--- /dev/null
+/****************************************************************************
+ *
+ * Filename: cpia2_v4l.c
+ *
+ * Copyright 2001, STMicrolectronics, Inc.
+ * Contact: steve.miller@st.com
+ * Copyright 2001,2005, Scott J. Bertin <scottbertin@yahoo.com>
+ *
+ * Description:
+ * This is a USB driver for CPia2 based video cameras.
+ * The infrastructure of this driver is based on the cpia usb driver by
+ * Jochen Scharrlach and Johannes Erdfeldt.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Stripped of 2.4 stuff ready for main kernel submit by
+ * Alan Cox <alan@lxorguk.ukuu.org.uk>
+ ****************************************************************************/
+
+#define CPIA_VERSION "3.0.1"
+
+#include <linux/module.h>
+#include <linux/time.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/videodev2.h>
+#include <linux/stringify.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-event.h>
+
+#include "cpia2.h"
+
+static int video_nr = -1;
+module_param(video_nr, int, 0);
+MODULE_PARM_DESC(video_nr, "video device to register (0=/dev/video0, etc)");
+
+static int buffer_size = 68 * 1024;
+module_param(buffer_size, int, 0);
+MODULE_PARM_DESC(buffer_size, "Size for each frame buffer in bytes (default 68k)");
+
+static int num_buffers = 3;
+module_param(num_buffers, int, 0);
+MODULE_PARM_DESC(num_buffers, "Number of frame buffers (1-"
+ __stringify(VIDEO_MAX_FRAME) ", default 3)");
+
+static int alternate = DEFAULT_ALT;
+module_param(alternate, int, 0);
+MODULE_PARM_DESC(alternate, "USB Alternate (" __stringify(USBIF_ISO_1) "-"
+ __stringify(USBIF_ISO_6) ", default "
+ __stringify(DEFAULT_ALT) ")");
+
+static int flicker_mode;
+module_param(flicker_mode, int, 0);
+MODULE_PARM_DESC(flicker_mode, "Flicker frequency (0 (disabled), " __stringify(50) " or "
+ __stringify(60) ", default 0)");
+
+MODULE_AUTHOR("Steve Miller (STMicroelectronics) <steve.miller@st.com>");
+MODULE_DESCRIPTION("V4L-driver for STMicroelectronics CPiA2 based cameras");
+MODULE_SUPPORTED_DEVICE("video");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(CPIA_VERSION);
+
+#define ABOUT "V4L-Driver for Vision CPiA2 based cameras"
+#define CPIA2_CID_USB_ALT (V4L2_CID_USER_BASE | 0xf000)
+
+/******************************************************************************
+ *
+ * cpia2_open
+ *
+ *****************************************************************************/
+static int cpia2_open(struct file *file)
+{
+ struct camera_data *cam = video_drvdata(file);
+ int retval;
+
+ if (mutex_lock_interruptible(&cam->v4l2_lock))
+ return -ERESTARTSYS;
+ retval = v4l2_fh_open(file);
+ if (retval)
+ goto open_unlock;
+
+ if (v4l2_fh_is_singular_file(file)) {
+ if (cpia2_allocate_buffers(cam)) {
+ v4l2_fh_release(file);
+ retval = -ENOMEM;
+ goto open_unlock;
+ }
+
+ /* reset the camera */
+ if (cpia2_reset_camera(cam) < 0) {
+ v4l2_fh_release(file);
+ retval = -EIO;
+ goto open_unlock;
+ }
+
+ cam->APP_len = 0;
+ cam->COM_len = 0;
+ }
+
+ cpia2_dbg_dump_registers(cam);
+open_unlock:
+ mutex_unlock(&cam->v4l2_lock);
+ return retval;
+}
+
+/******************************************************************************
+ *
+ * cpia2_close
+ *
+ *****************************************************************************/
+static int cpia2_close(struct file *file)
+{
+ struct video_device *dev = video_devdata(file);
+ struct camera_data *cam = video_get_drvdata(dev);
+
+ mutex_lock(&cam->v4l2_lock);
+ if (video_is_registered(&cam->vdev) && v4l2_fh_is_singular_file(file)) {
+ cpia2_usb_stream_stop(cam);
+
+ /* save camera state for later open */
+ cpia2_save_camera_state(cam);
+
+ cpia2_set_low_power(cam);
+ cpia2_free_buffers(cam);
+ }
+
+ if (cam->stream_fh == file->private_data) {
+ cam->stream_fh = NULL;
+ cam->mmapped = 0;
+ }
+ mutex_unlock(&cam->v4l2_lock);
+ return v4l2_fh_release(file);
+}
+
+/******************************************************************************
+ *
+ * cpia2_v4l_read
+ *
+ *****************************************************************************/
