static int vpif_s_output(struct file *file, void *priv, unsigned int i)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct video_obj *vid_ch = &ch->video;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
int ret = 0;
if (mutex_lock_interruptible(&common->lock))
return -ERESTARTSYS;
if (common->started) {
vpif_err("Streaming in progress\n");
ret = -EBUSY;
goto s_output_exit;
}
ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
s_routing, 0, i, 0);
if (ret < 0)
vpif_err("Failed to set output standard\n");
vid_ch->output_id = i;
s_output_exit:
mutex_unlock(&common->lock);
return ret;
}
static int vpif_open(struct file *filep)
{
struct vpif_capture_config *config = vpif_dev->platform_data;
struct video_device *vdev = video_devdata(filep);
struct common_obj *common;
struct video_obj *vid_ch;
struct channel_obj *ch;
struct vpif_fh *fh;
int i;
vpif_dbg(2, debug, "vpif_open\n");
ch = video_get_drvdata(vdev);
vid_ch = &ch->video;
common = &ch->common[VPIF_VIDEO_INDEX];
if (NULL == ch->curr_subdev_info) {
for (i = 0; i < config->subdev_count; i++) {
if (vpif_obj.sd[i]) {
ch->curr_subdev_info = &config->subdev_info[i];
vid_ch->input_idx = 0;
break;
}
}
if (i == config->subdev_count) {
vpif_err("No sub device registered\n");
return -ENOENT;
}
}
fh = kzalloc(sizeof(struct vpif_fh), GFP_KERNEL);
if (NULL == fh) {
vpif_err("unable to allocate memory for file handle object\n");
return -ENOMEM;
}
filep->private_data = fh;
fh->channel = ch;
fh->initialized = 0;
if (!ch->initialized) {
fh->initialized = 1;
ch->initialized = 1;
memset(&(ch->vpifparams), 0, sizeof(struct vpif_params));
}
ch->usrs++;
fh->io_allowed[VPIF_VIDEO_INDEX] = 0;
fh->prio = V4L2_PRIORITY_UNSET;
v4l2_prio_open(&ch->prio, &fh->prio);
return 0;
}
static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
int ret = 0;
if (!(*std_id & DM646X_V4L2_STD))
return -EINVAL;
if (common->started) {
vpif_err("streaming in progress\n");
return -EBUSY;
}
/* Call encoder subdevice function to set the standard */
if (mutex_lock_interruptible(&common->lock))
return -ERESTARTSYS;
ch->video.stdid = *std_id;
/* Get the information about the standard */
if (vpif_get_std_info(ch)) {
vpif_err("Error getting the standard info\n");
return -EINVAL;
}
if ((ch->vpifparams.std_info.width *
ch->vpifparams.std_info.height * 2) >
config_params.channel_bufsize[ch->channel_id]) {
vpif_err("invalid std for this size\n");
ret = -EINVAL;
goto s_std_exit;
}
common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width;
/* Configure the default format information */
vpif_config_format(ch);
ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
s_std_output, *std_id);
if (ret < 0) {
vpif_err("Failed to set output standard\n");
goto s_std_exit;
}
ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, core,
s_std, *std_id);
if (ret < 0)
vpif_err("Failed to set standard for sub devices\n");
s_std_exit:
mutex_unlock(&common->lock);
return ret;
}
/**
* vpif_s_std() - set STD handler
* @file: file ptr
* @priv: file handle
* @std_id: ptr to std id
*/
static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
int ret = 0;
vpif_dbg(2, debug, "vpif_s_std\n");
if (common->started) {
vpif_err("streaming in progress\n");
return -EBUSY;
}
if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
(VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
if (!fh->initialized) {
vpif_dbg(1, debug, "Channel Busy\n");
return -EBUSY;
}
}
ret = v4l2_prio_check(&ch->prio, fh->prio);
if (0 != ret)
return ret;
fh->initialized = 1;
/* Call encoder subdevice function to set the standard */
if (mutex_lock_interruptible(&common->lock))
return -ERESTARTSYS;
ch->video.stdid = *std_id;
/* Get the information about the standard */
if (vpif_update_std_info(ch)) {
ret = -EINVAL;
vpif_err("Error getting the standard info\n");
goto s_std_exit;
}
/* Configure the default format information */
vpif_config_format(ch);
/* set standard in the sub device */
ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], core,
s_std, *std_id);
if (ret < 0)
vpif_dbg(1, debug, "Failed to set standard for sub devices\n");
s_std_exit:
mutex_unlock(&common->lock);
return ret;
}
static int vpif_check_format(struct channel_obj *ch,
struct v4l2_pix_format *pixfmt)
{
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
enum v4l2_field field = pixfmt->field;
u32 sizeimage, hpitch, vpitch;
if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P)
goto invalid_fmt_exit;
if (!(VPIF_VALID_FIELD(field)))
goto invalid_fmt_exit;
if (pixfmt->bytesperline <= 0)
goto invalid_pitch_exit;
if (V4L2_MEMORY_USERPTR == common->memory)
sizeimage = pixfmt->sizeimage;
else
sizeimage = config_params.channel_bufsize[ch->channel_id];
if (vpif_get_std_info(ch)) {
vpif_err("Error getting the standard info\n");
return -EINVAL;
}
hpitch = pixfmt->bytesperline;
vpitch = sizeimage / (hpitch * 2);
/* Check for valid value of pitch */
if ((hpitch < ch->vpifparams.std_info.width) ||
(vpitch < ch->vpifparams.std_info.height))
goto invalid_pitch_exit;
/* Check for 8 byte alignment */
if (!ISALIGNED(hpitch)) {
vpif_err("invalid pitch alignment\n");
return -EINVAL;
}
pixfmt->width = common->fmt.fmt.pix.width;
pixfmt->height = common->fmt.fmt.pix.height;
return 0;
invalid_fmt_exit:
vpif_err("invalid field format\n");
return -EINVAL;
invalid_pitch_exit:
vpif_err("invalid pitch\n");
return -EINVAL;
}
static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
int ret = 0;
vpif_dbg(2, debug, "vpif_s_std\n");
if (common->started) {
vpif_err("streaming in progress\n");
return -EBUSY;
}
if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
(VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
if (!fh->initialized) {
vpif_dbg(1, debug, "Channel Busy\n");
return -EBUSY;
}
}
ret = v4l2_prio_check(&ch->prio, fh->prio);
if (0 != ret)
return ret;
fh->initialized = 1;
ch->video.stdid = *std_id;
ch->video.dv_preset = V4L2_DV_INVALID;
memset(&ch->video.bt_timings, 0, sizeof(ch->video.bt_timings));
if (vpif_update_std_info(ch)) {
vpif_err("Error getting the standard info\n");
return -EINVAL;
}
vpif_config_format(ch);
ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], core,
s_std, *std_id);
if (ret < 0)
vpif_dbg(1, debug, "Failed to set standard for sub devices\n");
return ret;
}
static int vpif_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
int ret = 0;
if (!(*std_id & DM646X_V4L2_STD))
return -EINVAL;
if (common->started) {
vpif_err("streaming in progress\n");
return -EBUSY;
}
/* Call encoder subdevice function to set the standard */
ch->video.stdid = *std_id;
ch->video.dv_preset = V4L2_DV_INVALID;
memset(&ch->video.bt_timings, 0, sizeof(ch->video.bt_timings));
/* Get the information about the standard */
if (vpif_update_resolution(ch))
return -EINVAL;
if ((ch->vpifparams.std_info.width *
ch->vpifparams.std_info.height * 2) >
config_params.channel_bufsize[ch->channel_id]) {
vpif_err("invalid std for this size\n");
return -EINVAL;
}
common->fmt.fmt.pix.bytesperline = common->fmt.fmt.pix.width;
/* Configure the default format information */
vpif_config_format(ch);
ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, video,
s_std_output, *std_id);
if (ret < 0) {
vpif_err("Failed to set output standard\n");
return ret;
}
ret = v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 1, core,
s_std, *std_id);
if (ret < 0)
vpif_err("Failed to set standard for sub devices\n");
return ret;
}
static int vpif_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *reqbuf)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct common_obj *common;
enum v4l2_field field;
u8 index = 0;
/* This file handle has not initialized the channel,
It is not allowed to do settings */
if ((VPIF_CHANNEL2_VIDEO == ch->channel_id)
|| (VPIF_CHANNEL3_VIDEO == ch->channel_id)) {
if (!fh->initialized) {
vpif_err("Channel Busy\n");
return -EBUSY;
}
}
if (V4L2_BUF_TYPE_VIDEO_OUTPUT != reqbuf->type)
return -EINVAL;
index = VPIF_VIDEO_INDEX;
common = &ch->common[index];
if (common->fmt.type != reqbuf->type)
return -EINVAL;
if (0 != common->io_usrs)
return -EBUSY;
if (reqbuf->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
if (common->fmt.fmt.pix.field == V4L2_FIELD_ANY)
field = V4L2_FIELD_INTERLACED;
else
field = common->fmt.fmt.pix.field;
} else {
field = V4L2_VBI_INTERLACED;
}
/* Initialize videobuf queue as per the buffer type */
videobuf_queue_dma_contig_init(&common->buffer_queue,
&video_qops, NULL,
&common->irqlock,
reqbuf->type, field,
sizeof(struct videobuf_buffer), fh,
&common->lock);
/* Set io allowed member of file handle to TRUE */
fh->io_allowed[index] = 1;
/* Increment io usrs member of channel object to 1 */
common->io_usrs = 1;
/* Store type of memory requested in channel object */
common->memory = reqbuf->memory;
INIT_LIST_HEAD(&common->dma_queue);
/* Allocate buffers */
return videobuf_reqbufs(&common->buffer_queue, reqbuf);
}
/*
* vpif_uservirt_to_phys: This function is used to convert user
* space virtual address to physical address.
