diff options
Diffstat (limited to 'drivers/media/pci/ngene/ngene-dvb.c')
| -rw-r--r-- | drivers/media/pci/ngene/ngene-dvb.c | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/drivers/media/pci/ngene/ngene-dvb.c b/drivers/media/pci/ngene/ngene-dvb.c new file mode 100644 index 000000000000..fcb16a615aab --- /dev/null +++ b/drivers/media/pci/ngene/ngene-dvb.c @@ -0,0 +1,261 @@ +/* + * ngene-dvb.c: nGene PCIe bridge driver - DVB functions + * + * Copyright (C) 2005-2007 Micronas + * + * Copyright (C) 2008-2009 Ralph Metzler <rjkm@metzlerbros.de> + * Modifications for new nGene firmware, + * support for EEPROM-copying, + * support for new dual DVB-S2 card prototype + * + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 only, as published by the Free Software Foundation. + * + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + * Or, point your browser to http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/poll.h> +#include <linux/io.h> +#include <asm/div64.h> +#include <linux/pci.h> +#include <linux/timer.h> +#include <linux/byteorder/generic.h> +#include <linux/firmware.h> +#include <linux/vmalloc.h> + +#include "ngene.h" + + +/****************************************************************************/ +/* COMMAND API interface ****************************************************/ +/****************************************************************************/ + +static ssize_t ts_write(struct file *file, const char *buf, + size_t count, loff_t *ppos) +{ + struct dvb_device *dvbdev = file->private_data; + struct ngene_channel *chan = dvbdev->priv; + struct ngene *dev = chan->dev; + + if (wait_event_interruptible(dev->tsout_rbuf.queue, + dvb_ringbuffer_free + (&dev->tsout_rbuf) >= count) < 0) + return 0; + + dvb_ringbuffer_write(&dev->tsout_rbuf, buf, count); + + return count; +} + +static ssize_t ts_read(struct file *file, char *buf, + size_t count, loff_t *ppos) +{ + struct dvb_device *dvbdev = file->private_data; + struct ngene_channel *chan = dvbdev->priv; + struct ngene *dev = chan->dev; + int left, avail; + + left = count; + while (left) { + if (wait_event_interruptible( + dev->tsin_rbuf.queue, + dvb_ringbuffer_avail(&dev->tsin_rbuf) > 0) < 0) + return -EAGAIN; + avail = dvb_ringbuffer_avail(&dev->tsin_rbuf); + if (avail > left) + avail = left; + dvb_ringbuffer_read_user(&dev->tsin_rbuf, buf, avail); + left -= avail; + buf += avail; + } + return count; +} + +static const struct file_operations ci_fops = { + .owner = THIS_MODULE, + .read = ts_read, + .write = ts_write, + .open = dvb_generic_open, + .release = dvb_generic_release, +}; + +struct dvb_device ngene_dvbdev_ci = { + .priv = 0, + .readers = -1, + .writers = -1, + .users = -1, + .fops = &ci_fops, +}; + + +/****************************************************************************/ +/* DVB functions and API interface ******************************************/ +/****************************************************************************/ + +static void swap_buffer(u32 *p, u32 len) +{ + while (len) { + *p = swab32(*p); + p++; + len -= 4; + } +} + +/* start of filler packet */ +static u8 fill_ts[] = { 0x47, 0x1f, 0xff, 0x10, TS_FILLER }; + +/* #define DEBUG_CI_XFER */ +#ifdef