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Merge remote-tracking branch 'moduleh/module.h-split'
[linux-2.6/next.git] / drivers / media / video / gspca / stv06xx / stv06xx_hdcs.c
blobb8156855f2b759e7df9f934e5540c5d87a68308e
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
167 * as bit 0 toggles r/w */
168 reg += 2;
169 }
170
171 return stv06xx_write_sensor_bytes(sd, regs, len);
172 }
173
174 static int hdcs_set_state(struct sd *sd, enum hdcs_power_state state)
175 {
176 struct hdcs *hdcs = sd->sensor_priv;
177 u8 val;
178 int ret;
179
180 if (hdcs->state == state)
181 return 0;
182
183 /* we need to go idle before running or sleeping */
184 if (hdcs->state != HDCS_STATE_IDLE) {
185 ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0);
186 if (ret)
187 return ret;
188 }
189
190 hdcs->state = HDCS_STATE_IDLE;
191
192 if (state == HDCS_STATE_IDLE)
193 return 0;
194
195 switch (state) {
196 case HDCS_STATE_SLEEP:
197 val = HDCS_SLEEP_MODE;
198 break;
199
200 case HDCS_STATE_RUN:
201 val = HDCS_RUN_ENABLE;
202 break;
203
204 default:
205 return -EINVAL;
206 }
207
208 ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), val);
209
210 /* Update the state if the write succeeded */
211 if (!ret)
212 hdcs->state = state;
213
214 return ret;
215 }
216
217 static int hdcs_reset(struct sd *sd)
218 {
219 struct hdcs *hdcs = sd->sensor_priv;
220 int err;
221
222 err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 1);
223 if (err < 0)
224 return err;
225
226 err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0);
227 if (err < 0)
228 hdcs->state = HDCS_STATE_IDLE;
229
230 return err;
231 }
232
233 static int hdcs_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
234 {
235 struct sd *sd = (struct sd *) gspca_dev;
236 struct hdcs *hdcs = sd->sensor_priv;
237
238 *val = hdcs->exp_cache;
239
240 return 0;
241 }
242
243 static int hdcs_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
244 {
245 struct sd *sd = (struct sd *) gspca_dev;
246 struct hdcs *hdcs = sd->sensor_priv;
247 int rowexp, srowexp;
248 int max_srowexp;
249 /* Column time period */
250 int ct;
251 /* Column processing period */
252 int cp;
253 /* Row processing period */
254 int rp;
255 /* Minimum number of column timing periods
256 within the column processing period */
257 int mnct;
258 int cycles, err;
259 u8 exp[14];
260
261 val &= 0xff;
262 hdcs->exp_cache = val;
263
264 cycles = val * HDCS_CLK_FREQ_MHZ * 257;
265
266 ct = hdcs->exp.cto + hdcs->psmp + (HDCS_ADC_START_SIG_DUR + 2);
267 cp = hdcs->exp.cto + (hdcs->w * ct / 2);
268
269 /* the cycles one row takes */
270 rp = hdcs->exp.rs + cp;
271
272 rowexp = cycles / rp;
273
274 /* the remaining cycles */
275 cycles -= rowexp * rp;
276
277 /* calculate sub-row exposure */
278 if (IS_1020(sd)) {
279 /* see HDCS-1020 datasheet 3.5.6.4, p. 63 */
280 srowexp = hdcs->w - (cycles + hdcs->exp.er + 13) / ct;
281
