aboutsummaryrefslogtreecommitdiff
path: root/drivers/media/usb/gspca/pac207.c
blob: 07529e5a0c5605186b3aa619b6b89d06cf98bc45 (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
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
/*
 * Pixart PAC207BCA library
 *
 * Copyright (C) 2008 Hans de Goede <hdegoede@redhat.com>
 * Copyright (C) 2005 Thomas Kaiser thomas@kaiser-linux.li
 * Copyleft (C) 2005 Michel Xhaard mxhaard@magic.fr
 *
 * 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
 * (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
 *
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#define MODULE_NAME "pac207"

#include <linux/input.h>
#include "gspca.h"
/* Include pac common sof detection functions */
#include "pac_common.h"

MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_DESCRIPTION("Pixart PAC207");
MODULE_LICENSE("GPL");

#define PAC207_CTRL_TIMEOUT		100  /* ms */

#define PAC207_BRIGHTNESS_MIN		0
#define PAC207_BRIGHTNESS_MAX		255
#define PAC207_BRIGHTNESS_DEFAULT	46
#define PAC207_BRIGHTNESS_REG		0x08

#define PAC207_EXPOSURE_MIN		3
#define PAC207_EXPOSURE_MAX		90 /* 1 sec expo time / 1 fps */
#define PAC207_EXPOSURE_DEFAULT		5 /* power on default: 3 */
#define PAC207_EXPOSURE_REG		0x02

#define PAC207_GAIN_MIN			0
#define PAC207_GAIN_MAX			31
#define PAC207_GAIN_DEFAULT		7 /* power on default: 9 */
#define PAC207_GAIN_REG			0x0e

#define PAC207_AUTOGAIN_DEADZONE	30

/* global parameters */
static int led_invert;
module_param(led_invert, int, 0644);
MODULE_PARM_DESC(led_invert, "Invert led");

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

	struct v4l2_ctrl *brightness;

	u8 mode;
	u8 sof_read;
	u8 header_read;
	u8 autogain_ignore_frames;

	atomic_t avg_lum;
};

static const struct v4l2_pix_format sif_mode[] = {
	{176, 144, V4L2_PIX_FMT_PAC207, V4L2_FIELD_NONE,
		.bytesperline = 176,
		.sizeimage = (176 + 2) * 144,
			/* uncompressed, add 2 bytes / line for line header */
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 1},
	{352, 288, V4L2_PIX_FMT_PAC207, V4L2_FIELD_NONE,
		.bytesperline = 352,
			/* compressed, but only when needed (not compressed
			   when the framerate is low) */
		.sizeimage = (352 + 2) * 288,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0},
};

static const __u8 pac207_sensor_init[][8] = {
	{0x10, 0x12, 0x0d, 0x12, 0x0c, 0x01, 0x29, 0x84},
	{0x49, 0x64, 0x64, 0x64, 0x04, 0x10, 0xf0, 0x30},
	{0x00, 0x00, 0x00, 0x70, 0xa0, 0xf8, 0x00, 0x00},
	{0x32, 0x00, 0x96, 0x00, 0xa2, 0x02, 0xaf, 0x00},
};

static void pac207_write_regs(struct gspca_dev *gspca_dev, u16 index,
	const u8 *buffer, u16 length)
{
	struct usb_device *udev = gspca_dev->dev;
	int err;

	if (gspca_dev->usb_err < 0)
		return;

	memcpy(gspca_dev->usb_buf, buffer, length);

	err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x01,
			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
			0x00, index,
			gspca_dev->usb_buf, length, PAC207_CTRL_TIMEOUT);
	if (err < 0) {
		pr_err("Failed to write registers to index 0x%04X, error %d\n",
		       index, err);
		gspca_dev->usb_err = err;
	}
}

static void pac207_write_reg(struct gspca_dev *gspca_dev, u16 index, u16 value)
{
	struct usb_device *udev = gspca_dev->dev;
	int err;

	if (gspca_dev->usb_err < 0)
		return;

	err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00,
			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
			value, index, NULL, 0, PAC207_CTRL_TIMEOUT);
	if (err) {
		pr_err("Failed to write a register (index 0x%04X, value 0x%02X, error %d)\n",
		       index, value, err);
		gspca_dev->usb_err = err;
	}
}

static int pac207_read_reg(struct gspca_dev *gspca_dev, u16 index)
{
	struct usb_device *udev = gspca_dev->dev;
	int res;

	if (gspca_dev->usb_err < 0)
		return 0;

	res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00,
			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
			0x00, index,
			gspca_dev->usb_buf, 1, PAC207_CTRL_TIMEOUT);
	if (res < 0) {
		pr_err("Failed to read a register (index 0x%04X, error %d)\n",
		       index, res);
		gspca_dev->usb_err = res;
		return 0;
	}

	return gspca_dev->usb_buf[0];
}

/* this function is called at probe time */
static int sd_config(struct gspca_dev *gspca_dev,
			const struct usb_device_id *id)
{
	struct cam *cam;
	u8 idreg[2];

	idreg[0] = pac207_read_reg(gspca_dev, 0x0000);
	idreg[1] = pac207_read_reg(gspca_dev, 0x0001);
	idreg[0] = ((idreg[0] & 0x0f) << 4) | ((idreg[1] & 0xf0) >> 4);
	idreg[1] = idreg[1] & 0x0f;
	PDEBUG(D_PROBE, "Pixart Sensor ID 0x%02X Chips ID 0x%02X",
		idreg[0], idreg[1]);

	if (idreg[0] != 0x27) {
		PDEBUG(D_PROBE, "Error invalid sensor ID!");
		return -ENODEV;
	}

