mirror of
https://github.com/patjak/facetimehd.git
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bcwc_pci: add video 4 linux skeleton
This commit is contained in:
Sven Schnelle
2
Makefile
2
Makefile
@@ -1,4 +1,4 @@
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bcwc_pcie-objs := bcwc_ddr.o bcwc_hw.o bcwc_drv.o bcwc_ringbuf.o bcwc_isp.o
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bcwc_pcie-objs := bcwc_ddr.o bcwc_hw.o bcwc_drv.o bcwc_ringbuf.o bcwc_isp.o bcwc_v4l2.o
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obj-m := bcwc_pcie.o
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obj-m := bcwc_pcie.o
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KVERSION := $(shell uname -r)
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KVERSION := $(shell uname -r)
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@@ -30,6 +30,7 @@
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#include "bcwc_hw.h"
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#include "bcwc_hw.h"
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#include "bcwc_isp.h"
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#include "bcwc_isp.h"
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#include "bcwc_ringbuf.h"
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#include "bcwc_ringbuf.h"
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#include "bcwc_v4l2.h"
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static int bcwc_pci_reserve_mem(struct bcwc_private *dev_priv)
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static int bcwc_pci_reserve_mem(struct bcwc_private *dev_priv)
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{
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{
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425
bcwc_v4l2.c
Normal file
425
bcwc_v4l2.c
Normal file
@@ -0,0 +1,425 @@
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/*
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* Broadcom PCIe 1570 webcam driver
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*
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* Copyright (C) 2015 Sven Schnelle <svens@stackframe.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/spinlock.h>
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#include <linux/sched.h>
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#include <linux/wait.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-dev.h>
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#include <media/v4l2-ioctl.h>
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#include <media/videobuf-dma-sg.h>
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#include "bcwc_drv.h"
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#include "bcwc_hw.h"
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#include "bcwc_isp.h"
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#include "bcwc_ringbuf.h"
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#include "bcwc_buffer.h"
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static int bcwc_vb_buf_setup(struct videobuf_queue *q,
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unsigned int *count, unsigned int *size)
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{
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struct bcwc_private *priv = q->priv_data;
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pr_debug("%s: %d\n", __FUNCTION__, priv->user_format.sizeimage);
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*size = priv->user_format.sizeimage;
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if (*count == 0 || *count > 6)
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*count = 6;
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return 0;
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}
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static int bcwc_vb_buf_prepare(struct videobuf_queue *q,
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struct videobuf_buffer *vb, enum v4l2_field field)
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{
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struct bcwc_private *priv = q->priv_data;
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int ret;
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pr_debug("%s\n", __FUNCTION__);
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vb->size = priv->user_format.sizeimage;
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vb->width = priv->user_format.width;
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vb->height = priv->user_format.height;
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vb->field = field;
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if (vb->state == VIDEOBUF_NEEDS_INIT) {
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ret = videobuf_iolock(q, vb, NULL);
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if (ret)
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return ret;
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}
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vb->state = VIDEOBUF_PREPARED;
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return 0;
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}
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static void bcwc_vb_buf_queue(struct videobuf_queue *q,
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struct videobuf_buffer *vb)
