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 = 0;
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
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 return 0;
70 }
71
72 static int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
73 enum v4l2_field field)
74 {
75 struct saa7134_dev *dev = q->priv_data;
76 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
77 unsigned int lines, llength, size;
78 u32 control;
79 int err;
80
81 dprintk("buffer_prepare [%p,%s]\n",buf,v4l2_field_names[field]);
82
83 llength = TS_PACKET_SIZE;
84 lines = dev->ts.nr_packets;
85
86 size = lines * llength;
87 if (0 != buf->vb.baddr && buf->vb.bsize < size)
88 return -EINVAL;
89
90 if (buf->vb.size != size) {
91 saa7134_dma_free(q,buf);
92 }
93
94 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
95 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
96
97 buf->vb.width = llength;
98 buf->vb.height = lines;
99 buf->vb.size = size;
100 buf->pt = &dev->ts.pt_ts;
101
102 err = videobuf_iolock(q,&buf->vb,NULL);
103 if (err)
104 goto oops;
105 err = saa7134_pgtable_build(dev->pci,buf->pt,
106 dma->sglist,
107 dma->sglen,
108 saa7134_buffer_startpage(buf));
109 if (err)
110 goto oops;
111 }
112
113 /* dma: setup channel 5 (= TS) */
114 control = SAA7134_RS_CONTROL_BURST_16 |
115 SAA7134_RS_CONTROL_ME |
116 (buf->pt->dma >> 12);
117
118 saa_writeb(SAA7134_TS_DMA0, ((lines-1)&0xff));
119 saa_writeb(SAA7134_TS_DMA1, (((lines-1)>>8)&0xff));
120 saa_writeb(SAA7134_TS_DMA2, ((((lines-1)>>16)&0x3f) | 0x00)); /* TSNOPIT=0, TSCOLAP=0 */
121 saa_writel(SAA7134_RS_PITCH(5),TS_PACKET_SIZE);
122 saa_writel(SAA7134_RS_CONTROL(5),control);
123
124 buf->vb.state = VIDEOBUF_PREPARED;
125 buf->activate = buffer_activate;
126 buf->vb.field = field;
127 return 0;
128
129 oops:
130 saa7134_dma_free(q,buf);
131 return err;
132 }
133
134 static int
135 buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
136 {
137 struct saa7134_dev *dev = q->priv_data;
138
139 *size = TS_PACKET_SIZE * dev->ts.nr_packets;
140 if (0 == *count)
141 *count = dev->ts.nr_bufs;
142 *count = saa7134_buffer_count(*size,*count);
143 return 0;
144 }
145
146 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
147 {
148 struct saa7134_dev *dev = q->priv_data;
149 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
150
151 saa7134_buffer_queue(dev,&dev->ts_q,buf);
152 }
153
154 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
155 {
156 struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
157
158 saa7134_dma_free(q,buf);
159 }
160
161 struct 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 };
167 EXPORT_SYMBOL_GPL(saa7134_ts_qops);
168
169 /* ----------------------------------------------------------- */
170 /* exported stuff */
171
172 static unsigned int tsbufs = 8;
173 module_param(tsbufs, int, 0444);
174 MODULE_PARM_DESC(tsbufs,"number of ts buffers, range 2-32");
175
176 static unsigned int ts_nr_packets = 64;
177 module_param(ts_nr_packets, int, 0444);
178 MODULE_PARM_DESC(ts_nr_packets,"size of a ts buffers (in ts packets)");
179
180 int saa7134_ts_init_hw(struct saa7134_dev *dev)
181 {
182 /* deactivate TS softreset */
183 saa_writeb(SAA7134_TS_SERIAL1, 0x00);
184 /* TSSOP high active, TSVAL high active, TSLOCK ignored */
185 saa_writeb(SAA7134_TS_PARALLEL, 0xec);
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 /* TSNOPIT=0, TSCOLAP=0 */
190 saa_writeb(SAA7134_TS_DMA2,
191 ((((dev->ts.nr_packets-1)>>16)&0x3f) | 0x00));
192
193 return 0;
194 }
195
196 int saa7134_ts_init1(struct saa7134_dev *dev)
197 {
198 /* sanitycheck insmod options */
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 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 int saa7134_ts_fini(struct saa7134_dev *dev)
225 {
226 saa7134_pgtable_free(dev->pci,&dev->ts.pt_ts);
227 return 0;
228 }
229
230
231 void saa7134_irq_ts_done(struct saa7134_dev *dev, unsigned long status)
232 {
233 enum v4l2_field field;
234
235 spin_lock(&dev->slock);
236 if (dev->ts_q.curr) {
237 field = dev->ts_q.curr->vb.field;
238 if (field == V4L2_FIELD_TOP) {
239 if ((status & 0x100000) != 0x000000)
240 goto done;
241 } else {
242 if ((status & 0x100000) != 0x100000)
243 goto done;
244 }
245 saa7134_buffer_finish(dev,&dev->ts_q,VIDEOBUF_DONE);
246 }
247 saa7134_buffer_next(dev,&dev->ts_q);
248
249 done:
250 spin_unlock(&dev->slock);
251 }
252
253 /* ----------------------------------------------------------- */
254 /*
255 * Local variables:
256 * c-basic-offset: 8
257 * End:
258 */
259
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