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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
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/moduleparam.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/delay.h> | |
30 | ||
31 | #include "saa7134-reg.h" | |
32 | #include "saa7134.h" | |
33 | ||
34 | /* ------------------------------------------------------------------ */ | |
35 | ||
36 | static unsigned int ts_debug = 0; | |
37 | module_param(ts_debug, int, 0644); | |
38 | MODULE_PARM_DESC(ts_debug,"enable debug messages [ts]"); | |
39 | ||
40 | #define dprintk(fmt, arg...) if (ts_debug) \ | |
41 | printk(KERN_DEBUG "%s/ts: " fmt, dev->name , ## arg) | |
42 | ||
43 | /* ------------------------------------------------------------------ */ | |
44 | ||
45 | static int buffer_activate(struct saa7134_dev *dev, | |
46 | struct saa7134_buf *buf, | |
47 | struct saa7134_buf *next) | |
48 | { | |
1da177e4 LT |
49 | |
50 | dprintk("buffer_activate [%p]",buf); | |
51 | buf->vb.state = STATE_ACTIVE; | |
52 | buf->top_seen = 0; | |
53 | ||
1da177e4 LT |
54 | if (NULL == next) |
55 | next = buf; | |
56 | if (V4L2_FIELD_TOP == buf->vb.field) { | |
57 | dprintk("- [top] buf=%p next=%p\n",buf,next); | |
58 | saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(buf)); | |
59 | saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(next)); | |
60 | } else { | |
61 | dprintk("- [bottom] buf=%p next=%p\n",buf,next); | |
62 | saa_writel(SAA7134_RS_BA1(5),saa7134_buffer_base(next)); | |
63 | saa_writel(SAA7134_RS_BA2(5),saa7134_buffer_base(buf)); | |
64 | } | |
1da177e4 LT |
65 | |
66 | /* start DMA */ | |
67 | saa7134_set_dmabits(dev); | |
68 | ||
69 | mod_timer(&dev->ts_q.timeout, jiffies+BUFFER_TIMEOUT); | |
70 | return 0; | |
71 | } | |
72 | ||
73 | static int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb, | |
74 | enum v4l2_field field) | |
75 | { | |
76 | struct saa7134_dev *dev = q->priv_data; | |
77 | struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb); | |
78 | unsigned int lines, llength, size; | |
3aa4f48a | 79 | u32 control; |
1da177e4 LT |
80 | int err; |
81 | ||
82 | dprintk("buffer_prepare [%p,%s]\n",buf,v4l2_field_names[field]); | |
83 | ||
84 | llength = TS_PACKET_SIZE; | |
85 | lines = dev->ts.nr_packets; | |
86 | ||
87 | size = lines * llength; | |
88 | if (0 != buf->vb.baddr && buf->vb.bsize < size) | |
89 | return -EINVAL; | |
90 | ||
91 | if (buf->vb.size != size) { | |
c7b0ac05 | 92 | saa7134_dma_free(q,buf); |
1da177e4 LT |
93 | } |
94 | ||
95 | if (STATE_NEEDS_INIT == buf->vb.state) { | |
96 | buf->vb.width = llength; | |
97 | buf->vb.height = lines; | |
98 | buf->vb.size = size; | |
99 | buf->pt = &dev->ts.pt_ts; | |
100 | ||
c7b0ac05 | 101 | err = videobuf_iolock(q,&buf->vb,NULL); |
1da177e4 LT |
102 | if (err) |
103 | goto oops; | |
104 | err = saa7134_pgtable_build(dev->pci,buf->pt, | |
105 | buf->vb.dma.sglist, | |
106 | buf->vb.dma.sglen, | |
107 | saa7134_buffer_startpage(buf)); | |
108 | if (err) | |
109 | goto oops; | |
110 | } | |
3aa4f48a HH |
111 | |
112 | /* dma: setup channel 5 (= TS) */ | |
113 | control = SAA7134_RS_CONTROL_BURST_16 | | |
4ac97914 MCC |
114 | SAA7134_RS_CONTROL_ME | |
115 | (buf->pt->dma >> 12); | |
3aa4f48a HH |
116 | |
117 | saa_writeb(SAA7134_TS_DMA0, ((lines-1)&0xff)); | |
118 | saa_writeb(SAA7134_TS_DMA1, (((lines-1)>>8)&0xff)); | |
119 | saa_writeb(SAA7134_TS_DMA2, ((((lines-1)>>16)&0x3f) | 0x00)); /* TSNOPIT=0, TSCOLAP=0 */ | |
120 | saa_writel(SAA7134_RS_PITCH(5),TS_PACKET_SIZE); | |
121 | saa_writel(SAA7134_RS_CONTROL(5),control); | |
122 | ||
1da177e4 LT |
123 | buf->vb.state = STATE_PREPARED; |
124 | buf->activate = buffer_activate; | |
125 | buf->vb.field = field; | |
126 | return 0; | |
127 | ||
128 | oops: | |
c7b0ac05 | 129 | saa7134_dma_free(q,buf); |
1da177e4 LT |