+static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count,
+ loff_t *off)
+{
+ struct camera_data *cam = video_drvdata(file);
+ int noblock = file->f_flags&O_NONBLOCK;
+ ssize_t ret;
+
+ if(!cam)
+ return -EINVAL;
+
+ if (mutex_lock_interruptible(&cam->v4l2_lock))
+ return -ERESTARTSYS;
+ ret = cpia2_read(cam, buf, count, noblock);
+ mutex_unlock(&cam->v4l2_lock);
+ return ret;
+}
+
+
+/******************************************************************************
+ *
+ * cpia2_v4l_poll
+ *
+ *****************************************************************************/
+static unsigned int cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait)
+{
+ struct camera_data *cam = video_drvdata(filp);
+ unsigned int res;
+
+ mutex_lock(&cam->v4l2_lock);
+ res = cpia2_poll(cam, filp, wait);
+ mutex_unlock(&cam->v4l2_lock);
+ return res;
+}
+
+
+static int sync(struct camera_data *cam, int frame_nr)
+{
+ struct framebuf *frame = &cam->buffers[frame_nr];
+
+ while (1) {
+ if (frame->status == FRAME_READY)
+ return 0;
+
+ if (!cam->streaming) {
+ frame->status = FRAME_READY;
+ frame->length = 0;
+ return 0;
+ }
+
+ mutex_unlock(&cam->v4l2_lock);
+ wait_event_interruptible(cam->wq_stream,
+ !cam->streaming ||
+ frame->status == FRAME_READY);
+ mutex_lock(&cam->v4l2_lock);
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+ if (!video_is_registered(&cam->vdev))
+ return -ENOTTY;
+ }
+}
+
+/******************************************************************************
+ *
+ * ioctl_querycap
+ *
+ * V4L2 device capabilities
+ *
+ *****************************************************************************/
+
+static int cpia2_querycap(struct file *file, void *fh, struct v4l2_capability *vc)
+{
+ struct camera_data *cam = video_drvdata(file);
+
+ strcpy(vc->driver, "cpia2");
+
+ if (cam->params.pnp_id.product == 0x151)
+ strcpy(vc->card, "QX5 Microscope");
+ else
+ strcpy(vc->card, "CPiA2 Camera");
+ switch (cam->params.pnp_id.device_type) {
+ case DEVICE_STV_672:
+ strcat(vc->card, " (672/");
+ break;
+ case DEVICE_STV_676:
+ strcat(vc->card, " (676/");
+ break;
+ default:
+ strcat(vc->card, " (XXX/");
+ break;
+ }
+ switch (cam->params.version.sensor_flags) {
+ case CPIA2_VP_SENSOR_FLAGS_404:
+ strcat(vc->card, "404)");
+ break;
+ case CPIA2_VP_SENSOR_FLAGS_407:
+ strcat(vc->card, "407)");
+ break;
+ case CPIA2_VP_SENSOR_FLAGS_409:
+ strcat(vc->card, "409)");
+ break;
+ case CPIA2_VP_SENSOR_FLAGS_410:
+ strcat(vc->card, "410)");
+ break;
+ case CPIA2_VP_SENSOR_FLAGS_500:
+ strcat(vc->card, "500)");
+ break;
+ default:
+ strcat(vc->card, "XXX)");
+ break;
+ }
+
+ if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0)
+ memset(vc->bus_info,0, sizeof(vc->bus_info));
+
+ vc->device_caps = V4L2_CAP_VIDEO_CAPTURE |
+ V4L2_CAP_READWRITE |
+ V4L2_CAP_STREAMING;
+ vc->capabilities = vc->device_caps |
+ V4L2_CAP_DEVICE_CAPS;
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_input
+ *
+ * V4L2 input get/set/enumerate
+ *
+ *****************************************************************************/
+
+static int cpia2_enum_input(struct file *file, void *fh, struct v4l2_input *i)
+{
+ if (i->index)
+ return -EINVAL;
+ strcpy(i->name, "Camera");
+ i->type = V4L2_INPUT_TYPE_CAMERA;
+ return 0;
+}
+
+static int cpia2_g_input(struct file *file, void *fh, unsigned int *i)
+{
+ *i = 0;
+ return 0;
+}
+
+static int cpia2_s_input(struct file *file, void *fh, unsigned int i)
+{
+ return i ? -EINVAL : 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_enum_fmt
+ *
+ * V4L2 format enumerate
+ *
+ *****************************************************************************/
+
+static int cpia2_enum_fmt_vid_cap(struct file *file, void *fh,
+ struct v4l2_fmtdesc *f)
+{
+ int index = f->index;
+
+ if (index < 0 || index > 1)
+ return -EINVAL;
+
+ memset(f, 0, sizeof(*f));
+ f->index = index;
+ f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ f->flags = V4L2_FMT_FLAG_COMPRESSED;
+ switch(index) {
+ case 0:
+ strcpy(f->description, "MJPEG");
+ f->pixelformat = V4L2_PIX_FMT_MJPEG;
+ break;
