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linux_dsm_epyc7002/drivers/media/video/davinci/vpfe_capture.c
Laurent Pinchart 9a1f8b34aa [media] v4l: Remove module_name argument to the v4l2_i2c_new_subdev* functions 
The argument isn't used anymore by the functions, remove it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-11-22 11:56:26 -02:00

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/*
* Copyright (C) 2008-2009 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
*
* Driver name : VPFE Capture driver
* VPFE Capture driver allows applications to capture and stream video
* frames on DaVinci SoCs (DM6446, DM355 etc) from a YUV source such as
* TVP5146 or Raw Bayer RGB image data from an image sensor
* such as Microns' MT9T001, MT9T031 etc.
*
* These SoCs have, in common, a Video Processing Subsystem (VPSS) that
* consists of a Video Processing Front End (VPFE) for capturing
* video/raw image data and Video Processing Back End (VPBE) for displaying
* YUV data through an in-built analog encoder or Digital LCD port. This
* driver is for capture through VPFE. A typical EVM using these SoCs have
* following high level configuration.
*
*
* decoder(TVP5146/ YUV/
* MT9T001) --> Raw Bayer RGB ---> MUX -> VPFE (CCDC/ISIF)
* data input | |
* V |
* SDRAM |
* V
* Image Processor
* |
* V
* SDRAM
* The data flow happens from a decoder connected to the VPFE over a
* YUV embedded (BT.656/BT.1120) or separate sync or raw bayer rgb interface
* and to the input of VPFE through an optional MUX (if more inputs are
* to be interfaced on the EVM). The input data is first passed through
* CCDC (CCD Controller, a.k.a Image Sensor Interface, ISIF). The CCDC
* does very little or no processing on YUV data and does pre-process Raw
* Bayer RGB data through modules such as Defect Pixel Correction (DFC)
* Color Space Conversion (CSC), data gain/offset etc. After this, data
* can be written to SDRAM or can be connected to the image processing
* block such as IPIPE (on DM355 only).
*
* Features supported
* - MMAP IO
* - Capture using TVP5146 over BT.656
* - support for interfacing decoders using sub device model
* - Work with DM355 or DM6446 CCDC to do Raw Bayer RGB/YUV
* data capture to SDRAM.
* TODO list
* - Support multiple REQBUF after open
* - Support for de-allocating buffers through REQBUF
* - Support for Raw Bayer RGB capture
* - Support for chaining Image Processor
* - Support for static allocation of buffers
* - Support for USERPTR IO
* - Support for STREAMON before QBUF
* - Support for control ioctls
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <media/v4l2-common.h>
#include <linux/io.h>
#include <media/davinci/vpfe_capture.h>
#include "ccdc_hw_device.h"
static int debug;
static u32 numbuffers = 3;
static u32 bufsize = (720 * 576 * 2);
module_param(numbuffers, uint, S_IRUGO);
module_param(bufsize, uint, S_IRUGO);
module_param(debug, int, 0644);
MODULE_PARM_DESC(numbuffers, "buffer count (default:3)");
MODULE_PARM_DESC(bufsize, "buffer size in bytes (default:720 x 576 x 2)");
MODULE_PARM_DESC(debug, "Debug level 0-1");
MODULE_DESCRIPTION("VPFE Video for Linux Capture Driver");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Texas Instruments");
/* standard information */
struct vpfe_standard {
v4l2_std_id std_id;
unsigned int width;
unsigned int height;
struct v4l2_fract pixelaspect;
/* 0 - progressive, 1 - interlaced */
int frame_format;
};
/* ccdc configuration */
struct ccdc_config {
/* This make sure vpfe is probed and ready to go */
int vpfe_probed;
/* name of ccdc device */
char name[32];
};
/* data structures */
static struct vpfe_config_params config_params = {
.min_numbuffers = 3,
.numbuffers = 3,
.min_bufsize = 720 * 480 * 2,
.device_bufsize = 720 * 576 * 2,
};
/* ccdc device registered */
static struct ccdc_hw_device *ccdc_dev;
/* lock for accessing ccdc information */
static DEFINE_MUTEX(ccdc_lock);
/* ccdc configuration */
static struct ccdc_config *ccdc_cfg;
const struct vpfe_standard vpfe_standards[] = {
{V4L2_STD_525_60, 720, 480, {11, 10}, 1},
{V4L2_STD_625_50, 720, 576, {54, 59}, 1},
};
/* Used when raw Bayer image from ccdc is directly captured to SDRAM */
static const struct vpfe_pixel_format vpfe_pix_fmts[] = {
{
.fmtdesc = {
.index = 0,
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
.description = "Bayer GrRBGb 8bit A-Law compr.",
.pixelformat = V4L2_PIX_FMT_SBGGR8,
},
.bpp = 1,
},
{
.fmtdesc = {
.index = 1,
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
.description = "Bayer GrRBGb - 16bit",
.pixelformat = V4L2_PIX_FMT_SBGGR16,
},
.bpp = 2,
},
{
.fmtdesc = {
.index = 2,
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
.description = "Bayer GrRBGb 8bit DPCM compr.",
.pixelformat = V4L2_PIX_FMT_SGRBG10DPCM8,
},
.bpp = 1,
},
{
.fmtdesc = {
.index = 3,
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
.description = "YCbCr 4:2:2 Interleaved UYVY",
.pixelformat = V4L2_PIX_FMT_UYVY,
},
.bpp = 2,
},
{
.fmtdesc = {
.index = 4,
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
.description = "YCbCr 4:2:2 Interleaved YUYV",
.pixelformat = V4L2_PIX_FMT_YUYV,
},
.bpp = 2,
},
{
.fmtdesc = {
.index = 5,
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
.description = "Y/CbCr 4:2:0 - Semi planar",
.pixelformat = V4L2_PIX_FMT_NV12,
},
.bpp = 1,
},
};
/*
* vpfe_lookup_pix_format()
* lookup an entry in the vpfe pix format table based on pix_format
*/
static const struct vpfe_pixel_format *vpfe_lookup_pix_format(u32 pix_format)
{
int i;
for (i = 0; i < ARRAY_SIZE(vpfe_pix_fmts); i++) {
if (pix_format == vpfe_pix_fmts[i].fmtdesc.pixelformat)
return &vpfe_pix_fmts[i];
}
return NULL;
}
/*
* vpfe_register_ccdc_device. CCDC module calls this to
* register with vpfe capture
*/
int vpfe_register_ccdc_device(struct ccdc_hw_device *dev)
{
int ret = 0;
printk(KERN_NOTICE "vpfe_register_ccdc_device: %s\n", dev->name);
BUG_ON(!dev->hw_ops.open);
BUG_ON(!dev->hw_ops.enable);
BUG_ON(!dev->hw_ops.set_hw_if_params);
BUG_ON(!dev->hw_ops.configure);
BUG_ON(!dev->hw_ops.set_buftype);
BUG_ON(!dev->hw_ops.get_buftype);
BUG_ON(!dev->hw_ops.enum_pix);
BUG_ON(!dev->hw_ops.set_frame_format);
BUG_ON(!dev->hw_ops.get_frame_format);
BUG_ON(!dev->hw_ops.get_pixel_format);
BUG_ON(!dev->hw_ops.set_pixel_format);
BUG_ON(!dev->hw_ops.set_image_window);
BUG_ON(!dev->hw_ops.get_image_window);
BUG_ON(!dev->hw_ops.get_line_length);
BUG_ON(!dev->hw_ops.getfid);
mutex_lock(&ccdc_lock);
if (NULL == ccdc_cfg) {
/*
* TODO. Will this ever happen? if so, we need to fix it.
