static void pvr2_context_poll(struct work_struct *work)
{
struct pvr2_context *mp =
container_of(work, struct pvr2_context, workpoll);
pvr2_context_enter(mp); do {
pvr2_hdw_poll(mp->hdw);
} while (0); pvr2_context_exit(mp);
}
void pvr2_context_disconnect(struct pvr2_context *mp)
{
pvr2_context_enter(mp); do {
pvr2_hdw_disconnect(mp->hdw);
mp->disconnect_flag = !0;
pvr2_context_run_checks(mp);
} while (0); pvr2_context_exit(mp);
}
void pvr2_channel_init(struct pvr2_channel *cp,struct pvr2_context *mp)
{
pvr2_context_enter(mp);
cp->hdw = mp->hdw;
cp->mc_head = mp;
cp->mc_next = NULL;
cp->mc_prev = mp->mc_last;
if (mp->mc_last) {
mp->mc_last->mc_next = cp;
} else {
mp->mc_first = cp;
}
mp->mc_last = cp;
pvr2_context_exit(mp);
}
int pvr2_channel_claim_stream(struct pvr2_channel *cp,
struct pvr2_context_stream *sp)
{
int code = 0;
pvr2_context_enter(cp->mc_head); do {
if (sp == cp->stream) break;
if (sp->user) {
code = -EBUSY;
break;
}
pvr2_channel_disclaim_stream(cp);
if (!sp) break;
sp->user = cp;
cp->stream = sp;
} while (0); pvr2_context_exit(cp->mc_head);
return code;
}
static void pvr2_context_setup(struct pvr2_context *mp)
{
pvr2_context_enter(mp); do {
if (!pvr2_hdw_dev_ok(mp->hdw)) break;
pvr2_hdw_setup(mp->hdw);
pvr2_hdw_setup_poll_trigger(
mp->hdw,
(void (*)(void *))pvr2_context_trigger_poll,
mp);
if (!pvr2_hdw_dev_ok(mp->hdw)) break;
if (!pvr2_hdw_init_ok(mp->hdw)) break;
mp->video_stream.stream = pvr2_hdw_get_video_stream(mp->hdw);
if (mp->setup_func) {
mp->setup_func(mp);
}
} while (0); pvr2_context_exit(mp);
}
int pvr2_channel_limit_inputs(struct pvr2_channel *cp,unsigned int cmsk)
{
unsigned int tmsk,mmsk;
int ret = 0;
struct pvr2_channel *p2;
struct pvr2_hdw *hdw = cp->hdw;
mmsk = pvr2_hdw_get_input_available(hdw);
cmsk &= mmsk;
if (cmsk == cp->input_mask) {
/* No change; nothing to do */
return 0;
}
pvr2_context_enter(cp->mc_head);
do {
if (!cmsk) {
cp->input_mask = 0;
pvr2_context_reset_input_limits(cp->mc_head);
break;
}
tmsk = mmsk;
for (p2 = cp->mc_head->mc_first; p2; p2 = p2->mc_next) {
if (p2 == cp) continue;
if (!p2->input_mask) continue;
tmsk &= p2->input_mask;
}
if (!(tmsk & cmsk)) {
ret = -EPERM;
break;
}
tmsk &= cmsk;
if ((ret = pvr2_hdw_set_input_allowed(hdw,mmsk,tmsk)) != 0) {
/* Internal failure changing allowed list; probably
should not happen, but react if it does. */
break;
}
cp->input_mask = cmsk;
pvr2_hdw_commit_ctl(hdw);
} while (0);
pvr2_context_exit(cp->mc_head);
return ret;
}
void pvr2_channel_done(struct pvr2_channel *cp)
{
struct pvr2_context *mp = cp->mc_head;
pvr2_context_enter(mp);
cp->input_mask = 0;
pvr2_channel_disclaim_stream(cp);
pvr2_context_reset_input_limits(mp);
if (cp->mc_next) {
cp->mc_next->mc_prev = cp->mc_prev;
} else {
mp->mc_last = cp->mc_prev;
}
if (cp->mc_prev) {
cp->mc_prev->mc_next = cp->mc_next;
} else {
mp->mc_first = cp->mc_next;
}
cp->hdw = NULL;
pvr2_context_exit(mp);
}
static void pvr2_context_poll(struct pvr2_context *mp)
{
pvr2_context_enter(mp); do {
pvr2_hdw_poll(mp->hdw);
} while (0); pvr2_context_exit(mp);
}