791 lines
18 KiB
C
791 lines
18 KiB
C
/*
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* File : sdcard.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2007 - 2012, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2007-12-02 Yi.Qiu the first version
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* 2010-01-01 Bernard Modify for mini2440
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* 2010-10-13 Wangmeng Added sep4020 support
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*/
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#include "sdcard.h"
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//#include <dfs_config.h>
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volatile rt_int32_t RCA;
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#ifdef RT_USING_DFS
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/* RT-Thread Device Driver Interface */
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#include <rtthread.h>
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#include <dfs_fs.h>
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/*GLOBAL SD DEVICE PONITER*/
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static struct sd_device *ptr_sddev;
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static rt_uint8_t gsec_buf[SECTOR_SIZE];
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#define USE_TIMEOUT
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/*This file is to power on/off the SEP4020 SDC*/
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/**
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* This function will power on/off the SEP4020 SDC
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*
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* @param sd_ctl: 0/power on; 1/power off
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* @return none
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*
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*/
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static void sd_pwr(int sd_ctl)
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{
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if (sd_ctl)
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{
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*(RP)GPIO_PORTA_SEL |= 0x0200;
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*(RP)GPIO_PORTA_DIR &= (~0x0200);
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*(RP)GPIO_PORTA_DATA |= 0x0200;
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}
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else
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{
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*(RP)GPIO_PORTA_SEL |= 0x0200;
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*(RP)GPIO_PORTA_DIR &= (~0x0200);
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*(RP)GPIO_PORTA_DATA &= (~0x0200);
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}
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}
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/*a nop operation to delay*/
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static void delay (U32 j)
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{
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U32 i;
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for (i=0;i<j;i++)
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{};
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}
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/*
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* Send the command to set the data transfer mode
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* @param cmd:the command to sent
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* @param arg:the argument of the command
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* @param mode:SDC transfer mode
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* @param blk_len:the block size of each data
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* @param num:number of blocks
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* @param mask:sdc interrupt mask
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*/
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static rt_err_t cmd_data(U16 cmd,U32 arg,U16 mode,U16 blk_len,U16 num,U16 mask)
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{
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U32 i;
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#ifdef USE_TIMEOUT
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U32 to = 10000;
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#endif
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*(RP)SDC_CLOCK_CONTROL = 0Xff00; //配置SD时钟，512分频,关闭SD 时钟
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*(RP)SDC_CLOCK_CONTROL = 0Xff04; //打开SD时钟，512分频,开启SD 时钟
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*(RP)SDC_INTERRUPT_STATUS_MASK = mask; //中断状态屏蔽寄存器赋值
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*(RP)SDC_TRANSFER_MODE = mode; //传输模式选择寄存器赋值
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*(RP)SDC_BLOCK_SIZE = blk_len; //数据块长度寄存器赋值
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*(RP)SDC_BLOCK_COUNT = num; //数据块数目寄存器赋值
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*(RP)SDC_ARGUMENT = arg; //命令参数寄存器赋值
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*(RP)SDC_COMMAND = cmd; //命令控制寄存器赋值
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delay(10);
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i = *(RP)SDC_INTERRUPT_STATUS & 0x1000;
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while(i != 0x1000) //判断：是否命令发送完毕，并且收到响应
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{
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i = *(RP)SDC_INTERRUPT_STATUS & 0x1000;
