libs/rt-thread
libs
/
rt-thread
4
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

add csd support for mini2440 sdio driver.

This commit is contained in:
kuangdazzidd 2017-11-30 20:41:45 +08:00
parent 8988d64448
commit c3e2f6a568
1 changed files with 110 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

120
bsp/mini2440/drivers/sdcard.c
View File

@ -8,19 +8,26 @@
* 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
* 2012-12-15 amr168 support SDHC
* Date Author Notes
* 2007-12-02 Yi.Qiu the first version
* 2010-01-01 Bernard Modify for mini2440
* 2012-12-15 amr168 support SDHC
* 2017-11-20 kuangdazzidd add csd cmd support
*/
#include "sdcard.h"
#include "rtdef.h"
extern rt_uint32_t PCLK;
volatile rt_uint32_t rd_cnt;
volatile rt_uint32_t wt_cnt;
volatile rt_int32_t RCA;
volatile rt_int32_t sd_type;
extern rt_uint32_t PCLK;
volatile rt_uint32_t rd_cnt;
volatile rt_uint32_t wt_cnt;
volatile rt_int32_t RCA;
volatile rt_int32_t sd_type;
struct sd_csd {
rt_uint16_t bsize;
rt_uint32_t nblks;
}g_sd_csd;
static void sd_delay(rt_uint32_t ms)
{
@ -118,9 +125,25 @@ static int sd_cmd55(void)
SDICSTA = 0xa00;
return RT_EOK;
}
static int sd_cmd9(void *p_rsp)
{
SDICARG = RCA << 16;
SDICCON = (1 << 10) | (1 << 9) | (0x1<<8) | (0x40 | 0x09);
sd_cmd_end(9, 1);
((rt_uint32_t *)p_rsp)[0] = SDIRSP3;
((rt_uint32_t *)p_rsp)[1] = SDIRSP2;
((rt_uint32_t *)p_rsp)[2] = SDIRSP1;
((rt_uint32_t *)p_rsp)[3] = SDIRSP0;
return RT_EOK;
}
static void sd_sel_desel(char sel_desel)
{
if (sel_desel)
@ -161,6 +184,75 @@ static void sd_setbus(void)
SDICSTA=0xa00; /* Clear cmd_end(with rsp) */
}
static rt_uint32_t bits_str (rt_uint32_t *str, rt_uint32_t start, rt_uint8_t len)
{
rt_uint32_t mask;
rt_uint32_t index;
rt_uint8_t shift;
rt_uint32_t value;
mask = (int)((len < 32) ? (1 << len) : 0) - 1;
index = start / 32;
shift = start & 31;
value = str[index] >> shift;
if ((len + shift) > 32) {
value |= str[index + 1] << (32 - shift);
}
value &= mask;
return value;
}
static int sd_decode_csd (rt_uint32_t *p_csd)
{
rt_uint32_t e, m, r;
rt_uint8_t structure;
structure = bits_str(p_csd, 126, 2);
switch (structure) {
case 0:
m = bits_str(p_csd, 99, 4);
e = bits_str(p_csd, 96, 3);
g_sd_csd.bsize = 512;
m = bits_str(p_csd, 62, 12);
e = bits_str(p_csd, 47, 3);
r = bits_str(p_csd, 80, 4);
g_sd_csd.nblks = ((1 + m) << (e + r - 7));
break;
case 1:
m = bits_str(p_csd, 99, 4);
e = bits_str(p_csd, 96, 3);
g_sd_csd.bsize = 512;
m = bits_str(p_csd, 48, 22);
g_sd_csd.nblks = (1 + m) << 10;
break;
default:
return RT_ERROR;
}
return RT_EOK;
}
static int sd_send_csd(rt_uint32_t *p_csd)
{
int ret;
rt_uint32_t rsp[4];
ret = sd_cmd9((void*)&rsp);
if (ret != 0) {
return ret;
}
rt_memcpy((void*)p_csd, (void*)rsp, 16);
return RT_EOK;
}
static int sd_ocr(void)
{
int i, ver=0;
@ -213,7 +305,8 @@ rt_err_t sd_cmd8(void)
static rt_uint8_t sd_init(void)
{
//-- SD controller & card initialize
int i;
int i;
rt_uint32_t csd[4];
/* Important notice for MMC test condition */
/* Cmd & Data lines must be enabled by pull up resister */
SDIPRE = PCLK / (INICLK) - 1;
@ -256,6 +349,9 @@ RECMD3:
goto RECMD3;
SDICSTA=0xa00; /* Clear cmd_end(with rsp) */
sd_send_csd(csd);
sd_decode_csd(csd);
RCA = (SDIRSP0 & 0xffff0000) >> 16;
SDIPRE = PCLK / (SDCLK) - 1; /* Normal clock=25MHz */
if (SDIRSP0 & 0x1e00 != 0x600)
@ -385,6 +481,10 @@ static rt_err_t rt_sdcard_close(rt_device_t dev)
static rt_err_t rt_sdcard_control(rt_device_t dev, int cmd, void *args)
{
struct rt_device_blk_geometry *p_geometry = (struct rt_device_blk_geometry *)args;
p_geometry->block_size = g_sd_csd.bsize;
p_geometry->sector_count = g_sd_csd.nblks;
p_geometry->bytes_per_sector = 512;
return RT_EOK;
}