diff options
Diffstat (limited to 'drivers/media/v4l2-core/videobuf2-dvb.c')
-rw-r--r-- | drivers/media/v4l2-core/videobuf2-dvb.c | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-dvb.c b/drivers/media/v4l2-core/videobuf2-dvb.c new file mode 100644 index 000000000000..d09269846b7e --- /dev/null +++ b/drivers/media/v4l2-core/videobuf2-dvb.c @@ -0,0 +1,336 @@ +/* + * + * 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, + 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; + + 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, + 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, + 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; + } + } + 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); 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