os/linux-2.6-tag--devboard-R2_10-4/arch/cris/arch-v32/drivers/elphel/exif353.c File Reference

#include <linux/module.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/autoconf.h>
#include <linux/vmalloc.h>
#include <asm/system.h>
#include <asm/byteorder.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/delay.h>
#include <asm/uaccess.h>
#include <asm/elphel/driver_numbers.h>
#include <asm/elphel/c313a.h>
#include <asm/elphel/exifa.h>
#include "fpgactrl.h"
#include "exif353.h"

Include dependency graph for exif353.c:

Go to the source code of this file.

Data Structures

struct  exif_time_t
struct  exif_datetime_t

Defines

#define D(x)
#define X3X3_EXIF_DRIVER_NAME   "Elphel (R) model 353 Exif device driver"

Functions

static int exif_open (struct inode *inode, struct file *filp)
 ++++++++++++++++++++++++++++++++++++ open() ++++++++++++++++++++++++++++++++++++++++++++++++++++++
static int exif_release (struct inode *inode, struct file *filp)
 ++++++++++++++++++++++++++++++++++++ release() ++++++++++++++++++++++++++++++++++++++++++++++++++++++
static loff_t exif_lseek (struct file *file, loff_t offset, int orig)
 ++++++++++++++++++++++++++++++++++++ lseek() ++++++++++++++++++++++++++++++++++++++++++++++++++++++
static ssize_t exif_write (struct file *file, const char *buf, size_t count, loff_t *off)
 ++++++++++++++++++++++++++++++++++++ write() ++++++++++++++++++++++++++++++++++++++++++++++++++++++
static ssize_t exif_read (struct file *file, char *buf, size_t count, loff_t *off)
 ++++++++++++++++++++++++++++++++++++ read() ++++++++++++++++++++++++++++++++++++++++++++++++++++++
static int __init exif_init (void)
 ++++++++++++++++++++++++++++++++++++ _init() ++++++++++++++++++++++++++++++++++++++++++++++++++++++
ssize_t minor_file_size (int minor)
ssize_t minor_max_size (int minor)
void exif_invalidate (void)
int exif_rebuild (int frames)
int exif_enable (int en)
int dir_find_tag (unsigned long tag)
void write_meta_raw_irq (char *data, int offset, int len)
 find location of the tag field in meta page using long tag (Exif tag and tag group)
int write_meta_irq (char *data, int *indx, unsigned long ltag, int len)
void putlong_meta_raw_irq (unsigned long data, int offset)
int putlong_meta_irq (unsigned long data, int *indx, unsigned long ltag)
void write_meta_raw (char *data, int offset, int len)
int write_meta (char *data, int *indx, unsigned long ltag, int len)
void putlong_meta_raw (unsigned long data, int offset)
int putlong_meta (unsigned long data, int *indx, unsigned long ltag)
char * encode_time (unsigned long sec, unsigned long usec)
int store_meta (void)
 module_init (exif_init)
 MODULE_LICENSE ("GPL")
 MODULE_AUTHOR ("Andrey Filippov <andrey@elphel.com>.")
 MODULE_DESCRIPTION (X3X3_EXIF_DRIVER_NAME)

Variables

static struct exif_dir_table_t dir_table [MAX_EXIF_FIELDS]
static int exif_fields = 0
static int exif_template_size = 0
static int exif_meta_size = 0
static int exif_wp = 1
static char exif_template [MAX_EXIF_SIZE]
static int exif_enabled = 0
static int exif_valid = 0
static char * meta_buffer = NULL
static struct exif_time_t exif_time
static struct exif_datetime_t now_datetime
static struct file_operations exif_fops

Define Documentation

#define D ( x   ) 

******************************************************************************** ! FILE NAME : exif353.c ! DESCRIPTION: Drivers for Exif manipulation ! Copyright (C) 2008 Elphel, 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 3 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, see <http://www.gnu.org/licenses/>. ! -----------------------------------------------------------------------------** !

