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hwrng: core - Don't use a stack buffer in add_early_randomness()
[linux/fpc-iii.git] / drivers / media / usb / zr364xx / zr364xx.c
blobcc128db85723c90d1619d774e55af6e747604a5b
1 /*
2 * Zoran 364xx based USB webcam module version 0.73
3 *
4 * Allows you to use your USB webcam with V4L2 applications
5 * This is still in heavy developpement !
6 *
7 * Copyright (C) 2004 Antoine Jacquet <royale@zerezo.com>
8 * http://royale.zerezo.com/zr364xx/
9 *
10 * Heavily inspired by usb-skeleton.c, vicam.c, cpia.c and spca50x.c drivers
11 * V4L2 version inspired by meye.c driver
12 *
13 * Some video buffer code by Lamarque based on s2255drv.c and vivi.c drivers.
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 */
29
30
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/usb.h>
34 #include <linux/vmalloc.h>
35 #include <linux/slab.h>
36 #include <linux/proc_fs.h>
37 #include <linux/highmem.h>
38 #include <media/v4l2-common.h>
39 #include <media/v4l2-ioctl.h>
40 #include <media/v4l2-device.h>
41 #include <media/v4l2-ctrls.h>
42 #include <media/v4l2-fh.h>
43 #include <media/v4l2-event.h>
44 #include <media/videobuf-vmalloc.h>
45
46
47 /* Version Information */
48 #define DRIVER_VERSION "0.7.4"
49 #define DRIVER_AUTHOR "Antoine Jacquet, http://royale.zerezo.com/"
50 #define DRIVER_DESC "Zoran 364xx"
51
52
53 /* Camera */
54 #define FRAMES 1
55 #define MAX_FRAME_SIZE 200000
56 #define BUFFER_SIZE 0x1000
57 #define CTRL_TIMEOUT 500
58
59 #define ZR364XX_DEF_BUFS 4
60 #define ZR364XX_READ_IDLE 0
61 #define ZR364XX_READ_FRAME 1
62
63 /* Debug macro */
64 #define DBG(fmt, args...) \
65 do { \
66 if (debug) { \
67 printk(KERN_INFO KBUILD_MODNAME " " fmt, ##args); \
68 } \
69 } while (0)
70
71 /*#define FULL_DEBUG 1*/
72 #ifdef FULL_DEBUG
73 #define _DBG DBG
74 #else
75 #define _DBG(fmt, args...)
76 #endif
77
78 /* Init methods, need to find nicer names for these
79 * the exact names of the chipsets would be the best if someone finds it */
80 #define METHOD0 0
81 #define METHOD1 1
82 #define METHOD2 2
83 #define METHOD3 3
84
85
86 /* Module parameters */
87 static int debug;
88 static int mode;
89
90
91 /* Module parameters interface */
92 module_param(debug, int, 0644);
93 MODULE_PARM_DESC(debug, "Debug level");
94 module_param(mode, int, 0644);
95 MODULE_PARM_DESC(mode, "0 = 320x240, 1 = 160x120, 2 = 640x480");
96
97
98 /* Devices supported by this driver
99 * .driver_info contains the init method used by the camera */
100 static struct usb_device_id device_table[] = {
101 {USB_DEVICE(0x08ca, 0x0109), .driver_info = METHOD0 },
102 {USB_DEVICE(0x041e, 0x4024), .driver_info = METHOD0 },
103 {USB_DEVICE(0x0d64, 0x0108), .driver_info = METHOD0 },
104 {USB_DEVICE(0x0546, 0x3187), .driver_info = METHOD0 },
105 {USB_DEVICE(0x0d64, 0x3108), .driver_info = METHOD0 },
106 {USB_DEVICE(0x0595, 0x4343), .driver_info = METHOD0 },
107 {USB_DEVICE(0x0bb0, 0x500d), .driver_info = METHOD0 },
108 {USB_DEVICE(0x0feb, 0x2004), .driver_info = METHOD0 },
109 {USB_DEVICE(0x055f, 0xb500), .driver_info = METHOD0 },
110 {USB_DEVICE(0x08ca, 0x2062), .driver_info = METHOD2 },
111 {USB_DEVICE(0x052b, 0x1a18), .driver_info = METHOD1 },
112 {USB_DEVICE(0x04c8, 0x0729), .driver_info = METHOD0 },
113 {USB_DEVICE(0x04f2, 0xa208), .driver_info = METHOD0 },
114 {USB_DEVICE(0x0784, 0x0040), .driver_info = METHOD1 },
115 {USB_DEVICE(0x06d6, 0x0034), .driver_info = METHOD0 },
116 {USB_DEVICE(0x0a17, 0x0062), .driver_info = METHOD2 },
117 {USB_DEVICE(0x06d6, 0x003b), .driver_info = METHOD0 },
118 {USB_DEVICE(0x0a17, 0x004e), .driver_info = METHOD2 },
119 {USB_DEVICE(0x041e, 0x405d), .driver_info = METHOD2 },
120 {USB_DEVICE(0x08ca, 0x2102), .driver_info = METHOD3 },
121 {USB_DEVICE(0x06d6, 0x003d), .driver_info = METHOD0 },
122 {} /* Terminating entry */
123 };
124
125 MODULE_DEVICE_TABLE(usb, device_table);
126
127 /* frame structure */
128 struct zr364xx_framei {
129 unsigned long ulState; /* ulState:ZR364XX_READ_IDLE,
130 ZR364XX_READ_FRAME */
131 void *lpvbits; /* image data */
132 unsigned long cur_size; /* current data copied to it */
133 };
134
135 /* image buffer structure */
136 struct zr364xx_bufferi {
137 unsigned long dwFrames; /* number of frames in buffer */
138 struct zr364xx_framei frame[FRAMES]; /* array of FRAME structures */
139 };
140
141 struct zr364xx_dmaqueue {
142 struct list_head active;
143 struct zr364xx_camera *cam;
144 };
145
146 struct zr364xx_pipeinfo {
147 u32 transfer_size;
148 u8 *transfer_buffer;
149 u32 state;
150 void *stream_urb;
151 void *cam; /* back pointer to zr364xx_camera struct */
152 u32 err_count;
153 u32 idx;
154 };
155
156 struct zr364xx_fmt {
157 char *name;
158 u32 fourcc;
159 int depth;
160 };
161
162 /* image formats. */
163 static const struct zr364xx_fmt formats[] = {
164 {
165 .name = "JPG",
166 .fourcc = V4L2_PIX_FMT_JPEG,
167 .depth = 24
168 }
169 };
170
171 /* Camera stuff */
172 struct zr364xx_camera {
173 struct usb_device *udev; /* save off the usb device pointer */
174 struct usb_interface *interface;/* the interface for this device */
175 struct v4l2_device v4l2_dev;
176 struct v4l2_ctrl_handler ctrl_handler;
177 struct video_device vdev; /* v4l video device */
178 struct v4l2_fh *owner; /* owns the streaming */
179 int nb;
180 struct zr364xx_bufferi buffer;
181 int skip;
182 int width;
183 int height;
184 int method;
185 struct mutex lock;
186
187 spinlock_t slock;
188 struct zr364xx_dmaqueue vidq;
189 int last_frame;
190 int cur_frame;
191 unsigned long frame_count;
192 int b_acquire;
193 struct zr364xx_pipeinfo pipe[1];
194
195 u8 read_endpoint;
196
197 const struct zr364xx_fmt *fmt;
198 struct videobuf_queue vb_vidq;
199 bool was_streaming;
200 };
201
202 /* buffer for one video frame */
203 struct zr364xx_buffer {
204 /* common v4l buffer stuff -- must be first */
205 struct videobuf_buffer vb;
206 const struct zr364xx_fmt *fmt;
207 };
208
209 /* function used to send initialisation commands to the camera */
210 static int send_control_msg(struct usb_device *udev, u8 request, u16 value,
211 u16 index, unsigned char *cp, u16 size)
212 {
213 int status;
214
215 unsigned char *transfer_buffer = kmalloc(size, GFP_KERNEL);
216 if (!transfer_buffer) {
