+++ /dev/null
-/*
- *
- * some helper function for simple DVB cards which simply DMA the
- * complete transport stream and let the computer sort everything else
- * (i.e. we are using the software demux, ...). Also uses the
- * video-buf to manage DMA buffers.
- *
- * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SUSE Labs]
- *
- * 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, or
- * (at your option) any later version.
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/fs.h>
-#include <linux/kthread.h>
-#include <linux/file.h>
-#include <linux/slab.h>
-
-#include <linux/freezer.h>
-
-#include <media/videobuf-core.h>
-#include <media/videobuf-dvb.h>
-
-/* ------------------------------------------------------------------ */
-
-MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
-MODULE_LICENSE("GPL");
-
-static unsigned int debug;
-module_param(debug, int, 0644);
-MODULE_PARM_DESC(debug,"enable debug messages");
-
-#define dprintk(fmt, arg...) if (debug) \
- printk(KERN_DEBUG "%s/dvb: " fmt, dvb->name , ## arg)
-
-/* ------------------------------------------------------------------ */
-
-static int videobuf_dvb_thread(void *data)
-{
- struct videobuf_dvb *dvb = data;
- struct videobuf_buffer *buf;
- unsigned long flags;
- void *outp;
-
- dprintk("dvb thread started\n");
- set_freezable();
- videobuf_read_start(&dvb->dvbq);
-
- for (;;) {
- /* fetch next buffer */
- buf = list_entry(dvb->dvbq.stream.next,
- struct videobuf_buffer, stream);
- list_del(&buf->stream);
- videobuf_waiton(&dvb->dvbq, buf, 0, 1);
-
- /* no more feeds left or stop_feed() asked us to quit */
- if (0 == dvb->nfeeds)
- break;
- if (kthread_should_stop())
- break;
- try_to_freeze();
-
- /* feed buffer data to demux */
- outp = videobuf_queue_to_vaddr(&dvb->dvbq, buf);
-
- if (buf->state == VIDEOBUF_DONE)
- dvb_dmx_swfilter(&dvb->demux, outp,
- buf->size);
-
- /* requeue buffer */
- list_add_tail(&buf->stream,&dvb->dvbq.stream);
- spin_lock_irqsave(dvb->dvbq.irqlock,flags);
- dvb->dvbq.ops->buf_queue(&dvb->dvbq,buf);
- spin_unlock_irqrestore(dvb->dvbq.irqlock,flags);
- }
-
- videobuf_read_stop(&dvb->dvbq);
- dprintk("dvb thread stopped\n");
-
- /* Hmm, linux becomes *very* unhappy without this ... */
- while (!kthread_should_stop()) {
- set_current_state(TASK_INTERRUPTIBLE);
- schedule();
- }
- return 0;
-}
-
-static int videobuf_dvb_start_feed(struct dvb_demux_feed *feed)
-{
- struct dvb_demux *demux = feed->demux;
- struct videobuf_dvb *dvb = demux->priv;
- int rc;
-
- if (!demux->dmx.frontend)
- return -EINVAL;
-
- mutex_lock(&dvb->lock);
- dvb->nfeeds++;
- rc = dvb->nfeeds;
-
- if (NULL != dvb->thread)
- goto out;
- dvb->thread = kthread_run(videobuf_dvb_thread,
- dvb, "%s dvb", dvb->name);
- if (IS_ERR(dvb->thread)) {
- rc = PTR_ERR(dvb->thread);
- dvb->thread = NULL;
- }
-
-out:
- mutex_unlock(&dvb->lock);
- return rc;
-}
-
-static int videobuf_dvb_stop_feed(struct dvb_demux_feed *feed)
-{
- struct dvb_demux *demux = feed->demux;
- struct videobuf_dvb *dvb = demux->priv;
- int err = 0;
-
- mutex_lock(&dvb->lock);
- dvb->nfeeds--;
- if (0 == dvb->nfeeds && NULL != dvb->thread) {
- err = kthread_stop(dvb->thread);
- dvb->thread = NULL;
- }
- mutex_unlock(&dvb->lock);
- return err;
-}
-
-static int videobuf_dvb_register_adapter(struct videobuf_dvb_frontends *fe,
- struct module *module,
- void *adapter_priv,
