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linux/drivers/media/pci/saa7164/saa7164-encoder.c

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/*
* Driver for the NXP SAA7164 PCIe bridge
*
* Copyright (c) 2010-2015 Steven Toth <stoth@kernellabs.com>
*
* 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.
*/
#include "saa7164.h"
#define ENCODER_MAX_BITRATE 6500000
#define ENCODER_MIN_BITRATE 1000000
#define ENCODER_DEF_BITRATE 5000000
/*
* This is a dummy non-zero value for the sizeimage field of v4l2_pix_format.
* It is not actually used for anything since this driver does not support
* stream I/O, only read(), and because this driver produces an MPEG stream
* and not discrete frames. But the V4L2 spec doesn't allow for this value
* to be 0, so set it to 0x10000 instead.
*
* If we ever change this driver to support stream I/O, then this field
* will be the size of the streaming buffers.
*/
#define SAA7164_SIZEIMAGE (0x10000)
static struct saa7164_tvnorm saa7164_tvnorms[] = {
{
.name = "NTSC-M",
.id = V4L2_STD_NTSC_M,
}, {
.name = "NTSC-JP",
.id = V4L2_STD_NTSC_M_JP,
}
};
/* Take the encoder configuration form the port struct and
* flush it to the hardware.
*/
static void saa7164_encoder_configure(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
dprintk(DBGLVL_ENC, "%s()\n", __func__);
port->encoder_params.width = port->width;
port->encoder_params.height = port->height;
port->encoder_params.is_50hz =
(port->encodernorm.id & V4L2_STD_625_50) != 0;
/* Set up the DIF (enable it) for analog mode by default */
saa7164_api_initialize_dif(port);
/* Configure the correct video standard */
saa7164_api_configure_dif(port, port->encodernorm.id);
/* Ensure the audio decoder is correct configured */
saa7164_api_set_audio_std(port);
}
static int saa7164_encoder_buffers_dealloc(struct saa7164_port *port)
{
struct list_head *c, *n, *p, *q, *l, *v;
struct saa7164_dev *dev = port->dev;
struct saa7164_buffer *buf;
struct saa7164_user_buffer *ubuf;
/* Remove any allocated buffers */
mutex_lock(&port->dmaqueue_lock);
dprintk(DBGLVL_ENC, "%s(port=%d) dmaqueue\n", __func__, port->nr);
list_for_each_safe(c, n, &port->dmaqueue.list) {
buf = list_entry(c, struct saa7164_buffer, list);
list_del(c);
saa7164_buffer_dealloc(buf);
}
dprintk(DBGLVL_ENC, "%s(port=%d) used\n", __func__, port->nr);
list_for_each_safe(p, q, &port->list_buf_used.list) {
ubuf = list_entry(p, struct saa7164_user_buffer, list);
list_del(p);
saa7164_buffer_dealloc_user(ubuf);
}
dprintk(DBGLVL_ENC, "%s(port=%d) free\n", __func__, port->nr);
list_for_each_safe(l, v, &port->list_buf_free.list) {
ubuf = list_entry(l, struct saa7164_user_buffer, list);
list_del(l);
saa7164_buffer_dealloc_user(ubuf);
}
mutex_unlock(&port->dmaqueue_lock);
dprintk(DBGLVL_ENC, "%s(port=%d) done\n", __func__, port->nr);
return 0;
}
/* Dynamic buffer switch at encoder start time */
static int saa7164_encoder_buffers_alloc(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
struct saa7164_buffer *buf;
struct saa7164_user_buffer *ubuf;
struct tmHWStreamParameters *params = &port->hw_streamingparams;
int result = -ENODEV, i;
int len = 0;
dprintk(DBGLVL_ENC, "%s()\n", __func__);
if (port->encoder_params.stream_type ==
V4L2_MPEG_STREAM_TYPE_MPEG2_PS) {
dprintk(DBGLVL_ENC,
"%s() type=V4L2_MPEG_STREAM_TYPE_MPEG2_PS\n",
__func__);
params->samplesperline = 128;
params->numberoflines = 256;
params->pitch = 128;
params->numpagetables = 2 +
((SAA7164_PS_NUMBER_OF_LINES * 128) / PAGE_SIZE);
} else
if (port->encoder_params.stream_type ==
V4L2_MPEG_STREAM_TYPE_MPEG2_TS) {
dprintk(DBGLVL_ENC,
"%s() type=V4L2_MPEG_STREAM_TYPE_MPEG2_TS\n",
__func__);
params->samplesperline = 188;
params->numberoflines = 312;
params->pitch = 188;
params->numpagetables = 2 +
((SAA7164_TS_NUMBER_OF_LINES * 188) / PAGE_SIZE);
} else
BUG();
/* Init and establish defaults */
params->bitspersample = 8;
params->linethreshold = 0;
params->pagetablelistvirt = NULL;
params->pagetablelistphys = NULL;
params->numpagetableentries = port->hwcfg.buffercount;
/* Allocate the PCI resources, buffers (hard) */
for (i = 0; i < port->hwcfg.buffercount; i++) {
buf = saa7164_buffer_alloc(port,
params->numberoflines *
params->pitch);
if (!buf) {
printk(KERN_ERR "%s() failed (errno = %d), unable to allocate buffer\n",
__func__, result);
result = -ENOMEM;
goto failed;
} else {
mutex_lock(&port->dmaqueue_lock);
list_add_tail(&buf->list, &port->dmaqueue.list);
mutex_unlock(&port->dmaqueue_lock);
}
}
/* Allocate some kernel buffers for copying
* to userpsace.
