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rt-thread/bsp/mini2440/sdcard.c

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/*
* File : sd.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006, 2007, RT-Thread Develop Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2007-12-02 Yi.Qiu the first version
* 2010-01-01 Bernard Modify for mini2440
*/
#include "sdcard.h"
extern rt_uint32_t PCLK;
volatile rt_uint32_t rd_cnt;
volatile rt_uint32_t wt_cnt;
volatile rt_int32_t RCA;
/**
* 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 void sd_delay(rt_uint32_t ms)
{
ms *= 7326;
while(--ms);
}
/**
* 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 int sd_cmd_end(int cmd, int be_resp)
{
int finish0;
if(!be_resp)
{
finish0=SDICSTA;
while((finish0&0x800)!=0x800)
finish0=SDICSTA;
SDICSTA=finish0;
return RT_EOK;
}
else
{
finish0=SDICSTA;
while( !( ((finish0&0x200)==0x200) | ((finish0&0x400)==0x400) ))
finish0=SDICSTA;
if(cmd==1 || cmd==41)
{
if( (finish0&0xf00) != 0xa00 )
{
SDICSTA=finish0;
if(((finish0&0x400)==0x400))
return RT_ERROR;
}
SDICSTA=finish0;
}
else
{
if( (finish0&0x1f00) != 0xa00 )
{
rt_kprintf("CMD%d:SDICSTA=0x%x, SDIRSP0=0x%x\n",
cmd, SDICSTA, SDIRSP0);
SDICSTA=finish0;
if(((finish0&0x400)==0x400))
return RT_ERROR;
}
SDICSTA=finish0;
}
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 int sd_data_end(void)
{
int finish;
finish=SDIDSTA;
while( !( ((finish&0x10)==0x10) | ((finish&0x20)==0x20) ))
{
finish=SDIDSTA;
}
if( (finish&0xfc) != 0x10 )
{
SDIDSTA=0xec;
return RT_ERROR;
}
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 void sd_cmd0(void)
{
SDICARG=0x0;
SDICCON=(1<<8)|0x40;
sd_cmd_end(0, 0);
SDICSTA=0x800; /* Clear cmd_end(no rsp) */
}
/**
* 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 int sd_cmd55(void)
{
SDICARG = RCA << 16;
SDICCON = (0x1 << 9) | (0x1 << 8) | 0x77;
if(sd_cmd_end(55, 1) == RT_ERROR)
{
rt_kprintf("CMD55 error\n");
return RT_ERROR;
}
SDICSTA=0xa00;
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 void sd_sel_desel(char sel_desel)
{
if(sel_desel)
{
RECMDS7:
SDICARG =RCA << 16;
SDICCON = (0x1 << 9) | (0x1 << 8) | 0x47;
if(sd_cmd_end(7, 1) == RT_ERROR)
goto RECMDS7;
SDICSTA = 0xa00;
if(SDIRSP0 & 0x1e00 != 0x800)
goto RECMDS7;
}
else
{
RECMDD7:
SDICARG=0<<16;
SDICCON=(0x1<<8)|0x47;
if(sd_cmd_end(7, 0) == RT_ERROR)
goto RECMDD7;
SDICSTA = 0x800;
}
}
/**
* 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 void sd_setbus(void)
{
do
{
sd_cmd55();
SDICARG = 1<<1; /* 4bit bus */
SDICCON=(0x1<<9)|(0x1<<8)|0x46; /* sht_resp, wait_resp, start, CMD55 */
}while (sd_cmd_end(6, 1) == RT_ERROR);
SDICSTA=0xa00; /* Clear cmd_end(with rsp) */
}
/**
* 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
*/
int sd_ocr(void)
{
int i;
/* Negotiate operating condition for SD, it makes card ready state */
for(i=0;i<50;i++)
{
sd_cmd55();
SDICARG=0xff8000;
SDICCON=(0x1<<9)|(0x1<<8)|0x69;
/* if using real board, should replace code here. need to modify qemu in near future*/
/* Check end of ACMD41 */
if( (sd_cmd_end(41, 1)==RT_EOK) & SDIRSP0==0x80ff8000 )
{
SDICSTA=0xa00;
return RT_EOK;
}
sd_delay(200);
}
SDICSTA=0xa00;
return RT_ERROR;
}
/**
* 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
*/
rt_uint8_t sd_init(void)
{
//-- SD controller & card initialize
