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authorAlan Cox <alan@redhat.com>2006-02-27 00:09:05 -0300
committerMauro Carvalho Chehab <mchehab@infradead.org>2006-02-27 00:09:05 -0300
commitab33d5071de7a33616842882c11b5eb52a6c26a1 (patch)
tree5484a1a0d671e7191a47a1b51d5e1ae67fc8916f /drivers/media/video/cpia2/cpia2_v4l.c
parentf05cce863fa399dd79c5aa3896d608b8b86d8030 (diff)
V4L/DVB (3376): Add cpia2 camera support
There has been a CPIA2 driver out of kernel for a long time and it has been pretty clean for some time too. This is an import of the sourceforge driver which has been stripped of - 2.4 back compatibility - 2.4 old style MJPEG ioctls A couple of functions have been made static and the docs have been repackaged into Documentation/video4linux. The rvmalloc/free functions now match the cpia driver again. Other than that this is the code as is. Tested on x86-64 with a QX5 microscope. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/cpia2/cpia2_v4l.c')
-rw-r--r--drivers/media/video/cpia2/cpia2_v4l.c2104
1 files changed, 2104 insertions, 0 deletions
diff --git a/drivers/media/video/cpia2/cpia2_v4l.c b/drivers/media/video/cpia2/cpia2_v4l.c
new file mode 100644
index 00000000000..3480a2ca7cd
--- /dev/null
+++ b/drivers/media/video/cpia2/cpia2_v4l.c
@@ -0,0 +1,2104 @@
+/****************************************************************************
+ *
+ * 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@redhat.com>
+ ****************************************************************************/
+
+#include <linux/version.h>
+
+#include <linux/config.h>
+
+#include <linux/module.h>
+#include <linux/time.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/moduleparam.h>
+
+#include "cpia2.h"
+#include "cpia2dev.h"
+
+
+//#define _CPIA2_DEBUG_
+
+#define MAKE_STRING_1(x) #x
+#define MAKE_STRING(x) MAKE_STRING_1(x)
+
+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-"
+ MAKE_STRING(VIDEO_MAX_FRAME) ", default 3)");
+
+static int alternate = DEFAULT_ALT;
+module_param(alternate, int, 0);
+MODULE_PARM_DESC(alternate, "USB Alternate (" MAKE_STRING(USBIF_ISO_1) "-"
+ MAKE_STRING(USBIF_ISO_6) ", default "
+ MAKE_STRING(DEFAULT_ALT) ")");
+
+static int flicker_freq = 60;
+module_param(flicker_freq, int, 0);
+MODULE_PARM_DESC(flicker_freq, "Flicker frequency (" MAKE_STRING(50) "or"
+ MAKE_STRING(60) ", default "
+ MAKE_STRING(60) ")");
+
+static int flicker_mode = NEVER_FLICKER;
+module_param(flicker_mode, int, 0);
+MODULE_PARM_DESC(flicker_mode,
+ "Flicker supression (" MAKE_STRING(NEVER_FLICKER) "or"
+ MAKE_STRING(ANTI_FLICKER_ON) ", default "
+ MAKE_STRING(NEVER_FLICKER) ")");
+
+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");
+
+#define ABOUT "V4L-Driver for Vision CPiA2 based cameras"
+
+#ifndef VID_HARDWARE_CPIA2
+#error "VID_HARDWARE_CPIA2 should have been defined in linux/videodev.h"
+#endif
+
+struct control_menu_info {
+ int value;
+ char name[32];
+};
+
+static struct control_menu_info framerate_controls[] =
+{
+ { CPIA2_VP_FRAMERATE_6_25, "6.25 fps" },
+ { CPIA2_VP_FRAMERATE_7_5, "7.5 fps" },
+ { CPIA2_VP_FRAMERATE_12_5, "12.5 fps" },
+ { CPIA2_VP_FRAMERATE_15, "15 fps" },
+ { CPIA2_VP_FRAMERATE_25, "25 fps" },
+ { CPIA2_VP_FRAMERATE_30, "30 fps" },
+};
+#define NUM_FRAMERATE_CONTROLS (sizeof(framerate_controls)/sizeof(framerate_controls[0]))
+
+static struct control_menu_info flicker_controls[] =
+{
+ { NEVER_FLICKER, "Off" },
+ { FLICKER_50, "50 Hz" },
+ { FLICKER_60, "60 Hz" },
+};
+#define NUM_FLICKER_CONTROLS (sizeof(flicker_controls)/sizeof(flicker_controls[0]))
+
+static struct control_menu_info lights_controls[] =
+{
+ { 0, "Off" },
+ { 64, "Top" },
+ { 128, "Bottom" },
+ { 192, "Both" },
+};
+#define NUM_LIGHTS_CONTROLS (sizeof(lights_controls)/sizeof(lights_controls[0]))
+#define GPIO_LIGHTS_MASK 192
+
+static struct v4l2_queryctrl controls[] = {
+ {
+ .id = V4L2_CID_BRIGHTNESS,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Brightness",
+ .minimum = 0,
+ .maximum = 255,
+ .step = 1,
+ .default_value = DEFAULT_BRIGHTNESS,
+ },
+ {
+ .id = V4L2_CID_CONTRAST,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Contrast",
+ .minimum = 0,
+ .maximum = 255,
+ .step = 1,
+ .default_value = DEFAULT_CONTRAST,
+ },
+ {
+ .id = V4L2_CID_SATURATION,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Saturation",
+ .minimum = 0,
+ .maximum = 255,
+ .step = 1,
+ .default_value = DEFAULT_SATURATION,
+ },
+ {
+ .id = V4L2_CID_HFLIP,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Mirror Horizontally",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 0,
+ },
+ {
+ .id = V4L2_CID_VFLIP,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Flip Vertically",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 0,
+ },
+ {
+ .id = CPIA2_CID_TARGET_KB,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Target KB",
+ .minimum = 0,
+ .maximum = 255,
+ .step = 1,
+ .default_value = DEFAULT_TARGET_KB,
+ },
+ {
+ .id = CPIA2_CID_GPIO,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "GPIO",
+ .minimum = 0,
+ .maximum = 255,
+ .step = 1,
+ .default_value = 0,
+ },
+ {
+ .id = CPIA2_CID_FLICKER_MODE,
