2 * cx18 ADEC VBI functions
4 * Derived from cx25840-vbi.c
6 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
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.
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.
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
25 #include "cx18-driver.h"
27 static int odd_parity(u8 c)
36 static int decode_vps(u8 *dst, u8 *p)
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,
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);
86 void cx18_av_vbi_setup(struct cx18 *cx)
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;
95 /* datasheet startup, step 8d */
96 if (std & ~V4L2_STD_NTSC)
97 cx18_av_write(cx, 0x49f, 0x11);
99 cx18_av_write(cx, 0x49f, 0x14);
101 if (std & V4L2_STD_625_50) {
108 src_decimation = 0x21f;
111 if (std & V4L2_STD_PAL) {
115 } else if (std == V4L2_STD_PAL_Nc) {
133 src_decimation = 0x21f;
134 if (std == V4L2_STD_PAL_60) {
139 } else if (std == V4L2_STD_PAL_M) {
150 /* DEBUG: Displays configured PLL frequency */
151 pll_int = cx18_av_read(cx, 0x108);
152 pll_frac = cx18_av_read4(cx, 0x10c) & 0x1ffffff;
153 pll_post = cx18_av_read(cx, 0x109);
154 CX18_DEBUG_INFO("PLL regs = int: %u, frac: %u, post: %u\n",
155 pll_int, pll_frac, pll_post);
159 int pll = 28636363L * ((((u64)pll_int) << 25) + pll_frac);
163 CX18_DEBUG_INFO("PLL = %d.%06d MHz\n",
164 pll / 1000000, pll % 1000000);
165 CX18_DEBUG_INFO("PLL/8 = %d.%06d MHz\n",
166 pll / 8000000, (pll / 8) % 1000000);
168 fin = ((u64)src_decimation * pll) >> 12;
169 CX18_DEBUG_INFO("ADC Sampling freq = %d.%06d MHz\n",
170 fin / 1000000, fin % 1000000);
172 fsc = (((u64)sc) * pll) >> 24L;
173 CX18_DEBUG_INFO("Chroma sub-carrier freq = %d.%06d MHz\n",
174 fsc / 1000000, fsc % 1000000);
176 CX18_DEBUG_INFO("hblank %i, hactive %i, "
177 "vblank %i , vactive %i, vblank656 %i, src_dec %i,"
178 "burst 0x%02x, luma_lpf %i, uv_lpf %i, comb 0x%02x,"
180 hblank, hactive, vblank, vactive, vblank656,
181 src_decimation, burst, luma_lpf, uv_lpf, comb, sc);
184 /* Sets horizontal blanking delay and active lines */
185 cx18_av_write(cx, 0x470, hblank);
186 cx18_av_write(cx, 0x471, 0xff & (((hblank >> 8) & 0x3) |
188 cx18_av_write(cx, 0x472, hactive >> 4);
190 /* Sets burst gate delay */
191 cx18_av_write(cx, 0x473, burst);
193 /* Sets vertical blanking delay and active duration */
194 cx18_av_write(cx, 0x474, vblank);
195 cx18_av_write(cx, 0x475, 0xff & (((vblank >> 8) & 0x3) |
197 cx18_av_write(cx, 0x476, vactive >> 4);
198 cx18_av_write(cx, 0x477, vblank656);
200 /* Sets src decimation rate */
201 cx18_av_write(cx, 0x478, 0xff & src_decimation);
202 cx18_av_write(cx, 0x479, 0xff & (src_decimation >> 8));
204 /* Sets Luma and UV Low pass filters */
205 cx18_av_write(cx, 0x47a, luma_lpf << 6 | ((uv_lpf << 4) & 0x30));
207 /* Enables comb filters */
208 cx18_av_write(cx, 0x47b, comb);
211 cx18_av_write(cx, 0x47c, sc);
212 cx18_av_write(cx, 0x47d, 0xff & sc >> 8);
213 cx18_av_write(cx, 0x47e, 0xff & sc >> 16);
215 /* Sets VBI parameters */
216 if (std & V4L2_STD_625_50) {
217 cx18_av_write(cx, 0x47f, 0x01);
218 state->vbi_line_offset = 5;
220 cx18_av_write(cx, 0x47f, 0x00);
221 state->vbi_line_offset = 8;
225 int cx18_av_vbi(struct cx18 *cx, unsigned int cmd, void *arg)
