Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6] / drivers / media / video / gspca / tv8532.c
1 /*
2  * Quickcam cameras initialization data
3  *
4  * V4L2 by Jean-Francois Moine <http://moinejf.free.fr>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  *
20  */
21 #define MODULE_NAME "tv8532"
22
23 #include "gspca.h"
24
25 MODULE_AUTHOR("Michel Xhaard <mxhaard@users.sourceforge.net>");
26 MODULE_DESCRIPTION("TV8532 USB Camera Driver");
27 MODULE_LICENSE("GPL");
28
29 /* specific webcam descriptor */
30 struct sd {
31         struct gspca_dev gspca_dev;     /* !! must be the first item */
32
33         int buflen;                     /* current length of tmpbuf */
34         __u8 tmpbuf[352 * 288 + 10 * 288];      /* no protection... */
35         __u8 tmpbuf2[352 * 288];                /* no protection... */
36
37         unsigned short brightness;
38         unsigned short contrast;
39
40         char packet;
41         char synchro;
42 };
43
44 /* V4L2 controls supported by the driver */
45 static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val);
46 static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val);
47 static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val);
48 static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val);
49
50 static struct ctrl sd_ctrls[] = {
51 #define SD_BRIGHTNESS 0
52         {
53          {
54           .id = V4L2_CID_BRIGHTNESS,
55           .type = V4L2_CTRL_TYPE_INTEGER,
56           .name = "Brightness",
57           .minimum = 1,
58           .maximum = 0x2ff,
59           .step = 1,
60           .default_value = 0x18f,
61           },
62          .set = sd_setbrightness,
63          .get = sd_getbrightness,
64          },
65 #define SD_CONTRAST 1
66         {
67          {
68           .id = V4L2_CID_CONTRAST,
69           .type = V4L2_CTRL_TYPE_INTEGER,
70           .name = "Contrast",
71           .minimum = 0,
72           .maximum = 0xffff,
73           .step = 1,
74           .default_value = 0x7fff,
75           },
76          .set = sd_setcontrast,
77          .get = sd_getcontrast,
78          },
79 };
80
81 static struct v4l2_pix_format sif_mode[] = {
82         {176, 144, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
83                 .bytesperline = 176,
84                 .sizeimage = 176 * 144,
85                 .colorspace = V4L2_COLORSPACE_SRGB,
86                 .priv = 1},
87         {352, 288, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE,
88                 .bytesperline = 352,
89                 .sizeimage = 352 * 288,
90                 .colorspace = V4L2_COLORSPACE_SRGB,
91                 .priv = 0},
92 };
93
94 /*
95  * Initialization data: this is the first set-up data written to the
96  * device (before the open data).
97  */
98 #define TESTCLK 0x10            /* reg 0x2c -> 0x12 //10 */
99 #define TESTCOMP 0x90           /* reg 0x28 -> 0x80 */
100 #define TESTLINE 0x81           /* reg 0x29 -> 0x81 */
101 #define QCIFLINE 0x41           /* reg 0x29 -> 0x81 */
102 #define TESTPTL 0x14            /* reg 0x2D -> 0x14 */
103 #define TESTPTH 0x01            /* reg 0x2E -> 0x01 */
104 #define TESTPTBL 0x12           /* reg 0x2F -> 0x0a */
105 #define TESTPTBH 0x01           /* reg 0x30 -> 0x01 */
106 #define ADWIDTHL 0xe8           /* reg 0x0c -> 0xe8 */
107 #define ADWIDTHH 0x03           /* reg 0x0d -> 0x03 */
108 #define ADHEIGHL 0x90           /* reg 0x0e -> 0x91 //93 */
109 #define ADHEIGHH 0x01           /* reg 0x0f -> 0x01 */
110 #define EXPOL 0x8f              /* reg 0x1c -> 0x8f */
111 #define EXPOH 0x01              /* reg 0x1d -> 0x01 */
112 #define ADCBEGINL 0x44          /* reg 0x10 -> 0x46 //47 */
113 #define ADCBEGINH 0x00          /* reg 0x11 -> 0x00 */
