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fs: expose generic ramdisk/flash disk access functions

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This patch removes "FAT" from  files names, config names and
symbol names so as to avoid confusion, when other modules use
them in a more generic way.

Also flash_disk_access.c and ram_disk_access.c now exports generic
disk_access symbols as defined in include/disk_access.h rather
than FAT specific ones in fs/fat_diskio.h. Thus modules like
USB which need to use disk_access interface is not dependent
on symbols from ELMChan FAT module. Also fat_diskio.h
is removed.

Further the shim between ELM chan and Zephyr is modified as
per these changes.

Change-Id: Ifd80f14a629e467ee9c7a9aaff8a4896eed11982
Signed-off-by: Jithu Joseph <jithu.joseph@intel.com>
This commit is contained in:
Jithu Joseph 2016-11-01 19:24:25 -07:00 • committed by Anas Nashif
commit 2fe288b4aa
9 changed files with 546 additions and 159 deletions
Download patch file Download diff file Expand all files Collapse all files

58
ext/fs/fat/zfs_diskio.c
View file

@ -26,7 +26,8 @@
/----------------------------------------------------------------------------*/ /----------------------------------------------------------------------------*/
#include <diskio.h> /* FatFs lower layer API */ #include <diskio.h> /* FatFs lower layer API */
#include <fs/fat_diskio.h> #include <ffconf.h>
#include <disk_access.h>
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
/* Get Drive Status */ /* Get Drive Status */
@ -34,7 +35,11 @@
DSTATUS disk_status(BYTE pdrv) DSTATUS disk_status(BYTE pdrv)
{ {
return fat_disk_status(); if (disk_access_status() != 0) {
return STA_NOINIT;
} else {
return RES_OK;
}
} }
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
@ -43,7 +48,11 @@ DSTATUS disk_status(BYTE pdrv)
DSTATUS disk_initialize(BYTE pdrv) DSTATUS disk_initialize(BYTE pdrv)
{ {
return fat_disk_initialize(); if (disk_access_init() != 0) {
return STA_NOINIT;
} else {
return RES_OK;
}
} }
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
@ -52,7 +61,12 @@ DSTATUS disk_initialize(BYTE pdrv)
DRESULT disk_read(BYTE pdrv, BYTE *buff, DWORD sector, UINT count) DRESULT disk_read(BYTE pdrv, BYTE *buff, DWORD sector, UINT count)
{ {
return fat_disk_read(buff, sector, count); if (disk_access_read(buff, sector, count) != 0) {
return RES_ERROR;
} else {
return RES_OK;
}
} }
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
@ -60,7 +74,11 @@ DRESULT disk_read(BYTE pdrv, BYTE *buff, DWORD sector, UINT count)
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
DRESULT disk_write(BYTE pdrv, const BYTE *buff, DWORD sector, UINT count) DRESULT disk_write(BYTE pdrv, const BYTE *buff, DWORD sector, UINT count)
{ {
return fat_disk_write(buff, sector, count); if(disk_access_write(buff, sector, count) != 0) {
return RES_ERROR;
} else {
return RES_OK;
}
} }
/*-----------------------------------------------------------------------*/ /*-----------------------------------------------------------------------*/
@ -69,5 +87,33 @@ DRESULT disk_write(BYTE pdrv, const BYTE *buff, DWORD sector, UINT count)
DRESULT disk_ioctl(BYTE pdrv, BYTE cmd, void *buff) DRESULT disk_ioctl(BYTE pdrv, BYTE cmd, void *buff)
{ {
return fat_disk_ioctl(cmd, buff); int ret = RES_OK;
uint32_t tmp = 0;
switch (cmd) {
case CTRL_SYNC:
if(disk_access_ioctl(DISK_IOCTL_CTRL_SYNC, buff) != 0) {
ret = RES_ERROR;
}
break;
case GET_SECTOR_COUNT:
if (disk_access_ioctl(DISK_IOCTL_GET_DISK_SIZE, &tmp) != 0) {
ret = RES_ERROR;
} else {
*(uint32_t *) buff = (tmp / _MIN_SS) ;
}
break;
case GET_BLOCK_SIZE:
if (disk_access_ioctl(DISK_IOCTL_GET_ERASE_BLOCK_SZ, buff) != 0) {
ret = RES_ERROR;
}
break;
default:
ret = RES_PARERR;
break;
}
return ret;
} }