*/
len = params->numberoflines * params->pitch;
if (encoder_buffers < 16)
encoder_buffers = 16;
if (encoder_buffers > 512)
encoder_buffers = 512;
for (i = 0; i < encoder_buffers; i++) {
ubuf = saa7164_buffer_alloc_user(dev, len);
if (ubuf) {
mutex_lock(&port->dmaqueue_lock);
list_add_tail(&ubuf->list, &port->list_buf_free.list);
mutex_unlock(&port->dmaqueue_lock);
}
}
result = 0;
failed:
return result;
}
static int saa7164_encoder_initialize(struct saa7164_port *port)
{
saa7164_encoder_configure(port);
return 0;
}
/* -- V4L2 --------------------------------------------------------- */
int saa7164_s_std(struct saa7164_port *port, v4l2_std_id id)
{
struct saa7164_dev *dev = port->dev;
unsigned int i;
dprintk(DBGLVL_ENC, "%s(id=0x%x)\n", __func__, (u32)id);
for (i = 0; i < ARRAY_SIZE(saa7164_tvnorms); i++) {
if (id & saa7164_tvnorms[i].id)
break;
}
if (i == ARRAY_SIZE(saa7164_tvnorms))
return -EINVAL;
port->encodernorm = saa7164_tvnorms[i];
port->std = id;
/* Update the audio decoder while is not running in
* auto detect mode.
*/
saa7164_api_set_audio_std(port);
dprintk(DBGLVL_ENC, "%s(id=0x%x) OK\n", __func__, (u32)id);
return 0;
}
static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
{
struct saa7164_encoder_fh *fh = file->private_data;
return saa7164_s_std(fh->port, id);
}
int saa7164_g_std(struct saa7164_port *port, v4l2_std_id *id)
{
*id = port->std;
return 0;
}
static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
{
struct saa7164_encoder_fh *fh = file->private_data;
return saa7164_g_std(fh->port, id);
}
int saa7164_enum_input(struct file *file, void *priv, struct v4l2_input *i)
{
static const char * const inputs[] = {
"tuner", "composite", "svideo", "aux",
"composite 2", "svideo 2", "aux 2"
};
int n;
if (i->index >= 7)
return -EINVAL;
strscpy(i->name, inputs[i->index], sizeof(i->name));
if (i->index == 0)
i->type = V4L2_INPUT_TYPE_TUNER;
else
i->type = V4L2_INPUT_TYPE_CAMERA;
for (n = 0; n < ARRAY_SIZE(saa7164_tvnorms); n++)
i->std |= saa7164_tvnorms[n].id;
return 0;
}
int saa7164_g_input(struct saa7164_port *port, unsigned int *i)
{
struct saa7164_dev *dev = port->dev;
if (saa7164_api_get_videomux(port) != SAA_OK)
return -EIO;
*i = (port->mux_input - 1);
dprintk(DBGLVL_ENC, "%s() input=%d\n", __func__, *i);
return 0;
}
static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
struct saa7164_encoder_fh *fh = file->private_data;
return saa7164_g_input(fh->port, i);
}
int saa7164_s_input(struct saa7164_port *port, unsigned int i)
{
struct saa7164_dev *dev = port->dev;
dprintk(DBGLVL_ENC, "%s() input=%d\n", __func__, i);
if (i >= 7)
return -EINVAL;
port->mux_input = i + 1;
if (saa7164_api_set_videomux(port) != SAA_OK)
return -EIO;
return 0;
}
static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
struct saa7164_encoder_fh *fh = file->private_data;
return saa7164_s_input(fh->port, i);
}
int saa7164_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
{
struct saa7164_encoder_fh *fh = file->private_data;
struct saa7164_port *port = fh->port;
struct saa7164_dev *dev = port->dev;
if (0 != t->index)
return -EINVAL;
strscpy(t->name, "tuner", sizeof(t->name));
t->capability = V4L2_TUNER_CAP_NORM | V4L2_TUNER_CAP_STEREO;
t->rangelow = SAA7164_TV_MIN_FREQ;