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#ifdef USE_TIMEOUT
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to --;
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if(!to)
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{
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EOUT("%s TIMEOUT\n",__FUNCTION__);
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return RT_ETIMEOUT;
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}
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#endif
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}
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delay(160);
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#ifdef USE_TIMEOUT
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//DBOUT("cmd_data TO is %d\n",to);
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#endif
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return *(RP)SDC_RESPONSE0; //返回命令反馈信息
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}
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static rt_err_t cmd_response(U16 Cmd,U32 Arg,U16 TransMode,U16 BlkLen,U16 Nob,U16 IntMask)
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{
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U32 i;
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#ifdef USE_TIMEOUT
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U32 to = 50000;
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#endif
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*(RP)SDC_CLOCK_CONTROL=0Xff00; //配置SD时钟
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*(RP)SDC_CLOCK_CONTROL=0Xff04; //打开SD时钟
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*(RP)SDC_INTERRUPT_STATUS_MASK=IntMask; //中断状态屏蔽寄存器赋值
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*(RP)SDC_TRANSFER_MODE=TransMode; //传输模式选择寄存器赋值
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*(RP)SDC_BLOCK_SIZE=BlkLen; //数据块长度寄存器赋值
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*(RP)SDC_BLOCK_COUNT=Nob; //数据块数目寄存器赋值
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*(RP)SDC_ARGUMENT=Arg; //命令参数寄存器赋值
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*(RP)SDC_COMMAND=Cmd; //命令控制寄存器赋值
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delay(10);
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i = *(RP)SDC_INTERRUPT_STATUS & 0x1040;
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while(i != 0x1040) //判断：命令发送完毕，并且收到响应，数据传输完毕。这三项是否已经都完成。
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{
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i = *(RP)SDC_INTERRUPT_STATUS & 0x1040;
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#ifdef USE_TIMEOUT
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to--;
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if(!to)
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{
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EOUT("%s Timeout\n",__FUNCTION__);
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return RT_ETIMEOUT;
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}
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#endif
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}
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//DBOUT("cmd_response TO is %d\n",to);
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delay(100);
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return RT_EOK; //返回命令反馈信息
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}
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static rt_err_t cmd_wait(U16 Cmd,U32 Arg,U16 IntMask )
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{
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int i;
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#ifdef USE_TIMEOUT
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U32 to=200000;
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#endif
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*(RP)SDC_CLOCK_CONTROL=0Xff00; //配置SD时钟
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*(RP)SDC_CLOCK_CONTROL=0Xff04; //打开SD时钟
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*(RP)SDC_COMMAND=Cmd; //命令控制寄存器赋值
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*(RP)SDC_INTERRUPT_STATUS_MASK=IntMask; //中断状态屏蔽寄存器赋值
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*(RP)SDC_ARGUMENT=Arg; //命令参数寄存器赋值
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i = *(RP)SDC_INTERRUPT_STATUS & 0x1000;
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while(i != 0x1000) //判断：是否命令发送完毕，并且收到响应
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{
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i = *(RP)SDC_INTERRUPT_STATUS & 0x1000;
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#ifdef USE_TIMEOUT
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to--;
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if(!to)
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{
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EOUT("%s Timeout\n",__FUNCTION__);
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return RT_ETIMEOUT;
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}
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#endif
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}
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//DBOUT("cmd_wait TO is %d\n",to);
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delay(10);
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return RT_EOK; //返回命令反馈信息以及数值1
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}
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/**
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* This function will set a hook function, which will be invoked when a memory
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* block is allocated from heap memory.
