/* | |
* FreeRTOS+FAT FS V1.0.0 (C) 2013 HCC Embedded | |
* | |
* The FreeRTOS+FAT SL license terms are different to the FreeRTOS license | |
* terms. | |
* | |
* FreeRTOS+FAT SL uses a dual license model that allows the software to be used | |
* under a standard GPL open source license, or a commercial license. The | |
* standard GPL license (unlike the modified GPL license under which FreeRTOS | |
* itself is distributed) requires that all software statically linked with | |
* FreeRTOS+FAT SL is also distributed under the same GPL V2 license terms. | |
* Details of both license options follow: | |
* | |
* - Open source licensing - | |
* FreeRTOS+FAT SL is a free download and may be used, modified, evaluated and | |
* distributed without charge provided the user adheres to version two of the | |
* GNU General Public License (GPL) and does not remove the copyright notice or | |
* this text. The GPL V2 text is available on the gnu.org web site, and on the | |
* following URL: http://www.FreeRTOS.org/gpl-2.0.txt. | |
* | |
* - Commercial licensing - | |
* Businesses and individuals who for commercial or other reasons cannot comply | |
* with the terms of the GPL V2 license must obtain a commercial license before | |
* incorporating FreeRTOS+FAT SL into proprietary software for distribution in | |
* any form. Commercial licenses can be purchased from | |
* http://shop.freertos.org/fat_sl and do not require any source files to be | |
* changed. | |
* | |
* FreeRTOS+FAT SL is distributed in the hope that it will be useful. You | |
* cannot use FreeRTOS+FAT SL unless you agree that you use the software 'as | |
* is'. FreeRTOS+FAT SL is provided WITHOUT ANY WARRANTY; without even the | |
* implied warranties of NON-INFRINGEMENT, MERCHANTABILITY or FITNESS FOR A | |
* PARTICULAR PURPOSE. Real Time Engineers Ltd. and HCC Embedded disclaims all | |
* conditions and terms, be they implied, expressed, or statutory. | |
* | |
* http://www.FreeRTOS.org | |
* http://www.FreeRTOS.org/FreeRTOS-Plus | |
* | |
*/ | |
#include "../../api/fat_sl.h" | |
#include "../../psp/include/psp_string.h" | |
#include "drv.h" | |
#include "util.h" | |
#include "volume.h" | |
#include "../../version/ver_fat_sl.h" | |
#if VER_FAT_SL_MAJOR != 3 || VER_FAT_SL_MINOR != 2 | |
#error Incompatible FAT_SL version number! | |
#endif | |
F_DRIVER * mdrv = NULL; /* driver structure */ | |
/**************************************************************************** | |
* | |
* _f_checkstatus | |
* | |
* checking a volume driver status, if media is removed or has been changed | |
* | |
* RETURNS | |
* | |
* error code or zero if successful | |
* | |
***************************************************************************/ | |
unsigned char _f_checkstatus ( void ) | |
{ | |
if ( mdrv->getstatus != NULL ) | |
{ | |
if ( mdrv->getstatus( mdrv ) & ( F_ST_MISSING | F_ST_CHANGED ) ) | |
{ | |
gl_volume.state = F_STATE_NEEDMOUNT; /*card has been removed;*/ | |
return F_ERR_CARDREMOVED; | |
} | |
} | |
return F_NO_ERROR; | |
} | |
/**************************************************************************** | |
* | |
* _f_writesector | |
* | |
* write sector data on a volume, it calls low level driver function, it | |
* writes a complete sector | |
* | |
* INPUTS | |
* sector - which physical sector | |
* | |
* RETURNS | |
* error code or zero if successful | |
* | |
***************************************************************************/ | |
unsigned char _f_writeglsector ( unsigned long sector ) | |
{ | |
unsigned char retry; | |
if ( mdrv->writesector == NULL ) | |
{ | |
gl_volume.state = F_STATE_NEEDMOUNT; /*no write function*/ | |
return F_ERR_ACCESSDENIED; | |
} | |
if ( sector == (unsigned long)-1 ) | |
{ | |
if ( gl_file.modified ) | |
{ | |
sector = gl_file.pos.sector; | |
} | |
else | |
{ | |
sector = gl_volume.actsector; | |
} | |
} | |
if ( sector != (unsigned long)-1 ) | |
{ | |
if ( mdrv->getstatus != NULL ) | |
{ | |
unsigned int status; | |
status = mdrv->getstatus( mdrv ); | |
if ( status & ( F_ST_MISSING | F_ST_CHANGED ) ) | |
{ | |
gl_volume.state = F_STATE_NEEDMOUNT; /*card has been removed;*/ | |
return F_ERR_CARDREMOVED; | |
} | |
if ( status & ( F_ST_WRPROTECT ) ) | |
{ | |
gl_volume.state = F_STATE_NEEDMOUNT; /*card has been removed;*/ | |
return F_ERR_WRITEPROTECT; | |
} | |
} | |
gl_volume.modified = 0; | |
gl_file.modified = 0; | |
gl_volume.actsector = sector; | |
for ( retry = 3 ; retry ; retry-- ) | |
{ | |
int mdrv_ret; | |
mdrv_ret = mdrv->writesector( mdrv, (unsigned char *)gl_sector, sector ); | |
if ( !mdrv_ret ) | |
{ | |
return F_NO_ERROR; | |
} | |
if ( mdrv_ret == -1 ) | |
{ | |
gl_volume.state = F_STATE_NEEDMOUNT; /*card has been removed;*/ | |
return F_ERR_CARDREMOVED; | |
} | |
} | |
} | |
return F_ERR_ONDRIVE; | |
} /* _f_writeglsector */ | |
/**************************************************************************** | |
* | |
* _f_readsector | |
* | |
* read sector data from a volume, it calls low level driver function, it | |
* reads a complete sector | |
* | |
* INPUTS | |
* sector - which physical sector is read | |
* | |
* RETURNS | |
* error code or zero if successful | |
* | |
***************************************************************************/ | |
unsigned char _f_readglsector ( unsigned long sector ) | |
{ | |
unsigned char retry; | |
unsigned char ret; | |
if ( sector == gl_volume.actsector ) | |
{ | |
return F_NO_ERROR; | |
} | |
if ( gl_volume.modified || gl_file.modified ) | |
{ | |
ret = _f_writeglsector( (unsigned long)-1 ); | |
if ( ret ) | |
{ | |
return ret; | |
} | |
} | |
for ( retry = 3 ; retry ; retry-- ) | |
{ | |
int mdrv_ret; | |
mdrv_ret = mdrv->readsector( mdrv, (unsigned char *)gl_sector, sector ); | |
if ( !mdrv_ret ) | |
{ | |
gl_volume.actsector = sector; | |
return F_NO_ERROR; | |
} | |
if ( mdrv_ret == -1 ) | |
{ | |
gl_volume.state = F_STATE_NEEDMOUNT; /*card has been removed;*/ | |
return F_ERR_CARDREMOVED; | |
} | |
} | |
gl_volume.actsector = (unsigned long)-1; | |
return F_ERR_ONDRIVE; | |
} /* _f_readglsector */ | |