30
include/fs/fat_diskio.h
View file

@ -1,30 +0,0 @@
/*
* Copyright (c) 2016 Intel Corporation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _FAT_DISKIO_H_
#define _FAT_DISKIO_H_
#include <diskio.h>
#include <stdint.h>
DSTATUS fat_disk_status(void);
DSTATUS fat_disk_initialize(void);
DRESULT fat_disk_read(uint8_t *buff, unsigned long sector, uint32_t count);
DRESULT fat_disk_write(const uint8_t *buff, unsigned long sector,
uint32_t count);
DRESULT fat_disk_ioctl(uint8_t cmd, void *buff);
#endif /* _FAT_DISKIO_H_ */

12
subsys/fs/Kconfig
View file

@ -40,14 +40,14 @@ config FILE_SYSTEM_FAT
choice choice
prompt "Storage backend selection" prompt "Storage backend selection"
config FS_FAT_RAM_DISK config DISK_ACCESS_RAM
bool "RAM Disk" bool "RAM Disk"
help help
RAM buffer used to emulate storage disk. RAM buffer used to emulate storage disk.
This option can used to test the file This option can used to test the file
system. system.
config FS_FAT_FLASH_DISK config DISK_ACCESS_FLASH
bool "Flash" bool "Flash"
help help
Flash device is used for the file system. Flash device is used for the file system.
@ -56,20 +56,20 @@ endchoice
config FS_VOLUME_SIZE config FS_VOLUME_SIZE
hex hex
default 0x18000 if FS_FAT_RAM_DISK default 0x18000 if DISK_ACCESS_RAM
default 0x200000 if FS_FAT_FLASH_DISK_W25QXXDV default 0x200000 if FS_FAT_FLASH_DISK_W25QXXDV
help help
This is the file system volume size in bytes. This is the file system volume size in bytes.
config FS_BLOCK_SIZE config FS_BLOCK_SIZE
hex hex
default 0x1000 if FS_FAT_RAM_DISK default 0x1000 if DISK_ACCESS_RAM
default 0x1000 if FS_FAT_FLASH_DISK_W25QXXDV default 0x1000 if FS_FAT_FLASH_DISK_W25QXXDV
help help
This is typically the minimum block size that This is typically the minimum block size that
is erased at one time in flash storage. is erased at one time in flash storage.
if FS_FAT_FLASH_DISK if DISK_ACCESS_FLASH
config FS_FAT_FLASH_DISK_W25QXXDV config FS_FAT_FLASH_DISK_W25QXXDV
bool "W25QXXDV flash component" bool "W25QXXDV flash component"
@ -108,7 +108,7 @@ config FS_FLASH_ERASE_ALIGNMENT
the flash component. the flash component.
endif # FS_FAT_FLASH_DISK_W25QXXDV endif # FS_FAT_FLASH_DISK_W25QXXDV
endif # FS_FAT_FLASH_DISK endif # DISK_ACCESS_FLASH
endif # FILE_SYSTEM endif # FILE_SYSTEM
endmenu endmenu

7
subsys/fs/Makefile
View file

@ -1,4 +1,5 @@
obj-$(CONFIG_FS_FAT_RAM_DISK) += fat_ram_diskio.o
obj-$(CONFIG_FS_FAT_FLASH_DISK) += fat_flash_diskio.o
obj-$(CONFIG_FILE_SYSTEM_FAT) += fat_fs.o
obj-$(CONFIG_FILE_SYSTEM_SHELL) += shell.o obj-$(CONFIG_FILE_SYSTEM_SHELL) += shell.o
obj-$(CONFIG_FILE_SYSTEM_FAT) += fat_fs.o
obj-$(CONFIG_DISK_ACCESS_RAM) += disk_access_ram.o
obj-$(CONFIG_DISK_ACCESS_FLASH) += disk_access_flash.o

