diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/media/video/saa7134/saa7134-vbi.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/media/video/saa7134/saa7134-vbi.c')
-rw-r--r-- | drivers/media/video/saa7134/saa7134-vbi.c | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/drivers/media/video/saa7134/saa7134-vbi.c b/drivers/media/video/saa7134/saa7134-vbi.c new file mode 100644 index 000000000000..86954cc7c377 --- /dev/null +++ b/drivers/media/video/saa7134/saa7134-vbi.c | |||
@@ -0,0 +1,270 @@ | |||
1 | /* | ||
2 | * $Id: saa7134-vbi.c,v 1.6 2004/12/10 12:33:39 kraxel Exp $ | ||
3 | * | ||
4 | * device driver for philips saa7134 based TV cards | ||
5 | * video4linux video interface | ||
6 | * | ||
7 | * (c) 2001,02 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs] | ||
8 | * | ||
9 | * This program is free software; you can redistribute it and/or modify | ||
10 | * it under the terms of the GNU General Public License as published by | ||
11 | * the Free Software Foundation; either version 2 of the License, or | ||
12 | * (at your option) any later version. | ||
13 | * | ||
14 | * This program is distributed in the hope that it will be useful, | ||
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
17 | * GNU General Public License for more details. | ||
18 | * | ||
19 | * You should have received a copy of the GNU General Public License | ||
20 | * along with this program; if not, write to the Free Software | ||
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
22 | */ | ||
23 | |||
24 | #include <linux/init.h> | ||
25 | #include <linux/list.h> | ||
26 | #include <linux/module.h> | ||
27 | #include <linux/moduleparam.h> | ||
28 | #include <linux/kernel.h> | ||
29 | #include <linux/slab.h> | ||
30 | |||
31 | #include "saa7134-reg.h" | ||
32 | #include "saa7134.h" | ||
33 | |||
34 | /* ------------------------------------------------------------------ */ | ||
35 | |||
36 | static unsigned int vbi_debug = 0; | ||
37 | module_param(vbi_debug, int, 0644); | ||
38 | MODULE_PARM_DESC(vbi_debug,"enable debug messages [vbi]"); | ||
39 | |||
40 | static unsigned int vbibufs = 4; | ||
41 | module_param(vbibufs, int, 0444); | ||
42 | MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32"); | ||
43 | |||
44 | #define dprintk(fmt, arg...) if (vbi_debug) \ | ||
45 | printk(KERN_DEBUG "%s/vbi: " fmt, dev->name , ## arg) | ||
46 | |||
47 | /* ------------------------------------------------------------------ */ | ||
48 | |||
49 | #define VBI_LINE_COUNT 16 | ||
50 | #define VBI_LINE_LENGTH 2048 | ||
51 | #define VBI_SCALE 0x200 | ||
52 | |||
53 | static void task_init(struct saa7134_dev *dev, struct saa7134_buf *buf, | ||
54 | int task) | ||
55 | { | ||
56 | struct saa7134_tvnorm *norm = dev->tvnorm; | ||
57 | |||
58 | /* setup video scaler */ | ||
59 | saa_writeb(SAA7134_VBI_H_START1(task), norm->h_start & 0xff); | ||
60 | saa_writeb(SAA7134_VBI_H_START2(task), norm->h_start >> 8); | ||
61 | saa_writeb(SAA7134_VBI_H_STOP1(task), norm->h_stop & 0xff); | ||
62 | saa_writeb(SAA7134_VBI_H_STOP2(task), norm->h_stop >> 8); | ||
63 | saa_writeb(SAA7134_VBI_V_START1(task), norm->vbi_v_start & 0xff); | ||
64 | saa_writeb(SAA7134_VBI_V_START2(task), norm->vbi_v_start >> 8); | ||
65 | saa_writeb(SAA7134_VBI_V_STOP1(task), norm->vbi_v_stop & 0xff); | ||
66 | saa_writeb(SAA7134_VBI_V_STOP2(task), norm->vbi_v_stop >> 8); | ||
67 | |||
68 | saa_writeb(SAA7134_VBI_H_SCALE_INC1(task), VBI_SCALE & 0xff); | ||
69 | saa_writeb(SAA7134_VBI_H_SCALE_INC2(task), VBI_SCALE >> 8); | ||
