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Diffstat (limited to 'drivers/media/dvb/ngene/ngene-dvb.c')
-rw-r--r--drivers/media/dvb/ngene/ngene-dvb.c261
1 files changed, 261 insertions, 0 deletions
diff --git a/drivers/media/dvb/ngene/ngene-dvb.c b/drivers/media/dvb/ngene/ngene-dvb.c
new file mode 100644
index 00000000000..fcb16a615aa
--- /dev/null
+++ b/drivers/media/dvb/ngene/ngene-dvb.c
@@ -0,0 +1,261 @@
1/*
2 * ngene-dvb.c: nGene PCIe bridge driver - DVB functions
3 *
4 * Copyright (C) 2005-2007 Micronas
5 *
6 * Copyright (C) 2008-2009 Ralph Metzler <rjkm@metzlerbros.de>
7 * Modifications for new nGene firmware,
8 * support for EEPROM-copying,
9 * support for new dual DVB-S2 card prototype
10 *
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * version 2 only, as published by the Free Software Foundation.
15 *
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
26 * 02110-1301, USA
27 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
28 */
29
30#include <linux/module.h>
31#include <linux/init.h>
32#include <linux/delay.h>
33#include <linux/slab.h>
34#include <linux/poll.h>
35#include <linux/io.h>
36#include <asm/div64.h>
37#include <linux/pci.h>
38#include <linux/timer.h>
39#include <linux/byteorder/generic.h>
40#include <linux/firmware.h>
41#include <linux/vmalloc.h>
42
43#include "ngene.h"
44
45
46/****************************************************************************/
47/* COMMAND API interface ****************************************************/
48/****************************************************************************/
49
50static ssize_t ts_write(struct file *file, const char *buf,
51 size_t count, loff_t *ppos)
52{
53 struct dvb_device *dvbdev = file->private_data;
54 struct ngene_channel *chan = dvbdev->priv;
55 struct ngene *dev = chan->dev;
56
57 if (wait_event_interruptible(dev->tsout_rbuf.queue,
58 dvb_ringbuffer_free
59 (&dev->tsout_rbuf) >= count) < 0)
60 return 0;
61
62 dvb_ringbuffer_write(&dev->tsout_rbuf, buf, count);
63
64 return count;
65}
66
67static ssize_t ts_read(struct file *file, char *buf,
68 size_t count, loff_t *ppos)
69{
70 struct dvb_device *dvbdev = file->private_data;
71 struct ngene_channel *chan = dvbdev->priv;
72 struct ngene *dev = chan->dev;
73 int left, avail;
74
75 left = count;
76 while (left) {
77 if (wait_event_interruptible(
78 dev->tsin_rbuf.queue,
79 dvb_ringbuffer_avail(&dev->tsin_rbuf) > 0) < 0)
80 return -EAGAIN;
81 avail = dvb_ringbuffer_avail(&dev->tsin_rbuf);
82 if (avail > left)
83 avail = left;
84 dvb_ringbuffer_read_user(&dev->tsin_rbuf, buf, avail);
85 left -= avail;
86 buf += avail;
87 }
88 return count;
89}
90
91static const struct file_operations ci_fops = {
92 .owner = THIS_MODULE,
93 .read = ts_read,
94 .write = ts_write,
95 .open = dvb_generic_open,
96 .release = dvb_generic_release,
97};
98
99struct dvb_device ngene_dvbdev_ci = {
100 .priv = 0,
101 .readers = -1,
102 .writers = -1,
103 .users = -1,
104 .fops = &ci_fops,
105};
106
107
108/****************************************************************************/
109/* DVB functions and API interface ******************************************/
110/****************************************************************************/
111
112static void swap_buffer(u32 *p, u32 len)
113{
114 while (len) {
115 *p = swab32(*p);
116 p++;
117 len -= 4;
118 }
119}
120
121/* start of filler packet */
122static u8 fill_ts[] = { 0x47, 0x1f, 0xff, 0x10, TS_FILLER };
123
124/* #define DEBUG_CI_XFER */
125#ifdef DEBUG_CI_XFER
126static u32 ok;
