diff options
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-vbi.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-vbi.c | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/drivers/media/video/em28xx/em28xx-vbi.c b/drivers/media/video/em28xx/em28xx-vbi.c deleted file mode 100644 index 2b4c9cba2d67..000000000000 --- a/drivers/media/video/em28xx/em28xx-vbi.c +++ /dev/null @@ -1,145 +0,0 @@ -/* - em28xx-vbi.c - VBI driver for em28xx - - Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com> - - This work was sponsored by EyeMagnet Limited. - - 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., 51 Franklin Street, Fifth Floor, Boston, MA - 02110-1301, USA. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/hardirq.h> -#include <linux/init.h> - -#include "em28xx.h" - -static unsigned int vbibufs = 5; -module_param(vbibufs, int, 0644); -MODULE_PARM_DESC(vbibufs, "number of vbi buffers, range 2-32"); - -static unsigned int vbi_debug; -module_param(vbi_debug, int, 0644); -MODULE_PARM_DESC(vbi_debug, "enable debug messages [vbi]"); - -#define dprintk(level, fmt, arg...) if (vbi_debug >= level) \ - printk(KERN_DEBUG "%s: " fmt, dev->core->name , ## arg) - -/* ------------------------------------------------------------------ */ - -static void -free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf) -{ - struct em28xx_fh *fh = vq->priv_data; - struct em28xx *dev = fh->dev; - unsigned long flags = 0; - if (in_interrupt()) - BUG(); - - /* We used to wait for the buffer to finish here, but this didn't work - because, as we were keeping the state as VIDEOBUF_QUEUED, - videobuf_queue_cancel marked it as finished for us. - (Also, it could wedge forever if the hardware was misconfigured.) - - This should be safe; by the time we get here, the buffer isn't - queued anymore. If we ever start marking the buffers as - VIDEOBUF_ACTIVE, it won't be, though. - */ - spin_lock_irqsave(&dev->slock, flags); - if (dev->isoc_ctl.vbi_buf == buf) - dev->isoc_ctl.vbi_buf = NULL; - spin_unlock_irqrestore(&dev->slock, flags); - - videobuf_vmalloc_free(&buf->vb); - buf->vb.state = VIDEOBUF_NEEDS_INIT; -} - -static int -vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size) -{ - struct em28xx_fh *fh = q->priv_data; - struct em28xx *dev = fh->dev; - - *size = dev->vbi_width * dev->vbi_height * 2; - - if (0 == *count) - *count = vbibufs; - if (*count < 2) - *count = 2; - if (*count > 32) - *count = 32; - return 0; -} - -static int -vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb, - enum v4l2_field field) -{ - struct em28xx_fh *fh = q->priv_data; - struct em28xx *dev = fh->dev; - struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); - int rc = 0; - - buf->vb.size = dev->vbi_width * dev->vbi_height * 2; - - if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size) - return -EINVAL; - - buf->vb.width = dev->vbi_width; - buf->vb.height = dev->vbi_height; - buf->vb.field = field; - - if (VIDEOBUF_NEEDS_INIT == buf->vb.state) { - rc = videobuf_iolock(q, &buf->vb, NULL); - if (rc < 0) - goto fail; - } - - buf->vb.state = VIDEOBUF_PREPARED; - return 0; - -fail: - free_buffer(q, buf); - return rc; -} - -static void -vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) -{ - struct em28xx_buffer *buf = container_of(vb, - struct em28xx_buffer, - vb); - struct em28xx_fh *fh = vq->priv_data; - struct em28xx *dev = fh->dev; - struct em28xx_dmaqueue *vbiq = &dev->vbiq; - - buf->vb.state = VIDEOBUF_QUEUED; - list_add_tail(&buf->vb.queue, &vbiq->active); -} - -static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb) -{ - struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); - free_buffer(q, buf); -} - -struct videobuf_queue_ops em28xx_vbi_qops = { - .buf_setup = vbi_setup, - .buf_prepare = vbi_prepare, - .buf_queue = vbi_queue, - .buf_release = vbi_release, -}; |