Version:  2.6.34 2.6.35 2.6.36 2.6.37 2.6.38 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14

Linux/drivers/media/usb/gspca/stv0680.c

  1 /*
  2  * STV0680 USB Camera Driver
  3  *
  4  * Copyright (C) 2009 Hans de Goede <hdegoede@redhat.com>
  5  *
  6  * This module is adapted from the in kernel v4l1 stv680 driver:
  7  *
  8  *  STV0680 USB Camera Driver, by Kevin Sisson (kjsisson@bellsouth.net)
  9  *
 10  * Thanks to STMicroelectronics for information on the usb commands, and
 11  * to Steve Miller at STM for his help and encouragement while I was
 12  * writing this driver.
 13  *
 14  * This program is free software; you can redistribute it and/or modify
 15  * it under the terms of the GNU General Public License as published by
 16  * the Free Software Foundation; either version 2 of the License, or
 17  * (at your option) any later version.
 18  *
 19  * This program is distributed in the hope that it will be useful,
 20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 22  * GNU General Public License for more details.
 23  *
 24  * You should have received a copy of the GNU General Public License
 25  * along with this program; if not, write to the Free Software
 26  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 27  *
 28  */
 29 
 30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 31 
 32 #define MODULE_NAME "stv0680"
 33 
 34 #include "gspca.h"
 35 
 36 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
 37 MODULE_DESCRIPTION("STV0680 USB Camera Driver");
 38 MODULE_LICENSE("GPL");
 39 
 40 /* specific webcam descriptor */
 41 struct sd {
 42         struct gspca_dev gspca_dev;             /* !! must be the first item */
 43         struct v4l2_pix_format mode;
 44         u8 orig_mode;
 45         u8 video_mode;
 46         u8 current_mode;
 47 };
 48 
 49 static int stv_sndctrl(struct gspca_dev *gspca_dev, int set, u8 req, u16 val,
 50                        int size)
 51 {
 52         int ret = -1;
 53         u8 req_type = 0;
 54         unsigned int pipe = 0;
 55 
 56         switch (set) {
 57         case 0: /*  0xc1  */
 58                 req_type = USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
 59                 pipe = usb_rcvctrlpipe(gspca_dev->dev, 0);
 60                 break;
 61         case 1: /*  0x41  */
 62                 req_type = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
 63                 pipe = usb_sndctrlpipe(gspca_dev->dev, 0);
 64                 break;
 65         case 2: /*  0x80  */
 66                 req_type = USB_DIR_IN | USB_RECIP_DEVICE;
 67                 pipe = usb_rcvctrlpipe(gspca_dev->dev, 0);
 68                 break;
 69         case 3: /*  0x40  */
 70                 req_type = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
 71                 pipe = usb_sndctrlpipe(gspca_dev->dev, 0);
 72                 break;
 73         }
 74 
 75         ret = usb_control_msg(gspca_dev->dev, pipe,
 76                               req, req_type,
 77                               val, 0, gspca_dev->usb_buf, size, 500);
 78 
 79         if ((ret < 0) && (req != 0x0a))
 80                 pr_err("usb_control_msg error %i, request = 0x%x, error = %i\n",
 81                        set, req, ret);
 82 
 83         return ret;
 84 }
 85 
 86 static int stv0680_handle_error(struct gspca_dev *gspca_dev, int ret)
 87 {
 88         stv_sndctrl(gspca_dev, 0, 0x80, 0, 0x02); /* Get Last Error */
 89         PERR("last error: %i,  command = 0x%x",
 90                gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]);
 91         return ret;
 92 }
 93 
 94 static int stv0680_get_video_mode(struct gspca_dev *gspca_dev)
 95 {
 96         /* Note not sure if this init of usb_buf is really necessary */
 97         memset(gspca_dev->usb_buf, 0, 8);
 98         gspca_dev->usb_buf[0] = 0x0f;
 99 
100         if (stv_sndctrl(gspca_dev, 0, 0x87, 0, 0x08) != 0x08) {
101                 PERR("Get_Camera_Mode failed");
102                 return stv0680_handle_error(gspca_dev, -EIO);
103         }
104 
105         return gspca_dev->usb_buf[0]; /* 01 = VGA, 03 = QVGA, 00 = CIF */
106 }
107 
108 static int stv0680_set_video_mode(struct gspca_dev *gspca_dev, u8 mode)
109 {
110         struct sd *sd = (struct sd *) gspca_dev;
111 
112         if (sd->current_mode == mode)
113                 return 0;
114 
115         memset(gspca_dev->usb_buf, 0, 8);
116         gspca_dev->usb_buf[0] = mode;
117 
118         if (stv_sndctrl(gspca_dev, 3, 0x07, 0x0100, 0x08) != 0x08) {
119                 PERR("Set_Camera_Mode failed");
