410 lines
8.8 KiB
Markdown
410 lines
8.8 KiB
Markdown
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# FQSPI 驱动程序
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## 1. 概述
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- QSPI是Motorola公司推出的SPI接口的扩展,比SPI应用更加广泛。在SPI协议的基础上,Motorola公司对其功能进行了增强,大幅提升了数据交换能力。QSPI 是一种专用的通信接口,连接单、双或四(条数据线) SPI Flash 存储介质。
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- 本驱动程序提供了FT2000/4、D2000、E2000平台的QSPI功能
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- FT2000/4、D2000上包含 1 个通用 QSPI 接口控制器,作为QSPI Flash接口使用,片最大支持 2Gb(256MB)的容量,最大支持连接四个相同容量的Flash
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## 2. 功能
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- 驱动相关的源文件如下,
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- drivers/qspi/fqspi
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```
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.
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├── fqspi_norflash.c
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├── fqspi_norflash.h
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├── fqspi_g.c
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├── fqspi_hw.c
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├── fqspi_hw.h
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├── fqspi_sinit.c
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├── fqspi.h
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└── fqspi.c
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```
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## 3. 配置方法
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以下部分将指导您完成 FQSPI 驱动的软件配置:
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### 3.1 使用 SFUD 通用SPI协议框架
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- 使能 CONFIG_USE_QSPI 和 CONFIG_USE_SFUD 配置
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- 初始化 SFUD 框架
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- 调用 SFUD 提供的 API 读写 QSPI 设备
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关于 SFUD 框架的使用,可以参考[sfud.md](./sfud.md)
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### 3.2 不使用 SFUD 通用SPI协议框架
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- 使能 CONFIG_USE_QSPI 配置
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- 初始 QSPI 驱动
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- 调用 QSPI 提供的 API 读写 QSPI 设备,需要按照 QSPI 设备的手册实现相关的命令和协议
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## 4 应用示例
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### [fqspi_nor_flash](../../../baremetal/example/peripheral/qspi/qspi_nor_flash/README.md)
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### [qspi_sfud](../../../baremetal/example/storage/qspi_sfud/README.md)
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## 4. API参考
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### 4.1 用户数据结构
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- QSPI 驱动配置数据
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```c
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typedef struct
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{
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u32 instance_id; /* Id of device */
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uintptr base_addr; /* Base address of qspi */
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uintptr mem_start; /* Start address of qspi memory */
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u32 capacity; /* Flash capacity */
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u32 dev_num; /* Qspi device number */
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u32 channel; /* channel number */
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} FQspiConfig;
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```
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- QSPI 驱动控制数据
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```c
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typedef struct
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{
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FQspiConfig config;
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FQspiRdCfgDef rd_cfg;
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FQspiWrCfgDef wr_cfg;
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FQspiCommandPortDef cmd_def;
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FQspiCsTimingCfgDef cs_timing_cfg;
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u32 is_ready; /**< Device is initialized and ready */
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u32 flash_size; /* size of QSPI flash */
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} FQspiCtrl;
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```
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- QSPI 传输命令协议,指定传输的指令、地址和修饰符、数据三者的宽度
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```c
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typedef enum
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{
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FQSPI_TRANSFER_1_1_1 = 0x0,
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FQSPI_TRANSFER_1_1_2 = 0x1,
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FQSPI_TRANSFER_1_1_4 = 0x2,
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FQSPI_TRANSFER_1_2_2 = 0x3,
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FQSPI_TRANSFER_1_4_4 = 0x4,
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FQSPI_TRANSFER_2_2_2 = 0x5,
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FQSPI_TRANSFER_4_4_4 = 0x6
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}FQspiTransferMode;
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```
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- QSPI Flash的容量大小
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```c
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typedef enum
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{
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FQSPI_FLASH_CAP_4MB = 0b000,
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FQSPI_FLASH_CAP_8MB = 0b001,
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FQSPI_FLASH_CAP_16MB = 0b010,
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FQSPI_FLASH_CAP_32MB = 0b011,
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FQSPI_FLASH_CAP_64MB = 0b100,
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FQSPI_FLASH_CAP_128MB = 0b101,
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FQSPI_FLASH_CAP_256MB = 0b110,
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} FQspiFlashCapcityType;
