1 /*
2 *
3 * device driver for philips saa7134 based TV cards
4 * video4linux video interface
5 *
6 * (c) 2001,02 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */
22
23 #include <linux/init.h>
24 #include <linux/list.h>
25 #include <linux/module.h>
26 #include <linux/kernel.h>
27 #include <linux/delay.h>
28
29 #include "saa7134-reg.h"
30 #include "saa7134.h"
31
32 /* ------------------------------------------------------------------ */
33
34 static unsigned int ts_debug;
35 module_param(ts_debug, int, 0644);
36 MODULE_PARM_DESC(ts_debug,"enable debug messages [ts]");
37
38 #define dprintk(fmt, arg...) if (ts_debug) \
39 printk(KERN_DEBUG "%s/ts: " fmt, dev->name , ## arg)
40
41 /* ------------------------------------------------------------------ */
42
buffer_activate(struct saa7134_dev * dev,struct saa7134_buf * buf,struct saa7134_buf * next)43 static int buffer_activate(struct saa7134_dev *dev,
44 struct saa7134_buf *buf,
45 struct saa7134_buf *next)
46 {
47
48 dprintk("buffer_activate [%p]",buf);
49 buf->vb.state = VIDEOBUF_ACTIVE;
50 buf->top_seen = 0;
51
52 if (NULL == next)
53 next = buf;
54 if (V4L2_FIELD_TOP == buf->vb.field) {
55 dprintk("- [top] buf=%p next=%p\n",buf,next);
56 saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(buf));
57 saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(next));
58 } else {
59 dprintk("- [bottom] buf=%p next=%p\n",buf,next);
60 saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(next));
61 saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(buf));
62 }
63
64 /* start DMA */
65 saa7134_set_dmabits(dev);
66
67 mod_timer(&dev->ts_q.timeout, jiffies+TS_BUFFER_TIMEOUT);
68
69 if (!dev->ts_started)
70 saa7134_ts_start(dev);
71
72 return 0;
73 }
74
buffer_prepare(struct videobuf_queue * q,struct videobuf_buffer * vb,enum v4l2_field field)75 static int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
76 enum v4l2_field field)
77 {
78 struct saa7134_dev *dev = q->priv_data;
79 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
80 unsigned int lines, llength, size;
81 int err;
82
83 dprintk("buffer_prepare [%p,%s]\n",buf,v4l2_field_names[field]);
84
85 llength = TS_PACKET_SIZE;
86 lines = dev->ts.nr_packets;
87
88 size = lines * llength;
89 if (0 != buf->vb.baddr && buf->vb.bsize < size)
90 return -EINVAL;
91
92 if (buf->vb.size != size) {
93 saa7134_dma_free(q,buf);
94 }
95
96 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
97
98 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
99
100 dprintk("buffer_prepare: needs_init\n");
101
102 buf->vb.width = llength;
103 buf->vb.height = lines;
104 buf->vb.size = size;
105 buf->pt = &dev->ts.pt_ts;
106
107 err = videobuf_iolock(q,&buf->vb,NULL);
108 if (err)
109 goto oops;
110 err = saa7134_pgtable_build(dev->pci,buf->pt,
111 dma->sglist,
112 dma->sglen,
113 saa7134_buffer_startpage(buf));
114 if (err)
115 goto oops;
116 }
117
118 buf->vb.state = VIDEOBUF_PREPARED;
119 buf->activate = buffer_activate;
120 buf->vb.field = field;
121 return 0;
122
123 oops:
124 saa7134_dma_free(q,buf);
125 return err;
126 }
127
