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89ee7f4f | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1899e97c DH |
2 | /* |
3 | * ngene-dvb.c: nGene PCIe bridge driver - DVB functions | |
4 | * | |
5 | * Copyright (C) 2005-2007 Micronas | |
6 | * | |
7 | * Copyright (C) 2008-2009 Ralph Metzler <rjkm@metzlerbros.de> | |
8 | * Modifications for new nGene firmware, | |
9 | * support for EEPROM-copying, | |
10 | * support for new dual DVB-S2 card prototype | |
1899e97c DH |
11 | */ |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/poll.h> | |
18 | #include <linux/io.h> | |
19 | #include <asm/div64.h> | |
20 | #include <linux/pci.h> | |
1899e97c | 21 | #include <linux/timer.h> |
1899e97c DH |
22 | #include <linux/byteorder/generic.h> |
23 | #include <linux/firmware.h> | |
24 | #include <linux/vmalloc.h> | |
25 | ||
26 | #include "ngene.h" | |
27 | ||
60d0bbec DS |
28 | static int ci_tsfix = 1; |
29 | module_param(ci_tsfix, int, 0444); | |
87a06379 | 30 | MODULE_PARM_DESC(ci_tsfix, "Detect and fix TS buffer offset shifts in conjunction with CI expansions (default: 1/enabled)"); |
1899e97c DH |
31 | |
32 | /****************************************************************************/ | |
33 | /* COMMAND API interface ****************************************************/ | |
34 | /****************************************************************************/ | |
35 | ||
c463c979 | 36 | static ssize_t ts_write(struct file *file, const char __user *buf, |
0f0b270f RM |
37 | size_t count, loff_t *ppos) |
38 | { | |
39 | struct dvb_device *dvbdev = file->private_data; | |
40 | struct ngene_channel *chan = dvbdev->priv; | |
41 | struct ngene *dev = chan->dev; | |
42 | ||
43 | if (wait_event_interruptible(dev->tsout_rbuf.queue, | |
44 | dvb_ringbuffer_free | |
45 | (&dev->tsout_rbuf) >= count) < 0) | |
46 | return 0; | |
47 | ||
04da2dae | 48 | dvb_ringbuffer_write_user(&dev->tsout_rbuf, buf, count); |
0f0b270f RM |
49 | |
50 | return count; | |
51 | } | |
52 | ||
c463c979 | 53 | static ssize_t ts_read(struct file *file, char __user *buf, |
0f0b270f RM |
54 | size_t count, loff_t *ppos) |
55 | { | |
56 | struct dvb_device *dvbdev = file->private_data; | |
57 | struct ngene_channel *chan = dvbdev->priv; | |
58 | struct ngene *dev = chan->dev; | |
59 | int left, avail; | |
60 | ||
61 | left = count; | |
62 | while (left) { | |
63 | if (wait_event_interruptible( | |
64 | dev->tsin_rbuf.queue, | |
65 | dvb_ringbuffer_avail(&dev->tsin_rbuf) > 0) < 0) | |
66 | return -EAGAIN; | |
67 | avail = dvb_ringbuffer_avail(&dev->tsin_rbuf); | |
68 | if (avail > left) | |
69 | avail = left; | |
70 | dvb_ringbuffer_read_user(&dev->tsin_rbuf, buf, avail); | |
71 | left -= avail; | |
72 | buf += avail; | |
73 | } | |
74 | return count; | |
75 | } | |
76 | ||
6294513d DS |
77 | static __poll_t ts_poll(struct file *file, poll_table *wait) |
78 | { | |
79 | struct dvb_device *dvbdev = file->private_data; | |
80 | struct ngene_channel *chan = dvbdev->priv; | |
81 | struct ngene *dev = chan->dev; | |
82 | struct dvb_ringbuffer *rbuf = &dev->tsin_rbuf; | |
83 | struct dvb_ringbuffer *wbuf = &dev->tsout_rbuf; | |
84 | __poll_t mask = 0; | |
85 | ||
86 | poll_wait(file, &rbuf->queue, wait); | |
87 | poll_wait(file, &wbuf->queue, wait); | |
88 | ||
89 | if (!dvb_ringbuffer_empty(rbuf)) | |
90 | mask |= EPOLLIN | EPOLLRDNORM; | |
91 | if (dvb_ringbuffer_free(wbuf) >= 188) | |
92 | mask |= EPOLLOUT | EPOLLWRNORM; | |
93 | ||
94 | return mask; | |
95 | } | |
96 | ||
0f0b270f RM |
97 | static const struct file_operations ci_fops = { |
98 | .owner = THIS_MODULE, | |
99 | .read = ts_read, | |
100 | .write = ts_write, | |
101 | .open = dvb_generic_open, | |
102 | .release = dvb_generic_release, | |
6294513d DS |
103 | .poll = ts_poll, |
104 | .mmap = NULL, | |
0f0b270f RM |