+ case 1:
+ strcpy(f->description, "JPEG");
+ f->pixelformat = V4L2_PIX_FMT_JPEG;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_try_fmt
+ *
+ * V4L2 format try
+ *
+ *****************************************************************************/
+
+static int cpia2_try_fmt_vid_cap(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct camera_data *cam = video_drvdata(file);
+
+ if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG &&
+ f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
+ return -EINVAL;
+
+ f->fmt.pix.field = V4L2_FIELD_NONE;
+ f->fmt.pix.bytesperline = 0;
+ f->fmt.pix.sizeimage = cam->frame_size;
+ f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
+ f->fmt.pix.priv = 0;
+
+ switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) {
+ case VIDEOSIZE_VGA:
+ f->fmt.pix.width = 640;
+ f->fmt.pix.height = 480;
+ break;
+ case VIDEOSIZE_CIF:
+ f->fmt.pix.width = 352;
+ f->fmt.pix.height = 288;
+ break;
+ case VIDEOSIZE_QVGA:
+ f->fmt.pix.width = 320;
+ f->fmt.pix.height = 240;
+ break;
+ case VIDEOSIZE_288_216:
+ f->fmt.pix.width = 288;
+ f->fmt.pix.height = 216;
+ break;
+ case VIDEOSIZE_256_192:
+ f->fmt.pix.width = 256;
+ f->fmt.pix.height = 192;
+ break;
+ case VIDEOSIZE_224_168:
+ f->fmt.pix.width = 224;
+ f->fmt.pix.height = 168;
+ break;
+ case VIDEOSIZE_192_144:
+ f->fmt.pix.width = 192;
+ f->fmt.pix.height = 144;
+ break;
+ case VIDEOSIZE_QCIF:
+ default:
+ f->fmt.pix.width = 176;
+ f->fmt.pix.height = 144;
+ break;
+ }
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_set_fmt
+ *
+ * V4L2 format set
+ *
+ *****************************************************************************/
+
+static int cpia2_s_fmt_vid_cap(struct file *file, void *_fh,
+ struct v4l2_format *f)
+{
+ struct camera_data *cam = video_drvdata(file);
+ int err, frame;
+
+ err = cpia2_try_fmt_vid_cap(file, _fh, f);
+ if(err != 0)
+ return err;
+
+ cam->pixelformat = f->fmt.pix.pixelformat;
+
+ /* NOTE: This should be set to 1 for MJPEG, but some apps don't handle
+ * the missing Huffman table properly. */
+ cam->params.compression.inhibit_htables = 0;
+ /*f->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG;*/
+
+ /* we set the video window to something smaller or equal to what
+ * is requested by the user???
+ */
+ DBG("Requested width = %d, height = %d\n",
+ f->fmt.pix.width, f->fmt.pix.height);
+ if (f->fmt.pix.width != cam->width ||
+ f->fmt.pix.height != cam->height) {
+ cam->width = f->fmt.pix.width;
+ cam->height = f->fmt.pix.height;
+ cam->params.roi.width = f->fmt.pix.width;
+ cam->params.roi.height = f->fmt.pix.height;
+ cpia2_set_format(cam);
+ }
+
+ for (frame = 0; frame < cam->num_frames; ++frame) {
+ if (cam->buffers[frame].status == FRAME_READING)
+ if ((err = sync(cam, frame)) < 0)
+ return err;
+
+ cam->buffers[frame].status = FRAME_EMPTY;
+ }
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_get_fmt
+ *
+ * V4L2 format get
+ *
+ *****************************************************************************/
+
+static int cpia2_g_fmt_vid_cap(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct camera_data *cam = video_drvdata(file);
+
+ f->fmt.pix.width = cam->width;
+ f->fmt.pix.height = cam->height;
+ f->fmt.pix.pixelformat = cam->pixelformat;
+ f->fmt.pix.field = V4L2_FIELD_NONE;
+ f->fmt.pix.bytesperline = 0;
+ f->fmt.pix.sizeimage = cam->frame_size;
+ f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
+ f->fmt.pix.priv = 0;
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_cropcap
+ *
+ * V4L2 query cropping capabilities
+ * NOTE: cropping is currently disabled
+ *
+ *****************************************************************************/
+
+static int cpia2_cropcap(struct file *file, void *fh, struct v4l2_cropcap *c)
+{
+ struct camera_data *cam = video_drvdata(file);
+
+ if (c->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ c->bounds.left = 0;
+ c->bounds.top = 0;
+ c->bounds.width = cam->width;
+ c->bounds.height = cam->height;
+ c->defrect.left = 0;
+ c->defrect.top = 0;
+ c->defrect.width = cam->width;