*/
static u32 vpif_uservirt_to_phys(u32 virtp)
{
struct mm_struct *mm = current->mm;
unsigned long physp = 0;
struct vm_area_struct *vma;
vma = find_vma(mm, virtp);
/* For kernel direct-mapped memory, take the easy way */
if (virtp >= PAGE_OFFSET) {
physp = virt_to_phys((void *)virtp);
} else if (vma && (vma->vm_flags & VM_IO) && (vma->vm_pgoff)) {
/* this will catch, kernel-allocated, mmaped-to-usermode addr */
physp = (vma->vm_pgoff << PAGE_SHIFT) + (virtp - vma->vm_start);
} else {
/* otherwise, use get_user_pages() for general userland pages */
int res, nr_pages = 1;
struct page *pages;
down_read(¤t->mm->mmap_sem);
res = get_user_pages(current, current->mm,
virtp, nr_pages, 1, 0, &pages, NULL);
up_read(¤t->mm->mmap_sem);
if (res == nr_pages) {
physp = __pa(page_address(&pages[0]) +
(virtp & ~PAGE_MASK));
} else {
vpif_err("get_user_pages failed\n");
return 0;
}
}
return physp;
}
static inline u32 vpif_uservirt_to_phys(u32 virtp)
{
unsigned long physp = 0;
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
vma = find_vma(mm, virtp);
if (virtp >= PAGE_OFFSET)
physp = virt_to_phys((void *)virtp);
else if (vma && (vma->vm_flags & VM_IO) && (vma->vm_pgoff))
physp = (vma->vm_pgoff << PAGE_SHIFT) + (virtp - vma->vm_start);
else {
int res, nr_pages = 1;
struct page *pages;
down_read(¤t->mm->mmap_sem);
res = get_user_pages(current, current->mm,
virtp, nr_pages, 1, 0, &pages, NULL);
up_read(¤t->mm->mmap_sem);
if (res == nr_pages)
physp = __pa(page_address(&pages[0]) +
(virtp & ~PAGE_MASK));
else {
vpif_err("get_user_pages failed\n");
return 0;
}
}
return physp;
}
/*
* vpif_open: It creates object of file handle structure and stores it in
* private_data member of filepointer
*/
static int vpif_open(struct file *filep)
{
struct video_device *vdev = video_devdata(filep);
struct channel_obj *ch = NULL;
struct vpif_fh *fh = NULL;
ch = video_get_drvdata(vdev);
/* Allocate memory for the file handle object */
fh = kzalloc(sizeof(struct vpif_fh), GFP_KERNEL);
if (fh == NULL) {
vpif_err("unable to allocate memory for file handle object\n");
return -ENOMEM;
}
/* store pointer to fh in private_data member of filep */
filep->private_data = fh;
fh->channel = ch;
fh->initialized = 0;
if (!ch->initialized) {
fh->initialized = 1;
ch->initialized = 1;
memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
}
/* Increment channel usrs counter */
atomic_inc(&ch->usrs);
/* Set io_allowed[VPIF_VIDEO_INDEX] member to false */
fh->io_allowed[VPIF_VIDEO_INDEX] = 0;
/* Initialize priority of this instance to default priority */
fh->prio = V4L2_PRIORITY_UNSET;
v4l2_prio_open(&ch->prio, &fh->prio);
return 0;
}
/*
* buffer_prepare: This is the callback function called from videobuf_qbuf()
* function the buffer is prepared and user space virtual address is converted
* into physical address
*/
static int vpif_buffer_prepare(struct videobuf_queue *q,
struct videobuf_buffer *vb,
enum v4l2_field field)
{
struct vpif_fh *fh = q->priv_data;
struct common_obj *common;
unsigned long addr;
common = &fh->channel->common[VPIF_VIDEO_INDEX];
if (VIDEOBUF_NEEDS_INIT == vb->state) {
vb->width = common->width;
vb->height = common->height;
vb->size = vb->width * vb->height;
vb->field = field;
}
vb->state = VIDEOBUF_PREPARED;
/* if user pointer memory mechanism is used, get the physical
* address of the buffer */
if (V4L2_MEMORY_USERPTR == common->memory) {
if (!vb->baddr) {
vpif_err("buffer_address is 0\n");
return -EINVAL;
}
vb->boff = vpif_uservirt_to_phys(vb->baddr);
if (!ISALIGNED(vb->boff))
goto buf_align_exit;
}
addr = vb->boff;
if (q->streaming && (V4L2_BUF_TYPE_SLICED_VBI_OUTPUT != q->type)) {
if (!ISALIGNED(addr + common->ytop_off) ||
!ISALIGNED(addr + common->ybtm_off) ||