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*
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* @param hook the hook function
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*/
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static rt_err_t sd_init(void)
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{
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rt_err_t err;
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#ifdef USE_TIMEOUT
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rt_uint32_t to=1000;
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#endif
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sd_pwr(1);
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*(RP)SDC_SOFTWARE_RESET=0x0; //触发软复位,对其写0是进行reset
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delay(200);
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*(RP)SDC_SOFTWARE_RESET=0x1; //不触发软复位
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delay(200);
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cmd_wait(0x08,0x0,0xfff); //CMD0，命令发送使能
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do
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{
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err = cmd_wait(0x6ea,0x0,0xfff); //CMD55,以切换到ACMD命令
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#ifdef USE_TIMEOUT
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if(err != RT_EOK)
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{
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EOUT("cmd_wait err in %s\n",__FUNCTION__);
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return RT_ETIMEOUT;
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}
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#endif
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delay(3);
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err = cmd_wait(0x52a,0x80ff8000,0xfff); //ACMD41，向SD控制器发送命令，等待SD控制器确认收到命令
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if(err != RT_EOK)
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{
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EOUT("cmd_wait err in %s\n",__FUNCTION__);
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return RT_ETIMEOUT;
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}
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#ifdef USE_TIMEOUT
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to--;
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if(!to)
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{
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EOUT("%s timeout\n",__FUNCTION__);
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return RT_ETIMEOUT;
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}
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#endif
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}while(*(RP)SDC_RESPONSE0<0X80008000);
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#ifdef USE_TIMEOUT
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//DBOUT("%s TO is %d\n",__FUNCTION__,to);
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#endif
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cmd_data(0x49,0X0,0X0,0x0,0x0,0Xfff);//CMD2，发送CID
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cmd_data(0x6a,0X0,0X0,0x0,0x0,0Xfff);//CMD3，询问卡片发出新的相关地址
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RCA = *(RP)SDC_RESPONSE0;
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cmd_data(0xea,RCA,0X0,0x0,0x0,0Xfff);//CMD7，设置选择性的相关参数
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return RT_EOK;
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}
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/**
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* This function will set a hook function, which will be invoked when a memory
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* block is allocated from heap memory.
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*
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* @param hook the hook function
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*/
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static rt_err_t sd_readblock(rt_uint32_t address, rt_uint8_t* buf)
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{
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U32 complete,i;
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rt_uint8_t temp;
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rt_err_t err;
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RT_UNUSED rt_uint32_t discard;
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#ifdef USE_TIMEOUT
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rt_uint32_t to = 10;
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#endif
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//rt_kprintf("in readblock:%x\n",address);
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//Clear all the errors & interrups
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*(RP)DMAC_INTINTERRCLR |= 0x1;
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*(RP)DMAC_INTINTERRCLR &= ~0x1;
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*(RP)DMAC_INTTCCLEAR |= 0x1;
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*(RP)DMAC_INTTCCLEAR &= ~0x1;
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/*Clear read fifo*/
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*(RP)(SDC_INTERRUPT_STATUS_MASK) = ~(0x1<<9); //don't mask fifo empty
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while((*(RP)SDC_INTERRUPT_STATUS)&0x200 != 0x200)
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discard = *(RP)SDC_READ_BUFER_ACCESS;
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/*DMAC2,word,size=0x80*/
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*(RP)DMAC_C2SRCADDR = SDC_READ_BUFER_ACCESS;
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*(RP)DMAC_C2DESTADDR = (rt_uint32_t)buf;
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*(RP)DMAC_C2CONTROL =0x20249b;
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*(RP)DMAC_C2CONFIGURATION = 0x38d;
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err = cmd_wait(0x6ea,RCA,0xfff);
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if(err != RT_EOK)
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{
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rt_set_errno(err);
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return err;
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}
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err = cmd_wait(0xca,0x2,0xfff);
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if(err != RT_EOK)
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{
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rt_set_errno(err);
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return err;
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}
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err = cmd_response(0x22e,address,0X1,0x0200,0x1,0Xfff); //CMD17 4bit mode
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if(err != RT_EOK)
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{
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rt_set_errno(err);
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return err;
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}
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complete = *(RP)SDC_INTERRUPT_STATUS;
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/*CRC*/
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if((complete |0xfffffffd) !=0xfffffffd)
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{
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rt_kprintf("CRC ERROR!!!\n");
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complete = *(RP)SDC_INTERRUPT_STATUS;
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}
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while(((*(RP)( DMAC_INTTCSTATUS)) & 0x4) != 0x4 )
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{
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delay(10);
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#ifdef USE_TIMEOUT
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to--;
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if(!to)
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{
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EOUT("%s TIMEOUT\n",__FUNCTION__);
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return RT_ETIMEOUT;
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}
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#endif
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}
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#ifdef USE_TIMEOUT
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//DBOUT("%s timeout is %d\n",__FUNCTION__,to);
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#endif
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/*for the buf is big-endian we must reverse it*/
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for(i = 0;i<0x80;i++)
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{
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temp = buf[0];
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buf[0] = buf[3];
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buf[3] = temp;
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temp = buf[1];
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buf[1] = buf[2];
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buf[2] = temp;
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buf += 4;
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}
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return RT_EOK;
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}
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static rt_uint8_t sd_readmultiblock(rt_uint32_t address, rt_uint8_t* buf,rt_uint32_t size)
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{
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rt_int32_t index;
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rt_uint8_t status=RT_EOK;
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for(index = 0;index < size;index++)
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{
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status = sd_readblock(address+index*SECTOR_SIZE,buf+index*SECTOR_SIZE);
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if(status!=RT_EOK)
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break;
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}
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return status;
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}
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/**
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* This function will set a hook function, which will be invoked when a memory
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* block is allocated from heap memory.
