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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / drivers / media / common / saa7146_hlp.c
blob9c905399a233028ba9872cc503efa1f6ef8b699f
1 #include <linux/kernel.h>
2 #include <media/saa7146_vv.h>
3
4 static void calculate_output_format_register(struct saa7146_dev* saa, u32 palette, u32* clip_format)
5 {
6 /* clear out the necessary bits */
7 *clip_format &= 0x0000ffff;
8 /* set these bits new */
9 *clip_format |= (( ((palette&0xf00)>>8) << 30) | ((palette&0x00f) << 24) | (((palette&0x0f0)>>4) << 16));
10 }
11
12 static void calculate_hps_source_and_sync(struct saa7146_dev *dev, int source, int sync, u32* hps_ctrl)
13 {
14 *hps_ctrl &= ~(MASK_30 | MASK_31 | MASK_28);
15 *hps_ctrl |= (source << 30) | (sync << 28);
16 }
17
18 static void calculate_hxo_and_hyo(struct saa7146_vv *vv, u32* hps_h_scale, u32* hps_ctrl)
19 {
20 int hyo = 0, hxo = 0;
21
22 hyo = vv->standard->v_offset;
23 hxo = vv->standard->h_offset;
24
25 *hps_h_scale &= ~(MASK_B0 | 0xf00);
26 *hps_h_scale |= (hxo << 0);
27
28 *hps_ctrl &= ~(MASK_W0 | MASK_B2);
29 *hps_ctrl |= (hyo << 12);
30 }
31
32 /* helper functions for the calculation of the horizontal- and vertical
33 scaling registers, clip-format-register etc ...
34 these functions take pointers to the (most-likely read-out
35 original-values) and manipulate them according to the requested
36 changes.
37 */
38
39 /* hps_coeff used for CXY and CXUV; scale 1/1 -> scale 1/64 */
40 static struct {
41 u16 hps_coeff;
42 u16 weight_sum;
43 } hps_h_coeff_tab [] = {
44 {0x00, 2}, {0x02, 4}, {0x00, 4}, {0x06, 8}, {0x02, 8},
45 {0x08, 8}, {0x00, 8}, {0x1E, 16}, {0x0E, 8}, {0x26, 8},
46 {0x06, 8}, {0x42, 8}, {0x02, 8}, {0x80, 8}, {0x00, 8},
47 {0xFE, 16}, {0xFE, 8}, {0x7E, 8}, {0x7E, 8}, {0x3E, 8},
48 {0x3E, 8}, {0x1E, 8}, {0x1E, 8}, {0x0E, 8}, {0x0E, 8},
49 {0x06, 8}, {0x06, 8}, {0x02, 8}, {0x02, 8}, {0x00, 8},
50 {0x00, 8}, {0xFE, 16}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8},
51 {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8},
52 {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8},
53 {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0xFE, 8}, {0x7E, 8},
54 {0x7E, 8}, {0x3E, 8}, {0x3E, 8}, {0x1E, 8}, {0x1E, 8},
55 {0x0E, 8}, {0x0E, 8}, {0x06, 8}, {0x06, 8}, {0x02, 8},
56 {0x02, 8}, {0x00, 8}, {0x00, 8}, {0xFE, 16}
57 };
58
59 /* table of attenuation values for horizontal scaling */
60 static u8 h_attenuation[] = { 1, 2, 4, 8, 2, 4, 8, 16, 0};
61
62 /* calculate horizontal scale registers */
63 static int calculate_h_scale_registers(struct saa7146_dev *dev,
64 int in_x, int out_x, int flip_lr,
65 u32* hps_ctrl, u32* hps_v_gain, u32* hps_h_prescale, u32* hps_h_scale)
66 {
67 /* horizontal prescaler */
68 u32 dcgx = 0, xpsc = 0, xacm = 0, cxy = 0, cxuv = 0;
69 /* horizontal scaler */
70 u32 xim = 0, xp = 0, xsci =0;
71 /* vertical scale & gain */
72 u32 pfuv = 0;
73
74 /* helper variables */
75 u32 h_atten = 0, i = 0;
76
77 if ( 0 == out_x ) {
78 return -EINVAL;
79 }
80
81 /* mask out vanity-bit */
82 *hps_ctrl &= ~MASK_29;
83
84 /* calculate prescale-(xspc)-value: [n .. 1/2) : 1
85 [1/2 .. 1/3) : 2
86 [1/3 .. 1/4) : 3
87 ... */
88 if (in_x > out_x) {
89 xpsc = in_x / out_x;
90 }
91 else {
92 /* zooming */
93 xpsc = 1;
94 }
95
96 /* if flip_lr-bit is set, number of pixels after
97 horizontal prescaling must be < 384 */
98 if ( 0 != flip_lr ) {
99
100 /* set vanity bit */
101 *hps_ctrl |= MASK_29;
102
103 while (in_x / xpsc >= 384 )
104 xpsc++;
105 }
106 /* if zooming is wanted, number of pixels after
107 horizontal prescaling must be < 768 */
108 else {
109 while ( in_x / xpsc >= 768 )
110 xpsc++;
111 }
112
113 /* maximum prescale is 64 (p.69) */
114 if ( xpsc > 64 )
115 xpsc = 64;
116
117 /* keep xacm clear*/
118 xacm = 0;
119
120 /* set horizontal filter parameters (CXY = CXUV) */
121 cxy = hps_h_coeff_tab[( (xpsc - 1) < 63 ? (xpsc - 1) : 63 )].hps_coeff;
122 cxuv = cxy;
123
124 /* calculate and set horizontal fine scale (xsci) */
125
126 /* bypass the horizontal scaler ? */
127 if ( (in_x == out_x) && ( 1 == xpsc ) )
128 xsci = 0x400;
129 else
130 xsci = ( (1024 * in_x) / (out_x * xpsc) ) + xpsc;
131
132 /* set start phase for horizontal fine scale (xp) to 0 */
133 xp = 0;
134
135 /* set xim, if we bypass the horizontal scaler */
136 if ( 0x400 == xsci )
