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WSL2-Linux-Kernel/drivers/media/video/davinci/vpif_capture.c

2170 строки
55 KiB
C
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/*
* Copyright (C) 2009 Texas Instruments Inc
*
* 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
*
* TODO : add support for VBI & HBI data service
* add static buffer allocation
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/string.h>
#include <linux/videodev2.h>
#include <linux/wait.h>
#include <linux/time.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/version.h>
#include <linux/slab.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include "vpif_capture.h"
#include "vpif.h"
MODULE_DESCRIPTION("TI DaVinci VPIF Capture driver");
MODULE_LICENSE("GPL");
#define vpif_err(fmt, arg...) v4l2_err(&vpif_obj.v4l2_dev, fmt, ## arg)
#define vpif_dbg(level, debug, fmt, arg...) \
v4l2_dbg(level, debug, &vpif_obj.v4l2_dev, fmt, ## arg)
static int debug = 1;
static u32 ch0_numbuffers = 3;
static u32 ch1_numbuffers = 3;
static u32 ch0_bufsize = 1920 * 1080 * 2;
static u32 ch1_bufsize = 720 * 576 * 2;
module_param(debug, int, 0644);
module_param(ch0_numbuffers, uint, S_IRUGO);
module_param(ch1_numbuffers, uint, S_IRUGO);
module_param(ch0_bufsize, uint, S_IRUGO);
module_param(ch1_bufsize, uint, S_IRUGO);
MODULE_PARM_DESC(debug, "Debug level 0-1");
MODULE_PARM_DESC(ch2_numbuffers, "Channel0 buffer count (default:3)");
MODULE_PARM_DESC(ch3_numbuffers, "Channel1 buffer count (default:3)");
MODULE_PARM_DESC(ch2_bufsize, "Channel0 buffer size (default:1920 x 1080 x 2)");
MODULE_PARM_DESC(ch3_bufsize, "Channel1 buffer size (default:720 x 576 x 2)");
static struct vpif_config_params config_params = {
.min_numbuffers = 3,
.numbuffers[0] = 3,
.numbuffers[1] = 3,
.min_bufsize[0] = 720 * 480 * 2,
.min_bufsize[1] = 720 * 480 * 2,
.channel_bufsize[0] = 1920 * 1080 * 2,
.channel_bufsize[1] = 720 * 576 * 2,
};
/* global variables */
static struct vpif_device vpif_obj = { {NULL} };
static struct device *vpif_dev;
/**
* ch_params: video standard configuration parameters for vpif
*/
static const struct vpif_channel_config_params ch_params[] = {
{
"NTSC_M", 720, 480, 30, 0, 1, 268, 1440, 1, 23, 263, 266,
286, 525, 525, 0, 1, 0, V4L2_STD_525_60,
},
{
"PAL_BDGHIK", 720, 576, 25, 0, 1, 280, 1440, 1, 23, 311, 313,
336, 624, 625, 0, 1, 0, V4L2_STD_625_50,
},
};
/**
* vpif_uservirt_to_phys : translate user/virtual address to phy address
* @virtp: user/virtual address
*
* This inline function is used to convert user space virtual address to
* physical address.
*/
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);
/* 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
* addresses
*/
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(&current->mm->mmap_sem);
res = get_user_pages(current, current->mm,
virtp, nr_pages, 1, 0, &pages, NULL);
up_read(&current->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;
}
/**
* buffer_prepare : callback function for buffer prepare
* @q : buffer queue ptr
* @vb: ptr to video buffer
* @field: field info
*
* This is the callback function for buffer prepare when videobuf_qbuf()
* function is called. The buffer is prepared and user space virtual address
* or user address is converted into physical address
*/
static int vpif_buffer_prepare(struct videobuf_queue *q,
struct videobuf_buffer *vb,
enum v4l2_field field)
{
/* Get the file handle object and channel object */
struct vpif_fh *fh = q->priv_data;
struct channel_obj *ch = fh->channel;
struct common_obj *common;
unsigned long addr;
vpif_dbg(2, debug, "vpif_buffer_prepare\n");
common = &ch->common[VPIF_VIDEO_INDEX];
/* If buffer is not initialized, initialize it */
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 (0 == vb->baddr) {
vpif_dbg(1, debug, "buffer address is 0\n");
return -EINVAL;
}
vb->boff = vpif_uservirt_to_phys(vb->baddr);
if (!IS_ALIGNED(vb->boff, 8))
goto exit;
}
addr = vb->boff;
if (q->streaming) {
if (!IS_ALIGNED((addr + common->ytop_off), 8) ||
!IS_ALIGNED((addr + common->ybtm_off), 8) ||
!IS_ALIGNED((addr + common->ctop_off), 8) ||
!IS_ALIGNED((addr + common->cbtm_off), 8))
goto exit;
}
return 0;
exit:
vpif_dbg(1, debug, "buffer_prepare:offset is not aligned to 8 bytes\n");
return -EINVAL;
}
/**
* vpif_buffer_setup : Callback function for buffer setup.
