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1227 lines
32 KiB
1227 lines
32 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/**************************************************************************** |
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* |
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* Filename: cpia2_v4l.c |
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* |
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* Copyright 2001, STMicrolectronics, Inc. |
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* Contact: [email protected] |
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* Copyright 2001,2005, Scott J. Bertin <[email protected]> |
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* |
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* Description: |
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* This is a USB driver for CPia2 based video cameras. |
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* The infrastructure of this driver is based on the cpia usb driver by |
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* Jochen Scharrlach and Johannes Erdfeldt. |
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* |
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* Stripped of 2.4 stuff ready for main kernel submit by |
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* Alan Cox <[email protected]> |
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****************************************************************************/ |
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|
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#define CPIA_VERSION "3.0.1" |
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|
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#include <linux/module.h> |
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#include <linux/time.h> |
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#include <linux/sched.h> |
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#include <linux/slab.h> |
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#include <linux/init.h> |
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#include <linux/videodev2.h> |
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#include <linux/stringify.h> |
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#include <media/v4l2-ioctl.h> |
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#include <media/v4l2-event.h> |
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#include "cpia2.h" |
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|
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static int video_nr = -1; |
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module_param(video_nr, int, 0); |
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MODULE_PARM_DESC(video_nr, "video device to register (0=/dev/video0, etc)"); |
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static int buffer_size = 68 * 1024; |
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module_param(buffer_size, int, 0); |
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MODULE_PARM_DESC(buffer_size, "Size for each frame buffer in bytes (default 68k)"); |
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|
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static int num_buffers = 3; |
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module_param(num_buffers, int, 0); |
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MODULE_PARM_DESC(num_buffers, "Number of frame buffers (1-" |
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__stringify(VIDEO_MAX_FRAME) ", default 3)"); |
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|
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static int alternate = DEFAULT_ALT; |
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module_param(alternate, int, 0); |
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MODULE_PARM_DESC(alternate, "USB Alternate (" __stringify(USBIF_ISO_1) "-" |
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__stringify(USBIF_ISO_6) ", default " |
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__stringify(DEFAULT_ALT) ")"); |
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|
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static int flicker_mode; |
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module_param(flicker_mode, int, 0); |
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MODULE_PARM_DESC(flicker_mode, "Flicker frequency (0 (disabled), " __stringify(50) " or " |
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__stringify(60) ", default 0)"); |
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MODULE_AUTHOR("Steve Miller (STMicroelectronics) <[email protected]>"); |
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MODULE_DESCRIPTION("V4L-driver for STMicroelectronics CPiA2 based cameras"); |
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MODULE_LICENSE("GPL"); |
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MODULE_VERSION(CPIA_VERSION); |
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|
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#define ABOUT "V4L-Driver for Vision CPiA2 based cameras" |
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#define CPIA2_CID_USB_ALT (V4L2_CID_USER_BASE | 0xf000) |
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|
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/****************************************************************************** |
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* |
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* cpia2_open |
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* |
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*****************************************************************************/ |
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static int cpia2_open(struct file *file) |
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{ |
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struct camera_data *cam = video_drvdata(file); |
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int retval; |
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|
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if (mutex_lock_interruptible(&cam->v4l2_lock)) |
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return -ERESTARTSYS; |
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retval = v4l2_fh_open(file); |
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if (retval) |
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goto open_unlock; |
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|
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if (v4l2_fh_is_singular_file(file)) { |
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if (cpia2_allocate_buffers(cam)) { |
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v4l2_fh_release(file); |
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retval = -ENOMEM; |
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goto open_unlock; |
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} |
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|
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/* reset the camera */ |
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if (cpia2_reset_camera(cam) < 0) { |
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v4l2_fh_release(file); |
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retval = -EIO; |
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goto open_unlock; |
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} |
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|
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cam->APP_len = 0; |
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cam->COM_len = 0; |
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} |
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cpia2_dbg_dump_registers(cam); |
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open_unlock: |
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mutex_unlock(&cam->v4l2_lock); |
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return retval; |
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} |
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/****************************************************************************** |
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* |
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* cpia2_close |
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* |
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*****************************************************************************/ |
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static int cpia2_close(struct file *file) |
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{ |
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struct video_device *dev = video_devdata(file); |
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struct camera_data *cam = video_get_drvdata(dev); |
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mutex_lock(&cam->v4l2_lock); |
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if (video_is_registered(&cam->vdev) && v4l2_fh_is_singular_file(file)) { |
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cpia2_usb_stream_stop(cam); |
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|
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/* save camera state for later open */ |
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cpia2_save_camera_state(cam); |
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cpia2_set_low_power(cam); |
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cpia2_free_buffers(cam); |
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} |
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if (cam->stream_fh == file->private_data) { |
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cam->stream_fh = NULL; |
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cam->mmapped = 0; |
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} |
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mutex_unlock(&cam->v4l2_lock); |
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return v4l2_fh_release(file); |
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} |
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|
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/****************************************************************************** |
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* |
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* cpia2_v4l_read |
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* |
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*****************************************************************************/ |
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static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count, |
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loff_t *off) |
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{ |
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struct camera_data *cam = video_drvdata(file); |
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int noblock = file->f_flags&O_NONBLOCK; |
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ssize_t ret; |
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if(!cam) |
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return -EINVAL; |
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|
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if (mutex_lock_interruptible(&cam->v4l2_lock)) |
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return -ERESTARTSYS; |
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ret = cpia2_read(cam, buf, count, noblock); |
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mutex_unlock(&cam->v4l2_lock); |
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return ret; |
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} |
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/****************************************************************************** |
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* |
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* cpia2_v4l_poll |
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* |
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*****************************************************************************/ |
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static __poll_t cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait) |
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{ |
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struct camera_data *cam = video_drvdata(filp); |
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__poll_t res; |
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mutex_lock(&cam->v4l2_lock); |
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res = cpia2_poll(cam, filp, wait); |
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mutex_unlock(&cam->v4l2_lock); |
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return res; |
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} |
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static int sync(struct camera_data *cam, int frame_nr) |
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{ |
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struct framebuf *frame = &cam->buffers[frame_nr]; |
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while (1) { |
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if (frame->status == FRAME_READY) |
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return 0; |
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if (!cam->streaming) { |
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frame->status = FRAME_READY; |
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frame->length = 0; |
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return 0; |
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} |
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mutex_unlock(&cam->v4l2_lock); |
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wait_event_interruptible(cam->wq_stream, |
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!cam->streaming || |
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frame->status == FRAME_READY); |
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mutex_lock(&cam->v4l2_lock); |
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if (signal_pending(current)) |
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return -ERESTARTSYS; |
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if (!video_is_registered(&cam->vdev)) |
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return -ENOTTY; |
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} |
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} |
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/****************************************************************************** |
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* |
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* ioctl_querycap |
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* |
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* V4L2 device capabilities |
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* |
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*****************************************************************************/ |
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static int cpia2_querycap(struct file *file, void *fh, struct v4l2_capability *vc) |
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{ |
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struct camera_data *cam = video_drvdata(file); |
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strscpy(vc->driver, "cpia2", sizeof(vc->driver)); |
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if (cam->params.pnp_id.product == 0x151) |
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strscpy(vc->card, "QX5 Microscope", sizeof(vc->card)); |
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else |
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strscpy(vc->card, "CPiA2 Camera", sizeof(vc->card)); |
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switch (cam->params.pnp_id.device_type) { |
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case DEVICE_STV_672: |
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strcat(vc->card, " (672/"); |
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break; |
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case DEVICE_STV_676: |
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strcat(vc->card, " (676/"); |
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break; |
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default: |