* Proabably we need to add the request to a linked list and
* walk through it during vpfe probe
*/
printk(KERN_ERR "vpfe capture not initialized\n");
ret = -EFAULT;
goto unlock;
}
if (strcmp(dev->name, ccdc_cfg->name)) {
/* ignore this ccdc */
ret = -EINVAL;
goto unlock;
}
if (ccdc_dev) {
printk(KERN_ERR "ccdc already registered\n");
ret = -EINVAL;
goto unlock;
}
ccdc_dev = dev;
unlock:
mutex_unlock(&ccdc_lock);
return ret;
}
EXPORT_SYMBOL(vpfe_register_ccdc_device);
/*
* vpfe_unregister_ccdc_device. CCDC module calls this to
* unregister with vpfe capture
*/
void vpfe_unregister_ccdc_device(struct ccdc_hw_device *dev)
{
if (NULL == dev) {
printk(KERN_ERR "invalid ccdc device ptr\n");
return;
}
printk(KERN_NOTICE "vpfe_unregister_ccdc_device, dev->name = %s\n",
dev->name);
if (strcmp(dev->name, ccdc_cfg->name)) {
/* ignore this ccdc */
return;
}
mutex_lock(&ccdc_lock);
ccdc_dev = NULL;
mutex_unlock(&ccdc_lock);
return;
}
EXPORT_SYMBOL(vpfe_unregister_ccdc_device);
/*
* vpfe_get_ccdc_image_format - Get image parameters based on CCDC settings
*/
static int vpfe_get_ccdc_image_format(struct vpfe_device *vpfe_dev,
struct v4l2_format *f)
{
struct v4l2_rect image_win;
enum ccdc_buftype buf_type;
enum ccdc_frmfmt frm_fmt;
memset(f, 0, sizeof(*f));
f->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
ccdc_dev->hw_ops.get_image_window(&image_win);
f->fmt.pix.width = image_win.width;
f->fmt.pix.height = image_win.height;
f->fmt.pix.bytesperline = ccdc_dev->hw_ops.get_line_length();
f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
f->fmt.pix.height;
buf_type = ccdc_dev->hw_ops.get_buftype();
f->fmt.pix.pixelformat = ccdc_dev->hw_ops.get_pixel_format();
frm_fmt = ccdc_dev->hw_ops.get_frame_format();
if (frm_fmt == CCDC_FRMFMT_PROGRESSIVE)
f->fmt.pix.field = V4L2_FIELD_NONE;
else if (frm_fmt == CCDC_FRMFMT_INTERLACED) {
if (buf_type == CCDC_BUFTYPE_FLD_INTERLEAVED)
f->fmt.pix.field = V4L2_FIELD_INTERLACED;
else if (buf_type == CCDC_BUFTYPE_FLD_SEPARATED)
f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
else {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf_type\n");
return -EINVAL;
}
} else {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid frm_fmt\n");
return -EINVAL;
}
return 0;
}
/*
* vpfe_config_ccdc_image_format()
* For a pix format, configure ccdc to setup the capture
*/
static int vpfe_config_ccdc_image_format(struct vpfe_device *vpfe_dev)
{
enum ccdc_frmfmt frm_fmt = CCDC_FRMFMT_INTERLACED;
int ret = 0;
if (ccdc_dev->hw_ops.set_pixel_format(
vpfe_dev->fmt.fmt.pix.pixelformat) < 0) {
v4l2_err(&vpfe_dev->v4l2_dev,
"couldn't set pix format in ccdc\n");
return -EINVAL;
}
/* configure the image window */
ccdc_dev->hw_ops.set_image_window(&vpfe_dev->crop);
switch (vpfe_dev->fmt.fmt.pix.field) {
case V4L2_FIELD_INTERLACED:
/* do nothing, since it is default */
ret = ccdc_dev->hw_ops.set_buftype(
CCDC_BUFTYPE_FLD_INTERLEAVED);
break;
case V4L2_FIELD_NONE:
frm_fmt = CCDC_FRMFMT_PROGRESSIVE;
/* buffer type only applicable for interlaced scan */
break;
case V4L2_FIELD_SEQ_TB:
ret = ccdc_dev->hw_ops.set_buftype(
CCDC_BUFTYPE_FLD_SEPARATED);
break;
default:
return -EINVAL;
}
/* set the frame format */
if (!ret)
ret = ccdc_dev->hw_ops.set_frame_format(frm_fmt);
return ret;
}
/*
* vpfe_config_image_format()
* For a given standard, this functions sets up the default
* pix format & crop values in the vpfe device and ccdc. It first
* starts with defaults based values from the standard table.
* It then checks if sub device support g_mbus_fmt and then override the
* values based on that.Sets crop values to match with scan resolution
* starting at 0,0. It calls vpfe_config_ccdc_image_format() set the
* values in ccdc
*/
static int vpfe_config_image_format(struct vpfe_device *vpfe_dev,
const v4l2_std_id *std_id)
{
struct vpfe_subdev_info *sdinfo = vpfe_dev->current_subdev;
struct v4l2_mbus_framefmt mbus_fmt;
struct v4l2_pix_format *pix = &vpfe_dev->fmt.fmt.pix;
int i, ret = 0;
for (i = 0; i < ARRAY_SIZE(vpfe_standards); i++) {
if (vpfe_standards[i].std_id & *std_id) {
vpfe_dev->std_info.active_pixels =
vpfe_standards[i].width;
vpfe_dev->std_info.active_lines =
vpfe_standards[i].height;
vpfe_dev->std_info.frame_format =
vpfe_standards[i].frame_format;
vpfe_dev->std_index = i;
break;
}
}
if (i == ARRAY_SIZE(vpfe_standards)) {
v4l2_err(&vpfe_dev->v4l2_dev, "standard not supported\n");
return -EINVAL;
}
vpfe_dev->crop.top = 0;
vpfe_dev->crop.left = 0;
vpfe_dev->crop.width = vpfe_dev->std_info.active_pixels;
vpfe_dev->crop.height = vpfe_dev->std_info.active_lines;
pix->width = vpfe_dev->crop.width;
pix->height = vpfe_dev->crop.height;
/* first field and frame format based on standard frame format */
if (vpfe_dev->std_info.frame_format) {
pix->field = V4L2_FIELD_INTERLACED;
/* assume V4L2_PIX_FMT_UYVY as default */
pix->pixelformat = V4L2_PIX_FMT_UYVY;
v4l2_fill_mbus_format(&mbus_fmt, pix,
V4L2_MBUS_FMT_YUYV10_2X10);
} else {
pix->field = V4L2_FIELD_NONE;
/* assume V4L2_PIX_FMT_SBGGR8 */
pix->pixelformat = V4L2_PIX_FMT_SBGGR8;
v4l2_fill_mbus_format(&mbus_fmt, pix,
V4L2_MBUS_FMT_SBGGR8_1X8);
}
/* if sub device supports g_mbus_fmt, override the defaults */
ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
sdinfo->grp_id, video, g_mbus_fmt, &mbus_fmt);
if (ret && ret != -ENOIOCTLCMD) {
v4l2_err(&vpfe_dev->v4l2_dev,
"error in getting g_mbus_fmt from sub device\n");
return ret;
}
v4l2_fill_pix_format(pix, &mbus_fmt);
pix->bytesperline = pix->width * 2;
pix->sizeimage = pix->bytesperline * pix->height;
/* Sets the values in CCDC */
ret = vpfe_config_ccdc_image_format(vpfe_dev);
if (ret)
return ret;
/* Update the values of sizeimage and bytesperline */
if (!ret) {
pix->bytesperline = ccdc_dev->hw_ops.get_line_length();
pix->sizeimage = pix->bytesperline * pix->height;
}
return ret;
}
static int vpfe_initialize_device(struct vpfe_device *vpfe_dev)
{
int ret = 0;
/* set first input of current subdevice as the current input */
vpfe_dev->current_input = 0;
/* set default standard */
vpfe_dev->std_index = 0;
/* Configure the default format information */
ret = vpfe_config_image_format(vpfe_dev,
&vpfe_standards[vpfe_dev->std_index].std_id);
if (ret)
return ret;
/* now open the ccdc device to initialize it */
mutex_lock(&ccdc_lock);
if (NULL == ccdc_dev) {
v4l2_err(&vpfe_dev->v4l2_dev, "ccdc device not registered\n");
ret = -ENODEV;
goto unlock;
}
if (!try_module_get(ccdc_dev->owner)) {
v4l2_err(&vpfe_dev->v4l2_dev, "Couldn't lock ccdc module\n");
ret = -ENODEV;
goto unlock;
}
ret = ccdc_dev->hw_ops.open(vpfe_dev->pdev);
if (!ret)
vpfe_dev->initialized = 1;
/* Clear all VPFE/CCDC interrupts */
if (vpfe_dev->cfg->clr_intr)
vpfe_dev->cfg->clr_intr(-1);
unlock:
mutex_unlock(&ccdc_lock);
return ret;
}
/*
* vpfe_open : It creates object of file handle structure and
* stores it in private_data member of filepointer
*/
static int vpfe_open(struct file *file)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
struct vpfe_fh *fh;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_open\n");
if (!vpfe_dev->cfg->num_subdevs) {
v4l2_err(&vpfe_dev->v4l2_dev, "No decoder registered\n");
return -ENODEV;
}
/* Allocate memory for the file handle object */
fh = kmalloc(sizeof(struct vpfe_fh), GFP_KERNEL);
if (NULL == fh) {
v4l2_err(&vpfe_dev->v4l2_dev,
"unable to allocate memory for file handle object\n");
return -ENOMEM;
}
/* store pointer to fh in private_data member of file */
file->private_data = fh;
fh->vpfe_dev = vpfe_dev;
mutex_lock(&vpfe_dev->lock);
/* If decoder is not initialized. initialize it */
if (!vpfe_dev->initialized) {
if (vpfe_initialize_device(vpfe_dev)) {
mutex_unlock(&vpfe_dev->lock);
return -ENODEV;
}
}
/* Increment device usrs counter */
vpfe_dev->usrs++;
/* Set io_allowed member to false */
fh->io_allowed = 0;
/* Initialize priority of this instance to default priority */
fh->prio = V4L2_PRIORITY_UNSET;
v4l2_prio_open(&vpfe_dev->prio, &fh->prio);
mutex_unlock(&vpfe_dev->lock);
return 0;
}
static void vpfe_schedule_next_buffer(struct vpfe_device *vpfe_dev)
{
unsigned long addr;
vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
struct videobuf_buffer, queue);
list_del(&vpfe_dev->next_frm->queue);
vpfe_dev->next_frm->state = VIDEOBUF_ACTIVE;
addr = videobuf_to_dma_contig(vpfe_dev->next_frm);
ccdc_dev->hw_ops.setfbaddr(addr);
}
static void vpfe_schedule_bottom_field(struct vpfe_device *vpfe_dev)
{
unsigned long addr;
addr = videobuf_to_dma_contig(vpfe_dev->cur_frm);
addr += vpfe_dev->field_off;
ccdc_dev->hw_ops.setfbaddr(addr);
}
static void vpfe_process_buffer_complete(struct vpfe_device *vpfe_dev)
{
struct timeval timevalue;
do_gettimeofday(&timevalue);
vpfe_dev->cur_frm->ts = timevalue;
vpfe_dev->cur_frm->state = VIDEOBUF_DONE;
vpfe_dev->cur_frm->size = vpfe_dev->fmt.fmt.pix.sizeimage;
wake_up_interruptible(&vpfe_dev->cur_frm->done);
vpfe_dev->cur_frm = vpfe_dev->next_frm;
}
/* ISR for VINT0*/
static irqreturn_t vpfe_isr(int irq, void *dev_id)
{
struct vpfe_device *vpfe_dev = dev_id;
enum v4l2_field field;
int fid;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nStarting vpfe_isr...\n");
field = vpfe_dev->fmt.fmt.pix.field;
/* if streaming not started, don't do anything */
if (!vpfe_dev->started)
goto clear_intr;
/* only for 6446 this will be applicable */
if (NULL != ccdc_dev->hw_ops.reset)
ccdc_dev->hw_ops.reset();
if (field == V4L2_FIELD_NONE) {
/* handle progressive frame capture */
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
"frame format is progressive...\n");
if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
vpfe_process_buffer_complete(vpfe_dev);
goto clear_intr;
}
/* interlaced or TB capture check which field we are in hardware */
fid = ccdc_dev->hw_ops.getfid();
/* switch the software maintained field id */
vpfe_dev->field_id ^= 1;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "field id = %x:%x.\n",
fid, vpfe_dev->field_id);
if (fid == vpfe_dev->field_id) {
/* we are in-sync here,continue */
if (fid == 0) {
/*
* One frame is just being captured. If the next frame
* is available, release the current frame and move on
*/
if (vpfe_dev->cur_frm != vpfe_dev->next_frm)
vpfe_process_buffer_complete(vpfe_dev);
/*
* based on whether the two fields are stored
* interleavely or separately in memory, reconfigure
* the CCDC memory address
*/
if (field == V4L2_FIELD_SEQ_TB) {
vpfe_schedule_bottom_field(vpfe_dev);
}
goto clear_intr;
}
/*
* if one field is just being captured configure
* the next frame get the next frame from the empty
* queue if no frame is available hold on to the
* current buffer
*/
spin_lock(&vpfe_dev->dma_queue_lock);
if (!list_empty(&vpfe_dev->dma_queue) &&
vpfe_dev->cur_frm == vpfe_dev->next_frm)
vpfe_schedule_next_buffer(vpfe_dev);
spin_unlock(&vpfe_dev->dma_queue_lock);
} else if (fid == 0) {
/*
* out of sync. Recover from any hardware out-of-sync.
* May loose one frame
*/
vpfe_dev->field_id = fid;
}
clear_intr:
if (vpfe_dev->cfg->clr_intr)
vpfe_dev->cfg->clr_intr(irq);
return IRQ_HANDLED;
}
/* vdint1_isr - isr handler for VINT1 interrupt */
static irqreturn_t vdint1_isr(int irq, void *dev_id)
{
struct vpfe_device *vpfe_dev = dev_id;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nInside vdint1_isr...\n");
/* if streaming not started, don't do anything */
if (!vpfe_dev->started) {
if (vpfe_dev->cfg->clr_intr)
vpfe_dev->cfg->clr_intr(irq);
return IRQ_HANDLED;
}
spin_lock(&vpfe_dev->dma_queue_lock);
if ((vpfe_dev->fmt.fmt.pix.field == V4L2_FIELD_NONE) &&
!list_empty(&vpfe_dev->dma_queue) &&
vpfe_dev->cur_frm == vpfe_dev->next_frm)
vpfe_schedule_next_buffer(vpfe_dev);
spin_unlock(&vpfe_dev->dma_queue_lock);
if (vpfe_dev->cfg->clr_intr)
vpfe_dev->cfg->clr_intr(irq);
return IRQ_HANDLED;
}
static void vpfe_detach_irq(struct vpfe_device *vpfe_dev)
{
enum ccdc_frmfmt frame_format;
frame_format = ccdc_dev->hw_ops.get_frame_format();
if (frame_format == CCDC_FRMFMT_PROGRESSIVE)
free_irq(vpfe_dev->ccdc_irq1, vpfe_dev);
}
static int vpfe_attach_irq(struct vpfe_device *vpfe_dev)
{
enum ccdc_frmfmt frame_format;
frame_format = ccdc_dev->hw_ops.get_frame_format();
if (frame_format == CCDC_FRMFMT_PROGRESSIVE) {
return request_irq(vpfe_dev->ccdc_irq1, vdint1_isr,
IRQF_DISABLED, "vpfe_capture1",
vpfe_dev);
}
return 0;
}
/* vpfe_stop_ccdc_capture: stop streaming in ccdc/isif */
static void vpfe_stop_ccdc_capture(struct vpfe_device *vpfe_dev)
{
vpfe_dev->started = 0;
ccdc_dev->hw_ops.enable(0);
if (ccdc_dev->hw_ops.enable_out_to_sdram)
ccdc_dev->hw_ops.enable_out_to_sdram(0);
}
/*
* vpfe_release : This function deletes buffer queue, frees the
* buffers and the vpfe file handle
*/
static int vpfe_release(struct file *file)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
struct vpfe_fh *fh = file->private_data;
struct vpfe_subdev_info *sdinfo;
int ret;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_release\n");
/* Get the device lock */
mutex_lock(&vpfe_dev->lock);
/* if this instance is doing IO */
if (fh->io_allowed) {
if (vpfe_dev->started) {
sdinfo = vpfe_dev->current_subdev;
ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev,
sdinfo->grp_id,
video, s_stream, 0);
if (ret && (ret != -ENOIOCTLCMD))
v4l2_err(&vpfe_dev->v4l2_dev,
"stream off failed in subdev\n");
vpfe_stop_ccdc_capture(vpfe_dev);
vpfe_detach_irq(vpfe_dev);
videobuf_streamoff(&vpfe_dev->buffer_queue);
}
vpfe_dev->io_usrs = 0;
vpfe_dev->numbuffers = config_params.numbuffers;
}
/* Decrement device usrs counter */
vpfe_dev->usrs--;
/* Close the priority */
v4l2_prio_close(&vpfe_dev->prio, fh->prio);
/* If this is the last file handle */
if (!vpfe_dev->usrs) {
vpfe_dev->initialized = 0;
if (ccdc_dev->hw_ops.close)
ccdc_dev->hw_ops.close(vpfe_dev->pdev);
module_put(ccdc_dev->owner);
}
mutex_unlock(&vpfe_dev->lock);
file->private_data = NULL;
/* Free memory allocated to file handle object */
kfree(fh);
return 0;
}
/*
* vpfe_mmap : It is used to map kernel space buffers
* into user spaces
*/
static int vpfe_mmap(struct file *file, struct vm_area_struct *vma)
{
/* Get the device object and file handle object */
struct vpfe_device *vpfe_dev = video_drvdata(file);
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_mmap\n");
return videobuf_mmap_mapper(&vpfe_dev->buffer_queue, vma);
}
/*
* vpfe_poll: It is used for select/poll system call
*/
static unsigned int vpfe_poll(struct file *file, poll_table *wait)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_poll\n");
if (vpfe_dev->started)
return videobuf_poll_stream(file,
&vpfe_dev->buffer_queue, wait);
return 0;
}
/* vpfe capture driver file operations */
static const struct v4l2_file_operations vpfe_fops = {
.owner = THIS_MODULE,
.open = vpfe_open,
.release = vpfe_release,
.unlocked_ioctl = video_ioctl2,
.mmap = vpfe_mmap,
.poll = vpfe_poll
};
/*
* vpfe_check_format()
* This function adjust the input pixel format as per hardware
* capabilities and update the same in pixfmt.
