Linux preempt-rt

Check our new training course

Real-Time Linux with PREEMPT_RT

Check our new training course
with Creative Commons CC-BY-SA
lecture and lab materials

Bootlin logo

Elixir Cross Referencer

  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
/*
 * Quickcam cameras initialization data
 *
 * V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
 *
 * 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
 * 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
 *
 */
#define MODULE_NAME "tv8532"

#include "gspca.h"

MODULE_AUTHOR("Michel Xhaard <mxhaard@users.sourceforge.net>");
MODULE_DESCRIPTION("TV8532 USB Camera Driver");
MODULE_LICENSE("GPL");

/* specific webcam descriptor */
struct sd {
	struct gspca_dev gspca_dev;	/* !! must be the first item */

	__u16 exposure;
	__u16 gain;

	__u8 packet;
};

/* V4L2 controls supported by the driver */
static int sd_setexposure(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getexposure(struct gspca_dev *gspca_dev, __s32 *val);
static int sd_setgain(struct gspca_dev *gspca_dev, __s32 val);
static int sd_getgain(struct gspca_dev *gspca_dev, __s32 *val);

static const struct ctrl sd_ctrls[] = {
	{
	 {
	  .id = V4L2_CID_EXPOSURE,
	  .type = V4L2_CTRL_TYPE_INTEGER,
	  .name = "Exposure",
	  .minimum = 1,
	  .maximum = 0x18f,
	  .step = 1,
#define EXPOSURE_DEF 0x18f
	  .default_value = EXPOSURE_DEF,
	  },
	 .set = sd_setexposure,
	 .get = sd_getexposure,
	 },
	{
	 {
	  .id = V4L2_CID_GAIN,
	  .type = V4L2_CTRL_TYPE_INTEGER,
	  .name = "Gain",
	  .minimum = 0,
	  .maximum = 0x7ff,
	  .step = 1,
#define GAIN_DEF 0x100
	  .default_value = GAIN_DEF,
	  },
	 .set = sd_setgain,
	 .get = sd_getgain,
	 },
};

static const struct v4l2_pix_format sif_mode[] = {
	{176, 144, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
		.bytesperline = 176,
		.sizeimage = 176 * 144,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 1},
	{352, 288, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
		.bytesperline = 352,
		.sizeimage = 352 * 288,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0},
};

/* TV-8532A (ICM532A) registers (LE) */
#define R00_PART_CONTROL 0x00
#define		LATENT_CHANGE	0x80
#define		EXPO_CHANGE	0x04
#define R01_TIMING_CONTROL_LOW 0x01
#define		CMD_EEprom_Open 0x30
#define		CMD_EEprom_Close 0x29
#define R03_TABLE_ADDR 0x03
#define R04_WTRAM_DATA_L 0x04
#define R05_WTRAM_DATA_M 0x05
#define R06_WTRAM_DATA_H 0x06
#define R07_TABLE_LEN	0x07
#define R08_RAM_WRITE_ACTION 0x08
#define R0C_AD_WIDTHL	0x0c
#define R0D_AD_WIDTHH	0x0d
#define R0E_AD_HEIGHTL	0x0e
#define R0F_AD_HEIGHTH	0x0f
#define R10_AD_COL_BEGINL 0x10
#define R11_AD_COL_BEGINH 0x11
#define		MIRROR		0x04	/* [10] */
#define R14_AD_ROW_BEGINL 0x14
#define R15_AD_ROWBEGINH  0x15
#define R1C_AD_EXPOSE_TIMEL 0x1c
#define R20_GAIN_G1L	0x20
#define R21_GAIN_G1H	0x21
#define R22_GAIN_RL	0x22
#define R23_GAIN_RH	0x23
#define R24_GAIN_BL	0x24
#define R25_GAIN_BH	0x25
#define R26_GAIN_G2L	0x26
#define R27_GAIN_G2H	0x27
#define R28_QUANT	0x28
#define R29_LINE	0x29
#define R2C_POLARITY	0x2c
#define R2D_POINT	0x2d
#define R2E_POINTH	0x2e
#define R2F_POINTB	0x2f
#define R30_POINTBH	0x30
#define R31_UPD		0x31
#define R2A_HIGH_BUDGET 0x2a
#define R2B_LOW_BUDGET	0x2b
#define R34_VID		0x34
#define R35_VIDH	0x35
#define R36_PID		0x36
#define R37_PIDH	0x37
#define R39_Test1	0x39		/* GPIO */
#define R3B_Test3	0x3b		/* GPIO */
#define R83_AD_IDH	0x83
#define R91_AD_SLOPEREG 0x91
#define R94_AD_BITCONTROL 0x94

static const u8 eeprom_data[][3] = {
/*	dataH dataM dataL */
	{0x01, 0x00, 0x01},
	{0x01, 0x80, 0x11},
	{0x05, 0x00, 0x14},
	{0x05, 0x00, 0x1c},
	{0x0d, 0x00, 0x1e},
	{0x05, 0x00, 0x1f},
	{0x05, 0x05, 0x19},
	{0x05, 0x01, 0x1b},
	{0x05, 0x09, 0x1e},
	{0x0d, 0x89, 0x2e},
	{0x05, 0x89, 0x2f},
	{0x05, 0x0d, 0xd9},
	{0x05, 0x09, 0xf1},
};


