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Linux/drivers/media/usb/gspca/spca1528.c

  1 /*
  2  * spca1528 subdriver
  3  *
  4  * Copyright (C) 2010-2011 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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 22 
 23 #define MODULE_NAME "spca1528"
 24 
 25 #include "gspca.h"
 26 #include "jpeg.h"
 27 
 28 MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
 29 MODULE_DESCRIPTION("SPCA1528 USB Camera Driver");
 30 MODULE_LICENSE("GPL");
 31 
 32 /* specific webcam descriptor */
 33 struct sd {
 34         struct gspca_dev gspca_dev;     /* !! must be the first item */
 35 
 36         u8 pkt_seq;
 37 
 38         u8 jpeg_hdr[JPEG_HDR_SZ];
 39 };
 40 
 41 static const struct v4l2_pix_format vga_mode[] = {
 42 /*              (does not work correctly)
 43         {176, 144, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
 44                 .bytesperline = 176,
 45                 .sizeimage = 176 * 144 * 5 / 8 + 590,
 46                 .colorspace = V4L2_COLORSPACE_JPEG,
 47                 .priv = 3},
 48 */
 49         {320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
 50                 .bytesperline = 320,
 51                 .sizeimage = 320 * 240 * 4 / 8 + 590,
 52                 .colorspace = V4L2_COLORSPACE_JPEG,
 53                 .priv = 2},
 54         {640, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
 55                 .bytesperline = 640,
 56                 .sizeimage = 640 * 480 * 3 / 8 + 590,
 57                 .colorspace = V4L2_COLORSPACE_JPEG,
 58                 .priv = 1},
 59 };
 60 
 61 /* read <len> bytes to gspca usb_buf */
 62 static void reg_r(struct gspca_dev *gspca_dev,
 63                         u8 req,
 64                         u16 index,
 65                         int len)
 66 {
 67 #if USB_BUF_SZ < 64
 68 #error "USB buffer too small"
 69 #endif
 70         struct usb_device *dev = gspca_dev->dev;
 71         int ret;
 72 
 73         if (gspca_dev->usb_err < 0)
 74                 return;
 75         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 76                         req,
 77                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 78                         0x0000,                 /* value */
 79                         index,
 80                         gspca_dev->usb_buf, len,
 81                         500);
 82         PDEBUG(D_USBI, "GET %02x 0000 %04x %02x", req, index,
 83                          gspca_dev->usb_buf[0]);
 84         if (ret < 0) {
 85                 pr_err("reg_r err %d\n", ret);
 86                 gspca_dev->usb_err = ret;
 87         }
 88 }
 89 
 90 static void reg_w(struct gspca_dev *gspca_dev,
 91                         u8 req,
 92                         u16 value,
 93                         u16 index)
 94 {
 95         struct usb_device *dev = gspca_dev->dev;
 96         int ret;
 97 
 98         if (gspca_dev->usb_err < 0)
 99                 return;
100         PDEBUG(D_USBO, "SET %02x %04x %04x", req, value, index);
101         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
102                         req,
103                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
104                         value, index,
105                         NULL, 0, 500);
106         if (ret < 0) {
107                 pr_err("reg_w err %d\n", ret);
108                 gspca_dev->usb_err = ret;
109         }
110 }
111 
112 static void reg_wb(struct gspca_dev *gspca_dev,
113                         u8 req,
114                         u16 value,
115                         u16 index,
116                         u8 byte)
117 {
118         struct usb_device *dev = gspca_dev->dev;
119         int ret;
120 
121         if (gspca_dev->usb_err < 0)
122                 return;
123         PDEBUG(D_USBO, "SET %02x %04x %04x %02x", req, value, index, byte);
124         gspca_dev->usb_buf[0] = byte;
125         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
126                         req,