* @q: buffer queue ptr
* @count: number of buffers
* @size: size of the buffer
*
* This callback function is called when reqbuf() is called to adjust
* the buffer count and buffer size
*/
static int vpif_buffer_setup(struct videobuf_queue *q, unsigned int *count,
unsigned int *size)
{
/* Get the file handle object and channel object */
struct vpif_fh *fh = q->priv_data;
struct channel_obj *ch = fh->channel;
struct common_obj *common;
common = &ch->common[VPIF_VIDEO_INDEX];
vpif_dbg(2, debug, "vpif_buffer_setup\n");
/* If memory type is not mmap, return */
if (V4L2_MEMORY_MMAP != common->memory)
return 0;
/* Calculate the size of the buffer */
*size = config_params.channel_bufsize[ch->channel_id];
if (*count < config_params.min_numbuffers)
*count = config_params.min_numbuffers;
return 0;
}
/**
* vpif_buffer_queue : Callback function to add buffer to DMA queue
* @q: ptr to videobuf_queue
* @vb: ptr to videobuf_buffer
*/
static void vpif_buffer_queue(struct videobuf_queue *q,
struct videobuf_buffer *vb)
{
/* Get the file handle object and channel object */
struct vpif_fh *fh = q->priv_data;
struct channel_obj *ch = fh->channel;
struct common_obj *common;
common = &ch->common[VPIF_VIDEO_INDEX];
vpif_dbg(2, debug, "vpif_buffer_queue\n");
/* add the buffer to the DMA queue */
list_add_tail(&vb->queue, &common->dma_queue);
/* Change state of the buffer */
vb->state = VIDEOBUF_QUEUED;
}
/**
* vpif_buffer_release : Callback function to free buffer
* @q: buffer queue ptr
* @vb: ptr to video buffer
*
* This function is called from the videobuf layer to free memory
* allocated to the buffers
*/
static void vpif_buffer_release(struct videobuf_queue *q,
struct videobuf_buffer *vb)
{
/* Get the file handle object and channel object */
struct vpif_fh *fh = q->priv_data;
struct channel_obj *ch = fh->channel;
struct common_obj *common;
common = &ch->common[VPIF_VIDEO_INDEX];
videobuf_dma_contig_free(q, vb);
vb->state = VIDEOBUF_NEEDS_INIT;
}
static struct videobuf_queue_ops video_qops = {
.buf_setup = vpif_buffer_setup,
.buf_prepare = vpif_buffer_prepare,
.buf_queue = vpif_buffer_queue,
.buf_release = vpif_buffer_release,
};
static u8 channel_first_int[VPIF_NUMBER_OF_OBJECTS][2] =
{ {1, 1} };
/**
* vpif_process_buffer_complete: process a completed buffer
* @common: ptr to common channel object
*
* This function time stamp the buffer and mark it as DONE. It also
* wake up any process waiting on the QUEUE and set the next buffer
* as current
*/
static void vpif_process_buffer_complete(struct common_obj *common)
{
do_gettimeofday(&common->cur_frm->ts);
common->cur_frm->state = VIDEOBUF_DONE;
wake_up_interruptible(&common->cur_frm->done);
/* Make curFrm pointing to nextFrm */
common->cur_frm = common->next_frm;
}
/**
* vpif_schedule_next_buffer: set next buffer address for capture
* @common : ptr to common channel object
*
* This function will get next buffer from the dma queue and
* set the buffer address in the vpif register for capture.
* the buffer is marked active
*/
static void vpif_schedule_next_buffer(struct common_obj *common)
{
unsigned long addr = 0;
common->next_frm = list_entry(common->dma_queue.next,
struct videobuf_buffer, queue);
/* Remove that buffer from the buffer queue */
list_del(&common->next_frm->queue);
common->next_frm->state = VIDEOBUF_ACTIVE;
if (V4L2_MEMORY_USERPTR == common->memory)
addr = common->next_frm->boff;
else
addr = videobuf_to_dma_contig(common->next_frm);
/* Set top and bottom field addresses in VPIF registers */
common->set_addr(addr + common->ytop_off,
addr + common->ybtm_off,
addr + common->ctop_off,
addr + common->cbtm_off);
}
/**
* vpif_channel_isr : ISR handler for vpif capture
* @irq: irq number
* @dev_id: dev_id ptr
*
* It changes status of the captured buffer, takes next buffer from the queue
* and sets its address in VPIF registers
*/
static irqreturn_t vpif_channel_isr(int irq, void *dev_id)
{
struct vpif_device *dev = &vpif_obj;
struct common_obj *common;
struct channel_obj *ch;
enum v4l2_field field;
int channel_id = 0;
int fid = -1, i;
channel_id = *(int *)(dev_id);
ch = dev->dev[channel_id];
field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
for (i = 0; i < VPIF_NUMBER_OF_OBJECTS; i++) {
common = &ch->common[i];
/* skip If streaming is not started in this channel */
if (0 == common->started)
continue;
/* Check the field format */
if (1 == ch->vpifparams.std_info.frm_fmt) {
/* Progressive mode */
if (list_empty(&common->dma_queue))
continue;
if (!channel_first_int[i][channel_id])
vpif_process_buffer_complete(common);
channel_first_int[i][channel_id] = 0;
vpif_schedule_next_buffer(common);
channel_first_int[i][channel_id] = 0;
} else {
/**
* Interlaced mode. If it is first interrupt, ignore
* it
*/
if (channel_first_int[i][channel_id]) {
channel_first_int[i][channel_id] = 0;
continue;
}
if (0 == i) {
ch->field_id ^= 1;
/* Get field id from VPIF registers */
fid = vpif_channel_getfid(ch->channel_id);
if (fid != ch->field_id) {
/**
* If field id does not match stored
* field id, make them in sync
*/
if (0 == fid)
ch->field_id = fid;
return IRQ_HANDLED;
}
}
/* device field id and local field id are in sync */
if (0 == fid) {
/* this is even field */
if (common->cur_frm == common->next_frm)
continue;
/* mark the current buffer as done */
vpif_process_buffer_complete(common);
} else if (1 == fid) {
/* odd field */
if (list_empty(&common->dma_queue) ||
(common->cur_frm != common->next_frm))
continue;
vpif_schedule_next_buffer(common);
}
}
}
return IRQ_HANDLED;
}
/**
* vpif_update_std_info() - update standard related info
* @ch: ptr to channel object
*
* For a given standard selected by application, update values
* in the device data structures
*/
static int vpif_update_std_info(struct channel_obj *ch)
{
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct vpif_params *vpifparams = &ch->vpifparams;
const struct vpif_channel_config_params *config;
struct vpif_channel_config_params *std_info;
struct video_obj *vid_ch = &ch->video;
int index;
vpif_dbg(2, debug, "vpif_update_std_info\n");
std_info = &vpifparams->std_info;
for (index = 0; index < ARRAY_SIZE(ch_params); index++) {
config = &ch_params[index];
if (config->stdid & vid_ch->stdid) {
memcpy(std_info, config, sizeof(*config));
break;
}
}
/* standard not found */
if (index == ARRAY_SIZE(ch_params))
return -EINVAL;
common->fmt.fmt.pix.width = std_info->width;
common->width = std_info->width;
common->fmt.fmt.pix.height = std_info->height;
common->height = std_info->height;
common->fmt.fmt.pix.bytesperline = std_info->width;
vpifparams->video_params.hpitch = std_info->width;
vpifparams->video_params.storage_mode = std_info->frm_fmt;
return 0;
}
/**
* vpif_calculate_offsets : This function calculates buffers offsets
* @ch : ptr to channel object
*
* This function calculates buffer offsets for Y and C in the top and
* bottom field
*/
static void vpif_calculate_offsets(struct channel_obj *ch)
{
unsigned int hpitch, vpitch, sizeimage;
struct video_obj *vid_ch = &(ch->video);
struct vpif_params *vpifparams = &ch->vpifparams;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
enum v4l2_field field = common->fmt.fmt.pix.field;
vpif_dbg(2, debug, "vpif_calculate_offsets\n");
if (V4L2_FIELD_ANY == field) {
if (vpifparams->std_info.frm_fmt)
vid_ch->buf_field = V4L2_FIELD_NONE;
else
vid_ch->buf_field = V4L2_FIELD_INTERLACED;
} else
vid_ch->buf_field = common->fmt.fmt.pix.field;
if (V4L2_MEMORY_USERPTR == common->memory)
sizeimage = common->fmt.fmt.pix.sizeimage;
else
sizeimage = config_params.channel_bufsize[ch->channel_id];
hpitch = common->fmt.fmt.pix.bytesperline;
vpitch = sizeimage / (hpitch * 2);
if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
(V4L2_FIELD_INTERLACED == vid_ch->buf_field)) {
/* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
common->ytop_off = 0;
common->ybtm_off = hpitch;
common->ctop_off = sizeimage / 2;
common->cbtm_off = sizeimage / 2 + hpitch;
} else if (V4L2_FIELD_SEQ_TB == vid_ch->buf_field) {
/* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
common->ytop_off = 0;
common->ybtm_off = sizeimage / 4;
common->ctop_off = sizeimage / 2;
common->cbtm_off = common->ctop_off + sizeimage / 4;
} else if (V4L2_FIELD_SEQ_BT == vid_ch->buf_field) {
/* Calculate offsets for Y top, Y Bottom, C top and C Bottom */
common->ybtm_off = 0;
common->ytop_off = sizeimage / 4;
common->cbtm_off = sizeimage / 2;
common->ctop_off = common->cbtm_off + sizeimage / 4;
}
if ((V4L2_FIELD_NONE == vid_ch->buf_field) ||
(V4L2_FIELD_INTERLACED == vid_ch->buf_field))
vpifparams->video_params.storage_mode = 1;
else
vpifparams->video_params.storage_mode = 0;
if (1 == vpifparams->std_info.frm_fmt)
vpifparams->video_params.hpitch =
common->fmt.fmt.pix.bytesperline;
else {
if ((field == V4L2_FIELD_ANY)
|| (field == V4L2_FIELD_INTERLACED))
vpifparams->video_params.hpitch =
common->fmt.fmt.pix.bytesperline * 2;
else
vpifparams->video_params.hpitch =
common->fmt.fmt.pix.bytesperline;
}
ch->vpifparams.video_params.stdid = vpifparams->std_info.stdid;
}
/**
* vpif_config_format: configure default frame format in the device
* ch : ptr to channel object
*/
static void vpif_config_format(struct channel_obj *ch)
{
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
vpif_dbg(2, debug, "vpif_config_format\n");
common->fmt.fmt.pix.field = V4L2_FIELD_ANY;
if (config_params.numbuffers[ch->channel_id] == 0)
common->memory = V4L2_MEMORY_USERPTR;
else
common->memory = V4L2_MEMORY_MMAP;
common->fmt.fmt.pix.sizeimage
= config_params.channel_bufsize[ch->channel_id];
if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER)
common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_SBGGR8;
else
common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
common->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
}
/**
* vpif_get_default_field() - Get default field type based on interface
* @vpif_params - ptr to vpif params
*/
static inline enum v4l2_field vpif_get_default_field(
struct vpif_interface *iface)
{
return (iface->if_type == VPIF_IF_RAW_BAYER) ? V4L2_FIELD_NONE :
V4L2_FIELD_INTERLACED;
}
/**
* vpif_check_format() - check given pixel format for compatibility
* @ch - channel ptr
* @pixfmt - Given pixel format
* @update - update the values as per hardware requirement
*
* Check the application pixel format for S_FMT and update the input
* values as per hardware limits for TRY_FMT. The default pixel and
* field format is selected based on interface type.
*/
static int vpif_check_format(struct channel_obj *ch,
struct v4l2_pix_format *pixfmt,
int update)
{
struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
struct vpif_params *vpif_params = &ch->vpifparams;
enum v4l2_field field = pixfmt->field;
u32 sizeimage, hpitch, vpitch;
int ret = -EINVAL;
vpif_dbg(2, debug, "vpif_check_format\n");
/**
* first check for the pixel format. If if_type is Raw bayer,
* only V4L2_PIX_FMT_SBGGR8 format is supported. Otherwise only
* V4L2_PIX_FMT_YUV422P is supported
*/
if (vpif_params->iface.if_type == VPIF_IF_RAW_BAYER) {
if (pixfmt->pixelformat != V4L2_PIX_FMT_SBGGR8) {
if (!update) {
vpif_dbg(2, debug, "invalid pix format\n");
goto exit;
}
pixfmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
}
} else {
if (pixfmt->pixelformat != V4L2_PIX_FMT_YUV422P) {
if (!update) {
vpif_dbg(2, debug, "invalid pixel format\n");
goto exit;
}
pixfmt->pixelformat = V4L2_PIX_FMT_YUV422P;
}
}
if (!(VPIF_VALID_FIELD(field))) {
if (!update) {
vpif_dbg(2, debug, "invalid field format\n");
goto exit;
}
/**
* By default use FIELD_NONE for RAW Bayer capture
* and FIELD_INTERLACED for other interfaces
*/
field = vpif_get_default_field(&vpif_params->iface);
} else if (field == V4L2_FIELD_ANY)
/* unsupported field. Use default */
field = vpif_get_default_field(&vpif_params->iface);
/* validate the hpitch */
hpitch = pixfmt->bytesperline;
if (hpitch < vpif_params->std_info.width) {
if (!update) {
vpif_dbg(2, debug, "invalid hpitch\n");
goto exit;
}
hpitch = vpif_params->std_info.width;
}
if (V4L2_MEMORY_USERPTR == common->memory)
sizeimage = pixfmt->sizeimage;
else
sizeimage = config_params.channel_bufsize[ch->channel_id];
vpitch = sizeimage / (hpitch * 2);
/* validate the vpitch */
if (vpitch < vpif_params->std_info.height) {
if (!update) {
vpif_dbg(2, debug, "Invalid vpitch\n");
goto exit;
}
vpitch = vpif_params->std_info.height;
}
/* Check for 8 byte alignment */
if (!ALIGN(hpitch, 8)) {
if (!update) {
vpif_dbg(2, debug, "invalid pitch alignment\n");
goto exit;
}
/* adjust to next 8 byte boundary */
hpitch = (((hpitch + 7) / 8) * 8);
}
/* if update is set, modify the bytesperline and sizeimage */
if (update) {
pixfmt->bytesperline = hpitch;
pixfmt->sizeimage = hpitch * vpitch * 2;
}
/**
* Image width and height is always based on current standard width and
* height
*/
pixfmt->width = common->fmt.fmt.pix.width;
pixfmt->height = common->fmt.fmt.pix.height;
return 0;
exit:
return ret;
}
/**
* vpif_config_addr() - function to configure buffer address in vpif
* @ch - channel ptr
* @muxmode - channel mux mode
*/
static void vpif_config_addr(struct channel_obj *ch, int muxmode)
{
struct common_obj *common;
vpif_dbg(2, debug, "vpif_config_addr\n");
common = &(ch->common[VPIF_VIDEO_INDEX]);
if (VPIF_CHANNEL1_VIDEO == ch->channel_id)
common->set_addr = ch1_set_videobuf_addr;
else if (2 == muxmode)
common->set_addr = ch0_set_videobuf_addr_yc_nmux;
else
common->set_addr = ch0_set_videobuf_addr;
}
/**
* vpfe_mmap : It is used to map kernel space buffers into user spaces
* @filep: file pointer
* @vma: ptr to vm_area_struct
*/
static int vpif_mmap(struct file *filep, struct vm_area_struct *vma)
{
/* Get the channel object and file handle object */
struct vpif_fh *fh = filep->private_data;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
vpif_dbg(2, debug, "vpif_mmap\n");
return videobuf_mmap_mapper(&common->buffer_queue, vma);
}
/**
* vpif_poll: It is used for select/poll system call
* @filep: file pointer
* @wait: poll table to wait
*/
static unsigned int vpif_poll(struct file *filep, poll_table * wait)
{
int err = 0;
struct vpif_fh *fh = filep->private_data;
struct channel_obj *channel = fh->channel;
struct common_obj *common = &(channel->common[VPIF_VIDEO_INDEX]);
vpif_dbg(2, debug, "vpif_poll\n");
if (common->started)
err = videobuf_poll_stream(filep, &common->buffer_queue, wait);
return 0;
}
/**
* 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_release : function to clean up file close
* @filep: file pointer
*
* This function deletes buffer queue, frees the buffers and the vpfe file
* handle
*/
static int vpif_release(struct file *filep)
{
struct vpif_fh *fh = filep->private_data;
struct channel_obj *ch = fh->channel;
struct common_obj *common;
vpif_dbg(2, debug, "vpif_release\n");
common = &ch->common[VPIF_VIDEO_INDEX];
if (mutex_lock_interruptible(&common->lock))
return -ERESTARTSYS;
/* if this instance is doing IO */
if (fh->io_allowed[VPIF_VIDEO_INDEX]) {
/* Reset io_usrs member of channel object */
common->io_usrs = 0;
/* Disable channel as per its device type and channel id */
if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
enable_channel0(0);
channel0_intr_enable(0);
}
if ((VPIF_CHANNEL1_VIDEO == ch->channel_id) ||
(2 == common->started)) {
enable_channel1(0);
channel1_intr_enable(0);
}
common->started = 0;
