2 * ov534/ov772x gspca driver
3 * Copyright (C) 2008 Antonio Ospite <ospite@studenti.unina.it>
4 * Copyright (C) 2008 Jim Paris <jim@jtan.com>
6 * Based on a prototype written by Mark Ferrell <majortrips@gmail.com>
7 * USB protocol reverse engineered by Jim Paris <jim@jtan.com>
8 * https://jim.sh/svn/jim/devl/playstation/ps3/eye/test/
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #define MODULE_NAME "ov534"
29 #define OV534_REG_ADDRESS 0xf1 /* ? */
30 #define OV534_REG_SUBADDR 0xf2
31 #define OV534_REG_WRITE 0xf3
32 #define OV534_REG_READ 0xf4
33 #define OV534_REG_OPERATION 0xf5
34 #define OV534_REG_STATUS 0xf6
36 #define OV534_OP_WRITE_3 0x37
37 #define OV534_OP_WRITE_2 0x33
38 #define OV534_OP_READ_2 0xf9
40 #define CTRL_TIMEOUT 500
42 MODULE_AUTHOR("Antonio Ospite <ospite@studenti.unina.it>");
43 MODULE_DESCRIPTION("GSPCA/OV534 USB Camera Driver");
44 MODULE_LICENSE("GPL");
46 /* specific webcam descriptor */
48 struct gspca_dev gspca_dev; /* !! must be the first item */
54 /* V4L2 controls supported by the driver */
55 static struct ctrl sd_ctrls[] = {
58 static struct v4l2_pix_format vga_mode[] = {
59 {640, 480, V4L2_PIX_FMT_YUYV, V4L2_FIELD_NONE,
60 .bytesperline = 640 * 2,
61 .sizeimage = 640 * 480 * 2,
62 .colorspace = V4L2_COLORSPACE_JPEG,
66 static void ov534_reg_write(struct usb_device *udev, u16 reg, u8 val)
71 PDEBUG(D_USBO, "reg=0x%04x, val=0%02x", reg, val);
72 ret = usb_control_msg(udev,
73 usb_sndctrlpipe(udev, 0),
75 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
76 0x0, reg, &data, 1, CTRL_TIMEOUT);
78 PDEBUG(D_ERR, "write failed");
81 static u8 ov534_reg_read(struct usb_device *udev, u16 reg)
86 ret = usb_control_msg(udev,
87 usb_rcvctrlpipe(udev, 0),
89 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
90 0x0, reg, &data, 1, CTRL_TIMEOUT);
91 PDEBUG(D_USBI, "reg=0x%04x, data=0x%02x", reg, data);
93 PDEBUG(D_ERR, "read failed");
97 /* Two bits control LED: 0x21 bit 7 and 0x23 bit 7.
98 * (direction and output)? */
99 static void ov534_set_led(struct usb_device *udev, int status)
103 PDEBUG(D_CONF, "led status: %d", status);
105 data = ov534_reg_read(udev, 0x21);
107 ov534_reg_write(udev, 0x21, data);
109 data = ov534_reg_read(udev, 0x23);
115 ov534_reg_write(udev, 0x23, data);
118 static int sccb_check_status(struct usb_device *udev)
123 for (i = 0; i < 5; i++) {
124 data = ov534_reg_read(udev, OV534_REG_STATUS);
134 PDEBUG(D_ERR, "sccb status 0x%02x, attempt %d/5\n",
141 static void sccb_reg_write(struct usb_device *udev, u16 reg, u8 val)
143 PDEBUG(D_USBO, "reg: 0x%04x, val: 0x%02x", reg, val);
144 ov534_reg_write(udev, OV534_REG_SUBADDR, reg);
145 ov534_reg_write(udev, OV534_REG_WRITE, val);
146 ov534_reg_write(udev, OV534_REG_OPERATION, OV534_OP_WRITE_3);
148 if (!sccb_check_status(udev))
149 PDEBUG(D_ERR, "sccb_reg_write failed");
153 static u8 sccb_reg_read(struct usb_device *udev, u16 reg)
155 ov534_reg_write(udev, OV534_REG_SUBADDR, reg);
156 ov534_reg_write(udev, OV534_REG_OPERATION, OV534_OP_WRITE_2);
157 if (!sccb_check_status(udev))
158 PDEBUG(D_ERR, "sccb_reg_read failed 1");
160 ov534_reg_write(udev, OV534_REG_OPERATION, OV534_OP_READ_2);
161 if (!sccb_check_status(udev))
162 PDEBUG(D_ERR, "sccb_reg_read failed 2");
164 return ov534_reg_read(udev, OV534_REG_READ);
168 static const __u8 ov534_reg_initdata[][2] = {
171 { OV534_REG_ADDRESS, 0x42 }, /* select OV772x sensor */