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```
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- QSPI的SCK分频系数
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```c
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typedef enum
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{
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FQSPI_SCK_DIV_128 = 0x0,
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FQSPI_SCK_DIV_2 = 0x1,
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FQSPI_SCK_DIV_4 = 0x2,
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FQSPI_SCK_DIV_8 = 0x3,
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FQSPI_SCK_DIV_16 = 0x4,
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FQSPI_SCK_DIV_32 = 0x5,
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FQSPI_SCK_DIV_64 = 0x6
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}FQspiSckDivType;
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```
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- QSPI的地址长度格式
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```c
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typedef enum
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{
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FQSPI_ADDR_SEL_3 = 0x0,
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FQSPI_ADDR_SEL_4 = 0x1,
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}FQspiAddrType;
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```
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### 4.2 错误码定义
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- FQSPI_SUCCESS : fqspi success
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- FQSPI_INVAL_PARAM : fqspi invalid input parameters
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- FQSPI_NOT_READY : fqspi driver not ready
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- FQSPI_NOT_ALLIGN : fqspi address not alligned
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- FQSPI_NOT_SUPPORT : fqspi not support operation
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- FQSPI_TIMEOUT : fqspi wait timeout
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### 4.3 用户API接口
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#### FQspiLookupConfig
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- 获取FQSPI驱动的默认配置参数
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```c
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const FQspiConfig *FQspiLookupConfig(u32 instance_id)
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```
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Note:
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- 用户可以通过此接口获取驱动默认配置的副本,进行修改后,作为`FQspiCfgInitialize`函数的入参使用
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Input:
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- u32 instance_id, 选择的FQSPI控制器实例号
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Return:
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- const FQspiConfig *, 返回的默认驱动配置,返回NULL表示失败
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#### FQspiCfgInitialize
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- 完成FQSPI驱动实例的初始化,使之可以使用
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```c
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FError FQspiCfgInitialize(FQspiCtrl *instance_p, const FQspiConfig *input_config_p);
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```
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Note:
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- 此函数会重置FQSPI控制器和FQSPI控制数据
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Input:
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- FQspiCtrl *instance_p, FQSPI驱动控制数据
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- const FQspiConfig *input_config_p, FQSPI驱动配置数据
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Return:
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- FError, 错误码信息,FQSPI_SUCCESS 表示初始化成功,其它返回值表示初始化失败
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#### FQspiDeInitialize
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- 完成FQSPI驱动实例去初始化,之后不能使用
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```c
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void FQspiDeInitialize(FQspiCtrl *instance_p)
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```
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Note:
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- 此函数会重置FQSPI控制数据
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Input:
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- FQspiCtrl *instance_p, FQSPI驱动控制数据
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Return:
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无
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#### FQspiCommandPortConfig
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- 配置FQSPI命令端口寄存器的值
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```c
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FError FQspiCommandPortConfig(FQspiCtrl *pctrl)
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```
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Note:
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- 使用此函数前需要确保FQSPI驱动初始化成功
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- 配置FQSPI命令端口寄存器
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Input:
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- FQspiCtrl *pctrl, FQSPI驱动控制数据
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Return:
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- FError, 错误码信息,FQSPI_SUCCESS 表示数据读取成功,其它返回值表示读取失败
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#### FQspiRdCfgConfig
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- 配置FQSPI地址访问读配置寄存器的值
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```c
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FError FQspiRdCfgConfig(FQspiCtrl *pctrl)
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```
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Note:
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- 使用此函数前需要确保FQSPI驱动初始化成功
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- 配置QSPI地址访问读配置寄存器
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Input:
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- FQspiCtrl *pctrl, FQSPI驱动控制数据
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Return:
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- FError, 错误码信息,FQSPI_SUCCESS 表示数据读取成功,其它返回值表示读取失败
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#### FQspiSetLdPortData
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- 写FQSPI低位数据端口寄存器的值
