/* init/start/stop/exit stream functions Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com> Copyright (C) 2004 Chris Kennedy <c@groovy.org> Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl>
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* License: GPL * Author: Kevin Thayer <nufan_wfk at yahoo dot com> * * This file will hold API related functions, both internal (firmware api) * and external (v4l2, etc) * * ----- * MPG600/MPG160 support by T.Adachi <tadachi@tadachi-net.com> * and Takeru KOMORIYA<komoriya@paken.org> * * AVerMedia M179 GPIO info by Chris Pinkham <cpinkham@bc2va.org> * using information provided by Jiun-Kuei Jung @ AVerMedia.
*/
#define IVTV_V4L2_DEC_MPG_OFFSET 16 /* offset from 0 to register decoder mpg v4l2 minors on */ #define IVTV_V4L2_ENC_PCM_OFFSET 24 /* offset from 0 to register pcm v4l2 minors on */ #define IVTV_V4L2_ENC_YUV_OFFSET 32 /* offset from 0 to register yuv v4l2 minors on */ #define IVTV_V4L2_DEC_YUV_OFFSET 48 /* offset from 0 to register decoder yuv v4l2 minors on */ #define IVTV_V4L2_DEC_VBI_OFFSET 8 /* offset from 0 to register decoder vbi input v4l2 minors on */ #define IVTV_V4L2_DEC_VOUT_OFFSET 16 /* offset from 0 to register vbi output v4l2 minors on */
staticint ivtv_prep_dev(struct ivtv *itv, int type)
{ struct ivtv_stream *s = &itv->streams[type]; int num_offset = ivtv_stream_info[type].num_offset; int num = itv->instance + ivtv_first_minor + num_offset;
/* These four fields are always initialized. If vdev.v4l2_dev == NULL, then this stream is not in use. In that case no other fields but these
four can be used. */
s->vdev.v4l2_dev = NULL;
s->itv = itv;
s->type = type;
s->name = ivtv_stream_info[type].name;
/* Check whether the radio is supported */ if (type == IVTV_ENC_STREAM_TYPE_RAD && !(itv->v4l2_cap & V4L2_CAP_RADIO)) return 0; if (type >= IVTV_DEC_STREAM_TYPE_MPG && !(itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT)) return 0;
/* User explicitly selected 0 buffers for these streams, so don't
create them. */ if (ivtv_stream_info[type].dma != DMA_NONE &&
itv->options.kilobytes[type] == 0) {
IVTV_INFO("Disabled %s device\n", ivtv_stream_info[type].name); return 0;
}
/* Initialize v4l2 variables and prepare v4l2 devices */ int ivtv_streams_setup(struct ivtv *itv)
{ int type;
/* Setup V4L2 Devices */ for (type = 0; type < IVTV_MAX_STREAMS; type++) { /* Prepare device */ if (ivtv_prep_dev(itv, type)) break;
if (itv->streams[type].vdev.v4l2_dev == NULL) continue;
/* Allocate Stream */ if (ivtv_stream_alloc(&itv->streams[type])) break;
} if (type == IVTV_MAX_STREAMS) return 0;
/* One or more streams could not be initialized. Clean 'em all up. */
ivtv_streams_cleanup(itv); return -ENOMEM;
}
staticint ivtv_reg_dev(struct ivtv *itv, int type)
{ struct ivtv_stream *s = &itv->streams[type]; int vfl_type = ivtv_stream_info[type].vfl_type; constchar *name; int num;
if (s->vdev.v4l2_dev == NULL) return 0;
num = s->vdev.num; /* card number + user defined offset + device offset */ if (type != IVTV_ENC_STREAM_TYPE_MPG) { struct ivtv_stream *s_mpg = &itv->streams[IVTV_ENC_STREAM_TYPE_MPG];
if (s_mpg->vdev.v4l2_dev)
num = s_mpg->vdev.num + ivtv_stream_info[type].num_offset;
} if (itv->osd_video_pbase && (type == IVTV_DEC_STREAM_TYPE_YUV ||