* Following algorithm used :-
*
* If given pixformat is not in the vpfe list of pix formats or not
* supported by the hardware, current value of pixformat in the device
* is used
* If given field is not supported, then current field is used. If field
* is different from current, then it is matched with that from sub device.
* Minimum height is 2 lines for interlaced or tb field and 1 line for
* progressive. Maximum height is clamped to active active lines of scan
* Minimum width is 32 bytes in memory and width is clamped to active
* pixels of scan.
* bytesperline is a multiple of 32.
*/
static const struct vpfe_pixel_format *
vpfe_check_format(struct vpfe_device *vpfe_dev,
struct v4l2_pix_format *pixfmt)
{
u32 min_height = 1, min_width = 32, max_width, max_height;
const struct vpfe_pixel_format *vpfe_pix_fmt;
u32 pix;
int temp, found;
vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
if (NULL == vpfe_pix_fmt) {
/*
* use current pixel format in the vpfe device. We
* will find this pix format in the table
*/
pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
}
/* check if hw supports it */
temp = 0;
found = 0;
while (ccdc_dev->hw_ops.enum_pix(&pix, temp) >= 0) {
if (vpfe_pix_fmt->fmtdesc.pixelformat == pix) {
found = 1;
break;
}
temp++;
}
if (!found) {
/* use current pixel format */
pixfmt->pixelformat = vpfe_dev->fmt.fmt.pix.pixelformat;
/*
* Since this is currently used in the vpfe device, we
* will find this pix format in the table
*/
vpfe_pix_fmt = vpfe_lookup_pix_format(pixfmt->pixelformat);
}
/* check what field format is supported */
if (pixfmt->field == V4L2_FIELD_ANY) {
/* if field is any, use current value as default */
pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
}
/*
* if field is not same as current field in the vpfe device
* try matching the field with the sub device field
*/
if (vpfe_dev->fmt.fmt.pix.field != pixfmt->field) {
/*
* If field value is not in the supported fields, use current
* field used in the device as default
*/
switch (pixfmt->field) {
case V4L2_FIELD_INTERLACED:
case V4L2_FIELD_SEQ_TB:
/* if sub device is supporting progressive, use that */
if (!vpfe_dev->std_info.frame_format)
pixfmt->field = V4L2_FIELD_NONE;
break;
case V4L2_FIELD_NONE:
if (vpfe_dev->std_info.frame_format)
pixfmt->field = V4L2_FIELD_INTERLACED;
break;
default:
/* use current field as default */
pixfmt->field = vpfe_dev->fmt.fmt.pix.field;
break;
}
}
/* Now adjust image resolutions supported */
if (pixfmt->field == V4L2_FIELD_INTERLACED ||
pixfmt->field == V4L2_FIELD_SEQ_TB)
min_height = 2;
max_width = vpfe_dev->std_info.active_pixels;
max_height = vpfe_dev->std_info.active_lines;
min_width /= vpfe_pix_fmt->bpp;
v4l2_info(&vpfe_dev->v4l2_dev, "width = %d, height = %d, bpp = %d\n",
pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp);
pixfmt->width = clamp((pixfmt->width), min_width, max_width);
pixfmt->height = clamp((pixfmt->height), min_height, max_height);
/* If interlaced, adjust height to be a multiple of 2 */
if (pixfmt->field == V4L2_FIELD_INTERLACED)
pixfmt->height &= (~1);
/*
* recalculate bytesperline and sizeimage since width
* and height might have changed
*/
pixfmt->bytesperline = (((pixfmt->width * vpfe_pix_fmt->bpp) + 31)
& ~31);
if (pixfmt->pixelformat == V4L2_PIX_FMT_NV12)
pixfmt->sizeimage =
pixfmt->bytesperline * pixfmt->height +
((pixfmt->bytesperline * pixfmt->height) >> 1);
else
pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
v4l2_info(&vpfe_dev->v4l2_dev, "adjusted width = %d, height ="
" %d, bpp = %d, bytesperline = %d, sizeimage = %d\n",
pixfmt->width, pixfmt->height, vpfe_pix_fmt->bpp,
pixfmt->bytesperline, pixfmt->sizeimage);
return vpfe_pix_fmt;
}
static int vpfe_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querycap\n");
cap->version = VPFE_CAPTURE_VERSION_CODE;
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver));
strlcpy(cap->bus_info, "VPFE", sizeof(cap->bus_info));
strlcpy(cap->card, vpfe_dev->cfg->card_name, sizeof(cap->card));
return 0;
}
static int vpfe_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *fmt)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
int ret = 0;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_fmt_vid_cap\n");
/* Fill in the information about format */
*fmt = vpfe_dev->fmt;
return ret;
}
static int vpfe_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *fmt)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
const struct vpfe_pixel_format *pix_fmt;
int temp_index;
u32 pix;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_fmt_vid_cap\n");
if (ccdc_dev->hw_ops.enum_pix(&pix, fmt->index) < 0)
return -EINVAL;
/* Fill in the information about format */
pix_fmt = vpfe_lookup_pix_format(pix);
if (NULL != pix_fmt) {
temp_index = fmt->index;
*fmt = pix_fmt->fmtdesc;
fmt->index = temp_index;
return 0;
}
return -EINVAL;
}
static int vpfe_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *fmt)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
const struct vpfe_pixel_format *pix_fmts;
int ret = 0;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_fmt_vid_cap\n");
/* If streaming is started, return error */
if (vpfe_dev->started) {
v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is started\n");
return -EBUSY;
}
/* Check for valid frame format */
pix_fmts = vpfe_check_format(vpfe_dev, &fmt->fmt.pix);
if (NULL == pix_fmts)
return -EINVAL;
/* store the pixel format in the device object */
ret = mutex_lock_interruptible(&vpfe_dev->lock);
if (ret)
return ret;
/* First detach any IRQ if currently attached */
vpfe_detach_irq(vpfe_dev);
vpfe_dev->fmt = *fmt;
/* set image capture parameters in the ccdc */
ret = vpfe_config_ccdc_image_format(vpfe_dev);
mutex_unlock(&vpfe_dev->lock);
return ret;
}
static int vpfe_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
const struct vpfe_pixel_format *pix_fmts;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_try_fmt_vid_cap\n");
pix_fmts = vpfe_check_format(vpfe_dev, &f->fmt.pix);
if (NULL == pix_fmts)
return -EINVAL;
return 0;
}
/*
* vpfe_get_subdev_input_index - Get subdev index and subdev input index for a
* given app input index
*/
static int vpfe_get_subdev_input_index(struct vpfe_device *vpfe_dev,
int *subdev_index,
int *subdev_input_index,
int app_input_index)
{
struct vpfe_config *cfg = vpfe_dev->cfg;
struct vpfe_subdev_info *sdinfo;
int i, j = 0;
for (i = 0; i < cfg->num_subdevs; i++) {
sdinfo = &cfg->sub_devs[i];
if (app_input_index < (j + sdinfo->num_inputs)) {
*subdev_index = i;
*subdev_input_index = app_input_index - j;
return 0;
}
j += sdinfo->num_inputs;
}
return -EINVAL;
}
/*
* vpfe_get_app_input - Get app input index for a given subdev input index
* driver stores the input index of the current sub device and translate it
* when application request the current input
*/
static int vpfe_get_app_input_index(struct vpfe_device *vpfe_dev,
int *app_input_index)
{