t->rangehigh = SAA7164_TV_MAX_FREQ;
dprintk(DBGLVL_ENC, "VIDIOC_G_TUNER: tuner type %d\n", t->type);
return 0;
}
int saa7164_s_tuner(struct file *file, void *priv,
const struct v4l2_tuner *t)
{
if (0 != t->index)
return -EINVAL;
/* Update the A/V core */
return 0;
}
int saa7164_g_frequency(struct saa7164_port *port, struct v4l2_frequency *f)
{
if (f->tuner)
return -EINVAL;
f->frequency = port->freq;
return 0;
}
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct saa7164_encoder_fh *fh = file->private_data;
return saa7164_g_frequency(fh->port, f);
}
int saa7164_s_frequency(struct saa7164_port *port,
const struct v4l2_frequency *f)
{
struct saa7164_dev *dev = port->dev;
struct saa7164_port *tsport;
struct dvb_frontend *fe;
/* TODO: Pull this for the std */
struct analog_parameters params = {
.mode = V4L2_TUNER_ANALOG_TV,
.audmode = V4L2_TUNER_MODE_STEREO,
.std = port->encodernorm.id,
.frequency = f->frequency
};
/* Stop the encoder */
dprintk(DBGLVL_ENC, "%s() frequency=%d tuner=%d\n", __func__,
f->frequency, f->tuner);
if (f->tuner != 0)
return -EINVAL;
port->freq = clamp(f->frequency,
SAA7164_TV_MIN_FREQ, SAA7164_TV_MAX_FREQ);
/* Update the hardware */
if (port->nr == SAA7164_PORT_ENC1)
tsport = &dev->ports[SAA7164_PORT_TS1];
else if (port->nr == SAA7164_PORT_ENC2)
tsport = &dev->ports[SAA7164_PORT_TS2];
else
BUG();
fe = tsport->dvb.frontend;
if (fe && fe->ops.tuner_ops.set_analog_params)
fe->ops.tuner_ops.set_analog_params(fe, &params);
else
printk(KERN_ERR "%s() No analog tuner, aborting\n", __func__);
saa7164_encoder_initialize(port);
return 0;
}
static int vidioc_s_frequency(struct file *file, void *priv,
const struct v4l2_frequency *f)
{
struct saa7164_encoder_fh *fh = file->private_data;
return saa7164_s_frequency(fh->port, f);
}
static int saa7164_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct saa7164_port *port =
container_of(ctrl->handler, struct saa7164_port, ctrl_handler);
struct saa7164_encoder_params *params = &port->encoder_params;
int ret = 0;
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
port->ctl_brightness = ctrl->val;
saa7164_api_set_usercontrol(port, PU_BRIGHTNESS_CONTROL);
break;
case V4L2_CID_CONTRAST:
port->ctl_contrast = ctrl->val;
saa7164_api_set_usercontrol(port, PU_CONTRAST_CONTROL);
break;
case V4L2_CID_SATURATION:
port->ctl_saturation = ctrl->val;
saa7164_api_set_usercontrol(port, PU_SATURATION_CONTROL);
break;
case V4L2_CID_HUE:
port->ctl_hue = ctrl->val;
saa7164_api_set_usercontrol(port, PU_HUE_CONTROL);
break;
case V4L2_CID_SHARPNESS:
port->ctl_sharpness = ctrl->val;
saa7164_api_set_usercontrol(port, PU_SHARPNESS_CONTROL);
break;
case V4L2_CID_AUDIO_VOLUME:
port->ctl_volume = ctrl->val;
saa7164_api_set_audio_volume(port, port->ctl_volume);
break;
case V4L2_CID_MPEG_VIDEO_BITRATE:
params->bitrate = ctrl->val;
break;
case V4L2_CID_MPEG_STREAM_TYPE:
params->stream_type = ctrl->val;
break;
case V4L2_CID_MPEG_AUDIO_MUTE:
params->ctl_mute = ctrl->val;
ret = saa7164_api_audio_mute(port, params->ctl_mute);
if (ret != SAA_OK) {
printk(KERN_ERR "%s() error, ret = 0x%x\n", __func__,
ret);
ret = -EIO;
}
break;
case V4L2_CID_MPEG_VIDEO_ASPECT:
params->ctl_aspect = ctrl->val;
ret = saa7164_api_set_aspect_ratio(port);
if (ret != SAA_OK) {