+ c->defrect.height = cam->height;
+ c->pixelaspect.numerator = 1;
+ c->pixelaspect.denominator = 1;
+
+ return 0;
+}
+
+struct framerate_info {
+ int value;
+ struct v4l2_fract period;
+};
+
+static const struct framerate_info framerate_controls[] = {
+ { CPIA2_VP_FRAMERATE_6_25, { 4, 25 } },
+ { CPIA2_VP_FRAMERATE_7_5, { 2, 15 } },
+ { CPIA2_VP_FRAMERATE_12_5, { 2, 25 } },
+ { CPIA2_VP_FRAMERATE_15, { 1, 15 } },
+ { CPIA2_VP_FRAMERATE_25, { 1, 25 } },
+ { CPIA2_VP_FRAMERATE_30, { 1, 30 } },
+};
+
+static int cpia2_g_parm(struct file *file, void *fh, struct v4l2_streamparm *p)
+{
+ struct camera_data *cam = video_drvdata(file);
+ struct v4l2_captureparm *cap = &p->parm.capture;
+ int i;
+
+ if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ cap->capability = V4L2_CAP_TIMEPERFRAME;
+ cap->readbuffers = cam->num_frames;
+ for (i = 0; i < ARRAY_SIZE(framerate_controls); i++)
+ if (cam->params.vp_params.frame_rate == framerate_controls[i].value) {
+ cap->timeperframe = framerate_controls[i].period;
+ break;
+ }
+ return 0;
+}
+
+static int cpia2_s_parm(struct file *file, void *fh, struct v4l2_streamparm *p)
+{
+ struct camera_data *cam = video_drvdata(file);
+ struct v4l2_captureparm *cap = &p->parm.capture;
+ struct v4l2_fract tpf = cap->timeperframe;
+ int max = ARRAY_SIZE(framerate_controls) - 1;
+ int ret;
+ int i;
+
+ ret = cpia2_g_parm(file, fh, p);
+ if (ret || !tpf.denominator || !tpf.numerator)
+ return ret;
+
+ /* Maximum 15 fps for this model */
+ if (cam->params.pnp_id.device_type == DEVICE_STV_672 &&
+ cam->params.version.sensor_flags == CPIA2_VP_SENSOR_FLAGS_500)
+ max -= 2;
+ for (i = 0; i <= max; i++) {
+ struct v4l2_fract f1 = tpf;
+ struct v4l2_fract f2 = framerate_controls[i].period;
+
+ f1.numerator *= f2.denominator;
+ f2.numerator *= f1.denominator;
+ if (f1.numerator >= f2.numerator)
+ break;
+ }
+ if (i > max)
+ i = max;
+ cap->timeperframe = framerate_controls[i].period;
+ return cpia2_set_fps(cam, framerate_controls[i].value);
+}
+
+static const struct {
+ u32 width;
+ u32 height;
+} cpia2_framesizes[] = {
+ { 640, 480 },
+ { 352, 288 },
+ { 320, 240 },
+ { 288, 216 },
+ { 256, 192 },
+ { 224, 168 },
+ { 192, 144 },
+ { 176, 144 },
+};
+
+static int cpia2_enum_framesizes(struct file *file, void *fh,
+ struct v4l2_frmsizeenum *fsize)
+{
+
+ if (fsize->pixel_format != V4L2_PIX_FMT_MJPEG &&
+ fsize->pixel_format != V4L2_PIX_FMT_JPEG)
+ return -EINVAL;
+ if (fsize->index >= ARRAY_SIZE(cpia2_framesizes))
+ return -EINVAL;
+ fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+ fsize->discrete.width = cpia2_framesizes[fsize->index].width;
+ fsize->discrete.height = cpia2_framesizes[fsize->index].height;
+
+ return 0;
+}
+
+static int cpia2_enum_frameintervals(struct file *file, void *fh,
+ struct v4l2_frmivalenum *fival)
+{
+ struct camera_data *cam = video_drvdata(file);
+ int max = ARRAY_SIZE(framerate_controls) - 1;
+ int i;
+
+ if (fival->pixel_format != V4L2_PIX_FMT_MJPEG &&
+ fival->pixel_format != V4L2_PIX_FMT_JPEG)
+ return -EINVAL;
+
+ /* Maximum 15 fps for this model */
+ if (cam->params.pnp_id.device_type == DEVICE_STV_672 &&
+ cam->params.version.sensor_flags == CPIA2_VP_SENSOR_FLAGS_500)
+ max -= 2;
+ if (fival->index > max)
+ return -EINVAL;
+ for (i = 0; i < ARRAY_SIZE(cpia2_framesizes); i++)
+ if (fival->width == cpia2_framesizes[i].width &&
+ fival->height == cpia2_framesizes[i].height)
+ break;
+ if (i == ARRAY_SIZE(cpia2_framesizes))
+ return -EINVAL;
+ fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
+ fival->discrete = framerate_controls[fival->index].period;
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_s_ctrl
+ *
+ * V4L2 set the value of a control variable
+ *
+ *****************************************************************************/
+
+static int cpia2_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct camera_data *cam =
+ container_of(ctrl->handler, struct camera_data, hdl);
+ static const int flicker_table[] = {
+ NEVER_FLICKER,
+ FLICKER_50,
+ FLICKER_60,
+ };
+
+ DBG("Set control id:%d, value:%d\n", ctrl->id, ctrl->val);
