1 /* 2 * cx18 ioctl control functions 3 * 4 * Derived from ivtv-controls.c 5 * 6 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 21 * 02111-1307 USA 22 */ 23 #include <linux/kernel.h> 24 #include <linux/slab.h> 25 26 #include "cx18-driver.h" 27 #include "cx18-cards.h" 28 #include "cx18-ioctl.h" 29 #include "cx18-audio.h" 30 #include "cx18-mailbox.h" 31 #include "cx18-controls.h" 32 33 static int cx18_s_stream_vbi_fmt(struct cx2341x_handler *cxhdl, u32 fmt) 34 { 35 struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl); 36 int type = cxhdl->stream_type->val; 37 38 if (atomic_read(&cx->ana_capturing) > 0) 39 return -EBUSY; 40 41 if (fmt != V4L2_MPEG_STREAM_VBI_FMT_IVTV || 42 !(type == V4L2_MPEG_STREAM_TYPE_MPEG2_PS || 43 type == V4L2_MPEG_STREAM_TYPE_MPEG2_DVD || 44 type == V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD)) { 45 /* Only IVTV fmt VBI insertion & only MPEG-2 PS type streams */ 46 cx->vbi.insert_mpeg = V4L2_MPEG_STREAM_VBI_FMT_NONE; 47 CX18_DEBUG_INFO("disabled insertion of sliced VBI data into " 48 "the MPEG stream\n"); 49 return 0; 50 } 51 52 /* Allocate sliced VBI buffers if needed. */ 53 if (cx->vbi.sliced_mpeg_data[0] == NULL) { 54 int i; 55 56 for (i = 0; i < CX18_VBI_FRAMES; i++) { 57 cx->vbi.sliced_mpeg_data[i] = 58 kmalloc(CX18_SLICED_MPEG_DATA_BUFSZ, GFP_KERNEL); 59 if (cx->vbi.sliced_mpeg_data[i] == NULL) { 60 while (--i >= 0) { 61 kfree(cx->vbi.sliced_mpeg_data[i]); 62 cx->vbi.sliced_mpeg_data[i] = NULL; 63 } 64 cx->vbi.insert_mpeg = 65 V4L2_MPEG_STREAM_VBI_FMT_NONE; 66 CX18_WARN("Unable to allocate buffers for " 67 "sliced VBI data insertion\n"); 68 return -ENOMEM; 69 } 70 } 71 } 72 73 cx->vbi.insert_mpeg = fmt; 74 CX18_DEBUG_INFO("enabled insertion of sliced VBI data into the MPEG PS," 75 "when sliced VBI is enabled\n"); 76 77 /* 78 * If our current settings have no lines set for capture, store a valid, 79 * default set of service lines to capture, in our current settings. 80 */ 81 if (cx18_get_service_set(cx->vbi.sliced_in) == 0) { 82 if (cx->is_60hz) 83 cx->vbi.sliced_in->service_set = 84 V4L2_SLICED_CAPTION_525; 85 else 86 cx->vbi.sliced_in->service_set = V4L2_SLICED_WSS_625; 87 cx18_expand_service_set(cx->vbi.sliced_in, cx->is_50hz); 88 } 89 return 0; 90 } 91 92 static int cx18_s_video_encoding(struct cx2341x_handler *cxhdl, u32 val) 93 { 94 struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl); 95 int is_mpeg1 = val == V4L2_MPEG_VIDEO_ENCODING_MPEG_1; 96 struct v4l2_subdev_format format = { 97 .which = V4L2_SUBDEV_FORMAT_ACTIVE, 98 }; 99 struct v4l2_mbus_framefmt *fmt = &format.format; 100 101 /* fix videodecoder resolution */ 102 fmt->width = cxhdl->width / (is_mpeg1 ? 2 : 1); 103 fmt->height = cxhdl->height; 104 fmt->code = MEDIA_BUS_FMT_FIXED; 105 v4l2_subdev_call(cx->sd_av, pad, set_fmt, NULL, &format); 106 return 0; 107 } 108 109 static int cx18_s_audio_sampling_freq(struct cx2341x_handler *cxhdl, u32 idx) 110 { 111 static const u32 freqs[3] = { 44100, 48000, 32000 }; 112 struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl); 113 114 /* The audio clock of the digitizer must match the codec sample 115 rate otherwise you get some very strange effects. */ 116 if (idx < ARRAY_SIZE(freqs)) 117 cx18_call_all(cx, audio, s_clock_freq, freqs[idx]); 118 return 0; 119 } 120 121 static int cx18_s_audio_mode(struct cx2341x_handler *cxhdl, u32 val) 122 { 123 struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl); 124 125 cx->dualwatch_stereo_mode = val; 126 return 0; 127 } 128 129 const struct cx2341x_handler_ops cx18_cxhdl_ops = { 130 .s_audio_mode = cx18_s_audio_mode, 131 .s_audio_sampling_freq = cx18_s_audio_sampling_freq, 132 .s_video_encoding = cx18_s_video_encoding, 133 .s_stream_vbi_fmt = cx18_s_stream_vbi_fmt, 134 }; 135