summaryrefslogtreecommitdiff
path: root/drivers/media/usb/gspca/stv06xx/stv06xx_pb0100.c
blob: cdfc3d05ab6b329f550f98004f0a777323b7f7c3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
/*
 * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
 *		      Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
 * Copyright (c) 2002, 2003 Tuukka Toivonen
 * Copyright (c) 2008 Erik Andrén
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * P/N 861037:      Sensor HDCS1000        ASIC STV0600
 * P/N 861050-0010: Sensor HDCS1000        ASIC STV0600
 * P/N 861050-0020: Sensor Photobit PB100  ASIC STV0600-1 - QuickCam Express
 * P/N 861055:      Sensor ST VV6410       ASIC STV0610   - LEGO cam
 * P/N 861075-0040: Sensor HDCS1000        ASIC
 * P/N 961179-0700: Sensor ST VV6410       ASIC STV0602   - Dexxa WebCam USB
 * P/N 861040-0000: Sensor ST VV6410       ASIC STV0610   - QuickCam Web
 */

/*
 * The spec file for the PB-0100 suggests the following for best quality
 * images after the sensor has been reset :
 *
 * PB_ADCGAINL      = R60 = 0x03 (3 dec)      : sets low reference of ADC
						to produce good black level
 * PB_PREADCTRL     = R32 = 0x1400 (5120 dec) : Enables global gain changes
						through R53
 * PB_ADCMINGAIN    = R52 = 0x10 (16 dec)     : Sets the minimum gain for
						auto-exposure
 * PB_ADCGLOBALGAIN = R53 = 0x10 (16 dec)     : Sets the global gain
 * PB_EXPGAIN       = R14 = 0x11 (17 dec)     : Sets the auto-exposure value
 * PB_UPDATEINT     = R23 = 0x02 (2 dec)      : Sets the speed on
						auto-exposure routine
 * PB_CFILLIN       = R5  = 0x0E (14 dec)     : Sets the frame rate
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include "stv06xx_pb0100.h"

struct pb0100_ctrls {
	struct { /* one big happy control cluster... */
		struct v4l2_ctrl *autogain;
		struct v4l2_ctrl *gain;
		struct v4l2_ctrl *exposure;
		struct v4l2_ctrl *red;
		struct v4l2_ctrl *blue;
		struct v4l2_ctrl *natural;
	};
	struct v4l2_ctrl *target;
};

static struct v4l2_pix_format pb0100_mode[] = {
/* low res / subsample modes disabled as they are only half res horizontal,
   halving the vertical resolution does not seem to work */
	{
		320,
		240,
		V4L2_PIX_FMT_SGRBG8,
		V4L2_FIELD_NONE,
		.sizeimage = 320 * 240,
		.bytesperline = 320,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = PB0100_CROP_TO_VGA
	},
	{
		352,
		288,
		V4L2_PIX_FMT_SGRBG8,
		V4L2_FIELD_NONE,
		.sizeimage = 352 * 288,
		.bytesperline = 352,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0
	}
};

static int pb0100_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct gspca_dev *gspca_dev =
		container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
	struct sd *sd = (struct sd *)gspca_dev;
	struct pb0100_ctrls *ctrls = sd->sensor_priv;
	int err = -EINVAL;

	switch (ctrl->id) {
	case V4L2_CID_AUTOGAIN:
		err = pb0100_set_autogain(gspca_dev, ctrl->val);
		if (err)
			break;
		if (ctrl->val)
			break;
		err = pb0100_set_gain(gspca_dev, ctrls->gain->val);
		if (err)
			break;
		err = pb0100_set_exposure(gspca_dev, ctrls->exposure->val);
		break;
	case V4L2_CTRL_CLASS_USER + 0x1001:
		err = pb0100_set_autogain_target(gspca_dev, ctrl->val);
		break;
	}
	return err;
}

static const struct v4l2_ctrl_ops pb0100_ctrl_ops = {
	.s_ctrl = pb0100_s_ctrl,
};

