--- /dev/null
+/*
+ * Zoran 364xx based USB webcam module version 0.73
+ *
+ * Allows you to use your USB webcam with V4L2 applications
+ * This is still in heavy developpement !
+ *
+ * Copyright (C) 2004 Antoine Jacquet <royale@zerezo.com>
+ * http://royale.zerezo.com/zr364xx/
+ *
+ * Heavily inspired by usb-skeleton.c, vicam.c, cpia.c and spca50x.c drivers
+ * V4L2 version inspired by meye.c driver
+ *
+ * Some video buffer code by Lamarque based on s2255drv.c and vivi.c drivers.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/usb.h>
+#include <linux/vmalloc.h>
+#include <linux/slab.h>
+#include <linux/proc_fs.h>
+#include <linux/highmem.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-event.h>
+#include <media/videobuf-vmalloc.h>
+
+
+/* Version Information */
+#define DRIVER_VERSION "0.7.4"
+#define DRIVER_AUTHOR "Antoine Jacquet, http://royale.zerezo.com/"
+#define DRIVER_DESC "Zoran 364xx"
+
+
+/* Camera */
+#define FRAMES 1
+#define MAX_FRAME_SIZE 200000
+#define BUFFER_SIZE 0x1000
+#define CTRL_TIMEOUT 500
+
+#define ZR364XX_DEF_BUFS 4
+#define ZR364XX_READ_IDLE 0
+#define ZR364XX_READ_FRAME 1
+
+/* Debug macro */
+#define DBG(fmt, args...) \
+ do { \
+ if (debug) { \
+ printk(KERN_INFO KBUILD_MODNAME " " fmt, ##args); \
+ } \
+ } while (0)
+
+/*#define FULL_DEBUG 1*/
+#ifdef FULL_DEBUG
+#define _DBG DBG
+#else
+#define _DBG(fmt, args...)
+#endif
+
+/* Init methods, need to find nicer names for these
+ * the exact names of the chipsets would be the best if someone finds it */
+#define METHOD0 0
+#define METHOD1 1
+#define METHOD2 2
+#define METHOD3 3
+
+
+/* Module parameters */
+static int debug;
+static int mode;
+
+
+/* Module parameters interface */
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Debug level");
+module_param(mode, int, 0644);
+MODULE_PARM_DESC(mode, "0 = 320x240, 1 = 160x120, 2 = 640x480");
+
+
+/* Devices supported by this driver
+ * .driver_info contains the init method used by the camera */
+static struct usb_device_id device_table[] = {
+ {USB_DEVICE(0x08ca, 0x0109), .driver_info = METHOD0 },
+ {USB_DEVICE(0x041e, 0x4024), .driver_info = METHOD0 },
+ {USB_DEVICE(0x0d64, 0x0108), .driver_info = METHOD0 },
+ {USB_DEVICE(0x0546, 0x3187), .driver_info = METHOD0 },
+ {USB_DEVICE(0x0d64, 0x3108), .driver_info = METHOD0 },
+ {USB_DEVICE(0x0595, 0x4343), .driver_info = METHOD0 },
+ {USB_DEVICE(0x0bb0, 0x500d), .driver_info = METHOD0 },
+ {USB_DEVICE(0x0feb, 0x2004), .driver_info = METHOD0 },
+ {USB_DEVICE(0x055f, 0xb500), .driver_info = METHOD0 },
+ {USB_DEVICE(0x08ca, 0x2062), .driver_info = METHOD2 },
+ {USB_DEVICE(0x052b, 0x1a18), .driver_info = METHOD1 },
+ {USB_DEVICE(0x04c8, 0x0729), .driver_info = METHOD0 },
+ {USB_DEVICE(0x04f2, 0xa208), .driver_info = METHOD0 },
+ {USB_DEVICE(0x0784, 0x0040), .driver_info = METHOD1 },
+ {USB_DEVICE(0x06d6, 0x0034), .driver_info = METHOD0 },
+ {USB_DEVICE(0x0a17, 0x0062), .driver_info = METHOD2 },
+ {USB_DEVICE(0x06d6, 0x003b), .driver_info = METHOD0 },
+ {USB_DEVICE(0x0a17, 0x004e), .driver_info = METHOD2 },
+ {USB_DEVICE(0x041e, 0x405d), .driver_info = METHOD2 },
+ {USB_DEVICE(0x08ca, 0x2102), .driver_info = METHOD3 },
+ {USB_DEVICE(0x06d6, 0x003d), .driver_info = METHOD0 },
+ {} /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, device_table);
+
+/* frame structure */
+struct zr364xx_framei {
+ unsigned long ulState; /* ulState:ZR364XX_READ_IDLE,
+ ZR364XX_READ_FRAME */
+ void *lpvbits; /* image data */
+ unsigned long cur_size; /* current data copied to it */
+};
+
+/* image buffer structure */
+struct zr364xx_bufferi {
+ unsigned long dwFrames; /* number of frames in buffer */
+ struct zr364xx_framei frame[FRAMES]; /* array of FRAME structures */
+};
+
+struct zr364xx_dmaqueue {
+ struct list_head active;
+ struct zr364xx_camera *cam;
+};
+
+struct zr364xx_pipeinfo {
+ u32 transfer_size;
+ u8 *transfer_buffer;
+ u32 state;
+ void *stream_urb;
+ void *cam; /* back pointer to zr364xx_camera struct */
+ u32 err_count;
+ u32 idx;
+};
+
+struct zr364xx_fmt {
+ char *name;
+ u32 fourcc;
+ int depth;
+};
+
+/* image formats. */
+static const struct zr364xx_fmt formats[] = {
+ {
+ .name = "JPG",
+ .fourcc = V4L2_PIX_FMT_JPEG,
+ .depth = 24
+ }
+};
+
+/* Camera stuff */
+struct zr364xx_camera {
+ struct usb_device *udev; /* save off the usb device pointer */
+ struct usb_interface *interface;/* the interface for this device */
+ struct v4l2_device v4l2_dev;
+ struct v4l2_ctrl_handler ctrl_handler;
+ struct video_device vdev; /* v4l video device */
+ struct v4l2_fh *owner; /* owns the streaming */
+ int nb;
+ struct zr364xx_bufferi buffer;
+ int skip;
+ int width;
+ int height;
+ int method;
+ struct mutex lock;
+
+ spinlock_t slock;
+ struct zr364xx_dmaqueue vidq;
+ int last_frame;
+ int cur_frame;
+ unsigned long frame_count;
+ int b_acquire;
+ struct zr364xx_pipeinfo pipe[1];
+
+ u8 read_endpoint;
+
+ const struct zr364xx_fmt *fmt;
+ struct videobuf_queue vb_vidq;
+ bool was_streaming;
+};
+
+/* buffer for one video frame */
+struct zr364xx_buffer {
+ /* common v4l buffer stuff -- must be first */
+ struct videobuf_buffer vb;
+ const struct zr364xx_fmt *fmt;
+};
+
+/* function used to send initialisation commands to the camera */
+static int send_control_msg(struct usb_device *udev, u8 request, u16 value,
+ u16 index, unsigned char *cp, u16 size)
+{
+ int status;
+
+ unsigned char *transfer_buffer = kmalloc(size, GFP_KERNEL);
+ if (!transfer_buffer) {
+ dev_err(&udev->dev, "kmalloc(%d) failed\n", size);
+ return -ENOMEM;
+ }
+
+ memcpy(transfer_buffer, cp, size);
+
+ status = usb_control_msg(udev,
+ usb_sndctrlpipe(udev, 0),
+ request,