70 | saa_writeb(SAA7134_VBI_PHASE_OFFSET_LUMA(task), 0x00); | ||
71 | saa_writeb(SAA7134_VBI_PHASE_OFFSET_CHROMA(task), 0x00); | ||
72 | |||
73 | saa_writeb(SAA7134_VBI_H_LEN1(task), buf->vb.width & 0xff); | ||
74 | saa_writeb(SAA7134_VBI_H_LEN2(task), buf->vb.width >> 8); | ||
75 | saa_writeb(SAA7134_VBI_V_LEN1(task), buf->vb.height & 0xff); | ||
76 | saa_writeb(SAA7134_VBI_V_LEN2(task), buf->vb.height >> 8); | ||
77 | |||
78 | saa_andorb(SAA7134_DATA_PATH(task), 0xc0, 0x00); | ||
79 | } | ||
80 | |||
81 | /* ------------------------------------------------------------------ */ | ||
82 | |||
83 | static int buffer_activate(struct saa7134_dev *dev, | ||
84 | struct saa7134_buf *buf, | ||
85 | struct saa7134_buf *next) | ||
86 | { | ||
87 | unsigned long control,base; | ||
88 | |||
89 | dprintk("buffer_activate [%p]\n",buf); | ||
90 | buf->vb.state = STATE_ACTIVE; | ||
91 | buf->top_seen = 0; | ||
92 | |||
93 | task_init(dev,buf,TASK_A); | ||
94 | task_init(dev,buf,TASK_B); | ||
95 | saa_writeb(SAA7134_OFMT_DATA_A, 0x06); | ||
96 | saa_writeb(SAA7134_OFMT_DATA_B, 0x06); | ||
97 | |||
98 | /* DMA: setup channel 2+3 (= VBI Task A+B) */ | ||
99 | base = saa7134_buffer_base(buf); | ||
100 | control = SAA7134_RS_CONTROL_BURST_16 | | ||
101 | SAA7134_RS_CONTROL_ME | | ||
102 | (buf->pt->dma >> 12); | ||
103 | saa_writel(SAA7134_RS_BA1(2),base); | ||
104 | saa_writel(SAA7134_RS_BA2(2),base + buf->vb.size/2); | ||
105 | saa_writel(SAA7134_RS_PITCH(2),buf->vb.width); | ||
106 | saa_writel(SAA7134_RS_CONTROL(2),control); | ||
107 | saa_writel(SAA7134_RS_BA1(3),base); | ||
108 | saa_writel(SAA7134_RS_BA2(3),base + buf->vb.size/2); | ||
109 | saa_writel(SAA7134_RS_PITCH(3),buf->vb.width); | ||
110 | saa_writel(SAA7134_RS_CONTROL(3),control); | ||
111 | |||
112 | /* start DMA */ | ||
113 | saa7134_set_dmabits(dev); | ||
114 | mod_timer(&dev->vbi_q.timeout, jiffies+BUFFER_TIMEOUT); | ||
115 | |||
116 | return 0; | ||
117 | } | ||
118 | |||
119 | static int buffer_prepare(struct videobuf_queue *q, | ||
120 | struct videobuf_buffer *vb, | ||
121 | enum v4l2_field field) | ||
122 | { | ||
123 | struct saa7134_fh *fh = q->priv_data; | ||
124 | struct saa7134_dev *dev = fh->dev; | ||
125 | struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb); | ||
126 | struct saa7134_tvnorm *norm = dev->tvnorm; | ||
127 | unsigned int lines, llength, size; | ||
128 | int err; | ||
129 | |||
130 | lines = norm->vbi_v_stop - norm->vbi_v_start +1; | ||
131 | if (lines > VBI_LINE_COUNT) | ||
132 | lines = VBI_LINE_COUNT; | ||
133 | #if 1 | ||
134 | llength = VBI_LINE_LENGTH; | ||
135 | #else | ||
136 | llength = (norm->h_stop - norm->h_start +1) * 2; | ||
137 | if (llength > VBI_LINE_LENGTH) | ||
138 | llength = VBI_LINE_LENGTH; | ||
139 | #endif | ||
140 | size = lines * llength * 2; | ||
141 | if (0 != buf->vb.baddr && buf->vb.bsize < size) | ||
142 | return -EINVAL; | ||
143 | |||
144 | if (buf->vb.size != size) | ||
145 | saa7134_dma_free(dev,buf); | ||
146 | |||
147 | if (STATE_NEEDS_INIT == buf->vb.state) { | ||
148 | buf->vb.width = llength; | ||
149 | buf->vb.height = lines; | ||
150 | buf->vb.size = size; | ||
151 | buf->pt = &fh->pt_vbi; | ||
152 | |||
153 | err = videobuf_iolock(dev->pci,&buf->vb,NULL); | ||
154 | if (err) | ||
155 | goto oops; | ||
156 | err = saa7134_pgtable_build(dev->pci,buf->pt, | ||
157 | buf->vb.dma.sglist, | ||
158 | buf->vb.dma.sglen, | ||
159 | saa7134_buffer_startpage(buf)); | ||
160 | if (err) | ||
161 | goto oops; | ||
162 | } | ||
163 | buf->vb.state = STATE_PREPARED; | ||