92
subsys/fs/fat_flash_diskio.c → subsys/fs/disk_access_flash.c
View file

@ -18,11 +18,13 @@
#include <stdint.h> #include <stdint.h>
#include <misc/__assert.h> #include <misc/__assert.h>
#include <misc/util.h> #include <misc/util.h>
#include <diskio.h> #include <disk_access.h>
#include <ff.h> #include <errno.h>
#include <device.h> #include <device.h>
#include <flash.h> #include <flash.h>
#define SECTOR_SIZE 512
static struct device *flash_dev; static struct device *flash_dev;
/* flash read-copy-erase-write operation */ /* flash read-copy-erase-write operation */
@ -40,36 +42,36 @@ static off_t lba_to_address(uint32_t sector_num)
{ {
off_t flash_addr; off_t flash_addr;
flash_addr = CONFIG_FS_FLASH_START + sector_num * _MIN_SS; flash_addr = CONFIG_FS_FLASH_START + sector_num * SECTOR_SIZE;
__ASSERT(flash_addr < (CONFIG_FS_FLASH_START + CONFIG_FS_VOLUME_SIZE), __ASSERT(flash_addr < (CONFIG_FS_FLASH_START + CONFIG_FS_VOLUME_SIZE),
"FS bound error"); "FS bound error");
return flash_addr; return flash_addr;
} }
DSTATUS fat_disk_status(void) int disk_access_status(void)
{ {
if (!flash_dev) { if (!flash_dev) {
return STA_NOINIT; return DISK_STATUS_NOMEDIA;
} }
return RES_OK; return DISK_STATUS_OK;
} }
DSTATUS fat_disk_initialize(void) int disk_access_init(void)
{ {
if (flash_dev) { if (flash_dev) {
return RES_OK; return 0;
} }
flash_dev = device_get_binding(CONFIG_FS_FLASH_DEV_NAME); flash_dev = device_get_binding(CONFIG_FS_FLASH_DEV_NAME);
if (!flash_dev) { if (!flash_dev) {
return STA_NOINIT; return -ENODEV;
} }
return RES_OK; return 0;
} }
DRESULT fat_disk_read(void *buff, uint32_t start_sector, int disk_access_read(uint8_t *buff, uint32_t start_sector,
uint32_t sector_count) uint32_t sector_count)
{ {
off_t fl_addr; off_t fl_addr;
@ -78,7 +80,7 @@ DRESULT fat_disk_read(void *buff, uint32_t start_sector,
uint32_t num_read; uint32_t num_read;
fl_addr = lba_to_address(start_sector); fl_addr = lba_to_address(start_sector);
remaining = (sector_count * _MIN_SS); remaining = (sector_count * SECTOR_SIZE);
len = CONFIG_FS_FLASH_MAX_RW_SIZE; len = CONFIG_FS_FLASH_MAX_RW_SIZE;
num_read = GET_NUM_BLOCK(remaining, CONFIG_FS_FLASH_MAX_RW_SIZE); num_read = GET_NUM_BLOCK(remaining, CONFIG_FS_FLASH_MAX_RW_SIZE);
@ -89,7 +91,7 @@ DRESULT fat_disk_read(void *buff, uint32_t start_sector,
} }
if (flash_read(flash_dev, fl_addr, buff, len) != 0) { if (flash_read(flash_dev, fl_addr, buff, len) != 0) {
return RES_ERROR; return -EIO;
} }
fl_addr += len; fl_addr += len;
@ -97,11 +99,11 @@ DRESULT fat_disk_read(void *buff, uint32_t start_sector,
remaining -= len; remaining -= len;
} }
return RES_OK; return 0;
} }
/* This performs read-copy into an output buffer */ /* This performs read-copy into an output buffer */
static DRESULT read_copy_flash_block(off_t start_addr, uint32_t size, static int read_copy_flash_block(off_t start_addr, uint32_t size,