+ USB_DIR_OUT | USB_TYPE_VENDOR |
+ USB_RECIP_DEVICE, value, index,
+ transfer_buffer, size, CTRL_TIMEOUT);
+
+ kfree(transfer_buffer);
+ return status;
+}
+
+
+/* Control messages sent to the camera to initialize it
+ * and launch the capture */
+typedef struct {
+ unsigned int value;
+ unsigned int size;
+ unsigned char *bytes;
+} message;
+
+/* method 0 */
+static unsigned char m0d1[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+static unsigned char m0d2[] = { 0, 0, 0, 0, 0, 0 };
+static unsigned char m0d3[] = { 0, 0 };
+static message m0[] = {
+ {0x1f30, 0, NULL},
+ {0xd000, 0, NULL},
+ {0x3370, sizeof(m0d1), m0d1},
+ {0x2000, 0, NULL},
+ {0x2f0f, 0, NULL},
+ {0x2610, sizeof(m0d2), m0d2},
+ {0xe107, 0, NULL},
+ {0x2502, 0, NULL},
+ {0x1f70, 0, NULL},
+ {0xd000, 0, NULL},
+ {0x9a01, sizeof(m0d3), m0d3},
+ {-1, -1, NULL}
+};
+
+/* method 1 */
+static unsigned char m1d1[] = { 0xff, 0xff };
+static unsigned char m1d2[] = { 0x00, 0x00 };
+static message m1[] = {
+ {0x1f30, 0, NULL},
+ {0xd000, 0, NULL},
+ {0xf000, 0, NULL},
+ {0x2000, 0, NULL},
+ {0x2f0f, 0, NULL},
+ {0x2650, 0, NULL},
+ {0xe107, 0, NULL},
+ {0x2502, sizeof(m1d1), m1d1},
+ {0x1f70, 0, NULL},
+ {0xd000, 0, NULL},
+ {0xd000, 0, NULL},
+ {0xd000, 0, NULL},
+ {0x9a01, sizeof(m1d2), m1d2},
+ {-1, -1, NULL}
+};
+
+/* method 2 */
+static unsigned char m2d1[] = { 0xff, 0xff };
+static message m2[] = {
+ {0x1f30, 0, NULL},
+ {0xf000, 0, NULL},
+ {0x2000, 0, NULL},
+ {0x2f0f, 0, NULL},
+ {0x2650, 0, NULL},
+ {0xe107, 0, NULL},
+ {0x2502, sizeof(m2d1), m2d1},
+ {0x1f70, 0, NULL},
+ {-1, -1, NULL}
+};
+
+/* init table */
+static message *init[4] = { m0, m1, m2, m2 };
+
+
+/* JPEG static data in header (Huffman table, etc) */
+static unsigned char header1[] = {
+ 0xFF, 0xD8,
+ /*
+ 0xFF, 0xE0, 0x00, 0x10, 'J', 'F', 'I', 'F',
+ 0x00, 0x01, 0x01, 0x00, 0x33, 0x8A, 0x00, 0x00, 0x33, 0x88,
+ */
+ 0xFF, 0xDB, 0x00, 0x84
+};
+static unsigned char header2[] = {
+ 0xFF, 0xC4, 0x00, 0x1F, 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01,
+ 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
+ 0xFF, 0xC4, 0x00, 0xB5, 0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02,
+ 0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7D, 0x01,
+ 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06,
+ 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1,
+ 0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, 0x24, 0x33,
+ 0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25,
+ 0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
+ 0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54,
+ 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67,
+ 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A,
+ 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94,
+ 0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6,
+ 0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8,
+ 0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA,
+ 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2,
+ 0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3,
+ 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFF, 0xC4, 0x00, 0x1F,
+ 0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+ 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04,
+ 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0xFF, 0xC4, 0x00, 0xB5,
+ 0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05,
+ 0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11,
+ 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
+ 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1,
+ 0x09, 0x23, 0x33, 0x52, 0xF0, 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16,
+ 0x24, 0x34, 0xE1, 0x25, 0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, 0x27,
+ 0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44,
+ 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57,
+ 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
+ 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x82, 0x83, 0x84,
+ 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96,
+ 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8,
+ 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA,
+ 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3,
+ 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5,
+ 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
+ 0xF8, 0xF9, 0xFA, 0xFF, 0xC0, 0x00, 0x11, 0x08, 0x00, 0xF0, 0x01,
+ 0x40, 0x03, 0x01, 0x21, 0x00, 0x02, 0x11, 0x01, 0x03, 0x11, 0x01,
+ 0xFF, 0xDA, 0x00, 0x0C, 0x03, 0x01, 0x00, 0x02, 0x11, 0x03, 0x11,
+ 0x00, 0x3F, 0x00
+};
+static unsigned char header3;
+
+/* ------------------------------------------------------------------
+ Videobuf operations
+ ------------------------------------------------------------------*/
+
+static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
+ unsigned int *size)
+{
+ struct zr364xx_camera *cam = vq->priv_data;
+
+ *size = cam->width * cam->height * (cam->fmt->depth >> 3);
+
+ if (*count == 0)
+ *count = ZR364XX_DEF_BUFS;
+
+ if (*size * *count > ZR364XX_DEF_BUFS * 1024 * 1024)
+ *count = (ZR364XX_DEF_BUFS * 1024 * 1024) / *size;
+
+ return 0;
+}
+
+static void free_buffer(struct videobuf_queue *vq, struct zr364xx_buffer *buf)
+{
+ _DBG("%s\n", __func__);
+
+ if (in_interrupt())
+ BUG();
+
+ videobuf_vmalloc_free(&buf->vb);
+ buf->vb.state = VIDEOBUF_NEEDS_INIT;
+}
+
+static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
+ enum v4l2_field field)
+{
+ struct zr364xx_camera *cam = vq->priv_data;
+ struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
+ vb);
+ int rc;
+
+ DBG("%s, field=%d, fmt name = %s\n", __func__, field, cam->fmt != NULL ?