+
+ switch (ctrl->id) {
+ case V4L2_CID_BRIGHTNESS:
+ cpia2_set_brightness(cam, ctrl->val);
+ break;
+ case V4L2_CID_CONTRAST:
+ cpia2_set_contrast(cam, ctrl->val);
+ break;
+ case V4L2_CID_SATURATION:
+ cpia2_set_saturation(cam, ctrl->val);
+ break;
+ case V4L2_CID_HFLIP:
+ cpia2_set_property_mirror(cam, ctrl->val);
+ break;
+ case V4L2_CID_VFLIP:
+ cpia2_set_property_flip(cam, ctrl->val);
+ break;
+ case V4L2_CID_POWER_LINE_FREQUENCY:
+ return cpia2_set_flicker_mode(cam, flicker_table[ctrl->val]);
+ case V4L2_CID_ILLUMINATORS_1:
+ return cpia2_set_gpio(cam, (cam->top_light->val << 6) |
+ (cam->bottom_light->val << 7));
+ case V4L2_CID_JPEG_ACTIVE_MARKER:
+ cam->params.compression.inhibit_htables =
+ !(ctrl->val & V4L2_JPEG_ACTIVE_MARKER_DHT);
+ break;
+ case V4L2_CID_JPEG_COMPRESSION_QUALITY:
+ cam->params.vc_params.quality = ctrl->val;
+ break;
+ case CPIA2_CID_USB_ALT:
+ cam->params.camera_state.stream_mode = ctrl->val;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_g_jpegcomp
+ *
+ * V4L2 get the JPEG compression parameters
+ *
+ *****************************************************************************/
+
+static int cpia2_g_jpegcomp(struct file *file, void *fh, struct v4l2_jpegcompression *parms)
+{
+ struct camera_data *cam = video_drvdata(file);
+
+ memset(parms, 0, sizeof(*parms));
+
+ parms->quality = 80; // TODO: Can this be made meaningful?
+
+ parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI;
+ if(!cam->params.compression.inhibit_htables) {
+ parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT;
+ }
+
+ parms->APPn = cam->APPn;
+ parms->APP_len = cam->APP_len;
+ if(cam->APP_len > 0) {
+ memcpy(parms->APP_data, cam->APP_data, cam->APP_len);
+ parms->jpeg_markers |= V4L2_JPEG_MARKER_APP;
+ }
+
+ parms->COM_len = cam->COM_len;
+ if(cam->COM_len > 0) {
+ memcpy(parms->COM_data, cam->COM_data, cam->COM_len);
+ parms->jpeg_markers |= JPEG_MARKER_COM;
+ }
+
+ DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n",
+ parms->APP_len, parms->COM_len);
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_s_jpegcomp
+ *
+ * V4L2 set the JPEG compression parameters
+ * NOTE: quality and some jpeg_markers are ignored.
+ *
+ *****************************************************************************/
+
+static int cpia2_s_jpegcomp(struct file *file, void *fh,
+ const struct v4l2_jpegcompression *parms)
+{
+ struct camera_data *cam = video_drvdata(file);
+
+ DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n",
+ parms->APP_len, parms->COM_len);
+
+ cam->params.compression.inhibit_htables =
+ !(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT);
+
+ if(parms->APP_len != 0) {
+ if(parms->APP_len > 0 &&
+ parms->APP_len <= sizeof(cam->APP_data) &&
+ parms->APPn >= 0 && parms->APPn <= 15) {
+ cam->APPn = parms->APPn;
+ cam->APP_len = parms->APP_len;
+ memcpy(cam->APP_data, parms->APP_data, parms->APP_len);
+ } else {
+ LOG("Bad APPn Params n=%d len=%d\n",
+ parms->APPn, parms->APP_len);
+ return -EINVAL;
+ }
+ } else {
+ cam->APP_len = 0;
+ }
+
+ if(parms->COM_len != 0) {
+ if(parms->COM_len > 0 &&
+ parms->COM_len <= sizeof(cam->COM_data)) {
+ cam->COM_len = parms->COM_len;
+ memcpy(cam->COM_data, parms->COM_data, parms->COM_len);
+ } else {
+ LOG("Bad COM_len=%d\n", parms->COM_len);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_reqbufs
+ *
+ * V4L2 Initiate memory mapping.
+ * NOTE: The user's request is ignored. For now the buffers are fixed.
+ *
+ *****************************************************************************/
+
+static int cpia2_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *req)
+{
+ struct camera_data *cam = video_drvdata(file);
+
+ if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
+ req->memory != V4L2_MEMORY_MMAP)
+ return -EINVAL;
+
+ DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames);
+ req->count = cam->num_frames;
+ memset(&req->reserved, 0, sizeof(req->reserved));
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_querybuf
+ *
+ * V4L2 Query memory buffer status.