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{
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struct bcwc_private *priv = q->priv_data;
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pr_debug("%s\n", __FUNCTION__);
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vb->state = VIDEOBUF_QUEUED;
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list_add_tail(&vb->queue, &priv->buffer_queue);
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}
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static void bcwc_vb_buf_release(struct videobuf_queue *q,
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struct videobuf_buffer *vb)
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{
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struct bcwc_private *priv = q->priv_data;
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pr_debug("%s\n", __FUNCTION__);
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videobuf_dma_unmap(&priv->pdev->dev, videobuf_to_dma(vb));
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videobuf_dma_free(videobuf_to_dma(vb));
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vb->state = VIDEOBUF_NEEDS_INIT;
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}
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static const struct videobuf_queue_ops bcwc_vb_ops = {
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.buf_setup = bcwc_vb_buf_setup,
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.buf_prepare = bcwc_vb_buf_prepare,
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.buf_queue = bcwc_vb_buf_queue,
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.buf_release = bcwc_vb_buf_release,
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};
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static int bcwc_v4l2_open(struct file *filp)
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{
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struct bcwc_private *priv = video_drvdata(filp);
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pr_info("%s: %p\n", __FUNCTION__, priv);
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mutex_lock(&priv->ioctl_lock);
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videobuf_queue_sg_init(&priv->vb_queue, &bcwc_vb_ops,
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&priv->pdev->dev, &priv->vb_queue_lock,
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V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE,
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sizeof(struct videobuf_buffer), priv, NULL);
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if (!priv->users++) {
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bcwc_isp_cmd_channel_start(priv);
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}
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mutex_unlock(&priv->ioctl_lock);
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return 0;
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}
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static int bcwc_v4l2_release(struct file *filp)
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{
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struct bcwc_private *priv = video_drvdata(filp);
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pr_info("%s\n", __FUNCTION__);
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mutex_lock(&priv->ioctl_lock);
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if (!--priv->users) {
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bcwc_isp_cmd_channel_stop(priv);
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}
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videobuf_stop(&priv->vb_queue);
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videobuf_mmap_free(&priv->vb_queue);
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mutex_unlock(&priv->ioctl_lock);
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return 0;
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}
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static ssize_t bcwc_v4l2_read(struct file *filp, char __user *buffer,
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size_t len, loff_t *pos)
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{
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struct bcwc_private *priv = video_drvdata(filp);
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pr_info("%s: buf %p, size %d, pos %p\n", __FUNCTION__, buffer, (int)len, pos);
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return videobuf_read_stream(&priv->vb_queue, buffer, len, pos, 0,
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filp->f_flags & O_NONBLOCK);
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}
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static unsigned int bcwc_v4l2_poll(struct file *filp, struct poll_table_struct *pt)
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{
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struct bcwc_private *priv = video_drvdata(filp);
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pr_debug("%s\n", __FUNCTION__);
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return videobuf_poll_stream(filp, &priv->vb_queue, pt);
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}
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static int bcwc_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
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{