227 struct cx18_av_state *state = &cx->av_state;
228 struct v4l2_format *fmt;
229 struct v4l2_sliced_vbi_format *svbi;
234 static u16 lcr2vbi[] = {
235 0, V4L2_SLICED_TELETEXT_B, 0, /* 1 */
236 0, V4L2_SLICED_WSS_625, 0, /* 4 */
237 V4L2_SLICED_CAPTION_525, /* 6 */
238 0, 0, V4L2_SLICED_VPS, 0, 0, /* 9 */
241 int is_pal = !(state->std & V4L2_STD_525_60);
245 if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
247 svbi = &fmt->fmt.sliced;
248 memset(svbi, 0, sizeof(*svbi));
249 /* we're done if raw VBI is active */
250 if ((cx18_av_read(cx, 0x404) & 0x10) == 0)
254 for (i = 7; i <= 23; i++) {
255 u8 v = cx18_av_read(cx, 0x424 + i - 7);
257 svbi->service_lines[0][i] = lcr2vbi[v >> 4];
258 svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
259 svbi->service_set |= svbi->service_lines[0][i] |
260 svbi->service_lines[1][i];
263 for (i = 10; i <= 21; i++) {
264 u8 v = cx18_av_read(cx, 0x424 + i - 10);
266 svbi->service_lines[0][i] = lcr2vbi[v >> 4];
267 svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
268 svbi->service_set |= svbi->service_lines[0][i] |
269 svbi->service_lines[1][i];
277 int is_pal = !(state->std & V4L2_STD_525_60);
278 int vbi_offset = is_pal ? 1 : 0;
283 if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
285 svbi = &fmt->fmt.sliced;
286 if (svbi->service_set == 0) {
288 memset(svbi, 0, sizeof(*svbi));
291 cx18_av_vbi_setup(cx);
294 cx18_av_write(cx, 0x47f, vbi_offset);
295 cx18_av_write(cx, 0x404, 0x2e);
299 for (x = 0; x <= 23; x++)
303 cx18_av_vbi_setup(cx);
306 cx18_av_write(cx, 0x404, 0x32); /* Ancillary data */
307 cx18_av_write(cx, 0x406, 0x13);
308 cx18_av_write(cx, 0x47f, vbi_offset);
311 for (i = 0; i <= 6; i++)
312 svbi->service_lines[0][i] =
313 svbi->service_lines[1][i] = 0;
315 for (i = 0; i <= 9; i++)
316 svbi->service_lines[0][i] =
317 svbi->service_lines[1][i] = 0;
319 for (i = 22; i <= 23; i++)
320 svbi->service_lines[0][i] =
321 svbi->service_lines[1][i] = 0;
324 for (i = 7; i <= 23; i++) {
325 for (x = 0; x <= 1; x++) {
326 switch (svbi->service_lines[1-x][i]) {
327 case V4L2_SLICED_TELETEXT_B:
328 lcr[i] |= 1 << (4 * x);
330 case V4L2_SLICED_WSS_625:
331 lcr[i] |= 4 << (4 * x);
333 case V4L2_SLICED_CAPTION_525:
334 lcr[i] |= 6 << (4 * x);
336 case V4L2_SLICED_VPS:
337 lcr[i] |= 9 << (4 * x);
344 for (x = 1, i = 0x424; i <= 0x434; i++, x++)
345 cx18_av_write(cx, i, lcr[6 + x]);
347 for (x = 1, i = 0x424; i <= 0x430; i++, x++)
348 cx18_av_write(cx, i, lcr[9 + x]);
349 for (i = 0x431; i <= 0x434; i++)
350 cx18_av_write(cx, i, 0);
353 cx18_av_write(cx, 0x43c, 0x16);
354 cx18_av_write(cx, 0x474, is_pal ? 0x2a : 0x22);
358 case VIDIOC_INT_DECODE_VBI_LINE:
360 struct v4l2_decode_vbi_line *vbi = arg;
362 int id1, id2, l, err = 0;
364 if (p[0] || p[1] != 0xff || p[2] != 0xff ||
365 (p[3] != 0x55 && p[3] != 0x91)) {
366 vbi->line = vbi->type = 0;
374 l += state->vbi_line_offset;
379 id2 = V4L2_SLICED_TELETEXT_B;
382 id2 = V4L2_SLICED_WSS_625;
385 id2 = V4L2_SLICED_CAPTION_525;
386 err = !odd_parity(p[0]) || !odd_parity(p[1]);
389 id2 = V4L2_SLICED_VPS;
390 if (decode_vps(p, p) != 0)
399 vbi->type = err ? 0 : id2;
400 vbi->line = err ? 0 : l;
401 vbi->is_second_field = err ? 0 : (id1 == 0x55);