3 * device driver for philips saa7134 based TV cards
4 * video4linux video interface
6 * (c) 2001,02 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
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.
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.
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.
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>
30 #include "saa7134-reg.h"
33 /* ------------------------------------------------------------------ */
35 static unsigned int ts_debug;
36 module_param(ts_debug, int, 0644);
37 MODULE_PARM_DESC(ts_debug,"enable debug messages [ts]");
39 #define dprintk(fmt, arg...) if (ts_debug) \
40 printk(KERN_DEBUG "%s/ts: " fmt, dev->name , ## arg)
42 /* ------------------------------------------------------------------ */
44 static int buffer_activate(struct saa7134_dev *dev,
45 struct saa7134_buf *buf,
46 struct saa7134_buf *next)
49 dprintk("buffer_activate [%p]",buf);
50 buf->vb.state = VIDEOBUF_ACTIVE;
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));
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));
66 saa7134_set_dmabits(dev);
68 mod_timer(&dev->ts_q.timeout, jiffies+BUFFER_TIMEOUT);
70 if (dev->ts_state == SAA7134_TS_BUFF_DONE) {
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);
78 /* TS clock non-inverted */
79 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
82 switch (saa7134_boards[dev->board].ts_type) {
83 case SAA7134_MPEG_TS_PARALLEL:
84 saa_writeb(SAA7134_TS_SERIAL0, 0x40);
85 saa_writeb(SAA7134_TS_PARALLEL, 0xec);
87 case SAA7134_MPEG_TS_SERIAL:
88 saa_writeb(SAA7134_TS_SERIAL0, 0xd8);
89 saa_writeb(SAA7134_TS_PARALLEL, 0x6c);
90 saa_writeb(SAA7134_TS_PARALLEL_SERIAL, 0xbc);
91 saa_writeb(SAA7134_TS_SERIAL1, 0x02);
95 dev->ts_state = SAA7134_TS_STARTED;
101 static int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
102 enum v4l2_field field)
104 struct saa7134_dev *dev = q->priv_data;
105 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
106 unsigned int lines, llength, size;
110 dprintk("buffer_prepare [%p,%s]\n",buf,v4l2_field_names[field]);
112 llength = TS_PACKET_SIZE;
113 lines = dev->ts.nr_packets;
115 size = lines * llength;
116 if (0 != buf->vb.baddr && buf->vb.bsize < size)
119 if (buf->vb.size != size) {
120 saa7134_dma_free(q,buf);
123 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
124 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
126 buf->vb.width = llength;
127 buf->vb.height = lines;
129 buf->pt = &dev->ts.pt_ts;
131 err = videobuf_iolock(q,&buf->vb,NULL);
134 err = saa7134_pgtable_build(dev->pci,buf->pt,
137 saa7134_buffer_startpage(buf));
144 if (dev->buff_cnt == dev->ts.nr_bufs) {
145 dev->ts_state = SAA7134_TS_BUFF_DONE;
146 /* dma: setup channel 5 (= TS) */
147 control = SAA7134_RS_CONTROL_BURST_16 |
148 SAA7134_RS_CONTROL_ME |
149 (buf->pt->dma >> 12);
151 saa_writeb(SAA7134_TS_DMA0, (lines - 1) & 0xff);
152 saa_writeb(SAA7134_TS_DMA1, ((lines - 1) >> 8) & 0xff);
153 /* TSNOPIT=0, TSCOLAP=0 */
154 saa_writeb(SAA7134_TS_DMA2, (((lines - 1) >> 16) & 0x3f) | 0x00);
155 saa_writel(SAA7134_RS_PITCH(5), TS_PACKET_SIZE);
156 saa_writel(SAA7134_RS_CONTROL(5), control);
159 buf->vb.state = VIDEOBUF_PREPARED;
160 buf->activate = buffer_activate;