Log
exif353.c,v
! Revision 1.1.1.1 2008/11/27 20:04:00 elphel ! ! ! Revision 1.3 2008/09/20 00:29:49 elphel ! moved driver major/minor numbers to a single file - include/asm-cris/elphel/driver_numbers.h ! ! Revision 1.2 2008/09/12 00:23:59 elphel ! removed cc353.c, cc353.h ! ! Revision 1.4 2008/04/25 21:28:56 elphel ! added more functions for access from the IRQ, changed them to inline ! ! Revision 1.3 2008/04/11 23:16:51 elphel ! removed unneeded local_irq_disable() after local_irq_save_flags() ! ! Revision 1.2 2008/04/07 09:45:30 elphel ! removed unused variable ! ! Revision 1.1 2008/04/07 09:09:07 elphel ! New driver to handle Exif ! !

Definition at line 81 of file exif353.c.

#define X3X3_EXIF_DRIVER_NAME   "Elphel (R) model 353 Exif device driver"

Definition at line 99 of file exif353.c.

Referenced by exif_init().

Function Documentation

int dir_find_tag ( unsigned long  tag  ) 

Definition at line 213 of file exif353.c.

References dir_table, exif_fields, and src.

Referenced by exif_lseek().

char* encode_time ( unsigned long  sec,
unsigned long  usec 
)

Definition at line 337 of file exif353.c.

References d, D, exif_datetime_t::datetime, exif_time, memcpy(), now_datetime, printk, s, exif_datetime_t::subsec, exif_time_t::today_date, exif_time_t::today_sec, and exif_time_t::tomorrow_date.

Referenced by updateIRQ_Exif().

int exif_enable ( int  en  ) 

Definition at line 201 of file exif353.c.

References exif_enabled, exif_rebuild(), exif_valid, and MAX_EXIF_FRAMES.

Referenced by exif_lseek(), and listener_loop().

static int __init exif_init ( void   )  [static]

++++++++++++++++++++++++++++++++++++ _init() ++++++++++++++++++++++++++++++++++++++++++++++++++++++

Definition at line 664 of file exif353.c.

References exif_fops, KERN_ERR, printk, X3X3_EXIF_DRIVER_NAME, and X3X3_EXIF_MAJOR.

void exif_invalidate ( void   ) 

Definition at line 165 of file exif353.c.

References exif_enabled, and exif_valid.

Referenced by exif_lseek(), and exif_write().

static loff_t exif_lseek ( struct file *  file,
loff_t  offset,
int  orig 
) [static]

++++++++++++++++++++++++++++++++++++ lseek() ++++++++++++++++++++++++++++++++++++++++++++++++++++++

overload

Definition at line 455 of file exif353.c.

References dir_find_tag(), exif_enable(), exif_invalidate(), EXIF_LSEEK_DISABLE, EXIF_LSEEK_INVALIDATE, EXIF_LSEEK_REBUILD, EXIF_LSEEK_TODAY_DATE, EXIF_LSEEK_TODAY_SEC, EXIF_LSEEK_TOMORROW_DATE, EXIF_LSEEK_TOMORROW_SEC, exif_rebuild(), exif_template_size, exif_time, fp, int, MAX_EXIF_FRAMES, minor_file_size(), minor_max_size(), SEEK_CUR, SEEK_END, SEEK_SET, exif_time_t::today_date, exif_time_t::today_sec, exif_time_t::tomorrow_date, exif_time_t::tomorrow_sec, X3X3_EXIF_EXIF, X3X3_EXIF_META, X3X3_EXIF_METADIR, X3X3_EXIF_TEMPLATE, and X3X3_EXIF_TIME.

static int exif_open ( struct inode *  inode,
struct file *  filp 
) [static]

++++++++++++++++++++++++++++++++++++ open() ++++++++++++++++++++++++++++++++++++++++++++++++++++++

Definition at line 409 of file exif353.c.

References D, minor_file_size(), pd, printk, X3X3_EXIF_EXIF, X3X3_EXIF_META, X3X3_EXIF_METADIR, X3X3_EXIF_TEMPLATE, and X3X3_EXIF_TIME.

static ssize_t exif_read ( struct file *  file,
char *  buf,
size_t  count,
loff_t *  off 
) [static]

++++++++++++++++++++++++++++++++++++ read() ++++++++++++++++++++++++++++++++++++++++++++++++++++++

Or is it possible to disable IRQ while copy_from_user()?

