/* * 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 * 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 #include #include #include #include #include #include #include #include /* 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) printk(KERN_INFO KBUILD_MODNAME 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; 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 = 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; int users; }; /* 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); if (status < 0) dev_err(&udev->dev, "Failed sending control message, error %d.\n", 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; 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) { dev_err(&cam->udev->dev, "error reading bulk msg\n"); return 0; } if (actual_length < 0 || actual_length > BUFFER_SIZE) { dev_err(&cam->udev->dev, "wrong number of bytes\n"); return 0; } /* swap bytes if camera needs it */ if (cam->method == METHOD0) { u16 *buf = (u16*)cam->buffer; for (i = 0; i < BUFFER_SIZE/2; i++) swab16s(buf + i); } /* 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 __user *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) { 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; 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_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, "JPEG"); f->pixelformat = V4L2_PIX_FMT_JPEG; return 0; } static int zr364xx_vidioc_try_fmt_vid_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->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_vid_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); 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_vid_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->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 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"); mutex_lock(&cam->lock); if (cam->users) { err = -EBUSY; goto out; } if (!cam->framebuf) { cam->framebuf = vmalloc_32(MAX_FRAME_SIZE * FRAMES); if (!cam->framebuf) { dev_err(&cam->udev->dev, "vmalloc_32 failed!\n"); err = -ENOMEM; goto out; } } 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) { dev_err(&cam->udev->dev, "error during open sequence: %d\n", i); goto out; } } cam->skip = 2; cam->users++; 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); err = 0; out: mutex_unlock(&cam->lock); return err; } /* release the camera */ static int zr364xx_release(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); cam->users--; file->private_data = NULL; for (i = 0; i < 2; 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) { dev_err(&udev->dev, "error during release sequence\n"); 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); return err; } 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 const struct v4l2_file_operations zr364xx_fops = { .owner = THIS_MODULE, .open = zr364xx_open, .release = zr364xx_release, .read = zr364xx_read, .mmap = zr364xx_mmap, .ioctl = video_ioctl2, }; 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_queryctrl = zr364xx_vidioc_queryctrl, .vidioc_g_ctrl = zr364xx_vidioc_g_ctrl, .vidioc_s_ctrl = zr364xx_vidioc_s_ctrl, }; static struct video_device zr364xx_template = { .name = DRIVER_DESC, .fops = &zr364xx_fops, .ioctl_ops = &zr364xx_ioctl_ops, .release = video_device_release, .minor = -1, }; /*******************/ /* 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; int err; DBG("probing..."); 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; } /* save the init method used by this camera */ cam->method = id->driver_info; cam->vdev = video_device_alloc(); if (cam->vdev == NULL) { dev_err(&udev->dev, "cam->vdev: out of memory !\n"); kfree(cam); return -ENOMEM; } 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) { dev_info(&udev->dev, "cam->buffer: out of memory !\n"); video_device_release(cam->vdev); kfree(cam); return -ENODEV; } 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; 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); err = video_register_device(cam->vdev, VFL_TYPE_GRABBER, -1); if (err) { dev_err(&udev->dev, "video_register_device failed\n"); video_device_release(cam->vdev); kfree(cam->buffer); kfree(cam); return err; } usb_set_intfdata(intf, cam); dev_info(&udev->dev, DRIVER_DESC " controlling video device %d\n", cam->vdev->num); return 0; } static void zr364xx_disconnect(struct usb_interface *intf) { struct zr364xx_camera *cam = usb_get_intfdata(intf); usb_set_intfdata(intf, NULL); dev_info(&intf->dev, DRIVER_DESC " webcam unplugged\n"); if (cam->vdev) video_unregister_device(cam->vdev); cam->vdev = NULL; kfree(cam->buffer); cam->buffer = NULL; vfree(cam->framebuf); cam->framebuf = NULL; kfree(cam); cam = NULL; } /**********************/ /* 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); if (retval) printk(KERN_ERR KBUILD_MODNAME ": usb_register failed!\n"); else printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); return retval; } static void __exit zr364xx_exit(void) { printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC " module unloaded\n"); usb_deregister(&zr364xx_driver); } module_init(zr364xx_init); module_exit(zr364xx_exit); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL");