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10#include "saa7134.h"
11#include "saa7134-reg.h"
12
13#include <linux/init.h>
14#include <linux/list.h>
15#include <linux/module.h>
16#include <linux/kernel.h>
17#include <linux/delay.h>
18
19
20
21static unsigned int ts_debug;
22module_param(ts_debug, int, 0644);
23MODULE_PARM_DESC(ts_debug,"enable debug messages [ts]");
24
25#define ts_dbg(fmt, arg...) do { \
26 if (ts_debug) \
27 printk(KERN_DEBUG pr_fmt("ts: " fmt), ## arg); \
28 } while (0)
29
30
31static int buffer_activate(struct saa7134_dev *dev,
32 struct saa7134_buf *buf,
33 struct saa7134_buf *next)
34{
35
36 ts_dbg("buffer_activate [%p]", buf);
37 buf->top_seen = 0;
38
39 if (!dev->ts_started)
40 dev->ts_field = V4L2_FIELD_TOP;
41
42 if (NULL == next)
43 next = buf;
44 if (V4L2_FIELD_TOP == dev->ts_field) {
45 ts_dbg("- [top] buf=%p next=%p\n", buf, next);
46 saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(buf));
47 saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(next));
48 dev->ts_field = V4L2_FIELD_BOTTOM;
49 } else {
50 ts_dbg("- [bottom] buf=%p next=%p\n", buf, next);
51 saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(next));
52 saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(buf));
53 dev->ts_field = V4L2_FIELD_TOP;
54 }
55
56
57 saa7134_set_dmabits(dev);
58
59 mod_timer(&dev->ts_q.timeout, jiffies+TS_BUFFER_TIMEOUT);
60
61 if (!dev->ts_started)
62 saa7134_ts_start(dev);
63
64 return 0;
65}
66
67int saa7134_ts_buffer_init(struct vb2_buffer *vb2)
68{
69 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb2);
70 struct saa7134_dmaqueue *dmaq = vb2->vb2_queue->drv_priv;
71 struct saa7134_buf *buf = container_of(vbuf, struct saa7134_buf, vb2);
72
73 dmaq->curr = NULL;
74 buf->activate = buffer_activate;
75
76 return 0;
77}
78EXPORT_SYMBOL_GPL(saa7134_ts_buffer_init);
79
80int saa7134_ts_buffer_prepare(struct vb2_buffer *vb2)
81{
82 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb2);
83 struct saa7134_dmaqueue *dmaq = vb2->vb2_queue->drv_priv;
84 struct saa7134_dev *dev = dmaq->dev;
85 struct saa7134_buf *buf = container_of(vbuf, struct saa7134_buf, vb2);
86 struct sg_table *dma = vb2_dma_sg_plane_desc(vb2, 0);
87 unsigned int lines, llength, size;
88
89 ts_dbg("buffer_prepare [%p]\n", buf);
90
91 llength = TS_PACKET_SIZE;
92 lines = dev->ts.nr_packets;
93
94 size = lines * llength;
95 if (vb2_plane_size(vb2, 0) < size)
96 return -EINVAL;
97
98 vb2_set_plane_payload(vb2, 0, size);
99 vbuf->field = dev->field;
100
101 return saa7134_pgtable_build(dev->pci, &dmaq->pt, dma->sgl, dma->nents,
102 saa7134_buffer_startpage(buf));
103}
104EXPORT_SYMBOL_GPL(saa7134_ts_buffer_prepare);
105
106int saa7134_ts_queue_setup(struct vb2_queue *q,
107 unsigned int *nbuffers, unsigned int *nplanes,
108 unsigned int sizes[], struct device *alloc_devs[])
109{