Definition at line 596 of file exif353.c.

References D, dir_table, dst, exif_enabled, exif_fields, exif_meta_size, exif_template, exif_template_size, exif_time, int, exif_dir_table_t::len, MAX_EXIF_SIZE, memcpy(), meta_buffer, minor_file_size(), printk, src, X3X3_EXIF_EXIF, X3X3_EXIF_META, X3X3_EXIF_METADIR, X3X3_EXIF_TEMPLATE, and X3X3_EXIF_TIME.

int exif_rebuild ( int  frames  ) 

Definition at line 171 of file exif353.c.

References dir_table, exif_enabled, exif_fields, exif_meta_size, exif_valid, exif_wp, MAX_EXIF_FRAMES, MAX_EXIF_SIZE, memset(), meta_buffer, printk, and src.

Referenced by exif_enable(), and exif_lseek().

static int exif_release ( struct inode *  inode,
struct file *  filp 
) [static]

++++++++++++++++++++++++++++++++++++ release() ++++++++++++++++++++++++++++++++++++++++++++++++++++++

Definition at line 430 of file exif353.c.

References D, minor_file_size(), pd, printk, X3X3_EXIF_EXIF, X3X3_EXIF_META, X3X3_EXIF_METADIR, X3X3_EXIF_TEMPLATE, and X3X3_EXIF_TIME.

static ssize_t exif_write ( struct file *  file,
const char *  buf,
size_t  count,
loff_t *  off 
) [static]

++++++++++++++++++++++++++++++++++++ write() ++++++++++++++++++++++++++++++++++++++++++++++++++++++

Or is it possible to disable IRQ while copy_from_user()?

Definition at line 544 of file exif353.c.

References D, dir_table, exif_enabled, exif_fields, exif_invalidate(), exif_template, exif_template_size, exif_time, flags, int, local_irq_restore, local_irq_save, MAX_EXIF_SIZE, memcpy(), meta_buffer, minor_max_size(), printk, X3X3_EXIF_EXIF, X3X3_EXIF_META, X3X3_EXIF_METADIR, X3X3_EXIF_TEMPLATE, and X3X3_EXIF_TIME.

ssize_t minor_file_size ( int  minor  ) 

Definition at line 145 of file exif353.c.

References exif_enabled, exif_fields, exif_meta_size, exif_template_size, MAX_EXIF_FRAMES, X3X3_EXIF_EXIF, X3X3_EXIF_META, X3X3_EXIF_METADIR, X3X3_EXIF_TEMPLATE, and X3X3_EXIF_TIME.

Referenced by exif_lseek(), exif_open(), exif_read(), and exif_release().

ssize_t minor_max_size ( int  minor  ) 

Definition at line 155 of file exif353.c.

References MAX_EXIF_FIELDS, MAX_EXIF_FRAMES, MAX_EXIF_SIZE, X3X3_EXIF_EXIF, X3X3_EXIF_META, X3X3_EXIF_METADIR, X3X3_EXIF_TEMPLATE, and X3X3_EXIF_TIME.

Referenced by exif_lseek(), and exif_write().

MODULE_AUTHOR ( "Andrey Filippov <andrey@elphel.com>."   ) 

MODULE_DESCRIPTION ( X3X3_EXIF_DRIVER_NAME   ) 

module_init ( exif_init   ) 

MODULE_LICENSE ( "GPL"   ) 

int putlong_meta ( unsigned long  data,
int *  indx,
unsigned long  ltag 
)

Definition at line 299 of file exif353.c.

References dir_table, exif_enabled, exif_fields, flags, local_irq_restore, local_irq_save, memcpy(), meta_buffer, src, and exif_dir_table_t::src.

int putlong_meta_irq ( unsigned long  data,
int *  indx,
unsigned long  ltag 
) [inline]

Definition at line 245 of file exif353.c.

References dir_table, exif_enabled, exif_fields, memcpy(), meta_buffer, src, and exif_dir_table_t::src.

Referenced by updateIRQ_Exif().

void putlong_meta_raw ( unsigned long  data,
int  offset 
)

Definition at line 288 of file exif353.c.

