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V4L/DVB (12082): gspca_stv06xx: Add support for st6422 bridge and sensor
[mirror_ubuntu-artful-kernel.git] / drivers / media / video / gspca / stv06xx / stv06xx_hdcs.c
CommitLineData
4c98834a
EA		 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
766231ab
EA		 33static 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
63static struct v4l2_pix_format hdcs1x00_mode[] = {
64 {
65 HDCS_1X00_DEF_WIDTH,
66 HDCS_1X00_DEF_HEIGHT,
67 V4L2_PIX_FMT_SBGGR8,
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
77static const struct ctrl hdcs1020_ctrl[] = {};
78
79static struct v4l2_pix_format hdcs1020_mode[] = {
80 {
81 HDCS_1020_DEF_WIDTH,
82 HDCS_1020_DEF_HEIGHT,
83 V4L2_PIX_FMT_SBGGR8,
84 V4L2_FIELD_NONE,
85 .sizeimage =
86 HDCS_1020_DEF_WIDTH * HDCS_1020_DEF_HEIGHT,
87 .bytesperline = HDCS_1020_DEF_WIDTH,
88 .colorspace = V4L2_COLORSPACE_SRGB,
89 .priv = 1
90 }
91};
92
4c98834a
EA		 93enum hdcs_power_state {
94 HDCS_STATE_SLEEP,
95 HDCS_STATE_IDLE,
96 HDCS_STATE_RUN
97};
98
99/* no lock? */
100struct hdcs {
101 enum hdcs_power_state state;
102 int w, h;
103
104 /* visible area of the sensor array */
105 struct {
106 int left, top;
107 int width, height;
108 int border;
109 } array;
110
111 struct {
112 /* Column timing overhead */
113 u8 cto;
114 /* Column processing overhead */
115 u8 cpo;
116 /* Row sample period constant */
117 u16 rs;
118 /* Exposure reset duration */
119 u16 er;
120 } exp;
121
122 int psmp;
123};
124
125static int hdcs_reg_write_seq(struct sd *sd, u8 reg, u8 *vals, u8 len)
126{
127 u8 regs[I2C_MAX_BYTES * 2];
128 int i;
129
130 if (unlikely((len <= 0) || (len >= I2C_MAX_BYTES) ||
131 (reg + len > 0xff)))
132 return -EINVAL;
133
134 for (i = 0; i < len; i++, reg++) {
135 regs[2*i] = reg;
136 regs[2*i+1] = vals[i];
137 }
138
139 return stv06xx_write_sensor_bytes(sd, regs, len);
140}
141
142static int hdcs_set_state(struct sd *sd, enum hdcs_power_state state)
143{
144 struct hdcs *hdcs = sd->sensor_priv;
145 u8 val;
146 int ret;
147
148 if (hdcs->state == state)
149 return 0;
150
151 /* we need to go idle before running or sleeping */
152 if (hdcs->state != HDCS_STATE_IDLE) {
153 ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0);
154 if (ret)
155 return ret;
156 }
157
158 hdcs->state = HDCS_STATE_IDLE;
159
160 if (state == HDCS_STATE_IDLE)
161 return 0;
162
163 switch (state) {
164 case HDCS_STATE_SLEEP:
165 val = HDCS_SLEEP_MODE;
166 break;
167
168 case HDCS_STATE_RUN:
169 val = HDCS_RUN_ENABLE;
170 break;
171
172 default:
173 return -EINVAL;
174 }
175
176 ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), val);
177 if (ret < 0)
178 hdcs->state = state;
179
180 return ret;
181}
182
183static int hdcs_reset(struct sd *sd)
184{
185 struct hdcs *hdcs = sd->sensor_priv;
186 int err;
187
188 err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 1);
189 if (err < 0)
190 return err;
191
192 err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0);
193 if (err < 0)
194 hdcs->state = HDCS_STATE_IDLE;
195
196 return err;
197}
198
199static int hdcs_get_exposure(struct gspca_dev *gspca_dev, __s32 *val)
200{
201 struct sd *sd = (struct sd *) gspca_dev;
202 struct hdcs *hdcs = sd->sensor_priv;
203
204 /* Column time period */
205 int ct;
206 /* Column processing period */
207 int cp;
208 /* Row processing period */
209 int rp;
210 int cycles;
211 int err;
212 int rowexp;
213 u16 data[2];
214
215 err = stv06xx_read_sensor(sd, HDCS_ROWEXPL, &data[0]);
216 if (err < 0)
217 return err;
218
