From eb1a572eff56445bfee94b3aa945887ba9da6a6f Mon Sep 17 00:00:00 2001
From: Daniele Lacamera <dan@danielinux.net>
Date: Sat, 2 Nov 2019 14:45:27 +0100
Subject: [PATCH] Included spi driver.

---
 .gitignore       |  4 ++--
 usecfs_dev_spi.c | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+), 2 deletions(-)
 create mode 100644 usecfs_dev_spi.c

diff --git a/.gitignore b/.gitignore
index 0202824..5bb9810 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,6 @@
 *.o
 *.bin
-test/test
-test/test.bin
+image.elf
+image.map
 tags
 core
diff --git a/usecfs_dev_spi.c b/usecfs_dev_spi.c
new file mode 100644
index 0000000..fbd8a10
--- /dev/null
+++ b/usecfs_dev_spi.c
@@ -0,0 +1,36 @@
+#include <stdint.h>
+#include "usecfs_dev.h"
+#include "spi_flash.h"
+
+static uint32_t part_base = 0xFFFFFFFF;
+static uint32_t part_size = 0;
+
+void *block_open(void *args_ptr)
+{
+    uint32_t *args = (uint32_t *)args_ptr;
+    part_base = args[0];
+    part_size = args[1];
+    return &part_base;
+}
+
+int block_read(void *dev, void *_buf, uint32_t lba)
+{
+    if (part_size == 0)
+        return -1;
+    return spi_flash_read(part_base + (lba * BLOCK_SIZE), _buf, BLOCK_SIZE);
+}
+
+int block_write(void *dev, const void *_buf, uint32_t lba)
+{
+    if (part_size == 0)
+        return -1;
+    spi_flash_sector_erase(part_base + lba * BLOCK_SIZE);
+    return spi_flash_write(part_base + lba * BLOCK_SIZE, _buf, BLOCK_SIZE);
+}
+
+void block_close(void *dev)
+{
+    (void)dev;
+    part_base = 0xFFFFFFFF;
+    part_size = 0;
+}