128 static int
buffer_setup(struct videobuf_queue * q,unsigned int * count,unsigned int * size)129 buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
130 {
131 struct saa7134_dev *dev = q->priv_data;
132
133 *size = TS_PACKET_SIZE * dev->ts.nr_packets;
134 if (0 == *count)
135 *count = dev->ts.nr_bufs;
136 *count = saa7134_buffer_count(*size,*count);
137
138 return 0;
139 }
140
buffer_queue(struct videobuf_queue * q,struct videobuf_buffer * vb)141 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
142 {
143 struct saa7134_dev *dev = q->priv_data;
144 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
145
146 saa7134_buffer_queue(dev,&dev->ts_q,buf);
147 }
148
buffer_release(struct videobuf_queue * q,struct videobuf_buffer * vb)149 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
150 {
151 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
152 struct saa7134_dev *dev = q->priv_data;
153
154 if (dev->ts_started)
155 saa7134_ts_stop(dev);
156
157 saa7134_dma_free(q,buf);
158 }
159
160 struct videobuf_queue_ops saa7134_ts_qops = {
161 .buf_setup = buffer_setup,
162 .buf_prepare = buffer_prepare,
163 .buf_queue = buffer_queue,
164 .buf_release = buffer_release,
165 };
166 EXPORT_SYMBOL_GPL(saa7134_ts_qops);
167
168 /* ----------------------------------------------------------- */
169 /* exported stuff */
170
171 static unsigned int tsbufs = 8;
172 module_param(tsbufs, int, 0444);
173 MODULE_PARM_DESC(tsbufs, "number of ts buffers for read/write IO, range 2-32");
174
175 static unsigned int ts_nr_packets = 64;
176 module_param(ts_nr_packets, int, 0444);
177 MODULE_PARM_DESC(ts_nr_packets,"size of a ts buffers (in ts packets)");
178
saa7134_ts_init_hw(struct saa7134_dev * dev)179 int saa7134_ts_init_hw(struct saa7134_dev *dev)
180 {
181 /* deactivate TS softreset */
182 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
183 /* TSSOP high active, TSVAL high active, TSLOCK ignored */
184 saa_writeb(SAA7134_TS_PARALLEL, 0x6c);
185 saa_writeb(SAA7134_TS_PARALLEL_SERIAL, (TS_PACKET_SIZE-1));
186 saa_writeb(SAA7134_TS_DMA0, ((dev->ts.nr_packets-1)&0xff));
187 saa_writeb(SAA7134_TS_DMA1, (((dev->ts.nr_packets-1)>>8)&0xff));
188 /* TSNOPIT=0, TSCOLAP=0 */
189 saa_writeb(SAA7134_TS_DMA2,
190 ((((dev->ts.nr_packets-1)>>16)&0x3f) | 0x00));
191
192 return 0;
193 }
194
saa7134_ts_init1(struct saa7134_dev * dev)195 int saa7134_ts_init1(struct saa7134_dev *dev)
196 {
197 /* sanitycheck insmod options */
198 if (tsbufs < 2)
199 tsbufs = 2;
200 if (tsbufs > VIDEO_MAX_FRAME)
201 tsbufs = VIDEO_MAX_FRAME;
202 if (ts_nr_packets < 4)
203 ts_nr_packets = 4;
204 if (ts_nr_packets > 312)
205 ts_nr_packets = 312;
206 dev->ts.nr_bufs = tsbufs;
207 dev->ts.nr_packets = ts_nr_packets;
208
209 INIT_LIST_HEAD(&dev->ts_q.queue);
210 init_timer(&dev->ts_q.timeout);
211 dev->ts_q.timeout.function = saa7134_buffer_timeout;
212 dev->ts_q.timeout.data = (unsigned long)(&dev->ts_q);
213 dev->ts_q.dev = dev;
214 dev->ts_q.need_two = 1;
215 dev->ts_started = 0;
216 saa7134_pgtable_alloc(dev->pci,&dev->ts.pt_ts);
217
218 /* init TS hw */
219 saa7134_ts_init_hw(dev);
