- 根目录:
- drivers
- media
- platform
- davinci
- vpif_display.c
/*
* vpif-display - VPIF display driver
* Display driver for TI DaVinci VPIF
*
* Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.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 version 2.
*
* This program is distributed .as is. WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#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/slab.h>
#include <asm/irq.h>
#include <asm/page.h>
#include <media/adv7343.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-chip-ident.h>
#include "vpif_display.h"
#include "vpif.h"
MODULE_DESCRIPTION("TI DaVinci VPIF Display driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(VPIF_DISPLAY_VERSION);
#define VPIF_V4L2_STD (V4L2_STD_525_60 | V4L2_STD_625_50)
#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 ch2_numbuffers = 3;
static u32 ch3_numbuffers = 3;
static u32 ch2_bufsize = 1920 * 1080 * 2;
static u32 ch3_bufsize = 720 * 576 * 2;
module_param(debug, int, 0644);
module_param(ch2_numbuffers, uint, S_IRUGO);
module_param(ch3_numbuffers, uint, S_IRUGO);
module_param(ch2_bufsize, uint, S_IRUGO);
module_param(ch3_bufsize, uint, S_IRUGO);
MODULE_PARM_DESC(debug, "Debug level 0-1");
MODULE_PARM_DESC(ch2_numbuffers, "Channel2 buffer count (default:3)");
MODULE_PARM_DESC(ch3_numbuffers, "Channel3 buffer count (default:3)");
MODULE_PARM_DESC(ch2_bufsize, "Channel2 buffer size (default:1920 x 1080 x 2)");
MODULE_PARM_DESC(ch3_bufsize, "Channel3 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,
};
static struct vpif_device vpif_obj = { {NULL} };
static struct device *vpif_dev;
static void vpif_calculate_offsets(struct channel_obj *ch);
static void vpif_config_addr(struct channel_obj *ch, int muxmode);
/*
* buffer_prepare: This is the callback function called from vb2_qbuf()
* function the buffer is prepared and user space virtual address is converted
* into physical address
*/
static int vpif_buffer_prepare(struct vb2_buffer *vb)
{
struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
struct vb2_queue *q = vb->vb2_queue;
struct common_obj *common;
unsigned long addr;
common = &fh->channel->common[VPIF_VIDEO_INDEX];
if (vb->state != VB2_BUF_STATE_ACTIVE &&
vb->state != VB2_BUF_STATE_PREPARED) {
vb2_set_plane_payload(vb, 0, common->fmt.fmt.pix.sizeimage);
if (vb2_plane_vaddr(vb, 0) &&
vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
goto buf_align_exit;
addr = vb2_dma_contig_plane_dma_addr(vb, 0);
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;
}
/*
* vpif_buffer_queue_setup: This function allocates memory for the buffers
*/
static int vpif_buffer_queue_setup(struct vb2_queue *vq,
const struct v4l2_format *fmt,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
struct vpif_fh *fh = vb2_get_drv_priv(vq);
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
unsigned long size;
if (V4L2_MEMORY_MMAP == common->memory) {
size = config_params.channel_bufsize[ch->channel_id];
/*
* Checking if the buffer size exceeds the available buffer
* ycmux_mode = 0 means 1 channel mode HD and
* ycmux_mode = 1 means 2 channels mode SD
*/
if (ch->vpifparams.std_info.ycmux_mode == 0) {
if (config_params.video_limit[ch->channel_id])
while (size * *nbuffers >
(config_params.video_limit[0]
+ config_params.video_limit[1]))
(*nbuffers)--;
} else {
if (config_params.video_limit[ch->channel_id])
while (size * *nbuffers >
config_params.video_limit[ch->channel_id])
(*nbuffers)--;
}
} else {
size = common->fmt.fmt.pix.sizeimage;
}
if (*nbuffers < config_params.min_numbuffers)
*nbuffers = config_params.min_numbuffers;
*nplanes = 1;
sizes[0] = size;
alloc_ctxs[0] = common->alloc_ctx;
return 0;
}
/*
* vpif_buffer_queue: This function adds the buffer to DMA queue
*/
static void vpif_buffer_queue(struct vb2_buffer *vb)
{
struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
struct vpif_disp_buffer *buf = container_of(vb,
struct vpif_disp_buffer, vb);
struct channel_obj *ch = fh->channel;
struct common_obj *common;
unsigned long flags;
common = &ch->common[VPIF_VIDEO_INDEX];
/* add the buffer to the DMA queue */
spin_lock_irqsave(&common->irqlock, flags);
list_add_tail(&buf->list, &common->dma_queue);
spin_unlock_irqrestore(&common->irqlock, flags);
}
/*
* vpif_buf_cleanup: This function is called from the videobuf2 layer to
* free memory allocated to the buffers
*/
static void vpif_buf_cleanup(struct vb2_buffer *vb)
{
struct vpif_fh *fh = vb2_get_drv_priv(vb->vb2_queue);
struct vpif_disp_buffer *buf = container_of(vb,
struct vpif_disp_buffer, vb);
struct channel_obj *ch = fh->channel;
struct common_obj *common;
unsigned long flags;