+ .type = V4L2_CTRL_TYPE_MENU,
+ .name = "Flicker Reduction",
+ .minimum = 0,
+ .maximum = NUM_FLICKER_CONTROLS-1,
+ .step = 1,
+ .default_value = 0,
+ },
+ {
+ .id = CPIA2_CID_FRAMERATE,
+ .type = V4L2_CTRL_TYPE_MENU,
+ .name = "Framerate",
+ .minimum = 0,
+ .maximum = NUM_FRAMERATE_CONTROLS-1,
+ .step = 1,
+ .default_value = NUM_FRAMERATE_CONTROLS-1,
+ },
+ {
+ .id = CPIA2_CID_USB_ALT,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "USB Alternate",
+ .minimum = USBIF_ISO_1,
+ .maximum = USBIF_ISO_6,
+ .step = 1,
+ .default_value = DEFAULT_ALT,
+ },
+ {
+ .id = CPIA2_CID_LIGHTS,
+ .type = V4L2_CTRL_TYPE_MENU,
+ .name = "Lights",
+ .minimum = 0,
+ .maximum = NUM_LIGHTS_CONTROLS-1,
+ .step = 1,
+ .default_value = 0,
+ },
+ {
+ .id = CPIA2_CID_RESET_CAMERA,
+ .type = V4L2_CTRL_TYPE_BUTTON,
+ .name = "Reset Camera",
+ .minimum = 0,
+ .maximum = 0,
+ .step = 0,
+ .default_value = 0,
+ },
+};
+#define NUM_CONTROLS (sizeof(controls)/sizeof(controls[0]))
+
+
+/******************************************************************************
+ *
+ * cpia2_open
+ *
+ *****************************************************************************/
+static int cpia2_open(struct inode *inode, struct file *file)
+{
+ struct video_device *dev = video_devdata(file);
+ struct camera_data *cam = video_get_drvdata(dev);
+ int retval = 0;
+
+ if (!cam) {
+ ERR("Internal error, camera_data not found!\n");
+ return -ENODEV;
+ }
+
+ if(down_interruptible(&cam->busy_lock))
+ return -ERESTARTSYS;
+
+ if(!cam->present) {
+ retval = -ENODEV;
+ goto err_return;
+ }
+
+ if (cam->open_count > 0) {
+ goto skip_init;
+ }
+
+ if (cpia2_allocate_buffers(cam)) {
+ retval = -ENOMEM;
+ goto err_return;
+ }
+
+ /* reset the camera */
+ if (cpia2_reset_camera(cam) < 0) {
+ retval = -EIO;
+ goto err_return;
+ }
+
+ cam->APP_len = 0;
+ cam->COM_len = 0;
+
+skip_init:
+ {
+ struct cpia2_fh *fh = kmalloc(sizeof(*fh),GFP_KERNEL);
+ if(!fh) {
+ retval = -ENOMEM;
+ goto err_return;
+ }
+ file->private_data = fh;
+ fh->prio = V4L2_PRIORITY_UNSET;
+ v4l2_prio_open(&cam->prio, &fh->prio);
+ fh->mmapped = 0;
+ }
+
+ ++cam->open_count;
+
+ cpia2_dbg_dump_registers(cam);
+
+err_return:
+ up(&cam->busy_lock);
+ return retval;
+}
+
+/******************************************************************************
+ *
+ * cpia2_close
+ *
+ *****************************************************************************/
+static int cpia2_close(struct inode *inode, struct file *file)
+{
+ struct video_device *dev = video_devdata(file);
+ struct camera_data *cam = video_get_drvdata(dev);
+ struct cpia2_fh *fh = file->private_data;
+
+ down(&cam->busy_lock);
+
+ if (cam->present &&
+ (cam->open_count == 1
+ || fh->prio == V4L2_PRIORITY_RECORD
+ )) {
+ cpia2_usb_stream_stop(cam);
+
+ if(cam->open_count == 1) {
+ /* save camera state for later open */
+ cpia2_save_camera_state(cam);
+
+ cpia2_set_low_power(cam);
+ cpia2_free_buffers(cam);
+ }
+ }
+
+ {
+ if(fh->mmapped)
+ cam->mmapped = 0;
+ v4l2_prio_close(&cam->prio,&fh->prio);
+ file->private_data = NULL;
+ kfree(fh);
+ }
+
+ if (--cam->open_count == 0) {
+ cpia2_free_buffers(cam);
+ if (!cam->present) {
+ video_unregister_device(dev);
+ kfree(cam);
+ }
+ }
+
+ up(&cam->busy_lock);
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * cpia2_v4l_read
+ *
+ *****************************************************************************/
+static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count,
+ loff_t *off)
+{
+ struct video_device *dev = video_devdata(file);
+ struct camera_data *cam = video_get_drvdata(dev);
+ int noblock = file->f_flags&O_NONBLOCK;
+
+ struct cpia2_fh *fh = file->private_data;
+
+ if(!cam)
+ return -EINVAL;
+
+ /* Priority check */
+ if(fh->prio != V4L2_PRIORITY_RECORD) {
+ return -EBUSY;
+ }
+
+ return cpia2_read(cam, buf, count, noblock);
+}
+
+
+/******************************************************************************
+ *
+ * cpia2_v4l_poll
+ *
+ *****************************************************************************/
+static unsigned int cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait)
+{
+ struct video_device *dev = video_devdata(filp);
+ struct camera_data *cam = video_get_drvdata(dev);
+
+ struct cpia2_fh *fh = filp->private_data;
+
+ if(!cam)
+ return POLLERR;
+
+ /* Priority check */
+ if(fh->prio != V4L2_PRIORITY_RECORD) {
+ return POLLERR;
+ }
+
+ return cpia2_poll(cam, filp, wait);
+}
+
+
+/******************************************************************************
+ *
+ * ioctl_cap_query
+ *
+ *****************************************************************************/
+static int ioctl_cap_query(void *arg, struct camera_data *cam)
+{
+ struct video_capability *vc;
+ int retval = 0;
+ vc = arg;
+
+ if (cam->params.pnp_id.product == 0x151)
+ strcpy(vc->name, "QX5 Microscope");
+ else
+ strcpy(vc->name, "CPiA2 Camera");
+
+ vc->type = VID_TYPE_CAPTURE | VID_TYPE_MJPEG_ENCODER;
+ vc->channels = 1;
+ vc->audios = 0;
+ vc->minwidth = 176; /* VIDEOSIZE_QCIF */
+ vc->minheight = 144;
+ switch (cam->params.version.sensor_flags) {
+ case CPIA2_VP_SENSOR_FLAGS_500:
+ vc->maxwidth = STV_IMAGE_VGA_COLS;
