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|
//==========================================================================
//
// synthdisk.c
//
// Disk device driver for the synthetic target
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
//
// eCos 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 or (at your option) any later
// version.
//
// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): savin
// Contributors:
// Date: 2003-06-18
//
//####DESCRIPTIONEND####
//
//==========================================================================
#include <pkgconf/devs_disk_ecosynth.h>
#include <cyg/infra/cyg_type.h>
#include <cyg/infra/cyg_ass.h>
#include <cyg/infra/diag.h>
#include <cyg/hal/hal_arch.h>
#include <cyg/hal/hal_io.h>
#include <cyg/hal/drv_api.h>
#include <cyg/io/io.h>
#include <cyg/io/devtab.h>
#include <cyg/io/disk.h>
#include <stdio.h> // sprintf
// ----------------------------------------------------------------------------
//#define DEBUG 1
// ----------------------------------------------------------------------------
typedef struct {
int num;
cyg_uint32 cylinders_num;
cyg_uint32 heads_num;
cyg_uint32 sectors_num;
cyg_uint32 size;
int filefd;
char *filename;
} synth_disk_info_t;
typedef struct { int dummy; } synth_controller_t;
// ----------------------------------------------------------------------------
static cyg_bool synth_disk_init(struct cyg_devtab_entry *tab);
static Cyg_ErrNo synth_disk_read(disk_channel *chan,
void *buf,
cyg_uint32 len,
cyg_uint32 block_num);
static Cyg_ErrNo synth_disk_write(disk_channel *chan,
const void *buf,
cyg_uint32 len,
cyg_uint32 block_num);
static Cyg_ErrNo synth_disk_get_config(disk_channel *chan,
cyg_uint32 key,
const void *xbuf,
cyg_uint32 *len);
static Cyg_ErrNo synth_disk_set_config(disk_channel *chan,
cyg_uint32 key,
const void *xbuf,
cyg_uint32 *len);
static Cyg_ErrNo synth_disk_lookup(struct cyg_devtab_entry **tab,
struct cyg_devtab_entry *sub_tab,
const char *name);
DISK_FUNS(synth_disk_funs,
synth_disk_read,
synth_disk_write,
synth_disk_get_config,
synth_disk_set_config
);
// ----------------------------------------------------------------------------
#define SYNTH_DISK_INSTANCE(_number_,_mbr_supp_, _cyl_,_hpt_,_spt_) \
static synth_disk_info_t synth_disk_info##_number_ = { \
num: _number_, \
cylinders_num: _cyl_, \
heads_num: _hpt_, \
sectors_num: _spt_, \
size: CYGNUM_IO_DISK_ECOSYNTH_DISK##_number_##_SIZE, \
filefd: -1, \
filename: CYGDAT_IO_DISK_ECOSYNTH_DISK##_number_##_FILENAME \
}; \
static synth_controller_t synth_controller_##_number_; \
DISK_CONTROLLER( synth_disk_controller_##_number_, synth_controller_##_number_ ); \
DISK_CHANNEL(synth_disk_channel##_number_, \
synth_disk_funs, \
synth_disk_info##_number_, \
synth_disk_controller_##_number_, \
_mbr_supp_, \
4 \
); \
BLOCK_DEVTAB_ENTRY(synth_disk_io##_number_, \
CYGDAT_IO_DISK_ECOSYNTH_DISK##_number_##_NAME, \
0, \
&cyg_io_disk_devio, \
synth_disk_init, \
synth_disk_lookup, \
&synth_disk_channel##_number_ \
);
// ----------------------------------------------------------------------------
#ifdef CYGVAR_DEVS_DISK_ECOSYNTH_DISK0
# ifndef CYGIMP_IO_DISK_ECOSYNTH_DISK0_MBR
SYNTH_DISK_INSTANCE(0, false, 0, 0, 0);
# else
SYNTH_DISK_INSTANCE(0, true, CYGIMP_IO_DISK_ECOSYNTH_DISK0_CYLINDERS,
CYGIMP_IO_DISK_ECOSYNTH_DISK0_HEADS,
CYGIMP_IO_DISK_ECOSYNTH_DISK0_SECTORS);
# endif
#endif
// ----------------------------------------------------------------------------
static cyg_bool
synth_disk_init(struct cyg_devtab_entry *tab)
{
disk_channel *chan = (disk_channel *) tab->priv;
synth_disk_info_t *synth_info = (synth_disk_info_t *) chan->dev_priv;
bool result = true;
if (chan->init)
return true;
#ifdef DEBUG
diag_printf("synth disk %d init size=%d\n",
synth_info->num, synth_info->size);
#endif
synth_info->filefd = cyg_hal_sys_open(synth_info->filename,
CYG_HAL_SYS_O_RDWR,
CYG_HAL_SYS_S_IRWXU|CYG_HAL_SYS_S_IRWXG|CYG_HAL_SYS_S_IRWXO);
if (-ENOENT == synth_info->filefd)
{
synth_info->filefd = cyg_hal_sys_open(synth_info->filename,
CYG_HAL_SYS_O_RDWR|CYG_HAL_SYS_O_CREAT, 0644);
if (synth_info->filefd >= 0)
{
unsigned char b = 0x00;
int i;
for (i = 0; i < synth_info->size; i++)
cyg_hal_sys_write(synth_info->filefd, &b, 1);
}
}
if (synth_info->filefd < 0)
{
CYG_ASSERT(false, "Can't open/create disk image file");
return false;
}
if (result)
{
if (!(chan->callbacks->disk_init)(tab))
return false;
}