/* Free buffers allocated */
videobuf_queue_cancel(&common->buffer_queue);
videobuf_mmap_free(&common->buffer_queue);
}
/* Decrement channel usrs counter */
ch->usrs--;
/* unlock mutex on channel object */
mutex_unlock(&common->lock);
/* Close the priority */
v4l2_prio_close(&ch->prio, fh->prio);
if (fh->initialized)
ch->initialized = 0;
filep->private_data = NULL;
kfree(fh);
return 0;
}
/**
* vpif_reqbufs() - request buffer handler
* @file: file ptr
* @priv: file handle
* @reqbuf: request buffer structure ptr
*/
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;
u8 index = 0;
int ret = 0;
vpif_dbg(2, debug, "vpif_reqbufs\n");
/**
* This file handle has not initialized the channel,
* It is not allowed to do settings
*/
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;
}
}
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != reqbuf->type)
return -EINVAL;
index = VPIF_VIDEO_INDEX;
common = &ch->common[index];
if (mutex_lock_interruptible(&common->lock))
return -ERESTARTSYS;
if (0 != common->io_usrs) {
ret = -EBUSY;
goto reqbuf_exit;
}
/* Initialize videobuf queue as per the buffer type */
videobuf_queue_dma_contig_init(&common->buffer_queue,
&video_qops, NULL,
&common->irqlock,
reqbuf->type,
common->fmt.fmt.pix.field,
sizeof(struct videobuf_buffer), fh);
/* 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 */
ret = videobuf_reqbufs(&common->buffer_queue, reqbuf);
reqbuf_exit:
mutex_unlock(&common->lock);
return ret;
}
/**
* vpif_querybuf() - query buffer handler
* @file: file ptr
* @priv: file handle
* @buf: v4l2 buffer structure ptr
*/
static int vpif_querybuf(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];
vpif_dbg(2, debug, "vpif_querybuf\n");
if (common->fmt.type != buf->type)
return -EINVAL;
if (common->memory != V4L2_MEMORY_MMAP) {
vpif_dbg(1, debug, "Invalid memory\n");
return -EINVAL;
}
return videobuf_querybuf(&common->buffer_queue, buf);
}
/**
* 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_dqbuf() - query buffer handler
* @file: file ptr
* @priv: file handle
* @buf: v4l2 buffer structure ptr
*/
static int vpif_dqbuf(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];
vpif_dbg(2, debug, "vpif_dqbuf\n");
return videobuf_dqbuf(&common->buffer_queue, buf,
file->f_flags & O_NONBLOCK);
}
/**
* vpif_streamon() - streamon handler
* @file: file ptr
* @priv: file handle
* @buftype: v4l2 buffer type
*/
static int vpif_streamon(struct file *file, void *priv,
enum v4l2_buf_type buftype)
{
struct vpif_capture_config *config = vpif_dev->platform_data;
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;
unsigned long addr = 0;
int ret = 0;
vpif_dbg(2, debug, "vpif_streamon\n");
vpif = &ch->vpifparams;
if (buftype != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
vpif_dbg(1, debug, "buffer type not supported\n");
return -EINVAL;
}
/* If file handle is not allowed IO, return error */
if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
vpif_dbg(1, debug, "io not allowed\n");
return -EACCES;
}
/* If Streaming is already started, return error */
if (common->started) {
vpif_dbg(1, debug, "channel->started\n");
return -EBUSY;
}
if ((ch->channel_id == VPIF_CHANNEL0_VIDEO &&
oth_ch->common[VPIF_VIDEO_INDEX].started &&
vpif->std_info.ycmux_mode == 0) ||
((ch->channel_id == VPIF_CHANNEL1_VIDEO) &&
(2 == oth_ch->common[VPIF_VIDEO_INDEX].started))) {
vpif_dbg(1, debug, "other channel is being used\n");
return -EBUSY;
}
ret = vpif_check_format(ch, &common->fmt.fmt.pix, 0);
if (ret)
return ret;
/* Enable streamon on the sub device */
ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], video,
s_stream, 1);
if (ret && (ret != -ENOIOCTLCMD)) {
vpif_dbg(1, debug, "stream on failed in subdev\n");
return ret;
}
/* Call videobuf_streamon to start streaming in videobuf */
ret = videobuf_streamon(&common->buffer_queue);
if (ret) {
vpif_dbg(1, debug, "videobuf_streamon\n");
return ret;
}
if (mutex_lock_interruptible(&common->lock)) {
ret = -ERESTARTSYS;
goto streamoff_exit;
}
/* If buffer queue is empty, return error */
if (list_empty(&common->dma_queue)) {
vpif_dbg(1, debug, "buffer queue is empty\n");
ret = -EIO;
goto exit;
}
/* Get the next frame from the buffer queue */
common->cur_frm = list_entry(common->dma_queue.next,
struct videobuf_buffer, queue);
common->next_frm = common->cur_frm;
/* Remove buffer from the 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 (V4L2_MEMORY_USERPTR == common->memory)
addr = common->cur_frm->boff;
else
addr = videobuf_to_dma_contig(common->cur_frm);
/* Calculate the offset for Y and C data in the buffer */
vpif_calculate_offsets(ch);
if ((vpif->std_info.frm_fmt &&
((common->fmt.fmt.pix.field != V4L2_FIELD_NONE) &&
(common->fmt.fmt.pix.field != V4L2_FIELD_ANY))) ||
(!vpif->std_info.frm_fmt &&
(common->fmt.fmt.pix.field == V4L2_FIELD_NONE))) {
