drivers/media/usb/zr364xx/zr364xx.c

   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 development !
   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
  26
  27 #include <linux/module.h>
  28 #include <linux/init.h>
  29 #include <linux/usb.h>
  30 #include <linux/vmalloc.h>
  31 #include <linux/slab.h>
  32 #include <linux/proc_fs.h>
  33 #include <linux/highmem.h>
  34 #include <media/v4l2-common.h>
  35 #include <media/v4l2-ioctl.h>
  36 #include <media/v4l2-device.h>
  37 #include <media/v4l2-ctrls.h>
  38 #include <media/v4l2-fh.h>
  39 #include <media/v4l2-event.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 const 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 /* frame structure */
 124 struct zr364xx_framei {
 125         unsigned long ulState;  /* ulState:ZR364XX_READ_IDLE,
 126                                            ZR364XX_READ_FRAME */
 127         void *lpvbits;          /* image data */
 128         unsigned long cur_size; /* current data copied to it */
 129 };
 130
 131 /* image buffer structure */
 132 struct zr364xx_bufferi {
 133         unsigned long dwFrames;                 /* number of frames in buffer */
 134         struct zr364xx_framei frame[FRAMES];    /* array of FRAME structures */
 135 };
 136
 137 struct zr364xx_dmaqueue {
 138         struct list_head        active;
 139         struct zr364xx_camera   *cam;
 140 };
 141
 142 struct zr364xx_pipeinfo {
 143         u32 transfer_size;
 144         u8 *transfer_buffer;
 145         u32 state;
 146         void *stream_urb;
 147         void *cam;      /* back pointer to zr364xx_camera struct */
 148         u32 err_count;
 149         u32 idx;
 150 };
 151
 152 struct zr364xx_fmt {
 153         char *name;
 154         u32 fourcc;
 155         int depth;
 156 };
 157
 158 /* image formats.  */
 159 static const struct zr364xx_fmt formats[] = {
 160         {
 161                 .name = "JPG",
 162                 .fourcc = V4L2_PIX_FMT_JPEG,
 163                 .depth = 24
 164         }
 165 };
 166
 167 /* Camera stuff */
 168 struct zr364xx_camera {
 169         struct usb_device *udev;        /* save off the usb device pointer */
 170         struct usb_interface *interface;/* the interface for this device */
 171         struct v4l2_device v4l2_dev;
 172         struct v4l2_ctrl_handler ctrl_handler;
 173         struct video_device vdev;       /* v4l video device */
 174         struct v4l2_fh *owner;          /* owns the streaming */
 175         int nb;
 176         struct zr364xx_bufferi          buffer;
 177         int skip;
 178         int width;
 179         int height;
 180         int method;
 181         struct mutex lock;
 182
 183         spinlock_t              slock;
 184         struct zr364xx_dmaqueue vidq;
 185         int                     last_frame;
 186         int                     cur_frame;
 187         unsigned long           frame_count;
 188         int                     b_acquire;
 189         struct zr364xx_pipeinfo pipe[1];
 190
 191         u8                      read_endpoint;
 192
 193         const struct zr364xx_fmt *fmt;
 194         struct videobuf_queue   vb_vidq;
 195         bool was_streaming;
 196 };
 197
 198 /* buffer for one video frame */
 199 struct zr364xx_buffer {
 200         /* common v4l buffer stuff -- must be first */
 201         struct videobuf_buffer vb;
 202         const struct zr364xx_fmt *fmt;
 203 };
 204
 205 /* function used to send initialisation commands to the camera */
 206 static int send_control_msg(struct usb_device *udev, u8 request, u16 value,
 207                             u16 index, unsigned char *cp, u16 size)
 208 {
 209         int status;
 210
 211         unsigned char *transfer_buffer = kmalloc(size, GFP_KERNEL);
 212         if (!transfer_buffer)
 213                 return -ENOMEM;
 214
 215         memcpy(transfer_buffer, cp, size);
 216
 217         status = usb_control_msg(udev,
 218                                  usb_sndctrlpipe(udev, 0),
 219                                  request,
 220                                  USB_DIR_OUT | USB_TYPE_VENDOR |
 221                                  USB_RECIP_DEVICE, value, index,
 222                                  transfer_buffer, size, CTRL_TIMEOUT);
 223
 224         kfree(transfer_buffer);
 225         return status;
 226 }
 227
 228
 229 /* Control messages sent to the camera to initialize it
 230  * and launch the capture */
