V4L/DVB (5257): USB: add zr364xx V4L2 driver
This patch adds a V4L2 driver giving support for USB webcams based on the
zr364xx chipsets.
Signed-off-by: Antoine Jacquet <royale@zerezo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/zr364xx.c b/drivers/media/video/zr364xx.c
new file mode 100644
index 0000000..c055cf0
--- /dev/null
+++ b/drivers/media/video/zr364xx.c
@@ -0,0 +1,929 @@
+/*
+ * Zoran 364xx based USB webcam module version 0.72
+ *
+ * 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
+ *
+ * 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/version.h>
+#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 <media/v4l2-common.h>
+
+
+/* Version Information */
+#define DRIVER_VERSION "v0.72"
+#define DRIVER_AUTHOR "Antoine Jacquet, http://royale.zerezo.com/"
+#define DRIVER_DESC "Zoran 364xx"
+
+
+/* Camera */
+#define FRAMES 2
+#define MAX_FRAME_SIZE 100000
+#define BUFFER_SIZE 0x1000
+#define CTRL_TIMEOUT 500
+
+
+/* Debug macro */
+#define DBG(x...) if (debug) info(x)
+
+
+/* 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
+
+
+/* Module parameters */
+static int debug = 0;
+static int mode = 0;
+
+
+/* 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 },
+ {} /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, device_table);
+
+
+/* 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 video_device *vdev; /* v4l video device */
+ u8 *framebuf;
+ int nb;
+ unsigned char *buffer;
+ int skip;
+ int brightness;
+ int width;
+ int height;
+ int method;
+ struct mutex lock;
+};
+
+
+/* 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) {
+ info("kmalloc(%d) failed", 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);
+
+ if (status < 0)
+ info("Failed sending control message, error %d.", status);
+
+ 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[3] = { m0, m1, 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;
+
+
+
+/********************/
+/* V4L2 integration */
+/********************/
+
+/* this function reads a full JPEG picture synchronously
+ * TODO: do it asynchronously... */
+static int read_frame(struct zr364xx_camera *cam, int framenum)
+{
+ int i, n, temp, head, size, actual_length;
+ unsigned char *ptr = NULL, *jpeg, swap;
+
+ redo:
+ /* hardware brightness */
+ n = send_control_msg(cam->udev, 1, 0x2001, 0, NULL, 0);
+ temp = (0x60 << 8) + 127 - cam->brightness;
+ n = send_control_msg(cam->udev, 1, temp, 0, NULL, 0);
+
+ /* during the first loop we are going to insert JPEG header */
+ head = 0;
+ /* this is the place in memory where we are going to build
+ * the JPEG image */
+ jpeg = cam->framebuf + framenum * MAX_FRAME_SIZE;
+ /* read data... */
+ do {
+ n = usb_bulk_msg(cam->udev,
+ usb_rcvbulkpipe(cam->udev, 0x81),
+ cam->buffer, BUFFER_SIZE, &actual_length,
+ CTRL_TIMEOUT);
+ DBG("buffer : %d %d", cam->buffer[0], cam->buffer[1]);
+ DBG("bulk : n=%d size=%d", n, actual_length);
+ if (n < 0) {
+ info("error reading bulk msg");
+ return 0;
+ }
+ if (actual_length < 0 || actual_length > BUFFER_SIZE) {
+ info("wrong number of bytes");
+ return 0;
+ }
+
+ /* swap bytes if camera needs it */
