summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/media/usb/gspca/konica.c
blob: 0712b1bc90b4dd5f3f87796865837de66f30c595 (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
/*
 * Driver for USB webcams based on Konica chipset. This
 * chipset is used in Intel YC76 camera.
 *
 * Copyright (C) 2010 Hans de Goede <hdegoede@redhat.com>
 *
 * Based on the usbvideo v4l1 konicawc driver which is:
 *
 * Copyright (C) 2002 Simon Evans <spse@secret.org.uk>
 *
 * The code for making gspca work with a webcam with 2 isoc endpoints was
 * taken from the benq gspca subdriver which is:
 *
 * Copyright (C) 2009 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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#define MODULE_NAME "konica"

#include <linux/input.h>
#include "gspca.h"

MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_DESCRIPTION("Konica chipset USB Camera Driver");
MODULE_LICENSE("GPL");

#define WHITEBAL_REG   0x01
#define BRIGHTNESS_REG 0x02
#define SHARPNESS_REG  0x03
#define CONTRAST_REG   0x04
#define SATURATION_REG 0x05

/* specific webcam descriptor */
struct sd {
	struct gspca_dev gspca_dev;	/* !! must be the first item */
	struct urb *last_data_urb;
	u8 snapshot_pressed;
};


/* .priv is what goes to register 8 for this mode, known working values:
   0x00 -> 176x144, cropped
   0x01 -> 176x144, cropped
   0x02 -> 176x144, cropped
   0x03 -> 176x144, cropped
   0x04 -> 176x144, binned
   0x05 -> 320x240
   0x06 -> 320x240
   0x07 -> 160x120, cropped
   0x08 -> 160x120, cropped
   0x09 -> 160x120, binned (note has 136 lines)
   0x0a -> 160x120, binned (note has 136 lines)
   0x0b -> 160x120, cropped
*/
static const struct v4l2_pix_format vga_mode[] = {
	{160, 120, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
		.bytesperline = 160,
		.sizeimage = 160 * 136 * 3 / 2 + 960,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0x0a},
	{176, 144, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
		.bytesperline = 176,
		.sizeimage = 176 * 144 * 3 / 2 + 960,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0x04},
	{320, 240, V4L2_PIX_FMT_KONICA420, V4L2_FIELD_NONE,
		.bytesperline = 320,
		.sizeimage = 320 * 240 * 3 / 2 + 960,
		.colorspace = V4L2_COLORSPACE_SRGB,
		.priv = 0x05},
};

static void sd_isoc_irq(struct urb *urb);

static void reg_w(struct gspca_dev *gspca_dev, u16 value, u16 index)
{
	struct usb_device *dev = gspca_dev->dev;
	int ret;

	if (gspca_dev->usb_err < 0)
		return;
	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
			0x02,
			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			value,
			index,
			NULL,
			0,
			1000);
	if (ret < 0) {
		pr_err("reg_w err writing %02x to %02x: %d\n",
		       value, index, ret);
		gspca_dev->usb_err = ret;
	}
}

static void reg_r(struct gspca_dev *gspca_dev, u16 value, u16 index)
{
	struct usb_device *dev = gspca_dev->dev;
	int ret;

	if (gspca_dev->usb_err < 0)
		return;
	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
			0x03,
			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			value,
			index,
			gspca_dev->usb_buf,
			2,
			1000);
	if (ret < 0) {
		pr_err("reg_r err %d\n", ret);
		gspca_dev->usb_err = ret;
	}
}

static void konica_stream_on(struct gspca_dev *gspca_dev)
{
	reg_w(gspca_dev, 1, 0x0b);
}

static void konica_stream_off(struct gspca_dev *gspca_dev)
{
	reg_w(gspca_dev, 0, 0x0b);
}

/* this function is called at probe time */
static int sd_config(struct gspca_dev *gspca_dev,
			const struct usb_device_id *id)
{
	gspca_dev->cam.cam_mode = vga_mode;
	gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
	gspca_dev->cam.no_urb_create = 1;

	return 0;
}

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

	/*
	 * The konica needs a freaking large time to "boot" (approx 6.5 sec.),
	 * and does not want to be bothered while doing so :|
	 * Register 0x10 counts from 1 - 3, with 3 being "ready"
	 */
	msleep(6000);
	for (i = 0; i < 20; i++) {
		reg_r(gspca_dev, 0, 0x10);
		if (gspca_dev->usb_buf[0] == 3)
			break;
		msleep(100);
	}
	reg_w(gspca_dev, 0, 0x0d);

	return gspca_dev->usb_err;
}

static int sd_start(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;
	struct urb *urb;
	int i, n, packet_size;
	struct usb_host_interface *alt;
	struct usb_interface *intf;