+ vc->maxheight = STV_IMAGE_VGA_ROWS;
+ break;
+ case CPIA2_VP_SENSOR_FLAGS_410:
+ vc->maxwidth = STV_IMAGE_CIF_COLS;
+ vc->maxheight = STV_IMAGE_CIF_ROWS;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return retval;
+}
+
+/******************************************************************************
+ *
+ * ioctl_get_channel
+ *
+ *****************************************************************************/
+static int ioctl_get_channel(void *arg)
+{
+ int retval = 0;
+ struct video_channel *v;
+ v = arg;
+
+ if (v->channel != 0)
+ return -EINVAL;
+
+ v->channel = 0;
+ strcpy(v->name, "Camera");
+ v->tuners = 0;
+ v->flags = 0;
+ v->type = VIDEO_TYPE_CAMERA;
+ v->norm = 0;
+
+ return retval;
+}
+
+/******************************************************************************
+ *
+ * ioctl_set_channel
+ *
+ *****************************************************************************/
+static int ioctl_set_channel(void *arg)
+{
+ struct video_channel *v;
+ int retval = 0;
+ v = arg;
+
+ if (retval == 0 && v->channel != 0)
+ retval = -EINVAL;
+
+ return retval;
+}
+
+/******************************************************************************
+ *
+ * ioctl_set_image_prop
+ *
+ *****************************************************************************/
+static int ioctl_set_image_prop(void *arg, struct camera_data *cam)
+{
+ struct video_picture *vp;
+ int retval = 0;
+ vp = arg;
+
+ /* brightness, color, contrast need no check 0-65535 */
+ memcpy(&cam->vp, vp, sizeof(*vp));
+
+ /* update cam->params.colorParams */
+ cam->params.color_params.brightness = vp->brightness / 256;
+ cam->params.color_params.saturation = vp->colour / 256;
+ cam->params.color_params.contrast = vp->contrast / 256;
+
+ DBG("Requested params: bright 0x%X, sat 0x%X, contrast 0x%X\n",
+ cam->params.color_params.brightness,
+ cam->params.color_params.saturation,
+ cam->params.color_params.contrast);
+
+ cpia2_set_color_params(cam);
+
+ return retval;
+}
+
+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;
+ }
+
+ up(&cam->busy_lock);
+ wait_event_interruptible(cam->wq_stream,
+ !cam->streaming ||
+ frame->status == FRAME_READY);
+ down(&cam->busy_lock);
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+ if(!cam->present)
+ return -ENOTTY;
+ }
+}
+
+/******************************************************************************
+ *
+ * ioctl_set_window_size
+ *
+ *****************************************************************************/
+static int ioctl_set_window_size(void *arg, struct camera_data *cam,
+ struct cpia2_fh *fh)
+{
+ /* copy_from_user, check validity, copy to internal structure */
+ struct video_window *vw;
+ int frame, err;
+ vw = arg;
+
+ if (vw->clipcount != 0) /* clipping not supported */
+ return -EINVAL;
+
+ if (vw->clips != NULL) /* clipping not supported */
+ return -EINVAL;
+
+ /* Ensure that only this process can change the format. */
+ err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
+ if(err != 0)
+ return err;
+
+ cam->pixelformat = V4L2_PIX_FMT_JPEG;
+
+ /* Be sure to supply the Huffman tables, this isn't MJPEG */
+ cam->params.compression.inhibit_htables = 0;
+
+ /* we set the video window to something smaller or equal to what
+ * is requested by the user???
+ */
+ DBG("Requested width = %d, height = %d\n", vw->width, vw->height);
+ if (vw->width != cam->vw.width || vw->height != cam->vw.height) {
+ cam->vw.width = vw->width;
+ cam->vw.height = vw->height;
+ cam->params.roi.width = vw->width;
+ cam->params.roi.height = vw->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_mbuf
+ *
+ *****************************************************************************/
+static int ioctl_get_mbuf(void *arg, struct camera_data *cam)
+{
+ struct video_mbuf *vm;
+ int i;
+ vm = arg;
+
+ memset(vm, 0, sizeof(*vm));
+ vm->size = cam->frame_size*cam->num_frames;
+ vm->frames = cam->num_frames;
+ for (i = 0; i < cam->num_frames; i++)
+ vm->offsets[i] = cam->frame_size * i;
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_mcapture
+ *
+ *****************************************************************************/
+static int ioctl_mcapture(void *arg, struct camera_data *cam,
+ struct cpia2_fh *fh)
+{
+ struct video_mmap *vm;
+ int video_size, err;
+ vm = arg;
+
+ if (vm->frame < 0 || vm->frame >= cam->num_frames)
+ return -EINVAL;
+
+ /* set video size */
+ video_size = cpia2_match_video_size(vm->width, vm->height);
+ if (cam->video_size < 0) {
+ return -EINVAL;
+ }
+
+ /* Ensure that only this process can change the format. */
+ err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
+ if(err != 0)
+ return err;
+
+ if (video_size != cam->video_size) {
+ cam->video_size = video_size;
+ cam->params.roi.width = vm->width;
+ cam->params.roi.height = vm->height;
+ cpia2_set_format(cam);
+ }
+
+ if (cam->buffers[vm->frame].status == FRAME_READING)
+ if ((err=sync(cam, vm->frame)) < 0)
+ return err;
+
+ cam->buffers[vm->frame].status = FRAME_EMPTY;
+
+ return cpia2_usb_stream_start(cam,cam->params.camera_state.stream_mode);
+}
+
+/******************************************************************************
+ *
