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Btrfs: stop the readahead threads on failed mount
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / media / video / zr364xx.c
blobc492846c1c5a33770c6488cbfd8095f7c91757db
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/videobuf-vmalloc.h>
41
42
43 /* Version Information */
44 #define DRIVER_VERSION "0.7.4"
45 #define DRIVER_AUTHOR "Antoine Jacquet, http://royale.zerezo.com/"
46 #define DRIVER_DESC "Zoran 364xx"
47
48
49 /* Camera */
50 #define FRAMES 1
51 #define MAX_FRAME_SIZE 200000
52 #define BUFFER_SIZE 0x1000
53 #define CTRL_TIMEOUT 500
54
55 #define ZR364XX_DEF_BUFS 4
56 #define ZR364XX_READ_IDLE 0
57 #define ZR364XX_READ_FRAME 1
58
59 /* Debug macro */
60 #define DBG(fmt, args...) \
61 do { \
62 if (debug) { \
63 printk(KERN_INFO KBUILD_MODNAME " " fmt, ##args); \
64 } \
65 } while (0)
66
67 /*#define FULL_DEBUG 1*/
68 #ifdef FULL_DEBUG
69 #define _DBG DBG
70 #else
71 #define _DBG(fmt, args...)
72 #endif
73
74 /* Init methods, need to find nicer names for these
75 * the exact names of the chipsets would be the best if someone finds it */
76 #define METHOD0 0
77 #define METHOD1 1
78 #define METHOD2 2
79 #define METHOD3 3
80
81
82 /* Module parameters */
83 static int debug;
84 static int mode;
85
86
87 /* Module parameters interface */
88 module_param(debug, int, 0644);
89 MODULE_PARM_DESC(debug, "Debug level");
90 module_param(mode, int, 0644);
91 MODULE_PARM_DESC(mode, "0 = 320x240, 1 = 160x120, 2 = 640x480");
92
93
94 /* Devices supported by this driver
95 * .driver_info contains the init method used by the camera */
96 static struct usb_device_id device_table[] = {
97 {USB_DEVICE(0x08ca, 0x0109), .driver_info = METHOD0 },
98 {USB_DEVICE(0x041e, 0x4024), .driver_info = METHOD0 },
99 {USB_DEVICE(0x0d64, 0x0108), .driver_info = METHOD0 },
100 {USB_DEVICE(0x0546, 0x3187), .driver_info = METHOD0 },
101 {USB_DEVICE(0x0d64, 0x3108), .driver_info = METHOD0 },
102 {USB_DEVICE(0x0595, 0x4343), .driver_info = METHOD0 },
103 {USB_DEVICE(0x0bb0, 0x500d), .driver_info = METHOD0 },
104 {USB_DEVICE(0x0feb, 0x2004), .driver_info = METHOD0 },
105 {USB_DEVICE(0x055f, 0xb500), .driver_info = METHOD0 },
106 {USB_DEVICE(0x08ca, 0x2062), .driver_info = METHOD2 },
107 {USB_DEVICE(0x052b, 0x1a18), .driver_info = METHOD1 },
108 {USB_DEVICE(0x04c8, 0x0729), .driver_info = METHOD0 },
109 {USB_DEVICE(0x04f2, 0xa208), .driver_info = METHOD0 },
110 {USB_DEVICE(0x0784, 0x0040), .driver_info = METHOD1 },
111 {USB_DEVICE(0x06d6, 0x0034), .driver_info = METHOD0 },
112 {USB_DEVICE(0x0a17, 0x0062), .driver_info = METHOD2 },
113 {USB_DEVICE(0x06d6, 0x003b), .driver_info = METHOD0 },
114 {USB_DEVICE(0x0a17, 0x004e), .driver_info = METHOD2 },
115 {USB_DEVICE(0x041e, 0x405d), .driver_info = METHOD2 },
116 {USB_DEVICE(0x08ca, 0x2102), .driver_info = METHOD3 },
117 {USB_DEVICE(0x06d6, 0x003d), .driver_info = METHOD0 },
118 {} /* Terminating entry */
119 };
120
121 MODULE_DEVICE_TABLE(usb, device_table);
122
123 struct zr364xx_mode {
124 u32 color; /* output video color format */
125 u32 brightness; /* brightness */
126 };
127
128 /* frame structure */
129 struct zr364xx_framei {
130 unsigned long ulState; /* ulState:ZR364XX_READ_IDLE,
131 ZR364XX_READ_FRAME */
132 void *lpvbits; /* image data */
133 unsigned long cur_size; /* current data copied to it */
134 };
135
136 /* image buffer structure */
137 struct zr364xx_bufferi {
138 unsigned long dwFrames; /* number of frames in buffer */
139 struct zr364xx_framei frame[FRAMES]; /* array of FRAME structures */
140 };
141
142 struct zr364xx_dmaqueue {
143 struct list_head active;
144 struct zr364xx_camera *cam;
145 };
146
147 struct zr364xx_pipeinfo {
148 u32 transfer_size;
149 u8 *transfer_buffer;
150 u32 state;
151 void *stream_urb;
152 void *cam; /* back pointer to zr364xx_camera struct */
153 u32 err_count;
154 u32 idx;
155 };
156
157 struct zr364xx_fmt {
158 char *name;
159 u32 fourcc;
160 int depth;
161 };
162
163 /* image formats. */
164 static const struct zr364xx_fmt formats[] = {
165 {
166 .name = "JPG",
167 .fourcc = V4L2_PIX_FMT_JPEG,
168 .depth = 24
169 }
170 };
171
172 /* Camera stuff */
173 struct zr364xx_camera {
174 struct usb_device *udev; /* save off the usb device pointer */
175 struct usb_interface *interface;/* the interface for this device */
176 struct video_device *vdev; /* v4l video device */
177 int nb;
178 struct zr364xx_bufferi buffer;
179 int skip;
180 int width;
181 int height;
182 int method;
183 struct mutex lock;
184 struct mutex open_lock;
185 int users;
186
187 spinlock_t slock;
188 struct zr364xx_dmaqueue vidq;
189 int resources;
190 int last_frame;
191 int cur_frame;
192 unsigned long frame_count;
193 int b_acquire;
194 struct zr364xx_pipeinfo pipe[1];
195
196 u8 read_endpoint;
197
198 const struct zr364xx_fmt *fmt;
199 struct videobuf_queue vb_vidq;
200 enum v4l2_buf_type type;
201 struct zr364xx_mode mode;
202 };
203
204 /* buffer for one video frame */
205 struct zr364xx_buffer {
206 /* common v4l buffer stuff -- must be first */
207 struct videobuf_buffer vb;
208 const struct zr364xx_fmt *fmt;
209 };
210
211 /* function used to send initialisation commands to the camera */
212 static int send_control_msg(struct usb_device *udev, u8 request, u16 value,
213 u16 index, unsigned char *cp, u16 size)
214 {
215 int status;
216
217 unsigned char *transfer_buffer = kmalloc(size, GFP_KERNEL);
218 if (!transfer_buffer) {
219 dev_err(&udev->dev, "kmalloc(%d) failed\n", size);
220 return -ENOMEM;
221 }
222
223 memcpy(transfer_buffer, cp, size);
224
225 status = usb_control_msg(udev,
226 usb_sndctrlpipe(udev, 0),
227 request,
228 USB_DIR_OUT | USB_TYPE_VENDOR |
229 USB_RECIP_DEVICE, value, index,
230 transfer_buffer, size, CTRL_TIMEOUT);
231
232 kfree(transfer_buffer);
233
234 if (status < 0)
235 dev_err(&udev->dev,
236 "Failed sending control message, error %d.\n", status);