int i;
/* Important notice for MMC test condition */
/* Cmd & Data lines must be enabled by pull up resister */
SDIPRE = PCLK/(INICLK)-1;
SDICON = (0<<4) | 1; // Type A, clk enable
SDIFSTA = SDIFSTA | (1<<16);
SDIBSIZE = 0x200; /* 512byte per one block */
SDIDTIMER=0x7fffff; /* timeout count */
/* Wait 74SDCLK for MMC card */
for(i=0; i<0x1000; i++);
sd_cmd0();
/* Check SD card OCR */
if(sd_ocr() == RT_EOK)
{
rt_kprintf("In SD ready\n");
}
else
{
rt_kprintf("Initialize fail\nNo Card assertion\n");
return RT_ERROR;
}
RECMD2:
SDICARG = 0x0;
SDICCON = (0x1<<10)|(0x1<<9)|(0x1<<8)|0x42; /* lng_resp, wait_resp, start, CMD2 */
if(sd_cmd_end(2, 1) == RT_ERROR)
goto RECMD2;
SDICSTA = 0xa00; /* Clear cmd_end(with rsp) */
RECMD3:
SDICARG = 0<<16; /* CMD3(MMC:Set RCA, SD:Ask RCA-->SBZ) */
SDICCON = (0x1<<9)|(0x1<<8)|0x43; /* sht_resp, wait_resp, start, CMD3 */
if(sd_cmd_end(3, 1) == RT_ERROR)
goto RECMD3;
SDICSTA=0xa00; /* Clear cmd_end(with rsp) */
RCA = (SDIRSP0 & 0xffff0000 )>>16;
SDIPRE=PCLK/(SDCLK)-1; /* Normal clock=25MHz */
if( SDIRSP0 & 0x1e00 != 0x600 )
goto RECMD3;
sd_sel_desel(1);
sd_delay(200);
sd_setbus();
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
*/
rt_uint8_t sd_readblock(rt_uint32_t address, rt_uint8_t* buf)
{
int status;
rd_cnt=0;
SDIFSTA = SDIFSTA | (1<<16);
SDIDCON = (2 << 22) | (1 << 19) | (1 << 17) | (1 << 16) | (1 << 14) | (2 << 12) | (1 << 0);
SDICARG = address;
RERDCMD:
SDICCON = (0x1 << 9 ) | (0x1 << 8) | 0x51;
if(sd_cmd_end(17, 1) == RT_ERROR)
{
rt_kprintf("Read CMD Error\n");
goto RERDCMD;
}
SDICSTA = 0xa00;
while(rd_cnt < 128)
{
if((SDIDSTA & 0x20) == 0x20)
{
SDIDSTA = (0x1 << 0x5);
break;
}
status = SDIFSTA;
if((status & 0x1000) == 0x1000)
{
*(rt_uint32_t *)buf = SDIDAT;
rd_cnt++;
buf += 4;
}
}
if(sd_data_end() == RT_ERROR)
{
rt_kprintf("Dat error\n");
return RT_ERROR;
}
SDIDCON = SDIDCON &~ (7<<12);
SDIFSTA = SDIFSTA & 0x200;
SDIDSTA = 0x10;
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
*/
rt_uint8_t sd_writeblock(rt_uint32_t address, rt_uint8_t* buf)
{
int status;
wt_cnt=0;
SDIFSTA = SDIFSTA | (1 << 16);
SDIDCON = (2 << 22) | (1 << 20) | (1 << 17) | (1 << 16) | (1 << 14) | (3 << 12) | (1 << 0);
SDICARG = address;
REWTCMD:
SDICCON = (0x1 << 9) | (0x1 << 8) |0x58;
if(sd_cmd_end(24, 1) == RT_ERROR)
goto REWTCMD;
SDICSTA=0xa00;
while(wt_cnt < 128*1)
{
status = SDIFSTA;
if((status & 0x2000) == 0x2000)
{
SDIDAT=*(rt_uint32_t*)buf;
wt_cnt++;
buf += 4;
}
}
if(sd_data_end() == RT_ERROR)
{
rt_kprintf("Data Error\n");
return RT_ERROR;
}
SDIDCON = SDIDCON &~ (7<<12);
SDIDSTA = 0x10;
return RT_EOK;
}
#ifdef RT_USING_DFS
/* RT-Thread Device Driver Interface */
#include <rtthread.h>
#include <dfs_fs.h>
struct rt_device sdcard_device[4];
struct dfs_partition part[4];
/**
* 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_err_t rt_sdcard_init(rt_device_t dev)
{
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_err_t rt_sdcard_open(rt_device_t dev, rt_uint16_t oflag)
{
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_err_t rt_sdcard_close(rt_device_t dev)
{
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_err_t rt_sdcard_control(rt_device_t dev, rt_uint8_t cmd, void *args)
{
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_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