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*
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* @param hook the hook function
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*/
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static rt_uint8_t sd_writeblock(rt_uint32_t address, rt_uint8_t* buf)
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{
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U32 complete;
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rt_uint8_t temp;
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rt_uint8_t *ptr = buf;
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rt_err_t err;
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#ifdef USE_TIMEOUT
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rt_uint32_t to = 10;
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#endif
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int i;
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rt_kprintf("in writeblock:%x\n",address);
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/*for the buf is big-endian we must reverse it*/
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for(i = 0;i<0x80;i++)
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{
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temp = ptr[0];
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ptr[0] = ptr[3];
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ptr[3] = temp;
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temp = ptr[1];
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ptr[1] = ptr[2];
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ptr[2] = temp;
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ptr += 4;
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}
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//Clear all the errors & interrups
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*(RP)DMAC_INTINTERRCLR |= 0x1;
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*(RP)DMAC_INTINTERRCLR &= ~0x1;
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*(RP)DMAC_INTTCCLEAR |= 0x1;
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*(RP)DMAC_INTTCCLEAR &= ~0x1;
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//***********************配置DMA2进行四位写*************************
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*(RP)DMAC_C2SRCADDR = (U32)buf; //DMAC道2源地址赋为0x30200000
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*(RP)DMAC_C2DESTADDR = SDC_WRITE_BUFER_ACCESS; //DMAC道2目的地址赋为发送FIFO的地址
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*(RP)DMAC_C2CONTROL = 0x20149b; //传输尺寸0x080,源地址增加目的地址不增加，传输宽度32bit，传输的数目4
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*(RP)DMAC_C2CONFIGURATION = 0x380b; //不屏蔽传输中断，屏蔽错误中断，通道使能，传输类型：存储器到外设
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err = cmd_wait(0x6ea,RCA,0xfff); //CMD55，以切换到ACMD命令
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if(err != RT_EOK)
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{
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rt_set_errno(err);
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return err;
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}
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err = cmd_wait(0xca,0x2,0xfff); //ACMD6，定义数据线宽度，48 位短反馈，无数据传输
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if(err != RT_EOK)
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{
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rt_set_errno(err);
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return err;
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}
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err = cmd_response(0x30e,address,0X3,0x0200,0x1,0Xfff); //CMD24 1bit mode
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if(err != RT_EOK)
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{
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rt_set_errno(err);
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return err;
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}
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complete = *(RP)SDC_INTERRUPT_STATUS;
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if((complete |0xfffffffe) !=0xfffffffe) //响应超时错误
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{
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//printf("CRC ERROR");
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complete = *(RP)SDC_INTERRUPT_STATUS;
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}
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while(((*(RP)( DMAC_INTTCSTATUS)) & 0x4) != 0x4 )
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{
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delay(10);
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#ifdef USE_TIMEOUT
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to--;
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if(!to)
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{
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EOUT("%s TIMEOUT\n",__FUNCTION__);
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}
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#endif
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}
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#ifdef USE_TIMEOUT
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//DBOUT("%s timeout is %d\n",__FUNCTION__,to);
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#endif
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return RT_EOK;
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}
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/**
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* This function will set a hook function, which will be invoked when a memory
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* block is allocated from heap memory.