219 err = stv06xx_read_sensor(sd, HDCS_ROWEXPH, &data[1]);
220 if (err < 0)
221 return err;
222
223 rowexp = (data[1] << 8) | data[0];
224
225 ct = hdcs->exp.cto + hdcs->psmp + (HDCS_ADC_START_SIG_DUR + 2);
226 cp = hdcs->exp.cto + (hdcs->w * ct / 2);
227 rp = hdcs->exp.rs + cp;
228
229 cycles = rp * rowexp;
230 *val = cycles / HDCS_CLK_FREQ_MHZ;
231 PDEBUG(D_V4L2, "Read exposure %d", *val);
232 return 0;
233}
234
235static int hdcs_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
236{
237 struct sd *sd = (struct sd *) gspca_dev;
238 struct hdcs *hdcs = sd->sensor_priv;
239 int rowexp, srowexp;
240 int max_srowexp;
241 /* Column time period */
242 int ct;
243 /* Column processing period */
244 int cp;
245 /* Row processing period */
246 int rp;
247 /* Minimum number of column timing periods
248 within the column processing period */
249 int mnct;
250 int cycles, err;
251 u8 exp[4];
252
253 cycles = val * HDCS_CLK_FREQ_MHZ;
254
255 ct = hdcs->exp.cto + hdcs->psmp + (HDCS_ADC_START_SIG_DUR + 2);
256 cp = hdcs->exp.cto + (hdcs->w * ct / 2);
257
258 /* the cycles one row takes */
259 rp = hdcs->exp.rs + cp;
260
261 rowexp = cycles / rp;
262
263 /* the remaining cycles */
264 cycles -= rowexp * rp;
265
266 /* calculate sub-row exposure */
267 if (IS_1020(sd)) {
268 /* see HDCS-1020 datasheet 3.5.6.4, p. 63 */
269 srowexp = hdcs->w - (cycles + hdcs->exp.er + 13) / ct;
270
271 mnct = (hdcs->exp.er + 12 + ct - 1) / ct;
272 max_srowexp = hdcs->w - mnct;
273 } else {
274 /* see HDCS-1000 datasheet 3.4.5.5, p. 61 */
275 srowexp = cp - hdcs->exp.er - 6 - cycles;
276
277 mnct = (hdcs->exp.er + 5 + ct - 1) / ct;
278 max_srowexp = cp - mnct * ct - 1;
279 }
280
281 if (srowexp < 0)
282 srowexp = 0;
283 else if (srowexp > max_srowexp)
284 srowexp = max_srowexp;
285
286 if (IS_1020(sd)) {
287 exp[0] = rowexp & 0xff;
288 exp[1] = rowexp >> 8;
289 exp[2] = (srowexp >> 2) & 0xff;
290 /* this clears exposure error flag */
291 exp[3] = 0x1;
292 err = hdcs_reg_write_seq(sd, HDCS_ROWEXPL, exp, 4);
293 } else {
294 exp[0] = rowexp & 0xff;
295 exp[1] = rowexp >> 8;
296 exp[2] = srowexp & 0xff;
297 exp[3] = srowexp >> 8;
298 err = hdcs_reg_write_seq(sd, HDCS_ROWEXPL, exp, 4);
299 if (err < 0)
300 return err;
301
302 /* clear exposure error flag */
303 err = stv06xx_write_sensor(sd,
304 HDCS_STATUS, BIT(4));
305 }
306 PDEBUG(D_V4L2, "Writing exposure %d, rowexp %d, srowexp %d",
307 val, rowexp, srowexp);
308 return err;
309}
310
311static int hdcs_set_gains(struct sd *sd, u8 r, u8 g, u8 b)
312{
313 u8 gains[4];
314
315 /* the voltage gain Av = (1 + 19 * val / 127) * (1 + bit7) */
316 if (r > 127)
317 r = 0x80 | (r / 2);
318 if (g > 127)
319 g = 0x80 | (g / 2);
320 if (b > 127)
321 b = 0x80 | (b / 2);
322
323 gains[0] = g;
324 gains[1] = r;
325 gains[2] = b;
326 gains[3] = g;
327
328 return hdcs_reg_write_seq(sd, HDCS_ERECPGA, gains, 4);
329}
330
331static int hdcs_get_gain(struct gspca_dev *gspca_dev, __s32 *val)
332{
333 struct sd *sd = (struct sd *) gspca_dev;
334 int err;
335 u16 data;
336
337 err = stv06xx_read_sensor(sd, HDCS_ERECPGA, &data);
338
339 /* Bit 7 doubles the gain */
340 if (data & 0x80)
341 *val = (data & 0x7f) * 2;
342 else
343 *val = data;
344
345 PDEBUG(D_V4L2, "Read gain %d", *val);
346 return err;
347}
348
349static int hdcs_set_gain(struct gspca_dev *gspca_dev, __s32 val)
350{
351 PDEBUG(D_V4L2, "Writing gain %d", val);
352 return hdcs_set_gains((struct sd *) gspca_dev,
353 val & 0xff, val & 0xff, val & 0xff);
354}
355
356static int hdcs_set_size(struct sd *sd,