+ *
+ *****************************************************************************/
+
+static int cpia2_querybuf(struct file *file, void *fh, struct v4l2_buffer *buf)
+{
+ struct camera_data *cam = video_drvdata(file);
+
+ if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
+ buf->index > cam->num_frames)
+ return -EINVAL;
+
+ buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
+ buf->length = cam->frame_size;
+
+ buf->memory = V4L2_MEMORY_MMAP;
+
+ if(cam->mmapped)
+ buf->flags = V4L2_BUF_FLAG_MAPPED;
+ else
+ buf->flags = 0;
+
+ buf->flags |= V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+
+ switch (cam->buffers[buf->index].status) {
+ case FRAME_EMPTY:
+ case FRAME_ERROR:
+ case FRAME_READING:
+ buf->bytesused = 0;
+ buf->flags = V4L2_BUF_FLAG_QUEUED;
+ break;
+ case FRAME_READY:
+ buf->bytesused = cam->buffers[buf->index].length;
+ buf->timestamp = cam->buffers[buf->index].timestamp;
+ buf->sequence = cam->buffers[buf->index].seq;
+ buf->flags = V4L2_BUF_FLAG_DONE;
+ break;
+ }
+
+ DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n",
+ buf->index, buf->m.offset, buf->flags, buf->sequence,
+ buf->bytesused);
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_qbuf
+ *
+ * V4L2 User is freeing buffer
+ *
+ *****************************************************************************/
+
+static int cpia2_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
+{
+ struct camera_data *cam = video_drvdata(file);
+
+ if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
+ buf->memory != V4L2_MEMORY_MMAP ||
+ buf->index > cam->num_frames)
+ return -EINVAL;
+
+ DBG("QBUF #%d\n", buf->index);
+
+ if(cam->buffers[buf->index].status == FRAME_READY)
+ cam->buffers[buf->index].status = FRAME_EMPTY;
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * find_earliest_filled_buffer
+ *
+ * Helper for ioctl_dqbuf. Find the next ready buffer.
+ *
+ *****************************************************************************/
+
+static int find_earliest_filled_buffer(struct camera_data *cam)
+{
+ int i;
+ int found = -1;
+ for (i=0; i<cam->num_frames; i++) {
+ if(cam->buffers[i].status == FRAME_READY) {
+ if(found < 0) {
+ found = i;
+ } else {
+ /* find which buffer is earlier */
+ struct timeval *tv1, *tv2;
+ tv1 = &cam->buffers[i].timestamp;
+ tv2 = &cam->buffers[found].timestamp;
+ if(tv1->tv_sec < tv2->tv_sec ||
+ (tv1->tv_sec == tv2->tv_sec &&
+ tv1->tv_usec < tv2->tv_usec))
+ found = i;
+ }
+ }
+ }
+ return found;
+}
+
+/******************************************************************************
+ *
+ * ioctl_dqbuf
+ *
+ * V4L2 User is asking for a filled buffer.
+ *
+ *****************************************************************************/
+
+static int cpia2_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
+{
+ struct camera_data *cam = video_drvdata(file);
+ int frame;
+
+ if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
+ buf->memory != V4L2_MEMORY_MMAP)
+ return -EINVAL;
+
+ frame = find_earliest_filled_buffer(cam);
+
+ if(frame < 0 && file->f_flags&O_NONBLOCK)
+ return -EAGAIN;
+
+ if(frame < 0) {
+ /* Wait for a frame to become available */
+ struct framebuf *cb=cam->curbuff;
+ mutex_unlock(&cam->v4l2_lock);
+ wait_event_interruptible(cam->wq_stream,
+ !video_is_registered(&cam->vdev) ||
+ (cb=cam->curbuff)->status == FRAME_READY);
+ mutex_lock(&cam->v4l2_lock);
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+ if (!video_is_registered(&cam->vdev))
+ return -ENOTTY;
+ frame = cb->num;
+ }
+
+
+ buf->index = frame;
+ buf->bytesused = cam->buffers[buf->index].length;
+ buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE
+ | V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ buf->field = V4L2_FIELD_NONE;
+ buf->timestamp = cam->buffers[buf->index].timestamp;
+ buf->sequence = cam->buffers[buf->index].seq;
+ buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer;
+ buf->length = cam->frame_size;
+ buf->reserved2 = 0;
+ buf->reserved = 0;
+ memset(&buf->timecode, 0, sizeof(buf->timecode));
+
+ DBG("DQBUF #%d status:%d seq:%d length:%d\n", buf->index,
+ cam->buffers[buf->index].status, buf->sequence, buf->bytesused);
+
+ return 0;
+}
+
+static int cpia2_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
+{
+ struct camera_data *cam = video_drvdata(file);
+ int ret = -EINVAL;
+
+ DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming);
