414 lines
9.8 KiB
C
414 lines
9.8 KiB
C
/******************************************************************//**
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* @file dev_sflash.c
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* @brief SPI Flash driver of RT-Thread RTOS for using EFM32 USART module.
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* This driver is tested by using the M25PX16 device on the EFM32 development
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* kit.
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* COPYRIGHT (C) 2011, RT-Thread Development Team
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* @author onelife
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* @version 0.4 beta
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**********************************************************************
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* @section License
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* The license and distribution terms for this file may be found in the file LICENSE in this
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* distribution or at http://www.rt-thread.org/license/LICENSE
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**********************************************************************
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* @section Change Logs
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* Date Author Notes
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* 2011-05-06 onelife Initial creation for using EFM32 USART module
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*********************************************************************/
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/******************************************************************//**
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* @addtogroup efm32_dk
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* @{
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*********************************************************************/
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/* Includes -------------------------------------------------------------------*/
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#include "board.h"
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#include "drv_usart.h"
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#include "dev_sflash.h"
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#if defined(EFM32_USING_SFLASH)
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/* Private typedef -------------------------------------------------------------*/
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typedef struct
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{
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rt_uint8_t code;
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rt_uint32_t address:24;
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rt_uint32_t dummy:8;
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} sflash_instruction;
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/* Private define --------------------------------------------------------------*/
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/* Private macro --------------------------------------------------------------*/
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#ifdef EFM32_SFLASH_DEBUG
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#define sflash_debug(format,args...) rt_kprintf(format, ##args)
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#else
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#define sflash_debug(format,args...)
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#endif
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/* Private constants -----------------------------------------------------------*/
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static rt_uint8_t sflash_inst_code_tbl[] =
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{
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/* Instruction only */
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SFLASH_INST_CODE_WREN,
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SFLASH_INST_CODE_WRDI,
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SFLASH_INST_CODE_RDID_L,
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SFLASH_INST_CODE_RDID_S,
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SFLASH_INST_CODE_RDSR,
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SFLASH_INST_CODE_WRSR,
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SFLASH_INST_CODE_BE,
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SFLASH_INST_CODE_DP,
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SFLASH_INST_CODE_RDP,
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/* Instruction and address */
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SFLASH_INST_CODE_WRLR,
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SFLASH_INST_CODE_RDLR,
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SFLASH_INST_CODE_READ,
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SFLASH_INST_CODE_POTP,
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SFLASH_INST_CODE_PP,
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SFLASH_INST_CODE_DIFP,
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SFLASH_INST_CODE_SSE,
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SFLASH_INST_CODE_SE,
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/* Instruction, address and dummy read */
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SFLASH_INST_CODE_READ_F,
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SFLASH_INST_CODE_DOFR,
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SFLASH_INST_CODE_ROTP
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};
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static rt_uint16_t sflash_data_len_tbl[] =
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{
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/* Instruction only */
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SFLASH_REPLY_LEN_WREN,
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SFLASH_REPLY_LEN_WRDI,
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SFLASH_REPLY_LEN_RDID_L,
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SFLASH_REPLY_LEN_RDID_S,
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SFLASH_REPLY_LEN_RDSR,
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SFLASH_REPLY_LEN_WRSR,
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SFLASH_REPLY_LEN_BE,
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SFLASH_REPLY_LEN_DP,
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SFLASH_REPLY_LEN_RDP,
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/* Instruction and address */
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SFLASH_REPLY_LEN_WRLR,
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SFLASH_REPLY_LEN_RDLR,
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SFLASH_REPLY_LEN_READ,
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SFLASH_REPLY_LEN_POTP,
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SFLASH_REPLY_LEN_PP,
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SFLASH_REPLY_LEN_DIFP,
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SFLASH_REPLY_LEN_SSE,
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SFLASH_REPLY_LEN_SE,
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/* Instruction, address and dummy read */
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SFLASH_REPLY_LEN_READ_F,
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SFLASH_REPLY_LEN_DOFR,
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SFLASH_REPLY_LEN_ROTP
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};
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static rt_bool_t sflash_read_inst_tbl[] =
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{
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/* Instruction only */
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false,
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false,
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true,
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true,
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true,
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false,
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false,
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false,
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false,
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/* Instruction and address */
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false,
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true,
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true,
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false,
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false,
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false,
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false,
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false,
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/* Instruction, address and dummy read */
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true,
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true,
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true
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};
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/* Private variables ------------------------------------------------------------*/
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static rt_device_t sFlash = RT_NULL;