282 mnct = (hdcs->exp.er + 12 + ct - 1) / ct;
283 max_srowexp = hdcs->w - mnct;
284 } else {
285 /* see HDCS-1000 datasheet 3.4.5.5, p. 61 */
286 srowexp = cp - hdcs->exp.er - 6 - cycles;
287
288 mnct = (hdcs->exp.er + 5 + ct - 1) / ct;
289 max_srowexp = cp - mnct * ct - 1;
290 }
291
292 if (srowexp < 0)
293 srowexp = 0;
294 else if (srowexp > max_srowexp)
295 srowexp = max_srowexp;
296
297 if (IS_1020(sd)) {
298 exp[0] = HDCS20_CONTROL;
299 exp[1] = 0x00; /* Stop streaming */
300 exp[2] = HDCS_ROWEXPL;
301 exp[3] = rowexp & 0xff;
302 exp[4] = HDCS_ROWEXPH;
303 exp[5] = rowexp >> 8;
304 exp[6] = HDCS20_SROWEXP;
305 exp[7] = (srowexp >> 2) & 0xff;
306 exp[8] = HDCS20_ERROR;
307 exp[9] = 0x10; /* Clear exposure error flag*/
308 exp[10] = HDCS20_CONTROL;
309 exp[11] = 0x04; /* Restart streaming */
310 err = stv06xx_write_sensor_bytes(sd, exp, 6);
311 } else {
312 exp[0] = HDCS00_CONTROL;
313 exp[1] = 0x00; /* Stop streaming */
314 exp[2] = HDCS_ROWEXPL;
315 exp[3] = rowexp & 0xff;
316 exp[4] = HDCS_ROWEXPH;
317 exp[5] = rowexp >> 8;
318 exp[6] = HDCS00_SROWEXPL;
319 exp[7] = srowexp & 0xff;
320 exp[8] = HDCS00_SROWEXPH;
321 exp[9] = srowexp >> 8;
322 exp[10] = HDCS_STATUS;
323 exp[11] = 0x10; /* Clear exposure error flag*/
324 exp[12] = HDCS00_CONTROL;
325 exp[13] = 0x04; /* Restart streaming */
326 err = stv06xx_write_sensor_bytes(sd, exp, 7);
327 if (err < 0)
328 return err;
329 }
330 PDEBUG(D_V4L2, "Writing exposure %d, rowexp %d, srowexp %d",
331 val, rowexp, srowexp);
332 return err;
333 }
334
335 static int hdcs_set_gains(struct sd *sd, u8 g)
336 {
337 struct hdcs *hdcs = sd->sensor_priv;
338 int err;
339 u8 gains[4];
340
341 hdcs->gain_cache = g;
342
343 /* the voltage gain Av = (1 + 19 * val / 127) * (1 + bit7) */
344 if (g > 127)
345 g = 0x80 | (g / 2);
346
347 gains[0] = g;
348 gains[1] = g;
349 gains[2] = g;
350 gains[3] = g;
351
352 err = hdcs_reg_write_seq(sd, HDCS_ERECPGA, gains, 4);
353 return err;
354 }
355
356 static int hdcs_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
357 {
358 struct sd *sd = (struct sd *) gspca_dev;
359 struct hdcs *hdcs = sd->sensor_priv;
360
361 *val = hdcs->gain_cache;
362
363 return 0;
364 }
365
366 static int hdcs_set_gain(struct gspca_dev *gspca_dev, __s32 val)
367 {
368 PDEBUG(D_V4L2, "Writing gain %d", val);
369 return hdcs_set_gains((struct sd *) gspca_dev,
370 val & 0xff);
371 }
372
373 static int hdcs_set_size(struct sd *sd,
374 unsigned int width, unsigned int height)
375 {
376 struct hdcs *hdcs = sd->sensor_priv;
377 u8 win[4];
378 unsigned int x, y;
379 int err;
380
381 /* must be multiple of 4 */
382 width = (width + 3) & ~0x3;
383 height = (height + 3) & ~0x3;
384
385 if (width > hdcs->array.width)
386 width = hdcs->array.width;
387
388 if (IS_1020(sd)) {
389 /* the borders are also invalid */
390 if (height + 2 * hdcs->array.border + HDCS_1020_BOTTOM_Y_SKIP
391 > hdcs->array.height)