217 dev_err(&udev->dev, "kmalloc(%d) failed\n", size);
218 return -ENOMEM;
219 }
220
221 memcpy(transfer_buffer, cp, size);
222
223 status = usb_control_msg(udev,
224 usb_sndctrlpipe(udev, 0),
225 request,
226 USB_DIR_OUT | USB_TYPE_VENDOR |
227 USB_RECIP_DEVICE, value, index,
228 transfer_buffer, size, CTRL_TIMEOUT);
229
230 kfree(transfer_buffer);
231 return status;
232 }
233
234
235 /* Control messages sent to the camera to initialize it
236 * and launch the capture */
237 typedef struct {
238 unsigned int value;
239 unsigned int size;
240 unsigned char *bytes;
241 } message;
242
243 /* method 0 */
244 static unsigned char m0d1[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
245 static unsigned char m0d2[] = { 0, 0, 0, 0, 0, 0 };
246 static unsigned char m0d3[] = { 0, 0 };
247 static message m0[] = {
248 {0x1f30, 0, NULL},
249 {0xd000, 0, NULL},
250 {0x3370, sizeof(m0d1), m0d1},
251 {0x2000, 0, NULL},
252 {0x2f0f, 0, NULL},
253 {0x2610, sizeof(m0d2), m0d2},
254 {0xe107, 0, NULL},
255 {0x2502, 0, NULL},
256 {0x1f70, 0, NULL},
257 {0xd000, 0, NULL},
258 {0x9a01, sizeof(m0d3), m0d3},
259 {-1, -1, NULL}
260 };
261
262 /* method 1 */
263 static unsigned char m1d1[] = { 0xff, 0xff };
264 static unsigned char m1d2[] = { 0x00, 0x00 };
265 static message m1[] = {
266 {0x1f30, 0, NULL},
267 {0xd000, 0, NULL},
268 {0xf000, 0, NULL},
269 {0x2000, 0, NULL},
270 {0x2f0f, 0, NULL},
271 {0x2650, 0, NULL},
272 {0xe107, 0, NULL},
273 {0x2502, sizeof(m1d1), m1d1},
274 {0x1f70, 0, NULL},
275 {0xd000, 0, NULL},
276 {0xd000, 0, NULL},
277 {0xd000, 0, NULL},
278 {0x9a01, sizeof(m1d2), m1d2},
279 {-1, -1, NULL}
280 };
281
282 /* method 2 */
283 static unsigned char m2d1[] = { 0xff, 0xff };
284 static message m2[] = {
285 {0x1f30, 0, NULL},
286 {0xf000, 0, NULL},
287 {0x2000, 0, NULL},
288 {0x2f0f, 0, NULL},
289 {0x2650, 0, NULL},
290 {0xe107, 0, NULL},
291 {0x2502, sizeof(m2d1), m2d1},
292 {0x1f70, 0, NULL},
293 {-1, -1, NULL}
294 };
295
296 /* init table */
297 static message *init[4] = { m0, m1, m2, m2 };
298
299
300 /* JPEG static data in header (Huffman table, etc) */
301 static unsigned char header1[] = {
302 0xFF, 0xD8,
303 /*
304 0xFF, 0xE0, 0x00, 0x10, 'J', 'F', 'I', 'F',
305 0x00, 0x01, 0x01, 0x00, 0x33, 0x8A, 0x00, 0x00, 0x33, 0x88,
306 */
307 0xFF, 0xDB, 0x00, 0x84
308 };
309 static unsigned char header2[] = {
310 0xFF, 0xC4, 0x00, 0x1F, 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01,
311 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
312 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
313 0xFF, 0xC4, 0x00, 0xB5, 0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02,
314 0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7D, 0x01,
315 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06,
316 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1,
317 0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, 0x24, 0x33,
318 0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25,
319 0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
320 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54,
321 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67,
322 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A,
323 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94,
324 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6,
325 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8,
326 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA,
327 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2,
328 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3,
329 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFF, 0xC4, 0x00, 0x1F,
330 0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
331 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04,
332 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0xFF, 0xC4, 0x00, 0xB5,
333 0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05,
334 0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11,
335 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
336 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1,
337 0x09, 0x23, 0x33, 0x52, 0xF0, 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16,
338 0x24, 0x34, 0xE1, 0x25, 0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, 0x27,
339 0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44,
340 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57,
341 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
342 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x82, 0x83, 0x84,
343 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96,
344 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8,
345 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA,
346 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3,
347 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5,
348 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
349 0xF8, 0xF9, 0xFA, 0xFF, 0xC0, 0x00, 0x11, 0x08, 0x00, 0xF0, 0x01,
350 0x40, 0x03, 0x01, 0x21, 0x00, 0x02, 0x11, 0x01, 0x03, 0x11, 0x01,
351 0xFF, 0xDA, 0x00, 0x0C, 0x03, 0x01, 0x00, 0x02, 0x11, 0x03, 0x11,
352 0x00, 0x3F, 0x00
353 };
354 static unsigned char header3;
355
356 /* ------------------------------------------------------------------
357 Videobuf operations
358 ------------------------------------------------------------------*/
359
360 static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
361 unsigned int *size)
362 {
363 struct zr364xx_camera *cam = vq->priv_data;
364
365 *size = cam->width * cam->height * (cam->fmt->depth >> 3);
366
367 if (*count == 0)
368 *count = ZR364XX_DEF_BUFS;
369
370 if (*size * *count > ZR364XX_DEF_BUFS * 1024 * 1024)
371 *count = (ZR364XX_DEF_BUFS * 1024 * 1024) / *size;
372
373 return 0;
374 }
375
376 static void free_buffer(struct videobuf_queue *vq, struct zr364xx_buffer *buf)
377 {
378 _DBG("%s\n", __func__);
379
380 BUG_ON(in_interrupt());
381
382 videobuf_vmalloc_free(&buf->vb);
383 buf->vb.state = VIDEOBUF_NEEDS_INIT;
384 }
385
386 static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
387 enum v4l2_field field)
388 {
389 struct zr364xx_camera *cam = vq->priv_data;
390 struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
391 vb);
392 int rc;