237
238 return status;
239 }
240
241
242 /* Control messages sent to the camera to initialize it
243 * and launch the capture */
244 typedef struct {
245 unsigned int value;
246 unsigned int size;
247 unsigned char *bytes;
248 } message;
249
250 /* method 0 */
251 static unsigned char m0d1[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
252 static unsigned char m0d2[] = { 0, 0, 0, 0, 0, 0 };
253 static unsigned char m0d3[] = { 0, 0 };
254 static message m0[] = {
255 {0x1f30, 0, NULL},
256 {0xd000, 0, NULL},
257 {0x3370, sizeof(m0d1), m0d1},
258 {0x2000, 0, NULL},
259 {0x2f0f, 0, NULL},
260 {0x2610, sizeof(m0d2), m0d2},
261 {0xe107, 0, NULL},
262 {0x2502, 0, NULL},
263 {0x1f70, 0, NULL},
264 {0xd000, 0, NULL},
265 {0x9a01, sizeof(m0d3), m0d3},
266 {-1, -1, NULL}
267 };
268
269 /* method 1 */
270 static unsigned char m1d1[] = { 0xff, 0xff };
271 static unsigned char m1d2[] = { 0x00, 0x00 };
272 static message m1[] = {
273 {0x1f30, 0, NULL},
274 {0xd000, 0, NULL},
275 {0xf000, 0, NULL},
276 {0x2000, 0, NULL},
277 {0x2f0f, 0, NULL},
278 {0x2650, 0, NULL},
279 {0xe107, 0, NULL},
280 {0x2502, sizeof(m1d1), m1d1},
281 {0x1f70, 0, NULL},
282 {0xd000, 0, NULL},
283 {0xd000, 0, NULL},
284 {0xd000, 0, NULL},
285 {0x9a01, sizeof(m1d2), m1d2},
286 {-1, -1, NULL}
287 };
288
289 /* method 2 */
290 static unsigned char m2d1[] = { 0xff, 0xff };
291 static message m2[] = {
292 {0x1f30, 0, NULL},
293 {0xf000, 0, NULL},
294 {0x2000, 0, NULL},
295 {0x2f0f, 0, NULL},
296 {0x2650, 0, NULL},
297 {0xe107, 0, NULL},
298 {0x2502, sizeof(m2d1), m2d1},
299 {0x1f70, 0, NULL},
300 {-1, -1, NULL}
301 };
302
303 /* init table */
304 static message *init[4] = { m0, m1, m2, m2 };
305
306
307 /* JPEG static data in header (Huffman table, etc) */
308 static unsigned char header1[] = {
309 0xFF, 0xD8,
310 /*
311 0xFF, 0xE0, 0x00, 0x10, 'J', 'F', 'I', 'F',
312 0x00, 0x01, 0x01, 0x00, 0x33, 0x8A, 0x00, 0x00, 0x33, 0x88,
313 */
314 0xFF, 0xDB, 0x00, 0x84
315 };
316 static unsigned char header2[] = {
317 0xFF, 0xC4, 0x00, 0x1F, 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01,
318 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
319 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
320 0xFF, 0xC4, 0x00, 0xB5, 0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02,
321 0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7D, 0x01,
322 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06,
323 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1,
324 0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, 0x24, 0x33,
325 0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25,
326 0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
327 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54,
328 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67,
329 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A,
330 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94,
331 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6,
332 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8,
333 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA,
334 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2,
335 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3,
336 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFF, 0xC4, 0x00, 0x1F,
337 0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
338 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04,
339 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0xFF, 0xC4, 0x00, 0xB5,
340 0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05,
341 0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11,
342 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
343 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1,
344 0x09, 0x23, 0x33, 0x52, 0xF0, 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16,
345 0x24, 0x34, 0xE1, 0x25, 0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, 0x27,
346 0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44,
347 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57,
348 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
349 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x82, 0x83, 0x84,
350 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96,
351 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8,
352 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA,
353 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3,
354 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5,
355 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
356 0xF8, 0xF9, 0xFA, 0xFF, 0xC0, 0x00, 0x11, 0x08, 0x00, 0xF0, 0x01,
357 0x40, 0x03, 0x01, 0x21, 0x00, 0x02, 0x11, 0x01, 0x03, 0x11, 0x01,
358 0xFF, 0xDA, 0x00, 0x0C, 0x03, 0x01, 0x00, 0x02, 0x11, 0x03, 0x11,
359 0x00, 0x3F, 0x00
360 };
361 static unsigned char header3;
362
363 /* ------------------------------------------------------------------
364 Videobuf operations
365 ------------------------------------------------------------------*/
366
367 static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
368 unsigned int *size)
369 {
370 struct zr364xx_camera *cam = vq->priv_data;
371
372 *size = cam->width * cam->height * (cam->fmt->depth >> 3);
373
374 if (*count == 0)
375 *count = ZR364XX_DEF_BUFS;
376
377 if (*size * *count > ZR364XX_DEF_BUFS * 1024 * 1024)
378 *count = (ZR364XX_DEF_BUFS * 1024 * 1024) / *size;
379
380 return 0;
381 }
382
383 static void free_buffer(struct videobuf_queue *vq, struct zr364xx_buffer *buf)
384 {
385 _DBG("%s\n", __func__);
386
387 if (in_interrupt())
388 BUG();
389
390 videobuf_vmalloc_free(&buf->vb);
391 buf->vb.state = VIDEOBUF_NEEDS_INIT;
392 }
393
394 static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
395 enum v4l2_field field)
396 {
397 struct zr364xx_camera *cam = vq->priv_data;
398 struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
399 vb);
400 int rc;