+ if (!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ if (!cam->streaming) {
+ ret = cpia2_usb_stream_start(cam,
+ cam->params.camera_state.stream_mode);
+ if (!ret)
+ v4l2_ctrl_grab(cam->usb_alt, true);
+ }
+ return ret;
+}
+
+static int cpia2_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
+{
+ struct camera_data *cam = video_drvdata(file);
+ int ret = -EINVAL;
+
+ DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming);
+ if (!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ if (cam->streaming) {
+ ret = cpia2_usb_stream_stop(cam);
+ if (!ret)
+ v4l2_ctrl_grab(cam->usb_alt, false);
+ }
+ return ret;
+}
+
+/******************************************************************************
+ *
+ * cpia2_mmap
+ *
+ *****************************************************************************/
+static int cpia2_mmap(struct file *file, struct vm_area_struct *area)
+{
+ struct camera_data *cam = video_drvdata(file);
+ int retval;
+
+ if (mutex_lock_interruptible(&cam->v4l2_lock))
+ return -ERESTARTSYS;
+ retval = cpia2_remap_buffer(cam, area);
+
+ if(!retval)
+ cam->stream_fh = file->private_data;
+ mutex_unlock(&cam->v4l2_lock);
+ return retval;
+}
+
+/******************************************************************************
+ *
+ * reset_camera_struct_v4l
+ *
+ * Sets all values to the defaults
+ *****************************************************************************/
+static void reset_camera_struct_v4l(struct camera_data *cam)
+{
+ cam->width = cam->params.roi.width;
+ cam->height = cam->params.roi.height;
+
+ cam->frame_size = buffer_size;
+ cam->num_frames = num_buffers;
+
+ /* Flicker modes */
+ cam->params.flicker_control.flicker_mode_req = flicker_mode;
+
+ /* stream modes */
+ cam->params.camera_state.stream_mode = alternate;
+
+ cam->pixelformat = V4L2_PIX_FMT_JPEG;
+}
+
+static const struct v4l2_ioctl_ops cpia2_ioctl_ops = {
+ .vidioc_querycap = cpia2_querycap,
+ .vidioc_enum_input = cpia2_enum_input,
+ .vidioc_g_input = cpia2_g_input,
+ .vidioc_s_input = cpia2_s_input,
+ .vidioc_enum_fmt_vid_cap = cpia2_enum_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = cpia2_g_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = cpia2_s_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = cpia2_try_fmt_vid_cap,
+ .vidioc_g_jpegcomp = cpia2_g_jpegcomp,
+ .vidioc_s_jpegcomp = cpia2_s_jpegcomp,
+ .vidioc_cropcap = cpia2_cropcap,
+ .vidioc_reqbufs = cpia2_reqbufs,
+ .vidioc_querybuf = cpia2_querybuf,
+ .vidioc_qbuf = cpia2_qbuf,
+ .vidioc_dqbuf = cpia2_dqbuf,
+ .vidioc_streamon = cpia2_streamon,
+ .vidioc_streamoff = cpia2_streamoff,
+ .vidioc_s_parm = cpia2_s_parm,
+ .vidioc_g_parm = cpia2_g_parm,
+ .vidioc_enum_framesizes = cpia2_enum_framesizes,
+ .vidioc_enum_frameintervals = cpia2_enum_frameintervals,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+/***
+ * The v4l video device structure initialized for this device
+ ***/
+static const struct v4l2_file_operations cpia2_fops = {
+ .owner = THIS_MODULE,
+ .open = cpia2_open,
+ .release = cpia2_close,
+ .read = cpia2_v4l_read,
+ .poll = cpia2_v4l_poll,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = cpia2_mmap,
+};
+
+static struct video_device cpia2_template = {
+ /* I could not find any place for the old .initialize initializer?? */
+ .name = "CPiA2 Camera",
+ .fops = &cpia2_fops,
+ .ioctl_ops = &cpia2_ioctl_ops,
+ .release = video_device_release_empty,
+};
+
+void cpia2_camera_release(struct v4l2_device *v4l2_dev)
+{
+ struct camera_data *cam =
+ container_of(v4l2_dev, struct camera_data, v4l2_dev);
+
+ v4l2_ctrl_handler_free(&cam->hdl);
+ v4l2_device_unregister(&cam->v4l2_dev);
+ kfree(cam);
+}
+
+static const struct v4l2_ctrl_ops cpia2_ctrl_ops = {
+ .s_ctrl = cpia2_s_ctrl,
+};
+
+/******************************************************************************
+ *
+ * cpia2_register_camera
+ *
+ *****************************************************************************/
+int cpia2_register_camera(struct camera_data *cam)
+{
+ struct v4l2_ctrl_handler *hdl = &cam->hdl;
+ struct v4l2_ctrl_config cpia2_usb_alt = {
+ .ops = &cpia2_ctrl_ops,
+ .id = CPIA2_CID_USB_ALT,
+ .name = "USB Alternate",
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .min = USBIF_ISO_1,
+ .max = USBIF_ISO_6,
+ .step = 1,
+ };
+ int ret;
+
+ v4l2_ctrl_handler_init(hdl, 12);
+ v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