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struct bcwc_private *priv = video_drvdata(filp);
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pr_debug("%s\n", __FUNCTION__);
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return videobuf_mmap_mapper(&priv->vb_queue, vma);
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}
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static struct v4l2_file_operations bcwc_vdev_fops = {
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.owner = THIS_MODULE,
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.open = bcwc_v4l2_open,
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.release = bcwc_v4l2_release,
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.read = bcwc_v4l2_read,
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.poll = bcwc_v4l2_poll,
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.mmap = bcwc_v4l2_mmap,
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.unlocked_ioctl = video_ioctl2
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};
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static int bcwc_v4l2_ioctl_enum_input(struct file *filp, void *priv,
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struct v4l2_input *input)
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{
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if (input->index != 0)
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return -EINVAL;
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input->type = V4L2_INPUT_TYPE_CAMERA;
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input->std = V4L2_STD_ALL;
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strcpy(input->name, "Apple Facetime");
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return 0;
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}
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static int bcwc_v4l2_ioctl_g_input(struct file *filp, void *priv, 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 bcwc_v4l2_ioctl_s_input(struct file *filp, void *priv, unsigned int i)
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{
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if (i != 0)
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return -EINVAL;
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return 0;
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}
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static int bcwc_v4l2_ioctl_s_std(struct file *filp, void *priv, v4l2_std_id std)
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{
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return 0;
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}
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static int bcwc_v4l2_ioctl_g_std(struct file *filp, void *priv, v4l2_std_id *std)
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{
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*std = V4L2_STD_NTSC_M;
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return 0;
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}
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static int bcwc_v4l2_ioctl_querycap(struct file *filp, void *priv,
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struct v4l2_capability *cap)
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{
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strcpy(cap->driver, "bcwc");
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strcpy(cap->card, "facetimehd");
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cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
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V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
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cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
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return 0;
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}
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static struct bcwc_format {
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__u8 *desc;
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__u32 pixelformat;
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int bpp; /* Bytes per pixel */
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u32 mbus_code;
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} bcwc_formats[] = {
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{
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.desc = "YUYV 4:2:2",
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.pixelformat = V4L2_PIX_FMT_YUYV,
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.mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
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.bpp = 2,
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},
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};
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#if 0
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static struct bcwc_format *bcwc_find_format(u32 pixelformat)
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{
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unsigned i;
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for (i = 0; i < ARRAY_SIZE(bcwc_formats); i++)
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if (bcwc_formats[i].pixelformat == pixelformat)
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return bcwc_formats + i;
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/* Not found? Then return the first format. */
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return bcwc_formats;
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}
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#endif
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static const struct v4l2_pix_format bcwc_def_pix_format = {
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.width = 1280,
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.height = 720,
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.pixelformat = V4L2_PIX_FMT_YUYV,
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.field = V4L2_FIELD_NONE,
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.bytesperline = 1280 * 2,
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.sizeimage = 1280 * 720 * 2,
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};
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static const u32 bcwc_def_mbus_code = MEDIA_BUS_FMT_YUYV8_2X8;
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static int bcwc_v4l2_ioctl_enum_fmt_vid_cap(struct file *filp, void *priv,
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struct v4l2_fmtdesc *fmt)
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{
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if (fmt->index >= ARRAY_SIZE(bcwc_formats))
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return -EINVAL;
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strlcpy(fmt->description, bcwc_formats[fmt->index].desc,
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sizeof(fmt->description));
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fmt->pixelformat = bcwc_formats[fmt->index].pixelformat;
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return 0;
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}
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static int bcwc_v4l2_ioctl_try_fmt_vid_cap(struct file *filp, void *_priv,
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struct v4l2_format *fmt)
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{
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struct bcwc_private *priv = video_drvdata(filp);
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pr_info("%s: %dx%d\n", __FUNCTION__, fmt->fmt.pix.width, fmt->fmt.pix.height);
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if (fmt->fmt.pix.height != 720 ||
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fmt->fmt.pix.width != 1280 ||
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fmt->fmt.pix.pixelformat != V4L2_PIX_FMT_YUYV)
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return -EINVAL;
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|
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priv->user_format.height = fmt->fmt.pix.height;
|
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priv->user_format.width = fmt->fmt.pix.width;
|
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priv->user_format.sizeimage = priv->user_format.height * priv->user_format.width * 2;
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return 0;
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|
}
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|
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static int bcwc_v4l2_ioctl_g_fmt_vid_cap(struct file *filp, void *priv,
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struct v4l2_format *fmt)
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{
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fmt->fmt.pix.height = 720;
|
||||||
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fmt->fmt.pix.width = 1280;
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fmt->fmt.pix.sizeimage = 1280 * 720;
|
||||||
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fmt->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
|
||||||
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return 0;
|
||||||
|
}
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||||||
|
|
||||||
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static int bcwc_v4l2_ioctl_s_fmt_vid_cap(struct file *filp, void *priv,
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struct v4l2_format *fmt)
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|
{
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||||||
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pr_info("%s: %dx%d\n", __FUNCTION__, fmt->fmt.pix.width, fmt->fmt.pix.height);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
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static int bcwc_v4l2_ioctl_reqbufs(struct file *filp, void *_priv,
|
||||||
|
struct v4l2_requestbuffers *rb)
|
||||||
|
{
|
||||||
|
struct bcwc_private *priv = video_drvdata(filp);
|
||||||
|
return videobuf_reqbufs(&priv->vb_queue, rb);
|
||||||
|
}
|
||||||
|
|
||||||
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static int bcwc_v4l2_ioctl_querybuf(struct file *filp, void *_priv,
|
||||||
|
struct v4l2_buffer *buf)
|
||||||
|
{
|
||||||
|
struct bcwc_private *priv = video_drvdata(filp);
|
||||||
|
return videobuf_querybuf(&priv->vb_queue, buf);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bcwc_v4l2_ioctl_qbuf(struct file *filp, void *_priv,
|
||||||
|
struct v4l2_buffer *buf)
|
||||||
|
{
|
||||||
|
struct bcwc_private *priv = video_drvdata(filp);
|
||||||
|