401
402 DBG("%s, field=%d, fmt name = %s\n", __func__, field, cam->fmt != NULL ?
403 cam->fmt->name : "");
404 if (cam->fmt == NULL)
405 return -EINVAL;
406
407 buf->vb.size = cam->width * cam->height * (cam->fmt->depth >> 3);
408
409 if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size) {
410 DBG("invalid buffer prepare\n");
411 return -EINVAL;
412 }
413
414 buf->fmt = cam->fmt;
415 buf->vb.width = cam->width;
416 buf->vb.height = cam->height;
417 buf->vb.field = field;
418
419 if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
420 rc = videobuf_iolock(vq, &buf->vb, NULL);
421 if (rc < 0)
422 goto fail;
423 }
424
425 buf->vb.state = VIDEOBUF_PREPARED;
426 return 0;
427 fail:
428 free_buffer(vq, buf);
429 return rc;
430 }
431
432 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
433 {
434 struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
435 vb);
436 struct zr364xx_camera *cam = vq->priv_data;
437
438 _DBG("%s\n", __func__);
439
440 buf->vb.state = VIDEOBUF_QUEUED;
441 list_add_tail(&buf->vb.queue, &cam->vidq.active);
442 }
443
444 static void buffer_release(struct videobuf_queue *vq,
445 struct videobuf_buffer *vb)
446 {
447 struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
448 vb);
449
450 _DBG("%s\n", __func__);
451 free_buffer(vq, buf);
452 }
453
454 static struct videobuf_queue_ops zr364xx_video_qops = {
455 .buf_setup = buffer_setup,
456 .buf_prepare = buffer_prepare,
457 .buf_queue = buffer_queue,
458 .buf_release = buffer_release,
459 };
460
461 /********************/
462 /* V4L2 integration */
463 /********************/
464 static int zr364xx_vidioc_streamon(struct file *file, void *priv,
465 enum v4l2_buf_type type);
466
467 static ssize_t zr364xx_read(struct file *file, char __user *buf, size_t count,
468 loff_t * ppos)
469 {
470 struct zr364xx_camera *cam = video_drvdata(file);
471
472 _DBG("%s\n", __func__);
473
474 if (!buf)
475 return -EINVAL;
476
477 if (!count)
478 return -EINVAL;
479
480 if (cam->type == V4L2_BUF_TYPE_VIDEO_CAPTURE &&
481 zr364xx_vidioc_streamon(file, cam, cam->type) == 0) {
482 DBG("%s: reading %d bytes at pos %d.\n", __func__, (int) count,
483 (int) *ppos);
484
485 /* NoMan Sux ! */
486 return videobuf_read_one(&cam->vb_vidq, buf, count, ppos,
487 file->f_flags & O_NONBLOCK);
488 }
489
490 return 0;
491 }
492
493 /* video buffer vmalloc implementation based partly on VIVI driver which is
494 * Copyright (c) 2006 by
495 * Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
496 * Ted Walther <ted--a.t--enumera.com>
497 * John Sokol <sokol--a.t--videotechnology.com>
498 * http://v4l.videotechnology.com/
499 *
500 */
501 static void zr364xx_fillbuff(struct zr364xx_camera *cam,
502 struct zr364xx_buffer *buf,
503 int jpgsize)
504 {
505 int pos = 0;
506 struct timeval ts;
507 const char *tmpbuf;
508 char *vbuf = videobuf_to_vmalloc(&buf->vb);
509 unsigned long last_frame;
510 struct zr364xx_framei *frm;
511
512 if (!vbuf)
513 return;
514
515 last_frame = cam->last_frame;
516 if (last_frame != -1) {
517 frm = &cam->buffer.frame[last_frame];
518 tmpbuf = (const char *)cam->buffer.frame[last_frame].lpvbits;
519 switch (buf->fmt->fourcc) {
520 case V4L2_PIX_FMT_JPEG:
521 buf->vb.size = jpgsize;
522 memcpy(vbuf, tmpbuf, buf->vb.size);
523 break;
524 default:
525 printk(KERN_DEBUG KBUILD_MODNAME ": unknown format?\n");
526 }
527 cam->last_frame = -1;
528 } else {
529 printk(KERN_ERR KBUILD_MODNAME ": =======no frame\n");
530 return;
531 }
532 DBG("%s: Buffer 0x%08lx size= %d\n", __func__,
533 (unsigned long)vbuf, pos);
534 /* tell v4l buffer was filled */
535
536 buf->vb.field_count = cam->frame_count * 2;
537 do_gettimeofday(&ts);
538 buf->vb.ts = ts;
539 buf->vb.state = VIDEOBUF_DONE;
540 }
541
542 static int zr364xx_got_frame(struct zr364xx_camera *cam, int jpgsize)
543 {
544 struct zr364xx_dmaqueue *dma_q = &cam->vidq;
545 struct zr364xx_buffer *buf;
546 unsigned long flags = 0;
547 int rc = 0;
548
549 DBG("wakeup: %p\n", &dma_q);
550 spin_lock_irqsave(&cam->slock, flags);
551
552 if (list_empty(&dma_q->active)) {
553 DBG("No active queue to serve\n");
554 rc = -1;
555 goto unlock;
556 }
557 buf = list_entry(dma_q->active.next,
558 struct zr364xx_buffer, vb.queue);
559
560 if (!waitqueue_active(&buf->vb.done)) {
561 /* no one active */
562 rc = -1;
563 goto unlock;
564 }
565 list_del(&buf->vb.queue);
566 do_gettimeofday(&buf->vb.ts);
567 DBG("[%p/%d] wakeup\n", buf, buf->vb.i);
568 zr364xx_fillbuff(cam, buf, jpgsize);
569 wake_up(&buf->vb.done);
570 DBG("wakeup [buf/i] [%p/%d]\n", buf, buf->vb.i);
571 unlock:
572 spin_unlock_irqrestore(&cam->slock, flags);
573 return rc;
574 }
575
576 /* this function moves the usb stream read pipe data
577 * into the system buffers.
578 * returns 0 on success, EAGAIN if more data to process (call this
579 * function again).
580 */
581 static int zr364xx_read_video_callback(struct zr364xx_camera *cam,
582 struct zr364xx_pipeinfo *pipe_info,
583 struct urb *purb)
584 {
585 unsigned char *pdest;
586 unsigned char *psrc;
587 s32 idx = -1;
588 struct zr364xx_framei *frm;
589 int i = 0;
590 unsigned char *ptr = NULL;
591
592 _DBG("buffer to user\n");
593 idx = cam->cur_frame;
594 frm = &cam->buffer.frame[idx];
595
596 /* swap bytes if camera needs it */
597 if (cam->method == METHOD0) {
598 u16 *buf = (u16 *)pipe_info->transfer_buffer;
599 for (i = 0; i < purb->actual_length/2; i++)
600 swab16s(buf + i);
601 }
602
603 /* search done. now find out if should be acquiring */
604 if (!cam->b_acquire) {
605 /* we found a frame, but this channel is turned off */
606 frm->ulState = ZR364XX_READ_IDLE;
607 return -EINVAL;
608 }
609
610 psrc = (u8 *)pipe_info->transfer_buffer;
611 ptr = pdest = frm->lpvbits;
612
613 if (frm->ulState == ZR364XX_READ_IDLE) {
614 frm->ulState = ZR364XX_READ_FRAME;
615 frm->cur_size = 0;
616
617 _DBG("jpeg header, ");
618 memcpy(ptr, header1, sizeof(header1));
619 ptr += sizeof(header1);
620 header3 = 0;