+ cam->fmt->name : "");
+ if (cam->fmt == NULL)
+ return -EINVAL;
+
+ buf->vb.size = cam->width * cam->height * (cam->fmt->depth >> 3);
+
+ if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size) {
+ DBG("invalid buffer prepare\n");
+ return -EINVAL;
+ }
+
+ buf->fmt = cam->fmt;
+ buf->vb.width = cam->width;
+ buf->vb.height = cam->height;
+ buf->vb.field = field;
+
+ if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
+ rc = videobuf_iolock(vq, &buf->vb, NULL);
+ if (rc < 0)
+ goto fail;
+ }
+
+ buf->vb.state = VIDEOBUF_PREPARED;
+ return 0;
+fail:
+ free_buffer(vq, buf);
+ return rc;
+}
+
+static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
+{
+ struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
+ vb);
+ struct zr364xx_camera *cam = vq->priv_data;
+
+ _DBG("%s\n", __func__);
+
+ buf->vb.state = VIDEOBUF_QUEUED;
+ list_add_tail(&buf->vb.queue, &cam->vidq.active);
+}
+
+static void buffer_release(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb)
+{
+ struct zr364xx_buffer *buf = container_of(vb, struct zr364xx_buffer,
+ vb);
+
+ _DBG("%s\n", __func__);
+ free_buffer(vq, buf);
+}
+
+static struct videobuf_queue_ops zr364xx_video_qops = {
+ .buf_setup = buffer_setup,
+ .buf_prepare = buffer_prepare,
+ .buf_queue = buffer_queue,
+ .buf_release = buffer_release,
+};
+
+/********************/
+/* V4L2 integration */
+/********************/
+static int zr364xx_vidioc_streamon(struct file *file, void *priv,
+ enum v4l2_buf_type type);
+
+static ssize_t zr364xx_read(struct file *file, char __user *buf, size_t count,
+ loff_t * ppos)
+{
+ struct zr364xx_camera *cam = video_drvdata(file);
+ int err = 0;
+
+ _DBG("%s\n", __func__);
+
+ if (!buf)
+ return -EINVAL;
+
+ if (!count)
+ return -EINVAL;
+
+ if (mutex_lock_interruptible(&cam->lock))
+ return -ERESTARTSYS;
+
+ err = zr364xx_vidioc_streamon(file, file->private_data,
+ V4L2_BUF_TYPE_VIDEO_CAPTURE);
+ if (err == 0) {
+ DBG("%s: reading %d bytes at pos %d.\n", __func__,
+ (int) count, (int) *ppos);
+
+ /* NoMan Sux ! */
+ err = videobuf_read_one(&cam->vb_vidq, buf, count, ppos,
+ file->f_flags & O_NONBLOCK);
+ }
+ mutex_unlock(&cam->lock);
+ return err;
+}
+
+/* video buffer vmalloc implementation based partly on VIVI driver which is
+ * Copyright (c) 2006 by
+ * Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
+ * Ted Walther <ted--a.t--enumera.com>
+ * John Sokol <sokol--a.t--videotechnology.com>
+ * http://v4l.videotechnology.com/
+ *
+ */
+static void zr364xx_fillbuff(struct zr364xx_camera *cam,
+ struct zr364xx_buffer *buf,
+ int jpgsize)
+{
+ int pos = 0;
+ const char *tmpbuf;
+ char *vbuf = videobuf_to_vmalloc(&buf->vb);
+ unsigned long last_frame;
+
+ if (!vbuf)
+ return;
+
+ last_frame = cam->last_frame;
+ if (last_frame != -1) {
+ tmpbuf = (const char *)cam->buffer.frame[last_frame].lpvbits;
+ switch (buf->fmt->fourcc) {
+ case V4L2_PIX_FMT_JPEG:
+ buf->vb.size = jpgsize;
+ memcpy(vbuf, tmpbuf, buf->vb.size);
+ break;
+ default:
+ printk(KERN_DEBUG KBUILD_MODNAME ": unknown format?\n");
+ }
+ cam->last_frame = -1;
+ } else {
+ printk(KERN_ERR KBUILD_MODNAME ": =======no frame\n");
+ return;
+ }
+ DBG("%s: Buffer 0x%08lx size= %d\n", __func__,
+ (unsigned long)vbuf, pos);
+ /* tell v4l buffer was filled */
+
+ buf->vb.field_count = cam->frame_count * 2;
+ v4l2_get_timestamp(&buf->vb.ts);
+ buf->vb.state = VIDEOBUF_DONE;
+}
+
+static int zr364xx_got_frame(struct zr364xx_camera *cam, int jpgsize)
+{
+ struct zr364xx_dmaqueue *dma_q = &cam->vidq;
+ struct zr364xx_buffer *buf;
+ unsigned long flags = 0;
+ int rc = 0;
+
+ DBG("wakeup: %p\n", &dma_q);
+ spin_lock_irqsave(&cam->slock, flags);
+
+ if (list_empty(&dma_q->active)) {
+ DBG("No active queue to serve\n");
+ rc = -1;
+ goto unlock;
+ }
+ buf = list_entry(dma_q->active.next,
+ struct zr364xx_buffer, vb.queue);
+
+ if (!waitqueue_active(&buf->vb.done)) {
+ /* no one active */
+ rc = -1;
+ goto unlock;
+ }
+ list_del(&buf->vb.queue);
+ v4l2_get_timestamp(&buf->vb.ts);
+ DBG("[%p/%d] wakeup\n", buf, buf->vb.i);
+ zr364xx_fillbuff(cam, buf, jpgsize);
+ wake_up(&buf->vb.done);
+ DBG("wakeup [buf/i] [%p/%d]\n", buf, buf->vb.i);
+unlock:
+ spin_unlock_irqrestore(&cam->slock, flags);
+ return rc;
+}
+
+/* this function moves the usb stream read pipe data
+ * into the system buffers.
+ * returns 0 on success, EAGAIN if more data to process (call this
+ * function again).