+ * ioctl_sync
+ *
+ *****************************************************************************/
+static int ioctl_sync(void *arg, struct camera_data *cam)
+{
+ int frame;
+
+ frame = *(int*)arg;
+
+ if (frame < 0 || frame >= cam->num_frames)
+ return -EINVAL;
+
+ return sync(cam, frame);
+}
+
+
+/******************************************************************************
+ *
+ * ioctl_set_gpio
+ *
+ *****************************************************************************/
+
+static int ioctl_set_gpio(void *arg, struct camera_data *cam)
+{
+ __u32 gpio_val;
+
+ gpio_val = *(__u32*) arg;
+
+ if (gpio_val &~ 0xFFU)
+ return -EINVAL;
+
+ return cpia2_set_gpio(cam, (unsigned char)gpio_val);
+}
+
+/******************************************************************************
+ *
+ * ioctl_querycap
+ *
+ * V4L2 device capabilities
+ *
+ *****************************************************************************/
+
+static int ioctl_querycap(void *arg, struct camera_data *cam)
+{
+ struct v4l2_capability *vc = arg;
+
+ memset(vc, 0, sizeof(*vc));
+ 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, " (???/");
+ 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, "???)");
+ 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->version = KERNEL_VERSION(CPIA2_MAJ_VER, CPIA2_MIN_VER,
+ CPIA2_PATCH_VER);
+
+ vc->capabilities = V4L2_CAP_VIDEO_CAPTURE |
+ V4L2_CAP_READWRITE |
+ V4L2_CAP_STREAMING;
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_input
+ *
+ * V4L2 input get/set/enumerate
+ *
+ *****************************************************************************/
+
+static int ioctl_input(unsigned int ioclt_nr,void *arg,struct camera_data *cam)
+{
+ struct v4l2_input *i = arg;
+
+ if(ioclt_nr != VIDIOC_G_INPUT) {
+ if (i->index != 0)
+ return -EINVAL;
+ }
+
+ memset(i, 0, sizeof(*i));
+ strcpy(i->name, "Camera");
+ i->type = V4L2_INPUT_TYPE_CAMERA;
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_enum_fmt
+ *
+ * V4L2 format enumerate
+ *
+ *****************************************************************************/
+
+static int ioctl_enum_fmt(void *arg,struct camera_data *cam)
+{
+ struct v4l2_fmtdesc *f = arg;
+ 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 ioctl_try_fmt(void *arg,struct camera_data *cam)
+{
+ struct v4l2_format *f = arg;
+
+ if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ 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 ioctl_set_fmt(void *arg,struct camera_data *cam, struct cpia2_fh *fh)
+{
+ struct v4l2_format *f = arg;
+ int err, frame;
+
+ err = ioctl_try_fmt(arg, cam);
+ if(err != 0)
+ return err;
+
+ /* Ensure that only this process can change the format. */
+ err = v4l2_prio_change(&cam->prio, &fh->prio, V4L2_PRIORITY_RECORD);
+ 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->vw.width ||
+ f->fmt.pix.height != cam->vw.height) {
+ cam->vw.width = f->fmt.pix.width;
+ cam->vw.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 ioctl_get_fmt(void *arg,struct camera_data *cam)
+{
+ struct v4l2_format *f = arg;
+
+ if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ f->fmt.pix.width = cam->vw.width;
+ f->fmt.pix.height = cam->vw.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 ioctl_cropcap(void *arg,struct camera_data *cam)
+{
+ struct v4l2_cropcap *c = arg;
+
+ if (c->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ c->bounds.left = 0;
+ c->bounds.top = 0;
+ c->bounds.width = cam->vw.width;
+ c->bounds.height = cam->vw.height;
+ c->defrect.left = 0;
+ c->defrect.top = 0;
+ c->defrect.width = cam->vw.width;
+ c->defrect.height = cam->vw.height;
+ c->pixelaspect.numerator = 1;
+ c->pixelaspect.denominator = 1;
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_queryctrl
+ *
+ * V4L2 query possible control variables
+ *
+ *****************************************************************************/
+
+static int ioctl_queryctrl(void *arg,struct camera_data *cam)
+{
+ struct v4l2_queryctrl *c = arg;
+ int i;
+
+ for(i=0; i<NUM_CONTROLS; ++i) {
+ if(c->id == controls[i].id) {
+ memcpy(c, controls+i, sizeof(*c));
+ break;
+ }
+ }
+
+ if(i == NUM_CONTROLS)
+ return -EINVAL;
+
+ /* Some devices have additional limitations */
+ switch(c->id) {
+ case V4L2_CID_BRIGHTNESS:
+ /***
+ * Don't let the register be set to zero - bug in VP4
+ * flash of full brightness
+ ***/
+ if (cam->params.pnp_id.device_type == DEVICE_STV_672)
+ c->minimum = 1;
+ break;
+ case V4L2_CID_VFLIP:
+ // VP5 Only
+ if(cam->params.pnp_id.device_type == DEVICE_STV_672)
+ c->flags |= V4L2_CTRL_FLAG_DISABLED;
+ break;
+ case CPIA2_CID_FRAMERATE:
+ if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
+ cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
+ // Maximum 15fps
+ int i;
+ for(i=0; i<c->maximum; ++i) {
+ if(framerate_controls[i].value ==
+ CPIA2_VP_FRAMERATE_15) {
+ c->maximum = i;
+ c->default_value = i;
+ }
+ }
+ }
+ break;
+ case CPIA2_CID_FLICKER_MODE:
+ // Flicker control only valid for 672.
+ if(cam->params.pnp_id.device_type != DEVICE_STV_672)
+ c->flags |= V4L2_CTRL_FLAG_DISABLED;
+ break;
+ case CPIA2_CID_LIGHTS:
+ // Light control only valid for the QX5 Microscope.