621 memcpy(ptr, &header3, 1);
622 ptr++;
623 memcpy(ptr, psrc, 64);
624 ptr += 64;
625 header3 = 1;
626 memcpy(ptr, &header3, 1);
627 ptr++;
628 memcpy(ptr, psrc + 64, 64);
629 ptr += 64;
630 memcpy(ptr, header2, sizeof(header2));
631 ptr += sizeof(header2);
632 memcpy(ptr, psrc + 128,
633 purb->actual_length - 128);
634 ptr += purb->actual_length - 128;
635 _DBG("header : %d %d %d %d %d %d %d %d %d\n",
636 psrc[0], psrc[1], psrc[2],
637 psrc[3], psrc[4], psrc[5],
638 psrc[6], psrc[7], psrc[8]);
639 frm->cur_size = ptr - pdest;
640 } else {
641 if (frm->cur_size + purb->actual_length > MAX_FRAME_SIZE) {
642 dev_info(&cam->udev->dev,
643 "%s: buffer (%d bytes) too small to hold "
644 "frame data. Discarding frame data.\n",
645 __func__, MAX_FRAME_SIZE);
646 } else {
647 pdest += frm->cur_size;
648 memcpy(pdest, psrc, purb->actual_length);
649 frm->cur_size += purb->actual_length;
650 }
651 }
652 /*_DBG("cur_size %lu urb size %d\n", frm->cur_size,
653 purb->actual_length);*/
654
655 if (purb->actual_length < pipe_info->transfer_size) {
656 _DBG("****************Buffer[%d]full*************\n", idx);
657 cam->last_frame = cam->cur_frame;
658 cam->cur_frame++;
659 /* end of system frame ring buffer, start at zero */
660 if (cam->cur_frame == cam->buffer.dwFrames)
661 cam->cur_frame = 0;
662
663 /* frame ready */
664 /* go back to find the JPEG EOI marker */
665 ptr = pdest = frm->lpvbits;
666 ptr += frm->cur_size - 2;
667 while (ptr > pdest) {
668 if (*ptr == 0xFF && *(ptr + 1) == 0xD9
669 && *(ptr + 2) == 0xFF)
670 break;
671 ptr--;
672 }
673 if (ptr == pdest)
674 DBG("No EOI marker\n");
675
676 /* Sometimes there is junk data in the middle of the picture,
677 * we want to skip this bogus frames */
678 while (ptr > pdest) {
679 if (*ptr == 0xFF && *(ptr + 1) == 0xFF
680 && *(ptr + 2) == 0xFF)
681 break;
682 ptr--;
683 }
684 if (ptr != pdest) {
685 DBG("Bogus frame ? %d\n", ++(cam->nb));
686 } else if (cam->b_acquire) {
687 /* we skip the 2 first frames which are usually buggy */
688 if (cam->skip)
689 cam->skip--;
690 else {
691 _DBG("jpeg(%lu): %d %d %d %d %d %d %d %d\n",
692 frm->cur_size,
693 pdest[0], pdest[1], pdest[2], pdest[3],
694 pdest[4], pdest[5], pdest[6], pdest[7]);
695
696 zr364xx_got_frame(cam, frm->cur_size);
697 }
698 }
699 cam->frame_count++;
700 frm->ulState = ZR364XX_READ_IDLE;
701 frm->cur_size = 0;
702 }
703 /* done successfully */
704 return 0;
705 }
706
707 static int res_get(struct zr364xx_camera *cam)
708 {
709 /* is it free? */
710 mutex_lock(&cam->lock);
711 if (cam->resources) {
712 /* no, someone else uses it */
713 mutex_unlock(&cam->lock);
714 return 0;
715 }
716 /* it's free, grab it */
717 cam->resources = 1;
718 _DBG("res: get\n");
719 mutex_unlock(&cam->lock);
720 return 1;
721 }
722
723 static inline int res_check(struct zr364xx_camera *cam)
724 {
725 return cam->resources;
726 }
727
728 static void res_free(struct zr364xx_camera *cam)
729 {
730 mutex_lock(&cam->lock);
731 cam->resources = 0;
732 mutex_unlock(&cam->lock);
733 _DBG("res: put\n");
734 }
735
736 static int zr364xx_vidioc_querycap(struct file *file, void *priv,
737 struct v4l2_capability *cap)
738 {
739 struct zr364xx_camera *cam = video_drvdata(file);
740
741 strlcpy(cap->driver, DRIVER_DESC, sizeof(cap->driver));
742 strlcpy(cap->card, cam->udev->product, sizeof(cap->card));
743 strlcpy(cap->bus_info, dev_name(&cam->udev->dev),
744 sizeof(cap->bus_info));
745 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
746 V4L2_CAP_READWRITE |
747 V4L2_CAP_STREAMING;
748
749 return 0;
750 }
751
752 static int zr364xx_vidioc_enum_input(struct file *file, void *priv,
753 struct v4l2_input *i)
754 {
755 if (i->index != 0)
756 return -EINVAL;
757 strcpy(i->name, DRIVER_DESC " Camera");
758 i->type = V4L2_INPUT_TYPE_CAMERA;
759 return 0;
760 }
761
762 static int zr364xx_vidioc_g_input(struct file *file, void *priv,
763 unsigned int *i)
764 {
765 *i = 0;
766 return 0;
767 }
768
769 static int zr364xx_vidioc_s_input(struct file *file, void *priv,
770 unsigned int i)
771 {
772 if (i != 0)
773 return -EINVAL;
774 return 0;
775 }
776
777 static int zr364xx_vidioc_queryctrl(struct file *file, void *priv,
778 struct v4l2_queryctrl *c)
779 {
780 struct zr364xx_camera *cam;
781
782 if (file == NULL)
783 return -ENODEV;
784 cam = video_drvdata(file);
785
786 switch (c->id) {
787 case V4L2_CID_BRIGHTNESS:
788 c->type = V4L2_CTRL_TYPE_INTEGER;
789 strcpy(c->name, "Brightness");
790 c->minimum = 0;
791 c->maximum = 127;
792 c->step = 1;
793 c->default_value = cam->mode.brightness;
794 c->flags = 0;
795 break;
796 default:
797 return -EINVAL;
798 }
799 return 0;
800 }
801
802 static int zr364xx_vidioc_s_ctrl(struct file *file, void *priv,
803 struct v4l2_control *c)
804 {
805 struct zr364xx_camera *cam;
806 int temp;
807
808 if (file == NULL)
809 return -ENODEV;
810 cam = video_drvdata(file);
811
812 switch (c->id) {
813 case V4L2_CID_BRIGHTNESS:
814 cam->mode.brightness = c->value;
815 /* hardware brightness */
816 mutex_lock(&cam->lock);
817 send_control_msg(cam->udev, 1, 0x2001, 0, NULL, 0);
818 temp = (0x60 << 8) + 127 - cam->mode.brightness;
819 send_control_msg(cam->udev, 1, temp, 0, NULL, 0);
820 mutex_unlock(&cam->lock);
821 break;
822 default:
823 return -EINVAL;
824 }
825
826 return 0;
827 }
828
829 static int zr364xx_vidioc_g_ctrl(struct file *file, void *priv,
830 struct v4l2_control *c)
831 {
832 struct zr364xx_camera *cam;
833
834 if (file == NULL)
835 return -ENODEV;
836 cam = video_drvdata(file);
837
838 switch (c->id) {
839 case V4L2_CID_BRIGHTNESS:
840 c->value = cam->mode.brightness;
841 break;
842 default:
843 return -EINVAL;
844 }
845 return 0;
846 }
847
848 static int zr364xx_vidioc_enum_fmt_vid_cap(struct file *file,
849 void *priv, struct v4l2_fmtdesc *f)
850 {
851 if (f->index > 0)
852 return -EINVAL;
853 f->flags = V4L2_FMT_FLAG_COMPRESSED;
854 strcpy(f->description, formats[0].name);