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static rt_bool_t sFlashAutoCs = true;
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/* Private function prototypes ---------------------------------------------------*/
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/* Private functions ------------------------------------------------------------*/
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/******************************************************************//**
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* @brief
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* Initialize the SPI Flash
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*
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* @details
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*
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* @note
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*
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* @return
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* Error code
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*********************************************************************/
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rt_err_t efm_spiFlash_init(void)
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{
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struct efm32_usart_device_t *usart;
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usart = (struct efm32_usart_device_t *)(sFlash->user_data);
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#if defined(EFM32_G290_DK)
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/* Enable SPI access to Flash */
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DVK_writeRegister(BC_SPI_CFG, 0);
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#endif
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do
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{
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/* Find SPI device */
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sFlash = rt_device_find(SFLASH_USING_DEVICE_NAME);
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if (sFlash == RT_NULL)
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{
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sflash_debug("SFLASH: Can't find device %s!\n",
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SFLASH_USING_DEVICE_NAME);
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break;
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}
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sflash_debug("SFLASH: Find device %s\n", SFLASH_USING_DEVICE_NAME);
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/* Config chip slect pin */
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if (!(usart->state & USART_STATE_AUTOCS))
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{
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GPIO_PinModeSet(SFLASH_CS_PORT, SFLASH_CS_PIN, gpioModePushPull, 1);
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sFlashAutoCs = false;
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}
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/* Open SPI device */
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if (sFlash->open(sFlash, RT_DEVICE_OFLAG_RDWR) != RT_EOK)
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{
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break;
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}
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return RT_EOK;
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} while(0);
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sflash_debug("SFLASH: Init failed!\n");
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return -RT_ERROR;
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}
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/******************************************************************//**
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* @brief
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* De-initialize the SPI Flash
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*
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* @details
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*
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* @note
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*
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* @return
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* Error code
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*********************************************************************/
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rt_err_t efm_spiFlash_deinit(void)
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{
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do
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{
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if (sFlash == RT_NULL)
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{
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sflash_debug("SFLASH: Already deinit!\n");
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break;
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}
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/* Close SPI device */
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if (sFlash->close(sFlash) != RT_EOK)
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{
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break;
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}
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sFlash = RT_NULL;
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sflash_debug("SFLASH: Close device %s\n", SFLASH_USING_DEVICE_NAME);
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return RT_EOK;
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} while(0);
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sflash_debug("SFLASH: Deinit failed!\n");
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return -RT_ERROR;
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}
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/******************************************************************//**
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* @brief
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* Set/Clear chip select
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*
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* @details
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*
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* @note
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*
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* @param[in] enable
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* Chip select pin setting
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*********************************************************************/
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static void efm_spiFlash_cs(rt_uint8_t enable)
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{
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if (!sFlashAutoCs)
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{
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if (enable)
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{
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GPIO_PinOutClear(SFLASH_CS_PORT, SFLASH_CS_PIN);
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}
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else
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{
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GPIO_PinOutSet(SFLASH_CS_PORT, SFLASH_CS_PIN);
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}
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}
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}
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/******************************************************************//**
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* @brief
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* Execute a command
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*
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* @details
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*
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* @note
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*
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* @param[in] command
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* SPI Flash instruction
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*
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* @param[in] address
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* Memory address
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*
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* @param[in] buffer
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* Poniter to the read/write buffer
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*
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* @param[in] size
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* Buffer size in byte
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*
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* @return
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* Number of read/written bytes
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*********************************************************************/
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rt_uint32_t efm_spiFlash_cmd(