392 height = hdcs->array.height - 2 * hdcs->array.border -
393 HDCS_1020_BOTTOM_Y_SKIP;
394
395 y = (hdcs->array.height - HDCS_1020_BOTTOM_Y_SKIP - height) / 2
396 + hdcs->array.top;
397 } else {
398 if (height > hdcs->array.height)
399 height = hdcs->array.height;
400
401 y = hdcs->array.top + (hdcs->array.height - height) / 2;
402 }
403
404 x = hdcs->array.left + (hdcs->array.width - width) / 2;
405
406 win[0] = y / 4;
407 win[1] = x / 4;
408 win[2] = (y + height) / 4 - 1;
409 win[3] = (x + width) / 4 - 1;
410
411 err = hdcs_reg_write_seq(sd, HDCS_FWROW, win, 4);
412 if (err < 0)
413 return err;
414
415 /* Update the current width and height */
416 hdcs->w = width;
417 hdcs->h = height;
418 return err;
419 }
420
421 static int hdcs_probe_1x00(struct sd *sd)
422 {
423 struct hdcs *hdcs;
424 u16 sensor;
425 int ret;
426
427 ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor);
428 if (ret < 0 || sensor != 0x08)
429 return -ENODEV;
430
431 info("HDCS-1000/1100 sensor detected");
432
433 sd->gspca_dev.cam.cam_mode = hdcs1x00_mode;
434 sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1x00_mode);
435 sd->desc.ctrls = hdcs1x00_ctrl;
436 sd->desc.nctrls = ARRAY_SIZE(hdcs1x00_ctrl);
437
438 hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL);
439 if (!hdcs)
440 return -ENOMEM;
441
442 hdcs->array.left = 8;
443 hdcs->array.top = 8;
444 hdcs->array.width = HDCS_1X00_DEF_WIDTH;
445 hdcs->array.height = HDCS_1X00_DEF_HEIGHT;
446 hdcs->array.border = 4;
447
448 hdcs->exp.cto = 4;
449 hdcs->exp.cpo = 2;
450 hdcs->exp.rs = 186;
451 hdcs->exp.er = 100;
452
453 /*
454 * Frame rate on HDCS-1000 with STV600 depends on PSMP:
455 * 4 = doesn't work at all
456 * 5 = 7.8 fps,
457 * 6 = 6.9 fps,
458 * 8 = 6.3 fps,
459 * 10 = 5.5 fps,
460 * 15 = 4.4 fps,
461 * 31 = 2.8 fps
462 *
463 * Frame rate on HDCS-1000 with STV602 depends on PSMP:
464 * 15 = doesn't work at all
465 * 18 = doesn't work at all
466 * 19 = 7.3 fps
467 * 20 = 7.4 fps
468 * 21 = 7.4 fps
469 * 22 = 7.4 fps
470 * 24 = 6.3 fps
471 * 30 = 5.4 fps
472 */
473 hdcs->psmp = (sd->bridge == BRIDGE_STV602) ? 20 : 5;
474
475 sd->sensor_priv = hdcs;
476
477 return 0;
478 }
479
480 static int hdcs_probe_1020(struct sd *sd)
481 {
482 struct hdcs *hdcs;
483 u16 sensor;
484 int ret;
485
486 ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor);
487 if (ret < 0 || sensor != 0x10)
488 return -ENODEV;
489
490 info("HDCS-1020 sensor detected");
491
492 sd->gspca_dev.cam.cam_mode = hdcs1020_mode;
493 sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1020_mode);
494 sd->desc.ctrls = hdcs1020_ctrl;
495 sd->desc.nctrls = ARRAY_SIZE(hdcs1020_ctrl);
496
497 hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL);
498 if (!hdcs)
499 return -ENOMEM;
500
501 /*
502 * From Andrey's test image: looks like HDCS-1020 upper-left
503 * visible pixel is at 24,8 (y maybe even smaller?) and lower-right
504 * visible pixel at 375,299 (x maybe even larger?)