type == IVTV_DEC_STREAM_TYPE_MPG)) {
s->vdev.device_caps |= V4L2_CAP_VIDEO_OUTPUT_OVERLAY;
itv->v4l2_cap |= V4L2_CAP_VIDEO_OUTPUT_OVERLAY;
}
video_set_drvdata(&s->vdev, s);
/* Register device. First try the desired minor, then any free one. */ if (video_register_device_no_warn(&s->vdev, vfl_type, num)) {
IVTV_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
s->name, num); return -ENOMEM;
}
name = video_device_node_name(&s->vdev);
switch (vfl_type) { case VFL_TYPE_VIDEO:
IVTV_INFO("Registered device %s for %s (%d kB)\n",
name, s->name, itv->options.kilobytes[type]); break; case VFL_TYPE_RADIO:
IVTV_INFO("Registered device %s for %s\n",
name, s->name); break; case VFL_TYPE_VBI: if (itv->options.kilobytes[type])
IVTV_INFO("Registered device %s for %s (%d kB)\n",
name, s->name, itv->options.kilobytes[type]); else
IVTV_INFO("Registered device %s for %s\n",
name, s->name); break;
} return 0;
}
/* Register v4l2 devices */ int ivtv_streams_register(struct ivtv *itv)
{ int type; int err = 0;
/* Register V4L2 devices */ for (type = 0; type < IVTV_MAX_STREAMS; type++)
err |= ivtv_reg_dev(itv, type);
if (err == 0) return 0;
/* One or more streams could not be initialized. Clean 'em all up. */
ivtv_streams_cleanup(itv); return -ENOMEM;
}
/* determine number of lines and total number of VBI bytes. A raw line takes 1443 bytes: 2 * 720 + 4 byte frame header - 1 The '- 1' byte is probably an unused U or V byte. Or something... A sliced line takes 51 bytes: 4 byte frame header, 4 byte internal
header, 42 data bytes + checksum (to be confirmed) */ if (raw) {
lines = itv->vbi.count * 2;
} else {
lines = itv->is_60hz ? 24 : 38; if (itv->is_60hz && (itv->hw_flags & IVTV_HW_CX25840))
lines += 2;
}
/* Note: sliced vs raw flag doesn't seem to have any effect
TODO: check mode (0x02) value with older ivtv versions. */
data[0] = raw | 0x02 | (0xbd << 8);
/* Every X number of frames a VBI interrupt arrives (frames as in 25 or 30 fps) */
data[1] = 1; /* The VBI frames are stored in a ringbuffer with this size (with a VBI frame as unit) */
data[2] = raw ? 4 : 4 * (itv->vbi.raw_size / itv->vbi.enc_size); /* The start/stop codes determine which VBI lines end up in the raw VBI data area. The codes are from table 24 in the saa7115 datasheet. Each raw/sliced/video line is framed with codes FF0000XX where XX is the SAV/EAV (Start/End of Active Video) code. These values for raw VBI are obtained from a driver disassembly. The sliced start/stop codes was deduced from this, but they do not appear in the driver. Other code pairs that I found are: 0x250E6249/0x13545454 and 0x25256262/0x38137F54.
However, I have no idea what these values are for. */ if (itv->hw_flags & IVTV_HW_CX25840) { /* Setup VBI for the cx25840 digitizer */ if (raw) {
data[3] = 0x20602060;
data[4] = 0x30703070;
} else {
data[3] = 0xB0F0B0F0;
data[4] = 0xA0E0A0E0;
} /* Lines per frame */
data[5] = lines; /* bytes per line */
data[6] = (raw ? itv->vbi.raw_size : itv->vbi.sliced_size);
} else { /* Setup VBI for the saa7115 digitizer */ if (raw) {
data[3] = 0x25256262;
data[4] = 0x387F7F7F;
} else {
data[3] = 0xABABECEC;
data[4] = 0xB6F1F1F1;
} /* Lines per frame */
data[5] = lines; /* bytes per line */
data[6] = itv->vbi.enc_size / lines;
}
/* select VBI lines.
