V4L/DVB (6079): Cleanup: remove linux/moduleparam.h from drivers/media files
[linux-2.6.git] / drivers / media / video / saa7134 / saa7134-ts.c
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 = STATE_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 (STATE_NEEDS_INIT == buf->vb.state) {
95                 buf->vb.width  = llength;
96                 buf->vb.height = lines;
97                 buf->vb.size   = size;
98                 buf->pt        = &dev->ts.pt_ts;
99
100                 err = videobuf_iolock(q,&buf->vb,NULL);
101                 if (err)
102                         goto oops;
103                 err = saa7134_pgtable_build(dev->pci,buf->pt,
104                                             buf->vb.dma.sglist,
105                                             buf->vb.dma.sglen,
106                                             saa7134_buffer_startpage(buf));
107                 if (err)
108                         goto oops;
109         }
110
111         /* dma: setup channel 5 (= TS) */
112         control = SAA7134_RS_CONTROL_BURST_16 |
113                   SAA7134_RS_CONTROL_ME |
114                   (buf->pt->dma >> 12);
115
116         saa_writeb(SAA7134_TS_DMA0, ((lines-1)&0xff));
117         saa_writeb(SAA7134_TS_DMA1, (((lines-1)>>8)&0xff));
118         saa_writeb(SAA7134_TS_DMA2, ((((lines-1)>>16)&0x3f) | 0x00)); /* TSNOPIT=0, TSCOLAP=0 */
119         saa_writel(SAA7134_RS_PITCH(5),TS_PACKET_SIZE);
120         saa_writel(SAA7134_RS_CONTROL(5),control);
121
122         buf->vb.state = STATE_PREPARED;
123         buf->activate = buffer_activate;
124         buf->vb.field = field;
125         return 0;
126
127  oops:
128         saa7134_dma_free(q,buf);
129         return err;
130 }
131
132 static int
133 buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
134 {
135         struct saa7134_dev *dev = q->priv_data;
136
137         *size = TS_PACKET_SIZE * dev->ts.nr_packets;
138         if (0 == *count)
139                 *count = dev->ts.nr_bufs;
140         *count = saa7134_buffer_count(*size,*count);
141         return 0;
142 }
143
144 static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
145 {
146         struct saa7134_dev *dev = q->priv_data;
147         struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
148
149         saa7134_buffer_queue(dev,&dev->ts_q,buf);
150 }
151
152 static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
153 {
154         struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb);
155
156         saa7134_dma_free(q,buf);
157 }
158
159 struct videobuf_queue_ops saa7134_ts_qops = {
160         .buf_setup    = buffer_setup,
161         .buf_prepare  = buffer_prepare,
162         .buf_queue    = buffer_queue,
163         .buf_release  = buffer_release,
164 };
165 EXPORT_SYMBOL_GPL(saa7134_ts_qops);
166
167 /* ----------------------------------------------------------- */
168 /* exported stuff                                              */
169
170 static unsigned int tsbufs = 8;
171 module_param(tsbufs, int, 0444);
172 MODULE_PARM_DESC(tsbufs,"number of ts buffers, range 2-32");
173
174 static unsigned int ts_nr_packets = 64;
175 module_param(ts_nr_packets, int, 0444);
176 MODULE_PARM_DESC(ts_nr_packets,"size of a ts buffers (in ts packets)");
177
178 int saa7134_ts_init1(struct saa7134_dev *dev)
179 {
180         /* sanitycheck insmod options */
181         if (tsbufs < 2)
182                 tsbufs = 2;
183         if (tsbufs > VIDEO_MAX_FRAME)
184                 tsbufs = VIDEO_MAX_FRAME;
185         if (ts_nr_packets < 4)
186                 ts_nr_packets = 4;
187         if (ts_nr_packets > 312)
188                 ts_nr_packets = 312;
189         dev->ts.nr_bufs    = tsbufs;
190         dev->ts.nr_packets = ts_nr_packets;
191
192         INIT_LIST_HEAD(&dev->ts_q.queue);
193         init_timer(&dev->ts_q.timeout);
194         dev->ts_q.timeout.function = saa7134_buffer_timeout;
195         dev->ts_q.timeout.data     = (unsigned long)(&dev->ts_q);
196         dev->ts_q.dev              = dev;
197         dev->ts_q.need_two         = 1;
198         saa7134_pgtable_alloc(dev->pci,&dev->ts.pt_ts);
199
200         /* init TS hw */
201         saa_writeb(SAA7134_TS_SERIAL1, 0x00);  /* deactivate TS softreset */
202         saa_writeb(SAA7134_TS_PARALLEL, 0xec); /* TSSOP high active, TSVAL high active, TSLOCK ignored */
203         saa_writeb(SAA7134_TS_PARALLEL_SERIAL, (TS_PACKET_SIZE-1));
204         saa_writeb(SAA7134_TS_DMA0, ((dev->ts.nr_packets-1)&0xff));
205         saa_writeb(SAA7134_TS_DMA1, (((dev->ts.nr_packets-1)>>8)&0xff));
206         saa_writeb(SAA7134_TS_DMA2, ((((dev->ts.nr_packets-1)>>16)&0x3f) | 0x00)); /* TSNOPIT=0, TSCOLAP=0 */
207
208         return 0;
209 }
210
211 int saa7134_ts_fini(struct saa7134_dev *dev)
212 {
213         saa7134_pgtable_free(dev->pci,&dev->ts.pt_ts);
214         return 0;
215 }
216
217
218 void saa7134_irq_ts_done(struct saa7134_dev *dev, unsigned long status)
219 {
220         enum v4l2_field field;
221
222         spin_lock(&dev->slock);
223         if (dev->ts_q.curr) {
224                 field = dev->ts_q.curr->vb.field;
225                 if (field == V4L2_FIELD_TOP) {
226                         if ((status & 0x100000) != 0x000000)
227                                 goto done;
228                 } else {
229                         if ((status & 0x100000) != 0x100000)
230                                 goto done;
231                 }
232                 saa7134_buffer_finish(dev,&dev->ts_q,STATE_DONE);
233         }
234         saa7134_buffer_next(dev,&dev->ts_q);
235
236  done:
237         spin_unlock(&dev->slock);
238 }
239
240 /* ----------------------------------------------------------- */
241 /*
242  * Local variables:
243  * c-basic-offset: 8
244  * End:
245  */