static int pb0100_init_controls(struct sd *sd)
{
	struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;
	struct pb0100_ctrls *ctrls;
	static const struct v4l2_ctrl_config autogain_target = {
		.ops = &pb0100_ctrl_ops,
		.id = V4L2_CTRL_CLASS_USER + 0x1000,
		.type = V4L2_CTRL_TYPE_INTEGER,
		.name = "Automatic Gain Target",
		.max = 255,
		.step = 1,
		.def = 128,
	};
	static const struct v4l2_ctrl_config natural_light = {
		.ops = &pb0100_ctrl_ops,
		.id = V4L2_CTRL_CLASS_USER + 0x1001,
		.type = V4L2_CTRL_TYPE_BOOLEAN,
		.name = "Natural Light Source",
		.max = 1,
		.step = 1,
		.def = 1,
	};

	ctrls = kzalloc(sizeof(*ctrls), GFP_KERNEL);
	if (!ctrls)
		return -ENOMEM;

	v4l2_ctrl_handler_init(hdl, 6);
	ctrls->autogain = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
			V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
	ctrls->exposure = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
			V4L2_CID_EXPOSURE, 0, 511, 1, 12);
	ctrls->gain = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
			V4L2_CID_GAIN, 0, 255, 1, 128);
	ctrls->red = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
			V4L2_CID_RED_BALANCE, -255, 255, 1, 0);
	ctrls->blue = v4l2_ctrl_new_std(hdl, &pb0100_ctrl_ops,
			V4L2_CID_BLUE_BALANCE, -255, 255, 1, 0);
	ctrls->natural = v4l2_ctrl_new_custom(hdl, &natural_light, NULL);
	ctrls->target = v4l2_ctrl_new_custom(hdl, &autogain_target, NULL);
	if (hdl->error) {
		kfree(ctrls);
		return hdl->error;
	}
	sd->sensor_priv = ctrls;
	v4l2_ctrl_auto_cluster(5, &ctrls->autogain, 0, false);
	return 0;
}

static int pb0100_probe(struct sd *sd)
{
	u16 sensor;
	int err;

	err = stv06xx_read_sensor(sd, PB_IDENT, &sensor);

	if (err < 0)
		return -ENODEV;
	if ((sensor >> 8) != 0x64)
		return -ENODEV;

	pr_info("Photobit pb0100 sensor detected\n");

	sd->gspca_dev.cam.cam_mode = pb0100_mode;
	sd->gspca_dev.cam.nmodes = ARRAY_SIZE(pb0100_mode);

	return 0;
}

static int pb0100_start(struct sd *sd)
{
	int err, packet_size, max_packet_size;
	struct usb_host_interface *alt;
	struct usb_interface *intf;
	struct cam *cam = &sd->gspca_dev.cam;
	u32 mode = cam->cam_mode[sd->gspca_dev.curr_mode].priv;

	intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
	alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
	if (!alt)
		return -ENODEV;
	packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);

	/* If we don't have enough bandwidth use a lower framerate */
	max_packet_size = sd->sensor->max_packet_size[sd->gspca_dev.curr_mode];
	if (packet_size < max_packet_size)
		stv06xx_write_sensor(sd, PB_ROWSPEED, BIT(4)|BIT(3)|BIT(1));
	else
		stv06xx_write_sensor(sd, PB_ROWSPEED, BIT(5)|BIT(3)|BIT(1));

	/* Setup sensor window */
	if (mode & PB0100_CROP_TO_VGA) {
		stv06xx_write_sensor(sd, PB_RSTART, 30);
		stv06xx_write_sensor(sd, PB_CSTART, 20);
		stv06xx_write_sensor(sd, PB_RWSIZE, 240 - 1);
		stv06xx_write_sensor(sd, PB_CWSIZE, 320 - 1);
	} else {
		stv06xx_write_sensor(sd, PB_RSTART, 8);
		stv06xx_write_sensor(sd, PB_CSTART, 4);
		stv06xx_write_sensor(sd, PB_RWSIZE, 288 - 1);
		stv06xx_write_sensor(sd, PB_CWSIZE, 352 - 1);
	}