120                 return stv0680_handle_error(gspca_dev, -EIO);
121         }
122 
123         /* Verify we got what we've asked for */
124         if (stv0680_get_video_mode(gspca_dev) != mode) {
125                 PERR("Error setting camera video mode!");
126                 return -EIO;
127         }
128 
129         sd->current_mode = mode;
130 
131         return 0;
132 }
133 
134 /* this function is called at probe time */
135 static int sd_config(struct gspca_dev *gspca_dev,
136                         const struct usb_device_id *id)
137 {
138         int ret;
139         struct sd *sd = (struct sd *) gspca_dev;
140         struct cam *cam = &gspca_dev->cam;
141 
142         /* Give the camera some time to settle, otherwise initialization will
143            fail on hotplug, and yes it really needs a full second. */
144         msleep(1000);
145 
146         /* ping camera to be sure STV0680 is present */
147         if (stv_sndctrl(gspca_dev, 0, 0x88, 0x5678, 0x02) != 0x02 ||
148             gspca_dev->usb_buf[0] != 0x56 || gspca_dev->usb_buf[1] != 0x78) {
149                 PERR("STV(e): camera ping failed!!");
150                 return stv0680_handle_error(gspca_dev, -ENODEV);
151         }
152 
153         /* get camera descriptor */
154         if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0200, 0x09) != 0x09)
155                 return stv0680_handle_error(gspca_dev, -ENODEV);
156 
157         if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0200, 0x22) != 0x22 ||
158             gspca_dev->usb_buf[7] != 0xa0 || gspca_dev->usb_buf[8] != 0x23) {
159                 PERR("Could not get descriptor 0200.");
160                 return stv0680_handle_error(gspca_dev, -ENODEV);
161         }
162         if (stv_sndctrl(gspca_dev, 0, 0x8a, 0, 0x02) != 0x02)
163                 return stv0680_handle_error(gspca_dev, -ENODEV);
164         if (stv_sndctrl(gspca_dev, 0, 0x8b, 0, 0x24) != 0x24)
165                 return stv0680_handle_error(gspca_dev, -ENODEV);
166         if (stv_sndctrl(gspca_dev, 0, 0x85, 0, 0x10) != 0x10)
167                 return stv0680_handle_error(gspca_dev, -ENODEV);
168 
169         if (!(gspca_dev->usb_buf[7] & 0x09)) {
170                 PERR("Camera supports neither CIF nor QVGA mode");
171                 return -ENODEV;
172         }
173         if (gspca_dev->usb_buf[7] & 0x01)
174                 PDEBUG(D_PROBE, "Camera supports CIF mode");
175         if (gspca_dev->usb_buf[7] & 0x02)
176                 PDEBUG(D_PROBE, "Camera supports VGA mode");
177         if (gspca_dev->usb_buf[7] & 0x04)
178                 PDEBUG(D_PROBE, "Camera supports QCIF mode");
179         if (gspca_dev->usb_buf[7] & 0x08)
180                 PDEBUG(D_PROBE, "Camera supports QVGA mode");
181 
182         if (gspca_dev->usb_buf[7] & 0x01)
183                 sd->video_mode = 0x00; /* CIF */
184         else
185                 sd->video_mode = 0x03; /* QVGA */
186 
187         /* FW rev, ASIC rev, sensor ID  */
188         PDEBUG(D_PROBE, "Firmware rev is %i.%i",
189                gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]);
190         PDEBUG(D_PROBE, "ASIC rev is %i.%i",
191                gspca_dev->usb_buf[2], gspca_dev->usb_buf[3]);
192         PDEBUG(D_PROBE, "Sensor ID is %i",
193                (gspca_dev->usb_buf[4]*16) + (gspca_dev->usb_buf[5]>>4));
194 
195 
196         ret = stv0680_get_video_mode(gspca_dev);
197         if (ret < 0)
198                 return ret;
199         sd->current_mode = sd->orig_mode = ret;
200 
201         ret = stv0680_set_video_mode(gspca_dev, sd->video_mode);
202         if (ret < 0)
203                 return ret;
204 
205         /* Get mode details */
206         if (stv_sndctrl(gspca_dev, 0, 0x8f, 0, 0x10) != 0x10)
207                 return stv0680_handle_error(gspca_dev, -EIO);
208 
209         cam->bulk = 1;
210         cam->bulk_nurbs = 1; /* The cam cannot handle more */
211         cam->bulk_size = (gspca_dev->usb_buf[0] << 24) |
212                          (gspca_dev->usb_buf[1] << 16) |
213                          (gspca_dev->usb_buf[2] << 8) |
214                          (gspca_dev->usb_buf[3]);
215         sd->mode.width = (gspca_dev->usb_buf[4] << 8) |
216                          (gspca_dev->usb_buf[5]);  /* 322, 356, 644 */
217         sd->mode.height = (gspca_dev->usb_buf[6] << 8) |
218                           (gspca_dev->usb_buf[7]); /* 242, 292, 484 */
219         sd->mode.pixelformat = V4L2_PIX_FMT_STV0680;
220         sd->mode.field = V4L2_FIELD_NONE;