vpif_dbg(1, debug, "conflict in field format and std format\n");
ret = -EINVAL;
goto exit;
}
/* configure 1 or 2 channel mode */
ret = config->setup_input_channel_mode(vpif->std_info.ycmux_mode);
if (ret < 0) {
vpif_dbg(1, debug, "can't set vpif channel mode\n");
goto exit;
}
/* Call vpif_set_params function to set the parameters and addresses */
ret = vpif_set_video_params(vpif, ch->channel_id);
if (ret < 0) {
vpif_dbg(1, debug, "can't set video params\n");
goto exit;
}
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_CHANNEL0_VIDEO == ch->channel_id)) {
channel0_intr_assert();
channel0_intr_enable(1);
enable_channel0(1);
}
if ((VPIF_CHANNEL1_VIDEO == ch->channel_id) ||
(common->started == 2)) {
channel1_intr_assert();
channel1_intr_enable(1);
enable_channel1(1);
}
channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
mutex_unlock(&common->lock);
return ret;
exit:
mutex_unlock(&common->lock);
streamoff_exit:
ret = videobuf_streamoff(&common->buffer_queue);
return ret;
}
/**
* vpif_streamoff() - streamoff handler
* @file: file ptr
* @priv: file handle
* @buftype: v4l2 buffer type
*/
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];
int ret;
vpif_dbg(2, debug, "vpif_streamoff\n");
if (buftype != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
vpif_dbg(1, debug, "buffer type not supported\n");
return -EINVAL;
}
/* If io is allowed for this file handle, return error */
if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
vpif_dbg(1, debug, "io not allowed\n");
return -EACCES;
}
/* If streaming is not started, return error */
if (!common->started) {
vpif_dbg(1, debug, "channel->started\n");
return -EINVAL;
}
if (mutex_lock_interruptible(&common->lock))
return -ERESTARTSYS;
/* disable channel */
if (VPIF_CHANNEL0_VIDEO == ch->channel_id) {
enable_channel0(0);
channel0_intr_enable(0);
} else {
enable_channel1(0);
channel1_intr_enable(0);
}
common->started = 0;
ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], video,
s_stream, 0);
if (ret && (ret != -ENOIOCTLCMD))
vpif_dbg(1, debug, "stream off failed in subdev\n");
mutex_unlock(&common->lock);
return videobuf_streamoff(&common->buffer_queue);
}
/**
* vpif_map_sub_device_to_input() - Maps sub device to input
* @ch - ptr to channel
* @config - ptr to capture configuration
* @input_index - Given input index from application
* @sub_device_index - index into sd table
*
* lookup the sub device information for a given input index.
* we report all the inputs to application. inputs table also
* has sub device name for the each input
*/
static struct vpif_subdev_info *vpif_map_sub_device_to_input(
struct channel_obj *ch,
struct vpif_capture_config *vpif_cfg,
int input_index,
int *sub_device_index)
{
struct vpif_capture_chan_config *chan_cfg;
struct vpif_subdev_info *subdev_info = NULL;
const char *subdev_name = NULL;
int i;
vpif_dbg(2, debug, "vpif_map_sub_device_to_input\n");
chan_cfg = &vpif_cfg->chan_config[ch->channel_id];
/**
* search through the inputs to find the sub device supporting
* the input
*/
for (i = 0; i < chan_cfg->input_count; i++) {
/* For each sub device, loop through input */
if (i == input_index) {
subdev_name = chan_cfg->inputs[i].subdev_name;
break;
}
}
/* if reached maximum. return null */
if (i == chan_cfg->input_count || (NULL == subdev_name))
return subdev_info;
/* loop through the sub device list to get the sub device info */
for (i = 0; i < vpif_cfg->subdev_count; i++) {
subdev_info = &vpif_cfg->subdev_info[i];
if (!strcmp(subdev_info->name, subdev_name))
break;
}
if (i == vpif_cfg->subdev_count)
return subdev_info;
/* check if the sub device is registered */
if (NULL == vpif_obj.sd[i])
return NULL;
*sub_device_index = i;
return subdev_info;
}
/**
* vpif_querystd() - querystd handler
* @file: file ptr
* @priv: file handle
* @std_id: ptr to std id
*
* This function is called to detect standard at the selected input
*/
static int vpif_querystd(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_querystd\n");
if (mutex_lock_interruptible(&common->lock))
return -ERESTARTSYS;
/* Call querystd function of decoder device */
ret = v4l2_subdev_call(vpif_obj.sd[ch->curr_sd_index], video,
querystd, std_id);
if (ret < 0)
vpif_dbg(1, debug, "Failed to set standard for sub devices\n");
mutex_unlock(&common->lock);
return ret;
}
/**
* vpif_g_std() - get STD handler
* @file: file ptr
* @priv: file handle
* @std_id: ptr to std id
*/
static int vpif_g_std(struct file *file, void *priv, v4l2_std_id *std)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
vpif_dbg(2, debug, "vpif_g_std\n");
*std = ch->video.stdid;
return 0;
}
/**
* 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;
}
/**
* vpif_enum_input() - ENUMINPUT handler
* @file: file ptr
* @priv: file handle
* @input: ptr to input structure
*/
static int vpif_enum_input(struct file *file, void *priv,
struct v4l2_input *input)
