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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 | /* 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" #include "em28xx-v4l.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 int vbi_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt, unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[]) { struct em28xx *dev = vb2_get_drv_priv(vq); unsigned long size; if (fmt) size = fmt->fmt.pix.sizeimage; else size = dev->vbi_width * dev->vbi_height * 2; if (0 == *nbuffers) *nbuffers = 32; if (*nbuffers < 2) *nbuffers = 2; if (*nbuffers > 32) *nbuffers = 32; *nplanes = 1; sizes[0] = size; return 0; } static int vbi_buffer_prepare(struct vb2_buffer *vb) { struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue); struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); unsigned long size; size = dev->vbi_width * dev->vbi_height * 2; if (vb2_plane_size(vb, 0) < size) { printk(KERN_INFO "%s data will not fit into plane (%lu < %lu)\n", __func__, vb2_plane_size(vb, 0), size); return -EINVAL; } vb2_set_plane_payload(&buf->vb, 0, size); return 0; } static void vbi_buffer_queue(struct vb2_buffer *vb) { struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue); struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb); struct em28xx_dmaqueue *vbiq = &dev->vbiq; unsigned long flags = 0; buf->mem = vb2_plane_vaddr(vb, 0); buf->length = vb2_plane_size(vb, 0); spin_lock_irqsave(&dev->slock, flags); list_add_tail(&buf->list, &vbiq->active); spin_unlock_irqrestore(&dev->slock, flags); } struct vb2_ops em28xx_vbi_qops = { .queue_setup = vbi_queue_setup, .buf_prepare = vbi_buffer_prepare, .buf_queue = vbi_buffer_queue, .start_streaming = em28xx_start_analog_streaming, .stop_streaming = em28xx_stop_vbi_streaming, .wait_prepare = vb2_ops_wait_prepare, .wait_finish = vb2_ops_wait_finish, }; |