	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) {
		pr_err("Couldn't get altsetting\n");
		return -EIO;
	}

	packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);

	n = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
	reg_w(gspca_dev, n, 0x08);

	konica_stream_on(gspca_dev);

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

	/* create 4 URBs - 2 on endpoint 0x83 and 2 on 0x082 */
#if MAX_NURBS < 4
#error "Not enough URBs in the gspca table"
#endif
#define SD_NPKT 32
	for (n = 0; n < 4; n++) {
		i = n & 1 ? 0 : 1;
		packet_size =
			le16_to_cpu(alt->endpoint[i].desc.wMaxPacketSize);
		urb = usb_alloc_urb(SD_NPKT, GFP_KERNEL);
		if (!urb) {
			pr_err("usb_alloc_urb failed\n");
			return -ENOMEM;
		}
		gspca_dev->urb[n] = urb;
		urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
						packet_size * SD_NPKT,
						GFP_KERNEL,
						&urb->transfer_dma);
		if (urb->transfer_buffer == NULL) {
			pr_err("usb_buffer_alloc failed\n");
			return -ENOMEM;
		}

		urb->dev = gspca_dev->dev;
		urb->context = gspca_dev;
		urb->transfer_buffer_length = packet_size * SD_NPKT;
		urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
					n & 1 ? 0x81 : 0x82);
		urb->transfer_flags = URB_ISO_ASAP
					| URB_NO_TRANSFER_DMA_MAP;
		urb->interval = 1;
		urb->complete = sd_isoc_irq;
		urb->number_of_packets = SD_NPKT;
		for (i = 0; i < SD_NPKT; i++) {
			urb->iso_frame_desc[i].length = packet_size;
			urb->iso_frame_desc[i].offset = packet_size * i;
		}
	}

	return 0;
}

static void sd_stopN(struct gspca_dev *gspca_dev)
{
	struct sd *sd __maybe_unused = (struct sd *) gspca_dev;

	konica_stream_off(gspca_dev);
#if IS_ENABLED(CONFIG_INPUT)
	/* Don't keep the button in the pressed state "forever" if it was
	   pressed when streaming is stopped */
	if (sd->snapshot_pressed) {
		input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
		input_sync(gspca_dev->input_dev);
		sd->snapshot_pressed = 0;
	}
#endif
}

/* reception of an URB */
static void sd_isoc_irq(struct urb *urb)
{
	struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
	struct sd *sd = (struct sd *) gspca_dev;
	struct urb *data_urb, *status_urb;
	u8 *data;
	int i, st;

	PDEBUG(D_PACK, "sd isoc irq");
	if (!gspca_dev->streaming)
		return;

	if (urb->status != 0) {
		if (urb->status == -ESHUTDOWN)
			return;		/* disconnection */
#ifdef CONFIG_PM
		if (gspca_dev->frozen)
			return;
#endif
		PERR("urb status: %d", urb->status);
		st = usb_submit_urb(urb, GFP_ATOMIC);
		if (st < 0)
			pr_err("resubmit urb error %d\n", st);
		return;
	}

	/* if this is a data URB (ep 0x82), wait */
	if (urb->transfer_buffer_length > 32) {
		sd->last_data_urb = urb;
		return;
	}

	status_urb = urb;
	data_urb   = sd->last_data_urb;
	sd->last_data_urb = NULL;

	if (!data_urb || data_urb->start_frame != status_urb->start_frame) {
		PERR("lost sync on frames");
		goto resubmit;
	}

	if (data_urb->number_of_packets != status_urb->number_of_packets) {
		PERR("no packets does not match, data: %d, status: %d",
		     data_urb->number_of_packets,
		     status_urb->number_of_packets);
		goto resubmit;
	}

	for (i = 0; i < status_urb->number_of_packets; i++) {
		if (data_urb->iso_frame_desc[i].status ||
		    status_urb->iso_frame_desc[i].status) {
			PERR("pkt %d data-status %d, status-status %d", i,
			     data_urb->iso_frame_desc[i].status,
			     status_urb->iso_frame_desc[i].status);
			gspca_dev->last_packet_type = DISCARD_PACKET;
			continue;
		}

		if (status_urb->iso_frame_desc[i].actual_length != 1) {
			PERR("bad status packet length %d",
			     status_urb->iso_frame_desc[i].actual_length);
			gspca_dev->last_packet_type = DISCARD_PACKET;
			continue;
		}

		st = *((u8 *)status_urb->transfer_buffer
				+ status_urb->iso_frame_desc[i].offset);

		data = (u8 *)data_urb->transfer_buffer
				+ data_urb->iso_frame_desc[i].offset;