{
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;
chan_cfg = &config->chan_config[ch->channel_id];
if (input->index >= chan_cfg->input_count) {
vpif_dbg(1, debug, "Invalid input index\n");
return -EINVAL;
}
memcpy(input, &chan_cfg->inputs[input->index].input,
sizeof(*input));
return 0;
}
/**
* vpif_g_input() - Get INPUT handler
* @file: file ptr
* @priv: file handle
* @index: ptr to input index
*/
static int vpif_g_input(struct file *file, void *priv, unsigned int *index)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct video_obj *vid_ch = &ch->video;
*index = vid_ch->input_idx;
return 0;
}
/**
* vpif_s_input() - Set INPUT handler
* @file: file ptr
* @priv: file handle
* @index: input index
*/
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;
}
/**
* vpif_enum_fmt_vid_cap() - ENUM_FMT handler
* @file: file ptr
* @priv: file handle
* @index: input index
*/
static int vpif_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *fmt)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
if (fmt->index != 0) {
vpif_dbg(1, debug, "Invalid format index\n");
return -EINVAL;
}
/* Fill in the information about format */
if (ch->vpifparams.iface.if_type == VPIF_IF_RAW_BAYER) {
fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
strcpy(fmt->description, "Raw Mode -Bayer Pattern GrRBGb");
fmt->pixelformat = V4L2_PIX_FMT_SBGGR8;
} else {
fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
strcpy(fmt->description, "YCbCr4:2:2 YC Planar");
fmt->pixelformat = V4L2_PIX_FMT_YUV422P;
}
return 0;
}
/**
* vpif_try_fmt_vid_cap() - TRY_FMT handler
* @file: file ptr
* @priv: file handle
* @fmt: ptr to v4l2 format structure
*/
static int vpif_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *fmt)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
return vpif_check_format(ch, pixfmt, 1);
}
/**
* vpif_g_fmt_vid_cap() - Set INPUT handler
* @file: file ptr
* @priv: file handle
* @fmt: ptr to v4l2 format structure
*/
static int vpif_g_fmt_vid_cap(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;
*fmt = common->fmt;
mutex_unlock(&common->lock);
return 0;
}
/**
* vpif_s_fmt_vid_cap() - Set FMT handler
* @file: file ptr
* @priv: file handle
* @fmt: ptr to v4l2 format structure
*/
static int vpif_s_fmt_vid_cap(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];
struct v4l2_pix_format *pixfmt;
int ret = 0;
vpif_dbg(2, debug, "VIDIOC_S_FMT\n");
/* If streaming is started, return error */
if (common->started) {
vpif_dbg(1, debug, "Streaming is started\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;
pixfmt = &fmt->fmt.pix;
/* Check for valid field format */
ret = vpif_check_format(ch, pixfmt, 0);
if (ret)
return ret;
/* store the format in the channel object */
if (mutex_lock_interruptible(&common->lock))
return -ERESTARTSYS;
common->fmt = *fmt;
mutex_unlock(&common->lock);
return 0;
}
/**
* vpif_querycap() - QUERYCAP handler
* @file: file ptr
* @priv: file handle
* @cap: ptr to v4l2_capability structure
*/
static int vpif_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct vpif_capture_config *config = vpif_dev->platform_data;
cap->version = VPIF_CAPTURE_VERSION_CODE;
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
strlcpy(cap->driver, "vpif capture", sizeof(cap->driver));
strlcpy(cap->bus_info, "DM646x Platform", sizeof(cap->bus_info));
strlcpy(cap->card, config->card_name, sizeof(cap->card));
return 0;
}
/**
* vpif_g_priority() - get priority handler
* @file: file ptr
* @priv: file handle
* @prio: ptr to v4l2_priority structure
*/
static int vpif_g_priority(struct file *file, void *priv,
enum v4l2_priority *prio)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
*prio = v4l2_prio_max(&ch->prio);
return 0;
}
/**
* vpif_s_priority() - set priority handler
* @file: file ptr
* @priv: file handle
* @prio: ptr to v4l2_priority structure
*/
static int vpif_s_priority(struct file *file, void *priv, enum v4l2_priority p)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
return v4l2_prio_change(&ch->prio, &fh->prio, p);
}
/**
* vpif_cropcap() - cropcap handler
* @file: file ptr
* @priv: file handle
* @crop: ptr to v4l2_cropcap structure
*/
static int vpif_cropcap(struct file *file, void *priv,
struct v4l2_cropcap *crop)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != crop->type)
return -EINVAL;
crop->bounds.left = 0;
crop->bounds.top = 0;
crop->bounds.height = common->height;
crop->bounds.width = common->width;
crop->defrect = crop->bounds;
return 0;
}
/* vpif capture ioctl operations */
static const struct v4l2_ioctl_ops vpif_ioctl_ops = {
.vidioc_querycap = vpif_querycap,
.vidioc_g_priority = vpif_g_priority,
.vidioc_s_priority = vpif_s_priority,
.vidioc_enum_fmt_vid_cap = vpif_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = vpif_g_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = vpif_s_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = vpif_try_fmt_vid_cap,