 231 typedef struct {
 232         unsigned int value;
 233         unsigned int size;
 234         unsigned char *bytes;
 235 } message;
 236
 237 /* method 0 */
 238 static unsigned char m0d1[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
 239 static unsigned char m0d2[] = { 0, 0, 0, 0, 0, 0 };
 240 static unsigned char m0d3[] = { 0, 0 };
 241 static message m0[] = {
 242         {0x1f30, 0, NULL},
 243         {0xd000, 0, NULL},
 244         {0x3370, sizeof(m0d1), m0d1},
 245         {0x2000, 0, NULL},
 246         {0x2f0f, 0, NULL},
 247         {0x2610, sizeof(m0d2), m0d2},
 248         {0xe107, 0, NULL},
 249         {0x2502, 0, NULL},
 250         {0x1f70, 0, NULL},
 251         {0xd000, 0, NULL},
 252         {0x9a01, sizeof(m0d3), m0d3},
 253         {-1, -1, NULL}
 254 };
 255
 256 /* method 1 */
 257 static unsigned char m1d1[] = { 0xff, 0xff };
 258 static unsigned char m1d2[] = { 0x00, 0x00 };
 259 static message m1[] = {
 260         {0x1f30, 0, NULL},
 261         {0xd000, 0, NULL},
 262         {0xf000, 0, NULL},
 263         {0x2000, 0, NULL},
 264         {0x2f0f, 0, NULL},
 265         {0x2650, 0, NULL},
 266         {0xe107, 0, NULL},
 267         {0x2502, sizeof(m1d1), m1d1},
 268         {0x1f70, 0, NULL},
 269         {0xd000, 0, NULL},
 270         {0xd000, 0, NULL},
 271         {0xd000, 0, NULL},
 272         {0x9a01, sizeof(m1d2), m1d2},
 273         {-1, -1, NULL}
 274 };
 275
 276 /* method 2 */
 277 static unsigned char m2d1[] = { 0xff, 0xff };
 278 static message m2[] = {
 279         {0x1f30, 0, NULL},
 280         {0xf000, 0, NULL},
 281         {0x2000, 0, NULL},
 282         {0x2f0f, 0, NULL},
 283         {0x2650, 0, NULL},
 284         {0xe107, 0, NULL},
 285         {0x2502, sizeof(m2d1), m2d1},
 286         {0x1f70, 0, NULL},
 287         {-1, -1, NULL}
 288 };
 289
 290 /* init table */
 291 static message *init[4] = { m0, m1, m2, m2 };
 292
 293
 294 /* JPEG static data in header (Huffman table, etc) */
 295 static unsigned char header1[] = {
 296         0xFF, 0xD8,
 297         /*
 298         0xFF, 0xE0, 0x00, 0x10, 'J', 'F', 'I', 'F',
 299         0x00, 0x01, 0x01, 0x00, 0x33, 0x8A, 0x00, 0x00, 0x33, 0x88,
 300         */
 301         0xFF, 0xDB, 0x00, 0x84
 302 };
 303 static unsigned char header2[] = {
 304         0xFF, 0xC4, 0x00, 0x1F, 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01,
 305         0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 306         0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
 307         0xFF, 0xC4, 0x00, 0xB5, 0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02,
 308         0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7D, 0x01,
 309         0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06,
 310         0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1,
 311         0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, 0x24, 0x33,
 312         0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25,
 313         0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
 314         0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54,
 315         0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67,
 316         0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A,
 317         0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94,
 318         0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6,
 319         0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8,
 320         0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA,
 321         0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2,
 322         0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3,
 323         0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFF, 0xC4, 0x00, 0x1F,
 324         0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
 325         0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04,
 326         0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0xFF, 0xC4, 0x00, 0xB5,
 327         0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05,
 328         0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11,
 329         0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
 330         0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1,
 331         0x09, 0x23, 0x33, 0x52, 0xF0, 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16,
 332         0x24, 0x34, 0xE1, 0x25, 0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, 0x27,