211 { 0x1d, 0x02 }, /* payload size 0x0200 * 4 = 2048 bytes */
212 { 0x1d, 0x00 }, /* payload size */
213 { 0x1d, 0x02 }, /* frame size 0x025800 * 4 = 614400 */
214 { 0x1d, 0x58 }, /* frame size */
215 { 0x1d, 0x00 }, /* frame size */
218 { 0x1d, 0x08 }, /* turn on UVC header */
219 { 0x1d, 0x0e }, /* .. */
230 static const __u8 ov772x_reg_initdata[][2] = {
314 static void ov534_set_frame_rate(struct gspca_dev *gspca_dev)
316 struct sd *sd = (struct sd *) gspca_dev;
317 int fr = sd->frame_rate;
321 sccb_reg_write(gspca_dev->dev, 0x11, 0x01);
322 sccb_reg_write(gspca_dev->dev, 0x0d, 0x41);
323 ov534_reg_write(gspca_dev->dev, 0xe5, 0x02);
326 sccb_reg_write(gspca_dev->dev, 0x11, 0x02);
327 sccb_reg_write(gspca_dev->dev, 0x0d, 0xc1);
328 ov534_reg_write(gspca_dev->dev, 0xe5, 0x04);
333 sccb_reg_write(gspca_dev->dev, 0x11, 0x04);
334 sccb_reg_write(gspca_dev->dev, 0x0d, 0x81);
335 ov534_reg_write(gspca_dev->dev, 0xe5, 0x02);
338 sccb_reg_write(gspca_dev->dev, 0x11, 0x03);
339 sccb_reg_write(gspca_dev->dev, 0x0d, 0x41);
340 ov534_reg_write(gspca_dev->dev, 0xe5, 0x04);
345 PDEBUG(D_PROBE, "frame_rate: %d", fr);
349 static void ov534_setup(struct usb_device *udev)
353 /* Initialize bridge chip */
354 for (i = 0; i < ARRAY_SIZE(ov534_reg_initdata); i++)
355 ov534_reg_write(udev, ov534_reg_initdata[i][0],
356 ov534_reg_initdata[i][1]);
358 PDEBUG(D_PROBE, "sensor is ov%02x%02x",
359 sccb_reg_read(udev, 0x0a), sccb_reg_read(udev, 0x0b));
361 ov534_set_led(udev, 1);
363 /* Initialize sensor */
364 for (i = 0; i < ARRAY_SIZE(ov772x_reg_initdata); i++)
365 sccb_reg_write(udev, ov772x_reg_initdata[i][0],
366 ov772x_reg_initdata[i][1]);
368 ov534_reg_write(udev, 0xe0, 0x09);
369 ov534_set_led(udev, 0);
372 /* this function is called at probe time */
373 static int sd_config(struct gspca_dev *gspca_dev,
374 const struct usb_device_id *id)
378 cam = &gspca_dev->cam;
381 cam->cam_mode = vga_mode;
382 cam->nmodes = ARRAY_SIZE(vga_mode);
384 cam->bulk_size = 16384;
390 /* this function is called at probe and resume time */
391 static int sd_init(struct gspca_dev *gspca_dev)
393 ov534_setup(gspca_dev->dev);
394 ov534_set_frame_rate(gspca_dev);
399 static int sd_start(struct gspca_dev *gspca_dev)
401 /* start streaming data */
402 ov534_set_led(gspca_dev->dev, 1);
403 ov534_reg_write(gspca_dev->dev, 0xe0, 0x00);
408 static void sd_stopN(struct gspca_dev *gspca_dev)
410 /* stop streaming data */
411 ov534_reg_write(gspca_dev->dev, 0xe0, 0x09);
412 ov534_set_led(gspca_dev->dev, 0);
415 /* Values for bmHeaderInfo (Video and Still Image Payload Headers, 2.4.3.3) */
416 #define UVC_STREAM_EOH (1 << 7)
417 #define UVC_STREAM_ERR (1 << 6)
418 #define UVC_STREAM_STI (1 << 5)
419 #define UVC_STREAM_RES (1 << 4)
420 #define UVC_STREAM_SCR (1 << 3)
421 #define UVC_STREAM_PTS (1 << 2)
422 #define UVC_STREAM_EOF (1 << 1)
423 #define UVC_STREAM_FID (1 << 0)
425 static void sd_pkt_scan(struct gspca_dev *gspca_dev, struct gspca_frame *frame,
428 struct sd *sd = (struct sd *) gspca_dev;
431 int remaining_len = len;
432 __u8 *next_data = data;
435 if (remaining_len <= 0)
439 len = min(remaining_len, 2048);
440 remaining_len -= len;
443 /* Payloads are prefixed with a UVC-style header. We
444 consider a frame to start when the FID toggles, or the PTS
445 changes. A frame ends when EOF is set, and we've received
446 the correct number of bytes. */
448 /* Verify UVC header. Header length is always 12 */