struct vpfe_config *cfg = vpfe_dev->cfg;
struct vpfe_subdev_info *sdinfo;
int i, j = 0;
for (i = 0; i < cfg->num_subdevs; i++) {
sdinfo = &cfg->sub_devs[i];
if (!strcmp(sdinfo->name, vpfe_dev->current_subdev->name)) {
if (vpfe_dev->current_input >= sdinfo->num_inputs)
return -1;
*app_input_index = j + vpfe_dev->current_input;
return 0;
}
j += sdinfo->num_inputs;
}
return -EINVAL;
}
static int vpfe_enum_input(struct file *file, void *priv,
struct v4l2_input *inp)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
struct vpfe_subdev_info *sdinfo;
int subdev, index ;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_input\n");
if (vpfe_get_subdev_input_index(vpfe_dev,
&subdev,
&index,
inp->index) < 0) {
v4l2_err(&vpfe_dev->v4l2_dev, "input information not found"
" for the subdev\n");
return -EINVAL;
}
sdinfo = &vpfe_dev->cfg->sub_devs[subdev];
memcpy(inp, &sdinfo->inputs[index], sizeof(struct v4l2_input));
return 0;
}
static int vpfe_g_input(struct file *file, void *priv, unsigned int *index)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_input\n");
return vpfe_get_app_input_index(vpfe_dev, index);
}
static int vpfe_s_input(struct file *file, void *priv, unsigned int index)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
struct vpfe_subdev_info *sdinfo;
int subdev_index, inp_index;
struct vpfe_route *route;
u32 input = 0, output = 0;
int ret = -EINVAL;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_input\n");
ret = mutex_lock_interruptible(&vpfe_dev->lock);
if (ret)
return ret;
/*
* If streaming is started return device busy
* error
*/
if (vpfe_dev->started) {
v4l2_err(&vpfe_dev->v4l2_dev, "Streaming is on\n");
ret = -EBUSY;
goto unlock_out;
}
if (vpfe_get_subdev_input_index(vpfe_dev,
&subdev_index,
&inp_index,
index) < 0) {
v4l2_err(&vpfe_dev->v4l2_dev, "invalid input index\n");
goto unlock_out;
}
sdinfo = &vpfe_dev->cfg->sub_devs[subdev_index];
route = &sdinfo->routes[inp_index];
if (route && sdinfo->can_route) {
input = route->input;
output = route->output;
}
ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
video, s_routing, input, output, 0);
if (ret) {
v4l2_err(&vpfe_dev->v4l2_dev,
"vpfe_doioctl:error in setting input in decoder\n");
ret = -EINVAL;
goto unlock_out;
}
vpfe_dev->current_subdev = sdinfo;
vpfe_dev->current_input = index;
vpfe_dev->std_index = 0;
/* set the bus/interface parameter for the sub device in ccdc */
ret = ccdc_dev->hw_ops.set_hw_if_params(&sdinfo->ccdc_if_params);
if (ret)
goto unlock_out;
/* set the default image parameters in the device */
ret = vpfe_config_image_format(vpfe_dev,
&vpfe_standards[vpfe_dev->std_index].std_id);
unlock_out:
mutex_unlock(&vpfe_dev->lock);
return ret;
}
static int vpfe_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
struct vpfe_subdev_info *sdinfo;
int ret = 0;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querystd\n");
ret = mutex_lock_interruptible(&vpfe_dev->lock);
sdinfo = vpfe_dev->current_subdev;
if (ret)
return ret;
/* Call querystd function of decoder device */
ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
video, querystd, std_id);
mutex_unlock(&vpfe_dev->lock);
return ret;
}
static int vpfe_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
struct vpfe_subdev_info *sdinfo;
int ret = 0;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_std\n");
/* Call decoder driver function to set the standard */
ret = mutex_lock_interruptible(&vpfe_dev->lock);
if (ret)
return ret;
sdinfo = vpfe_dev->current_subdev;
/* If streaming is started, return device busy error */
if (vpfe_dev->started) {
v4l2_err(&vpfe_dev->v4l2_dev, "streaming is started\n");
ret = -EBUSY;
goto unlock_out;
}
ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
core, s_std, *std_id);
if (ret < 0) {
v4l2_err(&vpfe_dev->v4l2_dev, "Failed to set standard\n");
goto unlock_out;
}
ret = vpfe_config_image_format(vpfe_dev, std_id);
unlock_out:
mutex_unlock(&vpfe_dev->lock);
return ret;
}
static int vpfe_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_std\n");
*std_id = vpfe_standards[vpfe_dev->std_index].std_id;
return 0;
}
/*
* Videobuf operations
*/
static int vpfe_videobuf_setup(struct videobuf_queue *vq,
unsigned int *count,
unsigned int *size)
{
struct vpfe_fh *fh = vq->priv_data;
struct vpfe_device *vpfe_dev = fh->vpfe_dev;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_setup\n");
*size = vpfe_dev->fmt.fmt.pix.sizeimage;
if (vpfe_dev->memory == V4L2_MEMORY_MMAP &&
vpfe_dev->fmt.fmt.pix.sizeimage > config_params.device_bufsize)
*size = config_params.device_bufsize;
if (*count < config_params.min_numbuffers)
*count = config_params.min_numbuffers;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
"count=%d, size=%d\n", *count, *size);
return 0;
}
static int vpfe_videobuf_prepare(struct videobuf_queue *vq,
struct videobuf_buffer *vb,
enum v4l2_field field)
{
struct vpfe_fh *fh = vq->priv_data;
struct vpfe_device *vpfe_dev = fh->vpfe_dev;
unsigned long addr;
int ret;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_prepare\n");
/* If buffer is not initialized, initialize it */
if (VIDEOBUF_NEEDS_INIT == vb->state) {
vb->width = vpfe_dev->fmt.fmt.pix.width;
vb->height = vpfe_dev->fmt.fmt.pix.height;
vb->size = vpfe_dev->fmt.fmt.pix.sizeimage;
vb->field = field;
ret = videobuf_iolock(vq, vb, NULL);;
if (ret < 0)
return ret;
addr = videobuf_to_dma_contig(vb);
/* Make sure user addresses are aligned to 32 bytes */
if (!ALIGN(addr, 32))
return -EINVAL;
vb->state = VIDEOBUF_PREPARED;
}
return 0;
}
static void vpfe_videobuf_queue(struct videobuf_queue *vq,
struct videobuf_buffer *vb)
{
/* Get the file handle object and device object */
struct vpfe_fh *fh = vq->priv_data;
struct vpfe_device *vpfe_dev = fh->vpfe_dev;
unsigned long flags;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_queue\n");
/* add the buffer to the DMA queue */
spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
list_add_tail(&vb->queue, &vpfe_dev->dma_queue);
spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
/* Change state of the buffer */
vb->state = VIDEOBUF_QUEUED;
}
static void vpfe_videobuf_release(struct videobuf_queue *vq,
struct videobuf_buffer *vb)
{
struct vpfe_fh *fh = vq->priv_data;
struct vpfe_device *vpfe_dev = fh->vpfe_dev;
unsigned long flags;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_videobuf_release\n");
/*
* We need to flush the buffer from the dma queue since
* they are de-allocated
*/
spin_lock_irqsave(&vpfe_dev->dma_queue_lock, flags);
INIT_LIST_HEAD(&vpfe_dev->dma_queue);
spin_unlock_irqrestore(&vpfe_dev->dma_queue_lock, flags);
videobuf_dma_contig_free(vq, vb);
vb->state = VIDEOBUF_NEEDS_INIT;
}
static struct videobuf_queue_ops vpfe_videobuf_qops = {
.buf_setup = vpfe_videobuf_setup,
.buf_prepare = vpfe_videobuf_prepare,
.buf_queue = vpfe_videobuf_queue,
.buf_release = vpfe_videobuf_release,
};
/*
* vpfe_reqbufs. currently support REQBUF only once opening
* the device.