+ if (cam->method == METHOD0)
+ for (i = 0; i < BUFFER_SIZE; i += 2) {
+ swap = cam->buffer[i];
+ cam->buffer[i] = cam->buffer[i + 1];
+ cam->buffer[i + 1] = swap;
+ }
+
+ /* write the JPEG header */
+ if (!head) {
+ DBG("jpeg header");
+ ptr = jpeg;
+ memcpy(ptr, header1, sizeof(header1));
+ ptr += sizeof(header1);
+ header3 = 0;
+ memcpy(ptr, &header3, 1);
+ ptr++;
+ memcpy(ptr, cam->buffer, 64);
+ ptr += 64;
+ header3 = 1;
+ memcpy(ptr, &header3, 1);
+ ptr++;
+ memcpy(ptr, cam->buffer + 64, 64);
+ ptr += 64;
+ memcpy(ptr, header2, sizeof(header2));
+ ptr += sizeof(header2);
+ memcpy(ptr, cam->buffer + 128,
+ actual_length - 128);
+ ptr += actual_length - 128;
+ head = 1;
+ DBG("header : %d %d %d %d %d %d %d %d %d",
+ cam->buffer[0], cam->buffer[1], cam->buffer[2],
+ cam->buffer[3], cam->buffer[4], cam->buffer[5],
+ cam->buffer[6], cam->buffer[7], cam->buffer[8]);
+ } else {
+ memcpy(ptr, cam->buffer, actual_length);
+ ptr += actual_length;
+ }
+ }
+ /* ... until there is no more */
+ while (actual_length == BUFFER_SIZE);
+
+ /* we skip the 2 first frames which are usually buggy */
+ if (cam->skip) {
+ cam->skip--;
+ goto redo;
+ }
+
+ /* go back to find the JPEG EOI marker */
+ size = ptr - jpeg;
+ ptr -= 2;
+ while (ptr > jpeg) {
+ if (*ptr == 0xFF && *(ptr + 1) == 0xD9
+ && *(ptr + 2) == 0xFF)
+ break;
+ ptr--;
+ }
+ if (ptr == jpeg)
+ DBG("No EOI marker");
+
+ /* Sometimes there is junk data in the middle of the picture,
+ * we want to skip this bogus frames */
+ while (ptr > jpeg) {
+ if (*ptr == 0xFF && *(ptr + 1) == 0xFF
+ && *(ptr + 2) == 0xFF)
+ break;
+ ptr--;
+ }
+ if (ptr != jpeg) {
+ DBG("Bogus frame ? %d", cam->nb);
+ goto redo;
+ }
+
+ DBG("jpeg : %d %d %d %d %d %d %d %d",
+ jpeg[0], jpeg[1], jpeg[2], jpeg[3],
+ jpeg[4], jpeg[5], jpeg[6], jpeg[7]);
+
+ return size;
+}
+
+
+static ssize_t zr364xx_read(struct file *file, char *buf, size_t cnt,
+ loff_t * ppos)
+{
+ unsigned long count = cnt;
+ struct video_device *vdev = video_devdata(file);
+ struct zr364xx_camera *cam;
+
+ DBG("zr364xx_read: read %d bytes.", (int) count);
+
+ if (vdev == NULL)
+ return -ENODEV;
+ cam = video_get_drvdata(vdev);
+
+ if (!buf)
+ return -EINVAL;
+
+ if (!count)
+ return -EINVAL;
+
+ /* NoMan Sux ! */
+ count = read_frame(cam, 0);
+
+ if (copy_to_user(buf, cam->framebuf, count))
+ return -EFAULT;
+
+ return count;
+}
+
+
+static int zr364xx_vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ memset(cap, 0, sizeof(*cap));
+ strcpy(cap->driver, DRIVER_DESC);
+ cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE;
+ return 0;
+}
+
+static int zr364xx_vidioc_enum_input(struct file *file, void *priv,
+ struct v4l2_input *i)
+{
+ if (i->index != 0)
+ return -EINVAL;
+ memset(i, 0, sizeof(*i));
+ i->index = 0;
+ 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_vidioc_queryctrl(struct file *file, void *priv,
+ struct v4l2_queryctrl *c)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct zr364xx_camera *cam;
+
+ if (vdev == NULL)
+ return -ENODEV;
+ cam = video_get_drvdata(vdev);
+
+ switch (c->id) {
+ case V4L2_CID_BRIGHTNESS:
+ c->type = V4L2_CTRL_TYPE_INTEGER;
+ strcpy(c->name, "Brightness");
+ c->minimum = 0;
+ c->maximum = 127;
+ c->step = 1;
+ c->default_value = cam->brightness;
+ c->flags = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int zr364xx_vidioc_s_ctrl(struct file *file, void *priv,
+ struct v4l2_control *c)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct zr364xx_camera *cam;
+
+ if (vdev == NULL)
+ return -ENODEV;
+ cam = video_get_drvdata(vdev);
+
+ switch (c->id) {
+ case V4L2_CID_BRIGHTNESS:
+ cam->brightness = c->value;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int zr364xx_vidioc_g_ctrl(struct file *file, void *priv,
+ struct v4l2_control *c)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct zr364xx_camera *cam;
+
+ if (vdev == NULL)
+ return -ENODEV;
+ cam = video_get_drvdata(vdev);
+
+ switch (c->id) {
+ case V4L2_CID_BRIGHTNESS:
+ c->value = cam->brightness;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int zr364xx_vidioc_enum_fmt_cap(struct file *file,
+ void *priv, struct v4l2_fmtdesc *f)
+{
+ if (f->index > 0)
+ return -EINVAL;
+ if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ memset(f, 0, sizeof(*f));
+ f->index = 0;
+ f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ f->flags = V4L2_FMT_FLAG_COMPRESSED;
+ strcpy(f->description, "JPEG");
+ f->pixelformat = V4L2_PIX_FMT_JPEG;
+ return 0;
+}
+
+static int zr364xx_vidioc_try_fmt_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct zr364xx_camera *cam;
+
+ if (vdev == NULL)
+ return -ENODEV;
+ cam = video_get_drvdata(vdev);
+
+ if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
+ return -EINVAL;
+ if (f->fmt.pix.field != V4L2_FIELD_ANY &&
+ f->fmt.pix.field != V4L2_FIELD_NONE)
+ return -EINVAL;
+ 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 = 0;
+ f->fmt.pix.priv = 0;
+ return 0;
+}
+
+static int zr364xx_vidioc_g_fmt_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct zr364xx_camera *cam;
+
+ if (vdev == NULL)
+ return -ENODEV;
+ cam = video_get_drvdata(vdev);
+
+ if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ memset(&f->fmt.pix, 0, sizeof(struct v4l2_pix_format));
+ f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ f->fmt.pix.pixelformat = V4L2_PIX_FMT_JPEG;
+ 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 = 0;
+ f->fmt.pix.priv = 0;
+ return 0;
+}
+
+static int zr364xx_vidioc_s_fmt_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct zr364xx_camera *cam;
+
+ if (vdev == NULL)
+ return -ENODEV;
+ cam = video_get_drvdata(vdev);
+
+ if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
+ return -EINVAL;
+ if (f->fmt.pix.field != V4L2_FIELD_ANY &&
+ f->fmt.pix.field != V4L2_FIELD_NONE)
+ return -EINVAL;
+ 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 = 0;
+ f->fmt.pix.priv = 0;
+ DBG("ok!");
+ return 0;
+}
+
+static int zr364xx_vidioc_streamon(struct file *file, void *priv,
+ enum v4l2_buf_type type)
+{
+ return 0;
+}
+
+static int zr364xx_vidioc_streamoff(struct file *file, void *priv,
+ enum v4l2_buf_type type)
+{
+ return 0;
+}
+
+
+/* open the camera */