common = &ch->common[VPIF_VIDEO_INDEX];
spin_lock_irqsave(&common->irqlock, flags);
if (vb->state == VB2_BUF_STATE_ACTIVE)
list_del_init(&buf->list);
spin_unlock_irqrestore(&common->irqlock, flags);
}
static void vpif_wait_prepare(struct vb2_queue *vq)
{
struct vpif_fh *fh = vb2_get_drv_priv(vq);
struct channel_obj *ch = fh->channel;
struct common_obj *common;
common = &ch->common[VPIF_VIDEO_INDEX];
mutex_unlock(&common->lock);
}
static void vpif_wait_finish(struct vb2_queue *vq)
{
struct vpif_fh *fh = vb2_get_drv_priv(vq);
struct channel_obj *ch = fh->channel;
struct common_obj *common;
common = &ch->common[VPIF_VIDEO_INDEX];
mutex_lock(&common->lock);
}
static int vpif_buffer_init(struct vb2_buffer *vb)
{
struct vpif_disp_buffer *buf = container_of(vb,
struct vpif_disp_buffer, vb);
INIT_LIST_HEAD(&buf->list);
return 0;
}
static u8 channel_first_int[VPIF_NUMOBJECTS][2] = { {1, 1} };
static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct vpif_display_config *vpif_config_data =
vpif_dev->platform_data;
struct vpif_fh *fh = vb2_get_drv_priv(vq);
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct vpif_params *vpif = &ch->vpifparams;
unsigned long addr = 0;
unsigned long flags;
int ret;
/* If buffer queue is empty, return error */
spin_lock_irqsave(&common->irqlock, flags);
if (list_empty(&common->dma_queue)) {
spin_unlock_irqrestore(&common->irqlock, flags);
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 vpif_disp_buffer, list);
list_del(&common->cur_frm->list);
spin_unlock_irqrestore(&common->irqlock, flags);
/* Mark state of the current frame to active */
common->cur_frm->vb.state = VB2_BUF_STATE_ACTIVE;
/* Initialize field_id and started member */
ch->field_id = 0;
common->started = 1;
addr = vb2_dma_contig_plane_dma_addr(&common->cur_frm->vb, 0);
/* 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 */
if (vpif_config_data->set_clock) {
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 */
channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
channel2_intr_assert();
channel2_intr_enable(1);
enable_channel2(1);
if (vpif_config_data->chan_config[VPIF_CHANNEL2_VIDEO].clip_en)
channel2_clipping_enable(1);
}
if ((VPIF_CHANNEL3_VIDEO == ch->channel_id)
|| (common->started == 2)) {
channel3_intr_assert();
channel3_intr_enable(1);
enable_channel3(1);
if (vpif_config_data->chan_config[VPIF_CHANNEL3_VIDEO].clip_en)
channel3_clipping_enable(1);
}
return 0;
}
/* abort streaming and wait for last buffer */
static int vpif_stop_streaming(struct vb2_queue *vq)
{
struct vpif_fh *fh = vb2_get_drv_priv(vq);
struct channel_obj *ch = fh->channel;
struct common_obj *common;
unsigned long flags;
if (!vb2_is_streaming(vq))
return 0;
common = &ch->common[VPIF_VIDEO_INDEX];
/* release all active buffers */
spin_lock_irqsave(&common->irqlock, flags);
while (!list_empty(&common->dma_queue)) {
common->next_frm = list_entry(common->dma_queue.next,
struct vpif_disp_buffer, list);
list_del(&common->next_frm->list);
vb2_buffer_done(&common->next_frm->vb, VB2_BUF_STATE_ERROR);
}
spin_unlock_irqrestore(&common->irqlock, flags);
return 0;
}
static struct vb2_ops video_qops = {
.queue_setup = vpif_buffer_queue_setup,
.wait_prepare = vpif_wait_prepare,
.wait_finish = vpif_wait_finish,
.buf_init = vpif_buffer_init,
.buf_prepare = vpif_buffer_prepare,
.start_streaming = vpif_start_streaming,
.stop_streaming = vpif_stop_streaming,
.buf_cleanup = vpif_buf_cleanup,
.buf_queue = vpif_buffer_queue,
};
static void process_progressive_mode(struct common_obj *common)
{
unsigned long addr = 0;
spin_lock(&common->irqlock);
/* Get the next buffer from buffer queue */
common->next_frm = list_entry(common->dma_queue.next,
struct vpif_disp_buffer, list);
/* Remove that buffer from the buffer queue */
list_del(&common->next_frm->list);
spin_unlock(&common->irqlock);
/* Mark status of the buffer as active */
common->next_frm->vb.state = VB2_BUF_STATE_ACTIVE;
/* Set top and bottom field addrs in VPIF registers */
addr = vb2_dma_contig_plane_dma_addr(&common->next_frm->vb, 0);
common->set_addr(addr + common->ytop_off,
addr + common->ybtm_off,
addr + common->ctop_off,
addr + common->cbtm_off);
}
static void process_interlaced_mode(int fid, struct common_obj *common)
{
/* device field id and local field id are in sync */
/* If this is even field */
if (0 == fid) {
if (common->cur_frm == common->next_frm)
return;
/* one frame is displayed If next frame is
* available, release cur_frm and move on */
/* Copy frame display time */
v4l2_get_timestamp(&common->cur_frm->vb.v4l2_buf.timestamp);
/* Change status of the cur_frm */
vb2_buffer_done(&common->cur_frm->vb,
