Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
[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         struct cx25840_state *state = i2c_get_clientdata(client);
88         v4l2_std_id std = state->std;
89         int hblank,hactive,burst,vblank,vactive,sc,vblank656,src_decimation;
90         int luma_lpf,uv_lpf, comb;
91         u32 pll_int,pll_frac,pll_post;
92
93         /* datasheet startup, step 8d */
94         if (std & ~V4L2_STD_NTSC) {
95                 cx25840_write(client, 0x49f, 0x11);
96         } else {
97                 cx25840_write(client, 0x49f, 0x14);
98         }
99
100         if (std & V4L2_STD_625_50) {
101                 hblank=0x084;
102                 hactive=0x2d0;
103                 burst=0x5d;
104                 vblank=0x024;
105                 vactive=0x244;
106                 vblank656=0x28;
107                 src_decimation=0x21f;
108
109                 luma_lpf=2;
110                 if (std & V4L2_STD_SECAM) {
111                         uv_lpf=0;
112                         comb=0;
113                         sc=0x0a425f;
114                 } else if (std == V4L2_STD_PAL_Nc) {
115                         uv_lpf=1;
116                         comb=0x20;
117                         sc=556453;
118                 } else {
119                         uv_lpf=1;
120                         comb=0x20;
121                         sc=0x0a8263;
122                 }
123         } else {
124                 hactive=720;
125                 hblank=122;
126                 vactive=487;
127                 luma_lpf=1;
128                 uv_lpf=1;
129
130                 src_decimation=0x21f;
131                 if (std == V4L2_STD_PAL_60) {
132                         vblank=26;
133                         vblank656=26;
134                         burst=0x5b;
135                         luma_lpf=2;
136                         comb=0x20;
137                         sc=0x0a8263;
138                 } else if (std == V4L2_STD_PAL_M) {
139                         vblank=20;
140                         vblank656=24;
141                         burst=0x61;
142                         comb=0x20;
143
144                         sc=555452;
145                 } else {
146                         vblank=26;
147                         vblank656=26;
148                         burst=0x5b;
149                         comb=0x66;
150                         sc=556063;
151                 }
152         }
153
154         /* DEBUG: Displays configured PLL frequency */
155         pll_int=cx25840_read(client, 0x108);
156         pll_frac=cx25840_read4(client, 0x10c)&0x1ffffff;
157         pll_post=cx25840_read(client, 0x109);
158         v4l_dbg(1, cx25840_debug, client,
159                                 "PLL regs = int: %u, frac: %u, post: %u\n",
160                                 pll_int,pll_frac,pll_post);
161
162         if (pll_post) {
163                 int fin, fsc;
164                 int pll= (28636363L*((((u64)pll_int)<<25L)+pll_frac)) >>25L;
165
166                 pll/=pll_post;
167                 v4l_dbg(1, cx25840_debug, client, "PLL = %d.%06d MHz\n",
168                                                 pll/1000000, pll%1000000);
169                 v4l_dbg(1, cx25840_debug, client, "PLL/8 = %d.%06d MHz\n",
170                                                 pll/8000000, (pll/8)%1000000);
171
172                 fin=((u64)src_decimation*pll)>>12;
173                 v4l_dbg(1, cx25840_debug, client, "ADC Sampling freq = "
174                                                 "%d.%06d MHz\n",
175                                                 fin/1000000,fin%1000000);
176
177                 fsc= (((u64)sc)*pll) >> 24L;
178                 v4l_dbg(1, cx25840_debug, client, "Chroma sub-carrier freq = "
179                                                 "%d.%06d MHz\n",
180                                                 fsc/1000000,fsc%1000000);
181
182                 v4l_dbg(1, cx25840_debug, client, "hblank %i, hactive %i, "
183                         "vblank %i, vactive %i, vblank656 %i, src_dec %i, "
184                         "burst 0x%02x, luma_lpf %i, uv_lpf %i, comb 0x%02x,"
185                         " sc 0x%06x\n",
186                         hblank, hactive, vblank, vactive, vblank656,
187                         src_decimation, burst, luma_lpf, uv_lpf, comb, sc);
188         }
189
190         /* Sets horizontal blanking delay and active lines */
191         cx25840_write(client, 0x470, hblank);
192         cx25840_write(client, 0x471, 0xff&(((hblank>>8)&0x3)|(hactive <<4)));
193         cx25840_write(client, 0x472, hactive>>4);
194
195         /* Sets burst gate delay */
