4 * Copyright (C) 2010-2011 Jean-Francois Moine (http://moinejf.free.fr)
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
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.
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
21 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23 #define MODULE_NAME "spca1528"
28 MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
29 MODULE_DESCRIPTION("SPCA1528 USB Camera Driver");
30 MODULE_LICENSE("GPL");
32 /* specific webcam descriptor */
34 struct gspca_dev gspca_dev; /* !! must be the first item */
38 u8 jpeg_hdr[JPEG_HDR_SZ];
41 static const struct v4l2_pix_format vga_mode[] = {
42 /* (does not work correctly)
43 {176, 144, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
45 .sizeimage = 176 * 144 * 5 / 8 + 590,
46 .colorspace = V4L2_COLORSPACE_JPEG,
49 {320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
51 .sizeimage = 320 * 240 * 4 / 8 + 590,
52 .colorspace = V4L2_COLORSPACE_JPEG,
54 {640, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
56 .sizeimage = 640 * 480 * 3 / 8 + 590,
57 .colorspace = V4L2_COLORSPACE_JPEG,
61 /* read <len> bytes to gspca usb_buf */
62 static void reg_r(struct gspca_dev *gspca_dev,
68 #error "USB buffer too small"
70 struct usb_device *dev = gspca_dev->dev;
73 if (gspca_dev->usb_err < 0)
75 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
77 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
80 gspca_dev->usb_buf, len,
82 PDEBUG(D_USBI, "GET %02x 0000 %04x %02x", req, index,
83 gspca_dev->usb_buf[0]);
85 pr_err("reg_r err %d\n", ret);
86 gspca_dev->usb_err = ret;
88 * Make sure the buffer is zeroed to avoid uninitialized
91 memset(gspca_dev->usb_buf, 0, USB_BUF_SZ);
95 static void reg_w(struct gspca_dev *gspca_dev,
100 struct usb_device *dev = gspca_dev->dev;
103 if (gspca_dev->usb_err < 0)
105 PDEBUG(D_USBO, "SET %02x %04x %04x", req, value, index);
106 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
108 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
112 pr_err("reg_w err %d\n", ret);
113 gspca_dev->usb_err = ret;
117 static void reg_wb(struct gspca_dev *gspca_dev,
123 struct usb_device *dev = gspca_dev->dev;
126 if (gspca_dev->usb_err < 0)
128 PDEBUG(D_USBO, "SET %02x %04x %04x %02x", req, value, index, byte);
129 gspca_dev->usb_buf[0] = byte;
130 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
132 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
134 gspca_dev->usb_buf, 1, 500);
136 pr_err("reg_w err %d\n", ret);
137 gspca_dev->usb_err = ret;
141 static void wait_status_0(struct gspca_dev *gspca_dev)
148 reg_r(gspca_dev, 0x21, 0x0000, 1);
149 if (gspca_dev->usb_buf[0] == 0)
154 PERR("wait_status_0 timeout");
155 gspca_dev->usb_err = -ETIME;
158 static void wait_status_1(struct gspca_dev *gspca_dev)
164 reg_r(gspca_dev, 0x21, 0x0001, 1);
166 if (gspca_dev->usb_buf[0] == 1) {
167 reg_wb(gspca_dev, 0x21, 0x0000, 0x0001, 0x00);
168 reg_r(gspca_dev, 0x21, 0x0001, 1);
172 PERR("wait_status_1 timeout");
173 gspca_dev->usb_err = -ETIME;
176 static void setbrightness(struct gspca_dev *gspca_dev, s32 val)
178 reg_wb(gspca_dev, 0xc0, 0x0000, 0x00c0, val);
181 static void setcontrast(struct gspca_dev *gspca_dev, s32 val)
183 reg_wb(gspca_dev, 0xc1, 0x0000, 0x00c1, val);
186 static void sethue(struct gspca_dev *gspca_dev, s32 val)
188 reg_wb(gspca_dev, 0xc2, 0x0000, 0x0000, val);
191 static void setcolor(struct gspca_dev *gspca_dev, s32 val)
193 reg_wb(gspca_dev, 0xc3, 0x0000, 0x00c3, val);
196 static void setsharpness(struct gspca_dev *gspca_dev, s32 val)
198 reg_wb(gspca_dev, 0xc4, 0x0000, 0x00c4, val);
201 /* this function is called at probe time */
202 static int sd_config(struct gspca_dev *gspca_dev,
203 const struct usb_device_id *id)
205 gspca_dev->cam.cam_mode = vga_mode;
206 gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
207 gspca_dev->cam.npkt = 128; /* number of packets per ISOC message */
208 /*fixme: 256 in ms-win traces*/
213 /* this function is called at probe and resume time */
214 static int sd_init(struct gspca_dev *gspca_dev)
216 reg_w(gspca_dev, 0x00, 0x0001, 0x2067);
217 reg_w(gspca_dev, 0x00, 0x00d0, 0x206b);
218 reg_w(gspca_dev, 0x00, 0x0000, 0x206c);
219 reg_w(gspca_dev, 0x00, 0x0001, 0x2069);
221 reg_w(gspca_dev, 0x00, 0x00c0, 0x206b);
222 reg_w(gspca_dev, 0x00, 0x0000, 0x206c);
223 reg_w(gspca_dev, 0x00, 0x0001, 0x2069);
225 reg_r(gspca_dev, 0x20, 0x0000, 1);
226 reg_r(gspca_dev, 0x20, 0x0000, 5);
227 reg_r(gspca_dev, 0x23, 0x0000, 64);
228 PDEBUG(D_PROBE, "%s%s", &gspca_dev->usb_buf[0x1c],
229 &gspca_dev->usb_buf[0x30]);
230 reg_r(gspca_dev, 0x23, 0x0001, 64);
231 return gspca_dev->usb_err;
234 /* function called at start time before URB creation */