	if (mode & PB0100_SUBSAMPLE) {
		stv06xx_write_bridge(sd, STV_Y_CTRL, 0x02); /* Wrong, FIXME */
		stv06xx_write_bridge(sd, STV_X_CTRL, 0x06);

		stv06xx_write_bridge(sd, STV_SCAN_RATE, 0x10);
	} else {
		stv06xx_write_bridge(sd, STV_Y_CTRL, 0x01);
		stv06xx_write_bridge(sd, STV_X_CTRL, 0x0a);
		/* larger -> slower */
		stv06xx_write_bridge(sd, STV_SCAN_RATE, 0x20);
	}

	err = stv06xx_write_sensor(sd, PB_CONTROL, BIT(5)|BIT(3)|BIT(1));
	PDEBUG(D_STREAM, "Started stream, status: %d", err);

	return (err < 0) ? err : 0;
}

static int pb0100_stop(struct sd *sd)
{
	int err;

	err = stv06xx_write_sensor(sd, PB_ABORTFRAME, 1);

	if (err < 0)
		goto out;

	/* Set bit 1 to zero */
	err = stv06xx_write_sensor(sd, PB_CONTROL, BIT(5)|BIT(3));

	PDEBUG(D_STREAM, "Halting stream");
out:
	return (err < 0) ? err : 0;
}

/* FIXME: Sort the init commands out and put them into tables,
	  this is only for getting the camera to work */
/* FIXME: No error handling for now,
	  add this once the init has been converted to proper tables */
static int pb0100_init(struct sd *sd)
{
	stv06xx_write_bridge(sd, STV_REG00, 1);
	stv06xx_write_bridge(sd, STV_SCAN_RATE, 0);

	/* Reset sensor */
	stv06xx_write_sensor(sd, PB_RESET, 1);
	stv06xx_write_sensor(sd, PB_RESET, 0);

	/* Disable chip */
	stv06xx_write_sensor(sd, PB_CONTROL, BIT(5)|BIT(3));

	/* Gain stuff...*/
	stv06xx_write_sensor(sd, PB_PREADCTRL, BIT(12)|BIT(10)|BIT(6));
	stv06xx_write_sensor(sd, PB_ADCGLOBALGAIN, 12);

	/* Set up auto-exposure */
	/* ADC VREF_HI new setting for a transition
	  from the Expose1 to the Expose2 setting */
	stv06xx_write_sensor(sd, PB_R28, 12);
	/* gain max for autoexposure */
	stv06xx_write_sensor(sd, PB_ADCMAXGAIN, 180);
	/* gain min for autoexposure  */
	stv06xx_write_sensor(sd, PB_ADCMINGAIN, 12);
	/* Maximum frame integration time (programmed into R8)
	   allowed for auto-exposure routine */
	stv06xx_write_sensor(sd, PB_R54, 3);
	/* Minimum frame integration time (programmed into R8)
	   allowed for auto-exposure routine */
	stv06xx_write_sensor(sd, PB_R55, 0);
	stv06xx_write_sensor(sd, PB_UPDATEINT, 1);
	/* R15  Expose0 (maximum that auto-exposure may use) */
	stv06xx_write_sensor(sd, PB_R15, 800);
	/* R17  Expose2 (minimum that auto-exposure may use) */
	stv06xx_write_sensor(sd, PB_R17, 10);

	stv06xx_write_sensor(sd, PB_EXPGAIN, 0);

	/* 0x14 */
	stv06xx_write_sensor(sd, PB_VOFFSET, 0);
	/* 0x0D */
	stv06xx_write_sensor(sd, PB_ADCGAINH, 11);
	/* Set black level (important!) */
	stv06xx_write_sensor(sd, PB_ADCGAINL, 0);

	/* ??? */
	stv06xx_write_bridge(sd, STV_REG00, 0x11);
	stv06xx_write_bridge(sd, STV_REG03, 0x45);
	stv06xx_write_bridge(sd, STV_REG04, 0x07);

