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23#include <linux/init.h>
24#include <linux/list.h>
25#include <linux/module.h>
26#include <linux/kernel.h>
27#include <linux/slab.h>
28#include <linux/delay.h>
29
30#include "saa7134-reg.h"
31#include "saa7134.h"
32
33
34
35static unsigned int ts_debug;
36module_param(ts_debug, int, 0644);
37MODULE_PARM_DESC(ts_debug,"enable debug messages [ts]");
38
39#define dprintk(fmt, arg...) if (ts_debug) \
40 printk(KERN_DEBUG "%s/ts: " fmt, dev->name , ## arg)
41
42
43
44static int buffer_activate(struct saa7134_dev *dev,
45 struct saa7134_buf *buf,
46 struct saa7134_buf *next)
47{
48
49 dprintk("buffer_activate [%p]",buf);
50 buf->vb.state = VIDEOBUF_ACTIVE;
51 buf->top_seen = 0;
52
53 if (NULL == next)
54 next = buf;
55 if (V4L2_FIELD_TOP == buf->vb.field) {
56 dprintk("- [top] buf=%p next=%p\n",buf,next);
57 saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(buf));
58 saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(next));
59 } else {
60 dprintk("- [bottom] buf=%p next=%p\n",buf,next);
61 saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(next));
62 saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(buf));
63 }
64
65
66 saa7134_set_dmabits(dev);
67
68 mod_timer(&dev->ts_q.timeout, jiffies+TS_BUFFER_TIMEOUT);
69
70 if (!dev->ts_started)
71 saa7134_ts_start(dev);
72
73 return 0;
74}
75
76static int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
77 enum v4l2_field field)
78{
79 struct saa7134_dev *dev = q->priv_data;
80 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
81 unsigned int lines, llength, size;
82 int err;
83
84 dprintk("buffer_prepare [%p,%s]\n",buf,v4l2_field_names[field]);
85
86 llength = TS_PACKET_SIZE;
87 lines = dev->ts.nr_packets;
88
89 size = lines * llength;
90 if (0 != buf->vb.baddr && buf->vb.bsize < size)
91 return -EINVAL;
92
93 if (buf->vb.size != size) {
94 saa7134_dma_free(q,buf);
95 }
96
97 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
98
99 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
100
101 dprintk("buffer_prepare: needs_init\n");
102
103 buf->vb.width = llength;
104 buf->vb.height = lines;
105 buf->vb.size = size;
106 buf->pt = &dev->ts.pt_ts;
107
108 err = videobuf_iolock(q,&buf->vb,NULL);
109 if (err)
110 goto oops;
111 err = saa7134_pgtable_build(dev->pci,buf->pt,
112 dma->sglist,
113 dma->sglen,
114 saa7134_buffer_startpage(buf));
115 if (err)
116 goto oops;
117 }
118
119 buf->vb.state = VIDEOBUF_PREPARED;
120 buf->activate = buffer_activate;
121 buf->vb.field = field;
122 return 0;
123
124 oops:
125 saa7134_dma_free(q,buf);
126 return err;
127}
128
129static int
130buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
131{
132 struct saa7134_dev *dev = q->priv_data;
133
134 *size = TS_PACKET_SIZE * dev->ts.nr_packets;
135 if (0 == *count)
136 *count = dev->ts.nr_bufs;
137 *count = saa7134_buffer_count(*size,*count);
138
139 return 0;
140}
141
142static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
143{
144 struct saa7134_dev *dev = q->priv_data;
145 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
146
147 saa7134_buffer_queue(dev,&dev->ts_q,buf);
148}
149
150static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
151{
152 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
153 struct saa7134_dev *dev = q->priv_data;
154
155 if (dev->ts_started)
156 saa7134_ts_stop(dev);
157
158 saa7134_dma_free(q,buf);
159}
160
161struct videobuf_queue_ops saa7134_ts_qops = {
162 .buf_setup = buffer_setup,
163 .buf_prepare = buffer_prepare,
164 .buf_queue = buffer_queue,
165 .buf_release = buffer_release,
166};
167EXPORT_SYMBOL_GPL(saa7134_ts_qops);