+ if(cam->params.pnp_id.product != 0x151)
+ c->flags |= V4L2_CTRL_FLAG_DISABLED;
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_querymenu
+ *
+ * V4L2 query possible control variables
+ *
+ *****************************************************************************/
+
+static int ioctl_querymenu(void *arg,struct camera_data *cam)
+{
+ struct v4l2_querymenu *m = arg;
+
+ memset(m->name, 0, sizeof(m->name));
+ m->reserved = 0;
+
+ switch(m->id) {
+ case CPIA2_CID_FLICKER_MODE:
+ if(m->index < 0 || m->index >= NUM_FLICKER_CONTROLS)
+ return -EINVAL;
+
+ strcpy(m->name, flicker_controls[m->index].name);
+ break;
+ case CPIA2_CID_FRAMERATE:
+ {
+ int maximum = NUM_FRAMERATE_CONTROLS - 1;
+ if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
+ cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
+ // Maximum 15fps
+ int i;
+ for(i=0; i<maximum; ++i) {
+ if(framerate_controls[i].value ==
+ CPIA2_VP_FRAMERATE_15)
+ maximum = i;
+ }
+ }
+ if(m->index < 0 || m->index > maximum)
+ return -EINVAL;
+
+ strcpy(m->name, framerate_controls[m->index].name);
+ break;
+ }
+ case CPIA2_CID_LIGHTS:
+ if(m->index < 0 || m->index >= NUM_LIGHTS_CONTROLS)
+ return -EINVAL;
+
+ strcpy(m->name, lights_controls[m->index].name);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_g_ctrl
+ *
+ * V4L2 get the value of a control variable
+ *
+ *****************************************************************************/
+
+static int ioctl_g_ctrl(void *arg,struct camera_data *cam)
+{
+ struct v4l2_control *c = arg;
+
+ switch(c->id) {
+ case V4L2_CID_BRIGHTNESS:
+ cpia2_do_command(cam, CPIA2_CMD_GET_VP_BRIGHTNESS,
+ TRANSFER_READ, 0);
+ c->value = cam->params.color_params.brightness;
+ break;
+ case V4L2_CID_CONTRAST:
+ cpia2_do_command(cam, CPIA2_CMD_GET_CONTRAST,
+ TRANSFER_READ, 0);
+ c->value = cam->params.color_params.contrast;
+ break;
+ case V4L2_CID_SATURATION:
+ cpia2_do_command(cam, CPIA2_CMD_GET_VP_SATURATION,
+ TRANSFER_READ, 0);
+ c->value = cam->params.color_params.saturation;
+ break;
+ case V4L2_CID_HFLIP:
+ cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
+ TRANSFER_READ, 0);
+ c->value = (cam->params.vp_params.user_effects &
+ CPIA2_VP_USER_EFFECTS_MIRROR) != 0;
+ break;
+ case V4L2_CID_VFLIP:
+ cpia2_do_command(cam, CPIA2_CMD_GET_USER_EFFECTS,
+ TRANSFER_READ, 0);
+ c->value = (cam->params.vp_params.user_effects &
+ CPIA2_VP_USER_EFFECTS_FLIP) != 0;
+ break;
+ case CPIA2_CID_TARGET_KB:
+ c->value = cam->params.vc_params.target_kb;
+ break;
+ case CPIA2_CID_GPIO:
+ cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
+ TRANSFER_READ, 0);
+ c->value = cam->params.vp_params.gpio_data;
+ break;
+ case CPIA2_CID_FLICKER_MODE:
+ {
+ int i, mode;
+ cpia2_do_command(cam, CPIA2_CMD_GET_FLICKER_MODES,
+ TRANSFER_READ, 0);
+ if(cam->params.flicker_control.cam_register &
+ CPIA2_VP_FLICKER_MODES_NEVER_FLICKER) {
+ mode = NEVER_FLICKER;
+ } else {
+ if(cam->params.flicker_control.cam_register &
+ CPIA2_VP_FLICKER_MODES_50HZ) {
+ mode = FLICKER_50;
+ } else {
+ mode = FLICKER_60;
+ }
+ }
+ for(i=0; i<NUM_FLICKER_CONTROLS; i++) {
+ if(flicker_controls[i].value == mode) {
+ c->value = i;
+ break;
+ }
+ }
+ if(i == NUM_FLICKER_CONTROLS)
+ return -EINVAL;
+ break;
+ }
+ case CPIA2_CID_FRAMERATE:
+ {
+ int maximum = NUM_FRAMERATE_CONTROLS - 1;
+ int i;
+ for(i=0; i<= maximum; i++) {
+ if(cam->params.vp_params.frame_rate ==
+ framerate_controls[i].value)
+ break;
+ }
+ if(i > maximum)
+ return -EINVAL;
+ c->value = i;
+ break;
+ }
+ case CPIA2_CID_USB_ALT:
+ c->value = cam->params.camera_state.stream_mode;
+ break;
+ case CPIA2_CID_LIGHTS:
+ {
+ int i;
+ cpia2_do_command(cam, CPIA2_CMD_GET_VP_GPIO_DATA,
+ TRANSFER_READ, 0);
+ for(i=0; i<NUM_LIGHTS_CONTROLS; i++) {
+ if((cam->params.vp_params.gpio_data&GPIO_LIGHTS_MASK) ==
+ lights_controls[i].value) {
+ break;
+ }
+ }
+ if(i == NUM_LIGHTS_CONTROLS)
+ return -EINVAL;
+ c->value = i;
+ break;
+ }
+ case CPIA2_CID_RESET_CAMERA:
+ return -EINVAL;
+ default:
+ return -EINVAL;
+ }
+
+ DBG("Get control id:%d, value:%d\n", c->id, c->value);
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * ioctl_s_ctrl
+ *
+ * V4L2 set the value of a control variable
+ *
+ *****************************************************************************/
+
+static int ioctl_s_ctrl(void *arg,struct camera_data *cam)
+{
+ struct v4l2_control *c = arg;
+ int i;
+ int retval = 0;
+
+ DBG("Set control id:%d, value:%d\n", c->id, c->value);
+
+ /* Check that the value is in range */
+ for(i=0; i<NUM_CONTROLS; i++) {
+ if(c->id == controls[i].id) {
+ if(c->value < controls[i].minimum ||
+ c->value > controls[i].maximum) {
+ return -EINVAL;
+ }
+ break;
+ }
+ }
+ if(i == NUM_CONTROLS)
+ return -EINVAL;
+
+ switch(c->id) {
+ case V4L2_CID_BRIGHTNESS:
+ cpia2_set_brightness(cam, c->value);
+ break;
+ case V4L2_CID_CONTRAST:
+ cpia2_set_contrast(cam, c->value);
+ break;
+ case V4L2_CID_SATURATION:
+ cpia2_set_saturation(cam, c->value);