	/* Scan/timing for the sensor */
	stv06xx_write_sensor(sd, PB_ROWSPEED, BIT(4)|BIT(3)|BIT(1));
	stv06xx_write_sensor(sd, PB_CFILLIN, 14);
	stv06xx_write_sensor(sd, PB_VBL, 0);
	stv06xx_write_sensor(sd, PB_FINTTIME, 0);
	stv06xx_write_sensor(sd, PB_RINTTIME, 123);

	stv06xx_write_bridge(sd, STV_REG01, 0xc2);
	stv06xx_write_bridge(sd, STV_REG02, 0xb0);
	return 0;
}

static int pb0100_dump(struct sd *sd)
{
	return 0;
}

static int pb0100_set_gain(struct gspca_dev *gspca_dev, __s32 val)
{
	int err;
	struct sd *sd = (struct sd *) gspca_dev;
	struct pb0100_ctrls *ctrls = sd->sensor_priv;

	err = stv06xx_write_sensor(sd, PB_G1GAIN, val);
	if (!err)
		err = stv06xx_write_sensor(sd, PB_G2GAIN, val);
	PDEBUG(D_V4L2, "Set green gain to %d, status: %d", val, err);

	if (!err)
		err = pb0100_set_red_balance(gspca_dev, ctrls->red->val);
	if (!err)
		err = pb0100_set_blue_balance(gspca_dev, ctrls->blue->val);

	return err;
}

static int pb0100_set_red_balance(struct gspca_dev *gspca_dev, __s32 val)
{
	int err;
	struct sd *sd = (struct sd *) gspca_dev;
	struct pb0100_ctrls *ctrls = sd->sensor_priv;

	val += ctrls->gain->val;
	if (val < 0)
		val = 0;
	else if (val > 255)
		val = 255;

	err = stv06xx_write_sensor(sd, PB_RGAIN, val);
	PDEBUG(D_V4L2, "Set red gain to %d, status: %d", val, err);

	return err;
}

static int pb0100_set_blue_balance(struct gspca_dev *gspca_dev, __s32 val)
{
	int err;
	struct sd *sd = (struct sd *) gspca_dev;
	struct pb0100_ctrls *ctrls = sd->sensor_priv;

	val += ctrls->gain->val;
	if (val < 0)
		val = 0;
	else if (val > 255)
		val = 255;

	err = stv06xx_write_sensor(sd, PB_BGAIN, val);
	PDEBUG(D_V4L2, "Set blue gain to %d, status: %d", val, err);

	return err;
}

static int pb0100_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
{
	struct sd *sd = (struct sd *) gspca_dev;
	int err;

	err = stv06xx_write_sensor(sd, PB_RINTTIME, val);
	PDEBUG(D_V4L2, "Set exposure to %d, status: %d", val, err);

	return err;
}

static int pb0100_set_autogain(struct gspca_dev *gspca_dev, __s32 val)
{
	int err;
	struct sd *sd = (struct sd *) gspca_dev;
	struct pb0100_ctrls *ctrls = sd->sensor_priv;

	if (val) {
		if (ctrls->natural->val)
			val = BIT(6)|BIT(4)|BIT(0);
		else
			val = BIT(4)|BIT(0);
	} else
		val = 0;

	err = stv06xx_write_sensor(sd, PB_EXPGAIN, val);
	PDEBUG(D_V4L2, "Set autogain to %d (natural: %d), status: %d",
	       val, ctrls->natural->val, err);

	return err;
}

static int pb0100_set_autogain_target(struct gspca_dev *gspca_dev, __s32 val)
{
	int err, totalpixels, brightpixels, darkpixels;
	struct sd *sd = (struct sd *) gspca_dev;

	/* Number of pixels counted by the sensor when subsampling the pixels.
	 * Slightly larger than the real value to avoid oscillation */
	totalpixels = gspca_dev->width * gspca_dev->height;
	totalpixels = totalpixels/(8*8) + totalpixels/(64*64);

	brightpixels = (totalpixels * val) >> 8;
	darkpixels   = totalpixels - brightpixels;
	err = stv06xx_write_sensor(sd, PB_R21, brightpixels);
	if (!err)
		err = stv06xx_write_sensor(sd, PB_R22, darkpixels);

	PDEBUG(D_V4L2, "Set autogain target to %d, status: %d", val, err);

	return err;
}