return result;
}
// ----------------------------------------------------------------------------
static Cyg_ErrNo
synth_disk_lookup(struct cyg_devtab_entry **tab,
struct cyg_devtab_entry *sub_tab,
const char *name)
{
Cyg_ErrNo res;
disk_channel *chan = (disk_channel *) (*tab)->priv;
synth_disk_info_t *synth_info = (synth_disk_info_t *) chan->dev_priv;
cyg_disk_identify_t ident;
ident.serial[0] = '\0';
ident.firmware_rev[0] = '\0';
ident.model_num[0] = '\0';
ident.lba_sectors_num = synth_info->size / 512;
ident.cylinders_num = synth_info->cylinders_num;
ident.heads_num = synth_info->heads_num;
ident.sectors_num = synth_info->sectors_num;
ident.phys_block_size = 1;
ident.max_transfer = 2048;
res = (chan->callbacks->disk_connected)(*tab, &ident);
if( res == ENOERR )
res = (chan->callbacks->disk_lookup(tab, sub_tab, name));
return res;
}
// ----------------------------------------------------------------------------
static Cyg_ErrNo
synth_disk_read(disk_channel *chan,
void *buf,
cyg_uint32 len,
cyg_uint32 block_num)
{
synth_disk_info_t *synth_info = (synth_disk_info_t *)chan->dev_priv;
#ifdef DEBUG
diag_printf("synth disk read block %d\n", block_num);
#endif
if (synth_info->filefd >= 0)
{
cyg_hal_sys_lseek(synth_info->filefd,
block_num * chan->info->block_size,
CYG_HAL_SYS_SEEK_SET);
cyg_hal_sys_read(synth_info->filefd, buf, len*512);
return ENOERR;
}
return -EIO;
}
// ----------------------------------------------------------------------------
static Cyg_ErrNo
synth_disk_write(disk_channel *chan,
const void *buf,
cyg_uint32 len,
cyg_uint32 block_num)
{
synth_disk_info_t *synth_info = (synth_disk_info_t *)chan->dev_priv;
#ifdef DEBUG
diag_printf("synth disk write block %d\n", block_num);
#endif
if (synth_info->filefd >= 0)
{
cyg_hal_sys_lseek(synth_info->filefd,
block_num * chan->info->block_size,
CYG_HAL_SYS_SEEK_SET);
cyg_hal_sys_write(synth_info->filefd, buf, len*512);
// cyg_hal_sys_fdatasync(synth_info->filefd);
return ENOERR;
}
return -EIO;
}
// ----------------------------------------------------------------------------
static Cyg_ErrNo
synth_disk_get_config(disk_channel *chan,
cyg_uint32 key,
const void *xbuf,
cyg_uint32 *len)
{
#ifdef DEBUG
diag_printf("synth disk get config\n");
#endif
return -EINVAL;
}
// ----------------------------------------------------------------------------
static Cyg_ErrNo
synth_disk_set_config(disk_channel *chan,
cyg_uint32 key,
const void *xbuf,
cyg_uint32 *len)
{
Cyg_ErrNo res = ENOERR;
#ifdef DEBUG
diag_printf("synth disk set config\n");
#endif
switch ( key )
{
case CYG_IO_SET_CONFIG_DISK_MOUNT:
// We have nothing to do here for this option.
break;
case CYG_IO_SET_CONFIG_DISK_UMOUNT:
if( chan->info->mounts == 0 )
{
// If this is the last unmount of this disk, then disconnect it from
// the driver system so the user can swap it out if he wants.
res = (chan->callbacks->disk_disconnected)(chan);
}
break;
default:
res = -EINVAL;
break;
}
return res;
}
// ----------------------------------------------------------------------------
externC cyg_bool synth_disk_change( int unit, char *filename, int size,
int cyls, int heads, int sectors)
{
struct cyg_devtab_entry *tab = &synth_disk_io0;
disk_channel *chan = (disk_channel *) tab->priv;
synth_disk_info_t *synth_info = (synth_disk_info_t *) chan->dev_priv;
int err = 0;
if (!chan->init)
return false;
synth_info->filename = filename;
synth_info->size = size;
synth_info->cylinders_num = cyls;
synth_info->heads_num = heads;
synth_info->sectors_num = sectors;
#ifdef DEBUG
diag_printf("synth disk %d change size=%d\n",
synth_info->num, synth_info->size);
#endif
err = cyg_hal_sys_close( synth_info->filefd );
#ifdef DEBUG
if( err != 0 )
{
diag_printf("synth disk change, failed to close old image: %d\n",err);
}
#endif
synth_info->filefd = cyg_hal_sys_open(synth_info->filename,
CYG_HAL_SYS_O_RDWR,
CYG_HAL_SYS_S_IRWXU|CYG_HAL_SYS_S_IRWXG|CYG_HAL_SYS_S_IRWXO);
if (-ENOENT == synth_info->filefd)
{
synth_info->filefd = cyg_hal_sys_open(synth_info->filename,
CYG_HAL_SYS_O_RDWR|CYG_HAL_SYS_O_CREAT, 0644);
if (synth_info->filefd >= 0)
{
unsigned char b = 0x00;
int i;
for (i = 0; i < synth_info->size; i++)
cyg_hal_sys_write(synth_info->filefd, &b, 1);
}
}
if (synth_info->filefd < 0)
{
CYG_ASSERT(false, "Can't open/create disk image file");
return false;
}
return true;
}
// ----------------------------------------------------------------------------
// EOF synthdisk.c
|
