src/main/drivers/flash.h

   1 /*
   2  * This file is part of Cleanflight and Betaflight.
   3  *
   4  * Cleanflight and Betaflight are free software. You can redistribute
   5  * this software and/or modify this software under the terms of the
   6  * GNU General Public License as published by the Free Software
   7  * Foundation, either version 3 of the License, or (at your option)
   8  * any later version.
   9  *
  10  * Cleanflight and Betaflight are distributed in the hope that they
  11  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  12  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13  * See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this software.
  17  *
  18  * If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #pragma once
  22
  23 #include <stdint.h>
  24
  25 #include "pg/flash.h"
  26 #include "drivers/io.h"
  27
  28 // Maximum page size of all supported SPI flash devices.
  29 // Used to detect flashfs allocation size being too small.
  30 #define FLASH_MAX_PAGE_SIZE       2048
  31
  32 #define SPIFLASH_INSTRUCTION_RDID 0x9F
  33
  34 typedef enum {
  35     FLASH_TYPE_NOR = 0,
  36     FLASH_TYPE_NAND
  37 } flashType_e;
  38
  39 typedef uint16_t flashSector_t;
  40
  41 typedef struct flashGeometry_s {
  42     flashSector_t sectors; // Count of the number of erasable blocks on the device
  43     uint16_t pageSize; // In bytes
  44     uint32_t sectorSize; // This is just pagesPerSector * pageSize
  45     uint32_t totalSize;  // This is just sectorSize * sectors
  46     uint16_t pagesPerSector;
  47     flashType_e flashType;
  48     uint32_t jedecId;
  49 } flashGeometry_t;
  50
  51
  52 typedef enum {
  53     /*
  54      * When set it indicates the system was booted in memory mapped mode, flash chip is already configured by
  55      * the bootloader and does not need re-configuration.
  56      * When un-set the system was booted normally and the flash chip needs configuration before use.
  57      */
  58     FLASH_CF_SYSTEM_IS_MEMORY_MAPPED  = (1 << 0),
  59 } flashConfigurationFlags_e;
  60
  61 void flashPreInit(const flashConfig_t *flashConfig);
  62 bool flashInit(const flashConfig_t *flashConfig);
  63
  64 bool flashIsReady(void);
  65 bool flashWaitForReady(void);
  66 void flashEraseSector(uint32_t address);
  67 void flashEraseCompletely(void);
  68 void flashPageProgramBegin(uint32_t address, void (*callback)(uint32_t arg));
  69 uint32_t flashPageProgramContinue(const uint8_t **buffers, uint32_t *bufferSizes, uint32_t bufferCount);
  70 void flashPageProgramFinish(void);
  71 void flashPageProgram(uint32_t address, const uint8_t *data, uint32_t length, void (*callback)(uint32_t length));
  72 int flashReadBytes(uint32_t address, uint8_t *buffer, uint32_t length);
  73 void flashFlush(void);
  74 const flashGeometry_t *flashGetGeometry(void);
  75
  76 void flashMemoryMappedModeDisable(void);
  77 void flashMemoryMappedModeEnable(void);
  78
  79
  80 //
  81 // flash partitioning api
  82 //
  83
  84 typedef struct flashPartition_s {
  85     uint8_t type;
  86     flashSector_t startSector;
  87     flashSector_t endSector;
  88 } flashPartition_t;
  89
  90 #define FLASH_PARTITION_SECTOR_COUNT(partition) (partition->endSector + 1 - partition->startSector) // + 1 for inclusive, start and end sector can be the same sector.
  91
  92 // Must be in sync with flashPartitionTypeNames[]
  93 // Should not be deleted or reordered once the code is writing a table to a flash.
  94 typedef enum {
  95     FLASH_PARTITION_TYPE_UNKNOWN = 0,
  96     FLASH_PARTITION_TYPE_PARTITION_TABLE,
  97     FLASH_PARTITION_TYPE_FLASHFS,
  98     FLASH_PARTITION_TYPE_BADBLOCK_MANAGEMENT,
  99     FLASH_PARTITION_TYPE_FIRMWARE,
 100     FLASH_PARTITION_TYPE_CONFIG,
 101     FLASH_MAX_PARTITIONS
 102 } flashPartitionType_e;
 103
 104 typedef struct flashPartitionTable_s {
 105     flashPartition_t partitions[FLASH_MAX_PARTITIONS];
 106 } flashPartitionTable_t;
 107
 108 void flashPartitionSet(uint8_t index, uint32_t startSector, uint32_t endSector);
 109 flashPartition_t *flashPartitionFindByType(flashPartitionType_e type);
 110 const flashPartition_t *flashPartitionFindByIndex(uint8_t index);
 111 const char *flashPartitionGetTypeName(flashPartitionType_e type);
 112 int flashPartitionCount(void);