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```c
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FError FQspiSetLdPortData(FQspiCtrl *pctrl, const u8 *buf, size_t len)
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```
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Note:
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- 使用此函数前需要确保FQSPI驱动初始化成功
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- 设置寄存器的值,可用于向flash传送数据
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Input:
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- FQspiCtrl *pctrl, FQSPI驱动控制数据
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- const u8 *buf, 写缓存,存储要写入的数据
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- size_t len, 要读取的buf长度
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Return:
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- FError, 错误码信息,FQSPI_SUCCESS 表示数据写入成功,其它返回值表示写入失败
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#### FQspiFlashSpecialInstruction
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- 读flash某些状态寄存器的值,此函数适配的flash型号为S25FS256S NorFlash芯片
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```c
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FError FQspiFlashSpecialInstruction(FQspiCtrl *pctrl, u8 cmd, u8 *buf, size_t len);
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```
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Note:
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- 使用此函数前需要确保FQSPI驱动初始化成功
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- 读取flash寄存器的值,主要支持RDID, RDSR1, RDSR2, RDCR指令
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Input:
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- FQspiCtrl *pctrl, FQSPI驱动控制数据
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- u8 cmd, 读寄存器状态的指令,具体参见flash芯片手册
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- u8 *buf, 读缓存,存储读到的寄存器值
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- size_t len, 要读取的buf长度
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Return:
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- FError, 错误码信息,FQSPI_SUCCESS 表示数据读取成功,其它返回值表示读取失败
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#### FQspiFlashWriteReg
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- 写flash寄存器的值
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```c
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FError FQspiFlashWriteReg(FQspiCtrl *pctrl, u8 command, const u8 *buf, size_t len)
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```
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Note:
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- 使用此函数前需要确保FQSPI驱动初始化成功
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Input:
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- FQspiCtrl *pctrl, FQSPI驱动控制数据
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- u8 command, 写寄存器的指令
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- const u8 *buf, 写缓存,存储写入的寄存器值
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- size_t len, 要写入的buf长度
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Return:
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- FError, 错误码信息,FQSPI_SUCCESS 表示数据写入成功,其它返回值表示写入失败
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#### FQspiFlashReadDataConfig
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- 读flash配置
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```c
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FError FQspiFlashReadDataConfig(FQspiCtrl *pctrl, u8 command)
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```
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Note:
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- 使用此函数前需要确保FQSPI驱动初始化成功
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- 配置采用何种方式读flash中的数据,read、fast read、quad read
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Input:
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- FQspiCtrl *pctrl, FQSPI驱动控制数据
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- u8 command 读flash数据的指令,具体参见flash芯片手册
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Return:
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- FError, 错误码信息,FQSPI_SUCCESS 表示读配置成功,其它返回值表示读配置失败
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#### FQspiFlashReadData
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- 读取norflash的数据
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```c
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size_t FQspiFlashReadData(FQspiCtrl *pctrl, u32 chip_addr, u8 *buf, size_t len)
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```
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Note:
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- 使用此函数前需要确保FQSPI驱动初始化成功
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- 使用此函数前需要使用FQspiFlashReadDataConfig函数配置读方式
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Input:
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- FQspiCtrl *pctrl, FQSPI驱动控制数据
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- u32 chip_addr, 读数据的起始地址
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- u8 *buf 读缓存, 存储读到的数据
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- size_t len, 要读取的buf长度
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Return:
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- FError, 错误码信息,FQSPI_SUCCESS 表示数据读取成功,其它返回值表示读取失败
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#### FQspiNorFlashWrite
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- 写norflash数据函数
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```c
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FError FQspiFlashWriteData(FQspiCtrl *pctrl, u8 command, u32 chip_addr, const u8 *buf, size_t len)
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```
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Note:
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- 使用此函数前需要确保FQSPI驱动初始化成功
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Input:
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- FQspiCtrl *pctrl, FQSPI驱动控制数据
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- u8 command 写flash数据的指令,具体参见flash手册
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- u32 chip_addr, 写数据的起始地址
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- u8 *buf 写缓存, 存储要写入的数据
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- size_t len, 要写入的buf长度
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Return:
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- FError, 错误码信息,FQSPI_SUCCESS 表示数据写入成功,其它返回值表示写入失败
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