 333         0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44,
 334         0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57,
 335         0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
 336         0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x82, 0x83, 0x84,
 337         0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96,
 338         0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8,
 339         0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA,
 340         0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3,
 341         0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5,
 342         0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
 343         0xF8, 0xF9, 0xFA, 0xFF, 0xC0, 0x00, 0x11, 0x08, 0x00, 0xF0, 0x01,
 344         0x40, 0x03, 0x01, 0x21, 0x00, 0x02, 0x11, 0x01, 0x03, 0x11, 0x01,
 345         0xFF, 0xDA, 0x00, 0x0C, 0x03, 0x01, 0x00, 0x02, 0x11, 0x03, 0x11,
 346         0x00, 0x3F, 0x00
 347 };
 348 static unsigned char header3;
 349
 350 /* ------------------------------------------------------------------
 351    Videobuf operations
 352    ------------------------------------------------------------------*/
 353
 354 static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
 355                         unsigned int *size)
 356 {
 357         struct zr364xx_camera *cam = vq->priv_data;
 358
 359         *size = cam->width * cam->height * (cam->fmt->depth >> 3);
 360
 361         if (*count == 0)
 362                 *count = ZR364XX_DEF_BUFS;
 363
 364         if (*size * *count > ZR364XX_DEF_BUFS * 1024 * 1024)
 365                 *count = (ZR364XX_DEF_BUFS * 1024 * 1024) / *size;
 366
 367         return 0;
 368 }
 369
 370 static void free_buffer(struct videobuf_queue *vq, struct zr364xx_buffer *buf)
 371 {
 372         _DBG("%s\n", __func__);
 373
 374         BUG_ON(in_interrupt());
 375
 376         videobuf_vmalloc_free(&buf->vb);
 377         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 378 }
 379
 380 static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
 381                           enum v4l2_field field)
 382 {
 383         struct zr364xx_camera *cam = vq->priv_data;
 384         struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
 385                                                   vb);
 386         int rc;
 387
 388         DBG("%s, field=%d, fmt name = %s\n", __func__, field,
 389             cam->fmt ? cam->fmt->name : "");
 390         if (!cam->fmt)
 391                 return -EINVAL;
 392
 393         buf->vb.size = cam->width * cam->height * (cam->fmt->depth >> 3);
 394
 395         if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size) {
 396                 DBG("invalid buffer prepare\n");
 397                 return -EINVAL;
 398         }
 399
 400         buf->fmt = cam->fmt;
 401         buf->vb.width = cam->width;
 402         buf->vb.height = cam->height;
 403         buf->vb.field = field;
 404
 405         if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
 406                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 407                 if (rc < 0)
 408                         goto fail;
 409         }
 410
 411         buf->vb.state = VIDEOBUF_PREPARED;
 412         return 0;
 413 fail:
 414         free_buffer(vq, buf);
 415         return rc;
 416 }
 417
 418 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 419 {
 420         struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
 421                                                   vb);
 422         struct zr364xx_camera *cam = vq->priv_data;
 423
 424         _DBG("%s\n", __func__);
 425
 426         buf->vb.state = VIDEOBUF_QUEUED;
 427         list_add_tail(&buf->vb.queue, &cam->vidq.active);
 428 }
 429
 430 static void buffer_release(struct videobuf_queue *vq,
 431                            struct videobuf_buffer *vb)
 432 {
 433         struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
 434                                                   vb);
 435
 436         _DBG("%s\n", __func__);
 437         free_buffer(vq, buf);
 438 }
 439
 440 static const struct videobuf_queue_ops zr364xx_video_qops = {
 441         .buf_setup = buffer_setup,
 442         .buf_prepare = buffer_prepare,
 443         .buf_queue = buffer_queue,
 444         .buf_release = buffer_release,
 445 };
 446
 447 /********************/
 448 /* V4L2 integration */
