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OMAP3 SRF: Generic shared resource f/w
[linux-ginger.git] / drivers / media / video / gspca / stv06xx / stv06xx_hdcs.c
blob706e08dc5254662a3baccb87ef4983aad8ad03b3
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 = 0xff,
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 u8 exp_cache, gain_cache;
152 };
153
154 static int hdcs_reg_write_seq(struct sd *sd, u8 reg, u8 *vals, u8 len)
155 {
156 u8 regs[I2C_MAX_BYTES * 2];
157 int i;
158
159 if (unlikely((len <= 0) || (len >= I2C_MAX_BYTES) ||
160 (reg + len > 0xff)))
161 return -EINVAL;
162
163 for (i = 0; i < len; i++) {
164 regs[2 * i] = reg;
165 regs[2 * i + 1] = vals[i];
166 /* All addresses are shifted left one bit as bit 0 toggles r/w */
167 reg += 2;
168 }
169
170 return stv06xx_write_sensor_bytes(sd, regs, len);
171 }
172
173 static int hdcs_set_state(struct sd *sd, enum hdcs_power_state state)
174 {
175 struct hdcs *hdcs = sd->sensor_priv;
176 u8 val;
177 int ret;
178
179 if (hdcs->state == state)
180 return 0;
181
182 /* we need to go idle before running or sleeping */
183 if (hdcs->state != HDCS_STATE_IDLE) {
184 ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0);
185 if (ret)
186 return ret;
187 }
188
189 hdcs->state = HDCS_STATE_IDLE;
190
191 if (state == HDCS_STATE_IDLE)
192 return 0;
193
194 switch (state) {
195 case HDCS_STATE_SLEEP:
196 val = HDCS_SLEEP_MODE;
197 break;
198
199 case HDCS_STATE_RUN:
200 val = HDCS_RUN_ENABLE;
201 break;
202
203 default:
204 return -EINVAL;
205 }
206
207 ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), val);
208
209 /* Update the state if the write succeeded */
210 if (!ret)
211 hdcs->state = state;
212
213 return ret;
214 }
215
216 static int hdcs_reset(struct sd *sd)
217 {
218 struct hdcs *hdcs = sd->sensor_priv;
219 int err;
220
221 err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 1);
222 if (err < 0)
223 return err;
224
225 err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0);
226 if (err < 0)
227 hdcs->state = HDCS_STATE_IDLE;
228
229 return err;
230 }
231
232 static int hdcs_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
233 {
234 struct sd *sd = (struct sd *) gspca_dev;
235 struct hdcs *hdcs = sd->sensor_priv;
236
237 *val = hdcs->exp_cache;
238
239 return 0;
240 }
241
242 static int hdcs_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
243 {
244 struct sd *sd = (struct sd *) gspca_dev;
245 struct hdcs *hdcs = sd->sensor_priv;
246 int rowexp, srowexp;
247 int max_srowexp;
248 /* Column time period */
249 int ct;
250 /* Column processing period */
251 int cp;
252 /* Row processing period */
253 int rp;
254 /* Minimum number of column timing periods
255 within the column processing period */
256 int mnct;
257 int cycles, err;
258 u8 exp[14];
259
260 val &= 0xff;
261 hdcs->exp_cache = val;
262
263 cycles = val * HDCS_CLK_FREQ_MHZ * 257;
264
265 ct = hdcs->exp.cto + hdcs->psmp + (HDCS_ADC_START_SIG_DUR + 2);
266 cp = hdcs->exp.cto + (hdcs->w * ct / 2);
267
268 /* the cycles one row takes */
269 rp = hdcs->exp.rs + cp;