137 xim = 1;
138 else
139 xim = 0;
140
141 /* if the prescaler is bypassed, enable horizontal
142 accumulation mode (xacm) and clear dcgx */
143 if( 1 == xpsc ) {
144 xacm = 1;
145 dcgx = 0;
146 } else {
147 xacm = 0;
148 /* get best match in the table of attenuations
149 for horizontal scaling */
150 h_atten = hps_h_coeff_tab[( (xpsc - 1) < 63 ? (xpsc - 1) : 63 )].weight_sum;
151
152 for (i = 0; h_attenuation[i] != 0; i++) {
153 if (h_attenuation[i] >= h_atten)
154 break;
155 }
156
157 dcgx = i;
158 }
159
160 /* the horizontal scaling increment controls the UV filter
161 to reduce the bandwidth to improve the display quality,
162 so set it ... */
163 if ( xsci == 0x400)
164 pfuv = 0x00;
165 else if ( xsci < 0x600)
166 pfuv = 0x01;
167 else if ( xsci < 0x680)
168 pfuv = 0x11;
169 else if ( xsci < 0x700)
170 pfuv = 0x22;
171 else
172 pfuv = 0x33;
173
174
175 *hps_v_gain &= MASK_W0|MASK_B2;
176 *hps_v_gain |= (pfuv << 24);
177
178 *hps_h_scale &= ~(MASK_W1 | 0xf000);
179 *hps_h_scale |= (xim << 31) | (xp << 24) | (xsci << 12);
180
181 *hps_h_prescale |= (dcgx << 27) | ((xpsc-1) << 18) | (xacm << 17) | (cxy << 8) | (cxuv << 0);
182
183 return 0;
184 }
185
186 static struct {
187 u16 hps_coeff;
188 u16 weight_sum;
189 } hps_v_coeff_tab [] = {
190 {0x0100, 2}, {0x0102, 4}, {0x0300, 4}, {0x0106, 8}, {0x0502, 8},
191 {0x0708, 8}, {0x0F00, 8}, {0x011E, 16}, {0x110E, 16}, {0x1926, 16},
192 {0x3906, 16}, {0x3D42, 16}, {0x7D02, 16}, {0x7F80, 16}, {0xFF00, 16},
193 {0x01FE, 32}, {0x01FE, 32}, {0x817E, 32}, {0x817E, 32}, {0xC13E, 32},
194 {0xC13E, 32}, {0xE11E, 32}, {0xE11E, 32}, {0xF10E, 32}, {0xF10E, 32},
195 {0xF906, 32}, {0xF906, 32}, {0xFD02, 32}, {0xFD02, 32}, {0xFF00, 32},
196 {0xFF00, 32}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64},
197 {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64},
198 {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64},
199 {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x01FE, 64}, {0x817E, 64},
200 {0x817E, 64}, {0xC13E, 64}, {0xC13E, 64}, {0xE11E, 64}, {0xE11E, 64},
201 {0xF10E, 64}, {0xF10E, 64}, {0xF906, 64}, {0xF906, 64}, {0xFD02, 64},
202 {0xFD02, 64}, {0xFF00, 64}, {0xFF00, 64}, {0x01FE, 128}
203 };
204
205 /* table of attenuation values for vertical scaling */
206 static u16 v_attenuation[] = { 2, 4, 8, 16, 32, 64, 128, 256, 0};
207
208 /* calculate vertical scale registers */
209 static int calculate_v_scale_registers(struct saa7146_dev *dev, enum v4l2_field field,
210 int in_y, int out_y, u32* hps_v_scale, u32* hps_v_gain)
211 {
212 int lpi = 0;
213
214 /* vertical scaling */
215 u32 yacm = 0, ysci = 0, yacl = 0, ypo = 0, ype = 0;
216 /* vertical scale & gain */
217 u32 dcgy = 0, cya_cyb = 0;
218
219 /* helper variables */
220 u32 v_atten = 0, i = 0;
221
222 /* error, if vertical zooming */
223 if ( in_y < out_y ) {
224 return -EINVAL;
225 }
226
227 /* linear phase interpolation may be used
228 if scaling is between 1 and 1/2 (both fields used)
229 or scaling is between 1/2 and 1/4 (if only one field is used) */
230
231 if (V4L2_FIELD_HAS_BOTH(field)) {
232 if( 2*out_y >= in_y) {
233 lpi = 1;
234 }
235 } else if (field == V4L2_FIELD_TOP
236 || field == V4L2_FIELD_ALTERNATE
237 || field == V4L2_FIELD_BOTTOM) {
238 if( 4*out_y >= in_y ) {
239 lpi = 1;
240 }
241 out_y *= 2;
242 }
243 if( 0 != lpi ) {
244
245 yacm = 0;
246 yacl = 0;
247 cya_cyb = 0x00ff;
248
249 /* calculate scaling increment */
250 if ( in_y > out_y )
251 ysci = ((1024 * in_y) / (out_y + 1)) - 1024;
252 else
253 ysci = 0;
254
255 dcgy = 0;
256
257 /* calculate ype and ypo */
258 ype = ysci / 16;
259 ypo = ype + (ysci / 64);
260
261 } else {
262 yacm = 1;
263
264 /* calculate scaling increment */
265 ysci = (((10 * 1024 * (in_y - out_y - 1)) / in_y) + 9) / 10;
266
267 /* calculate ype and ypo */
268 ypo = ype = ((ysci + 15) / 16);
269
270 /* the sequence length interval (yacl) has to be set according
271 to the prescale value, e.g. [n .. 1/2) : 0
272 [1/2 .. 1/3) : 1
273 [1/3 .. 1/4) : 2
274 ... */
275 if ( ysci < 512) {
276 yacl = 0;
277 } else {
278 yacl = ( ysci / (1024 - ysci) );
279 }
280
281 /* get filter coefficients for cya, cyb from table hps_v_coeff_tab */
282 cya_cyb = hps_v_coeff_tab[ (yacl < 63 ? yacl : 63 ) ].hps_coeff;
283
284 /* get best match in the table of attenuations for vertical scaling */