393
394 DBG("%s, field=%d, fmt name = %s\n", __func__, field, cam->fmt != NULL ?
395 cam->fmt->name : "");
396 if (cam->fmt == NULL)
397 return -EINVAL;
398
399 buf->vb.size = cam->width * cam->height * (cam->fmt->depth >> 3);
400
401 if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size) {
402 DBG("invalid buffer prepare\n");
403 return -EINVAL;
404 }
405
406 buf->fmt = cam->fmt;
407 buf->vb.width = cam->width;
408 buf->vb.height = cam->height;
409 buf->vb.field = field;
410
411 if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
412 rc = videobuf_iolock(vq, &buf->vb, NULL);
413 if (rc < 0)
414 goto fail;
415 }
416
417 buf->vb.state = VIDEOBUF_PREPARED;
418 return 0;
419 fail:
420 free_buffer(vq, buf);
421 return rc;
422 }
423
424 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
425 {
426 struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
427 vb);
428 struct zr364xx_camera *cam = vq->priv_data;
429
430 _DBG("%s\n", __func__);
431
432 buf->vb.state = VIDEOBUF_QUEUED;
433 list_add_tail(&buf->vb.queue, &cam->vidq.active);
434 }
435
436 static void buffer_release(struct videobuf_queue *vq,
437 struct videobuf_buffer *vb)
438 {
439 struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
440 vb);
441
442 _DBG("%s\n", __func__);
443 free_buffer(vq, buf);
444 }
445
446 static struct videobuf_queue_ops zr364xx_video_qops = {
447 .buf_setup = buffer_setup,
448 .buf_prepare = buffer_prepare,
449 .buf_queue = buffer_queue,
450 .buf_release = buffer_release,
451 };
452
453 /********************/
454 /* V4L2 integration */
455 /********************/
456 static int zr364xx_vidioc_streamon(struct file *file, void *priv,
457 enum v4l2_buf_type type);
458
459 static ssize_t zr364xx_read(struct file *file, char __user *buf, size_t count,
460 loff_t * ppos)
461 {
462 struct zr364xx_camera *cam = video_drvdata(file);
463 int err = 0;
464
465 _DBG("%s\n", __func__);
466
467 if (!buf)
468 return -EINVAL;
469
470 if (!count)
471 return -EINVAL;
472
473 if (mutex_lock_interruptible(&cam->lock))
474 return -ERESTARTSYS;
475
476 err = zr364xx_vidioc_streamon(file, file->private_data,
477 V4L2_BUF_TYPE_VIDEO_CAPTURE);
478 if (err == 0) {
479 DBG("%s: reading %d bytes at pos %d.\n", __func__,
480 (int) count, (int) *ppos);
481
482 /* NoMan Sux ! */
483 err = videobuf_read_one(&cam->vb_vidq, buf, count, ppos,
484 file->f_flags & O_NONBLOCK);
485 }
486 mutex_unlock(&cam->lock);
487 return err;
488 }
489
490 /* video buffer vmalloc implementation based partly on VIVI driver which is
491 * Copyright (c) 2006 by
492 * Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
493 * Ted Walther <ted--a.t--enumera.com>
494 * John Sokol <sokol--a.t--videotechnology.com>
495 * http://v4l.videotechnology.com/
496 *
497 */
498 static void zr364xx_fillbuff(struct zr364xx_camera *cam,
499 struct zr364xx_buffer *buf,
500 int jpgsize)
501 {
502 int pos = 0;
503 const char *tmpbuf;
504 char *vbuf = videobuf_to_vmalloc(&buf->vb);
505 unsigned long last_frame;
506
507 if (!vbuf)
508 return;
509
510 last_frame = cam->last_frame;
511 if (last_frame != -1) {
512 tmpbuf = (const char *)cam->buffer.frame[last_frame].lpvbits;
513 switch (buf->fmt->fourcc) {
514 case V4L2_PIX_FMT_JPEG:
515 buf->vb.size = jpgsize;
516 memcpy(vbuf, tmpbuf, buf->vb.size);
517 break;
518 default:
519 printk(KERN_DEBUG KBUILD_MODNAME ": unknown format?\n");
520 }
521 cam->last_frame = -1;
522 } else {
523 printk(KERN_ERR KBUILD_MODNAME ": =======no frame\n");
524 return;
525 }
526 DBG("%s: Buffer 0x%08lx size= %d\n", __func__,
527 (unsigned long)vbuf, pos);
528 /* tell v4l buffer was filled */
529
530 buf->vb.field_count = cam->frame_count * 2;
531 v4l2_get_timestamp(&buf->vb.ts);
532 buf->vb.state = VIDEOBUF_DONE;
533 }
534
535 static int zr364xx_got_frame(struct zr364xx_camera *cam, int jpgsize)
536 {
537 struct zr364xx_dmaqueue *dma_q = &cam->vidq;
538 struct zr364xx_buffer *buf;
539 unsigned long flags = 0;
540 int rc = 0;
541
542 DBG("wakeup: %p\n", &dma_q);
543 spin_lock_irqsave(&cam->slock, flags);
544
545 if (list_empty(&dma_q->active)) {
546 DBG("No active queue to serve\n");
547 rc = -1;
548 goto unlock;
549 }
550 buf = list_entry(dma_q->active.next,
551 struct zr364xx_buffer, vb.queue);
552
553 if (!waitqueue_active(&buf->vb.done)) {
554 /* no one active */
555 rc = -1;
556 goto unlock;
557 }
558 list_del(&buf->vb.queue);
559 v4l2_get_timestamp(&buf->vb.ts);
560 DBG("[%p/%d] wakeup\n", buf, buf->vb.i);
561 zr364xx_fillbuff(cam, buf, jpgsize);
562 wake_up(&buf->vb.done);
563 DBG("wakeup [buf/i] [%p/%d]\n", buf, buf->vb.i);
564 unlock:
565 spin_unlock_irqrestore(&cam->slock, flags);
566 return rc;
567 }
568
569 /* this function moves the usb stream read pipe data
570 * into the system buffers.
571 * returns 0 on success, EAGAIN if more data to process (call this
572 * function again).
573 */
574 static int zr364xx_read_video_callback(struct zr364xx_camera *cam,
575 struct zr364xx_pipeinfo *pipe_info,
576 struct urb *purb)
577 {
578 unsigned char *pdest;
579 unsigned char *psrc;
580 s32 idx = -1;
581 struct zr364xx_framei *frm;
582 int i = 0;
583 unsigned char *ptr = NULL;
584
585 _DBG("buffer to user\n");
586 idx = cam->cur_frame;
587 frm = &cam->buffer.frame[idx];
588
589 /* swap bytes if camera needs it */
590 if (cam->method == METHOD0) {
591 u16 *buf = (u16 *)pipe_info->transfer_buffer;
592 for (i = 0; i < purb->actual_length/2; i++)
593 swab16s(buf + i);
594 }
595
596 /* search done. now find out if should be acquiring */
597 if (!cam->b_acquire) {
598 /* we found a frame, but this channel is turned off */
599 frm->ulState = ZR364XX_READ_IDLE;
600 return -EINVAL;
601 }
602
603 psrc = (u8 *)pipe_info->transfer_buffer;
604 ptr = pdest = frm->lpvbits;
605
606 if (frm->ulState == ZR364XX_READ_IDLE) {
607 frm->ulState = ZR364XX_READ_FRAME;
608 frm->cur_size = 0;
609
610 _DBG("jpeg header, ");
611 memcpy(ptr, header1, sizeof(header1));
612 ptr += sizeof(header1);
613 header3 = 0;
614 memcpy(ptr, &header3, 1);
615 ptr++;
616 memcpy(ptr, psrc, 64);
617 ptr += 64;
618 header3 = 1;
619 memcpy(ptr, &header3, 1);
620 ptr++;
621 memcpy(ptr, psrc + 64, 64);
622 ptr += 64;
623 memcpy(ptr, header2, sizeof(header2));
624 ptr += sizeof(header2);
625 memcpy(ptr, psrc + 128,
626 purb->actual_length - 128);
627 ptr += purb->actual_length - 128;
628 _DBG("header : %d %d %d %d %d %d %d %d %d\n",
629 psrc[0], psrc[1], psrc[2],
630 psrc[3], psrc[4], psrc[5],
631 psrc[6], psrc[7], psrc[8]);
632 frm->cur_size = ptr - pdest;
633 } else {
634 if (frm->cur_size + purb->actual_length > MAX_FRAME_SIZE) {
635 dev_info(&cam->udev->dev,
636 "%s: buffer (%d bytes) too small to hold "
637 "frame data. Discarding frame data.\n",
638 __func__, MAX_FRAME_SIZE);
639 } else {
640 pdest += frm->cur_size;
641 memcpy(pdest, psrc, purb->actual_length);
642 frm->cur_size += purb->actual_length;
643 }
644 }
645 /*_DBG("cur_size %lu urb size %d\n", frm->cur_size,
646 purb->actual_length);*/
647
648 if (purb->actual_length < pipe_info->transfer_size) {
649 _DBG("****************Buffer[%d]full*************\n", idx);
650 cam->last_frame = cam->cur_frame;
651 cam->cur_frame++;
652 /* end of system frame ring buffer, start at zero */
653 if (cam->cur_frame == cam->buffer.dwFrames)
654 cam->cur_frame = 0;
655
656 /* frame ready */
657 /* go back to find the JPEG EOI marker */
658 ptr = pdest = frm->lpvbits;
659 ptr += frm->cur_size - 2;
660 while (ptr > pdest) {
661 if (*ptr == 0xFF && *(ptr + 1) == 0xD9
662 && *(ptr + 2) == 0xFF)
663 break;
664 ptr--;
665 }
666 if (ptr == pdest)
667 DBG("No EOI marker\n");
668
669 /* Sometimes there is junk data in the middle of the picture,
670 * we want to skip this bogus frames */
671 while (ptr > pdest) {
672 if (*ptr == 0xFF && *(ptr + 1) == 0xFF
673 && *(ptr + 2) == 0xFF)
674 break;
675 ptr--;
676 }
677 if (ptr != pdest) {
678 DBG("Bogus frame ? %d\n", ++(cam->nb));
679 } else if (cam->b_acquire) {
680 /* we skip the 2 first frames which are usually buggy */
681 if (cam->skip)
682 cam->skip--;
683 else {
684 _DBG("jpeg(%lu): %d %d %d %d %d %d %d %d\n",
685 frm->cur_size,
686 pdest[0], pdest[1], pdest[2], pdest[3],
687 pdest[4], pdest[5], pdest[6], pdest[7]);
688
689 zr364xx_got_frame(cam, frm->cur_size);
690 }
691 }
692 cam->frame_count++;
693 frm->ulState = ZR364XX_READ_IDLE;
694 frm->cur_size = 0;
695 }
696 /* done successfully */
697 return 0;
698 }
699
700 static int zr364xx_vidioc_querycap(struct file *file, void *priv,
701 struct v4l2_capability *cap)
702 {
703 struct zr364xx_camera *cam = video_drvdata(file);
704
705 strlcpy(cap->driver, DRIVER_DESC, sizeof(cap->driver));
706 strlcpy(cap->card, cam->udev->product, sizeof(cap->card));
707 strlcpy(cap->bus_info, dev_name(&cam->udev->dev),
708 sizeof(cap->bus_info));
709 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
710 V4L2_CAP_READWRITE |
711 V4L2_CAP_STREAMING;
712 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
713
714 return 0;
715 }
716
717 static int zr364xx_vidioc_enum_input(struct file *file, void *priv,
718 struct v4l2_input *i)
719 {
720 if (i->index != 0)
721 return -EINVAL;
722 strcpy(i->name, DRIVER_DESC " Camera");
723 i->type = V4L2_INPUT_TYPE_CAMERA;
724 return 0;
725 }
726
727 static int zr364xx_vidioc_g_input(struct file *file, void *priv,
728 unsigned int *i)
729 {
730 *i = 0;
731 return 0;
732 }
733
734 static int zr364xx_vidioc_s_input(struct file *file, void *priv,
735 unsigned int i)
736 {
737 if (i != 0)
738 return -EINVAL;
739 return 0;
740 }
741
742 static int zr364xx_s_ctrl(struct v4l2_ctrl *ctrl)
743 {
744 struct zr364xx_camera *cam =
745 container_of(ctrl->handler, struct zr364xx_camera, ctrl_handler);
746 int temp;
747
748 switch (ctrl->id) {
749 case V4L2_CID_BRIGHTNESS:
750 /* hardware brightness */
751 send_control_msg(cam->udev, 1, 0x2001, 0, NULL, 0);
752 temp = (0x60 << 8) + 127 - ctrl->val;
753 send_control_msg(cam->udev, 1, temp, 0, NULL, 0);
754 break;
755 default:
756 return -EINVAL;
757 }
758
759 return 0;
760 }
761
762 static int zr364xx_vidioc_enum_fmt_vid_cap(struct file *file,
763 void *priv, struct v4l2_fmtdesc *f)
764 {
765 if (f->index > 0)
766 return -EINVAL;
767 f->flags = V4L2_FMT_FLAG_COMPRESSED;
768 strcpy(f->description, formats[0].name);
769 f->pixelformat = formats[0].fourcc;
770 return 0;
771 }
772
773 static char *decode_fourcc(__u32 pixelformat, char *buf)
774 {
775 buf[0] = pixelformat & 0xff;
776 buf[1] = (pixelformat >> 8) & 0xff;
777 buf[2] = (pixelformat >> 16) & 0xff;
778 buf[3] = (pixelformat >> 24) & 0xff;
779 buf[4] = '\0';
780 return buf;
781 }
782
783 static int zr364xx_vidioc_try_fmt_vid_cap(struct file *file, void *priv,
784 struct v4l2_format *f)
785 {
786 struct zr364xx_camera *cam = video_drvdata(file);
787 char pixelformat_name[5];
788
789 if (cam == NULL)
790 return -ENODEV;
791
792 if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG) {
793 DBG("%s: unsupported pixelformat V4L2_PIX_FMT_%s\n", __func__,
794 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name));
795 return -EINVAL;
796 }
797
798 if (!(f->fmt.pix.width == 160 && f->fmt.pix.height == 120) &&
799 !(f->fmt.pix.width == 640 && f->fmt.pix.height == 480)) {
800 f->fmt.pix.width = 320;
801 f->fmt.pix.height = 240;
802 }
803
804 f->fmt.pix.field = V4L2_FIELD_NONE;
805 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
806 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
807 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
808 DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
809 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
810 f->fmt.pix.field);
811 return 0;
812 }
813
814 static int zr364xx_vidioc_g_fmt_vid_cap(struct file *file, void *priv,
815 struct v4l2_format *f)
816 {
817 struct zr364xx_camera *cam;
818
819 if (file == NULL)
820 return -ENODEV;
821 cam = video_drvdata(file);
822
823 f->fmt.pix.pixelformat = formats[0].fourcc;
824 f->fmt.pix.field = V4L2_FIELD_NONE;
825 f->fmt.pix.width = cam->width;
826 f->fmt.pix.height = cam->height;
827 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
828 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
829 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
830 return 0;
831 }
832
833 static int zr364xx_vidioc_s_fmt_vid_cap(struct file *file, void *priv,
834 struct v4l2_format *f)
835 {
836 struct zr364xx_camera *cam = video_drvdata(file);
837 struct videobuf_queue *q = &cam->vb_vidq;
838 char pixelformat_name[5];
839 int ret = zr364xx_vidioc_try_fmt_vid_cap(file, cam, f);
840 int i;
841
842 if (ret < 0)
843 return ret;
844
845 mutex_lock(&q->vb_lock);
846
847 if (videobuf_queue_is_busy(&cam->vb_vidq)) {
848 DBG("%s queue busy\n", __func__);
849 ret = -EBUSY;
850 goto out;
851 }
852
853 if (cam->owner) {
854 DBG("%s can't change format after started\n", __func__);
855 ret = -EBUSY;
856 goto out;
857 }
858
859 cam->width = f->fmt.pix.width;
860 cam->height = f->fmt.pix.height;
861 DBG("%s: %dx%d mode selected\n", __func__,
862 cam->width, cam->height);
863 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
864 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
865 f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
866 cam->vb_vidq.field = f->fmt.pix.field;
867
868 if (f->fmt.pix.width == 160 && f->fmt.pix.height == 120)
869 mode = 1;
870 else if (f->fmt.pix.width == 640 && f->fmt.pix.height == 480)
871 mode = 2;
872 else
873 mode = 0;
874
875 m0d1[0] = mode;
876 m1[2].value = 0xf000 + mode;
877 m2[1].value = 0xf000 + mode;
878
879 /* special case for METHOD3, the modes are different */
880 if (cam->method == METHOD3) {
881 switch (mode) {
882 case 1:
883 m2[1].value = 0xf000 + 4;
884 break;
885 case 2:
886 m2[1].value = 0xf000 + 0;
887 break;
888 default:
889 m2[1].value = 0xf000 + 1;
890 break;
891 }
892 }
893
894 header2[437] = cam->height / 256;
895 header2[438] = cam->height % 256;
896 header2[439] = cam->width / 256;
897 header2[440] = cam->width % 256;
898
899 for (i = 0; init[cam->method][i].size != -1; i++) {
900 ret =
901 send_control_msg(cam->udev, 1, init[cam->method][i].value,
902 0, init[cam->method][i].bytes,
903 init[cam->method][i].size);
904 if (ret < 0) {
905 dev_err(&cam->udev->dev,
906 "error during resolution change sequence: %d\n", i);
907 goto out;
908 }
909 }
910
911 /* Added some delay here, since opening/closing the camera quickly,
912 * like Ekiga does during its startup, can crash the webcam
913 */
914 mdelay(100);
915 cam->skip = 2;
916 ret = 0;
917
918 out:
919 mutex_unlock(&q->vb_lock);
920
921 DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
922 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
923 f->fmt.pix.field);
924 return ret;
925 }
926
927 static int zr364xx_vidioc_reqbufs(struct file *file, void *priv,
928 struct v4l2_requestbuffers *p)
929 {
930 struct zr364xx_camera *cam = video_drvdata(file);
931
932 if (cam->owner && cam->owner != priv)
933 return -EBUSY;
934 return videobuf_reqbufs(&cam->vb_vidq, p);
935 }
936
937 static int zr364xx_vidioc_querybuf(struct file *file,
938 void *priv,
939 struct v4l2_buffer *p)
940 {
941 int rc;
942 struct zr364xx_camera *cam = video_drvdata(file);
943 rc = videobuf_querybuf(&cam->vb_vidq, p);
944 return rc;
945 }
946
947 static int zr364xx_vidioc_qbuf(struct file *file,
948 void *priv,
949 struct v4l2_buffer *p)
950 {
951 int rc;
952 struct zr364xx_camera *cam = video_drvdata(file);
953 _DBG("%s\n", __func__);
954 if (cam->owner && cam->owner != priv)
955 return -EBUSY;
956 rc = videobuf_qbuf(&cam->vb_vidq, p);
957 return rc;
958 }
959
960 static int zr364xx_vidioc_dqbuf(struct file *file,
961 void *priv,
962 struct v4l2_buffer *p)
963 {
964 int rc;
965 struct zr364xx_camera *cam = video_drvdata(file);
966 _DBG("%s\n", __func__);
967 if (cam->owner && cam->owner != priv)
968 return -EBUSY;
969 rc = videobuf_dqbuf(&cam->vb_vidq, p, file->f_flags & O_NONBLOCK);
970 return rc;
971 }
972
973 static void read_pipe_completion(struct urb *purb)
974 {
975 struct zr364xx_pipeinfo *pipe_info;
976 struct zr364xx_camera *cam;
977 int pipe;
978
979 pipe_info = purb->context;
980 _DBG("%s %p, status %d\n", __func__, purb, purb->status);
981 if (pipe_info == NULL) {
982 printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
983 return;
984 }
985
986 cam = pipe_info->cam;
987 if (cam == NULL) {
988 printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
989 return;
990 }
991
992 /* if shutting down, do not resubmit, exit immediately */
993 if (purb->status == -ESHUTDOWN) {
994 DBG("%s, err shutdown\n", __func__);
995 pipe_info->err_count++;
996 return;
997 }