DEBUG_CI_XFER +static u32 ok; +static u32 overflow; +static u32 stripped; +#endif + +void *tsin_exchange(void *priv, void *buf, u32 len, u32 clock, u32 flags) +{ + struct ngene_channel *chan = priv; + struct ngene *dev = chan->dev; + + + if (flags & DF_SWAP32) + swap_buffer(buf, len); + + if (dev->ci.en && chan->number == 2) { + while (len >= 188) { + if (memcmp(buf, fill_ts, sizeof fill_ts) != 0) { + if (dvb_ringbuffer_free(&dev->tsin_rbuf) >= 188) { + dvb_ringbuffer_write(&dev->tsin_rbuf, buf, 188); + wake_up(&dev->tsin_rbuf.queue); +#ifdef DEBUG_CI_XFER + ok++; +#endif + } +#ifdef DEBUG_CI_XFER + else + overflow++; +#endif + } +#ifdef DEBUG_CI_XFER + else + stripped++; + + if (ok % 100 == 0 && overflow) + printk(KERN_WARNING "%s: ok %u overflow %u dropped %u\n", __func__, ok, overflow, stripped); +#endif + buf += 188; + len -= 188; + } + return NULL; + } + + if (chan->users > 0) + dvb_dmx_swfilter(&chan->demux, buf, len); + + return NULL; +} + +void *tsout_exchange(void *priv, void *buf, u32 len, u32 clock, u32 flags) +{ + struct ngene_channel *chan = priv; + struct ngene *dev = chan->dev; + u32 alen; + + alen = dvb_ringbuffer_avail(&dev->tsout_rbuf); + alen -= alen % 188; + + if (alen < len) + FillTSBuffer(buf + alen, len - alen, flags); + else + alen = len; + dvb_ringbuffer_read(&dev->tsout_rbuf, buf, alen); + if (flags & DF_SWAP32) + swap_buffer((u32 *)buf, alen); + wake_up_interruptible(&dev->tsout_rbuf.queue); + return buf; +} + + + +int ngene_start_feed(struct dvb_demux_feed *dvbdmxfeed) +{ + struct dvb_demux *dvbdmx = dvbdmxfeed->demux; + struct ngene_channel *chan = dvbdmx->priv; + + if (chan->users == 0) { + if (!chan->dev->cmd_timeout_workaround || !chan->running) + set_transfer(chan, 1); + } + + return ++chan->users; +} + +int ngene_stop_feed(struct dvb_demux_feed *dvbdmxfeed) +{ + struct dvb_demux *dvbdmx = dvbdmxfeed->demux; + struct ngene_channel *chan = dvbdmx->priv; + + if (--chan->users) + return chan->users; + + if (!chan->dev->cmd_timeout_workaround) + set_transfer(chan, 0); + + return 0; +} + +int my_dvb_dmx_ts_card_init(struct dvb_demux *dvbdemux, char *id, + int (*start_feed)(struct dvb_demux_feed *), + int (*stop_feed)(struct dvb_demux_feed *), + void *priv) +{ + dvbdemux->priv = priv; + + dvbdemux->filternum = 256; + dvbdemux->feednum = 256; + dvbdemux->start_feed = start_feed; + dvbdemux->stop_feed = stop_feed; + dvbdemux->write_to_decoder = NULL; + dvbdemux->dmx.capabilities = (DMX_TS_FILTERING | + DMX_SECTION_FILTERING | + DMX_MEMORY_BASED_FILTERING); + return dvb_dmx_init(dvbdemux); +} + +int my_dvb_dmxdev_ts_card_init(struct dmxdev *dmxdev, + struct dvb_demux *dvbdemux, + struct dmx_frontend *hw_frontend, + struct dmx_frontend *mem_frontend, + struct dvb_adapter *dvb_adapter) +{ + int ret; + + dmxdev->filternum = 256; + dmxdev->demux = &dvbdemux->dmx; + dmxdev->capabilities = 0; + ret = dvb_dmxdev_init(dmxdev, dvb_adapter); + if (ret < 0) + return ret; + + hw_frontend->source = DMX_FRONTEND_0; + dvbdemux->dmx.add_frontend(&dvbdemux->dmx, hw_frontend); + mem_frontend->source = DMX_MEMORY_FE; + dvbdemux->dmx.add_frontend(&dvbdemux->dmx, mem_frontend); + return dvbdemux->dmx.connect_frontend(&dvbdemux->dmx, hw_frontend); +} |