+ V4L2_CID_BRIGHTNESS,
+ cam->params.pnp_id.device_type == DEVICE_STV_672 ? 1 : 0,
+ 255, 1, DEFAULT_BRIGHTNESS);
+ v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
+ V4L2_CID_CONTRAST, 0, 255, 1, DEFAULT_CONTRAST);
+ v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
+ V4L2_CID_SATURATION, 0, 255, 1, DEFAULT_SATURATION);
+ v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
+ V4L2_CID_HFLIP, 0, 1, 1, 0);
+ v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
+ V4L2_CID_JPEG_ACTIVE_MARKER, 0,
+ V4L2_JPEG_ACTIVE_MARKER_DHT, 0,
+ V4L2_JPEG_ACTIVE_MARKER_DHT);
+ v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
+ V4L2_CID_JPEG_COMPRESSION_QUALITY, 1,
+ 100, 1, 100);
+ cpia2_usb_alt.def = alternate;
+ cam->usb_alt = v4l2_ctrl_new_custom(hdl, &cpia2_usb_alt, NULL);
+ /* VP5 Only */
+ if (cam->params.pnp_id.device_type != DEVICE_STV_672)
+ v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
+ V4L2_CID_VFLIP, 0, 1, 1, 0);
+ /* Flicker control only valid for 672 */
+ if (cam->params.pnp_id.device_type == DEVICE_STV_672)
+ v4l2_ctrl_new_std_menu(hdl, &cpia2_ctrl_ops,
+ V4L2_CID_POWER_LINE_FREQUENCY,
+ V4L2_CID_POWER_LINE_FREQUENCY_60HZ, 0, 0);
+ /* Light control only valid for the QX5 Microscope */
+ if (cam->params.pnp_id.product == 0x151) {
+ cam->top_light = v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
+ V4L2_CID_ILLUMINATORS_1, 0, 1, 1, 0);
+ cam->bottom_light = v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops,
+ V4L2_CID_ILLUMINATORS_2, 0, 1, 1, 0);
+ v4l2_ctrl_cluster(2, &cam->top_light);
+ }
+
+ if (hdl->error) {
+ ret = hdl->error;
+ v4l2_ctrl_handler_free(hdl);
+ return ret;
+ }
+
+ cam->vdev = cpia2_template;
+ video_set_drvdata(&cam->vdev, cam);
+ cam->vdev.lock = &cam->v4l2_lock;
+ cam->vdev.ctrl_handler = hdl;
+ cam->vdev.v4l2_dev = &cam->v4l2_dev;
+
+ reset_camera_struct_v4l(cam);
+
+ /* register v4l device */
+ if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
+ ERR("video_register_device failed\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * cpia2_unregister_camera
+ *
+ *****************************************************************************/
+void cpia2_unregister_camera(struct camera_data *cam)
+{
+ video_unregister_device(&cam->vdev);
+}
+
+/******************************************************************************
+ *
+ * check_parameters
+ *
+ * Make sure that all user-supplied parameters are sensible
+ *****************************************************************************/
+static void __init check_parameters(void)
+{
+ if(buffer_size < PAGE_SIZE) {
+ buffer_size = PAGE_SIZE;
+ LOG("buffer_size too small, setting to %d\n", buffer_size);
+ } else if(buffer_size > 1024*1024) {
+ /* arbitrary upper limiit */
+ buffer_size = 1024*1024;
+ LOG("buffer_size ridiculously large, setting to %d\n",
+ buffer_size);
+ } else {
+ buffer_size += PAGE_SIZE-1;
+ buffer_size &= ~(PAGE_SIZE-1);
+ }
+
+ if(num_buffers < 1) {
+ num_buffers = 1;
+ LOG("num_buffers too small, setting to %d\n", num_buffers);
+ } else if(num_buffers > VIDEO_MAX_FRAME) {
+ num_buffers = VIDEO_MAX_FRAME;
+ LOG("num_buffers too large, setting to %d\n", num_buffers);
+ }
+
+ if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) {
+ alternate = DEFAULT_ALT;
+ LOG("alternate specified is invalid, using %d\n", alternate);
+ }
+
+ if (flicker_mode != 0 && flicker_mode != FLICKER_50 && flicker_mode != FLICKER_60) {
+ flicker_mode = 0;
+ LOG("Flicker mode specified is invalid, using %d\n",
+ flicker_mode);
+ }
+
+ DBG("Using %d buffers, each %d bytes, alternate=%d\n",
+ num_buffers, buffer_size, alternate);
+}
+
+/************ Module Stuff ***************/
+
+
+/******************************************************************************
+ *
+ * cpia2_init/module_init
+ *
+ *****************************************************************************/
+static int __init cpia2_init(void)
+{
+ LOG("%s v%s\n",
+ ABOUT, CPIA_VERSION);
+ check_parameters();
+ cpia2_usb_init();
+ return 0;
+}
+
+
+/******************************************************************************
+ *
+ * cpia2_exit/module_exit
+ *
+ *****************************************************************************/
+static void __exit cpia2_exit(void)
+{
+ cpia2_usb_cleanup();
+ schedule_timeout(2 * HZ);
+}
+
+module_init(cpia2_init);
+module_exit(cpia2_exit);
Code Review / kvmfornfv.git / blobdiff