Note that the sliced argument seems to have no effect. */ for (i = 2; i <= 24; i++) { int valid;
if (itv->is_60hz) {
valid = i >= 10 && i < 22;
} else {
valid = i >= 6 && i < 24;
}
ivtv_vapi(itv, CX2341X_ENC_SET_VBI_LINE, 5, i - 1,
valid, 0 , 0, 0);
ivtv_vapi(itv, CX2341X_ENC_SET_VBI_LINE, 5, (i - 1) | 0x80000000,
valid, 0, 0, 0);
}
/* Remaining VBI questions: - Is it possible to select particular VBI lines only for inclusion in the MPEG stream? Currently you can only get the first X lines. - Is mixed raw and sliced VBI possible? - What's the meaning of the raw/sliced flag?
- What's the meaning of params 2, 3 & 4 of the Select VBI command? */
}
int ivtv_start_v4l2_encode_stream(struct ivtv_stream *s)
{
u32 data[CX2341X_MBOX_MAX_DATA]; struct ivtv *itv = s->itv; int captype = 0, subtype = 0; int enable_passthrough = 0;
/* Clear Streamoff flags in case left from last capture */
clear_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
if (atomic_read(&itv->capturing) == 0) { int digitizer;
/* Always use frame based mode. Experiments have demonstrated that byte stream based mode results in dropped frames and corruption. Not often, but occasionally. Many thanks go to Leonard Orb who spent a lot of
effort and time trying to trace the cause of the drop outs. */ /* 1 frame per DMA */ /*ivtv_vapi(itv, CX2341X_ENC_SET_DMA_BLOCK_SIZE, 2, 128, 0); */
ivtv_vapi(itv, CX2341X_ENC_SET_DMA_BLOCK_SIZE, 2, 1, 1);
/* Stuff from Windows, we don't know what it is */
ivtv_vapi(itv, CX2341X_ENC_SET_VERT_CROP_LINE, 1, 0); /* According to the docs, this should be correct. However, this is untested. I don't dare enable this without having tested it. Only very few old cards actually have this hardware combination. ivtv_vapi(itv, CX2341X_ENC_SET_VERT_CROP_LINE, 1, ((itv->hw_flags & IVTV_HW_SAA7114) && itv->is_60hz) ? 10001 : 0);
*/
ivtv_vapi(itv, CX2341X_ENC_MISC, 2, 3, !itv->has_cx23415);
ivtv_vapi(itv, CX2341X_ENC_MISC, 2, 8, 0);
ivtv_vapi(itv, CX2341X_ENC_MISC, 2, 4, 1);
ivtv_vapi(itv, CX2341X_ENC_MISC, 1, 12);
/* set audio mode to left/stereo for dual/stereo mode. */
ivtv_vapi(itv, CX2341X_DEC_SET_AUDIO_MODE, 2, itv->audio_bilingual_mode, itv->audio_stereo_mode);
/* set number of internal decoder buffers */
ivtv_vapi(itv, CX2341X_DEC_SET_DISPLAY_BUFFERS, 1, 0);
/* Let things settle before we actually start */
ivtv_msleep_timeout(10, 0);
/* Clear the following Interrupt mask bits for decoding */
ivtv_clear_irq_mask(itv, IVTV_IRQ_MASK_DECODE);
IVTV_DEBUG_IRQ("IRQ Mask is now: 0x%08x\n", itv->irqmask);
/* you're live! sit back and await interrupts :) */
atomic_inc(&itv->decoding); return 0;
}
void ivtv_stop_all_captures(struct ivtv *itv)
{ int i;
for (i = IVTV_MAX_STREAMS - 1; i >= 0; i--) { struct ivtv_stream *s = &itv->streams[i];
if (s->vdev.v4l2_dev == NULL) continue; if (test_bit(IVTV_F_S_STREAMING, &s->s_flags)) {
ivtv_stop_v4l2_encode_stream(s, 0);
}
}
}
int ivtv_stop_v4l2_encode_stream(struct ivtv_stream *s, int gop_end)