printk(KERN_ERR "%s() error, ret = 0x%x\n", __func__,
ret);
ret = -EIO;
}
break;
case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
params->bitrate_mode = ctrl->val;
break;
case V4L2_CID_MPEG_VIDEO_B_FRAMES:
params->refdist = ctrl->val;
break;
case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
params->bitrate_peak = ctrl->val;
break;
case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
params->gop_size = ctrl->val;
break;
default:
ret = -EINVAL;
}
return ret;
}
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct saa7164_encoder_fh *fh = file->private_data;
struct saa7164_port *port = fh->port;
struct saa7164_dev *dev = port->dev;
strscpy(cap->driver, dev->name, sizeof(cap->driver));
strscpy(cap->card, saa7164_boards[dev->board].name,
sizeof(cap->card));
sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
cap->device_caps =
V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_READWRITE |
V4L2_CAP_TUNER;
cap->capabilities = cap->device_caps |
V4L2_CAP_VBI_CAPTURE |
V4L2_CAP_DEVICE_CAPS;
return 0;
}
static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
if (f->index != 0)
return -EINVAL;
strscpy(f->description, "MPEG", sizeof(f->description));
f->pixelformat = V4L2_PIX_FMT_MPEG;
return 0;
}
static int vidioc_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct saa7164_encoder_fh *fh = file->private_data;
struct saa7164_port *port = fh->port;
f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG;
f->fmt.pix.bytesperline = 0;
f->fmt.pix.sizeimage = SAA7164_SIZEIMAGE;
f->fmt.pix.field = V4L2_FIELD_INTERLACED;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
f->fmt.pix.width = port->width;
f->fmt.pix.height = port->height;
return 0;
}
static int saa7164_encoder_stop_port(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
int ret;
ret = saa7164_api_transition_port(port, SAA_DMASTATE_STOP);
if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) {
printk(KERN_ERR "%s() stop transition failed, ret = 0x%x\n",
__func__, ret);
ret = -EIO;
} else {
dprintk(DBGLVL_ENC, "%s() Stopped\n", __func__);
ret = 0;
}
return ret;
}
static int saa7164_encoder_acquire_port(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
int ret;
ret = saa7164_api_transition_port(port, SAA_DMASTATE_ACQUIRE);
if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) {
printk(KERN_ERR "%s() acquire transition failed, ret = 0x%x\n",
__func__, ret);
ret = -EIO;
} else {
dprintk(DBGLVL_ENC, "%s() Acquired\n", __func__);
ret = 0;
}
return ret;
}
static int saa7164_encoder_pause_port(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
int ret;
ret = saa7164_api_transition_port(port, SAA_DMASTATE_PAUSE);
if ((ret != SAA_OK) && (ret != SAA_ERR_ALREADY_STOPPED)) {
printk(KERN_ERR "%s() pause transition failed, ret = 0x%x\n",
__func__, ret);
ret = -EIO;
} else {
dprintk(DBGLVL_ENC, "%s() Paused\n", __func__);
ret = 0;
}
return ret;
}
/* Firmware is very windows centric, meaning you have to transition
* the part through AVStream / KS Windows stages, forwards or backwards.
* States are: stopped, acquired (h/w), paused, started.
* We have to leave here will all of the soft buffers on the free list,
* else the cfg_post() func won't have soft buffers to correctly configure.