161 buf->vb.field = field;
165 saa7134_dma_free(q,buf);
170 buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
172 struct saa7134_dev *dev = q->priv_data;
174 *size = TS_PACKET_SIZE * dev->ts.nr_packets;
176 *count = dev->ts.nr_bufs;
177 *count = saa7134_buffer_count(*size,*count);
179 dev->ts_state = SAA7134_TS_STOPPED;
183 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
185 struct saa7134_dev *dev = q->priv_data;
186 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
188 saa7134_buffer_queue(dev,&dev->ts_q,buf);
191 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
193 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
194 struct saa7134_dev *dev = q->priv_data;
196 if (dev->ts_state == SAA7134_TS_STARTED) {
197 /* Stop TS transport */
198 saa_writeb(SAA7134_TS_PARALLEL, 0x6c);
199 dev->ts_state = SAA7134_TS_STOPPED;
201 saa7134_dma_free(q,buf);
204 struct videobuf_queue_ops saa7134_ts_qops = {
205 .buf_setup = buffer_setup,
206 .buf_prepare = buffer_prepare,
207 .buf_queue = buffer_queue,
208 .buf_release = buffer_release,
210 EXPORT_SYMBOL_GPL(saa7134_ts_qops);
212 /* ----------------------------------------------------------- */
215 static unsigned int tsbufs = 8;
216 module_param(tsbufs, int, 0444);
217 MODULE_PARM_DESC(tsbufs,"number of ts buffers, range 2-32");
219 static unsigned int ts_nr_packets = 64;
220 module_param(ts_nr_packets, int, 0444);
221 MODULE_PARM_DESC(ts_nr_packets,"size of a ts buffers (in ts packets)");
223 int saa7134_ts_init_hw(struct saa7134_dev *dev)
225 /* deactivate TS softreset */
226 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
227 /* TSSOP high active, TSVAL high active, TSLOCK ignored */
228 saa_writeb(SAA7134_TS_PARALLEL, 0x6c);
229 saa_writeb(SAA7134_TS_PARALLEL_SERIAL, (TS_PACKET_SIZE-1));
230 saa_writeb(SAA7134_TS_DMA0, ((dev->ts.nr_packets-1)&0xff));
231 saa_writeb(SAA7134_TS_DMA1, (((dev->ts.nr_packets-1)>>8)&0xff));
232 /* TSNOPIT=0, TSCOLAP=0 */
233 saa_writeb(SAA7134_TS_DMA2,
234 ((((dev->ts.nr_packets-1)>>16)&0x3f) | 0x00));
239 int saa7134_ts_init1(struct saa7134_dev *dev)
241 /* sanitycheck insmod options */
244 if (tsbufs > VIDEO_MAX_FRAME)
245 tsbufs = VIDEO_MAX_FRAME;
246 if (ts_nr_packets < 4)
248 if (ts_nr_packets > 312)
250 dev->ts.nr_bufs = tsbufs;
251 dev->ts.nr_packets = ts_nr_packets;
253 INIT_LIST_HEAD(&dev->ts_q.queue);
254 init_timer(&dev->ts_q.timeout);
255 dev->ts_q.timeout.function = saa7134_buffer_timeout;
256 dev->ts_q.timeout.data = (unsigned long)(&dev->ts_q);
258 dev->ts_q.need_two = 1;
259 saa7134_pgtable_alloc(dev->pci,&dev->ts.pt_ts);
262 saa7134_ts_init_hw(dev);
267 int saa7134_ts_fini(struct saa7134_dev *dev)
269 saa7134_pgtable_free(dev->pci,&dev->ts.pt_ts);
274 void saa7134_irq_ts_done(struct saa7134_dev *dev, unsigned long status)
276 enum v4l2_field field;
278 spin_lock(&dev->slock);
279 if (dev->ts_q.curr) {
280 field = dev->ts_q.curr->vb.field;
281 if (field == V4L2_FIELD_TOP) {
282 if ((status & 0x100000) != 0x000000)
285 if ((status & 0x100000) != 0x100000)
288 saa7134_buffer_finish(dev,&dev->ts_q,VIDEOBUF_DONE);
290 saa7134_buffer_next(dev,&dev->ts_q);
293 spin_unlock(&dev->slock);
296 /* ----------------------------------------------------------- */