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*
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* @param hook the hook function
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*/
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static rt_err_t rt_sdcard_init(rt_device_t dev)
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{
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return 0;
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}
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/**
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* This function will set a hook function, which will be invoked when a memory
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* block is allocated from heap memory.
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*
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* @param hook the hook function
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*/
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static rt_err_t rt_sdcard_open(rt_device_t dev, rt_uint16_t oflag)
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{
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return 0;
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}
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/**
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* This function will set a hook function, which will be invoked when a memory
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* block is allocated from heap memory.
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*
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* @param hook the hook function
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*/
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static rt_err_t rt_sdcard_close(rt_device_t dev)
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{
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return 0;
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}
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/**
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* This function will set a hook function, which will be invoked when a memory
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* block is allocated from heap memory.
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*
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* @param hook the hook function
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*/
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||
static rt_err_t rt_sdcard_control(rt_device_t dev, rt_uint8_t cmd, void *args)
|
||
{
|
||
rt_kprintf("cmd = %d\n",cmd);
|
||
RT_ASSERT(dev != RT_NULL);
|
||
|
||
if (cmd == RT_DEVICE_CTRL_BLK_GETGEOME)
|
||
{
|
||
struct rt_device_blk_geometry *geometry;
|
||
|
||
geometry = (struct rt_device_blk_geometry *)args;
|
||
if (geometry == RT_NULL) return -RT_ERROR;
|
||
|
||
geometry->bytes_per_sector = 512;
|
||
geometry->block_size = 0x200000;
|
||
//if (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
|
||
// geometry->sector_count = (SDCardInfo.SD_csd.DeviceSize + 1) * 1024;
|
||
//else
|
||
geometry->sector_count = 0x200000;//SDCardInfo.CardCapacity/SDCardInfo.CardBlockSize;
|
||
}
|
||
|
||
return RT_EOK;
|
||
}
|
||
|
||
/**
|
||
* This function will set a hook function, which will be invoked when a memory
|
||
* block is allocated from heap memory.
|
||
*
|
||
* @param hook the hook function
|
||
*/
|
||
static rt_size_t rt_sdcard_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
|
||
{
|
||
rt_uint32_t retry = 3;
|
||
rt_uint8_t status;
|
||
rt_uint32_t index;
|
||
|
||
///*take the semaphore
|
||
struct dfs_partition *part = (struct dfs_partition *)dev->user_data;
|
||
rt_sem_take(part->lock, RT_WAITING_FOREVER);
|
||
while(retry--)
|
||
{
|
||
if (((rt_uint32_t)buffer % 4 != 0) ||
|
||
((rt_uint32_t)buffer > 0x20080000))
|
||
{
|
||
for(index = 0;index < size;index++)
|
||
{
|
||
status = sd_readblock((part->offset + pos) * SECTOR_SIZE,ptr_sddev->sec_buf);
|
||
if(status != RT_EOK)
|
||
break;
|
||
|
||
rt_memcpy((rt_uint8_t *)buffer + (index * SECTOR_SIZE),ptr_sddev->sec_buf,SECTOR_SIZE);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
for(index = 0;index<size;index++)
|
||
{
|
||
status = sd_readblock((pos) * SECTOR_SIZE,(rt_uint8_t*)buffer + index * SECTOR_SIZE);
|
||
if(status != RT_EOK)
|
||
break;
|
||
}
|
||
}
|
||
|
||
}
|
||
rt_sem_release(part->lock);
|
||
|
||
if (status == RT_EOK)
|
||
return size;
|
||
|
||
rt_kprintf("read failed: %d, buffer 0x%08x\n", status, buffer);
|
||
return 0;
|
||
|
||
}
|
||
|
||
/**
|
||
* This function will set a hook function, which will be invoked when a memory
|
||
* block is allocated from heap memory.