*/
static int saa7164_encoder_stop_streaming(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
struct saa7164_buffer *buf;
struct saa7164_user_buffer *ubuf;
struct list_head *c, *n;
int ret;
dprintk(DBGLVL_ENC, "%s(port=%d)\n", __func__, port->nr);
ret = saa7164_encoder_pause_port(port);
ret = saa7164_encoder_acquire_port(port);
ret = saa7164_encoder_stop_port(port);
dprintk(DBGLVL_ENC, "%s(port=%d) Hardware stopped\n", __func__,
port->nr);
/* Reset the state of any allocated buffer resources */
mutex_lock(&port->dmaqueue_lock);
/* Reset the hard and soft buffer state */
list_for_each_safe(c, n, &port->dmaqueue.list) {
buf = list_entry(c, struct saa7164_buffer, list);
buf->flags = SAA7164_BUFFER_FREE;
buf->pos = 0;
}
list_for_each_safe(c, n, &port->list_buf_used.list) {
ubuf = list_entry(c, struct saa7164_user_buffer, list);
ubuf->pos = 0;
list_move_tail(&ubuf->list, &port->list_buf_free.list);
}
mutex_unlock(&port->dmaqueue_lock);
/* Free any allocated resources */
saa7164_encoder_buffers_dealloc(port);
dprintk(DBGLVL_ENC, "%s(port=%d) Released\n", __func__, port->nr);
return ret;
}
static int saa7164_encoder_start_streaming(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
int result, ret = 0;
dprintk(DBGLVL_ENC, "%s(port=%d)\n", __func__, port->nr);
port->done_first_interrupt = 0;
/* allocate all of the PCIe DMA buffer resources on the fly,
* allowing switching between TS and PS payloads without
* requiring a complete driver reload.
*/
saa7164_encoder_buffers_alloc(port);
/* Configure the encoder with any cache values */
saa7164_api_set_encoder(port);
saa7164_api_get_encoder(port);
/* Place the empty buffers on the hardware */
saa7164_buffer_cfg_port(port);
/* Acquire the hardware */
result = saa7164_api_transition_port(port, SAA_DMASTATE_ACQUIRE);
if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
printk(KERN_ERR "%s() acquire transition failed, res = 0x%x\n",
__func__, result);
/* Stop the hardware, regardless */
result = saa7164_api_transition_port(port, SAA_DMASTATE_STOP);
if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
printk(KERN_ERR "%s() acquire/forced stop transition failed, res = 0x%x\n",
__func__, result);
}
ret = -EIO;
goto out;
} else
dprintk(DBGLVL_ENC, "%s() Acquired\n", __func__);
/* Pause the hardware */
result = saa7164_api_transition_port(port, SAA_DMASTATE_PAUSE);
if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
printk(KERN_ERR "%s() pause transition failed, res = 0x%x\n",
__func__, result);
/* Stop the hardware, regardless */
result = saa7164_api_transition_port(port, SAA_DMASTATE_STOP);
if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
printk(KERN_ERR "%s() pause/forced stop transition failed, res = 0x%x\n",
__func__, result);
}
ret = -EIO;
goto out;
} else
dprintk(DBGLVL_ENC, "%s() Paused\n", __func__);
/* Start the hardware */
result = saa7164_api_transition_port(port, SAA_DMASTATE_RUN);
if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
printk(KERN_ERR "%s() run transition failed, result = 0x%x\n",
__func__, result);
/* Stop the hardware, regardless */
result = saa7164_api_transition_port(port, SAA_DMASTATE_STOP);
if ((result != SAA_OK) && (result != SAA_ERR_ALREADY_STOPPED)) {
printk(KERN_ERR "%s() run/forced stop transition failed, res = 0x%x\n",
__func__, result);
}
ret = -EIO;
} else
dprintk(DBGLVL_ENC, "%s() Running\n", __func__);
out:
return ret;
}
static int fops_open(struct file *file)
{
struct saa7164_dev *dev;
struct saa7164_port *port;
struct saa7164_encoder_fh *fh;
port = (struct saa7164_port *)video_get_drvdata(video_devdata(file));
if (!port)
return -ENODEV;
dev = port->dev;