VB2_BUF_STATE_DONE);
/* Make cur_frm pointing to next_frm */
common->cur_frm = common->next_frm;
} else if (1 == fid) { /* odd field */
spin_lock(&common->irqlock);
if (list_empty(&common->dma_queue)
|| (common->cur_frm != common->next_frm)) {
spin_unlock(&common->irqlock);
return;
}
spin_unlock(&common->irqlock);
/* one field is displayed configure the next
* frame if it is available else hold on current
* frame */
/* Get next from the buffer queue */
process_progressive_mode(common);
}
}
/*
* vpif_channel_isr: It changes status of the displayed 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 channel_obj *ch;
struct common_obj *common;
enum v4l2_field field;
int fid = -1, i;
int channel_id = 0;
channel_id = *(int *)(dev_id);
if (!vpif_intr_status(channel_id + 2))
return IRQ_NONE;
ch = dev->dev[channel_id];
field = ch->common[VPIF_VIDEO_INDEX].fmt.fmt.pix.field;
for (i = 0; i < VPIF_NUMOBJECTS; i++) {
common = &ch->common[i];
/* If streaming is started in this channel */
if (0 == common->started)
continue;
if (1 == ch->vpifparams.std_info.frm_fmt) {
spin_lock(&common->irqlock);
if (list_empty(&common->dma_queue)) {
spin_unlock(&common->irqlock);
continue;
}
spin_unlock(&common->irqlock);
/* Progressive mode */
if (!channel_first_int[i][channel_id]) {
/* Mark status of the cur_frm to
* done and unlock semaphore on it */
v4l2_get_timestamp(&common->cur_frm->vb.
v4l2_buf.timestamp);
vb2_buffer_done(&common->cur_frm->vb,
VB2_BUF_STATE_DONE);
/* Make cur_frm pointing to next_frm */
common->cur_frm = common->next_frm;
}
channel_first_int[i][channel_id] = 0;
process_progressive_mode(common);
} 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 + 2);
/* If fid does not match with stored field id */
if (fid != ch->field_id) {
/* Make them in sync */
if (0 == fid)
ch->field_id = fid;
return IRQ_HANDLED;
}
}
process_interlaced_mode(fid, common);
}
}
return IRQ_HANDLED;
}
static int vpif_update_std_info(struct channel_obj *ch)
{
struct video_obj *vid_ch = &ch->video;
struct vpif_params *vpifparams = &ch->vpifparams;
struct vpif_channel_config_params *std_info = &vpifparams->std_info;
const struct vpif_channel_config_params *config;
int i;
for (i = 0; i < vpif_ch_params_count; i++) {
config = &vpif_ch_params[i];
if (config->hd_sd == 0) {
vpif_dbg(2, debug, "SD format\n");
if (config->stdid & vid_ch->stdid) {
memcpy(std_info, config, sizeof(*config));
break;
}
}
}
if (i == vpif_ch_params_count) {
vpif_dbg(1, debug, "Format not found\n");
return -EINVAL;
}
return 0;
}
static int vpif_update_resolution(struct channel_obj *ch)
{
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct video_obj *vid_ch = &ch->video;
struct vpif_params *vpifparams = &ch->vpifparams;
struct vpif_channel_config_params *std_info = &vpifparams->std_info;
if (!vid_ch->stdid && !vid_ch->dv_timings.bt.height)
return -EINVAL;
if (vid_ch->stdid) {
if (vpif_update_std_info(ch))
return -EINVAL;
}
common->fmt.fmt.pix.width = std_info->width;
common->fmt.fmt.pix.height = std_info->height;
vpif_dbg(1, debug, "Pixel details: Width = %d,Height = %d\n",
common->fmt.fmt.pix.width, common->fmt.fmt.pix.height);
/* Set height and width paramateres */
common->height = std_info->height;
common->width = std_info->width;
return 0;
}
/*
* vpif_calculate_offsets: This function calculates buffers offset for Y and C
* in the top and bottom field
*/
static void vpif_calculate_offsets(struct channel_obj *ch)
{
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct vpif_params *vpifparams = &ch->vpifparams;
enum v4l2_field field = common->fmt.fmt.pix.field;
struct video_obj *vid_ch = &ch->video;
unsigned int hpitch, vpitch, sizeimage;
if (V4L2_FIELD_ANY == common->fmt.fmt.pix.field) {
if (ch->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;
}
sizeimage = common->fmt.fmt.pix.sizeimage;
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)) {
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) {
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) {
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 (ch->vpifparams.std_info.frm_fmt == 1) {
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 = ch->vpifparams.std_info.stdid;
}
static void vpif_config_format(struct channel_obj *ch)
{
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
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];
common->fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
common->fmt.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
}
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;
sizeimage = pixfmt->sizeimage;
if (vpif_update_resolution(ch))