const void *src_buff, const void *src_buff,
uint8_t *dest_buff) uint8_t *dest_buff)
{ {
@ -126,18 +128,18 @@ static DRESULT read_copy_flash_block(off_t start_addr, uint32_t size,
fl_addr + (CONFIG_FS_FLASH_MAX_RW_SIZE * i), fl_addr + (CONFIG_FS_FLASH_MAX_RW_SIZE * i),
dest_buff + (CONFIG_FS_FLASH_MAX_RW_SIZE * i), dest_buff + (CONFIG_FS_FLASH_MAX_RW_SIZE * i),
CONFIG_FS_FLASH_MAX_RW_SIZE) != 0) { CONFIG_FS_FLASH_MAX_RW_SIZE) != 0) {
return RES_ERROR; return -EIO;
} }
} }
/* overwrite with user data */ /* overwrite with user data */
memcpy(dest_buff + offset, src_buff, size); memcpy(dest_buff + offset, src_buff, size);
return RES_OK; return 0;
} }
/* input size is either less or equal to a block size, CONFIG_FS_BLOCK_SIZE. */ /* input size is either less or equal to a block size, CONFIG_FS_BLOCK_SIZE. */
static DRESULT update_flash_block(off_t start_addr, uint32_t size, static int update_flash_block(off_t start_addr, uint32_t size,
const void *buff) const void *buff)
{ {
off_t fl_addr; off_t fl_addr;
@ -147,8 +149,8 @@ static DRESULT update_flash_block(off_t start_addr, uint32_t size,
/* if size is a partial block, perform read-copy with user data */ /* if size is a partial block, perform read-copy with user data */
if (size < CONFIG_FS_BLOCK_SIZE) { if (size < CONFIG_FS_BLOCK_SIZE) {
if (read_copy_flash_block(start_addr, size, buff, fs_buff) != if (read_copy_flash_block(start_addr, size, buff, fs_buff) !=
RES_OK) { 0) {
return RES_ERROR; return -EIO;
} }
/* now use the local buffer as the source */ /* now use the local buffer as the source */
@ -161,7 +163,7 @@ static DRESULT update_flash_block(off_t start_addr, uint32_t size,
/* disable write-protection first before erase */ /* disable write-protection first before erase */
flash_write_protection_set(flash_dev, false); flash_write_protection_set(flash_dev, false);
if (flash_erase(flash_dev, fl_addr, CONFIG_FS_BLOCK_SIZE) != 0) { if (flash_erase(flash_dev, fl_addr, CONFIG_FS_BLOCK_SIZE) != 0) {
return RES_ERROR; return -EIO;
} }
/* write data to flash */ /* write data to flash */
@ -174,17 +176,17 @@ static DRESULT update_flash_block(off_t start_addr, uint32_t size,
if (flash_write(flash_dev, fl_addr, src, if (flash_write(flash_dev, fl_addr, src,
CONFIG_FS_FLASH_MAX_RW_SIZE) != 0) { CONFIG_FS_FLASH_MAX_RW_SIZE) != 0) {
return RES_ERROR; return -EIO;
} }
fl_addr += CONFIG_FS_FLASH_MAX_RW_SIZE; fl_addr += CONFIG_FS_FLASH_MAX_RW_SIZE;
src += CONFIG_FS_FLASH_MAX_RW_SIZE; src += CONFIG_FS_FLASH_MAX_RW_SIZE;
} }
return RES_OK; return 0;
} }
DRESULT fat_disk_write(const void *buff, uint32_t start_sector, int disk_access_write(const uint8_t *buff, uint32_t start_sector,
uint32_t sector_count) uint32_t sector_count)
{ {
off_t fl_addr; off_t fl_addr;