 449 /********************/
 450 static int zr364xx_vidioc_streamon(struct file *file, void *priv,
 451                                    enum v4l2_buf_type type);
 452
 453 static ssize_t zr364xx_read(struct file *file, char __user *buf, size_t count,
 454                             loff_t * ppos)
 455 {
 456         struct zr364xx_camera *cam = video_drvdata(file);
 457         int err = 0;
 458
 459         _DBG("%s\n", __func__);
 460
 461         if (!buf)
 462                 return -EINVAL;
 463
 464         if (!count)
 465                 return -EINVAL;
 466
 467         if (mutex_lock_interruptible(&cam->lock))
 468                 return -ERESTARTSYS;
 469
 470         err = zr364xx_vidioc_streamon(file, file->private_data,
 471                                 V4L2_BUF_TYPE_VIDEO_CAPTURE);
 472         if (err == 0) {
 473                 DBG("%s: reading %d bytes at pos %d.\n", __func__,
 474                                 (int) count, (int) *ppos);
 475
 476                 /* NoMan Sux ! */
 477                 err = videobuf_read_one(&cam->vb_vidq, buf, count, ppos,
 478                                         file->f_flags & O_NONBLOCK);
 479         }
 480         mutex_unlock(&cam->lock);
 481         return err;
 482 }
 483
 484 /* video buffer vmalloc implementation based partly on VIVI driver which is
 485  *          Copyright (c) 2006 by
 486  *                  Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
 487  *                  Ted Walther <ted--a.t--enumera.com>
 488  *                  John Sokol <sokol--a.t--videotechnology.com>
 489  *                  http://v4l.videotechnology.com/
 490  *
 491  */
 492 static void zr364xx_fillbuff(struct zr364xx_camera *cam,
 493                              struct zr364xx_buffer *buf,
 494                              int jpgsize)
 495 {
 496         int pos = 0;
 497         const char *tmpbuf;
 498         char *vbuf = videobuf_to_vmalloc(&buf->vb);
 499         unsigned long last_frame;
 500
 501         if (!vbuf)
 502                 return;
 503
 504         last_frame = cam->last_frame;
 505         if (last_frame != -1) {
 506                 tmpbuf = (const char *)cam->buffer.frame[last_frame].lpvbits;
 507                 switch (buf->fmt->fourcc) {
 508                 case V4L2_PIX_FMT_JPEG:
 509                         buf->vb.size = jpgsize;
 510                         memcpy(vbuf, tmpbuf, buf->vb.size);
 511                         break;
 512                 default:
 513                         printk(KERN_DEBUG KBUILD_MODNAME ": unknown format?\n");
 514                 }
 515                 cam->last_frame = -1;
 516         } else {
 517                 printk(KERN_ERR KBUILD_MODNAME ": =======no frame\n");
 518                 return;
 519         }
 520         DBG("%s: Buffer %p size= %d\n", __func__, vbuf, pos);
 521         /* tell v4l buffer was filled */
 522
 523         buf->vb.field_count = cam->frame_count * 2;
 524         buf->vb.ts = ktime_get_ns();
 525         buf->vb.state = VIDEOBUF_DONE;
 526 }
 527
 528 static int zr364xx_got_frame(struct zr364xx_camera *cam, int jpgsize)
 529 {
 530         struct zr364xx_dmaqueue *dma_q = &cam->vidq;
 531         struct zr364xx_buffer *buf;
 532         unsigned long flags = 0;
 533         int rc = 0;
 534
 535         DBG("wakeup: %p\n", &dma_q);
 536         spin_lock_irqsave(&cam->slock, flags);
 537
 538         if (list_empty(&dma_q->active)) {
 539                 DBG("No active queue to serve\n");
 540                 rc = -1;
 541                 goto unlock;
 542         }
 543         buf = list_entry(dma_q->active.next,
 544                          struct zr364xx_buffer, vb.queue);
 545
 546         if (!waitqueue_active(&buf->vb.done)) {
 547                 /* no one active */
 548                 rc = -1;
 549                 goto unlock;
 550         }
 551         list_del(&buf->vb.queue);
 552         buf->vb.ts = ktime_get_ns();
 553         DBG("[%p/%d] wakeup\n", buf, buf->vb.i);
 554         zr364xx_fillbuff(cam, buf, jpgsize);
 555         wake_up(&buf->vb.done);
 556         DBG("wakeup [buf/i] [%p/%d]\n", buf, buf->vb.i);
 557 unlock:
 558         spin_unlock_irqrestore(&cam->slock, flags);
 559         return rc;
 560 }
 561
 562 /* this function moves the usb stream read pipe data
 563  * into the system buffers.
 564  * returns 0 on success, EAGAIN if more data to process (call this
 565  * function again).