!ISALIGNED(addr + common->ctop_off) ||
!ISALIGNED(addr + common->cbtm_off))
goto buf_align_exit;
}
return 0;
buf_align_exit:
vpif_err("buffer offset not aligned to 8 bytes\n");
return -EINVAL;
}
static int vpif_streamoff(struct file *file, void *priv,
enum v4l2_buf_type buftype)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
vpif_err("buffer type not supported\n");
return -EINVAL;
}
if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
vpif_err("fh->io_allowed\n");
return -EACCES;
}
if (!common->started) {
vpif_err("channel->started\n");
return -EINVAL;
}
if (mutex_lock_interruptible(&common->lock))
return -ERESTARTSYS;
if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
/* disable channel */
if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
enable_channel2(0);
channel2_intr_enable(0);
}
if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
(2 == common->started)) {
enable_channel3(0);
channel3_intr_enable(0);
}
}
common->started = 0;
mutex_unlock(&common->lock);
return videobuf_streamoff(&common->buffer_queue);
}
static int vpif_enum_fmt_vid_out(struct file *file, void *priv,
struct v4l2_fmtdesc *fmt)
{
if (fmt->index != 0) {
vpif_err("Invalid format index\n");
return -EINVAL;
}
/* Fill in the information about format */
fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
return 0;
}
static int vpif_g_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *fmt)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
/* Check the validity of the buffer type */
if (common->fmt.type != fmt->type)
return -EINVAL;
/* Fill in the information about format */
if (mutex_lock_interruptible(&common->lock))
return -ERESTARTSYS;
if (vpif_get_std_info(ch)) {
vpif_err("Error getting the standard info\n");
return -EINVAL;
}
*fmt = common->fmt;
mutex_unlock(&common->lock);
return 0;
}
static __init int vpif_probe(struct platform_device *pdev)
{
struct vpif_subdev_info *subdevdata;
struct vpif_capture_config *config;
int i, j, k, m, q, err;
struct i2c_adapter *i2c_adap;
struct channel_obj *ch;
struct common_obj *common;
struct video_device *vfd;
struct resource *res;
int subdev_count;
vpif_dev = &pdev->dev;
err = initialize_vpif();
if (err) {
v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
return err;
}
k = 0;
while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, k))) {
for (i = res->start; i <= res->end; i++) {
if (request_irq(i, vpif_channel_isr, IRQF_DISABLED,
"DM646x_Capture",
(void *)(&vpif_obj.dev[k]->channel_id))) {
err = -EBUSY;
i--;
goto vpif_int_err;
}
}
k++;
}
for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
/* Get the pointer to the channel object */
ch = vpif_obj.dev[i];
/* Allocate memory for video device */
vfd = video_device_alloc();
if (NULL == vfd) {
for (j = 0; j < i; j++) {
ch = vpif_obj.dev[j];
video_device_release(ch->video_dev);
}
err = -ENOMEM;
goto vpif_dev_alloc_err;
}
/* Initialize field of video device */
*vfd = vpif_video_template;
vfd->v4l2_dev = &vpif_obj.v4l2_dev;
vfd->release = video_device_release;
snprintf(vfd->name, sizeof(vfd->name),
"DM646x_VPIFCapture_DRIVER_V%d.%d.%d",
(VPIF_CAPTURE_VERSION_CODE >> 16) & 0xff,
(VPIF_CAPTURE_VERSION_CODE >> 8) & 0xff,
(VPIF_CAPTURE_VERSION_CODE) & 0xff);
/* Set video_dev to the video device */
ch->video_dev = vfd;
}
for (j = 0; j < VPIF_CAPTURE_MAX_DEVICES; j++) {
ch = vpif_obj.dev[j];
ch->channel_id = j;
common = &(ch->common[VPIF_VIDEO_INDEX]);
spin_lock_init(&common->irqlock);
mutex_init(&common->lock);
/* Initialize prio member of channel object */
v4l2_prio_init(&ch->prio);
err = video_register_device(ch->video_dev,
VFL_TYPE_GRABBER, (j ? 1 : 0));
if (err)
goto probe_out;
video_set_drvdata(ch->video_dev, ch);
}
i2c_adap = i2c_get_adapter(1);