285 v_atten = hps_v_coeff_tab[ (yacl < 63 ? yacl : 63 ) ].weight_sum;
286
287 for (i = 0; v_attenuation[i] != 0; i++) {
288 if (v_attenuation[i] >= v_atten)
289 break;
290 }
291
292 dcgy = i;
293 }
294
295 /* ypo and ype swapped in spec ? */
296 *hps_v_scale |= (yacm << 31) | (ysci << 21) | (yacl << 15) | (ypo << 8 ) | (ype << 1);
297
298 *hps_v_gain &= ~(MASK_W0|MASK_B2);
299 *hps_v_gain |= (dcgy << 16) | (cya_cyb << 0);
300
301 return 0;
302 }
303
304 /* simple bubble-sort algorithm with duplicate elimination */
305 static int sort_and_eliminate(u32* values, int* count)
306 {
307 int low = 0, high = 0, top = 0, temp = 0;
308 int cur = 0, next = 0;
309
310 /* sanity checks */
311 if( (0 > *count) || (NULL == values) ) {
312 return -EINVAL;
313 }
314
315 /* bubble sort the first @count items of the array @values */
316 for( top = *count; top > 0; top--) {
317 for( low = 0, high = 1; high < top; low++, high++) {
318 if( values[low] > values[high] ) {
319 temp = values[low];
320 values[low] = values[high];
321 values[high] = temp;
322 }
323 }
324 }
325
326 /* remove duplicate items */
327 for( cur = 0, next = 1; next < *count; next++) {
328 if( values[cur] != values[next])
329 values[++cur] = values[next];
330 }
331
332 *count = cur + 1;
333
334 return 0;
335 }
336
337 static void calculate_clipping_registers_rect(struct saa7146_dev *dev, struct saa7146_fh *fh,
338 struct saa7146_video_dma *vdma2, u32* clip_format, u32* arbtr_ctrl, enum v4l2_field field)
339 {
340 struct saa7146_vv *vv = dev->vv_data;
341 u32 *clipping = vv->d_clipping.cpu_addr;
342
343 int width = fh->ov.win.w.width;
344 int height = fh->ov.win.w.height;
345 int clipcount = fh->ov.nclips;
346
347 u32 line_list[32];
348 u32 pixel_list[32];
349 int numdwords = 0;
350
351 int i = 0, j = 0;
352 int cnt_line = 0, cnt_pixel = 0;
353
354 int x[32], y[32], w[32], h[32];
355
356 /* clear out memory */
357 memset(&line_list[0], 0x00, sizeof(u32)*32);
358 memset(&pixel_list[0], 0x00, sizeof(u32)*32);
359 memset(clipping, 0x00, SAA7146_CLIPPING_MEM);
360
361 /* fill the line and pixel-lists */
362 for(i = 0; i < clipcount; i++) {
363 int l = 0, r = 0, t = 0, b = 0;
364
365 x[i] = fh->ov.clips[i].c.left;
366 y[i] = fh->ov.clips[i].c.top;
367 w[i] = fh->ov.clips[i].c.width;
368 h[i] = fh->ov.clips[i].c.height;
369
370 if( w[i] < 0) {
371 x[i] += w[i]; w[i] = -w[i];
372 }
373 if( h[i] < 0) {
374 y[i] += h[i]; h[i] = -h[i];
375 }
376 if( x[i] < 0) {
377 w[i] += x[i]; x[i] = 0;
378 }
379 if( y[i] < 0) {
380 h[i] += y[i]; y[i] = 0;
381 }
382 if( 0 != vv->vflip ) {
383 y[i] = height - y[i] - h[i];
384 }
385
386 l = x[i];
387 r = x[i]+w[i];
388 t = y[i];
389 b = y[i]+h[i];
390
391 /* insert left/right coordinates */
392 pixel_list[ 2*i ] = min_t(int, l, width);
393 pixel_list[(2*i)+1] = min_t(int, r, width);
394 /* insert top/bottom coordinates */
395 line_list[ 2*i ] = min_t(int, t, height);
396 line_list[(2*i)+1] = min_t(int, b, height);
397 }
398
399 /* sort and eliminate lists */
400 cnt_line = cnt_pixel = 2*clipcount;
401 sort_and_eliminate( &pixel_list[0], &cnt_pixel );
402 sort_and_eliminate( &line_list[0], &cnt_line );
403
404 /* calculate the number of used u32s */
405 numdwords = max_t(int, (cnt_line+1), (cnt_pixel+1))*2;
406 numdwords = max_t(int, 4, numdwords);
407 numdwords = min_t(int, 64, numdwords);
408
409 /* fill up cliptable */
410 for(i = 0; i < cnt_pixel; i++) {
411 clipping[2*i] |= cpu_to_le32(pixel_list[i] << 16);
412 }
413 for(i = 0; i < cnt_line; i++) {
414 clipping[(2*i)+1] |= cpu_to_le32(line_list[i] << 16);
415 }
416
417 /* fill up cliptable with the display infos */
418 for(j = 0; j < clipcount; j++) {
419
420 for(i = 0; i < cnt_pixel; i++) {
421
422 if( x[j] < 0)
423 x[j] = 0;
424
425 if( pixel_list[i] < (x[j] + w[j])) {
426
427 if ( pixel_list[i] >= x[j] ) {
428 clipping[2*i] |= cpu_to_le32(1 << j);
429 }
430 }
431 }
432 for(i = 0; i < cnt_line; i++) {
433
434 if( y[j] < 0)
435 y[j] = 0;
436
437 if( line_list[i] < (y[j] + h[j]) ) {
438
439 if( line_list[i] >= y[j] ) {
440 clipping[(2*i)+1] |= cpu_to_le32(1 << j);
441 }
442 }
443 }
444 }
445
446 /* adjust arbitration control register */
447 *arbtr_ctrl &= 0xffff00ff;
448 *arbtr_ctrl |= 0x00001c00;
449
450 vdma2->base_even = vv->d_clipping.dma_handle;
451 vdma2->base_odd = vv->d_clipping.dma_handle;