855 f->pixelformat = formats[0].fourcc;
856 return 0;
857 }
858
859 static char *decode_fourcc(__u32 pixelformat, char *buf)
860 {
861 buf[0] = pixelformat & 0xff;
862 buf[1] = (pixelformat >> 8) & 0xff;
863 buf[2] = (pixelformat >> 16) & 0xff;
864 buf[3] = (pixelformat >> 24) & 0xff;
865 buf[4] = '\0';
866 return buf;
867 }
868
869 static int zr364xx_vidioc_try_fmt_vid_cap(struct file *file, void *priv,
870 struct v4l2_format *f)
871 {
872 struct zr364xx_camera *cam = video_drvdata(file);
873 char pixelformat_name[5];
874
875 if (cam == NULL)
876 return -ENODEV;
877
878 if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG) {
879 DBG("%s: unsupported pixelformat V4L2_PIX_FMT_%s\n", __func__,
880 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name));
881 return -EINVAL;
882 }
883
884 if (!(f->fmt.pix.width == 160 && f->fmt.pix.height == 120) &&
885 !(f->fmt.pix.width == 640 && f->fmt.pix.height == 480)) {
886 f->fmt.pix.width = 320;
887 f->fmt.pix.height = 240;
888 }
889
890 f->fmt.pix.field = V4L2_FIELD_NONE;
891 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
892 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
893 f->fmt.pix.colorspace = 0;
894 f->fmt.pix.priv = 0;
895 DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
896 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
897 f->fmt.pix.field);
898 return 0;
899 }
900
901 static int zr364xx_vidioc_g_fmt_vid_cap(struct file *file, void *priv,
902 struct v4l2_format *f)
903 {
904 struct zr364xx_camera *cam;
905
906 if (file == NULL)
907 return -ENODEV;
908 cam = video_drvdata(file);
909
910 f->fmt.pix.pixelformat = formats[0].fourcc;
911 f->fmt.pix.field = V4L2_FIELD_NONE;
912 f->fmt.pix.width = cam->width;
913 f->fmt.pix.height = cam->height;
914 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
915 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
916 f->fmt.pix.colorspace = 0;
917 f->fmt.pix.priv = 0;
918 return 0;
919 }
920
921 static int zr364xx_vidioc_s_fmt_vid_cap(struct file *file, void *priv,
922 struct v4l2_format *f)
923 {
924 struct zr364xx_camera *cam = video_drvdata(file);
925 struct videobuf_queue *q = &cam->vb_vidq;
926 char pixelformat_name[5];
927 int ret = zr364xx_vidioc_try_fmt_vid_cap(file, cam, f);
928 int i;
929
930 if (ret < 0)
931 return ret;
932
933 mutex_lock(&q->vb_lock);
934
935 if (videobuf_queue_is_busy(&cam->vb_vidq)) {
936 DBG("%s queue busy\n", __func__);
937 ret = -EBUSY;
938 goto out;
939 }
940
941 if (res_check(cam)) {
942 DBG("%s can't change format after started\n", __func__);
943 ret = -EBUSY;
944 goto out;
945 }
946
947 cam->width = f->fmt.pix.width;
948 cam->height = f->fmt.pix.height;
949 dev_info(&cam->udev->dev, "%s: %dx%d mode selected\n", __func__,
950 cam->width, cam->height);
951 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
952 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
953 f->fmt.pix.colorspace = 0;
954 f->fmt.pix.priv = 0;
955 cam->vb_vidq.field = f->fmt.pix.field;
956 cam->mode.color = V4L2_PIX_FMT_JPEG;
957
958 if (f->fmt.pix.width == 160 && f->fmt.pix.height == 120)
959 mode = 1;
960 else if (f->fmt.pix.width == 640 && f->fmt.pix.height == 480)
961 mode = 2;
962 else
963 mode = 0;
964
965 m0d1[0] = mode;
966 m1[2].value = 0xf000 + mode;
967 m2[1].value = 0xf000 + mode;
968
969 /* special case for METHOD3, the modes are different */
970 if (cam->method == METHOD3) {
971 switch (mode) {
972 case 1:
973 m2[1].value = 0xf000 + 4;
974 break;
975 case 2:
976 m2[1].value = 0xf000 + 0;
977 break;
978 default:
979 m2[1].value = 0xf000 + 1;
980 break;
981 }
982 }
983
984 header2[437] = cam->height / 256;
985 header2[438] = cam->height % 256;
986 header2[439] = cam->width / 256;
987 header2[440] = cam->width % 256;
988
989 for (i = 0; init[cam->method][i].size != -1; i++) {
990 ret =
991 send_control_msg(cam->udev, 1, init[cam->method][i].value,
992 0, init[cam->method][i].bytes,
993 init[cam->method][i].size);
994 if (ret < 0) {
995 dev_err(&cam->udev->dev,
996 "error during resolution change sequence: %d\n", i);
997 goto out;
998 }
999 }
1000
1001 /* Added some delay here, since opening/closing the camera quickly,
1002 * like Ekiga does during its startup, can crash the webcam
1003 */
1004 mdelay(100);
1005 cam->skip = 2;
1006 ret = 0;
1007
1008 out:
1009 mutex_unlock(&q->vb_lock);
1010
1011 DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
1012 decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
1013 f->fmt.pix.field);
1014 return ret;
1015 }
1016
1017 static int zr364xx_vidioc_reqbufs(struct file *file, void *priv,
1018 struct v4l2_requestbuffers *p)
1019 {
1020 int rc;
1021 struct zr364xx_camera *cam = video_drvdata(file);
1022 rc = videobuf_reqbufs(&cam->vb_vidq, p);
1023 return rc;
1024 }
1025
1026 static int zr364xx_vidioc_querybuf(struct file *file,
1027 void *priv,
1028 struct v4l2_buffer *p)
1029 {
1030 int rc;
1031 struct zr364xx_camera *cam = video_drvdata(file);
1032 rc = videobuf_querybuf(&cam->vb_vidq, p);
1033 return rc;
1034 }
1035
1036 static int zr364xx_vidioc_qbuf(struct file *file,
1037 void *priv,
1038 struct v4l2_buffer *p)
1039 {
1040 int rc;
1041 struct zr364xx_camera *cam = video_drvdata(file);
1042 _DBG("%s\n", __func__);
1043 rc = videobuf_qbuf(&cam->vb_vidq, p);
1044 return rc;
1045 }
1046
1047 static int zr364xx_vidioc_dqbuf(struct file *file,
1048 void *priv,
1049 struct v4l2_buffer *p)
1050 {
1051 int rc;
1052 struct zr364xx_camera *cam = video_drvdata(file);
1053 _DBG("%s\n", __func__);
1054 rc = videobuf_dqbuf(&cam->vb_vidq, p, file->f_flags & O_NONBLOCK);
1055 return rc;
1056 }
1057
1058 static void read_pipe_completion(struct urb *purb)
1059 {
1060 struct zr364xx_pipeinfo *pipe_info;
1061 struct zr364xx_camera *cam;
1062 int pipe;
1063
1064 pipe_info = purb->context;
1065 _DBG("%s %p, status %d\n", __func__, purb, purb->status);
1066 if (pipe_info == NULL) {
1067 printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
1068 return;