196         cx25840_write(client, 0x473, burst);
197
198         /* Sets vertical blanking delay and active duration */
199         cx25840_write(client, 0x474, vblank);
200         cx25840_write(client, 0x475, 0xff&(((vblank>>8)&0x3)|(vactive <<4)));
201         cx25840_write(client, 0x476, vactive>>4);
202         cx25840_write(client, 0x477, vblank656);
203
204         /* Sets src decimation rate */
205         cx25840_write(client, 0x478, 0xff&src_decimation);
206         cx25840_write(client, 0x479, 0xff&(src_decimation>>8));
207
208         /* Sets Luma and UV Low pass filters */
209         cx25840_write(client, 0x47a, luma_lpf<<6|((uv_lpf<<4)&0x30));
210
211         /* Enables comb filters */
212         cx25840_write(client, 0x47b, comb);
213
214         /* Sets SC Step*/
215         cx25840_write(client, 0x47c, sc);
216         cx25840_write(client, 0x47d, 0xff&sc>>8);
217         cx25840_write(client, 0x47e, 0xff&sc>>16);
218
219         /* Sets VBI parameters */
220         if (std & V4L2_STD_625_50) {
221                 cx25840_write(client, 0x47f, 0x01);
222                 state->vbi_line_offset = 5;
223         } else {
224                 cx25840_write(client, 0x47f, 0x00);
225                 state->vbi_line_offset = 8;
226         }
227 }
228
229 int cx25840_vbi(struct i2c_client *client, unsigned int cmd, void *arg)
230 {
231         struct cx25840_state *state = i2c_get_clientdata(client);
232         struct v4l2_format *fmt;
233         struct v4l2_sliced_vbi_format *svbi;
234
235         switch (cmd) {
236         case VIDIOC_G_FMT:
237         {
238                 static u16 lcr2vbi[] = {
239                         0, V4L2_SLICED_TELETEXT_B, 0,   /* 1 */
240                         0, V4L2_SLICED_WSS_625, 0,      /* 4 */
241                         V4L2_SLICED_CAPTION_525,        /* 6 */
242                         0, 0, V4L2_SLICED_VPS, 0, 0,    /* 9 */
243                         0, 0, 0, 0
244                 };
245                 int is_pal = !(state->std & V4L2_STD_525_60);
246                 int i;
247
248                 fmt = arg;
249                 if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
250                         return -EINVAL;
251                 svbi = &fmt->fmt.sliced;
252                 memset(svbi, 0, sizeof(*svbi));
253                 /* we're done if raw VBI is active */
254                 if ((cx25840_read(client, 0x404) & 0x10) == 0)
255                         break;
256
257                 if (is_pal) {
258                         for (i = 7; i <= 23; i++) {
259                                 u8 v = cx25840_read(client, 0x424 + i - 7);
260
261                                 svbi->service_lines[0][i] = lcr2vbi[v >> 4];
262                                 svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
263                                 svbi->service_set |=
264                                         svbi->service_lines[0][i] | svbi->service_lines[1][i];
265                         }
266                 }
267                 else {
268                         for (i = 10; i <= 21; i++) {
269                                 u8 v = cx25840_read(client, 0x424 + i - 10);
270
271                                 svbi->service_lines[0][i] = lcr2vbi[v >> 4];
272                                 svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
273                                 svbi->service_set |=
274                                         svbi->service_lines[0][i] | svbi->service_lines[1][i];
275                         }
276                 }
277                 break;
278         }
279
280         case VIDIOC_S_FMT:
281         {
282                 int is_pal = !(state->std & V4L2_STD_525_60);
283                 int vbi_offset = is_pal ? 1 : 0;
284                 int i, x;
285                 u8 lcr[24];
286
287                 fmt = arg;
288                 if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
289                         return -EINVAL;
290                 svbi = &fmt->fmt.sliced;
291                 if (svbi->service_set == 0) {
292                         /* raw VBI */
293                         memset(svbi, 0, sizeof(*svbi));
294
295                         /* Setup VBI */
296                         cx25840_vbi_setup(client);
297
298                         /* VBI Offset */
299                         cx25840_write(client, 0x47f, vbi_offset);
300                         cx25840_write(client, 0x404, 0x2e);
301                         break;
302                 }
303
304                 for (x = 0; x <= 23; x++)
305                         lcr[x] = 0x00;
306
307                 /* Setup VBI */