452 vdma2->prot_addr = vv->d_clipping.dma_handle+((sizeof(u32))*(numdwords));
453 vdma2->base_page = 0x04;
454 vdma2->pitch = 0x00;
455 vdma2->num_line_byte = (0 << 16 | (sizeof(u32))*(numdwords-1) );
456
457 /* set clipping-mode. this depends on the field(s) used */
458 *clip_format &= 0xfffffff7;
459 if (V4L2_FIELD_HAS_BOTH(field)) {
460 *clip_format |= 0x00000008;
461 } else {
462 *clip_format |= 0x00000000;
463 }
464 }
465
466 /* disable clipping */
467 static void saa7146_disable_clipping(struct saa7146_dev *dev)
468 {
469 u32 clip_format = saa7146_read(dev, CLIP_FORMAT_CTRL);
470
471 /* mask out relevant bits (=lower word)*/
472 clip_format &= MASK_W1;
473
474 /* upload clipping-registers*/
475 saa7146_write(dev, CLIP_FORMAT_CTRL,clip_format);
476 saa7146_write(dev, MC2, (MASK_05 | MASK_21));
477
478 /* disable video dma2 */
479 saa7146_write(dev, MC1, MASK_21);
480 }
481
482 static void saa7146_set_clipping_rect(struct saa7146_fh *fh)
483 {
484 struct saa7146_dev *dev = fh->dev;
485 enum v4l2_field field = fh->ov.win.field;
486 struct saa7146_video_dma vdma2;
487 u32 clip_format;
488 u32 arbtr_ctrl;
489
490 /* check clipcount, disable clipping if clipcount == 0*/
491 if( fh->ov.nclips == 0 ) {
492 saa7146_disable_clipping(dev);
493 return;
494 }
495
496 clip_format = saa7146_read(dev, CLIP_FORMAT_CTRL);
497 arbtr_ctrl = saa7146_read(dev, PCI_BT_V1);
498
499 calculate_clipping_registers_rect(dev, fh, &vdma2, &clip_format, &arbtr_ctrl, field);
500
501 /* set clipping format */
502 clip_format &= 0xffff0008;
503 clip_format |= (SAA7146_CLIPPING_RECT << 4);
504
505 /* prepare video dma2 */
506 saa7146_write(dev, BASE_EVEN2, vdma2.base_even);
507 saa7146_write(dev, BASE_ODD2, vdma2.base_odd);
508 saa7146_write(dev, PROT_ADDR2, vdma2.prot_addr);
509 saa7146_write(dev, BASE_PAGE2, vdma2.base_page);
510 saa7146_write(dev, PITCH2, vdma2.pitch);
511 saa7146_write(dev, NUM_LINE_BYTE2, vdma2.num_line_byte);
512
513 /* prepare the rest */
514 saa7146_write(dev, CLIP_FORMAT_CTRL,clip_format);
515 saa7146_write(dev, PCI_BT_V1, arbtr_ctrl);
516
517 /* upload clip_control-register, clipping-registers, enable video dma2 */
518 saa7146_write(dev, MC2, (MASK_05 | MASK_21 | MASK_03 | MASK_19));
519 saa7146_write(dev, MC1, (MASK_05 | MASK_21));
520 }
521
522 static void saa7146_set_window(struct saa7146_dev *dev, int width, int height, enum v4l2_field field)
523 {
524 struct saa7146_vv *vv = dev->vv_data;
525
526 int source = vv->current_hps_source;
527 int sync = vv->current_hps_sync;
528
529 u32 hps_v_scale = 0, hps_v_gain = 0, hps_ctrl = 0, hps_h_prescale = 0, hps_h_scale = 0;
530
531 /* set vertical scale */
532 hps_v_scale = 0; /* all bits get set by the function-call */
533 hps_v_gain = 0; /* fixme: saa7146_read(dev, HPS_V_GAIN);*/
534 calculate_v_scale_registers(dev, field, vv->standard->v_field*2, height, &hps_v_scale, &hps_v_gain);
535
536 /* set horizontal scale */
537 hps_ctrl = 0;
538 hps_h_prescale = 0; /* all bits get set in the function */
539 hps_h_scale = 0;
540 calculate_h_scale_registers(dev, vv->standard->h_pixels, width, vv->hflip, &hps_ctrl, &hps_v_gain, &hps_h_prescale, &hps_h_scale);
541
542 /* set hyo and hxo */
543 calculate_hxo_and_hyo(vv, &hps_h_scale, &hps_ctrl);
544 calculate_hps_source_and_sync(dev, source, sync, &hps_ctrl);
545
546 /* write out new register contents */
547 saa7146_write(dev, HPS_V_SCALE, hps_v_scale);
548 saa7146_write(dev, HPS_V_GAIN, hps_v_gain);
549 saa7146_write(dev, HPS_CTRL, hps_ctrl);
550 saa7146_write(dev, HPS_H_PRESCALE,hps_h_prescale);
551 saa7146_write(dev, HPS_H_SCALE, hps_h_scale);
552
553 /* upload shadow-ram registers */
554 saa7146_write(dev, MC2, (MASK_05 | MASK_06 | MASK_21 | MASK_22) );
555 }
556
557 /* calculate the new memory offsets for a desired position */
558 static void saa7146_set_position(struct saa7146_dev *dev, int w_x, int w_y, int w_height, enum v4l2_field field, u32 pixelformat)
559 {
560 struct saa7146_vv *vv = dev->vv_data;
561 struct saa7146_format *sfmt = format_by_fourcc(dev, pixelformat);
562
563 int b_depth = vv->ov_fmt->depth;
564 int b_bpl = vv->ov_fb.fmt.bytesperline;
565 /* The unsigned long cast is to remove a 64-bit compile warning since
566 it looks like a 64-bit address is cast to a 32-bit value, even
567 though the base pointer is really a 32-bit physical address that
568 goes into a 32-bit DMA register.