+ */
+static int zr364xx_read_video_callback(struct zr364xx_camera *cam,
+ struct zr364xx_pipeinfo *pipe_info,
+ struct urb *purb)
+{
+ unsigned char *pdest;
+ unsigned char *psrc;
+ s32 idx = -1;
+ struct zr364xx_framei *frm;
+ int i = 0;
+ unsigned char *ptr = NULL;
+
+ _DBG("buffer to user\n");
+ idx = cam->cur_frame;
+ frm = &cam->buffer.frame[idx];
+
+ /* swap bytes if camera needs it */
+ if (cam->method == METHOD0) {
+ u16 *buf = (u16 *)pipe_info->transfer_buffer;
+ for (i = 0; i < purb->actual_length/2; i++)
+ swab16s(buf + i);
+ }
+
+ /* search done. now find out if should be acquiring */
+ if (!cam->b_acquire) {
+ /* we found a frame, but this channel is turned off */
+ frm->ulState = ZR364XX_READ_IDLE;
+ return -EINVAL;
+ }
+
+ psrc = (u8 *)pipe_info->transfer_buffer;
+ ptr = pdest = frm->lpvbits;
+
+ if (frm->ulState == ZR364XX_READ_IDLE) {
+ frm->ulState = ZR364XX_READ_FRAME;
+ frm->cur_size = 0;
+
+ _DBG("jpeg header, ");
+ memcpy(ptr, header1, sizeof(header1));
+ ptr += sizeof(header1);
+ header3 = 0;
+ memcpy(ptr, &header3, 1);
+ ptr++;
+ memcpy(ptr, psrc, 64);
+ ptr += 64;
+ header3 = 1;
+ memcpy(ptr, &header3, 1);
+ ptr++;
+ memcpy(ptr, psrc + 64, 64);
+ ptr += 64;
+ memcpy(ptr, header2, sizeof(header2));
+ ptr += sizeof(header2);
+ memcpy(ptr, psrc + 128,
+ purb->actual_length - 128);
+ ptr += purb->actual_length - 128;
+ _DBG("header : %d %d %d %d %d %d %d %d %d\n",
+ psrc[0], psrc[1], psrc[2],
+ psrc[3], psrc[4], psrc[5],
+ psrc[6], psrc[7], psrc[8]);
+ frm->cur_size = ptr - pdest;
+ } else {
+ if (frm->cur_size + purb->actual_length > MAX_FRAME_SIZE) {
+ dev_info(&cam->udev->dev,
+ "%s: buffer (%d bytes) too small to hold "
+ "frame data. Discarding frame data.\n",
+ __func__, MAX_FRAME_SIZE);
+ } else {
+ pdest += frm->cur_size;
+ memcpy(pdest, psrc, purb->actual_length);
+ frm->cur_size += purb->actual_length;
+ }
+ }
+ /*_DBG("cur_size %lu urb size %d\n", frm->cur_size,
+ purb->actual_length);*/
+
+ if (purb->actual_length < pipe_info->transfer_size) {
+ _DBG("****************Buffer[%d]full*************\n", idx);
+ cam->last_frame = cam->cur_frame;
+ cam->cur_frame++;
+ /* end of system frame ring buffer, start at zero */
+ if (cam->cur_frame == cam->buffer.dwFrames)
+ cam->cur_frame = 0;
+
+ /* frame ready */
+ /* go back to find the JPEG EOI marker */
+ ptr = pdest = frm->lpvbits;
+ ptr += frm->cur_size - 2;
+ while (ptr > pdest) {
+ if (*ptr == 0xFF && *(ptr + 1) == 0xD9
+ && *(ptr + 2) == 0xFF)
+ break;
+ ptr--;
+ }
+ if (ptr == pdest)
+ DBG("No EOI marker\n");
+
+ /* Sometimes there is junk data in the middle of the picture,
+ * we want to skip this bogus frames */
+ while (ptr > pdest) {
+ if (*ptr == 0xFF && *(ptr + 1) == 0xFF
+ && *(ptr + 2) == 0xFF)
+ break;
+ ptr--;
+ }
+ if (ptr != pdest) {
+ DBG("Bogus frame ? %d\n", ++(cam->nb));
+ } else if (cam->b_acquire) {
+ /* we skip the 2 first frames which are usually buggy */
+ if (cam->skip)
+ cam->skip--;
+ else {
+ _DBG("jpeg(%lu): %d %d %d %d %d %d %d %d\n",
+ frm->cur_size,
+ pdest[0], pdest[1], pdest[2], pdest[3],
+ pdest[4], pdest[5], pdest[6], pdest[7]);
+
+ zr364xx_got_frame(cam, frm->cur_size);
+ }
+ }
+ cam->frame_count++;
+ frm->ulState = ZR364XX_READ_IDLE;
+ frm->cur_size = 0;
+ }
+ /* done successfully */
+ return 0;
+}
+
+static int zr364xx_vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct zr364xx_camera *cam = video_drvdata(file);
+
+ strlcpy(cap->driver, DRIVER_DESC, sizeof(cap->driver));
+ strlcpy(cap->card, cam->udev->product, sizeof(cap->card));
+ strlcpy(cap->bus_info, dev_name(&cam->udev->dev),
+ sizeof(cap->bus_info));
+ cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
+ V4L2_CAP_READWRITE |
+ V4L2_CAP_STREAMING;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+
+ return 0;
+}
+
+static int zr364xx_vidioc_enum_input(struct file *file, void *priv,
+ struct v4l2_input *i)
+{
+ if (i->index != 0)
+ return -EINVAL;
+ strcpy(i->name, DRIVER_DESC " Camera");
+ i->type = V4L2_INPUT_TYPE_CAMERA;
+ return 0;
+}
+
+static int zr364xx_vidioc_g_input(struct file *file, void *priv,
+ unsigned int *i)
+{
+ *i = 0;
+ return 0;
+}
+
+static int zr364xx_vidioc_s_input(struct file *file, void *priv,
+ unsigned int i)
+{
+ if (i != 0)
+ return -EINVAL;
+ return 0;
+}
+
+static int zr364xx_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct zr364xx_camera *cam =
+ container_of(ctrl->handler, struct zr364xx_camera, ctrl_handler);
+ int temp;
+
+ switch (ctrl->id) {
+ case V4L2_CID_BRIGHTNESS:
+ /* hardware brightness */
+ send_control_msg(cam->udev, 1, 0x2001, 0, NULL, 0);
+ temp = (0x60 << 8) + 127 - ctrl->val;
+ send_control_msg(cam->udev, 1, temp, 0, NULL, 0);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int zr364xx_vidioc_enum_fmt_vid_cap(struct file *file,
+ void *priv, struct v4l2_fmtdesc *f)
+{
+ if (f->index > 0)
+ return -EINVAL;
+ f->flags = V4L2_FMT_FLAG_COMPRESSED;
+ strcpy(f->description, formats[0].name);
+ f->pixelformat = formats[0].fourcc;
+ return 0;
+}
+
+static char *decode_fourcc(__u32 pixelformat, char *buf)
+{
+ buf[0] = pixelformat & 0xff;
+ buf[1] = (pixelformat >> 8) & 0xff;
+ buf[2] = (pixelformat >> 16) & 0xff;
+ buf[3] = (pixelformat >> 24) & 0xff;
+ buf[4] = '\0';
+ return buf;
+}
+