357 unsigned int width, unsigned int height)
358{
359 struct hdcs *hdcs = sd->sensor_priv;
360 u8 win[4];
361 unsigned int x, y;
362 int err;
363
364 /* must be multiple of 4 */
365 width = (width + 3) & ~0x3;
366 height = (height + 3) & ~0x3;
367
368 if (width > hdcs->array.width)
369 width = hdcs->array.width;
370
371 if (IS_1020(sd)) {
372 /* the borders are also invalid */
373 if (height + 2 * hdcs->array.border + HDCS_1020_BOTTOM_Y_SKIP
374 > hdcs->array.height)
375 height = hdcs->array.height - 2 * hdcs->array.border -
376 HDCS_1020_BOTTOM_Y_SKIP;
377
378 y = (hdcs->array.height - HDCS_1020_BOTTOM_Y_SKIP - height) / 2
379 + hdcs->array.top;
1970f14f
EA		 380 } else {
381 if (height > hdcs->array.height)
382 height = hdcs->array.height;
383
4c98834a
EA		 384 y = hdcs->array.top + (hdcs->array.height - height) / 2;
385 }
386
387 x = hdcs->array.left + (hdcs->array.width - width) / 2;
388
389 win[0] = y / 4;
390 win[1] = x / 4;
391 win[2] = (y + height) / 4 - 1;
392 win[3] = (x + width) / 4 - 1;
393
394 err = hdcs_reg_write_seq(sd, HDCS_FWROW, win, 4);
395 if (err < 0)
396 return err;
397
398 /* Update the current width and height */
399 hdcs->w = width;
400 hdcs->h = height;
401 return err;
402}
403
404static int hdcs_probe_1x00(struct sd *sd)
405{
406 struct hdcs *hdcs;
407 u16 sensor;
408 int ret;
409
410 ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor);
411 if (ret < 0 || sensor != 0x08)
412 return -ENODEV;
413
414 info("HDCS-1000/1100 sensor detected");
415
766231ab
EA		 416 sd->gspca_dev.cam.cam_mode = hdcs1x00_mode;
417 sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1x00_mode);
418 sd->desc.ctrls = hdcs1x00_ctrl;
419 sd->desc.nctrls = ARRAY_SIZE(hdcs1x00_ctrl);
4c98834a
EA		 420
421 hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL);
422 if (!hdcs)
423 return -ENOMEM;
424
425 hdcs->array.left = 8;
426 hdcs->array.top = 8;
427 hdcs->array.width = HDCS_1X00_DEF_WIDTH;
428 hdcs->array.height = HDCS_1X00_DEF_HEIGHT;
429 hdcs->array.border = 4;
430
431 hdcs->exp.cto = 4;
432 hdcs->exp.cpo = 2;
433 hdcs->exp.rs = 186;
434 hdcs->exp.er = 100;
435
436 /*
8668d504 437 * Frame rate on HDCS-1000 with STV600 depends on PSMP:
4c98834a
EA		 438 * 4 = doesn't work at all
439 * 5 = 7.8 fps,
440 * 6 = 6.9 fps,
441 * 8 = 6.3 fps,
442 * 10 = 5.5 fps,
443 * 15 = 4.4 fps,
444 * 31 = 2.8 fps
445 *
8668d504 446 * Frame rate on HDCS-1000 with STV602 depends on PSMP:
4c98834a
EA		 447 * 15 = doesn't work at all
448 * 18 = doesn't work at all
449 * 19 = 7.3 fps
450 * 20 = 7.4 fps
451 * 21 = 7.4 fps
452 * 22 = 7.4 fps
453 * 24 = 6.3 fps
454 * 30 = 5.4 fps
455 */
8668d504 456 hdcs->psmp = (sd->bridge == BRIDGE_STV602) ? 20 : 5;
4c98834a
EA		 457
458 sd->sensor_priv = hdcs;
459
460 return 0;
461}
462
463static int hdcs_probe_1020(struct sd *sd)
464{
465 struct hdcs *hdcs;
466 u16 sensor;
467 int ret;
468
469 ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor);
470 if (ret < 0 || sensor != 0x10)
471 return -ENODEV;
472
473 info("HDCS-1020 sensor detected");
474
766231ab
EA		 475 sd->gspca_dev.cam.cam_mode = hdcs1020_mode;
476 sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1020_mode);
477 sd->desc.ctrls = hdcs1020_ctrl;
478 sd->desc.nctrls = ARRAY_SIZE(hdcs1020_ctrl);
4c98834a
EA		 479
480 hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL);
481 if (!hdcs)
482 return -ENOMEM;
483
484 /*
485 * From Andrey's test image: looks like HDCS-1020 upper-left
486 * visible pixel is at 24,8 (y maybe even smaller?) and lower-right
487 * visible pixel at 375,299 (x maybe even larger?)