270
271 rowexp = cycles / rp;
272
273 /* the remaining cycles */
274 cycles -= rowexp * rp;
275
276 /* calculate sub-row exposure */
277 if (IS_1020(sd)) {
278 /* see HDCS-1020 datasheet 3.5.6.4, p. 63 */
279 srowexp = hdcs->w - (cycles + hdcs->exp.er + 13) / ct;
280
281 mnct = (hdcs->exp.er + 12 + ct - 1) / ct;
282 max_srowexp = hdcs->w - mnct;
283 } else {
284 /* see HDCS-1000 datasheet 3.4.5.5, p. 61 */
285 srowexp = cp - hdcs->exp.er - 6 - cycles;
286
287 mnct = (hdcs->exp.er + 5 + ct - 1) / ct;
288 max_srowexp = cp - mnct * ct - 1;
289 }
290
291 if (srowexp < 0)
292 srowexp = 0;
293 else if (srowexp > max_srowexp)
294 srowexp = max_srowexp;
295
296 if (IS_1020(sd)) {
297 exp[0] = HDCS20_CONTROL;
298 exp[1] = 0x00; /* Stop streaming */
299 exp[2] = HDCS_ROWEXPL;
300 exp[3] = rowexp & 0xff;
301 exp[4] = HDCS_ROWEXPH;
302 exp[5] = rowexp >> 8;
303 exp[6] = HDCS20_SROWEXP;
304 exp[7] = (srowexp >> 2) & 0xff;
305 exp[8] = HDCS20_ERROR;
306 exp[9] = 0x10; /* Clear exposure error flag*/
307 exp[10] = HDCS20_CONTROL;
308 exp[11] = 0x04; /* Restart streaming */
309 err = stv06xx_write_sensor_bytes(sd, exp, 6);
310 } else {
311 exp[0] = HDCS00_CONTROL;
312 exp[1] = 0x00; /* Stop streaming */
313 exp[2] = HDCS_ROWEXPL;
314 exp[3] = rowexp & 0xff;
315 exp[4] = HDCS_ROWEXPH;
316 exp[5] = rowexp >> 8;
317 exp[6] = HDCS00_SROWEXPL;
318 exp[7] = srowexp & 0xff;
319 exp[8] = HDCS00_SROWEXPH;
320 exp[9] = srowexp >> 8;
321 exp[10] = HDCS_STATUS;
322 exp[11] = 0x10; /* Clear exposure error flag*/
323 exp[12] = HDCS00_CONTROL;
324 exp[13] = 0x04; /* Restart streaming */
325 err = stv06xx_write_sensor_bytes(sd, exp, 7);
326 if (err < 0)
327 return err;
328 }
329 PDEBUG(D_V4L2, "Writing exposure %d, rowexp %d, srowexp %d",
330 val, rowexp, srowexp);
331 return err;
332 }
333
334 static int hdcs_set_gains(struct sd *sd, u8 g)
335 {
336 struct hdcs *hdcs = sd->sensor_priv;
337 int err;
338 u8 gains[4];
339
340 hdcs->gain_cache = g;
341
342 /* the voltage gain Av = (1 + 19 * val / 127) * (1 + bit7) */
343 if (g > 127)
344 g = 0x80 | (g / 2);
345
346 gains[0] = g;
347 gains[1] = g;
348 gains[2] = g;
349 gains[3] = g;
350
351 err = hdcs_reg_write_seq(sd, HDCS_ERECPGA, gains, 4);
352 return err;
353 }
354
355 static int hdcs_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
356 {
357 struct sd *sd = (struct sd *) gspca_dev;
358 struct hdcs *hdcs = sd->sensor_priv;
359
360 *val = hdcs->gain_cache;
361
362 return 0;
363 }
364
365 static int hdcs_set_gain(struct gspca_dev *gspca_dev, __s32 val)
366 {
367 PDEBUG(D_V4L2, "Writing gain %d", val);
368 return hdcs_set_gains((struct sd *) gspca_dev,
369 val & 0xff);
370 }
371
372 static int hdcs_set_size(struct sd *sd,
373 unsigned int width, unsigned int height)
374 {
375 struct hdcs *hdcs = sd->sensor_priv;
376 u8 win[4];
377 unsigned int x, y;
378 int err;
379
380 /* must be multiple of 4 */
381 width = (width + 3) & ~0x3;
382 height = (height + 3) & ~0x3;
383
384 if (width > hdcs->array.width)
385 width = hdcs->array.width;
386
387 if (IS_1020(sd)) {