1069 }
1070
1071 cam = pipe_info->cam;
1072 if (cam == NULL) {
1073 printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
1074 return;
1075 }
1076
1077 /* if shutting down, do not resubmit, exit immediately */
1078 if (purb->status == -ESHUTDOWN) {
1079 DBG("%s, err shutdown\n", __func__);
1080 pipe_info->err_count++;
1081 return;
1082 }
1083
1084 if (pipe_info->state == 0) {
1085 DBG("exiting USB pipe\n");
1086 return;
1087 }
1088
1089 if (purb->actual_length < 0 ||
1090 purb->actual_length > pipe_info->transfer_size) {
1091 dev_err(&cam->udev->dev, "wrong number of bytes\n");
1092 return;
1093 }
1094
1095 if (purb->status == 0)
1096 zr364xx_read_video_callback(cam, pipe_info, purb);
1097 else {
1098 pipe_info->err_count++;
1099 DBG("%s: failed URB %d\n", __func__, purb->status);
1100 }
1101
1102 pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
1103
1104 /* reuse urb */
1105 usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
1106 pipe,
1107 pipe_info->transfer_buffer,
1108 pipe_info->transfer_size,
1109 read_pipe_completion, pipe_info);
1110
1111 if (pipe_info->state != 0) {
1112 purb->status = usb_submit_urb(pipe_info->stream_urb,
1113 GFP_ATOMIC);
1114
1115 if (purb->status)
1116 dev_err(&cam->udev->dev,
1117 "error submitting urb (error=%i)\n",
1118 purb->status);
1119 } else
1120 DBG("read pipe complete state 0\n");
1121 }
1122
1123 static int zr364xx_start_readpipe(struct zr364xx_camera *cam)
1124 {
1125 int pipe;
1126 int retval;
1127 struct zr364xx_pipeinfo *pipe_info = cam->pipe;
1128 pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
1129 DBG("%s: start pipe IN x%x\n", __func__, cam->read_endpoint);
1130
1131 pipe_info->state = 1;
1132 pipe_info->err_count = 0;
1133 pipe_info->stream_urb = usb_alloc_urb(0, GFP_KERNEL);
1134 if (!pipe_info->stream_urb) {
1135 dev_err(&cam->udev->dev, "ReadStream: Unable to alloc URB\n");
1136 return -ENOMEM;
1137 }
1138 /* transfer buffer allocated in board_init */
1139 usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
1140 pipe,
1141 pipe_info->transfer_buffer,
1142 pipe_info->transfer_size,
1143 read_pipe_completion, pipe_info);
1144
1145 DBG("submitting URB %p\n", pipe_info->stream_urb);
1146 retval = usb_submit_urb(pipe_info->stream_urb, GFP_KERNEL);
1147 if (retval) {
1148 printk(KERN_ERR KBUILD_MODNAME ": start read pipe failed\n");
1149 return retval;
1150 }
1151
1152 return 0;
1153 }
1154
1155 static void zr364xx_stop_readpipe(struct zr364xx_camera *cam)
1156 {
1157 struct zr364xx_pipeinfo *pipe_info;
1158
1159 if (cam == NULL) {
1160 printk(KERN_ERR KBUILD_MODNAME ": invalid device\n");
1161 return;
1162 }
1163 DBG("stop read pipe\n");
1164 pipe_info = cam->pipe;
1165 if (pipe_info) {
1166 if (pipe_info->state != 0)
1167 pipe_info->state = 0;
1168
1169 if (pipe_info->stream_urb) {
1170 /* cancel urb */
1171 usb_kill_urb(pipe_info->stream_urb);
1172 usb_free_urb(pipe_info->stream_urb);
1173 pipe_info->stream_urb = NULL;
1174 }
1175 }
1176 return;
1177 }
1178
1179 /* starts acquisition process */
1180 static int zr364xx_start_acquire(struct zr364xx_camera *cam)
1181 {
1182 int j;
1183
1184 DBG("start acquire\n");
1185
1186 cam->last_frame = -1;
1187 cam->cur_frame = 0;
1188 for (j = 0; j < FRAMES; j++) {
1189 cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
1190 cam->buffer.frame[j].cur_size = 0;
1191 }
1192 cam->b_acquire = 1;
1193 return 0;
1194 }
1195
1196 static inline int zr364xx_stop_acquire(struct zr364xx_camera *cam)
1197 {
1198 cam->b_acquire = 0;
1199 return 0;
1200 }
1201
1202 static int zr364xx_vidioc_streamon(struct file *file, void *priv,
1203 enum v4l2_buf_type type)
1204 {
1205 struct zr364xx_camera *cam = video_drvdata(file);
1206 int j;
1207 int res;
1208
1209 DBG("%s\n", __func__);
1210
1211 if (cam->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1212 dev_err(&cam->udev->dev, "invalid fh type0\n");
1213 return -EINVAL;
1214 }
1215 if (cam->type != type) {
1216 dev_err(&cam->udev->dev, "invalid fh type1\n");
1217 return -EINVAL;
1218 }
1219
1220 if (!res_get(cam)) {
1221 dev_err(&cam->udev->dev, "stream busy\n");
1222 return -EBUSY;
1223 }
1224
1225 cam->last_frame = -1;
1226 cam->cur_frame = 0;
1227 cam->frame_count = 0;
1228 for (j = 0; j < FRAMES; j++) {
1229 cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
1230 cam->buffer.frame[j].cur_size = 0;
1231 }
1232 res = videobuf_streamon(&cam->vb_vidq);
1233 if (res == 0) {
1234 zr364xx_start_acquire(cam);
1235 } else {
1236 res_free(cam);
1237 }
1238 return res;
1239 }
1240
1241 static int zr364xx_vidioc_streamoff(struct file *file, void *priv,
1242 enum v4l2_buf_type type)
1243 {
1244 int res;
1245 struct zr364xx_camera *cam = video_drvdata(file);
1246
1247 DBG("%s\n", __func__);
1248 if (cam->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1249 dev_err(&cam->udev->dev, "invalid fh type0\n");
1250 return -EINVAL;
1251 }
1252 if (cam->type != type) {
1253 dev_err(&cam->udev->dev, "invalid fh type1\n");
1254 return -EINVAL;
1255 }
1256 zr364xx_stop_acquire(cam);
1257 res = videobuf_streamoff(&cam->vb_vidq);
1258 if (res < 0)
1259 return res;
1260 res_free(cam);
1261 return 0;
1262 }
1263
1264
1265 /* open the camera */
1266 static int zr364xx_open(struct file *file)
1267 {
1268 struct video_device *vdev = video_devdata(file);
1269 struct zr364xx_camera *cam = video_drvdata(file);
1270 struct usb_device *udev = cam->udev;
1271 int i, err;
1272
1273 DBG("%s\n", __func__);
1274
1275 mutex_lock(&cam->open_lock);
1276
1277 if (cam->users) {
1278 err = -EBUSY;
1279 goto out;
1280 }
1281
1282 for (i = 0; init[cam->method][i].size != -1; i++) {
1283 err =
1284 send_control_msg(udev, 1, init[cam->method][i].value,
1285 0, init[cam->method][i].bytes,
1286 init[cam->method][i].size);
1287 if (err < 0) {
1288 dev_err(&cam->udev->dev,
1289 "error during open sequence: %d\n", i);
1290 goto out;
1291 }
1292 }
1293
1294 cam->skip = 2;
1295 cam->users++;