- struct device *device,
- char *adapter_name,
- short *adapter_nr,
- int mfe_shared)
-{
- int result;
-
- mutex_init(&fe->lock);
-
- /* register adapter */
- result = dvb_register_adapter(&fe->adapter, adapter_name, module,
- device, adapter_nr);
- if (result < 0) {
- printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
- adapter_name, result);
- }
- fe->adapter.priv = adapter_priv;
- fe->adapter.mfe_shared = mfe_shared;
-
- return result;
-}
-
-static int videobuf_dvb_register_frontend(struct dvb_adapter *adapter,
- struct videobuf_dvb *dvb)
-{
- int result;
-
- /* register frontend */
- result = dvb_register_frontend(adapter, dvb->frontend);
- if (result < 0) {
- printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
- dvb->name, result);
- goto fail_frontend;
- }
-
- /* register demux stuff */
- dvb->demux.dmx.capabilities =
- DMX_TS_FILTERING | DMX_SECTION_FILTERING |
- DMX_MEMORY_BASED_FILTERING;
- dvb->demux.priv = dvb;
- dvb->demux.filternum = 256;
- dvb->demux.feednum = 256;
- dvb->demux.start_feed = videobuf_dvb_start_feed;
- dvb->demux.stop_feed = videobuf_dvb_stop_feed;
- result = dvb_dmx_init(&dvb->demux);
- if (result < 0) {
- printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
- dvb->name, result);
- goto fail_dmx;
- }
-
- dvb->dmxdev.filternum = 256;
- dvb->dmxdev.demux = &dvb->demux.dmx;
- dvb->dmxdev.capabilities = 0;
- result = dvb_dmxdev_init(&dvb->dmxdev, adapter);
-
- if (result < 0) {
- printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
- dvb->name, result);
- goto fail_dmxdev;
- }
-
- dvb->fe_hw.source = DMX_FRONTEND_0;
- result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
- if (result < 0) {
- printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
- dvb->name, result);
- goto fail_fe_hw;
- }
-
- dvb->fe_mem.source = DMX_MEMORY_FE;
- result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
- if (result < 0) {
- printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
- dvb->name, result);
- goto fail_fe_mem;
- }
-
- result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
- if (result < 0) {
- printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
- dvb->name, result);
- goto fail_fe_conn;
- }
-
- /* register network adapter */
- result = dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx);
- if (result < 0) {
- printk(KERN_WARNING "%s: dvb_net_init failed (errno = %d)\n",
- dvb->name, result);
- goto fail_fe_conn;
- }
- return 0;
-
-fail_fe_conn:
- dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
-fail_fe_mem:
- dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
-fail_fe_hw:
- dvb_dmxdev_release(&dvb->dmxdev);
-fail_dmxdev:
- dvb_dmx_release(&dvb->demux);
-fail_dmx:
- dvb_unregister_frontend(dvb->frontend);
-fail_frontend:
- dvb_frontend_detach(dvb->frontend);
- dvb->frontend = NULL;
-
- return result;
-}
-
-/* ------------------------------------------------------------------ */
-/* Register a single adapter and one or more frontends */
-int videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f,
- struct module *module,
- void *adapter_priv,
- struct device *device,
- short *adapter_nr,
- int mfe_shared)
-{
- struct list_head *list, *q;
- struct videobuf_dvb_frontend *fe;
- int res;
-
- fe = videobuf_dvb_get_frontend(f, 1);
- if (!fe) {
- printk(KERN_WARNING "Unable to register the adapter which has no frontends\n");