 566  */
 567 static int zr364xx_read_video_callback(struct zr364xx_camera *cam,
 568                                         struct zr364xx_pipeinfo *pipe_info,
 569                                         struct urb *purb)
 570 {
 571         unsigned char *pdest;
 572         unsigned char *psrc;
 573         s32 idx = -1;
 574         struct zr364xx_framei *frm;
 575         int i = 0;
 576         unsigned char *ptr = NULL;
 577
 578         _DBG("buffer to user\n");
 579         idx = cam->cur_frame;
 580         frm = &cam->buffer.frame[idx];
 581
 582         /* swap bytes if camera needs it */
 583         if (cam->method == METHOD0) {
 584                 u16 *buf = (u16 *)pipe_info->transfer_buffer;
 585                 for (i = 0; i < purb->actual_length/2; i++)
 586                         swab16s(buf + i);
 587         }
 588
 589         /* search done.  now find out if should be acquiring */
 590         if (!cam->b_acquire) {
 591                 /* we found a frame, but this channel is turned off */
 592                 frm->ulState = ZR364XX_READ_IDLE;
 593                 return -EINVAL;
 594         }
 595
 596         psrc = (u8 *)pipe_info->transfer_buffer;
 597         ptr = pdest = frm->lpvbits;
 598
 599         if (frm->ulState == ZR364XX_READ_IDLE) {
 600                 if (purb->actual_length < 128) {
 601                         /* header incomplete */
 602                         dev_info(&cam->udev->dev,
 603                                  "%s: buffer (%d bytes) too small to hold jpeg header. Discarding.\n",
 604                                  __func__, purb->actual_length);
 605                         return -EINVAL;
 606                 }
 607
 608                 frm->ulState = ZR364XX_READ_FRAME;
 609                 frm->cur_size = 0;
 610
 611                 _DBG("jpeg header, ");
 612                 memcpy(ptr, header1, sizeof(header1));
 613                 ptr += sizeof(header1);
 614                 header3 = 0;
 615                 memcpy(ptr, &header3, 1);
 616                 ptr++;
 617                 memcpy(ptr, psrc, 64);
 618                 ptr += 64;
 619                 header3 = 1;
 620                 memcpy(ptr, &header3, 1);
 621                 ptr++;
 622                 memcpy(ptr, psrc + 64, 64);
 623                 ptr += 64;
 624                 memcpy(ptr, header2, sizeof(header2));
 625                 ptr += sizeof(header2);
 626                 memcpy(ptr, psrc + 128,
 627                        purb->actual_length - 128);
 628                 ptr += purb->actual_length - 128;
 629                 _DBG("header : %d %d %d %d %d %d %d %d %d\n",
 630                     psrc[0], psrc[1], psrc[2],
 631                     psrc[3], psrc[4], psrc[5],
 632                     psrc[6], psrc[7], psrc[8]);
 633                 frm->cur_size = ptr - pdest;
 634         } else {
 635                 if (frm->cur_size + purb->actual_length > MAX_FRAME_SIZE) {
 636                         dev_info(&cam->udev->dev,
 637                                  "%s: buffer (%d bytes) too small to hold 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         strscpy(cap->driver, DRIVER_DESC, sizeof(cap->driver));
 706         strscpy(cap->card, cam->udev->product, sizeof(cap->card));
 707         strscpy(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         strscpy(i->name, DRIVER_DESC " Camera", sizeof(i->name));
 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         strscpy(f->description, formats[0].name, sizeof(f->description));
 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)
 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)
 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) {
 982                 printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
 983                 return;
 984         }
 985
 986         cam = pipe_info->cam;
 987         if (!cam) {
 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) {
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) {
1276                 DBG("%s: cam == NULL\n", __func__);
1277                 return -ENODEV;
1278         }
1279         DBG("mmap called, vma=%p\n", 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 __poll_t 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         __poll_t 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 const 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) {
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) {