.vidioc_enum_input = vpif_enum_input,
.vidioc_s_input = vpif_s_input,
.vidioc_g_input = vpif_g_input,
.vidioc_reqbufs = vpif_reqbufs,
.vidioc_querybuf = vpif_querybuf,
.vidioc_querystd = vpif_querystd,
.vidioc_s_std = vpif_s_std,
.vidioc_g_std = vpif_g_std,
.vidioc_qbuf = vpif_qbuf,
.vidioc_dqbuf = vpif_dqbuf,
.vidioc_streamon = vpif_streamon,
.vidioc_streamoff = vpif_streamoff,
.vidioc_cropcap = vpif_cropcap,
};
/* vpif file operations */
static struct v4l2_file_operations vpif_fops = {
.owner = THIS_MODULE,
.open = vpif_open,
.release = vpif_release,
.ioctl = video_ioctl2,
.mmap = vpif_mmap,
.poll = vpif_poll
};
/* vpif video template */
static struct video_device vpif_video_template = {
.name = "vpif",
.fops = &vpif_fops,
.minor = -1,
.ioctl_ops = &vpif_ioctl_ops,
};
/**
* initialize_vpif() - Initialize vpif data structures
*
* Allocate memory for data structures and initialize them
*/
static int initialize_vpif(void)
{
int err = 0, i, j;
int free_channel_objects_index;
/* Default number of buffers should be 3 */
if ((ch0_numbuffers > 0) &&
(ch0_numbuffers < config_params.min_numbuffers))
ch0_numbuffers = config_params.min_numbuffers;
if ((ch1_numbuffers > 0) &&
(ch1_numbuffers < config_params.min_numbuffers))
ch1_numbuffers = config_params.min_numbuffers;
/* Set buffer size to min buffers size if it is invalid */
if (ch0_bufsize < config_params.min_bufsize[VPIF_CHANNEL0_VIDEO])
ch0_bufsize =
config_params.min_bufsize[VPIF_CHANNEL0_VIDEO];
if (ch1_bufsize < config_params.min_bufsize[VPIF_CHANNEL1_VIDEO])
ch1_bufsize =
config_params.min_bufsize[VPIF_CHANNEL1_VIDEO];
config_params.numbuffers[VPIF_CHANNEL0_VIDEO] = ch0_numbuffers;
config_params.numbuffers[VPIF_CHANNEL1_VIDEO] = ch1_numbuffers;
if (ch0_numbuffers) {
config_params.channel_bufsize[VPIF_CHANNEL0_VIDEO]
= ch0_bufsize;
}
if (ch1_numbuffers) {
config_params.channel_bufsize[VPIF_CHANNEL1_VIDEO]
= ch1_bufsize;
}
/* Allocate memory for six channel objects */
for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
vpif_obj.dev[i] =
kzalloc(sizeof(*vpif_obj.dev[i]), GFP_KERNEL);
/* If memory allocation fails, return error */
if (!vpif_obj.dev[i]) {
free_channel_objects_index = i;
err = -ENOMEM;
goto vpif_init_free_channel_objects;
}
}
return 0;
vpif_init_free_channel_objects:
for (j = 0; j < free_channel_objects_index; j++)
kfree(vpif_obj.dev[j]);
return err;
}
/**
* vpif_probe : This function probes the vpif capture driver
* @pdev: platform device pointer
*
* This 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_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;
}
/**
* vpif_remove() - driver remove handler
* @device: ptr to platform device structure
*
* The vidoe device is unregistered
*/
static int vpif_remove(struct platform_device *device)
{
int i;
struct channel_obj *ch;
v4l2_device_unregister(&vpif_obj.v4l2_dev);
/* un-register device */
for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++) {
/* Get the pointer to the channel object */
ch = vpif_obj.dev[i];
/* Unregister video device */
video_unregister_device(ch->video_dev);
}
return 0;
}
/**
* vpif_suspend: vpif device suspend
*
* TODO: Add suspend code here
*/
static int
vpif_suspend(struct device *dev)
{
return -1;
}
/**
* vpif_resume: vpif device suspend
*
* TODO: Add resume code here
*/
static int
vpif_resume(struct device *dev)
{
return -1;
}
static const struct dev_pm_ops vpif_dev_pm_ops = {
.suspend = vpif_suspend,
.resume = vpif_resume,
};
static struct platform_driver vpif_driver = {
.driver = {
.name = "vpif_capture",
.owner = THIS_MODULE,
.pm = &vpif_dev_pm_ops,
},
.probe = vpif_probe,
.remove = vpif_remove,
};
/**
* vpif_init: initialize the vpif driver
*
* This function registers device and driver to the kernel, requests irq
* handler and allocates memory
* for channel objects
*/
static __init int vpif_init(void)
{
return platform_driver_register(&vpif_driver);
}
/**
* vpif_cleanup : This function clean up the vpif capture resources
*
* This will un-registers device and driver to the kernel, frees
* requested irq handler and de-allocates memory allocated for channel
* objects.
*/
static void vpif_cleanup(void)
{
struct platform_device *pdev;
struct resource *res;
int irq_num;
int i = 0;
pdev = container_of(vpif_dev, struct platform_device, dev);
while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, i))) {
for (irq_num = res->start; irq_num <= res->end; irq_num++)
free_irq(irq_num,
(void *)(&vpif_obj.dev[i]->channel_id));
i++;
}
platform_driver_unregister(&vpif_driver);
kfree(vpif_obj.sd);
for (i = 0; i < VPIF_CAPTURE_MAX_DEVICES; i++)
kfree(vpif_obj.dev[i]);
}
/* Function for module initialization and cleanup */
module_init(vpif_init);
module_exit(vpif_cleanup);
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