164 | buf->activate = buffer_activate; | ||
165 | buf->vb.field = field; | ||
166 | return 0; | ||
167 | |||
168 | oops: | ||
169 | saa7134_dma_free(dev,buf); | ||
170 | return err; | ||
171 | } | ||
172 | |||
173 | static int | ||
174 | buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) | ||
175 | { | ||
176 | struct saa7134_fh *fh = q->priv_data; | ||
177 | struct saa7134_dev *dev = fh->dev; | ||
178 | int llength,lines; | ||
179 | |||
180 | lines = dev->tvnorm->vbi_v_stop - dev->tvnorm->vbi_v_start +1; | ||
181 | #if 1 | ||
182 | llength = VBI_LINE_LENGTH; | ||
183 | #else | ||
184 | llength = (norm->h_stop - norm->h_start +1) * 2; | ||
185 | if (llength > VBI_LINE_LENGTH) | ||
186 | llength = VBI_LINE_LENGTH; | ||
187 | #endif | ||
188 | *size = lines * llength * 2; | ||
189 | if (0 == *count) | ||
190 | *count = vbibufs; | ||
191 | *count = saa7134_buffer_count(*size,*count); | ||
192 | return 0; | ||
193 | } | ||
194 | |||
195 | static void buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb) | ||
196 | { | ||
197 | struct saa7134_fh *fh = q->priv_data; | ||
198 | struct saa7134_dev *dev = fh->dev; | ||
199 | struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb); | ||
200 | |||
201 | saa7134_buffer_queue(dev,&dev->vbi_q,buf); | ||
202 | } | ||
203 | |||
204 | static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb) | ||
205 | { | ||
206 | struct saa7134_fh *fh = q->priv_data; | ||
207 | struct saa7134_dev *dev = fh->dev; | ||
208 | struct saa7134_buf *buf = container_of(vb,struct saa7134_buf,vb); | ||
209 | |||
210 | saa7134_dma_free(dev,buf); | ||
211 | } | ||
212 | |||
213 | struct videobuf_queue_ops saa7134_vbi_qops = { | ||
214 | .buf_setup = buffer_setup, | ||
215 | .buf_prepare = buffer_prepare, | ||
216 | .buf_queue = buffer_queue, | ||
217 | .buf_release = buffer_release, | ||
218 | }; | ||
219 | |||
220 | /* ------------------------------------------------------------------ */ | ||
221 | |||
222 | int saa7134_vbi_init1(struct saa7134_dev *dev) | ||
223 | { | ||
224 | INIT_LIST_HEAD(&dev->vbi_q.queue); | ||
225 | init_timer(&dev->vbi_q.timeout); | ||
226 | dev->vbi_q.timeout.function = saa7134_buffer_timeout; | ||
227 | dev->vbi_q.timeout.data = (unsigned long)(&dev->vbi_q); | ||
228 | dev->vbi_q.dev = dev; | ||
229 | |||
230 | if (vbibufs < 2) | ||
231 | vbibufs = 2; | ||
232 | if (vbibufs > VIDEO_MAX_FRAME) | ||
233 | vbibufs = VIDEO_MAX_FRAME; | ||
234 | return 0; | ||
235 | } | ||
236 | |||
237 | int saa7134_vbi_fini(struct saa7134_dev *dev) | ||
238 | { | ||
239 | /* nothing */ | ||
240 | return 0; | ||
241 | } | ||
242 | |||
243 | void saa7134_irq_vbi_done(struct saa7134_dev *dev, unsigned long status) | ||
244 | { | ||
245 | spin_lock(&dev->slock); | ||
246 | if (dev->vbi_q.curr) { | ||
247 | dev->vbi_fieldcount++; | ||
248 | /* make sure we have seen both fields */ | ||
249 | if ((status & 0x10) == 0x00) { | ||
250 | dev->vbi_q.curr->top_seen = 1; | ||
251 | goto done; | ||
252 | } | ||
253 | if (!dev->vbi_q.curr->top_seen) | ||
254 | goto done; | ||
255 | |||
256 | dev->vbi_q.curr->vb.field_count = dev->vbi_fieldcount; | ||
257 | saa7134_buffer_finish(dev,&dev->vbi_q,STATE_DONE); | ||
258 | } | ||
259 | saa7134_buffer_next(dev,&dev->vbi_q); | ||
260 | |||
261 | done: | ||
262 | spin_unlock(&dev->slock); | ||
263 | } | ||
264 | |||
265 | /* ----------------------------------------------------------- */ | ||
266 | /* | ||
267 | * Local variables: | ||
268 | * c-basic-offset: 8 | ||
269 | * End: | ||
270 | */ | ||