114 #define ADRBEGINL 0x0a          /* reg 0x14 -> 0x0b //0x0c */
115 #define ADRBEGINH 0x00          /* reg 0x15 -> 0x00 */
116 #define TV8532_CMD_UPDATE 0x84
117
118 #define TV8532_EEprom_Add 0x03
119 #define TV8532_EEprom_DataL 0x04
120 #define TV8532_EEprom_DataM 0x05
121 #define TV8532_EEprom_DataH 0x06
122 #define TV8532_EEprom_TableLength 0x07
123 #define TV8532_EEprom_Write 0x08
124 #define TV8532_PART_CTRL 0x00
125 #define TV8532_CTRL 0x01
126 #define TV8532_CMD_EEprom_Open 0x30
127 #define TV8532_CMD_EEprom_Close 0x29
128 #define TV8532_UDP_UPDATE 0x31
129 #define TV8532_GPIO 0x39
130 #define TV8532_GPIO_OE 0x3B
131 #define TV8532_REQ_RegWrite 0x02
132 #define TV8532_REQ_RegRead 0x03
133
134 #define TV8532_ADWIDTH_L 0x0C
135 #define TV8532_ADWIDTH_H 0x0D
136 #define TV8532_ADHEIGHT_L 0x0E
137 #define TV8532_ADHEIGHT_H 0x0F
138 #define TV8532_EXPOSURE 0x1C
139 #define TV8532_QUANT_COMP 0x28
140 #define TV8532_MODE_PACKET 0x29
141 #define TV8532_SETCLK 0x2C
142 #define TV8532_POINT_L 0x2D
143 #define TV8532_POINT_H 0x2E
144 #define TV8532_POINTB_L 0x2F
145 #define TV8532_POINTB_H 0x30
146 #define TV8532_BUDGET_L 0x2A
147 #define TV8532_BUDGET_H 0x2B
148 #define TV8532_VID_L 0x34
149 #define TV8532_VID_H 0x35
150 #define TV8532_PID_L 0x36
151 #define TV8532_PID_H 0x37
152 #define TV8532_DeviceID 0x83
153 #define TV8532_AD_SLOPE 0x91
154 #define TV8532_AD_BITCTRL 0x94
155 #define TV8532_AD_COLBEGIN_L 0x10
156 #define TV8532_AD_COLBEGIN_H 0x11
157 #define TV8532_AD_ROWBEGIN_L 0x14
158 #define TV8532_AD_ROWBEGIN_H 0x15
159
160 static const __u32 tv_8532_eeprom_data[] = {
161 /*      add             dataL      dataM        dataH */
162         0x00010001, 0x01018011, 0x02050014, 0x0305001c,
163         0x040d001e, 0x0505001f, 0x06050519, 0x0705011b,
164         0x0805091e, 0x090d892e, 0x0a05892f, 0x0b050dd9,
165         0x0c0509f1, 0
166 };
167
168 static int reg_r(struct gspca_dev *gspca_dev,
169                  __u16 index)
170 {
171         usb_control_msg(gspca_dev->dev,
172                         usb_rcvctrlpipe(gspca_dev->dev, 0),
173                         TV8532_REQ_RegRead,
174                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
175                         0,      /* value */
176                         index, gspca_dev->usb_buf, 1,
177                         500);
178         return gspca_dev->usb_buf[0];
179 }
180
181 /* write 1 byte */
182 static void reg_w_1(struct gspca_dev *gspca_dev,
183                   __u16 index, __u8 value)
184 {
185         gspca_dev->usb_buf[0] = value;
186         usb_control_msg(gspca_dev->dev,
187                         usb_sndctrlpipe(gspca_dev->dev, 0),
188                         TV8532_REQ_RegWrite,
189                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
190                         0,      /* value */
191                         index, gspca_dev->usb_buf, 1, 500);
192 }
193
194 /* write 2 bytes */
195 static void reg_w_2(struct gspca_dev *gspca_dev,
196                   __u16 index, __u8 val1, __u8 val2)
197 {
198         gspca_dev->usb_buf[0] = val1;
199         gspca_dev->usb_buf[1] = val2;
200         usb_control_msg(gspca_dev->dev,
201                         usb_sndctrlpipe(gspca_dev->dev, 0),
202                         TV8532_REQ_RegWrite,
203                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
204                         0,      /* value */
205                         index, gspca_dev->usb_buf, 2, 500);
206 }
207
208 static void tv_8532WriteEEprom(struct gspca_dev *gspca_dev)
209 {
210         int i = 0;
211         __u8 reg, data0, data1, data2;
212
213         reg_w_1(gspca_dev, TV8532_GPIO, 0xb0);
214         reg_w_1(gspca_dev, TV8532_CTRL, TV8532_CMD_EEprom_Open);
215 /*      msleep(1); */
216         while (tv_8532_eeprom_data[i]) {
