cleanups

Software/MainBoard/rust/src/hal/little_fs2storage_adapter.rs

@@ -0,0 +1,88 @@
+use embedded_storage::nor_flash::{check_erase, NorFlash, ReadNorFlash};
+use esp_bootloader_esp_idf::partitions::FlashRegion;
+use esp_storage::FlashStorage;
+use littlefs2::consts::U4096 as lfsCache;
+use littlefs2::consts::U512 as lfsLookahead;
+use littlefs2::driver::Storage as lfs2Storage;
+use littlefs2::io::Error as lfs2Error;
+use littlefs2::io::Result as lfs2Result;
+use log::error;
+
+pub struct LittleFs2Filesystem {
+    pub(crate) storage: &'static mut FlashRegion<'static, FlashStorage>,
+}
+
+impl lfs2Storage for LittleFs2Filesystem {
+    const READ_SIZE: usize = 4096;
+    const WRITE_SIZE: usize = 4096;
+    const BLOCK_SIZE: usize = 4096; //usually optimal for flash access
+    const BLOCK_COUNT: usize = 8 * 1000 * 1000 / 4096; //8Mb in 4k blocks + a little space for stupid calculation errors
+    const BLOCK_CYCLES: isize = 100;
+    type CACHE_SIZE = lfsCache;
+    type LOOKAHEAD_SIZE = lfsLookahead;
+
+    fn read(&mut self, off: usize, buf: &mut [u8]) -> lfs2Result<usize> {
+        let read_size: usize = Self::READ_SIZE;
+        if off % read_size != 0 {
+            error!("Littlefs2Filesystem read error: offset not aligned to read size offset: {} read_size: {}", off, read_size);
+            return Err(lfs2Error::IO);
+        }
+        if buf.len() % read_size != 0 {
+            error!("Littlefs2Filesystem read error: length not aligned to read size length: {} read_size: {}", buf.len(), read_size);
+            return Err(lfs2Error::IO);
+        }
+        match self.storage.read(off as u32, buf) {
+            Ok(..) => Ok(buf.len()),
+            Err(err) => {
+                error!("Littlefs2Filesystem read error: {:?}", err);
+                Err(lfs2Error::IO)
+            }
+        }
+    }
+
+    fn write(&mut self, off: usize, data: &[u8]) -> lfs2Result<usize> {
+        let write_size: usize = Self::WRITE_SIZE;
+        if off % write_size != 0 {
+            error!("Littlefs2Filesystem write error: offset not aligned to write size offset: {} write_size: {}", off, write_size);
+            return Err(lfs2Error::IO);
+        }
+        if data.len() % write_size != 0 {
+            error!("Littlefs2Filesystem write error: length not aligned to write size length: {} write_size: {}", data.len(), write_size);
+            return Err(lfs2Error::IO);
+        }
+        match self.storage.write(off as u32, data) {
+            Ok(..) => Ok(data.len()),
+            Err(err) => {
+                error!("Littlefs2Filesystem write error: {:?}", err);
+                Err(lfs2Error::IO)
+            }
+        }
+    }
+
+    fn erase(&mut self, off: usize, len: usize) -> lfs2Result<usize> {
+        let block_size: usize = Self::BLOCK_SIZE;
+        if off % block_size != 0 {
+            error!("Littlefs2Filesystem erase error: offset not aligned to block size offset: {} block_size: {}", off, block_size);
+            return lfs2Result::Err(lfs2Error::IO);
+        }
+        if len % block_size != 0 {
+            error!("Littlefs2Filesystem erase error: length not aligned to block size length: {} block_size: {}", len, block_size);
+            return lfs2Result::Err(lfs2Error::IO);
+        }
+
+        match check_erase(self.storage, off as u32, (off+len) as u32) {
+            Ok(_) => {}
+            Err(err) => {
+                error!("Littlefs2Filesystem check erase error: {:?}", err);
+                return lfs2Result::Err(lfs2Error::IO);
+            }
+        }
+        match self.storage.erase(off as u32, (off + len) as u32) {
+            Ok(..) => lfs2Result::Ok(len),
+            Err(err) => {
+                error!("Littlefs2Filesystem erase error: {:?}", err);
+                lfs2Result::Err(lfs2Error::IO)
+            }
+        }
+    }
+}