*/
static int vpfe_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *req_buf)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
struct vpfe_fh *fh = file->private_data;
int ret = 0;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_reqbufs\n");
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != req_buf->type) {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buffer type\n");
return -EINVAL;
}
ret = mutex_lock_interruptible(&vpfe_dev->lock);
if (ret)
return ret;
if (vpfe_dev->io_usrs != 0) {
v4l2_err(&vpfe_dev->v4l2_dev, "Only one IO user allowed\n");
ret = -EBUSY;
goto unlock_out;
}
vpfe_dev->memory = req_buf->memory;
videobuf_queue_dma_contig_init(&vpfe_dev->buffer_queue,
&vpfe_videobuf_qops,
vpfe_dev->pdev,
&vpfe_dev->irqlock,
req_buf->type,
vpfe_dev->fmt.fmt.pix.field,
sizeof(struct videobuf_buffer),
fh, NULL);
fh->io_allowed = 1;
vpfe_dev->io_usrs = 1;
INIT_LIST_HEAD(&vpfe_dev->dma_queue);
ret = videobuf_reqbufs(&vpfe_dev->buffer_queue, req_buf);
unlock_out:
mutex_unlock(&vpfe_dev->lock);
return ret;
}
static int vpfe_querybuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_querybuf\n");
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
return -EINVAL;
}
if (vpfe_dev->memory != V4L2_MEMORY_MMAP) {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid memory\n");
return -EINVAL;
}
/* Call videobuf_querybuf to get information */
return videobuf_querybuf(&vpfe_dev->buffer_queue, buf);
}
static int vpfe_qbuf(struct file *file, void *priv,
struct v4l2_buffer *p)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
struct vpfe_fh *fh = file->private_data;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_qbuf\n");
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != p->type) {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
return -EINVAL;
}
/*
* If this file handle is not allowed to do IO,
* return error
*/
if (!fh->io_allowed) {
v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
return -EACCES;
}
return videobuf_qbuf(&vpfe_dev->buffer_queue, p);
}
static int vpfe_dqbuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_dqbuf\n");
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf->type) {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
return -EINVAL;
}
return videobuf_dqbuf(&vpfe_dev->buffer_queue,
buf, file->f_flags & O_NONBLOCK);
}
static int vpfe_queryctrl(struct file *file, void *priv,
struct v4l2_queryctrl *qctrl)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
struct vpfe_subdev_info *sdinfo;
sdinfo = vpfe_dev->current_subdev;
return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
core, queryctrl, qctrl);
}
static int vpfe_g_ctrl(struct file *file, void *priv, struct v4l2_control *ctrl)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
struct vpfe_subdev_info *sdinfo;
sdinfo = vpfe_dev->current_subdev;
return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
core, g_ctrl, ctrl);
}
static int vpfe_s_ctrl(struct file *file, void *priv, struct v4l2_control *ctrl)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
struct vpfe_subdev_info *sdinfo;
sdinfo = vpfe_dev->current_subdev;
return v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
core, s_ctrl, ctrl);
}
/*
* vpfe_calculate_offsets : This function calculates buffers offset
* for top and bottom field
*/
static void vpfe_calculate_offsets(struct vpfe_device *vpfe_dev)
{
struct v4l2_rect image_win;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_calculate_offsets\n");
ccdc_dev->hw_ops.get_image_window(&image_win);
vpfe_dev->field_off = image_win.height * image_win.width;
}
/* vpfe_start_ccdc_capture: start streaming in ccdc/isif */
static void vpfe_start_ccdc_capture(struct vpfe_device *vpfe_dev)
{
ccdc_dev->hw_ops.enable(1);
if (ccdc_dev->hw_ops.enable_out_to_sdram)
ccdc_dev->hw_ops.enable_out_to_sdram(1);
vpfe_dev->started = 1;
}
/*
* vpfe_streamon. Assume the DMA queue is not empty.
* application is expected to call QBUF before calling
* this ioctl. If not, driver returns error
*/
static int vpfe_streamon(struct file *file, void *priv,
enum v4l2_buf_type buf_type)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
struct vpfe_fh *fh = file->private_data;
struct vpfe_subdev_info *sdinfo;
unsigned long addr;
int ret = 0;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamon\n");
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
return -EINVAL;
}
/* If file handle is not allowed IO, return error */
if (!fh->io_allowed) {
v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
return -EACCES;
}
sdinfo = vpfe_dev->current_subdev;
ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
video, s_stream, 1);
if (ret && (ret != -ENOIOCTLCMD)) {
v4l2_err(&vpfe_dev->v4l2_dev, "stream on failed in subdev\n");
return -EINVAL;
}
/* If buffer queue is empty, return error */
if (list_empty(&vpfe_dev->buffer_queue.stream)) {
v4l2_err(&vpfe_dev->v4l2_dev, "buffer queue is empty\n");
return -EIO;
}
/* Call videobuf_streamon to start streaming * in videobuf */
ret = videobuf_streamon(&vpfe_dev->buffer_queue);
if (ret)
return ret;
ret = mutex_lock_interruptible(&vpfe_dev->lock);
if (ret)
goto streamoff;
/* Get the next frame from the buffer queue */
vpfe_dev->next_frm = list_entry(vpfe_dev->dma_queue.next,
struct videobuf_buffer, queue);
vpfe_dev->cur_frm = vpfe_dev->next_frm;
/* Remove buffer from the buffer queue */
list_del(&vpfe_dev->cur_frm->queue);
/* Mark state of the current frame to active */
vpfe_dev->cur_frm->state = VIDEOBUF_ACTIVE;
/* Initialize field_id and started member */
vpfe_dev->field_id = 0;
addr = videobuf_to_dma_contig(vpfe_dev->cur_frm);
/* Calculate field offset */
vpfe_calculate_offsets(vpfe_dev);
if (vpfe_attach_irq(vpfe_dev) < 0) {
v4l2_err(&vpfe_dev->v4l2_dev,
"Error in attaching interrupt handle\n");
ret = -EFAULT;
goto unlock_out;
}
if (ccdc_dev->hw_ops.configure() < 0) {
v4l2_err(&vpfe_dev->v4l2_dev,
"Error in configuring ccdc\n");
ret = -EINVAL;
goto unlock_out;
}
ccdc_dev->hw_ops.setfbaddr((unsigned long)(addr));
vpfe_start_ccdc_capture(vpfe_dev);
mutex_unlock(&vpfe_dev->lock);
return ret;
unlock_out:
mutex_unlock(&vpfe_dev->lock);
streamoff:
ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
return ret;
}
static int vpfe_streamoff(struct file *file, void *priv,
enum v4l2_buf_type buf_type)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