config = pdev->dev.platform_data;
subdev_count = config->subdev_count;
vpif_obj.sd = kmalloc(sizeof(struct v4l2_subdev *) * subdev_count,
GFP_KERNEL);
if (vpif_obj.sd == NULL) {
vpif_err("unable to allocate memory for subdevice pointers\n");
err = -ENOMEM;
goto probe_out;
}
err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
if (err) {
v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
goto probe_subdev_out;
}
for (i = 0; i < subdev_count; i++) {
subdevdata = &config->subdev_info[i];
vpif_obj.sd[i] =
v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
i2c_adap,
subdevdata->name,
&subdevdata->board_info,
NULL);
if (!vpif_obj.sd[i]) {
vpif_err("Error registering v4l2 subdevice\n");
goto probe_subdev_out;
}
v4l2_info(&vpif_obj.v4l2_dev, "registered sub device %s\n",
subdevdata->name);
if (vpif_obj.sd[i])
vpif_obj.sd[i]->grp_id = 1 << i;
}
v4l2_info(&vpif_obj.v4l2_dev, "DM646x VPIF Capture driver"
" initialized\n");
return 0;
probe_subdev_out:
/* free sub devices memory */
kfree(vpif_obj.sd);
j = VPIF_CAPTURE_MAX_DEVICES;
probe_out:
v4l2_device_unregister(&vpif_obj.v4l2_dev);
for (k = 0; k < j; k++) {
/* Get the pointer to the channel object */
ch = vpif_obj.dev[k];
/* Unregister video device */
video_unregister_device(ch->video_dev);
}
vpif_dev_alloc_err:
k = VPIF_CAPTURE_MAX_DEVICES-1;
res = platform_get_resource(pdev, IORESOURCE_IRQ, k);
i = res->end;
vpif_int_err:
for (q = k; q >= 0; q--) {
for (m = i; m >= (int)res->start; m--)
free_irq(m, (void *)(&vpif_obj.dev[q]->channel_id));
res = platform_get_resource(pdev, IORESOURCE_IRQ, q-1);
if (res)
i = res->end;
}
return err;
}
static int vpif_s_input(struct file *file, void *priv, unsigned int index)
{
struct vpif_capture_config *config = vpif_dev->platform_data;
struct vpif_capture_chan_config *chan_cfg;
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct video_obj *vid_ch = &ch->video;
struct vpif_subdev_info *subdev_info;
int ret = 0, sd_index = 0;
u32 input = 0, output = 0;
chan_cfg = &config->chan_config[ch->channel_id];
if (common->started) {
vpif_err("Streaming in progress\n");
return -EBUSY;
}
if ((VPIF_CHANNEL0_VIDEO == ch->channel_id) ||
(VPIF_CHANNEL1_VIDEO == ch->channel_id)) {
if (!fh->initialized) {
vpif_dbg(1, debug, "Channel Busy\n");
return -EBUSY;
}
}
ret = v4l2_prio_check(&ch->prio, fh->prio);
if (0 != ret)
return ret;
fh->initialized = 1;
subdev_info = vpif_map_sub_device_to_input(ch, config, index,
&sd_index);
if (NULL == subdev_info) {
vpif_dbg(1, debug,
"couldn't lookup sub device for the input index\n");
return -EINVAL;
}
if (mutex_lock_interruptible(&common->lock))
return -ERESTARTSYS;
/* first setup input path from sub device to vpif */
if (config->setup_input_path) {
ret = config->setup_input_path(ch->channel_id,
subdev_info->name);
if (ret < 0) {
vpif_dbg(1, debug, "couldn't setup input path for the"
" sub device %s, for input index %d\n",
subdev_info->name, index);
goto exit;
}
}
if (subdev_info->can_route) {
input = subdev_info->input;
output = subdev_info->output;
ret = v4l2_subdev_call(vpif_obj.sd[sd_index], video, s_routing,
input, output, 0);
if (ret < 0) {
vpif_dbg(1, debug, "Failed to set input\n");
goto exit;
}
}
vid_ch->input_idx = index;
ch->curr_subdev_info = subdev_info;
ch->curr_sd_index = sd_index;
/* copy interface parameters to vpif */
ch->vpifparams.iface = subdev_info->vpif_if;
/* update tvnorms from the sub device input info */
ch->video_dev->tvnorms = chan_cfg->inputs[index].input.std;
exit:
mutex_unlock(&common->lock);
return ret;
}
static int vpif_streamon(struct file *file, void *priv,
enum v4l2_buf_type buftype)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct channel_obj *oth_ch = vpif_obj.dev[!ch->channel_id];