+static int zr364xx_vidioc_try_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct zr364xx_camera *cam = video_drvdata(file);
+ char pixelformat_name[5];
+
+ if (cam == NULL)
+ return -ENODEV;
+
+ if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG) {
+ DBG("%s: unsupported pixelformat V4L2_PIX_FMT_%s\n", __func__,
+ decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name));
+ return -EINVAL;
+ }
+
+ if (!(f->fmt.pix.width == 160 && f->fmt.pix.height == 120) &&
+ !(f->fmt.pix.width == 640 && f->fmt.pix.height == 480)) {
+ f->fmt.pix.width = 320;
+ f->fmt.pix.height = 240;
+ }
+
+ f->fmt.pix.field = V4L2_FIELD_NONE;
+ f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
+ f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
+ f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
+ DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
+ decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
+ f->fmt.pix.field);
+ return 0;
+}
+
+static int zr364xx_vidioc_g_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct zr364xx_camera *cam;
+
+ if (file == NULL)
+ return -ENODEV;
+ cam = video_drvdata(file);
+
+ f->fmt.pix.pixelformat = formats[0].fourcc;
+ f->fmt.pix.field = V4L2_FIELD_NONE;
+ f->fmt.pix.width = cam->width;
+ f->fmt.pix.height = cam->height;
+ f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
+ f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
+ f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
+ return 0;
+}
+
+static int zr364xx_vidioc_s_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct zr364xx_camera *cam = video_drvdata(file);
+ struct videobuf_queue *q = &cam->vb_vidq;
+ char pixelformat_name[5];
+ int ret = zr364xx_vidioc_try_fmt_vid_cap(file, cam, f);
+ int i;
+
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&q->vb_lock);
+
+ if (videobuf_queue_is_busy(&cam->vb_vidq)) {
+ DBG("%s queue busy\n", __func__);
+ ret = -EBUSY;
+ goto out;
+ }
+
+ if (cam->owner) {
+ DBG("%s can't change format after started\n", __func__);
+ ret = -EBUSY;
+ goto out;
+ }
+
+ cam->width = f->fmt.pix.width;
+ cam->height = f->fmt.pix.height;
+ DBG("%s: %dx%d mode selected\n", __func__,
+ cam->width, cam->height);
+ f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
+ f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
+ f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
+ cam->vb_vidq.field = f->fmt.pix.field;
+
+ if (f->fmt.pix.width == 160 && f->fmt.pix.height == 120)
+ mode = 1;
+ else if (f->fmt.pix.width == 640 && f->fmt.pix.height == 480)
+ mode = 2;
+ else
+ mode = 0;
+
+ m0d1[0] = mode;
+ m1[2].value = 0xf000 + mode;
+ m2[1].value = 0xf000 + mode;
+
+ /* special case for METHOD3, the modes are different */
+ if (cam->method == METHOD3) {
+ switch (mode) {
+ case 1:
+ m2[1].value = 0xf000 + 4;
+ break;
+ case 2:
+ m2[1].value = 0xf000 + 0;
+ break;
+ default:
+ m2[1].value = 0xf000 + 1;
+ break;
+ }
+ }
+
+ header2[437] = cam->height / 256;
+ header2[438] = cam->height % 256;
+ header2[439] = cam->width / 256;
+ header2[440] = cam->width % 256;
+
+ for (i = 0; init[cam->method][i].size != -1; i++) {
+ ret =
+ send_control_msg(cam->udev, 1, init[cam->method][i].value,
+ 0, init[cam->method][i].bytes,
+ init[cam->method][i].size);
+ if (ret < 0) {
+ dev_err(&cam->udev->dev,
+ "error during resolution change sequence: %d\n", i);
+ goto out;
+ }
+ }
+
+ /* Added some delay here, since opening/closing the camera quickly,
+ * like Ekiga does during its startup, can crash the webcam
+ */
+ mdelay(100);
+ cam->skip = 2;
+ ret = 0;
+
+out:
+ mutex_unlock(&q->vb_lock);
+
+ DBG("%s: V4L2_PIX_FMT_%s (%d) ok!\n", __func__,
+ decode_fourcc(f->fmt.pix.pixelformat, pixelformat_name),
+ f->fmt.pix.field);
+ return ret;
+}
+
+static int zr364xx_vidioc_reqbufs(struct file *file, void *priv,
+ struct v4l2_requestbuffers *p)
+{
+ struct zr364xx_camera *cam = video_drvdata(file);
+
+ if (cam->owner && cam->owner != priv)
+ return -EBUSY;
+ return videobuf_reqbufs(&cam->vb_vidq, p);
+}
+
+static int zr364xx_vidioc_querybuf(struct file *file,
+ void *priv,
+ struct v4l2_buffer *p)
+{
+ int rc;
+ struct zr364xx_camera *cam = video_drvdata(file);
+ rc = videobuf_querybuf(&cam->vb_vidq, p);
+ return rc;
+}
+
+static int zr364xx_vidioc_qbuf(struct file *file,
+ void *priv,
+ struct v4l2_buffer *p)
+{
+ int rc;
+ struct zr364xx_camera *cam = video_drvdata(file);
+ _DBG("%s\n", __func__);
+ if (cam->owner && cam->owner != priv)
+ return -EBUSY;
+ rc = videobuf_qbuf(&cam->vb_vidq, p);
+ return rc;
+}
+
+static int zr364xx_vidioc_dqbuf(struct file *file,
+ void *priv,
+ struct v4l2_buffer *p)
+{
+ int rc;
+ struct zr364xx_camera *cam = video_drvdata(file);
+ _DBG("%s\n", __func__);
+ if (cam->owner && cam->owner != priv)
+ return -EBUSY;
+ rc = videobuf_dqbuf(&cam->vb_vidq, p, file->f_flags & O_NONBLOCK);
+ return rc;
+}
+
+static void read_pipe_completion(struct urb *purb)
+{
+ struct zr364xx_pipeinfo *pipe_info;
+ struct zr364xx_camera *cam;
+ int pipe;
+
+ pipe_info = purb->context;
+ _DBG("%s %p, status %d\n", __func__, purb, purb->status);
+ if (pipe_info == NULL) {
+ printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
+ return;
+ }
+
+ cam = pipe_info->cam;
+ if (cam == NULL) {