217                 reg = (tv_8532_eeprom_data[i] & 0xff000000) >> 24;
218                 reg_w_1(gspca_dev, TV8532_EEprom_Add, reg);
219                 /* msleep(1); */
220                 data0 = (tv_8532_eeprom_data[i] & 0x000000ff);
221                 reg_w_1(gspca_dev, TV8532_EEprom_DataL, data0);
222                 /* msleep(1); */
223                 data1 = (tv_8532_eeprom_data[i] & 0x0000ff00) >> 8;
224                 reg_w_1(gspca_dev, TV8532_EEprom_DataM, data1);
225                 /* msleep(1); */
226                 data2 = (tv_8532_eeprom_data[i] & 0x00ff0000) >> 16;
227                 reg_w_1(gspca_dev, TV8532_EEprom_DataH, data2);
228                 /* msleep(1); */
229                 reg_w_1(gspca_dev, TV8532_EEprom_Write, 0);
230                 /* msleep(10); */
231                 i++;
232         }
233         reg_w_1(gspca_dev, TV8532_EEprom_TableLength, i);
234 /*      msleep(1); */
235         reg_w_1(gspca_dev, TV8532_CTRL, TV8532_CMD_EEprom_Close);
236         msleep(10);
237 }
238
239 /* this function is called at probe time */
240 static int sd_config(struct gspca_dev *gspca_dev,
241                      const struct usb_device_id *id)
242 {
243         struct sd *sd = (struct sd *) gspca_dev;
244         struct cam *cam;
245
246         tv_8532WriteEEprom(gspca_dev);
247
248         cam = &gspca_dev->cam;
249         cam->epaddr = 1;
250         cam->cam_mode = sif_mode;
251         cam->nmodes = sizeof sif_mode / sizeof sif_mode[0];
252
253         sd->brightness = sd_ctrls[SD_BRIGHTNESS].qctrl.default_value;
254         sd->contrast = sd_ctrls[SD_CONTRAST].qctrl.default_value;
255         return 0;
256 }
257
258 static void tv_8532ReadRegisters(struct gspca_dev *gspca_dev)
259 {
260         __u8 data;
261
262         data = reg_r(gspca_dev, 0x0001);
263         PDEBUG(D_USBI, "register 0x01-> %x", data);
264         data = reg_r(gspca_dev, 0x0002);
265         PDEBUG(D_USBI, "register 0x02-> %x", data);
266         reg_r(gspca_dev, TV8532_ADWIDTH_L);
267         reg_r(gspca_dev, TV8532_ADWIDTH_H);
268         reg_r(gspca_dev, TV8532_QUANT_COMP);
269         reg_r(gspca_dev, TV8532_MODE_PACKET);
270         reg_r(gspca_dev, TV8532_SETCLK);
271         reg_r(gspca_dev, TV8532_POINT_L);
272         reg_r(gspca_dev, TV8532_POINT_H);
273         reg_r(gspca_dev, TV8532_POINTB_L);
274         reg_r(gspca_dev, TV8532_POINTB_H);
275         reg_r(gspca_dev, TV8532_BUDGET_L);
276         reg_r(gspca_dev, TV8532_BUDGET_H);
277         reg_r(gspca_dev, TV8532_VID_L);
278         reg_r(gspca_dev, TV8532_VID_H);
279         reg_r(gspca_dev, TV8532_PID_L);
280         reg_r(gspca_dev, TV8532_PID_H);
281         reg_r(gspca_dev, TV8532_DeviceID);
282         reg_r(gspca_dev, TV8532_AD_COLBEGIN_L);
283         reg_r(gspca_dev, TV8532_AD_COLBEGIN_H);
284         reg_r(gspca_dev, TV8532_AD_ROWBEGIN_L);
285         reg_r(gspca_dev, TV8532_AD_ROWBEGIN_H);
286 }
287
288 static void tv_8532_setReg(struct gspca_dev *gspca_dev)
289 {
290         reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_L,
291                         ADCBEGINL);                     /* 0x10 */
292         reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_H,
293                         ADCBEGINH);                     /* also digital gain */
294         reg_w_1(gspca_dev, TV8532_PART_CTRL,
295                         TV8532_CMD_UPDATE);             /* 0x00<-0x84 */
296
297         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0a);
298         /******************************************************/
299         reg_w_1(gspca_dev, TV8532_ADHEIGHT_L, ADHEIGHL); /* 0e */
300         reg_w_1(gspca_dev, TV8532_ADHEIGHT_H, ADHEIGHH); /* 0f */
301         reg_w_2(gspca_dev, TV8532_EXPOSURE,