	PDEBUG(D_PROBE,
		"Pixart PAC207BCA Image Processor and Control Chip detected"
		" (vid/pid 0x%04X:0x%04X)", id->idVendor, id->idProduct);

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

	return 0;
}

/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
	u8 mode;

	/* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */
	if (led_invert)
		mode = 0x02;
	else
		mode = 0x00;
	pac207_write_reg(gspca_dev, 0x41, mode);
	pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */

	return gspca_dev->usb_err;
}

static void setcontrol(struct gspca_dev *gspca_dev, u16 reg, u16 val)
{
	pac207_write_reg(gspca_dev, reg, val);
	pac207_write_reg(gspca_dev, 0x13, 0x01);	/* Bit 0, auto clear */
	pac207_write_reg(gspca_dev, 0x1c, 0x01);	/* not documented */
}

static int sd_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;

	gspca_dev->usb_err = 0;

	if (ctrl->id == V4L2_CID_AUTOGAIN && ctrl->is_new && ctrl->val) {
		/* when switching to autogain set defaults to make sure
		   we are on a valid point of the autogain gain /
		   exposure knee graph, and give this change time to
		   take effect before doing autogain. */
		gspca_dev->exposure->val    = PAC207_EXPOSURE_DEFAULT;
		gspca_dev->gain->val        = PAC207_GAIN_DEFAULT;
		sd->autogain_ignore_frames  = PAC_AUTOGAIN_IGNORE_FRAMES;
	}

	if (!gspca_dev->streaming)
		return 0;

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
		setcontrol(gspca_dev, PAC207_BRIGHTNESS_REG, ctrl->val);
		break;
	case V4L2_CID_AUTOGAIN:
		if (gspca_dev->exposure->is_new || (ctrl->is_new && ctrl->val))
			setcontrol(gspca_dev, PAC207_EXPOSURE_REG,
				   gspca_dev->exposure->val);
		if (gspca_dev->gain->is_new || (ctrl->is_new && ctrl->val))
			setcontrol(gspca_dev, PAC207_GAIN_REG,
				   gspca_dev->gain->val);
		break;
	default:
		return -EINVAL;
	}
	return gspca_dev->usb_err;
}

static const struct v4l2_ctrl_ops sd_ctrl_ops = {
	.s_ctrl = sd_s_ctrl,
};

/* this function is called at probe time */
static int sd_init_controls(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;
	struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;

	gspca_dev->vdev.ctrl_handler = hdl;
	v4l2_ctrl_handler_init(hdl, 4);

	sd->brightness = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
				V4L2_CID_BRIGHTNESS,
				PAC207_BRIGHTNESS_MIN, PAC207_BRIGHTNESS_MAX,
				1, PAC207_BRIGHTNESS_DEFAULT);
	gspca_dev->autogain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
				V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
	gspca_dev->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
				V4L2_CID_EXPOSURE,
				PAC207_EXPOSURE_MIN, PAC207_EXPOSURE_MAX,
				1, PAC207_EXPOSURE_DEFAULT);
	gspca_dev->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
				V4L2_CID_GAIN,
				PAC207_GAIN_MIN, PAC207_GAIN_MAX,
				1, PAC207_GAIN_DEFAULT);
	if (hdl->error) {
		pr_err("Could not initialize controls\n");
		return hdl->error;
	}
	v4l2_ctrl_auto_cluster(3, &gspca_dev->autogain, 0, false);
	return 0;
}

/* -- start the camera -- */
static int sd_start(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;
	__u8 mode;

	pac207_write_reg(gspca_dev, 0x0f, 0x10); /* Power control (Bit 6-0) */
	pac207_write_regs(gspca_dev, 0x0002, pac207_sensor_init[0], 8);
	pac207_write_regs(gspca_dev, 0x000a, pac207_sensor_init[1], 8);
	pac207_write_regs(gspca_dev, 0x0012, pac207_sensor_init[2], 8);
	pac207_write_regs(gspca_dev, 0x0042, pac207_sensor_init[3], 8);

	/* Compression Balance */
	if (gspca_dev->pixfmt.width == 176)
		pac207_write_reg(gspca_dev, 0x4a, 0xff);
	else
		pac207_write_reg(gspca_dev, 0x4a, 0x30);
	pac207_write_reg(gspca_dev, 0x4b, 0x00); /* Sram test value */
	pac207_write_reg(gspca_dev, 0x08, v4l2_ctrl_g_ctrl(sd->brightness));