return videobuf_qbuf(&priv->vb_queue, buf);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bcwc_v4l2_ioctl_dqbuf(struct file *filp, void *_priv,
|
||||||
|
struct v4l2_buffer *buf)
|
||||||
|
{
|
||||||
|
struct bcwc_private *priv = video_drvdata(filp);
|
||||||
|
return videobuf_dqbuf(&priv->vb_queue, buf, filp->f_flags & O_NONBLOCK);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bcwc_v4l2_ioctl_streamon(struct file *filp, void *priv, enum v4l2_buf_type t)
|
||||||
|
{
|
||||||
|
pr_debug("%s\n", __FUNCTION__);
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bcwc_v4l2_ioctl_streamoff(struct file *filp, void *priv, enum v4l2_buf_type t)
|
||||||
|
{
|
||||||
|
pr_debug("%s\n", __FUNCTION__);
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bcwc_v4l2_ioctl_g_parm(struct file *filp, void *priv,
|
||||||
|
struct v4l2_streamparm *parm)
|
||||||
|
{
|
||||||
|
pr_debug("%s\n", __FUNCTION__);
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bcwc_v4l2_ioctl_s_parm(struct file *filp, void *priv,
|
||||||
|
struct v4l2_streamparm *parm)
|
||||||
|
{
|
||||||
|
pr_debug("%s\n", __FUNCTION__);
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bcwc_v4l2_ioctl_enum_framesizes(struct file *filp, void *priv,
|
||||||
|
struct v4l2_frmsizeenum *sizes)
|
||||||
|
{
|
||||||
|
pr_debug("%s\n", __FUNCTION__);
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int bcwc_v4l2_ioctl_enum_frameintervals(struct file *filp, void *priv,
|
||||||
|
struct v4l2_frmivalenum *interval)
|
||||||
|
{
|
||||||
|
pr_debug("%s\n", __FUNCTION__);
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct v4l2_ioctl_ops bcwc_ioctl_ops = {
|
||||||
|
.vidioc_enum_input = bcwc_v4l2_ioctl_enum_input,
|
||||||
|
.vidioc_g_input = bcwc_v4l2_ioctl_g_input,
|
||||||
|
.vidioc_s_input = bcwc_v4l2_ioctl_s_input,
|
||||||
|
.vidioc_s_std = bcwc_v4l2_ioctl_s_std,
|
||||||
|
.vidioc_g_std = bcwc_v4l2_ioctl_g_std,
|
||||||
|
.vidioc_enum_fmt_vid_cap = bcwc_v4l2_ioctl_enum_fmt_vid_cap,
|
||||||
|
.vidioc_try_fmt_vid_cap = bcwc_v4l2_ioctl_try_fmt_vid_cap,
|
||||||
|
|
||||||
|
.vidioc_g_fmt_vid_cap = bcwc_v4l2_ioctl_g_fmt_vid_cap,
|
||||||
|
.vidioc_s_fmt_vid_cap = bcwc_v4l2_ioctl_s_fmt_vid_cap,
|
||||||
|
.vidioc_querycap = bcwc_v4l2_ioctl_querycap,
|
||||||
|
.vidioc_reqbufs = bcwc_v4l2_ioctl_reqbufs,
|
||||||
|
|
||||||
|
.vidioc_querybuf = bcwc_v4l2_ioctl_querybuf,
|
||||||
|
.vidioc_qbuf = bcwc_v4l2_ioctl_qbuf,
|
||||||
|
.vidioc_dqbuf = bcwc_v4l2_ioctl_dqbuf,
|
||||||
|
|
||||||
|
.vidioc_streamon = bcwc_v4l2_ioctl_streamon,
|
||||||
|
.vidioc_streamoff = bcwc_v4l2_ioctl_streamoff,
|
||||||
|
.vidioc_g_parm = bcwc_v4l2_ioctl_g_parm,
|
||||||
|
.vidioc_s_parm = bcwc_v4l2_ioctl_s_parm,
|
||||||
|
.vidioc_enum_framesizes = bcwc_v4l2_ioctl_enum_framesizes,
|
||||||
|
.vidioc_enum_frameintervals = bcwc_v4l2_ioctl_enum_frameintervals,
|
||||||
|
};
|
||||||
|
|
||||||
|
int bcwc_v4l2_register(struct bcwc_private *dev_priv)
|
||||||
|
{
|
||||||
|
struct v4l2_device *v4l2_dev = &dev_priv->v4l2_dev;
|
||||||
|
struct video_device *vdev;
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
ret = v4l2_device_register(&dev_priv->pdev->dev, v4l2_dev);
|
||||||
|
if (ret) {
|
||||||
|
pr_err("v4l2_device_register: %d\n", ret);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
vdev = video_device_alloc();
|
||||||
|
if (!vdev) {
|
||||||
|
ret = -ENOMEM;
|
||||||
|
goto fail;
|
||||||
|
}
|
||||||
|
dev_priv->videodev = vdev;
|
||||||
|
|
||||||
|
vdev->v4l2_dev = v4l2_dev;
|
||||||
|
strcpy(vdev->name, "Apple Facetime HD"); // XXX: Length?
|
||||||
|
vdev->vfl_dir = VFL_DIR_RX;
|
||||||
|
vdev->fops = &bcwc_vdev_fops;
|
||||||
|
vdev->ioctl_ops = &bcwc_ioctl_ops;
|
||||||
|
vdev->release = video_device_release;
|
||||||
|
pr_info("%s: dev_priv %p\n", __FUNCTION__, dev_priv);
|
||||||
|
video_set_drvdata(vdev, dev_priv);
|
||||||
|
ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
|
||||||
|
if (ret) {
|
||||||
|
video_device_release(vdev);
|
||||||
|
goto fail;
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
fail:
|
||||||
|
v4l2_device_unregister(&dev_priv->v4l2_dev);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
void bcwc_v4l2_unregister(struct bcwc_private *dev_priv)
|
||||||
|
{
|
||||||
|
video_unregister_device(dev_priv->videodev);
|
||||||
|
v4l2_device_unregister(&dev_priv->v4l2_dev);
|
||||||
|
}
|
||||||
34
bcwc_v4l2.h
Normal file
34
bcwc_v4l2.h
Normal file
@@ -0,0 +1,34 @@
|
|||||||
|
/*
|
||||||
|
* Broadcom PCIe 1570 webcam driver
|
||||||
|
*
|
||||||
|
* Copyright (C) 2015 Sven Schnelle <svens@stackframe.org>
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or modify it
|
||||||
|
* under the terms of the GNU General Public License version 2 as published by
|
||||||
|
* the Free Software Foundation.
|
||||||
|
*
|
||||||
|
* 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.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef _BCWC_PCIE_H
|
||||||
|
#define _PCWC_PCIE_H
|
||||||
|
|
||||||
|
#include <linux/pci.h>
|
||||||
|
#include <linux/spinlock.h>
|
||||||
|
#include <linux/wait.h>
|
||||||
|
#include <linux/mutex.h>
|
||||||
|
#include <media/videobuf-dma-sg.h>
|
||||||
|
#include <media/v4l2-device.h>
|
||||||
|
|
||||||
|
struct bcwc_private;
|
||||||
|
extern int bcwc_v4l2_register(struct bcwc_private *dev_priv);
|
||||||
|
extern void bcwc_v4l2_unregister(struct bcwc_private *dev_priv);
|
||||||
|
|
||||||
|
#endif
|
||||||
Reference in New Issue
Block a user