Diff: targets/TARGET_Realtek/TARGET_AMEBA/ota_api.c

Revision:

173:e131a1973e81

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Realtek/TARGET_AMEBA/ota_api.c	Fri Sep 15 14:59:18 2017 +0100
@@ -0,0 +1,154 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2013-2017 Realtek Semiconductor Corp.
+ *
+ * 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.
+ */
+#include <stdio.h>
+#include <string.h>
+
+#include "mbed_wait_api.h"
+
+#include "rtl8195a.h"
+#include "flash_ext.h"
+
+#define FLASH_TOP           0x200000
+#define FLASH_SECTOR_SIZE   0x1000
+#define FLASH_SECTOR_MASK   ~(FLASH_SECTOR_SIZE - 1)
+#define OTA_REGION1         0x0b000
+#define OTA_REGION2         0xc0000
+#define TAG_OFS             0xc
+#define VER_OFS             0x10
+
+#define TAG_DOWNLOAD        0x81950001
+#define TAG_VERIFIED        0x81950003
+
+static flash_t flash_obj;
+
+typedef struct imginfo_s {
+    uint32_t base;
+    uint32_t tag;
+    uint64_t ver;
+} imginfo_t;
+
+
+void OTA_GetImageInfo(imginfo_t *info)
+{
+    uint32_t ver_hi, ver_lo;
+
+    flash_ext_read_word(&flash_obj, info->base + TAG_OFS, &info->tag);
+    flash_ext_read_word(&flash_obj, info->base + VER_OFS, &ver_lo);
+    flash_ext_read_word(&flash_obj, info->base + VER_OFS + 4, &ver_hi);
+
+    if (info->tag == TAG_DOWNLOAD) {
+        info->ver = ((uint64_t)ver_hi << 32) | (uint64_t) ver_lo;
+    } else {
+        info->ver = 0;
+    }
+}
+
+uint32_t OTA_GetBase(void)
+{
+    static uint32_t ota_base = 0;
+    imginfo_t region1, region2;
+
+    if (ota_base == OTA_REGION1 || ota_base == OTA_REGION2) {
+        return ota_base;
+    }
+
+    region1.base = OTA_REGION1;
+    region2.base = OTA_REGION2;
+
+    OTA_GetImageInfo(&region1);
+    OTA_GetImageInfo(&region2);
+
+    if (region1.ver >= region2.ver) {
+        ota_base = region2.base;
+    } else {
+        ota_base = region1.base;
+    }
+    return ota_base;
+}
+
+uint32_t OTA_MarkUpdateDone(void)
+{
+    uint32_t addr = OTA_GetBase() + TAG_OFS;
+
+    return flash_ext_write_word(&flash_obj, addr, TAG_DOWNLOAD);
+}
+
+uint32_t OTA_UpdateImage(uint32_t offset, uint32_t len, uint8_t *data)
+{
+    uint32_t addr, start, end, count, shift;
+    uint8_t *pdata = data;
+    uint8_t buf[FLASH_SECTOR_SIZE];
+
+    start = OTA_GetBase() + offset;
+    end = start + len;
+
+    if (data == NULL || start > FLASH_TOP || end > FLASH_TOP) {
+        return 0;
+    }
+
+    addr = start & FLASH_SECTOR_MASK;
+    if (addr != start) {
+        shift = start - addr;
+        count = MIN(FLASH_SECTOR_SIZE - shift, len);
+        flash_ext_stream_read(&flash_obj, addr, shift, buf);
+        memcpy((void *)(buf + shift), (void *)pdata, count);
+
+        flash_ext_erase_sector(&flash_obj, addr);
+        flash_ext_stream_write(&flash_obj, addr, FLASH_SECTOR_SIZE, buf);
+        addr += FLASH_SECTOR_SIZE;
+        pdata += count;
+    }
+
+    while (addr < end) {
+        printf("OTA: update addr=0x%lx, len=%ld\r\n", addr, len);
+        count = MIN(FLASH_SECTOR_SIZE, end - addr);
+        flash_ext_erase_sector(&flash_obj, addr);
+        flash_ext_stream_write(&flash_obj, addr, count, pdata);
+        addr += FLASH_SECTOR_SIZE;
+        pdata += count;
+    }
+    return len;
+}
+
+uint32_t OTA_ReadImage(uint32_t offset, uint32_t len, uint8_t *data)
+{
+    uint32_t addr, endaddr;
+
+    addr = OTA_GetBase() + offset;
+    endaddr = addr + len;
+
+    if (data == NULL || addr > FLASH_TOP || endaddr > FLASH_TOP) {
+        return 0;
+    }
+
+    printf("OTA: read addr=0x%lx\r\n", addr);
+    return flash_ext_stream_read(&flash_obj, addr, len, data);
+}
+
+void OTA_ResetTarget(void)
+{
+    __RTK_CTRL_WRITE32(0x14, 0x00000021);
+    wait(1);
+
+    // write SCB->AIRCR
+    HAL_WRITE32(0xE000ED00, 0x0C,
+                (0x5FA << 16) |                               // VECTKEY
+                (HAL_READ32(0xE000ED00, 0x0C) & (7 << 8)) | // PRIGROUP
+                (1 << 2));                                    // SYSRESETREQ
+
+    // not reached
+    while (1);
+}