{ struct ivtv *itv = s->itv;
DECLARE_WAITQUEUE(wait, current); int cap_type; int stopmode;
if (s->vdev.v4l2_dev == NULL) return -EINVAL;
/* This function assumes that you are allowed to stop the capture
and that we are actually capturing */
IVTV_DEBUG_INFO("Stop Capture\n");
if (s->type == IVTV_DEC_STREAM_TYPE_VOUT) return 0; if (atomic_read(&itv->capturing) == 0) return 0;
switch (s->type) { case IVTV_ENC_STREAM_TYPE_YUV:
cap_type = 1; break; case IVTV_ENC_STREAM_TYPE_PCM:
cap_type = 1; break; case IVTV_ENC_STREAM_TYPE_VBI:
cap_type = 1; break; case IVTV_ENC_STREAM_TYPE_MPG: default:
cap_type = 0; break;
}
if (!test_bit(IVTV_F_S_PASSTHROUGH, &s->s_flags)) { if (s->type == IVTV_ENC_STREAM_TYPE_MPG && gop_end) { /* only run these if we're shutting down the last cap */ unsignedlong duration; unsignedlong then = jiffies;
add_wait_queue(&itv->eos_waitq, &wait);
set_current_state(TASK_INTERRUPTIBLE);
/* wait 2s for EOS interrupt */ while (!test_bit(IVTV_F_I_EOS, &itv->i_flags) &&
time_before(jiffies,
then + msecs_to_jiffies(2000))) {
schedule_timeout(msecs_to_jiffies(10));
}
/* To convert jiffies to ms, we must multiply by 1000 * and divide by HZ. To avoid runtime division, we * convert this to multiplication by 1000/HZ. * Since integer division truncates, we get the best * accuracy if we do a rounding calculation of the constant. * Think of the case where HZ is 1024.
*/
duration = ((1000 + HZ / 2) / HZ) * (jiffies - then);
if (!test_bit(IVTV_F_I_EOS, &itv->i_flags)) {
IVTV_DEBUG_WARN("%s: EOS interrupt not received! stopping anyway.\n", s->name);
IVTV_DEBUG_WARN("%s: waited %lu ms.\n", s->name, duration);
} else {
IVTV_DEBUG_INFO("%s: EOS took %lu ms to occur.\n", s->name, duration);
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&itv->eos_waitq, &wait);
set_bit(IVTV_F_S_STREAMOFF, &s->s_flags);
}
/* Handle any pending interrupts */
ivtv_msleep_timeout(100, 0);
}
atomic_dec(&itv->capturing);
/* Clear capture and no-read bits */
clear_bit(IVTV_F_S_STREAMING, &s->s_flags);
if (s->type == IVTV_ENC_STREAM_TYPE_VBI)
ivtv_set_irq_mask(itv, IVTV_IRQ_ENC_VBI_CAP);
if (atomic_read(&itv->capturing) > 0) { return 0;
}
cx2341x_handler_set_busy(&itv->cxhdl, 0);
/* Set the following Interrupt mask bits for capture */
ivtv_set_irq_mask(itv, IVTV_IRQ_MASK_CAPTURE);
timer_delete(&itv->dma_timer);
/* Raw-passthrough is implied on start. Make sure it's stopped so
the encoder will re-initialize when next started */
ivtv_vapi(itv, CX2341X_ENC_STOP_CAPTURE, 3, 1, 2, 7);
/* Prevent others from starting/stopping streams while we
initiate/terminate passthrough mode */ if (enable) { if (itv->output_mode == OUT_PASSTHROUGH) { return 0;
} if (ivtv_set_output_mode(itv, OUT_PASSTHROUGH) != OUT_PASSTHROUGH) return -EBUSY;
/* Fully initialize stream, and then unflag init */
set_bit(IVTV_F_S_PASSTHROUGH, &dec_stream->s_flags);
set_bit(IVTV_F_S_STREAMING, &dec_stream->s_flags);
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