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strcat(vc->card, " (XXX/"); |
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break; |
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} |
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switch (cam->params.version.sensor_flags) { |
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case CPIA2_VP_SENSOR_FLAGS_404: |
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strcat(vc->card, "404)"); |
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break; |
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case CPIA2_VP_SENSOR_FLAGS_407: |
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strcat(vc->card, "407)"); |
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break; |
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case CPIA2_VP_SENSOR_FLAGS_409: |
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strcat(vc->card, "409)"); |
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break; |
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case CPIA2_VP_SENSOR_FLAGS_410: |
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strcat(vc->card, "410)"); |
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break; |
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case CPIA2_VP_SENSOR_FLAGS_500: |
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strcat(vc->card, "500)"); |
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break; |
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default: |
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strcat(vc->card, "XXX)"); |
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break; |
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} |
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if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0) |
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memset(vc->bus_info,0, sizeof(vc->bus_info)); |
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return 0; |
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} |
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/****************************************************************************** |
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* |
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* ioctl_input |
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* |
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* V4L2 input get/set/enumerate |
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* |
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*****************************************************************************/ |
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static int cpia2_enum_input(struct file *file, void *fh, struct v4l2_input *i) |
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{ |
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if (i->index) |
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return -EINVAL; |
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strscpy(i->name, "Camera", sizeof(i->name)); |
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i->type = V4L2_INPUT_TYPE_CAMERA; |
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return 0; |
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} |
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static int cpia2_g_input(struct file *file, void *fh, unsigned int *i) |
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{ |
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*i = 0; |
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return 0; |
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} |
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static int cpia2_s_input(struct file *file, void *fh, unsigned int i) |
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{ |
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return i ? -EINVAL : 0; |
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} |
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/****************************************************************************** |
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* |
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* ioctl_enum_fmt |
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* |
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* V4L2 format enumerate |
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* |
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*****************************************************************************/ |
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static int cpia2_enum_fmt_vid_cap(struct file *file, void *fh, |
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struct v4l2_fmtdesc *f) |
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{ |
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if (f->index > 1) |
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return -EINVAL; |
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if (f->index == 0) |
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f->pixelformat = V4L2_PIX_FMT_MJPEG; |
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else |
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f->pixelformat = V4L2_PIX_FMT_JPEG; |
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return 0; |
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} |
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/****************************************************************************** |
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* |
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* ioctl_try_fmt |
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* |
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* V4L2 format try |
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* |
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*****************************************************************************/ |
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static int cpia2_try_fmt_vid_cap(struct file *file, void *fh, |
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struct v4l2_format *f) |
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{ |
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struct camera_data *cam = video_drvdata(file); |
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if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG && |
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f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG) |
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return -EINVAL; |
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f->fmt.pix.field = V4L2_FIELD_NONE; |
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f->fmt.pix.bytesperline = 0; |
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f->fmt.pix.sizeimage = cam->frame_size; |
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f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG; |
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switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) { |
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case VIDEOSIZE_VGA: |
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f->fmt.pix.width = 640; |
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f->fmt.pix.height = 480; |
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break; |
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case VIDEOSIZE_CIF: |
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f->fmt.pix.width = 352; |
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f->fmt.pix.height = 288; |
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break; |
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case VIDEOSIZE_QVGA: |
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f->fmt.pix.width = 320; |
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f->fmt.pix.height = 240; |
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break; |
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case VIDEOSIZE_288_216: |
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f->fmt.pix.width = 288; |
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f->fmt.pix.height = 216; |
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break; |
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case VIDEOSIZE_256_192: |
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f->fmt.pix.width = 256; |
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f->fmt.pix.height = 192; |