	/* PGA global gain (Bit 4-0) */
	pac207_write_reg(gspca_dev, 0x0e,
		v4l2_ctrl_g_ctrl(gspca_dev->gain));
	pac207_write_reg(gspca_dev, 0x02,
		v4l2_ctrl_g_ctrl(gspca_dev->exposure)); /* PXCK = 12MHz /n */

	/* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */
	if (led_invert)
		mode = 0x00;
	else
		mode = 0x02;
	if (gspca_dev->pixfmt.width == 176) {	/* 176x144 */
		mode |= 0x01;
		PDEBUG(D_STREAM, "pac207_start mode 176x144");
	} else {				/* 352x288 */
		PDEBUG(D_STREAM, "pac207_start mode 352x288");
	}
	pac207_write_reg(gspca_dev, 0x41, mode);

	pac207_write_reg(gspca_dev, 0x13, 0x01); /* Bit 0, auto clear */
	pac207_write_reg(gspca_dev, 0x1c, 0x01); /* not documented */
	msleep(10);
	pac207_write_reg(gspca_dev, 0x40, 0x01); /* Start ISO pipe */

	sd->sof_read = 0;
	sd->autogain_ignore_frames = 0;
	atomic_set(&sd->avg_lum, -1);
	return gspca_dev->usb_err;
}

static void sd_stopN(struct gspca_dev *gspca_dev)
{
	u8 mode;

	/* mode: Image Format (Bit 0), LED (1), Compr. test mode (2) */
	if (led_invert)
		mode = 0x02;
	else
		mode = 0x00;
	pac207_write_reg(gspca_dev, 0x40, 0x00); /* Stop ISO pipe */
	pac207_write_reg(gspca_dev, 0x41, mode); /* Turn off LED */
	pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */
}


static void pac207_do_auto_gain(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;
	int avg_lum = atomic_read(&sd->avg_lum);

	if (avg_lum == -1)
		return;

	if (sd->autogain_ignore_frames > 0)
		sd->autogain_ignore_frames--;
	else if (gspca_coarse_grained_expo_autogain(gspca_dev, avg_lum,
			90, PAC207_AUTOGAIN_DEADZONE))
		sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES;
}

static void sd_pkt_scan(struct gspca_dev *gspca_dev,
			u8 *data,
			int len)
{
	struct sd *sd = (struct sd *) gspca_dev;
	unsigned char *sof;

	sof = pac_find_sof(gspca_dev, &sd->sof_read, data, len);
	if (sof) {
		int n;

		/* finish decoding current frame */
		n = sof - data;
		if (n > sizeof pac_sof_marker)
			n -= sizeof pac_sof_marker;
		else
			n = 0;
		gspca_frame_add(gspca_dev, LAST_PACKET,
				data, n);
		sd->header_read = 0;
		gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
		len -= sof - data;
		data = sof;
	}
	if (sd->header_read < 11) {
		int needed;

		/* get average lumination from frame header (byte 5) */
		if (sd->header_read < 5) {
			needed = 5 - sd->header_read;
			if (len >= needed)
				atomic_set(&sd->avg_lum, data[needed - 1]);
		}
		/* skip the rest of the header */
		needed = 11 - sd->header_read;
		if (len <= needed) {
			sd->header_read += len;
			return;
		}
		data += needed;
		len -= needed;
		sd->header_read = 11;
	}

	gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
}

#if IS_ENABLED(CONFIG_INPUT)
static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
			u8 *data,		/* interrupt packet data */
			int len)		/* interrupt packet length */
{
	int ret = -EINVAL;

	if (len == 2 && data[0] == 0x5a && data[1] == 0x5a) {
		input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
		input_sync(gspca_dev->input_dev);
		input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
		input_sync(gspca_dev->input_dev);
		ret = 0;
	}

	return ret;
}
#endif

/* sub-driver description */
static const struct sd_desc sd_desc = {
	.name = MODULE_NAME,
	.config = sd_config,
	.init = sd_init,
	.init_controls = sd_init_controls,
	.start = sd_start,
	.stopN = sd_stopN,
	.dq_callback = pac207_do_auto_gain,
	.pkt_scan = sd_pkt_scan,
#if IS_ENABLED(CONFIG_INPUT)
	.int_pkt_scan = sd_int_pkt_scan,
#endif
};

/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
	{USB_DEVICE(0x041e, 0x4028)},
	{USB_DEVICE(0x093a, 0x2460)},
	{USB_DEVICE(0x093a, 0x2461)},
	{USB_DEVICE(0x093a, 0x2463)},
	{USB_DEVICE(0x093a, 0x2464)},
	{USB_DEVICE(0x093a, 0x2468)},
	{USB_DEVICE(0x093a, 0x2470)},
	{USB_DEVICE(0x093a, 0x2471)},
	{USB_DEVICE(0x093a, 0x2472)},
	{USB_DEVICE(0x093a, 0x2474)},
	{USB_DEVICE(0x093a, 0x2476)},
	{USB_DEVICE(0x145f, 0x013a)},
	{USB_DEVICE(0x2001, 0xf115)},
	{}
};
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,
	.reset_resume = gspca_resume,
#endif
};

module_usb_driver(sd_driver);