Merge branch 'for-2.6.26' of git://git.farnsworth.org/dale/linux-2.6-mv643xx_eth...
[linux-2.6] / drivers / media / video / cx18 / cx18-av-vbi.c
1 /*
2  *  cx18 ADEC VBI functions
3  *
4  *  Derived from cx25840-vbi.c
5  *
6  *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
7  *
8  *  This program is free software; you can redistribute it and/or
9  *  modify it under the terms of the GNU General Public License
10  *  as published by the Free Software Foundation; either version 2
11  *  of the License, or (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., 51 Franklin Street, Fifth Floor, Boston, MA
21  *  02110-1301, USA.
22  */
23
24
25 #include "cx18-driver.h"
26
27 static int odd_parity(u8 c)
28 {
29         c ^= (c >> 4);
30         c ^= (c >> 2);
31         c ^= (c >> 1);
32
33         return c & 1;
34 }
35
36 static int decode_vps(u8 *dst, u8 *p)
37 {
38         static const u8 biphase_tbl[] = {
39                 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
40                 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
41                 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96,
42                 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2,
43                 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94,
44                 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0,
45                 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
46                 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
47                 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5,
48                 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1,
49                 0xc3, 0x4b, 0x43, 0xc3, 0x87, 0x0f, 0x07, 0x87,
50                 0x83, 0x0b, 0x03, 0x83, 0xc3, 0x4b, 0x43, 0xc3,
51                 0xc1, 0x49, 0x41, 0xc1, 0x85, 0x0d, 0x05, 0x85,
52                 0x81, 0x09, 0x01, 0x81, 0xc1, 0x49, 0x41, 0xc1,
53                 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5,
54                 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1,
55                 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4,
56                 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0,
57                 0xc2, 0x4a, 0x42, 0xc2, 0x86, 0x0e, 0x06, 0x86,
58                 0x82, 0x0a, 0x02, 0x82, 0xc2, 0x4a, 0x42, 0xc2,
59                 0xc0, 0x48, 0x40, 0xc0, 0x84, 0x0c, 0x04, 0x84,
60                 0x80, 0x08, 0x00, 0x80, 0xc0, 0x48, 0x40, 0xc0,
61                 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4,
62                 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0,
63                 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
64                 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
65                 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96,
66                 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2,
67                 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94,
68                 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0,
69                 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
70                 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
71         };
72
73         u8 c, err = 0;
74         int i;
75
76         for (i = 0; i < 2 * 13; i += 2) {
77                 err |= biphase_tbl[p[i]] | biphase_tbl[p[i + 1]];
78                 c = (biphase_tbl[p[i + 1]] & 0xf) |
79                     ((biphase_tbl[p[i]] & 0xf) << 4);
80                 dst[i / 2] = c;
81         }
82
83         return err & 0xf0;
84 }
85
86 void cx18_av_vbi_setup(struct cx18 *cx)
87 {
88         struct cx18_av_state *state = &cx->av_state;
89         v4l2_std_id std = state->std;
90         int hblank, hactive, burst, vblank, vactive, sc;
91         int vblank656, src_decimation;
92         int luma_lpf, uv_lpf, comb;
93         u32 pll_int, pll_frac, pll_post;
94
95         /* datasheet startup, step 8d */
96         if (std & ~V4L2_STD_NTSC)
97                 cx18_av_write(cx, 0x49f, 0x11);
98         else
99                 cx18_av_write(cx, 0x49f, 0x14);
100
101         if (std & V4L2_STD_625_50) {
102                 hblank = 0x084;
103                 hactive = 0x2d0;
104                 burst = 0x5d;
105                 vblank = 0x024;
106                 vactive = 0x244;
107                 vblank656 = 0x28;
108                 src_decimation = 0x21f;
109
110                 luma_lpf = 2;
111                 if (std & V4L2_STD_SECAM) {
112                         uv_lpf = 0;
113                         comb = 0;
114                         sc = 0x0a425f;
115                 } else if (std == V4L2_STD_PAL_Nc) {
116                         uv_lpf = 1;
117                         comb = 0x20;