@ -192,7 +194,7 @@ DRESULT fat_disk_write(const void *buff, uint32_t start_sector,
uint32_t size; uint32_t size;
fl_addr = lba_to_address(start_sector); fl_addr = lba_to_address(start_sector);
remaining = (sector_count * _MIN_SS); remaining = (sector_count * SECTOR_SIZE);
/* check if start address is erased-aligned address */ /* check if start address is erased-aligned address */
if (fl_addr & (CONFIG_FS_FLASH_ERASE_ALIGNMENT - 1)) { if (fl_addr & (CONFIG_FS_FLASH_ERASE_ALIGNMENT - 1)) {
@ -204,9 +206,9 @@ DRESULT fat_disk_write(const void *buff, uint32_t start_sector,
~(CONFIG_FS_BLOCK_SIZE - 1))) { ~(CONFIG_FS_BLOCK_SIZE - 1))) {
/* not over block boundary (a partial block also) */ /* not over block boundary (a partial block also) */
if (update_flash_block(fl_addr, remaining, buff) != 0) { if (update_flash_block(fl_addr, remaining, buff) != 0) {
return RES_ERROR; return -EIO;
} }
return RES_OK; return 0;
} }
/* write goes over block boundary */ /* write goes over block boundary */
@ -214,7 +216,7 @@ DRESULT fat_disk_write(const void *buff, uint32_t start_sector,
/* write first partial block */ /* write first partial block */
if (update_flash_block(fl_addr, size, buff) != 0) { if (update_flash_block(fl_addr, size, buff) != 0) {
return RES_ERROR; return -EIO;
} }
fl_addr += size; fl_addr += size;
@ -230,7 +232,7 @@ DRESULT fat_disk_write(const void *buff, uint32_t start_sector,
if (update_flash_block(fl_addr, CONFIG_FS_BLOCK_SIZE, if (update_flash_block(fl_addr, CONFIG_FS_BLOCK_SIZE,
buff) != 0) { buff) != 0) {
return RES_ERROR; return -EIO;
} }
fl_addr += CONFIG_FS_BLOCK_SIZE; fl_addr += CONFIG_FS_BLOCK_SIZE;
@ -241,27 +243,33 @@ DRESULT fat_disk_write(const void *buff, uint32_t start_sector,
/* remaining partial block */ /* remaining partial block */
if (remaining) { if (remaining) {
if (update_flash_block(fl_addr, remaining, buff) != 0) { if (update_flash_block(fl_addr, remaining, buff) != 0) {
return RES_ERROR; return -EIO;
} }
} }
return RES_OK; return 0;
} }
DRESULT fat_disk_ioctl(uint8_t cmd, void *buff) int disk_access_ioctl(uint8_t cmd, void *buff)
{ {
switch (cmd) { switch (cmd) {
case CTRL_SYNC: case DISK_IOCTL_CTRL_SYNC:
return RES_OK; return 0;
case GET_SECTOR_COUNT: case DISK_IOCTL_GET_SECTOR_COUNT:
*(uint32_t *)buff = CONFIG_FS_VOLUME_SIZE / _MIN_SS; *(uint32_t *)buff = CONFIG_FS_VOLUME_SIZE / SECTOR_SIZE;
return RES_OK; return 0;
case GET_BLOCK_SIZE: /* in sectors */ case DISK_IOCTL_GET_SECTOR_SIZE:
*(uint32_t *)buff = CONFIG_FS_BLOCK_SIZE / _MIN_SS; *(uint32_t *) buff = SECTOR_SIZE;
return RES_OK; return 0;
case CTRL_TRIM: case DISK_IOCTL_GET_ERASE_BLOCK_SZ: /* in sectors */
*(uint32_t *)buff = CONFIG_FS_BLOCK_SIZE / SECTOR_SIZE;
return 0;
case DISK_IOCTL_GET_DISK_SIZE:
*(uint32_t *)buff = CONFIG_FS_VOLUME_SIZE;
return 0;
default:
break; break;
} }
return RES_PARERR; return -EINVAL;
} }