dprintk(DBGLVL_ENC, "%s()\n", __func__);
/* allocate + initialize per filehandle data */
fh = kzalloc(sizeof(*fh), GFP_KERNEL);
if (NULL == fh)
return -ENOMEM;
fh->port = port;
v4l2_fh_init(&fh->fh, video_devdata(file));
v4l2_fh_add(&fh->fh);
file->private_data = fh;
return 0;
}
static int fops_release(struct file *file)
{
struct saa7164_encoder_fh *fh = file->private_data;
struct saa7164_port *port = fh->port;
struct saa7164_dev *dev = port->dev;
dprintk(DBGLVL_ENC, "%s()\n", __func__);
/* Shut device down on last close */
if (atomic_cmpxchg(&fh->v4l_reading, 1, 0) == 1) {
if (atomic_dec_return(&port->v4l_reader_count) == 0) {
/* stop mpeg capture then cancel buffers */
saa7164_encoder_stop_streaming(port);
}
}
v4l2_fh_del(&fh->fh);
v4l2_fh_exit(&fh->fh);
kfree(fh);
return 0;
}
static struct
saa7164_user_buffer *saa7164_enc_next_buf(struct saa7164_port *port)
{
struct saa7164_user_buffer *ubuf = NULL;
struct saa7164_dev *dev = port->dev;
u32 crc;
mutex_lock(&port->dmaqueue_lock);
if (!list_empty(&port->list_buf_used.list)) {
ubuf = list_first_entry(&port->list_buf_used.list,
struct saa7164_user_buffer, list);
if (crc_checking) {
crc = crc32(0, ubuf->data, ubuf->actual_size);
if (crc != ubuf->crc) {
printk(KERN_ERR
"%s() ubuf %p crc became invalid, was 0x%x became 0x%x\n",
__func__,
ubuf, ubuf->crc, crc);
}
}
}
mutex_unlock(&port->dmaqueue_lock);
dprintk(DBGLVL_ENC, "%s() returns %p\n", __func__, ubuf);
return ubuf;
}
static ssize_t fops_read(struct file *file, char __user *buffer,
size_t count, loff_t *pos)
{
struct saa7164_encoder_fh *fh = file->private_data;
struct saa7164_port *port = fh->port;
struct saa7164_user_buffer *ubuf = NULL;
struct saa7164_dev *dev = port->dev;
int ret = 0;
int rem, cnt;
u8 *p;
port->last_read_msecs_diff = port->last_read_msecs;
port->last_read_msecs = jiffies_to_msecs(jiffies);
port->last_read_msecs_diff = port->last_read_msecs -
port->last_read_msecs_diff;
saa7164_histogram_update(&port->read_interval,
port->last_read_msecs_diff);
if (*pos) {
printk(KERN_ERR "%s() ESPIPE\n", __func__);
return -ESPIPE;
}
if (atomic_cmpxchg(&fh->v4l_reading, 0, 1) == 0) {
if (atomic_inc_return(&port->v4l_reader_count) == 1) {
if (saa7164_encoder_initialize(port) < 0) {
printk(KERN_ERR "%s() EINVAL\n", __func__);
return -EINVAL;
}
saa7164_encoder_start_streaming(port);
msleep(200);
}
}
/* blocking wait for buffer */
if ((file->f_flags & O_NONBLOCK) == 0) {
if (wait_event_interruptible(port->wait_read,
saa7164_enc_next_buf(port))) {
printk(KERN_ERR "%s() ERESTARTSYS\n", __func__);
return -ERESTARTSYS;
}
}
/* Pull the first buffer from the used list */
ubuf = saa7164_enc_next_buf(port);
while ((count > 0) && ubuf) {
/* set remaining bytes to copy */
rem = ubuf->actual_size - ubuf->pos;
cnt = rem > count ? count : rem;
p = ubuf->data + ubuf->pos;
dprintk(DBGLVL_ENC,
"%s() count=%d cnt=%d rem=%d buf=%p buf->pos=%d\n",
__func__, (int)count, cnt, rem, ubuf, ubuf->pos);
if (copy_to_user(buffer, p, cnt)) {
printk(KERN_ERR "%s() copy_to_user failed\n", __func__);
if (!ret) {
printk(KERN_ERR "%s() EFAULT\n", __func__);
ret = -EFAULT;
}
goto err;
}
ubuf->pos += cnt;
count -= cnt;
buffer += cnt;
ret += cnt;
if (ubuf->pos > ubuf->actual_size)
printk(KERN_ERR "read() pos > actual, huh?\n");
if (ubuf->pos == ubuf->actual_size) {
/* finished with current buffer, take next buffer */
/* Requeue the buffer on the free list */
ubuf->pos = 0;
mutex_lock(&port->dmaqueue_lock);
list_move_tail(&ubuf->list, &port->list_buf_free.list);
mutex_unlock(&port->dmaqueue_lock);
/* Dequeue next */
if ((file->f_flags & O_NONBLOCK) == 0) {
if (wait_event_interruptible(port->wait_read,