struct vpfe_fh *fh = file->private_data;
struct vpfe_subdev_info *sdinfo;
int ret = 0;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_streamoff\n");
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != buf_type) {
v4l2_err(&vpfe_dev->v4l2_dev, "Invalid buf type\n");
return -EINVAL;
}
/* If io is allowed for this file handle, return error */
if (!fh->io_allowed) {
v4l2_err(&vpfe_dev->v4l2_dev, "fh->io_allowed\n");
return -EACCES;
}
/* If streaming is not started, return error */
if (!vpfe_dev->started) {
v4l2_err(&vpfe_dev->v4l2_dev, "device started\n");
return -EINVAL;
}
ret = mutex_lock_interruptible(&vpfe_dev->lock);
if (ret)
return ret;
vpfe_stop_ccdc_capture(vpfe_dev);
vpfe_detach_irq(vpfe_dev);
sdinfo = vpfe_dev->current_subdev;
ret = v4l2_device_call_until_err(&vpfe_dev->v4l2_dev, sdinfo->grp_id,
video, s_stream, 0);
if (ret && (ret != -ENOIOCTLCMD))
v4l2_err(&vpfe_dev->v4l2_dev, "stream off failed in subdev\n");
ret = videobuf_streamoff(&vpfe_dev->buffer_queue);
mutex_unlock(&vpfe_dev->lock);
return ret;
}
static int vpfe_cropcap(struct file *file, void *priv,
struct v4l2_cropcap *crop)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_cropcap\n");
if (vpfe_dev->std_index >= ARRAY_SIZE(vpfe_standards))
return -EINVAL;
memset(crop, 0, sizeof(struct v4l2_cropcap));
crop->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
crop->bounds.width = crop->defrect.width =
vpfe_standards[vpfe_dev->std_index].width;
crop->bounds.height = crop->defrect.height =
vpfe_standards[vpfe_dev->std_index].height;
crop->pixelaspect = vpfe_standards[vpfe_dev->std_index].pixelaspect;
return 0;
}
static int vpfe_g_crop(struct file *file, void *priv,
struct v4l2_crop *crop)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_g_crop\n");
crop->c = vpfe_dev->crop;
return 0;
}
static int vpfe_s_crop(struct file *file, void *priv,
struct v4l2_crop *crop)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
int ret = 0;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_crop\n");
if (vpfe_dev->started) {
/* make sure streaming is not started */
v4l2_err(&vpfe_dev->v4l2_dev,
"Cannot change crop when streaming is ON\n");
return -EBUSY;
}
ret = mutex_lock_interruptible(&vpfe_dev->lock);
if (ret)
return ret;
if (crop->c.top < 0 || crop->c.left < 0) {
v4l2_err(&vpfe_dev->v4l2_dev,
"doesn't support negative values for top & left\n");
ret = -EINVAL;
goto unlock_out;
}
/* adjust the width to 16 pixel boundry */
crop->c.width = ((crop->c.width + 15) & ~0xf);
/* make sure parameters are valid */
if ((crop->c.left + crop->c.width >
vpfe_dev->std_info.active_pixels) ||
(crop->c.top + crop->c.height >
vpfe_dev->std_info.active_lines)) {
v4l2_err(&vpfe_dev->v4l2_dev, "Error in S_CROP params\n");
ret = -EINVAL;
goto unlock_out;
}
ccdc_dev->hw_ops.set_image_window(&crop->c);
vpfe_dev->fmt.fmt.pix.width = crop->c.width;
vpfe_dev->fmt.fmt.pix.height = crop->c.height;
vpfe_dev->fmt.fmt.pix.bytesperline =
ccdc_dev->hw_ops.get_line_length();
vpfe_dev->fmt.fmt.pix.sizeimage =
vpfe_dev->fmt.fmt.pix.bytesperline *
vpfe_dev->fmt.fmt.pix.height;
vpfe_dev->crop = crop->c;
unlock_out:
mutex_unlock(&vpfe_dev->lock);
return ret;
}
static long vpfe_param_handler(struct file *file, void *priv,
int cmd, void *param)
{
struct vpfe_device *vpfe_dev = video_drvdata(file);
int ret = 0;
v4l2_dbg(2, debug, &vpfe_dev->v4l2_dev, "vpfe_param_handler\n");
if (vpfe_dev->started) {
/* only allowed if streaming is not started */
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
"device already started\n");
return -EBUSY;
}
ret = mutex_lock_interruptible(&vpfe_dev->lock);
if (ret)
return ret;
switch (cmd) {
case VPFE_CMD_S_CCDC_RAW_PARAMS:
v4l2_warn(&vpfe_dev->v4l2_dev,
"VPFE_CMD_S_CCDC_RAW_PARAMS: experimental ioctl\n");
if (ccdc_dev->hw_ops.set_params) {
ret = ccdc_dev->hw_ops.set_params(param);
if (ret) {
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
"Error setting parameters in CCDC\n");
goto unlock_out;
}
if (vpfe_get_ccdc_image_format(vpfe_dev,
&vpfe_dev->fmt) < 0) {
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
"Invalid image format at CCDC\n");
goto unlock_out;
}
} else {
ret = -EINVAL;
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
"VPFE_CMD_S_CCDC_RAW_PARAMS not supported\n");
}
break;
default:
ret = -EINVAL;
}
unlock_out:
mutex_unlock(&vpfe_dev->lock);
return ret;
}
/* vpfe capture ioctl operations */
static const struct v4l2_ioctl_ops vpfe_ioctl_ops = {
.vidioc_querycap = vpfe_querycap,
.vidioc_g_fmt_vid_cap = vpfe_g_fmt_vid_cap,
.vidioc_enum_fmt_vid_cap = vpfe_enum_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = vpfe_s_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = vpfe_try_fmt_vid_cap,
.vidioc_enum_input = vpfe_enum_input,
.vidioc_g_input = vpfe_g_input,
.vidioc_s_input = vpfe_s_input,
.vidioc_querystd = vpfe_querystd,
.vidioc_s_std = vpfe_s_std,
.vidioc_g_std = vpfe_g_std,
.vidioc_queryctrl = vpfe_queryctrl,
.vidioc_g_ctrl = vpfe_g_ctrl,
.vidioc_s_ctrl = vpfe_s_ctrl,
.vidioc_reqbufs = vpfe_reqbufs,
.vidioc_querybuf = vpfe_querybuf,
.vidioc_qbuf = vpfe_qbuf,
.vidioc_dqbuf = vpfe_dqbuf,
.vidioc_streamon = vpfe_streamon,
.vidioc_streamoff = vpfe_streamoff,
.vidioc_cropcap = vpfe_cropcap,
.vidioc_g_crop = vpfe_g_crop,
.vidioc_s_crop = vpfe_s_crop,
.vidioc_default = vpfe_param_handler,
};
static struct vpfe_device *vpfe_initialize(void)
{
struct vpfe_device *vpfe_dev;
/* Default number of buffers should be 3 */
if ((numbuffers > 0) &&
(numbuffers < config_params.min_numbuffers))
numbuffers = config_params.min_numbuffers;
/*
* Set buffer size to min buffers size if invalid buffer size is
* given
*/
if (bufsize < config_params.min_bufsize)
bufsize = config_params.min_bufsize;
config_params.numbuffers = numbuffers;
if (numbuffers)
config_params.device_bufsize = bufsize;
/* Allocate memory for device objects */
vpfe_dev = kzalloc(sizeof(*vpfe_dev), GFP_KERNEL);
return vpfe_dev;
}
/*
* vpfe_probe : This function creates device entries by register
* itself to the V4L2 driver and initializes fields of each
* device objects
*/
static __init int vpfe_probe(struct platform_device *pdev)
{
struct vpfe_subdev_info *sdinfo;
struct vpfe_config *vpfe_cfg;
struct resource *res1;
struct vpfe_device *vpfe_dev;
struct i2c_adapter *i2c_adap;
struct video_device *vfd;
int ret = -ENOMEM, i, j;
int num_subdevs = 0;
/* Get the pointer to the device object */