+static int zr364xx_open(struct inode *inode, struct file *file)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct zr364xx_camera *cam = video_get_drvdata(vdev);
+ struct usb_device *udev = cam->udev;
+ int i, err;
+
+ DBG("zr364xx_open");
+
+ cam->skip = 2;
+
+ err = video_exclusive_open(inode, file);
+ if (err < 0)
+ return err;
+
+ if (!cam->framebuf) {
+ cam->framebuf = vmalloc_32(MAX_FRAME_SIZE * FRAMES);
+ if (!cam->framebuf) {
+ info("vmalloc_32 failed!");
+ return -ENOMEM;
+ }
+ }
+
+ mutex_lock(&cam->lock);
+ for (i = 0; init[cam->method][i].size != -1; i++) {
+ err =
+ send_control_msg(udev, 1, init[cam->method][i].value,
+ 0, init[cam->method][i].bytes,
+ init[cam->method][i].size);
+ if (err < 0) {
+ info("error during open sequence: %d", i);
+ mutex_unlock(&cam->lock);
+ return err;
+ }
+ }
+
+ file->private_data = vdev;
+
+ /* 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 0;
+}
+
+
+/* release the camera */
+static int zr364xx_release(struct inode *inode, struct file *file)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct zr364xx_camera *cam;
+ struct usb_device *udev;
+ int i, err;
+
+ DBG("zr364xx_release");
+
+ if (vdev == NULL)
+ return -ENODEV;
+ cam = video_get_drvdata(vdev);
+
+ udev = cam->udev;
+
+ mutex_lock(&cam->lock);
+ for (i = 0; i < 2; i++) {
+ err =
+ send_control_msg(udev, 1, init[cam->method][i].value,
+ 0, init[i][cam->method].bytes,
+ init[cam->method][i].size);
+ if (err < 0) {
+ info("error during release sequence");
+ mutex_unlock(&cam->lock);
+ return err;
+ }
+ }
+
+ file->private_data = NULL;
+ video_exclusive_release(inode, file);
+
+ /* 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 0;
+}
+
+
+static int zr364xx_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ void *pos;
+ unsigned long start = vma->vm_start;
+ unsigned long size = vma->vm_end - vma->vm_start;
+ struct video_device *vdev = video_devdata(file);
+ struct zr364xx_camera *cam;
+
+ DBG("zr364xx_mmap: %ld\n", size);
+
+ if (vdev == NULL)
+ return -ENODEV;
+ cam = video_get_drvdata(vdev);
+
+ pos = cam->framebuf;
+ while (size > 0) {
+ if (vm_insert_page(vma, start, vmalloc_to_page(pos)))
+ return -EAGAIN;
+ start += PAGE_SIZE;
+ pos += PAGE_SIZE;
+ if (size > PAGE_SIZE)
+ size -= PAGE_SIZE;
+ else
+ size = 0;
+ }
+
+ return 0;
+}
+
+
+static struct file_operations zr364xx_fops = {
+ .owner = THIS_MODULE,
+ .open = zr364xx_open,
+ .release = zr364xx_release,
+ .read = zr364xx_read,
+ .mmap = zr364xx_mmap,
+ .ioctl = video_ioctl2,
+ .llseek = no_llseek,
+};
+
+static struct video_device zr364xx_template = {
+ .owner = THIS_MODULE,
+ .name = DRIVER_DESC,
+ .type = VID_TYPE_CAPTURE,
+ .fops = &zr364xx_fops,
+ .release = video_device_release,
+ .minor = -1,
+
+ .vidioc_querycap = zr364xx_vidioc_querycap,
+ .vidioc_enum_fmt_cap = zr364xx_vidioc_enum_fmt_cap,
+ .vidioc_try_fmt_cap = zr364xx_vidioc_try_fmt_cap,
+ .vidioc_s_fmt_cap = zr364xx_vidioc_s_fmt_cap,
+ .vidioc_g_fmt_cap = zr364xx_vidioc_g_fmt_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_queryctrl = zr364xx_vidioc_queryctrl,
+ .vidioc_g_ctrl = zr364xx_vidioc_g_ctrl,
+ .vidioc_s_ctrl = zr364xx_vidioc_s_ctrl,