/* write 1 byte */
static void reg_w1(struct gspca_dev *gspca_dev,
		  __u16 index, __u8 value)
{
	gspca_dev->usb_buf[0] = value;
	usb_control_msg(gspca_dev->dev,
			usb_sndctrlpipe(gspca_dev->dev, 0),
			0x02,
			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			0,	/* value */
			index, gspca_dev->usb_buf, 1, 500);
}

/* write 2 bytes */
static void reg_w2(struct gspca_dev *gspca_dev,
		  u16 index, u16 value)
{
	gspca_dev->usb_buf[0] = value;
	gspca_dev->usb_buf[1] = value >> 8;
	usb_control_msg(gspca_dev->dev,
			usb_sndctrlpipe(gspca_dev->dev, 0),
			0x02,
			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			0,	/* value */
			index, gspca_dev->usb_buf, 2, 500);
}

static void tv_8532WriteEEprom(struct gspca_dev *gspca_dev)
{
	int i;

	reg_w1(gspca_dev, R01_TIMING_CONTROL_LOW, CMD_EEprom_Open);
	for (i = 0; i < ARRAY_SIZE(eeprom_data); i++) {
		reg_w1(gspca_dev, R03_TABLE_ADDR, i);
		reg_w1(gspca_dev, R04_WTRAM_DATA_L, eeprom_data[i][2]);
		reg_w1(gspca_dev, R05_WTRAM_DATA_M, eeprom_data[i][1]);
		reg_w1(gspca_dev, R06_WTRAM_DATA_H, eeprom_data[i][0]);
		reg_w1(gspca_dev, R08_RAM_WRITE_ACTION, 0);
	}
	reg_w1(gspca_dev, R07_TABLE_LEN, i);
	reg_w1(gspca_dev, R01_TIMING_CONTROL_LOW, CMD_EEprom_Close);
}

/* this function is called at probe time */
static int sd_config(struct gspca_dev *gspca_dev,
		     const struct usb_device_id *id)
{
	struct sd *sd = (struct sd *) gspca_dev;
	struct cam *cam;

	cam = &gspca_dev->cam;
	cam->cam_mode = sif_mode;
	cam->nmodes = ARRAY_SIZE(sif_mode);

	sd->exposure = EXPOSURE_DEF;
	sd->gain = GAIN_DEF;
	return 0;
}

static void tv_8532_setReg(struct gspca_dev *gspca_dev)
{
	reg_w1(gspca_dev, R3B_Test3, 0x0a);	/* Test0Sel = 10 */
	/******************************************************/
	reg_w1(gspca_dev, R0E_AD_HEIGHTL, 0x90);
	reg_w1(gspca_dev, R0F_AD_HEIGHTH, 0x01);
	reg_w2(gspca_dev, R1C_AD_EXPOSE_TIMEL, 0x018f);
	reg_w1(gspca_dev, R10_AD_COL_BEGINL, 0x44);
						/* begin active line */
	reg_w1(gspca_dev, R11_AD_COL_BEGINH, 0x00);
						/* mirror and digital gain */
	reg_w1(gspca_dev, R14_AD_ROW_BEGINL, 0x0a);

	reg_w1(gspca_dev, R94_AD_BITCONTROL, 0x02);
	reg_w1(gspca_dev, R91_AD_SLOPEREG, 0x00);
	reg_w1(gspca_dev, R00_PART_CONTROL, LATENT_CHANGE | EXPO_CHANGE);
						/* = 0x84 */
}

/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
	tv_8532WriteEEprom(gspca_dev);

	return 0;
}

static void setexposure(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;

	reg_w2(gspca_dev, R1C_AD_EXPOSE_TIMEL, sd->exposure);
	reg_w1(gspca_dev, R00_PART_CONTROL, LATENT_CHANGE | EXPO_CHANGE);
						/* 0x84 */
}

static void setgain(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;

	reg_w2(gspca_dev, R20_GAIN_G1L, sd->gain);
	reg_w2(gspca_dev, R22_GAIN_RL, sd->gain);
	reg_w2(gspca_dev, R24_GAIN_BL, sd->gain);
	reg_w2(gspca_dev, R26_GAIN_G2L, sd->gain);
}

