summaryrefslogtreecommitdiff
path: root/drivers/media/video/gspca/stv0680.c
blob: 4e4f86cd5bb0ed19f666cbab337827577f245334 (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
/*
 * STV0680 USB Camera Driver
 *
 * Copyright (C) 2009 Hans de Goede <hdegoede@redhat.com>
 *
 * This module is adapted from the in kernel v4l1 stv680 driver:
 *
 *  STV0680 USB Camera Driver, by Kevin Sisson (kjsisson@bellsouth.net)
 *
 * Thanks to STMicroelectronics for information on the usb commands, and
 * to Steve Miller at STM for his help and encouragement while I was
 * writing this driver.
 *
 * 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 "stv0680"

#include "gspca.h"

MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_DESCRIPTION("STV0680 USB Camera Driver");
MODULE_LICENSE("GPL");

/* specific webcam descriptor */
struct sd {
	struct gspca_dev gspca_dev;		/* !! must be the first item */
	struct v4l2_pix_format mode;
	u8 orig_mode;
	u8 video_mode;
	u8 current_mode;
};

/* V4L2 controls supported by the driver */
static const struct ctrl sd_ctrls[] = {
};

static int stv_sndctrl(struct gspca_dev *gspca_dev, int set, u8 req, u16 val,
		       int size)
{
	int ret = -1;
	u8 req_type = 0;
	unsigned int pipe = 0;

	switch (set) {
	case 0: /*  0xc1  */
		req_type = USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
		pipe = usb_rcvctrlpipe(gspca_dev->dev, 0);
		break;
	case 1: /*  0x41  */
		req_type = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
		pipe = usb_sndctrlpipe(gspca_dev->dev, 0);
		break;
	case 2:	/*  0x80  */
		req_type = USB_DIR_IN | USB_RECIP_DEVICE;
		pipe = usb_rcvctrlpipe(gspca_dev->dev, 0);
		break;
	case 3:	/*  0x40  */
		req_type = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
		pipe = usb_sndctrlpipe(gspca_dev->dev, 0);
		break;
	}

	ret = usb_control_msg(gspca_dev->dev, pipe,
			      req, req_type,
			      val, 0, gspca_dev->usb_buf, size, 500);

	if ((ret < 0) && (req != 0x0a))
		pr_err("usb_control_msg error %i, request = 0x%x, error = %i\n",
		       set, req, ret);

	return ret;
}

static int stv0680_handle_error(struct gspca_dev *gspca_dev, int ret)
{
	stv_sndctrl(gspca_dev, 0, 0x80, 0, 0x02); /* Get Last Error */
	PDEBUG(D_ERR, "last error: %i,  command = 0x%x",
	       gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]);
	return ret;
}

static int stv0680_get_video_mode(struct gspca_dev *gspca_dev)
{
	/* Note not sure if this init of usb_buf is really necessary */
	memset(gspca_dev->usb_buf, 0, 8);
	gspca_dev->usb_buf[0] = 0x0f;

	if (stv_sndctrl(gspca_dev, 0, 0x87, 0, 0x08) != 0x08) {
		PDEBUG(D_ERR, "Get_Camera_Mode failed");
		return stv0680_handle_error(gspca_dev, -EIO);
	}

	return gspca_dev->usb_buf[0]; /* 01 = VGA, 03 = QVGA, 00 = CIF */
}

static int stv0680_set_video_mode(struct gspca_dev *gspca_dev, u8 mode)
{
	struct sd *sd = (struct sd *) gspca_dev;

	if (sd->current_mode == mode)
		return 0;

	memset(gspca_dev->usb_buf, 0, 8);
	gspca_dev->usb_buf[0] = mode;

	if (stv_sndctrl(gspca_dev, 3, 0x07, 0x0100, 0x08) != 0x08) {
		PDEBUG(D_ERR, "Set_Camera_Mode failed");
		return stv0680_handle_error(gspca_dev, -EIO);
	}

	/* Verify we got what we've asked for */
	if (stv0680_get_video_mode(gspca_dev) != mode) {
		PDEBUG(D_ERR, "Error setting camera video mode!");
		return -EIO;
	}

	sd->current_mode = mode;

	return 0;
}

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

	/* Give the camera some time to settle, otherwise initalization will
	   fail on hotplug, and yes it really needs a full second. */
	msleep(1000);

	/* ping camera to be sure STV0680 is present */
	if (stv_sndctrl(gspca_dev, 0, 0x88, 0x5678, 0x02) != 0x02 ||
	    gspca_dev->usb_buf[0] != 0x56 || gspca_dev->usb_buf[1] != 0x78) {
		PDEBUG(D_ERR, "STV(e): camera ping failed!!");
		return stv0680_handle_error(gspca_dev, -ENODEV);
	}

	/* get camera descriptor */
	if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0200, 0x09) != 0x09)
		return stv0680_handle_error(gspca_dev, -ENODEV);

	if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0200, 0x22) != 0x22 ||
	    gspca_dev->usb_buf[7] != 0xa0 || gspca_dev->usb_buf[8] != 0x23) {
		PDEBUG(D_ERR, "Could not get descriptor 0200.");
		return stv0680_handle_error(gspca_dev, -ENODEV);
	}
	if (stv_sndctrl(gspca_dev, 0, 0x8a, 0, 0x02) != 0x02)
		return stv0680_handle_error(gspca_dev, -ENODEV);
	if (stv_sndctrl(gspca_dev, 0, 0x8b, 0, 0x24) != 0x24)
		return stv0680_handle_error(gspca_dev, -ENODEV);
	if (stv_sndctrl(gspca_dev, 0, 0x85, 0, 0x10) != 0x10)
		return stv0680_handle_error(gspca_dev, -ENODEV);

