vlink->s_id, dev->vlink->s_state);
nkops.nk_xirq_trigger(NK_XIRQ_SYSCONF, dev->vlink->s_id);
}
static int
vaudio_handshake (NkVaudio dev)
{
volatile int* my_state = &dev->vlink->c_state;
const int peer_state = dev->vlink->s_state;
DTRACE ("handshake OS#%d(%d)->OS#%d(%d)\n",
dev->vlink->s_id, peer_state,
dev->vlink->c_id, *my_state);
switch (*my_state) {
case NK_DEV_VLINK_OFF:
if (peer_state != NK_DEV_VLINK_ON) {
*my_state = NK_DEV_VLINK_RESET;
vaudio_sysconf_trigger(dev);
}
break;
case NK_DEV_VLINK_RESET:
if (peer_state != NK_DEV_VLINK_OFF) {
*my_state = NK_DEV_VLINK_ON;
#if 0
vaudio_thread_init_now |= 1;
#else
set_bit(0, &vaudio_thread_init_now);
#endif
up(&vaudio_thread_sem);
vaudio_sysconf_trigger(dev);
}
break;
case NK_DEV_VLINK_ON:
if (peer_state == NK_DEV_VLINK_OFF) {
*my_state = NK_DEV_VLINK_OFF;
#if 0
vaudio_thread_init_now |= 2;
#else
set_bit(1, &vaudio_thread_init_now);
#endif
up(&vaudio_thread_sem);
vaudio_sysconf_trigger(dev);
}
break;
}
return (*my_state == NK_DEV_VLINK_ON) &&
(peer_state == NK_DEV_VLINK_ON);
}
static void
vaudio_sysconf_intr (void* cookie, NkXIrq xirq)
{
(void) xirq;
vaudio_handshake ((NkVaudio) cookie);
}