388 /* the borders are also invalid */
389 if (height + 2 * hdcs->array.border + HDCS_1020_BOTTOM_Y_SKIP
390 > hdcs->array.height)
391 height = hdcs->array.height - 2 * hdcs->array.border -
392 HDCS_1020_BOTTOM_Y_SKIP;
393
394 y = (hdcs->array.height - HDCS_1020_BOTTOM_Y_SKIP - height) / 2
395 + hdcs->array.top;
396 } else {
397 if (height > hdcs->array.height)
398 height = hdcs->array.height;
399
400 y = hdcs->array.top + (hdcs->array.height - height) / 2;
401 }
402
403 x = hdcs->array.left + (hdcs->array.width - width) / 2;
404
405 win[0] = y / 4;
406 win[1] = x / 4;
407 win[2] = (y + height) / 4 - 1;
408 win[3] = (x + width) / 4 - 1;
409
410 err = hdcs_reg_write_seq(sd, HDCS_FWROW, win, 4);
411 if (err < 0)
412 return err;
413
414 /* Update the current width and height */
415 hdcs->w = width;
416 hdcs->h = height;
417 return err;
418 }
419
420 static int hdcs_probe_1x00(struct sd *sd)
421 {
422 struct hdcs *hdcs;
423 u16 sensor;
424 int ret;
425
426 ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor);
427 if (ret < 0 || sensor != 0x08)
428 return -ENODEV;
429
430 info("HDCS-1000/1100 sensor detected");
431
432 sd->gspca_dev.cam.cam_mode = hdcs1x00_mode;
433 sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1x00_mode);
434 sd->desc.ctrls = hdcs1x00_ctrl;
435 sd->desc.nctrls = ARRAY_SIZE(hdcs1x00_ctrl);
436
437 hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL);
438 if (!hdcs)
439 return -ENOMEM;
440
441 hdcs->array.left = 8;
442 hdcs->array.top = 8;
443 hdcs->array.width = HDCS_1X00_DEF_WIDTH;
444 hdcs->array.height = HDCS_1X00_DEF_HEIGHT;
445 hdcs->array.border = 4;
446
447 hdcs->exp.cto = 4;
448 hdcs->exp.cpo = 2;
449 hdcs->exp.rs = 186;
450 hdcs->exp.er = 100;
451
452 /*
453 * Frame rate on HDCS-1000 with STV600 depends on PSMP:
454 * 4 = doesn't work at all
455 * 5 = 7.8 fps,
456 * 6 = 6.9 fps,
457 * 8 = 6.3 fps,
458 * 10 = 5.5 fps,
459 * 15 = 4.4 fps,
460 * 31 = 2.8 fps
461 *
462 * Frame rate on HDCS-1000 with STV602 depends on PSMP:
463 * 15 = doesn't work at all
464 * 18 = doesn't work at all
465 * 19 = 7.3 fps
466 * 20 = 7.4 fps
467 * 21 = 7.4 fps
468 * 22 = 7.4 fps
469 * 24 = 6.3 fps
470 * 30 = 5.4 fps
471 */
472 hdcs->psmp = (sd->bridge == BRIDGE_STV602) ? 20 : 5;
473
474 sd->sensor_priv = hdcs;
475
476 return 0;
477 }
478
479 static int hdcs_probe_1020(struct sd *sd)
480 {
481 struct hdcs *hdcs;
482 u16 sensor;
483 int ret;
484
485 ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor);
486 if (ret < 0 || sensor != 0x10)
487 return -ENODEV;
488
489 info("HDCS-1020 sensor detected");
490
491 sd->gspca_dev.cam.cam_mode = hdcs1020_mode;
492 sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1020_mode);
493 sd->desc.ctrls = hdcs1020_ctrl;
494 sd->desc.nctrls = ARRAY_SIZE(hdcs1020_ctrl);
495
496 hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL);
497 if (!hdcs)
498 return -ENOMEM;
499
500 /*
501 * From Andrey's test image: looks like HDCS-1020 upper-left
502 * visible pixel is at 24,8 (y maybe even smaller?) and lower-right
503 * visible pixel at 375,299 (x maybe even larger?)