220
221 return 0;
222 }
223
224 /* Function for stop TS */
saa7134_ts_stop(struct saa7134_dev * dev)225 int saa7134_ts_stop(struct saa7134_dev *dev)
226 {
227 dprintk("TS stop\n");
228
229 BUG_ON(!dev->ts_started);
230
231 /* Stop TS stream */
232 switch (saa7134_boards[dev->board].ts_type) {
233 case SAA7134_MPEG_TS_PARALLEL:
234 saa_writeb(SAA7134_TS_PARALLEL, 0x6c);
235 dev->ts_started = 0;
236 break;
237 case SAA7134_MPEG_TS_SERIAL:
238 saa_writeb(SAA7134_TS_SERIAL0, 0x40);
239 dev->ts_started = 0;
240 break;
241 }
242 return 0;
243 }
244
245 /* Function for start TS */
saa7134_ts_start(struct saa7134_dev * dev)246 int saa7134_ts_start(struct saa7134_dev *dev)
247 {
248 dprintk("TS start\n");
249
250 BUG_ON(dev->ts_started);
251
252 /* dma: setup channel 5 (= TS) */
253 saa_writeb(SAA7134_TS_DMA0, (dev->ts.nr_packets - 1) & 0xff);
254 saa_writeb(SAA7134_TS_DMA1,
255 ((dev->ts.nr_packets - 1) >> 8) & 0xff);
256 /* TSNOPIT=0, TSCOLAP=0 */
257 saa_writeb(SAA7134_TS_DMA2,
258 (((dev->ts.nr_packets - 1) >> 16) & 0x3f) | 0x00);
259 saa_writel(SAA7134_RS_PITCH(5), TS_PACKET_SIZE);
260 saa_writel(SAA7134_RS_CONTROL(5), SAA7134_RS_CONTROL_BURST_16 |
261 SAA7134_RS_CONTROL_ME |
262 (dev->ts.pt_ts.dma >> 12));
263
264 /* reset hardware TS buffers */
265 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
266 saa_writeb(SAA7134_TS_SERIAL1, 0x03);
267 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
268 saa_writeb(SAA7134_TS_SERIAL1, 0x01);
269
270 /* TS clock non-inverted */
271 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
272
273 /* Start TS stream */
274 switch (saa7134_boards[dev->board].ts_type) {
275 case SAA7134_MPEG_TS_PARALLEL:
276 saa_writeb(SAA7134_TS_SERIAL0, 0x40);
277 saa_writeb(SAA7134_TS_PARALLEL, 0xec |
278 (saa7134_boards[dev->board].ts_force_val << 4));
279 break;
280 case SAA7134_MPEG_TS_SERIAL:
281 saa_writeb(SAA7134_TS_SERIAL0, 0xd8);
282 saa_writeb(SAA7134_TS_PARALLEL, 0x6c |
283 (saa7134_boards[dev->board].ts_force_val << 4));
284 saa_writeb(SAA7134_TS_PARALLEL_SERIAL, 0xbc);
285 saa_writeb(SAA7134_TS_SERIAL1, 0x02);
286 break;
287 }
288
289 dev->ts_started = 1;
290
291 return 0;
292 }
293
saa7134_ts_fini(struct saa7134_dev * dev)294 int saa7134_ts_fini(struct saa7134_dev *dev)
295 {
296 saa7134_pgtable_free(dev->pci,&dev->ts.pt_ts);
297 return 0;
298 }
299
saa7134_irq_ts_done(struct saa7134_dev * dev,unsigned long status)300 void saa7134_irq_ts_done(struct saa7134_dev *dev, unsigned long status)
301 {
302 enum v4l2_field field;
303
304 spin_lock(&dev->slock);
305 if (dev->ts_q.curr) {
306 field = dev->ts_q.curr->vb.field;
307 if (field == V4L2_FIELD_TOP) {
308 if ((status & 0x100000) != 0x000000)
309 goto done;
310 } else {
311 if ((status & 0x100000) != 0x100000)
312 goto done;
313 }
314 saa7134_buffer_finish(dev,&dev->ts_q,VIDEOBUF_DONE);
315 }
316 saa7134_buffer_next(dev,&dev->ts_q);
317
318 done:
319 spin_unlock(&dev->slock);
320 }
321
322 /* ----------------------------------------------------------- */
323 /*
324 * Local variables:
325 * c-basic-offset: 8
326 * End:
327 */
328