/* -- start the camera -- */
static int sd_start(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;

	reg_w1(gspca_dev, R0C_AD_WIDTHL, 0xe8);		/* 0x20; 0x0c */
	reg_w1(gspca_dev, R0D_AD_WIDTHH, 0x03);

	/************************************************/
	reg_w1(gspca_dev, R28_QUANT, 0x90);
					/* 0x72 compressed mode 0x28 */
	if (gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv) {
		/* 176x144 */
		reg_w1(gspca_dev, R29_LINE, 0x41);
					/* CIF - 2 lines/packet */
	} else {
		/* 352x288 */
		reg_w1(gspca_dev, R29_LINE, 0x81);
					/* CIF - 2 lines/packet */
	}
	/************************************************/
	reg_w1(gspca_dev, R2C_POLARITY, 0x10);		/* slow clock */
	reg_w1(gspca_dev, R2D_POINT, 0x14);
	reg_w1(gspca_dev, R2E_POINTH, 0x01);
	reg_w1(gspca_dev, R2F_POINTB, 0x12);
	reg_w1(gspca_dev, R30_POINTBH, 0x01);

	tv_8532_setReg(gspca_dev);

	setexposure(gspca_dev);
	setgain(gspca_dev);

	/************************************************/
	reg_w1(gspca_dev, R31_UPD, 0x01);	/* update registers */
	msleep(200);
	reg_w1(gspca_dev, R31_UPD, 0x00);	/* end update */

	gspca_dev->empty_packet = 0;		/* check the empty packets */
	sd->packet = 0;				/* ignore the first packets */

	return 0;
}

static void sd_stopN(struct gspca_dev *gspca_dev)
{
	reg_w1(gspca_dev, R3B_Test3, 0x0b);	/* Test0Sel = 11 = GPIO */
}

static void sd_pkt_scan(struct gspca_dev *gspca_dev,
			u8 *data,			/* isoc packet */
			int len)			/* iso packet length */
{
	struct sd *sd = (struct sd *) gspca_dev;
	int packet_type0, packet_type1;

	packet_type0 = packet_type1 = INTER_PACKET;
	if (gspca_dev->empty_packet) {
		gspca_dev->empty_packet = 0;
		sd->packet = gspca_dev->height / 2;
		packet_type0 = FIRST_PACKET;
	} else if (sd->packet == 0)
		return;			/* 2 more lines in 352x288 ! */
	sd->packet--;
	if (sd->packet == 0)
		packet_type1 = LAST_PACKET;

	/* each packet contains:
	 * - header 2 bytes
	 * - RGRG line
	 * - 4 bytes
	 * - GBGB line
	 * - 4 bytes
	 */
	gspca_frame_add(gspca_dev, packet_type0,
			data + 2, gspca_dev->width);
	gspca_frame_add(gspca_dev, packet_type1,
			data + gspca_dev->width + 5, gspca_dev->width);
}

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

	sd->exposure = val;
	if (gspca_dev->streaming)
		setexposure(gspca_dev);
	return 0;
}

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

	*val = sd->exposure;
	return 0;
}

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

	sd->gain = val;
	if (gspca_dev->streaming)
		setgain(gspca_dev);
	return 0;
}

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

	*val = sd->gain;
	return 0;
}

/* sub-driver description */
static const struct sd_desc sd_desc = {
	.name = MODULE_NAME,
	.ctrls = sd_ctrls,
	.nctrls = ARRAY_SIZE(sd_ctrls),
	.config = sd_config,
	.init = sd_init,
	.start = sd_start,
	.stopN = sd_stopN,
	.pkt_scan = sd_pkt_scan,
};

/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
	{USB_DEVICE(0x046d, 0x0920)},
	{USB_DEVICE(0x046d, 0x0921)},
	{USB_DEVICE(0x0545, 0x808b)},
	{USB_DEVICE(0x0545, 0x8333)},
	{USB_DEVICE(0x0923, 0x010f)},
	{}
};

MODULE_DEVICE_TABLE(usb, device_table);

/* -- device connect -- */
static int sd_probe(struct usb_interface *intf,
		    const struct usb_device_id *id)
{
	return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
			       THIS_MODULE);
}

static struct usb_driver sd_driver = {
	.name = MODULE_NAME,
	.id_table = device_table,
	.probe = sd_probe,
	.disconnect = gspca_disconnect,
#ifdef CONFIG_PM
	.suspend = gspca_suspend,
	.resume = gspca_resume,
#endif
};

/* -- module insert / remove -- */
static int __init sd_mod_init(void)
{
	return usb_register(&sd_driver);
}

static void __exit sd_mod_exit(void)
{
	usb_deregister(&sd_driver);
}

module_init(sd_mod_init);
module_exit(sd_mod_exit);