Merge branch 'upstream'
[linux-2.6] / drivers / media / video / cx25840 / cx25840-vbi.c
1 /* cx25840 VBI functions
2  *
3  * This program is free software; you can redistribute it and/or
4  * modify it under the terms of the GNU General Public License
5  * as published by the Free Software Foundation; either version 2
6  * of the License, or (at your option) any later version.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program; if not, write to the Free Software
15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
16  */
17
18
19 #include <linux/videodev2.h>
20 #include <linux/i2c.h>
21 #include <media/v4l2-common.h>
22 #include <media/cx25840.h>
23
24 #include "cx25840-core.h"
25
26 static int odd_parity(u8 c)
27 {
28         c ^= (c >> 4);
29         c ^= (c >> 2);
30         c ^= (c >> 1);
31
32         return c & 1;
33 }
34
35 static int decode_vps(u8 * dst, u8 * p)
36 {
37         static const u8 biphase_tbl[] = {
38                 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
39                 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
40                 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96,
41                 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2,
42                 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94,
43                 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0,
44                 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
45                 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
46                 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5,
47                 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1,
48                 0xc3, 0x4b, 0x43, 0xc3, 0x87, 0x0f, 0x07, 0x87,
49                 0x83, 0x0b, 0x03, 0x83, 0xc3, 0x4b, 0x43, 0xc3,
50                 0xc1, 0x49, 0x41, 0xc1, 0x85, 0x0d, 0x05, 0x85,
51                 0x81, 0x09, 0x01, 0x81, 0xc1, 0x49, 0x41, 0xc1,
52                 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5,
53                 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1,
54                 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4,
55                 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0,
56                 0xc2, 0x4a, 0x42, 0xc2, 0x86, 0x0e, 0x06, 0x86,
57                 0x82, 0x0a, 0x02, 0x82, 0xc2, 0x4a, 0x42, 0xc2,
58                 0xc0, 0x48, 0x40, 0xc0, 0x84, 0x0c, 0x04, 0x84,
59                 0x80, 0x08, 0x00, 0x80, 0xc0, 0x48, 0x40, 0xc0,
60                 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4,
61                 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0,
62                 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
63                 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
64                 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96,
65                 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2,
66                 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94,
67                 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0,
68                 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
69                 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
70         };
71
72         u8 c, err = 0;
73         int i;
74
75         for (i = 0; i < 2 * 13; i += 2) {
76                 err |= biphase_tbl[p[i]] | biphase_tbl[p[i + 1]];
77                 c = (biphase_tbl[p[i + 1]] & 0xf) |
78                     ((biphase_tbl[p[i]] & 0xf) << 4);
79                 dst[i / 2] = c;
80         }
81
82         return err & 0xf0;
83 }
84
85 void cx25840_vbi_setup(struct i2c_client *client)
86 {
87         v4l2_std_id std = cx25840_get_v4lstd(client);
88
89         if (std & ~V4L2_STD_NTSC) {
90                 /* datasheet startup, step 8d */
91                 cx25840_write(client, 0x49f, 0x11);
92
93                 cx25840_write(client, 0x470, 0x84);
94                 cx25840_write(client, 0x471, 0x00);
95                 cx25840_write(client, 0x472, 0x2d);
96                 cx25840_write(client, 0x473, 0x5d);
97
98                 cx25840_write(client, 0x474, 0x24);
99                 cx25840_write(client, 0x475, 0x40);
100                 cx25840_write(client, 0x476, 0x24);
101                 cx25840_write(client, 0x477, 0x28);
102
103                 cx25840_write(client, 0x478, 0x1f);
104                 cx25840_write(client, 0x479, 0x02);
105
106                 if (std & V4L2_STD_SECAM) {
107                         cx25840_write(client, 0x47a, 0x80);
108                         cx25840_write(client, 0x47b, 0x00);
109                         cx25840_write(client, 0x47c, 0x5f);
110                         cx25840_write(client, 0x47d, 0x42);
111                 } else {
112                         cx25840_write(client, 0x47a, 0x90);
113                         cx25840_write(client, 0x47b, 0x20);
114                         cx25840_write(client, 0x47c, 0x63);
115                         cx25840_write(client, 0x47d, 0x82);
116                 }
117
118                 cx25840_write(client, 0x47e, 0x0a);
119                 cx25840_write(client, 0x47f, 0x01);
120         } else {
121                 /* datasheet startup, step 8d */
122                 cx25840_write(client, 0x49f, 0x14);
123
124                 cx25840_write(client, 0x470, 0x7a);
125                 cx25840_write(client, 0x471, 0x00);
126                 cx25840_write(client, 0x472, 0x2d);
127                 cx25840_write(client, 0x473, 0x5b);
128
129                 cx25840_write(client, 0x474, 0x1a);
130                 cx25840_write(client, 0x475, 0x70);
131                 cx25840_write(client, 0x476, 0x1e);
132                 cx25840_write(client, 0x477, 0x1e);
133
134                 cx25840_write(client, 0x478, 0x1f);
135                 cx25840_write(client, 0x479, 0x02);
136                 cx25840_write(client, 0x47a, 0x50);
137                 cx25840_write(client, 0x47b, 0x66);
138
139                 cx25840_write(client, 0x47c, 0x1f);
140                 cx25840_write(client, 0x47d, 0x7c);
141                 cx25840_write(client, 0x47e, 0x08);
142                 cx25840_write(client, 0x47f, 0x00);
143         }
144 }
145
146 int cx25840_vbi(struct i2c_client *client, unsigned int cmd, void *arg)
147 {
148         struct v4l2_format *fmt;
149         struct v4l2_sliced_vbi_format *svbi;
150
151         switch (cmd) {
152         case VIDIOC_G_FMT:
153         {
154                 static u16 lcr2vbi[] = {