References exif_enabled, flags, local_irq_restore, local_irq_save, memcpy(), and meta_buffer.

void putlong_meta_raw_irq ( unsigned long  data,
int  offset 
) [inline]

Definition at line 238 of file exif353.c.

References exif_enabled, memcpy(), and meta_buffer.

int store_meta ( void   ) 

Definition at line 398 of file exif353.c.

References exif_enabled, exif_meta_size, exif_wp, MAX_EXIF_FRAMES, memcpy(), and meta_buffer.

Referenced by updateIRQ_Exif().

int write_meta ( char *  data,
int *  indx,
unsigned long  ltag,
int  len 
)

Definition at line 270 of file exif353.c.

References dir_table, exif_enabled, exif_fields, flags, local_irq_restore, local_irq_save, memcpy(), meta_buffer, src, and exif_dir_table_t::src.

int write_meta_irq ( char *  data,
int *  indx,
unsigned long  ltag,
int  len 
) [inline]

Definition at line 224 of file exif353.c.

References dir_table, exif_enabled, exif_fields, memcpy(), meta_buffer, src, and exif_dir_table_t::src.

Referenced by updateIRQ_Exif().

void write_meta_raw ( char *  data,
int  offset,
int  len 
)

Definition at line 261 of file exif353.c.

References exif_enabled, flags, local_irq_restore, local_irq_save, memcpy(), and meta_buffer.

void write_meta_raw_irq ( char *  data,
int  offset,
int  len 
) [inline]

find location of the tag field in meta page using long tag (Exif tag and tag group)

Definition at line 220 of file exif353.c.

References exif_enabled, memcpy(), and meta_buffer.

Variable Documentation

struct exif_dir_table_t dir_table[MAX_EXIF_FIELDS] [static]

Definition at line 104 of file exif353.c.

Referenced by dir_find_tag(), exif_read(), exif_rebuild(), exif_write(), putlong_meta(), putlong_meta_irq(), write_meta(), and write_meta_irq().

int exif_enabled = 0 [static]

Definition at line 111 of file exif353.c.

Referenced by exif_enable(), exif_invalidate(), exif_read(), exif_rebuild(), exif_write(), minor_file_size(), putlong_meta(), putlong_meta_irq(), putlong_meta_raw(), putlong_meta_raw_irq(), store_meta(), write_meta(), write_meta_irq(), write_meta_raw(), and write_meta_raw_irq().

int exif_fields = 0 [static]

Definition at line 105 of file exif353.c.

Referenced by dir_find_tag(), exif_read(), exif_rebuild(), exif_write(), minor_file_size(), putlong_meta(), putlong_meta_irq(), write_meta(), and write_meta_irq().

struct file_operations exif_fops [static]

Initial value:

 {
   owner:    THIS_MODULE,
   open:     exif_open,
   release:  exif_release,
   read:     exif_read,
   write:    exif_write,
   llseek:   exif_lseek
}

Definition at line 137 of file exif353.c.

Referenced by exif_init().

int exif_meta_size = 0 [static]

Definition at line 107 of file exif353.c.

Referenced by exif_read(), exif_rebuild(), minor_file_size(), and store_meta().

char exif_template[MAX_EXIF_SIZE] [static]

Definition at line 109 of file exif353.c.

Referenced by exif_read(), and exif_write().

int exif_template_size = 0 [static]

Definition at line 106 of file exif353.c.

Referenced by exif_lseek(), exif_read(), exif_write(), and minor_file_size().

struct exif_time_t exif_time [static]

Referenced by encode_time(), exif_lseek(), exif_read(), and exif_write().

int exif_valid = 0 [static]

Definition at line 112 of file exif353.c.

Referenced by exif_enable(), exif_invalidate(), and exif_rebuild().

int exif_wp = 1 [static]

Definition at line 108 of file exif353.c.

Referenced by exif_rebuild(), and store_meta().

char* meta_buffer = NULL [static]

Definition at line 114 of file exif353.c.

Referenced by exif_read(), exif_rebuild(), exif_write(), putlong_meta(), putlong_meta_irq(), putlong_meta_raw(), putlong_meta_raw_irq(), store_meta(), write_meta(), write_meta_irq(), write_meta_raw(), and write_meta_raw_irq().

struct exif_datetime_t now_datetime [static]

Referenced by encode_time().

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