308                 cx25840_vbi_setup(client);
309
310                 /* Sliced VBI */
311                 cx25840_write(client, 0x404, 0x32);     /* Ancillary data */
312                 cx25840_write(client, 0x406, 0x13);
313                 cx25840_write(client, 0x47f, vbi_offset);
314
315                 if (is_pal) {
316                         for (i = 0; i <= 6; i++)
317                                 svbi->service_lines[0][i] =
318                                         svbi->service_lines[1][i] = 0;
319                 } else {
320                         for (i = 0; i <= 9; i++)
321                                 svbi->service_lines[0][i] =
322                                         svbi->service_lines[1][i] = 0;
323
324                         for (i = 22; i <= 23; i++)
325                                 svbi->service_lines[0][i] =
326                                         svbi->service_lines[1][i] = 0;
327                 }
328
329                 for (i = 7; i <= 23; i++) {
330                         for (x = 0; x <= 1; x++) {
331                                 switch (svbi->service_lines[1-x][i]) {
332                                 case V4L2_SLICED_TELETEXT_B:
333                                         lcr[i] |= 1 << (4 * x);
334                                         break;
335                                 case V4L2_SLICED_WSS_625:
336                                         lcr[i] |= 4 << (4 * x);
337                                         break;
338                                 case V4L2_SLICED_CAPTION_525:
339                                         lcr[i] |= 6 << (4 * x);
340                                         break;
341                                 case V4L2_SLICED_VPS:
342                                         lcr[i] |= 9 << (4 * x);
343                                         break;
344                                 }
345                         }
346                 }
347
348                 if (is_pal) {
349                         for (x = 1, i = 0x424; i <= 0x434; i++, x++) {
350                                 cx25840_write(client, i, lcr[6 + x]);
351                         }
352                 }
353                 else {
354                         for (x = 1, i = 0x424; i <= 0x430; i++, x++) {
355                                 cx25840_write(client, i, lcr[9 + x]);
356                         }
357                         for (i = 0x431; i <= 0x434; i++) {
358                                 cx25840_write(client, i, 0);
359                         }
360                 }
361
362                 cx25840_write(client, 0x43c, 0x16);
363
364                 if (is_pal) {
365                         cx25840_write(client, 0x474, 0x2a);
366                 } else {
367                         cx25840_write(client, 0x474, 0x22);
368                 }
369                 break;
370         }
371
372         case VIDIOC_INT_DECODE_VBI_LINE:
373         {
374                 struct v4l2_decode_vbi_line *vbi = arg;
375                 u8 *p = vbi->p;
376                 int id1, id2, l, err = 0;
377
378                 if (p[0] || p[1] != 0xff || p[2] != 0xff ||
379                     (p[3] != 0x55 && p[3] != 0x91)) {
380                         vbi->line = vbi->type = 0;
381                         break;
382                 }
383
384                 p += 4;
385                 id1 = p[-1];
386                 id2 = p[0] & 0xf;
387                 l = p[2] & 0x3f;
388                 l += state->vbi_line_offset;
389                 p += 4;
390
391                 switch (id2) {
392                 case 1:
393                         id2 = V4L2_SLICED_TELETEXT_B;
394                         break;
395                 case 4:
396                         id2 = V4L2_SLICED_WSS_625;
397                         break;
398                 case 6:
399                         id2 = V4L2_SLICED_CAPTION_525;
400                         err = !odd_parity(p[0]) || !odd_parity(p[1]);
401                         break;
402                 case 9:
403                         id2 = V4L2_SLICED_VPS;
404                         if (decode_vps(p, p) != 0) {
405                                 err = 1;
406                         }
407                         break;
408                 default:
409                         id2 = 0;
410                         err = 1;
411                         break;
412                 }
413
414                 vbi->type = err ? 0 : id2;
415                 vbi->line = err ? 0 : l;
416                 vbi->is_second_field = err ? 0 : (id1 == 0x55);
417                 vbi->p = p;
418                 break;
419         }
420         }
421
422         return 0;
423 }