struct vpif_params *vpif = &ch->vpifparams;
struct vpif_display_config *vpif_config_data =
vpif_dev->platform_data;
unsigned long addr = 0;
int ret = 0;
if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
vpif_err("buffer type not supported\n");
return -EINVAL;
}
if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
vpif_err("fh->io_allowed\n");
return -EACCES;
}
/* If Streaming is already started, return error */
if (common->started) {
vpif_err("channel->started\n");
return -EBUSY;
}
if ((ch->channel_id == VPIF_CHANNEL2_VIDEO
&& oth_ch->common[VPIF_VIDEO_INDEX].started &&
ch->vpifparams.std_info.ycmux_mode == 0)
|| ((ch->channel_id == VPIF_CHANNEL3_VIDEO)
&& (2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) {
vpif_err("other channel is using\n");
return -EBUSY;
}
ret = vpif_check_format(ch, &common->fmt.fmt.pix);
if (ret < 0)
return ret;
/* Call videobuf_streamon to start streaming in videobuf */
ret = videobuf_streamon(&common->buffer_queue);
if (ret < 0) {
vpif_err("videobuf_streamon\n");
return ret;
}
/* If buffer queue is empty, return error */
if (list_empty(&common->dma_queue)) {
vpif_err("buffer queue is empty\n");
return -EIO;
}
/* Get the next frame from the buffer queue */
common->next_frm = common->cur_frm =
list_entry(common->dma_queue.next,
struct videobuf_buffer, queue);
list_del(&common->cur_frm->queue);
/* Mark state of the current frame to active */
common->cur_frm->state = VIDEOBUF_ACTIVE;
/* Initialize field_id and started member */
ch->field_id = 0;
common->started = 1;
if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
addr = common->cur_frm->boff;
/* Calculate the offset for Y and C data in the buffer */
vpif_calculate_offsets(ch);
if ((ch->vpifparams.std_info.frm_fmt &&
((common->fmt.fmt.pix.field != V4L2_FIELD_NONE)
&& (common->fmt.fmt.pix.field != V4L2_FIELD_ANY)))
|| (!ch->vpifparams.std_info.frm_fmt
&& (common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) {
vpif_err("conflict in field format and std format\n");
return -EINVAL;
}
/* clock settings */
ret =
vpif_config_data->set_clock(ch->vpifparams.std_info.ycmux_mode,
ch->vpifparams.std_info.hd_sd);
if (ret < 0) {
vpif_err("can't set clock\n");
return ret;
}
/* set the parameters and addresses */
ret = vpif_set_video_params(vpif, ch->channel_id + 2);
if (ret < 0)
return ret;
common->started = ret;
vpif_config_addr(ch, ret);
common->set_addr((addr + common->ytop_off),
(addr + common->ybtm_off),
(addr + common->ctop_off),
(addr + common->cbtm_off));
/* Set interrupt for both the fields in VPIF
Register enable channel in VPIF register */
if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
channel2_intr_assert();
channel2_intr_enable(1);
enable_channel2(1);
}
if ((VPIF_CHANNEL3_VIDEO == ch->channel_id)
|| (common->started == 2)) {
channel3_intr_assert();
channel3_intr_enable(1);
enable_channel3(1);
}
channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
}
return ret;
}
/**
* vpif_open : vpif open handler
* @filep: file ptr
*
* It creates object of file handle structure and stores it in private_data
* member of filepointer
*/
static int vpif_open(struct file *filep)
{
struct vpif_capture_config *config = vpif_dev->platform_data;
struct video_device *vdev = video_devdata(filep);
struct common_obj *common;
struct video_obj *vid_ch;
struct channel_obj *ch;
struct vpif_fh *fh;
int i, ret = 0;
vpif_dbg(2, debug, "vpif_open\n");
ch = video_get_drvdata(vdev);
vid_ch = &ch->video;
common = &ch->common[VPIF_VIDEO_INDEX];
if (mutex_lock_interruptible(&common->lock))
return -ERESTARTSYS;
if (NULL == ch->curr_subdev_info) {
/**
* search through the sub device to see a registered
* sub device and make it as current sub device
*/