127                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
128                         value, index,
129                         gspca_dev->usb_buf, 1, 500);
130         if (ret < 0) {
131                 pr_err("reg_w err %d\n", ret);
132                 gspca_dev->usb_err = ret;
133         }
134 }
135 
136 static void wait_status_0(struct gspca_dev *gspca_dev)
137 {
138         int i, w;
139 
140         i = 16;
141         w = 0;
142         do {
143                 reg_r(gspca_dev, 0x21, 0x0000, 1);
144                 if (gspca_dev->usb_buf[0] == 0)
145                         return;
146                 w += 15;
147                 msleep(w);
148         } while (--i > 0);
149         PERR("wait_status_0 timeout");
150         gspca_dev->usb_err = -ETIME;
151 }
152 
153 static void wait_status_1(struct gspca_dev *gspca_dev)
154 {
155         int i;
156 
157         i = 10;
158         do {
159                 reg_r(gspca_dev, 0x21, 0x0001, 1);
160                 msleep(10);
161                 if (gspca_dev->usb_buf[0] == 1) {
162                         reg_wb(gspca_dev, 0x21, 0x0000, 0x0001, 0x00);
163                         reg_r(gspca_dev, 0x21, 0x0001, 1);
164                         return;
165                 }
166         } while (--i > 0);
167         PERR("wait_status_1 timeout");
168         gspca_dev->usb_err = -ETIME;
169 }
170 
171 static void setbrightness(struct gspca_dev *gspca_dev, s32 val)
172 {
173         reg_wb(gspca_dev, 0xc0, 0x0000, 0x00c0, val);
174 }
175 
176 static void setcontrast(struct gspca_dev *gspca_dev, s32 val)
177 {
178         reg_wb(gspca_dev, 0xc1, 0x0000, 0x00c1, val);
179 }
180 
181 static void sethue(struct gspca_dev *gspca_dev, s32 val)
182 {
183         reg_wb(gspca_dev, 0xc2, 0x0000, 0x0000, val);
184 }
185 
186 static void setcolor(struct gspca_dev *gspca_dev, s32 val)
187 {
188         reg_wb(gspca_dev, 0xc3, 0x0000, 0x00c3, val);
189 }
190 
191 static void setsharpness(struct gspca_dev *gspca_dev, s32 val)
192 {
193         reg_wb(gspca_dev, 0xc4, 0x0000, 0x00c4, val);
194 }
195 
196 /* this function is called at probe time */
197 static int sd_config(struct gspca_dev *gspca_dev,
198                         const struct usb_device_id *id)
199 {
200         gspca_dev->cam.cam_mode = vga_mode;
201         gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
202         gspca_dev->cam.npkt = 128; /* number of packets per ISOC message */
203                         /*fixme: 256 in ms-win traces*/
204 
205         return 0;
206 }
207 
208 /* this function is called at probe and resume time */
209 static int sd_init(struct gspca_dev *gspca_dev)
210 {
211         reg_w(gspca_dev, 0x00, 0x0001, 0x2067);
212         reg_w(gspca_dev, 0x00, 0x00d0, 0x206b);
213         reg_w(gspca_dev, 0x00, 0x0000, 0x206c);
214         reg_w(gspca_dev, 0x00, 0x0001, 0x2069);
215         msleep(8);
216         reg_w(gspca_dev, 0x00, 0x00c0, 0x206b);
217         reg_w(gspca_dev, 0x00, 0x0000, 0x206c);
218         reg_w(gspca_dev, 0x00, 0x0001, 0x2069);
219 
220         reg_r(gspca_dev, 0x20, 0x0000, 1);
221         reg_r(gspca_dev, 0x20, 0x0000, 5);
222         reg_r(gspca_dev, 0x23, 0x0000, 64);
223         PDEBUG(D_PROBE, "%s%s", &gspca_dev->usb_buf[0x1c],
224                                 &gspca_dev->usb_buf[0x30]);
225         reg_r(gspca_dev, 0x23, 0x0001, 64);
226         return gspca_dev->usb_err;
227 }
228 
229 /* function called at start time before URB creation */
230 static int sd_isoc_init(struct gspca_dev *gspca_dev)
231 {
232         u8 mode;
233 
234         reg_r(gspca_dev, 0x00, 0x2520, 1);
235         wait_status_0(gspca_dev);
236         reg_w(gspca_dev, 0xc5, 0x0003, 0x0000);
237         wait_status_1(gspca_dev);
238 
239         wait_status_0(gspca_dev);
240         mode = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
241         reg_wb(gspca_dev, 0x25, 0x0000, 0x0004, mode);
242         reg_r(gspca_dev, 0x25, 0x0004, 1);
243         reg_wb(gspca_dev, 0x27, 0x0000, 0x0000, 0x06);  /* 420 */
244         reg_r(gspca_dev, 0x27, 0x0000, 1);
245 
246 /* not useful..