{
int i;
struct dfs_partition *part = (struct dfs_partition *)dev->private;
if ( dev == RT_NULL )
{
rt_set_errno(-DFS_STATUS_EINVAL);
return 0;
}
/* read all sectors */
for (i = 0; i < size / SECTOR_SIZE; i ++)
{
rt_sem_take(part->lock, RT_WAITING_FOREVER);
sd_readblock((part->offset + i)*SECTOR_SIZE + pos,
(rt_uint8_t*)((rt_uint8_t*)buffer + i * SECTOR_SIZE));
rt_sem_release(part->lock);
}
/* the length of reading must align to SECTOR SIZE */
return size;
}
/**
* 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;
struct dfs_partition *part = (struct dfs_partition *)dev->private;
if ( dev == RT_NULL )
{
rt_set_errno(-DFS_STATUS_EINVAL);
return 0;
}
/* read all sectors */
for (i = 0; i < size / SECTOR_SIZE; i++)
{
rt_sem_take(part->lock, RT_WAITING_FOREVER);
sd_writeblock((part->offset + i)*SECTOR_SIZE + pos,
(rt_uint8_t*)((rt_uint8_t*)buffer + i * SECTOR_SIZE));
rt_sem_release(part->lock);
}
/* the length of reading must align to SECTOR SIZE */
return size;
}
/**
* This function will register sd card to device system
*
* @param hook the hook function
*/
void rt_hw_sdcard_init()
{
rt_uint8_t i, status;
rt_uint8_t *sector;
char dname[4];
char sname[8];
/* Enable PCLK into SDI Block */
CLKCON |= 1 << 9;
/* Setup GPIO as SD and SDCMD, SDDAT[3:0] Pull up En */
GPEUP = GPEUP & (~(0x3f << 5)) | (0x01 << 5);
GPECON = GPECON & (~(0xfff << 10)) | (0xaaa << 10);
RCA = 0;
if (sd_init() == RT_EOK)
{
/* get the first sector to read partition table */
sector = (rt_uint8_t*) rt_malloc (512);
if (sector == RT_NULL)
{
rt_kprintf("allocate partition sector buffer failed\n");
return;
}
status = sd_readblock(0, sector);
if (status == RT_EOK)
{
for(i=0; i<4; i++)
{
/* get the first partition */
status = dfs_filesystem_get_partition(&part[i], sector, i);
if (status == RT_EOK)
{
rt_snprintf(dname, 4, "sd%d", i);
rt_snprintf(sname, 8, "sem_sd%d", i);
part[i].lock = rt_sem_create(sname, 1, RT_IPC_FLAG_FIFO);
/* register sdcard device */
sdcard_device[i].init = rt_sdcard_init;
sdcard_device[i].open = rt_sdcard_open;
sdcard_device[i].close = rt_sdcard_close;
sdcard_device[i].read = rt_sdcard_read;
sdcard_device[i].write = rt_sdcard_write;
sdcard_device[i].control = rt_sdcard_control;
sdcard_device[i].private= &part[i];
rt_device_register(&sdcard_device[i], dname,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_REMOVABLE | RT_DEVICE_FLAG_STANDALONE);
}
else
{
if(i == 0)
{
/* there is no partition table */
part[0].offset = 0;
part[0].size = 0;
part[0].lock = rt_sem_create("sem_sd0", 1, RT_IPC_FLAG_FIFO);
/* register sdcard device */
sdcard_device[0].init = rt_sdcard_init;
sdcard_device[0].open = rt_sdcard_open;
sdcard_device[0].close = rt_sdcard_close;
sdcard_device[0].read = rt_sdcard_read;
sdcard_device[0].write = rt_sdcard_write;
sdcard_device[0].control = rt_sdcard_control;
sdcard_device[0].private= &part[0];
rt_device_register(&sdcard_device[0], "sd0",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_REMOVABLE | RT_DEVICE_FLAG_STANDALONE);
break;
}
}
}
}
else
{
rt_kprintf("read sdcard first sector failed\n");
}
/* release sector buffer */
rt_free(sector);
return;
}
else
{
rt_kprintf("sdcard init failed\n");
}
}
#endif
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