127static u32 overflow;
128static u32 stripped;
129#endif
130
131void *tsin_exchange(void *priv, void *buf, u32 len, u32 clock, u32 flags)
132{
133 struct ngene_channel *chan = priv;
134 struct ngene *dev = chan->dev;
135
136
137 if (flags & DF_SWAP32)
138 swap_buffer(buf, len);
139
140 if (dev->ci.en && chan->number == 2) {
141 while (len >= 188) {
142 if (memcmp(buf, fill_ts, sizeof fill_ts) != 0) {
143 if (dvb_ringbuffer_free(&dev->tsin_rbuf) >= 188) {
144 dvb_ringbuffer_write(&dev->tsin_rbuf, buf, 188);
145 wake_up(&dev->tsin_rbuf.queue);
146#ifdef DEBUG_CI_XFER
147 ok++;
148#endif
149 }
150#ifdef DEBUG_CI_XFER
151 else
152 overflow++;
153#endif
154 }
155#ifdef DEBUG_CI_XFER
156 else
157 stripped++;
158
159 if (ok % 100 == 0 && overflow)
160 printk(KERN_WARNING "%s: ok %u overflow %u dropped %u\n", __func__, ok, overflow, stripped);
161#endif
162 buf += 188;
163 len -= 188;
164 }
165 return NULL;
166 }
167
168 if (chan->users > 0)
169 dvb_dmx_swfilter(&chan->demux, buf, len);
170
171 return NULL;
172}
173
174void *tsout_exchange(void *priv, void *buf, u32 len, u32 clock, u32 flags)
175{
176 struct ngene_channel *chan = priv;
177 struct ngene *dev = chan->dev;
178 u32 alen;
179
180 alen = dvb_ringbuffer_avail(&dev->tsout_rbuf);
181 alen -= alen % 188;
182
183 if (alen < len)
184 FillTSBuffer(buf + alen, len - alen, flags);
185 else
186 alen = len;
187 dvb_ringbuffer_read(&dev->tsout_rbuf, buf, alen);
188 if (flags & DF_SWAP32)
189 swap_buffer((u32 *)buf, alen);
190 wake_up_interruptible(&dev->tsout_rbuf.queue);
191 return buf;
192}
193
194
195
196int ngene_start_feed(struct dvb_demux_feed *dvbdmxfeed)
197{
198 struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
199 struct ngene_channel *chan = dvbdmx->priv;
200
201 if (chan->users == 0) {
202 if (!chan->dev->cmd_timeout_workaround || !chan->running)
203 set_transfer(chan, 1);
204 }
205
206 return ++chan->users;
207}
208
209int ngene_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
210{
211 struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
212 struct ngene_channel *chan = dvbdmx->priv;
213
214 if (--chan->users)
215 return chan->users;
216
217 if (!chan->dev->cmd_timeout_workaround)
218 set_transfer(chan, 0);
219
220 return 0;
221}
222
223int my_dvb_dmx_ts_card_init(struct dvb_demux *dvbdemux, char *id,
224 int (*start_feed)(struct dvb_demux_feed *),
225 int (*stop_feed)(struct dvb_demux_feed *),
226 void *priv)
227{
228 dvbdemux->priv = priv;
229
230 dvbdemux->filternum = 256;
231 dvbdemux->feednum = 256;
232 dvbdemux->start_feed = start_feed;
233 dvbdemux->stop_feed = stop_feed;
234 dvbdemux->write_to_decoder = NULL;
235 dvbdemux->dmx.capabilities = (DMX_TS_FILTERING |
236 DMX_SECTION_FILTERING |
237 DMX_MEMORY_BASED_FILTERING);
238 return dvb_dmx_init(dvbdemux);
239}
240
241int my_dvb_dmxdev_ts_card_init(struct dmxdev *dmxdev,
242 struct dvb_demux *dvbdemux,
243 struct dmx_frontend *hw_frontend,
244 struct dmx_frontend *mem_frontend,
245 struct dvb_adapter *dvb_adapter)
246{
247 int ret;
248
249 dmxdev->filternum = 256;
250 dmxdev->demux = &dvbdemux->dmx;
251 dmxdev->capabilities = 0;
252 ret = dvb_dmxdev_init(dmxdev, dvb_adapter);
253 if (ret < 0)
254 return ret;
255
256 hw_frontend->source = DMX_FRONTEND_0;
257 dvbdemux->dmx.add_frontend(&dvbdemux->dmx, hw_frontend);
258 mem_frontend->source = DMX_MEMORY_FE;
259 dvbdemux->dmx.add_frontend(&dvbdemux->dmx, mem_frontend);
260 return dvbdemux->dmx.connect_frontend(&dvbdemux->dmx, hw_frontend);
261}
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