110 struct saa7134_dmaqueue *dmaq = q->drv_priv;
111 struct saa7134_dev *dev = dmaq->dev;
112 int size = TS_PACKET_SIZE * dev->ts.nr_packets;
113
114 if (0 == *nbuffers)
115 *nbuffers = dev->ts.nr_bufs;
116 *nbuffers = saa7134_buffer_count(size, *nbuffers);
117 if (*nbuffers < 3)
118 *nbuffers = 3;
119 *nplanes = 1;
120 sizes[0] = size;
121 return 0;
122}
123EXPORT_SYMBOL_GPL(saa7134_ts_queue_setup);
124
125int saa7134_ts_start_streaming(struct vb2_queue *vq, unsigned int count)
126{
127 struct saa7134_dmaqueue *dmaq = vq->drv_priv;
128 struct saa7134_dev *dev = dmaq->dev;
129
130
131
132
133
134 if (vb2_is_busy(&dev->video_vbq) && dev->fmt->planar) {
135 struct saa7134_buf *buf, *tmp;
136
137 list_for_each_entry_safe(buf, tmp, &dmaq->queue, entry) {
138 list_del(&buf->entry);
139 vb2_buffer_done(&buf->vb2.vb2_buf,
140 VB2_BUF_STATE_QUEUED);
141 }
142 if (dmaq->curr) {
143 vb2_buffer_done(&dmaq->curr->vb2.vb2_buf,
144 VB2_BUF_STATE_QUEUED);
145 dmaq->curr = NULL;
146 }
147 return -EBUSY;
148 }
149 dmaq->seq_nr = 0;
150 return 0;
151}
152EXPORT_SYMBOL_GPL(saa7134_ts_start_streaming);
153
154void saa7134_ts_stop_streaming(struct vb2_queue *vq)
155{
156 struct saa7134_dmaqueue *dmaq = vq->drv_priv;
157 struct saa7134_dev *dev = dmaq->dev;
158
159 saa7134_ts_stop(dev);
160 saa7134_stop_streaming(dev, dmaq);
161}
162EXPORT_SYMBOL_GPL(saa7134_ts_stop_streaming);
163
164struct vb2_ops saa7134_ts_qops = {
165 .queue_setup = saa7134_ts_queue_setup,
166 .buf_init = saa7134_ts_buffer_init,
167 .buf_prepare = saa7134_ts_buffer_prepare,
168 .buf_queue = saa7134_vb2_buffer_queue,
169 .wait_prepare = vb2_ops_wait_prepare,
170 .wait_finish = vb2_ops_wait_finish,
171 .stop_streaming = saa7134_ts_stop_streaming,
172};
173EXPORT_SYMBOL_GPL(saa7134_ts_qops);
174
175
176
177
178static unsigned int tsbufs = 8;
179module_param(tsbufs, int, 0444);
180MODULE_PARM_DESC(tsbufs, "number of ts buffers for read/write IO, range 2-32");
181
182static unsigned int ts_nr_packets = 64;
183module_param(ts_nr_packets, int, 0444);
184MODULE_PARM_DESC(ts_nr_packets,"size of a ts buffers (in ts packets)");
185
186int saa7134_ts_init_hw(struct saa7134_dev *dev)
187{
188
189 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
190
191 saa_writeb(SAA7134_TS_PARALLEL, 0x6c);
192 saa_writeb(SAA7134_TS_PARALLEL_SERIAL, (TS_PACKET_SIZE-1));
193 saa_writeb(SAA7134_TS_DMA0, ((dev->ts.nr_packets-1)&0xff));
194 saa_writeb(SAA7134_TS_DMA1, (((dev->ts.nr_packets-1)>>8)&0xff));
195
196 saa_writeb(SAA7134_TS_DMA2,
197 ((((dev->ts.nr_packets-1)>>16)&0x3f) | 0x00));
198
199 return 0;
200}
201
202int saa7134_ts_init1(struct saa7134_dev *dev)
203{
204
205 if (tsbufs < 2)
206 tsbufs = 2;
207 if (tsbufs > VIDEO_MAX_FRAME)
208 tsbufs = VIDEO_MAX_FRAME;
209 if (ts_nr_packets < 4)
210 ts_nr_packets = 4;
211 if (ts_nr_packets > 312)
212 ts_nr_packets = 312;
