drivers/media/usb/cx231xx/cx231xx-vbi.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3    cx231xx_vbi.h - driver for Conexant Cx23100/101/102 USB video capture devices
   4
   5    Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
   6                 Based on cx88 driver
   7
   8  */
   9
  10 #ifndef _CX231XX_VBI_H
  11 #define _CX231XX_VBI_H
  12
  13 extern struct vb2_ops cx231xx_vbi_qops;
  14
  15 #define   NTSC_VBI_START_LINE 10        /* line 10 - 21 */
  16 #define   NTSC_VBI_END_LINE   21
  17 #define   NTSC_VBI_LINES          (NTSC_VBI_END_LINE-NTSC_VBI_START_LINE+1)
  18
  19 #define   PAL_VBI_START_LINE  6
  20 #define   PAL_VBI_END_LINE    23
  21 #define   PAL_VBI_LINES       (PAL_VBI_END_LINE-PAL_VBI_START_LINE+1)
  22
  23 #define   VBI_STRIDE            1440
  24 #define   VBI_SAMPLES_PER_LINE  1440
  25
  26 #define   CX231XX_NUM_VBI_PACKETS       4
  27 #define   CX231XX_NUM_VBI_BUFS          5
  28
  29 /* stream functions */
  30 int cx231xx_init_vbi_isoc(struct cx231xx *dev, int max_packets,
  31                           int num_bufs, int max_pkt_size,
  32                           int (*bulk_copy) (struct cx231xx *dev,
  33                                             struct urb *urb));
  34
  35 void cx231xx_uninit_vbi_isoc(struct cx231xx *dev);
  36
  37 /* vbi data copy functions */
  38 u32 cx231xx_get_vbi_line(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,
  39                          u8 sav_eav, u8 *p_buffer, u32 buffer_size);
  40
  41 u32 cx231xx_copy_vbi_line(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,
  42                           u8 *p_line, u32 length, int field_number);
  43
  44 void cx231xx_reset_vbi_buffer(struct cx231xx *dev,
  45                               struct cx231xx_dmaqueue *dma_q);
  46
  47 int cx231xx_do_vbi_copy(struct cx231xx *dev, struct cx231xx_dmaqueue *dma_q,
  48                         u8 *p_buffer, u32 bytes_to_copy);
  49
  50 u8 cx231xx_is_vbi_buffer_done(struct cx231xx *dev,
  51                               struct cx231xx_dmaqueue *dma_q);
  52
  53 #endif