2 * Fujifilm Finepix subdriver
4 * Copyright (C) 2008 Frank Zago
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 "finepix"
27 MODULE_AUTHOR("Frank Zago <frank@zago.net>");
28 MODULE_DESCRIPTION("Fujifilm FinePix USB V4L2 driver");
29 MODULE_LICENSE("GPL");
31 /* Default timeout, in ms */
32 #define FPIX_TIMEOUT 250
34 /* Maximum transfer size to use. The windows driver reads by chunks of
35 * 0x2000 bytes, so do the same. Note: reading more seems to work
37 #define FPIX_MAX_TRANSFER 0x2000
39 /* Structure to hold all of our device specific stuff */
41 struct gspca_dev gspca_dev; /* !! must be the first item */
43 struct work_struct work_struct;
44 struct workqueue_struct *work_thread;
47 /* Delay after which claim the next frame. If the delay is too small,
48 * the camera will return old frames. On the 4800Z, 20ms is bad, 25ms
49 * will fail every 4 or 5 frames, but 30ms is perfect. On the A210,
50 * 30ms is bad while 35ms is perfect. */
51 #define NEXT_FRAME_DELAY 35
53 /* These cameras only support 320x200. */
54 static const struct v4l2_pix_format fpix_mode[1] = {
55 { 320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
57 .sizeimage = 320 * 240 * 3 / 8 + 590,
58 .colorspace = V4L2_COLORSPACE_SRGB,
62 /* send a command to the webcam */
63 static int command(struct gspca_dev *gspca_dev,
64 int order) /* 0: reset, 1: frame request */
66 static u8 order_values[2][12] = {
67 {0xc6, 0, 0, 0, 0, 0, 0, 0, 0x20, 0, 0, 0}, /* reset */
68 {0xd3, 0, 0, 0, 0, 0, 0, 0x01, 0, 0, 0, 0}, /* fr req */
71 memcpy(gspca_dev->usb_buf, order_values[order], 12);
72 return usb_control_msg(gspca_dev->dev,
73 usb_sndctrlpipe(gspca_dev->dev, 0),
75 USB_DIR_OUT | USB_TYPE_CLASS |
76 USB_RECIP_INTERFACE, 0, 0, gspca_dev->usb_buf,
81 static void dostream(struct work_struct *work)
83 struct usb_fpix *dev = container_of(work, struct usb_fpix, work_struct);
84 struct gspca_dev *gspca_dev = &dev->gspca_dev;
85 struct urb *urb = gspca_dev->urb[0];
86 u8 *data = urb->transfer_buffer;
90 /* synchronize with the main driver */
91 mutex_lock(&gspca_dev->usb_lock);
92 mutex_unlock(&gspca_dev->usb_lock);
93 PDEBUG(D_STREAM, "dostream started");
95 /* loop reading a frame */
97 while (gspca_dev->present && gspca_dev->streaming) {
100 mutex_lock(&gspca_dev->usb_lock);
101 ret = command(gspca_dev, 1);
102 mutex_unlock(&gspca_dev->usb_lock);
105 if (!gspca_dev->present || !gspca_dev->streaming)
108 /* the frame comes in parts */
110 ret = usb_bulk_msg(gspca_dev->dev,
116 /* Most of the time we get a timeout
117 * error. Just restart. */
120 if (!gspca_dev->present || !gspca_dev->streaming)
122 if (len < FPIX_MAX_TRANSFER ||
123 (data[len - 2] == 0xff &&
124 data[len - 1] == 0xd9)) {
126 /* If the result is less than what was asked
127 * for, then it's the end of the
128 * frame. Sometimes the jpeg is not complete,
129 * but there's nothing we can do. We also end
130 * here if the the jpeg ends right at the end
132 gspca_frame_add(gspca_dev, LAST_PACKET,
137 /* got a partial image */
138 gspca_frame_add(gspca_dev,
139 gspca_dev->last_packet_type
141 ? FIRST_PACKET : INTER_PACKET,
145 /* We must wait before trying reading the next
146 * frame. If we don't, or if the delay is too short,
147 * the camera will disconnect. */
148 msleep(NEXT_FRAME_DELAY);
152 PDEBUG(D_STREAM, "dostream stopped");
155 /* this function is called at probe time */