+ printk(KERN_ERR KBUILD_MODNAME ": no context!\n");
+ return;
+ }
+
+ /* if shutting down, do not resubmit, exit immediately */
+ if (purb->status == -ESHUTDOWN) {
+ DBG("%s, err shutdown\n", __func__);
+ pipe_info->err_count++;
+ return;
+ }
+
+ if (pipe_info->state == 0) {
+ DBG("exiting USB pipe\n");
+ return;
+ }
+
+ if (purb->actual_length > pipe_info->transfer_size) {
+ dev_err(&cam->udev->dev, "wrong number of bytes\n");
+ return;
+ }
+
+ if (purb->status == 0)
+ zr364xx_read_video_callback(cam, pipe_info, purb);
+ else {
+ pipe_info->err_count++;
+ DBG("%s: failed URB %d\n", __func__, purb->status);
+ }
+
+ pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
+
+ /* reuse urb */
+ usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
+ pipe,
+ pipe_info->transfer_buffer,
+ pipe_info->transfer_size,
+ read_pipe_completion, pipe_info);
+
+ if (pipe_info->state != 0) {
+ purb->status = usb_submit_urb(pipe_info->stream_urb,
+ GFP_ATOMIC);
+
+ if (purb->status)
+ dev_err(&cam->udev->dev,
+ "error submitting urb (error=%i)\n",
+ purb->status);
+ } else
+ DBG("read pipe complete state 0\n");
+}
+
+static int zr364xx_start_readpipe(struct zr364xx_camera *cam)
+{
+ int pipe;
+ int retval;
+ struct zr364xx_pipeinfo *pipe_info = cam->pipe;
+ pipe = usb_rcvbulkpipe(cam->udev, cam->read_endpoint);
+ DBG("%s: start pipe IN x%x\n", __func__, cam->read_endpoint);
+
+ pipe_info->state = 1;
+ pipe_info->err_count = 0;
+ pipe_info->stream_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!pipe_info->stream_urb) {
+ dev_err(&cam->udev->dev, "ReadStream: Unable to alloc URB\n");
+ return -ENOMEM;
+ }
+ /* transfer buffer allocated in board_init */
+ usb_fill_bulk_urb(pipe_info->stream_urb, cam->udev,
+ pipe,
+ pipe_info->transfer_buffer,
+ pipe_info->transfer_size,
+ read_pipe_completion, pipe_info);
+
+ DBG("submitting URB %p\n", pipe_info->stream_urb);
+ retval = usb_submit_urb(pipe_info->stream_urb, GFP_KERNEL);
+ if (retval) {
+ printk(KERN_ERR KBUILD_MODNAME ": start read pipe failed\n");
+ return retval;
+ }
+
+ return 0;
+}
+
+static void zr364xx_stop_readpipe(struct zr364xx_camera *cam)
+{
+ struct zr364xx_pipeinfo *pipe_info;
+
+ if (cam == NULL) {
+ printk(KERN_ERR KBUILD_MODNAME ": invalid device\n");
+ return;
+ }
+ DBG("stop read pipe\n");
+ pipe_info = cam->pipe;
+ if (pipe_info) {
+ if (pipe_info->state != 0)
+ pipe_info->state = 0;
+
+ if (pipe_info->stream_urb) {
+ /* cancel urb */
+ usb_kill_urb(pipe_info->stream_urb);
+ usb_free_urb(pipe_info->stream_urb);
+ pipe_info->stream_urb = NULL;
+ }
+ }
+ return;
+}
+
+/* starts acquisition process */
+static int zr364xx_start_acquire(struct zr364xx_camera *cam)
+{
+ int j;
+
+ DBG("start acquire\n");
+
+ cam->last_frame = -1;
+ cam->cur_frame = 0;
+ for (j = 0; j < FRAMES; j++) {
+ cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
+ cam->buffer.frame[j].cur_size = 0;
+ }
+ cam->b_acquire = 1;
+ return 0;
+}
+
+static inline int zr364xx_stop_acquire(struct zr364xx_camera *cam)
+{
+ cam->b_acquire = 0;
+ return 0;
+}
+
+static int zr364xx_prepare(struct zr364xx_camera *cam)
+{
+ int res;
+ int i, j;
+
+ for (i = 0; init[cam->method][i].size != -1; i++) {
+ res = send_control_msg(cam->udev, 1, init[cam->method][i].value,
+ 0, init[cam->method][i].bytes,
+ init[cam->method][i].size);
+ if (res < 0) {
+ dev_err(&cam->udev->dev,
+ "error during open sequence: %d\n", i);
+ return res;
+ }
+ }
+
+ cam->skip = 2;
+ cam->last_frame = -1;
+ cam->cur_frame = 0;
+ cam->frame_count = 0;
+ for (j = 0; j < FRAMES; j++) {
+ cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;
+ cam->buffer.frame[j].cur_size = 0;
+ }
+ v4l2_ctrl_handler_setup(&cam->ctrl_handler);
+ return 0;
+}
+
+static int zr364xx_vidioc_streamon(struct file *file, void *priv,
+ enum v4l2_buf_type type)
+{
+ struct zr364xx_camera *cam = video_drvdata(file);
+ int res;
+
+ DBG("%s\n", __func__);
+
+ if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ if (cam->owner && cam->owner != priv)
+ return -EBUSY;
+
+ res = zr364xx_prepare(cam);
+ if (res)
+ return res;
+ res = videobuf_streamon(&cam->vb_vidq);
+ if (res == 0) {
+ zr364xx_start_acquire(cam);
+ cam->owner = file->private_data;
+ }
+ return res;
+}
+
+static int zr364xx_vidioc_streamoff(struct file *file, void *priv,
+ enum v4l2_buf_type type)
+{
+ struct zr364xx_camera *cam = video_drvdata(file);
+
+ DBG("%s\n", __func__);
+ if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ if (cam->owner && cam->owner != priv)
+ return -EBUSY;
+ zr364xx_stop_acquire(cam);
+ return videobuf_streamoff(&cam->vb_vidq);
+}
+
+
+/* open the camera */
+static int zr364xx_open(struct file *file)
+{
+ struct zr364xx_camera *cam = video_drvdata(file);
+ int err;
+
+ DBG("%s\n", __func__);
+
+ if (mutex_lock_interruptible(&cam->lock))
+ return -ERESTARTSYS;
+
+ err = v4l2_fh_open(file);
+ if (err)
+ goto out;
+
+ /* Added some delay here, since opening/closing the camera quickly,
+ * like Ekiga does during its startup, can crash the webcam
+ */
+ mdelay(100);
+ err = 0;
+
+out:
+ mutex_unlock(&cam->lock);
+ DBG("%s: %d\n", __func__, err);
+ return err;
+}
+
+static void zr364xx_release(struct v4l2_device *v4l2_dev)
+{
+ struct zr364xx_camera *cam =
+ container_of(v4l2_dev, struct zr364xx_camera, v4l2_dev);