91
subsys/fs/disk_access_ram.c Normal file
View file

@ -0,0 +1,91 @@
/*
* Copyright (c) 2016 Intel Corporation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <string.h>
#include <stdint.h>
#include <misc/__assert.h>
#include <disk_access.h>
#include <errno.h>
#define RAMDISK_SECTOR_SIZE 512
#if defined(CONFIG_USB_MASS_STORAGE)
/* A 16KB initialized RAMdisk which will fit on most target's RAM. It
* is initialized with a valid file system for validating USB mass storage.
*/
#include "fat12_ramdisk.h"
#else
/* A 96KB RAM Disk, which meets ELM FAT fs's minimum block requirement. Fit for
* qemu testing (as it may exceed target's RAM limits).
*/
#define RAMDISK_VOLUME_SIZE (192 * RAMDISK_SECTOR_SIZE)
static uint8_t ramdisk_buf[RAMDISK_VOLUME_SIZE];
#endif
static void *lba_to_address(uint32_t lba)
{
__ASSERT(((lba * RAMDISK_SECTOR_SIZE) < RAMDISK_VOLUME_SIZE),
"FS bound error");
return &ramdisk_buf[(lba * RAMDISK_SECTOR_SIZE)];
}
int disk_access_status(void)
{
return DISK_STATUS_OK;
}
int disk_access_init(void)
{
return 0;
}
int disk_access_read(uint8_t *buff, uint32_t sector, uint32_t count)
{
memcpy(buff, lba_to_address(sector), count * RAMDISK_SECTOR_SIZE);
return 0;
}
int disk_access_write(const uint8_t *buff, uint32_t sector, uint32_t count)
{
memcpy(lba_to_address(sector), buff, count * RAMDISK_SECTOR_SIZE);
return 0;
}
int disk_access_ioctl(uint8_t cmd, void *buff)
{
switch (cmd) {
case DISK_IOCTL_CTRL_SYNC:
break;
case DISK_IOCTL_GET_SECTOR_COUNT:
*(uint32_t *) buff = RAMDISK_VOLUME_SIZE / RAMDISK_SECTOR_SIZE;
break;
case DISK_IOCTL_GET_SECTOR_SIZE:
*(uint32_t *) buff = RAMDISK_SECTOR_SIZE;
break;
case DISK_IOCTL_GET_ERASE_BLOCK_SZ:
*(uint32_t *) buff = 1;
break;
case DISK_IOCTL_GET_DISK_SIZE:
*(uint32_t *) buff = RAMDISK_VOLUME_SIZE;
break;
default:
return -EINVAL;
}
return 0;
}