for (i = 0; i < config->subdev_count; i++) {
if (vpif_obj.sd[i]) {
/* the sub device is registered */
ch->curr_subdev_info = &config->subdev_info[i];
/* make first input as the current input */
vid_ch->input_idx = 0;
break;
}
}
if (i == config->subdev_count) {
vpif_err("No sub device registered\n");
ret = -ENOENT;
goto exit;
}
}
/* Allocate memory for the file handle object */
fh = kmalloc(sizeof(struct vpif_fh), GFP_KERNEL);
if (NULL == fh) {
vpif_err("unable to allocate memory for file handle object\n");
ret = -ENOMEM;
goto exit;
}
/* store pointer to fh in private_data member of filep */
filep->private_data = fh;
fh->channel = ch;
fh->initialized = 0;
/* If decoder is not initialized. initialize it */
if (!ch->initialized) {
fh->initialized = 1;
ch->initialized = 1;
memset(&(ch->vpifparams), 0, sizeof(struct vpif_params));
}
/* Increment channel usrs counter */
ch->usrs++;
/* Set io_allowed member to false */
fh->io_allowed[VPIF_VIDEO_INDEX] = 0;
/* Initialize priority of this instance to default priority */
fh->prio = V4L2_PRIORITY_UNSET;
v4l2_prio_open(&ch->prio, &fh->prio);
exit:
mutex_unlock(&common->lock);
return ret;
}
/**
* vpif_qbuf() - query buffer handler
* @file: file ptr
* @priv: file handle
* @buf: v4l2 buffer structure ptr
*/
static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct v4l2_buffer tbuf = *buf;
struct videobuf_buffer *buf1;
unsigned long addr = 0;
unsigned long flags;
int ret = 0;
vpif_dbg(2, debug, "vpif_qbuf\n");
if (common->fmt.type != tbuf.type) {
vpif_err("invalid buffer type\n");
return -EINVAL;
}
if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
vpif_err("fh io not allowed \n");
return -EACCES;
}
if (!(list_empty(&common->dma_queue)) ||
(common->cur_frm != common->next_frm) ||
!common->started ||
(common->started && (0 == ch->field_id)))
return videobuf_qbuf(&common->buffer_queue, buf);
/* bufferqueue is empty store buffer address in VPIF registers */
mutex_lock(&common->buffer_queue.vb_lock);
buf1 = common->buffer_queue.bufs[tbuf.index];
if ((buf1->state == VIDEOBUF_QUEUED) ||
(buf1->state == VIDEOBUF_ACTIVE)) {
vpif_err("invalid state\n");
goto qbuf_exit;
}
switch (buf1->memory) {
case V4L2_MEMORY_MMAP:
if (buf1->baddr == 0)
goto qbuf_exit;
break;
case V4L2_MEMORY_USERPTR:
if (tbuf.length < buf1->bsize)
goto qbuf_exit;
if ((VIDEOBUF_NEEDS_INIT != buf1->state)
&& (buf1->baddr != tbuf.m.userptr))
vpif_buffer_release(&common->buffer_queue, buf1);
buf1->baddr = tbuf.m.userptr;
break;
default:
goto qbuf_exit;
}
local_irq_save(flags);
ret = vpif_buffer_prepare(&common->buffer_queue, buf1,
common->buffer_queue.field);
if (ret < 0) {
local_irq_restore(flags);
goto qbuf_exit;
}
buf1->state = VIDEOBUF_ACTIVE;
if (V4L2_MEMORY_USERPTR == common->memory)
addr = buf1->boff;
else
addr = videobuf_to_dma_contig(buf1);
common->next_frm = buf1;
common->set_addr(addr + common->ytop_off,
addr + common->ybtm_off,
addr + common->ctop_off,
addr + common->cbtm_off);
local_irq_restore(flags);
list_add_tail(&buf1->stream, &common->buffer_queue.stream);
mutex_unlock(&common->buffer_queue.vb_lock);
return 0;
qbuf_exit:
mutex_unlock(&common->buffer_queue.vb_lock);
return -EINVAL;
}
/*
* vpif_probe: This function creates device entries by register itself to the
* V4L2 driver and initializes fields of each channel objects
*/
static __init int vpif_probe(struct platform_device *pdev)
{
struct vpif_subdev_info *subdevdata;
struct vpif_display_config *config;
int i, j = 0, k, q, m, err = 0;
struct i2c_adapter *i2c_adap;
struct common_obj *common;
struct channel_obj *ch;
struct video_device *vfd;
struct resource *res;
int subdev_count;
vpif_dev = &pdev->dev;
err = initialize_vpif();
if (err) {