+ unsigned long i;
+
+ v4l2_device_unregister(&cam->v4l2_dev);
+
+ videobuf_mmap_free(&cam->vb_vidq);
+
+ /* release sys buffers */
+ for (i = 0; i < FRAMES; i++) {
+ if (cam->buffer.frame[i].lpvbits) {
+ DBG("vfree %p\n", cam->buffer.frame[i].lpvbits);
+ vfree(cam->buffer.frame[i].lpvbits);
+ }
+ cam->buffer.frame[i].lpvbits = NULL;
+ }
+
+ v4l2_ctrl_handler_free(&cam->ctrl_handler);
+ /* release transfer buffer */
+ kfree(cam->pipe->transfer_buffer);
+ kfree(cam);
+}
+
+/* release the camera */
+static int zr364xx_close(struct file *file)
+{
+ struct zr364xx_camera *cam;
+ struct usb_device *udev;
+ int i;
+
+ DBG("%s\n", __func__);
+ cam = video_drvdata(file);
+
+ mutex_lock(&cam->lock);
+ udev = cam->udev;
+
+ if (file->private_data == cam->owner) {
+ /* turn off stream */
+ if (cam->b_acquire)
+ zr364xx_stop_acquire(cam);
+ videobuf_streamoff(&cam->vb_vidq);
+
+ for (i = 0; i < 2; i++) {
+ send_control_msg(udev, 1, init[cam->method][i].value,
+ 0, init[cam->method][i].bytes,
+ init[cam->method][i].size);
+ }
+ cam->owner = NULL;
+ }
+
+ /* Added some delay here, since opening/closing the camera quickly,
+ * like Ekiga does during its startup, can crash the webcam
+ */
+ mdelay(100);
+ mutex_unlock(&cam->lock);
+ return v4l2_fh_release(file);
+}
+
+
+static int zr364xx_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct zr364xx_camera *cam = video_drvdata(file);
+ int ret;
+
+ if (cam == NULL) {
+ DBG("%s: cam == NULL\n", __func__);
+ return -ENODEV;
+ }
+ DBG("mmap called, vma=0x%08lx\n", (unsigned long)vma);
+
+ ret = videobuf_mmap_mapper(&cam->vb_vidq, vma);
+
+ DBG("vma start=0x%08lx, size=%ld, ret=%d\n",
+ (unsigned long)vma->vm_start,
+ (unsigned long)vma->vm_end - (unsigned long)vma->vm_start, ret);
+ return ret;
+}
+
+static unsigned int zr364xx_poll(struct file *file,
+ struct poll_table_struct *wait)
+{
+ struct zr364xx_camera *cam = video_drvdata(file);
+ struct videobuf_queue *q = &cam->vb_vidq;
+ unsigned res = v4l2_ctrl_poll(file, wait);
+
+ _DBG("%s\n", __func__);
+
+ return res | videobuf_poll_stream(file, q, wait);
+}
+
+static const struct v4l2_ctrl_ops zr364xx_ctrl_ops = {
+ .s_ctrl = zr364xx_s_ctrl,
+};
+
+static const struct v4l2_file_operations zr364xx_fops = {
+ .owner = THIS_MODULE,
+ .open = zr364xx_open,
+ .release = zr364xx_close,
+ .read = zr364xx_read,
+ .mmap = zr364xx_mmap,
+ .unlocked_ioctl = video_ioctl2,
+ .poll = zr364xx_poll,
+};
+
+static const struct v4l2_ioctl_ops zr364xx_ioctl_ops = {
+ .vidioc_querycap = zr364xx_vidioc_querycap,
+ .vidioc_enum_fmt_vid_cap = zr364xx_vidioc_enum_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = zr364xx_vidioc_try_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = zr364xx_vidioc_s_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = zr364xx_vidioc_g_fmt_vid_cap,
+ .vidioc_enum_input = zr364xx_vidioc_enum_input,
+ .vidioc_g_input = zr364xx_vidioc_g_input,
+ .vidioc_s_input = zr364xx_vidioc_s_input,
+ .vidioc_streamon = zr364xx_vidioc_streamon,
+ .vidioc_streamoff = zr364xx_vidioc_streamoff,
+ .vidioc_reqbufs = zr364xx_vidioc_reqbufs,
+ .vidioc_querybuf = zr364xx_vidioc_querybuf,
+ .vidioc_qbuf = zr364xx_vidioc_qbuf,
+ .vidioc_dqbuf = zr364xx_vidioc_dqbuf,
+ .vidioc_log_status = v4l2_ctrl_log_status,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static struct video_device zr364xx_template = {
+ .name = DRIVER_DESC,
+ .fops = &zr364xx_fops,
+ .ioctl_ops = &zr364xx_ioctl_ops,
+ .release = video_device_release_empty,
+};
+
+
+
+/*******************/
+/* USB integration */
+/*******************/
+static int zr364xx_board_init(struct zr364xx_camera *cam)
+{
+ struct zr364xx_pipeinfo *pipe = cam->pipe;
+ unsigned long i;
+
+ DBG("board init: %p\n", cam);
+ memset(pipe, 0, sizeof(*pipe));
+ pipe->cam = cam;
+ pipe->transfer_size = BUFFER_SIZE;
+
+ pipe->transfer_buffer = kzalloc(pipe->transfer_size,
+ GFP_KERNEL);
+ if (pipe->transfer_buffer == NULL) {
+ DBG("out of memory!\n");
+ return -ENOMEM;
+ }
+
+ cam->b_acquire = 0;
+ cam->frame_count = 0;
+
+ /*** start create system buffers ***/
+ for (i = 0; i < FRAMES; i++) {
+ /* always allocate maximum size for system buffers */
+ cam->buffer.frame[i].lpvbits = vmalloc(MAX_FRAME_SIZE);
+
+ DBG("valloc %p, idx %lu, pdata %p\n",
+ &cam->buffer.frame[i], i,
+ cam->buffer.frame[i].lpvbits);
+ if (cam->buffer.frame[i].lpvbits == NULL) {
+ printk(KERN_INFO KBUILD_MODNAME ": out of memory. "
+ "Using less frames\n");
+ break;
+ }
+ }
+
+ if (i == 0) {
+ printk(KERN_INFO KBUILD_MODNAME ": out of memory. Aborting\n");
+ kfree(cam->pipe->transfer_buffer);
+ cam->pipe->transfer_buffer = NULL;
+ return -ENOMEM;
+ } else
+ cam->buffer.dwFrames = i;
+
+ /* make sure internal states are set */
+ for (i = 0; i < FRAMES; i++) {
+ cam->buffer.frame[i].ulState = ZR364XX_READ_IDLE;
+ cam->buffer.frame[i].cur_size = 0;
+ }
+
+ cam->cur_frame = 0;
+ cam->last_frame = -1;
+ /*** end create system buffers ***/
+
+ /* start read pipe */
+ zr364xx_start_readpipe(cam);
+ DBG(": board initialized\n");
+ return 0;
+}
+
+static int zr364xx_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ struct zr364xx_camera *cam = NULL;
+ struct usb_host_interface *iface_desc;
+ struct usb_endpoint_descriptor *endpoint;