+ break;
+ case V4L2_CID_HFLIP:
+ cpia2_set_property_mirror(cam, c->value);
+ break;
+ case V4L2_CID_VFLIP:
+ cpia2_set_property_flip(cam, c->value);
+ break;
+ case CPIA2_CID_TARGET_KB:
+ retval = cpia2_set_target_kb(cam, c->value);
+ break;
+ case CPIA2_CID_GPIO:
+ retval = cpia2_set_gpio(cam, c->value);
+ break;
+ case CPIA2_CID_FLICKER_MODE:
+ retval = cpia2_set_flicker_mode(cam,
+ flicker_controls[c->value].value);
+ break;
+ case CPIA2_CID_FRAMERATE:
+ retval = cpia2_set_fps(cam, framerate_controls[c->value].value);
+ break;
+ case CPIA2_CID_USB_ALT:
+ retval = cpia2_usb_change_streaming_alternate(cam, c->value);
+ break;
+ case CPIA2_CID_LIGHTS:
+ retval = cpia2_set_gpio(cam, lights_controls[c->value].value);
+ break;
+ case CPIA2_CID_RESET_CAMERA:
+ cpia2_usb_stream_pause(cam);
+ cpia2_reset_camera(cam);
+ cpia2_usb_stream_resume(cam);
+ break;
+ default:
+ retval = -EINVAL;
+ }
+
+ return retval;
+}
+
+/******************************************************************************
+ *
+ * ioctl_g_jpegcomp
+ *
+ * V4L2 get the JPEG compression parameters
+ *
+ *****************************************************************************/
+
+static int ioctl_g_jpegcomp(void *arg,struct camera_data *cam)
+{
+ struct v4l2_jpegcompression *parms = arg;
+
+ 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 ioctl_s_jpegcomp(void *arg,struct camera_data *cam)
+{
+ struct v4l2_jpegcompression *parms = arg;
+
+ 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 ioctl_reqbufs(void *arg,struct camera_data *cam)
+{
+ struct v4l2_requestbuffers *req = arg;
+
+ 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 ioctl_querybuf(void *arg,struct camera_data *cam)
+{
+ struct v4l2_buffer *buf = arg;
+
+ 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;
+
+ 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 ioctl_qbuf(void *arg,struct camera_data *cam)
+{
+ struct v4l2_buffer *buf = arg;
+
+ 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 ioctl_dqbuf(void *arg,struct camera_data *cam, struct file *file)
+{
+ struct v4l2_buffer *buf = arg;
+ 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;
+ up(&cam->busy_lock);
+ wait_event_interruptible(cam->wq_stream,
+ !cam->present ||
+ (cb=cam->curbuff)->status == FRAME_READY);
+ down(&cam->busy_lock);
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+ if(!cam->present)
+ 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;
+ 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->input = 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;
+}
+
+/******************************************************************************
+ *
+ * cpia2_ioctl
+ *
+ *****************************************************************************/
+static int cpia2_do_ioctl(struct inode *inode, struct file *file,
+ unsigned int ioctl_nr, void *arg)
+{
+ struct video_device *dev = video_devdata(file);
+ struct camera_data *cam = video_get_drvdata(dev);
+ int retval = 0;
+
+ if (!cam)
+ return -ENOTTY;
+
+ /* make this _really_ smp-safe */
+ if (down_interruptible(&cam->busy_lock))
+ return -ERESTARTSYS;
+
+ if (!cam->present) {
+ up(&cam->busy_lock);
+ return -ENODEV;
+ }
+
+ /* Priority check */
+ switch (ioctl_nr) {
+ case VIDIOCSWIN:
+ case VIDIOCMCAPTURE:
+ case VIDIOC_S_FMT:
+ {
+ struct cpia2_fh *fh = file->private_data;
+ retval = v4l2_prio_check(&cam->prio, &fh->prio);
+ if(retval) {
+ up(&cam->busy_lock);
+ return retval;
+ }
+ break;
+ }
+ case VIDIOCGMBUF:
+ case VIDIOCSYNC:
+ {
+ struct cpia2_fh *fh = file->private_data;
+ if(fh->prio != V4L2_PRIORITY_RECORD) {
+ up(&cam->busy_lock);
+ return -EBUSY;
+ }
+ break;
+ }
+ default:
+ break;
+ }
+
+ switch (ioctl_nr) {
+ case VIDIOCGCAP: /* query capabilites */
+ retval = ioctl_cap_query(arg, cam);
+ break;
+
+ case VIDIOCGCHAN: /* get video source - we are a camera, nothing else */
+ retval = ioctl_get_channel(arg);
+ break;
+ case VIDIOCSCHAN: /* set video source - we are a camera, nothing else */
+ retval = ioctl_set_channel(arg);
+ break;
+ case VIDIOCGPICT: /* image properties */
+ memcpy(arg, &cam->vp, sizeof(struct video_picture));
+ break;
+ case VIDIOCSPICT:
+ retval = ioctl_set_image_prop(arg, cam);
+ break;
+ case VIDIOCGWIN: /* get/set capture window */
+ memcpy(arg, &cam->vw, sizeof(struct video_window));
+ break;
+ case VIDIOCSWIN:
+ retval = ioctl_set_window_size(arg, cam, file->private_data);
+ break;
+ case VIDIOCGMBUF: /* mmap interface */
+ retval = ioctl_get_mbuf(arg, cam);
+ break;
+ case VIDIOCMCAPTURE:
+ retval = ioctl_mcapture(arg, cam, file->private_data);
+ break;
+ case VIDIOCSYNC:
+ retval = ioctl_sync(arg, cam);
+ break;
+ /* pointless to implement overlay with this camera */
+ case VIDIOCCAPTURE:
+ case VIDIOCGFBUF:
+ case VIDIOCSFBUF:
+ case VIDIOCKEY:
+ retval = -EINVAL;
+ break;
+
+ /* tuner interface - we have none */
+ case VIDIOCGTUNER:
+ case VIDIOCSTUNER:
+ case VIDIOCGFREQ:
+ case VIDIOCSFREQ:
+ retval = -EINVAL;
+ break;
+
+ /* audio interface - we have none */
+ case VIDIOCGAUDIO:
+ case VIDIOCSAUDIO:
+ retval = -EINVAL;
+ break;
+
+ /* CPIA2 extension to Video4Linux API */
+ case CPIA2_IOC_SET_GPIO:
+ retval = ioctl_set_gpio(arg, cam);
+ break;
+ case VIDIOC_QUERYCAP:
+ retval = ioctl_querycap(arg,cam);
+ break;
+
+ case VIDIOC_ENUMINPUT:
+ case VIDIOC_G_INPUT:
+ case VIDIOC_S_INPUT:
+ retval = ioctl_input(ioctl_nr, arg,cam);
+ break;
+
+ case VIDIOC_ENUM_FMT:
+ retval = ioctl_enum_fmt(arg,cam);
+ break;
+ case VIDIOC_TRY_FMT:
+ retval = ioctl_try_fmt(arg,cam);
+ break;
+ case VIDIOC_G_FMT:
+ retval = ioctl_get_fmt(arg,cam);
+ break;
+ case VIDIOC_S_FMT:
+ retval = ioctl_set_fmt(arg,cam,file->private_data);
+ break;
+
+ case VIDIOC_CROPCAP:
+ retval = ioctl_cropcap(arg,cam);
+ break;
+ case VIDIOC_G_CROP:
+ case VIDIOC_S_CROP:
+ // TODO: I think cropping can be implemented - SJB
+ retval = -EINVAL;
+ break;
+
+ case VIDIOC_QUERYCTRL:
+ retval = ioctl_queryctrl(arg,cam);
+ break;
+ case VIDIOC_QUERYMENU:
+ retval = ioctl_querymenu(arg,cam);
+ break;
+ case VIDIOC_G_CTRL:
+ retval = ioctl_g_ctrl(arg,cam);
+ break;
+ case VIDIOC_S_CTRL:
+ retval = ioctl_s_ctrl(arg,cam);
+ break;
+
+ case VIDIOC_G_JPEGCOMP:
+ retval = ioctl_g_jpegcomp(arg,cam);
+ break;
+ case VIDIOC_S_JPEGCOMP:
+ retval = ioctl_s_jpegcomp(arg,cam);
+ break;
+
+ case VIDIOC_G_PRIORITY:
+ {
+ struct cpia2_fh *fh = file->private_data;
+ *(enum v4l2_priority*)arg = fh->prio;
+ break;
+ }
+ case VIDIOC_S_PRIORITY:
+ {
+ struct cpia2_fh *fh = file->private_data;
+ enum v4l2_priority prio;
+ prio = *(enum v4l2_priority*)arg;
+ if(cam->streaming &&
+ prio != fh->prio &&
+ fh->prio == V4L2_PRIORITY_RECORD) {
+ /* Can't drop record priority while streaming */
+ retval = -EBUSY;
+ } else if(prio == V4L2_PRIORITY_RECORD &&
+ prio != fh->prio &&
+ v4l2_prio_max(&cam->prio) == V4L2_PRIORITY_RECORD) {
+ /* Only one program can record at a time */
+ retval = -EBUSY;
+ } else {
+ retval = v4l2_prio_change(&cam->prio, &fh->prio, prio);
+ }
+ break;
+ }
+
+ case VIDIOC_REQBUFS:
+ retval = ioctl_reqbufs(arg,cam);
+ break;
+ case VIDIOC_QUERYBUF:
+ retval = ioctl_querybuf(arg,cam);
+ break;
+ case VIDIOC_QBUF:
+ retval = ioctl_qbuf(arg,cam);
+ break;
+ case VIDIOC_DQBUF:
+ retval = ioctl_dqbuf(arg,cam,file);
+ break;
+ case VIDIOC_STREAMON:
+ {
+ int type;
+ DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming);
+ type = *(int*)arg;
+ if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ retval = -EINVAL;
+
+ if(!cam->streaming) {
+ retval = cpia2_usb_stream_start(cam,
+ cam->params.camera_state.stream_mode);
+ } else {
+ retval = -EINVAL;
+ }
+
+ break;
+ }
+ case VIDIOC_STREAMOFF:
+ {
+ int type;
+ DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming);
+ type = *(int*)arg;
+ if(!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ retval = -EINVAL;
+
+ if(cam->streaming) {
+ retval = cpia2_usb_stream_stop(cam);
+ } else {
+ retval = -EINVAL;
+ }
+
+ break;
+ }
+
+ case VIDIOC_ENUMOUTPUT:
+ case VIDIOC_G_OUTPUT:
+ case VIDIOC_S_OUTPUT:
+ case VIDIOC_G_MODULATOR:
+ case VIDIOC_S_MODULATOR:
+
+ case VIDIOC_ENUMAUDIO:
+ case VIDIOC_G_AUDIO:
+ case VIDIOC_S_AUDIO:
+
+ case VIDIOC_ENUMAUDOUT:
+ case VIDIOC_G_AUDOUT:
+ case VIDIOC_S_AUDOUT:
+
+ case VIDIOC_ENUMSTD:
+ case VIDIOC_QUERYSTD:
+ case VIDIOC_G_STD:
+ case VIDIOC_S_STD:
+
+ case VIDIOC_G_TUNER:
+ case VIDIOC_S_TUNER:
+ case VIDIOC_G_FREQUENCY:
+ case VIDIOC_S_FREQUENCY:
+
+ case VIDIOC_OVERLAY:
+ case VIDIOC_G_FBUF:
+ case VIDIOC_S_FBUF:
+
+ case VIDIOC_G_PARM:
+ case VIDIOC_S_PARM:
+ retval = -EINVAL;
+ break;
+ default:
+ retval = -ENOIOCTLCMD;
+ break;
+ }
+
+ up(&cam->busy_lock);
+ return retval;
+}
+
+static int cpia2_ioctl(struct inode *inode, struct file *file,
+ unsigned int ioctl_nr, unsigned long iarg)
+{
+ return video_usercopy(inode, file, ioctl_nr, iarg, cpia2_do_ioctl);
+}
+
+/******************************************************************************
+ *
+ * cpia2_mmap
+ *
+ *****************************************************************************/
+static int cpia2_mmap(struct file *file, struct vm_area_struct *area)
+{
+ int retval;
+ struct video_device *dev = video_devdata(file);
+ struct camera_data *cam = video_get_drvdata(dev);
+
+ /* Priority check */
+ struct cpia2_fh *fh = file->private_data;
+ if(fh->prio != V4L2_PRIORITY_RECORD) {
+ return -EBUSY;
+ }
+
+ retval = cpia2_remap_buffer(cam, area);
+
+ if(!retval)
+ fh->mmapped = 1;
+ return retval;
+}
+
+/******************************************************************************
+ *
+ * reset_camera_struct_v4l
+ *
+ * Sets all values to the defaults
+ *****************************************************************************/
+static void reset_camera_struct_v4l(struct camera_data *cam)
+{
+ /***
+ * Fill in the v4l structures. video_cap is filled in inside the VIDIOCCAP
+ * Ioctl. Here, just do the window and picture stucts.