v4l2_err(vpif_dev->driver, "Error initializing vpif\n");
return err;
}
err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
if (err) {
v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
return err;
}
k = 0;
while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, k))) {
for (i = res->start; i <= res->end; i++) {
if (request_irq(i, vpif_channel_isr, IRQF_DISABLED,
"DM646x_Display",
(void *)(&vpif_obj.dev[k]->channel_id))) {
err = -EBUSY;
goto vpif_int_err;
}
}
k++;
}
for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
/* Get the pointer to the channel object */
ch = vpif_obj.dev[i];
/* Allocate memory for video device */
vfd = video_device_alloc();
if (vfd == NULL) {
for (j = 0; j < i; j++) {
ch = vpif_obj.dev[j];
video_device_release(ch->video_dev);
}
err = -ENOMEM;
goto vpif_int_err;
}
/* Initialize field of video device */
*vfd = vpif_video_template;
vfd->v4l2_dev = &vpif_obj.v4l2_dev;
vfd->release = video_device_release;
snprintf(vfd->name, sizeof(vfd->name),
"DM646x_VPIFDisplay_DRIVER_V%d.%d.%d",
(VPIF_DISPLAY_VERSION_CODE >> 16) & 0xff,
(VPIF_DISPLAY_VERSION_CODE >> 8) & 0xff,
(VPIF_DISPLAY_VERSION_CODE) & 0xff);
/* Set video_dev to the video device */
ch->video_dev = vfd;
}
for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
ch = vpif_obj.dev[j];
/* Initialize field of the channel objects */
atomic_set(&ch->usrs, 0);
for (k = 0; k < VPIF_NUMOBJECTS; k++) {
ch->common[k].numbuffers = 0;
common = &ch->common[k];
common->io_usrs = 0;
common->started = 0;
spin_lock_init(&common->irqlock);
mutex_init(&common->lock);
common->numbuffers = 0;
common->set_addr = NULL;
common->ytop_off = common->ybtm_off = 0;
common->ctop_off = common->cbtm_off = 0;
common->cur_frm = common->next_frm = NULL;
memset(&common->fmt, 0, sizeof(common->fmt));
common->numbuffers = config_params.numbuffers[k];
}
ch->initialized = 0;
ch->channel_id = j;
if (j < 2)
ch->common[VPIF_VIDEO_INDEX].numbuffers =
config_params.numbuffers[ch->channel_id];
else
ch->common[VPIF_VIDEO_INDEX].numbuffers = 0;
memset(&ch->vpifparams, 0, sizeof(ch->vpifparams));
/* Initialize prio member of channel object */
v4l2_prio_init(&ch->prio);
ch->common[VPIF_VIDEO_INDEX].fmt.type =
V4L2_BUF_TYPE_VIDEO_OUTPUT;
ch->video_dev->lock = &common->lock;
/* register video device */
vpif_dbg(1, debug, "channel=%x,channel->video_dev=%x\n",
(int)ch, (int)&ch->video_dev);
err = video_register_device(ch->video_dev,
VFL_TYPE_GRABBER, (j ? 3 : 2));
if (err < 0)
goto probe_out;
video_set_drvdata(ch->video_dev, ch);
}
i2c_adap = i2c_get_adapter(1);
config = pdev->dev.platform_data;
subdev_count = config->subdev_count;
subdevdata = config->subdevinfo;
vpif_obj.sd = kzalloc(sizeof(struct v4l2_subdev *) * subdev_count,
GFP_KERNEL);
if (vpif_obj.sd == NULL) {
vpif_err("unable to allocate memory for subdevice pointers\n");
err = -ENOMEM;
goto probe_out;
}
for (i = 0; i < subdev_count; i++) {
vpif_obj.sd[i] = v4l2_i2c_new_subdev_board(&vpif_obj.v4l2_dev,
i2c_adap,
&subdevdata[i].board_info,
NULL);
if (!vpif_obj.sd[i]) {
vpif_err("Error registering v4l2 subdevice\n");
goto probe_subdev_out;
}
if (vpif_obj.sd[i])
vpif_obj.sd[i]->grp_id = 1 << i;
}
v4l2_info(&vpif_obj.v4l2_dev,
"DM646x VPIF display driver initialized\n");
return 0;
probe_subdev_out:
kfree(vpif_obj.sd);
probe_out:
for (k = 0; k < j; k++) {
ch = vpif_obj.dev[k];
video_unregister_device(ch->video_dev);
video_device_release(ch->video_dev);
ch->video_dev = NULL;
}
vpif_int_err:
v4l2_device_unregister(&vpif_obj.v4l2_dev);
vpif_err("VPIF IRQ request failed\n");
for (q = k; k >= 0; k--) {
for (m = i; m >= res->start; m--)
free_irq(m, (void *)(&vpif_obj.dev[k]->channel_id));
res = platform_get_resource(pdev, IORESOURCE_IRQ, k-1);
m = res->end;
}
return err;
}