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体验新版 GitCode,发现更多精彩内容 >>
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c3e2f6a5
编写于
11月 30, 2017
作者:
K
kuangdazzidd
浏览文件
操作
浏览文件
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电子邮件补丁
差异文件
add csd support for mini2440 sdio driver.
上级
8988d644
变更
1
显示空白变更内容
内联
并排
Showing
1 changed file
with
110 addition
and
10 deletion
+110
-10
bsp/mini2440/drivers/sdcard.c
bsp/mini2440/drivers/sdcard.c
+110
-10
未找到文件。
bsp/mini2440/drivers/sdcard.c
浏览文件 @
c3e2f6a5
...
...
@@ -12,9 +12,11 @@
* 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
;
...
...
@@ -22,6 +24,11 @@ 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
)
{
ms
*=
7326
;
...
...
@@ -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
;
...
...
@@ -214,6 +306,7 @@ static rt_uint8_t sd_init(void)
{
//-- SD controller & card initialize
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
;
}
...
...
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