1376                         printk(KERN_INFO KBUILD_MODNAME ": out of memory. Using less frames\n");
1377                         break;
1378                 }
1379         }
1380
1381         if (i == 0) {
1382                 printk(KERN_INFO KBUILD_MODNAME ": out of memory. Aborting\n");
1383                 kfree(cam->pipe->transfer_buffer);
1384                 cam->pipe->transfer_buffer = NULL;
1385                 return -ENOMEM;
1386         } else
1387                 cam->buffer.dwFrames = i;
1388
1389         /* make sure internal states are set */
1390         for (i = 0; i < FRAMES; i++) {
1391                 cam->buffer.frame[i].ulState = ZR364XX_READ_IDLE;
1392                 cam->buffer.frame[i].cur_size = 0;
1393         }
1394
1395         cam->cur_frame = 0;
1396         cam->last_frame = -1;
1397         /*** end create system buffers ***/
1398
1399         /* start read pipe */
1400         zr364xx_start_readpipe(cam);
1401         DBG(": board initialized\n");
1402         return 0;
1403 }
1404
1405 static int zr364xx_probe(struct usb_interface *intf,
1406                          const struct usb_device_id *id)
1407 {
1408         struct usb_device *udev = interface_to_usbdev(intf);
1409         struct zr364xx_camera *cam = NULL;
1410         struct usb_host_interface *iface_desc;
1411         struct usb_endpoint_descriptor *endpoint;
1412         struct v4l2_ctrl_handler *hdl;
1413         int err;
1414         int i;
1415
1416         DBG("probing...\n");
1417
1418         dev_info(&intf->dev, DRIVER_DESC " compatible webcam plugged\n");
1419         dev_info(&intf->dev, "model %04x:%04x detected\n",
1420                  le16_to_cpu(udev->descriptor.idVendor),
1421                  le16_to_cpu(udev->descriptor.idProduct));
1422
1423         cam = kzalloc(sizeof(*cam), GFP_KERNEL);
1424         if (!cam)
1425                 return -ENOMEM;
1426
1427         cam->v4l2_dev.release = zr364xx_release;
1428         err = v4l2_device_register(&intf->dev, &cam->v4l2_dev);
1429         if (err < 0) {
1430                 dev_err(&udev->dev, "couldn't register v4l2_device\n");
1431                 kfree(cam);
1432                 return err;
1433         }
1434         hdl = &cam->ctrl_handler;
1435         v4l2_ctrl_handler_init(hdl, 1);
1436         v4l2_ctrl_new_std(hdl, &zr364xx_ctrl_ops,
1437                           V4L2_CID_BRIGHTNESS, 0, 127, 1, 64);
1438         if (hdl->error) {
1439                 err = hdl->error;
1440                 dev_err(&udev->dev, "couldn't register control\n");
1441                 goto fail;
1442         }
1443         /* save the init method used by this camera */
1444         cam->method = id->driver_info;
1445         mutex_init(&cam->lock);
1446         cam->vdev = zr364xx_template;
1447         cam->vdev.lock = &cam->lock;
1448         cam->vdev.v4l2_dev = &cam->v4l2_dev;
1449         cam->vdev.ctrl_handler = &cam->ctrl_handler;
1450         video_set_drvdata(&cam->vdev, cam);
1451
1452         cam->udev = udev;
1453
1454         switch (mode) {
1455         case 1:
1456                 dev_info(&udev->dev, "160x120 mode selected\n");
1457                 cam->width = 160;
1458                 cam->height = 120;
1459                 break;
1460         case 2:
1461                 dev_info(&udev->dev, "640x480 mode selected\n");
1462                 cam->width = 640;
1463                 cam->height = 480;
1464                 break;
1465         default:
1466                 dev_info(&udev->dev, "320x240 mode selected\n");
1467                 cam->width = 320;
1468                 cam->height = 240;
1469                 break;
1470         }
1471
1472         m0d1[0] = mode;
1473         m1[2].value = 0xf000 + mode;
1474         m2[1].value = 0xf000 + mode;
1475
1476         /* special case for METHOD3, the modes are different */
1477         if (cam->method == METHOD3) {
1478                 switch (mode) {
1479                 case 1:
1480                         m2[1].value = 0xf000 + 4;
1481                         break;
1482                 case 2:
1483                         m2[1].value = 0xf000 + 0;
1484                         break;
1485                 default:
1486                         m2[1].value = 0xf000 + 1;
1487                         break;
1488                 }
1489         }
1490
1491         header2[437] = cam->height / 256;
1492         header2[438] = cam->height % 256;
1493         header2[439] = cam->width / 256;
1494         header2[440] = cam->width % 256;