247         gspca_dev->alt = 4;             * use alternate setting 3 */
248 
249         return gspca_dev->usb_err;
250 }
251 
252 /* -- start the camera -- */
253 static int sd_start(struct gspca_dev *gspca_dev)
254 {
255         struct sd *sd = (struct sd *) gspca_dev;
256 
257         /* initialize the JPEG header */
258         jpeg_define(sd->jpeg_hdr, gspca_dev->pixfmt.height,
259                         gspca_dev->pixfmt.width,
260                         0x22);          /* JPEG 411 */
261 
262         /* the JPEG quality shall be 85% */
263         jpeg_set_qual(sd->jpeg_hdr, 85);
264 
265         reg_r(gspca_dev, 0x00, 0x2520, 1);
266         msleep(8);
267 
268         /* start the capture */
269         wait_status_0(gspca_dev);
270         reg_w(gspca_dev, 0x31, 0x0000, 0x0004); /* start request */
271         wait_status_1(gspca_dev);
272         wait_status_0(gspca_dev);
273         msleep(200);
274 
275         sd->pkt_seq = 0;
276         return gspca_dev->usb_err;
277 }
278 
279 static void sd_stopN(struct gspca_dev *gspca_dev)
280 {
281         /* stop the capture */
282         wait_status_0(gspca_dev);
283         reg_w(gspca_dev, 0x31, 0x0000, 0x0000); /* stop request */
284         wait_status_1(gspca_dev);
285         wait_status_0(gspca_dev);
286 }
287 
288 /* move a packet adding 0x00 after 0xff */
289 static void add_packet(struct gspca_dev *gspca_dev,
290                         u8 *data,
291                         int len)
292 {
293         int i;
294 
295         i = 0;
296         do {
297                 if (data[i] == 0xff) {
298                         gspca_frame_add(gspca_dev, INTER_PACKET,
299                                         data, i + 1);
300                         len -= i;
301                         data += i;
302                         *data = 0x00;
303                         i = 0;
304                 }
305         } while (++i < len);
306         gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
307 }
308 
309 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
310                         u8 *data,                       /* isoc packet */
311                         int len)                        /* iso packet length */
312 {
313         struct sd *sd = (struct sd *) gspca_dev;
314         static const u8 ffd9[] = {0xff, 0xd9};
315 
316         /* image packets start with:
317          *      02 8n
318          * with <n> bit:
319          *      0x01: even (0) / odd (1) image
320          *      0x02: end of image when set
321          */
322         if (len < 3)
323                 return;                         /* empty packet */
324         if (*data == 0x02) {
325                 if (data[1] & 0x02) {
326                         sd->pkt_seq = !(data[1] & 1);
327                         add_packet(gspca_dev, data + 2, len - 2);
328                         gspca_frame_add(gspca_dev, LAST_PACKET,
329                                         ffd9, 2);
330                         return;
331                 }
332                 if ((data[1] & 1) != sd->pkt_seq)
333                         goto err;
334                 if (gspca_dev->last_packet_type == LAST_PACKET)
335                         gspca_frame_add(gspca_dev, FIRST_PACKET,
336                                         sd->jpeg_hdr, JPEG_HDR_SZ);
337                 add_packet(gspca_dev, data + 2, len - 2);
338                 return;
339         }
340 err:
341         gspca_dev->last_packet_type = DISCARD_PACKET;
342 }
343 
344 static int sd_s_ctrl(struct v4l2_ctrl *ctrl)
345 {
