662 lines
16 KiB
C
662 lines
16 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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cx231xx_vbi.c - driver for Conexant Cx23100/101/102 USB video capture devices
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Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
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Based on cx88 driver
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*/
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#include "cx231xx.h"
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/bitmap.h>
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#include <linux/i2c.h>
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#include <linux/mm.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-ioctl.h>
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#include <media/drv-intf/msp3400.h>
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#include <media/tuner.h>
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#include "cx231xx-vbi.h"
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static inline void print_err_status(struct cx231xx *dev, int packet, int status)
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{
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char *errmsg = "Unknown";
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switch (status) {
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case -ENOENT:
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errmsg = "unlinked synchronously";
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break;
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case -ECONNRESET:
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errmsg = "unlinked asynchronously";
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break;
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case -ENOSR:
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errmsg = "Buffer error (overrun)";
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break;
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case -EPIPE:
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errmsg = "Stalled (device not responding)";
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break;
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case -EOVERFLOW:
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errmsg = "Babble (bad cable?)";
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break;
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case -EPROTO:
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errmsg = "Bit-stuff error (bad cable?)";
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break;
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case -EILSEQ:
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errmsg = "CRC/Timeout (could be anything)";
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break;
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case -ETIME:
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errmsg = "Device does not respond";
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break;
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}
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if (packet < 0) {
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dev_err(dev->dev,
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"URB status %d [%s].\n", status, errmsg);
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} else {
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dev_err(dev->dev,
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"URB packet %d, status %d [%s].\n",
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packet, status, errmsg);
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}
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}
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/*
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* Controls the isoc copy of each urb packet
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*/
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static inline int cx231xx_isoc_vbi_copy(struct cx231xx *dev, struct urb *urb)
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{
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struct cx231xx_dmaqueue *dma_q = urb->context;
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int rc = 1;
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unsigned char *p_buffer;
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u32 bytes_parsed = 0, buffer_size = 0;
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u8 sav_eav = 0;
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if (!dev)
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return 0;
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if (dev->state & DEV_DISCONNECTED)
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return 0;
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if (urb->status < 0) {
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print_err_status(dev, -1, urb->status);
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if (urb->status == -ENOENT)
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return 0;
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}
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/* get buffer pointer and length */
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p_buffer = urb->transfer_buffer;
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buffer_size = urb->actual_length;
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if (buffer_size > 0) {
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bytes_parsed = 0;
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if (dma_q->is_partial_line) {
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/* Handle the case where we were working on a partial
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line */
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sav_eav = dma_q->last_sav;
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} else {
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/* Check for a SAV/EAV overlapping the
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buffer boundary */
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sav_eav = cx231xx_find_boundary_SAV_EAV(p_buffer,
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dma_q->partial_buf,
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&bytes_parsed);
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}
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sav_eav &= 0xF0;
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/* Get the first line if we have some portion of an SAV/EAV from
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the last buffer or a partial line */
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if (sav_eav) {
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bytes_parsed += cx231xx_get_vbi_line(dev, dma_q,
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sav_eav, /* SAV/EAV */
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p_buffer + bytes_parsed, /* p_buffer */
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buffer_size - bytes_parsed); /* buffer size */
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}
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/* Now parse data that is completely in this buffer */
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dma_q->is_partial_line = 0;
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while (bytes_parsed < buffer_size) {
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u32 bytes_used = 0;
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sav_eav = cx231xx_find_next_SAV_EAV(
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p_buffer + bytes_parsed, /* p_buffer */
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buffer_size - bytes_parsed, /* buffer size */
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&bytes_used); /* bytes used to get SAV/EAV */
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bytes_parsed += bytes_used;
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sav_eav &= 0xF0;
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if (sav_eav && (bytes_parsed < buffer_size)) {
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bytes_parsed += cx231xx_get_vbi_line(dev,
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dma_q, sav_eav, /* SAV/EAV */
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p_buffer+bytes_parsed, /* p_buffer */
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buffer_size-bytes_parsed);/*buf size*/
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}
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}
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/* Save the last four bytes of the buffer so we can
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check the buffer boundary condition next time */
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memcpy(dma_q->partial_buf, p_buffer + buffer_size - 4, 4);
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bytes_parsed = 0;
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}
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return rc;
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}
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/* ------------------------------------------------------------------
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Vbi buf operations
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------------------------------------------------------------------*/
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static int vbi_queue_setup(struct vb2_queue *vq,
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unsigned int *nbuffers, unsigned int *nplanes,
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unsigned int sizes[], struct device *alloc_devs[])
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{
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struct cx231xx *dev = vb2_get_drv_priv(vq);
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u32 height = 0;
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height = ((dev->norm & V4L2_STD_625_50) ?
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PAL_VBI_LINES : NTSC_VBI_LINES);
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*nplanes = 1;
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sizes[0] = (dev->width * height * 2 * 2);
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return 0;
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}
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/* This is called *without* dev->slock held; please keep it that way */
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static int vbi_buf_prepare(struct vb2_buffer *vb)
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{
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struct cx231xx *dev = vb2_get_drv_priv(vb->vb2_queue);
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u32 height = 0;
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u32 size;
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height = ((dev->norm & V4L2_STD_625_50) ?
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PAL_VBI_LINES : NTSC_VBI_LINES);
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size = ((dev->width << 1) * height * 2);
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if (vb2_plane_size(vb, 0) < size)
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return -EINVAL;
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vb2_set_plane_payload(vb, 0, size);
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return 0;
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}
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static void vbi_buf_queue(struct vb2_buffer *vb)
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{
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struct cx231xx *dev = vb2_get_drv_priv(vb->vb2_queue);
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struct cx231xx_buffer *buf =
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container_of(vb, struct cx231xx_buffer, vb.vb2_buf);
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struct cx231xx_dmaqueue *vidq = &dev->vbi_mode.vidq;
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unsigned long flags;
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spin_lock_irqsave(&dev->vbi_mode.slock, flags);
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list_add_tail(&buf->list, &vidq->active);
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spin_unlock_irqrestore(&dev->vbi_mode.slock, flags);
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}
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static void return_all_buffers(struct cx231xx *dev,
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enum vb2_buffer_state state)
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{
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struct cx231xx_dmaqueue *vidq = &dev->vbi_mode.vidq;
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struct cx231xx_buffer *buf, *node;
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unsigned long flags;
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spin_lock_irqsave(&dev->vbi_mode.slock, flags);
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dev->vbi_mode.bulk_ctl.buf = NULL;
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list_for_each_entry_safe(buf, node, &vidq->active, list) {
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list_del(&buf->list);
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vb2_buffer_done(&buf->vb.vb2_buf, state);
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}
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spin_unlock_irqrestore(&dev->vbi_mode.slock, flags);
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}
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static int vbi_start_streaming(struct vb2_queue *vq, unsigned int count)
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{
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struct cx231xx *dev = vb2_get_drv_priv(vq);
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struct cx231xx_dmaqueue *vidq = &dev->vbi_mode.vidq;
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int ret;
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vidq->sequence = 0;
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ret = cx231xx_init_vbi_isoc(dev, CX231XX_NUM_VBI_PACKETS,
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CX231XX_NUM_VBI_BUFS,
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dev->vbi_mode.alt_max_pkt_size[0],
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cx231xx_isoc_vbi_copy);
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if (ret)
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return_all_buffers(dev, VB2_BUF_STATE_QUEUED);
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return ret;
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}
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static void vbi_stop_streaming(struct vb2_queue *vq)
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{
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struct cx231xx *dev = vb2_get_drv_priv(vq);
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return_all_buffers(dev, VB2_BUF_STATE_ERROR);
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}
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struct vb2_ops cx231xx_vbi_qops = {
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.queue_setup = vbi_queue_setup,
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.buf_prepare = vbi_buf_prepare,
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.buf_queue = vbi_buf_queue,
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.start_streaming = vbi_start_streaming,
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.stop_streaming = vbi_stop_streaming,
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.wait_prepare = vb2_ops_wait_prepare,
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.wait_finish = vb2_ops_wait_finish,
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};
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/* ------------------------------------------------------------------
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URB control
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------------------------------------------------------------------*/
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/*
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* IRQ callback, called by URB callback
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*/
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static void cx231xx_irq_vbi_callback(struct urb *urb)
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{
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struct cx231xx_dmaqueue *dma_q = urb->context;
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struct cx231xx_video_mode *vmode =
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container_of(dma_q, struct cx231xx_video_mode, vidq);
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struct cx231xx *dev = container_of(vmode, struct cx231xx, vbi_mode);
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unsigned long flags;
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switch (urb->status) {
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case 0: /* success */
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case -ETIMEDOUT: /* NAK */
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break;
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case -ECONNRESET: /* kill */
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case -ENOENT:
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case -ESHUTDOWN:
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return;
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default: /* error */
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dev_err(dev->dev,
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"urb completion error %d.\n", urb->status);
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break;
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}
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/* Copy data from URB */
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spin_lock_irqsave(&dev->vbi_mode.slock, flags);
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dev->vbi_mode.bulk_ctl.bulk_copy(dev, urb);
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spin_unlock_irqrestore(&dev->vbi_mode.slock, flags);
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/* Reset status */
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urb->status = 0;
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urb->status = usb_submit_urb(urb, GFP_ATOMIC);
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if (urb->status) {
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dev_err(dev->dev, "urb resubmit failed (error=%i)\n",
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urb->status);
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}
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}
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/*
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* Stop and Deallocate URBs
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*/
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void cx231xx_uninit_vbi_isoc(struct cx231xx *dev)
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{
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struct urb *urb;
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int i;
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dev_dbg(dev->dev, "called cx231xx_uninit_vbi_isoc\n");
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dev->vbi_mode.bulk_ctl.nfields = -1;
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for (i = 0; i < dev->vbi_mode.bulk_ctl.num_bufs; i++) {
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urb = dev->vbi_mode.bulk_ctl.urb[i];
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if (urb) {
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if (!irqs_disabled())
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usb_kill_urb(urb);
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else
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usb_unlink_urb(urb);
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if (dev->vbi_mode.bulk_ctl.transfer_buffer[i]) {
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kfree(dev->vbi_mode.bulk_ctl.
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transfer_buffer[i]);
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dev->vbi_mode.bulk_ctl.transfer_buffer[i] =
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NULL;
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}
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usb_free_urb(urb);
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dev->vbi_mode.bulk_ctl.urb[i] = NULL;
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}
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dev->vbi_mode.bulk_ctl.transfer_buffer[i] = NULL;
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}
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kfree(dev->vbi_mode.bulk_ctl.urb);
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kfree(dev->vbi_mode.bulk_ctl.transfer_buffer);
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dev->vbi_mode.bulk_ctl.urb = NULL;
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dev->vbi_mode.bulk_ctl.transfer_buffer = NULL;
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dev->vbi_mode.bulk_ctl.num_bufs = 0;
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cx231xx_capture_start(dev, 0, Vbi);
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}
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EXPORT_SYMBOL_GPL(cx231xx_uninit_vbi_isoc);
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/*
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* Allocate URBs and start IRQ
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*/
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int cx231xx_init_vbi_isoc(struct cx231xx *dev, int max_packets,
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int num_bufs, int max_pkt_size,
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int (*bulk_copy) (struct cx231xx *dev,
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struct urb *urb))
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{
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struct cx231xx_dmaqueue *dma_q = &dev->vbi_mode.vidq;
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int i;
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int sb_size, pipe;
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struct urb *urb;
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int rc;
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dev_dbg(dev->dev, "called cx231xx_vbi_isoc\n");
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/* De-allocates all pending stuff */
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cx231xx_uninit_vbi_isoc(dev);
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/* clear if any halt */
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usb_clear_halt(dev->udev,
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usb_rcvbulkpipe(dev->udev,
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dev->vbi_mode.end_point_addr));
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dev->vbi_mode.bulk_ctl.bulk_copy = bulk_copy;
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dev->vbi_mode.bulk_ctl.num_bufs = num_bufs;
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dma_q->pos = 0;
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dma_q->is_partial_line = 0;
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dma_q->last_sav = 0;
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dma_q->current_field = -1;
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|
|
dma_q->bytes_left_in_line = dev->width << 1;
|
||
|
|
dma_q->lines_per_field = ((dev->norm & V4L2_STD_625_50) ?
|
||
|
|
PAL_VBI_LINES : NTSC_VBI_LINES);
|
||
|
|
dma_q->lines_completed = 0;
|
||
|
|
for (i = 0; i < 8; i++)
|
||
|
|
dma_q->partial_buf[i] = 0;
|
||
|
|
|
||
|
|
dev->vbi_mode.bulk_ctl.urb = kcalloc(num_bufs, sizeof(void *),
|
||
|
|
GFP_KERNEL);
|
||
|
|
if (!dev->vbi_mode.bulk_ctl.urb) {
|
||
|
|
dev_err(dev->dev,
|
||
|
|
"cannot alloc memory for usb buffers\n");
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
dev->vbi_mode.bulk_ctl.transfer_buffer =
|
||
|
|
kcalloc(num_bufs, sizeof(void *), GFP_KERNEL);
|
||
|
|
if (!dev->vbi_mode.bulk_ctl.transfer_buffer) {
|
||
|
|
dev_err(dev->dev,
|
||
|
|
"cannot allocate memory for usbtransfer\n");
|
||
|
|
kfree(dev->vbi_mode.bulk_ctl.urb);
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
dev->vbi_mode.bulk_ctl.max_pkt_size = max_pkt_size;
|
||
|
|
dev->vbi_mode.bulk_ctl.buf = NULL;
|
||
|
|
|
||
|
|
sb_size = max_packets * dev->vbi_mode.bulk_ctl.max_pkt_size;
|
||
|
|
|
||
|
|
/* allocate urbs and transfer buffers */
|
||
|
|
for (i = 0; i < dev->vbi_mode.bulk_ctl.num_bufs; i++) {
|
||
|
|
|
||
|
|
urb = usb_alloc_urb(0, GFP_KERNEL);
|
||
|
|
if (!urb) {
|
||
|
|
cx231xx_uninit_vbi_isoc(dev);
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
dev->vbi_mode.bulk_ctl.urb[i] = urb;
|
||
|
|
urb->transfer_flags = 0;
|
||
|
|
|
||
|
|
dev->vbi_mode.bulk_ctl.transfer_buffer[i] =
|
||
|
|
kzalloc(sb_size, GFP_KERNEL);
|
||
|
|
if (!dev->vbi_mode.bulk_ctl.transfer_buffer[i]) {
|
||
|
|
dev_err(dev->dev,
|
||
|
|
"unable to allocate %i bytes for transfer buffer %i\n",
|
||
|
|
sb_size, i);
|
||
|
|
cx231xx_uninit_vbi_isoc(dev);
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
pipe = usb_rcvbulkpipe(dev->udev, dev->vbi_mode.end_point_addr);
|
||
|
|
usb_fill_bulk_urb(urb, dev->udev, pipe,
|
||
|
|
dev->vbi_mode.bulk_ctl.transfer_buffer[i],
|
||
|
|
sb_size, cx231xx_irq_vbi_callback, dma_q);
|
||
|
|
}
|
||
|
|
|
||
|
|
init_waitqueue_head(&dma_q->wq);
|
||
|
|
|
||
|
|
/* submit urbs and enables IRQ */
|
||
|
|
for (i = 0; i < dev->vbi_mode.bulk_ctl.num_bufs; i++) {
|
||
|
|
rc = usb_submit_urb(dev->vbi_mode.bulk_ctl.urb[i], GFP_ATOMIC);
|
||
|
|
if (rc) {
|
||
|
|
dev_err(dev->dev,
|
||
|
|
"submit of urb %i failed (error=%i)\n", i, rc);
|
||
|
|
cx231xx_uninit_vbi_isoc(dev);
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
cx231xx_capture_start(dev, 1, Vbi);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(cx231xx_init_vbi_isoc);
|
||
|
|
|
||
|
|
u32 cx231xx_get_vbi_line(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,
|
||
|
|
u8 sav_eav, u8 *p_buffer, u32 buffer_size)
|
||
|
|
{
|
||
|
|
u32 bytes_copied = 0;
|
||
|
|
int current_field = -1;
|
||
|
|
|
||
|
|
switch (sav_eav) {
|
||
|
|
|
||
|
|
case SAV_VBI_FIELD1:
|
||
|
|
current_field = 1;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case SAV_VBI_FIELD2:
|
||
|
|
current_field = 2;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (current_field < 0)
|
||
|
|
return bytes_copied;
|
||
|
|
|
||
|
|
dma_q->last_sav = sav_eav;
|
||
|
|
|
||
|
|
bytes_copied =
|
||
|
|
cx231xx_copy_vbi_line(dev, dma_q, p_buffer, buffer_size,
|
||
|
|
current_field);
|
||
|
|
|
||
|
|
return bytes_copied;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Announces that a buffer were filled and request the next
|
||
|
|
*/
|
||
|
|
static inline void vbi_buffer_filled(struct cx231xx *dev,
|
||
|
|
struct cx231xx_dmaqueue *dma_q,
|
||
|
|
struct cx231xx_buffer *buf)
|
||
|
|
{
|
||
|
|
/* Advice that buffer was filled */
|
||
|
|
/* dev_dbg(dev->dev, "[%p/%d] wakeup\n", buf, buf->vb.index); */
|
||
|
|
|
||
|
|
buf->vb.sequence = dma_q->sequence++;
|
||
|
|
buf->vb.vb2_buf.timestamp = ktime_get_ns();
|
||
|
|
|
||
|
|
dev->vbi_mode.bulk_ctl.buf = NULL;
|
||
|
|
|
||
|
|
list_del(&buf->list);
|
||
|
|
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
|
||
|
|
}
|
||
|
|
|
||
|
|
u32 cx231xx_copy_vbi_line(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,
|
||
|
|
u8 *p_line, u32 length, int field_number)
|
||
|
|
{
|
||
|
|
u32 bytes_to_copy;
|
||
|
|
struct cx231xx_buffer *buf;
|
||
|
|
u32 _line_size = dev->width * 2;
|
||
|
|
|
||
|
|
if (dma_q->current_field == -1) {
|
||
|
|
/* Just starting up */
|
||
|
|
cx231xx_reset_vbi_buffer(dev, dma_q);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (dma_q->current_field != field_number)
|
||
|
|
dma_q->lines_completed = 0;
|
||
|
|
|
||
|
|
/* get the buffer pointer */
|
||
|
|
buf = dev->vbi_mode.bulk_ctl.buf;
|
||
|
|
|
||
|
|
/* Remember the field number for next time */
|
||
|
|
dma_q->current_field = field_number;
|
||
|
|
|
||
|
|
bytes_to_copy = dma_q->bytes_left_in_line;
|
||
|
|
if (bytes_to_copy > length)
|
||
|
|
bytes_to_copy = length;
|
||
|
|
|
||
|
|
if (dma_q->lines_completed >= dma_q->lines_per_field) {
|
||
|
|
dma_q->bytes_left_in_line -= bytes_to_copy;
|
||
|
|
dma_q->is_partial_line =
|
||
|
|
(dma_q->bytes_left_in_line == 0) ? 0 : 1;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
dma_q->is_partial_line = 1;
|
||
|
|
|
||
|
|
/* If we don't have a buffer, just return the number of bytes we would
|
||
|
|
have copied if we had a buffer. */
|
||
|
|
if (!buf) {
|
||
|
|
dma_q->bytes_left_in_line -= bytes_to_copy;
|
||
|
|
dma_q->is_partial_line =
|
||
|
|
(dma_q->bytes_left_in_line == 0) ? 0 : 1;
|
||
|
|
return bytes_to_copy;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* copy the data to video buffer */
|
||
|
|
cx231xx_do_vbi_copy(dev, dma_q, p_line, bytes_to_copy);
|
||
|
|
|
||
|
|
dma_q->pos += bytes_to_copy;
|
||
|
|
dma_q->bytes_left_in_line -= bytes_to_copy;
|
||
|
|
|
||
|
|
if (dma_q->bytes_left_in_line == 0) {
|
||
|
|
|
||
|
|
dma_q->bytes_left_in_line = _line_size;
|
||
|
|
dma_q->lines_completed++;
|
||
|
|
dma_q->is_partial_line = 0;
|
||
|
|
|
||
|
|
if (cx231xx_is_vbi_buffer_done(dev, dma_q) && buf) {
|
||
|
|
|
||
|
|
vbi_buffer_filled(dev, dma_q, buf);
|
||
|
|
|
||
|
|
dma_q->pos = 0;
|
||
|
|
dma_q->lines_completed = 0;
|
||
|
|
cx231xx_reset_vbi_buffer(dev, dma_q);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return bytes_to_copy;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* generic routine to get the next available buffer
|
||
|
|
*/
|
||
|
|
static inline void get_next_vbi_buf(struct cx231xx_dmaqueue *dma_q,
|
||
|
|
struct cx231xx_buffer **buf)
|
||
|
|
{
|
||
|
|
struct cx231xx_video_mode *vmode =
|
||
|
|
container_of(dma_q, struct cx231xx_video_mode, vidq);
|
||
|
|
struct cx231xx *dev = container_of(vmode, struct cx231xx, vbi_mode);
|
||
|
|
char *outp;
|
||
|
|
|
||
|
|
if (list_empty(&dma_q->active)) {
|
||
|
|
dev_err(dev->dev, "No active queue to serve\n");
|
||
|
|
dev->vbi_mode.bulk_ctl.buf = NULL;
|
||
|
|
*buf = NULL;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Get the next buffer */
|
||
|
|
*buf = list_entry(dma_q->active.next, struct cx231xx_buffer, list);
|
||
|
|
|
||
|
|
/* Cleans up buffer - Useful for testing for frame/URB loss */
|
||
|
|
outp = vb2_plane_vaddr(&(*buf)->vb.vb2_buf, 0);
|
||
|
|
memset(outp, 0, vb2_plane_size(&(*buf)->vb.vb2_buf, 0));
|
||
|
|
|
||
|
|
dev->vbi_mode.bulk_ctl.buf = *buf;
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
void cx231xx_reset_vbi_buffer(struct cx231xx *dev,
|
||
|
|
struct cx231xx_dmaqueue *dma_q)
|
||
|
|
{
|
||
|
|
struct cx231xx_buffer *buf;
|
||
|
|
|
||
|
|
buf = dev->vbi_mode.bulk_ctl.buf;
|
||
|
|
|
||
|
|
if (buf == NULL) {
|
||
|
|
/* first try to get the buffer */
|
||
|
|
get_next_vbi_buf(dma_q, &buf);
|
||
|
|
|
||
|
|
dma_q->pos = 0;
|
||
|
|
dma_q->current_field = -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
dma_q->bytes_left_in_line = dev->width << 1;
|
||
|
|
dma_q->lines_completed = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int cx231xx_do_vbi_copy(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,
|
||
|
|
u8 *p_buffer, u32 bytes_to_copy)
|
||
|
|
{
|
||
|
|
u8 *p_out_buffer = NULL;
|
||
|
|
u32 current_line_bytes_copied = 0;
|
||
|
|
struct cx231xx_buffer *buf;
|
||
|
|
u32 _line_size = dev->width << 1;
|
||
|
|
void *startwrite;
|
||
|
|
int offset, lencopy;
|
||
|
|
|
||
|
|
buf = dev->vbi_mode.bulk_ctl.buf;
|
||
|
|
|
||
|
|
if (buf == NULL)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
p_out_buffer = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
|
||
|
|
|
||
|
|
if (dma_q->bytes_left_in_line != _line_size) {
|
||
|
|
current_line_bytes_copied =
|
||
|
|
_line_size - dma_q->bytes_left_in_line;
|
||
|
|
}
|
||
|
|
|
||
|
|
offset = (dma_q->lines_completed * _line_size) +
|
||
|
|
current_line_bytes_copied;
|
||
|
|
|
||
|
|
if (dma_q->current_field == 2) {
|
||
|
|
/* Populate the second half of the frame */
|
||
|
|
offset += (dev->width * 2 * dma_q->lines_per_field);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* prepare destination address */
|
||
|
|
startwrite = p_out_buffer + offset;
|
||
|
|
|
||
|
|
lencopy = dma_q->bytes_left_in_line > bytes_to_copy ?
|
||
|
|
bytes_to_copy : dma_q->bytes_left_in_line;
|
||
|
|
|
||
|
|
memcpy(startwrite, p_buffer, lencopy);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
u8 cx231xx_is_vbi_buffer_done(struct cx231xx *dev,
|
||
|
|
struct cx231xx_dmaqueue *dma_q)
|
||
|
|
{
|
||
|
|
u32 height = 0;
|
||
|
|
|
||
|
|
height = ((dev->norm & V4L2_STD_625_50) ?
|
||
|
|
PAL_VBI_LINES : NTSC_VBI_LINES);
|
||
|
|
if (dma_q->lines_completed == height && dma_q->current_field == 2)
|
||
|
|
return 1;
|
||
|
|
else
|
||
|
|
return 0;
|
||
|
|
}
|