130 | return err; |
131 | } | |
132 | ||
133 | static int | |
134 | buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) | |
135 | { | |
136 | struct saa7134_dev *dev = q->priv_data; | |
137 | ||
138 | *size = TS_PACKET_SIZE * dev->ts.nr_packets; | |
139 | if (0 == *count) | |
140 | *count = dev->ts.nr_bufs; | |
141 | *count = saa7134_buffer_count(*size,*count); | |
142 | return 0; | |
143 | } | |
144 | ||
145 | static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb) | |
146 | { | |
147 | struct saa7134_dev *dev = q->priv_data; | |
148 | struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb); | |
149 | ||
150 | saa7134_buffer_queue(dev,&dev->ts_q,buf); | |
151 | } | |
152 | ||
153 | static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb) | |
154 | { | |
1da177e4 LT |
155 | struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb); |
156 | ||
c7b0ac05 | 157 | saa7134_dma_free(q,buf); |
1da177e4 LT |
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 | ||
3aa4f48a | 171 | static unsigned int tsbufs = 8; |
1da177e4 LT |
172 | module_param(tsbufs, int, 0444); |
173 | MODULE_PARM_DESC(tsbufs,"number of ts buffers, range 2-32"); | |
174 | ||
3aa4f48a | 175 | static unsigned int ts_nr_packets = 64; |
1da177e4 LT |
176 | module_param(ts_nr_packets, int, 0444); |
177 | MODULE_PARM_DESC(ts_nr_packets,"size of a ts buffers (in ts packets)"); | |
178 | ||
179 | int saa7134_ts_init1(struct saa7134_dev *dev) | |
180 | { | |
181 | /* sanitycheck insmod options */ | |
182 | if (tsbufs < 2) | |
183 | tsbufs = 2; | |
184 | if (tsbufs > VIDEO_MAX_FRAME) | |
185 | tsbufs = VIDEO_MAX_FRAME; | |
186 | if (ts_nr_packets < 4) | |
187 | ts_nr_packets = 4; | |
188 | if (ts_nr_packets > 312) | |
189 | ts_nr_packets = 312; | |
190 | dev->ts.nr_bufs = tsbufs; | |
191 | dev->ts.nr_packets = ts_nr_packets; | |
192 | ||
193 | INIT_LIST_HEAD(&dev->ts_q.queue); | |
194 | init_timer(&dev->ts_q.timeout); | |
195 | dev->ts_q.timeout.function = saa7134_buffer_timeout; | |
196 | dev->ts_q.timeout.data = (unsigned long)(&dev->ts_q); | |
197 | dev->ts_q.dev = dev; | |
198 | dev->ts_q.need_two = 1; | |
199 | saa7134_pgtable_alloc(dev->pci,&dev->ts.pt_ts); | |
200 | ||
201 | /* init TS hw */ | |
202 | saa_writeb(SAA7134_TS_SERIAL1, 0x00); /* deactivate TS softreset */ | |
203 | saa_writeb(SAA7134_TS_PARALLEL, 0xec); /* TSSOP high active, TSVAL high active, TSLOCK ignored */ | |
204 | saa_writeb(SAA7134_TS_PARALLEL_SERIAL, (TS_PACKET_SIZE-1)); | |
205 | saa_writeb(SAA7134_TS_DMA0, ((dev->ts.nr_packets-1)&0xff)); | |
206 | saa_writeb(SAA7134_TS_DMA1, (((dev->ts.nr_packets-1)>>8)&0xff)); | |
207 | saa_writeb(SAA7134_TS_DMA2, ((((dev->ts.nr_packets-1)>>16)&0x3f) | 0x00)); /* TSNOPIT=0, TSCOLAP=0 */ | |
208 | ||
209 | return 0; | |
210 | } | |
211 | ||
212 | int saa7134_ts_fini(struct saa7134_dev *dev) | |
213 | { | |
214 | saa7134_pgtable_free(dev->pci,&dev->ts.pt_ts); | |
215 | return 0; | |
216 | } | |
217 | ||
218 | ||
219 | void saa7134_irq_ts_done(struct saa7134_dev *dev, unsigned long status) | |
220 | { | |
221 | enum v4l2_field field; | |
222 | ||
223 | spin_lock(&dev->slock); | |
224 | if (dev->ts_q.curr) { | |
225 | field = dev->ts_q.curr->vb.field; | |
226 | if (field == V4L2_FIELD_TOP) { | |
3aa4f48a | 227 | if ((status & 0x100000) != 0x000000) |
1da177e4 LT |
228 | goto done; |
229 | } else { | |
3aa4f48a | 230 | if ((status & 0x100000) != 0x100000) |
1da177e4 LT |
231 | goto done; |
232 | } | |
233 | saa7134_buffer_finish(dev,&dev->ts_q,STATE_DONE); | |
234 | } | |
235 | saa7134_buffer_next(dev,&dev->ts_q); | |
236 | ||
237 | done: | |
238 | spin_unlock(&dev->slock); | |
239 | } | |
240 | ||
241 | /* ----------------------------------------------------------- */ | |
242 | /* | |
243 | * Local variables: | |
244 | * c-basic-offset: 8 | |
245 | * End: | |
246 | */ |