155                         0, V4L2_SLICED_TELETEXT_B, 0,   /* 1 */
156                         0, V4L2_SLICED_WSS_625, 0,      /* 4 */
157                         V4L2_SLICED_CAPTION_525,        /* 6 */
158                         0, 0, V4L2_SLICED_VPS, 0, 0,    /* 9 */
159                         0, 0, 0, 0
160                 };
161                 int i;
162
163                 fmt = arg;
164                 if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
165                         return -EINVAL;
166                 svbi = &fmt->fmt.sliced;
167                 memset(svbi, 0, sizeof(*svbi));
168                 /* we're done if raw VBI is active */
169                 if ((cx25840_read(client, 0x404) & 0x10) == 0)
170                         break;
171
172                 for (i = 7; i <= 23; i++) {
173                         u8 v = cx25840_read(client, 0x424 + i - 7);
174
175                         svbi->service_lines[0][i] = lcr2vbi[v >> 4];
176                         svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
177                         svbi->service_set |=
178                                  svbi->service_lines[0][i] | svbi->service_lines[1][i];
179                 }
180                 break;
181         }
182
183         case VIDIOC_S_FMT:
184         {
185                 int is_pal = !(cx25840_get_v4lstd(client) & V4L2_STD_NTSC);
186                 int vbi_offset = is_pal ? 1 : 0;
187                 int i, x;
188                 u8 lcr[24];
189
190                 fmt = arg;
191                 if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
192                         return -EINVAL;
193                 svbi = &fmt->fmt.sliced;
194                 if (svbi->service_set == 0) {
195                         /* raw VBI */
196                         memset(svbi, 0, sizeof(*svbi));
197
198                         /* Setup VBI */
199                         cx25840_vbi_setup(client);
200
201                         /* VBI Offset */
202                         cx25840_write(client, 0x47f, vbi_offset);
203                         cx25840_write(client, 0x404, 0x2e);
204                         break;
205                 }
206
207                 for (x = 0; x <= 23; x++)
208                         lcr[x] = 0x00;
209
210                 /* Setup VBI */
211                 cx25840_vbi_setup(client);
212
213                 /* Sliced VBI */
214                 cx25840_write(client, 0x404, 0x36);     /* Ancillery data */
215                 cx25840_write(client, 0x406, 0x13);
216                 cx25840_write(client, 0x47f, vbi_offset);
217
218                 if (is_pal) {
219                         for (i = 0; i <= 6; i++)
220                                 svbi->service_lines[0][i] =
221                                         svbi->service_lines[1][i] = 0;
222                 } else {
223                         for (i = 0; i <= 9; i++)
224                                 svbi->service_lines[0][i] =
225                                         svbi->service_lines[1][i] = 0;
226
227                         for (i = 22; i <= 23; i++)
228                                 svbi->service_lines[0][i] =
229                                         svbi->service_lines[1][i] = 0;
230                 }
231
232                 for (i = 7; i <= 23; i++) {
233                         for (x = 0; x <= 1; x++) {
234                                 switch (svbi->service_lines[1-x][i]) {
235                                 case V4L2_SLICED_TELETEXT_B:
236                                         lcr[i] |= 1 << (4 * x);
237                                         break;
238                                 case V4L2_SLICED_WSS_625:
239                                         lcr[i] |= 4 << (4 * x);
240                                         break;
241                                 case V4L2_SLICED_CAPTION_525:
242                                         lcr[i] |= 6 << (4 * x);
243                                         break;
244                                 case V4L2_SLICED_VPS:
245                                         lcr[i] |= 9 << (4 * x);
246                                         break;
247                                 }
248                         }
249                 }
250
251                 for (x = 1, i = 0x424; i <= 0x434; i++, x++) {
252                         cx25840_write(client, i, lcr[6 + x]);
253                 }
254
255                 cx25840_write(client, 0x43c, 0x16);
256
257                 if (is_pal) {
258                         cx25840_write(client, 0x474, 0x2a);
259                 } else {
260                         cx25840_write(client, 0x474, 0x1a + 6);
261                 }
262                 break;
263         }
264
265         case VIDIOC_INT_DECODE_VBI_LINE:
266         {
267                 struct v4l2_decode_vbi_line *vbi = arg;
268                 u8 *p = vbi->p;
269                 int id1, id2, l, err = 0;
270
271                 if (p[0] || p[1] != 0xff || p[2] != 0xff ||
272                     (p[3] != 0x55 && p[3] != 0x91)) {
273                         vbi->line = vbi->type = 0;
274                         break;
275                 }
276
277                 p += 4;
278                 id1 = p[-1];
279                 id2 = p[0] & 0xf;
280                 l = p[2] & 0x3f;
281                 l += 5;
282                 p += 4;
283
284                 switch (id2) {
285                 case 1:
286                         id2 = V4L2_SLICED_TELETEXT_B;
287                         break;
288                 case 4:
289                         id2 = V4L2_SLICED_WSS_625;
290                         break;
291                 case 6:
292                         id2 = V4L2_SLICED_CAPTION_525;
293                         err = !odd_parity(p[0]) || !odd_parity(p[1]);
294                         break;
295                 case 9:
296                         id2 = V4L2_SLICED_VPS;
297                         if (decode_vps(p, p) != 0) {
298                                 err = 1;
299                         }
300                         break;
301                 default:
302                         id2 = 0;
303                         err = 1;
304                         break;
305                 }
306
307                 vbi->type = err ? 0 : id2;
308                 vbi->line = err ? 0 : l;
309                 vbi->is_second_field = err ? 0 : (id1 == 0x55);
310                 vbi->p = p;
311                 break;
312         }
313         }
314
315         return 0;
316 }