1495
1496         cam->nb = 0;
1497
1498         DBG("dev: %p, udev %p interface %p\n", cam, cam->udev, intf);
1499
1500         /* set up the endpoint information  */
1501         iface_desc = intf->cur_altsetting;
1502         DBG("num endpoints %d\n", iface_desc->desc.bNumEndpoints);
1503         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1504                 endpoint = &iface_desc->endpoint[i].desc;
1505                 if (!cam->read_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
1506                         /* we found the bulk in endpoint */
1507                         cam->read_endpoint = endpoint->bEndpointAddress;
1508                 }
1509         }
1510
1511         if (!cam->read_endpoint) {
1512                 err = -ENOMEM;
1513                 dev_err(&intf->dev, "Could not find bulk-in endpoint\n");
1514                 goto fail;
1515         }
1516
1517         /* v4l */
1518         INIT_LIST_HEAD(&cam->vidq.active);
1519         cam->vidq.cam = cam;
1520
1521         usb_set_intfdata(intf, cam);
1522
1523         /* load zr364xx board specific */
1524         err = zr364xx_board_init(cam);
1525         if (!err)
1526                 err = v4l2_ctrl_handler_setup(hdl);
1527         if (err)
1528                 goto fail;
1529
1530         spin_lock_init(&cam->slock);
1531
1532         cam->fmt = formats;
1533
1534         videobuf_queue_vmalloc_init(&cam->vb_vidq, &zr364xx_video_qops,
1535                                     NULL, &cam->slock,
1536                                     V4L2_BUF_TYPE_VIDEO_CAPTURE,
1537                                     V4L2_FIELD_NONE,
1538                                     sizeof(struct zr364xx_buffer), cam, &cam->lock);
1539
1540         err = video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1);
1541         if (err) {
1542                 dev_err(&udev->dev, "video_register_device failed\n");
1543                 goto fail;
1544         }
1545
1546         dev_info(&udev->dev, DRIVER_DESC " controlling device %s\n",
1547                  video_device_node_name(&cam->vdev));
1548         return 0;
1549
1550 fail:
1551         v4l2_ctrl_handler_free(hdl);
1552         v4l2_device_unregister(&cam->v4l2_dev);
1553         kfree(cam);
1554         return err;
1555 }
1556
1557
1558 static void zr364xx_disconnect(struct usb_interface *intf)
1559 {
1560         struct zr364xx_camera *cam = usb_get_intfdata(intf);
1561
1562         mutex_lock(&cam->lock);
1563         usb_set_intfdata(intf, NULL);
1564         dev_info(&intf->dev, DRIVER_DESC " webcam unplugged\n");
1565         video_unregister_device(&cam->vdev);
1566         v4l2_device_disconnect(&cam->v4l2_dev);
1567
1568         /* stops the read pipe if it is running */
1569         if (cam->b_acquire)
1570                 zr364xx_stop_acquire(cam);
1571
1572         zr364xx_stop_readpipe(cam);
1573         mutex_unlock(&cam->lock);
1574         v4l2_device_put(&cam->v4l2_dev);
1575 }
1576
1577
1578 #ifdef CONFIG_PM
1579 static int zr364xx_suspend(struct usb_interface *intf, pm_message_t message)
1580 {
1581         struct zr364xx_camera *cam = usb_get_intfdata(intf);
1582
1583         cam->was_streaming = cam->b_acquire;
1584         if (!cam->was_streaming)
1585                 return 0;
1586         zr364xx_stop_acquire(cam);
1587         zr364xx_stop_readpipe(cam);
1588         return 0;
1589 }
1590
1591 static int zr364xx_resume(struct usb_interface *intf)
1592 {
1593         struct zr364xx_camera *cam = usb_get_intfdata(intf);
1594         int res;
1595
1596         if (!cam->was_streaming)
1597                 return 0;
1598
1599         zr364xx_start_readpipe(cam);
1600         res = zr364xx_prepare(cam);
1601         if (!res)
1602                 zr364xx_start_acquire(cam);
1603         return res;
1604 }
1605 #endif
1606
1607 /**********************/
1608 /* Module integration */
1609 /**********************/
1610
1611 static struct usb_driver zr364xx_driver = {
1612         .name = "zr364xx",
1613         .probe = zr364xx_probe,
1614         .disconnect = zr364xx_disconnect,
1615 #ifdef CONFIG_PM
1616         .suspend = zr364xx_suspend,
1617         .resume = zr364xx_resume,
1618         .reset_resume = zr364xx_resume,
1619 #endif
1620         .id_table = device_table
1621 };
1622
1623 module_usb_driver(zr364xx_driver);
1624
1625 MODULE_AUTHOR(DRIVER_AUTHOR);
1626 MODULE_DESCRIPTION(DRIVER_DESC);
1627 MODULE_LICENSE("GPL");
1628 MODULE_VERSION(DRIVER_VERSION);