saa7164_enc_next_buf(port))) {
break;
}
}
ubuf = saa7164_enc_next_buf(port);
}
}
err:
if (!ret && !ubuf)
ret = -EAGAIN;
return ret;
}
static __poll_t fops_poll(struct file *file, poll_table *wait)
{
__poll_t req_events = poll_requested_events(wait);
struct saa7164_encoder_fh *fh =
(struct saa7164_encoder_fh *)file->private_data;
struct saa7164_port *port = fh->port;
__poll_t mask = v4l2_ctrl_poll(file, wait);
port->last_poll_msecs_diff = port->last_poll_msecs;
port->last_poll_msecs = jiffies_to_msecs(jiffies);
port->last_poll_msecs_diff = port->last_poll_msecs -
port->last_poll_msecs_diff;
saa7164_histogram_update(&port->poll_interval,
port->last_poll_msecs_diff);
if (!(req_events & (EPOLLIN | EPOLLRDNORM)))
return mask;
if (atomic_cmpxchg(&fh->v4l_reading, 0, 1) == 0) {
if (atomic_inc_return(&port->v4l_reader_count) == 1) {
if (saa7164_encoder_initialize(port) < 0)
return mask | EPOLLERR;
saa7164_encoder_start_streaming(port);
msleep(200);
}
}
/* Pull the first buffer from the used list */
if (!list_empty(&port->list_buf_used.list))
mask |= EPOLLIN | EPOLLRDNORM;
return mask;
}
static const struct v4l2_ctrl_ops saa7164_ctrl_ops = {
.s_ctrl = saa7164_s_ctrl,
};
static const struct v4l2_file_operations mpeg_fops = {
.owner = THIS_MODULE,
.open = fops_open,
.release = fops_release,
.read = fops_read,
.poll = fops_poll,
.unlocked_ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops mpeg_ioctl_ops = {
.vidioc_s_std = vidioc_s_std,
.vidioc_g_std = vidioc_g_std,
.vidioc_enum_input = saa7164_enum_input,
.vidioc_g_input = vidioc_g_input,
.vidioc_s_input = vidioc_s_input,
.vidioc_g_tuner = saa7164_g_tuner,
.vidioc_s_tuner = saa7164_s_tuner,
.vidioc_g_frequency = vidioc_g_frequency,
.vidioc_s_frequency = vidioc_s_frequency,
.vidioc_querycap = vidioc_querycap,
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = vidioc_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = vidioc_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = vidioc_fmt_vid_cap,
.vidioc_log_status = v4l2_ctrl_log_status,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
static struct video_device saa7164_mpeg_template = {
.name = "saa7164",
.fops = &mpeg_fops,
.ioctl_ops = &mpeg_ioctl_ops,
.minor = -1,
.tvnorms = SAA7164_NORMS,
};
static struct video_device *saa7164_encoder_alloc(
struct saa7164_port *port,
struct pci_dev *pci,
struct video_device *template,
char *type)
{
struct video_device *vfd;
struct saa7164_dev *dev = port->dev;
dprintk(DBGLVL_ENC, "%s()\n", __func__);
vfd = video_device_alloc();
if (NULL == vfd)
return NULL;
*vfd = *template;
snprintf(vfd->name, sizeof(vfd->name), "%s %s (%s)", dev->name,
type, saa7164_boards[dev->board].name);
vfd->v4l2_dev = &dev->v4l2_dev;
vfd->release = video_device_release;
return vfd;
}
int saa7164_encoder_register(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
struct v4l2_ctrl_handler *hdl = &port->ctrl_handler;
int result = -ENODEV;
dprintk(DBGLVL_ENC, "%s()\n", __func__);
BUG_ON(port->type != SAA7164_MPEG_ENCODER);
/* Sanity check that the PCI configuration space is active */
if (port->hwcfg.BARLocation == 0) {
printk(KERN_ERR "%s() failed (errno = %d), NO PCI configuration\n",
__func__, result);
result = -ENOMEM;
goto failed;
}
/* Establish encoder defaults here */
/* Set default TV standard */
port->encodernorm = saa7164_tvnorms[0];
port->width = 720;
port->mux_input = 1; /* Composite */
port->video_format = EU_VIDEO_FORMAT_MPEG_2;
port->audio_format = 0;
port->video_resolution = 0;
port->freq = SAA7164_TV_MIN_FREQ;
v4l2_ctrl_handler_init(hdl, 14);
v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
