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// SPDX-License-Identifier: GPL-2.0-only
/*
* fat-pbl.c - PBL FAT filesystem barebox driver
*
* Copyright (c) 2019 Ahmad Fatoum, Pengutronix
*/
#define pr_fmt(fmt) "fat-pbl: " fmt
#include <common.h>
#include "integer.h"
#include "ff.h"
#include "diskio.h"
#include "pbl.h"
DRESULT disk_read(FATFS *fat, BYTE *buf, DWORD sector, BYTE count)
{
int ret = pbl_bio_read(fat->userdata, sector, buf, count);
return ret != count ? ret : 0;
}
ssize_t pbl_fat_load(struct pbl_bio *bio, const char *filename, void *dest, size_t len)
{
FATFS fs = {};
FIL file = {};
UINT nread;
int ret;
fs.userdata = bio;
/* mount fs */
ret = f_mount(&fs);
if (ret) {
pr_debug("f_mount(%s) failed: %d\n", filename, ret);
return ret;
}
ret = f_open(&fs, &file, filename, FA_OPEN_EXISTING | FA_READ);
if (ret) {
pr_debug("f_open(%s) failed: %d\n", filename, ret);
return ret;
}
pr_debug("Reading file %s to 0x%p\n", filename, dest);
ret = f_read(&file, dest, len, &nread);
if (ret) {
pr_debug("f_read failed: %d\n", ret);
return ret;
}
return f_size(&file) <= len ? nread : -ENOSPC;
}
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