213 dev->ts.nr_bufs = tsbufs;
214 dev->ts.nr_packets = ts_nr_packets;
215
216 INIT_LIST_HEAD(&dev->ts_q.queue);
217 timer_setup(&dev->ts_q.timeout, saa7134_buffer_timeout, 0);
218 dev->ts_q.dev = dev;
219 dev->ts_q.need_two = 1;
220 dev->ts_started = 0;
221 saa7134_pgtable_alloc(dev->pci, &dev->ts_q.pt);
222
223
224 saa7134_ts_init_hw(dev);
225
226 return 0;
227}
228
229
230int saa7134_ts_stop(struct saa7134_dev *dev)
231{
232 ts_dbg("TS stop\n");
233
234 if (!dev->ts_started)
235 return 0;
236
237
238 switch (saa7134_boards[dev->board].ts_type) {
239 case SAA7134_MPEG_TS_PARALLEL:
240 saa_writeb(SAA7134_TS_PARALLEL, 0x6c);
241 dev->ts_started = 0;
242 break;
243 case SAA7134_MPEG_TS_SERIAL:
244 saa_writeb(SAA7134_TS_SERIAL0, 0x40);
245 dev->ts_started = 0;
246 break;
247 }
248 return 0;
249}
250
251
252int saa7134_ts_start(struct saa7134_dev *dev)
253{
254 ts_dbg("TS start\n");
255
256 if (WARN_ON(dev->ts_started))
257 return 0;
258
259
260 saa_writeb(SAA7134_TS_DMA0, (dev->ts.nr_packets - 1) & 0xff);
261 saa_writeb(SAA7134_TS_DMA1,
262 ((dev->ts.nr_packets - 1) >> 8) & 0xff);
263
264 saa_writeb(SAA7134_TS_DMA2,
265 (((dev->ts.nr_packets - 1) >> 16) & 0x3f) | 0x00);
266 saa_writel(SAA7134_RS_PITCH(5), TS_PACKET_SIZE);
267 saa_writel(SAA7134_RS_CONTROL(5), SAA7134_RS_CONTROL_BURST_16 |
268 SAA7134_RS_CONTROL_ME |
269 (dev->ts_q.pt.dma >> 12));
270
271
272 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
273 saa_writeb(SAA7134_TS_SERIAL1, 0x03);
274 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
275 saa_writeb(SAA7134_TS_SERIAL1, 0x01);
276
277
278 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
279
280
281 switch (saa7134_boards[dev->board].ts_type) {
282 case SAA7134_MPEG_TS_PARALLEL:
283 saa_writeb(SAA7134_TS_SERIAL0, 0x40);
284 saa_writeb(SAA7134_TS_PARALLEL, 0xec |
285 (saa7134_boards[dev->board].ts_force_val << 4));
286 break;
287 case SAA7134_MPEG_TS_SERIAL:
288 saa_writeb(SAA7134_TS_SERIAL0, 0xd8);
289 saa_writeb(SAA7134_TS_PARALLEL, 0x6c |
290 (saa7134_boards[dev->board].ts_force_val << 4));
291 saa_writeb(SAA7134_TS_PARALLEL_SERIAL, 0xbc);
292 saa_writeb(SAA7134_TS_SERIAL1, 0x02);
293 break;
294 }
295
296 dev->ts_started = 1;
297
298 return 0;
299}
300
301int saa7134_ts_fini(struct saa7134_dev *dev)
302{
303 saa7134_pgtable_free(dev->pci, &dev->ts_q.pt);
304 return 0;
305}
306
307void saa7134_irq_ts_done(struct saa7134_dev *dev, unsigned long status)
308{
309 enum v4l2_field field;
310
311 spin_lock(&dev->slock);
312 if (dev->ts_q.curr) {
313 field = dev->ts_field;
314 if (field != V4L2_FIELD_TOP) {
315 if ((status & 0x100000) != 0x000000)
316 goto done;
317 } else {
318 if ((status & 0x100000) != 0x100000)
319 goto done;
320 }
321 saa7134_buffer_finish(dev, &dev->ts_q, VB2_BUF_STATE_DONE);
322 }
323 saa7134_buffer_next(dev,&dev->ts_q);
324
325 done:
326 spin_unlock(&dev->slock);
327}
328