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break; |
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case VIDEOSIZE_224_168: |
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f->fmt.pix.width = 224; |
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f->fmt.pix.height = 168; |
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break; |
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case VIDEOSIZE_192_144: |
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f->fmt.pix.width = 192; |
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f->fmt.pix.height = 144; |
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break; |
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case VIDEOSIZE_QCIF: |
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default: |
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f->fmt.pix.width = 176; |
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f->fmt.pix.height = 144; |
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break; |
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} |
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return 0; |
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} |
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/****************************************************************************** |
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* |
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* ioctl_set_fmt |
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* |
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* V4L2 format set |
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* |
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*****************************************************************************/ |
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static int cpia2_s_fmt_vid_cap(struct file *file, void *_fh, |
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struct v4l2_format *f) |
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{ |
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struct camera_data *cam = video_drvdata(file); |
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int err, frame; |
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err = cpia2_try_fmt_vid_cap(file, _fh, f); |
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if(err != 0) |
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return err; |
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cam->pixelformat = f->fmt.pix.pixelformat; |
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|
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/* NOTE: This should be set to 1 for MJPEG, but some apps don't handle |
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* the missing Huffman table properly. */ |
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cam->params.compression.inhibit_htables = 0; |
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/*f->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG;*/ |
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|
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/* we set the video window to something smaller or equal to what |
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* is requested by the user??? |
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*/ |
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DBG("Requested width = %d, height = %d\n", |
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f->fmt.pix.width, f->fmt.pix.height); |
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if (f->fmt.pix.width != cam->width || |
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f->fmt.pix.height != cam->height) { |
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cam->width = f->fmt.pix.width; |
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cam->height = f->fmt.pix.height; |
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cam->params.roi.width = f->fmt.pix.width; |
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cam->params.roi.height = f->fmt.pix.height; |
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cpia2_set_format(cam); |
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} |
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for (frame = 0; frame < cam->num_frames; ++frame) { |
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if (cam->buffers[frame].status == FRAME_READING) |
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if ((err = sync(cam, frame)) < 0) |
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return err; |
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cam->buffers[frame].status = FRAME_EMPTY; |
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} |
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return 0; |
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} |
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|
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/****************************************************************************** |
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* |
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* ioctl_get_fmt |
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* |
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* V4L2 format get |
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* |
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*****************************************************************************/ |
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static int cpia2_g_fmt_vid_cap(struct file *file, void *fh, |
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struct v4l2_format *f) |
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{ |
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struct camera_data *cam = video_drvdata(file); |
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f->fmt.pix.width = cam->width; |
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f->fmt.pix.height = cam->height; |
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f->fmt.pix.pixelformat = cam->pixelformat; |
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f->fmt.pix.field = V4L2_FIELD_NONE; |
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f->fmt.pix.bytesperline = 0; |
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f->fmt.pix.sizeimage = cam->frame_size; |
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f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG; |
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return 0; |
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} |
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/****************************************************************************** |
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* |
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* ioctl_cropcap |
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* |
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* V4L2 query cropping capabilities |
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* NOTE: cropping is currently disabled |
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* |
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*****************************************************************************/ |
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|
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static int cpia2_g_selection(struct file *file, void *fh, |
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struct v4l2_selection *s) |
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{ |
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struct camera_data *cam = video_drvdata(file); |
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|
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if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
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return -EINVAL; |
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|
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switch (s->target) { |
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case V4L2_SEL_TGT_CROP_BOUNDS: |
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case V4L2_SEL_TGT_CROP_DEFAULT: |
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s->r.left = 0; |
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s->r.top = 0; |
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s->r.width = cam->width; |
