mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-25 02:09:42 +00:00
![Mauro Carvalho Chehab](/assets/img/avatar_default.png)
Allow devices to pass an optional argument to register the DVB driver at the media controller. Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
345 lines
8.4 KiB
C
345 lines
8.4 KiB
C
/*
|
|
*
|
|
* 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/slab.h>
|
|
|
|
#include <media/videobuf2-dvb.h>
|
|
|
|
/* ------------------------------------------------------------------ */
|
|
|
|
MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/* ------------------------------------------------------------------ */
|
|
|
|
static int dvb_fnc(struct vb2_buffer *vb, void *priv)
|
|
{
|
|
struct vb2_dvb *dvb = priv;
|
|
|
|
dvb_dmx_swfilter(&dvb->demux, vb2_plane_vaddr(vb, 0),
|
|
vb2_get_plane_payload(vb, 0));
|
|
return 0;
|
|
}
|
|
|
|
static int vb2_dvb_start_feed(struct dvb_demux_feed *feed)
|
|
{
|
|
struct dvb_demux *demux = feed->demux;
|
|
struct vb2_dvb *dvb = demux->priv;
|
|
int rc = 0;
|
|
|
|
if (!demux->dmx.frontend)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&dvb->lock);
|
|
dvb->nfeeds++;
|
|
|
|
if (!dvb->dvbq.threadio) {
|
|
rc = vb2_thread_start(&dvb->dvbq, dvb_fnc, dvb, dvb->name);
|
|
if (rc)
|
|
dvb->nfeeds--;
|
|
}
|
|
if (!rc)
|
|
rc = dvb->nfeeds;
|
|
mutex_unlock(&dvb->lock);
|
|
return rc;
|
|
}
|
|
|
|
static int vb2_dvb_stop_feed(struct dvb_demux_feed *feed)
|
|
{
|
|
struct dvb_demux *demux = feed->demux;
|
|
struct vb2_dvb *dvb = demux->priv;
|
|
int err = 0;
|
|
|
|
mutex_lock(&dvb->lock);
|
|
dvb->nfeeds--;
|
|
if (0 == dvb->nfeeds)
|
|
err = vb2_thread_stop(&dvb->dvbq);
|
|
mutex_unlock(&dvb->lock);
|
|
return err;
|
|
}
|
|
|
|
static int vb2_dvb_register_adapter(struct vb2_dvb_frontends *fe,
|
|
struct module *module,
|
|
void *adapter_priv,
|
|
struct device *device,
|
|
struct media_device *mdev,
|
|
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) {
|
|
pr_warn("%s: dvb_register_adapter failed (errno = %d)\n",
|
|
adapter_name, result);
|
|
}
|
|
fe->adapter.priv = adapter_priv;
|
|
fe->adapter.mfe_shared = mfe_shared;
|
|
#ifdef CONFIG_MEDIA_CONTROLLER_DVB
|
|
if (mdev)
|
|
fe->adapter.mdev = mdev;
|
|
#endif
|
|
return result;
|
|
}
|
|
|
|
static int vb2_dvb_register_frontend(struct dvb_adapter *adapter,
|
|
struct vb2_dvb *dvb)
|
|
{
|
|
int result;
|
|
|
|
/* register frontend */
|
|
result = dvb_register_frontend(adapter, dvb->frontend);
|
|
if (result < 0) {
|
|
pr_warn("%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 = vb2_dvb_start_feed;
|
|
dvb->demux.stop_feed = vb2_dvb_stop_feed;
|
|
result = dvb_dmx_init(&dvb->demux);
|
|
if (result < 0) {
|
|
pr_warn("%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) {
|
|
pr_warn("%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) {
|
|
pr_warn("%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) {
|
|
pr_warn("%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) {
|
|
pr_warn("%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) {
|
|
pr_warn("%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 vb2_dvb_register_bus(struct vb2_dvb_frontends *f,
|
|
