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V4L/DVB (6715): ivtv: Remove unnecessary register update
[linux-2.6/verdex.git] / drivers / media / video / cx25840 / cx25840-vbi.c
blob6828f59b9d83555dee36e0e7a11656f8a6cfbe92
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 = cx25840_get_v4lstd(client);
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 = !(cx25840_get_v4lstd(client) & 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 = !(cx25840_get_v4lstd(client) & 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 }
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