		/* st: 0x80-0xff: frame start with frame number (ie 0-7f)
		 * otherwise:
		 * bit 0 0: keep packet
		 *	 1: drop packet (padding data)
		 *
		 * bit 4 0 button not clicked
		 *       1 button clicked
		 * button is used to `take a picture' (in software)
		 */
		if (st & 0x80) {
			gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
			gspca_frame_add(gspca_dev, FIRST_PACKET, NULL, 0);
		} else {
#if IS_ENABLED(CONFIG_INPUT)
			u8 button_state = st & 0x40 ? 1 : 0;
			if (sd->snapshot_pressed != button_state) {
				input_report_key(gspca_dev->input_dev,
						 KEY_CAMERA,
						 button_state);
				input_sync(gspca_dev->input_dev);
				sd->snapshot_pressed = button_state;
			}
#endif
			if (st & 0x01)
				continue;
		}
		gspca_frame_add(gspca_dev, INTER_PACKET, data,
				data_urb->iso_frame_desc[i].actual_length);
	}

resubmit:
	if (data_urb) {
		st = usb_submit_urb(data_urb, GFP_ATOMIC);
		if (st < 0)
			PERR("usb_submit_urb(data_urb) ret %d", st);
	}
	st = usb_submit_urb(status_urb, GFP_ATOMIC);
	if (st < 0)
		PERR("usb_submit_urb(status_urb) ret %d\n", st);
}

static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct gspca_dev *gspca_dev =
		container_of(ctrl->handler, struct gspca_dev, ctrl_handler);

	gspca_dev->usb_err = 0;

	if (!gspca_dev->streaming)
		return 0;

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
		konica_stream_off(gspca_dev);
		reg_w(gspca_dev, ctrl->val, BRIGHTNESS_REG);
		konica_stream_on(gspca_dev);
		break;
	case V4L2_CID_CONTRAST:
		konica_stream_off(gspca_dev);
		reg_w(gspca_dev, ctrl->val, CONTRAST_REG);
		konica_stream_on(gspca_dev);
		break;
	case V4L2_CID_SATURATION:
		konica_stream_off(gspca_dev);
		reg_w(gspca_dev, ctrl->val, SATURATION_REG);
		konica_stream_on(gspca_dev);
		break;
	case V4L2_CID_WHITE_BALANCE_TEMPERATURE:
		konica_stream_off(gspca_dev);
		reg_w(gspca_dev, ctrl->val, WHITEBAL_REG);
		konica_stream_on(gspca_dev);
		break;
	case V4L2_CID_SHARPNESS:
		konica_stream_off(gspca_dev);
		reg_w(gspca_dev, ctrl->val, SHARPNESS_REG);
		konica_stream_on(gspca_dev);
		break;
	}
	return gspca_dev->usb_err;
}

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

static int sd_init_controls(struct gspca_dev *gspca_dev)
{
	struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;

	gspca_dev->vdev.ctrl_handler = hdl;
	v4l2_ctrl_handler_init(hdl, 5);
	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
			V4L2_CID_BRIGHTNESS, 0, 9, 1, 4);
	/* Needs to be verified */
	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
			V4L2_CID_CONTRAST, 0, 9, 1, 4);
	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
			V4L2_CID_SATURATION, 0, 9, 1, 4);
	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
			V4L2_CID_WHITE_BALANCE_TEMPERATURE,
			0, 33, 1, 25);
	v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
			V4L2_CID_SHARPNESS, 0, 9, 1, 4);

	if (hdl->error) {
		pr_err("Could not initialize controls\n");
		return hdl->error;
	}
	return 0;
}

/* 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,
#if IS_ENABLED(CONFIG_INPUT)
	.other_input = 1,
#endif
};

/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
	{USB_DEVICE(0x04c8, 0x0720)}, /* Intel YC 76 */
	{}
};
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);