998
999 if (pipe_info->state == 0) {
1000 DBG("exiting USB pipe\n");
1001 return;
1002 }
1003
1004 if (purb->actual_length > pipe_info->transfer_size) {
1005 dev_err(&cam->udev->dev, "wrong number of bytes\n");
1006 return;
1007 }
1008
1009 if (purb->status == 0)
1010 zr364xx_read_video_callback(cam, pipe_info, purb);
1011 else {
1012 pipe_info->err_count++;
1013 DBG("%s: failed URB %d\n", __func__, purb->status);
1014 }
1015
1016 pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
1017
1018 /* reuse urb */
1019 usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
1020 pipe,
1021 pipe_info->transfer_buffer,
1022 pipe_info->transfer_size,
1023 read_pipe_completion, pipe_info);
1024
1025 if (pipe_info->state != 0) {
1026 purb->status = usb_submit_urb(pipe_info->stream_urb,
1027 GFP_ATOMIC);
1028
1029 if (purb->status)
1030 dev_err(&cam->udev->dev,
1031 "error submitting urb (error=%i)\n",
1032 purb->status);
1033 } else
1034 DBG("read pipe complete state 0\n");
1035 }
1036
1037 static int zr364xx_start_readpipe(struct zr364xx_camera *cam)
1038 {
1039 int pipe;
1040 int retval;
1041 struct zr364xx_pipeinfo *pipe_info = cam->pipe;
1042 pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
1043 DBG("%s: start pipe IN x%x\n", __func__, cam->read_endpoint);
1044
1045 pipe_info->state = 1;
1046 pipe_info->err_count = 0;
1047 pipe_info->stream_urb = usb_alloc_urb(0, GFP_KERNEL);
1048 if (!pipe_info->stream_urb)
1049 return -ENOMEM;
1050 /* transfer buffer allocated in board_init */
1051 usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
1052 pipe,
1053 pipe_info->transfer_buffer,
1054 pipe_info->transfer_size,
1055 read_pipe_completion, pipe_info);
1056
1057 DBG("submitting URB %p\n", pipe_info->stream_urb);
1058 retval = usb_submit_urb(pipe_info->stream_urb, GFP_KERNEL);
1059 if (retval) {
1060 printk(KERN_ERR KBUILD_MODNAME ": start read pipe failed\n");
1061 return retval;
1062 }
1063
1064 return 0;
1065 }
1066
1067 static void zr364xx_stop_readpipe(struct zr364xx_camera *cam)
1068 {
1069 struct zr364xx_pipeinfo *pipe_info;
1070
1071 if (cam == NULL) {
1072 printk(KERN_ERR KBUILD_MODNAME ": invalid device\n");
1073 return;
1074 }
1075 DBG("stop read pipe\n");
1076 pipe_info = cam->pipe;
1077 if (pipe_info) {
1078 if (pipe_info->state != 0)
1079 pipe_info->state = 0;
1080
1081 if (pipe_info->stream_urb) {
1082 /* cancel urb */
1083 usb_kill_urb(pipe_info->stream_urb);
1084 usb_free_urb(pipe_info->stream_urb);
1085 pipe_info->stream_urb = NULL;
1086 }
1087 }
1088 return;
1089 }
1090
1091 /* starts acquisition process */
1092 static int zr364xx_start_acquire(struct zr364xx_camera *cam)
1093 {
1094 int j;
1095
1096 DBG("start acquire\n");
1097
1098 cam->last_frame = -1;
1099 cam->cur_frame = 0;
1100 for (j = 0; j < FRAMES; j++) {
1101 cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
1102 cam->buffer.frame[j].cur_size = 0;
1103 }
1104 cam->b_acquire = 1;
1105 return 0;
1106 }
1107
1108 static inline int zr364xx_stop_acquire(struct zr364xx_camera *cam)
1109 {
1110 cam->b_acquire = 0;
1111 return 0;
1112 }
1113
1114 static int zr364xx_prepare(struct zr364xx_camera *cam)
1115 {
1116 int res;
1117 int i, j;
1118
1119 for (i = 0; init[cam->method][i].size != -1; i++) {
1120 res = send_control_msg(cam->udev, 1, init[cam->method][i].value,
1121 0, init[cam->method][i].bytes,
1122 init[cam->method][i].size);
1123 if (res < 0) {
1124 dev_err(&cam->udev->dev,
1125 "error during open sequence: %d\n", i);
1126 return res;
1127 }
1128 }
1129
1130 cam->skip = 2;
1131 cam->last_frame = -1;
1132 cam->cur_frame = 0;
1133 cam->frame_count = 0;
1134 for (j = 0; j < FRAMES; j++) {
1135 cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
1136 cam->buffer.frame[j].cur_size = 0;
1137 }
1138 v4l2_ctrl_handler_setup(&cam->ctrl_handler);
1139 return 0;
1140 }
1141
1142 static int zr364xx_vidioc_streamon(struct file *file, void *priv,
1143 enum v4l2_buf_type type)
1144 {
1145 struct zr364xx_camera *cam = video_drvdata(file);
1146 int res;
1147
1148 DBG("%s\n", __func__);
1149
1150 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1151 return -EINVAL;
1152
1153 if (cam->owner && cam->owner != priv)
1154 return -EBUSY;
1155
1156 res = zr364xx_prepare(cam);
1157 if (res)
1158 return res;
1159 res = videobuf_streamon(&cam->vb_vidq);
1160 if (res == 0) {
1161 zr364xx_start_acquire(cam);
1162 cam->owner = file->private_data;
1163 }
1164 return res;
1165 }
1166
1167 static int zr364xx_vidioc_streamoff(struct file *file, void *priv,
1168 enum v4l2_buf_type type)
1169 {
1170 struct zr364xx_camera *cam = video_drvdata(file);
1171
1172 DBG("%s\n", __func__);
1173 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1174 return -EINVAL;
1175 if (cam->owner && cam->owner != priv)
1176 return -EBUSY;
1177 zr364xx_stop_acquire(cam);
1178 return videobuf_streamoff(&cam->vb_vidq);
1179 }
1180
1181
1182 /* open the camera */
1183 static int zr364xx_open(struct file *file)
1184 {
1185 struct zr364xx_camera *cam = video_drvdata(file);
1186 int err;
1187
1188 DBG("%s\n", __func__);
1189
1190 if (mutex_lock_interruptible(&cam->lock))
1191 return -ERESTARTSYS;
1192
1193 err = v4l2_fh_open(file);
1194 if (err)
1195 goto out;
1196
1197 /* Added some delay here, since opening/closing the camera quickly,
1198 * like Ekiga does during its startup, can crash the webcam
1199 */
1200 mdelay(100);
1201 err = 0;
1202
1203 out:
1204 mutex_unlock(&cam->lock);
1205 DBG("%s: %d\n", __func__, err);
1206 return err;
1207 }
1208
1209 static void zr364xx_release(struct v4l2_device *v4l2_dev)
1210 {
1211 struct zr364xx_camera *cam =
1212 container_of(v4l2_dev, struct zr364xx_camera, v4l2_dev);
1213 unsigned long i;
1214
1215 v4l2_device_unregister(&cam->v4l2_dev);
1216
1217 videobuf_mmap_free(&cam->vb_vidq);
1218
1219 /* release sys buffers */
1220 for (i = 0; i < FRAMES; i++) {