156 static int sd_config(struct gspca_dev *gspca_dev,
157 const struct usb_device_id *id)
159 struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
160 struct cam *cam = &gspca_dev->cam;
162 cam->cam_mode = fpix_mode;
165 cam->bulk_size = FPIX_MAX_TRANSFER;
167 INIT_WORK(&dev->work_struct, dostream);
172 /* this function is called at probe and resume time */
173 static int sd_init(struct gspca_dev *gspca_dev)
178 /* start the camera */
179 static int sd_start(struct gspca_dev *gspca_dev)
181 struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
184 /* Init the device */
185 ret = command(gspca_dev, 0);
187 pr_err("init failed %d\n", ret);
191 /* Read the result of the command. Ignore the result, for it
192 * varies with the device. */
193 ret = usb_bulk_msg(gspca_dev->dev,
194 gspca_dev->urb[0]->pipe,
195 gspca_dev->urb[0]->transfer_buffer,
196 FPIX_MAX_TRANSFER, &len,
199 pr_err("usb_bulk_msg failed %d\n", ret);
203 /* Request a frame, but don't read it */
204 ret = command(gspca_dev, 1);
206 pr_err("frame request failed %d\n", ret);
210 /* Again, reset bulk in endpoint */
211 usb_clear_halt(gspca_dev->dev, gspca_dev->urb[0]->pipe);
213 /* Start the workqueue function to do the streaming */
214 dev->work_thread = create_singlethread_workqueue(MODULE_NAME);
215 queue_work(dev->work_thread, &dev->work_struct);
220 /* called on streamoff with alt==0 and on disconnect */
221 /* the usb_lock is held at entry - restore on exit */
222 static void sd_stop0(struct gspca_dev *gspca_dev)
224 struct usb_fpix *dev = (struct usb_fpix *) gspca_dev;
226 /* wait for the work queue to terminate */
227 mutex_unlock(&gspca_dev->usb_lock);
228 destroy_workqueue(dev->work_thread);
229 mutex_lock(&gspca_dev->usb_lock);
230 dev->work_thread = NULL;
233 /* Table of supported USB devices */
234 static const struct usb_device_id device_table[] = {
235 {USB_DEVICE(0x04cb, 0x0104)},
236 {USB_DEVICE(0x04cb, 0x0109)},
237 {USB_DEVICE(0x04cb, 0x010b)},
238 {USB_DEVICE(0x04cb, 0x010f)},
239 {USB_DEVICE(0x04cb, 0x0111)},
240 {USB_DEVICE(0x04cb, 0x0113)},
241 {USB_DEVICE(0x04cb, 0x0115)},
242 {USB_DEVICE(0x04cb, 0x0117)},
243 {USB_DEVICE(0x04cb, 0x0119)},
244 {USB_DEVICE(0x04cb, 0x011b)},
245 {USB_DEVICE(0x04cb, 0x011d)},
246 {USB_DEVICE(0x04cb, 0x0121)},
247 {USB_DEVICE(0x04cb, 0x0123)},
248 {USB_DEVICE(0x04cb, 0x0125)},
249 {USB_DEVICE(0x04cb, 0x0127)},
250 {USB_DEVICE(0x04cb, 0x0129)},
251 {USB_DEVICE(0x04cb, 0x012b)},
252 {USB_DEVICE(0x04cb, 0x012d)},
253 {USB_DEVICE(0x04cb, 0x012f)},
254 {USB_DEVICE(0x04cb, 0x0131)},
255 {USB_DEVICE(0x04cb, 0x013b)},
256 {USB_DEVICE(0x04cb, 0x013d)},
257 {USB_DEVICE(0x04cb, 0x013f)},
261 MODULE_DEVICE_TABLE(usb, device_table);
263 /* sub-driver description */
264 static const struct sd_desc sd_desc = {
272 /* -- device connect -- */
273 static int sd_probe(struct usb_interface *intf,
274 const struct usb_device_id *id)
276 return gspca_dev_probe(intf, id,
278 sizeof(struct usb_fpix),
282 static struct usb_driver sd_driver = {
284 .id_table = device_table,
286 .disconnect = gspca_disconnect,
288 .suspend = gspca_suspend,
289 .resume = gspca_resume,
293 /* -- module insert / remove -- */
294 static int __init sd_mod_init(void)
296 return usb_register(&sd_driver);
299 static void __exit sd_mod_exit(void)
301 usb_deregister(&sd_driver);
304 module_init(sd_mod_init);
305 module_exit(sd_mod_exit);