struct module *module,
|
|
void *adapter_priv,
|
|
struct device *device,
|
|
struct media_device *mdev,
|
|
short *adapter_nr,
|
|
int mfe_shared)
|
|
{
|
|
struct list_head *list, *q;
|
|
struct vb2_dvb_frontend *fe;
|
|
int res;
|
|
|
|
fe = vb2_dvb_get_frontend(f, 1);
|
|
if (!fe) {
|
|
pr_warn("Unable to register the adapter which has no frontends\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Bring up the adapter */
|
|
res = vb2_dvb_register_adapter(f, module, adapter_priv, device, mdev,
|
|
fe->dvb.name, adapter_nr, mfe_shared);
|
|
if (res < 0) {
|
|
pr_warn("vb2_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 vb2_dvb_frontend, felist);
|
|
res = vb2_dvb_register_frontend(&f->adapter, &fe->dvb);
|
|
if (res < 0) {
|
|
pr_warn("%s: vb2_dvb_register_frontend failed (errno = %d)\n",
|
|
fe->dvb.name, res);
|
|
goto err;
|
|
}
|
|
res = dvb_create_media_graph(&f->adapter, false);
|
|
if (res < 0)
|
|
goto err;
|
|
}
|
|
|
|
mutex_unlock(&f->lock);
|
|
return 0;
|
|
|
|
err:
|
|
mutex_unlock(&f->lock);
|
|
vb2_dvb_unregister_bus(f);
|
|
return res;
|
|
}
|
|
EXPORT_SYMBOL(vb2_dvb_register_bus);
|
|
|
|
void vb2_dvb_unregister_bus(struct vb2_dvb_frontends *f)
|
|
{
|
|
vb2_dvb_dealloc_frontends(f);
|
|
|
|
dvb_unregister_adapter(&f->adapter);
|
|
}
|
|
EXPORT_SYMBOL(vb2_dvb_unregister_bus);
|
|
|
|
struct vb2_dvb_frontend *vb2_dvb_get_frontend(
|
|
struct vb2_dvb_frontends *f, int id)
|
|
{
|
|
struct list_head *list, *q;
|
|
struct vb2_dvb_frontend *fe, *ret = NULL;
|
|
|
|
mutex_lock(&f->lock);
|
|
|
|
list_for_each_safe(list, q, &f->felist) {
|
|
fe = list_entry(list, struct vb2_dvb_frontend, felist);
|
|
if (fe->id == id) {
|
|
ret = fe;
|
|
break;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&f->lock);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(vb2_dvb_get_frontend);
|
|
|
|
int vb2_dvb_find_frontend(struct vb2_dvb_frontends *f,
|
|
struct dvb_frontend *p)
|
|
{
|
|
struct list_head *list, *q;
|
|
struct vb2_dvb_frontend *fe = NULL;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&f->lock);
|
|
|
|
list_for_each_safe(list, q, &f->felist) {
|
|
fe = list_entry(list, struct vb2_dvb_frontend, felist);
|
|
if (fe->dvb.frontend == p) {
|
|
ret = fe->id;
|
|
break;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&f->lock);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(vb2_dvb_find_frontend);
|
|
|
|
struct vb2_dvb_frontend *vb2_dvb_alloc_frontend(
|
|
struct vb2_dvb_frontends *f, int id)
|
|
{
|
|
struct vb2_dvb_frontend *fe;
|
|
|
|
fe = kzalloc(sizeof(struct vb2_dvb_frontend), GFP_KERNEL);
|
|
if (fe == NULL)
|
|
return NULL;
|
|
|
|
fe->id = id;
|
|
mutex_init(&fe->dvb.lock);
|
|
|
|
mutex_lock(&f->lock);
|
|
list_add_tail(&fe->felist, &f->felist);
|
|
mutex_unlock(&f->lock);
|
|
return fe;
|
|
}
|
|
EXPORT_SYMBOL(vb2_dvb_alloc_frontend);
|
|
|
|
void vb2_dvb_dealloc_frontends(struct vb2_dvb_frontends *f)
|
|
{
|
|
struct list_head *list, *q;
|
|
struct vb2_dvb_frontend *fe;
|
|
|
|
mutex_lock(&f->lock);
|
|
list_for_each_safe(list, q, &f->felist) {
|
|
fe = list_entry(list, struct vb2_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(vb2_dvb_dealloc_frontends);
|