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s->r.height = cam->height; |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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|
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struct framerate_info { |
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int value; |
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struct v4l2_fract period; |
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}; |
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|
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static const struct framerate_info framerate_controls[] = { |
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{ CPIA2_VP_FRAMERATE_6_25, { 4, 25 } }, |
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{ CPIA2_VP_FRAMERATE_7_5, { 2, 15 } }, |
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{ CPIA2_VP_FRAMERATE_12_5, { 2, 25 } }, |
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{ CPIA2_VP_FRAMERATE_15, { 1, 15 } }, |
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{ CPIA2_VP_FRAMERATE_25, { 1, 25 } }, |
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{ CPIA2_VP_FRAMERATE_30, { 1, 30 } }, |
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}; |
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|
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static int cpia2_g_parm(struct file *file, void *fh, struct v4l2_streamparm *p) |
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{ |
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struct camera_data *cam = video_drvdata(file); |
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struct v4l2_captureparm *cap = &p->parm.capture; |
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int i; |
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|
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if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
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return -EINVAL; |
|
|
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cap->capability = V4L2_CAP_TIMEPERFRAME; |
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cap->readbuffers = cam->num_frames; |
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for (i = 0; i < ARRAY_SIZE(framerate_controls); i++) |
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if (cam->params.vp_params.frame_rate == framerate_controls[i].value) { |
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cap->timeperframe = framerate_controls[i].period; |
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break; |
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} |
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return 0; |
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} |
|
|
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static int cpia2_s_parm(struct file *file, void *fh, struct v4l2_streamparm *p) |
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{ |
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struct camera_data *cam = video_drvdata(file); |
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struct v4l2_captureparm *cap = &p->parm.capture; |
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struct v4l2_fract tpf = cap->timeperframe; |
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int max = ARRAY_SIZE(framerate_controls) - 1; |
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int ret; |
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int i; |
|
|
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ret = cpia2_g_parm(file, fh, p); |
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if (ret || !tpf.denominator || !tpf.numerator) |
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return ret; |
|
|
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/* Maximum 15 fps for this model */ |
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if (cam->params.pnp_id.device_type == DEVICE_STV_672 && |
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cam->params.version.sensor_flags == CPIA2_VP_SENSOR_FLAGS_500) |
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max -= 2; |
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for (i = 0; i <= max; i++) { |
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struct v4l2_fract f1 = tpf; |
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struct v4l2_fract f2 = framerate_controls[i].period; |
|
|
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f1.numerator *= f2.denominator; |
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f2.numerator *= f1.denominator; |
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if (f1.numerator >= f2.numerator) |
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break; |
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} |
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if (i > max) |
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i = max; |
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cap->timeperframe = framerate_controls[i].period; |
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return cpia2_set_fps(cam, framerate_controls[i].value); |
|
} |
|
|
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static const struct { |
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u32 width; |
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u32 height; |
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} cpia2_framesizes[] = { |
|
{ 640, 480 }, |
|
{ 352, 288 }, |
|
{ 320, 240 }, |
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{ 288, 216 }, |
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{ 256, 192 }, |
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{ 224, 168 }, |
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{ 192, 144 }, |
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{ 176, 144 }, |
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}; |
|
|
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static int cpia2_enum_framesizes(struct file *file, void *fh, |
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struct v4l2_frmsizeenum *fsize) |
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{ |
|
|
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if (fsize->pixel_format != V4L2_PIX_FMT_MJPEG && |
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fsize->pixel_format != V4L2_PIX_FMT_JPEG) |
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return -EINVAL; |
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if (fsize->index >= ARRAY_SIZE(cpia2_framesizes)) |
|
return -EINVAL; |
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fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; |
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fsize->discrete.width = cpia2_framesizes[fsize->index].width; |
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fsize->discrete.height = cpia2_framesizes[fsize->index].height; |
|
|
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return 0; |
|
} |
|
|
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static int cpia2_enum_frameintervals(struct file *file, void *fh, |
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struct v4l2_frmivalenum *fival) |
|
{ |
|
struct camera_data *cam = video_drvdata(file); |
|
int max = ARRAY_SIZE(framerate_controls) - 1; |
|
int i; |
|
|
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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; |
|
v4l2_buffer_set_timestamp(buf, cam->buffers[buf->index].ts); |
|
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 */ |
|
if (cam->buffers[i].ts < cam->buffers[found].ts) |
|
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; |
|
v4l2_buffer_set_timestamp(buf, cam->buffers[buf->index].ts); |
|
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->request_fd = 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_g_selection = cpia2_g_selection, |
|
.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 const 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; |
|
cam->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | |
|
V4L2_CAP_STREAMING; |
|
|
|
reset_camera_struct_v4l(cam); |
|
|
|
/* register v4l device */ |
|
if (video_register_device(&cam->vdev, VFL_TYPE_VIDEO, 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(); |
|
return cpia2_usb_init(); |
|
} |
|
|
|
|
|
/****************************************************************************** |
|
* |
|
* 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);
|
|
|