168
169
170
171
172static unsigned int tsbufs = 8;
173module_param(tsbufs, int, 0444);
174MODULE_PARM_DESC(tsbufs, "number of ts buffers for read/write IO, range 2-32");
175
176static unsigned int ts_nr_packets = 64;
177module_param(ts_nr_packets, int, 0444);
178MODULE_PARM_DESC(ts_nr_packets,"size of a ts buffers (in ts packets)");
179
180int saa7134_ts_init_hw(struct saa7134_dev *dev)
181{
182
183 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
184
185 saa_writeb(SAA7134_TS_PARALLEL, 0x6c);
186 saa_writeb(SAA7134_TS_PARALLEL_SERIAL, (TS_PACKET_SIZE-1));
187 saa_writeb(SAA7134_TS_DMA0, ((dev->ts.nr_packets-1)&0xff));
188 saa_writeb(SAA7134_TS_DMA1, (((dev->ts.nr_packets-1)>>8)&0xff));
189
190 saa_writeb(SAA7134_TS_DMA2,
191 ((((dev->ts.nr_packets-1)>>16)&0x3f) | 0x00));
192
193 return 0;
194}
195
196int saa7134_ts_init1(struct saa7134_dev *dev)
197{
198
199 if (tsbufs < 2)
200 tsbufs = 2;
201 if (tsbufs > VIDEO_MAX_FRAME)
202 tsbufs = VIDEO_MAX_FRAME;
203 if (ts_nr_packets < 4)
204 ts_nr_packets = 4;
205 if (ts_nr_packets > 312)
206 ts_nr_packets = 312;
207 dev->ts.nr_bufs = tsbufs;
208 dev->ts.nr_packets = ts_nr_packets;
209
210 INIT_LIST_HEAD(&dev->ts_q.queue);
211 init_timer(&dev->ts_q.timeout);
212 dev->ts_q.timeout.function = saa7134_buffer_timeout;
213 dev->ts_q.timeout.data = (unsigned long)(&dev->ts_q);
214 dev->ts_q.dev = dev;
215 dev->ts_q.need_two = 1;
216 dev->ts_started = 0;
217 saa7134_pgtable_alloc(dev->pci,&dev->ts.pt_ts);
218
219
220 saa7134_ts_init_hw(dev);
221
222 return 0;
223}
224
225
226int saa7134_ts_stop(struct saa7134_dev *dev)
227{
228 dprintk("TS stop\n");
229
230 BUG_ON(!dev->ts_started);
231
232
233 switch (saa7134_boards[dev->board].ts_type) {
234 case SAA7134_MPEG_TS_PARALLEL:
235 saa_writeb(SAA7134_TS_PARALLEL, 0x6c);
236 dev->ts_started = 0;
237 break;
238 case SAA7134_MPEG_TS_SERIAL:
239 saa_writeb(SAA7134_TS_SERIAL0, 0x40);
240 dev->ts_started = 0;
241 break;
242 }
243 return 0;
244}
245
246
247int saa7134_ts_start(struct saa7134_dev *dev)
248{
249 dprintk("TS start\n");
250
251 BUG_ON(dev->ts_started);
252
253 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
254 saa_writeb(SAA7134_TS_SERIAL1, 0x03);
255 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
256 saa_writeb(SAA7134_TS_SERIAL1, 0x01);
257
258
259 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
260
261
262 switch (saa7134_boards[dev->board].ts_type) {
263 case SAA7134_MPEG_TS_PARALLEL:
264 saa_writeb(SAA7134_TS_SERIAL0, 0x40);
265 saa_writeb(SAA7134_TS_PARALLEL, 0xec |
266 (saa7134_boards[dev->board].ts_force_val << 4));
267 break;
268 case SAA7134_MPEG_TS_SERIAL:
269 saa_writeb(SAA7134_TS_SERIAL0, 0xd8);
270 saa_writeb(SAA7134_TS_PARALLEL, 0x6c |
271 (saa7134_boards[dev->board].ts_force_val << 4));
272 saa_writeb(SAA7134_TS_PARALLEL_SERIAL, 0xbc);
273 saa_writeb(SAA7134_TS_SERIAL1, 0x02);
274 break;
275 }
276
277 dev->ts_started = 1;
278
279 return 0;
280}
281
282int saa7134_ts_fini(struct saa7134_dev *dev)
283{
284 saa7134_pgtable_free(dev->pci,&dev->ts.pt_ts);
285 return 0;
286}
287
288void saa7134_irq_ts_done(struct saa7134_dev *dev, unsigned long status)
289{
290 enum v4l2_field field;
291
292 spin_lock(&dev->slock);
293 if (dev->ts_q.curr) {
294 field = dev->ts_q.curr->vb.field;
295 if (field == V4L2_FIELD_TOP) {
296 if ((status & 0x100000) != 0x000000)
297 goto done;
298 } else {
299 if ((status & 0x100000) != 0x100000)
300 goto done;
301 }
302 saa7134_buffer_finish(dev,&dev->ts_q,VIDEOBUF_DONE);
303 }
304 saa7134_buffer_next(dev,&dev->ts_q);
305
306 done:
307 spin_unlock(&dev->slock);
308}
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