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/slab.h>
28 #include <linux/delay.h>
29
30 #include "saa7134-reg.h"
31 #include "saa7134.h"
32
33 /* ------------------------------------------------------------------ */
34
35 static unsigned int ts_debug;
36 module_param(ts_debug, int, 0644);
37 MODULE_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
buffer_activate(struct saa7134_dev * dev,struct saa7134_buf * buf,struct saa7134_buf * next)44 static 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 /* start DMA */
66 saa7134_set_dmabits(dev);
67
68 mod_timer(&dev->ts_q.timeout, jiffies+BUFFER_TIMEOUT);
69
70 if (dev->ts_state == SAA7134_TS_BUFF_DONE) {
71 /* Clear TS cache */
72 dev->buff_cnt = 0;
73 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
74 saa_writeb(SAA7134_TS_SERIAL1, 0x03);
75 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
76 saa_writeb(SAA7134_TS_SERIAL1, 0x01);
77
78 /* TS clock non-inverted */
79 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
80
81 /* Start TS stream */
82 saa_writeb(SAA7134_TS_SERIAL0, 0x40);
83 saa_writeb(SAA7134_TS_PARALLEL, 0xEC);
84 dev->ts_state = SAA7134_TS_STARTED;
85 }
86
87 return 0;
88 }
89
buffer_prepare(struct videobuf_queue * q,struct videobuf_buffer * vb,enum v4l2_field field)90 static int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
91 enum v4l2_field field)
92 {
93 struct saa7134_dev *dev = q->priv_data;
94 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
95 unsigned int lines, llength, size;
96 u32 control;
97 int err;
98
99 dprintk("buffer_prepare [%p,%s]\n",buf,v4l2_field_names[field]);
100
101 llength = TS_PACKET_SIZE;
102 lines = dev->ts.nr_packets;
103
104 size = lines * llength;
105 if (0 != buf->vb.baddr && buf->vb.bsize < size)
106 return -EINVAL;
107
108 if (buf->vb.size != size) {
109 saa7134_dma_free(q,buf);
110 }
111
112 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
113 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
114
115 buf->vb.width = llength;
116 buf->vb.height = lines;
117 buf->vb.size = size;
118 buf->pt = &dev->ts.pt_ts;
119
120 err = videobuf_iolock(q,&buf->vb,NULL);
121 if (err)
122 goto oops;
123 err = saa7134_pgtable_build(dev->pci,buf->pt,
124 dma->sglist,
125 dma->sglen,
126 saa7134_buffer_startpage(buf));
127 if (err)
128 goto oops;
129 }
130
131 dev->buff_cnt++;
132
133 if (dev->buff_cnt == dev->ts.nr_bufs) {
134 dev->ts_state = SAA7134_TS_BUFF_DONE;
135 /* dma: setup channel 5 (= TS) */
136 control = SAA7134_RS_CONTROL_BURST_16 |
137 SAA7134_RS_CONTROL_ME |
138 (buf->pt->dma >> 12);
139
140 saa_writeb(SAA7134_TS_DMA0, (lines - 1) & 0xff);
141 saa_writeb(SAA7134_TS_DMA1, ((lines - 1) >> 8) & 0xff);
142 /* TSNOPIT=0, TSCOLAP=0 */
143 saa_writeb(SAA7134_TS_DMA2, (((lines - 1) >> 16) & 0x3f) | 0x00);
144 saa_writel(SAA7134_RS_PITCH(5), TS_PACKET_SIZE);
145 saa_writel(SAA7134_RS_CONTROL(5), control);
146 }
147
148 buf->vb.state = VIDEOBUF_PREPARED;
149 buf->activate = buffer_activate;
150 buf->vb.field = field;
151 return 0;
152
153 oops:
154 saa7134_dma_free(q,buf);
155 return err;
156 }
157
158 static int
buffer_setup(struct videobuf_queue * q,unsigned int * count,unsigned int * size)159 buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
160 {
161 struct saa7134_dev *dev = q->priv_data;
162
163 *size = TS_PACKET_SIZE * dev->ts.nr_packets;
164 if (0 == *count)
165 *count = dev->ts.nr_bufs;
166 *count = saa7134_buffer_count(*size,*count);
167 dev->buff_cnt = 0;
168 dev->ts_state = SAA7134_TS_STOPPED;
169 return 0;
170 }
171
buffer_queue(struct videobuf_queue * q,struct videobuf_buffer * vb)172 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
