Merge master.kernel.org:/home/rmk/linux-2.6-arm
[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 int cx25840_vbi(struct i2c_client *client, unsigned int cmd, void *arg)
86 {
87         struct cx25840_state *state = to_state(i2c_get_clientdata(client));
88         struct v4l2_format *fmt;
89         struct v4l2_sliced_vbi_format *svbi;
90
91         switch (cmd) {
92         case VIDIOC_G_FMT:
93         {
94                 static u16 lcr2vbi[] = {
95                         0, V4L2_SLICED_TELETEXT_B, 0,   /* 1 */
96                         0, V4L2_SLICED_WSS_625, 0,      /* 4 */
97                         V4L2_SLICED_CAPTION_525,        /* 6 */
98                         0, 0, V4L2_SLICED_VPS, 0, 0,    /* 9 */
99                         0, 0, 0, 0
100                 };
101                 int is_pal = !(state->std & V4L2_STD_525_60);
102                 int i;
103
104                 fmt = arg;
105                 if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
106                         return -EINVAL;
107                 svbi = &fmt->fmt.sliced;
108                 memset(svbi, 0, sizeof(*svbi));
109                 /* we're done if raw VBI is active */
110                 if ((cx25840_read(client, 0x404) & 0x10) == 0)
111                         break;
112
113                 if (is_pal) {
114                         for (i = 7; i <= 23; i++) {
115                                 u8 v = cx25840_read(client, 0x424 + i - 7);
116
117                                 svbi->service_lines[0][i] = lcr2vbi[v >> 4];
118                                 svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
119                                 svbi->service_set |=
120                                         svbi->service_lines[0][i] | svbi->service_lines[1][i];
121                         }
122                 }
123                 else {
124                         for (i = 10; i <= 21; i++) {
125                                 u8 v = cx25840_read(client, 0x424 + i - 10);
126
127                                 svbi->service_lines[0][i] = lcr2vbi[v >> 4];
128                                 svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
129                                 svbi->service_set |=
130                                         svbi->service_lines[0][i] | svbi->service_lines[1][i];
131                         }
132                 }
133                 break;
134         }
135
136         case VIDIOC_S_FMT:
137         {
138                 int is_pal = !(state->std & V4L2_STD_525_60);
139                 int vbi_offset = is_pal ? 1 : 0;
140                 int i, x;
141                 u8 lcr[24];
142
143                 fmt = arg;
144                 if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE &&
145                     fmt->type != V4L2_BUF_TYPE_VBI_CAPTURE)
146                         return -EINVAL;
147                 svbi = &fmt->fmt.sliced;
148                 if (fmt->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
149                         /* raw VBI */
150                         memset(svbi, 0, sizeof(*svbi));
151
152                         /* Setup standard */
153                         cx25840_std_setup(client);
154
155                         /* VBI Offset */
156                         cx25840_write(client, 0x47f, vbi_offset);
157                         cx25840_write(client, 0x404, 0x2e);
158                         break;
159                 }
160
161                 for (x = 0; x <= 23; x++)
162                         lcr[x] = 0x00;
163
164                 /* Setup standard */
165                 cx25840_std_setup(client);
166
167                 /* Sliced VBI */
168                 cx25840_write(client, 0x404, 0x32);     /* Ancillary data */
169                 cx25840_write(client, 0x406, 0x13);
170                 cx25840_write(client, 0x47f, vbi_offset);
171
172                 if (is_pal) {
173                         for (i = 0; i <= 6; i++)
174                                 svbi->service_lines[0][i] =
175                                         svbi->service_lines[1][i] = 0;
176                 } else {
177                         for (i = 0; i <= 9; i++)
178                                 svbi->service_lines[0][i] =
179                                         svbi->service_lines[1][i] = 0;
180
181                         for (i = 22; i <= 23; i++)
182                                 svbi->service_lines[0][i] =
183                                         svbi->service_lines[1][i] = 0;
184                 }
185
186                 for (i = 7; i <= 23; i++) {
187                         for (x = 0; x <= 1; x++) {
188                                 switch (svbi->service_lines[1-x][i]) {
189                                 case V4L2_SLICED_TELETEXT_B:
190                                         lcr[i] |= 1 << (4 * x);
191                                         break;
192                                 case V4L2_SLICED_WSS_625:
193                                         lcr[i] |= 4 << (4 * x);
194                                         break;
195                                 case V4L2_SLICED_CAPTION_525:
196                                         lcr[i] |= 6 << (4 * x);
197                                         break;
198                                 case V4L2_SLICED_VPS:
199                                         lcr[i] |= 9 << (4 * x);
200                                         break;
201                                 }
202                         }
203                 }
204
205                 if (is_pal) {
206                         for (x = 1, i = 0x424; i <= 0x434; i++, x++) {
207                                 cx25840_write(client, i, lcr[6 + x]);
208                         }
209                 }
210                 else {
211                         for (x = 1, i = 0x424; i <= 0x430; i++, x++) {
212                                 cx25840_write(client, i, lcr[9 + x]);
213                         }
214                         for (i = 0x431; i <= 0x434; i++) {
215                                 cx25840_write(client, i, 0);
216                         }
217                 }
218
219                 cx25840_write(client, 0x43c, 0x16);
220
221                 if (is_pal) {
222                         cx25840_write(client, 0x474, 0x2a);
223                 } else {
224                         cx25840_write(client, 0x474, 0x22);
225                 }
226                 break;
227         }
228
229         case VIDIOC_INT_DECODE_VBI_LINE:
230         {
231                 struct v4l2_decode_vbi_line *vbi = arg;
232                 u8 *p = vbi->p;
233                 int id1, id2, l, err = 0;
234
235                 if (p[0] || p[1] != 0xff || p[2] != 0xff ||
236                     (p[3] != 0x55 && p[3] != 0x91)) {
237                         vbi->line = vbi->type = 0;
238                         break;
239                 }
240
241                 p += 4;
242                 id1 = p[-1];
243                 id2 = p[0] & 0xf;
244                 l = p[2] & 0x3f;
245                 l += state->vbi_line_offset;
246                 p += 4;
247
248                 switch (id2) {
249                 case 1:
250                         id2 = V4L2_SLICED_TELETEXT_B;
251                         break;
252                 case 4:
253                         id2 = V4L2_SLICED_WSS_625;
254                         break;
255                 case 6:
256                         id2 = V4L2_SLICED_CAPTION_525;
257                         err = !odd_parity(p[0]) || !odd_parity(p[1]);
258                         break;
259                 case 9:
260                         id2 = V4L2_SLICED_VPS;
261                         if (decode_vps(p, p) != 0) {
262                                 err = 1;
263                         }
264                         break;
265                 default:
266                         id2 = 0;
267                         err = 1;
268                         break;
269                 }
270
271                 vbi->type = err ? 0 : id2;
272                 vbi->line = err ? 0 : l;
273                 vbi->is_second_field = err ? 0 : (id1 == 0x55);
274                 vbi->p = p;
275                 break;
276         }
277         }
278
279         return 0;
280 }