+ ***/
+ cam->vp.palette = (u16) VIDEO_PALETTE_RGB24; /* Is this right? */
+ cam->vp.brightness = (u16) cam->params.color_params.brightness * 256;
+ cam->vp.colour = (u16) cam->params.color_params.saturation * 256;
+ cam->vp.contrast = (u16) cam->params.color_params.contrast * 256;
+
+ cam->vw.x = 0;
+ cam->vw.y = 0;
+ cam->vw.width = cam->params.roi.width;
+ cam->vw.height = cam->params.roi.height;
+ cam->vw.flags = 0;
+ cam->vw.clipcount = 0;
+
+ cam->frame_size = buffer_size;
+ cam->num_frames = num_buffers;
+
+ /* FlickerModes */
+ cam->params.flicker_control.flicker_mode_req = flicker_mode;
+ cam->params.flicker_control.mains_frequency = flicker_freq;
+
+ /* streamMode */
+ cam->params.camera_state.stream_mode = alternate;
+
+ cam->pixelformat = V4L2_PIX_FMT_JPEG;
+ v4l2_prio_init(&cam->prio);
+ return;
+}
+
+/***
+ * The v4l video device structure initialized for this device
+ ***/
+static struct file_operations fops_template = {
+ .owner= THIS_MODULE,
+ .open= cpia2_open,
+ .release= cpia2_close,
+ .read= cpia2_v4l_read,
+ .poll= cpia2_v4l_poll,
+ .ioctl= cpia2_ioctl,
+ .llseek= no_llseek,
+ .mmap= cpia2_mmap,
+};
+
+static struct video_device cpia2_template = {
+ /* I could not find any place for the old .initialize initializer?? */
+ .owner= THIS_MODULE,
+ .name= "CPiA2 Camera",
+ .type= VID_TYPE_CAPTURE,
+ .type2 = V4L2_CAP_VIDEO_CAPTURE |
+ V4L2_CAP_STREAMING,
+ .hardware= VID_HARDWARE_CPIA2,
+ .minor= -1,
+ .fops= &fops_template,
+ .release= video_device_release,
+};
+
+/******************************************************************************
+ *
+ * cpia2_register_camera
+ *
+ *****************************************************************************/
+int cpia2_register_camera(struct camera_data *cam)
+{
+ cam->vdev = video_device_alloc();
+ if(!cam->vdev)
+ return -ENOMEM;
+
+ memcpy(cam->vdev, &cpia2_template, sizeof(cpia2_template));
+ video_set_drvdata(cam->vdev, cam);
+
+ reset_camera_struct_v4l(cam);
+
+ /* register v4l device */
+ if (video_register_device
+ (cam->vdev, VFL_TYPE_GRABBER, video_nr) == -1) {
+ ERR("video_register_device failed\n");
+ video_device_release(cam->vdev);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * cpia2_unregister_camera
+ *
+ *****************************************************************************/
+void cpia2_unregister_camera(struct camera_data *cam)
+{
+ if (!cam->open_count) {
+ video_unregister_device(cam->vdev);
+ } else {
+ LOG("/dev/video%d removed while open, "
+ "deferring video_unregister_device\n",
+ cam->vdev->minor);
+ }
+}
+
+/******************************************************************************
+ *
+ * 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 != NEVER_FLICKER && flicker_mode != ANTI_FLICKER_ON) {
+ flicker_mode = NEVER_FLICKER;
+ LOG("Flicker mode specified is invalid, using %d\n",
+ flicker_mode);
+ }
+
+ if (flicker_freq != FLICKER_50 && flicker_freq != FLICKER_60) {
+ flicker_freq = FLICKER_60;
+ LOG("Flicker mode specified is invalid, using %d\n",
+ flicker_freq);
+ }
+
+ if(video_nr < -1 || video_nr > 64) {
+ video_nr = -1;
+ LOG("invalid video_nr specified, must be -1 to 64\n");
+ }
+
+ DBG("Using %d buffers, each %d bytes, alternate=%d\n",
+ num_buffers, buffer_size, alternate);
+}
+
+/************ Module Stuff ***************/
+
+
+/******************************************************************************
+ *
+ * cpia2_init/module_init
+ *
+ *****************************************************************************/
+int __init cpia2_init(void)
+{
+ LOG("%s v%d.%d.%d\n",
+ ABOUT, CPIA2_MAJ_VER, CPIA2_MIN_VER, CPIA2_PATCH_VER);
+ check_parameters();
+ cpia2_usb_init();
+ return 0;
+}
+
+
+/******************************************************************************
+ *
+ * cpia2_exit/module_exit
+ *
+ *****************************************************************************/
+void __exit cpia2_exit(void)
+{
+ cpia2_usb_cleanup();
+ schedule_timeout(2 * HZ);
+}
+
+
+int __init cpia2_setup(char *str)
+{
+ while(str) {
+ if(!strncmp(str, "buffer_size:", 12)) {
+ buffer_size = simple_strtoul(str + 13, &str, 10);
+ } else if(!strncmp(str, "num_buffers:", 12)) {
+ num_buffers = simple_strtoul(str + 13, &str, 10);
+ } else if(!strncmp(str, "alternate:", 10)) {
+ alternate = simple_strtoul(str + 11, &str, 10);
+ } else if(!strncmp(str, "video_nr:", 9)) {
+ video_nr = simple_strtoul(str + 10, &str, 10);
+ } else if(!strncmp(str, "flicker_freq:",13)) {
+ flicker_freq = simple_strtoul(str + 14, &str, 10);
+ } else if(!strncmp(str, "flicker_mode:",13)) {
+ flicker_mode = simple_strtoul(str + 14, &str, 10);
+ } else {
+ ++str;
+ }
+ }
+ return 1;
+}
+
+__setup("cpia2=", cpia2_setup);
+
+module_init(cpia2_init);
+module_exit(cpia2_exit);
+