505 */
506 hdcs->array.left = 24;
507 hdcs->array.top = 4;
508 hdcs->array.width = HDCS_1020_DEF_WIDTH;
509 hdcs->array.height = 304;
510 hdcs->array.border = 4;
511
512 hdcs->psmp = 6;
513
514 hdcs->exp.cto = 3;
515 hdcs->exp.cpo = 3;
516 hdcs->exp.rs = 155;
517 hdcs->exp.er = 96;
518
519 sd->sensor_priv = hdcs;
520
521 return 0;
522 }
523
524 static int hdcs_start(struct sd *sd)
525 {
526 PDEBUG(D_STREAM, "Starting stream");
527
528 return hdcs_set_state(sd, HDCS_STATE_RUN);
529 }
530
531 static int hdcs_stop(struct sd *sd)
532 {
533 PDEBUG(D_STREAM, "Halting stream");
534
535 return hdcs_set_state(sd, HDCS_STATE_SLEEP);
536 }
537
538 static void hdcs_disconnect(struct sd *sd)
539 {
540 PDEBUG(D_PROBE, "Disconnecting the sensor");
541 kfree(sd->sensor_priv);
542 }
543
544 static int hdcs_init(struct sd *sd)
545 {
546 struct hdcs *hdcs = sd->sensor_priv;
547 int i, err = 0;
548
549 /* Set the STV0602AA in STV0600 emulation mode */
550 if (sd->bridge == BRIDGE_STV602)
551 stv06xx_write_bridge(sd, STV_STV0600_EMULATION, 1);
552
553 /* Execute the bridge init */
554 for (i = 0; i < ARRAY_SIZE(stv_bridge_init) && !err; i++) {
555 err = stv06xx_write_bridge(sd, stv_bridge_init[i][0],
556 stv_bridge_init[i][1]);
557 }
558 if (err < 0)
559 return err;
560
561 /* sensor soft reset */
562 hdcs_reset(sd);
563
564 /* Execute the sensor init */
565 for (i = 0; i < ARRAY_SIZE(stv_sensor_init) && !err; i++) {
566 err = stv06xx_write_sensor(sd, stv_sensor_init[i][0],
567 stv_sensor_init[i][1]);
568 }
569 if (err < 0)
570 return err;
571
572 /* Enable continuous frame capture, bit 2: stop when frame complete */
573 err = stv06xx_write_sensor(sd, HDCS_REG_CONFIG(sd), BIT(3));
574 if (err < 0)
575 return err;
576
577 /* Set PGA sample duration
578 (was 0x7E for the STV602, but caused slow framerate with HDCS-1020) */
579 if (IS_1020(sd))
580 err = stv06xx_write_sensor(sd, HDCS_TCTRL,
581 (HDCS_ADC_START_SIG_DUR << 6) | hdcs->psmp);
582 else
583 err = stv06xx_write_sensor(sd, HDCS_TCTRL,
584 (HDCS_ADC_START_SIG_DUR << 5) | hdcs->psmp);
585 if (err < 0)
586 return err;
587
588 err = hdcs_set_gains(sd, HDCS_DEFAULT_GAIN);
589 if (err < 0)
590 return err;
591
592 err = hdcs_set_size(sd, hdcs->array.width, hdcs->array.height);
593 if (err < 0)
594 return err;
595
596 err = hdcs_set_exposure(&sd->gspca_dev, HDCS_DEFAULT_EXPOSURE);
597 return err;
598 }
599
600 static int hdcs_dump(struct sd *sd)
601 {
602 u16 reg, val;
603
604 info("Dumping sensor registers:");
605
606 for (reg = HDCS_IDENT; reg <= HDCS_ROWEXPH; reg++) {
607 stv06xx_read_sensor(sd, reg, &val);
608 info("reg 0x%02x = 0x%02x", reg, val);
609 }
610 return 0;
611 }
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