302                         EXPOL, EXPOH);                  /* 350d 0x014c; 1c */
303         reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_L,
304                         ADCBEGINL);                     /* 0x10 */
305         reg_w_1(gspca_dev, TV8532_AD_COLBEGIN_H,
306                         ADCBEGINH);                     /* also digital gain */
307         reg_w_1(gspca_dev, TV8532_AD_ROWBEGIN_L,
308                         ADRBEGINL);                     /* 0x14 */
309
310         reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x00);      /* 0x91 */
311         reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x02);    /* 0x94 */
312
313         reg_w_1(gspca_dev, TV8532_CTRL,
314                         TV8532_CMD_EEprom_Close);       /* 0x01 */
315
316         reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x00);      /* 0x91 */
317         reg_w_1(gspca_dev, TV8532_PART_CTRL,
318                         TV8532_CMD_UPDATE);             /* 0x00<-0x84 */
319 }
320
321 static void tv_8532_PollReg(struct gspca_dev *gspca_dev)
322 {
323         int i;
324
325         /* strange polling from tgc */
326         for (i = 0; i < 10; i++) {
327                 reg_w_1(gspca_dev, TV8532_SETCLK,
328                         TESTCLK);               /* 0x48; //0x08; 0x2c */
329                 reg_w_1(gspca_dev, TV8532_PART_CTRL, TV8532_CMD_UPDATE);
330                 reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01);    /* 0x31 */
331         }
332 }
333
334 /* this function is called at probe and resume time */
335 static int sd_init(struct gspca_dev *gspca_dev)
336 {
337         reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x32);
338         reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x00);
339         tv_8532ReadRegisters(gspca_dev);
340         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
341         reg_w_2(gspca_dev, TV8532_ADHEIGHT_L, ADHEIGHL,
342                                 ADHEIGHH);      /* 401d 0x0169; 0e */
343         reg_w_2(gspca_dev, TV8532_EXPOSURE, EXPOL,
344                                 EXPOH);         /* 350d 0x014c; 1c */
345         reg_w_1(gspca_dev, TV8532_ADWIDTH_L, ADWIDTHL); /* 0x20; 0x0c */
346         reg_w_1(gspca_dev, TV8532_ADWIDTH_H, ADWIDTHH); /* 0x0d */
347
348         /*******************************************************************/
349         reg_w_1(gspca_dev, TV8532_QUANT_COMP,
350                         TESTCOMP);      /* 0x72 compressed mode 0x28 */
351         reg_w_1(gspca_dev, TV8532_MODE_PACKET,
352                         TESTLINE);      /* 0x84; // CIF | 4 packet 0x29 */
353
354         /************************************************/
355         reg_w_1(gspca_dev, TV8532_SETCLK,
356                         TESTCLK);               /* 0x48; //0x08; 0x2c */
357         reg_w_1(gspca_dev, TV8532_POINT_L,
358                         TESTPTL);               /* 0x38; 0x2d */
359         reg_w_1(gspca_dev, TV8532_POINT_H,
360                         TESTPTH);               /* 0x04; 0x2e */
361         reg_w_1(gspca_dev, TV8532_POINTB_L,
362                         TESTPTBL);              /* 0x04; 0x2f */
363         reg_w_1(gspca_dev, TV8532_POINTB_H,
364                         TESTPTBH);              /* 0x04; 0x30 */
365         reg_w_1(gspca_dev, TV8532_PART_CTRL,
366                         TV8532_CMD_UPDATE);     /* 0x00<-0x84 */
367         /*************************************************/
368         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01);    /* 0x31 */
369         msleep(200);
370         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00);    /* 0x31 */
371         /*************************************************/
372         tv_8532_setReg(gspca_dev);
373         /*************************************************/
374         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
375         /*************************************************/
376         tv_8532_setReg(gspca_dev);
377         /*************************************************/
378         tv_8532_PollReg(gspca_dev);
379         return 0;
380 }
381
382 static void setbrightness(struct gspca_dev *gspca_dev)
383 {
384         struct sd *sd = (struct sd *) gspca_dev;
385         int brightness = sd->brightness;
386
387         reg_w_2(gspca_dev, TV8532_EXPOSURE,
388                 brightness >> 8, brightness);           /* 1c */
389         reg_w_1(gspca_dev, TV8532_PART_CTRL, TV8532_CMD_UPDATE);
390 }
391
392 /* -- start the camera -- */
393 static int sd_start(struct gspca_dev *gspca_dev)
394 {
395         reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x32);
396         reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x00);
397         tv_8532ReadRegisters(gspca_dev);
398         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
399         reg_w_2(gspca_dev, TV8532_ADHEIGHT_L,
400                 ADHEIGHL, ADHEIGHH);    /* 401d 0x0169; 0e */
401 /*      reg_w_2(gspca_dev, TV8532_EXPOSURE,
402                 EXPOL, EXPOH);           * 350d 0x014c; 1c */
403         setbrightness(gspca_dev);
404
405         reg_w_1(gspca_dev, TV8532_ADWIDTH_L, ADWIDTHL); /* 0x20; 0x0c */
406         reg_w_1(gspca_dev, TV8532_ADWIDTH_H, ADWIDTHH); /* 0x0d */
407
408         /************************************************/
409         reg_w_1(gspca_dev, TV8532_QUANT_COMP,
410                         TESTCOMP);      /* 0x72 compressed mode 0x28 */
411         if (gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv) {
412                 /* 176x144 */
413                 reg_w_1(gspca_dev, TV8532_MODE_PACKET,
414                         QCIFLINE);      /* 0x84; // CIF | 4 packet 0x29 */
415         } else {
416                 /* 352x288 */
417                 reg_w_1(gspca_dev, TV8532_MODE_PACKET,
418                         TESTLINE);      /* 0x84; // CIF | 4 packet 0x29 */
419         }
420         /************************************************/
421         reg_w_1(gspca_dev, TV8532_SETCLK,
422                         TESTCLK);               /* 0x48; //0x08; 0x2c */
423         reg_w_1(gspca_dev, TV8532_POINT_L,
424                         TESTPTL);               /* 0x38; 0x2d */
425         reg_w_1(gspca_dev, TV8532_POINT_H,
426                         TESTPTH);               /* 0x04; 0x2e */
427         reg_w_1(gspca_dev, TV8532_POINTB_L,
428                         TESTPTBL);              /* 0x04; 0x2f */
429         reg_w_1(gspca_dev, TV8532_POINTB_H,
430                         TESTPTBH);              /* 0x04; 0x30 */
431         reg_w_1(gspca_dev, TV8532_PART_CTRL,
432                         TV8532_CMD_UPDATE);     /* 0x00<-0x84 */
433         /************************************************/
434         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x01);    /* 0x31 */
435         msleep(200);
436         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00);    /* 0x31 */
437         /************************************************/
438         tv_8532_setReg(gspca_dev);
439         /************************************************/
440         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
441         /************************************************/
442         tv_8532_setReg(gspca_dev);
443         /************************************************/
444         tv_8532_PollReg(gspca_dev);
445         reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00);    /* 0x31 */
446         return 0;
447 }
448
449 static void sd_stopN(struct gspca_dev *gspca_dev)