1221 if (cam->buffer.frame[i].lpvbits) {
1222 DBG("vfree %p\n", cam->buffer.frame[i].lpvbits);
1223 vfree(cam->buffer.frame[i].lpvbits);
1224 }
1225 cam->buffer.frame[i].lpvbits = NULL;
1226 }
1227
1228 v4l2_ctrl_handler_free(&cam->ctrl_handler);
1229 /* release transfer buffer */
1230 kfree(cam->pipe->transfer_buffer);
1231 kfree(cam);
1232 }
1233
1234 /* release the camera */
1235 static int zr364xx_close(struct file *file)
1236 {
1237 struct zr364xx_camera *cam;
1238 struct usb_device *udev;
1239 int i;
1240
1241 DBG("%s\n", __func__);
1242 cam = video_drvdata(file);
1243
1244 mutex_lock(&cam->lock);
1245 udev = cam->udev;
1246
1247 if (file->private_data == cam->owner) {
1248 /* turn off stream */
1249 if (cam->b_acquire)
1250 zr364xx_stop_acquire(cam);
1251 videobuf_streamoff(&cam->vb_vidq);
1252
1253 for (i = 0; i < 2; i++) {
1254 send_control_msg(udev, 1, init[cam->method][i].value,
1255 0, init[cam->method][i].bytes,
1256 init[cam->method][i].size);
1257 }
1258 cam->owner = NULL;
1259 }
1260
1261 /* Added some delay here, since opening/closing the camera quickly,
1262 * like Ekiga does during its startup, can crash the webcam
1263 */
1264 mdelay(100);
1265 mutex_unlock(&cam->lock);
1266 return v4l2_fh_release(file);
1267 }
1268
1269
1270 static int zr364xx_mmap(struct file *file, struct vm_area_struct *vma)
1271 {
1272 struct zr364xx_camera *cam = video_drvdata(file);
1273 int ret;
1274
1275 if (cam == NULL) {
1276 DBG("%s: cam == NULL\n", __func__);
1277 return -ENODEV;
1278 }
1279 DBG("mmap called, vma=0x%08lx\n", (unsigned long)vma);
1280
1281 ret = videobuf_mmap_mapper(&cam->vb_vidq, vma);
1282
1283 DBG("vma start=0x%08lx, size=%ld, ret=%d\n",
1284 (unsigned long)vma->vm_start,
1285 (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, ret);
1286 return ret;
1287 }
1288
1289 static unsigned int zr364xx_poll(struct file *file,
1290 struct poll_table_struct *wait)
1291 {
1292 struct zr364xx_camera *cam = video_drvdata(file);
1293 struct videobuf_queue *q = &cam->vb_vidq;
1294 unsigned res = v4l2_ctrl_poll(file, wait);
1295
1296 _DBG("%s\n", __func__);
1297
1298 return res | videobuf_poll_stream(file, q, wait);
1299 }
1300
1301 static const struct v4l2_ctrl_ops zr364xx_ctrl_ops = {
1302 .s_ctrl = zr364xx_s_ctrl,
1303 };
1304
1305 static const struct v4l2_file_operations zr364xx_fops = {
1306 .owner = THIS_MODULE,
1307 .open = zr364xx_open,
1308 .release = zr364xx_close,
1309 .read = zr364xx_read,
1310 .mmap = zr364xx_mmap,
1311 .unlocked_ioctl = video_ioctl2,
1312 .poll = zr364xx_poll,
1313 };
1314
1315 static const struct v4l2_ioctl_ops zr364xx_ioctl_ops = {
1316 .vidioc_querycap = zr364xx_vidioc_querycap,
1317 .vidioc_enum_fmt_vid_cap = zr364xx_vidioc_enum_fmt_vid_cap,
1318 .vidioc_try_fmt_vid_cap = zr364xx_vidioc_try_fmt_vid_cap,
1319 .vidioc_s_fmt_vid_cap = zr364xx_vidioc_s_fmt_vid_cap,
1320 .vidioc_g_fmt_vid_cap = zr364xx_vidioc_g_fmt_vid_cap,
1321 .vidioc_enum_input = zr364xx_vidioc_enum_input,
1322 .vidioc_g_input = zr364xx_vidioc_g_input,
1323 .vidioc_s_input = zr364xx_vidioc_s_input,
1324 .vidioc_streamon = zr364xx_vidioc_streamon,
1325 .vidioc_streamoff = zr364xx_vidioc_streamoff,
1326 .vidioc_reqbufs = zr364xx_vidioc_reqbufs,
1327 .vidioc_querybuf = zr364xx_vidioc_querybuf,
1328 .vidioc_qbuf = zr364xx_vidioc_qbuf,
1329 .vidioc_dqbuf = zr364xx_vidioc_dqbuf,
1330 .vidioc_log_status = v4l2_ctrl_log_status,
1331 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1332 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1333 };
1334
1335 static struct video_device zr364xx_template = {
1336 .name = DRIVER_DESC,
1337 .fops = &zr364xx_fops,
1338 .ioctl_ops = &zr364xx_ioctl_ops,
1339 .release = video_device_release_empty,
1340 };
1341
1342
1343
1344 /*******************/
1345 /* USB integration */
1346 /*******************/
1347 static int zr364xx_board_init(struct zr364xx_camera *cam)
1348 {
1349 struct zr364xx_pipeinfo *pipe = cam->pipe;
1350 unsigned long i;
1351
1352 DBG("board init: %p\n", cam);
1353 memset(pipe, 0, sizeof(*pipe));
1354 pipe->cam = cam;
1355 pipe->transfer_size = BUFFER_SIZE;
1356
1357 pipe->transfer_buffer = kzalloc(pipe->transfer_size,
1358 GFP_KERNEL);
1359 if (pipe->transfer_buffer == NULL) {
1360 DBG("out of memory!\n");
1361 return -ENOMEM;
1362 }
1363
1364 cam->b_acquire = 0;
1365 cam->frame_count = 0;
1366
1367 /*** start create system buffers ***/
1368 for (i = 0; i < FRAMES; i++) {
1369 /* always allocate maximum size for system buffers */
1370 cam->buffer.frame[i].lpvbits = vmalloc(MAX_FRAME_SIZE);
1371
1372 DBG("valloc %p, idx %lu, pdata %p\n",
1373 &cam->buffer.frame[i], i,
1374 cam->buffer.frame[i].lpvbits);
1375 if (cam->buffer.frame[i].lpvbits == NULL) {
1376 printk(KERN_INFO KBUILD_MODNAME ": out of memory. "
1377 "Using less frames\n");
1378 break;
1379 }
1380 }
1381
1382 if (i == 0) {
1383 printk(KERN_INFO KBUILD_MODNAME ": out of memory. Aborting\n");
1384 kfree(cam->pipe->transfer_buffer);
1385 cam->pipe->transfer_buffer = NULL;
1386 return -ENOMEM;
1387 } else
1388 cam->buffer.dwFrames = i;
1389
1390 /* make sure internal states are set */
1391 for (i = 0; i < FRAMES; i++) {
1392 cam->buffer.frame[i].ulState = ZR364XX_READ_IDLE;
1393 cam->buffer.frame[i].cur_size = 0;
1394 }
1395
1396 cam->cur_frame = 0;
1397 cam->last_frame = -1;
1398 /*** end create system buffers ***/
1399
1400 /* start read pipe */
1401 zr364xx_start_readpipe(cam);
1402 DBG(": board initialized\n");
1403 return 0;
1404 }
1405
1406 static int zr364xx_probe(struct usb_interface *intf,
1407 const struct usb_device_id *id)
1408 {
1409 struct usb_device *udev = interface_to_usbdev(intf);
1410 struct zr364xx_camera *cam = NULL;
1411 struct usb_host_interface *iface_desc;
1412 struct usb_endpoint_descriptor *endpoint;
1413 struct v4l2_ctrl_handler *hdl;
1414 int err;
1415 int i;
1416
1417 DBG("probing...\n");