1296 file->private_data = vdev;
1297 cam->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1298 cam->fmt = formats;
1299
1300 videobuf_queue_vmalloc_init(&cam->vb_vidq, &zr364xx_video_qops,
1301 NULL, &cam->slock,
1302 cam->type,
1303 V4L2_FIELD_NONE,
1304 sizeof(struct zr364xx_buffer), cam, NULL);
1305
1306 /* Added some delay here, since opening/closing the camera quickly,
1307 * like Ekiga does during its startup, can crash the webcam
1308 */
1309 mdelay(100);
1310 err = 0;
1311
1312 out:
1313 mutex_unlock(&cam->open_lock);
1314 DBG("%s: %d\n", __func__, err);
1315 return err;
1316 }
1317
1318 static void zr364xx_destroy(struct zr364xx_camera *cam)
1319 {
1320 unsigned long i;
1321
1322 if (!cam) {
1323 printk(KERN_ERR KBUILD_MODNAME ", %s: no device\n", __func__);
1324 return;
1325 }
1326 mutex_lock(&cam->open_lock);
1327 if (cam->vdev)
1328 video_unregister_device(cam->vdev);
1329 cam->vdev = NULL;
1330
1331 /* stops the read pipe if it is running */
1332 if (cam->b_acquire)
1333 zr364xx_stop_acquire(cam);
1334
1335 zr364xx_stop_readpipe(cam);
1336
1337 /* release sys buffers */
1338 for (i = 0; i < FRAMES; i++) {
1339 if (cam->buffer.frame[i].lpvbits) {
1340 DBG("vfree %p\n", cam->buffer.frame[i].lpvbits);
1341 vfree(cam->buffer.frame[i].lpvbits);
1342 }
1343 cam->buffer.frame[i].lpvbits = NULL;
1344 }
1345
1346 /* release transfer buffer */
1347 kfree(cam->pipe->transfer_buffer);
1348 cam->pipe->transfer_buffer = NULL;
1349 mutex_unlock(&cam->open_lock);
1350 kfree(cam);
1351 cam = NULL;
1352 }
1353
1354 /* release the camera */
1355 static int zr364xx_release(struct file *file)
1356 {
1357 struct zr364xx_camera *cam;
1358 struct usb_device *udev;
1359 int i, err;
1360
1361 DBG("%s\n", __func__);
1362 cam = video_drvdata(file);
1363
1364 if (!cam)
1365 return -ENODEV;
1366
1367 mutex_lock(&cam->open_lock);
1368 udev = cam->udev;
1369
1370 /* turn off stream */
1371 if (res_check(cam)) {
1372 if (cam->b_acquire)
1373 zr364xx_stop_acquire(cam);
1374 videobuf_streamoff(&cam->vb_vidq);
1375 res_free(cam);
1376 }
1377
1378 cam->users--;
1379 file->private_data = NULL;
1380
1381 for (i = 0; i < 2; i++) {
1382 err =
1383 send_control_msg(udev, 1, init[cam->method][i].value,
1384 0, init[cam->method][i].bytes,
1385 init[cam->method][i].size);
1386 if (err < 0) {
1387 dev_err(&udev->dev, "error during release sequence\n");
1388 goto out;
1389 }
1390 }
1391
1392 /* Added some delay here, since opening/closing the camera quickly,
1393 * like Ekiga does during its startup, can crash the webcam
1394 */
1395 mdelay(100);
1396 err = 0;
1397
1398 out:
1399 mutex_unlock(&cam->open_lock);
1400
1401 return err;
1402 }
1403
1404
1405 static int zr364xx_mmap(struct file *file, struct vm_area_struct *vma)
1406 {
1407 struct zr364xx_camera *cam = video_drvdata(file);
1408 int ret;
1409
1410 if (cam == NULL) {
1411 DBG("%s: cam == NULL\n", __func__);
1412 return -ENODEV;
1413 }
1414 DBG("mmap called, vma=0x%08lx\n", (unsigned long)vma);
1415
1416 ret = videobuf_mmap_mapper(&cam->vb_vidq, vma);
1417
1418 DBG("vma start=0x%08lx, size=%ld, ret=%d\n",
1419 (unsigned long)vma->vm_start,
1420 (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, ret);
1421 return ret;
1422 }
1423
1424 static unsigned int zr364xx_poll(struct file *file,
1425 struct poll_table_struct *wait)
1426 {
1427 struct zr364xx_camera *cam = video_drvdata(file);
1428 struct videobuf_queue *q = &cam->vb_vidq;
1429 _DBG("%s\n", __func__);
1430
1431 if (cam->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1432 return POLLERR;
1433
1434 return videobuf_poll_stream(file, q, wait);
1435 }
1436
1437 static const struct v4l2_file_operations zr364xx_fops = {
1438 .owner = THIS_MODULE,
1439 .open = zr364xx_open,
1440 .release = zr364xx_release,
1441 .read = zr364xx_read,
1442 .mmap = zr364xx_mmap,
1443 .ioctl = video_ioctl2,
1444 .poll = zr364xx_poll,
1445 };
1446
1447 static const struct v4l2_ioctl_ops zr364xx_ioctl_ops = {
1448 .vidioc_querycap = zr364xx_vidioc_querycap,
1449 .vidioc_enum_fmt_vid_cap = zr364xx_vidioc_enum_fmt_vid_cap,
1450 .vidioc_try_fmt_vid_cap = zr364xx_vidioc_try_fmt_vid_cap,
1451 .vidioc_s_fmt_vid_cap = zr364xx_vidioc_s_fmt_vid_cap,
1452 .vidioc_g_fmt_vid_cap = zr364xx_vidioc_g_fmt_vid_cap,
1453 .vidioc_enum_input = zr364xx_vidioc_enum_input,
1454 .vidioc_g_input = zr364xx_vidioc_g_input,
1455 .vidioc_s_input = zr364xx_vidioc_s_input,
1456 .vidioc_streamon = zr364xx_vidioc_streamon,
1457 .vidioc_streamoff = zr364xx_vidioc_streamoff,
1458 .vidioc_queryctrl = zr364xx_vidioc_queryctrl,
1459 .vidioc_g_ctrl = zr364xx_vidioc_g_ctrl,
1460 .vidioc_s_ctrl = zr364xx_vidioc_s_ctrl,
1461 .vidioc_reqbufs = zr364xx_vidioc_reqbufs,
1462 .vidioc_querybuf = zr364xx_vidioc_querybuf,
1463 .vidioc_qbuf = zr364xx_vidioc_qbuf,
1464 .vidioc_dqbuf = zr364xx_vidioc_dqbuf,
1465 };
1466
1467 static struct video_device zr364xx_template = {
1468 .name = DRIVER_DESC,
1469 .fops = &zr364xx_fops,
1470 .ioctl_ops = &zr364xx_ioctl_ops,
1471 .release = video_device_release,
1472 };
1473
1474
1475
1476 /*******************/
1477 /* USB integration */
1478 /*******************/
1479 static int zr364xx_board_init(struct zr364xx_camera *cam)
1480 {
1481 struct zr364xx_pipeinfo *pipe = cam->pipe;
1482 unsigned long i;
1483
1484 DBG("board init: %p\n", cam);
1485 memset(pipe, 0, sizeof(*pipe));
1486 pipe->cam = cam;
1487 pipe->transfer_size = BUFFER_SIZE;
1488
1489 pipe->transfer_buffer = kzalloc(pipe->transfer_size,
1490 GFP_KERNEL);
1491 if (pipe->transfer_buffer == NULL) {
1492 DBG("out of memory!\n");
1493 return -ENOMEM;
1494 }
1495
1496 cam->b_acquire = 0;
1497 cam->frame_count = 0;
1498
1499 /*** start create system buffers ***/
1500 for (i = 0; i < FRAMES; i++) {
1501 /* always allocate maximum size for system buffers */
1502 cam->buffer.frame[i].lpvbits = vmalloc(MAX_FRAME_SIZE);
1503
1504 DBG("valloc %p, idx %lu, pdata %p\n",
1505 &cam->buffer.frame[i], i,