340
subsys/fs/fat12_ramdisk.h Normal file
View file

@ -0,0 +1,340 @@
#ifndef __FAT12_RAMDISK_SAMPLE_H__
#define __FAT12_RAMDISK_SAMPLE_H__
#define RAMDISK_VOLUME_SIZE (32 * 512)
/* A tiny RAMdisk buffer which will fit on most target's RAM. The
* following array encodes a FAT12 partition which contains a single readme
* file within the root directory. The array initializes only 5 out of the
* 32 sectors, which need to have valid contents (though 32 x 512 = 16384
* is the total size). The 5 initialized sectors being boot sector (0),
* fat table (1, 2), directory table (3) and file(readme) contents (4).
*/
static uint8_t ramdisk_buf[RAMDISK_VOLUME_SIZE] = {
0xEB, 0x3C, 0x90, 0x4D, 0x53, 0x44, 0x4F, 0x53,
0x35, 0x2E, 0x30, 0x00, 0x02, 0x01, 0x01, 0x00,
0x01, 0x10, 0x00, 0x20, 0x00, 0xF8, 0x02, 0x00,
0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x29, 0x74,
0x19, 0x02, 0x27, 0x5A, 0x45, 0x50, 0x48, 0x59,
0x52, 0x20, 0x20, 0x55, 0x53, 0x42, 0x46, 0x41,
0x54, 0x31, 0x32, 0x20, 0x20, 0x20, 0x33, 0xC9,
0x8E, 0xD1, 0xBC, 0xF0, 0x7B, 0x8E, 0xD9, 0xB8,
0x00, 0x20, 0x8E, 0xC0, 0xFC, 0xBD, 0x00, 0x7C,
0x38, 0x4E, 0x24, 0x7D, 0x24, 0x8B, 0xC1, 0x99,
0xE8, 0x3C, 0x01, 0x72, 0x1C, 0x83, 0xEB, 0x3A,
0x66, 0xA1, 0x1C, 0x7C, 0x26, 0x66, 0x3B, 0x07,
0x26, 0x8A, 0x57, 0xFC, 0x75, 0x06, 0x80, 0xCA,
0x02, 0x88, 0x56, 0x02, 0x80, 0xC3, 0x10, 0x73,
0xEB, 0x33, 0xC9, 0x8A, 0x46, 0x10, 0x98, 0xF7,
0x66, 0x16, 0x03, 0x46, 0x1C, 0x13, 0x56, 0x1E,
0x03, 0x46, 0x0E, 0x13, 0xD1, 0x8B, 0x76, 0x11,
0x60, 0x89, 0x46, 0xFC, 0x89, 0x56, 0xFE, 0xB8,
0x20, 0x00, 0xF7, 0xE6, 0x8B, 0x5E, 0x0B, 0x03,
0xC3, 0x48, 0xF7, 0xF3, 0x01, 0x46, 0xFC, 0x11,
0x4E, 0xFE, 0x61, 0xBF, 0x00, 0x00, 0xE8, 0xE6,
0x00, 0x72, 0x39, 0x26, 0x38, 0x2D, 0x74, 0x17,
0x60, 0xB1, 0x0B, 0xBE, 0xA1, 0x7D, 0xF3, 0xA6,
0x61, 0x74, 0x32, 0x4E, 0x74, 0x09, 0x83, 0xC7,
0x20, 0x3B, 0xFB, 0x72, 0xE6, 0xEB, 0xDC, 0xA0,
0xFB, 0x7D, 0xB4, 0x7D, 0x8B, 0xF0, 0xAC, 0x98,
0x40, 0x74, 0x0C, 0x48, 0x74, 0x13, 0xB4, 0x0E,
0xBB, 0x07, 0x00, 0xCD, 0x10, 0xEB, 0xEF, 0xA0,
0xFD, 0x7D, 0xEB, 0xE6, 0xA0, 0xFC, 0x7D, 0xEB,
0xE1, 0xCD, 0x16, 0xCD, 0x19, 0x26, 0x8B, 0x55,
0x1A, 0x52, 0xB0, 0x01, 0xBB, 0x00, 0x00, 0xE8,
0x3B, 0x00, 0x72, 0xE8, 0x5B, 0x8A, 0x56, 0x24,
0xBE, 0x0B, 0x7C, 0x8B, 0xFC, 0xC7, 0x46, 0xF0,
0x3D, 0x7D, 0xC7, 0x46, 0xF4, 0x29, 0x7D, 0x8C,
0xD9, 0x89, 0x4E, 0xF2, 0x89, 0x4E, 0xF6, 0xC6,
0x06, 0x96, 0x7D, 0xCB, 0xEA, 0x03, 0x00, 0x00,
0x20, 0x0F, 0xB6, 0xC8, 0x66, 0x8B, 0x46, 0xF8,
0x66, 0x03, 0x46, 0x1C, 0x66, 0x8B, 0xD0, 0x66,
0xC1, 0xEA, 0x10, 0xEB, 0x5E, 0x0F, 0xB6, 0xC8,
0x4A, 0x4A, 0x8A, 0x46, 0x0D, 0x32, 0xE4, 0xF7,
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0x10, 0x91, 0x8B, 0x46, 0x18, 0x96, 0x92, 0x33,
0xD2, 0xF7, 0xF6, 0x91, 0xF7, 0xF6, 0x42, 0x87,
0xCA, 0xF7, 0x76, 0x1A, 0x8A, 0xF2, 0x8A, 0xE8,
0xC0, 0xCC, 0x02, 0x0A, 0xCC, 0xB8, 0x01, 0x02,
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0xBB, 0x00, 0x00, 0x60, 0x66, 0x6A, 0x00, 0xEB,
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/* Sector 1 FAT follows */
0xF8, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x0F,
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/* Sector 3 directory table - 2 entries (16 bytes) roor dir and readme file */
0x5A, 0x45, 0x50, 0x48, 0x59, 0x52, 0x20, 0x20,
0x55, 0x53, 0x42, 0x28, 0x00, 0x00, 0x00, 0x00,
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0x52, 0x45, 0x41, 0x44, 0x4D, 0x45, 0x20, 0x20,
0x54, 0x58, 0x54, 0x20, 0x00, 0x00, 0x36, 0x8F,
0x4A, 0x49, 0x4A, 0x49, 0x00, 0x00, 0xDC, 0x83,
0xBB, 0x32, 0x02, 0x00, 0x3E, 0x00, 0x00, 0x00,
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/* Sector 4 Contents of README file follows */
0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
#endif /* __FAT12_RAMDISK_SAMPLE_H__ */