	if (!(gspca_dev->usb_buf[7] & 0x09)) {
		PDEBUG(D_ERR, "Camera supports neither CIF nor QVGA mode");
		return -ENODEV;
	}
	if (gspca_dev->usb_buf[7] & 0x01)
		PDEBUG(D_PROBE, "Camera supports CIF mode");
	if (gspca_dev->usb_buf[7] & 0x02)
		PDEBUG(D_PROBE, "Camera supports VGA mode");
	if (gspca_dev->usb_buf[7] & 0x04)
		PDEBUG(D_PROBE, "Camera supports QCIF mode");
	if (gspca_dev->usb_buf[7] & 0x08)
		PDEBUG(D_PROBE, "Camera supports QVGA mode");

	if (gspca_dev->usb_buf[7] & 0x01)
		sd->video_mode = 0x00; /* CIF */
	else
		sd->video_mode = 0x03; /* QVGA */

	/* FW rev, ASIC rev, sensor ID  */
	PDEBUG(D_PROBE, "Firmware rev is %i.%i",
	       gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]);
	PDEBUG(D_PROBE, "ASIC rev is %i.%i",
	       gspca_dev->usb_buf[2], gspca_dev->usb_buf[3]);
	PDEBUG(D_PROBE, "Sensor ID is %i",
	       (gspca_dev->usb_buf[4]*16) + (gspca_dev->usb_buf[5]>>4));


	ret = stv0680_get_video_mode(gspca_dev);
	if (ret < 0)
		return ret;
	sd->current_mode = sd->orig_mode = ret;

	ret = stv0680_set_video_mode(gspca_dev, sd->video_mode);
	if (ret < 0)
		return ret;

	/* Get mode details */
	if (stv_sndctrl(gspca_dev, 0, 0x8f, 0, 0x10) != 0x10)
		return stv0680_handle_error(gspca_dev, -EIO);

	cam->bulk = 1;
	cam->bulk_nurbs = 1; /* The cam cannot handle more */
	cam->bulk_size = (gspca_dev->usb_buf[0] << 24) |
			 (gspca_dev->usb_buf[1] << 16) |
			 (gspca_dev->usb_buf[2] << 8) |
			 (gspca_dev->usb_buf[3]);
	sd->mode.width = (gspca_dev->usb_buf[4] << 8) |
			 (gspca_dev->usb_buf[5]);  /* 322, 356, 644 */
	sd->mode.height = (gspca_dev->usb_buf[6] << 8) |
			  (gspca_dev->usb_buf[7]); /* 242, 292, 484 */
	sd->mode.pixelformat = V4L2_PIX_FMT_STV0680;
	sd->mode.field = V4L2_FIELD_NONE;
	sd->mode.bytesperline = sd->mode.width;
	sd->mode.sizeimage = cam->bulk_size;
	sd->mode.colorspace = V4L2_COLORSPACE_SRGB;

	/* origGain = gspca_dev->usb_buf[12]; */

	cam->cam_mode = &sd->mode;
	cam->nmodes = 1;


	ret = stv0680_set_video_mode(gspca_dev, sd->orig_mode);
	if (ret < 0)
		return ret;

	if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0100, 0x12) != 0x12 ||
	    gspca_dev->usb_buf[8] != 0x53 || gspca_dev->usb_buf[9] != 0x05) {
		pr_err("Could not get descriptor 0100\n");
		return stv0680_handle_error(gspca_dev, -EIO);
	}

	return 0;
}

/* this function is called at probe and resume time */
static int sd_init(struct gspca_dev *gspca_dev)
{
	return 0;
}

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

	ret = stv0680_set_video_mode(gspca_dev, sd->video_mode);
	if (ret < 0)
		return ret;

	if (stv_sndctrl(gspca_dev, 0, 0x85, 0, 0x10) != 0x10)
		return stv0680_handle_error(gspca_dev, -EIO);

	/* Start stream at:
	   0x0000 = CIF (352x288)
	   0x0100 = VGA (640x480)
	   0x0300 = QVGA (320x240) */
	if (stv_sndctrl(gspca_dev, 1, 0x09, sd->video_mode << 8, 0x0) != 0x0)
		return stv0680_handle_error(gspca_dev, -EIO);

	return 0;
}

static void sd_stopN(struct gspca_dev *gspca_dev)
{
	/* This is a high priority command; it stops all lower order cmds */
	if (stv_sndctrl(gspca_dev, 1, 0x04, 0x0000, 0x0) != 0x0)
		stv0680_handle_error(gspca_dev, -EIO);
}

static void sd_stop0(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;

	if (!sd->gspca_dev.present)
		return;

	stv0680_set_video_mode(gspca_dev, sd->orig_mode);
}

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

	/* Every now and then the camera sends a 16 byte packet, no idea
	   what it contains, but it is not image data, when this
	   happens the frame received before this packet is corrupt,
	   so discard it. */
	if (len != sd->mode.sizeimage) {
		gspca_dev->last_packet_type = DISCARD_PACKET;
		return;
	}

	/* Finish the previous frame, we do this upon reception of the next
	   packet, even though it is already complete so that the strange 16
	   byte packets send after a corrupt frame can discard it. */
	gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);

	/* Store the just received frame */
	gspca_frame_add(gspca_dev, FIRST_PACKET, data, len);
}

/* 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,
	.stop0 = sd_stop0,
	.pkt_scan = sd_pkt_scan,
};

/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
	{USB_DEVICE(0x0553, 0x0202)},
	{USB_DEVICE(0x041e, 0x4007)},
	{}
};
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);