Diff: components/storage/blockdevice/COMPONENT_FLASHIAP/FlashIAPBlockDevice.cpp

Revision:

2:7aab896b1a3b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/components/storage/blockdevice/COMPONENT_FLASHIAP/FlashIAPBlockDevice.cpp	Wed Mar 13 11:03:24 2019 +0000
@@ -0,0 +1,237 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2016 ARM Limited
+ *
+ * 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.
+ */
+
+#ifdef DEVICE_FLASH
+
+#include "FlashIAPBlockDevice.h"
+#include "mbed_critical.h"
+
+#include "mbed.h"
+
+#include <inttypes.h>
+
+#define FLASHIAP_READ_SIZE 1
+
+// Debug available
+#ifndef FLASHIAP_DEBUG
+#define FLASHIAP_DEBUG      0
+#endif
+
+#if FLASHIAP_DEBUG
+#define DEBUG_PRINTF(...) printf(__VA_ARGS__)
+#else
+#define DEBUG_PRINTF(...)
+#endif
+
+FlashIAPBlockDevice::FlashIAPBlockDevice(uint32_t address, uint32_t size)
+    : _flash(), _base(address), _size(size), _is_initialized(false), _init_ref_count(0)
+{
+
+}
+
+FlashIAPBlockDevice::~FlashIAPBlockDevice()
+{
+    deinit();
+}
+
+int FlashIAPBlockDevice::init()
+{
+    DEBUG_PRINTF("init\r\n");
+
+    if (!_is_initialized) {
+        _init_ref_count = 0;
+    }
+
+    uint32_t val = core_util_atomic_incr_u32(&_init_ref_count, 1);
+
+    if (val != 1) {
+        return BD_ERROR_OK;
+    }
+
+    int ret = _flash.init();
+
+    if (ret) {
+        core_util_atomic_decr_u32(&_init_ref_count, 1);
+        return ret;
+    }
+
+    if (_size + _base > _flash.get_flash_size() + _flash.get_flash_start()) {
+        core_util_atomic_decr_u32(&_init_ref_count, 1);
+        return BD_ERROR_DEVICE_ERROR;
+    }
+
+    if (_base < _flash.get_flash_start()) {
+        core_util_atomic_decr_u32(&_init_ref_count, 1);
+        return BD_ERROR_DEVICE_ERROR;
+    }
+
+    if (!_base) {
+        _base = _flash.get_flash_start();
+    }
+
+    if (!_size) {
+        _size = _flash.get_flash_size() - (_base - _flash.get_flash_start());
+    }
+
+    _is_initialized = true;
+    return ret;
+}
+
+int FlashIAPBlockDevice::deinit()
+{
+    DEBUG_PRINTF("deinit\r\n");
+
+    if (!_is_initialized) {
+        _init_ref_count = 0;
+        return 0;
+    }
+
+    uint32_t val = core_util_atomic_decr_u32(&_init_ref_count, 1);
+
+    if (val) {
+        return 0;
+    }
+
+    _is_initialized = false;
+
+    return _flash.deinit();
+}
+
+int FlashIAPBlockDevice::read(void *buffer,
+                              bd_addr_t virtual_address,
+                              bd_size_t size)
+{
+    DEBUG_PRINTF("read: %" PRIX64 " %" PRIX64 "\r\n", virtual_address, size);
+
+    /* Default to error return code; success must be set explicitly. */
+    int result = BD_ERROR_DEVICE_ERROR;
+
+    /* Check that the address and size are properly aligned and fit. */
+    if (_is_initialized && is_valid_read(virtual_address, size)) {
+
+        /* Convert virtual address to the physical address for the device. */
+        bd_addr_t physical_address = _base + virtual_address;
+
+        /* Read data using the internal flash driver. */
+        result = _flash.read(buffer, physical_address, size);
+
+        DEBUG_PRINTF("physical: %" PRIX64 "\r\n", physical_address);
+    }
+
+    return result;
+}
+
+int FlashIAPBlockDevice::program(const void *buffer,
+                                 bd_addr_t virtual_address,
+                                 bd_size_t size)
+{
+    DEBUG_PRINTF("program: %" PRIX64 " %" PRIX64 "\r\n", virtual_address, size);
+
+    /* Default to error return code; success must be set explicitly. */
+    int result = BD_ERROR_DEVICE_ERROR;
+
+    /* Check that the address and size are properly aligned and fit. */
+    if (_is_initialized && is_valid_program(virtual_address, size)) {
+
+        /* Convert virtual address to the physical address for the device. */
+        bd_addr_t physical_address = _base + virtual_address;
+
+        /* Write data using the internal flash driver. */
+        result = _flash.program(buffer, physical_address, size);
+
+        DEBUG_PRINTF("physical: %" PRIX64 " %" PRIX64 "\r\n",
+                     physical_address,
+                     size);
+    }
+
+    return result;
+}
+
+int FlashIAPBlockDevice::erase(bd_addr_t virtual_address,
+                               bd_size_t size)
+{
+    DEBUG_PRINTF("erase: %" PRIX64 " %" PRIX64 "\r\n", virtual_address, size);
+
+    /* Default to error return code; success must be set explicitly. */
+    int result = BD_ERROR_DEVICE_ERROR;
+
+    /* Check that the address and size are properly aligned and fit. */
+    if (_is_initialized && is_valid_erase(virtual_address, size)) {
+
+        /* Convert virtual address to the physical address for the device. */
+        bd_addr_t physical_address = _base + virtual_address;
+
+        /* Erase sector */
+        result = _flash.erase(physical_address, size);
+    }
+
+    return result;
+}
+
+bd_size_t FlashIAPBlockDevice::get_read_size() const
+{
+    DEBUG_PRINTF("get_read_size: %d\r\n", FLASHIAP_READ_SIZE);
+
+    return FLASHIAP_READ_SIZE;
+}
+
+bd_size_t FlashIAPBlockDevice::get_program_size() const
+{
+    if (!_is_initialized) {
+        return 0;
+    }
+
+    uint32_t page_size = _flash.get_page_size();
+
+    DEBUG_PRINTF("get_program_size: %" PRIX32 "\r\n", page_size);
+
+    return page_size;
+}
+
+bd_size_t FlashIAPBlockDevice::get_erase_size() const
+{
+    if (!_is_initialized) {
+        return 0;
+    }
+
+    uint32_t erase_size = _flash.get_sector_size(_base);
+
+    DEBUG_PRINTF("get_erase_size: %" PRIX32 "\r\n", erase_size);
+
+    return erase_size;
+}
+
+bd_size_t FlashIAPBlockDevice::get_erase_size(bd_addr_t addr) const
+{
+    if (!_is_initialized) {
+        return 0;
+    }
+
+    uint32_t erase_size = _flash.get_sector_size(_base + addr);
+
+    DEBUG_PRINTF("get_erase_size: %" PRIX32 "\r\n", erase_size);
+
+    return erase_size;
+}
+
+bd_size_t FlashIAPBlockDevice::size() const
+{
+    DEBUG_PRINTF("size: %" PRIX64 "\r\n", _size);
+
+    return _size;
+}
+
+#endif /* DEVICE_FLASH */