173 {
174 struct saa7134_dev *dev = q->priv_data;
175 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
176
177 saa7134_buffer_queue(dev,&dev->ts_q,buf);
178 }
179
buffer_release(struct videobuf_queue * q,struct videobuf_buffer * vb)180 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
181 {
182 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
183 struct saa7134_dev *dev = q->priv_data;
184
185 if (dev->ts_state == SAA7134_TS_STARTED) {
186 /* Stop TS transport */
187 saa_writeb(SAA7134_TS_PARALLEL, 0x6c);
188 dev->ts_state = SAA7134_TS_STOPPED;
189 }
190 saa7134_dma_free(q,buf);
191 }
192
193 struct videobuf_queue_ops saa7134_ts_qops = {
194 .buf_setup = buffer_setup,
195 .buf_prepare = buffer_prepare,
196 .buf_queue = buffer_queue,
197 .buf_release = buffer_release,
198 };
199 EXPORT_SYMBOL_GPL(saa7134_ts_qops);
200
201 /* ----------------------------------------------------------- */
202 /* exported stuff */
203
204 static unsigned int tsbufs = 8;
205 module_param(tsbufs, int, 0444);
206 MODULE_PARM_DESC(tsbufs,"number of ts buffers, range 2-32");
207
208 static unsigned int ts_nr_packets = 64;
209 module_param(ts_nr_packets, int, 0444);
210 MODULE_PARM_DESC(ts_nr_packets,"size of a ts buffers (in ts packets)");
211
saa7134_ts_init_hw(struct saa7134_dev * dev)212 int saa7134_ts_init_hw(struct saa7134_dev *dev)
213 {
214 /* deactivate TS softreset */
215 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
216 /* TSSOP high active, TSVAL high active, TSLOCK ignored */
217 saa_writeb(SAA7134_TS_PARALLEL, 0x6c);
218 saa_writeb(SAA7134_TS_PARALLEL_SERIAL, (TS_PACKET_SIZE-1));
219 saa_writeb(SAA7134_TS_DMA0, ((dev->ts.nr_packets-1)&0xff));
220 saa_writeb(SAA7134_TS_DMA1, (((dev->ts.nr_packets-1)>>8)&0xff));
221 /* TSNOPIT=0, TSCOLAP=0 */
222 saa_writeb(SAA7134_TS_DMA2,
223 ((((dev->ts.nr_packets-1)>>16)&0x3f) | 0x00));
224
225 return 0;
226 }
227
saa7134_ts_init1(struct saa7134_dev * dev)228 int saa7134_ts_init1(struct saa7134_dev *dev)
229 {
230 /* sanitycheck insmod options */
231 if (tsbufs < 2)
232 tsbufs = 2;
233 if (tsbufs > VIDEO_MAX_FRAME)
234 tsbufs = VIDEO_MAX_FRAME;
235 if (ts_nr_packets < 4)
236 ts_nr_packets = 4;
237 if (ts_nr_packets > 312)
238 ts_nr_packets = 312;
239 dev->ts.nr_bufs = tsbufs;
240 dev->ts.nr_packets = ts_nr_packets;
241
242 INIT_LIST_HEAD(&dev->ts_q.queue);
243 init_timer(&dev->ts_q.timeout);
244 dev->ts_q.timeout.function = saa7134_buffer_timeout;
245 dev->ts_q.timeout.data = (unsigned long)(&dev->ts_q);
246 dev->ts_q.dev = dev;
247 dev->ts_q.need_two = 1;
248 saa7134_pgtable_alloc(dev->pci,&dev->ts.pt_ts);
249
250 /* init TS hw */
251 saa7134_ts_init_hw(dev);
252
253 return 0;
254 }
255
saa7134_ts_fini(struct saa7134_dev * dev)256 int saa7134_ts_fini(struct saa7134_dev *dev)
257 {
258 saa7134_pgtable_free(dev->pci,&dev->ts.pt_ts);
259 return 0;
260 }
261
262
saa7134_irq_ts_done(struct saa7134_dev * dev,unsigned long status)263 void saa7134_irq_ts_done(struct saa7134_dev *dev, unsigned long status)
264 {
265 enum v4l2_field field;
266
267 spin_lock(&dev->slock);
268 if (dev->ts_q.curr) {
269 field = dev->ts_q.curr->vb.field;
270 if (field == V4L2_FIELD_TOP) {
271 if ((status & 0x100000) != 0x000000)
272 goto done;
273 } else {
274 if ((status & 0x100000) != 0x100000)
275 goto done;
276 }
277 saa7134_buffer_finish(dev,&dev->ts_q,VIDEOBUF_DONE);
278 }
279 saa7134_buffer_next(dev,&dev->ts_q);
280
281 done:
282 spin_unlock(&dev->slock);
283 }
284
285 /* ----------------------------------------------------------- */
286 /*
287 * Local variables:
288 * c-basic-offset: 8
289 * End:
290 */
291