105 | }; |
106 | ||
107 | struct dvb_device ngene_dvbdev_ci = { | |
6294513d DS |
108 | .priv = NULL, |
109 | .readers = 1, | |
110 | .writers = 1, | |
111 | .users = 2, | |
0f0b270f RM |
112 | .fops = &ci_fops, |
113 | }; | |
114 | ||
115 | ||
1899e97c DH |
116 | /****************************************************************************/ |
117 | /* DVB functions and API interface ******************************************/ | |
118 | /****************************************************************************/ | |
119 | ||
120 | static void swap_buffer(u32 *p, u32 len) | |
121 | { | |
122 | while (len) { | |
123 | *p = swab32(*p); | |
124 | p++; | |
125 | len -= 4; | |
126 | } | |
127 | } | |
128 | ||
36e3fc89 OE |
129 | /* start of filler packet */ |
130 | static u8 fill_ts[] = { 0x47, 0x1f, 0xff, 0x10, TS_FILLER }; | |
131 | ||
60d0bbec DS |
132 | static int tsin_find_offset(void *buf, u32 len) |
133 | { | |
134 | int i, l; | |
135 | ||
136 | l = len - sizeof(fill_ts); | |
137 | if (l <= 0) | |
138 | return -1; | |
139 | ||
140 | for (i = 0; i < l; i++) { | |
141 | if (((char *)buf)[i] == 0x47) { | |
142 | if (!memcmp(buf + i, fill_ts, sizeof(fill_ts))) | |
143 | return i % 188; | |
144 | } | |
145 | } | |
146 | ||
147 | return -1; | |
148 | } | |
149 | ||
e5fc6767 DS |
150 | static inline void tsin_copy_stripped(struct ngene *dev, void *buf) |
151 | { | |
152 | if (memcmp(buf, fill_ts, sizeof(fill_ts)) != 0) { | |
153 | if (dvb_ringbuffer_free(&dev->tsin_rbuf) >= 188) { | |
154 | dvb_ringbuffer_write(&dev->tsin_rbuf, buf, 188); | |
155 | wake_up(&dev->tsin_rbuf.queue); | |
156 | } | |
157 | } | |
158 | } | |
36e3fc89 | 159 | |
1899e97c DH |
160 | void *tsin_exchange(void *priv, void *buf, u32 len, u32 clock, u32 flags) |
161 | { | |
162 | struct ngene_channel *chan = priv; | |
0f0b270f | 163 | struct ngene *dev = chan->dev; |
60d0bbec | 164 | int tsoff; |
1899e97c | 165 | |
0f0b270f RM |
166 | if (flags & DF_SWAP32) |
167 | swap_buffer(buf, len); | |
36e3fc89 | 168 | |
0f0b270f | 169 | if (dev->ci.en && chan->number == 2) { |
60d0bbec DS |
170 | /* blindly copy buffers if ci_tsfix is disabled */ |
171 | if (!ci_tsfix) { | |
172 | while (len >= 188) { | |
173 | tsin_copy_stripped(dev, buf); | |
174 | ||
175 | buf += 188; | |
176 | len -= 188; | |
177 | } | |
178 | return NULL; | |
179 | } | |
180 | ||
181 | /* ci_tsfix = 1 */ | |
182 | ||
183 | /* | |
184 | * since the remainder of the TS packet which got cut off | |
185 | * in the previous tsin_exchange() run is at the beginning | |
186 | * of the new TS buffer, append this to the temp buffer and | |
187 | * send it to the DVB ringbuffer afterwards. | |
188 | */ | |
189 | if (chan->tsin_offset) { | |
190 | memcpy(&chan->tsin_buffer[(188 - chan->tsin_offset)], | |
191 | buf, chan->tsin_offset); | |
192 | tsin_copy_stripped(dev, &chan->tsin_buffer); | |
193 | ||
194 | buf += chan->tsin_offset; | |
195 | len -= chan->tsin_offset; | |
196 | } | |
197 | ||
198 | /* | |
199 | * copy TS packets to the DVB ringbuffer and detect new offset | |
200 | * shifts by checking for a valid TS SYNC byte | |
201 | */ | |
36e3fc89 | 202 | while (len >= 188) { |
60d0bbec DS |
203 | if (*((char *)buf) != 0x47) { |
204 | /* | |
205 | * no SYNC header, find new offset shift | |
206 | * (max. 188 bytes, tsoff will be mod 188) | |
207 | */ | |
208 | tsoff = tsin_find_offset(buf, len); | |
209 | if (tsoff > 0) { | |
210 | chan->tsin_offset += tsoff; | |
211 | chan->tsin_offset %= 188; | |
212 | ||
213 | buf += tsoff; | |
214 | len -= tsoff; | |
215 | ||
216 | dev_info(&dev->pci_dev->dev, | |
217 | "%s(): tsin_offset shift by %d on channel %d\n", | |
218 | __func__, tsoff, | |
219 | chan->number); | |
220 | ||
221 | /* | |
222 | * offset corrected. re-check remaining | |
223 | * len for a full TS frame, break and | |