450 {
451         reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b);
452 }
453
454 static void tv8532_preprocess(struct gspca_dev *gspca_dev)
455 {
456         struct sd *sd = (struct sd *) gspca_dev;
457 /* we should received a whole frame with header and EOL marker
458  * in gspca_dev->tmpbuf and return a GBRG pattern in gspca_dev->tmpbuf2
459  * sequence 2bytes header the Alternate pixels bayer GB 4 bytes
460  * Alternate pixels bayer RG 4 bytes EOL */
461         int width = gspca_dev->width;
462         int height = gspca_dev->height;
463         unsigned char *dst = sd->tmpbuf2;
464         unsigned char *data = sd->tmpbuf;
465         int i;
466
467         /* precompute where is the good bayer line */
468         if (((data[3] + data[width + 7]) >> 1)
469             + (data[4] >> 2)
470             + (data[width + 6] >> 1) >= ((data[2] + data[width + 6]) >> 1)
471             + (data[3] >> 2)
472             + (data[width + 5] >> 1))
473                 data += 3;
474         else
475                 data += 2;
476         for (i = 0; i < height / 2; i++) {
477                 memcpy(dst, data, width);
478                 data += width + 3;
479                 dst += width;
480                 memcpy(dst, data, width);
481                 data += width + 7;
482                 dst += width;
483         }
484 }
485
486 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
487                         struct gspca_frame *frame,      /* target */
488                         __u8 *data,                     /* isoc packet */
489                         int len)                        /* iso packet length */
490 {
491         struct sd *sd = (struct sd *) gspca_dev;
492
493         if (data[0] != 0x80) {
494                 sd->packet++;
495                 if (sd->buflen + len > sizeof sd->tmpbuf) {
496                         if (gspca_dev->last_packet_type != DISCARD_PACKET) {
497                                 PDEBUG(D_PACK, "buffer overflow");
498                                 gspca_dev->last_packet_type = DISCARD_PACKET;
499                         }
500                         return;
501                 }
502                 memcpy(&sd->tmpbuf[sd->buflen], data, len);
503                 sd->buflen += len;
504                 return;
505         }
506
507         /* here we detect 0x80 */
508         /* counter is limited so we need few header for a frame :) */
509
510         /* header 0x80 0x80 0x80 0x80 0x80 */
511         /* packet  00   63  127  145  00   */
512         /* sof     0     1   1    0    0   */
513
514         /* update sequence */
515         if (sd->packet == 63 || sd->packet == 127)
516                 sd->synchro = 1;
517
518         /* is there a frame start ? */
519         if (sd->packet >= (gspca_dev->height >> 1) - 1) {
520                 PDEBUG(D_PACK, "SOF > %d packet %d", sd->synchro,
521                        sd->packet);
522                 if (!sd->synchro) {     /* start of frame */
523                         if (gspca_dev->last_packet_type == FIRST_PACKET) {
524                                 tv8532_preprocess(gspca_dev);
525                                 frame = gspca_frame_add(gspca_dev,
526                                                         LAST_PACKET,
527                                                         frame, sd->tmpbuf2,
528                                                         gspca_dev->width *
529                                                             gspca_dev->width);
530                         }
531                         gspca_frame_add(gspca_dev, FIRST_PACKET,
532                                         frame, data, 0);
533                         memcpy(sd->tmpbuf, data, len);
534                         sd->buflen = len;
