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Diffstat (limited to 'drivers/media/video/cx18/cx18-av-vbi.c')
-rw-r--r--drivers/media/video/cx18/cx18-av-vbi.c413
1 files changed, 413 insertions, 0 deletions
diff --git a/drivers/media/video/cx18/cx18-av-vbi.c b/drivers/media/video/cx18/cx18-av-vbi.c
new file mode 100644
index 000000000000..d09f1daf4ebf
--- /dev/null
+++ b/drivers/media/video/cx18/cx18-av-vbi.c
@@ -0,0 +1,413 @@
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
27static 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
36static 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
86void 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
230int 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}
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-10 10:58:39 -0500