fatfs: enabled reading sector size and sectors count from boot sector in rawflash

components/fatfs/diskio/diskio_rawflash.c

@@ -1,16 +1,8 @@
-// Copyright 2015-2018 Espressif Systems (Shanghai) PTE LTD
+/*
-//
+ * SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
-// Licensed under the Apache License, Version 2.0 (the "License");
+ *
-// you may not use this file except in compliance with the License.
+ * SPDX-License-Identifier: Apache-2.0
-// 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 "diskio_impl.h"
@@ -22,11 +14,48 @@
 
 static const char* TAG = "diskio_rawflash";
 
-const esp_partition_t* ff_raw_handles[FF_VOLUMES];
+static const esp_partition_t* s_ff_raw_handles[FF_VOLUMES];
+// Determine the sector size and sector count by parsing the boot sector
+static size_t s_sector_size[FF_VOLUMES];
+static size_t s_sectors_count[FF_VOLUMES];
+
+#define BPB_BytsPerSec 11
+#define BPB_TotSec16 19
+#define BPB_TotSec32 32
 
 
 DSTATUS ff_raw_initialize (BYTE pdrv)
 {
+
+    uint16_t sector_size_tmp;
+    uint16_t sectors_count_tmp_16;
+    uint32_t sectors_count_tmp_32;
+
+    const esp_partition_t* part = s_ff_raw_handles[pdrv];
+    assert(part);
+    esp_err_t err = esp_partition_read(part, BPB_BytsPerSec, &sector_size_tmp, sizeof(sector_size_tmp));
+    if (unlikely(err != ESP_OK)) {
+        ESP_LOGE(TAG, "esp_partition_read failed (0x%x)", err);
+        return RES_ERROR;
+    }
+    s_sector_size[pdrv] = sector_size_tmp;
+
+    err = esp_partition_read(part, BPB_TotSec16, &sectors_count_tmp_16, sizeof(sectors_count_tmp_16));
+    if (unlikely(err != ESP_OK)) {
+        ESP_LOGE(TAG, "esp_partition_read failed (0x%x)", err);
+        return RES_ERROR;
+    }
+    s_sectors_count[pdrv] = sectors_count_tmp_16;
+    // For FAT32, the number of sectors is stored in a different field
+    if (sectors_count_tmp_16 == 0){
+        err = esp_partition_read(part, BPB_TotSec32, &sectors_count_tmp_32, sizeof(sectors_count_tmp_32));
+        if (unlikely(err != ESP_OK)) {
+            ESP_LOGE(TAG, "esp_partition_read failed (0x%x)", err);
+            return RES_ERROR;
+        }
+        s_sectors_count[pdrv] = sectors_count_tmp_32;
+    }
+
     return 0;
 }
 
@@ -38,9 +67,9 @@ DSTATUS ff_raw_status (BYTE pdrv)
 DRESULT ff_raw_read (BYTE pdrv, BYTE *buff, DWORD sector, UINT count)
 {
     ESP_LOGV(TAG, "ff_raw_read - pdrv=%i, sector=%i, count=%in", (unsigned int)pdrv, (unsigned int)sector, (unsigned int)count);
-    const esp_partition_t* part = ff_raw_handles[pdrv];
+    const esp_partition_t* part = s_ff_raw_handles[pdrv];
     assert(part);
-    esp_err_t err = esp_partition_read(part, sector * SPI_FLASH_SEC_SIZE, buff, count * SPI_FLASH_SEC_SIZE);
+    esp_err_t err = esp_partition_read(part, sector * s_sector_size[pdrv], buff, count * s_sector_size[pdrv]);
     if (unlikely(err != ESP_OK)) {
         ESP_LOGE(TAG, "esp_partition_read failed (0x%x)", err);
         return RES_ERROR;
@@ -56,17 +85,17 @@ DRESULT ff_raw_write (BYTE pdrv, const BYTE *buff, DWORD sector, UINT count)
 
 DRESULT ff_raw_ioctl (BYTE pdrv, BYTE cmd, void *buff)
 {
-    const esp_partition_t* part = ff_raw_handles[pdrv];
+    const esp_partition_t* part = s_ff_raw_handles[pdrv];
     ESP_LOGV(TAG, "ff_raw_ioctl: cmd=%in", cmd);
     assert(part);
     switch (cmd) {
         case CTRL_SYNC:
             return RES_OK;
         case GET_SECTOR_COUNT:
-            *((DWORD *) buff) = part->size / SPI_FLASH_SEC_SIZE;
+            *((DWORD *) buff) = s_sectors_count[pdrv];
             return RES_OK;
         case GET_SECTOR_SIZE:
-            *((WORD *) buff) = SPI_FLASH_SEC_SIZE;
+            *((WORD *) buff) = s_sector_size[pdrv];
             return RES_OK;
         case GET_BLOCK_SIZE:
             return RES_ERROR;
@@ -88,7 +117,7 @@ esp_err_t ff_diskio_register_raw_partition(BYTE pdrv, const esp_partition_t* par
         .ioctl = &ff_raw_ioctl
     };
     ff_diskio_register(pdrv, &raw_impl);
-    ff_raw_handles[pdrv] = part_handle;
+    s_ff_raw_handles[pdrv] = part_handle;
     return ESP_OK;
 