118                         sc = 556453;
119                 } else {
120                         uv_lpf = 1;
121                         comb = 0x20;
122                         sc = 0x0a8263;
123                 }
124         } else {
125                 hactive = 720;
126                 hblank = 122;
127                 vactive = 487;
128                 luma_lpf = 1;
129                 uv_lpf = 1;
130
131                 src_decimation = 0x21f;
132                 if (std == V4L2_STD_PAL_60) {
133                         vblank = 26;
134                         vblank656 = 26;
135                         burst = 0x5b;
136                         luma_lpf = 2;
137                         comb = 0x20;
138                         sc = 0x0a8263;
139                 } else if (std == V4L2_STD_PAL_M) {
140                         vblank = 20;
141                         vblank656 = 24;
142                         burst = 0x61;
143                         comb = 0x20;
144
145                         sc = 555452;
146                 } else {
147                         vblank = 26;
148                         vblank656 = 26;
149                         burst = 0x5b;
150                         comb = 0x66;
151                         sc = 556063;
152                 }
153         }
154
155         /* DEBUG: Displays configured PLL frequency */
156         pll_int = cx18_av_read(cx, 0x108);
157         pll_frac = cx18_av_read4(cx, 0x10c) & 0x1ffffff;
158         pll_post = cx18_av_read(cx, 0x109);
159         CX18_DEBUG_INFO("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) << 25) + pll_frac);
165
166                 pll >>= 25;
167                 pll /= pll_post;
168                 CX18_DEBUG_INFO("PLL = %d.%06d MHz\n",
169                                         pll / 1000000, pll % 1000000);
170                 CX18_DEBUG_INFO("PLL/8 = %d.%06d MHz\n",
171                                         pll / 8000000, (pll / 8) % 1000000);
172
173                 fin = ((u64)src_decimation * pll) >> 12;
174                 CX18_DEBUG_INFO("ADC Sampling freq = %d.%06d MHz\n",
175                                         fin / 1000000, fin % 1000000);
176
177                 fsc = (((u64)sc) * pll) >> 24L;
178                 CX18_DEBUG_INFO("Chroma sub-carrier freq = %d.%06d MHz\n",
179                                         fsc / 1000000, fsc % 1000000);
180
181                 CX18_DEBUG_INFO("hblank %i, hactive %i, "
182                         "vblank %i , vactive %i, vblank656 %i, src_dec %i,"
183                         "burst 0x%02x, luma_lpf %i, uv_lpf %i, comb 0x%02x,"
184                         " sc 0x%06x\n",
185                         hblank, hactive, vblank, vactive, vblank656,
186                         src_decimation, burst, luma_lpf, uv_lpf, comb, sc);
187         }
188
189         /* Sets horizontal blanking delay and active lines */
190         cx18_av_write(cx, 0x470, hblank);
191         cx18_av_write(cx, 0x471, 0xff & (((hblank >> 8) & 0x3) |
192                                                 (hactive << 4)));
193         cx18_av_write(cx, 0x472, hactive >> 4);
194
195         /* Sets burst gate delay */
196         cx18_av_write(cx, 0x473, burst);
197
198         /* Sets vertical blanking delay and active duration */
199         cx18_av_write(cx, 0x474, vblank);
200         cx18_av_write(cx, 0x475, 0xff & (((vblank >> 8) & 0x3) |
201                                                 (vactive << 4)));
202         cx18_av_write(cx, 0x476, vactive >> 4);
203         cx18_av_write(cx, 0x477, vblank656);
204
205         /* Sets src decimation rate */
206         cx18_av_write(cx, 0x478, 0xff & src_decimation);
207         cx18_av_write(cx, 0x479, 0xff & (src_decimation >> 8));
208
209         /* Sets Luma and UV Low pass filters */
210         cx18_av_write(cx, 0x47a, luma_lpf << 6 | ((uv_lpf << 4) & 0x30));
211
212         /* Enables comb filters */
213         cx18_av_write(cx, 0x47b, comb);
214
215         /* Sets SC Step*/
216         cx18_av_write(cx, 0x47c, sc);
217         cx18_av_write(cx, 0x47d, 0xff & sc >> 8);
218         cx18_av_write(cx, 0x47e, 0xff & sc >> 16);
219
220         /* Sets VBI parameters */
221         if (std & V4L2_STD_625_50) {
222                 cx18_av_write(cx, 0x47f, 0x01);
223                 state->vbi_line_offset = 5;
224         } else {
225                 cx18_av_write(cx, 0x47f, 0x00);
226                 state->vbi_line_offset = 8;
227         }
228 }
229
230 int cx18_av_vbi(struct cx18 *cx, unsigned int cmd, void *arg)
231 {
232         struct cx18_av_state *state = &cx->av_state;
233         struct v4l2_format *fmt;
234         struct v4l2_sliced_vbi_format *svbi;
235
236         switch (cmd) {
237         case VIDIOC_G_FMT:
238         {