|
||
*
|
||
* @param hook the hook function
|
||
*/
|
||
static rt_size_t rt_sdcard_write (rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)
|
||
{
|
||
int i;
|
||
rt_uint8_t status;
|
||
|
||
struct dfs_partition *part = (struct dfs_partition *)dev->user_data;
|
||
|
||
if ( dev == RT_NULL )
|
||
{
|
||
rt_set_errno(-DFS_STATUS_EINVAL);
|
||
return 0;
|
||
}
|
||
|
||
rt_sem_take(part->lock, RT_WAITING_FOREVER);
|
||
|
||
if (((rt_uint32_t)buffer % 4 != 0) ||
|
||
((rt_uint32_t)buffer > 0x20080000))
|
||
{
|
||
rt_uint32_t index;
|
||
|
||
for(index=0;index<size;index++)
|
||
{
|
||
rt_memcpy(ptr_sddev->sec_buf, ((rt_uint8_t*)buffer + index * SECTOR_SIZE), SECTOR_SIZE);
|
||
status = sd_writeblock((part->offset + index + pos)*SECTOR_SIZE,ptr_sddev->sec_buf);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
|
||
for(i=0;i<size;i++)
|
||
{
|
||
status = sd_writeblock((part->offset + i + pos)*SECTOR_SIZE,
|
||
(rt_uint8_t*)((rt_uint8_t*)buffer + i * SECTOR_SIZE));
|
||
if (status != RT_EOK) break;
|
||
}
|
||
}
|
||
|
||
rt_sem_release(part->lock);
|
||
|
||
if (status == RT_EOK)
|
||
return size;
|
||
|
||
rt_kprintf("read failed: %d, buffer 0x%08x\n", status, buffer);
|
||
return 0;
|
||
}
|
||
|
||
|
||
rt_err_t rt_hw_sdcard_exit()
|
||
{
|
||
if(ptr_sddev->device != RT_NULL)
|
||
rt_free(ptr_sddev->device);
|
||
if(ptr_sddev->part != RT_NULL)
|
||
rt_free(ptr_sddev->part);
|
||
if(ptr_sddev != RT_NULL)
|
||
rt_free(ptr_sddev);
|
||
|
||
return RT_EOK;
|
||
}
|
||
|
||
/**
|
||
* This function will init sd card
|
||
*
|
||
* @param void
|
||
*/
|
||
rt_err_t rt_hw_sdcard_init()
|
||
{
|
||
/*For test*/
|
||
rt_err_t err;
|
||
rt_int32_t i;
|
||
|
||
char dname[4];
|
||
char sname[8];
|
||
|
||
/*Initialize structure*/
|
||
|
||
ptr_sddev = (struct sd_device*)rt_malloc(sizeof(struct sd_device));
|
||
if(ptr_sddev == RT_NULL)
|
||
{
|
||
EOUT("Failed to allocate sdcard device structure\n");
|
||
return RT_ENOMEM;
|
||
}
|
||
|
||
/*sdcard intialize*/
|
||
err = sd_init();
|
||
if(err != RT_EOK)
|
||
goto FAIL2;
|
||
|
||
/*set sector buffer*/
|
||
ptr_sddev->sec_buf = gsec_buf;
|
||
ptr_sddev->buf_size = SECTOR_SIZE;
|
||
ptr_sddev->sdc = (struct sd_c*)SD_BASE;
|
||
|
||
//DBOUT("allocate partition sector buffer OK!");
|
||
|
||
err = sd_readblock(0,ptr_sddev->sec_buf);
|
||
if(err != RT_EOK)
|
||
{
|
||
EOUT("read first block error\n");
|
||
goto FAIL2;
|
||
}
|
||
|
||
/*sdcard driver initialize*/
|
||
ptr_sddev->part = (struct dfs_partition*)rt_malloc(4 * sizeof(struct dfs_partition));
|
||
if(ptr_sddev->part == RT_NULL)
|
||
{
|
||
EOUT("allocate partition failed\n");
|
||
err = RT_ENOMEM;
|
||
goto FAIL2;
|
||
}
|