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enum sflash_inst_type_t command,
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rt_uint32_t address,
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rt_uint8_t *buffer,
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rt_uint32_t size)
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{
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RT_ASSERT(sFlash != RT_NULL);
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sflash_instruction *inst;
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rt_uint8_t *inst_buf;
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rt_uint8_t inst_len, head_len;
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rt_uint32_t data_len;
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sflash_debug("SFLASH: Inst %x\n", sflash_inst_code_tbl[command]);
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if (sflash_data_len_tbl[command] && !size)
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{
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sflash_debug("SFLASH: No data!\n");
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return 0x00;
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}
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data_len = (sflash_data_len_tbl[command] < size)? \
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sflash_data_len_tbl[command] : size;
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if (data_len && (buffer == RT_NULL))
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{
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sflash_debug("SFLASH: No buffer specified!\n");
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return 0x00;
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}
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/* Allocate memory for write buffer */
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if (sflash_read_inst_tbl[command])
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{
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inst_buf = rt_malloc(6 + 4);
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inst = (sflash_instruction *)(inst_buf + 1);
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head_len = 1;
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}
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else
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{
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inst_buf = rt_malloc(5 + data_len);
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inst = (sflash_instruction *)inst_buf;
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head_len = 0;
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}
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/* Fill in instruction */
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inst->code = sflash_inst_code_tbl[command];
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if (command >= sflash_inst_wrlr)
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{
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/* MSB first */
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inst->address = ((address & 0x000000FF) << 16) | \
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(address & 0x0000FF00) | \
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((address & 0x00FF0000) >> 16);
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if (command >= sflash_inst_read_f)
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{
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inst->dummy = 0x00;
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inst_len = 5;
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}
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else
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{
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inst_len = 4;
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}
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}
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else
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{
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inst_len = 1;
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}
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head_len += inst_len;
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/* Fill in data and send the buffer */
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if (sflash_read_inst_tbl[command])
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{
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rt_off_t skip;
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inst_buf[0] = inst_len;
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*(rt_uint8_t **)(inst_buf + head_len) = buffer;
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if (command == sflash_inst_read)
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{
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skip = SFLASH_SPI_READ_SKIP;
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}
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else
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{
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skip = SFLASH_SPI_COMMAND_SKIP;
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}
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efm_spiFlash_cs(1);
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if (sFlash->read(sFlash, skip, inst_buf, \
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(data_len == size)? data_len - 1 : data_len) == 0)
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{
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sflash_debug("SFLASH: Read failed!\n");
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return 0x00;
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}
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efm_spiFlash_cs(0);
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buffer[data_len] = 0x00;
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sflash_debug("SFLASH: Read %d bytes data to 0x%x\n", data_len, buffer);
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}
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else
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{
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if (data_len)
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{
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rt_memcpy((inst_buf + head_len), buffer, data_len);
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}
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efm_spiFlash_cs(1);
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if (sFlash->write(sFlash, EFM32_NO_DATA, inst_buf, \
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head_len + data_len) == 0)
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{
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sflash_debug("SFLASH: Write failed!\n");
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return 0x00;
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}
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efm_spiFlash_cs(0);
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sflash_debug("SFLASH: Write %d/%d bytes data\n", data_len, \
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head_len + data_len);
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}
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/* Free the buffer */
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rt_free(inst_buf);
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return data_len;
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}
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/*********************************************************************
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* Export to FINSH
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*********************************************************************/
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#ifdef RT_USING_FINSH
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#include <finsh.h>
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void list_sflash(void)
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{
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rt_uint8_t buf[4];
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efm_spiFlash_cmd(sflash_inst_rdid_s, EFM32_NO_DATA, buf, sizeof(buf));
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rt_kprintf(" spi flash on %s\n", SFLASH_USING_DEVICE_NAME);
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rt_kprintf(" ------------------------------\n");
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rt_kprintf(" Manufacturer ID:\t%x\n", buf[0]);
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rt_kprintf(" Memory type:\t\t%x\n", buf[1]);
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rt_kprintf(" Memory capacity:\t%x\n", buf[2]);
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}
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FINSH_FUNCTION_EXPORT(list_sflash, list the SPI Flash.)
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#endif
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#endif /* defined(EFM32_USING_SFLASH) */
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/******************************************************************//**
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* @}
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*********************************************************************/
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