- return -EINVAL;
- }
-
- /* Bring up the adapter */
- res = videobuf_dvb_register_adapter(f, module, adapter_priv, device,
- fe->dvb.name, adapter_nr, mfe_shared);
- if (res < 0) {
- printk(KERN_WARNING "videobuf_dvb_register_adapter failed (errno = %d)\n", res);
- return res;
- }
-
- /* Attach all of the frontends to the adapter */
- mutex_lock(&f->lock);
- list_for_each_safe(list, q, &f->felist) {
- fe = list_entry(list, struct videobuf_dvb_frontend, felist);
- res = videobuf_dvb_register_frontend(&f->adapter, &fe->dvb);
- if (res < 0) {
- printk(KERN_WARNING "%s: videobuf_dvb_register_frontend failed (errno = %d)\n",
- fe->dvb.name, res);
- goto err;
- }
- }
- mutex_unlock(&f->lock);
- return 0;
-
-err:
- mutex_unlock(&f->lock);
- videobuf_dvb_unregister_bus(f);
- return res;
-}
-EXPORT_SYMBOL(videobuf_dvb_register_bus);
-
-void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f)
-{
- videobuf_dvb_dealloc_frontends(f);
-
- dvb_unregister_adapter(&f->adapter);
-}
-EXPORT_SYMBOL(videobuf_dvb_unregister_bus);
-
-struct videobuf_dvb_frontend *videobuf_dvb_get_frontend(
- struct videobuf_dvb_frontends *f, int id)
-{
- struct list_head *list, *q;
- struct videobuf_dvb_frontend *fe, *ret = NULL;
-
- mutex_lock(&f->lock);
-
- list_for_each_safe(list, q, &f->felist) {
- fe = list_entry(list, struct videobuf_dvb_frontend, felist);
- if (fe->id == id) {
- ret = fe;
- break;
- }
- }
-
- mutex_unlock(&f->lock);
-
- return ret;
-}
-EXPORT_SYMBOL(videobuf_dvb_get_frontend);
-
-int videobuf_dvb_find_frontend(struct videobuf_dvb_frontends *f,
- struct dvb_frontend *p)
-{
- struct list_head *list, *q;
- struct videobuf_dvb_frontend *fe = NULL;
- int ret = 0;
-
- mutex_lock(&f->lock);
-
- list_for_each_safe(list, q, &f->felist) {
- fe = list_entry(list, struct videobuf_dvb_frontend, felist);
- if (fe->dvb.frontend == p) {
- ret = fe->id;
- break;
- }
- }
-
- mutex_unlock(&f->lock);
-
- return ret;
-}
-EXPORT_SYMBOL(videobuf_dvb_find_frontend);
-
-struct videobuf_dvb_frontend *videobuf_dvb_alloc_frontend(
- struct videobuf_dvb_frontends *f, int id)
-{
- struct videobuf_dvb_frontend *fe;
-
- fe = kzalloc(sizeof(struct videobuf_dvb_frontend), GFP_KERNEL);
- if (fe == NULL)
- goto fail_alloc;
-
- fe->id = id;
- mutex_init(&fe->dvb.lock);
-
- mutex_lock(&f->lock);
- list_add_tail(&fe->felist, &f->felist);
- mutex_unlock(&f->lock);
-
-fail_alloc:
- return fe;
-}
-EXPORT_SYMBOL(videobuf_dvb_alloc_frontend);
-
-void videobuf_dvb_dealloc_frontends(struct videobuf_dvb_frontends *f)
-{
- struct list_head *list, *q;
- struct videobuf_dvb_frontend *fe;
-
- mutex_lock(&f->lock);
- list_for_each_safe(list, q, &f->felist) {
- fe = list_entry(list, struct videobuf_dvb_frontend, felist);
- if (fe->dvb.net.dvbdev) {
- dvb_net_release(&fe->dvb.net);
- fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx,
- &fe->dvb.fe_mem);
- fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx,
- &fe->dvb.fe_hw);
- dvb_dmxdev_release(&fe->dvb.dmxdev);
- dvb_dmx_release(&fe->dvb.demux);
- dvb_unregister_frontend(fe->dvb.frontend);
- }
- if (fe->dvb.frontend)
- /* always allocated, may have been reset */
- dvb_frontend_detach(fe->dvb.frontend);
- list_del(list); /* remove list entry */
- kfree(fe); /* free frontend allocation */
- }
- mutex_unlock(&f->lock);
-}
-EXPORT_SYMBOL(videobuf_dvb_dealloc_frontends);
projects / openwrt / staging / blogic.git / commitdiff