1418
1419 dev_info(&intf->dev, DRIVER_DESC " compatible webcam plugged\n");
1420 dev_info(&intf->dev, "model %04x:%04x detected\n",
1421 le16_to_cpu(udev->descriptor.idVendor),
1422 le16_to_cpu(udev->descriptor.idProduct));
1423
1424 cam = kzalloc(sizeof(struct zr364xx_camera), GFP_KERNEL);
1425 if (cam == NULL) {
1426 dev_err(&udev->dev, "cam: out of memory !\n");
1427 return -ENOMEM;
1428 }
1429
1430 cam->v4l2_dev.release = zr364xx_release;
1431 err = v4l2_device_register(&intf->dev, &cam->v4l2_dev);
1432 if (err < 0) {
1433 dev_err(&udev->dev, "couldn't register v4l2_device\n");
1434 kfree(cam);
1435 return err;
1436 }
1437 hdl = &cam->ctrl_handler;
1438 v4l2_ctrl_handler_init(hdl, 1);
1439 v4l2_ctrl_new_std(hdl, &zr364xx_ctrl_ops,
1440 V4L2_CID_BRIGHTNESS, 0, 127, 1, 64);
1441 if (hdl->error) {
1442 err = hdl->error;
1443 dev_err(&udev->dev, "couldn't register control\n");
1444 goto fail;
1445 }
1446 /* save the init method used by this camera */
1447 cam->method = id->driver_info;
1448 mutex_init(&cam->lock);
1449 cam->vdev = zr364xx_template;
1450 cam->vdev.lock = &cam->lock;
1451 cam->vdev.v4l2_dev = &cam->v4l2_dev;
1452 cam->vdev.ctrl_handler = &cam->ctrl_handler;
1453 video_set_drvdata(&cam->vdev, cam);
1454
1455 cam->udev = udev;
1456
1457 switch (mode) {
1458 case 1:
1459 dev_info(&udev->dev, "160x120 mode selected\n");
1460 cam->width = 160;
1461 cam->height = 120;
1462 break;
1463 case 2:
1464 dev_info(&udev->dev, "640x480 mode selected\n");
1465 cam->width = 640;
1466 cam->height = 480;
1467 break;
1468 default:
1469 dev_info(&udev->dev, "320x240 mode selected\n");
1470 cam->width = 320;
1471 cam->height = 240;
1472 break;
1473 }
1474
1475 m0d1[0] = mode;
1476 m1[2].value = 0xf000 + mode;
1477 m2[1].value = 0xf000 + mode;
1478
1479 /* special case for METHOD3, the modes are different */
1480 if (cam->method == METHOD3) {
1481 switch (mode) {
1482 case 1:
1483 m2[1].value = 0xf000 + 4;
1484 break;
1485 case 2:
1486 m2[1].value = 0xf000 + 0;
1487 break;
1488 default:
1489 m2[1].value = 0xf000 + 1;
1490 break;
1491 }
1492 }
1493
1494 header2[437] = cam->height / 256;
1495 header2[438] = cam->height % 256;
1496 header2[439] = cam->width / 256;
1497 header2[440] = cam->width % 256;
1498
1499 cam->nb = 0;
1500
1501 DBG("dev: %p, udev %p interface %p\n", cam, cam->udev, intf);
1502
1503 /* set up the endpoint information */
1504 iface_desc = intf->cur_altsetting;
1505 DBG("num endpoints %d\n", iface_desc->desc.bNumEndpoints);
1506 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1507 endpoint = &iface_desc->endpoint[i].desc;
1508 if (!cam->read_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
1509 /* we found the bulk in endpoint */
1510 cam->read_endpoint = endpoint->bEndpointAddress;
1511 }
1512 }
1513
1514 if (!cam->read_endpoint) {
1515 err = -ENOMEM;
1516 dev_err(&intf->dev, "Could not find bulk-in endpoint\n");
1517 goto fail;
1518 }
1519
1520 /* v4l */
1521 INIT_LIST_HEAD(&cam->vidq.active);
1522 cam->vidq.cam = cam;
1523
1524 usb_set_intfdata(intf, cam);
1525
1526 /* load zr364xx board specific */
1527 err = zr364xx_board_init(cam);
1528 if (!err)
1529 err = v4l2_ctrl_handler_setup(hdl);
1530 if (err)
1531 goto fail;
1532
1533 spin_lock_init(&cam->slock);
1534
1535 cam->fmt = formats;
1536
1537 videobuf_queue_vmalloc_init(&cam->vb_vidq, &zr364xx_video_qops,
1538 NULL, &cam->slock,
1539 V4L2_BUF_TYPE_VIDEO_CAPTURE,
1540 V4L2_FIELD_NONE,
1541 sizeof(struct zr364xx_buffer), cam, &cam->lock);
1542
1543 err = video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1);
1544 if (err) {
1545 dev_err(&udev->dev, "video_register_device failed\n");
1546 goto fail;
1547 }
1548
1549 dev_info(&udev->dev, DRIVER_DESC " controlling device %s\n",
1550 video_device_node_name(&cam->vdev));
1551 return 0;
1552
1553 fail:
1554 v4l2_ctrl_handler_free(hdl);
1555 v4l2_device_unregister(&cam->v4l2_dev);
1556 kfree(cam);
1557 return err;
1558 }
1559
1560
1561 static void zr364xx_disconnect(struct usb_interface *intf)
1562 {
1563 struct zr364xx_camera *cam = usb_get_intfdata(intf);
1564
1565 mutex_lock(&cam->lock);
1566 usb_set_intfdata(intf, NULL);
1567 dev_info(&intf->dev, DRIVER_DESC " webcam unplugged\n");
1568 video_unregister_device(&cam->vdev);
1569 v4l2_device_disconnect(&cam->v4l2_dev);
1570
1571 /* stops the read pipe if it is running */
1572 if (cam->b_acquire)
1573 zr364xx_stop_acquire(cam);
1574
1575 zr364xx_stop_readpipe(cam);
1576 mutex_unlock(&cam->lock);
1577 v4l2_device_put(&cam->v4l2_dev);
1578 }
1579
1580
1581 #ifdef CONFIG_PM
1582 static int zr364xx_suspend(struct usb_interface *intf, pm_message_t message)
1583 {
1584 struct zr364xx_camera *cam = usb_get_intfdata(intf);
1585
1586 cam->was_streaming = cam->b_acquire;
1587 if (!cam->was_streaming)
1588 return 0;
1589 zr364xx_stop_acquire(cam);
1590 zr364xx_stop_readpipe(cam);
1591 return 0;
1592 }
1593
1594 static int zr364xx_resume(struct usb_interface *intf)
1595 {
1596 struct zr364xx_camera *cam = usb_get_intfdata(intf);
1597 int res;
1598
1599 if (!cam->was_streaming)
1600 return 0;
1601
1602 zr364xx_start_readpipe(cam);
1603 res = zr364xx_prepare(cam);
1604 if (!res)
1605 zr364xx_start_acquire(cam);
1606 return res;
1607 }
1608 #endif
1609
1610 /**********************/
1611 /* Module integration */
1612 /**********************/
1613
1614 static struct usb_driver zr364xx_driver = {
1615 .name = "zr364xx",
1616 .probe = zr364xx_probe,
1617 .disconnect = zr364xx_disconnect,
1618 #ifdef CONFIG_PM
1619 .suspend = zr364xx_suspend,
1620 .resume = zr364xx_resume,
1621 .reset_resume = zr364xx_resume,
1622 #endif
1623 .id_table = device_table
1624 };
1625
1626 module_usb_driver(zr364xx_driver);
1627
1628 MODULE_AUTHOR(DRIVER_AUTHOR);
1629 MODULE_DESCRIPTION(DRIVER_DESC);
1630 MODULE_LICENSE("GPL");
1631 MODULE_VERSION(DRIVER_VERSION);
Linux with added FPC-III support