--- /dev/null
+/*
+ * $Id$
+ *
+ * Copyright (C) 2005 Mike Isely <isely@pobox.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include "pvrusb2-context.h"
+#include "pvrusb2-io.h"
+#include "pvrusb2-ioread.h"
+#include "pvrusb2-hdw.h"
+#include "pvrusb2-debug.h"
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <asm/semaphore.h>
+
+
+static void pvr2_context_destroy(struct pvr2_context *mp)
+{
+ if (mp->hdw) pvr2_hdw_destroy(mp->hdw);
+ pvr2_trace(PVR2_TRACE_STRUCT,"Destroying pvr_main id=%p",mp);
+ flush_workqueue(mp->workqueue);
+ destroy_workqueue(mp->workqueue);
+ kfree(mp);
+}
+
+
+static void pvr2_context_trigger_poll(struct pvr2_context *mp)
+{
+ queue_work(mp->workqueue,&mp->workpoll);
+}
+
+
+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);
+}
+
+
+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);
+}
+
+
+struct pvr2_context *pvr2_context_create(
+ struct usb_interface *intf,
+ const struct usb_device_id *devid,
+ void (*setup_func)(struct pvr2_context *))
+{
+ struct pvr2_context *mp = NULL;
+ mp = kmalloc(sizeof(*mp),GFP_KERNEL);
+ if (!mp) goto done;
+ memset(mp,0,sizeof(*mp));
+ pvr2_trace(PVR2_TRACE_STRUCT,"Creating pvr_main id=%p",mp);
+ mp->setup_func = setup_func;
+ mutex_init(&mp->mutex);
+ mp->hdw = pvr2_hdw_create(intf,devid);
+ if (!mp->hdw) {
+ pvr2_context_destroy(mp);
+ mp = NULL;
+ goto done;
+ }
+
+ mp->workqueue = create_singlethread_workqueue("pvrusb2");
+ INIT_WORK(&mp->workinit,(void (*)(void*))pvr2_context_setup,mp);
+ INIT_WORK(&mp->workpoll,(void (*)(void*))pvr2_context_poll,mp);
+ queue_work(mp->workqueue,&mp->workinit);
+ done:
+ return mp;
+}
+
+
+void pvr2_context_enter(struct pvr2_context *mp)
+{
+ mutex_lock(&mp->mutex);
+ pvr2_trace(PVR2_TRACE_CREG,"pvr2_context_enter(id=%p)",mp);
+}
+
+
+void pvr2_context_exit(struct pvr2_context *mp)
+{
+ int destroy_flag = 0;
+ if (!(mp->mc_first || !mp->disconnect_flag)) {
+ destroy_flag = !0;
+ }
+ pvr2_trace(PVR2_TRACE_CREG,"pvr2_context_exit(id=%p) outside",mp);
+ mutex_unlock(&mp->mutex);
+ if (destroy_flag) pvr2_context_destroy(mp);
+}
+
+
+static void pvr2_context_run_checks(struct pvr2_context *mp)
+{
+ struct pvr2_channel *ch1,*ch2;
+ for (ch1 = mp->mc_first; ch1; ch1 = ch2) {
+ ch2 = ch1->mc_next;
+ if (ch1->check_func) {
+ ch1->check_func(ch1);
+ }
+ }
+}
+
+
+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)
+{
+ 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;
+}
+
+
+static void pvr2_channel_disclaim_stream(struct pvr2_channel *cp)
+{
+ if (!cp->stream) return;
+ pvr2_stream_kill(cp->stream->stream);
+ cp->stream->user = NULL;
+ cp->stream = NULL;
+}
+
+
+void pvr2_channel_done(struct pvr2_channel *cp)
+{
+ struct pvr2_context *mp = cp->mc_head;
+ pvr2_channel_disclaim_stream(cp);
+ 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;
+}
+
+
+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;
+}
+
+
+// This is the marker for the real beginning of a legitimate mpeg2 stream.
+static char stream_sync_key[] = {
+ 0x00, 0x00, 0x01, 0xba,
+};
+
+struct pvr2_ioread *pvr2_channel_create_mpeg_stream(
+ struct pvr2_context_stream *sp)
+{
+ struct pvr2_ioread *cp;
+ cp = pvr2_ioread_create();
+ if (!cp) return NULL;
+ pvr2_ioread_setup(cp,sp->stream);
+ pvr2_ioread_set_sync_key(cp,stream_sync_key,sizeof(stream_sync_key));
+ return cp;
+}
+
+
+/*
+ Stuff for Emacs to see, in order to encourage consistent editing style:
+ *** Local Variables: ***
+ *** mode: c ***
+ *** fill-column: 75 ***
+ *** tab-width: 8 ***
+ *** c-basic-offset: 8 ***
+ *** End: ***
+ */
git://git.onelab.eu / linux-2.6.git / blobdiff