235 static int sd_isoc_init(struct gspca_dev *gspca_dev)
239 reg_r(gspca_dev, 0x00, 0x2520, 1);
240 wait_status_0(gspca_dev);
241 reg_w(gspca_dev, 0xc5, 0x0003, 0x0000);
242 wait_status_1(gspca_dev);
244 wait_status_0(gspca_dev);
245 mode = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
246 reg_wb(gspca_dev, 0x25, 0x0000, 0x0004, mode);
247 reg_r(gspca_dev, 0x25, 0x0004, 1);
248 reg_wb(gspca_dev, 0x27, 0x0000, 0x0000, 0x06); /* 420 */
249 reg_r(gspca_dev, 0x27, 0x0000, 1);
252 gspca_dev->alt = 4; * use alternate setting 3 */
254 return gspca_dev->usb_err;
257 /* -- start the camera -- */
258 static int sd_start(struct gspca_dev *gspca_dev)
260 struct sd *sd = (struct sd *) gspca_dev;
262 /* initialize the JPEG header */
263 jpeg_define(sd->jpeg_hdr, gspca_dev->pixfmt.height,
264 gspca_dev->pixfmt.width,
265 0x22); /* JPEG 411 */
267 /* the JPEG quality shall be 85% */
268 jpeg_set_qual(sd->jpeg_hdr, 85);
270 reg_r(gspca_dev, 0x00, 0x2520, 1);
273 /* start the capture */
274 wait_status_0(gspca_dev);
275 reg_w(gspca_dev, 0x31, 0x0000, 0x0004); /* start request */
276 wait_status_1(gspca_dev);
277 wait_status_0(gspca_dev);
281 return gspca_dev->usb_err;
284 static void sd_stopN(struct gspca_dev *gspca_dev)
286 /* stop the capture */
287 wait_status_0(gspca_dev);
288 reg_w(gspca_dev, 0x31, 0x0000, 0x0000); /* stop request */
289 wait_status_1(gspca_dev);
290 wait_status_0(gspca_dev);
293 /* move a packet adding 0x00 after 0xff */
294 static void add_packet(struct gspca_dev *gspca_dev,
302 if (data[i] == 0xff) {
303 gspca_frame_add(gspca_dev, INTER_PACKET,
311 gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
314 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
315 u8 *data, /* isoc packet */
316 int len) /* iso packet length */
318 struct sd *sd = (struct sd *) gspca_dev;
319 static const u8 ffd9[] = {0xff, 0xd9};
321 /* image packets start with:
324 * 0x01: even (0) / odd (1) image
325 * 0x02: end of image when set
328 return; /* empty packet */
330 if (data[1] & 0x02) {
331 sd->pkt_seq = !(data[1] & 1);
332 add_packet(gspca_dev, data + 2, len - 2);
333 gspca_frame_add(gspca_dev, LAST_PACKET,
337 if ((data[1] & 1) != sd->pkt_seq)
339 if (gspca_dev->last_packet_type == LAST_PACKET)
340 gspca_frame_add(gspca_dev, FIRST_PACKET,
341 sd->jpeg_hdr, JPEG_HDR_SZ);
342 add_packet(gspca_dev, data + 2, len - 2);
346 gspca_dev->last_packet_type = DISCARD_PACKET;
349 static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
351 struct gspca_dev *gspca_dev =
352 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
354 gspca_dev->usb_err = 0;
356 if (!gspca_dev->streaming)
360 case V4L2_CID_BRIGHTNESS:
361 setbrightness(gspca_dev, ctrl->val);
363 case V4L2_CID_CONTRAST:
364 setcontrast(gspca_dev, ctrl->val);
367 sethue(gspca_dev, ctrl->val);
369 case V4L2_CID_SATURATION:
370 setcolor(gspca_dev, ctrl->val);
372 case V4L2_CID_SHARPNESS:
373 setsharpness(gspca_dev, ctrl->val);
376 return gspca_dev->usb_err;
379 static const struct v4l2_ctrl_ops sd_ctrl_ops = {
383 static int sd_init_controls(struct gspca_dev *gspca_dev)
385 struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
387 gspca_dev->vdev.ctrl_handler = hdl;
388 v4l2_ctrl_handler_init(hdl, 5);
389 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
390 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
391 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
392 V4L2_CID_CONTRAST, 0, 8, 1, 1);
393 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
394 V4L2_CID_HUE, 0, 255, 1, 0);
395 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
396 V4L2_CID_SATURATION, 0, 8, 1, 1);
397 v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
398 V4L2_CID_SHARPNESS, 0, 255, 1, 0);
401 pr_err("Could not initialize controls\n");
407 /* sub-driver description */
408 static const struct sd_desc sd_desc = {
412 .init_controls = sd_init_controls,
413 .isoc_init = sd_isoc_init,
416 .pkt_scan = sd_pkt_scan,
419 /* -- module initialisation -- */
420 static const struct usb_device_id device_table[] = {
421 {USB_DEVICE(0x04fc, 0x1528)},
424 MODULE_DEVICE_TABLE(usb, device_table);
426 /* -- device connect -- */
427 static int sd_probe(struct usb_interface *intf,
428 const struct usb_device_id *id)
430 /* the video interface for isochronous transfer is 1 */
431 if (intf->cur_altsetting->desc.bInterfaceNumber != 1)
434 return gspca_dev_probe2(intf, id, &sd_desc, sizeof(struct sd),
438 static struct usb_driver sd_driver = {
440 .id_table = device_table,
442 .disconnect = gspca_disconnect,
444 .suspend = gspca_suspend,
445 .resume = gspca_resume,
446 .reset_resume = gspca_resume,
450 module_usb_driver(sd_driver);