V4L2_CID_BRIGHTNESS, 0, 255, 1, 127);
v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
V4L2_CID_CONTRAST, 0, 255, 1, 66);
v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
V4L2_CID_SATURATION, 0, 255, 1, 62);
v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
V4L2_CID_HUE, 0, 255, 1, 128);
v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
V4L2_CID_SHARPNESS, 0x0, 0x0f, 1, 8);
v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
V4L2_CID_MPEG_AUDIO_MUTE, 0x0, 0x01, 1, 0);
v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
V4L2_CID_AUDIO_VOLUME, -83, 24, 1, 20);
v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
V4L2_CID_MPEG_VIDEO_BITRATE,
ENCODER_MIN_BITRATE, ENCODER_MAX_BITRATE,
100000, ENCODER_DEF_BITRATE);
v4l2_ctrl_new_std_menu(hdl, &saa7164_ctrl_ops,
V4L2_CID_MPEG_STREAM_TYPE,
V4L2_MPEG_STREAM_TYPE_MPEG2_TS, 0,
V4L2_MPEG_STREAM_TYPE_MPEG2_PS);
v4l2_ctrl_new_std_menu(hdl, &saa7164_ctrl_ops,
V4L2_CID_MPEG_VIDEO_ASPECT,
V4L2_MPEG_VIDEO_ASPECT_221x100, 0,
V4L2_MPEG_VIDEO_ASPECT_4x3);
v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
V4L2_CID_MPEG_VIDEO_GOP_SIZE, 1, 255, 1, 15);
v4l2_ctrl_new_std_menu(hdl, &saa7164_ctrl_ops,
V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
V4L2_MPEG_VIDEO_BITRATE_MODE_CBR, 0,
V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
V4L2_CID_MPEG_VIDEO_B_FRAMES, 1, 3, 1, 1);
v4l2_ctrl_new_std(hdl, &saa7164_ctrl_ops,
V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
ENCODER_MIN_BITRATE, ENCODER_MAX_BITRATE,
100000, ENCODER_DEF_BITRATE);
if (hdl->error) {
result = hdl->error;
goto failed;
}
port->std = V4L2_STD_NTSC_M;
if (port->encodernorm.id & V4L2_STD_525_60)
port->height = 480;
else
port->height = 576;
/* Allocate and register the video device node */
port->v4l_device = saa7164_encoder_alloc(port,
dev->pci, &saa7164_mpeg_template, "mpeg");
if (!port->v4l_device) {
printk(KERN_INFO "%s: can't allocate mpeg device\n",
dev->name);
result = -ENOMEM;
goto failed;
}
port->v4l_device->ctrl_handler = hdl;
v4l2_ctrl_handler_setup(hdl);
video_set_drvdata(port->v4l_device, port);
result = video_register_device(port->v4l_device,
VFL_TYPE_GRABBER, -1);
if (result < 0) {
printk(KERN_INFO "%s: can't register mpeg device\n",
dev->name);
/* TODO: We're going to leak here if we don't dealloc
The buffers above. The unreg function can't deal wit it.
*/
goto failed;
}
printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
dev->name, port->v4l_device->num);
/* Configure the hardware defaults */
saa7164_api_set_videomux(port);
saa7164_api_set_usercontrol(port, PU_BRIGHTNESS_CONTROL);
saa7164_api_set_usercontrol(port, PU_CONTRAST_CONTROL);
saa7164_api_set_usercontrol(port, PU_HUE_CONTROL);
saa7164_api_set_usercontrol(port, PU_SATURATION_CONTROL);
saa7164_api_set_usercontrol(port, PU_SHARPNESS_CONTROL);
saa7164_api_audio_mute(port, 0);
saa7164_api_set_audio_volume(port, 20);
saa7164_api_set_aspect_ratio(port);
/* Disable audio standard detection, it's buggy */
saa7164_api_set_audio_detection(port, 0);
saa7164_api_set_encoder(port);
saa7164_api_get_encoder(port);
result = 0;
failed:
return result;
}
void saa7164_encoder_unregister(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
dprintk(DBGLVL_ENC, "%s(port=%d)\n", __func__, port->nr);
BUG_ON(port->type != SAA7164_MPEG_ENCODER);
if (port->v4l_device) {
if (port->v4l_device->minor != -1)
video_unregister_device(port->v4l_device);
else
video_device_release(port->v4l_device);
port->v4l_device = NULL;
}
v4l2_ctrl_handler_free(&port->ctrl_handler);
dprintk(DBGLVL_ENC, "%s(port=%d) done\n", __func__, port->nr);
}
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