504 */
505 hdcs->array.left = 24;
506 hdcs->array.top = 4;
507 hdcs->array.width = HDCS_1020_DEF_WIDTH;
508 hdcs->array.height = 304;
509 hdcs->array.border = 4;
510
511 hdcs->psmp = 6;
512
513 hdcs->exp.cto = 3;
514 hdcs->exp.cpo = 3;
515 hdcs->exp.rs = 155;
516 hdcs->exp.er = 96;
517
518 sd->sensor_priv = hdcs;
519
520 return 0;
521 }
522
523 static int hdcs_start(struct sd *sd)
524 {
525 PDEBUG(D_STREAM, "Starting stream");
526
527 return hdcs_set_state(sd, HDCS_STATE_RUN);
528 }
529
530 static int hdcs_stop(struct sd *sd)
531 {
532 PDEBUG(D_STREAM, "Halting stream");
533
534 return hdcs_set_state(sd, HDCS_STATE_SLEEP);
535 }
536
537 static void hdcs_disconnect(struct sd *sd)
538 {
539 PDEBUG(D_PROBE, "Disconnecting the sensor");
540 kfree(sd->sensor_priv);
541 }
542
543 static int hdcs_init(struct sd *sd)
544 {
545 struct hdcs *hdcs = sd->sensor_priv;
546 int i, err = 0;
547
548 /* Set the STV0602AA in STV0600 emulation mode */
549 if (sd->bridge == BRIDGE_STV602)
550 stv06xx_write_bridge(sd, STV_STV0600_EMULATION, 1);
551
552 /* Execute the bridge init */
553 for (i = 0; i < ARRAY_SIZE(stv_bridge_init) && !err; i++) {
554 err = stv06xx_write_bridge(sd, stv_bridge_init[i][0],
555 stv_bridge_init[i][1]);
556 }
557 if (err < 0)
558 return err;
559
560 /* sensor soft reset */
561 hdcs_reset(sd);
562
563 /* Execute the sensor init */
564 for (i = 0; i < ARRAY_SIZE(stv_sensor_init) && !err; i++) {
565 err = stv06xx_write_sensor(sd, stv_sensor_init[i][0],
566 stv_sensor_init[i][1]);
567 }
568 if (err < 0)
569 return err;
570
571 /* Enable continous frame capture, bit 2: stop when frame complete */
572 err = stv06xx_write_sensor(sd, HDCS_REG_CONFIG(sd), BIT(3));
573 if (err < 0)
574 return err;
575
576 /* Set PGA sample duration
577 (was 0x7E for the STV602, but caused slow framerate with HDCS-1020) */
578 if (IS_1020(sd))
579 err = stv06xx_write_sensor(sd, HDCS_TCTRL,
580 (HDCS_ADC_START_SIG_DUR << 6) | hdcs->psmp);
581 else
582 err = stv06xx_write_sensor(sd, HDCS_TCTRL,
583 (HDCS_ADC_START_SIG_DUR << 5) | hdcs->psmp);
584 if (err < 0)
585 return err;
586
587 err = hdcs_set_gains(sd, HDCS_DEFAULT_GAIN);
588 if (err < 0)
589 return err;
590
591 err = hdcs_set_size(sd, hdcs->array.width, hdcs->array.height);
592 if (err < 0)
593 return err;
594
595 err = hdcs_set_exposure(&sd->gspca_dev, HDCS_DEFAULT_EXPOSURE);
596 return err;
597 }
598
599 static int hdcs_dump(struct sd *sd)
600 {
601 u16 reg, val;
602
603 info("Dumping sensor registers:");
604
605 for (reg = HDCS_IDENT; reg <= HDCS_ROWEXPH; reg++) {
606 stv06xx_read_sensor(sd, reg, &val);
607 info("reg 0x%02x = 0x%02x", reg, val);
608 }
609 return 0;
610 }
Linux for Ginger Game Console