+};
+
+
+
+/*******************/
+/* USB integration */
+/*******************/
+
+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;
+
+ DBG("probing...");
+
+ info(DRIVER_DESC " compatible webcam plugged");
+ info("model %04x:%04x detected", udev->descriptor.idVendor,
+ udev->descriptor.idProduct);
+
+ if ((cam =
+ kmalloc(sizeof(struct zr364xx_camera), GFP_KERNEL)) == NULL) {
+ info("cam: out of memory !");
+ return -ENODEV;
+ }
+ memset(cam, 0x00, sizeof(struct zr364xx_camera));
+ /* save the init method used by this camera */
+ cam->method = id->driver_info;
+
+ cam->vdev = video_device_alloc();
+ if (cam->vdev == NULL) {
+ info("cam->vdev: out of memory !");
+ kfree(cam);
+ return -ENODEV;
+ }
+ memcpy(cam->vdev, &zr364xx_template, sizeof(zr364xx_template));
+ video_set_drvdata(cam->vdev, cam);
+ if (debug)
+ cam->vdev->debug = V4L2_DEBUG_IOCTL | V4L2_DEBUG_IOCTL_ARG;
+
+ cam->udev = udev;
+
+ if ((cam->buffer = kmalloc(BUFFER_SIZE, GFP_KERNEL)) == NULL) {
+ info("cam->buffer: out of memory !");
+ video_device_release(cam->vdev);
+ kfree(cam);
+ return -ENODEV;
+ }
+
+ switch (mode) {
+ case 1:
+ info("160x120 mode selected");
+ cam->width = 160;
+ cam->height = 120;
+ break;
+ case 2:
+ info("640x480 mode selected");
+ cam->width = 640;
+ cam->height = 480;
+ break;
+ default:
+ info("320x240 mode selected");
+ cam->width = 320;
+ cam->height = 240;
+ break;
+ }
+
+ m0d1[0] = mode;
+ m1[2].value = 0xf000 + mode;
+ m2[1].value = 0xf000 + mode;
+ header2[437] = cam->height / 256;
+ header2[438] = cam->height % 256;
+ header2[439] = cam->width / 256;
+ header2[440] = cam->width % 256;
+
+ cam->nb = 0;
+ cam->brightness = 64;
+ mutex_init(&cam->lock);
+
+ if (video_register_device(cam->vdev, VFL_TYPE_GRABBER, -1) == -1) {
+ info("video_register_device failed");
+ video_device_release(cam->vdev);
+ kfree(cam->buffer);
+ kfree(cam);
+ return -ENODEV;
+ }
+
+ usb_set_intfdata(intf, cam);
+
+ info(DRIVER_DESC " controlling video device %d", cam->vdev->minor);
+ return 0;
+}
+
+
+static void zr364xx_disconnect(struct usb_interface *intf)
+{
+ struct zr364xx_camera *cam = usb_get_intfdata(intf);
+ usb_set_intfdata(intf, NULL);
+ dev_set_drvdata(&intf->dev, NULL);
+ info(DRIVER_DESC " webcam unplugged");
+ if (cam->vdev)
+ video_unregister_device(cam->vdev);
+ cam->vdev = NULL;
+ kfree(cam->buffer);
+ if (cam->framebuf)
+ vfree(cam->framebuf);
+ kfree(cam);
+}
+
+
+
+/**********************/
+/* Module integration */
+/**********************/
+
+static struct usb_driver zr364xx_driver = {
+ .name = "zr364xx",
+ .probe = zr364xx_probe,
+ .disconnect = zr364xx_disconnect,
+ .id_table = device_table
+};
+
+
+static int __init zr364xx_init(void)
+{
+ int retval;
+ retval = usb_register(&zr364xx_driver) < 0;
+ if (retval)
+ info("usb_register failed!");
+ else
+ info(DRIVER_DESC " module loaded");
+ return retval;
+}
+
+
+static void __exit zr364xx_exit(void)
+{
+ info(DRIVER_DESC " module unloaded");
+ usb_deregister(&zr364xx_driver);
+}
+
+
+module_init(zr364xx_init);
+module_exit(zr364xx_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");