569 FIXME: might not work on some 64-bit platforms, but see the FIXME
570 in struct v4l2_framebuffer (videodev2.h) for that.
571 */
572 u32 base = (u32)(unsigned long)vv->ov_fb.base;
573
574 struct saa7146_video_dma vdma1;
575
576 /* calculate memory offsets for picture, look if we shall top-down-flip */
577 vdma1.pitch = 2*b_bpl;
578 if ( 0 == vv->vflip ) {
579 vdma1.base_even = base + (w_y * (vdma1.pitch/2)) + (w_x * (b_depth / 8));
580 vdma1.base_odd = vdma1.base_even + (vdma1.pitch / 2);
581 vdma1.prot_addr = vdma1.base_even + (w_height * (vdma1.pitch / 2));
582 }
583 else {
584 vdma1.base_even = base + ((w_y+w_height) * (vdma1.pitch/2)) + (w_x * (b_depth / 8));
585 vdma1.base_odd = vdma1.base_even - (vdma1.pitch / 2);
586 vdma1.prot_addr = vdma1.base_odd - (w_height * (vdma1.pitch / 2));
587 }
588
589 if (V4L2_FIELD_HAS_BOTH(field)) {
590 } else if (field == V4L2_FIELD_ALTERNATE) {
591 /* fixme */
592 vdma1.base_odd = vdma1.prot_addr;
593 vdma1.pitch /= 2;
594 } else if (field == V4L2_FIELD_TOP) {
595 vdma1.base_odd = vdma1.prot_addr;
596 vdma1.pitch /= 2;
597 } else if (field == V4L2_FIELD_BOTTOM) {
598 vdma1.base_odd = vdma1.base_even;
599 vdma1.base_even = vdma1.prot_addr;
600 vdma1.pitch /= 2;
601 }
602
603 if ( 0 != vv->vflip ) {
604 vdma1.pitch *= -1;
605 }
606
607 vdma1.base_page = sfmt->swap;
608 vdma1.num_line_byte = (vv->standard->v_field<<16)+vv->standard->h_pixels;
609
610 saa7146_write_out_dma(dev, 1, &vdma1);
611 }
612
613 static void saa7146_set_output_format(struct saa7146_dev *dev, unsigned long palette)
614 {
615 u32 clip_format = saa7146_read(dev, CLIP_FORMAT_CTRL);
616
617 /* call helper function */
618 calculate_output_format_register(dev,palette,&clip_format);
619
620 /* update the hps registers */
621 saa7146_write(dev, CLIP_FORMAT_CTRL, clip_format);
622 saa7146_write(dev, MC2, (MASK_05 | MASK_21));
623 }
624
625 /* select input-source */
626 void saa7146_set_hps_source_and_sync(struct saa7146_dev *dev, int source, int sync)
627 {
628 struct saa7146_vv *vv = dev->vv_data;
629 u32 hps_ctrl = 0;
630
631 /* read old state */
632 hps_ctrl = saa7146_read(dev, HPS_CTRL);
633
634 hps_ctrl &= ~( MASK_31 | MASK_30 | MASK_28 );
635 hps_ctrl |= (source << 30) | (sync << 28);
636
637 /* write back & upload register */
638 saa7146_write(dev, HPS_CTRL, hps_ctrl);
639 saa7146_write(dev, MC2, (MASK_05 | MASK_21));
640
641 vv->current_hps_source = source;
642 vv->current_hps_sync = sync;
643 }
644 EXPORT_SYMBOL_GPL(saa7146_set_hps_source_and_sync);
645
646 int saa7146_enable_overlay(struct saa7146_fh *fh)
647 {
648 struct saa7146_dev *dev = fh->dev;
649 struct saa7146_vv *vv = dev->vv_data;
650
651 saa7146_set_window(dev, fh->ov.win.w.width, fh->ov.win.w.height, fh->ov.win.field);
652 saa7146_set_position(dev, fh->ov.win.w.left, fh->ov.win.w.top, fh->ov.win.w.height, fh->ov.win.field, vv->ov_fmt->pixelformat);
653 saa7146_set_output_format(dev, vv->ov_fmt->trans);
654 saa7146_set_clipping_rect(fh);
655
656 /* enable video dma1 */
657 saa7146_write(dev, MC1, (MASK_06 | MASK_22));
658 return 0;
659 }
660
661 void saa7146_disable_overlay(struct saa7146_fh *fh)
662 {
663 struct saa7146_dev *dev = fh->dev;
664
665 /* disable clipping + video dma1 */
666 saa7146_disable_clipping(dev);
667 saa7146_write(dev, MC1, MASK_22);
668 }
669
670 void saa7146_write_out_dma(struct saa7146_dev* dev, int which, struct saa7146_video_dma* vdma)
671 {
672 int where = 0;
673
674 if( which < 1 || which > 3) {
675 return;
676 }
677
678 /* calculate starting address */
679 where = (which-1)*0x18;
680
681 saa7146_write(dev, where, vdma->base_odd);
682 saa7146_write(dev, where+0x04, vdma->base_even);
683 saa7146_write(dev, where+0x08, vdma->prot_addr);
684 saa7146_write(dev, where+0x0c, vdma->pitch);
685 saa7146_write(dev, where+0x10, vdma->base_page);
686 saa7146_write(dev, where+0x14, vdma->num_line_byte);
687
688 /* upload */
689 saa7146_write(dev, MC2, (MASK_02<<(which-1))|(MASK_18<<(which-1)));
690 /*
691 printk("vdma%d.base_even: 0x%08x\n", which,vdma->base_even);
692 printk("vdma%d.base_odd: 0x%08x\n", which,vdma->base_odd);
693 printk("vdma%d.prot_addr: 0x%08x\n", which,vdma->prot_addr);
694 printk("vdma%d.base_page: 0x%08x\n", which,vdma->base_page);
695 printk("vdma%d.pitch: 0x%08x\n", which,vdma->pitch);
696 printk("vdma%d.num_line_byte: 0x%08x\n", which,vdma->num_line_byte);
697 */
698 }
699
700 static int calculate_video_dma_grab_packed(struct saa7146_dev* dev, struct saa7146_buf *buf)
701 {
702 struct saa7146_vv *vv = dev->vv_data;
703 struct saa7146_video_dma vdma1;
704
705 struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
706
707 int width = buf->fmt->width;
708 int height = buf->fmt->height;
709 int bytesperline = buf->fmt->bytesperline;
710 enum v4l2_field field = buf->fmt->field;
711
712 int depth = sfmt->depth;
713
714 DEB_CAP(("[size=%dx%d,fields=%s]\n",
715 width,height,v4l2_field_names[field]));
716
717 if( bytesperline != 0) {
718 vdma1.pitch = bytesperline*2;
719 } else {
720 vdma1.pitch = (width*depth*2)/8;
721 }
722 vdma1.num_line_byte = ((vv->standard->v_field<<16) + vv->standard->h_pixels);
723 vdma1.base_page = buf->pt[0].dma | ME1 | sfmt->swap;
724
725 if( 0 != vv->vflip ) {
726 vdma1.prot_addr = buf->pt[0].offset;
727 vdma1.base_even = buf->pt[0].offset+(vdma1.pitch/2)*height;
728 vdma1.base_odd = vdma1.base_even - (vdma1.pitch/2);
729 } else {
730 vdma1.base_even = buf->pt[0].offset;
731 vdma1.base_odd = vdma1.base_even + (vdma1.pitch/2);
732 vdma1.prot_addr = buf->pt[0].offset+(vdma1.pitch/2)*height;
733 }
734
735 if (V4L2_FIELD_HAS_BOTH(field)) {
736 } else if (field == V4L2_FIELD_ALTERNATE) {
737 /* fixme */
738 if ( vv->last_field == V4L2_FIELD_TOP ) {
739 vdma1.base_odd = vdma1.prot_addr;
740 vdma1.pitch /= 2;
741 } else if ( vv->last_field == V4L2_FIELD_BOTTOM ) {
742 vdma1.base_odd = vdma1.base_even;
743 vdma1.base_even = vdma1.prot_addr;
744 vdma1.pitch /= 2;
745 }
746 } else if (field == V4L2_FIELD_TOP) {
747 vdma1.base_odd = vdma1.prot_addr;
748 vdma1.pitch /= 2;
749 } else if (field == V4L2_FIELD_BOTTOM) {
750 vdma1.base_odd = vdma1.base_even;
751 vdma1.base_even = vdma1.prot_addr;
752 vdma1.pitch /= 2;
753 }
754
755 if( 0 != vv->vflip ) {
756 vdma1.pitch *= -1;
757 }
758
759 saa7146_write_out_dma(dev, 1, &vdma1);
760 return 0;
761 }
762
763 static int calc_planar_422(struct saa7146_vv *vv, struct saa7146_buf *buf, struct saa7146_video_dma *vdma2, struct saa7146_video_dma *vdma3)
764 {
765 int height = buf->fmt->height;
766 int width = buf->fmt->width;
767
768 vdma2->pitch = width;
769 vdma3->pitch = width;
770
771 /* fixme: look at bytesperline! */
772
773 if( 0 != vv->vflip ) {
774 vdma2->prot_addr = buf->pt[1].offset;
775 vdma2->base_even = ((vdma2->pitch/2)*height)+buf->pt[1].offset;
776 vdma2->base_odd = vdma2->base_even - (vdma2->pitch/2);
777
778 vdma3->prot_addr = buf->pt[2].offset;
779 vdma3->base_even = ((vdma3->pitch/2)*height)+buf->pt[2].offset;
780 vdma3->base_odd = vdma3->base_even - (vdma3->pitch/2);
781 } else {
782 vdma3->base_even = buf->pt[2].offset;
783 vdma3->base_odd = vdma3->base_even + (vdma3->pitch/2);
784 vdma3->prot_addr = (vdma3->pitch/2)*height+buf->pt[2].offset;
785
786 vdma2->base_even = buf->pt[1].offset;
787 vdma2->base_odd = vdma2->base_even + (vdma2->pitch/2);
788 vdma2->prot_addr = (vdma2->pitch/2)*height+buf->pt[1].offset;
789 }
790
791 return 0;
792 }
793
794 static int calc_planar_420(struct saa7146_vv *vv, struct saa7146_buf *buf, struct saa7146_video_dma *vdma2, struct saa7146_video_dma *vdma3)
795 {
796 int height = buf->fmt->height;
797 int width = buf->fmt->width;
798
799 vdma2->pitch = width/2;
800 vdma3->pitch = width/2;
801
802 if( 0 != vv->vflip ) {
803 vdma2->prot_addr = buf->pt[2].offset;
804 vdma2->base_even = ((vdma2->pitch/2)*height)+buf->pt[2].offset;
805 vdma2->base_odd = vdma2->base_even - (vdma2->pitch/2);
806
807 vdma3->prot_addr = buf->pt[1].offset;
808 vdma3->base_even = ((vdma3->pitch/2)*height)+buf->pt[1].offset;
809 vdma3->base_odd = vdma3->base_even - (vdma3->pitch/2);
810
811 } else {
812 vdma3->base_even = buf->pt[2].offset;
813 vdma3->base_odd = vdma3->base_even + (vdma3->pitch);
814 vdma3->prot_addr = (vdma3->pitch/2)*height+buf->pt[2].offset;
815
816 vdma2->base_even = buf->pt[1].offset;
817 vdma2->base_odd = vdma2->base_even + (vdma2->pitch);
818 vdma2->prot_addr = (vdma2->pitch/2)*height+buf->pt[1].offset;
819 }
820 return 0;
821 }
822
823 static int calculate_video_dma_grab_planar(struct saa7146_dev* dev, struct saa7146_buf *buf)
824 {
825 struct saa7146_vv *vv = dev->vv_data;
826 struct saa7146_video_dma vdma1;
827 struct saa7146_video_dma vdma2;
828 struct saa7146_video_dma vdma3;
829
830 struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
831
832 int width = buf->fmt->width;
833 int height = buf->fmt->height;
834 enum v4l2_field field = buf->fmt->field;
835
836 BUG_ON(0 == buf->pt[0].dma);
837 BUG_ON(0 == buf->pt[1].dma);
838 BUG_ON(0 == buf->pt[2].dma);
839
840 DEB_CAP(("[size=%dx%d,fields=%s]\n",
841 width,height,v4l2_field_names[field]));
842
843 /* fixme: look at bytesperline! */
844
845 /* fixme: what happens for user space buffers here?. The offsets are
846 most likely wrong, this version here only works for page-aligned
847 buffers, modifications to the pagetable-functions are necessary...*/
848
849 vdma1.pitch = width*2;
850 vdma1.num_line_byte = ((vv->standard->v_field<<16) + vv->standard->h_pixels);
851 vdma1.base_page = buf->pt[0].dma | ME1;
852
853 if( 0 != vv->vflip ) {
854 vdma1.prot_addr = buf->pt[0].offset;
855 vdma1.base_even = ((vdma1.pitch/2)*height)+buf->pt[0].offset;
856 vdma1.base_odd = vdma1.base_even - (vdma1.pitch/2);
857 } else {
858 vdma1.base_even = buf->pt[0].offset;
859 vdma1.base_odd = vdma1.base_even + (vdma1.pitch/2);
860 vdma1.prot_addr = (vdma1.pitch/2)*height+buf->pt[0].offset;
861 }
862
863 vdma2.num_line_byte = 0; /* unused */
864 vdma2.base_page = buf->pt[1].dma | ME1;
865
866 vdma3.num_line_byte = 0; /* unused */
867 vdma3.base_page = buf->pt[2].dma | ME1;
868
869 switch( sfmt->depth ) {
870 case 12: {
871 calc_planar_420(vv,buf,&vdma2,&vdma3);
872 break;
873 }
874 case 16: {
875 calc_planar_422(vv,buf,&vdma2,&vdma3);
876 break;
877 }
878 default: {
879 return -1;
880 }
881 }
882
883 if (V4L2_FIELD_HAS_BOTH(field)) {
884 } else if (field == V4L2_FIELD_ALTERNATE) {
885 /* fixme */
886 vdma1.base_odd = vdma1.prot_addr;
887 vdma1.pitch /= 2;
888 vdma2.base_odd = vdma2.prot_addr;
889 vdma2.pitch /= 2;
890 vdma3.base_odd = vdma3.prot_addr;
891 vdma3.pitch /= 2;
892 } else if (field == V4L2_FIELD_TOP) {
893 vdma1.base_odd = vdma1.prot_addr;
894 vdma1.pitch /= 2;
895 vdma2.base_odd = vdma2.prot_addr;
896 vdma2.pitch /= 2;
897 vdma3.base_odd = vdma3.prot_addr;
898 vdma3.pitch /= 2;
899 } else if (field == V4L2_FIELD_BOTTOM) {
900 vdma1.base_odd = vdma1.base_even;
901 vdma1.base_even = vdma1.prot_addr;
902 vdma1.pitch /= 2;
903 vdma2.base_odd = vdma2.base_even;
904 vdma2.base_even = vdma2.prot_addr;
905 vdma2.pitch /= 2;
906 vdma3.base_odd = vdma3.base_even;
907 vdma3.base_even = vdma3.prot_addr;
908 vdma3.pitch /= 2;
909 }
910
911 if( 0 != vv->vflip ) {
912 vdma1.pitch *= -1;
913 vdma2.pitch *= -1;
914 vdma3.pitch *= -1;
915 }
916
917 saa7146_write_out_dma(dev, 1, &vdma1);
918 if( (sfmt->flags & FORMAT_BYTE_SWAP) != 0 ) {
919 saa7146_write_out_dma(dev, 3, &vdma2);
920 saa7146_write_out_dma(dev, 2, &vdma3);
921 } else {
922 saa7146_write_out_dma(dev, 2, &vdma2);
923 saa7146_write_out_dma(dev, 3, &vdma3);
924 }
925 return 0;
926 }
927
928 static void program_capture_engine(struct saa7146_dev *dev, int planar)
929 {
930 struct saa7146_vv *vv = dev->vv_data;
931 int count = 0;
932
933 unsigned long e_wait = vv->current_hps_sync == SAA7146_HPS_SYNC_PORT_A ? CMD_E_FID_A : CMD_E_FID_B;
934 unsigned long o_wait = vv->current_hps_sync == SAA7146_HPS_SYNC_PORT_A ? CMD_O_FID_A : CMD_O_FID_B;
935
936 /* wait for o_fid_a/b / e_fid_a/b toggle only if rps register 0 is not set*/
937 WRITE_RPS0(CMD_PAUSE | CMD_OAN | CMD_SIG0 | o_wait);
938 WRITE_RPS0(CMD_PAUSE | CMD_OAN | CMD_SIG0 | e_wait);
939
940 /* set rps register 0 */
941 WRITE_RPS0(CMD_WR_REG | (1 << 8) | (MC2/4));
942 WRITE_RPS0(MASK_27 | MASK_11);
943
944 /* turn on video-dma1 */
945 WRITE_RPS0(CMD_WR_REG_MASK | (MC1/4));
946 WRITE_RPS0(MASK_06 | MASK_22); /* => mask */
947 WRITE_RPS0(MASK_06 | MASK_22); /* => values */
948 if( 0 != planar ) {
949 /* turn on video-dma2 */
950 WRITE_RPS0(CMD_WR_REG_MASK | (MC1/4));
951 WRITE_RPS0(MASK_05 | MASK_21); /* => mask */
952 WRITE_RPS0(MASK_05 | MASK_21); /* => values */
953
954 /* turn on video-dma3 */
955 WRITE_RPS0(CMD_WR_REG_MASK | (MC1/4));
956 WRITE_RPS0(MASK_04 | MASK_20); /* => mask */
957 WRITE_RPS0(MASK_04 | MASK_20); /* => values */
958 }
959
960 /* wait for o_fid_a/b / e_fid_a/b toggle */
961 if ( vv->last_field == V4L2_FIELD_INTERLACED ) {
962 WRITE_RPS0(CMD_PAUSE | o_wait);
963 WRITE_RPS0(CMD_PAUSE | e_wait);
964 } else if ( vv->last_field == V4L2_FIELD_TOP ) {
965 WRITE_RPS0(CMD_PAUSE | (vv->current_hps_sync == SAA7146_HPS_SYNC_PORT_A ? MASK_10 : MASK_09));
966 WRITE_RPS0(CMD_PAUSE | o_wait);
967 } else if ( vv->last_field == V4L2_FIELD_BOTTOM ) {
968 WRITE_RPS0(CMD_PAUSE | (vv->current_hps_sync == SAA7146_HPS_SYNC_PORT_A ? MASK_10 : MASK_09));
969 WRITE_RPS0(CMD_PAUSE | e_wait);
970 }
971
972 /* turn off video-dma1 */
973 WRITE_RPS0(CMD_WR_REG_MASK | (MC1/4));
974 WRITE_RPS0(MASK_22 | MASK_06); /* => mask */
975 WRITE_RPS0(MASK_22); /* => values */
976 if( 0 != planar ) {
977 /* turn off video-dma2 */
978 WRITE_RPS0(CMD_WR_REG_MASK | (MC1/4));
979 WRITE_RPS0(MASK_05 | MASK_21); /* => mask */
980 WRITE_RPS0(MASK_21); /* => values */
981
982 /* turn off video-dma3 */
983 WRITE_RPS0(CMD_WR_REG_MASK | (MC1/4));
984 WRITE_RPS0(MASK_04 | MASK_20); /* => mask */
985 WRITE_RPS0(MASK_20); /* => values */
986 }
987
988 /* generate interrupt */
989 WRITE_RPS0(CMD_INTERRUPT);
990
991 /* stop */
992 WRITE_RPS0(CMD_STOP);
993 }
994
995 void saa7146_set_capture(struct saa7146_dev *dev, struct saa7146_buf *buf, struct saa7146_buf *next)
996 {
997 struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat);
998 struct saa7146_vv *vv = dev->vv_data;
999 u32 vdma1_prot_addr;
1000
1001 DEB_CAP(("buf:%p, next:%p\n",buf,next));
1002
1003 vdma1_prot_addr = saa7146_read(dev, PROT_ADDR1);
1004 if( 0 == vdma1_prot_addr ) {
1005 /* clear out beginning of streaming bit (rps register 0)*/
1006 DEB_CAP(("forcing sync to new frame\n"));
1007 saa7146_write(dev, MC2, MASK_27 );
1008 }
1009
1010 saa7146_set_window(dev, buf->fmt->width, buf->fmt->height, buf->fmt->field);
1011 saa7146_set_output_format(dev, sfmt->trans);
1012 saa7146_disable_clipping(dev);
1013
1014 if ( vv->last_field == V4L2_FIELD_INTERLACED ) {
1015 } else if ( vv->last_field == V4L2_FIELD_TOP ) {
1016 vv->last_field = V4L2_FIELD_BOTTOM;
1017 } else if ( vv->last_field == V4L2_FIELD_BOTTOM ) {
1018 vv->last_field = V4L2_FIELD_TOP;
1019 }
1020
1021 if( 0 != IS_PLANAR(sfmt->trans)) {
1022 calculate_video_dma_grab_planar(dev, buf);
1023 program_capture_engine(dev,1);
1024 } else {
1025 calculate_video_dma_grab_packed(dev, buf);
1026 program_capture_engine(dev,0);
1027 }
1028
1029 /*
1030 printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
1031 printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
1032 printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
1033 printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
1034 printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1));
1035 printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
1036 printk("vdma%d => vptr : 0x%08x\n", 1,saa7146_read(dev,PCI_VDP1));
1037 */
1038
1039 /* write the address of the rps-program */
1040 saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
1041
1042 /* turn on rps */
1043 saa7146_write(dev, MC1, (MASK_12 | MASK_28));
1044 }
mah project overlay