224 | * skip to fragment handling if < 188. | |
225 | */ | |
226 | if (len < 188) | |
227 | break; | |
228 | } | |
229 | } | |
230 | ||
e5fc6767 DS |
231 | tsin_copy_stripped(dev, buf); |
232 | ||
36e3fc89 OE |
233 | buf += 188; |
234 | len -= 188; | |
0f0b270f | 235 | } |
60d0bbec DS |
236 | |
237 | /* | |
238 | * if a fragment is left, copy to temp buffer. The remainder | |
239 | * will be appended in the next tsin_exchange() iteration. | |
240 | */ | |
241 | if (len > 0 && len < 188) | |
242 | memcpy(&chan->tsin_buffer, buf, len); | |
243 | ||
36e3fc89 | 244 | return NULL; |
0f0b270f | 245 | } |
36e3fc89 | 246 | |
9143a437 | 247 | if (chan->users > 0) |
1899e97c | 248 | dvb_dmx_swfilter(&chan->demux, buf, len); |
9143a437 | 249 | |
1899e97c DH |
250 | return NULL; |
251 | } | |
252 | ||
1899e97c DH |
253 | void *tsout_exchange(void *priv, void *buf, u32 len, u32 clock, u32 flags) |
254 | { | |
255 | struct ngene_channel *chan = priv; | |
256 | struct ngene *dev = chan->dev; | |
257 | u32 alen; | |
258 | ||
259 | alen = dvb_ringbuffer_avail(&dev->tsout_rbuf); | |
260 | alen -= alen % 188; | |
261 | ||
262 | if (alen < len) | |
263 | FillTSBuffer(buf + alen, len - alen, flags); | |
264 | else | |
265 | alen = len; | |
266 | dvb_ringbuffer_read(&dev->tsout_rbuf, buf, alen); | |
267 | if (flags & DF_SWAP32) | |
268 | swap_buffer((u32 *)buf, alen); | |
269 | wake_up_interruptible(&dev->tsout_rbuf.queue); | |
270 | return buf; | |
271 | } | |
272 | ||
273 | ||
274 | ||
275 | int ngene_start_feed(struct dvb_demux_feed *dvbdmxfeed) | |
276 | { | |
277 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; | |
278 | struct ngene_channel *chan = dvbdmx->priv; | |
279 | ||
280 | if (chan->users == 0) { | |
5a2a1848 | 281 | if (!chan->dev->cmd_timeout_workaround || !chan->running) |
1899e97c | 282 | set_transfer(chan, 1); |
1899e97c DH |
283 | } |
284 | ||
285 | return ++chan->users; | |
286 | } | |
287 | ||
288 | int ngene_stop_feed(struct dvb_demux_feed *dvbdmxfeed) | |
289 | { | |
290 | struct dvb_demux *dvbdmx = dvbdmxfeed->demux; | |
291 | struct ngene_channel *chan = dvbdmx->priv; | |
292 | ||
293 | if (--chan->users) | |
294 | return chan->users; | |
295 | ||
5a2a1848 OE |
296 | if (!chan->dev->cmd_timeout_workaround) |
297 | set_transfer(chan, 0); | |
1899e97c DH |
298 | |
299 | return 0; | |
300 | } | |
301 | ||
302 | int my_dvb_dmx_ts_card_init(struct dvb_demux *dvbdemux, char *id, | |
303 | int (*start_feed)(struct dvb_demux_feed *), | |
304 | int (*stop_feed)(struct dvb_demux_feed *), | |
305 | void *priv) | |
306 | { | |
307 | dvbdemux->priv = priv; | |
308 | ||
309 | dvbdemux->filternum = 256; | |
310 | dvbdemux->feednum = 256; | |
311 | dvbdemux->start_feed = start_feed; | |
312 | dvbdemux->stop_feed = stop_feed; | |
313 | dvbdemux->write_to_decoder = NULL; | |
314 | dvbdemux->dmx.capabilities = (DMX_TS_FILTERING | | |
315 | DMX_SECTION_FILTERING | | |
316 | DMX_MEMORY_BASED_FILTERING); | |
317 | return dvb_dmx_init(dvbdemux); | |
318 | } | |
319 | ||
320 | int my_dvb_dmxdev_ts_card_init(struct dmxdev *dmxdev, | |
321 | struct dvb_demux *dvbdemux, | |
322 | struct dmx_frontend *hw_frontend, | |
323 | struct dmx_frontend *mem_frontend, | |
324 | struct dvb_adapter *dvb_adapter) | |
325 | { | |
326 | int ret; | |
327 | ||
328 | dmxdev->filternum = 256; | |
329 | dmxdev->demux = &dvbdemux->dmx; | |
330 | dmxdev->capabilities = 0; | |
331 | ret = dvb_dmxdev_init(dmxdev, dvb_adapter); | |
332 | if (ret < 0) | |
333 | return ret; | |
334 | ||
335 | hw_frontend->source = DMX_FRONTEND_0; | |
336 | dvbdemux->dmx.add_frontend(&dvbdemux->dmx, hw_frontend); | |
337 | mem_frontend->source = DMX_MEMORY_FE; | |
338 | dvbdemux->dmx.add_frontend(&dvbdemux->dmx, mem_frontend); | |
339 | return dvbdemux->dmx.connect_frontend(&dvbdemux->dmx, hw_frontend); | |
340 | } |