488 */
489 hdcs->array.left = 24;
490 hdcs->array.top = 4;
491 hdcs->array.width = HDCS_1020_DEF_WIDTH;
492 hdcs->array.height = 304;
493 hdcs->array.border = 4;
494
495 hdcs->psmp = 6;
496
497 hdcs->exp.cto = 3;
498 hdcs->exp.cpo = 3;
499 hdcs->exp.rs = 155;
500 hdcs->exp.er = 96;
501
502 sd->sensor_priv = hdcs;
503
504 return 0;
505}
506
507static int hdcs_start(struct sd *sd)
508{
509 PDEBUG(D_STREAM, "Starting stream");
510
511 return hdcs_set_state(sd, HDCS_STATE_RUN);
512}
513
514static int hdcs_stop(struct sd *sd)
515{
516 PDEBUG(D_STREAM, "Halting stream");
517
518 return hdcs_set_state(sd, HDCS_STATE_SLEEP);
519}
520
521static void hdcs_disconnect(struct sd *sd)
522{
523 PDEBUG(D_PROBE, "Disconnecting the sensor");
524 kfree(sd->sensor_priv);
525}
526
527static int hdcs_init(struct sd *sd)
528{
529 struct hdcs *hdcs = sd->sensor_priv;
530 int i, err = 0;
531
532 /* Set the STV0602AA in STV0600 emulation mode */
8668d504 533 if (sd->bridge == BRIDGE_STV602)
4c98834a
EA		 534 stv06xx_write_bridge(sd, STV_STV0600_EMULATION, 1);
535
536 /* Execute the bridge init */
537 for (i = 0; i < ARRAY_SIZE(stv_bridge_init) && !err; i++) {
538 err = stv06xx_write_bridge(sd, stv_bridge_init[i][0],
539 stv_bridge_init[i][1]);
540 }
541 if (err < 0)
542 return err;
543
544 /* sensor soft reset */
545 hdcs_reset(sd);
546
547 /* Execute the sensor init */
548 for (i = 0; i < ARRAY_SIZE(stv_sensor_init) && !err; i++) {
549 err = stv06xx_write_sensor(sd, stv_sensor_init[i][0],
550 stv_sensor_init[i][1]);
551 }
552 if (err < 0)
553 return err;
554
555 /* Enable continous frame capture, bit 2: stop when frame complete */
556 err = stv06xx_write_sensor(sd, HDCS_REG_CONFIG(sd), BIT(3));
557 if (err < 0)
558 return err;
559
560 /* Set PGA sample duration
8668d504 561 (was 0x7E for the STV602, but caused slow framerate with HDCS-1020) */
4c98834a
EA		 562 if (IS_1020(sd))
563 err = stv06xx_write_sensor(sd, HDCS_TCTRL,
564 (HDCS_ADC_START_SIG_DUR << 6) | hdcs->psmp);
565 else
566 err = stv06xx_write_sensor(sd, HDCS_TCTRL,
567 (HDCS_ADC_START_SIG_DUR << 5) | hdcs->psmp);
568 if (err < 0)
569 return err;
570
571 err = hdcs_set_gains(sd, HDCS_DEFAULT_GAIN, HDCS_DEFAULT_GAIN,
572 HDCS_DEFAULT_GAIN);
573 if (err < 0)
574 return err;
575
576 err = hdcs_set_exposure(&sd->gspca_dev, HDCS_DEFAULT_EXPOSURE);
577 if (err < 0)
578 return err;
579
580 err = hdcs_set_size(sd, hdcs->array.width, hdcs->array.height);
581 return err;
582}
583
584static int hdcs_dump(struct sd *sd)
585{
586 u16 reg, val;
587
588 info("Dumping sensor registers:");
589
590 for (reg = HDCS_IDENT; reg <= HDCS_ROWEXPH; reg++) {
591 stv06xx_read_sensor(sd, reg, &val);
592 info("reg 0x%02x = 0x%02x", reg, val);
593 }
594 return 0;
595}
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