1506 cam->buffer.frame[i].lpvbits);
1507 if (cam->buffer.frame[i].lpvbits == NULL) {
1508 printk(KERN_INFO KBUILD_MODNAME ": out of memory. "
1509 "Using less frames\n");
1510 break;
1511 }
1512 }
1513
1514 if (i == 0) {
1515 printk(KERN_INFO KBUILD_MODNAME ": out of memory. Aborting\n");
1516 kfree(cam->pipe->transfer_buffer);
1517 cam->pipe->transfer_buffer = NULL;
1518 return -ENOMEM;
1519 } else
1520 cam->buffer.dwFrames = i;
1521
1522 /* make sure internal states are set */
1523 for (i = 0; i < FRAMES; i++) {
1524 cam->buffer.frame[i].ulState = ZR364XX_READ_IDLE;
1525 cam->buffer.frame[i].cur_size = 0;
1526 }
1527
1528 cam->cur_frame = 0;
1529 cam->last_frame = -1;
1530 /*** end create system buffers ***/
1531
1532 /* start read pipe */
1533 zr364xx_start_readpipe(cam);
1534 DBG(": board initialized\n");
1535 return 0;
1536 }
1537
1538 static int zr364xx_probe(struct usb_interface *intf,
1539 const struct usb_device_id *id)
1540 {
1541 struct usb_device *udev = interface_to_usbdev(intf);
1542 struct zr364xx_camera *cam = NULL;
1543 struct usb_host_interface *iface_desc;
1544 struct usb_endpoint_descriptor *endpoint;
1545 int err;
1546 int i;
1547
1548 DBG("probing...\n");
1549
1550 dev_info(&intf->dev, DRIVER_DESC " compatible webcam plugged\n");
1551 dev_info(&intf->dev, "model %04x:%04x detected\n",
1552 le16_to_cpu(udev->descriptor.idVendor),
1553 le16_to_cpu(udev->descriptor.idProduct));
1554
1555 cam = kzalloc(sizeof(struct zr364xx_camera), GFP_KERNEL);
1556 if (cam == NULL) {
1557 dev_err(&udev->dev, "cam: out of memory !\n");
1558 return -ENOMEM;
1559 }
1560 /* save the init method used by this camera */
1561 cam->method = id->driver_info;
1562
1563 cam->vdev = video_device_alloc();
1564 if (cam->vdev == NULL) {
1565 dev_err(&udev->dev, "cam->vdev: out of memory !\n");
1566 kfree(cam);
1567 cam = NULL;
1568 return -ENOMEM;
1569 }
1570 memcpy(cam->vdev, &zr364xx_template, sizeof(zr364xx_template));
1571 cam->vdev->parent = &intf->dev;
1572 video_set_drvdata(cam->vdev, cam);
1573 if (debug)
1574 cam->vdev->debug = V4L2_DEBUG_IOCTL | V4L2_DEBUG_IOCTL_ARG;
1575
1576 cam->udev = udev;
1577
1578 switch (mode) {
1579 case 1:
1580 dev_info(&udev->dev, "160x120 mode selected\n");
1581 cam->width = 160;
1582 cam->height = 120;
1583 break;
1584 case 2:
1585 dev_info(&udev->dev, "640x480 mode selected\n");
1586 cam->width = 640;
1587 cam->height = 480;
1588 break;
1589 default:
1590 dev_info(&udev->dev, "320x240 mode selected\n");
1591 cam->width = 320;
1592 cam->height = 240;
1593 break;
1594 }
1595
1596 m0d1[0] = mode;
1597 m1[2].value = 0xf000 + mode;
1598 m2[1].value = 0xf000 + mode;
1599
1600 /* special case for METHOD3, the modes are different */
1601 if (cam->method == METHOD3) {
1602 switch (mode) {
1603 case 1:
1604 m2[1].value = 0xf000 + 4;
1605 break;
1606 case 2:
1607 m2[1].value = 0xf000 + 0;
1608 break;
1609 default:
1610 m2[1].value = 0xf000 + 1;
1611 break;
1612 }
1613 }
1614
1615 header2[437] = cam->height / 256;
1616 header2[438] = cam->height % 256;
1617 header2[439] = cam->width / 256;
1618 header2[440] = cam->width % 256;
1619
1620 cam->users = 0;
1621 cam->nb = 0;
1622 cam->mode.brightness = 64;
1623 mutex_init(&cam->lock);
1624 mutex_init(&cam->open_lock);
1625
1626 DBG("dev: %p, udev %p interface %p\n", cam, cam->udev, intf);
1627
1628 /* set up the endpoint information */
1629 iface_desc = intf->cur_altsetting;
1630 DBG("num endpoints %d\n", iface_desc->desc.bNumEndpoints);
1631 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1632 endpoint = &iface_desc->endpoint[i].desc;
1633 if (!cam->read_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
1634 /* we found the bulk in endpoint */
1635 cam->read_endpoint = endpoint->bEndpointAddress;
1636 }
1637 }
1638
1639 if (!cam->read_endpoint) {
1640 dev_err(&intf->dev, "Could not find bulk-in endpoint\n");
1641 return -ENOMEM;
1642 }
1643
1644 /* v4l */
1645 INIT_LIST_HEAD(&cam->vidq.active);
1646 cam->vidq.cam = cam;
1647 err = video_register_device(cam->vdev, VFL_TYPE_GRABBER, -1);
1648 if (err) {
1649 dev_err(&udev->dev, "video_register_device failed\n");
1650 video_device_release(cam->vdev);
1651 kfree(cam);
1652 cam = NULL;
1653 return err;
1654 }
1655
1656 usb_set_intfdata(intf, cam);
1657
1658 /* load zr364xx board specific */
1659 err = zr364xx_board_init(cam);
1660 if (err) {
1661 spin_lock_init(&cam->slock);
1662 return err;
1663 }
1664
1665 spin_lock_init(&cam->slock);
1666
1667 dev_info(&udev->dev, DRIVER_DESC " controlling device %s\n",
1668 video_device_node_name(cam->vdev));
1669 return 0;
1670 }
1671
1672
1673 static void zr364xx_disconnect(struct usb_interface *intf)
1674 {
1675 struct zr364xx_camera *cam = usb_get_intfdata(intf);
1676 videobuf_mmap_free(&cam->vb_vidq);
1677 usb_set_intfdata(intf, NULL);
1678 dev_info(&intf->dev, DRIVER_DESC " webcam unplugged\n");
1679 zr364xx_destroy(cam);
1680 }
1681
1682
1683
1684 /**********************/
1685 /* Module integration */
1686 /**********************/
1687
1688 static struct usb_driver zr364xx_driver = {
1689 .name = "zr364xx",
1690 .probe = zr364xx_probe,
1691 .disconnect = zr364xx_disconnect,
1692 .id_table = device_table
1693 };
1694
1695
1696 static int __init zr364xx_init(void)
1697 {
1698 int retval;
1699 retval = usb_register(&zr364xx_driver);
1700 if (retval)
1701 printk(KERN_ERR KBUILD_MODNAME ": usb_register failed!\n");
1702 else
1703 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
1704 return retval;
1705 }
1706
1707
1708 static void __exit zr364xx_exit(void)
1709 {
1710 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC " module unloaded\n");
1711 usb_deregister(&zr364xx_driver);
1712 }
1713
1714
1715 module_init(zr364xx_init);
1716 module_exit(zr364xx_exit);
1717
1718 MODULE_AUTHOR(DRIVER_AUTHOR);
1719 MODULE_DESCRIPTION(DRIVER_DESC);
1720 MODULE_LICENSE("GPL");
1721 MODULE_VERSION(DRIVER_VERSION);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree