?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
V4L/DVB (13008): gspca - stv06xx-hdcs: Fixup exposure
[linux-2.6/linux-2.6-openrd.git] / drivers / media / video / gspca / stv06xx / stv06xx_hdcs.c
blob1655dcd1a5dc97e9df7605c6df9fe59c926112fa
1 /*
2 * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
3 * Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
4 * Copyright (c) 2002, 2003 Tuukka Toivonen
5 * Copyright (c) 2008 Erik Andrén
6 * Copyright (c) 2008 Chia-I Wu
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 * P/N 861037: Sensor HDCS1000 ASIC STV0600
23 * P/N 861050-0010: Sensor HDCS1000 ASIC STV0600
24 * P/N 861050-0020: Sensor Photobit PB100 ASIC STV0600-1 - QuickCam Express
25 * P/N 861055: Sensor ST VV6410 ASIC STV0610 - LEGO cam
26 * P/N 861075-0040: Sensor HDCS1000 ASIC
27 * P/N 961179-0700: Sensor ST VV6410 ASIC STV0602 - Dexxa WebCam USB
28 * P/N 861040-0000: Sensor ST VV6410 ASIC STV0610 - QuickCam Web
29 */
30
31 #include "stv06xx_hdcs.h"
32
33 static const struct ctrl hdcs1x00_ctrl[] = {
34 {
35 {
36 .id = V4L2_CID_EXPOSURE,
37 .type = V4L2_CTRL_TYPE_INTEGER,
38 .name = "exposure",
39 .minimum = 0x00,
40 .maximum = 0xffff,
41 .step = 0x1,
42 .default_value = HDCS_DEFAULT_EXPOSURE,
43 .flags = V4L2_CTRL_FLAG_SLIDER
44 },
45 .set = hdcs_set_exposure,
46 .get = hdcs_get_exposure
47 }, {
48 {
49 .id = V4L2_CID_GAIN,
50 .type = V4L2_CTRL_TYPE_INTEGER,
51 .name = "gain",
52 .minimum = 0x00,
53 .maximum = 0xff,
54 .step = 0x1,
55 .default_value = HDCS_DEFAULT_GAIN,
56 .flags = V4L2_CTRL_FLAG_SLIDER
57 },
58 .set = hdcs_set_gain,
59 .get = hdcs_get_gain
60 }
61 };
62
63 static struct v4l2_pix_format hdcs1x00_mode[] = {
64 {
65 HDCS_1X00_DEF_WIDTH,
66 HDCS_1X00_DEF_HEIGHT,
67 V4L2_PIX_FMT_SGRBG8,
68 V4L2_FIELD_NONE,
69 .sizeimage =
70 HDCS_1X00_DEF_WIDTH * HDCS_1X00_DEF_HEIGHT,
71 .bytesperline = HDCS_1X00_DEF_WIDTH,
72 .colorspace = V4L2_COLORSPACE_SRGB,
73 .priv = 1
74 }
75 };
76
77 static const struct ctrl hdcs1020_ctrl[] = {
78 {
79 {
80 .id = V4L2_CID_EXPOSURE,
81 .type = V4L2_CTRL_TYPE_INTEGER,
82 .name = "exposure",
83 .minimum = 0x00,
84 .maximum = 0xffff,
85 .step = 0x1,
86 .default_value = HDCS_DEFAULT_EXPOSURE,
87 .flags = V4L2_CTRL_FLAG_SLIDER
88 },
89 .set = hdcs_set_exposure,
90 .get = hdcs_get_exposure
91 }, {
92 {
93 .id = V4L2_CID_GAIN,
94 .type = V4L2_CTRL_TYPE_INTEGER,
95 .name = "gain",
96 .minimum = 0x00,
97 .maximum = 0xff,
98 .step = 0x1,
99 .default_value = HDCS_DEFAULT_GAIN,
100 .flags = V4L2_CTRL_FLAG_SLIDER
101 },
102 .set = hdcs_set_gain,
103 .get = hdcs_get_gain
104 }
105 };
106
107 static struct v4l2_pix_format hdcs1020_mode[] = {
108 {
109 HDCS_1020_DEF_WIDTH,
110 HDCS_1020_DEF_HEIGHT,
111 V4L2_PIX_FMT_SGRBG8,
112 V4L2_FIELD_NONE,
113 .sizeimage =
114 HDCS_1020_DEF_WIDTH * HDCS_1020_DEF_HEIGHT,
115 .bytesperline = HDCS_1020_DEF_WIDTH,
116 .colorspace = V4L2_COLORSPACE_SRGB,
117 .priv = 1
118 }
119 };
120
121 enum hdcs_power_state {
122 HDCS_STATE_SLEEP,
123 HDCS_STATE_IDLE,
124 HDCS_STATE_RUN
125 };
126
127 /* no lock? */
128 struct hdcs {
129 enum hdcs_power_state state;
130 int w, h;
131
132 /* visible area of the sensor array */
133 struct {
134 int left, top;
135 int width, height;
136 int border;
137 } array;
138
139 struct {
140 /* Column timing overhead */
141 u8 cto;
142 /* Column processing overhead */
143 u8 cpo;
144 /* Row sample period constant */
145 u16 rs;
146 /* Exposure reset duration */
147 u16 er;
148 } exp;
149
150 int psmp;
151 };
152
153 static int hdcs_reg_write_seq(struct sd *sd, u8 reg, u8 *vals, u8 len)
154 {
155 u8 regs[I2C_MAX_BYTES * 2];
156 int i;
157
158 if (unlikely((len <= 0) || (len >= I2C_MAX_BYTES) ||
159 (reg + len > 0xff)))
160 return -EINVAL;
161
162 for (i = 0; i < len; i++) {
163 regs[2 * i] = reg;
164 regs[2 * i + 1] = vals[i];
165 /* All addresses are shifted left one bit as bit 0 toggles r/w */
166 reg += 2;
167 }
168
169 return stv06xx_write_sensor_bytes(sd, regs, len);
170 }
171
172 static int hdcs_set_state(struct sd *sd, enum hdcs_power_state state)
173 {
174 struct hdcs *hdcs = sd->sensor_priv;
175 u8 val;
176 int ret;
177
178 if (hdcs->state == state)
179 return 0;
180
181 /* we need to go idle before running or sleeping */
182 if (hdcs->state != HDCS_STATE_IDLE) {
183 ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0);
184 if (ret)
185 return ret;
186 }
187
188 hdcs->state = HDCS_STATE_IDLE;
189
190 if (state == HDCS_STATE_IDLE)
191 return 0;
192
193 switch (state) {
194 case HDCS_STATE_SLEEP:
195 val = HDCS_SLEEP_MODE;
196 break;
197
198 case HDCS_STATE_RUN:
199 val = HDCS_RUN_ENABLE;
200 break;
201
202 default:
203 return -EINVAL;
204 }
205
206 ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), val);
207
208 /* Update the state if the write succeeded */
209 if (!ret)
210 hdcs->state = state;
211
212 return ret;
213 }
214
215 static int hdcs_reset(struct sd *sd)
216 {
217 struct hdcs *hdcs = sd->sensor_priv;
218 int err;
219
220 err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 1);
221 if (err < 0)
222 return err;
223
224 err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0);
225 if (err < 0)
226 hdcs->state = HDCS_STATE_IDLE;
227
228 return err;
229 }
230
231 static int hdcs_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
232 {
233 struct sd *sd = (struct sd *) gspca_dev;
234 struct hdcs *hdcs = sd->sensor_priv;
235
236 /* Column time period */
237 int ct;
238 /* Column processing period */
239 int cp;
240 /* Row processing period */
241 int rp;
242 int cycles;
243 int err;
244 int rowexp;
245 u16 data[2];
246
247 err = stv06xx_read_sensor(sd, HDCS_ROWEXPL, &data[0]);
248 if (err < 0)
249 return err;
250
251 err = stv06xx_read_sensor(sd, HDCS_ROWEXPH, &data[1]);
252 if (err < 0)
253 return err;
254
255 rowexp = (data[1] << 8) | data[0];
256
257 ct = hdcs->exp.cto + hdcs->psmp + (HDCS_ADC_START_SIG_DUR + 2);
258 cp = hdcs->exp.cto + (hdcs->w * ct / 2);
259 rp = hdcs->exp.rs + cp;
260
261 cycles = rp * rowexp;
262 *val = cycles / HDCS_CLK_FREQ_MHZ;
263 PDEBUG(D_V4L2, "Read exposure %d", *val);
264 return 0;
265 }
266
267 static int hdcs_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
268 {
269 struct sd *sd = (struct sd *) gspca_dev;
270 struct hdcs *hdcs = sd->sensor_priv;
271 int rowexp, srowexp;
272 int max_srowexp;
273 /* Column time period */
274 int ct;
275 /* Column processing period */
276 int cp;
277 /* Row processing period */
278 int rp;
279 /* Minimum number of column timing periods
280 within the column processing period */
281 int mnct;
282 int cycles, err;
283 u8 exp[14];
284
285 cycles = val * HDCS_CLK_FREQ_MHZ;
286
287 ct = hdcs->exp.cto + hdcs->psmp + (HDCS_ADC_START_SIG_DUR + 2);
288 cp = hdcs->exp.cto + (hdcs->w * ct / 2);
289
290 /* the cycles one row takes */
291 rp = hdcs->exp.rs + cp;
292
293 rowexp = cycles / rp;
294
295 /* the remaining cycles */
296 cycles -= rowexp * rp;
297
298 /* calculate sub-row exposure */
299 if (IS_1020(sd)) {
300 /* see HDCS-1020 datasheet 3.5.6.4, p. 63 */
301 srowexp = hdcs->w - (cycles + hdcs->exp.er + 13) / ct;
302
303 mnct = (hdcs->exp.er + 12 + ct - 1) / ct;
304 max_srowexp = hdcs->w - mnct;
305 } else {
306 /* see HDCS-1000 datasheet 3.4.5.5, p. 61 */
307 srowexp = cp - hdcs->exp.er - 6 - cycles;
308
309 mnct = (hdcs->exp.er + 5 + ct - 1) / ct;
310 max_srowexp = cp - mnct * ct - 1;
311 }
312
313 if (srowexp < 0)
314 srowexp = 0;
315 else if (srowexp > max_srowexp)
316 srowexp = max_srowexp;
317
318 if (IS_1020(sd)) {
319 exp[0] = HDCS20_CONTROL;
320 exp[1] = 0x00; /* Stop streaming */
321 exp[2] = HDCS_ROWEXPL;
322 exp[3] = rowexp & 0xff;
323 exp[4] = HDCS_ROWEXPH;
324 exp[5] = rowexp >> 8;
325 exp[6] = HDCS20_SROWEXP;
326 exp[7] = (srowexp >> 2) & 0xff;
327 exp[8] = HDCS20_ERROR;
328 exp[9] = 0x10; /* Clear exposure error flag*/
329 exp[10] = HDCS20_CONTROL;
330 exp[11] = 0x04; /* Restart streaming */
331 err = stv06xx_write_sensor_bytes(sd, exp, 6);
332 } else {
333 exp[0] = HDCS00_CONTROL;
334 exp[1] = 0x00; /* Stop streaming */
335 exp[2] = HDCS_ROWEXPL;
336 exp[3] = rowexp & 0xff;
337 exp[4] = HDCS_ROWEXPH;
338 exp[5] = rowexp >> 8;
339 exp[6] = HDCS00_SROWEXPL;
340 exp[7] = srowexp & 0xff;
341 exp[8] = HDCS00_SROWEXPH;
342 exp[9] = srowexp >> 8;
343 exp[10] = HDCS_STATUS;
344 exp[11] = 0x10; /* Clear exposure error flag*/
345 exp[12] = HDCS00_CONTROL;
346 exp[13] = 0x04; /* Restart streaming */
347 err = stv06xx_write_sensor_bytes(sd, exp, 7);
348 if (err < 0)
349 return err;
350 }
351 PDEBUG(D_V4L2, "Writing exposure %d, rowexp %d, srowexp %d",
352 val, rowexp, srowexp);
353 return err;
354 }
355
356 static int hdcs_set_gains(struct sd *sd, u8 r, u8 g, u8 b)
357 {
358 u8 gains[4];
359
360 /* the voltage gain Av = (1 + 19 * val / 127) * (1 + bit7) */
361 if (r > 127)
362 r = 0x80 | (r / 2);
363 if (g > 127)
364 g = 0x80 | (g / 2);
365 if (b > 127)
366 b = 0x80 | (b / 2);
367
368 gains[0] = g;
369 gains[1] = r;
370 gains[2] = b;
371 gains[3] = g;
372
373 return hdcs_reg_write_seq(sd, HDCS_ERECPGA, gains, 4);
374 }
375
376 static int hdcs_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
377 {
378 struct sd *sd = (struct sd *) gspca_dev;
379 int err;
380 u16 data;
381
382 err = stv06xx_read_sensor(sd, HDCS_ERECPGA, &data);
383
384 /* Bit 7 doubles the gain */
385 if (data & 0x80)
386 *val = (data & 0x7f) * 2;
387 else
388 *val = data;
389
390 PDEBUG(D_V4L2, "Read gain %d", *val);
391 return err;
392 }
393
394 static int hdcs_set_gain(struct gspca_dev *gspca_dev, __s32 val)
395 {
396 PDEBUG(D_V4L2, "Writing gain %d", val);
397 return hdcs_set_gains((struct sd *) gspca_dev,
398 val & 0xff, val & 0xff, val & 0xff);
399 }
400
401 static int hdcs_set_size(struct sd *sd,
402 unsigned int width, unsigned int height)
403 {
404 struct hdcs *hdcs = sd->sensor_priv;
405 u8 win[4];
406 unsigned int x, y;
407 int err;
408
409 /* must be multiple of 4 */
410 width = (width + 3) & ~0x3;
411 height = (height + 3) & ~0x3;
412
413 if (width > hdcs->array.width)
414 width = hdcs->array.width;
415
416 if (IS_1020(sd)) {
417 /* the borders are also invalid */
418 if (height + 2 * hdcs->array.border + HDCS_1020_BOTTOM_Y_SKIP
419 > hdcs->array.height)
420 height = hdcs->array.height - 2 * hdcs->array.border -
421 HDCS_1020_BOTTOM_Y_SKIP;
422
423 y = (hdcs->array.height - HDCS_1020_BOTTOM_Y_SKIP - height) / 2
424 + hdcs->array.top;
425 } else {
426 if (height > hdcs->array.height)
427 height = hdcs->array.height;
428
429 y = hdcs->array.top + (hdcs->array.height - height) / 2;
430 }
431
432 x = hdcs->array.left + (hdcs->array.width - width) / 2;
433
434 win[0] = y / 4;
435 win[1] = x / 4;
436 win[2] = (y + height) / 4 - 1;
437 win[3] = (x + width) / 4 - 1;
438
439 err = hdcs_reg_write_seq(sd, HDCS_FWROW, win, 4);
440 if (err < 0)
441 return err;
442
443 /* Update the current width and height */
444 hdcs->w = width;
445 hdcs->h = height;
446 return err;
447 }
448
449 static int hdcs_probe_1x00(struct sd *sd)
450 {
451 struct hdcs *hdcs;
452 u16 sensor;
453 int ret;
454
455 ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor);
456 if (ret < 0 || sensor != 0x08)
457 return -ENODEV;
458
459 info("HDCS-1000/1100 sensor detected");
460
461 sd->gspca_dev.cam.cam_mode = hdcs1x00_mode;
462 sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1x00_mode);
463 sd->desc.ctrls = hdcs1x00_ctrl;
464 sd->desc.nctrls = ARRAY_SIZE(hdcs1x00_ctrl);
465
466 hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL);
467 if (!hdcs)
468 return -ENOMEM;
469
470 hdcs->array.left = 8;
471 hdcs->array.top = 8;
472 hdcs->array.width = HDCS_1X00_DEF_WIDTH;
473 hdcs->array.height = HDCS_1X00_DEF_HEIGHT;
474 hdcs->array.border = 4;
475
476 hdcs->exp.cto = 4;
477 hdcs->exp.cpo = 2;
478 hdcs->exp.rs = 186;
479 hdcs->exp.er = 100;
480
481 /*
482 * Frame rate on HDCS-1000 with STV600 depends on PSMP:
483 * 4 = doesn't work at all
484 * 5 = 7.8 fps,
485 * 6 = 6.9 fps,
486 * 8 = 6.3 fps,
487 * 10 = 5.5 fps,
488 * 15 = 4.4 fps,
489 * 31 = 2.8 fps
490 *
491 * Frame rate on HDCS-1000 with STV602 depends on PSMP:
492 * 15 = doesn't work at all
493 * 18 = doesn't work at all
494 * 19 = 7.3 fps
495 * 20 = 7.4 fps
496 * 21 = 7.4 fps
497 * 22 = 7.4 fps
498 * 24 = 6.3 fps
499 * 30 = 5.4 fps
500 */
501 hdcs->psmp = (sd->bridge == BRIDGE_STV602) ? 20 : 5;
502
503 sd->sensor_priv = hdcs;
504
505 return 0;
506 }
507
508 static int hdcs_probe_1020(struct sd *sd)
509 {
510 struct hdcs *hdcs;
511 u16 sensor;
512 int ret;
513
514 ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor);
515 if (ret < 0 || sensor != 0x10)
516 return -ENODEV;
517
518 info("HDCS-1020 sensor detected");
519
520 sd->gspca_dev.cam.cam_mode = hdcs1020_mode;
521 sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1020_mode);
522 sd->desc.ctrls = hdcs1020_ctrl;
523 sd->desc.nctrls = ARRAY_SIZE(hdcs1020_ctrl);
524
525 hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL);
526 if (!hdcs)
527 return -ENOMEM;
528
529 /*
530 * From Andrey's test image: looks like HDCS-1020 upper-left
531 * visible pixel is at 24,8 (y maybe even smaller?) and lower-right
532 * visible pixel at 375,299 (x maybe even larger?)
533 */
534 hdcs->array.left = 24;
535 hdcs->array.top = 4;
536 hdcs->array.width = HDCS_1020_DEF_WIDTH;
537 hdcs->array.height = 304;
538 hdcs->array.border = 4;
539
540 hdcs->psmp = 6;
541
542 hdcs->exp.cto = 3;
543 hdcs->exp.cpo = 3;
544 hdcs->exp.rs = 155;
545 hdcs->exp.er = 96;
546
547 sd->sensor_priv = hdcs;
548
549 return 0;
550 }
551
552 static int hdcs_start(struct sd *sd)
553 {
554 PDEBUG(D_STREAM, "Starting stream");
555
556 return hdcs_set_state(sd, HDCS_STATE_RUN);
557 }
558
559 static int hdcs_stop(struct sd *sd)
560 {
561 PDEBUG(D_STREAM, "Halting stream");
562
563 return hdcs_set_state(sd, HDCS_STATE_SLEEP);
564 }
565
566 static void hdcs_disconnect(struct sd *sd)
567 {
568 PDEBUG(D_PROBE, "Disconnecting the sensor");
569 kfree(sd->sensor_priv);
570 }
571
572 static int hdcs_init(struct sd *sd)
573 {
574 struct hdcs *hdcs = sd->sensor_priv;
575 int i, err = 0;
576
577 /* Set the STV0602AA in STV0600 emulation mode */
578 if (sd->bridge == BRIDGE_STV602)
579 stv06xx_write_bridge(sd, STV_STV0600_EMULATION, 1);
580
581 /* Execute the bridge init */
582 for (i = 0; i < ARRAY_SIZE(stv_bridge_init) && !err; i++) {
583 err = stv06xx_write_bridge(sd, stv_bridge_init[i][0],
584 stv_bridge_init[i][1]);
585 }
586 if (err < 0)
587 return err;
588
589 /* sensor soft reset */
590 hdcs_reset(sd);
591
592 /* Execute the sensor init */
593 for (i = 0; i < ARRAY_SIZE(stv_sensor_init) && !err; i++) {
594 err = stv06xx_write_sensor(sd, stv_sensor_init[i][0],
595 stv_sensor_init[i][1]);
596 }
597 if (err < 0)
598 return err;
599
600 /* Enable continous frame capture, bit 2: stop when frame complete */
601 err = stv06xx_write_sensor(sd, HDCS_REG_CONFIG(sd), BIT(3));
602 if (err < 0)
603 return err;
604
605 /* Set PGA sample duration
606 (was 0x7E for the STV602, but caused slow framerate with HDCS-1020) */
607 if (IS_1020(sd))
608 err = stv06xx_write_sensor(sd, HDCS_TCTRL,
609 (HDCS_ADC_START_SIG_DUR << 6) | hdcs->psmp);
610 else
611 err = stv06xx_write_sensor(sd, HDCS_TCTRL,
612 (HDCS_ADC_START_SIG_DUR << 5) | hdcs->psmp);
613 if (err < 0)
614 return err;
615
616 err = hdcs_set_gains(sd, HDCS_DEFAULT_GAIN, HDCS_DEFAULT_GAIN,
617 HDCS_DEFAULT_GAIN);
618 if (err < 0)
619 return err;
620
621 err = hdcs_set_size(sd, hdcs->array.width, hdcs->array.height);
622 if (err < 0)
623 return err;
624
625 err = hdcs_set_exposure(&sd->gspca_dev, HDCS_DEFAULT_EXPOSURE);
626 return err;
627 }
628
629 static int hdcs_dump(struct sd *sd)
630 {
631 u16 reg, val;
632
633 info("Dumping sensor registers:");
634
635 for (reg = HDCS_IDENT; reg <= HDCS_ROWEXPH; reg++) {
636 stv06xx_read_sensor(sd, reg, &val);
637 info("reg 0x%02x = 0x%02x", reg, val);
638 }
639 return 0;
640 }
linux 2.6 git repository for openrd