239                 static u16 lcr2vbi[] = {
240                         0, V4L2_SLICED_TELETEXT_B, 0,   /* 1 */
241                         0, V4L2_SLICED_WSS_625, 0,      /* 4 */
242                         V4L2_SLICED_CAPTION_525,        /* 6 */
243                         0, 0, V4L2_SLICED_VPS, 0, 0,    /* 9 */
244                         0, 0, 0, 0
245                 };
246                 int is_pal = !(state->std & V4L2_STD_525_60);
247                 int i;
248
249                 fmt = arg;
250                 if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
251                         return -EINVAL;
252                 svbi = &fmt->fmt.sliced;
253                 memset(svbi, 0, sizeof(*svbi));
254                 /* we're done if raw VBI is active */
255                 if ((cx18_av_read(cx, 0x404) & 0x10) == 0)
256                         break;
257
258                 if (is_pal) {
259                         for (i = 7; i <= 23; i++) {
260                                 u8 v = cx18_av_read(cx, 0x424 + i - 7);
261
262                                 svbi->service_lines[0][i] = lcr2vbi[v >> 4];
263                                 svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
264                                 svbi->service_set |= svbi->service_lines[0][i] |
265                                         svbi->service_lines[1][i];
266                         }
267                 } else {
268                         for (i = 10; i <= 21; i++) {
269                                 u8 v = cx18_av_read(cx, 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 |= svbi->service_lines[0][i] |
274                                         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                         cx18_av_vbi_setup(cx);
297
298                         /* VBI Offset */
299                         cx18_av_write(cx, 0x47f, vbi_offset);
300                         cx18_av_write(cx, 0x404, 0x2e);
301                         break;
302                 }
303
304                 for (x = 0; x <= 23; x++)
305                         lcr[x] = 0x00;
306
307                 /* Setup VBI */
308                 cx18_av_vbi_setup(cx);
309
310                 /* Sliced VBI */
311                 cx18_av_write(cx, 0x404, 0x32); /* Ancillary data */
312                 cx18_av_write(cx, 0x406, 0x13);
313                 cx18_av_write(cx, 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                                 cx18_av_write(cx, i, lcr[6 + x]);
351                 } else {
352                         for (x = 1, i = 0x424; i <= 0x430; i++, x++)
353                                 cx18_av_write(cx, i, lcr[9 + x]);
354                         for (i = 0x431; i <= 0x434; i++)
355                                 cx18_av_write(cx, i, 0);
356                 }
357
358                 cx18_av_write(cx, 0x43c, 0x16);
359                 cx18_av_write(cx, 0x474, is_pal ? 0x2a : 0x22);
360                 break;
361         }
362
363         case VIDIOC_INT_DECODE_VBI_LINE:
364         {
365                 struct v4l2_decode_vbi_line *vbi = arg;
366                 u8 *p = vbi->p;
367                 int id1, id2, l, err = 0;
368
369                 if (p[0] || p[1] != 0xff || p[2] != 0xff ||
370                     (p[3] != 0x55 && p[3] != 0x91)) {
371                         vbi->line = vbi->type = 0;
372                         break;
373                 }
374
375                 p += 4;
376                 id1 = p[-1];
377                 id2 = p[0] & 0xf;
378                 l = p[2] & 0x3f;
379                 l += state->vbi_line_offset;
380                 p += 4;
381
382                 switch (id2) {
383                 case 1:
384                         id2 = V4L2_SLICED_TELETEXT_B;
385                         break;
386                 case 4:
387                         id2 = V4L2_SLICED_WSS_625;
388                         break;
389                 case 6:
390                         id2 = V4L2_SLICED_CAPTION_525;
391                         err = !odd_parity(p[0]) || !odd_parity(p[1]);
392                         break;
393                 case 9:
394                         id2 = V4L2_SLICED_VPS;
395                         if (decode_vps(p, p) != 0)
396                                 err = 1;
397                         break;
398                 default:
399                         id2 = 0;
400                         err = 1;
401                         break;
402                 }
403
404                 vbi->type = err ? 0 : id2;
405                 vbi->line = err ? 0 : l;
406                 vbi->is_second_field = err ? 0 : (id1 == 0x55);
407                 vbi->p = p;
408                 break;
409         }
410         }
411
412         return 0;
413 }