vpfe_dev = vpfe_initialize();
if (!vpfe_dev) {
v4l2_err(pdev->dev.driver,
"Failed to allocate memory for vpfe_dev\n");
return ret;
}
vpfe_dev->pdev = &pdev->dev;
if (NULL == pdev->dev.platform_data) {
v4l2_err(pdev->dev.driver, "Unable to get vpfe config\n");
ret = -ENODEV;
goto probe_free_dev_mem;
}
vpfe_cfg = pdev->dev.platform_data;
vpfe_dev->cfg = vpfe_cfg;
if (NULL == vpfe_cfg->ccdc ||
NULL == vpfe_cfg->card_name ||
NULL == vpfe_cfg->sub_devs) {
v4l2_err(pdev->dev.driver, "null ptr in vpfe_cfg\n");
ret = -ENOENT;
goto probe_free_dev_mem;
}
/* Allocate memory for ccdc configuration */
ccdc_cfg = kmalloc(sizeof(struct ccdc_config), GFP_KERNEL);
if (NULL == ccdc_cfg) {
v4l2_err(pdev->dev.driver,
"Memory allocation failed for ccdc_cfg\n");
goto probe_free_lock;
}
mutex_lock(&ccdc_lock);
strncpy(ccdc_cfg->name, vpfe_cfg->ccdc, 32);
/* Get VINT0 irq resource */
res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res1) {
v4l2_err(pdev->dev.driver,
"Unable to get interrupt for VINT0\n");
ret = -ENODEV;
goto probe_free_ccdc_cfg_mem;
}
vpfe_dev->ccdc_irq0 = res1->start;
/* Get VINT1 irq resource */
res1 = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
if (!res1) {
v4l2_err(pdev->dev.driver,
"Unable to get interrupt for VINT1\n");
ret = -ENODEV;
goto probe_free_ccdc_cfg_mem;
}
vpfe_dev->ccdc_irq1 = res1->start;
ret = request_irq(vpfe_dev->ccdc_irq0, vpfe_isr, IRQF_DISABLED,
"vpfe_capture0", vpfe_dev);
if (0 != ret) {
v4l2_err(pdev->dev.driver, "Unable to request interrupt\n");
goto probe_free_ccdc_cfg_mem;
}
/* Allocate memory for video device */
vfd = video_device_alloc();
if (NULL == vfd) {
ret = -ENOMEM;
v4l2_err(pdev->dev.driver, "Unable to alloc video device\n");
goto probe_out_release_irq;
}
/* Initialize field of video device */
vfd->release = video_device_release;
vfd->fops = &vpfe_fops;
vfd->ioctl_ops = &vpfe_ioctl_ops;
vfd->tvnorms = 0;
vfd->current_norm = V4L2_STD_PAL;
vfd->v4l2_dev = &vpfe_dev->v4l2_dev;
snprintf(vfd->name, sizeof(vfd->name),
"%s_V%d.%d.%d",
CAPTURE_DRV_NAME,
(VPFE_CAPTURE_VERSION_CODE >> 16) & 0xff,
(VPFE_CAPTURE_VERSION_CODE >> 8) & 0xff,
(VPFE_CAPTURE_VERSION_CODE) & 0xff);
/* Set video_dev to the video device */
vpfe_dev->video_dev = vfd;
ret = v4l2_device_register(&pdev->dev, &vpfe_dev->v4l2_dev);
if (ret) {
v4l2_err(pdev->dev.driver,
"Unable to register v4l2 device.\n");
goto probe_out_video_release;
}
v4l2_info(&vpfe_dev->v4l2_dev, "v4l2 device registered\n");
spin_lock_init(&vpfe_dev->irqlock);
spin_lock_init(&vpfe_dev->dma_queue_lock);
mutex_init(&vpfe_dev->lock);
/* Initialize field of the device objects */
vpfe_dev->numbuffers = config_params.numbuffers;
/* Initialize prio member of device object */
v4l2_prio_init(&vpfe_dev->prio);
/* register video device */
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
"trying to register vpfe device.\n");
v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev,
"video_dev=%x\n", (int)&vpfe_dev->video_dev);
vpfe_dev->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ret = video_register_device(vpfe_dev->video_dev,
VFL_TYPE_GRABBER, -1);
if (ret) {
v4l2_err(pdev->dev.driver,
"Unable to register video device.\n");
goto probe_out_v4l2_unregister;
}
v4l2_info(&vpfe_dev->v4l2_dev, "video device registered\n");
/* set the driver data in platform device */
platform_set_drvdata(pdev, vpfe_dev);
/* set driver private data */
video_set_drvdata(vpfe_dev->video_dev, vpfe_dev);
i2c_adap = i2c_get_adapter(vpfe_cfg->i2c_adapter_id);
num_subdevs = vpfe_cfg->num_subdevs;
vpfe_dev->sd = kmalloc(sizeof(struct v4l2_subdev *) * num_subdevs,
GFP_KERNEL);
if (NULL == vpfe_dev->sd) {
v4l2_err(&vpfe_dev->v4l2_dev,
"unable to allocate memory for subdevice pointers\n");
ret = -ENOMEM;
goto probe_out_video_unregister;
}
for (i = 0; i < num_subdevs; i++) {
struct v4l2_input *inps;
sdinfo = &vpfe_cfg->sub_devs[i];
/* Load up the subdevice */
vpfe_dev->sd[i] =
v4l2_i2c_new_subdev_board(&vpfe_dev->v4l2_dev,
i2c_adap,
&sdinfo->board_info,
NULL);
if (vpfe_dev->sd[i]) {
v4l2_info(&vpfe_dev->v4l2_dev,
"v4l2 sub device %s registered\n",
sdinfo->name);
vpfe_dev->sd[i]->grp_id = sdinfo->grp_id;
/* update tvnorms from the sub devices */
for (j = 0; j < sdinfo->num_inputs; j++) {
inps = &sdinfo->inputs[j];
vfd->tvnorms |= inps->std;
}
} else {
v4l2_info(&vpfe_dev->v4l2_dev,
"v4l2 sub device %s register fails\n",
sdinfo->name);
goto probe_sd_out;
}
}
/* set first sub device as current one */
vpfe_dev->current_subdev = &vpfe_cfg->sub_devs[0];
/* We have at least one sub device to work with */
mutex_unlock(&ccdc_lock);
return 0;
probe_sd_out:
kfree(vpfe_dev->sd);
probe_out_video_unregister:
video_unregister_device(vpfe_dev->video_dev);
probe_out_v4l2_unregister:
v4l2_device_unregister(&vpfe_dev->v4l2_dev);
probe_out_video_release:
if (!video_is_registered(vpfe_dev->video_dev))
video_device_release(vpfe_dev->video_dev);
probe_out_release_irq:
free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
probe_free_ccdc_cfg_mem:
kfree(ccdc_cfg);
probe_free_lock:
mutex_unlock(&ccdc_lock);
probe_free_dev_mem:
kfree(vpfe_dev);
return ret;
}
/*
* vpfe_remove : It un-register device from V4L2 driver
*/
static int __devexit vpfe_remove(struct platform_device *pdev)
{
struct vpfe_device *vpfe_dev = platform_get_drvdata(pdev);
v4l2_info(pdev->dev.driver, "vpfe_remove\n");
free_irq(vpfe_dev->ccdc_irq0, vpfe_dev);
kfree(vpfe_dev->sd);
v4l2_device_unregister(&vpfe_dev->v4l2_dev);
video_unregister_device(vpfe_dev->video_dev);
kfree(vpfe_dev);
kfree(ccdc_cfg);
return 0;
}
static int vpfe_suspend(struct device *dev)
{
return 0;
}
static int vpfe_resume(struct device *dev)
{
return 0;
}
static const struct dev_pm_ops vpfe_dev_pm_ops = {
.suspend = vpfe_suspend,
.resume = vpfe_resume,
};
static struct platform_driver vpfe_driver = {
.driver = {
.name = CAPTURE_DRV_NAME,
.owner = THIS_MODULE,
.pm = &vpfe_dev_pm_ops,
},
.probe = vpfe_probe,
.remove = __devexit_p(vpfe_remove),
};
static __init int vpfe_init(void)
{
printk(KERN_NOTICE "vpfe_init\n");
/* Register driver to the kernel */
return platform_driver_register(&vpfe_driver);
}
/*
* vpfe_cleanup : This function un-registers device driver
*/
static void vpfe_cleanup(void)
{
platform_driver_unregister(&vpfe_driver);
}
module_init(vpfe_init);
module_exit(vpfe_cleanup);
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