||
|
||
/*alloc device buffer*/
|
||
ptr_sddev->device = (struct rt_device*)rt_malloc(4 * sizeof(struct rt_device));
|
||
if(ptr_sddev->device == RT_NULL)
|
||
{
|
||
EOUT("allocate device failed\n");
|
||
err = RT_ENOMEM;
|
||
goto FAIL1;
|
||
}
|
||
|
||
ptr_sddev->part_num = 0;
|
||
|
||
err = sd_readblock(0,ptr_sddev->sec_buf);
|
||
|
||
if(err != RT_EOK)
|
||
{
|
||
EOUT("Read block 0 to initialize ERROR\n");
|
||
goto FAIL1;
|
||
}
|
||
|
||
for(i=0; i<4; i++)
|
||
{
|
||
/* get the first partition */
|
||
err = dfs_filesystem_get_partition(&(ptr_sddev->part[i]), ptr_sddev->sec_buf, i);
|
||
if (err == RT_EOK)
|
||
{
|
||
rt_snprintf(dname, 4, "sd%d", i);
|
||
rt_snprintf(sname, 8, "sem_sd%d", i);
|
||
ptr_sddev->part[i].lock = rt_sem_create(sname, 1, RT_IPC_FLAG_FIFO);
|
||
|
||
/* register sdcard device */
|
||
ptr_sddev->device[i].init = rt_sdcard_init;
|
||
ptr_sddev->device[i].open = rt_sdcard_open;
|
||
ptr_sddev->device[i].close = rt_sdcard_close;
|
||
ptr_sddev->device[i].read = rt_sdcard_read;
|
||
ptr_sddev->device[i].write = rt_sdcard_write;
|
||
ptr_sddev->device[i].control = rt_sdcard_control;
|
||
ptr_sddev->device[i].user_data= &ptr_sddev->part[i];
|
||
|
||
err = rt_device_register(&ptr_sddev->device[i], dname,
|
||
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_REMOVABLE | RT_DEVICE_FLAG_STANDALONE);
|
||
|
||
if(err == RT_EOK)
|
||
ptr_sddev->part_num++;
|
||
}
|
||
else
|
||
{
|
||
if(i == 0)
|
||
{
|
||
/* there is no partition table */
|
||
ptr_sddev->part[0].offset = 0;
|
||
ptr_sddev->part[0].size = 0;
|
||
ptr_sddev->part[0].lock = rt_sem_create("sem_sd0", 1, RT_IPC_FLAG_FIFO);
|
||
|
||
/* register sdcard device */
|
||
ptr_sddev->device[0].init = rt_sdcard_init;
|
||
ptr_sddev->device[0].open = rt_sdcard_open;
|
||
ptr_sddev->device[0].close = rt_sdcard_close;
|
||
ptr_sddev->device[0].read = rt_sdcard_read;
|
||
ptr_sddev->device[0].write = rt_sdcard_write;
|
||
ptr_sddev->device[0].control = rt_sdcard_control;
|
||
ptr_sddev->device[0].user_data= &ptr_sddev->part[0];
|
||
|
||
err = rt_device_register(&ptr_sddev->device[0], "sd0",
|
||
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_REMOVABLE | RT_DEVICE_FLAG_STANDALONE);
|
||
|
||
if(err == RT_EOK)
|
||
ptr_sddev->part_num++;
|
||
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
if(ptr_sddev->part_num == 0)
|
||
goto FAIL0;
|
||
|
||
return err;
|
||
|
||
FAIL0:
|
||
rt_free(ptr_sddev->device);
|
||
ptr_sddev->device = RT_NULL;
|
||
|
||
FAIL1:
|
||
rt_free(ptr_sddev->part);
|
||
ptr_sddev->part = RT_NULL;
|
||
|
||
FAIL2:
|
||
rt_free(ptr_sddev);
|
||
ptr_sddev = RT_NULL;
|
||
|
||
return err;
|
||
|
||
|
||
}
|
||
|
||
#endif
|