 }
@@ -97,7 +126,7 @@ esp_err_t ff_diskio_register_raw_partition(BYTE pdrv, const esp_partition_t* par
 BYTE ff_diskio_get_pdrv_raw(const esp_partition_t* part_handle)
 {
     for (int i = 0; i < FF_VOLUMES; i++) {
-        if (part_handle == ff_raw_handles[i]) {
+        if (part_handle == s_ff_raw_handles[i]) {
             return i;
         }
     }

components/fatfs/fatfs_utils/utils.py

@@ -48,8 +48,9 @@ LONG_NAMES_ENCODING: str = 'utf-16'
 SHORT_NAMES_ENCODING: str = 'utf-8'
 
 # compatible with WL_SECTOR_SIZE
-# choices are WL_SECTOR_SIZE_512 and WL_SECTOR_SIZE_4096
+# choices for WL are WL_SECTOR_SIZE_512 and WL_SECTOR_SIZE_4096
-ALLOWED_SECTOR_SIZES: List[int] = [512, 4096]
+ALLOWED_WL_SECTOR_SIZES: List[int] = [512, 4096]
+ALLOWED_SECTOR_SIZES: List[int] = [512, 1024, 2048, 4096]
 
 ALLOWED_SECTORS_PER_CLUSTER: List[int] = [1, 2, 4, 8, 16, 32, 64, 128]
 
@@ -164,7 +165,7 @@ def split_content_into_sectors(content: bytes, sector_size: int) -> List[bytes]:
     return result
 
 
-def get_args_for_partition_generator(desc: str) -> argparse.Namespace:
+def get_args_for_partition_generator(desc: str, wl: bool) -> argparse.Namespace:
     parser: argparse.ArgumentParser = argparse.ArgumentParser(description=desc)
     parser.add_argument('input_directory',
                         help='Path to the directory that will be encoded into fatfs image')
@@ -177,7 +178,7 @@ def get_args_for_partition_generator(desc: str) -> argparse.Namespace:
     parser.add_argument('--sector_size',
                         default=FATDefaults.SECTOR_SIZE,
                         type=int,
-                        choices=ALLOWED_SECTOR_SIZES,
+                        choices=ALLOWED_WL_SECTOR_SIZES if wl else ALLOWED_SECTOR_SIZES,
                         help='Size of the partition in bytes')
     parser.add_argument('--sectors_per_cluster',
                         default=1,

components/fatfs/fatfsgen.py

@@ -181,9 +181,7 @@ class FATFS:
 
 
 def main() -> None:
-    args = get_args_for_partition_generator('Create a FAT filesystem and populate it with directory content')
+    args = get_args_for_partition_generator('Create a FAT filesystem and populate it with directory content', wl=False)
-    if args.sector_size != 0x1000:
-        raise NotImplementedError('The sector size not equal to 4096 is currently not supported for read-only mode!')
     fatfs = FATFS(sector_size=args.sector_size,
                   sectors_per_cluster=args.sectors_per_cluster,
                   size=args.partition_size,

components/fatfs/wl_fatfsgen.py

@@ -201,8 +201,7 @@ class WLFATFS:
 
 if __name__ == '__main__':
     desc = 'Create a FAT filesystem with support for wear levelling and populate it with directory content'
-    args = get_args_for_partition_generator(desc)
+    args = get_args_for_partition_generator(desc, wl=True)
-
     wl_fatfs = WLFATFS(sectors_per_cluster=args.sectors_per_cluster,
                        size=args.partition_size,
                        sector_size=args.sector_size,

tools/ci/check_copyright_ignore.txt

@@ -649,7 +649,6 @@ components/esp_wifi/src/smartconfig.c
 components/esp_wifi/test/test_wifi_init.c
 components/fatfs/diskio/diskio.c
 components/fatfs/diskio/diskio_impl.h
-components/fatfs/diskio/diskio_rawflash.c
 components/fatfs/diskio/diskio_rawflash.h
 components/fatfs/diskio/diskio_wl.h
 components/fatfs/port/freertos/ffsystem.c