71
subsys/fs/fat_ram_diskio.c
View file

@ -1,71 +0,0 @@
/*
* Copyright (c) 2016 Intel Corporation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <string.h>
#include <stdint.h>
#include <misc/__assert.h>
#include <diskio.h>
#include <ff.h>
static uint8_t file_buff[CONFIG_FS_VOLUME_SIZE];
static void *lba_to_address(uint32_t lba)
{
__ASSERT(((lba * _MIN_SS) < CONFIG_FS_VOLUME_SIZE), "FS bound error");
return &file_buff[(lba * _MIN_SS)];
}
DSTATUS fat_disk_status(void)
{
return RES_OK;
}
DSTATUS fat_disk_initialize(void)
{
return RES_OK;
}
DRESULT fat_disk_read(void *buff, uint32_t sector, uint32_t count)
{
memcpy(buff, lba_to_address(sector), count * _MIN_SS);
return RES_OK;
}
DRESULT fat_disk_write(void *buff, uint32_t sector, uint32_t count)
{
memcpy(lba_to_address(sector), buff, count * _MIN_SS);
return RES_OK;
}
DRESULT fat_disk_ioctl(uint8_t cmd, void *buff)
{
switch (cmd) {
case CTRL_SYNC:
return RES_OK;
case GET_SECTOR_COUNT:
*(uint32_t *) buff = CONFIG_FS_VOLUME_SIZE / _MIN_SS;
return RES_OK;
case GET_BLOCK_SIZE:
*(uint32_t *) buff = CONFIG_FS_BLOCK_SIZE / _MIN_SS;
return RES_OK;
case CTRL_TRIM:
break;
}
return RES_PARERR;
}

4
tests/fs/fat_fs/prj.conf
View file

@ -1,7 +1,9 @@
CONFIG_FILE_SYSTEM=y CONFIG_FILE_SYSTEM=y
CONFIG_FILE_SYSTEM_FAT=y CONFIG_FILE_SYSTEM_FAT=y
CONFIG_FS_FAT_FLASH_DISK=y CONFIG_DISK_ACCESS_FLASH=y
CONFIG_FS_FAT_FLASH_DISK_W25QXXDV=y CONFIG_FS_FAT_FLASH_DISK_W25QXXDV=y
CONFIG_FLASH=y CONFIG_FLASH=y
CONFIG_SPI=y CONFIG_SPI=y
CONFIG_GPIO=y CONFIG_GPIO=y
#CONFIG_DISK_ACCESS_RAM=y