346         struct gspca_dev *gspca_dev =
347                 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
348 
349         gspca_dev->usb_err = 0;
350 
351         if (!gspca_dev->streaming)
352                 return 0;
353 
354         switch (ctrl->id) {
355         case V4L2_CID_BRIGHTNESS:
356                 setbrightness(gspca_dev, ctrl->val);
357                 break;
358         case V4L2_CID_CONTRAST:
359                 setcontrast(gspca_dev, ctrl->val);
360                 break;
361         case V4L2_CID_HUE:
362                 sethue(gspca_dev, ctrl->val);
363                 break;
364         case V4L2_CID_SATURATION:
365                 setcolor(gspca_dev, ctrl->val);
366                 break;
367         case V4L2_CID_SHARPNESS:
368                 setsharpness(gspca_dev, ctrl->val);
369                 break;
370         }
371         return gspca_dev->usb_err;
372 }
373 
374 static const struct v4l2_ctrl_ops sd_ctrl_ops = {
375         .s_ctrl = sd_s_ctrl,
376 };
377 
378 static int sd_init_controls(struct gspca_dev *gspca_dev)
379 {
380         struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;
381 
382         gspca_dev->vdev.ctrl_handler = hdl;
383         v4l2_ctrl_handler_init(hdl, 5);
384         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
385                         V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
386         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
387                         V4L2_CID_CONTRAST, 0, 8, 1, 1);
388         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
389                         V4L2_CID_HUE, 0, 255, 1, 0);
390         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
391                         V4L2_CID_SATURATION, 0, 8, 1, 1);
392         v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,
393                         V4L2_CID_SHARPNESS, 0, 255, 1, 0);
394 
395         if (hdl->error) {
396                 pr_err("Could not initialize controls\n");
397                 return hdl->error;
398         }
399         return 0;
400 }
401 
402 /* sub-driver description */
403 static const struct sd_desc sd_desc = {
404         .name = MODULE_NAME,
405         .config = sd_config,
406         .init = sd_init,
407         .init_controls = sd_init_controls,
408         .isoc_init = sd_isoc_init,
409         .start = sd_start,
410         .stopN = sd_stopN,
411         .pkt_scan = sd_pkt_scan,
412 };
413 
414 /* -- module initialisation -- */
415 static const struct usb_device_id device_table[] = {
416         {USB_DEVICE(0x04fc, 0x1528)},
417         {}
418 };
419 MODULE_DEVICE_TABLE(usb, device_table);
420 
421 /* -- device connect -- */
422 static int sd_probe(struct usb_interface *intf,
423                         const struct usb_device_id *id)
424 {
425         /* the video interface for isochronous transfer is 1 */
426         if (intf->cur_altsetting->desc.bInterfaceNumber != 1)
427                 return -ENODEV;
428 
429         return gspca_dev_probe2(intf, id, &sd_desc, sizeof(struct sd),
430                                 THIS_MODULE);
431 }
432 
433 static struct usb_driver sd_driver = {
434         .name = MODULE_NAME,
435         .id_table = device_table,
436         .probe = sd_probe,
437         .disconnect = gspca_disconnect,
438 #ifdef CONFIG_PM
439         .suspend = gspca_suspend,
440         .resume = gspca_resume,
441         .reset_resume = gspca_resume,
442 #endif
443 };
444 
445 module_usb_driver(sd_driver);
446 

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