535                         sd->packet = 0;
536                         return;
537                 }
538                 if (gspca_dev->last_packet_type != DISCARD_PACKET) {
539                         PDEBUG(D_PACK,
540                                "Warning wrong TV8532 frame detection %d",
541                                sd->packet);
542                         gspca_dev->last_packet_type = DISCARD_PACKET;
543                 }
544                 return;
545         }
546
547         if (!sd->synchro) {
548                 /* Drop packet frame corrupt */
549                 PDEBUG(D_PACK, "DROP SOF %d packet %d",
550                        sd->synchro, sd->packet);
551                 sd->packet = 0;
552                 gspca_dev->last_packet_type = DISCARD_PACKET;
553                 return;
554         }
555         sd->synchro = 1;
556         sd->packet++;
557         memcpy(&sd->tmpbuf[sd->buflen], data, len);
558         sd->buflen += len;
559 }
560
561 static void setcontrast(struct gspca_dev *gspca_dev)
562 {
563 }
564
565 static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val)
566 {
567         struct sd *sd = (struct sd *) gspca_dev;
568
569         sd->brightness = val;
570         if (gspca_dev->streaming)
571                 setbrightness(gspca_dev);
572         return 0;
573 }
574
575 static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val)
576 {
577         struct sd *sd = (struct sd *) gspca_dev;
578
579         *val = sd->brightness;
580         return 0;
581 }
582
583 static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val)
584 {
585         struct sd *sd = (struct sd *) gspca_dev;
586
587         sd->contrast = val;
588         if (gspca_dev->streaming)
589                 setcontrast(gspca_dev);
590         return 0;
591 }
592
593 static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val)
594 {
595         struct sd *sd = (struct sd *) gspca_dev;
596
597         *val = sd->contrast;
598         return 0;
599 }
600
601 /* sub-driver description */
602 static const struct sd_desc sd_desc = {
603         .name = MODULE_NAME,
604         .ctrls = sd_ctrls,
605         .nctrls = ARRAY_SIZE(sd_ctrls),
606         .config = sd_config,
607         .init = sd_init,
608         .start = sd_start,
609         .stopN = sd_stopN,
610         .pkt_scan = sd_pkt_scan,
611 };
612
613 /* -- module initialisation -- */
614 static const __devinitdata struct usb_device_id device_table[] = {
615         {USB_DEVICE(0x046d, 0x0920)},
616         {USB_DEVICE(0x046d, 0x0921)},
617         {USB_DEVICE(0x0545, 0x808b)},
618         {USB_DEVICE(0x0545, 0x8333)},
619         {USB_DEVICE(0x0923, 0x010f)},
620         {}
621 };
622
623 MODULE_DEVICE_TABLE(usb, device_table);
624
625 /* -- device connect -- */
626 static int sd_probe(struct usb_interface *intf,
627                     const struct usb_device_id *id)
628 {
629         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
630                                THIS_MODULE);
631 }
632
633 static struct usb_driver sd_driver = {
634         .name = MODULE_NAME,
635         .id_table = device_table,
636         .probe = sd_probe,
637         .disconnect = gspca_disconnect,
638 #ifdef CONFIG_PM
639         .suspend = gspca_suspend,
640         .resume = gspca_resume,
641 #endif
642 };
643
644 /* -- module insert / remove -- */
645 static int __init sd_mod_init(void)
646 {
647         if (usb_register(&sd_driver) < 0)
648                 return -1;
649         PDEBUG(D_PROBE, "registered");
650         return 0;
651 }
652
653 static void __exit sd_mod_exit(void)
654 {
655         usb_deregister(&sd_driver);
656         PDEBUG(D_PROBE, "deregistered");
657 }
658
659 module_init(sd_mod_init);
660 module_exit(sd_mod_exit);