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 void vpif_config_addr(struct channel_obj *ch, int muxmode)
{
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
if (VPIF_CHANNEL3_VIDEO == ch->channel_id) {
common->set_addr = ch3_set_videobuf_addr;
} else {
if (2 == muxmode)
common->set_addr = ch2_set_videobuf_addr_yc_nmux;
else
common->set_addr = ch2_set_videobuf_addr;
}
}
/*
* vpif_mmap: It is used to map kernel space buffers into user spaces
*/
static int vpif_mmap(struct file *filep, struct vm_area_struct *vma)
{
struct vpif_fh *fh = filep->private_data;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &(ch->common[VPIF_VIDEO_INDEX]);
int ret;
vpif_dbg(2, debug, "vpif_mmap\n");
if (mutex_lock_interruptible(&common->lock))
return -ERESTARTSYS;
ret = vb2_mmap(&common->buffer_queue, vma);
mutex_unlock(&common->lock);
return ret;
}
/*
* vpif_poll: It is used for select/poll system call
*/
static unsigned int vpif_poll(struct file *filep, poll_table *wait)
{
struct vpif_fh *fh = filep->private_data;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
unsigned int res = 0;
if (common->started) {
mutex_lock(&common->lock);
res = vb2_poll(&common->buffer_queue, filep, wait);
mutex_unlock(&common->lock);
}
return res;
}
/*
* 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 = video_get_drvdata(vdev);
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct vpif_fh *fh;
/* 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;
}
if (mutex_lock_interruptible(&common->lock)) {
kfree(fh);
return -ERESTARTSYS;
}
/* 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);
mutex_unlock(&common->lock);
return 0;
}
/*
* vpif_release: This function deletes buffer queue, frees the buffers and
* the vpif 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 = &ch->common[VPIF_VIDEO_INDEX];
mutex_lock(&common->lock);
/* 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 */
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;
/* Free buffers allocated */
vb2_queue_release(&common->buffer_queue);
vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
common->numbuffers =
config_params.numbuffers[ch->channel_id];
}
/* Decrement channel usrs counter */
atomic_dec(&ch->usrs);
/* If this file handle has initialize encoder device, reset it */
if (fh->initialized)
ch->initialized = 0;
/* Close the priority */
v4l2_prio_close(&ch->prio, fh->prio);
filep->private_data = NULL;
fh->initialized = 0;
mutex_unlock(&common->lock);
kfree(fh);
return 0;
}
/* functions implementing ioctls */
/**
* 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_display_config *config = vpif_dev->platform_data;
cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
snprintf(cap->driver, sizeof(cap->driver), "%s", dev_name(vpif_dev));
snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
dev_name(vpif_dev));
strlcpy(cap->card, config->card_name, sizeof(cap->card));
return 0;
}
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;
if (vpif_update_resolution(ch))
return -EINVAL;
*fmt = common->fmt;
return 0;
}
static int vpif_s_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *fmt)
{
struct vpif_fh *fh = priv;
struct v4l2_pix_format *pixfmt;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
int ret = 0;
if ((VPIF_CHANNEL2_VIDEO == ch->channel_id)
|| (VPIF_CHANNEL3_VIDEO == ch->channel_id)) {
if (!fh->initialized) {
vpif_dbg(1, debug, "Channel Busy\n");
return -EBUSY;
}
/* Check for the priority */
ret = v4l2_prio_check(&ch->prio, fh->prio);
if (0 != ret)
return ret;
fh->initialized = 1;
}
if (common->started) {
vpif_dbg(1, debug, "Streaming in progress\n");
return -EBUSY;
}
pixfmt = &fmt->fmt.pix;
/* Check for valid field format */
ret = vpif_check_format(ch, pixfmt);
if (ret)
return ret;
/* store the pix format in the channel object */
common->fmt.fmt.pix = *pixfmt;
/* store the format in the channel object */
common->fmt = *fmt;
return 0;
}
static int vpif_try_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];
struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
int ret = 0;
ret = vpif_check_format(ch, pixfmt);
if (ret) {
*pixfmt = common->fmt.fmt.pix;
pixfmt->sizeimage = pixfmt->width * pixfmt->height * 2;
}
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;
struct vb2_queue *q;
u8 index = 0;
int ret;
/* 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 || !vpif_dev)
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 videobuf2 queue as per the buffer type */
common->alloc_ctx = vb2_dma_contig_init_ctx(vpif_dev);
if (IS_ERR(common->alloc_ctx)) {
vpif_err("Failed to get the context\n");
return PTR_ERR(common->alloc_ctx);
}
q = &common->buffer_queue;
q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
q->io_modes = VB2_MMAP | VB2_USERPTR;
q->drv_priv = fh;
q->ops = &video_qops;
q->mem_ops = &vb2_dma_contig_memops;
q->buf_struct_size = sizeof(struct vpif_disp_buffer);
q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
ret = vb2_queue_init(q);
if (ret) {
vpif_err("vpif_display: vb2_queue_init() failed\n");
vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
return ret;
}
/* 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 vb2_reqbufs(&common->buffer_queue, reqbuf);
}
static int vpif_querybuf(struct file *file, void *priv,
struct v4l2_buffer *tbuf)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
if (common->fmt.type != tbuf->type)
return -EINVAL;
return vb2_querybuf(&common->buffer_queue, tbuf);
}
static int vpif_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
{
struct vpif_fh *fh = NULL;
struct channel_obj *ch = NULL;
struct common_obj *common = NULL;
if (!buf || !priv)
return -EINVAL;
fh = priv;
ch = fh->channel;
if (!ch)
return -EINVAL;
common = &(ch->common[VPIF_VIDEO_INDEX]);
if (common->fmt.type != buf->type)
return -EINVAL;
if (!fh->io_allowed[VPIF_VIDEO_INDEX]) {
vpif_err("fh->io_allowed\n");
return -EACCES;
}
return vb2_qbuf(&common->buffer_queue, buf);
}
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 & VPIF_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;
memset(&ch->video.dv_timings, 0, sizeof(ch->video.dv_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_g_std(struct file *file, void *priv, v4l2_std_id *std)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
*std = ch->video.stdid;
return 0;
}
static int vpif_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
return vb2_dqbuf(&common->buffer_queue, p,
(file->f_flags & O_NONBLOCK));
}
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];
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 vb2_streamon to start streaming in videobuf2 */
ret = vb2_streamon(&common->buffer_queue, buftype);
if (ret < 0) {
vpif_err("vb2_streamon\n");
return ret;
}
return ret;
}
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];
struct vpif_display_config *vpif_config_data =
vpif_dev->platform_data;
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 (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
/* disable channel */
if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
if (vpif_config_data->
chan_config[VPIF_CHANNEL2_VIDEO].clip_en)
channel2_clipping_enable(0);
enable_channel2(0);
channel2_intr_enable(0);
}
if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
(2 == common->started)) {
if (vpif_config_data->
chan_config[VPIF_CHANNEL3_VIDEO].clip_en)
channel3_clipping_enable(0);
enable_channel3(0);
channel3_intr_enable(0);
}
}
common->started = 0;
return vb2_streamoff(&common->buffer_queue, buftype);
}
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_OUTPUT != crop->type)
return -EINVAL;
crop->bounds.left = crop->bounds.top = 0;
crop->defrect.left = crop->defrect.top = 0;
crop->defrect.height = crop->bounds.height = common->height;
crop->defrect.width = crop->bounds.width = common->width;
return 0;
}
static int vpif_enum_output(struct file *file, void *fh,
struct v4l2_output *output)
{
struct vpif_display_config *config = vpif_dev->platform_data;
struct vpif_display_chan_config *chan_cfg;
struct vpif_fh *vpif_handler = fh;
struct channel_obj *ch = vpif_handler->channel;
chan_cfg = &config->chan_config[ch->channel_id];
if (output->index >= chan_cfg->output_count) {
vpif_dbg(1, debug, "Invalid output index\n");
return -EINVAL;
}
*output = chan_cfg->outputs[output->index].output;
return 0;
}
/**
* vpif_output_to_subdev() - Maps output to sub device
* @vpif_cfg - global config ptr
* @chan_cfg - channel config ptr
* @index - Given output index from application
*
* lookup the sub device information for a given output index.
* we report all the output to application. output table also
* has sub device name for the each output
*/
static int
vpif_output_to_subdev(struct vpif_display_config *vpif_cfg,
struct vpif_display_chan_config *chan_cfg, int index)
{
struct vpif_subdev_info *subdev_info;
const char *subdev_name;
int i;
vpif_dbg(2, debug, "vpif_output_to_subdev\n");
if (chan_cfg->outputs == NULL)
return -1;
subdev_name = chan_cfg->outputs[index].subdev_name;
if (subdev_name == NULL)
return -1;
/* 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->subdevinfo[i];
if (!strcmp(subdev_info->name, subdev_name))
return i;
}
return -1;
}
/**
* vpif_set_output() - Select an output
* @vpif_cfg - global config ptr
* @ch - channel
* @index - Given output index from application
*
* Select the given output.
*/
static int vpif_set_output(struct vpif_display_config *vpif_cfg,
struct channel_obj *ch, int index)
{
struct vpif_display_chan_config *chan_cfg =
&vpif_cfg->chan_config[ch->channel_id];
struct vpif_subdev_info *subdev_info = NULL;
struct v4l2_subdev *sd = NULL;
u32 input = 0, output = 0;
int sd_index;
int ret;
sd_index = vpif_output_to_subdev(vpif_cfg, chan_cfg, index);
if (sd_index >= 0) {
sd = vpif_obj.sd[sd_index];
subdev_info = &vpif_cfg->subdevinfo[sd_index];
}
if (sd) {
input = chan_cfg->outputs[index].input_route;
output = chan_cfg->outputs[index].output_route;
ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
if (ret < 0 && ret != -ENOIOCTLCMD) {
vpif_err("Failed to set output\n");
return ret;
}
}
ch->output_idx = index;
ch->sd = sd;
if (chan_cfg->outputs != NULL)
/* update tvnorms from the sub device output info */
ch->video_dev->tvnorms = chan_cfg->outputs[index].output.std;
return 0;
}
static int vpif_s_output(struct file *file, void *priv, unsigned int i)
{
struct vpif_display_config *config = vpif_dev->platform_data;
struct vpif_display_chan_config *chan_cfg;
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
chan_cfg = &config->chan_config[ch->channel_id];
if (i >= chan_cfg->output_count)
return -EINVAL;
if (common->started) {
vpif_err("Streaming in progress\n");
return -EBUSY;
}
return vpif_set_output(config, ch, i);
}
static int vpif_g_output(struct file *file, void *priv, unsigned int *i)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
*i = ch->output_idx;
return 0;
}
static int vpif_g_priority(struct file *file, void *priv, enum v4l2_priority *p)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
*p = v4l2_prio_max(&ch->prio);
return 0;
}
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_enum_dv_timings() - ENUM_DV_TIMINGS handler
* @file: file ptr
* @priv: file handle
* @timings: input timings
*/
static int
vpif_enum_dv_timings(struct file *file, void *priv,
struct v4l2_enum_dv_timings *timings)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
int ret;
ret = v4l2_subdev_call(ch->sd, video, enum_dv_timings, timings);
if (ret == -ENOIOCTLCMD || ret == -ENODEV)
return -EINVAL;
return ret;
}
/**
* vpif_s_dv_timings() - S_DV_TIMINGS handler
* @file: file ptr
* @priv: file handle
* @timings: digital video timings
*/
static int vpif_s_dv_timings(struct file *file, void *priv,
struct v4l2_dv_timings *timings)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct vpif_params *vpifparams = &ch->vpifparams;
struct vpif_channel_config_params *std_info = &vpifparams->std_info;
struct video_obj *vid_ch = &ch->video;
struct v4l2_bt_timings *bt = &vid_ch->dv_timings.bt;
int ret;
if (timings->type != V4L2_DV_BT_656_1120) {
vpif_dbg(2, debug, "Timing type not defined\n");
return -EINVAL;
}
/* Configure subdevice timings, if any */
ret = v4l2_subdev_call(ch->sd, video, s_dv_timings, timings);
if (ret == -ENOIOCTLCMD || ret == -ENODEV)
ret = 0;
if (ret < 0) {
vpif_dbg(2, debug, "Error setting custom DV timings\n");
return ret;
}
if (!(timings->bt.width && timings->bt.height &&
(timings->bt.hbackporch ||
timings->bt.hfrontporch ||
timings->bt.hsync) &&
timings->bt.vfrontporch &&
(timings->bt.vbackporch ||
timings->bt.vsync))) {
vpif_dbg(2, debug, "Timings for width, height, "
"horizontal back porch, horizontal sync, "
"horizontal front porch, vertical back porch, "
"vertical sync and vertical back porch "
"must be defined\n");
return -EINVAL;
}
vid_ch->dv_timings = *timings;
/* Configure video port timings */
std_info->eav2sav = bt->hbackporch + bt->hfrontporch +
bt->hsync - 8;
std_info->sav2eav = bt->width;
std_info->l1 = 1;
std_info->l3 = bt->vsync + bt->vbackporch + 1;
if (bt->interlaced) {
if (bt->il_vbackporch || bt->il_vfrontporch || bt->il_vsync) {
std_info->vsize = bt->height * 2 +
bt->vfrontporch + bt->vsync + bt->vbackporch +
bt->il_vfrontporch + bt->il_vsync +
bt->il_vbackporch;
std_info->l5 = std_info->vsize/2 -
(bt->vfrontporch - 1);
std_info->l7 = std_info->vsize/2 + 1;
std_info->l9 = std_info->l7 + bt->il_vsync +
bt->il_vbackporch + 1;
std_info->l11 = std_info->vsize -
(bt->il_vfrontporch - 1);
} else {
vpif_dbg(2, debug, "Required timing values for "
"interlaced BT format missing\n");
return -EINVAL;
}
} else {
std_info->vsize = bt->height + bt->vfrontporch +
bt->vsync + bt->vbackporch;
std_info->l5 = std_info->vsize - (bt->vfrontporch - 1);
}
strncpy(std_info->name, "Custom timings BT656/1120",
VPIF_MAX_NAME);
std_info->width = bt->width;
std_info->height = bt->height;
std_info->frm_fmt = bt->interlaced ? 0 : 1;
std_info->ycmux_mode = 0;
std_info->capture_format = 0;
std_info->vbi_supported = 0;
std_info->hd_sd = 1;
std_info->stdid = 0;
vid_ch->stdid = 0;
return 0;
}
/**
* vpif_g_dv_timings() - G_DV_TIMINGS handler
* @file: file ptr
* @priv: file handle
* @timings: digital video timings
*/
static int vpif_g_dv_timings(struct file *file, void *priv,
struct v4l2_dv_timings *timings)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct video_obj *vid_ch = &ch->video;
*timings = vid_ch->dv_timings;
return 0;
}
/*
* vpif_g_chip_ident() - Identify the chip
* @file: file ptr
* @priv: file handle
* @chip: chip identity
*
* Returns zero or -EINVAL if read operations fails.
*/
static int vpif_g_chip_ident(struct file *file, void *priv,
struct v4l2_dbg_chip_ident *chip)
{
chip->ident = V4L2_IDENT_NONE;
chip->revision = 0;
if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER &&
chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR) {
vpif_dbg(2, debug, "match_type is invalid.\n");
return -EINVAL;
}
return v4l2_device_call_until_err(&vpif_obj.v4l2_dev, 0, core,
g_chip_ident, chip);
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
/*
* vpif_dbg_g_register() - Read register
* @file: file ptr
* @priv: file handle
* @reg: register to be read
*
* Debugging only
* Returns zero or -EINVAL if read operations fails.
*/
static int vpif_dbg_g_register(struct file *file, void *priv,
struct v4l2_dbg_register *reg){
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
return v4l2_subdev_call(ch->sd, core, g_register, reg);
}
/*
* vpif_dbg_s_register() - Write to register
* @file: file ptr
* @priv: file handle
* @reg: register to be modified
*
* Debugging only
* Returns zero or -EINVAL if write operations fails.
*/
static int vpif_dbg_s_register(struct file *file, void *priv,
const struct v4l2_dbg_register *reg)
{
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
return v4l2_subdev_call(ch->sd, core, s_register, reg);
}
#endif
/*
* vpif_log_status() - Status information
* @file: file ptr
* @priv: file handle
*
* Returns zero.
*/
static int vpif_log_status(struct file *filep, void *priv)
{
/* status for sub devices */
v4l2_device_call_all(&vpif_obj.v4l2_dev, 0, core, log_status);
return 0;
}
/* vpif display 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_out = vpif_enum_fmt_vid_out,
.vidioc_g_fmt_vid_out = vpif_g_fmt_vid_out,
.vidioc_s_fmt_vid_out = vpif_s_fmt_vid_out,
.vidioc_try_fmt_vid_out = vpif_try_fmt_vid_out,
.vidioc_reqbufs = vpif_reqbufs,
.vidioc_querybuf = vpif_querybuf,
.vidioc_qbuf = vpif_qbuf,
.vidioc_dqbuf = vpif_dqbuf,
.vidioc_streamon = vpif_streamon,
.vidioc_streamoff = vpif_streamoff,
.vidioc_s_std = vpif_s_std,
.vidioc_g_std = vpif_g_std,
.vidioc_enum_output = vpif_enum_output,
.vidioc_s_output = vpif_s_output,
.vidioc_g_output = vpif_g_output,
.vidioc_cropcap = vpif_cropcap,
.vidioc_enum_dv_timings = vpif_enum_dv_timings,
.vidioc_s_dv_timings = vpif_s_dv_timings,
.vidioc_g_dv_timings = vpif_g_dv_timings,
.vidioc_g_chip_ident = vpif_g_chip_ident,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.vidioc_g_register = vpif_dbg_g_register,
.vidioc_s_register = vpif_dbg_s_register,
#endif
.vidioc_log_status = vpif_log_status,
};
static const struct v4l2_file_operations vpif_fops = {
.owner = THIS_MODULE,
.open = vpif_open,
.release = vpif_release,
.unlocked_ioctl = video_ioctl2,
.mmap = vpif_mmap,
.poll = vpif_poll
};
static struct video_device vpif_video_template = {
.name = "vpif",
.fops = &vpif_fops,
.ioctl_ops = &vpif_ioctl_ops,
};
/*Configure the channels, buffer sizei, request irq */
static int initialize_vpif(void)
{
int free_channel_objects_index;
int free_buffer_channel_index;
int free_buffer_index;
int err = 0, i, j;
/* Default number of buffers should be 3 */
if ((ch2_numbuffers > 0) &&
(ch2_numbuffers < config_params.min_numbuffers))
ch2_numbuffers = config_params.min_numbuffers;
if ((ch3_numbuffers > 0) &&
(ch3_numbuffers < config_params.min_numbuffers))
ch3_numbuffers = config_params.min_numbuffers;
/* Set buffer size to min buffers size if invalid buffer size is
* given */
if (ch2_bufsize < config_params.min_bufsize[VPIF_CHANNEL2_VIDEO])
ch2_bufsize =
config_params.min_bufsize[VPIF_CHANNEL2_VIDEO];
if (ch3_bufsize < config_params.min_bufsize[VPIF_CHANNEL3_VIDEO])
ch3_bufsize =
config_params.min_bufsize[VPIF_CHANNEL3_VIDEO];
config_params.numbuffers[VPIF_CHANNEL2_VIDEO] = ch2_numbuffers;
if (ch2_numbuffers) {
config_params.channel_bufsize[VPIF_CHANNEL2_VIDEO] =
ch2_bufsize;
}
config_params.numbuffers[VPIF_CHANNEL3_VIDEO] = ch3_numbuffers;
if (ch3_numbuffers) {
config_params.channel_bufsize[VPIF_CHANNEL3_VIDEO] =
ch3_bufsize;
}
/* Allocate memory for six channel objects */
for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
vpif_obj.dev[i] =
kzalloc(sizeof(struct channel_obj), 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;
}
}
free_channel_objects_index = VPIF_DISPLAY_MAX_DEVICES;
free_buffer_channel_index = VPIF_DISPLAY_NUM_CHANNELS;
free_buffer_index = config_params.numbuffers[i - 1];
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 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, err = 0;
int res_idx = 0;
struct i2c_adapter *i2c_adap;
struct common_obj *common;
struct channel_obj *ch;
struct video_device *vfd;
