2 * STV0680 USB Camera Driver
4 * Copyright (C) 2009 Hans de Goede <hdegoede@redhat.com>
6 * This module is adapted from the in kernel v4l1 stv680 driver:
8 * STV0680 USB Camera Driver, by Kevin Sisson (kjsisson@bellsouth.net)
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.
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.
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.
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
30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
32 #define MODULE_NAME "stv0680"
36 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
37 MODULE_DESCRIPTION("STV0680 USB Camera Driver");
38 MODULE_LICENSE("GPL");
40 /* specific webcam descriptor */
42 struct gspca_dev gspca_dev; /* !! must be the first item */
43 struct v4l2_pix_format mode;
49 static int stv_sndctrl(struct gspca_dev *gspca_dev, int set, u8 req, u16 val,
54 unsigned int pipe = 0;
58 req_type = USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
59 pipe = usb_rcvctrlpipe(gspca_dev->dev, 0);
62 req_type = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
63 pipe = usb_sndctrlpipe(gspca_dev->dev, 0);
66 req_type = USB_DIR_IN | USB_RECIP_DEVICE;
67 pipe = usb_rcvctrlpipe(gspca_dev->dev, 0);
70 req_type = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
71 pipe = usb_sndctrlpipe(gspca_dev->dev, 0);
75 ret = usb_control_msg(gspca_dev->dev, pipe,
77 val, 0, gspca_dev->usb_buf, size, 500);
79 if ((ret < 0) && (req != 0x0a))
80 pr_err("usb_control_msg error %i, request = 0x%x, error = %i\n",
86 static int stv0680_handle_error(struct gspca_dev *gspca_dev, int ret)
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]);
94 static int stv0680_get_video_mode(struct gspca_dev *gspca_dev)
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;
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);
105 return gspca_dev->usb_buf[0]; /* 01 = VGA, 03 = QVGA, 00 = CIF */
108 static int stv0680_set_video_mode(struct gspca_dev *gspca_dev, u8 mode)
110 struct sd *sd = (struct sd *) gspca_dev;
112 if (sd->current_mode == mode)
115 memset(gspca_dev->usb_buf, 0, 8);
116 gspca_dev->usb_buf[0] = mode;
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);
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!");
129 sd->current_mode = mode;
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)
139 struct sd *sd = (struct sd *) gspca_dev;
140 struct cam *cam = &gspca_dev->cam;
142 /* Give the camera some time to settle, otherwise initialization will
143 fail on hotplug, and yes it really needs a full second. */
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);
153 /* get camera descriptor */
154 if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0200, 0x09) != 0x09)
155 return stv0680_handle_error(gspca_dev, -ENODEV);
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);
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);
169 if (!(gspca_dev->usb_buf[7] & 0x09)) {
170 PERR("Camera supports neither CIF nor QVGA mode");
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");
182 if (gspca_dev->usb_buf[7] & 0x01)
183 sd->video_mode = 0x00; /* CIF */
185 sd->video_mode = 0x03; /* QVGA */
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));
196 ret = stv0680_get_video_mode(gspca_dev);
199 sd->current_mode = sd->orig_mode = ret;
201 ret = stv0680_set_video_mode(gspca_dev, sd->video_mode);
205 /* Get mode details */
206 if (stv_sndctrl(gspca_dev, 0, 0x8f, 0, 0x10) != 0x10)
207 return stv0680_handle_error(gspca_dev, -EIO);
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;
225 /* origGain = gspca_dev->usb_buf[12]; */
227 cam->cam_mode = &sd->mode;
231 ret = stv0680_set_video_mode(gspca_dev, sd->orig_mode);
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);
244 /* this function is called at probe and resume time */
245 static int sd_init(struct gspca_dev *gspca_dev)
250 /* -- start the camera -- */
251 static int sd_start(struct gspca_dev *gspca_dev)
254 struct sd *sd = (struct sd *) gspca_dev;
256 ret = stv0680_set_video_mode(gspca_dev, sd->video_mode);
260 if (stv_sndctrl(gspca_dev, 0, 0x85, 0, 0x10) != 0x10)
261 return stv0680_handle_error(gspca_dev, -EIO);
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);
273 static void sd_stopN(struct gspca_dev *gspca_dev)
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);
280 static void sd_stop0(struct gspca_dev *gspca_dev)
282 struct sd *sd = (struct sd *) gspca_dev;
284 if (!sd->gspca_dev.present)
287 stv0680_set_video_mode(gspca_dev, sd->orig_mode);
290 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
294 struct sd *sd = (struct sd *) gspca_dev;
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,
300 if (len != sd->mode.sizeimage) {
301 gspca_dev->last_packet_type = DISCARD_PACKET;
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);
310 /* Store the just received frame */
311 gspca_frame_add(gspca_dev, FIRST_PACKET, data, len);
314 /* sub-driver description */
315 static const struct sd_desc sd_desc = {
322 .pkt_scan = sd_pkt_scan,
325 /* -- module initialisation -- */
326 static const struct usb_device_id device_table[] = {
327 {USB_DEVICE(0x0553, 0x0202)},
328 {USB_DEVICE(0x041e, 0x4007)},
331 MODULE_DEVICE_TABLE(usb, device_table);
333 /* -- device connect -- */
334 static int sd_probe(struct usb_interface *intf,
335 const struct usb_device_id *id)
337 return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
341 static struct usb_driver sd_driver = {
343 .id_table = device_table,
345 .disconnect = gspca_disconnect,
347 .suspend = gspca_suspend,
348 .resume = gspca_resume,
349 .reset_resume = gspca_resume,
353 module_usb_driver(sd_driver);