+ struct v4l2_ctrl_handler *hdl;
+ int err;
+ int i;
+
+ DBG("probing...\n");
+
+ dev_info(&intf->dev, DRIVER_DESC " compatible webcam plugged\n");
+ dev_info(&intf->dev, "model %04x:%04x detected\n",
+ le16_to_cpu(udev->descriptor.idVendor),
+ le16_to_cpu(udev->descriptor.idProduct));
+
+ cam = kzalloc(sizeof(struct zr364xx_camera), GFP_KERNEL);
+ if (cam == NULL) {
+ dev_err(&udev->dev, "cam: out of memory !\n");
+ return -ENOMEM;
+ }
+
+ cam->v4l2_dev.release = zr364xx_release;
+ err = v4l2_device_register(&intf->dev, &cam->v4l2_dev);
+ if (err < 0) {
+ dev_err(&udev->dev, "couldn't register v4l2_device\n");
+ kfree(cam);
+ return err;
+ }
+ hdl = &cam->ctrl_handler;
+ v4l2_ctrl_handler_init(hdl, 1);
+ v4l2_ctrl_new_std(hdl, &zr364xx_ctrl_ops,
+ V4L2_CID_BRIGHTNESS, 0, 127, 1, 64);
+ if (hdl->error) {
+ err = hdl->error;
+ dev_err(&udev->dev, "couldn't register control\n");
+ goto fail;
+ }
+ /* save the init method used by this camera */
+ cam->method = id->driver_info;
+ mutex_init(&cam->lock);
+ cam->vdev = zr364xx_template;
+ cam->vdev.lock = &cam->lock;
+ cam->vdev.v4l2_dev = &cam->v4l2_dev;
+ cam->vdev.ctrl_handler = &cam->ctrl_handler;
+ video_set_drvdata(&cam->vdev, cam);
+
+ cam->udev = udev;
+
+ switch (mode) {
+ case 1:
+ dev_info(&udev->dev, "160x120 mode selected\n");
+ cam->width = 160;
+ cam->height = 120;
+ break;
+ case 2:
+ dev_info(&udev->dev, "640x480 mode selected\n");
+ cam->width = 640;
+ cam->height = 480;
+ break;
+ default:
+ dev_info(&udev->dev, "320x240 mode selected\n");
+ cam->width = 320;
+ cam->height = 240;
+ break;
+ }
+
+ m0d1[0] = mode;
+ m1[2].value = 0xf000 + mode;
+ m2[1].value = 0xf000 + mode;
+
+ /* special case for METHOD3, the modes are different */
+ if (cam->method == METHOD3) {
+ switch (mode) {
+ case 1:
+ m2[1].value = 0xf000 + 4;
+ break;
+ case 2:
+ m2[1].value = 0xf000 + 0;
+ break;
+ default:
+ m2[1].value = 0xf000 + 1;
+ break;
+ }
+ }
+
+ header2[437] = cam->height / 256;
+ header2[438] = cam->height % 256;
+ header2[439] = cam->width / 256;
+ header2[440] = cam->width % 256;
+
+ cam->nb = 0;
+
+ DBG("dev: %p, udev %p interface %p\n", cam, cam->udev, intf);
+
+ /* set up the endpoint information */
+ iface_desc = intf->cur_altsetting;
+ DBG("num endpoints %d\n", iface_desc->desc.bNumEndpoints);
+ for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
+ endpoint = &iface_desc->endpoint[i].desc;
+ if (!cam->read_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
+ /* we found the bulk in endpoint */
+ cam->read_endpoint = endpoint->bEndpointAddress;
+ }
+ }
+
+ if (!cam->read_endpoint) {
+ err = -ENOMEM;
+ dev_err(&intf->dev, "Could not find bulk-in endpoint\n");
+ goto fail;
+ }
+
+ /* v4l */
+ INIT_LIST_HEAD(&cam->vidq.active);
+ cam->vidq.cam = cam;
+
+ usb_set_intfdata(intf, cam);
+
+ /* load zr364xx board specific */
+ err = zr364xx_board_init(cam);
+ if (!err)
+ err = v4l2_ctrl_handler_setup(hdl);
+ if (err)
+ goto fail;
+
+ spin_lock_init(&cam->slock);
+
+ cam->fmt = formats;
+
+ videobuf_queue_vmalloc_init(&cam->vb_vidq, &zr364xx_video_qops,
+ NULL, &cam->slock,
+ V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ V4L2_FIELD_NONE,
+ sizeof(struct zr364xx_buffer), cam, &cam->lock);
+
+ err = video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1);
+ if (err) {
+ dev_err(&udev->dev, "video_register_device failed\n");
+ goto fail;
+ }
+
+ dev_info(&udev->dev, DRIVER_DESC " controlling device %s\n",
+ video_device_node_name(&cam->vdev));
+ return 0;
+
+fail:
+ v4l2_ctrl_handler_free(hdl);
+ v4l2_device_unregister(&cam->v4l2_dev);
+ kfree(cam);
+ return err;
+}
+
+
+static void zr364xx_disconnect(struct usb_interface *intf)
+{
+ struct zr364xx_camera *cam = usb_get_intfdata(intf);
+
+ mutex_lock(&cam->lock);
+ usb_set_intfdata(intf, NULL);
+ dev_info(&intf->dev, DRIVER_DESC " webcam unplugged\n");
+ video_unregister_device(&cam->vdev);
+ v4l2_device_disconnect(&cam->v4l2_dev);
+
+ /* stops the read pipe if it is running */
+ if (cam->b_acquire)
+ zr364xx_stop_acquire(cam);
+
+ zr364xx_stop_readpipe(cam);
+ mutex_unlock(&cam->lock);
+ v4l2_device_put(&cam->v4l2_dev);
+}
+
+
+#ifdef CONFIG_PM
+static int zr364xx_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct zr364xx_camera *cam = usb_get_intfdata(intf);
+
+ cam->was_streaming = cam->b_acquire;
+ if (!cam->was_streaming)
+ return 0;
+ zr364xx_stop_acquire(cam);
+ zr364xx_stop_readpipe(cam);
+ return 0;
+}
+
+static int zr364xx_resume(struct usb_interface *intf)
+{
+ struct zr364xx_camera *cam = usb_get_intfdata(intf);
+ int res;
+
+ if (!cam->was_streaming)
+ return 0;
+
+ zr364xx_start_readpipe(cam);
+ res = zr364xx_prepare(cam);
+ if (!res)
+ zr364xx_start_acquire(cam);
+ return res;
+}
+#endif
+
+/**********************/
+/* Module integration */
+/**********************/
+
+static struct usb_driver zr364xx_driver = {
+ .name = "zr364xx",
+ .probe = zr364xx_probe,
+ .disconnect = zr364xx_disconnect,
+#ifdef CONFIG_PM
+ .suspend = zr364xx_suspend,
+ .resume = zr364xx_resume,
+ .reset_resume = zr364xx_resume,
+#endif
+ .id_table = device_table
+};
+
+module_usb_driver(zr364xx_driver);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRIVER_VERSION);
Code Review / kvmfornfv.git / blobdiff