struct resource *res;
int subdev_count;
size_t size;
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;
}
while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
for (i = res->start; i <= res->end; i++) {
if (request_irq(i, vpif_channel_isr, IRQF_SHARED,
"VPIF_Display", (void *)
(&vpif_obj.dev[res_idx]->channel_id))) {
err = -EBUSY;
for (j = 0; j < i; j++)
free_irq(j, (void *)
(&vpif_obj.dev[res_idx]->channel_id));
goto vpif_int_err;
}
}
res_idx++;
}
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;
vfd->vfl_dir = VFL_DIR_TX;
snprintf(vfd->name, sizeof(vfd->name),
"VPIF_Display_DRIVER_V%s",
VPIF_DISPLAY_VERSION);
/* Set video_dev to the video device */
ch->video_dev = vfd;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res) {
size = resource_size(res);
/* The resources are divided into two equal memory and when
* we have HD output we can add them together
*/
for (j = 0; j < VPIF_DISPLAY_MAX_DEVICES; j++) {
ch = vpif_obj.dev[j];
ch->channel_id = j;
/* only enabled if second resource exists */
config_params.video_limit[ch->channel_id] = 0;
if (size)
config_params.video_limit[ch->channel_id] =
size/2;
}
}
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 vpif_sd_error;
}
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;
}
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;
if (subdev_count)
ch->sd = vpif_obj.sd[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;
video_set_drvdata(ch->video_dev, ch);
/* select output 0 */
err = vpif_set_output(config, ch, 0);
if (err)
goto probe_out;
/* 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;
}
v4l2_info(&vpif_obj.v4l2_dev,
" VPIF display driver initialized\n");
return 0;
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;
}
probe_subdev_out:
kfree(vpif_obj.sd);
vpif_sd_error:
for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
ch = vpif_obj.dev[i];
/* Note: does nothing if ch->video_dev == NULL */
video_device_release(ch->video_dev);
}
vpif_int_err:
v4l2_device_unregister(&vpif_obj.v4l2_dev);
vpif_err("VPIF IRQ request failed\n");
for (i = 0; i < res_idx; i++) {
res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
for (j = res->start; j <= res->end; j++)
free_irq(j, (void *)(&vpif_obj.dev[i]->channel_id));
}
return err;
}
/*
* vpif_remove: It un-register channels from V4L2 driver
*/
static int vpif_remove(struct platform_device *device)
{
struct channel_obj *ch;
int i;
v4l2_device_unregister(&vpif_obj.v4l2_dev);
/* un-register device */
for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
/* Get the pointer to the channel object */
ch = vpif_obj.dev[i];
/* Unregister video device */
video_unregister_device(ch->video_dev);
ch->video_dev = NULL;
}
return 0;
}
#ifdef CONFIG_PM
static int vpif_suspend(struct device *dev)
{
struct common_obj *common;
struct channel_obj *ch;
int i;
for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
/* Get the pointer to the channel object */
ch = vpif_obj.dev[i];
common = &ch->common[VPIF_VIDEO_INDEX];
mutex_lock(&common->lock);
if (atomic_read(&ch->usrs) && common->io_usrs) {
/* Disable channel */
if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
enable_channel2(0);
channel2_intr_enable(0);
}
if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
common->started == 2) {
enable_channel3(0);
channel3_intr_enable(0);
}
}
mutex_unlock(&common->lock);
}
return 0;
}
static int vpif_resume(struct device *dev)
{
struct common_obj *common;
struct channel_obj *ch;
int i;
for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
/* Get the pointer to the channel object */
ch = vpif_obj.dev[i];
common = &ch->common[VPIF_VIDEO_INDEX];
mutex_lock(&common->lock);
if (atomic_read(&ch->usrs) && common->io_usrs) {
/* Enable channel */
if (ch->channel_id == VPIF_CHANNEL2_VIDEO) {
enable_channel2(1);
channel2_intr_enable(1);
}
if (ch->channel_id == VPIF_CHANNEL3_VIDEO ||
common->started == 2) {
enable_channel3(1);
channel3_intr_enable(1);
}
}
mutex_unlock(&common->lock);
}
return 0;
}
static const struct dev_pm_ops vpif_pm = {
.suspend = vpif_suspend,
.resume = vpif_resume,
};
#define vpif_pm_ops (&vpif_pm)
#else
#define vpif_pm_ops NULL
#endif
static __refdata struct platform_driver vpif_driver = {
.driver = {
.name = "vpif_display",
.owner = THIS_MODULE,
.pm = vpif_pm_ops,
},
.probe = vpif_probe,
.remove = vpif_remove,
};
static __init int vpif_init(void)
{
return platform_driver_register(&vpif_driver);
}
/*
* vpif_cleanup: This function 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_DISPLAY_MAX_DEVICES; i++)
kfree(vpif_obj.dev[i]);
}
module_init(vpif_init);
module_exit(vpif_cleanup);