221         sd->mode.bytesperline = sd->mode.width;
222         sd->mode.sizeimage = cam->bulk_size;
223         sd->mode.colorspace = V4L2_COLORSPACE_SRGB;
224 
225         /* origGain = gspca_dev->usb_buf[12]; */
226 
227         cam->cam_mode = &sd->mode;
228         cam->nmodes = 1;
229 
230 
231         ret = stv0680_set_video_mode(gspca_dev, sd->orig_mode);
232         if (ret < 0)
233                 return ret;
234 
235         if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0100, 0x12) != 0x12 ||
236             gspca_dev->usb_buf[8] != 0x53 || gspca_dev->usb_buf[9] != 0x05) {
237                 pr_err("Could not get descriptor 0100\n");
238                 return stv0680_handle_error(gspca_dev, -EIO);
239         }
240 
241         return 0;
242 }
243 
244 /* this function is called at probe and resume time */
245 static int sd_init(struct gspca_dev *gspca_dev)
246 {
247         return 0;
248 }
249 
250 /* -- start the camera -- */
251 static int sd_start(struct gspca_dev *gspca_dev)
252 {
253         int ret;
254         struct sd *sd = (struct sd *) gspca_dev;
255 
256         ret = stv0680_set_video_mode(gspca_dev, sd->video_mode);
257         if (ret < 0)
258                 return ret;
259 
260         if (stv_sndctrl(gspca_dev, 0, 0x85, 0, 0x10) != 0x10)
261                 return stv0680_handle_error(gspca_dev, -EIO);
262 
263         /* Start stream at:
264            0x0000 = CIF (352x288)
265            0x0100 = VGA (640x480)
266            0x0300 = QVGA (320x240) */
267         if (stv_sndctrl(gspca_dev, 1, 0x09, sd->video_mode << 8, 0x0) != 0x0)
268                 return stv0680_handle_error(gspca_dev, -EIO);
269 
270         return 0;
271 }
272 
273 static void sd_stopN(struct gspca_dev *gspca_dev)
274 {
275         /* This is a high priority command; it stops all lower order cmds */
276         if (stv_sndctrl(gspca_dev, 1, 0x04, 0x0000, 0x0) != 0x0)
277                 stv0680_handle_error(gspca_dev, -EIO);
278 }
279 
280 static void sd_stop0(struct gspca_dev *gspca_dev)
281 {
282         struct sd *sd = (struct sd *) gspca_dev;
283 
284         if (!sd->gspca_dev.present)
285                 return;
286 
287         stv0680_set_video_mode(gspca_dev, sd->orig_mode);
288 }
289 
290 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
291                         u8 *data,
292                         int len)
293 {
294         struct sd *sd = (struct sd *) gspca_dev;
295 
296         /* Every now and then the camera sends a 16 byte packet, no idea
297            what it contains, but it is not image data, when this
298            happens the frame received before this packet is corrupt,
299            so discard it. */
300         if (len != sd->mode.sizeimage) {
301                 gspca_dev->last_packet_type = DISCARD_PACKET;
302                 return;
303         }
304 
305         /* Finish the previous frame, we do this upon reception of the next
306            packet, even though it is already complete so that the strange 16
307            byte packets send after a corrupt frame can discard it. */
308         gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0);
309 
310         /* Store the just received frame */
311         gspca_frame_add(gspca_dev, FIRST_PACKET, data, len);
312 }
313 
314 /* sub-driver description */
315 static const struct sd_desc sd_desc = {
316         .name = MODULE_NAME,
317         .config = sd_config,
318         .init = sd_init,
319         .start = sd_start,
320         .stopN = sd_stopN,
321         .stop0 = sd_stop0,
322         .pkt_scan = sd_pkt_scan,
323 };
324 
325 /* -- module initialisation -- */
326 static const struct usb_device_id device_table[] = {
327         {USB_DEVICE(0x0553, 0x0202)},
328         {USB_DEVICE(0x041e, 0x4007)},
329         {}
330 };
331 MODULE_DEVICE_TABLE(usb, device_table);
332 
333 /* -- device connect -- */
334 static int sd_probe(struct usb_interface *intf,
335                         const struct usb_device_id *id)
336 {
337         return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
338                                 THIS_MODULE);
339 }
340 
341 static struct usb_driver sd_driver = {
342         .name = MODULE_NAME,
343         .id_table = device_table,
344         .probe = sd_probe,
345         .disconnect = gspca_disconnect,
346 #ifdef CONFIG_PM
347         .suspend = gspca_suspend,
348         .resume = gspca_resume,
349         .reset_resume = gspca_resume,
350 #endif
351 };
352 
353 module_usb_driver(sd_driver);
354 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us