449 if (data[0] != 12 || len < 12) {
450 PDEBUG(D_PACK, "bad header");
455 if (data[1] & UVC_STREAM_ERR) {
456 PDEBUG(D_PACK, "payload error");
460 /* Extract PTS and FID */
461 if (!(data[1] & UVC_STREAM_PTS)) {
462 PDEBUG(D_PACK, "PTS not present");
465 this_pts = (data[5] << 24) | (data[4] << 16) | (data[3] << 8) | data[2];
466 this_fid = (data[1] & UVC_STREAM_FID) ? 1 : 0;
468 /* If PTS or FID has changed, start a new frame. */
469 if (this_pts != sd->last_pts || this_fid != sd->last_fid) {
470 gspca_frame_add(gspca_dev, FIRST_PACKET, frame, NULL, 0);
471 sd->last_pts = this_pts;
472 sd->last_fid = this_fid;
475 /* Add the data from this payload */
476 gspca_frame_add(gspca_dev, INTER_PACKET, frame,
477 data + 12, len - 12);
479 /* If this packet is marked as EOF, end the frame */
480 if (data[1] & UVC_STREAM_EOF) {
483 if ((frame->data_end - frame->data) !=
484 (gspca_dev->width * gspca_dev->height * 2)) {
485 PDEBUG(D_PACK, "short frame");
489 gspca_frame_add(gspca_dev, LAST_PACKET, frame, NULL, 0);
492 /* Done this payload */
496 /* Discard data until a new frame starts. */
497 gspca_frame_add(gspca_dev, DISCARD_PACKET, frame, NULL, 0);
501 /* get stream parameters (framerate) */
502 static int sd_get_streamparm(struct gspca_dev *gspca_dev,
503 struct v4l2_streamparm *parm)
505 struct v4l2_captureparm *cp = &parm->parm.capture;
506 struct v4l2_fract *tpf = &cp->timeperframe;
507 struct sd *sd = (struct sd *) gspca_dev;
509 if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
512 cp->capability |= V4L2_CAP_TIMEPERFRAME;
514 tpf->denominator = sd->frame_rate;
519 /* set stream parameters (framerate) */
520 static int sd_set_streamparm(struct gspca_dev *gspca_dev,
521 struct v4l2_streamparm *parm)
523 struct v4l2_captureparm *cp = &parm->parm.capture;
524 struct v4l2_fract *tpf = &cp->timeperframe;
525 struct sd *sd = (struct sd *) gspca_dev;
527 if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
530 /* Set requested framerate */
531 sd->frame_rate = tpf->denominator / tpf->numerator;
532 ov534_set_frame_rate(gspca_dev);
534 /* Return the actual framerate */
536 tpf->denominator = sd->frame_rate;
541 /* sub-driver description */
542 static const struct sd_desc sd_desc = {
545 .nctrls = ARRAY_SIZE(sd_ctrls),
550 .pkt_scan = sd_pkt_scan,
551 .get_streamparm = sd_get_streamparm,
552 .set_streamparm = sd_set_streamparm,
555 /* -- module initialisation -- */
556 static const __devinitdata struct usb_device_id device_table[] = {
557 {USB_DEVICE(0x06f8, 0x3002)}, /* Hercules Blog Webcam */
558 {USB_DEVICE(0x06f8, 0x3003)}, /* Hercules Dualpix HD Weblog */
559 {USB_DEVICE(0x1415, 0x2000)}, /* Sony HD Eye for PS3 (SLEH 00201) */
563 MODULE_DEVICE_TABLE(usb, device_table);
565 /* -- device connect -- */
566 static int sd_probe(struct usb_interface *intf, const struct usb_device_id *id)
568 return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
572 static struct usb_driver sd_driver = {
574 .id_table = device_table,
576 .disconnect = gspca_disconnect,
578 .suspend = gspca_suspend,
579 .resume = gspca_resume,
583 /* -- module insert / remove -- */
584 static int __init sd_mod_init(void)
586 if (usb_register(&sd_driver) < 0)
588 PDEBUG(D_PROBE, "registered");
592 static void __exit sd_mod_exit(void)
594 usb_deregister(&sd_driver);
595 PDEBUG(D_PROBE, "deregistered");
598 module_init(sd_mod_init);
599 module_exit(sd_mod_exit);